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1 : : /* Process declarations and variables for C compiler.
2 : : Copyright (C) 1988-2024 Free Software Foundation, Inc.
3 : :
4 : : This file is part of GCC.
5 : :
6 : : GCC is free software; you can redistribute it and/or modify it under
7 : : the terms of the GNU General Public License as published by the Free
8 : : Software Foundation; either version 3, or (at your option) any later
9 : : version.
10 : :
11 : : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 : : WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 : : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 : : for more details.
15 : :
16 : : You should have received a copy of the GNU General Public License
17 : : along with GCC; see the file COPYING3. If not see
18 : : <http://www.gnu.org/licenses/>. */
19 : :
20 : : /* Process declarations and symbol lookup for C front end.
21 : : Also constructs types; the standard scalar types at initialization,
22 : : and structure, union, array and enum types when they are declared. */
23 : :
24 : : /* ??? not all decl nodes are given the most useful possible
25 : : line numbers. For example, the CONST_DECLs for enum values. */
26 : :
27 : : #include "config.h"
28 : : #define INCLUDE_STRING
29 : : #define INCLUDE_MEMORY
30 : : #include "system.h"
31 : : #include "coretypes.h"
32 : : #include "target.h"
33 : : #include "function.h"
34 : : #include "c-tree.h"
35 : : #include "timevar.h"
36 : : #include "stringpool.h"
37 : : #include "cgraph.h"
38 : : #include "intl.h"
39 : : #include "print-tree.h"
40 : : #include "stor-layout.h"
41 : : #include "varasm.h"
42 : : #include "attribs.h"
43 : : #include "toplev.h"
44 : : #include "debug.h"
45 : : #include "c-family/c-objc.h"
46 : : #include "c-family/c-pragma.h"
47 : : #include "c-family/c-ubsan.h"
48 : : #include "c-lang.h"
49 : : #include "langhooks.h"
50 : : #include "tree-iterator.h"
51 : : #include "dumpfile.h"
52 : : #include "plugin.h"
53 : : #include "c-family/c-ada-spec.h"
54 : : #include "builtins.h"
55 : : #include "spellcheck-tree.h"
56 : : #include "gcc-rich-location.h"
57 : : #include "asan.h"
58 : : #include "c-family/name-hint.h"
59 : : #include "c-family/known-headers.h"
60 : : #include "c-family/c-spellcheck.h"
61 : : #include "context.h" /* For 'g'. */
62 : : #include "omp-general.h"
63 : : #include "omp-offload.h" /* For offload_vars. */
64 : : #include "c-parser.h"
65 : :
66 : : #include "tree-pretty-print.h"
67 : :
68 : : /* In grokdeclarator, distinguish syntactic contexts of declarators. */
69 : : enum decl_context
70 : : { NORMAL, /* Ordinary declaration */
71 : : FUNCDEF, /* Function definition */
72 : : PARM, /* Declaration of parm before function body */
73 : : FIELD, /* Declaration inside struct or union */
74 : : TYPENAME}; /* Typename (inside cast or sizeof) */
75 : :
76 : : /* States indicating how grokdeclarator() should handle declspecs marked
77 : : with __attribute__((deprecated)) or __attribute__((unavailable)).
78 : : An object declared as __attribute__((unavailable)) should suppress
79 : : any reports of being declared with unavailable or deprecated items.
80 : : An object declared as __attribute__((deprecated)) should suppress
81 : : warnings of uses of other deprecated items. */
82 : :
83 : : enum deprecated_states {
84 : : DEPRECATED_NORMAL,
85 : : DEPRECATED_SUPPRESS,
86 : : UNAVAILABLE_DEPRECATED_SUPPRESS
87 : : };
88 : :
89 : :
90 : : /* Nonzero if we have seen an invalid cross reference
91 : : to a struct, union, or enum, but not yet printed the message. */
92 : : tree pending_invalid_xref;
93 : :
94 : : /* File and line to appear in the eventual error message. */
95 : : location_t pending_invalid_xref_location;
96 : :
97 : : /* The file and line that the prototype came from if this is an
98 : : old-style definition; used for diagnostics in
99 : : store_parm_decls_oldstyle. */
100 : :
101 : : static location_t current_function_prototype_locus;
102 : :
103 : : /* Whether this prototype was built-in. */
104 : :
105 : : static bool current_function_prototype_built_in;
106 : :
107 : : /* The argument type information of this prototype. */
108 : :
109 : : static tree current_function_prototype_arg_types;
110 : :
111 : : /* The argument information structure for the function currently being
112 : : defined. */
113 : :
114 : : static struct c_arg_info *current_function_arg_info;
115 : :
116 : : /* The obstack on which parser and related data structures, which are
117 : : not live beyond their top-level declaration or definition, are
118 : : allocated. */
119 : : struct obstack parser_obstack;
120 : :
121 : : /* The current statement tree. */
122 : :
123 : : static GTY(()) struct stmt_tree_s c_stmt_tree;
124 : :
125 : : /* Zero if we are not in an iteration or switch statement, otherwise
126 : : a bitmask. See bitmask definitions in c-tree.h. */
127 : : unsigned char in_statement;
128 : :
129 : : /* A list of decls to be made automatically visible in each file scope. */
130 : : static GTY(()) tree visible_builtins;
131 : :
132 : : /* Set to 0 at beginning of a function definition, set to 1 if
133 : : a return statement that specifies a return value is seen. */
134 : :
135 : : int current_function_returns_value;
136 : :
137 : : /* Set to 0 at beginning of a function definition, set to 1 if
138 : : a return statement with no argument is seen. */
139 : :
140 : : int current_function_returns_null;
141 : :
142 : : /* Set to 0 at beginning of a function definition, set to 1 if
143 : : a call to a noreturn function is seen. */
144 : :
145 : : int current_function_returns_abnormally;
146 : :
147 : : /* Set to nonzero by `grokdeclarator' for a function
148 : : whose return type is defaulted, if warnings for this are desired. */
149 : :
150 : : static int warn_about_return_type;
151 : :
152 : : /* Nonzero when the current toplevel function contains a declaration
153 : : of a nested function which is never defined. */
154 : :
155 : : static bool undef_nested_function;
156 : :
157 : : /* Vector of implicit "omp declare target" attributes to be added into
158 : : the attribute lists. */
159 : : vec<c_omp_declare_target_attr, va_gc> *current_omp_declare_target_attribute;
160 : :
161 : : /* Vector of
162 : : #pragma omp begin assumes ... #pragma omp end assumes regions
163 : : we are in. */
164 : : vec<c_omp_begin_assumes_data, va_gc> *current_omp_begin_assumes;
165 : :
166 : : /* Each c_binding structure describes one binding of an identifier to
167 : : a decl. All the decls in a scope - irrespective of namespace - are
168 : : chained together by the ->prev field, which (as the name implies)
169 : : runs in reverse order. All the decls in a given namespace bound to
170 : : a given identifier are chained by the ->shadowed field, which runs
171 : : from inner to outer scopes.
172 : :
173 : : The ->decl field usually points to a DECL node, but there are two
174 : : exceptions. In the namespace of type tags, the bound entity is a
175 : : RECORD_TYPE, UNION_TYPE, or ENUMERAL_TYPE node. If an undeclared
176 : : identifier is encountered, it is bound to error_mark_node to
177 : : suppress further errors about that identifier in the current
178 : : function.
179 : :
180 : : The ->u.type field stores the type of the declaration in this scope;
181 : : if NULL, the type is the type of the ->decl field. This is only of
182 : : relevance for objects with external or internal linkage which may
183 : : be redeclared in inner scopes, forming composite types that only
184 : : persist for the duration of those scopes. In the external scope,
185 : : this stores the composite of all the types declared for this
186 : : object, visible or not. The ->inner_comp field (used only at file
187 : : scope) stores whether an incomplete array type at file scope was
188 : : completed at an inner scope to an array size other than 1.
189 : :
190 : : The ->u.label field is used for labels. It points to a structure
191 : : which stores additional information used for warnings.
192 : :
193 : : The depth field is copied from the scope structure that holds this
194 : : decl. It is used to preserve the proper ordering of the ->shadowed
195 : : field (see bind()) and also for a handful of special-case checks.
196 : : Finally, the invisible bit is true for a decl which should be
197 : : ignored for purposes of normal name lookup, and the nested bit is
198 : : true for a decl that's been bound a second time in an inner scope;
199 : : in all such cases, the binding in the outer scope will have its
200 : : invisible bit true. */
201 : :
202 : : struct GTY((chain_next ("%h.prev"))) c_binding {
203 : : union GTY(()) { /* first so GTY desc can use decl */
204 : : tree GTY((tag ("0"))) type; /* the type in this scope */
205 : : struct c_label_vars * GTY((tag ("1"))) label; /* for warnings */
206 : : } GTY((desc ("TREE_CODE (%0.decl) == LABEL_DECL"))) u;
207 : : tree decl; /* the decl bound */
208 : : tree id; /* the identifier it's bound to */
209 : : struct c_binding *prev; /* the previous decl in this scope */
210 : : struct c_binding *shadowed; /* the innermost decl shadowed by this one */
211 : : unsigned int depth : 28; /* depth of this scope */
212 : : BOOL_BITFIELD invisible : 1; /* normal lookup should ignore this binding */
213 : : BOOL_BITFIELD nested : 1; /* do not set DECL_CONTEXT when popping */
214 : : BOOL_BITFIELD inner_comp : 1; /* incomplete array completed in inner scope */
215 : : BOOL_BITFIELD in_struct : 1; /* currently defined as struct field */
216 : : location_t locus; /* location for nested bindings */
217 : : };
218 : : #define B_IN_SCOPE(b1, b2) ((b1)->depth == (b2)->depth)
219 : : #define B_IN_CURRENT_SCOPE(b) ((b)->depth == current_scope->depth)
220 : : #define B_IN_FILE_SCOPE(b) ((b)->depth == 1 /*file_scope->depth*/)
221 : : #define B_IN_EXTERNAL_SCOPE(b) ((b)->depth == 0 /*external_scope->depth*/)
222 : :
223 : : /* Each C symbol points to three linked lists of c_binding structures.
224 : : These describe the values of the identifier in the three different
225 : : namespaces defined by the language. */
226 : :
227 : : struct GTY(()) lang_identifier {
228 : : struct c_common_identifier common_id;
229 : : struct c_binding *symbol_binding; /* vars, funcs, constants, typedefs */
230 : : struct c_binding *tag_binding; /* struct/union/enum tags */
231 : : struct c_binding *label_binding; /* labels */
232 : : };
233 : :
234 : : /* Validate c-lang.cc's assumptions. */
235 : : extern char C_SIZEOF_STRUCT_LANG_IDENTIFIER_isnt_accurate
236 : : [(sizeof(struct lang_identifier) == C_SIZEOF_STRUCT_LANG_IDENTIFIER) ? 1 : -1];
237 : :
238 : : /* The binding oracle; see c-tree.h. */
239 : : void (*c_binding_oracle) (enum c_oracle_request, tree identifier);
240 : :
241 : : /* This flag is set on an identifier if we have previously asked the
242 : : binding oracle for this identifier's symbol binding. */
243 : : #define I_SYMBOL_CHECKED(node) \
244 : : (TREE_LANG_FLAG_4 (IDENTIFIER_NODE_CHECK (node)))
245 : :
246 : : static inline struct c_binding* *
247 : 4066569105 : i_symbol_binding (tree node)
248 : : {
249 : 4066569105 : struct lang_identifier *lid
250 : 4066569105 : = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node);
251 : :
252 : 4066569105 : if (lid->symbol_binding == NULL
253 : 1492032926 : && c_binding_oracle != NULL
254 : 4066569105 : && !I_SYMBOL_CHECKED (node))
255 : : {
256 : : /* Set the "checked" flag first, to avoid infinite recursion
257 : : when the binding oracle calls back into gcc. */
258 : 0 : I_SYMBOL_CHECKED (node) = 1;
259 : 0 : c_binding_oracle (C_ORACLE_SYMBOL, node);
260 : : }
261 : :
262 : 4066569105 : return &lid->symbol_binding;
263 : : }
264 : :
265 : : #define I_SYMBOL_BINDING(node) (*i_symbol_binding (node))
266 : :
267 : : #define I_SYMBOL_DECL(node) \
268 : : (I_SYMBOL_BINDING(node) ? I_SYMBOL_BINDING(node)->decl : 0)
269 : :
270 : : /* This flag is set on an identifier if we have previously asked the
271 : : binding oracle for this identifier's tag binding. */
272 : : #define I_TAG_CHECKED(node) \
273 : : (TREE_LANG_FLAG_5 (IDENTIFIER_NODE_CHECK (node)))
274 : :
275 : : static inline struct c_binding **
276 : 3707045 : i_tag_binding (tree node)
277 : : {
278 : 3707045 : struct lang_identifier *lid
279 : 3707045 : = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node);
280 : :
281 : 3707045 : if (lid->tag_binding == NULL
282 : 1173666 : && c_binding_oracle != NULL
283 : 3707045 : && !I_TAG_CHECKED (node))
284 : : {
285 : : /* Set the "checked" flag first, to avoid infinite recursion
286 : : when the binding oracle calls back into gcc. */
287 : 0 : I_TAG_CHECKED (node) = 1;
288 : 0 : c_binding_oracle (C_ORACLE_TAG, node);
289 : : }
290 : :
291 : 3707045 : return &lid->tag_binding;
292 : : }
293 : :
294 : : #define I_TAG_BINDING(node) (*i_tag_binding (node))
295 : :
296 : : #define I_TAG_DECL(node) \
297 : : (I_TAG_BINDING(node) ? I_TAG_BINDING(node)->decl : 0)
298 : :
299 : : /* This flag is set on an identifier if we have previously asked the
300 : : binding oracle for this identifier's label binding. */
301 : : #define I_LABEL_CHECKED(node) \
302 : : (TREE_LANG_FLAG_6 (IDENTIFIER_NODE_CHECK (node)))
303 : :
304 : : static inline struct c_binding **
305 : 350402 : i_label_binding (tree node)
306 : : {
307 : 350402 : struct lang_identifier *lid
308 : 350402 : = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node);
309 : :
310 : 350402 : if (lid->label_binding == NULL
311 : 45234 : && c_binding_oracle != NULL
312 : 350402 : && !I_LABEL_CHECKED (node))
313 : : {
314 : : /* Set the "checked" flag first, to avoid infinite recursion
315 : : when the binding oracle calls back into gcc. */
316 : 0 : I_LABEL_CHECKED (node) = 1;
317 : 0 : c_binding_oracle (C_ORACLE_LABEL, node);
318 : : }
319 : :
320 : 350402 : return &lid->label_binding;
321 : : }
322 : :
323 : : #define I_LABEL_BINDING(node) (*i_label_binding (node))
324 : :
325 : : #define I_LABEL_DECL(node) \
326 : : (I_LABEL_BINDING(node) ? I_LABEL_BINDING(node)->decl : 0)
327 : :
328 : : /* Used by C_TOKEN_VEC tree. */
329 : : struct GTY (()) c_tree_token_vec {
330 : : struct tree_base base;
331 : : vec<c_token, va_gc> *tokens;
332 : : };
333 : :
334 : : STATIC_ASSERT (sizeof (c_tree_token_vec) == sizeof (c_tree_token_vec_struct));
335 : : STATIC_ASSERT (offsetof (c_tree_token_vec, tokens)
336 : : == offsetof (c_tree_token_vec_struct, tokens));
337 : :
338 : : /* The resulting tree type. */
339 : :
340 : : union GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE + 2 * (TREE_CODE (&%h.generic) == C_TOKEN_VEC)"),
341 : : chain_next ("(union lang_tree_node *) c_tree_chain_next (&%h.generic)"))) lang_tree_node
342 : : {
343 : : union tree_node GTY ((tag ("0"),
344 : : desc ("tree_node_structure (&%h)")))
345 : : generic;
346 : : struct lang_identifier GTY ((tag ("1"))) identifier;
347 : : struct c_tree_token_vec GTY ((tag ("2"))) c_token_vec;
348 : : };
349 : :
350 : : /* Langhook for tree_size. */
351 : : size_t
352 : 640 : c_tree_size (enum tree_code code)
353 : : {
354 : 640 : gcc_checking_assert (code >= NUM_TREE_CODES);
355 : 640 : switch (code)
356 : : {
357 : : case C_TOKEN_VEC: return sizeof (c_tree_token_vec);
358 : 0 : default:
359 : 0 : switch (TREE_CODE_CLASS (code))
360 : : {
361 : : case tcc_declaration: return sizeof (tree_decl_non_common);
362 : 0 : case tcc_type: return sizeof (tree_type_non_common);
363 : 0 : default: gcc_unreachable ();
364 : : }
365 : : }
366 : : }
367 : :
368 : : /* Track bindings and other things that matter for goto warnings. For
369 : : efficiency, we do not gather all the decls at the point of
370 : : definition. Instead, we point into the bindings structure. As
371 : : scopes are popped, we update these structures and gather the decls
372 : : that matter at that time. */
373 : :
374 : : struct GTY(()) c_spot_bindings {
375 : : /* The currently open scope which holds bindings defined when the
376 : : label was defined or the goto statement was found. */
377 : : struct c_scope *scope;
378 : : /* The bindings in the scope field which were defined at the point
379 : : of the label or goto. This lets us look at older or newer
380 : : bindings in the scope, as appropriate. */
381 : : struct c_binding *bindings_in_scope;
382 : : /* The number of statement expressions that have started since this
383 : : label or goto statement was defined. This is zero if we are at
384 : : the same statement expression level. It is positive if we are in
385 : : a statement expression started since this spot. It is negative
386 : : if this spot was in a statement expression and we have left
387 : : it. */
388 : : int stmt_exprs;
389 : : /* Whether we started in a statement expression but are no longer in
390 : : it. This is set to true if stmt_exprs ever goes negative. */
391 : : bool left_stmt_expr;
392 : : };
393 : :
394 : : /* This structure is used to keep track of bindings seen when a goto
395 : : statement is defined. This is only used if we see the goto
396 : : statement before we see the label. */
397 : :
398 : : struct GTY(()) c_goto_bindings {
399 : : /* The location of the goto statement. */
400 : : location_t loc;
401 : : /* The bindings of the goto statement. */
402 : : struct c_spot_bindings goto_bindings;
403 : : };
404 : :
405 : : typedef struct c_goto_bindings *c_goto_bindings_p;
406 : :
407 : : /* The additional information we keep track of for a label binding.
408 : : These fields are updated as scopes are popped. */
409 : :
410 : : struct GTY(()) c_label_vars {
411 : : /* The shadowed c_label_vars, when one label shadows another (which
412 : : can only happen using a __label__ declaration). */
413 : : struct c_label_vars *shadowed;
414 : : /* The bindings when the label was defined. */
415 : : struct c_spot_bindings label_bindings;
416 : : /* A list of decls that we care about: decls about which we should
417 : : warn if a goto branches to this label from later in the function.
418 : : Decls are added to this list as scopes are popped. We only add
419 : : the decls that matter. */
420 : : vec<tree, va_gc> *decls_in_scope;
421 : : /* A list of goto statements to this label. This is only used for
422 : : goto statements seen before the label was defined, so that we can
423 : : issue appropriate warnings for them. */
424 : : vec<c_goto_bindings_p, va_gc> *gotos;
425 : : };
426 : :
427 : : /* Each c_scope structure describes the complete contents of one
428 : : scope. Four scopes are distinguished specially: the innermost or
429 : : current scope, the innermost function scope, the file scope (always
430 : : the second to outermost) and the outermost or external scope.
431 : :
432 : : Most declarations are recorded in the current scope.
433 : :
434 : : All normal label declarations are recorded in the innermost
435 : : function scope, as are bindings of undeclared identifiers to
436 : : error_mark_node. (GCC permits nested functions as an extension,
437 : : hence the 'innermost' qualifier.) Explicitly declared labels
438 : : (using the __label__ extension) appear in the current scope.
439 : :
440 : : Being in the file scope (current_scope == file_scope) causes
441 : : special behavior in several places below. Also, under some
442 : : conditions the Objective-C front end records declarations in the
443 : : file scope even though that isn't the current scope.
444 : :
445 : : All declarations with external linkage are recorded in the external
446 : : scope, even if they aren't visible there; this models the fact that
447 : : such declarations are visible to the entire program, and (with a
448 : : bit of cleverness, see pushdecl) allows diagnosis of some violations
449 : : of C99 6.2.2p7 and 6.2.7p2:
450 : :
451 : : If, within the same translation unit, the same identifier appears
452 : : with both internal and external linkage, the behavior is
453 : : undefined.
454 : :
455 : : All declarations that refer to the same object or function shall
456 : : have compatible type; otherwise, the behavior is undefined.
457 : :
458 : : Initially only the built-in declarations, which describe compiler
459 : : intrinsic functions plus a subset of the standard library, are in
460 : : this scope.
461 : :
462 : : The order of the blocks list matters, and it is frequently appended
463 : : to. To avoid having to walk all the way to the end of the list on
464 : : each insertion, or reverse the list later, we maintain a pointer to
465 : : the last list entry. (FIXME: It should be feasible to use a reversed
466 : : list here.)
467 : :
468 : : The bindings list is strictly in reverse order of declarations;
469 : : pop_scope relies on this. */
470 : :
471 : :
472 : : struct GTY((chain_next ("%h.outer"))) c_scope {
473 : : /* The scope containing this one. */
474 : : struct c_scope *outer;
475 : :
476 : : /* The next outermost function scope. */
477 : : struct c_scope *outer_function;
478 : :
479 : : /* All bindings in this scope. */
480 : : struct c_binding *bindings;
481 : :
482 : : /* For each scope (except the global one), a chain of BLOCK nodes
483 : : for all the scopes that were entered and exited one level down. */
484 : : tree blocks;
485 : : tree blocks_last;
486 : :
487 : : /* The depth of this scope. Used to keep the ->shadowed chain of
488 : : bindings sorted innermost to outermost. */
489 : : unsigned int depth : 28;
490 : :
491 : : /* True if we are currently filling this scope with parameter
492 : : declarations. */
493 : : BOOL_BITFIELD parm_flag : 1;
494 : :
495 : : /* True if we saw [*] in this scope. Used to give an error messages
496 : : if these appears in a function definition. */
497 : : BOOL_BITFIELD had_vla_unspec : 1;
498 : :
499 : : /* True if we already complained about forward parameter decls
500 : : in this scope. This prevents double warnings on
501 : : foo (int a; int b; ...) */
502 : : BOOL_BITFIELD warned_forward_parm_decls : 1;
503 : :
504 : : /* True if this is the outermost block scope of a function body.
505 : : This scope contains the parameters, the local variables declared
506 : : in the outermost block, and all the labels (except those in
507 : : nested functions, or declared at block scope with __label__). */
508 : : BOOL_BITFIELD function_body : 1;
509 : :
510 : : /* True means make a BLOCK for this scope no matter what. */
511 : : BOOL_BITFIELD keep : 1;
512 : :
513 : : /* True means that an unsuffixed float constant is _Decimal64. */
514 : : BOOL_BITFIELD float_const_decimal64 : 1;
515 : :
516 : : /* True if this scope has any label bindings. This is used to speed
517 : : up searching for labels when popping scopes, particularly since
518 : : labels are normally only found at function scope. */
519 : : BOOL_BITFIELD has_label_bindings : 1;
520 : :
521 : : /* True if we should issue a warning if a goto statement crosses any
522 : : of the bindings. We still need to check the list of bindings to
523 : : find the specific ones we need to warn about. This is true if
524 : : decl_jump_unsafe would return true for any of the bindings. This
525 : : is used to avoid looping over all the bindings unnecessarily. */
526 : : BOOL_BITFIELD has_jump_unsafe_decl : 1;
527 : : };
528 : :
529 : : /* The scope currently in effect. */
530 : :
531 : : static GTY(()) struct c_scope *current_scope;
532 : :
533 : : /* The innermost function scope. Ordinary (not explicitly declared)
534 : : labels, bindings to error_mark_node, and the lazily-created
535 : : bindings of __func__ and its friends get this scope. */
536 : :
537 : : static GTY(()) struct c_scope *current_function_scope;
538 : :
539 : : /* The C file scope. This is reset for each input translation unit. */
540 : :
541 : : static GTY(()) struct c_scope *file_scope;
542 : :
543 : : /* The outermost scope. This is used for all declarations with
544 : : external linkage, and only these, hence the name. */
545 : :
546 : : static GTY(()) struct c_scope *external_scope;
547 : :
548 : : /* A chain of c_scope structures awaiting reuse. */
549 : :
550 : : static GTY((deletable)) struct c_scope *scope_freelist;
551 : :
552 : : /* A chain of c_binding structures awaiting reuse. */
553 : :
554 : : static GTY((deletable)) struct c_binding *binding_freelist;
555 : :
556 : : /* Append VAR to LIST in scope SCOPE. */
557 : : #define SCOPE_LIST_APPEND(scope, list, decl) do { \
558 : : struct c_scope *s_ = (scope); \
559 : : tree d_ = (decl); \
560 : : if (s_->list##_last) \
561 : : BLOCK_CHAIN (s_->list##_last) = d_; \
562 : : else \
563 : : s_->list = d_; \
564 : : s_->list##_last = d_; \
565 : : } while (0)
566 : :
567 : : /* Concatenate FROM in scope FSCOPE onto TO in scope TSCOPE. */
568 : : #define SCOPE_LIST_CONCAT(tscope, to, fscope, from) do { \
569 : : struct c_scope *t_ = (tscope); \
570 : : struct c_scope *f_ = (fscope); \
571 : : if (t_->to##_last) \
572 : : BLOCK_CHAIN (t_->to##_last) = f_->from; \
573 : : else \
574 : : t_->to = f_->from; \
575 : : t_->to##_last = f_->from##_last; \
576 : : } while (0)
577 : :
578 : : /* A c_inline_static structure stores details of a static identifier
579 : : referenced in a definition of a function that may be an inline
580 : : definition if no subsequent declaration of that function uses
581 : : "extern" or does not use "inline". */
582 : :
583 : : struct GTY((chain_next ("%h.next"))) c_inline_static {
584 : : /* The location for a diagnostic. */
585 : : location_t location;
586 : :
587 : : /* The function that may be an inline definition. */
588 : : tree function;
589 : :
590 : : /* The object or function referenced. */
591 : : tree static_decl;
592 : :
593 : : /* What sort of reference this is. */
594 : : enum c_inline_static_type type;
595 : :
596 : : /* The next such structure or NULL. */
597 : : struct c_inline_static *next;
598 : : };
599 : :
600 : : /* List of static identifiers used or referenced in functions that may
601 : : be inline definitions. */
602 : : static GTY(()) struct c_inline_static *c_inline_statics;
603 : :
604 : : /* True means unconditionally make a BLOCK for the next scope pushed. */
605 : :
606 : : static bool keep_next_level_flag;
607 : :
608 : : /* True means the next call to push_scope will be the outermost scope
609 : : of a function body, so do not push a new scope, merely cease
610 : : expecting parameter decls. */
611 : :
612 : : static bool next_is_function_body;
613 : :
614 : : /* A vector of pointers to c_binding structures. */
615 : :
616 : : typedef struct c_binding *c_binding_ptr;
617 : :
618 : : /* Information that we keep for a struct or union while it is being
619 : : parsed. */
620 : :
621 : 1072866 : class c_struct_parse_info
622 : : {
623 : : public:
624 : : /* If warn_cxx_compat, a list of types defined within this
625 : : struct. */
626 : : auto_vec<tree> struct_types;
627 : : /* If warn_cxx_compat, a list of field names which have bindings,
628 : : and which are defined in this struct, but which are not defined
629 : : in any enclosing struct. This is used to clear the in_struct
630 : : field of the c_bindings structure. */
631 : : auto_vec<c_binding_ptr> fields;
632 : : /* If warn_cxx_compat, a list of typedef names used when defining
633 : : fields in this struct. */
634 : : auto_vec<tree> typedefs_seen;
635 : : };
636 : :
637 : :
638 : : /* Hash table for structs and unions. */
639 : : struct c_struct_hasher : ggc_ptr_hash<tree_node>
640 : : {
641 : : static hashval_t hash (tree t);
642 : : static bool equal (tree, tree);
643 : : };
644 : :
645 : : /* Hash an RECORD OR UNION. */
646 : : hashval_t
647 : 1407 : c_struct_hasher::hash (tree type)
648 : : {
649 : 1407 : inchash::hash hstate;
650 : :
651 : 1407 : hstate.add_int (TREE_CODE (type));
652 : 1407 : hstate.add_object (TYPE_NAME (type));
653 : :
654 : 1407 : return hstate.end ();
655 : : }
656 : :
657 : : /* Compare two RECORD or UNION types. */
658 : : bool
659 : 1128 : c_struct_hasher::equal (tree t1, tree t2)
660 : : {
661 : 1128 : return comptypes_equiv_p (t1, t2);
662 : : }
663 : :
664 : : /* All tagged typed so that TYPE_CANONICAL can be set correctly. */
665 : : static GTY (()) hash_table<c_struct_hasher> *c_struct_htab;
666 : :
667 : : /* Information for the struct or union currently being parsed, or
668 : : NULL if not parsing a struct or union. */
669 : : static class c_struct_parse_info *struct_parse_info;
670 : :
671 : : /* Forward declarations. */
672 : : static tree lookup_name_in_scope (tree, struct c_scope *);
673 : : static tree c_make_fname_decl (location_t, tree, int);
674 : : static tree grokdeclarator (const struct c_declarator *,
675 : : struct c_declspecs *,
676 : : enum decl_context, bool, tree *, tree *, tree *,
677 : : bool *, enum deprecated_states);
678 : : static tree grokparms (struct c_arg_info *, bool);
679 : : static void layout_array_type (tree);
680 : : static const char *header_for_builtin_fn (tree);
681 : :
682 : : /* T is a statement. Add it to the statement-tree. This is the
683 : : C/ObjC version--C++ has a slightly different version of this
684 : : function. */
685 : :
686 : : tree
687 : 83885188 : add_stmt (tree t)
688 : : {
689 : 83885188 : enum tree_code code = TREE_CODE (t);
690 : :
691 : 83885188 : if (CAN_HAVE_LOCATION_P (t) && code != LABEL_EXPR)
692 : : {
693 : 83223280 : if (!EXPR_HAS_LOCATION (t))
694 : 153709 : SET_EXPR_LOCATION (t, input_location);
695 : : }
696 : :
697 : 83885188 : if (code == LABEL_EXPR || code == CASE_LABEL_EXPR)
698 : 1069503 : STATEMENT_LIST_HAS_LABEL (cur_stmt_list) = 1;
699 : :
700 : : /* Add T to the statement-tree. Non-side-effect statements need to be
701 : : recorded during statement expressions. */
702 : 83885188 : if (!building_stmt_list_p ())
703 : 1 : push_stmt_list ();
704 : 83885188 : append_to_statement_list_force (t, &cur_stmt_list);
705 : :
706 : 83885188 : return t;
707 : : }
708 : :
709 : : /* Build a pointer type using the default pointer mode. */
710 : :
711 : : static tree
712 : 17015106 : c_build_pointer_type (tree to_type)
713 : : {
714 : 17015106 : addr_space_t as = to_type == error_mark_node? ADDR_SPACE_GENERIC
715 : 17015106 : : TYPE_ADDR_SPACE (to_type);
716 : 17015106 : machine_mode pointer_mode;
717 : :
718 : 17015106 : if (as != ADDR_SPACE_GENERIC || c_default_pointer_mode == VOIDmode)
719 : 17015106 : pointer_mode = targetm.addr_space.pointer_mode (as);
720 : : else
721 : : pointer_mode = c_default_pointer_mode;
722 : 17015106 : return build_pointer_type_for_mode (to_type, pointer_mode, false);
723 : : }
724 : :
725 : :
726 : : /* Return true if we will want to say something if a goto statement
727 : : crosses DECL. */
728 : :
729 : : static bool
730 : 807501413 : decl_jump_unsafe (tree decl)
731 : : {
732 : 807501413 : if (error_operand_p (decl))
733 : : return false;
734 : :
735 : : /* Don't warn for compound literals. If a goto statement crosses
736 : : their initialization, it should cross also all the places where
737 : : the complit is used or where the complit address might be saved
738 : : into some variable, so code after the label to which goto jumps
739 : : should not be able to refer to the compound literal. */
740 : 807499232 : if (VAR_P (decl) && C_DECL_COMPOUND_LITERAL_P (decl))
741 : : return false;
742 : :
743 : 806630285 : if (flag_openmp
744 : 9630268 : && VAR_P (decl)
745 : 806657759 : && lookup_attribute ("omp allocate", DECL_ATTRIBUTES (decl)))
746 : : return true;
747 : :
748 : : /* Always warn about crossing variably modified types. */
749 : 796831470 : if ((VAR_P (decl) || TREE_CODE (decl) == TYPE_DECL)
750 : 817874385 : && c_type_variably_modified_p (TREE_TYPE (decl)))
751 : : return true;
752 : :
753 : : /* Otherwise, only warn if -Wgoto-misses-init and this is an
754 : : initialized automatic decl. */
755 : 806590246 : if (warn_jump_misses_init
756 : : && VAR_P (decl)
757 : 13137 : && !TREE_STATIC (decl)
758 : 806590268 : && DECL_INITIAL (decl) != NULL_TREE)
759 : : return true;
760 : :
761 : : return false;
762 : : }
763 : :
764 : :
765 : : void
766 : 0 : c_print_identifier (FILE *file, tree node, int indent)
767 : : {
768 : 0 : void (*save) (enum c_oracle_request, tree identifier);
769 : :
770 : : /* Temporarily hide any binding oracle. Without this, calls to
771 : : debug_tree from the debugger will end up calling into the oracle,
772 : : making for a confusing debug session. As the oracle isn't needed
773 : : here for normal operation, it's simplest to suppress it. */
774 : 0 : save = c_binding_oracle;
775 : 0 : c_binding_oracle = NULL;
776 : :
777 : 0 : print_node (file, "symbol", I_SYMBOL_DECL (node), indent + 4);
778 : 0 : print_node (file, "tag", I_TAG_DECL (node), indent + 4);
779 : 0 : print_node (file, "label", I_LABEL_DECL (node), indent + 4);
780 : 0 : if (C_IS_RESERVED_WORD (node) && C_RID_CODE (node) != RID_CXX_COMPAT_WARN)
781 : : {
782 : 0 : tree rid = ridpointers[C_RID_CODE (node)];
783 : 0 : indent_to (file, indent + 4);
784 : 0 : fprintf (file, "rid " HOST_PTR_PRINTF " \"%s\"",
785 : 0 : (void *) rid, IDENTIFIER_POINTER (rid));
786 : : }
787 : :
788 : 0 : c_binding_oracle = save;
789 : 0 : }
790 : :
791 : : /* Establish that the scope contains declarations that are sensitive to
792 : : jumps that cross a binding. Together with decl_jump_unsafe, this is
793 : : used to diagnose such jumps. */
794 : : void
795 : 57 : c_mark_decl_jump_unsafe_in_current_scope ()
796 : : {
797 : 57 : current_scope->has_jump_unsafe_decl = 1;
798 : 57 : }
799 : :
800 : : /* Establish a binding between NAME, an IDENTIFIER_NODE, and DECL,
801 : : which may be any of several kinds of DECL or TYPE or error_mark_node,
802 : : in the scope SCOPE. */
803 : : static void
804 : 807352423 : bind (tree name, tree decl, struct c_scope *scope, bool invisible,
805 : : bool nested, location_t locus)
806 : : {
807 : 807352423 : struct c_binding *b, **here;
808 : :
809 : 807352423 : if (binding_freelist)
810 : : {
811 : 202562435 : b = binding_freelist;
812 : 202562435 : binding_freelist = b->prev;
813 : : }
814 : : else
815 : 604789988 : b = ggc_alloc<c_binding> ();
816 : :
817 : 807352423 : b->shadowed = 0;
818 : 807352423 : b->decl = decl;
819 : 807352423 : b->id = name;
820 : 807352423 : b->depth = scope->depth;
821 : 807352423 : b->invisible = invisible;
822 : 807352423 : b->nested = nested;
823 : 807352423 : b->inner_comp = 0;
824 : 807352423 : b->in_struct = 0;
825 : 807352423 : b->locus = locus;
826 : :
827 : 807352423 : b->u.type = NULL;
828 : :
829 : 807352423 : b->prev = scope->bindings;
830 : 807352423 : scope->bindings = b;
831 : :
832 : 807352423 : if (decl_jump_unsafe (decl))
833 : 19941 : scope->has_jump_unsafe_decl = 1;
834 : :
835 : 807352423 : if (!name)
836 : : return;
837 : :
838 : 799536609 : switch (TREE_CODE (decl))
839 : : {
840 : 22645 : case LABEL_DECL: here = &I_LABEL_BINDING (name); break;
841 : 586148 : case ENUMERAL_TYPE:
842 : 586148 : case UNION_TYPE:
843 : 586148 : case RECORD_TYPE: here = &I_TAG_BINDING (name); break;
844 : 798927816 : case VAR_DECL:
845 : 798927816 : case FUNCTION_DECL:
846 : 798927816 : case TYPE_DECL:
847 : 798927816 : case CONST_DECL:
848 : 798927816 : case PARM_DECL:
849 : 798927816 : case ERROR_MARK: here = &I_SYMBOL_BINDING (name); break;
850 : :
851 : 0 : default:
852 : 0 : gcc_unreachable ();
853 : : }
854 : :
855 : : /* Locate the appropriate place in the chain of shadowed decls
856 : : to insert this binding. Normally, scope == current_scope and
857 : : this does nothing. */
858 : 799536649 : while (*here && (*here)->depth > scope->depth)
859 : 40 : here = &(*here)->shadowed;
860 : :
861 : 799536609 : b->shadowed = *here;
862 : 799536609 : *here = b;
863 : : }
864 : :
865 : : /* Clear the binding structure B, stick it on the binding_freelist,
866 : : and return the former value of b->prev. This is used by pop_scope
867 : : and get_parm_info to iterate destructively over all the bindings
868 : : from a given scope. */
869 : : static struct c_binding *
870 : 793315436 : free_binding_and_advance (struct c_binding *b)
871 : : {
872 : 793315436 : struct c_binding *prev = b->prev;
873 : :
874 : 793315436 : memset (b, 0, sizeof (struct c_binding));
875 : 793315436 : b->prev = binding_freelist;
876 : 793315436 : binding_freelist = b;
877 : :
878 : 793315436 : return prev;
879 : : }
880 : :
881 : : /* Bind a label. Like bind, but skip fields which aren't used for
882 : : labels, and add the LABEL_VARS value. */
883 : : static void
884 : 22645 : bind_label (tree name, tree label, struct c_scope *scope,
885 : : struct c_label_vars *label_vars)
886 : : {
887 : 22645 : struct c_binding *b;
888 : :
889 : 22645 : bind (name, label, scope, /*invisible=*/false, /*nested=*/false,
890 : : UNKNOWN_LOCATION);
891 : :
892 : 22645 : scope->has_label_bindings = true;
893 : :
894 : 22645 : b = scope->bindings;
895 : 22645 : gcc_assert (b->decl == label);
896 : 22645 : label_vars->shadowed = b->u.label;
897 : 22645 : b->u.label = label_vars;
898 : 22645 : }
899 : :
900 : : /* Hook called at end of compilation to assume 1 elt
901 : : for a file-scope tentative array defn that wasn't complete before. */
902 : :
903 : : void
904 : 7391 : c_finish_incomplete_decl (tree decl)
905 : : {
906 : 7391 : if (VAR_P (decl))
907 : : {
908 : 7391 : tree type = TREE_TYPE (decl);
909 : 7391 : if (type != error_mark_node
910 : 7317 : && TREE_CODE (type) == ARRAY_TYPE
911 : 7155 : && !DECL_EXTERNAL (decl)
912 : 7469 : && TYPE_DOMAIN (type) == NULL_TREE)
913 : : {
914 : 78 : warning_at (DECL_SOURCE_LOCATION (decl),
915 : : 0, "array %q+D assumed to have one element", decl);
916 : :
917 : 78 : complete_array_type (&TREE_TYPE (decl), NULL_TREE, true);
918 : :
919 : 78 : relayout_decl (decl);
920 : : }
921 : : }
922 : 7391 : }
923 : :
924 : : /* Record that inline function FUNC contains a reference (location
925 : : LOC) to static DECL (file-scope or function-local according to
926 : : TYPE). */
927 : :
928 : : void
929 : 36 : record_inline_static (location_t loc, tree func, tree decl,
930 : : enum c_inline_static_type type)
931 : : {
932 : 36 : c_inline_static *csi = ggc_alloc<c_inline_static> ();
933 : 36 : csi->location = loc;
934 : 36 : csi->function = func;
935 : 36 : csi->static_decl = decl;
936 : 36 : csi->type = type;
937 : 36 : csi->next = c_inline_statics;
938 : 36 : c_inline_statics = csi;
939 : 36 : }
940 : :
941 : : /* Check for references to static declarations in inline functions at
942 : : the end of the translation unit and diagnose them if the functions
943 : : are still inline definitions. */
944 : :
945 : : static void
946 : 103411 : check_inline_statics (void)
947 : : {
948 : 103411 : struct c_inline_static *csi;
949 : 103447 : for (csi = c_inline_statics; csi; csi = csi->next)
950 : : {
951 : 36 : if (DECL_EXTERNAL (csi->function))
952 : 30 : switch (csi->type)
953 : : {
954 : 23 : case csi_internal:
955 : 23 : pedwarn (csi->location, 0,
956 : : "%qD is static but used in inline function %qD "
957 : : "which is not static", csi->static_decl, csi->function);
958 : 23 : break;
959 : 7 : case csi_modifiable:
960 : 7 : pedwarn (csi->location, 0,
961 : : "%q+D is static but declared in inline function %qD "
962 : : "which is not static", csi->static_decl, csi->function);
963 : 7 : break;
964 : 0 : default:
965 : 0 : gcc_unreachable ();
966 : : }
967 : : }
968 : 103411 : c_inline_statics = NULL;
969 : 103411 : }
970 : :
971 : : /* Fill in a c_spot_bindings structure. If DEFINING is true, set it
972 : : for the current state, otherwise set it to uninitialized. */
973 : :
974 : : static void
975 : 131129 : set_spot_bindings (struct c_spot_bindings *p, bool defining)
976 : : {
977 : 0 : if (defining)
978 : : {
979 : 124615 : p->scope = current_scope;
980 : 16131 : p->bindings_in_scope = current_scope->bindings;
981 : : }
982 : : else
983 : : {
984 : 6514 : p->scope = NULL;
985 : 6514 : p->bindings_in_scope = NULL;
986 : : }
987 : 131129 : p->stmt_exprs = 0;
988 : 131129 : p->left_stmt_expr = false;
989 : 0 : }
990 : :
991 : : /* Update spot bindings P as we pop out of SCOPE. Return true if we
992 : : should push decls for a label. */
993 : :
994 : : static bool
995 : 470575492 : update_spot_bindings (struct c_scope *scope, struct c_spot_bindings *p)
996 : : {
997 : 0 : if (p->scope != scope)
998 : : {
999 : : /* This label or goto is defined in some other scope, or it is a
1000 : : label which is not yet defined. There is nothing to
1001 : : update. */
1002 : : return false;
1003 : : }
1004 : :
1005 : : /* Adjust the spot bindings to refer to the bindings already defined
1006 : : in the enclosing scope. */
1007 : 198600 : p->scope = scope->outer;
1008 : 198600 : p->bindings_in_scope = p->scope->bindings;
1009 : :
1010 : 148566 : return true;
1011 : : }
1012 : :
1013 : : /* The Objective-C front-end often needs to determine the current scope. */
1014 : :
1015 : : void *
1016 : 0 : objc_get_current_scope (void)
1017 : : {
1018 : 0 : return current_scope;
1019 : : }
1020 : :
1021 : : /* The following function is used only by Objective-C. It needs to live here
1022 : : because it accesses the innards of c_scope. */
1023 : :
1024 : : void
1025 : 0 : objc_mark_locals_volatile (void *enclosing_blk)
1026 : : {
1027 : 0 : struct c_scope *scope;
1028 : 0 : struct c_binding *b;
1029 : :
1030 : 0 : for (scope = current_scope;
1031 : 0 : scope && scope != enclosing_blk;
1032 : 0 : scope = scope->outer)
1033 : : {
1034 : 0 : for (b = scope->bindings; b; b = b->prev)
1035 : 0 : objc_volatilize_decl (b->decl);
1036 : :
1037 : : /* Do not climb up past the current function. */
1038 : 0 : if (scope->function_body)
1039 : : break;
1040 : : }
1041 : 0 : }
1042 : :
1043 : : /* Return true if we are in the global binding level. */
1044 : :
1045 : : bool
1046 : 2025635 : global_bindings_p (void)
1047 : : {
1048 : 2025635 : return current_scope == file_scope;
1049 : : }
1050 : :
1051 : : /* Return true if we're declaring parameters in an old-style function
1052 : : declaration. */
1053 : :
1054 : : bool
1055 : 33064 : old_style_parameter_scope (void)
1056 : : {
1057 : : /* If processing parameters and there is no function statement list, we
1058 : : * have an old-style function declaration. */
1059 : 33064 : return (current_scope->parm_flag && !DECL_SAVED_TREE (current_function_decl));
1060 : : }
1061 : :
1062 : : void
1063 : 49550 : keep_next_level (void)
1064 : : {
1065 : 49550 : keep_next_level_flag = true;
1066 : 49550 : }
1067 : :
1068 : : /* Set the flag for the FLOAT_CONST_DECIMAL64 pragma being ON. */
1069 : :
1070 : : void
1071 : 20 : set_float_const_decimal64 (void)
1072 : : {
1073 : 20 : current_scope->float_const_decimal64 = true;
1074 : 20 : }
1075 : :
1076 : : /* Clear the flag for the FLOAT_CONST_DECIMAL64 pragma. */
1077 : :
1078 : : void
1079 : 28 : clear_float_const_decimal64 (void)
1080 : : {
1081 : 28 : current_scope->float_const_decimal64 = false;
1082 : 28 : }
1083 : :
1084 : : /* Return nonzero if an unsuffixed float constant is _Decimal64. */
1085 : :
1086 : : bool
1087 : 586571 : float_const_decimal64_p (void)
1088 : : {
1089 : 586571 : return current_scope->float_const_decimal64;
1090 : : }
1091 : :
1092 : : /* Identify this scope as currently being filled with parameters. */
1093 : :
1094 : : void
1095 : 75604200 : declare_parm_level (void)
1096 : : {
1097 : 75604200 : current_scope->parm_flag = true;
1098 : 75604200 : }
1099 : :
1100 : : void
1101 : 112140921 : push_scope (void)
1102 : : {
1103 : 112140921 : if (next_is_function_body)
1104 : : {
1105 : : /* This is the transition from the parameters to the top level
1106 : : of the function body. These are the same scope
1107 : : (C99 6.2.1p4,6) so we do not push another scope structure.
1108 : : next_is_function_body is set only by store_parm_decls, which
1109 : : in turn is called when and only when we are about to
1110 : : encounter the opening curly brace for the function body.
1111 : :
1112 : : The outermost block of a function always gets a BLOCK node,
1113 : : because the debugging output routines expect that each
1114 : : function has at least one BLOCK. */
1115 : 31761899 : current_scope->parm_flag = false;
1116 : 31761899 : current_scope->function_body = true;
1117 : 31761899 : current_scope->keep = true;
1118 : 31761899 : current_scope->outer_function = current_function_scope;
1119 : 31761899 : current_function_scope = current_scope;
1120 : :
1121 : 31761899 : keep_next_level_flag = false;
1122 : 31761899 : next_is_function_body = false;
1123 : :
1124 : : /* The FLOAT_CONST_DECIMAL64 pragma applies to nested scopes. */
1125 : 31761899 : if (current_scope->outer)
1126 : 31761899 : current_scope->float_const_decimal64
1127 : 31761899 : = current_scope->outer->float_const_decimal64;
1128 : : else
1129 : 0 : current_scope->float_const_decimal64 = false;
1130 : : }
1131 : : else
1132 : : {
1133 : 80379022 : struct c_scope *scope;
1134 : 80379022 : if (scope_freelist)
1135 : : {
1136 : 79561408 : scope = scope_freelist;
1137 : 79561408 : scope_freelist = scope->outer;
1138 : : }
1139 : : else
1140 : 817614 : scope = ggc_cleared_alloc<c_scope> ();
1141 : :
1142 : : /* The FLOAT_CONST_DECIMAL64 pragma applies to nested scopes. */
1143 : 80379022 : if (current_scope)
1144 : 80271044 : scope->float_const_decimal64 = current_scope->float_const_decimal64;
1145 : : else
1146 : 107978 : scope->float_const_decimal64 = false;
1147 : :
1148 : 80379022 : scope->keep = keep_next_level_flag;
1149 : 80379022 : scope->outer = current_scope;
1150 : 80379022 : scope->depth = current_scope ? (current_scope->depth + 1) : 0;
1151 : :
1152 : : /* Check for scope depth overflow. Unlikely (2^28 == 268,435,456) but
1153 : : possible. */
1154 : 80379022 : if (current_scope && scope->depth == 0)
1155 : : {
1156 : 0 : scope->depth--;
1157 : 0 : sorry ("GCC supports only %u nested scopes", scope->depth);
1158 : : }
1159 : :
1160 : 80379022 : current_scope = scope;
1161 : 80379022 : keep_next_level_flag = false;
1162 : : }
1163 : 112140921 : }
1164 : :
1165 : : /* This is called when we are leaving SCOPE. For each label defined
1166 : : in SCOPE, add any appropriate decls to its decls_in_scope fields.
1167 : : These are the decls whose initialization will be skipped by a goto
1168 : : later in the function. */
1169 : :
1170 : : static void
1171 : 80373585 : update_label_decls (struct c_scope *scope)
1172 : : {
1173 : 80373585 : struct c_scope *s;
1174 : :
1175 : 80373585 : s = scope;
1176 : 300808268 : while (s != NULL)
1177 : : {
1178 : 256775117 : if (s->has_label_bindings)
1179 : : {
1180 : 228132 : struct c_binding *b;
1181 : :
1182 : 2099401 : for (b = s->bindings; b != NULL; b = b->prev)
1183 : : {
1184 : 1871269 : struct c_label_vars *label_vars;
1185 : 1871269 : struct c_binding *b1;
1186 : 1871269 : bool hjud;
1187 : 1871269 : unsigned int ix;
1188 : 1871269 : struct c_goto_bindings *g;
1189 : :
1190 : 1871269 : if (TREE_CODE (b->decl) != LABEL_DECL)
1191 : 1398548 : continue;
1192 : 472721 : label_vars = b->u.label;
1193 : :
1194 : 472721 : b1 = label_vars->label_bindings.bindings_in_scope;
1195 : 472721 : if (label_vars->label_bindings.scope == NULL)
1196 : : hjud = false;
1197 : : else
1198 : 167558 : hjud = label_vars->label_bindings.scope->has_jump_unsafe_decl;
1199 : 472721 : if (update_spot_bindings (scope, &label_vars->label_bindings))
1200 : : {
1201 : : /* This label is defined in this scope. */
1202 : 50034 : if (hjud)
1203 : : {
1204 : 169525 : for (; b1 != NULL; b1 = b1->prev)
1205 : : {
1206 : : /* A goto from later in the function to this
1207 : : label will never see the initialization
1208 : : of B1, if any. Save it to issue a
1209 : : warning if needed. */
1210 : 148129 : if (decl_jump_unsafe (b1->decl))
1211 : 19418 : vec_safe_push(label_vars->decls_in_scope, b1->decl);
1212 : : }
1213 : : }
1214 : : }
1215 : :
1216 : : /* Update the bindings of any goto statements associated
1217 : : with this label. */
1218 : 472262934 : FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g)
1219 : 470251337 : update_spot_bindings (scope, &g->goto_bindings);
1220 : : }
1221 : : }
1222 : :
1223 : : /* Don't search beyond the current function. */
1224 : 256775117 : if (s == current_function_scope)
1225 : : break;
1226 : :
1227 : 220434683 : s = s->outer;
1228 : : }
1229 : 80373585 : }
1230 : :
1231 : : /* Exit a scope. Restore the state of the identifier-decl mappings
1232 : : that were in effect when this scope was entered. Return a BLOCK
1233 : : node containing all the DECLs in this scope that are of interest
1234 : : to debug info generation. */
1235 : :
1236 : : tree
1237 : 80373585 : pop_scope (void)
1238 : : {
1239 : 80373585 : struct c_scope *scope = current_scope;
1240 : 80373585 : tree block, context, p;
1241 : 80373585 : struct c_binding *b;
1242 : :
1243 : 80373585 : bool functionbody = scope->function_body;
1244 : 80373585 : bool keep = functionbody || scope->keep || scope->bindings;
1245 : :
1246 : 80373585 : update_label_decls (scope);
1247 : :
1248 : : /* If appropriate, create a BLOCK to record the decls for the life
1249 : : of this function. */
1250 : 80373585 : block = NULL_TREE;
1251 : 80373585 : if (keep)
1252 : : {
1253 : 32227772 : block = make_node (BLOCK);
1254 : 32227772 : BLOCK_SUBBLOCKS (block) = scope->blocks;
1255 : 32227772 : TREE_USED (block) = 1;
1256 : :
1257 : : /* In each subblock, record that this is its superior. */
1258 : 32487546 : for (p = scope->blocks; p; p = BLOCK_CHAIN (p))
1259 : 259774 : BLOCK_SUPERCONTEXT (p) = block;
1260 : :
1261 : 32227772 : BLOCK_VARS (block) = NULL_TREE;
1262 : : }
1263 : :
1264 : : /* The TYPE_CONTEXTs for all of the tagged types belonging to this
1265 : : scope must be set so that they point to the appropriate
1266 : : construct, i.e. either to the current FUNCTION_DECL node, or
1267 : : else to the BLOCK node we just constructed.
1268 : :
1269 : : Note that for tagged types whose scope is just the formal
1270 : : parameter list for some function type specification, we can't
1271 : : properly set their TYPE_CONTEXTs here, because we don't have a
1272 : : pointer to the appropriate FUNCTION_TYPE node readily available
1273 : : to us. For those cases, the TYPE_CONTEXTs of the relevant tagged
1274 : : type nodes get set in `grokdeclarator' as soon as we have created
1275 : : the FUNCTION_TYPE node which will represent the "scope" for these
1276 : : "parameter list local" tagged types. */
1277 : 80373585 : if (scope->function_body)
1278 : 31761898 : context = current_function_decl;
1279 : 48611687 : else if (scope == file_scope)
1280 : : {
1281 : 103050 : tree file_decl
1282 : 103050 : = build_translation_unit_decl (get_identifier (main_input_filename));
1283 : 103050 : context = file_decl;
1284 : 103050 : debug_hooks->register_main_translation_unit (file_decl);
1285 : : }
1286 : : else
1287 : : context = block;
1288 : :
1289 : : /* Clear all bindings in this scope. */
1290 : 766107516 : for (b = scope->bindings; b; b = free_binding_and_advance (b))
1291 : : {
1292 : 685733931 : p = b->decl;
1293 : 685733931 : switch (TREE_CODE (p))
1294 : : {
1295 : 22645 : case LABEL_DECL:
1296 : : /* Warnings for unused labels, errors for undefined labels. */
1297 : 22645 : if (TREE_USED (p) && !DECL_INITIAL (p))
1298 : : {
1299 : 63 : error ("label %q+D used but not defined", p);
1300 : 63 : DECL_INITIAL (p) = error_mark_node;
1301 : : }
1302 : : else
1303 : 22582 : warn_for_unused_label (p);
1304 : :
1305 : : /* Labels go in BLOCK_VARS. */
1306 : 22645 : DECL_CHAIN (p) = BLOCK_VARS (block);
1307 : 22645 : BLOCK_VARS (block) = p;
1308 : 22645 : gcc_assert (I_LABEL_BINDING (b->id) == b);
1309 : 22645 : I_LABEL_BINDING (b->id) = b->shadowed;
1310 : :
1311 : : /* Also pop back to the shadowed label_vars. */
1312 : 22645 : release_tree_vector (b->u.label->decls_in_scope);
1313 : 22645 : b->u.label = b->u.label->shadowed;
1314 : 22645 : break;
1315 : :
1316 : 1292546 : case ENUMERAL_TYPE:
1317 : 1292546 : case UNION_TYPE:
1318 : 1292546 : case RECORD_TYPE:
1319 : :
1320 : : /* Types may not have tag-names, in which case the type
1321 : : appears in the bindings list with b->id NULL. */
1322 : 1292546 : if (b->id)
1323 : : {
1324 : 584330 : gcc_assert (I_TAG_BINDING (b->id) == b);
1325 : 584330 : I_TAG_BINDING (b->id) = b->shadowed;
1326 : : }
1327 : : break;
1328 : :
1329 : 569599029 : case FUNCTION_DECL:
1330 : : /* Propagate TREE_ADDRESSABLE from nested functions to their
1331 : : containing functions. */
1332 : 569599029 : if (!TREE_ASM_WRITTEN (p)
1333 : 569599029 : && DECL_INITIAL (p) != NULL_TREE
1334 : 63190815 : && TREE_ADDRESSABLE (p)
1335 : 3432881 : && DECL_ABSTRACT_ORIGIN (p) != NULL_TREE
1336 : 569599029 : && DECL_ABSTRACT_ORIGIN (p) != p)
1337 : 0 : TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (p)) = 1;
1338 : 569599029 : if (!TREE_PUBLIC (p)
1339 : 340438 : && !DECL_INITIAL (p)
1340 : 146 : && !b->nested
1341 : 115 : && scope != file_scope
1342 : 569599035 : && scope != external_scope)
1343 : : {
1344 : 6 : error ("nested function %q+D declared but never defined", p);
1345 : 6 : undef_nested_function = true;
1346 : : }
1347 : 569599023 : else if (DECL_DECLARED_INLINE_P (p)
1348 : 62057722 : && TREE_PUBLIC (p)
1349 : 631507015 : && !DECL_INITIAL (p))
1350 : : {
1351 : : /* C99 6.7.4p6: "a function with external linkage... declared
1352 : : with an inline function specifier ... shall also be defined
1353 : : in the same translation unit." */
1354 : 72 : if (!flag_gnu89_inline
1355 : 47 : && !lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (p))
1356 : 103 : && scope == external_scope)
1357 : 11 : pedwarn (input_location, 0,
1358 : : "inline function %q+D declared but never defined", p);
1359 : 72 : DECL_EXTERNAL (p) = 1;
1360 : : }
1361 : :
1362 : 569599029 : goto common_symbol;
1363 : :
1364 : 10659596 : case VAR_DECL:
1365 : : /* Warnings for unused variables. */
1366 : 8104754 : if ((!TREE_USED (p) || !DECL_READ_P (p))
1367 : 2581428 : && !warning_suppressed_p (p, OPT_Wunused_but_set_variable)
1368 : 2580934 : && !DECL_IN_SYSTEM_HEADER (p)
1369 : 2505151 : && DECL_NAME (p)
1370 : 2505151 : && !DECL_ARTIFICIAL (p)
1371 : 2504837 : && scope != file_scope
1372 : 12279779 : && scope != external_scope)
1373 : : {
1374 : 737106 : if (!TREE_USED (p))
1375 : : {
1376 : 732029 : warning (OPT_Wunused_variable, "unused variable %q+D", p);
1377 : 732029 : suppress_warning (p, OPT_Wunused_variable);
1378 : : }
1379 : 5077 : else if (DECL_CONTEXT (p) == current_function_decl)
1380 : 5058 : warning_at (DECL_SOURCE_LOCATION (p),
1381 : : OPT_Wunused_but_set_variable,
1382 : : "variable %qD set but not used", p);
1383 : : }
1384 : :
1385 : 10659596 : if (b->inner_comp)
1386 : : {
1387 : 2 : error ("type of array %q+D completed incompatibly with"
1388 : : " implicit initialization", p);
1389 : : }
1390 : :
1391 : : /* Fall through. */
1392 : 596518463 : case TYPE_DECL:
1393 : 596518463 : case CONST_DECL:
1394 : 10659594 : common_symbol:
1395 : : /* All of these go in BLOCK_VARS, but only if this is the
1396 : : binding in the home scope. */
1397 : 596518463 : if (!b->nested)
1398 : : {
1399 : 359186683 : DECL_CHAIN (p) = BLOCK_VARS (block);
1400 : 359186683 : BLOCK_VARS (block) = p;
1401 : : }
1402 : 237331780 : else if (VAR_OR_FUNCTION_DECL_P (p) && scope != file_scope)
1403 : : {
1404 : : /* For block local externs add a special
1405 : : DECL_EXTERNAL decl for debug info generation. */
1406 : 14557 : tree extp = copy_node (p);
1407 : :
1408 : 14557 : DECL_EXTERNAL (extp) = 1;
1409 : 14557 : TREE_STATIC (extp) = 0;
1410 : 14557 : TREE_PUBLIC (extp) = 1;
1411 : 14557 : DECL_INITIAL (extp) = NULL_TREE;
1412 : 14557 : DECL_LANG_SPECIFIC (extp) = NULL;
1413 : 14557 : DECL_CONTEXT (extp) = current_function_decl;
1414 : 14557 : if (TREE_CODE (p) == FUNCTION_DECL)
1415 : : {
1416 : 13027 : DECL_RESULT (extp) = NULL_TREE;
1417 : 13027 : DECL_SAVED_TREE (extp) = NULL_TREE;
1418 : 13027 : DECL_STRUCT_FUNCTION (extp) = NULL;
1419 : : }
1420 : 14557 : if (b->locus != UNKNOWN_LOCATION)
1421 : 14557 : DECL_SOURCE_LOCATION (extp) = b->locus;
1422 : 14557 : DECL_CHAIN (extp) = BLOCK_VARS (block);
1423 : 14557 : BLOCK_VARS (block) = extp;
1424 : : }
1425 : : /* If this is the file scope set DECL_CONTEXT of each decl to
1426 : : the TRANSLATION_UNIT_DECL. This makes same_translation_unit_p
1427 : : work. */
1428 : 596518463 : if (scope == file_scope)
1429 : 247832600 : DECL_CONTEXT (p) = context;
1430 : :
1431 : 684418740 : gcc_fallthrough ();
1432 : : /* Parameters go in DECL_ARGUMENTS, not BLOCK_VARS, and have
1433 : : already been put there by store_parm_decls. Unused-
1434 : : parameter warnings are handled by function.cc.
1435 : : error_mark_node obviously does not go in BLOCK_VARS and
1436 : : does not get unused-variable warnings. */
1437 : 684418740 : case PARM_DECL:
1438 : 684418740 : case ERROR_MARK:
1439 : : /* It is possible for a decl not to have a name. We get
1440 : : here with b->id NULL in this case. */
1441 : 684418740 : if (b->id)
1442 : : {
1443 : 681426273 : gcc_assert (I_SYMBOL_BINDING (b->id) == b);
1444 : 681426273 : I_SYMBOL_BINDING (b->id) = b->shadowed;
1445 : 681426273 : if (b->shadowed && b->shadowed->u.type)
1446 : 3778141 : TREE_TYPE (b->shadowed->decl) = b->shadowed->u.type;
1447 : : }
1448 : : break;
1449 : :
1450 : 0 : default:
1451 : 0 : gcc_unreachable ();
1452 : : }
1453 : : }
1454 : :
1455 : :
1456 : : /* Dispose of the block that we just made inside some higher level. */
1457 : 80373585 : if ((scope->function_body || scope == file_scope) && context)
1458 : : {
1459 : 31864948 : DECL_INITIAL (context) = block;
1460 : 31864948 : BLOCK_SUPERCONTEXT (block) = context;
1461 : : }
1462 : 48508637 : else if (scope->outer)
1463 : : {
1464 : 48405587 : if (block)
1465 : 259774 : SCOPE_LIST_APPEND (scope->outer, blocks, block);
1466 : : /* If we did not make a block for the scope just exited, any
1467 : : blocks made for inner scopes must be carried forward so they
1468 : : will later become subblocks of something else. */
1469 : 48145813 : else if (scope->blocks)
1470 : 332278 : SCOPE_LIST_CONCAT (scope->outer, blocks, scope, blocks);
1471 : : }
1472 : :
1473 : : /* Pop the current scope, and free the structure for reuse. */
1474 : 80373585 : current_scope = scope->outer;
1475 : 80373585 : if (scope->function_body)
1476 : 31761898 : current_function_scope = scope->outer_function;
1477 : :
1478 : 80373585 : memset (scope, 0, sizeof (struct c_scope));
1479 : 80373585 : scope->outer = scope_freelist;
1480 : 80373585 : scope_freelist = scope;
1481 : :
1482 : 80373585 : return block;
1483 : : }
1484 : :
1485 : : void
1486 : 103557 : push_file_scope (void)
1487 : : {
1488 : 103557 : tree decl;
1489 : :
1490 : 103557 : if (file_scope)
1491 : : return;
1492 : :
1493 : 103557 : push_scope ();
1494 : 103557 : file_scope = current_scope;
1495 : :
1496 : 103557 : start_fname_decls ();
1497 : :
1498 : 194310463 : for (decl = visible_builtins; decl; decl = DECL_CHAIN (decl))
1499 : 194206906 : bind (DECL_NAME (decl), decl, file_scope,
1500 : 194206906 : /*invisible=*/false, /*nested=*/true, DECL_SOURCE_LOCATION (decl));
1501 : : }
1502 : :
1503 : : void
1504 : 103411 : pop_file_scope (void)
1505 : : {
1506 : : /* In case there were missing closebraces, get us back to the global
1507 : : binding level. */
1508 : 103411 : while (current_scope != file_scope)
1509 : 0 : pop_scope ();
1510 : :
1511 : : /* __FUNCTION__ is defined at file scope (""). This
1512 : : call may not be necessary as my tests indicate it
1513 : : still works without it. */
1514 : 103411 : finish_fname_decls ();
1515 : :
1516 : 103411 : check_inline_statics ();
1517 : :
1518 : : /* This is the point to write out a PCH if we're doing that.
1519 : : In that case we do not want to do anything else. */
1520 : 103411 : if (pch_file)
1521 : : {
1522 : 361 : c_common_write_pch ();
1523 : : /* Ensure even the callers don't try to finalize the CU. */
1524 : 361 : flag_syntax_only = 1;
1525 : 361 : return;
1526 : : }
1527 : :
1528 : : /* Pop off the file scope and close this translation unit. */
1529 : 103050 : pop_scope ();
1530 : 103050 : file_scope = 0;
1531 : :
1532 : 103050 : maybe_apply_pending_pragma_weaks ();
1533 : : }
1534 : :
1535 : : /* Whether we are curently inside the initializer for an
1536 : : underspecified object definition (C23 auto or constexpr). */
1537 : : static bool in_underspecified_init;
1538 : :
1539 : : /* Start an underspecified object definition for NAME at LOC. This
1540 : : means that NAME is shadowed inside its initializer, so neither the
1541 : : definition being initialized, nor any definition from an outer
1542 : : scope, may be referenced during that initializer. Return state to
1543 : : be passed to finish_underspecified_init. If NAME is NULL_TREE, the
1544 : : underspecified object is a (constexpr) compound literal; there is
1545 : : no shadowing in that case, but all the other restrictions on
1546 : : underspecified object definitions still apply. */
1547 : : unsigned int
1548 : 606 : start_underspecified_init (location_t loc, tree name)
1549 : : {
1550 : 606 : bool prev = in_underspecified_init;
1551 : 606 : bool ok;
1552 : 606 : if (name == NULL_TREE)
1553 : : ok = true;
1554 : : else
1555 : : {
1556 : 374 : tree decl = build_decl (loc, VAR_DECL, name, error_mark_node);
1557 : 374 : C_DECL_UNDERSPECIFIED (decl) = 1;
1558 : 374 : struct c_scope *scope = current_scope;
1559 : 374 : struct c_binding *b = I_SYMBOL_BINDING (name);
1560 : 374 : if (b && B_IN_SCOPE (b, scope))
1561 : : {
1562 : 4 : error_at (loc, "underspecified declaration of %qE, which is already "
1563 : : "declared in this scope", name);
1564 : 4 : ok = false;
1565 : : }
1566 : : else
1567 : : {
1568 : 370 : bind (name, decl, scope, false, false, loc);
1569 : 370 : ok = true;
1570 : : }
1571 : : }
1572 : 606 : in_underspecified_init = true;
1573 : 606 : return ok | (prev << 1);
1574 : : }
1575 : :
1576 : : /* Finish an underspecified object definition for NAME, before that
1577 : : name is bound to the real declaration instead of a placeholder.
1578 : : PREV_STATE is the value returned by the call to
1579 : : start_underspecified_init. If NAME is NULL_TREE, this means a
1580 : : compound literal, as for start_underspecified_init. */
1581 : : void
1582 : 606 : finish_underspecified_init (tree name, unsigned int prev_state)
1583 : : {
1584 : 606 : if (name != NULL_TREE && (prev_state & 1))
1585 : : {
1586 : : /* A VAR_DECL was bound to the name to shadow any previous
1587 : : declarations for the name; remove that binding now. */
1588 : 370 : struct c_scope *scope = current_scope;
1589 : 370 : struct c_binding *b = I_SYMBOL_BINDING (name);
1590 : 370 : gcc_assert (b);
1591 : 370 : gcc_assert (B_IN_SCOPE (b, scope));
1592 : 370 : gcc_assert (VAR_P (b->decl));
1593 : 370 : gcc_assert (C_DECL_UNDERSPECIFIED (b->decl));
1594 : 370 : I_SYMBOL_BINDING (name) = b->shadowed;
1595 : : /* In erroneous cases there may be other bindings added to this
1596 : : scope during the initializer. */
1597 : 370 : struct c_binding **p = &scope->bindings;
1598 : 425 : while (*p != b)
1599 : 55 : p = &((*p)->prev);
1600 : 370 : *p = free_binding_and_advance (*p);
1601 : : }
1602 : 606 : in_underspecified_init = (prev_state & (1u << 1)) >> 1;
1603 : 606 : }
1604 : :
1605 : : /* Adjust the bindings for the start of a statement expression. */
1606 : :
1607 : : void
1608 : 33043 : c_bindings_start_stmt_expr (struct c_spot_bindings* switch_bindings)
1609 : : {
1610 : 33043 : struct c_scope *scope;
1611 : :
1612 : 224950 : for (scope = current_scope; scope != NULL; scope = scope->outer)
1613 : : {
1614 : 191907 : struct c_binding *b;
1615 : :
1616 : 191907 : if (!scope->has_label_bindings)
1617 : 189539 : continue;
1618 : :
1619 : 12410 : for (b = scope->bindings; b != NULL; b = b->prev)
1620 : : {
1621 : 10042 : struct c_label_vars *label_vars;
1622 : 10042 : unsigned int ix;
1623 : 10042 : struct c_goto_bindings *g;
1624 : :
1625 : 10042 : if (TREE_CODE (b->decl) != LABEL_DECL)
1626 : 1434 : continue;
1627 : 8608 : label_vars = b->u.label;
1628 : 8608 : ++label_vars->label_bindings.stmt_exprs;
1629 : 12578 : FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g)
1630 : 1795 : ++g->goto_bindings.stmt_exprs;
1631 : : }
1632 : : }
1633 : :
1634 : 33043 : if (switch_bindings != NULL)
1635 : 148 : ++switch_bindings->stmt_exprs;
1636 : 33043 : }
1637 : :
1638 : : /* Adjust the bindings for the end of a statement expression. */
1639 : :
1640 : : void
1641 : 33043 : c_bindings_end_stmt_expr (struct c_spot_bindings *switch_bindings)
1642 : : {
1643 : 33043 : struct c_scope *scope;
1644 : :
1645 : 191907 : for (scope = current_scope; scope != NULL; scope = scope->outer)
1646 : : {
1647 : 158864 : struct c_binding *b;
1648 : :
1649 : 158864 : if (!scope->has_label_bindings)
1650 : 156262 : continue;
1651 : :
1652 : 15882 : for (b = scope->bindings; b != NULL; b = b->prev)
1653 : : {
1654 : 13280 : struct c_label_vars *label_vars;
1655 : 13280 : unsigned int ix;
1656 : 13280 : struct c_goto_bindings *g;
1657 : :
1658 : 13280 : if (TREE_CODE (b->decl) != LABEL_DECL)
1659 : 1494 : continue;
1660 : 11786 : label_vars = b->u.label;
1661 : 11786 : --label_vars->label_bindings.stmt_exprs;
1662 : 11786 : if (label_vars->label_bindings.stmt_exprs < 0)
1663 : : {
1664 : 3317 : label_vars->label_bindings.left_stmt_expr = true;
1665 : 3317 : label_vars->label_bindings.stmt_exprs = 0;
1666 : : }
1667 : 15808 : FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g)
1668 : : {
1669 : 1791 : --g->goto_bindings.stmt_exprs;
1670 : 1791 : if (g->goto_bindings.stmt_exprs < 0)
1671 : : {
1672 : 128 : g->goto_bindings.left_stmt_expr = true;
1673 : 128 : g->goto_bindings.stmt_exprs = 0;
1674 : : }
1675 : : }
1676 : : }
1677 : : }
1678 : :
1679 : 33043 : if (switch_bindings != NULL)
1680 : : {
1681 : 148 : --switch_bindings->stmt_exprs;
1682 : 148 : gcc_assert (switch_bindings->stmt_exprs >= 0);
1683 : : }
1684 : 33043 : }
1685 : :
1686 : : /* Push a definition or a declaration of struct, union or enum tag "name".
1687 : : "type" should be the type node.
1688 : : We assume that the tag "name" is not already defined, and has a location
1689 : : of LOC.
1690 : :
1691 : : Note that the definition may really be just a forward reference.
1692 : : In that case, the TYPE_SIZE will be zero. */
1693 : :
1694 : : static void
1695 : 1296497 : pushtag (location_t loc, tree name, tree type)
1696 : : {
1697 : : /* Record the identifier as the type's name if it has none. */
1698 : 1296497 : if (name && !TYPE_NAME (type))
1699 : 586127 : TYPE_NAME (type) = name;
1700 : 1296497 : bind (name, type, current_scope, /*invisible=*/false, /*nested=*/false, loc);
1701 : :
1702 : : /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE will be the
1703 : : tagged type we just added to the current scope. This fake
1704 : : NULL-named TYPE_DECL node helps dwarfout.c to know when it needs
1705 : : to output a representation of a tagged type, and it also gives
1706 : : us a convenient place to record the "scope start" address for the
1707 : : tagged type. */
1708 : :
1709 : 1296497 : TYPE_STUB_DECL (type) = pushdecl (build_decl (loc,
1710 : : TYPE_DECL, NULL_TREE, type));
1711 : :
1712 : : /* An approximation for now, so we can tell this is a function-scope tag.
1713 : : This will be updated in pop_scope. */
1714 : 1296497 : TYPE_CONTEXT (type) = DECL_CONTEXT (TYPE_STUB_DECL (type));
1715 : :
1716 : 1296497 : if (warn_cxx_compat && name != NULL_TREE)
1717 : : {
1718 : 506 : struct c_binding *b = I_SYMBOL_BINDING (name);
1719 : :
1720 : 506 : if (b != NULL
1721 : 12 : && b->decl != NULL_TREE
1722 : 12 : && TREE_CODE (b->decl) == TYPE_DECL
1723 : 11 : && (B_IN_CURRENT_SCOPE (b)
1724 : 6 : || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b)))
1725 : 511 : && (TYPE_MAIN_VARIANT (TREE_TYPE (b->decl))
1726 : 5 : != TYPE_MAIN_VARIANT (type)))
1727 : : {
1728 : 5 : auto_diagnostic_group d;
1729 : 5 : if (warning_at (loc, OPT_Wc___compat,
1730 : : ("using %qD as both a typedef and a tag is "
1731 : : "invalid in C++"), b->decl)
1732 : 5 : && b->locus != UNKNOWN_LOCATION)
1733 : 4 : inform (b->locus, "originally defined here");
1734 : 5 : }
1735 : : }
1736 : 1296497 : }
1737 : :
1738 : : /* An exported interface to pushtag. This is used by the gdb plugin's
1739 : : binding oracle to introduce a new tag binding. */
1740 : :
1741 : : void
1742 : 0 : c_pushtag (location_t loc, tree name, tree type)
1743 : : {
1744 : 0 : pushtag (loc, name, type);
1745 : 0 : }
1746 : :
1747 : : /* An exported interface to bind a declaration. LOC is the location
1748 : : to use. DECL is the declaration to bind. The decl's name is used
1749 : : to determine how it is bound. If DECL is a VAR_DECL, then
1750 : : IS_GLOBAL determines whether the decl is put into the global (file
1751 : : and external) scope or the current function's scope; if DECL is not
1752 : : a VAR_DECL then it is always put into the file scope. */
1753 : :
1754 : : void
1755 : 0 : c_bind (location_t loc, tree decl, bool is_global)
1756 : : {
1757 : 0 : struct c_scope *scope;
1758 : 0 : bool nested = false;
1759 : :
1760 : 0 : if (!VAR_P (decl) || current_function_scope == NULL)
1761 : : {
1762 : : /* Types and functions are always considered to be global. */
1763 : 0 : scope = file_scope;
1764 : 0 : DECL_EXTERNAL (decl) = 1;
1765 : 0 : TREE_PUBLIC (decl) = 1;
1766 : : }
1767 : 0 : else if (is_global)
1768 : : {
1769 : : /* Also bind it into the external scope. */
1770 : 0 : bind (DECL_NAME (decl), decl, external_scope, true, false, loc);
1771 : 0 : nested = true;
1772 : 0 : scope = file_scope;
1773 : 0 : DECL_EXTERNAL (decl) = 1;
1774 : 0 : TREE_PUBLIC (decl) = 1;
1775 : : }
1776 : : else
1777 : : {
1778 : 0 : DECL_CONTEXT (decl) = current_function_decl;
1779 : 0 : TREE_PUBLIC (decl) = 0;
1780 : 0 : scope = current_function_scope;
1781 : : }
1782 : :
1783 : 0 : bind (DECL_NAME (decl), decl, scope, false, nested, loc);
1784 : 0 : }
1785 : :
1786 : :
1787 : : /* Stores the first FILE*, const struct tm* etc. argument type (whatever
1788 : : it is) seen in a declaration of a file I/O etc. built-in, corresponding
1789 : : to the builtin_structptr_types array. Subsequent declarations of such
1790 : : built-ins are expected to refer to it rather than to fileptr_type_node,
1791 : : etc. which is just void* (or to any other type).
1792 : : Used only by match_builtin_function_types. */
1793 : :
1794 : : static const unsigned builtin_structptr_type_count
1795 : : = ARRAY_SIZE (builtin_structptr_types);
1796 : :
1797 : : static GTY(()) tree last_structptr_types[builtin_structptr_type_count];
1798 : :
1799 : : /* Returns true if types T1 and T2 representing return types or types
1800 : : of function arguments are close enough to be considered interchangeable
1801 : : in redeclarations of built-in functions. */
1802 : :
1803 : : static bool
1804 : 590918 : types_close_enough_to_match (tree t1, tree t2)
1805 : : {
1806 : 590918 : return (TYPE_MODE (t1) == TYPE_MODE (t2)
1807 : 590605 : && POINTER_TYPE_P (t1) == POINTER_TYPE_P (t2)
1808 : 2362580 : && FUNCTION_POINTER_TYPE_P (t1) == FUNCTION_POINTER_TYPE_P (t2));
1809 : : }
1810 : :
1811 : : /* Subroutine of compare_decls. Allow harmless mismatches in return
1812 : : and argument types provided that the type modes match. Set *STRICT
1813 : : and *ARGNO to the expected argument type and number in case of
1814 : : an argument type mismatch or null and zero otherwise. Return
1815 : : a unified type given a suitable match, and 0 otherwise. */
1816 : :
1817 : : static tree
1818 : 137031 : match_builtin_function_types (tree newtype, tree oldtype,
1819 : : tree *strict, unsigned *argno)
1820 : : {
1821 : 137031 : *argno = 0;
1822 : 137031 : *strict = NULL_TREE;
1823 : :
1824 : : /* Accept the return type of the new declaration if it has the same
1825 : : mode and if they're both pointers or if neither is. */
1826 : 137031 : tree oldrettype = TREE_TYPE (oldtype);
1827 : 137031 : tree newrettype = TREE_TYPE (newtype);
1828 : :
1829 : 137031 : if (!types_close_enough_to_match (oldrettype, newrettype))
1830 : : return NULL_TREE;
1831 : :
1832 : : /* Check that the return types are compatible but don't fail if they
1833 : : are not (e.g., int vs long in ILP32) and just let the caller know. */
1834 : 136690 : if (!comptypes (TYPE_MAIN_VARIANT (oldrettype),
1835 : 136690 : TYPE_MAIN_VARIANT (newrettype)))
1836 : 38 : *strict = oldrettype;
1837 : :
1838 : 136690 : tree oldargs = TYPE_ARG_TYPES (oldtype);
1839 : 136690 : tree newargs = TYPE_ARG_TYPES (newtype);
1840 : 136690 : tree tryargs = newargs;
1841 : :
1842 : 136690 : const unsigned nlst = ARRAY_SIZE (last_structptr_types);
1843 : 136690 : const unsigned nbst = ARRAY_SIZE (builtin_structptr_types);
1844 : :
1845 : 136690 : gcc_checking_assert (nlst == nbst);
1846 : :
1847 : 590501 : for (unsigned i = 1; oldargs || newargs; ++i)
1848 : : {
1849 : 453961 : if (!oldargs
1850 : 453961 : || !newargs
1851 : 453891 : || !TREE_VALUE (oldargs)
1852 : 907852 : || !TREE_VALUE (newargs))
1853 : : return NULL_TREE;
1854 : :
1855 : 453891 : tree oldtype = TYPE_MAIN_VARIANT (TREE_VALUE (oldargs));
1856 : 453891 : tree newtype = TREE_VALUE (newargs);
1857 : 453891 : if (newtype == error_mark_node)
1858 : : return NULL_TREE;
1859 : 453887 : newtype = TYPE_MAIN_VARIANT (newtype);
1860 : :
1861 : 453887 : if (!types_close_enough_to_match (oldtype, newtype))
1862 : : return NULL_TREE;
1863 : :
1864 : 453864 : unsigned j = nbst;
1865 : 453864 : if (POINTER_TYPE_P (oldtype))
1866 : : /* Iterate over well-known struct types like FILE (whose types
1867 : : aren't known to us) and compare the pointer to each to
1868 : : the pointer argument. */
1869 : 927049 : for (j = 0; j < nbst; ++j)
1870 : : {
1871 : 816828 : if (TREE_VALUE (oldargs) != builtin_structptr_types[j].node)
1872 : 680496 : continue;
1873 : : /* Store the first FILE* etc. argument type (whatever it is), and
1874 : : expect any subsequent declarations of file I/O etc. built-ins
1875 : : to refer to it rather than to fileptr_type_node etc. which is
1876 : : just void* (or const void*). */
1877 : 136332 : if (last_structptr_types[j])
1878 : : {
1879 : 119576 : if (!comptypes (last_structptr_types[j], newtype))
1880 : : {
1881 : 2 : *argno = i;
1882 : 2 : *strict = last_structptr_types[j];
1883 : : }
1884 : : }
1885 : : else
1886 : 16756 : last_structptr_types[j] = newtype;
1887 : : break;
1888 : : }
1889 : :
1890 : 453864 : if (j == nbst && !comptypes (oldtype, newtype))
1891 : : {
1892 : 245 : if (POINTER_TYPE_P (oldtype))
1893 : : {
1894 : : /* For incompatible pointers, only reject differences in
1895 : : the unqualified variants of the referenced types but
1896 : : consider differences in qualifiers as benign (report
1897 : : those to caller via *STRICT below). */
1898 : 204 : tree oldref = TYPE_MAIN_VARIANT (TREE_TYPE (oldtype));
1899 : 204 : tree newref = TYPE_MAIN_VARIANT (TREE_TYPE (newtype));
1900 : 204 : if (!comptypes (oldref, newref))
1901 : : return NULL_TREE;
1902 : : }
1903 : :
1904 : 192 : if (!*strict)
1905 : : {
1906 : 187 : *argno = i;
1907 : 187 : *strict = oldtype;
1908 : : }
1909 : : }
1910 : :
1911 : 453811 : oldargs = TREE_CHAIN (oldargs);
1912 : 453811 : newargs = TREE_CHAIN (newargs);
1913 : : }
1914 : :
1915 : 136540 : tree trytype = build_function_type (newrettype, tryargs);
1916 : :
1917 : : /* Allow declaration to change transaction_safe attribute. */
1918 : 136540 : tree oldattrs = TYPE_ATTRIBUTES (oldtype);
1919 : 136540 : tree oldtsafe = lookup_attribute ("transaction_safe", oldattrs);
1920 : 136540 : tree newattrs = TYPE_ATTRIBUTES (newtype);
1921 : 136540 : tree newtsafe = lookup_attribute ("transaction_safe", newattrs);
1922 : 136540 : if (oldtsafe && !newtsafe)
1923 : 0 : oldattrs = remove_attribute ("transaction_safe", oldattrs);
1924 : 136540 : else if (newtsafe && !oldtsafe)
1925 : 7 : oldattrs = tree_cons (get_identifier ("transaction_safe"),
1926 : : NULL_TREE, oldattrs);
1927 : :
1928 : 136540 : return build_type_attribute_variant (trytype, oldattrs);
1929 : : }
1930 : :
1931 : : /* Subroutine of diagnose_mismatched_decls. Check for function type
1932 : : mismatch involving an empty arglist vs a nonempty one and give clearer
1933 : : diagnostics. */
1934 : : static void
1935 : 162 : diagnose_arglist_conflict (tree newdecl, tree olddecl,
1936 : : tree newtype, tree oldtype)
1937 : : {
1938 : 162 : tree t;
1939 : :
1940 : 162 : if (TREE_CODE (olddecl) != FUNCTION_DECL
1941 : 92 : || !comptypes (TREE_TYPE (oldtype), TREE_TYPE (newtype))
1942 : 279 : || !((!prototype_p (oldtype) && DECL_INITIAL (olddecl) == NULL_TREE)
1943 : 62 : || (!prototype_p (newtype) && DECL_INITIAL (newdecl) == NULL_TREE)))
1944 : 145 : return;
1945 : :
1946 : 17 : t = TYPE_ARG_TYPES (oldtype);
1947 : 17 : if (t == NULL_TREE)
1948 : 9 : t = TYPE_ARG_TYPES (newtype);
1949 : 18 : for (; t; t = TREE_CHAIN (t))
1950 : : {
1951 : 18 : tree type = TREE_VALUE (t);
1952 : :
1953 : 18 : if (TREE_CHAIN (t) == NULL_TREE
1954 : 18 : && TYPE_MAIN_VARIANT (type) != void_type_node)
1955 : : {
1956 : 10 : inform (input_location, "a parameter list with an ellipsis "
1957 : : "cannot match an empty parameter name list declaration");
1958 : 10 : break;
1959 : : }
1960 : :
1961 : 8 : if (!error_operand_p (type)
1962 : 8 : && c_type_promotes_to (type) != type)
1963 : : {
1964 : 7 : inform (input_location, "an argument type that has a default "
1965 : : "promotion cannot match an empty parameter name list "
1966 : : "declaration");
1967 : 7 : break;
1968 : : }
1969 : : }
1970 : : }
1971 : :
1972 : : /* Another subroutine of diagnose_mismatched_decls. OLDDECL is an
1973 : : old-style function definition, NEWDECL is a prototype declaration.
1974 : : Diagnose inconsistencies in the argument list. Returns TRUE if
1975 : : the prototype is compatible, FALSE if not. */
1976 : : static bool
1977 : 19 : validate_proto_after_old_defn (tree newdecl, tree newtype, tree oldtype)
1978 : : {
1979 : 19 : tree newargs, oldargs;
1980 : 19 : int i;
1981 : :
1982 : : #define END_OF_ARGLIST(t) ((t) == void_type_node)
1983 : :
1984 : 19 : oldargs = TYPE_ACTUAL_ARG_TYPES (oldtype);
1985 : 19 : newargs = TYPE_ARG_TYPES (newtype);
1986 : 19 : i = 1;
1987 : :
1988 : 45 : for (;;)
1989 : : {
1990 : 32 : tree oldargtype = TREE_VALUE (oldargs);
1991 : 32 : tree newargtype = TREE_VALUE (newargs);
1992 : :
1993 : 32 : if (oldargtype == error_mark_node || newargtype == error_mark_node)
1994 : : return false;
1995 : :
1996 : 31 : oldargtype = (TYPE_ATOMIC (oldargtype)
1997 : 58 : ? c_build_qualified_type (TYPE_MAIN_VARIANT (oldargtype),
1998 : : TYPE_QUAL_ATOMIC)
1999 : 27 : : TYPE_MAIN_VARIANT (oldargtype));
2000 : 31 : newargtype = (TYPE_ATOMIC (newargtype)
2001 : 60 : ? c_build_qualified_type (TYPE_MAIN_VARIANT (newargtype),
2002 : : TYPE_QUAL_ATOMIC)
2003 : 29 : : TYPE_MAIN_VARIANT (newargtype));
2004 : :
2005 : 31 : if (END_OF_ARGLIST (oldargtype) && END_OF_ARGLIST (newargtype))
2006 : : break;
2007 : :
2008 : : /* Reaching the end of just one list means the two decls don't
2009 : : agree on the number of arguments. */
2010 : 22 : if (END_OF_ARGLIST (oldargtype))
2011 : : {
2012 : 2 : error ("prototype for %q+D declares more arguments "
2013 : : "than previous old-style definition", newdecl);
2014 : 2 : return false;
2015 : : }
2016 : 20 : else if (END_OF_ARGLIST (newargtype))
2017 : : {
2018 : 2 : error ("prototype for %q+D declares fewer arguments "
2019 : : "than previous old-style definition", newdecl);
2020 : 2 : return false;
2021 : : }
2022 : :
2023 : : /* Type for passing arg must be consistent with that declared
2024 : : for the arg. */
2025 : 18 : else if (!comptypes (oldargtype, newargtype))
2026 : : {
2027 : 5 : error ("prototype for %q+D declares argument %d"
2028 : : " with incompatible type",
2029 : : newdecl, i);
2030 : 5 : return false;
2031 : : }
2032 : :
2033 : 13 : oldargs = TREE_CHAIN (oldargs);
2034 : 13 : newargs = TREE_CHAIN (newargs);
2035 : 13 : i++;
2036 : 13 : }
2037 : :
2038 : : /* If we get here, no errors were found, but do issue a warning
2039 : : for this poor-style construct. */
2040 : 9 : warning (0, "prototype for %q+D follows non-prototype definition",
2041 : : newdecl);
2042 : 9 : return true;
2043 : : #undef END_OF_ARGLIST
2044 : : }
2045 : :
2046 : : /* Subroutine of diagnose_mismatched_decls. Report the location of DECL,
2047 : : first in a pair of mismatched declarations, using the diagnostic
2048 : : function DIAG. */
2049 : : static void
2050 : 394 : locate_old_decl (tree decl)
2051 : : {
2052 : 394 : if (TREE_CODE (decl) == FUNCTION_DECL
2053 : 190 : && fndecl_built_in_p (decl)
2054 : 397 : && !C_DECL_DECLARED_BUILTIN (decl))
2055 : : ;
2056 : 394 : else if (DECL_INITIAL (decl))
2057 : 115 : inform (input_location,
2058 : : "previous definition of %q+D with type %qT",
2059 : 115 : decl, TREE_TYPE (decl));
2060 : 279 : else if (C_DECL_IMPLICIT (decl))
2061 : 16 : inform (input_location,
2062 : : "previous implicit declaration of %q+D with type %qT",
2063 : 16 : decl, TREE_TYPE (decl));
2064 : : else
2065 : 263 : inform (input_location,
2066 : : "previous declaration of %q+D with type %qT",
2067 : 263 : decl, TREE_TYPE (decl));
2068 : 394 : }
2069 : :
2070 : :
2071 : : /* Helper function. For a tagged type, it finds the declaration
2072 : : for a visible tag declared in the the same scope if such a
2073 : : declaration exists. */
2074 : : static tree
2075 : 911 : previous_tag (tree type)
2076 : : {
2077 : 911 : struct c_binding *b = NULL;
2078 : 911 : tree name = TYPE_NAME (type);
2079 : :
2080 : 911 : if (name)
2081 : 564 : b = I_TAG_BINDING (name);
2082 : :
2083 : 564 : if (b)
2084 : 564 : b = b->shadowed;
2085 : :
2086 : 911 : if (b && B_IN_CURRENT_SCOPE (b))
2087 : 82 : return b->decl;
2088 : :
2089 : : return NULL_TREE;
2090 : : }
2091 : :
2092 : : /* Subroutine of duplicate_decls. Compare NEWDECL to OLDDECL.
2093 : : Returns true if the caller should proceed to merge the two, false
2094 : : if OLDDECL should simply be discarded. As a side effect, issues
2095 : : all necessary diagnostics for invalid or poor-style combinations.
2096 : : If it returns true, writes the types of NEWDECL and OLDDECL to
2097 : : *NEWTYPEP and *OLDTYPEP - these may have been adjusted from
2098 : : TREE_TYPE (NEWDECL, OLDDECL) respectively. */
2099 : :
2100 : : static bool
2101 : 4022870 : diagnose_mismatched_decls (tree newdecl, tree olddecl,
2102 : : tree *newtypep, tree *oldtypep)
2103 : : {
2104 : 4022870 : tree newtype, oldtype;
2105 : 4022870 : bool retval = true;
2106 : :
2107 : : #define DECL_EXTERN_INLINE(DECL) (DECL_DECLARED_INLINE_P (DECL) \
2108 : : && DECL_EXTERNAL (DECL))
2109 : :
2110 : : /* If we have error_mark_node for either decl or type, just discard
2111 : : the previous decl - we're in an error cascade already. */
2112 : 4022870 : if (olddecl == error_mark_node || newdecl == error_mark_node)
2113 : : return false;
2114 : 4022855 : *oldtypep = oldtype = TREE_TYPE (olddecl);
2115 : 4022855 : *newtypep = newtype = TREE_TYPE (newdecl);
2116 : 4022855 : if (oldtype == error_mark_node || newtype == error_mark_node)
2117 : : return false;
2118 : :
2119 : : /* Two different categories of symbol altogether. This is an error
2120 : : unless OLDDECL is a builtin. OLDDECL will be discarded in any case. */
2121 : 4022847 : if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
2122 : : {
2123 : 26 : if (!(TREE_CODE (olddecl) == FUNCTION_DECL
2124 : 17 : && fndecl_built_in_p (olddecl)
2125 : 15 : && !C_DECL_DECLARED_BUILTIN (olddecl)))
2126 : : {
2127 : 12 : auto_diagnostic_group d;
2128 : 12 : error ("%q+D redeclared as different kind of symbol", newdecl);
2129 : 12 : locate_old_decl (olddecl);
2130 : 12 : }
2131 : 14 : else if (TREE_PUBLIC (newdecl))
2132 : 3 : warning (OPT_Wbuiltin_declaration_mismatch,
2133 : : "built-in function %q+D declared as non-function",
2134 : : newdecl);
2135 : : else
2136 : 11 : warning (OPT_Wshadow, "declaration of %q+D shadows "
2137 : : "a built-in function", newdecl);
2138 : 26 : return false;
2139 : : }
2140 : :
2141 : : /* Enumerators have no linkage, so may only be declared once in a
2142 : : given scope. */
2143 : 4022821 : if (TREE_CODE (olddecl) == CONST_DECL)
2144 : : {
2145 : 20 : if (flag_isoc23
2146 : 18 : && TYPE_NAME (DECL_CONTEXT (newdecl))
2147 : 16 : && DECL_CONTEXT (newdecl) != DECL_CONTEXT (olddecl)
2148 : 34 : && TYPE_NAME (DECL_CONTEXT (newdecl)) == TYPE_NAME (DECL_CONTEXT (olddecl)))
2149 : : {
2150 : 12 : if (!simple_cst_equal (DECL_INITIAL (olddecl), DECL_INITIAL (newdecl)))
2151 : : {
2152 : 1 : auto_diagnostic_group d;
2153 : 1 : error ("conflicting redeclaration of enumerator %q+D", newdecl);
2154 : 1 : locate_old_decl (olddecl);
2155 : 1 : }
2156 : : }
2157 : : else
2158 : : {
2159 : 8 : auto_diagnostic_group d;
2160 : 8 : error ("redeclaration of enumerator %q+D", newdecl);
2161 : 8 : locate_old_decl (olddecl);
2162 : 8 : }
2163 : 20 : return false;
2164 : : }
2165 : :
2166 : 4022801 : bool pedwarned = false;
2167 : 4022801 : bool warned = false;
2168 : 4022801 : bool enum_and_int_p = false;
2169 : 4022801 : auto_diagnostic_group d;
2170 : :
2171 : 4022801 : int comptypes_result = comptypes_check_enum_int (oldtype, newtype,
2172 : : &enum_and_int_p);
2173 : 4022801 : if (!comptypes_result)
2174 : : {
2175 : 137217 : if (TREE_CODE (olddecl) == FUNCTION_DECL
2176 : 137147 : && fndecl_built_in_p (olddecl, BUILT_IN_NORMAL)
2177 : 274249 : && !C_DECL_DECLARED_BUILTIN (olddecl))
2178 : : {
2179 : : /* Accept "harmless" mismatches in function types such
2180 : : as missing qualifiers or int vs long when they're the same
2181 : : size. However, diagnose return and argument types that are
2182 : : incompatible according to language rules. */
2183 : 137031 : tree mismatch_expect;
2184 : 137031 : unsigned mismatch_argno;
2185 : :
2186 : 137031 : tree trytype = match_builtin_function_types (newtype, oldtype,
2187 : : &mismatch_expect,
2188 : : &mismatch_argno);
2189 : :
2190 : 137031 : if (trytype && comptypes (newtype, trytype))
2191 : 136540 : *oldtypep = oldtype = trytype;
2192 : : else
2193 : : {
2194 : : /* If types don't match for a built-in, throw away the
2195 : : built-in. No point in calling locate_old_decl here, it
2196 : : won't print anything. */
2197 : 491 : const char *header = header_for_builtin_fn (olddecl);
2198 : 491 : location_t loc = DECL_SOURCE_LOCATION (newdecl);
2199 : 491 : if (warning_at (loc, OPT_Wbuiltin_declaration_mismatch,
2200 : : "conflicting types for built-in function %q+D; "
2201 : : "expected %qT",
2202 : : newdecl, oldtype)
2203 : 491 : && header)
2204 : : {
2205 : : /* Suggest the right header to include as the preferred
2206 : : solution rather than the spelling of the declaration. */
2207 : 203 : rich_location richloc (line_table, loc);
2208 : 203 : maybe_add_include_fixit (&richloc, header, true);
2209 : 203 : inform (&richloc,
2210 : : "%qD is declared in header %qs", olddecl, header);
2211 : 203 : }
2212 : 491 : return false;
2213 : : }
2214 : :
2215 : 136540 : if (mismatch_expect && extra_warnings)
2216 : : {
2217 : 5 : location_t newloc = DECL_SOURCE_LOCATION (newdecl);
2218 : 5 : bool warned = false;
2219 : 5 : if (mismatch_argno)
2220 : 5 : warned = warning_at (newloc, OPT_Wbuiltin_declaration_mismatch,
2221 : : "mismatch in argument %u type of built-in "
2222 : : "function %qD; expected %qT",
2223 : : mismatch_argno, newdecl, mismatch_expect);
2224 : : else
2225 : 0 : warned = warning_at (newloc, OPT_Wbuiltin_declaration_mismatch,
2226 : : "mismatch in return type of built-in "
2227 : : "function %qD; expected %qT",
2228 : : newdecl, mismatch_expect);
2229 : 5 : const char *header = header_for_builtin_fn (olddecl);
2230 : 5 : if (warned && header)
2231 : : {
2232 : 5 : rich_location richloc (line_table, newloc);
2233 : 5 : maybe_add_include_fixit (&richloc, header, true);
2234 : 5 : inform (&richloc,
2235 : : "%qD is declared in header %qs", olddecl, header);
2236 : 5 : }
2237 : : }
2238 : : }
2239 : 186 : else if (TREE_CODE (olddecl) == FUNCTION_DECL
2240 : 186 : && DECL_IS_UNDECLARED_BUILTIN (olddecl))
2241 : : {
2242 : : /* A conflicting function declaration for a predeclared
2243 : : function that isn't actually built in. Objective C uses
2244 : : these. The new declaration silently overrides everything
2245 : : but the volatility (i.e. noreturn) indication. See also
2246 : : below. FIXME: Make Objective C use normal builtins. */
2247 : 0 : TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
2248 : 0 : return false;
2249 : : }
2250 : : /* Permit void foo (...) to match int foo (...) if the latter is
2251 : : the definition and implicit int was used. See
2252 : : c-torture/compile/920625-2.c. */
2253 : 116 : else if (TREE_CODE (newdecl) == FUNCTION_DECL && DECL_INITIAL (newdecl)
2254 : 56 : && TYPE_MAIN_VARIANT (TREE_TYPE (oldtype)) == void_type_node
2255 : 26 : && TYPE_MAIN_VARIANT (TREE_TYPE (newtype)) == integer_type_node
2256 : 192 : && C_FUNCTION_IMPLICIT_INT (newdecl) && !DECL_INITIAL (olddecl))
2257 : : {
2258 : 5 : pedwarned = pedwarn (input_location, 0,
2259 : : "conflicting types for %q+D", newdecl);
2260 : : /* Make sure we keep void as the return type. */
2261 : 5 : TREE_TYPE (newdecl) = *newtypep = newtype = oldtype;
2262 : 5 : C_FUNCTION_IMPLICIT_INT (newdecl) = 0;
2263 : : }
2264 : : /* Permit void foo (...) to match an earlier call to foo (...) with
2265 : : no declared type (thus, implicitly int). */
2266 : 181 : else if (TREE_CODE (newdecl) == FUNCTION_DECL
2267 : 111 : && TYPE_MAIN_VARIANT (TREE_TYPE (newtype)) == void_type_node
2268 : 81 : && TYPE_MAIN_VARIANT (TREE_TYPE (oldtype)) == integer_type_node
2269 : 204 : && C_DECL_IMPLICIT (olddecl) && !DECL_INITIAL (olddecl))
2270 : : {
2271 : 19 : pedwarned = pedwarn (input_location, 0,
2272 : : "conflicting types for %q+D; have %qT",
2273 : : newdecl, newtype);
2274 : : /* Make sure we keep void as the return type. */
2275 : 19 : TREE_TYPE (olddecl) = *oldtypep = oldtype = newtype;
2276 : : }
2277 : : else
2278 : : {
2279 : 162 : int new_quals = TYPE_QUALS (newtype);
2280 : 162 : int old_quals = TYPE_QUALS (oldtype);
2281 : :
2282 : 162 : if (new_quals != old_quals)
2283 : : {
2284 : 20 : addr_space_t new_addr = DECODE_QUAL_ADDR_SPACE (new_quals);
2285 : 20 : addr_space_t old_addr = DECODE_QUAL_ADDR_SPACE (old_quals);
2286 : 20 : if (new_addr != old_addr)
2287 : : {
2288 : 0 : if (ADDR_SPACE_GENERIC_P (new_addr))
2289 : 0 : error ("conflicting named address spaces (generic vs %s) "
2290 : : "for %q+D",
2291 : : c_addr_space_name (old_addr), newdecl);
2292 : 0 : else if (ADDR_SPACE_GENERIC_P (old_addr))
2293 : 0 : error ("conflicting named address spaces (%s vs generic) "
2294 : : "for %q+D",
2295 : : c_addr_space_name (new_addr), newdecl);
2296 : : else
2297 : 0 : error ("conflicting named address spaces (%s vs %s) "
2298 : : "for %q+D",
2299 : : c_addr_space_name (new_addr),
2300 : : c_addr_space_name (old_addr),
2301 : : newdecl);
2302 : : }
2303 : :
2304 : 20 : if (CLEAR_QUAL_ADDR_SPACE (new_quals)
2305 : 20 : != CLEAR_QUAL_ADDR_SPACE (old_quals))
2306 : 20 : error ("conflicting type qualifiers for %q+D", newdecl);
2307 : : }
2308 : : else
2309 : 142 : error ("conflicting types for %q+D; have %qT", newdecl, newtype);
2310 : 162 : diagnose_arglist_conflict (newdecl, olddecl, newtype, oldtype);
2311 : 162 : locate_old_decl (olddecl);
2312 : 162 : return false;
2313 : : }
2314 : : }
2315 : : /* Warn about enum/integer type mismatches. They are compatible types
2316 : : (C23 6.7.2.2/5), but may pose portability problems. */
2317 : 3885584 : else if (enum_and_int_p
2318 : 192 : && TREE_CODE (newdecl) != TYPE_DECL
2319 : : /* Don't warn about about acc_on_device built-in redeclaration,
2320 : : the built-in is declared with int rather than enum because
2321 : : the enum isn't intrinsic. */
2322 : 3885772 : && !(TREE_CODE (olddecl) == FUNCTION_DECL
2323 : 151 : && fndecl_built_in_p (olddecl, BUILT_IN_ACC_ON_DEVICE)
2324 : 121 : && !C_DECL_DECLARED_BUILTIN (olddecl)))
2325 : 67 : warned = warning_at (DECL_SOURCE_LOCATION (newdecl),
2326 : : OPT_Wenum_int_mismatch,
2327 : : "conflicting types for %q+D due to enum/integer "
2328 : : "mismatch; have %qT", newdecl, newtype);
2329 : :
2330 : : /* Redeclaration of a type is a constraint violation (6.7.2.3p1),
2331 : : but silently ignore the redeclaration if either is in a system
2332 : : header. (Conflicting redeclarations were handled above.) This
2333 : : is allowed for C11 if the types are the same, not just
2334 : : compatible. */
2335 : 4022148 : if (TREE_CODE (newdecl) == TYPE_DECL)
2336 : : {
2337 : 95421 : bool types_different = false;
2338 : :
2339 : 95421 : comptypes_result
2340 : 95421 : = comptypes_check_different_types (oldtype, newtype, &types_different);
2341 : :
2342 : 95421 : if (comptypes_result != 1 || types_different)
2343 : : {
2344 : 11 : error ("redefinition of typedef %q+D with different type", newdecl);
2345 : 11 : locate_old_decl (olddecl);
2346 : 11 : return false;
2347 : : }
2348 : :
2349 : 95410 : if (DECL_IN_SYSTEM_HEADER (newdecl)
2350 : 2169 : || DECL_IN_SYSTEM_HEADER (olddecl)
2351 : 1963 : || warning_suppressed_p (newdecl, OPT_Wpedantic)
2352 : 97373 : || warning_suppressed_p (olddecl, OPT_Wpedantic))
2353 : 93447 : return true; /* Allow OLDDECL to continue in use. */
2354 : :
2355 : 1963 : if (c_type_variably_modified_p (newtype))
2356 : : {
2357 : 3 : error ("redefinition of typedef %q+D with variably modified type",
2358 : : newdecl);
2359 : 3 : locate_old_decl (olddecl);
2360 : : }
2361 : 1960 : else if (pedwarn_c99 (input_location, OPT_Wpedantic,
2362 : : "redefinition of typedef %q+D", newdecl))
2363 : 8 : locate_old_decl (olddecl);
2364 : :
2365 : 1963 : return true;
2366 : : }
2367 : :
2368 : : /* Function declarations can either be 'static' or 'extern' (no
2369 : : qualifier is equivalent to 'extern' - C99 6.2.2p5) and therefore
2370 : : can never conflict with each other on account of linkage
2371 : : (6.2.2p4). Multiple definitions are not allowed (6.9p3,5) but
2372 : : gnu89 mode permits two definitions if one is 'extern inline' and
2373 : : one is not. The non- extern-inline definition supersedes the
2374 : : extern-inline definition. */
2375 : :
2376 : 3926727 : else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2377 : : {
2378 : : /* If you declare a built-in function name as static, or
2379 : : define the built-in with an old-style definition (so we
2380 : : can't validate the argument list) the built-in definition is
2381 : : overridden, but optionally warn this was a bad choice of name. */
2382 : 3909873 : if (fndecl_built_in_p (olddecl)
2383 : 7080842 : && !C_DECL_DECLARED_BUILTIN (olddecl))
2384 : : {
2385 : 3041838 : if (!TREE_PUBLIC (newdecl)
2386 : 3041838 : || (DECL_INITIAL (newdecl)
2387 : 4587 : && !prototype_p (TREE_TYPE (newdecl))))
2388 : : {
2389 : 120 : warning_at (DECL_SOURCE_LOCATION (newdecl),
2390 : : OPT_Wshadow, "declaration of %qD shadows "
2391 : : "a built-in function", newdecl);
2392 : : /* Discard the old built-in function. */
2393 : 120 : return false;
2394 : : }
2395 : :
2396 : 3041718 : if (!prototype_p (TREE_TYPE (newdecl)))
2397 : : {
2398 : : /* Set for built-ins that take no arguments. */
2399 : 1075 : bool func_void_args = false;
2400 : 1075 : if (tree at = TYPE_ARG_TYPES (oldtype))
2401 : 1075 : func_void_args = VOID_TYPE_P (TREE_VALUE (at));
2402 : :
2403 : 1075 : if (extra_warnings && !func_void_args)
2404 : 47 : warning_at (DECL_SOURCE_LOCATION (newdecl),
2405 : : OPT_Wbuiltin_declaration_mismatch,
2406 : : "declaration of built-in function %qD without "
2407 : : "a prototype; expected %qT",
2408 : 47 : newdecl, TREE_TYPE (olddecl));
2409 : : }
2410 : : }
2411 : :
2412 : 3909753 : if (DECL_INITIAL (newdecl))
2413 : : {
2414 : 218318 : if (DECL_INITIAL (olddecl))
2415 : : {
2416 : : /* If the new declaration isn't overriding an extern inline
2417 : : reject the new decl. In c99, no overriding is allowed
2418 : : in the same translation unit. */
2419 : 209 : if (!DECL_EXTERN_INLINE (olddecl)
2420 : 91 : || DECL_EXTERN_INLINE (newdecl)
2421 : 204 : || (!flag_gnu89_inline
2422 : 15 : && (!DECL_DECLARED_INLINE_P (olddecl)
2423 : 15 : || !lookup_attribute ("gnu_inline",
2424 : 15 : DECL_ATTRIBUTES (olddecl)))
2425 : 0 : && (!DECL_DECLARED_INLINE_P (newdecl)
2426 : 0 : || !lookup_attribute ("gnu_inline",
2427 : 0 : DECL_ATTRIBUTES (newdecl)))))
2428 : : {
2429 : 26 : auto_diagnostic_group d;
2430 : 26 : error ("redefinition of %q+D", newdecl);
2431 : 26 : locate_old_decl (olddecl);
2432 : 26 : return false;
2433 : 26 : }
2434 : : }
2435 : : }
2436 : : /* If we have a prototype after an old-style function definition,
2437 : : the argument types must be checked specially. */
2438 : 3691435 : else if (DECL_INITIAL (olddecl)
2439 : 805 : && !prototype_p (oldtype) && prototype_p (newtype)
2440 : 3691455 : && TYPE_ACTUAL_ARG_TYPES (oldtype))
2441 : : {
2442 : 19 : auto_diagnostic_group d;
2443 : 19 : if (!validate_proto_after_old_defn (newdecl, newtype, oldtype))
2444 : : {
2445 : 10 : locate_old_decl (olddecl);
2446 : 10 : return false;
2447 : : }
2448 : 19 : }
2449 : : /* A non-static declaration (even an "extern") followed by a
2450 : : static declaration is undefined behavior per C99 6.2.2p3-5,7.
2451 : : The same is true for a static forward declaration at block
2452 : : scope followed by a non-static declaration/definition at file
2453 : : scope. Static followed by non-static at the same scope is
2454 : : not undefined behavior, and is the most convenient way to get
2455 : : some effects (see e.g. what unwind-dw2-fde-glibc.c does to
2456 : : the definition of _Unwind_Find_FDE in unwind-dw2-fde.c), but
2457 : : we do diagnose it if -Wtraditional. */
2458 : 3909717 : if (TREE_PUBLIC (olddecl) && !TREE_PUBLIC (newdecl))
2459 : : {
2460 : : /* Two exceptions to the rule. If olddecl is an extern
2461 : : inline, or a predeclared function that isn't actually
2462 : : built in, newdecl silently overrides olddecl. The latter
2463 : : occur only in Objective C; see also above. (FIXME: Make
2464 : : Objective C use normal builtins.) */
2465 : 18 : if (!DECL_IS_UNDECLARED_BUILTIN (olddecl)
2466 : 36 : && !DECL_EXTERN_INLINE (olddecl))
2467 : : {
2468 : 4 : auto_diagnostic_group d;
2469 : 4 : error ("static declaration of %q+D follows "
2470 : : "non-static declaration", newdecl);
2471 : 4 : locate_old_decl (olddecl);
2472 : 4 : }
2473 : 18 : return false;
2474 : : }
2475 : 3909699 : else if (TREE_PUBLIC (newdecl) && !TREE_PUBLIC (olddecl))
2476 : : {
2477 : 2081 : if (DECL_CONTEXT (olddecl))
2478 : : {
2479 : 0 : auto_diagnostic_group d;
2480 : 0 : error ("non-static declaration of %q+D follows "
2481 : : "static declaration", newdecl);
2482 : 0 : locate_old_decl (olddecl);
2483 : 0 : return false;
2484 : 0 : }
2485 : 2081 : else if (warn_traditional)
2486 : : {
2487 : 2 : warned |= warning (OPT_Wtraditional,
2488 : : "non-static declaration of %q+D "
2489 : : "follows static declaration", newdecl);
2490 : : }
2491 : : }
2492 : :
2493 : : /* Make sure gnu_inline attribute is either not present, or
2494 : : present on all inline decls. */
2495 : 3909699 : if (DECL_DECLARED_INLINE_P (olddecl)
2496 : 3910756 : && DECL_DECLARED_INLINE_P (newdecl))
2497 : : {
2498 : 802 : bool newa = lookup_attribute ("gnu_inline",
2499 : 802 : DECL_ATTRIBUTES (newdecl)) != NULL;
2500 : 802 : bool olda = lookup_attribute ("gnu_inline",
2501 : 802 : DECL_ATTRIBUTES (olddecl)) != NULL;
2502 : 802 : if (newa != olda)
2503 : : {
2504 : 0 : auto_diagnostic_group d;
2505 : 0 : error_at (input_location, "%<gnu_inline%> attribute present on %q+D",
2506 : : newa ? newdecl : olddecl);
2507 : 0 : error_at (DECL_SOURCE_LOCATION (newa ? olddecl : newdecl),
2508 : : "but not here");
2509 : 0 : }
2510 : : }
2511 : : }
2512 : 16854 : else if (VAR_P (newdecl))
2513 : : {
2514 : : /* Only variables can be thread-local, and all declarations must
2515 : : agree on this property. */
2516 : 16823 : if (C_DECL_THREADPRIVATE_P (olddecl) && !DECL_THREAD_LOCAL_P (newdecl))
2517 : : {
2518 : : /* Nothing to check. Since OLDDECL is marked threadprivate
2519 : : and NEWDECL does not have a thread-local attribute, we
2520 : : will merge the threadprivate attribute into NEWDECL. */
2521 : : ;
2522 : : }
2523 : 50256 : else if (DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl))
2524 : : {
2525 : 6 : auto_diagnostic_group d;
2526 : 6 : if (DECL_THREAD_LOCAL_P (newdecl))
2527 : 3 : error ("thread-local declaration of %q+D follows "
2528 : : "non-thread-local declaration", newdecl);
2529 : : else
2530 : 3 : error ("non-thread-local declaration of %q+D follows "
2531 : : "thread-local declaration", newdecl);
2532 : :
2533 : 6 : locate_old_decl (olddecl);
2534 : 6 : return false;
2535 : 6 : }
2536 : :
2537 : : /* Multiple initialized definitions are not allowed (6.9p3,5).
2538 : : For this purpose, C23 makes it clear that thread-local
2539 : : declarations without extern are definitions, not tentative
2540 : : definitions, whether or not they have initializers. The
2541 : : wording before C23 was unclear; literally it would have made
2542 : : uninitialized thread-local declarations into tentative
2543 : : definitions only if they also used static, but without saying
2544 : : explicitly whether or not other cases count as
2545 : : definitions at all. */
2546 : 17397 : if ((DECL_INITIAL (newdecl) && DECL_INITIAL (olddecl))
2547 : 17396 : || (flag_isoc23
2548 : 199 : && DECL_THREAD_LOCAL_P (newdecl)
2549 : 11 : && !DECL_EXTERNAL (newdecl)
2550 : 7 : && !DECL_EXTERNAL (olddecl)))
2551 : : {
2552 : 7 : auto_diagnostic_group d;
2553 : 7 : error ("redefinition of %q+D", newdecl);
2554 : 7 : locate_old_decl (olddecl);
2555 : 7 : return false;
2556 : 7 : }
2557 : :
2558 : : /* Objects declared at file scope: if the first declaration had
2559 : : external linkage (even if it was an external reference) the
2560 : : second must have external linkage as well, or the behavior is
2561 : : undefined. If the first declaration had internal linkage, then
2562 : : the second must too, or else be an external reference (in which
2563 : : case the composite declaration still has internal linkage).
2564 : : As for function declarations, we warn about the static-then-
2565 : : extern case only for -Wtraditional. See generally 6.2.2p3-5,7. */
2566 : 16827 : if (DECL_FILE_SCOPE_P (newdecl)
2567 : 16810 : && TREE_PUBLIC (newdecl) != TREE_PUBLIC (olddecl))
2568 : : {
2569 : 141 : if (DECL_EXTERNAL (newdecl))
2570 : : {
2571 : 139 : if (!DECL_FILE_SCOPE_P (olddecl))
2572 : : {
2573 : 2 : auto_diagnostic_group d;
2574 : 2 : error ("extern declaration of %q+D follows "
2575 : : "declaration with no linkage", newdecl);
2576 : 2 : locate_old_decl (olddecl);
2577 : 2 : return false;
2578 : 2 : }
2579 : 137 : else if (warn_traditional)
2580 : : {
2581 : 0 : warned |= warning (OPT_Wtraditional,
2582 : : "non-static declaration of %q+D "
2583 : : "follows static declaration", newdecl);
2584 : : }
2585 : : }
2586 : : else
2587 : : {
2588 : 2 : auto_diagnostic_group d;
2589 : 2 : if (TREE_PUBLIC (newdecl))
2590 : 2 : error ("non-static declaration of %q+D follows "
2591 : : "static declaration", newdecl);
2592 : : else
2593 : 0 : error ("static declaration of %q+D follows "
2594 : : "non-static declaration", newdecl);
2595 : :
2596 : 2 : locate_old_decl (olddecl);
2597 : 2 : return false;
2598 : 2 : }
2599 : : }
2600 : : /* Two objects with the same name declared at the same block
2601 : : scope must both be external references (6.7p3). */
2602 : 16669 : else if (!DECL_FILE_SCOPE_P (newdecl))
2603 : : {
2604 : 17 : if (DECL_EXTERNAL (newdecl))
2605 : : {
2606 : : /* Extern with initializer at block scope, which will
2607 : : already have received an error. */
2608 : : }
2609 : 15 : else if (DECL_EXTERNAL (olddecl))
2610 : : {
2611 : 4 : auto_diagnostic_group d;
2612 : 4 : error ("declaration of %q+D with no linkage follows "
2613 : : "extern declaration", newdecl);
2614 : 4 : locate_old_decl (olddecl);
2615 : 4 : }
2616 : : else
2617 : : {
2618 : 11 : auto_diagnostic_group d;
2619 : 11 : error ("redeclaration of %q+D with no linkage", newdecl);
2620 : 11 : locate_old_decl (olddecl);
2621 : 11 : }
2622 : :
2623 : 17 : return false;
2624 : : }
2625 : :
2626 : : /* C++ does not permit a decl to appear multiple times at file
2627 : : scope. */
2628 : 16789 : if (warn_cxx_compat
2629 : 32 : && DECL_FILE_SCOPE_P (newdecl)
2630 : 32 : && !DECL_EXTERNAL (newdecl)
2631 : 16799 : && !DECL_EXTERNAL (olddecl))
2632 : 5 : warned |= warning_at (DECL_SOURCE_LOCATION (newdecl),
2633 : : OPT_Wc___compat,
2634 : : ("duplicate declaration of %qD is "
2635 : : "invalid in C++"),
2636 : : newdecl);
2637 : : }
2638 : :
2639 : : /* warnings */
2640 : : /* All decls must agree on a visibility. */
2641 : 3926519 : if (CODE_CONTAINS_STRUCT (TREE_CODE (newdecl), TS_DECL_WITH_VIS)
2642 : 3926488 : && DECL_VISIBILITY_SPECIFIED (newdecl) && DECL_VISIBILITY_SPECIFIED (olddecl)
2643 : 3927246 : && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2644 : : {
2645 : 1 : warned |= warning (0, "redeclaration of %q+D with different visibility "
2646 : : "(old visibility preserved)", newdecl);
2647 : : }
2648 : :
2649 : 3926519 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2650 : 3909699 : warned |= diagnose_mismatched_attributes (olddecl, newdecl);
2651 : : else /* PARM_DECL, VAR_DECL */
2652 : : {
2653 : : /* Redeclaration of a parameter is a constraint violation (this is
2654 : : not explicitly stated, but follows from C99 6.7p3 [no more than
2655 : : one declaration of the same identifier with no linkage in the
2656 : : same scope, except type tags] and 6.2.2p6 [parameters have no
2657 : : linkage]). We must check for a forward parameter declaration,
2658 : : indicated by TREE_ASM_WRITTEN on the old declaration - this is
2659 : : an extension, the mandatory diagnostic for which is handled by
2660 : : mark_forward_parm_decls. */
2661 : :
2662 : 16820 : if (TREE_CODE (newdecl) == PARM_DECL
2663 : 31 : && (!TREE_ASM_WRITTEN (olddecl) || TREE_ASM_WRITTEN (newdecl)))
2664 : : {
2665 : 2 : auto_diagnostic_group d;
2666 : 2 : error ("redefinition of parameter %q+D", newdecl);
2667 : 2 : locate_old_decl (olddecl);
2668 : 2 : return false;
2669 : 2 : }
2670 : : }
2671 : :
2672 : : /* Optional warning for completely redundant decls. */
2673 : 3926517 : if (!warned && !pedwarned
2674 : 3926443 : && warn_redundant_decls
2675 : : /* Don't warn about a function declaration followed by a
2676 : : definition. */
2677 : 18 : && !(TREE_CODE (newdecl) == FUNCTION_DECL
2678 : 2 : && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl))
2679 : : /* Don't warn about redundant redeclarations of builtins. */
2680 : 18 : && !(TREE_CODE (newdecl) == FUNCTION_DECL
2681 : 2 : && !fndecl_built_in_p (newdecl)
2682 : 2 : && fndecl_built_in_p (olddecl)
2683 : 2 : && !C_DECL_DECLARED_BUILTIN (olddecl))
2684 : : /* Don't warn about an extern followed by a definition. */
2685 : 17 : && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
2686 : : /* Don't warn about forward parameter decls. */
2687 : 17 : && !(TREE_CODE (newdecl) == PARM_DECL
2688 : 6 : && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
2689 : : /* Don't warn about a variable definition following a declaration. */
2690 : 3926528 : && !(VAR_P (newdecl)
2691 : 10 : && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
2692 : : {
2693 : 6 : warned = warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
2694 : : newdecl);
2695 : : }
2696 : :
2697 : : /* Report location of previous decl/defn. */
2698 : 3926517 : if (warned || pedwarned)
2699 : 80 : locate_old_decl (olddecl);
2700 : :
2701 : : #undef DECL_EXTERN_INLINE
2702 : :
2703 : : return retval;
2704 : 4022801 : }
2705 : :
2706 : : /* Subroutine of duplicate_decls. NEWDECL has been found to be
2707 : : consistent with OLDDECL, but carries new information. Merge the
2708 : : new information into OLDDECL. This function issues no
2709 : : diagnostics. */
2710 : :
2711 : : static void
2712 : 4021927 : merge_decls (tree newdecl, tree olddecl, tree newtype, tree oldtype)
2713 : : {
2714 : 4021927 : bool new_is_definition = (TREE_CODE (newdecl) == FUNCTION_DECL
2715 : 4021927 : && DECL_INITIAL (newdecl) != NULL_TREE);
2716 : 4021927 : bool new_is_prototype = (TREE_CODE (newdecl) == FUNCTION_DECL
2717 : 4021927 : && prototype_p (TREE_TYPE (newdecl)));
2718 : 4021927 : bool old_is_prototype = (TREE_CODE (olddecl) == FUNCTION_DECL
2719 : 4021927 : && prototype_p (TREE_TYPE (olddecl)));
2720 : :
2721 : : /* For real parm decl following a forward decl, rechain the old decl
2722 : : in its new location and clear TREE_ASM_WRITTEN (it's not a
2723 : : forward decl anymore). */
2724 : 4021927 : if (TREE_CODE (newdecl) == PARM_DECL
2725 : 29 : && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
2726 : : {
2727 : 29 : struct c_binding *b, **here;
2728 : :
2729 : 44 : for (here = ¤t_scope->bindings; *here; here = &(*here)->prev)
2730 : 44 : if ((*here)->decl == olddecl)
2731 : 29 : goto found;
2732 : 0 : gcc_unreachable ();
2733 : :
2734 : 29 : found:
2735 : 29 : b = *here;
2736 : 29 : *here = b->prev;
2737 : 29 : b->prev = current_scope->bindings;
2738 : 29 : current_scope->bindings = b;
2739 : :
2740 : 29 : TREE_ASM_WRITTEN (olddecl) = 0;
2741 : : }
2742 : :
2743 : 4021927 : DECL_ATTRIBUTES (newdecl)
2744 : 4021927 : = targetm.merge_decl_attributes (olddecl, newdecl);
2745 : :
2746 : : /* For typedefs use the old type, as the new type's DECL_NAME points
2747 : : at newdecl, which will be ggc_freed. */
2748 : 4021927 : if (TREE_CODE (newdecl) == TYPE_DECL)
2749 : : {
2750 : : /* But NEWTYPE might have an attribute, honor that. */
2751 : 95410 : tree tem = newtype;
2752 : 95410 : newtype = oldtype;
2753 : :
2754 : 95410 : if (TYPE_USER_ALIGN (tem))
2755 : : {
2756 : 6 : if (TYPE_ALIGN (tem) > TYPE_ALIGN (newtype))
2757 : 2 : SET_TYPE_ALIGN (newtype, TYPE_ALIGN (tem));
2758 : 6 : TYPE_USER_ALIGN (newtype) = true;
2759 : : }
2760 : :
2761 : : /* And remove the new type from the variants list. */
2762 : 95410 : if (TYPE_NAME (TREE_TYPE (newdecl)) == newdecl)
2763 : : {
2764 : 6 : tree remove = TREE_TYPE (newdecl);
2765 : 6 : if (TYPE_MAIN_VARIANT (remove) == remove)
2766 : : {
2767 : 2 : gcc_assert (TYPE_NEXT_VARIANT (remove) == NULL_TREE);
2768 : : /* If remove is the main variant, no need to remove that
2769 : : from the list. One of the DECL_ORIGINAL_TYPE
2770 : : variants, e.g. created for aligned attribute, might still
2771 : : refer to the newdecl TYPE_DECL though, so remove that one
2772 : : in that case. */
2773 : 2 : if (DECL_ORIGINAL_TYPE (newdecl)
2774 : 2 : && DECL_ORIGINAL_TYPE (newdecl) != remove)
2775 : 2 : for (tree t = TYPE_MAIN_VARIANT (DECL_ORIGINAL_TYPE (newdecl));
2776 : 2 : t; t = TYPE_MAIN_VARIANT (t))
2777 : 2 : if (TYPE_NAME (TYPE_NEXT_VARIANT (t)) == newdecl)
2778 : : {
2779 : 4 : TYPE_NEXT_VARIANT (t)
2780 : 2 : = TYPE_NEXT_VARIANT (TYPE_NEXT_VARIANT (t));
2781 : 2 : break;
2782 : : }
2783 : : }
2784 : : else
2785 : 4 : for (tree t = TYPE_MAIN_VARIANT (remove); ;
2786 : 0 : t = TYPE_NEXT_VARIANT (t))
2787 : 4 : if (TYPE_NEXT_VARIANT (t) == remove)
2788 : : {
2789 : 4 : TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (remove);
2790 : 4 : break;
2791 : : }
2792 : : }
2793 : : }
2794 : :
2795 : : /* Merge the data types specified in the two decls. */
2796 : 8043854 : TREE_TYPE (newdecl)
2797 : 4021927 : = TREE_TYPE (olddecl)
2798 : 8043854 : = composite_type (newtype, oldtype);
2799 : :
2800 : : /* Lay the type out, unless already done. */
2801 : 4021927 : if (!comptypes (oldtype, TREE_TYPE (newdecl)))
2802 : : {
2803 : 2 : if (TREE_TYPE (newdecl) != error_mark_node)
2804 : 2 : layout_type (TREE_TYPE (newdecl));
2805 : 2 : if (TREE_CODE (newdecl) != FUNCTION_DECL
2806 : : && TREE_CODE (newdecl) != TYPE_DECL
2807 : : && TREE_CODE (newdecl) != CONST_DECL)
2808 : 0 : layout_decl (newdecl, 0);
2809 : : }
2810 : : else
2811 : : {
2812 : : /* Since the type is OLDDECL's, make OLDDECL's size go with. */
2813 : 4021925 : DECL_SIZE (newdecl) = DECL_SIZE (olddecl);
2814 : 4021925 : DECL_SIZE_UNIT (newdecl) = DECL_SIZE_UNIT (olddecl);
2815 : 4021925 : SET_DECL_MODE (newdecl, DECL_MODE (olddecl));
2816 : 4021925 : if (DECL_ALIGN (olddecl) > DECL_ALIGN (newdecl))
2817 : : {
2818 : 44 : SET_DECL_ALIGN (newdecl, DECL_ALIGN (olddecl));
2819 : 44 : DECL_USER_ALIGN (newdecl) |= DECL_USER_ALIGN (olddecl);
2820 : : }
2821 : 4021881 : else if (DECL_ALIGN (olddecl) == DECL_ALIGN (newdecl)
2822 : 4021881 : && DECL_USER_ALIGN (olddecl) != DECL_USER_ALIGN (newdecl))
2823 : 3 : DECL_USER_ALIGN (newdecl) = 1;
2824 : 8043850 : if (DECL_WARN_IF_NOT_ALIGN (olddecl)
2825 : 4021925 : > DECL_WARN_IF_NOT_ALIGN (newdecl))
2826 : 0 : SET_DECL_WARN_IF_NOT_ALIGN (newdecl,
2827 : : DECL_WARN_IF_NOT_ALIGN (olddecl));
2828 : : }
2829 : :
2830 : : /* Keep the old rtl since we can safely use it. */
2831 : 4021927 : if (HAS_RTL_P (olddecl))
2832 : 4021927 : COPY_DECL_RTL (olddecl, newdecl);
2833 : :
2834 : : /* Merge the type qualifiers. */
2835 : 4021927 : if (TREE_READONLY (newdecl))
2836 : 338960 : TREE_READONLY (olddecl) = 1;
2837 : :
2838 : 4021927 : if (TREE_THIS_VOLATILE (newdecl))
2839 : 46614 : TREE_THIS_VOLATILE (olddecl) = 1;
2840 : :
2841 : : /* Merge deprecatedness. */
2842 : 4021927 : if (TREE_DEPRECATED (newdecl))
2843 : 331 : TREE_DEPRECATED (olddecl) = 1;
2844 : :
2845 : : /* Merge unavailability. */
2846 : 4021927 : if (TREE_UNAVAILABLE (newdecl))
2847 : 2 : TREE_UNAVAILABLE (olddecl) = 1;
2848 : :
2849 : : /* If a decl is in a system header and the other isn't, keep the one on the
2850 : : system header. Otherwise, keep source location of definition rather than
2851 : : declaration and of prototype rather than non-prototype unless that
2852 : : prototype is built-in. */
2853 : 4021927 : if (HAS_DECL_ASSEMBLER_NAME_P (olddecl)
2854 : 4021898 : && DECL_IN_SYSTEM_HEADER (olddecl)
2855 : 4418113 : && !DECL_IN_SYSTEM_HEADER (newdecl) )
2856 : 998 : DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
2857 : 4020929 : else if (HAS_DECL_ASSEMBLER_NAME_P (olddecl)
2858 : 4020900 : && DECL_IN_SYSTEM_HEADER (newdecl)
2859 : 7407951 : && !DECL_IN_SYSTEM_HEADER (olddecl))
2860 : 2991834 : DECL_SOURCE_LOCATION (olddecl) = DECL_SOURCE_LOCATION (newdecl);
2861 : 1029095 : else if ((DECL_INITIAL (newdecl) == NULL_TREE
2862 : 810298 : && DECL_INITIAL (olddecl) != NULL_TREE)
2863 : 1838492 : || (old_is_prototype && !new_is_prototype
2864 : 1176 : && !C_DECL_BUILTIN_PROTOTYPE (olddecl)))
2865 : 1000 : DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
2866 : :
2867 : : /* Merge the initialization information. */
2868 : 4021927 : if (DECL_INITIAL (newdecl) == NULL_TREE)
2869 : 3803058 : DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
2870 : :
2871 : : /* Merge 'constexpr' information. */
2872 : 4021927 : if (VAR_P (olddecl) && VAR_P (newdecl))
2873 : : {
2874 : 16789 : if (C_DECL_DECLARED_CONSTEXPR (olddecl))
2875 : 2 : C_DECL_DECLARED_CONSTEXPR (newdecl) = 1;
2876 : 16787 : else if (C_DECL_DECLARED_CONSTEXPR (newdecl))
2877 : 1 : C_DECL_DECLARED_CONSTEXPR (olddecl) = 1;
2878 : : }
2879 : :
2880 : : /* Merge the threadprivate attribute. */
2881 : 4021927 : if (VAR_P (olddecl) && C_DECL_THREADPRIVATE_P (olddecl))
2882 : 7 : C_DECL_THREADPRIVATE_P (newdecl) = 1;
2883 : :
2884 : 4021927 : if (HAS_DECL_ASSEMBLER_NAME_P (olddecl))
2885 : : {
2886 : : /* Copy the assembler name.
2887 : : Currently, it can only be defined in the prototype. */
2888 : 4021898 : COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2889 : :
2890 : : /* Use visibility of whichever declaration had it specified */
2891 : 4021898 : if (DECL_VISIBILITY_SPECIFIED (olddecl))
2892 : : {
2893 : 4709 : DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2894 : 4709 : DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2895 : : }
2896 : :
2897 : 4021898 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2898 : : {
2899 : 3909699 : DECL_STATIC_CONSTRUCTOR(newdecl) |= DECL_STATIC_CONSTRUCTOR(olddecl);
2900 : 3909699 : DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
2901 : 3909699 : DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
2902 : 3909699 : DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
2903 : 3909699 : |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
2904 : 3909699 : TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
2905 : 3909699 : DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
2906 : 3909699 : if (DECL_IS_OPERATOR_NEW_P (olddecl))
2907 : 0 : DECL_SET_IS_OPERATOR_NEW (newdecl, true);
2908 : 3909699 : if (DECL_IS_OPERATOR_DELETE_P (olddecl))
2909 : 0 : DECL_SET_IS_OPERATOR_DELETE (newdecl, true);
2910 : 3909699 : TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
2911 : 3909699 : DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
2912 : 3909699 : DECL_IS_NOVOPS (newdecl) |= DECL_IS_NOVOPS (olddecl);
2913 : : }
2914 : :
2915 : : /* Merge the storage class information. */
2916 : 4021898 : merge_weak (newdecl, olddecl);
2917 : :
2918 : : /* For functions, static overrides non-static. */
2919 : 4021898 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2920 : : {
2921 : 3909699 : TREE_PUBLIC (newdecl) &= TREE_PUBLIC (olddecl);
2922 : : /* This is since we don't automatically
2923 : : copy the attributes of NEWDECL into OLDDECL. */
2924 : 3909699 : TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl);
2925 : : /* If this clears `static', clear it in the identifier too. */
2926 : 3909699 : if (!TREE_PUBLIC (olddecl))
2927 : 7577 : TREE_PUBLIC (DECL_NAME (olddecl)) = 0;
2928 : : }
2929 : : }
2930 : :
2931 : : /* In c99, 'extern' declaration before (or after) 'inline' means this
2932 : : function is not DECL_EXTERNAL, unless 'gnu_inline' attribute
2933 : : is present. */
2934 : 4021927 : if (TREE_CODE (newdecl) == FUNCTION_DECL
2935 : 3909699 : && !flag_gnu89_inline
2936 : 3888745 : && (DECL_DECLARED_INLINE_P (newdecl)
2937 : 3711441 : || DECL_DECLARED_INLINE_P (olddecl))
2938 : 177498 : && (!DECL_DECLARED_INLINE_P (newdecl)
2939 : 177304 : || !DECL_DECLARED_INLINE_P (olddecl)
2940 : 789 : || !DECL_EXTERNAL (olddecl))
2941 : 176727 : && DECL_EXTERNAL (newdecl)
2942 : 176519 : && !lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (newdecl))
2943 : 4022024 : && !current_function_decl)
2944 : 80 : DECL_EXTERNAL (newdecl) = 0;
2945 : :
2946 : : /* An inline definition following a static declaration is not
2947 : : DECL_EXTERNAL. */
2948 : 4021927 : if (new_is_definition
2949 : 218275 : && (DECL_DECLARED_INLINE_P (newdecl)
2950 : 40749 : || DECL_DECLARED_INLINE_P (olddecl))
2951 : 4199667 : && !TREE_PUBLIC (olddecl))
2952 : 882 : DECL_EXTERNAL (newdecl) = 0;
2953 : :
2954 : 4021927 : if (DECL_EXTERNAL (newdecl))
2955 : : {
2956 : 3882583 : TREE_STATIC (newdecl) = TREE_STATIC (olddecl);
2957 : 3882583 : DECL_EXTERNAL (newdecl) = DECL_EXTERNAL (olddecl);
2958 : :
2959 : : /* An extern decl does not override previous storage class. */
2960 : 3882583 : TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
2961 : 3882583 : if (!DECL_EXTERNAL (newdecl))
2962 : : {
2963 : 1394 : DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
2964 : 1394 : DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2965 : : }
2966 : : }
2967 : : else
2968 : : {
2969 : 139344 : TREE_STATIC (olddecl) = TREE_STATIC (newdecl);
2970 : 139344 : TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl);
2971 : : }
2972 : :
2973 : 4021927 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2974 : : {
2975 : : /* If we're redefining a function previously defined as extern
2976 : : inline, make sure we emit debug info for the inline before we
2977 : : throw it away, in case it was inlined into a function that
2978 : : hasn't been written out yet. */
2979 : 3909699 : if (new_is_definition && DECL_INITIAL (olddecl))
2980 : : /* The new defn must not be inline. */
2981 : 75 : DECL_UNINLINABLE (newdecl) = 1;
2982 : : else
2983 : : {
2984 : : /* If either decl says `inline', this fn is inline, unless
2985 : : its definition was passed already. */
2986 : 3909624 : if (DECL_DECLARED_INLINE_P (newdecl)
2987 : 7641670 : || DECL_DECLARED_INLINE_P (olddecl))
2988 : 177763 : DECL_DECLARED_INLINE_P (newdecl) = 1;
2989 : :
2990 : 11728872 : DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2991 : 7820734 : = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2992 : :
2993 : 7819248 : DECL_DISREGARD_INLINE_LIMITS (newdecl)
2994 : 3909624 : = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2995 : 3909624 : = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2996 : 7819110 : || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2997 : : }
2998 : :
2999 : 3909699 : if (fndecl_built_in_p (olddecl))
3000 : : {
3001 : : /* If redeclaring a builtin function, it stays built in.
3002 : : But it gets tagged as having been declared. */
3003 : 3170849 : copy_decl_built_in_function (newdecl, olddecl);
3004 : 3170849 : C_DECL_DECLARED_BUILTIN (newdecl) = 1;
3005 : 3170849 : if (new_is_prototype)
3006 : : {
3007 : 3169677 : C_DECL_BUILTIN_PROTOTYPE (newdecl) = 0;
3008 : 3169677 : if (DECL_BUILT_IN_CLASS (newdecl) == BUILT_IN_NORMAL)
3009 : : {
3010 : 3169677 : enum built_in_function fncode = DECL_FUNCTION_CODE (newdecl);
3011 : 3169677 : switch (fncode)
3012 : : {
3013 : : /* If a compatible prototype of these builtin functions
3014 : : is seen, assume the runtime implements it with the
3015 : : expected semantics. */
3016 : 6395 : case BUILT_IN_STPCPY:
3017 : 6395 : if (builtin_decl_explicit_p (fncode))
3018 : 6395 : set_builtin_decl_implicit_p (fncode, true);
3019 : : break;
3020 : 3163282 : default:
3021 : 3163282 : if (builtin_decl_explicit_p (fncode))
3022 : 3163282 : set_builtin_decl_declared_p (fncode, true);
3023 : : break;
3024 : : }
3025 : :
3026 : 3169677 : copy_attributes_to_builtin (newdecl);
3027 : : }
3028 : : }
3029 : : else
3030 : 2344 : C_DECL_BUILTIN_PROTOTYPE (newdecl)
3031 : 2344 : = C_DECL_BUILTIN_PROTOTYPE (olddecl);
3032 : : }
3033 : :
3034 : : /* Preserve function specific target and optimization options */
3035 : 3909699 : if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
3036 : 3910198 : && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
3037 : 474 : DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
3038 : 474 : = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
3039 : :
3040 : 3909699 : if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
3041 : 3924049 : && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
3042 : 9 : DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
3043 : 9 : = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
3044 : :
3045 : : /* Also preserve various other info from the definition. */
3046 : 3909699 : if (!new_is_definition)
3047 : : {
3048 : 3691424 : tree t;
3049 : 3691424 : DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
3050 : 3691424 : DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
3051 : 3691424 : DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
3052 : 3691424 : DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
3053 : 3691424 : DECL_ARGUMENTS (newdecl) = copy_list (DECL_ARGUMENTS (olddecl));
3054 : 5533394 : for (t = DECL_ARGUMENTS (newdecl); t ; t = DECL_CHAIN (t))
3055 : 1841970 : DECL_CONTEXT (t) = newdecl;
3056 : :
3057 : : /* See if we've got a function to instantiate from. */
3058 : 3691424 : if (DECL_SAVED_TREE (olddecl))
3059 : 1582 : DECL_ABSTRACT_ORIGIN (newdecl)
3060 : 791 : = DECL_ABSTRACT_ORIGIN (olddecl);
3061 : : }
3062 : : }
3063 : :
3064 : : /* Merge the USED information. */
3065 : 4021927 : if (TREE_USED (olddecl))
3066 : 665837 : TREE_USED (newdecl) = 1;
3067 : 3356090 : else if (TREE_USED (newdecl))
3068 : 4 : TREE_USED (olddecl) = 1;
3069 : 4021927 : if (VAR_P (olddecl) || TREE_CODE (olddecl) == PARM_DECL)
3070 : 16818 : DECL_READ_P (newdecl) |= DECL_READ_P (olddecl);
3071 : 4021927 : if (DECL_PRESERVE_P (olddecl))
3072 : 25 : DECL_PRESERVE_P (newdecl) = 1;
3073 : 4021902 : else if (DECL_PRESERVE_P (newdecl))
3074 : 4 : DECL_PRESERVE_P (olddecl) = 1;
3075 : :
3076 : : /* Merge DECL_COMMON */
3077 : 16789 : if (VAR_P (olddecl) && VAR_P (newdecl)
3078 : 16789 : && !lookup_attribute ("common", DECL_ATTRIBUTES (newdecl))
3079 : 4038714 : && !lookup_attribute ("nocommon", DECL_ATTRIBUTES (newdecl)))
3080 : 33570 : DECL_COMMON (newdecl) = DECL_COMMON (newdecl) && DECL_COMMON (olddecl);
3081 : :
3082 : : /* Copy most of the decl-specific fields of NEWDECL into OLDDECL.
3083 : : But preserve OLDDECL's DECL_UID, DECL_CONTEXT and
3084 : : DECL_ARGUMENTS (if appropriate). */
3085 : 4021927 : {
3086 : 4021927 : unsigned olddecl_uid = DECL_UID (olddecl);
3087 : 4021927 : tree olddecl_context = DECL_CONTEXT (olddecl);
3088 : 4021927 : tree olddecl_arguments = NULL;
3089 : 4021927 : if (TREE_CODE (olddecl) == FUNCTION_DECL)
3090 : 3909699 : olddecl_arguments = DECL_ARGUMENTS (olddecl);
3091 : :
3092 : 4021927 : memcpy ((char *) olddecl + sizeof (struct tree_common),
3093 : : (char *) newdecl + sizeof (struct tree_common),
3094 : : sizeof (struct tree_decl_common) - sizeof (struct tree_common));
3095 : 4021927 : DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
3096 : 4021927 : switch (TREE_CODE (olddecl))
3097 : : {
3098 : 3926488 : case FUNCTION_DECL:
3099 : 3926488 : case VAR_DECL:
3100 : 3926488 : {
3101 : 3926488 : struct symtab_node *snode = olddecl->decl_with_vis.symtab_node;
3102 : :
3103 : 7852976 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3104 : : (char *) newdecl + sizeof (struct tree_decl_common),
3105 : 3926488 : tree_code_size (TREE_CODE (olddecl)) - sizeof (struct tree_decl_common));
3106 : 3926488 : olddecl->decl_with_vis.symtab_node = snode;
3107 : :
3108 : 3926488 : if ((DECL_EXTERNAL (olddecl)
3109 : : || TREE_PUBLIC (olddecl)
3110 : 45299 : || TREE_STATIC (olddecl))
3111 : 3971780 : && DECL_SECTION_NAME (newdecl) != NULL)
3112 : 8 : set_decl_section_name (olddecl, newdecl);
3113 : :
3114 : : /* This isn't quite correct for something like
3115 : : int __thread x attribute ((tls_model ("local-exec")));
3116 : : extern int __thread x;
3117 : : as we'll lose the "local-exec" model. */
3118 : 3926488 : if (VAR_P (olddecl) && DECL_THREAD_LOCAL_P (newdecl))
3119 : 89 : set_decl_tls_model (olddecl, DECL_TLS_MODEL (newdecl));
3120 : : break;
3121 : : }
3122 : :
3123 : 95439 : case FIELD_DECL:
3124 : 95439 : case PARM_DECL:
3125 : 95439 : case LABEL_DECL:
3126 : 95439 : case RESULT_DECL:
3127 : 95439 : case CONST_DECL:
3128 : 95439 : case TYPE_DECL:
3129 : 190878 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3130 : : (char *) newdecl + sizeof (struct tree_decl_common),
3131 : 95439 : tree_code_size (TREE_CODE (olddecl)) - sizeof (struct tree_decl_common));
3132 : 95439 : break;
3133 : :
3134 : 0 : default:
3135 : :
3136 : 0 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3137 : : (char *) newdecl + sizeof (struct tree_decl_common),
3138 : : sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common));
3139 : : }
3140 : 4021927 : DECL_UID (olddecl) = olddecl_uid;
3141 : 4021927 : DECL_CONTEXT (olddecl) = olddecl_context;
3142 : 4021927 : if (TREE_CODE (olddecl) == FUNCTION_DECL)
3143 : 3909699 : DECL_ARGUMENTS (olddecl) = olddecl_arguments;
3144 : : }
3145 : :
3146 : : /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
3147 : : so that encode_section_info has a chance to look at the new decl
3148 : : flags and attributes. */
3149 : 4021927 : if (DECL_RTL_SET_P (olddecl)
3150 : 4021927 : && (TREE_CODE (olddecl) == FUNCTION_DECL
3151 : 0 : || (VAR_P (olddecl) && TREE_STATIC (olddecl))))
3152 : 0 : make_decl_rtl (olddecl);
3153 : 4021927 : }
3154 : :
3155 : : /* Handle when a new declaration NEWDECL has the same name as an old
3156 : : one OLDDECL in the same binding contour. Prints an error message
3157 : : if appropriate.
3158 : :
3159 : : If safely possible, alter OLDDECL to look like NEWDECL, and return
3160 : : true. Otherwise, return false. */
3161 : :
3162 : : static bool
3163 : 4022870 : duplicate_decls (tree newdecl, tree olddecl)
3164 : : {
3165 : 4022870 : tree newtype = NULL, oldtype = NULL;
3166 : :
3167 : 4022870 : if (!diagnose_mismatched_decls (newdecl, olddecl, &newtype, &oldtype))
3168 : : {
3169 : : /* Avoid `unused variable' and other warnings for OLDDECL. */
3170 : 943 : suppress_warning (olddecl, OPT_Wunused);
3171 : : /* If the types are completely different, poison them both with
3172 : : error_mark_node. */
3173 : 943 : if (TREE_CODE (TREE_TYPE (newdecl)) != TREE_CODE (TREE_TYPE (olddecl))
3174 : 84 : && olddecl != error_mark_node
3175 : 1012 : && seen_error ())
3176 : : {
3177 : 53 : if (TREE_CODE (olddecl) != FUNCTION_DECL)
3178 : 42 : TREE_TYPE (olddecl) = error_mark_node;
3179 : 53 : if (TREE_CODE (newdecl) != FUNCTION_DECL)
3180 : 51 : TREE_TYPE (newdecl) = error_mark_node;
3181 : : }
3182 : 943 : return false;
3183 : : }
3184 : :
3185 : 4021927 : merge_decls (newdecl, olddecl, newtype, oldtype);
3186 : :
3187 : : /* The NEWDECL will no longer be needed.
3188 : :
3189 : : Before releasing the node, be sure to remove function from symbol
3190 : : table that might have been inserted there to record comdat group.
3191 : : Be sure to however do not free DECL_STRUCT_FUNCTION because this
3192 : : structure is shared in between NEWDECL and OLDECL. */
3193 : 4021927 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
3194 : 3909699 : DECL_STRUCT_FUNCTION (newdecl) = NULL;
3195 : 4021927 : if (VAR_OR_FUNCTION_DECL_P (newdecl))
3196 : : {
3197 : 3926488 : struct symtab_node *snode = symtab_node::get (newdecl);
3198 : 3926488 : if (snode)
3199 : 104 : snode->remove ();
3200 : : }
3201 : 4021927 : ggc_free (newdecl);
3202 : 4021927 : return true;
3203 : : }
3204 : :
3205 : :
3206 : : /* Check whether decl-node NEW_DECL shadows an existing declaration. */
3207 : : static void
3208 : 151277809 : warn_if_shadowing (tree new_decl)
3209 : : {
3210 : 151277809 : struct c_binding *b;
3211 : :
3212 : : /* Shadow warnings wanted? */
3213 : 151277086 : if (!(warn_shadow
3214 : : || warn_shadow_local
3215 : : || warn_shadow_compatible_local)
3216 : : /* No shadow warnings for internally generated vars. */
3217 : 151278048 : || DECL_IS_UNDECLARED_BUILTIN (new_decl))
3218 : : return;
3219 : :
3220 : : /* Is anything being shadowed? Invisible decls do not count. */
3221 : 253 : for (b = I_SYMBOL_BINDING (DECL_NAME (new_decl)); b; b = b->shadowed)
3222 : 157 : if (b->decl && b->decl != new_decl && !b->invisible
3223 : 214 : && (b->decl == error_mark_node
3224 : 43 : || diagnostic_report_warnings_p (global_dc,
3225 : : DECL_SOURCE_LOCATION (b->decl))))
3226 : : {
3227 : 57 : tree old_decl = b->decl;
3228 : :
3229 : 57 : if (old_decl == error_mark_node)
3230 : : {
3231 : 14 : warning (OPT_Wshadow, "declaration of %q+D shadows previous "
3232 : : "non-variable", new_decl);
3233 : 64 : break;
3234 : : }
3235 : :
3236 : 43 : bool warned = false;
3237 : 43 : auto_diagnostic_group d;
3238 : 43 : if (TREE_CODE (old_decl) == PARM_DECL)
3239 : : {
3240 : 5 : enum opt_code warning_code;
3241 : :
3242 : : /* If '-Wshadow=compatible-local' is specified without other
3243 : : -Wshadow= flags, we will warn only when the types of the
3244 : : shadowing variable (i.e. new_decl) and the shadowed variable
3245 : : (old_decl) are compatible. */
3246 : 5 : if (warn_shadow)
3247 : : warning_code = OPT_Wshadow;
3248 : 2 : else if (comptypes (TREE_TYPE (old_decl), TREE_TYPE (new_decl)))
3249 : : warning_code = OPT_Wshadow_compatible_local;
3250 : : else
3251 : 2 : warning_code = OPT_Wshadow_local;
3252 : 5 : warned = warning_at (DECL_SOURCE_LOCATION (new_decl), warning_code,
3253 : : "declaration of %qD shadows a parameter",
3254 : : new_decl);
3255 : : }
3256 : 38 : else if (DECL_FILE_SCOPE_P (old_decl))
3257 : : {
3258 : : /* Do not warn if a variable shadows a function, unless
3259 : : the variable is a function or a pointer-to-function. */
3260 : 34 : if (TREE_CODE (old_decl) == FUNCTION_DECL
3261 : 11 : && TREE_CODE (new_decl) != FUNCTION_DECL
3262 : 36 : && !FUNCTION_POINTER_TYPE_P (TREE_TYPE (new_decl)))
3263 : 7 : continue;
3264 : :
3265 : 20 : warned = warning_at (DECL_SOURCE_LOCATION (new_decl), OPT_Wshadow,
3266 : : "declaration of %qD shadows a global "
3267 : : "declaration",
3268 : : new_decl);
3269 : : }
3270 : 11 : else if (TREE_CODE (old_decl) == FUNCTION_DECL
3271 : 11 : && fndecl_built_in_p (old_decl))
3272 : : {
3273 : 0 : warning (OPT_Wshadow, "declaration of %q+D shadows "
3274 : : "a built-in function", new_decl);
3275 : 0 : break;
3276 : : }
3277 : : else
3278 : : {
3279 : 11 : enum opt_code warning_code;
3280 : :
3281 : : /* If '-Wshadow=compatible-local' is specified without other
3282 : : -Wshadow= flags, we will warn only when the types of the
3283 : : shadowing variable (i.e. new_decl) and the shadowed variable
3284 : : (old_decl) are compatible. */
3285 : 11 : if (warn_shadow)
3286 : : warning_code = OPT_Wshadow;
3287 : 8 : else if (comptypes (TREE_TYPE (old_decl), TREE_TYPE (new_decl)))
3288 : : warning_code = OPT_Wshadow_compatible_local;
3289 : : else
3290 : 2 : warning_code = OPT_Wshadow_local;
3291 : 11 : warned = warning_at (DECL_SOURCE_LOCATION (new_decl), warning_code,
3292 : : "declaration of %qD shadows a previous local",
3293 : : new_decl);
3294 : : }
3295 : :
3296 : 36 : if (warned)
3297 : 26 : inform (DECL_SOURCE_LOCATION (old_decl),
3298 : : "shadowed declaration is here");
3299 : :
3300 : : break;
3301 : 43 : }
3302 : : }
3303 : :
3304 : : /* Record a decl-node X as belonging to the current lexical scope.
3305 : : Check for errors (such as an incompatible declaration for the same
3306 : : name already seen in the same scope).
3307 : :
3308 : : Returns either X or an old decl for the same name.
3309 : : If an old decl is returned, it may have been smashed
3310 : : to agree with what X says. */
3311 : :
3312 : : tree
3313 : 178957327 : pushdecl (tree x)
3314 : : {
3315 : 178957327 : tree name = DECL_NAME (x);
3316 : 178957327 : struct c_scope *scope = current_scope;
3317 : 178957327 : struct c_binding *b;
3318 : 178957327 : bool nested = false;
3319 : 178957327 : location_t locus = DECL_SOURCE_LOCATION (x);
3320 : :
3321 : : /* Must set DECL_CONTEXT for everything not at file scope or
3322 : : DECL_FILE_SCOPE_P won't work. Local externs don't count
3323 : : unless they have initializers (which generate code). We
3324 : : also exclude CONST_DECLs because enumerators will get the
3325 : : type of the enum as context. */
3326 : 178957327 : if (current_function_decl
3327 : 8839281 : && TREE_CODE (x) != CONST_DECL
3328 : 187644517 : && (!VAR_OR_FUNCTION_DECL_P (x)
3329 : 8443717 : || DECL_INITIAL (x) || !TREE_PUBLIC (x)))
3330 : 8675201 : DECL_CONTEXT (x) = current_function_decl;
3331 : :
3332 : : /* Anonymous decls are just inserted in the scope. */
3333 : 178957327 : if (!name)
3334 : : {
3335 : 7105444 : bind (name, x, scope, /*invisible=*/false, /*nested=*/false,
3336 : : locus);
3337 : 7105444 : return x;
3338 : : }
3339 : :
3340 : : /* First, see if there is another declaration with the same name in
3341 : : the current scope. If there is, duplicate_decls may do all the
3342 : : work for us. If duplicate_decls returns false, that indicates
3343 : : two incompatible decls in the same scope; we are to silently
3344 : : replace the old one (duplicate_decls has issued all appropriate
3345 : : diagnostics). In particular, we should not consider possible
3346 : : duplicates in the external scope, or shadowing. */
3347 : 171851883 : b = I_SYMBOL_BINDING (name);
3348 : 171851883 : if (b && B_IN_SCOPE (b, scope))
3349 : : {
3350 : 999614 : struct c_binding *b_ext, *b_use;
3351 : 999614 : tree type = TREE_TYPE (x);
3352 : 999614 : tree visdecl = b->decl;
3353 : 999614 : tree vistype = TREE_TYPE (visdecl);
3354 : 999614 : if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE
3355 : 999614 : && COMPLETE_TYPE_P (TREE_TYPE (x)))
3356 : 1330 : b->inner_comp = false;
3357 : 999614 : b_use = b;
3358 : 999614 : b_ext = b;
3359 : : /* If this is an external linkage declaration, we should check
3360 : : for compatibility with the type in the external scope before
3361 : : setting the type at this scope based on the visible
3362 : : information only. */
3363 : 999614 : if (TREE_PUBLIC (x) && TREE_PUBLIC (visdecl))
3364 : : {
3365 : 1792562 : while (b_ext && !B_IN_EXTERNAL_SCOPE (b_ext))
3366 : 896290 : b_ext = b_ext->shadowed;
3367 : 896272 : if (b_ext)
3368 : : {
3369 : 896271 : b_use = b_ext;
3370 : 896271 : if (b_use->u.type)
3371 : 139933 : TREE_TYPE (b_use->decl) = b_use->u.type;
3372 : : }
3373 : : }
3374 : 999614 : if (duplicate_decls (x, b_use->decl))
3375 : : {
3376 : 999293 : if (b_use != b)
3377 : : {
3378 : : /* Save the updated type in the external scope and
3379 : : restore the proper type for this scope. */
3380 : 896078 : tree thistype;
3381 : 896078 : if (comptypes (vistype, type))
3382 : 896044 : thistype = composite_type (vistype, type);
3383 : : else
3384 : 34 : thistype = TREE_TYPE (b_use->decl);
3385 : 896078 : b_use->u.type = TREE_TYPE (b_use->decl);
3386 : 896078 : if (TREE_CODE (b_use->decl) == FUNCTION_DECL
3387 : 896078 : && fndecl_built_in_p (b_use->decl))
3388 : 149936 : thistype
3389 : 149936 : = build_type_attribute_variant (thistype,
3390 : 149936 : TYPE_ATTRIBUTES
3391 : : (b_use->u.type));
3392 : 896078 : TREE_TYPE (b_use->decl) = thistype;
3393 : : }
3394 : 999293 : return b_use->decl;
3395 : : }
3396 : : else
3397 : 321 : goto skip_external_and_shadow_checks;
3398 : : }
3399 : :
3400 : : /* All declarations with external linkage, and all external
3401 : : references, go in the external scope, no matter what scope is
3402 : : current. However, the binding in that scope is ignored for
3403 : : purposes of normal name lookup. A separate binding structure is
3404 : : created in the requested scope; this governs the normal
3405 : : visibility of the symbol.
3406 : :
3407 : : The binding in the externals scope is used exclusively for
3408 : : detecting duplicate declarations of the same object, no matter
3409 : : what scope they are in; this is what we do here. (C99 6.2.7p2:
3410 : : All declarations that refer to the same object or function shall
3411 : : have compatible type; otherwise, the behavior is undefined.)
3412 : : However, in Objective-C, we also want to detect declarations
3413 : : conflicting with those of the basic types. */
3414 : 299014180 : if ((DECL_EXTERNAL (x) || scope == file_scope)
3415 : 181585834 : && (VAR_OR_FUNCTION_DECL_P (x) || c_dialect_objc ()))
3416 : : {
3417 : 44426621 : tree type = TREE_TYPE (x);
3418 : 44426621 : tree vistype = NULL_TREE;
3419 : 44426621 : tree visdecl = NULL_TREE;
3420 : 44426621 : bool type_saved = false;
3421 : 3023281 : if (b && !B_IN_EXTERNAL_SCOPE (b)
3422 : 1021 : && VAR_OR_FUNCTION_DECL_P (b->decl)
3423 : 44427633 : && DECL_FILE_SCOPE_P (b->decl))
3424 : : {
3425 : 788 : visdecl = b->decl;
3426 : 788 : vistype = TREE_TYPE (visdecl);
3427 : : }
3428 : 44426621 : if (scope != file_scope
3429 : 44426621 : && !DECL_IN_SYSTEM_HEADER (x))
3430 : 11434 : warning_at (locus, OPT_Wnested_externs,
3431 : : "nested extern declaration of %qD", x);
3432 : :
3433 : 44428026 : while (b && !B_IN_EXTERNAL_SCOPE (b))
3434 : : {
3435 : : /* If this decl might be modified, save its type. This is
3436 : : done here rather than when the decl is first bound
3437 : : because the type may change after first binding, through
3438 : : being completed or through attributes being added. If we
3439 : : encounter multiple such decls, only the first should have
3440 : : its type saved; the others will already have had their
3441 : : proper types saved and the types will not have changed as
3442 : : their scopes will not have been re-entered. */
3443 : 1405 : if (DECL_P (b->decl) && DECL_FILE_SCOPE_P (b->decl) && !type_saved)
3444 : : {
3445 : 1005 : b->u.type = TREE_TYPE (b->decl);
3446 : 1005 : type_saved = true;
3447 : : }
3448 : 1405 : if (B_IN_FILE_SCOPE (b)
3449 : : && VAR_P (b->decl)
3450 : 995 : && TREE_STATIC (b->decl)
3451 : 280 : && TREE_CODE (TREE_TYPE (b->decl)) == ARRAY_TYPE
3452 : 138 : && !TYPE_DOMAIN (TREE_TYPE (b->decl))
3453 : 47 : && TREE_CODE (type) == ARRAY_TYPE
3454 : 47 : && TYPE_DOMAIN (type)
3455 : 28 : && TYPE_MAX_VALUE (TYPE_DOMAIN (type))
3456 : 1433 : && !integer_zerop (TYPE_MAX_VALUE (TYPE_DOMAIN (type))))
3457 : : {
3458 : : /* Array type completed in inner scope, which should be
3459 : : diagnosed if the completion does not have size 1 and
3460 : : it does not get completed in the file scope. */
3461 : 6 : b->inner_comp = true;
3462 : : }
3463 : 1405 : b = b->shadowed;
3464 : : }
3465 : :
3466 : : /* If a matching external declaration has been found, set its
3467 : : type to the composite of all the types of that declaration.
3468 : : After the consistency checks, it will be reset to the
3469 : : composite of the visible types only. */
3470 : 44426621 : if (b && b->u.type)
3471 : 761 : TREE_TYPE (b->decl) = b->u.type;
3472 : :
3473 : : /* the static does not go in the externals scope. */
3474 : 3023139 : if (b && duplicate_decls (x, b->decl))
3475 : : {
3476 : 3022517 : tree thistype;
3477 : 3022517 : if (vistype)
3478 : : {
3479 : 660 : if (comptypes (vistype, type))
3480 : 623 : thistype = composite_type (vistype, type);
3481 : : else
3482 : 37 : thistype = TREE_TYPE (b->decl);
3483 : : }
3484 : : else
3485 : : thistype = type;
3486 : 3022517 : b->u.type = TREE_TYPE (b->decl);
3487 : : /* Propagate the type attributes to the decl. */
3488 : 3022517 : thistype
3489 : 3022517 : = build_type_attribute_variant (thistype,
3490 : 3022517 : TYPE_ATTRIBUTES (b->u.type));
3491 : 3022517 : TREE_TYPE (b->decl) = thistype;
3492 : 3022517 : bind (name, b->decl, scope, /*invisible=*/false, /*nested=*/true,
3493 : : locus);
3494 : 3022517 : return b->decl;
3495 : : }
3496 : 41404104 : else if (TREE_PUBLIC (x))
3497 : : {
3498 : 41048210 : if (visdecl && !b && duplicate_decls (x, visdecl))
3499 : : {
3500 : : /* An external declaration at block scope referring to a
3501 : : visible entity with internal linkage. The composite
3502 : : type will already be correct for this scope, so we
3503 : : just need to fall through to make the declaration in
3504 : : this scope. */
3505 : : nested = true;
3506 : : x = visdecl;
3507 : : }
3508 : : else
3509 : : {
3510 : 41048093 : bind (name, x, external_scope, /*invisible=*/true,
3511 : : /*nested=*/false, locus);
3512 : 41048093 : nested = true;
3513 : : }
3514 : : }
3515 : : }
3516 : :
3517 : 167829752 : if (TREE_CODE (x) != PARM_DECL)
3518 : 63378878 : warn_if_shadowing (x);
3519 : :
3520 : 104450874 : skip_external_and_shadow_checks:
3521 : 167830073 : if (TREE_CODE (x) == TYPE_DECL)
3522 : : {
3523 : : /* So this is a typedef, set its underlying type. */
3524 : 9063564 : set_underlying_type (x);
3525 : :
3526 : : /* If X is a typedef defined in the current function, record it
3527 : : for the purpose of implementing the -Wunused-local-typedefs
3528 : : warning. */
3529 : 9063564 : record_locally_defined_typedef (x);
3530 : : }
3531 : :
3532 : 167830073 : bind (name, x, scope, /*invisible=*/false, nested, locus);
3533 : :
3534 : : /* If x's type is incomplete because it's based on a
3535 : : structure or union which has not yet been fully declared,
3536 : : attach it to that structure or union type, so we can go
3537 : : back and complete the variable declaration later, if the
3538 : : structure or union gets fully declared.
3539 : :
3540 : : If the input is erroneous, we can have error_mark in the type
3541 : : slot (e.g. "f(void a, ...)") - that doesn't count as an
3542 : : incomplete type. */
3543 : 167830073 : if (TREE_TYPE (x) != error_mark_node
3544 : 167830073 : && !COMPLETE_TYPE_P (TREE_TYPE (x)))
3545 : : {
3546 : 176840 : tree element = TREE_TYPE (x);
3547 : :
3548 : 196395 : while (TREE_CODE (element) == ARRAY_TYPE)
3549 : 19555 : element = TREE_TYPE (element);
3550 : 176840 : element = TYPE_MAIN_VARIANT (element);
3551 : :
3552 : 176840 : if ((RECORD_OR_UNION_TYPE_P (element)
3553 : 135616 : || TREE_CODE (element) == ENUMERAL_TYPE)
3554 : 41288 : && (TREE_CODE (x) != TYPE_DECL
3555 : 37911 : || TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE)
3556 : 180224 : && !COMPLETE_TYPE_P (element))
3557 : 265 : C_TYPE_INCOMPLETE_VARS (element)
3558 : 530 : = tree_cons (NULL_TREE, x, C_TYPE_INCOMPLETE_VARS (element));
3559 : : }
3560 : : return x;
3561 : : }
3562 : :
3563 : :
3564 : : /* Issue a permerror about implicit function declaration. ID is the function
3565 : : identifier, OLDDECL is a declaration of the function in a different scope,
3566 : : or NULL_TREE. */
3567 : :
3568 : : static void
3569 : 3771 : implicit_decl_permerror (location_t loc, tree id, tree olddecl)
3570 : : {
3571 : 3771 : if (!warn_implicit_function_declaration)
3572 : 2617 : return;
3573 : :
3574 : 1154 : bool warned;
3575 : 1154 : auto_diagnostic_group d;
3576 : 1154 : name_hint hint;
3577 : 1154 : if (!olddecl)
3578 : 548 : hint = lookup_name_fuzzy (id, FUZZY_LOOKUP_FUNCTION_NAME, loc);
3579 : :
3580 : 1154 : if (flag_isoc99)
3581 : : {
3582 : 1148 : if (const char *suggestion = hint.suggestion ())
3583 : : {
3584 : 103 : gcc_rich_location richloc (loc);
3585 : 103 : richloc.add_fixit_replace (suggestion);
3586 : 103 : warned = permerror_opt (&richloc, OPT_Wimplicit_function_declaration,
3587 : : "implicit declaration of function %qE;"
3588 : : " did you mean %qs?",
3589 : : id, suggestion);
3590 : 103 : }
3591 : : else
3592 : 1045 : warned = permerror_opt (loc, OPT_Wimplicit_function_declaration,
3593 : : "implicit declaration of function %qE", id);
3594 : : }
3595 : 6 : else if (const char *suggestion = hint.suggestion ())
3596 : : {
3597 : 2 : gcc_rich_location richloc (loc);
3598 : 2 : richloc.add_fixit_replace (suggestion);
3599 : 2 : warned = warning_at
3600 : 2 : (&richloc, OPT_Wimplicit_function_declaration,
3601 : : G_("implicit declaration of function %qE; did you mean %qs?"),
3602 : : id, suggestion);
3603 : 2 : }
3604 : : else
3605 : 4 : warned = warning_at (loc, OPT_Wimplicit_function_declaration,
3606 : : G_("implicit declaration of function %qE"), id);
3607 : :
3608 : 1154 : if (warned)
3609 : : {
3610 : : /* Whether the olddecl is an undeclared builtin function.
3611 : : locate_old_decl will not generate a diagnostic for those,
3612 : : so in that case we want to look elsewhere. */
3613 : 85 : bool undeclared_builtin = (olddecl
3614 : 28 : && TREE_CODE (olddecl) == FUNCTION_DECL
3615 : 28 : && fndecl_built_in_p (olddecl)
3616 : 112 : && !C_DECL_DECLARED_BUILTIN (olddecl));
3617 : 85 : if (undeclared_builtin)
3618 : : {
3619 : 27 : const char *header = header_for_builtin_fn (olddecl);
3620 : 27 : if (header)
3621 : : {
3622 : 20 : rich_location richloc (line_table, loc);
3623 : 20 : maybe_add_include_fixit (&richloc, header, true);
3624 : 20 : inform (&richloc,
3625 : : "include %qs or provide a declaration of %qE",
3626 : : header, id);
3627 : 20 : }
3628 : : }
3629 : 58 : else if (olddecl)
3630 : 1 : locate_old_decl (olddecl);
3631 : : }
3632 : :
3633 : 1069 : if (!warned)
3634 : 1154 : hint.suppress ();
3635 : 1154 : }
3636 : :
3637 : : /* Return the name of the header file that declares built-in function
3638 : : FNDECL, or null if either we don't know or don't expect to see an
3639 : : explicit declaration. */
3640 : :
3641 : : static const char *
3642 : 3051 : header_for_builtin_fn (tree fndecl)
3643 : : {
3644 : 3051 : if (DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL)
3645 : : return NULL;
3646 : :
3647 : 3051 : switch (DECL_FUNCTION_CODE (fndecl))
3648 : : {
3649 : : CASE_FLT_FN (BUILT_IN_ACOS):
3650 : : CASE_FLT_FN (BUILT_IN_ACOSH):
3651 : : CASE_FLT_FN (BUILT_IN_ASIN):
3652 : : CASE_FLT_FN (BUILT_IN_ASINH):
3653 : : CASE_FLT_FN (BUILT_IN_ATAN):
3654 : : CASE_FLT_FN (BUILT_IN_ATANH):
3655 : : CASE_FLT_FN (BUILT_IN_ATAN2):
3656 : : CASE_FLT_FN (BUILT_IN_CBRT):
3657 : : CASE_FLT_FN (BUILT_IN_CEIL):
3658 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_CEIL):
3659 : : CASE_FLT_FN (BUILT_IN_COPYSIGN):
3660 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_COPYSIGN):
3661 : : CASE_FLT_FN (BUILT_IN_COS):
3662 : : CASE_FLT_FN (BUILT_IN_COSH):
3663 : : CASE_FLT_FN (BUILT_IN_ERF):
3664 : : CASE_FLT_FN (BUILT_IN_ERFC):
3665 : : CASE_FLT_FN (BUILT_IN_EXP):
3666 : : CASE_FLT_FN (BUILT_IN_EXP2):
3667 : : CASE_FLT_FN (BUILT_IN_EXPM1):
3668 : : CASE_FLT_FN (BUILT_IN_FABS):
3669 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_FABS):
3670 : : CASE_FLT_FN (BUILT_IN_FDIM):
3671 : : CASE_FLT_FN (BUILT_IN_FLOOR):
3672 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_FLOOR):
3673 : : CASE_FLT_FN (BUILT_IN_FMA):
3674 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMA):
3675 : : CASE_FLT_FN (BUILT_IN_FMAX):
3676 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMAX):
3677 : : CASE_FLT_FN (BUILT_IN_FMIN):
3678 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMIN):
3679 : : CASE_FLT_FN (BUILT_IN_FMOD):
3680 : : CASE_FLT_FN (BUILT_IN_FREXP):
3681 : : CASE_FLT_FN (BUILT_IN_HYPOT):
3682 : : CASE_FLT_FN (BUILT_IN_ILOGB):
3683 : : CASE_FLT_FN (BUILT_IN_LDEXP):
3684 : : CASE_FLT_FN (BUILT_IN_LGAMMA):
3685 : : CASE_FLT_FN (BUILT_IN_LLRINT):
3686 : : CASE_FLT_FN (BUILT_IN_LLROUND):
3687 : : CASE_FLT_FN (BUILT_IN_LOG):
3688 : : CASE_FLT_FN (BUILT_IN_LOG10):
3689 : : CASE_FLT_FN (BUILT_IN_LOG1P):
3690 : : CASE_FLT_FN (BUILT_IN_LOG2):
3691 : : CASE_FLT_FN (BUILT_IN_LOGB):
3692 : : CASE_FLT_FN (BUILT_IN_LRINT):
3693 : : CASE_FLT_FN (BUILT_IN_LROUND):
3694 : : CASE_FLT_FN (BUILT_IN_MODF):
3695 : : CASE_FLT_FN (BUILT_IN_NAN):
3696 : : CASE_FLT_FN (BUILT_IN_NEARBYINT):
3697 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_NEARBYINT):
3698 : : CASE_FLT_FN (BUILT_IN_NEXTAFTER):
3699 : : CASE_FLT_FN (BUILT_IN_NEXTTOWARD):
3700 : : CASE_FLT_FN (BUILT_IN_POW):
3701 : : CASE_FLT_FN (BUILT_IN_REMAINDER):
3702 : : CASE_FLT_FN (BUILT_IN_REMQUO):
3703 : : CASE_FLT_FN (BUILT_IN_RINT):
3704 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_RINT):
3705 : : CASE_FLT_FN (BUILT_IN_ROUND):
3706 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_ROUND):
3707 : : CASE_FLT_FN (BUILT_IN_SCALBLN):
3708 : : CASE_FLT_FN (BUILT_IN_SCALBN):
3709 : : CASE_FLT_FN (BUILT_IN_SIN):
3710 : : CASE_FLT_FN (BUILT_IN_SINH):
3711 : : CASE_FLT_FN (BUILT_IN_SINCOS):
3712 : : CASE_FLT_FN (BUILT_IN_SQRT):
3713 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_SQRT):
3714 : : CASE_FLT_FN (BUILT_IN_TAN):
3715 : : CASE_FLT_FN (BUILT_IN_TANH):
3716 : : CASE_FLT_FN (BUILT_IN_TGAMMA):
3717 : : CASE_FLT_FN (BUILT_IN_TRUNC):
3718 : : CASE_FLT_FN_FLOATN_NX (BUILT_IN_TRUNC):
3719 : : case BUILT_IN_ISINF:
3720 : : case BUILT_IN_ISNAN:
3721 : : return "<math.h>";
3722 : 29 : CASE_FLT_FN (BUILT_IN_CABS):
3723 : 29 : CASE_FLT_FN (BUILT_IN_CACOS):
3724 : 29 : CASE_FLT_FN (BUILT_IN_CACOSH):
3725 : 29 : CASE_FLT_FN (BUILT_IN_CARG):
3726 : 29 : CASE_FLT_FN (BUILT_IN_CASIN):
3727 : 29 : CASE_FLT_FN (BUILT_IN_CASINH):
3728 : 29 : CASE_FLT_FN (BUILT_IN_CATAN):
3729 : 29 : CASE_FLT_FN (BUILT_IN_CATANH):
3730 : 29 : CASE_FLT_FN (BUILT_IN_CCOS):
3731 : 29 : CASE_FLT_FN (BUILT_IN_CCOSH):
3732 : 29 : CASE_FLT_FN (BUILT_IN_CEXP):
3733 : 29 : CASE_FLT_FN (BUILT_IN_CIMAG):
3734 : 29 : CASE_FLT_FN (BUILT_IN_CLOG):
3735 : 29 : CASE_FLT_FN (BUILT_IN_CONJ):
3736 : 29 : CASE_FLT_FN (BUILT_IN_CPOW):
3737 : 29 : CASE_FLT_FN (BUILT_IN_CPROJ):
3738 : 29 : CASE_FLT_FN (BUILT_IN_CREAL):
3739 : 29 : CASE_FLT_FN (BUILT_IN_CSIN):
3740 : 29 : CASE_FLT_FN (BUILT_IN_CSINH):
3741 : 29 : CASE_FLT_FN (BUILT_IN_CSQRT):
3742 : 29 : CASE_FLT_FN (BUILT_IN_CTAN):
3743 : 29 : CASE_FLT_FN (BUILT_IN_CTANH):
3744 : 29 : return "<complex.h>";
3745 : 207 : case BUILT_IN_MEMCHR:
3746 : 207 : case BUILT_IN_MEMCMP:
3747 : 207 : case BUILT_IN_MEMCPY:
3748 : 207 : case BUILT_IN_MEMMOVE:
3749 : 207 : case BUILT_IN_MEMSET:
3750 : 207 : case BUILT_IN_STRCAT:
3751 : 207 : case BUILT_IN_STRCHR:
3752 : 207 : case BUILT_IN_STRCMP:
3753 : 207 : case BUILT_IN_STRCPY:
3754 : 207 : case BUILT_IN_STRCSPN:
3755 : 207 : case BUILT_IN_STRLEN:
3756 : 207 : case BUILT_IN_STRNCAT:
3757 : 207 : case BUILT_IN_STRNCMP:
3758 : 207 : case BUILT_IN_STRNCPY:
3759 : 207 : case BUILT_IN_STRPBRK:
3760 : 207 : case BUILT_IN_STRRCHR:
3761 : 207 : case BUILT_IN_STRSPN:
3762 : 207 : case BUILT_IN_STRSTR:
3763 : 207 : return "<string.h>";
3764 : 544 : case BUILT_IN_FPRINTF:
3765 : 544 : case BUILT_IN_PUTC:
3766 : 544 : case BUILT_IN_FPUTC:
3767 : 544 : case BUILT_IN_FPUTS:
3768 : 544 : case BUILT_IN_FSCANF:
3769 : 544 : case BUILT_IN_FWRITE:
3770 : 544 : case BUILT_IN_PRINTF:
3771 : 544 : case BUILT_IN_PUTCHAR:
3772 : 544 : case BUILT_IN_PUTS:
3773 : 544 : case BUILT_IN_SCANF:
3774 : 544 : case BUILT_IN_SNPRINTF:
3775 : 544 : case BUILT_IN_SPRINTF:
3776 : 544 : case BUILT_IN_SSCANF:
3777 : 544 : case BUILT_IN_VFPRINTF:
3778 : 544 : case BUILT_IN_VFSCANF:
3779 : 544 : case BUILT_IN_VPRINTF:
3780 : 544 : case BUILT_IN_VSCANF:
3781 : 544 : case BUILT_IN_VSNPRINTF:
3782 : 544 : case BUILT_IN_VSPRINTF:
3783 : 544 : case BUILT_IN_VSSCANF:
3784 : 544 : return "<stdio.h>";
3785 : 2 : case BUILT_IN_ISALNUM:
3786 : 2 : case BUILT_IN_ISALPHA:
3787 : 2 : case BUILT_IN_ISBLANK:
3788 : 2 : case BUILT_IN_ISCNTRL:
3789 : 2 : case BUILT_IN_ISDIGIT:
3790 : 2 : case BUILT_IN_ISGRAPH:
3791 : 2 : case BUILT_IN_ISLOWER:
3792 : 2 : case BUILT_IN_ISPRINT:
3793 : 2 : case BUILT_IN_ISPUNCT:
3794 : 2 : case BUILT_IN_ISSPACE:
3795 : 2 : case BUILT_IN_ISUPPER:
3796 : 2 : case BUILT_IN_ISXDIGIT:
3797 : 2 : case BUILT_IN_TOLOWER:
3798 : 2 : case BUILT_IN_TOUPPER:
3799 : 2 : return "<ctype.h>";
3800 : 0 : case BUILT_IN_ISWALNUM:
3801 : 0 : case BUILT_IN_ISWALPHA:
3802 : 0 : case BUILT_IN_ISWBLANK:
3803 : 0 : case BUILT_IN_ISWCNTRL:
3804 : 0 : case BUILT_IN_ISWDIGIT:
3805 : 0 : case BUILT_IN_ISWGRAPH:
3806 : 0 : case BUILT_IN_ISWLOWER:
3807 : 0 : case BUILT_IN_ISWPRINT:
3808 : 0 : case BUILT_IN_ISWPUNCT:
3809 : 0 : case BUILT_IN_ISWSPACE:
3810 : 0 : case BUILT_IN_ISWUPPER:
3811 : 0 : case BUILT_IN_ISWXDIGIT:
3812 : 0 : case BUILT_IN_TOWLOWER:
3813 : 0 : case BUILT_IN_TOWUPPER:
3814 : 0 : return "<wctype.h>";
3815 : 1818 : case BUILT_IN_ABORT:
3816 : 1818 : case BUILT_IN_ABS:
3817 : 1818 : case BUILT_IN_CALLOC:
3818 : 1818 : case BUILT_IN_EXIT:
3819 : 1818 : case BUILT_IN_FREE:
3820 : 1818 : case BUILT_IN_LABS:
3821 : 1818 : case BUILT_IN_LLABS:
3822 : 1818 : case BUILT_IN_MALLOC:
3823 : 1818 : case BUILT_IN_REALLOC:
3824 : 1818 : case BUILT_IN__EXIT2:
3825 : 1818 : case BUILT_IN_ALIGNED_ALLOC:
3826 : 1818 : return "<stdlib.h>";
3827 : 1 : case BUILT_IN_IMAXABS:
3828 : 1 : return "<inttypes.h>";
3829 : 3 : case BUILT_IN_STRFTIME:
3830 : 3 : return "<time.h>";
3831 : : default:
3832 : : return NULL;
3833 : : }
3834 : : }
3835 : :
3836 : : /* Generate an implicit declaration for identifier FUNCTIONID at LOC as a
3837 : : function of type int (). */
3838 : :
3839 : : tree
3840 : 4724 : implicitly_declare (location_t loc, tree functionid)
3841 : : {
3842 : 4724 : struct c_binding *b;
3843 : 4724 : tree decl = NULL_TREE;
3844 : 4724 : tree asmspec_tree;
3845 : :
3846 : 4738 : for (b = I_SYMBOL_BINDING (functionid); b; b = b->shadowed)
3847 : : {
3848 : 3158 : if (B_IN_SCOPE (b, external_scope))
3849 : : {
3850 : 3144 : decl = b->decl;
3851 : 3144 : break;
3852 : : }
3853 : : }
3854 : :
3855 : 4724 : if (decl)
3856 : : {
3857 : 3144 : if (TREE_CODE (decl) != FUNCTION_DECL)
3858 : : return decl;
3859 : :
3860 : : /* FIXME: Objective-C has weird not-really-builtin functions
3861 : : which are supposed to be visible automatically. They wind up
3862 : : in the external scope because they're pushed before the file
3863 : : scope gets created. Catch this here and rebind them into the
3864 : : file scope. */
3865 : 3137 : if (!fndecl_built_in_p (decl) && DECL_IS_UNDECLARED_BUILTIN (decl))
3866 : : {
3867 : 0 : bind (functionid, decl, file_scope,
3868 : : /*invisible=*/false, /*nested=*/true,
3869 : 0 : DECL_SOURCE_LOCATION (decl));
3870 : 0 : return decl;
3871 : : }
3872 : : else
3873 : : {
3874 : 3137 : tree newtype = default_function_type;
3875 : 3137 : if (b->u.type)
3876 : 753 : TREE_TYPE (decl) = b->u.type;
3877 : : /* Implicit declaration of a function already declared
3878 : : (somehow) in a different scope, or as a built-in.
3879 : : If this is the first time this has happened, warn;
3880 : : then recycle the old declaration but with the new type. */
3881 : 3137 : if (!C_DECL_IMPLICIT (decl))
3882 : : {
3883 : 2191 : implicit_decl_permerror (loc, functionid, decl);
3884 : 2191 : C_DECL_IMPLICIT (decl) = 1;
3885 : : }
3886 : 3137 : if (fndecl_built_in_p (decl))
3887 : : {
3888 : 2705 : newtype = build_type_attribute_variant (newtype,
3889 : 2705 : TYPE_ATTRIBUTES
3890 : : (TREE_TYPE (decl)));
3891 : 2705 : if (!comptypes (newtype, TREE_TYPE (decl)))
3892 : : {
3893 : 2528 : auto_diagnostic_group d;
3894 : 2528 : bool warned = warning_at (loc,
3895 : : OPT_Wbuiltin_declaration_mismatch,
3896 : : "incompatible implicit "
3897 : : "declaration of built-in "
3898 : : "function %qD", decl);
3899 : : /* See if we can hint which header to include. */
3900 : 2528 : const char *header = header_for_builtin_fn (decl);
3901 : 2528 : if (header != NULL && warned)
3902 : : {
3903 : 133 : rich_location richloc (line_table, loc);
3904 : 133 : maybe_add_include_fixit (&richloc, header, true);
3905 : 133 : inform (&richloc,
3906 : : "include %qs or provide a declaration of %qD",
3907 : : header, decl);
3908 : 133 : }
3909 : 2528 : newtype = TREE_TYPE (decl);
3910 : 2528 : }
3911 : : }
3912 : : else
3913 : : {
3914 : 432 : if (!comptypes (newtype, TREE_TYPE (decl)))
3915 : : {
3916 : 2 : auto_diagnostic_group d;
3917 : 2 : error_at (loc, "incompatible implicit declaration of "
3918 : : "function %qD", decl);
3919 : 2 : locate_old_decl (decl);
3920 : 2 : }
3921 : : }
3922 : 3137 : b->u.type = TREE_TYPE (decl);
3923 : 3137 : TREE_TYPE (decl) = newtype;
3924 : 3137 : bind (functionid, decl, current_scope,
3925 : : /*invisible=*/false, /*nested=*/true,
3926 : 3137 : DECL_SOURCE_LOCATION (decl));
3927 : 3137 : return decl;
3928 : : }
3929 : : }
3930 : :
3931 : : /* Not seen before. */
3932 : 1580 : decl = build_decl (loc, FUNCTION_DECL, functionid, default_function_type);
3933 : 1580 : DECL_EXTERNAL (decl) = 1;
3934 : 1580 : TREE_PUBLIC (decl) = 1;
3935 : 1580 : C_DECL_IMPLICIT (decl) = 1;
3936 : 1580 : implicit_decl_permerror (loc, functionid, 0);
3937 : 1580 : asmspec_tree = maybe_apply_renaming_pragma (decl, /*asmname=*/NULL);
3938 : 1580 : if (asmspec_tree)
3939 : 1 : set_user_assembler_name (decl, TREE_STRING_POINTER (asmspec_tree));
3940 : :
3941 : : /* C89 says implicit declarations are in the innermost block.
3942 : : So we record the decl in the standard fashion. */
3943 : 1580 : decl = pushdecl (decl);
3944 : :
3945 : : /* No need to call objc_check_decl here - it's a function type. */
3946 : 1580 : rest_of_decl_compilation (decl, 0, 0);
3947 : :
3948 : : /* Write a record describing this implicit function declaration
3949 : : to the prototypes file (if requested). */
3950 : 1580 : gen_aux_info_record (decl, 0, 1, 0);
3951 : :
3952 : : /* Possibly apply some default attributes to this implicit declaration. */
3953 : 1580 : decl_attributes (&decl, NULL_TREE, 0);
3954 : :
3955 : 1580 : return decl;
3956 : : }
3957 : :
3958 : : /* Issue an error message for a reference to an undeclared variable
3959 : : ID, including a reference to a builtin outside of function-call
3960 : : context. Establish a binding of the identifier to error_mark_node
3961 : : in an appropriate scope, which will suppress further errors for the
3962 : : same identifier. The error message should be given location LOC. */
3963 : : void
3964 : 1463 : undeclared_variable (location_t loc, tree id)
3965 : : {
3966 : 1463 : static bool already = false;
3967 : 1463 : struct c_scope *scope;
3968 : :
3969 : 1463 : auto_diagnostic_group d;
3970 : 1463 : if (current_function_decl == NULL_TREE)
3971 : : {
3972 : 657 : name_hint guessed_id = lookup_name_fuzzy (id, FUZZY_LOOKUP_NAME, loc);
3973 : 657 : if (const char *suggestion = guessed_id.suggestion ())
3974 : : {
3975 : 86 : gcc_rich_location richloc (loc);
3976 : 86 : richloc.add_fixit_replace (suggestion);
3977 : 86 : error_at (&richloc,
3978 : : "%qE undeclared here (not in a function);"
3979 : : " did you mean %qs?",
3980 : : id, suggestion);
3981 : 86 : }
3982 : : else
3983 : 571 : error_at (loc, "%qE undeclared here (not in a function)", id);
3984 : 657 : scope = current_scope;
3985 : 657 : }
3986 : : else
3987 : : {
3988 : 806 : if (!objc_diagnose_private_ivar (id))
3989 : : {
3990 : 806 : name_hint guessed_id = lookup_name_fuzzy (id, FUZZY_LOOKUP_NAME, loc);
3991 : 806 : if (const char *suggestion = guessed_id.suggestion ())
3992 : : {
3993 : 37 : gcc_rich_location richloc (loc);
3994 : 37 : richloc.add_fixit_replace (suggestion);
3995 : 37 : error_at (&richloc,
3996 : : "%qE undeclared (first use in this function);"
3997 : : " did you mean %qs?",
3998 : : id, suggestion);
3999 : 37 : }
4000 : : else
4001 : 769 : error_at (loc, "%qE undeclared (first use in this function)", id);
4002 : 806 : }
4003 : 806 : if (!already)
4004 : : {
4005 : 190 : inform (loc, "each undeclared identifier is reported only"
4006 : : " once for each function it appears in");
4007 : 190 : already = true;
4008 : : }
4009 : :
4010 : : /* If we are parsing old-style parameter decls, current_function_decl
4011 : : will be nonnull but current_function_scope will be null. */
4012 : 806 : scope = current_function_scope ? current_function_scope : current_scope;
4013 : : }
4014 : 1463 : bind (id, error_mark_node, scope, /*invisible=*/false, /*nested=*/false,
4015 : : UNKNOWN_LOCATION);
4016 : 1463 : }
4017 : :
4018 : : /* Subroutine of lookup_label, declare_label, define_label: construct a
4019 : : LABEL_DECL with all the proper frills. Also create a struct
4020 : : c_label_vars initialized for the current scope. */
4021 : :
4022 : : static tree
4023 : 22645 : make_label (location_t location, tree name, bool defining,
4024 : : struct c_label_vars **p_label_vars)
4025 : : {
4026 : 22645 : tree label = build_decl (location, LABEL_DECL, name, void_type_node);
4027 : 22645 : DECL_CONTEXT (label) = current_function_decl;
4028 : 22645 : SET_DECL_MODE (label, VOIDmode);
4029 : :
4030 : 22645 : c_label_vars *label_vars = ggc_alloc<c_label_vars> ();
4031 : 22645 : label_vars->shadowed = NULL;
4032 : 22645 : set_spot_bindings (&label_vars->label_bindings, defining);
4033 : 22645 : label_vars->decls_in_scope = make_tree_vector ();
4034 : 22645 : label_vars->gotos = NULL;
4035 : 22645 : *p_label_vars = label_vars;
4036 : :
4037 : 22645 : return label;
4038 : : }
4039 : :
4040 : : /* Get the LABEL_DECL corresponding to identifier NAME as a label.
4041 : : Create one if none exists so far for the current function.
4042 : : This is called when a label is used in a goto expression or
4043 : : has its address taken. */
4044 : :
4045 : : tree
4046 : 84486 : lookup_label (tree name)
4047 : : {
4048 : 84486 : tree label;
4049 : 84486 : struct c_label_vars *label_vars;
4050 : :
4051 : 84486 : if (current_function_scope == 0)
4052 : : {
4053 : 2 : error ("label %qE referenced outside of any function", name);
4054 : 2 : return NULL_TREE;
4055 : : }
4056 : :
4057 : : /* Use a label already defined or ref'd with this name, but not if
4058 : : it is inherited from a containing function and wasn't declared
4059 : : using __label__. */
4060 : 84484 : label = I_LABEL_DECL (name);
4061 : 79151 : if (label && (DECL_CONTEXT (label) == current_function_decl
4062 : 605 : || C_DECLARED_LABEL_FLAG (label)))
4063 : : {
4064 : : /* If the label has only been declared, update its apparent
4065 : : location to point here, for better diagnostics if it
4066 : : turns out not to have been defined. */
4067 : 79144 : if (DECL_INITIAL (label) == NULL_TREE)
4068 : 62624 : DECL_SOURCE_LOCATION (label) = input_location;
4069 : 79144 : return label;
4070 : : }
4071 : :
4072 : : /* No label binding for that identifier; make one. */
4073 : 5340 : label = make_label (input_location, name, false, &label_vars);
4074 : :
4075 : : /* Ordinary labels go in the current function scope. */
4076 : 5340 : bind_label (name, label, current_function_scope, label_vars);
4077 : :
4078 : 5340 : return label;
4079 : : }
4080 : :
4081 : : /* Issue a warning about DECL for a goto statement at GOTO_LOC going
4082 : : to LABEL. */
4083 : :
4084 : : static void
4085 : 1469 : warn_about_goto (location_t goto_loc, tree label, tree decl)
4086 : : {
4087 : 1469 : auto_diagnostic_group d;
4088 : 1469 : if (c_type_variably_modified_p (TREE_TYPE (decl)))
4089 : 1464 : error_at (goto_loc,
4090 : : "jump into scope of identifier with variably modified type");
4091 : 5 : else if (flag_openmp
4092 : 5 : && lookup_attribute ("omp allocate", DECL_ATTRIBUTES (decl)))
4093 : 2 : error_at (goto_loc, "jump skips OpenMP %<allocate%> allocation");
4094 : : else
4095 : 3 : if (!warning_at (goto_loc, OPT_Wjump_misses_init,
4096 : : "jump skips variable initialization"))
4097 : 0 : return;
4098 : 1469 : inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", label);
4099 : 1469 : inform (DECL_SOURCE_LOCATION (decl), "%qD declared here", decl);
4100 : 1469 : }
4101 : :
4102 : : /* Look up a label because of a goto statement. This is like
4103 : : lookup_label, but also issues any appropriate warnings. */
4104 : :
4105 : : tree
4106 : 82677 : lookup_label_for_goto (location_t loc, tree name)
4107 : : {
4108 : 82677 : tree label;
4109 : 82677 : struct c_label_vars *label_vars;
4110 : 82677 : unsigned int ix;
4111 : 82677 : tree decl;
4112 : :
4113 : 82677 : label = lookup_label (name);
4114 : 82677 : if (label == NULL_TREE)
4115 : : return NULL_TREE;
4116 : :
4117 : : /* If we are jumping to a different function, we can't issue any
4118 : : useful warnings. */
4119 : 82677 : if (DECL_CONTEXT (label) != current_function_decl)
4120 : : {
4121 : 519 : gcc_assert (C_DECLARED_LABEL_FLAG (label));
4122 : : return label;
4123 : : }
4124 : :
4125 : 82158 : label_vars = I_LABEL_BINDING (name)->u.label;
4126 : :
4127 : : /* If the label has not yet been defined, then push this goto on a
4128 : : list for possible later warnings. */
4129 : 82158 : if (label_vars->label_bindings.scope == NULL)
4130 : : {
4131 : 65854 : c_goto_bindings *g = ggc_alloc<c_goto_bindings> ();
4132 : :
4133 : 65854 : g->loc = loc;
4134 : 65854 : set_spot_bindings (&g->goto_bindings, true);
4135 : 65854 : vec_safe_push (label_vars->gotos, g);
4136 : 65854 : return label;
4137 : : }
4138 : :
4139 : : /* If there are any decls in label_vars->decls_in_scope, then this
4140 : : goto has missed the declaration of the decl. This happens for a
4141 : : case like
4142 : : int i = 1;
4143 : : lab:
4144 : : ...
4145 : : goto lab;
4146 : : Issue a warning or error. */
4147 : 17079 : FOR_EACH_VEC_SAFE_ELT (label_vars->decls_in_scope, ix, decl)
4148 : 775 : warn_about_goto (loc, label, decl);
4149 : :
4150 : 16304 : if (label_vars->label_bindings.left_stmt_expr)
4151 : : {
4152 : 120 : auto_diagnostic_group d;
4153 : 120 : error_at (loc, "jump into statement expression");
4154 : 120 : inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", label);
4155 : 120 : }
4156 : :
4157 : : return label;
4158 : : }
4159 : :
4160 : : /* Make a label named NAME in the current function, shadowing silently
4161 : : any that may be inherited from containing functions or containing
4162 : : scopes. This is called for __label__ declarations. */
4163 : :
4164 : : tree
4165 : 1176 : declare_label (tree name)
4166 : : {
4167 : 1176 : struct c_binding *b = I_LABEL_BINDING (name);
4168 : 1176 : tree label;
4169 : 1176 : struct c_label_vars *label_vars;
4170 : :
4171 : : /* Check to make sure that the label hasn't already been declared
4172 : : at this scope */
4173 : 1176 : if (b && B_IN_CURRENT_SCOPE (b))
4174 : : {
4175 : 2 : auto_diagnostic_group d;
4176 : 2 : error ("duplicate label declaration %qE", name);
4177 : 2 : locate_old_decl (b->decl);
4178 : :
4179 : : /* Just use the previous declaration. */
4180 : 2 : return b->decl;
4181 : 2 : }
4182 : :
4183 : 1174 : label = make_label (input_location, name, false, &label_vars);
4184 : 1174 : C_DECLARED_LABEL_FLAG (label) = 1;
4185 : :
4186 : : /* Declared labels go in the current scope. */
4187 : 1174 : bind_label (name, label, current_scope, label_vars);
4188 : :
4189 : 1174 : return label;
4190 : : }
4191 : :
4192 : : /* When we define a label, issue any appropriate warnings if there are
4193 : : any gotos earlier in the function which jump to this label. */
4194 : :
4195 : : static void
4196 : 6434 : check_earlier_gotos (tree label, struct c_label_vars* label_vars)
4197 : : {
4198 : 6434 : unsigned int ix;
4199 : 6434 : struct c_goto_bindings *g;
4200 : :
4201 : 72222 : FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g)
4202 : : {
4203 : 65788 : struct c_binding *b;
4204 : 65788 : struct c_scope *scope;
4205 : :
4206 : : /* We have a goto to this label. The goto is going forward. In
4207 : : g->scope, the goto is going to skip any binding which was
4208 : : defined after g->bindings_in_scope. */
4209 : 65788 : if (g->goto_bindings.scope->has_jump_unsafe_decl)
4210 : : {
4211 : 239 : for (b = g->goto_bindings.scope->bindings;
4212 : 557 : b != g->goto_bindings.bindings_in_scope;
4213 : 318 : b = b->prev)
4214 : : {
4215 : 318 : if (decl_jump_unsafe (b->decl))
4216 : 159 : warn_about_goto (g->loc, label, b->decl);
4217 : : }
4218 : : }
4219 : :
4220 : : /* We also need to warn about decls defined in any scopes
4221 : : between the scope of the label and the scope of the goto. */
4222 : 65788 : for (scope = label_vars->label_bindings.scope;
4223 : 68281 : scope != g->goto_bindings.scope;
4224 : 2493 : scope = scope->outer)
4225 : : {
4226 : 2493 : gcc_assert (scope != NULL);
4227 : 2493 : if (scope->has_jump_unsafe_decl)
4228 : : {
4229 : 321 : if (scope == label_vars->label_bindings.scope)
4230 : 249 : b = label_vars->label_bindings.bindings_in_scope;
4231 : : else
4232 : 72 : b = scope->bindings;
4233 : 856 : for (; b != NULL; b = b->prev)
4234 : : {
4235 : 535 : if (decl_jump_unsafe (b->decl))
4236 : 535 : warn_about_goto (g->loc, label, b->decl);
4237 : : }
4238 : : }
4239 : : }
4240 : :
4241 : 65788 : if (g->goto_bindings.stmt_exprs > 0)
4242 : : {
4243 : 100 : auto_diagnostic_group d;
4244 : 100 : error_at (g->loc, "jump into statement expression");
4245 : 100 : inform (DECL_SOURCE_LOCATION (label), "label %qD defined here",
4246 : : label);
4247 : 100 : }
4248 : : }
4249 : :
4250 : : /* Now that the label is defined, we will issue warnings about
4251 : : subsequent gotos to this label when we see them. */
4252 : 6434 : vec_safe_truncate (label_vars->gotos, 0);
4253 : 6434 : label_vars->gotos = NULL;
4254 : 6434 : }
4255 : :
4256 : : /* Define a label, specifying the location in the source file.
4257 : : Return the LABEL_DECL node for the label, if the definition is valid.
4258 : : Otherwise return NULL_TREE. */
4259 : :
4260 : : tree
4261 : 22594 : define_label (location_t location, tree name)
4262 : : {
4263 : : /* Find any preexisting label with this name. It is an error
4264 : : if that label has already been defined in this function, or
4265 : : if there is a containing function with a declared label with
4266 : : the same name. */
4267 : 22594 : tree label = I_LABEL_DECL (name);
4268 : :
4269 : 6470 : if (label
4270 : 6470 : && ((DECL_CONTEXT (label) == current_function_decl
4271 : 6456 : && DECL_INITIAL (label) != NULL_TREE)
4272 : 6448 : || (DECL_CONTEXT (label) != current_function_decl
4273 : 14 : && C_DECLARED_LABEL_FLAG (label))))
4274 : : {
4275 : 29 : auto_diagnostic_group d;
4276 : 29 : error_at (location, "duplicate label %qD", label);
4277 : 29 : locate_old_decl (label);
4278 : 29 : return NULL_TREE;
4279 : 29 : }
4280 : 22565 : else if (label && DECL_CONTEXT (label) == current_function_decl)
4281 : : {
4282 : 6434 : struct c_label_vars *label_vars = I_LABEL_BINDING (name)->u.label;
4283 : :
4284 : : /* The label has been used or declared already in this function,
4285 : : but not defined. Update its location to point to this
4286 : : definition. */
4287 : 6434 : DECL_SOURCE_LOCATION (label) = location;
4288 : 6434 : set_spot_bindings (&label_vars->label_bindings, true);
4289 : :
4290 : : /* Issue warnings as required about any goto statements from
4291 : : earlier in the function. */
4292 : 6434 : check_earlier_gotos (label, label_vars);
4293 : : }
4294 : : else
4295 : : {
4296 : 16131 : struct c_label_vars *label_vars;
4297 : :
4298 : : /* No label binding for that identifier; make one. */
4299 : 16131 : label = make_label (location, name, true, &label_vars);
4300 : :
4301 : : /* Ordinary labels go in the current function scope. */
4302 : 16131 : bind_label (name, label, current_function_scope, label_vars);
4303 : : }
4304 : :
4305 : 22565 : if (!in_system_header_at (input_location) && lookup_name (name))
4306 : 113 : warning_at (location, OPT_Wtraditional,
4307 : : "traditional C lacks a separate namespace "
4308 : : "for labels, identifier %qE conflicts", name);
4309 : :
4310 : : /* Mark label as having been defined. */
4311 : 22565 : DECL_INITIAL (label) = error_mark_node;
4312 : 22565 : return label;
4313 : : }
4314 : :
4315 : : /* Get the bindings for a new switch statement. This is used to issue
4316 : : warnings as appropriate for jumps from the switch to case or
4317 : : default labels. */
4318 : :
4319 : : struct c_spot_bindings *
4320 : 36196 : c_get_switch_bindings (void)
4321 : : {
4322 : 36196 : struct c_spot_bindings *switch_bindings;
4323 : :
4324 : 36196 : switch_bindings = XNEW (struct c_spot_bindings);
4325 : 36196 : set_spot_bindings (switch_bindings, true);
4326 : 36196 : return switch_bindings;
4327 : : }
4328 : :
4329 : : void
4330 : 36196 : c_release_switch_bindings (struct c_spot_bindings *bindings)
4331 : : {
4332 : 36196 : gcc_assert (bindings->stmt_exprs == 0 && !bindings->left_stmt_expr);
4333 : 36196 : XDELETE (bindings);
4334 : 36196 : }
4335 : :
4336 : : /* This is called at the point of a case or default label to issue
4337 : : warnings about decls as needed. It returns true if it found an
4338 : : error, not just a warning. */
4339 : :
4340 : : bool
4341 : 1021507 : c_check_switch_jump_warnings (struct c_spot_bindings *switch_bindings,
4342 : : location_t switch_loc, location_t case_loc)
4343 : : {
4344 : 1021507 : bool saw_error;
4345 : 1021507 : struct c_scope *scope;
4346 : :
4347 : 1021507 : saw_error = false;
4348 : 1021507 : for (scope = current_scope;
4349 : 3064608 : scope != switch_bindings->scope;
4350 : 2043101 : scope = scope->outer)
4351 : : {
4352 : 2043101 : struct c_binding *b;
4353 : :
4354 : 2043101 : gcc_assert (scope != NULL);
4355 : :
4356 : 2043101 : if (!scope->has_jump_unsafe_decl)
4357 : 2043093 : continue;
4358 : :
4359 : 16 : for (b = scope->bindings; b != NULL; b = b->prev)
4360 : : {
4361 : 8 : if (decl_jump_unsafe (b->decl))
4362 : : {
4363 : 8 : auto_diagnostic_group d;
4364 : 8 : bool emitted;
4365 : 8 : if (c_type_variably_modified_p (TREE_TYPE (b->decl)))
4366 : : {
4367 : 3 : saw_error = true;
4368 : 3 : error_at (case_loc,
4369 : : ("switch jumps into scope of identifier with "
4370 : : "variably modified type"));
4371 : 3 : emitted = true;
4372 : : }
4373 : 5 : else if (flag_openmp
4374 : 7 : && lookup_attribute ("omp allocate",
4375 : 2 : DECL_ATTRIBUTES (b->decl)))
4376 : : {
4377 : 2 : saw_error = true;
4378 : 2 : error_at (case_loc,
4379 : : "switch jumps over OpenMP %<allocate%> allocation");
4380 : 2 : emitted = true;
4381 : : }
4382 : : else
4383 : 3 : emitted
4384 : 3 : = warning_at (case_loc, OPT_Wjump_misses_init,
4385 : : "switch jumps over variable initialization");
4386 : 8 : if (emitted)
4387 : : {
4388 : 8 : inform (switch_loc, "switch starts here");
4389 : 8 : inform (DECL_SOURCE_LOCATION (b->decl), "%qD declared here",
4390 : : b->decl);
4391 : : }
4392 : 8 : }
4393 : : }
4394 : : }
4395 : :
4396 : 1021507 : if (switch_bindings->stmt_exprs > 0)
4397 : : {
4398 : 4 : saw_error = true;
4399 : 4 : auto_diagnostic_group d;
4400 : 4 : error_at (case_loc, "switch jumps into statement expression");
4401 : 4 : inform (switch_loc, "switch starts here");
4402 : 4 : }
4403 : :
4404 : 1021507 : return saw_error;
4405 : : }
4406 : :
4407 : : /* Given NAME, an IDENTIFIER_NODE,
4408 : : return the structure (or union or enum) definition for that name.
4409 : : If THISLEVEL_ONLY is nonzero, searches only the current_scope.
4410 : : CODE says which kind of type the caller wants;
4411 : : it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
4412 : : If PLOC is not NULL and this returns non-null, it sets *PLOC to the
4413 : : location where the tag was defined.
4414 : : If the wrong kind of type is found, an error is reported. */
4415 : :
4416 : : static tree
4417 : 1949516 : lookup_tag (enum tree_code code, tree name, bool thislevel_only,
4418 : : location_t *ploc)
4419 : : {
4420 : 1949516 : struct c_binding *b = I_TAG_BINDING (name);
4421 : 1949516 : bool thislevel = false;
4422 : :
4423 : 1949516 : if (!b || !b->decl)
4424 : : return NULL_TREE;
4425 : :
4426 : : /* We only care about whether it's in this level if
4427 : : thislevel_only was set or it might be a type clash. */
4428 : 1363649 : if (thislevel_only || TREE_CODE (b->decl) != code)
4429 : : {
4430 : : /* For our purposes, a tag in the external scope is the same as
4431 : : a tag in the file scope. (Primarily relevant to Objective-C
4432 : : and its builtin structure tags, which get pushed before the
4433 : : file scope is created.) */
4434 : 441368 : if (B_IN_CURRENT_SCOPE (b)
4435 : 153 : || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b)))
4436 : 1363649 : thislevel = true;
4437 : : }
4438 : :
4439 : 1363649 : if (thislevel_only && !thislevel)
4440 : : return NULL_TREE;
4441 : :
4442 : 1363517 : if (TREE_CODE (b->decl) != code)
4443 : : {
4444 : : /* Definition isn't the kind we were looking for. */
4445 : 39 : pending_invalid_xref = name;
4446 : 39 : pending_invalid_xref_location = input_location;
4447 : :
4448 : : /* If in the same binding level as a declaration as a tag
4449 : : of a different type, this must not be allowed to
4450 : : shadow that tag, so give the error immediately.
4451 : : (For example, "struct foo; union foo;" is invalid.) */
4452 : 39 : if (thislevel)
4453 : 18 : pending_xref_error ();
4454 : : }
4455 : :
4456 : 1363517 : if (ploc != NULL)
4457 : 946601 : *ploc = b->locus;
4458 : :
4459 : 1363517 : return b->decl;
4460 : : }
4461 : :
4462 : : /* Return true if a definition exists for NAME with code CODE. */
4463 : :
4464 : : bool
4465 : 321 : tag_exists_p (enum tree_code code, tree name)
4466 : : {
4467 : 321 : struct c_binding *b = I_TAG_BINDING (name);
4468 : :
4469 : 321 : if (b == NULL || b->decl == NULL_TREE)
4470 : : return false;
4471 : 18 : return TREE_CODE (b->decl) == code;
4472 : : }
4473 : :
4474 : : /* Print an error message now
4475 : : for a recent invalid struct, union or enum cross reference.
4476 : : We don't print them immediately because they are not invalid
4477 : : when used in the `struct foo;' construct for shadowing. */
4478 : :
4479 : : void
4480 : 273926910 : pending_xref_error (void)
4481 : : {
4482 : 273926910 : if (pending_invalid_xref != NULL_TREE)
4483 : 27 : error_at (pending_invalid_xref_location, "%qE defined as wrong kind of tag",
4484 : : pending_invalid_xref);
4485 : 273926910 : pending_invalid_xref = NULL_TREE;
4486 : 273926910 : }
4487 : :
4488 : :
4489 : : /* Look up NAME in the current scope and its superiors
4490 : : in the namespace of variables, functions and typedefs.
4491 : : Return a ..._DECL node of some kind representing its definition,
4492 : : or return NULL_TREE if it is undefined. */
4493 : :
4494 : : tree
4495 : 1111721209 : lookup_name (tree name)
4496 : : {
4497 : 1111721209 : struct c_binding *b = I_SYMBOL_BINDING (name);
4498 : 1111721209 : if (b && !b->invisible)
4499 : : {
4500 : 740930273 : maybe_record_typedef_use (b->decl);
4501 : 740930273 : return b->decl;
4502 : : }
4503 : : return NULL_TREE;
4504 : : }
4505 : :
4506 : : /* Similar to `lookup_name' but look only at the indicated scope. */
4507 : :
4508 : : static tree
4509 : 112010779 : lookup_name_in_scope (tree name, struct c_scope *scope)
4510 : : {
4511 : 112010779 : struct c_binding *b;
4512 : :
4513 : 112013684 : for (b = I_SYMBOL_BINDING (name); b; b = b->shadowed)
4514 : 6261844 : if (B_IN_SCOPE (b, scope))
4515 : 6258939 : return b->decl;
4516 : : return NULL_TREE;
4517 : : }
4518 : :
4519 : : /* Look for the closest match for NAME within the currently valid
4520 : : scopes.
4521 : :
4522 : : This finds the identifier with the lowest Levenshtein distance to
4523 : : NAME. If there are multiple candidates with equal minimal distance,
4524 : : the first one found is returned. Scopes are searched from innermost
4525 : : outwards, and within a scope in reverse order of declaration, thus
4526 : : benefiting candidates "near" to the current scope.
4527 : :
4528 : : The function also looks for similar macro names to NAME, since a
4529 : : misspelled macro name will not be expanded, and hence looks like an
4530 : : identifier to the C frontend.
4531 : :
4532 : : It also looks for start_typename keywords, to detect "singed" vs "signed"
4533 : : typos.
4534 : :
4535 : : Use LOC for any deferred diagnostics. */
4536 : :
4537 : : name_hint
4538 : 2241 : lookup_name_fuzzy (tree name, enum lookup_name_fuzzy_kind kind, location_t loc)
4539 : : {
4540 : 2241 : gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
4541 : :
4542 : : /* First, try some well-known names in the C standard library, in case
4543 : : the user forgot a #include. */
4544 : 2241 : const char *header_hint
4545 : 2241 : = get_c_stdlib_header_for_name (IDENTIFIER_POINTER (name));
4546 : :
4547 : 2241 : if (header_hint)
4548 : 55 : return name_hint (NULL,
4549 : : new suggest_missing_header (loc,
4550 : 55 : IDENTIFIER_POINTER (name),
4551 : 55 : header_hint));
4552 : :
4553 : : /* Only suggest names reserved for the implementation if NAME begins
4554 : : with an underscore. */
4555 : 2186 : bool consider_implementation_names = (IDENTIFIER_POINTER (name)[0] == '_');
4556 : :
4557 : 2186 : best_match<tree, tree> bm (name);
4558 : :
4559 : : /* Look within currently valid scopes. */
4560 : 9614 : for (c_scope *scope = current_scope; scope; scope = scope->outer)
4561 : 11430182 : for (c_binding *binding = scope->bindings; binding; binding = binding->prev)
4562 : : {
4563 : 11422754 : if (!binding->id || binding->invisible)
4564 : 6473365 : continue;
4565 : 4949389 : if (binding->decl == error_mark_node)
4566 : 353 : continue;
4567 : : /* Don't use bindings from implicitly declared functions,
4568 : : as they were likely misspellings themselves. */
4569 : 4949036 : if (TREE_CODE (binding->decl) == FUNCTION_DECL)
4570 : 4540576 : if (C_DECL_IMPLICIT (binding->decl))
4571 : 229 : continue;
4572 : : /* Don't suggest names that are reserved for use by the
4573 : : implementation, unless NAME began with an underscore. */
4574 : 4948807 : if (!consider_implementation_names)
4575 : : {
4576 : 2088938 : const char *suggestion_str = IDENTIFIER_POINTER (binding->id);
4577 : 2088938 : if (name_reserved_for_implementation_p (suggestion_str))
4578 : 2033356 : continue;
4579 : : }
4580 : 2915451 : switch (kind)
4581 : : {
4582 : 29127 : case FUZZY_LOOKUP_TYPENAME:
4583 : 29127 : if (TREE_CODE (binding->decl) != TYPE_DECL)
4584 : 22334 : continue;
4585 : : break;
4586 : :
4587 : 115557 : case FUZZY_LOOKUP_FUNCTION_NAME:
4588 : 115557 : if (TREE_CODE (binding->decl) != FUNCTION_DECL)
4589 : : {
4590 : : /* Allow function pointers. */
4591 : 26259 : if ((VAR_P (binding->decl)
4592 : 21734 : || TREE_CODE (binding->decl) == PARM_DECL)
4593 : 5400 : && TREE_CODE (TREE_TYPE (binding->decl)) == POINTER_TYPE
4594 : 27539 : && (TREE_CODE (TREE_TYPE (TREE_TYPE (binding->decl)))
4595 : : == FUNCTION_TYPE))
4596 : : break;
4597 : 26240 : continue;
4598 : : }
4599 : : break;
4600 : :
4601 : : default:
4602 : : break;
4603 : : }
4604 : 2866877 : bm.consider (binding->id);
4605 : : }
4606 : :
4607 : : /* Consider macros: if the user misspelled a macro name e.g. "SOME_MACRO"
4608 : : as:
4609 : : x = SOME_OTHER_MACRO (y);
4610 : : then "SOME_OTHER_MACRO" will survive to the frontend and show up
4611 : : as a misspelled identifier.
4612 : :
4613 : : Use the best distance so far so that a candidate is only set if
4614 : : a macro is better than anything so far. This allows early rejection
4615 : : (without calculating the edit distance) of macro names that must have
4616 : : distance >= bm.get_best_distance (), and means that we only get a
4617 : : non-NULL result for best_macro_match if it's better than any of
4618 : : the identifiers already checked, which avoids needless creation
4619 : : of identifiers for macro hashnodes. */
4620 : 2186 : best_macro_match bmm (name, bm.get_best_distance (), parse_in);
4621 : 2186 : cpp_hashnode *best_macro = bmm.get_best_meaningful_candidate ();
4622 : : /* If a macro is the closest so far to NAME, use it, creating an
4623 : : identifier tree node for it. */
4624 : 2186 : if (best_macro)
4625 : : {
4626 : 11 : const char *id = (const char *)best_macro->ident.str;
4627 : 11 : tree macro_as_identifier
4628 : 11 : = get_identifier_with_length (id, best_macro->ident.len);
4629 : 11 : bm.set_best_so_far (macro_as_identifier,
4630 : : bmm.get_best_distance (),
4631 : : bmm.get_best_candidate_length ());
4632 : : }
4633 : :
4634 : : /* Try the "start_typename" keywords to detect
4635 : : "singed" vs "signed" typos. */
4636 : 2186 : if (kind == FUZZY_LOOKUP_TYPENAME)
4637 : : {
4638 : 47957 : for (unsigned i = 0; i < num_c_common_reswords; i++)
4639 : : {
4640 : 47740 : const c_common_resword *resword = &c_common_reswords[i];
4641 : 47740 : if (!c_keyword_starts_typename (resword->rid))
4642 : 36022 : continue;
4643 : 11718 : tree resword_identifier = ridpointers [resword->rid];
4644 : 11718 : if (!resword_identifier)
4645 : 30 : continue;
4646 : 11688 : gcc_assert (TREE_CODE (resword_identifier) == IDENTIFIER_NODE);
4647 : 11688 : bm.consider (resword_identifier);
4648 : : }
4649 : : }
4650 : :
4651 : 2186 : tree best = bm.get_best_meaningful_candidate ();
4652 : 2186 : if (best)
4653 : 272 : return name_hint (IDENTIFIER_POINTER (best), NULL);
4654 : : else
4655 : 1914 : return name_hint (NULL, NULL);
4656 : : }
4657 : :
4658 : :
4659 : : /* Handle the standard [[nodiscard]] attribute. */
4660 : :
4661 : : static tree
4662 : 26 : handle_nodiscard_attribute (tree *node, tree name, tree /*args*/,
4663 : : int /*flags*/, bool *no_add_attrs)
4664 : : {
4665 : 26 : if (TREE_CODE (*node) == FUNCTION_DECL)
4666 : : {
4667 : 10 : if (VOID_TYPE_P (TREE_TYPE (TREE_TYPE (*node))))
4668 : 1 : warning_at (DECL_SOURCE_LOCATION (*node),
4669 : : OPT_Wattributes, "%qE attribute applied to %qD with void "
4670 : : "return type", name, *node);
4671 : : }
4672 : 16 : else if (RECORD_OR_UNION_TYPE_P (*node)
4673 : 12 : || TREE_CODE (*node) == ENUMERAL_TYPE)
4674 : : /* OK */;
4675 : : else
4676 : : {
4677 : 10 : pedwarn (input_location,
4678 : : OPT_Wattributes, "%qE attribute can only be applied to "
4679 : : "functions or to structure, union or enumeration types", name);
4680 : 10 : *no_add_attrs = true;
4681 : : }
4682 : 26 : return NULL_TREE;
4683 : : }
4684 : :
4685 : : /* Handle the standard [[noreturn]] attribute. */
4686 : :
4687 : : static tree
4688 : 42 : handle_std_noreturn_attribute (tree *node, tree name, tree args,
4689 : : int flags, bool *no_add_attrs)
4690 : : {
4691 : : /* Unlike GNU __attribute__ ((noreturn)), the standard [[noreturn]]
4692 : : only applies to functions, not function pointers. */
4693 : 42 : if (TREE_CODE (*node) == FUNCTION_DECL)
4694 : 20 : return handle_noreturn_attribute (node, name, args, flags, no_add_attrs);
4695 : : else
4696 : : {
4697 : 22 : pedwarn (input_location, OPT_Wattributes,
4698 : : "standard %qE attribute can only be applied to functions",
4699 : : name);
4700 : 22 : *no_add_attrs = true;
4701 : 22 : return NULL_TREE;
4702 : : }
4703 : : }
4704 : :
4705 : : /* Table of supported standard (C23) attributes. */
4706 : : static const attribute_spec std_attributes[] =
4707 : : {
4708 : : /* { name, min_len, max_len, decl_req, type_req, fn_type_req,
4709 : : affects_type_identity, handler, exclude } */
4710 : : { "_Noreturn", 0, 0, false, false, false, false,
4711 : : handle_std_noreturn_attribute, NULL },
4712 : : { "deprecated", 0, 1, false, false, false, false,
4713 : : handle_deprecated_attribute, NULL },
4714 : : { "fallthrough", 0, 0, false, false, false, false,
4715 : : handle_fallthrough_attribute, NULL },
4716 : : { "maybe_unused", 0, 0, false, false, false, false,
4717 : : handle_unused_attribute, NULL },
4718 : : { "nodiscard", 0, 1, false, false, false, false,
4719 : : handle_nodiscard_attribute, NULL },
4720 : : { "noreturn", 0, 0, false, false, false, false,
4721 : : handle_std_noreturn_attribute, NULL }
4722 : : };
4723 : :
4724 : : const scoped_attribute_specs std_attribute_table =
4725 : : {
4726 : : nullptr, { std_attributes }
4727 : : };
4728 : :
4729 : : /* Create the predefined scalar types of C,
4730 : : and some nodes representing standard constants (0, 1, (void *) 0).
4731 : : Initialize the global scope.
4732 : : Make definitions for built-in primitive functions. */
4733 : :
4734 : : void
4735 : 107978 : c_init_decl_processing (void)
4736 : : {
4737 : 107978 : location_t save_loc = input_location;
4738 : :
4739 : : /* Initialize reserved words for parser. */
4740 : 107978 : c_parse_init ();
4741 : :
4742 : 107978 : current_function_decl = NULL_TREE;
4743 : :
4744 : 107978 : gcc_obstack_init (&parser_obstack);
4745 : :
4746 : : /* Make the externals scope. */
4747 : 107978 : push_scope ();
4748 : 107978 : external_scope = current_scope;
4749 : :
4750 : : /* Declarations from c_common_nodes_and_builtins must not be associated
4751 : : with this input file, lest we get differences between using and not
4752 : : using preprocessed headers. */
4753 : 107978 : input_location = BUILTINS_LOCATION;
4754 : :
4755 : 107978 : c_common_nodes_and_builtins ();
4756 : :
4757 : : /* In C, comparisons and TRUTH_* expressions have type int. */
4758 : 107978 : truthvalue_type_node = integer_type_node;
4759 : 107978 : truthvalue_true_node = integer_one_node;
4760 : 107978 : truthvalue_false_node = integer_zero_node;
4761 : :
4762 : : /* Even in C99, which has a real boolean type. */
4763 : 107978 : pushdecl (build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier ("_Bool"),
4764 : : boolean_type_node));
4765 : :
4766 : : /* C-specific nullptr initialization. */
4767 : 107978 : record_builtin_type (RID_MAX, "nullptr_t", nullptr_type_node);
4768 : : /* The size and alignment of nullptr_t is the same as for a pointer to
4769 : : character type. */
4770 : 107978 : SET_TYPE_ALIGN (nullptr_type_node, GET_MODE_ALIGNMENT (ptr_mode));
4771 : :
4772 : 107978 : input_location = save_loc;
4773 : :
4774 : 107978 : make_fname_decl = c_make_fname_decl;
4775 : 107978 : start_fname_decls ();
4776 : 107978 : }
4777 : :
4778 : : /* Create the VAR_DECL at LOC for __FUNCTION__ etc. ID is the name to
4779 : : give the decl, NAME is the initialization string and TYPE_DEP
4780 : : indicates whether NAME depended on the type of the function. As we
4781 : : don't yet implement delayed emission of static data, we mark the
4782 : : decl as emitted so it is not placed in the output. Anything using
4783 : : it must therefore pull out the STRING_CST initializer directly.
4784 : : FIXME. */
4785 : :
4786 : : static tree
4787 : 2520 : c_make_fname_decl (location_t loc, tree id, int type_dep)
4788 : : {
4789 : 2520 : const char *name = fname_as_string (type_dep);
4790 : 2520 : tree decl, type, init;
4791 : 2520 : size_t length = strlen (name);
4792 : :
4793 : 2520 : type = build_array_type (char_type_node,
4794 : : build_index_type (size_int (length)));
4795 : 2520 : type = c_build_qualified_type (type, TYPE_QUAL_CONST);
4796 : :
4797 : 2520 : decl = build_decl (loc, VAR_DECL, id, type);
4798 : :
4799 : 2520 : TREE_STATIC (decl) = 1;
4800 : 2520 : TREE_READONLY (decl) = 1;
4801 : 2520 : DECL_ARTIFICIAL (decl) = 1;
4802 : :
4803 : 2520 : init = build_string (length + 1, name);
4804 : 2520 : free (CONST_CAST (char *, name));
4805 : 2520 : TREE_TYPE (init) = type;
4806 : 2520 : DECL_INITIAL (decl) = init;
4807 : :
4808 : 2520 : TREE_USED (decl) = 1;
4809 : :
4810 : 2520 : if (current_function_decl
4811 : : /* For invalid programs like this:
4812 : :
4813 : : void foo()
4814 : : const char* p = __FUNCTION__;
4815 : :
4816 : : the __FUNCTION__ is believed to appear in K&R style function
4817 : : parameter declarator. In that case we still don't have
4818 : : function_scope. */
4819 : 2513 : && current_function_scope)
4820 : : {
4821 : 2505 : DECL_CONTEXT (decl) = current_function_decl;
4822 : 2505 : bind (id, decl, current_function_scope,
4823 : : /*invisible=*/false, /*nested=*/false, UNKNOWN_LOCATION);
4824 : : }
4825 : :
4826 : 2520 : finish_decl (decl, loc, init, NULL_TREE, NULL_TREE);
4827 : :
4828 : 2520 : return decl;
4829 : : }
4830 : :
4831 : : tree
4832 : 296450936 : c_builtin_function (tree decl)
4833 : : {
4834 : 296450936 : tree type = TREE_TYPE (decl);
4835 : 296450936 : tree id = DECL_NAME (decl);
4836 : :
4837 : 296450936 : const char *name = IDENTIFIER_POINTER (id);
4838 : 296450936 : C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type);
4839 : :
4840 : : /* Should never be called on a symbol with a preexisting meaning. */
4841 : 296450936 : gcc_assert (!I_SYMBOL_BINDING (id));
4842 : :
4843 : 296450936 : bind (id, decl, external_scope, /*invisible=*/true, /*nested=*/false,
4844 : : UNKNOWN_LOCATION);
4845 : :
4846 : : /* Builtins in the implementation namespace are made visible without
4847 : : needing to be explicitly declared. See push_file_scope. */
4848 : 296450936 : if (name[0] == '_' && (name[1] == '_' || ISUPPER (name[1])))
4849 : : {
4850 : 202381638 : DECL_CHAIN (decl) = visible_builtins;
4851 : 202381638 : visible_builtins = decl;
4852 : : }
4853 : :
4854 : 296450936 : return decl;
4855 : : }
4856 : :
4857 : : tree
4858 : 8738287 : c_builtin_function_ext_scope (tree decl)
4859 : : {
4860 : 8738287 : tree type = TREE_TYPE (decl);
4861 : 8738287 : tree id = DECL_NAME (decl);
4862 : :
4863 : 8738287 : const char *name = IDENTIFIER_POINTER (id);
4864 : 8738287 : C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type);
4865 : :
4866 : 8738287 : if (external_scope)
4867 : 8497057 : bind (id, decl, external_scope, /*invisible=*/false, /*nested=*/false,
4868 : : UNKNOWN_LOCATION);
4869 : :
4870 : : /* Builtins in the implementation namespace are made visible without
4871 : : needing to be explicitly declared. See push_file_scope. */
4872 : 8738287 : if (name[0] == '_' && (name[1] == '_' || ISUPPER (name[1])))
4873 : : {
4874 : 8738287 : DECL_CHAIN (decl) = visible_builtins;
4875 : 8738287 : visible_builtins = decl;
4876 : : }
4877 : :
4878 : 8738287 : return decl;
4879 : : }
4880 : :
4881 : : /* Implement LANG_HOOKS_SIMULATE_BUILTIN_FUNCTION_DECL. */
4882 : :
4883 : : tree
4884 : 0 : c_simulate_builtin_function_decl (tree decl)
4885 : : {
4886 : 0 : tree type = TREE_TYPE (decl);
4887 : 0 : C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type);
4888 : 0 : return pushdecl (decl);
4889 : : }
4890 : :
4891 : : /* Warn about attributes in a context where they are unused
4892 : : (attribute-declarations, except for the "fallthrough" case, and
4893 : : attributes on statements). */
4894 : :
4895 : : void
4896 : 36836644 : c_warn_unused_attributes (tree attrs)
4897 : : {
4898 : 36836674 : for (tree t = attrs; t != NULL_TREE; t = TREE_CHAIN (t))
4899 : 30 : if (get_attribute_namespace (t) == NULL_TREE)
4900 : : /* The specifications of standard attributes mean this is a
4901 : : constraint violation. */
4902 : 17 : pedwarn (input_location, OPT_Wattributes, "%qE attribute ignored",
4903 : : get_attribute_name (t));
4904 : 13 : else if (!attribute_ignored_p (t))
4905 : 9 : warning (OPT_Wattributes, "%qE attribute ignored",
4906 : : get_attribute_name (t));
4907 : 36836644 : }
4908 : :
4909 : : /* Warn for standard attributes being applied to a type that is not
4910 : : being defined, where that is a constraint violation, and return a
4911 : : list of attributes with them removed. */
4912 : :
4913 : : tree
4914 : 379608721 : c_warn_type_attributes (tree attrs)
4915 : : {
4916 : 379608721 : tree *attr_ptr = &attrs;
4917 : 379631053 : while (*attr_ptr)
4918 : 22332 : if (get_attribute_namespace (*attr_ptr) == NULL_TREE)
4919 : : {
4920 : 21 : pedwarn (input_location, OPT_Wattributes, "%qE attribute ignored",
4921 : : get_attribute_name (*attr_ptr));
4922 : 21 : *attr_ptr = TREE_CHAIN (*attr_ptr);
4923 : : }
4924 : : else
4925 : 22311 : attr_ptr = &TREE_CHAIN (*attr_ptr);
4926 : 379608721 : return attrs;
4927 : : }
4928 : :
4929 : : /* Called when a declaration is seen that contains no names to declare.
4930 : : If its type is a reference to a structure, union or enum inherited
4931 : : from a containing scope, shadow that tag name for the current scope
4932 : : with a forward reference.
4933 : : If its type defines a new named structure or union
4934 : : or defines an enum, it is valid but we need not do anything here.
4935 : : Otherwise, it is an error. */
4936 : :
4937 : : void
4938 : 471085 : shadow_tag (const struct c_declspecs *declspecs)
4939 : : {
4940 : 471085 : shadow_tag_warned (declspecs, 0);
4941 : 471085 : }
4942 : :
4943 : : /* WARNED is 1 if we have done a pedwarn, 2 if we have done a warning,
4944 : : but no pedwarn. */
4945 : : void
4946 : 471144 : shadow_tag_warned (const struct c_declspecs *declspecs, int warned)
4947 : : {
4948 : 471144 : bool found_tag = false;
4949 : :
4950 : 471144 : if (declspecs->type && !declspecs->default_int_p && !declspecs->typedef_p)
4951 : : {
4952 : 471041 : tree value = declspecs->type;
4953 : 471041 : enum tree_code code = TREE_CODE (value);
4954 : :
4955 : 471041 : if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE)
4956 : : /* Used to test also that TYPE_SIZE (value) != 0.
4957 : : That caused warning for `struct foo;' at top level in the file. */
4958 : : {
4959 : 471000 : tree name = TYPE_NAME (value);
4960 : 471000 : tree t;
4961 : :
4962 : 471000 : found_tag = true;
4963 : :
4964 : 471000 : if (declspecs->restrict_p)
4965 : : {
4966 : 2 : error ("invalid use of %<restrict%>");
4967 : 2 : warned = 1;
4968 : : }
4969 : :
4970 : 471000 : if (in_underspecified_init)
4971 : : {
4972 : : /* This can only occur with extensions such as statement
4973 : : expressions, but is still appropriate as an error to
4974 : : avoid types declared in such a context escaping to
4975 : : the type of an auto variable. */
4976 : 1 : error ("%qT declared in underspecified object initializer",
4977 : : value);
4978 : 1 : warned = 1;
4979 : : }
4980 : :
4981 : 471000 : if (name == NULL_TREE)
4982 : : {
4983 : 54075 : if (warned != 1 && code != ENUMERAL_TYPE)
4984 : : /* Empty unnamed enum OK */
4985 : : {
4986 : 17 : pedwarn (input_location, 0,
4987 : : "unnamed struct/union that defines no instances");
4988 : 17 : warned = 1;
4989 : : }
4990 : : }
4991 : 416925 : else if (declspecs->typespec_kind != ctsk_tagdef
4992 : 83575 : && declspecs->typespec_kind != ctsk_tagfirstref
4993 : 24776 : && declspecs->typespec_kind != ctsk_tagfirstref_attrs
4994 : 24768 : && declspecs->storage_class != csc_none)
4995 : : {
4996 : 1 : if (warned != 1)
4997 : 1 : pedwarn (input_location, 0,
4998 : : "empty declaration with storage class specifier "
4999 : : "does not redeclare tag");
5000 : 1 : warned = 1;
5001 : 1 : pending_xref_error ();
5002 : : }
5003 : 416924 : else if (declspecs->typespec_kind != ctsk_tagdef
5004 : 83574 : && declspecs->typespec_kind != ctsk_tagfirstref
5005 : 24775 : && declspecs->typespec_kind != ctsk_tagfirstref_attrs
5006 : 24767 : && (declspecs->const_p
5007 : : || declspecs->volatile_p
5008 : : || declspecs->atomic_p
5009 : : || declspecs->restrict_p
5010 : 24767 : || declspecs->address_space))
5011 : : {
5012 : 3 : if (warned != 1)
5013 : 3 : pedwarn (input_location, 0,
5014 : : "empty declaration with type qualifier "
5015 : : "does not redeclare tag");
5016 : 3 : warned = 1;
5017 : 3 : pending_xref_error ();
5018 : : }
5019 : 416921 : else if (declspecs->typespec_kind != ctsk_tagdef
5020 : 83571 : && declspecs->typespec_kind != ctsk_tagfirstref
5021 : 24772 : && declspecs->typespec_kind != ctsk_tagfirstref_attrs
5022 : 24764 : && declspecs->alignas_p)
5023 : : {
5024 : 1 : if (warned != 1)
5025 : 1 : pedwarn (input_location, 0,
5026 : : "empty declaration with %<_Alignas%> "
5027 : : "does not redeclare tag");
5028 : 1 : warned = 1;
5029 : 1 : pending_xref_error ();
5030 : : }
5031 : 416920 : else if (declspecs->typespec_kind != ctsk_tagdef
5032 : 83570 : && declspecs->typespec_kind != ctsk_tagfirstref
5033 : 24771 : && declspecs->typespec_kind != ctsk_tagfirstref_attrs
5034 : 24763 : && code == ENUMERAL_TYPE
5035 : 15 : && !declspecs->enum_type_specifier_ref_p)
5036 : : {
5037 : 3 : bool warned_enum = false;
5038 : 3 : if (warned != 1)
5039 : 3 : warned_enum = pedwarn (input_location, OPT_Wpedantic,
5040 : : "empty declaration of %<enum%> type "
5041 : : "does not redeclare tag");
5042 : 3 : if (warned_enum)
5043 : 2 : warned = 1;
5044 : 3 : pending_xref_error ();
5045 : 3 : }
5046 : : else
5047 : : {
5048 : 416917 : pending_invalid_xref = NULL_TREE;
5049 : 416917 : t = lookup_tag (code, name, true, NULL);
5050 : :
5051 : 416917 : if (t == NULL_TREE)
5052 : : {
5053 : 1 : t = make_node (code);
5054 : 1 : pushtag (input_location, name, t);
5055 : : }
5056 : : }
5057 : : }
5058 : : else
5059 : : {
5060 : 41 : if (warned != 1 && !in_system_header_at (input_location))
5061 : : {
5062 : 38 : pedwarn (input_location, 0,
5063 : : "useless type name in empty declaration");
5064 : 38 : warned = 1;
5065 : : }
5066 : : }
5067 : : }
5068 : 64 : else if (warned != 1 && !in_system_header_at (input_location)
5069 : 167 : && declspecs->typedef_p)
5070 : : {
5071 : 11 : pedwarn (input_location, 0, "useless type name in empty declaration");
5072 : 11 : warned = 1;
5073 : : }
5074 : :
5075 : 471144 : pending_invalid_xref = NULL_TREE;
5076 : :
5077 : 471144 : if (declspecs->inline_p)
5078 : : {
5079 : 5 : error ("%<inline%> in empty declaration");
5080 : 5 : warned = 1;
5081 : : }
5082 : :
5083 : 471144 : if (declspecs->noreturn_p)
5084 : : {
5085 : 2 : error ("%<_Noreturn%> in empty declaration");
5086 : 2 : warned = 1;
5087 : : }
5088 : :
5089 : 471144 : if (declspecs->constexpr_p)
5090 : : {
5091 : 7 : error ("%<constexpr%> in empty declaration");
5092 : 7 : warned = 1;
5093 : : }
5094 : :
5095 : 471144 : if (current_scope == file_scope && declspecs->storage_class == csc_auto)
5096 : : {
5097 : 2 : error ("%<auto%> in file-scope empty declaration");
5098 : 2 : warned = 1;
5099 : : }
5100 : :
5101 : 471144 : if (current_scope == file_scope && declspecs->storage_class == csc_register)
5102 : : {
5103 : 2 : error ("%<register%> in file-scope empty declaration");
5104 : 2 : warned = 1;
5105 : : }
5106 : :
5107 : 471144 : if (declspecs->enum_type_specifier_ref_p && !warned)
5108 : : {
5109 : 39 : if (declspecs->storage_class != csc_none)
5110 : : {
5111 : 1 : error ("storage class specifier in empty declaration with %<enum%> "
5112 : : "underlying type");
5113 : 1 : warned = 1;
5114 : : }
5115 : 38 : else if (declspecs->thread_p)
5116 : : {
5117 : 2 : error ("%qs in empty declaration with %<enum%> underlying type",
5118 : 1 : declspecs->thread_gnu_p ? "__thread" : "_Thread_local");
5119 : 1 : warned = 1;
5120 : : }
5121 : 37 : else if (declspecs->const_p
5122 : : || declspecs->volatile_p
5123 : : || declspecs->atomic_p
5124 : : || declspecs->restrict_p
5125 : 37 : || declspecs->address_space)
5126 : : {
5127 : 1 : error ("type qualifier in empty declaration with %<enum%> "
5128 : : "underlying type");
5129 : 1 : warned = 1;
5130 : : }
5131 : 36 : else if (declspecs->alignas_p)
5132 : : {
5133 : 1 : error ("%<alignas%> in empty declaration with %<enum%> "
5134 : : "underlying type");
5135 : 1 : warned = 1;
5136 : : }
5137 : : }
5138 : :
5139 : 470996 : if (!warned && !in_system_header_at (input_location)
5140 : 585366 : && declspecs->storage_class != csc_none)
5141 : : {
5142 : 11 : warning (0, "useless storage class specifier in empty declaration");
5143 : 11 : warned = 2;
5144 : : }
5145 : :
5146 : 471144 : if (!warned && !in_system_header_at (input_location) && declspecs->thread_p)
5147 : : {
5148 : 6 : warning (0, "useless %qs in empty declaration",
5149 : 3 : declspecs->thread_gnu_p ? "__thread" : "_Thread_local");
5150 : 3 : warned = 2;
5151 : : }
5152 : :
5153 : 3 : if (!warned
5154 : 470978 : && !in_system_header_at (input_location)
5155 : 471141 : && (declspecs->const_p
5156 : : || declspecs->volatile_p
5157 : : || declspecs->atomic_p
5158 : : || declspecs->restrict_p
5159 : 114216 : || declspecs->address_space))
5160 : : {
5161 : 8 : warning (0, "useless type qualifier in empty declaration");
5162 : 8 : warned = 2;
5163 : : }
5164 : :
5165 : 470978 : if (!warned && !in_system_header_at (input_location)
5166 : 585344 : && declspecs->alignas_p)
5167 : : {
5168 : 4 : warning (0, "useless %<_Alignas%> in empty declaration");
5169 : 4 : warned = 2;
5170 : : }
5171 : :
5172 : 471144 : if (found_tag
5173 : 471144 : && warned == 2
5174 : 22 : && (declspecs->typespec_kind == ctsk_tagref_attrs
5175 : 22 : || declspecs->typespec_kind == ctsk_tagfirstref_attrs))
5176 : : {
5177 : : /* Standard attributes after the "struct" or "union" keyword are
5178 : : only permitted when the contents of the type are defined, or
5179 : : in the form "struct-or-union attribute-specifier-sequence
5180 : : identifier;". If the ';' was not present, attributes were
5181 : : diagnosed in the parser. Here, ensure that any other useless
5182 : : elements of the declaration result in a pedwarn, not just a
5183 : : warning. Forward declarations of enum types are not part of
5184 : : standard C, but handle them the same. */
5185 : 2 : pedwarn (input_location, 0,
5186 : : "invalid use of attributes in empty declaration");
5187 : 2 : warned = 1;
5188 : : }
5189 : :
5190 : 471144 : if (warned != 1)
5191 : : {
5192 : 470990 : if (declspecs->declspecs_seen_p
5193 : 470990 : && !declspecs->non_std_attrs_seen_p)
5194 : : /* An attribute declaration (but not a fallthrough attribute
5195 : : declaration, which was handled separately); warn if there
5196 : : are any attributes being ignored (but not if the attributes
5197 : : were empty). */
5198 : 42 : c_warn_unused_attributes (declspecs->attrs);
5199 : 470948 : else if (!found_tag)
5200 : 9 : pedwarn (input_location, 0, "empty declaration");
5201 : : }
5202 : 471144 : }
5203 : :
5204 : :
5205 : : /* Return the qualifiers from SPECS as a bitwise OR of TYPE_QUAL_*
5206 : : bits. SPECS represents declaration specifiers that the grammar
5207 : : only permits to contain type qualifiers and attributes. */
5208 : :
5209 : : int
5210 : 16599146 : quals_from_declspecs (const struct c_declspecs *specs)
5211 : : {
5212 : 16599146 : int quals = ((specs->const_p ? TYPE_QUAL_CONST : 0)
5213 : : | (specs->volatile_p ? TYPE_QUAL_VOLATILE : 0)
5214 : : | (specs->restrict_p ? TYPE_QUAL_RESTRICT : 0)
5215 : 16599146 : | (specs->atomic_p ? TYPE_QUAL_ATOMIC : 0)
5216 : 16599146 : | (ENCODE_QUAL_ADDR_SPACE (specs->address_space)));
5217 : 16599146 : gcc_assert (!specs->type
5218 : : && !specs->decl_attr
5219 : : && specs->typespec_word == cts_none
5220 : : && specs->storage_class == csc_none
5221 : : && !specs->typedef_p
5222 : : && !specs->explicit_signed_p
5223 : : && !specs->deprecated_p
5224 : : && !specs->unavailable_p
5225 : : && !specs->long_p
5226 : : && !specs->long_long_p
5227 : : && !specs->short_p
5228 : : && !specs->signed_p
5229 : : && !specs->unsigned_p
5230 : : && !specs->complex_p
5231 : : && !specs->inline_p
5232 : : && !specs->noreturn_p
5233 : : && !specs->thread_p);
5234 : 16599146 : return quals;
5235 : : }
5236 : :
5237 : : /* Construct an array declarator. LOC is the location of the
5238 : : beginning of the array (usually the opening brace). EXPR is the
5239 : : expression inside [], or NULL_TREE. QUALS are the type qualifiers
5240 : : inside the [] (to be applied to the pointer to which a parameter
5241 : : array is converted). STATIC_P is true if "static" is inside the
5242 : : [], false otherwise. VLA_UNSPEC_P is true if the array is [*], a
5243 : : VLA of unspecified length which is nevertheless a complete type,
5244 : : false otherwise. The field for the contained declarator is left to
5245 : : be filled in by set_array_declarator_inner. */
5246 : :
5247 : : struct c_declarator *
5248 : 1062908 : build_array_declarator (location_t loc,
5249 : : tree expr, struct c_declspecs *quals, bool static_p,
5250 : : bool vla_unspec_p)
5251 : : {
5252 : 1062908 : struct c_declarator *declarator = XOBNEW (&parser_obstack,
5253 : : struct c_declarator);
5254 : 1062908 : declarator->id_loc = loc;
5255 : 1062908 : declarator->kind = cdk_array;
5256 : 1062908 : declarator->declarator = 0;
5257 : 1062908 : declarator->u.array.dimen = expr;
5258 : 1062908 : if (quals)
5259 : : {
5260 : 742 : declarator->u.array.attrs = quals->attrs;
5261 : 742 : declarator->u.array.quals = quals_from_declspecs (quals);
5262 : : }
5263 : : else
5264 : : {
5265 : 1062166 : declarator->u.array.attrs = NULL_TREE;
5266 : 1062166 : declarator->u.array.quals = 0;
5267 : : }
5268 : 1062908 : declarator->u.array.static_p = static_p;
5269 : 1062908 : declarator->u.array.vla_unspec_p = vla_unspec_p;
5270 : 1062908 : if (static_p || quals != NULL)
5271 : 837 : pedwarn_c90 (loc, OPT_Wpedantic,
5272 : : "ISO C90 does not support %<static%> or type "
5273 : : "qualifiers in parameter array declarators");
5274 : 1062908 : if (vla_unspec_p)
5275 : 137 : pedwarn_c90 (loc, OPT_Wpedantic,
5276 : : "ISO C90 does not support %<[*]%> array declarators");
5277 : 137 : if (vla_unspec_p)
5278 : : {
5279 : 137 : if (!current_scope->parm_flag)
5280 : : {
5281 : : /* C99 6.7.5.2p4 */
5282 : 4 : error_at (loc, "%<[*]%> not allowed in other than "
5283 : : "function prototype scope");
5284 : 4 : declarator->u.array.vla_unspec_p = false;
5285 : 4 : return NULL;
5286 : : }
5287 : 133 : current_scope->had_vla_unspec = true;
5288 : : }
5289 : : return declarator;
5290 : : }
5291 : :
5292 : : /* Set the contained declarator of an array declarator. DECL is the
5293 : : declarator, as constructed by build_array_declarator; INNER is what
5294 : : appears on the left of the []. */
5295 : :
5296 : : struct c_declarator *
5297 : 1062904 : set_array_declarator_inner (struct c_declarator *decl,
5298 : : struct c_declarator *inner)
5299 : : {
5300 : 1062904 : decl->declarator = inner;
5301 : 1062904 : return decl;
5302 : : }
5303 : :
5304 : : /* Determine whether TYPE is a ISO C99 flexible array memeber type "[]". */
5305 : : static bool
5306 : 4925495 : flexible_array_member_type_p (const_tree type)
5307 : : {
5308 : 4925495 : if (TREE_CODE (type) == ARRAY_TYPE
5309 : 1615999 : && TYPE_SIZE (type) == NULL_TREE
5310 : 179160 : && TYPE_DOMAIN (type) != NULL_TREE
5311 : 5104655 : && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) == NULL_TREE)
5312 : 179160 : return true;
5313 : :
5314 : : return false;
5315 : : }
5316 : :
5317 : : /* Determine whether TYPE is a one-element array type "[1]". */
5318 : : static bool
5319 : 487486 : one_element_array_type_p (const_tree type)
5320 : : {
5321 : 487486 : if (TREE_CODE (type) != ARRAY_TYPE)
5322 : : return false;
5323 : 487486 : return integer_zerop (array_type_nelts (type));
5324 : : }
5325 : :
5326 : : /* Determine whether TYPE is a zero-length array type "[0]". */
5327 : : static bool
5328 : 487486 : zero_length_array_type_p (const_tree type)
5329 : : {
5330 : 487486 : if (TREE_CODE (type) == ARRAY_TYPE)
5331 : 487486 : if (tree type_size = TYPE_SIZE_UNIT (type))
5332 : 427830 : if ((integer_zerop (type_size))
5333 : 1816 : && TYPE_DOMAIN (type) != NULL_TREE
5334 : 429646 : && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) == NULL_TREE)
5335 : : return true;
5336 : : return false;
5337 : : }
5338 : :
5339 : : /* INIT is a constructor that forms DECL's initializer. If the final
5340 : : element initializes a flexible array field, add the size of that
5341 : : initializer to DECL's size. */
5342 : :
5343 : : static void
5344 : 101629 : add_flexible_array_elts_to_size (tree decl, tree init)
5345 : : {
5346 : 101629 : tree elt, type;
5347 : :
5348 : 101629 : if (vec_safe_is_empty (CONSTRUCTOR_ELTS (init)))
5349 : 1310 : return;
5350 : :
5351 : 100319 : elt = CONSTRUCTOR_ELTS (init)->last ().value;
5352 : 100319 : type = TREE_TYPE (elt);
5353 : 100319 : if (flexible_array_member_type_p (type))
5354 : : {
5355 : 180 : complete_array_type (&type, elt, false);
5356 : 180 : DECL_SIZE (decl)
5357 : 180 : = size_binop (PLUS_EXPR, DECL_SIZE (decl), TYPE_SIZE (type));
5358 : 180 : DECL_SIZE_UNIT (decl)
5359 : 360 : = size_binop (PLUS_EXPR, DECL_SIZE_UNIT (decl), TYPE_SIZE_UNIT (type));
5360 : : }
5361 : : }
5362 : :
5363 : : /* Decode a "typename", such as "int **", returning a ..._TYPE node.
5364 : : Set *EXPR, if EXPR not NULL, to any expression to be evaluated
5365 : : before the type name, and set *EXPR_CONST_OPERANDS, if
5366 : : EXPR_CONST_OPERANDS not NULL, to indicate whether the type name may
5367 : : appear in a constant expression. */
5368 : :
5369 : : tree
5370 : 105194718 : groktypename (struct c_type_name *type_name, tree *expr,
5371 : : bool *expr_const_operands)
5372 : : {
5373 : 105194718 : tree type;
5374 : 105194718 : tree attrs = type_name->specs->attrs;
5375 : :
5376 : 105194718 : type_name->specs->attrs = NULL_TREE;
5377 : :
5378 : 105194718 : type = grokdeclarator (type_name->declarator, type_name->specs, TYPENAME,
5379 : : false, NULL, &attrs, expr, expr_const_operands,
5380 : : DEPRECATED_NORMAL);
5381 : :
5382 : : /* Apply attributes. */
5383 : 105194718 : attrs = c_warn_type_attributes (attrs);
5384 : 105194718 : decl_attributes (&type, attrs, 0);
5385 : :
5386 : 105194718 : return type;
5387 : : }
5388 : :
5389 : : /* Looks up the most recent pushed declaration corresponding to DECL. */
5390 : :
5391 : : static tree
5392 : 82044548 : lookup_last_decl (tree decl)
5393 : : {
5394 : 82044548 : tree last_decl = lookup_name (DECL_NAME (decl));
5395 : 82044548 : if (!last_decl)
5396 : 80248879 : last_decl = lookup_name_in_scope (DECL_NAME (decl), external_scope);
5397 : 82044548 : return last_decl;
5398 : : }
5399 : :
5400 : : /* Wrapper for decl_attributes that adds some implicit attributes
5401 : : to VAR_DECLs or FUNCTION_DECLs. */
5402 : :
5403 : : static tree
5404 : 56903224 : c_decl_attributes (tree *node, tree attributes, int flags)
5405 : : {
5406 : : /* Add implicit "omp declare target" attribute if requested. */
5407 : 56903224 : if (vec_safe_length (current_omp_declare_target_attribute)
5408 : 9061 : && ((VAR_P (*node) && is_global_var (*node))
5409 : 2649 : || TREE_CODE (*node) == FUNCTION_DECL))
5410 : : {
5411 : 1067 : if (VAR_P (*node) && !omp_mappable_type (TREE_TYPE (*node)))
5412 : 13 : attributes = tree_cons (get_identifier ("omp declare target implicit"),
5413 : : NULL_TREE, attributes);
5414 : : else
5415 : : {
5416 : 1054 : attributes = tree_cons (get_identifier ("omp declare target"),
5417 : : NULL_TREE, attributes);
5418 : 1054 : attributes = tree_cons (get_identifier ("omp declare target block"),
5419 : : NULL_TREE, attributes);
5420 : : }
5421 : 1067 : if (TREE_CODE (*node) == FUNCTION_DECL)
5422 : : {
5423 : 939 : int device_type
5424 : 939 : = current_omp_declare_target_attribute->last ().device_type;
5425 : 939 : device_type = MAX (device_type, 0);
5426 : 939 : if ((device_type & OMP_CLAUSE_DEVICE_TYPE_HOST) != 0
5427 : 939 : && !lookup_attribute ("omp declare target host", attributes))
5428 : 2 : attributes
5429 : 2 : = tree_cons (get_identifier ("omp declare target host"),
5430 : : NULL_TREE, attributes);
5431 : 939 : if ((device_type & OMP_CLAUSE_DEVICE_TYPE_NOHOST) != 0
5432 : 939 : && !lookup_attribute ("omp declare target nohost", attributes))
5433 : 2 : attributes
5434 : 2 : = tree_cons (get_identifier ("omp declare target nohost"),
5435 : : NULL_TREE, attributes);
5436 : :
5437 : 939 : int indirect
5438 : 939 : = current_omp_declare_target_attribute->last ().indirect;
5439 : 939 : if (indirect && !lookup_attribute ("omp declare target indirect",
5440 : : attributes))
5441 : 10 : attributes
5442 : 10 : = tree_cons (get_identifier ("omp declare target indirect"),
5443 : : NULL_TREE, attributes);
5444 : : }
5445 : : }
5446 : :
5447 : 56903224 : if (flag_openmp || flag_openmp_simd)
5448 : : {
5449 : : bool diagnosed = false;
5450 : 1158575 : for (tree *pa = &attributes; *pa; )
5451 : : {
5452 : 749902 : if (is_attribute_namespace_p ("omp", *pa))
5453 : : {
5454 : 58 : tree name = get_attribute_name (*pa);
5455 : 58 : if (is_attribute_p ("directive", name)
5456 : 0 : || is_attribute_p ("sequence", name)
5457 : 58 : || is_attribute_p ("decl", name))
5458 : : {
5459 : 58 : const char *p = NULL;
5460 : 58 : if (TREE_VALUE (*pa) == NULL_TREE)
5461 : 12 : p = IDENTIFIER_POINTER (name);
5462 : 104 : for (tree a = TREE_VALUE (*pa); a; a = TREE_CHAIN (a))
5463 : : {
5464 : 46 : tree d = TREE_VALUE (a);
5465 : 46 : gcc_assert (TREE_CODE (d) == C_TOKEN_VEC);
5466 : 82 : if (TREE_PUBLIC (d)
5467 : 36 : && (VAR_P (*node)
5468 : 2 : || TREE_CODE (*node) == FUNCTION_DECL)
5469 : 82 : && c_maybe_parse_omp_decl (*node, d))
5470 : 36 : continue;
5471 : 10 : p = TREE_PUBLIC (d) ? "decl" : "directive";
5472 : : }
5473 : 58 : if (p && !diagnosed)
5474 : : {
5475 : 22 : error ("%<omp::%s%> not allowed to be specified in "
5476 : : "this context", p);
5477 : 22 : diagnosed = true;
5478 : : }
5479 : 58 : if (p)
5480 : : {
5481 : 22 : *pa = TREE_CHAIN (*pa);
5482 : 22 : continue;
5483 : : }
5484 : : }
5485 : : }
5486 : 749880 : pa = &TREE_CHAIN (*pa);
5487 : : }
5488 : : }
5489 : :
5490 : : /* Look up the current declaration with all the attributes merged
5491 : : so far so that attributes on the current declaration that's
5492 : : about to be pushed that conflict with the former can be detected,
5493 : : diagnosed, and rejected as appropriate. */
5494 : 56903224 : tree last_decl = lookup_last_decl (*node);
5495 : 56903224 : return decl_attributes (node, attributes, flags, last_decl);
5496 : : }
5497 : :
5498 : :
5499 : : /* Decode a declarator in an ordinary declaration or data definition.
5500 : : This is called as soon as the type information and variable name
5501 : : have been parsed, before parsing the initializer if any.
5502 : : Here we create the ..._DECL node, fill in its type,
5503 : : and (if DO_PUSH) put it on the list of decls for the current context.
5504 : : When nonnull, set *LASTLOC to the location of the prior declaration
5505 : : of the same entity if one exists.
5506 : : The ..._DECL node is returned as the value.
5507 : :
5508 : : Exception: for arrays where the length is not specified,
5509 : : the type is left null, to be filled in by `finish_decl'.
5510 : :
5511 : : Function definitions do not come here; they go to start_function
5512 : : instead. However, external and forward declarations of functions
5513 : : do go through here. Structure field declarations are done by
5514 : : grokfield and not through here. */
5515 : :
5516 : : tree
5517 : 25141347 : start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs,
5518 : : bool initialized, tree attributes, bool do_push /* = true */,
5519 : : location_t *lastloc /* = NULL */)
5520 : : {
5521 : 25141347 : tree decl;
5522 : 25141347 : tree old_decl;
5523 : 25141347 : tree tem;
5524 : 25141347 : tree expr = NULL_TREE;
5525 : 25141347 : enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
5526 : :
5527 : : /* An object declared as __attribute__((unavailable)) suppresses
5528 : : warnings and errors from __attribute__((deprecated/unavailable))
5529 : : components.
5530 : : An object declared as __attribute__((deprecated)) suppresses
5531 : : warnings of uses of other deprecated items. */
5532 : 25141347 : if (lookup_attribute ("unavailable", attributes))
5533 : : deprecated_state = UNAVAILABLE_DEPRECATED_SUPPRESS;
5534 : 25141323 : else if (lookup_attribute ("deprecated", attributes))
5535 : 29007 : deprecated_state = DEPRECATED_SUPPRESS;
5536 : :
5537 : 25141347 : decl = grokdeclarator (declarator, declspecs,
5538 : : NORMAL, initialized, NULL, &attributes, &expr, NULL,
5539 : : deprecated_state);
5540 : 25141347 : if (!decl || decl == error_mark_node)
5541 : : return NULL_TREE;
5542 : :
5543 : 25141324 : old_decl = lookup_last_decl (decl);
5544 : :
5545 : 25141324 : if (tree lastdecl = lastloc ? old_decl : NULL_TREE)
5546 : 3807069 : if (lastdecl != error_mark_node)
5547 : 3807060 : *lastloc = DECL_SOURCE_LOCATION (lastdecl);
5548 : :
5549 : : /* Make sure the size expression is evaluated at this point. */
5550 : 25141324 : if (expr && !current_scope->parm_flag)
5551 : 12810 : add_stmt (fold_convert (void_type_node, expr));
5552 : :
5553 : 12711486 : if (TREE_CODE (decl) != FUNCTION_DECL && MAIN_NAME_P (DECL_NAME (decl))
5554 : 25141326 : && TREE_PUBLIC (decl))
5555 : 1 : warning (OPT_Wmain, "%q+D is usually a function", decl);
5556 : :
5557 : 14 : if (warn_missing_variable_declarations && VAR_P (decl)
5558 : 25141337 : && !DECL_EXTERNAL (decl) && TREE_PUBLIC (decl) && old_decl == NULL_TREE)
5559 : 5 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wmissing_variable_declarations,
5560 : : "no previous declaration for %qD", decl);
5561 : :
5562 : 25141324 : if (initialized)
5563 : : /* Is it valid for this decl to have an initializer at all?
5564 : : If not, set INITIALIZED to zero, which will indirectly
5565 : : tell 'finish_decl' to ignore the initializer once it is parsed. */
5566 : 6132171 : switch (TREE_CODE (decl))
5567 : : {
5568 : 2 : case TYPE_DECL:
5569 : 2 : error ("typedef %qD is initialized (use %<__typeof__%> instead)", decl);
5570 : 2 : initialized = false;
5571 : 2 : break;
5572 : :
5573 : 9 : case FUNCTION_DECL:
5574 : 9 : error ("function %qD is initialized like a variable", decl);
5575 : 9 : initialized = false;
5576 : 9 : break;
5577 : :
5578 : 49 : case PARM_DECL:
5579 : : /* DECL_INITIAL in a PARM_DECL is really DECL_ARG_TYPE. */
5580 : 49 : error ("parameter %qD is initialized", decl);
5581 : 49 : initialized = false;
5582 : 49 : break;
5583 : :
5584 : 6132111 : default:
5585 : : /* Don't allow initializations for incomplete types except for
5586 : : arrays which might be completed by the initialization. */
5587 : :
5588 : : /* This can happen if the array size is an undefined macro.
5589 : : We already gave a warning, so we don't need another one. */
5590 : 6132111 : if (TREE_TYPE (decl) == error_mark_node)
5591 : : initialized = false;
5592 : 6132089 : else if (COMPLETE_TYPE_P (TREE_TYPE (decl)))
5593 : : {
5594 : : /* A complete type is ok if size is fixed. If the size is
5595 : : variable, an empty initializer is OK and nonempty
5596 : : initializers will be diagnosed in the parser. */
5597 : : }
5598 : 11882 : else if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE)
5599 : : {
5600 : 3 : error ("variable %qD has initializer but incomplete type", decl);
5601 : 3 : initialized = false;
5602 : : }
5603 : : }
5604 : :
5605 : 63 : if (initialized)
5606 : : {
5607 : 6132086 : if (current_scope == file_scope)
5608 : 152754 : TREE_STATIC (decl) = 1;
5609 : :
5610 : : /* Tell 'pushdecl' this is an initialized decl
5611 : : even though we don't yet have the initializer expression.
5612 : : Also tell 'finish_decl' it may store the real initializer. */
5613 : 6132086 : DECL_INITIAL (decl) = error_mark_node;
5614 : : }
5615 : :
5616 : : /* If this is a function declaration, write a record describing it to the
5617 : : prototypes file (if requested). */
5618 : :
5619 : 25141324 : if (TREE_CODE (decl) == FUNCTION_DECL)
5620 : 12429838 : gen_aux_info_record (decl, 0, 0, prototype_p (TREE_TYPE (decl)));
5621 : :
5622 : : /* ANSI specifies that a tentative definition which is not merged with
5623 : : a non-tentative definition behaves exactly like a definition with an
5624 : : initializer equal to zero. (Section 3.7.2)
5625 : :
5626 : : -fno-common gives strict ANSI behavior, though this tends to break
5627 : : a large body of code that grew up without this rule.
5628 : :
5629 : : Thread-local variables are never common, since there's no entrenched
5630 : : body of code to break, and it allows more efficient variable references
5631 : : in the presence of dynamic linking. */
5632 : :
5633 : 25141324 : if (VAR_P (decl)
5634 : 8695527 : && !initialized
5635 : 2563441 : && TREE_PUBLIC (decl)
5636 : 977647 : && !DECL_THREAD_LOCAL_P (decl)
5637 : 26116667 : && !flag_no_common)
5638 : 126 : DECL_COMMON (decl) = 1;
5639 : :
5640 : : /* Set attributes here so if duplicate decl, will have proper attributes. */
5641 : 25141324 : c_decl_attributes (&decl, attributes, 0);
5642 : :
5643 : : /* Handle gnu_inline attribute. */
5644 : 25141324 : if (declspecs->inline_p
5645 : 1009 : && !flag_gnu89_inline
5646 : 977 : && TREE_CODE (decl) == FUNCTION_DECL
5647 : 25142293 : && (lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (decl))
5648 : 946 : || current_function_decl))
5649 : : {
5650 : 46 : if (declspecs->storage_class == csc_auto && current_scope != file_scope)
5651 : : ;
5652 : 37 : else if (declspecs->storage_class != csc_static)
5653 : 37 : DECL_EXTERNAL (decl) = !DECL_EXTERNAL (decl);
5654 : : }
5655 : :
5656 : 25141324 : if (TREE_CODE (decl) == FUNCTION_DECL
5657 : 25141324 : && targetm.calls.promote_prototypes (TREE_TYPE (decl)))
5658 : : {
5659 : 12429838 : struct c_declarator *ce = declarator;
5660 : :
5661 : 12429838 : if (ce->kind == cdk_pointer)
5662 : 898096 : ce = declarator->declarator;
5663 : 12429838 : if (ce->kind == cdk_function)
5664 : : {
5665 : 11893234 : tree args = ce->u.arg_info->parms;
5666 : 31286805 : for (; args; args = DECL_CHAIN (args))
5667 : : {
5668 : 19393571 : tree type = TREE_TYPE (args);
5669 : 19393571 : if (type && INTEGRAL_TYPE_P (type)
5670 : 23335328 : && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
5671 : 28432 : DECL_ARG_TYPE (args) = c_type_promotes_to (type);
5672 : : }
5673 : : }
5674 : : }
5675 : :
5676 : 25141324 : if (TREE_CODE (decl) == FUNCTION_DECL
5677 : 12429838 : && DECL_DECLARED_INLINE_P (decl)
5678 : 999 : && DECL_UNINLINABLE (decl)
5679 : 25141326 : && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
5680 : 2 : warning (OPT_Wattributes, "inline function %q+D given attribute %qs",
5681 : : decl, "noinline");
5682 : :
5683 : : /* C99 6.7.4p3: An inline definition of a function with external
5684 : : linkage shall not contain a definition of a modifiable object
5685 : : with static storage duration... */
5686 : 25141324 : if (VAR_P (decl)
5687 : 8695527 : && current_scope != file_scope
5688 : 7558414 : && TREE_STATIC (decl)
5689 : 78067 : && !TREE_READONLY (decl)
5690 : 75725 : && DECL_DECLARED_INLINE_P (current_function_decl)
5691 : 25141387 : && DECL_EXTERNAL (current_function_decl))
5692 : 7 : record_inline_static (input_location, current_function_decl,
5693 : : decl, csi_modifiable);
5694 : :
5695 : 25141324 : if (c_dialect_objc ()
5696 : 0 : && VAR_OR_FUNCTION_DECL_P (decl))
5697 : 0 : objc_check_global_decl (decl);
5698 : :
5699 : : /* Add this decl to the current scope.
5700 : : TEM may equal DECL or it may be a previous decl of the same name. */
5701 : 25141324 : if (do_push)
5702 : : {
5703 : 25141013 : tem = pushdecl (decl);
5704 : :
5705 : 25141013 : if (initialized && DECL_EXTERNAL (tem))
5706 : : {
5707 : 23 : DECL_EXTERNAL (tem) = 0;
5708 : 23 : TREE_STATIC (tem) = 1;
5709 : : }
5710 : :
5711 : 25141013 : return tem;
5712 : : }
5713 : : else
5714 : 311 : return decl;
5715 : : }
5716 : :
5717 : : /* Subroutine of finish_decl. TYPE is the type of an uninitialized object
5718 : : DECL or the non-array element type if DECL is an uninitialized array.
5719 : : If that type has a const member, diagnose this. */
5720 : :
5721 : : static void
5722 : 7 : diagnose_uninitialized_cst_member (tree decl, tree type)
5723 : : {
5724 : 7 : tree field;
5725 : 17 : for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field))
5726 : : {
5727 : 10 : tree field_type;
5728 : 10 : if (TREE_CODE (field) != FIELD_DECL)
5729 : 0 : continue;
5730 : 10 : field_type = strip_array_types (TREE_TYPE (field));
5731 : :
5732 : 10 : if (TYPE_QUALS (field_type) & TYPE_QUAL_CONST)
5733 : : {
5734 : 5 : auto_diagnostic_group d;
5735 : 5 : if (warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat,
5736 : : "uninitialized const member in %qT is invalid in C++",
5737 : 5 : strip_array_types (TREE_TYPE (decl))))
5738 : 5 : inform (DECL_SOURCE_LOCATION (field), "%qD should be initialized", field);
5739 : 5 : }
5740 : :
5741 : 10 : if (RECORD_OR_UNION_TYPE_P (field_type))
5742 : 2 : diagnose_uninitialized_cst_member (decl, field_type);
5743 : : }
5744 : 7 : }
5745 : :
5746 : : /* Finish processing of a declaration;
5747 : : install its initial value.
5748 : : If ORIGTYPE is not NULL_TREE, it is the original type of INIT.
5749 : : If the length of an array type is not known before,
5750 : : it must be determined now, from the initial value, or it is an error.
5751 : :
5752 : : INIT_LOC is the location of the initial value. */
5753 : :
5754 : : void
5755 : 137480315 : finish_decl (tree decl, location_t init_loc, tree init,
5756 : : tree origtype, tree asmspec_tree)
5757 : : {
5758 : 137480315 : tree type;
5759 : 137480315 : bool was_incomplete = (DECL_SIZE (decl) == NULL_TREE);
5760 : 137480315 : const char *asmspec = 0;
5761 : :
5762 : : /* If a name was specified, get the string. */
5763 : 128782215 : if (VAR_OR_FUNCTION_DECL_P (decl)
5764 : 149910153 : && DECL_FILE_SCOPE_P (decl))
5765 : 13568463 : asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5766 : 137480315 : if (asmspec_tree)
5767 : 687979 : asmspec = TREE_STRING_POINTER (asmspec_tree);
5768 : :
5769 : 137480315 : if (VAR_P (decl)
5770 : 137480315 : && TREE_STATIC (decl)
5771 : 137480315 : && global_bindings_p ())
5772 : : /* So decl is a global variable. Record the types it uses
5773 : : so that we can decide later to emit debug info for them. */
5774 : 970814 : record_types_used_by_current_var_decl (decl);
5775 : :
5776 : : /* If `start_decl' didn't like having an initialization, ignore it now. */
5777 : 137480315 : if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
5778 : : init = NULL_TREE;
5779 : :
5780 : : /* Don't crash if parm is initialized. */
5781 : 137480315 : if (TREE_CODE (decl) == PARM_DECL)
5782 : : init = NULL_TREE;
5783 : :
5784 : 28971427 : if (init)
5785 : 6134660 : store_init_value (init_loc, decl, init, origtype);
5786 : :
5787 : 137480315 : if (c_dialect_objc () && (VAR_OR_FUNCTION_DECL_P (decl)
5788 : 0 : || TREE_CODE (decl) == FIELD_DECL))
5789 : 0 : objc_check_decl (decl);
5790 : :
5791 : 137480315 : type = TREE_TYPE (decl);
5792 : :
5793 : : /* Deduce size of array from initialization, if not already known.
5794 : : This is only needed for an initialization in the current scope;
5795 : : it must not be done for a file-scope initialization of a
5796 : : declaration with external linkage, redeclared in an inner scope
5797 : : with the outer declaration shadowed in an intermediate scope. */
5798 : 137480315 : if (TREE_CODE (type) == ARRAY_TYPE
5799 : 791526 : && TYPE_DOMAIN (type) == NULL_TREE
5800 : 19424 : && TREE_CODE (decl) != TYPE_DECL
5801 : 137499644 : && !(TREE_PUBLIC (decl) && current_scope != file_scope))
5802 : : {
5803 : 19143 : bool do_default
5804 : 19143 : = (TREE_STATIC (decl)
5805 : : /* Even if pedantic, an external linkage array
5806 : : may have incomplete type at first. */
5807 : 19143 : ? pedantic && !TREE_PUBLIC (decl)
5808 : 12247 : : !DECL_EXTERNAL (decl));
5809 : 19143 : int failure
5810 : 19143 : = complete_array_type (&TREE_TYPE (decl), DECL_INITIAL (decl),
5811 : : do_default);
5812 : :
5813 : : /* Get the completed type made by complete_array_type. */
5814 : 19143 : type = TREE_TYPE (decl);
5815 : :
5816 : 19143 : switch (failure)
5817 : : {
5818 : 0 : case 1:
5819 : 0 : error ("initializer fails to determine size of %q+D", decl);
5820 : 0 : break;
5821 : :
5822 : 7289 : case 2:
5823 : 7289 : if (do_default)
5824 : 1 : error ("array size missing in %q+D", decl);
5825 : : break;
5826 : :
5827 : 3 : case 3:
5828 : 3 : error ("zero or negative size array %q+D", decl);
5829 : 3 : break;
5830 : :
5831 : 11851 : case 0:
5832 : : /* For global variables, update the copy of the type that
5833 : : exists in the binding. */
5834 : 11851 : if (TREE_PUBLIC (decl))
5835 : : {
5836 : 3590 : struct c_binding *b_ext = I_SYMBOL_BINDING (DECL_NAME (decl));
5837 : 7180 : while (b_ext && !B_IN_EXTERNAL_SCOPE (b_ext))
5838 : 3590 : b_ext = b_ext->shadowed;
5839 : 3590 : if (b_ext && TREE_CODE (decl) == TREE_CODE (b_ext->decl))
5840 : : {
5841 : 3590 : if (b_ext->u.type && comptypes (b_ext->u.type, type))
5842 : 176 : b_ext->u.type = composite_type (b_ext->u.type, type);
5843 : : else
5844 : 3414 : b_ext->u.type = type;
5845 : : }
5846 : : }
5847 : : break;
5848 : :
5849 : 0 : default:
5850 : 0 : gcc_unreachable ();
5851 : : }
5852 : :
5853 : 19143 : if (DECL_INITIAL (decl) && DECL_INITIAL (decl) != error_mark_node)
5854 : 11014 : TREE_TYPE (DECL_INITIAL (decl)) = type;
5855 : :
5856 : 19143 : relayout_decl (decl);
5857 : : }
5858 : :
5859 : : /* Look for braced array initializers for character arrays and
5860 : : recursively convert them into STRING_CSTs. */
5861 : 137480315 : if (tree init = DECL_INITIAL (decl))
5862 : 114649992 : DECL_INITIAL (decl) = braced_lists_to_strings (type, init);
5863 : :
5864 : 137480315 : if (VAR_P (decl))
5865 : : {
5866 : 8698100 : if (init && TREE_CODE (init) == CONSTRUCTOR)
5867 : 101629 : add_flexible_array_elts_to_size (decl, init);
5868 : :
5869 : 8698100 : complete_flexible_array_elts (DECL_INITIAL (decl));
5870 : :
5871 : 8698100 : if (is_global_var (decl))
5872 : : {
5873 : 1219265 : type_context_kind context = (DECL_THREAD_LOCAL_P (decl)
5874 : 1219265 : ? TCTX_THREAD_STORAGE
5875 : 1219265 : : TCTX_STATIC_STORAGE);
5876 : 1219265 : if (!verify_type_context (input_location, context, TREE_TYPE (decl)))
5877 : 0 : TREE_TYPE (decl) = error_mark_node;
5878 : : }
5879 : :
5880 : 8706056 : if (DECL_SIZE (decl) == NULL_TREE && TREE_TYPE (decl) != error_mark_node
5881 : 8705957 : && COMPLETE_TYPE_P (TREE_TYPE (decl)))
5882 : 97 : layout_decl (decl, 0);
5883 : :
5884 : 8698100 : if (DECL_SIZE (decl) == NULL_TREE
5885 : : /* Don't give an error if we already gave one earlier. */
5886 : 7859 : && TREE_TYPE (decl) != error_mark_node
5887 : 8705860 : && (TREE_STATIC (decl)
5888 : : /* A static variable with an incomplete type
5889 : : is an error if it is initialized.
5890 : : Also if it is not file scope.
5891 : : Also if it is thread-local (in C23).
5892 : : Otherwise, let it through, but if it is not `extern'
5893 : : then it may cause an error message later. */
5894 : 243 : ? (DECL_INITIAL (decl) != NULL_TREE
5895 : 243 : || !DECL_FILE_SCOPE_P (decl)
5896 : 243 : || (flag_isoc23 && DECL_THREAD_LOCAL_P (decl)))
5897 : : /* An automatic variable with an incomplete type
5898 : : is an error. */
5899 : 7517 : : !DECL_EXTERNAL (decl)))
5900 : : {
5901 : 13 : error ("storage size of %q+D isn%'t known", decl);
5902 : 13 : TREE_TYPE (decl) = error_mark_node;
5903 : : }
5904 : :
5905 : 17210080 : if ((RECORD_OR_UNION_TYPE_P (TREE_TYPE (decl))
5906 : 8432856 : || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
5907 : 278185 : && DECL_SIZE (decl) == NULL_TREE
5908 : 8698337 : && TREE_STATIC (decl))
5909 : 94 : incomplete_record_decls.safe_push (decl);
5910 : :
5911 : 8698100 : if (is_global_var (decl)
5912 : 1219265 : && DECL_SIZE (decl) != NULL_TREE
5913 : 9909545 : && TREE_TYPE (decl) != error_mark_node)
5914 : : {
5915 : 1211428 : if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
5916 : 1211425 : constant_expression_warning (DECL_SIZE (decl));
5917 : : else
5918 : : {
5919 : 3 : error ("storage size of %q+D isn%'t constant", decl);
5920 : 3 : TREE_TYPE (decl) = error_mark_node;
5921 : : }
5922 : : }
5923 : :
5924 : 8698100 : if (TREE_USED (type))
5925 : : {
5926 : 4 : TREE_USED (decl) = 1;
5927 : 4 : DECL_READ_P (decl) = 1;
5928 : : }
5929 : : }
5930 : :
5931 : : /* If this is a function and an assembler name is specified, reset DECL_RTL
5932 : : so we can give it its new name. Also, update builtin_decl if it
5933 : : was a normal built-in. */
5934 : 137480315 : if (TREE_CODE (decl) == FUNCTION_DECL && asmspec)
5935 : : {
5936 : 676557 : if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5937 : 68230 : set_builtin_user_assembler_name (decl, asmspec);
5938 : 676557 : set_user_assembler_name (decl, asmspec);
5939 : : }
5940 : :
5941 : : /* If #pragma weak was used, mark the decl weak now. */
5942 : 137480315 : maybe_apply_pragma_weak (decl);
5943 : :
5944 : : /* Output the assembler code and/or RTL code for variables and functions,
5945 : : unless the type is an undefined structure or union.
5946 : : If not, it will get done when the type is completed. */
5947 : :
5948 : 137480315 : if (VAR_OR_FUNCTION_DECL_P (decl))
5949 : : {
5950 : : /* Determine the ELF visibility. */
5951 : 21127938 : if (TREE_PUBLIC (decl))
5952 : 13540040 : c_determine_visibility (decl);
5953 : :
5954 : : /* This is a no-op in c-lang.cc or something real in objc-act.cc. */
5955 : 21127938 : if (c_dialect_objc ())
5956 : 0 : objc_check_decl (decl);
5957 : :
5958 : 21127938 : if (asmspec)
5959 : : {
5960 : : /* If this is not a static variable, issue a warning.
5961 : : It doesn't make any sense to give an ASMSPEC for an
5962 : : ordinary, non-register local variable. Historically,
5963 : : GCC has accepted -- but ignored -- the ASMSPEC in
5964 : : this case. */
5965 : 688996 : if (!DECL_FILE_SCOPE_P (decl)
5966 : 1017 : && VAR_P (decl)
5967 : 1017 : && !C_DECL_REGISTER (decl)
5968 : 687987 : && !TREE_STATIC (decl))
5969 : 1 : warning (0, "ignoring %<asm%> specifier for non-static local "
5970 : : "variable %q+D", decl);
5971 : : else
5972 : 687978 : set_user_assembler_name (decl, asmspec);
5973 : : }
5974 : :
5975 : 21127938 : if (DECL_FILE_SCOPE_P (decl))
5976 : : {
5977 : 13568463 : if (DECL_INITIAL (decl) == NULL_TREE
5978 : 13568463 : || DECL_INITIAL (decl) == error_mark_node)
5979 : : /* Don't output anything
5980 : : when a tentative file-scope definition is seen.
5981 : : But at end of compilation, do output code for them. */
5982 : 13415728 : DECL_DEFER_OUTPUT (decl) = 1;
5983 : 13568463 : if (asmspec && VAR_P (decl) && C_DECL_REGISTER (decl))
5984 : 68 : DECL_HARD_REGISTER (decl) = 1;
5985 : 13568463 : rest_of_decl_compilation (decl, true, 0);
5986 : :
5987 : 13568463 : if (TREE_CODE (decl) == FUNCTION_DECL)
5988 : : {
5989 : 12429775 : tree parms = DECL_ARGUMENTS (decl);
5990 : 12429775 : const bool builtin = fndecl_built_in_p (decl);
5991 : 12429775 : if (tree access = build_attr_access_from_parms (parms, !builtin))
5992 : 327548 : decl_attributes (&decl, access, 0);
5993 : : }
5994 : : }
5995 : : else
5996 : : {
5997 : : /* In conjunction with an ASMSPEC, the `register'
5998 : : keyword indicates that we should place the variable
5999 : : in a particular register. */
6000 : 7559475 : if (asmspec && C_DECL_REGISTER (decl))
6001 : : {
6002 : 1009 : DECL_HARD_REGISTER (decl) = 1;
6003 : : /* This cannot be done for a structure with volatile
6004 : : fields, on which DECL_REGISTER will have been
6005 : : reset. */
6006 : 1009 : if (!DECL_REGISTER (decl))
6007 : 1 : error ("cannot put object with volatile field into register");
6008 : : }
6009 : :
6010 : 7559475 : if (TREE_CODE (decl) != FUNCTION_DECL)
6011 : : {
6012 : : /* If we're building a variable sized type, and we might be
6013 : : reachable other than via the top of the current binding
6014 : : level, then create a new BIND_EXPR so that we deallocate
6015 : : the object at the right time. */
6016 : : /* Note that DECL_SIZE can be null due to errors. */
6017 : 7559412 : if (DECL_SIZE (decl)
6018 : 7559373 : && !TREE_CONSTANT (DECL_SIZE (decl))
6019 : 7566701 : && STATEMENT_LIST_HAS_LABEL (cur_stmt_list))
6020 : : {
6021 : 1336 : tree bind;
6022 : 1336 : bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, NULL);
6023 : 1336 : TREE_SIDE_EFFECTS (bind) = 1;
6024 : 1336 : add_stmt (bind);
6025 : 1336 : BIND_EXPR_BODY (bind) = push_stmt_list ();
6026 : : }
6027 : 7559412 : add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl),
6028 : : DECL_EXPR, decl));
6029 : : }
6030 : : }
6031 : :
6032 : :
6033 : 21127938 : if (!DECL_FILE_SCOPE_P (decl))
6034 : : {
6035 : : /* Recompute the RTL of a local array now
6036 : : if it used to be an incomplete type. */
6037 : 7559475 : if (was_incomplete && !is_global_var (decl))
6038 : : {
6039 : : /* If we used it already as memory, it must stay in memory. */
6040 : 5184 : TREE_ADDRESSABLE (decl) = TREE_USED (decl);
6041 : : /* If it's still incomplete now, no init will save it. */
6042 : 5184 : if (DECL_SIZE (decl) == NULL_TREE)
6043 : 102 : DECL_INITIAL (decl) = NULL_TREE;
6044 : : }
6045 : : }
6046 : : }
6047 : :
6048 : 137480315 : if (TREE_CODE (decl) == TYPE_DECL)
6049 : : {
6050 : 4090584 : if (!DECL_FILE_SCOPE_P (decl)
6051 : 4090584 : && c_type_variably_modified_p (TREE_TYPE (decl)))
6052 : 5309 : add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl));
6053 : :
6054 : 7889166 : rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl), 0);
6055 : : }
6056 : :
6057 : : /* Install a cleanup (aka destructor) if one was given. */
6058 : 137480315 : if (VAR_P (decl) && !TREE_STATIC (decl))
6059 : : {
6060 : 7646430 : tree attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
6061 : 7646430 : if (attr)
6062 : : {
6063 : 95 : tree cleanup_id = TREE_VALUE (TREE_VALUE (attr));
6064 : 95 : tree cleanup_decl = lookup_name (cleanup_id);
6065 : 95 : tree cleanup;
6066 : 95 : vec<tree, va_gc> *v;
6067 : :
6068 : : /* Build "cleanup(&decl)" for the destructor. */
6069 : 95 : cleanup = build_unary_op (input_location, ADDR_EXPR, decl, false);
6070 : 95 : vec_alloc (v, 1);
6071 : 95 : v->quick_push (cleanup);
6072 : 95 : cleanup = c_build_function_call_vec (DECL_SOURCE_LOCATION (decl),
6073 : : vNULL, cleanup_decl, v, NULL);
6074 : 95 : vec_free (v);
6075 : :
6076 : : /* Don't warn about decl unused; the cleanup uses it. */
6077 : 95 : TREE_USED (decl) = 1;
6078 : 95 : TREE_USED (cleanup_decl) = 1;
6079 : 95 : DECL_READ_P (decl) = 1;
6080 : :
6081 : 95 : push_cleanup (decl, cleanup, false);
6082 : : }
6083 : : }
6084 : :
6085 : 137480315 : if (warn_cxx_compat
6086 : 19203 : && VAR_P (decl)
6087 : 6729 : && !DECL_EXTERNAL (decl)
6088 : 137486696 : && DECL_INITIAL (decl) == NULL_TREE)
6089 : : {
6090 : 2058 : type = strip_array_types (type);
6091 : 2058 : if (TREE_READONLY (decl))
6092 : 6 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat,
6093 : : "uninitialized %<const %D%> is invalid in C++", decl);
6094 : 2052 : else if (RECORD_OR_UNION_TYPE_P (type)
6095 : 2052 : && C_TYPE_FIELDS_READONLY (type))
6096 : 5 : diagnose_uninitialized_cst_member (decl, type);
6097 : : }
6098 : :
6099 : 137480315 : if (flag_openmp
6100 : 321083 : && VAR_P (decl)
6101 : 137501390 : && lookup_attribute ("omp declare target implicit",
6102 : 21075 : DECL_ATTRIBUTES (decl)))
6103 : : {
6104 : 13 : DECL_ATTRIBUTES (decl)
6105 : 13 : = remove_attribute ("omp declare target implicit",
6106 : 13 : DECL_ATTRIBUTES (decl));
6107 : 13 : if (!omp_mappable_type (TREE_TYPE (decl)))
6108 : 9 : error ("%q+D in declare target directive does not have mappable type",
6109 : : decl);
6110 : 4 : else if (!lookup_attribute ("omp declare target",
6111 : 4 : DECL_ATTRIBUTES (decl))
6112 : 8 : && !lookup_attribute ("omp declare target link",
6113 : 4 : DECL_ATTRIBUTES (decl)))
6114 : : {
6115 : 4 : DECL_ATTRIBUTES (decl)
6116 : 4 : = tree_cons (get_identifier ("omp declare target"),
6117 : 4 : NULL_TREE, DECL_ATTRIBUTES (decl));
6118 : 4 : symtab_node *node = symtab_node::get (decl);
6119 : 4 : if (node != NULL)
6120 : : {
6121 : 4 : node->offloadable = 1;
6122 : 4 : if (ENABLE_OFFLOADING)
6123 : : {
6124 : : g->have_offload = true;
6125 : : if (is_a <varpool_node *> (node))
6126 : : vec_safe_push (offload_vars, decl);
6127 : : }
6128 : : }
6129 : : }
6130 : : }
6131 : :
6132 : : /* This is the last point we can lower alignment so give the target the
6133 : : chance to do so. */
6134 : 137480315 : if (VAR_P (decl)
6135 : 8698100 : && !is_global_var (decl)
6136 : 144959150 : && !DECL_HARD_REGISTER (decl))
6137 : 7477826 : targetm.lower_local_decl_alignment (decl);
6138 : :
6139 : 137480315 : invoke_plugin_callbacks (PLUGIN_FINISH_DECL, decl);
6140 : 137480315 : }
6141 : :
6142 : : /* Given a parsed parameter declaration, decode it into a PARM_DECL.
6143 : : EXPR is NULL or a pointer to an expression that needs to be
6144 : : evaluated for the side effects of array size expressions in the
6145 : : parameters. */
6146 : :
6147 : : tree
6148 : 0 : grokparm (const struct c_parm *parm, tree *expr)
6149 : : {
6150 : 0 : tree attrs = parm->attrs;
6151 : 0 : tree decl = grokdeclarator (parm->declarator, parm->specs, PARM, false,
6152 : 0 : NULL, &attrs, expr, NULL, DEPRECATED_NORMAL);
6153 : :
6154 : 0 : decl_attributes (&decl, attrs, 0);
6155 : :
6156 : 0 : return decl;
6157 : : }
6158 : :
6159 : : /* Return attribute "arg spec" corresponding to an array/VLA parameter
6160 : : described by PARM, concatenated onto attributes ATTRS.
6161 : : The spec consists of one dollar symbol for each specified variable
6162 : : bound, one asterisk for each unspecified variable bound, followed
6163 : : by at most one specification of the most significant bound of
6164 : : an ordinary array parameter. For ordinary arrays the specification
6165 : : is either the constant bound itself, or the space character for
6166 : : an array with an unspecified bound (the [] form). Finally, a chain
6167 : : of specified variable bounds is appended to the spec, starting with
6168 : : the most significant bound. For example, the PARM T a[2][m][3][n]
6169 : : will produce __attribute__((arg spec ("[$$2]", m, n)).
6170 : : For T a typedef for an array with variable bounds, the bounds are
6171 : : included in the specification in the expected order.
6172 : : No "arg spec" is created for parameters of pointer types, making
6173 : : a distinction between T(*)[N] (or, equivalently, T[][N]) and
6174 : : the T[M][N] form, all of which have the same type and are represented
6175 : : the same, but only the last of which gets an "arg spec" describing
6176 : : the most significant bound M. */
6177 : :
6178 : : static tree
6179 : 108486179 : get_parm_array_spec (const struct c_parm *parm, tree attrs)
6180 : : {
6181 : : /* The attribute specification string, minor bound first. */
6182 : 108486179 : std::string spec;
6183 : :
6184 : : /* A list of VLA variable bounds, major first, or null if unspecified
6185 : : or not a VLA. */
6186 : 108486179 : tree vbchain = NULL_TREE;
6187 : : /* True for a pointer parameter. */
6188 : 108486179 : bool pointer = false;
6189 : : /* True for an ordinary array with an unpecified bound. */
6190 : 108486179 : bool nobound = false;
6191 : :
6192 : : /* Create a string representation for the bounds of the array/VLA. */
6193 : 206542039 : for (c_declarator *pd = parm->declarator, *next; pd; pd = next)
6194 : : {
6195 : 109140776 : next = pd->declarator;
6196 : 109140804 : while (next && next->kind == cdk_attrs)
6197 : 28 : next = next->declarator;
6198 : :
6199 : : /* Remember if a pointer has been seen to avoid storing the constant
6200 : : bound. */
6201 : 109140776 : if (pd->kind == cdk_pointer)
6202 : 11361318 : pointer = true;
6203 : :
6204 : 109140776 : if ((pd->kind == cdk_pointer || pd->kind == cdk_function)
6205 : 11435685 : && (!next || next->kind == cdk_id))
6206 : : {
6207 : : /* Do nothing for the common case of a pointer. The fact that
6208 : : the parameter is one can be deduced from the absence of
6209 : : an arg spec for it. */
6210 : : return attrs;
6211 : : }
6212 : :
6213 : 98284524 : if (pd->kind == cdk_id)
6214 : : {
6215 : 194677868 : if (pointer
6216 : 97383263 : || !parm->specs->type
6217 : 97383263 : || TREE_CODE (parm->specs->type) != ARRAY_TYPE
6218 : 124677 : || !TYPE_DOMAIN (parm->specs->type)
6219 : 97525923 : || !TYPE_MAX_VALUE (TYPE_DOMAIN (parm->specs->type)))
6220 : 97276605 : continue;
6221 : :
6222 : 124658 : tree max = TYPE_MAX_VALUE (TYPE_DOMAIN (parm->specs->type));
6223 : 124658 : if (!vbchain
6224 : 124644 : && TREE_CODE (max) == INTEGER_CST)
6225 : : {
6226 : : /* Extract the upper bound from a parameter of an array type
6227 : : unless the parameter is an ordinary array of unspecified
6228 : : bound in which case a next iteration of the loop will
6229 : : exit. */
6230 : 124410 : if (spec.empty () || spec.end ()[-1] != ' ')
6231 : : {
6232 : 124410 : if (!tree_fits_shwi_p (max))
6233 : 0 : continue;
6234 : :
6235 : : /* The upper bound is the value of the largest valid
6236 : : index. */
6237 : 124410 : HOST_WIDE_INT n = tree_to_shwi (max) + 1;
6238 : 124410 : char buf[40];
6239 : 124410 : sprintf (buf, HOST_WIDE_INT_PRINT_UNSIGNED, n);
6240 : 124410 : spec += buf;
6241 : : }
6242 : 124410 : continue;
6243 : 124410 : }
6244 : :
6245 : : /* For a VLA typedef, create a list of its variable bounds and
6246 : : append it in the expected order to VBCHAIN. */
6247 : : tree tpbnds = NULL_TREE;
6248 : 1188 : for (tree type = parm->specs->type; TREE_CODE (type) == ARRAY_TYPE;
6249 : 940 : type = TREE_TYPE (type))
6250 : : {
6251 : 940 : tree nelts = array_type_nelts (type);
6252 : 940 : if (error_operand_p (nelts))
6253 : : return attrs;
6254 : 940 : if (TREE_CODE (nelts) != INTEGER_CST)
6255 : : {
6256 : : /* Each variable VLA bound is represented by the dollar
6257 : : sign. */
6258 : 908 : spec += "$";
6259 : 908 : tpbnds = tree_cons (NULL_TREE, nelts, tpbnds);
6260 : : }
6261 : : }
6262 : 248 : tpbnds = nreverse (tpbnds);
6263 : 248 : vbchain = chainon (vbchain, tpbnds);
6264 : 248 : continue;
6265 : 248 : }
6266 : :
6267 : 883261 : if (pd->kind != cdk_array)
6268 : 579433 : continue;
6269 : :
6270 : 303828 : if (pd->u.array.vla_unspec_p)
6271 : : {
6272 : : /* Each unspecified bound is represented by a star. There
6273 : : can be any number of these in a declaration (but none in
6274 : : a definition). */
6275 : 124 : spec += '*';
6276 : 124 : continue;
6277 : : }
6278 : :
6279 : 303704 : tree nelts = pd->u.array.dimen;
6280 : 303704 : if (!nelts)
6281 : : {
6282 : : /* Ordinary array of unspecified size. There can be at most
6283 : : one for the most significant bound. Exit on the next
6284 : : iteration which determines whether or not PARM is declared
6285 : : as a pointer or an array. */
6286 : 62454 : nobound = true;
6287 : 62454 : continue;
6288 : : }
6289 : :
6290 : 241250 : if (pd->u.array.static_p)
6291 : 113 : spec += 's';
6292 : :
6293 : 241250 : if (!INTEGRAL_TYPE_P (TREE_TYPE (nelts)))
6294 : : /* Avoid invalid NELTS. */
6295 : : return attrs;
6296 : :
6297 : 241207 : STRIP_NOPS (nelts);
6298 : 241207 : nelts = c_fully_fold (nelts, false, nullptr);
6299 : 241207 : if (TREE_CODE (nelts) == INTEGER_CST)
6300 : : {
6301 : : /* Skip all constant bounds except the most significant one.
6302 : : The interior ones are included in the array type. */
6303 : 232522 : if (next && (next->kind == cdk_array || next->kind == cdk_pointer))
6304 : 3901 : continue;
6305 : :
6306 : 228621 : if (!tree_fits_uhwi_p (nelts))
6307 : : /* Bail completely on invalid bounds. */
6308 : 2 : return attrs;
6309 : :
6310 : 228619 : char buf[40];
6311 : 228619 : unsigned HOST_WIDE_INT n = tree_to_uhwi (nelts);
6312 : 228619 : sprintf (buf, HOST_WIDE_INT_PRINT_UNSIGNED, n);
6313 : 228619 : spec += buf;
6314 : 228619 : break;
6315 : : }
6316 : :
6317 : : /* Each variable VLA bound is represented by a dollar sign. */
6318 : 8685 : spec += "$";
6319 : 8685 : vbchain = tree_cons (NULL_TREE, nelts, vbchain);
6320 : : }
6321 : :
6322 : 97629882 : if (spec.empty () && !nobound)
6323 : : return attrs;
6324 : :
6325 : 416407 : spec.insert (0, "[");
6326 : 416407 : if (nobound)
6327 : : /* Ordinary array of unspecified bound is represented by a space.
6328 : : It must be last in the spec. */
6329 : 62399 : spec += ' ';
6330 : 416407 : spec += ']';
6331 : :
6332 : 416407 : tree acsstr = build_string (spec.length () + 1, spec.c_str ());
6333 : 416407 : tree args = tree_cons (NULL_TREE, acsstr, vbchain);
6334 : 416407 : tree name = get_identifier ("arg spec");
6335 : 416407 : return tree_cons (name, args, attrs);
6336 : 108486179 : }
6337 : :
6338 : : /* Given a parsed parameter declaration, decode it into a PARM_DECL
6339 : : and push that on the current scope. EXPR is a pointer to an
6340 : : expression that needs to be evaluated for the side effects of array
6341 : : size expressions in the parameters. */
6342 : :
6343 : : void
6344 : 108486179 : push_parm_decl (const struct c_parm *parm, tree *expr)
6345 : : {
6346 : 108486179 : tree attrs = parm->attrs;
6347 : 108486179 : tree decl = grokdeclarator (parm->declarator, parm->specs, PARM, false, NULL,
6348 : 108486179 : &attrs, expr, NULL, DEPRECATED_NORMAL);
6349 : 108486179 : if (decl && DECL_P (decl))
6350 : 108486179 : DECL_SOURCE_LOCATION (decl) = parm->loc;
6351 : :
6352 : 108486179 : attrs = get_parm_array_spec (parm, attrs);
6353 : 108486179 : decl_attributes (&decl, attrs, 0);
6354 : :
6355 : 108486179 : decl = pushdecl (decl);
6356 : :
6357 : 108486179 : finish_decl (decl, input_location, NULL_TREE, NULL_TREE, NULL_TREE);
6358 : 108486179 : }
6359 : :
6360 : : /* Mark all the parameter declarations to date as forward decls.
6361 : : Also diagnose use of this extension. */
6362 : :
6363 : : void
6364 : 37 : mark_forward_parm_decls (void)
6365 : : {
6366 : 37 : struct c_binding *b;
6367 : :
6368 : 37 : if (pedantic && !current_scope->warned_forward_parm_decls)
6369 : : {
6370 : 4 : pedwarn (input_location, OPT_Wpedantic,
6371 : : "ISO C forbids forward parameter declarations");
6372 : 4 : current_scope->warned_forward_parm_decls = true;
6373 : : }
6374 : :
6375 : 83 : for (b = current_scope->bindings; b; b = b->prev)
6376 : 46 : if (TREE_CODE (b->decl) == PARM_DECL)
6377 : 46 : TREE_ASM_WRITTEN (b->decl) = 1;
6378 : 37 : }
6379 : :
6380 : : /* Build a COMPOUND_LITERAL_EXPR. TYPE is the type given in the compound
6381 : : literal, which may be an incomplete array type completed by the
6382 : : initializer; INIT is a CONSTRUCTOR at LOC that initializes the compound
6383 : : literal. NON_CONST is true if the initializers contain something
6384 : : that cannot occur in a constant expression. If ALIGNAS_ALIGN is nonzero,
6385 : : it is the (valid) alignment for this compound literal, as specified
6386 : : with _Alignas. SCSPECS are the storage class specifiers (C23) from the
6387 : : compound literal. */
6388 : :
6389 : : tree
6390 : 869039 : build_compound_literal (location_t loc, tree type, tree init, bool non_const,
6391 : : unsigned int alignas_align,
6392 : : struct c_declspecs *scspecs)
6393 : : {
6394 : : /* We do not use start_decl here because we have a type, not a declarator;
6395 : : and do not use finish_decl because the decl should be stored inside
6396 : : the COMPOUND_LITERAL_EXPR rather than added elsewhere as a DECL_EXPR. */
6397 : 869039 : tree decl;
6398 : 869039 : tree complit;
6399 : 869039 : tree stmt;
6400 : 869039 : bool threadp = scspecs ? scspecs->thread_p : false;
6401 : 1738078 : enum c_storage_class storage_class = (scspecs
6402 : 869039 : ? scspecs->storage_class
6403 : : : csc_none);
6404 : :
6405 : 869039 : if (type == error_mark_node
6406 : 869023 : || init == error_mark_node)
6407 : : return error_mark_node;
6408 : :
6409 : 868970 : if (current_scope == file_scope && storage_class == csc_register)
6410 : : {
6411 : 1 : error_at (loc, "file-scope compound literal specifies %<register%>");
6412 : 1 : storage_class = csc_none;
6413 : : }
6414 : :
6415 : 868970 : if (current_scope != file_scope && threadp && storage_class == csc_none)
6416 : : {
6417 : 2 : error_at (loc, "compound literal implicitly auto and declared %qs",
6418 : 1 : scspecs->thread_gnu_p ? "__thread" : "_Thread_local");
6419 : 1 : threadp = false;
6420 : : }
6421 : :
6422 : 868970 : decl = build_decl (loc, VAR_DECL, NULL_TREE, type);
6423 : 868970 : DECL_EXTERNAL (decl) = 0;
6424 : 868970 : TREE_PUBLIC (decl) = 0;
6425 : 1737940 : TREE_STATIC (decl) = (current_scope == file_scope
6426 : 868970 : || storage_class == csc_static);
6427 : 868970 : DECL_CONTEXT (decl) = current_function_decl;
6428 : 868970 : TREE_USED (decl) = 1;
6429 : 868970 : DECL_READ_P (decl) = 1;
6430 : 868970 : DECL_ARTIFICIAL (decl) = 1;
6431 : 868970 : DECL_IGNORED_P (decl) = 1;
6432 : 868970 : C_DECL_COMPOUND_LITERAL_P (decl) = 1;
6433 : 1737711 : C_DECL_DECLARED_CONSTEXPR (decl) = scspecs && scspecs->constexpr_p;
6434 : 868970 : TREE_TYPE (decl) = type;
6435 : 868970 : if (threadp)
6436 : 16 : set_decl_tls_model (decl, decl_default_tls_model (decl));
6437 : 868970 : if (storage_class == csc_register)
6438 : : {
6439 : 10 : C_DECL_REGISTER (decl) = 1;
6440 : 10 : DECL_REGISTER (decl) = 1;
6441 : : }
6442 : 868970 : c_apply_type_quals_to_decl (TYPE_QUALS (strip_array_types (type)), decl);
6443 : 868970 : if (alignas_align)
6444 : : {
6445 : 3 : SET_DECL_ALIGN (decl, alignas_align * BITS_PER_UNIT);
6446 : 3 : DECL_USER_ALIGN (decl) = 1;
6447 : : }
6448 : 868970 : store_init_value (loc, decl, init, NULL_TREE);
6449 : 868970 : if (current_scope != file_scope
6450 : 868725 : && TREE_STATIC (decl)
6451 : 26 : && !TREE_READONLY (decl)
6452 : 15 : && DECL_DECLARED_INLINE_P (current_function_decl)
6453 : 868976 : && DECL_EXTERNAL (current_function_decl))
6454 : 4 : record_inline_static (input_location, current_function_decl,
6455 : : decl, csi_modifiable);
6456 : :
6457 : 868970 : if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type))
6458 : : {
6459 : 250 : int failure = complete_array_type (&TREE_TYPE (decl),
6460 : 250 : DECL_INITIAL (decl), true);
6461 : : /* If complete_array_type returns 3, it means that the
6462 : : initial value of the compound literal is empty. Allow it. */
6463 : 250 : gcc_assert (failure == 0 || failure == 3);
6464 : :
6465 : 250 : type = TREE_TYPE (decl);
6466 : 250 : TREE_TYPE (DECL_INITIAL (decl)) = type;
6467 : : }
6468 : :
6469 : 868970 : if (type == error_mark_node || !COMPLETE_TYPE_P (type))
6470 : : {
6471 : 19 : c_incomplete_type_error (loc, NULL_TREE, type);
6472 : 19 : return error_mark_node;
6473 : : }
6474 : :
6475 : 868951 : if (TREE_STATIC (decl)
6476 : 868951 : && !verify_type_context (loc, TCTX_STATIC_STORAGE, type))
6477 : 0 : return error_mark_node;
6478 : :
6479 : 868951 : stmt = build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl);
6480 : 868951 : complit = build1 (COMPOUND_LITERAL_EXPR, type, stmt);
6481 : 868951 : TREE_SIDE_EFFECTS (complit) = 1;
6482 : :
6483 : 868951 : layout_decl (decl, 0);
6484 : :
6485 : 868951 : if (TREE_STATIC (decl))
6486 : : {
6487 : : /* This decl needs a name for the assembler output. */
6488 : 271 : set_compound_literal_name (decl);
6489 : 271 : DECL_DEFER_OUTPUT (decl) = 1;
6490 : 271 : DECL_COMDAT (decl) = 1;
6491 : 271 : pushdecl (decl);
6492 : 271 : rest_of_decl_compilation (decl, 1, 0);
6493 : : }
6494 : 868680 : else if (current_function_decl && !current_scope->parm_flag)
6495 : 868671 : pushdecl (decl);
6496 : :
6497 : 868951 : if (non_const)
6498 : : {
6499 : 174 : complit = build2 (C_MAYBE_CONST_EXPR, type, NULL, complit);
6500 : 174 : C_MAYBE_CONST_EXPR_NON_CONST (complit) = 1;
6501 : : }
6502 : :
6503 : : return complit;
6504 : : }
6505 : :
6506 : : /* Check the type of a compound literal. Here we just check that it
6507 : : is valid for C++. */
6508 : :
6509 : : void
6510 : 869039 : check_compound_literal_type (location_t loc, struct c_type_name *type_name)
6511 : : {
6512 : 869039 : if (warn_cxx_compat
6513 : 159 : && (type_name->specs->typespec_kind == ctsk_tagdef
6514 : 158 : || type_name->specs->typespec_kind == ctsk_tagfirstref
6515 : 157 : || type_name->specs->typespec_kind == ctsk_tagfirstref_attrs))
6516 : 2 : warning_at (loc, OPT_Wc___compat,
6517 : : "defining a type in a compound literal is invalid in C++");
6518 : 869039 : }
6519 : :
6520 : : /* Performs sanity checks on the TYPE and WIDTH of the bit-field NAME,
6521 : : replacing with appropriate values if they are invalid. */
6522 : :
6523 : : static void
6524 : 39375 : check_bitfield_type_and_width (location_t loc, tree *type, tree *width,
6525 : : tree orig_name)
6526 : : {
6527 : 39375 : tree type_mv;
6528 : 39375 : unsigned int max_width;
6529 : 39375 : unsigned HOST_WIDE_INT w;
6530 : 39375 : const char *name = (orig_name
6531 : 69864 : ? identifier_to_locale (IDENTIFIER_POINTER (orig_name))
6532 : 8886 : : _("<anonymous>"));
6533 : :
6534 : : /* Detect and ignore out of range field width and process valid
6535 : : field widths. */
6536 : 39375 : if (!INTEGRAL_TYPE_P (TREE_TYPE (*width)))
6537 : : {
6538 : 4 : error_at (loc, "bit-field %qs width not an integer constant", name);
6539 : 4 : *width = integer_one_node;
6540 : : }
6541 : : else
6542 : : {
6543 : 39371 : if (TREE_CODE (*width) != INTEGER_CST)
6544 : : {
6545 : 12 : *width = c_fully_fold (*width, false, NULL);
6546 : 12 : if (TREE_CODE (*width) == INTEGER_CST)
6547 : 6 : pedwarn (loc, OPT_Wpedantic,
6548 : : "bit-field %qs width not an integer constant expression",
6549 : : name);
6550 : : }
6551 : 39371 : if (TREE_CODE (*width) != INTEGER_CST)
6552 : : {
6553 : 6 : error_at (loc, "bit-field %qs width not an integer constant", name);
6554 : 6 : *width = integer_one_node;
6555 : : }
6556 : 39371 : constant_expression_warning (*width);
6557 : 39371 : if (tree_int_cst_sgn (*width) < 0)
6558 : : {
6559 : 2 : error_at (loc, "negative width in bit-field %qs", name);
6560 : 2 : *width = integer_one_node;
6561 : : }
6562 : 39369 : else if (integer_zerop (*width) && orig_name)
6563 : : {
6564 : 4 : error_at (loc, "zero width for bit-field %qs", name);
6565 : 4 : *width = integer_one_node;
6566 : : }
6567 : : }
6568 : :
6569 : : /* Detect invalid bit-field type. */
6570 : 39375 : if (TREE_CODE (*type) != INTEGER_TYPE
6571 : : && TREE_CODE (*type) != BOOLEAN_TYPE
6572 : : && TREE_CODE (*type) != ENUMERAL_TYPE
6573 : 39375 : && TREE_CODE (*type) != BITINT_TYPE)
6574 : : {
6575 : 6 : error_at (loc, "bit-field %qs has invalid type", name);
6576 : 6 : *type = unsigned_type_node;
6577 : : }
6578 : :
6579 : 39375 : if (TYPE_WARN_IF_NOT_ALIGN (*type))
6580 : : {
6581 : 1 : error_at (loc, "cannot declare bit-field %qs with %<warn_if_not_aligned%> type",
6582 : : name);
6583 : 1 : *type = unsigned_type_node;
6584 : : }
6585 : :
6586 : 39375 : type_mv = TYPE_MAIN_VARIANT (*type);
6587 : 39375 : if (!in_system_header_at (input_location)
6588 : 28989 : && type_mv != integer_type_node
6589 : 26363 : && type_mv != unsigned_type_node
6590 : 51759 : && type_mv != boolean_type_node)
6591 : 11802 : pedwarn_c90 (loc, OPT_Wpedantic,
6592 : : "type of bit-field %qs is a GCC extension", name);
6593 : :
6594 : 39375 : max_width = TYPE_PRECISION (*type);
6595 : :
6596 : 39375 : if (compare_tree_int (*width, max_width) > 0)
6597 : : {
6598 : 4 : error_at (loc, "width of %qs exceeds its type", name);
6599 : 4 : w = max_width;
6600 : 4 : *width = build_int_cst (integer_type_node, w);
6601 : : }
6602 : : else
6603 : 39371 : w = tree_to_uhwi (*width);
6604 : :
6605 : : /* Truncation of hardbool false and true representation values is always safe:
6606 : : either the values remain different, or we'll report a problem when creating
6607 : : the narrower type. */
6608 : 39375 : if (c_hardbool_type_attr (*type))
6609 : 39375 : return;
6610 : :
6611 : 39122 : if (TREE_CODE (*type) == ENUMERAL_TYPE)
6612 : : {
6613 : 4128 : struct lang_type *lt = TYPE_LANG_SPECIFIC (*type);
6614 : 4128 : if (!lt
6615 : 4120 : || w < tree_int_cst_min_precision (lt->enum_min, TYPE_SIGN (*type))
6616 : 8244 : || w < tree_int_cst_min_precision (lt->enum_max, TYPE_SIGN (*type)))
6617 : 13 : warning_at (loc, 0, "%qs is narrower than values of its type", name);
6618 : : }
6619 : : }
6620 : :
6621 : :
6622 : :
6623 : : /* Print warning about variable length array if necessary. */
6624 : :
6625 : : static void
6626 : 22137 : warn_variable_length_array (tree name, tree size)
6627 : : {
6628 : 22137 : if (TREE_CONSTANT (size))
6629 : : {
6630 : 171 : if (name)
6631 : 160 : pedwarn_c90 (input_location, OPT_Wvla,
6632 : : "ISO C90 forbids array %qE whose size "
6633 : : "cannot be evaluated", name);
6634 : : else
6635 : 11 : pedwarn_c90 (input_location, OPT_Wvla, "ISO C90 forbids array "
6636 : : "whose size cannot be evaluated");
6637 : : }
6638 : : else
6639 : : {
6640 : 21966 : if (name)
6641 : 13629 : pedwarn_c90 (input_location, OPT_Wvla,
6642 : : "ISO C90 forbids variable length array %qE", name);
6643 : : else
6644 : 8337 : pedwarn_c90 (input_location, OPT_Wvla, "ISO C90 forbids variable "
6645 : : "length array");
6646 : : }
6647 : 22137 : }
6648 : :
6649 : : /* Returns the smallest location != UNKNOWN_LOCATION in LOCATIONS,
6650 : : considering only those c_declspec_words found in LIST, which
6651 : : must be terminated by cdw_number_of_elements. */
6652 : :
6653 : : static location_t
6654 : 122 : smallest_type_quals_location (const location_t *locations,
6655 : : const c_declspec_word *list)
6656 : : {
6657 : 122 : location_t loc = UNKNOWN_LOCATION;
6658 : 732 : while (*list != cdw_number_of_elements)
6659 : : {
6660 : 610 : location_t newloc = locations[*list];
6661 : 610 : if (loc == UNKNOWN_LOCATION
6662 : 284 : || (newloc != UNKNOWN_LOCATION && newloc < loc))
6663 : 326 : loc = newloc;
6664 : 610 : list++;
6665 : : }
6666 : :
6667 : 122 : return loc;
6668 : : }
6669 : :
6670 : :
6671 : : /* We attach an artificial TYPE_DECL to pointed-to type
6672 : : and arrange for it to be included in a DECL_EXPR. This
6673 : : forces the sizes evaluation at a safe point and ensures it
6674 : : is not deferred until e.g. within a deeper conditional context.
6675 : :
6676 : : PARM contexts have no enclosing statement list that
6677 : : can hold the DECL_EXPR, so we need to use a BIND_EXPR
6678 : : instead, and add it to the list of expressions that
6679 : : need to be evaluated.
6680 : :
6681 : : TYPENAME contexts do have an enclosing statement list,
6682 : : but it would be incorrect to use it, as the size should
6683 : : only be evaluated if the containing expression is
6684 : : evaluated. We might also be in the middle of an
6685 : : expression with side effects on the pointed-to type size
6686 : : "arguments" prior to the pointer declaration point and
6687 : : the fake TYPE_DECL in the enclosing context would force
6688 : : the size evaluation prior to the side effects. We therefore
6689 : : use BIND_EXPRs in TYPENAME contexts too. */
6690 : : static void
6691 : 6794 : add_decl_expr (location_t loc, tree type, tree *expr, bool set_name_p)
6692 : : {
6693 : 6794 : tree bind = NULL_TREE;
6694 : 6794 : if (expr)
6695 : : {
6696 : 1369 : bind = build3 (BIND_EXPR, void_type_node, NULL_TREE, NULL_TREE,
6697 : : NULL_TREE);
6698 : 1369 : TREE_SIDE_EFFECTS (bind) = 1;
6699 : 1369 : BIND_EXPR_BODY (bind) = push_stmt_list ();
6700 : 1369 : push_scope ();
6701 : : }
6702 : :
6703 : 6794 : tree decl = build_decl (loc, TYPE_DECL, NULL_TREE, type);
6704 : 6794 : pushdecl (decl);
6705 : 6794 : DECL_ARTIFICIAL (decl) = 1;
6706 : 6794 : add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl));
6707 : 6794 : if (set_name_p)
6708 : 6196 : TYPE_NAME (type) = decl;
6709 : :
6710 : 6794 : if (bind)
6711 : : {
6712 : 1369 : pop_scope ();
6713 : 1369 : BIND_EXPR_BODY (bind) = pop_stmt_list (BIND_EXPR_BODY (bind));
6714 : 1369 : if (*expr)
6715 : 1317 : *expr = build2 (COMPOUND_EXPR, void_type_node, *expr, bind);
6716 : : else
6717 : 52 : *expr = bind;
6718 : : }
6719 : 6794 : }
6720 : :
6721 : : /* Given declspecs and a declarator,
6722 : : determine the name and type of the object declared
6723 : : and construct a ..._DECL node for it.
6724 : : (In one case we can return a ..._TYPE node instead.
6725 : : For invalid input we sometimes return NULL_TREE.)
6726 : :
6727 : : DECLSPECS is a c_declspecs structure for the declaration specifiers.
6728 : :
6729 : : DECL_CONTEXT says which syntactic context this declaration is in:
6730 : : NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6731 : : FUNCDEF for a function definition. Like NORMAL but a few different
6732 : : error messages in each case. Return value may be zero meaning
6733 : : this definition is too screwy to try to parse.
6734 : : PARM for a parameter declaration (either within a function prototype
6735 : : or before a function body). Make a PARM_DECL, or return void_type_node.
6736 : : TYPENAME if for a typename (in a cast or sizeof).
6737 : : Don't make a DECL node; just return the ..._TYPE node.
6738 : : FIELD for a struct or union field; make a FIELD_DECL.
6739 : : INITIALIZED is true if the decl has an initializer.
6740 : : WIDTH is non-NULL for bit-fields, and is a pointer to an INTEGER_CST node
6741 : : representing the width of the bit-field.
6742 : : DECL_ATTRS points to the list of attributes that should be added to this
6743 : : decl. Any nested attributes that belong on the decl itself will be
6744 : : added to this list.
6745 : : If EXPR is not NULL, any expressions that need to be evaluated as
6746 : : part of evaluating variably modified types will be stored in *EXPR.
6747 : : If EXPR_CONST_OPERANDS is not NULL, *EXPR_CONST_OPERANDS will be
6748 : : set to indicate whether operands in *EXPR can be used in constant
6749 : : expressions.
6750 : : DEPRECATED_STATE is a deprecated_states value indicating whether
6751 : : deprecation/unavailability warnings should be suppressed.
6752 : :
6753 : : In the TYPENAME case, DECLARATOR is really an absolute declarator.
6754 : : It may also be so in the PARM case, for a prototype where the
6755 : : argument type is specified but not the name.
6756 : :
6757 : : This function is where the complicated C meanings of `static'
6758 : : and `extern' are interpreted. */
6759 : :
6760 : : static tree
6761 : 274434329 : grokdeclarator (const struct c_declarator *declarator,
6762 : : struct c_declspecs *declspecs,
6763 : : enum decl_context decl_context, bool initialized, tree *width,
6764 : : tree *decl_attrs, tree *expr, bool *expr_const_operands,
6765 : : enum deprecated_states deprecated_state)
6766 : : {
6767 : 274434329 : tree type = declspecs->type;
6768 : 274434329 : bool threadp = declspecs->thread_p;
6769 : 274434329 : bool constexprp = declspecs->constexpr_p;
6770 : 274434329 : enum c_storage_class storage_class = declspecs->storage_class;
6771 : 274434329 : int constp;
6772 : 274434329 : int restrictp;
6773 : 274434329 : int volatilep;
6774 : 274434329 : int atomicp;
6775 : 274434329 : int type_quals = TYPE_UNQUALIFIED;
6776 : 274434329 : tree name = NULL_TREE;
6777 : 274434329 : bool funcdef_flag = false;
6778 : 274434329 : bool funcdef_syntax = false;
6779 : 274434329 : bool size_varies = false;
6780 : 274434329 : tree decl_attr = declspecs->decl_attr;
6781 : 274434329 : int array_ptr_quals = TYPE_UNQUALIFIED;
6782 : 274434329 : tree array_ptr_attrs = NULL_TREE;
6783 : 274434329 : bool array_parm_static = false;
6784 : 274434329 : bool array_parm_vla_unspec_p = false;
6785 : 274434329 : tree returned_attrs = NULL_TREE;
6786 : 274434329 : tree decl_id_attrs = NULL_TREE;
6787 : 274434329 : bool bitfield = width != NULL;
6788 : 274434329 : tree element_type;
6789 : 274434329 : tree orig_qual_type = NULL;
6790 : 274434329 : size_t orig_qual_indirect = 0;
6791 : 274434329 : struct c_arg_info *arg_info = 0;
6792 : 274434329 : addr_space_t as1, as2, address_space;
6793 : 274434329 : location_t loc = UNKNOWN_LOCATION;
6794 : 274434329 : tree expr_dummy;
6795 : 274434329 : bool expr_const_operands_dummy;
6796 : 274434329 : enum c_declarator_kind first_non_attr_kind;
6797 : 274434329 : unsigned int alignas_align = 0;
6798 : :
6799 : 274434329 : if (type == NULL_TREE)
6800 : : {
6801 : : /* This can occur for auto on a parameter in C23 mode. Set a
6802 : : dummy type here so subsequent code can give diagnostics for
6803 : : this case. */
6804 : 2 : gcc_assert (declspecs->c23_auto_p);
6805 : 2 : gcc_assert (decl_context == PARM);
6806 : 2 : type = declspecs->type = integer_type_node;
6807 : : }
6808 : 274434329 : if (TREE_CODE (type) == ERROR_MARK)
6809 : 26 : return error_mark_node;
6810 : 274434303 : if (expr == NULL)
6811 : : {
6812 : 36190 : expr = &expr_dummy;
6813 : 36190 : expr_dummy = NULL_TREE;
6814 : : }
6815 : 274434303 : if (expr_const_operands == NULL)
6816 : 169296268 : expr_const_operands = &expr_const_operands_dummy;
6817 : :
6818 : 274434303 : if (declspecs->expr)
6819 : : {
6820 : 839 : if (*expr)
6821 : 7 : *expr = build2 (COMPOUND_EXPR, TREE_TYPE (declspecs->expr), *expr,
6822 : : declspecs->expr);
6823 : : else
6824 : 832 : *expr = declspecs->expr;
6825 : : }
6826 : 274434303 : *expr_const_operands = declspecs->expr_const_operands;
6827 : :
6828 : 274434303 : if (decl_context == FUNCDEF)
6829 : 31761938 : funcdef_flag = true, decl_context = NORMAL;
6830 : :
6831 : : /* Look inside a declarator for the name being declared
6832 : : and get it as an IDENTIFIER_NODE, for an error message. */
6833 : 274434303 : {
6834 : 274434303 : const struct c_declarator *decl = declarator;
6835 : :
6836 : 274434303 : first_non_attr_kind = cdk_attrs;
6837 : 610378575 : while (decl)
6838 : 335944272 : switch (decl->kind)
6839 : : {
6840 : 1062904 : case cdk_array:
6841 : 1062904 : loc = decl->id_loc;
6842 : : /* FALL THRU. */
6843 : :
6844 : 61503441 : case cdk_function:
6845 : 61503441 : case cdk_pointer:
6846 : 61503441 : funcdef_syntax = (decl->kind == cdk_function);
6847 : 61503441 : if (first_non_attr_kind == cdk_attrs)
6848 : 59618879 : first_non_attr_kind = decl->kind;
6849 : 61503441 : decl = decl->declarator;
6850 : 61503441 : break;
6851 : :
6852 : 6528 : case cdk_attrs:
6853 : 6528 : decl = decl->declarator;
6854 : 6528 : break;
6855 : :
6856 : 274434303 : case cdk_id:
6857 : 274434303 : loc = decl->id_loc;
6858 : 274434303 : if (decl->u.id.id)
6859 : 165151063 : name = decl->u.id.id;
6860 : 274434303 : decl_id_attrs = decl->u.id.attrs;
6861 : 274434303 : if (first_non_attr_kind == cdk_attrs)
6862 : 214815424 : first_non_attr_kind = decl->kind;
6863 : : decl = 0;
6864 : : break;
6865 : :
6866 : 0 : default:
6867 : 0 : gcc_unreachable ();
6868 : : }
6869 : 274434303 : if (name == NULL_TREE)
6870 : : {
6871 : 109283240 : gcc_assert (decl_context == PARM
6872 : : || decl_context == TYPENAME
6873 : : || (decl_context == FIELD
6874 : : && declarator->kind == cdk_id));
6875 : 109283240 : gcc_assert (!initialized);
6876 : : }
6877 : : }
6878 : :
6879 : : /* An enum type specifier (": specifier-qualifier-list") may only be
6880 : : specified when the enum is being defined or in an empty
6881 : : declaration of the form "enum identifier enum-type-specifier;".
6882 : : Except for the case of an empty declaration that has additional
6883 : : declaration specifiers, all invalid contexts (declarations that
6884 : : aren't empty, type names, parameter declarations, member
6885 : : declarations) pass through grokdeclarator. */
6886 : 274434303 : if (declspecs->enum_type_specifier_ref_p)
6887 : 6 : error_at (loc, "%<enum%> underlying type may not be specified here");
6888 : :
6889 : : /* A function definition's declarator must have the form of
6890 : : a function declarator. */
6891 : :
6892 : 274434303 : if (funcdef_flag && !funcdef_syntax)
6893 : : return NULL_TREE;
6894 : :
6895 : : /* If this looks like a function definition, make it one,
6896 : : even if it occurs where parms are expected.
6897 : : Then store_parm_decls will reject it and not use it as a parm. */
6898 : 274434272 : if (decl_context == NORMAL && !funcdef_flag && current_scope->parm_flag)
6899 : 22709 : decl_context = PARM;
6900 : :
6901 : 274434272 : if (deprecated_state != UNAVAILABLE_DEPRECATED_SUPPRESS)
6902 : : {
6903 : 274434248 : if (declspecs->unavailable_p)
6904 : 28 : error_unavailable_use (declspecs->type, declspecs->decl_attr);
6905 : 274434220 : else if (declspecs->deprecated_p
6906 : 46 : && deprecated_state != DEPRECATED_SUPPRESS)
6907 : 38 : warn_deprecated_use (declspecs->type, declspecs->decl_attr);
6908 : : }
6909 : :
6910 : 274434272 : if ((decl_context == NORMAL || decl_context == FIELD)
6911 : 60730680 : && current_scope == file_scope
6912 : 327342579 : && c_type_variably_modified_p (type))
6913 : : {
6914 : 3 : if (name)
6915 : 3 : error_at (loc, "variably modified %qE at file scope", name);
6916 : : else
6917 : 0 : error_at (loc, "variably modified field at file scope");
6918 : 3 : type = integer_type_node;
6919 : : }
6920 : :
6921 : 274434272 : size_varies = C_TYPE_VARIABLE_SIZE (type) != 0;
6922 : :
6923 : : /* Diagnose defaulting to "int". */
6924 : :
6925 : 274434272 : if (declspecs->default_int_p)
6926 : : {
6927 : : /* Issue a warning if this is an ISO C 99 program or if
6928 : : -Wreturn-type and this is a function, or if -Wimplicit;
6929 : : prefer the former warning since it is more explicit. */
6930 : 9758 : if ((warn_implicit_int || warn_return_type > 0 || flag_isoc99)
6931 : 1225 : && funcdef_flag)
6932 : 702 : warn_about_return_type = 1;
6933 : : else
6934 : : {
6935 : 9056 : if (name)
6936 : 9046 : permerror_opt (loc, OPT_Wimplicit_int,
6937 : : "type defaults to %<int%> in declaration "
6938 : : "of %qE", name);
6939 : : else
6940 : 10 : permerror_opt (loc, OPT_Wimplicit_int,
6941 : : "type defaults to %<int%> in type name");
6942 : : }
6943 : : }
6944 : :
6945 : : /* Adjust the type if a bit-field is being declared,
6946 : : -funsigned-bitfields applied and the type is not explicitly
6947 : : "signed". */
6948 : 274434272 : if (bitfield && !flag_signed_bitfields && !declspecs->explicit_signed_p
6949 : 40 : && TREE_CODE (type) == INTEGER_TYPE)
6950 : 38 : type = c_common_unsigned_type (type);
6951 : :
6952 : : /* Figure out the type qualifiers for the declaration. There are
6953 : : two ways a declaration can become qualified. One is something
6954 : : like `const int i' where the `const' is explicit. Another is
6955 : : something like `typedef const int CI; CI i' where the type of the
6956 : : declaration contains the `const'. A third possibility is that
6957 : : there is a type qualifier on the element type of a typedefed
6958 : : array type, in which case we should extract that qualifier so
6959 : : that c_apply_type_quals_to_decl receives the full list of
6960 : : qualifiers to work with (C90 is not entirely clear about whether
6961 : : duplicate qualifiers should be diagnosed in this case, but it
6962 : : seems most appropriate to do so). */
6963 : 274434272 : element_type = strip_array_types (type);
6964 : 274434272 : constp = declspecs->const_p + TYPE_READONLY (element_type);
6965 : 274434272 : restrictp = declspecs->restrict_p + TYPE_RESTRICT (element_type);
6966 : 274434272 : volatilep = declspecs->volatile_p + TYPE_VOLATILE (element_type);
6967 : 274434272 : atomicp = declspecs->atomic_p + TYPE_ATOMIC (element_type);
6968 : 274434272 : as1 = declspecs->address_space;
6969 : 274434272 : as2 = TYPE_ADDR_SPACE (element_type);
6970 : 274434272 : address_space = ADDR_SPACE_GENERIC_P (as1)? as2 : as1;
6971 : :
6972 : 274434272 : if (constp > 1)
6973 : 25 : pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<const%>");
6974 : 274434272 : if (restrictp > 1)
6975 : 6 : pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<restrict%>");
6976 : 274434272 : if (volatilep > 1)
6977 : 15 : pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<volatile%>");
6978 : 274434272 : if (atomicp > 1)
6979 : 9 : pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<_Atomic%>");
6980 : :
6981 : 274434272 : if (!ADDR_SPACE_GENERIC_P (as1) && !ADDR_SPACE_GENERIC_P (as2) && as1 != as2)
6982 : 0 : error_at (loc, "conflicting named address spaces (%s vs %s)",
6983 : : c_addr_space_name (as1), c_addr_space_name (as2));
6984 : :
6985 : 274434272 : if ((TREE_CODE (type) == ARRAY_TYPE
6986 : 274265854 : || first_non_attr_kind == cdk_array)
6987 : 275431413 : && TYPE_QUALS (element_type))
6988 : : {
6989 : 44 : orig_qual_type = type;
6990 : 44 : type = TYPE_MAIN_VARIANT (type);
6991 : : }
6992 : 274434272 : type_quals = ((constp ? TYPE_QUAL_CONST : 0)
6993 : 274434272 : | (restrictp ? TYPE_QUAL_RESTRICT : 0)
6994 : 274434272 : | (volatilep ? TYPE_QUAL_VOLATILE : 0)
6995 : 274434272 : | (atomicp ? TYPE_QUAL_ATOMIC : 0)
6996 : 274434272 : | ENCODE_QUAL_ADDR_SPACE (address_space));
6997 : 274434272 : if (type_quals != TYPE_QUALS (element_type))
6998 : 11114460 : orig_qual_type = NULL_TREE;
6999 : :
7000 : : /* Applying the _Atomic qualifier to an array type (through the use
7001 : : of typedefs or typeof) must be detected here. If the qualifier
7002 : : is introduced later, any appearance of applying it to an array is
7003 : : actually applying it to an element of that array. */
7004 : 274434272 : if (declspecs->atomic_p && TREE_CODE (type) == ARRAY_TYPE)
7005 : 6 : error_at (loc, "%<_Atomic%>-qualified array type");
7006 : :
7007 : : /* Warn about storage classes that are invalid for certain
7008 : : kinds of declarations (parameters, typenames, etc.). */
7009 : :
7010 : 274434272 : if (funcdef_flag
7011 : 31761907 : && (threadp
7012 : : || constexprp
7013 : 31761905 : || storage_class == csc_auto
7014 : 31761905 : || storage_class == csc_register
7015 : 31761862 : || storage_class == csc_typedef))
7016 : : {
7017 : 45 : if (storage_class == csc_auto)
7018 : 40 : pedwarn (loc,
7019 : 40 : (current_scope == file_scope) ? 0 : OPT_Wpedantic,
7020 : : "function definition declared %<auto%>");
7021 : 48 : if (storage_class == csc_register)
7022 : 3 : error_at (loc, "function definition declared %<register%>");
7023 : 48 : if (storage_class == csc_typedef)
7024 : 3 : error_at (loc, "function definition declared %<typedef%>");
7025 : 48 : if (threadp)
7026 : 2 : error_at (loc, "function definition declared %qs",
7027 : 2 : declspecs->thread_gnu_p ? "__thread" : "_Thread_local");
7028 : 48 : threadp = false;
7029 : : /* The parser ensures a constexpr function definition never
7030 : : reaches here. */
7031 : 48 : gcc_assert (!constexprp);
7032 : 48 : if (storage_class == csc_auto
7033 : 48 : || storage_class == csc_register
7034 : : || storage_class == csc_typedef)
7035 : 53 : storage_class = csc_none;
7036 : : }
7037 : 274434224 : else if (decl_context != NORMAL && (storage_class != csc_none
7038 : 217553739 : || threadp
7039 : 217553153 : || constexprp
7040 : 217553151 : || declspecs->c23_auto_p))
7041 : : {
7042 : 590 : if (decl_context == PARM
7043 : 590 : && storage_class == csc_register
7044 : 571 : && !constexprp
7045 : 569 : && !declspecs->c23_auto_p)
7046 : : ;
7047 : : else
7048 : : {
7049 : 21 : switch (decl_context)
7050 : : {
7051 : 0 : case FIELD:
7052 : 0 : if (name)
7053 : 0 : error_at (loc, "storage class specified for structure "
7054 : : "field %qE", name);
7055 : : else
7056 : 0 : error_at (loc, "storage class specified for structure field");
7057 : : break;
7058 : 21 : case PARM:
7059 : 21 : if (name)
7060 : 7 : error_at (loc, "storage class specified for parameter %qE",
7061 : : name);
7062 : : else
7063 : 14 : error_at (loc, "storage class specified for unnamed parameter");
7064 : : break;
7065 : 0 : default:
7066 : 0 : error_at (loc, "storage class specified for typename");
7067 : 0 : break;
7068 : : }
7069 : 274434272 : storage_class = csc_none;
7070 : 274434272 : threadp = false;
7071 : 274434272 : constexprp = false;
7072 : : }
7073 : : }
7074 : 274433634 : else if (storage_class == csc_extern
7075 : 274433634 : && initialized
7076 : 30954788 : && !funcdef_flag)
7077 : : {
7078 : : /* 'extern' with initialization is invalid if not at file scope. */
7079 : 24 : if (current_scope == file_scope)
7080 : : {
7081 : : /* It is fine to have 'extern const' when compiling at C
7082 : : and C++ intersection. */
7083 : 19 : if (!(warn_cxx_compat && constp))
7084 : 18 : warning_at (loc, 0, "%qE initialized and declared %<extern%>",
7085 : : name);
7086 : : }
7087 : : else
7088 : 5 : error_at (loc, "%qE has both %<extern%> and initializer", name);
7089 : : }
7090 : 274433610 : else if (current_scope == file_scope)
7091 : : {
7092 : 53787118 : if (storage_class == csc_auto)
7093 : 7 : error_at (loc, "file-scope declaration of %qE specifies %<auto%>",
7094 : : name);
7095 : 53787118 : if (pedantic && storage_class == csc_register)
7096 : 4 : pedwarn (input_location, OPT_Wpedantic,
7097 : : "file-scope declaration of %qE specifies %<register%>", name);
7098 : : }
7099 : : else
7100 : : {
7101 : 220646492 : if (storage_class == csc_extern && funcdef_flag)
7102 : 3 : error_at (loc, "nested function %qE declared %<extern%>", name);
7103 : 220646489 : else if (threadp && storage_class == csc_none)
7104 : : {
7105 : 4 : error_at (loc, "function-scope %qE implicitly auto and declared "
7106 : : "%qs", name,
7107 : 2 : declspecs->thread_gnu_p ? "__thread" : "_Thread_local");
7108 : 2 : threadp = false;
7109 : : }
7110 : : }
7111 : :
7112 : : /* Now figure out the structure of the declarator proper.
7113 : : Descend through it, creating more complex types, until we reach
7114 : : the declared identifier (or NULL_TREE, in an absolute declarator).
7115 : : At each stage we maintain an unqualified version of the type
7116 : : together with any qualifiers that should be applied to it with
7117 : : c_build_qualified_type; this way, array types including
7118 : : multidimensional array types are first built up in unqualified
7119 : : form and then the qualified form is created with
7120 : : TYPE_MAIN_VARIANT pointing to the unqualified form. */
7121 : :
7122 : 335944240 : while (declarator && declarator->kind != cdk_id)
7123 : : {
7124 : 61509968 : if (type == error_mark_node)
7125 : : {
7126 : 38 : declarator = declarator->declarator;
7127 : 38 : continue;
7128 : : }
7129 : :
7130 : : /* Each level of DECLARATOR is either a cdk_array (for ...[..]),
7131 : : a cdk_pointer (for *...),
7132 : : a cdk_function (for ...(...)),
7133 : : a cdk_attrs (for nested attributes),
7134 : : or a cdk_id (for the name being declared
7135 : : or the place in an absolute declarator
7136 : : where the name was omitted).
7137 : : For the last case, we have just exited the loop.
7138 : :
7139 : : At this point, TYPE is the type of elements of an array,
7140 : : or for a function to return, or for a pointer to point to.
7141 : : After this sequence of ifs, TYPE is the type of the
7142 : : array or function or pointer, and DECLARATOR has had its
7143 : : outermost layer removed. */
7144 : :
7145 : 61509930 : if (array_ptr_quals != TYPE_UNQUALIFIED
7146 : 61509930 : || array_ptr_attrs != NULL_TREE
7147 : 61509930 : || array_parm_static)
7148 : : {
7149 : : /* Only the innermost declarator (making a parameter be of
7150 : : array type which is converted to pointer type)
7151 : : may have static or type qualifiers. */
7152 : 1 : error_at (loc, "static or type qualifiers in non-parameter array declarator");
7153 : 1 : array_ptr_quals = TYPE_UNQUALIFIED;
7154 : 1 : array_ptr_attrs = NULL_TREE;
7155 : 1 : array_parm_static = false;
7156 : : }
7157 : :
7158 : 61509930 : bool varmod = C_TYPE_VARIABLY_MODIFIED (type);
7159 : :
7160 : 61509930 : switch (declarator->kind)
7161 : : {
7162 : 6528 : case cdk_attrs:
7163 : 6528 : {
7164 : : /* A declarator with embedded attributes. */
7165 : 6528 : tree attrs = declarator->u.attrs;
7166 : 6528 : const struct c_declarator *inner_decl;
7167 : 6528 : int attr_flags = 0;
7168 : 6528 : declarator = declarator->declarator;
7169 : : /* Standard attribute syntax precisely defines what entity
7170 : : an attribute in each position appertains to, so only
7171 : : apply laxity about positioning to GNU attribute syntax.
7172 : : Standard attributes applied to a function or array
7173 : : declarator apply exactly to that type; standard
7174 : : attributes applied to the identifier apply to the
7175 : : declaration rather than to the type, and are specified
7176 : : using a cdk_id declarator rather than using
7177 : : cdk_attrs. */
7178 : 6528 : inner_decl = declarator;
7179 : 6528 : while (inner_decl->kind == cdk_attrs)
7180 : 0 : inner_decl = inner_decl->declarator;
7181 : 6528 : if (!cxx11_attribute_p (attrs))
7182 : : {
7183 : 6504 : if (inner_decl->kind == cdk_id)
7184 : : attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7185 : : else if (inner_decl->kind == cdk_function)
7186 : : attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7187 : : else if (inner_decl->kind == cdk_array)
7188 : 6528 : attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7189 : : }
7190 : 6528 : attrs = c_warn_type_attributes (attrs);
7191 : 6528 : returned_attrs = decl_attributes (&type,
7192 : : chainon (returned_attrs, attrs),
7193 : : attr_flags);
7194 : 6528 : break;
7195 : : }
7196 : 1062894 : case cdk_array:
7197 : 1062894 : {
7198 : 1062894 : tree itype = NULL_TREE;
7199 : 1062894 : tree size = declarator->u.array.dimen;
7200 : : /* The index is a signed object `sizetype' bits wide. */
7201 : 1062894 : tree index_type = c_common_signed_type (sizetype);
7202 : :
7203 : 1062894 : array_ptr_quals = declarator->u.array.quals;
7204 : 1062894 : array_ptr_attrs = declarator->u.array.attrs;
7205 : 1062894 : array_parm_static = declarator->u.array.static_p;
7206 : 1062894 : array_parm_vla_unspec_p = declarator->u.array.vla_unspec_p;
7207 : :
7208 : 1062894 : declarator = declarator->declarator;
7209 : :
7210 : : /* Check for some types that there cannot be arrays of. */
7211 : :
7212 : 1062894 : if (VOID_TYPE_P (type))
7213 : : {
7214 : 11 : if (name)
7215 : 9 : error_at (loc, "declaration of %qE as array of voids", name);
7216 : : else
7217 : 2 : error_at (loc, "declaration of type name as array of voids");
7218 : 11 : type = error_mark_node;
7219 : : }
7220 : :
7221 : 1062894 : if (TREE_CODE (type) == FUNCTION_TYPE)
7222 : : {
7223 : 3 : if (name)
7224 : 2 : error_at (loc, "declaration of %qE as array of functions",
7225 : : name);
7226 : : else
7227 : 1 : error_at (loc, "declaration of type name as array of "
7228 : : "functions");
7229 : 3 : type = error_mark_node;
7230 : : }
7231 : :
7232 : 21654 : if (pedantic && !in_system_header_at (input_location)
7233 : 1077389 : && flexible_array_type_p (type))
7234 : 20 : pedwarn (loc, OPT_Wpedantic,
7235 : : "invalid use of structure with flexible array member");
7236 : :
7237 : 1062894 : if (size == error_mark_node)
7238 : 114 : type = error_mark_node;
7239 : :
7240 : 1062894 : if (type == error_mark_node)
7241 : 128 : continue;
7242 : :
7243 : 1062766 : if (!verify_type_context (loc, TCTX_ARRAY_ELEMENT, type))
7244 : : {
7245 : 0 : type = error_mark_node;
7246 : 0 : continue;
7247 : : }
7248 : :
7249 : : /* If size was specified, set ITYPE to a range-type for
7250 : : that size. Otherwise, ITYPE remains null. finish_decl
7251 : : may figure it out from an initial value. */
7252 : :
7253 : 1062766 : if (size)
7254 : : {
7255 : 920628 : bool size_maybe_const = true;
7256 : 920628 : bool size_int_const = (TREE_CODE (size) == INTEGER_CST
7257 : 920628 : && !TREE_OVERFLOW (size));
7258 : 920628 : bool this_size_varies = false;
7259 : :
7260 : : /* Strip NON_LVALUE_EXPRs since we aren't using as an
7261 : : lvalue. */
7262 : 920637 : STRIP_TYPE_NOPS (size);
7263 : :
7264 : 920628 : if (!INTEGRAL_TYPE_P (TREE_TYPE (size)))
7265 : : {
7266 : 16 : if (name)
7267 : 14 : error_at (loc, "size of array %qE has non-integer type",
7268 : : name);
7269 : : else
7270 : 2 : error_at (loc,
7271 : : "size of unnamed array has non-integer type");
7272 : 16 : size = integer_one_node;
7273 : 16 : size_int_const = true;
7274 : : }
7275 : : /* This can happen with enum forward declaration. */
7276 : 920612 : else if (!COMPLETE_TYPE_P (TREE_TYPE (size)))
7277 : : {
7278 : 0 : if (name)
7279 : 0 : error_at (loc, "size of array %qE has incomplete type",
7280 : : name);
7281 : : else
7282 : 0 : error_at (loc, "size of unnamed array has incomplete "
7283 : : "type");
7284 : 0 : size = integer_one_node;
7285 : 0 : size_int_const = true;
7286 : : }
7287 : :
7288 : 920628 : size = c_fully_fold (size, false, &size_maybe_const);
7289 : :
7290 : 920628 : if (pedantic && size_maybe_const && integer_zerop (size))
7291 : : {
7292 : 3 : if (name)
7293 : 3 : pedwarn (loc, OPT_Wpedantic,
7294 : : "ISO C forbids zero-size array %qE", name);
7295 : : else
7296 : 0 : pedwarn (loc, OPT_Wpedantic,
7297 : : "ISO C forbids zero-size array");
7298 : : }
7299 : :
7300 : 920628 : if (TREE_CODE (size) == INTEGER_CST && size_maybe_const)
7301 : : {
7302 : 898615 : constant_expression_warning (size);
7303 : 898615 : if (tree_int_cst_sgn (size) < 0)
7304 : : {
7305 : 772 : if (name)
7306 : 769 : error_at (loc, "size of array %qE is negative", name);
7307 : : else
7308 : 3 : error_at (loc, "size of unnamed array is negative");
7309 : 772 : size = integer_one_node;
7310 : 772 : size_int_const = true;
7311 : : }
7312 : : /* Handle a size folded to an integer constant but
7313 : : not an integer constant expression. */
7314 : 898615 : if (!size_int_const)
7315 : : {
7316 : : /* If this is a file scope declaration of an
7317 : : ordinary identifier, this is invalid code;
7318 : : diagnosing it here and not subsequently
7319 : : treating the type as variable-length avoids
7320 : : more confusing diagnostics later. */
7321 : 145 : if ((decl_context == NORMAL || decl_context == FIELD)
7322 : 134 : && current_scope == file_scope)
7323 : 14 : pedwarn (input_location, 0,
7324 : : "variably modified %qE at file scope",
7325 : : name);
7326 : : else
7327 : : this_size_varies = size_varies = true;
7328 : 145 : warn_variable_length_array (name, size);
7329 : : }
7330 : : }
7331 : 22013 : else if ((decl_context == NORMAL || decl_context == FIELD)
7332 : 13083 : && current_scope == file_scope)
7333 : : {
7334 : 21 : error_at (loc, "variably modified %qE at file scope", name);
7335 : 21 : size = integer_one_node;
7336 : : }
7337 : : else
7338 : : {
7339 : : /* Make sure the array size remains visibly
7340 : : nonconstant even if it is (eg) a const variable
7341 : : with known value. */
7342 : 21992 : this_size_varies = size_varies = true;
7343 : 21992 : warn_variable_length_array (name, size);
7344 : 21992 : if (sanitize_flags_p (SANITIZE_VLA)
7345 : 178 : && current_function_decl != NULL_TREE
7346 : 22152 : && decl_context == NORMAL)
7347 : : {
7348 : : /* Evaluate the array size only once. */
7349 : 152 : size = save_expr (size);
7350 : 152 : size = c_fully_fold (size, false, NULL);
7351 : 152 : size = fold_build2 (COMPOUND_EXPR, TREE_TYPE (size),
7352 : : ubsan_instrument_vla (loc, size),
7353 : : size);
7354 : : }
7355 : : }
7356 : :
7357 : 920628 : if (integer_zerop (size) && !this_size_varies)
7358 : : {
7359 : : /* A zero-length array cannot be represented with
7360 : : an unsigned index type, which is what we'll
7361 : : get with build_index_type. Create an
7362 : : open-ended range instead. */
7363 : 2519 : itype = build_range_type (sizetype, size, NULL_TREE);
7364 : : }
7365 : : else
7366 : : {
7367 : : /* Arrange for the SAVE_EXPR on the inside of the
7368 : : MINUS_EXPR, which allows the -1 to get folded
7369 : : with the +1 that happens when building TYPE_SIZE. */
7370 : 918109 : if (size_varies)
7371 : 22468 : size = save_expr (size);
7372 : 918109 : if (this_size_varies && TREE_CODE (size) == INTEGER_CST)
7373 : 131 : size = build2 (COMPOUND_EXPR, TREE_TYPE (size),
7374 : : integer_zero_node, size);
7375 : :
7376 : : /* Compute the maximum valid index, that is, size
7377 : : - 1. Do the calculation in index_type, so that
7378 : : if it is a variable the computations will be
7379 : : done in the proper mode. */
7380 : 918109 : itype = fold_build2_loc (loc, MINUS_EXPR, index_type,
7381 : : convert (index_type, size),
7382 : : convert (index_type,
7383 : : size_one_node));
7384 : :
7385 : : /* The above overflows when size does not fit
7386 : : in index_type.
7387 : : ??? While a size of INT_MAX+1 technically shouldn't
7388 : : cause an overflow (because we subtract 1), handling
7389 : : this case seems like an unnecessary complication. */
7390 : 918109 : if (TREE_CODE (size) == INTEGER_CST
7391 : 895986 : && !int_fits_type_p (size, index_type))
7392 : : {
7393 : 6 : if (name)
7394 : 5 : error_at (loc, "size of array %qE is too large",
7395 : : name);
7396 : : else
7397 : 1 : error_at (loc, "size of unnamed array is too large");
7398 : 6 : type = error_mark_node;
7399 : 6 : continue;
7400 : : }
7401 : :
7402 : 918103 : itype = build_index_type (itype);
7403 : : }
7404 : 920622 : if (this_size_varies)
7405 : : {
7406 : 22123 : if (TREE_SIDE_EFFECTS (size))
7407 : : {
7408 : 21846 : if (*expr)
7409 : 8148 : *expr = build2 (COMPOUND_EXPR, TREE_TYPE (size),
7410 : : *expr, size);
7411 : : else
7412 : 13698 : *expr = size;
7413 : : }
7414 : 22123 : *expr_const_operands &= size_maybe_const;
7415 : : }
7416 : : }
7417 : 142138 : else if (decl_context == FIELD)
7418 : : {
7419 : 59677 : bool flexible_array_member = false;
7420 : 59677 : if (array_parm_vla_unspec_p)
7421 : : /* Field names can in fact have function prototype
7422 : : scope so [*] is disallowed here through making
7423 : : the field variably modified, not through being
7424 : : something other than a declaration with function
7425 : : prototype scope. */
7426 : : size_varies = true;
7427 : : else
7428 : : {
7429 : : const struct c_declarator *t = declarator;
7430 : 59675 : while (t->kind == cdk_attrs)
7431 : 0 : t = t->declarator;
7432 : 59675 : flexible_array_member = (t->kind == cdk_id);
7433 : : }
7434 : 59675 : if (flexible_array_member
7435 : 59675 : && !in_system_header_at (input_location))
7436 : 58651 : pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not "
7437 : : "support flexible array members");
7438 : :
7439 : : /* ISO C99 Flexible array members are effectively
7440 : : identical to GCC's zero-length array extension. */
7441 : 59677 : if (flexible_array_member || array_parm_vla_unspec_p)
7442 : 59657 : itype = build_range_type (sizetype, size_zero_node,
7443 : : NULL_TREE);
7444 : : }
7445 : 82461 : else if (decl_context == PARM)
7446 : : {
7447 : 62611 : if (array_parm_vla_unspec_p)
7448 : : {
7449 : 125 : itype = build_range_type (sizetype, size_zero_node, NULL_TREE);
7450 : 125 : size_varies = true;
7451 : : }
7452 : : }
7453 : 19850 : else if (decl_context == TYPENAME)
7454 : : {
7455 : 316 : if (array_parm_vla_unspec_p)
7456 : : {
7457 : : /* C99 6.7.5.2p4 */
7458 : 5 : warning (0, "%<[*]%> not in a declaration");
7459 : : /* We use this to avoid messing up with incomplete
7460 : : array types of the same type, that would
7461 : : otherwise be modified below. */
7462 : 5 : itype = build_range_type (sizetype, size_zero_node,
7463 : : NULL_TREE);
7464 : 5 : size_varies = true;
7465 : : }
7466 : : }
7467 : :
7468 : : /* Complain about arrays of incomplete types. */
7469 : 1062760 : if (!COMPLETE_TYPE_P (type))
7470 : : {
7471 : 57 : auto_diagnostic_group d;
7472 : 57 : error_at (loc, "array type has incomplete element type %qT",
7473 : : type);
7474 : : /* See if we can be more helpful. */
7475 : 57 : if (TREE_CODE (type) == ARRAY_TYPE)
7476 : : {
7477 : 29 : if (name)
7478 : 24 : inform (loc, "declaration of %qE as multidimensional "
7479 : : "array must have bounds for all dimensions "
7480 : : "except the first", name);
7481 : : else
7482 : 5 : inform (loc, "declaration of multidimensional array "
7483 : : "must have bounds for all dimensions except "
7484 : : "the first");
7485 : : }
7486 : 57 : type = error_mark_node;
7487 : 57 : }
7488 : : else
7489 : : /* When itype is NULL, a shared incomplete array type is
7490 : : returned for all array of a given type. Elsewhere we
7491 : : make sure we don't complete that type before copying
7492 : : it, but here we want to make sure we don't ever
7493 : : modify the shared type, so we gcc_assert (itype)
7494 : : below. */
7495 : : {
7496 : 1062703 : addr_space_t as = DECODE_QUAL_ADDR_SPACE (type_quals);
7497 : 1062703 : if (!ADDR_SPACE_GENERIC_P (as) && as != TYPE_ADDR_SPACE (type))
7498 : 0 : type = build_qualified_type (type,
7499 : : ENCODE_QUAL_ADDR_SPACE (as));
7500 : :
7501 : 1062703 : type = build_array_type (type, itype);
7502 : : }
7503 : :
7504 : 1062760 : if (type != error_mark_node)
7505 : : {
7506 : 1062703 : if (size_varies)
7507 : : {
7508 : : /* It is ok to modify type here even if itype is
7509 : : NULL: if size_varies, we're in a
7510 : : multi-dimensional array and the inner type has
7511 : : variable size, so the enclosing shared array type
7512 : : must too. */
7513 : 22740 : if (size && TREE_CODE (size) == INTEGER_CST)
7514 : 361 : type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type));
7515 : 22740 : C_TYPE_VARIABLE_SIZE (type) = 1;
7516 : : }
7517 : :
7518 : : /* The GCC extension for zero-length arrays differs from
7519 : : ISO flexible array members in that sizeof yields
7520 : : zero. */
7521 : 1062703 : if (size && integer_zerop (size))
7522 : : {
7523 : 2512 : gcc_assert (itype);
7524 : 2512 : type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type));
7525 : 2512 : TYPE_SIZE (type) = bitsize_zero_node;
7526 : 2512 : TYPE_SIZE_UNIT (type) = size_zero_node;
7527 : 2512 : SET_TYPE_STRUCTURAL_EQUALITY (type);
7528 : : }
7529 : 1062703 : if (array_parm_vla_unspec_p)
7530 : : {
7531 : 132 : gcc_assert (itype);
7532 : : /* The type is complete. C99 6.7.5.2p4 */
7533 : 132 : type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type));
7534 : 132 : TYPE_SIZE (type) = bitsize_zero_node;
7535 : 132 : TYPE_SIZE_UNIT (type) = size_zero_node;
7536 : 132 : SET_TYPE_STRUCTURAL_EQUALITY (type);
7537 : : }
7538 : :
7539 : 1062703 : if (!valid_array_size_p (loc, type, name))
7540 : 33 : type = error_mark_node;
7541 : : }
7542 : :
7543 : 1062760 : if (decl_context != PARM
7544 : 758902 : && (array_ptr_quals != TYPE_UNQUALIFIED
7545 : 758902 : || array_ptr_attrs != NULL_TREE
7546 : 758901 : || array_parm_static))
7547 : : {
7548 : 2 : error_at (loc, "static or type qualifiers in non-parameter "
7549 : : "array declarator");
7550 : 2 : array_ptr_quals = TYPE_UNQUALIFIED;
7551 : 2 : array_ptr_attrs = NULL_TREE;
7552 : 2 : array_parm_static = false;
7553 : : }
7554 : 1062760 : orig_qual_indirect++;
7555 : 1062760 : break;
7556 : : }
7557 : 43842178 : case cdk_function:
7558 : 43842178 : {
7559 : : /* Say it's a definition only for the declarator closest
7560 : : to the identifier, apart possibly from some
7561 : : attributes. */
7562 : 43842178 : bool really_funcdef = false;
7563 : 43842178 : tree arg_types;
7564 : 43842178 : orig_qual_type = NULL_TREE;
7565 : 43842178 : if (funcdef_flag)
7566 : : {
7567 : 31761927 : const struct c_declarator *t = declarator->declarator;
7568 : 31761931 : while (t->kind == cdk_attrs)
7569 : 4 : t = t->declarator;
7570 : 31761927 : really_funcdef = (t->kind == cdk_id);
7571 : : }
7572 : :
7573 : : /* Declaring a function type. Make sure we have a valid
7574 : : type for the function to return. */
7575 : 43842178 : if (type == error_mark_node)
7576 : 0 : continue;
7577 : :
7578 : 43842178 : size_varies = false;
7579 : :
7580 : : /* Warn about some types functions can't return. */
7581 : 43842178 : if (TREE_CODE (type) == FUNCTION_TYPE)
7582 : : {
7583 : 0 : if (name)
7584 : 0 : error_at (loc, "%qE declared as function returning a "
7585 : : "function", name);
7586 : : else
7587 : 0 : error_at (loc, "type name declared as function "
7588 : : "returning a function");
7589 : 0 : type = integer_type_node;
7590 : : }
7591 : 43842178 : if (TREE_CODE (type) == ARRAY_TYPE)
7592 : : {
7593 : 0 : if (name)
7594 : 0 : error_at (loc, "%qE declared as function returning an array",
7595 : : name);
7596 : : else
7597 : 0 : error_at (loc, "type name declared as function returning "
7598 : : "an array");
7599 : 0 : type = integer_type_node;
7600 : : }
7601 : :
7602 : : /* Construct the function type and go to the next
7603 : : inner layer of declarator. */
7604 : 43842178 : arg_info = declarator->u.arg_info;
7605 : 43842178 : arg_types = grokparms (arg_info, really_funcdef);
7606 : :
7607 : : /* Type qualifiers before the return type of the function
7608 : : qualify the return type, not the function type. */
7609 : 43842178 : if (type_quals)
7610 : : {
7611 : 122 : const enum c_declspec_word ignored_quals_list[] =
7612 : : {
7613 : : cdw_const, cdw_volatile, cdw_restrict, cdw_address_space,
7614 : : cdw_atomic, cdw_number_of_elements
7615 : : };
7616 : 122 : location_t specs_loc
7617 : 122 : = smallest_type_quals_location (declspecs->locations,
7618 : : ignored_quals_list);
7619 : 122 : if (specs_loc == UNKNOWN_LOCATION)
7620 : 27 : specs_loc = declspecs->locations[cdw_typedef];
7621 : 27 : if (specs_loc == UNKNOWN_LOCATION)
7622 : 15 : specs_loc = loc;
7623 : :
7624 : : /* Type qualifiers on a function return type are
7625 : : normally permitted by the standard but have no
7626 : : effect, so give a warning at -Wreturn-type.
7627 : : Qualifiers on a void return type are banned on
7628 : : function definitions in ISO C; GCC used to used
7629 : : them for noreturn functions. The resolution of C11
7630 : : DR#423 means qualifiers (other than _Atomic) are
7631 : : actually removed from the return type when
7632 : : determining the function type. For C23, _Atomic is
7633 : : removed as well. */
7634 : 122 : int quals_used = type_quals;
7635 : 122 : if (flag_isoc23)
7636 : : quals_used = 0;
7637 : 105 : else if (flag_isoc11)
7638 : 71 : quals_used &= TYPE_QUAL_ATOMIC;
7639 : 105 : if (quals_used && VOID_TYPE_P (type) && really_funcdef)
7640 : 5 : pedwarn (specs_loc, 0,
7641 : : "function definition has qualified void "
7642 : : "return type");
7643 : : else
7644 : 117 : warning_at (specs_loc, OPT_Wignored_qualifiers,
7645 : : "type qualifiers ignored on function "
7646 : : "return type");
7647 : :
7648 : : /* Ensure an error for restrict on invalid types; the
7649 : : DR#423 resolution is not entirely clear about
7650 : : this. */
7651 : 122 : if (flag_isoc11
7652 : 88 : && (type_quals & TYPE_QUAL_RESTRICT)
7653 : 128 : && (!POINTER_TYPE_P (type)
7654 : 4 : || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))))
7655 : 4 : error_at (loc, "invalid use of %<restrict%>");
7656 : 122 : type = c_build_qualified_type (type, quals_used);
7657 : : }
7658 : 43842178 : type_quals = TYPE_UNQUALIFIED;
7659 : :
7660 : 87684356 : type = build_function_type (type, arg_types,
7661 : 43842178 : arg_info->no_named_args_stdarg_p);
7662 : 43842178 : declarator = declarator->declarator;
7663 : :
7664 : : /* Set the TYPE_CONTEXTs for each tagged type which is local to
7665 : : the formal parameter list of this FUNCTION_TYPE to point to
7666 : : the FUNCTION_TYPE node itself. */
7667 : 43842178 : {
7668 : 43842178 : c_arg_tag *tag;
7669 : 43842178 : unsigned ix;
7670 : :
7671 : 43842434 : FOR_EACH_VEC_SAFE_ELT_REVERSE (arg_info->tags, ix, tag)
7672 : 129 : TYPE_CONTEXT (tag->type) = type;
7673 : : }
7674 : : break;
7675 : : }
7676 : 16598330 : case cdk_pointer:
7677 : 16598330 : {
7678 : : /* Merge any constancy or volatility into the target type
7679 : : for the pointer. */
7680 : 16598330 : if ((type_quals & TYPE_QUAL_ATOMIC)
7681 : 1749 : && TREE_CODE (type) == FUNCTION_TYPE)
7682 : : {
7683 : 2 : error_at (loc,
7684 : : "%<_Atomic%>-qualified function type");
7685 : 2 : type_quals &= ~TYPE_QUAL_ATOMIC;
7686 : : }
7687 : 16598328 : else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
7688 : 1670 : && type_quals)
7689 : 0 : pedwarn (loc, OPT_Wpedantic,
7690 : : "ISO C forbids qualified function types");
7691 : 16596660 : if (type_quals)
7692 : 5251058 : type = c_build_qualified_type (type, type_quals, orig_qual_type,
7693 : : orig_qual_indirect);
7694 : 16598330 : orig_qual_type = NULL_TREE;
7695 : 16598330 : size_varies = false;
7696 : :
7697 : : /* When the pointed-to type involves components of variable size,
7698 : : care must be taken to ensure that the size evaluation code is
7699 : : emitted early enough to dominate all the possible later uses
7700 : : and late enough for the variables on which it depends to have
7701 : : been assigned.
7702 : :
7703 : : This is expected to happen automatically when the pointed-to
7704 : : type has a name/declaration of it's own, but special attention
7705 : : is required if the type is anonymous. */
7706 : 16598330 : if (!TYPE_NAME (type) && c_type_variably_modified_p (type))
7707 : : {
7708 : 5823 : bool bind_p = decl_context == TYPENAME
7709 : : || decl_context == FIELD
7710 : 5823 : || decl_context == PARM;
7711 : 11248 : add_decl_expr (loc, type, bind_p ? expr : NULL, true);
7712 : : }
7713 : :
7714 : 16598330 : type = c_build_pointer_type (type);
7715 : :
7716 : : /* Process type qualifiers (such as const or volatile)
7717 : : that were given inside the `*'. */
7718 : 16598330 : type_quals = declarator->u.pointer_quals;
7719 : :
7720 : 16598330 : declarator = declarator->declarator;
7721 : 16598330 : break;
7722 : : }
7723 : 0 : default:
7724 : 0 : gcc_unreachable ();
7725 : : }
7726 : 61509796 : if (type != error_mark_node)
7727 : 61509706 : C_TYPE_VARIABLY_MODIFIED (type) = varmod || size_varies;
7728 : : }
7729 : 274434272 : *decl_attrs = chainon (returned_attrs, *decl_attrs);
7730 : 274434272 : *decl_attrs = chainon (decl_id_attrs, *decl_attrs);
7731 : :
7732 : : /* Now TYPE has the actual type, apart from any qualifiers in
7733 : : TYPE_QUALS. */
7734 : :
7735 : : /* Warn about address space used for things other than static memory or
7736 : : pointers. */
7737 : 274434272 : address_space = DECODE_QUAL_ADDR_SPACE (type_quals);
7738 : 274434272 : if (!ADDR_SPACE_GENERIC_P (address_space))
7739 : : {
7740 : 7 : if (decl_context == NORMAL)
7741 : : {
7742 : 7 : switch (storage_class)
7743 : : {
7744 : 0 : case csc_auto:
7745 : 0 : error ("%qs combined with %<auto%> qualifier for %qE",
7746 : : c_addr_space_name (address_space), name);
7747 : 0 : break;
7748 : 0 : case csc_register:
7749 : 0 : error ("%qs combined with %<register%> qualifier for %qE",
7750 : : c_addr_space_name (address_space), name);
7751 : 0 : break;
7752 : 3 : case csc_none:
7753 : 3 : if (current_function_scope)
7754 : : {
7755 : 0 : error ("%qs specified for auto variable %qE",
7756 : : c_addr_space_name (address_space), name);
7757 : 0 : break;
7758 : : }
7759 : : break;
7760 : : case csc_static:
7761 : : case csc_extern:
7762 : : case csc_typedef:
7763 : : break;
7764 : 0 : default:
7765 : 0 : gcc_unreachable ();
7766 : : }
7767 : : }
7768 : 0 : else if (decl_context == PARM && TREE_CODE (type) != ARRAY_TYPE)
7769 : : {
7770 : 0 : if (name)
7771 : 0 : error ("%qs specified for parameter %qE",
7772 : : c_addr_space_name (address_space), name);
7773 : : else
7774 : 0 : error ("%qs specified for unnamed parameter",
7775 : : c_addr_space_name (address_space));
7776 : : }
7777 : 0 : else if (decl_context == FIELD)
7778 : : {
7779 : 0 : if (name)
7780 : 0 : error ("%qs specified for structure field %qE",
7781 : : c_addr_space_name (address_space), name);
7782 : : else
7783 : 0 : error ("%qs specified for structure field",
7784 : : c_addr_space_name (address_space));
7785 : : }
7786 : : }
7787 : :
7788 : : /* Check the type and width of a bit-field. */
7789 : 274434272 : if (bitfield)
7790 : : {
7791 : 39375 : check_bitfield_type_and_width (loc, &type, width, name);
7792 : : /* C11 makes it implementation-defined (6.7.2.1#5) whether
7793 : : atomic types are permitted for bit-fields; we have no code to
7794 : : make bit-field accesses atomic, so disallow them. */
7795 : 39375 : if (type_quals & TYPE_QUAL_ATOMIC)
7796 : : {
7797 : 2 : if (name)
7798 : 1 : error_at (loc, "bit-field %qE has atomic type", name);
7799 : : else
7800 : 1 : error_at (loc, "bit-field has atomic type");
7801 : 2 : type_quals &= ~TYPE_QUAL_ATOMIC;
7802 : : }
7803 : : }
7804 : :
7805 : : /* Reject invalid uses of _Alignas. */
7806 : 274434272 : if (declspecs->alignas_p)
7807 : : {
7808 : 182 : if (storage_class == csc_typedef)
7809 : 1 : error_at (loc, "alignment specified for typedef %qE", name);
7810 : 181 : else if (storage_class == csc_register)
7811 : 1 : error_at (loc, "alignment specified for %<register%> object %qE",
7812 : : name);
7813 : 180 : else if (decl_context == PARM)
7814 : : {
7815 : 2 : if (name)
7816 : 1 : error_at (loc, "alignment specified for parameter %qE", name);
7817 : : else
7818 : 1 : error_at (loc, "alignment specified for unnamed parameter");
7819 : : }
7820 : 178 : else if (bitfield)
7821 : : {
7822 : 0 : if (name)
7823 : 0 : error_at (loc, "alignment specified for bit-field %qE", name);
7824 : : else
7825 : 0 : error_at (loc, "alignment specified for unnamed bit-field");
7826 : : }
7827 : 178 : else if (TREE_CODE (type) == FUNCTION_TYPE)
7828 : 1 : error_at (loc, "alignment specified for function %qE", name);
7829 : 177 : else if (declspecs->align_log != -1 && TYPE_P (type))
7830 : : {
7831 : 150 : alignas_align = 1U << declspecs->align_log;
7832 : 150 : if (alignas_align < min_align_of_type (type))
7833 : : {
7834 : 26 : if (name)
7835 : 25 : error_at (loc, "%<_Alignas%> specifiers cannot reduce "
7836 : : "alignment of %qE", name);
7837 : : else
7838 : 1 : error_at (loc, "%<_Alignas%> specifiers cannot reduce "
7839 : : "alignment of unnamed field");
7840 : : alignas_align = 0;
7841 : : }
7842 : : }
7843 : : }
7844 : :
7845 : : /* If this is declaring a typedef name, return a TYPE_DECL. */
7846 : :
7847 : 274434272 : if (storage_class == csc_typedef)
7848 : : {
7849 : 3993250 : tree decl;
7850 : 3993250 : if ((type_quals & TYPE_QUAL_ATOMIC)
7851 : 11148 : && TREE_CODE (type) == FUNCTION_TYPE)
7852 : : {
7853 : 0 : error_at (loc,
7854 : : "%<_Atomic%>-qualified function type");
7855 : 0 : type_quals &= ~TYPE_QUAL_ATOMIC;
7856 : : }
7857 : 3993250 : else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
7858 : 604 : && type_quals)
7859 : 0 : pedwarn (loc, OPT_Wpedantic,
7860 : : "ISO C forbids qualified function types");
7861 : 3992646 : if (type_quals)
7862 : 28752 : type = c_build_qualified_type (type, type_quals, orig_qual_type,
7863 : : orig_qual_indirect);
7864 : 7986500 : decl = build_decl (declarator->id_loc,
7865 : 3993250 : TYPE_DECL, declarator->u.id.id, type);
7866 : 3993250 : if (declspecs->explicit_signed_p)
7867 : 326705 : C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7868 : 3993250 : if (declspecs->inline_p)
7869 : 4 : pedwarn (loc, 0,"typedef %q+D declared %<inline%>", decl);
7870 : 3993250 : if (declspecs->noreturn_p)
7871 : 1 : pedwarn (loc, 0,"typedef %q+D declared %<_Noreturn%>", decl);
7872 : :
7873 : 3993250 : if (warn_cxx_compat && declarator->u.id.id != NULL_TREE)
7874 : : {
7875 : 1646 : struct c_binding *b = I_TAG_BINDING (declarator->u.id.id);
7876 : :
7877 : 1646 : if (b != NULL
7878 : 39 : && b->decl != NULL_TREE
7879 : 39 : && (B_IN_CURRENT_SCOPE (b)
7880 : 4 : || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b)))
7881 : 1681 : && TYPE_MAIN_VARIANT (b->decl) != TYPE_MAIN_VARIANT (type))
7882 : : {
7883 : 7 : auto_diagnostic_group d;
7884 : 7 : if (warning_at (declarator->id_loc, OPT_Wc___compat,
7885 : : ("using %qD as both a typedef and a tag is "
7886 : : "invalid in C++"), decl)
7887 : 7 : && b->locus != UNKNOWN_LOCATION)
7888 : 6 : inform (b->locus, "originally defined here");
7889 : 7 : }
7890 : : }
7891 : :
7892 : 3993250 : return decl;
7893 : : }
7894 : :
7895 : : /* If this is a type name (such as, in a cast or sizeof),
7896 : : compute the type and return it now. */
7897 : :
7898 : 270441022 : if (decl_context == TYPENAME)
7899 : : {
7900 : : /* Note that the grammar rejects storage classes in typenames
7901 : : and fields. */
7902 : 105194704 : gcc_assert (storage_class == csc_none && !threadp
7903 : : && !declspecs->inline_p && !declspecs->noreturn_p);
7904 : 105194704 : if ((type_quals & TYPE_QUAL_ATOMIC)
7905 : 184 : && TREE_CODE (type) == FUNCTION_TYPE)
7906 : : {
7907 : 0 : error_at (loc,
7908 : : "%<_Atomic%>-qualified function type");
7909 : 0 : type_quals &= ~TYPE_QUAL_ATOMIC;
7910 : : }
7911 : 105194704 : else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
7912 : 10 : && type_quals)
7913 : 0 : pedwarn (loc, OPT_Wpedantic,
7914 : : "ISO C forbids const or volatile function types");
7915 : 105194694 : if (type_quals)
7916 : 708 : type = c_build_qualified_type (type, type_quals, orig_qual_type,
7917 : : orig_qual_indirect);
7918 : 105194704 : return type;
7919 : : }
7920 : :
7921 : 346213 : if (pedantic && decl_context == FIELD
7922 : 165270179 : && c_type_variably_modified_p (type))
7923 : : {
7924 : : /* C99 6.7.2.1p8 */
7925 : 6 : pedwarn (loc, OPT_Wpedantic, "a member of a structure or union cannot "
7926 : : "have a variably modified type");
7927 : : }
7928 : :
7929 : : /* Aside from typedefs and type names (handle above),
7930 : : `void' at top level (not within pointer)
7931 : : is allowed only in public variables.
7932 : : We don't complain about parms either, but that is because
7933 : : a better error message can be made later. */
7934 : :
7935 : 165246318 : if (VOID_TYPE_P (type) && decl_context != PARM
7936 : 59 : && !((decl_context != FIELD && TREE_CODE (type) != FUNCTION_TYPE)
7937 : : && (storage_class == csc_extern
7938 : 27 : || (current_scope == file_scope
7939 : 18 : && !(storage_class == csc_static
7940 : : || storage_class == csc_register)))))
7941 : : {
7942 : 15 : error_at (loc, "variable or field %qE declared void", name);
7943 : 15 : type = integer_type_node;
7944 : : }
7945 : :
7946 : : /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7947 : : or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7948 : :
7949 : 164340851 : {
7950 : 164340851 : tree decl;
7951 : :
7952 : 164340851 : if (decl_context == PARM)
7953 : : {
7954 : 108508888 : tree promoted_type;
7955 : 108508888 : bool array_parameter_p = false;
7956 : :
7957 : : /* A parameter declared as an array of T is really a pointer to T.
7958 : : One declared as a function is really a pointer to a function. */
7959 : :
7960 : 108508888 : if (TREE_CODE (type) == ARRAY_TYPE)
7961 : : {
7962 : : /* Transfer const-ness of array into that of type pointed to. */
7963 : 416476 : type = TREE_TYPE (type);
7964 : 416476 : if (orig_qual_type != NULL_TREE)
7965 : : {
7966 : 7 : if (orig_qual_indirect == 0)
7967 : 5 : orig_qual_type = TREE_TYPE (orig_qual_type);
7968 : : else
7969 : 2 : orig_qual_indirect--;
7970 : : }
7971 : 416476 : if (type_quals)
7972 : 46865 : type = c_build_qualified_type (type, type_quals, orig_qual_type,
7973 : : orig_qual_indirect);
7974 : :
7975 : : /* The pointed-to type may need a decl expr (see above). */
7976 : 416476 : if (!TYPE_NAME (type) && c_type_variably_modified_p (type))
7977 : : {
7978 : 373 : bool bind_p = decl_context == TYPENAME
7979 : : || decl_context == FIELD
7980 : : || decl_context == PARM;
7981 : 373 : add_decl_expr (loc, type, bind_p ? expr : NULL, true);
7982 : : }
7983 : :
7984 : 416476 : type = c_build_pointer_type (type);
7985 : 416476 : type_quals = array_ptr_quals;
7986 : 416476 : if (type_quals)
7987 : 741 : type = c_build_qualified_type (type, type_quals);
7988 : :
7989 : : /* We don't yet implement attributes in this context. */
7990 : 416476 : if (array_ptr_attrs != NULL_TREE)
7991 : 0 : warning_at (loc, OPT_Wattributes,
7992 : : "attributes in parameter array declarator ignored");
7993 : :
7994 : : size_varies = false;
7995 : : array_parameter_p = true;
7996 : : }
7997 : 108092412 : else if (TREE_CODE (type) == FUNCTION_TYPE)
7998 : : {
7999 : 300 : if (type_quals & TYPE_QUAL_ATOMIC)
8000 : : {
8001 : 1 : error_at (loc,
8002 : : "%<_Atomic%>-qualified function type");
8003 : 1 : type_quals &= ~TYPE_QUAL_ATOMIC;
8004 : : }
8005 : 299 : else if (type_quals)
8006 : 0 : pedwarn (loc, OPT_Wpedantic,
8007 : : "ISO C forbids qualified function types");
8008 : 1 : if (type_quals)
8009 : 0 : type = c_build_qualified_type (type, type_quals);
8010 : 300 : type = c_build_pointer_type (type);
8011 : 300 : type_quals = TYPE_UNQUALIFIED;
8012 : : }
8013 : 108092112 : else if (type_quals)
8014 : 8636323 : type = c_build_qualified_type (type, type_quals);
8015 : :
8016 : 217017776 : decl = build_decl (declarator->id_loc,
8017 : 108508888 : PARM_DECL, declarator->u.id.id, type);
8018 : 108508888 : if (size_varies)
8019 : 42 : C_DECL_VARIABLE_SIZE (decl) = 1;
8020 : 108508888 : C_ARRAY_PARAMETER (decl) = array_parameter_p;
8021 : :
8022 : : /* Compute the type actually passed in the parmlist,
8023 : : for the case where there is no prototype.
8024 : : (For example, shorts and chars are passed as ints.)
8025 : : When there is a prototype, this is overridden later. */
8026 : :
8027 : 108508888 : if (type == error_mark_node)
8028 : : promoted_type = type;
8029 : : else
8030 : 108508807 : promoted_type = c_type_promotes_to (type);
8031 : :
8032 : 108508888 : DECL_ARG_TYPE (decl) = promoted_type;
8033 : 108508888 : if (declspecs->inline_p)
8034 : 4 : pedwarn (loc, 0, "parameter %q+D declared %<inline%>", decl);
8035 : 108508888 : if (declspecs->noreturn_p)
8036 : 1 : pedwarn (loc, 0, "parameter %q+D declared %<_Noreturn%>", decl);
8037 : : }
8038 : 56737430 : else if (decl_context == FIELD)
8039 : : {
8040 : : /* Note that the grammar rejects storage classes in typenames
8041 : : and fields. */
8042 : 3850147 : gcc_assert (storage_class == csc_none && !threadp
8043 : : && !declspecs->inline_p && !declspecs->noreturn_p);
8044 : :
8045 : : /* Structure field. It may not be a function. */
8046 : :
8047 : 3850147 : if (TREE_CODE (type) == FUNCTION_TYPE)
8048 : : {
8049 : 0 : error_at (loc, "field %qE declared as a function", name);
8050 : 0 : type = build_pointer_type (type);
8051 : : }
8052 : 3850147 : else if (TREE_CODE (type) != ERROR_MARK
8053 : 3850147 : && !COMPLETE_OR_UNBOUND_ARRAY_TYPE_P (type))
8054 : : {
8055 : 21 : if (name)
8056 : 14 : error_at (loc, "field %qE has incomplete type", name);
8057 : : else
8058 : 7 : error_at (loc, "unnamed field has incomplete type");
8059 : 21 : type = error_mark_node;
8060 : : }
8061 : 3850126 : else if (TREE_CODE (type) == ARRAY_TYPE
8062 : 3850126 : && TYPE_DOMAIN (type) == NULL_TREE)
8063 : : {
8064 : : /* We have a flexible array member through a typedef.
8065 : : Set suitable range. Whether this is a correct position
8066 : : for a flexible array member will be determined elsewhere. */
8067 : 14 : if (!in_system_header_at (input_location))
8068 : 14 : pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not "
8069 : : "support flexible array members");
8070 : 14 : type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type));
8071 : 14 : TYPE_DOMAIN (type) = build_range_type (sizetype, size_zero_node,
8072 : : NULL_TREE);
8073 : 14 : if (orig_qual_indirect == 0)
8074 : 3850147 : orig_qual_type = NULL_TREE;
8075 : : }
8076 : 3850147 : if (type != error_mark_node
8077 : 3850147 : && !verify_type_context (loc, TCTX_FIELD, type))
8078 : 0 : type = error_mark_node;
8079 : :
8080 : 3850147 : type = c_build_qualified_type (type, type_quals, orig_qual_type,
8081 : : orig_qual_indirect);
8082 : 7700294 : decl = build_decl (declarator->id_loc,
8083 : 3850147 : FIELD_DECL, declarator->u.id.id, type);
8084 : 3850147 : DECL_NONADDRESSABLE_P (decl) = bitfield;
8085 : 3850147 : if (bitfield && !declarator->u.id.id)
8086 : 8886 : DECL_PADDING_P (decl) = 1;
8087 : :
8088 : 3850147 : if (size_varies)
8089 : 613 : C_DECL_VARIABLE_SIZE (decl) = 1;
8090 : : }
8091 : 52887283 : else if (TREE_CODE (type) == FUNCTION_TYPE)
8092 : : {
8093 : 44191749 : if (storage_class == csc_register || threadp || constexprp)
8094 : : {
8095 : 10 : error_at (loc, "invalid storage class for function %qE", name);
8096 : : }
8097 : 44191739 : else if (current_scope != file_scope)
8098 : : {
8099 : : /* Function declaration not at file scope. Storage
8100 : : classes other than `extern' are not allowed, C99
8101 : : 6.7.1p5, and `extern' makes no difference. However,
8102 : : GCC allows 'auto', perhaps with 'inline', to support
8103 : : nested functions. */
8104 : 10452 : if (storage_class == csc_auto)
8105 : 63 : pedwarn (loc, OPT_Wpedantic,
8106 : : "invalid storage class for function %qE", name);
8107 : 10389 : else if (storage_class == csc_static)
8108 : : {
8109 : 19 : error_at (loc, "invalid storage class for function %qE", name);
8110 : 19 : if (funcdef_flag)
8111 : 8 : storage_class = declspecs->storage_class = csc_none;
8112 : : else
8113 : : return NULL_TREE;
8114 : : }
8115 : : }
8116 : :
8117 : 88383476 : decl = build_decl (declarator->id_loc,
8118 : 44191738 : FUNCTION_DECL, declarator->u.id.id, type);
8119 : 44191738 : decl = build_decl_attribute_variant (decl, decl_attr);
8120 : :
8121 : 44191738 : if (type_quals & TYPE_QUAL_ATOMIC)
8122 : : {
8123 : 1 : error_at (loc,
8124 : : "%<_Atomic%>-qualified function type");
8125 : 1 : type_quals &= ~TYPE_QUAL_ATOMIC;
8126 : : }
8127 : 44191737 : else if (pedantic && type_quals && !DECL_IN_SYSTEM_HEADER (decl))
8128 : 6 : pedwarn (loc, OPT_Wpedantic,
8129 : : "ISO C forbids qualified function types");
8130 : :
8131 : : /* Every function declaration is an external reference
8132 : : (DECL_EXTERNAL) except for those which are not at file
8133 : : scope and are explicitly declared "auto". This is
8134 : : forbidden by standard C (C99 6.7.1p5) and is interpreted by
8135 : : GCC to signify a forward declaration of a nested function. */
8136 : 44191738 : if (storage_class == csc_auto && current_scope != file_scope)
8137 : 63 : DECL_EXTERNAL (decl) = 0;
8138 : : /* In C99, a function which is declared 'inline' with 'extern'
8139 : : is not an external reference (which is confusing). It
8140 : : means that the later definition of the function must be output
8141 : : in this file, C99 6.7.4p6. In GNU C89, a function declared
8142 : : 'extern inline' is an external reference. */
8143 : 44191675 : else if (declspecs->inline_p && storage_class != csc_static)
8144 : 30955545 : DECL_EXTERNAL (decl) = ((storage_class == csc_extern)
8145 : 30955545 : == flag_gnu89_inline);
8146 : : else
8147 : 13236130 : DECL_EXTERNAL (decl) = !initialized;
8148 : :
8149 : : /* Record absence of global scope for `static' or `auto'. */
8150 : 44191738 : TREE_PUBLIC (decl)
8151 : 44191738 : = !(storage_class == csc_static || storage_class == csc_auto);
8152 : :
8153 : : /* For a function definition, record the argument information
8154 : : block where store_parm_decls will look for it. */
8155 : 44191738 : if (funcdef_flag)
8156 : 31761900 : current_function_arg_info = arg_info;
8157 : :
8158 : 44191738 : if (declspecs->default_int_p)
8159 : 9215 : C_FUNCTION_IMPLICIT_INT (decl) = 1;
8160 : :
8161 : : /* Record presence of `inline' and `_Noreturn', if it is
8162 : : reasonable. */
8163 : 44191738 : if (flag_hosted && MAIN_NAME_P (declarator->u.id.id))
8164 : : {
8165 : 47064 : if (declspecs->inline_p)
8166 : 5 : pedwarn (loc, 0, "cannot inline function %<main%>");
8167 : 47064 : if (declspecs->noreturn_p)
8168 : 1 : pedwarn (loc, 0, "%<main%> declared %<_Noreturn%>");
8169 : : }
8170 : : else
8171 : : {
8172 : 44144674 : if (declspecs->inline_p)
8173 : : /* Record that the function is declared `inline'. */
8174 : 31106398 : DECL_DECLARED_INLINE_P (decl) = 1;
8175 : 44144674 : if (declspecs->noreturn_p)
8176 : : {
8177 : 19819 : if (flag_isoc99)
8178 : 19816 : pedwarn_c99 (loc, OPT_Wpedantic,
8179 : : "ISO C99 does not support %<_Noreturn%>");
8180 : : else
8181 : 3 : pedwarn_c99 (loc, OPT_Wpedantic,
8182 : : "ISO C90 does not support %<_Noreturn%>");
8183 : 19819 : TREE_THIS_VOLATILE (decl) = 1;
8184 : : }
8185 : : }
8186 : :
8187 : : /* C99 6.2.2p7: It is invalid (compile-time undefined
8188 : : behavior) to create an 'extern' declaration for a
8189 : : function if there is a global declaration that is
8190 : : 'static' and the global declaration is not visible.
8191 : : (If the static declaration _is_ currently visible,
8192 : : the 'extern' declaration is taken to refer to that decl.) */
8193 : 44191738 : if (!initialized
8194 : 12429829 : && TREE_PUBLIC (decl)
8195 : 12418054 : && current_scope != file_scope)
8196 : : {
8197 : 8865 : tree global_decl = identifier_global_value (declarator->u.id.id);
8198 : 8865 : tree visible_decl = lookup_name (declarator->u.id.id);
8199 : :
8200 : 8865 : if (global_decl
8201 : 8865 : && global_decl != visible_decl
8202 : 1712 : && VAR_OR_FUNCTION_DECL_P (global_decl)
8203 : 1712 : && !TREE_PUBLIC (global_decl))
8204 : 1 : error_at (loc, "function previously declared %<static%> "
8205 : : "redeclared %<extern%>");
8206 : : }
8207 : : }
8208 : : else
8209 : : {
8210 : : /* It's a variable. */
8211 : : /* An uninitialized decl with `extern' is a reference. */
8212 : 8695534 : int extern_ref = !initialized && storage_class == csc_extern;
8213 : :
8214 : 8695534 : if (constexprp)
8215 : : {
8216 : : /* The type of a constexpr variable must not be variably
8217 : : modified, volatile, atomic or restrict qualified or
8218 : : have a member with such a qualifier. const
8219 : : qualification is implicitly added, and, at file scope,
8220 : : has internal linkage. */
8221 : 319 : if (c_type_variably_modified_p (type))
8222 : 1 : error_at (loc, "%<constexpr%> object has variably modified "
8223 : : "type");
8224 : 319 : if (type_quals
8225 : 319 : & (TYPE_QUAL_VOLATILE | TYPE_QUAL_RESTRICT | TYPE_QUAL_ATOMIC))
8226 : 9 : error_at (loc, "invalid qualifiers for %<constexpr%> object");
8227 : : else
8228 : : {
8229 : 310 : tree type_no_array = strip_array_types (type);
8230 : 310 : if (RECORD_OR_UNION_TYPE_P (type_no_array)
8231 : 310 : && C_TYPE_FIELDS_NON_CONSTEXPR (type_no_array))
8232 : 8 : error_at (loc, "invalid qualifiers for field of "
8233 : : "%<constexpr%> object");
8234 : : }
8235 : 319 : type_quals |= TYPE_QUAL_CONST;
8236 : 319 : if (current_scope == file_scope)
8237 : 281 : storage_class = csc_static;
8238 : : }
8239 : :
8240 : 8695534 : type = c_build_qualified_type (type, type_quals, orig_qual_type,
8241 : : orig_qual_indirect);
8242 : :
8243 : : /* C99 6.2.2p7: It is invalid (compile-time undefined
8244 : : behavior) to create an 'extern' declaration for a
8245 : : variable if there is a global declaration that is
8246 : : 'static' and the global declaration is not visible.
8247 : : (If the static declaration _is_ currently visible,
8248 : : the 'extern' declaration is taken to refer to that decl.) */
8249 : 8695534 : if (extern_ref && current_scope != file_scope)
8250 : : {
8251 : 1562 : tree global_decl = identifier_global_value (declarator->u.id.id);
8252 : 1562 : tree visible_decl = lookup_name (declarator->u.id.id);
8253 : :
8254 : 1562 : if (global_decl
8255 : 1562 : && global_decl != visible_decl
8256 : : && VAR_P (global_decl)
8257 : 281 : && !TREE_PUBLIC (global_decl))
8258 : 7 : error_at (loc, "variable previously declared %<static%> "
8259 : : "redeclared %<extern%>");
8260 : : }
8261 : :
8262 : 17391068 : decl = build_decl (declarator->id_loc,
8263 : 8695534 : VAR_DECL, declarator->u.id.id, type);
8264 : 8695534 : if (size_varies)
8265 : 7345 : C_DECL_VARIABLE_SIZE (decl) = 1;
8266 : 8695534 : if (constexprp)
8267 : 319 : C_DECL_DECLARED_CONSTEXPR (decl) = 1;
8268 : :
8269 : 8695534 : if (declspecs->inline_p)
8270 : 4 : pedwarn (loc, 0, "variable %q+D declared %<inline%>", decl);
8271 : 8695534 : if (declspecs->noreturn_p)
8272 : 1 : pedwarn (loc, 0, "variable %q+D declared %<_Noreturn%>", decl);
8273 : :
8274 : : /* At file scope, an initialized extern declaration may follow
8275 : : a static declaration. In that case, DECL_EXTERNAL will be
8276 : : reset later in start_decl. */
8277 : 8695534 : DECL_EXTERNAL (decl) = (storage_class == csc_extern);
8278 : :
8279 : : /* At file scope, the presence of a `static' or `register' storage
8280 : : class specifier, or the absence of all storage class specifiers
8281 : : makes this declaration a definition (perhaps tentative). Also,
8282 : : the absence of `static' makes it public. */
8283 : 8695534 : if (current_scope == file_scope)
8284 : : {
8285 : 1137120 : TREE_PUBLIC (decl) = storage_class != csc_static;
8286 : 1137120 : TREE_STATIC (decl) = !extern_ref;
8287 : : }
8288 : : /* Not at file scope, only `static' makes a static definition. */
8289 : : else
8290 : : {
8291 : 7558414 : TREE_STATIC (decl) = (storage_class == csc_static);
8292 : 7558414 : TREE_PUBLIC (decl) = extern_ref;
8293 : : }
8294 : :
8295 : 8695534 : if (threadp)
8296 : 2784 : set_decl_tls_model (decl, decl_default_tls_model (decl));
8297 : : }
8298 : :
8299 : 165246307 : if ((storage_class == csc_extern
8300 : 121983947 : || (storage_class == csc_none
8301 : 121540953 : && TREE_CODE (type) == FUNCTION_TYPE
8302 : 752871 : && !funcdef_flag))
8303 : 165525148 : && c_type_variably_modified_p (type))
8304 : : {
8305 : : /* C99 6.7.5.2p2 */
8306 : 6 : if (TREE_CODE (type) == FUNCTION_TYPE)
8307 : 4 : error_at (loc, "non-nested function with variably modified type");
8308 : : else
8309 : 2 : error_at (loc, "object with variably modified type must have "
8310 : : "no linkage");
8311 : : }
8312 : :
8313 : : /* For nested functions disqualify ones taking VLAs by value
8314 : : from inlining since the middle-end cannot deal with this.
8315 : : ??? We should arrange for those to be passed by reference
8316 : : with emitting the copy on the caller side in the frontend. */
8317 : 165246307 : if (storage_class == csc_none
8318 : 121540953 : && TREE_CODE (type) == FUNCTION_TYPE)
8319 : 3883848 : for (tree al = TYPE_ARG_TYPES (type); al; al = TREE_CHAIN (al))
8320 : : {
8321 : 3131017 : tree arg = TREE_VALUE (al);
8322 : 3131017 : if (arg != error_mark_node
8323 : 3131017 : && C_TYPE_VARIABLE_SIZE (arg))
8324 : : {
8325 : 40 : DECL_UNINLINABLE (decl) = 1;
8326 : 40 : break;
8327 : : }
8328 : : }
8329 : :
8330 : : /* Record `register' declaration for warnings on &
8331 : : and in case doing stupid register allocation. */
8332 : :
8333 : 165246307 : if (storage_class == csc_register)
8334 : : {
8335 : 3533 : C_DECL_REGISTER (decl) = 1;
8336 : 3533 : DECL_REGISTER (decl) = 1;
8337 : : }
8338 : :
8339 : : /* Record constancy and volatility. */
8340 : 165246307 : c_apply_type_quals_to_decl (type_quals, decl);
8341 : :
8342 : : /* Apply _Alignas specifiers. */
8343 : 165246307 : if (alignas_align)
8344 : : {
8345 : 117 : SET_DECL_ALIGN (decl, alignas_align * BITS_PER_UNIT);
8346 : 117 : DECL_USER_ALIGN (decl) = 1;
8347 : : }
8348 : :
8349 : : /* If a type has volatile components, it should be stored in memory.
8350 : : Otherwise, the fact that those components are volatile
8351 : : will be ignored, and would even crash the compiler.
8352 : : Of course, this only makes sense on VAR,PARM, and RESULT decl's. */
8353 : 165246307 : if (C_TYPE_FIELDS_VOLATILE (TREE_TYPE (decl))
8354 : 165246307 : && (VAR_P (decl) || TREE_CODE (decl) == PARM_DECL
8355 : : || TREE_CODE (decl) == RESULT_DECL))
8356 : : {
8357 : : /* It is not an error for a structure with volatile fields to
8358 : : be declared register, but reset DECL_REGISTER since it
8359 : : cannot actually go in a register. */
8360 : 154 : int was_reg = C_DECL_REGISTER (decl);
8361 : 154 : C_DECL_REGISTER (decl) = 0;
8362 : 154 : DECL_REGISTER (decl) = 0;
8363 : 154 : c_mark_addressable (decl);
8364 : 154 : C_DECL_REGISTER (decl) = was_reg;
8365 : : }
8366 : :
8367 : : /* This is the earliest point at which we might know the assembler
8368 : : name of a variable. Thus, if it's known before this, die horribly. */
8369 : 165246307 : gcc_assert (!HAS_DECL_ASSEMBLER_NAME_P (decl)
8370 : : || !DECL_ASSEMBLER_NAME_SET_P (decl));
8371 : :
8372 : 165246307 : if (warn_cxx_compat
8373 : : && VAR_P (decl)
8374 : : && TREE_PUBLIC (decl)
8375 : 21142 : && TREE_STATIC (decl)
8376 : 2003 : && (RECORD_OR_UNION_TYPE_P (TREE_TYPE (decl))
8377 : 1915 : || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
8378 : 165246410 : && TYPE_NAME (TREE_TYPE (decl)) == NULL_TREE)
8379 : 4 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat,
8380 : : ("non-local variable %qD with anonymous type is "
8381 : : "questionable in C++"),
8382 : : decl);
8383 : :
8384 : : return decl;
8385 : : }
8386 : : }
8387 : :
8388 : : /* Decode the parameter-list info for a function type or function definition.
8389 : : The argument is the value returned by `get_parm_info' (or made in c-parse.c
8390 : : if there is an identifier list instead of a parameter decl list).
8391 : : These two functions are separate because when a function returns
8392 : : or receives functions then each is called multiple times but the order
8393 : : of calls is different. The last call to `grokparms' is always the one
8394 : : that contains the formal parameter names of a function definition.
8395 : :
8396 : : Return a list of arg types to use in the FUNCTION_TYPE for this function.
8397 : :
8398 : : FUNCDEF_FLAG is true for a function definition, false for
8399 : : a mere declaration. A nonempty identifier-list gets an error message
8400 : : when FUNCDEF_FLAG is false. */
8401 : :
8402 : : static tree
8403 : 43842178 : grokparms (struct c_arg_info *arg_info, bool funcdef_flag)
8404 : : {
8405 : 43842178 : tree arg_types = arg_info->types;
8406 : :
8407 : 43842178 : if (funcdef_flag && arg_info->had_vla_unspec)
8408 : : {
8409 : : /* A function definition isn't function prototype scope C99 6.2.1p4. */
8410 : : /* C99 6.7.5.2p4 */
8411 : 2 : error ("%<[*]%> not allowed in other than function prototype scope");
8412 : : }
8413 : :
8414 : 714879 : if (arg_types == NULL_TREE && !funcdef_flag && !flag_isoc23
8415 : 44556942 : && !in_system_header_at (input_location))
8416 : 714761 : warning (OPT_Wstrict_prototypes,
8417 : : "function declaration isn%'t a prototype");
8418 : :
8419 : 43842178 : if (arg_types == error_mark_node)
8420 : : /* Don't set TYPE_ARG_TYPES in this case. */
8421 : : return NULL_TREE;
8422 : :
8423 : 86916444 : else if (arg_types && TREE_CODE (TREE_VALUE (arg_types)) == IDENTIFIER_NODE)
8424 : : {
8425 : 8691 : if (!funcdef_flag)
8426 : : {
8427 : 11 : permerror_opt (input_location,
8428 : : OPT_Wdeclaration_missing_parameter_type,
8429 : : "parameter names (without types) in "
8430 : : "function declaration");
8431 : 11 : arg_info->parms = NULL_TREE;
8432 : : }
8433 : : else
8434 : 8680 : arg_info->parms = arg_info->types;
8435 : :
8436 : 8691 : arg_info->types = NULL_TREE;
8437 : 8691 : return NULL_TREE;
8438 : : }
8439 : : else
8440 : : {
8441 : 43833487 : tree parm, type, typelt;
8442 : 43833487 : unsigned int parmno;
8443 : :
8444 : : /* In C23, convert () to (void). */
8445 : 43833487 : if (flag_isoc23
8446 : 12503 : && !arg_types
8447 : 704 : && !arg_info->parms
8448 : 704 : && !arg_info->no_named_args_stdarg_p)
8449 : 612 : arg_types = arg_info->types = void_list_node;
8450 : :
8451 : : /* If there is a parameter of incomplete type in a definition,
8452 : : this is an error. In a declaration this is valid, and a
8453 : : struct or union type may be completed later, before any calls
8454 : : or definition of the function. In the case where the tag was
8455 : : first declared within the parameter list, a warning has
8456 : : already been given. If a parameter has void type, then
8457 : : however the function cannot be defined or called, so
8458 : : warn. */
8459 : :
8460 : 43833487 : for (parm = arg_info->parms, typelt = arg_types, parmno = 1;
8461 : 151414053 : parm;
8462 : 107580566 : parm = DECL_CHAIN (parm), typelt = TREE_CHAIN (typelt), parmno++)
8463 : : {
8464 : 107580566 : type = TREE_VALUE (typelt);
8465 : 107580566 : if (type == error_mark_node)
8466 : 58 : continue;
8467 : :
8468 : 107580508 : if (!COMPLETE_TYPE_P (type))
8469 : : {
8470 : 55 : if (funcdef_flag)
8471 : : {
8472 : 27 : if (DECL_NAME (parm))
8473 : 27 : error_at (input_location,
8474 : : "parameter %u (%q+D) has incomplete type",
8475 : : parmno, parm);
8476 : : else
8477 : 0 : error_at (DECL_SOURCE_LOCATION (parm),
8478 : : "parameter %u has incomplete type",
8479 : : parmno);
8480 : :
8481 : 27 : TREE_VALUE (typelt) = error_mark_node;
8482 : 27 : TREE_TYPE (parm) = error_mark_node;
8483 : 27 : arg_types = NULL_TREE;
8484 : : }
8485 : 28 : else if (VOID_TYPE_P (type))
8486 : : {
8487 : 2 : if (DECL_NAME (parm))
8488 : 2 : warning_at (input_location, 0,
8489 : : "parameter %u (%q+D) has void type",
8490 : : parmno, parm);
8491 : : else
8492 : 0 : warning_at (DECL_SOURCE_LOCATION (parm), 0,
8493 : : "parameter %u has void type",
8494 : : parmno);
8495 : : }
8496 : : }
8497 : :
8498 : 107580508 : if (DECL_NAME (parm) && TREE_USED (parm))
8499 : 17406 : warn_if_shadowing (parm);
8500 : : }
8501 : 43833487 : return arg_types;
8502 : : }
8503 : : }
8504 : :
8505 : : /* Allocate and initialize a c_arg_info structure from the parser's
8506 : : obstack. */
8507 : :
8508 : : struct c_arg_info *
8509 : 43842191 : build_arg_info (void)
8510 : : {
8511 : 43842191 : struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info);
8512 : 43842191 : ret->parms = NULL_TREE;
8513 : 43842191 : ret->tags = NULL;
8514 : 43842191 : ret->types = NULL_TREE;
8515 : 43842191 : ret->others = NULL_TREE;
8516 : 43842191 : ret->pending_sizes = NULL;
8517 : 43842191 : ret->had_vla_unspec = 0;
8518 : 43842191 : ret->no_named_args_stdarg_p = 0;
8519 : 43842191 : return ret;
8520 : : }
8521 : :
8522 : : /* Take apart the current scope and return a c_arg_info structure with
8523 : : info on a parameter list just parsed.
8524 : :
8525 : : This structure is later fed to 'grokparms' and 'store_parm_decls'.
8526 : :
8527 : : ELLIPSIS being true means the argument list ended in '...' so don't
8528 : : append a sentinel (void_list_node) to the end of the type-list.
8529 : :
8530 : : EXPR is NULL or an expression that needs to be evaluated for the
8531 : : side effects of array size expressions in the parameters. */
8532 : :
8533 : : struct c_arg_info *
8534 : 43065577 : get_parm_info (bool ellipsis, tree expr)
8535 : : {
8536 : 43065577 : struct c_binding *b = current_scope->bindings;
8537 : 43065577 : struct c_arg_info *arg_info = build_arg_info ();
8538 : :
8539 : 43065577 : tree parms = NULL_TREE;
8540 : 43065577 : vec<c_arg_tag, va_gc> *tags = NULL;
8541 : 43065577 : tree types = NULL_TREE;
8542 : 43065577 : tree others = NULL_TREE;
8543 : :
8544 : 43065577 : bool gave_void_only_once_err = false;
8545 : :
8546 : 43065577 : arg_info->had_vla_unspec = current_scope->had_vla_unspec;
8547 : :
8548 : : /* The bindings in this scope must not get put into a block.
8549 : : We will take care of deleting the binding nodes. */
8550 : 43065577 : current_scope->bindings = 0;
8551 : :
8552 : : /* This function is only called if there was *something* on the
8553 : : parameter list. */
8554 : 43065577 : gcc_assert (b);
8555 : :
8556 : : /* A parameter list consisting solely of 'void' indicates that the
8557 : : function takes no arguments. But if the 'void' is qualified
8558 : : (by 'const' or 'volatile'), or has a storage class specifier
8559 : : ('register'), then the behavior is undefined; issue an error.
8560 : : Typedefs for 'void' are OK (see DR#157). */
8561 : 43065577 : if (b->prev == 0 /* one binding */
8562 : 11044680 : && TREE_CODE (b->decl) == PARM_DECL /* which is a parameter */
8563 : 11044680 : && !DECL_NAME (b->decl) /* anonymous */
8564 : 44732154 : && VOID_TYPE_P (TREE_TYPE (b->decl))) /* of void type */
8565 : : {
8566 : 905449 : if (TYPE_QUALS (TREE_TYPE (b->decl)) != TYPE_UNQUALIFIED
8567 : 905449 : || C_DECL_REGISTER (b->decl))
8568 : 72 : error_at (b->locus, "%<void%> as only parameter may not be qualified");
8569 : :
8570 : : /* There cannot be an ellipsis. */
8571 : 905449 : if (ellipsis)
8572 : 1 : error_at (b->locus, "%<void%> must be the only parameter");
8573 : :
8574 : 905449 : arg_info->types = void_list_node;
8575 : 905449 : return arg_info;
8576 : : }
8577 : :
8578 : 42160128 : if (!ellipsis)
8579 : 41958609 : types = void_list_node;
8580 : :
8581 : : /* Break up the bindings list into parms, tags, types, and others;
8582 : : apply sanity checks; purge the name-to-decl bindings. */
8583 : 149741015 : while (b)
8584 : : {
8585 : 107580887 : tree decl = b->decl;
8586 : 107580887 : tree type = TREE_TYPE (decl);
8587 : 107580887 : c_arg_tag tag;
8588 : 107580887 : const char *keyword;
8589 : :
8590 : 107580887 : switch (TREE_CODE (decl))
8591 : : {
8592 : 107580573 : case PARM_DECL:
8593 : 107580573 : if (b->id)
8594 : : {
8595 : 104416441 : gcc_assert (I_SYMBOL_BINDING (b->id) == b);
8596 : 104416441 : I_SYMBOL_BINDING (b->id) = b->shadowed;
8597 : : }
8598 : :
8599 : : /* Check for forward decls that never got their actual decl. */
8600 : 107580573 : if (TREE_ASM_WRITTEN (decl))
8601 : 4 : error_at (b->locus,
8602 : : "parameter %q+D has just a forward declaration", decl);
8603 : : /* Check for (..., void, ...) and issue an error. */
8604 : 107580569 : else if (VOID_TYPE_P (type) && !DECL_NAME (decl))
8605 : : {
8606 : 2 : if (!gave_void_only_once_err)
8607 : : {
8608 : 2 : error_at (b->locus, "%<void%> must be the only parameter");
8609 : 2 : gave_void_only_once_err = true;
8610 : : }
8611 : : }
8612 : : else
8613 : : {
8614 : : /* Valid parameter, add it to the list. */
8615 : 107580567 : DECL_CHAIN (decl) = parms;
8616 : 107580567 : parms = decl;
8617 : :
8618 : : /* Since there is a prototype, args are passed in their
8619 : : declared types. The back end may override this later. */
8620 : 107580567 : DECL_ARG_TYPE (decl) = type;
8621 : 107580567 : types = tree_cons (0, type, types);
8622 : : }
8623 : : break;
8624 : :
8625 : 21 : case ENUMERAL_TYPE: keyword = "enum"; goto tag;
8626 : 19 : case UNION_TYPE: keyword = "union"; goto tag;
8627 : 89 : case RECORD_TYPE: keyword = "struct"; goto tag;
8628 : 129 : tag:
8629 : : /* Types may not have tag-names, in which case the type
8630 : : appears in the bindings list with b->id NULL. */
8631 : 129 : if (b->id)
8632 : : {
8633 : 89 : gcc_assert (I_TAG_BINDING (b->id) == b);
8634 : 89 : I_TAG_BINDING (b->id) = b->shadowed;
8635 : : }
8636 : :
8637 : : /* Warn about any struct, union or enum tags defined in a
8638 : : parameter list. The scope of such types is limited to
8639 : : the parameter list, which is rarely if ever desirable
8640 : : (it's impossible to call such a function with type-
8641 : : correct arguments). An anonymous union parm type is
8642 : : meaningful as a GNU extension, so don't warn for that. */
8643 : 129 : if (TREE_CODE (decl) != UNION_TYPE || b->id != NULL_TREE)
8644 : : {
8645 : 110 : if (b->id)
8646 : : {
8647 : : /* The %s will be one of 'struct', 'union', or 'enum'. */
8648 : 89 : if (!flag_isoc23)
8649 : 78 : warning_at (b->locus, 0,
8650 : : "%<%s %E%> declared inside parameter list"
8651 : : " will not be visible outside of this definition or"
8652 : : " declaration", keyword, b->id);
8653 : : }
8654 : : else
8655 : : /* The %s will be one of 'struct', 'union', or 'enum'. */
8656 : 21 : warning_at (b->locus, 0,
8657 : : "anonymous %s declared inside parameter list"
8658 : : " will not be visible outside of this definition or"
8659 : : " declaration", keyword);
8660 : : }
8661 : :
8662 : 129 : tag.id = b->id;
8663 : 129 : tag.type = decl;
8664 : 129 : vec_safe_push (tags, tag);
8665 : 129 : break;
8666 : :
8667 : 20 : case FUNCTION_DECL:
8668 : : /* FUNCTION_DECLs appear when there is an implicit function
8669 : : declaration in the parameter list. */
8670 : 20 : gcc_assert (b->nested || seen_error ());
8671 : 20 : goto set_shadowed;
8672 : :
8673 : 131 : case CONST_DECL:
8674 : 131 : case TYPE_DECL:
8675 : : /* CONST_DECLs appear here when we have an embedded enum,
8676 : : and TYPE_DECLs appear here when we have an embedded struct
8677 : : or union. No warnings for this - we already warned about the
8678 : : type itself. */
8679 : :
8680 : : /* When we reinsert this decl in the function body, we need
8681 : : to reconstruct whether it was marked as nested. */
8682 : 131 : gcc_assert (!b->nested);
8683 : 131 : DECL_CHAIN (decl) = others;
8684 : 131 : others = decl;
8685 : : /* fall through */
8686 : :
8687 : 185 : case ERROR_MARK:
8688 : 185 : set_shadowed:
8689 : : /* error_mark_node appears here when we have an undeclared
8690 : : variable. Just throw it away. */
8691 : 185 : if (b->id)
8692 : : {
8693 : 56 : gcc_assert (I_SYMBOL_BINDING (b->id) == b);
8694 : 56 : I_SYMBOL_BINDING (b->id) = b->shadowed;
8695 : : }
8696 : : break;
8697 : :
8698 : : /* Other things that might be encountered. */
8699 : 0 : case LABEL_DECL:
8700 : 0 : case VAR_DECL:
8701 : 0 : default:
8702 : 0 : gcc_unreachable ();
8703 : : }
8704 : :
8705 : 107580887 : b = free_binding_and_advance (b);
8706 : : }
8707 : :
8708 : 42160128 : arg_info->parms = parms;
8709 : 42160128 : arg_info->tags = tags;
8710 : 42160128 : arg_info->types = types;
8711 : 42160128 : arg_info->others = others;
8712 : 42160128 : arg_info->pending_sizes = expr;
8713 : 42160128 : arg_info->no_named_args_stdarg_p = ellipsis && !types;
8714 : 42160128 : return arg_info;
8715 : : }
8716 : :
8717 : : /* Get the struct, enum or union (CODE says which) with tag NAME.
8718 : : Define the tag as a forward-reference with location LOC if it is
8719 : : not defined. HAVE_STD_ATTRS says whether any standard attributes
8720 : : were present after the struct, union or enum keyword; ATTRS are the
8721 : : standard attributes present there. HAS_ENUM_TYPE_SPECIFIER says
8722 : : whether an enum type specifier (": specifier-qualifier-list") is
8723 : : present; if so, this is called before that specifier is parsed, so
8724 : : that the tag is in scope for that specifier. Return a c_typespec
8725 : : structure for the type specifier. */
8726 : :
8727 : : struct c_typespec
8728 : 1008891 : parser_xref_tag (location_t loc, enum tree_code code, tree name,
8729 : : bool have_std_attrs, tree attrs, bool has_enum_type_specifier)
8730 : : {
8731 : 1008891 : struct c_typespec ret;
8732 : 1008891 : tree ref;
8733 : 1008891 : location_t refloc;
8734 : :
8735 : 1008891 : ret.expr = NULL_TREE;
8736 : 1008891 : ret.expr_const_operands = true;
8737 : 1008891 : ret.has_enum_type_specifier = has_enum_type_specifier;
8738 : :
8739 : : /* If a cross reference is requested, look up the type already
8740 : : defined for this tag and return it. If an enum type specifier is
8741 : : present, only a definition in the current scope is relevant. */
8742 : :
8743 : 1008891 : ref = lookup_tag (code, name, has_enum_type_specifier, &refloc);
8744 : :
8745 : : /* If the visble type is still being defined, see if there is
8746 : : an earlier definition (which may be complete). We do not
8747 : : have to loop because nested redefinitions are not allowed. */
8748 : 1008891 : if (flag_isoc23 && ref && C_TYPE_BEING_DEFINED (ref))
8749 : : {
8750 : 28 : tree vis = previous_tag (ref);
8751 : 28 : if (vis)
8752 : 9 : ref = vis;
8753 : : }
8754 : :
8755 : : /* If this is the right type of tag, return what we found.
8756 : : (This reference will be shadowed by shadow_tag later if appropriate.)
8757 : : If this is the wrong type of tag, do not return it. If it was the
8758 : : wrong type in the same scope, we will have had an error
8759 : : message already; if in a different scope and declaring
8760 : : a name, pending_xref_error will give an error message; but if in a
8761 : : different scope and not declaring a name, this tag should
8762 : : shadow the previous declaration of a different type of tag, and
8763 : : this would not work properly if we return the reference found.
8764 : : (For example, with "struct foo" in an outer scope, "union foo;"
8765 : : must shadow that tag with a new one of union type.) */
8766 : 2017782 : ret.kind = (ref
8767 : 1008891 : ? (have_std_attrs ? ctsk_tagref_attrs : ctsk_tagref)
8768 : 86560 : : (have_std_attrs ? ctsk_tagfirstref_attrs : ctsk_tagfirstref));
8769 : 1008891 : if (ref && TREE_CODE (ref) == code)
8770 : : {
8771 : 922297 : decl_attributes (&ref, attrs, (int) ATTR_FLAG_TYPE_IN_PLACE);
8772 : 922297 : if (C_TYPE_DEFINED_IN_STRUCT (ref)
8773 : 5 : && loc != UNKNOWN_LOCATION
8774 : 922302 : && warn_cxx_compat)
8775 : : {
8776 : 5 : auto_diagnostic_group d;
8777 : 5 : switch (code)
8778 : : {
8779 : 2 : case ENUMERAL_TYPE:
8780 : 2 : if (warning_at (loc, OPT_Wc___compat,
8781 : : ("enum type defined in struct or union "
8782 : : "is not visible in C++")))
8783 : 2 : inform (refloc, "enum type defined here");
8784 : : break;
8785 : 2 : case RECORD_TYPE:
8786 : 2 : if (warning_at (loc, OPT_Wc___compat,
8787 : : ("struct defined in struct or union "
8788 : : "is not visible in C++")))
8789 : 2 : inform (refloc, "struct defined here");
8790 : : break;
8791 : 1 : case UNION_TYPE:
8792 : 1 : if (warning_at (loc, OPT_Wc___compat,
8793 : : ("union defined in struct or union "
8794 : : "is not visible in C++")))
8795 : 1 : inform (refloc, "union defined here");
8796 : : break;
8797 : 0 : default:
8798 : 0 : gcc_unreachable();
8799 : : }
8800 : 5 : }
8801 : :
8802 : 922297 : ret.spec = ref;
8803 : 922297 : return ret;
8804 : : }
8805 : :
8806 : : /* If no such tag is yet defined, create a forward-reference node
8807 : : and record it as the "definition".
8808 : : When a real declaration of this type is found,
8809 : : the forward-reference will be altered into a real type. */
8810 : :
8811 : 86594 : ref = make_node (code);
8812 : 86594 : if (code == ENUMERAL_TYPE)
8813 : : {
8814 : : /* Give the type a default layout like unsigned int
8815 : : to avoid crashing if it does not get defined. */
8816 : 237 : SET_TYPE_MODE (ref, TYPE_MODE (unsigned_type_node));
8817 : 237 : SET_TYPE_ALIGN (ref, TYPE_ALIGN (unsigned_type_node));
8818 : 237 : TYPE_USER_ALIGN (ref) = 0;
8819 : 237 : TYPE_UNSIGNED (ref) = 1;
8820 : 237 : TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node);
8821 : 237 : TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node);
8822 : 237 : TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node);
8823 : 237 : ENUM_FIXED_UNDERLYING_TYPE_P (ref) = has_enum_type_specifier;
8824 : : }
8825 : :
8826 : 86594 : pushtag (loc, name, ref);
8827 : 86594 : decl_attributes (&ref, attrs, (int) ATTR_FLAG_TYPE_IN_PLACE);
8828 : 86594 : if (in_underspecified_init)
8829 : 9 : error_at (loc, "%qT declared in underspecified object initializer",
8830 : : ref);
8831 : :
8832 : 86594 : ret.spec = ref;
8833 : 86594 : return ret;
8834 : : }
8835 : :
8836 : : /* Get the struct, enum or union (CODE says which) with tag NAME.
8837 : : Define the tag as a forward-reference if it is not defined.
8838 : : Return a tree for the type. */
8839 : :
8840 : : tree
8841 : 0 : xref_tag (enum tree_code code, tree name)
8842 : : {
8843 : 0 : return parser_xref_tag (input_location, code, name, false, NULL_TREE,
8844 : 0 : false).spec;
8845 : : }
8846 : :
8847 : : /* Make sure that the tag NAME is defined *in the current scope*
8848 : : at least as a forward reference.
8849 : : LOC is the location of the struct's definition.
8850 : : CODE says which kind of tag NAME ought to be.
8851 : :
8852 : : This stores the current value of the file static STRUCT_PARSE_INFO
8853 : : in *ENCLOSING_STRUCT_PARSE_INFO, and points STRUCT_PARSE_INFO at a
8854 : : new c_struct_parse_info structure. The old value of
8855 : : STRUCT_PARSE_INFO is restored in finish_struct. */
8856 : :
8857 : : tree
8858 : 1072866 : start_struct (location_t loc, enum tree_code code, tree name,
8859 : : class c_struct_parse_info **enclosing_struct_parse_info)
8860 : : {
8861 : : /* If there is already a tag defined at this scope
8862 : : (as a forward reference), just return it. */
8863 : :
8864 : 1072866 : tree ref = NULL_TREE;
8865 : 1072866 : location_t refloc = UNKNOWN_LOCATION;
8866 : :
8867 : 1072866 : if (name != NULL_TREE)
8868 : 458940 : ref = lookup_tag (code, name, true, &refloc);
8869 : :
8870 : : /* For C23, even if we already have a completed definition,
8871 : : we do not use it. We will check for consistency later.
8872 : : If we are in a nested redefinition the type is not
8873 : : complete. We will then detect this below. */
8874 : 1072866 : if (flag_isoc23 && ref && TYPE_SIZE (ref))
8875 : : ref = NULL_TREE;
8876 : :
8877 : 1072813 : if (ref && TREE_CODE (ref) == code)
8878 : : {
8879 : 24061 : if (TYPE_STUB_DECL (ref))
8880 : 24061 : refloc = DECL_SOURCE_LOCATION (TYPE_STUB_DECL (ref));
8881 : :
8882 : 24061 : if (TYPE_SIZE (ref))
8883 : : {
8884 : 10 : auto_diagnostic_group d;
8885 : 10 : if (code == UNION_TYPE)
8886 : 2 : error_at (loc, "redefinition of %<union %E%>", name);
8887 : : else
8888 : 8 : error_at (loc, "redefinition of %<struct %E%>", name);
8889 : 10 : if (refloc != UNKNOWN_LOCATION)
8890 : 10 : inform (refloc, "originally defined here");
8891 : : /* Don't create structures using a name already in use. */
8892 : 10 : ref = NULL_TREE;
8893 : 10 : }
8894 : 24051 : else if (C_TYPE_BEING_DEFINED (ref))
8895 : : {
8896 : 14 : if (code == UNION_TYPE)
8897 : 1 : error_at (loc, "nested redefinition of %<union %E%>", name);
8898 : : else
8899 : 13 : error_at (loc, "nested redefinition of %<struct %E%>", name);
8900 : : /* Don't bother to report "originally defined here" for a
8901 : : nested redefinition; the original definition should be
8902 : : obvious. */
8903 : : /* Don't create structures that contain themselves. */
8904 : : ref = NULL_TREE;
8905 : : }
8906 : : }
8907 : :
8908 : : /* Otherwise create a forward-reference just so the tag is in scope. */
8909 : :
8910 : 24050 : if (ref == NULL_TREE || TREE_CODE (ref) != code)
8911 : : {
8912 : 1048829 : ref = make_node (code);
8913 : 1048829 : pushtag (loc, name, ref);
8914 : : }
8915 : :
8916 : 1072866 : C_TYPE_BEING_DEFINED (ref) = 1;
8917 : 2174724 : for (tree v = TYPE_MAIN_VARIANT (ref); v; v = TYPE_NEXT_VARIANT (v))
8918 : 1101858 : TYPE_PACKED (v) = flag_pack_struct;
8919 : :
8920 : 1072866 : *enclosing_struct_parse_info = struct_parse_info;
8921 : 1072866 : struct_parse_info = new c_struct_parse_info ();
8922 : :
8923 : : /* FIXME: This will issue a warning for a use of a type defined
8924 : : within a statement expr used within sizeof, et. al. This is not
8925 : : terribly serious as C++ doesn't permit statement exprs within
8926 : : sizeof anyhow. */
8927 : 1072866 : if (warn_cxx_compat && (in_sizeof || in_typeof || in_alignof))
8928 : 10 : warning_at (loc, OPT_Wc___compat,
8929 : : "defining type in %qs expression is invalid in C++",
8930 : : (in_sizeof
8931 : : ? "sizeof"
8932 : 4 : : (in_typeof ? "typeof" : "alignof")));
8933 : :
8934 : 1072866 : if (in_underspecified_init)
8935 : 18 : error_at (loc, "%qT defined in underspecified object initializer", ref);
8936 : :
8937 : 1072866 : return ref;
8938 : : }
8939 : :
8940 : : /* Process the specs, declarator and width (NULL if omitted)
8941 : : of a structure component, returning a FIELD_DECL node.
8942 : : WIDTH is non-NULL for bit-fields only, and is an INTEGER_CST node.
8943 : : DECL_ATTRS is as for grokdeclarator.
8944 : :
8945 : : LOC is the location of the structure component.
8946 : :
8947 : : This is done during the parsing of the struct declaration.
8948 : : The FIELD_DECL nodes are chained together and the lot of them
8949 : : are ultimately passed to `build_struct' to make the RECORD_TYPE node. */
8950 : :
8951 : : tree
8952 : 3850174 : grokfield (location_t loc,
8953 : : struct c_declarator *declarator, struct c_declspecs *declspecs,
8954 : : tree width, tree *decl_attrs, tree *expr)
8955 : : {
8956 : 3850174 : tree value;
8957 : :
8958 : 3850174 : if (declarator->kind == cdk_id && declarator->u.id.id == NULL_TREE
8959 : 18971 : && width == NULL_TREE)
8960 : : {
8961 : : /* This is an unnamed decl.
8962 : :
8963 : : If we have something of the form "union { list } ;" then this
8964 : : is the anonymous union extension. Similarly for struct.
8965 : :
8966 : : If this is something of the form "struct foo;", then
8967 : : If MS or Plan 9 extensions are enabled, this is handled as
8968 : : an anonymous struct.
8969 : : Otherwise this is a forward declaration of a structure tag.
8970 : :
8971 : : If this is something of the form "foo;" and foo is a TYPE_DECL, then
8972 : : If foo names a structure or union without a tag, then this
8973 : : is an anonymous struct (this is permitted by C11).
8974 : : If MS or Plan 9 extensions are enabled and foo names a
8975 : : structure, then again this is an anonymous struct.
8976 : : Otherwise this is an error.
8977 : :
8978 : : Oh what a horrid tangled web we weave. I wonder if MS consciously
8979 : : took this from Plan 9 or if it was an accident of implementation
8980 : : that took root before someone noticed the bug... */
8981 : :
8982 : 10085 : tree type = declspecs->type;
8983 : 10085 : bool ok = false;
8984 : :
8985 : 10085 : if (RECORD_OR_UNION_TYPE_P (type)
8986 : 10079 : && (flag_ms_extensions
8987 : 10069 : || flag_plan9_extensions
8988 : 10054 : || !declspecs->typedef_p))
8989 : : {
8990 : 10072 : if (flag_ms_extensions || flag_plan9_extensions)
8991 : : ok = true;
8992 : 10047 : else if (TYPE_NAME (type) == NULL)
8993 : : ok = true;
8994 : : else
8995 : : ok = false;
8996 : : }
8997 : : if (!ok)
8998 : : {
8999 : 27 : pedwarn (loc, 0, "declaration does not declare anything");
9000 : 27 : return NULL_TREE;
9001 : : }
9002 : 10058 : if (flag_isoc99)
9003 : 10036 : pedwarn_c99 (loc, OPT_Wpedantic,
9004 : : "ISO C99 doesn%'t support unnamed structs/unions");
9005 : : else
9006 : 22 : pedwarn_c99 (loc, OPT_Wpedantic,
9007 : : "ISO C90 doesn%'t support unnamed structs/unions");
9008 : : }
9009 : :
9010 : 3850147 : value = grokdeclarator (declarator, declspecs, FIELD, false,
9011 : 3850147 : width ? &width : NULL, decl_attrs, expr, NULL,
9012 : : DEPRECATED_NORMAL);
9013 : :
9014 : 3850147 : finish_decl (value, loc, NULL_TREE, NULL_TREE, NULL_TREE);
9015 : 3850147 : DECL_INITIAL (value) = width;
9016 : 3850147 : if (width)
9017 : 39375 : SET_DECL_C_BIT_FIELD (value);
9018 : :
9019 : 3850147 : if (warn_cxx_compat && DECL_NAME (value) != NULL_TREE)
9020 : : {
9021 : : /* If we currently have a binding for this field, set the
9022 : : in_struct field in the binding, so that we warn about lookups
9023 : : which find it. */
9024 : 938 : struct c_binding *b = I_SYMBOL_BINDING (DECL_NAME (value));
9025 : 938 : if (b != NULL)
9026 : : {
9027 : : /* If the in_struct field is not yet set, push it on a list
9028 : : to be cleared when this struct is finished. */
9029 : 19 : if (!b->in_struct)
9030 : : {
9031 : 17 : struct_parse_info->fields.safe_push (b);
9032 : 17 : b->in_struct = 1;
9033 : : }
9034 : : }
9035 : : }
9036 : :
9037 : : return value;
9038 : : }
9039 : :
9040 : : /* Subroutine of detect_field_duplicates: return whether X and Y,
9041 : : which are both fields in the same struct, have duplicate field
9042 : : names. */
9043 : :
9044 : : static bool
9045 : 3632509 : is_duplicate_field (tree x, tree y)
9046 : : {
9047 : 3632509 : if (DECL_NAME (x) != NULL_TREE && DECL_NAME (x) == DECL_NAME (y))
9048 : : return true;
9049 : :
9050 : : /* When using -fplan9-extensions, an anonymous field whose name is a
9051 : : typedef can duplicate a field name. */
9052 : 3632508 : if (flag_plan9_extensions
9053 : 3632508 : && (DECL_NAME (x) == NULL_TREE || DECL_NAME (y) == NULL_TREE))
9054 : : {
9055 : 0 : tree xt, xn, yt, yn;
9056 : :
9057 : 0 : xt = TREE_TYPE (x);
9058 : 0 : if (DECL_NAME (x) != NULL_TREE)
9059 : 0 : xn = DECL_NAME (x);
9060 : 0 : else if (RECORD_OR_UNION_TYPE_P (xt)
9061 : 0 : && TYPE_NAME (xt) != NULL_TREE
9062 : 0 : && TREE_CODE (TYPE_NAME (xt)) == TYPE_DECL)
9063 : 0 : xn = DECL_NAME (TYPE_NAME (xt));
9064 : : else
9065 : : xn = NULL_TREE;
9066 : :
9067 : 0 : yt = TREE_TYPE (y);
9068 : 0 : if (DECL_NAME (y) != NULL_TREE)
9069 : 0 : yn = DECL_NAME (y);
9070 : 0 : else if (RECORD_OR_UNION_TYPE_P (yt)
9071 : 0 : && TYPE_NAME (yt) != NULL_TREE
9072 : 0 : && TREE_CODE (TYPE_NAME (yt)) == TYPE_DECL)
9073 : 0 : yn = DECL_NAME (TYPE_NAME (yt));
9074 : : else
9075 : : yn = NULL_TREE;
9076 : :
9077 : 0 : if (xn != NULL_TREE && xn == yn)
9078 : : return true;
9079 : : }
9080 : :
9081 : : return false;
9082 : : }
9083 : :
9084 : : /* Subroutine of detect_field_duplicates: add the fields of FIELDLIST
9085 : : to HTAB, giving errors for any duplicates. */
9086 : :
9087 : : static void
9088 : 75084 : detect_field_duplicates_hash (tree fieldlist,
9089 : : hash_table<nofree_ptr_hash <tree_node> > *htab)
9090 : : {
9091 : 75084 : tree x, y;
9092 : 75084 : tree_node **slot;
9093 : :
9094 : 1289792 : for (x = fieldlist; x ; x = DECL_CHAIN (x))
9095 : 1214708 : if ((y = DECL_NAME (x)) != NULL_TREE)
9096 : : {
9097 : 1195753 : slot = htab->find_slot (y, INSERT);
9098 : 1195753 : if (*slot)
9099 : : {
9100 : 15 : error ("duplicate member %q+D", x);
9101 : 15 : DECL_NAME (x) = NULL_TREE;
9102 : : }
9103 : 1195753 : *slot = y;
9104 : : }
9105 : 18955 : else if (RECORD_OR_UNION_TYPE_P (TREE_TYPE (x)))
9106 : : {
9107 : 10745 : detect_field_duplicates_hash (TYPE_FIELDS (TREE_TYPE (x)), htab);
9108 : :
9109 : : /* When using -fplan9-extensions, an anonymous field whose
9110 : : name is a typedef can duplicate a field name. */
9111 : 10745 : if (flag_plan9_extensions
9112 : 15 : && TYPE_NAME (TREE_TYPE (x)) != NULL_TREE
9113 : 10759 : && TREE_CODE (TYPE_NAME (TREE_TYPE (x))) == TYPE_DECL)
9114 : : {
9115 : 2 : tree xn = DECL_NAME (TYPE_NAME (TREE_TYPE (x)));
9116 : 2 : slot = htab->find_slot (xn, INSERT);
9117 : 2 : if (*slot)
9118 : 0 : error ("duplicate member %q+D", TYPE_NAME (TREE_TYPE (x)));
9119 : 2 : *slot = xn;
9120 : : }
9121 : : }
9122 : 75084 : }
9123 : :
9124 : : /* Generate an error for any duplicate field names in FIELDLIST. Munge
9125 : : the list such that this does not present a problem later. */
9126 : :
9127 : : static void
9128 : 1072932 : detect_field_duplicates (tree fieldlist)
9129 : : {
9130 : 1072932 : tree x, y;
9131 : 1072932 : int timeout = 10;
9132 : :
9133 : : /* If the struct is the list of instance variables of an Objective-C
9134 : : class, then we need to check all the instance variables of
9135 : : superclasses when checking for duplicates (since you can't have
9136 : : an instance variable in a subclass with the same name as an
9137 : : instance variable in a superclass). We pass on this job to the
9138 : : Objective-C compiler. objc_detect_field_duplicates() will return
9139 : : false if we are not checking the list of instance variables and
9140 : : the C frontend should proceed with the standard field duplicate
9141 : : checks. If we are checking the list of instance variables, the
9142 : : ObjC frontend will do the check, emit the errors if needed, and
9143 : : then return true. */
9144 : 1072932 : if (c_dialect_objc ())
9145 : 0 : if (objc_detect_field_duplicates (false))
9146 : : return;
9147 : :
9148 : : /* First, see if there are more than "a few" fields.
9149 : : This is trivially true if there are zero or one fields. */
9150 : 1072932 : if (!fieldlist || !DECL_CHAIN (fieldlist))
9151 : : return;
9152 : : x = fieldlist;
9153 : 3085287 : do {
9154 : 3085287 : timeout--;
9155 : 3085287 : if (DECL_NAME (x) == NULL_TREE
9156 : 3085287 : && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x)))
9157 : : timeout = 0;
9158 : 3085287 : x = DECL_CHAIN (x);
9159 : 3085287 : } while (timeout > 0 && x);
9160 : :
9161 : : /* If there were "few" fields and no anonymous structures or unions,
9162 : : avoid the overhead of allocating a hash table. Instead just do
9163 : : the nested traversal thing. */
9164 : 876775 : if (timeout > 0)
9165 : : {
9166 : 2476031 : for (x = DECL_CHAIN (fieldlist); x; x = DECL_CHAIN (x))
9167 : : /* When using -fplan9-extensions, we can have duplicates
9168 : : between typedef names and fields. */
9169 : 1663595 : if (DECL_NAME (x)
9170 : 1663595 : || (flag_plan9_extensions
9171 : 0 : && DECL_NAME (x) == NULL_TREE
9172 : 0 : && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))
9173 : 0 : && TYPE_NAME (TREE_TYPE (x)) != NULL_TREE
9174 : 0 : && TREE_CODE (TYPE_NAME (TREE_TYPE (x))) == TYPE_DECL))
9175 : : {
9176 : 5295597 : for (y = fieldlist; y != x; y = TREE_CHAIN (y))
9177 : 3632509 : if (is_duplicate_field (y, x))
9178 : : {
9179 : 1 : error ("duplicate member %q+D", x);
9180 : 1 : DECL_NAME (x) = NULL_TREE;
9181 : : }
9182 : : }
9183 : : }
9184 : : else
9185 : : {
9186 : 64339 : hash_table<nofree_ptr_hash <tree_node> > htab (37);
9187 : 64339 : detect_field_duplicates_hash (fieldlist, &htab);
9188 : 64339 : }
9189 : : }
9190 : :
9191 : : /* Finish up struct info used by -Wc++-compat. */
9192 : :
9193 : : static void
9194 : 447 : warn_cxx_compat_finish_struct (tree fieldlist, enum tree_code code,
9195 : : location_t record_loc)
9196 : : {
9197 : 447 : unsigned int ix;
9198 : 447 : tree x;
9199 : 447 : struct c_binding *b;
9200 : :
9201 : 447 : if (fieldlist == NULL_TREE)
9202 : : {
9203 : 9 : if (code == RECORD_TYPE)
9204 : 6 : warning_at (record_loc, OPT_Wc___compat,
9205 : : "empty struct has size 0 in C, size 1 in C++");
9206 : : else
9207 : 3 : warning_at (record_loc, OPT_Wc___compat,
9208 : : "empty union has size 0 in C, size 1 in C++");
9209 : : }
9210 : :
9211 : : /* Set the C_TYPE_DEFINED_IN_STRUCT flag for each type defined in
9212 : : the current struct. We do this now at the end of the struct
9213 : : because the flag is used to issue visibility warnings, and we
9214 : : only want to issue those warnings if the type is referenced
9215 : : outside of the struct declaration. */
9216 : 493 : FOR_EACH_VEC_ELT (struct_parse_info->struct_types, ix, x)
9217 : 46 : C_TYPE_DEFINED_IN_STRUCT (x) = 1;
9218 : :
9219 : : /* The TYPEDEFS_SEEN field of STRUCT_PARSE_INFO is a list of
9220 : : typedefs used when declaring fields in this struct. If the name
9221 : : of any of the fields is also a typedef name then the struct would
9222 : : not parse in C++, because the C++ lookup rules say that the
9223 : : typedef name would be looked up in the context of the struct, and
9224 : : would thus be the field rather than the typedef. */
9225 : 447 : if (!struct_parse_info->typedefs_seen.is_empty ()
9226 : 56 : && fieldlist != NULL_TREE)
9227 : : {
9228 : : /* Use a hash_set<tree> using the name of the typedef. We can use
9229 : : a hash_set<tree> because identifiers are interned. */
9230 : 56 : hash_set<tree> tset;
9231 : :
9232 : 210 : FOR_EACH_VEC_ELT (struct_parse_info->typedefs_seen, ix, x)
9233 : 98 : tset.add (DECL_NAME (x));
9234 : :
9235 : 292 : for (x = fieldlist; x != NULL_TREE; x = DECL_CHAIN (x))
9236 : : {
9237 : 236 : if (DECL_NAME (x) != NULL_TREE
9238 : 236 : && tset.contains (DECL_NAME (x)))
9239 : : {
9240 : 2 : warning_at (DECL_SOURCE_LOCATION (x), OPT_Wc___compat,
9241 : : ("using %qD as both field and typedef name is "
9242 : : "invalid in C++"),
9243 : : x);
9244 : : /* FIXME: It would be nice to report the location where
9245 : : the typedef name is used. */
9246 : : }
9247 : : }
9248 : 56 : }
9249 : :
9250 : : /* For each field which has a binding and which was not defined in
9251 : : an enclosing struct, clear the in_struct field. */
9252 : 464 : FOR_EACH_VEC_ELT (struct_parse_info->fields, ix, b)
9253 : 17 : b->in_struct = 0;
9254 : 447 : }
9255 : :
9256 : : /* Function to help qsort sort FIELD_DECLs by name order. */
9257 : :
9258 : : static int
9259 : 17828462 : field_decl_cmp (const void *x_p, const void *y_p)
9260 : : {
9261 : 17828462 : const tree *const x = (const tree *) x_p;
9262 : 17828462 : const tree *const y = (const tree *) y_p;
9263 : :
9264 : 17828462 : if (DECL_NAME (*x) == DECL_NAME (*y))
9265 : : /* A nontype is "greater" than a type. */
9266 : 0 : return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL);
9267 : 17828462 : if (DECL_NAME (*x) == NULL_TREE)
9268 : : return -1;
9269 : 17828462 : if (DECL_NAME (*y) == NULL_TREE)
9270 : : return 1;
9271 : 17828462 : if (DECL_NAME (*x) < DECL_NAME (*y))
9272 : 8784479 : return -1;
9273 : : return 1;
9274 : : }
9275 : :
9276 : : /* If this structure or union completes the type of any previous
9277 : : variable declaration, lay it out and output its rtl. */
9278 : : static void
9279 : 1234144 : finish_incomplete_vars (tree incomplete_vars, bool toplevel)
9280 : : {
9281 : 1234265 : for (tree x = incomplete_vars; x; x = TREE_CHAIN (x))
9282 : : {
9283 : 121 : tree decl = TREE_VALUE (x);
9284 : 121 : if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
9285 : 0 : layout_array_type (TREE_TYPE (decl));
9286 : 121 : if (TREE_CODE (decl) != TYPE_DECL)
9287 : : {
9288 : 121 : relayout_decl (decl);
9289 : 121 : if (c_dialect_objc ())
9290 : 0 : objc_check_decl (decl);
9291 : 121 : rest_of_decl_compilation (decl, toplevel, 0);
9292 : : }
9293 : : }
9294 : 1234144 : }
9295 : :
9296 : : /* Determine whether the FIELD_DECL X is a flexible array member according to
9297 : : the following info:
9298 : : A. whether the FIELD_DECL X is the last field of the DECL_CONTEXT;
9299 : : B. whether the FIELD_DECL is an array that is declared as "[]", "[0]",
9300 : : or "[1]";
9301 : : C. flag_strict_flex_arrays;
9302 : : D. the attribute strict_flex_array that is attached to the field
9303 : : if presenting.
9304 : : Return TRUE when it's a flexible array member, FALSE otherwise. */
9305 : :
9306 : : static bool
9307 : 3850204 : is_flexible_array_member_p (bool is_last_field,
9308 : : tree x)
9309 : : {
9310 : : /* If not the last field, return false. */
9311 : 3850204 : if (!is_last_field)
9312 : : return false;
9313 : :
9314 : : /* If not an array field, return false. */
9315 : 1510020 : if (TREE_CODE (TREE_TYPE (x)) != ARRAY_TYPE)
9316 : : return false;
9317 : :
9318 : 487486 : bool is_zero_length_array = zero_length_array_type_p (TREE_TYPE (x));
9319 : 487486 : bool is_one_element_array = one_element_array_type_p (TREE_TYPE (x));
9320 : 487486 : bool is_flexible_array = flexible_array_member_type_p (TREE_TYPE (x));
9321 : :
9322 : 487486 : unsigned int strict_flex_array_level = c_strict_flex_array_level_of (x);
9323 : :
9324 : 487486 : switch (strict_flex_array_level)
9325 : : {
9326 : : case 0:
9327 : : /* Default, all trailing arrays are flexible array members. */
9328 : : return true;
9329 : 77 : case 1:
9330 : : /* Level 1: all "[1]", "[0]", and "[]" are flexible array members. */
9331 : 77 : if (is_one_element_array)
9332 : : return true;
9333 : : /* FALLTHROUGH. */
9334 : 141 : case 2:
9335 : : /* Level 2: all "[0]", and "[]" are flexible array members. */
9336 : 141 : if (is_zero_length_array)
9337 : : return true;
9338 : : /* FALLTHROUGH. */
9339 : 200 : case 3:
9340 : : /* Level 3: Only "[]" are flexible array members. */
9341 : 200 : if (is_flexible_array)
9342 : : return true;
9343 : : break;
9344 : 0 : default:
9345 : 0 : gcc_unreachable ();
9346 : : }
9347 : : return false;
9348 : : }
9349 : :
9350 : :
9351 : : /* Fill in the fields of a RECORD_TYPE or UNION_TYPE node, T.
9352 : : LOC is the location of the RECORD_TYPE or UNION_TYPE's definition.
9353 : : FIELDLIST is a chain of FIELD_DECL nodes for the fields.
9354 : : ATTRIBUTES are attributes to be applied to the structure.
9355 : :
9356 : : ENCLOSING_STRUCT_PARSE_INFO is the value of STRUCT_PARSE_INFO when
9357 : : the struct was started. */
9358 : :
9359 : : tree
9360 : 1072932 : finish_struct (location_t loc, tree t, tree fieldlist, tree attributes,
9361 : : class c_struct_parse_info *enclosing_struct_parse_info,
9362 : : tree *expr)
9363 : : {
9364 : 1072932 : tree x;
9365 : 1072932 : bool toplevel = file_scope == current_scope;
9366 : :
9367 : : /* If this type was previously laid out as a forward reference,
9368 : : make sure we lay it out again. */
9369 : :
9370 : 1072932 : TYPE_SIZE (t) = NULL_TREE;
9371 : :
9372 : 1072932 : decl_attributes (&t, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
9373 : :
9374 : 1072932 : if (pedantic)
9375 : : {
9376 : 7222 : for (x = fieldlist; x; x = DECL_CHAIN (x))
9377 : : {
9378 : 7209 : if (DECL_NAME (x) != NULL_TREE)
9379 : : break;
9380 : 14 : if (flag_isoc11 && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x)))
9381 : : break;
9382 : : }
9383 : :
9384 : 7212 : if (x == NULL_TREE)
9385 : : {
9386 : 13 : if (TREE_CODE (t) == UNION_TYPE)
9387 : : {
9388 : 4 : if (fieldlist)
9389 : 2 : pedwarn (loc, OPT_Wpedantic, "union has no named members");
9390 : : else
9391 : 2 : pedwarn (loc, OPT_Wpedantic, "union has no members");
9392 : : }
9393 : : else
9394 : : {
9395 : 9 : if (fieldlist)
9396 : 2 : pedwarn (loc, OPT_Wpedantic, "struct has no named members");
9397 : : else
9398 : 7 : pedwarn (loc, OPT_Wpedantic, "struct has no members");
9399 : : }
9400 : : }
9401 : : }
9402 : :
9403 : : /* Install struct as DECL_CONTEXT of each field decl.
9404 : : Also process specified field sizes, found in the DECL_INITIAL,
9405 : : storing 0 there after the type has been changed to precision equal
9406 : : to its width, rather than the precision of the specified standard
9407 : : type. (Correct layout requires the original type to have been preserved
9408 : : until now.) */
9409 : :
9410 : : bool saw_named_field = false;
9411 : 4923171 : for (x = fieldlist; x; x = DECL_CHAIN (x))
9412 : : {
9413 : : /* Whether this field is the last field of the structure or union.
9414 : : for UNION, any field is the last field of it. */
9415 : 3850239 : bool is_last_field = (DECL_CHAIN (x) == NULL_TREE)
9416 : 3850239 : || (TREE_CODE (t) == UNION_TYPE);
9417 : :
9418 : 3850239 : if (TREE_TYPE (x) == error_mark_node)
9419 : 35 : continue;
9420 : :
9421 : 3850204 : DECL_CONTEXT (x) = t;
9422 : :
9423 : 3850204 : tree t1 = strip_array_types (TREE_TYPE (x));
9424 : : /* If any field is const, the structure type is pseudo-const. */
9425 : 3850204 : if (TREE_READONLY (x))
9426 : 57216 : C_TYPE_FIELDS_READONLY (t) = 1;
9427 : : else
9428 : : {
9429 : : /* A field that is pseudo-const makes the structure likewise. */
9430 : 3792988 : if (RECORD_OR_UNION_TYPE_P (t1) && C_TYPE_FIELDS_READONLY (t1))
9431 : 641 : C_TYPE_FIELDS_READONLY (t) = 1;
9432 : : }
9433 : :
9434 : : /* Any field that is volatile means variables of this type must be
9435 : : treated in some ways as volatile. */
9436 : 3850204 : if (TREE_THIS_VOLATILE (x))
9437 : : {
9438 : 321 : C_TYPE_FIELDS_VOLATILE (t) = 1;
9439 : 321 : C_TYPE_FIELDS_NON_CONSTEXPR (t) = 1;
9440 : : }
9441 : :
9442 : : /* Any field that is volatile, restrict-qualified or atomic
9443 : : means the type cannot be used for a constexpr object. */
9444 : 3850204 : if (TYPE_QUALS (t1)
9445 : 3850204 : & (TYPE_QUAL_VOLATILE | TYPE_QUAL_RESTRICT | TYPE_QUAL_ATOMIC))
9446 : 1212 : C_TYPE_FIELDS_NON_CONSTEXPR (t) = 1;
9447 : 3848992 : else if (RECORD_OR_UNION_TYPE_P (t1) && C_TYPE_FIELDS_NON_CONSTEXPR (t1))
9448 : 30 : C_TYPE_FIELDS_NON_CONSTEXPR (t) = 1;
9449 : :
9450 : : /* Any field of nominal variable size implies structure is too. */
9451 : 3850204 : if (C_DECL_VARIABLE_SIZE (x))
9452 : 616 : C_TYPE_VARIABLE_SIZE (t) = 1;
9453 : :
9454 : : /* If any field is variably modified, record this fact. */
9455 : 3850204 : if (C_TYPE_VARIABLY_MODIFIED (TREE_TYPE (x)))
9456 : 638 : C_TYPE_VARIABLY_MODIFIED (t) = 1;
9457 : :
9458 : 3850204 : if (DECL_C_BIT_FIELD (x))
9459 : : {
9460 : 39386 : unsigned HOST_WIDE_INT width = tree_to_uhwi (DECL_INITIAL (x));
9461 : 39386 : DECL_SIZE (x) = bitsize_int (width);
9462 : 39386 : DECL_BIT_FIELD (x) = 1;
9463 : : }
9464 : :
9465 : 3850204 : if (TYPE_PACKED (t)
9466 : 3855019 : && (DECL_BIT_FIELD (x)
9467 : 2497 : || TYPE_ALIGN (TREE_TYPE (x)) > BITS_PER_UNIT))
9468 : 4063 : DECL_PACKED (x) = 1;
9469 : :
9470 : : /* Detect flexible array member in an invalid context. */
9471 : 3850204 : if (flexible_array_member_type_p (TREE_TYPE (x)))
9472 : : {
9473 : 59668 : if (TREE_CODE (t) == UNION_TYPE)
9474 : : {
9475 : 3 : error_at (DECL_SOURCE_LOCATION (x),
9476 : : "flexible array member in union");
9477 : 3 : TREE_TYPE (x) = error_mark_node;
9478 : : }
9479 : 59665 : else if (!is_last_field)
9480 : : {
9481 : 3 : error_at (DECL_SOURCE_LOCATION (x),
9482 : : "flexible array member not at end of struct");
9483 : 3 : TREE_TYPE (x) = error_mark_node;
9484 : : }
9485 : 59662 : else if (!saw_named_field)
9486 : : {
9487 : 6 : error_at (DECL_SOURCE_LOCATION (x),
9488 : : "flexible array member in a struct with no named "
9489 : : "members");
9490 : 6 : TREE_TYPE (x) = error_mark_node;
9491 : : }
9492 : : }
9493 : :
9494 : 24406 : if (pedantic && TREE_CODE (t) == RECORD_TYPE
9495 : 3870405 : && flexible_array_type_p (TREE_TYPE (x)))
9496 : 16 : pedwarn (DECL_SOURCE_LOCATION (x), OPT_Wpedantic,
9497 : : "invalid use of structure with flexible array member");
9498 : :
9499 : : /* Set DECL_NOT_FLEXARRAY flag for FIELD_DECL x. */
9500 : 3850204 : DECL_NOT_FLEXARRAY (x) = !is_flexible_array_member_p (is_last_field, x);
9501 : :
9502 : : /* Set TYPE_INCLUDES_FLEXARRAY for the context of x, t.
9503 : : when x is an array and is the last field. */
9504 : 3850204 : if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE)
9505 : 637069 : TYPE_INCLUDES_FLEXARRAY (t)
9506 : 1274138 : = is_last_field && flexible_array_member_type_p (TREE_TYPE (x));
9507 : : /* Recursively set TYPE_INCLUDES_FLEXARRAY for the context of x, t
9508 : : when x is an union or record and is the last field. */
9509 : 3213135 : else if (RECORD_OR_UNION_TYPE_P (TREE_TYPE (x)))
9510 : 415578 : TYPE_INCLUDES_FLEXARRAY (t)
9511 : 831156 : = is_last_field && TYPE_INCLUDES_FLEXARRAY (TREE_TYPE (x));
9512 : :
9513 : 3850204 : if (warn_flex_array_member_not_at_end
9514 : 40 : && !is_last_field
9515 : 16 : && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))
9516 : 3850212 : && TYPE_INCLUDES_FLEXARRAY (TREE_TYPE (x)))
9517 : 1 : warning_at (DECL_SOURCE_LOCATION (x),
9518 : : OPT_Wflex_array_member_not_at_end,
9519 : : "structure containing a flexible array member"
9520 : : " is not at the end of another structure");
9521 : :
9522 : 3850204 : if (DECL_NAME (x)
9523 : 3850204 : || RECORD_OR_UNION_TYPE_P (TREE_TYPE (x)))
9524 : : saw_named_field = true;
9525 : : }
9526 : :
9527 : 1072932 : detect_field_duplicates (fieldlist);
9528 : :
9529 : : /* Now we have the nearly final fieldlist. Record it,
9530 : : then lay out the structure or union (including the fields). */
9531 : :
9532 : 1072932 : TYPE_FIELDS (t) = fieldlist;
9533 : :
9534 : 1072932 : maybe_apply_pragma_scalar_storage_order (t);
9535 : :
9536 : 1072932 : layout_type (t);
9537 : :
9538 : 1072932 : if (TYPE_SIZE_UNIT (t)
9539 : 1072932 : && TREE_CODE (TYPE_SIZE_UNIT (t)) == INTEGER_CST
9540 : 1072354 : && !TREE_OVERFLOW (TYPE_SIZE_UNIT (t))
9541 : 2145286 : && !valid_constant_size_p (TYPE_SIZE_UNIT (t)))
9542 : 1 : error ("type %qT is too large", t);
9543 : :
9544 : : /* Give bit-fields their proper types and rewrite the type of array fields
9545 : : with scalar component if the enclosing type has reverse storage order. */
9546 : 4923171 : for (tree field = fieldlist; field; field = DECL_CHAIN (field))
9547 : : {
9548 : 3850239 : if (TREE_CODE (field) == FIELD_DECL
9549 : 3850239 : && DECL_INITIAL (field)
9550 : 3889633 : && TREE_TYPE (field) != error_mark_node)
9551 : : {
9552 : 39386 : unsigned HOST_WIDE_INT width
9553 : 39386 : = tree_to_uhwi (DECL_INITIAL (field));
9554 : 39386 : tree type = TREE_TYPE (field);
9555 : 39386 : if (width != TYPE_PRECISION (type))
9556 : : {
9557 : 25561 : if (TREE_CODE (type) == BITINT_TYPE
9558 : 25597 : && width >= (TYPE_UNSIGNED (type) ? 1 : 2))
9559 : 77 : TREE_TYPE (field)
9560 : 154 : = build_bitint_type (width, TYPE_UNSIGNED (type));
9561 : : else
9562 : 25484 : TREE_TYPE (field)
9563 : 25484 : = c_build_bitfield_integer_type (width,
9564 : 25484 : TYPE_UNSIGNED (type));
9565 : 25561 : if (tree attr = c_hardbool_type_attr (type))
9566 : 253 : decl_attributes (&TREE_TYPE (field),
9567 : : copy_list (attr),
9568 : : 0, NULL_TREE);
9569 : 25561 : SET_DECL_MODE (field, TYPE_MODE (TREE_TYPE (field)));
9570 : : }
9571 : 39386 : DECL_INITIAL (field) = NULL_TREE;
9572 : : }
9573 : 3810853 : else if (TYPE_REVERSE_STORAGE_ORDER (t)
9574 : 686 : && TREE_CODE (field) == FIELD_DECL
9575 : 3811539 : && TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE)
9576 : : {
9577 : 106 : tree ftype = TREE_TYPE (field);
9578 : 106 : tree ctype = strip_array_types (ftype);
9579 : 106 : if (!RECORD_OR_UNION_TYPE_P (ctype) && TYPE_MODE (ctype) != QImode)
9580 : : {
9581 : 93 : tree fmain_type = TYPE_MAIN_VARIANT (ftype);
9582 : 93 : tree *typep = &fmain_type;
9583 : 95 : do {
9584 : 95 : *typep = build_distinct_type_copy (*typep);
9585 : 95 : TYPE_REVERSE_STORAGE_ORDER (*typep) = 1;
9586 : 95 : typep = &TREE_TYPE (*typep);
9587 : 95 : } while (TREE_CODE (*typep) == ARRAY_TYPE);
9588 : 93 : TREE_TYPE (field)
9589 : 186 : = c_build_qualified_type (fmain_type, TYPE_QUALS (ftype));
9590 : : }
9591 : : }
9592 : :
9593 : : /* Warn on problematic type punning for storage order purposes. */
9594 : 3850239 : if (TREE_CODE (t) == UNION_TYPE
9595 : 785645 : && TREE_CODE (field) == FIELD_DECL
9596 : 4635884 : && AGGREGATE_TYPE_P (TREE_TYPE (field)))
9597 : : {
9598 : 388241 : tree ftype = TREE_TYPE (field);
9599 : 388241 : if (TREE_CODE (ftype) == ARRAY_TYPE)
9600 : 285497 : ftype = strip_array_types (ftype);
9601 : 388241 : if (RECORD_OR_UNION_TYPE_P (ftype)
9602 : 388241 : && TYPE_REVERSE_STORAGE_ORDER (ftype)
9603 : 103238 : != TYPE_REVERSE_STORAGE_ORDER (t))
9604 : 1 : warning_at (DECL_SOURCE_LOCATION (field),
9605 : : OPT_Wscalar_storage_order,
9606 : : "type punning toggles scalar storage order");
9607 : : }
9608 : : }
9609 : :
9610 : : /* Now we have the truly final field list.
9611 : : Store it in this type and in the variants. */
9612 : :
9613 : 1072932 : TYPE_FIELDS (t) = fieldlist;
9614 : :
9615 : : /* If there are lots of fields, sort so we can look through them fast.
9616 : : We arbitrarily consider 16 or more elts to be "a lot". */
9617 : :
9618 : 1072932 : {
9619 : 1072932 : int len = 0;
9620 : :
9621 : 4544624 : for (x = fieldlist; x; x = DECL_CHAIN (x))
9622 : : {
9623 : 3498007 : if (len > 15 || DECL_NAME (x) == NULL)
9624 : : break;
9625 : 3471692 : len += 1;
9626 : : }
9627 : :
9628 : 1072932 : if (len > 15)
9629 : : {
9630 : 21594 : tree *field_array;
9631 : 21594 : struct lang_type *space;
9632 : 21594 : struct sorted_fields_type *space2;
9633 : :
9634 : 21594 : len += list_length (x);
9635 : :
9636 : : /* Use the same allocation policy here that make_node uses, to
9637 : : ensure that this lives as long as the rest of the struct decl.
9638 : : All decls in an inline function need to be saved. */
9639 : :
9640 : 21594 : space = ggc_cleared_alloc<struct lang_type> ();
9641 : 21594 : space2 = (sorted_fields_type *) ggc_internal_alloc
9642 : 21594 : (sizeof (struct sorted_fields_type) + len * sizeof (tree));
9643 : :
9644 : 21594 : len = 0;
9645 : 21594 : space->s = space2;
9646 : 21594 : field_array = &space2->elts[0];
9647 : 713172 : for (x = fieldlist; x; x = DECL_CHAIN (x))
9648 : : {
9649 : 694558 : field_array[len++] = x;
9650 : :
9651 : : /* If there is anonymous struct or union, break out of the loop. */
9652 : 694558 : if (DECL_NAME (x) == NULL)
9653 : : break;
9654 : : }
9655 : : /* Found no anonymous struct/union. Add the TYPE_LANG_SPECIFIC. */
9656 : 21594 : if (x == NULL)
9657 : : {
9658 : 18614 : TYPE_LANG_SPECIFIC (t) = space;
9659 : 18614 : TYPE_LANG_SPECIFIC (t)->s->len = len;
9660 : 18614 : field_array = TYPE_LANG_SPECIFIC (t)->s->elts;
9661 : 18614 : qsort (field_array, len, sizeof (tree), field_decl_cmp);
9662 : : }
9663 : : }
9664 : : }
9665 : :
9666 : : /* If this was supposed to be a transparent union, but we can't
9667 : : make it one, warn and turn off the flag. */
9668 : 1072932 : if (TREE_CODE (t) == UNION_TYPE
9669 : 346359 : && TYPE_TRANSPARENT_AGGR (t)
9670 : 1072975 : && (!TYPE_FIELDS (t) || TYPE_MODE (t) != DECL_MODE (TYPE_FIELDS (t))))
9671 : : {
9672 : 13 : TYPE_TRANSPARENT_AGGR (t) = 0;
9673 : 13 : warning_at (loc, 0, "union cannot be made transparent");
9674 : : }
9675 : :
9676 : : /* Check for consistency with previous definition. */
9677 : 1072932 : if (flag_isoc23 && NULL != enclosing_struct_parse_info)
9678 : : {
9679 : 485 : tree vistype = previous_tag (t);
9680 : 485 : if (vistype
9681 : 56 : && TREE_CODE (vistype) == TREE_CODE (t)
9682 : 541 : && !C_TYPE_BEING_DEFINED (vistype))
9683 : : {
9684 : 52 : TYPE_STUB_DECL (vistype) = TYPE_STUB_DECL (t);
9685 : 52 : if (c_type_variably_modified_p (t))
9686 : 6 : error ("redefinition of struct or union %qT with variably "
9687 : : "modified type", t);
9688 : 46 : else if (!comptypes_same_p (t, vistype))
9689 : 19 : error ("redefinition of struct or union %qT", t);
9690 : : }
9691 : : }
9692 : :
9693 : 1072932 : C_TYPE_BEING_DEFINED (t) = 0;
9694 : :
9695 : : /* Set type canonical based on equivalence class. */
9696 : 1072932 : if (flag_isoc23)
9697 : : {
9698 : 820 : if (NULL == c_struct_htab)
9699 : 269 : c_struct_htab = hash_table<c_struct_hasher>::create_ggc (61);
9700 : :
9701 : 820 : hashval_t hash = c_struct_hasher::hash (t);
9702 : :
9703 : 820 : tree *e = c_struct_htab->find_slot_with_hash (t, hash, INSERT);
9704 : 820 : if (*e)
9705 : 148 : TYPE_CANONICAL (t) = *e;
9706 : : else
9707 : : {
9708 : 672 : TYPE_CANONICAL (t) = t;
9709 : 672 : *e = t;
9710 : : }
9711 : : }
9712 : :
9713 : 1072932 : tree incomplete_vars = C_TYPE_INCOMPLETE_VARS (TYPE_MAIN_VARIANT (t));
9714 : 2175031 : for (x = TYPE_MAIN_VARIANT (t); x; x = TYPE_NEXT_VARIANT (x))
9715 : : {
9716 : 1102099 : TYPE_FIELDS (x) = TYPE_FIELDS (t);
9717 : 1102099 : TYPE_LANG_SPECIFIC (x) = TYPE_LANG_SPECIFIC (t);
9718 : 1102099 : TYPE_TRANSPARENT_AGGR (x) = TYPE_TRANSPARENT_AGGR (t);
9719 : 1102099 : C_TYPE_FIELDS_READONLY (x) = C_TYPE_FIELDS_READONLY (t);
9720 : 1102099 : C_TYPE_FIELDS_VOLATILE (x) = C_TYPE_FIELDS_VOLATILE (t);
9721 : 1102099 : C_TYPE_FIELDS_NON_CONSTEXPR (x) = C_TYPE_FIELDS_NON_CONSTEXPR (t);
9722 : 1102099 : C_TYPE_VARIABLE_SIZE (x) = C_TYPE_VARIABLE_SIZE (t);
9723 : 1102099 : C_TYPE_VARIABLY_MODIFIED (x) = C_TYPE_VARIABLY_MODIFIED (t);
9724 : 1102099 : C_TYPE_INCOMPLETE_VARS (x) = NULL_TREE;
9725 : : }
9726 : :
9727 : : /* Update type location to the one of the definition, instead of e.g.
9728 : : a forward declaration. */
9729 : 1072932 : if (TYPE_STUB_DECL (t))
9730 : 1072932 : DECL_SOURCE_LOCATION (TYPE_STUB_DECL (t)) = loc;
9731 : :
9732 : : /* Finish debugging output for this type. */
9733 : 1072932 : rest_of_type_compilation (t, toplevel);
9734 : :
9735 : 1072932 : finish_incomplete_vars (incomplete_vars, toplevel);
9736 : :
9737 : : /* Make sure a DECL_EXPR is created for structs with VLA members.
9738 : : Because we do not know the context, we always pass expr
9739 : : to force creation of a BIND_EXPR which is required in some
9740 : : contexts. */
9741 : 1072932 : if (c_type_variably_modified_p (t))
9742 : 598 : add_decl_expr (loc, t, expr, false);
9743 : :
9744 : 1072932 : if (warn_cxx_compat)
9745 : 447 : warn_cxx_compat_finish_struct (fieldlist, TREE_CODE (t), loc);
9746 : :
9747 : 1072932 : if (NULL != enclosing_struct_parse_info)
9748 : : {
9749 : 1034292 : delete struct_parse_info;
9750 : :
9751 : 1034292 : struct_parse_info = enclosing_struct_parse_info;
9752 : :
9753 : : /* If this struct is defined inside a struct, add it to
9754 : : struct_types. */
9755 : 1034292 : if (warn_cxx_compat
9756 : : && struct_parse_info != NULL
9757 : 263 : && !in_sizeof && !in_typeof && !in_alignof)
9758 : 258 : struct_parse_info->struct_types.safe_push (t);
9759 : : }
9760 : :
9761 : 1072932 : return t;
9762 : : }
9763 : :
9764 : : static struct {
9765 : : gt_pointer_operator new_value;
9766 : : void *cookie;
9767 : : } resort_data;
9768 : :
9769 : : /* This routine compares two fields like field_decl_cmp but using the
9770 : : pointer operator in resort_data. */
9771 : :
9772 : : static int
9773 : 4580 : resort_field_decl_cmp (const void *x_p, const void *y_p)
9774 : : {
9775 : 4580 : const tree *const x = (const tree *) x_p;
9776 : 4580 : const tree *const y = (const tree *) y_p;
9777 : :
9778 : 4580 : if (DECL_NAME (*x) == DECL_NAME (*y))
9779 : : /* A nontype is "greater" than a type. */
9780 : 0 : return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL);
9781 : 4580 : if (DECL_NAME (*x) == NULL_TREE)
9782 : : return -1;
9783 : 4580 : if (DECL_NAME (*y) == NULL_TREE)
9784 : : return 1;
9785 : 4580 : {
9786 : 4580 : tree d1 = DECL_NAME (*x);
9787 : 4580 : tree d2 = DECL_NAME (*y);
9788 : 4580 : resort_data.new_value (&d1, &d1, resort_data.cookie);
9789 : 4580 : resort_data.new_value (&d2, &d2, resort_data.cookie);
9790 : 4580 : if (d1 < d2)
9791 : 2282 : return -1;
9792 : : }
9793 : 2298 : return 1;
9794 : : }
9795 : :
9796 : : /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */
9797 : :
9798 : : void
9799 : 6 : resort_sorted_fields (void *obj,
9800 : : void * ARG_UNUSED (orig_obj),
9801 : : gt_pointer_operator new_value,
9802 : : void *cookie)
9803 : : {
9804 : 6 : struct sorted_fields_type *sf = (struct sorted_fields_type *) obj;
9805 : 6 : resort_data.new_value = new_value;
9806 : 6 : resort_data.cookie = cookie;
9807 : 6 : qsort (&sf->elts[0], sf->len, sizeof (tree),
9808 : : resort_field_decl_cmp);
9809 : 6 : }
9810 : :
9811 : : /* Lay out the type T, and its element type, and so on. */
9812 : :
9813 : : static void
9814 : 0 : layout_array_type (tree t)
9815 : : {
9816 : 0 : if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE)
9817 : 0 : layout_array_type (TREE_TYPE (t));
9818 : 0 : layout_type (t);
9819 : 0 : }
9820 : :
9821 : : /* Begin compiling the definition of an enumeration type.
9822 : : NAME is its name (or null if anonymous).
9823 : : LOC is the enum's location.
9824 : : FIXED_UNDERLYING_TYPE is the (C23) underlying type specified in the
9825 : : definition.
9826 : : Returns the type object, as yet incomplete.
9827 : : Also records info about it so that build_enumerator
9828 : : may be used to declare the individual values as they are read. */
9829 : :
9830 : : tree
9831 : 161212 : start_enum (location_t loc, struct c_enum_contents *the_enum, tree name,
9832 : : tree fixed_underlying_type, bool potential_nesting_p)
9833 : : {
9834 : 161212 : tree enumtype = NULL_TREE;
9835 : 161212 : location_t enumloc = UNKNOWN_LOCATION;
9836 : :
9837 : : /* If this is the real definition for a previous forward reference,
9838 : : fill in the contents in the same object that used to be the
9839 : : forward reference. */
9840 : :
9841 : 161212 : if (name != NULL_TREE)
9842 : 64768 : enumtype = lookup_tag (ENUMERAL_TYPE, name, true, &enumloc);
9843 : :
9844 : 64768 : if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9845 : : {
9846 : : /* If the type is currently being defined or if we have seen an
9847 : : incomplete version which is now complete, this is a nested
9848 : : redefinition. The later happens if the redefinition occurs
9849 : : inside the enum specifier itself. */
9850 : 151 : if (C_TYPE_BEING_DEFINED (enumtype)
9851 : 151 : || (potential_nesting_p && TYPE_VALUES (enumtype) != NULL_TREE))
9852 : 9 : error_at (loc, "nested redefinition of %<enum %E%>", name);
9853 : :
9854 : : /* For C23 we allow redefinitions. We set to zero and check for
9855 : : consistency later. */
9856 : 266 : if (flag_isoc23 && TYPE_VALUES (enumtype) != NULL_TREE)
9857 : : enumtype = NULL_TREE;
9858 : : }
9859 : :
9860 : 96585 : if (enumtype == NULL_TREE || TREE_CODE (enumtype) != ENUMERAL_TYPE)
9861 : : {
9862 : 161073 : enumtype = make_node (ENUMERAL_TYPE);
9863 : 161073 : TYPE_SIZE (enumtype) = NULL_TREE;
9864 : 161073 : pushtag (loc, name, enumtype);
9865 : 161073 : if (fixed_underlying_type != NULL_TREE)
9866 : : {
9867 : : /* For an enum definition with a fixed underlying type, the
9868 : : type is complete during the definition and the
9869 : : enumeration constants have that type. If there was a
9870 : : tag, the type was completed in c_parser_enum_specifier.
9871 : : If not, it must be completed here. */
9872 : 9 : ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = true;
9873 : 9 : TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (fixed_underlying_type);
9874 : 9 : TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (fixed_underlying_type);
9875 : 9 : TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (fixed_underlying_type);
9876 : 9 : SET_TYPE_ALIGN (enumtype, TYPE_ALIGN (fixed_underlying_type));
9877 : 9 : TYPE_SIZE (enumtype) = NULL_TREE;
9878 : 9 : TYPE_PRECISION (enumtype) = TYPE_PRECISION (fixed_underlying_type);
9879 : 9 : ENUM_UNDERLYING_TYPE (enumtype) = fixed_underlying_type;
9880 : 9 : layout_type (enumtype);
9881 : : }
9882 : : }
9883 : : /* Update type location to the one of the definition, instead of e.g.
9884 : : a forward declaration. */
9885 : 139 : else if (TYPE_STUB_DECL (enumtype))
9886 : : {
9887 : 139 : enumloc = DECL_SOURCE_LOCATION (TYPE_STUB_DECL (enumtype));
9888 : 139 : DECL_SOURCE_LOCATION (TYPE_STUB_DECL (enumtype)) = loc;
9889 : : }
9890 : :
9891 : 161212 : C_TYPE_BEING_DEFINED (enumtype) = 1;
9892 : :
9893 : 161212 : if (TYPE_VALUES (enumtype) != NULL_TREE)
9894 : : {
9895 : : /* This enum is a named one that has been declared already. */
9896 : 6 : auto_diagnostic_group d;
9897 : 6 : error_at (loc, "redeclaration of %<enum %E%>", name);
9898 : 6 : if (enumloc != UNKNOWN_LOCATION)
9899 : 6 : inform (enumloc, "originally defined here");
9900 : :
9901 : : /* Completely replace its old definition.
9902 : : The old enumerators remain defined, however. */
9903 : 6 : TYPE_VALUES (enumtype) = NULL_TREE;
9904 : 6 : }
9905 : :
9906 : 161212 : if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype)
9907 : 161212 : && fixed_underlying_type == NULL_TREE)
9908 : : {
9909 : 3 : error_at (loc, "%<enum%> declared with but defined without "
9910 : : "fixed underlying type");
9911 : 3 : ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = false;
9912 : : }
9913 : :
9914 : 161212 : the_enum->enum_next_value = integer_zero_node;
9915 : 161212 : the_enum->enum_type = enumtype;
9916 : 161212 : the_enum->enum_overflow = 0;
9917 : :
9918 : 161212 : if (flag_short_enums && !ENUM_FIXED_UNDERLYING_TYPE_P (enumtype))
9919 : 106 : for (tree v = TYPE_MAIN_VARIANT (enumtype); v; v = TYPE_NEXT_VARIANT (v))
9920 : 53 : TYPE_PACKED (v) = 1;
9921 : :
9922 : : /* FIXME: This will issue a warning for a use of a type defined
9923 : : within sizeof in a statement expr. This is not terribly serious
9924 : : as C++ doesn't permit statement exprs within sizeof anyhow. */
9925 : 161212 : if (warn_cxx_compat && (in_sizeof || in_typeof || in_alignof))
9926 : 0 : warning_at (loc, OPT_Wc___compat,
9927 : : "defining type in %qs expression is invalid in C++",
9928 : : (in_sizeof
9929 : : ? "sizeof"
9930 : 0 : : (in_typeof ? "typeof" : "alignof")));
9931 : :
9932 : 161212 : if (in_underspecified_init)
9933 : 6 : error_at (loc, "%qT defined in underspecified object initializer",
9934 : : enumtype);
9935 : :
9936 : 161212 : return enumtype;
9937 : : }
9938 : :
9939 : : /* After processing and defining all the values of an enumeration type,
9940 : : install their decls in the enumeration type and finish it off.
9941 : : ENUMTYPE is the type object, VALUES a list of decl-value pairs,
9942 : : and ATTRIBUTES are the specified attributes.
9943 : : Returns ENUMTYPE. */
9944 : :
9945 : : tree
9946 : 161212 : finish_enum (tree enumtype, tree values, tree attributes)
9947 : : {
9948 : 161212 : tree pair, tem;
9949 : 161212 : tree minnode = NULL_TREE, maxnode = NULL_TREE;
9950 : 161212 : int precision;
9951 : 161212 : signop sign;
9952 : 161212 : bool toplevel = (file_scope == current_scope);
9953 : 161212 : struct lang_type *lt;
9954 : :
9955 : 161212 : decl_attributes (&enumtype, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
9956 : :
9957 : : /* Calculate the maximum value of any enumerator in this type. */
9958 : :
9959 : 161212 : if (values == error_mark_node)
9960 : 24 : minnode = maxnode = integer_zero_node;
9961 : : else
9962 : : {
9963 : 161188 : minnode = maxnode = TREE_VALUE (values);
9964 : 5348258 : for (pair = TREE_CHAIN (values); pair; pair = TREE_CHAIN (pair))
9965 : : {
9966 : 5187070 : tree value = TREE_VALUE (pair);
9967 : 5187070 : if (tree_int_cst_lt (maxnode, value))
9968 : 5060723 : maxnode = value;
9969 : 5187070 : if (tree_int_cst_lt (value, minnode))
9970 : 52498 : minnode = value;
9971 : : }
9972 : : }
9973 : :
9974 : : /* Construct the final type of this enumeration. It is the same
9975 : : as one of the integral types - the narrowest one that fits, except
9976 : : that normally we only go as narrow as int - and signed iff any of
9977 : : the values are negative. */
9978 : 161212 : sign = (tree_int_cst_sgn (minnode) >= 0) ? UNSIGNED : SIGNED;
9979 : 161212 : precision = MAX (tree_int_cst_min_precision (minnode, sign),
9980 : : tree_int_cst_min_precision (maxnode, sign));
9981 : :
9982 : 161212 : bool wider_than_int =
9983 : 161212 : (tree_int_cst_lt (minnode, TYPE_MIN_VALUE (integer_type_node))
9984 : 161212 : || tree_int_cst_lt (TYPE_MAX_VALUE (integer_type_node), maxnode));
9985 : :
9986 : :
9987 : 161212 : if (!ENUM_FIXED_UNDERLYING_TYPE_P (enumtype))
9988 : : {
9989 : : /* If the precision of the type was specified with an attribute and it
9990 : : was too small, give an error. Otherwise, use it. */
9991 : 161104 : if (TYPE_PRECISION (enumtype) && lookup_attribute ("mode", attributes))
9992 : : {
9993 : 23 : if (precision > TYPE_PRECISION (enumtype))
9994 : : {
9995 : 6 : TYPE_PRECISION (enumtype) = 0;
9996 : 6 : error ("specified mode too small for enumerated values");
9997 : : }
9998 : : else
9999 : 17 : precision = TYPE_PRECISION (enumtype);
10000 : : }
10001 : : else
10002 : 161081 : TYPE_PRECISION (enumtype) = 0;
10003 : :
10004 : 161104 : if (TYPE_PACKED (enumtype)
10005 : 161030 : || precision > TYPE_PRECISION (integer_type_node)
10006 : 320477 : || TYPE_PRECISION (enumtype))
10007 : : {
10008 : 1858 : tem = c_common_type_for_size (precision, sign == UNSIGNED ? 1 : 0);
10009 : 1743 : if (tem == NULL)
10010 : : {
10011 : : /* This should only occur when both signed and unsigned
10012 : : values of maximum precision occur among the
10013 : : enumerators. */
10014 : 3 : pedwarn (input_location, 0,
10015 : : "enumeration values exceed range of largest integer");
10016 : 3 : tem = widest_integer_literal_type_node;
10017 : : }
10018 : 1740 : else if (precision > TYPE_PRECISION (intmax_type_node)
10019 : 4 : && !tree_int_cst_lt (minnode,
10020 : 4 : TYPE_MIN_VALUE (intmax_type_node))
10021 : 1743 : && !tree_int_cst_lt (TYPE_MAX_VALUE (uintmax_type_node),
10022 : : maxnode))
10023 : 2 : pedwarn (input_location, OPT_Wpedantic,
10024 : : "enumeration values exceed range of %qs",
10025 : : sign == UNSIGNED ? "uintmax_t" : "intmax_t");
10026 : : }
10027 : : else
10028 : 159361 : tem = sign == UNSIGNED ? unsigned_type_node : integer_type_node;
10029 : :
10030 : 161104 : TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (tem);
10031 : 161104 : TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (tem);
10032 : 161104 : TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (tem);
10033 : 161104 : SET_TYPE_ALIGN (enumtype, TYPE_ALIGN (tem));
10034 : 161104 : TYPE_SIZE (enumtype) = NULL_TREE;
10035 : 161104 : TYPE_PRECISION (enumtype) = TYPE_PRECISION (tem);
10036 : 161104 : ENUM_UNDERLYING_TYPE (enumtype) =
10037 : 161104 : c_common_type_for_size (TYPE_PRECISION (tem), TYPE_UNSIGNED (tem));
10038 : :
10039 : 161104 : layout_type (enumtype);
10040 : : }
10041 : :
10042 : 161212 : if (values != error_mark_node)
10043 : : {
10044 : : /* Change the type of the enumerators to be the enum type. We
10045 : : need to do this irrespective of the size of the enum, for
10046 : : proper type checking. Replace the DECL_INITIALs of the
10047 : : enumerators, and the value slots of the list, with copies
10048 : : that have the enum type; they cannot be modified in place
10049 : : because they may be shared (e.g. integer_zero_node) Finally,
10050 : : change the purpose slots to point to the names of the decls. */
10051 : 5509446 : for (pair = values; pair; pair = TREE_CHAIN (pair))
10052 : : {
10053 : 5348258 : tree enu = TREE_PURPOSE (pair);
10054 : 5348258 : tree ini = DECL_INITIAL (enu);
10055 : :
10056 : 5348258 : TREE_TYPE (enu) = enumtype;
10057 : :
10058 : : /* Before C23, the ISO C Standard mandates enumerators to
10059 : : have type int, even though the underlying type of an enum
10060 : : type is unspecified. However, C23 allows enumerators of
10061 : : any integer type, and if an enumeration has any
10062 : : enumerators wider than int, all enumerators have the
10063 : : enumerated type after it is parsed. Any enumerators that
10064 : : fit in int are given type int in build_enumerator (which
10065 : : is the correct type while the enumeration is being
10066 : : parsed), so no conversions are needed here if all
10067 : : enumerators fit in int. If the enum has a fixed
10068 : : underlying type, the correct type was also given in
10069 : : build_enumerator. */
10070 : 5348258 : if (!ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) && wider_than_int)
10071 : 22296 : ini = convert (enumtype, ini);
10072 : :
10073 : 5348258 : DECL_INITIAL (enu) = ini;
10074 : 5348258 : TREE_PURPOSE (pair) = DECL_NAME (enu);
10075 : : /* To match the C++ FE, store the CONST_DECL rather than just its
10076 : : value. */
10077 : 5348258 : TREE_VALUE (pair) = enu;
10078 : : }
10079 : :
10080 : 161188 : TYPE_VALUES (enumtype) = values;
10081 : : }
10082 : :
10083 : : /* Record the min/max values so that we can warn about bit-field
10084 : : enumerations that are too small for the values. */
10085 : 161212 : lt = ggc_cleared_alloc<struct lang_type> ();
10086 : 161212 : lt->enum_min = minnode;
10087 : 161212 : lt->enum_max = maxnode;
10088 : 161212 : TYPE_LANG_SPECIFIC (enumtype) = lt;
10089 : :
10090 : : /* Fix up all variant types of this enum type. */
10091 : 161212 : tree incomplete_vars = C_TYPE_INCOMPLETE_VARS (TYPE_MAIN_VARIANT (enumtype));
10092 : 322432 : for (tem = TYPE_MAIN_VARIANT (enumtype); tem; tem = TYPE_NEXT_VARIANT (tem))
10093 : : {
10094 : 161220 : C_TYPE_INCOMPLETE_VARS (tem) = NULL_TREE;
10095 : 161220 : if (tem == enumtype)
10096 : 161212 : continue;
10097 : 8 : TYPE_VALUES (tem) = TYPE_VALUES (enumtype);
10098 : 8 : TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype);
10099 : 8 : TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype);
10100 : 8 : TYPE_SIZE (tem) = TYPE_SIZE (enumtype);
10101 : 8 : TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype);
10102 : 8 : SET_TYPE_MODE (tem, TYPE_MODE (enumtype));
10103 : 8 : TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype);
10104 : 8 : SET_TYPE_ALIGN (tem, TYPE_ALIGN (enumtype));
10105 : 8 : TYPE_USER_ALIGN (tem) = TYPE_USER_ALIGN (enumtype);
10106 : 8 : TYPE_UNSIGNED (tem) = TYPE_UNSIGNED (enumtype);
10107 : 8 : TYPE_LANG_SPECIFIC (tem) = TYPE_LANG_SPECIFIC (enumtype);
10108 : 8 : ENUM_UNDERLYING_TYPE (tem) = ENUM_UNDERLYING_TYPE (enumtype);
10109 : : }
10110 : :
10111 : : /* Finish debugging output for this type. */
10112 : 161212 : rest_of_type_compilation (enumtype, toplevel);
10113 : :
10114 : 161212 : finish_incomplete_vars (incomplete_vars, toplevel);
10115 : :
10116 : : /* If this enum is defined inside a struct, add it to
10117 : : struct_types. */
10118 : 161212 : if (warn_cxx_compat
10119 : 113 : && struct_parse_info != NULL
10120 : 37 : && !in_sizeof && !in_typeof && !in_alignof)
10121 : 37 : struct_parse_info->struct_types.safe_push (enumtype);
10122 : :
10123 : : /* Check for consistency with previous definition */
10124 : 161212 : if (flag_isoc23)
10125 : : {
10126 : 398 : tree vistype = previous_tag (enumtype);
10127 : 398 : if (vistype
10128 : 17 : && TREE_CODE (vistype) == TREE_CODE (enumtype)
10129 : 411 : && !C_TYPE_BEING_DEFINED (vistype))
10130 : : {
10131 : 13 : TYPE_STUB_DECL (vistype) = TYPE_STUB_DECL (enumtype);
10132 : 13 : if (!comptypes_same_p (enumtype, vistype))
10133 : 3 : error("conflicting redefinition of enum %qT", enumtype);
10134 : : }
10135 : : }
10136 : :
10137 : 161212 : C_TYPE_BEING_DEFINED (enumtype) = 0;
10138 : :
10139 : 161212 : return enumtype;
10140 : : }
10141 : :
10142 : : /* Build and install a CONST_DECL for one value of the
10143 : : current enumeration type (one that was begun with start_enum).
10144 : : DECL_LOC is the location of the enumerator.
10145 : : LOC is the location of the '=' operator if any, DECL_LOC otherwise.
10146 : : Return a tree-list containing the CONST_DECL and its value.
10147 : : Assignment of sequential values by default is handled here. */
10148 : :
10149 : : tree
10150 : 5348275 : build_enumerator (location_t decl_loc, location_t loc,
10151 : : struct c_enum_contents *the_enum, tree name, tree value)
10152 : : {
10153 : 5348275 : tree decl;
10154 : :
10155 : : /* Validate and default VALUE. */
10156 : :
10157 : 5348275 : if (value != NULL_TREE)
10158 : : {
10159 : : /* Don't issue more errors for error_mark_node (i.e. an
10160 : : undeclared identifier) - just ignore the value expression. */
10161 : 3279230 : if (value == error_mark_node)
10162 : : value = NULL_TREE;
10163 : 3278565 : else if (!INTEGRAL_TYPE_P (TREE_TYPE (value)))
10164 : : {
10165 : 6 : error_at (loc, "enumerator value for %qE is not an integer constant",
10166 : : name);
10167 : 6 : value = NULL_TREE;
10168 : : }
10169 : : else
10170 : : {
10171 : 3278559 : if (TREE_CODE (value) != INTEGER_CST)
10172 : : {
10173 : 101 : value = c_fully_fold (value, false, NULL);
10174 : 101 : if (TREE_CODE (value) == INTEGER_CST)
10175 : 52 : pedwarn (loc, OPT_Wpedantic,
10176 : : "enumerator value for %qE is not an integer "
10177 : : "constant expression", name);
10178 : : }
10179 : 3278559 : if (TREE_CODE (value) != INTEGER_CST)
10180 : : {
10181 : 49 : error ("enumerator value for %qE is not an integer constant",
10182 : : name);
10183 : 49 : value = NULL_TREE;
10184 : : }
10185 : : else
10186 : : {
10187 : 3278510 : value = default_conversion (value);
10188 : 3278510 : constant_expression_warning (value);
10189 : : }
10190 : : }
10191 : : }
10192 : :
10193 : : /* Default based on previous value. */
10194 : : /* It should no longer be possible to have NON_LVALUE_EXPR
10195 : : in the default. */
10196 : 3278565 : if (value == NULL_TREE)
10197 : : {
10198 : 2069765 : value = the_enum->enum_next_value;
10199 : 2069765 : if (the_enum->enum_overflow)
10200 : 7 : error_at (loc, "overflow in enumeration values");
10201 : : }
10202 : 5348275 : if (ENUM_FIXED_UNDERLYING_TYPE_P (the_enum->enum_type))
10203 : : {
10204 : : /* Enumeration constants must fit in the fixed underlying type. */
10205 : 149 : if (!int_fits_type_p (value, ENUM_UNDERLYING_TYPE (the_enum->enum_type)))
10206 : 3 : error_at (loc,
10207 : : "enumerator value outside the range of underlying type");
10208 : : /* Enumeration constants for an enum with fixed underlying type
10209 : : have the enum type, both inside and outside the
10210 : : definition. */
10211 : 149 : value = convert (the_enum->enum_type, value);
10212 : : }
10213 : : else
10214 : : {
10215 : : /* Even though the underlying type of an enum is unspecified, the
10216 : : type of enumeration constants is explicitly defined as int
10217 : : (6.4.4.3/2 in the C99 Standard). C23 allows any integer type, and
10218 : : GCC allows such types for older standards as an extension. */
10219 : 5348126 : bool warned_range = false;
10220 : 5348126 : if (!int_fits_type_p (value,
10221 : 5348126 : (TYPE_UNSIGNED (TREE_TYPE (value))
10222 : : ? uintmax_type_node
10223 : : : intmax_type_node)))
10224 : : /* GCC does not consider its types larger than intmax_t to be
10225 : : extended integer types (although C23 would permit such types to
10226 : : be considered extended integer types if all the features
10227 : : required by <stdint.h> and <inttypes.h> macros, such as support
10228 : : for integer constants and I/O, were present), so diagnose if
10229 : : such a wider type is used. (If the wider type arose from a
10230 : : constant of such a type, that will also have been diagnosed,
10231 : : but this is the only diagnostic in the case where it arises
10232 : : from choosing a wider type automatically when adding 1
10233 : : overflows.) */
10234 : 11 : warned_range = pedwarn (loc, OPT_Wpedantic,
10235 : : "enumerator value outside the range of %qs",
10236 : 11 : (TYPE_UNSIGNED (TREE_TYPE (value))
10237 : : ? "uintmax_t"
10238 : : : "intmax_t"));
10239 : 5348126 : if (!warned_range && !int_fits_type_p (value, integer_type_node))
10240 : 3547 : pedwarn_c11 (loc, OPT_Wpedantic,
10241 : : "ISO C restricts enumerator values to range of %<int%> "
10242 : : "before C23");
10243 : :
10244 : : /* The ISO C Standard mandates enumerators to have type int before
10245 : : C23, even though the underlying type of an enum type is
10246 : : unspecified. C23 allows enumerators of any integer type. During
10247 : : the parsing of the enumeration, C23 specifies that constants
10248 : : representable in int have type int, constants not representable
10249 : : in int have the type of the given expression if any, and
10250 : : constants not representable in int and derived by adding 1 to the
10251 : : previous constant have the type of that constant unless the
10252 : : addition would overflow or wraparound, in which case a wider type
10253 : : of the same signedness is chosen automatically; after the
10254 : : enumeration is parsed, all the constants have the type of the
10255 : : enumeration if any do not fit in int. */
10256 : 5348126 : if (int_fits_type_p (value, integer_type_node))
10257 : 5344575 : value = convert (integer_type_node, value);
10258 : : }
10259 : :
10260 : : /* Set basis for default for next value. */
10261 : 5348275 : if (ENUM_FIXED_UNDERLYING_TYPE_P (the_enum->enum_type))
10262 : : {
10263 : 149 : tree underlying_type = ENUM_UNDERLYING_TYPE (the_enum->enum_type);
10264 : 149 : if (TREE_CODE (underlying_type) == BOOLEAN_TYPE)
10265 : : /* A value of 2 following a value of 1 overflows bool, but we
10266 : : cannot carry out addition directly on bool without
10267 : : promotion, and converting the result of arithmetic in a
10268 : : wider type back to bool would not produce the right result
10269 : : for this overflow check. */
10270 : 60 : the_enum->enum_next_value = invert_truthvalue_loc (loc, value);
10271 : : else
10272 : 89 : the_enum->enum_next_value
10273 : 89 : = build_binary_op (EXPR_LOC_OR_LOC (value, input_location),
10274 : : PLUS_EXPR, convert (underlying_type, value),
10275 : : convert (underlying_type, integer_one_node),
10276 : : false);
10277 : : }
10278 : : else
10279 : 5348126 : the_enum->enum_next_value
10280 : 5348126 : = build_binary_op (EXPR_LOC_OR_LOC (value, input_location),
10281 : : PLUS_EXPR, value, integer_one_node, false);
10282 : 5348275 : the_enum->enum_overflow = tree_int_cst_lt (the_enum->enum_next_value, value);
10283 : 5348275 : if (the_enum->enum_overflow
10284 : 5348275 : && !ENUM_FIXED_UNDERLYING_TYPE_P (the_enum->enum_type))
10285 : : {
10286 : : /* Choose a wider type with the same signedness if
10287 : : available. */
10288 : 2279 : int prec = TYPE_PRECISION (TREE_TYPE (value)) + 1;
10289 : 2279 : bool unsignedp = TYPE_UNSIGNED (TREE_TYPE (value));
10290 : 4558 : tree new_type = (unsignedp
10291 : 2279 : ? long_unsigned_type_node
10292 : : : long_integer_type_node);
10293 : 2279 : if (prec > TYPE_PRECISION (new_type))
10294 : 1920 : new_type = (unsignedp
10295 : 1920 : ? long_long_unsigned_type_node
10296 : : : long_long_integer_type_node);
10297 : 2279 : if (prec > TYPE_PRECISION (new_type))
10298 : 1546 : new_type = (unsignedp
10299 : 1546 : ? widest_unsigned_literal_type_node
10300 : : : widest_integer_literal_type_node);
10301 : 2279 : if (prec <= TYPE_PRECISION (new_type))
10302 : : {
10303 : 2274 : the_enum->enum_overflow = false;
10304 : 2274 : the_enum->enum_next_value
10305 : 2274 : = build_binary_op (EXPR_LOC_OR_LOC (value, input_location),
10306 : : PLUS_EXPR, convert (new_type, value),
10307 : : integer_one_node, false);
10308 : 2274 : gcc_assert (!tree_int_cst_lt (the_enum->enum_next_value, value));
10309 : : }
10310 : : }
10311 : :
10312 : : /* Now create a declaration for the enum value name. */
10313 : :
10314 : 5348275 : decl = build_decl (decl_loc, CONST_DECL, name, TREE_TYPE (value));
10315 : 5348275 : DECL_INITIAL (decl) = value;
10316 : 5348275 : DECL_CONTEXT (decl) = the_enum->enum_type;
10317 : 5348275 : pushdecl (decl);
10318 : :
10319 : 5348275 : return tree_cons (decl, value, NULL_TREE);
10320 : : }
10321 : :
10322 : : /* Implement LANG_HOOKS_SIMULATE_ENUM_DECL. */
10323 : :
10324 : : tree
10325 : 0 : c_simulate_enum_decl (location_t loc, const char *name,
10326 : : vec<string_int_pair> *values_ptr)
10327 : : {
10328 : 0 : location_t saved_loc = input_location;
10329 : 0 : input_location = loc;
10330 : :
10331 : 0 : struct c_enum_contents the_enum;
10332 : 0 : tree enumtype = start_enum (loc, &the_enum, get_identifier (name),
10333 : : NULL_TREE, false);
10334 : :
10335 : 0 : tree value_chain = NULL_TREE;
10336 : 0 : string_int_pair *value;
10337 : 0 : vec<string_int_pair> values = *values_ptr;
10338 : 0 : unsigned int i;
10339 : 0 : FOR_EACH_VEC_ELT (values, i, value)
10340 : : {
10341 : 0 : tree decl = build_enumerator (loc, loc, &the_enum,
10342 : : get_identifier (value->first),
10343 : : build_int_cst (integer_type_node,
10344 : 0 : value->second));
10345 : 0 : TREE_CHAIN (decl) = value_chain;
10346 : 0 : value_chain = decl;
10347 : : }
10348 : :
10349 : 0 : finish_enum (enumtype, nreverse (value_chain), NULL_TREE);
10350 : :
10351 : 0 : input_location = saved_loc;
10352 : 0 : return enumtype;
10353 : : }
10354 : :
10355 : : /* Implement LANG_HOOKS_SIMULATE_RECORD_DECL. */
10356 : :
10357 : : tree
10358 : 0 : c_simulate_record_decl (location_t loc, const char *name,
10359 : : array_slice<const tree> fields)
10360 : : {
10361 : 0 : location_t saved_loc = input_location;
10362 : 0 : input_location = loc;
10363 : :
10364 : 0 : class c_struct_parse_info *struct_info;
10365 : 0 : tree ident = get_identifier (name);
10366 : 0 : tree type = start_struct (loc, RECORD_TYPE, ident, &struct_info);
10367 : :
10368 : 0 : for (unsigned int i = 0; i < fields.size (); ++i)
10369 : : {
10370 : 0 : DECL_FIELD_CONTEXT (fields[i]) = type;
10371 : 0 : if (i > 0)
10372 : 0 : DECL_CHAIN (fields[i - 1]) = fields[i];
10373 : : }
10374 : :
10375 : 0 : finish_struct (loc, type, fields[0], NULL_TREE, struct_info);
10376 : :
10377 : 0 : tree decl = build_decl (loc, TYPE_DECL, ident, type);
10378 : 0 : set_underlying_type (decl);
10379 : 0 : lang_hooks.decls.pushdecl (decl);
10380 : :
10381 : 0 : input_location = saved_loc;
10382 : 0 : return type;
10383 : : }
10384 : :
10385 : : /* Create the FUNCTION_DECL for a function definition.
10386 : : DECLSPECS, DECLARATOR and ATTRIBUTES are the parts of
10387 : : the declaration; they describe the function's name and the type it returns,
10388 : : but twisted together in a fashion that parallels the syntax of C.
10389 : :
10390 : : This function creates a binding context for the function body
10391 : : as well as setting up the FUNCTION_DECL in current_function_decl.
10392 : :
10393 : : Returns true on success. If the DECLARATOR is not suitable for a function
10394 : : (it defines a datum instead), we return false to report a parse error. */
10395 : :
10396 : : bool
10397 : 31761938 : start_function (struct c_declspecs *declspecs, struct c_declarator *declarator,
10398 : : tree attributes)
10399 : : {
10400 : 31761938 : tree decl1, old_decl;
10401 : 31761938 : tree restype, resdecl;
10402 : 31761938 : location_t loc;
10403 : 31761938 : location_t result_loc;
10404 : 31761938 : tree expr = NULL;
10405 : :
10406 : 31761938 : current_function_returns_value = 0; /* Assume, until we see it does. */
10407 : 31761938 : current_function_returns_null = 0;
10408 : 31761938 : current_function_returns_abnormally = 0;
10409 : 31761938 : warn_about_return_type = 0;
10410 : 31761938 : c_switch_stack = NULL;
10411 : :
10412 : : /* Indicate no valid break/continue context. */
10413 : 31761938 : in_statement = 0;
10414 : :
10415 : 31761938 : decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, true, NULL,
10416 : : &attributes, &expr, NULL, DEPRECATED_NORMAL);
10417 : 31761938 : invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION, decl1);
10418 : :
10419 : : /* If the declarator is not suitable for a function definition,
10420 : : cause a syntax error. */
10421 : 31761938 : if (decl1 == NULL_TREE
10422 : 31761907 : || TREE_CODE (decl1) != FUNCTION_DECL)
10423 : : return false;
10424 : :
10425 : : /* Nested functions may have variably modified (return) type.
10426 : : Make sure the size expression is evaluated at this point. */
10427 : 31761900 : if (expr && !current_scope->parm_flag)
10428 : 6 : add_stmt (fold_convert (void_type_node, expr));
10429 : :
10430 : 31761900 : loc = DECL_SOURCE_LOCATION (decl1);
10431 : :
10432 : : /* A nested function is not global. */
10433 : 31761900 : if (current_function_decl != NULL_TREE)
10434 : 1511 : TREE_PUBLIC (decl1) = 0;
10435 : :
10436 : 31761900 : c_decl_attributes (&decl1, attributes, 0);
10437 : :
10438 : 31761900 : if (DECL_DECLARED_INLINE_P (decl1)
10439 : 31105399 : && DECL_UNINLINABLE (decl1)
10440 : 31761910 : && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl1)))
10441 : 3 : warning_at (loc, OPT_Wattributes,
10442 : : "inline function %qD given attribute %qs",
10443 : : decl1, "noinline");
10444 : :
10445 : : /* Handle gnu_inline attribute. */
10446 : 31761900 : if (declspecs->inline_p
10447 : 31105402 : && !flag_gnu89_inline
10448 : 31094750 : && TREE_CODE (decl1) == FUNCTION_DECL
10449 : 62856650 : && (lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (decl1))
10450 : 149583 : || current_function_decl))
10451 : : {
10452 : 30945239 : if (declspecs->storage_class != csc_static)
10453 : 30945233 : DECL_EXTERNAL (decl1) = !DECL_EXTERNAL (decl1);
10454 : : }
10455 : :
10456 : 31761900 : announce_function (decl1);
10457 : :
10458 : 31761900 : if (!COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (TREE_TYPE (decl1))))
10459 : : {
10460 : 1 : error_at (loc, "return type is an incomplete type");
10461 : : /* Make it return void instead. */
10462 : 1 : TREE_TYPE (decl1)
10463 : 2 : = build_function_type (void_type_node,
10464 : 1 : TYPE_ARG_TYPES (TREE_TYPE (decl1)),
10465 : 1 : TYPE_NO_NAMED_ARGS_STDARG_P (TREE_TYPE (decl1)));
10466 : : }
10467 : :
10468 : 31761900 : if (warn_about_return_type)
10469 : 1404 : permerror_opt (loc, flag_isoc99 ? OPT_Wimplicit_int
10470 : 0 : : (warn_return_type > 0 ? OPT_Wreturn_type
10471 : : : OPT_Wimplicit_int),
10472 : : "return type defaults to %<int%>");
10473 : :
10474 : : /* Make the init_value nonzero so pushdecl knows this is not tentative.
10475 : : error_mark_node is replaced below (in pop_scope) with the BLOCK. */
10476 : 31761900 : DECL_INITIAL (decl1) = error_mark_node;
10477 : :
10478 : : /* If this definition isn't a prototype and we had a prototype declaration
10479 : : before, copy the arg type info from that prototype. */
10480 : 31761900 : old_decl = lookup_name_in_scope (DECL_NAME (decl1), current_scope);
10481 : 31761900 : if (old_decl && TREE_CODE (old_decl) != FUNCTION_DECL)
10482 : 31546520 : old_decl = NULL_TREE;
10483 : :
10484 : 31761900 : current_function_prototype_locus = UNKNOWN_LOCATION;
10485 : 31761900 : current_function_prototype_built_in = false;
10486 : 31761900 : current_function_prototype_arg_types = NULL_TREE;
10487 : 31761900 : tree newtype = TREE_TYPE (decl1);
10488 : 31761900 : tree oldtype = old_decl ? TREE_TYPE (old_decl) : newtype;
10489 : 31761900 : if (!prototype_p (newtype))
10490 : : {
10491 : 61147 : tree oldrt = TREE_TYPE (oldtype);
10492 : 61147 : tree newrt = TREE_TYPE (newtype);
10493 : 61147 : if (old_decl != NULL_TREE
10494 : 5115 : && TREE_CODE (oldtype) == FUNCTION_TYPE
10495 : 66262 : && comptypes (oldrt, newrt))
10496 : : {
10497 : 5097 : if (stdarg_p (oldtype))
10498 : : {
10499 : 1 : auto_diagnostic_group d;
10500 : 1 : warning_at (loc, 0, "%q+D defined as variadic function "
10501 : : "without prototype", decl1);
10502 : 1 : locate_old_decl (old_decl);
10503 : 1 : }
10504 : 5097 : TREE_TYPE (decl1) = composite_type (oldtype, newtype);
10505 : 5097 : current_function_prototype_locus = DECL_SOURCE_LOCATION (old_decl);
10506 : 5097 : current_function_prototype_built_in
10507 : 5097 : = C_DECL_BUILTIN_PROTOTYPE (old_decl);
10508 : 5097 : current_function_prototype_arg_types
10509 : 5097 : = TYPE_ARG_TYPES (newtype);
10510 : : }
10511 : 61147 : if (TREE_PUBLIC (decl1))
10512 : : {
10513 : : /* If there is an external prototype declaration of this
10514 : : function, record its location but do not copy information
10515 : : to this decl. This may be an invisible declaration
10516 : : (built-in or in a scope which has finished) or simply
10517 : : have more refined argument types than any declaration
10518 : : found above. */
10519 : 58980 : struct c_binding *b;
10520 : 63841 : for (b = I_SYMBOL_BINDING (DECL_NAME (decl1)); b; b = b->shadowed)
10521 : 9766 : if (B_IN_SCOPE (b, external_scope))
10522 : : break;
10523 : 58980 : if (b)
10524 : : {
10525 : 4905 : tree ext_decl, ext_type;
10526 : 4905 : ext_decl = b->decl;
10527 : 4905 : ext_type = b->u.type ? b->u.type : TREE_TYPE (ext_decl);
10528 : 4905 : if (TREE_CODE (ext_type) == FUNCTION_TYPE
10529 : 9809 : && comptypes (TREE_TYPE (TREE_TYPE (decl1)),
10530 : 4904 : TREE_TYPE (ext_type)))
10531 : : {
10532 : 4885 : current_function_prototype_locus
10533 : 4885 : = DECL_SOURCE_LOCATION (ext_decl);
10534 : 4885 : current_function_prototype_built_in
10535 : 4885 : = C_DECL_BUILTIN_PROTOTYPE (ext_decl);
10536 : 4885 : current_function_prototype_arg_types
10537 : 4885 : = TYPE_ARG_TYPES (ext_type);
10538 : : }
10539 : : }
10540 : : }
10541 : : }
10542 : :
10543 : : /* Optionally warn of old-fashioned def with no previous prototype. */
10544 : 31761900 : if (warn_strict_prototypes
10545 : 96455 : && old_decl != error_mark_node
10546 : 96455 : && !prototype_p (TREE_TYPE (decl1))
10547 : 31761903 : && C_DECL_ISNT_PROTOTYPE (old_decl))
10548 : 3 : warning_at (loc, OPT_Wstrict_prototypes,
10549 : : "function declaration isn%'t a prototype");
10550 : : /* Optionally warn of any global def with no previous prototype. */
10551 : 31761897 : else if (warn_missing_prototypes
10552 : 96156 : && old_decl != error_mark_node
10553 : 96156 : && TREE_PUBLIC (decl1)
10554 : 65562 : && !MAIN_NAME_P (DECL_NAME (decl1))
10555 : 65527 : && C_DECL_ISNT_PROTOTYPE (old_decl)
10556 : 31762538 : && !DECL_DECLARED_INLINE_P (decl1))
10557 : 4 : warning_at (loc, OPT_Wmissing_prototypes,
10558 : : "no previous prototype for %qD", decl1);
10559 : : /* Optionally warn of any def with no previous prototype
10560 : : if the function has already been used. */
10561 : 31761893 : else if (warn_missing_prototypes
10562 : 96152 : && old_decl != NULL_TREE
10563 : 65869 : && old_decl != error_mark_node
10564 : 65869 : && TREE_USED (old_decl)
10565 : 31768123 : && !prototype_p (TREE_TYPE (old_decl)))
10566 : 0 : warning_at (loc, OPT_Wmissing_prototypes,
10567 : : "%qD was used with no prototype before its definition", decl1);
10568 : : /* Optionally warn of any global def with no previous declaration. */
10569 : 31761893 : else if (warn_missing_declarations
10570 : 4 : && TREE_PUBLIC (decl1)
10571 : 3 : && old_decl == NULL_TREE
10572 : 3 : && !MAIN_NAME_P (DECL_NAME (decl1))
10573 : 31761896 : && !DECL_DECLARED_INLINE_P (decl1))
10574 : 2 : warning_at (loc, OPT_Wmissing_declarations,
10575 : : "no previous declaration for %qD",
10576 : : decl1);
10577 : : /* Optionally warn of any def with no previous declaration
10578 : : if the function has already been used. */
10579 : 31761891 : else if (warn_missing_declarations
10580 : 2 : && old_decl != NULL_TREE
10581 : 0 : && old_decl != error_mark_node
10582 : 0 : && TREE_USED (old_decl)
10583 : 31761891 : && C_DECL_IMPLICIT (old_decl))
10584 : 0 : warning_at (loc, OPT_Wmissing_declarations,
10585 : : "%qD was used with no declaration before its definition", decl1);
10586 : :
10587 : : /* This function exists in static storage.
10588 : : (This does not mean `static' in the C sense!) */
10589 : 31761900 : TREE_STATIC (decl1) = 1;
10590 : :
10591 : : /* This is the earliest point at which we might know the assembler
10592 : : name of the function. Thus, if it's set before this, die horribly. */
10593 : 31761900 : gcc_assert (!DECL_ASSEMBLER_NAME_SET_P (decl1));
10594 : :
10595 : : /* If #pragma weak was used, mark the decl weak now. */
10596 : 31761900 : if (current_scope == file_scope)
10597 : 31760389 : maybe_apply_pragma_weak (decl1);
10598 : :
10599 : : /* Warn for unlikely, improbable, or stupid declarations of `main'. */
10600 : 31761900 : if (warn_main && MAIN_NAME_P (DECL_NAME (decl1)))
10601 : : {
10602 : 3101 : if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (decl1)))
10603 : 3101 : != integer_type_node)
10604 : 5 : pedwarn (loc, OPT_Wmain, "return type of %qD is not %<int%>", decl1);
10605 : 3096 : else if (TYPE_ATOMIC (TREE_TYPE (TREE_TYPE (decl1))))
10606 : 1 : pedwarn (loc, OPT_Wmain, "%<_Atomic%>-qualified return type of %qD",
10607 : : decl1);
10608 : :
10609 : 3101 : check_main_parameter_types (decl1);
10610 : :
10611 : 3101 : if (!TREE_PUBLIC (decl1))
10612 : 0 : pedwarn (loc, OPT_Wmain,
10613 : : "%qD is normally a non-static function", decl1);
10614 : : }
10615 : :
10616 : 31761900 : tree parms = current_function_arg_info->parms;
10617 : 31761900 : if (old_decl)
10618 : : {
10619 : 215380 : location_t origloc = DECL_SOURCE_LOCATION (old_decl);
10620 : 215380 : warn_parm_array_mismatch (origloc, old_decl, parms);
10621 : : }
10622 : :
10623 : : /* Record the decl so that the function name is defined.
10624 : : If we already have a decl for this name, and it is a FUNCTION_DECL,
10625 : : use the old decl. */
10626 : :
10627 : 31761900 : current_function_decl = pushdecl (decl1);
10628 : :
10629 : 31761900 : if (tree access = build_attr_access_from_parms (parms, false))
10630 : 55432 : decl_attributes (¤t_function_decl, access, ATTR_FLAG_INTERNAL,
10631 : : old_decl);
10632 : :
10633 : 31761900 : push_scope ();
10634 : 31761900 : declare_parm_level ();
10635 : :
10636 : : /* Set the result decl source location to the location of the typespec. */
10637 : 63523800 : result_loc = (declspecs->locations[cdw_typespec] == UNKNOWN_LOCATION
10638 : 31761900 : ? loc : declspecs->locations[cdw_typespec]);
10639 : 31761900 : restype = TREE_TYPE (TREE_TYPE (current_function_decl));
10640 : 31761900 : resdecl = build_decl (result_loc, RESULT_DECL, NULL_TREE, restype);
10641 : 31761900 : DECL_ARTIFICIAL (resdecl) = 1;
10642 : 31761900 : DECL_IGNORED_P (resdecl) = 1;
10643 : 31761900 : DECL_RESULT (current_function_decl) = resdecl;
10644 : :
10645 : 31761900 : start_fname_decls ();
10646 : :
10647 : 31761900 : return true;
10648 : : }
10649 : :
10650 : : /* Subroutine of store_parm_decls which handles new-style function
10651 : : definitions (prototype format). The parms already have decls, so we
10652 : : need only record them as in effect and complain if any redundant
10653 : : old-style parm decls were written. */
10654 : : static void
10655 : 31700780 : store_parm_decls_newstyle (tree fndecl, const struct c_arg_info *arg_info)
10656 : : {
10657 : 31700780 : tree decl;
10658 : 31700780 : c_arg_tag *tag;
10659 : 31700780 : unsigned ix;
10660 : :
10661 : 31700780 : if (current_scope->bindings)
10662 : : {
10663 : 7 : error_at (DECL_SOURCE_LOCATION (fndecl),
10664 : : "old-style parameter declarations in prototyped "
10665 : : "function definition");
10666 : :
10667 : : /* Get rid of the old-style declarations. */
10668 : 7 : pop_scope ();
10669 : 7 : push_scope ();
10670 : : }
10671 : : /* Don't issue this warning for nested functions, and don't issue this
10672 : : warning if we got here because ARG_INFO_TYPES was error_mark_node
10673 : : (this happens when a function definition has just an ellipsis in
10674 : : its parameter list). */
10675 : 31700773 : else if (!in_system_header_at (input_location)
10676 : 561670 : && !current_function_scope
10677 : 32261336 : && arg_info->types != error_mark_node)
10678 : 560563 : warning_at (DECL_SOURCE_LOCATION (fndecl), OPT_Wtraditional,
10679 : : "traditional C rejects ISO C style function definitions");
10680 : :
10681 : : /* Now make all the parameter declarations visible in the function body.
10682 : : We can bypass most of the grunt work of pushdecl. */
10683 : 119565684 : for (decl = arg_info->parms; decl; decl = DECL_CHAIN (decl))
10684 : : {
10685 : 87864904 : DECL_CONTEXT (decl) = current_function_decl;
10686 : 87864904 : if (DECL_NAME (decl))
10687 : : {
10688 : 87864399 : bind (DECL_NAME (decl), decl, current_scope,
10689 : : /*invisible=*/false, /*nested=*/false,
10690 : : UNKNOWN_LOCATION);
10691 : 87864399 : if (!TREE_USED (decl))
10692 : 87847215 : warn_if_shadowing (decl);
10693 : : }
10694 : : else
10695 : 505 : pedwarn_c11 (DECL_SOURCE_LOCATION (decl), OPT_Wpedantic,
10696 : : "ISO C does not support omitting parameter names in "
10697 : : "function definitions before C23");
10698 : : }
10699 : :
10700 : : /* Record the parameter list in the function declaration. */
10701 : 31700780 : DECL_ARGUMENTS (fndecl) = arg_info->parms;
10702 : :
10703 : : /* Now make all the ancillary declarations visible, likewise. */
10704 : 31700834 : for (decl = arg_info->others; decl; decl = DECL_CHAIN (decl))
10705 : : {
10706 : 54 : DECL_CONTEXT (decl) = current_function_decl;
10707 : 54 : if (DECL_NAME (decl))
10708 : 0 : bind (DECL_NAME (decl), decl, current_scope,
10709 : : /*invisible=*/false,
10710 : 0 : /*nested=*/(TREE_CODE (decl) == FUNCTION_DECL),
10711 : : UNKNOWN_LOCATION);
10712 : : }
10713 : :
10714 : : /* And all the tag declarations. */
10715 : 31700886 : FOR_EACH_VEC_SAFE_ELT_REVERSE (arg_info->tags, ix, tag)
10716 : 54 : if (tag->id)
10717 : 21 : bind (tag->id, tag->type, current_scope,
10718 : : /*invisible=*/false, /*nested=*/false, UNKNOWN_LOCATION);
10719 : 31700780 : }
10720 : :
10721 : : /* Subroutine of store_parm_decls which handles old-style function
10722 : : definitions (separate parameter list and declarations). */
10723 : :
10724 : : static void
10725 : 61120 : store_parm_decls_oldstyle (tree fndecl, const struct c_arg_info *arg_info)
10726 : : {
10727 : 61120 : struct c_binding *b;
10728 : 61120 : tree parm, decl, last;
10729 : 61120 : tree parmids = arg_info->parms;
10730 : 61120 : hash_set<tree> seen_args;
10731 : :
10732 : 61120 : if (!in_system_header_at (input_location))
10733 : : {
10734 : 61113 : if (flag_isoc23)
10735 : 5 : pedwarn (DECL_SOURCE_LOCATION (fndecl),
10736 : : OPT_Wold_style_definition, "old-style function definition");
10737 : : else
10738 : 61108 : warning_at (DECL_SOURCE_LOCATION (fndecl),
10739 : : OPT_Wold_style_definition,
10740 : : "old-style function definition");
10741 : : }
10742 : :
10743 : 61120 : if (current_scope->had_vla_unspec)
10744 : 1 : error ("%<[*]%> not allowed in other than function prototype scope");
10745 : :
10746 : : /* Match each formal parameter name with its declaration. Save each
10747 : : decl in the appropriate TREE_PURPOSE slot of the parmids chain. */
10748 : 95439 : for (parm = parmids; parm; parm = TREE_CHAIN (parm))
10749 : : {
10750 : 34319 : if (TREE_VALUE (parm) == NULL_TREE)
10751 : : {
10752 : 0 : error_at (DECL_SOURCE_LOCATION (fndecl),
10753 : : "parameter name missing from parameter list");
10754 : 0 : TREE_PURPOSE (parm) = NULL_TREE;
10755 : 0 : continue;
10756 : : }
10757 : :
10758 : 34319 : b = I_SYMBOL_BINDING (TREE_VALUE (parm));
10759 : 34319 : if (b && B_IN_CURRENT_SCOPE (b))
10760 : : {
10761 : 22702 : decl = b->decl;
10762 : : /* Skip erroneous parameters. */
10763 : 22702 : if (decl == error_mark_node)
10764 : 2 : continue;
10765 : : /* If we got something other than a PARM_DECL it is an error. */
10766 : 22700 : if (TREE_CODE (decl) != PARM_DECL)
10767 : : {
10768 : 7 : error_at (DECL_SOURCE_LOCATION (decl),
10769 : : "%qD declared as a non-parameter", decl);
10770 : 7 : continue;
10771 : : }
10772 : : /* If the declaration is already marked, we have a duplicate
10773 : : name. Complain and ignore the duplicate. */
10774 : 22693 : else if (seen_args.contains (decl))
10775 : : {
10776 : 0 : error_at (DECL_SOURCE_LOCATION (decl),
10777 : : "multiple parameters named %qD", decl);
10778 : 0 : TREE_PURPOSE (parm) = NULL_TREE;
10779 : 0 : continue;
10780 : : }
10781 : : /* If the declaration says "void", complain and turn it into
10782 : : an int. */
10783 : 22693 : else if (VOID_TYPE_P (TREE_TYPE (decl)))
10784 : : {
10785 : 0 : error_at (DECL_SOURCE_LOCATION (decl),
10786 : : "parameter %qD declared with void type", decl);
10787 : 0 : TREE_TYPE (decl) = integer_type_node;
10788 : 0 : DECL_ARG_TYPE (decl) = integer_type_node;
10789 : 0 : layout_decl (decl, 0);
10790 : : }
10791 : 22693 : warn_if_shadowing (decl);
10792 : : }
10793 : : /* If no declaration found, default to int. */
10794 : : else
10795 : : {
10796 : : /* FIXME diagnostics: This should be the location of the argument,
10797 : : not the FNDECL. E.g., for an old-style declaration
10798 : :
10799 : : int f10(v) { blah; }
10800 : :
10801 : : We should use the location of the V, not the F10.
10802 : : Unfortunately, the V is an IDENTIFIER_NODE which has no
10803 : : location. In the future we need locations for c_arg_info
10804 : : entries.
10805 : :
10806 : : See gcc.dg/Wshadow-3.c for an example of this problem. */
10807 : 11617 : decl = build_decl (DECL_SOURCE_LOCATION (fndecl),
10808 : 11617 : PARM_DECL, TREE_VALUE (parm), integer_type_node);
10809 : 11617 : DECL_ARG_TYPE (decl) = TREE_TYPE (decl);
10810 : 11617 : pushdecl (decl);
10811 : 11617 : warn_if_shadowing (decl);
10812 : :
10813 : 11617 : if (flag_isoc99)
10814 : 116 : permerror_opt (DECL_SOURCE_LOCATION (decl),
10815 : : OPT_Wimplicit_int, "type of %qD defaults to %<int%>",
10816 : : decl);
10817 : : else
10818 : 11501 : warning_at (DECL_SOURCE_LOCATION (decl),
10819 : : OPT_Wmissing_parameter_type,
10820 : : "type of %qD defaults to %<int%>", decl);
10821 : : }
10822 : :
10823 : 34310 : TREE_PURPOSE (parm) = decl;
10824 : 34310 : seen_args.add (decl);
10825 : : }
10826 : :
10827 : : /* Now examine the parms chain for incomplete declarations
10828 : : and declarations with no corresponding names. */
10829 : :
10830 : 95518 : for (b = current_scope->bindings; b; b = b->prev)
10831 : : {
10832 : 34398 : parm = b->decl;
10833 : 34398 : if (TREE_CODE (parm) != PARM_DECL)
10834 : 79 : continue;
10835 : :
10836 : 34319 : if (TREE_TYPE (parm) != error_mark_node
10837 : 34319 : && !COMPLETE_TYPE_P (TREE_TYPE (parm)))
10838 : : {
10839 : 0 : error_at (DECL_SOURCE_LOCATION (parm),
10840 : : "parameter %qD has incomplete type", parm);
10841 : 0 : TREE_TYPE (parm) = error_mark_node;
10842 : : }
10843 : :
10844 : 34319 : if (!seen_args.contains (parm))
10845 : : {
10846 : 9 : error_at (DECL_SOURCE_LOCATION (parm),
10847 : : "declaration for parameter %qD but no such parameter",
10848 : : parm);
10849 : :
10850 : : /* Pretend the parameter was not missing.
10851 : : This gets us to a standard state and minimizes
10852 : : further error messages. */
10853 : 9 : parmids = chainon (parmids, tree_cons (parm, 0, 0));
10854 : : }
10855 : : }
10856 : :
10857 : : /* Chain the declarations together in the order of the list of
10858 : : names. Store that chain in the function decl, replacing the
10859 : : list of names. Update the current scope to match. */
10860 : 61120 : DECL_ARGUMENTS (fndecl) = NULL_TREE;
10861 : :
10862 : 61128 : for (parm = parmids; parm; parm = TREE_CHAIN (parm))
10863 : 8689 : if (TREE_PURPOSE (parm))
10864 : : break;
10865 : 61120 : if (parm && TREE_PURPOSE (parm))
10866 : : {
10867 : 8681 : last = TREE_PURPOSE (parm);
10868 : 8681 : DECL_ARGUMENTS (fndecl) = last;
10869 : :
10870 : 34320 : for (parm = TREE_CHAIN (parm); parm; parm = TREE_CHAIN (parm))
10871 : 25639 : if (TREE_PURPOSE (parm))
10872 : : {
10873 : 25638 : DECL_CHAIN (last) = TREE_PURPOSE (parm);
10874 : 25639 : last = TREE_PURPOSE (parm);
10875 : : }
10876 : 8681 : DECL_CHAIN (last) = NULL_TREE;
10877 : : }
10878 : :
10879 : : /* If there was a previous prototype,
10880 : : set the DECL_ARG_TYPE of each argument according to
10881 : : the type previously specified, and report any mismatches. */
10882 : :
10883 : 61120 : if (current_function_prototype_arg_types)
10884 : : {
10885 : 416 : tree type;
10886 : 416 : for (parm = DECL_ARGUMENTS (fndecl),
10887 : 416 : type = current_function_prototype_arg_types;
10888 : 662 : parm || (type != NULL_TREE
10889 : 411 : && TREE_VALUE (type) != error_mark_node
10890 : 411 : && TYPE_MAIN_VARIANT (TREE_VALUE (type)) != void_type_node);
10891 : 246 : parm = DECL_CHAIN (parm), type = TREE_CHAIN (type))
10892 : : {
10893 : 267 : if (parm == NULL_TREE
10894 : 250 : || type == NULL_TREE
10895 : 517 : || (TREE_VALUE (type) != error_mark_node
10896 : 236 : && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node))
10897 : : {
10898 : 21 : if (current_function_prototype_built_in)
10899 : 17 : warning_at (DECL_SOURCE_LOCATION (fndecl),
10900 : : 0, "number of arguments doesn%'t match "
10901 : : "built-in prototype");
10902 : : else
10903 : : {
10904 : : /* FIXME diagnostics: This should be the location of
10905 : : FNDECL, but there is bug when a prototype is
10906 : : declared inside function context, but defined
10907 : : outside of it (e.g., gcc.dg/pr15698-2.c). In
10908 : : which case FNDECL gets the location of the
10909 : : prototype, not the definition. */
10910 : 4 : error_at (input_location,
10911 : : "number of arguments doesn%'t match prototype");
10912 : :
10913 : 4 : error_at (current_function_prototype_locus,
10914 : : "prototype declaration");
10915 : : }
10916 : : break;
10917 : : }
10918 : : /* Type for passing arg must be consistent with that
10919 : : declared for the arg. ISO C says we take the unqualified
10920 : : type for parameters declared with qualified type. */
10921 : 246 : if (TREE_TYPE (parm) != error_mark_node
10922 : 245 : && TREE_VALUE (type) != error_mark_node
10923 : 477 : && ((TYPE_ATOMIC (DECL_ARG_TYPE (parm))
10924 : 231 : != TYPE_ATOMIC (TREE_VALUE (type)))
10925 : 229 : || !comptypes (TYPE_MAIN_VARIANT (DECL_ARG_TYPE (parm)),
10926 : 229 : TYPE_MAIN_VARIANT (TREE_VALUE (type)))))
10927 : : {
10928 : 32 : if ((TYPE_ATOMIC (DECL_ARG_TYPE (parm))
10929 : 32 : == TYPE_ATOMIC (TREE_VALUE (type)))
10930 : 32 : && (TYPE_MAIN_VARIANT (TREE_TYPE (parm))
10931 : 30 : == TYPE_MAIN_VARIANT (TREE_VALUE (type))))
10932 : : {
10933 : : /* Adjust argument to match prototype. E.g. a previous
10934 : : `int foo(float);' prototype causes
10935 : : `int foo(x) float x; {...}' to be treated like
10936 : : `int foo(float x) {...}'. This is particularly
10937 : : useful for argument types like uid_t. */
10938 : 14 : DECL_ARG_TYPE (parm) = TREE_TYPE (parm);
10939 : :
10940 : 14 : if (targetm.calls.promote_prototypes (TREE_TYPE (current_function_decl))
10941 : 14 : && INTEGRAL_TYPE_P (TREE_TYPE (parm))
10942 : 14 : && (TYPE_PRECISION (TREE_TYPE (parm))
10943 : 0 : < TYPE_PRECISION (integer_type_node)))
10944 : 0 : DECL_ARG_TYPE (parm)
10945 : 0 : = c_type_promotes_to (TREE_TYPE (parm));
10946 : :
10947 : : /* ??? Is it possible to get here with a
10948 : : built-in prototype or will it always have
10949 : : been diagnosed as conflicting with an
10950 : : old-style definition and discarded? */
10951 : 14 : if (current_function_prototype_built_in)
10952 : 2 : warning_at (DECL_SOURCE_LOCATION (parm),
10953 : : OPT_Wpedantic, "promoted argument %qD "
10954 : : "doesn%'t match built-in prototype", parm);
10955 : : else
10956 : : {
10957 : 12 : pedwarn (DECL_SOURCE_LOCATION (parm),
10958 : : OPT_Wpedantic, "promoted argument %qD "
10959 : : "doesn%'t match prototype", parm);
10960 : 12 : pedwarn (current_function_prototype_locus, OPT_Wpedantic,
10961 : : "prototype declaration");
10962 : : }
10963 : : }
10964 : : else
10965 : : {
10966 : 18 : if (current_function_prototype_built_in)
10967 : 10 : warning_at (DECL_SOURCE_LOCATION (parm),
10968 : : 0, "argument %qD doesn%'t match "
10969 : : "built-in prototype", parm);
10970 : : else
10971 : : {
10972 : 8 : error_at (DECL_SOURCE_LOCATION (parm),
10973 : : "argument %qD doesn%'t match prototype", parm);
10974 : 8 : error_at (current_function_prototype_locus,
10975 : : "prototype declaration");
10976 : : }
10977 : : }
10978 : : }
10979 : : }
10980 : 416 : TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = NULL_TREE;
10981 : : }
10982 : :
10983 : : /* Otherwise, create a prototype that would match. */
10984 : :
10985 : : else
10986 : : {
10987 : 60704 : tree actual = NULL_TREE, last = NULL_TREE, type;
10988 : :
10989 : 94773 : for (parm = DECL_ARGUMENTS (fndecl); parm; parm = DECL_CHAIN (parm))
10990 : : {
10991 : 34069 : type = tree_cons (NULL_TREE, DECL_ARG_TYPE (parm), NULL_TREE);
10992 : 34069 : if (last)
10993 : 25554 : TREE_CHAIN (last) = type;
10994 : : else
10995 : : actual = type;
10996 : 34069 : last = type;
10997 : : }
10998 : 60704 : type = tree_cons (NULL_TREE, void_type_node, NULL_TREE);
10999 : 60704 : if (last)
11000 : 8515 : TREE_CHAIN (last) = type;
11001 : : else
11002 : : actual = type;
11003 : :
11004 : : /* We are going to assign a new value for the TYPE_ACTUAL_ARG_TYPES
11005 : : of the type of this function, but we need to avoid having this
11006 : : affect the types of other similarly-typed functions, so we must
11007 : : first force the generation of an identical (but separate) type
11008 : : node for the relevant function type. The new node we create
11009 : : will be a variant of the main variant of the original function
11010 : : type. */
11011 : :
11012 : 60704 : TREE_TYPE (fndecl) = build_variant_type_copy (TREE_TYPE (fndecl));
11013 : :
11014 : 60704 : TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = actual;
11015 : : }
11016 : 61120 : }
11017 : :
11018 : : /* Store parameter declarations passed in ARG_INFO into the current
11019 : : function declaration. */
11020 : :
11021 : : void
11022 : 0 : store_parm_decls_from (struct c_arg_info *arg_info)
11023 : : {
11024 : 0 : current_function_arg_info = arg_info;
11025 : 0 : store_parm_decls ();
11026 : 0 : }
11027 : :
11028 : : /* Called by walk_tree to look for and update context-less labels
11029 : : or labels with context in the parent function. */
11030 : :
11031 : : static tree
11032 : 8109 : set_labels_context_r (tree *tp, int *walk_subtrees, void *data)
11033 : : {
11034 : 8109 : tree ctx = static_cast<tree>(data);
11035 : 8109 : if (TREE_CODE (*tp) == LABEL_EXPR
11036 : 8109 : && (DECL_CONTEXT (LABEL_EXPR_LABEL (*tp)) == NULL_TREE
11037 : 2 : || DECL_CONTEXT (LABEL_EXPR_LABEL (*tp)) == DECL_CONTEXT (ctx)))
11038 : : {
11039 : 72 : DECL_CONTEXT (LABEL_EXPR_LABEL (*tp)) = ctx;
11040 : 72 : *walk_subtrees = 0;
11041 : : }
11042 : :
11043 : 8109 : return NULL_TREE;
11044 : : }
11045 : :
11046 : : /* Store the parameter declarations into the current function declaration.
11047 : : This is called after parsing the parameter declarations, before
11048 : : digesting the body of the function.
11049 : :
11050 : : For an old-style definition, construct a prototype out of the old-style
11051 : : parameter declarations and inject it into the function's type. */
11052 : :
11053 : : void
11054 : 31761900 : store_parm_decls (void)
11055 : : {
11056 : 31761900 : tree fndecl = current_function_decl;
11057 : 31761900 : bool proto;
11058 : :
11059 : : /* The argument information block for FNDECL. */
11060 : 31761900 : struct c_arg_info *arg_info = current_function_arg_info;
11061 : 31761900 : current_function_arg_info = 0;
11062 : :
11063 : : /* True if this definition is written with a prototype. In C23, an
11064 : : empty argument list was converted to (void) in grokparms; in
11065 : : older C standard versions, it does not give the function a type
11066 : : with a prototype for future calls. */
11067 : 31761900 : proto = arg_info->types != 0 || arg_info->no_named_args_stdarg_p;
11068 : :
11069 : 61120 : if (proto)
11070 : 31700780 : store_parm_decls_newstyle (fndecl, arg_info);
11071 : : else
11072 : 61120 : store_parm_decls_oldstyle (fndecl, arg_info);
11073 : :
11074 : : /* The next call to push_scope will be a function body. */
11075 : :
11076 : 31761900 : next_is_function_body = true;
11077 : :
11078 : : /* Write a record describing this function definition to the prototypes
11079 : : file (if requested). */
11080 : :
11081 : 31761900 : gen_aux_info_record (fndecl, 1, 0, proto);
11082 : :
11083 : : /* Initialize the RTL code for the function. */
11084 : 31761900 : allocate_struct_function (fndecl, false);
11085 : :
11086 : 31761900 : if (warn_unused_local_typedefs)
11087 : 2804436 : cfun->language = ggc_cleared_alloc<language_function> ();
11088 : :
11089 : : /* Begin the statement tree for this function. */
11090 : 31761900 : DECL_SAVED_TREE (fndecl) = push_stmt_list ();
11091 : :
11092 : : /* ??? Insert the contents of the pending sizes list into the function
11093 : : to be evaluated. The only reason left to have this is
11094 : : void foo(int n, int array[n++])
11095 : : because we throw away the array type in favor of a pointer type, and
11096 : : thus won't naturally see the SAVE_EXPR containing the increment. All
11097 : : other pending sizes would be handled by gimplify_parameters. */
11098 : 31761900 : if (arg_info->pending_sizes)
11099 : : {
11100 : : /* In very special circumstances, e.g. for code like
11101 : : _Atomic int i = 5;
11102 : : void f (int a[i += 2]) {}
11103 : : we need to execute the atomic assignment on function entry.
11104 : : But in this case, it is not just a straight store, it has the
11105 : : op= form, which means that build_atomic_assign has generated
11106 : : gotos, labels, etc. Because at that time the function decl
11107 : : for F has not been created yet, those labels do not have any
11108 : : function context. But we have the fndecl now, so update the
11109 : : labels accordingly. gimplify_expr would crash otherwise.
11110 : : Or with nested functions the labels could be created with parent
11111 : : function's context, while when the statement is emitted at the
11112 : : start of the nested function, it needs the nested function's
11113 : : context. */
11114 : 292 : walk_tree_without_duplicates (&arg_info->pending_sizes,
11115 : : set_labels_context_r, fndecl);
11116 : 292 : add_stmt (arg_info->pending_sizes);
11117 : : }
11118 : 31761900 : }
11119 : :
11120 : : /* Store PARM_DECLs in PARMS into scope temporarily. Used for
11121 : : c_finish_omp_declare_simd for function prototypes. No diagnostics
11122 : : should be done. */
11123 : :
11124 : : void
11125 : 187 : temp_store_parm_decls (tree fndecl, tree parms)
11126 : : {
11127 : 187 : push_scope ();
11128 : 537 : for (tree p = parms; p; p = DECL_CHAIN (p))
11129 : : {
11130 : 350 : DECL_CONTEXT (p) = fndecl;
11131 : 350 : if (DECL_NAME (p))
11132 : 246 : bind (DECL_NAME (p), p, current_scope,
11133 : : /*invisible=*/false, /*nested=*/false,
11134 : : UNKNOWN_LOCATION);
11135 : : }
11136 : 187 : }
11137 : :
11138 : : /* Undo what temp_store_parm_decls did. */
11139 : :
11140 : : void
11141 : 187 : temp_pop_parm_decls (void)
11142 : : {
11143 : : /* Clear all bindings in this temporary scope, so that
11144 : : pop_scope doesn't create a BLOCK. */
11145 : 187 : struct c_binding *b = current_scope->bindings;
11146 : 187 : current_scope->bindings = NULL;
11147 : 435 : for (; b; b = free_binding_and_advance (b))
11148 : : {
11149 : 248 : gcc_assert (TREE_CODE (b->decl) == PARM_DECL
11150 : : || b->decl == error_mark_node);
11151 : 248 : gcc_assert (I_SYMBOL_BINDING (b->id) == b);
11152 : 248 : I_SYMBOL_BINDING (b->id) = b->shadowed;
11153 : 248 : if (b->shadowed && b->shadowed->u.type)
11154 : 0 : TREE_TYPE (b->shadowed->decl) = b->shadowed->u.type;
11155 : : }
11156 : 187 : pop_scope ();
11157 : 187 : }
11158 : :
11159 : :
11160 : : /* Finish up a function declaration and compile that function
11161 : : all the way to assembler language output. Then free the storage
11162 : : for the function definition.
11163 : :
11164 : : This is called after parsing the body of the function definition. */
11165 : :
11166 : : void
11167 : 31761898 : finish_function (location_t end_loc)
11168 : : {
11169 : 31761898 : tree fndecl = current_function_decl;
11170 : :
11171 : 31761898 : if (c_dialect_objc ())
11172 : 0 : objc_finish_function ();
11173 : :
11174 : 31761898 : if (TREE_CODE (fndecl) == FUNCTION_DECL
11175 : 31761898 : && targetm.calls.promote_prototypes (TREE_TYPE (fndecl)))
11176 : : {
11177 : 31761898 : tree args = DECL_ARGUMENTS (fndecl);
11178 : 119661119 : for (; args; args = DECL_CHAIN (args))
11179 : : {
11180 : 87899221 : tree type = TREE_TYPE (args);
11181 : 87899221 : if (INTEGRAL_TYPE_P (type)
11182 : 87899221 : && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
11183 : 16355303 : DECL_ARG_TYPE (args) = c_type_promotes_to (type);
11184 : : }
11185 : : }
11186 : :
11187 : 31761898 : if (DECL_INITIAL (fndecl) && DECL_INITIAL (fndecl) != error_mark_node)
11188 : 31761898 : BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11189 : :
11190 : : /* Must mark the RESULT_DECL as being in this function. */
11191 : :
11192 : 31761898 : if (DECL_RESULT (fndecl) && DECL_RESULT (fndecl) != error_mark_node)
11193 : 31761898 : DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11194 : :
11195 : 31808933 : if (MAIN_NAME_P (DECL_NAME (fndecl)) && !TREE_THIS_VOLATILE (fndecl)
11196 : 47034 : && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (fndecl)))
11197 : 31808932 : == integer_type_node && flag_isoc99)
11198 : : {
11199 : : /* Hack. We don't want the middle-end to warn that this return
11200 : : is unreachable, so we mark its location as special. Using
11201 : : UNKNOWN_LOCATION has the problem that it gets clobbered in
11202 : : annotate_one_with_locus. A cleaner solution might be to
11203 : : ensure ! should_carry_locus_p (stmt), but that needs a flag.
11204 : : */
11205 : 45690 : c_finish_return (BUILTINS_LOCATION, integer_zero_node, NULL_TREE);
11206 : : }
11207 : :
11208 : : /* Tie off the statement tree for this function. */
11209 : 31761898 : DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11210 : :
11211 : 31761898 : finish_fname_decls ();
11212 : :
11213 : : /* Complain if there's no return statement only if option specified on
11214 : : command line. */
11215 : 31761898 : if (warn_return_type > 0
11216 : 2804462 : && TREE_CODE (TREE_TYPE (TREE_TYPE (fndecl))) != VOID_TYPE
11217 : 2605955 : && !current_function_returns_value && !current_function_returns_null
11218 : : /* Don't complain if we are no-return. */
11219 : 72 : && !current_function_returns_abnormally
11220 : : /* Don't complain if we are declared noreturn. */
11221 : 21 : && !TREE_THIS_VOLATILE (fndecl)
11222 : : /* Don't warn for main(). */
11223 : 18 : && !MAIN_NAME_P (DECL_NAME (fndecl))
11224 : : /* Or if they didn't actually specify a return type. */
11225 : 17 : && !C_FUNCTION_IMPLICIT_INT (fndecl)
11226 : : /* Normally, with -Wreturn-type, flow will complain, but we might
11227 : : optimize out static functions. */
11228 : 17 : && !TREE_PUBLIC (fndecl)
11229 : 6 : && targetm.warn_func_return (fndecl)
11230 : 31761903 : && warning (OPT_Wreturn_type,
11231 : : "no return statement in function returning non-void"))
11232 : 5 : suppress_warning (fndecl, OPT_Wreturn_type);
11233 : :
11234 : : /* Complain about parameters that are only set, but never otherwise used. */
11235 : 31761898 : if (warn_unused_but_set_parameter)
11236 : : {
11237 : 2759554 : tree decl;
11238 : :
11239 : 2759554 : for (decl = DECL_ARGUMENTS (fndecl);
11240 : 10351895 : decl;
11241 : 7592341 : decl = DECL_CHAIN (decl))
11242 : 7592341 : if (TREE_USED (decl)
11243 : 7592341 : && TREE_CODE (decl) == PARM_DECL
11244 : 7531640 : && !DECL_READ_P (decl)
11245 : 1 : && DECL_NAME (decl)
11246 : 1 : && !DECL_ARTIFICIAL (decl)
11247 : 7592342 : && !warning_suppressed_p (decl, OPT_Wunused_but_set_parameter))
11248 : 1 : warning_at (DECL_SOURCE_LOCATION (decl),
11249 : : OPT_Wunused_but_set_parameter,
11250 : : "parameter %qD set but not used", decl);
11251 : : }
11252 : :
11253 : : /* Complain about locally defined typedefs that are not used in this
11254 : : function. */
11255 : 31761898 : maybe_warn_unused_local_typedefs ();
11256 : :
11257 : : /* Possibly warn about unused parameters. */
11258 : 31761898 : if (warn_unused_parameter)
11259 : 2665673 : do_warn_unused_parameter (fndecl);
11260 : :
11261 : : /* Store the end of the function, so that we get good line number
11262 : : info for the epilogue. */
11263 : 31761898 : cfun->function_end_locus = end_loc;
11264 : :
11265 : : /* Finalize the ELF visibility for the function. */
11266 : 31761898 : c_determine_visibility (fndecl);
11267 : :
11268 : : /* For GNU C extern inline functions disregard inline limits. */
11269 : 31761898 : if (DECL_EXTERNAL (fndecl)
11270 : 30953445 : && DECL_DECLARED_INLINE_P (fndecl)
11271 : 62715340 : && (flag_gnu89_inline
11272 : 30945609 : || lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (fndecl))))
11273 : 30952978 : DECL_DISREGARD_INLINE_LIMITS (fndecl) = 1;
11274 : :
11275 : : /* Genericize before inlining. Delay genericizing nested functions
11276 : : until their parent function is genericized. Since finalizing
11277 : : requires GENERIC, delay that as well. */
11278 : :
11279 : 63523796 : if (DECL_INITIAL (fndecl) && DECL_INITIAL (fndecl) != error_mark_node
11280 : 63523796 : && !undef_nested_function)
11281 : : {
11282 : 31761893 : if (!decl_function_context (fndecl))
11283 : : {
11284 : 31760382 : invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
11285 : 31760382 : c_genericize (fndecl);
11286 : :
11287 : : /* ??? Objc emits functions after finalizing the compilation unit.
11288 : : This should be cleaned up later and this conditional removed. */
11289 : 31760382 : if (symtab->global_info_ready)
11290 : : {
11291 : 0 : cgraph_node::add_new_function (fndecl, false);
11292 : 0 : return;
11293 : : }
11294 : 31760382 : cgraph_node::finalize_function (fndecl, false);
11295 : : }
11296 : : else
11297 : : {
11298 : : /* Register this function with cgraph just far enough to get it
11299 : : added to our parent's nested function list. Handy, since the
11300 : : C front end doesn't have such a list. */
11301 : 1511 : (void) cgraph_node::get_create (fndecl);
11302 : : }
11303 : : }
11304 : :
11305 : 31761898 : if (!decl_function_context (fndecl))
11306 : 31760387 : undef_nested_function = false;
11307 : :
11308 : 31761898 : if (cfun->language != NULL)
11309 : : {
11310 : 2804435 : ggc_free (cfun->language);
11311 : 2804435 : cfun->language = NULL;
11312 : : }
11313 : :
11314 : : /* We're leaving the context of this function, so zap cfun.
11315 : : It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
11316 : : tree_rest_of_compilation. */
11317 : 31761898 : set_cfun (NULL);
11318 : 31761898 : invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION, current_function_decl);
11319 : 31761898 : current_function_decl = NULL;
11320 : : }
11321 : :
11322 : : /* Check the declarations given in a for-loop for satisfying the C99
11323 : : constraints. If exactly one such decl is found, return it. LOC is
11324 : : the location of the opening parenthesis of the for loop. The last
11325 : : parameter allows you to control the "for loop initial declarations
11326 : : are only allowed in C99 mode". Normally, you should pass
11327 : : flag_isoc99 as that parameter. But in some cases (Objective-C
11328 : : foreach loop, for example) we want to run the checks in this
11329 : : function even if not in C99 mode, so we allow the caller to turn
11330 : : off the error about not being in C99 mode.
11331 : : */
11332 : :
11333 : : tree
11334 : 21526 : check_for_loop_decls (location_t loc, bool turn_off_iso_c99_error)
11335 : : {
11336 : 21526 : struct c_binding *b;
11337 : 21526 : tree one_decl = NULL_TREE;
11338 : 21526 : int n_decls = 0;
11339 : :
11340 : 21526 : if (!turn_off_iso_c99_error)
11341 : : {
11342 : 1 : static bool hint = true;
11343 : : /* If we get here, declarations have been used in a for loop without
11344 : : the C99 for loop scope. This doesn't make much sense, so don't
11345 : : allow it. */
11346 : 1 : auto_diagnostic_group d;
11347 : 1 : error_at (loc, "%<for%> loop initial declarations "
11348 : : "are only allowed in C99 or C11 mode");
11349 : 1 : if (hint)
11350 : : {
11351 : 1 : inform (loc,
11352 : : "use option %<-std=c99%>, %<-std=gnu99%>, %<-std=c11%> or "
11353 : : "%<-std=gnu11%> to compile your code");
11354 : 1 : hint = false;
11355 : : }
11356 : 1 : return NULL_TREE;
11357 : 1 : }
11358 : : else
11359 : 21525 : pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not support %<for%> loop "
11360 : : "initial declarations");
11361 : :
11362 : : /* C99 subclause 6.8.5 paragraph 3:
11363 : :
11364 : : [#3] The declaration part of a for statement shall only
11365 : : declare identifiers for objects having storage class auto or
11366 : : register.
11367 : :
11368 : : It isn't clear whether, in this sentence, "identifiers" binds to
11369 : : "shall only declare" or to "objects" - that is, whether all identifiers
11370 : : declared must be identifiers for objects, or whether the restriction
11371 : : only applies to those that are. (A question on this in comp.std.c
11372 : : in November 2000 received no answer.) We implement the strictest
11373 : : interpretation, to avoid creating an extension which later causes
11374 : : problems.
11375 : :
11376 : : This constraint was removed in C23. */
11377 : :
11378 : 43124 : for (b = current_scope->bindings; b; b = b->prev)
11379 : : {
11380 : 21599 : tree id = b->id;
11381 : 21599 : tree decl = b->decl;
11382 : :
11383 : 21599 : if (!id)
11384 : 27 : continue;
11385 : :
11386 : 21572 : switch (TREE_CODE (decl))
11387 : : {
11388 : 21524 : case VAR_DECL:
11389 : 21524 : {
11390 : 21524 : location_t decl_loc = DECL_SOURCE_LOCATION (decl);
11391 : 21524 : if (TREE_STATIC (decl))
11392 : 5 : pedwarn_c11 (decl_loc, OPT_Wpedantic,
11393 : : "declaration of static variable %qD in %<for%> "
11394 : : "loop initial declaration", decl);
11395 : 21519 : else if (DECL_EXTERNAL (decl))
11396 : 5 : pedwarn_c11 (decl_loc, OPT_Wpedantic,
11397 : : "declaration of %<extern%> variable %qD in %<for%> "
11398 : : "loop initial declaration", decl);
11399 : : }
11400 : : break;
11401 : :
11402 : 6 : case RECORD_TYPE:
11403 : 6 : pedwarn_c11 (loc, OPT_Wpedantic,
11404 : : "%<struct %E%> declared in %<for%> loop initial "
11405 : : "declaration", id);
11406 : 6 : break;
11407 : 5 : case UNION_TYPE:
11408 : 5 : pedwarn_c11 (loc, OPT_Wpedantic,
11409 : : "%<union %E%> declared in %<for%> loop initial "
11410 : : "declaration",
11411 : : id);
11412 : 5 : break;
11413 : 5 : case ENUMERAL_TYPE:
11414 : 5 : pedwarn_c11 (loc, OPT_Wpedantic,
11415 : : "%<enum %E%> declared in %<for%> loop "
11416 : : "initial declaration", id);
11417 : 5 : break;
11418 : 32 : default:
11419 : 32 : pedwarn_c11 (loc, OPT_Wpedantic, "declaration of non-variable "
11420 : : "%qD in %<for%> loop initial declaration", decl);
11421 : : }
11422 : :
11423 : 21572 : n_decls++;
11424 : 21572 : one_decl = decl;
11425 : : }
11426 : :
11427 : 21525 : return n_decls == 1 ? one_decl : NULL_TREE;
11428 : : }
11429 : :
11430 : : /* Save and reinitialize the variables
11431 : : used during compilation of a C function. */
11432 : :
11433 : : void
11434 : 1539 : c_push_function_context (void)
11435 : : {
11436 : 1539 : struct language_function *p = cfun->language;
11437 : : /* cfun->language might have been already allocated by the use of
11438 : : -Wunused-local-typedefs. In that case, just re-use it. */
11439 : 1539 : if (p == NULL)
11440 : 1483 : cfun->language = p = ggc_cleared_alloc<language_function> ();
11441 : :
11442 : 1539 : p->base.x_stmt_tree = c_stmt_tree;
11443 : 1539 : c_stmt_tree.x_cur_stmt_list = vec_safe_copy (c_stmt_tree.x_cur_stmt_list);
11444 : 1539 : p->x_in_statement = in_statement;
11445 : 1539 : p->x_switch_stack = c_switch_stack;
11446 : 1539 : p->arg_info = current_function_arg_info;
11447 : 1539 : p->returns_value = current_function_returns_value;
11448 : 1539 : p->returns_null = current_function_returns_null;
11449 : 1539 : p->returns_abnormally = current_function_returns_abnormally;
11450 : 1539 : p->warn_about_return_type = warn_about_return_type;
11451 : :
11452 : 1539 : push_function_context ();
11453 : 1539 : }
11454 : :
11455 : : /* Restore the variables used during compilation of a C function. */
11456 : :
11457 : : void
11458 : 1539 : c_pop_function_context (void)
11459 : : {
11460 : 1539 : struct language_function *p;
11461 : :
11462 : 1539 : pop_function_context ();
11463 : 1539 : p = cfun->language;
11464 : :
11465 : : /* When -Wunused-local-typedefs is in effect, cfun->languages is
11466 : : used to store data throughout the life time of the current cfun,
11467 : : So don't deallocate it. */
11468 : 1539 : if (!warn_unused_local_typedefs)
11469 : 1483 : cfun->language = NULL;
11470 : :
11471 : 1539 : if (DECL_STRUCT_FUNCTION (current_function_decl) == 0
11472 : 1539 : && DECL_SAVED_TREE (current_function_decl) == NULL_TREE)
11473 : : {
11474 : : /* Stop pointing to the local nodes about to be freed. */
11475 : : /* But DECL_INITIAL must remain nonzero so we know this
11476 : : was an actual function definition. */
11477 : 0 : DECL_INITIAL (current_function_decl) = error_mark_node;
11478 : 0 : DECL_ARGUMENTS (current_function_decl) = NULL_TREE;
11479 : : }
11480 : :
11481 : 1539 : c_stmt_tree = p->base.x_stmt_tree;
11482 : 1539 : p->base.x_stmt_tree.x_cur_stmt_list = NULL;
11483 : 1539 : in_statement = p->x_in_statement;
11484 : 1539 : c_switch_stack = p->x_switch_stack;
11485 : 1539 : current_function_arg_info = p->arg_info;
11486 : 1539 : current_function_returns_value = p->returns_value;
11487 : 1539 : current_function_returns_null = p->returns_null;
11488 : 1539 : current_function_returns_abnormally = p->returns_abnormally;
11489 : 1539 : warn_about_return_type = p->warn_about_return_type;
11490 : 1539 : }
11491 : :
11492 : : /* The functions below are required for functionality of doing
11493 : : function at once processing in the C front end. Currently these
11494 : : functions are not called from anywhere in the C front end, but as
11495 : : these changes continue, that will change. */
11496 : :
11497 : : /* Returns the stmt_tree (if any) to which statements are currently
11498 : : being added. If there is no active statement-tree, NULL is
11499 : : returned. */
11500 : :
11501 : : stmt_tree
11502 : 636347725 : current_stmt_tree (void)
11503 : : {
11504 : 636347725 : return &c_stmt_tree;
11505 : : }
11506 : :
11507 : : /* Return the global value of T as a symbol. */
11508 : :
11509 : : tree
11510 : 3813423 : identifier_global_value (tree t)
11511 : : {
11512 : 3813423 : struct c_binding *b;
11513 : :
11514 : 3814388 : for (b = I_SYMBOL_BINDING (t); b; b = b->shadowed)
11515 : 3807179 : if (B_IN_FILE_SCOPE (b) || B_IN_EXTERNAL_SCOPE (b))
11516 : 3806214 : return b->decl;
11517 : :
11518 : : return NULL_TREE;
11519 : : }
11520 : :
11521 : : /* Return the global value of tag T as a symbol. */
11522 : :
11523 : : tree
11524 : 12 : identifier_global_tag (tree t)
11525 : : {
11526 : 12 : struct c_binding *b;
11527 : :
11528 : 12 : for (b = I_TAG_BINDING (t); b; b = b->shadowed)
11529 : 11 : if (B_IN_FILE_SCOPE (b) || B_IN_EXTERNAL_SCOPE (b))
11530 : 11 : return b->decl;
11531 : :
11532 : : return NULL_TREE;
11533 : : }
11534 : :
11535 : : /* Returns true if NAME refers to a built-in function or function-like
11536 : : operator. */
11537 : :
11538 : : bool
11539 : 23598 : names_builtin_p (const char *name)
11540 : : {
11541 : 23598 : tree id = get_identifier (name);
11542 : 23598 : if (tree decl = identifier_global_value (id))
11543 : 23516 : return TREE_CODE (decl) == FUNCTION_DECL && DECL_IS_UNDECLARED_BUILTIN (decl);
11544 : :
11545 : : /* Also detect common reserved C words that aren't strictly built-in
11546 : : functions. */
11547 : 82 : switch (C_RID_CODE (id))
11548 : : {
11549 : : case RID_BUILTIN_ASSOC_BARRIER:
11550 : : case RID_BUILTIN_CONVERTVECTOR:
11551 : : case RID_BUILTIN_HAS_ATTRIBUTE:
11552 : : case RID_BUILTIN_SHUFFLE:
11553 : : case RID_BUILTIN_SHUFFLEVECTOR:
11554 : : case RID_BUILTIN_STDC:
11555 : : case RID_CHOOSE_EXPR:
11556 : : case RID_OFFSETOF:
11557 : : case RID_TYPES_COMPATIBLE_P:
11558 : : return true;
11559 : : default:
11560 : : break;
11561 : : }
11562 : :
11563 : : return false;
11564 : : }
11565 : :
11566 : : /* In C, the only C-linkage public declaration is at file scope. */
11567 : :
11568 : : tree
11569 : 5 : c_linkage_bindings (tree name)
11570 : : {
11571 : 5 : return identifier_global_value (name);
11572 : : }
11573 : :
11574 : : /* Record a builtin type for C. If NAME is non-NULL, it is the name used;
11575 : : otherwise the name is found in ridpointers from RID_INDEX. */
11576 : :
11577 : : void
11578 : 3131362 : record_builtin_type (enum rid rid_index, const char *name, tree type)
11579 : : {
11580 : 3131362 : tree id, decl;
11581 : 3131362 : if (name == 0)
11582 : 1403714 : id = ridpointers[(int) rid_index];
11583 : : else
11584 : 1727648 : id = get_identifier (name);
11585 : 3131362 : decl = build_decl (UNKNOWN_LOCATION, TYPE_DECL, id, type);
11586 : 3131362 : pushdecl (decl);
11587 : 3131362 : if (debug_hooks->type_decl)
11588 : 3131362 : debug_hooks->type_decl (decl, false);
11589 : 3131362 : }
11590 : :
11591 : : /* Return a c_parm structure with the given SPECS, ATTRS and DECLARATOR. */
11592 : :
11593 : : struct c_parm *
11594 : 108486179 : build_c_parm (struct c_declspecs *specs, tree attrs,
11595 : : struct c_declarator *declarator,
11596 : : location_t loc)
11597 : : {
11598 : 108486179 : struct c_parm *ret = XOBNEW (&parser_obstack, struct c_parm);
11599 : 108486179 : ret->specs = specs;
11600 : 108486179 : ret->attrs = attrs;
11601 : 108486179 : ret->declarator = declarator;
11602 : 108486179 : ret->loc = loc;
11603 : 108486179 : return ret;
11604 : : }
11605 : :
11606 : : /* Return a declarator with nested attributes. TARGET is the inner
11607 : : declarator to which these attributes apply. ATTRS are the
11608 : : attributes. */
11609 : :
11610 : : struct c_declarator *
11611 : 6528 : build_attrs_declarator (tree attrs, struct c_declarator *target)
11612 : : {
11613 : 6528 : struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator);
11614 : 6528 : ret->kind = cdk_attrs;
11615 : 6528 : ret->declarator = target;
11616 : 6528 : ret->u.attrs = attrs;
11617 : 6528 : return ret;
11618 : : }
11619 : :
11620 : : /* Return a declarator for a function with arguments specified by ARGS
11621 : : and return type specified by TARGET. */
11622 : :
11623 : : struct c_declarator *
11624 : 43842191 : build_function_declarator (struct c_arg_info *args,
11625 : : struct c_declarator *target)
11626 : : {
11627 : 43842191 : struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator);
11628 : 43842191 : ret->kind = cdk_function;
11629 : 43842191 : ret->declarator = target;
11630 : 43842191 : ret->u.arg_info = args;
11631 : 43842191 : return ret;
11632 : : }
11633 : :
11634 : : /* Return a declarator for the identifier IDENT (which may be
11635 : : NULL_TREE for an abstract declarator). */
11636 : :
11637 : : struct c_declarator *
11638 : 274435063 : build_id_declarator (tree ident)
11639 : : {
11640 : 274435063 : struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator);
11641 : 274435063 : ret->kind = cdk_id;
11642 : 274435063 : ret->declarator = 0;
11643 : 274435063 : ret->u.id.id = ident;
11644 : 274435063 : ret->u.id.attrs = NULL_TREE;
11645 : : /* Default value - may get reset to a more precise location. */
11646 : 274435063 : ret->id_loc = input_location;
11647 : 274435063 : return ret;
11648 : : }
11649 : :
11650 : : /* Return something to represent absolute declarators containing a *.
11651 : : TARGET is the absolute declarator that the * contains.
11652 : : TYPE_QUALS_ATTRS is a structure for type qualifiers and attributes
11653 : : to apply to the pointer type. */
11654 : :
11655 : : struct c_declarator *
11656 : 16598404 : make_pointer_declarator (struct c_declspecs *type_quals_attrs,
11657 : : struct c_declarator *target)
11658 : : {
11659 : 16598404 : tree attrs;
11660 : 16598404 : int quals = 0;
11661 : 16598404 : struct c_declarator *itarget = target;
11662 : 16598404 : struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator);
11663 : 16598404 : if (type_quals_attrs)
11664 : : {
11665 : 16598404 : attrs = type_quals_attrs->attrs;
11666 : 16598404 : quals = quals_from_declspecs (type_quals_attrs);
11667 : 16598404 : if (attrs != NULL_TREE)
11668 : 6325 : itarget = build_attrs_declarator (attrs, target);
11669 : : }
11670 : 16598404 : ret->kind = cdk_pointer;
11671 : 16598404 : ret->declarator = itarget;
11672 : 16598404 : ret->u.pointer_quals = quals;
11673 : 16598404 : return ret;
11674 : : }
11675 : :
11676 : : /* Return a pointer to a structure for an empty list of declaration
11677 : : specifiers. */
11678 : :
11679 : : struct c_declspecs *
11680 : 397224953 : build_null_declspecs (void)
11681 : : {
11682 : 397224953 : struct c_declspecs *ret = XOBNEW (&parser_obstack, struct c_declspecs);
11683 : 397224953 : memset (ret, 0, sizeof *ret);
11684 : 397224953 : ret->align_log = -1;
11685 : 397224953 : ret->typespec_word = cts_none;
11686 : 397224953 : ret->storage_class = csc_none;
11687 : 397224953 : ret->expr_const_operands = true;
11688 : 397224953 : ret->typespec_kind = ctsk_none;
11689 : 397224953 : ret->address_space = ADDR_SPACE_GENERIC;
11690 : 397224953 : return ret;
11691 : : }
11692 : :
11693 : : /* Add the address space ADDRSPACE to the declaration specifiers
11694 : : SPECS, returning SPECS. */
11695 : :
11696 : : struct c_declspecs *
11697 : 160 : declspecs_add_addrspace (location_t location,
11698 : : struct c_declspecs *specs, addr_space_t as)
11699 : : {
11700 : 160 : specs->non_sc_seen_p = true;
11701 : 160 : specs->declspecs_seen_p = true;
11702 : 160 : specs->non_std_attrs_seen_p = true;
11703 : :
11704 : 160 : if (!ADDR_SPACE_GENERIC_P (specs->address_space)
11705 : 0 : && specs->address_space != as)
11706 : 0 : error ("incompatible address space qualifiers %qs and %qs",
11707 : : c_addr_space_name (as),
11708 : : c_addr_space_name (specs->address_space));
11709 : : else
11710 : : {
11711 : 160 : specs->address_space = as;
11712 : 160 : specs->locations[cdw_address_space] = location;
11713 : : }
11714 : 160 : return specs;
11715 : : }
11716 : :
11717 : : /* Add the type qualifier QUAL to the declaration specifiers SPECS,
11718 : : returning SPECS. */
11719 : :
11720 : : struct c_declspecs *
11721 : 14456659 : declspecs_add_qual (location_t loc,
11722 : : struct c_declspecs *specs, tree qual)
11723 : : {
11724 : 14456659 : enum rid i;
11725 : 14456659 : bool dupe = false;
11726 : 14456659 : specs->non_sc_seen_p = true;
11727 : 14456659 : specs->declspecs_seen_p = true;
11728 : 14456659 : specs->non_std_attrs_seen_p = true;
11729 : 14456659 : gcc_assert (TREE_CODE (qual) == IDENTIFIER_NODE
11730 : : && C_IS_RESERVED_WORD (qual));
11731 : 14456659 : i = C_RID_CODE (qual);
11732 : 14456659 : location_t prev_loc = UNKNOWN_LOCATION;
11733 : 14456659 : switch (i)
11734 : : {
11735 : 11329982 : case RID_CONST:
11736 : 11329982 : dupe = specs->const_p;
11737 : 11329982 : specs->const_p = true;
11738 : 11329982 : prev_loc = specs->locations[cdw_const];
11739 : 11329982 : specs->locations[cdw_const] = loc;
11740 : 11329982 : break;
11741 : 94060 : case RID_VOLATILE:
11742 : 94060 : dupe = specs->volatile_p;
11743 : 94060 : specs->volatile_p = true;
11744 : 94060 : prev_loc = specs->locations[cdw_volatile];
11745 : 94060 : specs->locations[cdw_volatile] = loc;
11746 : 94060 : break;
11747 : 3013798 : case RID_RESTRICT:
11748 : 3013798 : dupe = specs->restrict_p;
11749 : 3013798 : specs->restrict_p = true;
11750 : 3013798 : prev_loc = specs->locations[cdw_restrict];
11751 : 3013798 : specs->locations[cdw_restrict] = loc;
11752 : 3013798 : break;
11753 : 18819 : case RID_ATOMIC:
11754 : 18819 : dupe = specs->atomic_p;
11755 : 18819 : specs->atomic_p = true;
11756 : 18819 : prev_loc = specs->locations[cdw_atomic];
11757 : 18819 : specs->locations[cdw_atomic] = loc;
11758 : 18819 : break;
11759 : 0 : default:
11760 : 0 : gcc_unreachable ();
11761 : : }
11762 : 14456659 : if (dupe)
11763 : : {
11764 : 56 : bool warned = pedwarn_c90 (loc, OPT_Wpedantic,
11765 : : "duplicate %qE declaration specifier", qual);
11766 : 56 : if (!warned
11767 : 52 : && warn_duplicate_decl_specifier
11768 : 33 : && prev_loc >= RESERVED_LOCATION_COUNT
11769 : 33 : && !from_macro_expansion_at (prev_loc)
11770 : 77 : && !from_macro_expansion_at (loc))
11771 : 12 : warning_at (loc, OPT_Wduplicate_decl_specifier,
11772 : : "duplicate %qE declaration specifier", qual);
11773 : : }
11774 : 14456659 : return specs;
11775 : : }
11776 : :
11777 : : /* Add the type specifier TYPE to the declaration specifiers SPECS,
11778 : : returning SPECS. */
11779 : :
11780 : : struct c_declspecs *
11781 : 289772154 : declspecs_add_type (location_t loc, struct c_declspecs *specs,
11782 : : struct c_typespec spec)
11783 : : {
11784 : 289772154 : tree type = spec.spec;
11785 : 289772154 : specs->non_sc_seen_p = true;
11786 : 289772154 : specs->declspecs_seen_p = true;
11787 : 289772154 : specs->non_std_attrs_seen_p = true;
11788 : 289772154 : specs->typespec_kind = spec.kind;
11789 : 289772154 : if (TREE_DEPRECATED (type))
11790 : 56 : specs->deprecated_p = true;
11791 : 289772154 : if (TREE_UNAVAILABLE (type))
11792 : 40 : specs->unavailable_p = true;
11793 : :
11794 : : /* As a type specifier is present, "auto" must be used as a storage
11795 : : class specifier, not for type deduction. */
11796 : 289772154 : if (specs->c23_auto_p)
11797 : : {
11798 : 10 : specs->c23_auto_p = false;
11799 : 10 : if (specs->storage_class != csc_none)
11800 : 1 : error ("multiple storage classes in declaration specifiers");
11801 : 9 : else if (specs->thread_p)
11802 : 1 : error ("%qs used with %<auto%>",
11803 : 1 : specs->thread_gnu_p ? "__thread" : "_Thread_local");
11804 : 8 : else if (specs->constexpr_p)
11805 : : /* auto may only be used with another storage class specifier,
11806 : : such as constexpr, if the type is inferred. */
11807 : 2 : error ("%<auto%> used with %<constexpr%>");
11808 : : else
11809 : 6 : specs->storage_class = csc_auto;
11810 : : }
11811 : :
11812 : : /* Handle type specifier keywords. */
11813 : 289772154 : if (TREE_CODE (type) == IDENTIFIER_NODE
11814 : 73337245 : && C_IS_RESERVED_WORD (type)
11815 : 363109399 : && C_RID_CODE (type) != RID_CXX_COMPAT_WARN)
11816 : : {
11817 : 73337245 : enum rid i = C_RID_CODE (type);
11818 : 73337245 : if (specs->type)
11819 : : {
11820 : 58 : error_at (loc, "two or more data types in declaration specifiers");
11821 : 58 : return specs;
11822 : : }
11823 : 73337187 : if ((int) i <= (int) RID_LAST_MODIFIER)
11824 : : {
11825 : : /* "long", "short", "signed", "unsigned", "_Complex" or "_Sat". */
11826 : 19323985 : bool dupe = false;
11827 : 19323985 : switch (i)
11828 : : {
11829 : 9148409 : case RID_LONG:
11830 : 9148409 : if (specs->long_long_p)
11831 : : {
11832 : 104 : error_at (loc, "%<long long long%> is too long for GCC");
11833 : 104 : break;
11834 : : }
11835 : 9148305 : if (specs->long_p)
11836 : : {
11837 : 2516195 : if (specs->typespec_word == cts_double)
11838 : : {
11839 : 15 : error_at (loc,
11840 : : ("both %<long long%> and %<double%> in "
11841 : : "declaration specifiers"));
11842 : 15 : break;
11843 : : }
11844 : 2516180 : pedwarn_c90 (loc, OPT_Wlong_long,
11845 : : "ISO C90 does not support %<long long%>");
11846 : 2516180 : specs->long_long_p = 1;
11847 : 2516180 : specs->locations[cdw_long_long] = loc;
11848 : 2516180 : break;
11849 : : }
11850 : 6632110 : if (specs->short_p)
11851 : 77 : error_at (loc,
11852 : : ("both %<long%> and %<short%> in "
11853 : : "declaration specifiers"));
11854 : 6632033 : else if (specs->typespec_word == cts_auto_type)
11855 : 1 : error_at (loc,
11856 : : ("both %<long%> and %<__auto_type%> in "
11857 : : "declaration specifiers"));
11858 : : else if (specs->typespec_word == cts_void)
11859 : 5 : error_at (loc,
11860 : : ("both %<long%> and %<void%> in "
11861 : : "declaration specifiers"));
11862 : : else if (specs->typespec_word == cts_int_n)
11863 : 19 : error_at (loc,
11864 : : ("both %<long%> and %<__int%d%> in "
11865 : : "declaration specifiers"),
11866 : 19 : int_n_data[specs->u.int_n_idx].bitsize);
11867 : : else if (specs->typespec_word == cts_bool)
11868 : 3 : error_at (loc,
11869 : : ("both %<long%> and %<_Bool%> in "
11870 : : "declaration specifiers"));
11871 : : else if (specs->typespec_word == cts_bitint)
11872 : 3 : error_at (loc,
11873 : : ("both %<long%> and %<_BitInt%> in "
11874 : : "declaration specifiers"));
11875 : : else if (specs->typespec_word == cts_char)
11876 : 21 : error_at (loc,
11877 : : ("both %<long%> and %<char%> in "
11878 : : "declaration specifiers"));
11879 : : else if (specs->typespec_word == cts_float)
11880 : 7 : error_at (loc,
11881 : : ("both %<long%> and %<float%> in "
11882 : : "declaration specifiers"));
11883 : : else if (specs->typespec_word == cts_floatn_nx)
11884 : 0 : error_at (loc,
11885 : : ("both %<long%> and %<_Float%d%s%> in "
11886 : : "declaration specifiers"),
11887 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
11888 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
11889 : : ? "x"
11890 : : : ""));
11891 : : else if (specs->typespec_word == cts_dfloat32)
11892 : 4 : error_at (loc,
11893 : : ("both %<long%> and %<_Decimal32%> in "
11894 : : "declaration specifiers"));
11895 : : else if (specs->typespec_word == cts_dfloat64)
11896 : 4 : error_at (loc,
11897 : : ("both %<long%> and %<_Decimal64%> in "
11898 : : "declaration specifiers"));
11899 : : else if (specs->typespec_word == cts_dfloat128)
11900 : 4 : error_at (loc,
11901 : : ("both %<long%> and %<_Decimal128%> in "
11902 : : "declaration specifiers"));
11903 : : else
11904 : : {
11905 : 6631962 : specs->long_p = true;
11906 : 6631962 : specs->locations[cdw_long] = loc;
11907 : : }
11908 : : break;
11909 : 1623401 : case RID_SHORT:
11910 : 1623401 : dupe = specs->short_p;
11911 : 1623401 : if (specs->long_p)
11912 : 197 : error_at (loc,
11913 : : ("both %<long%> and %<short%> in "
11914 : : "declaration specifiers"));
11915 : 1623204 : else if (specs->typespec_word == cts_auto_type)
11916 : 1 : error_at (loc,
11917 : : ("both %<short%> and %<__auto_type%> in "
11918 : : "declaration specifiers"));
11919 : : else if (specs->typespec_word == cts_void)
11920 : 5 : error_at (loc,
11921 : : ("both %<short%> and %<void%> in "
11922 : : "declaration specifiers"));
11923 : : else if (specs->typespec_word == cts_int_n)
11924 : 19 : error_at (loc,
11925 : : ("both %<short%> and %<__int%d%> in "
11926 : : "declaration specifiers"),
11927 : 19 : int_n_data[specs->u.int_n_idx].bitsize);
11928 : : else if (specs->typespec_word == cts_bool)
11929 : 3 : error_at (loc,
11930 : : ("both %<short%> and %<_Bool%> in "
11931 : : "declaration specifiers"));
11932 : : else if (specs->typespec_word == cts_bitint)
11933 : 1 : error_at (loc,
11934 : : ("both %<short%> and %<_BitInt%> in "
11935 : : "declaration specifiers"));
11936 : : else if (specs->typespec_word == cts_char)
11937 : 21 : error_at (loc,
11938 : : ("both %<short%> and %<char%> in "
11939 : : "declaration specifiers"));
11940 : : else if (specs->typespec_word == cts_float)
11941 : 7 : error_at (loc,
11942 : : ("both %<short%> and %<float%> in "
11943 : : "declaration specifiers"));
11944 : : else if (specs->typespec_word == cts_double)
11945 : 7 : error_at (loc,
11946 : : ("both %<short%> and %<double%> in "
11947 : : "declaration specifiers"));
11948 : : else if (specs->typespec_word == cts_floatn_nx)
11949 : 0 : error_at (loc,
11950 : : ("both %<short%> and %<_Float%d%s%> in "
11951 : : "declaration specifiers"),
11952 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
11953 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
11954 : : ? "x"
11955 : : : ""));
11956 : : else if (specs->typespec_word == cts_dfloat32)
11957 : 4 : error_at (loc,
11958 : : ("both %<short%> and %<_Decimal32%> in "
11959 : : "declaration specifiers"));
11960 : : else if (specs->typespec_word == cts_dfloat64)
11961 : 4 : error_at (loc,
11962 : : ("both %<short%> and %<_Decimal64%> in "
11963 : : "declaration specifiers"));
11964 : : else if (specs->typespec_word == cts_dfloat128)
11965 : 4 : error_at (loc,
11966 : : ("both %<short%> and %<_Decimal128%> in "
11967 : : "declaration specifiers"));
11968 : : else
11969 : : {
11970 : 1623128 : specs->short_p = true;
11971 : 1623128 : specs->locations[cdw_short] = loc;
11972 : : }
11973 : : break;
11974 : 560514 : case RID_SIGNED:
11975 : 560514 : dupe = specs->signed_p;
11976 : 560514 : if (specs->unsigned_p)
11977 : 138 : error_at (loc,
11978 : : ("both %<signed%> and %<unsigned%> in "
11979 : : "declaration specifiers"));
11980 : 560376 : else if (specs->typespec_word == cts_auto_type)
11981 : 1 : error_at (loc,
11982 : : ("both %<signed%> and %<__auto_type%> in "
11983 : : "declaration specifiers"));
11984 : : else if (specs->typespec_word == cts_void)
11985 : 5 : error_at (loc,
11986 : : ("both %<signed%> and %<void%> in "
11987 : : "declaration specifiers"));
11988 : : else if (specs->typespec_word == cts_bool)
11989 : 3 : error_at (loc,
11990 : : ("both %<signed%> and %<_Bool%> in "
11991 : : "declaration specifiers"));
11992 : : else if (specs->typespec_word == cts_float)
11993 : 7 : error_at (loc,
11994 : : ("both %<signed%> and %<float%> in "
11995 : : "declaration specifiers"));
11996 : : else if (specs->typespec_word == cts_double)
11997 : 21 : error_at (loc,
11998 : : ("both %<signed%> and %<double%> in "
11999 : : "declaration specifiers"));
12000 : : else if (specs->typespec_word == cts_floatn_nx)
12001 : 0 : error_at (loc,
12002 : : ("both %<signed%> and %<_Float%d%s%> in "
12003 : : "declaration specifiers"),
12004 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12005 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12006 : : ? "x"
12007 : : : ""));
12008 : : else if (specs->typespec_word == cts_dfloat32)
12009 : 4 : error_at (loc,
12010 : : ("both %<signed%> and %<_Decimal32%> in "
12011 : : "declaration specifiers"));
12012 : : else if (specs->typespec_word == cts_dfloat64)
12013 : 4 : error_at (loc,
12014 : : ("both %<signed%> and %<_Decimal64%> in "
12015 : : "declaration specifiers"));
12016 : : else if (specs->typespec_word == cts_dfloat128)
12017 : 4 : error_at (loc,
12018 : : ("both %<signed%> and %<_Decimal128%> in "
12019 : : "declaration specifiers"));
12020 : : else
12021 : : {
12022 : 560327 : specs->signed_p = true;
12023 : 560327 : specs->locations[cdw_signed] = loc;
12024 : : }
12025 : : break;
12026 : 5717683 : case RID_UNSIGNED:
12027 : 5717683 : dupe = specs->unsigned_p;
12028 : 5717683 : if (specs->signed_p)
12029 : 139 : error_at (loc,
12030 : : ("both %<signed%> and %<unsigned%> in "
12031 : : "declaration specifiers"));
12032 : 5717544 : else if (specs->typespec_word == cts_auto_type)
12033 : 1 : error_at (loc,
12034 : : ("both %<unsigned%> and %<__auto_type%> in "
12035 : : "declaration specifiers"));
12036 : : else if (specs->typespec_word == cts_void)
12037 : 5 : error_at (loc,
12038 : : ("both %<unsigned%> and %<void%> in "
12039 : : "declaration specifiers"));
12040 : : else if (specs->typespec_word == cts_bool)
12041 : 3 : error_at (loc,
12042 : : ("both %<unsigned%> and %<_Bool%> in "
12043 : : "declaration specifiers"));
12044 : : else if (specs->typespec_word == cts_float)
12045 : 7 : error_at (loc,
12046 : : ("both %<unsigned%> and %<float%> in "
12047 : : "declaration specifiers"));
12048 : : else if (specs->typespec_word == cts_double)
12049 : 21 : error_at (loc,
12050 : : ("both %<unsigned%> and %<double%> in "
12051 : : "declaration specifiers"));
12052 : : else if (specs->typespec_word == cts_floatn_nx)
12053 : 0 : error_at (loc,
12054 : : ("both %<unsigned%> and %<_Float%d%s%> in "
12055 : : "declaration specifiers"),
12056 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12057 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12058 : : ? "x"
12059 : : : ""));
12060 : : else if (specs->typespec_word == cts_dfloat32)
12061 : 2 : error_at (loc,
12062 : : ("both %<unsigned%> and %<_Decimal32%> in "
12063 : : "declaration specifiers"));
12064 : : else if (specs->typespec_word == cts_dfloat64)
12065 : 2 : error_at (loc,
12066 : : ("both %<unsigned%> and %<_Decimal64%> in "
12067 : : "declaration specifiers"));
12068 : : else if (specs->typespec_word == cts_dfloat128)
12069 : 2 : error_at (loc,
12070 : : ("both %<unsigned%> and %<_Decimal128%> in "
12071 : : "declaration specifiers"));
12072 : : else
12073 : : {
12074 : 5717501 : specs->unsigned_p = true;
12075 : 5717501 : specs->locations[cdw_unsigned] = loc;
12076 : : }
12077 : : break;
12078 : 2273845 : case RID_COMPLEX:
12079 : 2273845 : dupe = specs->complex_p;
12080 : 2273845 : if (!in_system_header_at (loc))
12081 : 68129 : pedwarn_c90 (loc, OPT_Wpedantic,
12082 : : "ISO C90 does not support complex types");
12083 : 2273845 : if (specs->typespec_word == cts_auto_type)
12084 : 1 : error_at (loc,
12085 : : ("both %<complex%> and %<__auto_type%> in "
12086 : : "declaration specifiers"));
12087 : : else if (specs->typespec_word == cts_void)
12088 : 2 : error_at (loc,
12089 : : ("both %<complex%> and %<void%> in "
12090 : : "declaration specifiers"));
12091 : : else if (specs->typespec_word == cts_bool)
12092 : 2 : error_at (loc,
12093 : : ("both %<complex%> and %<_Bool%> in "
12094 : : "declaration specifiers"));
12095 : : else if (specs->typespec_word == cts_bitint)
12096 : 1 : error_at (loc,
12097 : : ("both %<complex%> and %<_BitInt%> in "
12098 : : "declaration specifiers"));
12099 : : else if (specs->typespec_word == cts_dfloat32)
12100 : 1 : error_at (loc,
12101 : : ("both %<complex%> and %<_Decimal32%> in "
12102 : : "declaration specifiers"));
12103 : : else if (specs->typespec_word == cts_dfloat64)
12104 : 1 : error_at (loc,
12105 : : ("both %<complex%> and %<_Decimal64%> in "
12106 : : "declaration specifiers"));
12107 : : else if (specs->typespec_word == cts_dfloat128)
12108 : 1 : error_at (loc,
12109 : : ("both %<complex%> and %<_Decimal128%> in "
12110 : : "declaration specifiers"));
12111 : : else if (specs->typespec_word == cts_fract)
12112 : 0 : error_at (loc,
12113 : : ("both %<complex%> and %<_Fract%> in "
12114 : : "declaration specifiers"));
12115 : : else if (specs->typespec_word == cts_accum)
12116 : 0 : error_at (loc,
12117 : : ("both %<complex%> and %<_Accum%> in "
12118 : : "declaration specifiers"));
12119 : 2273836 : else if (specs->saturating_p)
12120 : 0 : error_at (loc,
12121 : : ("both %<complex%> and %<_Sat%> in "
12122 : : "declaration specifiers"));
12123 : : else
12124 : : {
12125 : 2273836 : specs->complex_p = true;
12126 : 2273836 : specs->locations[cdw_complex] = loc;
12127 : : }
12128 : : break;
12129 : 133 : case RID_SAT:
12130 : 133 : dupe = specs->saturating_p;
12131 : 133 : pedwarn (loc, OPT_Wpedantic,
12132 : : "ISO C does not support saturating types");
12133 : 133 : if (specs->typespec_word == cts_int_n)
12134 : : {
12135 : 0 : error_at (loc,
12136 : : ("both %<_Sat%> and %<__int%d%> in "
12137 : : "declaration specifiers"),
12138 : 0 : int_n_data[specs->u.int_n_idx].bitsize);
12139 : : }
12140 : : else if (specs->typespec_word == cts_auto_type)
12141 : 0 : error_at (loc,
12142 : : ("both %<_Sat%> and %<__auto_type%> in "
12143 : : "declaration specifiers"));
12144 : : else if (specs->typespec_word == cts_void)
12145 : 0 : error_at (loc,
12146 : : ("both %<_Sat%> and %<void%> in "
12147 : : "declaration specifiers"));
12148 : : else if (specs->typespec_word == cts_bool)
12149 : 0 : error_at (loc,
12150 : : ("both %<_Sat%> and %<_Bool%> in "
12151 : : "declaration specifiers"));
12152 : : else if (specs->typespec_word == cts_bitint)
12153 : 0 : error_at (loc,
12154 : : ("both %<_Sat%> and %<_BitInt%> in "
12155 : : "declaration specifiers"));
12156 : : else if (specs->typespec_word == cts_char)
12157 : 0 : error_at (loc,
12158 : : ("both %<_Sat%> and %<char%> in "
12159 : : "declaration specifiers"));
12160 : : else if (specs->typespec_word == cts_int)
12161 : 0 : error_at (loc,
12162 : : ("both %<_Sat%> and %<int%> in "
12163 : : "declaration specifiers"));
12164 : : else if (specs->typespec_word == cts_float)
12165 : 0 : error_at (loc,
12166 : : ("both %<_Sat%> and %<float%> in "
12167 : : "declaration specifiers"));
12168 : : else if (specs->typespec_word == cts_double)
12169 : 0 : error_at (loc,
12170 : : ("both %<_Sat%> and %<double%> in "
12171 : : "declaration specifiers"));
12172 : : else if (specs->typespec_word == cts_floatn_nx)
12173 : 0 : error_at (loc,
12174 : : ("both %<_Sat%> and %<_Float%d%s%> in "
12175 : : "declaration specifiers"),
12176 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12177 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12178 : : ? "x"
12179 : : : ""));
12180 : : else if (specs->typespec_word == cts_dfloat32)
12181 : 0 : error_at (loc,
12182 : : ("both %<_Sat%> and %<_Decimal32%> in "
12183 : : "declaration specifiers"));
12184 : : else if (specs->typespec_word == cts_dfloat64)
12185 : 0 : error_at (loc,
12186 : : ("both %<_Sat%> and %<_Decimal64%> in "
12187 : : "declaration specifiers"));
12188 : : else if (specs->typespec_word == cts_dfloat128)
12189 : 0 : error_at (loc,
12190 : : ("both %<_Sat%> and %<_Decimal128%> in "
12191 : : "declaration specifiers"));
12192 : 133 : else if (specs->complex_p)
12193 : 0 : error_at (loc,
12194 : : ("both %<_Sat%> and %<complex%> in "
12195 : : "declaration specifiers"));
12196 : : else
12197 : : {
12198 : 133 : specs->saturating_p = true;
12199 : 133 : specs->locations[cdw_saturating] = loc;
12200 : : }
12201 : : break;
12202 : 0 : default:
12203 : 0 : gcc_unreachable ();
12204 : : }
12205 : :
12206 : 19323985 : if (dupe)
12207 : 378 : error_at (loc, "duplicate %qE", type);
12208 : :
12209 : 19323985 : return specs;
12210 : : }
12211 : : else
12212 : : {
12213 : : /* "void", "_Bool", "char", "int", "float", "double",
12214 : : "_FloatN", "_FloatNx", "_Decimal32", "__intN",
12215 : : "_Decimal64", "_Decimal128", "_Fract", "_Accum", "_BitInt(N)" or
12216 : : "__auto_type". */
12217 : 54013202 : if (specs->typespec_word != cts_none)
12218 : : {
12219 : 2168 : error_at (loc,
12220 : : "two or more data types in declaration specifiers");
12221 : 2168 : return specs;
12222 : : }
12223 : 54011034 : switch (i)
12224 : : {
12225 : 1793 : case RID_AUTO_TYPE:
12226 : 1793 : if (specs->long_p)
12227 : 1 : error_at (loc,
12228 : : ("both %<long%> and %<__auto_type%> in "
12229 : : "declaration specifiers"));
12230 : 1792 : else if (specs->short_p)
12231 : 1 : error_at (loc,
12232 : : ("both %<short%> and %<__auto_type%> in "
12233 : : "declaration specifiers"));
12234 : 1791 : else if (specs->signed_p)
12235 : 1 : error_at (loc,
12236 : : ("both %<signed%> and %<__auto_type%> in "
12237 : : "declaration specifiers"));
12238 : 1790 : else if (specs->unsigned_p)
12239 : 1 : error_at (loc,
12240 : : ("both %<unsigned%> and %<__auto_type%> in "
12241 : : "declaration specifiers"));
12242 : 1789 : else if (specs->complex_p)
12243 : 1 : error_at (loc,
12244 : : ("both %<complex%> and %<__auto_type%> in "
12245 : : "declaration specifiers"));
12246 : 1788 : else if (specs->saturating_p)
12247 : 0 : error_at (loc,
12248 : : ("both %<_Sat%> and %<__auto_type%> in "
12249 : : "declaration specifiers"));
12250 : : else
12251 : : {
12252 : 1788 : specs->typespec_word = cts_auto_type;
12253 : 1788 : specs->locations[cdw_typespec] = loc;
12254 : : }
12255 : 1793 : return specs;
12256 : 50967 : case RID_INT_N_0:
12257 : 50967 : case RID_INT_N_1:
12258 : 50967 : case RID_INT_N_2:
12259 : 50967 : case RID_INT_N_3:
12260 : 50967 : specs->u.int_n_idx = i - RID_INT_N_0;
12261 : 50967 : if (!in_system_header_at (input_location)
12262 : : /* If the INT_N type ends in "__", and so is of the format
12263 : : "__intN__", don't pedwarn. */
12264 : 50967 : && (strncmp (IDENTIFIER_POINTER (type)
12265 : 40811 : + (IDENTIFIER_LENGTH (type) - 2), "__", 2) != 0))
12266 : 40811 : pedwarn (loc, OPT_Wpedantic,
12267 : : "ISO C does not support %<__int%d%> types",
12268 : 40811 : int_n_data[specs->u.int_n_idx].bitsize);
12269 : :
12270 : 50967 : if (specs->long_p)
12271 : 53 : error_at (loc,
12272 : : ("both %<__int%d%> and %<long%> in "
12273 : : "declaration specifiers"),
12274 : 53 : int_n_data[specs->u.int_n_idx].bitsize);
12275 : 50914 : else if (specs->saturating_p)
12276 : 0 : error_at (loc,
12277 : : ("both %<_Sat%> and %<__int%d%> in "
12278 : : "declaration specifiers"),
12279 : 0 : int_n_data[specs->u.int_n_idx].bitsize);
12280 : 50914 : else if (specs->short_p)
12281 : 19 : error_at (loc,
12282 : : ("both %<__int%d%> and %<short%> in "
12283 : : "declaration specifiers"),
12284 : 19 : int_n_data[specs->u.int_n_idx].bitsize);
12285 : 50895 : else if (! int_n_enabled_p[specs->u.int_n_idx])
12286 : : {
12287 : 0 : specs->typespec_word = cts_int_n;
12288 : 0 : error_at (loc,
12289 : : "%<__int%d%> is not supported on this target",
12290 : 0 : int_n_data[specs->u.int_n_idx].bitsize);
12291 : : }
12292 : : else
12293 : : {
12294 : 50895 : specs->typespec_word = cts_int_n;
12295 : 50895 : specs->locations[cdw_typespec] = loc;
12296 : : }
12297 : 50967 : return specs;
12298 : 7366827 : case RID_VOID:
12299 : 7366827 : if (specs->long_p)
12300 : 44 : error_at (loc,
12301 : : ("both %<long%> and %<void%> in "
12302 : : "declaration specifiers"));
12303 : 7366783 : else if (specs->short_p)
12304 : 21 : error_at (loc,
12305 : : ("both %<short%> and %<void%> in "
12306 : : "declaration specifiers"));
12307 : 7366762 : else if (specs->signed_p)
12308 : 5 : error_at (loc,
12309 : : ("both %<signed%> and %<void%> in "
12310 : : "declaration specifiers"));
12311 : 7366757 : else if (specs->unsigned_p)
12312 : 5 : error_at (loc,
12313 : : ("both %<unsigned%> and %<void%> in "
12314 : : "declaration specifiers"));
12315 : 7366752 : else if (specs->complex_p)
12316 : 2 : error_at (loc,
12317 : : ("both %<complex%> and %<void%> in "
12318 : : "declaration specifiers"));
12319 : 7366750 : else if (specs->saturating_p)
12320 : 0 : error_at (loc,
12321 : : ("both %<_Sat%> and %<void%> in "
12322 : : "declaration specifiers"));
12323 : : else
12324 : : {
12325 : 7366750 : specs->typespec_word = cts_void;
12326 : 7366750 : specs->locations[cdw_typespec] = loc;
12327 : : }
12328 : 7366827 : return specs;
12329 : 75588 : case RID_BOOL:
12330 : 75588 : if (!in_system_header_at (loc))
12331 : 22694 : pedwarn_c90 (loc, OPT_Wpedantic,
12332 : : "ISO C90 does not support boolean types");
12333 : 75588 : if (specs->long_p)
12334 : 27 : error_at (loc,
12335 : : ("both %<long%> and %<_Bool%> in "
12336 : : "declaration specifiers"));
12337 : 75561 : else if (specs->short_p)
12338 : 11 : error_at (loc,
12339 : : ("both %<short%> and %<_Bool%> in "
12340 : : "declaration specifiers"));
12341 : 75550 : else if (specs->signed_p)
12342 : 3 : error_at (loc,
12343 : : ("both %<signed%> and %<_Bool%> in "
12344 : : "declaration specifiers"));
12345 : 75547 : else if (specs->unsigned_p)
12346 : 3 : error_at (loc,
12347 : : ("both %<unsigned%> and %<_Bool%> in "
12348 : : "declaration specifiers"));
12349 : 75544 : else if (specs->complex_p)
12350 : 2 : error_at (loc,
12351 : : ("both %<complex%> and %<_Bool%> in "
12352 : : "declaration specifiers"));
12353 : 75542 : else if (specs->saturating_p)
12354 : 0 : error_at (loc,
12355 : : ("both %<_Sat%> and %<_Bool%> in "
12356 : : "declaration specifiers"));
12357 : : else
12358 : : {
12359 : 75542 : specs->typespec_word = cts_bool;
12360 : 75542 : specs->locations[cdw_typespec] = loc;
12361 : : }
12362 : 75588 : return specs;
12363 : 8484055 : case RID_CHAR:
12364 : 8484055 : if (specs->long_p)
12365 : 44 : error_at (loc,
12366 : : ("both %<long%> and %<char%> in "
12367 : : "declaration specifiers"));
12368 : 8484011 : else if (specs->short_p)
12369 : 21 : error_at (loc,
12370 : : ("both %<short%> and %<char%> in "
12371 : : "declaration specifiers"));
12372 : 8483990 : else if (specs->saturating_p)
12373 : 0 : error_at (loc,
12374 : : ("both %<_Sat%> and %<char%> in "
12375 : : "declaration specifiers"));
12376 : : else
12377 : : {
12378 : 8483990 : specs->typespec_word = cts_char;
12379 : 8483990 : specs->locations[cdw_typespec] = loc;
12380 : : }
12381 : 8484055 : return specs;
12382 : 21558431 : case RID_INT:
12383 : 21558431 : if (specs->saturating_p)
12384 : 0 : error_at (loc,
12385 : : ("both %<_Sat%> and %<int%> in "
12386 : : "declaration specifiers"));
12387 : : else
12388 : : {
12389 : 21558431 : specs->typespec_word = cts_int;
12390 : 21558431 : specs->locations[cdw_typespec] = loc;
12391 : : }
12392 : 21558431 : return specs;
12393 : 2862973 : case RID_FLOAT:
12394 : 2862973 : if (specs->long_p)
12395 : 44 : error_at (loc,
12396 : : ("both %<long%> and %<float%> in "
12397 : : "declaration specifiers"));
12398 : 2862929 : else if (specs->short_p)
12399 : 21 : error_at (loc,
12400 : : ("both %<short%> and %<float%> in "
12401 : : "declaration specifiers"));
12402 : 2862908 : else if (specs->signed_p)
12403 : 5 : error_at (loc,
12404 : : ("both %<signed%> and %<float%> in "
12405 : : "declaration specifiers"));
12406 : 2862903 : else if (specs->unsigned_p)
12407 : 5 : error_at (loc,
12408 : : ("both %<unsigned%> and %<float%> in "
12409 : : "declaration specifiers"));
12410 : 2862898 : else if (specs->saturating_p)
12411 : 0 : error_at (loc,
12412 : : ("both %<_Sat%> and %<float%> in "
12413 : : "declaration specifiers"));
12414 : : else
12415 : : {
12416 : 2862898 : specs->typespec_word = cts_float;
12417 : 2862898 : specs->locations[cdw_typespec] = loc;
12418 : : }
12419 : 2862973 : return specs;
12420 : 5032271 : case RID_DOUBLE:
12421 : 5032271 : if (specs->long_long_p)
12422 : 22 : error_at (loc,
12423 : : ("both %<long long%> and %<double%> in "
12424 : : "declaration specifiers"));
12425 : 5032249 : else if (specs->short_p)
12426 : 21 : error_at (loc,
12427 : : ("both %<short%> and %<double%> in "
12428 : : "declaration specifiers"));
12429 : 5032228 : else if (specs->signed_p)
12430 : 13 : error_at (loc,
12431 : : ("both %<signed%> and %<double%> in "
12432 : : "declaration specifiers"));
12433 : 5032215 : else if (specs->unsigned_p)
12434 : 13 : error_at (loc,
12435 : : ("both %<unsigned%> and %<double%> in "
12436 : : "declaration specifiers"));
12437 : 5032202 : else if (specs->saturating_p)
12438 : 0 : error_at (loc,
12439 : : ("both %<_Sat%> and %<double%> in "
12440 : : "declaration specifiers"));
12441 : : else
12442 : : {
12443 : 5032202 : specs->typespec_word = cts_double;
12444 : 5032202 : specs->locations[cdw_typespec] = loc;
12445 : : }
12446 : 5032271 : return specs;
12447 : 8485658 : CASE_RID_FLOATN_NX:
12448 : 8485658 : specs->u.floatn_nx_idx = i - RID_FLOATN_NX_FIRST;
12449 : 8485658 : if (!in_system_header_at (input_location))
12450 : 95808 : pedwarn_c11 (loc, OPT_Wpedantic,
12451 : : "ISO C does not support the %<_Float%d%s%> type"
12452 : : " before C23",
12453 : 47904 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12454 : 47904 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12455 : : ? "x"
12456 : : : ""));
12457 : :
12458 : 8485658 : if (specs->long_p)
12459 : 0 : error_at (loc,
12460 : : ("both %<long%> and %<_Float%d%s%> in "
12461 : : "declaration specifiers"),
12462 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12463 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12464 : : ? "x"
12465 : : : ""));
12466 : 8485658 : else if (specs->short_p)
12467 : 0 : error_at (loc,
12468 : : ("both %<short%> and %<_Float%d%s%> in "
12469 : : "declaration specifiers"),
12470 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12471 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12472 : : ? "x"
12473 : : : ""));
12474 : 8485658 : else if (specs->signed_p)
12475 : 0 : error_at (loc,
12476 : : ("both %<signed%> and %<_Float%d%s%> in "
12477 : : "declaration specifiers"),
12478 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12479 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12480 : : ? "x"
12481 : : : ""));
12482 : 8485658 : else if (specs->unsigned_p)
12483 : 0 : error_at (loc,
12484 : : ("both %<unsigned%> and %<_Float%d%s%> in "
12485 : : "declaration specifiers"),
12486 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12487 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12488 : : ? "x"
12489 : : : ""));
12490 : 8485658 : else if (specs->saturating_p)
12491 : 0 : error_at (loc,
12492 : : ("both %<_Sat%> and %<_Float%d%s%> in "
12493 : : "declaration specifiers"),
12494 : 0 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12495 : 0 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12496 : : ? "x"
12497 : : : ""));
12498 : 8485658 : else if (FLOATN_NX_TYPE_NODE (specs->u.floatn_nx_idx) == NULL_TREE)
12499 : : {
12500 : 88 : specs->typespec_word = cts_floatn_nx;
12501 : 176 : error_at (loc,
12502 : : "%<_Float%d%s%> is not supported on this target",
12503 : 88 : floatn_nx_types[specs->u.floatn_nx_idx].n,
12504 : 88 : (floatn_nx_types[specs->u.floatn_nx_idx].extended
12505 : : ? "x"
12506 : : : ""));
12507 : : }
12508 : : else
12509 : : {
12510 : 8485570 : specs->typespec_word = cts_floatn_nx;
12511 : 8485570 : specs->locations[cdw_typespec] = loc;
12512 : : }
12513 : 8485658 : return specs;
12514 : 47499 : case RID_DFLOAT32:
12515 : 47499 : case RID_DFLOAT64:
12516 : 47499 : case RID_DFLOAT128:
12517 : 47499 : {
12518 : 47499 : const char *str;
12519 : 47499 : if (i == RID_DFLOAT32)
12520 : : str = "_Decimal32";
12521 : 31597 : else if (i == RID_DFLOAT64)
12522 : : str = "_Decimal64";
12523 : : else
12524 : 15749 : str = "_Decimal128";
12525 : 47499 : if (specs->long_long_p)
12526 : 18 : error_at (loc,
12527 : : ("both %<long long%> and %qs in "
12528 : : "declaration specifiers"),
12529 : : str);
12530 : 47499 : if (specs->long_p)
12531 : 33 : error_at (loc,
12532 : : ("both %<long%> and %qs in "
12533 : : "declaration specifiers"),
12534 : : str);
12535 : 47466 : else if (specs->short_p)
12536 : 18 : error_at (loc,
12537 : : ("both %<short%> and %qs in "
12538 : : "declaration specifiers"),
12539 : : str);
12540 : 47448 : else if (specs->signed_p)
12541 : 6 : error_at (loc,
12542 : : ("both %<signed%> and %qs in "
12543 : : "declaration specifiers"),
12544 : : str);
12545 : 47442 : else if (specs->unsigned_p)
12546 : 3 : error_at (loc,
12547 : : ("both %<unsigned%> and %qs in "
12548 : : "declaration specifiers"),
12549 : : str);
12550 : 47439 : else if (specs->complex_p)
12551 : 3 : error_at (loc,
12552 : : ("both %<complex%> and %qs in "
12553 : : "declaration specifiers"),
12554 : : str);
12555 : 47436 : else if (specs->saturating_p)
12556 : 0 : error_at (loc,
12557 : : ("both %<_Sat%> and %qs in "
12558 : : "declaration specifiers"),
12559 : : str);
12560 : 47436 : else if (i == RID_DFLOAT32)
12561 : 15881 : specs->typespec_word = cts_dfloat32;
12562 : 31555 : else if (i == RID_DFLOAT64)
12563 : 15827 : specs->typespec_word = cts_dfloat64;
12564 : : else
12565 : 15728 : specs->typespec_word = cts_dfloat128;
12566 : 47499 : specs->locations[cdw_typespec] = loc;
12567 : : }
12568 : 47499 : if (!targetm.decimal_float_supported_p ())
12569 : 0 : error_at (loc,
12570 : : ("decimal floating-point not supported "
12571 : : "for this target"));
12572 : 47499 : pedwarn_c11 (loc, OPT_Wpedantic,
12573 : : "ISO C does not support decimal floating-point "
12574 : : "before C23");
12575 : 47499 : return specs;
12576 : 135 : case RID_FRACT:
12577 : 135 : case RID_ACCUM:
12578 : 135 : {
12579 : 135 : const char *str;
12580 : 135 : if (i == RID_FRACT)
12581 : : str = "_Fract";
12582 : : else
12583 : 67 : str = "_Accum";
12584 : 135 : if (specs->complex_p)
12585 : 0 : error_at (loc,
12586 : : ("both %<complex%> and %qs in "
12587 : : "declaration specifiers"),
12588 : : str);
12589 : 135 : else if (i == RID_FRACT)
12590 : 68 : specs->typespec_word = cts_fract;
12591 : : else
12592 : 67 : specs->typespec_word = cts_accum;
12593 : 135 : specs->locations[cdw_typespec] = loc;
12594 : : }
12595 : 135 : if (!targetm.fixed_point_supported_p ())
12596 : 135 : error_at (loc,
12597 : : "fixed-point types not supported for this target");
12598 : 135 : pedwarn (loc, OPT_Wpedantic,
12599 : : "ISO C does not support fixed-point types");
12600 : 135 : return specs;
12601 : 44837 : case RID_BITINT:
12602 : 44837 : if (specs->long_p)
12603 : 2 : error_at (loc,
12604 : : ("both %<long%> and %<_BitInt%> in "
12605 : : "declaration specifiers"));
12606 : 44835 : else if (specs->short_p)
12607 : 1 : error_at (loc,
12608 : : ("both %<short%> and %<_BitInt%> in "
12609 : : "declaration specifiers"));
12610 : 44834 : else if (specs->complex_p)
12611 : 1 : error_at (loc,
12612 : : ("both %<complex%> and %<_BitInt%> in "
12613 : : "declaration specifiers"));
12614 : 44833 : else if (specs->saturating_p)
12615 : 0 : error_at (loc,
12616 : : ("both %<_Sat%> and %<_BitInt%> in "
12617 : : "declaration specifiers"));
12618 : : else
12619 : : {
12620 : 44833 : specs->typespec_word = cts_bitint;
12621 : 44833 : specs->locations[cdw_typespec] = loc;
12622 : 44833 : specs->u.bitint_prec = -1;
12623 : 44833 : if (error_operand_p (spec.expr))
12624 : 7 : return specs;
12625 : 44833 : if (TREE_CODE (spec.expr) != INTEGER_CST
12626 : 44833 : || !INTEGRAL_TYPE_P (TREE_TYPE (spec.expr)))
12627 : : {
12628 : 1 : error_at (loc, "%<_BitInt%> argument is not an integer "
12629 : : "constant expression");
12630 : 1 : return specs;
12631 : : }
12632 : 44832 : if (tree_int_cst_sgn (spec.expr) <= 0)
12633 : : {
12634 : 4 : error_at (loc, "%<_BitInt%> argument %qE is not a "
12635 : : "positive integer constant expression",
12636 : : spec.expr);
12637 : 4 : return specs;
12638 : : }
12639 : 44828 : if (wi::to_widest (spec.expr) > WIDE_INT_MAX_PRECISION - 1)
12640 : : {
12641 : 2 : error_at (loc, "%<_BitInt%> argument %qE is larger than "
12642 : : "%<BITINT_MAXWIDTH%> %qd",
12643 : : spec.expr, (int) WIDE_INT_MAX_PRECISION - 1);
12644 : 2 : return specs;
12645 : : }
12646 : 44826 : specs->u.bitint_prec = tree_to_uhwi (spec.expr);
12647 : 44826 : struct bitint_info info;
12648 : 44826 : if (!targetm.c.bitint_type_info (specs->u.bitint_prec,
12649 : : &info))
12650 : : {
12651 : 0 : sorry_at (loc, "%<_BitInt(%d)%> is not supported on "
12652 : : "this target", specs->u.bitint_prec);
12653 : 0 : specs->u.bitint_prec = -1;
12654 : 0 : return specs;
12655 : : }
12656 : : }
12657 : 44830 : return specs;
12658 : : default:
12659 : : /* ObjC reserved word "id", handled below. */
12660 : : break;
12661 : : }
12662 : : }
12663 : : }
12664 : :
12665 : : /* Now we have a typedef (a TYPE_DECL node), an identifier (some
12666 : : form of ObjC type, cases such as "int" and "long" being handled
12667 : : above), a TYPE (struct, union, enum and typeof specifiers) or an
12668 : : ERROR_MARK. In none of these cases may there have previously
12669 : : been any type specifiers. */
12670 : 216434909 : if (specs->type || specs->typespec_word != cts_none
12671 : : || specs->long_p || specs->short_p || specs->signed_p
12672 : 216434904 : || specs->unsigned_p || specs->complex_p)
12673 : 21 : error_at (loc, "two or more data types in declaration specifiers");
12674 : 216434888 : else if (TREE_CODE (type) == TYPE_DECL)
12675 : : {
12676 : 213506646 : specs->type = TREE_TYPE (type);
12677 : 213506646 : if (TREE_TYPE (type) != error_mark_node)
12678 : : {
12679 : 213506633 : specs->decl_attr = DECL_ATTRIBUTES (type);
12680 : 213506633 : specs->typedef_p = true;
12681 : 213506633 : specs->explicit_signed_p = C_TYPEDEF_EXPLICITLY_SIGNED (type);
12682 : 213506633 : specs->locations[cdw_typedef] = loc;
12683 : :
12684 : : /* If this typedef name is defined in a struct, then a C++
12685 : : lookup would return a different value. */
12686 : 213506633 : if (warn_cxx_compat
12687 : 213506633 : && I_SYMBOL_BINDING (DECL_NAME (type))->in_struct)
12688 : 2 : warning_at (loc, OPT_Wc___compat,
12689 : : "C++ lookup of %qD would return a field, not a type",
12690 : : type);
12691 : :
12692 : : /* If we are parsing a struct, record that a struct field
12693 : : used a typedef. */
12694 : 213506633 : if (warn_cxx_compat && struct_parse_info != NULL)
12695 : 1444 : struct_parse_info->typedefs_seen.safe_push (type);
12696 : : }
12697 : : }
12698 : 2928242 : else if (TREE_CODE (type) == IDENTIFIER_NODE)
12699 : : {
12700 : 0 : tree t = lookup_name (type);
12701 : 0 : if (!t || TREE_CODE (t) != TYPE_DECL)
12702 : 0 : error_at (loc, "%qE fails to be a typedef or built in type", type);
12703 : 0 : else if (TREE_TYPE (t) == error_mark_node)
12704 : : ;
12705 : : else
12706 : : {
12707 : 0 : specs->type = TREE_TYPE (t);
12708 : 0 : specs->locations[cdw_typespec] = loc;
12709 : : }
12710 : : }
12711 : : else
12712 : : {
12713 : 2928242 : if (TREE_CODE (type) != ERROR_MARK)
12714 : : {
12715 : 2928061 : if (spec.kind == ctsk_typeof)
12716 : : {
12717 : 685218 : specs->typedef_p = true;
12718 : 685218 : specs->locations[cdw_typedef] = loc;
12719 : : }
12720 : 2928061 : if (spec.expr)
12721 : : {
12722 : 826 : if (specs->expr)
12723 : 0 : specs->expr = build2 (COMPOUND_EXPR, TREE_TYPE (spec.expr),
12724 : : specs->expr, spec.expr);
12725 : : else
12726 : 826 : specs->expr = spec.expr;
12727 : 826 : specs->expr_const_operands &= spec.expr_const_operands;
12728 : : }
12729 : : }
12730 : 2928242 : specs->type = type;
12731 : 2928242 : if (spec.has_enum_type_specifier
12732 : 158 : && spec.kind != ctsk_tagdef)
12733 : 49 : specs->enum_type_specifier_ref_p = true;
12734 : : }
12735 : :
12736 : : return specs;
12737 : : }
12738 : :
12739 : : /* Add the storage class specifier or function specifier SCSPEC to the
12740 : : declaration specifiers SPECS, returning SPECS. */
12741 : :
12742 : : struct c_declspecs *
12743 : 78780584 : declspecs_add_scspec (location_t loc,
12744 : : struct c_declspecs *specs,
12745 : : tree scspec)
12746 : : {
12747 : 78780584 : enum rid i;
12748 : 78780584 : enum c_storage_class n = csc_none;
12749 : 78780584 : bool dupe = false;
12750 : 78780584 : specs->declspecs_seen_p = true;
12751 : 78780584 : specs->non_std_attrs_seen_p = true;
12752 : 78780584 : gcc_assert (TREE_CODE (scspec) == IDENTIFIER_NODE
12753 : : && C_IS_RESERVED_WORD (scspec));
12754 : 78780584 : i = C_RID_CODE (scspec);
12755 : 78780584 : if (specs->non_sc_seen_p)
12756 : 2076 : warning (OPT_Wold_style_declaration,
12757 : : "%qE is not at beginning of declaration", scspec);
12758 : 78780584 : switch (i)
12759 : : {
12760 : 31106422 : case RID_INLINE:
12761 : : /* C99 permits duplicate inline. Although of doubtful utility,
12762 : : it seems simplest to permit it in gnu89 mode as well, as
12763 : : there is also little utility in maintaining this as a
12764 : : difference between gnu89 and C99 inline. */
12765 : 31106422 : dupe = false;
12766 : 31106422 : specs->inline_p = true;
12767 : 31106422 : specs->locations[cdw_inline] = loc;
12768 : 31106422 : break;
12769 : 19829 : case RID_NORETURN:
12770 : : /* Duplicate _Noreturn is permitted. */
12771 : 19829 : dupe = false;
12772 : 19829 : specs->noreturn_p = true;
12773 : 19829 : specs->locations[cdw_noreturn] = loc;
12774 : 19829 : break;
12775 : 2826 : case RID_THREAD:
12776 : 2826 : dupe = specs->thread_p;
12777 : 2826 : if (specs->storage_class == csc_auto)
12778 : 2 : error ("%qE used with %<auto%>", scspec);
12779 : 2824 : else if (specs->storage_class == csc_register)
12780 : 3 : error ("%qE used with %<register%>", scspec);
12781 : 2821 : else if (specs->storage_class == csc_typedef)
12782 : 2 : error ("%qE used with %<typedef%>", scspec);
12783 : 2819 : else if (specs->constexpr_p)
12784 : 2 : error ("%qE used with %<constexpr%>", scspec);
12785 : : else
12786 : : {
12787 : 2817 : specs->thread_p = true;
12788 : 2817 : specs->thread_gnu_p = (strcmp (IDENTIFIER_POINTER (scspec),
12789 : 2817 : "__thread") == 0);
12790 : : /* A diagnostic is not required for the use of this
12791 : : identifier in the implementation namespace; only diagnose
12792 : : it for the C11 spelling because of existing code using
12793 : : the other spelling. */
12794 : 2817 : if (!specs->thread_gnu_p)
12795 : : {
12796 : 91 : if (flag_isoc99)
12797 : 88 : pedwarn_c99 (loc, OPT_Wpedantic,
12798 : : "ISO C99 does not support %qE", scspec);
12799 : : else
12800 : 3 : pedwarn_c99 (loc, OPT_Wpedantic,
12801 : : "ISO C90 does not support %qE", scspec);
12802 : : }
12803 : 2817 : specs->locations[cdw_thread] = loc;
12804 : : }
12805 : : break;
12806 : 233 : case RID_AUTO:
12807 : 233 : if (flag_isoc23
12808 : 90 : && specs->typespec_kind == ctsk_none
12809 : 82 : && specs->storage_class != csc_typedef)
12810 : : {
12811 : : /* "auto" potentially used for type deduction. */
12812 : 81 : if (specs->c23_auto_p)
12813 : 1 : error ("duplicate %qE", scspec);
12814 : 81 : specs->c23_auto_p = true;
12815 : 81 : return specs;
12816 : : }
12817 : 152 : n = csc_auto;
12818 : : /* auto may only be used with another storage class specifier,
12819 : : such as constexpr, if the type is inferred. */
12820 : 152 : if (specs->constexpr_p)
12821 : 2 : error ("%qE used with %<constexpr%>", scspec);
12822 : : break;
12823 : 43247051 : case RID_EXTERN:
12824 : 43247051 : n = csc_extern;
12825 : : /* Diagnose "__thread extern". */
12826 : 43247051 : if (specs->thread_p && specs->thread_gnu_p)
12827 : 2 : error ("%<__thread%> before %<extern%>");
12828 : : break;
12829 : : case RID_REGISTER:
12830 : : n = csc_register;
12831 : : break;
12832 : 407581 : case RID_STATIC:
12833 : 407581 : n = csc_static;
12834 : : /* Diagnose "__thread static". */
12835 : 407581 : if (specs->thread_p && specs->thread_gnu_p)
12836 : 1 : error ("%<__thread%> before %<static%>");
12837 : : break;
12838 : 3993001 : case RID_TYPEDEF:
12839 : 3993001 : n = csc_typedef;
12840 : 3993001 : if (specs->c23_auto_p)
12841 : : {
12842 : 1 : error ("%<typedef%> used with %<auto%>");
12843 : 1 : specs->c23_auto_p = false;
12844 : : }
12845 : : break;
12846 : 576 : case RID_CONSTEXPR:
12847 : 576 : dupe = specs->constexpr_p;
12848 : 576 : if (specs->storage_class == csc_extern)
12849 : 1 : error ("%qE used with %<extern%>", scspec);
12850 : 575 : else if (specs->storage_class == csc_typedef)
12851 : 1 : error ("%qE used with %<typedef%>", scspec);
12852 : 574 : else if (specs->storage_class == csc_auto)
12853 : : /* auto may only be used with another storage class specifier,
12854 : : such as constexpr, if the type is inferred. */
12855 : 2 : error ("%qE used with %<auto%>", scspec);
12856 : 572 : else if (specs->thread_p)
12857 : 4 : error ("%qE used with %qs", scspec,
12858 : 2 : specs->thread_gnu_p ? "__thread" : "_Thread_local");
12859 : : else
12860 : 570 : specs->constexpr_p = true;
12861 : : break;
12862 : 0 : default:
12863 : 0 : gcc_unreachable ();
12864 : : }
12865 : 78780509 : if (n != csc_none && n == specs->storage_class)
12866 : : dupe = true;
12867 : 78780494 : if (dupe)
12868 : : {
12869 : 13 : if (i == RID_THREAD)
12870 : 2 : error ("duplicate %<_Thread_local%> or %<__thread%>");
12871 : : else
12872 : 11 : error ("duplicate %qE", scspec);
12873 : : }
12874 : 78780503 : if (n != csc_none)
12875 : : {
12876 : 47650850 : if (specs->storage_class != csc_none && n != specs->storage_class)
12877 : : {
12878 : 7 : error ("multiple storage classes in declaration specifiers");
12879 : : }
12880 : : else
12881 : : {
12882 : 47650843 : specs->storage_class = n;
12883 : 47650843 : specs->locations[cdw_storage_class] = loc;
12884 : 47650843 : if (n != csc_extern && n != csc_static && specs->thread_p)
12885 : : {
12886 : 8 : error ("%qs used with %qE",
12887 : 8 : specs->thread_gnu_p ? "__thread" : "_Thread_local",
12888 : : scspec);
12889 : 8 : specs->thread_p = false;
12890 : : }
12891 : 47650843 : if (n != csc_auto && n != csc_register && n != csc_static
12892 : 47240049 : && specs->constexpr_p)
12893 : : {
12894 : 2 : error ("%<constexpr%> used with %qE", scspec);
12895 : 2 : specs->constexpr_p = false;
12896 : : }
12897 : : }
12898 : : }
12899 : : return specs;
12900 : : }
12901 : :
12902 : : /* Add the attributes ATTRS to the declaration specifiers SPECS,
12903 : : returning SPECS. */
12904 : :
12905 : : struct c_declspecs *
12906 : 31400789 : declspecs_add_attrs (location_t loc, struct c_declspecs *specs, tree attrs)
12907 : : {
12908 : 31400789 : specs->attrs = chainon (attrs, specs->attrs);
12909 : 31400789 : specs->locations[cdw_attributes] = loc;
12910 : 31400789 : specs->declspecs_seen_p = true;
12911 : : /* In the case of standard attributes at the start of the
12912 : : declaration, the caller will reset this. */
12913 : 31400789 : specs->non_std_attrs_seen_p = true;
12914 : 31400789 : return specs;
12915 : : }
12916 : :
12917 : : /* Add an _Alignas specifier (expression ALIGN, or type whose
12918 : : alignment is ALIGN) to the declaration specifiers SPECS, returning
12919 : : SPECS. */
12920 : : struct c_declspecs *
12921 : 194 : declspecs_add_alignas (location_t loc,
12922 : : struct c_declspecs *specs, tree align)
12923 : : {
12924 : 194 : specs->alignas_p = true;
12925 : 194 : specs->locations[cdw_alignas] = loc;
12926 : 194 : if (align == error_mark_node)
12927 : : return specs;
12928 : :
12929 : : /* Only accept the alignment if it's valid and greater than
12930 : : the current one. Zero is invalid but by C11 required to
12931 : : be silently ignored. */
12932 : 192 : int align_log = check_user_alignment (align, false, /* warn_zero = */false);
12933 : 192 : if (align_log > specs->align_log)
12934 : 159 : specs->align_log = align_log;
12935 : : return specs;
12936 : : }
12937 : :
12938 : : /* Combine "long", "short", "signed", "unsigned" and "_Complex" type
12939 : : specifiers with any other type specifier to determine the resulting
12940 : : type. This is where ISO C checks on complex types are made, since
12941 : : "_Complex long" is a prefix of the valid ISO C type "_Complex long
12942 : : double". Also apply postfix standard attributes to modify the type. */
12943 : :
12944 : : struct c_declspecs *
12945 : 274409330 : finish_declspecs (struct c_declspecs *specs)
12946 : : {
12947 : : /* If a type was specified as a whole, we have no modifiers and are
12948 : : done. */
12949 : 274409330 : if (specs->type != NULL_TREE)
12950 : : {
12951 : 216434845 : gcc_assert (!specs->long_p && !specs->long_long_p && !specs->short_p
12952 : : && !specs->signed_p && !specs->unsigned_p
12953 : : && !specs->complex_p && !specs->c23_auto_p);
12954 : :
12955 : : /* Set a dummy type. */
12956 : 216434845 : if (TREE_CODE (specs->type) == ERROR_MARK)
12957 : 160 : specs->type = integer_type_node;
12958 : 216434845 : goto handle_postfix_attrs;
12959 : : }
12960 : :
12961 : : /* If none of "void", "_Bool", "char", "int", "float" or "double"
12962 : : has been specified, treat it as "int" unless "_Complex" is
12963 : : present and there are no other specifiers. If we just have
12964 : : "_Complex", it is equivalent to "_Complex double", but e.g.
12965 : : "_Complex short" is equivalent to "_Complex short int". */
12966 : 57974485 : if (specs->typespec_word == cts_none)
12967 : : {
12968 : 3963929 : if (specs->saturating_p)
12969 : : {
12970 : 1 : error_at (specs->locations[cdw_saturating],
12971 : : "%<_Sat%> is used without %<_Fract%> or %<_Accum%>");
12972 : 1 : if (!targetm.fixed_point_supported_p ())
12973 : 1 : error_at (specs->locations[cdw_saturating],
12974 : : "fixed-point types not supported for this target");
12975 : 1 : specs->typespec_word = cts_fract;
12976 : : }
12977 : 3963928 : else if (specs->long_p || specs->short_p
12978 : 3963928 : || specs->signed_p || specs->unsigned_p)
12979 : : {
12980 : 3953678 : specs->typespec_word = cts_int;
12981 : : }
12982 : 10250 : else if (specs->complex_p)
12983 : : {
12984 : 129 : specs->typespec_word = cts_double;
12985 : 129 : pedwarn (specs->locations[cdw_complex], OPT_Wpedantic,
12986 : : "ISO C does not support plain %<complex%> meaning "
12987 : : "%<double complex%>");
12988 : : }
12989 : 10121 : else if (specs->c23_auto_p)
12990 : : {
12991 : : /* Type to be filled in later, including applying postfix
12992 : : attributes. This warning only actually appears for
12993 : : -Wc11-c23-compat in C23 mode; in older modes, there may
12994 : : be a warning or pedwarn for implicit "int" instead, or
12995 : : other errors for use of auto at file scope. */
12996 : 69 : pedwarn_c11 (input_location, OPT_Wpedantic,
12997 : : "ISO C does not support %<auto%> type deduction "
12998 : : "before C23");
12999 : 69 : return specs;
13000 : : }
13001 : : else
13002 : : {
13003 : 10052 : specs->typespec_word = cts_int;
13004 : 10052 : specs->default_int_p = true;
13005 : : /* We don't diagnose this here because grokdeclarator will
13006 : : give more specific diagnostics according to whether it is
13007 : : a function definition. */
13008 : : }
13009 : : }
13010 : :
13011 : : /* If "signed" was specified, record this to distinguish "int" and
13012 : : "signed int" in the case of a bit-field with
13013 : : -funsigned-bitfields. */
13014 : 57974416 : specs->explicit_signed_p = specs->signed_p;
13015 : :
13016 : : /* Now compute the actual type. */
13017 : 57974416 : gcc_assert (!specs->c23_auto_p);
13018 : 57974416 : switch (specs->typespec_word)
13019 : : {
13020 : 1788 : case cts_auto_type:
13021 : 1788 : gcc_assert (!specs->long_p && !specs->short_p
13022 : : && !specs->signed_p && !specs->unsigned_p
13023 : : && !specs->complex_p);
13024 : : /* Type to be filled in later. */
13025 : 1788 : if (specs->postfix_attrs)
13026 : 2 : error ("%<__auto_type%> followed by %<[[]]%> attributes");
13027 : : break;
13028 : 7366750 : case cts_void:
13029 : 7366750 : gcc_assert (!specs->long_p && !specs->short_p
13030 : : && !specs->signed_p && !specs->unsigned_p
13031 : : && !specs->complex_p);
13032 : 7366750 : specs->type = void_type_node;
13033 : 7366750 : break;
13034 : 75542 : case cts_bool:
13035 : 75542 : gcc_assert (!specs->long_p && !specs->short_p
13036 : : && !specs->signed_p && !specs->unsigned_p
13037 : : && !specs->complex_p);
13038 : 75542 : specs->type = boolean_type_node;
13039 : 75542 : break;
13040 : 8483990 : case cts_char:
13041 : 8483990 : gcc_assert (!specs->long_p && !specs->short_p);
13042 : 8483990 : gcc_assert (!(specs->signed_p && specs->unsigned_p));
13043 : 8483990 : if (specs->signed_p)
13044 : 184012 : specs->type = signed_char_type_node;
13045 : 8299978 : else if (specs->unsigned_p)
13046 : 872251 : specs->type = unsigned_char_type_node;
13047 : : else
13048 : 7427727 : specs->type = char_type_node;
13049 : 8483990 : if (specs->complex_p)
13050 : : {
13051 : 3844 : pedwarn (specs->locations[cdw_complex], OPT_Wpedantic,
13052 : : "ISO C does not support complex integer types");
13053 : 3844 : specs->type = build_complex_type (specs->type);
13054 : : }
13055 : : break;
13056 : 50895 : case cts_int_n:
13057 : 50895 : gcc_assert (!specs->long_p && !specs->short_p && !specs->long_long_p);
13058 : 50895 : gcc_assert (!(specs->signed_p && specs->unsigned_p));
13059 : 50895 : if (! int_n_enabled_p[specs->u.int_n_idx])
13060 : 0 : specs->type = integer_type_node;
13061 : : else
13062 : 50895 : specs->type = (specs->unsigned_p
13063 : 50895 : ? int_n_trees[specs->u.int_n_idx].unsigned_type
13064 : : : int_n_trees[specs->u.int_n_idx].signed_type);
13065 : 50895 : if (specs->complex_p)
13066 : : {
13067 : 199 : pedwarn (specs->locations[cdw_complex], OPT_Wpedantic,
13068 : : "ISO C does not support complex integer types");
13069 : 199 : specs->type = build_complex_type (specs->type);
13070 : : }
13071 : : break;
13072 : 25522159 : case cts_int:
13073 : 25522159 : gcc_assert (!(specs->long_p && specs->short_p));
13074 : 25522159 : gcc_assert (!(specs->signed_p && specs->unsigned_p));
13075 : 25522159 : if (specs->long_long_p)
13076 : 2516180 : specs->type = (specs->unsigned_p
13077 : 2516180 : ? long_long_unsigned_type_node
13078 : : : long_long_integer_type_node);
13079 : 23005979 : else if (specs->long_p)
13080 : 2023059 : specs->type = (specs->unsigned_p
13081 : 2023059 : ? long_unsigned_type_node
13082 : : : long_integer_type_node);
13083 : 20982920 : else if (specs->short_p)
13084 : 1623051 : specs->type = (specs->unsigned_p
13085 : 1623051 : ? short_unsigned_type_node
13086 : : : short_integer_type_node);
13087 : : else
13088 : 19359869 : specs->type = (specs->unsigned_p
13089 : 19359869 : ? unsigned_type_node
13090 : : : integer_type_node);
13091 : 25522159 : if (specs->complex_p)
13092 : : {
13093 : 14889 : pedwarn (specs->locations[cdw_complex], OPT_Wpedantic,
13094 : : "ISO C does not support complex integer types");
13095 : 14889 : specs->type = build_complex_type (specs->type);
13096 : : }
13097 : : break;
13098 : 2862898 : case cts_float:
13099 : 2862898 : gcc_assert (!specs->long_p && !specs->short_p
13100 : : && !specs->signed_p && !specs->unsigned_p);
13101 : 5725796 : specs->type = (specs->complex_p
13102 : 2862898 : ? complex_float_type_node
13103 : : : float_type_node);
13104 : 2862898 : break;
13105 : 5032331 : case cts_double:
13106 : 5032331 : gcc_assert (!specs->long_long_p && !specs->short_p
13107 : : && !specs->signed_p && !specs->unsigned_p);
13108 : 5032331 : if (specs->long_p)
13109 : : {
13110 : 2092723 : specs->type = (specs->complex_p
13111 : 2092723 : ? complex_long_double_type_node
13112 : : : long_double_type_node);
13113 : : }
13114 : : else
13115 : : {
13116 : 2939608 : specs->type = (specs->complex_p
13117 : 2939608 : ? complex_double_type_node
13118 : : : double_type_node);
13119 : : }
13120 : : break;
13121 : 8485658 : case cts_floatn_nx:
13122 : 8485658 : gcc_assert (!specs->long_p && !specs->short_p
13123 : : && !specs->signed_p && !specs->unsigned_p);
13124 : 8485658 : if (FLOATN_NX_TYPE_NODE (specs->u.floatn_nx_idx) == NULL_TREE)
13125 : 88 : specs->type = integer_type_node;
13126 : 8485570 : else if (specs->complex_p)
13127 : 1366461 : specs->type = COMPLEX_FLOATN_NX_TYPE_NODE (specs->u.floatn_nx_idx);
13128 : : else
13129 : 7119109 : specs->type = FLOATN_NX_TYPE_NODE (specs->u.floatn_nx_idx);
13130 : : break;
13131 : 47436 : case cts_dfloat32:
13132 : 47436 : case cts_dfloat64:
13133 : 47436 : case cts_dfloat128:
13134 : 47436 : gcc_assert (!specs->long_p && !specs->long_long_p && !specs->short_p
13135 : : && !specs->signed_p && !specs->unsigned_p && !specs->complex_p);
13136 : 47436 : if (!targetm.decimal_float_supported_p ())
13137 : 0 : specs->type = integer_type_node;
13138 : 47436 : else if (specs->typespec_word == cts_dfloat32)
13139 : 15881 : specs->type = dfloat32_type_node;
13140 : 31555 : else if (specs->typespec_word == cts_dfloat64)
13141 : 15827 : specs->type = dfloat64_type_node;
13142 : : else
13143 : 15728 : specs->type = dfloat128_type_node;
13144 : : break;
13145 : 69 : case cts_fract:
13146 : 69 : gcc_assert (!specs->complex_p);
13147 : 69 : if (!targetm.fixed_point_supported_p ())
13148 : 69 : specs->type = integer_type_node;
13149 : 0 : else if (specs->saturating_p)
13150 : : {
13151 : 0 : if (specs->long_long_p)
13152 : 0 : specs->type = specs->unsigned_p
13153 : 0 : ? sat_unsigned_long_long_fract_type_node
13154 : : : sat_long_long_fract_type_node;
13155 : 0 : else if (specs->long_p)
13156 : 0 : specs->type = specs->unsigned_p
13157 : 0 : ? sat_unsigned_long_fract_type_node
13158 : : : sat_long_fract_type_node;
13159 : 0 : else if (specs->short_p)
13160 : 0 : specs->type = specs->unsigned_p
13161 : 0 : ? sat_unsigned_short_fract_type_node
13162 : : : sat_short_fract_type_node;
13163 : : else
13164 : 0 : specs->type = specs->unsigned_p
13165 : 0 : ? sat_unsigned_fract_type_node
13166 : : : sat_fract_type_node;
13167 : : }
13168 : : else
13169 : : {
13170 : 0 : if (specs->long_long_p)
13171 : 0 : specs->type = specs->unsigned_p
13172 : 0 : ? unsigned_long_long_fract_type_node
13173 : : : long_long_fract_type_node;
13174 : 0 : else if (specs->long_p)
13175 : 0 : specs->type = specs->unsigned_p
13176 : 0 : ? unsigned_long_fract_type_node
13177 : : : long_fract_type_node;
13178 : 0 : else if (specs->short_p)
13179 : 0 : specs->type = specs->unsigned_p
13180 : 0 : ? unsigned_short_fract_type_node
13181 : : : short_fract_type_node;
13182 : : else
13183 : 0 : specs->type = specs->unsigned_p
13184 : 0 : ? unsigned_fract_type_node
13185 : : : fract_type_node;
13186 : : }
13187 : : break;
13188 : 67 : case cts_accum:
13189 : 67 : gcc_assert (!specs->complex_p);
13190 : 67 : if (!targetm.fixed_point_supported_p ())
13191 : 67 : specs->type = integer_type_node;
13192 : 0 : else if (specs->saturating_p)
13193 : : {
13194 : 0 : if (specs->long_long_p)
13195 : 0 : specs->type = specs->unsigned_p
13196 : 0 : ? sat_unsigned_long_long_accum_type_node
13197 : : : sat_long_long_accum_type_node;
13198 : 0 : else if (specs->long_p)
13199 : 0 : specs->type = specs->unsigned_p
13200 : 0 : ? sat_unsigned_long_accum_type_node
13201 : : : sat_long_accum_type_node;
13202 : 0 : else if (specs->short_p)
13203 : 0 : specs->type = specs->unsigned_p
13204 : 0 : ? sat_unsigned_short_accum_type_node
13205 : : : sat_short_accum_type_node;
13206 : : else
13207 : 0 : specs->type = specs->unsigned_p
13208 : 0 : ? sat_unsigned_accum_type_node
13209 : : : sat_accum_type_node;
13210 : : }
13211 : : else
13212 : : {
13213 : 0 : if (specs->long_long_p)
13214 : 0 : specs->type = specs->unsigned_p
13215 : 0 : ? unsigned_long_long_accum_type_node
13216 : : : long_long_accum_type_node;
13217 : 0 : else if (specs->long_p)
13218 : 0 : specs->type = specs->unsigned_p
13219 : 0 : ? unsigned_long_accum_type_node
13220 : : : long_accum_type_node;
13221 : 0 : else if (specs->short_p)
13222 : 0 : specs->type = specs->unsigned_p
13223 : 0 : ? unsigned_short_accum_type_node
13224 : : : short_accum_type_node;
13225 : : else
13226 : 0 : specs->type = specs->unsigned_p
13227 : 0 : ? unsigned_accum_type_node
13228 : : : accum_type_node;
13229 : : }
13230 : : break;
13231 : 44833 : case cts_bitint:
13232 : 44833 : gcc_assert (!specs->long_p && !specs->short_p
13233 : : && !specs->complex_p);
13234 : 44833 : if (!specs->unsigned_p && specs->u.bitint_prec == 1)
13235 : : {
13236 : 2 : error_at (specs->locations[cdw_typespec],
13237 : : "%<signed _BitInt%> argument must be at least 2");
13238 : 2 : specs->type = integer_type_node;
13239 : 2 : break;
13240 : : }
13241 : 44831 : if (specs->u.bitint_prec == -1)
13242 : 7 : specs->type = integer_type_node;
13243 : : else
13244 : : {
13245 : 66101 : pedwarn_c11 (specs->locations[cdw_typespec], OPT_Wpedantic,
13246 : : "ISO C does not support %<%s_BitInt(%d)%> before C23",
13247 : : specs->unsigned_p ? "unsigned "
13248 : 21277 : : specs->signed_p ? "signed " : "",
13249 : : specs->u.bitint_prec);
13250 : 44824 : specs->type = build_bitint_type (specs->u.bitint_prec,
13251 : 44824 : specs->unsigned_p);
13252 : : }
13253 : : break;
13254 : 0 : default:
13255 : 0 : gcc_unreachable ();
13256 : : }
13257 : 274409261 : handle_postfix_attrs:
13258 : 274409261 : if (specs->type != NULL)
13259 : : {
13260 : 274407473 : specs->postfix_attrs = c_warn_type_attributes (specs->postfix_attrs);
13261 : 274407473 : decl_attributes (&specs->type, specs->postfix_attrs, 0);
13262 : 274407473 : specs->postfix_attrs = NULL_TREE;
13263 : : }
13264 : :
13265 : : return specs;
13266 : : }
13267 : :
13268 : : /* Perform final processing on one file scope's declarations (or the
13269 : : external scope's declarations), GLOBALS. */
13270 : :
13271 : : static void
13272 : 206100 : c_write_global_declarations_1 (tree globals)
13273 : : {
13274 : 206100 : tree decl;
13275 : 206100 : bool reconsider;
13276 : :
13277 : : /* Process the decls in the order they were written. */
13278 : 350613421 : for (decl = globals; decl; decl = DECL_CHAIN (decl))
13279 : : {
13280 : : /* Check for used but undefined static functions using the C
13281 : : standard's definition of "used", and set TREE_NO_WARNING so
13282 : : that check_global_declaration doesn't repeat the check. */
13283 : 350407321 : if (TREE_CODE (decl) == FUNCTION_DECL
13284 : 333371176 : && DECL_INITIAL (decl) == NULL_TREE
13285 : 301607125 : && DECL_EXTERNAL (decl)
13286 : 652014441 : && !TREE_PUBLIC (decl))
13287 : : {
13288 : 109 : if (C_DECL_USED (decl))
13289 : : {
13290 : : /* TODO: Add OPT_Wundefined-inline. */
13291 : 19 : if (pedwarn (input_location, 0, "%q+F used but never defined",
13292 : : decl))
13293 : 18 : suppress_warning (decl /* OPT_Wundefined-inline. */);
13294 : : }
13295 : : /* For -Wunused-function warn about unused static prototypes. */
13296 : 90 : else if (warn_unused_function
13297 : 1 : && ! DECL_ARTIFICIAL (decl)
13298 : 91 : && ! warning_suppressed_p (decl, OPT_Wunused_function))
13299 : : {
13300 : 1 : if (warning (OPT_Wunused_function,
13301 : : "%q+F declared %<static%> but never defined",
13302 : : decl))
13303 : 1 : suppress_warning (decl, OPT_Wunused_function);
13304 : : }
13305 : : }
13306 : :
13307 : 350407321 : wrapup_global_declaration_1 (decl);
13308 : : }
13309 : :
13310 : 238018 : do
13311 : : {
13312 : 238018 : reconsider = false;
13313 : 450682404 : for (decl = globals; decl; decl = DECL_CHAIN (decl))
13314 : 450444386 : reconsider |= wrapup_global_declaration_2 (decl);
13315 : : }
13316 : : while (reconsider);
13317 : 206100 : }
13318 : :
13319 : : /* Preserve the external declarations scope across a garbage collect. */
13320 : : static GTY(()) tree ext_block;
13321 : :
13322 : : /* Collect all references relevant to SOURCE_FILE. */
13323 : :
13324 : : static void
13325 : 15 : collect_all_refs (const char *source_file)
13326 : : {
13327 : 15 : tree t;
13328 : 15 : unsigned i;
13329 : :
13330 : 30 : FOR_EACH_VEC_ELT (*all_translation_units, i, t)
13331 : 15 : collect_ada_nodes (BLOCK_VARS (DECL_INITIAL (t)), source_file);
13332 : :
13333 : 15 : collect_ada_nodes (BLOCK_VARS (ext_block), source_file);
13334 : 15 : }
13335 : :
13336 : : /* Collect source file references at global level. */
13337 : :
13338 : : static void
13339 : 15 : collect_source_refs (void)
13340 : : {
13341 : 15 : tree t;
13342 : 15 : tree decls;
13343 : 15 : tree decl;
13344 : 15 : unsigned i;
13345 : :
13346 : 30 : FOR_EACH_VEC_ELT (*all_translation_units, i, t)
13347 : : {
13348 : 15 : decls = DECL_INITIAL (t);
13349 : 82 : for (decl = BLOCK_VARS (decls); decl; decl = TREE_CHAIN (decl))
13350 : 67 : if (!DECL_IS_UNDECLARED_BUILTIN (decl))
13351 : 67 : collect_source_ref (DECL_SOURCE_FILE (decl));
13352 : : }
13353 : :
13354 : 41336 : for (decl = BLOCK_VARS (ext_block); decl; decl = TREE_CHAIN (decl))
13355 : 41321 : if (!DECL_IS_UNDECLARED_BUILTIN (decl))
13356 : 11 : collect_source_ref (DECL_SOURCE_FILE (decl));
13357 : 15 : }
13358 : :
13359 : : /* Free attribute access data that are not needed by the middle end. */
13360 : :
13361 : : static void
13362 : 103050 : free_attr_access_data ()
13363 : : {
13364 : 103050 : struct cgraph_node *n;
13365 : :
13366 : : /* Iterate over all functions declared in the translation unit. */
13367 : 63737304 : FOR_EACH_FUNCTION (n)
13368 : : {
13369 : 119663508 : for (tree parm = DECL_ARGUMENTS (n->decl); parm; parm = TREE_CHAIN (parm))
13370 : 87897906 : if (tree attrs = DECL_ATTRIBUTES (parm))
13371 : 94272 : attr_access::free_lang_data (attrs);
13372 : :
13373 : 31765602 : tree fntype = TREE_TYPE (n->decl);
13374 : 31765602 : if (!fntype || fntype == error_mark_node)
13375 : 0 : continue;
13376 : 31765602 : tree attrs = TYPE_ATTRIBUTES (fntype);
13377 : 31765602 : if (!attrs)
13378 : 31538476 : continue;
13379 : :
13380 : 227126 : attr_access::free_lang_data (attrs);
13381 : : }
13382 : 103050 : }
13383 : :
13384 : : /* Perform any final parser cleanups and generate initial debugging
13385 : : information. */
13386 : :
13387 : : void
13388 : 103411 : c_parse_final_cleanups (void)
13389 : : {
13390 : 103411 : tree t;
13391 : 103411 : unsigned i;
13392 : :
13393 : : /* We don't want to do this if generating a PCH. */
13394 : 103411 : if (pch_file)
13395 : 103411 : return;
13396 : :
13397 : 103050 : timevar_stop (TV_PHASE_PARSING);
13398 : 103050 : timevar_start (TV_PHASE_DEFERRED);
13399 : :
13400 : : /* Do the Objective-C stuff. This is where all the Objective-C
13401 : : module stuff gets generated (symtab, class/protocol/selector
13402 : : lists etc). */
13403 : 103050 : if (c_dialect_objc ())
13404 : 0 : objc_write_global_declarations ();
13405 : :
13406 : : /* Close the external scope. */
13407 : 103050 : ext_block = pop_scope ();
13408 : 103050 : external_scope = 0;
13409 : 103050 : gcc_assert (!current_scope);
13410 : :
13411 : : /* Handle -fdump-ada-spec[-slim]. */
13412 : 103050 : if (flag_dump_ada_spec || flag_dump_ada_spec_slim)
13413 : : {
13414 : : /* Build a table of files to generate specs for */
13415 : 15 : collect_source_ref (main_input_filename);
13416 : 15 : if (!flag_dump_ada_spec_slim)
13417 : 15 : collect_source_refs ();
13418 : :
13419 : 15 : dump_ada_specs (collect_all_refs, NULL);
13420 : : }
13421 : :
13422 : : /* Process all file scopes in this compilation, and the external_scope,
13423 : : through wrapup_global_declarations. */
13424 : 206100 : FOR_EACH_VEC_ELT (*all_translation_units, i, t)
13425 : 103050 : c_write_global_declarations_1 (BLOCK_VARS (DECL_INITIAL (t)));
13426 : 103050 : c_write_global_declarations_1 (BLOCK_VARS (ext_block));
13427 : :
13428 : 103050 : if (!in_lto_p)
13429 : 103050 : free_attr_access_data ();
13430 : :
13431 : 103050 : timevar_stop (TV_PHASE_DEFERRED);
13432 : 103050 : timevar_start (TV_PHASE_PARSING);
13433 : :
13434 : 103050 : ext_block = NULL;
13435 : : }
13436 : :
13437 : : /* Register reserved keyword WORD as qualifier for address space AS. */
13438 : :
13439 : : void
13440 : 215956 : c_register_addr_space (const char *word, addr_space_t as)
13441 : : {
13442 : 215956 : int rid = RID_FIRST_ADDR_SPACE + as;
13443 : 215956 : tree id;
13444 : :
13445 : : /* Address space qualifiers are only supported
13446 : : in C with GNU extensions enabled. */
13447 : 215956 : if (c_dialect_objc () || flag_no_asm)
13448 : : return;
13449 : :
13450 : 206484 : id = get_identifier (word);
13451 : 206484 : C_SET_RID_CODE (id, rid);
13452 : 206484 : C_IS_RESERVED_WORD (id) = 1;
13453 : 206484 : ridpointers [rid] = id;
13454 : : }
13455 : :
13456 : : /* Return identifier to look up for omp declare reduction. */
13457 : :
13458 : : tree
13459 : 3028 : c_omp_reduction_id (enum tree_code reduction_code, tree reduction_id)
13460 : : {
13461 : 3028 : const char *p = NULL;
13462 : 3028 : switch (reduction_code)
13463 : : {
13464 : : case PLUS_EXPR: p = "+"; break;
13465 : 254 : case MULT_EXPR: p = "*"; break;
13466 : 105 : case MINUS_EXPR: p = "-"; break;
13467 : 29 : case BIT_AND_EXPR: p = "&"; break;
13468 : 12 : case BIT_XOR_EXPR: p = "^"; break;
13469 : 90 : case BIT_IOR_EXPR: p = "|"; break;
13470 : 65 : case TRUTH_ANDIF_EXPR: p = "&&"; break;
13471 : 76 : case TRUTH_ORIF_EXPR: p = "||"; break;
13472 : 44 : case MIN_EXPR: p = "min"; break;
13473 : 77 : case MAX_EXPR: p = "max"; break;
13474 : : default:
13475 : : break;
13476 : : }
13477 : :
13478 : 752 : if (p == NULL)
13479 : : {
13480 : 213 : if (TREE_CODE (reduction_id) != IDENTIFIER_NODE)
13481 : 0 : return error_mark_node;
13482 : 213 : p = IDENTIFIER_POINTER (reduction_id);
13483 : : }
13484 : :
13485 : 3028 : const char prefix[] = "omp declare reduction ";
13486 : 3028 : size_t lenp = sizeof (prefix);
13487 : 3028 : size_t len = strlen (p);
13488 : 3028 : char *name = XALLOCAVEC (char, lenp + len);
13489 : 3028 : memcpy (name, prefix, lenp - 1);
13490 : 3028 : memcpy (name + lenp - 1, p, len + 1);
13491 : 3028 : return get_identifier (name);
13492 : : }
13493 : :
13494 : : /* Lookup REDUCTION_ID in the current scope, or create an artificial
13495 : : VAR_DECL, bind it into the current scope and return it. */
13496 : :
13497 : : tree
13498 : 161 : c_omp_reduction_decl (tree reduction_id)
13499 : : {
13500 : 161 : struct c_binding *b = I_SYMBOL_BINDING (reduction_id);
13501 : 161 : if (b != NULL && B_IN_CURRENT_SCOPE (b))
13502 : 47 : return b->decl;
13503 : :
13504 : 114 : tree decl = build_decl (BUILTINS_LOCATION, VAR_DECL,
13505 : : reduction_id, integer_type_node);
13506 : 114 : DECL_ARTIFICIAL (decl) = 1;
13507 : 114 : DECL_EXTERNAL (decl) = 1;
13508 : 114 : TREE_STATIC (decl) = 1;
13509 : 114 : TREE_PUBLIC (decl) = 0;
13510 : 114 : bind (reduction_id, decl, current_scope, true, false, BUILTINS_LOCATION);
13511 : 114 : return decl;
13512 : : }
13513 : :
13514 : : /* Lookup REDUCTION_ID in the first scope where it has entry for TYPE. */
13515 : :
13516 : : tree
13517 : 273 : c_omp_reduction_lookup (tree reduction_id, tree type)
13518 : : {
13519 : 273 : struct c_binding *b = I_SYMBOL_BINDING (reduction_id);
13520 : 276 : while (b)
13521 : : {
13522 : 274 : tree t;
13523 : 294 : for (t = DECL_INITIAL (b->decl); t; t = TREE_CHAIN (t))
13524 : 291 : if (comptypes (TREE_PURPOSE (t), type))
13525 : 271 : return TREE_VALUE (t);
13526 : 3 : b = b->shadowed;
13527 : : }
13528 : 2 : return error_mark_node;
13529 : : }
13530 : :
13531 : : /* Helper function called via walk_tree, to diagnose invalid
13532 : : #pragma omp declare reduction combiners or initializers. */
13533 : :
13534 : : tree
13535 : 1401 : c_check_omp_declare_reduction_r (tree *tp, int *, void *data)
13536 : : {
13537 : 1401 : tree *vars = (tree *) data;
13538 : 1401 : if (SSA_VAR_P (*tp)
13539 : 413 : && !DECL_ARTIFICIAL (*tp)
13540 : 24 : && *tp != vars[0]
13541 : 24 : && *tp != vars[1])
13542 : : {
13543 : 24 : location_t loc = DECL_SOURCE_LOCATION (vars[0]);
13544 : 24 : if (strcmp (IDENTIFIER_POINTER (DECL_NAME (vars[0])), "omp_out") == 0)
13545 : 10 : error_at (loc, "%<#pragma omp declare reduction%> combiner refers to "
13546 : : "variable %qD which is not %<omp_out%> nor %<omp_in%>",
13547 : : *tp);
13548 : : else
13549 : 14 : error_at (loc, "%<#pragma omp declare reduction%> initializer refers "
13550 : : "to variable %qD which is not %<omp_priv%> nor "
13551 : : "%<omp_orig%>",
13552 : : *tp);
13553 : 24 : return *tp;
13554 : : }
13555 : : return NULL_TREE;
13556 : : }
13557 : :
13558 : :
13559 : : bool
13560 : 210 : c_check_in_current_scope (tree decl)
13561 : : {
13562 : 210 : struct c_binding *b = I_SYMBOL_BINDING (DECL_NAME (decl));
13563 : 210 : return b != NULL && B_IN_CURRENT_SCOPE (b);
13564 : : }
13565 : :
13566 : : #include "gt-c-c-decl.h"
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