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8d08fdba | 1 | /* Language-dependent node constructors for parse phase of GNU compiler. |
23a5b65a | 2 | Copyright (C) 1987-2014 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 | 25 | #include "tree.h" |
d8a2d370 DN |
26 | #include "stor-layout.h" |
27 | #include "print-tree.h" | |
28 | #include "tree-iterator.h" | |
8d08fdba MS |
29 | #include "cp-tree.h" |
30 | #include "flags.h" | |
25af8512 | 31 | #include "tree-inline.h" |
e58a9aa1 | 32 | #include "debug.h" |
41990f96 | 33 | #include "convert.h" |
87501227 | 34 | #include "cgraph.h" |
245763e3 | 35 | #include "splay-tree.h" |
703c8606 | 36 | #include "hash-table.h" |
2fb9a547 AM |
37 | #include "gimple-expr.h" |
38 | #include "gimplify.h" | |
807e902e | 39 | #include "wide-int.h" |
12027a89 | 40 | |
b57b79f7 NN |
41 | static tree bot_manip (tree *, int *, void *); |
42 | static tree bot_replace (tree *, int *, void *); | |
b57b79f7 NN |
43 | static int list_hash_eq (const void *, const void *); |
44 | static hashval_t list_hash_pieces (tree, tree, tree); | |
45 | static hashval_t list_hash (const void *); | |
574cfaa4 | 46 | static tree build_target_expr (tree, tree, tsubst_flags_t); |
b57b79f7 NN |
47 | static tree count_trees_r (tree *, int *, void *); |
48 | static tree verify_stmt_tree_r (tree *, int *, void *); | |
a6f86b51 | 49 | static tree build_local_temp (tree); |
b57b79f7 NN |
50 | |
51 | static tree handle_java_interface_attribute (tree *, tree, tree, int, bool *); | |
52 | static tree handle_com_interface_attribute (tree *, tree, tree, int, bool *); | |
53 | static tree handle_init_priority_attribute (tree *, tree, tree, int, bool *); | |
7dbb85a7 | 54 | static tree handle_abi_tag_attribute (tree *, tree, tree, int, bool *); |
91d231cb | 55 | |
27b8d0cd | 56 | /* If REF is an lvalue, returns the kind of lvalue that REF is. |
df5c89cb | 57 | Otherwise, returns clk_none. */ |
8d08fdba | 58 | |
4e9ca9b0 JM |
59 | cp_lvalue_kind |
60 | lvalue_kind (const_tree ref) | |
8ccc31eb | 61 | { |
27b8d0cd MM |
62 | cp_lvalue_kind op1_lvalue_kind = clk_none; |
63 | cp_lvalue_kind op2_lvalue_kind = clk_none; | |
64 | ||
8af2fec4 RY |
65 | /* Expressions of reference type are sometimes wrapped in |
66 | INDIRECT_REFs. INDIRECT_REFs are just internal compiler | |
67 | representation, not part of the language, so we have to look | |
68 | through them. */ | |
31e292c7 | 69 | if (REFERENCE_REF_P (ref)) |
4e9ca9b0 | 70 | return lvalue_kind (TREE_OPERAND (ref, 0)); |
8af2fec4 | 71 | |
8810610e JJ |
72 | if (TREE_TYPE (ref) |
73 | && TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE) | |
8af2fec4 RY |
74 | { |
75 | /* unnamed rvalue references are rvalues */ | |
76 | if (TYPE_REF_IS_RVALUE (TREE_TYPE (ref)) | |
77 | && TREE_CODE (ref) != PARM_DECL | |
5a6ccc94 | 78 | && !VAR_P (ref) |
b24290fb JM |
79 | && TREE_CODE (ref) != COMPONENT_REF |
80 | /* Functions are always lvalues. */ | |
81 | && TREE_CODE (TREE_TYPE (TREE_TYPE (ref))) != FUNCTION_TYPE) | |
df5c89cb | 82 | return clk_rvalueref; |
8af2fec4 | 83 | |
d732e98f | 84 | /* lvalue references and named rvalue references are lvalues. */ |
8af2fec4 RY |
85 | return clk_ordinary; |
86 | } | |
8ccc31eb | 87 | |
394fd776 | 88 | if (ref == current_class_ptr) |
27b8d0cd | 89 | return clk_none; |
8ccc31eb MS |
90 | |
91 | switch (TREE_CODE (ref)) | |
92 | { | |
8f4361eb AP |
93 | case SAVE_EXPR: |
94 | return clk_none; | |
8ccc31eb | 95 | /* preincrements and predecrements are valid lvals, provided |
e92cc029 | 96 | what they refer to are valid lvals. */ |
8ccc31eb MS |
97 | case PREINCREMENT_EXPR: |
98 | case PREDECREMENT_EXPR: | |
c7ae64f2 JM |
99 | case TRY_CATCH_EXPR: |
100 | case WITH_CLEANUP_EXPR: | |
69851283 MM |
101 | case REALPART_EXPR: |
102 | case IMAGPART_EXPR: | |
4e9ca9b0 | 103 | return lvalue_kind (TREE_OPERAND (ref, 0)); |
8ccc31eb | 104 | |
949bd6c8 JM |
105 | case MEMBER_REF: |
106 | case DOTSTAR_EXPR: | |
107 | if (TREE_CODE (ref) == MEMBER_REF) | |
108 | op1_lvalue_kind = clk_ordinary; | |
109 | else | |
110 | op1_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 0)); | |
111 | if (TYPE_PTRMEMFUNC_P (TREE_TYPE (TREE_OPERAND (ref, 1)))) | |
112 | op1_lvalue_kind = clk_none; | |
113 | return op1_lvalue_kind; | |
114 | ||
27b8d0cd | 115 | case COMPONENT_REF: |
4e9ca9b0 | 116 | op1_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 0)); |
c8b2e872 | 117 | /* Look at the member designator. */ |
4af9e878 | 118 | if (!op1_lvalue_kind) |
0cbd7506 | 119 | ; |
4af9e878 JM |
120 | else if (is_overloaded_fn (TREE_OPERAND (ref, 1))) |
121 | /* The "field" can be a FUNCTION_DECL or an OVERLOAD in some | |
b7da27c2 JM |
122 | situations. If we're seeing a COMPONENT_REF, it's a non-static |
123 | member, so it isn't an lvalue. */ | |
124 | op1_lvalue_kind = clk_none; | |
125 | else if (TREE_CODE (TREE_OPERAND (ref, 1)) != FIELD_DECL) | |
126 | /* This can be IDENTIFIER_NODE in a template. */; | |
e0d1297c | 127 | else if (DECL_C_BIT_FIELD (TREE_OPERAND (ref, 1))) |
27b8d0cd MM |
128 | { |
129 | /* Clear the ordinary bit. If this object was a class | |
130 | rvalue we want to preserve that information. */ | |
131 | op1_lvalue_kind &= ~clk_ordinary; | |
cd0be382 | 132 | /* The lvalue is for a bitfield. */ |
27b8d0cd MM |
133 | op1_lvalue_kind |= clk_bitfield; |
134 | } | |
e0d1297c NS |
135 | else if (DECL_PACKED (TREE_OPERAND (ref, 1))) |
136 | op1_lvalue_kind |= clk_packed; | |
9f63daea | 137 | |
27b8d0cd MM |
138 | return op1_lvalue_kind; |
139 | ||
8ccc31eb | 140 | case STRING_CST: |
266b4890 | 141 | case COMPOUND_LITERAL_EXPR: |
27b8d0cd | 142 | return clk_ordinary; |
8ccc31eb | 143 | |
e58a9aa1 | 144 | case CONST_DECL: |
4b8c1a92 JJ |
145 | /* CONST_DECL without TREE_STATIC are enumeration values and |
146 | thus not lvalues. With TREE_STATIC they are used by ObjC++ | |
147 | in objc_build_string_object and need to be considered as | |
148 | lvalues. */ | |
149 | if (! TREE_STATIC (ref)) | |
150 | return clk_none; | |
8ccc31eb MS |
151 | case VAR_DECL: |
152 | if (TREE_READONLY (ref) && ! TREE_STATIC (ref) | |
153 | && DECL_LANG_SPECIFIC (ref) | |
154 | && DECL_IN_AGGR_P (ref)) | |
27b8d0cd | 155 | return clk_none; |
8ccc31eb | 156 | case INDIRECT_REF: |
e87b4dde | 157 | case ARROW_EXPR: |
8ccc31eb | 158 | case ARRAY_REF: |
2ce86d2e | 159 | case ARRAY_NOTATION_REF: |
8ccc31eb MS |
160 | case PARM_DECL: |
161 | case RESULT_DECL: | |
ea48c8a0 | 162 | return clk_ordinary; |
8ccc31eb | 163 | |
3ee353e9 JM |
164 | /* A scope ref in a template, left as SCOPE_REF to support later |
165 | access checking. */ | |
8ccc31eb | 166 | case SCOPE_REF: |
c5c8755a JM |
167 | gcc_assert (!type_dependent_expression_p (CONST_CAST_TREE (ref))); |
168 | { | |
169 | tree op = TREE_OPERAND (ref, 1); | |
170 | if (TREE_CODE (op) == FIELD_DECL) | |
171 | return (DECL_C_BIT_FIELD (op) ? clk_bitfield : clk_ordinary); | |
172 | else | |
173 | return lvalue_kind (op); | |
174 | } | |
3ee353e9 | 175 | |
27b8d0cd MM |
176 | case MAX_EXPR: |
177 | case MIN_EXPR: | |
d211a298 RS |
178 | /* Disallow <? and >? as lvalues if either argument side-effects. */ |
179 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (ref, 0)) | |
180 | || TREE_SIDE_EFFECTS (TREE_OPERAND (ref, 1))) | |
181 | return clk_none; | |
4e9ca9b0 JM |
182 | op1_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 0)); |
183 | op2_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 1)); | |
8ccc31eb MS |
184 | break; |
185 | ||
186 | case COND_EXPR: | |
4e9ca9b0 | 187 | op1_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 1) |
42924ed7 | 188 | ? TREE_OPERAND (ref, 1) |
df5c89cb | 189 | : TREE_OPERAND (ref, 0)); |
4e9ca9b0 | 190 | op2_lvalue_kind = lvalue_kind (TREE_OPERAND (ref, 2)); |
27b8d0cd | 191 | break; |
8ccc31eb MS |
192 | |
193 | case MODIFY_EXPR: | |
e87b4dde | 194 | case TYPEID_EXPR: |
27b8d0cd | 195 | return clk_ordinary; |
8ccc31eb MS |
196 | |
197 | case COMPOUND_EXPR: | |
4e9ca9b0 | 198 | return lvalue_kind (TREE_OPERAND (ref, 1)); |
69851283 MM |
199 | |
200 | case TARGET_EXPR: | |
df5c89cb | 201 | return clk_class; |
69851283 | 202 | |
356955cf | 203 | case VA_ARG_EXPR: |
df5c89cb | 204 | return (CLASS_TYPE_P (TREE_TYPE (ref)) ? clk_class : clk_none); |
c0ad5a31 MM |
205 | |
206 | case CALL_EXPR: | |
e87b4dde JM |
207 | /* We can see calls outside of TARGET_EXPR in templates. */ |
208 | if (CLASS_TYPE_P (TREE_TYPE (ref))) | |
209 | return clk_class; | |
4e8dca1c | 210 | return clk_none; |
69851283 MM |
211 | |
212 | case FUNCTION_DECL: | |
213 | /* All functions (except non-static-member functions) are | |
214 | lvalues. */ | |
9f63daea | 215 | return (DECL_NONSTATIC_MEMBER_FUNCTION_P (ref) |
27b8d0cd | 216 | ? clk_none : clk_ordinary); |
7f85441b | 217 | |
4af9e878 JM |
218 | case BASELINK: |
219 | /* We now represent a reference to a single static member function | |
220 | with a BASELINK. */ | |
1e4ae551 MLI |
221 | /* This CONST_CAST is okay because BASELINK_FUNCTIONS returns |
222 | its argument unmodified and we assign it to a const_tree. */ | |
4e9ca9b0 | 223 | return lvalue_kind (BASELINK_FUNCTIONS (CONST_CAST_TREE (ref))); |
4af9e878 | 224 | |
d17811fd | 225 | case NON_DEPENDENT_EXPR: |
ca8dc274 JM |
226 | /* We just return clk_ordinary for NON_DEPENDENT_EXPR in C++98, but |
227 | in C++11 lvalues don't bind to rvalue references, so we need to | |
228 | work harder to avoid bogus errors (c++/44870). */ | |
604b2bfc | 229 | if (cxx_dialect < cxx11) |
ca8dc274 JM |
230 | return clk_ordinary; |
231 | else | |
232 | return lvalue_kind (TREE_OPERAND (ref, 0)); | |
d17811fd | 233 | |
7f85441b | 234 | default: |
e87b4dde JM |
235 | if (!TREE_TYPE (ref)) |
236 | return clk_none; | |
237 | if (CLASS_TYPE_P (TREE_TYPE (ref))) | |
238 | return clk_class; | |
7f85441b | 239 | break; |
8ccc31eb MS |
240 | } |
241 | ||
27b8d0cd MM |
242 | /* If one operand is not an lvalue at all, then this expression is |
243 | not an lvalue. */ | |
244 | if (!op1_lvalue_kind || !op2_lvalue_kind) | |
245 | return clk_none; | |
246 | ||
247 | /* Otherwise, it's an lvalue, and it has all the odd properties | |
248 | contributed by either operand. */ | |
249 | op1_lvalue_kind = op1_lvalue_kind | op2_lvalue_kind; | |
9771799c | 250 | /* It's not an ordinary lvalue if it involves any other kind. */ |
27b8d0cd MM |
251 | if ((op1_lvalue_kind & ~clk_ordinary) != clk_none) |
252 | op1_lvalue_kind &= ~clk_ordinary; | |
9771799c JM |
253 | /* It can't be both a pseudo-lvalue and a non-addressable lvalue. |
254 | A COND_EXPR of those should be wrapped in a TARGET_EXPR. */ | |
255 | if ((op1_lvalue_kind & (clk_rvalueref|clk_class)) | |
256 | && (op1_lvalue_kind & (clk_bitfield|clk_packed))) | |
257 | op1_lvalue_kind = clk_none; | |
27b8d0cd | 258 | return op1_lvalue_kind; |
8ccc31eb MS |
259 | } |
260 | ||
aa6e8ed3 MM |
261 | /* Returns the kind of lvalue that REF is, in the sense of |
262 | [basic.lval]. This function should really be named lvalue_p; it | |
263 | computes the C++ definition of lvalue. */ | |
264 | ||
265 | cp_lvalue_kind | |
4e9ca9b0 | 266 | real_lvalue_p (const_tree ref) |
aa6e8ed3 | 267 | { |
4e9ca9b0 | 268 | cp_lvalue_kind kind = lvalue_kind (ref); |
df5c89cb JM |
269 | if (kind & (clk_rvalueref|clk_class)) |
270 | return clk_none; | |
271 | else | |
272 | return kind; | |
aa6e8ed3 MM |
273 | } |
274 | ||
df5c89cb JM |
275 | /* This differs from real_lvalue_p in that class rvalues are considered |
276 | lvalues. */ | |
69851283 | 277 | |
1e4ae551 MLI |
278 | bool |
279 | lvalue_p (const_tree ref) | |
8d08fdba | 280 | { |
4e9ca9b0 | 281 | return (lvalue_kind (ref) != clk_none); |
df5c89cb JM |
282 | } |
283 | ||
284 | /* This differs from real_lvalue_p in that rvalues formed by dereferencing | |
285 | rvalue references are considered rvalues. */ | |
286 | ||
287 | bool | |
288 | lvalue_or_rvalue_with_address_p (const_tree ref) | |
289 | { | |
4e9ca9b0 | 290 | cp_lvalue_kind kind = lvalue_kind (ref); |
df5c89cb JM |
291 | if (kind & clk_class) |
292 | return false; | |
293 | else | |
294 | return (kind != clk_none); | |
6c6e776d MA |
295 | } |
296 | ||
04398fa8 PC |
297 | /* Returns true if REF is an xvalue, false otherwise. */ |
298 | ||
299 | bool | |
300 | xvalue_p (const_tree ref) | |
301 | { | |
302 | return (lvalue_kind (ref) == clk_rvalueref); | |
303 | } | |
304 | ||
100d337a MA |
305 | /* Test whether DECL is a builtin that may appear in a |
306 | constant-expression. */ | |
307 | ||
308 | bool | |
58f9752a | 309 | builtin_valid_in_constant_expr_p (const_tree decl) |
100d337a MA |
310 | { |
311 | /* At present BUILT_IN_CONSTANT_P is the only builtin we're allowing | |
312 | in constant-expressions. We may want to add other builtins later. */ | |
88a7beb7 | 313 | return DECL_IS_BUILTIN_CONSTANT_P (decl); |
100d337a MA |
314 | } |
315 | ||
c506ca22 MM |
316 | /* Build a TARGET_EXPR, initializing the DECL with the VALUE. */ |
317 | ||
318 | static tree | |
574cfaa4 | 319 | build_target_expr (tree decl, tree value, tsubst_flags_t complain) |
c506ca22 MM |
320 | { |
321 | tree t; | |
30fdd4f2 | 322 | tree type = TREE_TYPE (decl); |
04941f76 AO |
323 | |
324 | #ifdef ENABLE_CHECKING | |
325 | gcc_assert (VOID_TYPE_P (TREE_TYPE (value)) | |
326 | || TREE_TYPE (decl) == TREE_TYPE (value) | |
22d60ad2 | 327 | /* On ARM ctors return 'this'. */ |
50e10fa8 | 328 | || (TYPE_PTR_P (TREE_TYPE (value)) |
22d60ad2 | 329 | && TREE_CODE (value) == CALL_EXPR) |
04941f76 AO |
330 | || useless_type_conversion_p (TREE_TYPE (decl), |
331 | TREE_TYPE (value))); | |
332 | #endif | |
c506ca22 | 333 | |
574cfaa4 JM |
334 | t = cxx_maybe_build_cleanup (decl, complain); |
335 | if (t == error_mark_node) | |
336 | return error_mark_node; | |
30fdd4f2 | 337 | t = build4 (TARGET_EXPR, type, decl, value, t, NULL_TREE); |
c506ca22 MM |
338 | /* We always set TREE_SIDE_EFFECTS so that expand_expr does not |
339 | ignore the TARGET_EXPR. If there really turn out to be no | |
340 | side-effects, then the optimizer should be able to get rid of | |
341 | whatever code is generated anyhow. */ | |
342 | TREE_SIDE_EFFECTS (t) = 1; | |
343 | ||
344 | return t; | |
345 | } | |
346 | ||
a6f86b51 JM |
347 | /* Return an undeclared local temporary of type TYPE for use in building a |
348 | TARGET_EXPR. */ | |
349 | ||
350 | static tree | |
351 | build_local_temp (tree type) | |
352 | { | |
c2255bc4 AH |
353 | tree slot = build_decl (input_location, |
354 | VAR_DECL, NULL_TREE, type); | |
a6f86b51 | 355 | DECL_ARTIFICIAL (slot) = 1; |
78e0d62b | 356 | DECL_IGNORED_P (slot) = 1; |
a6f86b51 JM |
357 | DECL_CONTEXT (slot) = current_function_decl; |
358 | layout_decl (slot, 0); | |
359 | return slot; | |
360 | } | |
361 | ||
5039610b SL |
362 | /* Set various status flags when building an AGGR_INIT_EXPR object T. */ |
363 | ||
364 | static void | |
365 | process_aggr_init_operands (tree t) | |
366 | { | |
367 | bool side_effects; | |
368 | ||
369 | side_effects = TREE_SIDE_EFFECTS (t); | |
370 | if (!side_effects) | |
371 | { | |
372 | int i, n; | |
373 | n = TREE_OPERAND_LENGTH (t); | |
374 | for (i = 1; i < n; i++) | |
375 | { | |
376 | tree op = TREE_OPERAND (t, i); | |
377 | if (op && TREE_SIDE_EFFECTS (op)) | |
378 | { | |
379 | side_effects = 1; | |
380 | break; | |
381 | } | |
382 | } | |
383 | } | |
384 | TREE_SIDE_EFFECTS (t) = side_effects; | |
385 | } | |
386 | ||
387 | /* Build an AGGR_INIT_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE, | |
388 | FN, and SLOT. NARGS is the number of call arguments which are specified | |
389 | as a tree array ARGS. */ | |
390 | ||
391 | static tree | |
392 | build_aggr_init_array (tree return_type, tree fn, tree slot, int nargs, | |
393 | tree *args) | |
394 | { | |
395 | tree t; | |
396 | int i; | |
397 | ||
398 | t = build_vl_exp (AGGR_INIT_EXPR, nargs + 3); | |
399 | TREE_TYPE (t) = return_type; | |
400 | AGGR_INIT_EXPR_FN (t) = fn; | |
401 | AGGR_INIT_EXPR_SLOT (t) = slot; | |
402 | for (i = 0; i < nargs; i++) | |
403 | AGGR_INIT_EXPR_ARG (t, i) = args[i]; | |
404 | process_aggr_init_operands (t); | |
405 | return t; | |
406 | } | |
407 | ||
408 | /* INIT is a CALL_EXPR or AGGR_INIT_EXPR which needs info about its | |
844ae01d | 409 | target. TYPE is the type to be initialized. |
8d08fdba | 410 | |
844ae01d JM |
411 | Build an AGGR_INIT_EXPR to represent the initialization. This function |
412 | differs from build_cplus_new in that an AGGR_INIT_EXPR can only be used | |
413 | to initialize another object, whereas a TARGET_EXPR can either | |
414 | initialize another object or create its own temporary object, and as a | |
415 | result building up a TARGET_EXPR requires that the type's destructor be | |
416 | callable. */ | |
e92cc029 | 417 | |
8d08fdba | 418 | tree |
094484e7 | 419 | build_aggr_init_expr (tree type, tree init) |
8d08fdba | 420 | { |
e1376b00 | 421 | tree fn; |
e8abc66f MS |
422 | tree slot; |
423 | tree rval; | |
4977bab6 | 424 | int is_ctor; |
e8abc66f | 425 | |
e4d7d8cb JM |
426 | /* Don't build AGGR_INIT_EXPR in a template. */ |
427 | if (processing_template_decl) | |
428 | return init; | |
429 | ||
5039610b SL |
430 | if (TREE_CODE (init) == CALL_EXPR) |
431 | fn = CALL_EXPR_FN (init); | |
432 | else if (TREE_CODE (init) == AGGR_INIT_EXPR) | |
433 | fn = AGGR_INIT_EXPR_FN (init); | |
434 | else | |
06126ca2 | 435 | return convert (type, init); |
c11b6f21 | 436 | |
4977bab6 ZW |
437 | is_ctor = (TREE_CODE (fn) == ADDR_EXPR |
438 | && TREE_CODE (TREE_OPERAND (fn, 0)) == FUNCTION_DECL | |
439 | && DECL_CONSTRUCTOR_P (TREE_OPERAND (fn, 0))); | |
440 | ||
e1376b00 MM |
441 | /* We split the CALL_EXPR into its function and its arguments here. |
442 | Then, in expand_expr, we put them back together. The reason for | |
443 | this is that this expression might be a default argument | |
444 | expression. In that case, we need a new temporary every time the | |
445 | expression is used. That's what break_out_target_exprs does; it | |
446 | replaces every AGGR_INIT_EXPR with a copy that uses a fresh | |
447 | temporary slot. Then, expand_expr builds up a call-expression | |
448 | using the new slot. */ | |
4977bab6 ZW |
449 | |
450 | /* If we don't need to use a constructor to create an object of this | |
451 | type, don't mess with AGGR_INIT_EXPR. */ | |
452 | if (is_ctor || TREE_ADDRESSABLE (type)) | |
453 | { | |
844ae01d JM |
454 | slot = build_local_temp (type); |
455 | ||
5039610b SL |
456 | if (TREE_CODE(init) == CALL_EXPR) |
457 | rval = build_aggr_init_array (void_type_node, fn, slot, | |
458 | call_expr_nargs (init), | |
459 | CALL_EXPR_ARGP (init)); | |
460 | else | |
461 | rval = build_aggr_init_array (void_type_node, fn, slot, | |
462 | aggr_init_expr_nargs (init), | |
463 | AGGR_INIT_EXPR_ARGP (init)); | |
4977bab6 ZW |
464 | TREE_SIDE_EFFECTS (rval) = 1; |
465 | AGGR_INIT_VIA_CTOR_P (rval) = is_ctor; | |
d8a0d13e | 466 | TREE_NOTHROW (rval) = TREE_NOTHROW (init); |
4561285b | 467 | CALL_EXPR_LIST_INIT_P (rval) = CALL_EXPR_LIST_INIT_P (init); |
4977bab6 ZW |
468 | } |
469 | else | |
470 | rval = init; | |
471 | ||
844ae01d JM |
472 | return rval; |
473 | } | |
474 | ||
475 | /* INIT is a CALL_EXPR or AGGR_INIT_EXPR which needs info about its | |
476 | target. TYPE is the type that this initialization should appear to | |
477 | have. | |
478 | ||
479 | Build an encapsulation of the initialization to perform | |
480 | and return it so that it can be processed by language-independent | |
481 | and language-specific expression expanders. */ | |
482 | ||
483 | tree | |
362115a9 | 484 | build_cplus_new (tree type, tree init, tsubst_flags_t complain) |
844ae01d | 485 | { |
094484e7 | 486 | tree rval = build_aggr_init_expr (type, init); |
844ae01d JM |
487 | tree slot; |
488 | ||
57fcd4f4 JM |
489 | if (!complete_type_or_maybe_complain (type, init, complain)) |
490 | return error_mark_node; | |
491 | ||
0ed4ab44 JM |
492 | /* Make sure that we're not trying to create an instance of an |
493 | abstract class. */ | |
494 | if (abstract_virtuals_error_sfinae (NULL_TREE, type, complain)) | |
495 | return error_mark_node; | |
496 | ||
844ae01d JM |
497 | if (TREE_CODE (rval) == AGGR_INIT_EXPR) |
498 | slot = AGGR_INIT_EXPR_SLOT (rval); | |
236fd18c JM |
499 | else if (TREE_CODE (rval) == CALL_EXPR |
500 | || TREE_CODE (rval) == CONSTRUCTOR) | |
844ae01d JM |
501 | slot = build_local_temp (type); |
502 | else | |
503 | return rval; | |
504 | ||
574cfaa4 | 505 | rval = build_target_expr (slot, rval, complain); |
a6343f61 PC |
506 | |
507 | if (rval != error_mark_node) | |
508 | TARGET_EXPR_IMPLICIT_P (rval) = 1; | |
8d08fdba | 509 | |
8d08fdba MS |
510 | return rval; |
511 | } | |
512 | ||
262a7d6b JM |
513 | /* Subroutine of build_vec_init_expr: Build up a single element |
514 | intialization as a proxy for the full array initialization to get things | |
515 | marked as used and any appropriate diagnostics. | |
516 | ||
517 | Since we're deferring building the actual constructor calls until | |
518 | gimplification time, we need to build one now and throw it away so | |
519 | that the relevant constructor gets mark_used before cgraph decides | |
520 | what functions are needed. Here we assume that init is either | |
521 | NULL_TREE, void_type_node (indicating value-initialization), or | |
522 | another array to copy. */ | |
523 | ||
524 | static tree | |
9c69dcea | 525 | build_vec_init_elt (tree type, tree init, tsubst_flags_t complain) |
262a7d6b | 526 | { |
b73a4704 | 527 | tree inner_type = strip_array_types (type); |
9771b263 | 528 | vec<tree, va_gc> *argvec; |
262a7d6b | 529 | |
b73a4704 JM |
530 | if (integer_zerop (array_type_nelts_total (type)) |
531 | || !CLASS_TYPE_P (inner_type)) | |
262a7d6b JM |
532 | /* No interesting initialization to do. */ |
533 | return integer_zero_node; | |
534 | else if (init == void_type_node) | |
9c69dcea | 535 | return build_value_init (inner_type, complain); |
262a7d6b | 536 | |
b73a4704 JM |
537 | gcc_assert (init == NULL_TREE |
538 | || (same_type_ignoring_top_level_qualifiers_p | |
539 | (type, TREE_TYPE (init)))); | |
540 | ||
541 | argvec = make_tree_vector (); | |
542 | if (init) | |
262a7d6b | 543 | { |
01290963 JM |
544 | tree init_type = strip_array_types (TREE_TYPE (init)); |
545 | tree dummy = build_dummy_object (init_type); | |
262a7d6b JM |
546 | if (!real_lvalue_p (init)) |
547 | dummy = move (dummy); | |
9771b263 | 548 | argvec->quick_push (dummy); |
262a7d6b | 549 | } |
9c69dcea | 550 | init = build_special_member_call (NULL_TREE, complete_ctor_identifier, |
262a7d6b | 551 | &argvec, inner_type, LOOKUP_NORMAL, |
9c69dcea JM |
552 | complain); |
553 | release_tree_vector (argvec); | |
554 | ||
20888def JM |
555 | /* For a trivial constructor, build_over_call creates a TARGET_EXPR. But |
556 | we don't want one here because we aren't creating a temporary. */ | |
557 | if (TREE_CODE (init) == TARGET_EXPR) | |
558 | init = TARGET_EXPR_INITIAL (init); | |
559 | ||
9c69dcea | 560 | return init; |
262a7d6b JM |
561 | } |
562 | ||
b73a4704 JM |
563 | /* Return a TARGET_EXPR which expresses the initialization of an array to |
564 | be named later, either default-initialization or copy-initialization | |
565 | from another array of the same type. */ | |
d5f4eddd JM |
566 | |
567 | tree | |
9c69dcea | 568 | build_vec_init_expr (tree type, tree init, tsubst_flags_t complain) |
d5f4eddd | 569 | { |
b73a4704 | 570 | tree slot; |
4de2f020 | 571 | bool value_init = false; |
9c69dcea | 572 | tree elt_init = build_vec_init_elt (type, init, complain); |
534ecb17 | 573 | |
262a7d6b | 574 | if (init == void_type_node) |
534ecb17 | 575 | { |
4de2f020 JM |
576 | value_init = true; |
577 | init = NULL_TREE; | |
578 | } | |
534ecb17 | 579 | |
b73a4704 JM |
580 | slot = build_local_temp (type); |
581 | init = build2 (VEC_INIT_EXPR, type, slot, init); | |
0a2cdfe6 | 582 | TREE_SIDE_EFFECTS (init) = true; |
d5f4eddd | 583 | SET_EXPR_LOCATION (init, input_location); |
4de2f020 | 584 | |
604b2bfc | 585 | if (cxx_dialect >= cxx11 |
262a7d6b JM |
586 | && potential_constant_expression (elt_init)) |
587 | VEC_INIT_EXPR_IS_CONSTEXPR (init) = true; | |
4de2f020 JM |
588 | VEC_INIT_EXPR_VALUE_INIT (init) = value_init; |
589 | ||
d5f4eddd JM |
590 | return init; |
591 | } | |
592 | ||
262a7d6b JM |
593 | /* Give a helpful diagnostic for a non-constexpr VEC_INIT_EXPR in a context |
594 | that requires a constant expression. */ | |
595 | ||
596 | void | |
597 | diagnose_non_constexpr_vec_init (tree expr) | |
598 | { | |
599 | tree type = TREE_TYPE (VEC_INIT_EXPR_SLOT (expr)); | |
600 | tree init, elt_init; | |
601 | if (VEC_INIT_EXPR_VALUE_INIT (expr)) | |
7ac37b96 | 602 | init = void_type_node; |
262a7d6b JM |
603 | else |
604 | init = VEC_INIT_EXPR_INIT (expr); | |
605 | ||
9c69dcea | 606 | elt_init = build_vec_init_elt (type, init, tf_warning_or_error); |
262a7d6b JM |
607 | require_potential_constant_expression (elt_init); |
608 | } | |
609 | ||
534ecb17 JM |
610 | tree |
611 | build_array_copy (tree init) | |
612 | { | |
9c69dcea | 613 | return build_vec_init_expr (TREE_TYPE (init), init, tf_warning_or_error); |
534ecb17 JM |
614 | } |
615 | ||
ab93b543 | 616 | /* Build a TARGET_EXPR using INIT to initialize a new temporary of the |
c506ca22 | 617 | indicated TYPE. */ |
aa36c081 JM |
618 | |
619 | tree | |
574cfaa4 | 620 | build_target_expr_with_type (tree init, tree type, tsubst_flags_t complain) |
aa36c081 | 621 | { |
50bc768d | 622 | gcc_assert (!VOID_TYPE_P (type)); |
59445d74 | 623 | |
309714d4 JM |
624 | if (TREE_CODE (init) == TARGET_EXPR |
625 | || init == error_mark_node) | |
5062dbd5 | 626 | return init; |
d758e847 | 627 | else if (CLASS_TYPE_P (type) && type_has_nontrivial_copy_init (type) |
7efc22ea | 628 | && !VOID_TYPE_P (TREE_TYPE (init)) |
4b5aa881 | 629 | && TREE_CODE (init) != COND_EXPR |
662eceda MM |
630 | && TREE_CODE (init) != CONSTRUCTOR |
631 | && TREE_CODE (init) != VA_ARG_EXPR) | |
7efc22ea JM |
632 | /* We need to build up a copy constructor call. A void initializer |
633 | means we're being called from bot_manip. COND_EXPR is a special | |
182609b5 | 634 | case because we already have copies on the arms and we don't want |
4b5aa881 | 635 | another one here. A CONSTRUCTOR is aggregate initialization, which |
662eceda MM |
636 | is handled separately. A VA_ARG_EXPR is magic creation of an |
637 | aggregate; there's no additional work to be done. */ | |
574cfaa4 | 638 | return force_rvalue (init, complain); |
5062dbd5 | 639 | |
574cfaa4 | 640 | return force_target_expr (type, init, complain); |
a6f86b51 | 641 | } |
aa36c081 | 642 | |
a6f86b51 JM |
643 | /* Like the above function, but without the checking. This function should |
644 | only be used by code which is deliberately trying to subvert the type | |
d758e847 JM |
645 | system, such as call_builtin_trap. Or build_over_call, to avoid |
646 | infinite recursion. */ | |
a6f86b51 JM |
647 | |
648 | tree | |
574cfaa4 | 649 | force_target_expr (tree type, tree init, tsubst_flags_t complain) |
a6f86b51 | 650 | { |
59445d74 RH |
651 | tree slot; |
652 | ||
50bc768d | 653 | gcc_assert (!VOID_TYPE_P (type)); |
59445d74 RH |
654 | |
655 | slot = build_local_temp (type); | |
574cfaa4 | 656 | return build_target_expr (slot, init, complain); |
aa36c081 JM |
657 | } |
658 | ||
c506ca22 MM |
659 | /* Like build_target_expr_with_type, but use the type of INIT. */ |
660 | ||
661 | tree | |
574cfaa4 | 662 | get_target_expr_sfinae (tree init, tsubst_flags_t complain) |
c506ca22 | 663 | { |
450a927a | 664 | if (TREE_CODE (init) == AGGR_INIT_EXPR) |
574cfaa4 | 665 | return build_target_expr (AGGR_INIT_EXPR_SLOT (init), init, complain); |
991e0156 | 666 | else if (TREE_CODE (init) == VEC_INIT_EXPR) |
574cfaa4 | 667 | return build_target_expr (VEC_INIT_EXPR_SLOT (init), init, complain); |
450a927a | 668 | else |
574cfaa4 JM |
669 | return build_target_expr_with_type (init, TREE_TYPE (init), complain); |
670 | } | |
671 | ||
672 | tree | |
673 | get_target_expr (tree init) | |
674 | { | |
675 | return get_target_expr_sfinae (init, tf_warning_or_error); | |
c506ca22 MM |
676 | } |
677 | ||
e1039697 MM |
678 | /* If EXPR is a bitfield reference, convert it to the declared type of |
679 | the bitfield, and return the resulting expression. Otherwise, | |
680 | return EXPR itself. */ | |
681 | ||
682 | tree | |
683 | convert_bitfield_to_declared_type (tree expr) | |
684 | { | |
685 | tree bitfield_type; | |
686 | ||
687 | bitfield_type = is_bitfield_expr_with_lowered_type (expr); | |
688 | if (bitfield_type) | |
41990f96 MM |
689 | expr = convert_to_integer (TYPE_MAIN_VARIANT (bitfield_type), |
690 | expr); | |
e1039697 MM |
691 | return expr; |
692 | } | |
693 | ||
5cc53d4e MM |
694 | /* EXPR is being used in an rvalue context. Return a version of EXPR |
695 | that is marked as an rvalue. */ | |
696 | ||
697 | tree | |
698 | rvalue (tree expr) | |
699 | { | |
41990f96 MM |
700 | tree type; |
701 | ||
702 | if (error_operand_p (expr)) | |
703 | return expr; | |
704 | ||
03a904b5 JJ |
705 | expr = mark_rvalue_use (expr); |
706 | ||
41990f96 MM |
707 | /* [basic.lval] |
708 | ||
709 | Non-class rvalues always have cv-unqualified types. */ | |
710 | type = TREE_TYPE (expr); | |
36c37128 JM |
711 | if (!CLASS_TYPE_P (type) && cv_qualified_p (type)) |
712 | type = cv_unqualified (type); | |
41990f96 | 713 | |
b9c6b842 JM |
714 | /* We need to do this for rvalue refs as well to get the right answer |
715 | from decltype; see c++/36628. */ | |
716 | if (!processing_template_decl && lvalue_or_rvalue_with_address_p (expr)) | |
41990f96 MM |
717 | expr = build1 (NON_LVALUE_EXPR, type, expr); |
718 | else if (type != TREE_TYPE (expr)) | |
719 | expr = build_nop (type, expr); | |
720 | ||
5cc53d4e MM |
721 | return expr; |
722 | } | |
723 | ||
8d08fdba | 724 | \f |
06d40de8 DG |
725 | /* Hash an ARRAY_TYPE. K is really of type `tree'. */ |
726 | ||
727 | static hashval_t | |
728 | cplus_array_hash (const void* k) | |
729 | { | |
730 | hashval_t hash; | |
741ac903 | 731 | const_tree const t = (const_tree) k; |
06d40de8 | 732 | |
eb9c434c JJ |
733 | hash = TYPE_UID (TREE_TYPE (t)); |
734 | if (TYPE_DOMAIN (t)) | |
735 | hash ^= TYPE_UID (TYPE_DOMAIN (t)); | |
06d40de8 DG |
736 | return hash; |
737 | } | |
738 | ||
739 | typedef struct cplus_array_info { | |
740 | tree type; | |
741 | tree domain; | |
742 | } cplus_array_info; | |
743 | ||
744 | /* Compare two ARRAY_TYPEs. K1 is really of type `tree', K2 is really | |
745 | of type `cplus_array_info*'. */ | |
746 | ||
747 | static int | |
748 | cplus_array_compare (const void * k1, const void * k2) | |
749 | { | |
741ac903 KG |
750 | const_tree const t1 = (const_tree) k1; |
751 | const cplus_array_info *const t2 = (const cplus_array_info*) k2; | |
06d40de8 | 752 | |
714f2304 | 753 | return (TREE_TYPE (t1) == t2->type && TYPE_DOMAIN (t1) == t2->domain); |
06d40de8 DG |
754 | } |
755 | ||
38e40fcd JM |
756 | /* Hash table containing dependent array types, which are unsuitable for |
757 | the language-independent type hash table. */ | |
06d40de8 DG |
758 | static GTY ((param_is (union tree_node))) htab_t cplus_array_htab; |
759 | ||
38e40fcd | 760 | /* Like build_array_type, but handle special C++ semantics. */ |
06d40de8 | 761 | |
38e40fcd JM |
762 | tree |
763 | build_cplus_array_type (tree elt_type, tree index_type) | |
8d08fdba | 764 | { |
8d08fdba MS |
765 | tree t; |
766 | ||
adecb3f4 MM |
767 | if (elt_type == error_mark_node || index_type == error_mark_node) |
768 | return error_mark_node; | |
769 | ||
6da06848 JJ |
770 | if (processing_template_decl |
771 | && (dependent_type_p (elt_type) | |
772 | || (index_type && !TREE_CONSTANT (TYPE_MAX_VALUE (index_type))))) | |
5566b478 | 773 | { |
06d40de8 DG |
774 | void **e; |
775 | cplus_array_info cai; | |
776 | hashval_t hash; | |
714f2304 | 777 | |
06d40de8 DG |
778 | if (cplus_array_htab == NULL) |
779 | cplus_array_htab = htab_create_ggc (61, &cplus_array_hash, | |
780 | &cplus_array_compare, NULL); | |
781 | ||
eb9c434c JJ |
782 | hash = TYPE_UID (elt_type); |
783 | if (index_type) | |
784 | hash ^= TYPE_UID (index_type); | |
06d40de8 DG |
785 | cai.type = elt_type; |
786 | cai.domain = index_type; | |
787 | ||
788 | e = htab_find_slot_with_hash (cplus_array_htab, &cai, hash, INSERT); | |
789 | if (*e) | |
714f2304 | 790 | /* We have found the type: we're done. */ |
06d40de8 DG |
791 | return (tree) *e; |
792 | else | |
793 | { | |
714f2304 | 794 | /* Build a new array type. */ |
7ecbca9d | 795 | t = cxx_make_type (ARRAY_TYPE); |
06d40de8 DG |
796 | TREE_TYPE (t) = elt_type; |
797 | TYPE_DOMAIN (t) = index_type; | |
798 | ||
714f2304 DG |
799 | /* Store it in the hash table. */ |
800 | *e = t; | |
801 | ||
802 | /* Set the canonical type for this new node. */ | |
06d40de8 DG |
803 | if (TYPE_STRUCTURAL_EQUALITY_P (elt_type) |
804 | || (index_type && TYPE_STRUCTURAL_EQUALITY_P (index_type))) | |
805 | SET_TYPE_STRUCTURAL_EQUALITY (t); | |
806 | else if (TYPE_CANONICAL (elt_type) != elt_type | |
807 | || (index_type | |
808 | && TYPE_CANONICAL (index_type) != index_type)) | |
714f2304 DG |
809 | TYPE_CANONICAL (t) |
810 | = build_cplus_array_type | |
811 | (TYPE_CANONICAL (elt_type), | |
6da06848 | 812 | index_type ? TYPE_CANONICAL (index_type) : index_type); |
714f2304 DG |
813 | else |
814 | TYPE_CANONICAL (t) = t; | |
06d40de8 | 815 | } |
5566b478 MS |
816 | } |
817 | else | |
3ebc22c1 JM |
818 | { |
819 | if (!TYPE_STRUCTURAL_EQUALITY_P (elt_type) | |
820 | && !(index_type && TYPE_STRUCTURAL_EQUALITY_P (index_type)) | |
821 | && (TYPE_CANONICAL (elt_type) != elt_type | |
822 | || (index_type && TYPE_CANONICAL (index_type) != index_type))) | |
823 | /* Make sure that the canonical type is on the appropriate | |
824 | variants list. */ | |
825 | build_cplus_array_type | |
826 | (TYPE_CANONICAL (elt_type), | |
827 | index_type ? TYPE_CANONICAL (index_type) : index_type); | |
828 | t = build_array_type (elt_type, index_type); | |
829 | } | |
8d08fdba | 830 | |
e78167f2 JM |
831 | /* Push these needs up so that initialization takes place |
832 | more easily. */ | |
833 | bool needs_ctor | |
834 | = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type)); | |
835 | TYPE_NEEDS_CONSTRUCTING (t) = needs_ctor; | |
836 | bool needs_dtor | |
837 | = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type)); | |
838 | TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t) = needs_dtor; | |
839 | ||
38e40fcd JM |
840 | /* We want TYPE_MAIN_VARIANT of an array to strip cv-quals from the |
841 | element type as well, so fix it up if needed. */ | |
842 | if (elt_type != TYPE_MAIN_VARIANT (elt_type)) | |
843 | { | |
844 | tree m = build_cplus_array_type (TYPE_MAIN_VARIANT (elt_type), | |
845 | index_type); | |
697c474c | 846 | |
38e40fcd JM |
847 | if (TYPE_MAIN_VARIANT (t) != m) |
848 | { | |
9f0bdc93 | 849 | if (COMPLETE_TYPE_P (TREE_TYPE (t)) && !COMPLETE_TYPE_P (m)) |
e78167f2 JM |
850 | { |
851 | /* m was built before the element type was complete, so we | |
9f0bdc93 JM |
852 | also need to copy the layout info from t. We might |
853 | end up doing this multiple times if t is an array of | |
854 | unknown bound. */ | |
e78167f2 JM |
855 | tree size = TYPE_SIZE (t); |
856 | tree size_unit = TYPE_SIZE_UNIT (t); | |
857 | unsigned int align = TYPE_ALIGN (t); | |
858 | unsigned int user_align = TYPE_USER_ALIGN (t); | |
859 | enum machine_mode mode = TYPE_MODE (t); | |
860 | for (tree var = m; var; var = TYPE_NEXT_VARIANT (var)) | |
861 | { | |
862 | TYPE_SIZE (var) = size; | |
863 | TYPE_SIZE_UNIT (var) = size_unit; | |
864 | TYPE_ALIGN (var) = align; | |
865 | TYPE_USER_ALIGN (var) = user_align; | |
866 | SET_TYPE_MODE (var, mode); | |
867 | TYPE_NEEDS_CONSTRUCTING (var) = needs_ctor; | |
868 | TYPE_HAS_NONTRIVIAL_DESTRUCTOR (var) = needs_dtor; | |
869 | } | |
870 | } | |
871 | ||
38e40fcd JM |
872 | TYPE_MAIN_VARIANT (t) = m; |
873 | TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (m); | |
874 | TYPE_NEXT_VARIANT (m) = t; | |
875 | } | |
876 | } | |
877 | ||
03d31730 PC |
878 | /* Avoid spurious warnings with VLAs (c++/54583). */ |
879 | if (TYPE_SIZE (t) && EXPR_P (TYPE_SIZE (t))) | |
880 | TREE_NO_WARNING (TYPE_SIZE (t)) = 1; | |
881 | ||
8d08fdba MS |
882 | return t; |
883 | } | |
e349ee73 | 884 | |
09357846 JM |
885 | /* Return an ARRAY_TYPE with element type ELT and length N. */ |
886 | ||
887 | tree | |
888 | build_array_of_n_type (tree elt, int n) | |
889 | { | |
890 | return build_cplus_array_type (elt, build_index_type (size_int (n - 1))); | |
891 | } | |
892 | ||
0138d6b2 JM |
893 | /* True iff T is a C++1y array of runtime bound (VLA). */ |
894 | ||
895 | bool | |
896 | array_of_runtime_bound_p (tree t) | |
897 | { | |
898 | if (!t || TREE_CODE (t) != ARRAY_TYPE) | |
899 | return false; | |
900 | tree dom = TYPE_DOMAIN (t); | |
901 | if (!dom) | |
902 | return false; | |
903 | tree max = TYPE_MAX_VALUE (dom); | |
593bcbb8 JM |
904 | return (!potential_rvalue_constant_expression (max) |
905 | || (!value_dependent_expression_p (max) && !TREE_CONSTANT (max))); | |
0138d6b2 JM |
906 | } |
907 | ||
8af2fec4 RY |
908 | /* Return a reference type node referring to TO_TYPE. If RVAL is |
909 | true, return an rvalue reference type, otherwise return an lvalue | |
910 | reference type. If a type node exists, reuse it, otherwise create | |
911 | a new one. */ | |
912 | tree | |
913 | cp_build_reference_type (tree to_type, bool rval) | |
914 | { | |
915 | tree lvalue_ref, t; | |
916 | lvalue_ref = build_reference_type (to_type); | |
917 | if (!rval) | |
918 | return lvalue_ref; | |
919 | ||
920 | /* This code to create rvalue reference types is based on and tied | |
921 | to the code creating lvalue reference types in the middle-end | |
922 | functions build_reference_type_for_mode and build_reference_type. | |
923 | ||
924 | It works by putting the rvalue reference type nodes after the | |
925 | lvalue reference nodes in the TYPE_NEXT_REF_TO linked list, so | |
926 | they will effectively be ignored by the middle end. */ | |
927 | ||
928 | for (t = lvalue_ref; (t = TYPE_NEXT_REF_TO (t)); ) | |
929 | if (TYPE_REF_IS_RVALUE (t)) | |
930 | return t; | |
931 | ||
22521c89 | 932 | t = build_distinct_type_copy (lvalue_ref); |
8af2fec4 RY |
933 | |
934 | TYPE_REF_IS_RVALUE (t) = true; | |
935 | TYPE_NEXT_REF_TO (t) = TYPE_NEXT_REF_TO (lvalue_ref); | |
936 | TYPE_NEXT_REF_TO (lvalue_ref) = t; | |
8af2fec4 RY |
937 | |
938 | if (TYPE_STRUCTURAL_EQUALITY_P (to_type)) | |
939 | SET_TYPE_STRUCTURAL_EQUALITY (t); | |
940 | else if (TYPE_CANONICAL (to_type) != to_type) | |
941 | TYPE_CANONICAL (t) | |
942 | = cp_build_reference_type (TYPE_CANONICAL (to_type), rval); | |
943 | else | |
944 | TYPE_CANONICAL (t) = t; | |
945 | ||
946 | layout_type (t); | |
947 | ||
948 | return t; | |
949 | ||
950 | } | |
951 | ||
d5f4eddd JM |
952 | /* Returns EXPR cast to rvalue reference type, like std::move. */ |
953 | ||
954 | tree | |
955 | move (tree expr) | |
956 | { | |
957 | tree type = TREE_TYPE (expr); | |
958 | gcc_assert (TREE_CODE (type) != REFERENCE_TYPE); | |
959 | type = cp_build_reference_type (type, /*rval*/true); | |
960 | return build_static_cast (type, expr, tf_warning_or_error); | |
961 | } | |
962 | ||
9ae165a0 DG |
963 | /* Used by the C++ front end to build qualified array types. However, |
964 | the C version of this function does not properly maintain canonical | |
965 | types (which are not used in C). */ | |
966 | tree | |
967 | c_build_qualified_type (tree type, int type_quals) | |
968 | { | |
969 | return cp_build_qualified_type (type, type_quals); | |
970 | } | |
8af2fec4 | 971 | |
8d08fdba | 972 | \f |
adecb3f4 MM |
973 | /* Make a variant of TYPE, qualified with the TYPE_QUALS. Handles |
974 | arrays correctly. In particular, if TYPE is an array of T's, and | |
c2ea3a40 | 975 | TYPE_QUALS is non-empty, returns an array of qualified T's. |
9f63daea | 976 | |
39a13be5 | 977 | FLAGS determines how to deal with ill-formed qualifications. If |
4f2b0fb2 NS |
978 | tf_ignore_bad_quals is set, then bad qualifications are dropped |
979 | (this is permitted if TYPE was introduced via a typedef or template | |
980 | type parameter). If bad qualifications are dropped and tf_warning | |
981 | is set, then a warning is issued for non-const qualifications. If | |
982 | tf_ignore_bad_quals is not set and tf_error is not set, we | |
983 | return error_mark_node. Otherwise, we issue an error, and ignore | |
984 | the qualifications. | |
985 | ||
986 | Qualification of a reference type is valid when the reference came | |
987 | via a typedef or template type argument. [dcl.ref] No such | |
988 | dispensation is provided for qualifying a function type. [dcl.fct] | |
989 | DR 295 queries this and the proposed resolution brings it into line | |
34cd5ae7 | 990 | with qualifying a reference. We implement the DR. We also behave |
4f2b0fb2 | 991 | in a similar manner for restricting non-pointer types. */ |
9f63daea | 992 | |
f376e137 | 993 | tree |
9f63daea | 994 | cp_build_qualified_type_real (tree type, |
0cbd7506 MS |
995 | int type_quals, |
996 | tsubst_flags_t complain) | |
f376e137 | 997 | { |
2adeacc9 | 998 | tree result; |
4f2b0fb2 | 999 | int bad_quals = TYPE_UNQUALIFIED; |
2adeacc9 | 1000 | |
e76a2646 MS |
1001 | if (type == error_mark_node) |
1002 | return type; | |
e271912d | 1003 | |
89d684bb | 1004 | if (type_quals == cp_type_quals (type)) |
e271912d JM |
1005 | return type; |
1006 | ||
4f2b0fb2 | 1007 | if (TREE_CODE (type) == ARRAY_TYPE) |
f376e137 | 1008 | { |
db3626d1 MM |
1009 | /* In C++, the qualification really applies to the array element |
1010 | type. Obtain the appropriately qualified element type. */ | |
1011 | tree t; | |
9f63daea EC |
1012 | tree element_type |
1013 | = cp_build_qualified_type_real (TREE_TYPE (type), | |
db3626d1 MM |
1014 | type_quals, |
1015 | complain); | |
1016 | ||
1017 | if (element_type == error_mark_node) | |
adecb3f4 | 1018 | return error_mark_node; |
f376e137 | 1019 | |
38e40fcd JM |
1020 | /* See if we already have an identically qualified type. Tests |
1021 | should be equivalent to those in check_qualified_type. */ | |
29fae15c | 1022 | for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) |
ef765996 | 1023 | if (TREE_TYPE (t) == element_type |
29fae15c | 1024 | && TYPE_NAME (t) == TYPE_NAME (type) |
38e40fcd JM |
1025 | && TYPE_CONTEXT (t) == TYPE_CONTEXT (type) |
1026 | && attribute_list_equal (TYPE_ATTRIBUTES (t), | |
1027 | TYPE_ATTRIBUTES (type))) | |
29fae15c | 1028 | break; |
9f63daea | 1029 | |
29fae15c | 1030 | if (!t) |
38e40fcd JM |
1031 | { |
1032 | t = build_cplus_array_type (element_type, TYPE_DOMAIN (type)); | |
1033 | ||
1034 | /* Keep the typedef name. */ | |
1035 | if (TYPE_NAME (t) != TYPE_NAME (type)) | |
1036 | { | |
1037 | t = build_variant_type_copy (t); | |
1038 | TYPE_NAME (t) = TYPE_NAME (type); | |
1039 | } | |
1040 | } | |
f376e137 | 1041 | |
db3626d1 | 1042 | /* Even if we already had this variant, we update |
834c6dff | 1043 | TYPE_NEEDS_CONSTRUCTING and TYPE_HAS_NONTRIVIAL_DESTRUCTOR in case |
9f63daea EC |
1044 | they changed since the variant was originally created. |
1045 | ||
db3626d1 MM |
1046 | This seems hokey; if there is some way to use a previous |
1047 | variant *without* coming through here, | |
1048 | TYPE_NEEDS_CONSTRUCTING will never be updated. */ | |
9f63daea | 1049 | TYPE_NEEDS_CONSTRUCTING (t) |
db3626d1 | 1050 | = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (element_type)); |
9f63daea | 1051 | TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t) |
834c6dff | 1052 | = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (element_type)); |
db3626d1 | 1053 | return t; |
f376e137 | 1054 | } |
2adeacc9 MM |
1055 | else if (TYPE_PTRMEMFUNC_P (type)) |
1056 | { | |
1057 | /* For a pointer-to-member type, we can't just return a | |
1058 | cv-qualified version of the RECORD_TYPE. If we do, we | |
4f2b0fb2 | 1059 | haven't changed the field that contains the actual pointer to |
2adeacc9 MM |
1060 | a method, and so TYPE_PTRMEMFUNC_FN_TYPE will be wrong. */ |
1061 | tree t; | |
1062 | ||
1063 | t = TYPE_PTRMEMFUNC_FN_TYPE (type); | |
1064 | t = cp_build_qualified_type_real (t, type_quals, complain); | |
46cbda4a | 1065 | return build_ptrmemfunc_type (t); |
2adeacc9 | 1066 | } |
9a3c2683 JJ |
1067 | else if (TREE_CODE (type) == TYPE_PACK_EXPANSION) |
1068 | { | |
1069 | tree t = PACK_EXPANSION_PATTERN (type); | |
1070 | ||
1071 | t = cp_build_qualified_type_real (t, type_quals, complain); | |
1072 | return make_pack_expansion (t); | |
1073 | } | |
9f63daea | 1074 | |
39a13be5 | 1075 | /* A reference or method type shall not be cv-qualified. |
93e1ddcf JM |
1076 | [dcl.ref], [dcl.fct]. This used to be an error, but as of DR 295 |
1077 | (in CD1) we always ignore extra cv-quals on functions. */ | |
4b011bbf JM |
1078 | if (type_quals & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE) |
1079 | && (TREE_CODE (type) == REFERENCE_TYPE | |
2872152c | 1080 | || TREE_CODE (type) == FUNCTION_TYPE |
4b011bbf JM |
1081 | || TREE_CODE (type) == METHOD_TYPE)) |
1082 | { | |
93e1ddcf JM |
1083 | if (TREE_CODE (type) == REFERENCE_TYPE) |
1084 | bad_quals |= type_quals & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE); | |
4b011bbf JM |
1085 | type_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE); |
1086 | } | |
9f63daea | 1087 | |
2872152c JM |
1088 | /* But preserve any function-cv-quals on a FUNCTION_TYPE. */ |
1089 | if (TREE_CODE (type) == FUNCTION_TYPE) | |
1090 | type_quals |= type_memfn_quals (type); | |
1091 | ||
4b011bbf | 1092 | /* A restrict-qualified type must be a pointer (or reference) |
0d9c0892 | 1093 | to object or incomplete type. */ |
4b011bbf JM |
1094 | if ((type_quals & TYPE_QUAL_RESTRICT) |
1095 | && TREE_CODE (type) != TEMPLATE_TYPE_PARM | |
1096 | && TREE_CODE (type) != TYPENAME_TYPE | |
1097 | && !POINTER_TYPE_P (type)) | |
1098 | { | |
1099 | bad_quals |= TYPE_QUAL_RESTRICT; | |
1100 | type_quals &= ~TYPE_QUAL_RESTRICT; | |
1101 | } | |
1102 | ||
93e1ddcf JM |
1103 | if (bad_quals == TYPE_UNQUALIFIED |
1104 | || (complain & tf_ignore_bad_quals)) | |
4b011bbf | 1105 | /*OK*/; |
93e1ddcf | 1106 | else if (!(complain & tf_error)) |
4b011bbf | 1107 | return error_mark_node; |
4b011bbf JM |
1108 | else |
1109 | { | |
93e1ddcf JM |
1110 | tree bad_type = build_qualified_type (ptr_type_node, bad_quals); |
1111 | error ("%qV qualifiers cannot be applied to %qT", | |
1112 | bad_type, type); | |
4b011bbf | 1113 | } |
9f63daea | 1114 | |
2adeacc9 MM |
1115 | /* Retrieve (or create) the appropriately qualified variant. */ |
1116 | result = build_qualified_type (type, type_quals); | |
1117 | ||
2eed8e37 BK |
1118 | /* Preserve exception specs and ref-qualifier since build_qualified_type |
1119 | doesn't know about them. */ | |
1120 | if (TREE_CODE (result) == FUNCTION_TYPE | |
1121 | || TREE_CODE (result) == METHOD_TYPE) | |
1122 | { | |
1123 | result = build_exception_variant (result, TYPE_RAISES_EXCEPTIONS (type)); | |
1124 | result = build_ref_qualified_type (result, type_memfn_rqual (type)); | |
1125 | } | |
1126 | ||
2adeacc9 | 1127 | /* If this was a pointer-to-method type, and we just made a copy, |
3cfab7ec GK |
1128 | then we need to unshare the record that holds the cached |
1129 | pointer-to-member-function type, because these will be distinct | |
1130 | between the unqualified and qualified types. */ | |
9f63daea | 1131 | if (result != type |
50e10fa8 | 1132 | && TYPE_PTR_P (type) |
0f67bdf1 JM |
1133 | && TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE |
1134 | && TYPE_LANG_SPECIFIC (result) == TYPE_LANG_SPECIFIC (type)) | |
3cfab7ec | 1135 | TYPE_LANG_SPECIFIC (result) = NULL; |
2adeacc9 | 1136 | |
7aa4a1df DG |
1137 | /* We may also have ended up building a new copy of the canonical |
1138 | type of a pointer-to-method type, which could have the same | |
1139 | sharing problem described above. */ | |
1140 | if (TYPE_CANONICAL (result) != TYPE_CANONICAL (type) | |
50e10fa8 | 1141 | && TYPE_PTR_P (type) |
7aa4a1df DG |
1142 | && TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE |
1143 | && (TYPE_LANG_SPECIFIC (TYPE_CANONICAL (result)) | |
1144 | == TYPE_LANG_SPECIFIC (TYPE_CANONICAL (type)))) | |
1145 | TYPE_LANG_SPECIFIC (TYPE_CANONICAL (result)) = NULL; | |
7aa4a1df | 1146 | |
2adeacc9 | 1147 | return result; |
f376e137 | 1148 | } |
53929c47 | 1149 | |
164247b0 JM |
1150 | /* Return TYPE with const and volatile removed. */ |
1151 | ||
1152 | tree | |
1153 | cv_unqualified (tree type) | |
1154 | { | |
ea8b8aa0 JM |
1155 | int quals; |
1156 | ||
1157 | if (type == error_mark_node) | |
1158 | return type; | |
1159 | ||
a3360e77 | 1160 | quals = cp_type_quals (type); |
164247b0 JM |
1161 | quals &= ~(TYPE_QUAL_CONST|TYPE_QUAL_VOLATILE); |
1162 | return cp_build_qualified_type (type, quals); | |
1163 | } | |
1164 | ||
cd41d410 DS |
1165 | /* Builds a qualified variant of T that is not a typedef variant. |
1166 | E.g. consider the following declarations: | |
1167 | typedef const int ConstInt; | |
1168 | typedef ConstInt* PtrConstInt; | |
1169 | If T is PtrConstInt, this function returns a type representing | |
1170 | const int*. | |
1171 | In other words, if T is a typedef, the function returns the underlying type. | |
1172 | The cv-qualification and attributes of the type returned match the | |
1173 | input type. | |
1174 | They will always be compatible types. | |
1175 | The returned type is built so that all of its subtypes | |
1176 | recursively have their typedefs stripped as well. | |
1177 | ||
1178 | This is different from just returning TYPE_CANONICAL (T) | |
1179 | Because of several reasons: | |
1180 | * If T is a type that needs structural equality | |
1181 | its TYPE_CANONICAL (T) will be NULL. | |
1182 | * TYPE_CANONICAL (T) desn't carry type attributes | |
49bb4bbe | 1183 | and loses template parameter names. */ |
53929c47 JM |
1184 | |
1185 | tree | |
cd41d410 | 1186 | strip_typedefs (tree t) |
53929c47 | 1187 | { |
cd41d410 DS |
1188 | tree result = NULL, type = NULL, t0 = NULL; |
1189 | ||
1190 | if (!t || t == error_mark_node || t == TYPE_CANONICAL (t)) | |
1191 | return t; | |
1192 | ||
1193 | gcc_assert (TYPE_P (t)); | |
1194 | ||
1195 | switch (TREE_CODE (t)) | |
1196 | { | |
1197 | case POINTER_TYPE: | |
1198 | type = strip_typedefs (TREE_TYPE (t)); | |
1199 | result = build_pointer_type (type); | |
1200 | break; | |
1201 | case REFERENCE_TYPE: | |
1202 | type = strip_typedefs (TREE_TYPE (t)); | |
1203 | result = cp_build_reference_type (type, TYPE_REF_IS_RVALUE (t)); | |
1204 | break; | |
1205 | case OFFSET_TYPE: | |
1206 | t0 = strip_typedefs (TYPE_OFFSET_BASETYPE (t)); | |
1207 | type = strip_typedefs (TREE_TYPE (t)); | |
1208 | result = build_offset_type (t0, type); | |
1209 | break; | |
1210 | case RECORD_TYPE: | |
1211 | if (TYPE_PTRMEMFUNC_P (t)) | |
1212 | { | |
1213 | t0 = strip_typedefs (TYPE_PTRMEMFUNC_FN_TYPE (t)); | |
1214 | result = build_ptrmemfunc_type (t0); | |
1215 | } | |
1216 | break; | |
1217 | case ARRAY_TYPE: | |
1218 | type = strip_typedefs (TREE_TYPE (t)); | |
1219 | t0 = strip_typedefs (TYPE_DOMAIN (t));; | |
1220 | result = build_cplus_array_type (type, t0); | |
1221 | break; | |
1222 | case FUNCTION_TYPE: | |
1223 | case METHOD_TYPE: | |
1224 | { | |
1225 | tree arg_types = NULL, arg_node, arg_type; | |
1226 | for (arg_node = TYPE_ARG_TYPES (t); | |
1227 | arg_node; | |
1228 | arg_node = TREE_CHAIN (arg_node)) | |
1229 | { | |
1230 | if (arg_node == void_list_node) | |
1231 | break; | |
1232 | arg_type = strip_typedefs (TREE_VALUE (arg_node)); | |
1233 | gcc_assert (arg_type); | |
1234 | ||
1235 | arg_types = | |
1236 | tree_cons (TREE_PURPOSE (arg_node), arg_type, arg_types); | |
1237 | } | |
1238 | ||
1239 | if (arg_types) | |
1240 | arg_types = nreverse (arg_types); | |
1241 | ||
1242 | /* A list of parameters not ending with an ellipsis | |
1243 | must end with void_list_node. */ | |
1244 | if (arg_node) | |
1245 | arg_types = chainon (arg_types, void_list_node); | |
1246 | ||
1247 | type = strip_typedefs (TREE_TYPE (t)); | |
1248 | if (TREE_CODE (t) == METHOD_TYPE) | |
1249 | { | |
1250 | tree class_type = TREE_TYPE (TREE_VALUE (arg_types)); | |
1251 | gcc_assert (class_type); | |
1252 | result = | |
1253 | build_method_type_directly (class_type, type, | |
1254 | TREE_CHAIN (arg_types)); | |
f585f69b JM |
1255 | result |
1256 | = build_ref_qualified_type (result, type_memfn_rqual (t)); | |
cd41d410 DS |
1257 | } |
1258 | else | |
2872152c | 1259 | { |
cd41d410 DS |
1260 | result = build_function_type (type, |
1261 | arg_types); | |
2eed8e37 BK |
1262 | result = apply_memfn_quals (result, |
1263 | type_memfn_quals (t), | |
1264 | type_memfn_rqual (t)); | |
2872152c | 1265 | } |
3c3905fc JM |
1266 | |
1267 | if (TYPE_RAISES_EXCEPTIONS (t)) | |
1268 | result = build_exception_variant (result, | |
1269 | TYPE_RAISES_EXCEPTIONS (t)); | |
cab421f4 PC |
1270 | if (TYPE_HAS_LATE_RETURN_TYPE (t)) |
1271 | TYPE_HAS_LATE_RETURN_TYPE (result) = 1; | |
cd41d410 DS |
1272 | } |
1273 | break; | |
e6c2fc5d | 1274 | case TYPENAME_TYPE: |
5b5d851e JM |
1275 | { |
1276 | tree fullname = TYPENAME_TYPE_FULLNAME (t); | |
9ebced77 JJ |
1277 | if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR |
1278 | && TREE_OPERAND (fullname, 1)) | |
5b5d851e JM |
1279 | { |
1280 | tree args = TREE_OPERAND (fullname, 1); | |
1281 | tree new_args = copy_node (args); | |
1282 | bool changed = false; | |
1283 | for (int i = 0; i < TREE_VEC_LENGTH (args); ++i) | |
1284 | { | |
1285 | tree arg = TREE_VEC_ELT (args, i); | |
1286 | tree strip_arg; | |
1287 | if (TYPE_P (arg)) | |
1288 | strip_arg = strip_typedefs (arg); | |
1289 | else | |
1290 | strip_arg = strip_typedefs_expr (arg); | |
1291 | TREE_VEC_ELT (new_args, i) = strip_arg; | |
1292 | if (strip_arg != arg) | |
1293 | changed = true; | |
1294 | } | |
1295 | if (changed) | |
7349ed05 JJ |
1296 | { |
1297 | NON_DEFAULT_TEMPLATE_ARGS_COUNT (new_args) | |
1298 | = NON_DEFAULT_TEMPLATE_ARGS_COUNT (args); | |
1299 | fullname | |
1300 | = lookup_template_function (TREE_OPERAND (fullname, 0), | |
1301 | new_args); | |
1302 | } | |
5b5d851e JM |
1303 | else |
1304 | ggc_free (new_args); | |
1305 | } | |
1306 | result = make_typename_type (strip_typedefs (TYPE_CONTEXT (t)), | |
1307 | fullname, typename_type, tf_none); | |
1308 | } | |
e6c2fc5d | 1309 | break; |
49bb4bbe JM |
1310 | case DECLTYPE_TYPE: |
1311 | result = strip_typedefs_expr (DECLTYPE_TYPE_EXPR (t)); | |
1312 | if (result == DECLTYPE_TYPE_EXPR (t)) | |
1313 | return t; | |
1314 | else | |
1315 | result = (finish_decltype_type | |
1316 | (result, | |
1317 | DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P (t), | |
1318 | tf_none)); | |
1319 | break; | |
cd41d410 DS |
1320 | default: |
1321 | break; | |
1322 | } | |
1ad8aeeb | 1323 | |
cd41d410 DS |
1324 | if (!result) |
1325 | result = TYPE_MAIN_VARIANT (t); | |
05322543 JM |
1326 | if (TYPE_USER_ALIGN (t) != TYPE_USER_ALIGN (result) |
1327 | || TYPE_ALIGN (t) != TYPE_ALIGN (result)) | |
1328 | { | |
1329 | gcc_assert (TYPE_USER_ALIGN (t)); | |
1330 | if (TYPE_ALIGN (t) == TYPE_ALIGN (result)) | |
1331 | result = build_variant_type_copy (result); | |
1332 | else | |
1333 | result = build_aligned_type (result, TYPE_ALIGN (t)); | |
1334 | TYPE_USER_ALIGN (result) = true; | |
1335 | } | |
3c3905fc JM |
1336 | if (TYPE_ATTRIBUTES (t)) |
1337 | result = cp_build_type_attribute_variant (result, TYPE_ATTRIBUTES (t)); | |
cd41d410 | 1338 | return cp_build_qualified_type (result, cp_type_quals (t)); |
53929c47 | 1339 | } |
cd41d410 | 1340 | |
49bb4bbe JM |
1341 | /* Like strip_typedefs above, but works on expressions, so that in |
1342 | ||
1343 | template<class T> struct A | |
1344 | { | |
1345 | typedef T TT; | |
1346 | B<sizeof(TT)> b; | |
1347 | }; | |
1348 | ||
1349 | sizeof(TT) is replaced by sizeof(T). */ | |
1350 | ||
1351 | tree | |
1352 | strip_typedefs_expr (tree t) | |
1353 | { | |
1354 | unsigned i,n; | |
1355 | tree r, type, *ops; | |
1356 | enum tree_code code; | |
1357 | ||
1358 | if (t == NULL_TREE || t == error_mark_node) | |
1359 | return t; | |
1360 | ||
1361 | if (DECL_P (t) || CONSTANT_CLASS_P (t)) | |
1362 | return t; | |
1363 | ||
1364 | /* Some expressions have type operands, so let's handle types here rather | |
1365 | than check TYPE_P in multiple places below. */ | |
1366 | if (TYPE_P (t)) | |
1367 | return strip_typedefs (t); | |
1368 | ||
1369 | code = TREE_CODE (t); | |
1370 | switch (code) | |
1371 | { | |
1372 | case IDENTIFIER_NODE: | |
1373 | case TEMPLATE_PARM_INDEX: | |
1374 | case OVERLOAD: | |
1375 | case BASELINK: | |
1376 | case ARGUMENT_PACK_SELECT: | |
1377 | return t; | |
1378 | ||
1379 | case TRAIT_EXPR: | |
1380 | { | |
1381 | tree type1 = strip_typedefs (TRAIT_EXPR_TYPE1 (t)); | |
1382 | tree type2 = strip_typedefs (TRAIT_EXPR_TYPE2 (t)); | |
1383 | if (type1 == TRAIT_EXPR_TYPE1 (t) | |
1384 | && type2 == TRAIT_EXPR_TYPE2 (t)) | |
1385 | return t; | |
1386 | r = copy_node (t); | |
1387 | TRAIT_EXPR_TYPE1 (t) = type1; | |
1388 | TRAIT_EXPR_TYPE2 (t) = type2; | |
1389 | return r; | |
1390 | } | |
1391 | ||
1392 | case TREE_LIST: | |
1393 | { | |
9771b263 | 1394 | vec<tree, va_gc> *vec = make_tree_vector (); |
49bb4bbe JM |
1395 | bool changed = false; |
1396 | tree it; | |
1397 | for (it = t; it; it = TREE_CHAIN (it)) | |
1398 | { | |
1399 | tree val = strip_typedefs_expr (TREE_VALUE (t)); | |
9771b263 | 1400 | vec_safe_push (vec, val); |
49bb4bbe JM |
1401 | if (val != TREE_VALUE (t)) |
1402 | changed = true; | |
1403 | gcc_assert (TREE_PURPOSE (it) == NULL_TREE); | |
1404 | } | |
1405 | if (changed) | |
1406 | { | |
1407 | r = NULL_TREE; | |
9771b263 | 1408 | FOR_EACH_VEC_ELT_REVERSE (*vec, i, it) |
49bb4bbe JM |
1409 | r = tree_cons (NULL_TREE, it, r); |
1410 | } | |
1411 | else | |
1412 | r = t; | |
1413 | release_tree_vector (vec); | |
1414 | return r; | |
1415 | } | |
1416 | ||
1417 | case TREE_VEC: | |
1418 | { | |
1419 | bool changed = false; | |
9771b263 | 1420 | vec<tree, va_gc> *vec = make_tree_vector (); |
49bb4bbe | 1421 | n = TREE_VEC_LENGTH (t); |
9771b263 | 1422 | vec_safe_reserve (vec, n); |
49bb4bbe JM |
1423 | for (i = 0; i < n; ++i) |
1424 | { | |
1425 | tree op = strip_typedefs_expr (TREE_VEC_ELT (t, i)); | |
9771b263 | 1426 | vec->quick_push (op); |
49bb4bbe JM |
1427 | if (op != TREE_VEC_ELT (t, i)) |
1428 | changed = true; | |
1429 | } | |
1430 | if (changed) | |
1431 | { | |
1432 | r = copy_node (t); | |
1433 | for (i = 0; i < n; ++i) | |
9771b263 | 1434 | TREE_VEC_ELT (r, i) = (*vec)[i]; |
7349ed05 JJ |
1435 | NON_DEFAULT_TEMPLATE_ARGS_COUNT (r) |
1436 | = NON_DEFAULT_TEMPLATE_ARGS_COUNT (t); | |
49bb4bbe JM |
1437 | } |
1438 | else | |
1439 | r = t; | |
1440 | release_tree_vector (vec); | |
1441 | return r; | |
1442 | } | |
1443 | ||
1444 | case CONSTRUCTOR: | |
1445 | { | |
1446 | bool changed = false; | |
9771b263 DN |
1447 | vec<constructor_elt, va_gc> *vec |
1448 | = vec_safe_copy (CONSTRUCTOR_ELTS (t)); | |
49bb4bbe JM |
1449 | n = CONSTRUCTOR_NELTS (t); |
1450 | type = strip_typedefs (TREE_TYPE (t)); | |
1451 | for (i = 0; i < n; ++i) | |
1452 | { | |
9771b263 | 1453 | constructor_elt *e = &(*vec)[i]; |
49bb4bbe JM |
1454 | tree op = strip_typedefs_expr (e->value); |
1455 | if (op != e->value) | |
1456 | { | |
1457 | changed = true; | |
1458 | e->value = op; | |
1459 | } | |
1460 | gcc_checking_assert (e->index == strip_typedefs_expr (e->index)); | |
1461 | } | |
1462 | ||
1463 | if (!changed && type == TREE_TYPE (t)) | |
1464 | { | |
9771b263 | 1465 | vec_free (vec); |
49bb4bbe JM |
1466 | return t; |
1467 | } | |
1468 | else | |
1469 | { | |
1470 | r = copy_node (t); | |
1471 | TREE_TYPE (r) = type; | |
1472 | CONSTRUCTOR_ELTS (r) = vec; | |
1473 | return r; | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | case LAMBDA_EXPR: | |
8e519a8b JM |
1478 | error ("lambda-expression in a constant expression"); |
1479 | return error_mark_node; | |
49bb4bbe JM |
1480 | |
1481 | default: | |
1482 | break; | |
1483 | } | |
1484 | ||
1485 | gcc_assert (EXPR_P (t)); | |
1486 | ||
1487 | n = TREE_OPERAND_LENGTH (t); | |
1488 | ops = XALLOCAVEC (tree, n); | |
1489 | type = TREE_TYPE (t); | |
1490 | ||
1491 | switch (code) | |
1492 | { | |
1493 | CASE_CONVERT: | |
1494 | case IMPLICIT_CONV_EXPR: | |
1495 | case DYNAMIC_CAST_EXPR: | |
1496 | case STATIC_CAST_EXPR: | |
1497 | case CONST_CAST_EXPR: | |
1498 | case REINTERPRET_CAST_EXPR: | |
1499 | case CAST_EXPR: | |
1500 | case NEW_EXPR: | |
1501 | type = strip_typedefs (type); | |
1502 | /* fallthrough */ | |
1503 | ||
1504 | default: | |
1505 | for (i = 0; i < n; ++i) | |
1506 | ops[i] = strip_typedefs_expr (TREE_OPERAND (t, i)); | |
1507 | break; | |
1508 | } | |
1509 | ||
1510 | /* If nothing changed, return t. */ | |
1511 | for (i = 0; i < n; ++i) | |
1512 | if (ops[i] != TREE_OPERAND (t, i)) | |
1513 | break; | |
1514 | if (i == n && type == TREE_TYPE (t)) | |
1515 | return t; | |
1516 | ||
1517 | r = copy_node (t); | |
1518 | TREE_TYPE (r) = type; | |
1519 | for (i = 0; i < n; ++i) | |
1520 | TREE_OPERAND (r, i) = ops[i]; | |
1521 | return r; | |
1522 | } | |
1523 | ||
48b45647 NS |
1524 | /* Makes a copy of BINFO and TYPE, which is to be inherited into a |
1525 | graph dominated by T. If BINFO is NULL, TYPE is a dependent base, | |
1526 | and we do a shallow copy. If BINFO is non-NULL, we do a deep copy. | |
1527 | VIRT indicates whether TYPE is inherited virtually or not. | |
1528 | IGO_PREV points at the previous binfo of the inheritance graph | |
1529 | order chain. The newly copied binfo's TREE_CHAIN forms this | |
1530 | ordering. | |
1531 | ||
1532 | The CLASSTYPE_VBASECLASSES vector of T is constructed in the | |
1533 | correct order. That is in the order the bases themselves should be | |
1534 | constructed in. | |
dbbf88d1 NS |
1535 | |
1536 | The BINFO_INHERITANCE of a virtual base class points to the binfo | |
48b45647 NS |
1537 | of the most derived type. ??? We could probably change this so that |
1538 | BINFO_INHERITANCE becomes synonymous with BINFO_PRIMARY, and hence | |
1539 | remove a field. They currently can only differ for primary virtual | |
1540 | virtual bases. */ | |
dbbf88d1 NS |
1541 | |
1542 | tree | |
48b45647 | 1543 | copy_binfo (tree binfo, tree type, tree t, tree *igo_prev, int virt) |
9a71c18b | 1544 | { |
48b45647 | 1545 | tree new_binfo; |
9a71c18b | 1546 | |
48b45647 NS |
1547 | if (virt) |
1548 | { | |
1549 | /* See if we've already made this virtual base. */ | |
1550 | new_binfo = binfo_for_vbase (type, t); | |
1551 | if (new_binfo) | |
1552 | return new_binfo; | |
1553 | } | |
9f63daea | 1554 | |
fa743e8c | 1555 | new_binfo = make_tree_binfo (binfo ? BINFO_N_BASE_BINFOS (binfo) : 0); |
48b45647 | 1556 | BINFO_TYPE (new_binfo) = type; |
9a71c18b | 1557 | |
48b45647 NS |
1558 | /* Chain it into the inheritance graph. */ |
1559 | TREE_CHAIN (*igo_prev) = new_binfo; | |
1560 | *igo_prev = new_binfo; | |
9f63daea | 1561 | |
05262294 | 1562 | if (binfo && !BINFO_DEPENDENT_BASE_P (binfo)) |
dfbcd65a | 1563 | { |
fa743e8c NS |
1564 | int ix; |
1565 | tree base_binfo; | |
9f63daea | 1566 | |
539ed333 | 1567 | gcc_assert (SAME_BINFO_TYPE_P (BINFO_TYPE (binfo), type)); |
9f63daea | 1568 | |
48b45647 NS |
1569 | BINFO_OFFSET (new_binfo) = BINFO_OFFSET (binfo); |
1570 | BINFO_VIRTUALS (new_binfo) = BINFO_VIRTUALS (binfo); | |
9f63daea | 1571 | |
fa743e8c NS |
1572 | /* We do not need to copy the accesses, as they are read only. */ |
1573 | BINFO_BASE_ACCESSES (new_binfo) = BINFO_BASE_ACCESSES (binfo); | |
9f63daea | 1574 | |
48b45647 | 1575 | /* Recursively copy base binfos of BINFO. */ |
fa743e8c | 1576 | for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++) |
dbbf88d1 | 1577 | { |
48b45647 | 1578 | tree new_base_binfo; |
48b45647 NS |
1579 | new_base_binfo = copy_binfo (base_binfo, BINFO_TYPE (base_binfo), |
1580 | t, igo_prev, | |
1581 | BINFO_VIRTUAL_P (base_binfo)); | |
9f63daea | 1582 | |
48b45647 NS |
1583 | if (!BINFO_INHERITANCE_CHAIN (new_base_binfo)) |
1584 | BINFO_INHERITANCE_CHAIN (new_base_binfo) = new_binfo; | |
fa743e8c | 1585 | BINFO_BASE_APPEND (new_binfo, new_base_binfo); |
dbbf88d1 | 1586 | } |
9a71c18b | 1587 | } |
48b45647 NS |
1588 | else |
1589 | BINFO_DEPENDENT_BASE_P (new_binfo) = 1; | |
9f63daea | 1590 | |
48b45647 NS |
1591 | if (virt) |
1592 | { | |
1593 | /* Push it onto the list after any virtual bases it contains | |
1594 | will have been pushed. */ | |
9771b263 | 1595 | CLASSTYPE_VBASECLASSES (t)->quick_push (new_binfo); |
48b45647 NS |
1596 | BINFO_VIRTUAL_P (new_binfo) = 1; |
1597 | BINFO_INHERITANCE_CHAIN (new_binfo) = TYPE_BINFO (t); | |
1598 | } | |
9f63daea | 1599 | |
48b45647 | 1600 | return new_binfo; |
9a71c18b | 1601 | } |
8d08fdba MS |
1602 | \f |
1603 | /* Hashing of lists so that we don't make duplicates. | |
1604 | The entry point is `list_hash_canon'. */ | |
1605 | ||
8d08fdba MS |
1606 | /* Now here is the hash table. When recording a list, it is added |
1607 | to the slot whose index is the hash code mod the table size. | |
1608 | Note that the hash table is used for several kinds of lists. | |
1609 | While all these live in the same table, they are completely independent, | |
1610 | and the hash code is computed differently for each of these. */ | |
1611 | ||
e2500fed | 1612 | static GTY ((param_is (union tree_node))) htab_t list_hash_table; |
9ccb25d5 | 1613 | |
9f63daea | 1614 | struct list_proxy |
9ccb25d5 MM |
1615 | { |
1616 | tree purpose; | |
1617 | tree value; | |
1618 | tree chain; | |
1619 | }; | |
1620 | ||
1621 | /* Compare ENTRY (an entry in the hash table) with DATA (a list_proxy | |
1622 | for a node we are thinking about adding). */ | |
1623 | ||
1624 | static int | |
b57b79f7 | 1625 | list_hash_eq (const void* entry, const void* data) |
9ccb25d5 | 1626 | { |
741ac903 KG |
1627 | const_tree const t = (const_tree) entry; |
1628 | const struct list_proxy *const proxy = (const struct list_proxy *) data; | |
9ccb25d5 MM |
1629 | |
1630 | return (TREE_VALUE (t) == proxy->value | |
1631 | && TREE_PURPOSE (t) == proxy->purpose | |
1632 | && TREE_CHAIN (t) == proxy->chain); | |
1633 | } | |
8d08fdba MS |
1634 | |
1635 | /* Compute a hash code for a list (chain of TREE_LIST nodes | |
1636 | with goodies in the TREE_PURPOSE, TREE_VALUE, and bits of the | |
1637 | TREE_COMMON slots), by adding the hash codes of the individual entries. */ | |
1638 | ||
9ccb25d5 | 1639 | static hashval_t |
b57b79f7 | 1640 | list_hash_pieces (tree purpose, tree value, tree chain) |
8d08fdba | 1641 | { |
9ccb25d5 | 1642 | hashval_t hashcode = 0; |
9f63daea | 1643 | |
37c46b43 | 1644 | if (chain) |
fd917e0d | 1645 | hashcode += TREE_HASH (chain); |
9f63daea | 1646 | |
37c46b43 | 1647 | if (value) |
fd917e0d | 1648 | hashcode += TREE_HASH (value); |
8d08fdba MS |
1649 | else |
1650 | hashcode += 1007; | |
37c46b43 | 1651 | if (purpose) |
fd917e0d | 1652 | hashcode += TREE_HASH (purpose); |
8d08fdba MS |
1653 | else |
1654 | hashcode += 1009; | |
1655 | return hashcode; | |
1656 | } | |
1657 | ||
9ccb25d5 | 1658 | /* Hash an already existing TREE_LIST. */ |
8d08fdba | 1659 | |
9ccb25d5 | 1660 | static hashval_t |
b57b79f7 | 1661 | list_hash (const void* p) |
8d08fdba | 1662 | { |
741ac903 | 1663 | const_tree const t = (const_tree) p; |
9f63daea EC |
1664 | return list_hash_pieces (TREE_PURPOSE (t), |
1665 | TREE_VALUE (t), | |
9ccb25d5 | 1666 | TREE_CHAIN (t)); |
8d08fdba MS |
1667 | } |
1668 | ||
51632249 JM |
1669 | /* Given list components PURPOSE, VALUE, AND CHAIN, return the canonical |
1670 | object for an identical list if one already exists. Otherwise, build a | |
1671 | new one, and record it as the canonical object. */ | |
8d08fdba | 1672 | |
8d08fdba | 1673 | tree |
b57b79f7 | 1674 | hash_tree_cons (tree purpose, tree value, tree chain) |
8d08fdba | 1675 | { |
a703fb38 | 1676 | int hashcode = 0; |
fad205ff | 1677 | void **slot; |
9ccb25d5 MM |
1678 | struct list_proxy proxy; |
1679 | ||
1680 | /* Hash the list node. */ | |
1681 | hashcode = list_hash_pieces (purpose, value, chain); | |
1682 | /* Create a proxy for the TREE_LIST we would like to create. We | |
1683 | don't actually create it so as to avoid creating garbage. */ | |
1684 | proxy.purpose = purpose; | |
1685 | proxy.value = value; | |
1686 | proxy.chain = chain; | |
1687 | /* See if it is already in the table. */ | |
1688 | slot = htab_find_slot_with_hash (list_hash_table, &proxy, hashcode, | |
1689 | INSERT); | |
1690 | /* If not, create a new node. */ | |
1691 | if (!*slot) | |
fad205ff | 1692 | *slot = tree_cons (purpose, value, chain); |
67f5655f | 1693 | return (tree) *slot; |
8d08fdba MS |
1694 | } |
1695 | ||
1696 | /* Constructor for hashed lists. */ | |
e92cc029 | 1697 | |
8d08fdba | 1698 | tree |
b57b79f7 | 1699 | hash_tree_chain (tree value, tree chain) |
8d08fdba | 1700 | { |
51632249 | 1701 | return hash_tree_cons (NULL_TREE, value, chain); |
8d08fdba | 1702 | } |
8d08fdba | 1703 | \f |
8d08fdba | 1704 | void |
b57b79f7 | 1705 | debug_binfo (tree elem) |
8d08fdba | 1706 | { |
fed3cef0 | 1707 | HOST_WIDE_INT n; |
8d08fdba MS |
1708 | tree virtuals; |
1709 | ||
90ff44cf KG |
1710 | fprintf (stderr, "type \"%s\", offset = " HOST_WIDE_INT_PRINT_DEC |
1711 | "\nvtable type:\n", | |
1712 | TYPE_NAME_STRING (BINFO_TYPE (elem)), | |
fed3cef0 | 1713 | TREE_INT_CST_LOW (BINFO_OFFSET (elem))); |
8d08fdba MS |
1714 | debug_tree (BINFO_TYPE (elem)); |
1715 | if (BINFO_VTABLE (elem)) | |
fed3cef0 | 1716 | fprintf (stderr, "vtable decl \"%s\"\n", |
c35cce41 | 1717 | IDENTIFIER_POINTER (DECL_NAME (get_vtbl_decl_for_binfo (elem)))); |
8d08fdba MS |
1718 | else |
1719 | fprintf (stderr, "no vtable decl yet\n"); | |
1720 | fprintf (stderr, "virtuals:\n"); | |
da3d4dfa | 1721 | virtuals = BINFO_VIRTUALS (elem); |
1f84ec23 | 1722 | n = 0; |
f30432d7 | 1723 | |
8d08fdba MS |
1724 | while (virtuals) |
1725 | { | |
83f2ccf4 | 1726 | tree fndecl = TREE_VALUE (virtuals); |
71e89f27 | 1727 | fprintf (stderr, "%s [%ld =? %ld]\n", |
8d08fdba | 1728 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)), |
71e89f27 | 1729 | (long) n, (long) TREE_INT_CST_LOW (DECL_VINDEX (fndecl))); |
f30432d7 | 1730 | ++n; |
8d08fdba | 1731 | virtuals = TREE_CHAIN (virtuals); |
8d08fdba MS |
1732 | } |
1733 | } | |
1734 | ||
02ed62dd MM |
1735 | /* Build a representation for the qualified name SCOPE::NAME. TYPE is |
1736 | the type of the result expression, if known, or NULL_TREE if the | |
1737 | resulting expression is type-dependent. If TEMPLATE_P is true, | |
1738 | NAME is known to be a template because the user explicitly used the | |
3db45ab5 | 1739 | "template" keyword after the "::". |
02ed62dd MM |
1740 | |
1741 | All SCOPE_REFs should be built by use of this function. */ | |
1742 | ||
1743 | tree | |
1744 | build_qualified_name (tree type, tree scope, tree name, bool template_p) | |
1745 | { | |
1746 | tree t; | |
36569397 MM |
1747 | if (type == error_mark_node |
1748 | || scope == error_mark_node | |
1749 | || name == error_mark_node) | |
1750 | return error_mark_node; | |
02ed62dd MM |
1751 | t = build2 (SCOPE_REF, type, scope, name); |
1752 | QUALIFIED_NAME_IS_TEMPLATE (t) = template_p; | |
d816a3ba | 1753 | PTRMEM_OK_P (t) = true; |
7097b3ac JM |
1754 | if (type) |
1755 | t = convert_from_reference (t); | |
02ed62dd MM |
1756 | return t; |
1757 | } | |
1758 | ||
2eed8e37 BK |
1759 | /* Like check_qualified_type, but also check ref-qualifier and exception |
1760 | specification. */ | |
1761 | ||
1762 | static bool | |
1763 | cp_check_qualified_type (const_tree cand, const_tree base, int type_quals, | |
1764 | cp_ref_qualifier rqual, tree raises) | |
1765 | { | |
1766 | return (check_qualified_type (cand, base, type_quals) | |
1767 | && comp_except_specs (raises, TYPE_RAISES_EXCEPTIONS (cand), | |
1768 | ce_exact) | |
1769 | && type_memfn_rqual (cand) == rqual); | |
1770 | } | |
1771 | ||
1772 | /* Build the FUNCTION_TYPE or METHOD_TYPE with the ref-qualifier RQUAL. */ | |
1773 | ||
1774 | tree | |
1775 | build_ref_qualified_type (tree type, cp_ref_qualifier rqual) | |
1776 | { | |
1777 | tree t; | |
1778 | ||
1779 | if (rqual == type_memfn_rqual (type)) | |
1780 | return type; | |
1781 | ||
1782 | int type_quals = TYPE_QUALS (type); | |
1783 | tree raises = TYPE_RAISES_EXCEPTIONS (type); | |
1784 | for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) | |
1785 | if (cp_check_qualified_type (t, type, type_quals, rqual, raises)) | |
1786 | return t; | |
1787 | ||
1788 | t = build_variant_type_copy (type); | |
1789 | switch (rqual) | |
1790 | { | |
1791 | case REF_QUAL_RVALUE: | |
1792 | FUNCTION_RVALUE_QUALIFIED (t) = 1; | |
39bde5ea JM |
1793 | FUNCTION_REF_QUALIFIED (t) = 1; |
1794 | break; | |
2eed8e37 | 1795 | case REF_QUAL_LVALUE: |
39bde5ea | 1796 | FUNCTION_RVALUE_QUALIFIED (t) = 0; |
2eed8e37 BK |
1797 | FUNCTION_REF_QUALIFIED (t) = 1; |
1798 | break; | |
1799 | default: | |
1800 | FUNCTION_REF_QUALIFIED (t) = 0; | |
1801 | break; | |
1802 | } | |
1803 | ||
1804 | if (TYPE_STRUCTURAL_EQUALITY_P (type)) | |
1805 | /* Propagate structural equality. */ | |
1806 | SET_TYPE_STRUCTURAL_EQUALITY (t); | |
1807 | else if (TYPE_CANONICAL (type) != type) | |
1808 | /* Build the underlying canonical type, since it is different | |
1809 | from TYPE. */ | |
1810 | TYPE_CANONICAL (t) = build_ref_qualified_type (TYPE_CANONICAL (type), | |
1811 | rqual); | |
1812 | else | |
1813 | /* T is its own canonical type. */ | |
1814 | TYPE_CANONICAL (t) = t; | |
1815 | ||
1816 | return t; | |
1817 | } | |
1818 | ||
3b426391 | 1819 | /* Returns nonzero if X is an expression for a (possibly overloaded) |
eff3a276 MM |
1820 | function. If "f" is a function or function template, "f", "c->f", |
1821 | "c.f", "C::f", and "f<int>" will all be considered possibly | |
1822 | overloaded functions. Returns 2 if the function is actually | |
b9704fc5 | 1823 | overloaded, i.e., if it is impossible to know the type of the |
eff3a276 MM |
1824 | function without performing overload resolution. */ |
1825 | ||
8d08fdba | 1826 | int |
b57b79f7 | 1827 | is_overloaded_fn (tree x) |
8d08fdba | 1828 | { |
4bb0968f | 1829 | /* A baselink is also considered an overloaded function. */ |
ccbe00a4 JM |
1830 | if (TREE_CODE (x) == OFFSET_REF |
1831 | || TREE_CODE (x) == COMPONENT_REF) | |
05e0b2f4 | 1832 | x = TREE_OPERAND (x, 1); |
4bb0968f | 1833 | if (BASELINK_P (x)) |
da15dae6 | 1834 | x = BASELINK_FUNCTIONS (x); |
d095e03c JM |
1835 | if (TREE_CODE (x) == TEMPLATE_ID_EXPR) |
1836 | x = TREE_OPERAND (x, 0); | |
1837 | if (DECL_FUNCTION_TEMPLATE_P (OVL_CURRENT (x)) | |
eff3a276 MM |
1838 | || (TREE_CODE (x) == OVERLOAD && OVL_CHAIN (x))) |
1839 | return 2; | |
1840 | return (TREE_CODE (x) == FUNCTION_DECL | |
1841 | || TREE_CODE (x) == OVERLOAD); | |
8d08fdba MS |
1842 | } |
1843 | ||
f7d605ac JM |
1844 | /* X is the CALL_EXPR_FN of a CALL_EXPR. If X represents a dependent name |
1845 | (14.6.2), return the IDENTIFIER_NODE for that name. Otherwise, return | |
1846 | NULL_TREE. */ | |
1847 | ||
4b6aaa99 | 1848 | tree |
f7d605ac JM |
1849 | dependent_name (tree x) |
1850 | { | |
9dc6f476 | 1851 | if (identifier_p (x)) |
f7d605ac JM |
1852 | return x; |
1853 | if (TREE_CODE (x) != COMPONENT_REF | |
d54ce1df JM |
1854 | && TREE_CODE (x) != OFFSET_REF |
1855 | && TREE_CODE (x) != BASELINK | |
f7d605ac JM |
1856 | && is_overloaded_fn (x)) |
1857 | return DECL_NAME (get_first_fn (x)); | |
1858 | return NULL_TREE; | |
1859 | } | |
1860 | ||
eff3a276 MM |
1861 | /* Returns true iff X is an expression for an overloaded function |
1862 | whose type cannot be known without performing overload | |
1863 | resolution. */ | |
1864 | ||
1865 | bool | |
b57b79f7 | 1866 | really_overloaded_fn (tree x) |
9f63daea | 1867 | { |
eff3a276 | 1868 | return is_overloaded_fn (x) == 2; |
8926095f MS |
1869 | } |
1870 | ||
8d08fdba | 1871 | tree |
294e855f | 1872 | get_fns (tree from) |
8d08fdba | 1873 | { |
50bc768d | 1874 | gcc_assert (is_overloaded_fn (from)); |
c6002625 | 1875 | /* A baselink is also considered an overloaded function. */ |
7e361ae6 JM |
1876 | if (TREE_CODE (from) == OFFSET_REF |
1877 | || TREE_CODE (from) == COMPONENT_REF) | |
ccbe00a4 | 1878 | from = TREE_OPERAND (from, 1); |
4bb0968f | 1879 | if (BASELINK_P (from)) |
da15dae6 | 1880 | from = BASELINK_FUNCTIONS (from); |
d095e03c JM |
1881 | if (TREE_CODE (from) == TEMPLATE_ID_EXPR) |
1882 | from = TREE_OPERAND (from, 0); | |
294e855f JM |
1883 | return from; |
1884 | } | |
1885 | ||
1886 | tree | |
1887 | get_first_fn (tree from) | |
1888 | { | |
1889 | return OVL_CURRENT (get_fns (from)); | |
2c73f9f5 | 1890 | } |
8d08fdba | 1891 | |
c6002625 | 1892 | /* Return a new OVL node, concatenating it with the old one. */ |
2c73f9f5 ML |
1893 | |
1894 | tree | |
b57b79f7 | 1895 | ovl_cons (tree decl, tree chain) |
2c73f9f5 ML |
1896 | { |
1897 | tree result = make_node (OVERLOAD); | |
1898 | TREE_TYPE (result) = unknown_type_node; | |
1899 | OVL_FUNCTION (result) = decl; | |
1900 | TREE_CHAIN (result) = chain; | |
9f63daea | 1901 | |
2c73f9f5 ML |
1902 | return result; |
1903 | } | |
1904 | ||
2c73f9f5 ML |
1905 | /* Build a new overloaded function. If this is the first one, |
1906 | just return it; otherwise, ovl_cons the _DECLs */ | |
1907 | ||
1908 | tree | |
b57b79f7 | 1909 | build_overload (tree decl, tree chain) |
2c73f9f5 | 1910 | { |
161c12b0 | 1911 | if (! chain && TREE_CODE (decl) != TEMPLATE_DECL) |
2c73f9f5 | 1912 | return decl; |
2c73f9f5 | 1913 | return ovl_cons (decl, chain); |
73452ce7 DS |
1914 | } |
1915 | ||
aef3a6b2 JM |
1916 | /* Return the scope where the overloaded functions OVL were found. */ |
1917 | ||
1918 | tree | |
1919 | ovl_scope (tree ovl) | |
1920 | { | |
1921 | if (TREE_CODE (ovl) == OFFSET_REF | |
1922 | || TREE_CODE (ovl) == COMPONENT_REF) | |
1923 | ovl = TREE_OPERAND (ovl, 1); | |
1924 | if (TREE_CODE (ovl) == BASELINK) | |
1925 | return BINFO_TYPE (BASELINK_BINFO (ovl)); | |
1926 | if (TREE_CODE (ovl) == TEMPLATE_ID_EXPR) | |
1927 | ovl = TREE_OPERAND (ovl, 0); | |
1928 | /* Skip using-declarations. */ | |
1929 | while (TREE_CODE (ovl) == OVERLOAD && OVL_USED (ovl) && OVL_CHAIN (ovl)) | |
1930 | ovl = OVL_CHAIN (ovl); | |
1931 | return CP_DECL_CONTEXT (OVL_CURRENT (ovl)); | |
1932 | } | |
1933 | ||
73452ce7 DS |
1934 | /* Return TRUE if FN is a non-static member function, FALSE otherwise. |
1935 | This function looks into BASELINK and OVERLOAD nodes. */ | |
1936 | ||
1937 | bool | |
1938 | non_static_member_function_p (tree fn) | |
1939 | { | |
1940 | if (fn == NULL_TREE) | |
1941 | return false; | |
1942 | ||
1943 | if (is_overloaded_fn (fn)) | |
1944 | fn = get_first_fn (fn); | |
1945 | ||
1946 | return (DECL_P (fn) | |
1947 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (fn)); | |
2c73f9f5 ML |
1948 | } |
1949 | ||
8d08fdba MS |
1950 | \f |
1951 | #define PRINT_RING_SIZE 4 | |
1952 | ||
f41c4af3 JM |
1953 | static const char * |
1954 | cxx_printable_name_internal (tree decl, int v, bool translate) | |
8d08fdba | 1955 | { |
1bde0042 | 1956 | static unsigned int uid_ring[PRINT_RING_SIZE]; |
8d08fdba | 1957 | static char *print_ring[PRINT_RING_SIZE]; |
f41c4af3 | 1958 | static bool trans_ring[PRINT_RING_SIZE]; |
8d08fdba MS |
1959 | static int ring_counter; |
1960 | int i; | |
1961 | ||
1962 | /* Only cache functions. */ | |
2ba25f50 MS |
1963 | if (v < 2 |
1964 | || TREE_CODE (decl) != FUNCTION_DECL | |
8d08fdba | 1965 | || DECL_LANG_SPECIFIC (decl) == 0) |
f41c4af3 | 1966 | return lang_decl_name (decl, v, translate); |
8d08fdba MS |
1967 | |
1968 | /* See if this print name is lying around. */ | |
1969 | for (i = 0; i < PRINT_RING_SIZE; i++) | |
f41c4af3 | 1970 | if (uid_ring[i] == DECL_UID (decl) && translate == trans_ring[i]) |
8d08fdba MS |
1971 | /* yes, so return it. */ |
1972 | return print_ring[i]; | |
1973 | ||
1974 | if (++ring_counter == PRINT_RING_SIZE) | |
1975 | ring_counter = 0; | |
1976 | ||
1977 | if (current_function_decl != NULL_TREE) | |
1978 | { | |
8fa6fa79 JM |
1979 | /* There may be both translated and untranslated versions of the |
1980 | name cached. */ | |
1981 | for (i = 0; i < 2; i++) | |
1982 | { | |
1983 | if (uid_ring[ring_counter] == DECL_UID (current_function_decl)) | |
1984 | ring_counter += 1; | |
1985 | if (ring_counter == PRINT_RING_SIZE) | |
1986 | ring_counter = 0; | |
1987 | } | |
1bde0042 | 1988 | gcc_assert (uid_ring[ring_counter] != DECL_UID (current_function_decl)); |
8d08fdba MS |
1989 | } |
1990 | ||
04695783 | 1991 | free (print_ring[ring_counter]); |
8d08fdba | 1992 | |
f41c4af3 | 1993 | print_ring[ring_counter] = xstrdup (lang_decl_name (decl, v, translate)); |
1bde0042 | 1994 | uid_ring[ring_counter] = DECL_UID (decl); |
f41c4af3 | 1995 | trans_ring[ring_counter] = translate; |
8d08fdba MS |
1996 | return print_ring[ring_counter]; |
1997 | } | |
f41c4af3 JM |
1998 | |
1999 | const char * | |
2000 | cxx_printable_name (tree decl, int v) | |
2001 | { | |
2002 | return cxx_printable_name_internal (decl, v, false); | |
2003 | } | |
2004 | ||
2005 | const char * | |
2006 | cxx_printable_name_translate (tree decl, int v) | |
2007 | { | |
2008 | return cxx_printable_name_internal (decl, v, true); | |
2009 | } | |
8d08fdba | 2010 | \f |
f30432d7 | 2011 | /* Build the FUNCTION_TYPE or METHOD_TYPE which may throw exceptions |
8d08fdba | 2012 | listed in RAISES. */ |
e92cc029 | 2013 | |
8d08fdba | 2014 | tree |
b57b79f7 | 2015 | build_exception_variant (tree type, tree raises) |
8d08fdba | 2016 | { |
3a55fb4c JM |
2017 | tree v; |
2018 | int type_quals; | |
8d08fdba | 2019 | |
3a55fb4c JM |
2020 | if (comp_except_specs (raises, TYPE_RAISES_EXCEPTIONS (type), ce_exact)) |
2021 | return type; | |
2022 | ||
2023 | type_quals = TYPE_QUALS (type); | |
2eed8e37 | 2024 | cp_ref_qualifier rqual = type_memfn_rqual (type); |
3a55fb4c | 2025 | for (v = TYPE_MAIN_VARIANT (type); v; v = TYPE_NEXT_VARIANT (v)) |
2eed8e37 | 2026 | if (cp_check_qualified_type (v, type, type_quals, rqual, raises)) |
4cc1d462 | 2027 | return v; |
8d08fdba MS |
2028 | |
2029 | /* Need to build a new variant. */ | |
8dd16ecc | 2030 | v = build_variant_type_copy (type); |
8d08fdba MS |
2031 | TYPE_RAISES_EXCEPTIONS (v) = raises; |
2032 | return v; | |
2033 | } | |
2034 | ||
dac65501 KL |
2035 | /* Given a TEMPLATE_TEMPLATE_PARM node T, create a new |
2036 | BOUND_TEMPLATE_TEMPLATE_PARM bound with NEWARGS as its template | |
1899c3a4 | 2037 | arguments. */ |
73b0fce8 KL |
2038 | |
2039 | tree | |
b57b79f7 | 2040 | bind_template_template_parm (tree t, tree newargs) |
73b0fce8 | 2041 | { |
1899c3a4 | 2042 | tree decl = TYPE_NAME (t); |
6b9b6b15 JM |
2043 | tree t2; |
2044 | ||
9e1e64ec | 2045 | t2 = cxx_make_type (BOUND_TEMPLATE_TEMPLATE_PARM); |
c2255bc4 AH |
2046 | decl = build_decl (input_location, |
2047 | TYPE_DECL, DECL_NAME (decl), NULL_TREE); | |
1899c3a4 | 2048 | |
dac65501 KL |
2049 | /* These nodes have to be created to reflect new TYPE_DECL and template |
2050 | arguments. */ | |
2051 | TEMPLATE_TYPE_PARM_INDEX (t2) = copy_node (TEMPLATE_TYPE_PARM_INDEX (t)); | |
2052 | TEMPLATE_PARM_DECL (TEMPLATE_TYPE_PARM_INDEX (t2)) = decl; | |
2053 | TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2) | |
aa373032 | 2054 | = build_template_info (TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL (t), newargs); |
6b9b6b15 | 2055 | |
1899c3a4 KL |
2056 | TREE_TYPE (decl) = t2; |
2057 | TYPE_NAME (t2) = decl; | |
2058 | TYPE_STUB_DECL (t2) = decl; | |
dac65501 | 2059 | TYPE_SIZE (t2) = 0; |
06d40de8 | 2060 | SET_TYPE_STRUCTURAL_EQUALITY (t2); |
73b0fce8 | 2061 | |
73b0fce8 KL |
2062 | return t2; |
2063 | } | |
2064 | ||
bf3428d0 | 2065 | /* Called from count_trees via walk_tree. */ |
297a5329 JM |
2066 | |
2067 | static tree | |
44de5aeb | 2068 | count_trees_r (tree *tp, int *walk_subtrees, void *data) |
297a5329 | 2069 | { |
44de5aeb RK |
2070 | ++*((int *) data); |
2071 | ||
2072 | if (TYPE_P (*tp)) | |
2073 | *walk_subtrees = 0; | |
2074 | ||
297a5329 JM |
2075 | return NULL_TREE; |
2076 | } | |
2077 | ||
2078 | /* Debugging function for measuring the rough complexity of a tree | |
2079 | representation. */ | |
2080 | ||
2081 | int | |
b57b79f7 | 2082 | count_trees (tree t) |
297a5329 | 2083 | { |
bf3428d0 | 2084 | int n_trees = 0; |
14588106 | 2085 | cp_walk_tree_without_duplicates (&t, count_trees_r, &n_trees); |
297a5329 | 2086 | return n_trees; |
9f63daea | 2087 | } |
297a5329 | 2088 | |
b2244c65 MM |
2089 | /* Called from verify_stmt_tree via walk_tree. */ |
2090 | ||
2091 | static tree | |
12308bc6 | 2092 | verify_stmt_tree_r (tree* tp, int * /*walk_subtrees*/, void* data) |
b2244c65 MM |
2093 | { |
2094 | tree t = *tp; | |
c203e8a7 TS |
2095 | hash_table<pointer_hash <tree_node> > *statements |
2096 | = static_cast <hash_table<pointer_hash <tree_node> > *> (data); | |
703c8606 | 2097 | tree_node **slot; |
b2244c65 | 2098 | |
009ed910 | 2099 | if (!STATEMENT_CODE_P (TREE_CODE (t))) |
b2244c65 MM |
2100 | return NULL_TREE; |
2101 | ||
2102 | /* If this statement is already present in the hash table, then | |
2103 | there is a circularity in the statement tree. */ | |
703c8606 | 2104 | gcc_assert (!statements->find (t)); |
9f63daea | 2105 | |
703c8606 | 2106 | slot = statements->find_slot (t, INSERT); |
b2244c65 MM |
2107 | *slot = t; |
2108 | ||
2109 | return NULL_TREE; | |
2110 | } | |
2111 | ||
2112 | /* Debugging function to check that the statement T has not been | |
2113 | corrupted. For now, this function simply checks that T contains no | |
2114 | circularities. */ | |
2115 | ||
2116 | void | |
b57b79f7 | 2117 | verify_stmt_tree (tree t) |
b2244c65 | 2118 | { |
c203e8a7 | 2119 | hash_table<pointer_hash <tree_node> > statements (37); |
14588106 | 2120 | cp_walk_tree (&t, verify_stmt_tree_r, &statements, NULL); |
b2244c65 MM |
2121 | } |
2122 | ||
50a6dbd7 | 2123 | /* Check if the type T depends on a type with no linkage and if so, return |
4684cd27 | 2124 | it. If RELAXED_P then do not consider a class type declared within |
ecc607fc | 2125 | a vague-linkage function to have no linkage. */ |
50a6dbd7 JM |
2126 | |
2127 | tree | |
4684cd27 | 2128 | no_linkage_check (tree t, bool relaxed_p) |
50a6dbd7 | 2129 | { |
caf43ca4 MM |
2130 | tree r; |
2131 | ||
2adeacc9 MM |
2132 | /* There's no point in checking linkage on template functions; we |
2133 | can't know their complete types. */ | |
2134 | if (processing_template_decl) | |
2135 | return NULL_TREE; | |
2136 | ||
caf43ca4 MM |
2137 | switch (TREE_CODE (t)) |
2138 | { | |
2139 | case RECORD_TYPE: | |
2140 | if (TYPE_PTRMEMFUNC_P (t)) | |
2141 | goto ptrmem; | |
e6d92cec | 2142 | /* Lambda types that don't have mangling scope have no linkage. We |
c7335680 | 2143 | check CLASSTYPE_LAMBDA_EXPR for error_mark_node because |
e6d92cec JM |
2144 | when we get here from pushtag none of the lambda information is |
2145 | set up yet, so we want to assume that the lambda has linkage and | |
2146 | fix it up later if not. */ | |
2147 | if (CLASSTYPE_LAMBDA_EXPR (t) | |
c7335680 | 2148 | && CLASSTYPE_LAMBDA_EXPR (t) != error_mark_node |
e6d92cec JM |
2149 | && LAMBDA_TYPE_EXTRA_SCOPE (t) == NULL_TREE) |
2150 | return t; | |
caf43ca4 MM |
2151 | /* Fall through. */ |
2152 | case UNION_TYPE: | |
2153 | if (!CLASS_TYPE_P (t)) | |
2154 | return NULL_TREE; | |
2155 | /* Fall through. */ | |
2156 | case ENUMERAL_TYPE: | |
ecc607fc | 2157 | /* Only treat anonymous types as having no linkage if they're at |
2f59d9e0 | 2158 | namespace scope. This is core issue 966. */ |
ecc607fc | 2159 | if (TYPE_ANONYMOUS_P (t) && TYPE_NAMESPACE_SCOPE_P (t)) |
caf43ca4 | 2160 | return t; |
ecc607fc | 2161 | |
e6d92cec | 2162 | for (r = CP_TYPE_CONTEXT (t); ; ) |
ecc607fc | 2163 | { |
e6d92cec JM |
2164 | /* If we're a nested type of a !TREE_PUBLIC class, we might not |
2165 | have linkage, or we might just be in an anonymous namespace. | |
2166 | If we're in a TREE_PUBLIC class, we have linkage. */ | |
2167 | if (TYPE_P (r) && !TREE_PUBLIC (TYPE_NAME (r))) | |
2168 | return no_linkage_check (TYPE_CONTEXT (t), relaxed_p); | |
2169 | else if (TREE_CODE (r) == FUNCTION_DECL) | |
2170 | { | |
d6dcdbd5 | 2171 | if (!relaxed_p || !vague_linkage_p (r)) |
e6d92cec JM |
2172 | return t; |
2173 | else | |
2174 | r = CP_DECL_CONTEXT (r); | |
2175 | } | |
ecc607fc | 2176 | else |
e6d92cec | 2177 | break; |
ecc607fc JM |
2178 | } |
2179 | ||
caf43ca4 MM |
2180 | return NULL_TREE; |
2181 | ||
2182 | case ARRAY_TYPE: | |
2183 | case POINTER_TYPE: | |
2184 | case REFERENCE_TYPE: | |
404c2aea | 2185 | case VECTOR_TYPE: |
4684cd27 | 2186 | return no_linkage_check (TREE_TYPE (t), relaxed_p); |
caf43ca4 MM |
2187 | |
2188 | case OFFSET_TYPE: | |
2189 | ptrmem: | |
4684cd27 MM |
2190 | r = no_linkage_check (TYPE_PTRMEM_POINTED_TO_TYPE (t), |
2191 | relaxed_p); | |
caf43ca4 MM |
2192 | if (r) |
2193 | return r; | |
4684cd27 | 2194 | return no_linkage_check (TYPE_PTRMEM_CLASS_TYPE (t), relaxed_p); |
caf43ca4 MM |
2195 | |
2196 | case METHOD_TYPE: | |
4684cd27 | 2197 | r = no_linkage_check (TYPE_METHOD_BASETYPE (t), relaxed_p); |
caf43ca4 MM |
2198 | if (r) |
2199 | return r; | |
2200 | /* Fall through. */ | |
2201 | case FUNCTION_TYPE: | |
2202 | { | |
2203 | tree parm; | |
9f63daea EC |
2204 | for (parm = TYPE_ARG_TYPES (t); |
2205 | parm && parm != void_list_node; | |
caf43ca4 MM |
2206 | parm = TREE_CHAIN (parm)) |
2207 | { | |
4684cd27 | 2208 | r = no_linkage_check (TREE_VALUE (parm), relaxed_p); |
caf43ca4 MM |
2209 | if (r) |
2210 | return r; | |
2211 | } | |
4684cd27 | 2212 | return no_linkage_check (TREE_TYPE (t), relaxed_p); |
caf43ca4 MM |
2213 | } |
2214 | ||
2215 | default: | |
2216 | return NULL_TREE; | |
2217 | } | |
50a6dbd7 JM |
2218 | } |
2219 | ||
5566b478 | 2220 | extern int depth_reached; |
5566b478 | 2221 | |
8d08fdba | 2222 | void |
b57b79f7 | 2223 | cxx_print_statistics (void) |
8d08fdba | 2224 | { |
8d08fdba MS |
2225 | print_search_statistics (); |
2226 | print_class_statistics (); | |
7dcfe861 | 2227 | print_template_statistics (); |
7aa6d18a SB |
2228 | if (GATHER_STATISTICS) |
2229 | fprintf (stderr, "maximum template instantiation depth reached: %d\n", | |
2230 | depth_reached); | |
8d08fdba MS |
2231 | } |
2232 | ||
e92cc029 MS |
2233 | /* Return, as an INTEGER_CST node, the number of elements for TYPE |
2234 | (which is an ARRAY_TYPE). This counts only elements of the top | |
2235 | array. */ | |
8d08fdba MS |
2236 | |
2237 | tree | |
b57b79f7 | 2238 | array_type_nelts_top (tree type) |
8d08fdba | 2239 | { |
db3927fb AH |
2240 | return fold_build2_loc (input_location, |
2241 | PLUS_EXPR, sizetype, | |
7866705a | 2242 | array_type_nelts (type), |
701e903a | 2243 | size_one_node); |
8d08fdba MS |
2244 | } |
2245 | ||
e92cc029 MS |
2246 | /* Return, as an INTEGER_CST node, the number of elements for TYPE |
2247 | (which is an ARRAY_TYPE). This one is a recursive count of all | |
2248 | ARRAY_TYPEs that are clumped together. */ | |
8d08fdba MS |
2249 | |
2250 | tree | |
b57b79f7 | 2251 | array_type_nelts_total (tree type) |
8d08fdba MS |
2252 | { |
2253 | tree sz = array_type_nelts_top (type); | |
2254 | type = TREE_TYPE (type); | |
2255 | while (TREE_CODE (type) == ARRAY_TYPE) | |
2256 | { | |
2257 | tree n = array_type_nelts_top (type); | |
db3927fb AH |
2258 | sz = fold_build2_loc (input_location, |
2259 | MULT_EXPR, sizetype, sz, n); | |
8d08fdba MS |
2260 | type = TREE_TYPE (type); |
2261 | } | |
2262 | return sz; | |
2263 | } | |
878cd289 | 2264 | |
b3ab27f3 MM |
2265 | /* Called from break_out_target_exprs via mapcar. */ |
2266 | ||
2267 | static tree | |
b57b79f7 | 2268 | bot_manip (tree* tp, int* walk_subtrees, void* data) |
878cd289 | 2269 | { |
8dfaeb63 MM |
2270 | splay_tree target_remap = ((splay_tree) data); |
2271 | tree t = *tp; | |
2272 | ||
edb7c512 | 2273 | if (!TYPE_P (t) && TREE_CONSTANT (t) && !TREE_SIDE_EFFECTS (t)) |
8dfaeb63 | 2274 | { |
a4d25b44 JM |
2275 | /* There can't be any TARGET_EXPRs or their slot variables below this |
2276 | point. But we must make a copy, in case subsequent processing | |
2277 | alters any part of it. For example, during gimplification a cast | |
2278 | of the form (T) &X::f (where "f" is a member function) will lead | |
2279 | to replacing the PTRMEM_CST for &X::f with a VAR_DECL. */ | |
8dfaeb63 | 2280 | *walk_subtrees = 0; |
a4d25b44 | 2281 | *tp = unshare_expr (t); |
8dfaeb63 MM |
2282 | return NULL_TREE; |
2283 | } | |
495d26d6 | 2284 | if (TREE_CODE (t) == TARGET_EXPR) |
73aad9b9 | 2285 | { |
b3ab27f3 MM |
2286 | tree u; |
2287 | ||
02531345 | 2288 | if (TREE_CODE (TREE_OPERAND (t, 1)) == AGGR_INIT_EXPR) |
875bcfdb JM |
2289 | { |
2290 | u = build_cplus_new (TREE_TYPE (t), TREE_OPERAND (t, 1), | |
2291 | tf_warning_or_error); | |
2292 | if (AGGR_INIT_ZERO_FIRST (TREE_OPERAND (t, 1))) | |
2293 | AGGR_INIT_ZERO_FIRST (TREE_OPERAND (u, 1)) = true; | |
2294 | } | |
9f63daea | 2295 | else |
574cfaa4 JM |
2296 | u = build_target_expr_with_type (TREE_OPERAND (t, 1), TREE_TYPE (t), |
2297 | tf_warning_or_error); | |
b3ab27f3 | 2298 | |
e08cc018 JM |
2299 | TARGET_EXPR_IMPLICIT_P (u) = TARGET_EXPR_IMPLICIT_P (t); |
2300 | TARGET_EXPR_LIST_INIT_P (u) = TARGET_EXPR_LIST_INIT_P (t); | |
2301 | TARGET_EXPR_DIRECT_INIT_P (u) = TARGET_EXPR_DIRECT_INIT_P (t); | |
2302 | ||
b3ab27f3 | 2303 | /* Map the old variable to the new one. */ |
9f63daea EC |
2304 | splay_tree_insert (target_remap, |
2305 | (splay_tree_key) TREE_OPERAND (t, 0), | |
b3ab27f3 | 2306 | (splay_tree_value) TREE_OPERAND (u, 0)); |
8dfaeb63 | 2307 | |
7efc22ea JM |
2308 | TREE_OPERAND (u, 1) = break_out_target_exprs (TREE_OPERAND (u, 1)); |
2309 | ||
8dfaeb63 MM |
2310 | /* Replace the old expression with the new version. */ |
2311 | *tp = u; | |
2312 | /* We don't have to go below this point; the recursive call to | |
2313 | break_out_target_exprs will have handled anything below this | |
2314 | point. */ | |
2315 | *walk_subtrees = 0; | |
2316 | return NULL_TREE; | |
73aad9b9 | 2317 | } |
73aad9b9 | 2318 | |
8dfaeb63 | 2319 | /* Make a copy of this node. */ |
5507a6c3 JM |
2320 | t = copy_tree_r (tp, walk_subtrees, NULL); |
2321 | if (TREE_CODE (*tp) == CALL_EXPR) | |
cfb1582c JM |
2322 | { |
2323 | set_flags_from_callee (*tp); | |
2324 | ||
2325 | /* builtin_LINE and builtin_FILE get the location where the default | |
2326 | argument is expanded, not where the call was written. */ | |
2327 | tree callee = get_callee_fndecl (*tp); | |
2328 | if (callee && DECL_BUILT_IN (callee)) | |
2329 | switch (DECL_FUNCTION_CODE (callee)) | |
2330 | { | |
2331 | case BUILT_IN_FILE: | |
2332 | case BUILT_IN_LINE: | |
2333 | SET_EXPR_LOCATION (*tp, input_location); | |
2334 | } | |
2335 | } | |
5507a6c3 | 2336 | return t; |
878cd289 | 2337 | } |
9f63daea | 2338 | |
8dfaeb63 MM |
2339 | /* Replace all remapped VAR_DECLs in T with their new equivalents. |
2340 | DATA is really a splay-tree mapping old variables to new | |
2341 | variables. */ | |
b3ab27f3 MM |
2342 | |
2343 | static tree | |
12308bc6 | 2344 | bot_replace (tree* t, int* /*walk_subtrees*/, void* data) |
b3ab27f3 | 2345 | { |
8dfaeb63 MM |
2346 | splay_tree target_remap = ((splay_tree) data); |
2347 | ||
5a6ccc94 | 2348 | if (VAR_P (*t)) |
b3ab27f3 MM |
2349 | { |
2350 | splay_tree_node n = splay_tree_lookup (target_remap, | |
2351 | (splay_tree_key) *t); | |
2352 | if (n) | |
2353 | *t = (tree) n->value; | |
2354 | } | |
382346e5 JM |
2355 | else if (TREE_CODE (*t) == PARM_DECL |
2356 | && DECL_NAME (*t) == this_identifier) | |
2357 | { | |
2358 | /* In an NSDMI we need to replace the 'this' parameter we used for | |
2359 | parsing with the real one for this function. */ | |
2360 | *t = current_class_ptr; | |
2361 | } | |
c65b0607 JM |
2362 | else if (TREE_CODE (*t) == CONVERT_EXPR |
2363 | && CONVERT_EXPR_VBASE_PATH (*t)) | |
2364 | { | |
2365 | /* In an NSDMI build_base_path defers building conversions to virtual | |
2366 | bases, and we handle it here. */ | |
2367 | tree basetype = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (*t))); | |
9771b263 | 2368 | vec<tree, va_gc> *vbases = CLASSTYPE_VBASECLASSES (current_class_type); |
c65b0607 | 2369 | int i; tree binfo; |
9771b263 | 2370 | FOR_EACH_VEC_SAFE_ELT (vbases, i, binfo) |
c65b0607 JM |
2371 | if (BINFO_TYPE (binfo) == basetype) |
2372 | break; | |
2373 | *t = build_base_path (PLUS_EXPR, TREE_OPERAND (*t, 0), binfo, true, | |
2374 | tf_warning_or_error); | |
2375 | } | |
b3ab27f3 MM |
2376 | |
2377 | return NULL_TREE; | |
2378 | } | |
9f63daea | 2379 | |
8dfaeb63 MM |
2380 | /* When we parse a default argument expression, we may create |
2381 | temporary variables via TARGET_EXPRs. When we actually use the | |
a4d25b44 JM |
2382 | default-argument expression, we make a copy of the expression |
2383 | and replace the temporaries with appropriate local versions. */ | |
e92cc029 | 2384 | |
878cd289 | 2385 | tree |
b57b79f7 | 2386 | break_out_target_exprs (tree t) |
878cd289 | 2387 | { |
8dfaeb63 MM |
2388 | static int target_remap_count; |
2389 | static splay_tree target_remap; | |
2390 | ||
b3ab27f3 | 2391 | if (!target_remap_count++) |
9f63daea EC |
2392 | target_remap = splay_tree_new (splay_tree_compare_pointers, |
2393 | /*splay_tree_delete_key_fn=*/NULL, | |
b3ab27f3 | 2394 | /*splay_tree_delete_value_fn=*/NULL); |
14588106 RG |
2395 | cp_walk_tree (&t, bot_manip, target_remap, NULL); |
2396 | cp_walk_tree (&t, bot_replace, target_remap, NULL); | |
b3ab27f3 MM |
2397 | |
2398 | if (!--target_remap_count) | |
2399 | { | |
2400 | splay_tree_delete (target_remap); | |
2401 | target_remap = NULL; | |
2402 | } | |
2403 | ||
2404 | return t; | |
878cd289 | 2405 | } |
f30432d7 | 2406 | |
8e1daa34 NS |
2407 | /* Similar to `build_nt', but for template definitions of dependent |
2408 | expressions */ | |
5566b478 MS |
2409 | |
2410 | tree | |
f330f599 | 2411 | build_min_nt_loc (location_t loc, enum tree_code code, ...) |
5566b478 | 2412 | { |
926ce8bd KH |
2413 | tree t; |
2414 | int length; | |
2415 | int i; | |
e34d07f2 | 2416 | va_list p; |
5566b478 | 2417 | |
5039610b SL |
2418 | gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp); |
2419 | ||
e34d07f2 | 2420 | va_start (p, code); |
5566b478 | 2421 | |
5566b478 | 2422 | t = make_node (code); |
f330f599 | 2423 | SET_EXPR_LOCATION (t, loc); |
8d5e6e25 | 2424 | length = TREE_CODE_LENGTH (code); |
5566b478 MS |
2425 | |
2426 | for (i = 0; i < length; i++) | |
2427 | { | |
2428 | tree x = va_arg (p, tree); | |
2a1e9fdd | 2429 | TREE_OPERAND (t, i) = x; |
5566b478 MS |
2430 | } |
2431 | ||
e34d07f2 | 2432 | va_end (p); |
5566b478 MS |
2433 | return t; |
2434 | } | |
2435 | ||
5039610b | 2436 | |
8e1daa34 | 2437 | /* Similar to `build', but for template definitions. */ |
5566b478 MS |
2438 | |
2439 | tree | |
e34d07f2 | 2440 | build_min (enum tree_code code, tree tt, ...) |
5566b478 | 2441 | { |
926ce8bd KH |
2442 | tree t; |
2443 | int length; | |
2444 | int i; | |
e34d07f2 | 2445 | va_list p; |
5566b478 | 2446 | |
5039610b SL |
2447 | gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp); |
2448 | ||
e34d07f2 | 2449 | va_start (p, tt); |
5566b478 | 2450 | |
5566b478 | 2451 | t = make_node (code); |
8d5e6e25 | 2452 | length = TREE_CODE_LENGTH (code); |
2a1e9fdd | 2453 | TREE_TYPE (t) = tt; |
5566b478 MS |
2454 | |
2455 | for (i = 0; i < length; i++) | |
2456 | { | |
2457 | tree x = va_arg (p, tree); | |
2a1e9fdd | 2458 | TREE_OPERAND (t, i) = x; |
4f976745 | 2459 | if (x && !TYPE_P (x) && TREE_SIDE_EFFECTS (x)) |
8e1daa34 | 2460 | TREE_SIDE_EFFECTS (t) = 1; |
5566b478 MS |
2461 | } |
2462 | ||
e34d07f2 | 2463 | va_end (p); |
5566b478 MS |
2464 | return t; |
2465 | } | |
2466 | ||
8e1daa34 NS |
2467 | /* Similar to `build', but for template definitions of non-dependent |
2468 | expressions. NON_DEP is the non-dependent expression that has been | |
2469 | built. */ | |
2470 | ||
2471 | tree | |
2472 | build_min_non_dep (enum tree_code code, tree non_dep, ...) | |
2473 | { | |
926ce8bd KH |
2474 | tree t; |
2475 | int length; | |
2476 | int i; | |
8e1daa34 NS |
2477 | va_list p; |
2478 | ||
5039610b SL |
2479 | gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp); |
2480 | ||
8e1daa34 NS |
2481 | va_start (p, non_dep); |
2482 | ||
e87b4dde JM |
2483 | if (REFERENCE_REF_P (non_dep)) |
2484 | non_dep = TREE_OPERAND (non_dep, 0); | |
2485 | ||
8e1daa34 NS |
2486 | t = make_node (code); |
2487 | length = TREE_CODE_LENGTH (code); | |
2488 | TREE_TYPE (t) = TREE_TYPE (non_dep); | |
8e1daa34 NS |
2489 | TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (non_dep); |
2490 | ||
2491 | for (i = 0; i < length; i++) | |
2492 | { | |
2493 | tree x = va_arg (p, tree); | |
2494 | TREE_OPERAND (t, i) = x; | |
2495 | } | |
2496 | ||
2497 | if (code == COMPOUND_EXPR && TREE_CODE (non_dep) != COMPOUND_EXPR) | |
2498 | /* This should not be considered a COMPOUND_EXPR, because it | |
04c06002 | 2499 | resolves to an overload. */ |
8e1daa34 | 2500 | COMPOUND_EXPR_OVERLOADED (t) = 1; |
9f63daea | 2501 | |
8e1daa34 | 2502 | va_end (p); |
e87b4dde | 2503 | return convert_from_reference (t); |
8e1daa34 NS |
2504 | } |
2505 | ||
3fcb9d1b NF |
2506 | /* Similar to `build_nt_call_vec', but for template definitions of |
2507 | non-dependent expressions. NON_DEP is the non-dependent expression | |
2508 | that has been built. */ | |
5039610b SL |
2509 | |
2510 | tree | |
9771b263 | 2511 | build_min_non_dep_call_vec (tree non_dep, tree fn, vec<tree, va_gc> *argvec) |
5039610b | 2512 | { |
c166b898 | 2513 | tree t = build_nt_call_vec (fn, argvec); |
e87b4dde JM |
2514 | if (REFERENCE_REF_P (non_dep)) |
2515 | non_dep = TREE_OPERAND (non_dep, 0); | |
5039610b SL |
2516 | TREE_TYPE (t) = TREE_TYPE (non_dep); |
2517 | TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (non_dep); | |
e87b4dde | 2518 | return convert_from_reference (t); |
5039610b SL |
2519 | } |
2520 | ||
5566b478 | 2521 | tree |
b57b79f7 | 2522 | get_type_decl (tree t) |
5566b478 | 2523 | { |
5566b478 MS |
2524 | if (TREE_CODE (t) == TYPE_DECL) |
2525 | return t; | |
2f939d94 | 2526 | if (TYPE_P (t)) |
5566b478 | 2527 | return TYPE_STUB_DECL (t); |
315fb5db NS |
2528 | gcc_assert (t == error_mark_node); |
2529 | return t; | |
5566b478 MS |
2530 | } |
2531 | ||
700466c2 JM |
2532 | /* Returns the namespace that contains DECL, whether directly or |
2533 | indirectly. */ | |
2534 | ||
2535 | tree | |
b57b79f7 | 2536 | decl_namespace_context (tree decl) |
700466c2 JM |
2537 | { |
2538 | while (1) | |
2539 | { | |
2540 | if (TREE_CODE (decl) == NAMESPACE_DECL) | |
2541 | return decl; | |
2542 | else if (TYPE_P (decl)) | |
2543 | decl = CP_DECL_CONTEXT (TYPE_MAIN_DECL (decl)); | |
2544 | else | |
2545 | decl = CP_DECL_CONTEXT (decl); | |
2546 | } | |
2547 | } | |
2548 | ||
b9e75696 JM |
2549 | /* Returns true if decl is within an anonymous namespace, however deeply |
2550 | nested, or false otherwise. */ | |
2551 | ||
2552 | bool | |
58f9752a | 2553 | decl_anon_ns_mem_p (const_tree decl) |
b9e75696 JM |
2554 | { |
2555 | while (1) | |
2556 | { | |
653109bd | 2557 | if (decl == NULL_TREE || decl == error_mark_node) |
b9e75696 JM |
2558 | return false; |
2559 | if (TREE_CODE (decl) == NAMESPACE_DECL | |
2560 | && DECL_NAME (decl) == NULL_TREE) | |
2561 | return true; | |
2562 | /* Classes and namespaces inside anonymous namespaces have | |
2563 | TREE_PUBLIC == 0, so we can shortcut the search. */ | |
2564 | else if (TYPE_P (decl)) | |
82f2836c | 2565 | return (TREE_PUBLIC (TYPE_MAIN_DECL (decl)) == 0); |
b9e75696 JM |
2566 | else if (TREE_CODE (decl) == NAMESPACE_DECL) |
2567 | return (TREE_PUBLIC (decl) == 0); | |
2568 | else | |
2569 | decl = DECL_CONTEXT (decl); | |
2570 | } | |
2571 | } | |
2572 | ||
c873934c JM |
2573 | /* Subroutine of cp_tree_equal: t1 and t2 are the CALL_EXPR_FNs of two |
2574 | CALL_EXPRS. Return whether they are equivalent. */ | |
2575 | ||
2576 | static bool | |
2577 | called_fns_equal (tree t1, tree t2) | |
2578 | { | |
2579 | /* Core 1321: dependent names are equivalent even if the overload sets | |
2580 | are different. But do compare explicit template arguments. */ | |
2581 | tree name1 = dependent_name (t1); | |
2582 | tree name2 = dependent_name (t2); | |
2583 | if (name1 || name2) | |
2584 | { | |
2585 | tree targs1 = NULL_TREE, targs2 = NULL_TREE; | |
2586 | ||
2587 | if (name1 != name2) | |
2588 | return false; | |
2589 | ||
2590 | if (TREE_CODE (t1) == TEMPLATE_ID_EXPR) | |
2591 | targs1 = TREE_OPERAND (t1, 1); | |
2592 | if (TREE_CODE (t2) == TEMPLATE_ID_EXPR) | |
2593 | targs2 = TREE_OPERAND (t2, 1); | |
2594 | return cp_tree_equal (targs1, targs2); | |
2595 | } | |
2596 | else | |
2597 | return cp_tree_equal (t1, t2); | |
2598 | } | |
2599 | ||
67d743fe | 2600 | /* Return truthvalue of whether T1 is the same tree structure as T2. |
c8a209ca | 2601 | Return 1 if they are the same. Return 0 if they are different. */ |
67d743fe | 2602 | |
c8a209ca | 2603 | bool |
b57b79f7 | 2604 | cp_tree_equal (tree t1, tree t2) |
67d743fe | 2605 | { |
926ce8bd | 2606 | enum tree_code code1, code2; |
67d743fe MS |
2607 | |
2608 | if (t1 == t2) | |
c8a209ca NS |
2609 | return true; |
2610 | if (!t1 || !t2) | |
2611 | return false; | |
2612 | ||
2613 | for (code1 = TREE_CODE (t1); | |
1a87cf0c | 2614 | CONVERT_EXPR_CODE_P (code1) |
c8a209ca NS |
2615 | || code1 == NON_LVALUE_EXPR; |
2616 | code1 = TREE_CODE (t1)) | |
2617 | t1 = TREE_OPERAND (t1, 0); | |
2618 | for (code2 = TREE_CODE (t2); | |
1a87cf0c | 2619 | CONVERT_EXPR_CODE_P (code2) |
b722c9a2 | 2620 | || code2 == NON_LVALUE_EXPR; |
c8a209ca NS |
2621 | code2 = TREE_CODE (t2)) |
2622 | t2 = TREE_OPERAND (t2, 0); | |
2623 | ||
2624 | /* They might have become equal now. */ | |
2625 | if (t1 == t2) | |
2626 | return true; | |
9f63daea | 2627 | |
67d743fe | 2628 | if (code1 != code2) |
c8a209ca | 2629 | return false; |
67d743fe MS |
2630 | |
2631 | switch (code1) | |
2632 | { | |
632f2871 RS |
2633 | case VOID_CST: |
2634 | /* There's only a single VOID_CST node, so we should never reach | |
2635 | here. */ | |
2636 | gcc_unreachable (); | |
2637 | ||
67d743fe | 2638 | case INTEGER_CST: |
807e902e | 2639 | return tree_int_cst_equal (t1, t2); |
67d743fe MS |
2640 | |
2641 | case REAL_CST: | |
2642 | return REAL_VALUES_EQUAL (TREE_REAL_CST (t1), TREE_REAL_CST (t2)); | |
2643 | ||
2644 | case STRING_CST: | |
2645 | return TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2) | |
da61dec9 | 2646 | && !memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2), |
c8a209ca | 2647 | TREE_STRING_LENGTH (t1)); |
67d743fe | 2648 | |
d05739f8 JM |
2649 | case FIXED_CST: |
2650 | return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1), | |
2651 | TREE_FIXED_CST (t2)); | |
2652 | ||
2a2193e0 SM |
2653 | case COMPLEX_CST: |
2654 | return cp_tree_equal (TREE_REALPART (t1), TREE_REALPART (t2)) | |
2655 | && cp_tree_equal (TREE_IMAGPART (t1), TREE_IMAGPART (t2)); | |
2656 | ||
4eab75dd MG |
2657 | case VECTOR_CST: |
2658 | return operand_equal_p (t1, t2, OEP_ONLY_CONST); | |
2659 | ||
67d743fe | 2660 | case CONSTRUCTOR: |
7dd4bdf5 MM |
2661 | /* We need to do this when determining whether or not two |
2662 | non-type pointer to member function template arguments | |
2663 | are the same. */ | |
31d06664 JM |
2664 | if (!same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)) |
2665 | || CONSTRUCTOR_NELTS (t1) != CONSTRUCTOR_NELTS (t2)) | |
c8a209ca | 2666 | return false; |
31d06664 JM |
2667 | { |
2668 | tree field, value; | |
2669 | unsigned int i; | |
2670 | FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t1), i, field, value) | |
2671 | { | |
2672 | constructor_elt *elt2 = CONSTRUCTOR_ELT (t2, i); | |
2673 | if (!cp_tree_equal (field, elt2->index) | |
2674 | || !cp_tree_equal (value, elt2->value)) | |
2675 | return false; | |
2676 | } | |
2677 | } | |
2678 | return true; | |
7dd4bdf5 MM |
2679 | |
2680 | case TREE_LIST: | |
c8a209ca NS |
2681 | if (!cp_tree_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2))) |
2682 | return false; | |
2683 | if (!cp_tree_equal (TREE_VALUE (t1), TREE_VALUE (t2))) | |
2684 | return false; | |
7dd4bdf5 | 2685 | return cp_tree_equal (TREE_CHAIN (t1), TREE_CHAIN (t2)); |
67d743fe MS |
2686 | |
2687 | case SAVE_EXPR: | |
2688 | return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); | |
2689 | ||
2690 | case CALL_EXPR: | |
5039610b SL |
2691 | { |
2692 | tree arg1, arg2; | |
2693 | call_expr_arg_iterator iter1, iter2; | |
c873934c | 2694 | if (!called_fns_equal (CALL_EXPR_FN (t1), CALL_EXPR_FN (t2))) |
5039610b SL |
2695 | return false; |
2696 | for (arg1 = first_call_expr_arg (t1, &iter1), | |
2697 | arg2 = first_call_expr_arg (t2, &iter2); | |
2698 | arg1 && arg2; | |
2699 | arg1 = next_call_expr_arg (&iter1), | |
2700 | arg2 = next_call_expr_arg (&iter2)) | |
2701 | if (!cp_tree_equal (arg1, arg2)) | |
2702 | return false; | |
96b4a0b5 JM |
2703 | if (arg1 || arg2) |
2704 | return false; | |
2705 | return true; | |
5039610b | 2706 | } |
67d743fe | 2707 | |
c8a209ca NS |
2708 | case TARGET_EXPR: |
2709 | { | |
2710 | tree o1 = TREE_OPERAND (t1, 0); | |
2711 | tree o2 = TREE_OPERAND (t2, 0); | |
9f63daea | 2712 | |
c8a209ca NS |
2713 | /* Special case: if either target is an unallocated VAR_DECL, |
2714 | it means that it's going to be unified with whatever the | |
2715 | TARGET_EXPR is really supposed to initialize, so treat it | |
2716 | as being equivalent to anything. */ | |
5a6ccc94 | 2717 | if (VAR_P (o1) && DECL_NAME (o1) == NULL_TREE |
c8a209ca NS |
2718 | && !DECL_RTL_SET_P (o1)) |
2719 | /*Nop*/; | |
5a6ccc94 | 2720 | else if (VAR_P (o2) && DECL_NAME (o2) == NULL_TREE |
c8a209ca NS |
2721 | && !DECL_RTL_SET_P (o2)) |
2722 | /*Nop*/; | |
2723 | else if (!cp_tree_equal (o1, o2)) | |
2724 | return false; | |
9f63daea | 2725 | |
c8a209ca NS |
2726 | return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)); |
2727 | } | |
9f63daea | 2728 | |
67d743fe | 2729 | case WITH_CLEANUP_EXPR: |
c8a209ca NS |
2730 | if (!cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))) |
2731 | return false; | |
6ad7895a | 2732 | return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t1, 1)); |
67d743fe MS |
2733 | |
2734 | case COMPONENT_REF: | |
c8a209ca NS |
2735 | if (TREE_OPERAND (t1, 1) != TREE_OPERAND (t2, 1)) |
2736 | return false; | |
2737 | return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); | |
67d743fe | 2738 | |
67d743fe | 2739 | case PARM_DECL: |
a77f94e2 | 2740 | /* For comparing uses of parameters in late-specified return types |
e7dc5734 JM |
2741 | with an out-of-class definition of the function, but can also come |
2742 | up for expressions that involve 'this' in a member function | |
2743 | template. */ | |
25976b7f JM |
2744 | |
2745 | if (comparing_specializations) | |
2746 | /* When comparing hash table entries, only an exact match is | |
2747 | good enough; we don't want to replace 'this' with the | |
2748 | version from another function. */ | |
2749 | return false; | |
2750 | ||
e7dc5734 JM |
2751 | if (same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))) |
2752 | { | |
2753 | if (DECL_ARTIFICIAL (t1) ^ DECL_ARTIFICIAL (t2)) | |
2754 | return false; | |
2755 | if (DECL_ARTIFICIAL (t1) | |
2756 | || (DECL_PARM_LEVEL (t1) == DECL_PARM_LEVEL (t2) | |
2757 | && DECL_PARM_INDEX (t1) == DECL_PARM_INDEX (t2))) | |
2758 | return true; | |
2759 | } | |
2760 | return false; | |
a77f94e2 JM |
2761 | |
2762 | case VAR_DECL: | |
67d743fe | 2763 | case CONST_DECL: |
9b2770f2 | 2764 | case FIELD_DECL: |
67d743fe | 2765 | case FUNCTION_DECL: |
c8a209ca NS |
2766 | case TEMPLATE_DECL: |
2767 | case IDENTIFIER_NODE: | |
47c0c7d7 | 2768 | case SSA_NAME: |
c8a209ca | 2769 | return false; |
67d743fe | 2770 | |
17a27b4f MM |
2771 | case BASELINK: |
2772 | return (BASELINK_BINFO (t1) == BASELINK_BINFO (t2) | |
2773 | && BASELINK_ACCESS_BINFO (t1) == BASELINK_ACCESS_BINFO (t2) | |
4643a68e | 2774 | && BASELINK_QUALIFIED_P (t1) == BASELINK_QUALIFIED_P (t2) |
17a27b4f MM |
2775 | && cp_tree_equal (BASELINK_FUNCTIONS (t1), |
2776 | BASELINK_FUNCTIONS (t2))); | |
2777 | ||
f84b4be9 | 2778 | case TEMPLATE_PARM_INDEX: |
31758337 NS |
2779 | return (TEMPLATE_PARM_IDX (t1) == TEMPLATE_PARM_IDX (t2) |
2780 | && TEMPLATE_PARM_LEVEL (t1) == TEMPLATE_PARM_LEVEL (t2) | |
9524f710 LE |
2781 | && (TEMPLATE_PARM_PARAMETER_PACK (t1) |
2782 | == TEMPLATE_PARM_PARAMETER_PACK (t2)) | |
31758337 NS |
2783 | && same_type_p (TREE_TYPE (TEMPLATE_PARM_DECL (t1)), |
2784 | TREE_TYPE (TEMPLATE_PARM_DECL (t2)))); | |
67d743fe | 2785 | |
bf12d54d | 2786 | case TEMPLATE_ID_EXPR: |
c873934c JM |
2787 | return (cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)) |
2788 | && cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1))); | |
2789 | ||
2790 | case TREE_VEC: | |
bf12d54d NS |
2791 | { |
2792 | unsigned ix; | |
c873934c | 2793 | if (TREE_VEC_LENGTH (t1) != TREE_VEC_LENGTH (t2)) |
bf12d54d | 2794 | return false; |
c873934c JM |
2795 | for (ix = TREE_VEC_LENGTH (t1); ix--;) |
2796 | if (!cp_tree_equal (TREE_VEC_ELT (t1, ix), | |
2797 | TREE_VEC_ELT (t2, ix))) | |
bf12d54d | 2798 | return false; |
bf12d54d NS |
2799 | return true; |
2800 | } | |
9f63daea | 2801 | |
67d743fe | 2802 | case SIZEOF_EXPR: |
abff8e06 | 2803 | case ALIGNOF_EXPR: |
c8a209ca NS |
2804 | { |
2805 | tree o1 = TREE_OPERAND (t1, 0); | |
2806 | tree o2 = TREE_OPERAND (t2, 0); | |
9f63daea | 2807 | |
ba29e5c2 JJ |
2808 | if (code1 == SIZEOF_EXPR) |
2809 | { | |
2810 | if (SIZEOF_EXPR_TYPE_P (t1)) | |
2811 | o1 = TREE_TYPE (o1); | |
2812 | if (SIZEOF_EXPR_TYPE_P (t2)) | |
2813 | o2 = TREE_TYPE (o2); | |
2814 | } | |
c8a209ca NS |
2815 | if (TREE_CODE (o1) != TREE_CODE (o2)) |
2816 | return false; | |
2817 | if (TYPE_P (o1)) | |
2818 | return same_type_p (o1, o2); | |
2819 | else | |
2820 | return cp_tree_equal (o1, o2); | |
2821 | } | |
9f63daea | 2822 | |
6f9f76e3 SM |
2823 | case MODOP_EXPR: |
2824 | { | |
2825 | tree t1_op1, t2_op1; | |
2826 | ||
2827 | if (!cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))) | |
2828 | return false; | |
2829 | ||
2830 | t1_op1 = TREE_OPERAND (t1, 1); | |
2831 | t2_op1 = TREE_OPERAND (t2, 1); | |
2832 | if (TREE_CODE (t1_op1) != TREE_CODE (t2_op1)) | |
2833 | return false; | |
2834 | ||
2835 | return cp_tree_equal (TREE_OPERAND (t1, 2), TREE_OPERAND (t2, 2)); | |
2836 | } | |
2837 | ||
61a127b3 MM |
2838 | case PTRMEM_CST: |
2839 | /* Two pointer-to-members are the same if they point to the same | |
2840 | field or function in the same class. */ | |
c8a209ca NS |
2841 | if (PTRMEM_CST_MEMBER (t1) != PTRMEM_CST_MEMBER (t2)) |
2842 | return false; | |
2843 | ||
2844 | return same_type_p (PTRMEM_CST_CLASS (t1), PTRMEM_CST_CLASS (t2)); | |
61a127b3 | 2845 | |
943e3ede MM |
2846 | case OVERLOAD: |
2847 | if (OVL_FUNCTION (t1) != OVL_FUNCTION (t2)) | |
2848 | return false; | |
2849 | return cp_tree_equal (OVL_CHAIN (t1), OVL_CHAIN (t2)); | |
2850 | ||
ea798d0f PC |
2851 | case TRAIT_EXPR: |
2852 | if (TRAIT_EXPR_KIND (t1) != TRAIT_EXPR_KIND (t2)) | |
2853 | return false; | |
2854 | return same_type_p (TRAIT_EXPR_TYPE1 (t1), TRAIT_EXPR_TYPE1 (t2)) | |
2855 | && same_type_p (TRAIT_EXPR_TYPE2 (t1), TRAIT_EXPR_TYPE2 (t2)); | |
2856 | ||
ab73eba8 JM |
2857 | case CAST_EXPR: |
2858 | case STATIC_CAST_EXPR: | |
2859 | case REINTERPRET_CAST_EXPR: | |
2860 | case CONST_CAST_EXPR: | |
2861 | case DYNAMIC_CAST_EXPR: | |
a4474a38 | 2862 | case IMPLICIT_CONV_EXPR: |
ab73eba8 JM |
2863 | case NEW_EXPR: |
2864 | if (!same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))) | |
2865 | return false; | |
2866 | /* Now compare operands as usual. */ | |
2867 | break; | |
2868 | ||
10261728 JM |
2869 | case DEFERRED_NOEXCEPT: |
2870 | return (cp_tree_equal (DEFERRED_NOEXCEPT_PATTERN (t1), | |
2871 | DEFERRED_NOEXCEPT_PATTERN (t2)) | |
2872 | && comp_template_args (DEFERRED_NOEXCEPT_ARGS (t1), | |
2873 | DEFERRED_NOEXCEPT_ARGS (t2))); | |
2874 | break; | |
2875 | ||
7f85441b KG |
2876 | default: |
2877 | break; | |
67d743fe MS |
2878 | } |
2879 | ||
2880 | switch (TREE_CODE_CLASS (code1)) | |
2881 | { | |
6615c446 JO |
2882 | case tcc_unary: |
2883 | case tcc_binary: | |
2884 | case tcc_comparison: | |
2885 | case tcc_expression: | |
5039610b | 2886 | case tcc_vl_exp: |
6615c446 JO |
2887 | case tcc_reference: |
2888 | case tcc_statement: | |
aa1826e2 | 2889 | { |
5039610b SL |
2890 | int i, n; |
2891 | ||
d26e5986 | 2892 | n = cp_tree_operand_length (t1); |
5039610b SL |
2893 | if (TREE_CODE_CLASS (code1) == tcc_vl_exp |
2894 | && n != TREE_OPERAND_LENGTH (t2)) | |
2895 | return false; | |
9f63daea | 2896 | |
5039610b | 2897 | for (i = 0; i < n; ++i) |
c8a209ca NS |
2898 | if (!cp_tree_equal (TREE_OPERAND (t1, i), TREE_OPERAND (t2, i))) |
2899 | return false; | |
9f63daea | 2900 | |
c8a209ca | 2901 | return true; |
aa1826e2 | 2902 | } |
9f63daea | 2903 | |
6615c446 | 2904 | case tcc_type: |
c8a209ca | 2905 | return same_type_p (t1, t2); |
6615c446 JO |
2906 | default: |
2907 | gcc_unreachable (); | |
67d743fe | 2908 | } |
6615c446 | 2909 | /* We can get here with --disable-checking. */ |
c8a209ca | 2910 | return false; |
67d743fe | 2911 | } |
73aad9b9 | 2912 | |
d11ad92e MS |
2913 | /* The type of ARG when used as an lvalue. */ |
2914 | ||
2915 | tree | |
b57b79f7 | 2916 | lvalue_type (tree arg) |
d11ad92e | 2917 | { |
2c73f9f5 | 2918 | tree type = TREE_TYPE (arg); |
8cd4c175 | 2919 | return type; |
d11ad92e MS |
2920 | } |
2921 | ||
2922 | /* The type of ARG for printing error messages; denote lvalues with | |
2923 | reference types. */ | |
2924 | ||
2925 | tree | |
b57b79f7 | 2926 | error_type (tree arg) |
d11ad92e MS |
2927 | { |
2928 | tree type = TREE_TYPE (arg); | |
9f63daea | 2929 | |
d11ad92e MS |
2930 | if (TREE_CODE (type) == ARRAY_TYPE) |
2931 | ; | |
08476342 NS |
2932 | else if (TREE_CODE (type) == ERROR_MARK) |
2933 | ; | |
d11ad92e MS |
2934 | else if (real_lvalue_p (arg)) |
2935 | type = build_reference_type (lvalue_type (arg)); | |
9e1e64ec | 2936 | else if (MAYBE_CLASS_TYPE_P (type)) |
d11ad92e MS |
2937 | type = lvalue_type (arg); |
2938 | ||
2939 | return type; | |
2940 | } | |
eb66be0e MS |
2941 | |
2942 | /* Does FUNCTION use a variable-length argument list? */ | |
2943 | ||
2944 | int | |
58f9752a | 2945 | varargs_function_p (const_tree function) |
eb66be0e | 2946 | { |
f38958e8 | 2947 | return stdarg_p (TREE_TYPE (function)); |
eb66be0e | 2948 | } |
f94ae2f5 JM |
2949 | |
2950 | /* Returns 1 if decl is a member of a class. */ | |
2951 | ||
2952 | int | |
58f9752a | 2953 | member_p (const_tree decl) |
f94ae2f5 | 2954 | { |
58f9752a | 2955 | const_tree const ctx = DECL_CONTEXT (decl); |
2f939d94 | 2956 | return (ctx && TYPE_P (ctx)); |
f94ae2f5 | 2957 | } |
51924768 JM |
2958 | |
2959 | /* Create a placeholder for member access where we don't actually have an | |
2960 | object that the access is against. */ | |
2961 | ||
2962 | tree | |
b57b79f7 | 2963 | build_dummy_object (tree type) |
51924768 | 2964 | { |
632f2871 | 2965 | tree decl = build1 (NOP_EXPR, build_pointer_type (type), void_node); |
dd865ef6 | 2966 | return cp_build_indirect_ref (decl, RO_NULL, tf_warning_or_error); |
51924768 JM |
2967 | } |
2968 | ||
2969 | /* We've gotten a reference to a member of TYPE. Return *this if appropriate, | |
2970 | or a dummy object otherwise. If BINFOP is non-0, it is filled with the | |
2971 | binfo path from current_class_type to TYPE, or 0. */ | |
2972 | ||
2973 | tree | |
b57b79f7 | 2974 | maybe_dummy_object (tree type, tree* binfop) |
51924768 JM |
2975 | { |
2976 | tree decl, context; | |
2db1ab2d | 2977 | tree binfo; |
a6846853 | 2978 | tree current = current_nonlambda_class_type (); |
9f63daea | 2979 | |
a6846853 | 2980 | if (current |
22854930 PC |
2981 | && (binfo = lookup_base (current, type, ba_any, NULL, |
2982 | tf_warning_or_error))) | |
a6846853 | 2983 | context = current; |
51924768 JM |
2984 | else |
2985 | { | |
2986 | /* Reference from a nested class member function. */ | |
2987 | context = type; | |
2db1ab2d | 2988 | binfo = TYPE_BINFO (type); |
51924768 JM |
2989 | } |
2990 | ||
2db1ab2d NS |
2991 | if (binfop) |
2992 | *binfop = binfo; | |
9f63daea | 2993 | |
41d04a8d JM |
2994 | if (current_class_ref |
2995 | /* current_class_ref might not correspond to current_class_type if | |
2996 | we're in tsubst_default_argument or a lambda-declarator; in either | |
2997 | case, we want to use current_class_ref if it matches CONTEXT. */ | |
2998 | && (same_type_ignoring_top_level_qualifiers_p | |
2999 | (TREE_TYPE (current_class_ref), context))) | |
51924768 JM |
3000 | decl = current_class_ref; |
3001 | else | |
3002 | decl = build_dummy_object (context); | |
3003 | ||
3004 | return decl; | |
3005 | } | |
3006 | ||
3007 | /* Returns 1 if OB is a placeholder object, or a pointer to one. */ | |
3008 | ||
3009 | int | |
58f9752a | 3010 | is_dummy_object (const_tree ob) |
51924768 | 3011 | { |
591cb3cf | 3012 | if (INDIRECT_REF_P (ob)) |
51924768 JM |
3013 | ob = TREE_OPERAND (ob, 0); |
3014 | return (TREE_CODE (ob) == NOP_EXPR | |
632f2871 | 3015 | && TREE_OPERAND (ob, 0) == void_node); |
51924768 | 3016 | } |
5524676d | 3017 | |
c32097d8 JM |
3018 | /* Returns 1 iff type T is something we want to treat as a scalar type for |
3019 | the purpose of deciding whether it is trivial/POD/standard-layout. */ | |
3020 | ||
11f35925 | 3021 | bool |
c32097d8 JM |
3022 | scalarish_type_p (const_tree t) |
3023 | { | |
3024 | if (t == error_mark_node) | |
3025 | return 1; | |
3026 | ||
3027 | return (SCALAR_TYPE_P (t) | |
3028 | || TREE_CODE (t) == VECTOR_TYPE); | |
3029 | } | |
3030 | ||
3031 | /* Returns true iff T requires non-trivial default initialization. */ | |
3032 | ||
3033 | bool | |
3034 | type_has_nontrivial_default_init (const_tree t) | |
3035 | { | |
3036 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3037 | ||
3038 | if (CLASS_TYPE_P (t)) | |
3039 | return TYPE_HAS_COMPLEX_DFLT (t); | |
3040 | else | |
3041 | return 0; | |
3042 | } | |
3043 | ||
d758e847 JM |
3044 | /* Returns true iff copying an object of type T (including via move |
3045 | constructor) is non-trivial. That is, T has no non-trivial copy | |
3046 | constructors and no non-trivial move constructors. */ | |
c32097d8 JM |
3047 | |
3048 | bool | |
3049 | type_has_nontrivial_copy_init (const_tree t) | |
3050 | { | |
3051 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3052 | ||
3053 | if (CLASS_TYPE_P (t)) | |
d758e847 JM |
3054 | { |
3055 | gcc_assert (COMPLETE_TYPE_P (t)); | |
3056 | return ((TYPE_HAS_COPY_CTOR (t) | |
3057 | && TYPE_HAS_COMPLEX_COPY_CTOR (t)) | |
3058 | || TYPE_HAS_COMPLEX_MOVE_CTOR (t)); | |
3059 | } | |
c32097d8 JM |
3060 | else |
3061 | return 0; | |
3062 | } | |
3063 | ||
46408846 JM |
3064 | /* Returns 1 iff type T is a trivially copyable type, as defined in |
3065 | [basic.types] and [class]. */ | |
c32097d8 JM |
3066 | |
3067 | bool | |
46408846 | 3068 | trivially_copyable_p (const_tree t) |
c32097d8 JM |
3069 | { |
3070 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3071 | ||
3072 | if (CLASS_TYPE_P (t)) | |
d758e847 JM |
3073 | return ((!TYPE_HAS_COPY_CTOR (t) |
3074 | || !TYPE_HAS_COMPLEX_COPY_CTOR (t)) | |
3075 | && !TYPE_HAS_COMPLEX_MOVE_CTOR (t) | |
3076 | && (!TYPE_HAS_COPY_ASSIGN (t) | |
3077 | || !TYPE_HAS_COMPLEX_COPY_ASSIGN (t)) | |
3078 | && !TYPE_HAS_COMPLEX_MOVE_ASSIGN (t) | |
334738b4 | 3079 | && TYPE_HAS_TRIVIAL_DESTRUCTOR (t)); |
c32097d8 JM |
3080 | else |
3081 | return scalarish_type_p (t); | |
3082 | } | |
3083 | ||
46408846 JM |
3084 | /* Returns 1 iff type T is a trivial type, as defined in [basic.types] and |
3085 | [class]. */ | |
3086 | ||
3087 | bool | |
3088 | trivial_type_p (const_tree t) | |
3089 | { | |
3090 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3091 | ||
3092 | if (CLASS_TYPE_P (t)) | |
3093 | return (TYPE_HAS_TRIVIAL_DFLT (t) | |
3094 | && trivially_copyable_p (t)); | |
3095 | else | |
3096 | return scalarish_type_p (t); | |
3097 | } | |
3098 | ||
5524676d JM |
3099 | /* Returns 1 iff type T is a POD type, as defined in [basic.types]. */ |
3100 | ||
c32097d8 | 3101 | bool |
58f9752a | 3102 | pod_type_p (const_tree t) |
5524676d | 3103 | { |
4e9b57fa | 3104 | /* This CONST_CAST is okay because strip_array_types returns its |
75547801 | 3105 | argument unmodified and we assign it to a const_tree. */ |
b1d5455a | 3106 | t = strip_array_types (CONST_CAST_TREE(t)); |
5524676d | 3107 | |
cc72bbaa JM |
3108 | if (!CLASS_TYPE_P (t)) |
3109 | return scalarish_type_p (t); | |
3110 | else if (cxx_dialect > cxx98) | |
c32097d8 JM |
3111 | /* [class]/10: A POD struct is a class that is both a trivial class and a |
3112 | standard-layout class, and has no non-static data members of type | |
3113 | non-POD struct, non-POD union (or array of such types). | |
3114 | ||
3115 | We don't need to check individual members because if a member is | |
3116 | non-std-layout or non-trivial, the class will be too. */ | |
3117 | return (std_layout_type_p (t) && trivial_type_p (t)); | |
3118 | else | |
cc72bbaa JM |
3119 | /* The C++98 definition of POD is different. */ |
3120 | return !CLASSTYPE_NON_LAYOUT_POD_P (t); | |
c32097d8 JM |
3121 | } |
3122 | ||
3123 | /* Returns true iff T is POD for the purpose of layout, as defined in the | |
3124 | C++ ABI. */ | |
3125 | ||
3126 | bool | |
3127 | layout_pod_type_p (const_tree t) | |
3128 | { | |
3129 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3130 | ||
3131 | if (CLASS_TYPE_P (t)) | |
3132 | return !CLASSTYPE_NON_LAYOUT_POD_P (t); | |
3133 | else | |
3134 | return scalarish_type_p (t); | |
3135 | } | |
3136 | ||
3137 | /* Returns true iff T is a standard-layout type, as defined in | |
3138 | [basic.types]. */ | |
3139 | ||
3140 | bool | |
3141 | std_layout_type_p (const_tree t) | |
3142 | { | |
3143 | t = strip_array_types (CONST_CAST_TREE (t)); | |
3144 | ||
3145 | if (CLASS_TYPE_P (t)) | |
3146 | return !CLASSTYPE_NON_STD_LAYOUT (t); | |
3147 | else | |
3148 | return scalarish_type_p (t); | |
5524676d | 3149 | } |
e5dc5fb2 | 3150 | |
39ef6592 LC |
3151 | /* Nonzero iff type T is a class template implicit specialization. */ |
3152 | ||
3153 | bool | |
ac7d7749 | 3154 | class_tmpl_impl_spec_p (const_tree t) |
39ef6592 LC |
3155 | { |
3156 | return CLASS_TYPE_P (t) && CLASSTYPE_TEMPLATE_INSTANTIATION (t); | |
3157 | } | |
3158 | ||
94e6e4c4 AO |
3159 | /* Returns 1 iff zero initialization of type T means actually storing |
3160 | zeros in it. */ | |
3161 | ||
3162 | int | |
58f9752a | 3163 | zero_init_p (const_tree t) |
94e6e4c4 | 3164 | { |
4e9b57fa | 3165 | /* This CONST_CAST is okay because strip_array_types returns its |
75547801 | 3166 | argument unmodified and we assign it to a const_tree. */ |
b1d5455a | 3167 | t = strip_array_types (CONST_CAST_TREE(t)); |
94e6e4c4 | 3168 | |
17bbb839 MM |
3169 | if (t == error_mark_node) |
3170 | return 1; | |
3171 | ||
94e6e4c4 | 3172 | /* NULL pointers to data members are initialized with -1. */ |
66b1156a | 3173 | if (TYPE_PTRDATAMEM_P (t)) |
94e6e4c4 AO |
3174 | return 0; |
3175 | ||
3176 | /* Classes that contain types that can't be zero-initialized, cannot | |
3177 | be zero-initialized themselves. */ | |
3178 | if (CLASS_TYPE_P (t) && CLASSTYPE_NON_ZERO_INIT_P (t)) | |
3179 | return 0; | |
3180 | ||
3181 | return 1; | |
3182 | } | |
3183 | ||
91d231cb | 3184 | /* Table of valid C++ attributes. */ |
349ae713 | 3185 | const struct attribute_spec cxx_attribute_table[] = |
e5dc5fb2 | 3186 | { |
62d784f7 KT |
3187 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, |
3188 | affects_type_identity } */ | |
3189 | { "java_interface", 0, 0, false, false, false, | |
3190 | handle_java_interface_attribute, false }, | |
3191 | { "com_interface", 0, 0, false, false, false, | |
3192 | handle_com_interface_attribute, false }, | |
3193 | { "init_priority", 1, 1, true, false, false, | |
3194 | handle_init_priority_attribute, false }, | |
7dbb85a7 JM |
3195 | { "abi_tag", 1, -1, false, false, false, |
3196 | handle_abi_tag_attribute, true }, | |
62d784f7 | 3197 | { NULL, 0, 0, false, false, false, NULL, false } |
91d231cb JM |
3198 | }; |
3199 | ||
3200 | /* Handle a "java_interface" attribute; arguments as in | |
3201 | struct attribute_spec.handler. */ | |
3202 | static tree | |
9f63daea | 3203 | handle_java_interface_attribute (tree* node, |
0cbd7506 | 3204 | tree name, |
12308bc6 | 3205 | tree /*args*/, |
0cbd7506 MS |
3206 | int flags, |
3207 | bool* no_add_attrs) | |
91d231cb JM |
3208 | { |
3209 | if (DECL_P (*node) | |
3210 | || !CLASS_TYPE_P (*node) | |
3211 | || !TYPE_FOR_JAVA (*node)) | |
60c87482 | 3212 | { |
a82e1a7d | 3213 | error ("%qE attribute can only be applied to Java class definitions", |
4460cef2 | 3214 | name); |
91d231cb JM |
3215 | *no_add_attrs = true; |
3216 | return NULL_TREE; | |
60c87482 | 3217 | } |
91d231cb | 3218 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
8dd16ecc | 3219 | *node = build_variant_type_copy (*node); |
91d231cb | 3220 | TYPE_JAVA_INTERFACE (*node) = 1; |
e5dc5fb2 | 3221 | |
91d231cb JM |
3222 | return NULL_TREE; |
3223 | } | |
3224 | ||
3225 | /* Handle a "com_interface" attribute; arguments as in | |
3226 | struct attribute_spec.handler. */ | |
3227 | static tree | |
9f63daea | 3228 | handle_com_interface_attribute (tree* node, |
0cbd7506 | 3229 | tree name, |
12308bc6 PC |
3230 | tree /*args*/, |
3231 | int /*flags*/, | |
0cbd7506 | 3232 | bool* no_add_attrs) |
91d231cb JM |
3233 | { |
3234 | static int warned; | |
3235 | ||
3236 | *no_add_attrs = true; | |
3237 | ||
3238 | if (DECL_P (*node) | |
3239 | || !CLASS_TYPE_P (*node) | |
3240 | || *node != TYPE_MAIN_VARIANT (*node)) | |
e5dc5fb2 | 3241 | { |
5c498b10 DD |
3242 | warning (OPT_Wattributes, "%qE attribute can only be applied " |
3243 | "to class definitions", name); | |
91d231cb JM |
3244 | return NULL_TREE; |
3245 | } | |
e5dc5fb2 | 3246 | |
91d231cb | 3247 | if (!warned++) |
d4ee4d25 | 3248 | warning (0, "%qE is obsolete; g++ vtables are now COM-compatible by default", |
4460cef2 | 3249 | name); |
91d231cb JM |
3250 | |
3251 | return NULL_TREE; | |
3252 | } | |
3253 | ||
3254 | /* Handle an "init_priority" attribute; arguments as in | |
3255 | struct attribute_spec.handler. */ | |
3256 | static tree | |
9f63daea | 3257 | handle_init_priority_attribute (tree* node, |
0cbd7506 MS |
3258 | tree name, |
3259 | tree args, | |
12308bc6 | 3260 | int /*flags*/, |
0cbd7506 | 3261 | bool* no_add_attrs) |
91d231cb JM |
3262 | { |
3263 | tree initp_expr = TREE_VALUE (args); | |
3264 | tree decl = *node; | |
3265 | tree type = TREE_TYPE (decl); | |
3266 | int pri; | |
3267 | ||
3268 | STRIP_NOPS (initp_expr); | |
5d77fb19 | 3269 | initp_expr = default_conversion (initp_expr); |
9f63daea | 3270 | |
91d231cb JM |
3271 | if (!initp_expr || TREE_CODE (initp_expr) != INTEGER_CST) |
3272 | { | |
3273 | error ("requested init_priority is not an integer constant"); | |
3274 | *no_add_attrs = true; | |
3275 | return NULL_TREE; | |
3276 | } | |
e5dc5fb2 | 3277 | |
91d231cb | 3278 | pri = TREE_INT_CST_LOW (initp_expr); |
9f63daea | 3279 | |
91d231cb JM |
3280 | type = strip_array_types (type); |
3281 | ||
3282 | if (decl == NULL_TREE | |
5a6ccc94 | 3283 | || !VAR_P (decl) |
91d231cb JM |
3284 | || !TREE_STATIC (decl) |
3285 | || DECL_EXTERNAL (decl) | |
3286 | || (TREE_CODE (type) != RECORD_TYPE | |
3287 | && TREE_CODE (type) != UNION_TYPE) | |
3288 | /* Static objects in functions are initialized the | |
3289 | first time control passes through that | |
3290 | function. This is not precise enough to pin down an | |
c6002625 | 3291 | init_priority value, so don't allow it. */ |
9f63daea | 3292 | || current_function_decl) |
91d231cb | 3293 | { |
a82e1a7d | 3294 | error ("can only use %qE attribute on file-scope definitions " |
0cbd7506 | 3295 | "of objects of class type", name); |
91d231cb JM |
3296 | *no_add_attrs = true; |
3297 | return NULL_TREE; | |
3298 | } | |
e5dc5fb2 | 3299 | |
91d231cb JM |
3300 | if (pri > MAX_INIT_PRIORITY || pri <= 0) |
3301 | { | |
3302 | error ("requested init_priority is out of range"); | |
3303 | *no_add_attrs = true; | |
3304 | return NULL_TREE; | |
3305 | } | |
e5dc5fb2 | 3306 | |
91d231cb JM |
3307 | /* Check for init_priorities that are reserved for |
3308 | language and runtime support implementations.*/ | |
3309 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
3310 | { | |
9f63daea | 3311 | warning |
d4ee4d25 | 3312 | (0, "requested init_priority is reserved for internal use"); |
e5dc5fb2 JM |
3313 | } |
3314 | ||
91d231cb JM |
3315 | if (SUPPORTS_INIT_PRIORITY) |
3316 | { | |
820cc88f DB |
3317 | SET_DECL_INIT_PRIORITY (decl, pri); |
3318 | DECL_HAS_INIT_PRIORITY_P (decl) = 1; | |
91d231cb JM |
3319 | return NULL_TREE; |
3320 | } | |
3321 | else | |
3322 | { | |
a82e1a7d | 3323 | error ("%qE attribute is not supported on this platform", name); |
91d231cb JM |
3324 | *no_add_attrs = true; |
3325 | return NULL_TREE; | |
3326 | } | |
e5dc5fb2 | 3327 | } |
87533b37 | 3328 | |
7dbb85a7 JM |
3329 | /* DECL is being redeclared; the old declaration had the abi tags in OLD, |
3330 | and the new one has the tags in NEW_. Give an error if there are tags | |
3331 | in NEW_ that weren't in OLD. */ | |
3332 | ||
3333 | bool | |
3334 | check_abi_tag_redeclaration (const_tree decl, const_tree old, const_tree new_) | |
3335 | { | |
3336 | if (old && TREE_CODE (TREE_VALUE (old)) == TREE_LIST) | |
3337 | old = TREE_VALUE (old); | |
3338 | if (new_ && TREE_CODE (TREE_VALUE (new_)) == TREE_LIST) | |
3339 | new_ = TREE_VALUE (new_); | |
3340 | bool err = false; | |
3341 | for (const_tree t = new_; t; t = TREE_CHAIN (t)) | |
3342 | { | |
3343 | tree str = TREE_VALUE (t); | |
3344 | for (const_tree in = old; in; in = TREE_CHAIN (in)) | |
3345 | { | |
3346 | tree ostr = TREE_VALUE (in); | |
3347 | if (cp_tree_equal (str, ostr)) | |
3348 | goto found; | |
3349 | } | |
3350 | error ("redeclaration of %qD adds abi tag %E", decl, str); | |
3351 | err = true; | |
3352 | found:; | |
3353 | } | |
3354 | if (err) | |
3355 | { | |
3356 | inform (DECL_SOURCE_LOCATION (decl), "previous declaration here"); | |
3357 | return false; | |
3358 | } | |
3359 | return true; | |
3360 | } | |
3361 | ||
3362 | /* Handle an "abi_tag" attribute; arguments as in | |
3363 | struct attribute_spec.handler. */ | |
3364 | ||
3365 | static tree | |
3366 | handle_abi_tag_attribute (tree* node, tree name, tree args, | |
3367 | int flags, bool* no_add_attrs) | |
3368 | { | |
3369 | if (TYPE_P (*node)) | |
3370 | { | |
73243d63 | 3371 | if (!OVERLOAD_TYPE_P (*node)) |
7dbb85a7 JM |
3372 | { |
3373 | error ("%qE attribute applied to non-class, non-enum type %qT", | |
3374 | name, *node); | |
3375 | goto fail; | |
3376 | } | |
3377 | else if (!(flags & (int)ATTR_FLAG_TYPE_IN_PLACE)) | |
3378 | { | |
3379 | error ("%qE attribute applied to %qT after its definition", | |
3380 | name, *node); | |
3381 | goto fail; | |
3382 | } | |
2982147e JM |
3383 | else if (CLASSTYPE_TEMPLATE_INSTANTIATION (*node)) |
3384 | { | |
3385 | warning (OPT_Wattributes, "ignoring %qE attribute applied to " | |
3386 | "template instantiation %qT", name, *node); | |
3387 | goto fail; | |
3388 | } | |
3389 | else if (CLASSTYPE_TEMPLATE_SPECIALIZATION (*node)) | |
3390 | { | |
3391 | warning (OPT_Wattributes, "ignoring %qE attribute applied to " | |
3392 | "template specialization %qT", name, *node); | |
3393 | goto fail; | |
3394 | } | |
7dbb85a7 JM |
3395 | |
3396 | tree attributes = TYPE_ATTRIBUTES (*node); | |
3397 | tree decl = TYPE_NAME (*node); | |
3398 | ||
3399 | /* Make sure all declarations have the same abi tags. */ | |
3400 | if (DECL_SOURCE_LOCATION (decl) != input_location) | |
3401 | { | |
3402 | if (!check_abi_tag_redeclaration (decl, | |
3403 | lookup_attribute ("abi_tag", | |
3404 | attributes), | |
3405 | args)) | |
3406 | goto fail; | |
3407 | } | |
3408 | } | |
3409 | else | |
3410 | { | |
3411 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
3412 | { | |
3413 | error ("%qE attribute applied to non-function %qD", name, *node); | |
3414 | goto fail; | |
3415 | } | |
3416 | else if (DECL_LANGUAGE (*node) == lang_c) | |
3417 | { | |
3418 | error ("%qE attribute applied to extern \"C\" function %qD", | |
3419 | name, *node); | |
3420 | goto fail; | |
3421 | } | |
3422 | } | |
3423 | ||
3424 | return NULL_TREE; | |
3425 | ||
3426 | fail: | |
3427 | *no_add_attrs = true; | |
3428 | return NULL_TREE; | |
3429 | } | |
3430 | ||
87533b37 MM |
3431 | /* Return a new PTRMEM_CST of the indicated TYPE. The MEMBER is the |
3432 | thing pointed to by the constant. */ | |
3433 | ||
3434 | tree | |
b57b79f7 | 3435 | make_ptrmem_cst (tree type, tree member) |
87533b37 MM |
3436 | { |
3437 | tree ptrmem_cst = make_node (PTRMEM_CST); | |
87533b37 MM |
3438 | TREE_TYPE (ptrmem_cst) = type; |
3439 | PTRMEM_CST_MEMBER (ptrmem_cst) = member; | |
3440 | return ptrmem_cst; | |
3441 | } | |
3442 | ||
e9525111 | 3443 | /* Build a variant of TYPE that has the indicated ATTRIBUTES. May |
51035976 | 3444 | return an existing type if an appropriate type already exists. */ |
e9525111 MM |
3445 | |
3446 | tree | |
3447 | cp_build_type_attribute_variant (tree type, tree attributes) | |
3448 | { | |
3449 | tree new_type; | |
3450 | ||
3451 | new_type = build_type_attribute_variant (type, attributes); | |
3a55fb4c JM |
3452 | if (TREE_CODE (new_type) == FUNCTION_TYPE |
3453 | || TREE_CODE (new_type) == METHOD_TYPE) | |
2eed8e37 BK |
3454 | { |
3455 | new_type = build_exception_variant (new_type, | |
3456 | TYPE_RAISES_EXCEPTIONS (type)); | |
3457 | new_type = build_ref_qualified_type (new_type, | |
3458 | type_memfn_rqual (type)); | |
3459 | } | |
8e30dcf3 JM |
3460 | |
3461 | /* Making a new main variant of a class type is broken. */ | |
3462 | gcc_assert (!CLASS_TYPE_P (type) || new_type == type); | |
3463 | ||
e9525111 MM |
3464 | return new_type; |
3465 | } | |
3466 | ||
2dff8956 JJ |
3467 | /* Return TRUE if TYPE1 and TYPE2 are identical for type hashing purposes. |
3468 | Called only after doing all language independent checks. Only | |
3469 | to check TYPE_RAISES_EXCEPTIONS for FUNCTION_TYPE, the rest is already | |
3470 | compared in type_hash_eq. */ | |
3471 | ||
3472 | bool | |
3473 | cxx_type_hash_eq (const_tree typea, const_tree typeb) | |
3474 | { | |
220e83ca KT |
3475 | gcc_assert (TREE_CODE (typea) == FUNCTION_TYPE |
3476 | || TREE_CODE (typea) == METHOD_TYPE); | |
2dff8956 JJ |
3477 | |
3478 | return comp_except_specs (TYPE_RAISES_EXCEPTIONS (typea), | |
3a55fb4c | 3479 | TYPE_RAISES_EXCEPTIONS (typeb), ce_exact); |
2dff8956 JJ |
3480 | } |
3481 | ||
25af8512 | 3482 | /* Apply FUNC to all language-specific sub-trees of TP in a pre-order |
350fae66 | 3483 | traversal. Called from walk_tree. */ |
25af8512 | 3484 | |
9f63daea | 3485 | tree |
350fae66 | 3486 | cp_walk_subtrees (tree *tp, int *walk_subtrees_p, walk_tree_fn func, |
0c58f841 | 3487 | void *data, struct pointer_set_t *pset) |
25af8512 AO |
3488 | { |
3489 | enum tree_code code = TREE_CODE (*tp); | |
3490 | tree result; | |
9f63daea | 3491 | |
25af8512 AO |
3492 | #define WALK_SUBTREE(NODE) \ |
3493 | do \ | |
3494 | { \ | |
14588106 | 3495 | result = cp_walk_tree (&(NODE), func, data, pset); \ |
6de9cd9a | 3496 | if (result) goto out; \ |
25af8512 AO |
3497 | } \ |
3498 | while (0) | |
3499 | ||
3500 | /* Not one of the easy cases. We must explicitly go through the | |
3501 | children. */ | |
6de9cd9a | 3502 | result = NULL_TREE; |
25af8512 AO |
3503 | switch (code) |
3504 | { | |
3505 | case DEFAULT_ARG: | |
3506 | case TEMPLATE_TEMPLATE_PARM: | |
3507 | case BOUND_TEMPLATE_TEMPLATE_PARM: | |
b8c6534b | 3508 | case UNBOUND_CLASS_TEMPLATE: |
25af8512 AO |
3509 | case TEMPLATE_PARM_INDEX: |
3510 | case TEMPLATE_TYPE_PARM: | |
3511 | case TYPENAME_TYPE: | |
3512 | case TYPEOF_TYPE: | |
a0d260fc | 3513 | case UNDERLYING_TYPE: |
da1d7781 | 3514 | /* None of these have subtrees other than those already walked |
0cbd7506 | 3515 | above. */ |
25af8512 AO |
3516 | *walk_subtrees_p = 0; |
3517 | break; | |
3518 | ||
5d80a306 DG |
3519 | case BASELINK: |
3520 | WALK_SUBTREE (BASELINK_FUNCTIONS (*tp)); | |
3521 | *walk_subtrees_p = 0; | |
3522 | break; | |
3523 | ||
25af8512 AO |
3524 | case PTRMEM_CST: |
3525 | WALK_SUBTREE (TREE_TYPE (*tp)); | |
3526 | *walk_subtrees_p = 0; | |
3527 | break; | |
3528 | ||
3529 | case TREE_LIST: | |
5dae1114 | 3530 | WALK_SUBTREE (TREE_PURPOSE (*tp)); |
25af8512 AO |
3531 | break; |
3532 | ||
3533 | case OVERLOAD: | |
3534 | WALK_SUBTREE (OVL_FUNCTION (*tp)); | |
3535 | WALK_SUBTREE (OVL_CHAIN (*tp)); | |
3536 | *walk_subtrees_p = 0; | |
4439d02f DG |
3537 | break; |
3538 | ||
3539 | case USING_DECL: | |
3540 | WALK_SUBTREE (DECL_NAME (*tp)); | |
3541 | WALK_SUBTREE (USING_DECL_SCOPE (*tp)); | |
3542 | WALK_SUBTREE (USING_DECL_DECLS (*tp)); | |
3543 | *walk_subtrees_p = 0; | |
25af8512 AO |
3544 | break; |
3545 | ||
3546 | case RECORD_TYPE: | |
3547 | if (TYPE_PTRMEMFUNC_P (*tp)) | |
3548 | WALK_SUBTREE (TYPE_PTRMEMFUNC_FN_TYPE (*tp)); | |
3549 | break; | |
3550 | ||
5d80a306 DG |
3551 | case TYPE_ARGUMENT_PACK: |
3552 | case NONTYPE_ARGUMENT_PACK: | |
3553 | { | |
3554 | tree args = ARGUMENT_PACK_ARGS (*tp); | |
3555 | int i, len = TREE_VEC_LENGTH (args); | |
3556 | for (i = 0; i < len; i++) | |
3557 | WALK_SUBTREE (TREE_VEC_ELT (args, i)); | |
3558 | } | |
3559 | break; | |
3560 | ||
3561 | case TYPE_PACK_EXPANSION: | |
3562 | WALK_SUBTREE (TREE_TYPE (*tp)); | |
c67dd256 | 3563 | WALK_SUBTREE (PACK_EXPANSION_EXTRA_ARGS (*tp)); |
5d80a306 DG |
3564 | *walk_subtrees_p = 0; |
3565 | break; | |
3566 | ||
3567 | case EXPR_PACK_EXPANSION: | |
3568 | WALK_SUBTREE (TREE_OPERAND (*tp, 0)); | |
c67dd256 | 3569 | WALK_SUBTREE (PACK_EXPANSION_EXTRA_ARGS (*tp)); |
5d80a306 DG |
3570 | *walk_subtrees_p = 0; |
3571 | break; | |
3572 | ||
3573 | case CAST_EXPR: | |
a7cbc517 JJ |
3574 | case REINTERPRET_CAST_EXPR: |
3575 | case STATIC_CAST_EXPR: | |
3576 | case CONST_CAST_EXPR: | |
3577 | case DYNAMIC_CAST_EXPR: | |
a4474a38 | 3578 | case IMPLICIT_CONV_EXPR: |
5d80a306 DG |
3579 | if (TREE_TYPE (*tp)) |
3580 | WALK_SUBTREE (TREE_TYPE (*tp)); | |
3581 | ||
3582 | { | |
3583 | int i; | |
3584 | for (i = 0; i < TREE_CODE_LENGTH (TREE_CODE (*tp)); ++i) | |
3585 | WALK_SUBTREE (TREE_OPERAND (*tp, i)); | |
3586 | } | |
3587 | *walk_subtrees_p = 0; | |
3588 | break; | |
3589 | ||
cb68ec50 PC |
3590 | case TRAIT_EXPR: |
3591 | WALK_SUBTREE (TRAIT_EXPR_TYPE1 (*tp)); | |
3592 | WALK_SUBTREE (TRAIT_EXPR_TYPE2 (*tp)); | |
3593 | *walk_subtrees_p = 0; | |
3594 | break; | |
3595 | ||
3ad6a8e1 DG |
3596 | case DECLTYPE_TYPE: |
3597 | WALK_SUBTREE (DECLTYPE_TYPE_EXPR (*tp)); | |
3598 | *walk_subtrees_p = 0; | |
3599 | break; | |
3600 | ||
3601 | ||
25af8512 | 3602 | default: |
350fae66 | 3603 | return NULL_TREE; |
25af8512 AO |
3604 | } |
3605 | ||
3606 | /* We didn't find what we were looking for. */ | |
6de9cd9a | 3607 | out: |
6de9cd9a | 3608 | return result; |
25af8512 AO |
3609 | |
3610 | #undef WALK_SUBTREE | |
3611 | } | |
3612 | ||
b655f214 MM |
3613 | /* Like save_expr, but for C++. */ |
3614 | ||
3615 | tree | |
3616 | cp_save_expr (tree expr) | |
3617 | { | |
3618 | /* There is no reason to create a SAVE_EXPR within a template; if | |
3619 | needed, we can create the SAVE_EXPR when instantiating the | |
3620 | template. Furthermore, the middle-end cannot handle C++-specific | |
3621 | tree codes. */ | |
3622 | if (processing_template_decl) | |
3623 | return expr; | |
3624 | return save_expr (expr); | |
3625 | } | |
3626 | ||
87e3dbc9 MM |
3627 | /* Initialize tree.c. */ |
3628 | ||
0a818f84 | 3629 | void |
b57b79f7 | 3630 | init_tree (void) |
0a818f84 | 3631 | { |
e2500fed | 3632 | list_hash_table = htab_create_ggc (31, list_hash, list_hash_eq, NULL); |
0a818f84 GRK |
3633 | } |
3634 | ||
872f37f9 | 3635 | /* Returns the kind of special function that DECL (a FUNCTION_DECL) |
50ad9642 MM |
3636 | is. Note that sfk_none is zero, so this function can be used as a |
3637 | predicate to test whether or not DECL is a special function. */ | |
872f37f9 MM |
3638 | |
3639 | special_function_kind | |
58f9752a | 3640 | special_function_p (const_tree decl) |
872f37f9 MM |
3641 | { |
3642 | /* Rather than doing all this stuff with magic names, we should | |
3643 | probably have a field of type `special_function_kind' in | |
3644 | DECL_LANG_SPECIFIC. */ | |
85b5d65a JM |
3645 | if (DECL_INHERITED_CTOR_BASE (decl)) |
3646 | return sfk_inheriting_constructor; | |
872f37f9 MM |
3647 | if (DECL_COPY_CONSTRUCTOR_P (decl)) |
3648 | return sfk_copy_constructor; | |
d5f4eddd JM |
3649 | if (DECL_MOVE_CONSTRUCTOR_P (decl)) |
3650 | return sfk_move_constructor; | |
872f37f9 MM |
3651 | if (DECL_CONSTRUCTOR_P (decl)) |
3652 | return sfk_constructor; | |
596ea4e5 | 3653 | if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR) |
ac177431 JM |
3654 | { |
3655 | if (copy_fn_p (decl)) | |
3656 | return sfk_copy_assignment; | |
3657 | if (move_fn_p (decl)) | |
3658 | return sfk_move_assignment; | |
3659 | } | |
872f37f9 MM |
3660 | if (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl)) |
3661 | return sfk_destructor; | |
3662 | if (DECL_COMPLETE_DESTRUCTOR_P (decl)) | |
3663 | return sfk_complete_destructor; | |
3664 | if (DECL_BASE_DESTRUCTOR_P (decl)) | |
3665 | return sfk_base_destructor; | |
3666 | if (DECL_DELETING_DESTRUCTOR_P (decl)) | |
3667 | return sfk_deleting_destructor; | |
3668 | if (DECL_CONV_FN_P (decl)) | |
3669 | return sfk_conversion; | |
3670 | ||
3671 | return sfk_none; | |
3672 | } | |
7b019c19 | 3673 | |
838dfd8a | 3674 | /* Returns nonzero if TYPE is a character type, including wchar_t. */ |
7b019c19 MM |
3675 | |
3676 | int | |
b57b79f7 | 3677 | char_type_p (tree type) |
7b019c19 MM |
3678 | { |
3679 | return (same_type_p (type, char_type_node) | |
3680 | || same_type_p (type, unsigned_char_type_node) | |
3681 | || same_type_p (type, signed_char_type_node) | |
b6baa67d KVH |
3682 | || same_type_p (type, char16_type_node) |
3683 | || same_type_p (type, char32_type_node) | |
7b019c19 MM |
3684 | || same_type_p (type, wchar_type_node)); |
3685 | } | |
ad50e811 MM |
3686 | |
3687 | /* Returns the kind of linkage associated with the indicated DECL. Th | |
3688 | value returned is as specified by the language standard; it is | |
3689 | independent of implementation details regarding template | |
3690 | instantiation, etc. For example, it is possible that a declaration | |
3691 | to which this function assigns external linkage would not show up | |
3692 | as a global symbol when you run `nm' on the resulting object file. */ | |
3693 | ||
3694 | linkage_kind | |
b57b79f7 | 3695 | decl_linkage (tree decl) |
ad50e811 MM |
3696 | { |
3697 | /* This function doesn't attempt to calculate the linkage from first | |
3698 | principles as given in [basic.link]. Instead, it makes use of | |
3699 | the fact that we have already set TREE_PUBLIC appropriately, and | |
3700 | then handles a few special cases. Ideally, we would calculate | |
3701 | linkage first, and then transform that into a concrete | |
3702 | implementation. */ | |
3703 | ||
3704 | /* Things that don't have names have no linkage. */ | |
3705 | if (!DECL_NAME (decl)) | |
3706 | return lk_none; | |
3707 | ||
c02cdc25 TT |
3708 | /* Fields have no linkage. */ |
3709 | if (TREE_CODE (decl) == FIELD_DECL) | |
3710 | return lk_none; | |
3711 | ||
ad50e811 MM |
3712 | /* Things that are TREE_PUBLIC have external linkage. */ |
3713 | if (TREE_PUBLIC (decl)) | |
3714 | return lk_external; | |
3db45ab5 | 3715 | |
b70f0f48 JM |
3716 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
3717 | return lk_external; | |
3718 | ||
3db45ab5 | 3719 | /* Linkage of a CONST_DECL depends on the linkage of the enumeration |
3f774254 DB |
3720 | type. */ |
3721 | if (TREE_CODE (decl) == CONST_DECL) | |
8d0d1915 | 3722 | return decl_linkage (TYPE_NAME (DECL_CONTEXT (decl))); |
ad50e811 MM |
3723 | |
3724 | /* Some things that are not TREE_PUBLIC have external linkage, too. | |
3725 | For example, on targets that don't have weak symbols, we make all | |
3726 | template instantiations have internal linkage (in the object | |
3727 | file), but the symbols should still be treated as having external | |
3728 | linkage from the point of view of the language. */ | |
cb6da767 | 3729 | if (VAR_OR_FUNCTION_DECL_P (decl) |
b9e75696 | 3730 | && DECL_COMDAT (decl)) |
ad50e811 MM |
3731 | return lk_external; |
3732 | ||
3733 | /* Things in local scope do not have linkage, if they don't have | |
3734 | TREE_PUBLIC set. */ | |
3735 | if (decl_function_context (decl)) | |
3736 | return lk_none; | |
3737 | ||
b70f0f48 JM |
3738 | /* Members of the anonymous namespace also have TREE_PUBLIC unset, but |
3739 | are considered to have external linkage for language purposes. DECLs | |
3740 | really meant to have internal linkage have DECL_THIS_STATIC set. */ | |
ce41114b | 3741 | if (TREE_CODE (decl) == TYPE_DECL) |
b70f0f48 | 3742 | return lk_external; |
cb6da767 | 3743 | if (VAR_OR_FUNCTION_DECL_P (decl)) |
ce41114b JJ |
3744 | { |
3745 | if (!DECL_THIS_STATIC (decl)) | |
3746 | return lk_external; | |
3747 | ||
3748 | /* Static data members and static member functions from classes | |
3749 | in anonymous namespace also don't have TREE_PUBLIC set. */ | |
3750 | if (DECL_CLASS_CONTEXT (decl)) | |
3751 | return lk_external; | |
3752 | } | |
b70f0f48 | 3753 | |
ad50e811 MM |
3754 | /* Everything else has internal linkage. */ |
3755 | return lk_internal; | |
3756 | } | |
b95ca513 JM |
3757 | |
3758 | /* Returns the storage duration of the object or reference associated with | |
3759 | the indicated DECL, which should be a VAR_DECL or PARM_DECL. */ | |
3760 | ||
3761 | duration_kind | |
3762 | decl_storage_duration (tree decl) | |
3763 | { | |
3764 | if (TREE_CODE (decl) == PARM_DECL) | |
3765 | return dk_auto; | |
3766 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
3767 | return dk_static; | |
5a6ccc94 | 3768 | gcc_assert (VAR_P (decl)); |
b95ca513 JM |
3769 | if (!TREE_STATIC (decl) |
3770 | && !DECL_EXTERNAL (decl)) | |
3771 | return dk_auto; | |
3772 | if (DECL_THREAD_LOCAL_P (decl)) | |
3773 | return dk_thread; | |
3774 | return dk_static; | |
3775 | } | |
6f30f1f1 | 3776 | \f |
9beafc83 MM |
3777 | /* EXP is an expression that we want to pre-evaluate. Returns (in |
3778 | *INITP) an expression that will perform the pre-evaluation. The | |
3779 | value returned by this function is a side-effect free expression | |
3780 | equivalent to the pre-evaluated expression. Callers must ensure | |
3781 | that *INITP is evaluated before EXP. */ | |
6f30f1f1 JM |
3782 | |
3783 | tree | |
b57b79f7 | 3784 | stabilize_expr (tree exp, tree* initp) |
6f30f1f1 JM |
3785 | { |
3786 | tree init_expr; | |
3787 | ||
3788 | if (!TREE_SIDE_EFFECTS (exp)) | |
9beafc83 | 3789 | init_expr = NULL_TREE; |
982058cb PC |
3790 | else if (VOID_TYPE_P (TREE_TYPE (exp))) |
3791 | { | |
989e6706 | 3792 | init_expr = exp; |
632f2871 | 3793 | exp = void_node; |
982058cb | 3794 | } |
e3edeff4 JM |
3795 | /* There are no expressions with REFERENCE_TYPE, but there can be call |
3796 | arguments with such a type; just treat it as a pointer. */ | |
3797 | else if (TREE_CODE (TREE_TYPE (exp)) == REFERENCE_TYPE | |
fa07d25b | 3798 | || SCALAR_TYPE_P (TREE_TYPE (exp)) |
883fff6c | 3799 | || !lvalue_or_rvalue_with_address_p (exp)) |
6f30f1f1 JM |
3800 | { |
3801 | init_expr = get_target_expr (exp); | |
3802 | exp = TARGET_EXPR_SLOT (init_expr); | |
fc2bfea1 JM |
3803 | if (CLASS_TYPE_P (TREE_TYPE (exp))) |
3804 | exp = move (exp); | |
3805 | else | |
3806 | exp = rvalue (exp); | |
6f30f1f1 JM |
3807 | } |
3808 | else | |
3809 | { | |
883fff6c | 3810 | bool xval = !real_lvalue_p (exp); |
93c0e0bb | 3811 | exp = cp_build_addr_expr (exp, tf_warning_or_error); |
6f30f1f1 JM |
3812 | init_expr = get_target_expr (exp); |
3813 | exp = TARGET_EXPR_SLOT (init_expr); | |
dd865ef6 | 3814 | exp = cp_build_indirect_ref (exp, RO_NULL, tf_warning_or_error); |
883fff6c JM |
3815 | if (xval) |
3816 | exp = move (exp); | |
6f30f1f1 | 3817 | } |
6f30f1f1 | 3818 | *initp = init_expr; |
9beafc83 MM |
3819 | |
3820 | gcc_assert (!TREE_SIDE_EFFECTS (exp)); | |
6f30f1f1 JM |
3821 | return exp; |
3822 | } | |
6de9cd9a | 3823 | |
be93747e | 3824 | /* Add NEW_EXPR, an expression whose value we don't care about, after the |
40aac948 JM |
3825 | similar expression ORIG. */ |
3826 | ||
3827 | tree | |
be93747e | 3828 | add_stmt_to_compound (tree orig, tree new_expr) |
40aac948 | 3829 | { |
be93747e | 3830 | if (!new_expr || !TREE_SIDE_EFFECTS (new_expr)) |
40aac948 JM |
3831 | return orig; |
3832 | if (!orig || !TREE_SIDE_EFFECTS (orig)) | |
be93747e KG |
3833 | return new_expr; |
3834 | return build2 (COMPOUND_EXPR, void_type_node, orig, new_expr); | |
40aac948 JM |
3835 | } |
3836 | ||
9beafc83 MM |
3837 | /* Like stabilize_expr, but for a call whose arguments we want to |
3838 | pre-evaluate. CALL is modified in place to use the pre-evaluated | |
3839 | arguments, while, upon return, *INITP contains an expression to | |
3840 | compute the arguments. */ | |
6de9cd9a DN |
3841 | |
3842 | void | |
3843 | stabilize_call (tree call, tree *initp) | |
3844 | { | |
3845 | tree inits = NULL_TREE; | |
5039610b SL |
3846 | int i; |
3847 | int nargs = call_expr_nargs (call); | |
6de9cd9a | 3848 | |
28267cfc JJ |
3849 | if (call == error_mark_node || processing_template_decl) |
3850 | { | |
3851 | *initp = NULL_TREE; | |
3852 | return; | |
3853 | } | |
6de9cd9a | 3854 | |
5039610b | 3855 | gcc_assert (TREE_CODE (call) == CALL_EXPR); |
6de9cd9a | 3856 | |
5039610b SL |
3857 | for (i = 0; i < nargs; i++) |
3858 | { | |
3859 | tree init; | |
3860 | CALL_EXPR_ARG (call, i) = | |
3861 | stabilize_expr (CALL_EXPR_ARG (call, i), &init); | |
3862 | inits = add_stmt_to_compound (inits, init); | |
3863 | } | |
3864 | ||
3865 | *initp = inits; | |
3866 | } | |
3867 | ||
3868 | /* Like stabilize_expr, but for an AGGR_INIT_EXPR whose arguments we want | |
3869 | to pre-evaluate. CALL is modified in place to use the pre-evaluated | |
3870 | arguments, while, upon return, *INITP contains an expression to | |
3871 | compute the arguments. */ | |
3872 | ||
81bd268c | 3873 | static void |
5039610b SL |
3874 | stabilize_aggr_init (tree call, tree *initp) |
3875 | { | |
3876 | tree inits = NULL_TREE; | |
3877 | int i; | |
3878 | int nargs = aggr_init_expr_nargs (call); | |
3879 | ||
3880 | if (call == error_mark_node) | |
3881 | return; | |
3882 | ||
3883 | gcc_assert (TREE_CODE (call) == AGGR_INIT_EXPR); | |
3884 | ||
3885 | for (i = 0; i < nargs; i++) | |
3886 | { | |
3887 | tree init; | |
3888 | AGGR_INIT_EXPR_ARG (call, i) = | |
3889 | stabilize_expr (AGGR_INIT_EXPR_ARG (call, i), &init); | |
3890 | inits = add_stmt_to_compound (inits, init); | |
3891 | } | |
6de9cd9a DN |
3892 | |
3893 | *initp = inits; | |
3894 | } | |
3895 | ||
9beafc83 MM |
3896 | /* Like stabilize_expr, but for an initialization. |
3897 | ||
3898 | If the initialization is for an object of class type, this function | |
3899 | takes care not to introduce additional temporaries. | |
3900 | ||
3901 | Returns TRUE iff the expression was successfully pre-evaluated, | |
66edf32a | 3902 | i.e., if INIT is now side-effect free, except for, possibly, a |
9beafc83 | 3903 | single call to a constructor. */ |
6de9cd9a DN |
3904 | |
3905 | bool | |
3906 | stabilize_init (tree init, tree *initp) | |
3907 | { | |
3908 | tree t = init; | |
3909 | ||
9beafc83 MM |
3910 | *initp = NULL_TREE; |
3911 | ||
28267cfc | 3912 | if (t == error_mark_node || processing_template_decl) |
6de9cd9a DN |
3913 | return true; |
3914 | ||
9beafc83 MM |
3915 | if (TREE_CODE (t) == INIT_EXPR) |
3916 | t = TREE_OPERAND (t, 1); | |
3917 | if (TREE_CODE (t) == TARGET_EXPR) | |
3918 | t = TARGET_EXPR_INITIAL (t); | |
66edf32a JM |
3919 | |
3920 | /* If the RHS can be stabilized without breaking copy elision, stabilize | |
3921 | it. We specifically don't stabilize class prvalues here because that | |
3922 | would mean an extra copy, but they might be stabilized below. */ | |
3923 | if (TREE_CODE (init) == INIT_EXPR | |
3924 | && TREE_CODE (t) != CONSTRUCTOR | |
3925 | && TREE_CODE (t) != AGGR_INIT_EXPR | |
3926 | && (SCALAR_TYPE_P (TREE_TYPE (t)) | |
3927 | || lvalue_or_rvalue_with_address_p (t))) | |
3928 | { | |
3929 | TREE_OPERAND (init, 1) = stabilize_expr (t, initp); | |
3930 | return true; | |
3931 | } | |
3932 | ||
3933 | if (TREE_CODE (t) == COMPOUND_EXPR | |
3934 | && TREE_CODE (init) == INIT_EXPR) | |
3935 | { | |
3936 | tree last = expr_last (t); | |
3937 | /* Handle stabilizing the EMPTY_CLASS_EXPR pattern. */ | |
3938 | if (!TREE_SIDE_EFFECTS (last)) | |
3939 | { | |
3940 | *initp = t; | |
3941 | TREE_OPERAND (init, 1) = last; | |
3942 | return true; | |
3943 | } | |
3944 | } | |
3945 | ||
b9d6b015 JM |
3946 | if (TREE_CODE (t) == CONSTRUCTOR) |
3947 | { | |
3948 | /* Aggregate initialization: stabilize each of the field | |
3949 | initializers. */ | |
3950 | unsigned i; | |
0c59fd2f | 3951 | constructor_elt *ce; |
b9d6b015 | 3952 | bool good = true; |
9771b263 DN |
3953 | vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (t); |
3954 | for (i = 0; vec_safe_iterate (v, i, &ce); ++i) | |
0c59fd2f JM |
3955 | { |
3956 | tree type = TREE_TYPE (ce->value); | |
3957 | tree subinit; | |
3958 | if (TREE_CODE (type) == REFERENCE_TYPE | |
3959 | || SCALAR_TYPE_P (type)) | |
3960 | ce->value = stabilize_expr (ce->value, &subinit); | |
3961 | else if (!stabilize_init (ce->value, &subinit)) | |
3962 | good = false; | |
3963 | *initp = add_stmt_to_compound (*initp, subinit); | |
3964 | } | |
b9d6b015 JM |
3965 | return good; |
3966 | } | |
9beafc83 | 3967 | |
5039610b | 3968 | if (TREE_CODE (t) == CALL_EXPR) |
9beafc83 MM |
3969 | { |
3970 | stabilize_call (t, initp); | |
3971 | return true; | |
6de9cd9a DN |
3972 | } |
3973 | ||
5039610b SL |
3974 | if (TREE_CODE (t) == AGGR_INIT_EXPR) |
3975 | { | |
3976 | stabilize_aggr_init (t, initp); | |
3977 | return true; | |
3978 | } | |
3979 | ||
9beafc83 MM |
3980 | /* The initialization is being performed via a bitwise copy -- and |
3981 | the item copied may have side effects. */ | |
4bbbcbf6 | 3982 | return !TREE_SIDE_EFFECTS (init); |
6de9cd9a DN |
3983 | } |
3984 | ||
455f19cb MM |
3985 | /* Like "fold", but should be used whenever we might be processing the |
3986 | body of a template. */ | |
3987 | ||
3988 | tree | |
3989 | fold_if_not_in_template (tree expr) | |
3990 | { | |
3991 | /* In the body of a template, there is never any need to call | |
3992 | "fold". We will call fold later when actually instantiating the | |
3993 | template. Integral constant expressions in templates will be | |
f9f1c24e | 3994 | evaluated via fold_non_dependent_expr, as necessary. */ |
392e3d51 RS |
3995 | if (processing_template_decl) |
3996 | return expr; | |
3997 | ||
3998 | /* Fold C++ front-end specific tree codes. */ | |
3999 | if (TREE_CODE (expr) == UNARY_PLUS_EXPR) | |
4000 | return fold_convert (TREE_TYPE (expr), TREE_OPERAND (expr, 0)); | |
4001 | ||
4002 | return fold (expr); | |
455f19cb MM |
4003 | } |
4004 | ||
015c2c66 MM |
4005 | /* Returns true if a cast to TYPE may appear in an integral constant |
4006 | expression. */ | |
4007 | ||
4008 | bool | |
4009 | cast_valid_in_integral_constant_expression_p (tree type) | |
4010 | { | |
4011 | return (INTEGRAL_OR_ENUMERATION_TYPE_P (type) | |
604b2bfc | 4012 | || cxx_dialect >= cxx11 |
015c2c66 MM |
4013 | || dependent_type_p (type) |
4014 | || type == error_mark_node); | |
4015 | } | |
4016 | ||
4537ec0c DN |
4017 | /* Return true if we need to fix linkage information of DECL. */ |
4018 | ||
4019 | static bool | |
4020 | cp_fix_function_decl_p (tree decl) | |
4021 | { | |
4022 | /* Skip if DECL is not externally visible. */ | |
4023 | if (!TREE_PUBLIC (decl)) | |
4024 | return false; | |
4025 | ||
4026 | /* We need to fix DECL if it a appears to be exported but with no | |
4027 | function body. Thunks do not have CFGs and we may need to | |
4028 | handle them specially later. */ | |
4029 | if (!gimple_has_body_p (decl) | |
4030 | && !DECL_THUNK_P (decl) | |
4031 | && !DECL_EXTERNAL (decl)) | |
87501227 JJ |
4032 | { |
4033 | struct cgraph_node *node = cgraph_get_node (decl); | |
4034 | ||
4035 | /* Don't fix same_body aliases. Although they don't have their own | |
4036 | CFG, they share it with what they alias to. */ | |
67348ccc DM |
4037 | if (!node || !node->alias |
4038 | || !vec_safe_length (node->ref_list.references)) | |
87501227 JJ |
4039 | return true; |
4040 | } | |
4537ec0c DN |
4041 | |
4042 | return false; | |
4043 | } | |
4044 | ||
4045 | /* Clean the C++ specific parts of the tree T. */ | |
4046 | ||
4047 | void | |
4048 | cp_free_lang_data (tree t) | |
4049 | { | |
4050 | if (TREE_CODE (t) == METHOD_TYPE | |
4051 | || TREE_CODE (t) == FUNCTION_TYPE) | |
4052 | { | |
4053 | /* Default args are not interesting anymore. */ | |
4054 | tree argtypes = TYPE_ARG_TYPES (t); | |
4055 | while (argtypes) | |
4056 | { | |
4057 | TREE_PURPOSE (argtypes) = 0; | |
4058 | argtypes = TREE_CHAIN (argtypes); | |
4059 | } | |
4060 | } | |
4061 | else if (TREE_CODE (t) == FUNCTION_DECL | |
4062 | && cp_fix_function_decl_p (t)) | |
4063 | { | |
4064 | /* If T is used in this translation unit at all, the definition | |
4065 | must exist somewhere else since we have decided to not emit it | |
4066 | in this TU. So make it an external reference. */ | |
4067 | DECL_EXTERNAL (t) = 1; | |
4068 | TREE_STATIC (t) = 0; | |
4069 | } | |
b4ca4f9e RG |
4070 | if (TREE_CODE (t) == NAMESPACE_DECL) |
4071 | { | |
4072 | /* The list of users of a namespace isn't useful for the middle-end | |
4073 | or debug generators. */ | |
4074 | DECL_NAMESPACE_USERS (t) = NULL_TREE; | |
4075 | /* Neither do we need the leftover chaining of namespaces | |
4076 | from the binding level. */ | |
4077 | DECL_CHAIN (t) = NULL_TREE; | |
4078 | } | |
4537ec0c DN |
4079 | } |
4080 | ||
bffad7f1 SB |
4081 | /* Stub for c-common. Please keep in sync with c-decl.c. |
4082 | FIXME: If address space support is target specific, then this | |
4083 | should be a C target hook. But currently this is not possible, | |
4084 | because this function is called via REGISTER_TARGET_PRAGMAS. */ | |
4085 | void | |
12308bc6 | 4086 | c_register_addr_space (const char * /*word*/, addr_space_t /*as*/) |
bffad7f1 SB |
4087 | { |
4088 | } | |
4089 | ||
d26e5986 NF |
4090 | /* Return the number of operands in T that we care about for things like |
4091 | mangling. */ | |
4092 | ||
4093 | int | |
4094 | cp_tree_operand_length (const_tree t) | |
4095 | { | |
4096 | enum tree_code code = TREE_CODE (t); | |
4097 | ||
4098 | switch (code) | |
4099 | { | |
4100 | case PREINCREMENT_EXPR: | |
4101 | case PREDECREMENT_EXPR: | |
4102 | case POSTINCREMENT_EXPR: | |
4103 | case POSTDECREMENT_EXPR: | |
4104 | return 1; | |
4105 | ||
4106 | case ARRAY_REF: | |
4107 | return 2; | |
4108 | ||
4109 | case EXPR_PACK_EXPANSION: | |
4110 | return 1; | |
4111 | ||
4112 | default: | |
4113 | return TREE_OPERAND_LENGTH (t); | |
4114 | } | |
4115 | } | |
30b07d03 PC |
4116 | |
4117 | /* Implement -Wzero_as_null_pointer_constant. Return true if the | |
4118 | conditions for the warning hold, false otherwise. */ | |
4119 | bool | |
4120 | maybe_warn_zero_as_null_pointer_constant (tree expr, location_t loc) | |
4121 | { | |
4122 | if (c_inhibit_evaluation_warnings == 0 | |
4123 | && !NULLPTR_TYPE_P (TREE_TYPE (expr))) | |
4124 | { | |
4125 | warning_at (loc, OPT_Wzero_as_null_pointer_constant, | |
4126 | "zero as null pointer constant"); | |
4127 | return true; | |
4128 | } | |
4129 | return false; | |
4130 | } | |
e2500fed GK |
4131 | \f |
4132 | #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007) | |
4133 | /* Complain that some language-specific thing hanging off a tree | |
4134 | node has been accessed improperly. */ | |
4135 | ||
4136 | void | |
b57b79f7 | 4137 | lang_check_failed (const char* file, int line, const char* function) |
e2500fed GK |
4138 | { |
4139 | internal_error ("lang_* check: failed in %s, at %s:%d", | |
4140 | function, trim_filename (file), line); | |
4141 | } | |
4142 | #endif /* ENABLE_TREE_CHECKING */ | |
4143 | ||
4144 | #include "gt-cp-tree.h" |