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8d08fdba | 1 | /* Language-dependent node constructors for parse phase of GNU compiler. |
d1e082c2 | 2 | Copyright (C) 1987-2013 Free Software Foundation, Inc. |
8d08fdba MS |
3 | Hacked by Michael Tiemann (tiemann@cygnus.com) |
4 | ||
f5adbb8d | 5 | This file is part of GCC. |
8d08fdba | 6 | |
f5adbb8d | 7 | GCC is free software; you can redistribute it and/or modify |
8d08fdba | 8 | it under the terms of the GNU General Public License as published by |
e77f031d | 9 | the Free Software Foundation; either version 3, or (at your option) |
8d08fdba MS |
10 | any later version. |
11 | ||
f5adbb8d | 12 | GCC is distributed in the hope that it will be useful, |
8d08fdba MS |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
e77f031d NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
8d08fdba MS |
20 | |
21 | #include "config.h" | |
8d052bc7 | 22 | #include "system.h" |
4977bab6 ZW |
23 | #include "coretypes.h" |
24 | #include "tm.h" | |
8d08fdba MS |
25 | #include "tree.h" |
26 | #include "cp-tree.h" | |
27 | #include "flags.h" | |
25af8512 | 28 | #include "tree-inline.h" |
e58a9aa1 | 29 | #include "debug.h" |
41990f96 | 30 | #include "convert.h" |
87501227 | 31 | #include "cgraph.h" |
245763e3 | 32 | #include "splay-tree.h" |
6662d794 | 33 | #include "gimple.h" /* gimple_has_body_p */ |
703c8606 | 34 | #include "hash-table.h" |
12027a89 | 35 | |
b57b79f7 NN |
36 | static tree bot_manip (tree *, int *, void *); |
37 | static tree bot_replace (tree *, int *, void *); | |
b57b79f7 NN |
38 | static int list_hash_eq (const void *, const void *); |
39 | static hashval_t list_hash_pieces (tree, tree, tree); | |
40 | static hashval_t list_hash (const void *); | |
574cfaa4 | 41 | static tree build_target_expr (tree, tree, tsubst_flags_t); |
b57b79f7 NN |
42 | static tree count_trees_r (tree *, int *, void *); |
43 | static tree verify_stmt_tree_r (tree *, int *, void *); | |
a6f86b51 | 44 | static tree build_local_temp (tree); |
b57b79f7 NN |
45 | |
46 | static tree handle_java_interface_attribute (tree *, tree, tree, int, bool *); | |
47 | static tree handle_com_interface_attribute (tree *, tree, tree, int, bool *); | |
48 | static tree handle_init_priority_attribute (tree *, tree, tree, int, bool *); | |
7dbb85a7 | 49 | static tree handle_abi_tag_attribute (tree *, tree, tree, int, bool *); |
91d231cb | 50 | |
27b8d0cd | 51 | /* If REF is an lvalue, returns the kind of lvalue that REF is. |
df5c89cb | 52 | Otherwise, returns clk_none. */ |
8d08fdba | 53 | |
4e9ca9b0 JM |
54 | cp_lvalue_kind |
55 | lvalue_kind (const_tree ref) | |
8ccc31eb | 56 | { |
27b8d0cd MM |
57 | cp_lvalue_kind op1_lvalue_kind = clk_none; |
58 | cp_lvalue_kind op2_lvalue_kind = clk_none; | |
59 | ||
8af2fec4 RY |
60 | /* Expressions of reference type are sometimes wrapped in |
61 | INDIRECT_REFs. INDIRECT_REFs are just internal compiler | |
62 | representation, not part of the language, so we have to look | |
63 | through them. */ | |
31e292c7 | 64 | if (REFERENCE_REF_P (ref)) |
4e9ca9b0 | 65 | return lvalue_kind (TREE_OPERAND (ref, 0)); |
8af2fec4 | 66 | |
8810610e JJ |
67 | if (TREE_TYPE (ref) |
68 | && TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE) | |
8af2fec4 RY |
69 | { |
70 | /* unnamed rvalue references are rvalues */ | |
71 | if (TYPE_REF_IS_RVALUE (TREE_TYPE (ref)) | |
72 | && TREE_CODE (ref) != PARM_DECL | |
5a6ccc94 | 73 | && !VAR_P (ref) |
b24290fb JM |
74 | && TREE_CODE (ref) != COMPONENT_REF |
75 | /* Functions are always lvalues. */ | |
76 | && TREE_CODE (TREE_TYPE (TREE_TYPE (ref))) != FUNCTION_TYPE) | |
df5c89cb | 77 | return clk_rvalueref; |
8af2fec4 | 78 | |
d732e98f | 79 | /* lvalue references and named rvalue references are lvalues. */ |
8af2fec4 RY |
80 | return clk_ordinary; |
81 | } | |
8ccc31eb | 82 | |
394fd776 | 83 | if (ref == current_class_ptr) |
27b8d0cd | 84 | return clk_none; |
8ccc31eb MS |
85 | |
86 | switch (TREE_CODE (ref)) | |
87 | { | |
8f4361eb AP |
88 | case SAVE_EXPR: |
89 | return clk_none; | |
8ccc31eb | 90 | /* preincrements and predecrements are valid lvals, provided |
e92cc029 | 91 | what they refer to are valid lvals. */ |
8ccc31eb MS |
92 | case PREINCREMENT_EXPR: |
93 | case PREDECREMENT_EXPR: | |
c7ae64f2 JM |
94 | case TRY_CATCH_EXPR: |
95 | case WITH_CLEANUP_EXPR: | |
69851283 MM |
96 | case REALPART_EXPR: |
97 | case IMAGPART_EXPR: | |
4e9ca9b0 | 98 | return lvalue_kind (TREE_OPERAND (ref, 0)); |
8ccc31eb | 99 | |
27b8d0cd | 100 | case COMPONENT_REF: |
4e9ca9b0 | 101 | op1_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 0)); |
c8b2e872 | 102 | /* Look at the member designator. */ |
4af9e878 | 103 | if (!op1_lvalue_kind) |
0cbd7506 | 104 | ; |
4af9e878 JM |
105 | else if (is_overloaded_fn (TREE_OPERAND (ref, 1))) |
106 | /* The "field" can be a FUNCTION_DECL or an OVERLOAD in some | |
b7da27c2 JM |
107 | situations. If we're seeing a COMPONENT_REF, it's a non-static |
108 | member, so it isn't an lvalue. */ | |
109 | op1_lvalue_kind = clk_none; | |
110 | else if (TREE_CODE (TREE_OPERAND (ref, 1)) != FIELD_DECL) | |
111 | /* This can be IDENTIFIER_NODE in a template. */; | |
e0d1297c | 112 | else if (DECL_C_BIT_FIELD (TREE_OPERAND (ref, 1))) |
27b8d0cd MM |
113 | { |
114 | /* Clear the ordinary bit. If this object was a class | |
115 | rvalue we want to preserve that information. */ | |
116 | op1_lvalue_kind &= ~clk_ordinary; | |
cd0be382 | 117 | /* The lvalue is for a bitfield. */ |
27b8d0cd MM |
118 | op1_lvalue_kind |= clk_bitfield; |
119 | } | |
e0d1297c NS |
120 | else if (DECL_PACKED (TREE_OPERAND (ref, 1))) |
121 | op1_lvalue_kind |= clk_packed; | |
9f63daea | 122 | |
27b8d0cd MM |
123 | return op1_lvalue_kind; |
124 | ||
8ccc31eb | 125 | case STRING_CST: |
266b4890 | 126 | case COMPOUND_LITERAL_EXPR: |
27b8d0cd | 127 | return clk_ordinary; |
8ccc31eb | 128 | |
e58a9aa1 | 129 | case CONST_DECL: |
4b8c1a92 JJ |
130 | /* CONST_DECL without TREE_STATIC are enumeration values and |
131 | thus not lvalues. With TREE_STATIC they are used by ObjC++ | |
132 | in objc_build_string_object and need to be considered as | |
133 | lvalues. */ | |
134 | if (! TREE_STATIC (ref)) | |
135 | return clk_none; | |
8ccc31eb MS |
136 | case VAR_DECL: |
137 | if (TREE_READONLY (ref) && ! TREE_STATIC (ref) | |
138 | && DECL_LANG_SPECIFIC (ref) | |
139 | && DECL_IN_AGGR_P (ref)) | |
27b8d0cd | 140 | return clk_none; |
8ccc31eb | 141 | case INDIRECT_REF: |
e87b4dde | 142 | case ARROW_EXPR: |
8ccc31eb MS |
143 | case ARRAY_REF: |
144 | case PARM_DECL: | |
145 | case RESULT_DECL: | |
ea48c8a0 | 146 | return clk_ordinary; |
8ccc31eb | 147 | |
3ee353e9 JM |
148 | /* A scope ref in a template, left as SCOPE_REF to support later |
149 | access checking. */ | |
8ccc31eb | 150 | case SCOPE_REF: |
c5c8755a JM |
151 | gcc_assert (!type_dependent_expression_p (CONST_CAST_TREE (ref))); |
152 | { | |
153 | tree op = TREE_OPERAND (ref, 1); | |
154 | if (TREE_CODE (op) == FIELD_DECL) | |
155 | return (DECL_C_BIT_FIELD (op) ? clk_bitfield : clk_ordinary); | |
156 | else | |
157 | return lvalue_kind (op); | |
158 | } | |
3ee353e9 | 159 | |
27b8d0cd MM |
160 | case MAX_EXPR: |
161 | case MIN_EXPR: | |
d211a298 RS |
162 | /* Disallow <? and >? as lvalues if either argument side-effects. */ |
163 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (ref, 0)) | |
164 | || TREE_SIDE_EFFECTS (TREE_OPERAND (ref, 1))) | |
165 | return clk_none; | |
4e9ca9b0 JM |
166 | op1_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 0)); |
167 | op2_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 1)); | |
8ccc31eb MS |
168 | break; |
169 | ||
170 | case COND_EXPR: | |
4e9ca9b0 | 171 | op1_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 1) |
42924ed7 | 172 | ? TREE_OPERAND (ref, 1) |
df5c89cb | 173 | : TREE_OPERAND (ref, 0)); |
4e9ca9b0 | 174 | op2_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 2)); |
27b8d0cd | 175 | break; |
8ccc31eb MS |
176 | |
177 | case MODIFY_EXPR: | |
e87b4dde | 178 | case TYPEID_EXPR: |
27b8d0cd | 179 | return clk_ordinary; |
8ccc31eb MS |
180 | |
181 | case COMPOUND_EXPR: | |
4e9ca9b0 | 182 | return lvalue_kind (TREE_OPERAND (ref, 1)); |
69851283 MM |
183 | |
184 | case TARGET_EXPR: | |
df5c89cb | 185 | return clk_class; |
69851283 | 186 | |
356955cf | 187 | case VA_ARG_EXPR: |
df5c89cb | 188 | return (CLASS_TYPE_P (TREE_TYPE (ref)) ? clk_class : clk_none); |
c0ad5a31 MM |
189 | |
190 | case CALL_EXPR: | |
e87b4dde JM |
191 | /* We can see calls outside of TARGET_EXPR in templates. */ |
192 | if (CLASS_TYPE_P (TREE_TYPE (ref))) | |
193 | return clk_class; | |
4e8dca1c | 194 | return clk_none; |
69851283 MM |
195 | |
196 | case FUNCTION_DECL: | |
197 | /* All functions (except non-static-member functions) are | |
198 | lvalues. */ | |
9f63daea | 199 | return (DECL_NONSTATIC_MEMBER_FUNCTION_P (ref) |
27b8d0cd | 200 | ? clk_none : clk_ordinary); |
7f85441b | 201 | |
4af9e878 JM |
202 | case BASELINK: |
203 | /* We now represent a reference to a single static member function | |
204 | with a BASELINK. */ | |
1e4ae551 MLI |
205 | /* This CONST_CAST is okay because BASELINK_FUNCTIONS returns |
206 | its argument unmodified and we assign it to a const_tree. */ | |
4e9ca9b0 | 207 | return lvalue_kind (BASELINK_FUNCTIONS (CONST_CAST_TREE (ref))); |
4af9e878 | 208 | |
d17811fd | 209 | case NON_DEPENDENT_EXPR: |
ca8dc274 JM |
210 | /* We just return clk_ordinary for NON_DEPENDENT_EXPR in C++98, but |
211 | in C++11 lvalues don't bind to rvalue references, so we need to | |
212 | work harder to avoid bogus errors (c++/44870). */ | |
213 | if (cxx_dialect < cxx0x) | |
214 | return clk_ordinary; | |
215 | else | |
216 | return lvalue_kind (TREE_OPERAND (ref, 0)); | |
d17811fd | 217 | |
7f85441b | 218 | default: |
e87b4dde JM |
219 | if (!TREE_TYPE (ref)) |
220 | return clk_none; | |
221 | if (CLASS_TYPE_P (TREE_TYPE (ref))) | |
222 | return clk_class; | |
7f85441b | 223 | break; |
8ccc31eb MS |
224 | } |
225 | ||
27b8d0cd MM |
226 | /* If one operand is not an lvalue at all, then this expression is |
227 | not an lvalue. */ | |
228 | if (!op1_lvalue_kind || !op2_lvalue_kind) | |
229 | return clk_none; | |
230 | ||
231 | /* Otherwise, it's an lvalue, and it has all the odd properties | |
232 | contributed by either operand. */ | |
233 | op1_lvalue_kind = op1_lvalue_kind | op2_lvalue_kind; | |
9771799c | 234 | /* It's not an ordinary lvalue if it involves any other kind. */ |
27b8d0cd MM |
235 | if ((op1_lvalue_kind & ~clk_ordinary) != clk_none) |
236 | op1_lvalue_kind &= ~clk_ordinary; | |
9771799c JM |
237 | /* It can't be both a pseudo-lvalue and a non-addressable lvalue. |
238 | A COND_EXPR of those should be wrapped in a TARGET_EXPR. */ | |
239 | if ((op1_lvalue_kind & (clk_rvalueref|clk_class)) | |
240 | && (op1_lvalue_kind & (clk_bitfield|clk_packed))) | |
241 | op1_lvalue_kind = clk_none; | |
27b8d0cd | 242 | return op1_lvalue_kind; |
8ccc31eb MS |
243 | } |
244 | ||
aa6e8ed3 MM |
245 | /* Returns the kind of lvalue that REF is, in the sense of |
246 | [basic.lval]. This function should really be named lvalue_p; it | |
247 | computes the C++ definition of lvalue. */ | |
248 | ||
249 | cp_lvalue_kind | |
4e9ca9b0 | 250 | real_lvalue_p (const_tree ref) |
aa6e8ed3 | 251 | { |
4e9ca9b0 | 252 | cp_lvalue_kind kind = lvalue_kind (ref); |
df5c89cb JM |
253 | if (kind & (clk_rvalueref|clk_class)) |
254 | return clk_none; | |
255 | else | |
256 | return kind; | |
aa6e8ed3 MM |
257 | } |
258 | ||
df5c89cb JM |
259 | /* This differs from real_lvalue_p in that class rvalues are considered |
260 | lvalues. */ | |
69851283 | 261 | |
1e4ae551 MLI |
262 | bool |
263 | lvalue_p (const_tree ref) | |
8d08fdba | 264 | { |
4e9ca9b0 | 265 | return (lvalue_kind (ref) != clk_none); |
df5c89cb JM |
266 | } |
267 | ||
268 | /* This differs from real_lvalue_p in that rvalues formed by dereferencing | |
269 | rvalue references are considered rvalues. */ | |
270 | ||
271 | bool | |
272 | lvalue_or_rvalue_with_address_p (const_tree ref) | |
273 | { | |
4e9ca9b0 | 274 | cp_lvalue_kind kind = lvalue_kind (ref); |
df5c89cb JM |
275 | if (kind & clk_class) |
276 | return false; | |
277 | else | |
278 | return (kind != clk_none); | |
6c6e776d MA |
279 | } |
280 | ||
04398fa8 PC |
281 | /* Returns true if REF is an xvalue, false otherwise. */ |
282 | ||
283 | bool | |
284 | xvalue_p (const_tree ref) | |
285 | { | |
286 | return (lvalue_kind (ref) == clk_rvalueref); | |
287 | } | |
288 | ||
100d337a MA |
289 | /* Test whether DECL is a builtin that may appear in a |
290 | constant-expression. */ | |
291 | ||
292 | bool | |
58f9752a | 293 | builtin_valid_in_constant_expr_p (const_tree decl) |
100d337a MA |
294 | { |
295 | /* At present BUILT_IN_CONSTANT_P is the only builtin we're allowing | |
296 | in constant-expressions. We may want to add other builtins later. */ | |
88a7beb7 | 297 | return DECL_IS_BUILTIN_CONSTANT_P (decl); |
100d337a MA |
298 | } |
299 | ||
c506ca22 MM |
300 | /* Build a TARGET_EXPR, initializing the DECL with the VALUE. */ |
301 | ||
302 | static tree | |
574cfaa4 | 303 | build_target_expr (tree decl, tree value, tsubst_flags_t complain) |
c506ca22 MM |
304 | { |
305 | tree t; | |
30fdd4f2 | 306 | tree type = TREE_TYPE (decl); |
04941f76 AO |
307 | |
308 | #ifdef ENABLE_CHECKING | |
309 | gcc_assert (VOID_TYPE_P (TREE_TYPE (value)) | |
310 | || TREE_TYPE (decl) == TREE_TYPE (value) | |
22d60ad2 | 311 | /* On ARM ctors return 'this'. */ |
50e10fa8 | 312 | || (TYPE_PTR_P (TREE_TYPE (value)) |
22d60ad2 | 313 | && TREE_CODE (value) == CALL_EXPR) |
04941f76 AO |
314 | || useless_type_conversion_p (TREE_TYPE (decl), |
315 | TREE_TYPE (value))); | |
316 | #endif | |
c506ca22 | 317 | |
574cfaa4 JM |
318 | t = cxx_maybe_build_cleanup (decl, complain); |
319 | if (t == error_mark_node) | |
320 | return error_mark_node; | |
30fdd4f2 | 321 | t = build4 (TARGET_EXPR, type, decl, value, t, NULL_TREE); |
c506ca22 MM |
322 | /* We always set TREE_SIDE_EFFECTS so that expand_expr does not |
323 | ignore the TARGET_EXPR. If there really turn out to be no | |
324 | side-effects, then the optimizer should be able to get rid of | |
325 | whatever code is generated anyhow. */ | |
326 | TREE_SIDE_EFFECTS (t) = 1; | |
327 | ||
328 | return t; | |
329 | } | |
330 | ||
a6f86b51 JM |
331 | /* Return an undeclared local temporary of type TYPE for use in building a |
332 | TARGET_EXPR. */ | |
333 | ||
334 | static tree | |
335 | build_local_temp (tree type) | |
336 | { | |
c2255bc4 AH |
337 | tree slot = build_decl (input_location, |
338 | VAR_DECL, NULL_TREE, type); | |
a6f86b51 | 339 | DECL_ARTIFICIAL (slot) = 1; |
78e0d62b | 340 | DECL_IGNORED_P (slot) = 1; |
a6f86b51 JM |
341 | DECL_CONTEXT (slot) = current_function_decl; |
342 | layout_decl (slot, 0); | |
343 | return slot; | |
344 | } | |
345 | ||
5039610b SL |
346 | /* Set various status flags when building an AGGR_INIT_EXPR object T. */ |
347 | ||
348 | static void | |
349 | process_aggr_init_operands (tree t) | |
350 | { | |
351 | bool side_effects; | |
352 | ||
353 | side_effects = TREE_SIDE_EFFECTS (t); | |
354 | if (!side_effects) | |
355 | { | |
356 | int i, n; | |
357 | n = TREE_OPERAND_LENGTH (t); | |
358 | for (i = 1; i < n; i++) | |
359 | { | |
360 | tree op = TREE_OPERAND (t, i); | |
361 | if (op && TREE_SIDE_EFFECTS (op)) | |
362 | { | |
363 | side_effects = 1; | |
364 | break; | |
365 | } | |
366 | } | |
367 | } | |
368 | TREE_SIDE_EFFECTS (t) = side_effects; | |
369 | } | |
370 | ||
371 | /* Build an AGGR_INIT_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE, | |
372 | FN, and SLOT. NARGS is the number of call arguments which are specified | |
373 | as a tree array ARGS. */ | |
374 | ||
375 | static tree | |
376 | build_aggr_init_array (tree return_type, tree fn, tree slot, int nargs, | |
377 | tree *args) | |
378 | { | |
379 | tree t; | |
380 | int i; | |
381 | ||
382 | t = build_vl_exp (AGGR_INIT_EXPR, nargs + 3); | |
383 | TREE_TYPE (t) = return_type; | |
384 | AGGR_INIT_EXPR_FN (t) = fn; | |
385 | AGGR_INIT_EXPR_SLOT (t) = slot; | |
386 | for (i = 0; i < nargs; i++) | |
387 | AGGR_INIT_EXPR_ARG (t, i) = args[i]; | |
388 | process_aggr_init_operands (t); | |
389 | return t; | |
390 | } | |
391 | ||
392 | /* INIT is a CALL_EXPR or AGGR_INIT_EXPR which needs info about its | |
844ae01d | 393 | target. TYPE is the type to be initialized. |
8d08fdba | 394 | |
844ae01d JM |
395 | Build an AGGR_INIT_EXPR to represent the initialization. This function |
396 | differs from build_cplus_new in that an AGGR_INIT_EXPR can only be used | |
397 | to initialize another object, whereas a TARGET_EXPR can either | |
398 | initialize another object or create its own temporary object, and as a | |
399 | result building up a TARGET_EXPR requires that the type's destructor be | |
400 | callable. */ | |
e92cc029 | 401 | |
8d08fdba | 402 | tree |
094484e7 | 403 | build_aggr_init_expr (tree type, tree init) |
8d08fdba | 404 | { |
e1376b00 | 405 | tree fn; |
e8abc66f MS |
406 | tree slot; |
407 | tree rval; | |
4977bab6 | 408 | int is_ctor; |
e8abc66f | 409 | |
e4d7d8cb JM |
410 | /* Don't build AGGR_INIT_EXPR in a template. */ |
411 | if (processing_template_decl) | |
412 | return init; | |
413 | ||
5039610b SL |
414 | if (TREE_CODE (init) == CALL_EXPR) |
415 | fn = CALL_EXPR_FN (init); | |
416 | else if (TREE_CODE (init) == AGGR_INIT_EXPR) | |
417 | fn = AGGR_INIT_EXPR_FN (init); | |
418 | else | |
06126ca2 | 419 | return convert (type, init); |
c11b6f21 | 420 | |
4977bab6 ZW |
421 | is_ctor = (TREE_CODE (fn) == ADDR_EXPR |
422 | && TREE_CODE (TREE_OPERAND (fn, 0)) == FUNCTION_DECL | |
423 | && DECL_CONSTRUCTOR_P (TREE_OPERAND (fn, 0))); | |
424 | ||
e1376b00 MM |
425 | /* We split the CALL_EXPR into its function and its arguments here. |
426 | Then, in expand_expr, we put them back together. The reason for | |
427 | this is that this expression might be a default argument | |
428 | expression. In that case, we need a new temporary every time the | |
429 | expression is used. That's what break_out_target_exprs does; it | |
430 | replaces every AGGR_INIT_EXPR with a copy that uses a fresh | |
431 | temporary slot. Then, expand_expr builds up a call-expression | |
432 | using the new slot. */ | |
4977bab6 ZW |
433 | |
434 | /* If we don't need to use a constructor to create an object of this | |
435 | type, don't mess with AGGR_INIT_EXPR. */ | |
436 | if (is_ctor || TREE_ADDRESSABLE (type)) | |
437 | { | |
844ae01d JM |
438 | slot = build_local_temp (type); |
439 | ||
5039610b SL |
440 | if (TREE_CODE(init) == CALL_EXPR) |
441 | rval = build_aggr_init_array (void_type_node, fn, slot, | |
442 | call_expr_nargs (init), | |
443 | CALL_EXPR_ARGP (init)); | |
444 | else | |
445 | rval = build_aggr_init_array (void_type_node, fn, slot, | |
446 | aggr_init_expr_nargs (init), | |
447 | AGGR_INIT_EXPR_ARGP (init)); | |
4977bab6 ZW |
448 | TREE_SIDE_EFFECTS (rval) = 1; |
449 | AGGR_INIT_VIA_CTOR_P (rval) = is_ctor; | |
d8a0d13e | 450 | TREE_NOTHROW (rval) = TREE_NOTHROW (init); |
4977bab6 ZW |
451 | } |
452 | else | |
453 | rval = init; | |
454 | ||
844ae01d JM |
455 | return rval; |
456 | } | |
457 | ||
458 | /* INIT is a CALL_EXPR or AGGR_INIT_EXPR which needs info about its | |
459 | target. TYPE is the type that this initialization should appear to | |
460 | have. | |
461 | ||
462 | Build an encapsulation of the initialization to perform | |
463 | and return it so that it can be processed by language-independent | |
464 | and language-specific expression expanders. */ | |
465 | ||
466 | tree | |
362115a9 | 467 | build_cplus_new (tree type, tree init, tsubst_flags_t complain) |
844ae01d | 468 | { |
094484e7 | 469 | tree rval = build_aggr_init_expr (type, init); |
844ae01d JM |
470 | tree slot; |
471 | ||
57fcd4f4 JM |
472 | if (!complete_type_or_maybe_complain (type, init, complain)) |
473 | return error_mark_node; | |
474 | ||
0ed4ab44 JM |
475 | /* Make sure that we're not trying to create an instance of an |
476 | abstract class. */ | |
477 | if (abstract_virtuals_error_sfinae (NULL_TREE, type, complain)) | |
478 | return error_mark_node; | |
479 | ||
844ae01d JM |
480 | if (TREE_CODE (rval) == AGGR_INIT_EXPR) |
481 | slot = AGGR_INIT_EXPR_SLOT (rval); | |
236fd18c JM |
482 | else if (TREE_CODE (rval) == CALL_EXPR |
483 | || TREE_CODE (rval) == CONSTRUCTOR) | |
844ae01d JM |
484 | slot = build_local_temp (type); |
485 | else | |
486 | return rval; | |
487 | ||
574cfaa4 | 488 | rval = build_target_expr (slot, rval, complain); |
a6343f61 PC |
489 | |
490 | if (rval != error_mark_node) | |
491 | TARGET_EXPR_IMPLICIT_P (rval) = 1; | |
8d08fdba | 492 | |
8d08fdba MS |
493 | return rval; |
494 | } | |
495 | ||
262a7d6b JM |
496 | /* Subroutine of build_vec_init_expr: Build up a single element |
497 | intialization as a proxy for the full array initialization to get things | |
498 | marked as used and any appropriate diagnostics. | |
499 | ||
500 | Since we're deferring building the actual constructor calls until | |
501 | gimplification time, we need to build one now and throw it away so | |
502 | that the relevant constructor gets mark_used before cgraph decides | |
503 | what functions are needed. Here we assume that init is either | |
504 | NULL_TREE, void_type_node (indicating value-initialization), or | |
505 | another array to copy. */ | |
506 | ||
507 | static tree | |
9c69dcea | 508 | build_vec_init_elt (tree type, tree init, tsubst_flags_t complain) |
262a7d6b | 509 | { |
b73a4704 | 510 | tree inner_type = strip_array_types (type); |
9771b263 | 511 | vec<tree, va_gc> *argvec; |
262a7d6b | 512 | |
b73a4704 JM |
513 | if (integer_zerop (array_type_nelts_total (type)) |
514 | || !CLASS_TYPE_P (inner_type)) | |
262a7d6b JM |
515 | /* No interesting initialization to do. */ |
516 | return integer_zero_node; | |
517 | else if (init == void_type_node) | |
9c69dcea | 518 | return build_value_init (inner_type, complain); |
262a7d6b | 519 | |
b73a4704 JM |
520 | gcc_assert (init == NULL_TREE |
521 | || (same_type_ignoring_top_level_qualifiers_p | |
522 | (type, TREE_TYPE (init)))); | |
523 | ||
524 | argvec = make_tree_vector (); | |
525 | if (init) | |
262a7d6b | 526 | { |
01290963 JM |
527 | tree init_type = strip_array_types (TREE_TYPE (init)); |
528 | tree dummy = build_dummy_object (init_type); | |
262a7d6b JM |
529 | if (!real_lvalue_p (init)) |
530 | dummy = move (dummy); | |
9771b263 | 531 | argvec->quick_push (dummy); |
262a7d6b | 532 | } |
9c69dcea | 533 | init = build_special_member_call (NULL_TREE, complete_ctor_identifier, |
262a7d6b | 534 | &argvec, inner_type, LOOKUP_NORMAL, |
9c69dcea JM |
535 | complain); |
536 | release_tree_vector (argvec); | |
537 | ||
20888def JM |
538 | /* For a trivial constructor, build_over_call creates a TARGET_EXPR. But |
539 | we don't want one here because we aren't creating a temporary. */ | |
540 | if (TREE_CODE (init) == TARGET_EXPR) | |
541 | init = TARGET_EXPR_INITIAL (init); | |
542 | ||
9c69dcea | 543 | return init; |
262a7d6b JM |
544 | } |
545 | ||
b73a4704 JM |
546 | /* Return a TARGET_EXPR which expresses the initialization of an array to |
547 | be named later, either default-initialization or copy-initialization | |
548 | from another array of the same type. */ | |
d5f4eddd JM |
549 | |
550 | tree | |
9c69dcea | 551 | build_vec_init_expr (tree type, tree init, tsubst_flags_t complain) |
d5f4eddd | 552 | { |
b73a4704 | 553 | tree slot; |
4de2f020 | 554 | bool value_init = false; |
9c69dcea | 555 | tree elt_init = build_vec_init_elt (type, init, complain); |
534ecb17 | 556 | |
262a7d6b | 557 | if (init == void_type_node) |
534ecb17 | 558 | { |
4de2f020 JM |
559 | value_init = true; |
560 | init = NULL_TREE; | |
561 | } | |
534ecb17 | 562 | |
b73a4704 JM |
563 | slot = build_local_temp (type); |
564 | init = build2 (VEC_INIT_EXPR, type, slot, init); | |
0a2cdfe6 | 565 | TREE_SIDE_EFFECTS (init) = true; |
d5f4eddd | 566 | SET_EXPR_LOCATION (init, input_location); |
4de2f020 | 567 | |
262a7d6b JM |
568 | if (cxx_dialect >= cxx0x |
569 | && potential_constant_expression (elt_init)) | |
570 | VEC_INIT_EXPR_IS_CONSTEXPR (init) = true; | |
4de2f020 JM |
571 | VEC_INIT_EXPR_VALUE_INIT (init) = value_init; |
572 | ||
d5f4eddd JM |
573 | return init; |
574 | } | |
575 | ||
262a7d6b JM |
576 | /* Give a helpful diagnostic for a non-constexpr VEC_INIT_EXPR in a context |
577 | that requires a constant expression. */ | |
578 | ||
579 | void | |
580 | diagnose_non_constexpr_vec_init (tree expr) | |
581 | { | |
582 | tree type = TREE_TYPE (VEC_INIT_EXPR_SLOT (expr)); | |
583 | tree init, elt_init; | |
584 | if (VEC_INIT_EXPR_VALUE_INIT (expr)) | |
7ac37b96 | 585 | init = void_type_node; |
262a7d6b JM |
586 | else |
587 | init = VEC_INIT_EXPR_INIT (expr); | |
588 | ||
9c69dcea | 589 | elt_init = build_vec_init_elt (type, init, tf_warning_or_error); |
262a7d6b JM |
590 | require_potential_constant_expression (elt_init); |
591 | } | |
592 | ||
534ecb17 JM |
593 | tree |
594 | build_array_copy (tree init) | |
595 | { | |
9c69dcea | 596 | return build_vec_init_expr (TREE_TYPE (init), init, tf_warning_or_error); |
534ecb17 JM |
597 | } |
598 | ||
ab93b543 | 599 | /* Build a TARGET_EXPR using INIT to initialize a new temporary of the |
c506ca22 | 600 | indicated TYPE. */ |
aa36c081 JM |
601 | |
602 | tree | |
574cfaa4 | 603 | build_target_expr_with_type (tree init, tree type, tsubst_flags_t complain) |
aa36c081 | 604 | { |
50bc768d | 605 | gcc_assert (!VOID_TYPE_P (type)); |
59445d74 | 606 | |
309714d4 JM |
607 | if (TREE_CODE (init) == TARGET_EXPR |
608 | || init == error_mark_node) | |
5062dbd5 | 609 | return init; |
d758e847 | 610 | else if (CLASS_TYPE_P (type) && type_has_nontrivial_copy_init (type) |
7efc22ea | 611 | && !VOID_TYPE_P (TREE_TYPE (init)) |
4b5aa881 | 612 | && TREE_CODE (init) != COND_EXPR |
662eceda MM |
613 | && TREE_CODE (init) != CONSTRUCTOR |
614 | && TREE_CODE (init) != VA_ARG_EXPR) | |
7efc22ea JM |
615 | /* We need to build up a copy constructor call. A void initializer |
616 | means we're being called from bot_manip. COND_EXPR is a special | |
182609b5 | 617 | case because we already have copies on the arms and we don't want |
4b5aa881 | 618 | another one here. A CONSTRUCTOR is aggregate initialization, which |
662eceda MM |
619 | is handled separately. A VA_ARG_EXPR is magic creation of an |
620 | aggregate; there's no additional work to be done. */ | |
574cfaa4 | 621 | return force_rvalue (init, complain); |
5062dbd5 | 622 | |
574cfaa4 | 623 | return force_target_expr (type, init, complain); |
a6f86b51 | 624 | } |
aa36c081 | 625 | |
a6f86b51 JM |
626 | /* Like the above function, but without the checking. This function should |
627 | only be used by code which is deliberately trying to subvert the type | |
d758e847 JM |
628 | system, such as call_builtin_trap. Or build_over_call, to avoid |
629 | infinite recursion. */ | |
a6f86b51 JM |
630 | |
631 | tree | |
574cfaa4 | 632 | force_target_expr (tree type, tree init, tsubst_flags_t complain) |
a6f86b51 | 633 | { |
59445d74 RH |
634 | tree slot; |
635 | ||
50bc768d | 636 | gcc_assert (!VOID_TYPE_P (type)); |
59445d74 RH |
637 | |
638 | slot = build_local_temp (type); | |
574cfaa4 | 639 | return build_target_expr (slot, init, complain); |
aa36c081 JM |
640 | } |
641 | ||
c506ca22 MM |
642 | /* Like build_target_expr_with_type, but use the type of INIT. */ |
643 | ||
644 | tree | |
574cfaa4 | 645 | get_target_expr_sfinae (tree init, tsubst_flags_t complain) |
c506ca22 | 646 | { |
450a927a | 647 | if (TREE_CODE (init) == AGGR_INIT_EXPR) |
574cfaa4 | 648 | return build_target_expr (AGGR_INIT_EXPR_SLOT (init), init, complain); |
991e0156 | 649 | else if (TREE_CODE (init) == VEC_INIT_EXPR) |
574cfaa4 | 650 | return build_target_expr (VEC_INIT_EXPR_SLOT (init), init, complain); |
450a927a | 651 | else |
574cfaa4 JM |
652 | return build_target_expr_with_type (init, TREE_TYPE (init), complain); |
653 | } | |
654 | ||
655 | tree | |
656 | get_target_expr (tree init) | |
657 | { | |
658 | return get_target_expr_sfinae (init, tf_warning_or_error); | |
c506ca22 MM |
659 | } |
660 | ||
e1039697 MM |
661 | /* If EXPR is a bitfield reference, convert it to the declared type of |
662 | the bitfield, and return the resulting expression. Otherwise, | |
663 | return EXPR itself. */ | |
664 | ||
665 | tree | |
666 | convert_bitfield_to_declared_type (tree expr) | |
667 | { | |
668 | tree bitfield_type; | |
669 | ||
670 | bitfield_type = is_bitfield_expr_with_lowered_type (expr); | |
671 | if (bitfield_type) | |
41990f96 MM |
672 | expr = convert_to_integer (TYPE_MAIN_VARIANT (bitfield_type), |
673 | expr); | |
e1039697 MM |
674 | return expr; |
675 | } | |
676 | ||
5cc53d4e MM |
677 | /* EXPR is being used in an rvalue context. Return a version of EXPR |
678 | that is marked as an rvalue. */ | |
679 | ||
680 | tree | |
681 | rvalue (tree expr) | |
682 | { | |
41990f96 MM |
683 | tree type; |
684 | ||
685 | if (error_operand_p (expr)) | |
686 | return expr; | |
687 | ||
03a904b5 JJ |
688 | expr = mark_rvalue_use (expr); |
689 | ||
41990f96 MM |
690 | /* [basic.lval] |
691 | ||
692 | Non-class rvalues always have cv-unqualified types. */ | |
693 | type = TREE_TYPE (expr); | |
36c37128 JM |
694 | if (!CLASS_TYPE_P (type) && cv_qualified_p (type)) |
695 | type = cv_unqualified (type); | |
41990f96 | 696 | |
b9c6b842 JM |
697 | /* We need to do this for rvalue refs as well to get the right answer |
698 | from decltype; see c++/36628. */ | |
699 | if (!processing_template_decl && lvalue_or_rvalue_with_address_p (expr)) | |
41990f96 MM |
700 | expr = build1 (NON_LVALUE_EXPR, type, expr); |
701 | else if (type != TREE_TYPE (expr)) | |
702 | expr = build_nop (type, expr); | |
703 | ||
5cc53d4e MM |
704 | return expr; |
705 | } | |
706 | ||
8d08fdba | 707 | \f |
06d40de8 DG |
708 | /* Hash an ARRAY_TYPE. K is really of type `tree'. */ |
709 | ||
710 | static hashval_t | |
711 | cplus_array_hash (const void* k) | |
712 | { | |
713 | hashval_t hash; | |
741ac903 | 714 | const_tree const t = (const_tree) k; |
06d40de8 | 715 | |
eb9c434c JJ |
716 | hash = TYPE_UID (TREE_TYPE (t)); |
717 | if (TYPE_DOMAIN (t)) | |
718 | hash ^= TYPE_UID (TYPE_DOMAIN (t)); | |
06d40de8 DG |
719 | return hash; |
720 | } | |
721 | ||
722 | typedef struct cplus_array_info { | |
723 | tree type; | |
724 | tree domain; | |
725 | } cplus_array_info; | |
726 | ||
727 | /* Compare two ARRAY_TYPEs. K1 is really of type `tree', K2 is really | |
728 | of type `cplus_array_info*'. */ | |
729 | ||
730 | static int | |
731 | cplus_array_compare (const void * k1, const void * k2) | |
732 | { | |
741ac903 KG |
733 | const_tree const t1 = (const_tree) k1; |
734 | const cplus_array_info *const t2 = (const cplus_array_info*) k2; | |
06d40de8 | 735 | |
714f2304 | 736 | return (TREE_TYPE (t1) == t2->type && TYPE_DOMAIN (t1) == t2->domain); |
06d40de8 DG |
737 | } |
738 | ||
38e40fcd JM |
739 | /* Hash table containing dependent array types, which are unsuitable for |
740 | the language-independent type hash table. */ | |
06d40de8 DG |
741 | static GTY ((param_is (union tree_node))) htab_t cplus_array_htab; |
742 | ||
38e40fcd | 743 | /* Like build_array_type, but handle special C++ semantics. */ |
06d40de8 | 744 | |
38e40fcd JM |
745 | tree |
746 | build_cplus_array_type (tree elt_type, tree index_type) | |
8d08fdba | 747 | { |
8d08fdba MS |
748 | tree t; |
749 | ||
adecb3f4 MM |
750 | if (elt_type == error_mark_node || index_type == error_mark_node) |
751 | return error_mark_node; | |
752 | ||
6da06848 JJ |
753 | if (processing_template_decl |
754 | && (dependent_type_p (elt_type) | |
755 | || (index_type && !TREE_CONSTANT (TYPE_MAX_VALUE (index_type))))) | |
5566b478 | 756 | { |
06d40de8 DG |
757 | void **e; |
758 | cplus_array_info cai; | |
759 | hashval_t hash; | |
714f2304 | 760 | |
06d40de8 DG |
761 | if (cplus_array_htab == NULL) |
762 | cplus_array_htab = htab_create_ggc (61, &cplus_array_hash, | |
763 | &cplus_array_compare, NULL); | |
764 | ||
eb9c434c JJ |
765 | hash = TYPE_UID (elt_type); |
766 | if (index_type) | |
767 | hash ^= TYPE_UID (index_type); | |
06d40de8 DG |
768 | cai.type = elt_type; |
769 | cai.domain = index_type; | |
770 | ||
771 | e = htab_find_slot_with_hash (cplus_array_htab, &cai, hash, INSERT); | |
772 | if (*e) | |
714f2304 | 773 | /* We have found the type: we're done. */ |
06d40de8 DG |
774 | return (tree) *e; |
775 | else | |
776 | { | |
714f2304 | 777 | /* Build a new array type. */ |
7ecbca9d | 778 | t = cxx_make_type (ARRAY_TYPE); |
06d40de8 DG |
779 | TREE_TYPE (t) = elt_type; |
780 | TYPE_DOMAIN (t) = index_type; | |
781 | ||
714f2304 DG |
782 | /* Store it in the hash table. */ |
783 | *e = t; | |
784 | ||
785 | /* Set the canonical type for this new node. */ | |
06d40de8 DG |
786 | if (TYPE_STRUCTURAL_EQUALITY_P (elt_type) |
787 | || (index_type && TYPE_STRUCTURAL_EQUALITY_P (index_type))) | |
788 | SET_TYPE_STRUCTURAL_EQUALITY (t); | |
789 | else if (TYPE_CANONICAL (elt_type) != elt_type | |
790 | || (index_type | |
791 | && TYPE_CANONICAL (index_type) != index_type)) | |
714f2304 DG |
792 | TYPE_CANONICAL (t) |
793 | = build_cplus_array_type | |
794 | (TYPE_CANONICAL (elt_type), | |
6da06848 | 795 | index_type ? TYPE_CANONICAL (index_type) : index_type); |
714f2304 DG |
796 | else |
797 | TYPE_CANONICAL (t) = t; | |
06d40de8 | 798 | } |
5566b478 MS |
799 | } |
800 | else | |
3ebc22c1 JM |
801 | { |
802 | if (!TYPE_STRUCTURAL_EQUALITY_P (elt_type) | |
803 | && !(index_type && TYPE_STRUCTURAL_EQUALITY_P (index_type)) | |
804 | && (TYPE_CANONICAL (elt_type) != elt_type | |
805 | || (index_type && TYPE_CANONICAL (index_type) != index_type))) | |
806 | /* Make sure that the canonical type is on the appropriate | |
807 | variants list. */ | |
808 | build_cplus_array_type | |
809 | (TYPE_CANONICAL (elt_type), | |
810 | index_type ? TYPE_CANONICAL (index_type) : index_type); | |
811 | t = build_array_type (elt_type, index_type); | |
812 | } | |
8d08fdba | 813 | |
e78167f2 JM |
814 | /* Push these needs up so that initialization takes place |
815 | more easily. */ | |
816 | bool needs_ctor | |
817 | = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type)); | |
818 | TYPE_NEEDS_CONSTRUCTING (t) = needs_ctor; | |
819 | bool needs_dtor | |
820 | = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type)); | |
821 | TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t) = needs_dtor; | |
822 | ||
38e40fcd JM |
823 | /* We want TYPE_MAIN_VARIANT of an array to strip cv-quals from the |
824 | element type as well, so fix it up if needed. */ | |
825 | if (elt_type != TYPE_MAIN_VARIANT (elt_type)) | |
826 | { | |
827 | tree m = build_cplus_array_type (TYPE_MAIN_VARIANT (elt_type), | |
828 | index_type); | |
697c474c | 829 | |
38e40fcd JM |
830 | if (TYPE_MAIN_VARIANT (t) != m) |
831 | { | |
e78167f2 JM |
832 | if (COMPLETE_TYPE_P (t) && !COMPLETE_TYPE_P (m)) |
833 | { | |
834 | /* m was built before the element type was complete, so we | |
835 | also need to copy the layout info from t. */ | |
836 | tree size = TYPE_SIZE (t); | |
837 | tree size_unit = TYPE_SIZE_UNIT (t); | |
838 | unsigned int align = TYPE_ALIGN (t); | |
839 | unsigned int user_align = TYPE_USER_ALIGN (t); | |
840 | enum machine_mode mode = TYPE_MODE (t); | |
841 | for (tree var = m; var; var = TYPE_NEXT_VARIANT (var)) | |
842 | { | |
843 | TYPE_SIZE (var) = size; | |
844 | TYPE_SIZE_UNIT (var) = size_unit; | |
845 | TYPE_ALIGN (var) = align; | |
846 | TYPE_USER_ALIGN (var) = user_align; | |
847 | SET_TYPE_MODE (var, mode); | |
848 | TYPE_NEEDS_CONSTRUCTING (var) = needs_ctor; | |
849 | TYPE_HAS_NONTRIVIAL_DESTRUCTOR (var) = needs_dtor; | |
850 | } | |
851 | } | |
852 | ||
38e40fcd JM |
853 | TYPE_MAIN_VARIANT (t) = m; |
854 | TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (m); | |
855 | TYPE_NEXT_VARIANT (m) = t; | |
856 | } | |
857 | } | |
858 | ||
03d31730 PC |
859 | /* Avoid spurious warnings with VLAs (c++/54583). */ |
860 | if (TYPE_SIZE (t) && EXPR_P (TYPE_SIZE (t))) | |
861 | TREE_NO_WARNING (TYPE_SIZE (t)) = 1; | |
862 | ||
8d08fdba MS |
863 | return t; |
864 | } | |
e349ee73 | 865 | |
09357846 JM |
866 | /* Return an ARRAY_TYPE with element type ELT and length N. */ |
867 | ||
868 | tree | |
869 | build_array_of_n_type (tree elt, int n) | |
870 | { | |
871 | return build_cplus_array_type (elt, build_index_type (size_int (n - 1))); | |
872 | } | |
873 | ||
8af2fec4 RY |
874 | /* Return a reference type node referring to TO_TYPE. If RVAL is |
875 | true, return an rvalue reference type, otherwise return an lvalue | |
876 | reference type. If a type node exists, reuse it, otherwise create | |
877 | a new one. */ | |
878 | tree | |
879 | cp_build_reference_type (tree to_type, bool rval) | |
880 | { | |
881 | tree lvalue_ref, t; | |
882 | lvalue_ref = build_reference_type (to_type); | |
883 | if (!rval) | |
884 | return lvalue_ref; | |
885 | ||
886 | /* This code to create rvalue reference types is based on and tied | |
887 | to the code creating lvalue reference types in the middle-end | |
888 | functions build_reference_type_for_mode and build_reference_type. | |
889 | ||
890 | It works by putting the rvalue reference type nodes after the | |
891 | lvalue reference nodes in the TYPE_NEXT_REF_TO linked list, so | |
892 | they will effectively be ignored by the middle end. */ | |
893 | ||
894 | for (t = lvalue_ref; (t = TYPE_NEXT_REF_TO (t)); ) | |
895 | if (TYPE_REF_IS_RVALUE (t)) | |
896 | return t; | |
897 | ||
22521c89 | 898 | t = build_distinct_type_copy (lvalue_ref); |
8af2fec4 RY |
899 | |
900 | TYPE_REF_IS_RVALUE (t) = true; | |
901 | TYPE_NEXT_REF_TO (t) = TYPE_NEXT_REF_TO (lvalue_ref); | |
902 | TYPE_NEXT_REF_TO (lvalue_ref) = t; | |
8af2fec4 RY |
903 | |
904 | if (TYPE_STRUCTURAL_EQUALITY_P (to_type)) | |
905 | SET_TYPE_STRUCTURAL_EQUALITY (t); | |
906 | else if (TYPE_CANONICAL (to_type) != to_type) | |
907 | TYPE_CANONICAL (t) | |
908 | = cp_build_reference_type (TYPE_CANONICAL (to_type), rval); | |
909 | else | |
910 | TYPE_CANONICAL (t) = t; | |
911 | ||
912 | layout_type (t); | |
913 | ||
914 | return t; | |
915 | ||
916 | } | |
917 | ||
d5f4eddd JM |
918 | /* Returns EXPR cast to rvalue reference type, like std::move. */ |
919 | ||
920 | tree | |
921 | move (tree expr) | |
922 | { | |
923 | tree type = TREE_TYPE (expr); | |
924 | gcc_assert (TREE_CODE (type) != REFERENCE_TYPE); | |
925 | type = cp_build_reference_type (type, /*rval*/true); | |
926 | return build_static_cast (type, expr, tf_warning_or_error); | |
927 | } | |
928 | ||
9ae165a0 DG |
929 | /* Used by the C++ front end to build qualified array types. However, |
930 | the C version of this function does not properly maintain canonical | |
931 | types (which are not used in C). */ | |
932 | tree | |
933 | c_build_qualified_type (tree type, int type_quals) | |
934 | { | |
935 | return cp_build_qualified_type (type, type_quals); | |
936 | } | |
8af2fec4 | 937 | |
8d08fdba | 938 | \f |
adecb3f4 MM |
939 | /* Make a variant of TYPE, qualified with the TYPE_QUALS. Handles |
940 | arrays correctly. In particular, if TYPE is an array of T's, and | |
c2ea3a40 | 941 | TYPE_QUALS is non-empty, returns an array of qualified T's. |
9f63daea | 942 | |
39a13be5 | 943 | FLAGS determines how to deal with ill-formed qualifications. If |
4f2b0fb2 NS |
944 | tf_ignore_bad_quals is set, then bad qualifications are dropped |
945 | (this is permitted if TYPE was introduced via a typedef or template | |
946 | type parameter). If bad qualifications are dropped and tf_warning | |
947 | is set, then a warning is issued for non-const qualifications. If | |
948 | tf_ignore_bad_quals is not set and tf_error is not set, we | |
949 | return error_mark_node. Otherwise, we issue an error, and ignore | |
950 | the qualifications. | |
951 | ||
952 | Qualification of a reference type is valid when the reference came | |
953 | via a typedef or template type argument. [dcl.ref] No such | |
954 | dispensation is provided for qualifying a function type. [dcl.fct] | |
955 | DR 295 queries this and the proposed resolution brings it into line | |
34cd5ae7 | 956 | with qualifying a reference. We implement the DR. We also behave |
4f2b0fb2 | 957 | in a similar manner for restricting non-pointer types. */ |
9f63daea | 958 | |
f376e137 | 959 | tree |
9f63daea | 960 | cp_build_qualified_type_real (tree type, |
0cbd7506 MS |
961 | int type_quals, |
962 | tsubst_flags_t complain) | |
f376e137 | 963 | { |
2adeacc9 | 964 | tree result; |
4f2b0fb2 | 965 | int bad_quals = TYPE_UNQUALIFIED; |
2adeacc9 | 966 | |
e76a2646 MS |
967 | if (type == error_mark_node) |
968 | return type; | |
e271912d | 969 | |
89d684bb | 970 | if (type_quals == cp_type_quals (type)) |
e271912d JM |
971 | return type; |
972 | ||
4f2b0fb2 | 973 | if (TREE_CODE (type) == ARRAY_TYPE) |
f376e137 | 974 | { |
db3626d1 MM |
975 | /* In C++, the qualification really applies to the array element |
976 | type. Obtain the appropriately qualified element type. */ | |
977 | tree t; | |
9f63daea EC |
978 | tree element_type |
979 | = cp_build_qualified_type_real (TREE_TYPE (type), | |
db3626d1 MM |
980 | type_quals, |
981 | complain); | |
982 | ||
983 | if (element_type == error_mark_node) | |
adecb3f4 | 984 | return error_mark_node; |
f376e137 | 985 | |
38e40fcd JM |
986 | /* See if we already have an identically qualified type. Tests |
987 | should be equivalent to those in check_qualified_type. */ | |
29fae15c | 988 | for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) |
ef765996 | 989 | if (TREE_TYPE (t) == element_type |
29fae15c | 990 | && TYPE_NAME (t) == TYPE_NAME (type) |
38e40fcd JM |
991 | && TYPE_CONTEXT (t) == TYPE_CONTEXT (type) |
992 | && attribute_list_equal (TYPE_ATTRIBUTES (t), | |
993 | TYPE_ATTRIBUTES (type))) | |
29fae15c | 994 | break; |
9f63daea | 995 | |
29fae15c | 996 | if (!t) |
38e40fcd JM |
997 | { |
998 | t = build_cplus_array_type (element_type, TYPE_DOMAIN (type)); | |
999 | ||
1000 | /* Keep the typedef name. */ | |
1001 | if (TYPE_NAME (t) != TYPE_NAME (type)) | |
1002 | { | |
1003 | t = build_variant_type_copy (t); | |
1004 | TYPE_NAME (t) = TYPE_NAME (type); | |
1005 | } | |
1006 | } | |
f376e137 | 1007 | |
db3626d1 | 1008 | /* Even if we already had this variant, we update |
834c6dff | 1009 | TYPE_NEEDS_CONSTRUCTING and TYPE_HAS_NONTRIVIAL_DESTRUCTOR in case |
9f63daea EC |
1010 | they changed since the variant was originally created. |
1011 | ||
db3626d1 MM |
1012 | This seems hokey; if there is some way to use a previous |
1013 | variant *without* coming through here, | |
1014 | TYPE_NEEDS_CONSTRUCTING will never be updated. */ | |
9f63daea | 1015 | TYPE_NEEDS_CONSTRUCTING (t) |
db3626d1 | 1016 | = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (element_type)); |
9f63daea | 1017 | TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t) |
834c6dff | 1018 | = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (element_type)); |
db3626d1 | 1019 | return t; |
f376e137 | 1020 | } |
2adeacc9 MM |
1021 | else if (TYPE_PTRMEMFUNC_P (type)) |
1022 | { | |
1023 | /* For a pointer-to-member type, we can't just return a | |
1024 | cv-qualified version of the RECORD_TYPE. If we do, we | |
4f2b0fb2 | 1025 | haven't changed the field that contains the actual pointer to |
2adeacc9 MM |
1026 | a method, and so TYPE_PTRMEMFUNC_FN_TYPE will be wrong. */ |
1027 | tree t; | |
1028 | ||
1029 | t = TYPE_PTRMEMFUNC_FN_TYPE (type); | |
1030 | t = cp_build_qualified_type_real (t, type_quals, complain); | |
46cbda4a | 1031 | return build_ptrmemfunc_type (t); |
2adeacc9 | 1032 | } |
9a3c2683 JJ |
1033 | else if (TREE_CODE (type) == TYPE_PACK_EXPANSION) |
1034 | { | |
1035 | tree t = PACK_EXPANSION_PATTERN (type); | |
1036 | ||
1037 | t = cp_build_qualified_type_real (t, type_quals, complain); | |
1038 | return make_pack_expansion (t); | |
1039 | } | |
9f63daea | 1040 | |
39a13be5 | 1041 | /* A reference or method type shall not be cv-qualified. |
93e1ddcf JM |
1042 | [dcl.ref], [dcl.fct]. This used to be an error, but as of DR 295 |
1043 | (in CD1) we always ignore extra cv-quals on functions. */ | |
4b011bbf JM |
1044 | if (type_quals & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE) |
1045 | && (TREE_CODE (type) == REFERENCE_TYPE | |
2872152c | 1046 | || TREE_CODE (type) == FUNCTION_TYPE |
4b011bbf JM |
1047 | || TREE_CODE (type) == METHOD_TYPE)) |
1048 | { | |
93e1ddcf JM |
1049 | if (TREE_CODE (type) == REFERENCE_TYPE) |
1050 | bad_quals |= type_quals & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE); | |
4b011bbf JM |
1051 | type_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE); |
1052 | } | |
9f63daea | 1053 | |
2872152c JM |
1054 | /* But preserve any function-cv-quals on a FUNCTION_TYPE. */ |
1055 | if (TREE_CODE (type) == FUNCTION_TYPE) | |
1056 | type_quals |= type_memfn_quals (type); | |
1057 | ||
4b011bbf | 1058 | /* A restrict-qualified type must be a pointer (or reference) |
0d9c0892 | 1059 | to object or incomplete type. */ |
4b011bbf JM |
1060 | if ((type_quals & TYPE_QUAL_RESTRICT) |
1061 | && TREE_CODE (type) != TEMPLATE_TYPE_PARM | |
1062 | && TREE_CODE (type) != TYPENAME_TYPE | |
1063 | && !POINTER_TYPE_P (type)) | |
1064 | { | |
1065 | bad_quals |= TYPE_QUAL_RESTRICT; | |
1066 | type_quals &= ~TYPE_QUAL_RESTRICT; | |
1067 | } | |
1068 | ||
93e1ddcf JM |
1069 | if (bad_quals == TYPE_UNQUALIFIED |
1070 | || (complain & tf_ignore_bad_quals)) | |
4b011bbf | 1071 | /*OK*/; |
93e1ddcf | 1072 | else if (!(complain & tf_error)) |
4b011bbf | 1073 | return error_mark_node; |
4b011bbf JM |
1074 | else |
1075 | { | |
93e1ddcf JM |
1076 | tree bad_type = build_qualified_type (ptr_type_node, bad_quals); |
1077 | error ("%qV qualifiers cannot be applied to %qT", | |
1078 | bad_type, type); | |
4b011bbf | 1079 | } |
9f63daea | 1080 | |
2adeacc9 MM |
1081 | /* Retrieve (or create) the appropriately qualified variant. */ |
1082 | result = build_qualified_type (type, type_quals); | |
1083 | ||
2eed8e37 BK |
1084 | /* Preserve exception specs and ref-qualifier since build_qualified_type |
1085 | doesn't know about them. */ | |
1086 | if (TREE_CODE (result) == FUNCTION_TYPE | |
1087 | || TREE_CODE (result) == METHOD_TYPE) | |
1088 | { | |
1089 | result = build_exception_variant (result, TYPE_RAISES_EXCEPTIONS (type)); | |
1090 | result = build_ref_qualified_type (result, type_memfn_rqual (type)); | |
1091 | } | |
1092 | ||
2adeacc9 | 1093 | /* If this was a pointer-to-method type, and we just made a copy, |
3cfab7ec GK |
1094 | then we need to unshare the record that holds the cached |
1095 | pointer-to-member-function type, because these will be distinct | |
1096 | between the unqualified and qualified types. */ | |
9f63daea | 1097 | if (result != type |
50e10fa8 | 1098 | && TYPE_PTR_P (type) |
0f67bdf1 JM |
1099 | && TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE |
1100 | && TYPE_LANG_SPECIFIC (result) == TYPE_LANG_SPECIFIC (type)) | |
3cfab7ec | 1101 | TYPE_LANG_SPECIFIC (result) = NULL; |
2adeacc9 | 1102 | |
7aa4a1df DG |
1103 | /* We may also have ended up building a new copy of the canonical |
1104 | type of a pointer-to-method type, which could have the same | |
1105 | sharing problem described above. */ | |
1106 | if (TYPE_CANONICAL (result) != TYPE_CANONICAL (type) | |
50e10fa8 | 1107 | && TYPE_PTR_P (type) |
7aa4a1df DG |
1108 | && TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE |
1109 | && (TYPE_LANG_SPECIFIC (TYPE_CANONICAL (result)) | |
1110 | == TYPE_LANG_SPECIFIC (TYPE_CANONICAL (type)))) | |
1111 | TYPE_LANG_SPECIFIC (TYPE_CANONICAL (result)) = NULL; | |
7aa4a1df | 1112 | |
2adeacc9 | 1113 | return result; |
f376e137 | 1114 | } |
53929c47 | 1115 | |
164247b0 JM |
1116 | /* Return TYPE with const and volatile removed. */ |
1117 | ||
1118 | tree | |
1119 | cv_unqualified (tree type) | |
1120 | { | |
ea8b8aa0 JM |
1121 | int quals; |
1122 | ||
1123 | if (type == error_mark_node) | |
1124 | return type; | |
1125 | ||
a3360e77 | 1126 | quals = cp_type_quals (type); |
164247b0 JM |
1127 | quals &= ~(TYPE_QUAL_CONST|TYPE_QUAL_VOLATILE); |
1128 | return cp_build_qualified_type (type, quals); | |
1129 | } | |
1130 | ||
cd41d410 DS |
1131 | /* Builds a qualified variant of T that is not a typedef variant. |
1132 | E.g. consider the following declarations: | |
1133 | typedef const int ConstInt; | |
1134 | typedef ConstInt* PtrConstInt; | |
1135 | If T is PtrConstInt, this function returns a type representing | |
1136 | const int*. | |
1137 | In other words, if T is a typedef, the function returns the underlying type. | |
1138 | The cv-qualification and attributes of the type returned match the | |
1139 | input type. | |
1140 | They will always be compatible types. | |
1141 | The returned type is built so that all of its subtypes | |
1142 | recursively have their typedefs stripped as well. | |
1143 | ||
1144 | This is different from just returning TYPE_CANONICAL (T) | |
1145 | Because of several reasons: | |
1146 | * If T is a type that needs structural equality | |
1147 | its TYPE_CANONICAL (T) will be NULL. | |
1148 | * TYPE_CANONICAL (T) desn't carry type attributes | |
49bb4bbe | 1149 | and loses template parameter names. */ |
53929c47 JM |
1150 | |
1151 | tree | |
cd41d410 | 1152 | strip_typedefs (tree t) |
53929c47 | 1153 | { |
cd41d410 DS |
1154 | tree result = NULL, type = NULL, t0 = NULL; |
1155 | ||
1156 | if (!t || t == error_mark_node || t == TYPE_CANONICAL (t)) | |
1157 | return t; | |
1158 | ||
1159 | gcc_assert (TYPE_P (t)); | |
1160 | ||
1161 | switch (TREE_CODE (t)) | |
1162 | { | |
1163 | case POINTER_TYPE: | |
1164 | type = strip_typedefs (TREE_TYPE (t)); | |
1165 | result = build_pointer_type (type); | |
1166 | break; | |
1167 | case REFERENCE_TYPE: | |
1168 | type = strip_typedefs (TREE_TYPE (t)); | |
1169 | result = cp_build_reference_type (type, TYPE_REF_IS_RVALUE (t)); | |
1170 | break; | |
1171 | case OFFSET_TYPE: | |
1172 | t0 = strip_typedefs (TYPE_OFFSET_BASETYPE (t)); | |
1173 | type = strip_typedefs (TREE_TYPE (t)); | |
1174 | result = build_offset_type (t0, type); | |
1175 | break; | |
1176 | case RECORD_TYPE: | |
1177 | if (TYPE_PTRMEMFUNC_P (t)) | |
1178 | { | |
1179 | t0 = strip_typedefs (TYPE_PTRMEMFUNC_FN_TYPE (t)); | |
1180 | result = build_ptrmemfunc_type (t0); | |
1181 | } | |
1182 | break; | |
1183 | case ARRAY_TYPE: | |
1184 | type = strip_typedefs (TREE_TYPE (t)); | |
1185 | t0 = strip_typedefs (TYPE_DOMAIN (t));; | |
1186 | result = build_cplus_array_type (type, t0); | |
1187 | break; | |
1188 | case FUNCTION_TYPE: | |
1189 | case METHOD_TYPE: | |
1190 | { | |
1191 | tree arg_types = NULL, arg_node, arg_type; | |
1192 | for (arg_node = TYPE_ARG_TYPES (t); | |
1193 | arg_node; | |
1194 | arg_node = TREE_CHAIN (arg_node)) | |
1195 | { | |
1196 | if (arg_node == void_list_node) | |
1197 | break; | |
1198 | arg_type = strip_typedefs (TREE_VALUE (arg_node)); | |
1199 | gcc_assert (arg_type); | |
1200 | ||
1201 | arg_types = | |
1202 | tree_cons (TREE_PURPOSE (arg_node), arg_type, arg_types); | |
1203 | } | |
1204 | ||
1205 | if (arg_types) | |
1206 | arg_types = nreverse (arg_types); | |
1207 | ||
1208 | /* A list of parameters not ending with an ellipsis | |
1209 | must end with void_list_node. */ | |
1210 | if (arg_node) | |
1211 | arg_types = chainon (arg_types, void_list_node); | |
1212 | ||
1213 | type = strip_typedefs (TREE_TYPE (t)); | |
1214 | if (TREE_CODE (t) == METHOD_TYPE) | |
1215 | { | |
1216 | tree class_type = TREE_TYPE (TREE_VALUE (arg_types)); | |
1217 | gcc_assert (class_type); | |
1218 | result = | |
1219 | build_method_type_directly (class_type, type, | |
1220 | TREE_CHAIN (arg_types)); | |
1221 | } | |
1222 | else | |
2872152c | 1223 | { |
cd41d410 DS |
1224 | result = build_function_type (type, |
1225 | arg_types); | |
2eed8e37 BK |
1226 | result = apply_memfn_quals (result, |
1227 | type_memfn_quals (t), | |
1228 | type_memfn_rqual (t)); | |
2872152c | 1229 | } |
3c3905fc JM |
1230 | |
1231 | if (TYPE_RAISES_EXCEPTIONS (t)) | |
1232 | result = build_exception_variant (result, | |
1233 | TYPE_RAISES_EXCEPTIONS (t)); | |
cd41d410 DS |
1234 | } |
1235 | break; | |
e6c2fc5d | 1236 | case TYPENAME_TYPE: |
5b5d851e JM |
1237 | { |
1238 | tree fullname = TYPENAME_TYPE_FULLNAME (t); | |
9ebced77 JJ |
1239 | if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR |
1240 | && TREE_OPERAND (fullname, 1)) | |
5b5d851e JM |
1241 | { |
1242 | tree args = TREE_OPERAND (fullname, 1); | |
1243 | tree new_args = copy_node (args); | |
1244 | bool changed = false; | |
1245 | for (int i = 0; i < TREE_VEC_LENGTH (args); ++i) | |
1246 | { | |
1247 | tree arg = TREE_VEC_ELT (args, i); | |
1248 | tree strip_arg; | |
1249 | if (TYPE_P (arg)) | |
1250 | strip_arg = strip_typedefs (arg); | |
1251 | else | |
1252 | strip_arg = strip_typedefs_expr (arg); | |
1253 | TREE_VEC_ELT (new_args, i) = strip_arg; | |
1254 | if (strip_arg != arg) | |
1255 | changed = true; | |
1256 | } | |
1257 | if (changed) | |
7349ed05 JJ |
1258 | { |
1259 | NON_DEFAULT_TEMPLATE_ARGS_COUNT (new_args) | |
1260 | = NON_DEFAULT_TEMPLATE_ARGS_COUNT (args); | |
1261 | fullname | |
1262 | = lookup_template_function (TREE_OPERAND (fullname, 0), | |
1263 | new_args); | |
1264 | } | |
5b5d851e JM |
1265 | else |
1266 | ggc_free (new_args); | |
1267 | } | |
1268 | result = make_typename_type (strip_typedefs (TYPE_CONTEXT (t)), | |
1269 | fullname, typename_type, tf_none); | |
1270 | } | |
e6c2fc5d | 1271 | break; |
49bb4bbe JM |
1272 | case DECLTYPE_TYPE: |
1273 | result = strip_typedefs_expr (DECLTYPE_TYPE_EXPR (t)); | |
1274 | if (result == DECLTYPE_TYPE_EXPR (t)) | |
1275 | return t; | |
1276 | else | |
1277 | result = (finish_decltype_type | |
1278 | (result, | |
1279 | DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P (t), | |
1280 | tf_none)); | |
1281 | break; | |
cd41d410 DS |
1282 | default: |
1283 | break; | |
1284 | } | |
1ad8aeeb | 1285 | |
cd41d410 DS |
1286 | if (!result) |
1287 | result = TYPE_MAIN_VARIANT (t); | |
05322543 JM |
1288 | if (TYPE_USER_ALIGN (t) != TYPE_USER_ALIGN (result) |
1289 | || TYPE_ALIGN (t) != TYPE_ALIGN (result)) | |
1290 | { | |
1291 | gcc_assert (TYPE_USER_ALIGN (t)); | |
1292 | if (TYPE_ALIGN (t) == TYPE_ALIGN (result)) | |
1293 | result = build_variant_type_copy (result); | |
1294 | else | |
1295 | result = build_aligned_type (result, TYPE_ALIGN (t)); | |
1296 | TYPE_USER_ALIGN (result) = true; | |
1297 | } | |
3c3905fc JM |
1298 | if (TYPE_ATTRIBUTES (t)) |
1299 | result = cp_build_type_attribute_variant (result, TYPE_ATTRIBUTES (t)); | |
cd41d410 | 1300 | return cp_build_qualified_type (result, cp_type_quals (t)); |
53929c47 | 1301 | } |
cd41d410 | 1302 | |
49bb4bbe JM |
1303 | /* Like strip_typedefs above, but works on expressions, so that in |
1304 | ||
1305 | template<class T> struct A | |
1306 | { | |
1307 | typedef T TT; | |
1308 | B<sizeof(TT)> b; | |
1309 | }; | |
1310 | ||
1311 | sizeof(TT) is replaced by sizeof(T). */ | |
1312 | ||
1313 | tree | |
1314 | strip_typedefs_expr (tree t) | |
1315 | { | |
1316 | unsigned i,n; | |
1317 | tree r, type, *ops; | |
1318 | enum tree_code code; | |
1319 | ||
1320 | if (t == NULL_TREE || t == error_mark_node) | |
1321 | return t; | |
1322 | ||
1323 | if (DECL_P (t) || CONSTANT_CLASS_P (t)) | |
1324 | return t; | |
1325 | ||
1326 | /* Some expressions have type operands, so let's handle types here rather | |
1327 | than check TYPE_P in multiple places below. */ | |
1328 | if (TYPE_P (t)) | |
1329 | return strip_typedefs (t); | |
1330 | ||
1331 | code = TREE_CODE (t); | |
1332 | switch (code) | |
1333 | { | |
1334 | case IDENTIFIER_NODE: | |
1335 | case TEMPLATE_PARM_INDEX: | |
1336 | case OVERLOAD: | |
1337 | case BASELINK: | |
1338 | case ARGUMENT_PACK_SELECT: | |
1339 | return t; | |
1340 | ||
1341 | case TRAIT_EXPR: | |
1342 | { | |
1343 | tree type1 = strip_typedefs (TRAIT_EXPR_TYPE1 (t)); | |
1344 | tree type2 = strip_typedefs (TRAIT_EXPR_TYPE2 (t)); | |
1345 | if (type1 == TRAIT_EXPR_TYPE1 (t) | |
1346 | && type2 == TRAIT_EXPR_TYPE2 (t)) | |
1347 | return t; | |
1348 | r = copy_node (t); | |
1349 | TRAIT_EXPR_TYPE1 (t) = type1; | |
1350 | TRAIT_EXPR_TYPE2 (t) = type2; | |
1351 | return r; | |
1352 | } | |
1353 | ||
1354 | case TREE_LIST: | |
1355 | { | |
9771b263 | 1356 | vec<tree, va_gc> *vec = make_tree_vector (); |
49bb4bbe JM |
1357 | bool changed = false; |
1358 | tree it; | |
1359 | for (it = t; it; it = TREE_CHAIN (it)) | |
1360 | { | |
1361 | tree val = strip_typedefs_expr (TREE_VALUE (t)); | |
9771b263 | 1362 | vec_safe_push (vec, val); |
49bb4bbe JM |
1363 | if (val != TREE_VALUE (t)) |
1364 | changed = true; | |
1365 | gcc_assert (TREE_PURPOSE (it) == NULL_TREE); | |
1366 | } | |
1367 | if (changed) | |
1368 | { | |
1369 | r = NULL_TREE; | |
9771b263 | 1370 | FOR_EACH_VEC_ELT_REVERSE (*vec, i, it) |
49bb4bbe JM |
1371 | r = tree_cons (NULL_TREE, it, r); |
1372 | } | |
1373 | else | |
1374 | r = t; | |
1375 | release_tree_vector (vec); | |
1376 | return r; | |
1377 | } | |
1378 | ||
1379 | case TREE_VEC: | |
1380 | { | |
1381 | bool changed = false; | |
9771b263 | 1382 | vec<tree, va_gc> *vec = make_tree_vector (); |
49bb4bbe | 1383 | n = TREE_VEC_LENGTH (t); |
9771b263 | 1384 | vec_safe_reserve (vec, n); |
49bb4bbe JM |
1385 | for (i = 0; i < n; ++i) |
1386 | { | |
1387 | tree op = strip_typedefs_expr (TREE_VEC_ELT (t, i)); | |
9771b263 | 1388 | vec->quick_push (op); |
49bb4bbe JM |
1389 | if (op != TREE_VEC_ELT (t, i)) |
1390 | changed = true; | |
1391 | } | |
1392 | if (changed) | |
1393 | { | |
1394 | r = copy_node (t); | |
1395 | for (i = 0; i < n; ++i) | |
9771b263 | 1396 | TREE_VEC_ELT (r, i) = (*vec)[i]; |
7349ed05 JJ |
1397 | NON_DEFAULT_TEMPLATE_ARGS_COUNT (r) |
1398 | = NON_DEFAULT_TEMPLATE_ARGS_COUNT (t); | |
49bb4bbe JM |
1399 | } |
1400 | else | |
1401 | r = t; | |
1402 | release_tree_vector (vec); | |
1403 | return r; | |
1404 | } | |
1405 | ||
1406 | case CONSTRUCTOR: | |
1407 | { | |
1408 | bool changed = false; | |
9771b263 DN |
1409 | vec<constructor_elt, va_gc> *vec |
1410 | = vec_safe_copy (CONSTRUCTOR_ELTS (t)); | |
49bb4bbe JM |
1411 | n = CONSTRUCTOR_NELTS (t); |
1412 | type = strip_typedefs (TREE_TYPE (t)); | |
1413 | for (i = 0; i < n; ++i) | |
1414 | { | |
9771b263 | 1415 | constructor_elt *e = &(*vec)[i]; |
49bb4bbe JM |
1416 | tree op = strip_typedefs_expr (e->value); |
1417 | if (op != e->value) | |
1418 | { | |
1419 | changed = true; | |
1420 | e->value = op; | |
1421 | } | |
1422 | gcc_checking_assert (e->index == strip_typedefs_expr (e->index)); | |
1423 | } | |
1424 | ||
1425 | if (!changed && type == TREE_TYPE (t)) | |
1426 | { | |
9771b263 | 1427 | vec_free (vec); |
49bb4bbe JM |
1428 | return t; |
1429 | } | |
1430 | else | |
1431 | { | |
1432 | r = copy_node (t); | |
1433 | TREE_TYPE (r) = type; | |
1434 | CONSTRUCTOR_ELTS (r) = vec; | |
1435 | return r; | |
1436 | } | |
1437 | } | |
1438 | ||
1439 | case LAMBDA_EXPR: | |
8e519a8b JM |
1440 | error ("lambda-expression in a constant expression"); |
1441 | return error_mark_node; | |
49bb4bbe JM |
1442 | |
1443 | default: | |
1444 | break; | |
1445 | } | |
1446 | ||
1447 | gcc_assert (EXPR_P (t)); | |
1448 | ||
1449 | n = TREE_OPERAND_LENGTH (t); | |
1450 | ops = XALLOCAVEC (tree, n); | |
1451 | type = TREE_TYPE (t); | |
1452 | ||
1453 | switch (code) | |
1454 | { | |
1455 | CASE_CONVERT: | |
1456 | case IMPLICIT_CONV_EXPR: | |
1457 | case DYNAMIC_CAST_EXPR: | |
1458 | case STATIC_CAST_EXPR: | |
1459 | case CONST_CAST_EXPR: | |
1460 | case REINTERPRET_CAST_EXPR: | |
1461 | case CAST_EXPR: | |
1462 | case NEW_EXPR: | |
1463 | type = strip_typedefs (type); | |
1464 | /* fallthrough */ | |
1465 | ||
1466 | default: | |
1467 | for (i = 0; i < n; ++i) | |
1468 | ops[i] = strip_typedefs_expr (TREE_OPERAND (t, i)); | |
1469 | break; | |
1470 | } | |
1471 | ||
1472 | /* If nothing changed, return t. */ | |
1473 | for (i = 0; i < n; ++i) | |
1474 | if (ops[i] != TREE_OPERAND (t, i)) | |
1475 | break; | |
1476 | if (i == n && type == TREE_TYPE (t)) | |
1477 | return t; | |
1478 | ||
1479 | r = copy_node (t); | |
1480 | TREE_TYPE (r) = type; | |
1481 | for (i = 0; i < n; ++i) | |
1482 | TREE_OPERAND (r, i) = ops[i]; | |
1483 | return r; | |
1484 | } | |
1485 | ||
48b45647 NS |
1486 | /* Makes a copy of BINFO and TYPE, which is to be inherited into a |
1487 | graph dominated by T. If BINFO is NULL, TYPE is a dependent base, | |
1488 | and we do a shallow copy. If BINFO is non-NULL, we do a deep copy. | |
1489 | VIRT indicates whether TYPE is inherited virtually or not. | |
1490 | IGO_PREV points at the previous binfo of the inheritance graph | |
1491 | order chain. The newly copied binfo's TREE_CHAIN forms this | |
1492 | ordering. | |
1493 | ||
1494 | The CLASSTYPE_VBASECLASSES vector of T is constructed in the | |
1495 | correct order. That is in the order the bases themselves should be | |
1496 | constructed in. | |
dbbf88d1 NS |
1497 | |
1498 | The BINFO_INHERITANCE of a virtual base class points to the binfo | |
48b45647 NS |
1499 | of the most derived type. ??? We could probably change this so that |
1500 | BINFO_INHERITANCE becomes synonymous with BINFO_PRIMARY, and hence | |
1501 | remove a field. They currently can only differ for primary virtual | |
1502 | virtual bases. */ | |
dbbf88d1 NS |
1503 | |
1504 | tree | |
48b45647 | 1505 | copy_binfo (tree binfo, tree type, tree t, tree *igo_prev, int virt) |
9a71c18b | 1506 | { |
48b45647 | 1507 | tree new_binfo; |
9a71c18b | 1508 | |
48b45647 NS |
1509 | if (virt) |
1510 | { | |
1511 | /* See if we've already made this virtual base. */ | |
1512 | new_binfo = binfo_for_vbase (type, t); | |
1513 | if (new_binfo) | |
1514 | return new_binfo; | |
1515 | } | |
9f63daea | 1516 | |
fa743e8c | 1517 | new_binfo = make_tree_binfo (binfo ? BINFO_N_BASE_BINFOS (binfo) : 0); |
48b45647 | 1518 | BINFO_TYPE (new_binfo) = type; |
9a71c18b | 1519 | |
48b45647 NS |
1520 | /* Chain it into the inheritance graph. */ |
1521 | TREE_CHAIN (*igo_prev) = new_binfo; | |
1522 | *igo_prev = new_binfo; | |
9f63daea | 1523 | |
05262294 | 1524 | if (binfo && !BINFO_DEPENDENT_BASE_P (binfo)) |
dfbcd65a | 1525 | { |
fa743e8c NS |
1526 | int ix; |
1527 | tree base_binfo; | |
9f63daea | 1528 | |
539ed333 | 1529 | gcc_assert (SAME_BINFO_TYPE_P (BINFO_TYPE (binfo), type)); |
9f63daea | 1530 | |
48b45647 NS |
1531 | BINFO_OFFSET (new_binfo) = BINFO_OFFSET (binfo); |
1532 | BINFO_VIRTUALS (new_binfo) = BINFO_VIRTUALS (binfo); | |
9f63daea | 1533 | |
fa743e8c NS |
1534 | /* We do not need to copy the accesses, as they are read only. */ |
1535 | BINFO_BASE_ACCESSES (new_binfo) = BINFO_BASE_ACCESSES (binfo); | |
9f63daea | 1536 | |
48b45647 | 1537 | /* Recursively copy base binfos of BINFO. */ |
fa743e8c | 1538 | for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++) |
dbbf88d1 | 1539 | { |
48b45647 | 1540 | tree new_base_binfo; |
48b45647 NS |
1541 | new_base_binfo = copy_binfo (base_binfo, BINFO_TYPE (base_binfo), |
1542 | t, igo_prev, | |
1543 | BINFO_VIRTUAL_P (base_binfo)); | |
9f63daea | 1544 | |
48b45647 NS |
1545 | if (!BINFO_INHERITANCE_CHAIN (new_base_binfo)) |
1546 | BINFO_INHERITANCE_CHAIN (new_base_binfo) = new_binfo; | |
fa743e8c | 1547 | BINFO_BASE_APPEND (new_binfo, new_base_binfo); |
dbbf88d1 | 1548 | } |
9a71c18b | 1549 | } |
48b45647 NS |
1550 | else |
1551 | BINFO_DEPENDENT_BASE_P (new_binfo) = 1; | |
9f63daea | 1552 | |
48b45647 NS |
1553 | if (virt) |
1554 | { | |
1555 | /* Push it onto the list after any virtual bases it contains | |
1556 | will have been pushed. */ | |
9771b263 | 1557 | CLASSTYPE_VBASECLASSES (t)->quick_push (new_binfo); |
48b45647 NS |
1558 | BINFO_VIRTUAL_P (new_binfo) = 1; |
1559 | BINFO_INHERITANCE_CHAIN (new_binfo) = TYPE_BINFO (t); | |
1560 | } | |
9f63daea | 1561 | |
48b45647 | 1562 | return new_binfo; |
9a71c18b | 1563 | } |
8d08fdba MS |
1564 | \f |
1565 | /* Hashing of lists so that we don't make duplicates. | |
1566 | The entry point is `list_hash_canon'. */ | |
1567 | ||
8d08fdba MS |
1568 | /* Now here is the hash table. When recording a list, it is added |
1569 | to the slot whose index is the hash code mod the table size. | |
1570 | Note that the hash table is used for several kinds of lists. | |
1571 | While all these live in the same table, they are completely independent, | |
1572 | and the hash code is computed differently for each of these. */ | |
1573 | ||
e2500fed | 1574 | static GTY ((param_is (union tree_node))) htab_t list_hash_table; |
9ccb25d5 | 1575 | |
9f63daea | 1576 | struct list_proxy |
9ccb25d5 MM |
1577 | { |
1578 | tree purpose; | |
1579 | tree value; | |
1580 | tree chain; | |
1581 | }; | |
1582 | ||
1583 | /* Compare ENTRY (an entry in the hash table) with DATA (a list_proxy | |
1584 | for a node we are thinking about adding). */ | |
1585 | ||
1586 | static int | |
b57b79f7 | 1587 | list_hash_eq (const void* entry, const void* data) |
9ccb25d5 | 1588 | { |
741ac903 KG |
1589 | const_tree const t = (const_tree) entry; |
1590 | const struct list_proxy *const proxy = (const struct list_proxy *) data; | |
9ccb25d5 MM |
1591 | |
1592 | return (TREE_VALUE (t) == proxy->value | |
1593 | && TREE_PURPOSE (t) == proxy->purpose | |
1594 | && TREE_CHAIN (t) == proxy->chain); | |
1595 | } | |
8d08fdba MS |
1596 | |
1597 | /* Compute a hash code for a list (chain of TREE_LIST nodes | |
1598 | with goodies in the TREE_PURPOSE, TREE_VALUE, and bits of the | |
1599 | TREE_COMMON slots), by adding the hash codes of the individual entries. */ | |
1600 | ||
9ccb25d5 | 1601 | static hashval_t |
b57b79f7 | 1602 | list_hash_pieces (tree purpose, tree value, tree chain) |
8d08fdba | 1603 | { |
9ccb25d5 | 1604 | hashval_t hashcode = 0; |
9f63daea | 1605 | |
37c46b43 | 1606 | if (chain) |
fd917e0d | 1607 | hashcode += TREE_HASH (chain); |
9f63daea | 1608 | |
37c46b43 | 1609 | if (value) |
fd917e0d | 1610 | hashcode += TREE_HASH (value); |
8d08fdba MS |
1611 | else |
1612 | hashcode += 1007; | |
37c46b43 | 1613 | if (purpose) |
fd917e0d | 1614 | hashcode += TREE_HASH (purpose); |
8d08fdba MS |
1615 | else |
1616 | hashcode += 1009; | |
1617 | return hashcode; | |
1618 | } | |
1619 | ||
9ccb25d5 | 1620 | /* Hash an already existing TREE_LIST. */ |
8d08fdba | 1621 | |
9ccb25d5 | 1622 | static hashval_t |
b57b79f7 | 1623 | list_hash (const void* p) |
8d08fdba | 1624 | { |
741ac903 | 1625 | const_tree const t = (const_tree) p; |
9f63daea EC |
1626 | return list_hash_pieces (TREE_PURPOSE (t), |
1627 | TREE_VALUE (t), | |
9ccb25d5 | 1628 | TREE_CHAIN (t)); |
8d08fdba MS |
1629 | } |
1630 | ||
51632249 JM |
1631 | /* Given list components PURPOSE, VALUE, AND CHAIN, return the canonical |
1632 | object for an identical list if one already exists. Otherwise, build a | |
1633 | new one, and record it as the canonical object. */ | |
8d08fdba | 1634 | |
8d08fdba | 1635 | tree |
b57b79f7 | 1636 | hash_tree_cons (tree purpose, tree value, tree chain) |
8d08fdba | 1637 | { |
a703fb38 | 1638 | int hashcode = 0; |
fad205ff | 1639 | void **slot; |
9ccb25d5 MM |
1640 | struct list_proxy proxy; |
1641 | ||
1642 | /* Hash the list node. */ | |
1643 | hashcode = list_hash_pieces (purpose, value, chain); | |
1644 | /* Create a proxy for the TREE_LIST we would like to create. We | |
1645 | don't actually create it so as to avoid creating garbage. */ | |
1646 | proxy.purpose = purpose; | |
1647 | proxy.value = value; | |
1648 | proxy.chain = chain; | |
1649 | /* See if it is already in the table. */ | |
1650 | slot = htab_find_slot_with_hash (list_hash_table, &proxy, hashcode, | |
1651 | INSERT); | |
1652 | /* If not, create a new node. */ | |
1653 | if (!*slot) | |
fad205ff | 1654 | *slot = tree_cons (purpose, value, chain); |
67f5655f | 1655 | return (tree) *slot; |
8d08fdba MS |
1656 | } |
1657 | ||
1658 | /* Constructor for hashed lists. */ | |
e92cc029 | 1659 | |
8d08fdba | 1660 | tree |
b57b79f7 | 1661 | hash_tree_chain (tree value, tree chain) |
8d08fdba | 1662 | { |
51632249 | 1663 | return hash_tree_cons (NULL_TREE, value, chain); |
8d08fdba | 1664 | } |
8d08fdba | 1665 | \f |
8d08fdba | 1666 | void |
b57b79f7 | 1667 | debug_binfo (tree elem) |
8d08fdba | 1668 | { |
fed3cef0 | 1669 | HOST_WIDE_INT n; |
8d08fdba MS |
1670 | tree virtuals; |
1671 | ||
90ff44cf KG |
1672 | fprintf (stderr, "type \"%s\", offset = " HOST_WIDE_INT_PRINT_DEC |
1673 | "\nvtable type:\n", | |
1674 | TYPE_NAME_STRING (BINFO_TYPE (elem)), | |
fed3cef0 | 1675 | TREE_INT_CST_LOW (BINFO_OFFSET (elem))); |
8d08fdba MS |
1676 | debug_tree (BINFO_TYPE (elem)); |
1677 | if (BINFO_VTABLE (elem)) | |
fed3cef0 | 1678 | fprintf (stderr, "vtable decl \"%s\"\n", |
c35cce41 | 1679 | IDENTIFIER_POINTER (DECL_NAME (get_vtbl_decl_for_binfo (elem)))); |
8d08fdba MS |
1680 | else |
1681 | fprintf (stderr, "no vtable decl yet\n"); | |
1682 | fprintf (stderr, "virtuals:\n"); | |
da3d4dfa | 1683 | virtuals = BINFO_VIRTUALS (elem); |
1f84ec23 | 1684 | n = 0; |
f30432d7 | 1685 | |
8d08fdba MS |
1686 | while (virtuals) |
1687 | { | |
83f2ccf4 | 1688 | tree fndecl = TREE_VALUE (virtuals); |
71e89f27 | 1689 | fprintf (stderr, "%s [%ld =? %ld]\n", |
8d08fdba | 1690 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)), |
71e89f27 | 1691 | (long) n, (long) TREE_INT_CST_LOW (DECL_VINDEX (fndecl))); |
f30432d7 | 1692 | ++n; |
8d08fdba | 1693 | virtuals = TREE_CHAIN (virtuals); |
8d08fdba MS |
1694 | } |
1695 | } | |
1696 | ||
02ed62dd MM |
1697 | /* Build a representation for the qualified name SCOPE::NAME. TYPE is |
1698 | the type of the result expression, if known, or NULL_TREE if the | |
1699 | resulting expression is type-dependent. If TEMPLATE_P is true, | |
1700 | NAME is known to be a template because the user explicitly used the | |
3db45ab5 | 1701 | "template" keyword after the "::". |
02ed62dd MM |
1702 | |
1703 | All SCOPE_REFs should be built by use of this function. */ | |
1704 | ||
1705 | tree | |
1706 | build_qualified_name (tree type, tree scope, tree name, bool template_p) | |
1707 | { | |
1708 | tree t; | |
36569397 MM |
1709 | if (type == error_mark_node |
1710 | || scope == error_mark_node | |
1711 | || name == error_mark_node) | |
1712 | return error_mark_node; | |
02ed62dd MM |
1713 | t = build2 (SCOPE_REF, type, scope, name); |
1714 | QUALIFIED_NAME_IS_TEMPLATE (t) = template_p; | |
d816a3ba | 1715 | PTRMEM_OK_P (t) = true; |
7097b3ac JM |
1716 | if (type) |
1717 | t = convert_from_reference (t); | |
02ed62dd MM |
1718 | return t; |
1719 | } | |
1720 | ||
2eed8e37 BK |
1721 | /* Like check_qualified_type, but also check ref-qualifier and exception |
1722 | specification. */ | |
1723 | ||
1724 | static bool | |
1725 | cp_check_qualified_type (const_tree cand, const_tree base, int type_quals, | |
1726 | cp_ref_qualifier rqual, tree raises) | |
1727 | { | |
1728 | return (check_qualified_type (cand, base, type_quals) | |
1729 | && comp_except_specs (raises, TYPE_RAISES_EXCEPTIONS (cand), | |
1730 | ce_exact) | |
1731 | && type_memfn_rqual (cand) == rqual); | |
1732 | } | |
1733 | ||
1734 | /* Build the FUNCTION_TYPE or METHOD_TYPE with the ref-qualifier RQUAL. */ | |
1735 | ||
1736 | tree | |
1737 | build_ref_qualified_type (tree type, cp_ref_qualifier rqual) | |
1738 | { | |
1739 | tree t; | |
1740 | ||
1741 | if (rqual == type_memfn_rqual (type)) | |
1742 | return type; | |
1743 | ||
1744 | int type_quals = TYPE_QUALS (type); | |
1745 | tree raises = TYPE_RAISES_EXCEPTIONS (type); | |
1746 | for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) | |
1747 | if (cp_check_qualified_type (t, type, type_quals, rqual, raises)) | |
1748 | return t; | |
1749 | ||
1750 | t = build_variant_type_copy (type); | |
1751 | switch (rqual) | |
1752 | { | |
1753 | case REF_QUAL_RVALUE: | |
1754 | FUNCTION_RVALUE_QUALIFIED (t) = 1; | |
1755 | /* Intentional fall through */ | |
1756 | case REF_QUAL_LVALUE: | |
1757 | FUNCTION_REF_QUALIFIED (t) = 1; | |
1758 | break; | |
1759 | default: | |
1760 | FUNCTION_REF_QUALIFIED (t) = 0; | |
1761 | break; | |
1762 | } | |
1763 | ||
1764 | if (TYPE_STRUCTURAL_EQUALITY_P (type)) | |
1765 | /* Propagate structural equality. */ | |
1766 | SET_TYPE_STRUCTURAL_EQUALITY (t); | |
1767 | else if (TYPE_CANONICAL (type) != type) | |
1768 | /* Build the underlying canonical type, since it is different | |
1769 | from TYPE. */ | |
1770 | TYPE_CANONICAL (t) = build_ref_qualified_type (TYPE_CANONICAL (type), | |
1771 | rqual); | |
1772 | else | |
1773 | /* T is its own canonical type. */ | |
1774 | TYPE_CANONICAL (t) = t; | |
1775 | ||
1776 | return t; | |
1777 | } | |
1778 | ||
3b426391 | 1779 | /* Returns nonzero if X is an expression for a (possibly overloaded) |
eff3a276 MM |
1780 | function. If "f" is a function or function template, "f", "c->f", |
1781 | "c.f", "C::f", and "f<int>" will all be considered possibly | |
1782 | overloaded functions. Returns 2 if the function is actually | |
b9704fc5 | 1783 | overloaded, i.e., if it is impossible to know the type of the |
eff3a276 MM |
1784 | function without performing overload resolution. */ |
1785 | ||
8d08fdba | 1786 | int |
b57b79f7 | 1787 | is_overloaded_fn (tree x) |
8d08fdba | 1788 | { |
4bb0968f | 1789 | /* A baselink is also considered an overloaded function. */ |
ccbe00a4 JM |
1790 | if (TREE_CODE (x) == OFFSET_REF |
1791 | || TREE_CODE (x) == COMPONENT_REF) | |
05e0b2f4 | 1792 | x = TREE_OPERAND (x, 1); |
4bb0968f | 1793 | if (BASELINK_P (x)) |
da15dae6 | 1794 | x = BASELINK_FUNCTIONS (x); |
d095e03c JM |
1795 | if (TREE_CODE (x) == TEMPLATE_ID_EXPR) |
1796 | x = TREE_OPERAND (x, 0); | |
1797 | if (DECL_FUNCTION_TEMPLATE_P (OVL_CURRENT (x)) | |
eff3a276 MM |
1798 | || (TREE_CODE (x) == OVERLOAD && OVL_CHAIN (x))) |
1799 | return 2; | |
1800 | return (TREE_CODE (x) == FUNCTION_DECL | |
1801 | || TREE_CODE (x) == OVERLOAD); | |
8d08fdba MS |
1802 | } |
1803 | ||
f7d605ac JM |
1804 | /* X is the CALL_EXPR_FN of a CALL_EXPR. If X represents a dependent name |
1805 | (14.6.2), return the IDENTIFIER_NODE for that name. Otherwise, return | |
1806 | NULL_TREE. */ | |
1807 | ||
4b6aaa99 | 1808 | tree |
f7d605ac JM |
1809 | dependent_name (tree x) |
1810 | { | |
9dc6f476 | 1811 | if (identifier_p (x)) |
f7d605ac JM |
1812 | return x; |
1813 | if (TREE_CODE (x) != COMPONENT_REF | |
d54ce1df JM |
1814 | && TREE_CODE (x) != OFFSET_REF |
1815 | && TREE_CODE (x) != BASELINK | |
f7d605ac JM |
1816 | && is_overloaded_fn (x)) |
1817 | return DECL_NAME (get_first_fn (x)); | |
1818 | return NULL_TREE; | |
1819 | } | |
1820 | ||
eff3a276 MM |
1821 | /* Returns true iff X is an expression for an overloaded function |
1822 | whose type cannot be known without performing overload | |
1823 | resolution. */ | |
1824 | ||
1825 | bool | |
b57b79f7 | 1826 | really_overloaded_fn (tree x) |
9f63daea | 1827 | { |
eff3a276 | 1828 | return is_overloaded_fn (x) == 2; |
8926095f MS |
1829 | } |
1830 | ||
8d08fdba | 1831 | tree |
294e855f | 1832 | get_fns (tree from) |
8d08fdba | 1833 | { |
50bc768d | 1834 | gcc_assert (is_overloaded_fn (from)); |
c6002625 | 1835 | /* A baselink is also considered an overloaded function. */ |
7e361ae6 JM |
1836 | if (TREE_CODE (from) == OFFSET_REF |
1837 | || TREE_CODE (from) == COMPONENT_REF) | |
ccbe00a4 | 1838 | from = TREE_OPERAND (from, 1); |
4bb0968f | 1839 | if (BASELINK_P (from)) |
da15dae6 | 1840 | from = BASELINK_FUNCTIONS (from); |
d095e03c JM |
1841 | if (TREE_CODE (from) == TEMPLATE_ID_EXPR) |
1842 | from = TREE_OPERAND (from, 0); | |
294e855f JM |
1843 | return from; |
1844 | } | |
1845 | ||
1846 | tree | |
1847 | get_first_fn (tree from) | |
1848 | { | |
1849 | return OVL_CURRENT (get_fns (from)); | |
2c73f9f5 | 1850 | } |
8d08fdba | 1851 | |
c6002625 | 1852 | /* Return a new OVL node, concatenating it with the old one. */ |
2c73f9f5 ML |
1853 | |
1854 | tree | |
b57b79f7 | 1855 | ovl_cons (tree decl, tree chain) |
2c73f9f5 ML |
1856 | { |
1857 | tree result = make_node (OVERLOAD); | |
1858 | TREE_TYPE (result) = unknown_type_node; | |
1859 | OVL_FUNCTION (result) = decl; | |
1860 | TREE_CHAIN (result) = chain; | |
9f63daea | 1861 | |
2c73f9f5 ML |
1862 | return result; |
1863 | } | |
1864 | ||
2c73f9f5 ML |
1865 | /* Build a new overloaded function. If this is the first one, |
1866 | just return it; otherwise, ovl_cons the _DECLs */ | |
1867 | ||
1868 | tree | |
b57b79f7 | 1869 | build_overload (tree decl, tree chain) |
2c73f9f5 | 1870 | { |
161c12b0 | 1871 | if (! chain && TREE_CODE (decl) != TEMPLATE_DECL) |
2c73f9f5 | 1872 | return decl; |
2c73f9f5 | 1873 | return ovl_cons (decl, chain); |
73452ce7 DS |
1874 | } |
1875 | ||
aef3a6b2 JM |
1876 | /* Return the scope where the overloaded functions OVL were found. */ |
1877 | ||
1878 | tree | |
1879 | ovl_scope (tree ovl) | |
1880 | { | |
1881 | if (TREE_CODE (ovl) == OFFSET_REF | |
1882 | || TREE_CODE (ovl) == COMPONENT_REF) | |
1883 | ovl = TREE_OPERAND (ovl, 1); | |
1884 | if (TREE_CODE (ovl) == BASELINK) | |
1885 | return BINFO_TYPE (BASELINK_BINFO (ovl)); | |
1886 | if (TREE_CODE (ovl) == TEMPLATE_ID_EXPR) | |
1887 | ovl = TREE_OPERAND (ovl, 0); | |
1888 | /* Skip using-declarations. */ | |
1889 | while (TREE_CODE (ovl) == OVERLOAD && OVL_USED (ovl) && OVL_CHAIN (ovl)) | |
1890 | ovl = OVL_CHAIN (ovl); | |
1891 | return CP_DECL_CONTEXT (OVL_CURRENT (ovl)); | |
1892 | } | |
1893 | ||
73452ce7 DS |
1894 | /* Return TRUE if FN is a non-static member function, FALSE otherwise. |
1895 | This function looks into BASELINK and OVERLOAD nodes. */ | |
1896 | ||
1897 | bool | |
1898 | non_static_member_function_p (tree fn) | |
1899 | { | |
1900 | if (fn == NULL_TREE) | |
1901 | return false; | |
1902 | ||
1903 | if (is_overloaded_fn (fn)) | |
1904 | fn = get_first_fn (fn); | |
1905 | ||
1906 | return (DECL_P (fn) | |
1907 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (fn)); | |
2c73f9f5 ML |
1908 | } |
1909 | ||
8d08fdba MS |
1910 | \f |
1911 | #define PRINT_RING_SIZE 4 | |
1912 | ||
f41c4af3 JM |
1913 | static const char * |
1914 | cxx_printable_name_internal (tree decl, int v, bool translate) | |
8d08fdba | 1915 | { |
1bde0042 | 1916 | static unsigned int uid_ring[PRINT_RING_SIZE]; |
8d08fdba | 1917 | static char *print_ring[PRINT_RING_SIZE]; |
f41c4af3 | 1918 | static bool trans_ring[PRINT_RING_SIZE]; |
8d08fdba MS |
1919 | static int ring_counter; |
1920 | int i; | |
1921 | ||
1922 | /* Only cache functions. */ | |
2ba25f50 MS |
1923 | if (v < 2 |
1924 | || TREE_CODE (decl) != FUNCTION_DECL | |
8d08fdba | 1925 | || DECL_LANG_SPECIFIC (decl) == 0) |
f41c4af3 | 1926 | return lang_decl_name (decl, v, translate); |
8d08fdba MS |
1927 | |
1928 | /* See if this print name is lying around. */ | |
1929 | for (i = 0; i < PRINT_RING_SIZE; i++) | |
f41c4af3 | 1930 | if (uid_ring[i] == DECL_UID (decl) && translate == trans_ring[i]) |
8d08fdba MS |
1931 | /* yes, so return it. */ |
1932 | return print_ring[i]; | |
1933 | ||
1934 | if (++ring_counter == PRINT_RING_SIZE) | |
1935 | ring_counter = 0; | |
1936 | ||
1937 | if (current_function_decl != NULL_TREE) | |
1938 | { | |
8fa6fa79 JM |
1939 | /* There may be both translated and untranslated versions of the |
1940 | name cached. */ | |
1941 | for (i = 0; i < 2; i++) | |
1942 | { | |
1943 | if (uid_ring[ring_counter] == DECL_UID (current_function_decl)) | |
1944 | ring_counter += 1; | |
1945 | if (ring_counter == PRINT_RING_SIZE) | |
1946 | ring_counter = 0; | |
1947 | } | |
1bde0042 | 1948 | gcc_assert (uid_ring[ring_counter] != DECL_UID (current_function_decl)); |
8d08fdba MS |
1949 | } |
1950 | ||
04695783 | 1951 | free (print_ring[ring_counter]); |
8d08fdba | 1952 | |
f41c4af3 | 1953 | print_ring[ring_counter] = xstrdup (lang_decl_name (decl, v, translate)); |
1bde0042 | 1954 | uid_ring[ring_counter] = DECL_UID (decl); |
f41c4af3 | 1955 | trans_ring[ring_counter] = translate; |
8d08fdba MS |
1956 | return print_ring[ring_counter]; |
1957 | } | |
f41c4af3 JM |
1958 | |
1959 | const char * | |
1960 | cxx_printable_name (tree decl, int v) | |
1961 | { | |
1962 | return cxx_printable_name_internal (decl, v, false); | |
1963 | } | |
1964 | ||
1965 | const char * | |
1966 | cxx_printable_name_translate (tree decl, int v) | |
1967 | { | |
1968 | return cxx_printable_name_internal (decl, v, true); | |
1969 | } | |
8d08fdba | 1970 | \f |
f30432d7 | 1971 | /* Build the FUNCTION_TYPE or METHOD_TYPE which may throw exceptions |
8d08fdba | 1972 | listed in RAISES. */ |
e92cc029 | 1973 | |
8d08fdba | 1974 | tree |
b57b79f7 | 1975 | build_exception_variant (tree type, tree raises) |
8d08fdba | 1976 | { |
3a55fb4c JM |
1977 | tree v; |
1978 | int type_quals; | |
8d08fdba | 1979 | |
3a55fb4c JM |
1980 | if (comp_except_specs (raises, TYPE_RAISES_EXCEPTIONS (type), ce_exact)) |
1981 | return type; | |
1982 | ||
1983 | type_quals = TYPE_QUALS (type); | |
2eed8e37 | 1984 | cp_ref_qualifier rqual = type_memfn_rqual (type); |
3a55fb4c | 1985 | for (v = TYPE_MAIN_VARIANT (type); v; v = TYPE_NEXT_VARIANT (v)) |
2eed8e37 | 1986 | if (cp_check_qualified_type (v, type, type_quals, rqual, raises)) |
4cc1d462 | 1987 | return v; |
8d08fdba MS |
1988 | |
1989 | /* Need to build a new variant. */ | |
8dd16ecc | 1990 | v = build_variant_type_copy (type); |
8d08fdba MS |
1991 | TYPE_RAISES_EXCEPTIONS (v) = raises; |
1992 | return v; | |
1993 | } | |
1994 | ||
dac65501 KL |
1995 | /* Given a TEMPLATE_TEMPLATE_PARM node T, create a new |
1996 | BOUND_TEMPLATE_TEMPLATE_PARM bound with NEWARGS as its template | |
1899c3a4 | 1997 | arguments. */ |
73b0fce8 KL |
1998 | |
1999 | tree | |
b57b79f7 | 2000 | bind_template_template_parm (tree t, tree newargs) |
73b0fce8 | 2001 | { |
1899c3a4 | 2002 | tree decl = TYPE_NAME (t); |
6b9b6b15 JM |
2003 | tree t2; |
2004 | ||
9e1e64ec | 2005 | t2 = cxx_make_type (BOUND_TEMPLATE_TEMPLATE_PARM); |
c2255bc4 AH |
2006 | decl = build_decl (input_location, |
2007 | TYPE_DECL, DECL_NAME (decl), NULL_TREE); | |
1899c3a4 | 2008 | |
dac65501 KL |
2009 | /* These nodes have to be created to reflect new TYPE_DECL and template |
2010 | arguments. */ | |
2011 | TEMPLATE_TYPE_PARM_INDEX (t2) = copy_node (TEMPLATE_TYPE_PARM_INDEX (t)); | |
2012 | TEMPLATE_PARM_DECL (TEMPLATE_TYPE_PARM_INDEX (t2)) = decl; | |
2013 | TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2) | |
aa373032 | 2014 | = build_template_info (TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL (t), newargs); |
6b9b6b15 | 2015 | |
1899c3a4 KL |
2016 | TREE_TYPE (decl) = t2; |
2017 | TYPE_NAME (t2) = decl; | |
2018 | TYPE_STUB_DECL (t2) = decl; | |
dac65501 | 2019 | TYPE_SIZE (t2) = 0; |
06d40de8 | 2020 | SET_TYPE_STRUCTURAL_EQUALITY (t2); |
73b0fce8 | 2021 | |
73b0fce8 KL |
2022 | return t2; |
2023 | } | |
2024 | ||
bf3428d0 | 2025 | /* Called from count_trees via walk_tree. */ |
297a5329 JM |
2026 | |
2027 | static tree | |
44de5aeb | 2028 | count_trees_r (tree *tp, int *walk_subtrees, void *data) |
297a5329 | 2029 | { |
44de5aeb RK |
2030 | ++*((int *) data); |
2031 | ||
2032 | if (TYPE_P (*tp)) | |
2033 | *walk_subtrees = 0; | |
2034 | ||
297a5329 JM |
2035 | return NULL_TREE; |
2036 | } | |
2037 | ||
2038 | /* Debugging function for measuring the rough complexity of a tree | |
2039 | representation. */ | |
2040 | ||
2041 | int | |
b57b79f7 | 2042 | count_trees (tree t) |
297a5329 | 2043 | { |
bf3428d0 | 2044 | int n_trees = 0; |
14588106 | 2045 | cp_walk_tree_without_duplicates (&t, count_trees_r, &n_trees); |
297a5329 | 2046 | return n_trees; |
9f63daea | 2047 | } |
297a5329 | 2048 | |
b2244c65 MM |
2049 | /* Called from verify_stmt_tree via walk_tree. */ |
2050 | ||
2051 | static tree | |
12308bc6 | 2052 | verify_stmt_tree_r (tree* tp, int * /*walk_subtrees*/, void* data) |
b2244c65 MM |
2053 | { |
2054 | tree t = *tp; | |
703c8606 LC |
2055 | hash_table <pointer_hash <tree_node> > *statements |
2056 | = static_cast <hash_table <pointer_hash <tree_node> > *> (data); | |
2057 | tree_node **slot; | |
b2244c65 | 2058 | |
009ed910 | 2059 | if (!STATEMENT_CODE_P (TREE_CODE (t))) |
b2244c65 MM |
2060 | return NULL_TREE; |
2061 | ||
2062 | /* If this statement is already present in the hash table, then | |
2063 | there is a circularity in the statement tree. */ | |
703c8606 | 2064 | gcc_assert (!statements->find (t)); |
9f63daea | 2065 | |
703c8606 | 2066 | slot = statements->find_slot (t, INSERT); |
b2244c65 MM |
2067 | *slot = t; |
2068 | ||
2069 | return NULL_TREE; | |
2070 | } | |
2071 | ||
2072 | /* Debugging function to check that the statement T has not been | |
2073 | corrupted. For now, this function simply checks that T contains no | |
2074 | circularities. */ | |
2075 | ||
2076 | void | |
b57b79f7 | 2077 | verify_stmt_tree (tree t) |
b2244c65 | 2078 | { |
703c8606 LC |
2079 | hash_table <pointer_hash <tree_node> > statements; |
2080 | statements.create (37); | |
14588106 | 2081 | cp_walk_tree (&t, verify_stmt_tree_r, &statements, NULL); |
703c8606 | 2082 | statements.dispose (); |
b2244c65 MM |
2083 | } |
2084 | ||
50a6dbd7 | 2085 | /* Check if the type T depends on a type with no linkage and if so, return |
4684cd27 | 2086 | it. If RELAXED_P then do not consider a class type declared within |
ecc607fc | 2087 | a vague-linkage function to have no linkage. */ |
50a6dbd7 JM |
2088 | |
2089 | tree | |
4684cd27 | 2090 | no_linkage_check (tree t, bool relaxed_p) |
50a6dbd7 | 2091 | { |
caf43ca4 MM |
2092 | tree r; |
2093 | ||
2adeacc9 MM |
2094 | /* There's no point in checking linkage on template functions; we |
2095 | can't know their complete types. */ | |
2096 | if (processing_template_decl) | |
2097 | return NULL_TREE; | |
2098 | ||
caf43ca4 MM |
2099 | switch (TREE_CODE (t)) |
2100 | { | |
2101 | case RECORD_TYPE: | |
2102 | if (TYPE_PTRMEMFUNC_P (t)) | |
2103 | goto ptrmem; | |
e6d92cec | 2104 | /* Lambda types that don't have mangling scope have no linkage. We |
c7335680 | 2105 | check CLASSTYPE_LAMBDA_EXPR for error_mark_node because |
e6d92cec JM |
2106 | when we get here from pushtag none of the lambda information is |
2107 | set up yet, so we want to assume that the lambda has linkage and | |
2108 | fix it up later if not. */ | |
2109 | if (CLASSTYPE_LAMBDA_EXPR (t) | |
c7335680 | 2110 | && CLASSTYPE_LAMBDA_EXPR (t) != error_mark_node |
e6d92cec JM |
2111 | && LAMBDA_TYPE_EXTRA_SCOPE (t) == NULL_TREE) |
2112 | return t; | |
caf43ca4 MM |
2113 | /* Fall through. */ |
2114 | case UNION_TYPE: | |
2115 | if (!CLASS_TYPE_P (t)) | |
2116 | return NULL_TREE; | |
2117 | /* Fall through. */ | |
2118 | case ENUMERAL_TYPE: | |
ecc607fc | 2119 | /* Only treat anonymous types as having no linkage if they're at |
2f59d9e0 | 2120 | namespace scope. This is core issue 966. */ |
ecc607fc | 2121 | if (TYPE_ANONYMOUS_P (t) && TYPE_NAMESPACE_SCOPE_P (t)) |
caf43ca4 | 2122 | return t; |
ecc607fc | 2123 | |
e6d92cec | 2124 | for (r = CP_TYPE_CONTEXT (t); ; ) |
ecc607fc | 2125 | { |
e6d92cec JM |
2126 | /* If we're a nested type of a !TREE_PUBLIC class, we might not |
2127 | have linkage, or we might just be in an anonymous namespace. | |
2128 | If we're in a TREE_PUBLIC class, we have linkage. */ | |
2129 | if (TYPE_P (r) && !TREE_PUBLIC (TYPE_NAME (r))) | |
2130 | return no_linkage_check (TYPE_CONTEXT (t), relaxed_p); | |
2131 | else if (TREE_CODE (r) == FUNCTION_DECL) | |
2132 | { | |
d6dcdbd5 | 2133 | if (!relaxed_p || !vague_linkage_p (r)) |
e6d92cec JM |
2134 | return t; |
2135 | else | |
2136 | r = CP_DECL_CONTEXT (r); | |
2137 | } | |
ecc607fc | 2138 | else |
e6d92cec | 2139 | break; |
ecc607fc JM |
2140 | } |
2141 | ||
caf43ca4 MM |
2142 | return NULL_TREE; |
2143 | ||
2144 | case ARRAY_TYPE: | |
2145 | case POINTER_TYPE: | |
2146 | case REFERENCE_TYPE: | |
4684cd27 | 2147 | return no_linkage_check (TREE_TYPE (t), relaxed_p); |
caf43ca4 MM |
2148 | |
2149 | case OFFSET_TYPE: | |
2150 | ptrmem: | |
4684cd27 MM |
2151 | r = no_linkage_check (TYPE_PTRMEM_POINTED_TO_TYPE (t), |
2152 | relaxed_p); | |
caf43ca4 MM |
2153 | if (r) |
2154 | return r; | |
4684cd27 | 2155 | return no_linkage_check (TYPE_PTRMEM_CLASS_TYPE (t), relaxed_p); |
caf43ca4 MM |
2156 | |
2157 | case METHOD_TYPE: | |
4684cd27 | 2158 | r = no_linkage_check (TYPE_METHOD_BASETYPE (t), relaxed_p); |
caf43ca4 MM |
2159 | if (r) |
2160 | return r; | |
2161 | /* Fall through. */ | |
2162 | case FUNCTION_TYPE: | |
2163 | { | |
2164 | tree parm; | |
9f63daea EC |
2165 | for (parm = TYPE_ARG_TYPES (t); |
2166 | parm && parm != void_list_node; | |
caf43ca4 MM |
2167 | parm = TREE_CHAIN (parm)) |
2168 | { | |
4684cd27 | 2169 | r = no_linkage_check (TREE_VALUE (parm), relaxed_p); |
caf43ca4 MM |
2170 | if (r) |
2171 | return r; | |
2172 | } | |
4684cd27 | 2173 | return no_linkage_check (TREE_TYPE (t), relaxed_p); |
caf43ca4 MM |
2174 | } |
2175 | ||
2176 | default: | |
2177 | return NULL_TREE; | |
2178 | } | |
50a6dbd7 JM |
2179 | } |
2180 | ||
5566b478 | 2181 | extern int depth_reached; |
5566b478 | 2182 | |
8d08fdba | 2183 | void |
b57b79f7 | 2184 | cxx_print_statistics (void) |
8d08fdba | 2185 | { |
8d08fdba MS |
2186 | print_search_statistics (); |
2187 | print_class_statistics (); | |
7dcfe861 | 2188 | print_template_statistics (); |
7aa6d18a SB |
2189 | if (GATHER_STATISTICS) |
2190 | fprintf (stderr, "maximum template instantiation depth reached: %d\n", | |
2191 | depth_reached); | |
8d08fdba MS |
2192 | } |
2193 | ||
e92cc029 MS |
2194 | /* Return, as an INTEGER_CST node, the number of elements for TYPE |
2195 | (which is an ARRAY_TYPE). This counts only elements of the top | |
2196 | array. */ | |
8d08fdba MS |
2197 | |
2198 | tree | |
b57b79f7 | 2199 | array_type_nelts_top (tree type) |
8d08fdba | 2200 | { |
db3927fb AH |
2201 | return fold_build2_loc (input_location, |
2202 | PLUS_EXPR, sizetype, | |
7866705a | 2203 | array_type_nelts (type), |
701e903a | 2204 | size_one_node); |
8d08fdba MS |
2205 | } |
2206 | ||
e92cc029 MS |
2207 | /* Return, as an INTEGER_CST node, the number of elements for TYPE |
2208 | (which is an ARRAY_TYPE). This one is a recursive count of all | |
2209 | ARRAY_TYPEs that are clumped together. */ | |
8d08fdba MS |
2210 | |
2211 | tree | |
b57b79f7 | 2212 | array_type_nelts_total (tree type) |
8d08fdba MS |
2213 | { |
2214 | tree sz = array_type_nelts_top (type); | |
2215 | type = TREE_TYPE (type); | |
2216 | while (TREE_CODE (type) == ARRAY_TYPE) | |
2217 | { | |
2218 | tree n = array_type_nelts_top (type); | |
db3927fb AH |
2219 | sz = fold_build2_loc (input_location, |
2220 | MULT_EXPR, sizetype, sz, n); | |
8d08fdba MS |
2221 | type = TREE_TYPE (type); |
2222 | } | |
2223 | return sz; | |
2224 | } | |
878cd289 | 2225 | |
b3ab27f3 MM |
2226 | /* Called from break_out_target_exprs via mapcar. */ |
2227 | ||
2228 | static tree | |
b57b79f7 | 2229 | bot_manip (tree* tp, int* walk_subtrees, void* data) |
878cd289 | 2230 | { |
8dfaeb63 MM |
2231 | splay_tree target_remap = ((splay_tree) data); |
2232 | tree t = *tp; | |
2233 | ||
edb7c512 | 2234 | if (!TYPE_P (t) && TREE_CONSTANT (t) && !TREE_SIDE_EFFECTS (t)) |
8dfaeb63 | 2235 | { |
a4d25b44 JM |
2236 | /* There can't be any TARGET_EXPRs or their slot variables below this |
2237 | point. But we must make a copy, in case subsequent processing | |
2238 | alters any part of it. For example, during gimplification a cast | |
2239 | of the form (T) &X::f (where "f" is a member function) will lead | |
2240 | to replacing the PTRMEM_CST for &X::f with a VAR_DECL. */ | |
8dfaeb63 | 2241 | *walk_subtrees = 0; |
a4d25b44 | 2242 | *tp = unshare_expr (t); |
8dfaeb63 MM |
2243 | return NULL_TREE; |
2244 | } | |
495d26d6 | 2245 | if (TREE_CODE (t) == TARGET_EXPR) |
73aad9b9 | 2246 | { |
b3ab27f3 MM |
2247 | tree u; |
2248 | ||
02531345 | 2249 | if (TREE_CODE (TREE_OPERAND (t, 1)) == AGGR_INIT_EXPR) |
875bcfdb JM |
2250 | { |
2251 | u = build_cplus_new (TREE_TYPE (t), TREE_OPERAND (t, 1), | |
2252 | tf_warning_or_error); | |
2253 | if (AGGR_INIT_ZERO_FIRST (TREE_OPERAND (t, 1))) | |
2254 | AGGR_INIT_ZERO_FIRST (TREE_OPERAND (u, 1)) = true; | |
2255 | } | |
9f63daea | 2256 | else |
574cfaa4 JM |
2257 | u = build_target_expr_with_type (TREE_OPERAND (t, 1), TREE_TYPE (t), |
2258 | tf_warning_or_error); | |
b3ab27f3 | 2259 | |
e08cc018 JM |
2260 | TARGET_EXPR_IMPLICIT_P (u) = TARGET_EXPR_IMPLICIT_P (t); |
2261 | TARGET_EXPR_LIST_INIT_P (u) = TARGET_EXPR_LIST_INIT_P (t); | |
2262 | TARGET_EXPR_DIRECT_INIT_P (u) = TARGET_EXPR_DIRECT_INIT_P (t); | |
2263 | ||
b3ab27f3 | 2264 | /* Map the old variable to the new one. */ |
9f63daea EC |
2265 | splay_tree_insert (target_remap, |
2266 | (splay_tree_key) TREE_OPERAND (t, 0), | |
b3ab27f3 | 2267 | (splay_tree_value) TREE_OPERAND (u, 0)); |
8dfaeb63 | 2268 | |
7efc22ea JM |
2269 | TREE_OPERAND (u, 1) = break_out_target_exprs (TREE_OPERAND (u, 1)); |
2270 | ||
8dfaeb63 MM |
2271 | /* Replace the old expression with the new version. */ |
2272 | *tp = u; | |
2273 | /* We don't have to go below this point; the recursive call to | |
2274 | break_out_target_exprs will have handled anything below this | |
2275 | point. */ | |
2276 | *walk_subtrees = 0; | |
2277 | return NULL_TREE; | |
73aad9b9 | 2278 | } |
73aad9b9 | 2279 | |
8dfaeb63 | 2280 | /* Make a copy of this node. */ |
5507a6c3 JM |
2281 | t = copy_tree_r (tp, walk_subtrees, NULL); |
2282 | if (TREE_CODE (*tp) == CALL_EXPR) | |
2283 | set_flags_from_callee (*tp); | |
2284 | return t; | |
878cd289 | 2285 | } |
9f63daea | 2286 | |
8dfaeb63 MM |
2287 | /* Replace all remapped VAR_DECLs in T with their new equivalents. |
2288 | DATA is really a splay-tree mapping old variables to new | |
2289 | variables. */ | |
b3ab27f3 MM |
2290 | |
2291 | static tree | |
12308bc6 | 2292 | bot_replace (tree* t, int* /*walk_subtrees*/, void* data) |
b3ab27f3 | 2293 | { |
8dfaeb63 MM |
2294 | splay_tree target_remap = ((splay_tree) data); |
2295 | ||
5a6ccc94 | 2296 | if (VAR_P (*t)) |
b3ab27f3 MM |
2297 | { |
2298 | splay_tree_node n = splay_tree_lookup (target_remap, | |
2299 | (splay_tree_key) *t); | |
2300 | if (n) | |
2301 | *t = (tree) n->value; | |
2302 | } | |
382346e5 JM |
2303 | else if (TREE_CODE (*t) == PARM_DECL |
2304 | && DECL_NAME (*t) == this_identifier) | |
2305 | { | |
2306 | /* In an NSDMI we need to replace the 'this' parameter we used for | |
2307 | parsing with the real one for this function. */ | |
2308 | *t = current_class_ptr; | |
2309 | } | |
c65b0607 JM |
2310 | else if (TREE_CODE (*t) == CONVERT_EXPR |
2311 | && CONVERT_EXPR_VBASE_PATH (*t)) | |
2312 | { | |
2313 | /* In an NSDMI build_base_path defers building conversions to virtual | |
2314 | bases, and we handle it here. */ | |
2315 | tree basetype = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (*t))); | |
9771b263 | 2316 | vec<tree, va_gc> *vbases = CLASSTYPE_VBASECLASSES (current_class_type); |
c65b0607 | 2317 | int i; tree binfo; |
9771b263 | 2318 | FOR_EACH_VEC_SAFE_ELT (vbases, i, binfo) |
c65b0607 JM |
2319 | if (BINFO_TYPE (binfo) == basetype) |
2320 | break; | |
2321 | *t = build_base_path (PLUS_EXPR, TREE_OPERAND (*t, 0), binfo, true, | |
2322 | tf_warning_or_error); | |
2323 | } | |
b3ab27f3 MM |
2324 | |
2325 | return NULL_TREE; | |
2326 | } | |
9f63daea | 2327 | |
8dfaeb63 MM |
2328 | /* When we parse a default argument expression, we may create |
2329 | temporary variables via TARGET_EXPRs. When we actually use the | |
a4d25b44 JM |
2330 | default-argument expression, we make a copy of the expression |
2331 | and replace the temporaries with appropriate local versions. */ | |
e92cc029 | 2332 | |
878cd289 | 2333 | tree |
b57b79f7 | 2334 | break_out_target_exprs (tree t) |
878cd289 | 2335 | { |
8dfaeb63 MM |
2336 | static int target_remap_count; |
2337 | static splay_tree target_remap; | |
2338 | ||
b3ab27f3 | 2339 | if (!target_remap_count++) |
9f63daea EC |
2340 | target_remap = splay_tree_new (splay_tree_compare_pointers, |
2341 | /*splay_tree_delete_key_fn=*/NULL, | |
b3ab27f3 | 2342 | /*splay_tree_delete_value_fn=*/NULL); |
14588106 RG |
2343 | cp_walk_tree (&t, bot_manip, target_remap, NULL); |
2344 | cp_walk_tree (&t, bot_replace, target_remap, NULL); | |
b3ab27f3 MM |
2345 | |
2346 | if (!--target_remap_count) | |
2347 | { | |
2348 | splay_tree_delete (target_remap); | |
2349 | target_remap = NULL; | |
2350 | } | |
2351 | ||
2352 | return t; | |
878cd289 | 2353 | } |
f30432d7 | 2354 | |
8e1daa34 NS |
2355 | /* Similar to `build_nt', but for template definitions of dependent |
2356 | expressions */ | |
5566b478 MS |
2357 | |
2358 | tree | |
f330f599 | 2359 | build_min_nt_loc (location_t loc, enum tree_code code, ...) |
5566b478 | 2360 | { |
926ce8bd KH |
2361 | tree t; |
2362 | int length; | |
2363 | int i; | |
e34d07f2 | 2364 | va_list p; |
5566b478 | 2365 | |
5039610b SL |
2366 | gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp); |
2367 | ||
e34d07f2 | 2368 | va_start (p, code); |
5566b478 | 2369 | |
5566b478 | 2370 | t = make_node (code); |
f330f599 | 2371 | SET_EXPR_LOCATION (t, loc); |
8d5e6e25 | 2372 | length = TREE_CODE_LENGTH (code); |
5566b478 MS |
2373 | |
2374 | for (i = 0; i < length; i++) | |
2375 | { | |
2376 | tree x = va_arg (p, tree); | |
2a1e9fdd | 2377 | TREE_OPERAND (t, i) = x; |
5566b478 MS |
2378 | } |
2379 | ||
e34d07f2 | 2380 | va_end (p); |
5566b478 MS |
2381 | return t; |
2382 | } | |
2383 | ||
5039610b | 2384 | |
8e1daa34 | 2385 | /* Similar to `build', but for template definitions. */ |
5566b478 MS |
2386 | |
2387 | tree | |
e34d07f2 | 2388 | build_min (enum tree_code code, tree tt, ...) |
5566b478 | 2389 | { |
926ce8bd KH |
2390 | tree t; |
2391 | int length; | |
2392 | int i; | |
e34d07f2 | 2393 | va_list p; |
5566b478 | 2394 | |
5039610b SL |
2395 | gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp); |
2396 | ||
e34d07f2 | 2397 | va_start (p, tt); |
5566b478 | 2398 | |
5566b478 | 2399 | t = make_node (code); |
8d5e6e25 | 2400 | length = TREE_CODE_LENGTH (code); |
2a1e9fdd | 2401 | TREE_TYPE (t) = tt; |
5566b478 MS |
2402 | |
2403 | for (i = 0; i < length; i++) | |
2404 | { | |
2405 | tree x = va_arg (p, tree); | |
2a1e9fdd | 2406 | TREE_OPERAND (t, i) = x; |
4f976745 | 2407 | if (x && !TYPE_P (x) && TREE_SIDE_EFFECTS (x)) |
8e1daa34 | 2408 | TREE_SIDE_EFFECTS (t) = 1; |
5566b478 MS |
2409 | } |
2410 | ||
e34d07f2 | 2411 | va_end (p); |
5566b478 MS |
2412 | return t; |
2413 | } | |
2414 | ||
8e1daa34 NS |
2415 | /* Similar to `build', but for template definitions of non-dependent |
2416 | expressions. NON_DEP is the non-dependent expression that has been | |
2417 | built. */ | |
2418 | ||
2419 | tree | |
2420 | build_min_non_dep (enum tree_code code, tree non_dep, ...) | |
2421 | { | |
926ce8bd KH |
2422 | tree t; |
2423 | int length; | |
2424 | int i; | |
8e1daa34 NS |
2425 | va_list p; |
2426 | ||
5039610b SL |
2427 | gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp); |
2428 | ||
8e1daa34 NS |
2429 | va_start (p, non_dep); |
2430 | ||
e87b4dde JM |
2431 | if (REFERENCE_REF_P (non_dep)) |
2432 | non_dep = TREE_OPERAND (non_dep, 0); | |
2433 | ||
8e1daa34 NS |
2434 | t = make_node (code); |
2435 | length = TREE_CODE_LENGTH (code); | |
2436 | TREE_TYPE (t) = TREE_TYPE (non_dep); | |
8e1daa34 NS |
2437 | TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (non_dep); |
2438 | ||
2439 | for (i = 0; i < length; i++) | |
2440 | { | |
2441 | tree x = va_arg (p, tree); | |
2442 | TREE_OPERAND (t, i) = x; | |
2443 | } | |
2444 | ||
2445 | if (code == COMPOUND_EXPR && TREE_CODE (non_dep) != COMPOUND_EXPR) | |
2446 | /* This should not be considered a COMPOUND_EXPR, because it | |
04c06002 | 2447 | resolves to an overload. */ |
8e1daa34 | 2448 | COMPOUND_EXPR_OVERLOADED (t) = 1; |
9f63daea | 2449 | |
8e1daa34 | 2450 | va_end (p); |
e87b4dde | 2451 | return convert_from_reference (t); |
8e1daa34 NS |
2452 | } |
2453 | ||
3fcb9d1b NF |
2454 | /* Similar to `build_nt_call_vec', but for template definitions of |
2455 | non-dependent expressions. NON_DEP is the non-dependent expression | |
2456 | that has been built. */ | |
5039610b SL |
2457 | |
2458 | tree | |
9771b263 | 2459 | build_min_non_dep_call_vec (tree non_dep, tree fn, vec<tree, va_gc> *argvec) |
5039610b | 2460 | { |
c166b898 | 2461 | tree t = build_nt_call_vec (fn, argvec); |
e87b4dde JM |
2462 | if (REFERENCE_REF_P (non_dep)) |
2463 | non_dep = TREE_OPERAND (non_dep, 0); | |
5039610b SL |
2464 | TREE_TYPE (t) = TREE_TYPE (non_dep); |
2465 | TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (non_dep); | |
e87b4dde | 2466 | return convert_from_reference (t); |
5039610b SL |
2467 | } |
2468 | ||
5566b478 | 2469 | tree |
b57b79f7 | 2470 | get_type_decl (tree t) |
5566b478 | 2471 | { |
5566b478 MS |
2472 | if (TREE_CODE (t) == TYPE_DECL) |
2473 | return t; | |
2f939d94 | 2474 | if (TYPE_P (t)) |
5566b478 | 2475 | return TYPE_STUB_DECL (t); |
315fb5db NS |
2476 | gcc_assert (t == error_mark_node); |
2477 | return t; | |
5566b478 MS |
2478 | } |
2479 | ||
700466c2 JM |
2480 | /* Returns the namespace that contains DECL, whether directly or |
2481 | indirectly. */ | |
2482 | ||
2483 | tree | |
b57b79f7 | 2484 | decl_namespace_context (tree decl) |
700466c2 JM |
2485 | { |
2486 | while (1) | |
2487 | { | |
2488 | if (TREE_CODE (decl) == NAMESPACE_DECL) | |
2489 | return decl; | |
2490 | else if (TYPE_P (decl)) | |
2491 | decl = CP_DECL_CONTEXT (TYPE_MAIN_DECL (decl)); | |
2492 | else | |
2493 | decl = CP_DECL_CONTEXT (decl); | |
2494 | } | |
2495 | } | |
2496 | ||
b9e75696 JM |
2497 | /* Returns true if decl is within an anonymous namespace, however deeply |
2498 | nested, or false otherwise. */ | |
2499 | ||
2500 | bool | |
58f9752a | 2501 | decl_anon_ns_mem_p (const_tree decl) |
b9e75696 JM |
2502 | { |
2503 | while (1) | |
2504 | { | |
653109bd | 2505 | if (decl == NULL_TREE || decl == error_mark_node) |
b9e75696 JM |
2506 | return false; |
2507 | if (TREE_CODE (decl) == NAMESPACE_DECL | |
2508 | && DECL_NAME (decl) == NULL_TREE) | |
2509 | return true; | |
2510 | /* Classes and namespaces inside anonymous namespaces have | |
2511 | TREE_PUBLIC == 0, so we can shortcut the search. */ | |
2512 | else if (TYPE_P (decl)) | |
82f2836c | 2513 | return (TREE_PUBLIC (TYPE_MAIN_DECL (decl)) == 0); |
b9e75696 JM |
2514 | else if (TREE_CODE (decl) == NAMESPACE_DECL) |
2515 | return (TREE_PUBLIC (decl) == 0); | |
2516 | else | |
2517 | decl = DECL_CONTEXT (decl); | |
2518 | } | |
2519 | } | |
2520 | ||
c873934c JM |
2521 | /* Subroutine of cp_tree_equal: t1 and t2 are the CALL_EXPR_FNs of two |
2522 | CALL_EXPRS. Return whether they are equivalent. */ | |
2523 | ||
2524 | static bool | |
2525 | called_fns_equal (tree t1, tree t2) | |
2526 | { | |
2527 | /* Core 1321: dependent names are equivalent even if the overload sets | |
2528 | are different. But do compare explicit template arguments. */ | |
2529 | tree name1 = dependent_name (t1); | |
2530 | tree name2 = dependent_name (t2); | |
2531 | if (name1 || name2) | |
2532 | { | |
2533 | tree targs1 = NULL_TREE, targs2 = NULL_TREE; | |
2534 | ||
2535 | if (name1 != name2) | |
2536 | return false; | |
2537 | ||
2538 | if (TREE_CODE (t1) == TEMPLATE_ID_EXPR) | |
2539 | targs1 = TREE_OPERAND (t1, 1); | |
2540 | if (TREE_CODE (t2) == TEMPLATE_ID_EXPR) | |
2541 | targs2 = TREE_OPERAND (t2, 1); | |
2542 | return cp_tree_equal (targs1, targs2); | |
2543 | } | |
2544 | else | |
2545 | return cp_tree_equal (t1, t2); | |
2546 | } | |
2547 | ||
67d743fe | 2548 | /* Return truthvalue of whether T1 is the same tree structure as T2. |
c8a209ca | 2549 | Return 1 if they are the same. Return 0 if they are different. */ |
67d743fe | 2550 | |
c8a209ca | 2551 | bool |
b57b79f7 | 2552 | cp_tree_equal (tree t1, tree t2) |
67d743fe | 2553 | { |
926ce8bd | 2554 | enum tree_code code1, code2; |
67d743fe MS |
2555 | |
2556 | if (t1 == t2) | |
c8a209ca NS |
2557 | return true; |
2558 | if (!t1 || !t2) | |
2559 | return false; | |
2560 | ||
2561 | for (code1 = TREE_CODE (t1); | |
1a87cf0c | 2562 | CONVERT_EXPR_CODE_P (code1) |
c8a209ca NS |
2563 | || code1 == NON_LVALUE_EXPR; |
2564 | code1 = TREE_CODE (t1)) | |
2565 | t1 = TREE_OPERAND (t1, 0); | |
2566 | for (code2 = TREE_CODE (t2); | |
1a87cf0c | 2567 | CONVERT_EXPR_CODE_P (code2) |
b722c9a2 | 2568 | || code2 == NON_LVALUE_EXPR; |
c8a209ca NS |
2569 | code2 = TREE_CODE (t2)) |
2570 | t2 = TREE_OPERAND (t2, 0); | |
2571 | ||
2572 | /* They might have become equal now. */ | |
2573 | if (t1 == t2) | |
2574 | return true; | |
9f63daea | 2575 | |
67d743fe | 2576 | if (code1 != code2) |
c8a209ca | 2577 | return false; |
67d743fe MS |
2578 | |
2579 | switch (code1) | |
2580 | { | |
2581 | case INTEGER_CST: | |
2582 | return TREE_INT_CST_LOW (t1) == TREE_INT_CST_LOW (t2) | |
2583 | && TREE_INT_CST_HIGH (t1) == TREE_INT_CST_HIGH (t2); | |
2584 | ||
2585 | case REAL_CST: | |
2586 | return REAL_VALUES_EQUAL (TREE_REAL_CST (t1), TREE_REAL_CST (t2)); | |
2587 | ||
2588 | case STRING_CST: | |
2589 | return TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2) | |
da61dec9 | 2590 | && !memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2), |
c8a209ca | 2591 | TREE_STRING_LENGTH (t1)); |
67d743fe | 2592 | |
d05739f8 JM |
2593 | case FIXED_CST: |
2594 | return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1), | |
2595 | TREE_FIXED_CST (t2)); | |
2596 | ||
2a2193e0 SM |
2597 | case COMPLEX_CST: |
2598 | return cp_tree_equal (TREE_REALPART (t1), TREE_REALPART (t2)) | |
2599 | && cp_tree_equal (TREE_IMAGPART (t1), TREE_IMAGPART (t2)); | |
2600 | ||
4eab75dd MG |
2601 | case VECTOR_CST: |
2602 | return operand_equal_p (t1, t2, OEP_ONLY_CONST); | |
2603 | ||
67d743fe | 2604 | case CONSTRUCTOR: |
7dd4bdf5 MM |
2605 | /* We need to do this when determining whether or not two |
2606 | non-type pointer to member function template arguments | |
2607 | are the same. */ | |
31d06664 JM |
2608 | if (!same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)) |
2609 | || CONSTRUCTOR_NELTS (t1) != CONSTRUCTOR_NELTS (t2)) | |
c8a209ca | 2610 | return false; |
31d06664 JM |
2611 | { |
2612 | tree field, value; | |
2613 | unsigned int i; | |
2614 | FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t1), i, field, value) | |
2615 | { | |
2616 | constructor_elt *elt2 = CONSTRUCTOR_ELT (t2, i); | |
2617 | if (!cp_tree_equal (field, elt2->index) | |
2618 | || !cp_tree_equal (value, elt2->value)) | |
2619 | return false; | |
2620 | } | |
2621 | } | |
2622 | return true; | |
7dd4bdf5 MM |
2623 | |
2624 | case TREE_LIST: | |
c8a209ca NS |
2625 | if (!cp_tree_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2))) |
2626 | return false; | |
2627 | if (!cp_tree_equal (TREE_VALUE (t1), TREE_VALUE (t2))) | |
2628 | return false; | |
7dd4bdf5 | 2629 | return cp_tree_equal (TREE_CHAIN (t1), TREE_CHAIN (t2)); |
67d743fe MS |
2630 | |
2631 | case SAVE_EXPR: | |
2632 | return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); | |
2633 | ||
2634 | case CALL_EXPR: | |
5039610b SL |
2635 | { |
2636 | tree arg1, arg2; | |
2637 | call_expr_arg_iterator iter1, iter2; | |
c873934c | 2638 | if (!called_fns_equal (CALL_EXPR_FN (t1), CALL_EXPR_FN (t2))) |
5039610b SL |
2639 | return false; |
2640 | for (arg1 = first_call_expr_arg (t1, &iter1), | |
2641 | arg2 = first_call_expr_arg (t2, &iter2); | |
2642 | arg1 && arg2; | |
2643 | arg1 = next_call_expr_arg (&iter1), | |
2644 | arg2 = next_call_expr_arg (&iter2)) | |
2645 | if (!cp_tree_equal (arg1, arg2)) | |
2646 | return false; | |
96b4a0b5 JM |
2647 | if (arg1 || arg2) |
2648 | return false; | |
2649 | return true; | |
5039610b | 2650 | } |
67d743fe | 2651 | |
c8a209ca NS |
2652 | case TARGET_EXPR: |
2653 | { | |
2654 | tree o1 = TREE_OPERAND (t1, 0); | |
2655 | tree o2 = TREE_OPERAND (t2, 0); | |
9f63daea | 2656 | |
c8a209ca NS |
2657 | /* Special case: if either target is an unallocated VAR_DECL, |
2658 | it means that it's going to be unified with whatever the | |
2659 | TARGET_EXPR is really supposed to initialize, so treat it | |
2660 | as being equivalent to anything. */ | |
5a6ccc94 | 2661 | if (VAR_P (o1) && DECL_NAME (o1) == NULL_TREE |
c8a209ca NS |
2662 | && !DECL_RTL_SET_P (o1)) |
2663 | /*Nop*/; | |
5a6ccc94 | 2664 | else if (VAR_P (o2) && DECL_NAME (o2) == NULL_TREE |
c8a209ca NS |
2665 | && !DECL_RTL_SET_P (o2)) |
2666 | /*Nop*/; | |
2667 | else if (!cp_tree_equal (o1, o2)) | |
2668 | return false; | |
9f63daea | 2669 | |
c8a209ca NS |
2670 | return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)); |
2671 | } | |
9f63daea | 2672 | |
67d743fe | 2673 | case WITH_CLEANUP_EXPR: |
c8a209ca NS |
2674 | if (!cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))) |
2675 | return false; | |
6ad7895a | 2676 | return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t1, 1)); |
67d743fe MS |
2677 | |
2678 | case COMPONENT_REF: | |
c8a209ca NS |
2679 | if (TREE_OPERAND (t1, 1) != TREE_OPERAND (t2, 1)) |
2680 | return false; | |
2681 | return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); | |
67d743fe | 2682 | |
67d743fe | 2683 | case PARM_DECL: |
a77f94e2 | 2684 | /* For comparing uses of parameters in late-specified return types |
e7dc5734 JM |
2685 | with an out-of-class definition of the function, but can also come |
2686 | up for expressions that involve 'this' in a member function | |
2687 | template. */ | |
25976b7f JM |
2688 | |
2689 | if (comparing_specializations) | |
2690 | /* When comparing hash table entries, only an exact match is | |
2691 | good enough; we don't want to replace 'this' with the | |
2692 | version from another function. */ | |
2693 | return false; | |
2694 | ||
e7dc5734 JM |
2695 | if (same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
2696 | { | |
2697 | if (DECL_ARTIFICIAL (t1) ^ DECL_ARTIFICIAL (t2)) | |
2698 | return false; | |
2699 | if (DECL_ARTIFICIAL (t1) | |
2700 | || (DECL_PARM_LEVEL (t1) == DECL_PARM_LEVEL (t2) | |
2701 | && DECL_PARM_INDEX (t1) == DECL_PARM_INDEX (t2))) | |
2702 | return true; | |
2703 | } | |
2704 | return false; | |
a77f94e2 JM |
2705 | |
2706 | case VAR_DECL: | |
67d743fe | 2707 | case CONST_DECL: |
9b2770f2 | 2708 | case FIELD_DECL: |
67d743fe | 2709 | case FUNCTION_DECL: |
c8a209ca NS |
2710 | case TEMPLATE_DECL: |
2711 | case IDENTIFIER_NODE: | |
47c0c7d7 | 2712 | case SSA_NAME: |
c8a209ca | 2713 | return false; |
67d743fe | 2714 | |
17a27b4f MM |
2715 | case BASELINK: |
2716 | return (BASELINK_BINFO (t1) == BASELINK_BINFO (t2) | |
2717 | && BASELINK_ACCESS_BINFO (t1) == BASELINK_ACCESS_BINFO (t2) | |
4643a68e | 2718 | && BASELINK_QUALIFIED_P (t1) == BASELINK_QUALIFIED_P (t2) |
17a27b4f MM |
2719 | && cp_tree_equal (BASELINK_FUNCTIONS (t1), |
2720 | BASELINK_FUNCTIONS (t2))); | |
2721 | ||
f84b4be9 | 2722 | case TEMPLATE_PARM_INDEX: |
31758337 NS |
2723 | return (TEMPLATE_PARM_IDX (t1) == TEMPLATE_PARM_IDX (t2) |
2724 | && TEMPLATE_PARM_LEVEL (t1) == TEMPLATE_PARM_LEVEL (t2) | |
9524f710 LE |
2725 | && (TEMPLATE_PARM_PARAMETER_PACK (t1) |
2726 | == TEMPLATE_PARM_PARAMETER_PACK (t2)) | |
31758337 NS |
2727 | && same_type_p (TREE_TYPE (TEMPLATE_PARM_DECL (t1)), |
2728 | TREE_TYPE (TEMPLATE_PARM_DECL (t2)))); | |
67d743fe | 2729 | |
bf12d54d | 2730 | case TEMPLATE_ID_EXPR: |
c873934c JM |
2731 | return (cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)) |
2732 | && cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1))); | |
2733 | ||
2734 | case TREE_VEC: | |
bf12d54d NS |
2735 | { |
2736 | unsigned ix; | |
c873934c | 2737 | if (TREE_VEC_LENGTH (t1) != TREE_VEC_LENGTH (t2)) |
bf12d54d | 2738 | return false; |
c873934c JM |
2739 | for (ix = TREE_VEC_LENGTH (t1); ix--;) |
2740 | if (!cp_tree_equal (TREE_VEC_ELT (t1, ix), | |
2741 | TREE_VEC_ELT (t2, ix))) | |
bf12d54d | 2742 | return false; |
bf12d54d NS |
2743 | return true; |
2744 | } | |
9f63daea | 2745 | |
67d743fe | 2746 | case SIZEOF_EXPR: |
abff8e06 | 2747 | case ALIGNOF_EXPR: |
c8a209ca NS |
2748 | { |
2749 | tree o1 = TREE_OPERAND (t1, 0); | |
2750 | tree o2 = TREE_OPERAND (t2, 0); | |
9f63daea | 2751 | |
ba29e5c2 JJ |
2752 | if (code1 == SIZEOF_EXPR) |
2753 | { | |
2754 | if (SIZEOF_EXPR_TYPE_P (t1)) | |
2755 | o1 = TREE_TYPE (o1); | |
2756 | if (SIZEOF_EXPR_TYPE_P (t2)) | |
2757 | o2 = TREE_TYPE (o2); | |
2758 | } | |
c8a209ca NS |
2759 | if (TREE_CODE (o1) != TREE_CODE (o2)) |
2760 | return false; | |
2761 | if (TYPE_P (o1)) | |
2762 | return same_type_p (o1, o2); | |
2763 | else | |
2764 | return cp_tree_equal (o1, o2); | |
2765 | } | |
9f63daea | 2766 | |
6f9f76e3 SM |
2767 | case MODOP_EXPR: |
2768 | { | |
2769 | tree t1_op1, t2_op1; | |
2770 | ||
2771 | if (!cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))) | |
2772 | return false; | |
2773 | ||
2774 | t1_op1 = TREE_OPERAND (t1, 1); | |
2775 | t2_op1 = TREE_OPERAND (t2, 1); | |
2776 | if (TREE_CODE (t1_op1) != TREE_CODE (t2_op1)) | |
2777 | return false; | |
2778 | ||
2779 | return cp_tree_equal (TREE_OPERAND (t1, 2), TREE_OPERAND (t2, 2)); | |
2780 | } | |
2781 | ||
61a127b3 MM |
2782 | case PTRMEM_CST: |
2783 | /* Two pointer-to-members are the same if they point to the same | |
2784 | field or function in the same class. */ | |
c8a209ca NS |
2785 | if (PTRMEM_CST_MEMBER (t1) != PTRMEM_CST_MEMBER (t2)) |
2786 | return false; | |
2787 | ||
2788 | return same_type_p (PTRMEM_CST_CLASS (t1), PTRMEM_CST_CLASS (t2)); | |
61a127b3 | 2789 | |
943e3ede MM |
2790 | case OVERLOAD: |
2791 | if (OVL_FUNCTION (t1) != OVL_FUNCTION (t2)) | |
2792 | return false; | |
2793 | return cp_tree_equal (OVL_CHAIN (t1), OVL_CHAIN (t2)); | |
2794 | ||
ea798d0f PC |
2795 | case TRAIT_EXPR: |
2796 | if (TRAIT_EXPR_KIND (t1) != TRAIT_EXPR_KIND (t2)) | |
2797 | return false; | |
2798 | return same_type_p (TRAIT_EXPR_TYPE1 (t1), TRAIT_EXPR_TYPE1 (t2)) | |
2799 | && same_type_p (TRAIT_EXPR_TYPE2 (t1), TRAIT_EXPR_TYPE2 (t2)); | |
2800 | ||
ab73eba8 JM |
2801 | case CAST_EXPR: |
2802 | case STATIC_CAST_EXPR: | |
2803 | case REINTERPRET_CAST_EXPR: | |
2804 | case CONST_CAST_EXPR: | |
2805 | case DYNAMIC_CAST_EXPR: | |
a4474a38 | 2806 | case IMPLICIT_CONV_EXPR: |
ab73eba8 JM |
2807 | case NEW_EXPR: |
2808 | if (!same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))) | |
2809 | return false; | |
2810 | /* Now compare operands as usual. */ | |
2811 | break; | |
2812 | ||
10261728 JM |
2813 | case DEFERRED_NOEXCEPT: |
2814 | return (cp_tree_equal (DEFERRED_NOEXCEPT_PATTERN (t1), | |
2815 | DEFERRED_NOEXCEPT_PATTERN (t2)) | |
2816 | && comp_template_args (DEFERRED_NOEXCEPT_ARGS (t1), | |
2817 | DEFERRED_NOEXCEPT_ARGS (t2))); | |
2818 | break; | |
2819 | ||
7f85441b KG |
2820 | default: |
2821 | break; | |
67d743fe MS |
2822 | } |
2823 | ||
2824 | switch (TREE_CODE_CLASS (code1)) | |
2825 | { | |
6615c446 JO |
2826 | case tcc_unary: |
2827 | case tcc_binary: | |
2828 | case tcc_comparison: | |
2829 | case tcc_expression: | |
5039610b | 2830 | case tcc_vl_exp: |
6615c446 JO |
2831 | case tcc_reference: |
2832 | case tcc_statement: | |
aa1826e2 | 2833 | { |
5039610b SL |
2834 | int i, n; |
2835 | ||
d26e5986 | 2836 | n = cp_tree_operand_length (t1); |
5039610b SL |
2837 | if (TREE_CODE_CLASS (code1) == tcc_vl_exp |
2838 | && n != TREE_OPERAND_LENGTH (t2)) | |
2839 | return false; | |
9f63daea | 2840 | |
5039610b | 2841 | for (i = 0; i < n; ++i) |
c8a209ca NS |
2842 | if (!cp_tree_equal (TREE_OPERAND (t1, i), TREE_OPERAND (t2, i))) |
2843 | return false; | |
9f63daea | 2844 | |
c8a209ca | 2845 | return true; |
aa1826e2 | 2846 | } |
9f63daea | 2847 | |
6615c446 | 2848 | case tcc_type: |
c8a209ca | 2849 | return same_type_p (t1, t2); |
6615c446 JO |
2850 | default: |
2851 | gcc_unreachable (); | |
67d743fe | 2852 | } |
6615c446 | 2853 | /* We can get here with --disable-checking. */ |
c8a209ca | 2854 | return false; |
67d743fe | 2855 | } |
73aad9b9 | 2856 | |
d11ad92e MS |
2857 | /* The type of ARG when used as an lvalue. */ |
2858 | ||
2859 | tree | |
b57b79f7 | 2860 | lvalue_type (tree arg) |
d11ad92e | 2861 | { |
2c73f9f5 | 2862 | tree type = TREE_TYPE (arg); |
8cd4c175 | 2863 | return type; |
d11ad92e MS |
2864 | } |
2865 | ||
2866 | /* The type of ARG for printing error messages; denote lvalues with | |
2867 | reference types. */ | |
2868 | ||
2869 | tree | |
b57b79f7 | 2870 | error_type (tree arg) |
d11ad92e MS |
2871 | { |
2872 | tree type = TREE_TYPE (arg); | |
9f63daea | 2873 | |
d11ad92e MS |
2874 | if (TREE_CODE (type) == ARRAY_TYPE) |
2875 | ; | |
08476342 NS |
2876 | else if (TREE_CODE (type) == ERROR_MARK) |
2877 | ; | |
d11ad92e MS |
2878 | else if (real_lvalue_p (arg)) |
2879 | type = build_reference_type (lvalue_type (arg)); | |
9e1e64ec | 2880 | else if (MAYBE_CLASS_TYPE_P (type)) |
d11ad92e MS |
2881 | type = lvalue_type (arg); |
2882 | ||
2883 | return type; | |
2884 | } | |
eb66be0e MS |
2885 | |
2886 | /* Does FUNCTION use a variable-length argument list? */ | |
2887 | ||
2888 | int | |
58f9752a | 2889 | varargs_function_p (const_tree function) |
eb66be0e | 2890 | { |
f38958e8 | 2891 | return stdarg_p (TREE_TYPE (function)); |
eb66be0e | 2892 | } |
f94ae2f5 JM |
2893 | |
2894 | /* Returns 1 if decl is a member of a class. */ | |
2895 | ||
2896 | int | |
58f9752a | 2897 | member_p (const_tree decl) |
f94ae2f5 | 2898 | { |
58f9752a | 2899 | const_tree const ctx = DECL_CONTEXT (decl); |
2f939d94 | 2900 | return (ctx && TYPE_P (ctx)); |
f94ae2f5 | 2901 | } |
51924768 JM |
2902 | |
2903 | /* Create a placeholder for member access where we don't actually have an | |
2904 | object that the access is against. */ | |
2905 | ||
2906 | tree | |
b57b79f7 | 2907 | build_dummy_object (tree type) |
51924768 | 2908 | { |
44689c12 | 2909 | tree decl = build1 (NOP_EXPR, build_pointer_type (type), void_zero_node); |
dd865ef6 | 2910 | return cp_build_indirect_ref (decl, RO_NULL, tf_warning_or_error); |
51924768 JM |
2911 | } |
2912 | ||
2913 | /* We've gotten a reference to a member of TYPE. Return *this if appropriate, | |
2914 | or a dummy object otherwise. If BINFOP is non-0, it is filled with the | |
2915 | binfo path from current_class_type to TYPE, or 0. */ | |
2916 | ||
2917 | tree | |
b57b79f7 | 2918 | maybe_dummy_object (tree type, tree* binfop) |
51924768 JM |
2919 | { |
2920 | tree decl, context; | |
2db1ab2d | 2921 | tree binfo; |
a6846853 | 2922 | tree current = current_nonlambda_class_type (); |
9f63daea | 2923 | |
a6846853 | 2924 | if (current |
22854930 PC |
2925 | && (binfo = lookup_base (current, type, ba_any, NULL, |
2926 | tf_warning_or_error))) | |
a6846853 | 2927 | context = current; |
51924768 JM |
2928 | else |
2929 | { | |
2930 | /* Reference from a nested class member function. */ | |
2931 | context = type; | |
2db1ab2d | 2932 | binfo = TYPE_BINFO (type); |
51924768 JM |
2933 | } |
2934 | ||
2db1ab2d NS |
2935 | if (binfop) |
2936 | *binfop = binfo; | |
9f63daea | 2937 | |
41d04a8d JM |
2938 | if (current_class_ref |
2939 | /* current_class_ref might not correspond to current_class_type if | |
2940 | we're in tsubst_default_argument or a lambda-declarator; in either | |
2941 | case, we want to use current_class_ref if it matches CONTEXT. */ | |
2942 | && (same_type_ignoring_top_level_qualifiers_p | |
2943 | (TREE_TYPE (current_class_ref), context))) | |
51924768 JM |
2944 | decl = current_class_ref; |
2945 | else | |
2946 | decl = build_dummy_object (context); | |
2947 | ||
2948 | return decl; | |
2949 | } | |
2950 | ||
2951 | /* Returns 1 if OB is a placeholder object, or a pointer to one. */ | |
2952 | ||
2953 | int | |
58f9752a | 2954 | is_dummy_object (const_tree ob) |
51924768 | 2955 | { |
591cb3cf | 2956 | if (INDIRECT_REF_P (ob)) |
51924768 JM |
2957 | ob = TREE_OPERAND (ob, 0); |
2958 | return (TREE_CODE (ob) == NOP_EXPR | |
44689c12 | 2959 | && TREE_OPERAND (ob, 0) == void_zero_node); |
51924768 | 2960 | } |
5524676d | 2961 | |
c32097d8 JM |
2962 | /* Returns 1 iff type T is something we want to treat as a scalar type for |
2963 | the purpose of deciding whether it is trivial/POD/standard-layout. */ | |
2964 | ||
11f35925 | 2965 | bool |
c32097d8 JM |
2966 | scalarish_type_p (const_tree t) |
2967 | { | |
2968 | if (t == error_mark_node) | |
2969 | return 1; | |
2970 | ||
2971 | return (SCALAR_TYPE_P (t) | |
2972 | || TREE_CODE (t) == VECTOR_TYPE); | |
2973 | } | |
2974 | ||
2975 | /* Returns true iff T requires non-trivial default initialization. */ | |
2976 | ||
2977 | bool | |
2978 | type_has_nontrivial_default_init (const_tree t) | |
2979 | { | |
2980 | t = strip_array_types (CONST_CAST_TREE (t)); | |
2981 | ||
2982 | if (CLASS_TYPE_P (t)) | |
2983 | return TYPE_HAS_COMPLEX_DFLT (t); | |
2984 | else | |
2985 | return 0; | |
2986 | } | |
2987 | ||
d758e847 JM |
2988 | /* Returns true iff copying an object of type T (including via move |
2989 | constructor) is non-trivial. That is, T has no non-trivial copy | |
2990 | constructors and no non-trivial move constructors. */ | |
c32097d8 JM |
2991 | |
2992 | bool | |
2993 | type_has_nontrivial_copy_init (const_tree t) | |
2994 | { | |
2995 | t = strip_array_types (CONST_CAST_TREE (t)); | |
2996 | ||
2997 | if (CLASS_TYPE_P (t)) | |
d758e847 JM |
2998 | { |
2999 | gcc_assert (COMPLETE_TYPE_P (t)); | |
3000 | return ((TYPE_HAS_COPY_CTOR (t) | |
3001 | && TYPE_HAS_COMPLEX_COPY_CTOR (t)) | |
3002 | || TYPE_HAS_COMPLEX_MOVE_CTOR (t)); | |
3003 | } | |
c32097d8 JM |
3004 | else |
3005 | return 0; | |
3006 | } | |
3007 | ||
46408846 JM |
3008 | /* Returns 1 iff type T is a trivially copyable type, as defined in |
3009 | [basic.types] and [class]. */ | |
c32097d8 JM |
3010 | |
3011 | bool | |
46408846 | 3012 | trivially_copyable_p (const_tree t) |
c32097d8 JM |
3013 | { |
3014 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3015 | ||
3016 | if (CLASS_TYPE_P (t)) | |
d758e847 JM |
3017 | return ((!TYPE_HAS_COPY_CTOR (t) |
3018 | || !TYPE_HAS_COMPLEX_COPY_CTOR (t)) | |
3019 | && !TYPE_HAS_COMPLEX_MOVE_CTOR (t) | |
3020 | && (!TYPE_HAS_COPY_ASSIGN (t) | |
3021 | || !TYPE_HAS_COMPLEX_COPY_ASSIGN (t)) | |
3022 | && !TYPE_HAS_COMPLEX_MOVE_ASSIGN (t) | |
334738b4 | 3023 | && TYPE_HAS_TRIVIAL_DESTRUCTOR (t)); |
c32097d8 JM |
3024 | else |
3025 | return scalarish_type_p (t); | |
3026 | } | |
3027 | ||
46408846 JM |
3028 | /* Returns 1 iff type T is a trivial type, as defined in [basic.types] and |
3029 | [class]. */ | |
3030 | ||
3031 | bool | |
3032 | trivial_type_p (const_tree t) | |
3033 | { | |
3034 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3035 | ||
3036 | if (CLASS_TYPE_P (t)) | |
3037 | return (TYPE_HAS_TRIVIAL_DFLT (t) | |
3038 | && trivially_copyable_p (t)); | |
3039 | else | |
3040 | return scalarish_type_p (t); | |
3041 | } | |
3042 | ||
5524676d JM |
3043 | /* Returns 1 iff type T is a POD type, as defined in [basic.types]. */ |
3044 | ||
c32097d8 | 3045 | bool |
58f9752a | 3046 | pod_type_p (const_tree t) |
5524676d | 3047 | { |
4e9b57fa | 3048 | /* This CONST_CAST is okay because strip_array_types returns its |
75547801 | 3049 | argument unmodified and we assign it to a const_tree. */ |
b1d5455a | 3050 | t = strip_array_types (CONST_CAST_TREE(t)); |
5524676d | 3051 | |
cc72bbaa JM |
3052 | if (!CLASS_TYPE_P (t)) |
3053 | return scalarish_type_p (t); | |
3054 | else if (cxx_dialect > cxx98) | |
c32097d8 JM |
3055 | /* [class]/10: A POD struct is a class that is both a trivial class and a |
3056 | standard-layout class, and has no non-static data members of type | |
3057 | non-POD struct, non-POD union (or array of such types). | |
3058 | ||
3059 | We don't need to check individual members because if a member is | |
3060 | non-std-layout or non-trivial, the class will be too. */ | |
3061 | return (std_layout_type_p (t) && trivial_type_p (t)); | |
3062 | else | |
cc72bbaa JM |
3063 | /* The C++98 definition of POD is different. */ |
3064 | return !CLASSTYPE_NON_LAYOUT_POD_P (t); | |
c32097d8 JM |
3065 | } |
3066 | ||
3067 | /* Returns true iff T is POD for the purpose of layout, as defined in the | |
3068 | C++ ABI. */ | |
3069 | ||
3070 | bool | |
3071 | layout_pod_type_p (const_tree t) | |
3072 | { | |
3073 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3074 | ||
3075 | if (CLASS_TYPE_P (t)) | |
3076 | return !CLASSTYPE_NON_LAYOUT_POD_P (t); | |
3077 | else | |
3078 | return scalarish_type_p (t); | |
3079 | } | |
3080 | ||
3081 | /* Returns true iff T is a standard-layout type, as defined in | |
3082 | [basic.types]. */ | |
3083 | ||
3084 | bool | |
3085 | std_layout_type_p (const_tree t) | |
3086 | { | |
3087 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3088 | ||
3089 | if (CLASS_TYPE_P (t)) | |
3090 | return !CLASSTYPE_NON_STD_LAYOUT (t); | |
3091 | else | |
3092 | return scalarish_type_p (t); | |
5524676d | 3093 | } |
e5dc5fb2 | 3094 | |
39ef6592 LC |
3095 | /* Nonzero iff type T is a class template implicit specialization. */ |
3096 | ||
3097 | bool | |
ac7d7749 | 3098 | class_tmpl_impl_spec_p (const_tree t) |
39ef6592 LC |
3099 | { |
3100 | return CLASS_TYPE_P (t) && CLASSTYPE_TEMPLATE_INSTANTIATION (t); | |
3101 | } | |
3102 | ||
94e6e4c4 AO |
3103 | /* Returns 1 iff zero initialization of type T means actually storing |
3104 | zeros in it. */ | |
3105 | ||
3106 | int | |
58f9752a | 3107 | zero_init_p (const_tree t) |
94e6e4c4 | 3108 | { |
4e9b57fa | 3109 | /* This CONST_CAST is okay because strip_array_types returns its |
75547801 | 3110 | argument unmodified and we assign it to a const_tree. */ |
b1d5455a | 3111 | t = strip_array_types (CONST_CAST_TREE(t)); |
94e6e4c4 | 3112 | |
17bbb839 MM |
3113 | if (t == error_mark_node) |
3114 | return 1; | |
3115 | ||
94e6e4c4 | 3116 | /* NULL pointers to data members are initialized with -1. */ |
66b1156a | 3117 | if (TYPE_PTRDATAMEM_P (t)) |
94e6e4c4 AO |
3118 | return 0; |
3119 | ||
3120 | /* Classes that contain types that can't be zero-initialized, cannot | |
3121 | be zero-initialized themselves. */ | |
3122 | if (CLASS_TYPE_P (t) && CLASSTYPE_NON_ZERO_INIT_P (t)) | |
3123 | return 0; | |
3124 | ||
3125 | return 1; | |
3126 | } | |
3127 | ||
91d231cb | 3128 | /* Table of valid C++ attributes. */ |
349ae713 | 3129 | const struct attribute_spec cxx_attribute_table[] = |
e5dc5fb2 | 3130 | { |
62d784f7 KT |
3131 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
3132 | affects_type_identity } */ | |
3133 | { "java_interface", 0, 0, false, false, false, | |
3134 | handle_java_interface_attribute, false }, | |
3135 | { "com_interface", 0, 0, false, false, false, | |
3136 | handle_com_interface_attribute, false }, | |
3137 | { "init_priority", 1, 1, true, false, false, | |
3138 | handle_init_priority_attribute, false }, | |
7dbb85a7 JM |
3139 | { "abi_tag", 1, -1, false, false, false, |
3140 | handle_abi_tag_attribute, true }, | |
62d784f7 | 3141 | { NULL, 0, 0, false, false, false, NULL, false } |
91d231cb JM |
3142 | }; |
3143 | ||
3144 | /* Handle a "java_interface" attribute; arguments as in | |
3145 | struct attribute_spec.handler. */ | |
3146 | static tree | |
9f63daea | 3147 | handle_java_interface_attribute (tree* node, |
0cbd7506 | 3148 | tree name, |
12308bc6 | 3149 | tree /*args*/, |
0cbd7506 MS |
3150 | int flags, |
3151 | bool* no_add_attrs) | |
91d231cb JM |
3152 | { |
3153 | if (DECL_P (*node) | |
3154 | || !CLASS_TYPE_P (*node) | |
3155 | || !TYPE_FOR_JAVA (*node)) | |
60c87482 | 3156 | { |
a82e1a7d | 3157 | error ("%qE attribute can only be applied to Java class definitions", |
4460cef2 | 3158 | name); |
91d231cb JM |
3159 | *no_add_attrs = true; |
3160 | return NULL_TREE; | |
60c87482 | 3161 | } |
91d231cb | 3162 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
8dd16ecc | 3163 | *node = build_variant_type_copy (*node); |
91d231cb | 3164 | TYPE_JAVA_INTERFACE (*node) = 1; |
e5dc5fb2 | 3165 | |
91d231cb JM |
3166 | return NULL_TREE; |
3167 | } | |
3168 | ||
3169 | /* Handle a "com_interface" attribute; arguments as in | |
3170 | struct attribute_spec.handler. */ | |
3171 | static tree | |
9f63daea | 3172 | handle_com_interface_attribute (tree* node, |
0cbd7506 | 3173 | tree name, |
12308bc6 PC |
3174 | tree /*args*/, |
3175 | int /*flags*/, | |
0cbd7506 | 3176 | bool* no_add_attrs) |
91d231cb JM |
3177 | { |
3178 | static int warned; | |
3179 | ||
3180 | *no_add_attrs = true; | |
3181 | ||
3182 | if (DECL_P (*node) | |
3183 | || !CLASS_TYPE_P (*node) | |
3184 | || *node != TYPE_MAIN_VARIANT (*node)) | |
e5dc5fb2 | 3185 | { |
5c498b10 DD |
3186 | warning (OPT_Wattributes, "%qE attribute can only be applied " |
3187 | "to class definitions", name); | |
91d231cb JM |
3188 | return NULL_TREE; |
3189 | } | |
e5dc5fb2 | 3190 | |
91d231cb | 3191 | if (!warned++) |
d4ee4d25 | 3192 | warning (0, "%qE is obsolete; g++ vtables are now COM-compatible by default", |
4460cef2 | 3193 | name); |
91d231cb JM |
3194 | |
3195 | return NULL_TREE; | |
3196 | } | |
3197 | ||
3198 | /* Handle an "init_priority" attribute; arguments as in | |
3199 | struct attribute_spec.handler. */ | |
3200 | static tree | |
9f63daea | 3201 | handle_init_priority_attribute (tree* node, |
0cbd7506 MS |
3202 | tree name, |
3203 | tree args, | |
12308bc6 | 3204 | int /*flags*/, |
0cbd7506 | 3205 | bool* no_add_attrs) |
91d231cb JM |
3206 | { |
3207 | tree initp_expr = TREE_VALUE (args); | |
3208 | tree decl = *node; | |
3209 | tree type = TREE_TYPE (decl); | |
3210 | int pri; | |
3211 | ||
3212 | STRIP_NOPS (initp_expr); | |
9f63daea | 3213 | |
91d231cb JM |
3214 | if (!initp_expr || TREE_CODE (initp_expr) != INTEGER_CST) |
3215 | { | |
3216 | error ("requested init_priority is not an integer constant"); | |
3217 | *no_add_attrs = true; | |
3218 | return NULL_TREE; | |
3219 | } | |
e5dc5fb2 | 3220 | |
91d231cb | 3221 | pri = TREE_INT_CST_LOW (initp_expr); |
9f63daea | 3222 | |
91d231cb JM |
3223 | type = strip_array_types (type); |
3224 | ||
3225 | if (decl == NULL_TREE | |
5a6ccc94 | 3226 | || !VAR_P (decl) |
91d231cb JM |
3227 | || !TREE_STATIC (decl) |
3228 | || DECL_EXTERNAL (decl) | |
3229 | || (TREE_CODE (type) != RECORD_TYPE | |
3230 | && TREE_CODE (type) != UNION_TYPE) | |
3231 | /* Static objects in functions are initialized the | |
3232 | first time control passes through that | |
3233 | function. This is not precise enough to pin down an | |
c6002625 | 3234 | init_priority value, so don't allow it. */ |
9f63daea | 3235 | || current_function_decl) |
91d231cb | 3236 | { |
a82e1a7d | 3237 | error ("can only use %qE attribute on file-scope definitions " |
0cbd7506 | 3238 | "of objects of class type", name); |
91d231cb JM |
3239 | *no_add_attrs = true; |
3240 | return NULL_TREE; | |
3241 | } | |
e5dc5fb2 | 3242 | |
91d231cb JM |
3243 | if (pri > MAX_INIT_PRIORITY || pri <= 0) |
3244 | { | |
3245 | error ("requested init_priority is out of range"); | |
3246 | *no_add_attrs = true; | |
3247 | return NULL_TREE; | |
3248 | } | |
e5dc5fb2 | 3249 | |
91d231cb JM |
3250 | /* Check for init_priorities that are reserved for |
3251 | language and runtime support implementations.*/ | |
3252 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
3253 | { | |
9f63daea | 3254 | warning |
d4ee4d25 | 3255 | (0, "requested init_priority is reserved for internal use"); |
e5dc5fb2 JM |
3256 | } |
3257 | ||
91d231cb JM |
3258 | if (SUPPORTS_INIT_PRIORITY) |
3259 | { | |
820cc88f DB |
3260 | SET_DECL_INIT_PRIORITY (decl, pri); |
3261 | DECL_HAS_INIT_PRIORITY_P (decl) = 1; | |
91d231cb JM |
3262 | return NULL_TREE; |
3263 | } | |
3264 | else | |
3265 | { | |
a82e1a7d | 3266 | error ("%qE attribute is not supported on this platform", name); |
91d231cb JM |
3267 | *no_add_attrs = true; |
3268 | return NULL_TREE; | |
3269 | } | |
e5dc5fb2 | 3270 | } |
87533b37 | 3271 | |
7dbb85a7 JM |
3272 | /* DECL is being redeclared; the old declaration had the abi tags in OLD, |
3273 | and the new one has the tags in NEW_. Give an error if there are tags | |
3274 | in NEW_ that weren't in OLD. */ | |
3275 | ||
3276 | bool | |
3277 | check_abi_tag_redeclaration (const_tree decl, const_tree old, const_tree new_) | |
3278 | { | |
3279 | if (old && TREE_CODE (TREE_VALUE (old)) == TREE_LIST) | |
3280 | old = TREE_VALUE (old); | |
3281 | if (new_ && TREE_CODE (TREE_VALUE (new_)) == TREE_LIST) | |
3282 | new_ = TREE_VALUE (new_); | |
3283 | bool err = false; | |
3284 | for (const_tree t = new_; t; t = TREE_CHAIN (t)) | |
3285 | { | |
3286 | tree str = TREE_VALUE (t); | |
3287 | for (const_tree in = old; in; in = TREE_CHAIN (in)) | |
3288 | { | |
3289 | tree ostr = TREE_VALUE (in); | |
3290 | if (cp_tree_equal (str, ostr)) | |
3291 | goto found; | |
3292 | } | |
3293 | error ("redeclaration of %qD adds abi tag %E", decl, str); | |
3294 | err = true; | |
3295 | found:; | |
3296 | } | |
3297 | if (err) | |
3298 | { | |
3299 | inform (DECL_SOURCE_LOCATION (decl), "previous declaration here"); | |
3300 | return false; | |
3301 | } | |
3302 | return true; | |
3303 | } | |
3304 | ||
3305 | /* Handle an "abi_tag" attribute; arguments as in | |
3306 | struct attribute_spec.handler. */ | |
3307 | ||
3308 | static tree | |
3309 | handle_abi_tag_attribute (tree* node, tree name, tree args, | |
3310 | int flags, bool* no_add_attrs) | |
3311 | { | |
3312 | if (TYPE_P (*node)) | |
3313 | { | |
73243d63 | 3314 | if (!OVERLOAD_TYPE_P (*node)) |
7dbb85a7 JM |
3315 | { |
3316 | error ("%qE attribute applied to non-class, non-enum type %qT", | |
3317 | name, *node); | |
3318 | goto fail; | |
3319 | } | |
3320 | else if (!(flags & (int)ATTR_FLAG_TYPE_IN_PLACE)) | |
3321 | { | |
3322 | error ("%qE attribute applied to %qT after its definition", | |
3323 | name, *node); | |
3324 | goto fail; | |
3325 | } | |
3326 | ||
3327 | tree attributes = TYPE_ATTRIBUTES (*node); | |
3328 | tree decl = TYPE_NAME (*node); | |
3329 | ||
3330 | /* Make sure all declarations have the same abi tags. */ | |
3331 | if (DECL_SOURCE_LOCATION (decl) != input_location) | |
3332 | { | |
3333 | if (!check_abi_tag_redeclaration (decl, | |
3334 | lookup_attribute ("abi_tag", | |
3335 | attributes), | |
3336 | args)) | |
3337 | goto fail; | |
3338 | } | |
3339 | } | |
3340 | else | |
3341 | { | |
3342 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
3343 | { | |
3344 | error ("%qE attribute applied to non-function %qD", name, *node); | |
3345 | goto fail; | |
3346 | } | |
3347 | else if (DECL_LANGUAGE (*node) == lang_c) | |
3348 | { | |
3349 | error ("%qE attribute applied to extern \"C\" function %qD", | |
3350 | name, *node); | |
3351 | goto fail; | |
3352 | } | |
3353 | } | |
3354 | ||
3355 | return NULL_TREE; | |
3356 | ||
3357 | fail: | |
3358 | *no_add_attrs = true; | |
3359 | return NULL_TREE; | |
3360 | } | |
3361 | ||
87533b37 MM |
3362 | /* Return a new PTRMEM_CST of the indicated TYPE. The MEMBER is the |
3363 | thing pointed to by the constant. */ | |
3364 | ||
3365 | tree | |
b57b79f7 | 3366 | make_ptrmem_cst (tree type, tree member) |
87533b37 MM |
3367 | { |
3368 | tree ptrmem_cst = make_node (PTRMEM_CST); | |
87533b37 MM |
3369 | TREE_TYPE (ptrmem_cst) = type; |
3370 | PTRMEM_CST_MEMBER (ptrmem_cst) = member; | |
3371 | return ptrmem_cst; | |
3372 | } | |
3373 | ||
e9525111 | 3374 | /* Build a variant of TYPE that has the indicated ATTRIBUTES. May |
51035976 | 3375 | return an existing type if an appropriate type already exists. */ |
e9525111 MM |
3376 | |
3377 | tree | |
3378 | cp_build_type_attribute_variant (tree type, tree attributes) | |
3379 | { | |
3380 | tree new_type; | |
3381 | ||
3382 | new_type = build_type_attribute_variant (type, attributes); | |
3a55fb4c JM |
3383 | if (TREE_CODE (new_type) == FUNCTION_TYPE |
3384 | || TREE_CODE (new_type) == METHOD_TYPE) | |
2eed8e37 BK |
3385 | { |
3386 | new_type = build_exception_variant (new_type, | |
3387 | TYPE_RAISES_EXCEPTIONS (type)); | |
3388 | new_type = build_ref_qualified_type (new_type, | |
3389 | type_memfn_rqual (type)); | |
3390 | } | |
8e30dcf3 JM |
3391 | |
3392 | /* Making a new main variant of a class type is broken. */ | |
3393 | gcc_assert (!CLASS_TYPE_P (type) || new_type == type); | |
3394 | ||
e9525111 MM |
3395 | return new_type; |
3396 | } | |
3397 | ||
2dff8956 JJ |
3398 | /* Return TRUE if TYPE1 and TYPE2 are identical for type hashing purposes. |
3399 | Called only after doing all language independent checks. Only | |
3400 | to check TYPE_RAISES_EXCEPTIONS for FUNCTION_TYPE, the rest is already | |
3401 | compared in type_hash_eq. */ | |
3402 | ||
3403 | bool | |
3404 | cxx_type_hash_eq (const_tree typea, const_tree typeb) | |
3405 | { | |
220e83ca KT |
3406 | gcc_assert (TREE_CODE (typea) == FUNCTION_TYPE |
3407 | || TREE_CODE (typea) == METHOD_TYPE); | |
2dff8956 JJ |
3408 | |
3409 | return comp_except_specs (TYPE_RAISES_EXCEPTIONS (typea), | |
3a55fb4c | 3410 | TYPE_RAISES_EXCEPTIONS (typeb), ce_exact); |
2dff8956 JJ |
3411 | } |
3412 | ||
25af8512 | 3413 | /* Apply FUNC to all language-specific sub-trees of TP in a pre-order |
350fae66 | 3414 | traversal. Called from walk_tree. */ |
25af8512 | 3415 | |
9f63daea | 3416 | tree |
350fae66 | 3417 | cp_walk_subtrees (tree *tp, int *walk_subtrees_p, walk_tree_fn func, |
0c58f841 | 3418 | void *data, struct pointer_set_t *pset) |
25af8512 AO |
3419 | { |
3420 | enum tree_code code = TREE_CODE (*tp); | |
3421 | tree result; | |
9f63daea | 3422 | |
25af8512 AO |
3423 | #define WALK_SUBTREE(NODE) \ |
3424 | do \ | |
3425 | { \ | |
14588106 | 3426 | result = cp_walk_tree (&(NODE), func, data, pset); \ |
6de9cd9a | 3427 | if (result) goto out; \ |
25af8512 AO |
3428 | } \ |
3429 | while (0) | |
3430 | ||
3431 | /* Not one of the easy cases. We must explicitly go through the | |
3432 | children. */ | |
6de9cd9a | 3433 | result = NULL_TREE; |
25af8512 AO |
3434 | switch (code) |
3435 | { | |
3436 | case DEFAULT_ARG: | |
3437 | case TEMPLATE_TEMPLATE_PARM: | |
3438 | case BOUND_TEMPLATE_TEMPLATE_PARM: | |
b8c6534b | 3439 | case UNBOUND_CLASS_TEMPLATE: |
25af8512 AO |
3440 | case TEMPLATE_PARM_INDEX: |
3441 | case TEMPLATE_TYPE_PARM: | |
3442 | case TYPENAME_TYPE: | |
3443 | case TYPEOF_TYPE: | |
a0d260fc | 3444 | case UNDERLYING_TYPE: |
da1d7781 | 3445 | /* None of these have subtrees other than those already walked |
0cbd7506 | 3446 | above. */ |
25af8512 AO |
3447 | *walk_subtrees_p = 0; |
3448 | break; | |
3449 | ||
5d80a306 DG |
3450 | case BASELINK: |
3451 | WALK_SUBTREE (BASELINK_FUNCTIONS (*tp)); | |
3452 | *walk_subtrees_p = 0; | |
3453 | break; | |
3454 | ||
25af8512 AO |
3455 | case PTRMEM_CST: |
3456 | WALK_SUBTREE (TREE_TYPE (*tp)); | |
3457 | *walk_subtrees_p = 0; | |
3458 | break; | |
3459 | ||
3460 | case TREE_LIST: | |
5dae1114 | 3461 | WALK_SUBTREE (TREE_PURPOSE (*tp)); |
25af8512 AO |
3462 | break; |
3463 | ||
3464 | case OVERLOAD: | |
3465 | WALK_SUBTREE (OVL_FUNCTION (*tp)); | |
3466 | WALK_SUBTREE (OVL_CHAIN (*tp)); | |
3467 | *walk_subtrees_p = 0; | |
4439d02f DG |
3468 | break; |
3469 | ||
3470 | case USING_DECL: | |
3471 | WALK_SUBTREE (DECL_NAME (*tp)); | |
3472 | WALK_SUBTREE (USING_DECL_SCOPE (*tp)); | |
3473 | WALK_SUBTREE (USING_DECL_DECLS (*tp)); | |
3474 | *walk_subtrees_p = 0; | |
25af8512 AO |
3475 | break; |
3476 | ||
3477 | case RECORD_TYPE: | |
3478 | if (TYPE_PTRMEMFUNC_P (*tp)) | |
3479 | WALK_SUBTREE (TYPE_PTRMEMFUNC_FN_TYPE (*tp)); | |
3480 | break; | |
3481 | ||
5d80a306 DG |
3482 | case TYPE_ARGUMENT_PACK: |
3483 | case NONTYPE_ARGUMENT_PACK: | |
3484 | { | |
3485 | tree args = ARGUMENT_PACK_ARGS (*tp); | |
3486 | int i, len = TREE_VEC_LENGTH (args); | |
3487 | for (i = 0; i < len; i++) | |
3488 | WALK_SUBTREE (TREE_VEC_ELT (args, i)); | |
3489 | } | |
3490 | break; | |
3491 | ||
3492 | case TYPE_PACK_EXPANSION: | |
3493 | WALK_SUBTREE (TREE_TYPE (*tp)); | |
c67dd256 | 3494 | WALK_SUBTREE (PACK_EXPANSION_EXTRA_ARGS (*tp)); |
5d80a306 DG |
3495 | *walk_subtrees_p = 0; |
3496 | break; | |
3497 | ||
3498 | case EXPR_PACK_EXPANSION: | |
3499 | WALK_SUBTREE (TREE_OPERAND (*tp, 0)); | |
c67dd256 | 3500 | WALK_SUBTREE (PACK_EXPANSION_EXTRA_ARGS (*tp)); |
5d80a306 DG |
3501 | *walk_subtrees_p = 0; |
3502 | break; | |
3503 | ||
3504 | case CAST_EXPR: | |
a7cbc517 JJ |
3505 | case REINTERPRET_CAST_EXPR: |
3506 | case STATIC_CAST_EXPR: | |
3507 | case CONST_CAST_EXPR: | |
3508 | case DYNAMIC_CAST_EXPR: | |
a4474a38 | 3509 | case IMPLICIT_CONV_EXPR: |
5d80a306 DG |
3510 | if (TREE_TYPE (*tp)) |
3511 | WALK_SUBTREE (TREE_TYPE (*tp)); | |
3512 | ||
3513 | { | |
3514 | int i; | |
3515 | for (i = 0; i < TREE_CODE_LENGTH (TREE_CODE (*tp)); ++i) | |
3516 | WALK_SUBTREE (TREE_OPERAND (*tp, i)); | |
3517 | } | |
3518 | *walk_subtrees_p = 0; | |
3519 | break; | |
3520 | ||
cb68ec50 PC |
3521 | case TRAIT_EXPR: |
3522 | WALK_SUBTREE (TRAIT_EXPR_TYPE1 (*tp)); | |
3523 | WALK_SUBTREE (TRAIT_EXPR_TYPE2 (*tp)); | |
3524 | *walk_subtrees_p = 0; | |
3525 | break; | |
3526 | ||
3ad6a8e1 DG |
3527 | case DECLTYPE_TYPE: |
3528 | WALK_SUBTREE (DECLTYPE_TYPE_EXPR (*tp)); | |
3529 | *walk_subtrees_p = 0; | |
3530 | break; | |
3531 | ||
3532 | ||
25af8512 | 3533 | default: |
350fae66 | 3534 | return NULL_TREE; |
25af8512 AO |
3535 | } |
3536 | ||
3537 | /* We didn't find what we were looking for. */ | |
6de9cd9a | 3538 | out: |
6de9cd9a | 3539 | return result; |
25af8512 AO |
3540 | |
3541 | #undef WALK_SUBTREE | |
3542 | } | |
3543 | ||
b655f214 MM |
3544 | /* Like save_expr, but for C++. */ |
3545 | ||
3546 | tree | |
3547 | cp_save_expr (tree expr) | |
3548 | { | |
3549 | /* There is no reason to create a SAVE_EXPR within a template; if | |
3550 | needed, we can create the SAVE_EXPR when instantiating the | |
3551 | template. Furthermore, the middle-end cannot handle C++-specific | |
3552 | tree codes. */ | |
3553 | if (processing_template_decl) | |
3554 | return expr; | |
3555 | return save_expr (expr); | |
3556 | } | |
3557 | ||
87e3dbc9 MM |
3558 | /* Initialize tree.c. */ |
3559 | ||
0a818f84 | 3560 | void |
b57b79f7 | 3561 | init_tree (void) |
0a818f84 | 3562 | { |
e2500fed | 3563 | list_hash_table = htab_create_ggc (31, list_hash, list_hash_eq, NULL); |
0a818f84 GRK |
3564 | } |
3565 | ||
872f37f9 | 3566 | /* Returns the kind of special function that DECL (a FUNCTION_DECL) |
50ad9642 MM |
3567 | is. Note that sfk_none is zero, so this function can be used as a |
3568 | predicate to test whether or not DECL is a special function. */ | |
872f37f9 MM |
3569 | |
3570 | special_function_kind | |
58f9752a | 3571 | special_function_p (const_tree decl) |
872f37f9 MM |
3572 | { |
3573 | /* Rather than doing all this stuff with magic names, we should | |
3574 | probably have a field of type `special_function_kind' in | |
3575 | DECL_LANG_SPECIFIC. */ | |
85b5d65a JM |
3576 | if (DECL_INHERITED_CTOR_BASE (decl)) |
3577 | return sfk_inheriting_constructor; | |
872f37f9 MM |
3578 | if (DECL_COPY_CONSTRUCTOR_P (decl)) |
3579 | return sfk_copy_constructor; | |
d5f4eddd JM |
3580 | if (DECL_MOVE_CONSTRUCTOR_P (decl)) |
3581 | return sfk_move_constructor; | |
872f37f9 MM |
3582 | if (DECL_CONSTRUCTOR_P (decl)) |
3583 | return sfk_constructor; | |
596ea4e5 | 3584 | if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR) |
ac177431 JM |
3585 | { |
3586 | if (copy_fn_p (decl)) | |
3587 | return sfk_copy_assignment; | |
3588 | if (move_fn_p (decl)) | |
3589 | return sfk_move_assignment; | |
3590 | } | |
872f37f9 MM |
3591 | if (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl)) |
3592 | return sfk_destructor; | |
3593 | if (DECL_COMPLETE_DESTRUCTOR_P (decl)) | |
3594 | return sfk_complete_destructor; | |
3595 | if (DECL_BASE_DESTRUCTOR_P (decl)) | |
3596 | return sfk_base_destructor; | |
3597 | if (DECL_DELETING_DESTRUCTOR_P (decl)) | |
3598 | return sfk_deleting_destructor; | |
3599 | if (DECL_CONV_FN_P (decl)) | |
3600 | return sfk_conversion; | |
3601 | ||
3602 | return sfk_none; | |
3603 | } | |
7b019c19 | 3604 | |
838dfd8a | 3605 | /* Returns nonzero if TYPE is a character type, including wchar_t. */ |
7b019c19 MM |
3606 | |
3607 | int | |
b57b79f7 | 3608 | char_type_p (tree type) |
7b019c19 MM |
3609 | { |
3610 | return (same_type_p (type, char_type_node) | |
3611 | || same_type_p (type, unsigned_char_type_node) | |
3612 | || same_type_p (type, signed_char_type_node) | |
b6baa67d KVH |
3613 | || same_type_p (type, char16_type_node) |
3614 | || same_type_p (type, char32_type_node) | |
7b019c19 MM |
3615 | || same_type_p (type, wchar_type_node)); |
3616 | } | |
ad50e811 MM |
3617 | |
3618 | /* Returns the kind of linkage associated with the indicated DECL. Th | |
3619 | value returned is as specified by the language standard; it is | |
3620 | independent of implementation details regarding template | |
3621 | instantiation, etc. For example, it is possible that a declaration | |
3622 | to which this function assigns external linkage would not show up | |
3623 | as a global symbol when you run `nm' on the resulting object file. */ | |
3624 | ||
3625 | linkage_kind | |
b57b79f7 | 3626 | decl_linkage (tree decl) |
ad50e811 MM |
3627 | { |
3628 | /* This function doesn't attempt to calculate the linkage from first | |
3629 | principles as given in [basic.link]. Instead, it makes use of | |
3630 | the fact that we have already set TREE_PUBLIC appropriately, and | |
3631 | then handles a few special cases. Ideally, we would calculate | |
3632 | linkage first, and then transform that into a concrete | |
3633 | implementation. */ | |
3634 | ||
3635 | /* Things that don't have names have no linkage. */ | |
3636 | if (!DECL_NAME (decl)) | |
3637 | return lk_none; | |
3638 | ||
c02cdc25 TT |
3639 | /* Fields have no linkage. */ |
3640 | if (TREE_CODE (decl) == FIELD_DECL) | |
3641 | return lk_none; | |
3642 | ||
ad50e811 MM |
3643 | /* Things that are TREE_PUBLIC have external linkage. */ |
3644 | if (TREE_PUBLIC (decl)) | |
3645 | return lk_external; | |
3db45ab5 | 3646 | |
b70f0f48 JM |
3647 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
3648 | return lk_external; | |
3649 | ||
3db45ab5 | 3650 | /* Linkage of a CONST_DECL depends on the linkage of the enumeration |
3f774254 DB |
3651 | type. */ |
3652 | if (TREE_CODE (decl) == CONST_DECL) | |
8d0d1915 | 3653 | return decl_linkage (TYPE_NAME (DECL_CONTEXT (decl))); |
ad50e811 MM |
3654 | |
3655 | /* Some things that are not TREE_PUBLIC have external linkage, too. | |
3656 | For example, on targets that don't have weak symbols, we make all | |
3657 | template instantiations have internal linkage (in the object | |
3658 | file), but the symbols should still be treated as having external | |
3659 | linkage from the point of view of the language. */ | |
cb6da767 | 3660 | if (VAR_OR_FUNCTION_DECL_P (decl) |
b9e75696 | 3661 | && DECL_COMDAT (decl)) |
ad50e811 MM |
3662 | return lk_external; |
3663 | ||
3664 | /* Things in local scope do not have linkage, if they don't have | |
3665 | TREE_PUBLIC set. */ | |
3666 | if (decl_function_context (decl)) | |
3667 | return lk_none; | |
3668 | ||
b70f0f48 JM |
3669 | /* Members of the anonymous namespace also have TREE_PUBLIC unset, but |
3670 | are considered to have external linkage for language purposes. DECLs | |
3671 | really meant to have internal linkage have DECL_THIS_STATIC set. */ | |
ce41114b | 3672 | if (TREE_CODE (decl) == TYPE_DECL) |
b70f0f48 | 3673 | return lk_external; |
cb6da767 | 3674 | if (VAR_OR_FUNCTION_DECL_P (decl)) |
ce41114b JJ |
3675 | { |
3676 | if (!DECL_THIS_STATIC (decl)) | |
3677 | return lk_external; | |
3678 | ||
3679 | /* Static data members and static member functions from classes | |
3680 | in anonymous namespace also don't have TREE_PUBLIC set. */ | |
3681 | if (DECL_CLASS_CONTEXT (decl)) | |
3682 | return lk_external; | |
3683 | } | |
b70f0f48 | 3684 | |
ad50e811 MM |
3685 | /* Everything else has internal linkage. */ |
3686 | return lk_internal; | |
3687 | } | |
b95ca513 JM |
3688 | |
3689 | /* Returns the storage duration of the object or reference associated with | |
3690 | the indicated DECL, which should be a VAR_DECL or PARM_DECL. */ | |
3691 | ||
3692 | duration_kind | |
3693 | decl_storage_duration (tree decl) | |
3694 | { | |
3695 | if (TREE_CODE (decl) == PARM_DECL) | |
3696 | return dk_auto; | |
3697 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
3698 | return dk_static; | |
5a6ccc94 | 3699 | gcc_assert (VAR_P (decl)); |
b95ca513 JM |
3700 | if (!TREE_STATIC (decl) |
3701 | && !DECL_EXTERNAL (decl)) | |
3702 | return dk_auto; | |
3703 | if (DECL_THREAD_LOCAL_P (decl)) | |
3704 | return dk_thread; | |
3705 | return dk_static; | |
3706 | } | |
6f30f1f1 | 3707 | \f |
9beafc83 MM |
3708 | /* EXP is an expression that we want to pre-evaluate. Returns (in |
3709 | *INITP) an expression that will perform the pre-evaluation. The | |
3710 | value returned by this function is a side-effect free expression | |
3711 | equivalent to the pre-evaluated expression. Callers must ensure | |
3712 | that *INITP is evaluated before EXP. */ | |
6f30f1f1 JM |
3713 | |
3714 | tree | |
b57b79f7 | 3715 | stabilize_expr (tree exp, tree* initp) |
6f30f1f1 JM |
3716 | { |
3717 | tree init_expr; | |
3718 | ||
3719 | if (!TREE_SIDE_EFFECTS (exp)) | |
9beafc83 | 3720 | init_expr = NULL_TREE; |
982058cb PC |
3721 | else if (VOID_TYPE_P (TREE_TYPE (exp))) |
3722 | { | |
989e6706 JM |
3723 | init_expr = exp; |
3724 | exp = void_zero_node; | |
982058cb | 3725 | } |
e3edeff4 JM |
3726 | /* There are no expressions with REFERENCE_TYPE, but there can be call |
3727 | arguments with such a type; just treat it as a pointer. */ | |
3728 | else if (TREE_CODE (TREE_TYPE (exp)) == REFERENCE_TYPE | |
fa07d25b | 3729 | || SCALAR_TYPE_P (TREE_TYPE (exp)) |
883fff6c | 3730 | || !lvalue_or_rvalue_with_address_p (exp)) |
6f30f1f1 JM |
3731 | { |
3732 | init_expr = get_target_expr (exp); | |
3733 | exp = TARGET_EXPR_SLOT (init_expr); | |
3734 | } | |
3735 | else | |
3736 | { | |
883fff6c | 3737 | bool xval = !real_lvalue_p (exp); |
93c0e0bb | 3738 | exp = cp_build_addr_expr (exp, tf_warning_or_error); |
6f30f1f1 JM |
3739 | init_expr = get_target_expr (exp); |
3740 | exp = TARGET_EXPR_SLOT (init_expr); | |
dd865ef6 | 3741 | exp = cp_build_indirect_ref (exp, RO_NULL, tf_warning_or_error); |
883fff6c JM |
3742 | if (xval) |
3743 | exp = move (exp); | |
6f30f1f1 | 3744 | } |
6f30f1f1 | 3745 | *initp = init_expr; |
9beafc83 MM |
3746 | |
3747 | gcc_assert (!TREE_SIDE_EFFECTS (exp)); | |
6f30f1f1 JM |
3748 | return exp; |
3749 | } | |
6de9cd9a | 3750 | |
be93747e | 3751 | /* Add NEW_EXPR, an expression whose value we don't care about, after the |
40aac948 JM |
3752 | similar expression ORIG. */ |
3753 | ||
3754 | tree | |
be93747e | 3755 | add_stmt_to_compound (tree orig, tree new_expr) |
40aac948 | 3756 | { |
be93747e | 3757 | if (!new_expr || !TREE_SIDE_EFFECTS (new_expr)) |
40aac948 JM |
3758 | return orig; |
3759 | if (!orig || !TREE_SIDE_EFFECTS (orig)) | |
be93747e KG |
3760 | return new_expr; |
3761 | return build2 (COMPOUND_EXPR, void_type_node, orig, new_expr); | |
40aac948 JM |
3762 | } |
3763 | ||
9beafc83 MM |
3764 | /* Like stabilize_expr, but for a call whose arguments we want to |
3765 | pre-evaluate. CALL is modified in place to use the pre-evaluated | |
3766 | arguments, while, upon return, *INITP contains an expression to | |
3767 | compute the arguments. */ | |
6de9cd9a DN |
3768 | |
3769 | void | |
3770 | stabilize_call (tree call, tree *initp) | |
3771 | { | |
3772 | tree inits = NULL_TREE; | |
5039610b SL |
3773 | int i; |
3774 | int nargs = call_expr_nargs (call); | |
6de9cd9a | 3775 | |
28267cfc JJ |
3776 | if (call == error_mark_node || processing_template_decl) |
3777 | { | |
3778 | *initp = NULL_TREE; | |
3779 | return; | |
3780 | } | |
6de9cd9a | 3781 | |
5039610b | 3782 | gcc_assert (TREE_CODE (call) == CALL_EXPR); |
6de9cd9a | 3783 | |
5039610b SL |
3784 | for (i = 0; i < nargs; i++) |
3785 | { | |
3786 | tree init; | |
3787 | CALL_EXPR_ARG (call, i) = | |
3788 | stabilize_expr (CALL_EXPR_ARG (call, i), &init); | |
3789 | inits = add_stmt_to_compound (inits, init); | |
3790 | } | |
3791 | ||
3792 | *initp = inits; | |
3793 | } | |
3794 | ||
3795 | /* Like stabilize_expr, but for an AGGR_INIT_EXPR whose arguments we want | |
3796 | to pre-evaluate. CALL is modified in place to use the pre-evaluated | |
3797 | arguments, while, upon return, *INITP contains an expression to | |
3798 | compute the arguments. */ | |
3799 | ||
81bd268c | 3800 | static void |
5039610b SL |
3801 | stabilize_aggr_init (tree call, tree *initp) |
3802 | { | |
3803 | tree inits = NULL_TREE; | |
3804 | int i; | |
3805 | int nargs = aggr_init_expr_nargs (call); | |
3806 | ||
3807 | if (call == error_mark_node) | |
3808 | return; | |
3809 | ||
3810 | gcc_assert (TREE_CODE (call) == AGGR_INIT_EXPR); | |
3811 | ||
3812 | for (i = 0; i < nargs; i++) | |
3813 | { | |
3814 | tree init; | |
3815 | AGGR_INIT_EXPR_ARG (call, i) = | |
3816 | stabilize_expr (AGGR_INIT_EXPR_ARG (call, i), &init); | |
3817 | inits = add_stmt_to_compound (inits, init); | |
3818 | } | |
6de9cd9a DN |
3819 | |
3820 | *initp = inits; | |
3821 | } | |
3822 | ||
9beafc83 MM |
3823 | /* Like stabilize_expr, but for an initialization. |
3824 | ||
3825 | If the initialization is for an object of class type, this function | |
3826 | takes care not to introduce additional temporaries. | |
3827 | ||
3828 | Returns TRUE iff the expression was successfully pre-evaluated, | |
66edf32a | 3829 | i.e., if INIT is now side-effect free, except for, possibly, a |
9beafc83 | 3830 | single call to a constructor. */ |
6de9cd9a DN |
3831 | |
3832 | bool | |
3833 | stabilize_init (tree init, tree *initp) | |
3834 | { | |
3835 | tree t = init; | |
3836 | ||
9beafc83 MM |
3837 | *initp = NULL_TREE; |
3838 | ||
28267cfc | 3839 | if (t == error_mark_node || processing_template_decl) |
6de9cd9a DN |
3840 | return true; |
3841 | ||
9beafc83 MM |
3842 | if (TREE_CODE (t) == INIT_EXPR) |
3843 | t = TREE_OPERAND (t, 1); | |
3844 | if (TREE_CODE (t) == TARGET_EXPR) | |
3845 | t = TARGET_EXPR_INITIAL (t); | |
66edf32a JM |
3846 | |
3847 | /* If the RHS can be stabilized without breaking copy elision, stabilize | |
3848 | it. We specifically don't stabilize class prvalues here because that | |
3849 | would mean an extra copy, but they might be stabilized below. */ | |
3850 | if (TREE_CODE (init) == INIT_EXPR | |
3851 | && TREE_CODE (t) != CONSTRUCTOR | |
3852 | && TREE_CODE (t) != AGGR_INIT_EXPR | |
3853 | && (SCALAR_TYPE_P (TREE_TYPE (t)) | |
3854 | || lvalue_or_rvalue_with_address_p (t))) | |
3855 | { | |
3856 | TREE_OPERAND (init, 1) = stabilize_expr (t, initp); | |
3857 | return true; | |
3858 | } | |
3859 | ||
3860 | if (TREE_CODE (t) == COMPOUND_EXPR | |
3861 | && TREE_CODE (init) == INIT_EXPR) | |
3862 | { | |
3863 | tree last = expr_last (t); | |
3864 | /* Handle stabilizing the EMPTY_CLASS_EXPR pattern. */ | |
3865 | if (!TREE_SIDE_EFFECTS (last)) | |
3866 | { | |
3867 | *initp = t; | |
3868 | TREE_OPERAND (init, 1) = last; | |
3869 | return true; | |
3870 | } | |
3871 | } | |
3872 | ||
b9d6b015 JM |
3873 | if (TREE_CODE (t) == CONSTRUCTOR) |
3874 | { | |
3875 | /* Aggregate initialization: stabilize each of the field | |
3876 | initializers. */ | |
3877 | unsigned i; | |
0c59fd2f | 3878 | constructor_elt *ce; |
b9d6b015 | 3879 | bool good = true; |
9771b263 DN |
3880 | vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (t); |
3881 | for (i = 0; vec_safe_iterate (v, i, &ce); ++i) | |
0c59fd2f JM |
3882 | { |
3883 | tree type = TREE_TYPE (ce->value); | |
3884 | tree subinit; | |
3885 | if (TREE_CODE (type) == REFERENCE_TYPE | |
3886 | || SCALAR_TYPE_P (type)) | |
3887 | ce->value = stabilize_expr (ce->value, &subinit); | |
3888 | else if (!stabilize_init (ce->value, &subinit)) | |
3889 | good = false; | |
3890 | *initp = add_stmt_to_compound (*initp, subinit); | |
3891 | } | |
b9d6b015 JM |
3892 | return good; |
3893 | } | |
9beafc83 | 3894 | |
5039610b | 3895 | if (TREE_CODE (t) == CALL_EXPR) |
9beafc83 MM |
3896 | { |
3897 | stabilize_call (t, initp); | |
3898 | return true; | |
6de9cd9a DN |
3899 | } |
3900 | ||
5039610b SL |
3901 | if (TREE_CODE (t) == AGGR_INIT_EXPR) |
3902 | { | |
3903 | stabilize_aggr_init (t, initp); | |
3904 | return true; | |
3905 | } | |
3906 | ||
9beafc83 MM |
3907 | /* The initialization is being performed via a bitwise copy -- and |
3908 | the item copied may have side effects. */ | |
4bbbcbf6 | 3909 | return !TREE_SIDE_EFFECTS (init); |
6de9cd9a DN |
3910 | } |
3911 | ||
455f19cb MM |
3912 | /* Like "fold", but should be used whenever we might be processing the |
3913 | body of a template. */ | |
3914 | ||
3915 | tree | |
3916 | fold_if_not_in_template (tree expr) | |
3917 | { | |
3918 | /* In the body of a template, there is never any need to call | |
3919 | "fold". We will call fold later when actually instantiating the | |
3920 | template. Integral constant expressions in templates will be | |
f9f1c24e | 3921 | evaluated via fold_non_dependent_expr, as necessary. */ |
392e3d51 RS |
3922 | if (processing_template_decl) |
3923 | return expr; | |
3924 | ||
3925 | /* Fold C++ front-end specific tree codes. */ | |
3926 | if (TREE_CODE (expr) == UNARY_PLUS_EXPR) | |
3927 | return fold_convert (TREE_TYPE (expr), TREE_OPERAND (expr, 0)); | |
3928 | ||
3929 | return fold (expr); | |
455f19cb MM |
3930 | } |
3931 | ||
015c2c66 MM |
3932 | /* Returns true if a cast to TYPE may appear in an integral constant |
3933 | expression. */ | |
3934 | ||
3935 | bool | |
3936 | cast_valid_in_integral_constant_expression_p (tree type) | |
3937 | { | |
3938 | return (INTEGRAL_OR_ENUMERATION_TYPE_P (type) | |
fa2200cb | 3939 | || cxx_dialect >= cxx0x |
015c2c66 MM |
3940 | || dependent_type_p (type) |
3941 | || type == error_mark_node); | |
3942 | } | |
3943 | ||
4537ec0c DN |
3944 | /* Return true if we need to fix linkage information of DECL. */ |
3945 | ||
3946 | static bool | |
3947 | cp_fix_function_decl_p (tree decl) | |
3948 | { | |
3949 | /* Skip if DECL is not externally visible. */ | |
3950 | if (!TREE_PUBLIC (decl)) | |
3951 | return false; | |
3952 | ||
3953 | /* We need to fix DECL if it a appears to be exported but with no | |
3954 | function body. Thunks do not have CFGs and we may need to | |
3955 | handle them specially later. */ | |
3956 | if (!gimple_has_body_p (decl) | |
3957 | && !DECL_THUNK_P (decl) | |
3958 | && !DECL_EXTERNAL (decl)) | |
87501227 JJ |
3959 | { |
3960 | struct cgraph_node *node = cgraph_get_node (decl); | |
3961 | ||
3962 | /* Don't fix same_body aliases. Although they don't have their own | |
3963 | CFG, they share it with what they alias to. */ | |
39e2db00 | 3964 | if (!node || !node->alias |
9771b263 | 3965 | || !vec_safe_length (node->symbol.ref_list.references)) |
87501227 JJ |
3966 | return true; |
3967 | } | |
4537ec0c DN |
3968 | |
3969 | return false; | |
3970 | } | |
3971 | ||
3972 | /* Clean the C++ specific parts of the tree T. */ | |
3973 | ||
3974 | void | |
3975 | cp_free_lang_data (tree t) | |
3976 | { | |
3977 | if (TREE_CODE (t) == METHOD_TYPE | |
3978 | || TREE_CODE (t) == FUNCTION_TYPE) | |
3979 | { | |
3980 | /* Default args are not interesting anymore. */ | |
3981 | tree argtypes = TYPE_ARG_TYPES (t); | |
3982 | while (argtypes) | |
3983 | { | |
3984 | TREE_PURPOSE (argtypes) = 0; | |
3985 | argtypes = TREE_CHAIN (argtypes); | |
3986 | } | |
3987 | } | |
3988 | else if (TREE_CODE (t) == FUNCTION_DECL | |
3989 | && cp_fix_function_decl_p (t)) | |
3990 | { | |
3991 | /* If T is used in this translation unit at all, the definition | |
3992 | must exist somewhere else since we have decided to not emit it | |
3993 | in this TU. So make it an external reference. */ | |
3994 | DECL_EXTERNAL (t) = 1; | |
3995 | TREE_STATIC (t) = 0; | |
3996 | } | |
b4ca4f9e RG |
3997 | if (TREE_CODE (t) == NAMESPACE_DECL) |
3998 | { | |
3999 | /* The list of users of a namespace isn't useful for the middle-end | |
4000 | or debug generators. */ | |
4001 | DECL_NAMESPACE_USERS (t) = NULL_TREE; | |
4002 | /* Neither do we need the leftover chaining of namespaces | |
4003 | from the binding level. */ | |
4004 | DECL_CHAIN (t) = NULL_TREE; | |
4005 | } | |
4537ec0c DN |
4006 | } |
4007 | ||
bffad7f1 SB |
4008 | /* Stub for c-common. Please keep in sync with c-decl.c. |
4009 | FIXME: If address space support is target specific, then this | |
4010 | should be a C target hook. But currently this is not possible, | |
4011 | because this function is called via REGISTER_TARGET_PRAGMAS. */ | |
4012 | void | |
12308bc6 | 4013 | c_register_addr_space (const char * /*word*/, addr_space_t /*as*/) |
bffad7f1 SB |
4014 | { |
4015 | } | |
4016 | ||
d26e5986 NF |
4017 | /* Return the number of operands in T that we care about for things like |
4018 | mangling. */ | |
4019 | ||
4020 | int | |
4021 | cp_tree_operand_length (const_tree t) | |
4022 | { | |
4023 | enum tree_code code = TREE_CODE (t); | |
4024 | ||
4025 | switch (code) | |
4026 | { | |
4027 | case PREINCREMENT_EXPR: | |
4028 | case PREDECREMENT_EXPR: | |
4029 | case POSTINCREMENT_EXPR: | |
4030 | case POSTDECREMENT_EXPR: | |
4031 | return 1; | |
4032 | ||
4033 | case ARRAY_REF: | |
4034 | return 2; | |
4035 | ||
4036 | case EXPR_PACK_EXPANSION: | |
4037 | return 1; | |
4038 | ||
4039 | default: | |
4040 | return TREE_OPERAND_LENGTH (t); | |
4041 | } | |
4042 | } | |
30b07d03 PC |
4043 | |
4044 | /* Implement -Wzero_as_null_pointer_constant. Return true if the | |
4045 | conditions for the warning hold, false otherwise. */ | |
4046 | bool | |
4047 | maybe_warn_zero_as_null_pointer_constant (tree expr, location_t loc) | |
4048 | { | |
4049 | if (c_inhibit_evaluation_warnings == 0 | |
4050 | && !NULLPTR_TYPE_P (TREE_TYPE (expr))) | |
4051 | { | |
4052 | warning_at (loc, OPT_Wzero_as_null_pointer_constant, | |
4053 | "zero as null pointer constant"); | |
4054 | return true; | |
4055 | } | |
4056 | return false; | |
4057 | } | |
e2500fed GK |
4058 | \f |
4059 | #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007) | |
4060 | /* Complain that some language-specific thing hanging off a tree | |
4061 | node has been accessed improperly. */ | |
4062 | ||
4063 | void | |
b57b79f7 | 4064 | lang_check_failed (const char* file, int line, const char* function) |
e2500fed GK |
4065 | { |
4066 | internal_error ("lang_* check: failed in %s, at %s:%d", | |
4067 | function, trim_filename (file), line); | |
4068 | } | |
4069 | #endif /* ENABLE_TREE_CHECKING */ | |
4070 | ||
4071 | #include "gt-cp-tree.h" |