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400fbf9f | 1 | /* Build expressions with type checking for C compiler. |
cbe34bb5 | 2 | Copyright (C) 1987-2017 Free Software Foundation, Inc. |
400fbf9f | 3 | |
1322177d | 4 | This file is part of GCC. |
400fbf9f | 5 | |
1322177d LB |
6 | GCC is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 9 | version. |
400fbf9f | 10 | |
1322177d LB |
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
400fbf9f JW |
15 | |
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
400fbf9f JW |
19 | |
20 | ||
21 | /* This file is part of the C front end. | |
22 | It contains routines to build C expressions given their operands, | |
23 | including computing the types of the result, C-specific error checks, | |
5088b058 | 24 | and some optimization. */ |
400fbf9f JW |
25 | |
26 | #include "config.h" | |
670ee920 | 27 | #include "system.h" |
4977bab6 | 28 | #include "coretypes.h" |
4d0cdd0c | 29 | #include "memmodel.h" |
2adfab87 AM |
30 | #include "target.h" |
31 | #include "function.h" | |
32 | #include "bitmap.h" | |
2adfab87 AM |
33 | #include "c-tree.h" |
34 | #include "gimple-expr.h" | |
35 | #include "predict.h" | |
d8a2d370 DN |
36 | #include "stor-layout.h" |
37 | #include "trans-mem.h" | |
38 | #include "varasm.h" | |
39 | #include "stmt.h" | |
e57e265b | 40 | #include "langhooks.h" |
29cc57cf | 41 | #include "c-lang.h" |
ab87f8c8 | 42 | #include "intl.h" |
325c3691 | 43 | #include "tree-iterator.h" |
45b0be94 | 44 | #include "gimplify.h" |
acf0174b | 45 | #include "tree-inline.h" |
629b3d75 | 46 | #include "omp-general.h" |
61d3ce20 | 47 | #include "c-family/c-objc.h" |
de5a5fa1 | 48 | #include "c-family/c-ubsan.h" |
41dbbb37 | 49 | #include "gomp-constants.h" |
6a3f203c | 50 | #include "spellcheck-tree.h" |
745e411d | 51 | #include "gcc-rich-location.h" |
314e6352 ML |
52 | #include "stringpool.h" |
53 | #include "attribs.h" | |
45b2222a | 54 | #include "asan.h" |
325c3691 | 55 | |
2ac2f164 JM |
56 | /* Possible cases of implicit bad conversions. Used to select |
57 | diagnostic messages in convert_for_assignment. */ | |
58 | enum impl_conv { | |
59 | ic_argpass, | |
60 | ic_assign, | |
61 | ic_init, | |
62 | ic_return | |
63 | }; | |
64 | ||
bc4b653b JM |
65 | /* The level of nesting inside "__alignof__". */ |
66 | int in_alignof; | |
67 | ||
68 | /* The level of nesting inside "sizeof". */ | |
69 | int in_sizeof; | |
70 | ||
71 | /* The level of nesting inside "typeof". */ | |
72 | int in_typeof; | |
400fbf9f | 73 | |
1a4049e7 JJ |
74 | /* The argument of last parsed sizeof expression, only to be tested |
75 | if expr.original_code == SIZEOF_EXPR. */ | |
76 | tree c_last_sizeof_arg; | |
40ffd95f | 77 | location_t c_last_sizeof_loc; |
1a4049e7 | 78 | |
9bac5cbb G |
79 | /* Nonzero if we might need to print a "missing braces around |
80 | initializer" message within this initializer. */ | |
81 | static int found_missing_braces; | |
103b7b17 | 82 | |
bf730f15 RS |
83 | static int require_constant_value; |
84 | static int require_constant_elements; | |
85 | ||
58f9752a | 86 | static bool null_pointer_constant_p (const_tree); |
f55ade6e | 87 | static tree qualify_type (tree, tree); |
dc5027f4 JM |
88 | static int tagged_types_tu_compatible_p (const_tree, const_tree, bool *, |
89 | bool *); | |
744aa42f | 90 | static int comp_target_types (location_t, tree, tree); |
dc5027f4 JM |
91 | static int function_types_compatible_p (const_tree, const_tree, bool *, |
92 | bool *); | |
93 | static int type_lists_compatible_p (const_tree, const_tree, bool *, bool *); | |
f55ade6e | 94 | static tree lookup_field (tree, tree); |
81e5eca8 MP |
95 | static int convert_arguments (location_t, vec<location_t>, tree, |
96 | vec<tree, va_gc> *, vec<tree, va_gc> *, tree, | |
97 | tree); | |
db3927fb | 98 | static tree pointer_diff (location_t, tree, tree); |
68fca595 | 99 | static tree convert_for_assignment (location_t, location_t, tree, tree, tree, |
744aa42f | 100 | enum impl_conv, bool, tree, tree, int); |
f55ade6e AJ |
101 | static tree valid_compound_expr_initializer (tree, tree); |
102 | static void push_string (const char *); | |
103 | static void push_member_name (tree); | |
f55ade6e AJ |
104 | static int spelling_length (void); |
105 | static char *print_spelling (char *); | |
96b40f8d | 106 | static void warning_init (location_t, int, const char *); |
c2255bc4 | 107 | static tree digest_init (location_t, tree, tree, tree, bool, bool, int); |
30af3a2b | 108 | static void output_init_element (location_t, tree, tree, bool, tree, tree, bool, |
34cf811f | 109 | bool, struct obstack *); |
a1e3b3d9 | 110 | static void output_pending_init_elements (int, struct obstack *); |
30af3a2b | 111 | static bool set_designator (location_t, bool, struct obstack *); |
a1e3b3d9 | 112 | static void push_range_stack (tree, struct obstack *); |
96b40f8d MP |
113 | static void add_pending_init (location_t, tree, tree, tree, bool, |
114 | struct obstack *); | |
a1e3b3d9 LB |
115 | static void set_nonincremental_init (struct obstack *); |
116 | static void set_nonincremental_init_from_string (tree, struct obstack *); | |
117 | static tree find_init_member (tree, struct obstack *); | |
f37acdf9 | 118 | static void readonly_warning (tree, enum lvalue_use); |
7bd11157 | 119 | static int lvalue_or_else (location_t, const_tree, enum lvalue_use); |
4e2fb7de | 120 | static void record_maybe_used_decl (tree); |
dc5027f4 | 121 | static int comptypes_internal (const_tree, const_tree, bool *, bool *); |
6aa3c60d JM |
122 | \f |
123 | /* Return true if EXP is a null pointer constant, false otherwise. */ | |
124 | ||
125 | static bool | |
58f9752a | 126 | null_pointer_constant_p (const_tree expr) |
6aa3c60d JM |
127 | { |
128 | /* This should really operate on c_expr structures, but they aren't | |
129 | yet available everywhere required. */ | |
130 | tree type = TREE_TYPE (expr); | |
131 | return (TREE_CODE (expr) == INTEGER_CST | |
8bcd6380 | 132 | && !TREE_OVERFLOW (expr) |
6aa3c60d JM |
133 | && integer_zerop (expr) |
134 | && (INTEGRAL_TYPE_P (type) | |
135 | || (TREE_CODE (type) == POINTER_TYPE | |
136 | && VOID_TYPE_P (TREE_TYPE (type)) | |
137 | && TYPE_QUALS (TREE_TYPE (type)) == TYPE_UNQUALIFIED))); | |
138 | } | |
928c19bb JM |
139 | |
140 | /* EXPR may appear in an unevaluated part of an integer constant | |
141 | expression, but not in an evaluated part. Wrap it in a | |
142 | C_MAYBE_CONST_EXPR, or mark it with TREE_OVERFLOW if it is just an | |
143 | INTEGER_CST and we cannot create a C_MAYBE_CONST_EXPR. */ | |
144 | ||
145 | static tree | |
146 | note_integer_operands (tree expr) | |
147 | { | |
148 | tree ret; | |
149 | if (TREE_CODE (expr) == INTEGER_CST && in_late_binary_op) | |
150 | { | |
151 | ret = copy_node (expr); | |
152 | TREE_OVERFLOW (ret) = 1; | |
153 | } | |
154 | else | |
155 | { | |
156 | ret = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (expr), NULL_TREE, expr); | |
157 | C_MAYBE_CONST_EXPR_INT_OPERANDS (ret) = 1; | |
158 | } | |
159 | return ret; | |
160 | } | |
161 | ||
4d84fe7c JM |
162 | /* Having checked whether EXPR may appear in an unevaluated part of an |
163 | integer constant expression and found that it may, remove any | |
164 | C_MAYBE_CONST_EXPR noting this fact and return the resulting | |
165 | expression. */ | |
166 | ||
167 | static inline tree | |
168 | remove_c_maybe_const_expr (tree expr) | |
169 | { | |
170 | if (TREE_CODE (expr) == C_MAYBE_CONST_EXPR) | |
171 | return C_MAYBE_CONST_EXPR_EXPR (expr); | |
172 | else | |
173 | return expr; | |
174 | } | |
175 | ||
f13c9b2c AP |
176 | \f/* This is a cache to hold if two types are compatible or not. */ |
177 | ||
178 | struct tagged_tu_seen_cache { | |
179 | const struct tagged_tu_seen_cache * next; | |
58f9752a KG |
180 | const_tree t1; |
181 | const_tree t2; | |
f13c9b2c AP |
182 | /* The return value of tagged_types_tu_compatible_p if we had seen |
183 | these two types already. */ | |
184 | int val; | |
185 | }; | |
186 | ||
187 | static const struct tagged_tu_seen_cache * tagged_tu_seen_base; | |
188 | static void free_all_tagged_tu_seen_up_to (const struct tagged_tu_seen_cache *); | |
189 | ||
4f2e1536 MP |
190 | /* Do `exp = require_complete_type (loc, exp);' to make sure exp |
191 | does not have an incomplete type. (That includes void types.) | |
192 | LOC is the location of the use. */ | |
400fbf9f JW |
193 | |
194 | tree | |
4f2e1536 | 195 | require_complete_type (location_t loc, tree value) |
400fbf9f JW |
196 | { |
197 | tree type = TREE_TYPE (value); | |
198 | ||
7a0ca710 | 199 | if (error_operand_p (value)) |
ea0f786b CB |
200 | return error_mark_node; |
201 | ||
400fbf9f | 202 | /* First, detect a valid value with a complete type. */ |
d0f062fb | 203 | if (COMPLETE_TYPE_P (type)) |
400fbf9f JW |
204 | return value; |
205 | ||
4f2e1536 | 206 | c_incomplete_type_error (loc, value, type); |
400fbf9f JW |
207 | return error_mark_node; |
208 | } | |
209 | ||
210 | /* Print an error message for invalid use of an incomplete type. | |
211 | VALUE is the expression that was used (or 0 if that isn't known) | |
4f2e1536 MP |
212 | and TYPE is the type that was invalid. LOC is the location for |
213 | the error. */ | |
400fbf9f JW |
214 | |
215 | void | |
4f2e1536 | 216 | c_incomplete_type_error (location_t loc, const_tree value, const_tree type) |
400fbf9f | 217 | { |
400fbf9f JW |
218 | /* Avoid duplicate error message. */ |
219 | if (TREE_CODE (type) == ERROR_MARK) | |
220 | return; | |
221 | ||
3fa8871b | 222 | if (value != NULL_TREE && (VAR_P (value) || TREE_CODE (value) == PARM_DECL)) |
4f2e1536 | 223 | error_at (loc, "%qD has an incomplete type %qT", value, type); |
400fbf9f JW |
224 | else |
225 | { | |
226 | retry: | |
227 | /* We must print an error message. Be clever about what it says. */ | |
228 | ||
229 | switch (TREE_CODE (type)) | |
230 | { | |
231 | case RECORD_TYPE: | |
400fbf9f | 232 | case UNION_TYPE: |
400fbf9f | 233 | case ENUMERAL_TYPE: |
400fbf9f JW |
234 | break; |
235 | ||
236 | case VOID_TYPE: | |
4f2e1536 | 237 | error_at (loc, "invalid use of void expression"); |
400fbf9f JW |
238 | return; |
239 | ||
240 | case ARRAY_TYPE: | |
241 | if (TYPE_DOMAIN (type)) | |
242 | { | |
fba78abb RH |
243 | if (TYPE_MAX_VALUE (TYPE_DOMAIN (type)) == NULL) |
244 | { | |
4f2e1536 | 245 | error_at (loc, "invalid use of flexible array member"); |
fba78abb RH |
246 | return; |
247 | } | |
400fbf9f JW |
248 | type = TREE_TYPE (type); |
249 | goto retry; | |
250 | } | |
4f2e1536 | 251 | error_at (loc, "invalid use of array with unspecified bounds"); |
400fbf9f JW |
252 | return; |
253 | ||
254 | default: | |
366de0ce | 255 | gcc_unreachable (); |
400fbf9f JW |
256 | } |
257 | ||
258 | if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) | |
4f2e1536 | 259 | error_at (loc, "invalid use of undefined type %qT", type); |
400fbf9f JW |
260 | else |
261 | /* If this type has a typedef-name, the TYPE_NAME is a TYPE_DECL. */ | |
4f2e1536 | 262 | error_at (loc, "invalid use of incomplete typedef %qT", type); |
400fbf9f JW |
263 | } |
264 | } | |
265 | ||
ab393bf1 NB |
266 | /* Given a type, apply default promotions wrt unnamed function |
267 | arguments and return the new type. */ | |
268 | ||
269 | tree | |
2f6e4e97 | 270 | c_type_promotes_to (tree type) |
ab393bf1 | 271 | { |
267bac10 | 272 | tree ret = NULL_TREE; |
ab393bf1 | 273 | |
267bac10 JM |
274 | if (TYPE_MAIN_VARIANT (type) == float_type_node) |
275 | ret = double_type_node; | |
276 | else if (c_promoting_integer_type_p (type)) | |
ab393bf1 NB |
277 | { |
278 | /* Preserve unsignedness if not really getting any wider. */ | |
8df83eae | 279 | if (TYPE_UNSIGNED (type) |
c22cacf3 | 280 | && (TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node))) |
267bac10 JM |
281 | ret = unsigned_type_node; |
282 | else | |
283 | ret = integer_type_node; | |
ab393bf1 NB |
284 | } |
285 | ||
267bac10 JM |
286 | if (ret != NULL_TREE) |
287 | return (TYPE_ATOMIC (type) | |
288 | ? c_build_qualified_type (ret, TYPE_QUAL_ATOMIC) | |
289 | : ret); | |
290 | ||
ab393bf1 NB |
291 | return type; |
292 | } | |
293 | ||
36c5e70a BE |
294 | /* Return true if between two named address spaces, whether there is a superset |
295 | named address space that encompasses both address spaces. If there is a | |
296 | superset, return which address space is the superset. */ | |
297 | ||
298 | static bool | |
299 | addr_space_superset (addr_space_t as1, addr_space_t as2, addr_space_t *common) | |
300 | { | |
301 | if (as1 == as2) | |
302 | { | |
303 | *common = as1; | |
304 | return true; | |
305 | } | |
306 | else if (targetm.addr_space.subset_p (as1, as2)) | |
307 | { | |
308 | *common = as2; | |
309 | return true; | |
310 | } | |
311 | else if (targetm.addr_space.subset_p (as2, as1)) | |
312 | { | |
313 | *common = as1; | |
314 | return true; | |
315 | } | |
316 | else | |
317 | return false; | |
318 | } | |
319 | ||
400fbf9f JW |
320 | /* Return a variant of TYPE which has all the type qualifiers of LIKE |
321 | as well as those of TYPE. */ | |
322 | ||
323 | static tree | |
2f6e4e97 | 324 | qualify_type (tree type, tree like) |
400fbf9f | 325 | { |
36c5e70a BE |
326 | addr_space_t as_type = TYPE_ADDR_SPACE (type); |
327 | addr_space_t as_like = TYPE_ADDR_SPACE (like); | |
328 | addr_space_t as_common; | |
329 | ||
330 | /* If the two named address spaces are different, determine the common | |
331 | superset address space. If there isn't one, raise an error. */ | |
332 | if (!addr_space_superset (as_type, as_like, &as_common)) | |
333 | { | |
334 | as_common = as_type; | |
335 | error ("%qT and %qT are in disjoint named address spaces", | |
336 | type, like); | |
337 | } | |
338 | ||
2f6e4e97 | 339 | return c_build_qualified_type (type, |
36c5e70a | 340 | TYPE_QUALS_NO_ADDR_SPACE (type) |
267bac10 | 341 | | TYPE_QUALS_NO_ADDR_SPACE_NO_ATOMIC (like) |
36c5e70a | 342 | | ENCODE_QUAL_ADDR_SPACE (as_common)); |
400fbf9f | 343 | } |
52ffd86e MS |
344 | |
345 | /* Return true iff the given tree T is a variable length array. */ | |
346 | ||
347 | bool | |
ac7d7749 | 348 | c_vla_type_p (const_tree t) |
52ffd86e MS |
349 | { |
350 | if (TREE_CODE (t) == ARRAY_TYPE | |
351 | && C_TYPE_VARIABLE_SIZE (t)) | |
352 | return true; | |
353 | return false; | |
354 | } | |
400fbf9f | 355 | \f |
10bc1b1b | 356 | /* Return the composite type of two compatible types. |
5305f6d7 | 357 | |
10bc1b1b JM |
358 | We assume that comptypes has already been done and returned |
359 | nonzero; if that isn't so, this may crash. In particular, we | |
360 | assume that qualifiers match. */ | |
400fbf9f JW |
361 | |
362 | tree | |
10bc1b1b | 363 | composite_type (tree t1, tree t2) |
400fbf9f | 364 | { |
b3694847 SS |
365 | enum tree_code code1; |
366 | enum tree_code code2; | |
4b027d16 | 367 | tree attributes; |
400fbf9f JW |
368 | |
369 | /* Save time if the two types are the same. */ | |
370 | ||
371 | if (t1 == t2) return t1; | |
372 | ||
373 | /* If one type is nonsense, use the other. */ | |
374 | if (t1 == error_mark_node) | |
375 | return t2; | |
376 | if (t2 == error_mark_node) | |
377 | return t1; | |
378 | ||
10bc1b1b JM |
379 | code1 = TREE_CODE (t1); |
380 | code2 = TREE_CODE (t2); | |
381 | ||
d9525bec | 382 | /* Merge the attributes. */ |
5fd9b178 | 383 | attributes = targetm.merge_type_attributes (t1, t2); |
4b027d16 | 384 | |
10bc1b1b JM |
385 | /* If one is an enumerated type and the other is the compatible |
386 | integer type, the composite type might be either of the two | |
387 | (DR#013 question 3). For consistency, use the enumerated type as | |
388 | the composite type. */ | |
400fbf9f | 389 | |
10bc1b1b JM |
390 | if (code1 == ENUMERAL_TYPE && code2 == INTEGER_TYPE) |
391 | return t1; | |
392 | if (code2 == ENUMERAL_TYPE && code1 == INTEGER_TYPE) | |
393 | return t2; | |
75326e8c | 394 | |
366de0ce | 395 | gcc_assert (code1 == code2); |
b6a10c9f | 396 | |
400fbf9f JW |
397 | switch (code1) |
398 | { | |
400fbf9f | 399 | case POINTER_TYPE: |
10bc1b1b | 400 | /* For two pointers, do this recursively on the target type. */ |
400fbf9f | 401 | { |
3932261a MM |
402 | tree pointed_to_1 = TREE_TYPE (t1); |
403 | tree pointed_to_2 = TREE_TYPE (t2); | |
10bc1b1b | 404 | tree target = composite_type (pointed_to_1, pointed_to_2); |
3db684fb | 405 | t1 = build_pointer_type_for_mode (target, TYPE_MODE (t1), false); |
fe7080d2 AP |
406 | t1 = build_type_attribute_variant (t1, attributes); |
407 | return qualify_type (t1, t2); | |
400fbf9f | 408 | } |
400fbf9f JW |
409 | |
410 | case ARRAY_TYPE: | |
411 | { | |
10bc1b1b | 412 | tree elt = composite_type (TREE_TYPE (t1), TREE_TYPE (t2)); |
46df2823 JM |
413 | int quals; |
414 | tree unqual_elt; | |
ca8bdb78 JM |
415 | tree d1 = TYPE_DOMAIN (t1); |
416 | tree d2 = TYPE_DOMAIN (t2); | |
417 | bool d1_variable, d2_variable; | |
418 | bool d1_zero, d2_zero; | |
f6294de7 | 419 | bool t1_complete, t2_complete; |
46df2823 | 420 | |
de46b2fe | 421 | /* We should not have any type quals on arrays at all. */ |
36c5e70a BE |
422 | gcc_assert (!TYPE_QUALS_NO_ADDR_SPACE (t1) |
423 | && !TYPE_QUALS_NO_ADDR_SPACE (t2)); | |
c22cacf3 | 424 | |
f6294de7 JM |
425 | t1_complete = COMPLETE_TYPE_P (t1); |
426 | t2_complete = COMPLETE_TYPE_P (t2); | |
427 | ||
3fa8871b MP |
428 | d1_zero = d1 == NULL_TREE || !TYPE_MAX_VALUE (d1); |
429 | d2_zero = d2 == NULL_TREE || !TYPE_MAX_VALUE (d2); | |
ca8bdb78 JM |
430 | |
431 | d1_variable = (!d1_zero | |
432 | && (TREE_CODE (TYPE_MIN_VALUE (d1)) != INTEGER_CST | |
433 | || TREE_CODE (TYPE_MAX_VALUE (d1)) != INTEGER_CST)); | |
434 | d2_variable = (!d2_zero | |
435 | && (TREE_CODE (TYPE_MIN_VALUE (d2)) != INTEGER_CST | |
436 | || TREE_CODE (TYPE_MAX_VALUE (d2)) != INTEGER_CST)); | |
52ffd86e MS |
437 | d1_variable = d1_variable || (d1_zero && c_vla_type_p (t1)); |
438 | d2_variable = d2_variable || (d2_zero && c_vla_type_p (t2)); | |
ca8bdb78 | 439 | |
400fbf9f | 440 | /* Save space: see if the result is identical to one of the args. */ |
ca8bdb78 JM |
441 | if (elt == TREE_TYPE (t1) && TYPE_DOMAIN (t1) |
442 | && (d2_variable || d2_zero || !d1_variable)) | |
4b027d16 | 443 | return build_type_attribute_variant (t1, attributes); |
ca8bdb78 JM |
444 | if (elt == TREE_TYPE (t2) && TYPE_DOMAIN (t2) |
445 | && (d1_variable || d1_zero || !d2_variable)) | |
4b027d16 | 446 | return build_type_attribute_variant (t2, attributes); |
c22cacf3 | 447 | |
de46b2fe AP |
448 | if (elt == TREE_TYPE (t1) && !TYPE_DOMAIN (t2) && !TYPE_DOMAIN (t1)) |
449 | return build_type_attribute_variant (t1, attributes); | |
450 | if (elt == TREE_TYPE (t2) && !TYPE_DOMAIN (t2) && !TYPE_DOMAIN (t1)) | |
451 | return build_type_attribute_variant (t2, attributes); | |
c22cacf3 | 452 | |
46df2823 JM |
453 | /* Merge the element types, and have a size if either arg has |
454 | one. We may have qualifiers on the element types. To set | |
455 | up TYPE_MAIN_VARIANT correctly, we need to form the | |
456 | composite of the unqualified types and add the qualifiers | |
457 | back at the end. */ | |
458 | quals = TYPE_QUALS (strip_array_types (elt)); | |
459 | unqual_elt = c_build_qualified_type (elt, TYPE_UNQUALIFIED); | |
460 | t1 = build_array_type (unqual_elt, | |
ca8bdb78 JM |
461 | TYPE_DOMAIN ((TYPE_DOMAIN (t1) |
462 | && (d2_variable | |
463 | || d2_zero | |
464 | || !d1_variable)) | |
465 | ? t1 | |
466 | : t2)); | |
f6294de7 JM |
467 | /* Ensure a composite type involving a zero-length array type |
468 | is a zero-length type not an incomplete type. */ | |
469 | if (d1_zero && d2_zero | |
470 | && (t1_complete || t2_complete) | |
471 | && !COMPLETE_TYPE_P (t1)) | |
472 | { | |
473 | TYPE_SIZE (t1) = bitsize_zero_node; | |
474 | TYPE_SIZE_UNIT (t1) = size_zero_node; | |
475 | } | |
46df2823 | 476 | t1 = c_build_qualified_type (t1, quals); |
de46b2fe | 477 | return build_type_attribute_variant (t1, attributes); |
400fbf9f JW |
478 | } |
479 | ||
fcb99e7b JJ |
480 | case ENUMERAL_TYPE: |
481 | case RECORD_TYPE: | |
482 | case UNION_TYPE: | |
483 | if (attributes != NULL) | |
484 | { | |
485 | /* Try harder not to create a new aggregate type. */ | |
486 | if (attribute_list_equal (TYPE_ATTRIBUTES (t1), attributes)) | |
487 | return t1; | |
488 | if (attribute_list_equal (TYPE_ATTRIBUTES (t2), attributes)) | |
489 | return t2; | |
490 | } | |
491 | return build_type_attribute_variant (t1, attributes); | |
492 | ||
400fbf9f JW |
493 | case FUNCTION_TYPE: |
494 | /* Function types: prefer the one that specified arg types. | |
495 | If both do, merge the arg types. Also merge the return types. */ | |
496 | { | |
10bc1b1b | 497 | tree valtype = composite_type (TREE_TYPE (t1), TREE_TYPE (t2)); |
400fbf9f JW |
498 | tree p1 = TYPE_ARG_TYPES (t1); |
499 | tree p2 = TYPE_ARG_TYPES (t2); | |
500 | int len; | |
501 | tree newargs, n; | |
502 | int i; | |
503 | ||
504 | /* Save space: see if the result is identical to one of the args. */ | |
3f75a254 | 505 | if (valtype == TREE_TYPE (t1) && !TYPE_ARG_TYPES (t2)) |
4b027d16 | 506 | return build_type_attribute_variant (t1, attributes); |
3f75a254 | 507 | if (valtype == TREE_TYPE (t2) && !TYPE_ARG_TYPES (t1)) |
4b027d16 | 508 | return build_type_attribute_variant (t2, attributes); |
400fbf9f JW |
509 | |
510 | /* Simple way if one arg fails to specify argument types. */ | |
3fa8871b | 511 | if (TYPE_ARG_TYPES (t1) == NULL_TREE) |
4b027d16 | 512 | { |
fe7080d2 AP |
513 | t1 = build_function_type (valtype, TYPE_ARG_TYPES (t2)); |
514 | t1 = build_type_attribute_variant (t1, attributes); | |
515 | return qualify_type (t1, t2); | |
4b027d16 | 516 | } |
3fa8871b | 517 | if (TYPE_ARG_TYPES (t2) == NULL_TREE) |
4b027d16 RK |
518 | { |
519 | t1 = build_function_type (valtype, TYPE_ARG_TYPES (t1)); | |
fe7080d2 AP |
520 | t1 = build_type_attribute_variant (t1, attributes); |
521 | return qualify_type (t1, t2); | |
4b027d16 | 522 | } |
400fbf9f JW |
523 | |
524 | /* If both args specify argument types, we must merge the two | |
525 | lists, argument by argument. */ | |
2f4e8f2b | 526 | |
fcc2b74f JJ |
527 | for (len = 0, newargs = p1; |
528 | newargs && newargs != void_list_node; | |
529 | len++, newargs = TREE_CHAIN (newargs)) | |
530 | ; | |
400fbf9f JW |
531 | |
532 | for (i = 0; i < len; i++) | |
8d9bfdc5 | 533 | newargs = tree_cons (NULL_TREE, NULL_TREE, newargs); |
400fbf9f JW |
534 | |
535 | n = newargs; | |
536 | ||
fcc2b74f | 537 | for (; p1 && p1 != void_list_node; |
400fbf9f JW |
538 | p1 = TREE_CHAIN (p1), p2 = TREE_CHAIN (p2), n = TREE_CHAIN (n)) |
539 | { | |
540 | /* A null type means arg type is not specified. | |
541 | Take whatever the other function type has. */ | |
3fa8871b | 542 | if (TREE_VALUE (p1) == NULL_TREE) |
400fbf9f JW |
543 | { |
544 | TREE_VALUE (n) = TREE_VALUE (p2); | |
545 | goto parm_done; | |
546 | } | |
3fa8871b | 547 | if (TREE_VALUE (p2) == NULL_TREE) |
400fbf9f JW |
548 | { |
549 | TREE_VALUE (n) = TREE_VALUE (p1); | |
550 | goto parm_done; | |
551 | } | |
2f6e4e97 | 552 | |
400fbf9f JW |
553 | /* Given wait (union {union wait *u; int *i} *) |
554 | and wait (union wait *), | |
555 | prefer union wait * as type of parm. */ | |
556 | if (TREE_CODE (TREE_VALUE (p1)) == UNION_TYPE | |
557 | && TREE_VALUE (p1) != TREE_VALUE (p2)) | |
558 | { | |
559 | tree memb; | |
58cb41e6 JJ |
560 | tree mv2 = TREE_VALUE (p2); |
561 | if (mv2 && mv2 != error_mark_node | |
562 | && TREE_CODE (mv2) != ARRAY_TYPE) | |
563 | mv2 = TYPE_MAIN_VARIANT (mv2); | |
400fbf9f | 564 | for (memb = TYPE_FIELDS (TREE_VALUE (p1)); |
910ad8de | 565 | memb; memb = DECL_CHAIN (memb)) |
58cb41e6 JJ |
566 | { |
567 | tree mv3 = TREE_TYPE (memb); | |
568 | if (mv3 && mv3 != error_mark_node | |
569 | && TREE_CODE (mv3) != ARRAY_TYPE) | |
570 | mv3 = TYPE_MAIN_VARIANT (mv3); | |
571 | if (comptypes (mv3, mv2)) | |
572 | { | |
573 | TREE_VALUE (n) = composite_type (TREE_TYPE (memb), | |
574 | TREE_VALUE (p2)); | |
c1771a20 | 575 | pedwarn (input_location, OPT_Wpedantic, |
fcf73884 | 576 | "function types not truly compatible in ISO C"); |
58cb41e6 JJ |
577 | goto parm_done; |
578 | } | |
579 | } | |
400fbf9f JW |
580 | } |
581 | if (TREE_CODE (TREE_VALUE (p2)) == UNION_TYPE | |
582 | && TREE_VALUE (p2) != TREE_VALUE (p1)) | |
583 | { | |
584 | tree memb; | |
58cb41e6 JJ |
585 | tree mv1 = TREE_VALUE (p1); |
586 | if (mv1 && mv1 != error_mark_node | |
587 | && TREE_CODE (mv1) != ARRAY_TYPE) | |
588 | mv1 = TYPE_MAIN_VARIANT (mv1); | |
400fbf9f | 589 | for (memb = TYPE_FIELDS (TREE_VALUE (p2)); |
910ad8de | 590 | memb; memb = DECL_CHAIN (memb)) |
58cb41e6 JJ |
591 | { |
592 | tree mv3 = TREE_TYPE (memb); | |
593 | if (mv3 && mv3 != error_mark_node | |
594 | && TREE_CODE (mv3) != ARRAY_TYPE) | |
595 | mv3 = TYPE_MAIN_VARIANT (mv3); | |
596 | if (comptypes (mv3, mv1)) | |
597 | { | |
598 | TREE_VALUE (n) = composite_type (TREE_TYPE (memb), | |
599 | TREE_VALUE (p1)); | |
c1771a20 | 600 | pedwarn (input_location, OPT_Wpedantic, |
fcf73884 | 601 | "function types not truly compatible in ISO C"); |
58cb41e6 JJ |
602 | goto parm_done; |
603 | } | |
604 | } | |
400fbf9f | 605 | } |
10bc1b1b | 606 | TREE_VALUE (n) = composite_type (TREE_VALUE (p1), TREE_VALUE (p2)); |
400fbf9f JW |
607 | parm_done: ; |
608 | } | |
609 | ||
4b027d16 | 610 | t1 = build_function_type (valtype, newargs); |
fe7080d2 | 611 | t1 = qualify_type (t1, t2); |
400fbf9f | 612 | } |
295844f6 | 613 | /* FALLTHRU */ |
400fbf9f JW |
614 | |
615 | default: | |
4b027d16 | 616 | return build_type_attribute_variant (t1, attributes); |
400fbf9f JW |
617 | } |
618 | ||
619 | } | |
10bc1b1b JM |
620 | |
621 | /* Return the type of a conditional expression between pointers to | |
622 | possibly differently qualified versions of compatible types. | |
623 | ||
624 | We assume that comp_target_types has already been done and returned | |
625 | nonzero; if that isn't so, this may crash. */ | |
626 | ||
627 | static tree | |
628 | common_pointer_type (tree t1, tree t2) | |
629 | { | |
630 | tree attributes; | |
46df2823 JM |
631 | tree pointed_to_1, mv1; |
632 | tree pointed_to_2, mv2; | |
10bc1b1b | 633 | tree target; |
eb1387a0 | 634 | unsigned target_quals; |
36c5e70a BE |
635 | addr_space_t as1, as2, as_common; |
636 | int quals1, quals2; | |
10bc1b1b JM |
637 | |
638 | /* Save time if the two types are the same. */ | |
639 | ||
640 | if (t1 == t2) return t1; | |
641 | ||
642 | /* If one type is nonsense, use the other. */ | |
643 | if (t1 == error_mark_node) | |
644 | return t2; | |
645 | if (t2 == error_mark_node) | |
646 | return t1; | |
647 | ||
366de0ce | 648 | gcc_assert (TREE_CODE (t1) == POINTER_TYPE |
c22cacf3 | 649 | && TREE_CODE (t2) == POINTER_TYPE); |
10bc1b1b JM |
650 | |
651 | /* Merge the attributes. */ | |
652 | attributes = targetm.merge_type_attributes (t1, t2); | |
653 | ||
654 | /* Find the composite type of the target types, and combine the | |
46df2823 JM |
655 | qualifiers of the two types' targets. Do not lose qualifiers on |
656 | array element types by taking the TYPE_MAIN_VARIANT. */ | |
657 | mv1 = pointed_to_1 = TREE_TYPE (t1); | |
658 | mv2 = pointed_to_2 = TREE_TYPE (t2); | |
659 | if (TREE_CODE (mv1) != ARRAY_TYPE) | |
660 | mv1 = TYPE_MAIN_VARIANT (pointed_to_1); | |
661 | if (TREE_CODE (mv2) != ARRAY_TYPE) | |
662 | mv2 = TYPE_MAIN_VARIANT (pointed_to_2); | |
663 | target = composite_type (mv1, mv2); | |
eb1387a0 | 664 | |
768952be MU |
665 | /* Strip array types to get correct qualifier for pointers to arrays */ |
666 | quals1 = TYPE_QUALS_NO_ADDR_SPACE (strip_array_types (pointed_to_1)); | |
667 | quals2 = TYPE_QUALS_NO_ADDR_SPACE (strip_array_types (pointed_to_2)); | |
668 | ||
eb1387a0 RG |
669 | /* For function types do not merge const qualifiers, but drop them |
670 | if used inconsistently. The middle-end uses these to mark const | |
671 | and noreturn functions. */ | |
672 | if (TREE_CODE (pointed_to_1) == FUNCTION_TYPE) | |
36c5e70a | 673 | target_quals = (quals1 & quals2); |
eb1387a0 | 674 | else |
36c5e70a BE |
675 | target_quals = (quals1 | quals2); |
676 | ||
677 | /* If the two named address spaces are different, determine the common | |
678 | superset address space. This is guaranteed to exist due to the | |
679 | assumption that comp_target_type returned non-zero. */ | |
680 | as1 = TYPE_ADDR_SPACE (pointed_to_1); | |
681 | as2 = TYPE_ADDR_SPACE (pointed_to_2); | |
682 | if (!addr_space_superset (as1, as2, &as_common)) | |
683 | gcc_unreachable (); | |
684 | ||
685 | target_quals |= ENCODE_QUAL_ADDR_SPACE (as_common); | |
686 | ||
eb1387a0 | 687 | t1 = build_pointer_type (c_build_qualified_type (target, target_quals)); |
10bc1b1b JM |
688 | return build_type_attribute_variant (t1, attributes); |
689 | } | |
690 | ||
691 | /* Return the common type for two arithmetic types under the usual | |
692 | arithmetic conversions. The default conversions have already been | |
693 | applied, and enumerated types converted to their compatible integer | |
694 | types. The resulting type is unqualified and has no attributes. | |
695 | ||
696 | This is the type for the result of most arithmetic operations | |
697 | if the operands have the given two types. */ | |
698 | ||
ccf7f880 JJ |
699 | static tree |
700 | c_common_type (tree t1, tree t2) | |
10bc1b1b JM |
701 | { |
702 | enum tree_code code1; | |
703 | enum tree_code code2; | |
704 | ||
705 | /* If one type is nonsense, use the other. */ | |
706 | if (t1 == error_mark_node) | |
707 | return t2; | |
708 | if (t2 == error_mark_node) | |
709 | return t1; | |
710 | ||
711 | if (TYPE_QUALS (t1) != TYPE_UNQUALIFIED) | |
712 | t1 = TYPE_MAIN_VARIANT (t1); | |
713 | ||
714 | if (TYPE_QUALS (t2) != TYPE_UNQUALIFIED) | |
715 | t2 = TYPE_MAIN_VARIANT (t2); | |
716 | ||
717 | if (TYPE_ATTRIBUTES (t1) != NULL_TREE) | |
718 | t1 = build_type_attribute_variant (t1, NULL_TREE); | |
719 | ||
720 | if (TYPE_ATTRIBUTES (t2) != NULL_TREE) | |
721 | t2 = build_type_attribute_variant (t2, NULL_TREE); | |
722 | ||
723 | /* Save time if the two types are the same. */ | |
724 | ||
725 | if (t1 == t2) return t1; | |
726 | ||
727 | code1 = TREE_CODE (t1); | |
728 | code2 = TREE_CODE (t2); | |
729 | ||
366de0ce | 730 | gcc_assert (code1 == VECTOR_TYPE || code1 == COMPLEX_TYPE |
ab22c1fa CF |
731 | || code1 == FIXED_POINT_TYPE || code1 == REAL_TYPE |
732 | || code1 == INTEGER_TYPE); | |
366de0ce | 733 | gcc_assert (code2 == VECTOR_TYPE || code2 == COMPLEX_TYPE |
ab22c1fa CF |
734 | || code2 == FIXED_POINT_TYPE || code2 == REAL_TYPE |
735 | || code2 == INTEGER_TYPE); | |
10bc1b1b | 736 | |
5fc89bfd JJ |
737 | /* When one operand is a decimal float type, the other operand cannot be |
738 | a generic float type or a complex type. We also disallow vector types | |
739 | here. */ | |
740 | if ((DECIMAL_FLOAT_TYPE_P (t1) || DECIMAL_FLOAT_TYPE_P (t2)) | |
741 | && !(DECIMAL_FLOAT_TYPE_P (t1) && DECIMAL_FLOAT_TYPE_P (t2))) | |
742 | { | |
743 | if (code1 == VECTOR_TYPE || code2 == VECTOR_TYPE) | |
744 | { | |
745 | error ("can%'t mix operands of decimal float and vector types"); | |
746 | return error_mark_node; | |
747 | } | |
748 | if (code1 == COMPLEX_TYPE || code2 == COMPLEX_TYPE) | |
749 | { | |
750 | error ("can%'t mix operands of decimal float and complex types"); | |
751 | return error_mark_node; | |
752 | } | |
753 | if (code1 == REAL_TYPE && code2 == REAL_TYPE) | |
754 | { | |
755 | error ("can%'t mix operands of decimal float and other float types"); | |
756 | return error_mark_node; | |
757 | } | |
758 | } | |
759 | ||
10bc1b1b JM |
760 | /* If one type is a vector type, return that type. (How the usual |
761 | arithmetic conversions apply to the vector types extension is not | |
762 | precisely specified.) */ | |
763 | if (code1 == VECTOR_TYPE) | |
764 | return t1; | |
765 | ||
766 | if (code2 == VECTOR_TYPE) | |
767 | return t2; | |
768 | ||
769 | /* If one type is complex, form the common type of the non-complex | |
770 | components, then make that complex. Use T1 or T2 if it is the | |
771 | required type. */ | |
772 | if (code1 == COMPLEX_TYPE || code2 == COMPLEX_TYPE) | |
773 | { | |
774 | tree subtype1 = code1 == COMPLEX_TYPE ? TREE_TYPE (t1) : t1; | |
775 | tree subtype2 = code2 == COMPLEX_TYPE ? TREE_TYPE (t2) : t2; | |
ccf7f880 | 776 | tree subtype = c_common_type (subtype1, subtype2); |
10bc1b1b JM |
777 | |
778 | if (code1 == COMPLEX_TYPE && TREE_TYPE (t1) == subtype) | |
779 | return t1; | |
780 | else if (code2 == COMPLEX_TYPE && TREE_TYPE (t2) == subtype) | |
781 | return t2; | |
782 | else | |
783 | return build_complex_type (subtype); | |
784 | } | |
785 | ||
786 | /* If only one is real, use it as the result. */ | |
787 | ||
788 | if (code1 == REAL_TYPE && code2 != REAL_TYPE) | |
789 | return t1; | |
790 | ||
791 | if (code2 == REAL_TYPE && code1 != REAL_TYPE) | |
792 | return t2; | |
793 | ||
9a8ce21f JG |
794 | /* If both are real and either are decimal floating point types, use |
795 | the decimal floating point type with the greater precision. */ | |
796 | ||
797 | if (code1 == REAL_TYPE && code2 == REAL_TYPE) | |
798 | { | |
799 | if (TYPE_MAIN_VARIANT (t1) == dfloat128_type_node | |
800 | || TYPE_MAIN_VARIANT (t2) == dfloat128_type_node) | |
801 | return dfloat128_type_node; | |
802 | else if (TYPE_MAIN_VARIANT (t1) == dfloat64_type_node | |
803 | || TYPE_MAIN_VARIANT (t2) == dfloat64_type_node) | |
804 | return dfloat64_type_node; | |
805 | else if (TYPE_MAIN_VARIANT (t1) == dfloat32_type_node | |
806 | || TYPE_MAIN_VARIANT (t2) == dfloat32_type_node) | |
807 | return dfloat32_type_node; | |
808 | } | |
809 | ||
ab22c1fa CF |
810 | /* Deal with fixed-point types. */ |
811 | if (code1 == FIXED_POINT_TYPE || code2 == FIXED_POINT_TYPE) | |
812 | { | |
813 | unsigned int unsignedp = 0, satp = 0; | |
b397965c | 814 | scalar_mode m1, m2; |
ab22c1fa CF |
815 | unsigned int fbit1, ibit1, fbit2, ibit2, max_fbit, max_ibit; |
816 | ||
b397965c RS |
817 | m1 = SCALAR_TYPE_MODE (t1); |
818 | m2 = SCALAR_TYPE_MODE (t2); | |
ab22c1fa CF |
819 | |
820 | /* If one input type is saturating, the result type is saturating. */ | |
821 | if (TYPE_SATURATING (t1) || TYPE_SATURATING (t2)) | |
822 | satp = 1; | |
823 | ||
824 | /* If both fixed-point types are unsigned, the result type is unsigned. | |
825 | When mixing fixed-point and integer types, follow the sign of the | |
826 | fixed-point type. | |
827 | Otherwise, the result type is signed. */ | |
828 | if ((TYPE_UNSIGNED (t1) && TYPE_UNSIGNED (t2) | |
829 | && code1 == FIXED_POINT_TYPE && code2 == FIXED_POINT_TYPE) | |
830 | || (code1 == FIXED_POINT_TYPE && code2 != FIXED_POINT_TYPE | |
831 | && TYPE_UNSIGNED (t1)) | |
832 | || (code1 != FIXED_POINT_TYPE && code2 == FIXED_POINT_TYPE | |
833 | && TYPE_UNSIGNED (t2))) | |
834 | unsignedp = 1; | |
835 | ||
836 | /* The result type is signed. */ | |
837 | if (unsignedp == 0) | |
838 | { | |
839 | /* If the input type is unsigned, we need to convert to the | |
840 | signed type. */ | |
841 | if (code1 == FIXED_POINT_TYPE && TYPE_UNSIGNED (t1)) | |
842 | { | |
d75d71e0 | 843 | enum mode_class mclass = (enum mode_class) 0; |
ab22c1fa CF |
844 | if (GET_MODE_CLASS (m1) == MODE_UFRACT) |
845 | mclass = MODE_FRACT; | |
846 | else if (GET_MODE_CLASS (m1) == MODE_UACCUM) | |
847 | mclass = MODE_ACCUM; | |
848 | else | |
849 | gcc_unreachable (); | |
b397965c RS |
850 | m1 = as_a <scalar_mode> |
851 | (mode_for_size (GET_MODE_PRECISION (m1), mclass, 0)); | |
ab22c1fa CF |
852 | } |
853 | if (code2 == FIXED_POINT_TYPE && TYPE_UNSIGNED (t2)) | |
854 | { | |
d75d71e0 | 855 | enum mode_class mclass = (enum mode_class) 0; |
ab22c1fa CF |
856 | if (GET_MODE_CLASS (m2) == MODE_UFRACT) |
857 | mclass = MODE_FRACT; | |
858 | else if (GET_MODE_CLASS (m2) == MODE_UACCUM) | |
859 | mclass = MODE_ACCUM; | |
860 | else | |
861 | gcc_unreachable (); | |
b397965c RS |
862 | m2 = as_a <scalar_mode> |
863 | (mode_for_size (GET_MODE_PRECISION (m2), mclass, 0)); | |
ab22c1fa CF |
864 | } |
865 | } | |
866 | ||
867 | if (code1 == FIXED_POINT_TYPE) | |
868 | { | |
869 | fbit1 = GET_MODE_FBIT (m1); | |
870 | ibit1 = GET_MODE_IBIT (m1); | |
871 | } | |
872 | else | |
873 | { | |
874 | fbit1 = 0; | |
875 | /* Signed integers need to subtract one sign bit. */ | |
876 | ibit1 = TYPE_PRECISION (t1) - (!TYPE_UNSIGNED (t1)); | |
877 | } | |
878 | ||
879 | if (code2 == FIXED_POINT_TYPE) | |
880 | { | |
881 | fbit2 = GET_MODE_FBIT (m2); | |
882 | ibit2 = GET_MODE_IBIT (m2); | |
883 | } | |
884 | else | |
885 | { | |
886 | fbit2 = 0; | |
887 | /* Signed integers need to subtract one sign bit. */ | |
888 | ibit2 = TYPE_PRECISION (t2) - (!TYPE_UNSIGNED (t2)); | |
889 | } | |
890 | ||
891 | max_ibit = ibit1 >= ibit2 ? ibit1 : ibit2; | |
892 | max_fbit = fbit1 >= fbit2 ? fbit1 : fbit2; | |
893 | return c_common_fixed_point_type_for_size (max_ibit, max_fbit, unsignedp, | |
894 | satp); | |
895 | } | |
896 | ||
10bc1b1b JM |
897 | /* Both real or both integers; use the one with greater precision. */ |
898 | ||
899 | if (TYPE_PRECISION (t1) > TYPE_PRECISION (t2)) | |
900 | return t1; | |
901 | else if (TYPE_PRECISION (t2) > TYPE_PRECISION (t1)) | |
902 | return t2; | |
903 | ||
904 | /* Same precision. Prefer long longs to longs to ints when the | |
905 | same precision, following the C99 rules on integer type rank | |
906 | (which are equivalent to the C90 rules for C90 types). */ | |
907 | ||
908 | if (TYPE_MAIN_VARIANT (t1) == long_long_unsigned_type_node | |
909 | || TYPE_MAIN_VARIANT (t2) == long_long_unsigned_type_node) | |
910 | return long_long_unsigned_type_node; | |
911 | ||
912 | if (TYPE_MAIN_VARIANT (t1) == long_long_integer_type_node | |
913 | || TYPE_MAIN_VARIANT (t2) == long_long_integer_type_node) | |
914 | { | |
915 | if (TYPE_UNSIGNED (t1) || TYPE_UNSIGNED (t2)) | |
916 | return long_long_unsigned_type_node; | |
917 | else | |
c22cacf3 | 918 | return long_long_integer_type_node; |
10bc1b1b JM |
919 | } |
920 | ||
921 | if (TYPE_MAIN_VARIANT (t1) == long_unsigned_type_node | |
922 | || TYPE_MAIN_VARIANT (t2) == long_unsigned_type_node) | |
923 | return long_unsigned_type_node; | |
924 | ||
925 | if (TYPE_MAIN_VARIANT (t1) == long_integer_type_node | |
926 | || TYPE_MAIN_VARIANT (t2) == long_integer_type_node) | |
927 | { | |
928 | /* But preserve unsignedness from the other type, | |
929 | since long cannot hold all the values of an unsigned int. */ | |
930 | if (TYPE_UNSIGNED (t1) || TYPE_UNSIGNED (t2)) | |
931 | return long_unsigned_type_node; | |
932 | else | |
933 | return long_integer_type_node; | |
934 | } | |
935 | ||
c65699ef JM |
936 | /* For floating types of the same TYPE_PRECISION (which we here |
937 | assume means either the same set of values, or sets of values | |
938 | neither a subset of the other, with behavior being undefined in | |
939 | the latter case), follow the rules from TS 18661-3: prefer | |
940 | interchange types _FloatN, then standard types long double, | |
941 | double, float, then extended types _FloatNx. For extended types, | |
942 | check them starting with _Float128x as that seems most consistent | |
943 | in spirit with preferring long double to double; for interchange | |
944 | types, also check in that order for consistency although it's not | |
945 | possible for more than one of them to have the same | |
946 | precision. */ | |
947 | tree mv1 = TYPE_MAIN_VARIANT (t1); | |
948 | tree mv2 = TYPE_MAIN_VARIANT (t2); | |
949 | ||
950 | for (int i = NUM_FLOATN_TYPES - 1; i >= 0; i--) | |
951 | if (mv1 == FLOATN_TYPE_NODE (i) || mv2 == FLOATN_TYPE_NODE (i)) | |
952 | return FLOATN_TYPE_NODE (i); | |
953 | ||
10bc1b1b | 954 | /* Likewise, prefer long double to double even if same size. */ |
c65699ef | 955 | if (mv1 == long_double_type_node || mv2 == long_double_type_node) |
10bc1b1b JM |
956 | return long_double_type_node; |
957 | ||
2531a1d9 JR |
958 | /* Likewise, prefer double to float even if same size. |
959 | We got a couple of embedded targets with 32 bit doubles, and the | |
960 | pdp11 might have 64 bit floats. */ | |
c65699ef | 961 | if (mv1 == double_type_node || mv2 == double_type_node) |
2531a1d9 JR |
962 | return double_type_node; |
963 | ||
c65699ef JM |
964 | if (mv1 == float_type_node || mv2 == float_type_node) |
965 | return float_type_node; | |
966 | ||
967 | for (int i = NUM_FLOATNX_TYPES - 1; i >= 0; i--) | |
968 | if (mv1 == FLOATNX_TYPE_NODE (i) || mv2 == FLOATNX_TYPE_NODE (i)) | |
969 | return FLOATNX_TYPE_NODE (i); | |
970 | ||
10bc1b1b JM |
971 | /* Otherwise prefer the unsigned one. */ |
972 | ||
973 | if (TYPE_UNSIGNED (t1)) | |
974 | return t1; | |
975 | else | |
976 | return t2; | |
977 | } | |
400fbf9f | 978 | \f |
5922c215 JM |
979 | /* Wrapper around c_common_type that is used by c-common.c and other |
980 | front end optimizations that remove promotions. ENUMERAL_TYPEs | |
b2232745 RS |
981 | are allowed here and are converted to their compatible integer types. |
982 | BOOLEAN_TYPEs are allowed here and return either boolean_type_node or | |
983 | preferably a non-Boolean type as the common type. */ | |
ccf7f880 JJ |
984 | tree |
985 | common_type (tree t1, tree t2) | |
986 | { | |
987 | if (TREE_CODE (t1) == ENUMERAL_TYPE) | |
988 | t1 = c_common_type_for_size (TYPE_PRECISION (t1), 1); | |
989 | if (TREE_CODE (t2) == ENUMERAL_TYPE) | |
990 | t2 = c_common_type_for_size (TYPE_PRECISION (t2), 1); | |
b2232745 RS |
991 | |
992 | /* If both types are BOOLEAN_TYPE, then return boolean_type_node. */ | |
993 | if (TREE_CODE (t1) == BOOLEAN_TYPE | |
994 | && TREE_CODE (t2) == BOOLEAN_TYPE) | |
995 | return boolean_type_node; | |
996 | ||
997 | /* If either type is BOOLEAN_TYPE, then return the other. */ | |
998 | if (TREE_CODE (t1) == BOOLEAN_TYPE) | |
999 | return t2; | |
1000 | if (TREE_CODE (t2) == BOOLEAN_TYPE) | |
1001 | return t1; | |
1002 | ||
ccf7f880 JJ |
1003 | return c_common_type (t1, t2); |
1004 | } | |
f13c9b2c | 1005 | |
400fbf9f JW |
1006 | /* Return 1 if TYPE1 and TYPE2 are compatible types for assignment |
1007 | or various other operations. Return 2 if they are compatible | |
1008 | but a warning may be needed if you use them together. */ | |
1009 | ||
1010 | int | |
132da1a5 | 1011 | comptypes (tree type1, tree type2) |
f13c9b2c AP |
1012 | { |
1013 | const struct tagged_tu_seen_cache * tagged_tu_seen_base1 = tagged_tu_seen_base; | |
1014 | int val; | |
1015 | ||
dc5027f4 | 1016 | val = comptypes_internal (type1, type2, NULL, NULL); |
744aa42f ILT |
1017 | free_all_tagged_tu_seen_up_to (tagged_tu_seen_base1); |
1018 | ||
1019 | return val; | |
1020 | } | |
1021 | ||
1022 | /* Like comptypes, but if it returns non-zero because enum and int are | |
1023 | compatible, it sets *ENUM_AND_INT_P to true. */ | |
1024 | ||
1025 | static int | |
1026 | comptypes_check_enum_int (tree type1, tree type2, bool *enum_and_int_p) | |
1027 | { | |
1028 | const struct tagged_tu_seen_cache * tagged_tu_seen_base1 = tagged_tu_seen_base; | |
1029 | int val; | |
1030 | ||
dc5027f4 JM |
1031 | val = comptypes_internal (type1, type2, enum_and_int_p, NULL); |
1032 | free_all_tagged_tu_seen_up_to (tagged_tu_seen_base1); | |
1033 | ||
1034 | return val; | |
1035 | } | |
1036 | ||
1037 | /* Like comptypes, but if it returns nonzero for different types, it | |
1038 | sets *DIFFERENT_TYPES_P to true. */ | |
1039 | ||
1040 | int | |
1041 | comptypes_check_different_types (tree type1, tree type2, | |
1042 | bool *different_types_p) | |
1043 | { | |
1044 | const struct tagged_tu_seen_cache * tagged_tu_seen_base1 = tagged_tu_seen_base; | |
1045 | int val; | |
1046 | ||
1047 | val = comptypes_internal (type1, type2, NULL, different_types_p); | |
f13c9b2c | 1048 | free_all_tagged_tu_seen_up_to (tagged_tu_seen_base1); |
c22cacf3 | 1049 | |
f13c9b2c | 1050 | return val; |
c22cacf3 MS |
1051 | } |
1052 | \f | |
f13c9b2c AP |
1053 | /* Return 1 if TYPE1 and TYPE2 are compatible types for assignment |
1054 | or various other operations. Return 2 if they are compatible | |
744aa42f ILT |
1055 | but a warning may be needed if you use them together. If |
1056 | ENUM_AND_INT_P is not NULL, and one type is an enum and the other a | |
1057 | compatible integer type, then this sets *ENUM_AND_INT_P to true; | |
dc5027f4 JM |
1058 | *ENUM_AND_INT_P is never set to false. If DIFFERENT_TYPES_P is not |
1059 | NULL, and the types are compatible but different enough not to be | |
48b0b196 | 1060 | permitted in C11 typedef redeclarations, then this sets |
dc5027f4 JM |
1061 | *DIFFERENT_TYPES_P to true; *DIFFERENT_TYPES_P is never set to |
1062 | false, but may or may not be set if the types are incompatible. | |
1063 | This differs from comptypes, in that we don't free the seen | |
1064 | types. */ | |
f13c9b2c AP |
1065 | |
1066 | static int | |
dc5027f4 JM |
1067 | comptypes_internal (const_tree type1, const_tree type2, bool *enum_and_int_p, |
1068 | bool *different_types_p) | |
400fbf9f | 1069 | { |
58f9752a KG |
1070 | const_tree t1 = type1; |
1071 | const_tree t2 = type2; | |
4b027d16 | 1072 | int attrval, val; |
400fbf9f JW |
1073 | |
1074 | /* Suppress errors caused by previously reported errors. */ | |
1075 | ||
8d47dfc5 RH |
1076 | if (t1 == t2 || !t1 || !t2 |
1077 | || TREE_CODE (t1) == ERROR_MARK || TREE_CODE (t2) == ERROR_MARK) | |
400fbf9f JW |
1078 | return 1; |
1079 | ||
bca63328 JM |
1080 | /* Enumerated types are compatible with integer types, but this is |
1081 | not transitive: two enumerated types in the same translation unit | |
1082 | are compatible with each other only if they are the same type. */ | |
400fbf9f | 1083 | |
bca63328 | 1084 | if (TREE_CODE (t1) == ENUMERAL_TYPE && TREE_CODE (t2) != ENUMERAL_TYPE) |
744aa42f ILT |
1085 | { |
1086 | t1 = c_common_type_for_size (TYPE_PRECISION (t1), TYPE_UNSIGNED (t1)); | |
dc5027f4 JM |
1087 | if (TREE_CODE (t2) != VOID_TYPE) |
1088 | { | |
1089 | if (enum_and_int_p != NULL) | |
1090 | *enum_and_int_p = true; | |
1091 | if (different_types_p != NULL) | |
1092 | *different_types_p = true; | |
1093 | } | |
744aa42f | 1094 | } |
bca63328 | 1095 | else if (TREE_CODE (t2) == ENUMERAL_TYPE && TREE_CODE (t1) != ENUMERAL_TYPE) |
744aa42f ILT |
1096 | { |
1097 | t2 = c_common_type_for_size (TYPE_PRECISION (t2), TYPE_UNSIGNED (t2)); | |
dc5027f4 JM |
1098 | if (TREE_CODE (t1) != VOID_TYPE) |
1099 | { | |
1100 | if (enum_and_int_p != NULL) | |
1101 | *enum_and_int_p = true; | |
1102 | if (different_types_p != NULL) | |
1103 | *different_types_p = true; | |
1104 | } | |
744aa42f | 1105 | } |
400fbf9f JW |
1106 | |
1107 | if (t1 == t2) | |
1108 | return 1; | |
1109 | ||
1110 | /* Different classes of types can't be compatible. */ | |
1111 | ||
3aeb3655 EC |
1112 | if (TREE_CODE (t1) != TREE_CODE (t2)) |
1113 | return 0; | |
400fbf9f | 1114 | |
118a3a8b | 1115 | /* Qualifiers must match. C99 6.7.3p9 */ |
400fbf9f | 1116 | |
3932261a | 1117 | if (TYPE_QUALS (t1) != TYPE_QUALS (t2)) |
400fbf9f JW |
1118 | return 0; |
1119 | ||
08632da2 RS |
1120 | /* Allow for two different type nodes which have essentially the same |
1121 | definition. Note that we already checked for equality of the type | |
38e01259 | 1122 | qualifiers (just above). */ |
400fbf9f | 1123 | |
46df2823 JM |
1124 | if (TREE_CODE (t1) != ARRAY_TYPE |
1125 | && TYPE_MAIN_VARIANT (t1) == TYPE_MAIN_VARIANT (t2)) | |
400fbf9f JW |
1126 | return 1; |
1127 | ||
4b027d16 | 1128 | /* 1 if no need for warning yet, 2 if warning cause has been seen. */ |
ac9a30ae | 1129 | if (!(attrval = comp_type_attributes (t1, t2))) |
4b027d16 RK |
1130 | return 0; |
1131 | ||
1132 | /* 1 if no need for warning yet, 2 if warning cause has been seen. */ | |
1133 | val = 0; | |
1134 | ||
400fbf9f JW |
1135 | switch (TREE_CODE (t1)) |
1136 | { | |
5545a907 MP |
1137 | case INTEGER_TYPE: |
1138 | case FIXED_POINT_TYPE: | |
1139 | case REAL_TYPE: | |
1140 | /* With these nodes, we can't determine type equivalence by | |
1141 | looking at what is stored in the nodes themselves, because | |
1142 | two nodes might have different TYPE_MAIN_VARIANTs but still | |
1143 | represent the same type. For example, wchar_t and int could | |
1144 | have the same properties (TYPE_PRECISION, TYPE_MIN_VALUE, | |
1145 | TYPE_MAX_VALUE, etc.), but have different TYPE_MAIN_VARIANTs | |
1146 | and are distinct types. On the other hand, int and the | |
1147 | following typedef | |
1148 | ||
1149 | typedef int INT __attribute((may_alias)); | |
1150 | ||
1151 | have identical properties, different TYPE_MAIN_VARIANTs, but | |
1152 | represent the same type. The canonical type system keeps | |
1153 | track of equivalence in this case, so we fall back on it. */ | |
1154 | return TYPE_CANONICAL (t1) == TYPE_CANONICAL (t2); | |
1155 | ||
400fbf9f | 1156 | case POINTER_TYPE: |
5545a907 MP |
1157 | /* Do not remove mode information. */ |
1158 | if (TYPE_MODE (t1) != TYPE_MODE (t2)) | |
106f5de5 | 1159 | break; |
4b027d16 | 1160 | val = (TREE_TYPE (t1) == TREE_TYPE (t2) |
744aa42f | 1161 | ? 1 : comptypes_internal (TREE_TYPE (t1), TREE_TYPE (t2), |
dc5027f4 | 1162 | enum_and_int_p, different_types_p)); |
4b027d16 | 1163 | break; |
400fbf9f JW |
1164 | |
1165 | case FUNCTION_TYPE: | |
dc5027f4 JM |
1166 | val = function_types_compatible_p (t1, t2, enum_and_int_p, |
1167 | different_types_p); | |
4b027d16 | 1168 | break; |
400fbf9f JW |
1169 | |
1170 | case ARRAY_TYPE: | |
1171 | { | |
400fbf9f JW |
1172 | tree d1 = TYPE_DOMAIN (t1); |
1173 | tree d2 = TYPE_DOMAIN (t2); | |
3f85558f RH |
1174 | bool d1_variable, d2_variable; |
1175 | bool d1_zero, d2_zero; | |
4b027d16 | 1176 | val = 1; |
400fbf9f JW |
1177 | |
1178 | /* Target types must match incl. qualifiers. */ | |
1179 | if (TREE_TYPE (t1) != TREE_TYPE (t2) | |
744aa42f | 1180 | && 0 == (val = comptypes_internal (TREE_TYPE (t1), TREE_TYPE (t2), |
dc5027f4 JM |
1181 | enum_and_int_p, |
1182 | different_types_p))) | |
400fbf9f JW |
1183 | return 0; |
1184 | ||
dc5027f4 | 1185 | if (different_types_p != NULL |
3fa8871b | 1186 | && (d1 == NULL_TREE) != (d2 == NULL_TREE)) |
dc5027f4 | 1187 | *different_types_p = true; |
400fbf9f | 1188 | /* Sizes must match unless one is missing or variable. */ |
3fa8871b | 1189 | if (d1 == NULL_TREE || d2 == NULL_TREE || d1 == d2) |
4b027d16 | 1190 | break; |
400fbf9f | 1191 | |
3f75a254 JM |
1192 | d1_zero = !TYPE_MAX_VALUE (d1); |
1193 | d2_zero = !TYPE_MAX_VALUE (d2); | |
3f85558f | 1194 | |
3f75a254 | 1195 | d1_variable = (!d1_zero |
3f85558f RH |
1196 | && (TREE_CODE (TYPE_MIN_VALUE (d1)) != INTEGER_CST |
1197 | || TREE_CODE (TYPE_MAX_VALUE (d1)) != INTEGER_CST)); | |
3f75a254 | 1198 | d2_variable = (!d2_zero |
3f85558f RH |
1199 | && (TREE_CODE (TYPE_MIN_VALUE (d2)) != INTEGER_CST |
1200 | || TREE_CODE (TYPE_MAX_VALUE (d2)) != INTEGER_CST)); | |
52ffd86e MS |
1201 | d1_variable = d1_variable || (d1_zero && c_vla_type_p (t1)); |
1202 | d2_variable = d2_variable || (d2_zero && c_vla_type_p (t2)); | |
3f85558f | 1203 | |
dc5027f4 JM |
1204 | if (different_types_p != NULL |
1205 | && d1_variable != d2_variable) | |
1206 | *different_types_p = true; | |
3f85558f RH |
1207 | if (d1_variable || d2_variable) |
1208 | break; | |
1209 | if (d1_zero && d2_zero) | |
1210 | break; | |
1211 | if (d1_zero || d2_zero | |
3f75a254 JM |
1212 | || !tree_int_cst_equal (TYPE_MIN_VALUE (d1), TYPE_MIN_VALUE (d2)) |
1213 | || !tree_int_cst_equal (TYPE_MAX_VALUE (d1), TYPE_MAX_VALUE (d2))) | |
05bccae2 RK |
1214 | val = 0; |
1215 | ||
c22cacf3 | 1216 | break; |
400fbf9f JW |
1217 | } |
1218 | ||
d1bd0ded | 1219 | case ENUMERAL_TYPE: |
58393038 | 1220 | case RECORD_TYPE: |
d1bd0ded | 1221 | case UNION_TYPE: |
766beae1 | 1222 | if (val != 1 && !same_translation_unit_p (t1, t2)) |
c22cacf3 | 1223 | { |
fcb99e7b JJ |
1224 | tree a1 = TYPE_ATTRIBUTES (t1); |
1225 | tree a2 = TYPE_ATTRIBUTES (t2); | |
1226 | ||
1227 | if (! attribute_list_contained (a1, a2) | |
1228 | && ! attribute_list_contained (a2, a1)) | |
1229 | break; | |
1230 | ||
f13c9b2c | 1231 | if (attrval != 2) |
dc5027f4 JM |
1232 | return tagged_types_tu_compatible_p (t1, t2, enum_and_int_p, |
1233 | different_types_p); | |
1234 | val = tagged_types_tu_compatible_p (t1, t2, enum_and_int_p, | |
1235 | different_types_p); | |
f13c9b2c | 1236 | } |
4b027d16 | 1237 | break; |
e9a25f70 | 1238 | |
62e1dfcf | 1239 | case VECTOR_TYPE: |
744aa42f ILT |
1240 | val = (TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2) |
1241 | && comptypes_internal (TREE_TYPE (t1), TREE_TYPE (t2), | |
dc5027f4 | 1242 | enum_and_int_p, different_types_p)); |
62e1dfcf NC |
1243 | break; |
1244 | ||
e9a25f70 JL |
1245 | default: |
1246 | break; | |
400fbf9f | 1247 | } |
4b027d16 | 1248 | return attrval == 2 && val == 1 ? 2 : val; |
400fbf9f JW |
1249 | } |
1250 | ||
36c5e70a BE |
1251 | /* Return 1 if TTL and TTR are pointers to types that are equivalent, ignoring |
1252 | their qualifiers, except for named address spaces. If the pointers point to | |
1253 | different named addresses, then we must determine if one address space is a | |
1254 | subset of the other. */ | |
400fbf9f JW |
1255 | |
1256 | static int | |
744aa42f | 1257 | comp_target_types (location_t location, tree ttl, tree ttr) |
400fbf9f | 1258 | { |
392202b0 | 1259 | int val; |
768952be | 1260 | int val_ped; |
36c5e70a BE |
1261 | tree mvl = TREE_TYPE (ttl); |
1262 | tree mvr = TREE_TYPE (ttr); | |
1263 | addr_space_t asl = TYPE_ADDR_SPACE (mvl); | |
1264 | addr_space_t asr = TYPE_ADDR_SPACE (mvr); | |
1265 | addr_space_t as_common; | |
744aa42f | 1266 | bool enum_and_int_p; |
8b40563c | 1267 | |
36c5e70a BE |
1268 | /* Fail if pointers point to incompatible address spaces. */ |
1269 | if (!addr_space_superset (asl, asr, &as_common)) | |
1270 | return 0; | |
1271 | ||
768952be MU |
1272 | /* For pedantic record result of comptypes on arrays before losing |
1273 | qualifiers on the element type below. */ | |
1274 | val_ped = 1; | |
1275 | ||
1276 | if (TREE_CODE (mvl) == ARRAY_TYPE | |
1277 | && TREE_CODE (mvr) == ARRAY_TYPE) | |
1278 | val_ped = comptypes (mvl, mvr); | |
1279 | ||
1280 | /* Qualifiers on element types of array types that are | |
1281 | pointer targets are lost by taking their TYPE_MAIN_VARIANT. */ | |
1282 | ||
1283 | mvl = (TYPE_ATOMIC (strip_array_types (mvl)) | |
1284 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (mvl), TYPE_QUAL_ATOMIC) | |
1285 | : TYPE_MAIN_VARIANT (mvl)); | |
1286 | ||
1287 | mvr = (TYPE_ATOMIC (strip_array_types (mvr)) | |
1288 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (mvr), TYPE_QUAL_ATOMIC) | |
1289 | : TYPE_MAIN_VARIANT (mvr)); | |
1290 | ||
744aa42f ILT |
1291 | enum_and_int_p = false; |
1292 | val = comptypes_check_enum_int (mvl, mvr, &enum_and_int_p); | |
8b40563c | 1293 | |
768952be MU |
1294 | if (val == 1 && val_ped != 1) |
1295 | pedwarn (location, OPT_Wpedantic, "pointers to arrays with different qualifiers " | |
1296 | "are incompatible in ISO C"); | |
1297 | ||
fcf73884 | 1298 | if (val == 2) |
c1771a20 | 1299 | pedwarn (location, OPT_Wpedantic, "types are not quite compatible"); |
744aa42f ILT |
1300 | |
1301 | if (val == 1 && enum_and_int_p && warn_cxx_compat) | |
1302 | warning_at (location, OPT_Wc___compat, | |
1303 | "pointer target types incompatible in C++"); | |
1304 | ||
400fbf9f JW |
1305 | return val; |
1306 | } | |
1307 | \f | |
1308 | /* Subroutines of `comptypes'. */ | |
1309 | ||
f75fbaf7 ZW |
1310 | /* Determine whether two trees derive from the same translation unit. |
1311 | If the CONTEXT chain ends in a null, that tree's context is still | |
1312 | being parsed, so if two trees have context chains ending in null, | |
766beae1 | 1313 | they're in the same translation unit. */ |
e3455240 MP |
1314 | |
1315 | bool | |
58f9752a | 1316 | same_translation_unit_p (const_tree t1, const_tree t2) |
766beae1 ZW |
1317 | { |
1318 | while (t1 && TREE_CODE (t1) != TRANSLATION_UNIT_DECL) | |
1319 | switch (TREE_CODE_CLASS (TREE_CODE (t1))) | |
1320 | { | |
6615c446 JO |
1321 | case tcc_declaration: |
1322 | t1 = DECL_CONTEXT (t1); break; | |
1323 | case tcc_type: | |
1324 | t1 = TYPE_CONTEXT (t1); break; | |
1325 | case tcc_exceptional: | |
1326 | t1 = BLOCK_SUPERCONTEXT (t1); break; /* assume block */ | |
366de0ce | 1327 | default: gcc_unreachable (); |
766beae1 ZW |
1328 | } |
1329 | ||
1330 | while (t2 && TREE_CODE (t2) != TRANSLATION_UNIT_DECL) | |
1331 | switch (TREE_CODE_CLASS (TREE_CODE (t2))) | |
1332 | { | |
6615c446 JO |
1333 | case tcc_declaration: |
1334 | t2 = DECL_CONTEXT (t2); break; | |
1335 | case tcc_type: | |
1336 | t2 = TYPE_CONTEXT (t2); break; | |
1337 | case tcc_exceptional: | |
1338 | t2 = BLOCK_SUPERCONTEXT (t2); break; /* assume block */ | |
366de0ce | 1339 | default: gcc_unreachable (); |
766beae1 ZW |
1340 | } |
1341 | ||
1342 | return t1 == t2; | |
1343 | } | |
1344 | ||
f13c9b2c | 1345 | /* Allocate the seen two types, assuming that they are compatible. */ |
d1bd0ded | 1346 | |
f13c9b2c | 1347 | static struct tagged_tu_seen_cache * |
58f9752a | 1348 | alloc_tagged_tu_seen_cache (const_tree t1, const_tree t2) |
f13c9b2c | 1349 | { |
cceb1885 | 1350 | struct tagged_tu_seen_cache *tu = XNEW (struct tagged_tu_seen_cache); |
f13c9b2c AP |
1351 | tu->next = tagged_tu_seen_base; |
1352 | tu->t1 = t1; | |
1353 | tu->t2 = t2; | |
c22cacf3 | 1354 | |
f13c9b2c | 1355 | tagged_tu_seen_base = tu; |
c22cacf3 | 1356 | |
f13c9b2c AP |
1357 | /* The C standard says that two structures in different translation |
1358 | units are compatible with each other only if the types of their | |
1359 | fields are compatible (among other things). We assume that they | |
1360 | are compatible until proven otherwise when building the cache. | |
1361 | An example where this can occur is: | |
1362 | struct a | |
1363 | { | |
1364 | struct a *next; | |
1365 | }; | |
1366 | If we are comparing this against a similar struct in another TU, | |
c83eecad | 1367 | and did not assume they were compatible, we end up with an infinite |
f13c9b2c AP |
1368 | loop. */ |
1369 | tu->val = 1; | |
1370 | return tu; | |
1371 | } | |
d1bd0ded | 1372 | |
f13c9b2c | 1373 | /* Free the seen types until we get to TU_TIL. */ |
d1bd0ded | 1374 | |
f13c9b2c AP |
1375 | static void |
1376 | free_all_tagged_tu_seen_up_to (const struct tagged_tu_seen_cache *tu_til) | |
1377 | { | |
1378 | const struct tagged_tu_seen_cache *tu = tagged_tu_seen_base; | |
1379 | while (tu != tu_til) | |
1380 | { | |
741ac903 KG |
1381 | const struct tagged_tu_seen_cache *const tu1 |
1382 | = (const struct tagged_tu_seen_cache *) tu; | |
f13c9b2c | 1383 | tu = tu1->next; |
b1d5455a | 1384 | free (CONST_CAST (struct tagged_tu_seen_cache *, tu1)); |
f13c9b2c AP |
1385 | } |
1386 | tagged_tu_seen_base = tu_til; | |
1387 | } | |
d1bd0ded GK |
1388 | |
1389 | /* Return 1 if two 'struct', 'union', or 'enum' types T1 and T2 are | |
1390 | compatible. If the two types are not the same (which has been | |
1391 | checked earlier), this can only happen when multiple translation | |
1392 | units are being compiled. See C99 6.2.7 paragraph 1 for the exact | |
dc5027f4 JM |
1393 | rules. ENUM_AND_INT_P and DIFFERENT_TYPES_P are as in |
1394 | comptypes_internal. */ | |
d1bd0ded GK |
1395 | |
1396 | static int | |
744aa42f | 1397 | tagged_types_tu_compatible_p (const_tree t1, const_tree t2, |
dc5027f4 | 1398 | bool *enum_and_int_p, bool *different_types_p) |
d1bd0ded GK |
1399 | { |
1400 | tree s1, s2; | |
1401 | bool needs_warning = false; | |
3aeb3655 | 1402 | |
d1bd0ded GK |
1403 | /* We have to verify that the tags of the types are the same. This |
1404 | is harder than it looks because this may be a typedef, so we have | |
1405 | to go look at the original type. It may even be a typedef of a | |
6de9cd9a DN |
1406 | typedef... |
1407 | In the case of compiler-created builtin structs the TYPE_DECL | |
1408 | may be a dummy, with no DECL_ORIGINAL_TYPE. Don't fault. */ | |
dea984dc ILT |
1409 | while (TYPE_NAME (t1) |
1410 | && TREE_CODE (TYPE_NAME (t1)) == TYPE_DECL | |
1411 | && DECL_ORIGINAL_TYPE (TYPE_NAME (t1))) | |
d1bd0ded GK |
1412 | t1 = DECL_ORIGINAL_TYPE (TYPE_NAME (t1)); |
1413 | ||
dea984dc ILT |
1414 | while (TYPE_NAME (t2) |
1415 | && TREE_CODE (TYPE_NAME (t2)) == TYPE_DECL | |
1416 | && DECL_ORIGINAL_TYPE (TYPE_NAME (t2))) | |
d1bd0ded GK |
1417 | t2 = DECL_ORIGINAL_TYPE (TYPE_NAME (t2)); |
1418 | ||
1419 | /* C90 didn't have the requirement that the two tags be the same. */ | |
1420 | if (flag_isoc99 && TYPE_NAME (t1) != TYPE_NAME (t2)) | |
1421 | return 0; | |
3aeb3655 | 1422 | |
d1bd0ded GK |
1423 | /* C90 didn't say what happened if one or both of the types were |
1424 | incomplete; we choose to follow C99 rules here, which is that they | |
1425 | are compatible. */ | |
1426 | if (TYPE_SIZE (t1) == NULL | |
1427 | || TYPE_SIZE (t2) == NULL) | |
1428 | return 1; | |
3aeb3655 | 1429 | |
d1bd0ded | 1430 | { |
f13c9b2c | 1431 | const struct tagged_tu_seen_cache * tts_i; |
d1bd0ded GK |
1432 | for (tts_i = tagged_tu_seen_base; tts_i != NULL; tts_i = tts_i->next) |
1433 | if (tts_i->t1 == t1 && tts_i->t2 == t2) | |
f13c9b2c | 1434 | return tts_i->val; |
d1bd0ded | 1435 | } |
3aeb3655 | 1436 | |
d1bd0ded GK |
1437 | switch (TREE_CODE (t1)) |
1438 | { | |
1439 | case ENUMERAL_TYPE: | |
1440 | { | |
f13c9b2c | 1441 | struct tagged_tu_seen_cache *tu = alloc_tagged_tu_seen_cache (t1, t2); |
c22cacf3 MS |
1442 | /* Speed up the case where the type values are in the same order. */ |
1443 | tree tv1 = TYPE_VALUES (t1); | |
1444 | tree tv2 = TYPE_VALUES (t2); | |
3aeb3655 | 1445 | |
c22cacf3 | 1446 | if (tv1 == tv2) |
f13c9b2c AP |
1447 | { |
1448 | return 1; | |
1449 | } | |
3aeb3655 | 1450 | |
c22cacf3 MS |
1451 | for (;tv1 && tv2; tv1 = TREE_CHAIN (tv1), tv2 = TREE_CHAIN (tv2)) |
1452 | { | |
1453 | if (TREE_PURPOSE (tv1) != TREE_PURPOSE (tv2)) | |
1454 | break; | |
1455 | if (simple_cst_equal (TREE_VALUE (tv1), TREE_VALUE (tv2)) != 1) | |
f13c9b2c | 1456 | { |
c22cacf3 | 1457 | tu->val = 0; |
f13c9b2c AP |
1458 | return 0; |
1459 | } | |
c22cacf3 | 1460 | } |
3aeb3655 | 1461 | |
c22cacf3 | 1462 | if (tv1 == NULL_TREE && tv2 == NULL_TREE) |
f13c9b2c AP |
1463 | { |
1464 | return 1; | |
1465 | } | |
c22cacf3 | 1466 | if (tv1 == NULL_TREE || tv2 == NULL_TREE) |
f13c9b2c AP |
1467 | { |
1468 | tu->val = 0; | |
1469 | return 0; | |
1470 | } | |
3aeb3655 | 1471 | |
d1bd0ded | 1472 | if (list_length (TYPE_VALUES (t1)) != list_length (TYPE_VALUES (t2))) |
f13c9b2c AP |
1473 | { |
1474 | tu->val = 0; | |
1475 | return 0; | |
1476 | } | |
3aeb3655 | 1477 | |
d1bd0ded GK |
1478 | for (s1 = TYPE_VALUES (t1); s1; s1 = TREE_CHAIN (s1)) |
1479 | { | |
1480 | s2 = purpose_member (TREE_PURPOSE (s1), TYPE_VALUES (t2)); | |
1481 | if (s2 == NULL | |
1482 | || simple_cst_equal (TREE_VALUE (s1), TREE_VALUE (s2)) != 1) | |
f13c9b2c AP |
1483 | { |
1484 | tu->val = 0; | |
1485 | return 0; | |
1486 | } | |
d1bd0ded GK |
1487 | } |
1488 | return 1; | |
1489 | } | |
1490 | ||
1491 | case UNION_TYPE: | |
1492 | { | |
f13c9b2c | 1493 | struct tagged_tu_seen_cache *tu = alloc_tagged_tu_seen_cache (t1, t2); |
d1bd0ded | 1494 | if (list_length (TYPE_FIELDS (t1)) != list_length (TYPE_FIELDS (t2))) |
f13c9b2c AP |
1495 | { |
1496 | tu->val = 0; | |
1497 | return 0; | |
1498 | } | |
c22cacf3 | 1499 | |
f13c9b2c AP |
1500 | /* Speed up the common case where the fields are in the same order. */ |
1501 | for (s1 = TYPE_FIELDS (t1), s2 = TYPE_FIELDS (t2); s1 && s2; | |
910ad8de | 1502 | s1 = DECL_CHAIN (s1), s2 = DECL_CHAIN (s2)) |
f13c9b2c AP |
1503 | { |
1504 | int result; | |
c22cacf3 | 1505 | |
3ae4d3cc | 1506 | if (DECL_NAME (s1) != DECL_NAME (s2)) |
f13c9b2c | 1507 | break; |
744aa42f | 1508 | result = comptypes_internal (TREE_TYPE (s1), TREE_TYPE (s2), |
dc5027f4 | 1509 | enum_and_int_p, different_types_p); |
3ae4d3cc AO |
1510 | |
1511 | if (result != 1 && !DECL_NAME (s1)) | |
1512 | break; | |
f13c9b2c AP |
1513 | if (result == 0) |
1514 | { | |
1515 | tu->val = 0; | |
1516 | return 0; | |
1517 | } | |
1518 | if (result == 2) | |
1519 | needs_warning = true; | |
1520 | ||
1521 | if (TREE_CODE (s1) == FIELD_DECL | |
1522 | && simple_cst_equal (DECL_FIELD_BIT_OFFSET (s1), | |
1523 | DECL_FIELD_BIT_OFFSET (s2)) != 1) | |
1524 | { | |
1525 | tu->val = 0; | |
1526 | return 0; | |
1527 | } | |
1528 | } | |
1529 | if (!s1 && !s2) | |
1530 | { | |
1531 | tu->val = needs_warning ? 2 : 1; | |
1532 | return tu->val; | |
1533 | } | |
d1bd0ded | 1534 | |
910ad8de | 1535 | for (s1 = TYPE_FIELDS (t1); s1; s1 = DECL_CHAIN (s1)) |
d1bd0ded GK |
1536 | { |
1537 | bool ok = false; | |
3aeb3655 | 1538 | |
910ad8de | 1539 | for (s2 = TYPE_FIELDS (t2); s2; s2 = DECL_CHAIN (s2)) |
3ae4d3cc AO |
1540 | if (DECL_NAME (s1) == DECL_NAME (s2)) |
1541 | { | |
1542 | int result; | |
1543 | ||
744aa42f | 1544 | result = comptypes_internal (TREE_TYPE (s1), TREE_TYPE (s2), |
dc5027f4 JM |
1545 | enum_and_int_p, |
1546 | different_types_p); | |
3ae4d3cc AO |
1547 | |
1548 | if (result != 1 && !DECL_NAME (s1)) | |
1549 | continue; | |
1550 | if (result == 0) | |
1551 | { | |
1552 | tu->val = 0; | |
1553 | return 0; | |
1554 | } | |
1555 | if (result == 2) | |
1556 | needs_warning = true; | |
1557 | ||
1558 | if (TREE_CODE (s1) == FIELD_DECL | |
1559 | && simple_cst_equal (DECL_FIELD_BIT_OFFSET (s1), | |
1560 | DECL_FIELD_BIT_OFFSET (s2)) != 1) | |
d1bd0ded | 1561 | break; |
3ae4d3cc AO |
1562 | |
1563 | ok = true; | |
1564 | break; | |
1565 | } | |
3f75a254 | 1566 | if (!ok) |
f13c9b2c AP |
1567 | { |
1568 | tu->val = 0; | |
1569 | return 0; | |
1570 | } | |
d1bd0ded | 1571 | } |
f13c9b2c AP |
1572 | tu->val = needs_warning ? 2 : 10; |
1573 | return tu->val; | |
d1bd0ded GK |
1574 | } |
1575 | ||
1576 | case RECORD_TYPE: | |
1577 | { | |
c22cacf3 | 1578 | struct tagged_tu_seen_cache *tu = alloc_tagged_tu_seen_cache (t1, t2); |
3aeb3655 EC |
1579 | |
1580 | for (s1 = TYPE_FIELDS (t1), s2 = TYPE_FIELDS (t2); | |
d1bd0ded | 1581 | s1 && s2; |
910ad8de | 1582 | s1 = DECL_CHAIN (s1), s2 = DECL_CHAIN (s2)) |
d1bd0ded GK |
1583 | { |
1584 | int result; | |
1585 | if (TREE_CODE (s1) != TREE_CODE (s2) | |
1586 | || DECL_NAME (s1) != DECL_NAME (s2)) | |
1587 | break; | |
744aa42f | 1588 | result = comptypes_internal (TREE_TYPE (s1), TREE_TYPE (s2), |
dc5027f4 | 1589 | enum_and_int_p, different_types_p); |
d1bd0ded GK |
1590 | if (result == 0) |
1591 | break; | |
1592 | if (result == 2) | |
1593 | needs_warning = true; | |
3aeb3655 | 1594 | |
d1bd0ded GK |
1595 | if (TREE_CODE (s1) == FIELD_DECL |
1596 | && simple_cst_equal (DECL_FIELD_BIT_OFFSET (s1), | |
1597 | DECL_FIELD_BIT_OFFSET (s2)) != 1) | |
1598 | break; | |
1599 | } | |
d1bd0ded | 1600 | if (s1 && s2) |
f13c9b2c AP |
1601 | tu->val = 0; |
1602 | else | |
1603 | tu->val = needs_warning ? 2 : 1; | |
1604 | return tu->val; | |
d1bd0ded GK |
1605 | } |
1606 | ||
1607 | default: | |
366de0ce | 1608 | gcc_unreachable (); |
d1bd0ded GK |
1609 | } |
1610 | } | |
1611 | ||
400fbf9f JW |
1612 | /* Return 1 if two function types F1 and F2 are compatible. |
1613 | If either type specifies no argument types, | |
1614 | the other must specify a fixed number of self-promoting arg types. | |
2f6e4e97 | 1615 | Otherwise, if one type specifies only the number of arguments, |
400fbf9f | 1616 | the other must specify that number of self-promoting arg types. |
744aa42f | 1617 | Otherwise, the argument types must match. |
dc5027f4 | 1618 | ENUM_AND_INT_P and DIFFERENT_TYPES_P are as in comptypes_internal. */ |
400fbf9f JW |
1619 | |
1620 | static int | |
744aa42f | 1621 | function_types_compatible_p (const_tree f1, const_tree f2, |
dc5027f4 | 1622 | bool *enum_and_int_p, bool *different_types_p) |
400fbf9f JW |
1623 | { |
1624 | tree args1, args2; | |
1625 | /* 1 if no need for warning yet, 2 if warning cause has been seen. */ | |
1626 | int val = 1; | |
1627 | int val1; | |
a6fdc086 GK |
1628 | tree ret1, ret2; |
1629 | ||
1630 | ret1 = TREE_TYPE (f1); | |
1631 | ret2 = TREE_TYPE (f2); | |
1632 | ||
e508a019 JM |
1633 | /* 'volatile' qualifiers on a function's return type used to mean |
1634 | the function is noreturn. */ | |
1635 | if (TYPE_VOLATILE (ret1) != TYPE_VOLATILE (ret2)) | |
509c9d60 | 1636 | pedwarn (input_location, 0, "function return types not compatible due to %<volatile%>"); |
a6fdc086 GK |
1637 | if (TYPE_VOLATILE (ret1)) |
1638 | ret1 = build_qualified_type (TYPE_MAIN_VARIANT (ret1), | |
1639 | TYPE_QUALS (ret1) & ~TYPE_QUAL_VOLATILE); | |
1640 | if (TYPE_VOLATILE (ret2)) | |
1641 | ret2 = build_qualified_type (TYPE_MAIN_VARIANT (ret2), | |
1642 | TYPE_QUALS (ret2) & ~TYPE_QUAL_VOLATILE); | |
dc5027f4 | 1643 | val = comptypes_internal (ret1, ret2, enum_and_int_p, different_types_p); |
a6fdc086 | 1644 | if (val == 0) |
400fbf9f JW |
1645 | return 0; |
1646 | ||
1647 | args1 = TYPE_ARG_TYPES (f1); | |
1648 | args2 = TYPE_ARG_TYPES (f2); | |
1649 | ||
dc5027f4 | 1650 | if (different_types_p != NULL |
3fa8871b | 1651 | && (args1 == NULL_TREE) != (args2 == NULL_TREE)) |
dc5027f4 JM |
1652 | *different_types_p = true; |
1653 | ||
400fbf9f JW |
1654 | /* An unspecified parmlist matches any specified parmlist |
1655 | whose argument types don't need default promotions. */ | |
1656 | ||
3fa8871b | 1657 | if (args1 == NULL_TREE) |
400fbf9f JW |
1658 | { |
1659 | if (!self_promoting_args_p (args2)) | |
1660 | return 0; | |
1661 | /* If one of these types comes from a non-prototype fn definition, | |
1662 | compare that with the other type's arglist. | |
3176a0c2 | 1663 | If they don't match, ask for a warning (but no error). */ |
400fbf9f | 1664 | if (TYPE_ACTUAL_ARG_TYPES (f1) |
744aa42f | 1665 | && 1 != type_lists_compatible_p (args2, TYPE_ACTUAL_ARG_TYPES (f1), |
dc5027f4 | 1666 | enum_and_int_p, different_types_p)) |
400fbf9f JW |
1667 | val = 2; |
1668 | return val; | |
1669 | } | |
3fa8871b | 1670 | if (args2 == NULL_TREE) |
400fbf9f JW |
1671 | { |
1672 | if (!self_promoting_args_p (args1)) | |
1673 | return 0; | |
1674 | if (TYPE_ACTUAL_ARG_TYPES (f2) | |
744aa42f | 1675 | && 1 != type_lists_compatible_p (args1, TYPE_ACTUAL_ARG_TYPES (f2), |
dc5027f4 | 1676 | enum_and_int_p, different_types_p)) |
400fbf9f JW |
1677 | val = 2; |
1678 | return val; | |
1679 | } | |
1680 | ||
1681 | /* Both types have argument lists: compare them and propagate results. */ | |
dc5027f4 JM |
1682 | val1 = type_lists_compatible_p (args1, args2, enum_and_int_p, |
1683 | different_types_p); | |
400fbf9f JW |
1684 | return val1 != 1 ? val1 : val; |
1685 | } | |
1686 | ||
744aa42f ILT |
1687 | /* Check two lists of types for compatibility, returning 0 for |
1688 | incompatible, 1 for compatible, or 2 for compatible with | |
dc5027f4 JM |
1689 | warning. ENUM_AND_INT_P and DIFFERENT_TYPES_P are as in |
1690 | comptypes_internal. */ | |
400fbf9f JW |
1691 | |
1692 | static int | |
744aa42f | 1693 | type_lists_compatible_p (const_tree args1, const_tree args2, |
dc5027f4 | 1694 | bool *enum_and_int_p, bool *different_types_p) |
400fbf9f JW |
1695 | { |
1696 | /* 1 if no need for warning yet, 2 if warning cause has been seen. */ | |
1697 | int val = 1; | |
9d5f3e49 | 1698 | int newval = 0; |
400fbf9f JW |
1699 | |
1700 | while (1) | |
1701 | { | |
46df2823 | 1702 | tree a1, mv1, a2, mv2; |
3fa8871b | 1703 | if (args1 == NULL_TREE && args2 == NULL_TREE) |
400fbf9f JW |
1704 | return val; |
1705 | /* If one list is shorter than the other, | |
1706 | they fail to match. */ | |
3fa8871b | 1707 | if (args1 == NULL_TREE || args2 == NULL_TREE) |
400fbf9f | 1708 | return 0; |
46df2823 JM |
1709 | mv1 = a1 = TREE_VALUE (args1); |
1710 | mv2 = a2 = TREE_VALUE (args2); | |
1711 | if (mv1 && mv1 != error_mark_node && TREE_CODE (mv1) != ARRAY_TYPE) | |
267bac10 JM |
1712 | mv1 = (TYPE_ATOMIC (mv1) |
1713 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (mv1), | |
1714 | TYPE_QUAL_ATOMIC) | |
1715 | : TYPE_MAIN_VARIANT (mv1)); | |
46df2823 | 1716 | if (mv2 && mv2 != error_mark_node && TREE_CODE (mv2) != ARRAY_TYPE) |
267bac10 JM |
1717 | mv2 = (TYPE_ATOMIC (mv2) |
1718 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (mv2), | |
1719 | TYPE_QUAL_ATOMIC) | |
1720 | : TYPE_MAIN_VARIANT (mv2)); | |
400fbf9f JW |
1721 | /* A null pointer instead of a type |
1722 | means there is supposed to be an argument | |
1723 | but nothing is specified about what type it has. | |
1724 | So match anything that self-promotes. */ | |
dc5027f4 | 1725 | if (different_types_p != NULL |
3fa8871b | 1726 | && (a1 == NULL_TREE) != (a2 == NULL_TREE)) |
dc5027f4 | 1727 | *different_types_p = true; |
3fa8871b | 1728 | if (a1 == NULL_TREE) |
400fbf9f | 1729 | { |
46df2823 | 1730 | if (c_type_promotes_to (a2) != a2) |
400fbf9f JW |
1731 | return 0; |
1732 | } | |
3fa8871b | 1733 | else if (a2 == NULL_TREE) |
400fbf9f | 1734 | { |
46df2823 | 1735 | if (c_type_promotes_to (a1) != a1) |
400fbf9f JW |
1736 | return 0; |
1737 | } | |
8f5b6d29 | 1738 | /* If one of the lists has an error marker, ignore this arg. */ |
46df2823 JM |
1739 | else if (TREE_CODE (a1) == ERROR_MARK |
1740 | || TREE_CODE (a2) == ERROR_MARK) | |
8f5b6d29 | 1741 | ; |
dc5027f4 JM |
1742 | else if (!(newval = comptypes_internal (mv1, mv2, enum_and_int_p, |
1743 | different_types_p))) | |
400fbf9f | 1744 | { |
dc5027f4 JM |
1745 | if (different_types_p != NULL) |
1746 | *different_types_p = true; | |
400fbf9f JW |
1747 | /* Allow wait (union {union wait *u; int *i} *) |
1748 | and wait (union wait *) to be compatible. */ | |
46df2823 | 1749 | if (TREE_CODE (a1) == UNION_TYPE |
3fa8871b | 1750 | && (TYPE_NAME (a1) == NULL_TREE |
ebf0bf7f | 1751 | || TYPE_TRANSPARENT_AGGR (a1)) |
46df2823 JM |
1752 | && TREE_CODE (TYPE_SIZE (a1)) == INTEGER_CST |
1753 | && tree_int_cst_equal (TYPE_SIZE (a1), | |
1754 | TYPE_SIZE (a2))) | |
400fbf9f JW |
1755 | { |
1756 | tree memb; | |
46df2823 | 1757 | for (memb = TYPE_FIELDS (a1); |
910ad8de | 1758 | memb; memb = DECL_CHAIN (memb)) |
58cb41e6 JJ |
1759 | { |
1760 | tree mv3 = TREE_TYPE (memb); | |
1761 | if (mv3 && mv3 != error_mark_node | |
1762 | && TREE_CODE (mv3) != ARRAY_TYPE) | |
267bac10 JM |
1763 | mv3 = (TYPE_ATOMIC (mv3) |
1764 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (mv3), | |
1765 | TYPE_QUAL_ATOMIC) | |
1766 | : TYPE_MAIN_VARIANT (mv3)); | |
dc5027f4 JM |
1767 | if (comptypes_internal (mv3, mv2, enum_and_int_p, |
1768 | different_types_p)) | |
58cb41e6 JJ |
1769 | break; |
1770 | } | |
3fa8871b | 1771 | if (memb == NULL_TREE) |
400fbf9f JW |
1772 | return 0; |
1773 | } | |
46df2823 | 1774 | else if (TREE_CODE (a2) == UNION_TYPE |
3fa8871b | 1775 | && (TYPE_NAME (a2) == NULL_TREE |
ebf0bf7f | 1776 | || TYPE_TRANSPARENT_AGGR (a2)) |
46df2823 JM |
1777 | && TREE_CODE (TYPE_SIZE (a2)) == INTEGER_CST |
1778 | && tree_int_cst_equal (TYPE_SIZE (a2), | |
1779 | TYPE_SIZE (a1))) | |
400fbf9f JW |
1780 | { |
1781 | tree memb; | |
46df2823 | 1782 | for (memb = TYPE_FIELDS (a2); |
910ad8de | 1783 | memb; memb = DECL_CHAIN (memb)) |
58cb41e6 JJ |
1784 | { |
1785 | tree mv3 = TREE_TYPE (memb); | |
1786 | if (mv3 && mv3 != error_mark_node | |
1787 | && TREE_CODE (mv3) != ARRAY_TYPE) | |
267bac10 JM |
1788 | mv3 = (TYPE_ATOMIC (mv3) |
1789 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (mv3), | |
1790 | TYPE_QUAL_ATOMIC) | |
1791 | : TYPE_MAIN_VARIANT (mv3)); | |
dc5027f4 JM |
1792 | if (comptypes_internal (mv3, mv1, enum_and_int_p, |
1793 | different_types_p)) | |
58cb41e6 JJ |
1794 | break; |
1795 | } | |
3fa8871b | 1796 | if (memb == NULL_TREE) |
400fbf9f JW |
1797 | return 0; |
1798 | } | |
1799 | else | |
1800 | return 0; | |
1801 | } | |
1802 | ||
1803 | /* comptypes said ok, but record if it said to warn. */ | |
1804 | if (newval > val) | |
1805 | val = newval; | |
1806 | ||
1807 | args1 = TREE_CHAIN (args1); | |
1808 | args2 = TREE_CHAIN (args2); | |
1809 | } | |
1810 | } | |
400fbf9f | 1811 | \f |
a0e24419 MP |
1812 | /* Compute the size to increment a pointer by. When a function type or void |
1813 | type or incomplete type is passed, size_one_node is returned. | |
1814 | This function does not emit any diagnostics; the caller is responsible | |
1815 | for that. */ | |
400fbf9f | 1816 | |
4e2fb7de | 1817 | static tree |
58f9752a | 1818 | c_size_in_bytes (const_tree type) |
400fbf9f JW |
1819 | { |
1820 | enum tree_code code = TREE_CODE (type); | |
1821 | ||
a0e24419 MP |
1822 | if (code == FUNCTION_TYPE || code == VOID_TYPE || code == ERROR_MARK |
1823 | || !COMPLETE_TYPE_P (type)) | |
fed3cef0 RK |
1824 | return size_one_node; |
1825 | ||
400fbf9f | 1826 | /* Convert in case a char is more than one unit. */ |
db3927fb AH |
1827 | return size_binop_loc (input_location, CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type), |
1828 | size_int (TYPE_PRECISION (char_type_node) | |
1829 | / BITS_PER_UNIT)); | |
400fbf9f | 1830 | } |
400fbf9f | 1831 | \f |
400fbf9f JW |
1832 | /* Return either DECL or its known constant value (if it has one). */ |
1833 | ||
56cb9733 | 1834 | tree |
2f6e4e97 | 1835 | decl_constant_value (tree decl) |
400fbf9f | 1836 | { |
a7c1916a | 1837 | if (/* Don't change a variable array bound or initial value to a constant |
4f976745 RK |
1838 | in a place where a variable is invalid. Note that DECL_INITIAL |
1839 | isn't valid for a PARM_DECL. */ | |
3fa8871b | 1840 | current_function_decl != NULL_TREE |
4f976745 | 1841 | && TREE_CODE (decl) != PARM_DECL |
3f75a254 | 1842 | && !TREE_THIS_VOLATILE (decl) |
83bab8db | 1843 | && TREE_READONLY (decl) |
3fa8871b | 1844 | && DECL_INITIAL (decl) != NULL_TREE |
400fbf9f JW |
1845 | && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK |
1846 | /* This is invalid if initial value is not constant. | |
1847 | If it has either a function call, a memory reference, | |
1848 | or a variable, then re-evaluating it could give different results. */ | |
1849 | && TREE_CONSTANT (DECL_INITIAL (decl)) | |
1850 | /* Check for cases where this is sub-optimal, even though valid. */ | |
2f74f7e9 | 1851 | && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR) |
400fbf9f JW |
1852 | return DECL_INITIAL (decl); |
1853 | return decl; | |
1854 | } | |
1855 | ||
f2a71bbc JM |
1856 | /* Convert the array expression EXP to a pointer. */ |
1857 | static tree | |
c2255bc4 | 1858 | array_to_pointer_conversion (location_t loc, tree exp) |
207bf485 | 1859 | { |
f2a71bbc | 1860 | tree orig_exp = exp; |
207bf485 | 1861 | tree type = TREE_TYPE (exp); |
f2a71bbc JM |
1862 | tree adr; |
1863 | tree restype = TREE_TYPE (type); | |
1864 | tree ptrtype; | |
207bf485 | 1865 | |
f2a71bbc | 1866 | gcc_assert (TREE_CODE (type) == ARRAY_TYPE); |
207bf485 | 1867 | |
f2a71bbc | 1868 | STRIP_TYPE_NOPS (exp); |
207bf485 | 1869 | |
487a92fe JM |
1870 | if (TREE_NO_WARNING (orig_exp)) |
1871 | TREE_NO_WARNING (exp) = 1; | |
207bf485 | 1872 | |
f2a71bbc JM |
1873 | ptrtype = build_pointer_type (restype); |
1874 | ||
22d03525 | 1875 | if (INDIRECT_REF_P (exp)) |
f2a71bbc JM |
1876 | return convert (ptrtype, TREE_OPERAND (exp, 0)); |
1877 | ||
1f37c583 JM |
1878 | /* In C++ array compound literals are temporary objects unless they are |
1879 | const or appear in namespace scope, so they are destroyed too soon | |
1880 | to use them for much of anything (c++/53220). */ | |
1881 | if (warn_cxx_compat && TREE_CODE (exp) == COMPOUND_LITERAL_EXPR) | |
1882 | { | |
1883 | tree decl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0); | |
1884 | if (!TREE_READONLY (decl) && !TREE_STATIC (decl)) | |
1885 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
1886 | "converting an array compound literal to a pointer " | |
1887 | "is ill-formed in C++"); | |
1888 | } | |
1889 | ||
e51fbec3 | 1890 | adr = build_unary_op (loc, ADDR_EXPR, exp, true); |
f2a71bbc JM |
1891 | return convert (ptrtype, adr); |
1892 | } | |
207bf485 | 1893 | |
f2a71bbc JM |
1894 | /* Convert the function expression EXP to a pointer. */ |
1895 | static tree | |
c2255bc4 | 1896 | function_to_pointer_conversion (location_t loc, tree exp) |
f2a71bbc JM |
1897 | { |
1898 | tree orig_exp = exp; | |
207bf485 | 1899 | |
f2a71bbc | 1900 | gcc_assert (TREE_CODE (TREE_TYPE (exp)) == FUNCTION_TYPE); |
207bf485 | 1901 | |
f2a71bbc | 1902 | STRIP_TYPE_NOPS (exp); |
207bf485 | 1903 | |
f2a71bbc JM |
1904 | if (TREE_NO_WARNING (orig_exp)) |
1905 | TREE_NO_WARNING (exp) = 1; | |
207bf485 | 1906 | |
e51fbec3 | 1907 | return build_unary_op (loc, ADDR_EXPR, exp, false); |
f2a71bbc | 1908 | } |
207bf485 | 1909 | |
ebfbbdc5 JJ |
1910 | /* Mark EXP as read, not just set, for set but not used -Wunused |
1911 | warning purposes. */ | |
1912 | ||
1913 | void | |
1914 | mark_exp_read (tree exp) | |
1915 | { | |
1916 | switch (TREE_CODE (exp)) | |
1917 | { | |
1918 | case VAR_DECL: | |
1919 | case PARM_DECL: | |
1920 | DECL_READ_P (exp) = 1; | |
1921 | break; | |
1922 | case ARRAY_REF: | |
1923 | case COMPONENT_REF: | |
1924 | case MODIFY_EXPR: | |
1925 | case REALPART_EXPR: | |
1926 | case IMAGPART_EXPR: | |
1927 | CASE_CONVERT: | |
1928 | case ADDR_EXPR: | |
557e8c49 | 1929 | case VIEW_CONVERT_EXPR: |
ebfbbdc5 JJ |
1930 | mark_exp_read (TREE_OPERAND (exp, 0)); |
1931 | break; | |
1932 | case COMPOUND_EXPR: | |
82c3c067 | 1933 | case C_MAYBE_CONST_EXPR: |
ebfbbdc5 JJ |
1934 | mark_exp_read (TREE_OPERAND (exp, 1)); |
1935 | break; | |
1936 | default: | |
1937 | break; | |
1938 | } | |
1939 | } | |
1940 | ||
f2a71bbc JM |
1941 | /* Perform the default conversion of arrays and functions to pointers. |
1942 | Return the result of converting EXP. For any other expression, just | |
c2255bc4 AH |
1943 | return EXP. |
1944 | ||
1945 | LOC is the location of the expression. */ | |
f2a71bbc JM |
1946 | |
1947 | struct c_expr | |
c2255bc4 | 1948 | default_function_array_conversion (location_t loc, struct c_expr exp) |
f2a71bbc JM |
1949 | { |
1950 | tree orig_exp = exp.value; | |
1951 | tree type = TREE_TYPE (exp.value); | |
1952 | enum tree_code code = TREE_CODE (type); | |
1953 | ||
1954 | switch (code) | |
1955 | { | |
1956 | case ARRAY_TYPE: | |
1957 | { | |
1958 | bool not_lvalue = false; | |
1959 | bool lvalue_array_p; | |
1960 | ||
1961 | while ((TREE_CODE (exp.value) == NON_LVALUE_EXPR | |
1043771b | 1962 | || CONVERT_EXPR_P (exp.value)) |
f2a71bbc JM |
1963 | && TREE_TYPE (TREE_OPERAND (exp.value, 0)) == type) |
1964 | { | |
1965 | if (TREE_CODE (exp.value) == NON_LVALUE_EXPR) | |
1966 | not_lvalue = true; | |
1967 | exp.value = TREE_OPERAND (exp.value, 0); | |
1968 | } | |
1969 | ||
1970 | if (TREE_NO_WARNING (orig_exp)) | |
1971 | TREE_NO_WARNING (exp.value) = 1; | |
1972 | ||
1973 | lvalue_array_p = !not_lvalue && lvalue_p (exp.value); | |
1974 | if (!flag_isoc99 && !lvalue_array_p) | |
1975 | { | |
1976 | /* Before C99, non-lvalue arrays do not decay to pointers. | |
1977 | Normally, using such an array would be invalid; but it can | |
1978 | be used correctly inside sizeof or as a statement expression. | |
1979 | Thus, do not give an error here; an error will result later. */ | |
1980 | return exp; | |
1981 | } | |
1982 | ||
c2255bc4 | 1983 | exp.value = array_to_pointer_conversion (loc, exp.value); |
f2a71bbc JM |
1984 | } |
1985 | break; | |
1986 | case FUNCTION_TYPE: | |
c2255bc4 | 1987 | exp.value = function_to_pointer_conversion (loc, exp.value); |
f2a71bbc JM |
1988 | break; |
1989 | default: | |
f2a71bbc | 1990 | break; |
207bf485 | 1991 | } |
f2a71bbc | 1992 | |
207bf485 JM |
1993 | return exp; |
1994 | } | |
1995 | ||
ebfbbdc5 JJ |
1996 | struct c_expr |
1997 | default_function_array_read_conversion (location_t loc, struct c_expr exp) | |
1998 | { | |
1999 | mark_exp_read (exp.value); | |
2000 | return default_function_array_conversion (loc, exp); | |
2001 | } | |
522ddfa2 | 2002 | |
267bac10 JM |
2003 | /* Return whether EXPR should be treated as an atomic lvalue for the |
2004 | purposes of load and store handling. */ | |
2005 | ||
2006 | static bool | |
2007 | really_atomic_lvalue (tree expr) | |
2008 | { | |
7a0ca710 | 2009 | if (error_operand_p (expr)) |
267bac10 JM |
2010 | return false; |
2011 | if (!TYPE_ATOMIC (TREE_TYPE (expr))) | |
2012 | return false; | |
2013 | if (!lvalue_p (expr)) | |
2014 | return false; | |
2015 | ||
2016 | /* Ignore _Atomic on register variables, since their addresses can't | |
2017 | be taken so (a) atomicity is irrelevant and (b) the normal atomic | |
2018 | sequences wouldn't work. Ignore _Atomic on structures containing | |
2019 | bit-fields, since accessing elements of atomic structures or | |
2020 | unions is undefined behavior (C11 6.5.2.3#5), but it's unclear if | |
2021 | it's undefined at translation time or execution time, and the | |
2022 | normal atomic sequences again wouldn't work. */ | |
2023 | while (handled_component_p (expr)) | |
2024 | { | |
2025 | if (TREE_CODE (expr) == COMPONENT_REF | |
2026 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1))) | |
2027 | return false; | |
2028 | expr = TREE_OPERAND (expr, 0); | |
2029 | } | |
2030 | if (DECL_P (expr) && C_DECL_REGISTER (expr)) | |
2031 | return false; | |
2032 | return true; | |
2033 | } | |
2034 | ||
2035 | /* Convert expression EXP (location LOC) from lvalue to rvalue, | |
2036 | including converting functions and arrays to pointers if CONVERT_P. | |
2037 | If READ_P, also mark the expression as having been read. */ | |
2038 | ||
2039 | struct c_expr | |
2040 | convert_lvalue_to_rvalue (location_t loc, struct c_expr exp, | |
2041 | bool convert_p, bool read_p) | |
2042 | { | |
2043 | if (read_p) | |
2044 | mark_exp_read (exp.value); | |
2045 | if (convert_p) | |
2046 | exp = default_function_array_conversion (loc, exp); | |
2047 | if (really_atomic_lvalue (exp.value)) | |
2048 | { | |
2049 | vec<tree, va_gc> *params; | |
2050 | tree nonatomic_type, tmp, tmp_addr, fndecl, func_call; | |
2051 | tree expr_type = TREE_TYPE (exp.value); | |
e51fbec3 | 2052 | tree expr_addr = build_unary_op (loc, ADDR_EXPR, exp.value, false); |
267bac10 JM |
2053 | tree seq_cst = build_int_cst (integer_type_node, MEMMODEL_SEQ_CST); |
2054 | ||
2055 | gcc_assert (TYPE_ATOMIC (expr_type)); | |
2056 | ||
2057 | /* Expansion of a generic atomic load may require an addition | |
2058 | element, so allocate enough to prevent a resize. */ | |
2059 | vec_alloc (params, 4); | |
2060 | ||
2061 | /* Remove the qualifiers for the rest of the expressions and | |
2062 | create the VAL temp variable to hold the RHS. */ | |
2063 | nonatomic_type = build_qualified_type (expr_type, TYPE_UNQUALIFIED); | |
5c4abbb8 | 2064 | tmp = create_tmp_var_raw (nonatomic_type); |
e51fbec3 | 2065 | tmp_addr = build_unary_op (loc, ADDR_EXPR, tmp, false); |
267bac10 | 2066 | TREE_ADDRESSABLE (tmp) = 1; |
cc28fc7f | 2067 | TREE_NO_WARNING (tmp) = 1; |
267bac10 JM |
2068 | |
2069 | /* Issue __atomic_load (&expr, &tmp, SEQ_CST); */ | |
2070 | fndecl = builtin_decl_explicit (BUILT_IN_ATOMIC_LOAD); | |
2071 | params->quick_push (expr_addr); | |
2072 | params->quick_push (tmp_addr); | |
2073 | params->quick_push (seq_cst); | |
8edbfaa6 | 2074 | func_call = c_build_function_call_vec (loc, vNULL, fndecl, params, NULL); |
267bac10 | 2075 | |
cc28fc7f MP |
2076 | /* EXPR is always read. */ |
2077 | mark_exp_read (exp.value); | |
2078 | ||
267bac10 | 2079 | /* Return tmp which contains the value loaded. */ |
5c4abbb8 MP |
2080 | exp.value = build4 (TARGET_EXPR, nonatomic_type, tmp, func_call, |
2081 | NULL_TREE, NULL_TREE); | |
267bac10 JM |
2082 | } |
2083 | return exp; | |
2084 | } | |
2085 | ||
522ddfa2 JM |
2086 | /* EXP is an expression of integer type. Apply the integer promotions |
2087 | to it and return the promoted value. */ | |
400fbf9f JW |
2088 | |
2089 | tree | |
522ddfa2 | 2090 | perform_integral_promotions (tree exp) |
400fbf9f | 2091 | { |
b3694847 SS |
2092 | tree type = TREE_TYPE (exp); |
2093 | enum tree_code code = TREE_CODE (type); | |
400fbf9f | 2094 | |
522ddfa2 | 2095 | gcc_assert (INTEGRAL_TYPE_P (type)); |
157689c6 | 2096 | |
400fbf9f JW |
2097 | /* Normally convert enums to int, |
2098 | but convert wide enums to something wider. */ | |
2099 | if (code == ENUMERAL_TYPE) | |
2100 | { | |
b0c48229 NB |
2101 | type = c_common_type_for_size (MAX (TYPE_PRECISION (type), |
2102 | TYPE_PRECISION (integer_type_node)), | |
2103 | ((TYPE_PRECISION (type) | |
2104 | >= TYPE_PRECISION (integer_type_node)) | |
8df83eae | 2105 | && TYPE_UNSIGNED (type))); |
05bccae2 | 2106 | |
400fbf9f JW |
2107 | return convert (type, exp); |
2108 | } | |
2109 | ||
522ddfa2 JM |
2110 | /* ??? This should no longer be needed now bit-fields have their |
2111 | proper types. */ | |
9753f113 | 2112 | if (TREE_CODE (exp) == COMPONENT_REF |
05bccae2 | 2113 | && DECL_C_BIT_FIELD (TREE_OPERAND (exp, 1)) |
cff9c407 | 2114 | /* If it's thinner than an int, promote it like a |
d72040f5 | 2115 | c_promoting_integer_type_p, otherwise leave it alone. */ |
05bccae2 RK |
2116 | && 0 > compare_tree_int (DECL_SIZE (TREE_OPERAND (exp, 1)), |
2117 | TYPE_PRECISION (integer_type_node))) | |
f458d1d5 | 2118 | return convert (integer_type_node, exp); |
9753f113 | 2119 | |
d72040f5 | 2120 | if (c_promoting_integer_type_p (type)) |
400fbf9f | 2121 | { |
f458d1d5 | 2122 | /* Preserve unsignedness if not really getting any wider. */ |
8df83eae | 2123 | if (TYPE_UNSIGNED (type) |
f458d1d5 | 2124 | && TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node)) |
400fbf9f | 2125 | return convert (unsigned_type_node, exp); |
05bccae2 | 2126 | |
400fbf9f JW |
2127 | return convert (integer_type_node, exp); |
2128 | } | |
05bccae2 | 2129 | |
522ddfa2 JM |
2130 | return exp; |
2131 | } | |
2132 | ||
2133 | ||
2134 | /* Perform default promotions for C data used in expressions. | |
46bdb9cf | 2135 | Enumeral types or short or char are converted to int. |
522ddfa2 JM |
2136 | In addition, manifest constants symbols are replaced by their values. */ |
2137 | ||
2138 | tree | |
2139 | default_conversion (tree exp) | |
2140 | { | |
2141 | tree orig_exp; | |
2142 | tree type = TREE_TYPE (exp); | |
2143 | enum tree_code code = TREE_CODE (type); | |
40449a90 | 2144 | tree promoted_type; |
522ddfa2 | 2145 | |
ebfbbdc5 JJ |
2146 | mark_exp_read (exp); |
2147 | ||
46bdb9cf JM |
2148 | /* Functions and arrays have been converted during parsing. */ |
2149 | gcc_assert (code != FUNCTION_TYPE); | |
2150 | if (code == ARRAY_TYPE) | |
2151 | return exp; | |
522ddfa2 JM |
2152 | |
2153 | /* Constants can be used directly unless they're not loadable. */ | |
2154 | if (TREE_CODE (exp) == CONST_DECL) | |
2155 | exp = DECL_INITIAL (exp); | |
2156 | ||
522ddfa2 JM |
2157 | /* Strip no-op conversions. */ |
2158 | orig_exp = exp; | |
2159 | STRIP_TYPE_NOPS (exp); | |
2160 | ||
2161 | if (TREE_NO_WARNING (orig_exp)) | |
2162 | TREE_NO_WARNING (exp) = 1; | |
2163 | ||
400fbf9f JW |
2164 | if (code == VOID_TYPE) |
2165 | { | |
5436fa2e MP |
2166 | error_at (EXPR_LOC_OR_LOC (exp, input_location), |
2167 | "void value not ignored as it ought to be"); | |
400fbf9f JW |
2168 | return error_mark_node; |
2169 | } | |
808d6eaa | 2170 | |
4f2e1536 | 2171 | exp = require_complete_type (EXPR_LOC_OR_LOC (exp, input_location), exp); |
808d6eaa JM |
2172 | if (exp == error_mark_node) |
2173 | return error_mark_node; | |
2174 | ||
40449a90 SL |
2175 | promoted_type = targetm.promoted_type (type); |
2176 | if (promoted_type) | |
2177 | return convert (promoted_type, exp); | |
2178 | ||
808d6eaa JM |
2179 | if (INTEGRAL_TYPE_P (type)) |
2180 | return perform_integral_promotions (exp); | |
2181 | ||
400fbf9f JW |
2182 | return exp; |
2183 | } | |
2184 | \f | |
0fb96aa4 | 2185 | /* Look up COMPONENT in a structure or union TYPE. |
e9b2c823 NB |
2186 | |
2187 | If the component name is not found, returns NULL_TREE. Otherwise, | |
2188 | the return value is a TREE_LIST, with each TREE_VALUE a FIELD_DECL | |
2189 | stepping down the chain to the component, which is in the last | |
2190 | TREE_VALUE of the list. Normally the list is of length one, but if | |
2191 | the component is embedded within (nested) anonymous structures or | |
2192 | unions, the list steps down the chain to the component. */ | |
2f6e4e97 | 2193 | |
2f2d13da | 2194 | static tree |
0fb96aa4 | 2195 | lookup_field (tree type, tree component) |
2f2d13da DE |
2196 | { |
2197 | tree field; | |
2198 | ||
2199 | /* If TYPE_LANG_SPECIFIC is set, then it is a sorted array of pointers | |
2200 | to the field elements. Use a binary search on this array to quickly | |
2201 | find the element. Otherwise, do a linear search. TYPE_LANG_SPECIFIC | |
2202 | will always be set for structures which have many elements. */ | |
2203 | ||
22a0b85f | 2204 | if (TYPE_LANG_SPECIFIC (type) && TYPE_LANG_SPECIFIC (type)->s) |
2f2d13da DE |
2205 | { |
2206 | int bot, top, half; | |
d07605f5 | 2207 | tree *field_array = &TYPE_LANG_SPECIFIC (type)->s->elts[0]; |
2f2d13da DE |
2208 | |
2209 | field = TYPE_FIELDS (type); | |
2210 | bot = 0; | |
d07605f5 | 2211 | top = TYPE_LANG_SPECIFIC (type)->s->len; |
2f2d13da DE |
2212 | while (top - bot > 1) |
2213 | { | |
2f2d13da DE |
2214 | half = (top - bot + 1) >> 1; |
2215 | field = field_array[bot+half]; | |
2216 | ||
2217 | if (DECL_NAME (field) == NULL_TREE) | |
2218 | { | |
2219 | /* Step through all anon unions in linear fashion. */ | |
2220 | while (DECL_NAME (field_array[bot]) == NULL_TREE) | |
2221 | { | |
2f2d13da | 2222 | field = field_array[bot++]; |
3e636daf | 2223 | if (RECORD_OR_UNION_TYPE_P (TREE_TYPE (field))) |
19d76e60 | 2224 | { |
0fb96aa4 | 2225 | tree anon = lookup_field (TREE_TYPE (field), component); |
e9b2c823 NB |
2226 | |
2227 | if (anon) | |
2228 | return tree_cons (NULL_TREE, field, anon); | |
478a1c5b ILT |
2229 | |
2230 | /* The Plan 9 compiler permits referring | |
2231 | directly to an anonymous struct/union field | |
2232 | using a typedef name. */ | |
2233 | if (flag_plan9_extensions | |
2234 | && TYPE_NAME (TREE_TYPE (field)) != NULL_TREE | |
2235 | && (TREE_CODE (TYPE_NAME (TREE_TYPE (field))) | |
2236 | == TYPE_DECL) | |
2237 | && (DECL_NAME (TYPE_NAME (TREE_TYPE (field))) | |
2238 | == component)) | |
2239 | break; | |
2f6e4e97 | 2240 | } |
2f2d13da DE |
2241 | } |
2242 | ||
2243 | /* Entire record is only anon unions. */ | |
2244 | if (bot > top) | |
2245 | return NULL_TREE; | |
2246 | ||
2247 | /* Restart the binary search, with new lower bound. */ | |
2248 | continue; | |
2249 | } | |
2250 | ||
e8b87aac | 2251 | if (DECL_NAME (field) == component) |
2f2d13da | 2252 | break; |
e8b87aac | 2253 | if (DECL_NAME (field) < component) |
2f2d13da DE |
2254 | bot += half; |
2255 | else | |
2256 | top = bot + half; | |
2257 | } | |
2258 | ||
2259 | if (DECL_NAME (field_array[bot]) == component) | |
2260 | field = field_array[bot]; | |
2261 | else if (DECL_NAME (field) != component) | |
e9b2c823 | 2262 | return NULL_TREE; |
2f2d13da DE |
2263 | } |
2264 | else | |
2265 | { | |
910ad8de | 2266 | for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) |
2f2d13da | 2267 | { |
e9b2c823 | 2268 | if (DECL_NAME (field) == NULL_TREE |
3e636daf | 2269 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (field))) |
2f2d13da | 2270 | { |
0fb96aa4 | 2271 | tree anon = lookup_field (TREE_TYPE (field), component); |
a68b98cf | 2272 | |
e9b2c823 NB |
2273 | if (anon) |
2274 | return tree_cons (NULL_TREE, field, anon); | |
478a1c5b ILT |
2275 | |
2276 | /* The Plan 9 compiler permits referring directly to an | |
2277 | anonymous struct/union field using a typedef | |
2278 | name. */ | |
2279 | if (flag_plan9_extensions | |
2280 | && TYPE_NAME (TREE_TYPE (field)) != NULL_TREE | |
2281 | && TREE_CODE (TYPE_NAME (TREE_TYPE (field))) == TYPE_DECL | |
2282 | && (DECL_NAME (TYPE_NAME (TREE_TYPE (field))) | |
2283 | == component)) | |
2284 | break; | |
2f2d13da DE |
2285 | } |
2286 | ||
2287 | if (DECL_NAME (field) == component) | |
2288 | break; | |
2289 | } | |
e9b2c823 NB |
2290 | |
2291 | if (field == NULL_TREE) | |
2292 | return NULL_TREE; | |
2f2d13da DE |
2293 | } |
2294 | ||
e9b2c823 | 2295 | return tree_cons (NULL_TREE, field, NULL_TREE); |
2f2d13da DE |
2296 | } |
2297 | ||
277fe616 DM |
2298 | /* Recursively append candidate IDENTIFIER_NODEs to CANDIDATES. */ |
2299 | ||
2300 | static void | |
2301 | lookup_field_fuzzy_find_candidates (tree type, tree component, | |
2302 | vec<tree> *candidates) | |
2303 | { | |
2304 | tree field; | |
2305 | for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) | |
2306 | { | |
2307 | if (DECL_NAME (field) == NULL_TREE | |
3e636daf MP |
2308 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (field))) |
2309 | lookup_field_fuzzy_find_candidates (TREE_TYPE (field), component, | |
2310 | candidates); | |
277fe616 DM |
2311 | |
2312 | if (DECL_NAME (field)) | |
2313 | candidates->safe_push (DECL_NAME (field)); | |
2314 | } | |
2315 | } | |
2316 | ||
2317 | /* Like "lookup_field", but find the closest matching IDENTIFIER_NODE, | |
2318 | rather than returning a TREE_LIST for an exact match. */ | |
2319 | ||
2320 | static tree | |
2321 | lookup_field_fuzzy (tree type, tree component) | |
2322 | { | |
2323 | gcc_assert (TREE_CODE (component) == IDENTIFIER_NODE); | |
2324 | ||
2325 | /* First, gather a list of candidates. */ | |
2326 | auto_vec <tree> candidates; | |
2327 | ||
2328 | lookup_field_fuzzy_find_candidates (type, component, | |
2329 | &candidates); | |
2330 | ||
8ece8dfb | 2331 | return find_closest_identifier (component, &candidates); |
277fe616 DM |
2332 | } |
2333 | ||
a87a86e1 DM |
2334 | /* Support function for build_component_ref's error-handling. |
2335 | ||
2336 | Given DATUM_TYPE, and "DATUM.COMPONENT", where DATUM is *not* a | |
2337 | struct or union, should we suggest "DATUM->COMPONENT" as a hint? */ | |
2338 | ||
2339 | static bool | |
2340 | should_suggest_deref_p (tree datum_type) | |
2341 | { | |
2342 | /* We don't do it for Objective-C, since Objective-C 2.0 dot-syntax | |
2343 | allows "." for ptrs; we could be handling a failed attempt | |
2344 | to access a property. */ | |
2345 | if (c_dialect_objc ()) | |
2346 | return false; | |
2347 | ||
2348 | /* Only suggest it for pointers... */ | |
2349 | if (TREE_CODE (datum_type) != POINTER_TYPE) | |
2350 | return false; | |
2351 | ||
2352 | /* ...to structs/unions. */ | |
2353 | tree underlying_type = TREE_TYPE (datum_type); | |
2354 | enum tree_code code = TREE_CODE (underlying_type); | |
2355 | if (code == RECORD_TYPE || code == UNION_TYPE) | |
2356 | return true; | |
2357 | else | |
2358 | return false; | |
2359 | } | |
2360 | ||
c2255bc4 AH |
2361 | /* Make an expression to refer to the COMPONENT field of structure or |
2362 | union value DATUM. COMPONENT is an IDENTIFIER_NODE. LOC is the | |
6ffd47b7 DM |
2363 | location of the COMPONENT_REF. COMPONENT_LOC is the location |
2364 | of COMPONENT. */ | |
400fbf9f JW |
2365 | |
2366 | tree | |
6ffd47b7 DM |
2367 | build_component_ref (location_t loc, tree datum, tree component, |
2368 | location_t component_loc) | |
400fbf9f | 2369 | { |
b3694847 SS |
2370 | tree type = TREE_TYPE (datum); |
2371 | enum tree_code code = TREE_CODE (type); | |
2372 | tree field = NULL; | |
2373 | tree ref; | |
1e57bf47 | 2374 | bool datum_lvalue = lvalue_p (datum); |
400fbf9f | 2375 | |
7a3ea201 RH |
2376 | if (!objc_is_public (datum, component)) |
2377 | return error_mark_node; | |
2378 | ||
46a88c12 | 2379 | /* Detect Objective-C property syntax object.property. */ |
668ea4b1 | 2380 | if (c_dialect_objc () |
46a88c12 | 2381 | && (ref = objc_maybe_build_component_ref (datum, component))) |
668ea4b1 IS |
2382 | return ref; |
2383 | ||
400fbf9f JW |
2384 | /* See if there is a field or component with name COMPONENT. */ |
2385 | ||
2386 | if (code == RECORD_TYPE || code == UNION_TYPE) | |
2387 | { | |
d0f062fb | 2388 | if (!COMPLETE_TYPE_P (type)) |
400fbf9f | 2389 | { |
4f2e1536 | 2390 | c_incomplete_type_error (loc, NULL_TREE, type); |
400fbf9f JW |
2391 | return error_mark_node; |
2392 | } | |
2393 | ||
0fb96aa4 | 2394 | field = lookup_field (type, component); |
400fbf9f JW |
2395 | |
2396 | if (!field) | |
2397 | { | |
277fe616 DM |
2398 | tree guessed_id = lookup_field_fuzzy (type, component); |
2399 | if (guessed_id) | |
6ffd47b7 DM |
2400 | { |
2401 | /* Attempt to provide a fixit replacement hint, if | |
2402 | we have a valid range for the component. */ | |
2403 | location_t reported_loc | |
2404 | = (component_loc != UNKNOWN_LOCATION) ? component_loc : loc; | |
264757fb | 2405 | gcc_rich_location rich_loc (reported_loc); |
6ffd47b7 | 2406 | if (component_loc != UNKNOWN_LOCATION) |
264757fb | 2407 | rich_loc.add_fixit_misspelled_id (component_loc, guessed_id); |
64a5912c DM |
2408 | error_at (&rich_loc, |
2409 | "%qT has no member named %qE; did you mean %qE?", | |
2410 | type, component, guessed_id); | |
6ffd47b7 | 2411 | } |
277fe616 DM |
2412 | else |
2413 | error_at (loc, "%qT has no member named %qE", type, component); | |
400fbf9f JW |
2414 | return error_mark_node; |
2415 | } | |
400fbf9f | 2416 | |
fda5652f MP |
2417 | /* Accessing elements of atomic structures or unions is undefined |
2418 | behavior (C11 6.5.2.3#5). */ | |
2419 | if (TYPE_ATOMIC (type) && c_inhibit_evaluation_warnings == 0) | |
2420 | { | |
2421 | if (code == RECORD_TYPE) | |
2422 | warning_at (loc, 0, "accessing a member %qE of an atomic " | |
2423 | "structure %qE", component, datum); | |
2424 | else | |
2425 | warning_at (loc, 0, "accessing a member %qE of an atomic " | |
2426 | "union %qE", component, datum); | |
2427 | } | |
2428 | ||
e9b2c823 NB |
2429 | /* Chain the COMPONENT_REFs if necessary down to the FIELD. |
2430 | This might be better solved in future the way the C++ front | |
2431 | end does it - by giving the anonymous entities each a | |
2432 | separate name and type, and then have build_component_ref | |
2433 | recursively call itself. We can't do that here. */ | |
46ea50cb | 2434 | do |
19d76e60 | 2435 | { |
e9b2c823 | 2436 | tree subdatum = TREE_VALUE (field); |
efed193e JM |
2437 | int quals; |
2438 | tree subtype; | |
1e57bf47 | 2439 | bool use_datum_quals; |
e9b2c823 NB |
2440 | |
2441 | if (TREE_TYPE (subdatum) == error_mark_node) | |
2442 | return error_mark_node; | |
2443 | ||
1e57bf47 JM |
2444 | /* If this is an rvalue, it does not have qualifiers in C |
2445 | standard terms and we must avoid propagating such | |
2446 | qualifiers down to a non-lvalue array that is then | |
2447 | converted to a pointer. */ | |
2448 | use_datum_quals = (datum_lvalue | |
2449 | || TREE_CODE (TREE_TYPE (subdatum)) != ARRAY_TYPE); | |
2450 | ||
efed193e | 2451 | quals = TYPE_QUALS (strip_array_types (TREE_TYPE (subdatum))); |
1e57bf47 JM |
2452 | if (use_datum_quals) |
2453 | quals |= TYPE_QUALS (TREE_TYPE (datum)); | |
efed193e JM |
2454 | subtype = c_build_qualified_type (TREE_TYPE (subdatum), quals); |
2455 | ||
2456 | ref = build3 (COMPONENT_REF, subtype, datum, subdatum, | |
53fb4de3 | 2457 | NULL_TREE); |
c2255bc4 | 2458 | SET_EXPR_LOCATION (ref, loc); |
1e57bf47 JM |
2459 | if (TREE_READONLY (subdatum) |
2460 | || (use_datum_quals && TREE_READONLY (datum))) | |
19d76e60 | 2461 | TREE_READONLY (ref) = 1; |
1e57bf47 JM |
2462 | if (TREE_THIS_VOLATILE (subdatum) |
2463 | || (use_datum_quals && TREE_THIS_VOLATILE (datum))) | |
19d76e60 | 2464 | TREE_THIS_VOLATILE (ref) = 1; |
e23bd218 IR |
2465 | |
2466 | if (TREE_DEPRECATED (subdatum)) | |
9b86d6bb | 2467 | warn_deprecated_use (subdatum, NULL_TREE); |
e23bd218 | 2468 | |
19d76e60 | 2469 | datum = ref; |
46ea50cb RS |
2470 | |
2471 | field = TREE_CHAIN (field); | |
19d76e60 | 2472 | } |
46ea50cb | 2473 | while (field); |
19d76e60 | 2474 | |
400fbf9f JW |
2475 | return ref; |
2476 | } | |
a87a86e1 DM |
2477 | else if (should_suggest_deref_p (type)) |
2478 | { | |
2479 | /* Special-case the error message for "ptr.field" for the case | |
2480 | where the user has confused "." vs "->". */ | |
2481 | rich_location richloc (line_table, loc); | |
2482 | /* "loc" should be the "." token. */ | |
f9087798 | 2483 | richloc.add_fixit_replace ("->"); |
64a5912c DM |
2484 | error_at (&richloc, |
2485 | "%qE is a pointer; did you mean to use %<->%>?", | |
2486 | datum); | |
a87a86e1 DM |
2487 | return error_mark_node; |
2488 | } | |
400fbf9f | 2489 | else if (code != ERROR_MARK) |
c2255bc4 AH |
2490 | error_at (loc, |
2491 | "request for member %qE in something not a structure or union", | |
2492 | component); | |
400fbf9f JW |
2493 | |
2494 | return error_mark_node; | |
2495 | } | |
2496 | \f | |
2497 | /* Given an expression PTR for a pointer, return an expression | |
2498 | for the value pointed to. | |
6a3799eb AH |
2499 | ERRORSTRING is the name of the operator to appear in error messages. |
2500 | ||
2501 | LOC is the location to use for the generated tree. */ | |
400fbf9f JW |
2502 | |
2503 | tree | |
dd865ef6 | 2504 | build_indirect_ref (location_t loc, tree ptr, ref_operator errstring) |
400fbf9f | 2505 | { |
b3694847 SS |
2506 | tree pointer = default_conversion (ptr); |
2507 | tree type = TREE_TYPE (pointer); | |
6a3799eb | 2508 | tree ref; |
400fbf9f JW |
2509 | |
2510 | if (TREE_CODE (type) == POINTER_TYPE) | |
870cc33b | 2511 | { |
1043771b | 2512 | if (CONVERT_EXPR_P (pointer) |
79bedddc SR |
2513 | || TREE_CODE (pointer) == VIEW_CONVERT_EXPR) |
2514 | { | |
2515 | /* If a warning is issued, mark it to avoid duplicates from | |
2516 | the backend. This only needs to be done at | |
2517 | warn_strict_aliasing > 2. */ | |
2518 | if (warn_strict_aliasing > 2) | |
2519 | if (strict_aliasing_warning (TREE_TYPE (TREE_OPERAND (pointer, 0)), | |
2520 | type, TREE_OPERAND (pointer, 0))) | |
2521 | TREE_NO_WARNING (pointer) = 1; | |
2522 | } | |
2523 | ||
870cc33b | 2524 | if (TREE_CODE (pointer) == ADDR_EXPR |
870cc33b RS |
2525 | && (TREE_TYPE (TREE_OPERAND (pointer, 0)) |
2526 | == TREE_TYPE (type))) | |
6a3799eb AH |
2527 | { |
2528 | ref = TREE_OPERAND (pointer, 0); | |
2529 | protected_set_expr_location (ref, loc); | |
2530 | return ref; | |
2531 | } | |
870cc33b RS |
2532 | else |
2533 | { | |
2534 | tree t = TREE_TYPE (type); | |
46df2823 | 2535 | |
984dfd8c | 2536 | ref = build1 (INDIRECT_REF, t, pointer); |
400fbf9f | 2537 | |
baae9b65 | 2538 | if (!COMPLETE_OR_VOID_TYPE_P (t) && TREE_CODE (t) != ARRAY_TYPE) |
870cc33b | 2539 | { |
d9b7be2e MP |
2540 | if (!C_TYPE_ERROR_REPORTED (TREE_TYPE (ptr))) |
2541 | { | |
2542 | error_at (loc, "dereferencing pointer to incomplete type " | |
2543 | "%qT", t); | |
2544 | C_TYPE_ERROR_REPORTED (TREE_TYPE (ptr)) = 1; | |
2545 | } | |
870cc33b RS |
2546 | return error_mark_node; |
2547 | } | |
7d882b83 | 2548 | if (VOID_TYPE_P (t) && c_inhibit_evaluation_warnings == 0) |
c9f9eb5d | 2549 | warning_at (loc, 0, "dereferencing %<void *%> pointer"); |
870cc33b RS |
2550 | |
2551 | /* We *must* set TREE_READONLY when dereferencing a pointer to const, | |
2552 | so that we get the proper error message if the result is used | |
2553 | to assign to. Also, &* is supposed to be a no-op. | |
2554 | And ANSI C seems to specify that the type of the result | |
2555 | should be the const type. */ | |
2556 | /* A de-reference of a pointer to const is not a const. It is valid | |
2557 | to change it via some other pointer. */ | |
2558 | TREE_READONLY (ref) = TYPE_READONLY (t); | |
2559 | TREE_SIDE_EFFECTS (ref) | |
271bd540 | 2560 | = TYPE_VOLATILE (t) || TREE_SIDE_EFFECTS (pointer); |
493692cd | 2561 | TREE_THIS_VOLATILE (ref) = TYPE_VOLATILE (t); |
6a3799eb | 2562 | protected_set_expr_location (ref, loc); |
870cc33b RS |
2563 | return ref; |
2564 | } | |
2565 | } | |
400fbf9f | 2566 | else if (TREE_CODE (pointer) != ERROR_MARK) |
7a6daeb0 NF |
2567 | invalid_indirection_error (loc, type, errstring); |
2568 | ||
400fbf9f JW |
2569 | return error_mark_node; |
2570 | } | |
2571 | ||
2572 | /* This handles expressions of the form "a[i]", which denotes | |
2573 | an array reference. | |
2574 | ||
2575 | This is logically equivalent in C to *(a+i), but we may do it differently. | |
2576 | If A is a variable or a member, we generate a primitive ARRAY_REF. | |
2577 | This avoids forcing the array out of registers, and can work on | |
2578 | arrays that are not lvalues (for example, members of structures returned | |
6a3799eb AH |
2579 | by functions). |
2580 | ||
30cd1c5d AS |
2581 | For vector types, allow vector[i] but not i[vector], and create |
2582 | *(((type*)&vectortype) + i) for the expression. | |
2583 | ||
6a3799eb | 2584 | LOC is the location to use for the returned expression. */ |
400fbf9f JW |
2585 | |
2586 | tree | |
c2255bc4 | 2587 | build_array_ref (location_t loc, tree array, tree index) |
400fbf9f | 2588 | { |
6a3799eb | 2589 | tree ret; |
a4ab7973 | 2590 | bool swapped = false; |
400fbf9f JW |
2591 | if (TREE_TYPE (array) == error_mark_node |
2592 | || TREE_TYPE (index) == error_mark_node) | |
2593 | return error_mark_node; | |
2594 | ||
a4ab7973 | 2595 | if (TREE_CODE (TREE_TYPE (array)) != ARRAY_TYPE |
30cd1c5d AS |
2596 | && TREE_CODE (TREE_TYPE (array)) != POINTER_TYPE |
2597 | /* Allow vector[index] but not index[vector]. */ | |
31521951 | 2598 | && !VECTOR_TYPE_P (TREE_TYPE (array))) |
400fbf9f | 2599 | { |
a4ab7973 JM |
2600 | if (TREE_CODE (TREE_TYPE (index)) != ARRAY_TYPE |
2601 | && TREE_CODE (TREE_TYPE (index)) != POINTER_TYPE) | |
fdeefd49 | 2602 | { |
f90e8e2e | 2603 | error_at (loc, |
30cd1c5d AS |
2604 | "subscripted value is neither array nor pointer nor vector"); |
2605 | ||
fdeefd49 RS |
2606 | return error_mark_node; |
2607 | } | |
fab27f52 | 2608 | std::swap (array, index); |
a4ab7973 JM |
2609 | swapped = true; |
2610 | } | |
2611 | ||
2612 | if (!INTEGRAL_TYPE_P (TREE_TYPE (index))) | |
2613 | { | |
a63068b6 | 2614 | error_at (loc, "array subscript is not an integer"); |
a4ab7973 JM |
2615 | return error_mark_node; |
2616 | } | |
2617 | ||
2618 | if (TREE_CODE (TREE_TYPE (TREE_TYPE (array))) == FUNCTION_TYPE) | |
2619 | { | |
a63068b6 | 2620 | error_at (loc, "subscripted value is pointer to function"); |
a4ab7973 JM |
2621 | return error_mark_node; |
2622 | } | |
2623 | ||
ff6b6641 GDR |
2624 | /* ??? Existing practice has been to warn only when the char |
2625 | index is syntactically the index, not for char[array]. */ | |
2626 | if (!swapped) | |
5bd012f8 | 2627 | warn_array_subscript_with_type_char (loc, index); |
a4ab7973 JM |
2628 | |
2629 | /* Apply default promotions *after* noticing character types. */ | |
2630 | index = default_conversion (index); | |
f406ae1f MP |
2631 | if (index == error_mark_node) |
2632 | return error_mark_node; | |
a4ab7973 JM |
2633 | |
2634 | gcc_assert (TREE_CODE (TREE_TYPE (index)) == INTEGER_TYPE); | |
f90e8e2e | 2635 | |
f17a223d RB |
2636 | bool was_vector = VECTOR_TYPE_P (TREE_TYPE (array)); |
2637 | bool non_lvalue = convert_vector_to_array_for_subscript (loc, &array, index); | |
a4ab7973 JM |
2638 | |
2639 | if (TREE_CODE (TREE_TYPE (array)) == ARRAY_TYPE) | |
2640 | { | |
e4d35515 | 2641 | tree rval, type; |
fdeefd49 | 2642 | |
400fbf9f JW |
2643 | /* An array that is indexed by a non-constant |
2644 | cannot be stored in a register; we must be able to do | |
2645 | address arithmetic on its address. | |
2646 | Likewise an array of elements of variable size. */ | |
2647 | if (TREE_CODE (index) != INTEGER_CST | |
d0f062fb | 2648 | || (COMPLETE_TYPE_P (TREE_TYPE (TREE_TYPE (array))) |
400fbf9f JW |
2649 | && TREE_CODE (TYPE_SIZE (TREE_TYPE (TREE_TYPE (array)))) != INTEGER_CST)) |
2650 | { | |
a9e4a1a5 | 2651 | if (!c_mark_addressable (array, true)) |
400fbf9f JW |
2652 | return error_mark_node; |
2653 | } | |
e6d52559 JW |
2654 | /* An array that is indexed by a constant value which is not within |
2655 | the array bounds cannot be stored in a register either; because we | |
2656 | would get a crash in store_bit_field/extract_bit_field when trying | |
2657 | to access a non-existent part of the register. */ | |
2658 | if (TREE_CODE (index) == INTEGER_CST | |
eb34af89 | 2659 | && TYPE_DOMAIN (TREE_TYPE (array)) |
3f75a254 | 2660 | && !int_fits_type_p (index, TYPE_DOMAIN (TREE_TYPE (array)))) |
e6d52559 | 2661 | { |
dffd7eb6 | 2662 | if (!c_mark_addressable (array)) |
e6d52559 JW |
2663 | return error_mark_node; |
2664 | } | |
400fbf9f | 2665 | |
f17a223d RB |
2666 | if ((pedantic || warn_c90_c99_compat) |
2667 | && ! was_vector) | |
400fbf9f JW |
2668 | { |
2669 | tree foo = array; | |
2670 | while (TREE_CODE (foo) == COMPONENT_REF) | |
2671 | foo = TREE_OPERAND (foo, 0); | |
0ae9bd27 | 2672 | if (VAR_P (foo) && C_DECL_REGISTER (foo)) |
c1771a20 | 2673 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 2674 | "ISO C forbids subscripting %<register%> array"); |
f3bede71 MP |
2675 | else if (!lvalue_p (foo)) |
2676 | pedwarn_c90 (loc, OPT_Wpedantic, | |
2677 | "ISO C90 forbids subscripting non-lvalue " | |
2678 | "array"); | |
400fbf9f JW |
2679 | } |
2680 | ||
46df2823 | 2681 | type = TREE_TYPE (TREE_TYPE (array)); |
53fb4de3 | 2682 | rval = build4 (ARRAY_REF, type, array, index, NULL_TREE, NULL_TREE); |
400fbf9f | 2683 | /* Array ref is const/volatile if the array elements are |
c22cacf3 | 2684 | or if the array is. */ |
400fbf9f JW |
2685 | TREE_READONLY (rval) |
2686 | |= (TYPE_READONLY (TREE_TYPE (TREE_TYPE (array))) | |
2687 | | TREE_READONLY (array)); | |
2688 | TREE_SIDE_EFFECTS (rval) | |
2689 | |= (TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (array))) | |
2690 | | TREE_SIDE_EFFECTS (array)); | |
2691 | TREE_THIS_VOLATILE (rval) | |
2692 | |= (TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (array))) | |
2693 | /* This was added by rms on 16 Nov 91. | |
2f6e4e97 | 2694 | It fixes vol struct foo *a; a->elts[1] |
400fbf9f JW |
2695 | in an inline function. |
2696 | Hope it doesn't break something else. */ | |
2697 | | TREE_THIS_VOLATILE (array)); | |
4f2e1536 | 2698 | ret = require_complete_type (loc, rval); |
6a3799eb | 2699 | protected_set_expr_location (ret, loc); |
aa7da51a JJ |
2700 | if (non_lvalue) |
2701 | ret = non_lvalue_loc (loc, ret); | |
6a3799eb | 2702 | return ret; |
400fbf9f | 2703 | } |
a4ab7973 JM |
2704 | else |
2705 | { | |
2706 | tree ar = default_conversion (array); | |
400fbf9f | 2707 | |
a4ab7973 JM |
2708 | if (ar == error_mark_node) |
2709 | return ar; | |
400fbf9f | 2710 | |
a4ab7973 JM |
2711 | gcc_assert (TREE_CODE (TREE_TYPE (ar)) == POINTER_TYPE); |
2712 | gcc_assert (TREE_CODE (TREE_TYPE (TREE_TYPE (ar))) != FUNCTION_TYPE); | |
400fbf9f | 2713 | |
aa7da51a | 2714 | ret = build_indirect_ref (loc, build_binary_op (loc, PLUS_EXPR, ar, |
30af3a2b | 2715 | index, false), |
aa7da51a JJ |
2716 | RO_ARRAY_INDEXING); |
2717 | if (non_lvalue) | |
2718 | ret = non_lvalue_loc (loc, ret); | |
2719 | return ret; | |
a4ab7973 | 2720 | } |
400fbf9f JW |
2721 | } |
2722 | \f | |
7e585d16 | 2723 | /* Build an external reference to identifier ID. FUN indicates |
766beb40 | 2724 | whether this will be used for a function call. LOC is the source |
6866c6e8 ILT |
2725 | location of the identifier. This sets *TYPE to the type of the |
2726 | identifier, which is not the same as the type of the returned value | |
2727 | for CONST_DECLs defined as enum constants. If the type of the | |
2728 | identifier is not available, *TYPE is set to NULL. */ | |
7e585d16 | 2729 | tree |
30af3a2b | 2730 | build_external_ref (location_t loc, tree id, bool fun, tree *type) |
7e585d16 ZW |
2731 | { |
2732 | tree ref; | |
2733 | tree decl = lookup_name (id); | |
16b34ad6 ZL |
2734 | |
2735 | /* In Objective-C, an instance variable (ivar) may be preferred to | |
2736 | whatever lookup_name() found. */ | |
2737 | decl = objc_lookup_ivar (decl, id); | |
7e585d16 | 2738 | |
6866c6e8 | 2739 | *type = NULL; |
339a28b9 | 2740 | if (decl && decl != error_mark_node) |
6866c6e8 ILT |
2741 | { |
2742 | ref = decl; | |
2743 | *type = TREE_TYPE (ref); | |
2744 | } | |
339a28b9 ZW |
2745 | else if (fun) |
2746 | /* Implicit function declaration. */ | |
c2255bc4 | 2747 | ref = implicitly_declare (loc, id); |
339a28b9 ZW |
2748 | else if (decl == error_mark_node) |
2749 | /* Don't complain about something that's already been | |
2750 | complained about. */ | |
2751 | return error_mark_node; | |
2752 | else | |
2753 | { | |
c2255bc4 | 2754 | undeclared_variable (loc, id); |
339a28b9 ZW |
2755 | return error_mark_node; |
2756 | } | |
7e585d16 ZW |
2757 | |
2758 | if (TREE_TYPE (ref) == error_mark_node) | |
2759 | return error_mark_node; | |
2760 | ||
339a28b9 | 2761 | if (TREE_DEPRECATED (ref)) |
9b86d6bb | 2762 | warn_deprecated_use (ref, NULL_TREE); |
339a28b9 | 2763 | |
ad960f56 | 2764 | /* Recursive call does not count as usage. */ |
b8698a0f | 2765 | if (ref != current_function_decl) |
ad960f56 | 2766 | { |
ad960f56 MLI |
2767 | TREE_USED (ref) = 1; |
2768 | } | |
7e585d16 | 2769 | |
bc4b653b JM |
2770 | if (TREE_CODE (ref) == FUNCTION_DECL && !in_alignof) |
2771 | { | |
2772 | if (!in_sizeof && !in_typeof) | |
2773 | C_DECL_USED (ref) = 1; | |
3fa8871b | 2774 | else if (DECL_INITIAL (ref) == NULL_TREE |
bc4b653b JM |
2775 | && DECL_EXTERNAL (ref) |
2776 | && !TREE_PUBLIC (ref)) | |
2777 | record_maybe_used_decl (ref); | |
2778 | } | |
2779 | ||
7e585d16 ZW |
2780 | if (TREE_CODE (ref) == CONST_DECL) |
2781 | { | |
6193b8b7 | 2782 | used_types_insert (TREE_TYPE (ref)); |
24b97832 ILT |
2783 | |
2784 | if (warn_cxx_compat | |
2785 | && TREE_CODE (TREE_TYPE (ref)) == ENUMERAL_TYPE | |
2786 | && C_TYPE_DEFINED_IN_STRUCT (TREE_TYPE (ref))) | |
2787 | { | |
2788 | warning_at (loc, OPT_Wc___compat, | |
2789 | ("enum constant defined in struct or union " | |
2790 | "is not visible in C++")); | |
2791 | inform (DECL_SOURCE_LOCATION (ref), "enum constant defined here"); | |
2792 | } | |
2793 | ||
7e585d16 ZW |
2794 | ref = DECL_INITIAL (ref); |
2795 | TREE_CONSTANT (ref) = 1; | |
2796 | } | |
3fa8871b | 2797 | else if (current_function_decl != NULL_TREE |
4b1e44be | 2798 | && !DECL_FILE_SCOPE_P (current_function_decl) |
21b634ae MP |
2799 | && (VAR_OR_FUNCTION_DECL_P (ref) |
2800 | || TREE_CODE (ref) == PARM_DECL)) | |
6a29edea EB |
2801 | { |
2802 | tree context = decl_function_context (ref); | |
2f6e4e97 | 2803 | |
3fa8871b | 2804 | if (context != NULL_TREE && context != current_function_decl) |
6a29edea EB |
2805 | DECL_NONLOCAL (ref) = 1; |
2806 | } | |
71113fcd GK |
2807 | /* C99 6.7.4p3: An inline definition of a function with external |
2808 | linkage ... shall not contain a reference to an identifier with | |
2809 | internal linkage. */ | |
3fa8871b | 2810 | else if (current_function_decl != NULL_TREE |
71113fcd GK |
2811 | && DECL_DECLARED_INLINE_P (current_function_decl) |
2812 | && DECL_EXTERNAL (current_function_decl) | |
2813 | && VAR_OR_FUNCTION_DECL_P (ref) | |
0ae9bd27 | 2814 | && (!VAR_P (ref) || TREE_STATIC (ref)) |
1033ffa8 JJ |
2815 | && ! TREE_PUBLIC (ref) |
2816 | && DECL_CONTEXT (ref) != current_function_decl) | |
991d6621 JM |
2817 | record_inline_static (loc, current_function_decl, ref, |
2818 | csi_internal); | |
7e585d16 ZW |
2819 | |
2820 | return ref; | |
2821 | } | |
2822 | ||
bc4b653b JM |
2823 | /* Record details of decls possibly used inside sizeof or typeof. */ |
2824 | struct maybe_used_decl | |
2825 | { | |
2826 | /* The decl. */ | |
2827 | tree decl; | |
2828 | /* The level seen at (in_sizeof + in_typeof). */ | |
2829 | int level; | |
2830 | /* The next one at this level or above, or NULL. */ | |
2831 | struct maybe_used_decl *next; | |
2832 | }; | |
2833 | ||
2834 | static struct maybe_used_decl *maybe_used_decls; | |
2835 | ||
2836 | /* Record that DECL, an undefined static function reference seen | |
2837 | inside sizeof or typeof, might be used if the operand of sizeof is | |
2838 | a VLA type or the operand of typeof is a variably modified | |
2839 | type. */ | |
2840 | ||
4e2fb7de | 2841 | static void |
bc4b653b JM |
2842 | record_maybe_used_decl (tree decl) |
2843 | { | |
2844 | struct maybe_used_decl *t = XOBNEW (&parser_obstack, struct maybe_used_decl); | |
2845 | t->decl = decl; | |
2846 | t->level = in_sizeof + in_typeof; | |
2847 | t->next = maybe_used_decls; | |
2848 | maybe_used_decls = t; | |
2849 | } | |
2850 | ||
2851 | /* Pop the stack of decls possibly used inside sizeof or typeof. If | |
2852 | USED is false, just discard them. If it is true, mark them used | |
2853 | (if no longer inside sizeof or typeof) or move them to the next | |
2854 | level up (if still inside sizeof or typeof). */ | |
2855 | ||
2856 | void | |
2857 | pop_maybe_used (bool used) | |
2858 | { | |
2859 | struct maybe_used_decl *p = maybe_used_decls; | |
2860 | int cur_level = in_sizeof + in_typeof; | |
2861 | while (p && p->level > cur_level) | |
2862 | { | |
2863 | if (used) | |
2864 | { | |
2865 | if (cur_level == 0) | |
2866 | C_DECL_USED (p->decl) = 1; | |
2867 | else | |
2868 | p->level = cur_level; | |
2869 | } | |
2870 | p = p->next; | |
2871 | } | |
2872 | if (!used || cur_level == 0) | |
2873 | maybe_used_decls = p; | |
2874 | } | |
2875 | ||
2876 | /* Return the result of sizeof applied to EXPR. */ | |
2877 | ||
2878 | struct c_expr | |
c2255bc4 | 2879 | c_expr_sizeof_expr (location_t loc, struct c_expr expr) |
bc4b653b JM |
2880 | { |
2881 | struct c_expr ret; | |
ad97f4be JM |
2882 | if (expr.value == error_mark_node) |
2883 | { | |
2884 | ret.value = error_mark_node; | |
2885 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 2886 | ret.original_type = NULL; |
ad97f4be JM |
2887 | pop_maybe_used (false); |
2888 | } | |
2889 | else | |
2890 | { | |
928c19bb | 2891 | bool expr_const_operands = true; |
773ec47f MP |
2892 | |
2893 | if (TREE_CODE (expr.value) == PARM_DECL | |
2894 | && C_ARRAY_PARAMETER (expr.value)) | |
2895 | { | |
2896 | if (warning_at (loc, OPT_Wsizeof_array_argument, | |
2897 | "%<sizeof%> on array function parameter %qE will " | |
2898 | "return size of %qT", expr.value, | |
267bbb6f | 2899 | TREE_TYPE (expr.value))) |
773ec47f MP |
2900 | inform (DECL_SOURCE_LOCATION (expr.value), "declared here"); |
2901 | } | |
928c19bb JM |
2902 | tree folded_expr = c_fully_fold (expr.value, require_constant_value, |
2903 | &expr_const_operands); | |
c2255bc4 | 2904 | ret.value = c_sizeof (loc, TREE_TYPE (folded_expr)); |
1a4049e7 | 2905 | c_last_sizeof_arg = expr.value; |
40ffd95f | 2906 | c_last_sizeof_loc = loc; |
1a4049e7 | 2907 | ret.original_code = SIZEOF_EXPR; |
6866c6e8 | 2908 | ret.original_type = NULL; |
928c19bb | 2909 | if (c_vla_type_p (TREE_TYPE (folded_expr))) |
52ffd86e MS |
2910 | { |
2911 | /* sizeof is evaluated when given a vla (C99 6.5.3.4p2). */ | |
928c19bb JM |
2912 | ret.value = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (ret.value), |
2913 | folded_expr, ret.value); | |
2914 | C_MAYBE_CONST_EXPR_NON_CONST (ret.value) = !expr_const_operands; | |
c2255bc4 | 2915 | SET_EXPR_LOCATION (ret.value, loc); |
52ffd86e | 2916 | } |
928c19bb | 2917 | pop_maybe_used (C_TYPE_VARIABLE_SIZE (TREE_TYPE (folded_expr))); |
ad97f4be | 2918 | } |
bc4b653b JM |
2919 | return ret; |
2920 | } | |
2921 | ||
2922 | /* Return the result of sizeof applied to T, a structure for the type | |
c2255bc4 AH |
2923 | name passed to sizeof (rather than the type itself). LOC is the |
2924 | location of the original expression. */ | |
bc4b653b JM |
2925 | |
2926 | struct c_expr | |
c2255bc4 | 2927 | c_expr_sizeof_type (location_t loc, struct c_type_name *t) |
bc4b653b JM |
2928 | { |
2929 | tree type; | |
2930 | struct c_expr ret; | |
928c19bb JM |
2931 | tree type_expr = NULL_TREE; |
2932 | bool type_expr_const = true; | |
2933 | type = groktypename (t, &type_expr, &type_expr_const); | |
c2255bc4 | 2934 | ret.value = c_sizeof (loc, type); |
1a4049e7 | 2935 | c_last_sizeof_arg = type; |
40ffd95f | 2936 | c_last_sizeof_loc = loc; |
1a4049e7 | 2937 | ret.original_code = SIZEOF_EXPR; |
6866c6e8 | 2938 | ret.original_type = NULL; |
24070fcb JM |
2939 | if ((type_expr || TREE_CODE (ret.value) == INTEGER_CST) |
2940 | && c_vla_type_p (type)) | |
928c19bb | 2941 | { |
24070fcb JM |
2942 | /* If the type is a [*] array, it is a VLA but is represented as |
2943 | having a size of zero. In such a case we must ensure that | |
2944 | the result of sizeof does not get folded to a constant by | |
2945 | c_fully_fold, because if the size is evaluated the result is | |
2946 | not constant and so constraints on zero or negative size | |
2947 | arrays must not be applied when this sizeof call is inside | |
2948 | another array declarator. */ | |
2949 | if (!type_expr) | |
2950 | type_expr = integer_zero_node; | |
928c19bb JM |
2951 | ret.value = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (ret.value), |
2952 | type_expr, ret.value); | |
2953 | C_MAYBE_CONST_EXPR_NON_CONST (ret.value) = !type_expr_const; | |
2954 | } | |
16464cc1 VR |
2955 | pop_maybe_used (type != error_mark_node |
2956 | ? C_TYPE_VARIABLE_SIZE (type) : false); | |
bc4b653b JM |
2957 | return ret; |
2958 | } | |
2959 | ||
400fbf9f | 2960 | /* Build a function call to function FUNCTION with parameters PARAMS. |
c2255bc4 | 2961 | The function call is at LOC. |
400fbf9f JW |
2962 | PARAMS is a list--a chain of TREE_LIST nodes--in which the |
2963 | TREE_VALUE of each node is a parameter-expression. | |
2964 | FUNCTION's data type may be a function type or a pointer-to-function. */ | |
2965 | ||
2966 | tree | |
c2255bc4 | 2967 | build_function_call (location_t loc, tree function, tree params) |
bbbbb16a | 2968 | { |
9771b263 | 2969 | vec<tree, va_gc> *v; |
bbbbb16a ILT |
2970 | tree ret; |
2971 | ||
9771b263 | 2972 | vec_alloc (v, list_length (params)); |
bbbbb16a | 2973 | for (; params; params = TREE_CHAIN (params)) |
9771b263 | 2974 | v->quick_push (TREE_VALUE (params)); |
8edbfaa6 | 2975 | ret = c_build_function_call_vec (loc, vNULL, function, v, NULL); |
9771b263 | 2976 | vec_free (v); |
bbbbb16a ILT |
2977 | return ret; |
2978 | } | |
2979 | ||
ae52741c MLI |
2980 | /* Give a note about the location of the declaration of DECL. */ |
2981 | ||
c7b70a3c MP |
2982 | static void |
2983 | inform_declaration (tree decl) | |
ae52741c | 2984 | { |
c7b70a3c | 2985 | if (decl && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_IS_BUILTIN (decl))) |
ae52741c MLI |
2986 | inform (DECL_SOURCE_LOCATION (decl), "declared here"); |
2987 | } | |
2988 | ||
bbbbb16a ILT |
2989 | /* Build a function call to function FUNCTION with parameters PARAMS. |
2990 | ORIGTYPES, if not NULL, is a vector of types; each element is | |
2991 | either NULL or the original type of the corresponding element in | |
2992 | PARAMS. The original type may differ from TREE_TYPE of the | |
2993 | parameter for enums. FUNCTION's data type may be a function type | |
2994 | or pointer-to-function. This function changes the elements of | |
2995 | PARAMS. */ | |
2996 | ||
2997 | tree | |
81e5eca8 MP |
2998 | build_function_call_vec (location_t loc, vec<location_t> arg_loc, |
2999 | tree function, vec<tree, va_gc> *params, | |
9771b263 | 3000 | vec<tree, va_gc> *origtypes) |
400fbf9f | 3001 | { |
3fa8871b | 3002 | tree fntype, fundecl = NULL_TREE; |
4977bab6 | 3003 | tree name = NULL_TREE, result; |
c96f4f73 | 3004 | tree tem; |
94a0dd7b SL |
3005 | int nargs; |
3006 | tree *argarray; | |
b8698a0f | 3007 | |
400fbf9f | 3008 | |
fc76e425 | 3009 | /* Strip NON_LVALUE_EXPRs, etc., since we aren't using as an lvalue. */ |
a7d53fce | 3010 | STRIP_TYPE_NOPS (function); |
400fbf9f JW |
3011 | |
3012 | /* Convert anything with function type to a pointer-to-function. */ | |
3013 | if (TREE_CODE (function) == FUNCTION_DECL) | |
3014 | { | |
3015 | name = DECL_NAME (function); | |
0a35513e AH |
3016 | |
3017 | if (flag_tm) | |
3018 | tm_malloc_replacement (function); | |
a5eadacc | 3019 | fundecl = function; |
86951993 AM |
3020 | /* Atomic functions have type checking/casting already done. They are |
3021 | often rewritten and don't match the original parameter list. */ | |
3022 | if (name && !strncmp (IDENTIFIER_POINTER (name), "__atomic_", 9)) | |
3023 | origtypes = NULL; | |
400fbf9f | 3024 | } |
f2a71bbc | 3025 | if (TREE_CODE (TREE_TYPE (function)) == FUNCTION_TYPE) |
c2255bc4 | 3026 | function = function_to_pointer_conversion (loc, function); |
400fbf9f | 3027 | |
6e955430 ZL |
3028 | /* For Objective-C, convert any calls via a cast to OBJC_TYPE_REF |
3029 | expressions, like those used for ObjC messenger dispatches. */ | |
9771b263 DN |
3030 | if (params && !params->is_empty ()) |
3031 | function = objc_rewrite_function_call (function, (*params)[0]); | |
6e955430 | 3032 | |
928c19bb JM |
3033 | function = c_fully_fold (function, false, NULL); |
3034 | ||
400fbf9f JW |
3035 | fntype = TREE_TYPE (function); |
3036 | ||
3037 | if (TREE_CODE (fntype) == ERROR_MARK) | |
3038 | return error_mark_node; | |
3039 | ||
3040 | if (!(TREE_CODE (fntype) == POINTER_TYPE | |
3041 | && TREE_CODE (TREE_TYPE (fntype)) == FUNCTION_TYPE)) | |
3042 | { | |
ae52741c MLI |
3043 | if (!flag_diagnostics_show_caret) |
3044 | error_at (loc, | |
3045 | "called object %qE is not a function or function pointer", | |
3046 | function); | |
3047 | else if (DECL_P (function)) | |
3048 | { | |
3049 | error_at (loc, | |
3050 | "called object %qD is not a function or function pointer", | |
3051 | function); | |
3052 | inform_declaration (function); | |
3053 | } | |
3054 | else | |
3055 | error_at (loc, | |
3056 | "called object is not a function or function pointer"); | |
400fbf9f JW |
3057 | return error_mark_node; |
3058 | } | |
3059 | ||
5ce89b2e JM |
3060 | if (fundecl && TREE_THIS_VOLATILE (fundecl)) |
3061 | current_function_returns_abnormally = 1; | |
3062 | ||
400fbf9f JW |
3063 | /* fntype now gets the type of function pointed to. */ |
3064 | fntype = TREE_TYPE (fntype); | |
3065 | ||
ab4194da JM |
3066 | /* Convert the parameters to the types declared in the |
3067 | function prototype, or apply default promotions. */ | |
3068 | ||
81e5eca8 MP |
3069 | nargs = convert_arguments (loc, arg_loc, TYPE_ARG_TYPES (fntype), params, |
3070 | origtypes, function, fundecl); | |
ab4194da JM |
3071 | if (nargs < 0) |
3072 | return error_mark_node; | |
3073 | ||
c96f4f73 | 3074 | /* Check that the function is called through a compatible prototype. |
fa337f3a | 3075 | If it is not, warn. */ |
1043771b | 3076 | if (CONVERT_EXPR_P (function) |
c96f4f73 EB |
3077 | && TREE_CODE (tem = TREE_OPERAND (function, 0)) == ADDR_EXPR |
3078 | && TREE_CODE (tem = TREE_OPERAND (tem, 0)) == FUNCTION_DECL | |
3f75a254 | 3079 | && !comptypes (fntype, TREE_TYPE (tem))) |
c96f4f73 EB |
3080 | { |
3081 | tree return_type = TREE_TYPE (fntype); | |
c96f4f73 EB |
3082 | |
3083 | /* This situation leads to run-time undefined behavior. We can't, | |
3084 | therefore, simply error unless we can prove that all possible | |
3085 | executions of the program must execute the code. */ | |
fa337f3a | 3086 | warning_at (loc, 0, "function called through a non-compatible type"); |
c96f4f73 | 3087 | |
fa337f3a RB |
3088 | if (VOID_TYPE_P (return_type) |
3089 | && TYPE_QUALS (return_type) != TYPE_UNQUALIFIED) | |
3090 | pedwarn (loc, 0, | |
3091 | "function with qualified void return type called"); | |
3092 | } | |
c96f4f73 | 3093 | |
9771b263 | 3094 | argarray = vec_safe_address (params); |
bbbbb16a | 3095 | |
83322951 RG |
3096 | /* Check that arguments to builtin functions match the expectations. */ |
3097 | if (fundecl | |
3098 | && DECL_BUILT_IN (fundecl) | |
3099 | && DECL_BUILT_IN_CLASS (fundecl) == BUILT_IN_NORMAL | |
79ce98bc MP |
3100 | && !check_builtin_function_arguments (loc, arg_loc, fundecl, nargs, |
3101 | argarray)) | |
83322951 | 3102 | return error_mark_node; |
400fbf9f | 3103 | |
83322951 | 3104 | /* Check that the arguments to the function are valid. */ |
4227c9ad | 3105 | bool warned_p = check_function_arguments (loc, fundecl, fntype, |
2f687306 | 3106 | nargs, argarray, &arg_loc); |
400fbf9f | 3107 | |
928c19bb JM |
3108 | if (name != NULL_TREE |
3109 | && !strncmp (IDENTIFIER_POINTER (name), "__builtin_", 10)) | |
bf730f15 | 3110 | { |
928c19bb | 3111 | if (require_constant_value) |
0dba7960 JJ |
3112 | result |
3113 | = fold_build_call_array_initializer_loc (loc, TREE_TYPE (fntype), | |
3114 | function, nargs, argarray); | |
928c19bb | 3115 | else |
db3927fb AH |
3116 | result = fold_build_call_array_loc (loc, TREE_TYPE (fntype), |
3117 | function, nargs, argarray); | |
928c19bb JM |
3118 | if (TREE_CODE (result) == NOP_EXPR |
3119 | && TREE_CODE (TREE_OPERAND (result, 0)) == INTEGER_CST) | |
3120 | STRIP_TYPE_NOPS (result); | |
bf730f15 RS |
3121 | } |
3122 | else | |
db3927fb AH |
3123 | result = build_call_array_loc (loc, TREE_TYPE (fntype), |
3124 | function, nargs, argarray); | |
0dba7960 JJ |
3125 | /* If -Wnonnull warning has been diagnosed, avoid diagnosing it again |
3126 | later. */ | |
3127 | if (warned_p && TREE_CODE (result) == CALL_EXPR) | |
3128 | TREE_NO_WARNING (result) = 1; | |
b0b3afb2 | 3129 | |
ab4c578f MP |
3130 | /* In this improbable scenario, a nested function returns a VM type. |
3131 | Create a TARGET_EXPR so that the call always has a LHS, much as | |
3132 | what the C++ FE does for functions returning non-PODs. */ | |
3133 | if (variably_modified_type_p (TREE_TYPE (fntype), NULL_TREE)) | |
3134 | { | |
3135 | tree tmp = create_tmp_var_raw (TREE_TYPE (fntype)); | |
3136 | result = build4 (TARGET_EXPR, TREE_TYPE (fntype), tmp, result, | |
3137 | NULL_TREE, NULL_TREE); | |
3138 | } | |
3139 | ||
71653180 | 3140 | if (VOID_TYPE_P (TREE_TYPE (result))) |
3ce62965 JM |
3141 | { |
3142 | if (TYPE_QUALS (TREE_TYPE (result)) != TYPE_UNQUALIFIED) | |
db3927fb | 3143 | pedwarn (loc, 0, |
3ce62965 JM |
3144 | "function with qualified void return type called"); |
3145 | return result; | |
3146 | } | |
4f2e1536 | 3147 | return require_complete_type (loc, result); |
400fbf9f | 3148 | } |
8edbfaa6 JJ |
3149 | |
3150 | /* Like build_function_call_vec, but call also resolve_overloaded_builtin. */ | |
3151 | ||
3152 | tree | |
3153 | c_build_function_call_vec (location_t loc, vec<location_t> arg_loc, | |
3154 | tree function, vec<tree, va_gc> *params, | |
3155 | vec<tree, va_gc> *origtypes) | |
3156 | { | |
3157 | /* Strip NON_LVALUE_EXPRs, etc., since we aren't using as an lvalue. */ | |
3158 | STRIP_TYPE_NOPS (function); | |
3159 | ||
3160 | /* Convert anything with function type to a pointer-to-function. */ | |
3161 | if (TREE_CODE (function) == FUNCTION_DECL) | |
3162 | { | |
3163 | /* Implement type-directed function overloading for builtins. | |
3164 | resolve_overloaded_builtin and targetm.resolve_overloaded_builtin | |
3165 | handle all the type checking. The result is a complete expression | |
3166 | that implements this function call. */ | |
3167 | tree tem = resolve_overloaded_builtin (loc, function, params); | |
3168 | if (tem) | |
3169 | return tem; | |
3170 | } | |
3171 | return build_function_call_vec (loc, arg_loc, function, params, origtypes); | |
3172 | } | |
400fbf9f | 3173 | \f |
bbbbb16a ILT |
3174 | /* Convert the argument expressions in the vector VALUES |
3175 | to the types in the list TYPELIST. | |
400fbf9f JW |
3176 | |
3177 | If TYPELIST is exhausted, or when an element has NULL as its type, | |
3178 | perform the default conversions. | |
3179 | ||
bbbbb16a ILT |
3180 | ORIGTYPES is the original types of the expressions in VALUES. This |
3181 | holds the type of enum values which have been converted to integral | |
3182 | types. It may be NULL. | |
400fbf9f | 3183 | |
03dafa61 JM |
3184 | FUNCTION is a tree for the called function. It is used only for |
3185 | error messages, where it is formatted with %qE. | |
400fbf9f JW |
3186 | |
3187 | This is also where warnings about wrong number of args are generated. | |
3188 | ||
81e5eca8 MP |
3189 | ARG_LOC are locations of function arguments (if any). |
3190 | ||
94a0dd7b | 3191 | Returns the actual number of arguments processed (which may be less |
bbbbb16a ILT |
3192 | than the length of VALUES in some error situations), or -1 on |
3193 | failure. */ | |
94a0dd7b SL |
3194 | |
3195 | static int | |
81e5eca8 MP |
3196 | convert_arguments (location_t loc, vec<location_t> arg_loc, tree typelist, |
3197 | vec<tree, va_gc> *values, vec<tree, va_gc> *origtypes, | |
3198 | tree function, tree fundecl) | |
400fbf9f | 3199 | { |
bbbbb16a ILT |
3200 | tree typetail, val; |
3201 | unsigned int parmnum; | |
06302a02 | 3202 | bool error_args = false; |
b5d32c25 | 3203 | const bool type_generic = fundecl |
81e5eca8 | 3204 | && lookup_attribute ("type generic", TYPE_ATTRIBUTES (TREE_TYPE (fundecl))); |
8ce94e44 | 3205 | bool type_generic_remove_excess_precision = false; |
44a845ca | 3206 | bool type_generic_overflow_p = false; |
03dafa61 | 3207 | tree selector; |
03dafa61 | 3208 | |
2ac2f164 JM |
3209 | /* Change pointer to function to the function itself for |
3210 | diagnostics. */ | |
03dafa61 JM |
3211 | if (TREE_CODE (function) == ADDR_EXPR |
3212 | && TREE_CODE (TREE_OPERAND (function, 0)) == FUNCTION_DECL) | |
2ac2f164 | 3213 | function = TREE_OPERAND (function, 0); |
03dafa61 JM |
3214 | |
3215 | /* Handle an ObjC selector specially for diagnostics. */ | |
3216 | selector = objc_message_selector (); | |
400fbf9f | 3217 | |
8ce94e44 JM |
3218 | /* For type-generic built-in functions, determine whether excess |
3219 | precision should be removed (classification) or not | |
3220 | (comparison). */ | |
3221 | if (type_generic | |
3222 | && DECL_BUILT_IN (fundecl) | |
3223 | && DECL_BUILT_IN_CLASS (fundecl) == BUILT_IN_NORMAL) | |
3224 | { | |
3225 | switch (DECL_FUNCTION_CODE (fundecl)) | |
3226 | { | |
3227 | case BUILT_IN_ISFINITE: | |
3228 | case BUILT_IN_ISINF: | |
3229 | case BUILT_IN_ISINF_SIGN: | |
3230 | case BUILT_IN_ISNAN: | |
3231 | case BUILT_IN_ISNORMAL: | |
3232 | case BUILT_IN_FPCLASSIFY: | |
3233 | type_generic_remove_excess_precision = true; | |
3234 | break; | |
3235 | ||
44a845ca MS |
3236 | case BUILT_IN_ADD_OVERFLOW_P: |
3237 | case BUILT_IN_SUB_OVERFLOW_P: | |
3238 | case BUILT_IN_MUL_OVERFLOW_P: | |
3239 | /* The last argument of these type-generic builtins | |
3240 | should not be promoted. */ | |
3241 | type_generic_overflow_p = true; | |
3242 | break; | |
3243 | ||
8ce94e44 | 3244 | default: |
8ce94e44 JM |
3245 | break; |
3246 | } | |
3247 | } | |
3248 | ||
400fbf9f | 3249 | /* Scan the given expressions and types, producing individual |
bbbbb16a | 3250 | converted arguments. */ |
400fbf9f | 3251 | |
bbbbb16a | 3252 | for (typetail = typelist, parmnum = 0; |
9771b263 | 3253 | values && values->iterate (parmnum, &val); |
bbbbb16a | 3254 | ++parmnum) |
400fbf9f | 3255 | { |
b3694847 | 3256 | tree type = typetail ? TREE_VALUE (typetail) : 0; |
8ce94e44 | 3257 | tree valtype = TREE_TYPE (val); |
03dafa61 JM |
3258 | tree rname = function; |
3259 | int argnum = parmnum + 1; | |
4d3e6fae | 3260 | const char *invalid_func_diag; |
8ce94e44 | 3261 | bool excess_precision = false; |
928c19bb | 3262 | bool npc; |
bbbbb16a | 3263 | tree parmval; |
5c1bc275 MP |
3264 | /* Some __atomic_* builtins have additional hidden argument at |
3265 | position 0. */ | |
3266 | location_t ploc | |
3267 | = !arg_loc.is_empty () && values->length () == arg_loc.length () | |
3268 | ? expansion_point_location_if_in_system_header (arg_loc[parmnum]) | |
3269 | : input_location; | |
400fbf9f JW |
3270 | |
3271 | if (type == void_type_node) | |
3272 | { | |
19dc6d01 | 3273 | if (selector) |
68fca595 | 3274 | error_at (loc, "too many arguments to method %qE", selector); |
19dc6d01 | 3275 | else |
68fca595 | 3276 | error_at (loc, "too many arguments to function %qE", function); |
ae52741c | 3277 | inform_declaration (fundecl); |
d38f7dce | 3278 | return error_args ? -1 : (int) parmnum; |
400fbf9f JW |
3279 | } |
3280 | ||
03dafa61 JM |
3281 | if (selector && argnum > 2) |
3282 | { | |
3283 | rname = selector; | |
3284 | argnum -= 2; | |
3285 | } | |
3286 | ||
928c19bb | 3287 | npc = null_pointer_constant_p (val); |
8ce94e44 JM |
3288 | |
3289 | /* If there is excess precision and a prototype, convert once to | |
3290 | the required type rather than converting via the semantic | |
3291 | type. Likewise without a prototype a float value represented | |
3292 | as long double should be converted once to double. But for | |
3293 | type-generic classification functions excess precision must | |
3294 | be removed here. */ | |
3295 | if (TREE_CODE (val) == EXCESS_PRECISION_EXPR | |
3296 | && (type || !type_generic || !type_generic_remove_excess_precision)) | |
3297 | { | |
3298 | val = TREE_OPERAND (val, 0); | |
3299 | excess_precision = true; | |
3300 | } | |
928c19bb | 3301 | val = c_fully_fold (val, false, NULL); |
ed248cf7 | 3302 | STRIP_TYPE_NOPS (val); |
400fbf9f | 3303 | |
4f2e1536 | 3304 | val = require_complete_type (ploc, val); |
400fbf9f | 3305 | |
c65699ef JM |
3306 | /* Some floating-point arguments must be promoted to double when |
3307 | no type is specified by a prototype. This applies to | |
3308 | arguments of type float, and to architecture-specific types | |
3309 | (ARM __fp16), but not to _FloatN or _FloatNx types. */ | |
3310 | bool promote_float_arg = false; | |
3311 | if (type == NULL_TREE | |
3312 | && TREE_CODE (valtype) == REAL_TYPE | |
3313 | && (TYPE_PRECISION (valtype) | |
3314 | <= TYPE_PRECISION (double_type_node)) | |
3315 | && TYPE_MAIN_VARIANT (valtype) != double_type_node | |
3316 | && TYPE_MAIN_VARIANT (valtype) != long_double_type_node | |
3317 | && !DECIMAL_FLOAT_MODE_P (TYPE_MODE (valtype))) | |
3318 | { | |
3319 | /* Promote this argument, unless it has a _FloatN or | |
3320 | _FloatNx type. */ | |
3321 | promote_float_arg = true; | |
3322 | for (int i = 0; i < NUM_FLOATN_NX_TYPES; i++) | |
3323 | if (TYPE_MAIN_VARIANT (valtype) == FLOATN_NX_TYPE_NODE (i)) | |
3324 | { | |
3325 | promote_float_arg = false; | |
3326 | break; | |
3327 | } | |
3328 | } | |
3329 | ||
3fa8871b | 3330 | if (type != NULL_TREE) |
400fbf9f JW |
3331 | { |
3332 | /* Formal parm type is specified by a function prototype. */ | |
400fbf9f | 3333 | |
20913689 | 3334 | if (type == error_mark_node || !COMPLETE_TYPE_P (type)) |
400fbf9f | 3335 | { |
5c1bc275 MP |
3336 | error_at (ploc, "type of formal parameter %d is incomplete", |
3337 | parmnum + 1); | |
400fbf9f JW |
3338 | parmval = val; |
3339 | } | |
3340 | else | |
3341 | { | |
bbbbb16a ILT |
3342 | tree origtype; |
3343 | ||
d45cf215 RS |
3344 | /* Optionally warn about conversions that |
3345 | differ from the default conversions. */ | |
05170031 | 3346 | if (warn_traditional_conversion || warn_traditional) |
400fbf9f | 3347 | { |
e3a64162 | 3348 | unsigned int formal_prec = TYPE_PRECISION (type); |
400fbf9f | 3349 | |
aae43c5f | 3350 | if (INTEGRAL_TYPE_P (type) |
8ce94e44 | 3351 | && TREE_CODE (valtype) == REAL_TYPE) |
5c1bc275 MP |
3352 | warning_at (ploc, OPT_Wtraditional_conversion, |
3353 | "passing argument %d of %qE as integer rather " | |
3354 | "than floating due to prototype", | |
3355 | argnum, rname); | |
03829ad2 | 3356 | if (INTEGRAL_TYPE_P (type) |
8ce94e44 | 3357 | && TREE_CODE (valtype) == COMPLEX_TYPE) |
5c1bc275 MP |
3358 | warning_at (ploc, OPT_Wtraditional_conversion, |
3359 | "passing argument %d of %qE as integer rather " | |
3360 | "than complex due to prototype", | |
3361 | argnum, rname); | |
aae43c5f | 3362 | else if (TREE_CODE (type) == COMPLEX_TYPE |
8ce94e44 | 3363 | && TREE_CODE (valtype) == REAL_TYPE) |
5c1bc275 MP |
3364 | warning_at (ploc, OPT_Wtraditional_conversion, |
3365 | "passing argument %d of %qE as complex rather " | |
3366 | "than floating due to prototype", | |
3367 | argnum, rname); | |
400fbf9f | 3368 | else if (TREE_CODE (type) == REAL_TYPE |
8ce94e44 | 3369 | && INTEGRAL_TYPE_P (valtype)) |
5c1bc275 MP |
3370 | warning_at (ploc, OPT_Wtraditional_conversion, |
3371 | "passing argument %d of %qE as floating rather " | |
3372 | "than integer due to prototype", | |
3373 | argnum, rname); | |
03829ad2 | 3374 | else if (TREE_CODE (type) == COMPLEX_TYPE |
8ce94e44 | 3375 | && INTEGRAL_TYPE_P (valtype)) |
5c1bc275 MP |
3376 | warning_at (ploc, OPT_Wtraditional_conversion, |
3377 | "passing argument %d of %qE as complex rather " | |
3378 | "than integer due to prototype", | |
3379 | argnum, rname); | |
aae43c5f | 3380 | else if (TREE_CODE (type) == REAL_TYPE |
8ce94e44 | 3381 | && TREE_CODE (valtype) == COMPLEX_TYPE) |
5c1bc275 MP |
3382 | warning_at (ploc, OPT_Wtraditional_conversion, |
3383 | "passing argument %d of %qE as floating rather " | |
3384 | "than complex due to prototype", | |
3385 | argnum, rname); | |
aae43c5f RK |
3386 | /* ??? At some point, messages should be written about |
3387 | conversions between complex types, but that's too messy | |
3388 | to do now. */ | |
d45cf215 | 3389 | else if (TREE_CODE (type) == REAL_TYPE |
8ce94e44 | 3390 | && TREE_CODE (valtype) == REAL_TYPE) |
d45cf215 RS |
3391 | { |
3392 | /* Warn if any argument is passed as `float', | |
047de90b | 3393 | since without a prototype it would be `double'. */ |
9a8ce21f JG |
3394 | if (formal_prec == TYPE_PRECISION (float_type_node) |
3395 | && type != dfloat32_type_node) | |
5c1bc275 MP |
3396 | warning_at (ploc, 0, |
3397 | "passing argument %d of %qE as %<float%> " | |
3398 | "rather than %<double%> due to prototype", | |
3399 | argnum, rname); | |
9a8ce21f JG |
3400 | |
3401 | /* Warn if mismatch between argument and prototype | |
3402 | for decimal float types. Warn of conversions with | |
3403 | binary float types and of precision narrowing due to | |
3404 | prototype. */ | |
8ce94e44 | 3405 | else if (type != valtype |
9a8ce21f JG |
3406 | && (type == dfloat32_type_node |
3407 | || type == dfloat64_type_node | |
c22cacf3 | 3408 | || type == dfloat128_type_node |
8ce94e44 JM |
3409 | || valtype == dfloat32_type_node |
3410 | || valtype == dfloat64_type_node | |
3411 | || valtype == dfloat128_type_node) | |
c22cacf3 | 3412 | && (formal_prec |
8ce94e44 | 3413 | <= TYPE_PRECISION (valtype) |
9a8ce21f | 3414 | || (type == dfloat128_type_node |
8ce94e44 | 3415 | && (valtype |
c22cacf3 | 3416 | != dfloat64_type_node |
8ce94e44 | 3417 | && (valtype |
9a8ce21f JG |
3418 | != dfloat32_type_node))) |
3419 | || (type == dfloat64_type_node | |
8ce94e44 | 3420 | && (valtype |
9a8ce21f | 3421 | != dfloat32_type_node)))) |
5c1bc275 MP |
3422 | warning_at (ploc, 0, |
3423 | "passing argument %d of %qE as %qT " | |
3424 | "rather than %qT due to prototype", | |
3425 | argnum, rname, type, valtype); | |
9a8ce21f | 3426 | |
d45cf215 | 3427 | } |
3ed56f8a KG |
3428 | /* Detect integer changing in width or signedness. |
3429 | These warnings are only activated with | |
05170031 | 3430 | -Wtraditional-conversion, not with -Wtraditional. */ |
61ac5ebe MP |
3431 | else if (warn_traditional_conversion |
3432 | && INTEGRAL_TYPE_P (type) | |
8ce94e44 | 3433 | && INTEGRAL_TYPE_P (valtype)) |
400fbf9f | 3434 | { |
d45cf215 RS |
3435 | tree would_have_been = default_conversion (val); |
3436 | tree type1 = TREE_TYPE (would_have_been); | |
3437 | ||
61ac5ebe MP |
3438 | if (val == error_mark_node) |
3439 | /* VAL could have been of incomplete type. */; | |
3440 | else if (TREE_CODE (type) == ENUMERAL_TYPE | |
3441 | && (TYPE_MAIN_VARIANT (type) | |
3442 | == TYPE_MAIN_VARIANT (valtype))) | |
754a4d82 RS |
3443 | /* No warning if function asks for enum |
3444 | and the actual arg is that enum type. */ | |
3445 | ; | |
3446 | else if (formal_prec != TYPE_PRECISION (type1)) | |
5c1bc275 MP |
3447 | warning_at (ploc, OPT_Wtraditional_conversion, |
3448 | "passing argument %d of %qE " | |
3449 | "with different width due to prototype", | |
3450 | argnum, rname); | |
8df83eae | 3451 | else if (TYPE_UNSIGNED (type) == TYPE_UNSIGNED (type1)) |
d45cf215 | 3452 | ; |
800cd3b9 RS |
3453 | /* Don't complain if the formal parameter type |
3454 | is an enum, because we can't tell now whether | |
3455 | the value was an enum--even the same enum. */ | |
3456 | else if (TREE_CODE (type) == ENUMERAL_TYPE) | |
3457 | ; | |
400fbf9f JW |
3458 | else if (TREE_CODE (val) == INTEGER_CST |
3459 | && int_fits_type_p (val, type)) | |
3460 | /* Change in signedness doesn't matter | |
3461 | if a constant value is unaffected. */ | |
3462 | ; | |
ce9895ae RS |
3463 | /* If the value is extended from a narrower |
3464 | unsigned type, it doesn't matter whether we | |
3465 | pass it as signed or unsigned; the value | |
3466 | certainly is the same either way. */ | |
8ce94e44 JM |
3467 | else if (TYPE_PRECISION (valtype) < TYPE_PRECISION (type) |
3468 | && TYPE_UNSIGNED (valtype)) | |
ce9895ae | 3469 | ; |
8df83eae | 3470 | else if (TYPE_UNSIGNED (type)) |
5c1bc275 MP |
3471 | warning_at (ploc, OPT_Wtraditional_conversion, |
3472 | "passing argument %d of %qE " | |
3473 | "as unsigned due to prototype", | |
3474 | argnum, rname); | |
3ed56f8a | 3475 | else |
5c1bc275 MP |
3476 | warning_at (ploc, OPT_Wtraditional_conversion, |
3477 | "passing argument %d of %qE " | |
3478 | "as signed due to prototype", | |
3479 | argnum, rname); | |
400fbf9f JW |
3480 | } |
3481 | } | |
3482 | ||
8ce94e44 JM |
3483 | /* Possibly restore an EXCESS_PRECISION_EXPR for the |
3484 | sake of better warnings from convert_and_check. */ | |
3485 | if (excess_precision) | |
3486 | val = build1 (EXCESS_PRECISION_EXPR, valtype, val); | |
9771b263 | 3487 | origtype = (!origtypes) ? NULL_TREE : (*origtypes)[parmnum]; |
5c1bc275 | 3488 | parmval = convert_for_assignment (loc, ploc, type, |
68fca595 MP |
3489 | val, origtype, ic_argpass, |
3490 | npc, fundecl, function, | |
2ac2f164 | 3491 | parmnum + 1); |
2f6e4e97 | 3492 | |
61f71b34 | 3493 | if (targetm.calls.promote_prototypes (fundecl ? TREE_TYPE (fundecl) : 0) |
b6d6aa84 | 3494 | && INTEGRAL_TYPE_P (type) |
400fbf9f JW |
3495 | && (TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))) |
3496 | parmval = default_conversion (parmval); | |
400fbf9f | 3497 | } |
400fbf9f | 3498 | } |
c65699ef | 3499 | else if (promote_float_arg) |
b5d32c25 KG |
3500 | { |
3501 | if (type_generic) | |
bbbbb16a | 3502 | parmval = val; |
b5d32c25 | 3503 | else |
0a0b3574 MM |
3504 | { |
3505 | /* Convert `float' to `double'. */ | |
3506 | if (warn_double_promotion && !c_inhibit_evaluation_warnings) | |
5c1bc275 MP |
3507 | warning_at (ploc, OPT_Wdouble_promotion, |
3508 | "implicit conversion from %qT to %qT when passing " | |
3509 | "argument to function", | |
3510 | valtype, double_type_node); | |
0a0b3574 MM |
3511 | parmval = convert (double_type_node, val); |
3512 | } | |
b5d32c25 | 3513 | } |
44a845ca MS |
3514 | else if ((excess_precision && !type_generic) |
3515 | || (type_generic_overflow_p && parmnum == 2)) | |
8ce94e44 | 3516 | /* A "double" argument with excess precision being passed |
44a845ca MS |
3517 | without a prototype or in variable arguments. |
3518 | The last argument of __builtin_*_overflow_p should not be | |
3519 | promoted. */ | |
bbbbb16a | 3520 | parmval = convert (valtype, val); |
c22cacf3 MS |
3521 | else if ((invalid_func_diag = |
3522 | targetm.calls.invalid_arg_for_unprototyped_fn (typelist, fundecl, val))) | |
4d3e6fae FJ |
3523 | { |
3524 | error (invalid_func_diag); | |
94a0dd7b | 3525 | return -1; |
4d3e6fae | 3526 | } |
1807ffc1 MS |
3527 | else if (TREE_CODE (val) == ADDR_EXPR && reject_gcc_builtin (val)) |
3528 | { | |
3529 | return -1; | |
3530 | } | |
400fbf9f JW |
3531 | else |
3532 | /* Convert `short' and `char' to full-size `int'. */ | |
bbbbb16a ILT |
3533 | parmval = default_conversion (val); |
3534 | ||
9771b263 | 3535 | (*values)[parmnum] = parmval; |
06302a02 JJ |
3536 | if (parmval == error_mark_node) |
3537 | error_args = true; | |
400fbf9f JW |
3538 | |
3539 | if (typetail) | |
3540 | typetail = TREE_CHAIN (typetail); | |
3541 | } | |
3542 | ||
9771b263 | 3543 | gcc_assert (parmnum == vec_safe_length (values)); |
94a0dd7b | 3544 | |
3fa8871b | 3545 | if (typetail != NULL_TREE && TREE_VALUE (typetail) != void_type_node) |
3789b316 | 3546 | { |
68fca595 | 3547 | error_at (loc, "too few arguments to function %qE", function); |
6d6efbb3 BI |
3548 | inform_declaration (fundecl); |
3549 | return -1; | |
3789b316 | 3550 | } |
400fbf9f | 3551 | |
06302a02 | 3552 | return error_args ? -1 : (int) parmnum; |
400fbf9f JW |
3553 | } |
3554 | \f | |
43f6dfd3 RS |
3555 | /* This is the entry point used by the parser to build unary operators |
3556 | in the input. CODE, a tree_code, specifies the unary operator, and | |
3557 | ARG is the operand. For unary plus, the C parser currently uses | |
6a3799eb AH |
3558 | CONVERT_EXPR for code. |
3559 | ||
3560 | LOC is the location to use for the tree generated. | |
3561 | */ | |
43f6dfd3 RS |
3562 | |
3563 | struct c_expr | |
c2255bc4 | 3564 | parser_build_unary_op (location_t loc, enum tree_code code, struct c_expr arg) |
43f6dfd3 RS |
3565 | { |
3566 | struct c_expr result; | |
3567 | ||
100d537d | 3568 | result.original_code = code; |
6866c6e8 ILT |
3569 | result.original_type = NULL; |
3570 | ||
1807ffc1 MS |
3571 | if (reject_gcc_builtin (arg.value)) |
3572 | { | |
3573 | result.value = error_mark_node; | |
3574 | } | |
3575 | else | |
3576 | { | |
e51fbec3 | 3577 | result.value = build_unary_op (loc, code, arg.value, false); |
1807ffc1 | 3578 | |
e9892350 | 3579 | if (TREE_OVERFLOW_P (result.value) && !TREE_OVERFLOW_P (arg.value)) |
3cd211af | 3580 | overflow_warning (loc, result.value, arg.value); |
1807ffc1 | 3581 | } |
59c0753d | 3582 | |
ebedc9a3 DM |
3583 | /* We are typically called when parsing a prefix token at LOC acting on |
3584 | ARG. Reflect this by updating the source range of the result to | |
3585 | start at LOC and end at the end of ARG. */ | |
3586 | set_c_expr_source_range (&result, | |
3587 | loc, arg.get_finish ()); | |
3588 | ||
43f6dfd3 RS |
3589 | return result; |
3590 | } | |
3591 | ||
a9342885 MP |
3592 | /* Returns true if TYPE is a character type, *not* including wchar_t. */ |
3593 | ||
3594 | static bool | |
3595 | char_type_p (tree type) | |
3596 | { | |
3597 | return (type == char_type_node | |
3598 | || type == unsigned_char_type_node | |
3599 | || type == signed_char_type_node | |
3600 | || type == char16_type_node | |
3601 | || type == char32_type_node); | |
3602 | } | |
3603 | ||
43f6dfd3 RS |
3604 | /* This is the entry point used by the parser to build binary operators |
3605 | in the input. CODE, a tree_code, specifies the binary operator, and | |
3606 | ARG1 and ARG2 are the operands. In addition to constructing the | |
3607 | expression, we check for operands that were written with other binary | |
ba47d38d AH |
3608 | operators in a way that is likely to confuse the user. |
3609 | ||
3610 | LOCATION is the location of the binary operator. */ | |
edc7c4ec | 3611 | |
487a92fe | 3612 | struct c_expr |
ba47d38d AH |
3613 | parser_build_binary_op (location_t location, enum tree_code code, |
3614 | struct c_expr arg1, struct c_expr arg2) | |
400fbf9f | 3615 | { |
487a92fe | 3616 | struct c_expr result; |
400fbf9f | 3617 | |
487a92fe JM |
3618 | enum tree_code code1 = arg1.original_code; |
3619 | enum tree_code code2 = arg2.original_code; | |
6866c6e8 ILT |
3620 | tree type1 = (arg1.original_type |
3621 | ? arg1.original_type | |
3622 | : TREE_TYPE (arg1.value)); | |
3623 | tree type2 = (arg2.original_type | |
3624 | ? arg2.original_type | |
3625 | : TREE_TYPE (arg2.value)); | |
400fbf9f | 3626 | |
ba47d38d | 3627 | result.value = build_binary_op (location, code, |
30af3a2b | 3628 | arg1.value, arg2.value, true); |
487a92fe | 3629 | result.original_code = code; |
6866c6e8 | 3630 | result.original_type = NULL; |
58bf601b | 3631 | |
487a92fe | 3632 | if (TREE_CODE (result.value) == ERROR_MARK) |
8a40fef3 DM |
3633 | { |
3634 | set_c_expr_source_range (&result, | |
3635 | arg1.get_start (), | |
3636 | arg2.get_finish ()); | |
3637 | return result; | |
3638 | } | |
400fbf9f | 3639 | |
ba47d38d AH |
3640 | if (location != UNKNOWN_LOCATION) |
3641 | protected_set_expr_location (result.value, location); | |
3642 | ||
ebedc9a3 DM |
3643 | set_c_expr_source_range (&result, |
3644 | arg1.get_start (), | |
3645 | arg2.get_finish ()); | |
3646 | ||
400fbf9f | 3647 | /* Check for cases such as x+y<<z which users are likely |
487a92fe | 3648 | to misinterpret. */ |
400fbf9f | 3649 | if (warn_parentheses) |
393e8e8b MP |
3650 | warn_about_parentheses (location, code, code1, arg1.value, code2, |
3651 | arg2.value); | |
001af587 | 3652 | |
ca409efd | 3653 | if (warn_logical_op) |
393e8e8b | 3654 | warn_logical_operator (location, code, TREE_TYPE (result.value), |
ca409efd | 3655 | code1, arg1.value, code2, arg2.value); |
63a08740 | 3656 | |
05b28fd6 | 3657 | if (warn_tautological_compare) |
433068cc MP |
3658 | { |
3659 | tree lhs = arg1.value; | |
3660 | tree rhs = arg2.value; | |
3661 | if (TREE_CODE (lhs) == C_MAYBE_CONST_EXPR) | |
3662 | { | |
3663 | if (C_MAYBE_CONST_EXPR_PRE (lhs) != NULL_TREE | |
3664 | && TREE_SIDE_EFFECTS (C_MAYBE_CONST_EXPR_PRE (lhs))) | |
3665 | lhs = NULL_TREE; | |
3666 | else | |
3667 | lhs = C_MAYBE_CONST_EXPR_EXPR (lhs); | |
3668 | } | |
3669 | if (TREE_CODE (rhs) == C_MAYBE_CONST_EXPR) | |
3670 | { | |
3671 | if (C_MAYBE_CONST_EXPR_PRE (rhs) != NULL_TREE | |
3672 | && TREE_SIDE_EFFECTS (C_MAYBE_CONST_EXPR_PRE (rhs))) | |
3673 | rhs = NULL_TREE; | |
3674 | else | |
3675 | rhs = C_MAYBE_CONST_EXPR_EXPR (rhs); | |
3676 | } | |
3677 | if (lhs != NULL_TREE && rhs != NULL_TREE) | |
3678 | warn_tautological_cmp (location, code, lhs, rhs); | |
3679 | } | |
05b28fd6 | 3680 | |
742938c9 | 3681 | if (warn_logical_not_paren |
7ccb1a11 | 3682 | && TREE_CODE_CLASS (code) == tcc_comparison |
47c2554f | 3683 | && code1 == TRUTH_NOT_EXPR |
01177669 JJ |
3684 | && code2 != TRUTH_NOT_EXPR |
3685 | /* Avoid warning for !!x == y. */ | |
3686 | && (TREE_CODE (arg1.value) != NE_EXPR | |
3687 | || !integer_zerop (TREE_OPERAND (arg1.value, 1)))) | |
3688 | { | |
3689 | /* Avoid warning for !b == y where b has _Bool type. */ | |
3690 | tree t = integer_zero_node; | |
3691 | if (TREE_CODE (arg1.value) == EQ_EXPR | |
3692 | && integer_zerop (TREE_OPERAND (arg1.value, 1)) | |
3693 | && TREE_TYPE (TREE_OPERAND (arg1.value, 0)) == integer_type_node) | |
3694 | { | |
3695 | t = TREE_OPERAND (arg1.value, 0); | |
3696 | do | |
3697 | { | |
3698 | if (TREE_TYPE (t) != integer_type_node) | |
3699 | break; | |
3700 | if (TREE_CODE (t) == C_MAYBE_CONST_EXPR) | |
3701 | t = C_MAYBE_CONST_EXPR_EXPR (t); | |
3702 | else if (CONVERT_EXPR_P (t)) | |
3703 | t = TREE_OPERAND (t, 0); | |
3704 | else | |
3705 | break; | |
3706 | } | |
3707 | while (1); | |
3708 | } | |
3709 | if (TREE_CODE (TREE_TYPE (t)) != BOOLEAN_TYPE) | |
ebef225f | 3710 | warn_logical_not_parentheses (location, code, arg1.value, arg2.value); |
01177669 | 3711 | } |
742938c9 | 3712 | |
e994a705 RS |
3713 | /* Warn about comparisons against string literals, with the exception |
3714 | of testing for equality or inequality of a string literal with NULL. */ | |
3715 | if (code == EQ_EXPR || code == NE_EXPR) | |
3716 | { | |
66756373 JJ |
3717 | if ((code1 == STRING_CST |
3718 | && !integer_zerop (tree_strip_nop_conversions (arg2.value))) | |
3719 | || (code2 == STRING_CST | |
3720 | && !integer_zerop (tree_strip_nop_conversions (arg1.value)))) | |
c2255bc4 AH |
3721 | warning_at (location, OPT_Waddress, |
3722 | "comparison with string literal results in unspecified behavior"); | |
a9342885 MP |
3723 | /* Warn for ptr == '\0', it's likely that it should've been ptr[0]. */ |
3724 | if (POINTER_TYPE_P (type1) | |
3725 | && null_pointer_constant_p (arg2.value) | |
3726 | && char_type_p (type2) | |
3727 | && warning_at (location, OPT_Wpointer_compare, | |
3728 | "comparison between pointer and zero character " | |
3729 | "constant")) | |
3730 | inform (arg1.get_start (), "did you mean to dereference the pointer?"); | |
3731 | else if (POINTER_TYPE_P (type2) | |
3732 | && null_pointer_constant_p (arg1.value) | |
3733 | && char_type_p (type1) | |
3734 | && warning_at (location, OPT_Wpointer_compare, | |
3735 | "comparison between pointer and zero character " | |
3736 | "constant")) | |
3737 | inform (arg2.get_start (), "did you mean to dereference the pointer?"); | |
e994a705 RS |
3738 | } |
3739 | else if (TREE_CODE_CLASS (code) == tcc_comparison | |
3740 | && (code1 == STRING_CST || code2 == STRING_CST)) | |
c2255bc4 AH |
3741 | warning_at (location, OPT_Waddress, |
3742 | "comparison with string literal results in unspecified behavior"); | |
e994a705 | 3743 | |
b8698a0f L |
3744 | if (TREE_OVERFLOW_P (result.value) |
3745 | && !TREE_OVERFLOW_P (arg1.value) | |
59c0753d | 3746 | && !TREE_OVERFLOW_P (arg2.value)) |
c2255bc4 | 3747 | overflow_warning (location, result.value); |
400fbf9f | 3748 | |
6866c6e8 ILT |
3749 | /* Warn about comparisons of different enum types. */ |
3750 | if (warn_enum_compare | |
3751 | && TREE_CODE_CLASS (code) == tcc_comparison | |
3752 | && TREE_CODE (type1) == ENUMERAL_TYPE | |
3753 | && TREE_CODE (type2) == ENUMERAL_TYPE | |
3754 | && TYPE_MAIN_VARIANT (type1) != TYPE_MAIN_VARIANT (type2)) | |
3755 | warning_at (location, OPT_Wenum_compare, | |
3756 | "comparison between %qT and %qT", | |
3757 | type1, type2); | |
3758 | ||
400fbf9f JW |
3759 | return result; |
3760 | } | |
3e4093b6 | 3761 | \f |
3e4093b6 | 3762 | /* Return a tree for the difference of pointers OP0 and OP1. |
1af4ebf5 | 3763 | The resulting tree has type ptrdiff_t. */ |
293c9fdd | 3764 | |
3e4093b6 | 3765 | static tree |
db3927fb | 3766 | pointer_diff (location_t loc, tree op0, tree op1) |
3e4093b6 | 3767 | { |
3e4093b6 | 3768 | tree restype = ptrdiff_type_node; |
36c5e70a | 3769 | tree result, inttype; |
400fbf9f | 3770 | |
36c5e70a BE |
3771 | addr_space_t as0 = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (op0))); |
3772 | addr_space_t as1 = TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (op1))); | |
3e4093b6 | 3773 | tree target_type = TREE_TYPE (TREE_TYPE (op0)); |
3e4093b6 | 3774 | tree orig_op1 = op1; |
400fbf9f | 3775 | |
36c5e70a BE |
3776 | /* If the operands point into different address spaces, we need to |
3777 | explicitly convert them to pointers into the common address space | |
3778 | before we can subtract the numerical address values. */ | |
3779 | if (as0 != as1) | |
3780 | { | |
3781 | addr_space_t as_common; | |
3782 | tree common_type; | |
3783 | ||
3784 | /* Determine the common superset address space. This is guaranteed | |
3785 | to exist because the caller verified that comp_target_types | |
3786 | returned non-zero. */ | |
3787 | if (!addr_space_superset (as0, as1, &as_common)) | |
3788 | gcc_unreachable (); | |
3789 | ||
3790 | common_type = common_pointer_type (TREE_TYPE (op0), TREE_TYPE (op1)); | |
3791 | op0 = convert (common_type, op0); | |
3792 | op1 = convert (common_type, op1); | |
3793 | } | |
3794 | ||
1af4ebf5 | 3795 | /* Determine integer type result of the subtraction. This will usually |
36c5e70a BE |
3796 | be the same as the result type (ptrdiff_t), but may need to be a wider |
3797 | type if pointers for the address space are wider than ptrdiff_t. */ | |
3798 | if (TYPE_PRECISION (restype) < TYPE_PRECISION (TREE_TYPE (op0))) | |
647d4b75 | 3799 | inttype = c_common_type_for_size (TYPE_PRECISION (TREE_TYPE (op0)), 0); |
36c5e70a BE |
3800 | else |
3801 | inttype = restype; | |
3802 | ||
fcf73884 | 3803 | if (TREE_CODE (target_type) == VOID_TYPE) |
44d90fe1 | 3804 | pedwarn (loc, OPT_Wpointer_arith, |
fcf73884 MLI |
3805 | "pointer of type %<void *%> used in subtraction"); |
3806 | if (TREE_CODE (target_type) == FUNCTION_TYPE) | |
44d90fe1 | 3807 | pedwarn (loc, OPT_Wpointer_arith, |
fcf73884 | 3808 | "pointer to a function used in subtraction"); |
400fbf9f | 3809 | |
1af4ebf5 MG |
3810 | /* First do the subtraction, then build the divide operator |
3811 | and only convert at the very end. | |
3812 | Do not do default conversions in case restype is a short type. */ | |
3813 | ||
3814 | /* POINTER_DIFF_EXPR requires a signed integer type of the same size as | |
3815 | pointers. If some platform cannot provide that, or has a larger | |
3816 | ptrdiff_type to support differences larger than half the address | |
3817 | space, cast the pointers to some larger integer type and do the | |
3818 | computations in that type. */ | |
3819 | if (TYPE_PRECISION (inttype) > TYPE_PRECISION (TREE_TYPE (op0))) | |
3820 | op0 = build_binary_op (loc, MINUS_EXPR, convert (inttype, op0), | |
3821 | convert (inttype, op1), false); | |
3822 | else | |
3823 | op0 = build2_loc (loc, POINTER_DIFF_EXPR, inttype, op0, op1); | |
400fbf9f | 3824 | |
3e4093b6 RS |
3825 | /* This generates an error if op1 is pointer to incomplete type. */ |
3826 | if (!COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (TREE_TYPE (orig_op1)))) | |
db3927fb | 3827 | error_at (loc, "arithmetic on pointer to an incomplete type"); |
400fbf9f | 3828 | |
3e4093b6 | 3829 | op1 = c_size_in_bytes (target_type); |
400fbf9f | 3830 | |
f04dda30 MP |
3831 | if (pointer_to_zero_sized_aggr_p (TREE_TYPE (orig_op1))) |
3832 | error_at (loc, "arithmetic on pointer to an empty aggregate"); | |
3833 | ||
3e4093b6 | 3834 | /* Divide by the size, in easiest possible way. */ |
36c5e70a BE |
3835 | result = fold_build2_loc (loc, EXACT_DIV_EXPR, inttype, |
3836 | op0, convert (inttype, op1)); | |
3837 | ||
3838 | /* Convert to final result type if necessary. */ | |
3839 | return convert (restype, result); | |
3e4093b6 RS |
3840 | } |
3841 | \f | |
2fe0a208 MP |
3842 | /* Expand atomic compound assignments into an appropriate sequence as |
3843 | specified by the C11 standard section 6.5.16.2. | |
3844 | ||
267bac10 JM |
3845 | _Atomic T1 E1 |
3846 | T2 E2 | |
3847 | E1 op= E2 | |
3848 | ||
3849 | This sequence is used for all types for which these operations are | |
3850 | supported. | |
3851 | ||
3852 | In addition, built-in versions of the 'fe' prefixed routines may | |
3853 | need to be invoked for floating point (real, complex or vector) when | |
3854 | floating-point exceptions are supported. See 6.5.16.2 footnote 113. | |
3855 | ||
3856 | T1 newval; | |
3857 | T1 old; | |
3858 | T1 *addr | |
3859 | T2 val | |
3860 | fenv_t fenv | |
3861 | ||
3862 | addr = &E1; | |
3863 | val = (E2); | |
3864 | __atomic_load (addr, &old, SEQ_CST); | |
3865 | feholdexcept (&fenv); | |
3866 | loop: | |
3867 | newval = old op val; | |
3868 | if (__atomic_compare_exchange_strong (addr, &old, &newval, SEQ_CST, | |
3869 | SEQ_CST)) | |
3870 | goto done; | |
3871 | feclearexcept (FE_ALL_EXCEPT); | |
3872 | goto loop: | |
3873 | done: | |
3874 | feupdateenv (&fenv); | |
3875 | ||
2fe0a208 MP |
3876 | The compiler will issue the __atomic_fetch_* built-in when possible, |
3877 | otherwise it will generate the generic form of the atomic operations. | |
3878 | This requires temp(s) and has their address taken. The atomic processing | |
3879 | is smart enough to figure out when the size of an object can utilize | |
3880 | a lock-free version, and convert the built-in call to the appropriate | |
3881 | lock-free routine. The optimizers will then dispose of any temps that | |
3882 | are no longer required, and lock-free implementations are utilized as | |
3883 | long as there is target support for the required size. | |
267bac10 JM |
3884 | |
3885 | If the operator is NOP_EXPR, then this is a simple assignment, and | |
3886 | an __atomic_store is issued to perform the assignment rather than | |
2fe0a208 | 3887 | the above loop. */ |
267bac10 JM |
3888 | |
3889 | /* Build an atomic assignment at LOC, expanding into the proper | |
3890 | sequence to store LHS MODIFYCODE= RHS. Return a value representing | |
2fe0a208 | 3891 | the result of the operation, unless RETURN_OLD_P, in which case |
267bac10 JM |
3892 | return the old value of LHS (this is only for postincrement and |
3893 | postdecrement). */ | |
2fe0a208 | 3894 | |
267bac10 JM |
3895 | static tree |
3896 | build_atomic_assign (location_t loc, tree lhs, enum tree_code modifycode, | |
3897 | tree rhs, bool return_old_p) | |
3898 | { | |
3899 | tree fndecl, func_call; | |
3900 | vec<tree, va_gc> *params; | |
3901 | tree val, nonatomic_lhs_type, nonatomic_rhs_type, newval, newval_addr; | |
3902 | tree old, old_addr; | |
3903 | tree compound_stmt; | |
3904 | tree stmt, goto_stmt; | |
3905 | tree loop_label, loop_decl, done_label, done_decl; | |
3906 | ||
3907 | tree lhs_type = TREE_TYPE (lhs); | |
e51fbec3 | 3908 | tree lhs_addr = build_unary_op (loc, ADDR_EXPR, lhs, false); |
267bac10 | 3909 | tree seq_cst = build_int_cst (integer_type_node, MEMMODEL_SEQ_CST); |
e035be33 JM |
3910 | tree rhs_semantic_type = TREE_TYPE (rhs); |
3911 | tree nonatomic_rhs_semantic_type; | |
3912 | tree rhs_type; | |
267bac10 JM |
3913 | |
3914 | gcc_assert (TYPE_ATOMIC (lhs_type)); | |
3915 | ||
3916 | if (return_old_p) | |
3917 | gcc_assert (modifycode == PLUS_EXPR || modifycode == MINUS_EXPR); | |
3918 | ||
3919 | /* Allocate enough vector items for a compare_exchange. */ | |
3920 | vec_alloc (params, 6); | |
3921 | ||
3922 | /* Create a compound statement to hold the sequence of statements | |
3923 | with a loop. */ | |
3924 | compound_stmt = c_begin_compound_stmt (false); | |
3925 | ||
e035be33 JM |
3926 | /* Remove any excess precision (which is only present here in the |
3927 | case of compound assignments). */ | |
3928 | if (TREE_CODE (rhs) == EXCESS_PRECISION_EXPR) | |
3929 | { | |
3930 | gcc_assert (modifycode != NOP_EXPR); | |
3931 | rhs = TREE_OPERAND (rhs, 0); | |
3932 | } | |
3933 | rhs_type = TREE_TYPE (rhs); | |
3934 | ||
267bac10 JM |
3935 | /* Fold the RHS if it hasn't already been folded. */ |
3936 | if (modifycode != NOP_EXPR) | |
3937 | rhs = c_fully_fold (rhs, false, NULL); | |
3938 | ||
3939 | /* Remove the qualifiers for the rest of the expressions and create | |
3940 | the VAL temp variable to hold the RHS. */ | |
3941 | nonatomic_lhs_type = build_qualified_type (lhs_type, TYPE_UNQUALIFIED); | |
3942 | nonatomic_rhs_type = build_qualified_type (rhs_type, TYPE_UNQUALIFIED); | |
e035be33 JM |
3943 | nonatomic_rhs_semantic_type = build_qualified_type (rhs_semantic_type, |
3944 | TYPE_UNQUALIFIED); | |
5c4abbb8 | 3945 | val = create_tmp_var_raw (nonatomic_rhs_type); |
267bac10 | 3946 | TREE_ADDRESSABLE (val) = 1; |
cc28fc7f | 3947 | TREE_NO_WARNING (val) = 1; |
5c4abbb8 MP |
3948 | rhs = build4 (TARGET_EXPR, nonatomic_rhs_type, val, rhs, NULL_TREE, |
3949 | NULL_TREE); | |
267bac10 JM |
3950 | SET_EXPR_LOCATION (rhs, loc); |
3951 | add_stmt (rhs); | |
3952 | ||
3953 | /* NOP_EXPR indicates it's a straight store of the RHS. Simply issue | |
3954 | an atomic_store. */ | |
3955 | if (modifycode == NOP_EXPR) | |
3956 | { | |
3957 | /* Build __atomic_store (&lhs, &val, SEQ_CST) */ | |
e51fbec3 | 3958 | rhs = build_unary_op (loc, ADDR_EXPR, val, false); |
267bac10 JM |
3959 | fndecl = builtin_decl_explicit (BUILT_IN_ATOMIC_STORE); |
3960 | params->quick_push (lhs_addr); | |
3961 | params->quick_push (rhs); | |
3962 | params->quick_push (seq_cst); | |
8edbfaa6 | 3963 | func_call = c_build_function_call_vec (loc, vNULL, fndecl, params, NULL); |
267bac10 JM |
3964 | add_stmt (func_call); |
3965 | ||
3966 | /* Finish the compound statement. */ | |
3967 | compound_stmt = c_end_compound_stmt (loc, compound_stmt, false); | |
3968 | ||
3969 | /* VAL is the value which was stored, return a COMPOUND_STMT of | |
3970 | the statement and that value. */ | |
3971 | return build2 (COMPOUND_EXPR, nonatomic_lhs_type, compound_stmt, val); | |
3972 | } | |
3973 | ||
2fe0a208 MP |
3974 | /* Attempt to implement the atomic operation as an __atomic_fetch_* or |
3975 | __atomic_*_fetch built-in rather than a CAS loop. atomic_bool type | |
3976 | isn't applicable for such builtins. ??? Do we want to handle enums? */ | |
3977 | if ((TREE_CODE (lhs_type) == INTEGER_TYPE || POINTER_TYPE_P (lhs_type)) | |
3978 | && TREE_CODE (rhs_type) == INTEGER_TYPE) | |
3979 | { | |
3980 | built_in_function fncode; | |
3981 | switch (modifycode) | |
3982 | { | |
3983 | case PLUS_EXPR: | |
3984 | case POINTER_PLUS_EXPR: | |
3985 | fncode = (return_old_p | |
3986 | ? BUILT_IN_ATOMIC_FETCH_ADD_N | |
3987 | : BUILT_IN_ATOMIC_ADD_FETCH_N); | |
3988 | break; | |
3989 | case MINUS_EXPR: | |
3990 | fncode = (return_old_p | |
3991 | ? BUILT_IN_ATOMIC_FETCH_SUB_N | |
3992 | : BUILT_IN_ATOMIC_SUB_FETCH_N); | |
3993 | break; | |
3994 | case BIT_AND_EXPR: | |
3995 | fncode = (return_old_p | |
3996 | ? BUILT_IN_ATOMIC_FETCH_AND_N | |
3997 | : BUILT_IN_ATOMIC_AND_FETCH_N); | |
3998 | break; | |
3999 | case BIT_IOR_EXPR: | |
4000 | fncode = (return_old_p | |
4001 | ? BUILT_IN_ATOMIC_FETCH_OR_N | |
4002 | : BUILT_IN_ATOMIC_OR_FETCH_N); | |
4003 | break; | |
4004 | case BIT_XOR_EXPR: | |
4005 | fncode = (return_old_p | |
4006 | ? BUILT_IN_ATOMIC_FETCH_XOR_N | |
4007 | : BUILT_IN_ATOMIC_XOR_FETCH_N); | |
4008 | break; | |
4009 | default: | |
4010 | goto cas_loop; | |
4011 | } | |
4012 | ||
4013 | /* We can only use "_1" through "_16" variants of the atomic fetch | |
4014 | built-ins. */ | |
4015 | unsigned HOST_WIDE_INT size = tree_to_uhwi (TYPE_SIZE_UNIT (lhs_type)); | |
4016 | if (size != 1 && size != 2 && size != 4 && size != 8 && size != 16) | |
4017 | goto cas_loop; | |
4018 | ||
4019 | /* If this is a pointer type, we need to multiply by the size of | |
4020 | the pointer target type. */ | |
4021 | if (POINTER_TYPE_P (lhs_type)) | |
4022 | { | |
4023 | if (!COMPLETE_TYPE_P (TREE_TYPE (lhs_type)) | |
4024 | /* ??? This would introduce -Wdiscarded-qualifiers | |
4025 | warning: __atomic_fetch_* expect volatile void * | |
4026 | type as the first argument. (Assignments between | |
4027 | atomic and non-atomic objects are OK.) */ | |
4028 | || TYPE_RESTRICT (lhs_type)) | |
4029 | goto cas_loop; | |
4030 | tree sz = TYPE_SIZE_UNIT (TREE_TYPE (lhs_type)); | |
4031 | rhs = fold_build2_loc (loc, MULT_EXPR, ptrdiff_type_node, | |
4032 | convert (ptrdiff_type_node, rhs), | |
4033 | convert (ptrdiff_type_node, sz)); | |
4034 | } | |
4035 | ||
4036 | /* Build __atomic_fetch_* (&lhs, &val, SEQ_CST), or | |
4037 | __atomic_*_fetch (&lhs, &val, SEQ_CST). */ | |
4038 | fndecl = builtin_decl_explicit (fncode); | |
4039 | params->quick_push (lhs_addr); | |
4040 | params->quick_push (rhs); | |
4041 | params->quick_push (seq_cst); | |
4042 | func_call = c_build_function_call_vec (loc, vNULL, fndecl, params, NULL); | |
4043 | ||
4044 | newval = create_tmp_var_raw (nonatomic_lhs_type); | |
4045 | TREE_ADDRESSABLE (newval) = 1; | |
4046 | TREE_NO_WARNING (newval) = 1; | |
4047 | rhs = build4 (TARGET_EXPR, nonatomic_lhs_type, newval, func_call, | |
4048 | NULL_TREE, NULL_TREE); | |
4049 | SET_EXPR_LOCATION (rhs, loc); | |
4050 | add_stmt (rhs); | |
4051 | ||
4052 | /* Finish the compound statement. */ | |
4053 | compound_stmt = c_end_compound_stmt (loc, compound_stmt, false); | |
4054 | ||
4055 | /* NEWVAL is the value which was stored, return a COMPOUND_STMT of | |
4056 | the statement and that value. */ | |
4057 | return build2 (COMPOUND_EXPR, nonatomic_lhs_type, compound_stmt, newval); | |
4058 | } | |
4059 | ||
4060 | cas_loop: | |
267bac10 | 4061 | /* Create the variables and labels required for the op= form. */ |
5c4abbb8 | 4062 | old = create_tmp_var_raw (nonatomic_lhs_type); |
e51fbec3 | 4063 | old_addr = build_unary_op (loc, ADDR_EXPR, old, false); |
cc28fc7f MP |
4064 | TREE_ADDRESSABLE (old) = 1; |
4065 | TREE_NO_WARNING (old) = 1; | |
267bac10 | 4066 | |
5c4abbb8 | 4067 | newval = create_tmp_var_raw (nonatomic_lhs_type); |
e51fbec3 | 4068 | newval_addr = build_unary_op (loc, ADDR_EXPR, newval, false); |
267bac10 | 4069 | TREE_ADDRESSABLE (newval) = 1; |
2994fb91 | 4070 | TREE_NO_WARNING (newval) = 1; |
267bac10 JM |
4071 | |
4072 | loop_decl = create_artificial_label (loc); | |
4073 | loop_label = build1 (LABEL_EXPR, void_type_node, loop_decl); | |
4074 | ||
4075 | done_decl = create_artificial_label (loc); | |
4076 | done_label = build1 (LABEL_EXPR, void_type_node, done_decl); | |
4077 | ||
4078 | /* __atomic_load (addr, &old, SEQ_CST). */ | |
4079 | fndecl = builtin_decl_explicit (BUILT_IN_ATOMIC_LOAD); | |
4080 | params->quick_push (lhs_addr); | |
4081 | params->quick_push (old_addr); | |
4082 | params->quick_push (seq_cst); | |
8edbfaa6 | 4083 | func_call = c_build_function_call_vec (loc, vNULL, fndecl, params, NULL); |
5c4abbb8 MP |
4084 | old = build4 (TARGET_EXPR, nonatomic_lhs_type, old, func_call, NULL_TREE, |
4085 | NULL_TREE); | |
4086 | add_stmt (old); | |
267bac10 JM |
4087 | params->truncate (0); |
4088 | ||
4089 | /* Create the expressions for floating-point environment | |
4090 | manipulation, if required. */ | |
4091 | bool need_fenv = (flag_trapping_math | |
4092 | && (FLOAT_TYPE_P (lhs_type) || FLOAT_TYPE_P (rhs_type))); | |
4093 | tree hold_call = NULL_TREE, clear_call = NULL_TREE, update_call = NULL_TREE; | |
4094 | if (need_fenv) | |
4095 | targetm.atomic_assign_expand_fenv (&hold_call, &clear_call, &update_call); | |
4096 | ||
4097 | if (hold_call) | |
4098 | add_stmt (hold_call); | |
4099 | ||
4100 | /* loop: */ | |
4101 | add_stmt (loop_label); | |
4102 | ||
4103 | /* newval = old + val; */ | |
e035be33 JM |
4104 | if (rhs_type != rhs_semantic_type) |
4105 | val = build1 (EXCESS_PRECISION_EXPR, nonatomic_rhs_semantic_type, val); | |
30af3a2b | 4106 | rhs = build_binary_op (loc, modifycode, old, val, true); |
e035be33 JM |
4107 | if (TREE_CODE (rhs) == EXCESS_PRECISION_EXPR) |
4108 | { | |
4109 | tree eptype = TREE_TYPE (rhs); | |
4110 | rhs = c_fully_fold (TREE_OPERAND (rhs, 0), false, NULL); | |
4111 | rhs = build1 (EXCESS_PRECISION_EXPR, eptype, rhs); | |
4112 | } | |
4113 | else | |
4114 | rhs = c_fully_fold (rhs, false, NULL); | |
68fca595 MP |
4115 | rhs = convert_for_assignment (loc, UNKNOWN_LOCATION, nonatomic_lhs_type, |
4116 | rhs, NULL_TREE, ic_assign, false, NULL_TREE, | |
267bac10 JM |
4117 | NULL_TREE, 0); |
4118 | if (rhs != error_mark_node) | |
4119 | { | |
5c4abbb8 MP |
4120 | rhs = build4 (TARGET_EXPR, nonatomic_lhs_type, newval, rhs, NULL_TREE, |
4121 | NULL_TREE); | |
267bac10 JM |
4122 | SET_EXPR_LOCATION (rhs, loc); |
4123 | add_stmt (rhs); | |
4124 | } | |
4125 | ||
4126 | /* if (__atomic_compare_exchange (addr, &old, &new, false, SEQ_CST, SEQ_CST)) | |
4127 | goto done; */ | |
4128 | fndecl = builtin_decl_explicit (BUILT_IN_ATOMIC_COMPARE_EXCHANGE); | |
4129 | params->quick_push (lhs_addr); | |
4130 | params->quick_push (old_addr); | |
4131 | params->quick_push (newval_addr); | |
4132 | params->quick_push (integer_zero_node); | |
4133 | params->quick_push (seq_cst); | |
4134 | params->quick_push (seq_cst); | |
8edbfaa6 | 4135 | func_call = c_build_function_call_vec (loc, vNULL, fndecl, params, NULL); |
267bac10 JM |
4136 | |
4137 | goto_stmt = build1 (GOTO_EXPR, void_type_node, done_decl); | |
4138 | SET_EXPR_LOCATION (goto_stmt, loc); | |
4139 | ||
4140 | stmt = build3 (COND_EXPR, void_type_node, func_call, goto_stmt, NULL_TREE); | |
4141 | SET_EXPR_LOCATION (stmt, loc); | |
4142 | add_stmt (stmt); | |
5c4abbb8 | 4143 | |
267bac10 JM |
4144 | if (clear_call) |
4145 | add_stmt (clear_call); | |
4146 | ||
4147 | /* goto loop; */ | |
4148 | goto_stmt = build1 (GOTO_EXPR, void_type_node, loop_decl); | |
4149 | SET_EXPR_LOCATION (goto_stmt, loc); | |
4150 | add_stmt (goto_stmt); | |
5c4abbb8 | 4151 | |
267bac10 JM |
4152 | /* done: */ |
4153 | add_stmt (done_label); | |
4154 | ||
4155 | if (update_call) | |
4156 | add_stmt (update_call); | |
4157 | ||
4158 | /* Finish the compound statement. */ | |
4159 | compound_stmt = c_end_compound_stmt (loc, compound_stmt, false); | |
4160 | ||
4161 | /* NEWVAL is the value that was successfully stored, return a | |
4162 | COMPOUND_EXPR of the statement and the appropriate value. */ | |
4163 | return build2 (COMPOUND_EXPR, nonatomic_lhs_type, compound_stmt, | |
4164 | return_old_p ? old : newval); | |
4165 | } | |
4166 | ||
3e4093b6 RS |
4167 | /* Construct and perhaps optimize a tree representation |
4168 | for a unary operation. CODE, a tree_code, specifies the operation | |
4169 | and XARG is the operand. | |
e51fbec3 MP |
4170 | For any CODE other than ADDR_EXPR, NOCONVERT suppresses the default |
4171 | promotions (such as from short to int). | |
4172 | For ADDR_EXPR, the default promotions are not applied; NOCONVERT allows | |
4173 | non-lvalues; this is only used to handle conversion of non-lvalue arrays | |
4174 | to pointers in C99. | |
c9f9eb5d AH |
4175 | |
4176 | LOCATION is the location of the operator. */ | |
400fbf9f | 4177 | |
3e4093b6 | 4178 | tree |
4c13ba17 | 4179 | build_unary_op (location_t location, enum tree_code code, tree xarg, |
e51fbec3 | 4180 | bool noconvert) |
3e4093b6 RS |
4181 | { |
4182 | /* No default_conversion here. It causes trouble for ADDR_EXPR. */ | |
4183 | tree arg = xarg; | |
3fa8871b | 4184 | tree argtype = NULL_TREE; |
808d6eaa | 4185 | enum tree_code typecode; |
3e4093b6 | 4186 | tree val; |
c9f9eb5d | 4187 | tree ret = error_mark_node; |
8ce94e44 | 4188 | tree eptype = NULL_TREE; |
4de67c26 | 4189 | const char *invalid_op_diag; |
928c19bb JM |
4190 | bool int_operands; |
4191 | ||
4192 | int_operands = EXPR_INT_CONST_OPERANDS (xarg); | |
4d84fe7c JM |
4193 | if (int_operands) |
4194 | arg = remove_c_maybe_const_expr (arg); | |
400fbf9f | 4195 | |
808d6eaa | 4196 | if (code != ADDR_EXPR) |
4f2e1536 | 4197 | arg = require_complete_type (location, arg); |
808d6eaa JM |
4198 | |
4199 | typecode = TREE_CODE (TREE_TYPE (arg)); | |
3e4093b6 RS |
4200 | if (typecode == ERROR_MARK) |
4201 | return error_mark_node; | |
4202 | if (typecode == ENUMERAL_TYPE || typecode == BOOLEAN_TYPE) | |
4203 | typecode = INTEGER_TYPE; | |
6c36d76b | 4204 | |
4de67c26 JM |
4205 | if ((invalid_op_diag |
4206 | = targetm.invalid_unary_op (code, TREE_TYPE (xarg)))) | |
4207 | { | |
c9f9eb5d | 4208 | error_at (location, invalid_op_diag); |
4de67c26 JM |
4209 | return error_mark_node; |
4210 | } | |
4211 | ||
8ce94e44 JM |
4212 | if (TREE_CODE (arg) == EXCESS_PRECISION_EXPR) |
4213 | { | |
4214 | eptype = TREE_TYPE (arg); | |
4215 | arg = TREE_OPERAND (arg, 0); | |
4216 | } | |
4217 | ||
3e4093b6 RS |
4218 | switch (code) |
4219 | { | |
4220 | case CONVERT_EXPR: | |
4221 | /* This is used for unary plus, because a CONVERT_EXPR | |
4222 | is enough to prevent anybody from looking inside for | |
4223 | associativity, but won't generate any code. */ | |
4224 | if (!(typecode == INTEGER_TYPE || typecode == REAL_TYPE | |
ab22c1fa | 4225 | || typecode == FIXED_POINT_TYPE || typecode == COMPLEX_TYPE |
8a2cee38 | 4226 | || typecode == VECTOR_TYPE)) |
400fbf9f | 4227 | { |
c9f9eb5d | 4228 | error_at (location, "wrong type argument to unary plus"); |
3e4093b6 | 4229 | return error_mark_node; |
400fbf9f | 4230 | } |
3e4093b6 RS |
4231 | else if (!noconvert) |
4232 | arg = default_conversion (arg); | |
db3927fb | 4233 | arg = non_lvalue_loc (location, arg); |
400fbf9f JW |
4234 | break; |
4235 | ||
3e4093b6 RS |
4236 | case NEGATE_EXPR: |
4237 | if (!(typecode == INTEGER_TYPE || typecode == REAL_TYPE | |
ab22c1fa | 4238 | || typecode == FIXED_POINT_TYPE || typecode == COMPLEX_TYPE |
3e4093b6 RS |
4239 | || typecode == VECTOR_TYPE)) |
4240 | { | |
c9f9eb5d | 4241 | error_at (location, "wrong type argument to unary minus"); |
3e4093b6 RS |
4242 | return error_mark_node; |
4243 | } | |
4244 | else if (!noconvert) | |
4245 | arg = default_conversion (arg); | |
400fbf9f JW |
4246 | break; |
4247 | ||
3e4093b6 | 4248 | case BIT_NOT_EXPR: |
462643f0 AP |
4249 | /* ~ works on integer types and non float vectors. */ |
4250 | if (typecode == INTEGER_TYPE | |
4251 | || (typecode == VECTOR_TYPE | |
4252 | && !VECTOR_FLOAT_TYPE_P (TREE_TYPE (arg)))) | |
03d5b1f5 | 4253 | { |
9a2300e9 MP |
4254 | tree e = arg; |
4255 | ||
4256 | /* Warn if the expression has boolean value. */ | |
4257 | while (TREE_CODE (e) == COMPOUND_EXPR) | |
4258 | e = TREE_OPERAND (e, 1); | |
4259 | ||
4260 | if ((TREE_CODE (TREE_TYPE (arg)) == BOOLEAN_TYPE | |
4261 | || truth_value_p (TREE_CODE (e))) | |
4262 | && warning_at (location, OPT_Wbool_operation, | |
4263 | "%<~%> on a boolean expression")) | |
4264 | { | |
4265 | gcc_rich_location richloc (location); | |
4266 | richloc.add_fixit_insert_before (location, "!"); | |
64a5912c | 4267 | inform (&richloc, "did you mean to use logical not?"); |
9a2300e9 | 4268 | } |
3e4093b6 RS |
4269 | if (!noconvert) |
4270 | arg = default_conversion (arg); | |
03d5b1f5 | 4271 | } |
3e4093b6 | 4272 | else if (typecode == COMPLEX_TYPE) |
400fbf9f | 4273 | { |
3e4093b6 | 4274 | code = CONJ_EXPR; |
c1771a20 | 4275 | pedwarn (location, OPT_Wpedantic, |
fcf73884 | 4276 | "ISO C does not support %<~%> for complex conjugation"); |
3e4093b6 RS |
4277 | if (!noconvert) |
4278 | arg = default_conversion (arg); | |
4279 | } | |
4280 | else | |
4281 | { | |
c9f9eb5d | 4282 | error_at (location, "wrong type argument to bit-complement"); |
3e4093b6 | 4283 | return error_mark_node; |
400fbf9f JW |
4284 | } |
4285 | break; | |
4286 | ||
3e4093b6 | 4287 | case ABS_EXPR: |
11017cc7 | 4288 | if (!(typecode == INTEGER_TYPE || typecode == REAL_TYPE)) |
400fbf9f | 4289 | { |
c9f9eb5d | 4290 | error_at (location, "wrong type argument to abs"); |
3e4093b6 | 4291 | return error_mark_node; |
400fbf9f | 4292 | } |
3e4093b6 RS |
4293 | else if (!noconvert) |
4294 | arg = default_conversion (arg); | |
400fbf9f JW |
4295 | break; |
4296 | ||
3e4093b6 RS |
4297 | case CONJ_EXPR: |
4298 | /* Conjugating a real value is a no-op, but allow it anyway. */ | |
4299 | if (!(typecode == INTEGER_TYPE || typecode == REAL_TYPE | |
4300 | || typecode == COMPLEX_TYPE)) | |
400fbf9f | 4301 | { |
c9f9eb5d | 4302 | error_at (location, "wrong type argument to conjugation"); |
3e4093b6 | 4303 | return error_mark_node; |
400fbf9f | 4304 | } |
3e4093b6 RS |
4305 | else if (!noconvert) |
4306 | arg = default_conversion (arg); | |
400fbf9f JW |
4307 | break; |
4308 | ||
3e4093b6 | 4309 | case TRUTH_NOT_EXPR: |
ab22c1fa | 4310 | if (typecode != INTEGER_TYPE && typecode != FIXED_POINT_TYPE |
3e4093b6 | 4311 | && typecode != REAL_TYPE && typecode != POINTER_TYPE |
46bdb9cf | 4312 | && typecode != COMPLEX_TYPE) |
400fbf9f | 4313 | { |
c9f9eb5d AH |
4314 | error_at (location, |
4315 | "wrong type argument to unary exclamation mark"); | |
3e4093b6 | 4316 | return error_mark_node; |
400fbf9f | 4317 | } |
a27d595d JM |
4318 | if (int_operands) |
4319 | { | |
4320 | arg = c_objc_common_truthvalue_conversion (location, xarg); | |
4321 | arg = remove_c_maybe_const_expr (arg); | |
4322 | } | |
4323 | else | |
4324 | arg = c_objc_common_truthvalue_conversion (location, arg); | |
db3927fb | 4325 | ret = invert_truthvalue_loc (location, arg); |
ca80e52b EB |
4326 | /* If the TRUTH_NOT_EXPR has been folded, reset the location. */ |
4327 | if (EXPR_P (ret) && EXPR_HAS_LOCATION (ret)) | |
4328 | location = EXPR_LOCATION (ret); | |
c9f9eb5d | 4329 | goto return_build_unary_op; |
3e4093b6 | 4330 | |
3e4093b6 | 4331 | case REALPART_EXPR: |
3e4093b6 | 4332 | case IMAGPART_EXPR: |
fb52b50a NF |
4333 | ret = build_real_imag_expr (location, code, arg); |
4334 | if (ret == error_mark_node) | |
4335 | return error_mark_node; | |
8ce94e44 JM |
4336 | if (eptype && TREE_CODE (eptype) == COMPLEX_TYPE) |
4337 | eptype = TREE_TYPE (eptype); | |
c9f9eb5d | 4338 | goto return_build_unary_op; |
3e4093b6 RS |
4339 | |
4340 | case PREINCREMENT_EXPR: | |
4341 | case POSTINCREMENT_EXPR: | |
4342 | case PREDECREMENT_EXPR: | |
4343 | case POSTDECREMENT_EXPR: | |
3e4093b6 | 4344 | |
928c19bb JM |
4345 | if (TREE_CODE (arg) == C_MAYBE_CONST_EXPR) |
4346 | { | |
4347 | tree inner = build_unary_op (location, code, | |
4c13ba17 MP |
4348 | C_MAYBE_CONST_EXPR_EXPR (arg), |
4349 | noconvert); | |
928c19bb JM |
4350 | if (inner == error_mark_node) |
4351 | return error_mark_node; | |
4352 | ret = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (inner), | |
4353 | C_MAYBE_CONST_EXPR_PRE (arg), inner); | |
4354 | gcc_assert (!C_MAYBE_CONST_EXPR_INT_OPERANDS (arg)); | |
4355 | C_MAYBE_CONST_EXPR_NON_CONST (ret) = 1; | |
4356 | goto return_build_unary_op; | |
4357 | } | |
4358 | ||
925e8657 NP |
4359 | /* Complain about anything that is not a true lvalue. In |
4360 | Objective-C, skip this check for property_refs. */ | |
f90e8e2e | 4361 | if (!objc_is_property_ref (arg) |
7bd11157 TT |
4362 | && !lvalue_or_else (location, |
4363 | arg, ((code == PREINCREMENT_EXPR | |
925e8657 NP |
4364 | || code == POSTINCREMENT_EXPR) |
4365 | ? lv_increment | |
4366 | : lv_decrement))) | |
928c19bb JM |
4367 | return error_mark_node; |
4368 | ||
09639a83 ILT |
4369 | if (warn_cxx_compat && TREE_CODE (TREE_TYPE (arg)) == ENUMERAL_TYPE) |
4370 | { | |
4371 | if (code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR) | |
4372 | warning_at (location, OPT_Wc___compat, | |
4373 | "increment of enumeration value is invalid in C++"); | |
4374 | else | |
4375 | warning_at (location, OPT_Wc___compat, | |
4376 | "decrement of enumeration value is invalid in C++"); | |
4377 | } | |
4378 | ||
9a2300e9 MP |
4379 | if (TREE_CODE (TREE_TYPE (arg)) == BOOLEAN_TYPE) |
4380 | { | |
4381 | if (code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR) | |
4382 | warning_at (location, OPT_Wbool_operation, | |
4383 | "increment of a boolean expression"); | |
4384 | else | |
4385 | warning_at (location, OPT_Wbool_operation, | |
4386 | "decrement of a boolean expression"); | |
4387 | } | |
4388 | ||
928c19bb | 4389 | /* Ensure the argument is fully folded inside any SAVE_EXPR. */ |
f9c59f7e | 4390 | arg = c_fully_fold (arg, false, NULL, true); |
928c19bb | 4391 | |
267bac10 JM |
4392 | bool atomic_op; |
4393 | atomic_op = really_atomic_lvalue (arg); | |
4394 | ||
3e4093b6 RS |
4395 | /* Increment or decrement the real part of the value, |
4396 | and don't change the imaginary part. */ | |
4397 | if (typecode == COMPLEX_TYPE) | |
400fbf9f | 4398 | { |
3e4093b6 RS |
4399 | tree real, imag; |
4400 | ||
c1771a20 | 4401 | pedwarn (location, OPT_Wpedantic, |
509c9d60 | 4402 | "ISO C does not support %<++%> and %<--%> on complex types"); |
3e4093b6 | 4403 | |
267bac10 JM |
4404 | if (!atomic_op) |
4405 | { | |
4406 | arg = stabilize_reference (arg); | |
e51fbec3 MP |
4407 | real = build_unary_op (EXPR_LOCATION (arg), REALPART_EXPR, arg, |
4408 | true); | |
4409 | imag = build_unary_op (EXPR_LOCATION (arg), IMAGPART_EXPR, arg, | |
4410 | true); | |
4411 | real = build_unary_op (EXPR_LOCATION (arg), code, real, true); | |
267bac10 JM |
4412 | if (real == error_mark_node || imag == error_mark_node) |
4413 | return error_mark_node; | |
4414 | ret = build2 (COMPLEX_EXPR, TREE_TYPE (arg), | |
4415 | real, imag); | |
4416 | goto return_build_unary_op; | |
4417 | } | |
400fbf9f | 4418 | } |
3e4093b6 RS |
4419 | |
4420 | /* Report invalid types. */ | |
4421 | ||
ab22c1fa | 4422 | if (typecode != POINTER_TYPE && typecode != FIXED_POINT_TYPE |
267bac10 | 4423 | && typecode != INTEGER_TYPE && typecode != REAL_TYPE |
241b71bb | 4424 | && typecode != COMPLEX_TYPE && typecode != VECTOR_TYPE) |
400fbf9f | 4425 | { |
3e4093b6 | 4426 | if (code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR) |
c9f9eb5d | 4427 | error_at (location, "wrong type argument to increment"); |
c22cacf3 | 4428 | else |
c9f9eb5d | 4429 | error_at (location, "wrong type argument to decrement"); |
3e4093b6 RS |
4430 | |
4431 | return error_mark_node; | |
400fbf9f | 4432 | } |
400fbf9f | 4433 | |
3e4093b6 RS |
4434 | { |
4435 | tree inc; | |
400fbf9f | 4436 | |
3e4093b6 RS |
4437 | argtype = TREE_TYPE (arg); |
4438 | ||
4439 | /* Compute the increment. */ | |
4440 | ||
4441 | if (typecode == POINTER_TYPE) | |
4442 | { | |
a0e24419 | 4443 | /* If pointer target is an incomplete type, |
3e4093b6 | 4444 | we just cannot know how to do the arithmetic. */ |
b70cef5d | 4445 | if (!COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (argtype))) |
3e4093b6 RS |
4446 | { |
4447 | if (code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR) | |
c9f9eb5d | 4448 | error_at (location, |
a0e24419 MP |
4449 | "increment of pointer to an incomplete type %qT", |
4450 | TREE_TYPE (argtype)); | |
3e4093b6 | 4451 | else |
c9f9eb5d | 4452 | error_at (location, |
a0e24419 MP |
4453 | "decrement of pointer to an incomplete type %qT", |
4454 | TREE_TYPE (argtype)); | |
3e4093b6 | 4455 | } |
b70cef5d JJ |
4456 | else if (TREE_CODE (TREE_TYPE (argtype)) == FUNCTION_TYPE |
4457 | || TREE_CODE (TREE_TYPE (argtype)) == VOID_TYPE) | |
c22cacf3 | 4458 | { |
3e4093b6 | 4459 | if (code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR) |
44d90fe1 | 4460 | pedwarn (location, OPT_Wpointer_arith, |
fcf73884 | 4461 | "wrong type argument to increment"); |
3e4093b6 | 4462 | else |
44d90fe1 | 4463 | pedwarn (location, OPT_Wpointer_arith, |
fcf73884 | 4464 | "wrong type argument to decrement"); |
3e4093b6 RS |
4465 | } |
4466 | ||
b70cef5d | 4467 | inc = c_size_in_bytes (TREE_TYPE (argtype)); |
0d82a1c8 | 4468 | inc = convert_to_ptrofftype_loc (location, inc); |
3e4093b6 | 4469 | } |
b70cef5d | 4470 | else if (FRACT_MODE_P (TYPE_MODE (argtype))) |
ab22c1fa CF |
4471 | { |
4472 | /* For signed fract types, we invert ++ to -- or | |
4473 | -- to ++, and change inc from 1 to -1, because | |
4474 | it is not possible to represent 1 in signed fract constants. | |
4475 | For unsigned fract types, the result always overflows and | |
4476 | we get an undefined (original) or the maximum value. */ | |
4477 | if (code == PREINCREMENT_EXPR) | |
4478 | code = PREDECREMENT_EXPR; | |
4479 | else if (code == PREDECREMENT_EXPR) | |
4480 | code = PREINCREMENT_EXPR; | |
4481 | else if (code == POSTINCREMENT_EXPR) | |
4482 | code = POSTDECREMENT_EXPR; | |
4483 | else /* code == POSTDECREMENT_EXPR */ | |
4484 | code = POSTINCREMENT_EXPR; | |
4485 | ||
4486 | inc = integer_minus_one_node; | |
4487 | inc = convert (argtype, inc); | |
4488 | } | |
3e4093b6 | 4489 | else |
5be014d5 | 4490 | { |
241b71bb TV |
4491 | inc = VECTOR_TYPE_P (argtype) |
4492 | ? build_one_cst (argtype) | |
4493 | : integer_one_node; | |
5be014d5 AP |
4494 | inc = convert (argtype, inc); |
4495 | } | |
3e4093b6 | 4496 | |
925e8657 NP |
4497 | /* If 'arg' is an Objective-C PROPERTY_REF expression, then we |
4498 | need to ask Objective-C to build the increment or decrement | |
4499 | expression for it. */ | |
4500 | if (objc_is_property_ref (arg)) | |
f90e8e2e | 4501 | return objc_build_incr_expr_for_property_ref (location, code, |
925e8657 NP |
4502 | arg, inc); |
4503 | ||
3e4093b6 | 4504 | /* Report a read-only lvalue. */ |
f37acdf9 | 4505 | if (TYPE_READONLY (argtype)) |
953ff289 | 4506 | { |
c02065fc | 4507 | readonly_error (location, arg, |
953ff289 DN |
4508 | ((code == PREINCREMENT_EXPR |
4509 | || code == POSTINCREMENT_EXPR) | |
4510 | ? lv_increment : lv_decrement)); | |
4511 | return error_mark_node; | |
4512 | } | |
f37acdf9 JM |
4513 | else if (TREE_READONLY (arg)) |
4514 | readonly_warning (arg, | |
4515 | ((code == PREINCREMENT_EXPR | |
4516 | || code == POSTINCREMENT_EXPR) | |
4517 | ? lv_increment : lv_decrement)); | |
3e4093b6 | 4518 | |
267bac10 JM |
4519 | /* If the argument is atomic, use the special code sequences for |
4520 | atomic compound assignment. */ | |
4521 | if (atomic_op) | |
4522 | { | |
4523 | arg = stabilize_reference (arg); | |
4524 | ret = build_atomic_assign (location, arg, | |
4525 | ((code == PREINCREMENT_EXPR | |
4526 | || code == POSTINCREMENT_EXPR) | |
4527 | ? PLUS_EXPR | |
4528 | : MINUS_EXPR), | |
4529 | (FRACT_MODE_P (TYPE_MODE (argtype)) | |
4530 | ? inc | |
4531 | : integer_one_node), | |
4532 | (code == POSTINCREMENT_EXPR | |
4533 | || code == POSTDECREMENT_EXPR)); | |
4534 | goto return_build_unary_op; | |
4535 | } | |
4536 | ||
3e4093b6 RS |
4537 | if (TREE_CODE (TREE_TYPE (arg)) == BOOLEAN_TYPE) |
4538 | val = boolean_increment (code, arg); | |
4539 | else | |
53fb4de3 | 4540 | val = build2 (code, TREE_TYPE (arg), arg, inc); |
3e4093b6 | 4541 | TREE_SIDE_EFFECTS (val) = 1; |
3e4093b6 | 4542 | if (TREE_CODE (val) != code) |
6de9cd9a | 4543 | TREE_NO_WARNING (val) = 1; |
c9f9eb5d AH |
4544 | ret = val; |
4545 | goto return_build_unary_op; | |
3e4093b6 RS |
4546 | } |
4547 | ||
4548 | case ADDR_EXPR: | |
4549 | /* Note that this operation never does default_conversion. */ | |
4550 | ||
2b4b7036 JM |
4551 | /* The operand of unary '&' must be an lvalue (which excludes |
4552 | expressions of type void), or, in C99, the result of a [] or | |
4553 | unary '*' operator. */ | |
4554 | if (VOID_TYPE_P (TREE_TYPE (arg)) | |
4555 | && TYPE_QUALS (TREE_TYPE (arg)) == TYPE_UNQUALIFIED | |
22d03525 | 4556 | && (!INDIRECT_REF_P (arg) || !flag_isoc99)) |
2b4b7036 JM |
4557 | pedwarn (location, 0, "taking address of expression of type %<void%>"); |
4558 | ||
3e4093b6 | 4559 | /* Let &* cancel out to simplify resulting code. */ |
22d03525 | 4560 | if (INDIRECT_REF_P (arg)) |
400fbf9f | 4561 | { |
3e4093b6 RS |
4562 | /* Don't let this be an lvalue. */ |
4563 | if (lvalue_p (TREE_OPERAND (arg, 0))) | |
db3927fb | 4564 | return non_lvalue_loc (location, TREE_OPERAND (arg, 0)); |
c9f9eb5d AH |
4565 | ret = TREE_OPERAND (arg, 0); |
4566 | goto return_build_unary_op; | |
400fbf9f | 4567 | } |
1eb8759b | 4568 | |
3e4093b6 RS |
4569 | /* Anything not already handled and not a true memory reference |
4570 | or a non-lvalue array is an error. */ | |
4c13ba17 | 4571 | if (typecode != FUNCTION_TYPE && !noconvert |
ee45a32d | 4572 | && !lvalue_or_else (location, arg, lv_addressof)) |
3e4093b6 | 4573 | return error_mark_node; |
b6a10c9f | 4574 | |
928c19bb JM |
4575 | /* Move address operations inside C_MAYBE_CONST_EXPR to simplify |
4576 | folding later. */ | |
4577 | if (TREE_CODE (arg) == C_MAYBE_CONST_EXPR) | |
4578 | { | |
4579 | tree inner = build_unary_op (location, code, | |
4c13ba17 MP |
4580 | C_MAYBE_CONST_EXPR_EXPR (arg), |
4581 | noconvert); | |
928c19bb JM |
4582 | ret = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (inner), |
4583 | C_MAYBE_CONST_EXPR_PRE (arg), inner); | |
4584 | gcc_assert (!C_MAYBE_CONST_EXPR_INT_OPERANDS (arg)); | |
4585 | C_MAYBE_CONST_EXPR_NON_CONST (ret) | |
4586 | = C_MAYBE_CONST_EXPR_NON_CONST (arg); | |
4587 | goto return_build_unary_op; | |
4588 | } | |
4589 | ||
3e4093b6 RS |
4590 | /* Ordinary case; arg is a COMPONENT_REF or a decl. */ |
4591 | argtype = TREE_TYPE (arg); | |
400fbf9f | 4592 | |
3e4093b6 | 4593 | /* If the lvalue is const or volatile, merge that into the type |
e73a83fc | 4594 | to which the address will point. This is only needed |
f2c1da78 | 4595 | for function types. */ |
6615c446 | 4596 | if ((DECL_P (arg) || REFERENCE_CLASS_P (arg)) |
e73a83fc RB |
4597 | && (TREE_READONLY (arg) || TREE_THIS_VOLATILE (arg)) |
4598 | && TREE_CODE (argtype) == FUNCTION_TYPE) | |
f2c1da78 JM |
4599 | { |
4600 | int orig_quals = TYPE_QUALS (strip_array_types (argtype)); | |
4601 | int quals = orig_quals; | |
4602 | ||
4603 | if (TREE_READONLY (arg)) | |
4604 | quals |= TYPE_QUAL_CONST; | |
4605 | if (TREE_THIS_VOLATILE (arg)) | |
4606 | quals |= TYPE_QUAL_VOLATILE; | |
4607 | ||
f2c1da78 JM |
4608 | argtype = c_build_qualified_type (argtype, quals); |
4609 | } | |
400fbf9f | 4610 | |
ee45a32d EB |
4611 | switch (TREE_CODE (arg)) |
4612 | { | |
4613 | case COMPONENT_REF: | |
4614 | if (DECL_C_BIT_FIELD (TREE_OPERAND (arg, 1))) | |
4615 | { | |
949505a9 MP |
4616 | error_at (location, "cannot take address of bit-field %qD", |
4617 | TREE_OPERAND (arg, 1)); | |
ee45a32d EB |
4618 | return error_mark_node; |
4619 | } | |
4620 | ||
191816a3 | 4621 | /* fall through */ |
ee45a32d EB |
4622 | |
4623 | case ARRAY_REF: | |
4624 | if (TYPE_REVERSE_STORAGE_ORDER (TREE_TYPE (TREE_OPERAND (arg, 0)))) | |
4625 | { | |
4626 | if (!AGGREGATE_TYPE_P (TREE_TYPE (arg)) | |
4627 | && !VECTOR_TYPE_P (TREE_TYPE (arg))) | |
4628 | { | |
949505a9 MP |
4629 | error_at (location, "cannot take address of scalar with " |
4630 | "reverse storage order"); | |
ee45a32d EB |
4631 | return error_mark_node; |
4632 | } | |
4633 | ||
4634 | if (TREE_CODE (TREE_TYPE (arg)) == ARRAY_TYPE | |
4635 | && TYPE_REVERSE_STORAGE_ORDER (TREE_TYPE (arg))) | |
949505a9 MP |
4636 | warning_at (location, OPT_Wscalar_storage_order, |
4637 | "address of array with reverse scalar storage " | |
4638 | "order requested"); | |
ee45a32d EB |
4639 | } |
4640 | ||
4641 | default: | |
4642 | break; | |
4643 | } | |
4644 | ||
3e4093b6 RS |
4645 | if (!c_mark_addressable (arg)) |
4646 | return error_mark_node; | |
400fbf9f | 4647 | |
abb54d14 JM |
4648 | gcc_assert (TREE_CODE (arg) != COMPONENT_REF |
4649 | || !DECL_C_BIT_FIELD (TREE_OPERAND (arg, 1))); | |
400fbf9f | 4650 | |
5cc200fc | 4651 | argtype = build_pointer_type (argtype); |
5e55f99d RH |
4652 | |
4653 | /* ??? Cope with user tricks that amount to offsetof. Delete this | |
4654 | when we have proper support for integer constant expressions. */ | |
4655 | val = get_base_address (arg); | |
22d03525 | 4656 | if (val && INDIRECT_REF_P (val) |
3aa2ddb8 JJ |
4657 | && TREE_CONSTANT (TREE_OPERAND (val, 0))) |
4658 | { | |
cf9e9959 | 4659 | ret = fold_convert_loc (location, argtype, fold_offsetof_1 (arg)); |
c9f9eb5d | 4660 | goto return_build_unary_op; |
3aa2ddb8 | 4661 | } |
5e55f99d | 4662 | |
5cc200fc | 4663 | val = build1 (ADDR_EXPR, argtype, arg); |
400fbf9f | 4664 | |
c9f9eb5d AH |
4665 | ret = val; |
4666 | goto return_build_unary_op; | |
400fbf9f | 4667 | |
3e4093b6 | 4668 | default: |
1344f9a3 | 4669 | gcc_unreachable (); |
3e4093b6 | 4670 | } |
400fbf9f | 4671 | |
3fa8871b | 4672 | if (argtype == NULL_TREE) |
3e4093b6 | 4673 | argtype = TREE_TYPE (arg); |
928c19bb JM |
4674 | if (TREE_CODE (arg) == INTEGER_CST) |
4675 | ret = (require_constant_value | |
db3927fb AH |
4676 | ? fold_build1_initializer_loc (location, code, argtype, arg) |
4677 | : fold_build1_loc (location, code, argtype, arg)); | |
928c19bb JM |
4678 | else |
4679 | ret = build1 (code, argtype, arg); | |
c9f9eb5d AH |
4680 | return_build_unary_op: |
4681 | gcc_assert (ret != error_mark_node); | |
928c19bb JM |
4682 | if (TREE_CODE (ret) == INTEGER_CST && !TREE_OVERFLOW (ret) |
4683 | && !(TREE_CODE (xarg) == INTEGER_CST && !TREE_OVERFLOW (xarg))) | |
4684 | ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret); | |
4685 | else if (TREE_CODE (ret) != INTEGER_CST && int_operands) | |
4686 | ret = note_integer_operands (ret); | |
8ce94e44 JM |
4687 | if (eptype) |
4688 | ret = build1 (EXCESS_PRECISION_EXPR, eptype, ret); | |
c9f9eb5d AH |
4689 | protected_set_expr_location (ret, location); |
4690 | return ret; | |
3e4093b6 | 4691 | } |
400fbf9f | 4692 | |
3e4093b6 RS |
4693 | /* Return nonzero if REF is an lvalue valid for this language. |
4694 | Lvalues can be assigned, unless their type has TYPE_READONLY. | |
5baeaac0 | 4695 | Lvalues can have their address taken, unless they have C_DECL_REGISTER. */ |
400fbf9f | 4696 | |
1e4ae551 | 4697 | bool |
58f9752a | 4698 | lvalue_p (const_tree ref) |
3e4093b6 | 4699 | { |
58f9752a | 4700 | const enum tree_code code = TREE_CODE (ref); |
400fbf9f | 4701 | |
3e4093b6 RS |
4702 | switch (code) |
4703 | { | |
4704 | case REALPART_EXPR: | |
4705 | case IMAGPART_EXPR: | |
4706 | case COMPONENT_REF: | |
4707 | return lvalue_p (TREE_OPERAND (ref, 0)); | |
400fbf9f | 4708 | |
928c19bb JM |
4709 | case C_MAYBE_CONST_EXPR: |
4710 | return lvalue_p (TREE_OPERAND (ref, 1)); | |
4711 | ||
3e4093b6 RS |
4712 | case COMPOUND_LITERAL_EXPR: |
4713 | case STRING_CST: | |
5b73d2ab | 4714 | return true; |
400fbf9f | 4715 | |
3e4093b6 RS |
4716 | case INDIRECT_REF: |
4717 | case ARRAY_REF: | |
4718 | case VAR_DECL: | |
4719 | case PARM_DECL: | |
4720 | case RESULT_DECL: | |
4721 | case ERROR_MARK: | |
4722 | return (TREE_CODE (TREE_TYPE (ref)) != FUNCTION_TYPE | |
4723 | && TREE_CODE (TREE_TYPE (ref)) != METHOD_TYPE); | |
665f2503 | 4724 | |
3e4093b6 | 4725 | case BIND_EXPR: |
3e4093b6 | 4726 | return TREE_CODE (TREE_TYPE (ref)) == ARRAY_TYPE; |
665f2503 | 4727 | |
3e4093b6 | 4728 | default: |
5b73d2ab | 4729 | return false; |
3e4093b6 RS |
4730 | } |
4731 | } | |
400fbf9f | 4732 | \f |
f37acdf9 JM |
4733 | /* Give a warning for storing in something that is read-only in GCC |
4734 | terms but not const in ISO C terms. */ | |
4735 | ||
4736 | static void | |
4737 | readonly_warning (tree arg, enum lvalue_use use) | |
4738 | { | |
4739 | switch (use) | |
4740 | { | |
4741 | case lv_assign: | |
4742 | warning (0, "assignment of read-only location %qE", arg); | |
4743 | break; | |
4744 | case lv_increment: | |
4745 | warning (0, "increment of read-only location %qE", arg); | |
4746 | break; | |
4747 | case lv_decrement: | |
4748 | warning (0, "decrement of read-only location %qE", arg); | |
4749 | break; | |
4750 | default: | |
4751 | gcc_unreachable (); | |
4752 | } | |
4753 | return; | |
4754 | } | |
4755 | ||
37dc0d8d JM |
4756 | |
4757 | /* Return nonzero if REF is an lvalue valid for this language; | |
4758 | otherwise, print an error message and return zero. USE says | |
7bd11157 TT |
4759 | how the lvalue is being used and so selects the error message. |
4760 | LOCATION is the location at which any error should be reported. */ | |
37dc0d8d JM |
4761 | |
4762 | static int | |
7bd11157 | 4763 | lvalue_or_else (location_t loc, const_tree ref, enum lvalue_use use) |
37dc0d8d JM |
4764 | { |
4765 | int win = lvalue_p (ref); | |
4766 | ||
4767 | if (!win) | |
7bd11157 | 4768 | lvalue_error (loc, use); |
37dc0d8d JM |
4769 | |
4770 | return win; | |
4771 | } | |
3e4093b6 RS |
4772 | \f |
4773 | /* Mark EXP saying that we need to be able to take the | |
4774 | address of it; it should not be allocated in a register. | |
a9e4a1a5 JJ |
4775 | Returns true if successful. ARRAY_REF_P is true if this |
4776 | is for ARRAY_REF construction - in that case we don't want | |
4777 | to look through VIEW_CONVERT_EXPR from VECTOR_TYPE to ARRAY_TYPE, | |
4778 | it is fine to use ARRAY_REFs for vector subscripts on vector | |
4779 | register variables. */ | |
54c93c30 | 4780 | |
3e4093b6 | 4781 | bool |
a9e4a1a5 | 4782 | c_mark_addressable (tree exp, bool array_ref_p) |
400fbf9f | 4783 | { |
3e4093b6 | 4784 | tree x = exp; |
95602da1 | 4785 | |
3e4093b6 RS |
4786 | while (1) |
4787 | switch (TREE_CODE (x)) | |
4788 | { | |
a9e4a1a5 JJ |
4789 | case VIEW_CONVERT_EXPR: |
4790 | if (array_ref_p | |
4791 | && TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE | |
4792 | && VECTOR_TYPE_P (TREE_TYPE (TREE_OPERAND (x, 0)))) | |
4793 | return true; | |
4794 | /* FALLTHRU */ | |
3e4093b6 | 4795 | case COMPONENT_REF: |
3e4093b6 RS |
4796 | case ADDR_EXPR: |
4797 | case ARRAY_REF: | |
4798 | case REALPART_EXPR: | |
4799 | case IMAGPART_EXPR: | |
4800 | x = TREE_OPERAND (x, 0); | |
4801 | break; | |
95602da1 | 4802 | |
3e4093b6 RS |
4803 | case COMPOUND_LITERAL_EXPR: |
4804 | case CONSTRUCTOR: | |
4805 | TREE_ADDRESSABLE (x) = 1; | |
4806 | return true; | |
95602da1 | 4807 | |
3e4093b6 RS |
4808 | case VAR_DECL: |
4809 | case CONST_DECL: | |
4810 | case PARM_DECL: | |
4811 | case RESULT_DECL: | |
5baeaac0 | 4812 | if (C_DECL_REGISTER (x) |
3e4093b6 RS |
4813 | && DECL_NONLOCAL (x)) |
4814 | { | |
62f9079a | 4815 | if (TREE_PUBLIC (x) || is_global_var (x)) |
3e4093b6 | 4816 | { |
0039fa55 AN |
4817 | error |
4818 | ("global register variable %qD used in nested function", x); | |
3e4093b6 RS |
4819 | return false; |
4820 | } | |
509c9d60 | 4821 | pedwarn (input_location, 0, "register variable %qD used in nested function", x); |
3e4093b6 | 4822 | } |
5baeaac0 | 4823 | else if (C_DECL_REGISTER (x)) |
3e4093b6 | 4824 | { |
62f9079a | 4825 | if (TREE_PUBLIC (x) || is_global_var (x)) |
0039fa55 AN |
4826 | error ("address of global register variable %qD requested", x); |
4827 | else | |
4828 | error ("address of register variable %qD requested", x); | |
4829 | return false; | |
3e4093b6 | 4830 | } |
400fbf9f | 4831 | |
191816a3 | 4832 | /* FALLTHRU */ |
3e4093b6 RS |
4833 | case FUNCTION_DECL: |
4834 | TREE_ADDRESSABLE (x) = 1; | |
191816a3 | 4835 | /* FALLTHRU */ |
3e4093b6 RS |
4836 | default: |
4837 | return true; | |
4838 | } | |
4839 | } | |
4840 | \f | |
2d2e923f MLI |
4841 | /* Convert EXPR to TYPE, warning about conversion problems with |
4842 | constants. SEMANTIC_TYPE is the type this conversion would use | |
4843 | without excess precision. If SEMANTIC_TYPE is NULL, this function | |
4844 | is equivalent to convert_and_check. This function is a wrapper that | |
4845 | handles conversions that may be different than | |
4846 | the usual ones because of excess precision. */ | |
4847 | ||
4848 | static tree | |
68fca595 MP |
4849 | ep_convert_and_check (location_t loc, tree type, tree expr, |
4850 | tree semantic_type) | |
2d2e923f MLI |
4851 | { |
4852 | if (TREE_TYPE (expr) == type) | |
4853 | return expr; | |
4854 | ||
bb75facd JM |
4855 | /* For C11, integer conversions may have results with excess |
4856 | precision. */ | |
4857 | if (flag_isoc11 || !semantic_type) | |
68fca595 | 4858 | return convert_and_check (loc, type, expr); |
2d2e923f MLI |
4859 | |
4860 | if (TREE_CODE (TREE_TYPE (expr)) == INTEGER_TYPE | |
4861 | && TREE_TYPE (expr) != semantic_type) | |
4862 | { | |
4863 | /* For integers, we need to check the real conversion, not | |
4864 | the conversion to the excess precision type. */ | |
68fca595 | 4865 | expr = convert_and_check (loc, semantic_type, expr); |
2d2e923f MLI |
4866 | } |
4867 | /* Result type is the excess precision type, which should be | |
4868 | large enough, so do not check. */ | |
4869 | return convert (type, expr); | |
4870 | } | |
4871 | ||
928c19bb JM |
4872 | /* Build and return a conditional expression IFEXP ? OP1 : OP2. If |
4873 | IFEXP_BCP then the condition is a call to __builtin_constant_p, and | |
4874 | if folded to an integer constant then the unselected half may | |
4875 | contain arbitrary operations not normally permitted in constant | |
c2255bc4 | 4876 | expressions. Set the location of the expression to LOC. */ |
400fbf9f JW |
4877 | |
4878 | tree | |
744aa42f | 4879 | build_conditional_expr (location_t colon_loc, tree ifexp, bool ifexp_bcp, |
a32c8316 MP |
4880 | tree op1, tree op1_original_type, location_t op1_loc, |
4881 | tree op2, tree op2_original_type, location_t op2_loc) | |
400fbf9f | 4882 | { |
3e4093b6 RS |
4883 | tree type1; |
4884 | tree type2; | |
4885 | enum tree_code code1; | |
4886 | enum tree_code code2; | |
4887 | tree result_type = NULL; | |
2d2e923f | 4888 | tree semantic_result_type = NULL; |
3e4093b6 | 4889 | tree orig_op1 = op1, orig_op2 = op2; |
928c19bb | 4890 | bool int_const, op1_int_operands, op2_int_operands, int_operands; |
4d84fe7c | 4891 | bool ifexp_int_operands; |
928c19bb | 4892 | tree ret; |
400fbf9f | 4893 | |
4d84fe7c JM |
4894 | op1_int_operands = EXPR_INT_CONST_OPERANDS (orig_op1); |
4895 | if (op1_int_operands) | |
4896 | op1 = remove_c_maybe_const_expr (op1); | |
4897 | op2_int_operands = EXPR_INT_CONST_OPERANDS (orig_op2); | |
4898 | if (op2_int_operands) | |
4899 | op2 = remove_c_maybe_const_expr (op2); | |
4900 | ifexp_int_operands = EXPR_INT_CONST_OPERANDS (ifexp); | |
4901 | if (ifexp_int_operands) | |
4902 | ifexp = remove_c_maybe_const_expr (ifexp); | |
4903 | ||
3e4093b6 RS |
4904 | /* Promote both alternatives. */ |
4905 | ||
4906 | if (TREE_CODE (TREE_TYPE (op1)) != VOID_TYPE) | |
4907 | op1 = default_conversion (op1); | |
4908 | if (TREE_CODE (TREE_TYPE (op2)) != VOID_TYPE) | |
4909 | op2 = default_conversion (op2); | |
4910 | ||
4911 | if (TREE_CODE (ifexp) == ERROR_MARK | |
4912 | || TREE_CODE (TREE_TYPE (op1)) == ERROR_MARK | |
4913 | || TREE_CODE (TREE_TYPE (op2)) == ERROR_MARK) | |
400fbf9f | 4914 | return error_mark_node; |
400fbf9f | 4915 | |
3e4093b6 RS |
4916 | type1 = TREE_TYPE (op1); |
4917 | code1 = TREE_CODE (type1); | |
4918 | type2 = TREE_TYPE (op2); | |
4919 | code2 = TREE_CODE (type2); | |
4920 | ||
1807ffc1 MS |
4921 | if (code1 == POINTER_TYPE && reject_gcc_builtin (op1)) |
4922 | return error_mark_node; | |
4923 | ||
4924 | if (code2 == POINTER_TYPE && reject_gcc_builtin (op2)) | |
4925 | return error_mark_node; | |
4926 | ||
b1adf557 JM |
4927 | /* C90 does not permit non-lvalue arrays in conditional expressions. |
4928 | In C99 they will be pointers by now. */ | |
4929 | if (code1 == ARRAY_TYPE || code2 == ARRAY_TYPE) | |
4930 | { | |
744aa42f | 4931 | error_at (colon_loc, "non-lvalue array in conditional expression"); |
b1adf557 JM |
4932 | return error_mark_node; |
4933 | } | |
4934 | ||
8ce94e44 JM |
4935 | if ((TREE_CODE (op1) == EXCESS_PRECISION_EXPR |
4936 | || TREE_CODE (op2) == EXCESS_PRECISION_EXPR) | |
4937 | && (code1 == INTEGER_TYPE || code1 == REAL_TYPE | |
4938 | || code1 == COMPLEX_TYPE) | |
4939 | && (code2 == INTEGER_TYPE || code2 == REAL_TYPE | |
4940 | || code2 == COMPLEX_TYPE)) | |
4941 | { | |
2d2e923f | 4942 | semantic_result_type = c_common_type (type1, type2); |
8ce94e44 JM |
4943 | if (TREE_CODE (op1) == EXCESS_PRECISION_EXPR) |
4944 | { | |
4945 | op1 = TREE_OPERAND (op1, 0); | |
4946 | type1 = TREE_TYPE (op1); | |
4947 | gcc_assert (TREE_CODE (type1) == code1); | |
4948 | } | |
4949 | if (TREE_CODE (op2) == EXCESS_PRECISION_EXPR) | |
4950 | { | |
4951 | op2 = TREE_OPERAND (op2, 0); | |
4952 | type2 = TREE_TYPE (op2); | |
4953 | gcc_assert (TREE_CODE (type2) == code2); | |
4954 | } | |
4955 | } | |
4956 | ||
d130ae11 ILT |
4957 | if (warn_cxx_compat) |
4958 | { | |
4959 | tree t1 = op1_original_type ? op1_original_type : TREE_TYPE (orig_op1); | |
4960 | tree t2 = op2_original_type ? op2_original_type : TREE_TYPE (orig_op2); | |
4961 | ||
4962 | if (TREE_CODE (t1) == ENUMERAL_TYPE | |
4963 | && TREE_CODE (t2) == ENUMERAL_TYPE | |
4964 | && TYPE_MAIN_VARIANT (t1) != TYPE_MAIN_VARIANT (t2)) | |
4965 | warning_at (colon_loc, OPT_Wc___compat, | |
4966 | ("different enum types in conditional is " | |
4967 | "invalid in C++: %qT vs %qT"), | |
4968 | t1, t2); | |
4969 | } | |
4970 | ||
3e4093b6 RS |
4971 | /* Quickly detect the usual case where op1 and op2 have the same type |
4972 | after promotion. */ | |
4973 | if (TYPE_MAIN_VARIANT (type1) == TYPE_MAIN_VARIANT (type2)) | |
400fbf9f | 4974 | { |
3e4093b6 RS |
4975 | if (type1 == type2) |
4976 | result_type = type1; | |
4977 | else | |
4978 | result_type = TYPE_MAIN_VARIANT (type1); | |
4979 | } | |
4980 | else if ((code1 == INTEGER_TYPE || code1 == REAL_TYPE | |
c22cacf3 MS |
4981 | || code1 == COMPLEX_TYPE) |
4982 | && (code2 == INTEGER_TYPE || code2 == REAL_TYPE | |
4983 | || code2 == COMPLEX_TYPE)) | |
3e4093b6 | 4984 | { |
bb75facd JM |
4985 | /* In C11, a conditional expression between a floating-point |
4986 | type and an integer type should convert the integer type to | |
4987 | the evaluation format of the floating-point type, with | |
4988 | possible excess precision. */ | |
4989 | tree eptype1 = type1; | |
4990 | tree eptype2 = type2; | |
4991 | if (flag_isoc11) | |
4992 | { | |
4993 | tree eptype; | |
4994 | if (ANY_INTEGRAL_TYPE_P (type1) | |
4995 | && (eptype = excess_precision_type (type2)) != NULL_TREE) | |
4996 | { | |
4997 | eptype2 = eptype; | |
4998 | if (!semantic_result_type) | |
4999 | semantic_result_type = c_common_type (type1, type2); | |
5000 | } | |
5001 | else if (ANY_INTEGRAL_TYPE_P (type2) | |
5002 | && (eptype = excess_precision_type (type1)) != NULL_TREE) | |
5003 | { | |
5004 | eptype1 = eptype; | |
5005 | if (!semantic_result_type) | |
5006 | semantic_result_type = c_common_type (type1, type2); | |
5007 | } | |
5008 | } | |
5009 | result_type = c_common_type (eptype1, eptype2); | |
5a578671 JM |
5010 | if (result_type == error_mark_node) |
5011 | return error_mark_node; | |
0a0b3574 MM |
5012 | do_warn_double_promotion (result_type, type1, type2, |
5013 | "implicit conversion from %qT to %qT to " | |
5014 | "match other result of conditional", | |
5015 | colon_loc); | |
400fbf9f | 5016 | |
3e4093b6 RS |
5017 | /* If -Wsign-compare, warn here if type1 and type2 have |
5018 | different signedness. We'll promote the signed to unsigned | |
5019 | and later code won't know it used to be different. | |
5020 | Do this check on the original types, so that explicit casts | |
5021 | will be considered, but default promotions won't. */ | |
7d882b83 | 5022 | if (c_inhibit_evaluation_warnings == 0) |
ab87f8c8 | 5023 | { |
8df83eae RK |
5024 | int unsigned_op1 = TYPE_UNSIGNED (TREE_TYPE (orig_op1)); |
5025 | int unsigned_op2 = TYPE_UNSIGNED (TREE_TYPE (orig_op2)); | |
400fbf9f | 5026 | |
3e4093b6 RS |
5027 | if (unsigned_op1 ^ unsigned_op2) |
5028 | { | |
6ac01510 ILT |
5029 | bool ovf; |
5030 | ||
3e4093b6 RS |
5031 | /* Do not warn if the result type is signed, since the |
5032 | signed type will only be chosen if it can represent | |
5033 | all the values of the unsigned type. */ | |
3f75a254 | 5034 | if (!TYPE_UNSIGNED (result_type)) |
3e4093b6 | 5035 | /* OK */; |
3e4093b6 | 5036 | else |
928c19bb JM |
5037 | { |
5038 | bool op1_maybe_const = true; | |
5039 | bool op2_maybe_const = true; | |
5040 | ||
5041 | /* Do not warn if the signed quantity is an | |
5042 | unsuffixed integer literal (or some static | |
5043 | constant expression involving such literals) and | |
5044 | it is non-negative. This warning requires the | |
5045 | operands to be folded for best results, so do | |
5046 | that folding in this case even without | |
5047 | warn_sign_compare to avoid warning options | |
5048 | possibly affecting code generation. */ | |
f5178456 RS |
5049 | c_inhibit_evaluation_warnings |
5050 | += (ifexp == truthvalue_false_node); | |
928c19bb JM |
5051 | op1 = c_fully_fold (op1, require_constant_value, |
5052 | &op1_maybe_const); | |
f5178456 RS |
5053 | c_inhibit_evaluation_warnings |
5054 | -= (ifexp == truthvalue_false_node); | |
5055 | ||
5056 | c_inhibit_evaluation_warnings | |
5057 | += (ifexp == truthvalue_true_node); | |
928c19bb JM |
5058 | op2 = c_fully_fold (op2, require_constant_value, |
5059 | &op2_maybe_const); | |
f5178456 RS |
5060 | c_inhibit_evaluation_warnings |
5061 | -= (ifexp == truthvalue_true_node); | |
928c19bb JM |
5062 | |
5063 | if (warn_sign_compare) | |
5064 | { | |
5065 | if ((unsigned_op2 | |
5066 | && tree_expr_nonnegative_warnv_p (op1, &ovf)) | |
5067 | || (unsigned_op1 | |
5068 | && tree_expr_nonnegative_warnv_p (op2, &ovf))) | |
5069 | /* OK */; | |
a32c8316 MP |
5070 | else if (unsigned_op2) |
5071 | warning_at (op1_loc, OPT_Wsign_compare, | |
5072 | "operand of ?: changes signedness from " | |
5073 | "%qT to %qT due to unsignedness of other " | |
5074 | "operand", TREE_TYPE (orig_op1), | |
5075 | TREE_TYPE (orig_op2)); | |
928c19bb | 5076 | else |
a32c8316 MP |
5077 | warning_at (op2_loc, OPT_Wsign_compare, |
5078 | "operand of ?: changes signedness from " | |
5079 | "%qT to %qT due to unsignedness of other " | |
5080 | "operand", TREE_TYPE (orig_op2), | |
5081 | TREE_TYPE (orig_op1)); | |
928c19bb JM |
5082 | } |
5083 | if (!op1_maybe_const || TREE_CODE (op1) != INTEGER_CST) | |
e5a94231 | 5084 | op1 = c_wrap_maybe_const (op1, !op1_maybe_const); |
928c19bb | 5085 | if (!op2_maybe_const || TREE_CODE (op2) != INTEGER_CST) |
e5a94231 | 5086 | op2 = c_wrap_maybe_const (op2, !op2_maybe_const); |
928c19bb | 5087 | } |
3e4093b6 RS |
5088 | } |
5089 | } | |
5090 | } | |
5091 | else if (code1 == VOID_TYPE || code2 == VOID_TYPE) | |
5092 | { | |
fcf73884 | 5093 | if (code1 != VOID_TYPE || code2 != VOID_TYPE) |
c1771a20 | 5094 | pedwarn (colon_loc, OPT_Wpedantic, |
fcf73884 | 5095 | "ISO C forbids conditional expr with only one void side"); |
3e4093b6 RS |
5096 | result_type = void_type_node; |
5097 | } | |
5098 | else if (code1 == POINTER_TYPE && code2 == POINTER_TYPE) | |
5099 | { | |
36c5e70a BE |
5100 | addr_space_t as1 = TYPE_ADDR_SPACE (TREE_TYPE (type1)); |
5101 | addr_space_t as2 = TYPE_ADDR_SPACE (TREE_TYPE (type2)); | |
5102 | addr_space_t as_common; | |
5103 | ||
744aa42f | 5104 | if (comp_target_types (colon_loc, type1, type2)) |
10bc1b1b | 5105 | result_type = common_pointer_type (type1, type2); |
6aa3c60d | 5106 | else if (null_pointer_constant_p (orig_op1)) |
36c5e70a | 5107 | result_type = type2; |
6aa3c60d | 5108 | else if (null_pointer_constant_p (orig_op2)) |
36c5e70a BE |
5109 | result_type = type1; |
5110 | else if (!addr_space_superset (as1, as2, &as_common)) | |
5111 | { | |
5112 | error_at (colon_loc, "pointers to disjoint address spaces " | |
5113 | "used in conditional expression"); | |
5114 | return error_mark_node; | |
5115 | } | |
267bac10 JM |
5116 | else if (VOID_TYPE_P (TREE_TYPE (type1)) |
5117 | && !TYPE_ATOMIC (TREE_TYPE (type1))) | |
34a80643 | 5118 | { |
768952be MU |
5119 | if ((TREE_CODE (TREE_TYPE (type2)) == ARRAY_TYPE) |
5120 | && (TYPE_QUALS (strip_array_types (TREE_TYPE (type2))) | |
5121 | & ~TYPE_QUALS (TREE_TYPE (type1)))) | |
5122 | warning_at (colon_loc, OPT_Wdiscarded_array_qualifiers, | |
5123 | "pointer to array loses qualifier " | |
5124 | "in conditional expression"); | |
5125 | ||
fcf73884 | 5126 | if (TREE_CODE (TREE_TYPE (type2)) == FUNCTION_TYPE) |
c1771a20 | 5127 | pedwarn (colon_loc, OPT_Wpedantic, |
509c9d60 | 5128 | "ISO C forbids conditional expr between " |
bda67431 | 5129 | "%<void *%> and function pointer"); |
3e4093b6 RS |
5130 | result_type = build_pointer_type (qualify_type (TREE_TYPE (type1), |
5131 | TREE_TYPE (type2))); | |
34a80643 | 5132 | } |
267bac10 JM |
5133 | else if (VOID_TYPE_P (TREE_TYPE (type2)) |
5134 | && !TYPE_ATOMIC (TREE_TYPE (type2))) | |
1c2a9b35 | 5135 | { |
768952be MU |
5136 | if ((TREE_CODE (TREE_TYPE (type1)) == ARRAY_TYPE) |
5137 | && (TYPE_QUALS (strip_array_types (TREE_TYPE (type1))) | |
5138 | & ~TYPE_QUALS (TREE_TYPE (type2)))) | |
5139 | warning_at (colon_loc, OPT_Wdiscarded_array_qualifiers, | |
5140 | "pointer to array loses qualifier " | |
5141 | "in conditional expression"); | |
5142 | ||
fcf73884 | 5143 | if (TREE_CODE (TREE_TYPE (type1)) == FUNCTION_TYPE) |
c1771a20 | 5144 | pedwarn (colon_loc, OPT_Wpedantic, |
509c9d60 | 5145 | "ISO C forbids conditional expr between " |
bda67431 | 5146 | "%<void *%> and function pointer"); |
3e4093b6 RS |
5147 | result_type = build_pointer_type (qualify_type (TREE_TYPE (type2), |
5148 | TREE_TYPE (type1))); | |
1c2a9b35 | 5149 | } |
b581b85b NP |
5150 | /* Objective-C pointer comparisons are a bit more lenient. */ |
5151 | else if (objc_have_common_type (type1, type2, -3, NULL_TREE)) | |
5152 | result_type = objc_common_type (type1, type2); | |
34a80643 | 5153 | else |
ab87f8c8 | 5154 | { |
36c5e70a BE |
5155 | int qual = ENCODE_QUAL_ADDR_SPACE (as_common); |
5156 | ||
b581b85b NP |
5157 | pedwarn (colon_loc, 0, |
5158 | "pointer type mismatch in conditional expression"); | |
36c5e70a BE |
5159 | result_type = build_pointer_type |
5160 | (build_qualified_type (void_type_node, qual)); | |
ab87f8c8 | 5161 | } |
3e4093b6 RS |
5162 | } |
5163 | else if (code1 == POINTER_TYPE && code2 == INTEGER_TYPE) | |
5164 | { | |
6aa3c60d | 5165 | if (!null_pointer_constant_p (orig_op2)) |
744aa42f | 5166 | pedwarn (colon_loc, 0, |
509c9d60 | 5167 | "pointer/integer type mismatch in conditional expression"); |
3e4093b6 | 5168 | else |
ab87f8c8 | 5169 | { |
3e4093b6 | 5170 | op2 = null_pointer_node; |
ab87f8c8 | 5171 | } |
3e4093b6 RS |
5172 | result_type = type1; |
5173 | } | |
5174 | else if (code2 == POINTER_TYPE && code1 == INTEGER_TYPE) | |
5175 | { | |
6aa3c60d | 5176 | if (!null_pointer_constant_p (orig_op1)) |
744aa42f | 5177 | pedwarn (colon_loc, 0, |
509c9d60 | 5178 | "pointer/integer type mismatch in conditional expression"); |
3e4093b6 | 5179 | else |
ab87f8c8 | 5180 | { |
3e4093b6 | 5181 | op1 = null_pointer_node; |
ab87f8c8 | 5182 | } |
3e4093b6 RS |
5183 | result_type = type2; |
5184 | } | |
1c2a9b35 | 5185 | |
3e4093b6 RS |
5186 | if (!result_type) |
5187 | { | |
5188 | if (flag_cond_mismatch) | |
5189 | result_type = void_type_node; | |
5190 | else | |
400fbf9f | 5191 | { |
c2255bc4 | 5192 | error_at (colon_loc, "type mismatch in conditional expression"); |
ab87f8c8 | 5193 | return error_mark_node; |
400fbf9f | 5194 | } |
3e4093b6 | 5195 | } |
400fbf9f | 5196 | |
3e4093b6 RS |
5197 | /* Merge const and volatile flags of the incoming types. */ |
5198 | result_type | |
5199 | = build_type_variant (result_type, | |
afbd0665 AS |
5200 | TYPE_READONLY (type1) || TYPE_READONLY (type2), |
5201 | TYPE_VOLATILE (type1) || TYPE_VOLATILE (type2)); | |
b6a10c9f | 5202 | |
68fca595 MP |
5203 | op1 = ep_convert_and_check (colon_loc, result_type, op1, |
5204 | semantic_result_type); | |
5205 | op2 = ep_convert_and_check (colon_loc, result_type, op2, | |
5206 | semantic_result_type); | |
b6a10c9f | 5207 | |
928c19bb JM |
5208 | if (ifexp_bcp && ifexp == truthvalue_true_node) |
5209 | { | |
5210 | op2_int_operands = true; | |
5211 | op1 = c_fully_fold (op1, require_constant_value, NULL); | |
5212 | } | |
5213 | if (ifexp_bcp && ifexp == truthvalue_false_node) | |
5214 | { | |
5215 | op1_int_operands = true; | |
5216 | op2 = c_fully_fold (op2, require_constant_value, NULL); | |
5217 | } | |
4d84fe7c | 5218 | int_const = int_operands = (ifexp_int_operands |
928c19bb JM |
5219 | && op1_int_operands |
5220 | && op2_int_operands); | |
5221 | if (int_operands) | |
5222 | { | |
5223 | int_const = ((ifexp == truthvalue_true_node | |
5224 | && TREE_CODE (orig_op1) == INTEGER_CST | |
5225 | && !TREE_OVERFLOW (orig_op1)) | |
5226 | || (ifexp == truthvalue_false_node | |
5227 | && TREE_CODE (orig_op2) == INTEGER_CST | |
5228 | && !TREE_OVERFLOW (orig_op2))); | |
5229 | } | |
9f47c7e5 IE |
5230 | |
5231 | /* Need to convert condition operand into a vector mask. */ | |
5232 | if (VECTOR_TYPE_P (TREE_TYPE (ifexp))) | |
5233 | { | |
5234 | tree vectype = TREE_TYPE (ifexp); | |
5235 | tree elem_type = TREE_TYPE (vectype); | |
5236 | tree zero = build_int_cst (elem_type, 0); | |
5237 | tree zero_vec = build_vector_from_val (vectype, zero); | |
5238 | tree cmp_type = build_same_sized_truth_vector_type (vectype); | |
5239 | ifexp = build2 (NE_EXPR, cmp_type, ifexp, zero_vec); | |
5240 | } | |
5241 | ||
928c19bb | 5242 | if (int_const || (ifexp_bcp && TREE_CODE (ifexp) == INTEGER_CST)) |
db3927fb | 5243 | ret = fold_build3_loc (colon_loc, COND_EXPR, result_type, ifexp, op1, op2); |
928c19bb JM |
5244 | else |
5245 | { | |
01c7ccbb JM |
5246 | if (int_operands) |
5247 | { | |
f34f1c87 MP |
5248 | /* Use c_fully_fold here, since C_MAYBE_CONST_EXPR might be |
5249 | nested inside of the expression. */ | |
5250 | op1 = c_fully_fold (op1, false, NULL); | |
5251 | op2 = c_fully_fold (op2, false, NULL); | |
01c7ccbb | 5252 | } |
928c19bb JM |
5253 | ret = build3 (COND_EXPR, result_type, ifexp, op1, op2); |
5254 | if (int_operands) | |
5255 | ret = note_integer_operands (ret); | |
5256 | } | |
2d2e923f MLI |
5257 | if (semantic_result_type) |
5258 | ret = build1 (EXCESS_PRECISION_EXPR, semantic_result_type, ret); | |
928c19bb | 5259 | |
c2255bc4 | 5260 | protected_set_expr_location (ret, colon_loc); |
2ebd93e1 MP |
5261 | |
5262 | /* If the OP1 and OP2 are the same and don't have side-effects, | |
5263 | warn here, because the COND_EXPR will be turned into OP1. */ | |
5264 | if (warn_duplicated_branches | |
5265 | && TREE_CODE (ret) == COND_EXPR | |
5266 | && (op1 == op2 || operand_equal_p (op1, op2, 0))) | |
5267 | warning_at (EXPR_LOCATION (ret), OPT_Wduplicated_branches, | |
5268 | "this condition has identical branches"); | |
5269 | ||
928c19bb | 5270 | return ret; |
3e4093b6 RS |
5271 | } |
5272 | \f | |
487a92fe | 5273 | /* Return a compound expression that performs two expressions and |
c2255bc4 AH |
5274 | returns the value of the second of them. |
5275 | ||
5276 | LOC is the location of the COMPOUND_EXPR. */ | |
400fbf9f | 5277 | |
3e4093b6 | 5278 | tree |
c2255bc4 | 5279 | build_compound_expr (location_t loc, tree expr1, tree expr2) |
3e4093b6 | 5280 | { |
4d84fe7c | 5281 | bool expr1_int_operands, expr2_int_operands; |
8ce94e44 | 5282 | tree eptype = NULL_TREE; |
928c19bb JM |
5283 | tree ret; |
5284 | ||
4d84fe7c JM |
5285 | expr1_int_operands = EXPR_INT_CONST_OPERANDS (expr1); |
5286 | if (expr1_int_operands) | |
5287 | expr1 = remove_c_maybe_const_expr (expr1); | |
5288 | expr2_int_operands = EXPR_INT_CONST_OPERANDS (expr2); | |
5289 | if (expr2_int_operands) | |
5290 | expr2 = remove_c_maybe_const_expr (expr2); | |
5291 | ||
8ce94e44 JM |
5292 | if (TREE_CODE (expr1) == EXCESS_PRECISION_EXPR) |
5293 | expr1 = TREE_OPERAND (expr1, 0); | |
5294 | if (TREE_CODE (expr2) == EXCESS_PRECISION_EXPR) | |
5295 | { | |
5296 | eptype = TREE_TYPE (expr2); | |
5297 | expr2 = TREE_OPERAND (expr2, 0); | |
5298 | } | |
5299 | ||
3f75a254 | 5300 | if (!TREE_SIDE_EFFECTS (expr1)) |
3e4093b6 RS |
5301 | { |
5302 | /* The left-hand operand of a comma expression is like an expression | |
c5409249 | 5303 | statement: with -Wunused, we should warn if it doesn't have |
3e4093b6 | 5304 | any side-effects, unless it was explicitly cast to (void). */ |
e14a6540 | 5305 | if (warn_unused_value) |
47aecf47 | 5306 | { |
e14a6540 | 5307 | if (VOID_TYPE_P (TREE_TYPE (expr1)) |
1043771b | 5308 | && CONVERT_EXPR_P (expr1)) |
47aecf47 | 5309 | ; /* (void) a, b */ |
e14a6540 JM |
5310 | else if (VOID_TYPE_P (TREE_TYPE (expr1)) |
5311 | && TREE_CODE (expr1) == COMPOUND_EXPR | |
1043771b | 5312 | && CONVERT_EXPR_P (TREE_OPERAND (expr1, 1))) |
47aecf47 JM |
5313 | ; /* (void) a, (void) b, c */ |
5314 | else | |
b8698a0f | 5315 | warning_at (loc, OPT_Wunused_value, |
c2255bc4 | 5316 | "left-hand operand of comma expression has no effect"); |
47aecf47 | 5317 | } |
3e4093b6 | 5318 | } |
789eadcd MP |
5319 | else if (TREE_CODE (expr1) == COMPOUND_EXPR |
5320 | && warn_unused_value) | |
5321 | { | |
5322 | tree r = expr1; | |
5323 | location_t cloc = loc; | |
5324 | while (TREE_CODE (r) == COMPOUND_EXPR) | |
5325 | { | |
5326 | if (EXPR_HAS_LOCATION (r)) | |
5327 | cloc = EXPR_LOCATION (r); | |
5328 | r = TREE_OPERAND (r, 1); | |
5329 | } | |
5330 | if (!TREE_SIDE_EFFECTS (r) | |
5331 | && !VOID_TYPE_P (TREE_TYPE (r)) | |
5332 | && !CONVERT_EXPR_P (r)) | |
5333 | warning_at (cloc, OPT_Wunused_value, | |
5334 | "right-hand operand of comma expression has no effect"); | |
5335 | } | |
400fbf9f | 5336 | |
3e4093b6 RS |
5337 | /* With -Wunused, we should also warn if the left-hand operand does have |
5338 | side-effects, but computes a value which is not used. For example, in | |
5339 | `foo() + bar(), baz()' the result of the `+' operator is not used, | |
5340 | so we should issue a warning. */ | |
5341 | else if (warn_unused_value) | |
c2255bc4 | 5342 | warn_if_unused_value (expr1, loc); |
400fbf9f | 5343 | |
e63d6886 AP |
5344 | if (expr2 == error_mark_node) |
5345 | return error_mark_node; | |
5346 | ||
928c19bb JM |
5347 | ret = build2 (COMPOUND_EXPR, TREE_TYPE (expr2), expr1, expr2); |
5348 | ||
5349 | if (flag_isoc99 | |
4d84fe7c JM |
5350 | && expr1_int_operands |
5351 | && expr2_int_operands) | |
928c19bb JM |
5352 | ret = note_integer_operands (ret); |
5353 | ||
8ce94e44 JM |
5354 | if (eptype) |
5355 | ret = build1 (EXCESS_PRECISION_EXPR, eptype, ret); | |
5356 | ||
c2255bc4 | 5357 | protected_set_expr_location (ret, loc); |
928c19bb | 5358 | return ret; |
3e4093b6 | 5359 | } |
400fbf9f | 5360 | |
67165eb3 ILT |
5361 | /* Issue -Wcast-qual warnings when appropriate. TYPE is the type to |
5362 | which we are casting. OTYPE is the type of the expression being | |
2ee3cb35 MLI |
5363 | cast. Both TYPE and OTYPE are pointer types. LOC is the location |
5364 | of the cast. -Wcast-qual appeared on the command line. Named | |
5365 | address space qualifiers are not handled here, because they result | |
5366 | in different warnings. */ | |
67165eb3 ILT |
5367 | |
5368 | static void | |
2ee3cb35 | 5369 | handle_warn_cast_qual (location_t loc, tree type, tree otype) |
67165eb3 ILT |
5370 | { |
5371 | tree in_type = type; | |
5372 | tree in_otype = otype; | |
5373 | int added = 0; | |
5374 | int discarded = 0; | |
5375 | bool is_const; | |
5376 | ||
5377 | /* Check that the qualifiers on IN_TYPE are a superset of the | |
5378 | qualifiers of IN_OTYPE. The outermost level of POINTER_TYPE | |
5379 | nodes is uninteresting and we stop as soon as we hit a | |
5380 | non-POINTER_TYPE node on either type. */ | |
5381 | do | |
5382 | { | |
5383 | in_otype = TREE_TYPE (in_otype); | |
5384 | in_type = TREE_TYPE (in_type); | |
5385 | ||
5386 | /* GNU C allows cv-qualified function types. 'const' means the | |
5387 | function is very pure, 'volatile' means it can't return. We | |
5388 | need to warn when such qualifiers are added, not when they're | |
5389 | taken away. */ | |
5390 | if (TREE_CODE (in_otype) == FUNCTION_TYPE | |
5391 | && TREE_CODE (in_type) == FUNCTION_TYPE) | |
36c5e70a BE |
5392 | added |= (TYPE_QUALS_NO_ADDR_SPACE (in_type) |
5393 | & ~TYPE_QUALS_NO_ADDR_SPACE (in_otype)); | |
67165eb3 | 5394 | else |
36c5e70a BE |
5395 | discarded |= (TYPE_QUALS_NO_ADDR_SPACE (in_otype) |
5396 | & ~TYPE_QUALS_NO_ADDR_SPACE (in_type)); | |
67165eb3 ILT |
5397 | } |
5398 | while (TREE_CODE (in_type) == POINTER_TYPE | |
5399 | && TREE_CODE (in_otype) == POINTER_TYPE); | |
5400 | ||
5401 | if (added) | |
2ee3cb35 MLI |
5402 | warning_at (loc, OPT_Wcast_qual, |
5403 | "cast adds %q#v qualifier to function type", added); | |
67165eb3 ILT |
5404 | |
5405 | if (discarded) | |
5406 | /* There are qualifiers present in IN_OTYPE that are not present | |
5407 | in IN_TYPE. */ | |
2ee3cb35 | 5408 | warning_at (loc, OPT_Wcast_qual, |
7485aeea | 5409 | "cast discards %qv qualifier from pointer target type", |
2ee3cb35 | 5410 | discarded); |
67165eb3 ILT |
5411 | |
5412 | if (added || discarded) | |
5413 | return; | |
5414 | ||
5415 | /* A cast from **T to const **T is unsafe, because it can cause a | |
5416 | const value to be changed with no additional warning. We only | |
5417 | issue this warning if T is the same on both sides, and we only | |
5418 | issue the warning if there are the same number of pointers on | |
5419 | both sides, as otherwise the cast is clearly unsafe anyhow. A | |
5420 | cast is unsafe when a qualifier is added at one level and const | |
5421 | is not present at all outer levels. | |
5422 | ||
5423 | To issue this warning, we check at each level whether the cast | |
5424 | adds new qualifiers not already seen. We don't need to special | |
5425 | case function types, as they won't have the same | |
5426 | TYPE_MAIN_VARIANT. */ | |
5427 | ||
5428 | if (TYPE_MAIN_VARIANT (in_type) != TYPE_MAIN_VARIANT (in_otype)) | |
5429 | return; | |
5430 | if (TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE) | |
5431 | return; | |
5432 | ||
5433 | in_type = type; | |
5434 | in_otype = otype; | |
5435 | is_const = TYPE_READONLY (TREE_TYPE (in_type)); | |
5436 | do | |
5437 | { | |
5438 | in_type = TREE_TYPE (in_type); | |
5439 | in_otype = TREE_TYPE (in_otype); | |
5440 | if ((TYPE_QUALS (in_type) &~ TYPE_QUALS (in_otype)) != 0 | |
5441 | && !is_const) | |
5442 | { | |
2ee3cb35 MLI |
5443 | warning_at (loc, OPT_Wcast_qual, |
5444 | "to be safe all intermediate pointers in cast from " | |
5445 | "%qT to %qT must be %<const%> qualified", | |
5446 | otype, type); | |
67165eb3 ILT |
5447 | break; |
5448 | } | |
5449 | if (is_const) | |
5450 | is_const = TYPE_READONLY (in_type); | |
5451 | } | |
5452 | while (TREE_CODE (in_type) == POINTER_TYPE); | |
5453 | } | |
5454 | ||
b8698a0f | 5455 | /* Build an expression representing a cast to type TYPE of expression EXPR. |
c2255bc4 | 5456 | LOC is the location of the cast-- typically the open paren of the cast. */ |
400fbf9f | 5457 | |
3e4093b6 | 5458 | tree |
c2255bc4 | 5459 | build_c_cast (location_t loc, tree type, tree expr) |
3e4093b6 | 5460 | { |
8ce94e44 JM |
5461 | tree value; |
5462 | ||
5463 | if (TREE_CODE (expr) == EXCESS_PRECISION_EXPR) | |
5464 | expr = TREE_OPERAND (expr, 0); | |
5465 | ||
5466 | value = expr; | |
400fbf9f | 5467 | |
3e4093b6 RS |
5468 | if (type == error_mark_node || expr == error_mark_node) |
5469 | return error_mark_node; | |
400fbf9f | 5470 | |
3e4093b6 RS |
5471 | /* The ObjC front-end uses TYPE_MAIN_VARIANT to tie together types differing |
5472 | only in <protocol> qualifications. But when constructing cast expressions, | |
5473 | the protocols do matter and must be kept around. */ | |
700686fa ZL |
5474 | if (objc_is_object_ptr (type) && objc_is_object_ptr (TREE_TYPE (expr))) |
5475 | return build1 (NOP_EXPR, type, expr); | |
5476 | ||
5477 | type = TYPE_MAIN_VARIANT (type); | |
400fbf9f | 5478 | |
3e4093b6 RS |
5479 | if (TREE_CODE (type) == ARRAY_TYPE) |
5480 | { | |
c2255bc4 | 5481 | error_at (loc, "cast specifies array type"); |
3e4093b6 RS |
5482 | return error_mark_node; |
5483 | } | |
400fbf9f | 5484 | |
3e4093b6 RS |
5485 | if (TREE_CODE (type) == FUNCTION_TYPE) |
5486 | { | |
c2255bc4 | 5487 | error_at (loc, "cast specifies function type"); |
3e4093b6 RS |
5488 | return error_mark_node; |
5489 | } | |
400fbf9f | 5490 | |
808d6eaa JM |
5491 | if (!VOID_TYPE_P (type)) |
5492 | { | |
4f2e1536 | 5493 | value = require_complete_type (loc, value); |
808d6eaa JM |
5494 | if (value == error_mark_node) |
5495 | return error_mark_node; | |
5496 | } | |
5497 | ||
3e4093b6 RS |
5498 | if (type == TYPE_MAIN_VARIANT (TREE_TYPE (value))) |
5499 | { | |
3e636daf | 5500 | if (RECORD_OR_UNION_TYPE_P (type)) |
c1771a20 | 5501 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 5502 | "ISO C forbids casting nonscalar to the same type"); |
c77935ee PP |
5503 | |
5504 | /* Convert to remove any qualifiers from VALUE's type. */ | |
5505 | value = convert (type, value); | |
3e4093b6 RS |
5506 | } |
5507 | else if (TREE_CODE (type) == UNION_TYPE) | |
5508 | { | |
5509 | tree field; | |
400fbf9f | 5510 | |
910ad8de | 5511 | for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field)) |
39ffbac9 VR |
5512 | if (TREE_TYPE (field) != error_mark_node |
5513 | && comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (field)), | |
5514 | TYPE_MAIN_VARIANT (TREE_TYPE (value)))) | |
3e4093b6 RS |
5515 | break; |
5516 | ||
5517 | if (field) | |
400fbf9f | 5518 | { |
3e4093b6 | 5519 | tree t; |
e616f54d | 5520 | bool maybe_const = true; |
3e4093b6 | 5521 | |
c1771a20 | 5522 | pedwarn (loc, OPT_Wpedantic, "ISO C forbids casts to union type"); |
e616f54d JM |
5523 | t = c_fully_fold (value, false, &maybe_const); |
5524 | t = build_constructor_single (type, field, t); | |
5525 | if (!maybe_const) | |
5526 | t = c_wrap_maybe_const (t, true); | |
5527 | t = digest_init (loc, type, t, | |
bbbbb16a | 5528 | NULL_TREE, false, true, 0); |
3e4093b6 RS |
5529 | TREE_CONSTANT (t) = TREE_CONSTANT (value); |
5530 | return t; | |
400fbf9f | 5531 | } |
c2255bc4 | 5532 | error_at (loc, "cast to union type from type not present in union"); |
3e4093b6 RS |
5533 | return error_mark_node; |
5534 | } | |
5535 | else | |
5536 | { | |
5537 | tree otype, ovalue; | |
400fbf9f | 5538 | |
3e4093b6 | 5539 | if (type == void_type_node) |
c2255bc4 AH |
5540 | { |
5541 | tree t = build1 (CONVERT_EXPR, type, value); | |
5542 | SET_EXPR_LOCATION (t, loc); | |
5543 | return t; | |
5544 | } | |
400fbf9f | 5545 | |
3e4093b6 | 5546 | otype = TREE_TYPE (value); |
400fbf9f | 5547 | |
3e4093b6 | 5548 | /* Optionally warn about potentially worrisome casts. */ |
3e4093b6 RS |
5549 | if (warn_cast_qual |
5550 | && TREE_CODE (type) == POINTER_TYPE | |
5551 | && TREE_CODE (otype) == POINTER_TYPE) | |
2ee3cb35 | 5552 | handle_warn_cast_qual (loc, type, otype); |
400fbf9f | 5553 | |
36c5e70a BE |
5554 | /* Warn about conversions between pointers to disjoint |
5555 | address spaces. */ | |
5556 | if (TREE_CODE (type) == POINTER_TYPE | |
5557 | && TREE_CODE (otype) == POINTER_TYPE | |
5558 | && !null_pointer_constant_p (value)) | |
5559 | { | |
5560 | addr_space_t as_to = TYPE_ADDR_SPACE (TREE_TYPE (type)); | |
5561 | addr_space_t as_from = TYPE_ADDR_SPACE (TREE_TYPE (otype)); | |
5562 | addr_space_t as_common; | |
5563 | ||
5564 | if (!addr_space_superset (as_to, as_from, &as_common)) | |
5565 | { | |
5566 | if (ADDR_SPACE_GENERIC_P (as_from)) | |
5567 | warning_at (loc, 0, "cast to %s address space pointer " | |
5568 | "from disjoint generic address space pointer", | |
5569 | c_addr_space_name (as_to)); | |
5570 | ||
5571 | else if (ADDR_SPACE_GENERIC_P (as_to)) | |
5572 | warning_at (loc, 0, "cast to generic address space pointer " | |
5573 | "from disjoint %s address space pointer", | |
5574 | c_addr_space_name (as_from)); | |
5575 | ||
5576 | else | |
5577 | warning_at (loc, 0, "cast to %s address space pointer " | |
5578 | "from disjoint %s address space pointer", | |
5579 | c_addr_space_name (as_to), | |
5580 | c_addr_space_name (as_from)); | |
5581 | } | |
5582 | } | |
5583 | ||
3e4093b6 | 5584 | /* Warn about possible alignment problems. */ |
1d933576 | 5585 | if ((STRICT_ALIGNMENT || warn_cast_align == 2) |
3e4093b6 RS |
5586 | && TREE_CODE (type) == POINTER_TYPE |
5587 | && TREE_CODE (otype) == POINTER_TYPE | |
5588 | && TREE_CODE (TREE_TYPE (otype)) != VOID_TYPE | |
5589 | && TREE_CODE (TREE_TYPE (otype)) != FUNCTION_TYPE | |
5590 | /* Don't warn about opaque types, where the actual alignment | |
5591 | restriction is unknown. */ | |
3e636daf | 5592 | && !(RECORD_OR_UNION_TYPE_P (TREE_TYPE (otype)) |
3e4093b6 | 5593 | && TYPE_MODE (TREE_TYPE (otype)) == VOIDmode) |
1d933576 BE |
5594 | && min_align_of_type (TREE_TYPE (type)) |
5595 | > min_align_of_type (TREE_TYPE (otype))) | |
c2255bc4 AH |
5596 | warning_at (loc, OPT_Wcast_align, |
5597 | "cast increases required alignment of target type"); | |
e9a25f70 | 5598 | |
3176a0c2 | 5599 | if (TREE_CODE (type) == INTEGER_TYPE |
3e4093b6 | 5600 | && TREE_CODE (otype) == POINTER_TYPE |
8d1c7aef | 5601 | && TYPE_PRECISION (type) != TYPE_PRECISION (otype)) |
c22cacf3 MS |
5602 | /* Unlike conversion of integers to pointers, where the |
5603 | warning is disabled for converting constants because | |
5604 | of cases such as SIG_*, warn about converting constant | |
5605 | pointers to integers. In some cases it may cause unwanted | |
8d1c7aef | 5606 | sign extension, and a warning is appropriate. */ |
c2255bc4 AH |
5607 | warning_at (loc, OPT_Wpointer_to_int_cast, |
5608 | "cast from pointer to integer of different size"); | |
400fbf9f | 5609 | |
3176a0c2 | 5610 | if (TREE_CODE (value) == CALL_EXPR |
3e4093b6 | 5611 | && TREE_CODE (type) != TREE_CODE (otype)) |
c2255bc4 AH |
5612 | warning_at (loc, OPT_Wbad_function_cast, |
5613 | "cast from function call of type %qT " | |
5614 | "to non-matching type %qT", otype, type); | |
400fbf9f | 5615 | |
3176a0c2 | 5616 | if (TREE_CODE (type) == POINTER_TYPE |
3e4093b6 RS |
5617 | && TREE_CODE (otype) == INTEGER_TYPE |
5618 | && TYPE_PRECISION (type) != TYPE_PRECISION (otype) | |
5619 | /* Don't warn about converting any constant. */ | |
5620 | && !TREE_CONSTANT (value)) | |
c2255bc4 AH |
5621 | warning_at (loc, |
5622 | OPT_Wint_to_pointer_cast, "cast to pointer from integer " | |
5623 | "of different size"); | |
400fbf9f | 5624 | |
79bedddc SR |
5625 | if (warn_strict_aliasing <= 2) |
5626 | strict_aliasing_warning (otype, type, expr); | |
400fbf9f | 5627 | |
3897f229 JM |
5628 | /* If pedantic, warn for conversions between function and object |
5629 | pointer types, except for converting a null pointer constant | |
5630 | to function pointer type. */ | |
5631 | if (pedantic | |
5632 | && TREE_CODE (type) == POINTER_TYPE | |
5633 | && TREE_CODE (otype) == POINTER_TYPE | |
5634 | && TREE_CODE (TREE_TYPE (otype)) == FUNCTION_TYPE | |
5635 | && TREE_CODE (TREE_TYPE (type)) != FUNCTION_TYPE) | |
c1771a20 | 5636 | pedwarn (loc, OPT_Wpedantic, "ISO C forbids " |
fcf73884 | 5637 | "conversion of function pointer to object pointer type"); |
3897f229 JM |
5638 | |
5639 | if (pedantic | |
5640 | && TREE_CODE (type) == POINTER_TYPE | |
5641 | && TREE_CODE (otype) == POINTER_TYPE | |
5642 | && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE | |
5643 | && TREE_CODE (TREE_TYPE (otype)) != FUNCTION_TYPE | |
6aa3c60d | 5644 | && !null_pointer_constant_p (value)) |
c1771a20 | 5645 | pedwarn (loc, OPT_Wpedantic, "ISO C forbids " |
fcf73884 | 5646 | "conversion of object pointer to function pointer type"); |
3897f229 | 5647 | |
3e4093b6 | 5648 | ovalue = value; |
3e4093b6 | 5649 | value = convert (type, value); |
400fbf9f | 5650 | |
3e4093b6 | 5651 | /* Ignore any integer overflow caused by the cast. */ |
928c19bb | 5652 | if (TREE_CODE (value) == INTEGER_CST && !FLOAT_TYPE_P (otype)) |
3e4093b6 | 5653 | { |
8bcd6380 | 5654 | if (CONSTANT_CLASS_P (ovalue) && TREE_OVERFLOW (ovalue)) |
6414bad6 | 5655 | { |
8bcd6380 RS |
5656 | if (!TREE_OVERFLOW (value)) |
5657 | { | |
5658 | /* Avoid clobbering a shared constant. */ | |
5659 | value = copy_node (value); | |
5660 | TREE_OVERFLOW (value) = TREE_OVERFLOW (ovalue); | |
5661 | } | |
6414bad6 | 5662 | } |
8bcd6380 | 5663 | else if (TREE_OVERFLOW (value)) |
d8e1f97b | 5664 | /* Reset VALUE's overflow flags, ensuring constant sharing. */ |
8e6cdc90 | 5665 | value = wide_int_to_tree (TREE_TYPE (value), wi::to_wide (value)); |
3e4093b6 RS |
5666 | } |
5667 | } | |
400fbf9f | 5668 | |
53cd18ec | 5669 | /* Don't let a cast be an lvalue. */ |
9482b620 | 5670 | if (lvalue_p (value)) |
db3927fb | 5671 | value = non_lvalue_loc (loc, value); |
e9a25f70 | 5672 | |
928c19bb JM |
5673 | /* Don't allow the results of casting to floating-point or complex |
5674 | types be confused with actual constants, or casts involving | |
5675 | integer and pointer types other than direct integer-to-integer | |
5676 | and integer-to-pointer be confused with integer constant | |
5677 | expressions and null pointer constants. */ | |
5678 | if (TREE_CODE (value) == REAL_CST | |
5679 | || TREE_CODE (value) == COMPLEX_CST | |
5680 | || (TREE_CODE (value) == INTEGER_CST | |
5681 | && !((TREE_CODE (expr) == INTEGER_CST | |
5682 | && INTEGRAL_TYPE_P (TREE_TYPE (expr))) | |
5683 | || TREE_CODE (expr) == REAL_CST | |
5684 | || TREE_CODE (expr) == COMPLEX_CST))) | |
5685 | value = build1 (NOP_EXPR, type, value); | |
5686 | ||
21ba0cea | 5687 | protected_set_expr_location (value, loc); |
3e4093b6 | 5688 | return value; |
400fbf9f JW |
5689 | } |
5690 | ||
c2255bc4 AH |
5691 | /* Interpret a cast of expression EXPR to type TYPE. LOC is the |
5692 | location of the open paren of the cast, or the position of the cast | |
5693 | expr. */ | |
3e4093b6 | 5694 | tree |
c2255bc4 | 5695 | c_cast_expr (location_t loc, struct c_type_name *type_name, tree expr) |
400fbf9f | 5696 | { |
f8893e47 | 5697 | tree type; |
928c19bb JM |
5698 | tree type_expr = NULL_TREE; |
5699 | bool type_expr_const = true; | |
5700 | tree ret; | |
3e4093b6 | 5701 | int saved_wsp = warn_strict_prototypes; |
c5c76735 | 5702 | |
3e4093b6 RS |
5703 | /* This avoids warnings about unprototyped casts on |
5704 | integers. E.g. "#define SIG_DFL (void(*)())0". */ | |
5705 | if (TREE_CODE (expr) == INTEGER_CST) | |
5706 | warn_strict_prototypes = 0; | |
928c19bb | 5707 | type = groktypename (type_name, &type_expr, &type_expr_const); |
3e4093b6 | 5708 | warn_strict_prototypes = saved_wsp; |
c5c76735 | 5709 | |
1807ffc1 MS |
5710 | if (TREE_CODE (expr) == ADDR_EXPR && !VOID_TYPE_P (type) |
5711 | && reject_gcc_builtin (expr)) | |
5712 | return error_mark_node; | |
5713 | ||
c2255bc4 | 5714 | ret = build_c_cast (loc, type, expr); |
928c19bb JM |
5715 | if (type_expr) |
5716 | { | |
9f33203d JM |
5717 | bool inner_expr_const = true; |
5718 | ret = c_fully_fold (ret, require_constant_value, &inner_expr_const); | |
928c19bb | 5719 | ret = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (ret), type_expr, ret); |
9f33203d JM |
5720 | C_MAYBE_CONST_EXPR_NON_CONST (ret) = !(type_expr_const |
5721 | && inner_expr_const); | |
c2255bc4 | 5722 | SET_EXPR_LOCATION (ret, loc); |
928c19bb | 5723 | } |
24b97832 | 5724 | |
21ba0cea MP |
5725 | if (!EXPR_HAS_LOCATION (ret)) |
5726 | protected_set_expr_location (ret, loc); | |
24b97832 | 5727 | |
9e5b2115 PB |
5728 | /* C++ does not permits types to be defined in a cast, but it |
5729 | allows references to incomplete types. */ | |
5730 | if (warn_cxx_compat && type_name->specs->typespec_kind == ctsk_tagdef) | |
24b97832 ILT |
5731 | warning_at (loc, OPT_Wc___compat, |
5732 | "defining a type in a cast is invalid in C++"); | |
5733 | ||
928c19bb | 5734 | return ret; |
400fbf9f | 5735 | } |
3e4093b6 RS |
5736 | \f |
5737 | /* Build an assignment expression of lvalue LHS from value RHS. | |
32e8bb8e ILT |
5738 | If LHS_ORIGTYPE is not NULL, it is the original type of LHS, which |
5739 | may differ from TREE_TYPE (LHS) for an enum bitfield. | |
3e4093b6 RS |
5740 | MODIFYCODE is the code for a binary operator that we use |
5741 | to combine the old value of LHS with RHS to get the new value. | |
c9f9eb5d | 5742 | Or else MODIFYCODE is NOP_EXPR meaning do a simple assignment. |
bbbbb16a ILT |
5743 | If RHS_ORIGTYPE is not NULL_TREE, it is the original type of RHS, |
5744 | which may differ from TREE_TYPE (RHS) for an enum value. | |
c9f9eb5d | 5745 | |
c2255bc4 AH |
5746 | LOCATION is the location of the MODIFYCODE operator. |
5747 | RHS_LOC is the location of the RHS. */ | |
2f6e4e97 | 5748 | |
3e4093b6 | 5749 | tree |
32e8bb8e | 5750 | build_modify_expr (location_t location, tree lhs, tree lhs_origtype, |
b8698a0f | 5751 | enum tree_code modifycode, |
c2255bc4 | 5752 | location_t rhs_loc, tree rhs, tree rhs_origtype) |
400fbf9f | 5753 | { |
3e4093b6 RS |
5754 | tree result; |
5755 | tree newrhs; | |
241f845a | 5756 | tree rhseval = NULL_TREE; |
3e4093b6 RS |
5757 | tree lhstype = TREE_TYPE (lhs); |
5758 | tree olhstype = lhstype; | |
928c19bb | 5759 | bool npc; |
267bac10 | 5760 | bool is_atomic_op; |
e9a25f70 | 5761 | |
3e4093b6 | 5762 | /* Types that aren't fully specified cannot be used in assignments. */ |
4f2e1536 | 5763 | lhs = require_complete_type (location, lhs); |
e9a25f70 | 5764 | |
3e4093b6 RS |
5765 | /* Avoid duplicate error messages from operands that had errors. */ |
5766 | if (TREE_CODE (lhs) == ERROR_MARK || TREE_CODE (rhs) == ERROR_MARK) | |
5767 | return error_mark_node; | |
400fbf9f | 5768 | |
4c2ecab0 JM |
5769 | /* Ensure an error for assigning a non-lvalue array to an array in |
5770 | C90. */ | |
5771 | if (TREE_CODE (lhstype) == ARRAY_TYPE) | |
5772 | { | |
5773 | error_at (location, "assignment to expression with array type"); | |
5774 | return error_mark_node; | |
5775 | } | |
5776 | ||
46a88c12 | 5777 | /* For ObjC properties, defer this check. */ |
7bd11157 | 5778 | if (!objc_is_property_ref (lhs) && !lvalue_or_else (location, lhs, lv_assign)) |
c0bcacec VR |
5779 | return error_mark_node; |
5780 | ||
267bac10 JM |
5781 | is_atomic_op = really_atomic_lvalue (lhs); |
5782 | ||
3e4093b6 | 5783 | newrhs = rhs; |
400fbf9f | 5784 | |
928c19bb JM |
5785 | if (TREE_CODE (lhs) == C_MAYBE_CONST_EXPR) |
5786 | { | |
5787 | tree inner = build_modify_expr (location, C_MAYBE_CONST_EXPR_EXPR (lhs), | |
c2255bc4 | 5788 | lhs_origtype, modifycode, rhs_loc, rhs, |
32e8bb8e | 5789 | rhs_origtype); |
928c19bb JM |
5790 | if (inner == error_mark_node) |
5791 | return error_mark_node; | |
5792 | result = build2 (C_MAYBE_CONST_EXPR, TREE_TYPE (inner), | |
5793 | C_MAYBE_CONST_EXPR_PRE (lhs), inner); | |
5794 | gcc_assert (!C_MAYBE_CONST_EXPR_INT_OPERANDS (lhs)); | |
5795 | C_MAYBE_CONST_EXPR_NON_CONST (result) = 1; | |
5796 | protected_set_expr_location (result, location); | |
5797 | return result; | |
5798 | } | |
5799 | ||
3e4093b6 RS |
5800 | /* If a binary op has been requested, combine the old LHS value with the RHS |
5801 | producing the value we should actually store into the LHS. */ | |
5802 | ||
5803 | if (modifycode != NOP_EXPR) | |
400fbf9f | 5804 | { |
f9c59f7e | 5805 | lhs = c_fully_fold (lhs, false, NULL, true); |
3e4093b6 | 5806 | lhs = stabilize_reference (lhs); |
bbbbb16a | 5807 | |
267bac10 JM |
5808 | /* Construct the RHS for any non-atomic compound assignemnt. */ |
5809 | if (!is_atomic_op) | |
5810 | { | |
241f845a JJ |
5811 | /* If in LHS op= RHS the RHS has side-effects, ensure they |
5812 | are preevaluated before the rest of the assignment expression's | |
5813 | side-effects, because RHS could contain e.g. function calls | |
5814 | that modify LHS. */ | |
5815 | if (TREE_SIDE_EFFECTS (rhs)) | |
5816 | { | |
e035be33 JM |
5817 | if (TREE_CODE (rhs) == EXCESS_PRECISION_EXPR) |
5818 | newrhs = save_expr (TREE_OPERAND (rhs, 0)); | |
5819 | else | |
5820 | newrhs = save_expr (rhs); | |
241f845a | 5821 | rhseval = newrhs; |
e035be33 JM |
5822 | if (TREE_CODE (rhs) == EXCESS_PRECISION_EXPR) |
5823 | newrhs = build1 (EXCESS_PRECISION_EXPR, TREE_TYPE (rhs), | |
5824 | newrhs); | |
241f845a | 5825 | } |
267bac10 | 5826 | newrhs = build_binary_op (location, |
30af3a2b | 5827 | modifycode, lhs, newrhs, true); |
267bac10 JM |
5828 | |
5829 | /* The original type of the right hand side is no longer | |
5830 | meaningful. */ | |
5831 | rhs_origtype = NULL_TREE; | |
5832 | } | |
400fbf9f | 5833 | } |
400fbf9f | 5834 | |
668ea4b1 IS |
5835 | if (c_dialect_objc ()) |
5836 | { | |
46a88c12 NP |
5837 | /* Check if we are modifying an Objective-C property reference; |
5838 | if so, we need to generate setter calls. */ | |
e035be33 JM |
5839 | if (TREE_CODE (newrhs) == EXCESS_PRECISION_EXPR) |
5840 | result = objc_maybe_build_modify_expr (lhs, TREE_OPERAND (newrhs, 0)); | |
5841 | else | |
5842 | result = objc_maybe_build_modify_expr (lhs, newrhs); | |
668ea4b1 | 5843 | if (result) |
241f845a | 5844 | goto return_result; |
46a88c12 NP |
5845 | |
5846 | /* Else, do the check that we postponed for Objective-C. */ | |
7bd11157 | 5847 | if (!lvalue_or_else (location, lhs, lv_assign)) |
668ea4b1 IS |
5848 | return error_mark_node; |
5849 | } | |
5850 | ||
9bf24266 | 5851 | /* Give an error for storing in something that is 'const'. */ |
bbbd6700 | 5852 | |
f37acdf9 | 5853 | if (TYPE_READONLY (lhstype) |
3e636daf | 5854 | || (RECORD_OR_UNION_TYPE_P (lhstype) |
3e4093b6 | 5855 | && C_TYPE_FIELDS_READONLY (lhstype))) |
953ff289 | 5856 | { |
c02065fc | 5857 | readonly_error (location, lhs, lv_assign); |
953ff289 DN |
5858 | return error_mark_node; |
5859 | } | |
f37acdf9 JM |
5860 | else if (TREE_READONLY (lhs)) |
5861 | readonly_warning (lhs, lv_assign); | |
bbbd6700 | 5862 | |
3e4093b6 RS |
5863 | /* If storing into a structure or union member, |
5864 | it has probably been given type `int'. | |
5865 | Compute the type that would go with | |
5866 | the actual amount of storage the member occupies. */ | |
bbbd6700 | 5867 | |
3e4093b6 RS |
5868 | if (TREE_CODE (lhs) == COMPONENT_REF |
5869 | && (TREE_CODE (lhstype) == INTEGER_TYPE | |
5870 | || TREE_CODE (lhstype) == BOOLEAN_TYPE | |
5871 | || TREE_CODE (lhstype) == REAL_TYPE | |
5872 | || TREE_CODE (lhstype) == ENUMERAL_TYPE)) | |
5873 | lhstype = TREE_TYPE (get_unwidened (lhs, 0)); | |
400fbf9f | 5874 | |
3e4093b6 RS |
5875 | /* If storing in a field that is in actuality a short or narrower than one, |
5876 | we must store in the field in its actual type. */ | |
5877 | ||
5878 | if (lhstype != TREE_TYPE (lhs)) | |
5879 | { | |
5880 | lhs = copy_node (lhs); | |
5881 | TREE_TYPE (lhs) = lhstype; | |
400fbf9f | 5882 | } |
400fbf9f | 5883 | |
32e8bb8e ILT |
5884 | /* Issue -Wc++-compat warnings about an assignment to an enum type |
5885 | when LHS does not have its original type. This happens for, | |
5886 | e.g., an enum bitfield in a struct. */ | |
5887 | if (warn_cxx_compat | |
5888 | && lhs_origtype != NULL_TREE | |
5889 | && lhs_origtype != lhstype | |
5890 | && TREE_CODE (lhs_origtype) == ENUMERAL_TYPE) | |
5891 | { | |
5892 | tree checktype = (rhs_origtype != NULL_TREE | |
5893 | ? rhs_origtype | |
5894 | : TREE_TYPE (rhs)); | |
5895 | if (checktype != error_mark_node | |
267bac10 JM |
5896 | && (TYPE_MAIN_VARIANT (checktype) != TYPE_MAIN_VARIANT (lhs_origtype) |
5897 | || (is_atomic_op && modifycode != NOP_EXPR))) | |
32e8bb8e ILT |
5898 | warning_at (location, OPT_Wc___compat, |
5899 | "enum conversion in assignment is invalid in C++"); | |
5900 | } | |
5901 | ||
267bac10 JM |
5902 | /* If the lhs is atomic, remove that qualifier. */ |
5903 | if (is_atomic_op) | |
5904 | { | |
5905 | lhstype = build_qualified_type (lhstype, | |
5906 | (TYPE_QUALS (lhstype) | |
5907 | & ~TYPE_QUAL_ATOMIC)); | |
5908 | olhstype = build_qualified_type (olhstype, | |
5909 | (TYPE_QUALS (lhstype) | |
5910 | & ~TYPE_QUAL_ATOMIC)); | |
5911 | } | |
5912 | ||
8ce94e44 JM |
5913 | /* Convert new value to destination type. Fold it first, then |
5914 | restore any excess precision information, for the sake of | |
5915 | conversion warnings. */ | |
400fbf9f | 5916 | |
267bac10 JM |
5917 | if (!(is_atomic_op && modifycode != NOP_EXPR)) |
5918 | { | |
e035be33 JM |
5919 | tree rhs_semantic_type = NULL_TREE; |
5920 | if (TREE_CODE (newrhs) == EXCESS_PRECISION_EXPR) | |
5921 | { | |
5922 | rhs_semantic_type = TREE_TYPE (newrhs); | |
5923 | newrhs = TREE_OPERAND (newrhs, 0); | |
5924 | } | |
267bac10 JM |
5925 | npc = null_pointer_constant_p (newrhs); |
5926 | newrhs = c_fully_fold (newrhs, false, NULL); | |
5927 | if (rhs_semantic_type) | |
5928 | newrhs = build1 (EXCESS_PRECISION_EXPR, rhs_semantic_type, newrhs); | |
68fca595 MP |
5929 | newrhs = convert_for_assignment (location, rhs_loc, lhstype, newrhs, |
5930 | rhs_origtype, ic_assign, npc, | |
5931 | NULL_TREE, NULL_TREE, 0); | |
267bac10 JM |
5932 | if (TREE_CODE (newrhs) == ERROR_MARK) |
5933 | return error_mark_node; | |
5934 | } | |
400fbf9f | 5935 | |
6e955430 ZL |
5936 | /* Emit ObjC write barrier, if necessary. */ |
5937 | if (c_dialect_objc () && flag_objc_gc) | |
5938 | { | |
5939 | result = objc_generate_write_barrier (lhs, modifycode, newrhs); | |
5940 | if (result) | |
c9f9eb5d AH |
5941 | { |
5942 | protected_set_expr_location (result, location); | |
241f845a | 5943 | goto return_result; |
c9f9eb5d | 5944 | } |
6e955430 ZL |
5945 | } |
5946 | ||
ea4b7848 | 5947 | /* Scan operands. */ |
400fbf9f | 5948 | |
267bac10 JM |
5949 | if (is_atomic_op) |
5950 | result = build_atomic_assign (location, lhs, modifycode, newrhs, false); | |
5951 | else | |
5952 | { | |
5953 | result = build2 (MODIFY_EXPR, lhstype, lhs, newrhs); | |
5954 | TREE_SIDE_EFFECTS (result) = 1; | |
5955 | protected_set_expr_location (result, location); | |
5956 | } | |
400fbf9f | 5957 | |
3e4093b6 RS |
5958 | /* If we got the LHS in a different type for storing in, |
5959 | convert the result back to the nominal type of LHS | |
5960 | so that the value we return always has the same type | |
5961 | as the LHS argument. */ | |
e855c5ce | 5962 | |
3e4093b6 | 5963 | if (olhstype == TREE_TYPE (result)) |
241f845a | 5964 | goto return_result; |
c9f9eb5d | 5965 | |
68fca595 MP |
5966 | result = convert_for_assignment (location, rhs_loc, olhstype, result, |
5967 | rhs_origtype, ic_assign, false, NULL_TREE, | |
5968 | NULL_TREE, 0); | |
c9f9eb5d | 5969 | protected_set_expr_location (result, location); |
241f845a JJ |
5970 | |
5971 | return_result: | |
5972 | if (rhseval) | |
5973 | result = build2 (COMPOUND_EXPR, TREE_TYPE (result), rhseval, result); | |
c9f9eb5d | 5974 | return result; |
3e4093b6 RS |
5975 | } |
5976 | \f | |
478a1c5b ILT |
5977 | /* Return whether STRUCT_TYPE has an anonymous field with type TYPE. |
5978 | This is used to implement -fplan9-extensions. */ | |
5979 | ||
5980 | static bool | |
5981 | find_anonymous_field_with_type (tree struct_type, tree type) | |
5982 | { | |
5983 | tree field; | |
5984 | bool found; | |
5985 | ||
3e636daf | 5986 | gcc_assert (RECORD_OR_UNION_TYPE_P (struct_type)); |
478a1c5b ILT |
5987 | found = false; |
5988 | for (field = TYPE_FIELDS (struct_type); | |
5989 | field != NULL_TREE; | |
5990 | field = TREE_CHAIN (field)) | |
5991 | { | |
267bac10 JM |
5992 | tree fieldtype = (TYPE_ATOMIC (TREE_TYPE (field)) |
5993 | ? c_build_qualified_type (TREE_TYPE (field), | |
5994 | TYPE_QUAL_ATOMIC) | |
5995 | : TYPE_MAIN_VARIANT (TREE_TYPE (field))); | |
478a1c5b | 5996 | if (DECL_NAME (field) == NULL |
267bac10 | 5997 | && comptypes (type, fieldtype)) |
478a1c5b ILT |
5998 | { |
5999 | if (found) | |
6000 | return false; | |
6001 | found = true; | |
6002 | } | |
6003 | else if (DECL_NAME (field) == NULL | |
3e636daf | 6004 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (field)) |
478a1c5b ILT |
6005 | && find_anonymous_field_with_type (TREE_TYPE (field), type)) |
6006 | { | |
6007 | if (found) | |
6008 | return false; | |
6009 | found = true; | |
6010 | } | |
6011 | } | |
6012 | return found; | |
6013 | } | |
6014 | ||
6015 | /* RHS is an expression whose type is pointer to struct. If there is | |
6016 | an anonymous field in RHS with type TYPE, then return a pointer to | |
6017 | that field in RHS. This is used with -fplan9-extensions. This | |
6018 | returns NULL if no conversion could be found. */ | |
6019 | ||
6020 | static tree | |
6021 | convert_to_anonymous_field (location_t location, tree type, tree rhs) | |
6022 | { | |
6023 | tree rhs_struct_type, lhs_main_type; | |
6024 | tree field, found_field; | |
6025 | bool found_sub_field; | |
6026 | tree ret; | |
6027 | ||
6028 | gcc_assert (POINTER_TYPE_P (TREE_TYPE (rhs))); | |
6029 | rhs_struct_type = TREE_TYPE (TREE_TYPE (rhs)); | |
3e636daf | 6030 | gcc_assert (RECORD_OR_UNION_TYPE_P (rhs_struct_type)); |
478a1c5b ILT |
6031 | |
6032 | gcc_assert (POINTER_TYPE_P (type)); | |
267bac10 JM |
6033 | lhs_main_type = (TYPE_ATOMIC (TREE_TYPE (type)) |
6034 | ? c_build_qualified_type (TREE_TYPE (type), | |
6035 | TYPE_QUAL_ATOMIC) | |
6036 | : TYPE_MAIN_VARIANT (TREE_TYPE (type))); | |
478a1c5b ILT |
6037 | |
6038 | found_field = NULL_TREE; | |
6039 | found_sub_field = false; | |
6040 | for (field = TYPE_FIELDS (rhs_struct_type); | |
6041 | field != NULL_TREE; | |
6042 | field = TREE_CHAIN (field)) | |
6043 | { | |
6044 | if (DECL_NAME (field) != NULL_TREE | |
3e636daf | 6045 | || !RECORD_OR_UNION_TYPE_P (TREE_TYPE (field))) |
478a1c5b | 6046 | continue; |
267bac10 JM |
6047 | tree fieldtype = (TYPE_ATOMIC (TREE_TYPE (field)) |
6048 | ? c_build_qualified_type (TREE_TYPE (field), | |
6049 | TYPE_QUAL_ATOMIC) | |
6050 | : TYPE_MAIN_VARIANT (TREE_TYPE (field))); | |
6051 | if (comptypes (lhs_main_type, fieldtype)) | |
478a1c5b ILT |
6052 | { |
6053 | if (found_field != NULL_TREE) | |
6054 | return NULL_TREE; | |
6055 | found_field = field; | |
6056 | } | |
6057 | else if (find_anonymous_field_with_type (TREE_TYPE (field), | |
6058 | lhs_main_type)) | |
6059 | { | |
6060 | if (found_field != NULL_TREE) | |
6061 | return NULL_TREE; | |
6062 | found_field = field; | |
6063 | found_sub_field = true; | |
6064 | } | |
6065 | } | |
6066 | ||
6067 | if (found_field == NULL_TREE) | |
6068 | return NULL_TREE; | |
6069 | ||
6070 | ret = fold_build3_loc (location, COMPONENT_REF, TREE_TYPE (found_field), | |
6071 | build_fold_indirect_ref (rhs), found_field, | |
6072 | NULL_TREE); | |
6073 | ret = build_fold_addr_expr_loc (location, ret); | |
6074 | ||
6075 | if (found_sub_field) | |
6076 | { | |
6077 | ret = convert_to_anonymous_field (location, type, ret); | |
6078 | gcc_assert (ret != NULL_TREE); | |
6079 | } | |
6080 | ||
6081 | return ret; | |
6082 | } | |
6083 | ||
63bc4e87 MP |
6084 | /* Issue an error message for a bad initializer component. |
6085 | GMSGID identifies the message. | |
6086 | The component name is taken from the spelling stack. */ | |
6087 | ||
6088 | static void | |
ea58ef42 | 6089 | error_init (location_t loc, const char *gmsgid) |
63bc4e87 MP |
6090 | { |
6091 | char *ofwhat; | |
6092 | ||
6093 | /* The gmsgid may be a format string with %< and %>. */ | |
ea58ef42 | 6094 | error_at (loc, gmsgid); |
63bc4e87 MP |
6095 | ofwhat = print_spelling ((char *) alloca (spelling_length () + 1)); |
6096 | if (*ofwhat) | |
d7ff7ae5 | 6097 | inform (loc, "(near initialization for %qs)", ofwhat); |
63bc4e87 MP |
6098 | } |
6099 | ||
6100 | /* Issue a pedantic warning for a bad initializer component. OPT is | |
6101 | the option OPT_* (from options.h) controlling this warning or 0 if | |
6102 | it is unconditionally given. GMSGID identifies the message. The | |
6103 | component name is taken from the spelling stack. */ | |
6104 | ||
296c53ac MP |
6105 | static void ATTRIBUTE_GCC_DIAG (3,0) |
6106 | pedwarn_init (location_t loc, int opt, const char *gmsgid, ...) | |
63bc4e87 | 6107 | { |
79063edd MS |
6108 | /* Use the location where a macro was expanded rather than where |
6109 | it was defined to make sure macros defined in system headers | |
6110 | but used incorrectly elsewhere are diagnosed. */ | |
6111 | source_location exploc = expansion_point_location_if_in_system_header (loc); | |
6112 | ||
296c53ac MP |
6113 | va_list ap; |
6114 | va_start (ap, gmsgid); | |
6115 | bool warned = emit_diagnostic_valist (DK_PEDWARN, exploc, opt, gmsgid, &ap); | |
6116 | va_end (ap); | |
6117 | char *ofwhat = print_spelling ((char *) alloca (spelling_length () + 1)); | |
d7ff7ae5 | 6118 | if (*ofwhat && warned) |
79063edd | 6119 | inform (exploc, "(near initialization for %qs)", ofwhat); |
63bc4e87 MP |
6120 | } |
6121 | ||
6122 | /* Issue a warning for a bad initializer component. | |
6123 | ||
6124 | OPT is the OPT_W* value corresponding to the warning option that | |
6125 | controls this warning. GMSGID identifies the message. The | |
6126 | component name is taken from the spelling stack. */ | |
6127 | ||
6128 | static void | |
6129 | warning_init (location_t loc, int opt, const char *gmsgid) | |
6130 | { | |
6131 | char *ofwhat; | |
d7ff7ae5 | 6132 | bool warned; |
63bc4e87 | 6133 | |
79063edd MS |
6134 | /* Use the location where a macro was expanded rather than where |
6135 | it was defined to make sure macros defined in system headers | |
6136 | but used incorrectly elsewhere are diagnosed. */ | |
6137 | source_location exploc = expansion_point_location_if_in_system_header (loc); | |
6138 | ||
63bc4e87 | 6139 | /* The gmsgid may be a format string with %< and %>. */ |
79063edd | 6140 | warned = warning_at (exploc, opt, gmsgid); |
63bc4e87 | 6141 | ofwhat = print_spelling ((char *) alloca (spelling_length () + 1)); |
d7ff7ae5 | 6142 | if (*ofwhat && warned) |
79063edd | 6143 | inform (exploc, "(near initialization for %qs)", ofwhat); |
63bc4e87 MP |
6144 | } |
6145 | \f | |
6146 | /* If TYPE is an array type and EXPR is a parenthesized string | |
6147 | constant, warn if pedantic that EXPR is being used to initialize an | |
6148 | object of type TYPE. */ | |
6149 | ||
6150 | void | |
d033409e | 6151 | maybe_warn_string_init (location_t loc, tree type, struct c_expr expr) |
63bc4e87 MP |
6152 | { |
6153 | if (pedantic | |
6154 | && TREE_CODE (type) == ARRAY_TYPE | |
6155 | && TREE_CODE (expr.value) == STRING_CST | |
6156 | && expr.original_code != STRING_CST) | |
d033409e | 6157 | pedwarn_init (loc, OPT_Wpedantic, |
63bc4e87 MP |
6158 | "array initialized from parenthesized string constant"); |
6159 | } | |
6160 | ||
8139a48e DM |
6161 | /* Attempt to locate the parameter with the given index within FNDECL, |
6162 | returning DECL_SOURCE_LOCATION (FNDECL) if it can't be found. */ | |
6163 | ||
6164 | static location_t | |
6165 | get_fndecl_argument_location (tree fndecl, int argnum) | |
6166 | { | |
6167 | int i; | |
6168 | tree param; | |
6169 | ||
6170 | /* Locate param by index within DECL_ARGUMENTS (fndecl). */ | |
6171 | for (i = 0, param = DECL_ARGUMENTS (fndecl); | |
6172 | i < argnum && param; | |
6173 | i++, param = TREE_CHAIN (param)) | |
6174 | ; | |
6175 | ||
6176 | /* If something went wrong (e.g. if we have a builtin and thus no arguments), | |
6177 | return DECL_SOURCE_LOCATION (FNDECL). */ | |
6178 | if (param == NULL) | |
6179 | return DECL_SOURCE_LOCATION (fndecl); | |
6180 | ||
6181 | return DECL_SOURCE_LOCATION (param); | |
6182 | } | |
6183 | ||
6184 | /* Issue a note about a mismatching argument for parameter PARMNUM | |
6185 | to FUNDECL, for types EXPECTED_TYPE and ACTUAL_TYPE. | |
6186 | Attempt to issue the note at the pertinent parameter of the decl; | |
6187 | failing that issue it at the location of FUNDECL; failing that | |
6188 | issue it at PLOC. */ | |
6189 | ||
6190 | static void | |
6191 | inform_for_arg (tree fundecl, location_t ploc, int parmnum, | |
6192 | tree expected_type, tree actual_type) | |
6193 | { | |
6194 | location_t loc; | |
6195 | if (fundecl && !DECL_IS_BUILTIN (fundecl)) | |
6196 | loc = get_fndecl_argument_location (fundecl, parmnum - 1); | |
6197 | else | |
6198 | loc = ploc; | |
6199 | ||
6200 | inform (loc, | |
6201 | "expected %qT but argument is of type %qT", | |
6202 | expected_type, actual_type); | |
6203 | } | |
6204 | ||
bbbbb16a ILT |
6205 | /* Convert value RHS to type TYPE as preparation for an assignment to |
6206 | an lvalue of type TYPE. If ORIGTYPE is not NULL_TREE, it is the | |
6207 | original type of RHS; this differs from TREE_TYPE (RHS) for enum | |
6208 | types. NULL_POINTER_CONSTANT says whether RHS was a null pointer | |
6209 | constant before any folding. | |
3e4093b6 RS |
6210 | The real work of conversion is done by `convert'. |
6211 | The purpose of this function is to generate error messages | |
6212 | for assignments that are not allowed in C. | |
2ac2f164 JM |
6213 | ERRTYPE says whether it is argument passing, assignment, |
6214 | initialization or return. | |
2f6e4e97 | 6215 | |
aabef2de MP |
6216 | In the following example, '~' denotes where EXPR_LOC and '^' where |
6217 | LOCATION point to: | |
6218 | ||
6219 | f (var); [ic_argpass] | |
6220 | ^ ~~~ | |
6221 | x = var; [ic_assign] | |
6222 | ^ ~~~; | |
6223 | int x = var; [ic_init] | |
6224 | ^^^ | |
6225 | return x; [ic_return] | |
6226 | ^ | |
6227 | ||
2ac2f164 | 6228 | FUNCTION is a tree for the function being called. |
3e4093b6 | 6229 | PARMNUM is the number of the argument, for printing in error messages. */ |
cb3ca04e | 6230 | |
3e4093b6 | 6231 | static tree |
81e5eca8 | 6232 | convert_for_assignment (location_t location, location_t expr_loc, tree type, |
68fca595 | 6233 | tree rhs, tree origtype, enum impl_conv errtype, |
744aa42f ILT |
6234 | bool null_pointer_constant, tree fundecl, |
6235 | tree function, int parmnum) | |
3e4093b6 RS |
6236 | { |
6237 | enum tree_code codel = TREE_CODE (type); | |
8ce94e44 | 6238 | tree orig_rhs = rhs; |
3e4093b6 RS |
6239 | tree rhstype; |
6240 | enum tree_code coder; | |
2ac2f164 | 6241 | tree rname = NULL_TREE; |
58393038 | 6242 | bool objc_ok = false; |
2ac2f164 | 6243 | |
1c7485af MP |
6244 | /* Use the expansion point location to handle cases such as user's |
6245 | function returning a wrong-type macro defined in a system header. */ | |
6246 | location = expansion_point_location_if_in_system_header (location); | |
6247 | ||
6b4ef5c1 | 6248 | if (errtype == ic_argpass) |
2ac2f164 JM |
6249 | { |
6250 | tree selector; | |
6251 | /* Change pointer to function to the function itself for | |
6252 | diagnostics. */ | |
6253 | if (TREE_CODE (function) == ADDR_EXPR | |
6254 | && TREE_CODE (TREE_OPERAND (function, 0)) == FUNCTION_DECL) | |
6255 | function = TREE_OPERAND (function, 0); | |
6256 | ||
6257 | /* Handle an ObjC selector specially for diagnostics. */ | |
6258 | selector = objc_message_selector (); | |
6259 | rname = function; | |
6260 | if (selector && parmnum > 2) | |
6261 | { | |
6262 | rname = selector; | |
6263 | parmnum -= 2; | |
6264 | } | |
6265 | } | |
6266 | ||
6267 | /* This macro is used to emit diagnostics to ensure that all format | |
6268 | strings are complete sentences, visible to gettext and checked at | |
6269 | compile time. */ | |
768952be | 6270 | #define PEDWARN_FOR_ASSIGNMENT(LOCATION, PLOC, OPT, AR, AS, IN, RE) \ |
1e053dfe MLI |
6271 | do { \ |
6272 | switch (errtype) \ | |
6273 | { \ | |
6274 | case ic_argpass: \ | |
5c1bc275 | 6275 | if (pedwarn (PLOC, OPT, AR, parmnum, rname)) \ |
8139a48e | 6276 | inform_for_arg (fundecl, (PLOC), parmnum, type, rhstype); \ |
1e053dfe | 6277 | break; \ |
1e053dfe MLI |
6278 | case ic_assign: \ |
6279 | pedwarn (LOCATION, OPT, AS); \ | |
6280 | break; \ | |
6281 | case ic_init: \ | |
6a8f4e12 | 6282 | pedwarn_init (LOCATION, OPT, IN); \ |
1e053dfe MLI |
6283 | break; \ |
6284 | case ic_return: \ | |
d033409e | 6285 | pedwarn (LOCATION, OPT, RE); \ |
1e053dfe MLI |
6286 | break; \ |
6287 | default: \ | |
6288 | gcc_unreachable (); \ | |
6289 | } \ | |
2ac2f164 | 6290 | } while (0) |
cb3ca04e | 6291 | |
49706e39 MLI |
6292 | /* This macro is used to emit diagnostics to ensure that all format |
6293 | strings are complete sentences, visible to gettext and checked at | |
768952be | 6294 | compile time. It is the same as PEDWARN_FOR_ASSIGNMENT but with an |
49706e39 | 6295 | extra parameter to enumerate qualifiers. */ |
768952be | 6296 | #define PEDWARN_FOR_QUALIFIERS(LOCATION, PLOC, OPT, AR, AS, IN, RE, QUALS) \ |
49706e39 MLI |
6297 | do { \ |
6298 | switch (errtype) \ | |
6299 | { \ | |
6300 | case ic_argpass: \ | |
5c1bc275 | 6301 | if (pedwarn (PLOC, OPT, AR, parmnum, rname, QUALS)) \ |
8139a48e | 6302 | inform_for_arg (fundecl, (PLOC), parmnum, type, rhstype); \ |
49706e39 MLI |
6303 | break; \ |
6304 | case ic_assign: \ | |
5c1bc275 | 6305 | pedwarn (LOCATION, OPT, AS, QUALS); \ |
49706e39 MLI |
6306 | break; \ |
6307 | case ic_init: \ | |
5c1bc275 | 6308 | pedwarn (LOCATION, OPT, IN, QUALS); \ |
49706e39 MLI |
6309 | break; \ |
6310 | case ic_return: \ | |
5c1bc275 | 6311 | pedwarn (LOCATION, OPT, RE, QUALS); \ |
49706e39 MLI |
6312 | break; \ |
6313 | default: \ | |
6314 | gcc_unreachable (); \ | |
6315 | } \ | |
6316 | } while (0) | |
6317 | ||
768952be MU |
6318 | /* This macro is used to emit diagnostics to ensure that all format |
6319 | strings are complete sentences, visible to gettext and checked at | |
6320 | compile time. It is the same as PEDWARN_FOR_QUALIFIERS but uses | |
6321 | warning_at instead of pedwarn. */ | |
6322 | #define WARNING_FOR_QUALIFIERS(LOCATION, PLOC, OPT, AR, AS, IN, RE, QUALS) \ | |
6323 | do { \ | |
6324 | switch (errtype) \ | |
6325 | { \ | |
6326 | case ic_argpass: \ | |
6327 | if (warning_at (PLOC, OPT, AR, parmnum, rname, QUALS)) \ | |
8139a48e | 6328 | inform_for_arg (fundecl, (PLOC), parmnum, type, rhstype); \ |
768952be MU |
6329 | break; \ |
6330 | case ic_assign: \ | |
6331 | warning_at (LOCATION, OPT, AS, QUALS); \ | |
6332 | break; \ | |
6333 | case ic_init: \ | |
6334 | warning_at (LOCATION, OPT, IN, QUALS); \ | |
6335 | break; \ | |
6336 | case ic_return: \ | |
6337 | warning_at (LOCATION, OPT, RE, QUALS); \ | |
6338 | break; \ | |
6339 | default: \ | |
6340 | gcc_unreachable (); \ | |
6341 | } \ | |
6342 | } while (0) | |
6343 | ||
8ce94e44 JM |
6344 | if (TREE_CODE (rhs) == EXCESS_PRECISION_EXPR) |
6345 | rhs = TREE_OPERAND (rhs, 0); | |
6346 | ||
3e4093b6 RS |
6347 | rhstype = TREE_TYPE (rhs); |
6348 | coder = TREE_CODE (rhstype); | |
6349 | ||
6350 | if (coder == ERROR_MARK) | |
6351 | return error_mark_node; | |
6352 | ||
58393038 ZL |
6353 | if (c_dialect_objc ()) |
6354 | { | |
6355 | int parmno; | |
6356 | ||
6357 | switch (errtype) | |
6358 | { | |
6359 | case ic_return: | |
6360 | parmno = 0; | |
6361 | break; | |
6362 | ||
6363 | case ic_assign: | |
6364 | parmno = -1; | |
6365 | break; | |
6366 | ||
6367 | case ic_init: | |
6368 | parmno = -2; | |
6369 | break; | |
6370 | ||
6371 | default: | |
6372 | parmno = parmnum; | |
6373 | break; | |
6374 | } | |
6375 | ||
6376 | objc_ok = objc_compare_types (type, rhstype, parmno, rname); | |
6377 | } | |
6378 | ||
bbbbb16a ILT |
6379 | if (warn_cxx_compat) |
6380 | { | |
6381 | tree checktype = origtype != NULL_TREE ? origtype : rhstype; | |
6382 | if (checktype != error_mark_node | |
6383 | && TREE_CODE (type) == ENUMERAL_TYPE | |
6384 | && TYPE_MAIN_VARIANT (checktype) != TYPE_MAIN_VARIANT (type)) | |
296c53ac MP |
6385 | switch (errtype) |
6386 | { | |
6387 | case ic_argpass: | |
6388 | if (pedwarn (expr_loc, OPT_Wc___compat, "enum conversion when " | |
6389 | "passing argument %d of %qE is invalid in C++", | |
6390 | parmnum, rname)) | |
6391 | inform ((fundecl && !DECL_IS_BUILTIN (fundecl)) | |
6392 | ? DECL_SOURCE_LOCATION (fundecl) : expr_loc, | |
6393 | "expected %qT but argument is of type %qT", | |
6394 | type, rhstype); | |
6395 | break; | |
6396 | case ic_assign: | |
6397 | pedwarn (location, OPT_Wc___compat, "enum conversion from %qT to " | |
6398 | "%qT in assignment is invalid in C++", rhstype, type); | |
6399 | break; | |
6400 | case ic_init: | |
6401 | pedwarn_init (location, OPT_Wc___compat, "enum conversion from " | |
6402 | "%qT to %qT in initialization is invalid in C++", | |
6403 | rhstype, type); | |
6404 | break; | |
6405 | case ic_return: | |
6406 | pedwarn (location, OPT_Wc___compat, "enum conversion from %qT to " | |
6407 | "%qT in return is invalid in C++", rhstype, type); | |
6408 | break; | |
6409 | default: | |
6410 | gcc_unreachable (); | |
6411 | } | |
bbbbb16a ILT |
6412 | } |
6413 | ||
3e4093b6 | 6414 | if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (rhstype)) |
59c0753d | 6415 | return rhs; |
3e4093b6 RS |
6416 | |
6417 | if (coder == VOID_TYPE) | |
400fbf9f | 6418 | { |
6dcc04b0 JM |
6419 | /* Except for passing an argument to an unprototyped function, |
6420 | this is a constraint violation. When passing an argument to | |
6421 | an unprototyped function, it is compile-time undefined; | |
6422 | making it a constraint in that case was rejected in | |
6423 | DR#252. */ | |
c2255bc4 | 6424 | error_at (location, "void value not ignored as it ought to be"); |
3e4093b6 | 6425 | return error_mark_node; |
400fbf9f | 6426 | } |
4f2e1536 | 6427 | rhs = require_complete_type (location, rhs); |
808d6eaa JM |
6428 | if (rhs == error_mark_node) |
6429 | return error_mark_node; | |
1807ffc1 MS |
6430 | |
6431 | if (coder == POINTER_TYPE && reject_gcc_builtin (rhs)) | |
6432 | return error_mark_node; | |
6433 | ||
cd192ccc MS |
6434 | /* A non-reference type can convert to a reference. This handles |
6435 | va_start, va_copy and possibly port built-ins. */ | |
6436 | if (codel == REFERENCE_TYPE && coder != REFERENCE_TYPE) | |
400fbf9f | 6437 | { |
3e4093b6 | 6438 | if (!lvalue_p (rhs)) |
400fbf9f | 6439 | { |
c2255bc4 | 6440 | error_at (location, "cannot pass rvalue to reference parameter"); |
3e4093b6 | 6441 | return error_mark_node; |
400fbf9f | 6442 | } |
3e4093b6 RS |
6443 | if (!c_mark_addressable (rhs)) |
6444 | return error_mark_node; | |
6445 | rhs = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (rhs)), rhs); | |
c2255bc4 | 6446 | SET_EXPR_LOCATION (rhs, location); |
3e4093b6 | 6447 | |
81e5eca8 | 6448 | rhs = convert_for_assignment (location, expr_loc, |
68fca595 MP |
6449 | build_pointer_type (TREE_TYPE (type)), |
6450 | rhs, origtype, errtype, | |
6451 | null_pointer_constant, fundecl, function, | |
6452 | parmnum); | |
cd192ccc MS |
6453 | if (rhs == error_mark_node) |
6454 | return error_mark_node; | |
3e4093b6 RS |
6455 | |
6456 | rhs = build1 (NOP_EXPR, type, rhs); | |
c2255bc4 | 6457 | SET_EXPR_LOCATION (rhs, location); |
3e4093b6 | 6458 | return rhs; |
400fbf9f | 6459 | } |
3e4093b6 | 6460 | /* Some types can interconvert without explicit casts. */ |
3274deff | 6461 | else if (codel == VECTOR_TYPE && coder == VECTOR_TYPE |
00c8e9f6 | 6462 | && vector_types_convertible_p (type, TREE_TYPE (rhs), true)) |
3e4093b6 RS |
6463 | return convert (type, rhs); |
6464 | /* Arithmetic types all interconvert, and enum is treated like int. */ | |
6465 | else if ((codel == INTEGER_TYPE || codel == REAL_TYPE | |
ab22c1fa | 6466 | || codel == FIXED_POINT_TYPE |
3e4093b6 RS |
6467 | || codel == ENUMERAL_TYPE || codel == COMPLEX_TYPE |
6468 | || codel == BOOLEAN_TYPE) | |
6469 | && (coder == INTEGER_TYPE || coder == REAL_TYPE | |
ab22c1fa | 6470 | || coder == FIXED_POINT_TYPE |
3e4093b6 RS |
6471 | || coder == ENUMERAL_TYPE || coder == COMPLEX_TYPE |
6472 | || coder == BOOLEAN_TYPE)) | |
928c19bb JM |
6473 | { |
6474 | tree ret; | |
6475 | bool save = in_late_binary_op; | |
e5341100 JJ |
6476 | if (codel == BOOLEAN_TYPE || codel == COMPLEX_TYPE |
6477 | || (coder == REAL_TYPE | |
6478 | && (codel == INTEGER_TYPE || codel == ENUMERAL_TYPE) | |
45b2222a | 6479 | && sanitize_flags_p (SANITIZE_FLOAT_CAST))) |
928c19bb | 6480 | in_late_binary_op = true; |
81e5eca8 MP |
6481 | ret = convert_and_check (expr_loc != UNKNOWN_LOCATION |
6482 | ? expr_loc : location, type, orig_rhs); | |
e5341100 | 6483 | in_late_binary_op = save; |
928c19bb JM |
6484 | return ret; |
6485 | } | |
400fbf9f | 6486 | |
79077aea JJ |
6487 | /* Aggregates in different TUs might need conversion. */ |
6488 | if ((codel == RECORD_TYPE || codel == UNION_TYPE) | |
6489 | && codel == coder | |
6490 | && comptypes (type, rhstype)) | |
81e5eca8 MP |
6491 | return convert_and_check (expr_loc != UNKNOWN_LOCATION |
6492 | ? expr_loc : location, type, rhs); | |
79077aea | 6493 | |
ebf0bf7f | 6494 | /* Conversion to a transparent union or record from its member types. |
3e4093b6 | 6495 | This applies only to function arguments. */ |
ebf0bf7f JJ |
6496 | if (((codel == UNION_TYPE || codel == RECORD_TYPE) |
6497 | && TYPE_TRANSPARENT_AGGR (type)) | |
6b4ef5c1 | 6498 | && errtype == ic_argpass) |
400fbf9f | 6499 | { |
0257e383 | 6500 | tree memb, marginal_memb = NULL_TREE; |
3e4093b6 | 6501 | |
910ad8de | 6502 | for (memb = TYPE_FIELDS (type); memb ; memb = DECL_CHAIN (memb)) |
400fbf9f | 6503 | { |
0257e383 | 6504 | tree memb_type = TREE_TYPE (memb); |
400fbf9f | 6505 | |
3e4093b6 | 6506 | if (comptypes (TYPE_MAIN_VARIANT (memb_type), |
132da1a5 | 6507 | TYPE_MAIN_VARIANT (rhstype))) |
3e4093b6 | 6508 | break; |
e58cd767 | 6509 | |
3e4093b6 RS |
6510 | if (TREE_CODE (memb_type) != POINTER_TYPE) |
6511 | continue; | |
2f6e4e97 | 6512 | |
3e4093b6 RS |
6513 | if (coder == POINTER_TYPE) |
6514 | { | |
6515 | tree ttl = TREE_TYPE (memb_type); | |
6516 | tree ttr = TREE_TYPE (rhstype); | |
400fbf9f | 6517 | |
3e4093b6 RS |
6518 | /* Any non-function converts to a [const][volatile] void * |
6519 | and vice versa; otherwise, targets must be the same. | |
6520 | Meanwhile, the lhs target must have all the qualifiers of | |
6521 | the rhs. */ | |
267bac10 JM |
6522 | if ((VOID_TYPE_P (ttl) && !TYPE_ATOMIC (ttl)) |
6523 | || (VOID_TYPE_P (ttr) && !TYPE_ATOMIC (ttr)) | |
744aa42f | 6524 | || comp_target_types (location, memb_type, rhstype)) |
3e4093b6 | 6525 | { |
267bac10 JM |
6526 | int lquals = TYPE_QUALS (ttl) & ~TYPE_QUAL_ATOMIC; |
6527 | int rquals = TYPE_QUALS (ttr) & ~TYPE_QUAL_ATOMIC; | |
3e4093b6 | 6528 | /* If this type won't generate any warnings, use it. */ |
267bac10 | 6529 | if (lquals == rquals |
3e4093b6 RS |
6530 | || ((TREE_CODE (ttr) == FUNCTION_TYPE |
6531 | && TREE_CODE (ttl) == FUNCTION_TYPE) | |
267bac10 JM |
6532 | ? ((lquals | rquals) == rquals) |
6533 | : ((lquals | rquals) == lquals))) | |
3e4093b6 | 6534 | break; |
400fbf9f | 6535 | |
3e4093b6 | 6536 | /* Keep looking for a better type, but remember this one. */ |
0257e383 RH |
6537 | if (!marginal_memb) |
6538 | marginal_memb = memb; | |
3e4093b6 RS |
6539 | } |
6540 | } | |
82bde854 | 6541 | |
3e4093b6 | 6542 | /* Can convert integer zero to any pointer type. */ |
928c19bb | 6543 | if (null_pointer_constant) |
3e4093b6 RS |
6544 | { |
6545 | rhs = null_pointer_node; | |
6546 | break; | |
6547 | } | |
6548 | } | |
400fbf9f | 6549 | |
0257e383 | 6550 | if (memb || marginal_memb) |
3e4093b6 | 6551 | { |
0257e383 | 6552 | if (!memb) |
3e4093b6 RS |
6553 | { |
6554 | /* We have only a marginally acceptable member type; | |
6555 | it needs a warning. */ | |
0257e383 | 6556 | tree ttl = TREE_TYPE (TREE_TYPE (marginal_memb)); |
3e4093b6 | 6557 | tree ttr = TREE_TYPE (rhstype); |
714a0864 | 6558 | |
3e4093b6 RS |
6559 | /* Const and volatile mean something different for function |
6560 | types, so the usual warnings are not appropriate. */ | |
6561 | if (TREE_CODE (ttr) == FUNCTION_TYPE | |
6562 | && TREE_CODE (ttl) == FUNCTION_TYPE) | |
6563 | { | |
6564 | /* Because const and volatile on functions are | |
6565 | restrictions that say the function will not do | |
6566 | certain things, it is okay to use a const or volatile | |
6567 | function where an ordinary one is wanted, but not | |
6568 | vice-versa. */ | |
36c5e70a BE |
6569 | if (TYPE_QUALS_NO_ADDR_SPACE (ttl) |
6570 | & ~TYPE_QUALS_NO_ADDR_SPACE (ttr)) | |
768952be MU |
6571 | PEDWARN_FOR_QUALIFIERS (location, expr_loc, |
6572 | OPT_Wdiscarded_qualifiers, | |
6573 | G_("passing argument %d of %qE " | |
6574 | "makes %q#v qualified function " | |
6575 | "pointer from unqualified"), | |
6576 | G_("assignment makes %q#v qualified " | |
6577 | "function pointer from " | |
6578 | "unqualified"), | |
6579 | G_("initialization makes %q#v qualified " | |
6580 | "function pointer from " | |
6581 | "unqualified"), | |
6582 | G_("return makes %q#v qualified function " | |
6583 | "pointer from unqualified"), | |
6584 | TYPE_QUALS (ttl) & ~TYPE_QUALS (ttr)); | |
3e4093b6 | 6585 | } |
36c5e70a BE |
6586 | else if (TYPE_QUALS_NO_ADDR_SPACE (ttr) |
6587 | & ~TYPE_QUALS_NO_ADDR_SPACE (ttl)) | |
768952be MU |
6588 | PEDWARN_FOR_QUALIFIERS (location, expr_loc, |
6589 | OPT_Wdiscarded_qualifiers, | |
6590 | G_("passing argument %d of %qE discards " | |
6591 | "%qv qualifier from pointer target type"), | |
6592 | G_("assignment discards %qv qualifier " | |
6593 | "from pointer target type"), | |
6594 | G_("initialization discards %qv qualifier " | |
6595 | "from pointer target type"), | |
6596 | G_("return discards %qv qualifier from " | |
6597 | "pointer target type"), | |
6598 | TYPE_QUALS (ttr) & ~TYPE_QUALS (ttl)); | |
0257e383 RH |
6599 | |
6600 | memb = marginal_memb; | |
3e4093b6 | 6601 | } |
400fbf9f | 6602 | |
fcf73884 | 6603 | if (!fundecl || !DECL_IN_SYSTEM_HEADER (fundecl)) |
c1771a20 | 6604 | pedwarn (location, OPT_Wpedantic, |
fcf73884 | 6605 | "ISO C prohibits argument conversion to union type"); |
0e7c47fa | 6606 | |
db3927fb | 6607 | rhs = fold_convert_loc (location, TREE_TYPE (memb), rhs); |
0257e383 | 6608 | return build_constructor_single (type, memb, rhs); |
3e4093b6 | 6609 | } |
0e7c47fa RK |
6610 | } |
6611 | ||
3e4093b6 RS |
6612 | /* Conversions among pointers */ |
6613 | else if ((codel == POINTER_TYPE || codel == REFERENCE_TYPE) | |
6614 | && (coder == codel)) | |
400fbf9f | 6615 | { |
3e4093b6 RS |
6616 | tree ttl = TREE_TYPE (type); |
6617 | tree ttr = TREE_TYPE (rhstype); | |
46df2823 JM |
6618 | tree mvl = ttl; |
6619 | tree mvr = ttr; | |
3e4093b6 | 6620 | bool is_opaque_pointer; |
264fa2db | 6621 | int target_cmp = 0; /* Cache comp_target_types () result. */ |
36c5e70a BE |
6622 | addr_space_t asl; |
6623 | addr_space_t asr; | |
400fbf9f | 6624 | |
46df2823 | 6625 | if (TREE_CODE (mvl) != ARRAY_TYPE) |
267bac10 JM |
6626 | mvl = (TYPE_ATOMIC (mvl) |
6627 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (mvl), | |
6628 | TYPE_QUAL_ATOMIC) | |
6629 | : TYPE_MAIN_VARIANT (mvl)); | |
46df2823 | 6630 | if (TREE_CODE (mvr) != ARRAY_TYPE) |
267bac10 JM |
6631 | mvr = (TYPE_ATOMIC (mvr) |
6632 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (mvr), | |
6633 | TYPE_QUAL_ATOMIC) | |
6634 | : TYPE_MAIN_VARIANT (mvr)); | |
3e4093b6 | 6635 | /* Opaque pointers are treated like void pointers. */ |
f83c7f63 | 6636 | is_opaque_pointer = vector_targets_convertible_p (ttl, ttr); |
c22cacf3 | 6637 | |
478a1c5b ILT |
6638 | /* The Plan 9 compiler permits a pointer to a struct to be |
6639 | automatically converted into a pointer to an anonymous field | |
6640 | within the struct. */ | |
6641 | if (flag_plan9_extensions | |
3e636daf MP |
6642 | && RECORD_OR_UNION_TYPE_P (mvl) |
6643 | && RECORD_OR_UNION_TYPE_P (mvr) | |
478a1c5b ILT |
6644 | && mvl != mvr) |
6645 | { | |
6646 | tree new_rhs = convert_to_anonymous_field (location, type, rhs); | |
6647 | if (new_rhs != NULL_TREE) | |
6648 | { | |
6649 | rhs = new_rhs; | |
6650 | rhstype = TREE_TYPE (rhs); | |
6651 | coder = TREE_CODE (rhstype); | |
6652 | ttr = TREE_TYPE (rhstype); | |
6653 | mvr = TYPE_MAIN_VARIANT (ttr); | |
6654 | } | |
6655 | } | |
6656 | ||
b7e20b53 | 6657 | /* C++ does not allow the implicit conversion void* -> T*. However, |
c22cacf3 MS |
6658 | for the purpose of reducing the number of false positives, we |
6659 | tolerate the special case of | |
b7e20b53 | 6660 | |
c22cacf3 | 6661 | int *p = NULL; |
b7e20b53 | 6662 | |
c22cacf3 | 6663 | where NULL is typically defined in C to be '(void *) 0'. */ |
c6bdf92e | 6664 | if (VOID_TYPE_P (ttr) && rhs != null_pointer_node && !VOID_TYPE_P (ttl)) |
8ffcdea8 MP |
6665 | warning_at (errtype == ic_argpass ? expr_loc : location, |
6666 | OPT_Wc___compat, | |
6667 | "request for implicit conversion " | |
c2255bc4 | 6668 | "from %qT to %qT not permitted in C++", rhstype, type); |
400fbf9f | 6669 | |
36c5e70a BE |
6670 | /* See if the pointers point to incompatible address spaces. */ |
6671 | asl = TYPE_ADDR_SPACE (ttl); | |
6672 | asr = TYPE_ADDR_SPACE (ttr); | |
6673 | if (!null_pointer_constant_p (rhs) | |
6674 | && asr != asl && !targetm.addr_space.subset_p (asr, asl)) | |
6675 | { | |
6676 | switch (errtype) | |
6677 | { | |
6678 | case ic_argpass: | |
8ffcdea8 | 6679 | error_at (expr_loc, "passing argument %d of %qE from pointer to " |
36c5e70a BE |
6680 | "non-enclosed address space", parmnum, rname); |
6681 | break; | |
6682 | case ic_assign: | |
6683 | error_at (location, "assignment from pointer to " | |
6684 | "non-enclosed address space"); | |
6685 | break; | |
6686 | case ic_init: | |
6687 | error_at (location, "initialization from pointer to " | |
6688 | "non-enclosed address space"); | |
6689 | break; | |
6690 | case ic_return: | |
6691 | error_at (location, "return from pointer to " | |
6692 | "non-enclosed address space"); | |
6693 | break; | |
6694 | default: | |
6695 | gcc_unreachable (); | |
6696 | } | |
6697 | return error_mark_node; | |
6698 | } | |
6699 | ||
7876a414 KG |
6700 | /* Check if the right-hand side has a format attribute but the |
6701 | left-hand side doesn't. */ | |
90137d8f | 6702 | if (warn_suggest_attribute_format |
104f8784 | 6703 | && check_missing_format_attribute (type, rhstype)) |
c22cacf3 | 6704 | { |
104f8784 KG |
6705 | switch (errtype) |
6706 | { | |
6707 | case ic_argpass: | |
8ffcdea8 | 6708 | warning_at (expr_loc, OPT_Wsuggest_attribute_format, |
c2255bc4 AH |
6709 | "argument %d of %qE might be " |
6710 | "a candidate for a format attribute", | |
6711 | parmnum, rname); | |
104f8784 KG |
6712 | break; |
6713 | case ic_assign: | |
90137d8f | 6714 | warning_at (location, OPT_Wsuggest_attribute_format, |
c2255bc4 AH |
6715 | "assignment left-hand side might be " |
6716 | "a candidate for a format attribute"); | |
104f8784 KG |
6717 | break; |
6718 | case ic_init: | |
90137d8f | 6719 | warning_at (location, OPT_Wsuggest_attribute_format, |
c2255bc4 AH |
6720 | "initialization left-hand side might be " |
6721 | "a candidate for a format attribute"); | |
104f8784 KG |
6722 | break; |
6723 | case ic_return: | |
90137d8f | 6724 | warning_at (location, OPT_Wsuggest_attribute_format, |
c2255bc4 AH |
6725 | "return type might be " |
6726 | "a candidate for a format attribute"); | |
104f8784 KG |
6727 | break; |
6728 | default: | |
6729 | gcc_unreachable (); | |
6730 | } | |
7876a414 | 6731 | } |
c22cacf3 | 6732 | |
3e4093b6 RS |
6733 | /* Any non-function converts to a [const][volatile] void * |
6734 | and vice versa; otherwise, targets must be the same. | |
6735 | Meanwhile, the lhs target must have all the qualifiers of the rhs. */ | |
267bac10 JM |
6736 | if ((VOID_TYPE_P (ttl) && !TYPE_ATOMIC (ttl)) |
6737 | || (VOID_TYPE_P (ttr) && !TYPE_ATOMIC (ttr)) | |
744aa42f | 6738 | || (target_cmp = comp_target_types (location, type, rhstype)) |
3e4093b6 | 6739 | || is_opaque_pointer |
f8a93a2e JJ |
6740 | || ((c_common_unsigned_type (mvl) |
6741 | == c_common_unsigned_type (mvr)) | |
267bac10 JM |
6742 | && (c_common_signed_type (mvl) |
6743 | == c_common_signed_type (mvr)) | |
6744 | && TYPE_ATOMIC (mvl) == TYPE_ATOMIC (mvr))) | |
3e4093b6 | 6745 | { |
768952be MU |
6746 | /* Warn about loss of qualifers from pointers to arrays with |
6747 | qualifiers on the element type. */ | |
6748 | if (TREE_CODE (ttr) == ARRAY_TYPE) | |
6749 | { | |
6750 | ttr = strip_array_types (ttr); | |
6751 | ttl = strip_array_types (ttl); | |
6752 | ||
6753 | if (TYPE_QUALS_NO_ADDR_SPACE_NO_ATOMIC (ttr) | |
6754 | & ~TYPE_QUALS_NO_ADDR_SPACE_NO_ATOMIC (ttl)) | |
6755 | WARNING_FOR_QUALIFIERS (location, expr_loc, | |
6756 | OPT_Wdiscarded_array_qualifiers, | |
6757 | G_("passing argument %d of %qE discards " | |
6758 | "%qv qualifier from pointer target type"), | |
6759 | G_("assignment discards %qv qualifier " | |
6760 | "from pointer target type"), | |
6761 | G_("initialization discards %qv qualifier " | |
6762 | "from pointer target type"), | |
6763 | G_("return discards %qv qualifier from " | |
6764 | "pointer target type"), | |
6765 | TYPE_QUALS (ttr) & ~TYPE_QUALS (ttl)); | |
6766 | } | |
6767 | else if (pedantic | |
3e4093b6 RS |
6768 | && ((VOID_TYPE_P (ttl) && TREE_CODE (ttr) == FUNCTION_TYPE) |
6769 | || | |
6770 | (VOID_TYPE_P (ttr) | |
928c19bb | 6771 | && !null_pointer_constant |
3e4093b6 | 6772 | && TREE_CODE (ttl) == FUNCTION_TYPE))) |
768952be MU |
6773 | PEDWARN_FOR_ASSIGNMENT (location, expr_loc, OPT_Wpedantic, |
6774 | G_("ISO C forbids passing argument %d of " | |
6775 | "%qE between function pointer " | |
6776 | "and %<void *%>"), | |
6777 | G_("ISO C forbids assignment between " | |
6778 | "function pointer and %<void *%>"), | |
6779 | G_("ISO C forbids initialization between " | |
6780 | "function pointer and %<void *%>"), | |
6781 | G_("ISO C forbids return between function " | |
6782 | "pointer and %<void *%>")); | |
3e4093b6 RS |
6783 | /* Const and volatile mean something different for function types, |
6784 | so the usual warnings are not appropriate. */ | |
6785 | else if (TREE_CODE (ttr) != FUNCTION_TYPE | |
6786 | && TREE_CODE (ttl) != FUNCTION_TYPE) | |
6787 | { | |
768952be MU |
6788 | /* Don't warn about loss of qualifier for conversions from |
6789 | qualified void* to pointers to arrays with corresponding | |
6790 | qualifier on the element type. */ | |
6791 | if (!pedantic) | |
6792 | ttl = strip_array_types (ttl); | |
6793 | ||
267bac10 JM |
6794 | /* Assignments between atomic and non-atomic objects are OK. */ |
6795 | if (TYPE_QUALS_NO_ADDR_SPACE_NO_ATOMIC (ttr) | |
6796 | & ~TYPE_QUALS_NO_ADDR_SPACE_NO_ATOMIC (ttl)) | |
58393038 | 6797 | { |
768952be MU |
6798 | PEDWARN_FOR_QUALIFIERS (location, expr_loc, |
6799 | OPT_Wdiscarded_qualifiers, | |
6800 | G_("passing argument %d of %qE discards " | |
6801 | "%qv qualifier from pointer target type"), | |
6802 | G_("assignment discards %qv qualifier " | |
6803 | "from pointer target type"), | |
6804 | G_("initialization discards %qv qualifier " | |
6805 | "from pointer target type"), | |
6806 | G_("return discards %qv qualifier from " | |
6807 | "pointer target type"), | |
6808 | TYPE_QUALS (ttr) & ~TYPE_QUALS (ttl)); | |
58393038 | 6809 | } |
3e4093b6 RS |
6810 | /* If this is not a case of ignoring a mismatch in signedness, |
6811 | no warning. */ | |
6812 | else if (VOID_TYPE_P (ttl) || VOID_TYPE_P (ttr) | |
264fa2db | 6813 | || target_cmp) |
3e4093b6 RS |
6814 | ; |
6815 | /* If there is a mismatch, do warn. */ | |
f2fd3821 | 6816 | else if (warn_pointer_sign) |
296c53ac MP |
6817 | switch (errtype) |
6818 | { | |
6819 | case ic_argpass: | |
6820 | if (pedwarn (expr_loc, OPT_Wpointer_sign, | |
6821 | "pointer targets in passing argument %d of " | |
6822 | "%qE differ in signedness", parmnum, rname)) | |
6823 | inform ((fundecl && !DECL_IS_BUILTIN (fundecl)) | |
6824 | ? DECL_SOURCE_LOCATION (fundecl) : expr_loc, | |
6825 | "expected %qT but argument is of type %qT", | |
6826 | type, rhstype); | |
6827 | break; | |
6828 | case ic_assign: | |
6829 | pedwarn (location, OPT_Wpointer_sign, | |
6830 | "pointer targets in assignment from %qT to %qT " | |
6831 | "differ in signedness", rhstype, type); | |
6832 | break; | |
6833 | case ic_init: | |
6834 | pedwarn_init (location, OPT_Wpointer_sign, | |
6835 | "pointer targets in initialization of %qT " | |
6836 | "from %qT differ in signedness", type, | |
6837 | rhstype); | |
6838 | break; | |
6839 | case ic_return: | |
6840 | pedwarn (location, OPT_Wpointer_sign, "pointer targets in " | |
6841 | "returning %qT from a function with return type " | |
6842 | "%qT differ in signedness", rhstype, type); | |
6843 | break; | |
6844 | default: | |
6845 | gcc_unreachable (); | |
6846 | } | |
3e4093b6 RS |
6847 | } |
6848 | else if (TREE_CODE (ttl) == FUNCTION_TYPE | |
6849 | && TREE_CODE (ttr) == FUNCTION_TYPE) | |
6850 | { | |
6851 | /* Because const and volatile on functions are restrictions | |
6852 | that say the function will not do certain things, | |
6853 | it is okay to use a const or volatile function | |
6854 | where an ordinary one is wanted, but not vice-versa. */ | |
36c5e70a BE |
6855 | if (TYPE_QUALS_NO_ADDR_SPACE (ttl) |
6856 | & ~TYPE_QUALS_NO_ADDR_SPACE (ttr)) | |
768952be MU |
6857 | PEDWARN_FOR_QUALIFIERS (location, expr_loc, |
6858 | OPT_Wdiscarded_qualifiers, | |
6859 | G_("passing argument %d of %qE makes " | |
6860 | "%q#v qualified function pointer " | |
6861 | "from unqualified"), | |
6862 | G_("assignment makes %q#v qualified function " | |
6863 | "pointer from unqualified"), | |
6864 | G_("initialization makes %q#v qualified " | |
6865 | "function pointer from unqualified"), | |
6866 | G_("return makes %q#v qualified function " | |
6867 | "pointer from unqualified"), | |
6868 | TYPE_QUALS (ttl) & ~TYPE_QUALS (ttr)); | |
3e4093b6 RS |
6869 | } |
6870 | } | |
296c53ac MP |
6871 | /* Avoid warning about the volatile ObjC EH puts on decls. */ |
6872 | else if (!objc_ok) | |
6873 | { | |
6874 | switch (errtype) | |
6875 | { | |
6876 | case ic_argpass: | |
6877 | if (pedwarn (expr_loc, OPT_Wincompatible_pointer_types, | |
6878 | "passing argument %d of %qE from incompatible " | |
6879 | "pointer type", parmnum, rname)) | |
8139a48e | 6880 | inform_for_arg (fundecl, expr_loc, parmnum, type, rhstype); |
296c53ac MP |
6881 | break; |
6882 | case ic_assign: | |
6883 | pedwarn (location, OPT_Wincompatible_pointer_types, | |
6884 | "assignment to %qT from incompatible pointer type %qT", | |
6885 | type, rhstype); | |
6886 | break; | |
6887 | case ic_init: | |
6888 | pedwarn_init (location, OPT_Wincompatible_pointer_types, | |
6889 | "initialization of %qT from incompatible pointer " | |
6890 | "type %qT", type, rhstype); | |
6891 | break; | |
6892 | case ic_return: | |
6893 | pedwarn (location, OPT_Wincompatible_pointer_types, | |
6894 | "returning %qT from a function with incompatible " | |
6895 | "return type %qT", rhstype, type); | |
6896 | break; | |
6897 | default: | |
6898 | gcc_unreachable (); | |
6899 | } | |
6900 | } | |
58393038 | 6901 | |
3e4093b6 RS |
6902 | return convert (type, rhs); |
6903 | } | |
b494fd98 EB |
6904 | else if (codel == POINTER_TYPE && coder == ARRAY_TYPE) |
6905 | { | |
6dcc04b0 JM |
6906 | /* ??? This should not be an error when inlining calls to |
6907 | unprototyped functions. */ | |
c2255bc4 | 6908 | error_at (location, "invalid use of non-lvalue array"); |
b494fd98 EB |
6909 | return error_mark_node; |
6910 | } | |
3e4093b6 | 6911 | else if (codel == POINTER_TYPE && coder == INTEGER_TYPE) |
400fbf9f | 6912 | { |
3e4093b6 RS |
6913 | /* An explicit constant 0 can convert to a pointer, |
6914 | or one that results from arithmetic, even including | |
6915 | a cast to integer type. */ | |
928c19bb | 6916 | if (!null_pointer_constant) |
296c53ac MP |
6917 | switch (errtype) |
6918 | { | |
6919 | case ic_argpass: | |
6920 | if (pedwarn (expr_loc, OPT_Wint_conversion, | |
6921 | "passing argument %d of %qE makes pointer from " | |
6922 | "integer without a cast", parmnum, rname)) | |
8139a48e | 6923 | inform_for_arg (fundecl, expr_loc, parmnum, type, rhstype); |
296c53ac MP |
6924 | break; |
6925 | case ic_assign: | |
6926 | pedwarn (location, OPT_Wint_conversion, | |
6927 | "assignment to %qT from %qT makes pointer from integer " | |
6928 | "without a cast", type, rhstype); | |
6929 | break; | |
6930 | case ic_init: | |
6931 | pedwarn_init (location, OPT_Wint_conversion, | |
6932 | "initialization of %qT from %qT makes pointer from " | |
6933 | "integer without a cast", type, rhstype); | |
6934 | break; | |
6935 | case ic_return: | |
6936 | pedwarn (location, OPT_Wint_conversion, "returning %qT from a " | |
6937 | "function with return type %qT makes pointer from " | |
6938 | "integer without a cast", rhstype, type); | |
6939 | break; | |
6940 | default: | |
6941 | gcc_unreachable (); | |
6942 | } | |
b3006337 EB |
6943 | |
6944 | return convert (type, rhs); | |
400fbf9f | 6945 | } |
3e4093b6 | 6946 | else if (codel == INTEGER_TYPE && coder == POINTER_TYPE) |
400fbf9f | 6947 | { |
296c53ac MP |
6948 | switch (errtype) |
6949 | { | |
6950 | case ic_argpass: | |
6951 | if (pedwarn (expr_loc, OPT_Wint_conversion, | |
6952 | "passing argument %d of %qE makes integer from " | |
6953 | "pointer without a cast", parmnum, rname)) | |
8139a48e | 6954 | inform_for_arg (fundecl, expr_loc, parmnum, type, rhstype); |
296c53ac MP |
6955 | break; |
6956 | case ic_assign: | |
6957 | pedwarn (location, OPT_Wint_conversion, | |
6958 | "assignment to %qT from %qT makes integer from pointer " | |
6959 | "without a cast", type, rhstype); | |
6960 | break; | |
6961 | case ic_init: | |
6962 | pedwarn_init (location, OPT_Wint_conversion, | |
6963 | "initialization of %qT from %qT makes integer from " | |
6964 | "pointer without a cast", type, rhstype); | |
6965 | break; | |
6966 | case ic_return: | |
6967 | pedwarn (location, OPT_Wint_conversion, "returning %qT from a " | |
6968 | "function with return type %qT makes integer from " | |
6969 | "pointer without a cast", rhstype, type); | |
6970 | break; | |
6971 | default: | |
6972 | gcc_unreachable (); | |
6973 | } | |
6974 | ||
3e4093b6 RS |
6975 | return convert (type, rhs); |
6976 | } | |
6977 | else if (codel == BOOLEAN_TYPE && coder == POINTER_TYPE) | |
928c19bb JM |
6978 | { |
6979 | tree ret; | |
6980 | bool save = in_late_binary_op; | |
6981 | in_late_binary_op = true; | |
6982 | ret = convert (type, rhs); | |
6983 | in_late_binary_op = save; | |
6984 | return ret; | |
6985 | } | |
400fbf9f | 6986 | |
2ac2f164 | 6987 | switch (errtype) |
3e4093b6 | 6988 | { |
2ac2f164 | 6989 | case ic_argpass: |
8ffcdea8 MP |
6990 | error_at (expr_loc, "incompatible type for argument %d of %qE", parmnum, |
6991 | rname); | |
8139a48e | 6992 | inform_for_arg (fundecl, expr_loc, parmnum, type, rhstype); |
2ac2f164 JM |
6993 | break; |
6994 | case ic_assign: | |
c2255bc4 AH |
6995 | error_at (location, "incompatible types when assigning to type %qT from " |
6996 | "type %qT", type, rhstype); | |
2ac2f164 JM |
6997 | break; |
6998 | case ic_init: | |
c2255bc4 | 6999 | error_at (location, |
8ffcdea8 | 7000 | "incompatible types when initializing type %qT using type %qT", |
c2255bc4 | 7001 | type, rhstype); |
2ac2f164 JM |
7002 | break; |
7003 | case ic_return: | |
c2255bc4 | 7004 | error_at (location, |
8ffcdea8 | 7005 | "incompatible types when returning type %qT but %qT was " |
c2255bc4 | 7006 | "expected", rhstype, type); |
2ac2f164 JM |
7007 | break; |
7008 | default: | |
7009 | gcc_unreachable (); | |
400fbf9f | 7010 | } |
53b01f59 | 7011 | |
3e4093b6 RS |
7012 | return error_mark_node; |
7013 | } | |
3e4093b6 RS |
7014 | \f |
7015 | /* If VALUE is a compound expr all of whose expressions are constant, then | |
7016 | return its value. Otherwise, return error_mark_node. | |
15b732b2 | 7017 | |
3e4093b6 RS |
7018 | This is for handling COMPOUND_EXPRs as initializer elements |
7019 | which is allowed with a warning when -pedantic is specified. */ | |
15b732b2 | 7020 | |
3e4093b6 RS |
7021 | static tree |
7022 | valid_compound_expr_initializer (tree value, tree endtype) | |
7023 | { | |
7024 | if (TREE_CODE (value) == COMPOUND_EXPR) | |
7025 | { | |
7026 | if (valid_compound_expr_initializer (TREE_OPERAND (value, 0), endtype) | |
7027 | == error_mark_node) | |
7028 | return error_mark_node; | |
7029 | return valid_compound_expr_initializer (TREE_OPERAND (value, 1), | |
7030 | endtype); | |
7031 | } | |
116df786 | 7032 | else if (!initializer_constant_valid_p (value, endtype)) |
3e4093b6 RS |
7033 | return error_mark_node; |
7034 | else | |
7035 | return value; | |
15b732b2 | 7036 | } |
400fbf9f | 7037 | \f |
3e4093b6 RS |
7038 | /* Perform appropriate conversions on the initial value of a variable, |
7039 | store it in the declaration DECL, | |
7040 | and print any error messages that are appropriate. | |
bbbbb16a | 7041 | If ORIGTYPE is not NULL_TREE, it is the original type of INIT. |
c2255bc4 AH |
7042 | If the init is invalid, store an ERROR_MARK. |
7043 | ||
7044 | INIT_LOC is the location of the initial value. */ | |
400fbf9f | 7045 | |
3e4093b6 | 7046 | void |
c2255bc4 | 7047 | store_init_value (location_t init_loc, tree decl, tree init, tree origtype) |
400fbf9f | 7048 | { |
3e4093b6 | 7049 | tree value, type; |
928c19bb | 7050 | bool npc = false; |
400fbf9f | 7051 | |
3e4093b6 | 7052 | /* If variable's type was invalidly declared, just ignore it. */ |
400fbf9f | 7053 | |
3e4093b6 RS |
7054 | type = TREE_TYPE (decl); |
7055 | if (TREE_CODE (type) == ERROR_MARK) | |
7056 | return; | |
400fbf9f | 7057 | |
3e4093b6 | 7058 | /* Digest the specified initializer into an expression. */ |
400fbf9f | 7059 | |
928c19bb JM |
7060 | if (init) |
7061 | npc = null_pointer_constant_p (init); | |
c2255bc4 AH |
7062 | value = digest_init (init_loc, type, init, origtype, npc, |
7063 | true, TREE_STATIC (decl)); | |
400fbf9f | 7064 | |
3e4093b6 | 7065 | /* Store the expression if valid; else report error. */ |
400fbf9f | 7066 | |
8400e75e | 7067 | if (!in_system_header_at (input_location) |
3f75a254 | 7068 | && AGGREGATE_TYPE_P (TREE_TYPE (decl)) && !TREE_STATIC (decl)) |
3176a0c2 DD |
7069 | warning (OPT_Wtraditional, "traditional C rejects automatic " |
7070 | "aggregate initialization"); | |
2f6e4e97 | 7071 | |
dea63e49 JJ |
7072 | if (value != error_mark_node || TREE_CODE (decl) != FUNCTION_DECL) |
7073 | DECL_INITIAL (decl) = value; | |
400fbf9f | 7074 | |
3e4093b6 RS |
7075 | /* ANSI wants warnings about out-of-range constant initializers. */ |
7076 | STRIP_TYPE_NOPS (value); | |
b8698a0f | 7077 | if (TREE_STATIC (decl)) |
c2658540 | 7078 | constant_expression_warning (value); |
400fbf9f | 7079 | |
3e4093b6 RS |
7080 | /* Check if we need to set array size from compound literal size. */ |
7081 | if (TREE_CODE (type) == ARRAY_TYPE | |
3fa8871b | 7082 | && TYPE_DOMAIN (type) == NULL_TREE |
3e4093b6 | 7083 | && value != error_mark_node) |
400fbf9f | 7084 | { |
3e4093b6 RS |
7085 | tree inside_init = init; |
7086 | ||
ed248cf7 | 7087 | STRIP_TYPE_NOPS (inside_init); |
3e4093b6 RS |
7088 | inside_init = fold (inside_init); |
7089 | ||
7090 | if (TREE_CODE (inside_init) == COMPOUND_LITERAL_EXPR) | |
7091 | { | |
8d9f82d5 | 7092 | tree cldecl = COMPOUND_LITERAL_EXPR_DECL (inside_init); |
3e4093b6 | 7093 | |
8d9f82d5 | 7094 | if (TYPE_DOMAIN (TREE_TYPE (cldecl))) |
3e4093b6 RS |
7095 | { |
7096 | /* For int foo[] = (int [3]){1}; we need to set array size | |
7097 | now since later on array initializer will be just the | |
7098 | brace enclosed list of the compound literal. */ | |
e30ecc5d | 7099 | tree etype = strip_array_types (TREE_TYPE (decl)); |
8d9f82d5 | 7100 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); |
8d9f82d5 | 7101 | TYPE_DOMAIN (type) = TYPE_DOMAIN (TREE_TYPE (cldecl)); |
3e4093b6 | 7102 | layout_type (type); |
8d9f82d5 | 7103 | layout_decl (cldecl, 0); |
e30ecc5d JJ |
7104 | TREE_TYPE (decl) |
7105 | = c_build_qualified_type (type, TYPE_QUALS (etype)); | |
3e4093b6 RS |
7106 | } |
7107 | } | |
400fbf9f | 7108 | } |
3e4093b6 RS |
7109 | } |
7110 | \f | |
7111 | /* Methods for storing and printing names for error messages. */ | |
400fbf9f | 7112 | |
3e4093b6 RS |
7113 | /* Implement a spelling stack that allows components of a name to be pushed |
7114 | and popped. Each element on the stack is this structure. */ | |
400fbf9f | 7115 | |
3e4093b6 RS |
7116 | struct spelling |
7117 | { | |
7118 | int kind; | |
7119 | union | |
400fbf9f | 7120 | { |
a0f0ab9f | 7121 | unsigned HOST_WIDE_INT i; |
3e4093b6 RS |
7122 | const char *s; |
7123 | } u; | |
7124 | }; | |
2f6e4e97 | 7125 | |
3e4093b6 RS |
7126 | #define SPELLING_STRING 1 |
7127 | #define SPELLING_MEMBER 2 | |
7128 | #define SPELLING_BOUNDS 3 | |
400fbf9f | 7129 | |
3e4093b6 RS |
7130 | static struct spelling *spelling; /* Next stack element (unused). */ |
7131 | static struct spelling *spelling_base; /* Spelling stack base. */ | |
7132 | static int spelling_size; /* Size of the spelling stack. */ | |
400fbf9f | 7133 | |
3e4093b6 RS |
7134 | /* Macros to save and restore the spelling stack around push_... functions. |
7135 | Alternative to SAVE_SPELLING_STACK. */ | |
400fbf9f | 7136 | |
3e4093b6 RS |
7137 | #define SPELLING_DEPTH() (spelling - spelling_base) |
7138 | #define RESTORE_SPELLING_DEPTH(DEPTH) (spelling = spelling_base + (DEPTH)) | |
400fbf9f | 7139 | |
3e4093b6 RS |
7140 | /* Push an element on the spelling stack with type KIND and assign VALUE |
7141 | to MEMBER. */ | |
400fbf9f | 7142 | |
3e4093b6 RS |
7143 | #define PUSH_SPELLING(KIND, VALUE, MEMBER) \ |
7144 | { \ | |
7145 | int depth = SPELLING_DEPTH (); \ | |
7146 | \ | |
7147 | if (depth >= spelling_size) \ | |
7148 | { \ | |
7149 | spelling_size += 10; \ | |
cca8ead2 BI |
7150 | spelling_base = XRESIZEVEC (struct spelling, spelling_base, \ |
7151 | spelling_size); \ | |
3e4093b6 RS |
7152 | RESTORE_SPELLING_DEPTH (depth); \ |
7153 | } \ | |
7154 | \ | |
7155 | spelling->kind = (KIND); \ | |
7156 | spelling->MEMBER = (VALUE); \ | |
7157 | spelling++; \ | |
7158 | } | |
400fbf9f | 7159 | |
3e4093b6 | 7160 | /* Push STRING on the stack. Printed literally. */ |
400fbf9f | 7161 | |
3e4093b6 RS |
7162 | static void |
7163 | push_string (const char *string) | |
7164 | { | |
7165 | PUSH_SPELLING (SPELLING_STRING, string, u.s); | |
7166 | } | |
400fbf9f | 7167 | |
3e4093b6 | 7168 | /* Push a member name on the stack. Printed as '.' STRING. */ |
400fbf9f | 7169 | |
3e4093b6 RS |
7170 | static void |
7171 | push_member_name (tree decl) | |
7172 | { | |
7173 | const char *const string | |
88388a52 JM |
7174 | = (DECL_NAME (decl) |
7175 | ? identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))) | |
7176 | : _("<anonymous>")); | |
3e4093b6 RS |
7177 | PUSH_SPELLING (SPELLING_MEMBER, string, u.s); |
7178 | } | |
400fbf9f | 7179 | |
3e4093b6 | 7180 | /* Push an array bounds on the stack. Printed as [BOUNDS]. */ |
400fbf9f | 7181 | |
3e4093b6 | 7182 | static void |
a0f0ab9f | 7183 | push_array_bounds (unsigned HOST_WIDE_INT bounds) |
3e4093b6 RS |
7184 | { |
7185 | PUSH_SPELLING (SPELLING_BOUNDS, bounds, u.i); | |
7186 | } | |
bb58bec5 | 7187 | |
3e4093b6 | 7188 | /* Compute the maximum size in bytes of the printed spelling. */ |
400fbf9f | 7189 | |
3e4093b6 RS |
7190 | static int |
7191 | spelling_length (void) | |
7192 | { | |
7193 | int size = 0; | |
7194 | struct spelling *p; | |
400fbf9f | 7195 | |
3e4093b6 RS |
7196 | for (p = spelling_base; p < spelling; p++) |
7197 | { | |
7198 | if (p->kind == SPELLING_BOUNDS) | |
7199 | size += 25; | |
7200 | else | |
7201 | size += strlen (p->u.s) + 1; | |
7202 | } | |
7203 | ||
7204 | return size; | |
400fbf9f | 7205 | } |
400fbf9f | 7206 | |
3e4093b6 | 7207 | /* Print the spelling to BUFFER and return it. */ |
400fbf9f | 7208 | |
3e4093b6 RS |
7209 | static char * |
7210 | print_spelling (char *buffer) | |
400fbf9f | 7211 | { |
3e4093b6 RS |
7212 | char *d = buffer; |
7213 | struct spelling *p; | |
400fbf9f | 7214 | |
3e4093b6 RS |
7215 | for (p = spelling_base; p < spelling; p++) |
7216 | if (p->kind == SPELLING_BOUNDS) | |
7217 | { | |
a0f0ab9f | 7218 | sprintf (d, "[" HOST_WIDE_INT_PRINT_UNSIGNED "]", p->u.i); |
3e4093b6 RS |
7219 | d += strlen (d); |
7220 | } | |
7221 | else | |
7222 | { | |
7223 | const char *s; | |
7224 | if (p->kind == SPELLING_MEMBER) | |
7225 | *d++ = '.'; | |
7226 | for (s = p->u.s; (*d = *s++); d++) | |
7227 | ; | |
7228 | } | |
7229 | *d++ = '\0'; | |
7230 | return buffer; | |
7231 | } | |
400fbf9f | 7232 | |
3e4093b6 RS |
7233 | /* Digest the parser output INIT as an initializer for type TYPE. |
7234 | Return a C expression of type TYPE to represent the initial value. | |
7e842ef8 | 7235 | |
bbbbb16a ILT |
7236 | If ORIGTYPE is not NULL_TREE, it is the original type of INIT. |
7237 | ||
928c19bb JM |
7238 | NULL_POINTER_CONSTANT is true if INIT is a null pointer constant. |
7239 | ||
916c5919 JM |
7240 | If INIT is a string constant, STRICT_STRING is true if it is |
7241 | unparenthesized or we should not warn here for it being parenthesized. | |
7242 | For other types of INIT, STRICT_STRING is not used. | |
7243 | ||
c2255bc4 AH |
7244 | INIT_LOC is the location of the INIT. |
7245 | ||
3e4093b6 RS |
7246 | REQUIRE_CONSTANT requests an error if non-constant initializers or |
7247 | elements are seen. */ | |
7e842ef8 | 7248 | |
3e4093b6 | 7249 | static tree |
c2255bc4 AH |
7250 | digest_init (location_t init_loc, tree type, tree init, tree origtype, |
7251 | bool null_pointer_constant, bool strict_string, | |
7252 | int require_constant) | |
3e4093b6 RS |
7253 | { |
7254 | enum tree_code code = TREE_CODE (type); | |
7255 | tree inside_init = init; | |
8ce94e44 | 7256 | tree semantic_type = NULL_TREE; |
928c19bb | 7257 | bool maybe_const = true; |
7e842ef8 | 7258 | |
3e4093b6 | 7259 | if (type == error_mark_node |
f01da1a5 | 7260 | || !init |
7a0ca710 | 7261 | || error_operand_p (init)) |
3e4093b6 | 7262 | return error_mark_node; |
7e842ef8 | 7263 | |
ed248cf7 | 7264 | STRIP_TYPE_NOPS (inside_init); |
7e842ef8 | 7265 | |
8ce94e44 JM |
7266 | if (TREE_CODE (inside_init) == EXCESS_PRECISION_EXPR) |
7267 | { | |
7268 | semantic_type = TREE_TYPE (inside_init); | |
7269 | inside_init = TREE_OPERAND (inside_init, 0); | |
7270 | } | |
928c19bb | 7271 | inside_init = c_fully_fold (inside_init, require_constant, &maybe_const); |
7e842ef8 | 7272 | |
3e4093b6 RS |
7273 | /* Initialization of an array of chars from a string constant |
7274 | optionally enclosed in braces. */ | |
7e842ef8 | 7275 | |
197463ae JM |
7276 | if (code == ARRAY_TYPE && inside_init |
7277 | && TREE_CODE (inside_init) == STRING_CST) | |
3e4093b6 | 7278 | { |
267bac10 JM |
7279 | tree typ1 |
7280 | = (TYPE_ATOMIC (TREE_TYPE (type)) | |
7281 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (TREE_TYPE (type)), | |
7282 | TYPE_QUAL_ATOMIC) | |
7283 | : TYPE_MAIN_VARIANT (TREE_TYPE (type))); | |
197463ae JM |
7284 | /* Note that an array could be both an array of character type |
7285 | and an array of wchar_t if wchar_t is signed char or unsigned | |
7286 | char. */ | |
7287 | bool char_array = (typ1 == char_type_node | |
7288 | || typ1 == signed_char_type_node | |
7289 | || typ1 == unsigned_char_type_node); | |
7290 | bool wchar_array = !!comptypes (typ1, wchar_type_node); | |
c466b2cd KVH |
7291 | bool char16_array = !!comptypes (typ1, char16_type_node); |
7292 | bool char32_array = !!comptypes (typ1, char32_type_node); | |
7293 | ||
7294 | if (char_array || wchar_array || char16_array || char32_array) | |
7e842ef8 | 7295 | { |
916c5919 | 7296 | struct c_expr expr; |
c466b2cd | 7297 | tree typ2 = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (inside_init))); |
916c5919 JM |
7298 | expr.value = inside_init; |
7299 | expr.original_code = (strict_string ? STRING_CST : ERROR_MARK); | |
6866c6e8 | 7300 | expr.original_type = NULL; |
d033409e | 7301 | maybe_warn_string_init (init_loc, type, expr); |
916c5919 | 7302 | |
a45e580b | 7303 | if (TYPE_DOMAIN (type) && !TYPE_MAX_VALUE (TYPE_DOMAIN (type))) |
c1771a20 | 7304 | pedwarn_init (init_loc, OPT_Wpedantic, |
a45e580b JM |
7305 | "initialization of a flexible array member"); |
7306 | ||
3e4093b6 | 7307 | if (comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (inside_init)), |
132da1a5 | 7308 | TYPE_MAIN_VARIANT (type))) |
3e4093b6 | 7309 | return inside_init; |
7e842ef8 | 7310 | |
c466b2cd | 7311 | if (char_array) |
3e4093b6 | 7312 | { |
c466b2cd KVH |
7313 | if (typ2 != char_type_node) |
7314 | { | |
ea58ef42 MP |
7315 | error_init (init_loc, "char-array initialized from wide " |
7316 | "string"); | |
c466b2cd KVH |
7317 | return error_mark_node; |
7318 | } | |
3e4093b6 | 7319 | } |
c466b2cd | 7320 | else |
3e4093b6 | 7321 | { |
c466b2cd KVH |
7322 | if (typ2 == char_type_node) |
7323 | { | |
ea58ef42 MP |
7324 | error_init (init_loc, "wide character array initialized " |
7325 | "from non-wide string"); | |
c466b2cd KVH |
7326 | return error_mark_node; |
7327 | } | |
7328 | else if (!comptypes(typ1, typ2)) | |
7329 | { | |
ea58ef42 MP |
7330 | error_init (init_loc, "wide character array initialized " |
7331 | "from incompatible wide string"); | |
c466b2cd KVH |
7332 | return error_mark_node; |
7333 | } | |
7e842ef8 | 7334 | } |
2f6e4e97 | 7335 | |
3e4093b6 | 7336 | TREE_TYPE (inside_init) = type; |
3fa8871b MP |
7337 | if (TYPE_DOMAIN (type) != NULL_TREE |
7338 | && TYPE_SIZE (type) != NULL_TREE | |
5eb4df45 ILT |
7339 | && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST) |
7340 | { | |
7341 | unsigned HOST_WIDE_INT len = TREE_STRING_LENGTH (inside_init); | |
7342 | ||
c466b2cd | 7343 | /* Subtract the size of a single (possibly wide) character |
3e4093b6 RS |
7344 | because it's ok to ignore the terminating null char |
7345 | that is counted in the length of the constant. */ | |
5eb4df45 ILT |
7346 | if (0 > compare_tree_int (TYPE_SIZE_UNIT (type), |
7347 | (len | |
7348 | - (TYPE_PRECISION (typ1) | |
7349 | / BITS_PER_UNIT)))) | |
7350 | pedwarn_init (init_loc, 0, | |
7351 | ("initializer-string for array of chars " | |
7352 | "is too long")); | |
7353 | else if (warn_cxx_compat | |
7354 | && 0 > compare_tree_int (TYPE_SIZE_UNIT (type), len)) | |
7355 | warning_at (init_loc, OPT_Wc___compat, | |
7356 | ("initializer-string for array chars " | |
7357 | "is too long for C++")); | |
7358 | } | |
7e842ef8 | 7359 | |
3e4093b6 | 7360 | return inside_init; |
7e842ef8 | 7361 | } |
197463ae JM |
7362 | else if (INTEGRAL_TYPE_P (typ1)) |
7363 | { | |
ea58ef42 | 7364 | error_init (init_loc, "array of inappropriate type initialized " |
197463ae JM |
7365 | "from string constant"); |
7366 | return error_mark_node; | |
7367 | } | |
7e842ef8 PE |
7368 | } |
7369 | ||
3e4093b6 RS |
7370 | /* Build a VECTOR_CST from a *constant* vector constructor. If the |
7371 | vector constructor is not constant (e.g. {1,2,3,foo()}) then punt | |
7372 | below and handle as a constructor. */ | |
e89be13b | 7373 | if (code == VECTOR_TYPE |
31521951 | 7374 | && VECTOR_TYPE_P (TREE_TYPE (inside_init)) |
00c8e9f6 | 7375 | && vector_types_convertible_p (TREE_TYPE (inside_init), type, true) |
e89be13b JJ |
7376 | && TREE_CONSTANT (inside_init)) |
7377 | { | |
7378 | if (TREE_CODE (inside_init) == VECTOR_CST | |
7379 | && comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (inside_init)), | |
7380 | TYPE_MAIN_VARIANT (type))) | |
7381 | return inside_init; | |
7382 | ||
7383 | if (TREE_CODE (inside_init) == CONSTRUCTOR) | |
7384 | { | |
4038c495 GB |
7385 | unsigned HOST_WIDE_INT ix; |
7386 | tree value; | |
7387 | bool constant_p = true; | |
e89be13b JJ |
7388 | |
7389 | /* Iterate through elements and check if all constructor | |
7390 | elements are *_CSTs. */ | |
4038c495 GB |
7391 | FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (inside_init), ix, value) |
7392 | if (!CONSTANT_CLASS_P (value)) | |
7393 | { | |
7394 | constant_p = false; | |
7395 | break; | |
7396 | } | |
e89be13b | 7397 | |
4038c495 GB |
7398 | if (constant_p) |
7399 | return build_vector_from_ctor (type, | |
7400 | CONSTRUCTOR_ELTS (inside_init)); | |
e89be13b JJ |
7401 | } |
7402 | } | |
6035d635 | 7403 | |
ca085fd7 MLI |
7404 | if (warn_sequence_point) |
7405 | verify_sequence_points (inside_init); | |
7406 | ||
3e4093b6 RS |
7407 | /* Any type can be initialized |
7408 | from an expression of the same type, optionally with braces. */ | |
400fbf9f | 7409 | |
3fa8871b | 7410 | if (inside_init && TREE_TYPE (inside_init) != NULL_TREE |
3e4093b6 | 7411 | && (comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (inside_init)), |
132da1a5 | 7412 | TYPE_MAIN_VARIANT (type)) |
3e4093b6 | 7413 | || (code == ARRAY_TYPE |
132da1a5 | 7414 | && comptypes (TREE_TYPE (inside_init), type)) |
3e4093b6 | 7415 | || (code == VECTOR_TYPE |
132da1a5 | 7416 | && comptypes (TREE_TYPE (inside_init), type)) |
3e4093b6 | 7417 | || (code == POINTER_TYPE |
3897f229 | 7418 | && TREE_CODE (TREE_TYPE (inside_init)) == ARRAY_TYPE |
3e4093b6 | 7419 | && comptypes (TREE_TYPE (TREE_TYPE (inside_init)), |
132da1a5 | 7420 | TREE_TYPE (type))))) |
3e4093b6 RS |
7421 | { |
7422 | if (code == POINTER_TYPE) | |
b494fd98 | 7423 | { |
b494fd98 EB |
7424 | if (TREE_CODE (TREE_TYPE (inside_init)) == ARRAY_TYPE) |
7425 | { | |
f2a71bbc JM |
7426 | if (TREE_CODE (inside_init) == STRING_CST |
7427 | || TREE_CODE (inside_init) == COMPOUND_LITERAL_EXPR) | |
c2255bc4 AH |
7428 | inside_init = array_to_pointer_conversion |
7429 | (init_loc, inside_init); | |
f2a71bbc JM |
7430 | else |
7431 | { | |
ea58ef42 | 7432 | error_init (init_loc, "invalid use of non-lvalue array"); |
f2a71bbc JM |
7433 | return error_mark_node; |
7434 | } | |
b494fd98 | 7435 | } |
f2a71bbc | 7436 | } |
b494fd98 | 7437 | |
bae39a73 NS |
7438 | if (code == VECTOR_TYPE) |
7439 | /* Although the types are compatible, we may require a | |
7440 | conversion. */ | |
7441 | inside_init = convert (type, inside_init); | |
3e4093b6 | 7442 | |
ca58211b | 7443 | if (require_constant |
3e4093b6 | 7444 | && TREE_CODE (inside_init) == COMPOUND_LITERAL_EXPR) |
400fbf9f | 7445 | { |
3e4093b6 RS |
7446 | /* As an extension, allow initializing objects with static storage |
7447 | duration with compound literals (which are then treated just as | |
ca58211b PB |
7448 | the brace enclosed list they contain). Also allow this for |
7449 | vectors, as we can only assign them with compound literals. */ | |
7278465e MP |
7450 | if (flag_isoc99 && code != VECTOR_TYPE) |
7451 | pedwarn_init (init_loc, OPT_Wpedantic, "initializer element " | |
7452 | "is not constant"); | |
3e4093b6 RS |
7453 | tree decl = COMPOUND_LITERAL_EXPR_DECL (inside_init); |
7454 | inside_init = DECL_INITIAL (decl); | |
400fbf9f | 7455 | } |
3e4093b6 RS |
7456 | |
7457 | if (code == ARRAY_TYPE && TREE_CODE (inside_init) != STRING_CST | |
7458 | && TREE_CODE (inside_init) != CONSTRUCTOR) | |
400fbf9f | 7459 | { |
ea58ef42 MP |
7460 | error_init (init_loc, "array initialized from non-constant array " |
7461 | "expression"); | |
3e4093b6 | 7462 | return error_mark_node; |
400fbf9f | 7463 | } |
400fbf9f | 7464 | |
c1771a20 | 7465 | /* Compound expressions can only occur here if -Wpedantic or |
3e4093b6 RS |
7466 | -pedantic-errors is specified. In the later case, we always want |
7467 | an error. In the former case, we simply want a warning. */ | |
7468 | if (require_constant && pedantic | |
7469 | && TREE_CODE (inside_init) == COMPOUND_EXPR) | |
7470 | { | |
7471 | inside_init | |
7472 | = valid_compound_expr_initializer (inside_init, | |
7473 | TREE_TYPE (inside_init)); | |
7474 | if (inside_init == error_mark_node) | |
ea58ef42 | 7475 | error_init (init_loc, "initializer element is not constant"); |
2f6e4e97 | 7476 | else |
c1771a20 | 7477 | pedwarn_init (init_loc, OPT_Wpedantic, |
509c9d60 | 7478 | "initializer element is not constant"); |
3e4093b6 RS |
7479 | if (flag_pedantic_errors) |
7480 | inside_init = error_mark_node; | |
7481 | } | |
7482 | else if (require_constant | |
116df786 RH |
7483 | && !initializer_constant_valid_p (inside_init, |
7484 | TREE_TYPE (inside_init))) | |
3e4093b6 | 7485 | { |
ea58ef42 | 7486 | error_init (init_loc, "initializer element is not constant"); |
3e4093b6 | 7487 | inside_init = error_mark_node; |
8b40563c | 7488 | } |
928c19bb | 7489 | else if (require_constant && !maybe_const) |
3aa3c9fc | 7490 | pedwarn_init (init_loc, OPT_Wpedantic, |
928c19bb | 7491 | "initializer element is not a constant expression"); |
f735a153 | 7492 | |
90137d8f | 7493 | /* Added to enable additional -Wsuggest-attribute=format warnings. */ |
8fcef540 | 7494 | if (TREE_CODE (TREE_TYPE (inside_init)) == POINTER_TYPE) |
68fca595 MP |
7495 | inside_init = convert_for_assignment (init_loc, UNKNOWN_LOCATION, |
7496 | type, inside_init, origtype, | |
bbbbb16a | 7497 | ic_init, null_pointer_constant, |
928c19bb | 7498 | NULL_TREE, NULL_TREE, 0); |
3e4093b6 RS |
7499 | return inside_init; |
7500 | } | |
f735a153 | 7501 | |
3e4093b6 | 7502 | /* Handle scalar types, including conversions. */ |
400fbf9f | 7503 | |
ab22c1fa CF |
7504 | if (code == INTEGER_TYPE || code == REAL_TYPE || code == FIXED_POINT_TYPE |
7505 | || code == POINTER_TYPE || code == ENUMERAL_TYPE || code == BOOLEAN_TYPE | |
7506 | || code == COMPLEX_TYPE || code == VECTOR_TYPE) | |
400fbf9f | 7507 | { |
f2a71bbc JM |
7508 | if (TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE |
7509 | && (TREE_CODE (init) == STRING_CST | |
7510 | || TREE_CODE (init) == COMPOUND_LITERAL_EXPR)) | |
c2255bc4 | 7511 | inside_init = init = array_to_pointer_conversion (init_loc, init); |
8ce94e44 JM |
7512 | if (semantic_type) |
7513 | inside_init = build1 (EXCESS_PRECISION_EXPR, semantic_type, | |
7514 | inside_init); | |
3e4093b6 | 7515 | inside_init |
68fca595 MP |
7516 | = convert_for_assignment (init_loc, UNKNOWN_LOCATION, type, |
7517 | inside_init, origtype, ic_init, | |
7518 | null_pointer_constant, NULL_TREE, NULL_TREE, | |
7519 | 0); | |
2f6e4e97 | 7520 | |
3274deff JW |
7521 | /* Check to see if we have already given an error message. */ |
7522 | if (inside_init == error_mark_node) | |
7523 | ; | |
3f75a254 | 7524 | else if (require_constant && !TREE_CONSTANT (inside_init)) |
400fbf9f | 7525 | { |
ea58ef42 | 7526 | error_init (init_loc, "initializer element is not constant"); |
3e4093b6 | 7527 | inside_init = error_mark_node; |
400fbf9f | 7528 | } |
3e4093b6 | 7529 | else if (require_constant |
116df786 RH |
7530 | && !initializer_constant_valid_p (inside_init, |
7531 | TREE_TYPE (inside_init))) | |
400fbf9f | 7532 | { |
ea58ef42 MP |
7533 | error_init (init_loc, "initializer element is not computable at " |
7534 | "load time"); | |
3e4093b6 | 7535 | inside_init = error_mark_node; |
400fbf9f | 7536 | } |
928c19bb | 7537 | else if (require_constant && !maybe_const) |
451b5e48 | 7538 | pedwarn_init (init_loc, OPT_Wpedantic, |
928c19bb | 7539 | "initializer element is not a constant expression"); |
3e4093b6 RS |
7540 | |
7541 | return inside_init; | |
400fbf9f | 7542 | } |
d9fc6069 | 7543 | |
3e4093b6 | 7544 | /* Come here only for records and arrays. */ |
d9fc6069 | 7545 | |
3e4093b6 | 7546 | if (COMPLETE_TYPE_P (type) && TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST) |
d9fc6069 | 7547 | { |
ea58ef42 | 7548 | error_init (init_loc, "variable-sized object may not be initialized"); |
3e4093b6 | 7549 | return error_mark_node; |
d9fc6069 | 7550 | } |
3e4093b6 | 7551 | |
ea58ef42 | 7552 | error_init (init_loc, "invalid initializer"); |
3e4093b6 | 7553 | return error_mark_node; |
d9fc6069 | 7554 | } |
400fbf9f | 7555 | \f |
3e4093b6 | 7556 | /* Handle initializers that use braces. */ |
400fbf9f | 7557 | |
3e4093b6 RS |
7558 | /* Type of object we are accumulating a constructor for. |
7559 | This type is always a RECORD_TYPE, UNION_TYPE or ARRAY_TYPE. */ | |
7560 | static tree constructor_type; | |
400fbf9f | 7561 | |
3e4093b6 RS |
7562 | /* For a RECORD_TYPE or UNION_TYPE, this is the chain of fields |
7563 | left to fill. */ | |
7564 | static tree constructor_fields; | |
400fbf9f | 7565 | |
3e4093b6 RS |
7566 | /* For an ARRAY_TYPE, this is the specified index |
7567 | at which to store the next element we get. */ | |
7568 | static tree constructor_index; | |
400fbf9f | 7569 | |
3e4093b6 RS |
7570 | /* For an ARRAY_TYPE, this is the maximum index. */ |
7571 | static tree constructor_max_index; | |
400fbf9f | 7572 | |
3e4093b6 RS |
7573 | /* For a RECORD_TYPE, this is the first field not yet written out. */ |
7574 | static tree constructor_unfilled_fields; | |
400fbf9f | 7575 | |
3e4093b6 RS |
7576 | /* For an ARRAY_TYPE, this is the index of the first element |
7577 | not yet written out. */ | |
7578 | static tree constructor_unfilled_index; | |
895ea614 | 7579 | |
3e4093b6 RS |
7580 | /* In a RECORD_TYPE, the byte index of the next consecutive field. |
7581 | This is so we can generate gaps between fields, when appropriate. */ | |
7582 | static tree constructor_bit_index; | |
10d5caec | 7583 | |
3e4093b6 RS |
7584 | /* If we are saving up the elements rather than allocating them, |
7585 | this is the list of elements so far (in reverse order, | |
7586 | most recent first). */ | |
9771b263 | 7587 | static vec<constructor_elt, va_gc> *constructor_elements; |
ad47f1e5 | 7588 | |
3e4093b6 RS |
7589 | /* 1 if constructor should be incrementally stored into a constructor chain, |
7590 | 0 if all the elements should be kept in AVL tree. */ | |
7591 | static int constructor_incremental; | |
ad47f1e5 | 7592 | |
3e4093b6 RS |
7593 | /* 1 if so far this constructor's elements are all compile-time constants. */ |
7594 | static int constructor_constant; | |
ad47f1e5 | 7595 | |
3e4093b6 RS |
7596 | /* 1 if so far this constructor's elements are all valid address constants. */ |
7597 | static int constructor_simple; | |
ad47f1e5 | 7598 | |
928c19bb JM |
7599 | /* 1 if this constructor has an element that cannot be part of a |
7600 | constant expression. */ | |
7601 | static int constructor_nonconst; | |
7602 | ||
3e4093b6 RS |
7603 | /* 1 if this constructor is erroneous so far. */ |
7604 | static int constructor_erroneous; | |
d45cf215 | 7605 | |
9bac5cbb G |
7606 | /* 1 if this constructor is the universal zero initializer { 0 }. */ |
7607 | static int constructor_zeroinit; | |
7608 | ||
3e4093b6 RS |
7609 | /* Structure for managing pending initializer elements, organized as an |
7610 | AVL tree. */ | |
d45cf215 | 7611 | |
3e4093b6 | 7612 | struct init_node |
d45cf215 | 7613 | { |
3e4093b6 RS |
7614 | struct init_node *left, *right; |
7615 | struct init_node *parent; | |
7616 | int balance; | |
7617 | tree purpose; | |
7618 | tree value; | |
bbbbb16a | 7619 | tree origtype; |
d45cf215 RS |
7620 | }; |
7621 | ||
3e4093b6 RS |
7622 | /* Tree of pending elements at this constructor level. |
7623 | These are elements encountered out of order | |
7624 | which belong at places we haven't reached yet in actually | |
7625 | writing the output. | |
7626 | Will never hold tree nodes across GC runs. */ | |
7627 | static struct init_node *constructor_pending_elts; | |
d45cf215 | 7628 | |
3e4093b6 RS |
7629 | /* The SPELLING_DEPTH of this constructor. */ |
7630 | static int constructor_depth; | |
d45cf215 | 7631 | |
3e4093b6 RS |
7632 | /* DECL node for which an initializer is being read. |
7633 | 0 means we are reading a constructor expression | |
7634 | such as (struct foo) {...}. */ | |
7635 | static tree constructor_decl; | |
d45cf215 | 7636 | |
3e4093b6 RS |
7637 | /* Nonzero if this is an initializer for a top-level decl. */ |
7638 | static int constructor_top_level; | |
d45cf215 | 7639 | |
3e4093b6 RS |
7640 | /* Nonzero if there were any member designators in this initializer. */ |
7641 | static int constructor_designated; | |
d45cf215 | 7642 | |
3e4093b6 RS |
7643 | /* Nesting depth of designator list. */ |
7644 | static int designator_depth; | |
d45cf215 | 7645 | |
3e4093b6 | 7646 | /* Nonzero if there were diagnosed errors in this designator list. */ |
b06df647 | 7647 | static int designator_erroneous; |
d45cf215 | 7648 | |
3e4093b6 RS |
7649 | \f |
7650 | /* This stack has a level for each implicit or explicit level of | |
7651 | structuring in the initializer, including the outermost one. It | |
7652 | saves the values of most of the variables above. */ | |
d45cf215 | 7653 | |
3e4093b6 RS |
7654 | struct constructor_range_stack; |
7655 | ||
7656 | struct constructor_stack | |
d45cf215 | 7657 | { |
3e4093b6 RS |
7658 | struct constructor_stack *next; |
7659 | tree type; | |
7660 | tree fields; | |
7661 | tree index; | |
7662 | tree max_index; | |
7663 | tree unfilled_index; | |
7664 | tree unfilled_fields; | |
7665 | tree bit_index; | |
9771b263 | 7666 | vec<constructor_elt, va_gc> *elements; |
3e4093b6 RS |
7667 | struct init_node *pending_elts; |
7668 | int offset; | |
7669 | int depth; | |
916c5919 | 7670 | /* If value nonzero, this value should replace the entire |
3e4093b6 | 7671 | constructor at this level. */ |
916c5919 | 7672 | struct c_expr replacement_value; |
3e4093b6 RS |
7673 | struct constructor_range_stack *range_stack; |
7674 | char constant; | |
7675 | char simple; | |
928c19bb | 7676 | char nonconst; |
3e4093b6 RS |
7677 | char implicit; |
7678 | char erroneous; | |
7679 | char outer; | |
7680 | char incremental; | |
7681 | char designated; | |
976d5a22 | 7682 | int designator_depth; |
3e4093b6 | 7683 | }; |
d45cf215 | 7684 | |
802415d1 | 7685 | static struct constructor_stack *constructor_stack; |
d45cf215 | 7686 | |
3e4093b6 RS |
7687 | /* This stack represents designators from some range designator up to |
7688 | the last designator in the list. */ | |
d45cf215 | 7689 | |
3e4093b6 RS |
7690 | struct constructor_range_stack |
7691 | { | |
7692 | struct constructor_range_stack *next, *prev; | |
7693 | struct constructor_stack *stack; | |
7694 | tree range_start; | |
7695 | tree index; | |
7696 | tree range_end; | |
7697 | tree fields; | |
7698 | }; | |
d45cf215 | 7699 | |
802415d1 | 7700 | static struct constructor_range_stack *constructor_range_stack; |
d45cf215 | 7701 | |
3e4093b6 RS |
7702 | /* This stack records separate initializers that are nested. |
7703 | Nested initializers can't happen in ANSI C, but GNU C allows them | |
7704 | in cases like { ... (struct foo) { ... } ... }. */ | |
d45cf215 | 7705 | |
3e4093b6 | 7706 | struct initializer_stack |
d45cf215 | 7707 | { |
3e4093b6 RS |
7708 | struct initializer_stack *next; |
7709 | tree decl; | |
3e4093b6 RS |
7710 | struct constructor_stack *constructor_stack; |
7711 | struct constructor_range_stack *constructor_range_stack; | |
9771b263 | 7712 | vec<constructor_elt, va_gc> *elements; |
3e4093b6 RS |
7713 | struct spelling *spelling; |
7714 | struct spelling *spelling_base; | |
7715 | int spelling_size; | |
7716 | char top_level; | |
7717 | char require_constant_value; | |
7718 | char require_constant_elements; | |
5dd9a9d0 | 7719 | rich_location *missing_brace_richloc; |
3e4093b6 | 7720 | }; |
d45cf215 | 7721 | |
802415d1 | 7722 | static struct initializer_stack *initializer_stack; |
3e4093b6 RS |
7723 | \f |
7724 | /* Prepare to parse and output the initializer for variable DECL. */ | |
400fbf9f JW |
7725 | |
7726 | void | |
5dd9a9d0 DM |
7727 | start_init (tree decl, tree asmspec_tree ATTRIBUTE_UNUSED, int top_level, |
7728 | rich_location *richloc) | |
400fbf9f | 7729 | { |
3e4093b6 | 7730 | const char *locus; |
cceb1885 | 7731 | struct initializer_stack *p = XNEW (struct initializer_stack); |
400fbf9f | 7732 | |
3e4093b6 | 7733 | p->decl = constructor_decl; |
3e4093b6 RS |
7734 | p->require_constant_value = require_constant_value; |
7735 | p->require_constant_elements = require_constant_elements; | |
7736 | p->constructor_stack = constructor_stack; | |
7737 | p->constructor_range_stack = constructor_range_stack; | |
7738 | p->elements = constructor_elements; | |
7739 | p->spelling = spelling; | |
7740 | p->spelling_base = spelling_base; | |
7741 | p->spelling_size = spelling_size; | |
7742 | p->top_level = constructor_top_level; | |
7743 | p->next = initializer_stack; | |
5dd9a9d0 | 7744 | p->missing_brace_richloc = richloc; |
3e4093b6 | 7745 | initializer_stack = p; |
400fbf9f | 7746 | |
3e4093b6 | 7747 | constructor_decl = decl; |
3e4093b6 RS |
7748 | constructor_designated = 0; |
7749 | constructor_top_level = top_level; | |
400fbf9f | 7750 | |
3fa8871b | 7751 | if (decl != NULL_TREE && decl != error_mark_node) |
3e4093b6 RS |
7752 | { |
7753 | require_constant_value = TREE_STATIC (decl); | |
7754 | require_constant_elements | |
7755 | = ((TREE_STATIC (decl) || (pedantic && !flag_isoc99)) | |
7756 | /* For a scalar, you can always use any value to initialize, | |
7757 | even within braces. */ | |
296a8c2f | 7758 | && AGGREGATE_TYPE_P (TREE_TYPE (decl))); |
88388a52 | 7759 | locus = identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))); |
3e4093b6 RS |
7760 | } |
7761 | else | |
7762 | { | |
7763 | require_constant_value = 0; | |
7764 | require_constant_elements = 0; | |
88388a52 | 7765 | locus = _("(anonymous)"); |
3e4093b6 | 7766 | } |
b71c7f8a | 7767 | |
3e4093b6 RS |
7768 | constructor_stack = 0; |
7769 | constructor_range_stack = 0; | |
b71c7f8a | 7770 | |
9bac5cbb | 7771 | found_missing_braces = 0; |
3e4093b6 RS |
7772 | |
7773 | spelling_base = 0; | |
7774 | spelling_size = 0; | |
7775 | RESTORE_SPELLING_DEPTH (0); | |
7776 | ||
7777 | if (locus) | |
7778 | push_string (locus); | |
7779 | } | |
7780 | ||
7781 | void | |
7782 | finish_init (void) | |
b71c7f8a | 7783 | { |
3e4093b6 | 7784 | struct initializer_stack *p = initializer_stack; |
b71c7f8a | 7785 | |
3e4093b6 RS |
7786 | /* Free the whole constructor stack of this initializer. */ |
7787 | while (constructor_stack) | |
7788 | { | |
7789 | struct constructor_stack *q = constructor_stack; | |
7790 | constructor_stack = q->next; | |
7791 | free (q); | |
7792 | } | |
7793 | ||
366de0ce | 7794 | gcc_assert (!constructor_range_stack); |
3e4093b6 RS |
7795 | |
7796 | /* Pop back to the data of the outer initializer (if any). */ | |
36579663 | 7797 | free (spelling_base); |
3aeb3655 | 7798 | |
3e4093b6 | 7799 | constructor_decl = p->decl; |
3e4093b6 RS |
7800 | require_constant_value = p->require_constant_value; |
7801 | require_constant_elements = p->require_constant_elements; | |
7802 | constructor_stack = p->constructor_stack; | |
7803 | constructor_range_stack = p->constructor_range_stack; | |
7804 | constructor_elements = p->elements; | |
7805 | spelling = p->spelling; | |
7806 | spelling_base = p->spelling_base; | |
7807 | spelling_size = p->spelling_size; | |
7808 | constructor_top_level = p->top_level; | |
7809 | initializer_stack = p->next; | |
7810 | free (p); | |
b71c7f8a | 7811 | } |
400fbf9f | 7812 | \f |
3e4093b6 RS |
7813 | /* Call here when we see the initializer is surrounded by braces. |
7814 | This is instead of a call to push_init_level; | |
7815 | it is matched by a call to pop_init_level. | |
400fbf9f | 7816 | |
3e4093b6 RS |
7817 | TYPE is the type to initialize, for a constructor expression. |
7818 | For an initializer for a decl, TYPE is zero. */ | |
400fbf9f | 7819 | |
3e4093b6 RS |
7820 | void |
7821 | really_start_incremental_init (tree type) | |
400fbf9f | 7822 | { |
5d038c4c | 7823 | struct constructor_stack *p = XNEW (struct constructor_stack); |
400fbf9f | 7824 | |
3fa8871b | 7825 | if (type == NULL_TREE) |
3e4093b6 | 7826 | type = TREE_TYPE (constructor_decl); |
400fbf9f | 7827 | |
31521951 | 7828 | if (VECTOR_TYPE_P (type) |
b6fc2cdb | 7829 | && TYPE_VECTOR_OPAQUE (type)) |
3e4093b6 | 7830 | error ("opaque vector types cannot be initialized"); |
400fbf9f | 7831 | |
3e4093b6 RS |
7832 | p->type = constructor_type; |
7833 | p->fields = constructor_fields; | |
7834 | p->index = constructor_index; | |
7835 | p->max_index = constructor_max_index; | |
7836 | p->unfilled_index = constructor_unfilled_index; | |
7837 | p->unfilled_fields = constructor_unfilled_fields; | |
7838 | p->bit_index = constructor_bit_index; | |
7839 | p->elements = constructor_elements; | |
7840 | p->constant = constructor_constant; | |
7841 | p->simple = constructor_simple; | |
928c19bb | 7842 | p->nonconst = constructor_nonconst; |
3e4093b6 RS |
7843 | p->erroneous = constructor_erroneous; |
7844 | p->pending_elts = constructor_pending_elts; | |
7845 | p->depth = constructor_depth; | |
916c5919 JM |
7846 | p->replacement_value.value = 0; |
7847 | p->replacement_value.original_code = ERROR_MARK; | |
6866c6e8 | 7848 | p->replacement_value.original_type = NULL; |
3e4093b6 RS |
7849 | p->implicit = 0; |
7850 | p->range_stack = 0; | |
7851 | p->outer = 0; | |
7852 | p->incremental = constructor_incremental; | |
7853 | p->designated = constructor_designated; | |
976d5a22 | 7854 | p->designator_depth = designator_depth; |
3e4093b6 RS |
7855 | p->next = 0; |
7856 | constructor_stack = p; | |
b13aca19 | 7857 | |
3e4093b6 RS |
7858 | constructor_constant = 1; |
7859 | constructor_simple = 1; | |
928c19bb | 7860 | constructor_nonconst = 0; |
3e4093b6 | 7861 | constructor_depth = SPELLING_DEPTH (); |
9771b263 | 7862 | constructor_elements = NULL; |
3e4093b6 RS |
7863 | constructor_pending_elts = 0; |
7864 | constructor_type = type; | |
7865 | constructor_incremental = 1; | |
7866 | constructor_designated = 0; | |
9bac5cbb | 7867 | constructor_zeroinit = 1; |
3e4093b6 | 7868 | designator_depth = 0; |
b06df647 | 7869 | designator_erroneous = 0; |
400fbf9f | 7870 | |
3e636daf | 7871 | if (RECORD_OR_UNION_TYPE_P (constructor_type)) |
400fbf9f | 7872 | { |
3e4093b6 RS |
7873 | constructor_fields = TYPE_FIELDS (constructor_type); |
7874 | /* Skip any nameless bit fields at the beginning. */ | |
3fa8871b MP |
7875 | while (constructor_fields != NULL_TREE |
7876 | && DECL_C_BIT_FIELD (constructor_fields) | |
7877 | && DECL_NAME (constructor_fields) == NULL_TREE) | |
910ad8de | 7878 | constructor_fields = DECL_CHAIN (constructor_fields); |
05bccae2 | 7879 | |
3e4093b6 RS |
7880 | constructor_unfilled_fields = constructor_fields; |
7881 | constructor_bit_index = bitsize_zero_node; | |
400fbf9f | 7882 | } |
3e4093b6 RS |
7883 | else if (TREE_CODE (constructor_type) == ARRAY_TYPE) |
7884 | { | |
7885 | if (TYPE_DOMAIN (constructor_type)) | |
7886 | { | |
7887 | constructor_max_index | |
7888 | = TYPE_MAX_VALUE (TYPE_DOMAIN (constructor_type)); | |
400fbf9f | 7889 | |
3e4093b6 RS |
7890 | /* Detect non-empty initializations of zero-length arrays. */ |
7891 | if (constructor_max_index == NULL_TREE | |
7892 | && TYPE_SIZE (constructor_type)) | |
9a9d280e | 7893 | constructor_max_index = integer_minus_one_node; |
400fbf9f | 7894 | |
3e4093b6 RS |
7895 | /* constructor_max_index needs to be an INTEGER_CST. Attempts |
7896 | to initialize VLAs will cause a proper error; avoid tree | |
7897 | checking errors as well by setting a safe value. */ | |
7898 | if (constructor_max_index | |
7899 | && TREE_CODE (constructor_max_index) != INTEGER_CST) | |
9a9d280e | 7900 | constructor_max_index = integer_minus_one_node; |
59c83dbf | 7901 | |
3e4093b6 RS |
7902 | constructor_index |
7903 | = convert (bitsizetype, | |
7904 | TYPE_MIN_VALUE (TYPE_DOMAIN (constructor_type))); | |
59c83dbf | 7905 | } |
3e4093b6 | 7906 | else |
493179da JM |
7907 | { |
7908 | constructor_index = bitsize_zero_node; | |
7909 | constructor_max_index = NULL_TREE; | |
7910 | } | |
59c83dbf | 7911 | |
3e4093b6 RS |
7912 | constructor_unfilled_index = constructor_index; |
7913 | } | |
31521951 | 7914 | else if (VECTOR_TYPE_P (constructor_type)) |
3e4093b6 RS |
7915 | { |
7916 | /* Vectors are like simple fixed-size arrays. */ | |
7917 | constructor_max_index = | |
c62c040f | 7918 | bitsize_int (TYPE_VECTOR_SUBPARTS (constructor_type) - 1); |
a0f0ab9f | 7919 | constructor_index = bitsize_zero_node; |
3e4093b6 RS |
7920 | constructor_unfilled_index = constructor_index; |
7921 | } | |
7922 | else | |
7923 | { | |
7924 | /* Handle the case of int x = {5}; */ | |
7925 | constructor_fields = constructor_type; | |
7926 | constructor_unfilled_fields = constructor_type; | |
7927 | } | |
7928 | } | |
7929 | \f | |
5dd9a9d0 DM |
7930 | extern location_t last_init_list_comma; |
7931 | ||
16595a1f BS |
7932 | /* Called when we see an open brace for a nested initializer. Finish |
7933 | off any pending levels with implicit braces. */ | |
7934 | void | |
7935 | finish_implicit_inits (location_t loc, struct obstack *braced_init_obstack) | |
7936 | { | |
7937 | while (constructor_stack->implicit) | |
7938 | { | |
7939 | if (RECORD_OR_UNION_TYPE_P (constructor_type) | |
3fa8871b | 7940 | && constructor_fields == NULL_TREE) |
16595a1f | 7941 | process_init_element (input_location, |
5dd9a9d0 DM |
7942 | pop_init_level (loc, 1, braced_init_obstack, |
7943 | last_init_list_comma), | |
16595a1f BS |
7944 | true, braced_init_obstack); |
7945 | else if (TREE_CODE (constructor_type) == ARRAY_TYPE | |
7946 | && constructor_max_index | |
7947 | && tree_int_cst_lt (constructor_max_index, | |
7948 | constructor_index)) | |
7949 | process_init_element (input_location, | |
5dd9a9d0 DM |
7950 | pop_init_level (loc, 1, braced_init_obstack, |
7951 | last_init_list_comma), | |
16595a1f BS |
7952 | true, braced_init_obstack); |
7953 | else | |
7954 | break; | |
7955 | } | |
7956 | } | |
7957 | ||
3e4093b6 RS |
7958 | /* Push down into a subobject, for initialization. |
7959 | If this is for an explicit set of braces, IMPLICIT is 0. | |
7960 | If it is because the next element belongs at a lower level, | |
7961 | IMPLICIT is 1 (or 2 if the push is because of designator list). */ | |
400fbf9f | 7962 | |
3e4093b6 | 7963 | void |
ea58ef42 MP |
7964 | push_init_level (location_t loc, int implicit, |
7965 | struct obstack *braced_init_obstack) | |
3e4093b6 RS |
7966 | { |
7967 | struct constructor_stack *p; | |
7968 | tree value = NULL_TREE; | |
400fbf9f | 7969 | |
3e4093b6 RS |
7970 | /* Unless this is an explicit brace, we need to preserve previous |
7971 | content if any. */ | |
7972 | if (implicit) | |
7973 | { | |
3e636daf | 7974 | if (RECORD_OR_UNION_TYPE_P (constructor_type) && constructor_fields) |
a1e3b3d9 | 7975 | value = find_init_member (constructor_fields, braced_init_obstack); |
3e4093b6 | 7976 | else if (TREE_CODE (constructor_type) == ARRAY_TYPE) |
a1e3b3d9 | 7977 | value = find_init_member (constructor_index, braced_init_obstack); |
400fbf9f JW |
7978 | } |
7979 | ||
5d038c4c | 7980 | p = XNEW (struct constructor_stack); |
3e4093b6 RS |
7981 | p->type = constructor_type; |
7982 | p->fields = constructor_fields; | |
7983 | p->index = constructor_index; | |
7984 | p->max_index = constructor_max_index; | |
7985 | p->unfilled_index = constructor_unfilled_index; | |
7986 | p->unfilled_fields = constructor_unfilled_fields; | |
7987 | p->bit_index = constructor_bit_index; | |
7988 | p->elements = constructor_elements; | |
7989 | p->constant = constructor_constant; | |
7990 | p->simple = constructor_simple; | |
928c19bb | 7991 | p->nonconst = constructor_nonconst; |
3e4093b6 RS |
7992 | p->erroneous = constructor_erroneous; |
7993 | p->pending_elts = constructor_pending_elts; | |
7994 | p->depth = constructor_depth; | |
3fa8871b | 7995 | p->replacement_value.value = NULL_TREE; |
916c5919 | 7996 | p->replacement_value.original_code = ERROR_MARK; |
6866c6e8 | 7997 | p->replacement_value.original_type = NULL; |
3e4093b6 RS |
7998 | p->implicit = implicit; |
7999 | p->outer = 0; | |
8000 | p->incremental = constructor_incremental; | |
8001 | p->designated = constructor_designated; | |
976d5a22 | 8002 | p->designator_depth = designator_depth; |
3e4093b6 RS |
8003 | p->next = constructor_stack; |
8004 | p->range_stack = 0; | |
8005 | constructor_stack = p; | |
400fbf9f | 8006 | |
3e4093b6 RS |
8007 | constructor_constant = 1; |
8008 | constructor_simple = 1; | |
928c19bb | 8009 | constructor_nonconst = 0; |
3e4093b6 | 8010 | constructor_depth = SPELLING_DEPTH (); |
9771b263 | 8011 | constructor_elements = NULL; |
3e4093b6 RS |
8012 | constructor_incremental = 1; |
8013 | constructor_designated = 0; | |
8014 | constructor_pending_elts = 0; | |
8015 | if (!implicit) | |
400fbf9f | 8016 | { |
3e4093b6 RS |
8017 | p->range_stack = constructor_range_stack; |
8018 | constructor_range_stack = 0; | |
8019 | designator_depth = 0; | |
b06df647 | 8020 | designator_erroneous = 0; |
3e4093b6 | 8021 | } |
400fbf9f | 8022 | |
3e4093b6 RS |
8023 | /* Don't die if an entire brace-pair level is superfluous |
8024 | in the containing level. */ | |
3fa8871b | 8025 | if (constructor_type == NULL_TREE) |
3e4093b6 | 8026 | ; |
3e636daf | 8027 | else if (RECORD_OR_UNION_TYPE_P (constructor_type)) |
3e4093b6 RS |
8028 | { |
8029 | /* Don't die if there are extra init elts at the end. */ | |
3fa8871b MP |
8030 | if (constructor_fields == NULL_TREE) |
8031 | constructor_type = NULL_TREE; | |
3e4093b6 | 8032 | else |
400fbf9f | 8033 | { |
3e4093b6 RS |
8034 | constructor_type = TREE_TYPE (constructor_fields); |
8035 | push_member_name (constructor_fields); | |
8036 | constructor_depth++; | |
400fbf9f | 8037 | } |
6a358dcb MP |
8038 | /* If upper initializer is designated, then mark this as |
8039 | designated too to prevent bogus warnings. */ | |
8040 | constructor_designated = p->designated; | |
3e4093b6 RS |
8041 | } |
8042 | else if (TREE_CODE (constructor_type) == ARRAY_TYPE) | |
8043 | { | |
8044 | constructor_type = TREE_TYPE (constructor_type); | |
ae7e9ddd | 8045 | push_array_bounds (tree_to_uhwi (constructor_index)); |
3e4093b6 | 8046 | constructor_depth++; |
400fbf9f JW |
8047 | } |
8048 | ||
3fa8871b | 8049 | if (constructor_type == NULL_TREE) |
400fbf9f | 8050 | { |
ea58ef42 | 8051 | error_init (loc, "extra brace group at end of initializer"); |
3fa8871b MP |
8052 | constructor_fields = NULL_TREE; |
8053 | constructor_unfilled_fields = NULL_TREE; | |
3e4093b6 | 8054 | return; |
400fbf9f JW |
8055 | } |
8056 | ||
3e4093b6 RS |
8057 | if (value && TREE_CODE (value) == CONSTRUCTOR) |
8058 | { | |
8059 | constructor_constant = TREE_CONSTANT (value); | |
8060 | constructor_simple = TREE_STATIC (value); | |
928c19bb | 8061 | constructor_nonconst = CONSTRUCTOR_NON_CONST (value); |
3e4093b6 | 8062 | constructor_elements = CONSTRUCTOR_ELTS (value); |
9771b263 | 8063 | if (!vec_safe_is_empty (constructor_elements) |
3e4093b6 RS |
8064 | && (TREE_CODE (constructor_type) == RECORD_TYPE |
8065 | || TREE_CODE (constructor_type) == ARRAY_TYPE)) | |
a1e3b3d9 | 8066 | set_nonincremental_init (braced_init_obstack); |
3e4093b6 | 8067 | } |
400fbf9f | 8068 | |
9bac5cbb | 8069 | if (implicit == 1) |
5dd9a9d0 DM |
8070 | { |
8071 | found_missing_braces = 1; | |
8072 | if (initializer_stack->missing_brace_richloc) | |
8073 | initializer_stack->missing_brace_richloc->add_fixit_insert_before | |
8074 | (loc, "{"); | |
8075 | } | |
400fbf9f | 8076 | |
3e636daf | 8077 | if (RECORD_OR_UNION_TYPE_P (constructor_type)) |
3e4093b6 RS |
8078 | { |
8079 | constructor_fields = TYPE_FIELDS (constructor_type); | |
8080 | /* Skip any nameless bit fields at the beginning. */ | |
3fa8871b MP |
8081 | while (constructor_fields != NULL_TREE |
8082 | && DECL_C_BIT_FIELD (constructor_fields) | |
8083 | && DECL_NAME (constructor_fields) == NULL_TREE) | |
f7587ed0 | 8084 | constructor_fields = DECL_CHAIN (constructor_fields); |
103b7b17 | 8085 | |
3e4093b6 RS |
8086 | constructor_unfilled_fields = constructor_fields; |
8087 | constructor_bit_index = bitsize_zero_node; | |
8088 | } | |
31521951 | 8089 | else if (VECTOR_TYPE_P (constructor_type)) |
3e4093b6 RS |
8090 | { |
8091 | /* Vectors are like simple fixed-size arrays. */ | |
8092 | constructor_max_index = | |
c62c040f RG |
8093 | bitsize_int (TYPE_VECTOR_SUBPARTS (constructor_type) - 1); |
8094 | constructor_index = bitsize_int (0); | |
3e4093b6 RS |
8095 | constructor_unfilled_index = constructor_index; |
8096 | } | |
8097 | else if (TREE_CODE (constructor_type) == ARRAY_TYPE) | |
8098 | { | |
8099 | if (TYPE_DOMAIN (constructor_type)) | |
8100 | { | |
8101 | constructor_max_index | |
8102 | = TYPE_MAX_VALUE (TYPE_DOMAIN (constructor_type)); | |
400fbf9f | 8103 | |
3e4093b6 RS |
8104 | /* Detect non-empty initializations of zero-length arrays. */ |
8105 | if (constructor_max_index == NULL_TREE | |
8106 | && TYPE_SIZE (constructor_type)) | |
9a9d280e | 8107 | constructor_max_index = integer_minus_one_node; |
de520661 | 8108 | |
3e4093b6 RS |
8109 | /* constructor_max_index needs to be an INTEGER_CST. Attempts |
8110 | to initialize VLAs will cause a proper error; avoid tree | |
8111 | checking errors as well by setting a safe value. */ | |
8112 | if (constructor_max_index | |
8113 | && TREE_CODE (constructor_max_index) != INTEGER_CST) | |
9a9d280e | 8114 | constructor_max_index = integer_minus_one_node; |
b62acd60 | 8115 | |
3e4093b6 RS |
8116 | constructor_index |
8117 | = convert (bitsizetype, | |
8118 | TYPE_MIN_VALUE (TYPE_DOMAIN (constructor_type))); | |
8119 | } | |
8120 | else | |
8121 | constructor_index = bitsize_zero_node; | |
de520661 | 8122 | |
3e4093b6 RS |
8123 | constructor_unfilled_index = constructor_index; |
8124 | if (value && TREE_CODE (value) == STRING_CST) | |
8125 | { | |
8126 | /* We need to split the char/wchar array into individual | |
8127 | characters, so that we don't have to special case it | |
8128 | everywhere. */ | |
a1e3b3d9 | 8129 | set_nonincremental_init_from_string (value, braced_init_obstack); |
3e4093b6 RS |
8130 | } |
8131 | } | |
8132 | else | |
8133 | { | |
b4519d39 | 8134 | if (constructor_type != error_mark_node) |
96b40f8d | 8135 | warning_init (input_location, 0, "braces around scalar initializer"); |
3e4093b6 RS |
8136 | constructor_fields = constructor_type; |
8137 | constructor_unfilled_fields = constructor_type; | |
8138 | } | |
8139 | } | |
8b6a5902 | 8140 | |
3e4093b6 | 8141 | /* At the end of an implicit or explicit brace level, |
916c5919 JM |
8142 | finish up that level of constructor. If a single expression |
8143 | with redundant braces initialized that level, return the | |
8144 | c_expr structure for that expression. Otherwise, the original_code | |
8145 | element is set to ERROR_MARK. | |
8146 | If we were outputting the elements as they are read, return 0 as the value | |
3e4093b6 | 8147 | from inner levels (process_init_element ignores that), |
916c5919 | 8148 | but return error_mark_node as the value from the outermost level |
3e4093b6 | 8149 | (that's what we want to put in DECL_INITIAL). |
916c5919 | 8150 | Otherwise, return a CONSTRUCTOR expression as the value. */ |
de520661 | 8151 | |
916c5919 | 8152 | struct c_expr |
ea58ef42 | 8153 | pop_init_level (location_t loc, int implicit, |
5dd9a9d0 DM |
8154 | struct obstack *braced_init_obstack, |
8155 | location_t insert_before) | |
3e4093b6 RS |
8156 | { |
8157 | struct constructor_stack *p; | |
916c5919 | 8158 | struct c_expr ret; |
3fa8871b | 8159 | ret.value = NULL_TREE; |
916c5919 | 8160 | ret.original_code = ERROR_MARK; |
6866c6e8 | 8161 | ret.original_type = NULL; |
de520661 | 8162 | |
3e4093b6 RS |
8163 | if (implicit == 0) |
8164 | { | |
8165 | /* When we come to an explicit close brace, | |
8166 | pop any inner levels that didn't have explicit braces. */ | |
8167 | while (constructor_stack->implicit) | |
34cf811f | 8168 | process_init_element (input_location, |
5dd9a9d0 DM |
8169 | pop_init_level (loc, 1, braced_init_obstack, |
8170 | insert_before), | |
34cf811f | 8171 | true, braced_init_obstack); |
366de0ce | 8172 | gcc_assert (!constructor_range_stack); |
3e4093b6 | 8173 | } |
5dd9a9d0 DM |
8174 | else |
8175 | if (initializer_stack->missing_brace_richloc) | |
8176 | initializer_stack->missing_brace_richloc->add_fixit_insert_before | |
8177 | (insert_before, "}"); | |
e5e809f4 | 8178 | |
0066ef9c RH |
8179 | /* Now output all pending elements. */ |
8180 | constructor_incremental = 1; | |
a1e3b3d9 | 8181 | output_pending_init_elements (1, braced_init_obstack); |
0066ef9c | 8182 | |
3e4093b6 | 8183 | p = constructor_stack; |
e5e809f4 | 8184 | |
3e4093b6 RS |
8185 | /* Error for initializing a flexible array member, or a zero-length |
8186 | array member in an inappropriate context. */ | |
8187 | if (constructor_type && constructor_fields | |
8188 | && TREE_CODE (constructor_type) == ARRAY_TYPE | |
8189 | && TYPE_DOMAIN (constructor_type) | |
3f75a254 | 8190 | && !TYPE_MAX_VALUE (TYPE_DOMAIN (constructor_type))) |
3e4093b6 RS |
8191 | { |
8192 | /* Silently discard empty initializations. The parser will | |
8193 | already have pedwarned for empty brackets. */ | |
8194 | if (integer_zerop (constructor_unfilled_index)) | |
8195 | constructor_type = NULL_TREE; | |
366de0ce | 8196 | else |
3e4093b6 | 8197 | { |
366de0ce | 8198 | gcc_assert (!TYPE_SIZE (constructor_type)); |
c22cacf3 | 8199 | |
3e4093b6 | 8200 | if (constructor_depth > 2) |
ea58ef42 | 8201 | error_init (loc, "initialization of flexible array member in a nested context"); |
fcf73884 | 8202 | else |
d033409e | 8203 | pedwarn_init (loc, OPT_Wpedantic, |
509c9d60 | 8204 | "initialization of a flexible array member"); |
de520661 | 8205 | |
3e4093b6 RS |
8206 | /* We have already issued an error message for the existence |
8207 | of a flexible array member not at the end of the structure. | |
535a42b1 | 8208 | Discard the initializer so that we do not die later. */ |
910ad8de | 8209 | if (DECL_CHAIN (constructor_fields) != NULL_TREE) |
3e4093b6 RS |
8210 | constructor_type = NULL_TREE; |
8211 | } | |
3e4093b6 | 8212 | } |
de520661 | 8213 | |
7b33f0c8 MP |
8214 | switch (vec_safe_length (constructor_elements)) |
8215 | { | |
8216 | case 0: | |
8217 | /* Initialization with { } counts as zeroinit. */ | |
8218 | constructor_zeroinit = 1; | |
8219 | break; | |
8220 | case 1: | |
8221 | /* This might be zeroinit as well. */ | |
8222 | if (integer_zerop ((*constructor_elements)[0].value)) | |
8223 | constructor_zeroinit = 1; | |
8224 | break; | |
8225 | default: | |
8226 | /* If the constructor has more than one element, it can't be { 0 }. */ | |
8227 | constructor_zeroinit = 0; | |
8228 | break; | |
8229 | } | |
9bac5cbb G |
8230 | |
8231 | /* Warn when some structs are initialized with direct aggregation. */ | |
8232 | if (!implicit && found_missing_braces && warn_missing_braces | |
8233 | && !constructor_zeroinit) | |
5dd9a9d0 DM |
8234 | { |
8235 | gcc_assert (initializer_stack->missing_brace_richloc); | |
64a5912c DM |
8236 | warning_at (initializer_stack->missing_brace_richloc, |
8237 | OPT_Wmissing_braces, | |
8238 | "missing braces around initializer"); | |
5dd9a9d0 | 8239 | } |
9bac5cbb | 8240 | |
3e4093b6 | 8241 | /* Warn when some struct elements are implicitly initialized to zero. */ |
eaac4679 | 8242 | if (warn_missing_field_initializers |
3e4093b6 RS |
8243 | && constructor_type |
8244 | && TREE_CODE (constructor_type) == RECORD_TYPE | |
8245 | && constructor_unfilled_fields) | |
8246 | { | |
8247 | /* Do not warn for flexible array members or zero-length arrays. */ | |
8248 | while (constructor_unfilled_fields | |
3f75a254 | 8249 | && (!DECL_SIZE (constructor_unfilled_fields) |
3e4093b6 | 8250 | || integer_zerop (DECL_SIZE (constructor_unfilled_fields)))) |
910ad8de | 8251 | constructor_unfilled_fields = DECL_CHAIN (constructor_unfilled_fields); |
cc77d4d5 | 8252 | |
49819fef AM |
8253 | if (constructor_unfilled_fields |
8254 | /* Do not warn if this level of the initializer uses member | |
8255 | designators; it is likely to be deliberate. */ | |
8256 | && !constructor_designated | |
84937de2 | 8257 | /* Do not warn about initializing with { 0 } or with { }. */ |
49819fef | 8258 | && !constructor_zeroinit) |
3e4093b6 | 8259 | { |
32397f22 MLI |
8260 | if (warning_at (input_location, OPT_Wmissing_field_initializers, |
8261 | "missing initializer for field %qD of %qT", | |
8262 | constructor_unfilled_fields, | |
8263 | constructor_type)) | |
8264 | inform (DECL_SOURCE_LOCATION (constructor_unfilled_fields), | |
ae933128 | 8265 | "%qD declared here", constructor_unfilled_fields); |
3e4093b6 RS |
8266 | } |
8267 | } | |
de520661 | 8268 | |
3e4093b6 | 8269 | /* Pad out the end of the structure. */ |
916c5919 | 8270 | if (p->replacement_value.value) |
3e4093b6 RS |
8271 | /* If this closes a superfluous brace pair, |
8272 | just pass out the element between them. */ | |
916c5919 | 8273 | ret = p->replacement_value; |
3fa8871b | 8274 | else if (constructor_type == NULL_TREE) |
3e4093b6 | 8275 | ; |
3e636daf | 8276 | else if (!RECORD_OR_UNION_TYPE_P (constructor_type) |
3e4093b6 | 8277 | && TREE_CODE (constructor_type) != ARRAY_TYPE |
31521951 | 8278 | && !VECTOR_TYPE_P (constructor_type)) |
3e4093b6 RS |
8279 | { |
8280 | /* A nonincremental scalar initializer--just return | |
8281 | the element, after verifying there is just one. */ | |
9771b263 | 8282 | if (vec_safe_is_empty (constructor_elements)) |
3e4093b6 RS |
8283 | { |
8284 | if (!constructor_erroneous) | |
ea58ef42 | 8285 | error_init (loc, "empty scalar initializer"); |
916c5919 | 8286 | ret.value = error_mark_node; |
3e4093b6 | 8287 | } |
9771b263 | 8288 | else if (vec_safe_length (constructor_elements) != 1) |
3e4093b6 | 8289 | { |
ea58ef42 | 8290 | error_init (loc, "extra elements in scalar initializer"); |
9771b263 | 8291 | ret.value = (*constructor_elements)[0].value; |
3e4093b6 RS |
8292 | } |
8293 | else | |
9771b263 | 8294 | ret.value = (*constructor_elements)[0].value; |
3e4093b6 RS |
8295 | } |
8296 | else | |
8297 | { | |
8298 | if (constructor_erroneous) | |
916c5919 | 8299 | ret.value = error_mark_node; |
3e4093b6 RS |
8300 | else |
8301 | { | |
916c5919 | 8302 | ret.value = build_constructor (constructor_type, |
4038c495 | 8303 | constructor_elements); |
3e4093b6 | 8304 | if (constructor_constant) |
51eed280 | 8305 | TREE_CONSTANT (ret.value) = 1; |
3e4093b6 | 8306 | if (constructor_constant && constructor_simple) |
916c5919 | 8307 | TREE_STATIC (ret.value) = 1; |
928c19bb JM |
8308 | if (constructor_nonconst) |
8309 | CONSTRUCTOR_NON_CONST (ret.value) = 1; | |
3e4093b6 RS |
8310 | } |
8311 | } | |
de520661 | 8312 | |
928c19bb JM |
8313 | if (ret.value && TREE_CODE (ret.value) != CONSTRUCTOR) |
8314 | { | |
8315 | if (constructor_nonconst) | |
8316 | ret.original_code = C_MAYBE_CONST_EXPR; | |
8317 | else if (ret.original_code == C_MAYBE_CONST_EXPR) | |
8318 | ret.original_code = ERROR_MARK; | |
8319 | } | |
8320 | ||
3e4093b6 RS |
8321 | constructor_type = p->type; |
8322 | constructor_fields = p->fields; | |
8323 | constructor_index = p->index; | |
8324 | constructor_max_index = p->max_index; | |
8325 | constructor_unfilled_index = p->unfilled_index; | |
8326 | constructor_unfilled_fields = p->unfilled_fields; | |
8327 | constructor_bit_index = p->bit_index; | |
8328 | constructor_elements = p->elements; | |
8329 | constructor_constant = p->constant; | |
8330 | constructor_simple = p->simple; | |
928c19bb | 8331 | constructor_nonconst = p->nonconst; |
3e4093b6 RS |
8332 | constructor_erroneous = p->erroneous; |
8333 | constructor_incremental = p->incremental; | |
8334 | constructor_designated = p->designated; | |
976d5a22 | 8335 | designator_depth = p->designator_depth; |
3e4093b6 RS |
8336 | constructor_pending_elts = p->pending_elts; |
8337 | constructor_depth = p->depth; | |
8338 | if (!p->implicit) | |
8339 | constructor_range_stack = p->range_stack; | |
8340 | RESTORE_SPELLING_DEPTH (constructor_depth); | |
de520661 | 8341 | |
3e4093b6 RS |
8342 | constructor_stack = p->next; |
8343 | free (p); | |
b621a4dd | 8344 | |
3fa8871b | 8345 | if (ret.value == NULL_TREE && constructor_stack == 0) |
5d5e98dc | 8346 | ret.value = error_mark_node; |
916c5919 | 8347 | return ret; |
3e4093b6 | 8348 | } |
8b6a5902 | 8349 | |
3e4093b6 | 8350 | /* Common handling for both array range and field name designators. |
e3455240 | 8351 | ARRAY argument is nonzero for array ranges. Returns false for success. */ |
400fbf9f | 8352 | |
e3455240 | 8353 | static bool |
30af3a2b | 8354 | set_designator (location_t loc, bool array, |
ea58ef42 | 8355 | struct obstack *braced_init_obstack) |
de520661 | 8356 | { |
3e4093b6 RS |
8357 | tree subtype; |
8358 | enum tree_code subcode; | |
de520661 | 8359 | |
3e4093b6 RS |
8360 | /* Don't die if an entire brace-pair level is superfluous |
8361 | in the containing level. */ | |
3fa8871b | 8362 | if (constructor_type == NULL_TREE) |
e3455240 | 8363 | return true; |
de520661 | 8364 | |
366de0ce NS |
8365 | /* If there were errors in this designator list already, bail out |
8366 | silently. */ | |
b06df647 | 8367 | if (designator_erroneous) |
e3455240 | 8368 | return true; |
e28cae4f | 8369 | |
3e4093b6 RS |
8370 | if (!designator_depth) |
8371 | { | |
366de0ce | 8372 | gcc_assert (!constructor_range_stack); |
de520661 | 8373 | |
3e4093b6 RS |
8374 | /* Designator list starts at the level of closest explicit |
8375 | braces. */ | |
8376 | while (constructor_stack->implicit) | |
34cf811f | 8377 | process_init_element (input_location, |
5dd9a9d0 DM |
8378 | pop_init_level (loc, 1, braced_init_obstack, |
8379 | last_init_list_comma), | |
34cf811f | 8380 | true, braced_init_obstack); |
3e4093b6 | 8381 | constructor_designated = 1; |
e3455240 | 8382 | return false; |
3e4093b6 | 8383 | } |
de520661 | 8384 | |
366de0ce | 8385 | switch (TREE_CODE (constructor_type)) |
3c3fa147 | 8386 | { |
366de0ce NS |
8387 | case RECORD_TYPE: |
8388 | case UNION_TYPE: | |
3e4093b6 RS |
8389 | subtype = TREE_TYPE (constructor_fields); |
8390 | if (subtype != error_mark_node) | |
8391 | subtype = TYPE_MAIN_VARIANT (subtype); | |
366de0ce NS |
8392 | break; |
8393 | case ARRAY_TYPE: | |
3e4093b6 | 8394 | subtype = TYPE_MAIN_VARIANT (TREE_TYPE (constructor_type)); |
366de0ce NS |
8395 | break; |
8396 | default: | |
8397 | gcc_unreachable (); | |
de520661 | 8398 | } |
400fbf9f | 8399 | |
3e4093b6 RS |
8400 | subcode = TREE_CODE (subtype); |
8401 | if (array && subcode != ARRAY_TYPE) | |
8402 | { | |
ea58ef42 | 8403 | error_init (loc, "array index in non-array initializer"); |
e3455240 | 8404 | return true; |
3e4093b6 RS |
8405 | } |
8406 | else if (!array && subcode != RECORD_TYPE && subcode != UNION_TYPE) | |
8407 | { | |
ea58ef42 | 8408 | error_init (loc, "field name not in record or union initializer"); |
e3455240 | 8409 | return true; |
3e4093b6 | 8410 | } |
d45cf215 | 8411 | |
3e4093b6 | 8412 | constructor_designated = 1; |
16595a1f | 8413 | finish_implicit_inits (loc, braced_init_obstack); |
ea58ef42 | 8414 | push_init_level (loc, 2, braced_init_obstack); |
e3455240 | 8415 | return false; |
de520661 | 8416 | } |
400fbf9f | 8417 | |
3e4093b6 RS |
8418 | /* If there are range designators in designator list, push a new designator |
8419 | to constructor_range_stack. RANGE_END is end of such stack range or | |
8420 | NULL_TREE if there is no range designator at this level. */ | |
400fbf9f | 8421 | |
3e4093b6 | 8422 | static void |
a1e3b3d9 | 8423 | push_range_stack (tree range_end, struct obstack * braced_init_obstack) |
3e4093b6 RS |
8424 | { |
8425 | struct constructor_range_stack *p; | |
400fbf9f | 8426 | |
a1e3b3d9 LB |
8427 | p = (struct constructor_range_stack *) |
8428 | obstack_alloc (braced_init_obstack, | |
8429 | sizeof (struct constructor_range_stack)); | |
3e4093b6 RS |
8430 | p->prev = constructor_range_stack; |
8431 | p->next = 0; | |
8432 | p->fields = constructor_fields; | |
8433 | p->range_start = constructor_index; | |
8434 | p->index = constructor_index; | |
8435 | p->stack = constructor_stack; | |
8436 | p->range_end = range_end; | |
8b6a5902 | 8437 | if (constructor_range_stack) |
3e4093b6 RS |
8438 | constructor_range_stack->next = p; |
8439 | constructor_range_stack = p; | |
de520661 | 8440 | } |
400fbf9f | 8441 | |
3e4093b6 RS |
8442 | /* Within an array initializer, specify the next index to be initialized. |
8443 | FIRST is that index. If LAST is nonzero, then initialize a range | |
8444 | of indices, running from FIRST through LAST. */ | |
5a7ec9d9 | 8445 | |
de520661 | 8446 | void |
ea58ef42 | 8447 | set_init_index (location_t loc, tree first, tree last, |
d033409e | 8448 | struct obstack *braced_init_obstack) |
de520661 | 8449 | { |
30af3a2b | 8450 | if (set_designator (loc, true, braced_init_obstack)) |
3e4093b6 | 8451 | return; |
de520661 | 8452 | |
b06df647 | 8453 | designator_erroneous = 1; |
de520661 | 8454 | |
3ea8cd06 JM |
8455 | if (!INTEGRAL_TYPE_P (TREE_TYPE (first)) |
8456 | || (last && !INTEGRAL_TYPE_P (TREE_TYPE (last)))) | |
8457 | { | |
ea58ef42 | 8458 | error_init (loc, "array index in initializer not of integer type"); |
3ea8cd06 JM |
8459 | return; |
8460 | } | |
8461 | ||
2b6da65c JM |
8462 | if (TREE_CODE (first) != INTEGER_CST) |
8463 | { | |
8464 | first = c_fully_fold (first, false, NULL); | |
8465 | if (TREE_CODE (first) == INTEGER_CST) | |
d033409e | 8466 | pedwarn_init (loc, OPT_Wpedantic, |
2b6da65c JM |
8467 | "array index in initializer is not " |
8468 | "an integer constant expression"); | |
8469 | } | |
8470 | ||
8471 | if (last && TREE_CODE (last) != INTEGER_CST) | |
8472 | { | |
8473 | last = c_fully_fold (last, false, NULL); | |
8474 | if (TREE_CODE (last) == INTEGER_CST) | |
d033409e | 8475 | pedwarn_init (loc, OPT_Wpedantic, |
2b6da65c JM |
8476 | "array index in initializer is not " |
8477 | "an integer constant expression"); | |
8478 | } | |
8479 | ||
3e4093b6 | 8480 | if (TREE_CODE (first) != INTEGER_CST) |
ea58ef42 | 8481 | error_init (loc, "nonconstant array index in initializer"); |
3fa8871b | 8482 | else if (last != NULL_TREE && TREE_CODE (last) != INTEGER_CST) |
ea58ef42 | 8483 | error_init (loc, "nonconstant array index in initializer"); |
3e4093b6 | 8484 | else if (TREE_CODE (constructor_type) != ARRAY_TYPE) |
ea58ef42 | 8485 | error_init (loc, "array index in non-array initializer"); |
622adc7e | 8486 | else if (tree_int_cst_sgn (first) == -1) |
ea58ef42 | 8487 | error_init (loc, "array index in initializer exceeds array bounds"); |
3e4093b6 RS |
8488 | else if (constructor_max_index |
8489 | && tree_int_cst_lt (constructor_max_index, first)) | |
ea58ef42 | 8490 | error_init (loc, "array index in initializer exceeds array bounds"); |
3e4093b6 | 8491 | else |
de520661 | 8492 | { |
928c19bb JM |
8493 | constant_expression_warning (first); |
8494 | if (last) | |
8495 | constant_expression_warning (last); | |
3e4093b6 | 8496 | constructor_index = convert (bitsizetype, first); |
40d3d530 JR |
8497 | if (tree_int_cst_lt (constructor_index, first)) |
8498 | { | |
8499 | constructor_index = copy_node (constructor_index); | |
8500 | TREE_OVERFLOW (constructor_index) = 1; | |
8501 | } | |
665f2503 | 8502 | |
3e4093b6 | 8503 | if (last) |
2bede729 | 8504 | { |
3e4093b6 | 8505 | if (tree_int_cst_equal (first, last)) |
3fa8871b | 8506 | last = NULL_TREE; |
3e4093b6 RS |
8507 | else if (tree_int_cst_lt (last, first)) |
8508 | { | |
ea58ef42 | 8509 | error_init (loc, "empty index range in initializer"); |
3fa8871b | 8510 | last = NULL_TREE; |
3e4093b6 RS |
8511 | } |
8512 | else | |
8513 | { | |
8514 | last = convert (bitsizetype, last); | |
3fa8871b | 8515 | if (constructor_max_index != NULL_TREE |
3e4093b6 RS |
8516 | && tree_int_cst_lt (constructor_max_index, last)) |
8517 | { | |
ea58ef42 MP |
8518 | error_init (loc, "array index range in initializer exceeds " |
8519 | "array bounds"); | |
3fa8871b | 8520 | last = NULL_TREE; |
3e4093b6 RS |
8521 | } |
8522 | } | |
2bede729 | 8523 | } |
fed3cef0 | 8524 | |
3e4093b6 | 8525 | designator_depth++; |
b06df647 | 8526 | designator_erroneous = 0; |
3e4093b6 | 8527 | if (constructor_range_stack || last) |
a1e3b3d9 | 8528 | push_range_stack (last, braced_init_obstack); |
de520661 | 8529 | } |
de520661 | 8530 | } |
3e4093b6 RS |
8531 | |
8532 | /* Within a struct initializer, specify the next field to be initialized. */ | |
400fbf9f | 8533 | |
de520661 | 8534 | void |
f7e4f2e3 | 8535 | set_init_label (location_t loc, tree fieldname, location_t fieldname_loc, |
ea58ef42 | 8536 | struct obstack *braced_init_obstack) |
de520661 | 8537 | { |
0fb96aa4 | 8538 | tree field; |
94ba5069 | 8539 | |
30af3a2b | 8540 | if (set_designator (loc, false, braced_init_obstack)) |
3e4093b6 RS |
8541 | return; |
8542 | ||
b06df647 | 8543 | designator_erroneous = 1; |
3e4093b6 | 8544 | |
3e636daf | 8545 | if (!RECORD_OR_UNION_TYPE_P (constructor_type)) |
94ba5069 | 8546 | { |
ea58ef42 | 8547 | error_init (loc, "field name not in record or union initializer"); |
3e4093b6 | 8548 | return; |
94ba5069 RS |
8549 | } |
8550 | ||
0fb96aa4 | 8551 | field = lookup_field (constructor_type, fieldname); |
8b6a5902 | 8552 | |
3fa8871b | 8553 | if (field == NULL_TREE) |
f7e4f2e3 DM |
8554 | { |
8555 | tree guessed_id = lookup_field_fuzzy (constructor_type, fieldname); | |
8556 | if (guessed_id) | |
8557 | { | |
264757fb DM |
8558 | gcc_rich_location rich_loc (fieldname_loc); |
8559 | rich_loc.add_fixit_misspelled_id (fieldname_loc, guessed_id); | |
64a5912c DM |
8560 | error_at (&rich_loc, |
8561 | "%qT has no member named %qE; did you mean %qE?", | |
8562 | constructor_type, fieldname, guessed_id); | |
f7e4f2e3 DM |
8563 | } |
8564 | else | |
8565 | error_at (fieldname_loc, "%qT has no member named %qE", | |
8566 | constructor_type, fieldname); | |
8567 | } | |
3e4093b6 | 8568 | else |
0fb96aa4 JM |
8569 | do |
8570 | { | |
8571 | constructor_fields = TREE_VALUE (field); | |
8572 | designator_depth++; | |
8573 | designator_erroneous = 0; | |
8574 | if (constructor_range_stack) | |
8575 | push_range_stack (NULL_TREE, braced_init_obstack); | |
8576 | field = TREE_CHAIN (field); | |
8577 | if (field) | |
8578 | { | |
30af3a2b | 8579 | if (set_designator (loc, false, braced_init_obstack)) |
0fb96aa4 JM |
8580 | return; |
8581 | } | |
8582 | } | |
8583 | while (field != NULL_TREE); | |
3e4093b6 RS |
8584 | } |
8585 | \f | |
8586 | /* Add a new initializer to the tree of pending initializers. PURPOSE | |
8587 | identifies the initializer, either array index or field in a structure. | |
bbbbb16a ILT |
8588 | VALUE is the value of that index or field. If ORIGTYPE is not |
8589 | NULL_TREE, it is the original type of VALUE. | |
b295aee2 JJ |
8590 | |
8591 | IMPLICIT is true if value comes from pop_init_level (1), | |
8592 | the new initializer has been merged with the existing one | |
8593 | and thus no warnings should be emitted about overriding an | |
8594 | existing initializer. */ | |
de520661 | 8595 | |
3e4093b6 | 8596 | static void |
96b40f8d MP |
8597 | add_pending_init (location_t loc, tree purpose, tree value, tree origtype, |
8598 | bool implicit, struct obstack *braced_init_obstack) | |
3e4093b6 RS |
8599 | { |
8600 | struct init_node *p, **q, *r; | |
8601 | ||
8602 | q = &constructor_pending_elts; | |
8603 | p = 0; | |
8604 | ||
8605 | if (TREE_CODE (constructor_type) == ARRAY_TYPE) | |
de520661 | 8606 | { |
3e4093b6 | 8607 | while (*q != 0) |
91fa3c30 | 8608 | { |
3e4093b6 RS |
8609 | p = *q; |
8610 | if (tree_int_cst_lt (purpose, p->purpose)) | |
8611 | q = &p->left; | |
8612 | else if (tree_int_cst_lt (p->purpose, purpose)) | |
8613 | q = &p->right; | |
8614 | else | |
8615 | { | |
b295aee2 JJ |
8616 | if (!implicit) |
8617 | { | |
8618 | if (TREE_SIDE_EFFECTS (p->value)) | |
755e528f | 8619 | warning_init (loc, OPT_Woverride_init_side_effects, |
96b40f8d MP |
8620 | "initialized field with side-effects " |
8621 | "overwritten"); | |
b295aee2 | 8622 | else if (warn_override_init) |
96b40f8d MP |
8623 | warning_init (loc, OPT_Woverride_init, |
8624 | "initialized field overwritten"); | |
b295aee2 | 8625 | } |
3e4093b6 | 8626 | p->value = value; |
bbbbb16a | 8627 | p->origtype = origtype; |
3e4093b6 RS |
8628 | return; |
8629 | } | |
91fa3c30 | 8630 | } |
de520661 | 8631 | } |
3e4093b6 | 8632 | else |
de520661 | 8633 | { |
3e4093b6 | 8634 | tree bitpos; |
400fbf9f | 8635 | |
3e4093b6 RS |
8636 | bitpos = bit_position (purpose); |
8637 | while (*q != NULL) | |
8638 | { | |
8639 | p = *q; | |
8640 | if (tree_int_cst_lt (bitpos, bit_position (p->purpose))) | |
8641 | q = &p->left; | |
8642 | else if (p->purpose != purpose) | |
8643 | q = &p->right; | |
8644 | else | |
8645 | { | |
b295aee2 JJ |
8646 | if (!implicit) |
8647 | { | |
8648 | if (TREE_SIDE_EFFECTS (p->value)) | |
755e528f | 8649 | warning_init (loc, OPT_Woverride_init_side_effects, |
96b40f8d MP |
8650 | "initialized field with side-effects " |
8651 | "overwritten"); | |
b295aee2 | 8652 | else if (warn_override_init) |
96b40f8d MP |
8653 | warning_init (loc, OPT_Woverride_init, |
8654 | "initialized field overwritten"); | |
b295aee2 | 8655 | } |
3e4093b6 | 8656 | p->value = value; |
bbbbb16a | 8657 | p->origtype = origtype; |
3e4093b6 RS |
8658 | return; |
8659 | } | |
8660 | } | |
91fa3c30 | 8661 | } |
b71c7f8a | 8662 | |
a1e3b3d9 LB |
8663 | r = (struct init_node *) obstack_alloc (braced_init_obstack, |
8664 | sizeof (struct init_node)); | |
3e4093b6 RS |
8665 | r->purpose = purpose; |
8666 | r->value = value; | |
bbbbb16a | 8667 | r->origtype = origtype; |
8b6a5902 | 8668 | |
3e4093b6 RS |
8669 | *q = r; |
8670 | r->parent = p; | |
8671 | r->left = 0; | |
8672 | r->right = 0; | |
8673 | r->balance = 0; | |
b71c7f8a | 8674 | |
3e4093b6 | 8675 | while (p) |
de520661 | 8676 | { |
3e4093b6 | 8677 | struct init_node *s; |
665f2503 | 8678 | |
3e4093b6 | 8679 | if (r == p->left) |
2bede729 | 8680 | { |
3e4093b6 RS |
8681 | if (p->balance == 0) |
8682 | p->balance = -1; | |
8683 | else if (p->balance < 0) | |
8684 | { | |
8685 | if (r->balance < 0) | |
8686 | { | |
8687 | /* L rotation. */ | |
8688 | p->left = r->right; | |
8689 | if (p->left) | |
8690 | p->left->parent = p; | |
8691 | r->right = p; | |
e7b6a0ee | 8692 | |
3e4093b6 RS |
8693 | p->balance = 0; |
8694 | r->balance = 0; | |
39bc99c2 | 8695 | |
3e4093b6 RS |
8696 | s = p->parent; |
8697 | p->parent = r; | |
8698 | r->parent = s; | |
8699 | if (s) | |
8700 | { | |
8701 | if (s->left == p) | |
8702 | s->left = r; | |
8703 | else | |
8704 | s->right = r; | |
8705 | } | |
8706 | else | |
8707 | constructor_pending_elts = r; | |
8708 | } | |
8709 | else | |
8710 | { | |
8711 | /* LR rotation. */ | |
8712 | struct init_node *t = r->right; | |
e7b6a0ee | 8713 | |
3e4093b6 RS |
8714 | r->right = t->left; |
8715 | if (r->right) | |
8716 | r->right->parent = r; | |
8717 | t->left = r; | |
8718 | ||
8719 | p->left = t->right; | |
8720 | if (p->left) | |
8721 | p->left->parent = p; | |
8722 | t->right = p; | |
8723 | ||
8724 | p->balance = t->balance < 0; | |
8725 | r->balance = -(t->balance > 0); | |
8726 | t->balance = 0; | |
8727 | ||
8728 | s = p->parent; | |
8729 | p->parent = t; | |
8730 | r->parent = t; | |
8731 | t->parent = s; | |
8732 | if (s) | |
8733 | { | |
8734 | if (s->left == p) | |
8735 | s->left = t; | |
8736 | else | |
8737 | s->right = t; | |
8738 | } | |
8739 | else | |
8740 | constructor_pending_elts = t; | |
8741 | } | |
8742 | break; | |
8743 | } | |
8744 | else | |
8745 | { | |
8746 | /* p->balance == +1; growth of left side balances the node. */ | |
8747 | p->balance = 0; | |
8748 | break; | |
8749 | } | |
2bede729 | 8750 | } |
3e4093b6 RS |
8751 | else /* r == p->right */ |
8752 | { | |
8753 | if (p->balance == 0) | |
8754 | /* Growth propagation from right side. */ | |
8755 | p->balance++; | |
8756 | else if (p->balance > 0) | |
8757 | { | |
8758 | if (r->balance > 0) | |
8759 | { | |
8760 | /* R rotation. */ | |
8761 | p->right = r->left; | |
8762 | if (p->right) | |
8763 | p->right->parent = p; | |
8764 | r->left = p; | |
8765 | ||
8766 | p->balance = 0; | |
8767 | r->balance = 0; | |
8768 | ||
8769 | s = p->parent; | |
8770 | p->parent = r; | |
8771 | r->parent = s; | |
8772 | if (s) | |
8773 | { | |
8774 | if (s->left == p) | |
8775 | s->left = r; | |
8776 | else | |
8777 | s->right = r; | |
8778 | } | |
8779 | else | |
8780 | constructor_pending_elts = r; | |
8781 | } | |
8782 | else /* r->balance == -1 */ | |
8783 | { | |
8784 | /* RL rotation */ | |
8785 | struct init_node *t = r->left; | |
8786 | ||
8787 | r->left = t->right; | |
8788 | if (r->left) | |
8789 | r->left->parent = r; | |
8790 | t->right = r; | |
8791 | ||
8792 | p->right = t->left; | |
8793 | if (p->right) | |
8794 | p->right->parent = p; | |
8795 | t->left = p; | |
8796 | ||
8797 | r->balance = (t->balance < 0); | |
8798 | p->balance = -(t->balance > 0); | |
8799 | t->balance = 0; | |
8800 | ||
8801 | s = p->parent; | |
8802 | p->parent = t; | |
8803 | r->parent = t; | |
8804 | t->parent = s; | |
8805 | if (s) | |
8806 | { | |
8807 | if (s->left == p) | |
8808 | s->left = t; | |
8809 | else | |
8810 | s->right = t; | |
8811 | } | |
8812 | else | |
8813 | constructor_pending_elts = t; | |
8814 | } | |
8815 | break; | |
8816 | } | |
8817 | else | |
8818 | { | |
8819 | /* p->balance == -1; growth of right side balances the node. */ | |
8820 | p->balance = 0; | |
8821 | break; | |
8822 | } | |
8823 | } | |
8824 | ||
8825 | r = p; | |
8826 | p = p->parent; | |
8827 | } | |
8828 | } | |
8829 | ||
8830 | /* Build AVL tree from a sorted chain. */ | |
8831 | ||
8832 | static void | |
a1e3b3d9 | 8833 | set_nonincremental_init (struct obstack * braced_init_obstack) |
3e4093b6 | 8834 | { |
4038c495 GB |
8835 | unsigned HOST_WIDE_INT ix; |
8836 | tree index, value; | |
3e4093b6 RS |
8837 | |
8838 | if (TREE_CODE (constructor_type) != RECORD_TYPE | |
8839 | && TREE_CODE (constructor_type) != ARRAY_TYPE) | |
8840 | return; | |
8841 | ||
4038c495 | 8842 | FOR_EACH_CONSTRUCTOR_ELT (constructor_elements, ix, index, value) |
96b40f8d MP |
8843 | add_pending_init (input_location, index, value, NULL_TREE, true, |
8844 | braced_init_obstack); | |
9771b263 | 8845 | constructor_elements = NULL; |
3e4093b6 RS |
8846 | if (TREE_CODE (constructor_type) == RECORD_TYPE) |
8847 | { | |
8848 | constructor_unfilled_fields = TYPE_FIELDS (constructor_type); | |
8849 | /* Skip any nameless bit fields at the beginning. */ | |
3fa8871b | 8850 | while (constructor_unfilled_fields != NULL_TREE |
3e4093b6 | 8851 | && DECL_C_BIT_FIELD (constructor_unfilled_fields) |
3fa8871b | 8852 | && DECL_NAME (constructor_unfilled_fields) == NULL_TREE) |
3e4093b6 | 8853 | constructor_unfilled_fields = TREE_CHAIN (constructor_unfilled_fields); |
fed3cef0 | 8854 | |
de520661 | 8855 | } |
3e4093b6 | 8856 | else if (TREE_CODE (constructor_type) == ARRAY_TYPE) |
de520661 | 8857 | { |
3e4093b6 RS |
8858 | if (TYPE_DOMAIN (constructor_type)) |
8859 | constructor_unfilled_index | |
8860 | = convert (bitsizetype, | |
8861 | TYPE_MIN_VALUE (TYPE_DOMAIN (constructor_type))); | |
8862 | else | |
8863 | constructor_unfilled_index = bitsize_zero_node; | |
de520661 | 8864 | } |
3e4093b6 | 8865 | constructor_incremental = 0; |
de520661 | 8866 | } |
400fbf9f | 8867 | |
3e4093b6 | 8868 | /* Build AVL tree from a string constant. */ |
de520661 | 8869 | |
3e4093b6 | 8870 | static void |
a1e3b3d9 LB |
8871 | set_nonincremental_init_from_string (tree str, |
8872 | struct obstack * braced_init_obstack) | |
de520661 | 8873 | { |
3e4093b6 RS |
8874 | tree value, purpose, type; |
8875 | HOST_WIDE_INT val[2]; | |
8876 | const char *p, *end; | |
8877 | int byte, wchar_bytes, charwidth, bitpos; | |
de520661 | 8878 | |
366de0ce | 8879 | gcc_assert (TREE_CODE (constructor_type) == ARRAY_TYPE); |
940ff66d | 8880 | |
c466b2cd | 8881 | wchar_bytes = TYPE_PRECISION (TREE_TYPE (TREE_TYPE (str))) / BITS_PER_UNIT; |
3e4093b6 | 8882 | charwidth = TYPE_PRECISION (char_type_node); |
2f1364c2 JJ |
8883 | gcc_assert ((size_t) wchar_bytes * charwidth |
8884 | <= ARRAY_SIZE (val) * HOST_BITS_PER_WIDE_INT); | |
3e4093b6 RS |
8885 | type = TREE_TYPE (constructor_type); |
8886 | p = TREE_STRING_POINTER (str); | |
8887 | end = p + TREE_STRING_LENGTH (str); | |
91fa3c30 | 8888 | |
3e4093b6 | 8889 | for (purpose = bitsize_zero_node; |
8824edff JJ |
8890 | p < end |
8891 | && !(constructor_max_index | |
8892 | && tree_int_cst_lt (constructor_max_index, purpose)); | |
3e4093b6 | 8893 | purpose = size_binop (PLUS_EXPR, purpose, bitsize_one_node)) |
584ef5fe | 8894 | { |
3e4093b6 | 8895 | if (wchar_bytes == 1) |
ffc5c6a9 | 8896 | { |
807e902e KZ |
8897 | val[0] = (unsigned char) *p++; |
8898 | val[1] = 0; | |
ffc5c6a9 RH |
8899 | } |
8900 | else | |
3e4093b6 | 8901 | { |
3e4093b6 | 8902 | val[1] = 0; |
807e902e | 8903 | val[0] = 0; |
3e4093b6 RS |
8904 | for (byte = 0; byte < wchar_bytes; byte++) |
8905 | { | |
8906 | if (BYTES_BIG_ENDIAN) | |
8907 | bitpos = (wchar_bytes - byte - 1) * charwidth; | |
8908 | else | |
8909 | bitpos = byte * charwidth; | |
2f1364c2 | 8910 | val[bitpos / HOST_BITS_PER_WIDE_INT] |
3e4093b6 RS |
8911 | |= ((unsigned HOST_WIDE_INT) ((unsigned char) *p++)) |
8912 | << (bitpos % HOST_BITS_PER_WIDE_INT); | |
8913 | } | |
8914 | } | |
584ef5fe | 8915 | |
8df83eae | 8916 | if (!TYPE_UNSIGNED (type)) |
3e4093b6 RS |
8917 | { |
8918 | bitpos = ((wchar_bytes - 1) * charwidth) + HOST_BITS_PER_CHAR; | |
8919 | if (bitpos < HOST_BITS_PER_WIDE_INT) | |
8920 | { | |
e3fe09c1 | 8921 | if (val[0] & (HOST_WIDE_INT_1 << (bitpos - 1))) |
3e4093b6 | 8922 | { |
aa256c4a | 8923 | val[0] |= HOST_WIDE_INT_M1U << bitpos; |
807e902e | 8924 | val[1] = -1; |
3e4093b6 RS |
8925 | } |
8926 | } | |
8927 | else if (bitpos == HOST_BITS_PER_WIDE_INT) | |
8928 | { | |
807e902e KZ |
8929 | if (val[0] < 0) |
8930 | val[1] = -1; | |
3e4093b6 | 8931 | } |
e3fe09c1 | 8932 | else if (val[1] & (HOST_WIDE_INT_1 |
3e4093b6 | 8933 | << (bitpos - 1 - HOST_BITS_PER_WIDE_INT))) |
aa256c4a | 8934 | val[1] |= HOST_WIDE_INT_M1U << (bitpos - HOST_BITS_PER_WIDE_INT); |
3e4093b6 | 8935 | } |
ffc5c6a9 | 8936 | |
807e902e KZ |
8937 | value = wide_int_to_tree (type, |
8938 | wide_int::from_array (val, 2, | |
8939 | HOST_BITS_PER_WIDE_INT * 2)); | |
96b40f8d | 8940 | add_pending_init (input_location, purpose, value, NULL_TREE, true, |
a1e3b3d9 | 8941 | braced_init_obstack); |
9dfcc8db BH |
8942 | } |
8943 | ||
3e4093b6 RS |
8944 | constructor_incremental = 0; |
8945 | } | |
de520661 | 8946 | |
6574d78e | 8947 | /* Return value of FIELD in pending initializer or NULL_TREE if the field was |
3e4093b6 RS |
8948 | not initialized yet. */ |
8949 | ||
8950 | static tree | |
a1e3b3d9 | 8951 | find_init_member (tree field, struct obstack * braced_init_obstack) |
3e4093b6 RS |
8952 | { |
8953 | struct init_node *p; | |
8954 | ||
8955 | if (TREE_CODE (constructor_type) == ARRAY_TYPE) | |
19d76e60 | 8956 | { |
3e4093b6 RS |
8957 | if (constructor_incremental |
8958 | && tree_int_cst_lt (field, constructor_unfilled_index)) | |
a1e3b3d9 | 8959 | set_nonincremental_init (braced_init_obstack); |
3e4093b6 RS |
8960 | |
8961 | p = constructor_pending_elts; | |
8962 | while (p) | |
19d76e60 | 8963 | { |
3e4093b6 RS |
8964 | if (tree_int_cst_lt (field, p->purpose)) |
8965 | p = p->left; | |
8966 | else if (tree_int_cst_lt (p->purpose, field)) | |
8967 | p = p->right; | |
8968 | else | |
8969 | return p->value; | |
19d76e60 | 8970 | } |
19d76e60 | 8971 | } |
3e4093b6 | 8972 | else if (TREE_CODE (constructor_type) == RECORD_TYPE) |
de520661 | 8973 | { |
3e4093b6 | 8974 | tree bitpos = bit_position (field); |
de520661 | 8975 | |
3e4093b6 RS |
8976 | if (constructor_incremental |
8977 | && (!constructor_unfilled_fields | |
8978 | || tree_int_cst_lt (bitpos, | |
8979 | bit_position (constructor_unfilled_fields)))) | |
a1e3b3d9 | 8980 | set_nonincremental_init (braced_init_obstack); |
de520661 | 8981 | |
3e4093b6 RS |
8982 | p = constructor_pending_elts; |
8983 | while (p) | |
8984 | { | |
8985 | if (field == p->purpose) | |
8986 | return p->value; | |
8987 | else if (tree_int_cst_lt (bitpos, bit_position (p->purpose))) | |
8988 | p = p->left; | |
8989 | else | |
8990 | p = p->right; | |
8991 | } | |
8992 | } | |
8993 | else if (TREE_CODE (constructor_type) == UNION_TYPE) | |
de520661 | 8994 | { |
9771b263 DN |
8995 | if (!vec_safe_is_empty (constructor_elements) |
8996 | && (constructor_elements->last ().index == field)) | |
8997 | return constructor_elements->last ().value; | |
de520661 | 8998 | } |
6574d78e | 8999 | return NULL_TREE; |
de520661 RS |
9000 | } |
9001 | ||
3e4093b6 RS |
9002 | /* "Output" the next constructor element. |
9003 | At top level, really output it to assembler code now. | |
9004 | Otherwise, collect it in a list from which we will make a CONSTRUCTOR. | |
bbbbb16a | 9005 | If ORIGTYPE is not NULL_TREE, it is the original type of VALUE. |
3e4093b6 RS |
9006 | TYPE is the data type that the containing data type wants here. |
9007 | FIELD is the field (a FIELD_DECL) or the index that this element fills. | |
916c5919 JM |
9008 | If VALUE is a string constant, STRICT_STRING is true if it is |
9009 | unparenthesized or we should not warn here for it being parenthesized. | |
9010 | For other types of VALUE, STRICT_STRING is not used. | |
8b6a5902 | 9011 | |
30af3a2b MP |
9012 | PENDING if true means output pending elements that belong |
9013 | right after this element. (PENDING is normally true; | |
9014 | it is false while outputting pending elements, to avoid recursion.) | |
b295aee2 JJ |
9015 | |
9016 | IMPLICIT is true if value comes from pop_init_level (1), | |
9017 | the new initializer has been merged with the existing one | |
9018 | and thus no warnings should be emitted about overriding an | |
9019 | existing initializer. */ | |
8b6a5902 | 9020 | |
3e4093b6 | 9021 | static void |
34cf811f | 9022 | output_init_element (location_t loc, tree value, tree origtype, |
30af3a2b | 9023 | bool strict_string, tree type, tree field, bool pending, |
34cf811f | 9024 | bool implicit, struct obstack * braced_init_obstack) |
3e4093b6 | 9025 | { |
8ce94e44 | 9026 | tree semantic_type = NULL_TREE; |
928c19bb JM |
9027 | bool maybe_const = true; |
9028 | bool npc; | |
4038c495 | 9029 | |
0a880880 | 9030 | if (type == error_mark_node || value == error_mark_node) |
8b6a5902 | 9031 | { |
3e4093b6 RS |
9032 | constructor_erroneous = 1; |
9033 | return; | |
8b6a5902 | 9034 | } |
46bdb9cf JM |
9035 | if (TREE_CODE (TREE_TYPE (value)) == ARRAY_TYPE |
9036 | && (TREE_CODE (value) == STRING_CST | |
9037 | || TREE_CODE (value) == COMPOUND_LITERAL_EXPR) | |
9038 | && !(TREE_CODE (value) == STRING_CST | |
9039 | && TREE_CODE (type) == ARRAY_TYPE | |
9040 | && INTEGRAL_TYPE_P (TREE_TYPE (type))) | |
9041 | && !comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (value)), | |
9042 | TYPE_MAIN_VARIANT (type))) | |
c2255bc4 | 9043 | value = array_to_pointer_conversion (input_location, value); |
8b6a5902 | 9044 | |
3e4093b6 | 9045 | if (TREE_CODE (value) == COMPOUND_LITERAL_EXPR |
4435bb92 | 9046 | && require_constant_value && pending) |
8b6a5902 | 9047 | { |
3e4093b6 RS |
9048 | /* As an extension, allow initializing objects with static storage |
9049 | duration with compound literals (which are then treated just as | |
9050 | the brace enclosed list they contain). */ | |
4435bb92 MP |
9051 | if (flag_isoc99) |
9052 | pedwarn_init (loc, OPT_Wpedantic, "initializer element is not " | |
9053 | "constant"); | |
3e4093b6 RS |
9054 | tree decl = COMPOUND_LITERAL_EXPR_DECL (value); |
9055 | value = DECL_INITIAL (decl); | |
8b6a5902 JJ |
9056 | } |
9057 | ||
928c19bb | 9058 | npc = null_pointer_constant_p (value); |
8ce94e44 JM |
9059 | if (TREE_CODE (value) == EXCESS_PRECISION_EXPR) |
9060 | { | |
9061 | semantic_type = TREE_TYPE (value); | |
9062 | value = TREE_OPERAND (value, 0); | |
9063 | } | |
928c19bb JM |
9064 | value = c_fully_fold (value, require_constant_value, &maybe_const); |
9065 | ||
3e4093b6 RS |
9066 | if (value == error_mark_node) |
9067 | constructor_erroneous = 1; | |
9068 | else if (!TREE_CONSTANT (value)) | |
9069 | constructor_constant = 0; | |
ee45a32d EB |
9070 | else if (!initializer_constant_valid_p (value, |
9071 | TREE_TYPE (value), | |
9072 | AGGREGATE_TYPE_P (constructor_type) | |
9073 | && TYPE_REVERSE_STORAGE_ORDER | |
9074 | (constructor_type)) | |
3e636daf | 9075 | || (RECORD_OR_UNION_TYPE_P (constructor_type) |
3e4093b6 RS |
9076 | && DECL_C_BIT_FIELD (field) |
9077 | && TREE_CODE (value) != INTEGER_CST)) | |
9078 | constructor_simple = 0; | |
928c19bb JM |
9079 | if (!maybe_const) |
9080 | constructor_nonconst = 1; | |
3e4093b6 | 9081 | |
4378d117 MS |
9082 | /* Digest the initializer and issue any errors about incompatible |
9083 | types before issuing errors about non-constant initializers. */ | |
9084 | tree new_value = value; | |
9085 | if (semantic_type) | |
9086 | new_value = build1 (EXCESS_PRECISION_EXPR, semantic_type, value); | |
9087 | new_value = digest_init (loc, type, new_value, origtype, npc, strict_string, | |
9088 | require_constant_value); | |
9089 | if (new_value == error_mark_node) | |
9090 | { | |
9091 | constructor_erroneous = 1; | |
9092 | return; | |
9093 | } | |
9094 | if (require_constant_value || require_constant_elements) | |
9095 | constant_expression_warning (new_value); | |
9096 | ||
9097 | /* Proceed to check the constness of the original initializer. */ | |
116df786 | 9098 | if (!initializer_constant_valid_p (value, TREE_TYPE (value))) |
8b6a5902 | 9099 | { |
116df786 RH |
9100 | if (require_constant_value) |
9101 | { | |
ea58ef42 | 9102 | error_init (loc, "initializer element is not constant"); |
116df786 RH |
9103 | value = error_mark_node; |
9104 | } | |
9105 | else if (require_constant_elements) | |
8337d1db | 9106 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 9107 | "initializer element is not computable at load time"); |
8b6a5902 | 9108 | } |
928c19bb JM |
9109 | else if (!maybe_const |
9110 | && (require_constant_value || require_constant_elements)) | |
8337d1db | 9111 | pedwarn_init (loc, OPT_Wpedantic, |
928c19bb | 9112 | "initializer element is not a constant expression"); |
3e4093b6 | 9113 | |
81f40b79 ILT |
9114 | /* Issue -Wc++-compat warnings about initializing a bitfield with |
9115 | enum type. */ | |
9116 | if (warn_cxx_compat | |
9117 | && field != NULL_TREE | |
9118 | && TREE_CODE (field) == FIELD_DECL | |
9119 | && DECL_BIT_FIELD_TYPE (field) != NULL_TREE | |
9120 | && (TYPE_MAIN_VARIANT (DECL_BIT_FIELD_TYPE (field)) | |
9121 | != TYPE_MAIN_VARIANT (type)) | |
9122 | && TREE_CODE (DECL_BIT_FIELD_TYPE (field)) == ENUMERAL_TYPE) | |
9123 | { | |
9124 | tree checktype = origtype != NULL_TREE ? origtype : TREE_TYPE (value); | |
9125 | if (checktype != error_mark_node | |
9126 | && (TYPE_MAIN_VARIANT (checktype) | |
9127 | != TYPE_MAIN_VARIANT (DECL_BIT_FIELD_TYPE (field)))) | |
96b40f8d | 9128 | warning_init (loc, OPT_Wc___compat, |
81f40b79 ILT |
9129 | "enum conversion in initialization is invalid in C++"); |
9130 | } | |
9131 | ||
3e4093b6 RS |
9132 | /* If this field is empty (and not at the end of structure), |
9133 | don't do anything other than checking the initializer. */ | |
9134 | if (field | |
9135 | && (TREE_TYPE (field) == error_mark_node | |
9136 | || (COMPLETE_TYPE_P (TREE_TYPE (field)) | |
9137 | && integer_zerop (TYPE_SIZE (TREE_TYPE (field))) | |
9138 | && (TREE_CODE (constructor_type) == ARRAY_TYPE | |
910ad8de | 9139 | || DECL_CHAIN (field))))) |
3e4093b6 RS |
9140 | return; |
9141 | ||
4378d117 MS |
9142 | /* Finally, set VALUE to the initializer value digested above. */ |
9143 | value = new_value; | |
8b6a5902 | 9144 | |
3e4093b6 RS |
9145 | /* If this element doesn't come next in sequence, |
9146 | put it on constructor_pending_elts. */ | |
9147 | if (TREE_CODE (constructor_type) == ARRAY_TYPE | |
9148 | && (!constructor_incremental | |
9149 | || !tree_int_cst_equal (field, constructor_unfilled_index))) | |
8b6a5902 | 9150 | { |
3e4093b6 RS |
9151 | if (constructor_incremental |
9152 | && tree_int_cst_lt (field, constructor_unfilled_index)) | |
a1e3b3d9 | 9153 | set_nonincremental_init (braced_init_obstack); |
3e4093b6 | 9154 | |
96b40f8d | 9155 | add_pending_init (loc, field, value, origtype, implicit, |
a1e3b3d9 | 9156 | braced_init_obstack); |
3e4093b6 | 9157 | return; |
8b6a5902 | 9158 | } |
3e4093b6 RS |
9159 | else if (TREE_CODE (constructor_type) == RECORD_TYPE |
9160 | && (!constructor_incremental | |
9161 | || field != constructor_unfilled_fields)) | |
8b6a5902 | 9162 | { |
3e4093b6 RS |
9163 | /* We do this for records but not for unions. In a union, |
9164 | no matter which field is specified, it can be initialized | |
9165 | right away since it starts at the beginning of the union. */ | |
9166 | if (constructor_incremental) | |
9167 | { | |
9168 | if (!constructor_unfilled_fields) | |
a1e3b3d9 | 9169 | set_nonincremental_init (braced_init_obstack); |
3e4093b6 RS |
9170 | else |
9171 | { | |
9172 | tree bitpos, unfillpos; | |
9173 | ||
9174 | bitpos = bit_position (field); | |
9175 | unfillpos = bit_position (constructor_unfilled_fields); | |
9176 | ||
9177 | if (tree_int_cst_lt (bitpos, unfillpos)) | |
a1e3b3d9 | 9178 | set_nonincremental_init (braced_init_obstack); |
3e4093b6 RS |
9179 | } |
9180 | } | |
9181 | ||
96b40f8d | 9182 | add_pending_init (loc, field, value, origtype, implicit, |
a1e3b3d9 | 9183 | braced_init_obstack); |
3e4093b6 | 9184 | return; |
8b6a5902 | 9185 | } |
3e4093b6 | 9186 | else if (TREE_CODE (constructor_type) == UNION_TYPE |
9771b263 | 9187 | && !vec_safe_is_empty (constructor_elements)) |
3e4093b6 | 9188 | { |
b295aee2 JJ |
9189 | if (!implicit) |
9190 | { | |
9771b263 | 9191 | if (TREE_SIDE_EFFECTS (constructor_elements->last ().value)) |
755e528f | 9192 | warning_init (loc, OPT_Woverride_init_side_effects, |
b295aee2 JJ |
9193 | "initialized field with side-effects overwritten"); |
9194 | else if (warn_override_init) | |
96b40f8d MP |
9195 | warning_init (loc, OPT_Woverride_init, |
9196 | "initialized field overwritten"); | |
b295aee2 | 9197 | } |
8b6a5902 | 9198 | |
3e4093b6 | 9199 | /* We can have just one union field set. */ |
9771b263 | 9200 | constructor_elements = NULL; |
3e4093b6 | 9201 | } |
8b6a5902 | 9202 | |
3e4093b6 RS |
9203 | /* Otherwise, output this element either to |
9204 | constructor_elements or to the assembler file. */ | |
8b6a5902 | 9205 | |
f32682ca | 9206 | constructor_elt celt = {field, value}; |
9771b263 | 9207 | vec_safe_push (constructor_elements, celt); |
8b6a5902 | 9208 | |
3e4093b6 RS |
9209 | /* Advance the variable that indicates sequential elements output. */ |
9210 | if (TREE_CODE (constructor_type) == ARRAY_TYPE) | |
9211 | constructor_unfilled_index | |
db3927fb AH |
9212 | = size_binop_loc (input_location, PLUS_EXPR, constructor_unfilled_index, |
9213 | bitsize_one_node); | |
3e4093b6 RS |
9214 | else if (TREE_CODE (constructor_type) == RECORD_TYPE) |
9215 | { | |
9216 | constructor_unfilled_fields | |
910ad8de | 9217 | = DECL_CHAIN (constructor_unfilled_fields); |
8b6a5902 | 9218 | |
3e4093b6 | 9219 | /* Skip any nameless bit fields. */ |
3fa8871b | 9220 | while (constructor_unfilled_fields != NULL_TREE |
3e4093b6 | 9221 | && DECL_C_BIT_FIELD (constructor_unfilled_fields) |
3fa8871b | 9222 | && DECL_NAME (constructor_unfilled_fields) == NULL_TREE) |
3e4093b6 | 9223 | constructor_unfilled_fields = |
910ad8de | 9224 | DECL_CHAIN (constructor_unfilled_fields); |
3e4093b6 RS |
9225 | } |
9226 | else if (TREE_CODE (constructor_type) == UNION_TYPE) | |
3fa8871b | 9227 | constructor_unfilled_fields = NULL_TREE; |
de520661 | 9228 | |
3e4093b6 RS |
9229 | /* Now output any pending elements which have become next. */ |
9230 | if (pending) | |
a1e3b3d9 | 9231 | output_pending_init_elements (0, braced_init_obstack); |
3e4093b6 | 9232 | } |
8b6a5902 | 9233 | |
3e4093b6 RS |
9234 | /* Output any pending elements which have become next. |
9235 | As we output elements, constructor_unfilled_{fields,index} | |
9236 | advances, which may cause other elements to become next; | |
9237 | if so, they too are output. | |
8b6a5902 | 9238 | |
3e4093b6 RS |
9239 | If ALL is 0, we return when there are |
9240 | no more pending elements to output now. | |
665f2503 | 9241 | |
3e4093b6 RS |
9242 | If ALL is 1, we output space as necessary so that |
9243 | we can output all the pending elements. */ | |
3e4093b6 | 9244 | static void |
a1e3b3d9 | 9245 | output_pending_init_elements (int all, struct obstack * braced_init_obstack) |
3e4093b6 RS |
9246 | { |
9247 | struct init_node *elt = constructor_pending_elts; | |
9248 | tree next; | |
de520661 | 9249 | |
3e4093b6 RS |
9250 | retry: |
9251 | ||
ba228239 | 9252 | /* Look through the whole pending tree. |
3e4093b6 RS |
9253 | If we find an element that should be output now, |
9254 | output it. Otherwise, set NEXT to the element | |
9255 | that comes first among those still pending. */ | |
9256 | ||
3fa8871b | 9257 | next = NULL_TREE; |
3e4093b6 RS |
9258 | while (elt) |
9259 | { | |
9260 | if (TREE_CODE (constructor_type) == ARRAY_TYPE) | |
8b6a5902 | 9261 | { |
3e4093b6 RS |
9262 | if (tree_int_cst_equal (elt->purpose, |
9263 | constructor_unfilled_index)) | |
34cf811f MP |
9264 | output_init_element (input_location, elt->value, elt->origtype, |
9265 | true, TREE_TYPE (constructor_type), | |
30af3a2b | 9266 | constructor_unfilled_index, false, false, |
a1e3b3d9 | 9267 | braced_init_obstack); |
3e4093b6 RS |
9268 | else if (tree_int_cst_lt (constructor_unfilled_index, |
9269 | elt->purpose)) | |
8b6a5902 | 9270 | { |
3e4093b6 RS |
9271 | /* Advance to the next smaller node. */ |
9272 | if (elt->left) | |
9273 | elt = elt->left; | |
9274 | else | |
9275 | { | |
9276 | /* We have reached the smallest node bigger than the | |
9277 | current unfilled index. Fill the space first. */ | |
9278 | next = elt->purpose; | |
9279 | break; | |
9280 | } | |
8b6a5902 | 9281 | } |
ce662d4c JJ |
9282 | else |
9283 | { | |
3e4093b6 RS |
9284 | /* Advance to the next bigger node. */ |
9285 | if (elt->right) | |
9286 | elt = elt->right; | |
9287 | else | |
ce662d4c | 9288 | { |
3e4093b6 RS |
9289 | /* We have reached the biggest node in a subtree. Find |
9290 | the parent of it, which is the next bigger node. */ | |
9291 | while (elt->parent && elt->parent->right == elt) | |
9292 | elt = elt->parent; | |
9293 | elt = elt->parent; | |
9294 | if (elt && tree_int_cst_lt (constructor_unfilled_index, | |
9295 | elt->purpose)) | |
9296 | { | |
9297 | next = elt->purpose; | |
9298 | break; | |
9299 | } | |
ce662d4c JJ |
9300 | } |
9301 | } | |
8b6a5902 | 9302 | } |
3e636daf | 9303 | else if (RECORD_OR_UNION_TYPE_P (constructor_type)) |
3e4093b6 RS |
9304 | { |
9305 | tree ctor_unfilled_bitpos, elt_bitpos; | |
ce662d4c | 9306 | |
3e4093b6 | 9307 | /* If the current record is complete we are done. */ |
3fa8871b | 9308 | if (constructor_unfilled_fields == NULL_TREE) |
3e4093b6 | 9309 | break; |
de520661 | 9310 | |
3e4093b6 RS |
9311 | ctor_unfilled_bitpos = bit_position (constructor_unfilled_fields); |
9312 | elt_bitpos = bit_position (elt->purpose); | |
9313 | /* We can't compare fields here because there might be empty | |
9314 | fields in between. */ | |
9315 | if (tree_int_cst_equal (elt_bitpos, ctor_unfilled_bitpos)) | |
9316 | { | |
9317 | constructor_unfilled_fields = elt->purpose; | |
34cf811f MP |
9318 | output_init_element (input_location, elt->value, elt->origtype, |
9319 | true, TREE_TYPE (elt->purpose), | |
30af3a2b | 9320 | elt->purpose, false, false, |
a1e3b3d9 | 9321 | braced_init_obstack); |
3e4093b6 RS |
9322 | } |
9323 | else if (tree_int_cst_lt (ctor_unfilled_bitpos, elt_bitpos)) | |
9324 | { | |
9325 | /* Advance to the next smaller node. */ | |
9326 | if (elt->left) | |
9327 | elt = elt->left; | |
9328 | else | |
9329 | { | |
9330 | /* We have reached the smallest node bigger than the | |
9331 | current unfilled field. Fill the space first. */ | |
9332 | next = elt->purpose; | |
9333 | break; | |
9334 | } | |
9335 | } | |
9336 | else | |
9337 | { | |
9338 | /* Advance to the next bigger node. */ | |
9339 | if (elt->right) | |
9340 | elt = elt->right; | |
9341 | else | |
9342 | { | |
9343 | /* We have reached the biggest node in a subtree. Find | |
9344 | the parent of it, which is the next bigger node. */ | |
9345 | while (elt->parent && elt->parent->right == elt) | |
9346 | elt = elt->parent; | |
9347 | elt = elt->parent; | |
9348 | if (elt | |
9349 | && (tree_int_cst_lt (ctor_unfilled_bitpos, | |
9350 | bit_position (elt->purpose)))) | |
9351 | { | |
9352 | next = elt->purpose; | |
9353 | break; | |
9354 | } | |
9355 | } | |
9356 | } | |
9357 | } | |
9358 | } | |
de520661 | 9359 | |
3e4093b6 RS |
9360 | /* Ordinarily return, but not if we want to output all |
9361 | and there are elements left. */ | |
3fa8871b | 9362 | if (!(all && next != NULL_TREE)) |
e5cfb88f RK |
9363 | return; |
9364 | ||
3e4093b6 RS |
9365 | /* If it's not incremental, just skip over the gap, so that after |
9366 | jumping to retry we will output the next successive element. */ | |
3e636daf | 9367 | if (RECORD_OR_UNION_TYPE_P (constructor_type)) |
3e4093b6 RS |
9368 | constructor_unfilled_fields = next; |
9369 | else if (TREE_CODE (constructor_type) == ARRAY_TYPE) | |
9370 | constructor_unfilled_index = next; | |
de520661 | 9371 | |
3e4093b6 RS |
9372 | /* ELT now points to the node in the pending tree with the next |
9373 | initializer to output. */ | |
9374 | goto retry; | |
de520661 RS |
9375 | } |
9376 | \f | |
3e4093b6 RS |
9377 | /* Add one non-braced element to the current constructor level. |
9378 | This adjusts the current position within the constructor's type. | |
9379 | This may also start or terminate implicit levels | |
9380 | to handle a partly-braced initializer. | |
e5e809f4 | 9381 | |
3e4093b6 | 9382 | Once this has found the correct level for the new element, |
b295aee2 JJ |
9383 | it calls output_init_element. |
9384 | ||
9385 | IMPLICIT is true if value comes from pop_init_level (1), | |
9386 | the new initializer has been merged with the existing one | |
9387 | and thus no warnings should be emitted about overriding an | |
9388 | existing initializer. */ | |
3e4093b6 RS |
9389 | |
9390 | void | |
34cf811f | 9391 | process_init_element (location_t loc, struct c_expr value, bool implicit, |
a1e3b3d9 | 9392 | struct obstack * braced_init_obstack) |
e5e809f4 | 9393 | { |
916c5919 | 9394 | tree orig_value = value.value; |
3fa8871b MP |
9395 | int string_flag |
9396 | = (orig_value != NULL_TREE && TREE_CODE (orig_value) == STRING_CST); | |
916c5919 | 9397 | bool strict_string = value.original_code == STRING_CST; |
340baef7 | 9398 | bool was_designated = designator_depth != 0; |
e5e809f4 | 9399 | |
3e4093b6 | 9400 | designator_depth = 0; |
b06df647 | 9401 | designator_erroneous = 0; |
e5e809f4 | 9402 | |
9bac5cbb G |
9403 | if (!implicit && value.value && !integer_zerop (value.value)) |
9404 | constructor_zeroinit = 0; | |
9405 | ||
3e4093b6 RS |
9406 | /* Handle superfluous braces around string cst as in |
9407 | char x[] = {"foo"}; */ | |
9408 | if (string_flag | |
9409 | && constructor_type | |
340baef7 | 9410 | && !was_designated |
3e4093b6 | 9411 | && TREE_CODE (constructor_type) == ARRAY_TYPE |
197463ae | 9412 | && INTEGRAL_TYPE_P (TREE_TYPE (constructor_type)) |
3e4093b6 | 9413 | && integer_zerop (constructor_unfilled_index)) |
e5e809f4 | 9414 | { |
916c5919 | 9415 | if (constructor_stack->replacement_value.value) |
ea58ef42 | 9416 | error_init (loc, "excess elements in char array initializer"); |
3e4093b6 RS |
9417 | constructor_stack->replacement_value = value; |
9418 | return; | |
e5e809f4 | 9419 | } |
8b6a5902 | 9420 | |
3fa8871b | 9421 | if (constructor_stack->replacement_value.value != NULL_TREE) |
3e4093b6 | 9422 | { |
ea58ef42 | 9423 | error_init (loc, "excess elements in struct initializer"); |
3e4093b6 | 9424 | return; |
e5e809f4 JL |
9425 | } |
9426 | ||
3e4093b6 RS |
9427 | /* Ignore elements of a brace group if it is entirely superfluous |
9428 | and has already been diagnosed. */ | |
3fa8871b | 9429 | if (constructor_type == NULL_TREE) |
3e4093b6 | 9430 | return; |
e5e809f4 | 9431 | |
976d5a22 TT |
9432 | if (!implicit && warn_designated_init && !was_designated |
9433 | && TREE_CODE (constructor_type) == RECORD_TYPE | |
9434 | && lookup_attribute ("designated_init", | |
9435 | TYPE_ATTRIBUTES (constructor_type))) | |
9436 | warning_init (loc, | |
9437 | OPT_Wdesignated_init, | |
9438 | "positional initialization of field " | |
9439 | "in %<struct%> declared with %<designated_init%> attribute"); | |
9440 | ||
3e4093b6 RS |
9441 | /* If we've exhausted any levels that didn't have braces, |
9442 | pop them now. */ | |
9443 | while (constructor_stack->implicit) | |
9444 | { | |
3e636daf | 9445 | if (RECORD_OR_UNION_TYPE_P (constructor_type) |
3fa8871b | 9446 | && constructor_fields == NULL_TREE) |
ea58ef42 | 9447 | process_init_element (loc, |
5dd9a9d0 DM |
9448 | pop_init_level (loc, 1, braced_init_obstack, |
9449 | last_init_list_comma), | |
a1e3b3d9 | 9450 | true, braced_init_obstack); |
53650abe | 9451 | else if ((TREE_CODE (constructor_type) == ARRAY_TYPE |
31521951 | 9452 | || VECTOR_TYPE_P (constructor_type)) |
8824edff JJ |
9453 | && constructor_max_index |
9454 | && tree_int_cst_lt (constructor_max_index, | |
9455 | constructor_index)) | |
ea58ef42 | 9456 | process_init_element (loc, |
5dd9a9d0 DM |
9457 | pop_init_level (loc, 1, braced_init_obstack, |
9458 | last_init_list_comma), | |
a1e3b3d9 | 9459 | true, braced_init_obstack); |
3e4093b6 RS |
9460 | else |
9461 | break; | |
9462 | } | |
e5e809f4 | 9463 | |
3e4093b6 RS |
9464 | /* In the case of [LO ... HI] = VALUE, only evaluate VALUE once. */ |
9465 | if (constructor_range_stack) | |
e5e809f4 | 9466 | { |
3e4093b6 RS |
9467 | /* If value is a compound literal and we'll be just using its |
9468 | content, don't put it into a SAVE_EXPR. */ | |
916c5919 | 9469 | if (TREE_CODE (value.value) != COMPOUND_LITERAL_EXPR |
c3e38a03 | 9470 | || !require_constant_value) |
8ce94e44 JM |
9471 | { |
9472 | tree semantic_type = NULL_TREE; | |
9473 | if (TREE_CODE (value.value) == EXCESS_PRECISION_EXPR) | |
9474 | { | |
9475 | semantic_type = TREE_TYPE (value.value); | |
9476 | value.value = TREE_OPERAND (value.value, 0); | |
9477 | } | |
b2fa0a8b | 9478 | value.value = save_expr (value.value); |
8ce94e44 JM |
9479 | if (semantic_type) |
9480 | value.value = build1 (EXCESS_PRECISION_EXPR, semantic_type, | |
9481 | value.value); | |
9482 | } | |
3e4093b6 | 9483 | } |
e5e809f4 | 9484 | |
3e4093b6 RS |
9485 | while (1) |
9486 | { | |
9487 | if (TREE_CODE (constructor_type) == RECORD_TYPE) | |
e5e809f4 | 9488 | { |
3e4093b6 RS |
9489 | tree fieldtype; |
9490 | enum tree_code fieldcode; | |
e5e809f4 | 9491 | |
3fa8871b | 9492 | if (constructor_fields == NULL_TREE) |
3e4093b6 | 9493 | { |
ea58ef42 | 9494 | pedwarn_init (loc, 0, "excess elements in struct initializer"); |
3e4093b6 RS |
9495 | break; |
9496 | } | |
e5e809f4 | 9497 | |
3e4093b6 RS |
9498 | fieldtype = TREE_TYPE (constructor_fields); |
9499 | if (fieldtype != error_mark_node) | |
9500 | fieldtype = TYPE_MAIN_VARIANT (fieldtype); | |
9501 | fieldcode = TREE_CODE (fieldtype); | |
e5e809f4 | 9502 | |
3e4093b6 RS |
9503 | /* Error for non-static initialization of a flexible array member. */ |
9504 | if (fieldcode == ARRAY_TYPE | |
9505 | && !require_constant_value | |
9506 | && TYPE_SIZE (fieldtype) == NULL_TREE | |
f7587ed0 | 9507 | && DECL_CHAIN (constructor_fields) == NULL_TREE) |
3e4093b6 | 9508 | { |
ea58ef42 MP |
9509 | error_init (loc, "non-static initialization of a flexible " |
9510 | "array member"); | |
3e4093b6 RS |
9511 | break; |
9512 | } | |
e5e809f4 | 9513 | |
2cc901dc MP |
9514 | /* Error for initialization of a flexible array member with |
9515 | a string constant if the structure is in an array. E.g.: | |
9516 | struct S { int x; char y[]; }; | |
9517 | struct S s[] = { { 1, "foo" } }; | |
9518 | is invalid. */ | |
9519 | if (string_flag | |
9520 | && fieldcode == ARRAY_TYPE | |
9521 | && constructor_depth > 1 | |
9522 | && TYPE_SIZE (fieldtype) == NULL_TREE | |
9523 | && DECL_CHAIN (constructor_fields) == NULL_TREE) | |
9524 | { | |
9525 | bool in_array_p = false; | |
9526 | for (struct constructor_stack *p = constructor_stack; | |
9527 | p && p->type; p = p->next) | |
9528 | if (TREE_CODE (p->type) == ARRAY_TYPE) | |
9529 | { | |
9530 | in_array_p = true; | |
9531 | break; | |
9532 | } | |
9533 | if (in_array_p) | |
9534 | { | |
9535 | error_init (loc, "initialization of flexible array " | |
9536 | "member in a nested context"); | |
9537 | break; | |
9538 | } | |
9539 | } | |
9540 | ||
3e4093b6 | 9541 | /* Accept a string constant to initialize a subarray. */ |
3fa8871b | 9542 | if (value.value != NULL_TREE |
3e4093b6 | 9543 | && fieldcode == ARRAY_TYPE |
197463ae | 9544 | && INTEGRAL_TYPE_P (TREE_TYPE (fieldtype)) |
3e4093b6 | 9545 | && string_flag) |
916c5919 | 9546 | value.value = orig_value; |
3e4093b6 RS |
9547 | /* Otherwise, if we have come to a subaggregate, |
9548 | and we don't have an element of its type, push into it. */ | |
3fa8871b | 9549 | else if (value.value != NULL_TREE |
916c5919 JM |
9550 | && value.value != error_mark_node |
9551 | && TYPE_MAIN_VARIANT (TREE_TYPE (value.value)) != fieldtype | |
3e4093b6 | 9552 | && (fieldcode == RECORD_TYPE || fieldcode == ARRAY_TYPE |
53650abe | 9553 | || fieldcode == UNION_TYPE || fieldcode == VECTOR_TYPE)) |
3e4093b6 | 9554 | { |
ea58ef42 | 9555 | push_init_level (loc, 1, braced_init_obstack); |
3e4093b6 RS |
9556 | continue; |
9557 | } | |
e5e809f4 | 9558 | |
916c5919 | 9559 | if (value.value) |
3e4093b6 RS |
9560 | { |
9561 | push_member_name (constructor_fields); | |
34cf811f | 9562 | output_init_element (loc, value.value, value.original_type, |
bbbbb16a | 9563 | strict_string, fieldtype, |
30af3a2b | 9564 | constructor_fields, true, implicit, |
a1e3b3d9 | 9565 | braced_init_obstack); |
3e4093b6 | 9566 | RESTORE_SPELLING_DEPTH (constructor_depth); |
e5e809f4 JL |
9567 | } |
9568 | else | |
3e4093b6 RS |
9569 | /* Do the bookkeeping for an element that was |
9570 | directly output as a constructor. */ | |
e5e809f4 | 9571 | { |
3e4093b6 RS |
9572 | /* For a record, keep track of end position of last field. */ |
9573 | if (DECL_SIZE (constructor_fields)) | |
c22cacf3 | 9574 | constructor_bit_index |
db3927fb AH |
9575 | = size_binop_loc (input_location, PLUS_EXPR, |
9576 | bit_position (constructor_fields), | |
9577 | DECL_SIZE (constructor_fields)); | |
3e4093b6 RS |
9578 | |
9579 | /* If the current field was the first one not yet written out, | |
9580 | it isn't now, so update. */ | |
9581 | if (constructor_unfilled_fields == constructor_fields) | |
9582 | { | |
910ad8de | 9583 | constructor_unfilled_fields = DECL_CHAIN (constructor_fields); |
3e4093b6 RS |
9584 | /* Skip any nameless bit fields. */ |
9585 | while (constructor_unfilled_fields != 0 | |
9586 | && DECL_C_BIT_FIELD (constructor_unfilled_fields) | |
9587 | && DECL_NAME (constructor_unfilled_fields) == 0) | |
9588 | constructor_unfilled_fields = | |
910ad8de | 9589 | DECL_CHAIN (constructor_unfilled_fields); |
3e4093b6 | 9590 | } |
e5e809f4 | 9591 | } |
3e4093b6 | 9592 | |
910ad8de | 9593 | constructor_fields = DECL_CHAIN (constructor_fields); |
3e4093b6 | 9594 | /* Skip any nameless bit fields at the beginning. */ |
3fa8871b | 9595 | while (constructor_fields != NULL_TREE |
3e4093b6 | 9596 | && DECL_C_BIT_FIELD (constructor_fields) |
3fa8871b | 9597 | && DECL_NAME (constructor_fields) == NULL_TREE) |
910ad8de | 9598 | constructor_fields = DECL_CHAIN (constructor_fields); |
e5e809f4 | 9599 | } |
3e4093b6 | 9600 | else if (TREE_CODE (constructor_type) == UNION_TYPE) |
e5e809f4 | 9601 | { |
3e4093b6 RS |
9602 | tree fieldtype; |
9603 | enum tree_code fieldcode; | |
e5e809f4 | 9604 | |
3fa8871b | 9605 | if (constructor_fields == NULL_TREE) |
3e4093b6 | 9606 | { |
d033409e | 9607 | pedwarn_init (loc, 0, |
509c9d60 | 9608 | "excess elements in union initializer"); |
3e4093b6 RS |
9609 | break; |
9610 | } | |
e5e809f4 | 9611 | |
3e4093b6 RS |
9612 | fieldtype = TREE_TYPE (constructor_fields); |
9613 | if (fieldtype != error_mark_node) | |
9614 | fieldtype = TYPE_MAIN_VARIANT (fieldtype); | |
9615 | fieldcode = TREE_CODE (fieldtype); | |
e5e809f4 | 9616 | |
3e4093b6 RS |
9617 | /* Warn that traditional C rejects initialization of unions. |
9618 | We skip the warning if the value is zero. This is done | |
9619 | under the assumption that the zero initializer in user | |
9620 | code appears conditioned on e.g. __STDC__ to avoid | |
9621 | "missing initializer" warnings and relies on default | |
9622 | initialization to zero in the traditional C case. | |
9623 | We also skip the warning if the initializer is designated, | |
9624 | again on the assumption that this must be conditional on | |
9625 | __STDC__ anyway (and we've already complained about the | |
9626 | member-designator already). */ | |
8400e75e | 9627 | if (!in_system_header_at (input_location) && !constructor_designated |
916c5919 JM |
9628 | && !(value.value && (integer_zerop (value.value) |
9629 | || real_zerop (value.value)))) | |
3176a0c2 DD |
9630 | warning (OPT_Wtraditional, "traditional C rejects initialization " |
9631 | "of unions"); | |
e5e809f4 | 9632 | |
3e4093b6 | 9633 | /* Accept a string constant to initialize a subarray. */ |
3fa8871b | 9634 | if (value.value != NULL_TREE |
3e4093b6 | 9635 | && fieldcode == ARRAY_TYPE |
197463ae | 9636 | && INTEGRAL_TYPE_P (TREE_TYPE (fieldtype)) |
3e4093b6 | 9637 | && string_flag) |
916c5919 | 9638 | value.value = orig_value; |
3e4093b6 RS |
9639 | /* Otherwise, if we have come to a subaggregate, |
9640 | and we don't have an element of its type, push into it. */ | |
3fa8871b | 9641 | else if (value.value != NULL_TREE |
916c5919 JM |
9642 | && value.value != error_mark_node |
9643 | && TYPE_MAIN_VARIANT (TREE_TYPE (value.value)) != fieldtype | |
3e4093b6 | 9644 | && (fieldcode == RECORD_TYPE || fieldcode == ARRAY_TYPE |
53650abe | 9645 | || fieldcode == UNION_TYPE || fieldcode == VECTOR_TYPE)) |
3e4093b6 | 9646 | { |
ea58ef42 | 9647 | push_init_level (loc, 1, braced_init_obstack); |
3e4093b6 RS |
9648 | continue; |
9649 | } | |
e5e809f4 | 9650 | |
916c5919 | 9651 | if (value.value) |
3e4093b6 RS |
9652 | { |
9653 | push_member_name (constructor_fields); | |
34cf811f | 9654 | output_init_element (loc, value.value, value.original_type, |
bbbbb16a | 9655 | strict_string, fieldtype, |
30af3a2b | 9656 | constructor_fields, true, implicit, |
a1e3b3d9 | 9657 | braced_init_obstack); |
3e4093b6 | 9658 | RESTORE_SPELLING_DEPTH (constructor_depth); |
e5e809f4 JL |
9659 | } |
9660 | else | |
3e4093b6 RS |
9661 | /* Do the bookkeeping for an element that was |
9662 | directly output as a constructor. */ | |
e5e809f4 | 9663 | { |
3e4093b6 | 9664 | constructor_bit_index = DECL_SIZE (constructor_fields); |
f7587ed0 | 9665 | constructor_unfilled_fields = DECL_CHAIN (constructor_fields); |
e5e809f4 | 9666 | } |
e5e809f4 | 9667 | |
3fa8871b | 9668 | constructor_fields = NULL_TREE; |
3e4093b6 RS |
9669 | } |
9670 | else if (TREE_CODE (constructor_type) == ARRAY_TYPE) | |
9671 | { | |
9672 | tree elttype = TYPE_MAIN_VARIANT (TREE_TYPE (constructor_type)); | |
9673 | enum tree_code eltcode = TREE_CODE (elttype); | |
e5e809f4 | 9674 | |
3e4093b6 | 9675 | /* Accept a string constant to initialize a subarray. */ |
3fa8871b | 9676 | if (value.value != NULL_TREE |
3e4093b6 | 9677 | && eltcode == ARRAY_TYPE |
197463ae | 9678 | && INTEGRAL_TYPE_P (TREE_TYPE (elttype)) |
3e4093b6 | 9679 | && string_flag) |
916c5919 | 9680 | value.value = orig_value; |
3e4093b6 RS |
9681 | /* Otherwise, if we have come to a subaggregate, |
9682 | and we don't have an element of its type, push into it. */ | |
3fa8871b | 9683 | else if (value.value != NULL_TREE |
916c5919 JM |
9684 | && value.value != error_mark_node |
9685 | && TYPE_MAIN_VARIANT (TREE_TYPE (value.value)) != elttype | |
3e4093b6 | 9686 | && (eltcode == RECORD_TYPE || eltcode == ARRAY_TYPE |
53650abe | 9687 | || eltcode == UNION_TYPE || eltcode == VECTOR_TYPE)) |
3e4093b6 | 9688 | { |
ea58ef42 | 9689 | push_init_level (loc, 1, braced_init_obstack); |
3e4093b6 RS |
9690 | continue; |
9691 | } | |
8b6a5902 | 9692 | |
3fa8871b | 9693 | if (constructor_max_index != NULL_TREE |
3e4093b6 RS |
9694 | && (tree_int_cst_lt (constructor_max_index, constructor_index) |
9695 | || integer_all_onesp (constructor_max_index))) | |
9696 | { | |
d033409e | 9697 | pedwarn_init (loc, 0, |
509c9d60 | 9698 | "excess elements in array initializer"); |
3e4093b6 RS |
9699 | break; |
9700 | } | |
8b6a5902 | 9701 | |
3e4093b6 | 9702 | /* Now output the actual element. */ |
916c5919 | 9703 | if (value.value) |
3e4093b6 | 9704 | { |
ae7e9ddd | 9705 | push_array_bounds (tree_to_uhwi (constructor_index)); |
34cf811f | 9706 | output_init_element (loc, value.value, value.original_type, |
bbbbb16a | 9707 | strict_string, elttype, |
30af3a2b | 9708 | constructor_index, true, implicit, |
a1e3b3d9 | 9709 | braced_init_obstack); |
3e4093b6 RS |
9710 | RESTORE_SPELLING_DEPTH (constructor_depth); |
9711 | } | |
2f6e4e97 | 9712 | |
3e4093b6 | 9713 | constructor_index |
db3927fb AH |
9714 | = size_binop_loc (input_location, PLUS_EXPR, |
9715 | constructor_index, bitsize_one_node); | |
8b6a5902 | 9716 | |
916c5919 | 9717 | if (!value.value) |
3e4093b6 RS |
9718 | /* If we are doing the bookkeeping for an element that was |
9719 | directly output as a constructor, we must update | |
9720 | constructor_unfilled_index. */ | |
9721 | constructor_unfilled_index = constructor_index; | |
9722 | } | |
31521951 | 9723 | else if (VECTOR_TYPE_P (constructor_type)) |
3e4093b6 RS |
9724 | { |
9725 | tree elttype = TYPE_MAIN_VARIANT (TREE_TYPE (constructor_type)); | |
8b6a5902 | 9726 | |
c22cacf3 MS |
9727 | /* Do a basic check of initializer size. Note that vectors |
9728 | always have a fixed size derived from their type. */ | |
3e4093b6 RS |
9729 | if (tree_int_cst_lt (constructor_max_index, constructor_index)) |
9730 | { | |
d033409e | 9731 | pedwarn_init (loc, 0, |
509c9d60 | 9732 | "excess elements in vector initializer"); |
3e4093b6 RS |
9733 | break; |
9734 | } | |
8b6a5902 | 9735 | |
3e4093b6 | 9736 | /* Now output the actual element. */ |
916c5919 | 9737 | if (value.value) |
53650abe AP |
9738 | { |
9739 | if (TREE_CODE (value.value) == VECTOR_CST) | |
9740 | elttype = TYPE_MAIN_VARIANT (constructor_type); | |
34cf811f | 9741 | output_init_element (loc, value.value, value.original_type, |
53650abe | 9742 | strict_string, elttype, |
30af3a2b | 9743 | constructor_index, true, implicit, |
a1e3b3d9 | 9744 | braced_init_obstack); |
53650abe | 9745 | } |
8b6a5902 | 9746 | |
3e4093b6 | 9747 | constructor_index |
db3927fb AH |
9748 | = size_binop_loc (input_location, |
9749 | PLUS_EXPR, constructor_index, bitsize_one_node); | |
8b6a5902 | 9750 | |
916c5919 | 9751 | if (!value.value) |
3e4093b6 RS |
9752 | /* If we are doing the bookkeeping for an element that was |
9753 | directly output as a constructor, we must update | |
9754 | constructor_unfilled_index. */ | |
9755 | constructor_unfilled_index = constructor_index; | |
9756 | } | |
8b6a5902 | 9757 | |
3e4093b6 RS |
9758 | /* Handle the sole element allowed in a braced initializer |
9759 | for a scalar variable. */ | |
b4519d39 | 9760 | else if (constructor_type != error_mark_node |
3fa8871b | 9761 | && constructor_fields == NULL_TREE) |
8b6a5902 | 9762 | { |
d033409e | 9763 | pedwarn_init (loc, 0, |
509c9d60 | 9764 | "excess elements in scalar initializer"); |
3e4093b6 | 9765 | break; |
8b6a5902 JJ |
9766 | } |
9767 | else | |
9768 | { | |
916c5919 | 9769 | if (value.value) |
34cf811f | 9770 | output_init_element (loc, value.value, value.original_type, |
bbbbb16a | 9771 | strict_string, constructor_type, |
30af3a2b | 9772 | NULL_TREE, true, implicit, |
a1e3b3d9 | 9773 | braced_init_obstack); |
3fa8871b | 9774 | constructor_fields = NULL_TREE; |
8b6a5902 JJ |
9775 | } |
9776 | ||
3e4093b6 RS |
9777 | /* Handle range initializers either at this level or anywhere higher |
9778 | in the designator stack. */ | |
9779 | if (constructor_range_stack) | |
8b6a5902 | 9780 | { |
3e4093b6 RS |
9781 | struct constructor_range_stack *p, *range_stack; |
9782 | int finish = 0; | |
9783 | ||
9784 | range_stack = constructor_range_stack; | |
9785 | constructor_range_stack = 0; | |
9786 | while (constructor_stack != range_stack->stack) | |
8b6a5902 | 9787 | { |
366de0ce | 9788 | gcc_assert (constructor_stack->implicit); |
34cf811f | 9789 | process_init_element (loc, |
ea58ef42 | 9790 | pop_init_level (loc, 1, |
5dd9a9d0 DM |
9791 | braced_init_obstack, |
9792 | last_init_list_comma), | |
a1e3b3d9 | 9793 | true, braced_init_obstack); |
8b6a5902 | 9794 | } |
3e4093b6 RS |
9795 | for (p = range_stack; |
9796 | !p->range_end || tree_int_cst_equal (p->index, p->range_end); | |
9797 | p = p->prev) | |
8b6a5902 | 9798 | { |
366de0ce | 9799 | gcc_assert (constructor_stack->implicit); |
34cf811f | 9800 | process_init_element (loc, |
ea58ef42 | 9801 | pop_init_level (loc, 1, |
5dd9a9d0 DM |
9802 | braced_init_obstack, |
9803 | last_init_list_comma), | |
a1e3b3d9 | 9804 | true, braced_init_obstack); |
8b6a5902 | 9805 | } |
3e4093b6 | 9806 | |
db3927fb AH |
9807 | p->index = size_binop_loc (input_location, |
9808 | PLUS_EXPR, p->index, bitsize_one_node); | |
3e4093b6 RS |
9809 | if (tree_int_cst_equal (p->index, p->range_end) && !p->prev) |
9810 | finish = 1; | |
9811 | ||
9812 | while (1) | |
9813 | { | |
9814 | constructor_index = p->index; | |
9815 | constructor_fields = p->fields; | |
9816 | if (finish && p->range_end && p->index == p->range_start) | |
9817 | { | |
9818 | finish = 0; | |
9819 | p->prev = 0; | |
9820 | } | |
9821 | p = p->next; | |
9822 | if (!p) | |
9823 | break; | |
16595a1f | 9824 | finish_implicit_inits (loc, braced_init_obstack); |
ea58ef42 | 9825 | push_init_level (loc, 2, braced_init_obstack); |
3e4093b6 RS |
9826 | p->stack = constructor_stack; |
9827 | if (p->range_end && tree_int_cst_equal (p->index, p->range_end)) | |
9828 | p->index = p->range_start; | |
9829 | } | |
9830 | ||
9831 | if (!finish) | |
9832 | constructor_range_stack = range_stack; | |
9833 | continue; | |
8b6a5902 JJ |
9834 | } |
9835 | ||
3e4093b6 | 9836 | break; |
8b6a5902 JJ |
9837 | } |
9838 | ||
3e4093b6 RS |
9839 | constructor_range_stack = 0; |
9840 | } | |
9841 | \f | |
9f0e2d86 ZW |
9842 | /* Build a complete asm-statement, whose components are a CV_QUALIFIER |
9843 | (guaranteed to be 'volatile' or null) and ARGS (represented using | |
e130a54b | 9844 | an ASM_EXPR node). */ |
3e4093b6 | 9845 | tree |
9f0e2d86 | 9846 | build_asm_stmt (tree cv_qualifier, tree args) |
3e4093b6 | 9847 | { |
6de9cd9a DN |
9848 | if (!ASM_VOLATILE_P (args) && cv_qualifier) |
9849 | ASM_VOLATILE_P (args) = 1; | |
9f0e2d86 | 9850 | return add_stmt (args); |
8b6a5902 JJ |
9851 | } |
9852 | ||
9f0e2d86 ZW |
9853 | /* Build an asm-expr, whose components are a STRING, some OUTPUTS, |
9854 | some INPUTS, and some CLOBBERS. The latter three may be NULL. | |
9855 | SIMPLE indicates whether there was anything at all after the | |
9856 | string in the asm expression -- asm("blah") and asm("blah" : ) | |
e130a54b | 9857 | are subtly different. We use a ASM_EXPR node to represent this. */ |
3e4093b6 | 9858 | tree |
c2255bc4 | 9859 | build_asm_expr (location_t loc, tree string, tree outputs, tree inputs, |
1c384bf1 | 9860 | tree clobbers, tree labels, bool simple) |
e5e809f4 | 9861 | { |
3e4093b6 | 9862 | tree tail; |
9f0e2d86 | 9863 | tree args; |
6de9cd9a DN |
9864 | int i; |
9865 | const char *constraint; | |
74f0c611 | 9866 | const char **oconstraints; |
6de9cd9a | 9867 | bool allows_mem, allows_reg, is_inout; |
74f0c611 | 9868 | int ninputs, noutputs; |
6de9cd9a DN |
9869 | |
9870 | ninputs = list_length (inputs); | |
9871 | noutputs = list_length (outputs); | |
74f0c611 RH |
9872 | oconstraints = (const char **) alloca (noutputs * sizeof (const char *)); |
9873 | ||
1c384bf1 | 9874 | string = resolve_asm_operand_names (string, outputs, inputs, labels); |
3e4093b6 | 9875 | |
6de9cd9a DN |
9876 | /* Remove output conversions that change the type but not the mode. */ |
9877 | for (i = 0, tail = outputs; tail; ++i, tail = TREE_CHAIN (tail)) | |
e5e809f4 | 9878 | { |
3e4093b6 | 9879 | tree output = TREE_VALUE (tail); |
74f0c611 | 9880 | |
f9c59f7e | 9881 | output = c_fully_fold (output, false, NULL, true); |
eadd3d0d | 9882 | |
74f0c611 RH |
9883 | /* ??? Really, this should not be here. Users should be using a |
9884 | proper lvalue, dammit. But there's a long history of using casts | |
9885 | in the output operands. In cases like longlong.h, this becomes a | |
9886 | primitive form of typechecking -- if the cast can be removed, then | |
9887 | the output operand had a type of the proper width; otherwise we'll | |
9888 | get an error. Gross, but ... */ | |
3e4093b6 | 9889 | STRIP_NOPS (output); |
74f0c611 | 9890 | |
7bd11157 | 9891 | if (!lvalue_or_else (loc, output, lv_asm)) |
74f0c611 | 9892 | output = error_mark_node; |
8b6a5902 | 9893 | |
5544530a PB |
9894 | if (output != error_mark_node |
9895 | && (TREE_READONLY (output) | |
9896 | || TYPE_READONLY (TREE_TYPE (output)) | |
3e636daf | 9897 | || (RECORD_OR_UNION_TYPE_P (TREE_TYPE (output)) |
5544530a | 9898 | && C_TYPE_FIELDS_READONLY (TREE_TYPE (output))))) |
c02065fc | 9899 | readonly_error (loc, output, lv_asm); |
5544530a | 9900 | |
6de9cd9a | 9901 | constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (tail))); |
74f0c611 RH |
9902 | oconstraints[i] = constraint; |
9903 | ||
9904 | if (parse_output_constraint (&constraint, i, ninputs, noutputs, | |
9905 | &allows_mem, &allows_reg, &is_inout)) | |
9906 | { | |
9907 | /* If the operand is going to end up in memory, | |
9908 | mark it addressable. */ | |
9909 | if (!allows_reg && !c_mark_addressable (output)) | |
9910 | output = error_mark_node; | |
bae5cddf JJ |
9911 | if (!(!allows_reg && allows_mem) |
9912 | && output != error_mark_node | |
9913 | && VOID_TYPE_P (TREE_TYPE (output))) | |
9914 | { | |
9915 | error_at (loc, "invalid use of void expression"); | |
9916 | output = error_mark_node; | |
9917 | } | |
74f0c611 RH |
9918 | } |
9919 | else | |
c22cacf3 | 9920 | output = error_mark_node; |
3e4093b6 | 9921 | |
74f0c611 | 9922 | TREE_VALUE (tail) = output; |
8b6a5902 | 9923 | } |
3e4093b6 | 9924 | |
74f0c611 RH |
9925 | for (i = 0, tail = inputs; tail; ++i, tail = TREE_CHAIN (tail)) |
9926 | { | |
9927 | tree input; | |
9928 | ||
9929 | constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (tail))); | |
9930 | input = TREE_VALUE (tail); | |
9931 | ||
74f0c611 RH |
9932 | if (parse_input_constraint (&constraint, i, ninputs, noutputs, 0, |
9933 | oconstraints, &allows_mem, &allows_reg)) | |
9934 | { | |
9935 | /* If the operand is going to end up in memory, | |
9936 | mark it addressable. */ | |
b4c33883 AP |
9937 | if (!allows_reg && allows_mem) |
9938 | { | |
f9c59f7e | 9939 | input = c_fully_fold (input, false, NULL, true); |
eadd3d0d | 9940 | |
b4c33883 AP |
9941 | /* Strip the nops as we allow this case. FIXME, this really |
9942 | should be rejected or made deprecated. */ | |
9943 | STRIP_NOPS (input); | |
9944 | if (!c_mark_addressable (input)) | |
9945 | input = error_mark_node; | |
bae5cddf | 9946 | } |
eadd3d0d | 9947 | else |
bae5cddf | 9948 | { |
eadd3d0d JJ |
9949 | struct c_expr expr; |
9950 | memset (&expr, 0, sizeof (expr)); | |
9951 | expr.value = input; | |
267bac10 | 9952 | expr = convert_lvalue_to_rvalue (loc, expr, true, false); |
eadd3d0d JJ |
9953 | input = c_fully_fold (expr.value, false, NULL); |
9954 | ||
9955 | if (input != error_mark_node && VOID_TYPE_P (TREE_TYPE (input))) | |
9956 | { | |
9957 | error_at (loc, "invalid use of void expression"); | |
9958 | input = error_mark_node; | |
9959 | } | |
bae5cddf | 9960 | } |
74f0c611 RH |
9961 | } |
9962 | else | |
9963 | input = error_mark_node; | |
9964 | ||
9965 | TREE_VALUE (tail) = input; | |
9966 | } | |
3e4093b6 | 9967 | |
1c384bf1 RH |
9968 | /* ASMs with labels cannot have outputs. This should have been |
9969 | enforced by the parser. */ | |
9970 | gcc_assert (outputs == NULL || labels == NULL); | |
9971 | ||
9972 | args = build_stmt (loc, ASM_EXPR, string, outputs, inputs, clobbers, labels); | |
9f0e2d86 | 9973 | |
5544530a PB |
9974 | /* asm statements without outputs, including simple ones, are treated |
9975 | as volatile. */ | |
9976 | ASM_INPUT_P (args) = simple; | |
9977 | ASM_VOLATILE_P (args) = (noutputs == 0); | |
74f0c611 | 9978 | |
9f0e2d86 | 9979 | return args; |
e5e809f4 | 9980 | } |
3e4093b6 | 9981 | \f |
c2255bc4 AH |
9982 | /* Generate a goto statement to LABEL. LOC is the location of the |
9983 | GOTO. */ | |
506e2710 RH |
9984 | |
9985 | tree | |
c2255bc4 | 9986 | c_finish_goto_label (location_t loc, tree label) |
506e2710 | 9987 | { |
e1b7793c | 9988 | tree decl = lookup_label_for_goto (loc, label); |
506e2710 RH |
9989 | if (!decl) |
9990 | return NULL_TREE; | |
506e2710 | 9991 | TREE_USED (decl) = 1; |
c2255bc4 | 9992 | { |
7fef86d3 | 9993 | add_stmt (build_predict_expr (PRED_GOTO, NOT_TAKEN)); |
c2255bc4 AH |
9994 | tree t = build1 (GOTO_EXPR, void_type_node, decl); |
9995 | SET_EXPR_LOCATION (t, loc); | |
9996 | return add_stmt (t); | |
9997 | } | |
506e2710 RH |
9998 | } |
9999 | ||
c2255bc4 AH |
10000 | /* Generate a computed goto statement to EXPR. LOC is the location of |
10001 | the GOTO. */ | |
506e2710 RH |
10002 | |
10003 | tree | |
c2255bc4 | 10004 | c_finish_goto_ptr (location_t loc, tree expr) |
506e2710 | 10005 | { |
c2255bc4 | 10006 | tree t; |
c1771a20 | 10007 | pedwarn (loc, OPT_Wpedantic, "ISO C forbids %<goto *expr;%>"); |
928c19bb | 10008 | expr = c_fully_fold (expr, false, NULL); |
506e2710 | 10009 | expr = convert (ptr_type_node, expr); |
c2255bc4 AH |
10010 | t = build1 (GOTO_EXPR, void_type_node, expr); |
10011 | SET_EXPR_LOCATION (t, loc); | |
10012 | return add_stmt (t); | |
506e2710 RH |
10013 | } |
10014 | ||
5088b058 | 10015 | /* Generate a C `return' statement. RETVAL is the expression for what |
c2255bc4 | 10016 | to return, or a null pointer for `return;' with no value. LOC is |
6e07c515 MP |
10017 | the location of the return statement, or the location of the expression, |
10018 | if the statement has any. If ORIGTYPE is not NULL_TREE, it | |
c2255bc4 | 10019 | is the original type of RETVAL. */ |
de520661 | 10020 | |
506e2710 | 10021 | tree |
c2255bc4 | 10022 | c_finish_return (location_t loc, tree retval, tree origtype) |
3e4093b6 | 10023 | { |
0c9b182b JJ |
10024 | tree valtype = TREE_TYPE (TREE_TYPE (current_function_decl)), ret_stmt; |
10025 | bool no_warning = false; | |
928c19bb | 10026 | bool npc = false; |
3e4093b6 | 10027 | |
de8ddd5f MP |
10028 | /* Use the expansion point to handle cases such as returning NULL |
10029 | in a function returning void. */ | |
10030 | source_location xloc = expansion_point_location_if_in_system_header (loc); | |
10031 | ||
3e4093b6 | 10032 | if (TREE_THIS_VOLATILE (current_function_decl)) |
de8ddd5f | 10033 | warning_at (xloc, 0, |
c2255bc4 | 10034 | "function declared %<noreturn%> has a %<return%> statement"); |
3e4093b6 | 10035 | |
928c19bb JM |
10036 | if (retval) |
10037 | { | |
8ce94e44 | 10038 | tree semantic_type = NULL_TREE; |
928c19bb | 10039 | npc = null_pointer_constant_p (retval); |
8ce94e44 JM |
10040 | if (TREE_CODE (retval) == EXCESS_PRECISION_EXPR) |
10041 | { | |
10042 | semantic_type = TREE_TYPE (retval); | |
10043 | retval = TREE_OPERAND (retval, 0); | |
10044 | } | |
928c19bb | 10045 | retval = c_fully_fold (retval, false, NULL); |
8ce94e44 JM |
10046 | if (semantic_type) |
10047 | retval = build1 (EXCESS_PRECISION_EXPR, semantic_type, retval); | |
928c19bb JM |
10048 | } |
10049 | ||
3e4093b6 | 10050 | if (!retval) |
de520661 | 10051 | { |
3e4093b6 RS |
10052 | current_function_returns_null = 1; |
10053 | if ((warn_return_type || flag_isoc99) | |
3fa8871b | 10054 | && valtype != NULL_TREE && TREE_CODE (valtype) != VOID_TYPE) |
0c9b182b | 10055 | { |
94c40e19 | 10056 | bool warned_here; |
35aff4fb | 10057 | if (flag_isoc99) |
94c40e19 DM |
10058 | warned_here = pedwarn |
10059 | (loc, 0, | |
10060 | "%<return%> with no value, in function returning non-void"); | |
35aff4fb | 10061 | else |
94c40e19 DM |
10062 | warned_here = warning_at |
10063 | (loc, OPT_Wreturn_type, | |
10064 | "%<return%> with no value, in function returning non-void"); | |
0c9b182b | 10065 | no_warning = true; |
94c40e19 DM |
10066 | if (warned_here) |
10067 | inform (DECL_SOURCE_LOCATION (current_function_decl), | |
10068 | "declared here"); | |
0c9b182b | 10069 | } |
400fbf9f | 10070 | } |
3fa8871b | 10071 | else if (valtype == NULL_TREE || TREE_CODE (valtype) == VOID_TYPE) |
de520661 | 10072 | { |
3e4093b6 | 10073 | current_function_returns_null = 1; |
94c40e19 | 10074 | bool warned_here; |
2397c575 | 10075 | if (TREE_CODE (TREE_TYPE (retval)) != VOID_TYPE) |
94c40e19 DM |
10076 | warned_here = pedwarn |
10077 | (xloc, 0, | |
10078 | "%<return%> with a value, in function returning void"); | |
b8698a0f | 10079 | else |
94c40e19 DM |
10080 | warned_here = pedwarn |
10081 | (xloc, OPT_Wpedantic, "ISO C forbids " | |
10082 | "%<return%> with expression, in function returning void"); | |
10083 | if (warned_here) | |
10084 | inform (DECL_SOURCE_LOCATION (current_function_decl), | |
10085 | "declared here"); | |
de520661 | 10086 | } |
3e4093b6 | 10087 | else |
de520661 | 10088 | { |
68fca595 MP |
10089 | tree t = convert_for_assignment (loc, UNKNOWN_LOCATION, valtype, |
10090 | retval, origtype, ic_return, | |
c2255bc4 | 10091 | npc, NULL_TREE, NULL_TREE, 0); |
3e4093b6 RS |
10092 | tree res = DECL_RESULT (current_function_decl); |
10093 | tree inner; | |
9feb29df | 10094 | bool save; |
3e4093b6 RS |
10095 | |
10096 | current_function_returns_value = 1; | |
10097 | if (t == error_mark_node) | |
506e2710 | 10098 | return NULL_TREE; |
3e4093b6 | 10099 | |
9feb29df JJ |
10100 | save = in_late_binary_op; |
10101 | if (TREE_CODE (TREE_TYPE (res)) == BOOLEAN_TYPE | |
e5341100 JJ |
10102 | || TREE_CODE (TREE_TYPE (res)) == COMPLEX_TYPE |
10103 | || (TREE_CODE (TREE_TYPE (t)) == REAL_TYPE | |
10104 | && (TREE_CODE (TREE_TYPE (res)) == INTEGER_TYPE | |
10105 | || TREE_CODE (TREE_TYPE (res)) == ENUMERAL_TYPE) | |
45b2222a | 10106 | && sanitize_flags_p (SANITIZE_FLOAT_CAST))) |
9feb29df | 10107 | in_late_binary_op = true; |
3e4093b6 | 10108 | inner = t = convert (TREE_TYPE (res), t); |
9feb29df | 10109 | in_late_binary_op = save; |
3e4093b6 RS |
10110 | |
10111 | /* Strip any conversions, additions, and subtractions, and see if | |
10112 | we are returning the address of a local variable. Warn if so. */ | |
10113 | while (1) | |
8b6a5902 | 10114 | { |
3e4093b6 | 10115 | switch (TREE_CODE (inner)) |
8b6a5902 | 10116 | { |
849421a3 JJ |
10117 | CASE_CONVERT: |
10118 | case NON_LVALUE_EXPR: | |
3e4093b6 | 10119 | case PLUS_EXPR: |
849421a3 | 10120 | case POINTER_PLUS_EXPR: |
3e4093b6 RS |
10121 | inner = TREE_OPERAND (inner, 0); |
10122 | continue; | |
10123 | ||
10124 | case MINUS_EXPR: | |
10125 | /* If the second operand of the MINUS_EXPR has a pointer | |
10126 | type (or is converted from it), this may be valid, so | |
10127 | don't give a warning. */ | |
10128 | { | |
10129 | tree op1 = TREE_OPERAND (inner, 1); | |
8b6a5902 | 10130 | |
3f75a254 | 10131 | while (!POINTER_TYPE_P (TREE_TYPE (op1)) |
1043771b TB |
10132 | && (CONVERT_EXPR_P (op1) |
10133 | || TREE_CODE (op1) == NON_LVALUE_EXPR)) | |
3e4093b6 | 10134 | op1 = TREE_OPERAND (op1, 0); |
8b6a5902 | 10135 | |
3e4093b6 RS |
10136 | if (POINTER_TYPE_P (TREE_TYPE (op1))) |
10137 | break; | |
8b6a5902 | 10138 | |
3e4093b6 RS |
10139 | inner = TREE_OPERAND (inner, 0); |
10140 | continue; | |
10141 | } | |
400fbf9f | 10142 | |
3e4093b6 RS |
10143 | case ADDR_EXPR: |
10144 | inner = TREE_OPERAND (inner, 0); | |
c2f4acb7 | 10145 | |
6615c446 | 10146 | while (REFERENCE_CLASS_P (inner) |
22d03525 | 10147 | && !INDIRECT_REF_P (inner)) |
3e4093b6 | 10148 | inner = TREE_OPERAND (inner, 0); |
8b6a5902 | 10149 | |
a2f1f4c3 | 10150 | if (DECL_P (inner) |
3f75a254 JM |
10151 | && !DECL_EXTERNAL (inner) |
10152 | && !TREE_STATIC (inner) | |
3e4093b6 | 10153 | && DECL_CONTEXT (inner) == current_function_decl) |
19fc9faa MP |
10154 | { |
10155 | if (TREE_CODE (inner) == LABEL_DECL) | |
10156 | warning_at (loc, OPT_Wreturn_local_addr, | |
10157 | "function returns address of label"); | |
10158 | else | |
b4dfdc11 MG |
10159 | { |
10160 | warning_at (loc, OPT_Wreturn_local_addr, | |
10161 | "function returns address of local variable"); | |
10162 | tree zero = build_zero_cst (TREE_TYPE (res)); | |
10163 | t = build2 (COMPOUND_EXPR, TREE_TYPE (res), t, zero); | |
10164 | } | |
19fc9faa | 10165 | } |
3e4093b6 | 10166 | break; |
8b6a5902 | 10167 | |
3e4093b6 RS |
10168 | default: |
10169 | break; | |
10170 | } | |
de520661 | 10171 | |
3e4093b6 RS |
10172 | break; |
10173 | } | |
10174 | ||
53fb4de3 | 10175 | retval = build2 (MODIFY_EXPR, TREE_TYPE (res), res, t); |
c2255bc4 | 10176 | SET_EXPR_LOCATION (retval, loc); |
ca085fd7 MLI |
10177 | |
10178 | if (warn_sequence_point) | |
10179 | verify_sequence_points (retval); | |
de520661 | 10180 | } |
8b6a5902 | 10181 | |
c2255bc4 | 10182 | ret_stmt = build_stmt (loc, RETURN_EXPR, retval); |
0c9b182b JJ |
10183 | TREE_NO_WARNING (ret_stmt) |= no_warning; |
10184 | return add_stmt (ret_stmt); | |
de520661 | 10185 | } |
3e4093b6 RS |
10186 | \f |
10187 | struct c_switch { | |
604f5adf ILT |
10188 | /* The SWITCH_EXPR being built. */ |
10189 | tree switch_expr; | |
a6c0a76c | 10190 | |
89dbed81 | 10191 | /* The original type of the testing expression, i.e. before the |
a6c0a76c SB |
10192 | default conversion is applied. */ |
10193 | tree orig_type; | |
10194 | ||
3e4093b6 RS |
10195 | /* A splay-tree mapping the low element of a case range to the high |
10196 | element, or NULL_TREE if there is no high element. Used to | |
10197 | determine whether or not a new case label duplicates an old case | |
10198 | label. We need a tree, rather than simply a hash table, because | |
10199 | of the GNU case range extension. */ | |
10200 | splay_tree cases; | |
a6c0a76c | 10201 | |
e1b7793c ILT |
10202 | /* The bindings at the point of the switch. This is used for |
10203 | warnings crossing decls when branching to a case label. */ | |
10204 | struct c_spot_bindings *bindings; | |
187230a7 | 10205 | |
3e4093b6 RS |
10206 | /* The next node on the stack. */ |
10207 | struct c_switch *next; | |
b155cfd9 MP |
10208 | |
10209 | /* Remember whether the controlling expression had boolean type | |
10210 | before integer promotions for the sake of -Wswitch-bool. */ | |
10211 | bool bool_cond_p; | |
10212 | ||
10213 | /* Remember whether there was a case value that is outside the | |
10214 | range of the ORIG_TYPE. */ | |
10215 | bool outside_range_p; | |
3e4093b6 | 10216 | }; |
400fbf9f | 10217 | |
3e4093b6 RS |
10218 | /* A stack of the currently active switch statements. The innermost |
10219 | switch statement is on the top of the stack. There is no need to | |
10220 | mark the stack for garbage collection because it is only active | |
10221 | during the processing of the body of a function, and we never | |
10222 | collect at that point. */ | |
de520661 | 10223 | |
506e2710 | 10224 | struct c_switch *c_switch_stack; |
de520661 | 10225 | |
3e4093b6 | 10226 | /* Start a C switch statement, testing expression EXP. Return the new |
c2255bc4 | 10227 | SWITCH_EXPR. SWITCH_LOC is the location of the `switch'. |
fedfecef | 10228 | SWITCH_COND_LOC is the location of the switch's condition. |
b155cfd9 | 10229 | EXPLICIT_CAST_P is true if the expression EXP has an explicit cast. */ |
de520661 | 10230 | |
3e4093b6 | 10231 | tree |
c2255bc4 AH |
10232 | c_start_case (location_t switch_loc, |
10233 | location_t switch_cond_loc, | |
fedfecef | 10234 | tree exp, bool explicit_cast_p) |
de520661 | 10235 | { |
c58e8676 | 10236 | tree orig_type = error_mark_node; |
b155cfd9 | 10237 | bool bool_cond_p = false; |
3e4093b6 | 10238 | struct c_switch *cs; |
2f6e4e97 | 10239 | |
3e4093b6 | 10240 | if (exp != error_mark_node) |
de520661 | 10241 | { |
3e4093b6 RS |
10242 | orig_type = TREE_TYPE (exp); |
10243 | ||
c58e8676 | 10244 | if (!INTEGRAL_TYPE_P (orig_type)) |
de520661 | 10245 | { |
c58e8676 VR |
10246 | if (orig_type != error_mark_node) |
10247 | { | |
c2255bc4 | 10248 | error_at (switch_cond_loc, "switch quantity not an integer"); |
c58e8676 VR |
10249 | orig_type = error_mark_node; |
10250 | } | |
3e4093b6 | 10251 | exp = integer_zero_node; |
de520661 | 10252 | } |
3e4093b6 | 10253 | else |
de520661 | 10254 | { |
c58e8676 | 10255 | tree type = TYPE_MAIN_VARIANT (orig_type); |
fedfecef MP |
10256 | tree e = exp; |
10257 | ||
10258 | /* Warn if the condition has boolean value. */ | |
10259 | while (TREE_CODE (e) == COMPOUND_EXPR) | |
10260 | e = TREE_OPERAND (e, 1); | |
10261 | ||
10262 | if ((TREE_CODE (type) == BOOLEAN_TYPE | |
10263 | || truth_value_p (TREE_CODE (e))) | |
10264 | /* Explicit cast to int suppresses this warning. */ | |
10265 | && !(TREE_CODE (type) == INTEGER_TYPE | |
10266 | && explicit_cast_p)) | |
b155cfd9 | 10267 | bool_cond_p = true; |
8b6a5902 | 10268 | |
8400e75e | 10269 | if (!in_system_header_at (input_location) |
3e4093b6 RS |
10270 | && (type == long_integer_type_node |
10271 | || type == long_unsigned_type_node)) | |
c2255bc4 AH |
10272 | warning_at (switch_cond_loc, |
10273 | OPT_Wtraditional, "%<long%> switch expression not " | |
10274 | "converted to %<int%> in ISO C"); | |
8b6a5902 | 10275 | |
928c19bb | 10276 | exp = c_fully_fold (exp, false, NULL); |
3e4093b6 | 10277 | exp = default_conversion (exp); |
ca085fd7 MLI |
10278 | |
10279 | if (warn_sequence_point) | |
10280 | verify_sequence_points (exp); | |
3e4093b6 RS |
10281 | } |
10282 | } | |
10283 | ||
604f5adf | 10284 | /* Add this new SWITCH_EXPR to the stack. */ |
5d038c4c | 10285 | cs = XNEW (struct c_switch); |
9e851845 | 10286 | cs->switch_expr = build2 (SWITCH_EXPR, orig_type, exp, NULL_TREE); |
c2255bc4 | 10287 | SET_EXPR_LOCATION (cs->switch_expr, switch_loc); |
a6c0a76c | 10288 | cs->orig_type = orig_type; |
3e4093b6 | 10289 | cs->cases = splay_tree_new (case_compare, NULL, NULL); |
e1b7793c | 10290 | cs->bindings = c_get_switch_bindings (); |
b155cfd9 MP |
10291 | cs->bool_cond_p = bool_cond_p; |
10292 | cs->outside_range_p = false; | |
506e2710 RH |
10293 | cs->next = c_switch_stack; |
10294 | c_switch_stack = cs; | |
3e4093b6 | 10295 | |
604f5adf | 10296 | return add_stmt (cs->switch_expr); |
3e4093b6 RS |
10297 | } |
10298 | ||
c2255bc4 | 10299 | /* Process a case label at location LOC. */ |
3e4093b6 RS |
10300 | |
10301 | tree | |
c2255bc4 | 10302 | do_case (location_t loc, tree low_value, tree high_value) |
3e4093b6 RS |
10303 | { |
10304 | tree label = NULL_TREE; | |
10305 | ||
17cede2e JM |
10306 | if (low_value && TREE_CODE (low_value) != INTEGER_CST) |
10307 | { | |
10308 | low_value = c_fully_fold (low_value, false, NULL); | |
10309 | if (TREE_CODE (low_value) == INTEGER_CST) | |
d033409e | 10310 | pedwarn (loc, OPT_Wpedantic, |
17cede2e JM |
10311 | "case label is not an integer constant expression"); |
10312 | } | |
10313 | ||
10314 | if (high_value && TREE_CODE (high_value) != INTEGER_CST) | |
10315 | { | |
10316 | high_value = c_fully_fold (high_value, false, NULL); | |
10317 | if (TREE_CODE (high_value) == INTEGER_CST) | |
c1771a20 | 10318 | pedwarn (input_location, OPT_Wpedantic, |
17cede2e JM |
10319 | "case label is not an integer constant expression"); |
10320 | } | |
10321 | ||
e1b7793c | 10322 | if (c_switch_stack == NULL) |
187230a7 JM |
10323 | { |
10324 | if (low_value) | |
e1b7793c | 10325 | error_at (loc, "case label not within a switch statement"); |
187230a7 | 10326 | else |
e1b7793c ILT |
10327 | error_at (loc, "%<default%> label not within a switch statement"); |
10328 | return NULL_TREE; | |
187230a7 | 10329 | } |
de520661 | 10330 | |
e1b7793c ILT |
10331 | if (c_check_switch_jump_warnings (c_switch_stack->bindings, |
10332 | EXPR_LOCATION (c_switch_stack->switch_expr), | |
10333 | loc)) | |
10334 | return NULL_TREE; | |
10335 | ||
10336 | label = c_add_case_label (loc, c_switch_stack->cases, | |
10337 | SWITCH_COND (c_switch_stack->switch_expr), | |
10338 | c_switch_stack->orig_type, | |
b155cfd9 MP |
10339 | low_value, high_value, |
10340 | &c_switch_stack->outside_range_p); | |
e1b7793c ILT |
10341 | if (label == error_mark_node) |
10342 | label = NULL_TREE; | |
3e4093b6 RS |
10343 | return label; |
10344 | } | |
de520661 | 10345 | |
083e891e MP |
10346 | /* Finish the switch statement. TYPE is the original type of the |
10347 | controlling expression of the switch, or NULL_TREE. */ | |
de520661 | 10348 | |
3e4093b6 | 10349 | void |
083e891e | 10350 | c_finish_case (tree body, tree type) |
3e4093b6 | 10351 | { |
506e2710 | 10352 | struct c_switch *cs = c_switch_stack; |
fbc315db | 10353 | location_t switch_location; |
3e4093b6 | 10354 | |
604f5adf | 10355 | SWITCH_BODY (cs->switch_expr) = body; |
325c3691 | 10356 | |
6de9cd9a | 10357 | /* Emit warnings as needed. */ |
c2255bc4 | 10358 | switch_location = EXPR_LOCATION (cs->switch_expr); |
fbc315db | 10359 | c_do_switch_warnings (cs->cases, switch_location, |
083e891e | 10360 | type ? type : TREE_TYPE (cs->switch_expr), |
b155cfd9 MP |
10361 | SWITCH_COND (cs->switch_expr), |
10362 | cs->bool_cond_p, cs->outside_range_p); | |
6de9cd9a | 10363 | |
3e4093b6 | 10364 | /* Pop the stack. */ |
506e2710 | 10365 | c_switch_stack = cs->next; |
3e4093b6 | 10366 | splay_tree_delete (cs->cases); |
e1b7793c | 10367 | c_release_switch_bindings (cs->bindings); |
5d038c4c | 10368 | XDELETE (cs); |
de520661 | 10369 | } |
325c3691 | 10370 | \f |
506e2710 RH |
10371 | /* Emit an if statement. IF_LOCUS is the location of the 'if'. COND, |
10372 | THEN_BLOCK and ELSE_BLOCK are expressions to be used; ELSE_BLOCK | |
99cd9857 | 10373 | may be null. */ |
325c3691 | 10374 | |
9e51cf9d | 10375 | void |
506e2710 | 10376 | c_finish_if_stmt (location_t if_locus, tree cond, tree then_block, |
99cd9857 | 10377 | tree else_block) |
325c3691 | 10378 | { |
506e2710 | 10379 | tree stmt; |
325c3691 | 10380 | |
2214de30 | 10381 | stmt = build3 (COND_EXPR, void_type_node, cond, then_block, else_block); |
a281759f | 10382 | SET_EXPR_LOCATION (stmt, if_locus); |
506e2710 | 10383 | add_stmt (stmt); |
325c3691 RH |
10384 | } |
10385 | ||
506e2710 RH |
10386 | /* Emit a general-purpose loop construct. START_LOCUS is the location of |
10387 | the beginning of the loop. COND is the loop condition. COND_IS_FIRST | |
10388 | is false for DO loops. INCR is the FOR increment expression. BODY is | |
61ada8ae | 10389 | the statement controlled by the loop. BLAB is the break label. CLAB is |
506e2710 | 10390 | the continue label. Everything is allowed to be NULL. */ |
325c3691 RH |
10391 | |
10392 | void | |
506e2710 RH |
10393 | c_finish_loop (location_t start_locus, tree cond, tree incr, tree body, |
10394 | tree blab, tree clab, bool cond_is_first) | |
325c3691 | 10395 | { |
506e2710 RH |
10396 | tree entry = NULL, exit = NULL, t; |
10397 | ||
28af952a RS |
10398 | /* If the condition is zero don't generate a loop construct. */ |
10399 | if (cond && integer_zerop (cond)) | |
10400 | { | |
10401 | if (cond_is_first) | |
10402 | { | |
10403 | t = build_and_jump (&blab); | |
10404 | SET_EXPR_LOCATION (t, start_locus); | |
10405 | add_stmt (t); | |
10406 | } | |
10407 | } | |
10408 | else | |
506e2710 RH |
10409 | { |
10410 | tree top = build1 (LABEL_EXPR, void_type_node, NULL_TREE); | |
c22cacf3 | 10411 | |
506e2710 | 10412 | /* If we have an exit condition, then we build an IF with gotos either |
c22cacf3 MS |
10413 | out of the loop, or to the top of it. If there's no exit condition, |
10414 | then we just build a jump back to the top. */ | |
506e2710 | 10415 | exit = build_and_jump (&LABEL_EXPR_LABEL (top)); |
c22cacf3 | 10416 | |
28af952a | 10417 | if (cond && !integer_nonzerop (cond)) |
c22cacf3 MS |
10418 | { |
10419 | /* Canonicalize the loop condition to the end. This means | |
10420 | generating a branch to the loop condition. Reuse the | |
10421 | continue label, if possible. */ | |
10422 | if (cond_is_first) | |
10423 | { | |
10424 | if (incr || !clab) | |
10425 | { | |
10426 | entry = build1 (LABEL_EXPR, void_type_node, NULL_TREE); | |
10427 | t = build_and_jump (&LABEL_EXPR_LABEL (entry)); | |
10428 | } | |
10429 | else | |
10430 | t = build1 (GOTO_EXPR, void_type_node, clab); | |
a281759f | 10431 | SET_EXPR_LOCATION (t, start_locus); |
c22cacf3 MS |
10432 | add_stmt (t); |
10433 | } | |
10434 | ||
506e2710 | 10435 | t = build_and_jump (&blab); |
506e2710 | 10436 | if (cond_is_first) |
db3927fb AH |
10437 | exit = fold_build3_loc (start_locus, |
10438 | COND_EXPR, void_type_node, cond, exit, t); | |
506e2710 | 10439 | else |
db3927fb AH |
10440 | exit = fold_build3_loc (input_location, |
10441 | COND_EXPR, void_type_node, cond, exit, t); | |
c22cacf3 | 10442 | } |
fc402eec AA |
10443 | else |
10444 | { | |
10445 | /* For the backward-goto's location of an unconditional loop | |
10446 | use the beginning of the body, or, if there is none, the | |
10447 | top of the loop. */ | |
10448 | location_t loc = EXPR_LOCATION (expr_first (body)); | |
10449 | if (loc == UNKNOWN_LOCATION) | |
10450 | loc = start_locus; | |
10451 | SET_EXPR_LOCATION (exit, loc); | |
10452 | } | |
c22cacf3 | 10453 | |
506e2710 RH |
10454 | add_stmt (top); |
10455 | } | |
c22cacf3 | 10456 | |
506e2710 RH |
10457 | if (body) |
10458 | add_stmt (body); | |
10459 | if (clab) | |
10460 | add_stmt (build1 (LABEL_EXPR, void_type_node, clab)); | |
10461 | if (incr) | |
10462 | add_stmt (incr); | |
10463 | if (entry) | |
10464 | add_stmt (entry); | |
10465 | if (exit) | |
10466 | add_stmt (exit); | |
10467 | if (blab) | |
10468 | add_stmt (build1 (LABEL_EXPR, void_type_node, blab)); | |
325c3691 | 10469 | } |
325c3691 RH |
10470 | |
10471 | tree | |
c2255bc4 | 10472 | c_finish_bc_stmt (location_t loc, tree *label_p, bool is_break) |
325c3691 | 10473 | { |
089efaa4 | 10474 | bool skip; |
506e2710 | 10475 | tree label = *label_p; |
325c3691 | 10476 | |
089efaa4 ILT |
10477 | /* In switch statements break is sometimes stylistically used after |
10478 | a return statement. This can lead to spurious warnings about | |
10479 | control reaching the end of a non-void function when it is | |
10480 | inlined. Note that we are calling block_may_fallthru with | |
10481 | language specific tree nodes; this works because | |
10482 | block_may_fallthru returns true when given something it does not | |
10483 | understand. */ | |
10484 | skip = !block_may_fallthru (cur_stmt_list); | |
10485 | ||
506e2710 | 10486 | if (!label) |
089efaa4 ILT |
10487 | { |
10488 | if (!skip) | |
c2255bc4 | 10489 | *label_p = label = create_artificial_label (loc); |
089efaa4 | 10490 | } |
953ff289 DN |
10491 | else if (TREE_CODE (label) == LABEL_DECL) |
10492 | ; | |
10493 | else switch (TREE_INT_CST_LOW (label)) | |
506e2710 | 10494 | { |
953ff289 | 10495 | case 0: |
506e2710 | 10496 | if (is_break) |
c2255bc4 | 10497 | error_at (loc, "break statement not within loop or switch"); |
506e2710 | 10498 | else |
c2255bc4 | 10499 | error_at (loc, "continue statement not within a loop"); |
506e2710 | 10500 | return NULL_TREE; |
953ff289 DN |
10501 | |
10502 | case 1: | |
10503 | gcc_assert (is_break); | |
c2255bc4 | 10504 | error_at (loc, "break statement used with OpenMP for loop"); |
953ff289 DN |
10505 | return NULL_TREE; |
10506 | ||
c02065fc AH |
10507 | case 2: |
10508 | if (is_break) | |
10509 | error ("break statement within %<#pragma simd%> loop body"); | |
10510 | else | |
10511 | error ("continue statement within %<#pragma simd%> loop body"); | |
10512 | return NULL_TREE; | |
10513 | ||
953ff289 DN |
10514 | default: |
10515 | gcc_unreachable (); | |
506e2710 | 10516 | } |
325c3691 | 10517 | |
089efaa4 ILT |
10518 | if (skip) |
10519 | return NULL_TREE; | |
10520 | ||
2e28e797 JH |
10521 | if (!is_break) |
10522 | add_stmt (build_predict_expr (PRED_CONTINUE, NOT_TAKEN)); | |
10523 | ||
53fb4de3 | 10524 | return add_stmt (build1 (GOTO_EXPR, void_type_node, label)); |
325c3691 RH |
10525 | } |
10526 | ||
506e2710 | 10527 | /* A helper routine for c_process_expr_stmt and c_finish_stmt_expr. */ |
3a5b9284 RH |
10528 | |
10529 | static void | |
c2255bc4 | 10530 | emit_side_effect_warnings (location_t loc, tree expr) |
3a5b9284 | 10531 | { |
e6b5a630 RH |
10532 | if (expr == error_mark_node) |
10533 | ; | |
10534 | else if (!TREE_SIDE_EFFECTS (expr)) | |
3a5b9284 RH |
10535 | { |
10536 | if (!VOID_TYPE_P (TREE_TYPE (expr)) && !TREE_NO_WARNING (expr)) | |
c2255bc4 | 10537 | warning_at (loc, OPT_Wunused_value, "statement with no effect"); |
3a5b9284 | 10538 | } |
789eadcd MP |
10539 | else if (TREE_CODE (expr) == COMPOUND_EXPR) |
10540 | { | |
10541 | tree r = expr; | |
10542 | location_t cloc = loc; | |
10543 | while (TREE_CODE (r) == COMPOUND_EXPR) | |
10544 | { | |
10545 | if (EXPR_HAS_LOCATION (r)) | |
10546 | cloc = EXPR_LOCATION (r); | |
10547 | r = TREE_OPERAND (r, 1); | |
10548 | } | |
10549 | if (!TREE_SIDE_EFFECTS (r) | |
10550 | && !VOID_TYPE_P (TREE_TYPE (r)) | |
10551 | && !CONVERT_EXPR_P (r) | |
cc28fc7f | 10552 | && !TREE_NO_WARNING (r) |
789eadcd MP |
10553 | && !TREE_NO_WARNING (expr)) |
10554 | warning_at (cloc, OPT_Wunused_value, | |
10555 | "right-hand operand of comma expression has no effect"); | |
10556 | } | |
27f33b15 | 10557 | else |
c2255bc4 | 10558 | warn_if_unused_value (expr, loc); |
3a5b9284 RH |
10559 | } |
10560 | ||
506e2710 | 10561 | /* Process an expression as if it were a complete statement. Emit |
c2255bc4 AH |
10562 | diagnostics, but do not call ADD_STMT. LOC is the location of the |
10563 | statement. */ | |
3a5b9284 | 10564 | |
506e2710 | 10565 | tree |
c2255bc4 | 10566 | c_process_expr_stmt (location_t loc, tree expr) |
3a5b9284 | 10567 | { |
056928b2 JJ |
10568 | tree exprv; |
10569 | ||
3a5b9284 | 10570 | if (!expr) |
506e2710 | 10571 | return NULL_TREE; |
3a5b9284 | 10572 | |
928c19bb JM |
10573 | expr = c_fully_fold (expr, false, NULL); |
10574 | ||
3a5b9284 RH |
10575 | if (warn_sequence_point) |
10576 | verify_sequence_points (expr); | |
10577 | ||
10578 | if (TREE_TYPE (expr) != error_mark_node | |
10579 | && !COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (expr)) | |
10580 | && TREE_CODE (TREE_TYPE (expr)) != ARRAY_TYPE) | |
c2255bc4 | 10581 | error_at (loc, "expression statement has incomplete type"); |
3a5b9284 RH |
10582 | |
10583 | /* If we're not processing a statement expression, warn about unused values. | |
10584 | Warnings for statement expressions will be emitted later, once we figure | |
10585 | out which is the result. */ | |
10586 | if (!STATEMENT_LIST_STMT_EXPR (cur_stmt_list) | |
27f33b15 | 10587 | && warn_unused_value) |
d06f8b75 | 10588 | emit_side_effect_warnings (EXPR_LOC_OR_LOC (expr, loc), expr); |
3a5b9284 | 10589 | |
056928b2 JJ |
10590 | exprv = expr; |
10591 | while (TREE_CODE (exprv) == COMPOUND_EXPR) | |
10592 | exprv = TREE_OPERAND (exprv, 1); | |
f1a89dd0 JJ |
10593 | while (CONVERT_EXPR_P (exprv)) |
10594 | exprv = TREE_OPERAND (exprv, 0); | |
10595 | if (DECL_P (exprv) | |
10596 | || handled_component_p (exprv) | |
10597 | || TREE_CODE (exprv) == ADDR_EXPR) | |
056928b2 | 10598 | mark_exp_read (exprv); |
fa8351f8 | 10599 | |
3a5b9284 RH |
10600 | /* If the expression is not of a type to which we cannot assign a line |
10601 | number, wrap the thing in a no-op NOP_EXPR. */ | |
6615c446 | 10602 | if (DECL_P (expr) || CONSTANT_CLASS_P (expr)) |
c2255bc4 AH |
10603 | { |
10604 | expr = build1 (NOP_EXPR, TREE_TYPE (expr), expr); | |
10605 | SET_EXPR_LOCATION (expr, loc); | |
10606 | } | |
506e2710 RH |
10607 | |
10608 | return expr; | |
10609 | } | |
10610 | ||
c2255bc4 AH |
10611 | /* Emit an expression as a statement. LOC is the location of the |
10612 | expression. */ | |
506e2710 RH |
10613 | |
10614 | tree | |
c2255bc4 | 10615 | c_finish_expr_stmt (location_t loc, tree expr) |
506e2710 RH |
10616 | { |
10617 | if (expr) | |
c2255bc4 | 10618 | return add_stmt (c_process_expr_stmt (loc, expr)); |
506e2710 RH |
10619 | else |
10620 | return NULL; | |
3a5b9284 RH |
10621 | } |
10622 | ||
10623 | /* Do the opposite and emit a statement as an expression. To begin, | |
10624 | create a new binding level and return it. */ | |
325c3691 RH |
10625 | |
10626 | tree | |
10627 | c_begin_stmt_expr (void) | |
10628 | { | |
10629 | tree ret; | |
10630 | ||
10631 | /* We must force a BLOCK for this level so that, if it is not expanded | |
10632 | later, there is a way to turn off the entire subtree of blocks that | |
10633 | are contained in it. */ | |
10634 | keep_next_level (); | |
10635 | ret = c_begin_compound_stmt (true); | |
e1b7793c ILT |
10636 | |
10637 | c_bindings_start_stmt_expr (c_switch_stack == NULL | |
10638 | ? NULL | |
10639 | : c_switch_stack->bindings); | |
325c3691 RH |
10640 | |
10641 | /* Mark the current statement list as belonging to a statement list. */ | |
10642 | STATEMENT_LIST_STMT_EXPR (ret) = 1; | |
10643 | ||
10644 | return ret; | |
10645 | } | |
10646 | ||
c2255bc4 AH |
10647 | /* LOC is the location of the compound statement to which this body |
10648 | belongs. */ | |
10649 | ||
325c3691 | 10650 | tree |
c2255bc4 | 10651 | c_finish_stmt_expr (location_t loc, tree body) |
325c3691 | 10652 | { |
3a5b9284 | 10653 | tree last, type, tmp, val; |
325c3691 RH |
10654 | tree *last_p; |
10655 | ||
c2255bc4 | 10656 | body = c_end_compound_stmt (loc, body, true); |
e1b7793c ILT |
10657 | |
10658 | c_bindings_end_stmt_expr (c_switch_stack == NULL | |
10659 | ? NULL | |
10660 | : c_switch_stack->bindings); | |
325c3691 | 10661 | |
3a5b9284 RH |
10662 | /* Locate the last statement in BODY. See c_end_compound_stmt |
10663 | about always returning a BIND_EXPR. */ | |
10664 | last_p = &BIND_EXPR_BODY (body); | |
10665 | last = BIND_EXPR_BODY (body); | |
10666 | ||
10667 | continue_searching: | |
325c3691 RH |
10668 | if (TREE_CODE (last) == STATEMENT_LIST) |
10669 | { | |
3a5b9284 RH |
10670 | tree_stmt_iterator i; |
10671 | ||
10672 | /* This can happen with degenerate cases like ({ }). No value. */ | |
10673 | if (!TREE_SIDE_EFFECTS (last)) | |
10674 | return body; | |
10675 | ||
10676 | /* If we're supposed to generate side effects warnings, process | |
10677 | all of the statements except the last. */ | |
27f33b15 | 10678 | if (warn_unused_value) |
325c3691 | 10679 | { |
3a5b9284 | 10680 | for (i = tsi_start (last); !tsi_one_before_end_p (i); tsi_next (&i)) |
c2255bc4 AH |
10681 | { |
10682 | location_t tloc; | |
10683 | tree t = tsi_stmt (i); | |
10684 | ||
10685 | tloc = EXPR_HAS_LOCATION (t) ? EXPR_LOCATION (t) : loc; | |
10686 | emit_side_effect_warnings (tloc, t); | |
10687 | } | |
325c3691 RH |
10688 | } |
10689 | else | |
3a5b9284 RH |
10690 | i = tsi_last (last); |
10691 | last_p = tsi_stmt_ptr (i); | |
10692 | last = *last_p; | |
325c3691 RH |
10693 | } |
10694 | ||
3a5b9284 RH |
10695 | /* If the end of the list is exception related, then the list was split |
10696 | by a call to push_cleanup. Continue searching. */ | |
10697 | if (TREE_CODE (last) == TRY_FINALLY_EXPR | |
10698 | || TREE_CODE (last) == TRY_CATCH_EXPR) | |
10699 | { | |
10700 | last_p = &TREE_OPERAND (last, 0); | |
10701 | last = *last_p; | |
10702 | goto continue_searching; | |
10703 | } | |
10704 | ||
26d8af35 JM |
10705 | if (last == error_mark_node) |
10706 | return last; | |
10707 | ||
3a5b9284 RH |
10708 | /* In the case that the BIND_EXPR is not necessary, return the |
10709 | expression out from inside it. */ | |
26d8af35 JM |
10710 | if (last == BIND_EXPR_BODY (body) |
10711 | && BIND_EXPR_VARS (body) == NULL) | |
591baeb0 | 10712 | { |
928c19bb JM |
10713 | /* Even if this looks constant, do not allow it in a constant |
10714 | expression. */ | |
e5a94231 | 10715 | last = c_wrap_maybe_const (last, true); |
591baeb0 JM |
10716 | /* Do not warn if the return value of a statement expression is |
10717 | unused. */ | |
928c19bb | 10718 | TREE_NO_WARNING (last) = 1; |
591baeb0 JM |
10719 | return last; |
10720 | } | |
325c3691 RH |
10721 | |
10722 | /* Extract the type of said expression. */ | |
10723 | type = TREE_TYPE (last); | |
325c3691 | 10724 | |
3a5b9284 RH |
10725 | /* If we're not returning a value at all, then the BIND_EXPR that |
10726 | we already have is a fine expression to return. */ | |
10727 | if (!type || VOID_TYPE_P (type)) | |
10728 | return body; | |
10729 | ||
10730 | /* Now that we've located the expression containing the value, it seems | |
10731 | silly to make voidify_wrapper_expr repeat the process. Create a | |
10732 | temporary of the appropriate type and stick it in a TARGET_EXPR. */ | |
b731b390 | 10733 | tmp = create_tmp_var_raw (type); |
3a5b9284 RH |
10734 | |
10735 | /* Unwrap a no-op NOP_EXPR as added by c_finish_expr_stmt. This avoids | |
10736 | tree_expr_nonnegative_p giving up immediately. */ | |
10737 | val = last; | |
10738 | if (TREE_CODE (val) == NOP_EXPR | |
10739 | && TREE_TYPE (val) == TREE_TYPE (TREE_OPERAND (val, 0))) | |
10740 | val = TREE_OPERAND (val, 0); | |
10741 | ||
53fb4de3 | 10742 | *last_p = build2 (MODIFY_EXPR, void_type_node, tmp, val); |
5e278028 | 10743 | SET_EXPR_LOCATION (*last_p, EXPR_LOCATION (last)); |
3a5b9284 | 10744 | |
c2255bc4 AH |
10745 | { |
10746 | tree t = build4 (TARGET_EXPR, type, tmp, body, NULL_TREE, NULL_TREE); | |
10747 | SET_EXPR_LOCATION (t, loc); | |
10748 | return t; | |
10749 | } | |
325c3691 RH |
10750 | } |
10751 | \f | |
10752 | /* Begin and end compound statements. This is as simple as pushing | |
10753 | and popping new statement lists from the tree. */ | |
10754 | ||
10755 | tree | |
10756 | c_begin_compound_stmt (bool do_scope) | |
10757 | { | |
10758 | tree stmt = push_stmt_list (); | |
10759 | if (do_scope) | |
4dfa0342 | 10760 | push_scope (); |
325c3691 RH |
10761 | return stmt; |
10762 | } | |
10763 | ||
c2255bc4 AH |
10764 | /* End a compound statement. STMT is the statement. LOC is the |
10765 | location of the compound statement-- this is usually the location | |
10766 | of the opening brace. */ | |
10767 | ||
325c3691 | 10768 | tree |
c2255bc4 | 10769 | c_end_compound_stmt (location_t loc, tree stmt, bool do_scope) |
325c3691 RH |
10770 | { |
10771 | tree block = NULL; | |
10772 | ||
10773 | if (do_scope) | |
10774 | { | |
10775 | if (c_dialect_objc ()) | |
10776 | objc_clear_super_receiver (); | |
10777 | block = pop_scope (); | |
10778 | } | |
10779 | ||
10780 | stmt = pop_stmt_list (stmt); | |
c2255bc4 | 10781 | stmt = c_build_bind_expr (loc, block, stmt); |
325c3691 RH |
10782 | |
10783 | /* If this compound statement is nested immediately inside a statement | |
10784 | expression, then force a BIND_EXPR to be created. Otherwise we'll | |
10785 | do the wrong thing for ({ { 1; } }) or ({ 1; { } }). In particular, | |
10786 | STATEMENT_LISTs merge, and thus we can lose track of what statement | |
10787 | was really last. */ | |
38e01f9e | 10788 | if (building_stmt_list_p () |
325c3691 RH |
10789 | && STATEMENT_LIST_STMT_EXPR (cur_stmt_list) |
10790 | && TREE_CODE (stmt) != BIND_EXPR) | |
10791 | { | |
53fb4de3 | 10792 | stmt = build3 (BIND_EXPR, void_type_node, NULL, stmt, NULL); |
325c3691 | 10793 | TREE_SIDE_EFFECTS (stmt) = 1; |
c2255bc4 | 10794 | SET_EXPR_LOCATION (stmt, loc); |
325c3691 RH |
10795 | } |
10796 | ||
10797 | return stmt; | |
10798 | } | |
5a508662 RH |
10799 | |
10800 | /* Queue a cleanup. CLEANUP is an expression/statement to be executed | |
10801 | when the current scope is exited. EH_ONLY is true when this is not | |
10802 | meant to apply to normal control flow transfer. */ | |
10803 | ||
10804 | void | |
c2255bc4 | 10805 | push_cleanup (tree decl, tree cleanup, bool eh_only) |
5a508662 | 10806 | { |
3a5b9284 RH |
10807 | enum tree_code code; |
10808 | tree stmt, list; | |
10809 | bool stmt_expr; | |
10810 | ||
10811 | code = eh_only ? TRY_CATCH_EXPR : TRY_FINALLY_EXPR; | |
c2255bc4 | 10812 | stmt = build_stmt (DECL_SOURCE_LOCATION (decl), code, NULL, cleanup); |
5a508662 | 10813 | add_stmt (stmt); |
3a5b9284 RH |
10814 | stmt_expr = STATEMENT_LIST_STMT_EXPR (cur_stmt_list); |
10815 | list = push_stmt_list (); | |
10816 | TREE_OPERAND (stmt, 0) = list; | |
10817 | STATEMENT_LIST_STMT_EXPR (list) = stmt_expr; | |
5a508662 | 10818 | } |
325c3691 | 10819 | \f |
9f47c7e5 IE |
10820 | /* Build a vector comparison of ARG0 and ARG1 using CODE opcode |
10821 | into a value of TYPE type. Comparison is done via VEC_COND_EXPR. */ | |
10822 | ||
10823 | static tree | |
10824 | build_vec_cmp (tree_code code, tree type, | |
10825 | tree arg0, tree arg1) | |
10826 | { | |
10827 | tree zero_vec = build_zero_cst (type); | |
10828 | tree minus_one_vec = build_minus_one_cst (type); | |
10829 | tree cmp_type = build_same_sized_truth_vector_type (type); | |
10830 | tree cmp = build2 (code, cmp_type, arg0, arg1); | |
10831 | return build3 (VEC_COND_EXPR, type, cmp, minus_one_vec, zero_vec); | |
10832 | } | |
10833 | ||
3e4093b6 RS |
10834 | /* Build a binary-operation expression without default conversions. |
10835 | CODE is the kind of expression to build. | |
ba47d38d | 10836 | LOCATION is the operator's location. |
3e4093b6 RS |
10837 | This function differs from `build' in several ways: |
10838 | the data type of the result is computed and recorded in it, | |
10839 | warnings are generated if arg data types are invalid, | |
10840 | special handling for addition and subtraction of pointers is known, | |
10841 | and some optimization is done (operations on narrow ints | |
10842 | are done in the narrower type when that gives the same result). | |
10843 | Constant folding is also done before the result is returned. | |
de520661 | 10844 | |
3e4093b6 RS |
10845 | Note that the operands will never have enumeral types, or function |
10846 | or array types, because either they will have the default conversions | |
10847 | performed or they have both just been converted to some other type in which | |
10848 | the arithmetic is to be done. */ | |
10849 | ||
10850 | tree | |
ba47d38d | 10851 | build_binary_op (location_t location, enum tree_code code, |
30af3a2b | 10852 | tree orig_op0, tree orig_op1, bool convert_p) |
de520661 | 10853 | { |
8ce94e44 JM |
10854 | tree type0, type1, orig_type0, orig_type1; |
10855 | tree eptype; | |
3e4093b6 RS |
10856 | enum tree_code code0, code1; |
10857 | tree op0, op1; | |
c9f9eb5d | 10858 | tree ret = error_mark_node; |
4de67c26 | 10859 | const char *invalid_op_diag; |
4d84fe7c | 10860 | bool op0_int_operands, op1_int_operands; |
928c19bb | 10861 | bool int_const, int_const_or_overflow, int_operands; |
b62acd60 | 10862 | |
3e4093b6 RS |
10863 | /* Expression code to give to the expression when it is built. |
10864 | Normally this is CODE, which is what the caller asked for, | |
10865 | but in some special cases we change it. */ | |
10866 | enum tree_code resultcode = code; | |
8b6a5902 | 10867 | |
3e4093b6 RS |
10868 | /* Data type in which the computation is to be performed. |
10869 | In the simplest cases this is the common type of the arguments. */ | |
10870 | tree result_type = NULL; | |
10871 | ||
8ce94e44 JM |
10872 | /* When the computation is in excess precision, the type of the |
10873 | final EXCESS_PRECISION_EXPR. */ | |
2d2e923f | 10874 | tree semantic_result_type = NULL; |
8ce94e44 | 10875 | |
3e4093b6 RS |
10876 | /* Nonzero means operands have already been type-converted |
10877 | in whatever way is necessary. | |
10878 | Zero means they need to be converted to RESULT_TYPE. */ | |
10879 | int converted = 0; | |
10880 | ||
10881 | /* Nonzero means create the expression with this type, rather than | |
10882 | RESULT_TYPE. */ | |
3fa8871b | 10883 | tree build_type = NULL_TREE; |
3e4093b6 RS |
10884 | |
10885 | /* Nonzero means after finally constructing the expression | |
10886 | convert it to this type. */ | |
3fa8871b | 10887 | tree final_type = NULL_TREE; |
3e4093b6 RS |
10888 | |
10889 | /* Nonzero if this is an operation like MIN or MAX which can | |
10890 | safely be computed in short if both args are promoted shorts. | |
10891 | Also implies COMMON. | |
10892 | -1 indicates a bitwise operation; this makes a difference | |
10893 | in the exact conditions for when it is safe to do the operation | |
10894 | in a narrower mode. */ | |
10895 | int shorten = 0; | |
10896 | ||
10897 | /* Nonzero if this is a comparison operation; | |
10898 | if both args are promoted shorts, compare the original shorts. | |
10899 | Also implies COMMON. */ | |
10900 | int short_compare = 0; | |
10901 | ||
10902 | /* Nonzero if this is a right-shift operation, which can be computed on the | |
10903 | original short and then promoted if the operand is a promoted short. */ | |
10904 | int short_shift = 0; | |
10905 | ||
10906 | /* Nonzero means set RESULT_TYPE to the common type of the args. */ | |
10907 | int common = 0; | |
10908 | ||
58393038 ZL |
10909 | /* True means types are compatible as far as ObjC is concerned. */ |
10910 | bool objc_ok; | |
10911 | ||
8ce94e44 JM |
10912 | /* True means this is an arithmetic operation that may need excess |
10913 | precision. */ | |
10914 | bool may_need_excess_precision; | |
10915 | ||
180f8dbb JM |
10916 | /* True means this is a boolean operation that converts both its |
10917 | operands to truth-values. */ | |
10918 | bool boolean_op = false; | |
10919 | ||
de5a5fa1 MP |
10920 | /* Remember whether we're doing / or %. */ |
10921 | bool doing_div_or_mod = false; | |
10922 | ||
10923 | /* Remember whether we're doing << or >>. */ | |
10924 | bool doing_shift = false; | |
10925 | ||
10926 | /* Tree holding instrumentation expression. */ | |
10927 | tree instrument_expr = NULL; | |
10928 | ||
ba47d38d AH |
10929 | if (location == UNKNOWN_LOCATION) |
10930 | location = input_location; | |
10931 | ||
4d84fe7c JM |
10932 | op0 = orig_op0; |
10933 | op1 = orig_op1; | |
10934 | ||
10935 | op0_int_operands = EXPR_INT_CONST_OPERANDS (orig_op0); | |
10936 | if (op0_int_operands) | |
10937 | op0 = remove_c_maybe_const_expr (op0); | |
10938 | op1_int_operands = EXPR_INT_CONST_OPERANDS (orig_op1); | |
10939 | if (op1_int_operands) | |
10940 | op1 = remove_c_maybe_const_expr (op1); | |
10941 | int_operands = (op0_int_operands && op1_int_operands); | |
928c19bb JM |
10942 | if (int_operands) |
10943 | { | |
10944 | int_const_or_overflow = (TREE_CODE (orig_op0) == INTEGER_CST | |
10945 | && TREE_CODE (orig_op1) == INTEGER_CST); | |
10946 | int_const = (int_const_or_overflow | |
10947 | && !TREE_OVERFLOW (orig_op0) | |
10948 | && !TREE_OVERFLOW (orig_op1)); | |
10949 | } | |
10950 | else | |
10951 | int_const = int_const_or_overflow = false; | |
10952 | ||
0e3a99ae | 10953 | /* Do not apply default conversion in mixed vector/scalar expression. */ |
f90e8e2e | 10954 | if (convert_p |
31521951 | 10955 | && VECTOR_TYPE_P (TREE_TYPE (op0)) == VECTOR_TYPE_P (TREE_TYPE (op1))) |
790e9490 | 10956 | { |
4d84fe7c JM |
10957 | op0 = default_conversion (op0); |
10958 | op1 = default_conversion (op1); | |
790e9490 RS |
10959 | } |
10960 | ||
5e9d6aa4 | 10961 | orig_type0 = type0 = TREE_TYPE (op0); |
36536d79 | 10962 | |
5e9d6aa4 | 10963 | orig_type1 = type1 = TREE_TYPE (op1); |
91fa3c30 | 10964 | |
3e4093b6 RS |
10965 | /* The expression codes of the data types of the arguments tell us |
10966 | whether the arguments are integers, floating, pointers, etc. */ | |
10967 | code0 = TREE_CODE (type0); | |
10968 | code1 = TREE_CODE (type1); | |
10969 | ||
10970 | /* Strip NON_LVALUE_EXPRs, etc., since we aren't using as an lvalue. */ | |
10971 | STRIP_TYPE_NOPS (op0); | |
10972 | STRIP_TYPE_NOPS (op1); | |
10973 | ||
10974 | /* If an error was already reported for one of the arguments, | |
10975 | avoid reporting another error. */ | |
10976 | ||
10977 | if (code0 == ERROR_MARK || code1 == ERROR_MARK) | |
10978 | return error_mark_node; | |
10979 | ||
1807ffc1 MS |
10980 | if (code0 == POINTER_TYPE |
10981 | && reject_gcc_builtin (op0, EXPR_LOCATION (orig_op0))) | |
10982 | return error_mark_node; | |
10983 | ||
10984 | if (code1 == POINTER_TYPE | |
10985 | && reject_gcc_builtin (op1, EXPR_LOCATION (orig_op1))) | |
10986 | return error_mark_node; | |
10987 | ||
4de67c26 JM |
10988 | if ((invalid_op_diag |
10989 | = targetm.invalid_binary_op (code, type0, type1))) | |
10990 | { | |
ba47d38d | 10991 | error_at (location, invalid_op_diag); |
4de67c26 JM |
10992 | return error_mark_node; |
10993 | } | |
10994 | ||
8ce94e44 JM |
10995 | switch (code) |
10996 | { | |
10997 | case PLUS_EXPR: | |
10998 | case MINUS_EXPR: | |
10999 | case MULT_EXPR: | |
11000 | case TRUNC_DIV_EXPR: | |
11001 | case CEIL_DIV_EXPR: | |
11002 | case FLOOR_DIV_EXPR: | |
11003 | case ROUND_DIV_EXPR: | |
11004 | case EXACT_DIV_EXPR: | |
11005 | may_need_excess_precision = true; | |
11006 | break; | |
11007 | default: | |
11008 | may_need_excess_precision = false; | |
11009 | break; | |
11010 | } | |
11011 | if (TREE_CODE (op0) == EXCESS_PRECISION_EXPR) | |
11012 | { | |
11013 | op0 = TREE_OPERAND (op0, 0); | |
11014 | type0 = TREE_TYPE (op0); | |
11015 | } | |
11016 | else if (may_need_excess_precision | |
11017 | && (eptype = excess_precision_type (type0)) != NULL_TREE) | |
11018 | { | |
11019 | type0 = eptype; | |
11020 | op0 = convert (eptype, op0); | |
11021 | } | |
11022 | if (TREE_CODE (op1) == EXCESS_PRECISION_EXPR) | |
11023 | { | |
11024 | op1 = TREE_OPERAND (op1, 0); | |
11025 | type1 = TREE_TYPE (op1); | |
11026 | } | |
11027 | else if (may_need_excess_precision | |
11028 | && (eptype = excess_precision_type (type1)) != NULL_TREE) | |
11029 | { | |
11030 | type1 = eptype; | |
11031 | op1 = convert (eptype, op1); | |
11032 | } | |
11033 | ||
58393038 ZL |
11034 | objc_ok = objc_compare_types (type0, type1, -3, NULL_TREE); |
11035 | ||
0e3a99ae AS |
11036 | /* In case when one of the operands of the binary operation is |
11037 | a vector and another is a scalar -- convert scalar to vector. */ | |
11038 | if ((code0 == VECTOR_TYPE) != (code1 == VECTOR_TYPE)) | |
11039 | { | |
a212e43f MG |
11040 | enum stv_conv convert_flag = scalar_to_vector (location, code, op0, op1, |
11041 | true); | |
f90e8e2e | 11042 | |
0e3a99ae AS |
11043 | switch (convert_flag) |
11044 | { | |
11045 | case stv_error: | |
11046 | return error_mark_node; | |
11047 | case stv_firstarg: | |
11048 | { | |
11049 | bool maybe_const = true; | |
11050 | tree sc; | |
11051 | sc = c_fully_fold (op0, false, &maybe_const); | |
11052 | sc = save_expr (sc); | |
11053 | sc = convert (TREE_TYPE (type1), sc); | |
11054 | op0 = build_vector_from_val (type1, sc); | |
11055 | if (!maybe_const) | |
11056 | op0 = c_wrap_maybe_const (op0, true); | |
11057 | orig_type0 = type0 = TREE_TYPE (op0); | |
11058 | code0 = TREE_CODE (type0); | |
11059 | converted = 1; | |
11060 | break; | |
11061 | } | |
11062 | case stv_secondarg: | |
11063 | { | |
11064 | bool maybe_const = true; | |
11065 | tree sc; | |
11066 | sc = c_fully_fold (op1, false, &maybe_const); | |
11067 | sc = save_expr (sc); | |
11068 | sc = convert (TREE_TYPE (type0), sc); | |
11069 | op1 = build_vector_from_val (type0, sc); | |
11070 | if (!maybe_const) | |
54b9f838 | 11071 | op1 = c_wrap_maybe_const (op1, true); |
0e3a99ae AS |
11072 | orig_type1 = type1 = TREE_TYPE (op1); |
11073 | code1 = TREE_CODE (type1); | |
11074 | converted = 1; | |
11075 | break; | |
11076 | } | |
11077 | default: | |
11078 | break; | |
11079 | } | |
11080 | } | |
11081 | ||
3e4093b6 | 11082 | switch (code) |
de520661 | 11083 | { |
3e4093b6 RS |
11084 | case PLUS_EXPR: |
11085 | /* Handle the pointer + int case. */ | |
11086 | if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE) | |
c9f9eb5d | 11087 | { |
db3927fb | 11088 | ret = pointer_int_sum (location, PLUS_EXPR, op0, op1); |
c9f9eb5d AH |
11089 | goto return_build_binary_op; |
11090 | } | |
3e4093b6 | 11091 | else if (code1 == POINTER_TYPE && code0 == INTEGER_TYPE) |
c9f9eb5d | 11092 | { |
db3927fb | 11093 | ret = pointer_int_sum (location, PLUS_EXPR, op1, op0); |
c9f9eb5d AH |
11094 | goto return_build_binary_op; |
11095 | } | |
fe67cf58 | 11096 | else |
3e4093b6 RS |
11097 | common = 1; |
11098 | break; | |
400fbf9f | 11099 | |
3e4093b6 RS |
11100 | case MINUS_EXPR: |
11101 | /* Subtraction of two similar pointers. | |
11102 | We must subtract them as integers, then divide by object size. */ | |
11103 | if (code0 == POINTER_TYPE && code1 == POINTER_TYPE | |
744aa42f | 11104 | && comp_target_types (location, type0, type1)) |
c9f9eb5d | 11105 | { |
db3927fb | 11106 | ret = pointer_diff (location, op0, op1); |
c9f9eb5d AH |
11107 | goto return_build_binary_op; |
11108 | } | |
3e4093b6 RS |
11109 | /* Handle pointer minus int. Just like pointer plus int. */ |
11110 | else if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE) | |
c9f9eb5d | 11111 | { |
db3927fb | 11112 | ret = pointer_int_sum (location, MINUS_EXPR, op0, op1); |
c9f9eb5d AH |
11113 | goto return_build_binary_op; |
11114 | } | |
3e4093b6 RS |
11115 | else |
11116 | common = 1; | |
11117 | break; | |
8b6a5902 | 11118 | |
3e4093b6 RS |
11119 | case MULT_EXPR: |
11120 | common = 1; | |
11121 | break; | |
11122 | ||
11123 | case TRUNC_DIV_EXPR: | |
11124 | case CEIL_DIV_EXPR: | |
11125 | case FLOOR_DIV_EXPR: | |
11126 | case ROUND_DIV_EXPR: | |
11127 | case EXACT_DIV_EXPR: | |
de5a5fa1 | 11128 | doing_div_or_mod = true; |
c9f9eb5d | 11129 | warn_for_div_by_zero (location, op1); |
3e4093b6 RS |
11130 | |
11131 | if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE | |
ab22c1fa | 11132 | || code0 == FIXED_POINT_TYPE |
3e4093b6 RS |
11133 | || code0 == COMPLEX_TYPE || code0 == VECTOR_TYPE) |
11134 | && (code1 == INTEGER_TYPE || code1 == REAL_TYPE | |
ab22c1fa | 11135 | || code1 == FIXED_POINT_TYPE |
3e4093b6 | 11136 | || code1 == COMPLEX_TYPE || code1 == VECTOR_TYPE)) |
400fbf9f | 11137 | { |
5bed876a AH |
11138 | enum tree_code tcode0 = code0, tcode1 = code1; |
11139 | ||
3a021db2 | 11140 | if (code0 == COMPLEX_TYPE || code0 == VECTOR_TYPE) |
5bed876a | 11141 | tcode0 = TREE_CODE (TREE_TYPE (TREE_TYPE (op0))); |
3a021db2 | 11142 | if (code1 == COMPLEX_TYPE || code1 == VECTOR_TYPE) |
5bed876a | 11143 | tcode1 = TREE_CODE (TREE_TYPE (TREE_TYPE (op1))); |
3a021db2 | 11144 | |
ab22c1fa CF |
11145 | if (!((tcode0 == INTEGER_TYPE && tcode1 == INTEGER_TYPE) |
11146 | || (tcode0 == FIXED_POINT_TYPE && tcode1 == FIXED_POINT_TYPE))) | |
3e4093b6 RS |
11147 | resultcode = RDIV_EXPR; |
11148 | else | |
11149 | /* Although it would be tempting to shorten always here, that | |
11150 | loses on some targets, since the modulo instruction is | |
11151 | undefined if the quotient can't be represented in the | |
11152 | computation mode. We shorten only if unsigned or if | |
11153 | dividing by something we know != -1. */ | |
8df83eae | 11154 | shorten = (TYPE_UNSIGNED (TREE_TYPE (orig_op0)) |
3e4093b6 | 11155 | || (TREE_CODE (op1) == INTEGER_CST |
3f75a254 | 11156 | && !integer_all_onesp (op1))); |
3e4093b6 RS |
11157 | common = 1; |
11158 | } | |
11159 | break; | |
de520661 | 11160 | |
3e4093b6 | 11161 | case BIT_AND_EXPR: |
3e4093b6 RS |
11162 | case BIT_IOR_EXPR: |
11163 | case BIT_XOR_EXPR: | |
11164 | if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE) | |
11165 | shorten = -1; | |
9ef0c8d9 AP |
11166 | /* Allow vector types which are not floating point types. */ |
11167 | else if (code0 == VECTOR_TYPE | |
11168 | && code1 == VECTOR_TYPE | |
11169 | && !VECTOR_FLOAT_TYPE_P (type0) | |
11170 | && !VECTOR_FLOAT_TYPE_P (type1)) | |
3e4093b6 RS |
11171 | common = 1; |
11172 | break; | |
11173 | ||
11174 | case TRUNC_MOD_EXPR: | |
11175 | case FLOOR_MOD_EXPR: | |
de5a5fa1 | 11176 | doing_div_or_mod = true; |
c9f9eb5d | 11177 | warn_for_div_by_zero (location, op1); |
de520661 | 11178 | |
5cfd5d9b AP |
11179 | if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE |
11180 | && TREE_CODE (TREE_TYPE (type0)) == INTEGER_TYPE | |
11181 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE) | |
11182 | common = 1; | |
11183 | else if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE) | |
3e4093b6 RS |
11184 | { |
11185 | /* Although it would be tempting to shorten always here, that loses | |
11186 | on some targets, since the modulo instruction is undefined if the | |
11187 | quotient can't be represented in the computation mode. We shorten | |
11188 | only if unsigned or if dividing by something we know != -1. */ | |
8df83eae | 11189 | shorten = (TYPE_UNSIGNED (TREE_TYPE (orig_op0)) |
3e4093b6 | 11190 | || (TREE_CODE (op1) == INTEGER_CST |
3f75a254 | 11191 | && !integer_all_onesp (op1))); |
3e4093b6 RS |
11192 | common = 1; |
11193 | } | |
11194 | break; | |
de520661 | 11195 | |
3e4093b6 RS |
11196 | case TRUTH_ANDIF_EXPR: |
11197 | case TRUTH_ORIF_EXPR: | |
11198 | case TRUTH_AND_EXPR: | |
11199 | case TRUTH_OR_EXPR: | |
11200 | case TRUTH_XOR_EXPR: | |
11201 | if ((code0 == INTEGER_TYPE || code0 == POINTER_TYPE | |
ab22c1fa CF |
11202 | || code0 == REAL_TYPE || code0 == COMPLEX_TYPE |
11203 | || code0 == FIXED_POINT_TYPE) | |
3e4093b6 | 11204 | && (code1 == INTEGER_TYPE || code1 == POINTER_TYPE |
ab22c1fa CF |
11205 | || code1 == REAL_TYPE || code1 == COMPLEX_TYPE |
11206 | || code1 == FIXED_POINT_TYPE)) | |
3e4093b6 RS |
11207 | { |
11208 | /* Result of these operations is always an int, | |
11209 | but that does not mean the operands should be | |
11210 | converted to ints! */ | |
11211 | result_type = integer_type_node; | |
a27d595d JM |
11212 | if (op0_int_operands) |
11213 | { | |
11214 | op0 = c_objc_common_truthvalue_conversion (location, orig_op0); | |
11215 | op0 = remove_c_maybe_const_expr (op0); | |
11216 | } | |
11217 | else | |
11218 | op0 = c_objc_common_truthvalue_conversion (location, op0); | |
11219 | if (op1_int_operands) | |
11220 | { | |
11221 | op1 = c_objc_common_truthvalue_conversion (location, orig_op1); | |
11222 | op1 = remove_c_maybe_const_expr (op1); | |
11223 | } | |
11224 | else | |
11225 | op1 = c_objc_common_truthvalue_conversion (location, op1); | |
3e4093b6 | 11226 | converted = 1; |
180f8dbb | 11227 | boolean_op = true; |
3e4093b6 | 11228 | } |
928c19bb JM |
11229 | if (code == TRUTH_ANDIF_EXPR) |
11230 | { | |
11231 | int_const_or_overflow = (int_operands | |
11232 | && TREE_CODE (orig_op0) == INTEGER_CST | |
11233 | && (op0 == truthvalue_false_node | |
11234 | || TREE_CODE (orig_op1) == INTEGER_CST)); | |
11235 | int_const = (int_const_or_overflow | |
11236 | && !TREE_OVERFLOW (orig_op0) | |
11237 | && (op0 == truthvalue_false_node | |
11238 | || !TREE_OVERFLOW (orig_op1))); | |
11239 | } | |
11240 | else if (code == TRUTH_ORIF_EXPR) | |
11241 | { | |
11242 | int_const_or_overflow = (int_operands | |
11243 | && TREE_CODE (orig_op0) == INTEGER_CST | |
11244 | && (op0 == truthvalue_true_node | |
11245 | || TREE_CODE (orig_op1) == INTEGER_CST)); | |
11246 | int_const = (int_const_or_overflow | |
11247 | && !TREE_OVERFLOW (orig_op0) | |
11248 | && (op0 == truthvalue_true_node | |
11249 | || !TREE_OVERFLOW (orig_op1))); | |
11250 | } | |
3e4093b6 | 11251 | break; |
eba80994 | 11252 | |
3e4093b6 RS |
11253 | /* Shift operations: result has same type as first operand; |
11254 | always convert second operand to int. | |
11255 | Also set SHORT_SHIFT if shifting rightward. */ | |
de520661 | 11256 | |
3e4093b6 | 11257 | case RSHIFT_EXPR: |
76e2c821 JB |
11258 | if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE |
11259 | && TREE_CODE (TREE_TYPE (type0)) == INTEGER_TYPE | |
11260 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE | |
11261 | && TYPE_VECTOR_SUBPARTS (type0) == TYPE_VECTOR_SUBPARTS (type1)) | |
f87bd04b AS |
11262 | { |
11263 | result_type = type0; | |
11264 | converted = 1; | |
11265 | } | |
76e2c821 JB |
11266 | else if ((code0 == INTEGER_TYPE || code0 == FIXED_POINT_TYPE |
11267 | || code0 == VECTOR_TYPE) | |
451b5e48 | 11268 | && code1 == INTEGER_TYPE) |
3e4093b6 | 11269 | { |
de5a5fa1 | 11270 | doing_shift = true; |
928c19bb | 11271 | if (TREE_CODE (op1) == INTEGER_CST) |
b62acd60 | 11272 | { |
3e4093b6 | 11273 | if (tree_int_cst_sgn (op1) < 0) |
928c19bb JM |
11274 | { |
11275 | int_const = false; | |
7d882b83 | 11276 | if (c_inhibit_evaluation_warnings == 0) |
13c21655 PC |
11277 | warning_at (location, OPT_Wshift_count_negative, |
11278 | "right shift count is negative"); | |
928c19bb | 11279 | } |
76e2c821 JB |
11280 | else if (code0 == VECTOR_TYPE) |
11281 | { | |
11282 | if (compare_tree_int (op1, | |
11283 | TYPE_PRECISION (TREE_TYPE (type0))) | |
11284 | >= 0) | |
11285 | { | |
11286 | int_const = false; | |
11287 | if (c_inhibit_evaluation_warnings == 0) | |
11288 | warning_at (location, OPT_Wshift_count_overflow, | |
11289 | "right shift count >= width of vector element"); | |
11290 | } | |
11291 | } | |
3e4093b6 | 11292 | else |
bbb818c6 | 11293 | { |
3f75a254 | 11294 | if (!integer_zerop (op1)) |
3e4093b6 RS |
11295 | short_shift = 1; |
11296 | ||
11297 | if (compare_tree_int (op1, TYPE_PRECISION (type0)) >= 0) | |
928c19bb JM |
11298 | { |
11299 | int_const = false; | |
7d882b83 | 11300 | if (c_inhibit_evaluation_warnings == 0) |
13c21655 PC |
11301 | warning_at (location, OPT_Wshift_count_overflow, |
11302 | "right shift count >= width of type"); | |
928c19bb | 11303 | } |
bbb818c6 | 11304 | } |
b62acd60 | 11305 | } |
de520661 | 11306 | |
3e4093b6 RS |
11307 | /* Use the type of the value to be shifted. */ |
11308 | result_type = type0; | |
3e4093b6 RS |
11309 | /* Avoid converting op1 to result_type later. */ |
11310 | converted = 1; | |
400fbf9f | 11311 | } |
3e4093b6 | 11312 | break; |
253b6b82 | 11313 | |
3e4093b6 | 11314 | case LSHIFT_EXPR: |
76e2c821 JB |
11315 | if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE |
11316 | && TREE_CODE (TREE_TYPE (type0)) == INTEGER_TYPE | |
11317 | && TREE_CODE (TREE_TYPE (type1)) == INTEGER_TYPE | |
11318 | && TYPE_VECTOR_SUBPARTS (type0) == TYPE_VECTOR_SUBPARTS (type1)) | |
f87bd04b AS |
11319 | { |
11320 | result_type = type0; | |
11321 | converted = 1; | |
11322 | } | |
76e2c821 JB |
11323 | else if ((code0 == INTEGER_TYPE || code0 == FIXED_POINT_TYPE |
11324 | || code0 == VECTOR_TYPE) | |
451b5e48 | 11325 | && code1 == INTEGER_TYPE) |
3e4093b6 | 11326 | { |
de5a5fa1 | 11327 | doing_shift = true; |
0173bd2a MP |
11328 | if (TREE_CODE (op0) == INTEGER_CST |
11329 | && tree_int_cst_sgn (op0) < 0) | |
11330 | { | |
11331 | /* Don't reject a left shift of a negative value in a context | |
11332 | where a constant expression is needed in C90. */ | |
11333 | if (flag_isoc99) | |
11334 | int_const = false; | |
11335 | if (c_inhibit_evaluation_warnings == 0) | |
11336 | warning_at (location, OPT_Wshift_negative_value, | |
11337 | "left shift of negative value"); | |
11338 | } | |
928c19bb | 11339 | if (TREE_CODE (op1) == INTEGER_CST) |
de520661 | 11340 | { |
3e4093b6 | 11341 | if (tree_int_cst_sgn (op1) < 0) |
928c19bb JM |
11342 | { |
11343 | int_const = false; | |
7d882b83 | 11344 | if (c_inhibit_evaluation_warnings == 0) |
13c21655 PC |
11345 | warning_at (location, OPT_Wshift_count_negative, |
11346 | "left shift count is negative"); | |
928c19bb | 11347 | } |
76e2c821 JB |
11348 | else if (code0 == VECTOR_TYPE) |
11349 | { | |
11350 | if (compare_tree_int (op1, | |
11351 | TYPE_PRECISION (TREE_TYPE (type0))) | |
11352 | >= 0) | |
11353 | { | |
11354 | int_const = false; | |
11355 | if (c_inhibit_evaluation_warnings == 0) | |
11356 | warning_at (location, OPT_Wshift_count_overflow, | |
11357 | "left shift count >= width of vector element"); | |
11358 | } | |
11359 | } | |
3e4093b6 | 11360 | else if (compare_tree_int (op1, TYPE_PRECISION (type0)) >= 0) |
928c19bb JM |
11361 | { |
11362 | int_const = false; | |
7d882b83 | 11363 | if (c_inhibit_evaluation_warnings == 0) |
13c21655 PC |
11364 | warning_at (location, OPT_Wshift_count_overflow, |
11365 | "left shift count >= width of type"); | |
928c19bb | 11366 | } |
451b5e48 MP |
11367 | else if (TREE_CODE (op0) == INTEGER_CST |
11368 | && maybe_warn_shift_overflow (location, op0, op1) | |
11369 | && flag_isoc99) | |
11370 | int_const = false; | |
94ba5069 | 11371 | } |
de520661 | 11372 | |
3e4093b6 RS |
11373 | /* Use the type of the value to be shifted. */ |
11374 | result_type = type0; | |
3e4093b6 RS |
11375 | /* Avoid converting op1 to result_type later. */ |
11376 | converted = 1; | |
400fbf9f | 11377 | } |
3e4093b6 | 11378 | break; |
de520661 | 11379 | |
3e4093b6 RS |
11380 | case EQ_EXPR: |
11381 | case NE_EXPR: | |
d246ab4f AS |
11382 | if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE) |
11383 | { | |
11384 | tree intt; | |
0af94e6f | 11385 | if (!vector_types_compatible_elements_p (type0, type1)) |
d246ab4f AS |
11386 | { |
11387 | error_at (location, "comparing vectors with different " | |
11388 | "element types"); | |
11389 | return error_mark_node; | |
11390 | } | |
11391 | ||
11392 | if (TYPE_VECTOR_SUBPARTS (type0) != TYPE_VECTOR_SUBPARTS (type1)) | |
11393 | { | |
11394 | error_at (location, "comparing vectors with different " | |
11395 | "number of elements"); | |
11396 | return error_mark_node; | |
11397 | } | |
11398 | ||
fa74a4bc MP |
11399 | /* It's not precisely specified how the usual arithmetic |
11400 | conversions apply to the vector types. Here, we use | |
11401 | the unsigned type if one of the operands is signed and | |
11402 | the other one is unsigned. */ | |
11403 | if (TYPE_UNSIGNED (type0) != TYPE_UNSIGNED (type1)) | |
11404 | { | |
11405 | if (!TYPE_UNSIGNED (type0)) | |
11406 | op0 = build1 (VIEW_CONVERT_EXPR, type1, op0); | |
11407 | else | |
11408 | op1 = build1 (VIEW_CONVERT_EXPR, type0, op1); | |
11409 | warning_at (location, OPT_Wsign_compare, "comparison between " | |
11410 | "types %qT and %qT", type0, type1); | |
11411 | } | |
11412 | ||
d246ab4f AS |
11413 | /* Always construct signed integer vector type. */ |
11414 | intt = c_common_type_for_size (GET_MODE_BITSIZE | |
b397965c RS |
11415 | (SCALAR_TYPE_MODE |
11416 | (TREE_TYPE (type0))), 0); | |
d246ab4f AS |
11417 | result_type = build_opaque_vector_type (intt, |
11418 | TYPE_VECTOR_SUBPARTS (type0)); | |
11419 | converted = 1; | |
9f47c7e5 IE |
11420 | ret = build_vec_cmp (resultcode, result_type, op0, op1); |
11421 | goto return_build_binary_op; | |
d246ab4f | 11422 | } |
ae311566 | 11423 | if (FLOAT_TYPE_P (type0) || FLOAT_TYPE_P (type1)) |
ba47d38d AH |
11424 | warning_at (location, |
11425 | OPT_Wfloat_equal, | |
11426 | "comparing floating point with == or != is unsafe"); | |
3e4093b6 RS |
11427 | /* Result of comparison is always int, |
11428 | but don't convert the args to int! */ | |
11429 | build_type = integer_type_node; | |
11430 | if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE | |
ab22c1fa | 11431 | || code0 == FIXED_POINT_TYPE || code0 == COMPLEX_TYPE) |
3e4093b6 | 11432 | && (code1 == INTEGER_TYPE || code1 == REAL_TYPE |
ab22c1fa | 11433 | || code1 == FIXED_POINT_TYPE || code1 == COMPLEX_TYPE)) |
3e4093b6 | 11434 | short_compare = 1; |
637f1455 SZ |
11435 | else if (code0 == POINTER_TYPE && null_pointer_constant_p (orig_op1)) |
11436 | { | |
11437 | if (TREE_CODE (op0) == ADDR_EXPR | |
de55efd5 MP |
11438 | && decl_with_nonnull_addr_p (TREE_OPERAND (op0, 0)) |
11439 | && !from_macro_expansion_at (location)) | |
637f1455 SZ |
11440 | { |
11441 | if (code == EQ_EXPR) | |
11442 | warning_at (location, | |
11443 | OPT_Waddress, | |
11444 | "the comparison will always evaluate as %<false%> " | |
11445 | "for the address of %qD will never be NULL", | |
11446 | TREE_OPERAND (op0, 0)); | |
11447 | else | |
11448 | warning_at (location, | |
11449 | OPT_Waddress, | |
11450 | "the comparison will always evaluate as %<true%> " | |
11451 | "for the address of %qD will never be NULL", | |
11452 | TREE_OPERAND (op0, 0)); | |
11453 | } | |
11454 | result_type = type0; | |
11455 | } | |
11456 | else if (code1 == POINTER_TYPE && null_pointer_constant_p (orig_op0)) | |
11457 | { | |
11458 | if (TREE_CODE (op1) == ADDR_EXPR | |
de55efd5 MP |
11459 | && decl_with_nonnull_addr_p (TREE_OPERAND (op1, 0)) |
11460 | && !from_macro_expansion_at (location)) | |
637f1455 SZ |
11461 | { |
11462 | if (code == EQ_EXPR) | |
11463 | warning_at (location, | |
f90e8e2e | 11464 | OPT_Waddress, |
637f1455 SZ |
11465 | "the comparison will always evaluate as %<false%> " |
11466 | "for the address of %qD will never be NULL", | |
11467 | TREE_OPERAND (op1, 0)); | |
11468 | else | |
11469 | warning_at (location, | |
11470 | OPT_Waddress, | |
11471 | "the comparison will always evaluate as %<true%> " | |
11472 | "for the address of %qD will never be NULL", | |
11473 | TREE_OPERAND (op1, 0)); | |
11474 | } | |
11475 | result_type = type1; | |
11476 | } | |
3e4093b6 RS |
11477 | else if (code0 == POINTER_TYPE && code1 == POINTER_TYPE) |
11478 | { | |
11479 | tree tt0 = TREE_TYPE (type0); | |
11480 | tree tt1 = TREE_TYPE (type1); | |
36c5e70a BE |
11481 | addr_space_t as0 = TYPE_ADDR_SPACE (tt0); |
11482 | addr_space_t as1 = TYPE_ADDR_SPACE (tt1); | |
11483 | addr_space_t as_common = ADDR_SPACE_GENERIC; | |
11484 | ||
3e4093b6 RS |
11485 | /* Anything compares with void *. void * compares with anything. |
11486 | Otherwise, the targets must be compatible | |
11487 | and both must be object or both incomplete. */ | |
744aa42f | 11488 | if (comp_target_types (location, type0, type1)) |
10bc1b1b | 11489 | result_type = common_pointer_type (type0, type1); |
36c5e70a BE |
11490 | else if (!addr_space_superset (as0, as1, &as_common)) |
11491 | { | |
11492 | error_at (location, "comparison of pointers to " | |
11493 | "disjoint address spaces"); | |
11494 | return error_mark_node; | |
11495 | } | |
267bac10 | 11496 | else if (VOID_TYPE_P (tt0) && !TYPE_ATOMIC (tt0)) |
ee2990e7 | 11497 | { |
36c5e70a | 11498 | if (pedantic && TREE_CODE (tt1) == FUNCTION_TYPE) |
c1771a20 | 11499 | pedwarn (location, OPT_Wpedantic, "ISO C forbids " |
fcf73884 | 11500 | "comparison of %<void *%> with function pointer"); |
ee2990e7 | 11501 | } |
267bac10 | 11502 | else if (VOID_TYPE_P (tt1) && !TYPE_ATOMIC (tt1)) |
e6834654 | 11503 | { |
36c5e70a | 11504 | if (pedantic && TREE_CODE (tt0) == FUNCTION_TYPE) |
c1771a20 | 11505 | pedwarn (location, OPT_Wpedantic, "ISO C forbids " |
fcf73884 | 11506 | "comparison of %<void *%> with function pointer"); |
e6834654 | 11507 | } |
3e4093b6 | 11508 | else |
58393038 ZL |
11509 | /* Avoid warning about the volatile ObjC EH puts on decls. */ |
11510 | if (!objc_ok) | |
ba47d38d | 11511 | pedwarn (location, 0, |
509c9d60 | 11512 | "comparison of distinct pointer types lacks a cast"); |
e6834654 | 11513 | |
3e4093b6 | 11514 | if (result_type == NULL_TREE) |
36c5e70a BE |
11515 | { |
11516 | int qual = ENCODE_QUAL_ADDR_SPACE (as_common); | |
11517 | result_type = build_pointer_type | |
11518 | (build_qualified_type (void_type_node, qual)); | |
11519 | } | |
e6834654 | 11520 | } |
3e4093b6 | 11521 | else if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE) |
de520661 | 11522 | { |
3e4093b6 | 11523 | result_type = type0; |
ba47d38d | 11524 | pedwarn (location, 0, "comparison between pointer and integer"); |
de520661 | 11525 | } |
3e4093b6 | 11526 | else if (code0 == INTEGER_TYPE && code1 == POINTER_TYPE) |
8b6a5902 | 11527 | { |
3e4093b6 | 11528 | result_type = type1; |
ba47d38d | 11529 | pedwarn (location, 0, "comparison between pointer and integer"); |
8b6a5902 | 11530 | } |
04159acf MP |
11531 | if ((TREE_CODE (TREE_TYPE (orig_op0)) == BOOLEAN_TYPE |
11532 | || truth_value_p (TREE_CODE (orig_op0))) | |
11533 | ^ (TREE_CODE (TREE_TYPE (orig_op1)) == BOOLEAN_TYPE | |
11534 | || truth_value_p (TREE_CODE (orig_op1)))) | |
11535 | maybe_warn_bool_compare (location, code, orig_op0, orig_op1); | |
3e4093b6 | 11536 | break; |
8b6a5902 | 11537 | |
3e4093b6 RS |
11538 | case LE_EXPR: |
11539 | case GE_EXPR: | |
11540 | case LT_EXPR: | |
11541 | case GT_EXPR: | |
d246ab4f AS |
11542 | if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE) |
11543 | { | |
11544 | tree intt; | |
0af94e6f | 11545 | if (!vector_types_compatible_elements_p (type0, type1)) |
d246ab4f AS |
11546 | { |
11547 | error_at (location, "comparing vectors with different " | |
11548 | "element types"); | |
11549 | return error_mark_node; | |
11550 | } | |
11551 | ||
11552 | if (TYPE_VECTOR_SUBPARTS (type0) != TYPE_VECTOR_SUBPARTS (type1)) | |
11553 | { | |
11554 | error_at (location, "comparing vectors with different " | |
11555 | "number of elements"); | |
11556 | return error_mark_node; | |
11557 | } | |
11558 | ||
fa74a4bc MP |
11559 | /* It's not precisely specified how the usual arithmetic |
11560 | conversions apply to the vector types. Here, we use | |
11561 | the unsigned type if one of the operands is signed and | |
11562 | the other one is unsigned. */ | |
11563 | if (TYPE_UNSIGNED (type0) != TYPE_UNSIGNED (type1)) | |
11564 | { | |
11565 | if (!TYPE_UNSIGNED (type0)) | |
11566 | op0 = build1 (VIEW_CONVERT_EXPR, type1, op0); | |
11567 | else | |
11568 | op1 = build1 (VIEW_CONVERT_EXPR, type0, op1); | |
11569 | warning_at (location, OPT_Wsign_compare, "comparison between " | |
11570 | "types %qT and %qT", type0, type1); | |
11571 | } | |
11572 | ||
d246ab4f AS |
11573 | /* Always construct signed integer vector type. */ |
11574 | intt = c_common_type_for_size (GET_MODE_BITSIZE | |
b397965c RS |
11575 | (SCALAR_TYPE_MODE |
11576 | (TREE_TYPE (type0))), 0); | |
d246ab4f AS |
11577 | result_type = build_opaque_vector_type (intt, |
11578 | TYPE_VECTOR_SUBPARTS (type0)); | |
11579 | converted = 1; | |
9f47c7e5 IE |
11580 | ret = build_vec_cmp (resultcode, result_type, op0, op1); |
11581 | goto return_build_binary_op; | |
d246ab4f | 11582 | } |
3e4093b6 | 11583 | build_type = integer_type_node; |
ab22c1fa CF |
11584 | if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE |
11585 | || code0 == FIXED_POINT_TYPE) | |
11586 | && (code1 == INTEGER_TYPE || code1 == REAL_TYPE | |
11587 | || code1 == FIXED_POINT_TYPE)) | |
3e4093b6 RS |
11588 | short_compare = 1; |
11589 | else if (code0 == POINTER_TYPE && code1 == POINTER_TYPE) | |
11590 | { | |
36c5e70a BE |
11591 | addr_space_t as0 = TYPE_ADDR_SPACE (TREE_TYPE (type0)); |
11592 | addr_space_t as1 = TYPE_ADDR_SPACE (TREE_TYPE (type1)); | |
11593 | addr_space_t as_common; | |
11594 | ||
744aa42f | 11595 | if (comp_target_types (location, type0, type1)) |
3e4093b6 | 11596 | { |
10bc1b1b | 11597 | result_type = common_pointer_type (type0, type1); |
3e4093b6 RS |
11598 | if (!COMPLETE_TYPE_P (TREE_TYPE (type0)) |
11599 | != !COMPLETE_TYPE_P (TREE_TYPE (type1))) | |
ba47d38d | 11600 | pedwarn (location, 0, |
509c9d60 | 11601 | "comparison of complete and incomplete pointers"); |
fcf73884 | 11602 | else if (TREE_CODE (TREE_TYPE (type0)) == FUNCTION_TYPE) |
c1771a20 | 11603 | pedwarn (location, OPT_Wpedantic, "ISO C forbids " |
fcf73884 | 11604 | "ordered comparisons of pointers to functions"); |
d42ba3b8 SZ |
11605 | else if (null_pointer_constant_p (orig_op0) |
11606 | || null_pointer_constant_p (orig_op1)) | |
11607 | warning_at (location, OPT_Wextra, | |
11608 | "ordered comparison of pointer with null pointer"); | |
11609 | ||
3e4093b6 | 11610 | } |
36c5e70a BE |
11611 | else if (!addr_space_superset (as0, as1, &as_common)) |
11612 | { | |
11613 | error_at (location, "comparison of pointers to " | |
11614 | "disjoint address spaces"); | |
11615 | return error_mark_node; | |
11616 | } | |
3e4093b6 RS |
11617 | else |
11618 | { | |
36c5e70a BE |
11619 | int qual = ENCODE_QUAL_ADDR_SPACE (as_common); |
11620 | result_type = build_pointer_type | |
11621 | (build_qualified_type (void_type_node, qual)); | |
ba47d38d | 11622 | pedwarn (location, 0, |
509c9d60 | 11623 | "comparison of distinct pointer types lacks a cast"); |
3e4093b6 RS |
11624 | } |
11625 | } | |
6aa3c60d | 11626 | else if (code0 == POINTER_TYPE && null_pointer_constant_p (orig_op1)) |
3e4093b6 RS |
11627 | { |
11628 | result_type = type0; | |
fcf73884 | 11629 | if (pedantic) |
c1771a20 | 11630 | pedwarn (location, OPT_Wpedantic, |
fcf73884 MLI |
11631 | "ordered comparison of pointer with integer zero"); |
11632 | else if (extra_warnings) | |
ba47d38d | 11633 | warning_at (location, OPT_Wextra, |
d42ba3b8 | 11634 | "ordered comparison of pointer with integer zero"); |
3e4093b6 | 11635 | } |
6aa3c60d | 11636 | else if (code1 == POINTER_TYPE && null_pointer_constant_p (orig_op0)) |
3e4093b6 RS |
11637 | { |
11638 | result_type = type1; | |
d42ba3b8 | 11639 | if (pedantic) |
c1771a20 | 11640 | pedwarn (location, OPT_Wpedantic, |
d42ba3b8 SZ |
11641 | "ordered comparison of pointer with integer zero"); |
11642 | else if (extra_warnings) | |
11643 | warning_at (location, OPT_Wextra, | |
11644 | "ordered comparison of pointer with integer zero"); | |
3e4093b6 RS |
11645 | } |
11646 | else if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE) | |
11647 | { | |
11648 | result_type = type0; | |
ba47d38d | 11649 | pedwarn (location, 0, "comparison between pointer and integer"); |
3e4093b6 RS |
11650 | } |
11651 | else if (code0 == INTEGER_TYPE && code1 == POINTER_TYPE) | |
11652 | { | |
11653 | result_type = type1; | |
ba47d38d | 11654 | pedwarn (location, 0, "comparison between pointer and integer"); |
3e4093b6 | 11655 | } |
04159acf MP |
11656 | if ((TREE_CODE (TREE_TYPE (orig_op0)) == BOOLEAN_TYPE |
11657 | || truth_value_p (TREE_CODE (orig_op0))) | |
11658 | ^ (TREE_CODE (TREE_TYPE (orig_op1)) == BOOLEAN_TYPE | |
11659 | || truth_value_p (TREE_CODE (orig_op1)))) | |
11660 | maybe_warn_bool_compare (location, code, orig_op0, orig_op1); | |
3e4093b6 | 11661 | break; |
64094f6a | 11662 | |
3e4093b6 | 11663 | default: |
37b2f290 | 11664 | gcc_unreachable (); |
c9fe6f9f | 11665 | } |
8f17b5c5 | 11666 | |
e57e265b PB |
11667 | if (code0 == ERROR_MARK || code1 == ERROR_MARK) |
11668 | return error_mark_node; | |
11669 | ||
5bed876a AH |
11670 | if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE |
11671 | && (!tree_int_cst_equal (TYPE_SIZE (type0), TYPE_SIZE (type1)) | |
0af94e6f | 11672 | || !vector_types_compatible_elements_p (type0, type1))) |
5bed876a | 11673 | { |
745e411d DM |
11674 | gcc_rich_location richloc (location); |
11675 | richloc.maybe_add_expr (orig_op0); | |
11676 | richloc.maybe_add_expr (orig_op1); | |
11677 | binary_op_error (&richloc, code, type0, type1); | |
5bed876a AH |
11678 | return error_mark_node; |
11679 | } | |
11680 | ||
3e4093b6 | 11681 | if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE || code0 == COMPLEX_TYPE |
ab22c1fa | 11682 | || code0 == FIXED_POINT_TYPE || code0 == VECTOR_TYPE) |
3e4093b6 RS |
11683 | && |
11684 | (code1 == INTEGER_TYPE || code1 == REAL_TYPE || code1 == COMPLEX_TYPE | |
ab22c1fa | 11685 | || code1 == FIXED_POINT_TYPE || code1 == VECTOR_TYPE)) |
400fbf9f | 11686 | { |
2ca862e9 JM |
11687 | bool first_complex = (code0 == COMPLEX_TYPE); |
11688 | bool second_complex = (code1 == COMPLEX_TYPE); | |
11689 | int none_complex = (!first_complex && !second_complex); | |
39b726dd | 11690 | |
3e4093b6 | 11691 | if (shorten || common || short_compare) |
3bf6bfcc JJ |
11692 | { |
11693 | result_type = c_common_type (type0, type1); | |
0a0b3574 MM |
11694 | do_warn_double_promotion (result_type, type0, type1, |
11695 | "implicit conversion from %qT to %qT " | |
11696 | "to match other operand of binary " | |
11697 | "expression", | |
11698 | location); | |
3bf6bfcc JJ |
11699 | if (result_type == error_mark_node) |
11700 | return error_mark_node; | |
11701 | } | |
400fbf9f | 11702 | |
2ca862e9 JM |
11703 | if (first_complex != second_complex |
11704 | && (code == PLUS_EXPR | |
11705 | || code == MINUS_EXPR | |
11706 | || code == MULT_EXPR | |
11707 | || (code == TRUNC_DIV_EXPR && first_complex)) | |
11708 | && TREE_CODE (TREE_TYPE (result_type)) == REAL_TYPE | |
11709 | && flag_signed_zeros) | |
11710 | { | |
11711 | /* An operation on mixed real/complex operands must be | |
11712 | handled specially, but the language-independent code can | |
11713 | more easily optimize the plain complex arithmetic if | |
11714 | -fno-signed-zeros. */ | |
11715 | tree real_type = TREE_TYPE (result_type); | |
11716 | tree real, imag; | |
11717 | if (type0 != orig_type0 || type1 != orig_type1) | |
11718 | { | |
11719 | gcc_assert (may_need_excess_precision && common); | |
2d2e923f | 11720 | semantic_result_type = c_common_type (orig_type0, orig_type1); |
2ca862e9 JM |
11721 | } |
11722 | if (first_complex) | |
11723 | { | |
11724 | if (TREE_TYPE (op0) != result_type) | |
68fca595 | 11725 | op0 = convert_and_check (location, result_type, op0); |
2ca862e9 | 11726 | if (TREE_TYPE (op1) != real_type) |
68fca595 | 11727 | op1 = convert_and_check (location, real_type, op1); |
2ca862e9 JM |
11728 | } |
11729 | else | |
11730 | { | |
11731 | if (TREE_TYPE (op0) != real_type) | |
68fca595 | 11732 | op0 = convert_and_check (location, real_type, op0); |
2ca862e9 | 11733 | if (TREE_TYPE (op1) != result_type) |
68fca595 | 11734 | op1 = convert_and_check (location, result_type, op1); |
2ca862e9 JM |
11735 | } |
11736 | if (TREE_CODE (op0) == ERROR_MARK || TREE_CODE (op1) == ERROR_MARK) | |
11737 | return error_mark_node; | |
11738 | if (first_complex) | |
11739 | { | |
b2fa0a8b | 11740 | op0 = save_expr (op0); |
2ca862e9 | 11741 | real = build_unary_op (EXPR_LOCATION (orig_op0), REALPART_EXPR, |
e51fbec3 | 11742 | op0, true); |
2ca862e9 | 11743 | imag = build_unary_op (EXPR_LOCATION (orig_op0), IMAGPART_EXPR, |
e51fbec3 | 11744 | op0, true); |
2ca862e9 JM |
11745 | switch (code) |
11746 | { | |
11747 | case MULT_EXPR: | |
11748 | case TRUNC_DIV_EXPR: | |
b2fa0a8b | 11749 | op1 = save_expr (op1); |
2ca862e9 JM |
11750 | imag = build2 (resultcode, real_type, imag, op1); |
11751 | /* Fall through. */ | |
11752 | case PLUS_EXPR: | |
11753 | case MINUS_EXPR: | |
11754 | real = build2 (resultcode, real_type, real, op1); | |
11755 | break; | |
11756 | default: | |
11757 | gcc_unreachable(); | |
11758 | } | |
11759 | } | |
11760 | else | |
11761 | { | |
b2fa0a8b | 11762 | op1 = save_expr (op1); |
2ca862e9 | 11763 | real = build_unary_op (EXPR_LOCATION (orig_op1), REALPART_EXPR, |
e51fbec3 | 11764 | op1, true); |
2ca862e9 | 11765 | imag = build_unary_op (EXPR_LOCATION (orig_op1), IMAGPART_EXPR, |
e51fbec3 | 11766 | op1, true); |
2ca862e9 JM |
11767 | switch (code) |
11768 | { | |
11769 | case MULT_EXPR: | |
b2fa0a8b | 11770 | op0 = save_expr (op0); |
2ca862e9 JM |
11771 | imag = build2 (resultcode, real_type, op0, imag); |
11772 | /* Fall through. */ | |
11773 | case PLUS_EXPR: | |
11774 | real = build2 (resultcode, real_type, op0, real); | |
11775 | break; | |
11776 | case MINUS_EXPR: | |
11777 | real = build2 (resultcode, real_type, op0, real); | |
11778 | imag = build1 (NEGATE_EXPR, real_type, imag); | |
11779 | break; | |
11780 | default: | |
11781 | gcc_unreachable(); | |
11782 | } | |
11783 | } | |
11784 | ret = build2 (COMPLEX_EXPR, result_type, real, imag); | |
11785 | goto return_build_binary_op; | |
11786 | } | |
11787 | ||
3e4093b6 RS |
11788 | /* For certain operations (which identify themselves by shorten != 0) |
11789 | if both args were extended from the same smaller type, | |
11790 | do the arithmetic in that type and then extend. | |
400fbf9f | 11791 | |
3e4093b6 RS |
11792 | shorten !=0 and !=1 indicates a bitwise operation. |
11793 | For them, this optimization is safe only if | |
11794 | both args are zero-extended or both are sign-extended. | |
11795 | Otherwise, we might change the result. | |
11796 | Eg, (short)-1 | (unsigned short)-1 is (int)-1 | |
11797 | but calculated in (unsigned short) it would be (unsigned short)-1. */ | |
400fbf9f | 11798 | |
3e4093b6 RS |
11799 | if (shorten && none_complex) |
11800 | { | |
3e4093b6 | 11801 | final_type = result_type; |
b8698a0f | 11802 | result_type = shorten_binary_op (result_type, op0, op1, |
6715192c | 11803 | shorten == -1); |
3e4093b6 | 11804 | } |
88a3dbc1 | 11805 | |
3e4093b6 | 11806 | /* Shifts can be shortened if shifting right. */ |
2f6e4e97 | 11807 | |
3e4093b6 RS |
11808 | if (short_shift) |
11809 | { | |
11810 | int unsigned_arg; | |
11811 | tree arg0 = get_narrower (op0, &unsigned_arg); | |
88a3dbc1 | 11812 | |
3e4093b6 | 11813 | final_type = result_type; |
abe80e6d | 11814 | |
3e4093b6 | 11815 | if (arg0 == op0 && final_type == TREE_TYPE (op0)) |
8df83eae | 11816 | unsigned_arg = TYPE_UNSIGNED (TREE_TYPE (op0)); |
e9a25f70 | 11817 | |
3e4093b6 | 11818 | if (TYPE_PRECISION (TREE_TYPE (arg0)) < TYPE_PRECISION (result_type) |
be123439 | 11819 | && tree_int_cst_sgn (op1) > 0 |
3e4093b6 RS |
11820 | /* We can shorten only if the shift count is less than the |
11821 | number of bits in the smaller type size. */ | |
11822 | && compare_tree_int (op1, TYPE_PRECISION (TREE_TYPE (arg0))) < 0 | |
11823 | /* We cannot drop an unsigned shift after sign-extension. */ | |
8df83eae | 11824 | && (!TYPE_UNSIGNED (final_type) || unsigned_arg)) |
3e4093b6 RS |
11825 | { |
11826 | /* Do an unsigned shift if the operand was zero-extended. */ | |
11827 | result_type | |
11828 | = c_common_signed_or_unsigned_type (unsigned_arg, | |
11829 | TREE_TYPE (arg0)); | |
11830 | /* Convert value-to-be-shifted to that type. */ | |
11831 | if (TREE_TYPE (op0) != result_type) | |
11832 | op0 = convert (result_type, op0); | |
11833 | converted = 1; | |
abe80e6d | 11834 | } |
88a3dbc1 RK |
11835 | } |
11836 | ||
3e4093b6 RS |
11837 | /* Comparison operations are shortened too but differently. |
11838 | They identify themselves by setting short_compare = 1. */ | |
56cb9733 | 11839 | |
3e4093b6 RS |
11840 | if (short_compare) |
11841 | { | |
11842 | /* Don't write &op0, etc., because that would prevent op0 | |
11843 | from being kept in a register. | |
11844 | Instead, make copies of the our local variables and | |
11845 | pass the copies by reference, then copy them back afterward. */ | |
11846 | tree xop0 = op0, xop1 = op1, xresult_type = result_type; | |
11847 | enum tree_code xresultcode = resultcode; | |
11848 | tree val | |
393e8e8b MP |
11849 | = shorten_compare (location, &xop0, &xop1, &xresult_type, |
11850 | &xresultcode); | |
8f17b5c5 | 11851 | |
3fa8871b | 11852 | if (val != NULL_TREE) |
c9f9eb5d AH |
11853 | { |
11854 | ret = val; | |
11855 | goto return_build_binary_op; | |
11856 | } | |
8f17b5c5 | 11857 | |
3e4093b6 RS |
11858 | op0 = xop0, op1 = xop1; |
11859 | converted = 1; | |
11860 | resultcode = xresultcode; | |
8f17b5c5 | 11861 | |
7d882b83 | 11862 | if (c_inhibit_evaluation_warnings == 0) |
928c19bb JM |
11863 | { |
11864 | bool op0_maybe_const = true; | |
11865 | bool op1_maybe_const = true; | |
11866 | tree orig_op0_folded, orig_op1_folded; | |
11867 | ||
11868 | if (in_late_binary_op) | |
11869 | { | |
11870 | orig_op0_folded = orig_op0; | |
11871 | orig_op1_folded = orig_op1; | |
11872 | } | |
11873 | else | |
11874 | { | |
11875 | /* Fold for the sake of possible warnings, as in | |
11876 | build_conditional_expr. This requires the | |
11877 | "original" values to be folded, not just op0 and | |
11878 | op1. */ | |
f5178456 | 11879 | c_inhibit_evaluation_warnings++; |
928c19bb JM |
11880 | op0 = c_fully_fold (op0, require_constant_value, |
11881 | &op0_maybe_const); | |
11882 | op1 = c_fully_fold (op1, require_constant_value, | |
11883 | &op1_maybe_const); | |
f5178456 | 11884 | c_inhibit_evaluation_warnings--; |
928c19bb JM |
11885 | orig_op0_folded = c_fully_fold (orig_op0, |
11886 | require_constant_value, | |
11887 | NULL); | |
11888 | orig_op1_folded = c_fully_fold (orig_op1, | |
11889 | require_constant_value, | |
11890 | NULL); | |
11891 | } | |
11892 | ||
11893 | if (warn_sign_compare) | |
11894 | warn_for_sign_compare (location, orig_op0_folded, | |
11895 | orig_op1_folded, op0, op1, | |
11896 | result_type, resultcode); | |
5c2f94b4 | 11897 | if (!in_late_binary_op && !int_operands) |
928c19bb JM |
11898 | { |
11899 | if (!op0_maybe_const || TREE_CODE (op0) != INTEGER_CST) | |
e5a94231 | 11900 | op0 = c_wrap_maybe_const (op0, !op0_maybe_const); |
928c19bb | 11901 | if (!op1_maybe_const || TREE_CODE (op1) != INTEGER_CST) |
e5a94231 | 11902 | op1 = c_wrap_maybe_const (op1, !op1_maybe_const); |
928c19bb | 11903 | } |
3e4093b6 | 11904 | } |
2ad1815d | 11905 | } |
64094f6a | 11906 | } |
64094f6a | 11907 | |
3e4093b6 RS |
11908 | /* At this point, RESULT_TYPE must be nonzero to avoid an error message. |
11909 | If CONVERTED is zero, both args will be converted to type RESULT_TYPE. | |
11910 | Then the expression will be built. | |
11911 | It will be given type FINAL_TYPE if that is nonzero; | |
11912 | otherwise, it will be given type RESULT_TYPE. */ | |
400fbf9f | 11913 | |
3e4093b6 RS |
11914 | if (!result_type) |
11915 | { | |
745e411d DM |
11916 | gcc_rich_location richloc (location); |
11917 | richloc.maybe_add_expr (orig_op0); | |
11918 | richloc.maybe_add_expr (orig_op1); | |
11919 | binary_op_error (&richloc, code, TREE_TYPE (op0), TREE_TYPE (op1)); | |
3e4093b6 RS |
11920 | return error_mark_node; |
11921 | } | |
400fbf9f | 11922 | |
3e4093b6 | 11923 | if (build_type == NULL_TREE) |
8ce94e44 JM |
11924 | { |
11925 | build_type = result_type; | |
180f8dbb JM |
11926 | if ((type0 != orig_type0 || type1 != orig_type1) |
11927 | && !boolean_op) | |
8ce94e44 JM |
11928 | { |
11929 | gcc_assert (may_need_excess_precision && common); | |
2d2e923f | 11930 | semantic_result_type = c_common_type (orig_type0, orig_type1); |
8ce94e44 JM |
11931 | } |
11932 | } | |
400fbf9f | 11933 | |
2d2e923f MLI |
11934 | if (!converted) |
11935 | { | |
68fca595 MP |
11936 | op0 = ep_convert_and_check (location, result_type, op0, |
11937 | semantic_result_type); | |
11938 | op1 = ep_convert_and_check (location, result_type, op1, | |
11939 | semantic_result_type); | |
2d2e923f MLI |
11940 | |
11941 | /* This can happen if one operand has a vector type, and the other | |
11942 | has a different type. */ | |
11943 | if (TREE_CODE (op0) == ERROR_MARK || TREE_CODE (op1) == ERROR_MARK) | |
11944 | return error_mark_node; | |
11945 | } | |
11946 | ||
45b2222a ML |
11947 | if (sanitize_flags_p ((SANITIZE_SHIFT |
11948 | | SANITIZE_DIVIDE | SANITIZE_FLOAT_DIVIDE)) | |
f34ebeb2 | 11949 | && current_function_decl != NULL_TREE |
b2aaf235 MP |
11950 | && (doing_div_or_mod || doing_shift) |
11951 | && !require_constant_value) | |
de5a5fa1 MP |
11952 | { |
11953 | /* OP0 and/or OP1 might have side-effects. */ | |
b2fa0a8b MP |
11954 | op0 = save_expr (op0); |
11955 | op1 = save_expr (op1); | |
de5a5fa1 MP |
11956 | op0 = c_fully_fold (op0, false, NULL); |
11957 | op1 = c_fully_fold (op1, false, NULL); | |
45b2222a ML |
11958 | if (doing_div_or_mod && (sanitize_flags_p ((SANITIZE_DIVIDE |
11959 | | SANITIZE_FLOAT_DIVIDE)))) | |
de5a5fa1 | 11960 | instrument_expr = ubsan_instrument_division (location, op0, op1); |
45b2222a | 11961 | else if (doing_shift && sanitize_flags_p (SANITIZE_SHIFT)) |
de5a5fa1 MP |
11962 | instrument_expr = ubsan_instrument_shift (location, code, op0, op1); |
11963 | } | |
11964 | ||
c9f9eb5d | 11965 | /* Treat expressions in initializers specially as they can't trap. */ |
928c19bb JM |
11966 | if (int_const_or_overflow) |
11967 | ret = (require_constant_value | |
db3927fb AH |
11968 | ? fold_build2_initializer_loc (location, resultcode, build_type, |
11969 | op0, op1) | |
11970 | : fold_build2_loc (location, resultcode, build_type, op0, op1)); | |
928c19bb JM |
11971 | else |
11972 | ret = build2 (resultcode, build_type, op0, op1); | |
3fa8871b | 11973 | if (final_type != NULL_TREE) |
c9f9eb5d AH |
11974 | ret = convert (final_type, ret); |
11975 | ||
11976 | return_build_binary_op: | |
11977 | gcc_assert (ret != error_mark_node); | |
928c19bb JM |
11978 | if (TREE_CODE (ret) == INTEGER_CST && !TREE_OVERFLOW (ret) && !int_const) |
11979 | ret = (int_operands | |
11980 | ? note_integer_operands (ret) | |
11981 | : build1 (NOP_EXPR, TREE_TYPE (ret), ret)); | |
11982 | else if (TREE_CODE (ret) != INTEGER_CST && int_operands | |
11983 | && !in_late_binary_op) | |
11984 | ret = note_integer_operands (ret); | |
c9f9eb5d | 11985 | protected_set_expr_location (ret, location); |
de5a5fa1 | 11986 | |
a24d975c | 11987 | if (instrument_expr != NULL) |
de5a5fa1 MP |
11988 | ret = fold_build2 (COMPOUND_EXPR, TREE_TYPE (ret), |
11989 | instrument_expr, ret); | |
11990 | ||
4d1b8e70 JJ |
11991 | if (semantic_result_type) |
11992 | ret = build1_loc (location, EXCESS_PRECISION_EXPR, | |
11993 | semantic_result_type, ret); | |
11994 | ||
c9f9eb5d | 11995 | return ret; |
400fbf9f | 11996 | } |
85498824 JM |
11997 | |
11998 | ||
11999 | /* Convert EXPR to be a truth-value, validating its type for this | |
ba47d38d | 12000 | purpose. LOCATION is the source location for the expression. */ |
85498824 JM |
12001 | |
12002 | tree | |
ba47d38d | 12003 | c_objc_common_truthvalue_conversion (location_t location, tree expr) |
85498824 | 12004 | { |
928c19bb JM |
12005 | bool int_const, int_operands; |
12006 | ||
85498824 JM |
12007 | switch (TREE_CODE (TREE_TYPE (expr))) |
12008 | { | |
12009 | case ARRAY_TYPE: | |
ba47d38d | 12010 | error_at (location, "used array that cannot be converted to pointer where scalar is required"); |
85498824 JM |
12011 | return error_mark_node; |
12012 | ||
12013 | case RECORD_TYPE: | |
ba47d38d | 12014 | error_at (location, "used struct type value where scalar is required"); |
85498824 JM |
12015 | return error_mark_node; |
12016 | ||
12017 | case UNION_TYPE: | |
ba47d38d | 12018 | error_at (location, "used union type value where scalar is required"); |
85498824 JM |
12019 | return error_mark_node; |
12020 | ||
04af8788 NP |
12021 | case VOID_TYPE: |
12022 | error_at (location, "void value not ignored as it ought to be"); | |
12023 | return error_mark_node; | |
12024 | ||
1807ffc1 MS |
12025 | case POINTER_TYPE: |
12026 | if (reject_gcc_builtin (expr)) | |
12027 | return error_mark_node; | |
12028 | break; | |
12029 | ||
46bdb9cf JM |
12030 | case FUNCTION_TYPE: |
12031 | gcc_unreachable (); | |
12032 | ||
d246ab4f AS |
12033 | case VECTOR_TYPE: |
12034 | error_at (location, "used vector type where scalar is required"); | |
12035 | return error_mark_node; | |
12036 | ||
85498824 JM |
12037 | default: |
12038 | break; | |
12039 | } | |
12040 | ||
928c19bb JM |
12041 | int_const = (TREE_CODE (expr) == INTEGER_CST && !TREE_OVERFLOW (expr)); |
12042 | int_operands = EXPR_INT_CONST_OPERANDS (expr); | |
a27d595d JM |
12043 | if (int_operands && TREE_CODE (expr) != INTEGER_CST) |
12044 | { | |
12045 | expr = remove_c_maybe_const_expr (expr); | |
12046 | expr = build2 (NE_EXPR, integer_type_node, expr, | |
12047 | convert (TREE_TYPE (expr), integer_zero_node)); | |
12048 | expr = note_integer_operands (expr); | |
12049 | } | |
12050 | else | |
12051 | /* ??? Should we also give an error for vectors rather than leaving | |
12052 | those to give errors later? */ | |
12053 | expr = c_common_truthvalue_conversion (location, expr); | |
928c19bb JM |
12054 | |
12055 | if (TREE_CODE (expr) == INTEGER_CST && int_operands && !int_const) | |
12056 | { | |
12057 | if (TREE_OVERFLOW (expr)) | |
12058 | return expr; | |
12059 | else | |
12060 | return note_integer_operands (expr); | |
12061 | } | |
12062 | if (TREE_CODE (expr) == INTEGER_CST && !int_const) | |
12063 | return build1 (NOP_EXPR, TREE_TYPE (expr), expr); | |
12064 | return expr; | |
85498824 | 12065 | } |
73f397d4 JM |
12066 | \f |
12067 | ||
12068 | /* Convert EXPR to a contained DECL, updating *TC, *TI and *SE as | |
12069 | required. */ | |
12070 | ||
12071 | tree | |
51eed280 | 12072 | c_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se) |
73f397d4 JM |
12073 | { |
12074 | if (TREE_CODE (expr) == COMPOUND_LITERAL_EXPR) | |
12075 | { | |
12076 | tree decl = COMPOUND_LITERAL_EXPR_DECL (expr); | |
12077 | /* Executing a compound literal inside a function reinitializes | |
12078 | it. */ | |
12079 | if (!TREE_STATIC (decl)) | |
12080 | *se = true; | |
12081 | return decl; | |
12082 | } | |
12083 | else | |
12084 | return expr; | |
12085 | } | |
953ff289 | 12086 | \f |
88bae6f4 TS |
12087 | /* Generate OMP construct CODE, with BODY and CLAUSES as its compound |
12088 | statement. LOC is the location of the construct. */ | |
41dbbb37 TS |
12089 | |
12090 | tree | |
88bae6f4 TS |
12091 | c_finish_omp_construct (location_t loc, enum tree_code code, tree body, |
12092 | tree clauses) | |
41dbbb37 | 12093 | { |
88bae6f4 | 12094 | body = c_end_compound_stmt (loc, body, true); |
41dbbb37 | 12095 | |
88bae6f4 | 12096 | tree stmt = make_node (code); |
41dbbb37 | 12097 | TREE_TYPE (stmt) = void_type_node; |
88bae6f4 TS |
12098 | OMP_BODY (stmt) = body; |
12099 | OMP_CLAUSES (stmt) = clauses; | |
41dbbb37 TS |
12100 | SET_EXPR_LOCATION (stmt, loc); |
12101 | ||
12102 | return add_stmt (stmt); | |
12103 | } | |
12104 | ||
12105 | /* Generate OACC_DATA, with CLAUSES and BLOCK as its compound | |
12106 | statement. LOC is the location of the OACC_DATA. */ | |
12107 | ||
12108 | tree | |
12109 | c_finish_oacc_data (location_t loc, tree clauses, tree block) | |
12110 | { | |
12111 | tree stmt; | |
12112 | ||
12113 | block = c_end_compound_stmt (loc, block, true); | |
12114 | ||
12115 | stmt = make_node (OACC_DATA); | |
12116 | TREE_TYPE (stmt) = void_type_node; | |
12117 | OACC_DATA_CLAUSES (stmt) = clauses; | |
12118 | OACC_DATA_BODY (stmt) = block; | |
12119 | SET_EXPR_LOCATION (stmt, loc); | |
12120 | ||
12121 | return add_stmt (stmt); | |
12122 | } | |
12123 | ||
37d5ad46 JB |
12124 | /* Generate OACC_HOST_DATA, with CLAUSES and BLOCK as its compound |
12125 | statement. LOC is the location of the OACC_HOST_DATA. */ | |
12126 | ||
12127 | tree | |
12128 | c_finish_oacc_host_data (location_t loc, tree clauses, tree block) | |
12129 | { | |
12130 | tree stmt; | |
12131 | ||
12132 | block = c_end_compound_stmt (loc, block, true); | |
12133 | ||
12134 | stmt = make_node (OACC_HOST_DATA); | |
12135 | TREE_TYPE (stmt) = void_type_node; | |
12136 | OACC_HOST_DATA_CLAUSES (stmt) = clauses; | |
12137 | OACC_HOST_DATA_BODY (stmt) = block; | |
12138 | SET_EXPR_LOCATION (stmt, loc); | |
12139 | ||
12140 | return add_stmt (stmt); | |
12141 | } | |
12142 | ||
c0220ea4 | 12143 | /* Like c_begin_compound_stmt, except force the retention of the BLOCK. */ |
953ff289 DN |
12144 | |
12145 | tree | |
12146 | c_begin_omp_parallel (void) | |
12147 | { | |
12148 | tree block; | |
12149 | ||
12150 | keep_next_level (); | |
12151 | block = c_begin_compound_stmt (true); | |
12152 | ||
12153 | return block; | |
12154 | } | |
12155 | ||
c2255bc4 AH |
12156 | /* Generate OMP_PARALLEL, with CLAUSES and BLOCK as its compound |
12157 | statement. LOC is the location of the OMP_PARALLEL. */ | |
a68ab351 | 12158 | |
953ff289 | 12159 | tree |
c2255bc4 | 12160 | c_finish_omp_parallel (location_t loc, tree clauses, tree block) |
953ff289 DN |
12161 | { |
12162 | tree stmt; | |
12163 | ||
c2255bc4 | 12164 | block = c_end_compound_stmt (loc, block, true); |
953ff289 DN |
12165 | |
12166 | stmt = make_node (OMP_PARALLEL); | |
12167 | TREE_TYPE (stmt) = void_type_node; | |
12168 | OMP_PARALLEL_CLAUSES (stmt) = clauses; | |
12169 | OMP_PARALLEL_BODY (stmt) = block; | |
c2255bc4 | 12170 | SET_EXPR_LOCATION (stmt, loc); |
953ff289 DN |
12171 | |
12172 | return add_stmt (stmt); | |
12173 | } | |
12174 | ||
a68ab351 JJ |
12175 | /* Like c_begin_compound_stmt, except force the retention of the BLOCK. */ |
12176 | ||
12177 | tree | |
12178 | c_begin_omp_task (void) | |
12179 | { | |
12180 | tree block; | |
12181 | ||
12182 | keep_next_level (); | |
12183 | block = c_begin_compound_stmt (true); | |
12184 | ||
12185 | return block; | |
12186 | } | |
12187 | ||
c2255bc4 AH |
12188 | /* Generate OMP_TASK, with CLAUSES and BLOCK as its compound |
12189 | statement. LOC is the location of the #pragma. */ | |
a68ab351 JJ |
12190 | |
12191 | tree | |
c2255bc4 | 12192 | c_finish_omp_task (location_t loc, tree clauses, tree block) |
a68ab351 JJ |
12193 | { |
12194 | tree stmt; | |
12195 | ||
c2255bc4 | 12196 | block = c_end_compound_stmt (loc, block, true); |
a68ab351 JJ |
12197 | |
12198 | stmt = make_node (OMP_TASK); | |
12199 | TREE_TYPE (stmt) = void_type_node; | |
12200 | OMP_TASK_CLAUSES (stmt) = clauses; | |
12201 | OMP_TASK_BODY (stmt) = block; | |
c2255bc4 | 12202 | SET_EXPR_LOCATION (stmt, loc); |
a68ab351 JJ |
12203 | |
12204 | return add_stmt (stmt); | |
12205 | } | |
12206 | ||
acf0174b JJ |
12207 | /* Generate GOMP_cancel call for #pragma omp cancel. */ |
12208 | ||
12209 | void | |
12210 | c_finish_omp_cancel (location_t loc, tree clauses) | |
12211 | { | |
12212 | tree fn = builtin_decl_explicit (BUILT_IN_GOMP_CANCEL); | |
12213 | int mask = 0; | |
629b3d75 | 12214 | if (omp_find_clause (clauses, OMP_CLAUSE_PARALLEL)) |
acf0174b | 12215 | mask = 1; |
629b3d75 | 12216 | else if (omp_find_clause (clauses, OMP_CLAUSE_FOR)) |
acf0174b | 12217 | mask = 2; |
629b3d75 | 12218 | else if (omp_find_clause (clauses, OMP_CLAUSE_SECTIONS)) |
acf0174b | 12219 | mask = 4; |
629b3d75 | 12220 | else if (omp_find_clause (clauses, OMP_CLAUSE_TASKGROUP)) |
acf0174b JJ |
12221 | mask = 8; |
12222 | else | |
12223 | { | |
54d19c3b | 12224 | error_at (loc, "%<#pragma omp cancel%> must specify one of " |
acf0174b JJ |
12225 | "%<parallel%>, %<for%>, %<sections%> or %<taskgroup%> " |
12226 | "clauses"); | |
12227 | return; | |
12228 | } | |
629b3d75 | 12229 | tree ifc = omp_find_clause (clauses, OMP_CLAUSE_IF); |
acf0174b JJ |
12230 | if (ifc != NULL_TREE) |
12231 | { | |
12232 | tree type = TREE_TYPE (OMP_CLAUSE_IF_EXPR (ifc)); | |
12233 | ifc = fold_build2_loc (OMP_CLAUSE_LOCATION (ifc), NE_EXPR, | |
12234 | boolean_type_node, OMP_CLAUSE_IF_EXPR (ifc), | |
12235 | build_zero_cst (type)); | |
12236 | } | |
12237 | else | |
12238 | ifc = boolean_true_node; | |
12239 | tree stmt = build_call_expr_loc (loc, fn, 2, | |
12240 | build_int_cst (integer_type_node, mask), | |
12241 | ifc); | |
12242 | add_stmt (stmt); | |
12243 | } | |
12244 | ||
12245 | /* Generate GOMP_cancellation_point call for | |
12246 | #pragma omp cancellation point. */ | |
12247 | ||
12248 | void | |
12249 | c_finish_omp_cancellation_point (location_t loc, tree clauses) | |
12250 | { | |
12251 | tree fn = builtin_decl_explicit (BUILT_IN_GOMP_CANCELLATION_POINT); | |
12252 | int mask = 0; | |
629b3d75 | 12253 | if (omp_find_clause (clauses, OMP_CLAUSE_PARALLEL)) |
acf0174b | 12254 | mask = 1; |
629b3d75 | 12255 | else if (omp_find_clause (clauses, OMP_CLAUSE_FOR)) |
acf0174b | 12256 | mask = 2; |
629b3d75 | 12257 | else if (omp_find_clause (clauses, OMP_CLAUSE_SECTIONS)) |
acf0174b | 12258 | mask = 4; |
629b3d75 | 12259 | else if (omp_find_clause (clauses, OMP_CLAUSE_TASKGROUP)) |
acf0174b JJ |
12260 | mask = 8; |
12261 | else | |
12262 | { | |
54d19c3b | 12263 | error_at (loc, "%<#pragma omp cancellation point%> must specify one of " |
acf0174b JJ |
12264 | "%<parallel%>, %<for%>, %<sections%> or %<taskgroup%> " |
12265 | "clauses"); | |
12266 | return; | |
12267 | } | |
12268 | tree stmt = build_call_expr_loc (loc, fn, 1, | |
12269 | build_int_cst (integer_type_node, mask)); | |
12270 | add_stmt (stmt); | |
12271 | } | |
12272 | ||
12273 | /* Helper function for handle_omp_array_sections. Called recursively | |
12274 | to handle multiple array-section-subscripts. C is the clause, | |
12275 | T current expression (initially OMP_CLAUSE_DECL), which is either | |
12276 | a TREE_LIST for array-section-subscript (TREE_PURPOSE is low-bound | |
12277 | expression if specified, TREE_VALUE length expression if specified, | |
12278 | TREE_CHAIN is what it has been specified after, or some decl. | |
12279 | TYPES vector is populated with array section types, MAYBE_ZERO_LEN | |
12280 | set to true if any of the array-section-subscript could have length | |
12281 | of zero (explicit or implicit), FIRST_NON_ONE is the index of the | |
12282 | first array-section-subscript which is known not to have length | |
12283 | of one. Given say: | |
12284 | map(a[:b][2:1][:c][:2][:d][e:f][2:5]) | |
12285 | FIRST_NON_ONE will be 3, array-section-subscript [:b], [2:1] and [:c] | |
12286 | all are or may have length of 1, array-section-subscript [:2] is the | |
d9a6bd32 | 12287 | first one known not to have length 1. For array-section-subscript |
acf0174b JJ |
12288 | <= FIRST_NON_ONE we diagnose non-contiguous arrays if low bound isn't |
12289 | 0 or length isn't the array domain max + 1, for > FIRST_NON_ONE we | |
12290 | can if MAYBE_ZERO_LEN is false. MAYBE_ZERO_LEN will be true in the above | |
12291 | case though, as some lengths could be zero. */ | |
12292 | ||
12293 | static tree | |
12294 | handle_omp_array_sections_1 (tree c, tree t, vec<tree> &types, | |
d9a6bd32 | 12295 | bool &maybe_zero_len, unsigned int &first_non_one, |
e46c7770 | 12296 | enum c_omp_region_type ort) |
acf0174b JJ |
12297 | { |
12298 | tree ret, low_bound, length, type; | |
12299 | if (TREE_CODE (t) != TREE_LIST) | |
12300 | { | |
7a0ca710 | 12301 | if (error_operand_p (t)) |
acf0174b | 12302 | return error_mark_node; |
d9a6bd32 | 12303 | ret = t; |
9dc5773f JJ |
12304 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND |
12305 | && TYPE_ATOMIC (strip_array_types (TREE_TYPE (t)))) | |
12306 | { | |
12307 | error_at (OMP_CLAUSE_LOCATION (c), "%<_Atomic%> %qE in %qs clause", | |
12308 | t, omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12309 | return error_mark_node; | |
12310 | } | |
d9a6bd32 | 12311 | if (TREE_CODE (t) == COMPONENT_REF |
e46c7770 | 12312 | && ort == C_ORT_OMP |
d9a6bd32 JJ |
12313 | && (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP |
12314 | || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_TO | |
12315 | || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FROM)) | |
12316 | { | |
12317 | if (DECL_BIT_FIELD (TREE_OPERAND (t, 1))) | |
12318 | { | |
12319 | error_at (OMP_CLAUSE_LOCATION (c), | |
12320 | "bit-field %qE in %qs clause", | |
12321 | t, omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12322 | return error_mark_node; | |
12323 | } | |
12324 | while (TREE_CODE (t) == COMPONENT_REF) | |
12325 | { | |
12326 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == UNION_TYPE) | |
12327 | { | |
12328 | error_at (OMP_CLAUSE_LOCATION (c), | |
12329 | "%qE is a member of a union", t); | |
12330 | return error_mark_node; | |
12331 | } | |
12332 | t = TREE_OPERAND (t, 0); | |
12333 | } | |
12334 | } | |
0ae9bd27 | 12335 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
acf0174b JJ |
12336 | { |
12337 | if (DECL_P (t)) | |
12338 | error_at (OMP_CLAUSE_LOCATION (c), | |
12339 | "%qD is not a variable in %qs clause", t, | |
12340 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12341 | else | |
12342 | error_at (OMP_CLAUSE_LOCATION (c), | |
12343 | "%qE is not a variable in %qs clause", t, | |
12344 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12345 | return error_mark_node; | |
12346 | } | |
12347 | else if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND | |
9dc5773f JJ |
12348 | && TYPE_ATOMIC (TREE_TYPE (t))) |
12349 | { | |
12350 | error_at (OMP_CLAUSE_LOCATION (c), "%<_Atomic%> %qD in %qs clause", | |
12351 | t, omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12352 | return error_mark_node; | |
12353 | } | |
12354 | else if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND | |
12355 | && VAR_P (t) | |
12356 | && DECL_THREAD_LOCAL_P (t)) | |
acf0174b JJ |
12357 | { |
12358 | error_at (OMP_CLAUSE_LOCATION (c), | |
12359 | "%qD is threadprivate variable in %qs clause", t, | |
12360 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12361 | return error_mark_node; | |
12362 | } | |
9dc5773f JJ |
12363 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND |
12364 | && TYPE_ATOMIC (TREE_TYPE (t)) | |
12365 | && POINTER_TYPE_P (TREE_TYPE (t))) | |
12366 | { | |
12367 | /* If the array section is pointer based and the pointer | |
12368 | itself is _Atomic qualified, we need to atomically load | |
12369 | the pointer. */ | |
12370 | c_expr expr; | |
12371 | memset (&expr, 0, sizeof (expr)); | |
12372 | expr.value = ret; | |
12373 | expr = convert_lvalue_to_rvalue (OMP_CLAUSE_LOCATION (c), | |
12374 | expr, false, false); | |
12375 | ret = expr.value; | |
12376 | } | |
d9a6bd32 | 12377 | return ret; |
acf0174b JJ |
12378 | } |
12379 | ||
12380 | ret = handle_omp_array_sections_1 (c, TREE_CHAIN (t), types, | |
e46c7770 | 12381 | maybe_zero_len, first_non_one, ort); |
acf0174b JJ |
12382 | if (ret == error_mark_node || ret == NULL_TREE) |
12383 | return ret; | |
12384 | ||
12385 | type = TREE_TYPE (ret); | |
12386 | low_bound = TREE_PURPOSE (t); | |
12387 | length = TREE_VALUE (t); | |
12388 | ||
12389 | if (low_bound == error_mark_node || length == error_mark_node) | |
12390 | return error_mark_node; | |
12391 | ||
12392 | if (low_bound && !INTEGRAL_TYPE_P (TREE_TYPE (low_bound))) | |
12393 | { | |
12394 | error_at (OMP_CLAUSE_LOCATION (c), | |
12395 | "low bound %qE of array section does not have integral type", | |
12396 | low_bound); | |
12397 | return error_mark_node; | |
12398 | } | |
12399 | if (length && !INTEGRAL_TYPE_P (TREE_TYPE (length))) | |
12400 | { | |
12401 | error_at (OMP_CLAUSE_LOCATION (c), | |
12402 | "length %qE of array section does not have integral type", | |
12403 | length); | |
12404 | return error_mark_node; | |
12405 | } | |
12406 | if (low_bound | |
12407 | && TREE_CODE (low_bound) == INTEGER_CST | |
12408 | && TYPE_PRECISION (TREE_TYPE (low_bound)) | |
12409 | > TYPE_PRECISION (sizetype)) | |
12410 | low_bound = fold_convert (sizetype, low_bound); | |
12411 | if (length | |
12412 | && TREE_CODE (length) == INTEGER_CST | |
12413 | && TYPE_PRECISION (TREE_TYPE (length)) | |
12414 | > TYPE_PRECISION (sizetype)) | |
12415 | length = fold_convert (sizetype, length); | |
12416 | if (low_bound == NULL_TREE) | |
12417 | low_bound = integer_zero_node; | |
12418 | ||
12419 | if (length != NULL_TREE) | |
12420 | { | |
12421 | if (!integer_nonzerop (length)) | |
d9a6bd32 JJ |
12422 | { |
12423 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND | |
12424 | || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION) | |
12425 | { | |
12426 | if (integer_zerop (length)) | |
12427 | { | |
12428 | error_at (OMP_CLAUSE_LOCATION (c), | |
12429 | "zero length array section in %qs clause", | |
12430 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12431 | return error_mark_node; | |
12432 | } | |
12433 | } | |
12434 | else | |
12435 | maybe_zero_len = true; | |
12436 | } | |
acf0174b JJ |
12437 | if (first_non_one == types.length () |
12438 | && (TREE_CODE (length) != INTEGER_CST || integer_onep (length))) | |
12439 | first_non_one++; | |
12440 | } | |
12441 | if (TREE_CODE (type) == ARRAY_TYPE) | |
12442 | { | |
12443 | if (length == NULL_TREE | |
12444 | && (TYPE_DOMAIN (type) == NULL_TREE | |
12445 | || TYPE_MAX_VALUE (TYPE_DOMAIN (type)) == NULL_TREE)) | |
12446 | { | |
12447 | error_at (OMP_CLAUSE_LOCATION (c), | |
12448 | "for unknown bound array type length expression must " | |
12449 | "be specified"); | |
12450 | return error_mark_node; | |
12451 | } | |
12452 | if (TREE_CODE (low_bound) == INTEGER_CST | |
12453 | && tree_int_cst_sgn (low_bound) == -1) | |
12454 | { | |
12455 | error_at (OMP_CLAUSE_LOCATION (c), | |
12456 | "negative low bound in array section in %qs clause", | |
12457 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12458 | return error_mark_node; | |
12459 | } | |
12460 | if (length != NULL_TREE | |
12461 | && TREE_CODE (length) == INTEGER_CST | |
12462 | && tree_int_cst_sgn (length) == -1) | |
12463 | { | |
12464 | error_at (OMP_CLAUSE_LOCATION (c), | |
12465 | "negative length in array section in %qs clause", | |
12466 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12467 | return error_mark_node; | |
12468 | } | |
12469 | if (TYPE_DOMAIN (type) | |
12470 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) | |
12471 | && TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) | |
12472 | == INTEGER_CST) | |
12473 | { | |
8ab7005b JJ |
12474 | tree size |
12475 | = fold_convert (sizetype, TYPE_MAX_VALUE (TYPE_DOMAIN (type))); | |
12476 | size = size_binop (PLUS_EXPR, size, size_one_node); | |
acf0174b JJ |
12477 | if (TREE_CODE (low_bound) == INTEGER_CST) |
12478 | { | |
12479 | if (tree_int_cst_lt (size, low_bound)) | |
12480 | { | |
12481 | error_at (OMP_CLAUSE_LOCATION (c), | |
12482 | "low bound %qE above array section size " | |
12483 | "in %qs clause", low_bound, | |
12484 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12485 | return error_mark_node; | |
12486 | } | |
12487 | if (tree_int_cst_equal (size, low_bound)) | |
d9a6bd32 JJ |
12488 | { |
12489 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND | |
12490 | || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION) | |
12491 | { | |
12492 | error_at (OMP_CLAUSE_LOCATION (c), | |
12493 | "zero length array section in %qs clause", | |
12494 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12495 | return error_mark_node; | |
12496 | } | |
12497 | maybe_zero_len = true; | |
12498 | } | |
acf0174b JJ |
12499 | else if (length == NULL_TREE |
12500 | && first_non_one == types.length () | |
12501 | && tree_int_cst_equal | |
12502 | (TYPE_MAX_VALUE (TYPE_DOMAIN (type)), | |
12503 | low_bound)) | |
12504 | first_non_one++; | |
12505 | } | |
12506 | else if (length == NULL_TREE) | |
12507 | { | |
d9a6bd32 JJ |
12508 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND |
12509 | && OMP_CLAUSE_CODE (c) != OMP_CLAUSE_REDUCTION) | |
12510 | maybe_zero_len = true; | |
acf0174b JJ |
12511 | if (first_non_one == types.length ()) |
12512 | first_non_one++; | |
12513 | } | |
12514 | if (length && TREE_CODE (length) == INTEGER_CST) | |
12515 | { | |
12516 | if (tree_int_cst_lt (size, length)) | |
12517 | { | |
12518 | error_at (OMP_CLAUSE_LOCATION (c), | |
12519 | "length %qE above array section size " | |
12520 | "in %qs clause", length, | |
12521 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12522 | return error_mark_node; | |
12523 | } | |
12524 | if (TREE_CODE (low_bound) == INTEGER_CST) | |
12525 | { | |
12526 | tree lbpluslen | |
12527 | = size_binop (PLUS_EXPR, | |
12528 | fold_convert (sizetype, low_bound), | |
12529 | fold_convert (sizetype, length)); | |
12530 | if (TREE_CODE (lbpluslen) == INTEGER_CST | |
12531 | && tree_int_cst_lt (size, lbpluslen)) | |
12532 | { | |
12533 | error_at (OMP_CLAUSE_LOCATION (c), | |
12534 | "high bound %qE above array section size " | |
12535 | "in %qs clause", lbpluslen, | |
12536 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12537 | return error_mark_node; | |
12538 | } | |
12539 | } | |
12540 | } | |
12541 | } | |
12542 | else if (length == NULL_TREE) | |
12543 | { | |
d9a6bd32 JJ |
12544 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND |
12545 | && OMP_CLAUSE_CODE (c) != OMP_CLAUSE_REDUCTION) | |
12546 | maybe_zero_len = true; | |
acf0174b JJ |
12547 | if (first_non_one == types.length ()) |
12548 | first_non_one++; | |
12549 | } | |
12550 | ||
12551 | /* For [lb:] we will need to evaluate lb more than once. */ | |
12552 | if (length == NULL_TREE && OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND) | |
12553 | { | |
b2fa0a8b | 12554 | tree lb = save_expr (low_bound); |
acf0174b JJ |
12555 | if (lb != low_bound) |
12556 | { | |
12557 | TREE_PURPOSE (t) = lb; | |
12558 | low_bound = lb; | |
12559 | } | |
12560 | } | |
12561 | } | |
12562 | else if (TREE_CODE (type) == POINTER_TYPE) | |
12563 | { | |
12564 | if (length == NULL_TREE) | |
12565 | { | |
12566 | error_at (OMP_CLAUSE_LOCATION (c), | |
12567 | "for pointer type length expression must be specified"); | |
12568 | return error_mark_node; | |
12569 | } | |
d9a6bd32 JJ |
12570 | if (length != NULL_TREE |
12571 | && TREE_CODE (length) == INTEGER_CST | |
12572 | && tree_int_cst_sgn (length) == -1) | |
12573 | { | |
12574 | error_at (OMP_CLAUSE_LOCATION (c), | |
12575 | "negative length in array section in %qs clause", | |
12576 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12577 | return error_mark_node; | |
12578 | } | |
acf0174b JJ |
12579 | /* If there is a pointer type anywhere but in the very first |
12580 | array-section-subscript, the array section can't be contiguous. */ | |
12581 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND | |
12582 | && TREE_CODE (TREE_CHAIN (t)) == TREE_LIST) | |
12583 | { | |
12584 | error_at (OMP_CLAUSE_LOCATION (c), | |
12585 | "array section is not contiguous in %qs clause", | |
12586 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12587 | return error_mark_node; | |
12588 | } | |
12589 | } | |
12590 | else | |
12591 | { | |
12592 | error_at (OMP_CLAUSE_LOCATION (c), | |
12593 | "%qE does not have pointer or array type", ret); | |
12594 | return error_mark_node; | |
12595 | } | |
12596 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND) | |
12597 | types.safe_push (TREE_TYPE (ret)); | |
12598 | /* We will need to evaluate lb more than once. */ | |
b2fa0a8b | 12599 | tree lb = save_expr (low_bound); |
acf0174b JJ |
12600 | if (lb != low_bound) |
12601 | { | |
12602 | TREE_PURPOSE (t) = lb; | |
12603 | low_bound = lb; | |
12604 | } | |
12605 | ret = build_array_ref (OMP_CLAUSE_LOCATION (c), ret, low_bound); | |
12606 | return ret; | |
12607 | } | |
12608 | ||
12609 | /* Handle array sections for clause C. */ | |
12610 | ||
12611 | static bool | |
e46c7770 | 12612 | handle_omp_array_sections (tree c, enum c_omp_region_type ort) |
acf0174b JJ |
12613 | { |
12614 | bool maybe_zero_len = false; | |
12615 | unsigned int first_non_one = 0; | |
d9a6bd32 | 12616 | auto_vec<tree, 10> types; |
acf0174b | 12617 | tree first = handle_omp_array_sections_1 (c, OMP_CLAUSE_DECL (c), types, |
d9a6bd32 | 12618 | maybe_zero_len, first_non_one, |
e46c7770 | 12619 | ort); |
acf0174b | 12620 | if (first == error_mark_node) |
d9a6bd32 | 12621 | return true; |
acf0174b | 12622 | if (first == NULL_TREE) |
d9a6bd32 | 12623 | return false; |
acf0174b JJ |
12624 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND) |
12625 | { | |
12626 | tree t = OMP_CLAUSE_DECL (c); | |
12627 | tree tem = NULL_TREE; | |
acf0174b JJ |
12628 | /* Need to evaluate side effects in the length expressions |
12629 | if any. */ | |
12630 | while (TREE_CODE (t) == TREE_LIST) | |
12631 | { | |
12632 | if (TREE_VALUE (t) && TREE_SIDE_EFFECTS (TREE_VALUE (t))) | |
12633 | { | |
12634 | if (tem == NULL_TREE) | |
12635 | tem = TREE_VALUE (t); | |
12636 | else | |
12637 | tem = build2 (COMPOUND_EXPR, TREE_TYPE (tem), | |
12638 | TREE_VALUE (t), tem); | |
12639 | } | |
12640 | t = TREE_CHAIN (t); | |
12641 | } | |
12642 | if (tem) | |
12643 | first = build2 (COMPOUND_EXPR, TREE_TYPE (first), tem, first); | |
f9c59f7e | 12644 | first = c_fully_fold (first, false, NULL, true); |
acf0174b JJ |
12645 | OMP_CLAUSE_DECL (c) = first; |
12646 | } | |
12647 | else | |
12648 | { | |
12649 | unsigned int num = types.length (), i; | |
12650 | tree t, side_effects = NULL_TREE, size = NULL_TREE; | |
12651 | tree condition = NULL_TREE; | |
12652 | ||
12653 | if (int_size_in_bytes (TREE_TYPE (first)) <= 0) | |
12654 | maybe_zero_len = true; | |
12655 | ||
12656 | for (i = num, t = OMP_CLAUSE_DECL (c); i > 0; | |
12657 | t = TREE_CHAIN (t)) | |
12658 | { | |
12659 | tree low_bound = TREE_PURPOSE (t); | |
12660 | tree length = TREE_VALUE (t); | |
12661 | ||
12662 | i--; | |
12663 | if (low_bound | |
12664 | && TREE_CODE (low_bound) == INTEGER_CST | |
12665 | && TYPE_PRECISION (TREE_TYPE (low_bound)) | |
12666 | > TYPE_PRECISION (sizetype)) | |
12667 | low_bound = fold_convert (sizetype, low_bound); | |
12668 | if (length | |
12669 | && TREE_CODE (length) == INTEGER_CST | |
12670 | && TYPE_PRECISION (TREE_TYPE (length)) | |
12671 | > TYPE_PRECISION (sizetype)) | |
12672 | length = fold_convert (sizetype, length); | |
12673 | if (low_bound == NULL_TREE) | |
12674 | low_bound = integer_zero_node; | |
12675 | if (!maybe_zero_len && i > first_non_one) | |
12676 | { | |
12677 | if (integer_nonzerop (low_bound)) | |
12678 | goto do_warn_noncontiguous; | |
12679 | if (length != NULL_TREE | |
12680 | && TREE_CODE (length) == INTEGER_CST | |
12681 | && TYPE_DOMAIN (types[i]) | |
12682 | && TYPE_MAX_VALUE (TYPE_DOMAIN (types[i])) | |
12683 | && TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (types[i]))) | |
12684 | == INTEGER_CST) | |
12685 | { | |
12686 | tree size; | |
12687 | size = size_binop (PLUS_EXPR, | |
12688 | TYPE_MAX_VALUE (TYPE_DOMAIN (types[i])), | |
12689 | size_one_node); | |
12690 | if (!tree_int_cst_equal (length, size)) | |
12691 | { | |
12692 | do_warn_noncontiguous: | |
12693 | error_at (OMP_CLAUSE_LOCATION (c), | |
12694 | "array section is not contiguous in %qs " | |
12695 | "clause", | |
12696 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
acf0174b JJ |
12697 | return true; |
12698 | } | |
12699 | } | |
12700 | if (length != NULL_TREE | |
12701 | && TREE_SIDE_EFFECTS (length)) | |
12702 | { | |
12703 | if (side_effects == NULL_TREE) | |
12704 | side_effects = length; | |
12705 | else | |
12706 | side_effects = build2 (COMPOUND_EXPR, | |
12707 | TREE_TYPE (side_effects), | |
12708 | length, side_effects); | |
12709 | } | |
12710 | } | |
12711 | else | |
12712 | { | |
12713 | tree l; | |
12714 | ||
d9a6bd32 JJ |
12715 | if (i > first_non_one |
12716 | && ((length && integer_nonzerop (length)) | |
12717 | || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION)) | |
acf0174b JJ |
12718 | continue; |
12719 | if (length) | |
12720 | l = fold_convert (sizetype, length); | |
12721 | else | |
12722 | { | |
12723 | l = size_binop (PLUS_EXPR, | |
12724 | TYPE_MAX_VALUE (TYPE_DOMAIN (types[i])), | |
12725 | size_one_node); | |
12726 | l = size_binop (MINUS_EXPR, l, | |
12727 | fold_convert (sizetype, low_bound)); | |
12728 | } | |
12729 | if (i > first_non_one) | |
12730 | { | |
12731 | l = fold_build2 (NE_EXPR, boolean_type_node, l, | |
12732 | size_zero_node); | |
12733 | if (condition == NULL_TREE) | |
12734 | condition = l; | |
12735 | else | |
12736 | condition = fold_build2 (BIT_AND_EXPR, boolean_type_node, | |
12737 | l, condition); | |
12738 | } | |
12739 | else if (size == NULL_TREE) | |
12740 | { | |
12741 | size = size_in_bytes (TREE_TYPE (types[i])); | |
d9a6bd32 JJ |
12742 | tree eltype = TREE_TYPE (types[num - 1]); |
12743 | while (TREE_CODE (eltype) == ARRAY_TYPE) | |
12744 | eltype = TREE_TYPE (eltype); | |
12745 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION) | |
12746 | { | |
12747 | if (integer_zerop (size) | |
12748 | || integer_zerop (size_in_bytes (eltype))) | |
12749 | { | |
12750 | error_at (OMP_CLAUSE_LOCATION (c), | |
12751 | "zero length array section in %qs clause", | |
12752 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
12753 | return error_mark_node; | |
12754 | } | |
12755 | size = size_binop (EXACT_DIV_EXPR, size, | |
12756 | size_in_bytes (eltype)); | |
12757 | } | |
acf0174b JJ |
12758 | size = size_binop (MULT_EXPR, size, l); |
12759 | if (condition) | |
12760 | size = fold_build3 (COND_EXPR, sizetype, condition, | |
12761 | size, size_zero_node); | |
12762 | } | |
12763 | else | |
12764 | size = size_binop (MULT_EXPR, size, l); | |
12765 | } | |
12766 | } | |
acf0174b JJ |
12767 | if (side_effects) |
12768 | size = build2 (COMPOUND_EXPR, sizetype, side_effects, size); | |
d9a6bd32 JJ |
12769 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION) |
12770 | { | |
12771 | size = size_binop (MINUS_EXPR, size, size_one_node); | |
12772 | size = c_fully_fold (size, false, NULL); | |
12773 | tree index_type = build_index_type (size); | |
12774 | tree eltype = TREE_TYPE (first); | |
12775 | while (TREE_CODE (eltype) == ARRAY_TYPE) | |
12776 | eltype = TREE_TYPE (eltype); | |
12777 | tree type = build_array_type (eltype, index_type); | |
12778 | tree ptype = build_pointer_type (eltype); | |
12779 | if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE) | |
12780 | t = build_fold_addr_expr (t); | |
e01d41e5 JJ |
12781 | tree t2 = build_fold_addr_expr (first); |
12782 | t2 = fold_convert_loc (OMP_CLAUSE_LOCATION (c), | |
12783 | ptrdiff_type_node, t2); | |
12784 | t2 = fold_build2_loc (OMP_CLAUSE_LOCATION (c), MINUS_EXPR, | |
12785 | ptrdiff_type_node, t2, | |
12786 | fold_convert_loc (OMP_CLAUSE_LOCATION (c), | |
12787 | ptrdiff_type_node, t)); | |
12788 | t2 = c_fully_fold (t2, false, NULL); | |
12789 | if (tree_fits_shwi_p (t2)) | |
12790 | t = build2 (MEM_REF, type, t, | |
12791 | build_int_cst (ptype, tree_to_shwi (t2))); | |
12792 | else | |
12793 | { | |
12794 | t2 = fold_convert_loc (OMP_CLAUSE_LOCATION (c), sizetype, t2); | |
12795 | t = build2_loc (OMP_CLAUSE_LOCATION (c), POINTER_PLUS_EXPR, | |
12796 | TREE_TYPE (t), t, t2); | |
12797 | t = build2 (MEM_REF, type, t, build_int_cst (ptype, 0)); | |
12798 | } | |
d9a6bd32 JJ |
12799 | OMP_CLAUSE_DECL (c) = t; |
12800 | return false; | |
12801 | } | |
acf0174b JJ |
12802 | first = c_fully_fold (first, false, NULL); |
12803 | OMP_CLAUSE_DECL (c) = first; | |
12804 | if (size) | |
12805 | size = c_fully_fold (size, false, NULL); | |
12806 | OMP_CLAUSE_SIZE (c) = size; | |
d9a6bd32 JJ |
12807 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_MAP |
12808 | || (TREE_CODE (t) == COMPONENT_REF | |
12809 | && TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE)) | |
acf0174b | 12810 | return false; |
41dbbb37 | 12811 | gcc_assert (OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_FORCE_DEVICEPTR); |
e46c7770 | 12812 | if (ort == C_ORT_OMP || ort == C_ORT_ACC) |
d9a6bd32 JJ |
12813 | switch (OMP_CLAUSE_MAP_KIND (c)) |
12814 | { | |
12815 | case GOMP_MAP_ALLOC: | |
12816 | case GOMP_MAP_TO: | |
12817 | case GOMP_MAP_FROM: | |
12818 | case GOMP_MAP_TOFROM: | |
12819 | case GOMP_MAP_ALWAYS_TO: | |
12820 | case GOMP_MAP_ALWAYS_FROM: | |
12821 | case GOMP_MAP_ALWAYS_TOFROM: | |
12822 | case GOMP_MAP_RELEASE: | |
12823 | case GOMP_MAP_DELETE: | |
b1c9c068 CP |
12824 | case GOMP_MAP_FORCE_TO: |
12825 | case GOMP_MAP_FORCE_FROM: | |
12826 | case GOMP_MAP_FORCE_TOFROM: | |
12827 | case GOMP_MAP_FORCE_PRESENT: | |
d9a6bd32 JJ |
12828 | OMP_CLAUSE_MAP_MAYBE_ZERO_LENGTH_ARRAY_SECTION (c) = 1; |
12829 | break; | |
12830 | default: | |
12831 | break; | |
12832 | } | |
acf0174b | 12833 | tree c2 = build_omp_clause (OMP_CLAUSE_LOCATION (c), OMP_CLAUSE_MAP); |
e46c7770 | 12834 | if (ort != C_ORT_OMP && ort != C_ORT_ACC) |
e01d41e5 JJ |
12835 | OMP_CLAUSE_SET_MAP_KIND (c2, GOMP_MAP_POINTER); |
12836 | else if (TREE_CODE (t) == COMPONENT_REF) | |
12837 | OMP_CLAUSE_SET_MAP_KIND (c2, GOMP_MAP_ALWAYS_POINTER); | |
12838 | else | |
12839 | OMP_CLAUSE_SET_MAP_KIND (c2, GOMP_MAP_FIRSTPRIVATE_POINTER); | |
12840 | if (OMP_CLAUSE_MAP_KIND (c2) != GOMP_MAP_FIRSTPRIVATE_POINTER | |
12841 | && !c_mark_addressable (t)) | |
acf0174b JJ |
12842 | return false; |
12843 | OMP_CLAUSE_DECL (c2) = t; | |
12844 | t = build_fold_addr_expr (first); | |
12845 | t = fold_convert_loc (OMP_CLAUSE_LOCATION (c), ptrdiff_type_node, t); | |
12846 | tree ptr = OMP_CLAUSE_DECL (c2); | |
12847 | if (!POINTER_TYPE_P (TREE_TYPE (ptr))) | |
12848 | ptr = build_fold_addr_expr (ptr); | |
12849 | t = fold_build2_loc (OMP_CLAUSE_LOCATION (c), MINUS_EXPR, | |
12850 | ptrdiff_type_node, t, | |
12851 | fold_convert_loc (OMP_CLAUSE_LOCATION (c), | |
12852 | ptrdiff_type_node, ptr)); | |
12853 | t = c_fully_fold (t, false, NULL); | |
12854 | OMP_CLAUSE_SIZE (c2) = t; | |
12855 | OMP_CLAUSE_CHAIN (c2) = OMP_CLAUSE_CHAIN (c); | |
12856 | OMP_CLAUSE_CHAIN (c) = c2; | |
12857 | } | |
12858 | return false; | |
12859 | } | |
12860 | ||
12861 | /* Helper function of finish_omp_clauses. Clone STMT as if we were making | |
12862 | an inline call. But, remap | |
12863 | the OMP_DECL1 VAR_DECL (omp_out resp. omp_orig) to PLACEHOLDER | |
12864 | and OMP_DECL2 VAR_DECL (omp_in resp. omp_priv) to DECL. */ | |
12865 | ||
12866 | static tree | |
12867 | c_clone_omp_udr (tree stmt, tree omp_decl1, tree omp_decl2, | |
12868 | tree decl, tree placeholder) | |
12869 | { | |
12870 | copy_body_data id; | |
b787e7a2 | 12871 | hash_map<tree, tree> decl_map; |
acf0174b | 12872 | |
b787e7a2 TS |
12873 | decl_map.put (omp_decl1, placeholder); |
12874 | decl_map.put (omp_decl2, decl); | |
acf0174b JJ |
12875 | memset (&id, 0, sizeof (id)); |
12876 | id.src_fn = DECL_CONTEXT (omp_decl1); | |
12877 | id.dst_fn = current_function_decl; | |
12878 | id.src_cfun = DECL_STRUCT_FUNCTION (id.src_fn); | |
b787e7a2 | 12879 | id.decl_map = &decl_map; |
acf0174b JJ |
12880 | |
12881 | id.copy_decl = copy_decl_no_change; | |
12882 | id.transform_call_graph_edges = CB_CGE_DUPLICATE; | |
12883 | id.transform_new_cfg = true; | |
12884 | id.transform_return_to_modify = false; | |
12885 | id.transform_lang_insert_block = NULL; | |
12886 | id.eh_lp_nr = 0; | |
12887 | walk_tree (&stmt, copy_tree_body_r, &id, NULL); | |
acf0174b JJ |
12888 | return stmt; |
12889 | } | |
12890 | ||
12891 | /* Helper function of c_finish_omp_clauses, called via walk_tree. | |
12892 | Find OMP_CLAUSE_PLACEHOLDER (passed in DATA) in *TP. */ | |
12893 | ||
12894 | static tree | |
12895 | c_find_omp_placeholder_r (tree *tp, int *, void *data) | |
12896 | { | |
12897 | if (*tp == (tree) data) | |
12898 | return *tp; | |
12899 | return NULL_TREE; | |
12900 | } | |
12901 | ||
41dbbb37 | 12902 | /* For all elements of CLAUSES, validate them against their constraints. |
953ff289 DN |
12903 | Remove any elements from the list that are invalid. */ |
12904 | ||
12905 | tree | |
77886428 | 12906 | c_finish_omp_clauses (tree clauses, enum c_omp_region_type ort) |
953ff289 DN |
12907 | { |
12908 | bitmap_head generic_head, firstprivate_head, lastprivate_head; | |
e46c7770 | 12909 | bitmap_head aligned_head, map_head, map_field_head, oacc_reduction_head; |
d9a6bd32 JJ |
12910 | tree c, t, type, *pc; |
12911 | tree simdlen = NULL_TREE, safelen = NULL_TREE; | |
acf0174b JJ |
12912 | bool branch_seen = false; |
12913 | bool copyprivate_seen = false; | |
e01d41e5 | 12914 | bool linear_variable_step_check = false; |
acf0174b | 12915 | tree *nowait_clause = NULL; |
e01d41e5 JJ |
12916 | bool ordered_seen = false; |
12917 | tree schedule_clause = NULL_TREE; | |
b605f663 | 12918 | bool oacc_async = false; |
953ff289 DN |
12919 | |
12920 | bitmap_obstack_initialize (NULL); | |
12921 | bitmap_initialize (&generic_head, &bitmap_default_obstack); | |
12922 | bitmap_initialize (&firstprivate_head, &bitmap_default_obstack); | |
12923 | bitmap_initialize (&lastprivate_head, &bitmap_default_obstack); | |
acf0174b | 12924 | bitmap_initialize (&aligned_head, &bitmap_default_obstack); |
d9a6bd32 JJ |
12925 | bitmap_initialize (&map_head, &bitmap_default_obstack); |
12926 | bitmap_initialize (&map_field_head, &bitmap_default_obstack); | |
e46c7770 | 12927 | bitmap_initialize (&oacc_reduction_head, &bitmap_default_obstack); |
953ff289 | 12928 | |
b605f663 CLT |
12929 | if (ort & C_ORT_ACC) |
12930 | for (c = clauses; c; c = OMP_CLAUSE_CHAIN (c)) | |
12931 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_ASYNC) | |
12932 | { | |
12933 | oacc_async = true; | |
12934 | break; | |
12935 | } | |
9dc5773f | 12936 | |
953ff289 DN |
12937 | for (pc = &clauses, c = clauses; c ; c = *pc) |
12938 | { | |
12939 | bool remove = false; | |
12940 | bool need_complete = false; | |
12941 | bool need_implicitly_determined = false; | |
12942 | ||
aaf46ef9 | 12943 | switch (OMP_CLAUSE_CODE (c)) |
953ff289 DN |
12944 | { |
12945 | case OMP_CLAUSE_SHARED: | |
953ff289 DN |
12946 | need_implicitly_determined = true; |
12947 | goto check_dup_generic; | |
12948 | ||
12949 | case OMP_CLAUSE_PRIVATE: | |
953ff289 DN |
12950 | need_complete = true; |
12951 | need_implicitly_determined = true; | |
12952 | goto check_dup_generic; | |
12953 | ||
12954 | case OMP_CLAUSE_REDUCTION: | |
953ff289 DN |
12955 | need_implicitly_determined = true; |
12956 | t = OMP_CLAUSE_DECL (c); | |
d9a6bd32 JJ |
12957 | if (TREE_CODE (t) == TREE_LIST) |
12958 | { | |
e46c7770 | 12959 | if (handle_omp_array_sections (c, ort)) |
d9a6bd32 JJ |
12960 | { |
12961 | remove = true; | |
12962 | break; | |
12963 | } | |
12964 | ||
12965 | t = OMP_CLAUSE_DECL (c); | |
12966 | } | |
4f2e1536 | 12967 | t = require_complete_type (OMP_CLAUSE_LOCATION (c), t); |
d9a6bd32 JJ |
12968 | if (t == error_mark_node) |
12969 | { | |
12970 | remove = true; | |
12971 | break; | |
12972 | } | |
b605f663 CLT |
12973 | if (oacc_async) |
12974 | c_mark_addressable (t); | |
d9a6bd32 JJ |
12975 | type = TREE_TYPE (t); |
12976 | if (TREE_CODE (t) == MEM_REF) | |
12977 | type = TREE_TYPE (type); | |
12978 | if (TREE_CODE (type) == ARRAY_TYPE) | |
12979 | { | |
12980 | tree oatype = type; | |
12981 | gcc_assert (TREE_CODE (t) != MEM_REF); | |
12982 | while (TREE_CODE (type) == ARRAY_TYPE) | |
12983 | type = TREE_TYPE (type); | |
12984 | if (integer_zerop (TYPE_SIZE_UNIT (type))) | |
12985 | { | |
12986 | error_at (OMP_CLAUSE_LOCATION (c), | |
12987 | "%qD in %<reduction%> clause is a zero size array", | |
12988 | t); | |
12989 | remove = true; | |
12990 | break; | |
12991 | } | |
12992 | tree size = size_binop (EXACT_DIV_EXPR, TYPE_SIZE_UNIT (oatype), | |
12993 | TYPE_SIZE_UNIT (type)); | |
12994 | if (integer_zerop (size)) | |
12995 | { | |
12996 | error_at (OMP_CLAUSE_LOCATION (c), | |
12997 | "%qD in %<reduction%> clause is a zero size array", | |
12998 | t); | |
12999 | remove = true; | |
13000 | break; | |
13001 | } | |
13002 | size = size_binop (MINUS_EXPR, size, size_one_node); | |
13003 | tree index_type = build_index_type (size); | |
13004 | tree atype = build_array_type (type, index_type); | |
13005 | tree ptype = build_pointer_type (type); | |
13006 | if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE) | |
13007 | t = build_fold_addr_expr (t); | |
13008 | t = build2 (MEM_REF, atype, t, build_int_cst (ptype, 0)); | |
13009 | OMP_CLAUSE_DECL (c) = t; | |
13010 | } | |
9dc5773f JJ |
13011 | if (TYPE_ATOMIC (type)) |
13012 | { | |
13013 | error_at (OMP_CLAUSE_LOCATION (c), | |
13014 | "%<_Atomic%> %qE in %<reduction%> clause", t); | |
13015 | remove = true; | |
13016 | break; | |
13017 | } | |
acf0174b | 13018 | if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (c) == NULL_TREE |
d9a6bd32 JJ |
13019 | && (FLOAT_TYPE_P (type) |
13020 | || TREE_CODE (type) == COMPLEX_TYPE)) | |
953ff289 DN |
13021 | { |
13022 | enum tree_code r_code = OMP_CLAUSE_REDUCTION_CODE (c); | |
13023 | const char *r_name = NULL; | |
13024 | ||
13025 | switch (r_code) | |
13026 | { | |
13027 | case PLUS_EXPR: | |
13028 | case MULT_EXPR: | |
13029 | case MINUS_EXPR: | |
652fea39 | 13030 | break; |
20906c66 | 13031 | case MIN_EXPR: |
d9a6bd32 | 13032 | if (TREE_CODE (type) == COMPLEX_TYPE) |
652fea39 JJ |
13033 | r_name = "min"; |
13034 | break; | |
20906c66 | 13035 | case MAX_EXPR: |
d9a6bd32 | 13036 | if (TREE_CODE (type) == COMPLEX_TYPE) |
652fea39 | 13037 | r_name = "max"; |
953ff289 DN |
13038 | break; |
13039 | case BIT_AND_EXPR: | |
13040 | r_name = "&"; | |
13041 | break; | |
13042 | case BIT_XOR_EXPR: | |
13043 | r_name = "^"; | |
13044 | break; | |
13045 | case BIT_IOR_EXPR: | |
13046 | r_name = "|"; | |
13047 | break; | |
13048 | case TRUTH_ANDIF_EXPR: | |
d9a6bd32 | 13049 | if (FLOAT_TYPE_P (type)) |
652fea39 | 13050 | r_name = "&&"; |
953ff289 DN |
13051 | break; |
13052 | case TRUTH_ORIF_EXPR: | |
d9a6bd32 | 13053 | if (FLOAT_TYPE_P (type)) |
652fea39 | 13054 | r_name = "||"; |
953ff289 DN |
13055 | break; |
13056 | default: | |
13057 | gcc_unreachable (); | |
13058 | } | |
13059 | if (r_name) | |
13060 | { | |
c2255bc4 AH |
13061 | error_at (OMP_CLAUSE_LOCATION (c), |
13062 | "%qE has invalid type for %<reduction(%s)%>", | |
13063 | t, r_name); | |
953ff289 | 13064 | remove = true; |
ee1d5a02 | 13065 | break; |
953ff289 DN |
13066 | } |
13067 | } | |
acf0174b JJ |
13068 | else if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (c) == error_mark_node) |
13069 | { | |
13070 | error_at (OMP_CLAUSE_LOCATION (c), | |
d9a6bd32 | 13071 | "user defined reduction not found for %qE", t); |
acf0174b | 13072 | remove = true; |
ee1d5a02 | 13073 | break; |
acf0174b JJ |
13074 | } |
13075 | else if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (c)) | |
13076 | { | |
13077 | tree list = OMP_CLAUSE_REDUCTION_PLACEHOLDER (c); | |
d9a6bd32 | 13078 | type = TYPE_MAIN_VARIANT (type); |
acf0174b JJ |
13079 | tree placeholder = build_decl (OMP_CLAUSE_LOCATION (c), |
13080 | VAR_DECL, NULL_TREE, type); | |
d9a6bd32 | 13081 | tree decl_placeholder = NULL_TREE; |
acf0174b JJ |
13082 | OMP_CLAUSE_REDUCTION_PLACEHOLDER (c) = placeholder; |
13083 | DECL_ARTIFICIAL (placeholder) = 1; | |
13084 | DECL_IGNORED_P (placeholder) = 1; | |
d9a6bd32 JJ |
13085 | if (TREE_CODE (t) == MEM_REF) |
13086 | { | |
13087 | decl_placeholder = build_decl (OMP_CLAUSE_LOCATION (c), | |
13088 | VAR_DECL, NULL_TREE, type); | |
13089 | OMP_CLAUSE_REDUCTION_DECL_PLACEHOLDER (c) = decl_placeholder; | |
13090 | DECL_ARTIFICIAL (decl_placeholder) = 1; | |
13091 | DECL_IGNORED_P (decl_placeholder) = 1; | |
13092 | } | |
acf0174b JJ |
13093 | if (TREE_ADDRESSABLE (TREE_VEC_ELT (list, 0))) |
13094 | c_mark_addressable (placeholder); | |
13095 | if (TREE_ADDRESSABLE (TREE_VEC_ELT (list, 1))) | |
d9a6bd32 JJ |
13096 | c_mark_addressable (decl_placeholder ? decl_placeholder |
13097 | : OMP_CLAUSE_DECL (c)); | |
acf0174b JJ |
13098 | OMP_CLAUSE_REDUCTION_MERGE (c) |
13099 | = c_clone_omp_udr (TREE_VEC_ELT (list, 2), | |
13100 | TREE_VEC_ELT (list, 0), | |
13101 | TREE_VEC_ELT (list, 1), | |
d9a6bd32 JJ |
13102 | decl_placeholder ? decl_placeholder |
13103 | : OMP_CLAUSE_DECL (c), placeholder); | |
acf0174b JJ |
13104 | OMP_CLAUSE_REDUCTION_MERGE (c) |
13105 | = build3_loc (OMP_CLAUSE_LOCATION (c), BIND_EXPR, | |
13106 | void_type_node, NULL_TREE, | |
d9a6bd32 | 13107 | OMP_CLAUSE_REDUCTION_MERGE (c), NULL_TREE); |
acf0174b JJ |
13108 | TREE_SIDE_EFFECTS (OMP_CLAUSE_REDUCTION_MERGE (c)) = 1; |
13109 | if (TREE_VEC_LENGTH (list) == 6) | |
13110 | { | |
13111 | if (TREE_ADDRESSABLE (TREE_VEC_ELT (list, 3))) | |
d9a6bd32 JJ |
13112 | c_mark_addressable (decl_placeholder ? decl_placeholder |
13113 | : OMP_CLAUSE_DECL (c)); | |
acf0174b JJ |
13114 | if (TREE_ADDRESSABLE (TREE_VEC_ELT (list, 4))) |
13115 | c_mark_addressable (placeholder); | |
13116 | tree init = TREE_VEC_ELT (list, 5); | |
13117 | if (init == error_mark_node) | |
13118 | init = DECL_INITIAL (TREE_VEC_ELT (list, 3)); | |
13119 | OMP_CLAUSE_REDUCTION_INIT (c) | |
13120 | = c_clone_omp_udr (init, TREE_VEC_ELT (list, 4), | |
13121 | TREE_VEC_ELT (list, 3), | |
d9a6bd32 JJ |
13122 | decl_placeholder ? decl_placeholder |
13123 | : OMP_CLAUSE_DECL (c), placeholder); | |
acf0174b | 13124 | if (TREE_VEC_ELT (list, 5) == error_mark_node) |
d9a6bd32 JJ |
13125 | { |
13126 | tree v = decl_placeholder ? decl_placeholder : t; | |
13127 | OMP_CLAUSE_REDUCTION_INIT (c) | |
13128 | = build2 (INIT_EXPR, TREE_TYPE (v), v, | |
13129 | OMP_CLAUSE_REDUCTION_INIT (c)); | |
13130 | } | |
acf0174b JJ |
13131 | if (walk_tree (&OMP_CLAUSE_REDUCTION_INIT (c), |
13132 | c_find_omp_placeholder_r, | |
13133 | placeholder, NULL)) | |
13134 | OMP_CLAUSE_REDUCTION_OMP_ORIG_REF (c) = 1; | |
13135 | } | |
13136 | else | |
13137 | { | |
13138 | tree init; | |
d9a6bd32 JJ |
13139 | tree v = decl_placeholder ? decl_placeholder : t; |
13140 | if (AGGREGATE_TYPE_P (TREE_TYPE (v))) | |
13141 | init = build_constructor (TREE_TYPE (v), NULL); | |
acf0174b | 13142 | else |
d9a6bd32 | 13143 | init = fold_convert (TREE_TYPE (v), integer_zero_node); |
acf0174b | 13144 | OMP_CLAUSE_REDUCTION_INIT (c) |
d9a6bd32 | 13145 | = build2 (INIT_EXPR, TREE_TYPE (v), v, init); |
acf0174b JJ |
13146 | } |
13147 | OMP_CLAUSE_REDUCTION_INIT (c) | |
13148 | = build3_loc (OMP_CLAUSE_LOCATION (c), BIND_EXPR, | |
13149 | void_type_node, NULL_TREE, | |
13150 | OMP_CLAUSE_REDUCTION_INIT (c), NULL_TREE); | |
13151 | TREE_SIDE_EFFECTS (OMP_CLAUSE_REDUCTION_INIT (c)) = 1; | |
13152 | } | |
d9a6bd32 JJ |
13153 | if (TREE_CODE (t) == MEM_REF) |
13154 | { | |
13155 | if (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (t))) == NULL_TREE | |
13156 | || TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (t)))) | |
13157 | != INTEGER_CST) | |
13158 | { | |
13159 | sorry ("variable length element type in array " | |
13160 | "%<reduction%> clause"); | |
13161 | remove = true; | |
13162 | break; | |
13163 | } | |
13164 | t = TREE_OPERAND (t, 0); | |
e01d41e5 JJ |
13165 | if (TREE_CODE (t) == POINTER_PLUS_EXPR) |
13166 | t = TREE_OPERAND (t, 0); | |
d9a6bd32 JJ |
13167 | if (TREE_CODE (t) == ADDR_EXPR) |
13168 | t = TREE_OPERAND (t, 0); | |
13169 | } | |
13170 | goto check_dup_generic_t; | |
953ff289 DN |
13171 | |
13172 | case OMP_CLAUSE_COPYPRIVATE: | |
acf0174b JJ |
13173 | copyprivate_seen = true; |
13174 | if (nowait_clause) | |
13175 | { | |
13176 | error_at (OMP_CLAUSE_LOCATION (*nowait_clause), | |
13177 | "%<nowait%> clause must not be used together " | |
13178 | "with %<copyprivate%>"); | |
13179 | *nowait_clause = OMP_CLAUSE_CHAIN (*nowait_clause); | |
13180 | nowait_clause = NULL; | |
13181 | } | |
953ff289 DN |
13182 | goto check_dup_generic; |
13183 | ||
13184 | case OMP_CLAUSE_COPYIN: | |
953ff289 | 13185 | t = OMP_CLAUSE_DECL (c); |
0ae9bd27 | 13186 | if (!VAR_P (t) || !DECL_THREAD_LOCAL_P (t)) |
953ff289 | 13187 | { |
c2255bc4 AH |
13188 | error_at (OMP_CLAUSE_LOCATION (c), |
13189 | "%qE must be %<threadprivate%> for %<copyin%>", t); | |
953ff289 | 13190 | remove = true; |
ee1d5a02 | 13191 | break; |
953ff289 DN |
13192 | } |
13193 | goto check_dup_generic; | |
13194 | ||
acf0174b | 13195 | case OMP_CLAUSE_LINEAR: |
77886428 | 13196 | if (ort != C_ORT_OMP_DECLARE_SIMD) |
d9a6bd32 | 13197 | need_implicitly_determined = true; |
acf0174b | 13198 | t = OMP_CLAUSE_DECL (c); |
77886428 | 13199 | if (ort != C_ORT_OMP_DECLARE_SIMD |
d9a6bd32 JJ |
13200 | && OMP_CLAUSE_LINEAR_KIND (c) != OMP_CLAUSE_LINEAR_DEFAULT) |
13201 | { | |
13202 | error_at (OMP_CLAUSE_LOCATION (c), | |
13203 | "modifier should not be specified in %<linear%> " | |
13204 | "clause on %<simd%> or %<for%> constructs"); | |
13205 | OMP_CLAUSE_LINEAR_KIND (c) = OMP_CLAUSE_LINEAR_DEFAULT; | |
13206 | } | |
5e9d6aa4 JK |
13207 | if (!INTEGRAL_TYPE_P (TREE_TYPE (t)) |
13208 | && TREE_CODE (TREE_TYPE (t)) != POINTER_TYPE) | |
acf0174b | 13209 | { |
5e9d6aa4 JK |
13210 | error_at (OMP_CLAUSE_LOCATION (c), |
13211 | "linear clause applied to non-integral non-pointer " | |
13212 | "variable with type %qT", TREE_TYPE (t)); | |
13213 | remove = true; | |
13214 | break; | |
477d4906 | 13215 | } |
5e9d6aa4 | 13216 | if (TYPE_ATOMIC (TREE_TYPE (t))) |
477d4906 | 13217 | { |
5e9d6aa4 JK |
13218 | error_at (OMP_CLAUSE_LOCATION (c), |
13219 | "%<_Atomic%> %qD in %<linear%> clause", t); | |
13220 | remove = true; | |
13221 | break; | |
acf0174b | 13222 | } |
77886428 | 13223 | if (ort == C_ORT_OMP_DECLARE_SIMD) |
e01d41e5 JJ |
13224 | { |
13225 | tree s = OMP_CLAUSE_LINEAR_STEP (c); | |
13226 | if (TREE_CODE (s) == PARM_DECL) | |
13227 | { | |
13228 | OMP_CLAUSE_LINEAR_VARIABLE_STRIDE (c) = 1; | |
13229 | /* map_head bitmap is used as uniform_head if | |
13230 | declare_simd. */ | |
13231 | if (!bitmap_bit_p (&map_head, DECL_UID (s))) | |
13232 | linear_variable_step_check = true; | |
13233 | goto check_dup_generic; | |
13234 | } | |
13235 | if (TREE_CODE (s) != INTEGER_CST) | |
13236 | { | |
13237 | error_at (OMP_CLAUSE_LOCATION (c), | |
13238 | "%<linear%> clause step %qE is neither constant " | |
13239 | "nor a parameter", s); | |
13240 | remove = true; | |
13241 | break; | |
13242 | } | |
13243 | } | |
acf0174b JJ |
13244 | if (TREE_CODE (TREE_TYPE (OMP_CLAUSE_DECL (c))) == POINTER_TYPE) |
13245 | { | |
13246 | tree s = OMP_CLAUSE_LINEAR_STEP (c); | |
13247 | s = pointer_int_sum (OMP_CLAUSE_LOCATION (c), PLUS_EXPR, | |
13248 | OMP_CLAUSE_DECL (c), s); | |
13249 | s = fold_build2_loc (OMP_CLAUSE_LOCATION (c), MINUS_EXPR, | |
a8fc2579 RB |
13250 | sizetype, fold_convert (sizetype, s), |
13251 | fold_convert | |
13252 | (sizetype, OMP_CLAUSE_DECL (c))); | |
acf0174b JJ |
13253 | if (s == error_mark_node) |
13254 | s = size_one_node; | |
13255 | OMP_CLAUSE_LINEAR_STEP (c) = s; | |
13256 | } | |
da6f124d JJ |
13257 | else |
13258 | OMP_CLAUSE_LINEAR_STEP (c) | |
13259 | = fold_convert (TREE_TYPE (t), OMP_CLAUSE_LINEAR_STEP (c)); | |
acf0174b JJ |
13260 | goto check_dup_generic; |
13261 | ||
953ff289 DN |
13262 | check_dup_generic: |
13263 | t = OMP_CLAUSE_DECL (c); | |
d9a6bd32 | 13264 | check_dup_generic_t: |
0ae9bd27 | 13265 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
953ff289 | 13266 | { |
c2255bc4 | 13267 | error_at (OMP_CLAUSE_LOCATION (c), |
acf0174b JJ |
13268 | "%qE is not a variable in clause %qs", t, |
13269 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
953ff289 DN |
13270 | remove = true; |
13271 | } | |
e46c7770 CP |
13272 | else if (ort == C_ORT_ACC |
13273 | && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION) | |
13274 | { | |
13275 | if (bitmap_bit_p (&oacc_reduction_head, DECL_UID (t))) | |
13276 | { | |
13277 | error ("%qD appears more than once in reduction clauses", t); | |
13278 | remove = true; | |
13279 | } | |
13280 | else | |
13281 | bitmap_set_bit (&oacc_reduction_head, DECL_UID (t)); | |
13282 | } | |
953ff289 DN |
13283 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) |
13284 | || bitmap_bit_p (&firstprivate_head, DECL_UID (t)) | |
13285 | || bitmap_bit_p (&lastprivate_head, DECL_UID (t))) | |
13286 | { | |
c2255bc4 AH |
13287 | error_at (OMP_CLAUSE_LOCATION (c), |
13288 | "%qE appears more than once in data clauses", t); | |
953ff289 DN |
13289 | remove = true; |
13290 | } | |
e01d41e5 JJ |
13291 | else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_PRIVATE |
13292 | && bitmap_bit_p (&map_head, DECL_UID (t))) | |
13293 | { | |
e46c7770 CP |
13294 | if (ort == C_ORT_ACC) |
13295 | error ("%qD appears more than once in data clauses", t); | |
13296 | else | |
13297 | error ("%qD appears both in data and map clauses", t); | |
e01d41e5 JJ |
13298 | remove = true; |
13299 | } | |
953ff289 DN |
13300 | else |
13301 | bitmap_set_bit (&generic_head, DECL_UID (t)); | |
13302 | break; | |
13303 | ||
13304 | case OMP_CLAUSE_FIRSTPRIVATE: | |
953ff289 DN |
13305 | t = OMP_CLAUSE_DECL (c); |
13306 | need_complete = true; | |
13307 | need_implicitly_determined = true; | |
0ae9bd27 | 13308 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
953ff289 | 13309 | { |
c2255bc4 AH |
13310 | error_at (OMP_CLAUSE_LOCATION (c), |
13311 | "%qE is not a variable in clause %<firstprivate%>", t); | |
953ff289 DN |
13312 | remove = true; |
13313 | } | |
13314 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
13315 | || bitmap_bit_p (&firstprivate_head, DECL_UID (t))) | |
13316 | { | |
c2255bc4 AH |
13317 | error_at (OMP_CLAUSE_LOCATION (c), |
13318 | "%qE appears more than once in data clauses", t); | |
953ff289 DN |
13319 | remove = true; |
13320 | } | |
e01d41e5 JJ |
13321 | else if (bitmap_bit_p (&map_head, DECL_UID (t))) |
13322 | { | |
e46c7770 CP |
13323 | if (ort == C_ORT_ACC) |
13324 | error ("%qD appears more than once in data clauses", t); | |
13325 | else | |
13326 | error ("%qD appears both in data and map clauses", t); | |
e01d41e5 JJ |
13327 | remove = true; |
13328 | } | |
953ff289 DN |
13329 | else |
13330 | bitmap_set_bit (&firstprivate_head, DECL_UID (t)); | |
13331 | break; | |
13332 | ||
13333 | case OMP_CLAUSE_LASTPRIVATE: | |
953ff289 DN |
13334 | t = OMP_CLAUSE_DECL (c); |
13335 | need_complete = true; | |
13336 | need_implicitly_determined = true; | |
0ae9bd27 | 13337 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
953ff289 | 13338 | { |
c2255bc4 AH |
13339 | error_at (OMP_CLAUSE_LOCATION (c), |
13340 | "%qE is not a variable in clause %<lastprivate%>", t); | |
953ff289 DN |
13341 | remove = true; |
13342 | } | |
13343 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
13344 | || bitmap_bit_p (&lastprivate_head, DECL_UID (t))) | |
13345 | { | |
c2255bc4 AH |
13346 | error_at (OMP_CLAUSE_LOCATION (c), |
13347 | "%qE appears more than once in data clauses", t); | |
953ff289 DN |
13348 | remove = true; |
13349 | } | |
13350 | else | |
13351 | bitmap_set_bit (&lastprivate_head, DECL_UID (t)); | |
13352 | break; | |
13353 | ||
acf0174b JJ |
13354 | case OMP_CLAUSE_ALIGNED: |
13355 | t = OMP_CLAUSE_DECL (c); | |
0ae9bd27 | 13356 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
acf0174b JJ |
13357 | { |
13358 | error_at (OMP_CLAUSE_LOCATION (c), | |
13359 | "%qE is not a variable in %<aligned%> clause", t); | |
13360 | remove = true; | |
13361 | } | |
5a9785fb JJ |
13362 | else if (!POINTER_TYPE_P (TREE_TYPE (t)) |
13363 | && TREE_CODE (TREE_TYPE (t)) != ARRAY_TYPE) | |
13364 | { | |
13365 | error_at (OMP_CLAUSE_LOCATION (c), | |
13366 | "%qE in %<aligned%> clause is neither a pointer nor " | |
13367 | "an array", t); | |
13368 | remove = true; | |
13369 | } | |
9dc5773f JJ |
13370 | else if (TYPE_ATOMIC (TREE_TYPE (t))) |
13371 | { | |
13372 | error_at (OMP_CLAUSE_LOCATION (c), | |
13373 | "%<_Atomic%> %qD in %<aligned%> clause", t); | |
13374 | remove = true; | |
13375 | break; | |
13376 | } | |
acf0174b JJ |
13377 | else if (bitmap_bit_p (&aligned_head, DECL_UID (t))) |
13378 | { | |
13379 | error_at (OMP_CLAUSE_LOCATION (c), | |
13380 | "%qE appears more than once in %<aligned%> clauses", | |
13381 | t); | |
13382 | remove = true; | |
13383 | } | |
13384 | else | |
13385 | bitmap_set_bit (&aligned_head, DECL_UID (t)); | |
13386 | break; | |
13387 | ||
13388 | case OMP_CLAUSE_DEPEND: | |
13389 | t = OMP_CLAUSE_DECL (c); | |
d9a6bd32 JJ |
13390 | if (t == NULL_TREE) |
13391 | { | |
13392 | gcc_assert (OMP_CLAUSE_DEPEND_KIND (c) | |
13393 | == OMP_CLAUSE_DEPEND_SOURCE); | |
13394 | break; | |
13395 | } | |
13396 | if (OMP_CLAUSE_DEPEND_KIND (c) == OMP_CLAUSE_DEPEND_SINK) | |
13397 | { | |
13398 | gcc_assert (TREE_CODE (t) == TREE_LIST); | |
13399 | for (; t; t = TREE_CHAIN (t)) | |
13400 | { | |
13401 | tree decl = TREE_VALUE (t); | |
13402 | if (TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE) | |
13403 | { | |
13404 | tree offset = TREE_PURPOSE (t); | |
8e6cdc90 | 13405 | bool neg = wi::neg_p (wi::to_wide (offset)); |
d9a6bd32 JJ |
13406 | offset = fold_unary (ABS_EXPR, TREE_TYPE (offset), offset); |
13407 | tree t2 = pointer_int_sum (OMP_CLAUSE_LOCATION (c), | |
13408 | neg ? MINUS_EXPR : PLUS_EXPR, | |
13409 | decl, offset); | |
13410 | t2 = fold_build2_loc (OMP_CLAUSE_LOCATION (c), MINUS_EXPR, | |
a8fc2579 RB |
13411 | sizetype, |
13412 | fold_convert (sizetype, t2), | |
13413 | fold_convert (sizetype, decl)); | |
d9a6bd32 JJ |
13414 | if (t2 == error_mark_node) |
13415 | { | |
13416 | remove = true; | |
13417 | break; | |
13418 | } | |
13419 | TREE_PURPOSE (t) = t2; | |
13420 | } | |
13421 | } | |
13422 | break; | |
13423 | } | |
acf0174b JJ |
13424 | if (TREE_CODE (t) == TREE_LIST) |
13425 | { | |
e46c7770 | 13426 | if (handle_omp_array_sections (c, ort)) |
acf0174b JJ |
13427 | remove = true; |
13428 | break; | |
13429 | } | |
13430 | if (t == error_mark_node) | |
13431 | remove = true; | |
0ae9bd27 | 13432 | else if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
acf0174b JJ |
13433 | { |
13434 | error_at (OMP_CLAUSE_LOCATION (c), | |
13435 | "%qE is not a variable in %<depend%> clause", t); | |
13436 | remove = true; | |
13437 | } | |
13438 | else if (!c_mark_addressable (t)) | |
13439 | remove = true; | |
13440 | break; | |
13441 | ||
13442 | case OMP_CLAUSE_MAP: | |
13443 | case OMP_CLAUSE_TO: | |
13444 | case OMP_CLAUSE_FROM: | |
41dbbb37 | 13445 | case OMP_CLAUSE__CACHE_: |
acf0174b JJ |
13446 | t = OMP_CLAUSE_DECL (c); |
13447 | if (TREE_CODE (t) == TREE_LIST) | |
13448 | { | |
e46c7770 | 13449 | if (handle_omp_array_sections (c, ort)) |
acf0174b JJ |
13450 | remove = true; |
13451 | else | |
13452 | { | |
13453 | t = OMP_CLAUSE_DECL (c); | |
b17a8b07 | 13454 | if (!lang_hooks.types.omp_mappable_type (TREE_TYPE (t))) |
acf0174b JJ |
13455 | { |
13456 | error_at (OMP_CLAUSE_LOCATION (c), | |
13457 | "array section does not have mappable type " | |
13458 | "in %qs clause", | |
13459 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13460 | remove = true; | |
13461 | } | |
9dc5773f JJ |
13462 | else if (TYPE_ATOMIC (TREE_TYPE (t))) |
13463 | { | |
13464 | error_at (OMP_CLAUSE_LOCATION (c), | |
13465 | "%<_Atomic%> %qE in %qs clause", t, | |
13466 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13467 | remove = true; | |
13468 | } | |
d9a6bd32 JJ |
13469 | while (TREE_CODE (t) == ARRAY_REF) |
13470 | t = TREE_OPERAND (t, 0); | |
13471 | if (TREE_CODE (t) == COMPONENT_REF | |
13472 | && TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE) | |
13473 | { | |
13474 | while (TREE_CODE (t) == COMPONENT_REF) | |
13475 | t = TREE_OPERAND (t, 0); | |
13476 | if (bitmap_bit_p (&map_field_head, DECL_UID (t))) | |
13477 | break; | |
13478 | if (bitmap_bit_p (&map_head, DECL_UID (t))) | |
13479 | { | |
13480 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_MAP) | |
13481 | error ("%qD appears more than once in motion" | |
13482 | " clauses", t); | |
e46c7770 CP |
13483 | else if (ort == C_ORT_ACC) |
13484 | error ("%qD appears more than once in data" | |
13485 | " clauses", t); | |
d9a6bd32 JJ |
13486 | else |
13487 | error ("%qD appears more than once in map" | |
13488 | " clauses", t); | |
13489 | remove = true; | |
13490 | } | |
13491 | else | |
13492 | { | |
13493 | bitmap_set_bit (&map_head, DECL_UID (t)); | |
13494 | bitmap_set_bit (&map_field_head, DECL_UID (t)); | |
13495 | } | |
13496 | } | |
acf0174b JJ |
13497 | } |
13498 | break; | |
13499 | } | |
13500 | if (t == error_mark_node) | |
d9a6bd32 JJ |
13501 | { |
13502 | remove = true; | |
13503 | break; | |
13504 | } | |
13505 | if (TREE_CODE (t) == COMPONENT_REF | |
77886428 | 13506 | && (ort & C_ORT_OMP) |
d9a6bd32 JJ |
13507 | && OMP_CLAUSE_CODE (c) != OMP_CLAUSE__CACHE_) |
13508 | { | |
13509 | if (DECL_BIT_FIELD (TREE_OPERAND (t, 1))) | |
13510 | { | |
13511 | error_at (OMP_CLAUSE_LOCATION (c), | |
13512 | "bit-field %qE in %qs clause", | |
13513 | t, omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13514 | remove = true; | |
13515 | } | |
13516 | else if (!lang_hooks.types.omp_mappable_type (TREE_TYPE (t))) | |
13517 | { | |
13518 | error_at (OMP_CLAUSE_LOCATION (c), | |
13519 | "%qE does not have a mappable type in %qs clause", | |
13520 | t, omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13521 | remove = true; | |
13522 | } | |
9dc5773f JJ |
13523 | else if (TYPE_ATOMIC (TREE_TYPE (t))) |
13524 | { | |
13525 | error_at (OMP_CLAUSE_LOCATION (c), | |
13526 | "%<_Atomic%> %qE in %qs clause", t, | |
13527 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13528 | remove = true; | |
13529 | } | |
d9a6bd32 JJ |
13530 | while (TREE_CODE (t) == COMPONENT_REF) |
13531 | { | |
13532 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) | |
13533 | == UNION_TYPE) | |
13534 | { | |
13535 | error_at (OMP_CLAUSE_LOCATION (c), | |
13536 | "%qE is a member of a union", t); | |
13537 | remove = true; | |
13538 | break; | |
13539 | } | |
13540 | t = TREE_OPERAND (t, 0); | |
13541 | } | |
13542 | if (remove) | |
13543 | break; | |
13544 | if (VAR_P (t) || TREE_CODE (t) == PARM_DECL) | |
13545 | { | |
e01d41e5 | 13546 | if (bitmap_bit_p (&map_field_head, DECL_UID (t))) |
d9a6bd32 JJ |
13547 | break; |
13548 | } | |
13549 | } | |
13550 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) | |
acf0174b JJ |
13551 | { |
13552 | error_at (OMP_CLAUSE_LOCATION (c), | |
13553 | "%qE is not a variable in %qs clause", t, | |
13554 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13555 | remove = true; | |
13556 | } | |
0ae9bd27 | 13557 | else if (VAR_P (t) && DECL_THREAD_LOCAL_P (t)) |
acf0174b JJ |
13558 | { |
13559 | error_at (OMP_CLAUSE_LOCATION (c), | |
13560 | "%qD is threadprivate variable in %qs clause", t, | |
13561 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13562 | remove = true; | |
13563 | } | |
e4606348 JJ |
13564 | else if ((OMP_CLAUSE_CODE (c) != OMP_CLAUSE_MAP |
13565 | || (OMP_CLAUSE_MAP_KIND (c) | |
13566 | != GOMP_MAP_FIRSTPRIVATE_POINTER)) | |
13567 | && !c_mark_addressable (t)) | |
acf0174b | 13568 | remove = true; |
b17a8b07 | 13569 | else if (!(OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP |
41dbbb37 | 13570 | && (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_POINTER |
d9a6bd32 JJ |
13571 | || (OMP_CLAUSE_MAP_KIND (c) |
13572 | == GOMP_MAP_FIRSTPRIVATE_POINTER) | |
41dbbb37 TS |
13573 | || (OMP_CLAUSE_MAP_KIND (c) |
13574 | == GOMP_MAP_FORCE_DEVICEPTR))) | |
d9a6bd32 | 13575 | && t == OMP_CLAUSE_DECL (c) |
b17a8b07 | 13576 | && !lang_hooks.types.omp_mappable_type (TREE_TYPE (t))) |
acf0174b JJ |
13577 | { |
13578 | error_at (OMP_CLAUSE_LOCATION (c), | |
13579 | "%qD does not have a mappable type in %qs clause", t, | |
13580 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13581 | remove = true; | |
13582 | } | |
9dc5773f JJ |
13583 | else if (TREE_TYPE (t) == error_mark_node) |
13584 | remove = true; | |
13585 | else if (TYPE_ATOMIC (strip_array_types (TREE_TYPE (t)))) | |
13586 | { | |
13587 | error_at (OMP_CLAUSE_LOCATION (c), | |
13588 | "%<_Atomic%> %qE in %qs clause", t, | |
13589 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13590 | remove = true; | |
13591 | } | |
d9a6bd32 JJ |
13592 | else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP |
13593 | && OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_POINTER) | |
13594 | { | |
13595 | if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
13596 | || bitmap_bit_p (&firstprivate_head, DECL_UID (t))) | |
13597 | { | |
13598 | error ("%qD appears more than once in data clauses", t); | |
13599 | remove = true; | |
13600 | } | |
e01d41e5 | 13601 | else if (bitmap_bit_p (&map_head, DECL_UID (t))) |
d9a6bd32 | 13602 | { |
e46c7770 CP |
13603 | if (ort == C_ORT_ACC) |
13604 | error ("%qD appears more than once in data clauses", t); | |
13605 | else | |
13606 | error ("%qD appears both in data and map clauses", t); | |
e01d41e5 | 13607 | remove = true; |
d9a6bd32 | 13608 | } |
e01d41e5 JJ |
13609 | else |
13610 | bitmap_set_bit (&generic_head, DECL_UID (t)); | |
d9a6bd32 JJ |
13611 | } |
13612 | else if (bitmap_bit_p (&map_head, DECL_UID (t))) | |
acf0174b JJ |
13613 | { |
13614 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_MAP) | |
13615 | error ("%qD appears more than once in motion clauses", t); | |
e46c7770 CP |
13616 | else if (ort == C_ORT_ACC) |
13617 | error ("%qD appears more than once in data clauses", t); | |
acf0174b JJ |
13618 | else |
13619 | error ("%qD appears more than once in map clauses", t); | |
13620 | remove = true; | |
13621 | } | |
e01d41e5 JJ |
13622 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) |
13623 | || bitmap_bit_p (&firstprivate_head, DECL_UID (t))) | |
13624 | { | |
e46c7770 CP |
13625 | if (ort == C_ORT_ACC) |
13626 | error ("%qD appears more than once in data clauses", t); | |
13627 | else | |
13628 | error ("%qD appears both in data and map clauses", t); | |
e01d41e5 JJ |
13629 | remove = true; |
13630 | } | |
acf0174b | 13631 | else |
d9a6bd32 JJ |
13632 | { |
13633 | bitmap_set_bit (&map_head, DECL_UID (t)); | |
13634 | if (t != OMP_CLAUSE_DECL (c) | |
13635 | && TREE_CODE (OMP_CLAUSE_DECL (c)) == COMPONENT_REF) | |
13636 | bitmap_set_bit (&map_field_head, DECL_UID (t)); | |
13637 | } | |
13638 | break; | |
13639 | ||
13640 | case OMP_CLAUSE_TO_DECLARE: | |
d9a6bd32 JJ |
13641 | case OMP_CLAUSE_LINK: |
13642 | t = OMP_CLAUSE_DECL (c); | |
e01d41e5 JJ |
13643 | if (TREE_CODE (t) == FUNCTION_DECL |
13644 | && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_TO_DECLARE) | |
13645 | ; | |
13646 | else if (!VAR_P (t)) | |
d9a6bd32 | 13647 | { |
e01d41e5 JJ |
13648 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_TO_DECLARE) |
13649 | error_at (OMP_CLAUSE_LOCATION (c), | |
13650 | "%qE is neither a variable nor a function name in " | |
13651 | "clause %qs", t, | |
13652 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13653 | else | |
13654 | error_at (OMP_CLAUSE_LOCATION (c), | |
13655 | "%qE is not a variable in clause %qs", t, | |
13656 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
d9a6bd32 JJ |
13657 | remove = true; |
13658 | } | |
13659 | else if (DECL_THREAD_LOCAL_P (t)) | |
13660 | { | |
13661 | error_at (OMP_CLAUSE_LOCATION (c), | |
13662 | "%qD is threadprivate variable in %qs clause", t, | |
13663 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13664 | remove = true; | |
13665 | } | |
13666 | else if (!lang_hooks.types.omp_mappable_type (TREE_TYPE (t))) | |
13667 | { | |
13668 | error_at (OMP_CLAUSE_LOCATION (c), | |
13669 | "%qD does not have a mappable type in %qs clause", t, | |
13670 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13671 | remove = true; | |
13672 | } | |
e01d41e5 JJ |
13673 | if (remove) |
13674 | break; | |
13675 | if (bitmap_bit_p (&generic_head, DECL_UID (t))) | |
13676 | { | |
13677 | error_at (OMP_CLAUSE_LOCATION (c), | |
13678 | "%qE appears more than once on the same " | |
13679 | "%<declare target%> directive", t); | |
13680 | remove = true; | |
13681 | } | |
13682 | else | |
13683 | bitmap_set_bit (&generic_head, DECL_UID (t)); | |
acf0174b JJ |
13684 | break; |
13685 | ||
13686 | case OMP_CLAUSE_UNIFORM: | |
13687 | t = OMP_CLAUSE_DECL (c); | |
13688 | if (TREE_CODE (t) != PARM_DECL) | |
13689 | { | |
13690 | if (DECL_P (t)) | |
13691 | error_at (OMP_CLAUSE_LOCATION (c), | |
13692 | "%qD is not an argument in %<uniform%> clause", t); | |
13693 | else | |
13694 | error_at (OMP_CLAUSE_LOCATION (c), | |
13695 | "%qE is not an argument in %<uniform%> clause", t); | |
13696 | remove = true; | |
ee1d5a02 | 13697 | break; |
acf0174b | 13698 | } |
e01d41e5 JJ |
13699 | /* map_head bitmap is used as uniform_head if declare_simd. */ |
13700 | bitmap_set_bit (&map_head, DECL_UID (t)); | |
ee1d5a02 | 13701 | goto check_dup_generic; |
acf0174b | 13702 | |
d9a6bd32 JJ |
13703 | case OMP_CLAUSE_IS_DEVICE_PTR: |
13704 | case OMP_CLAUSE_USE_DEVICE_PTR: | |
13705 | t = OMP_CLAUSE_DECL (c); | |
13706 | if (TREE_CODE (TREE_TYPE (t)) != POINTER_TYPE | |
13707 | && TREE_CODE (TREE_TYPE (t)) != ARRAY_TYPE) | |
13708 | { | |
13709 | error_at (OMP_CLAUSE_LOCATION (c), | |
13710 | "%qs variable is neither a pointer nor an array", | |
13711 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
13712 | remove = true; | |
13713 | } | |
13714 | goto check_dup_generic; | |
13715 | ||
acf0174b JJ |
13716 | case OMP_CLAUSE_NOWAIT: |
13717 | if (copyprivate_seen) | |
13718 | { | |
13719 | error_at (OMP_CLAUSE_LOCATION (c), | |
13720 | "%<nowait%> clause must not be used together " | |
13721 | "with %<copyprivate%>"); | |
13722 | remove = true; | |
13723 | break; | |
13724 | } | |
13725 | nowait_clause = pc; | |
13726 | pc = &OMP_CLAUSE_CHAIN (c); | |
13727 | continue; | |
13728 | ||
953ff289 DN |
13729 | case OMP_CLAUSE_IF: |
13730 | case OMP_CLAUSE_NUM_THREADS: | |
acf0174b JJ |
13731 | case OMP_CLAUSE_NUM_TEAMS: |
13732 | case OMP_CLAUSE_THREAD_LIMIT: | |
953ff289 | 13733 | case OMP_CLAUSE_DEFAULT: |
a68ab351 JJ |
13734 | case OMP_CLAUSE_UNTIED: |
13735 | case OMP_CLAUSE_COLLAPSE: | |
20906c66 JJ |
13736 | case OMP_CLAUSE_FINAL: |
13737 | case OMP_CLAUSE_MERGEABLE: | |
acf0174b JJ |
13738 | case OMP_CLAUSE_DEVICE: |
13739 | case OMP_CLAUSE_DIST_SCHEDULE: | |
13740 | case OMP_CLAUSE_PARALLEL: | |
13741 | case OMP_CLAUSE_FOR: | |
13742 | case OMP_CLAUSE_SECTIONS: | |
13743 | case OMP_CLAUSE_TASKGROUP: | |
13744 | case OMP_CLAUSE_PROC_BIND: | |
d9a6bd32 JJ |
13745 | case OMP_CLAUSE_PRIORITY: |
13746 | case OMP_CLAUSE_GRAINSIZE: | |
13747 | case OMP_CLAUSE_NUM_TASKS: | |
13748 | case OMP_CLAUSE_NOGROUP: | |
13749 | case OMP_CLAUSE_THREADS: | |
13750 | case OMP_CLAUSE_SIMD: | |
13751 | case OMP_CLAUSE_HINT: | |
13752 | case OMP_CLAUSE_DEFAULTMAP: | |
41dbbb37 TS |
13753 | case OMP_CLAUSE_NUM_GANGS: |
13754 | case OMP_CLAUSE_NUM_WORKERS: | |
13755 | case OMP_CLAUSE_VECTOR_LENGTH: | |
13756 | case OMP_CLAUSE_ASYNC: | |
13757 | case OMP_CLAUSE_WAIT: | |
13758 | case OMP_CLAUSE_AUTO: | |
7a5e4956 | 13759 | case OMP_CLAUSE_INDEPENDENT: |
41dbbb37 TS |
13760 | case OMP_CLAUSE_SEQ: |
13761 | case OMP_CLAUSE_GANG: | |
13762 | case OMP_CLAUSE_WORKER: | |
13763 | case OMP_CLAUSE_VECTOR: | |
7a5e4956 | 13764 | case OMP_CLAUSE_TILE: |
acf0174b JJ |
13765 | pc = &OMP_CLAUSE_CHAIN (c); |
13766 | continue; | |
13767 | ||
e01d41e5 JJ |
13768 | case OMP_CLAUSE_SCHEDULE: |
13769 | if (OMP_CLAUSE_SCHEDULE_KIND (c) & OMP_CLAUSE_SCHEDULE_NONMONOTONIC) | |
13770 | { | |
13771 | const char *p = NULL; | |
13772 | switch (OMP_CLAUSE_SCHEDULE_KIND (c) & OMP_CLAUSE_SCHEDULE_MASK) | |
13773 | { | |
13774 | case OMP_CLAUSE_SCHEDULE_STATIC: p = "static"; break; | |
13775 | case OMP_CLAUSE_SCHEDULE_DYNAMIC: break; | |
13776 | case OMP_CLAUSE_SCHEDULE_GUIDED: break; | |
13777 | case OMP_CLAUSE_SCHEDULE_AUTO: p = "auto"; break; | |
13778 | case OMP_CLAUSE_SCHEDULE_RUNTIME: p = "runtime"; break; | |
13779 | default: gcc_unreachable (); | |
13780 | } | |
13781 | if (p) | |
13782 | { | |
13783 | error_at (OMP_CLAUSE_LOCATION (c), | |
13784 | "%<nonmonotonic%> modifier specified for %qs " | |
13785 | "schedule kind", p); | |
13786 | OMP_CLAUSE_SCHEDULE_KIND (c) | |
13787 | = (enum omp_clause_schedule_kind) | |
13788 | (OMP_CLAUSE_SCHEDULE_KIND (c) | |
13789 | & ~OMP_CLAUSE_SCHEDULE_NONMONOTONIC); | |
13790 | } | |
13791 | } | |
13792 | schedule_clause = c; | |
13793 | pc = &OMP_CLAUSE_CHAIN (c); | |
13794 | continue; | |
13795 | ||
13796 | case OMP_CLAUSE_ORDERED: | |
13797 | ordered_seen = true; | |
13798 | pc = &OMP_CLAUSE_CHAIN (c); | |
13799 | continue; | |
13800 | ||
d9a6bd32 JJ |
13801 | case OMP_CLAUSE_SAFELEN: |
13802 | safelen = c; | |
13803 | pc = &OMP_CLAUSE_CHAIN (c); | |
13804 | continue; | |
13805 | case OMP_CLAUSE_SIMDLEN: | |
13806 | simdlen = c; | |
13807 | pc = &OMP_CLAUSE_CHAIN (c); | |
13808 | continue; | |
13809 | ||
acf0174b JJ |
13810 | case OMP_CLAUSE_INBRANCH: |
13811 | case OMP_CLAUSE_NOTINBRANCH: | |
13812 | if (branch_seen) | |
13813 | { | |
13814 | error_at (OMP_CLAUSE_LOCATION (c), | |
13815 | "%<inbranch%> clause is incompatible with " | |
13816 | "%<notinbranch%>"); | |
13817 | remove = true; | |
13818 | break; | |
13819 | } | |
13820 | branch_seen = true; | |
953ff289 DN |
13821 | pc = &OMP_CLAUSE_CHAIN (c); |
13822 | continue; | |
13823 | ||
13824 | default: | |
13825 | gcc_unreachable (); | |
13826 | } | |
13827 | ||
13828 | if (!remove) | |
13829 | { | |
13830 | t = OMP_CLAUSE_DECL (c); | |
13831 | ||
13832 | if (need_complete) | |
13833 | { | |
4f2e1536 | 13834 | t = require_complete_type (OMP_CLAUSE_LOCATION (c), t); |
953ff289 DN |
13835 | if (t == error_mark_node) |
13836 | remove = true; | |
13837 | } | |
13838 | ||
13839 | if (need_implicitly_determined) | |
13840 | { | |
13841 | const char *share_name = NULL; | |
13842 | ||
0ae9bd27 | 13843 | if (VAR_P (t) && DECL_THREAD_LOCAL_P (t)) |
953ff289 DN |
13844 | share_name = "threadprivate"; |
13845 | else switch (c_omp_predetermined_sharing (t)) | |
13846 | { | |
13847 | case OMP_CLAUSE_DEFAULT_UNSPECIFIED: | |
13848 | break; | |
13849 | case OMP_CLAUSE_DEFAULT_SHARED: | |
20906c66 JJ |
13850 | /* const vars may be specified in firstprivate clause. */ |
13851 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE | |
13852 | && TREE_READONLY (t)) | |
13853 | break; | |
953ff289 DN |
13854 | share_name = "shared"; |
13855 | break; | |
13856 | case OMP_CLAUSE_DEFAULT_PRIVATE: | |
13857 | share_name = "private"; | |
13858 | break; | |
13859 | default: | |
13860 | gcc_unreachable (); | |
13861 | } | |
13862 | if (share_name) | |
13863 | { | |
c2255bc4 AH |
13864 | error_at (OMP_CLAUSE_LOCATION (c), |
13865 | "%qE is predetermined %qs for %qs", | |
acf0174b JJ |
13866 | t, share_name, |
13867 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
953ff289 DN |
13868 | remove = true; |
13869 | } | |
13870 | } | |
13871 | } | |
13872 | ||
13873 | if (remove) | |
13874 | *pc = OMP_CLAUSE_CHAIN (c); | |
13875 | else | |
13876 | pc = &OMP_CLAUSE_CHAIN (c); | |
13877 | } | |
13878 | ||
d9a6bd32 JJ |
13879 | if (simdlen |
13880 | && safelen | |
13881 | && tree_int_cst_lt (OMP_CLAUSE_SAFELEN_EXPR (safelen), | |
13882 | OMP_CLAUSE_SIMDLEN_EXPR (simdlen))) | |
13883 | { | |
13884 | error_at (OMP_CLAUSE_LOCATION (simdlen), | |
13885 | "%<simdlen%> clause value is bigger than " | |
13886 | "%<safelen%> clause value"); | |
13887 | OMP_CLAUSE_SIMDLEN_EXPR (simdlen) | |
13888 | = OMP_CLAUSE_SAFELEN_EXPR (safelen); | |
13889 | } | |
13890 | ||
e01d41e5 JJ |
13891 | if (ordered_seen |
13892 | && schedule_clause | |
13893 | && (OMP_CLAUSE_SCHEDULE_KIND (schedule_clause) | |
13894 | & OMP_CLAUSE_SCHEDULE_NONMONOTONIC)) | |
13895 | { | |
13896 | error_at (OMP_CLAUSE_LOCATION (schedule_clause), | |
13897 | "%<nonmonotonic%> schedule modifier specified together " | |
13898 | "with %<ordered%> clause"); | |
13899 | OMP_CLAUSE_SCHEDULE_KIND (schedule_clause) | |
13900 | = (enum omp_clause_schedule_kind) | |
13901 | (OMP_CLAUSE_SCHEDULE_KIND (schedule_clause) | |
13902 | & ~OMP_CLAUSE_SCHEDULE_NONMONOTONIC); | |
13903 | } | |
13904 | ||
13905 | if (linear_variable_step_check) | |
13906 | for (pc = &clauses, c = clauses; c ; c = *pc) | |
13907 | { | |
13908 | bool remove = false; | |
13909 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR | |
13910 | && OMP_CLAUSE_LINEAR_VARIABLE_STRIDE (c) | |
13911 | && !bitmap_bit_p (&map_head, | |
13912 | DECL_UID (OMP_CLAUSE_LINEAR_STEP (c)))) | |
13913 | { | |
13914 | error_at (OMP_CLAUSE_LOCATION (c), | |
13915 | "%<linear%> clause step is a parameter %qD not " | |
13916 | "specified in %<uniform%> clause", | |
13917 | OMP_CLAUSE_LINEAR_STEP (c)); | |
13918 | remove = true; | |
13919 | } | |
13920 | ||
13921 | if (remove) | |
13922 | *pc = OMP_CLAUSE_CHAIN (c); | |
13923 | else | |
13924 | pc = &OMP_CLAUSE_CHAIN (c); | |
13925 | } | |
13926 | ||
953ff289 DN |
13927 | bitmap_obstack_release (NULL); |
13928 | return clauses; | |
13929 | } | |
9ae165a0 | 13930 | |
9dc5773f JJ |
13931 | /* Return code to initialize DST with a copy constructor from SRC. |
13932 | C doesn't have copy constructors nor assignment operators, only for | |
13933 | _Atomic vars we need to perform __atomic_load from src into a temporary | |
13934 | followed by __atomic_store of the temporary to dst. */ | |
13935 | ||
13936 | tree | |
13937 | c_omp_clause_copy_ctor (tree clause, tree dst, tree src) | |
13938 | { | |
13939 | if (!really_atomic_lvalue (dst) && !really_atomic_lvalue (src)) | |
13940 | return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src); | |
13941 | ||
13942 | location_t loc = OMP_CLAUSE_LOCATION (clause); | |
13943 | tree type = TREE_TYPE (dst); | |
13944 | tree nonatomic_type = build_qualified_type (type, TYPE_UNQUALIFIED); | |
13945 | tree tmp = create_tmp_var (nonatomic_type); | |
13946 | tree tmp_addr = build_fold_addr_expr (tmp); | |
13947 | TREE_ADDRESSABLE (tmp) = 1; | |
13948 | TREE_NO_WARNING (tmp) = 1; | |
13949 | tree src_addr = build_fold_addr_expr (src); | |
13950 | tree dst_addr = build_fold_addr_expr (dst); | |
13951 | tree seq_cst = build_int_cst (integer_type_node, MEMMODEL_SEQ_CST); | |
13952 | vec<tree, va_gc> *params; | |
13953 | /* Expansion of a generic atomic load may require an addition | |
13954 | element, so allocate enough to prevent a resize. */ | |
13955 | vec_alloc (params, 4); | |
13956 | ||
13957 | /* Build __atomic_load (&src, &tmp, SEQ_CST); */ | |
13958 | tree fndecl = builtin_decl_explicit (BUILT_IN_ATOMIC_LOAD); | |
13959 | params->quick_push (src_addr); | |
13960 | params->quick_push (tmp_addr); | |
13961 | params->quick_push (seq_cst); | |
13962 | tree load = c_build_function_call_vec (loc, vNULL, fndecl, params, NULL); | |
13963 | ||
13964 | vec_alloc (params, 4); | |
13965 | ||
13966 | /* Build __atomic_store (&dst, &tmp, SEQ_CST); */ | |
13967 | fndecl = builtin_decl_explicit (BUILT_IN_ATOMIC_STORE); | |
13968 | params->quick_push (dst_addr); | |
13969 | params->quick_push (tmp_addr); | |
13970 | params->quick_push (seq_cst); | |
13971 | tree store = c_build_function_call_vec (loc, vNULL, fndecl, params, NULL); | |
13972 | return build2 (COMPOUND_EXPR, void_type_node, load, store); | |
13973 | } | |
13974 | ||
0a35513e AH |
13975 | /* Create a transaction node. */ |
13976 | ||
13977 | tree | |
13978 | c_finish_transaction (location_t loc, tree block, int flags) | |
13979 | { | |
13980 | tree stmt = build_stmt (loc, TRANSACTION_EXPR, block); | |
13981 | if (flags & TM_STMT_ATTR_OUTER) | |
13982 | TRANSACTION_EXPR_OUTER (stmt) = 1; | |
13983 | if (flags & TM_STMT_ATTR_RELAXED) | |
13984 | TRANSACTION_EXPR_RELAXED (stmt) = 1; | |
13985 | return add_stmt (stmt); | |
13986 | } | |
13987 | ||
9ae165a0 | 13988 | /* Make a variant type in the proper way for C/C++, propagating qualifiers |
e9e32ee6 JM |
13989 | down to the element type of an array. If ORIG_QUAL_TYPE is not |
13990 | NULL, then it should be used as the qualified type | |
13991 | ORIG_QUAL_INDIRECT levels down in array type derivation (to | |
13992 | preserve information about the typedef name from which an array | |
13993 | type was derived). */ | |
9ae165a0 DG |
13994 | |
13995 | tree | |
e9e32ee6 JM |
13996 | c_build_qualified_type (tree type, int type_quals, tree orig_qual_type, |
13997 | size_t orig_qual_indirect) | |
9ae165a0 DG |
13998 | { |
13999 | if (type == error_mark_node) | |
14000 | return type; | |
14001 | ||
14002 | if (TREE_CODE (type) == ARRAY_TYPE) | |
14003 | { | |
14004 | tree t; | |
14005 | tree element_type = c_build_qualified_type (TREE_TYPE (type), | |
e9e32ee6 JM |
14006 | type_quals, orig_qual_type, |
14007 | orig_qual_indirect - 1); | |
9ae165a0 DG |
14008 | |
14009 | /* See if we already have an identically qualified type. */ | |
e9e32ee6 JM |
14010 | if (orig_qual_type && orig_qual_indirect == 0) |
14011 | t = orig_qual_type; | |
14012 | else | |
14013 | for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) | |
14014 | { | |
14015 | if (TYPE_QUALS (strip_array_types (t)) == type_quals | |
14016 | && TYPE_NAME (t) == TYPE_NAME (type) | |
14017 | && TYPE_CONTEXT (t) == TYPE_CONTEXT (type) | |
14018 | && attribute_list_equal (TYPE_ATTRIBUTES (t), | |
14019 | TYPE_ATTRIBUTES (type))) | |
14020 | break; | |
14021 | } | |
9ae165a0 DG |
14022 | if (!t) |
14023 | { | |
14024 | tree domain = TYPE_DOMAIN (type); | |
14025 | ||
14026 | t = build_variant_type_copy (type); | |
14027 | TREE_TYPE (t) = element_type; | |
14028 | ||
14029 | if (TYPE_STRUCTURAL_EQUALITY_P (element_type) | |
14030 | || (domain && TYPE_STRUCTURAL_EQUALITY_P (domain))) | |
14031 | SET_TYPE_STRUCTURAL_EQUALITY (t); | |
14032 | else if (TYPE_CANONICAL (element_type) != element_type | |
14033 | || (domain && TYPE_CANONICAL (domain) != domain)) | |
14034 | { | |
b8698a0f | 14035 | tree unqualified_canon |
9ae165a0 | 14036 | = build_array_type (TYPE_CANONICAL (element_type), |
b8698a0f | 14037 | domain? TYPE_CANONICAL (domain) |
9ae165a0 | 14038 | : NULL_TREE); |
ee45a32d EB |
14039 | if (TYPE_REVERSE_STORAGE_ORDER (type)) |
14040 | { | |
14041 | unqualified_canon | |
14042 | = build_distinct_type_copy (unqualified_canon); | |
14043 | TYPE_REVERSE_STORAGE_ORDER (unqualified_canon) = 1; | |
14044 | } | |
b8698a0f | 14045 | TYPE_CANONICAL (t) |
9ae165a0 DG |
14046 | = c_build_qualified_type (unqualified_canon, type_quals); |
14047 | } | |
14048 | else | |
14049 | TYPE_CANONICAL (t) = t; | |
14050 | } | |
14051 | return t; | |
14052 | } | |
14053 | ||
14054 | /* A restrict-qualified pointer type must be a pointer to object or | |
14055 | incomplete type. Note that the use of POINTER_TYPE_P also allows | |
14056 | REFERENCE_TYPEs, which is appropriate for C++. */ | |
14057 | if ((type_quals & TYPE_QUAL_RESTRICT) | |
14058 | && (!POINTER_TYPE_P (type) | |
14059 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type)))) | |
14060 | { | |
14061 | error ("invalid use of %<restrict%>"); | |
14062 | type_quals &= ~TYPE_QUAL_RESTRICT; | |
14063 | } | |
14064 | ||
e9e32ee6 JM |
14065 | tree var_type = (orig_qual_type && orig_qual_indirect == 0 |
14066 | ? orig_qual_type | |
14067 | : build_qualified_type (type, type_quals)); | |
e922069e JW |
14068 | /* A variant type does not inherit the list of incomplete vars from the |
14069 | type main variant. */ | |
152ef731 JJ |
14070 | if (RECORD_OR_UNION_TYPE_P (var_type) |
14071 | && TYPE_MAIN_VARIANT (var_type) != var_type) | |
e922069e JW |
14072 | C_TYPE_INCOMPLETE_VARS (var_type) = 0; |
14073 | return var_type; | |
9ae165a0 | 14074 | } |
72b5577d ILT |
14075 | |
14076 | /* Build a VA_ARG_EXPR for the C parser. */ | |
14077 | ||
14078 | tree | |
f187980b | 14079 | c_build_va_arg (location_t loc1, tree expr, location_t loc2, tree type) |
72b5577d | 14080 | { |
ec3fba51 MP |
14081 | if (error_operand_p (type)) |
14082 | return error_mark_node; | |
f187980b EB |
14083 | /* VA_ARG_EXPR cannot be used for a scalar va_list with reverse storage |
14084 | order because it takes the address of the expression. */ | |
14085 | else if (handled_component_p (expr) | |
14086 | && reverse_storage_order_for_component_p (expr)) | |
14087 | { | |
14088 | error_at (loc1, "cannot use %<va_arg%> with reverse storage order"); | |
14089 | return error_mark_node; | |
14090 | } | |
ec3fba51 | 14091 | else if (!COMPLETE_TYPE_P (type)) |
4e81b788 | 14092 | { |
f187980b | 14093 | error_at (loc2, "second argument to %<va_arg%> is of incomplete " |
ec3fba51 | 14094 | "type %qT", type); |
4e81b788 MP |
14095 | return error_mark_node; |
14096 | } | |
ec3fba51 | 14097 | else if (warn_cxx_compat && TREE_CODE (type) == ENUMERAL_TYPE) |
f187980b | 14098 | warning_at (loc2, OPT_Wc___compat, |
ec3fba51 | 14099 | "C++ requires promoted type, not enum type, in %<va_arg%>"); |
f187980b | 14100 | return build_va_arg (loc2, expr, type); |
72b5577d | 14101 | } |
acf0174b JJ |
14102 | |
14103 | /* Return truthvalue of whether T1 is the same tree structure as T2. | |
6574d78e | 14104 | Return 1 if they are the same. Return false if they are different. */ |
acf0174b JJ |
14105 | |
14106 | bool | |
14107 | c_tree_equal (tree t1, tree t2) | |
14108 | { | |
14109 | enum tree_code code1, code2; | |
14110 | ||
14111 | if (t1 == t2) | |
14112 | return true; | |
14113 | if (!t1 || !t2) | |
14114 | return false; | |
14115 | ||
14116 | for (code1 = TREE_CODE (t1); | |
14117 | CONVERT_EXPR_CODE_P (code1) | |
14118 | || code1 == NON_LVALUE_EXPR; | |
14119 | code1 = TREE_CODE (t1)) | |
14120 | t1 = TREE_OPERAND (t1, 0); | |
14121 | for (code2 = TREE_CODE (t2); | |
14122 | CONVERT_EXPR_CODE_P (code2) | |
14123 | || code2 == NON_LVALUE_EXPR; | |
14124 | code2 = TREE_CODE (t2)) | |
14125 | t2 = TREE_OPERAND (t2, 0); | |
14126 | ||
14127 | /* They might have become equal now. */ | |
14128 | if (t1 == t2) | |
14129 | return true; | |
14130 | ||
14131 | if (code1 != code2) | |
14132 | return false; | |
14133 | ||
14134 | switch (code1) | |
14135 | { | |
14136 | case INTEGER_CST: | |
8e6cdc90 | 14137 | return wi::to_wide (t1) == wi::to_wide (t2); |
acf0174b JJ |
14138 | |
14139 | case REAL_CST: | |
624d31fe | 14140 | return real_equal (&TREE_REAL_CST (t1), &TREE_REAL_CST (t2)); |
acf0174b JJ |
14141 | |
14142 | case STRING_CST: | |
14143 | return TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2) | |
14144 | && !memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2), | |
14145 | TREE_STRING_LENGTH (t1)); | |
14146 | ||
14147 | case FIXED_CST: | |
14148 | return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1), | |
14149 | TREE_FIXED_CST (t2)); | |
14150 | ||
14151 | case COMPLEX_CST: | |
14152 | return c_tree_equal (TREE_REALPART (t1), TREE_REALPART (t2)) | |
14153 | && c_tree_equal (TREE_IMAGPART (t1), TREE_IMAGPART (t2)); | |
14154 | ||
14155 | case VECTOR_CST: | |
14156 | return operand_equal_p (t1, t2, OEP_ONLY_CONST); | |
14157 | ||
14158 | case CONSTRUCTOR: | |
14159 | /* We need to do this when determining whether or not two | |
14160 | non-type pointer to member function template arguments | |
14161 | are the same. */ | |
14162 | if (!comptypes (TREE_TYPE (t1), TREE_TYPE (t2)) | |
14163 | || CONSTRUCTOR_NELTS (t1) != CONSTRUCTOR_NELTS (t2)) | |
14164 | return false; | |
14165 | { | |
14166 | tree field, value; | |
14167 | unsigned int i; | |
14168 | FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t1), i, field, value) | |
14169 | { | |
14170 | constructor_elt *elt2 = CONSTRUCTOR_ELT (t2, i); | |
14171 | if (!c_tree_equal (field, elt2->index) | |
14172 | || !c_tree_equal (value, elt2->value)) | |
14173 | return false; | |
14174 | } | |
14175 | } | |
14176 | return true; | |
14177 | ||
14178 | case TREE_LIST: | |
14179 | if (!c_tree_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2))) | |
14180 | return false; | |
14181 | if (!c_tree_equal (TREE_VALUE (t1), TREE_VALUE (t2))) | |
14182 | return false; | |
14183 | return c_tree_equal (TREE_CHAIN (t1), TREE_CHAIN (t2)); | |
14184 | ||
14185 | case SAVE_EXPR: | |
14186 | return c_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); | |
14187 | ||
14188 | case CALL_EXPR: | |
14189 | { | |
14190 | tree arg1, arg2; | |
14191 | call_expr_arg_iterator iter1, iter2; | |
14192 | if (!c_tree_equal (CALL_EXPR_FN (t1), CALL_EXPR_FN (t2))) | |
14193 | return false; | |
14194 | for (arg1 = first_call_expr_arg (t1, &iter1), | |
14195 | arg2 = first_call_expr_arg (t2, &iter2); | |
14196 | arg1 && arg2; | |
14197 | arg1 = next_call_expr_arg (&iter1), | |
14198 | arg2 = next_call_expr_arg (&iter2)) | |
14199 | if (!c_tree_equal (arg1, arg2)) | |
14200 | return false; | |
14201 | if (arg1 || arg2) | |
14202 | return false; | |
14203 | return true; | |
14204 | } | |
14205 | ||
14206 | case TARGET_EXPR: | |
14207 | { | |
14208 | tree o1 = TREE_OPERAND (t1, 0); | |
14209 | tree o2 = TREE_OPERAND (t2, 0); | |
14210 | ||
14211 | /* Special case: if either target is an unallocated VAR_DECL, | |
14212 | it means that it's going to be unified with whatever the | |
14213 | TARGET_EXPR is really supposed to initialize, so treat it | |
14214 | as being equivalent to anything. */ | |
0ae9bd27 | 14215 | if (VAR_P (o1) && DECL_NAME (o1) == NULL_TREE |
acf0174b JJ |
14216 | && !DECL_RTL_SET_P (o1)) |
14217 | /*Nop*/; | |
0ae9bd27 | 14218 | else if (VAR_P (o2) && DECL_NAME (o2) == NULL_TREE |
acf0174b JJ |
14219 | && !DECL_RTL_SET_P (o2)) |
14220 | /*Nop*/; | |
14221 | else if (!c_tree_equal (o1, o2)) | |
14222 | return false; | |
14223 | ||
14224 | return c_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)); | |
14225 | } | |
14226 | ||
14227 | case COMPONENT_REF: | |
14228 | if (TREE_OPERAND (t1, 1) != TREE_OPERAND (t2, 1)) | |
14229 | return false; | |
14230 | return c_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); | |
14231 | ||
14232 | case PARM_DECL: | |
14233 | case VAR_DECL: | |
14234 | case CONST_DECL: | |
14235 | case FIELD_DECL: | |
14236 | case FUNCTION_DECL: | |
14237 | case IDENTIFIER_NODE: | |
14238 | case SSA_NAME: | |
14239 | return false; | |
14240 | ||
14241 | case TREE_VEC: | |
14242 | { | |
14243 | unsigned ix; | |
14244 | if (TREE_VEC_LENGTH (t1) != TREE_VEC_LENGTH (t2)) | |
14245 | return false; | |
14246 | for (ix = TREE_VEC_LENGTH (t1); ix--;) | |
14247 | if (!c_tree_equal (TREE_VEC_ELT (t1, ix), | |
14248 | TREE_VEC_ELT (t2, ix))) | |
14249 | return false; | |
14250 | return true; | |
14251 | } | |
14252 | ||
14253 | default: | |
14254 | break; | |
14255 | } | |
14256 | ||
14257 | switch (TREE_CODE_CLASS (code1)) | |
14258 | { | |
14259 | case tcc_unary: | |
14260 | case tcc_binary: | |
14261 | case tcc_comparison: | |
14262 | case tcc_expression: | |
14263 | case tcc_vl_exp: | |
14264 | case tcc_reference: | |
14265 | case tcc_statement: | |
14266 | { | |
14267 | int i, n = TREE_OPERAND_LENGTH (t1); | |
14268 | ||
14269 | switch (code1) | |
14270 | { | |
14271 | case PREINCREMENT_EXPR: | |
14272 | case PREDECREMENT_EXPR: | |
14273 | case POSTINCREMENT_EXPR: | |
14274 | case POSTDECREMENT_EXPR: | |
14275 | n = 1; | |
14276 | break; | |
14277 | case ARRAY_REF: | |
14278 | n = 2; | |
14279 | break; | |
14280 | default: | |
14281 | break; | |
14282 | } | |
14283 | ||
14284 | if (TREE_CODE_CLASS (code1) == tcc_vl_exp | |
14285 | && n != TREE_OPERAND_LENGTH (t2)) | |
14286 | return false; | |
14287 | ||
14288 | for (i = 0; i < n; ++i) | |
14289 | if (!c_tree_equal (TREE_OPERAND (t1, i), TREE_OPERAND (t2, i))) | |
14290 | return false; | |
14291 | ||
14292 | return true; | |
14293 | } | |
14294 | ||
14295 | case tcc_type: | |
14296 | return comptypes (t1, t2); | |
14297 | default: | |
14298 | gcc_unreachable (); | |
14299 | } | |
14300 | /* We can get here with --disable-checking. */ | |
14301 | return false; | |
14302 | } | |
12893402 | 14303 | |
1807ffc1 MS |
14304 | /* Returns true when the function declaration FNDECL is implicit, |
14305 | introduced as a result of a call to an otherwise undeclared | |
14306 | function, and false otherwise. */ | |
14307 | ||
14308 | bool | |
14309 | c_decl_implicit (const_tree fndecl) | |
14310 | { | |
14311 | return C_DECL_IMPLICIT (fndecl); | |
14312 | } |