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51e29401 | 1 | /* Process declarations and variables for C compiler. |
5624e564 | 2 | Copyright (C) 1988-2015 Free Software Foundation, Inc. |
51e29401 | 3 | |
1322177d | 4 | This file is part of GCC. |
51e29401 | 5 | |
1322177d LB |
6 | GCC is free software; you can redistribute it and/or modify it under |
7 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 9 | version. |
51e29401 | 10 | |
1322177d LB |
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
51e29401 RS |
15 | |
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
51e29401 | 19 | |
51e29401 RS |
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" | |
670ee920 | 28 | #include "system.h" |
4977bab6 | 29 | #include "coretypes.h" |
43e05e45 | 30 | #include "input.h" |
4977bab6 | 31 | #include "tm.h" |
993c790e | 32 | #include "intl.h" |
40e23961 MC |
33 | #include "hash-set.h" |
34 | #include "vec.h" | |
35 | #include "symtab.h" | |
36 | #include "input.h" | |
37 | #include "alias.h" | |
38 | #include "double-int.h" | |
39 | #include "machmode.h" | |
40 | #include "inchash.h" | |
51e29401 | 41 | #include "tree.h" |
40e23961 | 42 | #include "fold-const.h" |
d8a2d370 DN |
43 | #include "print-tree.h" |
44 | #include "stor-layout.h" | |
45 | #include "varasm.h" | |
46 | #include "attribs.h" | |
47 | #include "stringpool.h" | |
4838c5ee | 48 | #include "tree-inline.h" |
51e29401 | 49 | #include "flags.h" |
83685514 AM |
50 | #include "hashtab.h" |
51 | #include "hash-set.h" | |
52 | #include "vec.h" | |
53 | #include "machmode.h" | |
54 | #include "hard-reg-set.h" | |
49ad7cfa | 55 | #include "function.h" |
51e29401 | 56 | #include "c-tree.h" |
5f6da302 | 57 | #include "toplev.h" |
809d4ef1 | 58 | #include "tm_p.h" |
a0d85b75 | 59 | #include "cpplib.h" |
672a6f42 | 60 | #include "target.h" |
e1772ac0 | 61 | #include "debug.h" |
40e941af | 62 | #include "opts.h" |
b932f770 | 63 | #include "timevar.h" |
39dabefd | 64 | #include "c-family/c-common.h" |
61d3ce20 | 65 | #include "c-family/c-objc.h" |
39dabefd | 66 | #include "c-family/c-pragma.h" |
b906f4ca | 67 | #include "c-family/c-ubsan.h" |
29cc57cf | 68 | #include "c-lang.h" |
6de9cd9a | 69 | #include "langhooks.h" |
726a989a | 70 | #include "tree-iterator.h" |
1da2ed5f | 71 | #include "diagnostic-core.h" |
7ee2468b | 72 | #include "dumpfile.h" |
c582198b AM |
73 | #include "hash-map.h" |
74 | #include "is-a.h" | |
75 | #include "plugin-api.h" | |
76 | #include "ipa-ref.h" | |
1c4a429a | 77 | #include "cgraph.h" |
703c8606 | 78 | #include "hash-table.h" |
48873ed2 | 79 | #include "langhooks-def.h" |
68a607d8 | 80 | #include "plugin.h" |
39dabefd | 81 | #include "c-family/c-ada-spec.h" |
939b37da | 82 | #include "cilk.h" |
9b2b7279 | 83 | #include "builtins.h" |
a0d85b75 | 84 | |
51e29401 RS |
85 | /* In grokdeclarator, distinguish syntactic contexts of declarators. */ |
86 | enum decl_context | |
87 | { NORMAL, /* Ordinary declaration */ | |
88 | FUNCDEF, /* Function definition */ | |
89 | PARM, /* Declaration of parm before function body */ | |
90 | FIELD, /* Declaration inside struct or union */ | |
51e29401 RS |
91 | TYPENAME}; /* Typename (inside cast or sizeof) */ |
92 | ||
0da300cd TT |
93 | /* States indicating how grokdeclarator() should handle declspecs marked |
94 | with __attribute__((deprecated)). An object declared as | |
95 | __attribute__((deprecated)) suppresses warnings of uses of other | |
96 | deprecated items. */ | |
97 | ||
98 | enum deprecated_states { | |
99 | DEPRECATED_NORMAL, | |
100 | DEPRECATED_SUPPRESS | |
101 | }; | |
102 | ||
51e29401 | 103 | \f |
51e29401 RS |
104 | /* Nonzero if we have seen an invalid cross reference |
105 | to a struct, union, or enum, but not yet printed the message. */ | |
51e29401 | 106 | tree pending_invalid_xref; |
093c7153 | 107 | |
51e29401 | 108 | /* File and line to appear in the eventual error message. */ |
070588f0 | 109 | location_t pending_invalid_xref_location; |
51e29401 | 110 | |
77dbdb57 ZW |
111 | /* The file and line that the prototype came from if this is an |
112 | old-style definition; used for diagnostics in | |
113 | store_parm_decls_oldstyle. */ | |
eb1dfbb2 | 114 | |
95035b6f | 115 | static location_t current_function_prototype_locus; |
50a9145c | 116 | |
6fb58bba JM |
117 | /* Whether this prototype was built-in. */ |
118 | ||
119 | static bool current_function_prototype_built_in; | |
120 | ||
121 | /* The argument type information of this prototype. */ | |
122 | ||
123 | static tree current_function_prototype_arg_types; | |
124 | ||
7b112487 JM |
125 | /* The argument information structure for the function currently being |
126 | defined. */ | |
127 | ||
f8893e47 | 128 | static struct c_arg_info *current_function_arg_info; |
7b112487 | 129 | |
bc4b653b JM |
130 | /* The obstack on which parser and related data structures, which are |
131 | not live beyond their top-level declaration or definition, are | |
132 | allocated. */ | |
133 | struct obstack parser_obstack; | |
134 | ||
8f17b5c5 MM |
135 | /* The current statement tree. */ |
136 | ||
e2500fed | 137 | static GTY(()) struct stmt_tree_s c_stmt_tree; |
8f17b5c5 | 138 | |
6614fd40 | 139 | /* State saving variables. */ |
506e2710 RH |
140 | tree c_break_label; |
141 | tree c_cont_label; | |
e13e48e7 | 142 | |
f75fbaf7 ZW |
143 | /* A list of decls to be made automatically visible in each file scope. */ |
144 | static GTY(()) tree visible_builtins; | |
145 | ||
51e29401 RS |
146 | /* Set to 0 at beginning of a function definition, set to 1 if |
147 | a return statement that specifies a return value is seen. */ | |
148 | ||
149 | int current_function_returns_value; | |
150 | ||
151 | /* Set to 0 at beginning of a function definition, set to 1 if | |
152 | a return statement with no argument is seen. */ | |
153 | ||
154 | int current_function_returns_null; | |
155 | ||
5ce89b2e JM |
156 | /* Set to 0 at beginning of a function definition, set to 1 if |
157 | a call to a noreturn function is seen. */ | |
158 | ||
159 | int current_function_returns_abnormally; | |
160 | ||
51e29401 RS |
161 | /* Set to nonzero by `grokdeclarator' for a function |
162 | whose return type is defaulted, if warnings for this are desired. */ | |
163 | ||
164 | static int warn_about_return_type; | |
165 | ||
73aea290 JM |
166 | /* Nonzero when the current toplevel function contains a declaration |
167 | of a nested function which is never defined. */ | |
168 | ||
169 | static bool undef_nested_function; | |
170 | ||
412cd719 TG |
171 | /* Mode used to build pointers (VOIDmode means ptr_mode). */ |
172 | ||
ef4bddc2 | 173 | machine_mode c_default_pointer_mode = VOIDmode; |
412cd719 | 174 | |
acf0174b JJ |
175 | /* If non-zero, implicit "omp declare target" attribute is added into the |
176 | attribute lists. */ | |
177 | int current_omp_declare_target_attribute; | |
51e29401 | 178 | \f |
f75fbaf7 ZW |
179 | /* Each c_binding structure describes one binding of an identifier to |
180 | a decl. All the decls in a scope - irrespective of namespace - are | |
181 | chained together by the ->prev field, which (as the name implies) | |
182 | runs in reverse order. All the decls in a given namespace bound to | |
183 | a given identifier are chained by the ->shadowed field, which runs | |
9aaabf8a | 184 | from inner to outer scopes. |
f75fbaf7 ZW |
185 | |
186 | The ->decl field usually points to a DECL node, but there are two | |
187 | exceptions. In the namespace of type tags, the bound entity is a | |
188 | RECORD_TYPE, UNION_TYPE, or ENUMERAL_TYPE node. If an undeclared | |
189 | identifier is encountered, it is bound to error_mark_node to | |
190 | suppress further errors about that identifier in the current | |
9aaabf8a ZW |
191 | function. |
192 | ||
e1b7793c | 193 | The ->u.type field stores the type of the declaration in this scope; |
0b410f0b JM |
194 | if NULL, the type is the type of the ->decl field. This is only of |
195 | relevance for objects with external or internal linkage which may | |
196 | be redeclared in inner scopes, forming composite types that only | |
197 | persist for the duration of those scopes. In the external scope, | |
198 | this stores the composite of all the types declared for this | |
199 | object, visible or not. The ->inner_comp field (used only at file | |
200 | scope) stores whether an incomplete array type at file scope was | |
201 | completed at an inner scope to an array size other than 1. | |
202 | ||
e1b7793c ILT |
203 | The ->u.label field is used for labels. It points to a structure |
204 | which stores additional information used for warnings. | |
205 | ||
9aaabf8a ZW |
206 | The depth field is copied from the scope structure that holds this |
207 | decl. It is used to preserve the proper ordering of the ->shadowed | |
208 | field (see bind()) and also for a handful of special-case checks. | |
209 | Finally, the invisible bit is true for a decl which should be | |
210 | ignored for purposes of normal name lookup, and the nested bit is | |
211 | true for a decl that's been bound a second time in an inner scope; | |
212 | in all such cases, the binding in the outer scope will have its | |
213 | invisible bit true. */ | |
f75fbaf7 | 214 | |
d1b38208 | 215 | struct GTY((chain_next ("%h.prev"))) c_binding { |
e1b7793c ILT |
216 | union GTY(()) { /* first so GTY desc can use decl */ |
217 | tree GTY((tag ("0"))) type; /* the type in this scope */ | |
218 | struct c_label_vars * GTY((tag ("1"))) label; /* for warnings */ | |
219 | } GTY((desc ("TREE_CODE (%0.decl) == LABEL_DECL"))) u; | |
f75fbaf7 ZW |
220 | tree decl; /* the decl bound */ |
221 | tree id; /* the identifier it's bound to */ | |
222 | struct c_binding *prev; /* the previous decl in this scope */ | |
223 | struct c_binding *shadowed; /* the innermost decl shadowed by this one */ | |
9aaabf8a ZW |
224 | unsigned int depth : 28; /* depth of this scope */ |
225 | BOOL_BITFIELD invisible : 1; /* normal lookup should ignore this binding */ | |
226 | BOOL_BITFIELD nested : 1; /* do not set DECL_CONTEXT when popping */ | |
0b410f0b | 227 | BOOL_BITFIELD inner_comp : 1; /* incomplete array completed in inner scope */ |
dc491a25 | 228 | BOOL_BITFIELD in_struct : 1; /* currently defined as struct field */ |
b3f27c15 | 229 | location_t locus; /* location for nested bindings */ |
f75fbaf7 | 230 | }; |
9aaabf8a ZW |
231 | #define B_IN_SCOPE(b1, b2) ((b1)->depth == (b2)->depth) |
232 | #define B_IN_CURRENT_SCOPE(b) ((b)->depth == current_scope->depth) | |
233 | #define B_IN_FILE_SCOPE(b) ((b)->depth == 1 /*file_scope->depth*/) | |
234 | #define B_IN_EXTERNAL_SCOPE(b) ((b)->depth == 0 /*external_scope->depth*/) | |
f75fbaf7 | 235 | |
18d5f982 ZW |
236 | /* Each C symbol points to three linked lists of c_binding structures. |
237 | These describe the values of the identifier in the three different | |
238 | namespaces defined by the language. */ | |
239 | ||
d1b38208 | 240 | struct GTY(()) lang_identifier { |
18d5f982 ZW |
241 | struct c_common_identifier common_id; |
242 | struct c_binding *symbol_binding; /* vars, funcs, constants, typedefs */ | |
243 | struct c_binding *tag_binding; /* struct/union/enum tags */ | |
244 | struct c_binding *label_binding; /* labels */ | |
245 | }; | |
246 | ||
247 | /* Validate c-lang.c's assumptions. */ | |
248 | extern char C_SIZEOF_STRUCT_LANG_IDENTIFIER_isnt_accurate | |
249 | [(sizeof(struct lang_identifier) == C_SIZEOF_STRUCT_LANG_IDENTIFIER) ? 1 : -1]; | |
250 | ||
ddc8de03 PM |
251 | /* The binding oracle; see c-tree.h. */ |
252 | void (*c_binding_oracle) (enum c_oracle_request, tree identifier); | |
253 | ||
254 | /* This flag is set on an identifier if we have previously asked the | |
255 | binding oracle for this identifier's symbol binding. */ | |
256 | #define I_SYMBOL_CHECKED(node) \ | |
257 | (TREE_LANG_FLAG_4 (IDENTIFIER_NODE_CHECK (node))) | |
258 | ||
259 | static inline struct c_binding* * | |
260 | i_symbol_binding (tree node) | |
261 | { | |
262 | struct lang_identifier *lid | |
263 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
264 | ||
265 | if (lid->symbol_binding == NULL | |
266 | && c_binding_oracle != NULL | |
267 | && !I_SYMBOL_CHECKED (node)) | |
268 | { | |
269 | /* Set the "checked" flag first, to avoid infinite recursion | |
270 | when the binding oracle calls back into gcc. */ | |
271 | I_SYMBOL_CHECKED (node) = 1; | |
272 | c_binding_oracle (C_ORACLE_SYMBOL, node); | |
273 | } | |
274 | ||
275 | return &lid->symbol_binding; | |
276 | } | |
277 | ||
278 | #define I_SYMBOL_BINDING(node) (*i_symbol_binding (node)) | |
279 | ||
280 | #define I_SYMBOL_DECL(node) \ | |
281 | (I_SYMBOL_BINDING(node) ? I_SYMBOL_BINDING(node)->decl : 0) | |
282 | ||
283 | /* This flag is set on an identifier if we have previously asked the | |
284 | binding oracle for this identifier's tag binding. */ | |
285 | #define I_TAG_CHECKED(node) \ | |
286 | (TREE_LANG_FLAG_5 (IDENTIFIER_NODE_CHECK (node))) | |
287 | ||
288 | static inline struct c_binding ** | |
289 | i_tag_binding (tree node) | |
290 | { | |
291 | struct lang_identifier *lid | |
292 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
293 | ||
294 | if (lid->tag_binding == NULL | |
295 | && c_binding_oracle != NULL | |
296 | && !I_TAG_CHECKED (node)) | |
297 | { | |
298 | /* Set the "checked" flag first, to avoid infinite recursion | |
299 | when the binding oracle calls back into gcc. */ | |
300 | I_TAG_CHECKED (node) = 1; | |
301 | c_binding_oracle (C_ORACLE_TAG, node); | |
302 | } | |
303 | ||
304 | return &lid->tag_binding; | |
305 | } | |
306 | ||
307 | #define I_TAG_BINDING(node) (*i_tag_binding (node)) | |
308 | ||
309 | #define I_TAG_DECL(node) \ | |
310 | (I_TAG_BINDING(node) ? I_TAG_BINDING(node)->decl : 0) | |
311 | ||
312 | /* This flag is set on an identifier if we have previously asked the | |
313 | binding oracle for this identifier's label binding. */ | |
314 | #define I_LABEL_CHECKED(node) \ | |
315 | (TREE_LANG_FLAG_6 (IDENTIFIER_NODE_CHECK (node))) | |
316 | ||
317 | static inline struct c_binding ** | |
318 | i_label_binding (tree node) | |
319 | { | |
320 | struct lang_identifier *lid | |
321 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
322 | ||
323 | if (lid->label_binding == NULL | |
324 | && c_binding_oracle != NULL | |
325 | && !I_LABEL_CHECKED (node)) | |
326 | { | |
327 | /* Set the "checked" flag first, to avoid infinite recursion | |
328 | when the binding oracle calls back into gcc. */ | |
329 | I_LABEL_CHECKED (node) = 1; | |
330 | c_binding_oracle (C_ORACLE_LABEL, node); | |
331 | } | |
332 | ||
333 | return &lid->label_binding; | |
334 | } | |
335 | ||
336 | #define I_LABEL_BINDING(node) (*i_label_binding (node)) | |
337 | ||
338 | #define I_LABEL_DECL(node) \ | |
339 | (I_LABEL_BINDING(node) ? I_LABEL_BINDING(node)->decl : 0) | |
340 | ||
18d5f982 ZW |
341 | /* The resulting tree type. */ |
342 | ||
d1b38208 | 343 | union GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"), |
56300785 | 344 | chain_next ("(union lang_tree_node *) c_tree_chain_next (&%h.generic)"))) lang_tree_node |
d1b38208 | 345 | { |
18d5f982 ZW |
346 | union tree_node GTY ((tag ("0"), |
347 | desc ("tree_node_structure (&%h)"))) | |
348 | generic; | |
349 | struct lang_identifier GTY ((tag ("1"))) identifier; | |
350 | }; | |
351 | ||
e1b7793c ILT |
352 | /* Track bindings and other things that matter for goto warnings. For |
353 | efficiency, we do not gather all the decls at the point of | |
354 | definition. Instead, we point into the bindings structure. As | |
355 | scopes are popped, we update these structures and gather the decls | |
356 | that matter at that time. */ | |
357 | ||
358 | struct GTY(()) c_spot_bindings { | |
359 | /* The currently open scope which holds bindings defined when the | |
360 | label was defined or the goto statement was found. */ | |
361 | struct c_scope *scope; | |
362 | /* The bindings in the scope field which were defined at the point | |
363 | of the label or goto. This lets us look at older or newer | |
364 | bindings in the scope, as appropriate. */ | |
365 | struct c_binding *bindings_in_scope; | |
366 | /* The number of statement expressions that have started since this | |
367 | label or goto statement was defined. This is zero if we are at | |
368 | the same statement expression level. It is positive if we are in | |
369 | a statement expression started since this spot. It is negative | |
370 | if this spot was in a statement expression and we have left | |
371 | it. */ | |
372 | int stmt_exprs; | |
373 | /* Whether we started in a statement expression but are no longer in | |
374 | it. This is set to true if stmt_exprs ever goes negative. */ | |
375 | bool left_stmt_expr; | |
376 | }; | |
377 | ||
378 | /* This structure is used to keep track of bindings seen when a goto | |
379 | statement is defined. This is only used if we see the goto | |
380 | statement before we see the label. */ | |
381 | ||
382 | struct GTY(()) c_goto_bindings { | |
383 | /* The location of the goto statement. */ | |
384 | location_t loc; | |
385 | /* The bindings of the goto statement. */ | |
386 | struct c_spot_bindings goto_bindings; | |
387 | }; | |
388 | ||
389 | typedef struct c_goto_bindings *c_goto_bindings_p; | |
e1b7793c ILT |
390 | |
391 | /* The additional information we keep track of for a label binding. | |
392 | These fields are updated as scopes are popped. */ | |
393 | ||
394 | struct GTY(()) c_label_vars { | |
395 | /* The shadowed c_label_vars, when one label shadows another (which | |
396 | can only happen using a __label__ declaration). */ | |
397 | struct c_label_vars *shadowed; | |
398 | /* The bindings when the label was defined. */ | |
399 | struct c_spot_bindings label_bindings; | |
400 | /* A list of decls that we care about: decls about which we should | |
401 | warn if a goto branches to this label from later in the function. | |
402 | Decls are added to this list as scopes are popped. We only add | |
403 | the decls that matter. */ | |
9771b263 | 404 | vec<tree, va_gc> *decls_in_scope; |
e1b7793c ILT |
405 | /* A list of goto statements to this label. This is only used for |
406 | goto statements seen before the label was defined, so that we can | |
407 | issue appropriate warnings for them. */ | |
9771b263 | 408 | vec<c_goto_bindings_p, va_gc> *gotos; |
e1b7793c ILT |
409 | }; |
410 | ||
f75fbaf7 ZW |
411 | /* Each c_scope structure describes the complete contents of one |
412 | scope. Four scopes are distinguished specially: the innermost or | |
413 | current scope, the innermost function scope, the file scope (always | |
414 | the second to outermost) and the outermost or external scope. | |
f91f41b2 ZW |
415 | |
416 | Most declarations are recorded in the current scope. | |
417 | ||
418 | All normal label declarations are recorded in the innermost | |
419 | function scope, as are bindings of undeclared identifiers to | |
420 | error_mark_node. (GCC permits nested functions as an extension, | |
421 | hence the 'innermost' qualifier.) Explicitly declared labels | |
422 | (using the __label__ extension) appear in the current scope. | |
423 | ||
f75fbaf7 | 424 | Being in the file scope (current_scope == file_scope) causes |
f91f41b2 ZW |
425 | special behavior in several places below. Also, under some |
426 | conditions the Objective-C front end records declarations in the | |
f75fbaf7 ZW |
427 | file scope even though that isn't the current scope. |
428 | ||
429 | All declarations with external linkage are recorded in the external | |
430 | scope, even if they aren't visible there; this models the fact that | |
431 | such declarations are visible to the entire program, and (with a | |
432 | bit of cleverness, see pushdecl) allows diagnosis of some violations | |
433 | of C99 6.2.2p7 and 6.2.7p2: | |
434 | ||
435 | If, within the same translation unit, the same identifier appears | |
436 | with both internal and external linkage, the behavior is | |
437 | undefined. | |
f91f41b2 | 438 | |
f75fbaf7 ZW |
439 | All declarations that refer to the same object or function shall |
440 | have compatible type; otherwise, the behavior is undefined. | |
441 | ||
442 | Initially only the built-in declarations, which describe compiler | |
443 | intrinsic functions plus a subset of the standard library, are in | |
444 | this scope. | |
445 | ||
446 | The order of the blocks list matters, and it is frequently appended | |
447 | to. To avoid having to walk all the way to the end of the list on | |
448 | each insertion, or reverse the list later, we maintain a pointer to | |
449 | the last list entry. (FIXME: It should be feasible to use a reversed | |
450 | list here.) | |
451 | ||
452 | The bindings list is strictly in reverse order of declarations; | |
453 | pop_scope relies on this. */ | |
f91f41b2 | 454 | |
51e29401 | 455 | |
d1b38208 | 456 | struct GTY((chain_next ("%h.outer"))) c_scope { |
14077d68 ZW |
457 | /* The scope containing this one. */ |
458 | struct c_scope *outer; | |
459 | ||
460 | /* The next outermost function scope. */ | |
461 | struct c_scope *outer_function; | |
462 | ||
f75fbaf7 ZW |
463 | /* All bindings in this scope. */ |
464 | struct c_binding *bindings; | |
14077d68 ZW |
465 | |
466 | /* For each scope (except the global one), a chain of BLOCK nodes | |
467 | for all the scopes that were entered and exited one level down. */ | |
468 | tree blocks; | |
f91f41b2 | 469 | tree blocks_last; |
14077d68 | 470 | |
f75fbaf7 ZW |
471 | /* The depth of this scope. Used to keep the ->shadowed chain of |
472 | bindings sorted innermost to outermost. */ | |
473 | unsigned int depth : 28; | |
474 | ||
14077d68 ZW |
475 | /* True if we are currently filling this scope with parameter |
476 | declarations. */ | |
1c62e7b2 | 477 | BOOL_BITFIELD parm_flag : 1; |
14077d68 | 478 | |
52ffd86e MS |
479 | /* True if we saw [*] in this scope. Used to give an error messages |
480 | if these appears in a function definition. */ | |
481 | BOOL_BITFIELD had_vla_unspec : 1; | |
482 | ||
55d54003 ZW |
483 | /* True if we already complained about forward parameter decls |
484 | in this scope. This prevents double warnings on | |
485 | foo (int a; int b; ...) */ | |
1c62e7b2 | 486 | BOOL_BITFIELD warned_forward_parm_decls : 1; |
55d54003 | 487 | |
14077d68 ZW |
488 | /* True if this is the outermost block scope of a function body. |
489 | This scope contains the parameters, the local variables declared | |
490 | in the outermost block, and all the labels (except those in | |
491 | nested functions, or declared at block scope with __label__). */ | |
1c62e7b2 | 492 | BOOL_BITFIELD function_body : 1; |
14077d68 ZW |
493 | |
494 | /* True means make a BLOCK for this scope no matter what. */ | |
1c62e7b2 | 495 | BOOL_BITFIELD keep : 1; |
6ec637a4 JJ |
496 | |
497 | /* True means that an unsuffixed float constant is _Decimal64. */ | |
498 | BOOL_BITFIELD float_const_decimal64 : 1; | |
e1b7793c ILT |
499 | |
500 | /* True if this scope has any label bindings. This is used to speed | |
501 | up searching for labels when popping scopes, particularly since | |
502 | labels are normally only found at function scope. */ | |
503 | BOOL_BITFIELD has_label_bindings : 1; | |
744f0946 ILT |
504 | |
505 | /* True if we should issue a warning if a goto statement crosses any | |
506 | of the bindings. We still need to check the list of bindings to | |
507 | find the specific ones we need to warn about. This is true if | |
508 | decl_jump_unsafe would return true for any of the bindings. This | |
509 | is used to avoid looping over all the bindings unnecessarily. */ | |
510 | BOOL_BITFIELD has_jump_unsafe_decl : 1; | |
14077d68 | 511 | }; |
51e29401 | 512 | |
f8521984 | 513 | /* The scope currently in effect. */ |
6645c3fa | 514 | |
f8521984 | 515 | static GTY(()) struct c_scope *current_scope; |
51e29401 | 516 | |
14e33ee8 ZW |
517 | /* The innermost function scope. Ordinary (not explicitly declared) |
518 | labels, bindings to error_mark_node, and the lazily-created | |
519 | bindings of __func__ and its friends get this scope. */ | |
14077d68 | 520 | |
f8521984 | 521 | static GTY(()) struct c_scope *current_function_scope; |
14e33ee8 | 522 | |
f75fbaf7 ZW |
523 | /* The C file scope. This is reset for each input translation unit. */ |
524 | ||
525 | static GTY(()) struct c_scope *file_scope; | |
526 | ||
527 | /* The outermost scope. This is used for all declarations with | |
528 | external linkage, and only these, hence the name. */ | |
529 | ||
530 | static GTY(()) struct c_scope *external_scope; | |
531 | ||
532 | /* A chain of c_scope structures awaiting reuse. */ | |
533 | ||
1431042e | 534 | static GTY((deletable)) struct c_scope *scope_freelist; |
f75fbaf7 ZW |
535 | |
536 | /* A chain of c_binding structures awaiting reuse. */ | |
51e29401 | 537 | |
1431042e | 538 | static GTY((deletable)) struct c_binding *binding_freelist; |
51e29401 | 539 | |
3d93cdfa | 540 | /* Append VAR to LIST in scope SCOPE. */ |
f91f41b2 ZW |
541 | #define SCOPE_LIST_APPEND(scope, list, decl) do { \ |
542 | struct c_scope *s_ = (scope); \ | |
543 | tree d_ = (decl); \ | |
544 | if (s_->list##_last) \ | |
87caf699 | 545 | BLOCK_CHAIN (s_->list##_last) = d_; \ |
f91f41b2 ZW |
546 | else \ |
547 | s_->list = d_; \ | |
548 | s_->list##_last = d_; \ | |
549 | } while (0) | |
550 | ||
551 | /* Concatenate FROM in scope FSCOPE onto TO in scope TSCOPE. */ | |
552 | #define SCOPE_LIST_CONCAT(tscope, to, fscope, from) do { \ | |
553 | struct c_scope *t_ = (tscope); \ | |
554 | struct c_scope *f_ = (fscope); \ | |
555 | if (t_->to##_last) \ | |
87caf699 | 556 | BLOCK_CHAIN (t_->to##_last) = f_->from; \ |
f91f41b2 ZW |
557 | else \ |
558 | t_->to = f_->from; \ | |
559 | t_->to##_last = f_->from##_last; \ | |
560 | } while (0) | |
561 | ||
991d6621 JM |
562 | /* A c_inline_static structure stores details of a static identifier |
563 | referenced in a definition of a function that may be an inline | |
564 | definition if no subsequent declaration of that function uses | |
565 | "extern" or does not use "inline". */ | |
566 | ||
567 | struct GTY((chain_next ("%h.next"))) c_inline_static { | |
568 | /* The location for a diagnostic. */ | |
569 | location_t location; | |
570 | ||
571 | /* The function that may be an inline definition. */ | |
572 | tree function; | |
573 | ||
574 | /* The object or function referenced. */ | |
575 | tree static_decl; | |
576 | ||
577 | /* What sort of reference this is. */ | |
578 | enum c_inline_static_type type; | |
579 | ||
580 | /* The next such structure or NULL. */ | |
581 | struct c_inline_static *next; | |
582 | }; | |
583 | ||
584 | /* List of static identifiers used or referenced in functions that may | |
585 | be inline definitions. */ | |
586 | static GTY(()) struct c_inline_static *c_inline_statics; | |
587 | ||
f8521984 | 588 | /* True means unconditionally make a BLOCK for the next scope pushed. */ |
51e29401 | 589 | |
14e33ee8 | 590 | static bool keep_next_level_flag; |
51e29401 | 591 | |
f75fbaf7 | 592 | /* True means the next call to push_scope will be the outermost scope |
a8ccdffe ZW |
593 | of a function body, so do not push a new scope, merely cease |
594 | expecting parameter decls. */ | |
6645c3fa | 595 | |
a8ccdffe | 596 | static bool next_is_function_body; |
51e29401 | 597 | |
9771b263 | 598 | /* A vector of pointers to c_binding structures. */ |
dc491a25 ILT |
599 | |
600 | typedef struct c_binding *c_binding_ptr; | |
dc491a25 ILT |
601 | |
602 | /* Information that we keep for a struct or union while it is being | |
603 | parsed. */ | |
604 | ||
605 | struct c_struct_parse_info | |
606 | { | |
607 | /* If warn_cxx_compat, a list of types defined within this | |
608 | struct. */ | |
9771b263 | 609 | vec<tree> struct_types; |
dc491a25 ILT |
610 | /* If warn_cxx_compat, a list of field names which have bindings, |
611 | and which are defined in this struct, but which are not defined | |
612 | in any enclosing struct. This is used to clear the in_struct | |
613 | field of the c_bindings structure. */ | |
9771b263 | 614 | vec<c_binding_ptr> fields; |
dc491a25 ILT |
615 | /* If warn_cxx_compat, a list of typedef names used when defining |
616 | fields in this struct. */ | |
9771b263 | 617 | vec<tree> typedefs_seen; |
dc491a25 ILT |
618 | }; |
619 | ||
620 | /* Information for the struct or union currently being parsed, or | |
621 | NULL if not parsing a struct or union. */ | |
622 | static struct c_struct_parse_info *struct_parse_info; | |
623 | ||
51e29401 | 624 | /* Forward declarations. */ |
f75fbaf7 | 625 | static tree lookup_name_in_scope (tree, struct c_scope *); |
c2255bc4 | 626 | static tree c_make_fname_decl (location_t, tree, int); |
deb176fa JM |
627 | static tree grokdeclarator (const struct c_declarator *, |
628 | struct c_declspecs *, | |
928c19bb JM |
629 | enum decl_context, bool, tree *, tree *, tree *, |
630 | bool *, enum deprecated_states); | |
f8893e47 | 631 | static tree grokparms (struct c_arg_info *, bool); |
35b1a6fa | 632 | static void layout_array_type (tree); |
35aff4fb MP |
633 | static void warn_defaults_to (location_t, int, const char *, ...) |
634 | ATTRIBUTE_GCC_DIAG(3,4); | |
51e29401 | 635 | \f |
ed3d0b14 ILT |
636 | /* T is a statement. Add it to the statement-tree. This is the |
637 | C/ObjC version--C++ has a slightly different version of this | |
638 | function. */ | |
639 | ||
640 | tree | |
641 | add_stmt (tree t) | |
642 | { | |
643 | enum tree_code code = TREE_CODE (t); | |
644 | ||
07beea0d | 645 | if (CAN_HAVE_LOCATION_P (t) && code != LABEL_EXPR) |
ed3d0b14 ILT |
646 | { |
647 | if (!EXPR_HAS_LOCATION (t)) | |
648 | SET_EXPR_LOCATION (t, input_location); | |
649 | } | |
650 | ||
651 | if (code == LABEL_EXPR || code == CASE_LABEL_EXPR) | |
652 | STATEMENT_LIST_HAS_LABEL (cur_stmt_list) = 1; | |
653 | ||
654 | /* Add T to the statement-tree. Non-side-effect statements need to be | |
655 | recorded during statement expressions. */ | |
38e01f9e NF |
656 | if (!building_stmt_list_p ()) |
657 | push_stmt_list (); | |
ed3d0b14 ILT |
658 | append_to_statement_list_force (t, &cur_stmt_list); |
659 | ||
660 | return t; | |
661 | } | |
412cd719 TG |
662 | \f |
663 | /* Build a pointer type using the default pointer mode. */ | |
664 | ||
665 | static tree | |
666 | c_build_pointer_type (tree to_type) | |
667 | { | |
668 | addr_space_t as = to_type == error_mark_node? ADDR_SPACE_GENERIC | |
669 | : TYPE_ADDR_SPACE (to_type); | |
ef4bddc2 | 670 | machine_mode pointer_mode; |
412cd719 TG |
671 | |
672 | if (as != ADDR_SPACE_GENERIC || c_default_pointer_mode == VOIDmode) | |
673 | pointer_mode = targetm.addr_space.pointer_mode (as); | |
674 | else | |
675 | pointer_mode = c_default_pointer_mode; | |
676 | return build_pointer_type_for_mode (to_type, pointer_mode, false); | |
677 | } | |
678 | ||
ed3d0b14 | 679 | \f |
744f0946 ILT |
680 | /* Return true if we will want to say something if a goto statement |
681 | crosses DECL. */ | |
682 | ||
683 | static bool | |
684 | decl_jump_unsafe (tree decl) | |
685 | { | |
b504a918 | 686 | if (error_operand_p (decl)) |
744f0946 ILT |
687 | return false; |
688 | ||
689 | /* Always warn about crossing variably modified types. */ | |
690 | if ((TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == TYPE_DECL) | |
691 | && variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) | |
692 | return true; | |
693 | ||
694 | /* Otherwise, only warn if -Wgoto-misses-init and this is an | |
695 | initialized automatic decl. */ | |
696 | if (warn_jump_misses_init | |
697 | && TREE_CODE (decl) == VAR_DECL | |
698 | && !TREE_STATIC (decl) | |
699 | && DECL_INITIAL (decl) != NULL_TREE) | |
700 | return true; | |
701 | ||
702 | return false; | |
703 | } | |
704 | \f | |
e23bd218 | 705 | |
51e29401 | 706 | void |
35b1a6fa | 707 | c_print_identifier (FILE *file, tree node, int indent) |
51e29401 | 708 | { |
ddc8de03 PM |
709 | void (*save) (enum c_oracle_request, tree identifier); |
710 | ||
711 | /* Temporarily hide any binding oracle. Without this, calls to | |
712 | debug_tree from the debugger will end up calling into the oracle, | |
713 | making for a confusing debug session. As the oracle isn't needed | |
714 | here for normal operation, it's simplest to suppress it. */ | |
715 | save = c_binding_oracle; | |
716 | c_binding_oracle = NULL; | |
717 | ||
f75fbaf7 ZW |
718 | print_node (file, "symbol", I_SYMBOL_DECL (node), indent + 4); |
719 | print_node (file, "tag", I_TAG_DECL (node), indent + 4); | |
720 | print_node (file, "label", I_LABEL_DECL (node), indent + 4); | |
eea1139b | 721 | if (C_IS_RESERVED_WORD (node) && C_RID_CODE (node) != RID_CXX_COMPAT_WARN) |
0e5921e8 ZW |
722 | { |
723 | tree rid = ridpointers[C_RID_CODE (node)]; | |
724 | indent_to (file, indent + 4); | |
edb89024 | 725 | fprintf (file, "rid " HOST_PTR_PRINTF " \"%s\"", |
75b6f3fd | 726 | (void *) rid, IDENTIFIER_POINTER (rid)); |
0e5921e8 | 727 | } |
ddc8de03 PM |
728 | |
729 | c_binding_oracle = save; | |
51e29401 | 730 | } |
f75fbaf7 ZW |
731 | |
732 | /* Establish a binding between NAME, an IDENTIFIER_NODE, and DECL, | |
733 | which may be any of several kinds of DECL or TYPE or error_mark_node, | |
734 | in the scope SCOPE. */ | |
735 | static void | |
b3f27c15 JJ |
736 | bind (tree name, tree decl, struct c_scope *scope, bool invisible, |
737 | bool nested, location_t locus) | |
f75fbaf7 ZW |
738 | { |
739 | struct c_binding *b, **here; | |
740 | ||
741 | if (binding_freelist) | |
742 | { | |
743 | b = binding_freelist; | |
744 | binding_freelist = b->prev; | |
745 | } | |
746 | else | |
766090c2 | 747 | b = ggc_alloc<c_binding> (); |
f75fbaf7 ZW |
748 | |
749 | b->shadowed = 0; | |
750 | b->decl = decl; | |
751 | b->id = name; | |
9aaabf8a ZW |
752 | b->depth = scope->depth; |
753 | b->invisible = invisible; | |
754 | b->nested = nested; | |
0b410f0b | 755 | b->inner_comp = 0; |
dc491a25 | 756 | b->in_struct = 0; |
b3f27c15 | 757 | b->locus = locus; |
0b410f0b | 758 | |
e1b7793c | 759 | b->u.type = NULL; |
f75fbaf7 ZW |
760 | |
761 | b->prev = scope->bindings; | |
762 | scope->bindings = b; | |
763 | ||
744f0946 ILT |
764 | if (decl_jump_unsafe (decl)) |
765 | scope->has_jump_unsafe_decl = 1; | |
766 | ||
f75fbaf7 ZW |
767 | if (!name) |
768 | return; | |
769 | ||
770 | switch (TREE_CODE (decl)) | |
771 | { | |
772 | case LABEL_DECL: here = &I_LABEL_BINDING (name); break; | |
773 | case ENUMERAL_TYPE: | |
774 | case UNION_TYPE: | |
775 | case RECORD_TYPE: here = &I_TAG_BINDING (name); break; | |
776 | case VAR_DECL: | |
777 | case FUNCTION_DECL: | |
778 | case TYPE_DECL: | |
779 | case CONST_DECL: | |
780 | case PARM_DECL: | |
781 | case ERROR_MARK: here = &I_SYMBOL_BINDING (name); break; | |
782 | ||
783 | default: | |
366de0ce | 784 | gcc_unreachable (); |
f75fbaf7 ZW |
785 | } |
786 | ||
787 | /* Locate the appropriate place in the chain of shadowed decls | |
788 | to insert this binding. Normally, scope == current_scope and | |
789 | this does nothing. */ | |
9aaabf8a | 790 | while (*here && (*here)->depth > scope->depth) |
f75fbaf7 ZW |
791 | here = &(*here)->shadowed; |
792 | ||
793 | b->shadowed = *here; | |
794 | *here = b; | |
795 | } | |
796 | ||
797 | /* Clear the binding structure B, stick it on the binding_freelist, | |
798 | and return the former value of b->prev. This is used by pop_scope | |
799 | and get_parm_info to iterate destructively over all the bindings | |
800 | from a given scope. */ | |
801 | static struct c_binding * | |
802 | free_binding_and_advance (struct c_binding *b) | |
803 | { | |
804 | struct c_binding *prev = b->prev; | |
805 | ||
9aaabf8a | 806 | memset (b, 0, sizeof (struct c_binding)); |
f75fbaf7 ZW |
807 | b->prev = binding_freelist; |
808 | binding_freelist = b; | |
809 | ||
810 | return prev; | |
811 | } | |
812 | ||
e1b7793c ILT |
813 | /* Bind a label. Like bind, but skip fields which aren't used for |
814 | labels, and add the LABEL_VARS value. */ | |
815 | static void | |
816 | bind_label (tree name, tree label, struct c_scope *scope, | |
817 | struct c_label_vars *label_vars) | |
818 | { | |
819 | struct c_binding *b; | |
820 | ||
821 | bind (name, label, scope, /*invisible=*/false, /*nested=*/false, | |
822 | UNKNOWN_LOCATION); | |
823 | ||
824 | scope->has_label_bindings = true; | |
825 | ||
826 | b = scope->bindings; | |
827 | gcc_assert (b->decl == label); | |
828 | label_vars->shadowed = b->u.label; | |
829 | b->u.label = label_vars; | |
830 | } | |
51e29401 | 831 | \f |
b4892310 | 832 | /* Hook called at end of compilation to assume 1 elt |
f8521984 | 833 | for a file-scope tentative array defn that wasn't complete before. */ |
6645c3fa | 834 | |
b4892310 | 835 | void |
35b1a6fa | 836 | c_finish_incomplete_decl (tree decl) |
b4892310 | 837 | { |
5cfac96e | 838 | if (TREE_CODE (decl) == VAR_DECL) |
b4892310 RS |
839 | { |
840 | tree type = TREE_TYPE (decl); | |
5cfac96e RK |
841 | if (type != error_mark_node |
842 | && TREE_CODE (type) == ARRAY_TYPE | |
3f75a254 | 843 | && !DECL_EXTERNAL (decl) |
5cfac96e | 844 | && TYPE_DOMAIN (type) == 0) |
b4892310 | 845 | { |
c2255bc4 AH |
846 | warning_at (DECL_SOURCE_LOCATION (decl), |
847 | 0, "array %q+D assumed to have one element", decl); | |
5cfac96e | 848 | |
aab038d5 | 849 | complete_array_type (&TREE_TYPE (decl), NULL_TREE, true); |
b4892310 | 850 | |
156030d3 | 851 | relayout_decl (decl); |
b4892310 RS |
852 | } |
853 | } | |
854 | } | |
855 | \f | |
991d6621 JM |
856 | /* Record that inline function FUNC contains a reference (location |
857 | LOC) to static DECL (file-scope or function-local according to | |
858 | TYPE). */ | |
859 | ||
860 | void | |
861 | record_inline_static (location_t loc, tree func, tree decl, | |
862 | enum c_inline_static_type type) | |
863 | { | |
766090c2 | 864 | c_inline_static *csi = ggc_alloc<c_inline_static> (); |
991d6621 JM |
865 | csi->location = loc; |
866 | csi->function = func; | |
867 | csi->static_decl = decl; | |
868 | csi->type = type; | |
869 | csi->next = c_inline_statics; | |
870 | c_inline_statics = csi; | |
871 | } | |
872 | ||
873 | /* Check for references to static declarations in inline functions at | |
874 | the end of the translation unit and diagnose them if the functions | |
875 | are still inline definitions. */ | |
876 | ||
877 | static void | |
878 | check_inline_statics (void) | |
879 | { | |
880 | struct c_inline_static *csi; | |
881 | for (csi = c_inline_statics; csi; csi = csi->next) | |
882 | { | |
883 | if (DECL_EXTERNAL (csi->function)) | |
884 | switch (csi->type) | |
885 | { | |
886 | case csi_internal: | |
887 | pedwarn (csi->location, 0, | |
888 | "%qD is static but used in inline function %qD " | |
889 | "which is not static", csi->static_decl, csi->function); | |
890 | break; | |
891 | case csi_modifiable: | |
892 | pedwarn (csi->location, 0, | |
893 | "%q+D is static but declared in inline function %qD " | |
894 | "which is not static", csi->static_decl, csi->function); | |
895 | break; | |
896 | default: | |
897 | gcc_unreachable (); | |
898 | } | |
899 | } | |
900 | c_inline_statics = NULL; | |
901 | } | |
902 | \f | |
e1b7793c ILT |
903 | /* Fill in a c_spot_bindings structure. If DEFINING is true, set it |
904 | for the current state, otherwise set it to uninitialized. */ | |
905 | ||
906 | static void | |
907 | set_spot_bindings (struct c_spot_bindings *p, bool defining) | |
908 | { | |
909 | if (defining) | |
910 | { | |
911 | p->scope = current_scope; | |
912 | p->bindings_in_scope = current_scope->bindings; | |
913 | } | |
914 | else | |
915 | { | |
916 | p->scope = NULL; | |
917 | p->bindings_in_scope = NULL; | |
918 | } | |
919 | p->stmt_exprs = 0; | |
920 | p->left_stmt_expr = false; | |
921 | } | |
922 | ||
e1b7793c ILT |
923 | /* Update spot bindings P as we pop out of SCOPE. Return true if we |
924 | should push decls for a label. */ | |
925 | ||
926 | static bool | |
927 | update_spot_bindings (struct c_scope *scope, struct c_spot_bindings *p) | |
928 | { | |
929 | if (p->scope != scope) | |
930 | { | |
931 | /* This label or goto is defined in some other scope, or it is a | |
932 | label which is not yet defined. There is nothing to | |
933 | update. */ | |
934 | return false; | |
935 | } | |
936 | ||
937 | /* Adjust the spot bindings to refer to the bindings already defined | |
938 | in the enclosing scope. */ | |
939 | p->scope = scope->outer; | |
940 | p->bindings_in_scope = p->scope->bindings; | |
941 | ||
942 | return true; | |
943 | } | |
944 | \f | |
264fa2db ZL |
945 | /* The Objective-C front-end often needs to determine the current scope. */ |
946 | ||
947 | void * | |
bc095846 | 948 | objc_get_current_scope (void) |
264fa2db ZL |
949 | { |
950 | return current_scope; | |
951 | } | |
952 | ||
953 | /* The following function is used only by Objective-C. It needs to live here | |
954 | because it accesses the innards of c_scope. */ | |
955 | ||
956 | void | |
957 | objc_mark_locals_volatile (void *enclosing_blk) | |
958 | { | |
959 | struct c_scope *scope; | |
f75fbaf7 | 960 | struct c_binding *b; |
e13e48e7 EC |
961 | |
962 | for (scope = current_scope; | |
264fa2db ZL |
963 | scope && scope != enclosing_blk; |
964 | scope = scope->outer) | |
965 | { | |
f75fbaf7 | 966 | for (b = scope->bindings; b; b = b->prev) |
58393038 | 967 | objc_volatilize_decl (b->decl); |
f75fbaf7 | 968 | |
264fa2db ZL |
969 | /* Do not climb up past the current function. */ |
970 | if (scope->function_body) | |
971 | break; | |
e13e48e7 EC |
972 | } |
973 | } | |
974 | ||
c99c0026 | 975 | /* Return true if we are in the global binding level. */ |
51e29401 | 976 | |
c99c0026 | 977 | bool |
35b1a6fa | 978 | global_bindings_p (void) |
51e29401 | 979 | { |
96703596 | 980 | return current_scope == file_scope; |
51e29401 RS |
981 | } |
982 | ||
983 | void | |
35b1a6fa | 984 | keep_next_level (void) |
51e29401 | 985 | { |
14e33ee8 | 986 | keep_next_level_flag = true; |
51e29401 RS |
987 | } |
988 | ||
6ec637a4 JJ |
989 | /* Set the flag for the FLOAT_CONST_DECIMAL64 pragma being ON. */ |
990 | ||
991 | void | |
992 | set_float_const_decimal64 (void) | |
993 | { | |
994 | current_scope->float_const_decimal64 = true; | |
995 | } | |
996 | ||
997 | /* Clear the flag for the FLOAT_CONST_DECIMAL64 pragma. */ | |
998 | ||
999 | void | |
1000 | clear_float_const_decimal64 (void) | |
1001 | { | |
1002 | current_scope->float_const_decimal64 = false; | |
1003 | } | |
1004 | ||
1005 | /* Return nonzero if an unsuffixed float constant is _Decimal64. */ | |
1006 | ||
1007 | bool | |
1008 | float_const_decimal64_p (void) | |
1009 | { | |
1010 | return current_scope->float_const_decimal64; | |
1011 | } | |
1012 | ||
f8521984 | 1013 | /* Identify this scope as currently being filled with parameters. */ |
51e29401 RS |
1014 | |
1015 | void | |
eb1dfbb2 | 1016 | declare_parm_level (void) |
51e29401 | 1017 | { |
f8521984 | 1018 | current_scope->parm_flag = true; |
51e29401 RS |
1019 | } |
1020 | ||
51e29401 | 1021 | void |
f75fbaf7 | 1022 | push_scope (void) |
51e29401 | 1023 | { |
a8ccdffe | 1024 | if (next_is_function_body) |
51e29401 | 1025 | { |
339a28b9 ZW |
1026 | /* This is the transition from the parameters to the top level |
1027 | of the function body. These are the same scope | |
f8521984 | 1028 | (C99 6.2.1p4,6) so we do not push another scope structure. |
a8ccdffe ZW |
1029 | next_is_function_body is set only by store_parm_decls, which |
1030 | in turn is called when and only when we are about to | |
1031 | encounter the opening curly brace for the function body. | |
339a28b9 | 1032 | |
a8ccdffe ZW |
1033 | The outermost block of a function always gets a BLOCK node, |
1034 | because the debugging output routines expect that each | |
59e4e217 | 1035 | function has at least one BLOCK. */ |
f8521984 ZW |
1036 | current_scope->parm_flag = false; |
1037 | current_scope->function_body = true; | |
a8ccdffe | 1038 | current_scope->keep = true; |
f8521984 ZW |
1039 | current_scope->outer_function = current_function_scope; |
1040 | current_function_scope = current_scope; | |
14e33ee8 ZW |
1041 | |
1042 | keep_next_level_flag = false; | |
a8ccdffe | 1043 | next_is_function_body = false; |
6ec637a4 JJ |
1044 | |
1045 | /* The FLOAT_CONST_DECIMAL64 pragma applies to nested scopes. */ | |
1046 | if (current_scope->outer) | |
1047 | current_scope->float_const_decimal64 | |
1048 | = current_scope->outer->float_const_decimal64; | |
1049 | else | |
1050 | current_scope->float_const_decimal64 = false; | |
51e29401 | 1051 | } |
339a28b9 ZW |
1052 | else |
1053 | { | |
f75fbaf7 ZW |
1054 | struct c_scope *scope; |
1055 | if (scope_freelist) | |
1056 | { | |
1057 | scope = scope_freelist; | |
1058 | scope_freelist = scope->outer; | |
1059 | } | |
1060 | else | |
766090c2 | 1061 | scope = ggc_cleared_alloc<c_scope> (); |
51e29401 | 1062 | |
6ec637a4 JJ |
1063 | /* The FLOAT_CONST_DECIMAL64 pragma applies to nested scopes. */ |
1064 | if (current_scope) | |
1065 | scope->float_const_decimal64 = current_scope->float_const_decimal64; | |
1066 | else | |
1067 | scope->float_const_decimal64 = false; | |
1068 | ||
f8521984 ZW |
1069 | scope->keep = keep_next_level_flag; |
1070 | scope->outer = current_scope; | |
f75fbaf7 ZW |
1071 | scope->depth = current_scope ? (current_scope->depth + 1) : 0; |
1072 | ||
1073 | /* Check for scope depth overflow. Unlikely (2^28 == 268,435,456) but | |
1074 | possible. */ | |
1075 | if (current_scope && scope->depth == 0) | |
1076 | { | |
1077 | scope->depth--; | |
72c4e4db | 1078 | sorry ("GCC supports only %u nested scopes", scope->depth); |
f75fbaf7 | 1079 | } |
118a3a8b | 1080 | |
f8521984 ZW |
1081 | current_scope = scope; |
1082 | keep_next_level_flag = false; | |
339a28b9 | 1083 | } |
0500d6f9 | 1084 | } |
6645c3fa | 1085 | |
e1b7793c ILT |
1086 | /* This is called when we are leaving SCOPE. For each label defined |
1087 | in SCOPE, add any appropriate decls to its decls_in_scope fields. | |
1088 | These are the decls whose initialization will be skipped by a goto | |
1089 | later in the function. */ | |
1090 | ||
1091 | static void | |
1092 | update_label_decls (struct c_scope *scope) | |
1093 | { | |
1094 | struct c_scope *s; | |
1095 | ||
1096 | s = scope; | |
1097 | while (s != NULL) | |
1098 | { | |
1099 | if (s->has_label_bindings) | |
1100 | { | |
1101 | struct c_binding *b; | |
1102 | ||
1103 | for (b = s->bindings; b != NULL; b = b->prev) | |
1104 | { | |
1105 | struct c_label_vars *label_vars; | |
1106 | struct c_binding *b1; | |
744f0946 | 1107 | bool hjud; |
e1b7793c ILT |
1108 | unsigned int ix; |
1109 | struct c_goto_bindings *g; | |
1110 | ||
1111 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1112 | continue; | |
1113 | label_vars = b->u.label; | |
1114 | ||
1115 | b1 = label_vars->label_bindings.bindings_in_scope; | |
744f0946 ILT |
1116 | if (label_vars->label_bindings.scope == NULL) |
1117 | hjud = false; | |
1118 | else | |
1119 | hjud = label_vars->label_bindings.scope->has_jump_unsafe_decl; | |
e1b7793c ILT |
1120 | if (update_spot_bindings (scope, &label_vars->label_bindings)) |
1121 | { | |
1122 | /* This label is defined in this scope. */ | |
744f0946 | 1123 | if (hjud) |
e1b7793c | 1124 | { |
744f0946 ILT |
1125 | for (; b1 != NULL; b1 = b1->prev) |
1126 | { | |
1127 | /* A goto from later in the function to this | |
1128 | label will never see the initialization | |
1129 | of B1, if any. Save it to issue a | |
1130 | warning if needed. */ | |
1131 | if (decl_jump_unsafe (b1->decl)) | |
9771b263 | 1132 | vec_safe_push(label_vars->decls_in_scope, b1->decl); |
744f0946 | 1133 | } |
e1b7793c ILT |
1134 | } |
1135 | } | |
1136 | ||
1137 | /* Update the bindings of any goto statements associated | |
1138 | with this label. */ | |
9771b263 | 1139 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1140 | update_spot_bindings (scope, &g->goto_bindings); |
1141 | } | |
1142 | } | |
1143 | ||
1144 | /* Don't search beyond the current function. */ | |
1145 | if (s == current_function_scope) | |
1146 | break; | |
1147 | ||
1148 | s = s->outer; | |
1149 | } | |
1150 | } | |
1151 | ||
9affb2c7 ZW |
1152 | /* Set the TYPE_CONTEXT of all of TYPE's variants to CONTEXT. */ |
1153 | ||
1154 | static void | |
1155 | set_type_context (tree type, tree context) | |
1156 | { | |
1157 | for (type = TYPE_MAIN_VARIANT (type); type; | |
1158 | type = TYPE_NEXT_VARIANT (type)) | |
1159 | TYPE_CONTEXT (type) = context; | |
1160 | } | |
1161 | ||
f8521984 | 1162 | /* Exit a scope. Restore the state of the identifier-decl mappings |
f75fbaf7 ZW |
1163 | that were in effect when this scope was entered. Return a BLOCK |
1164 | node containing all the DECLs in this scope that are of interest | |
1165 | to debug info generation. */ | |
51e29401 RS |
1166 | |
1167 | tree | |
f75fbaf7 | 1168 | pop_scope (void) |
51e29401 | 1169 | { |
f91f41b2 | 1170 | struct c_scope *scope = current_scope; |
f75fbaf7 ZW |
1171 | tree block, context, p; |
1172 | struct c_binding *b; | |
9cd51ef6 | 1173 | |
f75fbaf7 ZW |
1174 | bool functionbody = scope->function_body; |
1175 | bool keep = functionbody || scope->keep || scope->bindings; | |
f91f41b2 | 1176 | |
e1b7793c | 1177 | update_label_decls (scope); |
187230a7 | 1178 | |
f91f41b2 ZW |
1179 | /* If appropriate, create a BLOCK to record the decls for the life |
1180 | of this function. */ | |
1181 | block = 0; | |
1182 | if (keep) | |
1183 | { | |
1184 | block = make_node (BLOCK); | |
f91f41b2 ZW |
1185 | BLOCK_SUBBLOCKS (block) = scope->blocks; |
1186 | TREE_USED (block) = 1; | |
f91f41b2 | 1187 | |
f75fbaf7 | 1188 | /* In each subblock, record that this is its superior. */ |
87caf699 | 1189 | for (p = scope->blocks; p; p = BLOCK_CHAIN (p)) |
f75fbaf7 | 1190 | BLOCK_SUPERCONTEXT (p) = block; |
f91f41b2 | 1191 | |
f75fbaf7 ZW |
1192 | BLOCK_VARS (block) = 0; |
1193 | } | |
339a28b9 | 1194 | |
f75fbaf7 ZW |
1195 | /* The TYPE_CONTEXTs for all of the tagged types belonging to this |
1196 | scope must be set so that they point to the appropriate | |
1197 | construct, i.e. either to the current FUNCTION_DECL node, or | |
1198 | else to the BLOCK node we just constructed. | |
f91f41b2 | 1199 | |
f75fbaf7 ZW |
1200 | Note that for tagged types whose scope is just the formal |
1201 | parameter list for some function type specification, we can't | |
1202 | properly set their TYPE_CONTEXTs here, because we don't have a | |
1203 | pointer to the appropriate FUNCTION_TYPE node readily available | |
1204 | to us. For those cases, the TYPE_CONTEXTs of the relevant tagged | |
1205 | type nodes get set in `grokdeclarator' as soon as we have created | |
1206 | the FUNCTION_TYPE node which will represent the "scope" for these | |
1207 | "parameter list local" tagged types. */ | |
1208 | if (scope->function_body) | |
1209 | context = current_function_decl; | |
1210 | else if (scope == file_scope) | |
eecec698 | 1211 | { |
6be14c0e | 1212 | tree file_decl = build_translation_unit_decl (NULL_TREE); |
eecec698 ZW |
1213 | context = file_decl; |
1214 | } | |
f75fbaf7 ZW |
1215 | else |
1216 | context = block; | |
f91f41b2 | 1217 | |
f75fbaf7 ZW |
1218 | /* Clear all bindings in this scope. */ |
1219 | for (b = scope->bindings; b; b = free_binding_and_advance (b)) | |
339a28b9 | 1220 | { |
f75fbaf7 | 1221 | p = b->decl; |
f91f41b2 | 1222 | switch (TREE_CODE (p)) |
14e33ee8 | 1223 | { |
f91f41b2 | 1224 | case LABEL_DECL: |
f75fbaf7 | 1225 | /* Warnings for unused labels, errors for undefined labels. */ |
f91f41b2 | 1226 | if (TREE_USED (p) && !DECL_INITIAL (p)) |
14e33ee8 | 1227 | { |
dee15844 | 1228 | error ("label %q+D used but not defined", p); |
f91f41b2 | 1229 | DECL_INITIAL (p) = error_mark_node; |
14e33ee8 | 1230 | } |
b8698a0f | 1231 | else |
c616e51b MLI |
1232 | warn_for_unused_label (p); |
1233 | ||
f75fbaf7 | 1234 | /* Labels go in BLOCK_VARS. */ |
910ad8de | 1235 | DECL_CHAIN (p) = BLOCK_VARS (block); |
f75fbaf7 | 1236 | BLOCK_VARS (block) = p; |
366de0ce | 1237 | gcc_assert (I_LABEL_BINDING (b->id) == b); |
c22cacf3 | 1238 | I_LABEL_BINDING (b->id) = b->shadowed; |
e1b7793c ILT |
1239 | |
1240 | /* Also pop back to the shadowed label_vars. */ | |
1241 | release_tree_vector (b->u.label->decls_in_scope); | |
1242 | b->u.label = b->u.label->shadowed; | |
c22cacf3 | 1243 | break; |
339a28b9 | 1244 | |
f75fbaf7 ZW |
1245 | case ENUMERAL_TYPE: |
1246 | case UNION_TYPE: | |
1247 | case RECORD_TYPE: | |
9affb2c7 | 1248 | set_type_context (p, context); |
f75fbaf7 ZW |
1249 | |
1250 | /* Types may not have tag-names, in which case the type | |
1251 | appears in the bindings list with b->id NULL. */ | |
1252 | if (b->id) | |
1253 | { | |
366de0ce | 1254 | gcc_assert (I_TAG_BINDING (b->id) == b); |
f75fbaf7 ZW |
1255 | I_TAG_BINDING (b->id) = b->shadowed; |
1256 | } | |
c22cacf3 | 1257 | break; |
339a28b9 | 1258 | |
f91f41b2 | 1259 | case FUNCTION_DECL: |
f75fbaf7 ZW |
1260 | /* Propagate TREE_ADDRESSABLE from nested functions to their |
1261 | containing functions. */ | |
3f75a254 | 1262 | if (!TREE_ASM_WRITTEN (p) |
f91f41b2 ZW |
1263 | && DECL_INITIAL (p) != 0 |
1264 | && TREE_ADDRESSABLE (p) | |
1265 | && DECL_ABSTRACT_ORIGIN (p) != 0 | |
1266 | && DECL_ABSTRACT_ORIGIN (p) != p) | |
1267 | TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (p)) = 1; | |
73aea290 | 1268 | if (!DECL_EXTERNAL (p) |
71113fcd GK |
1269 | && !DECL_INITIAL (p) |
1270 | && scope != file_scope | |
1271 | && scope != external_scope) | |
73aea290 | 1272 | { |
dee15844 | 1273 | error ("nested function %q+D declared but never defined", p); |
73aea290 JM |
1274 | undef_nested_function = true; |
1275 | } | |
71113fcd GK |
1276 | else if (DECL_DECLARED_INLINE_P (p) |
1277 | && TREE_PUBLIC (p) | |
d0728ae0 JJ |
1278 | && !DECL_INITIAL (p)) |
1279 | { | |
1280 | /* C99 6.7.4p6: "a function with external linkage... declared | |
1281 | with an inline function specifier ... shall also be defined | |
1282 | in the same translation unit." */ | |
6bc8a126 | 1283 | if (!flag_gnu89_inline |
1bc5a451 MP |
1284 | && !lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (p)) |
1285 | && scope != external_scope) | |
d0728ae0 JJ |
1286 | pedwarn (input_location, 0, |
1287 | "inline function %q+D declared but never defined", p); | |
1288 | DECL_EXTERNAL (p) = 1; | |
1289 | } | |
71113fcd | 1290 | |
f75fbaf7 | 1291 | goto common_symbol; |
f91f41b2 ZW |
1292 | |
1293 | case VAR_DECL: | |
caf93cb0 | 1294 | /* Warnings for unused variables. */ |
ebfbbdc5 | 1295 | if ((!TREE_USED (p) || !DECL_READ_P (p)) |
f95f80d1 | 1296 | && !TREE_NO_WARNING (p) |
f91f41b2 ZW |
1297 | && !DECL_IN_SYSTEM_HEADER (p) |
1298 | && DECL_NAME (p) | |
f75fbaf7 | 1299 | && !DECL_ARTIFICIAL (p) |
29128154 | 1300 | && scope != file_scope |
c22cacf3 | 1301 | && scope != external_scope) |
ebfbbdc5 JJ |
1302 | { |
1303 | if (!TREE_USED (p)) | |
1304 | warning (OPT_Wunused_variable, "unused variable %q+D", p); | |
1305 | else if (DECL_CONTEXT (p) == current_function_decl) | |
1306 | warning_at (DECL_SOURCE_LOCATION (p), | |
1307 | OPT_Wunused_but_set_variable, | |
1308 | "variable %qD set but not used", p); | |
1309 | } | |
f75fbaf7 | 1310 | |
0b410f0b JM |
1311 | if (b->inner_comp) |
1312 | { | |
dee15844 JM |
1313 | error ("type of array %q+D completed incompatibly with" |
1314 | " implicit initialization", p); | |
0b410f0b JM |
1315 | } |
1316 | ||
a1105617 | 1317 | /* Fall through. */ |
f75fbaf7 ZW |
1318 | case TYPE_DECL: |
1319 | case CONST_DECL: | |
1320 | common_symbol: | |
1321 | /* All of these go in BLOCK_VARS, but only if this is the | |
1322 | binding in the home scope. */ | |
9aaabf8a | 1323 | if (!b->nested) |
f75fbaf7 | 1324 | { |
910ad8de | 1325 | DECL_CHAIN (p) = BLOCK_VARS (block); |
f75fbaf7 ZW |
1326 | BLOCK_VARS (block) = p; |
1327 | } | |
17fe0fdb | 1328 | else if (VAR_OR_FUNCTION_DECL_P (p) && scope != file_scope) |
b3f27c15 JJ |
1329 | { |
1330 | /* For block local externs add a special | |
1331 | DECL_EXTERNAL decl for debug info generation. */ | |
1332 | tree extp = copy_node (p); | |
1333 | ||
1334 | DECL_EXTERNAL (extp) = 1; | |
1335 | TREE_STATIC (extp) = 0; | |
1336 | TREE_PUBLIC (extp) = 1; | |
1337 | DECL_INITIAL (extp) = NULL_TREE; | |
1338 | DECL_LANG_SPECIFIC (extp) = NULL; | |
1339 | DECL_CONTEXT (extp) = current_function_decl; | |
1340 | if (TREE_CODE (p) == FUNCTION_DECL) | |
1341 | { | |
1342 | DECL_RESULT (extp) = NULL_TREE; | |
1343 | DECL_SAVED_TREE (extp) = NULL_TREE; | |
1344 | DECL_STRUCT_FUNCTION (extp) = NULL; | |
1345 | } | |
1346 | if (b->locus != UNKNOWN_LOCATION) | |
1347 | DECL_SOURCE_LOCATION (extp) = b->locus; | |
910ad8de | 1348 | DECL_CHAIN (extp) = BLOCK_VARS (block); |
b3f27c15 JJ |
1349 | BLOCK_VARS (block) = extp; |
1350 | } | |
116f30c3 RG |
1351 | /* If this is the file scope set DECL_CONTEXT of each decl to |
1352 | the TRANSLATION_UNIT_DECL. This makes same_translation_unit_p | |
1353 | work. */ | |
1354 | if (scope == file_scope) | |
9affb2c7 ZW |
1355 | { |
1356 | DECL_CONTEXT (p) = context; | |
116f30c3 RG |
1357 | if (TREE_CODE (p) == TYPE_DECL |
1358 | && TREE_TYPE (p) != error_mark_node) | |
9affb2c7 ZW |
1359 | set_type_context (TREE_TYPE (p), context); |
1360 | } | |
55d54003 | 1361 | |
f75fbaf7 ZW |
1362 | /* Fall through. */ |
1363 | /* Parameters go in DECL_ARGUMENTS, not BLOCK_VARS, and have | |
1364 | already been put there by store_parm_decls. Unused- | |
1365 | parameter warnings are handled by function.c. | |
1366 | error_mark_node obviously does not go in BLOCK_VARS and | |
1367 | does not get unused-variable warnings. */ | |
1368 | case PARM_DECL: | |
1369 | case ERROR_MARK: | |
1370 | /* It is possible for a decl not to have a name. We get | |
1371 | here with b->id NULL in this case. */ | |
1372 | if (b->id) | |
f91f41b2 | 1373 | { |
366de0ce | 1374 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 | 1375 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
e1b7793c ILT |
1376 | if (b->shadowed && b->shadowed->u.type) |
1377 | TREE_TYPE (b->shadowed->decl) = b->shadowed->u.type; | |
f91f41b2 ZW |
1378 | } |
1379 | break; | |
f75fbaf7 ZW |
1380 | |
1381 | default: | |
366de0ce | 1382 | gcc_unreachable (); |
f91f41b2 ZW |
1383 | } |
1384 | } | |
339a28b9 | 1385 | |
118a3a8b | 1386 | |
f75fbaf7 ZW |
1387 | /* Dispose of the block that we just made inside some higher level. */ |
1388 | if ((scope->function_body || scope == file_scope) && context) | |
339a28b9 | 1389 | { |
f75fbaf7 ZW |
1390 | DECL_INITIAL (context) = block; |
1391 | BLOCK_SUPERCONTEXT (block) = context; | |
339a28b9 | 1392 | } |
f91f41b2 | 1393 | else if (scope->outer) |
3bf40d18 | 1394 | { |
f91f41b2 ZW |
1395 | if (block) |
1396 | SCOPE_LIST_APPEND (scope->outer, blocks, block); | |
1397 | /* If we did not make a block for the scope just exited, any | |
1398 | blocks made for inner scopes must be carried forward so they | |
1399 | will later become subblocks of something else. */ | |
1400 | else if (scope->blocks) | |
1401 | SCOPE_LIST_CONCAT (scope->outer, blocks, scope, blocks); | |
3bf40d18 | 1402 | } |
51e29401 | 1403 | |
f8521984 | 1404 | /* Pop the current scope, and free the structure for reuse. */ |
f75fbaf7 ZW |
1405 | current_scope = scope->outer; |
1406 | if (scope->function_body) | |
1407 | current_function_scope = scope->outer_function; | |
1408 | ||
1409 | memset (scope, 0, sizeof (struct c_scope)); | |
1410 | scope->outer = scope_freelist; | |
1411 | scope_freelist = scope; | |
51e29401 | 1412 | |
51e29401 RS |
1413 | return block; |
1414 | } | |
3bf40d18 | 1415 | |
f75fbaf7 ZW |
1416 | void |
1417 | push_file_scope (void) | |
1418 | { | |
1419 | tree decl; | |
f75fbaf7 | 1420 | |
f6bf7bb6 AP |
1421 | if (file_scope) |
1422 | return; | |
1423 | ||
f75fbaf7 ZW |
1424 | push_scope (); |
1425 | file_scope = current_scope; | |
1426 | ||
1427 | start_fname_decls (); | |
1428 | ||
910ad8de | 1429 | for (decl = visible_builtins; decl; decl = DECL_CHAIN (decl)) |
9aaabf8a | 1430 | bind (DECL_NAME (decl), decl, file_scope, |
b3f27c15 | 1431 | /*invisible=*/false, /*nested=*/true, DECL_SOURCE_LOCATION (decl)); |
f75fbaf7 ZW |
1432 | } |
1433 | ||
1434 | void | |
1435 | pop_file_scope (void) | |
1436 | { | |
1437 | /* In case there were missing closebraces, get us back to the global | |
1438 | binding level. */ | |
1439 | while (current_scope != file_scope) | |
1440 | pop_scope (); | |
1441 | ||
1442 | /* __FUNCTION__ is defined at file scope (""). This | |
1443 | call may not be necessary as my tests indicate it | |
1444 | still works without it. */ | |
1445 | finish_fname_decls (); | |
1446 | ||
991d6621 JM |
1447 | check_inline_statics (); |
1448 | ||
36c1b0de ZW |
1449 | /* This is the point to write out a PCH if we're doing that. |
1450 | In that case we do not want to do anything else. */ | |
f75fbaf7 | 1451 | if (pch_file) |
36c1b0de ZW |
1452 | { |
1453 | c_common_write_pch (); | |
1454 | return; | |
1455 | } | |
f75fbaf7 | 1456 | |
36c1b0de | 1457 | /* Pop off the file scope and close this translation unit. */ |
f75fbaf7 ZW |
1458 | pop_scope (); |
1459 | file_scope = 0; | |
bedb9fc0 RH |
1460 | |
1461 | maybe_apply_pending_pragma_weaks (); | |
f75fbaf7 | 1462 | } |
e1b7793c ILT |
1463 | \f |
1464 | /* Adjust the bindings for the start of a statement expression. */ | |
1465 | ||
1466 | void | |
1467 | c_bindings_start_stmt_expr (struct c_spot_bindings* switch_bindings) | |
1468 | { | |
1469 | struct c_scope *scope; | |
1470 | ||
1471 | for (scope = current_scope; scope != NULL; scope = scope->outer) | |
1472 | { | |
1473 | struct c_binding *b; | |
1474 | ||
1475 | if (!scope->has_label_bindings) | |
1476 | continue; | |
1477 | ||
1478 | for (b = scope->bindings; b != NULL; b = b->prev) | |
1479 | { | |
1480 | struct c_label_vars *label_vars; | |
1481 | unsigned int ix; | |
1482 | struct c_goto_bindings *g; | |
1483 | ||
1484 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1485 | continue; | |
1486 | label_vars = b->u.label; | |
1487 | ++label_vars->label_bindings.stmt_exprs; | |
9771b263 | 1488 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1489 | ++g->goto_bindings.stmt_exprs; |
1490 | } | |
1491 | } | |
1492 | ||
1493 | if (switch_bindings != NULL) | |
1494 | ++switch_bindings->stmt_exprs; | |
1495 | } | |
1496 | ||
1497 | /* Adjust the bindings for the end of a statement expression. */ | |
1498 | ||
1499 | void | |
1500 | c_bindings_end_stmt_expr (struct c_spot_bindings *switch_bindings) | |
1501 | { | |
1502 | struct c_scope *scope; | |
1503 | ||
1504 | for (scope = current_scope; scope != NULL; scope = scope->outer) | |
1505 | { | |
1506 | struct c_binding *b; | |
1507 | ||
1508 | if (!scope->has_label_bindings) | |
1509 | continue; | |
1510 | ||
1511 | for (b = scope->bindings; b != NULL; b = b->prev) | |
1512 | { | |
1513 | struct c_label_vars *label_vars; | |
1514 | unsigned int ix; | |
1515 | struct c_goto_bindings *g; | |
1516 | ||
1517 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1518 | continue; | |
1519 | label_vars = b->u.label; | |
1520 | --label_vars->label_bindings.stmt_exprs; | |
1521 | if (label_vars->label_bindings.stmt_exprs < 0) | |
1522 | { | |
1523 | label_vars->label_bindings.left_stmt_expr = true; | |
1524 | label_vars->label_bindings.stmt_exprs = 0; | |
1525 | } | |
9771b263 | 1526 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1527 | { |
1528 | --g->goto_bindings.stmt_exprs; | |
1529 | if (g->goto_bindings.stmt_exprs < 0) | |
1530 | { | |
1531 | g->goto_bindings.left_stmt_expr = true; | |
1532 | g->goto_bindings.stmt_exprs = 0; | |
1533 | } | |
1534 | } | |
1535 | } | |
1536 | } | |
f75fbaf7 | 1537 | |
e1b7793c ILT |
1538 | if (switch_bindings != NULL) |
1539 | { | |
1540 | --switch_bindings->stmt_exprs; | |
1541 | gcc_assert (switch_bindings->stmt_exprs >= 0); | |
1542 | } | |
1543 | } | |
51e29401 | 1544 | \f |
51e29401 RS |
1545 | /* Push a definition or a declaration of struct, union or enum tag "name". |
1546 | "type" should be the type node. | |
c2255bc4 AH |
1547 | We assume that the tag "name" is not already defined, and has a location |
1548 | of LOC. | |
51e29401 RS |
1549 | |
1550 | Note that the definition may really be just a forward reference. | |
1551 | In that case, the TYPE_SIZE will be zero. */ | |
1552 | ||
f75fbaf7 | 1553 | static void |
c2255bc4 | 1554 | pushtag (location_t loc, tree name, tree type) |
51e29401 | 1555 | { |
14077d68 | 1556 | /* Record the identifier as the type's name if it has none. */ |
f75fbaf7 ZW |
1557 | if (name && !TYPE_NAME (type)) |
1558 | TYPE_NAME (type) = name; | |
24b97832 | 1559 | bind (name, type, current_scope, /*invisible=*/false, /*nested=*/false, loc); |
c138f328 | 1560 | |
51e29401 | 1561 | /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE will be the |
f8521984 | 1562 | tagged type we just added to the current scope. This fake |
51e29401 | 1563 | NULL-named TYPE_DECL node helps dwarfout.c to know when it needs |
858a47b1 | 1564 | to output a representation of a tagged type, and it also gives |
51e29401 RS |
1565 | us a convenient place to record the "scope start" address for the |
1566 | tagged type. */ | |
1567 | ||
c2255bc4 AH |
1568 | TYPE_STUB_DECL (type) = pushdecl (build_decl (loc, |
1569 | TYPE_DECL, NULL_TREE, type)); | |
88dad228 JM |
1570 | |
1571 | /* An approximation for now, so we can tell this is a function-scope tag. | |
f75fbaf7 | 1572 | This will be updated in pop_scope. */ |
88dad228 | 1573 | TYPE_CONTEXT (type) = DECL_CONTEXT (TYPE_STUB_DECL (type)); |
7e5487a2 ILT |
1574 | |
1575 | if (warn_cxx_compat && name != NULL_TREE) | |
1576 | { | |
1577 | struct c_binding *b = I_SYMBOL_BINDING (name); | |
1578 | ||
1579 | if (b != NULL | |
1580 | && b->decl != NULL_TREE | |
1581 | && TREE_CODE (b->decl) == TYPE_DECL | |
1582 | && (B_IN_CURRENT_SCOPE (b) | |
1583 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
1584 | && (TYPE_MAIN_VARIANT (TREE_TYPE (b->decl)) | |
1585 | != TYPE_MAIN_VARIANT (type))) | |
1586 | { | |
1587 | warning_at (loc, OPT_Wc___compat, | |
1588 | ("using %qD as both a typedef and a tag is " | |
1589 | "invalid in C++"), | |
1590 | b->decl); | |
1591 | if (b->locus != UNKNOWN_LOCATION) | |
1592 | inform (b->locus, "originally defined here"); | |
1593 | } | |
1594 | } | |
51e29401 | 1595 | } |
ddc8de03 PM |
1596 | |
1597 | /* An exported interface to pushtag. This is used by the gdb plugin's | |
1598 | binding oracle to introduce a new tag binding. */ | |
1599 | ||
1600 | void | |
1601 | c_pushtag (location_t loc, tree name, tree type) | |
1602 | { | |
1603 | pushtag (loc, name, type); | |
1604 | } | |
1605 | ||
1606 | /* An exported interface to bind a declaration. LOC is the location | |
1607 | to use. DECL is the declaration to bind. The decl's name is used | |
1608 | to determine how it is bound. If DECL is a VAR_DECL, then | |
1609 | IS_GLOBAL determines whether the decl is put into the global (file | |
1610 | and external) scope or the current function's scope; if DECL is not | |
1611 | a VAR_DECL then it is always put into the file scope. */ | |
1612 | ||
1613 | void | |
1614 | c_bind (location_t loc, tree decl, bool is_global) | |
1615 | { | |
1616 | struct c_scope *scope; | |
1617 | bool nested = false; | |
1618 | ||
1619 | if (TREE_CODE (decl) != VAR_DECL || current_function_scope == NULL) | |
1620 | { | |
1621 | /* Types and functions are always considered to be global. */ | |
1622 | scope = file_scope; | |
1623 | DECL_EXTERNAL (decl) = 1; | |
1624 | TREE_PUBLIC (decl) = 1; | |
1625 | } | |
1626 | else if (is_global) | |
1627 | { | |
1628 | /* Also bind it into the external scope. */ | |
1629 | bind (DECL_NAME (decl), decl, external_scope, true, false, loc); | |
1630 | nested = true; | |
1631 | scope = file_scope; | |
1632 | DECL_EXTERNAL (decl) = 1; | |
1633 | TREE_PUBLIC (decl) = 1; | |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | DECL_CONTEXT (decl) = current_function_decl; | |
1638 | TREE_PUBLIC (decl) = 0; | |
1639 | scope = current_function_scope; | |
1640 | } | |
1641 | ||
1642 | bind (DECL_NAME (decl), decl, scope, false, nested, loc); | |
1643 | } | |
51e29401 | 1644 | \f |
3c6e6fbf | 1645 | /* Subroutine of compare_decls. Allow harmless mismatches in return |
6907ddd3 RS |
1646 | and argument types provided that the type modes match. This function |
1647 | return a unified type given a suitable match, and 0 otherwise. */ | |
1648 | ||
1649 | static tree | |
3c6e6fbf | 1650 | match_builtin_function_types (tree newtype, tree oldtype) |
6907ddd3 RS |
1651 | { |
1652 | tree newrettype, oldrettype; | |
1653 | tree newargs, oldargs; | |
1654 | tree trytype, tryargs; | |
1655 | ||
1656 | /* Accept the return type of the new declaration if same modes. */ | |
1657 | oldrettype = TREE_TYPE (oldtype); | |
1658 | newrettype = TREE_TYPE (newtype); | |
1659 | ||
1660 | if (TYPE_MODE (oldrettype) != TYPE_MODE (newrettype)) | |
1661 | return 0; | |
1662 | ||
1663 | oldargs = TYPE_ARG_TYPES (oldtype); | |
1664 | newargs = TYPE_ARG_TYPES (newtype); | |
1665 | tryargs = newargs; | |
1666 | ||
1667 | while (oldargs || newargs) | |
1668 | { | |
3f75a254 JM |
1669 | if (!oldargs |
1670 | || !newargs | |
1671 | || !TREE_VALUE (oldargs) | |
1672 | || !TREE_VALUE (newargs) | |
6907ddd3 RS |
1673 | || TYPE_MODE (TREE_VALUE (oldargs)) |
1674 | != TYPE_MODE (TREE_VALUE (newargs))) | |
1675 | return 0; | |
1676 | ||
1677 | oldargs = TREE_CHAIN (oldargs); | |
1678 | newargs = TREE_CHAIN (newargs); | |
1679 | } | |
1680 | ||
1681 | trytype = build_function_type (newrettype, tryargs); | |
1682 | return build_type_attribute_variant (trytype, TYPE_ATTRIBUTES (oldtype)); | |
1683 | } | |
1684 | ||
1f52178b | 1685 | /* Subroutine of diagnose_mismatched_decls. Check for function type |
3c6e6fbf | 1686 | mismatch involving an empty arglist vs a nonempty one and give clearer |
9ac97460 | 1687 | diagnostics. */ |
3c6e6fbf ZW |
1688 | static void |
1689 | diagnose_arglist_conflict (tree newdecl, tree olddecl, | |
1690 | tree newtype, tree oldtype) | |
1691 | { | |
1692 | tree t; | |
51e29401 | 1693 | |
3c6e6fbf | 1694 | if (TREE_CODE (olddecl) != FUNCTION_DECL |
132da1a5 | 1695 | || !comptypes (TREE_TYPE (oldtype), TREE_TYPE (newtype)) |
f4da8dce NF |
1696 | || !((!prototype_p (oldtype) && DECL_INITIAL (olddecl) == 0) |
1697 | || (!prototype_p (newtype) && DECL_INITIAL (newdecl) == 0))) | |
3c6e6fbf | 1698 | return; |
bf44f7de | 1699 | |
3c6e6fbf ZW |
1700 | t = TYPE_ARG_TYPES (oldtype); |
1701 | if (t == 0) | |
1702 | t = TYPE_ARG_TYPES (newtype); | |
1703 | for (; t; t = TREE_CHAIN (t)) | |
1704 | { | |
1705 | tree type = TREE_VALUE (t); | |
51e29401 | 1706 | |
3c6e6fbf ZW |
1707 | if (TREE_CHAIN (t) == 0 |
1708 | && TYPE_MAIN_VARIANT (type) != void_type_node) | |
1709 | { | |
1f5b3869 | 1710 | inform (input_location, "a parameter list with an ellipsis can%'t match " |
3c6e6fbf ZW |
1711 | "an empty parameter name list declaration"); |
1712 | break; | |
1713 | } | |
1714 | ||
1715 | if (c_type_promotes_to (type) != type) | |
1716 | { | |
1f5b3869 | 1717 | inform (input_location, "an argument type that has a default promotion can%'t match " |
3c6e6fbf ZW |
1718 | "an empty parameter name list declaration"); |
1719 | break; | |
1720 | } | |
1721 | } | |
1722 | } | |
51e29401 | 1723 | |
3c6e6fbf ZW |
1724 | /* Another subroutine of diagnose_mismatched_decls. OLDDECL is an |
1725 | old-style function definition, NEWDECL is a prototype declaration. | |
1726 | Diagnose inconsistencies in the argument list. Returns TRUE if | |
1727 | the prototype is compatible, FALSE if not. */ | |
1728 | static bool | |
1729 | validate_proto_after_old_defn (tree newdecl, tree newtype, tree oldtype) | |
1730 | { | |
bc298aa7 ZW |
1731 | tree newargs, oldargs; |
1732 | int i; | |
1733 | ||
2c83be0c | 1734 | #define END_OF_ARGLIST(t) ((t) == void_type_node) |
bc298aa7 ZW |
1735 | |
1736 | oldargs = TYPE_ACTUAL_ARG_TYPES (oldtype); | |
1737 | newargs = TYPE_ARG_TYPES (newtype); | |
1738 | i = 1; | |
1739 | ||
1740 | for (;;) | |
9162542e | 1741 | { |
ffc44ab6 VR |
1742 | tree oldargtype = TREE_VALUE (oldargs); |
1743 | tree newargtype = TREE_VALUE (newargs); | |
1744 | ||
1745 | if (oldargtype == error_mark_node || newargtype == error_mark_node) | |
1746 | return false; | |
1747 | ||
267bac10 JM |
1748 | oldargtype = (TYPE_ATOMIC (oldargtype) |
1749 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (oldargtype), | |
1750 | TYPE_QUAL_ATOMIC) | |
1751 | : TYPE_MAIN_VARIANT (oldargtype)); | |
1752 | newargtype = (TYPE_ATOMIC (newargtype) | |
1753 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (newargtype), | |
1754 | TYPE_QUAL_ATOMIC) | |
1755 | : TYPE_MAIN_VARIANT (newargtype)); | |
bc298aa7 ZW |
1756 | |
1757 | if (END_OF_ARGLIST (oldargtype) && END_OF_ARGLIST (newargtype)) | |
1758 | break; | |
1759 | ||
1760 | /* Reaching the end of just one list means the two decls don't | |
1761 | agree on the number of arguments. */ | |
1762 | if (END_OF_ARGLIST (oldargtype)) | |
9162542e | 1763 | { |
dee15844 JM |
1764 | error ("prototype for %q+D declares more arguments " |
1765 | "than previous old-style definition", newdecl); | |
bc298aa7 | 1766 | return false; |
9162542e | 1767 | } |
bc298aa7 | 1768 | else if (END_OF_ARGLIST (newargtype)) |
3c6e6fbf | 1769 | { |
dee15844 JM |
1770 | error ("prototype for %q+D declares fewer arguments " |
1771 | "than previous old-style definition", newdecl); | |
3c6e6fbf ZW |
1772 | return false; |
1773 | } | |
bc298aa7 ZW |
1774 | |
1775 | /* Type for passing arg must be consistent with that declared | |
1776 | for the arg. */ | |
3f75a254 | 1777 | else if (!comptypes (oldargtype, newargtype)) |
3c6e6fbf | 1778 | { |
dee15844 | 1779 | error ("prototype for %q+D declares argument %d" |
40b97a2e | 1780 | " with incompatible type", |
dee15844 | 1781 | newdecl, i); |
3c6e6fbf ZW |
1782 | return false; |
1783 | } | |
bc298aa7 ZW |
1784 | |
1785 | oldargs = TREE_CHAIN (oldargs); | |
1786 | newargs = TREE_CHAIN (newargs); | |
1787 | i++; | |
9162542e | 1788 | } |
bc298aa7 ZW |
1789 | |
1790 | /* If we get here, no errors were found, but do issue a warning | |
1791 | for this poor-style construct. */ | |
dee15844 JM |
1792 | warning (0, "prototype for %q+D follows non-prototype definition", |
1793 | newdecl); | |
bc298aa7 ZW |
1794 | return true; |
1795 | #undef END_OF_ARGLIST | |
3c6e6fbf | 1796 | } |
4b4e3407 | 1797 | |
3c6e6fbf ZW |
1798 | /* Subroutine of diagnose_mismatched_decls. Report the location of DECL, |
1799 | first in a pair of mismatched declarations, using the diagnostic | |
1800 | function DIAG. */ | |
1801 | static void | |
71205d17 | 1802 | locate_old_decl (tree decl) |
3c6e6fbf | 1803 | { |
0c249d4b DD |
1804 | if (TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl) |
1805 | && !C_DECL_DECLARED_BUILTIN (decl)) | |
3c6e6fbf ZW |
1806 | ; |
1807 | else if (DECL_INITIAL (decl)) | |
1f5b3869 | 1808 | inform (input_location, "previous definition of %q+D was here", decl); |
3c6e6fbf | 1809 | else if (C_DECL_IMPLICIT (decl)) |
1f5b3869 | 1810 | inform (input_location, "previous implicit declaration of %q+D was here", decl); |
3c6e6fbf | 1811 | else |
1f5b3869 | 1812 | inform (input_location, "previous declaration of %q+D was here", decl); |
3c6e6fbf | 1813 | } |
51e29401 | 1814 | |
3c6e6fbf ZW |
1815 | /* Subroutine of duplicate_decls. Compare NEWDECL to OLDDECL. |
1816 | Returns true if the caller should proceed to merge the two, false | |
1817 | if OLDDECL should simply be discarded. As a side effect, issues | |
1818 | all necessary diagnostics for invalid or poor-style combinations. | |
1819 | If it returns true, writes the types of NEWDECL and OLDDECL to | |
1820 | *NEWTYPEP and *OLDTYPEP - these may have been adjusted from | |
1821 | TREE_TYPE (NEWDECL, OLDDECL) respectively. */ | |
1822 | ||
1823 | static bool | |
1824 | diagnose_mismatched_decls (tree newdecl, tree olddecl, | |
1825 | tree *newtypep, tree *oldtypep) | |
1826 | { | |
1827 | tree newtype, oldtype; | |
1828 | bool pedwarned = false; | |
1829 | bool warned = false; | |
f8f5c4b3 | 1830 | bool retval = true; |
3c6e6fbf | 1831 | |
6663ee3b EC |
1832 | #define DECL_EXTERN_INLINE(DECL) (DECL_DECLARED_INLINE_P (DECL) \ |
1833 | && DECL_EXTERNAL (DECL)) | |
1834 | ||
3c6e6fbf ZW |
1835 | /* If we have error_mark_node for either decl or type, just discard |
1836 | the previous decl - we're in an error cascade already. */ | |
1837 | if (olddecl == error_mark_node || newdecl == error_mark_node) | |
1838 | return false; | |
bc298aa7 ZW |
1839 | *oldtypep = oldtype = TREE_TYPE (olddecl); |
1840 | *newtypep = newtype = TREE_TYPE (newdecl); | |
3c6e6fbf ZW |
1841 | if (oldtype == error_mark_node || newtype == error_mark_node) |
1842 | return false; | |
1843 | ||
1844 | /* Two different categories of symbol altogether. This is an error | |
1845 | unless OLDDECL is a builtin. OLDDECL will be discarded in any case. */ | |
51e29401 RS |
1846 | if (TREE_CODE (olddecl) != TREE_CODE (newdecl)) |
1847 | { | |
f75fbaf7 ZW |
1848 | if (!(TREE_CODE (olddecl) == FUNCTION_DECL |
1849 | && DECL_BUILT_IN (olddecl) | |
1850 | && !C_DECL_DECLARED_BUILTIN (olddecl))) | |
51e29401 | 1851 | { |
dee15844 | 1852 | error ("%q+D redeclared as different kind of symbol", newdecl); |
71205d17 | 1853 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
1854 | } |
1855 | else if (TREE_PUBLIC (newdecl)) | |
dee15844 JM |
1856 | warning (0, "built-in function %q+D declared as non-function", |
1857 | newdecl); | |
44c21c7f | 1858 | else |
dee15844 JM |
1859 | warning (OPT_Wshadow, "declaration of %q+D shadows " |
1860 | "a built-in function", newdecl); | |
3c6e6fbf ZW |
1861 | return false; |
1862 | } | |
1863 | ||
085e33aa JM |
1864 | /* Enumerators have no linkage, so may only be declared once in a |
1865 | given scope. */ | |
1866 | if (TREE_CODE (olddecl) == CONST_DECL) | |
1867 | { | |
dee15844 | 1868 | error ("redeclaration of enumerator %q+D", newdecl); |
71205d17 | 1869 | locate_old_decl (olddecl); |
085e33aa JM |
1870 | return false; |
1871 | } | |
1872 | ||
132da1a5 | 1873 | if (!comptypes (oldtype, newtype)) |
3c6e6fbf | 1874 | { |
a6f78652 | 1875 | if (TREE_CODE (olddecl) == FUNCTION_DECL |
f75fbaf7 | 1876 | && DECL_BUILT_IN (olddecl) && !C_DECL_DECLARED_BUILTIN (olddecl)) |
3c6e6fbf ZW |
1877 | { |
1878 | /* Accept harmless mismatch in function types. | |
1879 | This is for the ffs and fprintf builtins. */ | |
1880 | tree trytype = match_builtin_function_types (newtype, oldtype); | |
1881 | ||
132da1a5 | 1882 | if (trytype && comptypes (newtype, trytype)) |
bc298aa7 | 1883 | *oldtypep = oldtype = trytype; |
3c6e6fbf | 1884 | else |
51e29401 | 1885 | { |
3c6e6fbf ZW |
1886 | /* If types don't match for a built-in, throw away the |
1887 | built-in. No point in calling locate_old_decl here, it | |
9ac97460 | 1888 | won't print anything. */ |
dee15844 JM |
1889 | warning (0, "conflicting types for built-in function %q+D", |
1890 | newdecl); | |
3c6e6fbf | 1891 | return false; |
51e29401 | 1892 | } |
3c6e6fbf ZW |
1893 | } |
1894 | else if (TREE_CODE (olddecl) == FUNCTION_DECL | |
3c20847b | 1895 | && DECL_IS_BUILTIN (olddecl)) |
3c6e6fbf ZW |
1896 | { |
1897 | /* A conflicting function declaration for a predeclared | |
1898 | function that isn't actually built in. Objective C uses | |
1899 | these. The new declaration silently overrides everything | |
1900 | but the volatility (i.e. noreturn) indication. See also | |
1901 | below. FIXME: Make Objective C use normal builtins. */ | |
1902 | TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl); | |
1903 | return false; | |
1904 | } | |
1905 | /* Permit void foo (...) to match int foo (...) if the latter is | |
1906 | the definition and implicit int was used. See | |
1907 | c-torture/compile/920625-2.c. */ | |
1908 | else if (TREE_CODE (newdecl) == FUNCTION_DECL && DECL_INITIAL (newdecl) | |
1909 | && TYPE_MAIN_VARIANT (TREE_TYPE (oldtype)) == void_type_node | |
1910 | && TYPE_MAIN_VARIANT (TREE_TYPE (newtype)) == integer_type_node | |
12869142 | 1911 | && C_FUNCTION_IMPLICIT_INT (newdecl) && !DECL_INITIAL (olddecl)) |
3c6e6fbf | 1912 | { |
509c9d60 MLI |
1913 | pedwarned = pedwarn (input_location, 0, |
1914 | "conflicting types for %q+D", newdecl); | |
3c6e6fbf | 1915 | /* Make sure we keep void as the return type. */ |
bc298aa7 | 1916 | TREE_TYPE (newdecl) = *newtypep = newtype = oldtype; |
3c6e6fbf | 1917 | C_FUNCTION_IMPLICIT_INT (newdecl) = 0; |
51e29401 | 1918 | } |
12869142 DJ |
1919 | /* Permit void foo (...) to match an earlier call to foo (...) with |
1920 | no declared type (thus, implicitly int). */ | |
1921 | else if (TREE_CODE (newdecl) == FUNCTION_DECL | |
1922 | && TYPE_MAIN_VARIANT (TREE_TYPE (newtype)) == void_type_node | |
1923 | && TYPE_MAIN_VARIANT (TREE_TYPE (oldtype)) == integer_type_node | |
1924 | && C_DECL_IMPLICIT (olddecl) && !DECL_INITIAL (olddecl)) | |
1925 | { | |
509c9d60 MLI |
1926 | pedwarned = pedwarn (input_location, 0, |
1927 | "conflicting types for %q+D", newdecl); | |
12869142 DJ |
1928 | /* Make sure we keep void as the return type. */ |
1929 | TREE_TYPE (olddecl) = *oldtypep = oldtype = newtype; | |
12869142 | 1930 | } |
51e29401 RS |
1931 | else |
1932 | { | |
36c5e70a BE |
1933 | int new_quals = TYPE_QUALS (newtype); |
1934 | int old_quals = TYPE_QUALS (oldtype); | |
1935 | ||
1936 | if (new_quals != old_quals) | |
1937 | { | |
1938 | addr_space_t new_addr = DECODE_QUAL_ADDR_SPACE (new_quals); | |
1939 | addr_space_t old_addr = DECODE_QUAL_ADDR_SPACE (old_quals); | |
1940 | if (new_addr != old_addr) | |
1941 | { | |
1942 | if (ADDR_SPACE_GENERIC_P (new_addr)) | |
1943 | error ("conflicting named address spaces (generic vs %s) " | |
1944 | "for %q+D", | |
1945 | c_addr_space_name (old_addr), newdecl); | |
1946 | else if (ADDR_SPACE_GENERIC_P (old_addr)) | |
1947 | error ("conflicting named address spaces (%s vs generic) " | |
1948 | "for %q+D", | |
1949 | c_addr_space_name (new_addr), newdecl); | |
1950 | else | |
1951 | error ("conflicting named address spaces (%s vs %s) " | |
1952 | "for %q+D", | |
1953 | c_addr_space_name (new_addr), | |
1954 | c_addr_space_name (old_addr), | |
1955 | newdecl); | |
1956 | } | |
1957 | ||
1958 | if (CLEAR_QUAL_ADDR_SPACE (new_quals) | |
1959 | != CLEAR_QUAL_ADDR_SPACE (old_quals)) | |
1960 | error ("conflicting type qualifiers for %q+D", newdecl); | |
1961 | } | |
118a3a8b | 1962 | else |
dee15844 | 1963 | error ("conflicting types for %q+D", newdecl); |
3c6e6fbf | 1964 | diagnose_arglist_conflict (newdecl, olddecl, newtype, oldtype); |
71205d17 | 1965 | locate_old_decl (olddecl); |
3c6e6fbf | 1966 | return false; |
51e29401 | 1967 | } |
51e29401 RS |
1968 | } |
1969 | ||
3c6e6fbf ZW |
1970 | /* Redeclaration of a type is a constraint violation (6.7.2.3p1), |
1971 | but silently ignore the redeclaration if either is in a system | |
dc5027f4 | 1972 | header. (Conflicting redeclarations were handled above.) This |
48b0b196 | 1973 | is allowed for C11 if the types are the same, not just |
dc5027f4 | 1974 | compatible. */ |
3c6e6fbf | 1975 | if (TREE_CODE (newdecl) == TYPE_DECL) |
339a28b9 | 1976 | { |
dc5027f4 JM |
1977 | bool types_different = false; |
1978 | int comptypes_result; | |
1979 | ||
1980 | comptypes_result | |
1981 | = comptypes_check_different_types (oldtype, newtype, &types_different); | |
1982 | ||
1983 | if (comptypes_result != 1 || types_different) | |
1984 | { | |
1985 | error ("redefinition of typedef %q+D with different type", newdecl); | |
1986 | locate_old_decl (olddecl); | |
1987 | return false; | |
1988 | } | |
1989 | ||
df0ed6c5 RAE |
1990 | if (DECL_IN_SYSTEM_HEADER (newdecl) |
1991 | || DECL_IN_SYSTEM_HEADER (olddecl) | |
1992 | || TREE_NO_WARNING (newdecl) | |
1993 | || TREE_NO_WARNING (olddecl)) | |
a1105617 | 1994 | return true; /* Allow OLDDECL to continue in use. */ |
118a3a8b | 1995 | |
8bf872f9 | 1996 | if (variably_modified_type_p (newtype, NULL)) |
dc5027f4 | 1997 | { |
8bf872f9 JM |
1998 | error ("redefinition of typedef %q+D with variably modified type", |
1999 | newdecl); | |
dc5027f4 JM |
2000 | locate_old_decl (olddecl); |
2001 | } | |
35aff4fb MP |
2002 | else if (pedwarn_c99 (input_location, OPT_Wpedantic, |
2003 | "redefinition of typedef %q+D", newdecl)) | |
2004 | locate_old_decl (olddecl); | |
dc5027f4 JM |
2005 | |
2006 | return true; | |
339a28b9 | 2007 | } |
51e29401 | 2008 | |
3c6e6fbf ZW |
2009 | /* Function declarations can either be 'static' or 'extern' (no |
2010 | qualifier is equivalent to 'extern' - C99 6.2.2p5) and therefore | |
71113fcd GK |
2011 | can never conflict with each other on account of linkage |
2012 | (6.2.2p4). Multiple definitions are not allowed (6.9p3,5) but | |
2013 | gnu89 mode permits two definitions if one is 'extern inline' and | |
2014 | one is not. The non- extern-inline definition supersedes the | |
2015 | extern-inline definition. */ | |
6663ee3b | 2016 | |
3c6e6fbf | 2017 | else if (TREE_CODE (newdecl) == FUNCTION_DECL) |
51e29401 | 2018 | { |
04b8f97f ZW |
2019 | /* If you declare a built-in function name as static, or |
2020 | define the built-in with an old-style definition (so we | |
2021 | can't validate the argument list) the built-in definition is | |
2022 | overridden, but optionally warn this was a bad choice of name. */ | |
2023 | if (DECL_BUILT_IN (olddecl) | |
f75fbaf7 | 2024 | && !C_DECL_DECLARED_BUILTIN (olddecl) |
04b8f97f ZW |
2025 | && (!TREE_PUBLIC (newdecl) |
2026 | || (DECL_INITIAL (newdecl) | |
f4da8dce | 2027 | && !prototype_p (TREE_TYPE (newdecl))))) |
51e29401 | 2028 | { |
dee15844 JM |
2029 | warning (OPT_Wshadow, "declaration of %q+D shadows " |
2030 | "a built-in function", newdecl); | |
51e29401 | 2031 | /* Discard the old built-in function. */ |
3c6e6fbf | 2032 | return false; |
51e29401 | 2033 | } |
118a3a8b | 2034 | |
3c6e6fbf | 2035 | if (DECL_INITIAL (newdecl)) |
4c41bbfa | 2036 | { |
f8f5c4b3 | 2037 | if (DECL_INITIAL (olddecl)) |
6907ddd3 | 2038 | { |
6663ee3b | 2039 | /* If both decls are in the same TU and the new declaration |
619519c8 | 2040 | isn't overriding an extern inline reject the new decl. |
71113fcd GK |
2041 | In c99, no overriding is allowed in the same translation |
2042 | unit. */ | |
2043 | if ((!DECL_EXTERN_INLINE (olddecl) | |
2044 | || DECL_EXTERN_INLINE (newdecl) | |
da1c7394 | 2045 | || (!flag_gnu89_inline |
4eb7fd83 JJ |
2046 | && (!DECL_DECLARED_INLINE_P (olddecl) |
2047 | || !lookup_attribute ("gnu_inline", | |
2048 | DECL_ATTRIBUTES (olddecl))) | |
2049 | && (!DECL_DECLARED_INLINE_P (newdecl) | |
2050 | || !lookup_attribute ("gnu_inline", | |
2051 | DECL_ATTRIBUTES (newdecl)))) | |
4eb7fd83 | 2052 | ) |
f8f5c4b3 AP |
2053 | && same_translation_unit_p (newdecl, olddecl)) |
2054 | { | |
dee15844 | 2055 | error ("redefinition of %q+D", newdecl); |
71205d17 | 2056 | locate_old_decl (olddecl); |
f8f5c4b3 AP |
2057 | return false; |
2058 | } | |
6663ee3b | 2059 | } |
4c41bbfa | 2060 | } |
3c6e6fbf ZW |
2061 | /* If we have a prototype after an old-style function definition, |
2062 | the argument types must be checked specially. */ | |
2063 | else if (DECL_INITIAL (olddecl) | |
f4da8dce | 2064 | && !prototype_p (oldtype) && prototype_p (newtype) |
3c6e6fbf ZW |
2065 | && TYPE_ACTUAL_ARG_TYPES (oldtype) |
2066 | && !validate_proto_after_old_defn (newdecl, newtype, oldtype)) | |
52b6a22f | 2067 | { |
71205d17 | 2068 | locate_old_decl (olddecl); |
3c6e6fbf | 2069 | return false; |
52b6a22f | 2070 | } |
9aaabf8a ZW |
2071 | /* A non-static declaration (even an "extern") followed by a |
2072 | static declaration is undefined behavior per C99 6.2.2p3-5,7. | |
2073 | The same is true for a static forward declaration at block | |
2074 | scope followed by a non-static declaration/definition at file | |
2075 | scope. Static followed by non-static at the same scope is | |
2076 | not undefined behavior, and is the most convenient way to get | |
2077 | some effects (see e.g. what unwind-dw2-fde-glibc.c does to | |
2078 | the definition of _Unwind_Find_FDE in unwind-dw2-fde.c), but | |
8c27b7d4 | 2079 | we do diagnose it if -Wtraditional. */ |
3c6e6fbf | 2080 | if (TREE_PUBLIC (olddecl) && !TREE_PUBLIC (newdecl)) |
51e29401 | 2081 | { |
9aaabf8a ZW |
2082 | /* Two exceptions to the rule. If olddecl is an extern |
2083 | inline, or a predeclared function that isn't actually | |
2084 | built in, newdecl silently overrides olddecl. The latter | |
2085 | occur only in Objective C; see also above. (FIXME: Make | |
2086 | Objective C use normal builtins.) */ | |
2087 | if (!DECL_IS_BUILTIN (olddecl) | |
6663ee3b | 2088 | && !DECL_EXTERN_INLINE (olddecl)) |
3c6e6fbf | 2089 | { |
dee15844 JM |
2090 | error ("static declaration of %q+D follows " |
2091 | "non-static declaration", newdecl); | |
71205d17 | 2092 | locate_old_decl (olddecl); |
3c6e6fbf | 2093 | } |
9aaabf8a | 2094 | return false; |
51e29401 | 2095 | } |
9aaabf8a | 2096 | else if (TREE_PUBLIC (newdecl) && !TREE_PUBLIC (olddecl)) |
e841f997 | 2097 | { |
9aaabf8a ZW |
2098 | if (DECL_CONTEXT (olddecl)) |
2099 | { | |
dee15844 JM |
2100 | error ("non-static declaration of %q+D follows " |
2101 | "static declaration", newdecl); | |
71205d17 | 2102 | locate_old_decl (olddecl); |
9aaabf8a ZW |
2103 | return false; |
2104 | } | |
2105 | else if (warn_traditional) | |
2106 | { | |
b8698a0f | 2107 | warned |= warning (OPT_Wtraditional, |
71205d17 MLI |
2108 | "non-static declaration of %q+D " |
2109 | "follows static declaration", newdecl); | |
9aaabf8a | 2110 | } |
e841f997 | 2111 | } |
4eb7fd83 JJ |
2112 | |
2113 | /* Make sure gnu_inline attribute is either not present, or | |
2114 | present on all inline decls. */ | |
2115 | if (DECL_DECLARED_INLINE_P (olddecl) | |
2116 | && DECL_DECLARED_INLINE_P (newdecl)) | |
2117 | { | |
2118 | bool newa = lookup_attribute ("gnu_inline", | |
2119 | DECL_ATTRIBUTES (newdecl)) != NULL; | |
2120 | bool olda = lookup_attribute ("gnu_inline", | |
2121 | DECL_ATTRIBUTES (olddecl)) != NULL; | |
2122 | if (newa != olda) | |
2123 | { | |
c5d75364 MLI |
2124 | error_at (input_location, "%<gnu_inline%> attribute present on %q+D", |
2125 | newa ? newdecl : olddecl); | |
2126 | error_at (DECL_SOURCE_LOCATION (newa ? olddecl : newdecl), | |
2127 | "but not here"); | |
4eb7fd83 JJ |
2128 | } |
2129 | } | |
51e29401 | 2130 | } |
3c6e6fbf | 2131 | else if (TREE_CODE (newdecl) == VAR_DECL) |
339a28b9 | 2132 | { |
3c6e6fbf ZW |
2133 | /* Only variables can be thread-local, and all declarations must |
2134 | agree on this property. */ | |
953ff289 DN |
2135 | if (C_DECL_THREADPRIVATE_P (olddecl) && !DECL_THREAD_LOCAL_P (newdecl)) |
2136 | { | |
2137 | /* Nothing to check. Since OLDDECL is marked threadprivate | |
2138 | and NEWDECL does not have a thread-local attribute, we | |
2139 | will merge the threadprivate attribute into NEWDECL. */ | |
2140 | ; | |
2141 | } | |
2142 | else if (DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)) | |
51e29401 | 2143 | { |
c2f7fa15 | 2144 | if (DECL_THREAD_LOCAL_P (newdecl)) |
dee15844 JM |
2145 | error ("thread-local declaration of %q+D follows " |
2146 | "non-thread-local declaration", newdecl); | |
3c6e6fbf | 2147 | else |
dee15844 JM |
2148 | error ("non-thread-local declaration of %q+D follows " |
2149 | "thread-local declaration", newdecl); | |
51e29401 | 2150 | |
71205d17 | 2151 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
2152 | return false; |
2153 | } | |
51e29401 | 2154 | |
3c6e6fbf ZW |
2155 | /* Multiple initialized definitions are not allowed (6.9p3,5). */ |
2156 | if (DECL_INITIAL (newdecl) && DECL_INITIAL (olddecl)) | |
2157 | { | |
dee15844 | 2158 | error ("redefinition of %q+D", newdecl); |
71205d17 | 2159 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
2160 | return false; |
2161 | } | |
2162 | ||
9aaabf8a ZW |
2163 | /* Objects declared at file scope: if the first declaration had |
2164 | external linkage (even if it was an external reference) the | |
2165 | second must have external linkage as well, or the behavior is | |
2166 | undefined. If the first declaration had internal linkage, then | |
2167 | the second must too, or else be an external reference (in which | |
2168 | case the composite declaration still has internal linkage). | |
2169 | As for function declarations, we warn about the static-then- | |
2170 | extern case only for -Wtraditional. See generally 6.2.2p3-5,7. */ | |
2171 | if (DECL_FILE_SCOPE_P (newdecl) | |
2172 | && TREE_PUBLIC (newdecl) != TREE_PUBLIC (olddecl)) | |
3c6e6fbf | 2173 | { |
9aaabf8a ZW |
2174 | if (DECL_EXTERNAL (newdecl)) |
2175 | { | |
558d1f81 JM |
2176 | if (!DECL_FILE_SCOPE_P (olddecl)) |
2177 | { | |
dee15844 JM |
2178 | error ("extern declaration of %q+D follows " |
2179 | "declaration with no linkage", newdecl); | |
71205d17 | 2180 | locate_old_decl (olddecl); |
558d1f81 JM |
2181 | return false; |
2182 | } | |
2183 | else if (warn_traditional) | |
9aaabf8a | 2184 | { |
b8698a0f | 2185 | warned |= warning (OPT_Wtraditional, |
71205d17 MLI |
2186 | "non-static declaration of %q+D " |
2187 | "follows static declaration", newdecl); | |
9aaabf8a ZW |
2188 | } |
2189 | } | |
2190 | else | |
3c6e6fbf ZW |
2191 | { |
2192 | if (TREE_PUBLIC (newdecl)) | |
dee15844 JM |
2193 | error ("non-static declaration of %q+D follows " |
2194 | "static declaration", newdecl); | |
3c6e6fbf | 2195 | else |
dee15844 JM |
2196 | error ("static declaration of %q+D follows " |
2197 | "non-static declaration", newdecl); | |
3c6e6fbf | 2198 | |
71205d17 | 2199 | locate_old_decl (olddecl); |
3c6e6fbf | 2200 | return false; |
51e29401 RS |
2201 | } |
2202 | } | |
3c6e6fbf ZW |
2203 | /* Two objects with the same name declared at the same block |
2204 | scope must both be external references (6.7p3). */ | |
558d1f81 | 2205 | else if (!DECL_FILE_SCOPE_P (newdecl)) |
3c6e6fbf ZW |
2206 | { |
2207 | if (DECL_EXTERNAL (newdecl)) | |
0b410f0b JM |
2208 | { |
2209 | /* Extern with initializer at block scope, which will | |
2210 | already have received an error. */ | |
2211 | } | |
3c6e6fbf | 2212 | else if (DECL_EXTERNAL (olddecl)) |
0b410f0b | 2213 | { |
dee15844 JM |
2214 | error ("declaration of %q+D with no linkage follows " |
2215 | "extern declaration", newdecl); | |
71205d17 | 2216 | locate_old_decl (olddecl); |
0b410f0b | 2217 | } |
3c6e6fbf | 2218 | else |
0b410f0b | 2219 | { |
dee15844 | 2220 | error ("redeclaration of %q+D with no linkage", newdecl); |
71205d17 | 2221 | locate_old_decl (olddecl); |
0b410f0b | 2222 | } |
ecf92f82 | 2223 | |
3c6e6fbf ZW |
2224 | return false; |
2225 | } | |
7a5d2eb8 ILT |
2226 | |
2227 | /* C++ does not permit a decl to appear multiple times at file | |
2228 | scope. */ | |
2229 | if (warn_cxx_compat | |
2230 | && DECL_FILE_SCOPE_P (newdecl) | |
2231 | && !DECL_EXTERNAL (newdecl) | |
2232 | && !DECL_EXTERNAL (olddecl)) | |
2233 | warned |= warning_at (DECL_SOURCE_LOCATION (newdecl), | |
2234 | OPT_Wc___compat, | |
2235 | ("duplicate declaration of %qD is " | |
2236 | "invalid in C++"), | |
2237 | newdecl); | |
1ae0ccb6 | 2238 | } |
3c6e6fbf ZW |
2239 | |
2240 | /* warnings */ | |
d7afec4b | 2241 | /* All decls must agree on a visibility. */ |
c22cacf3 | 2242 | if (CODE_CONTAINS_STRUCT (TREE_CODE (newdecl), TS_DECL_WITH_VIS) |
820cc88f | 2243 | && DECL_VISIBILITY_SPECIFIED (newdecl) && DECL_VISIBILITY_SPECIFIED (olddecl) |
3c6e6fbf | 2244 | && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl)) |
1ae0ccb6 | 2245 | { |
71205d17 MLI |
2246 | warned |= warning (0, "redeclaration of %q+D with different visibility " |
2247 | "(old visibility preserved)", newdecl); | |
1ae0ccb6 | 2248 | } |
3c6e6fbf ZW |
2249 | |
2250 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
51e29401 | 2251 | { |
3c6e6fbf ZW |
2252 | /* Diagnose inline __attribute__ ((noinline)) which is silly. */ |
2253 | if (DECL_DECLARED_INLINE_P (newdecl) | |
2254 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl))) | |
45484dcf MP |
2255 | warned |= warning (OPT_Wattributes, |
2256 | "inline declaration of %qD follows " | |
2257 | "declaration with attribute noinline", newdecl); | |
3c6e6fbf ZW |
2258 | else if (DECL_DECLARED_INLINE_P (olddecl) |
2259 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl))) | |
45484dcf MP |
2260 | warned |= warning (OPT_Wattributes, |
2261 | "declaration of %q+D with attribute " | |
2262 | "noinline follows inline declaration ", newdecl); | |
2263 | else if (lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)) | |
2264 | && lookup_attribute ("always_inline", DECL_ATTRIBUTES (olddecl))) | |
2265 | warned |= warning (OPT_Wattributes, | |
2266 | "declaration of %q+D with attribute " | |
2267 | "%qs follows declaration with attribute %qs", | |
2268 | newdecl, "noinline", "always_inline"); | |
2269 | else if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (newdecl)) | |
2270 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl))) | |
2271 | warned |= warning (OPT_Wattributes, | |
2272 | "declaration of %q+D with attribute " | |
2273 | "%qs follows declaration with attribute %qs", | |
2274 | newdecl, "always_inline", "noinline"); | |
2275 | else if (lookup_attribute ("cold", DECL_ATTRIBUTES (newdecl)) | |
2276 | && lookup_attribute ("hot", DECL_ATTRIBUTES (olddecl))) | |
2277 | warned |= warning (OPT_Wattributes, | |
2278 | "declaration of %q+D with attribute %qs follows " | |
2279 | "declaration with attribute %qs", newdecl, "cold", | |
2280 | "hot"); | |
2281 | else if (lookup_attribute ("hot", DECL_ATTRIBUTES (newdecl)) | |
2282 | && lookup_attribute ("cold", DECL_ATTRIBUTES (olddecl))) | |
2283 | warned |= warning (OPT_Wattributes, | |
2284 | "declaration of %q+D with attribute %qs follows " | |
2285 | "declaration with attribute %qs", newdecl, "hot", | |
2286 | "cold"); | |
3c6e6fbf | 2287 | } |
3205a71e | 2288 | else /* PARM_DECL, VAR_DECL */ |
3c6e6fbf | 2289 | { |
f75fbaf7 ZW |
2290 | /* Redeclaration of a parameter is a constraint violation (this is |
2291 | not explicitly stated, but follows from C99 6.7p3 [no more than | |
2292 | one declaration of the same identifier with no linkage in the | |
2293 | same scope, except type tags] and 6.2.2p6 [parameters have no | |
2294 | linkage]). We must check for a forward parameter declaration, | |
2295 | indicated by TREE_ASM_WRITTEN on the old declaration - this is | |
2296 | an extension, the mandatory diagnostic for which is handled by | |
2297 | mark_forward_parm_decls. */ | |
2298 | ||
3205a71e ZW |
2299 | if (TREE_CODE (newdecl) == PARM_DECL |
2300 | && (!TREE_ASM_WRITTEN (olddecl) || TREE_ASM_WRITTEN (newdecl))) | |
2301 | { | |
dee15844 | 2302 | error ("redefinition of parameter %q+D", newdecl); |
71205d17 | 2303 | locate_old_decl (olddecl); |
3205a71e ZW |
2304 | return false; |
2305 | } | |
51e29401 RS |
2306 | } |
2307 | ||
3c6e6fbf ZW |
2308 | /* Optional warning for completely redundant decls. */ |
2309 | if (!warned && !pedwarned | |
2310 | && warn_redundant_decls | |
2311 | /* Don't warn about a function declaration followed by a | |
2312 | definition. */ | |
3205a71e ZW |
2313 | && !(TREE_CODE (newdecl) == FUNCTION_DECL |
2314 | && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)) | |
8c27b7d4 | 2315 | /* Don't warn about redundant redeclarations of builtins. */ |
c5e36c09 ZW |
2316 | && !(TREE_CODE (newdecl) == FUNCTION_DECL |
2317 | && !DECL_BUILT_IN (newdecl) | |
2318 | && DECL_BUILT_IN (olddecl) | |
2319 | && !C_DECL_DECLARED_BUILTIN (olddecl)) | |
3205a71e ZW |
2320 | /* Don't warn about an extern followed by a definition. */ |
2321 | && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl)) | |
2322 | /* Don't warn about forward parameter decls. */ | |
2323 | && !(TREE_CODE (newdecl) == PARM_DECL | |
52d09157 CR |
2324 | && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)) |
2325 | /* Don't warn about a variable definition following a declaration. */ | |
2326 | && !(TREE_CODE (newdecl) == VAR_DECL | |
2327 | && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl))) | |
27f427f8 | 2328 | { |
71205d17 MLI |
2329 | warned = warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D", |
2330 | newdecl); | |
27f427f8 RS |
2331 | } |
2332 | ||
71205d17 | 2333 | /* Report location of previous decl/defn. */ |
3c6e6fbf | 2334 | if (warned || pedwarned) |
71205d17 | 2335 | locate_old_decl (olddecl); |
664b4b1e | 2336 | |
6663ee3b EC |
2337 | #undef DECL_EXTERN_INLINE |
2338 | ||
f8f5c4b3 | 2339 | return retval; |
3c6e6fbf | 2340 | } |
51e29401 | 2341 | |
3c6e6fbf ZW |
2342 | /* Subroutine of duplicate_decls. NEWDECL has been found to be |
2343 | consistent with OLDDECL, but carries new information. Merge the | |
1ef82ef2 | 2344 | new information into OLDDECL. This function issues no |
3c6e6fbf ZW |
2345 | diagnostics. */ |
2346 | ||
2347 | static void | |
1ef82ef2 | 2348 | merge_decls (tree newdecl, tree olddecl, tree newtype, tree oldtype) |
3c6e6fbf | 2349 | { |
71113fcd GK |
2350 | bool new_is_definition = (TREE_CODE (newdecl) == FUNCTION_DECL |
2351 | && DECL_INITIAL (newdecl) != 0); | |
2352 | bool new_is_prototype = (TREE_CODE (newdecl) == FUNCTION_DECL | |
f4da8dce | 2353 | && prototype_p (TREE_TYPE (newdecl))); |
71113fcd | 2354 | bool old_is_prototype = (TREE_CODE (olddecl) == FUNCTION_DECL |
f4da8dce | 2355 | && prototype_p (TREE_TYPE (olddecl))); |
3c6e6fbf | 2356 | |
f75fbaf7 ZW |
2357 | /* For real parm decl following a forward decl, rechain the old decl |
2358 | in its new location and clear TREE_ASM_WRITTEN (it's not a | |
2359 | forward decl anymore). */ | |
3c6e6fbf | 2360 | if (TREE_CODE (newdecl) == PARM_DECL |
3f75a254 | 2361 | && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)) |
51e29401 | 2362 | { |
f75fbaf7 ZW |
2363 | struct c_binding *b, **here; |
2364 | ||
2365 | for (here = ¤t_scope->bindings; *here; here = &(*here)->prev) | |
2366 | if ((*here)->decl == olddecl) | |
2367 | goto found; | |
366de0ce | 2368 | gcc_unreachable (); |
f75fbaf7 ZW |
2369 | |
2370 | found: | |
2371 | b = *here; | |
2372 | *here = b->prev; | |
2373 | b->prev = current_scope->bindings; | |
2374 | current_scope->bindings = b; | |
2375 | ||
3c6e6fbf | 2376 | TREE_ASM_WRITTEN (olddecl) = 0; |
3c6e6fbf ZW |
2377 | } |
2378 | ||
2379 | DECL_ATTRIBUTES (newdecl) | |
5fd9b178 | 2380 | = targetm.merge_decl_attributes (olddecl, newdecl); |
bf44f7de | 2381 | |
3c6e6fbf | 2382 | /* Merge the data types specified in the two decls. */ |
1ef82ef2 ZW |
2383 | TREE_TYPE (newdecl) |
2384 | = TREE_TYPE (olddecl) | |
10bc1b1b | 2385 | = composite_type (newtype, oldtype); |
51e29401 | 2386 | |
3c6e6fbf | 2387 | /* Lay the type out, unless already done. */ |
2587f865 | 2388 | if (!comptypes (oldtype, TREE_TYPE (newdecl))) |
3c6e6fbf ZW |
2389 | { |
2390 | if (TREE_TYPE (newdecl) != error_mark_node) | |
2391 | layout_type (TREE_TYPE (newdecl)); | |
2392 | if (TREE_CODE (newdecl) != FUNCTION_DECL | |
2393 | && TREE_CODE (newdecl) != TYPE_DECL | |
2394 | && TREE_CODE (newdecl) != CONST_DECL) | |
2395 | layout_decl (newdecl, 0); | |
2396 | } | |
2397 | else | |
2398 | { | |
2399 | /* Since the type is OLDDECL's, make OLDDECL's size go with. */ | |
2400 | DECL_SIZE (newdecl) = DECL_SIZE (olddecl); | |
2401 | DECL_SIZE_UNIT (newdecl) = DECL_SIZE_UNIT (olddecl); | |
2402 | DECL_MODE (newdecl) = DECL_MODE (olddecl); | |
837edd5f GK |
2403 | if (DECL_ALIGN (olddecl) > DECL_ALIGN (newdecl)) |
2404 | { | |
2405 | DECL_ALIGN (newdecl) = DECL_ALIGN (olddecl); | |
8220334a | 2406 | DECL_USER_ALIGN (newdecl) |= DECL_USER_ALIGN (olddecl); |
837edd5f | 2407 | } |
3c6e6fbf | 2408 | } |
fc542d3c | 2409 | |
9a60b229 JJ |
2410 | /* Keep the old rtl since we can safely use it. */ |
2411 | if (HAS_RTL_P (olddecl)) | |
2412 | COPY_DECL_RTL (olddecl, newdecl); | |
17aec3eb | 2413 | |
3c6e6fbf ZW |
2414 | /* Merge the type qualifiers. */ |
2415 | if (TREE_READONLY (newdecl)) | |
1ef82ef2 | 2416 | TREE_READONLY (olddecl) = 1; |
facef326 | 2417 | |
3c6e6fbf | 2418 | if (TREE_THIS_VOLATILE (newdecl)) |
ee9f69b4 | 2419 | TREE_THIS_VOLATILE (olddecl) = 1; |
3c6e6fbf | 2420 | |
302a2cc5 JM |
2421 | /* Merge deprecatedness. */ |
2422 | if (TREE_DEPRECATED (newdecl)) | |
2423 | TREE_DEPRECATED (olddecl) = 1; | |
2424 | ||
238fe3c5 RAE |
2425 | /* If a decl is in a system header and the other isn't, keep the one on the |
2426 | system header. Otherwise, keep source location of definition rather than | |
2427 | declaration and of prototype rather than non-prototype unless that | |
2428 | prototype is built-in. */ | |
2429 | if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS) | |
2430 | && DECL_IN_SYSTEM_HEADER (olddecl) | |
2431 | && !DECL_IN_SYSTEM_HEADER (newdecl) ) | |
aa14403d | 2432 | DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl); |
238fe3c5 RAE |
2433 | else if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS) |
2434 | && DECL_IN_SYSTEM_HEADER (newdecl) | |
2435 | && !DECL_IN_SYSTEM_HEADER (olddecl)) | |
aa14403d | 2436 | DECL_SOURCE_LOCATION (olddecl) = DECL_SOURCE_LOCATION (newdecl); |
238fe3c5 RAE |
2437 | else if ((DECL_INITIAL (newdecl) == 0 && DECL_INITIAL (olddecl) != 0) |
2438 | || (old_is_prototype && !new_is_prototype | |
2439 | && !C_DECL_BUILTIN_PROTOTYPE (olddecl))) | |
3c6e6fbf ZW |
2440 | DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl); |
2441 | ||
3c6e6fbf | 2442 | /* Merge the initialization information. */ |
1ef82ef2 | 2443 | if (DECL_INITIAL (newdecl) == 0) |
3c6e6fbf ZW |
2444 | DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl); |
2445 | ||
953ff289 DN |
2446 | /* Merge the threadprivate attribute. */ |
2447 | if (TREE_CODE (olddecl) == VAR_DECL && C_DECL_THREADPRIVATE_P (olddecl)) | |
5fcffe51 | 2448 | C_DECL_THREADPRIVATE_P (newdecl) = 1; |
953ff289 | 2449 | |
fbbc17c7 MS |
2450 | if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS)) |
2451 | { | |
fbbc17c7 MS |
2452 | /* Copy the assembler name. |
2453 | Currently, it can only be defined in the prototype. */ | |
2454 | COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl); | |
2455 | ||
2456 | /* Use visibility of whichever declaration had it specified */ | |
2457 | if (DECL_VISIBILITY_SPECIFIED (olddecl)) | |
2458 | { | |
2459 | DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl); | |
2460 | DECL_VISIBILITY_SPECIFIED (newdecl) = 1; | |
2461 | } | |
2462 | ||
2463 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2464 | { | |
2465 | DECL_STATIC_CONSTRUCTOR(newdecl) |= DECL_STATIC_CONSTRUCTOR(olddecl); | |
2466 | DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl); | |
2467 | DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl); | |
2468 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl) | |
2469 | |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl); | |
2470 | TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl); | |
fbbc17c7 | 2471 | DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl); |
1ea193c2 | 2472 | DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl); |
becfd6e5 KZ |
2473 | TREE_READONLY (newdecl) |= TREE_READONLY (olddecl); |
2474 | DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl); | |
fbbc17c7 MS |
2475 | DECL_IS_NOVOPS (newdecl) |= DECL_IS_NOVOPS (olddecl); |
2476 | } | |
2477 | ||
2478 | /* Merge the storage class information. */ | |
2479 | merge_weak (newdecl, olddecl); | |
2480 | ||
2481 | /* For functions, static overrides non-static. */ | |
2482 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2483 | { | |
2484 | TREE_PUBLIC (newdecl) &= TREE_PUBLIC (olddecl); | |
2485 | /* This is since we don't automatically | |
2486 | copy the attributes of NEWDECL into OLDDECL. */ | |
2487 | TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl); | |
2488 | /* If this clears `static', clear it in the identifier too. */ | |
2489 | if (!TREE_PUBLIC (olddecl)) | |
2490 | TREE_PUBLIC (DECL_NAME (olddecl)) = 0; | |
2491 | } | |
2492 | } | |
2493 | ||
4eb7fd83 JJ |
2494 | /* In c99, 'extern' declaration before (or after) 'inline' means this |
2495 | function is not DECL_EXTERNAL, unless 'gnu_inline' attribute | |
2496 | is present. */ | |
2497 | if (TREE_CODE (newdecl) == FUNCTION_DECL | |
da1c7394 | 2498 | && !flag_gnu89_inline |
4eb7fd83 JJ |
2499 | && (DECL_DECLARED_INLINE_P (newdecl) |
2500 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2501 | && (!DECL_DECLARED_INLINE_P (newdecl) | |
2502 | || !DECL_DECLARED_INLINE_P (olddecl) | |
2503 | || !DECL_EXTERNAL (olddecl)) | |
2504 | && DECL_EXTERNAL (newdecl) | |
6cf59865 | 2505 | && !lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (newdecl)) |
74b0ec7c | 2506 | && !current_function_decl) |
4eb7fd83 | 2507 | DECL_EXTERNAL (newdecl) = 0; |
71113fcd | 2508 | |
6763b9f7 JM |
2509 | /* An inline definition following a static declaration is not |
2510 | DECL_EXTERNAL. */ | |
2511 | if (new_is_definition | |
2512 | && (DECL_DECLARED_INLINE_P (newdecl) | |
2513 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2514 | && !TREE_PUBLIC (olddecl)) | |
2515 | DECL_EXTERNAL (newdecl) = 0; | |
2516 | ||
fbbc17c7 MS |
2517 | if (DECL_EXTERNAL (newdecl)) |
2518 | { | |
2519 | TREE_STATIC (newdecl) = TREE_STATIC (olddecl); | |
2520 | DECL_EXTERNAL (newdecl) = DECL_EXTERNAL (olddecl); | |
2521 | ||
2522 | /* An extern decl does not override previous storage class. */ | |
2523 | TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl); | |
2524 | if (!DECL_EXTERNAL (newdecl)) | |
2525 | { | |
2526 | DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl); | |
2527 | DECL_COMMON (newdecl) = DECL_COMMON (olddecl); | |
2528 | } | |
2529 | } | |
2530 | else | |
2531 | { | |
2532 | TREE_STATIC (olddecl) = TREE_STATIC (newdecl); | |
2533 | TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl); | |
2534 | } | |
2535 | ||
2536 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2537 | { | |
2538 | /* If we're redefining a function previously defined as extern | |
2539 | inline, make sure we emit debug info for the inline before we | |
2540 | throw it away, in case it was inlined into a function that | |
2541 | hasn't been written out yet. */ | |
2542 | if (new_is_definition && DECL_INITIAL (olddecl)) | |
500b9ca1 JJ |
2543 | /* The new defn must not be inline. */ |
2544 | DECL_UNINLINABLE (newdecl) = 1; | |
fbbc17c7 MS |
2545 | else |
2546 | { | |
2547 | /* If either decl says `inline', this fn is inline, unless | |
2548 | its definition was passed already. */ | |
2549 | if (DECL_DECLARED_INLINE_P (newdecl) | |
2550 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2551 | DECL_DECLARED_INLINE_P (newdecl) = 1; | |
2552 | ||
2553 | DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl) | |
2554 | = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)); | |
c536a6a7 RG |
2555 | |
2556 | DECL_DISREGARD_INLINE_LIMITS (newdecl) | |
2557 | = DECL_DISREGARD_INLINE_LIMITS (olddecl) | |
2558 | = (DECL_DISREGARD_INLINE_LIMITS (newdecl) | |
2559 | || DECL_DISREGARD_INLINE_LIMITS (olddecl)); | |
fbbc17c7 MS |
2560 | } |
2561 | ||
2562 | if (DECL_BUILT_IN (olddecl)) | |
2563 | { | |
2564 | /* If redeclaring a builtin function, it stays built in. | |
2565 | But it gets tagged as having been declared. */ | |
2566 | DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl); | |
2567 | DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl); | |
2568 | C_DECL_DECLARED_BUILTIN (newdecl) = 1; | |
2569 | if (new_is_prototype) | |
8b57bfeb JJ |
2570 | { |
2571 | C_DECL_BUILTIN_PROTOTYPE (newdecl) = 0; | |
2572 | if (DECL_BUILT_IN_CLASS (newdecl) == BUILT_IN_NORMAL) | |
e79983f4 MM |
2573 | { |
2574 | enum built_in_function fncode = DECL_FUNCTION_CODE (newdecl); | |
2575 | switch (fncode) | |
2576 | { | |
2577 | /* If a compatible prototype of these builtin functions | |
2578 | is seen, assume the runtime implements it with the | |
2579 | expected semantics. */ | |
2580 | case BUILT_IN_STPCPY: | |
2581 | if (builtin_decl_explicit_p (fncode)) | |
2582 | set_builtin_decl_implicit_p (fncode, true); | |
2583 | break; | |
2584 | default: | |
2585 | break; | |
2586 | } | |
2587 | } | |
8b57bfeb | 2588 | } |
fbbc17c7 MS |
2589 | else |
2590 | C_DECL_BUILTIN_PROTOTYPE (newdecl) | |
2591 | = C_DECL_BUILTIN_PROTOTYPE (olddecl); | |
2592 | } | |
2593 | ||
ab442df7 MM |
2594 | /* Preserve function specific target and optimization options */ |
2595 | if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl) | |
2596 | && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl)) | |
2597 | DECL_FUNCTION_SPECIFIC_TARGET (newdecl) | |
2598 | = DECL_FUNCTION_SPECIFIC_TARGET (olddecl); | |
2599 | ||
2600 | if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl) | |
2601 | && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)) | |
2602 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl) | |
2603 | = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl); | |
2604 | ||
fbbc17c7 MS |
2605 | /* Also preserve various other info from the definition. */ |
2606 | if (!new_is_definition) | |
2607 | { | |
dcb6e951 | 2608 | tree t; |
fbbc17c7 MS |
2609 | DECL_RESULT (newdecl) = DECL_RESULT (olddecl); |
2610 | DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl); | |
2611 | DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl); | |
2612 | DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl); | |
dcb6e951 | 2613 | DECL_ARGUMENTS (newdecl) = copy_list (DECL_ARGUMENTS (olddecl)); |
910ad8de | 2614 | for (t = DECL_ARGUMENTS (newdecl); t ; t = DECL_CHAIN (t)) |
dcb6e951 | 2615 | DECL_CONTEXT (t) = newdecl; |
fbbc17c7 | 2616 | |
54dfd46b JH |
2617 | /* See if we've got a function to instantiate from. */ |
2618 | if (DECL_SAVED_TREE (olddecl)) | |
2619 | DECL_ABSTRACT_ORIGIN (newdecl) | |
2620 | = DECL_ABSTRACT_ORIGIN (olddecl); | |
fbbc17c7 MS |
2621 | } |
2622 | } | |
2623 | ||
a35120a3 L |
2624 | /* Merge the USED information. */ |
2625 | if (TREE_USED (olddecl)) | |
2626 | TREE_USED (newdecl) = 1; | |
2627 | else if (TREE_USED (newdecl)) | |
2628 | TREE_USED (olddecl) = 1; | |
ebfbbdc5 JJ |
2629 | if (TREE_CODE (olddecl) == VAR_DECL || TREE_CODE (olddecl) == PARM_DECL) |
2630 | DECL_READ_P (newdecl) |= DECL_READ_P (olddecl); | |
c387e067 MS |
2631 | if (DECL_PRESERVE_P (olddecl)) |
2632 | DECL_PRESERVE_P (newdecl) = 1; | |
2633 | else if (DECL_PRESERVE_P (newdecl)) | |
2634 | DECL_PRESERVE_P (olddecl) = 1; | |
e27fb29c | 2635 | |
fbbc17c7 | 2636 | /* Copy most of the decl-specific fields of NEWDECL into OLDDECL. |
f9417da1 RG |
2637 | But preserve OLDDECL's DECL_UID, DECL_CONTEXT and |
2638 | DECL_ARGUMENTS (if appropriate). */ | |
850cba29 | 2639 | { |
b3694847 | 2640 | unsigned olddecl_uid = DECL_UID (olddecl); |
9affb2c7 | 2641 | tree olddecl_context = DECL_CONTEXT (olddecl); |
dcb6e951 RAE |
2642 | tree olddecl_arguments = NULL; |
2643 | if (TREE_CODE (olddecl) == FUNCTION_DECL) | |
2644 | olddecl_arguments = DECL_ARGUMENTS (olddecl); | |
c22cacf3 | 2645 | |
da61dec9 JM |
2646 | memcpy ((char *) olddecl + sizeof (struct tree_common), |
2647 | (char *) newdecl + sizeof (struct tree_common), | |
820cc88f | 2648 | sizeof (struct tree_decl_common) - sizeof (struct tree_common)); |
45f41865 | 2649 | DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl); |
820cc88f DB |
2650 | switch (TREE_CODE (olddecl)) |
2651 | { | |
726a989a | 2652 | case FUNCTION_DECL: |
820cc88f | 2653 | case VAR_DECL: |
aede2c10 JH |
2654 | { |
2655 | struct symtab_node *snode = olddecl->decl_with_vis.symtab_node; | |
2656 | ||
2657 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), | |
2658 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2659 | tree_code_size (TREE_CODE (olddecl)) - sizeof (struct tree_decl_common)); | |
2660 | olddecl->decl_with_vis.symtab_node = snode; | |
5fcffe51 MT |
2661 | |
2662 | if ((DECL_EXTERNAL (olddecl) | |
2663 | || TREE_PUBLIC (olddecl) | |
2664 | || TREE_STATIC (olddecl)) | |
2665 | && DECL_SECTION_NAME (newdecl) != NULL) | |
2666 | set_decl_section_name (olddecl, DECL_SECTION_NAME (newdecl)); | |
2667 | ||
2668 | /* This isn't quite correct for something like | |
2669 | int __thread x attribute ((tls_model ("local-exec"))); | |
2670 | extern int __thread x; | |
2671 | as we'll lose the "local-exec" model. */ | |
2672 | if (TREE_CODE (olddecl) == VAR_DECL | |
2673 | && DECL_THREAD_LOCAL_P (newdecl)) | |
2674 | set_decl_tls_model (olddecl, DECL_TLS_MODEL (newdecl)); | |
aede2c10 JH |
2675 | break; |
2676 | } | |
2677 | ||
2678 | case FIELD_DECL: | |
820cc88f DB |
2679 | case PARM_DECL: |
2680 | case LABEL_DECL: | |
2681 | case RESULT_DECL: | |
2682 | case CONST_DECL: | |
2683 | case TYPE_DECL: | |
820cc88f DB |
2684 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), |
2685 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2686 | tree_code_size (TREE_CODE (olddecl)) - sizeof (struct tree_decl_common)); | |
2687 | break; | |
2688 | ||
2689 | default: | |
c22cacf3 | 2690 | |
820cc88f DB |
2691 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), |
2692 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2693 | sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)); | |
2694 | } | |
850cba29 | 2695 | DECL_UID (olddecl) = olddecl_uid; |
9affb2c7 | 2696 | DECL_CONTEXT (olddecl) = olddecl_context; |
dcb6e951 RAE |
2697 | if (TREE_CODE (olddecl) == FUNCTION_DECL) |
2698 | DECL_ARGUMENTS (olddecl) = olddecl_arguments; | |
850cba29 | 2699 | } |
51e29401 | 2700 | |
2306d91c RH |
2701 | /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl |
2702 | so that encode_section_info has a chance to look at the new decl | |
2703 | flags and attributes. */ | |
2704 | if (DECL_RTL_SET_P (olddecl) | |
2705 | && (TREE_CODE (olddecl) == FUNCTION_DECL | |
2706 | || (TREE_CODE (olddecl) == VAR_DECL | |
2707 | && TREE_STATIC (olddecl)))) | |
0e6df31e | 2708 | make_decl_rtl (olddecl); |
51e29401 RS |
2709 | } |
2710 | ||
3c6e6fbf ZW |
2711 | /* Handle when a new declaration NEWDECL has the same name as an old |
2712 | one OLDDECL in the same binding contour. Prints an error message | |
2713 | if appropriate. | |
2714 | ||
2715 | If safely possible, alter OLDDECL to look like NEWDECL, and return | |
1ef82ef2 | 2716 | true. Otherwise, return false. */ |
3c6e6fbf ZW |
2717 | |
2718 | static bool | |
1ef82ef2 | 2719 | duplicate_decls (tree newdecl, tree olddecl) |
3c6e6fbf | 2720 | { |
6de9cd9a | 2721 | tree newtype = NULL, oldtype = NULL; |
3c6e6fbf ZW |
2722 | |
2723 | if (!diagnose_mismatched_decls (newdecl, olddecl, &newtype, &oldtype)) | |
f95f80d1 | 2724 | { |
f9837879 | 2725 | /* Avoid `unused variable' and other warnings for OLDDECL. */ |
f95f80d1 SB |
2726 | TREE_NO_WARNING (olddecl) = 1; |
2727 | return false; | |
2728 | } | |
3c6e6fbf | 2729 | |
1ef82ef2 | 2730 | merge_decls (newdecl, olddecl, newtype, oldtype); |
aede2c10 | 2731 | |
22e1cf1c JH |
2732 | /* The NEWDECL will no longer be needed. |
2733 | ||
2734 | Before releasing the node, be sure to remove function from symbol | |
2735 | table that might have been inserted there to record comdat group. | |
2736 | Be sure to however do not free DECL_STRUCT_FUNCTION because this | |
2737 | structure is shared in between NEWDECL and OLDECL. */ | |
2738 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2739 | DECL_STRUCT_FUNCTION (newdecl) = NULL; | |
24d047a3 JH |
2740 | if (TREE_CODE (newdecl) == FUNCTION_DECL |
2741 | || TREE_CODE (newdecl) == VAR_DECL) | |
2742 | { | |
d52f5295 | 2743 | struct symtab_node *snode = symtab_node::get (newdecl); |
24d047a3 | 2744 | if (snode) |
d52f5295 | 2745 | snode->remove (); |
24d047a3 | 2746 | } |
aede2c10 | 2747 | ggc_free (newdecl); |
1ef82ef2 | 2748 | return true; |
3c6e6fbf | 2749 | } |
118a3a8b | 2750 | |
3c6e6fbf | 2751 | \f |
1ad463f4 | 2752 | /* Check whether decl-node NEW_DECL shadows an existing declaration. */ |
339a28b9 | 2753 | static void |
1ad463f4 | 2754 | warn_if_shadowing (tree new_decl) |
339a28b9 | 2755 | { |
f75fbaf7 | 2756 | struct c_binding *b; |
339a28b9 | 2757 | |
f75fbaf7 ZW |
2758 | /* Shadow warnings wanted? */ |
2759 | if (!warn_shadow | |
339a28b9 | 2760 | /* No shadow warnings for internally generated vars. */ |
1ad463f4 | 2761 | || DECL_IS_BUILTIN (new_decl) |
339a28b9 | 2762 | /* No shadow warnings for vars made for inlining. */ |
7c47d6e9 | 2763 | || DECL_FROM_INLINE (new_decl)) |
26f943fd NB |
2764 | return; |
2765 | ||
9aaabf8a | 2766 | /* Is anything being shadowed? Invisible decls do not count. */ |
1ad463f4 | 2767 | for (b = I_SYMBOL_BINDING (DECL_NAME (new_decl)); b; b = b->shadowed) |
1d551e4d AM |
2768 | if (b->decl && b->decl != new_decl && !b->invisible |
2769 | && (b->decl == error_mark_node | |
2770 | || diagnostic_report_warnings_p (global_dc, | |
2771 | DECL_SOURCE_LOCATION (b->decl)))) | |
f75fbaf7 | 2772 | { |
1ad463f4 | 2773 | tree old_decl = b->decl; |
6447c55d | 2774 | bool warned = false; |
f75fbaf7 | 2775 | |
d8dd2f3a JJ |
2776 | if (old_decl == error_mark_node) |
2777 | { | |
b9b8dde3 DD |
2778 | warning (OPT_Wshadow, "declaration of %q+D shadows previous " |
2779 | "non-variable", new_decl); | |
d8dd2f3a JJ |
2780 | break; |
2781 | } | |
2782 | else if (TREE_CODE (old_decl) == PARM_DECL) | |
6447c55d MP |
2783 | warned = warning (OPT_Wshadow, |
2784 | "declaration of %q+D shadows a parameter", | |
2785 | new_decl); | |
b9b8dde3 | 2786 | else if (DECL_FILE_SCOPE_P (old_decl)) |
077d1abe MLI |
2787 | { |
2788 | /* Do not warn if a variable shadows a function, unless | |
2789 | the variable is a function or a pointer-to-function. */ | |
2790 | if (TREE_CODE (old_decl) == FUNCTION_DECL | |
2791 | && TREE_CODE (new_decl) != FUNCTION_DECL | |
2792 | && !FUNCTION_POINTER_TYPE_P (TREE_TYPE (new_decl))) | |
2793 | continue; | |
2794 | ||
6447c55d MP |
2795 | warned = warning_at (DECL_SOURCE_LOCATION (new_decl), OPT_Wshadow, |
2796 | "declaration of %qD shadows a global " | |
2797 | "declaration", | |
2798 | new_decl); | |
077d1abe | 2799 | } |
1ad463f4 BI |
2800 | else if (TREE_CODE (old_decl) == FUNCTION_DECL |
2801 | && DECL_BUILT_IN (old_decl)) | |
d8dd2f3a | 2802 | { |
b9b8dde3 DD |
2803 | warning (OPT_Wshadow, "declaration of %q+D shadows " |
2804 | "a built-in function", new_decl); | |
d8dd2f3a JJ |
2805 | break; |
2806 | } | |
f75fbaf7 | 2807 | else |
6447c55d MP |
2808 | warned = warning (OPT_Wshadow, "declaration of %q+D shadows a " |
2809 | "previous local", new_decl); | |
f75fbaf7 | 2810 | |
6447c55d MP |
2811 | if (warned) |
2812 | inform (DECL_SOURCE_LOCATION (old_decl), | |
2813 | "shadowed declaration is here"); | |
a6f78652 | 2814 | |
f75fbaf7 ZW |
2815 | break; |
2816 | } | |
339a28b9 ZW |
2817 | } |
2818 | ||
51e29401 RS |
2819 | /* Record a decl-node X as belonging to the current lexical scope. |
2820 | Check for errors (such as an incompatible declaration for the same | |
2821 | name already seen in the same scope). | |
2822 | ||
2823 | Returns either X or an old decl for the same name. | |
2824 | If an old decl is returned, it may have been smashed | |
2825 | to agree with what X says. */ | |
2826 | ||
2827 | tree | |
35b1a6fa | 2828 | pushdecl (tree x) |
51e29401 | 2829 | { |
b3694847 | 2830 | tree name = DECL_NAME (x); |
f8521984 | 2831 | struct c_scope *scope = current_scope; |
f75fbaf7 | 2832 | struct c_binding *b; |
9aaabf8a | 2833 | bool nested = false; |
b3f27c15 | 2834 | location_t locus = DECL_SOURCE_LOCATION (x); |
51e29401 | 2835 | |
eecec698 ZW |
2836 | /* Must set DECL_CONTEXT for everything not at file scope or |
2837 | DECL_FILE_SCOPE_P won't work. Local externs don't count | |
2838 | unless they have initializers (which generate code). */ | |
2839 | if (current_function_decl | |
2840 | && ((TREE_CODE (x) != FUNCTION_DECL && TREE_CODE (x) != VAR_DECL) | |
2841 | || DECL_INITIAL (x) || !DECL_EXTERNAL (x))) | |
339a28b9 | 2842 | DECL_CONTEXT (x) = current_function_decl; |
e13e48e7 | 2843 | |
f75fbaf7 ZW |
2844 | /* Anonymous decls are just inserted in the scope. */ |
2845 | if (!name) | |
51e29401 | 2846 | { |
b3f27c15 JJ |
2847 | bind (name, x, scope, /*invisible=*/false, /*nested=*/false, |
2848 | locus); | |
f75fbaf7 ZW |
2849 | return x; |
2850 | } | |
2851 | ||
2852 | /* First, see if there is another declaration with the same name in | |
2853 | the current scope. If there is, duplicate_decls may do all the | |
2854 | work for us. If duplicate_decls returns false, that indicates | |
2855 | two incompatible decls in the same scope; we are to silently | |
2856 | replace the old one (duplicate_decls has issued all appropriate | |
2857 | diagnostics). In particular, we should not consider possible | |
2858 | duplicates in the external scope, or shadowing. */ | |
2859 | b = I_SYMBOL_BINDING (name); | |
9aaabf8a | 2860 | if (b && B_IN_SCOPE (b, scope)) |
f75fbaf7 | 2861 | { |
2798c11f JM |
2862 | struct c_binding *b_ext, *b_use; |
2863 | tree type = TREE_TYPE (x); | |
2864 | tree visdecl = b->decl; | |
2865 | tree vistype = TREE_TYPE (visdecl); | |
0b410f0b JM |
2866 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE |
2867 | && COMPLETE_TYPE_P (TREE_TYPE (x))) | |
2868 | b->inner_comp = false; | |
2798c11f JM |
2869 | b_use = b; |
2870 | b_ext = b; | |
2871 | /* If this is an external linkage declaration, we should check | |
2872 | for compatibility with the type in the external scope before | |
2873 | setting the type at this scope based on the visible | |
2874 | information only. */ | |
2875 | if (TREE_PUBLIC (x) && TREE_PUBLIC (visdecl)) | |
2876 | { | |
2877 | while (b_ext && !B_IN_EXTERNAL_SCOPE (b_ext)) | |
2878 | b_ext = b_ext->shadowed; | |
2879 | if (b_ext) | |
2880 | { | |
2881 | b_use = b_ext; | |
e1b7793c ILT |
2882 | if (b_use->u.type) |
2883 | TREE_TYPE (b_use->decl) = b_use->u.type; | |
2798c11f JM |
2884 | } |
2885 | } | |
2886 | if (duplicate_decls (x, b_use->decl)) | |
2887 | { | |
2888 | if (b_use != b) | |
2889 | { | |
2890 | /* Save the updated type in the external scope and | |
2891 | restore the proper type for this scope. */ | |
2892 | tree thistype; | |
2893 | if (comptypes (vistype, type)) | |
2894 | thistype = composite_type (vistype, type); | |
2895 | else | |
2896 | thistype = TREE_TYPE (b_use->decl); | |
e1b7793c | 2897 | b_use->u.type = TREE_TYPE (b_use->decl); |
2798c11f JM |
2898 | if (TREE_CODE (b_use->decl) == FUNCTION_DECL |
2899 | && DECL_BUILT_IN (b_use->decl)) | |
2900 | thistype | |
2901 | = build_type_attribute_variant (thistype, | |
2902 | TYPE_ATTRIBUTES | |
e1b7793c | 2903 | (b_use->u.type)); |
2798c11f JM |
2904 | TREE_TYPE (b_use->decl) = thistype; |
2905 | } | |
2906 | return b_use->decl; | |
2907 | } | |
f75fbaf7 ZW |
2908 | else |
2909 | goto skip_external_and_shadow_checks; | |
2910 | } | |
2911 | ||
2912 | /* All declarations with external linkage, and all external | |
2913 | references, go in the external scope, no matter what scope is | |
2914 | current. However, the binding in that scope is ignored for | |
2915 | purposes of normal name lookup. A separate binding structure is | |
2916 | created in the requested scope; this governs the normal | |
2917 | visibility of the symbol. | |
51e29401 | 2918 | |
f75fbaf7 ZW |
2919 | The binding in the externals scope is used exclusively for |
2920 | detecting duplicate declarations of the same object, no matter | |
2921 | what scope they are in; this is what we do here. (C99 6.2.7p2: | |
2922 | All declarations that refer to the same object or function shall | |
2923 | have compatible type; otherwise, the behavior is undefined.) */ | |
2924 | if (DECL_EXTERNAL (x) || scope == file_scope) | |
2925 | { | |
0b410f0b JM |
2926 | tree type = TREE_TYPE (x); |
2927 | tree vistype = 0; | |
2928 | tree visdecl = 0; | |
2929 | bool type_saved = false; | |
2930 | if (b && !B_IN_EXTERNAL_SCOPE (b) | |
2931 | && (TREE_CODE (b->decl) == FUNCTION_DECL | |
2932 | || TREE_CODE (b->decl) == VAR_DECL) | |
2933 | && DECL_FILE_SCOPE_P (b->decl)) | |
2934 | { | |
2935 | visdecl = b->decl; | |
2936 | vistype = TREE_TYPE (visdecl); | |
2937 | } | |
3176a0c2 | 2938 | if (scope != file_scope |
234f46ae | 2939 | && !DECL_IN_SYSTEM_HEADER (x)) |
3176a0c2 | 2940 | warning (OPT_Wnested_externs, "nested extern declaration of %qD", x); |
234f46ae | 2941 | |
9aaabf8a | 2942 | while (b && !B_IN_EXTERNAL_SCOPE (b)) |
0b410f0b JM |
2943 | { |
2944 | /* If this decl might be modified, save its type. This is | |
2945 | done here rather than when the decl is first bound | |
2946 | because the type may change after first binding, through | |
2947 | being completed or through attributes being added. If we | |
2948 | encounter multiple such decls, only the first should have | |
2949 | its type saved; the others will already have had their | |
2950 | proper types saved and the types will not have changed as | |
2951 | their scopes will not have been re-entered. */ | |
d8dd2f3a | 2952 | if (DECL_P (b->decl) && DECL_FILE_SCOPE_P (b->decl) && !type_saved) |
0b410f0b | 2953 | { |
e1b7793c | 2954 | b->u.type = TREE_TYPE (b->decl); |
0b410f0b JM |
2955 | type_saved = true; |
2956 | } | |
2957 | if (B_IN_FILE_SCOPE (b) | |
2958 | && TREE_CODE (b->decl) == VAR_DECL | |
2959 | && TREE_STATIC (b->decl) | |
2960 | && TREE_CODE (TREE_TYPE (b->decl)) == ARRAY_TYPE | |
2961 | && !TYPE_DOMAIN (TREE_TYPE (b->decl)) | |
2962 | && TREE_CODE (type) == ARRAY_TYPE | |
2963 | && TYPE_DOMAIN (type) | |
2964 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) | |
2965 | && !integer_zerop (TYPE_MAX_VALUE (TYPE_DOMAIN (type)))) | |
2966 | { | |
2967 | /* Array type completed in inner scope, which should be | |
2968 | diagnosed if the completion does not have size 1 and | |
2969 | it does not get completed in the file scope. */ | |
2970 | b->inner_comp = true; | |
2971 | } | |
2972 | b = b->shadowed; | |
2973 | } | |
2974 | ||
2975 | /* If a matching external declaration has been found, set its | |
2976 | type to the composite of all the types of that declaration. | |
2977 | After the consistency checks, it will be reset to the | |
2978 | composite of the visible types only. */ | |
2979 | if (b && (TREE_PUBLIC (x) || same_translation_unit_p (x, b->decl)) | |
e1b7793c ILT |
2980 | && b->u.type) |
2981 | TREE_TYPE (b->decl) = b->u.type; | |
f75fbaf7 ZW |
2982 | |
2983 | /* The point of the same_translation_unit_p check here is, | |
2984 | we want to detect a duplicate decl for a construct like | |
2985 | foo() { extern bar(); } ... static bar(); but not if | |
2986 | they are in different translation units. In any case, | |
2987 | the static does not go in the externals scope. */ | |
2988 | if (b | |
9affb2c7 | 2989 | && (TREE_PUBLIC (x) || same_translation_unit_p (x, b->decl)) |
f75fbaf7 | 2990 | && duplicate_decls (x, b->decl)) |
55d54003 | 2991 | { |
0b410f0b | 2992 | tree thistype; |
2798c11f JM |
2993 | if (vistype) |
2994 | { | |
2995 | if (comptypes (vistype, type)) | |
2996 | thistype = composite_type (vistype, type); | |
2997 | else | |
2998 | thistype = TREE_TYPE (b->decl); | |
2999 | } | |
3000 | else | |
3001 | thistype = type; | |
e1b7793c | 3002 | b->u.type = TREE_TYPE (b->decl); |
0b410f0b JM |
3003 | if (TREE_CODE (b->decl) == FUNCTION_DECL && DECL_BUILT_IN (b->decl)) |
3004 | thistype | |
3005 | = build_type_attribute_variant (thistype, | |
e1b7793c | 3006 | TYPE_ATTRIBUTES (b->u.type)); |
0b410f0b | 3007 | TREE_TYPE (b->decl) = thistype; |
b3f27c15 JJ |
3008 | bind (name, b->decl, scope, /*invisible=*/false, /*nested=*/true, |
3009 | locus); | |
f75fbaf7 | 3010 | return b->decl; |
55d54003 | 3011 | } |
9affb2c7 | 3012 | else if (TREE_PUBLIC (x)) |
6645c3fa | 3013 | { |
0b410f0b JM |
3014 | if (visdecl && !b && duplicate_decls (x, visdecl)) |
3015 | { | |
3016 | /* An external declaration at block scope referring to a | |
3017 | visible entity with internal linkage. The composite | |
3018 | type will already be correct for this scope, so we | |
3019 | just need to fall through to make the declaration in | |
3020 | this scope. */ | |
3021 | nested = true; | |
1b36c818 | 3022 | x = visdecl; |
0b410f0b JM |
3023 | } |
3024 | else | |
3025 | { | |
3026 | bind (name, x, external_scope, /*invisible=*/true, | |
b3f27c15 | 3027 | /*nested=*/false, locus); |
0b410f0b JM |
3028 | nested = true; |
3029 | } | |
51e29401 | 3030 | } |
f75fbaf7 | 3031 | } |
35b1a6fa | 3032 | |
7c47d6e9 JM |
3033 | if (TREE_CODE (x) != PARM_DECL) |
3034 | warn_if_shadowing (x); | |
51e29401 | 3035 | |
f75fbaf7 ZW |
3036 | skip_external_and_shadow_checks: |
3037 | if (TREE_CODE (x) == TYPE_DECL) | |
3797cb21 DS |
3038 | { |
3039 | /* So this is a typedef, set its underlying type. */ | |
3040 | set_underlying_type (x); | |
3041 | ||
3042 | /* If X is a typedef defined in the current function, record it | |
3043 | for the purpose of implementing the -Wunused-local-typedefs | |
3044 | warning. */ | |
3045 | record_locally_defined_typedef (x); | |
3046 | } | |
51e29401 | 3047 | |
b3f27c15 | 3048 | bind (name, x, scope, /*invisible=*/false, nested, locus); |
f75fbaf7 ZW |
3049 | |
3050 | /* If x's type is incomplete because it's based on a | |
3051 | structure or union which has not yet been fully declared, | |
3052 | attach it to that structure or union type, so we can go | |
3053 | back and complete the variable declaration later, if the | |
3054 | structure or union gets fully declared. | |
51e29401 | 3055 | |
f75fbaf7 ZW |
3056 | If the input is erroneous, we can have error_mark in the type |
3057 | slot (e.g. "f(void a, ...)") - that doesn't count as an | |
3058 | incomplete type. */ | |
3059 | if (TREE_TYPE (x) != error_mark_node | |
3060 | && !COMPLETE_TYPE_P (TREE_TYPE (x))) | |
3061 | { | |
3062 | tree element = TREE_TYPE (x); | |
3063 | ||
3064 | while (TREE_CODE (element) == ARRAY_TYPE) | |
3065 | element = TREE_TYPE (element); | |
3066 | element = TYPE_MAIN_VARIANT (element); | |
3067 | ||
3068 | if ((TREE_CODE (element) == RECORD_TYPE | |
3069 | || TREE_CODE (element) == UNION_TYPE) | |
3070 | && (TREE_CODE (x) != TYPE_DECL | |
3071 | || TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE) | |
3072 | && !COMPLETE_TYPE_P (element)) | |
3073 | C_TYPE_INCOMPLETE_VARS (element) | |
3074 | = tree_cons (NULL_TREE, x, C_TYPE_INCOMPLETE_VARS (element)); | |
3075 | } | |
51e29401 RS |
3076 | return x; |
3077 | } | |
3078 | ||
f75fbaf7 | 3079 | /* Record X as belonging to file scope. |
6356f892 | 3080 | This is used only internally by the Objective-C front end, |
f91f41b2 ZW |
3081 | and is limited to its needs. duplicate_decls is not called; |
3082 | if there is any preexisting decl for this identifier, it is an ICE. */ | |
3083 | ||
339a28b9 | 3084 | tree |
35b1a6fa | 3085 | pushdecl_top_level (tree x) |
6970c06a | 3086 | { |
f91f41b2 | 3087 | tree name; |
9aaabf8a | 3088 | bool nested = false; |
943db347 | 3089 | gcc_assert (TREE_CODE (x) == VAR_DECL || TREE_CODE (x) == CONST_DECL); |
339a28b9 ZW |
3090 | |
3091 | name = DECL_NAME (x); | |
339a28b9 | 3092 | |
943db347 | 3093 | gcc_assert (TREE_CODE (x) == CONST_DECL || !I_SYMBOL_BINDING (name)); |
6970c06a | 3094 | |
9affb2c7 | 3095 | if (TREE_PUBLIC (x)) |
f75fbaf7 | 3096 | { |
b3f27c15 JJ |
3097 | bind (name, x, external_scope, /*invisible=*/true, /*nested=*/false, |
3098 | UNKNOWN_LOCATION); | |
9aaabf8a | 3099 | nested = true; |
f75fbaf7 ZW |
3100 | } |
3101 | if (file_scope) | |
b3f27c15 | 3102 | bind (name, x, file_scope, /*invisible=*/false, nested, UNKNOWN_LOCATION); |
51e29401 | 3103 | |
f91f41b2 | 3104 | return x; |
51e29401 RS |
3105 | } |
3106 | \f | |
f75fbaf7 | 3107 | static void |
30281de2 | 3108 | implicit_decl_warning (location_t loc, tree id, tree olddecl) |
f75fbaf7 | 3109 | { |
dc90f45b | 3110 | if (warn_implicit_function_declaration) |
f75fbaf7 | 3111 | { |
71205d17 MLI |
3112 | bool warned; |
3113 | ||
dc90f45b | 3114 | if (flag_isoc99) |
30281de2 | 3115 | warned = pedwarn (loc, OPT_Wimplicit_function_declaration, |
509c9d60 | 3116 | "implicit declaration of function %qE", id); |
b8698a0f | 3117 | else |
30281de2 MP |
3118 | warned = warning_at (loc, OPT_Wimplicit_function_declaration, |
3119 | G_("implicit declaration of function %qE"), id); | |
71205d17 MLI |
3120 | if (olddecl && warned) |
3121 | locate_old_decl (olddecl); | |
f75fbaf7 | 3122 | } |
f75fbaf7 ZW |
3123 | } |
3124 | ||
0382aaa0 MP |
3125 | /* This function represents mapping of a function code FCODE |
3126 | to its respective header. */ | |
3127 | ||
3128 | static const char * | |
3129 | header_for_builtin_fn (enum built_in_function fcode) | |
3130 | { | |
3131 | switch (fcode) | |
3132 | { | |
3133 | CASE_FLT_FN (BUILT_IN_ACOS): | |
3134 | CASE_FLT_FN (BUILT_IN_ACOSH): | |
3135 | CASE_FLT_FN (BUILT_IN_ASIN): | |
3136 | CASE_FLT_FN (BUILT_IN_ASINH): | |
3137 | CASE_FLT_FN (BUILT_IN_ATAN): | |
3138 | CASE_FLT_FN (BUILT_IN_ATANH): | |
3139 | CASE_FLT_FN (BUILT_IN_ATAN2): | |
3140 | CASE_FLT_FN (BUILT_IN_CBRT): | |
3141 | CASE_FLT_FN (BUILT_IN_CEIL): | |
3142 | CASE_FLT_FN (BUILT_IN_COPYSIGN): | |
3143 | CASE_FLT_FN (BUILT_IN_COS): | |
3144 | CASE_FLT_FN (BUILT_IN_COSH): | |
3145 | CASE_FLT_FN (BUILT_IN_ERF): | |
3146 | CASE_FLT_FN (BUILT_IN_ERFC): | |
3147 | CASE_FLT_FN (BUILT_IN_EXP): | |
3148 | CASE_FLT_FN (BUILT_IN_EXP2): | |
3149 | CASE_FLT_FN (BUILT_IN_EXPM1): | |
3150 | CASE_FLT_FN (BUILT_IN_FABS): | |
3151 | CASE_FLT_FN (BUILT_IN_FDIM): | |
3152 | CASE_FLT_FN (BUILT_IN_FLOOR): | |
3153 | CASE_FLT_FN (BUILT_IN_FMA): | |
3154 | CASE_FLT_FN (BUILT_IN_FMAX): | |
3155 | CASE_FLT_FN (BUILT_IN_FMIN): | |
3156 | CASE_FLT_FN (BUILT_IN_FMOD): | |
3157 | CASE_FLT_FN (BUILT_IN_FREXP): | |
3158 | CASE_FLT_FN (BUILT_IN_HYPOT): | |
3159 | CASE_FLT_FN (BUILT_IN_ILOGB): | |
3160 | CASE_FLT_FN (BUILT_IN_LDEXP): | |
3161 | CASE_FLT_FN (BUILT_IN_LGAMMA): | |
3162 | CASE_FLT_FN (BUILT_IN_LLRINT): | |
3163 | CASE_FLT_FN (BUILT_IN_LLROUND): | |
3164 | CASE_FLT_FN (BUILT_IN_LOG): | |
3165 | CASE_FLT_FN (BUILT_IN_LOG10): | |
3166 | CASE_FLT_FN (BUILT_IN_LOG1P): | |
3167 | CASE_FLT_FN (BUILT_IN_LOG2): | |
3168 | CASE_FLT_FN (BUILT_IN_LOGB): | |
3169 | CASE_FLT_FN (BUILT_IN_LRINT): | |
3170 | CASE_FLT_FN (BUILT_IN_LROUND): | |
3171 | CASE_FLT_FN (BUILT_IN_MODF): | |
3172 | CASE_FLT_FN (BUILT_IN_NAN): | |
3173 | CASE_FLT_FN (BUILT_IN_NEARBYINT): | |
3174 | CASE_FLT_FN (BUILT_IN_NEXTAFTER): | |
3175 | CASE_FLT_FN (BUILT_IN_NEXTTOWARD): | |
3176 | CASE_FLT_FN (BUILT_IN_POW): | |
3177 | CASE_FLT_FN (BUILT_IN_REMAINDER): | |
3178 | CASE_FLT_FN (BUILT_IN_REMQUO): | |
3179 | CASE_FLT_FN (BUILT_IN_RINT): | |
3180 | CASE_FLT_FN (BUILT_IN_ROUND): | |
3181 | CASE_FLT_FN (BUILT_IN_SCALBLN): | |
3182 | CASE_FLT_FN (BUILT_IN_SCALBN): | |
3183 | CASE_FLT_FN (BUILT_IN_SIN): | |
3184 | CASE_FLT_FN (BUILT_IN_SINH): | |
3185 | CASE_FLT_FN (BUILT_IN_SINCOS): | |
3186 | CASE_FLT_FN (BUILT_IN_SQRT): | |
3187 | CASE_FLT_FN (BUILT_IN_TAN): | |
3188 | CASE_FLT_FN (BUILT_IN_TANH): | |
3189 | CASE_FLT_FN (BUILT_IN_TGAMMA): | |
3190 | CASE_FLT_FN (BUILT_IN_TRUNC): | |
3191 | case BUILT_IN_ISINF: | |
3192 | case BUILT_IN_ISNAN: | |
3193 | return "<math.h>"; | |
3194 | CASE_FLT_FN (BUILT_IN_CABS): | |
3195 | CASE_FLT_FN (BUILT_IN_CACOS): | |
3196 | CASE_FLT_FN (BUILT_IN_CACOSH): | |
3197 | CASE_FLT_FN (BUILT_IN_CARG): | |
3198 | CASE_FLT_FN (BUILT_IN_CASIN): | |
3199 | CASE_FLT_FN (BUILT_IN_CASINH): | |
3200 | CASE_FLT_FN (BUILT_IN_CATAN): | |
3201 | CASE_FLT_FN (BUILT_IN_CATANH): | |
3202 | CASE_FLT_FN (BUILT_IN_CCOS): | |
3203 | CASE_FLT_FN (BUILT_IN_CCOSH): | |
3204 | CASE_FLT_FN (BUILT_IN_CEXP): | |
3205 | CASE_FLT_FN (BUILT_IN_CIMAG): | |
3206 | CASE_FLT_FN (BUILT_IN_CLOG): | |
3207 | CASE_FLT_FN (BUILT_IN_CONJ): | |
3208 | CASE_FLT_FN (BUILT_IN_CPOW): | |
3209 | CASE_FLT_FN (BUILT_IN_CPROJ): | |
3210 | CASE_FLT_FN (BUILT_IN_CREAL): | |
3211 | CASE_FLT_FN (BUILT_IN_CSIN): | |
3212 | CASE_FLT_FN (BUILT_IN_CSINH): | |
3213 | CASE_FLT_FN (BUILT_IN_CSQRT): | |
3214 | CASE_FLT_FN (BUILT_IN_CTAN): | |
3215 | CASE_FLT_FN (BUILT_IN_CTANH): | |
3216 | return "<complex.h>"; | |
3217 | case BUILT_IN_MEMCHR: | |
3218 | case BUILT_IN_MEMCMP: | |
3219 | case BUILT_IN_MEMCPY: | |
3220 | case BUILT_IN_MEMMOVE: | |
3221 | case BUILT_IN_MEMSET: | |
3222 | case BUILT_IN_STRCAT: | |
3223 | case BUILT_IN_STRCHR: | |
3224 | case BUILT_IN_STRCMP: | |
3225 | case BUILT_IN_STRCPY: | |
3226 | case BUILT_IN_STRCSPN: | |
3227 | case BUILT_IN_STRLEN: | |
3228 | case BUILT_IN_STRNCAT: | |
3229 | case BUILT_IN_STRNCMP: | |
3230 | case BUILT_IN_STRNCPY: | |
3231 | case BUILT_IN_STRPBRK: | |
3232 | case BUILT_IN_STRRCHR: | |
3233 | case BUILT_IN_STRSPN: | |
3234 | case BUILT_IN_STRSTR: | |
3235 | return "<string.h>"; | |
3236 | case BUILT_IN_FPRINTF: | |
3237 | case BUILT_IN_PUTC: | |
3238 | case BUILT_IN_FPUTC: | |
3239 | case BUILT_IN_FPUTS: | |
3240 | case BUILT_IN_FSCANF: | |
3241 | case BUILT_IN_FWRITE: | |
3242 | case BUILT_IN_PRINTF: | |
3243 | case BUILT_IN_PUTCHAR: | |
3244 | case BUILT_IN_PUTS: | |
3245 | case BUILT_IN_SCANF: | |
3246 | case BUILT_IN_SNPRINTF: | |
3247 | case BUILT_IN_SPRINTF: | |
3248 | case BUILT_IN_SSCANF: | |
3249 | case BUILT_IN_VFPRINTF: | |
3250 | case BUILT_IN_VFSCANF: | |
3251 | case BUILT_IN_VPRINTF: | |
3252 | case BUILT_IN_VSCANF: | |
3253 | case BUILT_IN_VSNPRINTF: | |
3254 | case BUILT_IN_VSPRINTF: | |
3255 | case BUILT_IN_VSSCANF: | |
3256 | return "<stdio.h>"; | |
3257 | case BUILT_IN_ISALNUM: | |
3258 | case BUILT_IN_ISALPHA: | |
3259 | case BUILT_IN_ISBLANK: | |
3260 | case BUILT_IN_ISCNTRL: | |
3261 | case BUILT_IN_ISDIGIT: | |
3262 | case BUILT_IN_ISGRAPH: | |
3263 | case BUILT_IN_ISLOWER: | |
3264 | case BUILT_IN_ISPRINT: | |
3265 | case BUILT_IN_ISPUNCT: | |
3266 | case BUILT_IN_ISSPACE: | |
3267 | case BUILT_IN_ISUPPER: | |
3268 | case BUILT_IN_ISXDIGIT: | |
3269 | case BUILT_IN_TOLOWER: | |
3270 | case BUILT_IN_TOUPPER: | |
3271 | return "<ctype.h>"; | |
3272 | case BUILT_IN_ISWALNUM: | |
3273 | case BUILT_IN_ISWALPHA: | |
3274 | case BUILT_IN_ISWBLANK: | |
3275 | case BUILT_IN_ISWCNTRL: | |
3276 | case BUILT_IN_ISWDIGIT: | |
3277 | case BUILT_IN_ISWGRAPH: | |
3278 | case BUILT_IN_ISWLOWER: | |
3279 | case BUILT_IN_ISWPRINT: | |
3280 | case BUILT_IN_ISWPUNCT: | |
3281 | case BUILT_IN_ISWSPACE: | |
3282 | case BUILT_IN_ISWUPPER: | |
3283 | case BUILT_IN_ISWXDIGIT: | |
3284 | case BUILT_IN_TOWLOWER: | |
3285 | case BUILT_IN_TOWUPPER: | |
3286 | return "<wctype.h>"; | |
3287 | case BUILT_IN_ABORT: | |
3288 | case BUILT_IN_ABS: | |
3289 | case BUILT_IN_CALLOC: | |
3290 | case BUILT_IN_EXIT: | |
3291 | case BUILT_IN_FREE: | |
3292 | case BUILT_IN_LABS: | |
3293 | case BUILT_IN_LLABS: | |
3294 | case BUILT_IN_MALLOC: | |
3295 | case BUILT_IN_REALLOC: | |
3296 | case BUILT_IN__EXIT2: | |
3297 | case BUILT_IN_ALIGNED_ALLOC: | |
3298 | return "<stdlib.h>"; | |
3299 | case BUILT_IN_IMAXABS: | |
3300 | return "<inttypes.h>"; | |
3301 | case BUILT_IN_STRFTIME: | |
3302 | return "<time.h>"; | |
3303 | default: | |
3304 | return NULL; | |
3305 | } | |
3306 | } | |
3307 | ||
c2255bc4 | 3308 | /* Generate an implicit declaration for identifier FUNCTIONID at LOC as a |
339a28b9 | 3309 | function of type int (). */ |
51e29401 RS |
3310 | |
3311 | tree | |
c2255bc4 | 3312 | implicitly_declare (location_t loc, tree functionid) |
51e29401 | 3313 | { |
0b410f0b JM |
3314 | struct c_binding *b; |
3315 | tree decl = 0; | |
1ae57298 MM |
3316 | tree asmspec_tree; |
3317 | ||
0b410f0b JM |
3318 | for (b = I_SYMBOL_BINDING (functionid); b; b = b->shadowed) |
3319 | { | |
3320 | if (B_IN_SCOPE (b, external_scope)) | |
3321 | { | |
3322 | decl = b->decl; | |
3323 | break; | |
3324 | } | |
3325 | } | |
51e29401 | 3326 | |
f91f41b2 | 3327 | if (decl) |
339a28b9 | 3328 | { |
d8dd2f3a JJ |
3329 | if (decl == error_mark_node) |
3330 | return decl; | |
3331 | ||
f75fbaf7 ZW |
3332 | /* FIXME: Objective-C has weird not-really-builtin functions |
3333 | which are supposed to be visible automatically. They wind up | |
3334 | in the external scope because they're pushed before the file | |
3335 | scope gets created. Catch this here and rebind them into the | |
3336 | file scope. */ | |
3c20847b | 3337 | if (!DECL_BUILT_IN (decl) && DECL_IS_BUILTIN (decl)) |
f75fbaf7 | 3338 | { |
9aaabf8a | 3339 | bind (functionid, decl, file_scope, |
b3f27c15 JJ |
3340 | /*invisible=*/false, /*nested=*/true, |
3341 | DECL_SOURCE_LOCATION (decl)); | |
f75fbaf7 ZW |
3342 | return decl; |
3343 | } | |
3344 | else | |
339a28b9 | 3345 | { |
0b410f0b | 3346 | tree newtype = default_function_type; |
e1b7793c ILT |
3347 | if (b->u.type) |
3348 | TREE_TYPE (decl) = b->u.type; | |
f75fbaf7 ZW |
3349 | /* Implicit declaration of a function already declared |
3350 | (somehow) in a different scope, or as a built-in. | |
3351 | If this is the first time this has happened, warn; | |
0b410f0b | 3352 | then recycle the old declaration but with the new type. */ |
f75fbaf7 ZW |
3353 | if (!C_DECL_IMPLICIT (decl)) |
3354 | { | |
30281de2 | 3355 | implicit_decl_warning (loc, functionid, decl); |
f75fbaf7 ZW |
3356 | C_DECL_IMPLICIT (decl) = 1; |
3357 | } | |
9cbe78fb JM |
3358 | if (DECL_BUILT_IN (decl)) |
3359 | { | |
0b410f0b JM |
3360 | newtype = build_type_attribute_variant (newtype, |
3361 | TYPE_ATTRIBUTES | |
3362 | (TREE_TYPE (decl))); | |
3363 | if (!comptypes (newtype, TREE_TYPE (decl))) | |
9cbe78fb | 3364 | { |
0382aaa0 MP |
3365 | bool warned = warning_at (loc, 0, "incompatible implicit " |
3366 | "declaration of built-in " | |
3367 | "function %qD", decl); | |
3368 | /* See if we can hint which header to include. */ | |
3369 | const char *header | |
3370 | = header_for_builtin_fn (DECL_FUNCTION_CODE (decl)); | |
3371 | if (header != NULL && warned) | |
3372 | inform (loc, "include %qs or provide a declaration of %qD", | |
3373 | header, decl); | |
0b410f0b | 3374 | newtype = TREE_TYPE (decl); |
9cbe78fb JM |
3375 | } |
3376 | } | |
3377 | else | |
3378 | { | |
0b410f0b | 3379 | if (!comptypes (newtype, TREE_TYPE (decl))) |
9cbe78fb | 3380 | { |
0382aaa0 MP |
3381 | error_at (loc, "incompatible implicit declaration of " |
3382 | "function %qD", decl); | |
71205d17 | 3383 | locate_old_decl (decl); |
9cbe78fb JM |
3384 | } |
3385 | } | |
e1b7793c | 3386 | b->u.type = TREE_TYPE (decl); |
0b410f0b | 3387 | TREE_TYPE (decl) = newtype; |
9aaabf8a | 3388 | bind (functionid, decl, current_scope, |
b3f27c15 JJ |
3389 | /*invisible=*/false, /*nested=*/true, |
3390 | DECL_SOURCE_LOCATION (decl)); | |
f75fbaf7 | 3391 | return decl; |
339a28b9 | 3392 | } |
339a28b9 | 3393 | } |
51e29401 | 3394 | |
339a28b9 | 3395 | /* Not seen before. */ |
c2255bc4 | 3396 | decl = build_decl (loc, FUNCTION_DECL, functionid, default_function_type); |
1394aabd | 3397 | DECL_EXTERNAL (decl) = 1; |
51e29401 | 3398 | TREE_PUBLIC (decl) = 1; |
339a28b9 | 3399 | C_DECL_IMPLICIT (decl) = 1; |
30281de2 | 3400 | implicit_decl_warning (loc, functionid, 0); |
1ae57298 MM |
3401 | asmspec_tree = maybe_apply_renaming_pragma (decl, /*asmname=*/NULL); |
3402 | if (asmspec_tree) | |
3403 | set_user_assembler_name (decl, TREE_STRING_POINTER (asmspec_tree)); | |
51e29401 | 3404 | |
14077d68 | 3405 | /* C89 says implicit declarations are in the innermost block. |
f458d1d5 | 3406 | So we record the decl in the standard fashion. */ |
339a28b9 | 3407 | decl = pushdecl (decl); |
51e29401 | 3408 | |
339a28b9 | 3409 | /* No need to call objc_check_decl here - it's a function type. */ |
0e6df31e | 3410 | rest_of_decl_compilation (decl, 0, 0); |
51e29401 | 3411 | |
14077d68 ZW |
3412 | /* Write a record describing this implicit function declaration |
3413 | to the prototypes file (if requested). */ | |
51e29401 RS |
3414 | gen_aux_info_record (decl, 0, 1, 0); |
3415 | ||
6431177a JM |
3416 | /* Possibly apply some default attributes to this implicit declaration. */ |
3417 | decl_attributes (&decl, NULL_TREE, 0); | |
3418 | ||
51e29401 RS |
3419 | return decl; |
3420 | } | |
3421 | ||
9cd51ef6 ZW |
3422 | /* Issue an error message for a reference to an undeclared variable |
3423 | ID, including a reference to a builtin outside of function-call | |
3424 | context. Establish a binding of the identifier to error_mark_node | |
3425 | in an appropriate scope, which will suppress further errors for the | |
766beb40 | 3426 | same identifier. The error message should be given location LOC. */ |
9cd51ef6 | 3427 | void |
c2255bc4 | 3428 | undeclared_variable (location_t loc, tree id) |
9cd51ef6 ZW |
3429 | { |
3430 | static bool already = false; | |
f91f41b2 | 3431 | struct c_scope *scope; |
9cd51ef6 ZW |
3432 | |
3433 | if (current_function_decl == 0) | |
3434 | { | |
fab922b1 | 3435 | error_at (loc, "%qE undeclared here (not in a function)", id); |
f91f41b2 | 3436 | scope = current_scope; |
9cd51ef6 ZW |
3437 | } |
3438 | else | |
3439 | { | |
90fbfdc3 NP |
3440 | if (!objc_diagnose_private_ivar (id)) |
3441 | error_at (loc, "%qE undeclared (first use in this function)", id); | |
3f75a254 | 3442 | if (!already) |
9cd51ef6 | 3443 | { |
0b901e4c MLI |
3444 | inform (loc, "each undeclared identifier is reported only" |
3445 | " once for each function it appears in"); | |
9cd51ef6 ZW |
3446 | already = true; |
3447 | } | |
3448 | ||
f75fbaf7 | 3449 | /* If we are parsing old-style parameter decls, current_function_decl |
c22cacf3 | 3450 | will be nonnull but current_function_scope will be null. */ |
f75fbaf7 | 3451 | scope = current_function_scope ? current_function_scope : current_scope; |
9cd51ef6 | 3452 | } |
b3f27c15 JJ |
3453 | bind (id, error_mark_node, scope, /*invisible=*/false, /*nested=*/false, |
3454 | UNKNOWN_LOCATION); | |
9cd51ef6 | 3455 | } |
51e29401 | 3456 | \f |
14e33ee8 | 3457 | /* Subroutine of lookup_label, declare_label, define_label: construct a |
e1b7793c ILT |
3458 | LABEL_DECL with all the proper frills. Also create a struct |
3459 | c_label_vars initialized for the current scope. */ | |
14e33ee8 ZW |
3460 | |
3461 | static tree | |
e1b7793c ILT |
3462 | make_label (location_t location, tree name, bool defining, |
3463 | struct c_label_vars **p_label_vars) | |
14e33ee8 | 3464 | { |
c2255bc4 | 3465 | tree label = build_decl (location, LABEL_DECL, name, void_type_node); |
14e33ee8 ZW |
3466 | DECL_CONTEXT (label) = current_function_decl; |
3467 | DECL_MODE (label) = VOIDmode; | |
14e33ee8 | 3468 | |
766090c2 | 3469 | c_label_vars *label_vars = ggc_alloc<c_label_vars> (); |
e1b7793c ILT |
3470 | label_vars->shadowed = NULL; |
3471 | set_spot_bindings (&label_vars->label_bindings, defining); | |
3472 | label_vars->decls_in_scope = make_tree_vector (); | |
9771b263 | 3473 | label_vars->gotos = NULL; |
e1b7793c ILT |
3474 | *p_label_vars = label_vars; |
3475 | ||
14e33ee8 ZW |
3476 | return label; |
3477 | } | |
3478 | ||
14e33ee8 | 3479 | /* Get the LABEL_DECL corresponding to identifier NAME as a label. |
51e29401 | 3480 | Create one if none exists so far for the current function. |
14e33ee8 ZW |
3481 | This is called when a label is used in a goto expression or |
3482 | has its address taken. */ | |
51e29401 RS |
3483 | |
3484 | tree | |
14e33ee8 | 3485 | lookup_label (tree name) |
51e29401 | 3486 | { |
14e33ee8 | 3487 | tree label; |
e1b7793c | 3488 | struct c_label_vars *label_vars; |
51e29401 | 3489 | |
c58e98c8 | 3490 | if (current_function_scope == 0) |
7d9795e5 | 3491 | { |
c51a1ba9 | 3492 | error ("label %qE referenced outside of any function", name); |
7d9795e5 RS |
3493 | return 0; |
3494 | } | |
3495 | ||
14e33ee8 ZW |
3496 | /* Use a label already defined or ref'd with this name, but not if |
3497 | it is inherited from a containing function and wasn't declared | |
3498 | using __label__. */ | |
f75fbaf7 | 3499 | label = I_LABEL_DECL (name); |
14e33ee8 ZW |
3500 | if (label && (DECL_CONTEXT (label) == current_function_decl |
3501 | || C_DECLARED_LABEL_FLAG (label))) | |
51e29401 | 3502 | { |
14e33ee8 ZW |
3503 | /* If the label has only been declared, update its apparent |
3504 | location to point here, for better diagnostics if it | |
3505 | turns out not to have been defined. */ | |
e1b7793c | 3506 | if (DECL_INITIAL (label) == NULL_TREE) |
f31686a3 | 3507 | DECL_SOURCE_LOCATION (label) = input_location; |
14e33ee8 | 3508 | return label; |
51e29401 RS |
3509 | } |
3510 | ||
14e33ee8 | 3511 | /* No label binding for that identifier; make one. */ |
e1b7793c | 3512 | label = make_label (input_location, name, false, &label_vars); |
51e29401 | 3513 | |
14077d68 | 3514 | /* Ordinary labels go in the current function scope. */ |
e1b7793c ILT |
3515 | bind_label (name, label, current_function_scope, label_vars); |
3516 | ||
3517 | return label; | |
3518 | } | |
3519 | ||
3520 | /* Issue a warning about DECL for a goto statement at GOTO_LOC going | |
3521 | to LABEL. */ | |
3522 | ||
3523 | static void | |
3524 | warn_about_goto (location_t goto_loc, tree label, tree decl) | |
3525 | { | |
3526 | if (variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) | |
3527 | error_at (goto_loc, | |
3528 | "jump into scope of identifier with variably modified type"); | |
3529 | else | |
3530 | warning_at (goto_loc, OPT_Wjump_misses_init, | |
3531 | "jump skips variable initialization"); | |
3532 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", label); | |
3533 | inform (DECL_SOURCE_LOCATION (decl), "%qD declared here", decl); | |
3534 | } | |
3535 | ||
3536 | /* Look up a label because of a goto statement. This is like | |
3537 | lookup_label, but also issues any appropriate warnings. */ | |
3538 | ||
3539 | tree | |
3540 | lookup_label_for_goto (location_t loc, tree name) | |
3541 | { | |
3542 | tree label; | |
3543 | struct c_label_vars *label_vars; | |
3544 | unsigned int ix; | |
3545 | tree decl; | |
3546 | ||
3547 | label = lookup_label (name); | |
3548 | if (label == NULL_TREE) | |
3549 | return NULL_TREE; | |
3550 | ||
3551 | /* If we are jumping to a different function, we can't issue any | |
3552 | useful warnings. */ | |
3553 | if (DECL_CONTEXT (label) != current_function_decl) | |
3554 | { | |
3555 | gcc_assert (C_DECLARED_LABEL_FLAG (label)); | |
3556 | return label; | |
3557 | } | |
3558 | ||
3559 | label_vars = I_LABEL_BINDING (name)->u.label; | |
3560 | ||
3561 | /* If the label has not yet been defined, then push this goto on a | |
3562 | list for possible later warnings. */ | |
3563 | if (label_vars->label_bindings.scope == NULL) | |
3564 | { | |
766090c2 | 3565 | c_goto_bindings *g = ggc_alloc<c_goto_bindings> (); |
e1b7793c | 3566 | |
e1b7793c ILT |
3567 | g->loc = loc; |
3568 | set_spot_bindings (&g->goto_bindings, true); | |
9771b263 | 3569 | vec_safe_push (label_vars->gotos, g); |
e1b7793c ILT |
3570 | return label; |
3571 | } | |
3572 | ||
3573 | /* If there are any decls in label_vars->decls_in_scope, then this | |
3574 | goto has missed the declaration of the decl. This happens for a | |
3575 | case like | |
3576 | int i = 1; | |
3577 | lab: | |
3578 | ... | |
3579 | goto lab; | |
3580 | Issue a warning or error. */ | |
9771b263 | 3581 | FOR_EACH_VEC_SAFE_ELT (label_vars->decls_in_scope, ix, decl) |
e1b7793c ILT |
3582 | warn_about_goto (loc, label, decl); |
3583 | ||
3584 | if (label_vars->label_bindings.left_stmt_expr) | |
3585 | { | |
3586 | error_at (loc, "jump into statement expression"); | |
3587 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", label); | |
3588 | } | |
3589 | ||
14e33ee8 | 3590 | return label; |
51e29401 RS |
3591 | } |
3592 | ||
14e33ee8 ZW |
3593 | /* Make a label named NAME in the current function, shadowing silently |
3594 | any that may be inherited from containing functions or containing | |
3595 | scopes. This is called for __label__ declarations. */ | |
51e29401 | 3596 | |
51e29401 | 3597 | tree |
14e33ee8 | 3598 | declare_label (tree name) |
51e29401 | 3599 | { |
f75fbaf7 ZW |
3600 | struct c_binding *b = I_LABEL_BINDING (name); |
3601 | tree label; | |
e1b7793c | 3602 | struct c_label_vars *label_vars; |
51e29401 | 3603 | |
14e33ee8 ZW |
3604 | /* Check to make sure that the label hasn't already been declared |
3605 | at this scope */ | |
9aaabf8a | 3606 | if (b && B_IN_CURRENT_SCOPE (b)) |
f75fbaf7 | 3607 | { |
c51a1ba9 | 3608 | error ("duplicate label declaration %qE", name); |
71205d17 | 3609 | locate_old_decl (b->decl); |
a784882b | 3610 | |
f75fbaf7 ZW |
3611 | /* Just use the previous declaration. */ |
3612 | return b->decl; | |
3613 | } | |
a784882b | 3614 | |
e1b7793c | 3615 | label = make_label (input_location, name, false, &label_vars); |
14e33ee8 | 3616 | C_DECLARED_LABEL_FLAG (label) = 1; |
51e29401 | 3617 | |
14e33ee8 | 3618 | /* Declared labels go in the current scope. */ |
e1b7793c ILT |
3619 | bind_label (name, label, current_scope, label_vars); |
3620 | ||
14e33ee8 | 3621 | return label; |
51e29401 RS |
3622 | } |
3623 | ||
e1b7793c ILT |
3624 | /* When we define a label, issue any appropriate warnings if there are |
3625 | any gotos earlier in the function which jump to this label. */ | |
3626 | ||
3627 | static void | |
3628 | check_earlier_gotos (tree label, struct c_label_vars* label_vars) | |
3629 | { | |
3630 | unsigned int ix; | |
3631 | struct c_goto_bindings *g; | |
3632 | ||
9771b263 | 3633 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
3634 | { |
3635 | struct c_binding *b; | |
3636 | struct c_scope *scope; | |
3637 | ||
3638 | /* We have a goto to this label. The goto is going forward. In | |
3639 | g->scope, the goto is going to skip any binding which was | |
3640 | defined after g->bindings_in_scope. */ | |
744f0946 | 3641 | if (g->goto_bindings.scope->has_jump_unsafe_decl) |
e1b7793c | 3642 | { |
744f0946 ILT |
3643 | for (b = g->goto_bindings.scope->bindings; |
3644 | b != g->goto_bindings.bindings_in_scope; | |
3645 | b = b->prev) | |
3646 | { | |
3647 | if (decl_jump_unsafe (b->decl)) | |
3648 | warn_about_goto (g->loc, label, b->decl); | |
3649 | } | |
e1b7793c ILT |
3650 | } |
3651 | ||
3652 | /* We also need to warn about decls defined in any scopes | |
3653 | between the scope of the label and the scope of the goto. */ | |
3654 | for (scope = label_vars->label_bindings.scope; | |
3655 | scope != g->goto_bindings.scope; | |
3656 | scope = scope->outer) | |
3657 | { | |
3658 | gcc_assert (scope != NULL); | |
744f0946 | 3659 | if (scope->has_jump_unsafe_decl) |
e1b7793c | 3660 | { |
744f0946 ILT |
3661 | if (scope == label_vars->label_bindings.scope) |
3662 | b = label_vars->label_bindings.bindings_in_scope; | |
3663 | else | |
3664 | b = scope->bindings; | |
3665 | for (; b != NULL; b = b->prev) | |
3666 | { | |
3667 | if (decl_jump_unsafe (b->decl)) | |
3668 | warn_about_goto (g->loc, label, b->decl); | |
3669 | } | |
e1b7793c ILT |
3670 | } |
3671 | } | |
3672 | ||
3673 | if (g->goto_bindings.stmt_exprs > 0) | |
3674 | { | |
3675 | error_at (g->loc, "jump into statement expression"); | |
3676 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", | |
3677 | label); | |
3678 | } | |
3679 | } | |
3680 | ||
3681 | /* Now that the label is defined, we will issue warnings about | |
3682 | subsequent gotos to this label when we see them. */ | |
9771b263 | 3683 | vec_safe_truncate (label_vars->gotos, 0); |
e1b7793c ILT |
3684 | label_vars->gotos = NULL; |
3685 | } | |
3686 | ||
51e29401 RS |
3687 | /* Define a label, specifying the location in the source file. |
3688 | Return the LABEL_DECL node for the label, if the definition is valid. | |
3689 | Otherwise return 0. */ | |
3690 | ||
3691 | tree | |
5b030314 | 3692 | define_label (location_t location, tree name) |
51e29401 | 3693 | { |
14e33ee8 ZW |
3694 | /* Find any preexisting label with this name. It is an error |
3695 | if that label has already been defined in this function, or | |
3696 | if there is a containing function with a declared label with | |
3697 | the same name. */ | |
f75fbaf7 | 3698 | tree label = I_LABEL_DECL (name); |
14e33ee8 ZW |
3699 | |
3700 | if (label | |
3701 | && ((DECL_CONTEXT (label) == current_function_decl | |
3702 | && DECL_INITIAL (label) != 0) | |
3703 | || (DECL_CONTEXT (label) != current_function_decl | |
3704 | && C_DECLARED_LABEL_FLAG (label)))) | |
51e29401 | 3705 | { |
c2255bc4 | 3706 | error_at (location, "duplicate label %qD", label); |
71205d17 | 3707 | locate_old_decl (label); |
14e33ee8 | 3708 | return 0; |
51e29401 | 3709 | } |
14e33ee8 | 3710 | else if (label && DECL_CONTEXT (label) == current_function_decl) |
51e29401 | 3711 | { |
e1b7793c ILT |
3712 | struct c_label_vars *label_vars = I_LABEL_BINDING (name)->u.label; |
3713 | ||
14e33ee8 ZW |
3714 | /* The label has been used or declared already in this function, |
3715 | but not defined. Update its location to point to this | |
3716 | definition. */ | |
f31686a3 | 3717 | DECL_SOURCE_LOCATION (label) = location; |
e1b7793c ILT |
3718 | set_spot_bindings (&label_vars->label_bindings, true); |
3719 | ||
3720 | /* Issue warnings as required about any goto statements from | |
3721 | earlier in the function. */ | |
3722 | check_earlier_gotos (label, label_vars); | |
51e29401 RS |
3723 | } |
3724 | else | |
3725 | { | |
e1b7793c ILT |
3726 | struct c_label_vars *label_vars; |
3727 | ||
14e33ee8 | 3728 | /* No label binding for that identifier; make one. */ |
e1b7793c | 3729 | label = make_label (location, name, true, &label_vars); |
14e33ee8 | 3730 | |
14077d68 | 3731 | /* Ordinary labels go in the current function scope. */ |
e1b7793c | 3732 | bind_label (name, label, current_function_scope, label_vars); |
51e29401 | 3733 | } |
14e33ee8 | 3734 | |
8400e75e | 3735 | if (!in_system_header_at (input_location) && lookup_name (name)) |
c2255bc4 AH |
3736 | warning_at (location, OPT_Wtraditional, |
3737 | "traditional C lacks a separate namespace " | |
3738 | "for labels, identifier %qE conflicts", name); | |
14e33ee8 ZW |
3739 | |
3740 | /* Mark label as having been defined. */ | |
3741 | DECL_INITIAL (label) = error_mark_node; | |
3742 | return label; | |
51e29401 | 3743 | } |
51e29401 | 3744 | \f |
e1b7793c ILT |
3745 | /* Get the bindings for a new switch statement. This is used to issue |
3746 | warnings as appropriate for jumps from the switch to case or | |
3747 | default labels. */ | |
3748 | ||
3749 | struct c_spot_bindings * | |
3750 | c_get_switch_bindings (void) | |
3751 | { | |
3752 | struct c_spot_bindings *switch_bindings; | |
3753 | ||
3754 | switch_bindings = XNEW (struct c_spot_bindings); | |
3755 | set_spot_bindings (switch_bindings, true); | |
3756 | return switch_bindings; | |
3757 | } | |
3758 | ||
3759 | void | |
3760 | c_release_switch_bindings (struct c_spot_bindings *bindings) | |
3761 | { | |
3762 | gcc_assert (bindings->stmt_exprs == 0 && !bindings->left_stmt_expr); | |
3763 | XDELETE (bindings); | |
3764 | } | |
3765 | ||
3766 | /* This is called at the point of a case or default label to issue | |
3767 | warnings about decls as needed. It returns true if it found an | |
3768 | error, not just a warning. */ | |
3769 | ||
3770 | bool | |
3771 | c_check_switch_jump_warnings (struct c_spot_bindings *switch_bindings, | |
3772 | location_t switch_loc, location_t case_loc) | |
3773 | { | |
3774 | bool saw_error; | |
3775 | struct c_scope *scope; | |
3776 | ||
3777 | saw_error = false; | |
3778 | for (scope = current_scope; | |
3779 | scope != switch_bindings->scope; | |
3780 | scope = scope->outer) | |
3781 | { | |
3782 | struct c_binding *b; | |
3783 | ||
3784 | gcc_assert (scope != NULL); | |
744f0946 ILT |
3785 | |
3786 | if (!scope->has_jump_unsafe_decl) | |
3787 | continue; | |
3788 | ||
e1b7793c ILT |
3789 | for (b = scope->bindings; b != NULL; b = b->prev) |
3790 | { | |
3791 | if (decl_jump_unsafe (b->decl)) | |
3792 | { | |
3793 | if (variably_modified_type_p (TREE_TYPE (b->decl), NULL_TREE)) | |
3794 | { | |
3795 | saw_error = true; | |
3796 | error_at (case_loc, | |
3797 | ("switch jumps into scope of identifier with " | |
3798 | "variably modified type")); | |
3799 | } | |
3800 | else | |
3801 | warning_at (case_loc, OPT_Wjump_misses_init, | |
3802 | "switch jumps over variable initialization"); | |
3803 | inform (switch_loc, "switch starts here"); | |
3804 | inform (DECL_SOURCE_LOCATION (b->decl), "%qD declared here", | |
3805 | b->decl); | |
3806 | } | |
3807 | } | |
3808 | } | |
3809 | ||
3810 | if (switch_bindings->stmt_exprs > 0) | |
3811 | { | |
3812 | saw_error = true; | |
3813 | error_at (case_loc, "switch jumps into statement expression"); | |
3814 | inform (switch_loc, "switch starts here"); | |
3815 | } | |
3816 | ||
3817 | return saw_error; | |
3818 | } | |
3819 | \f | |
51e29401 RS |
3820 | /* Given NAME, an IDENTIFIER_NODE, |
3821 | return the structure (or union or enum) definition for that name. | |
f8521984 | 3822 | If THISLEVEL_ONLY is nonzero, searches only the current_scope. |
51e29401 RS |
3823 | CODE says which kind of type the caller wants; |
3824 | it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE. | |
24b97832 ILT |
3825 | If PLOC is not NULL and this returns non-null, it sets *PLOC to the |
3826 | location where the tag was defined. | |
51e29401 RS |
3827 | If the wrong kind of type is found, an error is reported. */ |
3828 | ||
3829 | static tree | |
24b97832 ILT |
3830 | lookup_tag (enum tree_code code, tree name, int thislevel_only, |
3831 | location_t *ploc) | |
51e29401 | 3832 | { |
f75fbaf7 | 3833 | struct c_binding *b = I_TAG_BINDING (name); |
339a28b9 | 3834 | int thislevel = 0; |
51e29401 | 3835 | |
f75fbaf7 | 3836 | if (!b || !b->decl) |
339a28b9 ZW |
3837 | return 0; |
3838 | ||
3839 | /* We only care about whether it's in this level if | |
3840 | thislevel_only was set or it might be a type clash. */ | |
f75fbaf7 ZW |
3841 | if (thislevel_only || TREE_CODE (b->decl) != code) |
3842 | { | |
3843 | /* For our purposes, a tag in the external scope is the same as | |
3844 | a tag in the file scope. (Primarily relevant to Objective-C | |
3845 | and its builtin structure tags, which get pushed before the | |
118a3a8b | 3846 | file scope is created.) */ |
9aaabf8a ZW |
3847 | if (B_IN_CURRENT_SCOPE (b) |
3848 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
339a28b9 | 3849 | thislevel = 1; |
51e29401 | 3850 | } |
339a28b9 ZW |
3851 | |
3852 | if (thislevel_only && !thislevel) | |
3853 | return 0; | |
3854 | ||
f75fbaf7 | 3855 | if (TREE_CODE (b->decl) != code) |
339a28b9 ZW |
3856 | { |
3857 | /* Definition isn't the kind we were looking for. */ | |
3858 | pending_invalid_xref = name; | |
070588f0 | 3859 | pending_invalid_xref_location = input_location; |
339a28b9 ZW |
3860 | |
3861 | /* If in the same binding level as a declaration as a tag | |
3862 | of a different type, this must not be allowed to | |
3863 | shadow that tag, so give the error immediately. | |
3864 | (For example, "struct foo; union foo;" is invalid.) */ | |
3865 | if (thislevel) | |
3866 | pending_xref_error (); | |
3867 | } | |
24b97832 ILT |
3868 | |
3869 | if (ploc != NULL) | |
3870 | *ploc = b->locus; | |
3871 | ||
f75fbaf7 | 3872 | return b->decl; |
51e29401 RS |
3873 | } |
3874 | ||
3875 | /* Print an error message now | |
3876 | for a recent invalid struct, union or enum cross reference. | |
3877 | We don't print them immediately because they are not invalid | |
3878 | when used in the `struct foo;' construct for shadowing. */ | |
3879 | ||
3880 | void | |
35b1a6fa | 3881 | pending_xref_error (void) |
51e29401 RS |
3882 | { |
3883 | if (pending_invalid_xref != 0) | |
fab922b1 MLI |
3884 | error_at (pending_invalid_xref_location, "%qE defined as wrong kind of tag", |
3885 | pending_invalid_xref); | |
51e29401 RS |
3886 | pending_invalid_xref = 0; |
3887 | } | |
3888 | ||
51e29401 | 3889 | \f |
f8521984 | 3890 | /* Look up NAME in the current scope and its superiors |
51e29401 RS |
3891 | in the namespace of variables, functions and typedefs. |
3892 | Return a ..._DECL node of some kind representing its definition, | |
3893 | or return 0 if it is undefined. */ | |
3894 | ||
3895 | tree | |
35b1a6fa | 3896 | lookup_name (tree name) |
51e29401 | 3897 | { |
f75fbaf7 | 3898 | struct c_binding *b = I_SYMBOL_BINDING (name); |
9aaabf8a | 3899 | if (b && !b->invisible) |
3797cb21 DS |
3900 | { |
3901 | maybe_record_typedef_use (b->decl); | |
3902 | return b->decl; | |
3903 | } | |
f75fbaf7 | 3904 | return 0; |
51e29401 RS |
3905 | } |
3906 | ||
f75fbaf7 | 3907 | /* Similar to `lookup_name' but look only at the indicated scope. */ |
51e29401 | 3908 | |
339a28b9 | 3909 | static tree |
f75fbaf7 | 3910 | lookup_name_in_scope (tree name, struct c_scope *scope) |
51e29401 | 3911 | { |
f75fbaf7 | 3912 | struct c_binding *b; |
339a28b9 | 3913 | |
f75fbaf7 | 3914 | for (b = I_SYMBOL_BINDING (name); b; b = b->shadowed) |
9aaabf8a | 3915 | if (B_IN_SCOPE (b, scope)) |
f75fbaf7 | 3916 | return b->decl; |
339a28b9 | 3917 | return 0; |
51e29401 RS |
3918 | } |
3919 | \f | |
3920 | /* Create the predefined scalar types of C, | |
0f41302f | 3921 | and some nodes representing standard constants (0, 1, (void *) 0). |
f8521984 | 3922 | Initialize the global scope. |
51e29401 RS |
3923 | Make definitions for built-in primitive functions. */ |
3924 | ||
3925 | void | |
35b1a6fa | 3926 | c_init_decl_processing (void) |
51e29401 | 3927 | { |
4714db5a | 3928 | location_t save_loc = input_location; |
e13e48e7 | 3929 | |
27bf414c | 3930 | /* Initialize reserved words for parser. */ |
f5e99456 NB |
3931 | c_parse_init (); |
3932 | ||
14077d68 | 3933 | current_function_decl = 0; |
6645c3fa | 3934 | |
bc4b653b JM |
3935 | gcc_obstack_init (&parser_obstack); |
3936 | ||
f75fbaf7 ZW |
3937 | /* Make the externals scope. */ |
3938 | push_scope (); | |
3939 | external_scope = current_scope; | |
14077d68 | 3940 | |
e3091a5f R |
3941 | /* Declarations from c_common_nodes_and_builtins must not be associated |
3942 | with this input file, lest we get differences between using and not | |
3943 | using preprocessed headers. */ | |
3c20847b | 3944 | input_location = BUILTINS_LOCATION; |
51e29401 | 3945 | |
eaa7c03f | 3946 | c_common_nodes_and_builtins (); |
51e29401 | 3947 | |
de7df9eb JM |
3948 | /* In C, comparisons and TRUTH_* expressions have type int. */ |
3949 | truthvalue_type_node = integer_type_node; | |
3950 | truthvalue_true_node = integer_one_node; | |
3951 | truthvalue_false_node = integer_zero_node; | |
3952 | ||
3953 | /* Even in C99, which has a real boolean type. */ | |
c2255bc4 | 3954 | pushdecl (build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier ("_Bool"), |
de7df9eb | 3955 | boolean_type_node)); |
19552aa5 | 3956 | |
4714db5a | 3957 | input_location = save_loc; |
e3091a5f | 3958 | |
2ce07e2d | 3959 | make_fname_decl = c_make_fname_decl; |
0ba8a114 | 3960 | start_fname_decls (); |
51e29401 RS |
3961 | } |
3962 | ||
c2255bc4 AH |
3963 | /* Create the VAR_DECL at LOC for __FUNCTION__ etc. ID is the name to |
3964 | give the decl, NAME is the initialization string and TYPE_DEP | |
3965 | indicates whether NAME depended on the type of the function. As we | |
3966 | don't yet implement delayed emission of static data, we mark the | |
3967 | decl as emitted so it is not placed in the output. Anything using | |
3968 | it must therefore pull out the STRING_CST initializer directly. | |
3969 | FIXME. */ | |
2ce07e2d NS |
3970 | |
3971 | static tree | |
c2255bc4 | 3972 | c_make_fname_decl (location_t loc, tree id, int type_dep) |
2ce07e2d | 3973 | { |
0ba8a114 | 3974 | const char *name = fname_as_string (type_dep); |
2ce07e2d NS |
3975 | tree decl, type, init; |
3976 | size_t length = strlen (name); | |
3977 | ||
46df2823 JM |
3978 | type = build_array_type (char_type_node, |
3979 | build_index_type (size_int (length))); | |
3980 | type = c_build_qualified_type (type, TYPE_QUAL_CONST); | |
2ce07e2d | 3981 | |
c2255bc4 | 3982 | decl = build_decl (loc, VAR_DECL, id, type); |
35b1a6fa | 3983 | |
2ce07e2d NS |
3984 | TREE_STATIC (decl) = 1; |
3985 | TREE_READONLY (decl) = 1; | |
2ce07e2d | 3986 | DECL_ARTIFICIAL (decl) = 1; |
35b1a6fa | 3987 | |
2ce07e2d | 3988 | init = build_string (length + 1, name); |
b1d5455a | 3989 | free (CONST_CAST (char *, name)); |
2ce07e2d NS |
3990 | TREE_TYPE (init) = type; |
3991 | DECL_INITIAL (decl) = init; | |
0ba8a114 NS |
3992 | |
3993 | TREE_USED (decl) = 1; | |
6cce57b0 | 3994 | |
1a4259dc JH |
3995 | if (current_function_decl |
3996 | /* For invalid programs like this: | |
b8698a0f | 3997 | |
1a4259dc JH |
3998 | void foo() |
3999 | const char* p = __FUNCTION__; | |
b8698a0f | 4000 | |
1a4259dc JH |
4001 | the __FUNCTION__ is believed to appear in K&R style function |
4002 | parameter declarator. In that case we still don't have | |
4003 | function_scope. */ | |
1da2ed5f | 4004 | && (!seen_error () || current_function_scope)) |
f91f41b2 ZW |
4005 | { |
4006 | DECL_CONTEXT (decl) = current_function_decl; | |
9aaabf8a | 4007 | bind (id, decl, current_function_scope, |
b3f27c15 | 4008 | /*invisible=*/false, /*nested=*/false, UNKNOWN_LOCATION); |
f91f41b2 | 4009 | } |
339a28b9 | 4010 | |
c2255bc4 | 4011 | finish_decl (decl, loc, init, NULL_TREE, NULL_TREE); |
6645c3fa | 4012 | |
2ce07e2d NS |
4013 | return decl; |
4014 | } | |
4015 | ||
929f3671 | 4016 | tree |
c79efc4d | 4017 | c_builtin_function (tree decl) |
51e29401 | 4018 | { |
c79efc4d RÁE |
4019 | tree type = TREE_TYPE (decl); |
4020 | tree id = DECL_NAME (decl); | |
4021 | ||
4022 | const char *name = IDENTIFIER_POINTER (id); | |
f4da8dce | 4023 | C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type); |
26db82d8 | 4024 | |
f75fbaf7 | 4025 | /* Should never be called on a symbol with a preexisting meaning. */ |
366de0ce | 4026 | gcc_assert (!I_SYMBOL_BINDING (id)); |
f75fbaf7 | 4027 | |
b3f27c15 JJ |
4028 | bind (id, decl, external_scope, /*invisible=*/true, /*nested=*/false, |
4029 | UNKNOWN_LOCATION); | |
f75fbaf7 | 4030 | |
5779e713 MM |
4031 | /* Builtins in the implementation namespace are made visible without |
4032 | needing to be explicitly declared. See push_file_scope. */ | |
4033 | if (name[0] == '_' && (name[1] == '_' || ISUPPER (name[1]))) | |
4034 | { | |
910ad8de | 4035 | DECL_CHAIN (decl) = visible_builtins; |
5779e713 MM |
4036 | visible_builtins = decl; |
4037 | } | |
4038 | ||
4039 | return decl; | |
4040 | } | |
4041 | ||
4042 | tree | |
4043 | c_builtin_function_ext_scope (tree decl) | |
4044 | { | |
4045 | tree type = TREE_TYPE (decl); | |
4046 | tree id = DECL_NAME (decl); | |
4047 | ||
4048 | const char *name = IDENTIFIER_POINTER (id); | |
f4da8dce | 4049 | C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type); |
5779e713 | 4050 | |
0136f8f0 AH |
4051 | if (external_scope) |
4052 | bind (id, decl, external_scope, /*invisible=*/false, /*nested=*/false, | |
4053 | UNKNOWN_LOCATION); | |
5779e713 | 4054 | |
f75fbaf7 ZW |
4055 | /* Builtins in the implementation namespace are made visible without |
4056 | needing to be explicitly declared. See push_file_scope. */ | |
4057 | if (name[0] == '_' && (name[1] == '_' || ISUPPER (name[1]))) | |
4058 | { | |
910ad8de | 4059 | DECL_CHAIN (decl) = visible_builtins; |
f75fbaf7 ZW |
4060 | visible_builtins = decl; |
4061 | } | |
51e29401 RS |
4062 | |
4063 | return decl; | |
4064 | } | |
4065 | \f | |
4066 | /* Called when a declaration is seen that contains no names to declare. | |
4067 | If its type is a reference to a structure, union or enum inherited | |
4068 | from a containing scope, shadow that tag name for the current scope | |
4069 | with a forward reference. | |
4070 | If its type defines a new named structure or union | |
4071 | or defines an enum, it is valid but we need not do anything here. | |
4072 | Otherwise, it is an error. */ | |
4073 | ||
4074 | void | |
deb176fa | 4075 | shadow_tag (const struct c_declspecs *declspecs) |
9282f2f9 RS |
4076 | { |
4077 | shadow_tag_warned (declspecs, 0); | |
4078 | } | |
4079 | ||
0e6df31e GK |
4080 | /* WARNED is 1 if we have done a pedwarn, 2 if we have done a warning, |
4081 | but no pedwarn. */ | |
9282f2f9 | 4082 | void |
deb176fa | 4083 | shadow_tag_warned (const struct c_declspecs *declspecs, int warned) |
51e29401 | 4084 | { |
deb176fa | 4085 | bool found_tag = false; |
51e29401 | 4086 | |
98c3a782 | 4087 | if (declspecs->type && !declspecs->default_int_p && !declspecs->typedef_p) |
51e29401 | 4088 | { |
deb176fa | 4089 | tree value = declspecs->type; |
b3694847 | 4090 | enum tree_code code = TREE_CODE (value); |
51e29401 RS |
4091 | |
4092 | if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE) | |
4093 | /* Used to test also that TYPE_SIZE (value) != 0. | |
4094 | That caused warning for `struct foo;' at top level in the file. */ | |
4095 | { | |
339a28b9 | 4096 | tree name = TYPE_NAME (value); |
b3694847 | 4097 | tree t; |
51e29401 | 4098 | |
deb176fa | 4099 | found_tag = true; |
51e29401 | 4100 | |
da377db9 JM |
4101 | if (declspecs->restrict_p) |
4102 | { | |
4103 | error ("invalid use of %<restrict%>"); | |
4104 | warned = 1; | |
4105 | } | |
4106 | ||
51e29401 RS |
4107 | if (name == 0) |
4108 | { | |
773edaef RK |
4109 | if (warned != 1 && code != ENUMERAL_TYPE) |
4110 | /* Empty unnamed enum OK */ | |
51e29401 | 4111 | { |
509c9d60 MLI |
4112 | pedwarn (input_location, 0, |
4113 | "unnamed struct/union that defines no instances"); | |
51e29401 RS |
4114 | warned = 1; |
4115 | } | |
4116 | } | |
9e5b2115 PB |
4117 | else if (declspecs->typespec_kind != ctsk_tagdef |
4118 | && declspecs->typespec_kind != ctsk_tagfirstref | |
81da229b JM |
4119 | && declspecs->storage_class != csc_none) |
4120 | { | |
4121 | if (warned != 1) | |
509c9d60 MLI |
4122 | pedwarn (input_location, 0, |
4123 | "empty declaration with storage class specifier " | |
4124 | "does not redeclare tag"); | |
81da229b JM |
4125 | warned = 1; |
4126 | pending_xref_error (); | |
4127 | } | |
9e5b2115 PB |
4128 | else if (declspecs->typespec_kind != ctsk_tagdef |
4129 | && declspecs->typespec_kind != ctsk_tagfirstref | |
81da229b JM |
4130 | && (declspecs->const_p |
4131 | || declspecs->volatile_p | |
267bac10 | 4132 | || declspecs->atomic_p |
36c5e70a BE |
4133 | || declspecs->restrict_p |
4134 | || declspecs->address_space)) | |
81da229b JM |
4135 | { |
4136 | if (warned != 1) | |
509c9d60 MLI |
4137 | pedwarn (input_location, 0, |
4138 | "empty declaration with type qualifier " | |
fcf73884 | 4139 | "does not redeclare tag"); |
81da229b JM |
4140 | warned = 1; |
4141 | pending_xref_error (); | |
4142 | } | |
d19fa6b5 JM |
4143 | else if (declspecs->typespec_kind != ctsk_tagdef |
4144 | && declspecs->typespec_kind != ctsk_tagfirstref | |
4145 | && declspecs->alignas_p) | |
4146 | { | |
4147 | if (warned != 1) | |
4148 | pedwarn (input_location, 0, | |
4149 | "empty declaration with %<_Alignas%> " | |
4150 | "does not redeclare tag"); | |
4151 | warned = 1; | |
4152 | pending_xref_error (); | |
4153 | } | |
51e29401 RS |
4154 | else |
4155 | { | |
81da229b | 4156 | pending_invalid_xref = 0; |
24b97832 | 4157 | t = lookup_tag (code, name, 1, NULL); |
51e29401 RS |
4158 | |
4159 | if (t == 0) | |
4160 | { | |
4161 | t = make_node (code); | |
c2255bc4 | 4162 | pushtag (input_location, name, t); |
51e29401 RS |
4163 | } |
4164 | } | |
4165 | } | |
4166 | else | |
4167 | { | |
8400e75e | 4168 | if (warned != 1 && !in_system_header_at (input_location)) |
773edaef | 4169 | { |
509c9d60 MLI |
4170 | pedwarn (input_location, 0, |
4171 | "useless type name in empty declaration"); | |
deb176fa | 4172 | warned = 1; |
773edaef | 4173 | } |
51e29401 RS |
4174 | } |
4175 | } | |
8400e75e DM |
4176 | else if (warned != 1 && !in_system_header_at (input_location) |
4177 | && declspecs->typedef_p) | |
deb176fa | 4178 | { |
509c9d60 | 4179 | pedwarn (input_location, 0, "useless type name in empty declaration"); |
deb176fa JM |
4180 | warned = 1; |
4181 | } | |
4182 | ||
81da229b JM |
4183 | pending_invalid_xref = 0; |
4184 | ||
9a26d6ee JM |
4185 | if (declspecs->inline_p) |
4186 | { | |
4187 | error ("%<inline%> in empty declaration"); | |
4188 | warned = 1; | |
4189 | } | |
4190 | ||
bbceee64 JM |
4191 | if (declspecs->noreturn_p) |
4192 | { | |
4193 | error ("%<_Noreturn%> in empty declaration"); | |
4194 | warned = 1; | |
4195 | } | |
4196 | ||
9a26d6ee JM |
4197 | if (current_scope == file_scope && declspecs->storage_class == csc_auto) |
4198 | { | |
4199 | error ("%<auto%> in file-scope empty declaration"); | |
4200 | warned = 1; | |
4201 | } | |
4202 | ||
4203 | if (current_scope == file_scope && declspecs->storage_class == csc_register) | |
4204 | { | |
4205 | error ("%<register%> in file-scope empty declaration"); | |
4206 | warned = 1; | |
4207 | } | |
4208 | ||
8400e75e DM |
4209 | if (!warned && !in_system_header_at (input_location) |
4210 | && declspecs->storage_class != csc_none) | |
9a26d6ee | 4211 | { |
d4ee4d25 | 4212 | warning (0, "useless storage class specifier in empty declaration"); |
9a26d6ee JM |
4213 | warned = 2; |
4214 | } | |
4215 | ||
8400e75e | 4216 | if (!warned && !in_system_header_at (input_location) && declspecs->thread_p) |
9a26d6ee | 4217 | { |
582d9b50 JM |
4218 | warning (0, "useless %qs in empty declaration", |
4219 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
4220 | warned = 2; |
4221 | } | |
4222 | ||
8400e75e DM |
4223 | if (!warned |
4224 | && !in_system_header_at (input_location) | |
4225 | && (declspecs->const_p | |
4226 | || declspecs->volatile_p | |
4227 | || declspecs->atomic_p | |
4228 | || declspecs->restrict_p | |
4229 | || declspecs->address_space)) | |
3b53cddc | 4230 | { |
d4ee4d25 | 4231 | warning (0, "useless type qualifier in empty declaration"); |
3b53cddc JM |
4232 | warned = 2; |
4233 | } | |
4234 | ||
8400e75e DM |
4235 | if (!warned && !in_system_header_at (input_location) |
4236 | && declspecs->alignas_p) | |
d19fa6b5 JM |
4237 | { |
4238 | warning (0, "useless %<_Alignas%> in empty declaration"); | |
4239 | warned = 2; | |
4240 | } | |
4241 | ||
773edaef | 4242 | if (warned != 1) |
51e29401 | 4243 | { |
deb176fa | 4244 | if (!found_tag) |
509c9d60 | 4245 | pedwarn (input_location, 0, "empty declaration"); |
51e29401 RS |
4246 | } |
4247 | } | |
4248 | \f | |
3b53cddc JM |
4249 | |
4250 | /* Return the qualifiers from SPECS as a bitwise OR of TYPE_QUAL_* | |
4251 | bits. SPECS represents declaration specifiers that the grammar | |
4252 | only permits to contain type qualifiers and attributes. */ | |
4253 | ||
4254 | int | |
4255 | quals_from_declspecs (const struct c_declspecs *specs) | |
4256 | { | |
4257 | int quals = ((specs->const_p ? TYPE_QUAL_CONST : 0) | |
4258 | | (specs->volatile_p ? TYPE_QUAL_VOLATILE : 0) | |
36c5e70a | 4259 | | (specs->restrict_p ? TYPE_QUAL_RESTRICT : 0) |
267bac10 | 4260 | | (specs->atomic_p ? TYPE_QUAL_ATOMIC : 0) |
36c5e70a | 4261 | | (ENCODE_QUAL_ADDR_SPACE (specs->address_space))); |
3b53cddc JM |
4262 | gcc_assert (!specs->type |
4263 | && !specs->decl_attr | |
98c3a782 | 4264 | && specs->typespec_word == cts_none |
3b53cddc JM |
4265 | && specs->storage_class == csc_none |
4266 | && !specs->typedef_p | |
98c3a782 | 4267 | && !specs->explicit_signed_p |
3b53cddc | 4268 | && !specs->deprecated_p |
98c3a782 | 4269 | && !specs->long_p |
3b53cddc | 4270 | && !specs->long_long_p |
98c3a782 JM |
4271 | && !specs->short_p |
4272 | && !specs->signed_p | |
4273 | && !specs->unsigned_p | |
4274 | && !specs->complex_p | |
3b53cddc | 4275 | && !specs->inline_p |
bbceee64 | 4276 | && !specs->noreturn_p |
3b53cddc JM |
4277 | && !specs->thread_p); |
4278 | return quals; | |
4279 | } | |
4280 | ||
c2255bc4 AH |
4281 | /* Construct an array declarator. LOC is the location of the |
4282 | beginning of the array (usually the opening brace). EXPR is the | |
4283 | expression inside [], or NULL_TREE. QUALS are the type qualifiers | |
4284 | inside the [] (to be applied to the pointer to which a parameter | |
4285 | array is converted). STATIC_P is true if "static" is inside the | |
4286 | [], false otherwise. VLA_UNSPEC_P is true if the array is [*], a | |
4287 | VLA of unspecified length which is nevertheless a complete type, | |
4288 | false otherwise. The field for the contained declarator is left to | |
4289 | be filled in by set_array_declarator_inner. */ | |
0e03329a | 4290 | |
f8893e47 | 4291 | struct c_declarator * |
c2255bc4 AH |
4292 | build_array_declarator (location_t loc, |
4293 | tree expr, struct c_declspecs *quals, bool static_p, | |
60919bce | 4294 | bool vla_unspec_p) |
0e03329a | 4295 | { |
f8893e47 JM |
4296 | struct c_declarator *declarator = XOBNEW (&parser_obstack, |
4297 | struct c_declarator); | |
c2255bc4 | 4298 | declarator->id_loc = loc; |
f8893e47 JM |
4299 | declarator->kind = cdk_array; |
4300 | declarator->declarator = 0; | |
4301 | declarator->u.array.dimen = expr; | |
3b53cddc JM |
4302 | if (quals) |
4303 | { | |
4304 | declarator->u.array.attrs = quals->attrs; | |
4305 | declarator->u.array.quals = quals_from_declspecs (quals); | |
4306 | } | |
4307 | else | |
4308 | { | |
4309 | declarator->u.array.attrs = NULL_TREE; | |
4310 | declarator->u.array.quals = 0; | |
4311 | } | |
f8893e47 JM |
4312 | declarator->u.array.static_p = static_p; |
4313 | declarator->u.array.vla_unspec_p = vla_unspec_p; | |
f3bede71 MP |
4314 | if (static_p || quals != NULL) |
4315 | pedwarn_c90 (loc, OPT_Wpedantic, | |
509c9d60 | 4316 | "ISO C90 does not support %<static%> or type " |
bda67431 | 4317 | "qualifiers in parameter array declarators"); |
f3bede71 MP |
4318 | if (vla_unspec_p) |
4319 | pedwarn_c90 (loc, OPT_Wpedantic, | |
509c9d60 | 4320 | "ISO C90 does not support %<[*]%> array declarators"); |
0e03329a | 4321 | if (vla_unspec_p) |
52ffd86e MS |
4322 | { |
4323 | if (!current_scope->parm_flag) | |
4324 | { | |
4325 | /* C99 6.7.5.2p4 */ | |
c2255bc4 AH |
4326 | error_at (loc, "%<[*]%> not allowed in other than " |
4327 | "function prototype scope"); | |
52ffd86e MS |
4328 | declarator->u.array.vla_unspec_p = false; |
4329 | return NULL; | |
4330 | } | |
4331 | current_scope->had_vla_unspec = true; | |
4332 | } | |
f8893e47 | 4333 | return declarator; |
0e03329a JM |
4334 | } |
4335 | ||
f8893e47 JM |
4336 | /* Set the contained declarator of an array declarator. DECL is the |
4337 | declarator, as constructed by build_array_declarator; INNER is what | |
6ac0194d | 4338 | appears on the left of the []. */ |
0e03329a | 4339 | |
f8893e47 JM |
4340 | struct c_declarator * |
4341 | set_array_declarator_inner (struct c_declarator *decl, | |
6ac0194d | 4342 | struct c_declarator *inner) |
0e03329a | 4343 | { |
f8893e47 | 4344 | decl->declarator = inner; |
0e03329a JM |
4345 | return decl; |
4346 | } | |
1f0f7ceb RS |
4347 | |
4348 | /* INIT is a constructor that forms DECL's initializer. If the final | |
4349 | element initializes a flexible array field, add the size of that | |
4350 | initializer to DECL's size. */ | |
4351 | ||
4352 | static void | |
4353 | add_flexible_array_elts_to_size (tree decl, tree init) | |
4354 | { | |
1f0f7ceb RS |
4355 | tree elt, type; |
4356 | ||
9771b263 | 4357 | if (vec_safe_is_empty (CONSTRUCTOR_ELTS (init))) |
1f0f7ceb RS |
4358 | return; |
4359 | ||
9771b263 | 4360 | elt = CONSTRUCTOR_ELTS (init)->last ().value; |
1f0f7ceb RS |
4361 | type = TREE_TYPE (elt); |
4362 | if (TREE_CODE (type) == ARRAY_TYPE | |
4363 | && TYPE_SIZE (type) == NULL_TREE | |
4364 | && TYPE_DOMAIN (type) != NULL_TREE | |
4365 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) == NULL_TREE) | |
4366 | { | |
4367 | complete_array_type (&type, elt, false); | |
4368 | DECL_SIZE (decl) | |
4369 | = size_binop (PLUS_EXPR, DECL_SIZE (decl), TYPE_SIZE (type)); | |
4370 | DECL_SIZE_UNIT (decl) | |
4371 | = size_binop (PLUS_EXPR, DECL_SIZE_UNIT (decl), TYPE_SIZE_UNIT (type)); | |
4372 | } | |
4373 | } | |
0e03329a | 4374 | \f |
928c19bb JM |
4375 | /* Decode a "typename", such as "int **", returning a ..._TYPE node. |
4376 | Set *EXPR, if EXPR not NULL, to any expression to be evaluated | |
4377 | before the type name, and set *EXPR_CONST_OPERANDS, if | |
4378 | EXPR_CONST_OPERANDS not NULL, to indicate whether the type name may | |
4379 | appear in a constant expression. */ | |
51e29401 RS |
4380 | |
4381 | tree | |
928c19bb JM |
4382 | groktypename (struct c_type_name *type_name, tree *expr, |
4383 | bool *expr_const_operands) | |
51e29401 | 4384 | { |
f8893e47 | 4385 | tree type; |
deb176fa | 4386 | tree attrs = type_name->specs->attrs; |
d3b4cd6f | 4387 | |
deb176fa | 4388 | type_name->specs->attrs = NULL_TREE; |
d3b4cd6f | 4389 | |
deb176fa | 4390 | type = grokdeclarator (type_name->declarator, type_name->specs, TYPENAME, |
928c19bb JM |
4391 | false, NULL, &attrs, expr, expr_const_operands, |
4392 | DEPRECATED_NORMAL); | |
d3b4cd6f AH |
4393 | |
4394 | /* Apply attributes. */ | |
f8893e47 | 4395 | decl_attributes (&type, attrs, 0); |
d3b4cd6f | 4396 | |
f8893e47 | 4397 | return type; |
51e29401 RS |
4398 | } |
4399 | ||
acf0174b JJ |
4400 | /* Wrapper for decl_attributes that adds some implicit attributes |
4401 | to VAR_DECLs or FUNCTION_DECLs. */ | |
4402 | ||
4403 | static tree | |
4404 | c_decl_attributes (tree *node, tree attributes, int flags) | |
4405 | { | |
4406 | /* Add implicit "omp declare target" attribute if requested. */ | |
4407 | if (current_omp_declare_target_attribute | |
4408 | && ((TREE_CODE (*node) == VAR_DECL && TREE_STATIC (*node)) | |
4409 | || TREE_CODE (*node) == FUNCTION_DECL)) | |
4410 | { | |
4411 | if (TREE_CODE (*node) == VAR_DECL | |
4412 | && ((DECL_CONTEXT (*node) | |
4413 | && TREE_CODE (DECL_CONTEXT (*node)) == FUNCTION_DECL) | |
4414 | || (current_function_decl && !DECL_EXTERNAL (*node)))) | |
4415 | error ("%q+D in block scope inside of declare target directive", | |
4416 | *node); | |
4417 | else if (TREE_CODE (*node) == VAR_DECL | |
b17a8b07 | 4418 | && !lang_hooks.types.omp_mappable_type (TREE_TYPE (*node))) |
acf0174b JJ |
4419 | error ("%q+D in declare target directive does not have mappable type", |
4420 | *node); | |
4421 | else | |
4422 | attributes = tree_cons (get_identifier ("omp declare target"), | |
4423 | NULL_TREE, attributes); | |
4424 | } | |
4425 | return decl_attributes (node, attributes, flags); | |
4426 | } | |
4427 | ||
4428 | ||
51e29401 RS |
4429 | /* Decode a declarator in an ordinary declaration or data definition. |
4430 | This is called as soon as the type information and variable name | |
4431 | have been parsed, before parsing the initializer if any. | |
4432 | Here we create the ..._DECL node, fill in its type, | |
4433 | and put it on the list of decls for the current context. | |
4434 | The ..._DECL node is returned as the value. | |
4435 | ||
4436 | Exception: for arrays where the length is not specified, | |
4437 | the type is left null, to be filled in by `finish_decl'. | |
4438 | ||
4439 | Function definitions do not come here; they go to start_function | |
4440 | instead. However, external and forward declarations of functions | |
4441 | do go through here. Structure field declarations are done by | |
4442 | grokfield and not through here. */ | |
4443 | ||
51e29401 | 4444 | tree |
deb176fa | 4445 | start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs, |
f8893e47 | 4446 | bool initialized, tree attributes) |
51e29401 | 4447 | { |
e23bd218 | 4448 | tree decl; |
b3694847 | 4449 | tree tem; |
928c19bb | 4450 | tree expr = NULL_TREE; |
0da300cd | 4451 | enum deprecated_states deprecated_state = DEPRECATED_NORMAL; |
35b1a6fa | 4452 | |
e23bd218 IR |
4453 | /* An object declared as __attribute__((deprecated)) suppresses |
4454 | warnings of uses of other deprecated items. */ | |
4455 | if (lookup_attribute ("deprecated", attributes)) | |
4456 | deprecated_state = DEPRECATED_SUPPRESS; | |
4457 | ||
4458 | decl = grokdeclarator (declarator, declspecs, | |
928c19bb | 4459 | NORMAL, initialized, NULL, &attributes, &expr, NULL, |
0da300cd | 4460 | deprecated_state); |
6f17bbcf JM |
4461 | if (!decl) |
4462 | return 0; | |
35b1a6fa | 4463 | |
928c19bb | 4464 | if (expr) |
0e0d82a7 | 4465 | add_stmt (fold_convert (void_type_node, expr)); |
928c19bb | 4466 | |
4003301d | 4467 | if (TREE_CODE (decl) != FUNCTION_DECL && MAIN_NAME_P (DECL_NAME (decl))) |
dee15844 | 4468 | warning (OPT_Wmain, "%q+D is usually a function", decl); |
b8705e61 | 4469 | |
51e29401 RS |
4470 | if (initialized) |
4471 | /* Is it valid for this decl to have an initializer at all? | |
4472 | If not, set INITIALIZED to zero, which will indirectly | |
f75fbaf7 | 4473 | tell 'finish_decl' to ignore the initializer once it is parsed. */ |
51e29401 RS |
4474 | switch (TREE_CODE (decl)) |
4475 | { | |
4476 | case TYPE_DECL: | |
bda67431 | 4477 | error ("typedef %qD is initialized (use __typeof__ instead)", decl); |
95f79357 | 4478 | initialized = 0; |
51e29401 RS |
4479 | break; |
4480 | ||
4481 | case FUNCTION_DECL: | |
bda67431 | 4482 | error ("function %qD is initialized like a variable", decl); |
51e29401 RS |
4483 | initialized = 0; |
4484 | break; | |
4485 | ||
4486 | case PARM_DECL: | |
4487 | /* DECL_INITIAL in a PARM_DECL is really DECL_ARG_TYPE. */ | |
bda67431 | 4488 | error ("parameter %qD is initialized", decl); |
51e29401 RS |
4489 | initialized = 0; |
4490 | break; | |
4491 | ||
4492 | default: | |
f75fbaf7 ZW |
4493 | /* Don't allow initializations for incomplete types except for |
4494 | arrays which might be completed by the initialization. */ | |
f4fce7ed | 4495 | |
f75fbaf7 ZW |
4496 | /* This can happen if the array size is an undefined macro. |
4497 | We already gave a warning, so we don't need another one. */ | |
f4fce7ed JW |
4498 | if (TREE_TYPE (decl) == error_mark_node) |
4499 | initialized = 0; | |
4500 | else if (COMPLETE_TYPE_P (TREE_TYPE (decl))) | |
51e29401 RS |
4501 | { |
4502 | /* A complete type is ok if size is fixed. */ | |
4503 | ||
4504 | if (TREE_CODE (TYPE_SIZE (TREE_TYPE (decl))) != INTEGER_CST | |
4505 | || C_DECL_VARIABLE_SIZE (decl)) | |
4506 | { | |
4507 | error ("variable-sized object may not be initialized"); | |
4508 | initialized = 0; | |
4509 | } | |
4510 | } | |
4511 | else if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE) | |
4512 | { | |
bda67431 | 4513 | error ("variable %qD has initializer but incomplete type", decl); |
51e29401 RS |
4514 | initialized = 0; |
4515 | } | |
ef787822 JM |
4516 | else if (C_DECL_VARIABLE_SIZE (decl)) |
4517 | { | |
4518 | /* Although C99 is unclear about whether incomplete arrays | |
4519 | of VLAs themselves count as VLAs, it does not make | |
4520 | sense to permit them to be initialized given that | |
4521 | ordinary VLAs may not be initialized. */ | |
4522 | error ("variable-sized object may not be initialized"); | |
4523 | initialized = 0; | |
4524 | } | |
51e29401 RS |
4525 | } |
4526 | ||
4527 | if (initialized) | |
4528 | { | |
f75fbaf7 | 4529 | if (current_scope == file_scope) |
51e29401 RS |
4530 | TREE_STATIC (decl) = 1; |
4531 | ||
f75fbaf7 | 4532 | /* Tell 'pushdecl' this is an initialized decl |
51e29401 | 4533 | even though we don't yet have the initializer expression. |
f75fbaf7 | 4534 | Also tell 'finish_decl' it may store the real initializer. */ |
51e29401 RS |
4535 | DECL_INITIAL (decl) = error_mark_node; |
4536 | } | |
4537 | ||
4538 | /* If this is a function declaration, write a record describing it to the | |
4539 | prototypes file (if requested). */ | |
4540 | ||
4541 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
f4da8dce | 4542 | gen_aux_info_record (decl, 0, 0, prototype_p (TREE_TYPE (decl))); |
51e29401 | 4543 | |
2786cbad JM |
4544 | /* ANSI specifies that a tentative definition which is not merged with |
4545 | a non-tentative definition behaves exactly like a definition with an | |
4546 | initializer equal to zero. (Section 3.7.2) | |
3d78f2e9 RH |
4547 | |
4548 | -fno-common gives strict ANSI behavior, though this tends to break | |
4549 | a large body of code that grew up without this rule. | |
4550 | ||
4551 | Thread-local variables are never common, since there's no entrenched | |
4552 | body of code to break, and it allows more efficient variable references | |
95bd1dd7 | 4553 | in the presence of dynamic linking. */ |
3d78f2e9 RH |
4554 | |
4555 | if (TREE_CODE (decl) == VAR_DECL | |
4556 | && !initialized | |
4557 | && TREE_PUBLIC (decl) | |
c2f7fa15 | 4558 | && !DECL_THREAD_LOCAL_P (decl) |
3d78f2e9 | 4559 | && !flag_no_common) |
2786cbad | 4560 | DECL_COMMON (decl) = 1; |
8615176a | 4561 | |
daa6d5ff | 4562 | /* Set attributes here so if duplicate decl, will have proper attributes. */ |
acf0174b | 4563 | c_decl_attributes (&decl, attributes, 0); |
daa6d5ff | 4564 | |
4eb7fd83 JJ |
4565 | /* Handle gnu_inline attribute. */ |
4566 | if (declspecs->inline_p | |
da1c7394 | 4567 | && !flag_gnu89_inline |
4eb7fd83 | 4568 | && TREE_CODE (decl) == FUNCTION_DECL |
6cf59865 JJ |
4569 | && (lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (decl)) |
4570 | || current_function_decl)) | |
4eb7fd83 JJ |
4571 | { |
4572 | if (declspecs->storage_class == csc_auto && current_scope != file_scope) | |
4573 | ; | |
4574 | else if (declspecs->storage_class != csc_static) | |
4575 | DECL_EXTERNAL (decl) = !DECL_EXTERNAL (decl); | |
4576 | } | |
4eb7fd83 | 4577 | |
61f71b34 DD |
4578 | if (TREE_CODE (decl) == FUNCTION_DECL |
4579 | && targetm.calls.promote_prototypes (TREE_TYPE (decl))) | |
4580 | { | |
f8893e47 | 4581 | struct c_declarator *ce = declarator; |
61f71b34 | 4582 | |
f8893e47 JM |
4583 | if (ce->kind == cdk_pointer) |
4584 | ce = declarator->declarator; | |
4585 | if (ce->kind == cdk_function) | |
61f71b34 | 4586 | { |
f8893e47 | 4587 | tree args = ce->u.arg_info->parms; |
910ad8de | 4588 | for (; args; args = DECL_CHAIN (args)) |
61f71b34 DD |
4589 | { |
4590 | tree type = TREE_TYPE (args); | |
1f4f60fc | 4591 | if (type && INTEGRAL_TYPE_P (type) |
61f71b34 | 4592 | && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) |
267bac10 | 4593 | DECL_ARG_TYPE (args) = c_type_promotes_to (type); |
61f71b34 DD |
4594 | } |
4595 | } | |
4596 | } | |
4597 | ||
9162542e AO |
4598 | if (TREE_CODE (decl) == FUNCTION_DECL |
4599 | && DECL_DECLARED_INLINE_P (decl) | |
4600 | && DECL_UNINLINABLE (decl) | |
4601 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl))) | |
dee15844 JM |
4602 | warning (OPT_Wattributes, "inline function %q+D given attribute noinline", |
4603 | decl); | |
9162542e | 4604 | |
71113fcd GK |
4605 | /* C99 6.7.4p3: An inline definition of a function with external |
4606 | linkage shall not contain a definition of a modifiable object | |
4607 | with static storage duration... */ | |
4608 | if (TREE_CODE (decl) == VAR_DECL | |
4609 | && current_scope != file_scope | |
4610 | && TREE_STATIC (decl) | |
1033ffa8 | 4611 | && !TREE_READONLY (decl) |
71113fcd GK |
4612 | && DECL_DECLARED_INLINE_P (current_function_decl) |
4613 | && DECL_EXTERNAL (current_function_decl)) | |
991d6621 JM |
4614 | record_inline_static (input_location, current_function_decl, |
4615 | decl, csi_modifiable); | |
71113fcd | 4616 | |
a6341d57 NP |
4617 | if (c_dialect_objc () |
4618 | && (TREE_CODE (decl) == VAR_DECL | |
4619 | || TREE_CODE (decl) == FUNCTION_DECL)) | |
4620 | objc_check_global_decl (decl); | |
4621 | ||
f8521984 | 4622 | /* Add this decl to the current scope. |
51e29401 RS |
4623 | TEM may equal DECL or it may be a previous decl of the same name. */ |
4624 | tem = pushdecl (decl); | |
4625 | ||
c1bbfd3c DJ |
4626 | if (initialized && DECL_EXTERNAL (tem)) |
4627 | { | |
4628 | DECL_EXTERNAL (tem) = 0; | |
4629 | TREE_STATIC (tem) = 1; | |
4630 | } | |
bbbcb2e1 | 4631 | |
51e29401 RS |
4632 | return tem; |
4633 | } | |
4634 | ||
51f4ec66 SZ |
4635 | /* Subroutine of finish_decl. TYPE is the type of an uninitialized object |
4636 | DECL or the non-array element type if DECL is an uninitialized array. | |
4637 | If that type has a const member, diagnose this. */ | |
4638 | ||
4639 | static void | |
4640 | diagnose_uninitialized_cst_member (tree decl, tree type) | |
4641 | { | |
4642 | tree field; | |
4643 | for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) | |
4644 | { | |
4645 | tree field_type; | |
4646 | if (TREE_CODE (field) != FIELD_DECL) | |
4647 | continue; | |
4648 | field_type = strip_array_types (TREE_TYPE (field)); | |
4649 | ||
4650 | if (TYPE_QUALS (field_type) & TYPE_QUAL_CONST) | |
4651 | { | |
4652 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
4653 | "uninitialized const member in %qT is invalid in C++", | |
4654 | strip_array_types (TREE_TYPE (decl))); | |
4655 | inform (DECL_SOURCE_LOCATION (field), "%qD should be initialized", field); | |
4656 | } | |
4657 | ||
4658 | if (TREE_CODE (field_type) == RECORD_TYPE | |
4659 | || TREE_CODE (field_type) == UNION_TYPE) | |
4660 | diagnose_uninitialized_cst_member (decl, field_type); | |
4661 | } | |
4662 | } | |
4663 | ||
51e29401 RS |
4664 | /* Finish processing of a declaration; |
4665 | install its initial value. | |
bbbbb16a | 4666 | If ORIGTYPE is not NULL_TREE, it is the original type of INIT. |
51e29401 | 4667 | If the length of an array type is not known before, |
c2255bc4 AH |
4668 | it must be determined now, from the initial value, or it is an error. |
4669 | ||
4670 | INIT_LOC is the location of the initial value. */ | |
51e29401 RS |
4671 | |
4672 | void | |
c2255bc4 AH |
4673 | finish_decl (tree decl, location_t init_loc, tree init, |
4674 | tree origtype, tree asmspec_tree) | |
51e29401 | 4675 | { |
aa24028d | 4676 | tree type; |
b5a7159f | 4677 | bool was_incomplete = (DECL_SIZE (decl) == 0); |
520a57c8 | 4678 | const char *asmspec = 0; |
51e29401 | 4679 | |
6d2f8887 | 4680 | /* If a name was specified, get the string. */ |
1ae57298 MM |
4681 | if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL) |
4682 | && DECL_FILE_SCOPE_P (decl)) | |
41c64394 | 4683 | asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree); |
51e29401 | 4684 | if (asmspec_tree) |
72f5a12b | 4685 | asmspec = TREE_STRING_POINTER (asmspec_tree); |
51e29401 | 4686 | |
b646ba3f DS |
4687 | if (TREE_CODE (decl) == VAR_DECL |
4688 | && TREE_STATIC (decl) | |
4689 | && global_bindings_p ()) | |
4690 | /* So decl is a global variable. Record the types it uses | |
4691 | so that we can decide later to emit debug info for them. */ | |
4692 | record_types_used_by_current_var_decl (decl); | |
4693 | ||
51e29401 | 4694 | /* If `start_decl' didn't like having an initialization, ignore it now. */ |
51e29401 RS |
4695 | if (init != 0 && DECL_INITIAL (decl) == 0) |
4696 | init = 0; | |
35b1a6fa | 4697 | |
51e29401 RS |
4698 | /* Don't crash if parm is initialized. */ |
4699 | if (TREE_CODE (decl) == PARM_DECL) | |
4700 | init = 0; | |
4701 | ||
4702 | if (init) | |
c2255bc4 | 4703 | store_init_value (init_loc, decl, init, origtype); |
51e29401 | 4704 | |
264fa2db | 4705 | if (c_dialect_objc () && (TREE_CODE (decl) == VAR_DECL |
0e6df31e GK |
4706 | || TREE_CODE (decl) == FUNCTION_DECL |
4707 | || TREE_CODE (decl) == FIELD_DECL)) | |
264fa2db ZL |
4708 | objc_check_decl (decl); |
4709 | ||
aa24028d AP |
4710 | type = TREE_TYPE (decl); |
4711 | ||
6614fd40 | 4712 | /* Deduce size of array from initialization, if not already known. */ |
51e29401 RS |
4713 | if (TREE_CODE (type) == ARRAY_TYPE |
4714 | && TYPE_DOMAIN (type) == 0 | |
4715 | && TREE_CODE (decl) != TYPE_DECL) | |
4716 | { | |
aab038d5 | 4717 | bool do_default |
51e29401 RS |
4718 | = (TREE_STATIC (decl) |
4719 | /* Even if pedantic, an external linkage array | |
4720 | may have incomplete type at first. */ | |
4721 | ? pedantic && !TREE_PUBLIC (decl) | |
1394aabd | 4722 | : !DECL_EXTERNAL (decl)); |
51e29401 | 4723 | int failure |
aab038d5 RH |
4724 | = complete_array_type (&TREE_TYPE (decl), DECL_INITIAL (decl), |
4725 | do_default); | |
51e29401 RS |
4726 | |
4727 | /* Get the completed type made by complete_array_type. */ | |
4728 | type = TREE_TYPE (decl); | |
4729 | ||
317a9ac3 | 4730 | switch (failure) |
51e29401 | 4731 | { |
317a9ac3 | 4732 | case 1: |
dee15844 | 4733 | error ("initializer fails to determine size of %q+D", decl); |
317a9ac3 RH |
4734 | break; |
4735 | ||
4736 | case 2: | |
51e29401 | 4737 | if (do_default) |
dee15844 | 4738 | error ("array size missing in %q+D", decl); |
b4892310 RS |
4739 | /* If a `static' var's size isn't known, |
4740 | make it extern as well as static, so it does not get | |
4741 | allocated. | |
4742 | If it is not `static', then do not mark extern; | |
4743 | finish_incomplete_decl will give it a default size | |
4744 | and it will get allocated. */ | |
3f75a254 | 4745 | else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl)) |
1394aabd | 4746 | DECL_EXTERNAL (decl) = 1; |
317a9ac3 RH |
4747 | break; |
4748 | ||
4749 | case 3: | |
dee15844 | 4750 | error ("zero or negative size array %q+D", decl); |
317a9ac3 RH |
4751 | break; |
4752 | ||
4753 | case 0: | |
4754 | /* For global variables, update the copy of the type that | |
4755 | exists in the binding. */ | |
4756 | if (TREE_PUBLIC (decl)) | |
4757 | { | |
4758 | struct c_binding *b_ext = I_SYMBOL_BINDING (DECL_NAME (decl)); | |
4759 | while (b_ext && !B_IN_EXTERNAL_SCOPE (b_ext)) | |
4760 | b_ext = b_ext->shadowed; | |
4761 | if (b_ext) | |
4762 | { | |
2609a0ce | 4763 | if (b_ext->u.type && comptypes (b_ext->u.type, type)) |
e1b7793c | 4764 | b_ext->u.type = composite_type (b_ext->u.type, type); |
317a9ac3 | 4765 | else |
e1b7793c | 4766 | b_ext->u.type = type; |
317a9ac3 RH |
4767 | } |
4768 | } | |
4769 | break; | |
4770 | ||
4771 | default: | |
4772 | gcc_unreachable (); | |
51e29401 | 4773 | } |
51e29401 | 4774 | |
aab038d5 RH |
4775 | if (DECL_INITIAL (decl)) |
4776 | TREE_TYPE (DECL_INITIAL (decl)) = type; | |
4777 | ||
156030d3 | 4778 | relayout_decl (decl); |
51e29401 RS |
4779 | } |
4780 | ||
4781 | if (TREE_CODE (decl) == VAR_DECL) | |
4782 | { | |
1f0f7ceb RS |
4783 | if (init && TREE_CODE (init) == CONSTRUCTOR) |
4784 | add_flexible_array_elts_to_size (decl, init); | |
4785 | ||
f4fce7ed JW |
4786 | if (DECL_SIZE (decl) == 0 && TREE_TYPE (decl) != error_mark_node |
4787 | && COMPLETE_TYPE_P (TREE_TYPE (decl))) | |
d575f110 RS |
4788 | layout_decl (decl, 0); |
4789 | ||
a7f64d52 | 4790 | if (DECL_SIZE (decl) == 0 |
f4fce7ed JW |
4791 | /* Don't give an error if we already gave one earlier. */ |
4792 | && TREE_TYPE (decl) != error_mark_node | |
a7f64d52 | 4793 | && (TREE_STATIC (decl) |
0e6df31e GK |
4794 | /* A static variable with an incomplete type |
4795 | is an error if it is initialized. | |
4796 | Also if it is not file scope. | |
4797 | Otherwise, let it through, but if it is not `extern' | |
4798 | then it may cause an error message later. */ | |
4799 | ? (DECL_INITIAL (decl) != 0 | |
4b1e44be | 4800 | || !DECL_FILE_SCOPE_P (decl)) |
0e6df31e GK |
4801 | /* An automatic variable with an incomplete type |
4802 | is an error. */ | |
4803 | : !DECL_EXTERNAL (decl))) | |
4804 | { | |
dee15844 | 4805 | error ("storage size of %q+D isn%'t known", decl); |
0e6df31e GK |
4806 | TREE_TYPE (decl) = error_mark_node; |
4807 | } | |
51e29401 | 4808 | |
1394aabd | 4809 | if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl)) |
90374cc2 | 4810 | && DECL_SIZE (decl) != 0) |
e681c5a1 RS |
4811 | { |
4812 | if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST) | |
4813 | constant_expression_warning (DECL_SIZE (decl)); | |
4814 | else | |
b97d8153 JJ |
4815 | { |
4816 | error ("storage size of %q+D isn%'t constant", decl); | |
4817 | TREE_TYPE (decl) = error_mark_node; | |
4818 | } | |
e681c5a1 | 4819 | } |
e9a25f70 | 4820 | |
6645c3fa | 4821 | if (TREE_USED (type)) |
ebfbbdc5 JJ |
4822 | { |
4823 | TREE_USED (decl) = 1; | |
4824 | DECL_READ_P (decl) = 1; | |
4825 | } | |
51e29401 RS |
4826 | } |
4827 | ||
9661b15f | 4828 | /* If this is a function and an assembler name is specified, reset DECL_RTL |
e79983f4 | 4829 | so we can give it its new name. Also, update builtin_decl if it |
9661b15f | 4830 | was a normal built-in. */ |
3c4afaa5 | 4831 | if (TREE_CODE (decl) == FUNCTION_DECL && asmspec) |
6645c3fa | 4832 | { |
9661b15f | 4833 | if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL) |
b482789c | 4834 | set_builtin_user_assembler_name (decl, asmspec); |
0e6df31e | 4835 | set_user_assembler_name (decl, asmspec); |
6645c3fa | 4836 | } |
3c4afaa5 | 4837 | |
d05cc98e | 4838 | /* If #pragma weak was used, mark the decl weak now. */ |
3693d46c | 4839 | maybe_apply_pragma_weak (decl); |
d05cc98e | 4840 | |
51e29401 RS |
4841 | /* Output the assembler code and/or RTL code for variables and functions, |
4842 | unless the type is an undefined structure or union. | |
4843 | If not, it will get done when the type is completed. */ | |
4844 | ||
4845 | if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL) | |
4846 | { | |
b9e75696 JM |
4847 | /* Determine the ELF visibility. */ |
4848 | if (TREE_PUBLIC (decl)) | |
4849 | c_determine_visibility (decl); | |
4850 | ||
0f7866e7 | 4851 | /* This is a no-op in c-lang.c or something real in objc-act.c. */ |
37fa72e9 | 4852 | if (c_dialect_objc ()) |
0f7866e7 | 4853 | objc_check_decl (decl); |
8f17b5c5 | 4854 | |
c22cacf3 | 4855 | if (asmspec) |
0e6df31e GK |
4856 | { |
4857 | /* If this is not a static variable, issue a warning. | |
4858 | It doesn't make any sense to give an ASMSPEC for an | |
4859 | ordinary, non-register local variable. Historically, | |
4860 | GCC has accepted -- but ignored -- the ASMSPEC in | |
4861 | this case. */ | |
3f75a254 | 4862 | if (!DECL_FILE_SCOPE_P (decl) |
0e6df31e GK |
4863 | && TREE_CODE (decl) == VAR_DECL |
4864 | && !C_DECL_REGISTER (decl) | |
4865 | && !TREE_STATIC (decl)) | |
dee15844 JM |
4866 | warning (0, "ignoring asm-specifier for non-static local " |
4867 | "variable %q+D", decl); | |
0e6df31e GK |
4868 | else |
4869 | set_user_assembler_name (decl, asmspec); | |
4870 | } | |
c22cacf3 | 4871 | |
4b1e44be | 4872 | if (DECL_FILE_SCOPE_P (decl)) |
8cf8d8a2 JM |
4873 | { |
4874 | if (DECL_INITIAL (decl) == NULL_TREE | |
4875 | || DECL_INITIAL (decl) == error_mark_node) | |
4876 | /* Don't output anything | |
4877 | when a tentative file-scope definition is seen. | |
4878 | But at end of compilation, do output code for them. */ | |
4879 | DECL_DEFER_OUTPUT (decl) = 1; | |
6d6c9525 RG |
4880 | if (asmspec && C_DECL_REGISTER (decl)) |
4881 | DECL_HARD_REGISTER (decl) = 1; | |
0e6df31e | 4882 | rest_of_decl_compilation (decl, true, 0); |
8cf8d8a2 | 4883 | } |
8f17b5c5 MM |
4884 | else |
4885 | { | |
0e6df31e GK |
4886 | /* In conjunction with an ASMSPEC, the `register' |
4887 | keyword indicates that we should place the variable | |
4888 | in a particular register. */ | |
4889 | if (asmspec && C_DECL_REGISTER (decl)) | |
3645c4dc | 4890 | { |
0e6df31e GK |
4891 | DECL_HARD_REGISTER (decl) = 1; |
4892 | /* This cannot be done for a structure with volatile | |
4893 | fields, on which DECL_REGISTER will have been | |
4894 | reset. */ | |
4895 | if (!DECL_REGISTER (decl)) | |
4896 | error ("cannot put object with volatile field into register"); | |
3645c4dc | 4897 | } |
0adc3c19 | 4898 | |
c0a4369a | 4899 | if (TREE_CODE (decl) != FUNCTION_DECL) |
174283a3 RH |
4900 | { |
4901 | /* If we're building a variable sized type, and we might be | |
4902 | reachable other than via the top of the current binding | |
4903 | level, then create a new BIND_EXPR so that we deallocate | |
4904 | the object at the right time. */ | |
4905 | /* Note that DECL_SIZE can be null due to errors. */ | |
4906 | if (DECL_SIZE (decl) | |
4907 | && !TREE_CONSTANT (DECL_SIZE (decl)) | |
4908 | && STATEMENT_LIST_HAS_LABEL (cur_stmt_list)) | |
4909 | { | |
4910 | tree bind; | |
53fb4de3 | 4911 | bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, NULL); |
174283a3 RH |
4912 | TREE_SIDE_EFFECTS (bind) = 1; |
4913 | add_stmt (bind); | |
4914 | BIND_EXPR_BODY (bind) = push_stmt_list (); | |
4915 | } | |
c2255bc4 AH |
4916 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), |
4917 | DECL_EXPR, decl)); | |
174283a3 | 4918 | } |
8f17b5c5 | 4919 | } |
c22cacf3 | 4920 | |
4dd7201e | 4921 | |
4b1e44be | 4922 | if (!DECL_FILE_SCOPE_P (decl)) |
51e29401 RS |
4923 | { |
4924 | /* Recompute the RTL of a local array now | |
4925 | if it used to be an incomplete type. */ | |
4926 | if (was_incomplete | |
3f75a254 | 4927 | && !TREE_STATIC (decl) && !DECL_EXTERNAL (decl)) |
51e29401 RS |
4928 | { |
4929 | /* If we used it already as memory, it must stay in memory. */ | |
4930 | TREE_ADDRESSABLE (decl) = TREE_USED (decl); | |
4931 | /* If it's still incomplete now, no init will save it. */ | |
4932 | if (DECL_SIZE (decl) == 0) | |
4933 | DECL_INITIAL (decl) = 0; | |
51e29401 | 4934 | } |
51e29401 RS |
4935 | } |
4936 | } | |
4937 | ||
4938 | if (TREE_CODE (decl) == TYPE_DECL) | |
1c9766da RK |
4939 | { |
4940 | if (!DECL_FILE_SCOPE_P (decl) | |
5377d5ba | 4941 | && variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) |
c2255bc4 | 4942 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl)); |
1c9766da | 4943 | |
0e6df31e | 4944 | rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl), 0); |
1c9766da | 4945 | } |
51e29401 | 4946 | |
0bfa5f65 RH |
4947 | /* Install a cleanup (aka destructor) if one was given. */ |
4948 | if (TREE_CODE (decl) == VAR_DECL && !TREE_STATIC (decl)) | |
4949 | { | |
4950 | tree attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl)); | |
4951 | if (attr) | |
4952 | { | |
0bfa5f65 RH |
4953 | tree cleanup_id = TREE_VALUE (TREE_VALUE (attr)); |
4954 | tree cleanup_decl = lookup_name (cleanup_id); | |
4955 | tree cleanup; | |
9771b263 | 4956 | vec<tree, va_gc> *v; |
0bfa5f65 RH |
4957 | |
4958 | /* Build "cleanup(&decl)" for the destructor. */ | |
c9f9eb5d | 4959 | cleanup = build_unary_op (input_location, ADDR_EXPR, decl, 0); |
9771b263 DN |
4960 | vec_alloc (v, 1); |
4961 | v->quick_push (cleanup); | |
8edbfaa6 JJ |
4962 | cleanup = c_build_function_call_vec (DECL_SOURCE_LOCATION (decl), |
4963 | vNULL, cleanup_decl, v, NULL); | |
9771b263 | 4964 | vec_free (v); |
0bfa5f65 RH |
4965 | |
4966 | /* Don't warn about decl unused; the cleanup uses it. */ | |
4967 | TREE_USED (decl) = 1; | |
325c3691 | 4968 | TREE_USED (cleanup_decl) = 1; |
ebfbbdc5 | 4969 | DECL_READ_P (decl) = 1; |
0bfa5f65 | 4970 | |
325c3691 | 4971 | push_cleanup (decl, cleanup, false); |
0bfa5f65 RH |
4972 | } |
4973 | } | |
642324bb ILT |
4974 | |
4975 | if (warn_cxx_compat | |
4976 | && TREE_CODE (decl) == VAR_DECL | |
642324bb ILT |
4977 | && !DECL_EXTERNAL (decl) |
4978 | && DECL_INITIAL (decl) == NULL_TREE) | |
51f4ec66 SZ |
4979 | { |
4980 | type = strip_array_types (type); | |
4981 | if (TREE_READONLY (decl)) | |
4982 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
4983 | "uninitialized const %qD is invalid in C++", decl); | |
4984 | else if ((TREE_CODE (type) == RECORD_TYPE | |
4985 | || TREE_CODE (type) == UNION_TYPE) | |
4986 | && C_TYPE_FIELDS_READONLY (type)) | |
4987 | diagnose_uninitialized_cst_member (decl, type); | |
4988 | } | |
4309e92c RG |
4989 | |
4990 | invoke_plugin_callbacks (PLUGIN_FINISH_DECL, decl); | |
51e29401 RS |
4991 | } |
4992 | ||
a04a722b JM |
4993 | /* Given a parsed parameter declaration, decode it into a PARM_DECL. |
4994 | EXPR is NULL or a pointer to an expression that needs to be | |
4995 | evaluated for the side effects of array size expressions in the | |
4996 | parameters. */ | |
c34be55e ZL |
4997 | |
4998 | tree | |
a04a722b | 4999 | grokparm (const struct c_parm *parm, tree *expr) |
c34be55e | 5000 | { |
b9baeecd | 5001 | tree attrs = parm->attrs; |
f8893e47 | 5002 | tree decl = grokdeclarator (parm->declarator, parm->specs, PARM, false, |
a04a722b | 5003 | NULL, &attrs, expr, NULL, DEPRECATED_NORMAL); |
c34be55e | 5004 | |
b9baeecd | 5005 | decl_attributes (&decl, attrs, 0); |
c34be55e ZL |
5006 | |
5007 | return decl; | |
5008 | } | |
5009 | ||
55d54003 | 5010 | /* Given a parsed parameter declaration, decode it into a PARM_DECL |
a04a722b JM |
5011 | and push that on the current scope. EXPR is a pointer to an |
5012 | expression that needs to be evaluated for the side effects of array | |
5013 | size expressions in the parameters. */ | |
51e29401 RS |
5014 | |
5015 | void | |
a04a722b | 5016 | push_parm_decl (const struct c_parm *parm, tree *expr) |
51e29401 | 5017 | { |
b9baeecd | 5018 | tree attrs = parm->attrs; |
6cc902a1 | 5019 | tree decl; |
14077d68 | 5020 | |
0da300cd | 5021 | decl = grokdeclarator (parm->declarator, parm->specs, PARM, false, NULL, |
a04a722b | 5022 | &attrs, expr, NULL, DEPRECATED_NORMAL); |
b9baeecd | 5023 | decl_attributes (&decl, attrs, 0); |
6a5ed5bf | 5024 | |
51e29401 RS |
5025 | decl = pushdecl (decl); |
5026 | ||
c2255bc4 | 5027 | finish_decl (decl, input_location, NULL_TREE, NULL_TREE, NULL_TREE); |
51e29401 RS |
5028 | } |
5029 | ||
f75fbaf7 | 5030 | /* Mark all the parameter declarations to date as forward decls. |
f91f41b2 | 5031 | Also diagnose use of this extension. */ |
51e29401 RS |
5032 | |
5033 | void | |
55d54003 | 5034 | mark_forward_parm_decls (void) |
51e29401 | 5035 | { |
f75fbaf7 | 5036 | struct c_binding *b; |
55d54003 ZW |
5037 | |
5038 | if (pedantic && !current_scope->warned_forward_parm_decls) | |
5039 | { | |
c1771a20 | 5040 | pedwarn (input_location, OPT_Wpedantic, |
509c9d60 | 5041 | "ISO C forbids forward parameter declarations"); |
55d54003 ZW |
5042 | current_scope->warned_forward_parm_decls = true; |
5043 | } | |
5044 | ||
f75fbaf7 ZW |
5045 | for (b = current_scope->bindings; b; b = b->prev) |
5046 | if (TREE_CODE (b->decl) == PARM_DECL) | |
5047 | TREE_ASM_WRITTEN (b->decl) = 1; | |
51e29401 RS |
5048 | } |
5049 | \f | |
db3acfa5 JM |
5050 | /* Build a COMPOUND_LITERAL_EXPR. TYPE is the type given in the compound |
5051 | literal, which may be an incomplete array type completed by the | |
c2255bc4 | 5052 | initializer; INIT is a CONSTRUCTOR at LOC that initializes the compound |
928c19bb JM |
5053 | literal. NON_CONST is true if the initializers contain something |
5054 | that cannot occur in a constant expression. */ | |
db3acfa5 JM |
5055 | |
5056 | tree | |
c2255bc4 | 5057 | build_compound_literal (location_t loc, tree type, tree init, bool non_const) |
db3acfa5 JM |
5058 | { |
5059 | /* We do not use start_decl here because we have a type, not a declarator; | |
5060 | and do not use finish_decl because the decl should be stored inside | |
350fae66 | 5061 | the COMPOUND_LITERAL_EXPR rather than added elsewhere as a DECL_EXPR. */ |
ef787822 | 5062 | tree decl; |
db3acfa5 | 5063 | tree complit; |
8d37a5c0 | 5064 | tree stmt; |
ef787822 | 5065 | |
3e23fb2e AP |
5066 | if (type == error_mark_node |
5067 | || init == error_mark_node) | |
ef787822 JM |
5068 | return error_mark_node; |
5069 | ||
c2255bc4 | 5070 | decl = build_decl (loc, VAR_DECL, NULL_TREE, type); |
db3acfa5 JM |
5071 | DECL_EXTERNAL (decl) = 0; |
5072 | TREE_PUBLIC (decl) = 0; | |
f75fbaf7 | 5073 | TREE_STATIC (decl) = (current_scope == file_scope); |
db3acfa5 JM |
5074 | DECL_CONTEXT (decl) = current_function_decl; |
5075 | TREE_USED (decl) = 1; | |
ebfbbdc5 | 5076 | DECL_READ_P (decl) = 1; |
db3acfa5 | 5077 | TREE_TYPE (decl) = type; |
a845a7f5 ILT |
5078 | TREE_READONLY (decl) = (TYPE_READONLY (type) |
5079 | || (TREE_CODE (type) == ARRAY_TYPE | |
5080 | && TYPE_READONLY (TREE_TYPE (type)))); | |
c2255bc4 | 5081 | store_init_value (loc, decl, init, NULL_TREE); |
db3acfa5 JM |
5082 | |
5083 | if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type)) | |
5084 | { | |
aab038d5 RH |
5085 | int failure = complete_array_type (&TREE_TYPE (decl), |
5086 | DECL_INITIAL (decl), true); | |
da0fc454 MP |
5087 | /* If complete_array_type returns 3, it means that the |
5088 | initial value of the compound literal is empty. Allow it. */ | |
5089 | gcc_assert (failure == 0 || failure == 3); | |
aab038d5 RH |
5090 | |
5091 | type = TREE_TYPE (decl); | |
5092 | TREE_TYPE (DECL_INITIAL (decl)) = type; | |
db3acfa5 JM |
5093 | } |
5094 | ||
db3acfa5 | 5095 | if (type == error_mark_node || !COMPLETE_TYPE_P (type)) |
cce50861 JJ |
5096 | { |
5097 | c_incomplete_type_error (NULL_TREE, type); | |
5098 | return error_mark_node; | |
5099 | } | |
db3acfa5 | 5100 | |
c2255bc4 | 5101 | stmt = build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl); |
aab038d5 | 5102 | complit = build1 (COMPOUND_LITERAL_EXPR, type, stmt); |
db3acfa5 JM |
5103 | TREE_SIDE_EFFECTS (complit) = 1; |
5104 | ||
5105 | layout_decl (decl, 0); | |
5106 | ||
5107 | if (TREE_STATIC (decl)) | |
5108 | { | |
3b2db49f MM |
5109 | /* This decl needs a name for the assembler output. */ |
5110 | set_compound_literal_name (decl); | |
cf3c4f56 JJ |
5111 | DECL_DEFER_OUTPUT (decl) = 1; |
5112 | DECL_COMDAT (decl) = 1; | |
5113 | DECL_ARTIFICIAL (decl) = 1; | |
78e0d62b | 5114 | DECL_IGNORED_P (decl) = 1; |
cf3c4f56 | 5115 | pushdecl (decl); |
0e6df31e | 5116 | rest_of_decl_compilation (decl, 1, 0); |
db3acfa5 JM |
5117 | } |
5118 | ||
928c19bb JM |
5119 | if (non_const) |
5120 | { | |
5121 | complit = build2 (C_MAYBE_CONST_EXPR, type, NULL, complit); | |
5122 | C_MAYBE_CONST_EXPR_NON_CONST (complit) = 1; | |
5123 | } | |
5124 | ||
db3acfa5 JM |
5125 | return complit; |
5126 | } | |
24b97832 ILT |
5127 | |
5128 | /* Check the type of a compound literal. Here we just check that it | |
5129 | is valid for C++. */ | |
5130 | ||
5131 | void | |
c2255bc4 | 5132 | check_compound_literal_type (location_t loc, struct c_type_name *type_name) |
24b97832 | 5133 | { |
9e5b2115 PB |
5134 | if (warn_cxx_compat |
5135 | && (type_name->specs->typespec_kind == ctsk_tagdef | |
5136 | || type_name->specs->typespec_kind == ctsk_tagfirstref)) | |
24b97832 ILT |
5137 | warning_at (loc, OPT_Wc___compat, |
5138 | "defining a type in a compound literal is invalid in C++"); | |
5139 | } | |
db3acfa5 | 5140 | \f |
2984fe64 JM |
5141 | /* Determine whether TYPE is a structure with a flexible array member, |
5142 | or a union containing such a structure (possibly recursively). */ | |
5143 | ||
5144 | static bool | |
35b1a6fa | 5145 | flexible_array_type_p (tree type) |
2984fe64 JM |
5146 | { |
5147 | tree x; | |
5148 | switch (TREE_CODE (type)) | |
5149 | { | |
5150 | case RECORD_TYPE: | |
5151 | x = TYPE_FIELDS (type); | |
5152 | if (x == NULL_TREE) | |
5153 | return false; | |
910ad8de NF |
5154 | while (DECL_CHAIN (x) != NULL_TREE) |
5155 | x = DECL_CHAIN (x); | |
2984fe64 JM |
5156 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE |
5157 | && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE | |
5158 | && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE | |
5159 | && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE) | |
5160 | return true; | |
5161 | return false; | |
5162 | case UNION_TYPE: | |
910ad8de | 5163 | for (x = TYPE_FIELDS (type); x != NULL_TREE; x = DECL_CHAIN (x)) |
2984fe64 JM |
5164 | { |
5165 | if (flexible_array_type_p (TREE_TYPE (x))) | |
5166 | return true; | |
5167 | } | |
5168 | return false; | |
5169 | default: | |
5170 | return false; | |
5171 | } | |
5172 | } | |
5173 | \f | |
2ff7cce4 JM |
5174 | /* Performs sanity checks on the TYPE and WIDTH of the bit-field NAME, |
5175 | replacing with appropriate values if they are invalid. */ | |
5176 | static void | |
88388a52 | 5177 | check_bitfield_type_and_width (tree *type, tree *width, tree orig_name) |
2ff7cce4 JM |
5178 | { |
5179 | tree type_mv; | |
5180 | unsigned int max_width; | |
5181 | unsigned HOST_WIDE_INT w; | |
88388a52 JM |
5182 | const char *name = (orig_name |
5183 | ? identifier_to_locale (IDENTIFIER_POINTER (orig_name)) | |
5184 | : _("<anonymous>")); | |
2ff7cce4 | 5185 | |
2ff7cce4 JM |
5186 | /* Detect and ignore out of range field width and process valid |
5187 | field widths. */ | |
d3ae6c2a | 5188 | if (!INTEGRAL_TYPE_P (TREE_TYPE (*width))) |
2ff7cce4 | 5189 | { |
bda67431 | 5190 | error ("bit-field %qs width not an integer constant", name); |
2ff7cce4 JM |
5191 | *width = integer_one_node; |
5192 | } | |
5193 | else | |
5194 | { | |
d3ae6c2a JM |
5195 | if (TREE_CODE (*width) != INTEGER_CST) |
5196 | { | |
5197 | *width = c_fully_fold (*width, false, NULL); | |
5198 | if (TREE_CODE (*width) == INTEGER_CST) | |
c1771a20 | 5199 | pedwarn (input_location, OPT_Wpedantic, |
d3ae6c2a JM |
5200 | "bit-field %qs width not an integer constant expression", |
5201 | name); | |
5202 | } | |
5203 | if (TREE_CODE (*width) != INTEGER_CST) | |
5204 | { | |
5205 | error ("bit-field %qs width not an integer constant", name); | |
5206 | *width = integer_one_node; | |
5207 | } | |
2ff7cce4 JM |
5208 | constant_expression_warning (*width); |
5209 | if (tree_int_cst_sgn (*width) < 0) | |
5210 | { | |
bda67431 | 5211 | error ("negative width in bit-field %qs", name); |
2ff7cce4 JM |
5212 | *width = integer_one_node; |
5213 | } | |
5214 | else if (integer_zerop (*width) && orig_name) | |
5215 | { | |
bda67431 | 5216 | error ("zero width for bit-field %qs", name); |
2ff7cce4 JM |
5217 | *width = integer_one_node; |
5218 | } | |
5219 | } | |
5220 | ||
5221 | /* Detect invalid bit-field type. */ | |
5222 | if (TREE_CODE (*type) != INTEGER_TYPE | |
5223 | && TREE_CODE (*type) != BOOLEAN_TYPE | |
5224 | && TREE_CODE (*type) != ENUMERAL_TYPE) | |
5225 | { | |
bda67431 | 5226 | error ("bit-field %qs has invalid type", name); |
2ff7cce4 JM |
5227 | *type = unsigned_type_node; |
5228 | } | |
5229 | ||
5230 | type_mv = TYPE_MAIN_VARIANT (*type); | |
8400e75e | 5231 | if (!in_system_header_at (input_location) |
2ff7cce4 JM |
5232 | && type_mv != integer_type_node |
5233 | && type_mv != unsigned_type_node | |
f3bede71 MP |
5234 | && type_mv != boolean_type_node) |
5235 | pedwarn_c90 (input_location, OPT_Wpedantic, | |
5236 | "type of bit-field %qs is a GCC extension", name); | |
2ff7cce4 | 5237 | |
02668aba | 5238 | max_width = TYPE_PRECISION (*type); |
2ff7cce4 JM |
5239 | |
5240 | if (0 < compare_tree_int (*width, max_width)) | |
5241 | { | |
bda67431 | 5242 | error ("width of %qs exceeds its type", name); |
2ff7cce4 | 5243 | w = max_width; |
c62c040f | 5244 | *width = build_int_cst (integer_type_node, w); |
2ff7cce4 JM |
5245 | } |
5246 | else | |
ae7e9ddd | 5247 | w = tree_to_uhwi (*width); |
2ff7cce4 | 5248 | |
6de9cd9a DN |
5249 | if (TREE_CODE (*type) == ENUMERAL_TYPE) |
5250 | { | |
5251 | struct lang_type *lt = TYPE_LANG_SPECIFIC (*type); | |
118a3a8b | 5252 | if (!lt |
807e902e KZ |
5253 | || w < tree_int_cst_min_precision (lt->enum_min, TYPE_SIGN (*type)) |
5254 | || w < tree_int_cst_min_precision (lt->enum_max, TYPE_SIGN (*type))) | |
d4ee4d25 | 5255 | warning (0, "%qs is narrower than values of its type", name); |
6de9cd9a | 5256 | } |
2ff7cce4 | 5257 | } |
0b359b01 | 5258 | |
2ff7cce4 | 5259 | \f |
50d50fc7 SP |
5260 | |
5261 | /* Print warning about variable length array if necessary. */ | |
5262 | ||
5263 | static void | |
88388a52 | 5264 | warn_variable_length_array (tree name, tree size) |
50d50fc7 | 5265 | { |
177cce46 | 5266 | if (TREE_CONSTANT (size)) |
50d50fc7 | 5267 | { |
f3bede71 | 5268 | if (name) |
177cce46 | 5269 | pedwarn_c90 (input_location, OPT_Wvla, |
88388a52 | 5270 | "ISO C90 forbids array %qE whose size " |
f3bede71 | 5271 | "can%'t be evaluated", name); |
50d50fc7 | 5272 | else |
177cce46 | 5273 | pedwarn_c90 (input_location, OPT_Wvla, "ISO C90 forbids array " |
f3bede71 | 5274 | "whose size can%'t be evaluated"); |
50d50fc7 | 5275 | } |
f3bede71 | 5276 | else |
50d50fc7 | 5277 | { |
f3bede71 | 5278 | if (name) |
177cce46 | 5279 | pedwarn_c90 (input_location, OPT_Wvla, |
f3bede71 | 5280 | "ISO C90 forbids variable length array %qE", name); |
50d50fc7 | 5281 | else |
177cce46 | 5282 | pedwarn_c90 (input_location, OPT_Wvla, "ISO C90 forbids variable " |
f3bede71 | 5283 | "length array"); |
50d50fc7 SP |
5284 | } |
5285 | } | |
5286 | ||
35aff4fb MP |
5287 | /* Print warning about defaulting to int if necessary. */ |
5288 | ||
5289 | static void | |
5290 | warn_defaults_to (location_t location, int opt, const char *gmsgid, ...) | |
5291 | { | |
5292 | diagnostic_info diagnostic; | |
5293 | va_list ap; | |
5294 | ||
5295 | va_start (ap, gmsgid); | |
5296 | diagnostic_set_info (&diagnostic, gmsgid, &ap, location, | |
5297 | flag_isoc99 ? DK_PEDWARN : DK_WARNING); | |
5298 | diagnostic.option_index = opt; | |
5299 | report_diagnostic (&diagnostic); | |
5300 | va_end (ap); | |
5301 | } | |
5302 | ||
51e29401 RS |
5303 | /* Given declspecs and a declarator, |
5304 | determine the name and type of the object declared | |
5305 | and construct a ..._DECL node for it. | |
5306 | (In one case we can return a ..._TYPE node instead. | |
5307 | For invalid input we sometimes return 0.) | |
5308 | ||
deb176fa | 5309 | DECLSPECS is a c_declspecs structure for the declaration specifiers. |
51e29401 RS |
5310 | |
5311 | DECL_CONTEXT says which syntactic context this declaration is in: | |
5312 | NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL. | |
5313 | FUNCDEF for a function definition. Like NORMAL but a few different | |
5314 | error messages in each case. Return value may be zero meaning | |
5315 | this definition is too screwy to try to parse. | |
5316 | PARM for a parameter declaration (either within a function prototype | |
5317 | or before a function body). Make a PARM_DECL, or return void_type_node. | |
5318 | TYPENAME if for a typename (in a cast or sizeof). | |
5319 | Don't make a DECL node; just return the ..._TYPE node. | |
5320 | FIELD for a struct or union field; make a FIELD_DECL. | |
60919bce | 5321 | INITIALIZED is true if the decl has an initializer. |
2ff7cce4 JM |
5322 | WIDTH is non-NULL for bit-fields, and is a pointer to an INTEGER_CST node |
5323 | representing the width of the bit-field. | |
b9baeecd RS |
5324 | DECL_ATTRS points to the list of attributes that should be added to this |
5325 | decl. Any nested attributes that belong on the decl itself will be | |
5326 | added to this list. | |
928c19bb JM |
5327 | If EXPR is not NULL, any expressions that need to be evaluated as |
5328 | part of evaluating variably modified types will be stored in *EXPR. | |
5329 | If EXPR_CONST_OPERANDS is not NULL, *EXPR_CONST_OPERANDS will be | |
5330 | set to indicate whether operands in *EXPR can be used in constant | |
5331 | expressions. | |
0da300cd TT |
5332 | DEPRECATED_STATE is a deprecated_states value indicating whether |
5333 | deprecation warnings should be suppressed. | |
51e29401 RS |
5334 | |
5335 | In the TYPENAME case, DECLARATOR is really an absolute declarator. | |
5336 | It may also be so in the PARM case, for a prototype where the | |
5337 | argument type is specified but not the name. | |
5338 | ||
5339 | This function is where the complicated C meanings of `static' | |
929f3671 | 5340 | and `extern' are interpreted. */ |
51e29401 RS |
5341 | |
5342 | static tree | |
deb176fa JM |
5343 | grokdeclarator (const struct c_declarator *declarator, |
5344 | struct c_declspecs *declspecs, | |
0da300cd | 5345 | enum decl_context decl_context, bool initialized, tree *width, |
928c19bb JM |
5346 | tree *decl_attrs, tree *expr, bool *expr_const_operands, |
5347 | enum deprecated_states deprecated_state) | |
51e29401 | 5348 | { |
deb176fa | 5349 | tree type = declspecs->type; |
9a26d6ee JM |
5350 | bool threadp = declspecs->thread_p; |
5351 | enum c_storage_class storage_class = declspecs->storage_class; | |
51e29401 | 5352 | int constp; |
3932261a | 5353 | int restrictp; |
51e29401 | 5354 | int volatilep; |
267bac10 | 5355 | int atomicp; |
3932261a | 5356 | int type_quals = TYPE_UNQUALIFIED; |
88388a52 | 5357 | tree name = NULL_TREE; |
52ffd86e | 5358 | bool funcdef_flag = false; |
f8893e47 | 5359 | bool funcdef_syntax = false; |
f9551830 | 5360 | bool size_varies = false; |
98c3a782 | 5361 | tree decl_attr = declspecs->decl_attr; |
3b53cddc JM |
5362 | int array_ptr_quals = TYPE_UNQUALIFIED; |
5363 | tree array_ptr_attrs = NULL_TREE; | |
0e03329a | 5364 | int array_parm_static = 0; |
52ffd86e | 5365 | bool array_parm_vla_unspec_p = false; |
91d231cb | 5366 | tree returned_attrs = NULL_TREE; |
2ff7cce4 | 5367 | bool bitfield = width != NULL; |
85b58ca5 | 5368 | tree element_type; |
f8893e47 | 5369 | struct c_arg_info *arg_info = 0; |
36c5e70a | 5370 | addr_space_t as1, as2, address_space; |
c2255bc4 | 5371 | location_t loc = UNKNOWN_LOCATION; |
40449a90 | 5372 | const char *errmsg; |
928c19bb JM |
5373 | tree expr_dummy; |
5374 | bool expr_const_operands_dummy; | |
411cdbd8 | 5375 | enum c_declarator_kind first_non_attr_kind; |
d19fa6b5 | 5376 | unsigned int alignas_align = 0; |
928c19bb | 5377 | |
29ce73cb PB |
5378 | if (TREE_CODE (type) == ERROR_MARK) |
5379 | return error_mark_node; | |
928c19bb JM |
5380 | if (expr == NULL) |
5381 | expr = &expr_dummy; | |
5382 | if (expr_const_operands == NULL) | |
5383 | expr_const_operands = &expr_const_operands_dummy; | |
5384 | ||
5385 | *expr = declspecs->expr; | |
5386 | *expr_const_operands = declspecs->expr_const_operands; | |
51e29401 RS |
5387 | |
5388 | if (decl_context == FUNCDEF) | |
52ffd86e | 5389 | funcdef_flag = true, decl_context = NORMAL; |
51e29401 | 5390 | |
51e29401 | 5391 | /* Look inside a declarator for the name being declared |
88388a52 | 5392 | and get it as an IDENTIFIER_NODE, for an error message. */ |
51e29401 | 5393 | { |
f8893e47 | 5394 | const struct c_declarator *decl = declarator; |
51e29401 | 5395 | |
411cdbd8 | 5396 | first_non_attr_kind = cdk_attrs; |
51e29401 | 5397 | while (decl) |
f8893e47 | 5398 | switch (decl->kind) |
51e29401 | 5399 | { |
f8893e47 | 5400 | case cdk_array: |
c2255bc4 AH |
5401 | loc = decl->id_loc; |
5402 | /* FALL THRU. */ | |
5403 | ||
5404 | case cdk_function: | |
f8893e47 JM |
5405 | case cdk_pointer: |
5406 | funcdef_syntax = (decl->kind == cdk_function); | |
5407 | decl = decl->declarator; | |
411cdbd8 RG |
5408 | if (first_non_attr_kind == cdk_attrs) |
5409 | first_non_attr_kind = decl->kind; | |
51e29401 RS |
5410 | break; |
5411 | ||
f8893e47 JM |
5412 | case cdk_attrs: |
5413 | decl = decl->declarator; | |
91d231cb JM |
5414 | break; |
5415 | ||
f8893e47 | 5416 | case cdk_id: |
c2255bc4 | 5417 | loc = decl->id_loc; |
f8893e47 | 5418 | if (decl->u.id) |
88388a52 | 5419 | name = decl->u.id; |
411cdbd8 RG |
5420 | if (first_non_attr_kind == cdk_attrs) |
5421 | first_non_attr_kind = decl->kind; | |
51e29401 RS |
5422 | decl = 0; |
5423 | break; | |
5424 | ||
5425 | default: | |
366de0ce | 5426 | gcc_unreachable (); |
51e29401 RS |
5427 | } |
5428 | if (name == 0) | |
88388a52 JM |
5429 | { |
5430 | gcc_assert (decl_context == PARM | |
5431 | || decl_context == TYPENAME | |
5432 | || (decl_context == FIELD | |
5433 | && declarator->kind == cdk_id)); | |
5434 | gcc_assert (!initialized); | |
5435 | } | |
51e29401 RS |
5436 | } |
5437 | ||
5438 | /* A function definition's declarator must have the form of | |
5439 | a function declarator. */ | |
5440 | ||
f8893e47 | 5441 | if (funcdef_flag && !funcdef_syntax) |
51e29401 RS |
5442 | return 0; |
5443 | ||
51e29401 RS |
5444 | /* If this looks like a function definition, make it one, |
5445 | even if it occurs where parms are expected. | |
5446 | Then store_parm_decls will reject it and not use it as a parm. */ | |
f75fbaf7 | 5447 | if (decl_context == NORMAL && !funcdef_flag && current_scope->parm_flag) |
51e29401 RS |
5448 | decl_context = PARM; |
5449 | ||
deb176fa | 5450 | if (declspecs->deprecated_p && deprecated_state != DEPRECATED_SUPPRESS) |
9b86d6bb | 5451 | warn_deprecated_use (declspecs->type, declspecs->decl_attr); |
51e29401 | 5452 | |
5c076987 JM |
5453 | if ((decl_context == NORMAL || decl_context == FIELD) |
5454 | && current_scope == file_scope | |
5455 | && variably_modified_type_p (type, NULL_TREE)) | |
5456 | { | |
88388a52 | 5457 | if (name) |
c2255bc4 | 5458 | error_at (loc, "variably modified %qE at file scope", name); |
88388a52 | 5459 | else |
c2255bc4 | 5460 | error_at (loc, "variably modified field at file scope"); |
5c076987 JM |
5461 | type = integer_type_node; |
5462 | } | |
5463 | ||
f9551830 | 5464 | size_varies = C_TYPE_VARIABLE_SIZE (type) != 0; |
51e29401 | 5465 | |
98c3a782 | 5466 | /* Diagnose defaulting to "int". */ |
720283f2 | 5467 | |
8400e75e | 5468 | if (declspecs->default_int_p && !in_system_header_at (input_location)) |
51e29401 | 5469 | { |
98c3a782 JM |
5470 | /* Issue a warning if this is an ISO C 99 program or if |
5471 | -Wreturn-type and this is a function, or if -Wimplicit; | |
5472 | prefer the former warning since it is more explicit. */ | |
5473 | if ((warn_implicit_int || warn_return_type || flag_isoc99) | |
5474 | && funcdef_flag) | |
5475 | warn_about_return_type = 1; | |
88388a52 JM |
5476 | else |
5477 | { | |
5478 | if (name) | |
92574c7c | 5479 | warn_defaults_to (loc, OPT_Wimplicit_int, |
35aff4fb MP |
5480 | "type defaults to %<int%> in declaration " |
5481 | "of %qE", name); | |
88388a52 | 5482 | else |
92574c7c | 5483 | warn_defaults_to (loc, OPT_Wimplicit_int, |
35aff4fb | 5484 | "type defaults to %<int%> in type name"); |
88388a52 | 5485 | } |
51e29401 RS |
5486 | } |
5487 | ||
98c3a782 JM |
5488 | /* Adjust the type if a bit-field is being declared, |
5489 | -funsigned-bitfields applied and the type is not explicitly | |
5490 | "signed". */ | |
5491 | if (bitfield && !flag_signed_bitfields && !declspecs->explicit_signed_p | |
5492 | && TREE_CODE (type) == INTEGER_TYPE) | |
726a989a | 5493 | type = unsigned_type_for (type); |
51e29401 | 5494 | |
3932261a MM |
5495 | /* Figure out the type qualifiers for the declaration. There are |
5496 | two ways a declaration can become qualified. One is something | |
5497 | like `const int i' where the `const' is explicit. Another is | |
5498 | something like `typedef const int CI; CI i' where the type of the | |
85b58ca5 JM |
5499 | declaration contains the `const'. A third possibility is that |
5500 | there is a type qualifier on the element type of a typedefed | |
5501 | array type, in which case we should extract that qualifier so | |
5f04ff80 | 5502 | that c_apply_type_quals_to_decl receives the full list of |
85b58ca5 JM |
5503 | qualifiers to work with (C90 is not entirely clear about whether |
5504 | duplicate qualifiers should be diagnosed in this case, but it | |
5505 | seems most appropriate to do so). */ | |
5506 | element_type = strip_array_types (type); | |
3b53cddc JM |
5507 | constp = declspecs->const_p + TYPE_READONLY (element_type); |
5508 | restrictp = declspecs->restrict_p + TYPE_RESTRICT (element_type); | |
5509 | volatilep = declspecs->volatile_p + TYPE_VOLATILE (element_type); | |
267bac10 | 5510 | atomicp = declspecs->atomic_p + TYPE_ATOMIC (element_type); |
36c5e70a BE |
5511 | as1 = declspecs->address_space; |
5512 | as2 = TYPE_ADDR_SPACE (element_type); | |
5513 | address_space = ADDR_SPACE_GENERIC_P (as1)? as2 : as1; | |
5514 | ||
f3bede71 MP |
5515 | if (constp > 1) |
5516 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<const%>"); | |
5517 | if (restrictp > 1) | |
5518 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<restrict%>"); | |
5519 | if (volatilep > 1) | |
5520 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<volatile%>"); | |
5521 | if (atomicp > 1) | |
5522 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<_Atomic%>"); | |
36c5e70a BE |
5523 | |
5524 | if (!ADDR_SPACE_GENERIC_P (as1) && !ADDR_SPACE_GENERIC_P (as2) && as1 != as2) | |
5525 | error_at (loc, "conflicting named address spaces (%s vs %s)", | |
5526 | c_addr_space_name (as1), c_addr_space_name (as2)); | |
5527 | ||
411cdbd8 RG |
5528 | if ((TREE_CODE (type) == ARRAY_TYPE |
5529 | || first_non_attr_kind == cdk_array) | |
5530 | && TYPE_QUALS (element_type)) | |
51e29401 | 5531 | type = TYPE_MAIN_VARIANT (type); |
3932261a MM |
5532 | type_quals = ((constp ? TYPE_QUAL_CONST : 0) |
5533 | | (restrictp ? TYPE_QUAL_RESTRICT : 0) | |
36c5e70a | 5534 | | (volatilep ? TYPE_QUAL_VOLATILE : 0) |
267bac10 | 5535 | | (atomicp ? TYPE_QUAL_ATOMIC : 0) |
36c5e70a | 5536 | | ENCODE_QUAL_ADDR_SPACE (address_space)); |
51e29401 | 5537 | |
267bac10 JM |
5538 | /* Applying the _Atomic qualifier to an array type (through the use |
5539 | of typedefs or typeof) must be detected here. If the qualifier | |
5540 | is introduced later, any appearance of applying it to an array is | |
5541 | actually applying it to an element of that array. */ | |
5542 | if (atomicp && TREE_CODE (type) == ARRAY_TYPE) | |
5543 | error_at (loc, "%<_Atomic%>-qualified array type"); | |
5544 | ||
9a26d6ee JM |
5545 | /* Warn about storage classes that are invalid for certain |
5546 | kinds of declarations (parameters, typenames, etc.). */ | |
5547 | ||
5548 | if (funcdef_flag | |
5549 | && (threadp | |
5550 | || storage_class == csc_auto | |
5551 | || storage_class == csc_register | |
5552 | || storage_class == csc_typedef)) | |
5553 | { | |
fcf73884 | 5554 | if (storage_class == csc_auto) |
b8698a0f | 5555 | pedwarn (loc, |
c1771a20 | 5556 | (current_scope == file_scope) ? 0 : OPT_Wpedantic, |
fcf73884 | 5557 | "function definition declared %<auto%>"); |
9a26d6ee | 5558 | if (storage_class == csc_register) |
c2255bc4 | 5559 | error_at (loc, "function definition declared %<register%>"); |
9a26d6ee | 5560 | if (storage_class == csc_typedef) |
c2255bc4 | 5561 | error_at (loc, "function definition declared %<typedef%>"); |
9a26d6ee | 5562 | if (threadp) |
582d9b50 JM |
5563 | error_at (loc, "function definition declared %qs", |
5564 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
5565 | threadp = false; |
5566 | if (storage_class == csc_auto | |
5567 | || storage_class == csc_register | |
5568 | || storage_class == csc_typedef) | |
5569 | storage_class = csc_none; | |
5570 | } | |
5571 | else if (decl_context != NORMAL && (storage_class != csc_none || threadp)) | |
5572 | { | |
5573 | if (decl_context == PARM && storage_class == csc_register) | |
5574 | ; | |
5575 | else | |
5576 | { | |
5577 | switch (decl_context) | |
5578 | { | |
5579 | case FIELD: | |
88388a52 | 5580 | if (name) |
c2255bc4 AH |
5581 | error_at (loc, "storage class specified for structure " |
5582 | "field %qE", name); | |
88388a52 | 5583 | else |
c2255bc4 | 5584 | error_at (loc, "storage class specified for structure field"); |
9a26d6ee JM |
5585 | break; |
5586 | case PARM: | |
88388a52 | 5587 | if (name) |
c2255bc4 AH |
5588 | error_at (loc, "storage class specified for parameter %qE", |
5589 | name); | |
88388a52 | 5590 | else |
c2255bc4 | 5591 | error_at (loc, "storage class specified for unnamed parameter"); |
9a26d6ee JM |
5592 | break; |
5593 | default: | |
c2255bc4 | 5594 | error_at (loc, "storage class specified for typename"); |
9a26d6ee JM |
5595 | break; |
5596 | } | |
5597 | storage_class = csc_none; | |
5598 | threadp = false; | |
5599 | } | |
5600 | } | |
5601 | else if (storage_class == csc_extern | |
5602 | && initialized | |
5603 | && !funcdef_flag) | |
5604 | { | |
5605 | /* 'extern' with initialization is invalid if not at file scope. */ | |
b8b47f42 GDR |
5606 | if (current_scope == file_scope) |
5607 | { | |
5608 | /* It is fine to have 'extern const' when compiling at C | |
5609 | and C++ intersection. */ | |
5610 | if (!(warn_cxx_compat && constp)) | |
c2255bc4 AH |
5611 | warning_at (loc, 0, "%qE initialized and declared %<extern%>", |
5612 | name); | |
b8b47f42 | 5613 | } |
9a26d6ee | 5614 | else |
c2255bc4 | 5615 | error_at (loc, "%qE has both %<extern%> and initializer", name); |
9a26d6ee JM |
5616 | } |
5617 | else if (current_scope == file_scope) | |
5618 | { | |
5619 | if (storage_class == csc_auto) | |
c2255bc4 AH |
5620 | error_at (loc, "file-scope declaration of %qE specifies %<auto%>", |
5621 | name); | |
9a26d6ee | 5622 | if (pedantic && storage_class == csc_register) |
c1771a20 | 5623 | pedwarn (input_location, OPT_Wpedantic, |
88388a52 | 5624 | "file-scope declaration of %qE specifies %<register%>", name); |
9a26d6ee JM |
5625 | } |
5626 | else | |
5627 | { | |
5628 | if (storage_class == csc_extern && funcdef_flag) | |
c2255bc4 | 5629 | error_at (loc, "nested function %qE declared %<extern%>", name); |
9a26d6ee JM |
5630 | else if (threadp && storage_class == csc_none) |
5631 | { | |
c2255bc4 | 5632 | error_at (loc, "function-scope %qE implicitly auto and declared " |
582d9b50 JM |
5633 | "%qs", name, |
5634 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
5635 | threadp = false; |
5636 | } | |
5637 | } | |
51e29401 RS |
5638 | |
5639 | /* Now figure out the structure of the declarator proper. | |
5640 | Descend through it, creating more complex types, until we reach | |
46df2823 JM |
5641 | the declared identifier (or NULL_TREE, in an absolute declarator). |
5642 | At each stage we maintain an unqualified version of the type | |
5643 | together with any qualifiers that should be applied to it with | |
5644 | c_build_qualified_type; this way, array types including | |
5645 | multidimensional array types are first built up in unqualified | |
5646 | form and then the qualified form is created with | |
5647 | TYPE_MAIN_VARIANT pointing to the unqualified form. */ | |
51e29401 | 5648 | |
f8893e47 | 5649 | while (declarator && declarator->kind != cdk_id) |
51e29401 RS |
5650 | { |
5651 | if (type == error_mark_node) | |
5652 | { | |
f8893e47 | 5653 | declarator = declarator->declarator; |
51e29401 RS |
5654 | continue; |
5655 | } | |
5656 | ||
f8893e47 JM |
5657 | /* Each level of DECLARATOR is either a cdk_array (for ...[..]), |
5658 | a cdk_pointer (for *...), | |
5659 | a cdk_function (for ...(...)), | |
5660 | a cdk_attrs (for nested attributes), | |
5661 | or a cdk_id (for the name being declared | |
5662 | or the place in an absolute declarator | |
51e29401 | 5663 | where the name was omitted). |
f8893e47 | 5664 | For the last case, we have just exited the loop. |
51e29401 RS |
5665 | |
5666 | At this point, TYPE is the type of elements of an array, | |
5667 | or for a function to return, or for a pointer to point to. | |
5668 | After this sequence of ifs, TYPE is the type of the | |
5669 | array or function or pointer, and DECLARATOR has had its | |
5670 | outermost layer removed. */ | |
5671 | ||
3b53cddc JM |
5672 | if (array_ptr_quals != TYPE_UNQUALIFIED |
5673 | || array_ptr_attrs != NULL_TREE | |
5674 | || array_parm_static) | |
0e03329a JM |
5675 | { |
5676 | /* Only the innermost declarator (making a parameter be of | |
5677 | array type which is converted to pointer type) | |
5678 | may have static or type qualifiers. */ | |
c2255bc4 | 5679 | error_at (loc, "static or type qualifiers in non-parameter array declarator"); |
3b53cddc JM |
5680 | array_ptr_quals = TYPE_UNQUALIFIED; |
5681 | array_ptr_attrs = NULL_TREE; | |
0e03329a JM |
5682 | array_parm_static = 0; |
5683 | } | |
5684 | ||
f8893e47 | 5685 | switch (declarator->kind) |
51e29401 | 5686 | { |
f8893e47 | 5687 | case cdk_attrs: |
366de0ce | 5688 | { |
f8893e47 JM |
5689 | /* A declarator with embedded attributes. */ |
5690 | tree attrs = declarator->u.attrs; | |
5691 | const struct c_declarator *inner_decl; | |
366de0ce | 5692 | int attr_flags = 0; |
f8893e47 | 5693 | declarator = declarator->declarator; |
366de0ce | 5694 | inner_decl = declarator; |
f8893e47 JM |
5695 | while (inner_decl->kind == cdk_attrs) |
5696 | inner_decl = inner_decl->declarator; | |
5697 | if (inner_decl->kind == cdk_id) | |
366de0ce | 5698 | attr_flags |= (int) ATTR_FLAG_DECL_NEXT; |
f8893e47 | 5699 | else if (inner_decl->kind == cdk_function) |
366de0ce | 5700 | attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT; |
f8893e47 | 5701 | else if (inner_decl->kind == cdk_array) |
366de0ce NS |
5702 | attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT; |
5703 | returned_attrs = decl_attributes (&type, | |
5704 | chainon (returned_attrs, attrs), | |
5705 | attr_flags); | |
5706 | break; | |
5707 | } | |
f8893e47 | 5708 | case cdk_array: |
366de0ce NS |
5709 | { |
5710 | tree itype = NULL_TREE; | |
f8893e47 | 5711 | tree size = declarator->u.array.dimen; |
366de0ce NS |
5712 | /* The index is a signed object `sizetype' bits wide. */ |
5713 | tree index_type = c_common_signed_type (sizetype); | |
5714 | ||
f8893e47 | 5715 | array_ptr_quals = declarator->u.array.quals; |
3b53cddc | 5716 | array_ptr_attrs = declarator->u.array.attrs; |
f8893e47 | 5717 | array_parm_static = declarator->u.array.static_p; |
52ffd86e MS |
5718 | array_parm_vla_unspec_p = declarator->u.array.vla_unspec_p; |
5719 | ||
f8893e47 | 5720 | declarator = declarator->declarator; |
366de0ce NS |
5721 | |
5722 | /* Check for some types that there cannot be arrays of. */ | |
c22cacf3 | 5723 | |
366de0ce NS |
5724 | if (VOID_TYPE_P (type)) |
5725 | { | |
88388a52 | 5726 | if (name) |
c2255bc4 | 5727 | error_at (loc, "declaration of %qE as array of voids", name); |
88388a52 | 5728 | else |
c2255bc4 | 5729 | error_at (loc, "declaration of type name as array of voids"); |
366de0ce NS |
5730 | type = error_mark_node; |
5731 | } | |
c22cacf3 | 5732 | |
366de0ce NS |
5733 | if (TREE_CODE (type) == FUNCTION_TYPE) |
5734 | { | |
88388a52 | 5735 | if (name) |
c2255bc4 AH |
5736 | error_at (loc, "declaration of %qE as array of functions", |
5737 | name); | |
88388a52 | 5738 | else |
c2255bc4 AH |
5739 | error_at (loc, "declaration of type name as array of " |
5740 | "functions"); | |
366de0ce NS |
5741 | type = error_mark_node; |
5742 | } | |
c22cacf3 | 5743 | |
8400e75e DM |
5744 | if (pedantic && !in_system_header_at (input_location) |
5745 | && flexible_array_type_p (type)) | |
c1771a20 | 5746 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 5747 | "invalid use of structure with flexible array member"); |
c22cacf3 | 5748 | |
366de0ce | 5749 | if (size == error_mark_node) |
51e29401 | 5750 | type = error_mark_node; |
c22cacf3 | 5751 | |
366de0ce NS |
5752 | if (type == error_mark_node) |
5753 | continue; | |
e9a25f70 | 5754 | |
366de0ce NS |
5755 | /* If size was specified, set ITYPE to a range-type for |
5756 | that size. Otherwise, ITYPE remains null. finish_decl | |
5757 | may figure it out from an initial value. */ | |
a25f1211 | 5758 | |
366de0ce NS |
5759 | if (size) |
5760 | { | |
928c19bb JM |
5761 | bool size_maybe_const = true; |
5762 | bool size_int_const = (TREE_CODE (size) == INTEGER_CST | |
5763 | && !TREE_OVERFLOW (size)); | |
5764 | bool this_size_varies = false; | |
5765 | ||
366de0ce NS |
5766 | /* Strip NON_LVALUE_EXPRs since we aren't using as an |
5767 | lvalue. */ | |
5768 | STRIP_TYPE_NOPS (size); | |
c22cacf3 | 5769 | |
3f75a254 | 5770 | if (!INTEGRAL_TYPE_P (TREE_TYPE (size))) |
366de0ce | 5771 | { |
88388a52 | 5772 | if (name) |
c2255bc4 AH |
5773 | error_at (loc, "size of array %qE has non-integer type", |
5774 | name); | |
88388a52 | 5775 | else |
c2255bc4 AH |
5776 | error_at (loc, |
5777 | "size of unnamed array has non-integer type"); | |
366de0ce NS |
5778 | size = integer_one_node; |
5779 | } | |
c22cacf3 | 5780 | |
928c19bb JM |
5781 | size = c_fully_fold (size, false, &size_maybe_const); |
5782 | ||
5783 | if (pedantic && size_maybe_const && integer_zerop (size)) | |
88388a52 JM |
5784 | { |
5785 | if (name) | |
c1771a20 | 5786 | pedwarn (loc, OPT_Wpedantic, |
88388a52 JM |
5787 | "ISO C forbids zero-size array %qE", name); |
5788 | else | |
c1771a20 | 5789 | pedwarn (loc, OPT_Wpedantic, |
88388a52 JM |
5790 | "ISO C forbids zero-size array"); |
5791 | } | |
c22cacf3 | 5792 | |
928c19bb | 5793 | if (TREE_CODE (size) == INTEGER_CST && size_maybe_const) |
366de0ce NS |
5794 | { |
5795 | constant_expression_warning (size); | |
5796 | if (tree_int_cst_sgn (size) < 0) | |
5797 | { | |
88388a52 | 5798 | if (name) |
c2255bc4 | 5799 | error_at (loc, "size of array %qE is negative", name); |
88388a52 | 5800 | else |
c2255bc4 | 5801 | error_at (loc, "size of unnamed array is negative"); |
366de0ce NS |
5802 | size = integer_one_node; |
5803 | } | |
928c19bb JM |
5804 | /* Handle a size folded to an integer constant but |
5805 | not an integer constant expression. */ | |
5806 | if (!size_int_const) | |
5807 | { | |
6ccb2a4a JM |
5808 | /* If this is a file scope declaration of an |
5809 | ordinary identifier, this is invalid code; | |
5810 | diagnosing it here and not subsequently | |
5811 | treating the type as variable-length avoids | |
5812 | more confusing diagnostics later. */ | |
5813 | if ((decl_context == NORMAL || decl_context == FIELD) | |
5814 | && current_scope == file_scope) | |
5815 | pedwarn (input_location, 0, | |
88388a52 JM |
5816 | "variably modified %qE at file scope", |
5817 | name); | |
6ccb2a4a | 5818 | else |
f9551830 | 5819 | this_size_varies = size_varies = true; |
88388a52 | 5820 | warn_variable_length_array (name, size); |
928c19bb | 5821 | } |
366de0ce | 5822 | } |
5c076987 JM |
5823 | else if ((decl_context == NORMAL || decl_context == FIELD) |
5824 | && current_scope == file_scope) | |
5825 | { | |
c2255bc4 | 5826 | error_at (loc, "variably modified %qE at file scope", name); |
5c076987 JM |
5827 | size = integer_one_node; |
5828 | } | |
366de0ce NS |
5829 | else |
5830 | { | |
5831 | /* Make sure the array size remains visibly | |
5832 | nonconstant even if it is (eg) a const variable | |
5833 | with known value. */ | |
f9551830 | 5834 | this_size_varies = size_varies = true; |
88388a52 | 5835 | warn_variable_length_array (name, size); |
b906f4ca | 5836 | if (flag_sanitize & SANITIZE_VLA |
6a7253a4 MP |
5837 | && decl_context == NORMAL |
5838 | && current_function_decl != NULL_TREE | |
5839 | && !lookup_attribute ("no_sanitize_undefined", | |
5840 | DECL_ATTRIBUTES | |
5841 | (current_function_decl))) | |
b906f4ca MP |
5842 | { |
5843 | /* Evaluate the array size only once. */ | |
5844 | size = c_save_expr (size); | |
5845 | size = c_fully_fold (size, false, NULL); | |
5846 | size = fold_build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
5847 | ubsan_instrument_vla (loc, size), | |
5848 | size); | |
5849 | } | |
366de0ce | 5850 | } |
51e29401 | 5851 | |
928c19bb | 5852 | if (integer_zerop (size) && !this_size_varies) |
366de0ce | 5853 | { |
c22cacf3 MS |
5854 | /* A zero-length array cannot be represented with |
5855 | an unsigned index type, which is what we'll | |
5856 | get with build_index_type. Create an | |
5857 | open-ended range instead. */ | |
366de0ce NS |
5858 | itype = build_range_type (sizetype, size, NULL_TREE); |
5859 | } | |
5860 | else | |
5861 | { | |
8b0b9aef RH |
5862 | /* Arrange for the SAVE_EXPR on the inside of the |
5863 | MINUS_EXPR, which allows the -1 to get folded | |
5864 | with the +1 that happens when building TYPE_SIZE. */ | |
5865 | if (size_varies) | |
a04a722b | 5866 | size = save_expr (size); |
928c19bb JM |
5867 | if (this_size_varies && TREE_CODE (size) == INTEGER_CST) |
5868 | size = build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
5869 | integer_zero_node, size); | |
8b0b9aef | 5870 | |
366de0ce NS |
5871 | /* Compute the maximum valid index, that is, size |
5872 | - 1. Do the calculation in index_type, so that | |
5873 | if it is a variable the computations will be | |
5874 | done in the proper mode. */ | |
db3927fb AH |
5875 | itype = fold_build2_loc (loc, MINUS_EXPR, index_type, |
5876 | convert (index_type, size), | |
5877 | convert (index_type, | |
5878 | size_one_node)); | |
366de0ce | 5879 | |
60a45536 RG |
5880 | /* The above overflows when size does not fit |
5881 | in index_type. | |
5882 | ??? While a size of INT_MAX+1 technically shouldn't | |
5883 | cause an overflow (because we subtract 1), handling | |
5884 | this case seems like an unnecessary complication. */ | |
5885 | if (TREE_CODE (size) == INTEGER_CST | |
5886 | && !int_fits_type_p (size, index_type)) | |
366de0ce | 5887 | { |
88388a52 | 5888 | if (name) |
c2255bc4 AH |
5889 | error_at (loc, "size of array %qE is too large", |
5890 | name); | |
88388a52 | 5891 | else |
c2255bc4 | 5892 | error_at (loc, "size of unnamed array is too large"); |
366de0ce NS |
5893 | type = error_mark_node; |
5894 | continue; | |
5895 | } | |
c22cacf3 | 5896 | |
366de0ce NS |
5897 | itype = build_index_type (itype); |
5898 | } | |
928c19bb JM |
5899 | if (this_size_varies) |
5900 | { | |
5901 | if (*expr) | |
5902 | *expr = build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
5903 | *expr, size); | |
5904 | else | |
5905 | *expr = size; | |
5906 | *expr_const_operands &= size_maybe_const; | |
5907 | } | |
366de0ce NS |
5908 | } |
5909 | else if (decl_context == FIELD) | |
5910 | { | |
1de2c900 | 5911 | bool flexible_array_member = false; |
062c4bb3 JM |
5912 | if (array_parm_vla_unspec_p) |
5913 | /* Field names can in fact have function prototype | |
5914 | scope so [*] is disallowed here through making | |
5915 | the field variably modified, not through being | |
5916 | something other than a declaration with function | |
5917 | prototype scope. */ | |
f9551830 | 5918 | size_varies = true; |
1de2c900 JM |
5919 | else |
5920 | { | |
5921 | const struct c_declarator *t = declarator; | |
5922 | while (t->kind == cdk_attrs) | |
5923 | t = t->declarator; | |
5924 | flexible_array_member = (t->kind == cdk_id); | |
5925 | } | |
5926 | if (flexible_array_member | |
8400e75e | 5927 | && !in_system_header_at (input_location)) |
f3bede71 MP |
5928 | pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not " |
5929 | "support flexible array members"); | |
c7b82833 | 5930 | |
366de0ce NS |
5931 | /* ISO C99 Flexible array members are effectively |
5932 | identical to GCC's zero-length array extension. */ | |
1de2c900 JM |
5933 | if (flexible_array_member || array_parm_vla_unspec_p) |
5934 | itype = build_range_type (sizetype, size_zero_node, | |
5935 | NULL_TREE); | |
366de0ce | 5936 | } |
52ffd86e MS |
5937 | else if (decl_context == PARM) |
5938 | { | |
5939 | if (array_parm_vla_unspec_p) | |
5940 | { | |
52ffd86e | 5941 | itype = build_range_type (sizetype, size_zero_node, NULL_TREE); |
f9551830 | 5942 | size_varies = true; |
52ffd86e MS |
5943 | } |
5944 | } | |
8d9f82d5 AO |
5945 | else if (decl_context == TYPENAME) |
5946 | { | |
5947 | if (array_parm_vla_unspec_p) | |
5948 | { | |
062c4bb3 JM |
5949 | /* C99 6.7.5.2p4 */ |
5950 | warning (0, "%<[*]%> not in a declaration"); | |
5951 | /* We use this to avoid messing up with incomplete | |
5952 | array types of the same type, that would | |
5953 | otherwise be modified below. */ | |
8d9f82d5 AO |
5954 | itype = build_range_type (sizetype, size_zero_node, |
5955 | NULL_TREE); | |
f9551830 | 5956 | size_varies = true; |
8d9f82d5 AO |
5957 | } |
5958 | } | |
51e29401 | 5959 | |
636b4106 | 5960 | /* Complain about arrays of incomplete types. */ |
b4519d39 SB |
5961 | if (!COMPLETE_TYPE_P (type)) |
5962 | { | |
c2255bc4 | 5963 | error_at (loc, "array type has incomplete element type"); |
c22cacf3 | 5964 | type = error_mark_node; |
b4519d39 SB |
5965 | } |
5966 | else | |
8d9f82d5 AO |
5967 | /* When itype is NULL, a shared incomplete array type is |
5968 | returned for all array of a given type. Elsewhere we | |
5969 | make sure we don't complete that type before copying | |
5970 | it, but here we want to make sure we don't ever | |
5971 | modify the shared type, so we gcc_assert (itype) | |
5972 | below. */ | |
36c5e70a BE |
5973 | { |
5974 | addr_space_t as = DECODE_QUAL_ADDR_SPACE (type_quals); | |
5975 | if (!ADDR_SPACE_GENERIC_P (as) && as != TYPE_ADDR_SPACE (type)) | |
5976 | type = build_qualified_type (type, | |
5977 | ENCODE_QUAL_ADDR_SPACE (as)); | |
5978 | ||
5979 | type = build_array_type (type, itype); | |
5980 | } | |
51e29401 | 5981 | |
9df594d7 | 5982 | if (type != error_mark_node) |
366de0ce | 5983 | { |
9df594d7 | 5984 | if (size_varies) |
5c076987 | 5985 | { |
8d9f82d5 AO |
5986 | /* It is ok to modify type here even if itype is |
5987 | NULL: if size_varies, we're in a | |
96ff6c8c | 5988 | multi-dimensional array and the inner type has |
8d9f82d5 AO |
5989 | variable size, so the enclosing shared array type |
5990 | must too. */ | |
5c076987 JM |
5991 | if (size && TREE_CODE (size) == INTEGER_CST) |
5992 | type | |
5993 | = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
5994 | C_TYPE_VARIABLE_SIZE (type) = 1; | |
5995 | } | |
9df594d7 RG |
5996 | |
5997 | /* The GCC extension for zero-length arrays differs from | |
5998 | ISO flexible array members in that sizeof yields | |
5999 | zero. */ | |
6000 | if (size && integer_zerop (size)) | |
6001 | { | |
8d9f82d5 | 6002 | gcc_assert (itype); |
8c4353b7 | 6003 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); |
9df594d7 RG |
6004 | TYPE_SIZE (type) = bitsize_zero_node; |
6005 | TYPE_SIZE_UNIT (type) = size_zero_node; | |
e4a95933 | 6006 | SET_TYPE_STRUCTURAL_EQUALITY (type); |
9df594d7 | 6007 | } |
52ffd86e MS |
6008 | if (array_parm_vla_unspec_p) |
6009 | { | |
8d9f82d5 | 6010 | gcc_assert (itype); |
52ffd86e | 6011 | /* The type is complete. C99 6.7.5.2p4 */ |
8c4353b7 | 6012 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); |
52ffd86e MS |
6013 | TYPE_SIZE (type) = bitsize_zero_node; |
6014 | TYPE_SIZE_UNIT (type) = size_zero_node; | |
e4a95933 | 6015 | SET_TYPE_STRUCTURAL_EQUALITY (type); |
52ffd86e | 6016 | } |
366de0ce | 6017 | } |
51e29401 | 6018 | |
366de0ce | 6019 | if (decl_context != PARM |
3b53cddc JM |
6020 | && (array_ptr_quals != TYPE_UNQUALIFIED |
6021 | || array_ptr_attrs != NULL_TREE | |
6022 | || array_parm_static)) | |
366de0ce | 6023 | { |
c2255bc4 | 6024 | error_at (loc, "static or type qualifiers in non-parameter array declarator"); |
3b53cddc JM |
6025 | array_ptr_quals = TYPE_UNQUALIFIED; |
6026 | array_ptr_attrs = NULL_TREE; | |
366de0ce NS |
6027 | array_parm_static = 0; |
6028 | } | |
6029 | break; | |
6030 | } | |
f8893e47 | 6031 | case cdk_function: |
366de0ce NS |
6032 | { |
6033 | /* Say it's a definition only for the declarator closest | |
6034 | to the identifier, apart possibly from some | |
6035 | attributes. */ | |
6036 | bool really_funcdef = false; | |
6037 | tree arg_types; | |
6038 | if (funcdef_flag) | |
6039 | { | |
f8893e47 JM |
6040 | const struct c_declarator *t = declarator->declarator; |
6041 | while (t->kind == cdk_attrs) | |
6042 | t = t->declarator; | |
6043 | really_funcdef = (t->kind == cdk_id); | |
366de0ce | 6044 | } |
51e29401 | 6045 | |
366de0ce NS |
6046 | /* Declaring a function type. Make sure we have a valid |
6047 | type for the function to return. */ | |
6048 | if (type == error_mark_node) | |
6049 | continue; | |
c22cacf3 | 6050 | |
f9551830 | 6051 | size_varies = false; |
51e29401 | 6052 | |
366de0ce NS |
6053 | /* Warn about some types functions can't return. */ |
6054 | if (TREE_CODE (type) == FUNCTION_TYPE) | |
6055 | { | |
88388a52 | 6056 | if (name) |
c2255bc4 AH |
6057 | error_at (loc, "%qE declared as function returning a " |
6058 | "function", name); | |
88388a52 | 6059 | else |
c2255bc4 AH |
6060 | error_at (loc, "type name declared as function " |
6061 | "returning a function"); | |
366de0ce NS |
6062 | type = integer_type_node; |
6063 | } | |
6064 | if (TREE_CODE (type) == ARRAY_TYPE) | |
6065 | { | |
88388a52 | 6066 | if (name) |
c2255bc4 AH |
6067 | error_at (loc, "%qE declared as function returning an array", |
6068 | name); | |
88388a52 | 6069 | else |
c2255bc4 AH |
6070 | error_at (loc, "type name declared as function returning " |
6071 | "an array"); | |
366de0ce NS |
6072 | type = integer_type_node; |
6073 | } | |
40449a90 SL |
6074 | errmsg = targetm.invalid_return_type (type); |
6075 | if (errmsg) | |
6076 | { | |
6077 | error (errmsg); | |
6078 | type = integer_type_node; | |
6079 | } | |
51e29401 | 6080 | |
366de0ce NS |
6081 | /* Construct the function type and go to the next |
6082 | inner layer of declarator. */ | |
f8893e47 | 6083 | arg_info = declarator->u.arg_info; |
366de0ce | 6084 | arg_types = grokparms (arg_info, really_funcdef); |
51e29401 | 6085 | |
366de0ce NS |
6086 | /* Type qualifiers before the return type of the function |
6087 | qualify the return type, not the function type. */ | |
6088 | if (type_quals) | |
6089 | { | |
c22cacf3 | 6090 | /* Type qualifiers on a function return type are |
366de0ce NS |
6091 | normally permitted by the standard but have no |
6092 | effect, so give a warning at -Wreturn-type. | |
6093 | Qualifiers on a void return type are banned on | |
6094 | function definitions in ISO C; GCC used to used | |
6095 | them for noreturn functions. */ | |
6096 | if (VOID_TYPE_P (type) && really_funcdef) | |
c2255bc4 | 6097 | pedwarn (loc, 0, |
509c9d60 | 6098 | "function definition has qualified void return type"); |
44c21c7f | 6099 | else |
c2255bc4 | 6100 | warning_at (loc, OPT_Wignored_qualifiers, |
44c21c7f | 6101 | "type qualifiers ignored on function return type"); |
c22cacf3 | 6102 | |
366de0ce NS |
6103 | type = c_build_qualified_type (type, type_quals); |
6104 | } | |
6105 | type_quals = TYPE_UNQUALIFIED; | |
c22cacf3 | 6106 | |
366de0ce | 6107 | type = build_function_type (type, arg_types); |
f8893e47 | 6108 | declarator = declarator->declarator; |
c22cacf3 | 6109 | |
366de0ce NS |
6110 | /* Set the TYPE_CONTEXTs for each tagged type which is local to |
6111 | the formal parameter list of this FUNCTION_TYPE to point to | |
6112 | the FUNCTION_TYPE node itself. */ | |
e0c9fbb7 | 6113 | { |
e60bf9d4 NF |
6114 | c_arg_tag *tag; |
6115 | unsigned ix; | |
c22cacf3 | 6116 | |
9771b263 | 6117 | FOR_EACH_VEC_SAFE_ELT_REVERSE (arg_info->tags, ix, tag) |
e60bf9d4 | 6118 | TYPE_CONTEXT (tag->type) = type; |
e0c9fbb7 | 6119 | } |
366de0ce NS |
6120 | break; |
6121 | } | |
f8893e47 | 6122 | case cdk_pointer: |
51e29401 | 6123 | { |
366de0ce NS |
6124 | /* Merge any constancy or volatility into the target type |
6125 | for the pointer. */ | |
267bac10 JM |
6126 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6127 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6128 | { | |
6129 | error_at (loc, | |
6130 | "%<_Atomic%>-qualified function type"); | |
6131 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6132 | } | |
6133 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6134 | && type_quals) | |
c1771a20 | 6135 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6136 | "ISO C forbids qualified function types"); |
366de0ce NS |
6137 | if (type_quals) |
6138 | type = c_build_qualified_type (type, type_quals); | |
f9551830 | 6139 | size_varies = false; |
3b53cddc | 6140 | |
706c4bb7 OH |
6141 | /* When the pointed-to type involves components of variable size, |
6142 | care must be taken to ensure that the size evaluation code is | |
6143 | emitted early enough to dominate all the possible later uses | |
6144 | and late enough for the variables on which it depends to have | |
6145 | been assigned. | |
6146 | ||
6147 | This is expected to happen automatically when the pointed-to | |
6148 | type has a name/declaration of it's own, but special attention | |
6149 | is required if the type is anonymous. | |
6150 | ||
6151 | We handle the NORMAL and FIELD contexts here by attaching an | |
6152 | artificial TYPE_DECL to such pointed-to type. This forces the | |
6153 | sizes evaluation at a safe point and ensures it is not deferred | |
6154 | until e.g. within a deeper conditional context. | |
6155 | ||
6156 | We expect nothing to be needed here for PARM or TYPENAME. | |
6157 | Pushing a TYPE_DECL at this point for TYPENAME would actually | |
6158 | be incorrect, as we might be in the middle of an expression | |
6159 | with side effects on the pointed-to type size "arguments" prior | |
6160 | to the pointer declaration point and the fake TYPE_DECL in the | |
6161 | enclosing context would force the size evaluation prior to the | |
6162 | side effects. */ | |
6163 | ||
6164 | if (!TYPE_NAME (type) | |
6165 | && (decl_context == NORMAL || decl_context == FIELD) | |
6166 | && variably_modified_type_p (type, NULL_TREE)) | |
6167 | { | |
c2255bc4 | 6168 | tree decl = build_decl (loc, TYPE_DECL, NULL_TREE, type); |
706c4bb7 OH |
6169 | DECL_ARTIFICIAL (decl) = 1; |
6170 | pushdecl (decl); | |
c2255bc4 | 6171 | finish_decl (decl, loc, NULL_TREE, NULL_TREE, NULL_TREE); |
706c4bb7 OH |
6172 | TYPE_NAME (type) = decl; |
6173 | } | |
6174 | ||
412cd719 | 6175 | type = c_build_pointer_type (type); |
c22cacf3 | 6176 | |
deb176fa JM |
6177 | /* Process type qualifiers (such as const or volatile) |
6178 | that were given inside the `*'. */ | |
3b53cddc | 6179 | type_quals = declarator->u.pointer_quals; |
deb176fa | 6180 | |
f8893e47 | 6181 | declarator = declarator->declarator; |
366de0ce | 6182 | break; |
51e29401 | 6183 | } |
366de0ce NS |
6184 | default: |
6185 | gcc_unreachable (); | |
51e29401 | 6186 | } |
51e29401 | 6187 | } |
b9baeecd | 6188 | *decl_attrs = chainon (returned_attrs, *decl_attrs); |
51e29401 | 6189 | |
46df2823 JM |
6190 | /* Now TYPE has the actual type, apart from any qualifiers in |
6191 | TYPE_QUALS. */ | |
51e29401 | 6192 | |
36c5e70a BE |
6193 | /* Warn about address space used for things other than static memory or |
6194 | pointers. */ | |
6195 | address_space = DECODE_QUAL_ADDR_SPACE (type_quals); | |
6196 | if (!ADDR_SPACE_GENERIC_P (address_space)) | |
6197 | { | |
6198 | if (decl_context == NORMAL) | |
6199 | { | |
6200 | switch (storage_class) | |
6201 | { | |
6202 | case csc_auto: | |
6203 | error ("%qs combined with %<auto%> qualifier for %qE", | |
6204 | c_addr_space_name (address_space), name); | |
6205 | break; | |
6206 | case csc_register: | |
6207 | error ("%qs combined with %<register%> qualifier for %qE", | |
6208 | c_addr_space_name (address_space), name); | |
6209 | break; | |
6210 | case csc_none: | |
6211 | if (current_function_scope) | |
6212 | { | |
6213 | error ("%qs specified for auto variable %qE", | |
6214 | c_addr_space_name (address_space), name); | |
6215 | break; | |
6216 | } | |
6217 | break; | |
6218 | case csc_static: | |
6219 | case csc_extern: | |
6220 | case csc_typedef: | |
6221 | break; | |
6222 | default: | |
6223 | gcc_unreachable (); | |
6224 | } | |
6225 | } | |
6226 | else if (decl_context == PARM && TREE_CODE (type) != ARRAY_TYPE) | |
6227 | { | |
6228 | if (name) | |
6229 | error ("%qs specified for parameter %qE", | |
6230 | c_addr_space_name (address_space), name); | |
6231 | else | |
6232 | error ("%qs specified for unnamed parameter", | |
6233 | c_addr_space_name (address_space)); | |
6234 | } | |
6235 | else if (decl_context == FIELD) | |
6236 | { | |
6237 | if (name) | |
6238 | error ("%qs specified for structure field %qE", | |
6239 | c_addr_space_name (address_space), name); | |
6240 | else | |
6241 | error ("%qs specified for structure field", | |
6242 | c_addr_space_name (address_space)); | |
6243 | } | |
6244 | } | |
6245 | ||
d134f39e JM |
6246 | /* Check the type and width of a bit-field. */ |
6247 | if (bitfield) | |
267bac10 JM |
6248 | { |
6249 | check_bitfield_type_and_width (&type, width, name); | |
6250 | /* C11 makes it implementation-defined (6.7.2.1#5) whether | |
6251 | atomic types are permitted for bit-fields; we have no code to | |
6252 | make bit-field accesses atomic, so disallow them. */ | |
6253 | if (type_quals & TYPE_QUAL_ATOMIC) | |
6254 | { | |
6255 | if (name) | |
6256 | error ("bit-field %qE has atomic type", name); | |
6257 | else | |
6258 | error ("bit-field has atomic type"); | |
6259 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6260 | } | |
6261 | } | |
d134f39e | 6262 | |
d19fa6b5 JM |
6263 | /* Reject invalid uses of _Alignas. */ |
6264 | if (declspecs->alignas_p) | |
6265 | { | |
6266 | if (storage_class == csc_typedef) | |
6267 | error_at (loc, "alignment specified for typedef %qE", name); | |
6268 | else if (storage_class == csc_register) | |
6269 | error_at (loc, "alignment specified for %<register%> object %qE", | |
6270 | name); | |
6271 | else if (decl_context == PARM) | |
6272 | { | |
6273 | if (name) | |
6274 | error_at (loc, "alignment specified for parameter %qE", name); | |
6275 | else | |
6276 | error_at (loc, "alignment specified for unnamed parameter"); | |
6277 | } | |
6278 | else if (bitfield) | |
6279 | { | |
6280 | if (name) | |
6281 | error_at (loc, "alignment specified for bit-field %qE", name); | |
6282 | else | |
6283 | error_at (loc, "alignment specified for unnamed bit-field"); | |
6284 | } | |
6285 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6286 | error_at (loc, "alignment specified for function %qE", name); | |
6287 | else if (declspecs->align_log != -1) | |
6288 | { | |
6289 | alignas_align = 1U << declspecs->align_log; | |
2793eeab | 6290 | if (alignas_align < min_align_of_type (type)) |
d19fa6b5 JM |
6291 | { |
6292 | if (name) | |
6293 | error_at (loc, "%<_Alignas%> specifiers cannot reduce " | |
6294 | "alignment of %qE", name); | |
6295 | else | |
6296 | error_at (loc, "%<_Alignas%> specifiers cannot reduce " | |
6297 | "alignment of unnamed field"); | |
6298 | alignas_align = 0; | |
6299 | } | |
6300 | } | |
6301 | } | |
6302 | ||
56099f00 RG |
6303 | /* Did array size calculations overflow or does the array cover more |
6304 | than half of the address-space? */ | |
e9a25f70 | 6305 | if (TREE_CODE (type) == ARRAY_TYPE |
d0f062fb | 6306 | && COMPLETE_TYPE_P (type) |
9bc2a5cb | 6307 | && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST |
56099f00 | 6308 | && ! valid_constant_size_p (TYPE_SIZE_UNIT (type))) |
68940175 | 6309 | { |
88388a52 | 6310 | if (name) |
c2255bc4 | 6311 | error_at (loc, "size of array %qE is too large", name); |
88388a52 | 6312 | else |
c2255bc4 | 6313 | error_at (loc, "size of unnamed array is too large"); |
684d9f3b | 6314 | /* If we proceed with the array type as it is, we'll eventually |
386b1f1f | 6315 | crash in tree_to_[su]hwi(). */ |
68940175 AO |
6316 | type = error_mark_node; |
6317 | } | |
e9a25f70 | 6318 | |
51e29401 RS |
6319 | /* If this is declaring a typedef name, return a TYPE_DECL. */ |
6320 | ||
9a26d6ee | 6321 | if (storage_class == csc_typedef) |
51e29401 RS |
6322 | { |
6323 | tree decl; | |
267bac10 JM |
6324 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6325 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6326 | { | |
6327 | error_at (loc, | |
6328 | "%<_Atomic%>-qualified function type"); | |
6329 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6330 | } | |
6331 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6332 | && type_quals) | |
c1771a20 | 6333 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6334 | "ISO C forbids qualified function types"); |
3932261a MM |
6335 | if (type_quals) |
6336 | type = c_build_qualified_type (type, type_quals); | |
c2255bc4 AH |
6337 | decl = build_decl (declarator->id_loc, |
6338 | TYPE_DECL, declarator->u.id, type); | |
98c3a782 | 6339 | if (declspecs->explicit_signed_p) |
51e29401 | 6340 | C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1; |
61f4f1cc | 6341 | if (declspecs->inline_p) |
c2255bc4 | 6342 | pedwarn (loc, 0,"typedef %q+D declared %<inline%>", decl); |
bbceee64 JM |
6343 | if (declspecs->noreturn_p) |
6344 | pedwarn (loc, 0,"typedef %q+D declared %<_Noreturn%>", decl); | |
7e5487a2 ILT |
6345 | |
6346 | if (warn_cxx_compat && declarator->u.id != NULL_TREE) | |
6347 | { | |
6348 | struct c_binding *b = I_TAG_BINDING (declarator->u.id); | |
6349 | ||
6350 | if (b != NULL | |
6351 | && b->decl != NULL_TREE | |
6352 | && (B_IN_CURRENT_SCOPE (b) | |
6353 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
6354 | && TYPE_MAIN_VARIANT (b->decl) != TYPE_MAIN_VARIANT (type)) | |
6355 | { | |
6356 | warning_at (declarator->id_loc, OPT_Wc___compat, | |
6357 | ("using %qD as both a typedef and a tag is " | |
6358 | "invalid in C++"), | |
6359 | decl); | |
6360 | if (b->locus != UNKNOWN_LOCATION) | |
6361 | inform (b->locus, "originally defined here"); | |
6362 | } | |
6363 | } | |
6364 | ||
51e29401 RS |
6365 | return decl; |
6366 | } | |
6367 | ||
51e29401 RS |
6368 | /* If this is a type name (such as, in a cast or sizeof), |
6369 | compute the type and return it now. */ | |
6370 | ||
6371 | if (decl_context == TYPENAME) | |
6372 | { | |
61f4f1cc JM |
6373 | /* Note that the grammar rejects storage classes in typenames |
6374 | and fields. */ | |
6375 | gcc_assert (storage_class == csc_none && !threadp | |
bbceee64 | 6376 | && !declspecs->inline_p && !declspecs->noreturn_p); |
267bac10 JM |
6377 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6378 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6379 | { | |
6380 | error_at (loc, | |
6381 | "%<_Atomic%>-qualified function type"); | |
6382 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6383 | } | |
6384 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6385 | && type_quals) | |
c1771a20 | 6386 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6387 | "ISO C forbids const or volatile function types"); |
3932261a MM |
6388 | if (type_quals) |
6389 | type = c_build_qualified_type (type, type_quals); | |
51e29401 RS |
6390 | return type; |
6391 | } | |
6392 | ||
52ffd86e MS |
6393 | if (pedantic && decl_context == FIELD |
6394 | && variably_modified_type_p (type, NULL_TREE)) | |
6395 | { | |
6396 | /* C99 6.7.2.1p8 */ | |
c1771a20 | 6397 | pedwarn (loc, OPT_Wpedantic, "a member of a structure or union cannot " |
c2255bc4 | 6398 | "have a variably modified type"); |
52ffd86e MS |
6399 | } |
6400 | ||
61df2ee2 RS |
6401 | /* Aside from typedefs and type names (handle above), |
6402 | `void' at top level (not within pointer) | |
6403 | is allowed only in public variables. | |
51e29401 RS |
6404 | We don't complain about parms either, but that is because |
6405 | a better error message can be made later. */ | |
6406 | ||
71653180 | 6407 | if (VOID_TYPE_P (type) && decl_context != PARM |
3f75a254 | 6408 | && !((decl_context != FIELD && TREE_CODE (type) != FUNCTION_TYPE) |
9a26d6ee | 6409 | && (storage_class == csc_extern |
f75fbaf7 | 6410 | || (current_scope == file_scope |
9a26d6ee JM |
6411 | && !(storage_class == csc_static |
6412 | || storage_class == csc_register))))) | |
51e29401 | 6413 | { |
c2255bc4 | 6414 | error_at (loc, "variable or field %qE declared void", name); |
51e29401 RS |
6415 | type = integer_type_node; |
6416 | } | |
6417 | ||
6418 | /* Now create the decl, which may be a VAR_DECL, a PARM_DECL | |
6419 | or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */ | |
6420 | ||
6421 | { | |
91d231cb | 6422 | tree decl; |
51e29401 RS |
6423 | |
6424 | if (decl_context == PARM) | |
6425 | { | |
c530479e | 6426 | tree promoted_type; |
773ec47f | 6427 | bool array_parameter_p = false; |
51e29401 RS |
6428 | |
6429 | /* A parameter declared as an array of T is really a pointer to T. | |
6430 | One declared as a function is really a pointer to a function. */ | |
6431 | ||
6432 | if (TREE_CODE (type) == ARRAY_TYPE) | |
6433 | { | |
6434 | /* Transfer const-ness of array into that of type pointed to. */ | |
eaf2e788 | 6435 | type = TREE_TYPE (type); |
3932261a MM |
6436 | if (type_quals) |
6437 | type = c_build_qualified_type (type, type_quals); | |
412cd719 | 6438 | type = c_build_pointer_type (type); |
3b53cddc | 6439 | type_quals = array_ptr_quals; |
b09869ff JM |
6440 | if (type_quals) |
6441 | type = c_build_qualified_type (type, type_quals); | |
0e03329a | 6442 | |
3b53cddc JM |
6443 | /* We don't yet implement attributes in this context. */ |
6444 | if (array_ptr_attrs != NULL_TREE) | |
c2255bc4 AH |
6445 | warning_at (loc, OPT_Wattributes, |
6446 | "attributes in parameter array declarator ignored"); | |
0e03329a | 6447 | |
f9551830 | 6448 | size_varies = false; |
773ec47f | 6449 | array_parameter_p = true; |
51e29401 RS |
6450 | } |
6451 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6452 | { | |
267bac10 JM |
6453 | if (type_quals & TYPE_QUAL_ATOMIC) |
6454 | { | |
6455 | error_at (loc, | |
6456 | "%<_Atomic%>-qualified function type"); | |
6457 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6458 | } | |
6459 | else if (type_quals) | |
c1771a20 | 6460 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6461 | "ISO C forbids qualified function types"); |
3932261a MM |
6462 | if (type_quals) |
6463 | type = c_build_qualified_type (type, type_quals); | |
412cd719 | 6464 | type = c_build_pointer_type (type); |
3932261a | 6465 | type_quals = TYPE_UNQUALIFIED; |
51e29401 | 6466 | } |
0f38b811 MM |
6467 | else if (type_quals) |
6468 | type = c_build_qualified_type (type, type_quals); | |
35b1a6fa | 6469 | |
c2255bc4 AH |
6470 | decl = build_decl (declarator->id_loc, |
6471 | PARM_DECL, declarator->u.id, type); | |
929f3671 | 6472 | if (size_varies) |
51e29401 | 6473 | C_DECL_VARIABLE_SIZE (decl) = 1; |
773ec47f | 6474 | C_ARRAY_PARAMETER (decl) = array_parameter_p; |
51e29401 RS |
6475 | |
6476 | /* Compute the type actually passed in the parmlist, | |
6477 | for the case where there is no prototype. | |
6478 | (For example, shorts and chars are passed as ints.) | |
6479 | When there is a prototype, this is overridden later. */ | |
6480 | ||
c530479e RH |
6481 | if (type == error_mark_node) |
6482 | promoted_type = type; | |
6483 | else | |
ab393bf1 | 6484 | promoted_type = c_type_promotes_to (type); |
51e29401 | 6485 | |
c530479e | 6486 | DECL_ARG_TYPE (decl) = promoted_type; |
61f4f1cc | 6487 | if (declspecs->inline_p) |
c2255bc4 | 6488 | pedwarn (loc, 0, "parameter %q+D declared %<inline%>", decl); |
bbceee64 JM |
6489 | if (declspecs->noreturn_p) |
6490 | pedwarn (loc, 0, "parameter %q+D declared %<_Noreturn%>", decl); | |
51e29401 RS |
6491 | } |
6492 | else if (decl_context == FIELD) | |
6493 | { | |
61f4f1cc JM |
6494 | /* Note that the grammar rejects storage classes in typenames |
6495 | and fields. */ | |
6496 | gcc_assert (storage_class == csc_none && !threadp | |
bbceee64 | 6497 | && !declspecs->inline_p && !declspecs->noreturn_p); |
61f4f1cc | 6498 | |
51e29401 | 6499 | /* Structure field. It may not be a function. */ |
dfd48d76 | 6500 | |
51e29401 RS |
6501 | if (TREE_CODE (type) == FUNCTION_TYPE) |
6502 | { | |
c2255bc4 | 6503 | error_at (loc, "field %qE declared as a function", name); |
51e29401 RS |
6504 | type = build_pointer_type (type); |
6505 | } | |
d0f062fb | 6506 | else if (TREE_CODE (type) != ERROR_MARK |
c22cacf3 | 6507 | && !COMPLETE_OR_UNBOUND_ARRAY_TYPE_P (type)) |
51e29401 | 6508 | { |
1202aec1 | 6509 | if (name) |
c2255bc4 | 6510 | error_at (loc, "field %qE has incomplete type", name); |
1202aec1 | 6511 | else |
c2255bc4 | 6512 | error_at (loc, "unnamed field has incomplete type"); |
51e29401 RS |
6513 | type = error_mark_node; |
6514 | } | |
46df2823 | 6515 | type = c_build_qualified_type (type, type_quals); |
c2255bc4 AH |
6516 | decl = build_decl (declarator->id_loc, |
6517 | FIELD_DECL, declarator->u.id, type); | |
2bf105ab | 6518 | DECL_NONADDRESSABLE_P (decl) = bitfield; |
ab53bae2 AO |
6519 | if (bitfield && !declarator->u.id) |
6520 | TREE_NO_WARNING (decl) = 1; | |
2bf105ab | 6521 | |
929f3671 | 6522 | if (size_varies) |
51e29401 RS |
6523 | C_DECL_VARIABLE_SIZE (decl) = 1; |
6524 | } | |
6525 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6526 | { | |
9a26d6ee | 6527 | if (storage_class == csc_register || threadp) |
1ac0ac8b | 6528 | { |
c2255bc4 | 6529 | error_at (loc, "invalid storage class for function %qE", name); |
636b4106 | 6530 | } |
ff164b22 GK |
6531 | else if (current_scope != file_scope) |
6532 | { | |
6533 | /* Function declaration not at file scope. Storage | |
6534 | classes other than `extern' are not allowed, C99 | |
6535 | 6.7.1p5, and `extern' makes no difference. However, | |
6536 | GCC allows 'auto', perhaps with 'inline', to support | |
6537 | nested functions. */ | |
9a26d6ee | 6538 | if (storage_class == csc_auto) |
c1771a20 | 6539 | pedwarn (loc, OPT_Wpedantic, |
88388a52 | 6540 | "invalid storage class for function %qE", name); |
6f17bbcf | 6541 | else if (storage_class == csc_static) |
1ac0ac8b | 6542 | { |
c2255bc4 | 6543 | error_at (loc, "invalid storage class for function %qE", name); |
c22cacf3 | 6544 | if (funcdef_flag) |
6f17bbcf JM |
6545 | storage_class = declspecs->storage_class = csc_none; |
6546 | else | |
6547 | return 0; | |
1ac0ac8b | 6548 | } |
ff164b22 | 6549 | } |
fd0b8fce | 6550 | |
c2255bc4 AH |
6551 | decl = build_decl (declarator->id_loc, |
6552 | FUNCTION_DECL, declarator->u.id, type); | |
6f17bbcf JM |
6553 | decl = build_decl_attribute_variant (decl, decl_attr); |
6554 | ||
267bac10 JM |
6555 | if (type_quals & TYPE_QUAL_ATOMIC) |
6556 | { | |
6557 | error_at (loc, | |
6558 | "%<_Atomic%>-qualified function type"); | |
6559 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6560 | } | |
6561 | else if (pedantic && type_quals && !DECL_IN_SYSTEM_HEADER (decl)) | |
c1771a20 | 6562 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 6563 | "ISO C forbids qualified function types"); |
51e29401 | 6564 | |
9affb2c7 ZW |
6565 | /* Every function declaration is an external reference |
6566 | (DECL_EXTERNAL) except for those which are not at file | |
6567 | scope and are explicitly declared "auto". This is | |
6568 | forbidden by standard C (C99 6.7.1p5) and is interpreted by | |
6569 | GCC to signify a forward declaration of a nested function. */ | |
9a26d6ee | 6570 | if (storage_class == csc_auto && current_scope != file_scope) |
9affb2c7 | 6571 | DECL_EXTERNAL (decl) = 0; |
71113fcd GK |
6572 | /* In C99, a function which is declared 'inline' with 'extern' |
6573 | is not an external reference (which is confusing). It | |
6574 | means that the later definition of the function must be output | |
6575 | in this file, C99 6.7.4p6. In GNU C89, a function declared | |
6576 | 'extern inline' is an external reference. */ | |
6577 | else if (declspecs->inline_p && storage_class != csc_static) | |
da1c7394 ILT |
6578 | DECL_EXTERNAL (decl) = ((storage_class == csc_extern) |
6579 | == flag_gnu89_inline); | |
9affb2c7 | 6580 | else |
71113fcd | 6581 | DECL_EXTERNAL (decl) = !initialized; |
caf93cb0 | 6582 | |
51e29401 RS |
6583 | /* Record absence of global scope for `static' or `auto'. */ |
6584 | TREE_PUBLIC (decl) | |
9a26d6ee | 6585 | = !(storage_class == csc_static || storage_class == csc_auto); |
c40f7b33 | 6586 | |
77dbdb57 | 6587 | /* For a function definition, record the argument information |
7b112487 | 6588 | block where store_parm_decls will look for it. */ |
77dbdb57 | 6589 | if (funcdef_flag) |
7b112487 | 6590 | current_function_arg_info = arg_info; |
77dbdb57 | 6591 | |
98c3a782 | 6592 | if (declspecs->default_int_p) |
5ce89b2e JM |
6593 | C_FUNCTION_IMPLICIT_INT (decl) = 1; |
6594 | ||
bbceee64 JM |
6595 | /* Record presence of `inline' and `_Noreturn', if it is |
6596 | reasonable. */ | |
61f4f1cc | 6597 | if (flag_hosted && MAIN_NAME_P (declarator->u.id)) |
51e29401 | 6598 | { |
9a26d6ee | 6599 | if (declspecs->inline_p) |
c2255bc4 | 6600 | pedwarn (loc, 0, "cannot inline function %<main%>"); |
bbceee64 JM |
6601 | if (declspecs->noreturn_p) |
6602 | pedwarn (loc, 0, "%<main%> declared %<_Noreturn%>"); | |
6603 | } | |
6604 | else | |
6605 | { | |
6606 | if (declspecs->inline_p) | |
6607 | /* Record that the function is declared `inline'. */ | |
6608 | DECL_DECLARED_INLINE_P (decl) = 1; | |
6609 | if (declspecs->noreturn_p) | |
c4b3a0a0 | 6610 | { |
35aff4fb MP |
6611 | if (flag_isoc99) |
6612 | pedwarn_c99 (loc, OPT_Wpedantic, | |
c4b3a0a0 | 6613 | "ISO C99 does not support %<_Noreturn%>"); |
35aff4fb MP |
6614 | else |
6615 | pedwarn_c99 (loc, OPT_Wpedantic, | |
c4b3a0a0 | 6616 | "ISO C90 does not support %<_Noreturn%>"); |
c4b3a0a0 JM |
6617 | TREE_THIS_VOLATILE (decl) = 1; |
6618 | } | |
31ed8fea | 6619 | } |
51e29401 RS |
6620 | } |
6621 | else | |
6622 | { | |
6623 | /* It's a variable. */ | |
fd0b8fce | 6624 | /* An uninitialized decl with `extern' is a reference. */ |
9a26d6ee | 6625 | int extern_ref = !initialized && storage_class == csc_extern; |
51e29401 | 6626 | |
46df2823 | 6627 | type = c_build_qualified_type (type, type_quals); |
f4e92987 | 6628 | |
f75fbaf7 ZW |
6629 | /* C99 6.2.2p7: It is invalid (compile-time undefined |
6630 | behavior) to create an 'extern' declaration for a | |
f4e92987 | 6631 | variable if there is a global declaration that is |
f75fbaf7 ZW |
6632 | 'static' and the global declaration is not visible. |
6633 | (If the static declaration _is_ currently visible, | |
6634 | the 'extern' declaration is taken to refer to that decl.) */ | |
6635 | if (extern_ref && current_scope != file_scope) | |
f4e92987 | 6636 | { |
f8893e47 JM |
6637 | tree global_decl = identifier_global_value (declarator->u.id); |
6638 | tree visible_decl = lookup_name (declarator->u.id); | |
f4e92987 | 6639 | |
35b1a6fa | 6640 | if (global_decl |
f75fbaf7 | 6641 | && global_decl != visible_decl |
f4e92987 MM |
6642 | && TREE_CODE (global_decl) == VAR_DECL |
6643 | && !TREE_PUBLIC (global_decl)) | |
c2255bc4 AH |
6644 | error_at (loc, "variable previously declared %<static%> " |
6645 | "redeclared %<extern%>"); | |
f4e92987 MM |
6646 | } |
6647 | ||
c2255bc4 AH |
6648 | decl = build_decl (declarator->id_loc, |
6649 | VAR_DECL, declarator->u.id, type); | |
929f3671 | 6650 | if (size_varies) |
51e29401 RS |
6651 | C_DECL_VARIABLE_SIZE (decl) = 1; |
6652 | ||
9a26d6ee | 6653 | if (declspecs->inline_p) |
c2255bc4 | 6654 | pedwarn (loc, 0, "variable %q+D declared %<inline%>", decl); |
bbceee64 JM |
6655 | if (declspecs->noreturn_p) |
6656 | pedwarn (loc, 0, "variable %q+D declared %<_Noreturn%>", decl); | |
51e29401 | 6657 | |
bbbcb2e1 JM |
6658 | /* At file scope, an initialized extern declaration may follow |
6659 | a static declaration. In that case, DECL_EXTERNAL will be | |
6660 | reset later in start_decl. */ | |
9a26d6ee | 6661 | DECL_EXTERNAL (decl) = (storage_class == csc_extern); |
3d78f2e9 | 6662 | |
f8521984 | 6663 | /* At file scope, the presence of a `static' or `register' storage |
ee534ebf RS |
6664 | class specifier, or the absence of all storage class specifiers |
6665 | makes this declaration a definition (perhaps tentative). Also, | |
fcc207bf | 6666 | the absence of `static' makes it public. */ |
f75fbaf7 | 6667 | if (current_scope == file_scope) |
51e29401 | 6668 | { |
fcc207bf | 6669 | TREE_PUBLIC (decl) = storage_class != csc_static; |
3d78f2e9 | 6670 | TREE_STATIC (decl) = !extern_ref; |
51e29401 | 6671 | } |
f8521984 | 6672 | /* Not at file scope, only `static' makes a static definition. */ |
51e29401 RS |
6673 | else |
6674 | { | |
9a26d6ee | 6675 | TREE_STATIC (decl) = (storage_class == csc_static); |
3d78f2e9 RH |
6676 | TREE_PUBLIC (decl) = extern_ref; |
6677 | } | |
6678 | ||
9a26d6ee | 6679 | if (threadp) |
56363ffd | 6680 | set_decl_tls_model (decl, decl_default_tls_model (decl)); |
51e29401 RS |
6681 | } |
6682 | ||
92f6fd0b JM |
6683 | if ((storage_class == csc_extern |
6684 | || (storage_class == csc_none | |
6685 | && TREE_CODE (type) == FUNCTION_TYPE | |
6686 | && !funcdef_flag)) | |
52ffd86e MS |
6687 | && variably_modified_type_p (type, NULL_TREE)) |
6688 | { | |
6689 | /* C99 6.7.5.2p2 */ | |
92f6fd0b | 6690 | if (TREE_CODE (type) == FUNCTION_TYPE) |
c2255bc4 | 6691 | error_at (loc, "non-nested function with variably modified type"); |
92f6fd0b | 6692 | else |
c2255bc4 AH |
6693 | error_at (loc, "object with variably modified type must have " |
6694 | "no linkage"); | |
52ffd86e MS |
6695 | } |
6696 | ||
51e29401 RS |
6697 | /* Record `register' declaration for warnings on & |
6698 | and in case doing stupid register allocation. */ | |
6699 | ||
9a26d6ee | 6700 | if (storage_class == csc_register) |
5baeaac0 JM |
6701 | { |
6702 | C_DECL_REGISTER (decl) = 1; | |
6703 | DECL_REGISTER (decl) = 1; | |
6704 | } | |
51e29401 RS |
6705 | |
6706 | /* Record constancy and volatility. */ | |
3932261a | 6707 | c_apply_type_quals_to_decl (type_quals, decl); |
51e29401 | 6708 | |
d19fa6b5 JM |
6709 | /* Apply _Alignas specifiers. */ |
6710 | if (alignas_align) | |
6711 | { | |
6712 | DECL_ALIGN (decl) = alignas_align * BITS_PER_UNIT; | |
6713 | DECL_USER_ALIGN (decl) = 1; | |
6714 | } | |
6715 | ||
51e29401 RS |
6716 | /* If a type has volatile components, it should be stored in memory. |
6717 | Otherwise, the fact that those components are volatile | |
820cc88f DB |
6718 | will be ignored, and would even crash the compiler. |
6719 | Of course, this only makes sense on VAR,PARM, and RESULT decl's. */ | |
6720 | if (C_TYPE_FIELDS_VOLATILE (TREE_TYPE (decl)) | |
6721 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL | |
6722 | || TREE_CODE (decl) == RESULT_DECL)) | |
5baeaac0 JM |
6723 | { |
6724 | /* It is not an error for a structure with volatile fields to | |
6725 | be declared register, but reset DECL_REGISTER since it | |
6726 | cannot actually go in a register. */ | |
6727 | int was_reg = C_DECL_REGISTER (decl); | |
6728 | C_DECL_REGISTER (decl) = 0; | |
6729 | DECL_REGISTER (decl) = 0; | |
6730 | c_mark_addressable (decl); | |
6731 | C_DECL_REGISTER (decl) = was_reg; | |
6732 | } | |
51e29401 | 6733 | |
d05cc98e GK |
6734 | /* This is the earliest point at which we might know the assembler |
6735 | name of a variable. Thus, if it's known before this, die horribly. */ | |
366de0ce | 6736 | gcc_assert (!DECL_ASSEMBLER_NAME_SET_P (decl)); |
d05cc98e | 6737 | |
88eeff6f ILT |
6738 | if (warn_cxx_compat |
6739 | && TREE_CODE (decl) == VAR_DECL | |
6740 | && TREE_PUBLIC (decl) | |
6741 | && TREE_STATIC (decl) | |
6742 | && (TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE | |
6743 | || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE | |
6744 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
6745 | && TYPE_NAME (TREE_TYPE (decl)) == NULL_TREE) | |
6746 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
6747 | ("non-local variable %qD with anonymous type is " | |
6748 | "questionable in C++"), | |
6749 | decl); | |
6750 | ||
51e29401 RS |
6751 | return decl; |
6752 | } | |
6753 | } | |
6754 | \f | |
51e29401 | 6755 | /* Decode the parameter-list info for a function type or function definition. |
52ffd86e | 6756 | The argument is the value returned by `get_parm_info' (or made in c-parse.c |
51e29401 RS |
6757 | if there is an identifier list instead of a parameter decl list). |
6758 | These two functions are separate because when a function returns | |
6759 | or receives functions then each is called multiple times but the order | |
6760 | of calls is different. The last call to `grokparms' is always the one | |
6761 | that contains the formal parameter names of a function definition. | |
6762 | ||
51e29401 RS |
6763 | Return a list of arg types to use in the FUNCTION_TYPE for this function. |
6764 | ||
60919bce | 6765 | FUNCDEF_FLAG is true for a function definition, false for |
51e29401 | 6766 | a mere declaration. A nonempty identifier-list gets an error message |
60919bce | 6767 | when FUNCDEF_FLAG is false. */ |
51e29401 RS |
6768 | |
6769 | static tree | |
f8893e47 | 6770 | grokparms (struct c_arg_info *arg_info, bool funcdef_flag) |
51e29401 | 6771 | { |
f8893e47 | 6772 | tree arg_types = arg_info->types; |
51e29401 | 6773 | |
52ffd86e MS |
6774 | if (funcdef_flag && arg_info->had_vla_unspec) |
6775 | { | |
6776 | /* A function definition isn't function prototype scope C99 6.2.1p4. */ | |
6777 | /* C99 6.7.5.2p4 */ | |
6778 | error ("%<[*]%> not allowed in other than function prototype scope"); | |
6779 | } | |
6780 | ||
8400e75e DM |
6781 | if (arg_types == 0 && !funcdef_flag |
6782 | && !in_system_header_at (input_location)) | |
3176a0c2 DD |
6783 | warning (OPT_Wstrict_prototypes, |
6784 | "function declaration isn%'t a prototype"); | |
51e29401 | 6785 | |
f75fbaf7 ZW |
6786 | if (arg_types == error_mark_node) |
6787 | return 0; /* don't set TYPE_ARG_TYPES in this case */ | |
6788 | ||
6789 | else if (arg_types && TREE_CODE (TREE_VALUE (arg_types)) == IDENTIFIER_NODE) | |
51e29401 | 6790 | { |
3f75a254 | 6791 | if (!funcdef_flag) |
aa3ef09b NF |
6792 | { |
6793 | pedwarn (input_location, 0, "parameter names (without types) in function declaration"); | |
6794 | arg_info->parms = NULL_TREE; | |
6795 | } | |
6796 | else | |
6797 | arg_info->parms = arg_info->types; | |
51e29401 | 6798 | |
f8893e47 | 6799 | arg_info->types = 0; |
51e29401 RS |
6800 | return 0; |
6801 | } | |
6802 | else | |
6803 | { | |
77dbdb57 ZW |
6804 | tree parm, type, typelt; |
6805 | unsigned int parmno; | |
40449a90 | 6806 | const char *errmsg; |
77dbdb57 | 6807 | |
bba5733f JM |
6808 | /* If there is a parameter of incomplete type in a definition, |
6809 | this is an error. In a declaration this is valid, and a | |
6810 | struct or union type may be completed later, before any calls | |
6811 | or definition of the function. In the case where the tag was | |
6812 | first declared within the parameter list, a warning has | |
6813 | already been given. If a parameter has void type, then | |
6814 | however the function cannot be defined or called, so | |
6815 | warn. */ | |
77dbdb57 | 6816 | |
f8893e47 | 6817 | for (parm = arg_info->parms, typelt = arg_types, parmno = 1; |
eb1dfbb2 | 6818 | parm; |
910ad8de | 6819 | parm = DECL_CHAIN (parm), typelt = TREE_CHAIN (typelt), parmno++) |
77dbdb57 ZW |
6820 | { |
6821 | type = TREE_VALUE (typelt); | |
6822 | if (type == error_mark_node) | |
6823 | continue; | |
6824 | ||
6825 | if (!COMPLETE_TYPE_P (type)) | |
6826 | { | |
6827 | if (funcdef_flag) | |
6828 | { | |
6829 | if (DECL_NAME (parm)) | |
c5d75364 MLI |
6830 | error_at (input_location, |
6831 | "parameter %u (%q+D) has incomplete type", | |
6832 | parmno, parm); | |
77dbdb57 | 6833 | else |
c5d75364 MLI |
6834 | error_at (DECL_SOURCE_LOCATION (parm), |
6835 | "parameter %u has incomplete type", | |
6836 | parmno); | |
51e29401 | 6837 | |
77dbdb57 ZW |
6838 | TREE_VALUE (typelt) = error_mark_node; |
6839 | TREE_TYPE (parm) = error_mark_node; | |
e49a760f | 6840 | arg_types = NULL_TREE; |
77dbdb57 | 6841 | } |
bba5733f | 6842 | else if (VOID_TYPE_P (type)) |
77dbdb57 ZW |
6843 | { |
6844 | if (DECL_NAME (parm)) | |
c5d75364 MLI |
6845 | warning_at (input_location, 0, |
6846 | "parameter %u (%q+D) has void type", | |
6847 | parmno, parm); | |
77dbdb57 | 6848 | else |
c5d75364 MLI |
6849 | warning_at (DECL_SOURCE_LOCATION (parm), 0, |
6850 | "parameter %u has void type", | |
6851 | parmno); | |
77dbdb57 ZW |
6852 | } |
6853 | } | |
7c47d6e9 | 6854 | |
40449a90 SL |
6855 | errmsg = targetm.invalid_parameter_type (type); |
6856 | if (errmsg) | |
6857 | { | |
6858 | error (errmsg); | |
6859 | TREE_VALUE (typelt) = error_mark_node; | |
6860 | TREE_TYPE (parm) = error_mark_node; | |
e49a760f | 6861 | arg_types = NULL_TREE; |
40449a90 SL |
6862 | } |
6863 | ||
7c47d6e9 JM |
6864 | if (DECL_NAME (parm) && TREE_USED (parm)) |
6865 | warn_if_shadowing (parm); | |
77dbdb57 ZW |
6866 | } |
6867 | return arg_types; | |
51e29401 RS |
6868 | } |
6869 | } | |
6870 | ||
b3399d18 NF |
6871 | /* Allocate and initialize a c_arg_info structure from the parser's |
6872 | obstack. */ | |
6873 | ||
6874 | struct c_arg_info * | |
6875 | build_arg_info (void) | |
6876 | { | |
6877 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
6878 | ret->parms = NULL_TREE; | |
6879 | ret->tags = NULL; | |
6880 | ret->types = NULL_TREE; | |
6881 | ret->others = NULL_TREE; | |
6882 | ret->pending_sizes = NULL; | |
6883 | ret->had_vla_unspec = 0; | |
6884 | return ret; | |
6885 | } | |
6886 | ||
f8893e47 JM |
6887 | /* Take apart the current scope and return a c_arg_info structure with |
6888 | info on a parameter list just parsed. | |
77dbdb57 | 6889 | |
f8893e47 | 6890 | This structure is later fed to 'grokparms' and 'store_parm_decls'. |
51e29401 | 6891 | |
f75fbaf7 | 6892 | ELLIPSIS being true means the argument list ended in '...' so don't |
a04a722b JM |
6893 | append a sentinel (void_list_node) to the end of the type-list. |
6894 | ||
6895 | EXPR is NULL or an expression that needs to be evaluated for the | |
6896 | side effects of array size expressions in the parameters. */ | |
51e29401 | 6897 | |
f8893e47 | 6898 | struct c_arg_info * |
a04a722b | 6899 | get_parm_info (bool ellipsis, tree expr) |
51e29401 | 6900 | { |
f75fbaf7 | 6901 | struct c_binding *b = current_scope->bindings; |
b3399d18 NF |
6902 | struct c_arg_info *arg_info = build_arg_info (); |
6903 | ||
f75fbaf7 | 6904 | tree parms = 0; |
9771b263 | 6905 | vec<c_arg_tag, va_gc> *tags = NULL; |
f75fbaf7 ZW |
6906 | tree types = 0; |
6907 | tree others = 0; | |
6908 | ||
55d54003 ZW |
6909 | static bool explained_incomplete_types = false; |
6910 | bool gave_void_only_once_err = false; | |
6911 | ||
52ffd86e | 6912 | arg_info->had_vla_unspec = current_scope->had_vla_unspec; |
f8893e47 | 6913 | |
f75fbaf7 ZW |
6914 | /* The bindings in this scope must not get put into a block. |
6915 | We will take care of deleting the binding nodes. */ | |
6916 | current_scope->bindings = 0; | |
51e29401 | 6917 | |
f75fbaf7 ZW |
6918 | /* This function is only called if there was *something* on the |
6919 | parameter list. */ | |
366de0ce | 6920 | gcc_assert (b); |
55d54003 | 6921 | |
f75fbaf7 ZW |
6922 | /* A parameter list consisting solely of 'void' indicates that the |
6923 | function takes no arguments. But if the 'void' is qualified | |
6924 | (by 'const' or 'volatile'), or has a storage class specifier | |
6925 | ('register'), then the behavior is undefined; issue an error. | |
6926 | Typedefs for 'void' are OK (see DR#157). */ | |
c22cacf3 | 6927 | if (b->prev == 0 /* one binding */ |
f75fbaf7 ZW |
6928 | && TREE_CODE (b->decl) == PARM_DECL /* which is a parameter */ |
6929 | && !DECL_NAME (b->decl) /* anonymous */ | |
6930 | && VOID_TYPE_P (TREE_TYPE (b->decl))) /* of void type */ | |
6931 | { | |
267bac10 | 6932 | if (TYPE_QUALS (TREE_TYPE (b->decl)) != TYPE_UNQUALIFIED |
5baeaac0 | 6933 | || C_DECL_REGISTER (b->decl)) |
bda67431 | 6934 | error ("%<void%> as only parameter may not be qualified"); |
55d54003 | 6935 | |
f75fbaf7 ZW |
6936 | /* There cannot be an ellipsis. */ |
6937 | if (ellipsis) | |
bda67431 | 6938 | error ("%<void%> must be the only parameter"); |
51e29401 | 6939 | |
f8893e47 | 6940 | arg_info->types = void_list_node; |
f75fbaf7 | 6941 | return arg_info; |
51e29401 RS |
6942 | } |
6943 | ||
f75fbaf7 ZW |
6944 | if (!ellipsis) |
6945 | types = void_list_node; | |
51e29401 | 6946 | |
f75fbaf7 ZW |
6947 | /* Break up the bindings list into parms, tags, types, and others; |
6948 | apply sanity checks; purge the name-to-decl bindings. */ | |
6949 | while (b) | |
51e29401 | 6950 | { |
f75fbaf7 ZW |
6951 | tree decl = b->decl; |
6952 | tree type = TREE_TYPE (decl); | |
f32682ca | 6953 | c_arg_tag tag; |
55d54003 | 6954 | const char *keyword; |
55d54003 | 6955 | |
f75fbaf7 | 6956 | switch (TREE_CODE (decl)) |
6645c3fa | 6957 | { |
f75fbaf7 ZW |
6958 | case PARM_DECL: |
6959 | if (b->id) | |
6960 | { | |
366de0ce | 6961 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 ZW |
6962 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
6963 | } | |
55d54003 | 6964 | |
f75fbaf7 ZW |
6965 | /* Check for forward decls that never got their actual decl. */ |
6966 | if (TREE_ASM_WRITTEN (decl)) | |
dee15844 | 6967 | error ("parameter %q+D has just a forward declaration", decl); |
f75fbaf7 ZW |
6968 | /* Check for (..., void, ...) and issue an error. */ |
6969 | else if (VOID_TYPE_P (type) && !DECL_NAME (decl)) | |
6970 | { | |
6971 | if (!gave_void_only_once_err) | |
6972 | { | |
bda67431 | 6973 | error ("%<void%> must be the only parameter"); |
f75fbaf7 ZW |
6974 | gave_void_only_once_err = true; |
6975 | } | |
6976 | } | |
6977 | else | |
6978 | { | |
6979 | /* Valid parameter, add it to the list. */ | |
910ad8de | 6980 | DECL_CHAIN (decl) = parms; |
f75fbaf7 ZW |
6981 | parms = decl; |
6982 | ||
6983 | /* Since there is a prototype, args are passed in their | |
6984 | declared types. The back end may override this later. */ | |
6985 | DECL_ARG_TYPE (decl) = type; | |
6986 | types = tree_cons (0, type, types); | |
6987 | } | |
6988 | break; | |
55d54003 | 6989 | |
56141a6a | 6990 | case ENUMERAL_TYPE: keyword = "enum"; goto tag; |
f75fbaf7 | 6991 | case UNION_TYPE: keyword = "union"; goto tag; |
56141a6a | 6992 | case RECORD_TYPE: keyword = "struct"; goto tag; |
f75fbaf7 ZW |
6993 | tag: |
6994 | /* Types may not have tag-names, in which case the type | |
6995 | appears in the bindings list with b->id NULL. */ | |
6996 | if (b->id) | |
6997 | { | |
366de0ce | 6998 | gcc_assert (I_TAG_BINDING (b->id) == b); |
f75fbaf7 ZW |
6999 | I_TAG_BINDING (b->id) = b->shadowed; |
7000 | } | |
55d54003 | 7001 | |
f75fbaf7 ZW |
7002 | /* Warn about any struct, union or enum tags defined in a |
7003 | parameter list. The scope of such types is limited to | |
7004 | the parameter list, which is rarely if ever desirable | |
7005 | (it's impossible to call such a function with type- | |
7006 | correct arguments). An anonymous union parm type is | |
7007 | meaningful as a GNU extension, so don't warn for that. */ | |
7008 | if (TREE_CODE (decl) != UNION_TYPE || b->id != 0) | |
7009 | { | |
7010 | if (b->id) | |
7011 | /* The %s will be one of 'struct', 'union', or 'enum'. */ | |
d4ee4d25 | 7012 | warning (0, "%<%s %E%> declared inside parameter list", |
f75fbaf7 ZW |
7013 | keyword, b->id); |
7014 | else | |
7015 | /* The %s will be one of 'struct', 'union', or 'enum'. */ | |
d4ee4d25 | 7016 | warning (0, "anonymous %s declared inside parameter list", |
f75fbaf7 | 7017 | keyword); |
118a3a8b | 7018 | |
3f75a254 | 7019 | if (!explained_incomplete_types) |
f75fbaf7 | 7020 | { |
d4ee4d25 | 7021 | warning (0, "its scope is only this definition or declaration," |
f75fbaf7 ZW |
7022 | " which is probably not what you want"); |
7023 | explained_incomplete_types = true; | |
7024 | } | |
7025 | } | |
55d54003 | 7026 | |
f32682ca DN |
7027 | tag.id = b->id; |
7028 | tag.type = decl; | |
9771b263 | 7029 | vec_safe_push (tags, tag); |
f75fbaf7 ZW |
7030 | break; |
7031 | ||
7032 | case CONST_DECL: | |
7033 | case TYPE_DECL: | |
ee060229 | 7034 | case FUNCTION_DECL: |
f75fbaf7 ZW |
7035 | /* CONST_DECLs appear here when we have an embedded enum, |
7036 | and TYPE_DECLs appear here when we have an embedded struct | |
7037 | or union. No warnings for this - we already warned about the | |
ee060229 JM |
7038 | type itself. FUNCTION_DECLs appear when there is an implicit |
7039 | function declaration in the parameter list. */ | |
7040 | ||
10e76c1a JM |
7041 | /* When we reinsert this decl in the function body, we need |
7042 | to reconstruct whether it was marked as nested. */ | |
7043 | gcc_assert (TREE_CODE (decl) == FUNCTION_DECL | |
7044 | ? b->nested | |
7045 | : !b->nested); | |
910ad8de | 7046 | DECL_CHAIN (decl) = others; |
18d5f982 ZW |
7047 | others = decl; |
7048 | /* fall through */ | |
7049 | ||
7050 | case ERROR_MARK: | |
7051 | /* error_mark_node appears here when we have an undeclared | |
7052 | variable. Just throw it away. */ | |
f75fbaf7 ZW |
7053 | if (b->id) |
7054 | { | |
366de0ce | 7055 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 ZW |
7056 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
7057 | } | |
f75fbaf7 ZW |
7058 | break; |
7059 | ||
7060 | /* Other things that might be encountered. */ | |
7061 | case LABEL_DECL: | |
f75fbaf7 | 7062 | case VAR_DECL: |
f75fbaf7 | 7063 | default: |
366de0ce | 7064 | gcc_unreachable (); |
f75fbaf7 ZW |
7065 | } |
7066 | ||
7067 | b = free_binding_and_advance (b); | |
55d54003 ZW |
7068 | } |
7069 | ||
f8893e47 JM |
7070 | arg_info->parms = parms; |
7071 | arg_info->tags = tags; | |
7072 | arg_info->types = types; | |
7073 | arg_info->others = others; | |
a04a722b | 7074 | arg_info->pending_sizes = expr; |
f75fbaf7 | 7075 | return arg_info; |
51e29401 RS |
7076 | } |
7077 | \f | |
7078 | /* Get the struct, enum or union (CODE says which) with tag NAME. | |
c2255bc4 AH |
7079 | Define the tag as a forward-reference with location LOC if it is |
7080 | not defined. Return a c_typespec structure for the type | |
7081 | specifier. */ | |
51e29401 | 7082 | |
81da229b | 7083 | struct c_typespec |
c2255bc4 | 7084 | parser_xref_tag (location_t loc, enum tree_code code, tree name) |
51e29401 | 7085 | { |
81da229b | 7086 | struct c_typespec ret; |
928c19bb | 7087 | tree ref; |
24b97832 | 7088 | location_t refloc; |
928c19bb JM |
7089 | |
7090 | ret.expr = NULL_TREE; | |
7091 | ret.expr_const_operands = true; | |
7092 | ||
51e29401 RS |
7093 | /* If a cross reference is requested, look up the type |
7094 | already defined for this tag and return it. */ | |
7095 | ||
24b97832 | 7096 | ref = lookup_tag (code, name, 0, &refloc); |
f18b70f5 JM |
7097 | /* If this is the right type of tag, return what we found. |
7098 | (This reference will be shadowed by shadow_tag later if appropriate.) | |
7099 | If this is the wrong type of tag, do not return it. If it was the | |
f8521984 ZW |
7100 | wrong type in the same scope, we will have had an error |
7101 | message already; if in a different scope and declaring | |
f18b70f5 | 7102 | a name, pending_xref_error will give an error message; but if in a |
f8521984 | 7103 | different scope and not declaring a name, this tag should |
f18b70f5 JM |
7104 | shadow the previous declaration of a different type of tag, and |
7105 | this would not work properly if we return the reference found. | |
7106 | (For example, with "struct foo" in an outer scope, "union foo;" | |
7107 | must shadow that tag with a new one of union type.) */ | |
81da229b | 7108 | ret.kind = (ref ? ctsk_tagref : ctsk_tagfirstref); |
f18b70f5 | 7109 | if (ref && TREE_CODE (ref) == code) |
81da229b | 7110 | { |
24b97832 ILT |
7111 | if (C_TYPE_DEFINED_IN_STRUCT (ref) |
7112 | && loc != UNKNOWN_LOCATION | |
7113 | && warn_cxx_compat) | |
7114 | { | |
7115 | switch (code) | |
7116 | { | |
7117 | case ENUMERAL_TYPE: | |
7118 | warning_at (loc, OPT_Wc___compat, | |
7119 | ("enum type defined in struct or union " | |
7120 | "is not visible in C++")); | |
7121 | inform (refloc, "enum type defined here"); | |
7122 | break; | |
7123 | case RECORD_TYPE: | |
7124 | warning_at (loc, OPT_Wc___compat, | |
7125 | ("struct defined in struct or union " | |
7126 | "is not visible in C++")); | |
7127 | inform (refloc, "struct defined here"); | |
7128 | break; | |
7129 | case UNION_TYPE: | |
7130 | warning_at (loc, OPT_Wc___compat, | |
7131 | ("union defined in struct or union " | |
7132 | "is not visible in C++")); | |
7133 | inform (refloc, "union defined here"); | |
7134 | break; | |
7135 | default: | |
7136 | gcc_unreachable(); | |
7137 | } | |
7138 | } | |
7139 | ||
81da229b JM |
7140 | ret.spec = ref; |
7141 | return ret; | |
7142 | } | |
51e29401 | 7143 | |
51e29401 RS |
7144 | /* If no such tag is yet defined, create a forward-reference node |
7145 | and record it as the "definition". | |
7146 | When a real declaration of this type is found, | |
7147 | the forward-reference will be altered into a real type. */ | |
7148 | ||
7149 | ref = make_node (code); | |
7150 | if (code == ENUMERAL_TYPE) | |
7151 | { | |
51e29401 RS |
7152 | /* Give the type a default layout like unsigned int |
7153 | to avoid crashing if it does not get defined. */ | |
179d2f74 | 7154 | SET_TYPE_MODE (ref, TYPE_MODE (unsigned_type_node)); |
51e29401 | 7155 | TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node); |
11cf4d18 | 7156 | TYPE_USER_ALIGN (ref) = 0; |
8df83eae | 7157 | TYPE_UNSIGNED (ref) = 1; |
51e29401 RS |
7158 | TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node); |
7159 | TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node); | |
7160 | TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node); | |
7161 | } | |
7162 | ||
c2255bc4 | 7163 | pushtag (loc, name, ref); |
51e29401 | 7164 | |
81da229b JM |
7165 | ret.spec = ref; |
7166 | return ret; | |
7167 | } | |
7168 | ||
7169 | /* Get the struct, enum or union (CODE says which) with tag NAME. | |
7170 | Define the tag as a forward-reference if it is not defined. | |
7171 | Return a tree for the type. */ | |
7172 | ||
7173 | tree | |
7174 | xref_tag (enum tree_code code, tree name) | |
7175 | { | |
c2255bc4 | 7176 | return parser_xref_tag (input_location, code, name).spec; |
51e29401 RS |
7177 | } |
7178 | \f | |
f8521984 | 7179 | /* Make sure that the tag NAME is defined *in the current scope* |
51e29401 | 7180 | at least as a forward reference. |
c2255bc4 | 7181 | LOC is the location of the struct's definition. |
24b97832 ILT |
7182 | CODE says which kind of tag NAME ought to be. |
7183 | ||
dc491a25 ILT |
7184 | This stores the current value of the file static STRUCT_PARSE_INFO |
7185 | in *ENCLOSING_STRUCT_PARSE_INFO, and points STRUCT_PARSE_INFO at a | |
7186 | new c_struct_parse_info structure. The old value of | |
7187 | STRUCT_PARSE_INFO is restored in finish_struct. */ | |
51e29401 RS |
7188 | |
7189 | tree | |
c2255bc4 | 7190 | start_struct (location_t loc, enum tree_code code, tree name, |
dc491a25 | 7191 | struct c_struct_parse_info **enclosing_struct_parse_info) |
51e29401 | 7192 | { |
f8521984 | 7193 | /* If there is already a tag defined at this scope |
51e29401 RS |
7194 | (as a forward reference), just return it. */ |
7195 | ||
24b97832 ILT |
7196 | tree ref = NULL_TREE; |
7197 | location_t refloc = UNKNOWN_LOCATION; | |
51e29401 | 7198 | |
24b97832 ILT |
7199 | if (name != NULL_TREE) |
7200 | ref = lookup_tag (code, name, 1, &refloc); | |
51e29401 RS |
7201 | if (ref && TREE_CODE (ref) == code) |
7202 | { | |
085e33aa | 7203 | if (TYPE_SIZE (ref)) |
c22cacf3 | 7204 | { |
53fcdc76 | 7205 | if (code == UNION_TYPE) |
24b97832 | 7206 | error_at (loc, "redefinition of %<union %E%>", name); |
c22cacf3 | 7207 | else |
24b97832 ILT |
7208 | error_at (loc, "redefinition of %<struct %E%>", name); |
7209 | if (refloc != UNKNOWN_LOCATION) | |
7210 | inform (refloc, "originally defined here"); | |
a03813c8 SE |
7211 | /* Don't create structures using a name already in use. */ |
7212 | ref = NULL_TREE; | |
35b1a6fa | 7213 | } |
085e33aa JM |
7214 | else if (C_TYPE_BEING_DEFINED (ref)) |
7215 | { | |
7216 | if (code == UNION_TYPE) | |
24b97832 | 7217 | error_at (loc, "nested redefinition of %<union %E%>", name); |
c22cacf3 | 7218 | else |
24b97832 ILT |
7219 | error_at (loc, "nested redefinition of %<struct %E%>", name); |
7220 | /* Don't bother to report "originally defined here" for a | |
7221 | nested redefinition; the original definition should be | |
7222 | obvious. */ | |
71113fcd GK |
7223 | /* Don't create structures that contain themselves. */ |
7224 | ref = NULL_TREE; | |
085e33aa | 7225 | } |
51e29401 RS |
7226 | } |
7227 | ||
71113fcd GK |
7228 | /* Otherwise create a forward-reference just so the tag is in scope. */ |
7229 | ||
7230 | if (ref == NULL_TREE || TREE_CODE (ref) != code) | |
7231 | { | |
5326cd3d | 7232 | ref = make_node (code); |
c2255bc4 | 7233 | pushtag (loc, name, ref); |
5326cd3d | 7234 | } |
35b1a6fa | 7235 | |
51e29401 | 7236 | C_TYPE_BEING_DEFINED (ref) = 1; |
02eb6e90 | 7237 | TYPE_PACKED (ref) = flag_pack_struct; |
24b97832 | 7238 | |
dc491a25 ILT |
7239 | *enclosing_struct_parse_info = struct_parse_info; |
7240 | struct_parse_info = XNEW (struct c_struct_parse_info); | |
9771b263 DN |
7241 | struct_parse_info->struct_types.create (0); |
7242 | struct_parse_info->fields.create (0); | |
7243 | struct_parse_info->typedefs_seen.create (0); | |
24b97832 ILT |
7244 | |
7245 | /* FIXME: This will issue a warning for a use of a type defined | |
7246 | within a statement expr used within sizeof, et. al. This is not | |
7247 | terribly serious as C++ doesn't permit statement exprs within | |
7248 | sizeof anyhow. */ | |
7249 | if (warn_cxx_compat && (in_sizeof || in_typeof || in_alignof)) | |
7250 | warning_at (loc, OPT_Wc___compat, | |
7251 | "defining type in %qs expression is invalid in C++", | |
7252 | (in_sizeof | |
7253 | ? "sizeof" | |
7254 | : (in_typeof ? "typeof" : "alignof"))); | |
7255 | ||
51e29401 RS |
7256 | return ref; |
7257 | } | |
7258 | ||
f8893e47 | 7259 | /* Process the specs, declarator and width (NULL if omitted) |
51e29401 | 7260 | of a structure component, returning a FIELD_DECL node. |
2ff7cce4 | 7261 | WIDTH is non-NULL for bit-fields only, and is an INTEGER_CST node. |
b9baeecd | 7262 | DECL_ATTRS is as for grokdeclarator. |
51e29401 | 7263 | |
3d10ed6c AH |
7264 | LOC is the location of the structure component. |
7265 | ||
51e29401 RS |
7266 | This is done during the parsing of the struct declaration. |
7267 | The FIELD_DECL nodes are chained together and the lot of them | |
7268 | are ultimately passed to `build_struct' to make the RECORD_TYPE node. */ | |
7269 | ||
7270 | tree | |
3d10ed6c AH |
7271 | grokfield (location_t loc, |
7272 | struct c_declarator *declarator, struct c_declspecs *declspecs, | |
b9baeecd | 7273 | tree width, tree *decl_attrs) |
51e29401 RS |
7274 | { |
7275 | tree value; | |
7276 | ||
f8893e47 JM |
7277 | if (declarator->kind == cdk_id && declarator->u.id == NULL_TREE |
7278 | && width == NULL_TREE) | |
3e96a2fd | 7279 | { |
750491fc RH |
7280 | /* This is an unnamed decl. |
7281 | ||
7282 | If we have something of the form "union { list } ;" then this | |
7283 | is the anonymous union extension. Similarly for struct. | |
7284 | ||
7285 | If this is something of the form "struct foo;", then | |
478a1c5b ILT |
7286 | If MS or Plan 9 extensions are enabled, this is handled as |
7287 | an anonymous struct. | |
750491fc RH |
7288 | Otherwise this is a forward declaration of a structure tag. |
7289 | ||
7290 | If this is something of the form "foo;" and foo is a TYPE_DECL, then | |
4bdd0a60 | 7291 | If foo names a structure or union without a tag, then this |
48b0b196 | 7292 | is an anonymous struct (this is permitted by C11). |
478a1c5b ILT |
7293 | If MS or Plan 9 extensions are enabled and foo names a |
7294 | structure, then again this is an anonymous struct. | |
750491fc RH |
7295 | Otherwise this is an error. |
7296 | ||
95bd1dd7 | 7297 | Oh what a horrid tangled web we weave. I wonder if MS consciously |
750491fc RH |
7298 | took this from Plan 9 or if it was an accident of implementation |
7299 | that took root before someone noticed the bug... */ | |
7300 | ||
deb176fa | 7301 | tree type = declspecs->type; |
216a5f1b JM |
7302 | bool type_ok = (TREE_CODE (type) == RECORD_TYPE |
7303 | || TREE_CODE (type) == UNION_TYPE); | |
7304 | bool ok = false; | |
85d49058 | 7305 | |
ff8e2159 JM |
7306 | if (type_ok |
7307 | && (flag_ms_extensions | |
7308 | || flag_plan9_extensions | |
7309 | || !declspecs->typedef_p)) | |
750491fc | 7310 | { |
478a1c5b | 7311 | if (flag_ms_extensions || flag_plan9_extensions) |
216a5f1b | 7312 | ok = true; |
ff8e2159 | 7313 | else if (TYPE_NAME (type) == NULL) |
216a5f1b | 7314 | ok = true; |
750491fc | 7315 | else |
216a5f1b | 7316 | ok = false; |
750491fc | 7317 | } |
216a5f1b | 7318 | if (!ok) |
3e96a2fd | 7319 | { |
3d10ed6c | 7320 | pedwarn (loc, 0, "declaration does not declare anything"); |
3e96a2fd DD |
7321 | return NULL_TREE; |
7322 | } | |
35aff4fb MP |
7323 | if (flag_isoc99) |
7324 | pedwarn_c99 (loc, OPT_Wpedantic, | |
4bdd0a60 | 7325 | "ISO C99 doesn%'t support unnamed structs/unions"); |
35aff4fb MP |
7326 | else |
7327 | pedwarn_c99 (loc, OPT_Wpedantic, | |
4bdd0a60 | 7328 | "ISO C90 doesn%'t support unnamed structs/unions"); |
3e96a2fd DD |
7329 | } |
7330 | ||
60919bce | 7331 | value = grokdeclarator (declarator, declspecs, FIELD, false, |
928c19bb | 7332 | width ? &width : NULL, decl_attrs, NULL, NULL, |
b9baeecd | 7333 | DEPRECATED_NORMAL); |
51e29401 | 7334 | |
c2255bc4 | 7335 | finish_decl (value, loc, NULL_TREE, NULL_TREE, NULL_TREE); |
dfd48d76 | 7336 | DECL_INITIAL (value) = width; |
51e29401 | 7337 | |
dc491a25 ILT |
7338 | if (warn_cxx_compat && DECL_NAME (value) != NULL_TREE) |
7339 | { | |
7340 | /* If we currently have a binding for this field, set the | |
7341 | in_struct field in the binding, so that we warn about lookups | |
7342 | which find it. */ | |
7343 | struct c_binding *b = I_SYMBOL_BINDING (DECL_NAME (value)); | |
7344 | if (b != NULL) | |
7345 | { | |
7346 | /* If the in_struct field is not yet set, push it on a list | |
7347 | to be cleared when this struct is finished. */ | |
7348 | if (!b->in_struct) | |
7349 | { | |
9771b263 | 7350 | struct_parse_info->fields.safe_push (b); |
dc491a25 ILT |
7351 | b->in_struct = 1; |
7352 | } | |
7353 | } | |
7354 | } | |
7355 | ||
51e29401 RS |
7356 | return value; |
7357 | } | |
7358 | \f | |
478a1c5b ILT |
7359 | /* Subroutine of detect_field_duplicates: return whether X and Y, |
7360 | which are both fields in the same struct, have duplicate field | |
7361 | names. */ | |
7362 | ||
7363 | static bool | |
7364 | is_duplicate_field (tree x, tree y) | |
7365 | { | |
7366 | if (DECL_NAME (x) != NULL_TREE && DECL_NAME (x) == DECL_NAME (y)) | |
7367 | return true; | |
7368 | ||
7369 | /* When using -fplan9-extensions, an anonymous field whose name is a | |
7370 | typedef can duplicate a field name. */ | |
7371 | if (flag_plan9_extensions | |
7372 | && (DECL_NAME (x) == NULL_TREE || DECL_NAME (y) == NULL_TREE)) | |
7373 | { | |
7374 | tree xt, xn, yt, yn; | |
7375 | ||
7376 | xt = TREE_TYPE (x); | |
7377 | if (DECL_NAME (x) != NULL_TREE) | |
7378 | xn = DECL_NAME (x); | |
7379 | else if ((TREE_CODE (xt) == RECORD_TYPE || TREE_CODE (xt) == UNION_TYPE) | |
7380 | && TYPE_NAME (xt) != NULL_TREE | |
7381 | && TREE_CODE (TYPE_NAME (xt)) == TYPE_DECL) | |
7382 | xn = DECL_NAME (TYPE_NAME (xt)); | |
7383 | else | |
7384 | xn = NULL_TREE; | |
7385 | ||
7386 | yt = TREE_TYPE (y); | |
7387 | if (DECL_NAME (y) != NULL_TREE) | |
7388 | yn = DECL_NAME (y); | |
7389 | else if ((TREE_CODE (yt) == RECORD_TYPE || TREE_CODE (yt) == UNION_TYPE) | |
7390 | && TYPE_NAME (yt) != NULL_TREE | |
7391 | && TREE_CODE (TYPE_NAME (yt)) == TYPE_DECL) | |
7392 | yn = DECL_NAME (TYPE_NAME (yt)); | |
7393 | else | |
7394 | yn = NULL_TREE; | |
7395 | ||
7396 | if (xn != NULL_TREE && xn == yn) | |
7397 | return true; | |
7398 | } | |
7399 | ||
7400 | return false; | |
7401 | } | |
7402 | ||
492fc0ee JM |
7403 | /* Subroutine of detect_field_duplicates: add the fields of FIELDLIST |
7404 | to HTAB, giving errors for any duplicates. */ | |
7405 | ||
7406 | static void | |
703c8606 | 7407 | detect_field_duplicates_hash (tree fieldlist, |
c203e8a7 | 7408 | hash_table<pointer_hash <tree_node> > *htab) |
492fc0ee JM |
7409 | { |
7410 | tree x, y; | |
703c8606 | 7411 | tree_node **slot; |
492fc0ee | 7412 | |
910ad8de | 7413 | for (x = fieldlist; x ; x = DECL_CHAIN (x)) |
492fc0ee JM |
7414 | if ((y = DECL_NAME (x)) != 0) |
7415 | { | |
c203e8a7 | 7416 | slot = htab->find_slot (y, INSERT); |
492fc0ee JM |
7417 | if (*slot) |
7418 | { | |
7419 | error ("duplicate member %q+D", x); | |
7420 | DECL_NAME (x) = NULL_TREE; | |
7421 | } | |
7422 | *slot = y; | |
7423 | } | |
7424 | else if (TREE_CODE (TREE_TYPE (x)) == RECORD_TYPE | |
7425 | || TREE_CODE (TREE_TYPE (x)) == UNION_TYPE) | |
478a1c5b ILT |
7426 | { |
7427 | detect_field_duplicates_hash (TYPE_FIELDS (TREE_TYPE (x)), htab); | |
7428 | ||
7429 | /* When using -fplan9-extensions, an anonymous field whose | |
7430 | name is a typedef can duplicate a field name. */ | |
7431 | if (flag_plan9_extensions | |
7432 | && TYPE_NAME (TREE_TYPE (x)) != NULL_TREE | |
7433 | && TREE_CODE (TYPE_NAME (TREE_TYPE (x))) == TYPE_DECL) | |
7434 | { | |
7435 | tree xn = DECL_NAME (TYPE_NAME (TREE_TYPE (x))); | |
c203e8a7 | 7436 | slot = htab->find_slot (xn, INSERT); |
478a1c5b ILT |
7437 | if (*slot) |
7438 | error ("duplicate member %q+D", TYPE_NAME (TREE_TYPE (x))); | |
7439 | *slot = xn; | |
7440 | } | |
7441 | } | |
492fc0ee JM |
7442 | } |
7443 | ||
66ea6f4c RH |
7444 | /* Generate an error for any duplicate field names in FIELDLIST. Munge |
7445 | the list such that this does not present a problem later. */ | |
7446 | ||
7447 | static void | |
7448 | detect_field_duplicates (tree fieldlist) | |
7449 | { | |
7450 | tree x, y; | |
7451 | int timeout = 10; | |
7452 | ||
c0c24aa4 | 7453 | /* If the struct is the list of instance variables of an Objective-C |
0dc33c3c NP |
7454 | class, then we need to check all the instance variables of |
7455 | superclasses when checking for duplicates (since you can't have | |
c0c24aa4 | 7456 | an instance variable in a subclass with the same name as an |
0dc33c3c NP |
7457 | instance variable in a superclass). We pass on this job to the |
7458 | Objective-C compiler. objc_detect_field_duplicates() will return | |
7459 | false if we are not checking the list of instance variables and | |
7460 | the C frontend should proceed with the standard field duplicate | |
7461 | checks. If we are checking the list of instance variables, the | |
7462 | ObjC frontend will do the check, emit the errors if needed, and | |
7463 | then return true. */ | |
c0c24aa4 | 7464 | if (c_dialect_objc ()) |
0dc33c3c NP |
7465 | if (objc_detect_field_duplicates (false)) |
7466 | return; | |
c0c24aa4 | 7467 | |
66ea6f4c RH |
7468 | /* First, see if there are more than "a few" fields. |
7469 | This is trivially true if there are zero or one fields. */ | |
b3c1008c | 7470 | if (!fieldlist || !DECL_CHAIN (fieldlist)) |
66ea6f4c | 7471 | return; |
b3c1008c | 7472 | x = fieldlist; |
66ea6f4c RH |
7473 | do { |
7474 | timeout--; | |
492fc0ee JM |
7475 | if (DECL_NAME (x) == NULL_TREE |
7476 | && (TREE_CODE (TREE_TYPE (x)) == RECORD_TYPE | |
7477 | || TREE_CODE (TREE_TYPE (x)) == UNION_TYPE)) | |
7478 | timeout = 0; | |
910ad8de | 7479 | x = DECL_CHAIN (x); |
66ea6f4c RH |
7480 | } while (timeout > 0 && x); |
7481 | ||
492fc0ee JM |
7482 | /* If there were "few" fields and no anonymous structures or unions, |
7483 | avoid the overhead of allocating a hash table. Instead just do | |
7484 | the nested traversal thing. */ | |
66ea6f4c RH |
7485 | if (timeout > 0) |
7486 | { | |
f7587ed0 | 7487 | for (x = DECL_CHAIN (fieldlist); x; x = DECL_CHAIN (x)) |
478a1c5b ILT |
7488 | /* When using -fplan9-extensions, we can have duplicates |
7489 | between typedef names and fields. */ | |
7490 | if (DECL_NAME (x) | |
7491 | || (flag_plan9_extensions | |
7492 | && DECL_NAME (x) == NULL_TREE | |
7493 | && (TREE_CODE (TREE_TYPE (x)) == RECORD_TYPE | |
7494 | || TREE_CODE (TREE_TYPE (x)) == UNION_TYPE) | |
7495 | && TYPE_NAME (TREE_TYPE (x)) != NULL_TREE | |
7496 | && TREE_CODE (TYPE_NAME (TREE_TYPE (x))) == TYPE_DECL)) | |
66ea6f4c RH |
7497 | { |
7498 | for (y = fieldlist; y != x; y = TREE_CHAIN (y)) | |
478a1c5b | 7499 | if (is_duplicate_field (y, x)) |
66ea6f4c | 7500 | { |
dee15844 | 7501 | error ("duplicate member %q+D", x); |
66ea6f4c RH |
7502 | DECL_NAME (x) = NULL_TREE; |
7503 | } | |
7504 | } | |
7505 | } | |
7506 | else | |
7507 | { | |
c203e8a7 TS |
7508 | hash_table<pointer_hash <tree_node> > htab (37); |
7509 | detect_field_duplicates_hash (fieldlist, &htab); | |
66ea6f4c RH |
7510 | } |
7511 | } | |
7512 | ||
dc491a25 ILT |
7513 | /* Finish up struct info used by -Wc++-compat. */ |
7514 | ||
7515 | static void | |
7516 | warn_cxx_compat_finish_struct (tree fieldlist) | |
7517 | { | |
7518 | unsigned int ix; | |
7519 | tree x; | |
7520 | struct c_binding *b; | |
7521 | ||
7522 | /* Set the C_TYPE_DEFINED_IN_STRUCT flag for each type defined in | |
7523 | the current struct. We do this now at the end of the struct | |
7524 | because the flag is used to issue visibility warnings, and we | |
7525 | only want to issue those warnings if the type is referenced | |
7526 | outside of the struct declaration. */ | |
9771b263 | 7527 | FOR_EACH_VEC_ELT (struct_parse_info->struct_types, ix, x) |
dc491a25 ILT |
7528 | C_TYPE_DEFINED_IN_STRUCT (x) = 1; |
7529 | ||
7530 | /* The TYPEDEFS_SEEN field of STRUCT_PARSE_INFO is a list of | |
7531 | typedefs used when declaring fields in this struct. If the name | |
7532 | of any of the fields is also a typedef name then the struct would | |
7533 | not parse in C++, because the C++ lookup rules say that the | |
7534 | typedef name would be looked up in the context of the struct, and | |
7535 | would thus be the field rather than the typedef. */ | |
9771b263 | 7536 | if (!struct_parse_info->typedefs_seen.is_empty () |
dc491a25 ILT |
7537 | && fieldlist != NULL_TREE) |
7538 | { | |
6e2830c3 TS |
7539 | /* Use a hash_set<tree> using the name of the typedef. We can use |
7540 | a hash_set<tree> because identifiers are interned. */ | |
7541 | hash_set<tree> tset; | |
dc491a25 | 7542 | |
9771b263 | 7543 | FOR_EACH_VEC_ELT (struct_parse_info->typedefs_seen, ix, x) |
6e2830c3 | 7544 | tset.add (DECL_NAME (x)); |
dc491a25 | 7545 | |
910ad8de | 7546 | for (x = fieldlist; x != NULL_TREE; x = DECL_CHAIN (x)) |
dc491a25 | 7547 | { |
a75de692 | 7548 | if (DECL_NAME (x) != NULL_TREE |
6e2830c3 | 7549 | && tset.contains (DECL_NAME (x))) |
dc491a25 ILT |
7550 | { |
7551 | warning_at (DECL_SOURCE_LOCATION (x), OPT_Wc___compat, | |
7552 | ("using %qD as both field and typedef name is " | |
7553 | "invalid in C++"), | |
7554 | x); | |
7555 | /* FIXME: It would be nice to report the location where | |
7556 | the typedef name is used. */ | |
7557 | } | |
7558 | } | |
dc491a25 ILT |
7559 | } |
7560 | ||
7561 | /* For each field which has a binding and which was not defined in | |
7562 | an enclosing struct, clear the in_struct field. */ | |
9771b263 | 7563 | FOR_EACH_VEC_ELT (struct_parse_info->fields, ix, b) |
dc491a25 ILT |
7564 | b->in_struct = 0; |
7565 | } | |
7566 | ||
51e29401 | 7567 | /* Fill in the fields of a RECORD_TYPE or UNION_TYPE node, T. |
c2255bc4 | 7568 | LOC is the location of the RECORD_TYPE or UNION_TYPE's definition. |
7a0347ff | 7569 | FIELDLIST is a chain of FIELD_DECL nodes for the fields. |
24b97832 ILT |
7570 | ATTRIBUTES are attributes to be applied to the structure. |
7571 | ||
dc491a25 ILT |
7572 | ENCLOSING_STRUCT_PARSE_INFO is the value of STRUCT_PARSE_INFO when |
7573 | the struct was started. */ | |
51e29401 RS |
7574 | |
7575 | tree | |
c2255bc4 | 7576 | finish_struct (location_t loc, tree t, tree fieldlist, tree attributes, |
dc491a25 | 7577 | struct c_struct_parse_info *enclosing_struct_parse_info) |
51e29401 | 7578 | { |
b3694847 | 7579 | tree x; |
f75fbaf7 | 7580 | bool toplevel = file_scope == current_scope; |
ffc5c6a9 | 7581 | int saw_named_field; |
51e29401 RS |
7582 | |
7583 | /* If this type was previously laid out as a forward reference, | |
7584 | make sure we lay it out again. */ | |
7585 | ||
7586 | TYPE_SIZE (t) = 0; | |
7587 | ||
91d231cb | 7588 | decl_attributes (&t, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE); |
10861e9a | 7589 | |
9590fa72 RK |
7590 | if (pedantic) |
7591 | { | |
910ad8de | 7592 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
4bdd0a60 JM |
7593 | { |
7594 | if (DECL_NAME (x) != 0) | |
7595 | break; | |
48b0b196 | 7596 | if (flag_isoc11 |
4bdd0a60 JM |
7597 | && (TREE_CODE (TREE_TYPE (x)) == RECORD_TYPE |
7598 | || TREE_CODE (TREE_TYPE (x)) == UNION_TYPE)) | |
7599 | break; | |
7600 | } | |
9590fa72 RK |
7601 | |
7602 | if (x == 0) | |
cc0b9d52 JM |
7603 | { |
7604 | if (TREE_CODE (t) == UNION_TYPE) | |
7605 | { | |
7606 | if (fieldlist) | |
c1771a20 | 7607 | pedwarn (loc, OPT_Wpedantic, "union has no named members"); |
cc0b9d52 | 7608 | else |
c1771a20 | 7609 | pedwarn (loc, OPT_Wpedantic, "union has no members"); |
cc0b9d52 JM |
7610 | } |
7611 | else | |
7612 | { | |
7613 | if (fieldlist) | |
c1771a20 | 7614 | pedwarn (loc, OPT_Wpedantic, "struct has no named members"); |
cc0b9d52 | 7615 | else |
c1771a20 | 7616 | pedwarn (loc, OPT_Wpedantic, "struct has no members"); |
cc0b9d52 JM |
7617 | } |
7618 | } | |
9590fa72 | 7619 | } |
51e29401 | 7620 | |
dfd48d76 | 7621 | /* Install struct as DECL_CONTEXT of each field decl. |
bc15d0ef JM |
7622 | Also process specified field sizes, found in the DECL_INITIAL, |
7623 | storing 0 there after the type has been changed to precision equal | |
7624 | to its width, rather than the precision of the specified standard | |
7625 | type. (Correct layout requires the original type to have been preserved | |
7626 | until now.) */ | |
51e29401 | 7627 | |
ffc5c6a9 | 7628 | saw_named_field = 0; |
910ad8de | 7629 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
51e29401 | 7630 | { |
4271a6f3 VR |
7631 | if (TREE_TYPE (x) == error_mark_node) |
7632 | continue; | |
7633 | ||
51e29401 | 7634 | DECL_CONTEXT (x) = t; |
646c0835 | 7635 | |
51e29401 RS |
7636 | /* If any field is const, the structure type is pseudo-const. */ |
7637 | if (TREE_READONLY (x)) | |
7638 | C_TYPE_FIELDS_READONLY (t) = 1; | |
7639 | else | |
7640 | { | |
7641 | /* A field that is pseudo-const makes the structure likewise. */ | |
51f4ec66 | 7642 | tree t1 = strip_array_types (TREE_TYPE (x)); |
51e29401 RS |
7643 | if ((TREE_CODE (t1) == RECORD_TYPE || TREE_CODE (t1) == UNION_TYPE) |
7644 | && C_TYPE_FIELDS_READONLY (t1)) | |
7645 | C_TYPE_FIELDS_READONLY (t) = 1; | |
7646 | } | |
7647 | ||
7648 | /* Any field that is volatile means variables of this type must be | |
7649 | treated in some ways as volatile. */ | |
7650 | if (TREE_THIS_VOLATILE (x)) | |
7651 | C_TYPE_FIELDS_VOLATILE (t) = 1; | |
7652 | ||
7653 | /* Any field of nominal variable size implies structure is too. */ | |
7654 | if (C_DECL_VARIABLE_SIZE (x)) | |
7655 | C_TYPE_VARIABLE_SIZE (t) = 1; | |
7656 | ||
dfd48d76 NB |
7657 | if (DECL_INITIAL (x)) |
7658 | { | |
ae7e9ddd | 7659 | unsigned HOST_WIDE_INT width = tree_to_uhwi (DECL_INITIAL (x)); |
2ff7cce4 JM |
7660 | DECL_SIZE (x) = bitsize_int (width); |
7661 | DECL_BIT_FIELD (x) = 1; | |
7662 | SET_DECL_C_BIT_FIELD (x); | |
dfd48d76 NB |
7663 | } |
7664 | ||
2cd36c22 AN |
7665 | if (TYPE_PACKED (t) |
7666 | && (DECL_BIT_FIELD (x) | |
7667 | || TYPE_ALIGN (TREE_TYPE (x)) > BITS_PER_UNIT)) | |
7668 | DECL_PACKED (x) = 1; | |
7669 | ||
ffc5c6a9 RH |
7670 | /* Detect flexible array member in an invalid context. */ |
7671 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE | |
7672 | && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE | |
7673 | && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE | |
7674 | && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE) | |
7675 | { | |
7676 | if (TREE_CODE (t) == UNION_TYPE) | |
d915eec0 | 7677 | { |
c2255bc4 | 7678 | error_at (DECL_SOURCE_LOCATION (x), |
c5d75364 | 7679 | "flexible array member in union"); |
d915eec0 JJ |
7680 | TREE_TYPE (x) = error_mark_node; |
7681 | } | |
910ad8de | 7682 | else if (DECL_CHAIN (x) != NULL_TREE) |
d915eec0 | 7683 | { |
c2255bc4 | 7684 | error_at (DECL_SOURCE_LOCATION (x), |
c5d75364 | 7685 | "flexible array member not at end of struct"); |
d915eec0 JJ |
7686 | TREE_TYPE (x) = error_mark_node; |
7687 | } | |
3f75a254 | 7688 | else if (!saw_named_field) |
d915eec0 | 7689 | { |
c2255bc4 | 7690 | error_at (DECL_SOURCE_LOCATION (x), |
c5d75364 | 7691 | "flexible array member in otherwise empty struct"); |
d915eec0 JJ |
7692 | TREE_TYPE (x) = error_mark_node; |
7693 | } | |
ffc5c6a9 | 7694 | } |
2984fe64 | 7695 | |
c5d75364 | 7696 | if (pedantic && TREE_CODE (t) == RECORD_TYPE |
2984fe64 | 7697 | && flexible_array_type_p (TREE_TYPE (x))) |
c1771a20 | 7698 | pedwarn (DECL_SOURCE_LOCATION (x), OPT_Wpedantic, |
c5d75364 | 7699 | "invalid use of structure with flexible array member"); |
2984fe64 | 7700 | |
4bdd0a60 JM |
7701 | if (DECL_NAME (x) |
7702 | || TREE_CODE (TREE_TYPE (x)) == RECORD_TYPE | |
7703 | || TREE_CODE (TREE_TYPE (x)) == UNION_TYPE) | |
ffc5c6a9 | 7704 | saw_named_field = 1; |
05bccae2 | 7705 | } |
51e29401 | 7706 | |
66ea6f4c | 7707 | detect_field_duplicates (fieldlist); |
51e29401 RS |
7708 | |
7709 | /* Now we have the nearly final fieldlist. Record it, | |
7710 | then lay out the structure or union (including the fields). */ | |
7711 | ||
7712 | TYPE_FIELDS (t) = fieldlist; | |
7713 | ||
7714 | layout_type (t); | |
7715 | ||
26d40c3d JM |
7716 | if (TYPE_SIZE_UNIT (t) |
7717 | && TREE_CODE (TYPE_SIZE_UNIT (t)) == INTEGER_CST | |
7718 | && !TREE_OVERFLOW (TYPE_SIZE_UNIT (t)) | |
7719 | && !valid_constant_size_p (TYPE_SIZE_UNIT (t))) | |
7720 | error ("type %qT is too large", t); | |
7721 | ||
bc15d0ef | 7722 | /* Give bit-fields their proper types. */ |
6fbfac92 JM |
7723 | { |
7724 | tree *fieldlistp = &fieldlist; | |
07b983cd | 7725 | while (*fieldlistp) |
bc15d0ef JM |
7726 | if (TREE_CODE (*fieldlistp) == FIELD_DECL && DECL_INITIAL (*fieldlistp) |
7727 | && TREE_TYPE (*fieldlistp) != error_mark_node) | |
7728 | { | |
7729 | unsigned HOST_WIDE_INT width | |
ae7e9ddd | 7730 | = tree_to_uhwi (DECL_INITIAL (*fieldlistp)); |
bc15d0ef JM |
7731 | tree type = TREE_TYPE (*fieldlistp); |
7732 | if (width != TYPE_PRECISION (type)) | |
48cc8d3b RH |
7733 | { |
7734 | TREE_TYPE (*fieldlistp) | |
0b359b01 | 7735 | = c_build_bitfield_integer_type (width, TYPE_UNSIGNED (type)); |
48cc8d3b RH |
7736 | DECL_MODE (*fieldlistp) = TYPE_MODE (TREE_TYPE (*fieldlistp)); |
7737 | } | |
bc15d0ef JM |
7738 | DECL_INITIAL (*fieldlistp) = 0; |
7739 | } | |
6fbfac92 | 7740 | else |
910ad8de | 7741 | fieldlistp = &DECL_CHAIN (*fieldlistp); |
6fbfac92 | 7742 | } |
51e29401 | 7743 | |
ffc5c6a9 RH |
7744 | /* Now we have the truly final field list. |
7745 | Store it in this type and in the variants. */ | |
51e29401 RS |
7746 | |
7747 | TYPE_FIELDS (t) = fieldlist; | |
7748 | ||
d07605f5 | 7749 | /* If there are lots of fields, sort so we can look through them fast. |
6614fd40 | 7750 | We arbitrarily consider 16 or more elts to be "a lot". */ |
d07605f5 AP |
7751 | |
7752 | { | |
7753 | int len = 0; | |
7754 | ||
910ad8de | 7755 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
d07605f5 | 7756 | { |
c22cacf3 MS |
7757 | if (len > 15 || DECL_NAME (x) == NULL) |
7758 | break; | |
7759 | len += 1; | |
d07605f5 AP |
7760 | } |
7761 | ||
7762 | if (len > 15) | |
7763 | { | |
c22cacf3 MS |
7764 | tree *field_array; |
7765 | struct lang_type *space; | |
7766 | struct sorted_fields_type *space2; | |
e13e48e7 | 7767 | |
c22cacf3 | 7768 | len += list_length (x); |
e13e48e7 | 7769 | |
c22cacf3 MS |
7770 | /* Use the same allocation policy here that make_node uses, to |
7771 | ensure that this lives as long as the rest of the struct decl. | |
7772 | All decls in an inline function need to be saved. */ | |
e13e48e7 | 7773 | |
766090c2 TS |
7774 | space = ggc_cleared_alloc<struct lang_type> (); |
7775 | space2 = (sorted_fields_type *) ggc_internal_alloc | |
a9429e29 | 7776 | (sizeof (struct sorted_fields_type) + len * sizeof (tree)); |
e13e48e7 | 7777 | |
c22cacf3 | 7778 | len = 0; |
d07605f5 AP |
7779 | space->s = space2; |
7780 | field_array = &space2->elts[0]; | |
910ad8de | 7781 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
c22cacf3 MS |
7782 | { |
7783 | field_array[len++] = x; | |
7784 | ||
7785 | /* If there is anonymous struct or union, break out of the loop. */ | |
7786 | if (DECL_NAME (x) == NULL) | |
7787 | break; | |
7788 | } | |
7789 | /* Found no anonymous struct/union. Add the TYPE_LANG_SPECIFIC. */ | |
7790 | if (x == NULL) | |
7791 | { | |
7792 | TYPE_LANG_SPECIFIC (t) = space; | |
7793 | TYPE_LANG_SPECIFIC (t)->s->len = len; | |
7794 | field_array = TYPE_LANG_SPECIFIC (t)->s->elts; | |
7795 | qsort (field_array, len, sizeof (tree), field_decl_cmp); | |
7796 | } | |
d07605f5 AP |
7797 | } |
7798 | } | |
e13e48e7 | 7799 | |
51e29401 RS |
7800 | for (x = TYPE_MAIN_VARIANT (t); x; x = TYPE_NEXT_VARIANT (x)) |
7801 | { | |
7802 | TYPE_FIELDS (x) = TYPE_FIELDS (t); | |
7803 | TYPE_LANG_SPECIFIC (x) = TYPE_LANG_SPECIFIC (t); | |
692a7aa3 JM |
7804 | C_TYPE_FIELDS_READONLY (x) = C_TYPE_FIELDS_READONLY (t); |
7805 | C_TYPE_FIELDS_VOLATILE (x) = C_TYPE_FIELDS_VOLATILE (t); | |
7806 | C_TYPE_VARIABLE_SIZE (x) = C_TYPE_VARIABLE_SIZE (t); | |
51e29401 RS |
7807 | } |
7808 | ||
1604422c RK |
7809 | /* If this was supposed to be a transparent union, but we can't |
7810 | make it one, warn and turn off the flag. */ | |
7811 | if (TREE_CODE (t) == UNION_TYPE | |
ebf0bf7f | 7812 | && TYPE_TRANSPARENT_AGGR (t) |
eb3490b9 | 7813 | && (!TYPE_FIELDS (t) || TYPE_MODE (t) != DECL_MODE (TYPE_FIELDS (t)))) |
1604422c | 7814 | { |
ebf0bf7f | 7815 | TYPE_TRANSPARENT_AGGR (t) = 0; |
c2255bc4 | 7816 | warning_at (loc, 0, "union cannot be made transparent"); |
1604422c RK |
7817 | } |
7818 | ||
51e29401 RS |
7819 | /* If this structure or union completes the type of any previous |
7820 | variable declaration, lay it out and output its rtl. */ | |
bf7a697f ZW |
7821 | for (x = C_TYPE_INCOMPLETE_VARS (TYPE_MAIN_VARIANT (t)); |
7822 | x; | |
7823 | x = TREE_CHAIN (x)) | |
51e29401 | 7824 | { |
bf7a697f ZW |
7825 | tree decl = TREE_VALUE (x); |
7826 | if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
7827 | layout_array_type (TREE_TYPE (decl)); | |
7828 | if (TREE_CODE (decl) != TYPE_DECL) | |
7829 | { | |
7830 | layout_decl (decl, 0); | |
7831 | if (c_dialect_objc ()) | |
7832 | objc_check_decl (decl); | |
0e6df31e | 7833 | rest_of_decl_compilation (decl, toplevel, 0); |
51e29401 RS |
7834 | } |
7835 | } | |
bf7a697f | 7836 | C_TYPE_INCOMPLETE_VARS (TYPE_MAIN_VARIANT (t)) = 0; |
51e29401 | 7837 | |
591a8495 JJ |
7838 | /* Update type location to the one of the definition, instead of e.g. |
7839 | a forward declaration. */ | |
7840 | if (TYPE_STUB_DECL (t)) | |
7841 | DECL_SOURCE_LOCATION (TYPE_STUB_DECL (t)) = loc; | |
7842 | ||
51e29401 RS |
7843 | /* Finish debugging output for this type. */ |
7844 | rest_of_type_compilation (t, toplevel); | |
7845 | ||
ca6af4f8 RH |
7846 | /* If we're inside a function proper, i.e. not file-scope and not still |
7847 | parsing parameters, then arrange for the size of a variable sized type | |
7848 | to be bound now. */ | |
38e01f9e | 7849 | if (building_stmt_list_p () && variably_modified_type_p (t, NULL_TREE)) |
c2255bc4 AH |
7850 | add_stmt (build_stmt (loc, |
7851 | DECL_EXPR, build_decl (loc, TYPE_DECL, NULL, t))); | |
ca6af4f8 | 7852 | |
dc491a25 ILT |
7853 | if (warn_cxx_compat) |
7854 | warn_cxx_compat_finish_struct (fieldlist); | |
24b97832 | 7855 | |
9771b263 DN |
7856 | struct_parse_info->struct_types.release (); |
7857 | struct_parse_info->fields.release (); | |
7858 | struct_parse_info->typedefs_seen.release (); | |
dc491a25 | 7859 | XDELETE (struct_parse_info); |
24b97832 | 7860 | |
dc491a25 | 7861 | struct_parse_info = enclosing_struct_parse_info; |
24b97832 ILT |
7862 | |
7863 | /* If this struct is defined inside a struct, add it to | |
dc491a25 ILT |
7864 | struct_types. */ |
7865 | if (warn_cxx_compat | |
7866 | && struct_parse_info != NULL | |
7867 | && !in_sizeof && !in_typeof && !in_alignof) | |
9771b263 | 7868 | struct_parse_info->struct_types.safe_push (t); |
24b97832 | 7869 | |
51e29401 RS |
7870 | return t; |
7871 | } | |
7872 | ||
7873 | /* Lay out the type T, and its element type, and so on. */ | |
7874 | ||
7875 | static void | |
35b1a6fa | 7876 | layout_array_type (tree t) |
51e29401 RS |
7877 | { |
7878 | if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE) | |
7879 | layout_array_type (TREE_TYPE (t)); | |
7880 | layout_type (t); | |
7881 | } | |
7882 | \f | |
7883 | /* Begin compiling the definition of an enumeration type. | |
7884 | NAME is its name (or null if anonymous). | |
c2255bc4 | 7885 | LOC is the enum's location. |
51e29401 RS |
7886 | Returns the type object, as yet incomplete. |
7887 | Also records info about it so that build_enumerator | |
7888 | may be used to declare the individual values as they are read. */ | |
7889 | ||
7890 | tree | |
c2255bc4 | 7891 | start_enum (location_t loc, struct c_enum_contents *the_enum, tree name) |
51e29401 | 7892 | { |
24b97832 ILT |
7893 | tree enumtype = NULL_TREE; |
7894 | location_t enumloc = UNKNOWN_LOCATION; | |
51e29401 RS |
7895 | |
7896 | /* If this is the real definition for a previous forward reference, | |
7897 | fill in the contents in the same object that used to be the | |
7898 | forward reference. */ | |
7899 | ||
24b97832 ILT |
7900 | if (name != NULL_TREE) |
7901 | enumtype = lookup_tag (ENUMERAL_TYPE, name, 1, &enumloc); | |
51e29401 RS |
7902 | |
7903 | if (enumtype == 0 || TREE_CODE (enumtype) != ENUMERAL_TYPE) | |
7904 | { | |
7905 | enumtype = make_node (ENUMERAL_TYPE); | |
c2255bc4 | 7906 | pushtag (loc, name, enumtype); |
51e29401 RS |
7907 | } |
7908 | ||
085e33aa | 7909 | if (C_TYPE_BEING_DEFINED (enumtype)) |
24b97832 | 7910 | error_at (loc, "nested redefinition of %<enum %E%>", name); |
085e33aa | 7911 | |
51e29401 RS |
7912 | C_TYPE_BEING_DEFINED (enumtype) = 1; |
7913 | ||
7914 | if (TYPE_VALUES (enumtype) != 0) | |
7915 | { | |
7916 | /* This enum is a named one that has been declared already. */ | |
24b97832 ILT |
7917 | error_at (loc, "redeclaration of %<enum %E%>", name); |
7918 | if (enumloc != UNKNOWN_LOCATION) | |
7919 | inform (enumloc, "originally defined here"); | |
51e29401 RS |
7920 | |
7921 | /* Completely replace its old definition. | |
7922 | The old enumerators remain defined, however. */ | |
7923 | TYPE_VALUES (enumtype) = 0; | |
7924 | } | |
7925 | ||
7114359f TT |
7926 | the_enum->enum_next_value = integer_zero_node; |
7927 | the_enum->enum_overflow = 0; | |
51e29401 | 7928 | |
02eb6e90 RK |
7929 | if (flag_short_enums) |
7930 | TYPE_PACKED (enumtype) = 1; | |
7931 | ||
24b97832 ILT |
7932 | /* FIXME: This will issue a warning for a use of a type defined |
7933 | within sizeof in a statement expr. This is not terribly serious | |
7934 | as C++ doesn't permit statement exprs within sizeof anyhow. */ | |
7935 | if (warn_cxx_compat && (in_sizeof || in_typeof || in_alignof)) | |
7936 | warning_at (loc, OPT_Wc___compat, | |
7937 | "defining type in %qs expression is invalid in C++", | |
7938 | (in_sizeof | |
7939 | ? "sizeof" | |
7940 | : (in_typeof ? "typeof" : "alignof"))); | |
7941 | ||
51e29401 RS |
7942 | return enumtype; |
7943 | } | |
7944 | ||
7945 | /* After processing and defining all the values of an enumeration type, | |
7946 | install their decls in the enumeration type and finish it off. | |
10861e9a RK |
7947 | ENUMTYPE is the type object, VALUES a list of decl-value pairs, |
7948 | and ATTRIBUTES are the specified attributes. | |
51e29401 RS |
7949 | Returns ENUMTYPE. */ |
7950 | ||
7951 | tree | |
35b1a6fa | 7952 | finish_enum (tree enumtype, tree values, tree attributes) |
51e29401 | 7953 | { |
b3694847 | 7954 | tree pair, tem; |
6de9cd9a | 7955 | tree minnode = 0, maxnode = 0; |
807e902e KZ |
7956 | int precision; |
7957 | signop sign; | |
f75fbaf7 | 7958 | bool toplevel = (file_scope == current_scope); |
6de9cd9a | 7959 | struct lang_type *lt; |
51e29401 | 7960 | |
91d231cb | 7961 | decl_attributes (&enumtype, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE); |
10861e9a | 7962 | |
51e29401 RS |
7963 | /* Calculate the maximum value of any enumerator in this type. */ |
7964 | ||
59116212 RK |
7965 | if (values == error_mark_node) |
7966 | minnode = maxnode = integer_zero_node; | |
7967 | else | |
f500253d | 7968 | { |
cb3ca04e ZW |
7969 | minnode = maxnode = TREE_VALUE (values); |
7970 | for (pair = TREE_CHAIN (values); pair; pair = TREE_CHAIN (pair)) | |
f500253d | 7971 | { |
cb3ca04e ZW |
7972 | tree value = TREE_VALUE (pair); |
7973 | if (tree_int_cst_lt (maxnode, value)) | |
7974 | maxnode = value; | |
7975 | if (tree_int_cst_lt (value, minnode)) | |
7976 | minnode = value; | |
f500253d | 7977 | } |
cb3ca04e | 7978 | } |
f500253d | 7979 | |
cb3ca04e ZW |
7980 | /* Construct the final type of this enumeration. It is the same |
7981 | as one of the integral types - the narrowest one that fits, except | |
7982 | that normally we only go as narrow as int - and signed iff any of | |
7983 | the values are negative. */ | |
807e902e KZ |
7984 | sign = (tree_int_cst_sgn (minnode) >= 0) ? UNSIGNED : SIGNED; |
7985 | precision = MAX (tree_int_cst_min_precision (minnode, sign), | |
7986 | tree_int_cst_min_precision (maxnode, sign)); | |
ec8465a5 | 7987 | |
1ada4cd0 | 7988 | if (TYPE_PACKED (enumtype) || precision > TYPE_PRECISION (integer_type_node)) |
cb3ca04e | 7989 | { |
807e902e | 7990 | tem = c_common_type_for_size (precision, sign == UNSIGNED ? 1 : 0); |
6de9cd9a | 7991 | if (tem == NULL) |
1ada4cd0 | 7992 | { |
d4ee4d25 | 7993 | warning (0, "enumeration values exceed range of largest integer"); |
6de9cd9a | 7994 | tem = long_long_integer_type_node; |
1ada4cd0 | 7995 | } |
f500253d | 7996 | } |
1ada4cd0 | 7997 | else |
807e902e | 7998 | tem = sign == UNSIGNED ? unsigned_type_node : integer_type_node; |
736f85c7 | 7999 | |
6de9cd9a DN |
8000 | TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (tem); |
8001 | TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (tem); | |
6de9cd9a | 8002 | TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (tem); |
51e29401 | 8003 | TYPE_SIZE (enumtype) = 0; |
ec8465a5 RK |
8004 | |
8005 | /* If the precision of the type was specific with an attribute and it | |
8006 | was too small, give an error. Otherwise, use it. */ | |
8007 | if (TYPE_PRECISION (enumtype)) | |
8008 | { | |
8009 | if (precision > TYPE_PRECISION (enumtype)) | |
8010 | error ("specified mode too small for enumeral values"); | |
8011 | } | |
8012 | else | |
8013 | TYPE_PRECISION (enumtype) = TYPE_PRECISION (tem); | |
8014 | ||
51e29401 RS |
8015 | layout_type (enumtype); |
8016 | ||
59116212 | 8017 | if (values != error_mark_node) |
75b46437 | 8018 | { |
cb3ca04e ZW |
8019 | /* Change the type of the enumerators to be the enum type. We |
8020 | need to do this irrespective of the size of the enum, for | |
8021 | proper type checking. Replace the DECL_INITIALs of the | |
8022 | enumerators, and the value slots of the list, with copies | |
8023 | that have the enum type; they cannot be modified in place | |
8024 | because they may be shared (e.g. integer_zero_node) Finally, | |
8025 | change the purpose slots to point to the names of the decls. */ | |
59116212 RK |
8026 | for (pair = values; pair; pair = TREE_CHAIN (pair)) |
8027 | { | |
cb3ca04e | 8028 | tree enu = TREE_PURPOSE (pair); |
6de9cd9a | 8029 | tree ini = DECL_INITIAL (enu); |
51e29401 | 8030 | |
cb3ca04e | 8031 | TREE_TYPE (enu) = enumtype; |
736f85c7 AO |
8032 | |
8033 | /* The ISO C Standard mandates enumerators to have type int, | |
8034 | even though the underlying type of an enum type is | |
85790e66 | 8035 | unspecified. However, GCC allows enumerators of any |
a7e72022 MLI |
8036 | integer type as an extensions. build_enumerator() |
8037 | converts any enumerators that fit in an int to type int, | |
8038 | to avoid promotions to unsigned types when comparing | |
8039 | integers with enumerators that fit in the int range. | |
8040 | When -pedantic is given, build_enumerator() would have | |
8041 | already warned about those that don't fit. Here we | |
8042 | convert the rest to the enumerator type. */ | |
8043 | if (TREE_TYPE (ini) != integer_type_node) | |
8044 | ini = convert (enumtype, ini); | |
cb3ca04e | 8045 | |
6de9cd9a | 8046 | DECL_INITIAL (enu) = ini; |
cb3ca04e | 8047 | TREE_PURPOSE (pair) = DECL_NAME (enu); |
6de9cd9a | 8048 | TREE_VALUE (pair) = ini; |
cb3ca04e | 8049 | } |
51e29401 | 8050 | |
59116212 RK |
8051 | TYPE_VALUES (enumtype) = values; |
8052 | } | |
51e29401 | 8053 | |
6de9cd9a DN |
8054 | /* Record the min/max values so that we can warn about bit-field |
8055 | enumerations that are too small for the values. */ | |
766090c2 | 8056 | lt = ggc_cleared_alloc<struct lang_type> (); |
6de9cd9a DN |
8057 | lt->enum_min = minnode; |
8058 | lt->enum_max = maxnode; | |
8059 | TYPE_LANG_SPECIFIC (enumtype) = lt; | |
8060 | ||
fbe23ee7 RS |
8061 | /* Fix up all variant types of this enum type. */ |
8062 | for (tem = TYPE_MAIN_VARIANT (enumtype); tem; tem = TYPE_NEXT_VARIANT (tem)) | |
8063 | { | |
cb3ca04e ZW |
8064 | if (tem == enumtype) |
8065 | continue; | |
fbe23ee7 RS |
8066 | TYPE_VALUES (tem) = TYPE_VALUES (enumtype); |
8067 | TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype); | |
8068 | TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype); | |
8069 | TYPE_SIZE (tem) = TYPE_SIZE (enumtype); | |
def9b006 | 8070 | TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype); |
179d2f74 | 8071 | SET_TYPE_MODE (tem, TYPE_MODE (enumtype)); |
fbe23ee7 RS |
8072 | TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype); |
8073 | TYPE_ALIGN (tem) = TYPE_ALIGN (enumtype); | |
11cf4d18 | 8074 | TYPE_USER_ALIGN (tem) = TYPE_USER_ALIGN (enumtype); |
8df83eae | 8075 | TYPE_UNSIGNED (tem) = TYPE_UNSIGNED (enumtype); |
6de9cd9a | 8076 | TYPE_LANG_SPECIFIC (tem) = TYPE_LANG_SPECIFIC (enumtype); |
fbe23ee7 RS |
8077 | } |
8078 | ||
51e29401 RS |
8079 | /* Finish debugging output for this type. */ |
8080 | rest_of_type_compilation (enumtype, toplevel); | |
8081 | ||
24b97832 | 8082 | /* If this enum is defined inside a struct, add it to |
dc491a25 ILT |
8083 | struct_types. */ |
8084 | if (warn_cxx_compat | |
8085 | && struct_parse_info != NULL | |
8086 | && !in_sizeof && !in_typeof && !in_alignof) | |
9771b263 | 8087 | struct_parse_info->struct_types.safe_push (enumtype); |
24b97832 | 8088 | |
51e29401 RS |
8089 | return enumtype; |
8090 | } | |
8091 | ||
8092 | /* Build and install a CONST_DECL for one value of the | |
8093 | current enumeration type (one that was begun with start_enum). | |
7370e0da AC |
8094 | DECL_LOC is the location of the enumerator. |
8095 | LOC is the location of the '=' operator if any, DECL_LOC otherwise. | |
51e29401 RS |
8096 | Return a tree-list containing the CONST_DECL and its value. |
8097 | Assignment of sequential values by default is handled here. */ | |
8098 | ||
8099 | tree | |
7370e0da | 8100 | build_enumerator (location_t decl_loc, location_t loc, |
c2255bc4 | 8101 | struct c_enum_contents *the_enum, tree name, tree value) |
51e29401 | 8102 | { |
b3694847 | 8103 | tree decl, type; |
51e29401 RS |
8104 | |
8105 | /* Validate and default VALUE. */ | |
8106 | ||
90374cc2 | 8107 | if (value != 0) |
e681c5a1 | 8108 | { |
f75fbaf7 ZW |
8109 | /* Don't issue more errors for error_mark_node (i.e. an |
8110 | undeclared identifier) - just ignore the value expression. */ | |
8111 | if (value == error_mark_node) | |
8112 | value = 0; | |
6895bac8 | 8113 | else if (!INTEGRAL_TYPE_P (TREE_TYPE (value))) |
25a1019f | 8114 | { |
c2255bc4 AH |
8115 | error_at (loc, "enumerator value for %qE is not an integer constant", |
8116 | name); | |
f75fbaf7 | 8117 | value = 0; |
25a1019f | 8118 | } |
e681c5a1 RS |
8119 | else |
8120 | { | |
6895bac8 JM |
8121 | if (TREE_CODE (value) != INTEGER_CST) |
8122 | { | |
8123 | value = c_fully_fold (value, false, NULL); | |
8124 | if (TREE_CODE (value) == INTEGER_CST) | |
c1771a20 | 8125 | pedwarn (loc, OPT_Wpedantic, |
6895bac8 JM |
8126 | "enumerator value for %qE is not an integer " |
8127 | "constant expression", name); | |
8128 | } | |
8129 | if (TREE_CODE (value) != INTEGER_CST) | |
8130 | { | |
8131 | error ("enumerator value for %qE is not an integer constant", | |
8132 | name); | |
8133 | value = 0; | |
8134 | } | |
8135 | else | |
8136 | { | |
8137 | value = default_conversion (value); | |
8138 | constant_expression_warning (value); | |
8139 | } | |
e681c5a1 RS |
8140 | } |
8141 | } | |
51e29401 RS |
8142 | |
8143 | /* Default based on previous value. */ | |
8144 | /* It should no longer be possible to have NON_LVALUE_EXPR | |
8145 | in the default. */ | |
8146 | if (value == 0) | |
93e3ba4f | 8147 | { |
7114359f TT |
8148 | value = the_enum->enum_next_value; |
8149 | if (the_enum->enum_overflow) | |
c2255bc4 | 8150 | error_at (loc, "overflow in enumeration values"); |
93e3ba4f | 8151 | } |
85790e66 MLI |
8152 | /* Even though the underlying type of an enum is unspecified, the |
8153 | type of enumeration constants is explicitly defined as int | |
8154 | (6.4.4.3/2 in the C99 Standard). GCC allows any integer type as | |
8155 | an extension. */ | |
8156 | else if (!int_fits_type_p (value, integer_type_node)) | |
c1771a20 | 8157 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 8158 | "ISO C restricts enumerator values to range of %<int%>"); |
51e29401 | 8159 | |
a7e72022 MLI |
8160 | /* The ISO C Standard mandates enumerators to have type int, even |
8161 | though the underlying type of an enum type is unspecified. | |
8162 | However, GCC allows enumerators of any integer type as an | |
8163 | extensions. Here we convert any enumerators that fit in an int | |
8164 | to type int, to avoid promotions to unsigned types when comparing | |
8165 | integers with enumerators that fit in the int range. When | |
8166 | -pedantic is given, we would have already warned about those that | |
8167 | don't fit. We have to do this here rather than in finish_enum | |
8168 | because this value may be used to define more enumerators. */ | |
8169 | if (int_fits_type_p (value, integer_type_node)) | |
8170 | value = convert (integer_type_node, value); | |
8171 | ||
51e29401 | 8172 | /* Set basis for default for next value. */ |
ba47d38d | 8173 | the_enum->enum_next_value |
8400e75e | 8174 | = build_binary_op (EXPR_LOC_OR_LOC (value, input_location), |
ec52b111 | 8175 | PLUS_EXPR, value, integer_one_node, 0); |
7114359f | 8176 | the_enum->enum_overflow = tree_int_cst_lt (the_enum->enum_next_value, value); |
51e29401 RS |
8177 | |
8178 | /* Now create a declaration for the enum value name. */ | |
8179 | ||
75b46437 | 8180 | type = TREE_TYPE (value); |
b0c48229 NB |
8181 | type = c_common_type_for_size (MAX (TYPE_PRECISION (type), |
8182 | TYPE_PRECISION (integer_type_node)), | |
8183 | (TYPE_PRECISION (type) | |
8184 | >= TYPE_PRECISION (integer_type_node) | |
8df83eae | 8185 | && TYPE_UNSIGNED (type))); |
75b46437 | 8186 | |
7370e0da | 8187 | decl = build_decl (decl_loc, CONST_DECL, name, type); |
0543d026 | 8188 | DECL_INITIAL (decl) = convert (type, value); |
51e29401 RS |
8189 | pushdecl (decl); |
8190 | ||
4dd7201e | 8191 | return tree_cons (decl, value, NULL_TREE); |
51e29401 | 8192 | } |
8f17b5c5 | 8193 | |
51e29401 RS |
8194 | \f |
8195 | /* Create the FUNCTION_DECL for a function definition. | |
f7a4cec0 | 8196 | DECLSPECS, DECLARATOR and ATTRIBUTES are the parts of |
5730cf69 | 8197 | the declaration; they describe the function's name and the type it returns, |
51e29401 RS |
8198 | but twisted together in a fashion that parallels the syntax of C. |
8199 | ||
8200 | This function creates a binding context for the function body | |
8201 | as well as setting up the FUNCTION_DECL in current_function_decl. | |
8202 | ||
8203 | Returns 1 on success. If the DECLARATOR is not suitable for a function | |
8204 | (it defines a datum instead), we return 0, which tells | |
4dd7201e | 8205 | yyparse to report a parse error. */ |
51e29401 RS |
8206 | |
8207 | int | |
deb176fa | 8208 | start_function (struct c_declspecs *declspecs, struct c_declarator *declarator, |
f8893e47 | 8209 | tree attributes) |
51e29401 RS |
8210 | { |
8211 | tree decl1, old_decl; | |
b785f485 | 8212 | tree restype, resdecl; |
c2255bc4 | 8213 | location_t loc; |
51e29401 | 8214 | |
0f41302f | 8215 | current_function_returns_value = 0; /* Assume, until we see it does. */ |
51e29401 | 8216 | current_function_returns_null = 0; |
5ce89b2e | 8217 | current_function_returns_abnormally = 0; |
51e29401 | 8218 | warn_about_return_type = 0; |
506e2710 RH |
8219 | c_switch_stack = NULL; |
8220 | ||
8221 | /* Indicate no valid break/continue context by setting these variables | |
8222 | to some non-null, non-label value. We'll notice and emit the proper | |
8223 | error message in c_finish_bc_stmt. */ | |
8224 | c_break_label = c_cont_label = size_zero_node; | |
51e29401 | 8225 | |
0da300cd | 8226 | decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, true, NULL, |
928c19bb | 8227 | &attributes, NULL, NULL, DEPRECATED_NORMAL); |
51e29401 RS |
8228 | |
8229 | /* If the declarator is not suitable for a function definition, | |
8230 | cause a syntax error. */ | |
560ad308 UB |
8231 | if (decl1 == 0 |
8232 | || TREE_CODE (decl1) != FUNCTION_DECL) | |
e1b7793c | 8233 | return 0; |
51e29401 | 8234 | |
c2255bc4 AH |
8235 | loc = DECL_SOURCE_LOCATION (decl1); |
8236 | ||
acf0174b | 8237 | c_decl_attributes (&decl1, attributes, 0); |
7665dfd4 | 8238 | |
9162542e AO |
8239 | if (DECL_DECLARED_INLINE_P (decl1) |
8240 | && DECL_UNINLINABLE (decl1) | |
8241 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl1))) | |
c2255bc4 AH |
8242 | warning_at (loc, OPT_Wattributes, |
8243 | "inline function %qD given attribute noinline", | |
8244 | decl1); | |
9162542e | 8245 | |
4eb7fd83 JJ |
8246 | /* Handle gnu_inline attribute. */ |
8247 | if (declspecs->inline_p | |
da1c7394 | 8248 | && !flag_gnu89_inline |
4eb7fd83 | 8249 | && TREE_CODE (decl1) == FUNCTION_DECL |
6cf59865 JJ |
8250 | && (lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (decl1)) |
8251 | || current_function_decl)) | |
4eb7fd83 JJ |
8252 | { |
8253 | if (declspecs->storage_class != csc_static) | |
8254 | DECL_EXTERNAL (decl1) = !DECL_EXTERNAL (decl1); | |
8255 | } | |
4eb7fd83 | 8256 | |
51e29401 RS |
8257 | announce_function (decl1); |
8258 | ||
d0f062fb | 8259 | if (!COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (TREE_TYPE (decl1)))) |
51e29401 | 8260 | { |
c2255bc4 | 8261 | error_at (loc, "return type is an incomplete type"); |
51e29401 RS |
8262 | /* Make it return void instead. */ |
8263 | TREE_TYPE (decl1) | |
8264 | = build_function_type (void_type_node, | |
8265 | TYPE_ARG_TYPES (TREE_TYPE (decl1))); | |
8266 | } | |
8267 | ||
8268 | if (warn_about_return_type) | |
92574c7c | 8269 | warn_defaults_to (loc, flag_isoc99 ? OPT_Wimplicit_int |
35aff4fb MP |
8270 | : (warn_return_type ? OPT_Wreturn_type |
8271 | : OPT_Wimplicit_int), | |
8272 | "return type defaults to %<int%>"); | |
51e29401 | 8273 | |
51e29401 | 8274 | /* Make the init_value nonzero so pushdecl knows this is not tentative. |
f75fbaf7 | 8275 | error_mark_node is replaced below (in pop_scope) with the BLOCK. */ |
51e29401 RS |
8276 | DECL_INITIAL (decl1) = error_mark_node; |
8277 | ||
c4712597 SZ |
8278 | /* A nested function is not global. */ |
8279 | if (current_function_decl != 0) | |
8280 | TREE_PUBLIC (decl1) = 0; | |
8281 | ||
51e29401 | 8282 | /* If this definition isn't a prototype and we had a prototype declaration |
46097c76 | 8283 | before, copy the arg type info from that prototype. */ |
f75fbaf7 | 8284 | old_decl = lookup_name_in_scope (DECL_NAME (decl1), current_scope); |
d8890adf JM |
8285 | if (old_decl && TREE_CODE (old_decl) != FUNCTION_DECL) |
8286 | old_decl = 0; | |
6fb58bba JM |
8287 | current_function_prototype_locus = UNKNOWN_LOCATION; |
8288 | current_function_prototype_built_in = false; | |
8289 | current_function_prototype_arg_types = NULL_TREE; | |
f4da8dce | 8290 | if (!prototype_p (TREE_TYPE (decl1))) |
6fb58bba JM |
8291 | { |
8292 | if (old_decl != 0 && TREE_CODE (TREE_TYPE (old_decl)) == FUNCTION_TYPE | |
8293 | && comptypes (TREE_TYPE (TREE_TYPE (decl1)), | |
8294 | TREE_TYPE (TREE_TYPE (old_decl)))) | |
8295 | { | |
8296 | TREE_TYPE (decl1) = composite_type (TREE_TYPE (old_decl), | |
8297 | TREE_TYPE (decl1)); | |
8298 | current_function_prototype_locus = DECL_SOURCE_LOCATION (old_decl); | |
8299 | current_function_prototype_built_in | |
8300 | = C_DECL_BUILTIN_PROTOTYPE (old_decl); | |
8301 | current_function_prototype_arg_types | |
8302 | = TYPE_ARG_TYPES (TREE_TYPE (decl1)); | |
8303 | } | |
8304 | if (TREE_PUBLIC (decl1)) | |
8305 | { | |
8306 | /* If there is an external prototype declaration of this | |
8307 | function, record its location but do not copy information | |
8308 | to this decl. This may be an invisible declaration | |
8309 | (built-in or in a scope which has finished) or simply | |
8310 | have more refined argument types than any declaration | |
8311 | found above. */ | |
8312 | struct c_binding *b; | |
8313 | for (b = I_SYMBOL_BINDING (DECL_NAME (decl1)); b; b = b->shadowed) | |
8314 | if (B_IN_SCOPE (b, external_scope)) | |
8315 | break; | |
8316 | if (b) | |
8317 | { | |
8318 | tree ext_decl, ext_type; | |
8319 | ext_decl = b->decl; | |
e1b7793c | 8320 | ext_type = b->u.type ? b->u.type : TREE_TYPE (ext_decl); |
6fb58bba JM |
8321 | if (TREE_CODE (ext_type) == FUNCTION_TYPE |
8322 | && comptypes (TREE_TYPE (TREE_TYPE (decl1)), | |
8323 | TREE_TYPE (ext_type))) | |
8324 | { | |
8325 | current_function_prototype_locus | |
8326 | = DECL_SOURCE_LOCATION (ext_decl); | |
8327 | current_function_prototype_built_in | |
8328 | = C_DECL_BUILTIN_PROTOTYPE (ext_decl); | |
8329 | current_function_prototype_arg_types | |
8330 | = TYPE_ARG_TYPES (ext_type); | |
8331 | } | |
8332 | } | |
8333 | } | |
50a9145c | 8334 | } |
51e29401 RS |
8335 | |
8336 | /* Optionally warn of old-fashioned def with no previous prototype. */ | |
8337 | if (warn_strict_prototypes | |
1e55c0e2 | 8338 | && old_decl != error_mark_node |
f4da8dce | 8339 | && !prototype_p (TREE_TYPE (decl1)) |
339a28b9 | 8340 | && C_DECL_ISNT_PROTOTYPE (old_decl)) |
c2255bc4 AH |
8341 | warning_at (loc, OPT_Wstrict_prototypes, |
8342 | "function declaration isn%'t a prototype"); | |
51e29401 RS |
8343 | /* Optionally warn of any global def with no previous prototype. */ |
8344 | else if (warn_missing_prototypes | |
1e55c0e2 | 8345 | && old_decl != error_mark_node |
51e29401 | 8346 | && TREE_PUBLIC (decl1) |
3f75a254 | 8347 | && !MAIN_NAME_P (DECL_NAME (decl1)) |
edd28054 MP |
8348 | && C_DECL_ISNT_PROTOTYPE (old_decl) |
8349 | && !DECL_DECLARED_INLINE_P (decl1)) | |
c2255bc4 AH |
8350 | warning_at (loc, OPT_Wmissing_prototypes, |
8351 | "no previous prototype for %qD", decl1); | |
51e29401 RS |
8352 | /* Optionally warn of any def with no previous prototype |
8353 | if the function has already been used. */ | |
8354 | else if (warn_missing_prototypes | |
1e55c0e2 JM |
8355 | && old_decl != 0 |
8356 | && old_decl != error_mark_node | |
8357 | && TREE_USED (old_decl) | |
f4da8dce | 8358 | && !prototype_p (TREE_TYPE (old_decl))) |
c2255bc4 AH |
8359 | warning_at (loc, OPT_Wmissing_prototypes, |
8360 | "%qD was used with no prototype before its definition", decl1); | |
1474fe46 RK |
8361 | /* Optionally warn of any global def with no previous declaration. */ |
8362 | else if (warn_missing_declarations | |
8363 | && TREE_PUBLIC (decl1) | |
8364 | && old_decl == 0 | |
b286be94 MP |
8365 | && !MAIN_NAME_P (DECL_NAME (decl1)) |
8366 | && !DECL_DECLARED_INLINE_P (decl1)) | |
c2255bc4 AH |
8367 | warning_at (loc, OPT_Wmissing_declarations, |
8368 | "no previous declaration for %qD", | |
8369 | decl1); | |
1474fe46 RK |
8370 | /* Optionally warn of any def with no previous declaration |
8371 | if the function has already been used. */ | |
8372 | else if (warn_missing_declarations | |
1e55c0e2 JM |
8373 | && old_decl != 0 |
8374 | && old_decl != error_mark_node | |
8375 | && TREE_USED (old_decl) | |
339a28b9 | 8376 | && C_DECL_IMPLICIT (old_decl)) |
c2255bc4 AH |
8377 | warning_at (loc, OPT_Wmissing_declarations, |
8378 | "%qD was used with no declaration before its definition", decl1); | |
51e29401 | 8379 | |
51e29401 RS |
8380 | /* This function exists in static storage. |
8381 | (This does not mean `static' in the C sense!) */ | |
8382 | TREE_STATIC (decl1) = 1; | |
8383 | ||
d05cc98e GK |
8384 | /* This is the earliest point at which we might know the assembler |
8385 | name of the function. Thus, if it's set before this, die horribly. */ | |
366de0ce | 8386 | gcc_assert (!DECL_ASSEMBLER_NAME_SET_P (decl1)); |
d05cc98e GK |
8387 | |
8388 | /* If #pragma weak was used, mark the decl weak now. */ | |
f75fbaf7 | 8389 | if (current_scope == file_scope) |
d05cc98e GK |
8390 | maybe_apply_pragma_weak (decl1); |
8391 | ||
6645c3fa | 8392 | /* Warn for unlikely, improbable, or stupid declarations of `main'. */ |
4003301d | 8393 | if (warn_main && MAIN_NAME_P (DECL_NAME (decl1))) |
b8705e61 | 8394 | { |
b8705e61 | 8395 | if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (decl1))) |
6645c3fa | 8396 | != integer_type_node) |
c2255bc4 | 8397 | pedwarn (loc, OPT_Wmain, "return type of %qD is not %<int%>", decl1); |
f827930a MP |
8398 | else if (TYPE_ATOMIC (TREE_TYPE (TREE_TYPE (decl1)))) |
8399 | pedwarn (loc, OPT_Wmain, "%<_Atomic%>-qualified return type of %qD", | |
8400 | decl1); | |
b8705e61 | 8401 | |
4003301d | 8402 | check_main_parameter_types (decl1); |
b8705e61 | 8403 | |
3f75a254 | 8404 | if (!TREE_PUBLIC (decl1)) |
c2255bc4 AH |
8405 | pedwarn (loc, OPT_Wmain, |
8406 | "%qD is normally a non-static function", decl1); | |
b8705e61 RK |
8407 | } |
8408 | ||
51e29401 RS |
8409 | /* Record the decl so that the function name is defined. |
8410 | If we already have a decl for this name, and it is a FUNCTION_DECL, | |
8411 | use the old decl. */ | |
8412 | ||
8413 | current_function_decl = pushdecl (decl1); | |
8414 | ||
f75fbaf7 | 8415 | push_scope (); |
eb1dfbb2 | 8416 | declare_parm_level (); |
51e29401 | 8417 | |
51e29401 | 8418 | restype = TREE_TYPE (TREE_TYPE (current_function_decl)); |
c2255bc4 | 8419 | resdecl = build_decl (loc, RESULT_DECL, NULL_TREE, restype); |
b785f485 RH |
8420 | DECL_ARTIFICIAL (resdecl) = 1; |
8421 | DECL_IGNORED_P (resdecl) = 1; | |
8422 | DECL_RESULT (current_function_decl) = resdecl; | |
51e29401 | 8423 | |
0ba8a114 | 8424 | start_fname_decls (); |
35b1a6fa | 8425 | |
51e29401 RS |
8426 | return 1; |
8427 | } | |
51e29401 | 8428 | \f |
66db6b62 ZW |
8429 | /* Subroutine of store_parm_decls which handles new-style function |
8430 | definitions (prototype format). The parms already have decls, so we | |
8431 | need only record them as in effect and complain if any redundant | |
8432 | old-style parm decls were written. */ | |
d4e43dff | 8433 | static void |
f8893e47 | 8434 | store_parm_decls_newstyle (tree fndecl, const struct c_arg_info *arg_info) |
51e29401 | 8435 | { |
f75fbaf7 | 8436 | tree decl; |
e60bf9d4 NF |
8437 | c_arg_tag *tag; |
8438 | unsigned ix; | |
51e29401 | 8439 | |
f75fbaf7 | 8440 | if (current_scope->bindings) |
66db6b62 | 8441 | { |
c5d75364 MLI |
8442 | error_at (DECL_SOURCE_LOCATION (fndecl), |
8443 | "old-style parameter declarations in prototyped " | |
8444 | "function definition"); | |
51e29401 | 8445 | |
66db6b62 | 8446 | /* Get rid of the old-style declarations. */ |
f75fbaf7 ZW |
8447 | pop_scope (); |
8448 | push_scope (); | |
8449 | } | |
8450 | /* Don't issue this warning for nested functions, and don't issue this | |
8451 | warning if we got here because ARG_INFO_TYPES was error_mark_node | |
8452 | (this happens when a function definition has just an ellipsis in | |
8453 | its parameter list). */ | |
8400e75e DM |
8454 | else if (!in_system_header_at (input_location) |
8455 | && !current_function_scope | |
f8893e47 | 8456 | && arg_info->types != error_mark_node) |
c5d75364 MLI |
8457 | warning_at (DECL_SOURCE_LOCATION (fndecl), OPT_Wtraditional, |
8458 | "traditional C rejects ISO C style function definitions"); | |
51e29401 | 8459 | |
55d54003 ZW |
8460 | /* Now make all the parameter declarations visible in the function body. |
8461 | We can bypass most of the grunt work of pushdecl. */ | |
910ad8de | 8462 | for (decl = arg_info->parms; decl; decl = DECL_CHAIN (decl)) |
66db6b62 | 8463 | { |
55d54003 | 8464 | DECL_CONTEXT (decl) = current_function_decl; |
f75fbaf7 | 8465 | if (DECL_NAME (decl)) |
7c47d6e9 JM |
8466 | { |
8467 | bind (DECL_NAME (decl), decl, current_scope, | |
b3f27c15 JJ |
8468 | /*invisible=*/false, /*nested=*/false, |
8469 | UNKNOWN_LOCATION); | |
7c47d6e9 JM |
8470 | if (!TREE_USED (decl)) |
8471 | warn_if_shadowing (decl); | |
8472 | } | |
66db6b62 | 8473 | else |
c5d75364 | 8474 | error_at (DECL_SOURCE_LOCATION (decl), "parameter name omitted"); |
66db6b62 | 8475 | } |
26f943fd | 8476 | |
66db6b62 | 8477 | /* Record the parameter list in the function declaration. */ |
f8893e47 | 8478 | DECL_ARGUMENTS (fndecl) = arg_info->parms; |
51e29401 | 8479 | |
66db6b62 | 8480 | /* Now make all the ancillary declarations visible, likewise. */ |
910ad8de | 8481 | for (decl = arg_info->others; decl; decl = DECL_CHAIN (decl)) |
55d54003 ZW |
8482 | { |
8483 | DECL_CONTEXT (decl) = current_function_decl; | |
f75fbaf7 | 8484 | if (DECL_NAME (decl)) |
9aaabf8a | 8485 | bind (DECL_NAME (decl), decl, current_scope, |
10e76c1a JM |
8486 | /*invisible=*/false, |
8487 | /*nested=*/(TREE_CODE (decl) == FUNCTION_DECL), | |
8488 | UNKNOWN_LOCATION); | |
55d54003 | 8489 | } |
26f943fd | 8490 | |
66db6b62 | 8491 | /* And all the tag declarations. */ |
9771b263 | 8492 | FOR_EACH_VEC_SAFE_ELT_REVERSE (arg_info->tags, ix, tag) |
e60bf9d4 NF |
8493 | if (tag->id) |
8494 | bind (tag->id, tag->type, current_scope, | |
b3f27c15 | 8495 | /*invisible=*/false, /*nested=*/false, UNKNOWN_LOCATION); |
66db6b62 | 8496 | } |
1f731749 | 8497 | |
66db6b62 ZW |
8498 | /* Subroutine of store_parm_decls which handles old-style function |
8499 | definitions (separate parameter list and declarations). */ | |
51e29401 | 8500 | |
66db6b62 | 8501 | static void |
f8893e47 | 8502 | store_parm_decls_oldstyle (tree fndecl, const struct c_arg_info *arg_info) |
66db6b62 | 8503 | { |
f75fbaf7 | 8504 | struct c_binding *b; |
55d54003 | 8505 | tree parm, decl, last; |
f8893e47 | 8506 | tree parmids = arg_info->parms; |
6e2830c3 | 8507 | hash_set<tree> seen_args; |
66db6b62 | 8508 | |
8400e75e | 8509 | if (!in_system_header_at (input_location)) |
c2255bc4 AH |
8510 | warning_at (DECL_SOURCE_LOCATION (fndecl), |
8511 | OPT_Wold_style_definition, "old-style function definition"); | |
f75fbaf7 | 8512 | |
66db6b62 ZW |
8513 | /* Match each formal parameter name with its declaration. Save each |
8514 | decl in the appropriate TREE_PURPOSE slot of the parmids chain. */ | |
8515 | for (parm = parmids; parm; parm = TREE_CHAIN (parm)) | |
8516 | { | |
8517 | if (TREE_VALUE (parm) == 0) | |
7a0347ff | 8518 | { |
c2255bc4 AH |
8519 | error_at (DECL_SOURCE_LOCATION (fndecl), |
8520 | "parameter name missing from parameter list"); | |
66db6b62 ZW |
8521 | TREE_PURPOSE (parm) = 0; |
8522 | continue; | |
7a0347ff | 8523 | } |
51e29401 | 8524 | |
f75fbaf7 | 8525 | b = I_SYMBOL_BINDING (TREE_VALUE (parm)); |
9aaabf8a | 8526 | if (b && B_IN_CURRENT_SCOPE (b)) |
51e29401 | 8527 | { |
f75fbaf7 | 8528 | decl = b->decl; |
c58e98c8 SM |
8529 | /* Skip erroneous parameters. */ |
8530 | if (decl == error_mark_node) | |
8531 | continue; | |
66db6b62 ZW |
8532 | /* If we got something other than a PARM_DECL it is an error. */ |
8533 | if (TREE_CODE (decl) != PARM_DECL) | |
c2255bc4 AH |
8534 | error_at (DECL_SOURCE_LOCATION (decl), |
8535 | "%qD declared as a non-parameter", decl); | |
66db6b62 ZW |
8536 | /* If the declaration is already marked, we have a duplicate |
8537 | name. Complain and ignore the duplicate. */ | |
6e2830c3 | 8538 | else if (seen_args.contains (decl)) |
51e29401 | 8539 | { |
c2255bc4 AH |
8540 | error_at (DECL_SOURCE_LOCATION (decl), |
8541 | "multiple parameters named %qD", decl); | |
66db6b62 ZW |
8542 | TREE_PURPOSE (parm) = 0; |
8543 | continue; | |
51e29401 | 8544 | } |
66db6b62 ZW |
8545 | /* If the declaration says "void", complain and turn it into |
8546 | an int. */ | |
8547 | else if (VOID_TYPE_P (TREE_TYPE (decl))) | |
51e29401 | 8548 | { |
c2255bc4 AH |
8549 | error_at (DECL_SOURCE_LOCATION (decl), |
8550 | "parameter %qD declared with void type", decl); | |
66db6b62 ZW |
8551 | TREE_TYPE (decl) = integer_type_node; |
8552 | DECL_ARG_TYPE (decl) = integer_type_node; | |
8553 | layout_decl (decl, 0); | |
51e29401 | 8554 | } |
7c47d6e9 | 8555 | warn_if_shadowing (decl); |
51e29401 | 8556 | } |
66db6b62 ZW |
8557 | /* If no declaration found, default to int. */ |
8558 | else | |
51e29401 | 8559 | { |
c2255bc4 AH |
8560 | /* FIXME diagnostics: This should be the location of the argument, |
8561 | not the FNDECL. E.g., for an old-style declaration | |
8562 | ||
8563 | int f10(v) { blah; } | |
8564 | ||
8565 | We should use the location of the V, not the F10. | |
8566 | Unfortunately, the V is an IDENTIFIER_NODE which has no | |
8567 | location. In the future we need locations for c_arg_info | |
8568 | entries. | |
8569 | ||
8570 | See gcc.dg/Wshadow-3.c for an example of this problem. */ | |
8571 | decl = build_decl (DECL_SOURCE_LOCATION (fndecl), | |
8572 | PARM_DECL, TREE_VALUE (parm), integer_type_node); | |
66db6b62 | 8573 | DECL_ARG_TYPE (decl) = TREE_TYPE (decl); |
66db6b62 | 8574 | pushdecl (decl); |
7c47d6e9 | 8575 | warn_if_shadowing (decl); |
66db6b62 ZW |
8576 | |
8577 | if (flag_isoc99) | |
c2255bc4 | 8578 | pedwarn (DECL_SOURCE_LOCATION (decl), |
92574c7c MP |
8579 | OPT_Wimplicit_int, "type of %qD defaults to %<int%>", |
8580 | decl); | |
b8698a0f | 8581 | else |
c2255bc4 AH |
8582 | warning_at (DECL_SOURCE_LOCATION (decl), |
8583 | OPT_Wmissing_parameter_type, | |
8584 | "type of %qD defaults to %<int%>", decl); | |
51e29401 RS |
8585 | } |
8586 | ||
66db6b62 | 8587 | TREE_PURPOSE (parm) = decl; |
6e2830c3 | 8588 | seen_args.add (decl); |
51e29401 | 8589 | } |
51e29401 | 8590 | |
55d54003 ZW |
8591 | /* Now examine the parms chain for incomplete declarations |
8592 | and declarations with no corresponding names. */ | |
51e29401 | 8593 | |
f75fbaf7 | 8594 | for (b = current_scope->bindings; b; b = b->prev) |
66db6b62 | 8595 | { |
f75fbaf7 ZW |
8596 | parm = b->decl; |
8597 | if (TREE_CODE (parm) != PARM_DECL) | |
8598 | continue; | |
8599 | ||
559f2da5 RH |
8600 | if (TREE_TYPE (parm) != error_mark_node |
8601 | && !COMPLETE_TYPE_P (TREE_TYPE (parm))) | |
51e29401 | 8602 | { |
c2255bc4 AH |
8603 | error_at (DECL_SOURCE_LOCATION (parm), |
8604 | "parameter %qD has incomplete type", parm); | |
66db6b62 ZW |
8605 | TREE_TYPE (parm) = error_mark_node; |
8606 | } | |
51e29401 | 8607 | |
6e2830c3 | 8608 | if (!seen_args.contains (parm)) |
66db6b62 | 8609 | { |
c2255bc4 AH |
8610 | error_at (DECL_SOURCE_LOCATION (parm), |
8611 | "declaration for parameter %qD but no such parameter", | |
8612 | parm); | |
51e29401 | 8613 | |
66db6b62 ZW |
8614 | /* Pretend the parameter was not missing. |
8615 | This gets us to a standard state and minimizes | |
8616 | further error messages. */ | |
8617 | parmids = chainon (parmids, tree_cons (parm, 0, 0)); | |
51e29401 | 8618 | } |
66db6b62 | 8619 | } |
51e29401 | 8620 | |
66db6b62 ZW |
8621 | /* Chain the declarations together in the order of the list of |
8622 | names. Store that chain in the function decl, replacing the | |
55d54003 | 8623 | list of names. Update the current scope to match. */ |
66db6b62 | 8624 | DECL_ARGUMENTS (fndecl) = 0; |
66db6b62 | 8625 | |
55d54003 ZW |
8626 | for (parm = parmids; parm; parm = TREE_CHAIN (parm)) |
8627 | if (TREE_PURPOSE (parm)) | |
8628 | break; | |
8629 | if (parm && TREE_PURPOSE (parm)) | |
8630 | { | |
8631 | last = TREE_PURPOSE (parm); | |
8632 | DECL_ARGUMENTS (fndecl) = last; | |
55d54003 ZW |
8633 | |
8634 | for (parm = TREE_CHAIN (parm); parm; parm = TREE_CHAIN (parm)) | |
8635 | if (TREE_PURPOSE (parm)) | |
8636 | { | |
910ad8de | 8637 | DECL_CHAIN (last) = TREE_PURPOSE (parm); |
55d54003 | 8638 | last = TREE_PURPOSE (parm); |
55d54003 | 8639 | } |
910ad8de | 8640 | DECL_CHAIN (last) = 0; |
55d54003 | 8641 | } |
51e29401 | 8642 | |
66db6b62 ZW |
8643 | /* If there was a previous prototype, |
8644 | set the DECL_ARG_TYPE of each argument according to | |
8645 | the type previously specified, and report any mismatches. */ | |
51e29401 | 8646 | |
6fb58bba | 8647 | if (current_function_prototype_arg_types) |
66db6b62 ZW |
8648 | { |
8649 | tree type; | |
8650 | for (parm = DECL_ARGUMENTS (fndecl), | |
6fb58bba | 8651 | type = current_function_prototype_arg_types; |
f1f66b42 LM |
8652 | parm || (type && TREE_VALUE (type) != error_mark_node |
8653 | && (TYPE_MAIN_VARIANT (TREE_VALUE (type)) != void_type_node)); | |
910ad8de | 8654 | parm = DECL_CHAIN (parm), type = TREE_CHAIN (type)) |
51e29401 | 8655 | { |
66db6b62 ZW |
8656 | if (parm == 0 || type == 0 |
8657 | || TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node) | |
51e29401 | 8658 | { |
6fb58bba | 8659 | if (current_function_prototype_built_in) |
c2255bc4 AH |
8660 | warning_at (DECL_SOURCE_LOCATION (fndecl), |
8661 | 0, "number of arguments doesn%'t match " | |
8662 | "built-in prototype"); | |
6fb58bba JM |
8663 | else |
8664 | { | |
c2255bc4 AH |
8665 | /* FIXME diagnostics: This should be the location of |
8666 | FNDECL, but there is bug when a prototype is | |
8667 | declared inside function context, but defined | |
8668 | outside of it (e.g., gcc.dg/pr15698-2.c). In | |
8669 | which case FNDECL gets the location of the | |
8670 | prototype, not the definition. */ | |
8671 | error_at (input_location, | |
8672 | "number of arguments doesn%'t match prototype"); | |
8673 | ||
8674 | error_at (current_function_prototype_locus, | |
8675 | "prototype declaration"); | |
6fb58bba | 8676 | } |
66db6b62 ZW |
8677 | break; |
8678 | } | |
8679 | /* Type for passing arg must be consistent with that | |
8680 | declared for the arg. ISO C says we take the unqualified | |
8681 | type for parameters declared with qualified type. */ | |
bb686a19 VR |
8682 | if (TREE_TYPE (parm) != error_mark_node |
8683 | && TREE_TYPE (type) != error_mark_node | |
267bac10 JM |
8684 | && ((TYPE_ATOMIC (DECL_ARG_TYPE (parm)) |
8685 | != TYPE_ATOMIC (TREE_VALUE (type))) | |
8686 | || !comptypes (TYPE_MAIN_VARIANT (DECL_ARG_TYPE (parm)), | |
8687 | TYPE_MAIN_VARIANT (TREE_VALUE (type))))) | |
66db6b62 | 8688 | { |
267bac10 JM |
8689 | if ((TYPE_ATOMIC (DECL_ARG_TYPE (parm)) |
8690 | == TYPE_ATOMIC (TREE_VALUE (type))) | |
8691 | && (TYPE_MAIN_VARIANT (TREE_TYPE (parm)) | |
8692 | == TYPE_MAIN_VARIANT (TREE_VALUE (type)))) | |
51e29401 | 8693 | { |
66db6b62 ZW |
8694 | /* Adjust argument to match prototype. E.g. a previous |
8695 | `int foo(float);' prototype causes | |
8696 | `int foo(x) float x; {...}' to be treated like | |
8697 | `int foo(float x) {...}'. This is particularly | |
8698 | useful for argument types like uid_t. */ | |
8699 | DECL_ARG_TYPE (parm) = TREE_TYPE (parm); | |
8700 | ||
61f71b34 | 8701 | if (targetm.calls.promote_prototypes (TREE_TYPE (current_function_decl)) |
66db6b62 ZW |
8702 | && INTEGRAL_TYPE_P (TREE_TYPE (parm)) |
8703 | && TYPE_PRECISION (TREE_TYPE (parm)) | |
8704 | < TYPE_PRECISION (integer_type_node)) | |
267bac10 JM |
8705 | DECL_ARG_TYPE (parm) |
8706 | = c_type_promotes_to (TREE_TYPE (parm)); | |
66db6b62 | 8707 | |
fcf73884 MLI |
8708 | /* ??? Is it possible to get here with a |
8709 | built-in prototype or will it always have | |
8710 | been diagnosed as conflicting with an | |
8711 | old-style definition and discarded? */ | |
8712 | if (current_function_prototype_built_in) | |
c2255bc4 | 8713 | warning_at (DECL_SOURCE_LOCATION (parm), |
c1771a20 | 8714 | OPT_Wpedantic, "promoted argument %qD " |
c2255bc4 | 8715 | "doesn%'t match built-in prototype", parm); |
fcf73884 | 8716 | else |
50a9145c | 8717 | { |
c2255bc4 | 8718 | pedwarn (DECL_SOURCE_LOCATION (parm), |
c1771a20 | 8719 | OPT_Wpedantic, "promoted argument %qD " |
fcf73884 | 8720 | "doesn%'t match prototype", parm); |
c1771a20 | 8721 | pedwarn (current_function_prototype_locus, OPT_Wpedantic, |
509c9d60 | 8722 | "prototype declaration"); |
50a9145c | 8723 | } |
51e29401 | 8724 | } |
66db6b62 ZW |
8725 | else |
8726 | { | |
6fb58bba | 8727 | if (current_function_prototype_built_in) |
c2255bc4 AH |
8728 | warning_at (DECL_SOURCE_LOCATION (parm), |
8729 | 0, "argument %qD doesn%'t match " | |
8730 | "built-in prototype", parm); | |
6fb58bba JM |
8731 | else |
8732 | { | |
c2255bc4 AH |
8733 | error_at (DECL_SOURCE_LOCATION (parm), |
8734 | "argument %qD doesn%'t match prototype", parm); | |
8735 | error_at (current_function_prototype_locus, | |
8736 | "prototype declaration"); | |
6fb58bba | 8737 | } |
66db6b62 | 8738 | } |
51e29401 | 8739 | } |
51e29401 | 8740 | } |
66db6b62 ZW |
8741 | TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = 0; |
8742 | } | |
51e29401 | 8743 | |
66db6b62 | 8744 | /* Otherwise, create a prototype that would match. */ |
51e29401 | 8745 | |
66db6b62 ZW |
8746 | else |
8747 | { | |
8748 | tree actual = 0, last = 0, type; | |
51e29401 | 8749 | |
910ad8de | 8750 | for (parm = DECL_ARGUMENTS (fndecl); parm; parm = DECL_CHAIN (parm)) |
66db6b62 ZW |
8751 | { |
8752 | type = tree_cons (NULL_TREE, DECL_ARG_TYPE (parm), NULL_TREE); | |
51e29401 RS |
8753 | if (last) |
8754 | TREE_CHAIN (last) = type; | |
8755 | else | |
8756 | actual = type; | |
66db6b62 ZW |
8757 | last = type; |
8758 | } | |
8759 | type = tree_cons (NULL_TREE, void_type_node, NULL_TREE); | |
8760 | if (last) | |
8761 | TREE_CHAIN (last) = type; | |
8762 | else | |
8763 | actual = type; | |
51e29401 | 8764 | |
66db6b62 ZW |
8765 | /* We are going to assign a new value for the TYPE_ACTUAL_ARG_TYPES |
8766 | of the type of this function, but we need to avoid having this | |
8767 | affect the types of other similarly-typed functions, so we must | |
8768 | first force the generation of an identical (but separate) type | |
8769 | node for the relevant function type. The new node we create | |
8770 | will be a variant of the main variant of the original function | |
8771 | type. */ | |
c138f328 | 8772 | |
8dd16ecc | 8773 | TREE_TYPE (fndecl) = build_variant_type_copy (TREE_TYPE (fndecl)); |
c138f328 | 8774 | |
66db6b62 ZW |
8775 | TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = actual; |
8776 | } | |
66db6b62 ZW |
8777 | } |
8778 | ||
d4e43dff ZL |
8779 | /* Store parameter declarations passed in ARG_INFO into the current |
8780 | function declaration. */ | |
8781 | ||
8782 | void | |
f8893e47 | 8783 | store_parm_decls_from (struct c_arg_info *arg_info) |
d4e43dff ZL |
8784 | { |
8785 | current_function_arg_info = arg_info; | |
8786 | store_parm_decls (); | |
8787 | } | |
8788 | ||
66db6b62 ZW |
8789 | /* Store the parameter declarations into the current function declaration. |
8790 | This is called after parsing the parameter declarations, before | |
8791 | digesting the body of the function. | |
8792 | ||
8793 | For an old-style definition, construct a prototype out of the old-style | |
8794 | parameter declarations and inject it into the function's type. */ | |
8795 | ||
8796 | void | |
8797 | store_parm_decls (void) | |
8798 | { | |
8799 | tree fndecl = current_function_decl; | |
7b112487 | 8800 | bool proto; |
66db6b62 | 8801 | |
77dbdb57 | 8802 | /* The argument information block for FNDECL. */ |
f8893e47 | 8803 | struct c_arg_info *arg_info = current_function_arg_info; |
7b112487 | 8804 | current_function_arg_info = 0; |
77dbdb57 | 8805 | |
f75fbaf7 ZW |
8806 | /* True if this definition is written with a prototype. Note: |
8807 | despite C99 6.7.5.3p14, we can *not* treat an empty argument | |
8808 | list in a function definition as equivalent to (void) -- an | |
8809 | empty argument list specifies the function has no parameters, | |
8810 | but only (void) sets up a prototype for future calls. */ | |
f8893e47 | 8811 | proto = arg_info->types != 0; |
66db6b62 | 8812 | |
f75fbaf7 | 8813 | if (proto) |
77dbdb57 | 8814 | store_parm_decls_newstyle (fndecl, arg_info); |
66db6b62 | 8815 | else |
77dbdb57 | 8816 | store_parm_decls_oldstyle (fndecl, arg_info); |
51e29401 | 8817 | |
f75fbaf7 | 8818 | /* The next call to push_scope will be a function body. */ |
51e29401 | 8819 | |
a8ccdffe | 8820 | next_is_function_body = true; |
51e29401 | 8821 | |
51e29401 RS |
8822 | /* Write a record describing this function definition to the prototypes |
8823 | file (if requested). */ | |
8824 | ||
f75fbaf7 | 8825 | gen_aux_info_record (fndecl, 1, 0, proto); |
51e29401 RS |
8826 | |
8827 | /* Initialize the RTL code for the function. */ | |
182e0d71 | 8828 | allocate_struct_function (fndecl, false); |
51e29401 | 8829 | |
3797cb21 | 8830 | if (warn_unused_local_typedefs) |
766090c2 | 8831 | cfun->language = ggc_cleared_alloc<language_function> (); |
3797cb21 | 8832 | |
8f17b5c5 | 8833 | /* Begin the statement tree for this function. */ |
325c3691 | 8834 | DECL_SAVED_TREE (fndecl) = push_stmt_list (); |
51e29401 | 8835 | |
82c82743 | 8836 | /* ??? Insert the contents of the pending sizes list into the function |
4744afba RH |
8837 | to be evaluated. The only reason left to have this is |
8838 | void foo(int n, int array[n++]) | |
8839 | because we throw away the array type in favor of a pointer type, and | |
8840 | thus won't naturally see the SAVE_EXPR containing the increment. All | |
8841 | other pending sizes would be handled by gimplify_parameters. */ | |
a04a722b JM |
8842 | if (arg_info->pending_sizes) |
8843 | add_stmt (arg_info->pending_sizes); | |
51e29401 | 8844 | } |
acf0174b JJ |
8845 | |
8846 | /* Store PARM_DECLs in PARMS into scope temporarily. Used for | |
8847 | c_finish_omp_declare_simd for function prototypes. No diagnostics | |
8848 | should be done. */ | |
8849 | ||
8850 | void | |
8851 | temp_store_parm_decls (tree fndecl, tree parms) | |
8852 | { | |
8853 | push_scope (); | |
8854 | for (tree p = parms; p; p = DECL_CHAIN (p)) | |
8855 | { | |
8856 | DECL_CONTEXT (p) = fndecl; | |
8857 | if (DECL_NAME (p)) | |
8858 | bind (DECL_NAME (p), p, current_scope, | |
8859 | /*invisible=*/false, /*nested=*/false, | |
8860 | UNKNOWN_LOCATION); | |
8861 | } | |
8862 | } | |
8863 | ||
8864 | /* Undo what temp_store_parm_decls did. */ | |
8865 | ||
8866 | void | |
8867 | temp_pop_parm_decls (void) | |
8868 | { | |
8869 | /* Clear all bindings in this temporary scope, so that | |
8870 | pop_scope doesn't create a BLOCK. */ | |
8871 | struct c_binding *b = current_scope->bindings; | |
8872 | current_scope->bindings = NULL; | |
8873 | for (; b; b = free_binding_and_advance (b)) | |
8874 | { | |
8875 | gcc_assert (TREE_CODE (b->decl) == PARM_DECL); | |
8876 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); | |
8877 | I_SYMBOL_BINDING (b->id) = b->shadowed; | |
8878 | if (b->shadowed && b->shadowed->u.type) | |
8879 | TREE_TYPE (b->shadowed->decl) = b->shadowed->u.type; | |
8880 | } | |
8881 | pop_scope (); | |
8882 | } | |
51e29401 | 8883 | \f |
6de9cd9a | 8884 | |
51e29401 | 8885 | /* Finish up a function declaration and compile that function |
cc343f65 | 8886 | all the way to assembler language output. Then free the storage |
51e29401 RS |
8887 | for the function definition. |
8888 | ||
4a46cbfb | 8889 | This is called after parsing the body of the function definition. */ |
51e29401 RS |
8890 | |
8891 | void | |
edaf3e03 | 8892 | finish_function (void) |
51e29401 | 8893 | { |
b3694847 | 8894 | tree fndecl = current_function_decl; |
6c39e757 NP |
8895 | |
8896 | if (c_dialect_objc ()) | |
8897 | objc_finish_function (); | |
51e29401 | 8898 | |
61f71b34 DD |
8899 | if (TREE_CODE (fndecl) == FUNCTION_DECL |
8900 | && targetm.calls.promote_prototypes (TREE_TYPE (fndecl))) | |
8901 | { | |
8902 | tree args = DECL_ARGUMENTS (fndecl); | |
910ad8de | 8903 | for (; args; args = DECL_CHAIN (args)) |
c22cacf3 MS |
8904 | { |
8905 | tree type = TREE_TYPE (args); | |
8906 | if (INTEGRAL_TYPE_P (type) | |
8907 | && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) | |
267bac10 | 8908 | DECL_ARG_TYPE (args) = c_type_promotes_to (type); |
c22cacf3 | 8909 | } |
61f71b34 DD |
8910 | } |
8911 | ||
67b28863 | 8912 | if (DECL_INITIAL (fndecl) && DECL_INITIAL (fndecl) != error_mark_node) |
af3fbed1 | 8913 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; |
51e29401 RS |
8914 | |
8915 | /* Must mark the RESULT_DECL as being in this function. */ | |
8916 | ||
67b28863 | 8917 | if (DECL_RESULT (fndecl) && DECL_RESULT (fndecl) != error_mark_node) |
af3fbed1 | 8918 | DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl; |
51e29401 | 8919 | |
4003301d MLI |
8920 | if (MAIN_NAME_P (DECL_NAME (fndecl)) && flag_hosted |
8921 | && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (fndecl))) | |
8922 | == integer_type_node && flag_isoc99) | |
8923 | { | |
4003301d MLI |
8924 | /* Hack. We don't want the middle-end to warn that this return |
8925 | is unreachable, so we mark its location as special. Using | |
8926 | UNKNOWN_LOCATION has the problem that it gets clobbered in | |
8927 | annotate_one_with_locus. A cleaner solution might be to | |
8928 | ensure ! should_carry_locus_p (stmt), but that needs a flag. | |
8929 | */ | |
c2255bc4 | 8930 | c_finish_return (BUILTINS_LOCATION, integer_zero_node, NULL_TREE); |
51e29401 | 8931 | } |
35b1a6fa | 8932 | |
8f17b5c5 | 8933 | /* Tie off the statement tree for this function. */ |
325c3691 RH |
8934 | DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl)); |
8935 | ||
939b37da BI |
8936 | /* If the function has _Cilk_spawn in front of a function call inside it |
8937 | i.e. it is a spawning function, then add the appropriate Cilk plus | |
8938 | functions inside. */ | |
8939 | if (fn_contains_cilk_spawn_p (cfun)) | |
8940 | cfun->cilk_frame_decl = insert_cilk_frame (fndecl); | |
8941 | ||
325c3691 | 8942 | finish_fname_decls (); |
5ce89b2e JM |
8943 | |
8944 | /* Complain if there's just no return statement. */ | |
46cfb101 JM |
8945 | if (warn_return_type |
8946 | && TREE_CODE (TREE_TYPE (TREE_TYPE (fndecl))) != VOID_TYPE | |
5ce89b2e | 8947 | && !current_function_returns_value && !current_function_returns_null |
41806d92 | 8948 | /* Don't complain if we are no-return. */ |
5ce89b2e | 8949 | && !current_function_returns_abnormally |
ef5d1181 JJ |
8950 | /* Don't complain if we are declared noreturn. */ |
8951 | && !TREE_THIS_VOLATILE (fndecl) | |
5ce89b2e JM |
8952 | /* Don't warn for main(). */ |
8953 | && !MAIN_NAME_P (DECL_NAME (fndecl)) | |
8954 | /* Or if they didn't actually specify a return type. */ | |
8955 | && !C_FUNCTION_IMPLICIT_INT (fndecl) | |
7e8b322a JH |
8956 | /* Normally, with -Wreturn-type, flow will complain, but we might |
8957 | optimize out static functions. */ | |
8958 | && !TREE_PUBLIC (fndecl)) | |
9da58884 | 8959 | { |
3176a0c2 DD |
8960 | warning (OPT_Wreturn_type, |
8961 | "no return statement in function returning non-void"); | |
9da58884 JH |
8962 | TREE_NO_WARNING (fndecl) = 1; |
8963 | } | |
5ce89b2e | 8964 | |
ebfbbdc5 JJ |
8965 | /* Complain about parameters that are only set, but never otherwise used. */ |
8966 | if (warn_unused_but_set_parameter) | |
8967 | { | |
8968 | tree decl; | |
8969 | ||
8970 | for (decl = DECL_ARGUMENTS (fndecl); | |
8971 | decl; | |
910ad8de | 8972 | decl = DECL_CHAIN (decl)) |
ebfbbdc5 JJ |
8973 | if (TREE_USED (decl) |
8974 | && TREE_CODE (decl) == PARM_DECL | |
8975 | && !DECL_READ_P (decl) | |
8976 | && DECL_NAME (decl) | |
8977 | && !DECL_ARTIFICIAL (decl) | |
8978 | && !TREE_NO_WARNING (decl)) | |
8979 | warning_at (DECL_SOURCE_LOCATION (decl), | |
8980 | OPT_Wunused_but_set_parameter, | |
8981 | "parameter %qD set but not used", decl); | |
8982 | } | |
8983 | ||
3797cb21 DS |
8984 | /* Complain about locally defined typedefs that are not used in this |
8985 | function. */ | |
8986 | maybe_warn_unused_local_typedefs (); | |
8987 | ||
6de9cd9a DN |
8988 | /* Store the end of the function, so that we get good line number |
8989 | info for the epilogue. */ | |
8990 | cfun->function_end_locus = input_location; | |
8991 | ||
b2ca3702 MM |
8992 | /* Finalize the ELF visibility for the function. */ |
8993 | c_determine_visibility (fndecl); | |
8994 | ||
c536a6a7 | 8995 | /* For GNU C extern inline functions disregard inline limits. */ |
b8698a0f | 8996 | if (DECL_EXTERNAL (fndecl) |
c536a6a7 RG |
8997 | && DECL_DECLARED_INLINE_P (fndecl)) |
8998 | DECL_DISREGARD_INLINE_LIMITS (fndecl) = 1; | |
8999 | ||
6de9cd9a DN |
9000 | /* Genericize before inlining. Delay genericizing nested functions |
9001 | until their parent function is genericized. Since finalizing | |
9002 | requires GENERIC, delay that as well. */ | |
118a3a8b | 9003 | |
73aea290 JM |
9004 | if (DECL_INITIAL (fndecl) && DECL_INITIAL (fndecl) != error_mark_node |
9005 | && !undef_nested_function) | |
6de9cd9a DN |
9006 | { |
9007 | if (!decl_function_context (fndecl)) | |
c22cacf3 | 9008 | { |
1c701f96 | 9009 | invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl); |
c22cacf3 | 9010 | c_genericize (fndecl); |
1a94c545 JH |
9011 | |
9012 | /* ??? Objc emits functions after finalizing the compilation unit. | |
9013 | This should be cleaned up later and this conditional removed. */ | |
3dafb85c | 9014 | if (symtab->global_info_ready) |
1a94c545 | 9015 | { |
d52f5295 | 9016 | cgraph_node::add_new_function (fndecl, false); |
1a94c545 JH |
9017 | return; |
9018 | } | |
3dafb85c | 9019 | cgraph_node::finalize_function (fndecl, false); |
c22cacf3 | 9020 | } |
6de9cd9a | 9021 | else |
c22cacf3 MS |
9022 | { |
9023 | /* Register this function with cgraph just far enough to get it | |
9024 | added to our parent's nested function list. Handy, since the | |
9025 | C front end doesn't have such a list. */ | |
d52f5295 | 9026 | (void) cgraph_node::get_create (fndecl); |
c22cacf3 | 9027 | } |
6de9cd9a DN |
9028 | } |
9029 | ||
73aea290 JM |
9030 | if (!decl_function_context (fndecl)) |
9031 | undef_nested_function = false; | |
9032 | ||
3797cb21 DS |
9033 | if (cfun->language != NULL) |
9034 | { | |
9035 | ggc_free (cfun->language); | |
9036 | cfun->language = NULL; | |
9037 | } | |
9038 | ||
1da326c3 | 9039 | /* We're leaving the context of this function, so zap cfun. |
6de9cd9a | 9040 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in |
1da326c3 | 9041 | tree_rest_of_compilation. */ |
db2960f4 | 9042 | set_cfun (NULL); |
4a46cbfb | 9043 | current_function_decl = NULL; |
8f17b5c5 | 9044 | } |
51e29401 | 9045 | \f |
77c4d6c0 | 9046 | /* Check the declarations given in a for-loop for satisfying the C99 |
c2255bc4 | 9047 | constraints. If exactly one such decl is found, return it. LOC is |
f05b9d93 NP |
9048 | the location of the opening parenthesis of the for loop. The last |
9049 | parameter allows you to control the "for loop initial declarations | |
9050 | are only allowed in C99 mode". Normally, you should pass | |
9051 | flag_isoc99 as that parameter. But in some cases (Objective-C | |
9052 | foreach loop, for example) we want to run the checks in this | |
9053 | function even if not in C99 mode, so we allow the caller to turn | |
9054 | off the error about not being in C99 mode. | |
9055 | */ | |
953ff289 DN |
9056 | |
9057 | tree | |
f05b9d93 | 9058 | check_for_loop_decls (location_t loc, bool turn_off_iso_c99_error) |
77c4d6c0 | 9059 | { |
f75fbaf7 | 9060 | struct c_binding *b; |
953ff289 DN |
9061 | tree one_decl = NULL_TREE; |
9062 | int n_decls = 0; | |
9063 | ||
f05b9d93 | 9064 | if (!turn_off_iso_c99_error) |
77c4d6c0 | 9065 | { |
e9527cfd | 9066 | static bool hint = true; |
77c4d6c0 JM |
9067 | /* If we get here, declarations have been used in a for loop without |
9068 | the C99 for loop scope. This doesn't make much sense, so don't | |
9069 | allow it. */ | |
c2255bc4 | 9070 | error_at (loc, "%<for%> loop initial declarations " |
92f20202 | 9071 | "are only allowed in C99 or C11 mode"); |
e9527cfd MLI |
9072 | if (hint) |
9073 | { | |
c2255bc4 | 9074 | inform (loc, |
92f20202 MP |
9075 | "use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 " |
9076 | "to compile your code"); | |
e9527cfd MLI |
9077 | hint = false; |
9078 | } | |
953ff289 | 9079 | return NULL_TREE; |
77c4d6c0 JM |
9080 | } |
9081 | /* C99 subclause 6.8.5 paragraph 3: | |
9082 | ||
9083 | [#3] The declaration part of a for statement shall only | |
9084 | declare identifiers for objects having storage class auto or | |
9085 | register. | |
9086 | ||
9087 | It isn't clear whether, in this sentence, "identifiers" binds to | |
9088 | "shall only declare" or to "objects" - that is, whether all identifiers | |
9089 | declared must be identifiers for objects, or whether the restriction | |
9090 | only applies to those that are. (A question on this in comp.std.c | |
9091 | in November 2000 received no answer.) We implement the strictest | |
9092 | interpretation, to avoid creating an extension which later causes | |
9093 | problems. */ | |
9094 | ||
f75fbaf7 | 9095 | for (b = current_scope->bindings; b; b = b->prev) |
77c4d6c0 | 9096 | { |
f75fbaf7 ZW |
9097 | tree id = b->id; |
9098 | tree decl = b->decl; | |
53fcdc76 | 9099 | |
f75fbaf7 ZW |
9100 | if (!id) |
9101 | continue; | |
9102 | ||
9103 | switch (TREE_CODE (decl)) | |
9104 | { | |
9105 | case VAR_DECL: | |
c2255bc4 AH |
9106 | { |
9107 | location_t decl_loc = DECL_SOURCE_LOCATION (decl); | |
9108 | if (TREE_STATIC (decl)) | |
9109 | error_at (decl_loc, | |
9110 | "declaration of static variable %qD in %<for%> loop " | |
9111 | "initial declaration", decl); | |
9112 | else if (DECL_EXTERNAL (decl)) | |
9113 | error_at (decl_loc, | |
9114 | "declaration of %<extern%> variable %qD in %<for%> loop " | |
9115 | "initial declaration", decl); | |
9116 | } | |
f75fbaf7 ZW |
9117 | break; |
9118 | ||
9119 | case RECORD_TYPE: | |
c2255bc4 AH |
9120 | error_at (loc, |
9121 | "%<struct %E%> declared in %<for%> loop initial " | |
9122 | "declaration", id); | |
f75fbaf7 ZW |
9123 | break; |
9124 | case UNION_TYPE: | |
c2255bc4 AH |
9125 | error_at (loc, |
9126 | "%<union %E%> declared in %<for%> loop initial declaration", | |
9127 | id); | |
f75fbaf7 ZW |
9128 | break; |
9129 | case ENUMERAL_TYPE: | |
c2255bc4 AH |
9130 | error_at (loc, "%<enum %E%> declared in %<for%> loop " |
9131 | "initial declaration", id); | |
f75fbaf7 ZW |
9132 | break; |
9133 | default: | |
c2255bc4 AH |
9134 | error_at (loc, "declaration of non-variable " |
9135 | "%qD in %<for%> loop initial declaration", decl); | |
f75fbaf7 | 9136 | } |
953ff289 DN |
9137 | |
9138 | n_decls++; | |
9139 | one_decl = decl; | |
77c4d6c0 | 9140 | } |
953ff289 DN |
9141 | |
9142 | return n_decls == 1 ? one_decl : NULL_TREE; | |
77c4d6c0 JM |
9143 | } |
9144 | \f | |
51e29401 RS |
9145 | /* Save and reinitialize the variables |
9146 | used during compilation of a C function. */ | |
9147 | ||
9148 | void | |
d2784db4 | 9149 | c_push_function_context (void) |
51e29401 | 9150 | { |
b6fbbea3 MI |
9151 | struct language_function *p = cfun->language; |
9152 | /* cfun->language might have been already allocated by the use of | |
9153 | -Wunused-local-typedefs. In that case, just re-use it. */ | |
9154 | if (p == NULL) | |
766090c2 | 9155 | cfun->language = p = ggc_cleared_alloc<language_function> (); |
51e29401 | 9156 | |
8f17b5c5 | 9157 | p->base.x_stmt_tree = c_stmt_tree; |
9771b263 | 9158 | c_stmt_tree.x_cur_stmt_list = vec_safe_copy (c_stmt_tree.x_cur_stmt_list); |
506e2710 RH |
9159 | p->x_break_label = c_break_label; |
9160 | p->x_cont_label = c_cont_label; | |
9161 | p->x_switch_stack = c_switch_stack; | |
7b112487 | 9162 | p->arg_info = current_function_arg_info; |
51e29401 RS |
9163 | p->returns_value = current_function_returns_value; |
9164 | p->returns_null = current_function_returns_null; | |
5ce89b2e | 9165 | p->returns_abnormally = current_function_returns_abnormally; |
51e29401 | 9166 | p->warn_about_return_type = warn_about_return_type; |
d2784db4 PB |
9167 | |
9168 | push_function_context (); | |
51e29401 RS |
9169 | } |
9170 | ||
9171 | /* Restore the variables used during compilation of a C function. */ | |
9172 | ||
9173 | void | |
d2784db4 | 9174 | c_pop_function_context (void) |
51e29401 | 9175 | { |
d2784db4 PB |
9176 | struct language_function *p; |
9177 | ||
9178 | pop_function_context (); | |
9179 | p = cfun->language; | |
b6fbbea3 MI |
9180 | |
9181 | /* When -Wunused-local-typedefs is in effect, cfun->languages is | |
9182 | used to store data throughout the life time of the current cfun, | |
9183 | So don't deallocate it. */ | |
9184 | if (!warn_unused_local_typedefs) | |
9185 | cfun->language = NULL; | |
51e29401 | 9186 | |
1da326c3 | 9187 | if (DECL_STRUCT_FUNCTION (current_function_decl) == 0 |
8f17b5c5 | 9188 | && DECL_SAVED_TREE (current_function_decl) == NULL_TREE) |
51e29401 RS |
9189 | { |
9190 | /* Stop pointing to the local nodes about to be freed. */ | |
9191 | /* But DECL_INITIAL must remain nonzero so we know this | |
9192 | was an actual function definition. */ | |
9193 | DECL_INITIAL (current_function_decl) = error_mark_node; | |
9194 | DECL_ARGUMENTS (current_function_decl) = 0; | |
9195 | } | |
9196 | ||
8f17b5c5 | 9197 | c_stmt_tree = p->base.x_stmt_tree; |
b6fbbea3 | 9198 | p->base.x_stmt_tree.x_cur_stmt_list = NULL; |
506e2710 RH |
9199 | c_break_label = p->x_break_label; |
9200 | c_cont_label = p->x_cont_label; | |
9201 | c_switch_stack = p->x_switch_stack; | |
7b112487 | 9202 | current_function_arg_info = p->arg_info; |
51e29401 RS |
9203 | current_function_returns_value = p->returns_value; |
9204 | current_function_returns_null = p->returns_null; | |
5ce89b2e | 9205 | current_function_returns_abnormally = p->returns_abnormally; |
51e29401 | 9206 | warn_about_return_type = p->warn_about_return_type; |
1526a060 BS |
9207 | } |
9208 | ||
f2c5f623 BC |
9209 | /* The functions below are required for functionality of doing |
9210 | function at once processing in the C front end. Currently these | |
9211 | functions are not called from anywhere in the C front end, but as | |
6645c3fa | 9212 | these changes continue, that will change. */ |
f2c5f623 | 9213 | |
ae499cce MM |
9214 | /* Returns the stmt_tree (if any) to which statements are currently |
9215 | being added. If there is no active statement-tree, NULL is | |
9216 | returned. */ | |
9217 | ||
9218 | stmt_tree | |
35b1a6fa | 9219 | current_stmt_tree (void) |
ae499cce | 9220 | { |
8f17b5c5 MM |
9221 | return &c_stmt_tree; |
9222 | } | |
9223 | ||
339a28b9 | 9224 | /* Return the global value of T as a symbol. */ |
5fd8e536 JM |
9225 | |
9226 | tree | |
35b1a6fa | 9227 | identifier_global_value (tree t) |
5fd8e536 | 9228 | { |
f75fbaf7 | 9229 | struct c_binding *b; |
339a28b9 | 9230 | |
f75fbaf7 | 9231 | for (b = I_SYMBOL_BINDING (t); b; b = b->shadowed) |
9aaabf8a | 9232 | if (B_IN_FILE_SCOPE (b) || B_IN_EXTERNAL_SCOPE (b)) |
f75fbaf7 | 9233 | return b->decl; |
339a28b9 | 9234 | |
339a28b9 | 9235 | return 0; |
5fd8e536 | 9236 | } |
eaa7c03f | 9237 | |
3a636414 JM |
9238 | /* In C, the only C-linkage public declaration is at file scope. */ |
9239 | ||
9240 | tree | |
9241 | c_linkage_bindings (tree name) | |
9242 | { | |
9243 | return identifier_global_value (name); | |
9244 | } | |
9245 | ||
eaa7c03f JM |
9246 | /* Record a builtin type for C. If NAME is non-NULL, it is the name used; |
9247 | otherwise the name is found in ridpointers from RID_INDEX. */ | |
9248 | ||
9249 | void | |
35b1a6fa | 9250 | record_builtin_type (enum rid rid_index, const char *name, tree type) |
eaa7c03f | 9251 | { |
ca043393 | 9252 | tree id, decl; |
eaa7c03f JM |
9253 | if (name == 0) |
9254 | id = ridpointers[(int) rid_index]; | |
9255 | else | |
9256 | id = get_identifier (name); | |
c2255bc4 | 9257 | decl = build_decl (UNKNOWN_LOCATION, TYPE_DECL, id, type); |
ca043393 ZW |
9258 | pushdecl (decl); |
9259 | if (debug_hooks->type_decl) | |
9260 | debug_hooks->type_decl (decl, false); | |
eaa7c03f JM |
9261 | } |
9262 | ||
9263 | /* Build the void_list_node (void_type_node having been created). */ | |
9264 | tree | |
35b1a6fa | 9265 | build_void_list_node (void) |
eaa7c03f JM |
9266 | { |
9267 | tree t = build_tree_list (NULL_TREE, void_type_node); | |
9268 | return t; | |
9269 | } | |
81a75f0f | 9270 | |
f8893e47 | 9271 | /* Return a c_parm structure with the given SPECS, ATTRS and DECLARATOR. */ |
00325bce | 9272 | |
f8893e47 | 9273 | struct c_parm * |
deb176fa JM |
9274 | build_c_parm (struct c_declspecs *specs, tree attrs, |
9275 | struct c_declarator *declarator) | |
00325bce | 9276 | { |
f8893e47 JM |
9277 | struct c_parm *ret = XOBNEW (&parser_obstack, struct c_parm); |
9278 | ret->specs = specs; | |
9279 | ret->attrs = attrs; | |
9280 | ret->declarator = declarator; | |
9281 | return ret; | |
00325bce JM |
9282 | } |
9283 | ||
9284 | /* Return a declarator with nested attributes. TARGET is the inner | |
9285 | declarator to which these attributes apply. ATTRS are the | |
9286 | attributes. */ | |
9287 | ||
f8893e47 JM |
9288 | struct c_declarator * |
9289 | build_attrs_declarator (tree attrs, struct c_declarator *target) | |
00325bce | 9290 | { |
f8893e47 JM |
9291 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); |
9292 | ret->kind = cdk_attrs; | |
9293 | ret->declarator = target; | |
9294 | ret->u.attrs = attrs; | |
9295 | return ret; | |
00325bce JM |
9296 | } |
9297 | ||
9298 | /* Return a declarator for a function with arguments specified by ARGS | |
9299 | and return type specified by TARGET. */ | |
9300 | ||
f8893e47 JM |
9301 | struct c_declarator * |
9302 | build_function_declarator (struct c_arg_info *args, | |
9303 | struct c_declarator *target) | |
00325bce | 9304 | { |
f8893e47 JM |
9305 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); |
9306 | ret->kind = cdk_function; | |
9307 | ret->declarator = target; | |
9308 | ret->u.arg_info = args; | |
9309 | return ret; | |
9310 | } | |
9311 | ||
9312 | /* Return a declarator for the identifier IDENT (which may be | |
9313 | NULL_TREE for an abstract declarator). */ | |
9314 | ||
9315 | struct c_declarator * | |
9316 | build_id_declarator (tree ident) | |
9317 | { | |
9318 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); | |
9319 | ret->kind = cdk_id; | |
9320 | ret->declarator = 0; | |
9321 | ret->u.id = ident; | |
6037d88d PB |
9322 | /* Default value - may get reset to a more precise location. */ |
9323 | ret->id_loc = input_location; | |
f8893e47 | 9324 | return ret; |
00325bce JM |
9325 | } |
9326 | ||
81a75f0f NB |
9327 | /* Return something to represent absolute declarators containing a *. |
9328 | TARGET is the absolute declarator that the * contains. | |
deb176fa JM |
9329 | TYPE_QUALS_ATTRS is a structure for type qualifiers and attributes |
9330 | to apply to the pointer type. */ | |
81a75f0f | 9331 | |
f8893e47 | 9332 | struct c_declarator * |
deb176fa JM |
9333 | make_pointer_declarator (struct c_declspecs *type_quals_attrs, |
9334 | struct c_declarator *target) | |
81a75f0f | 9335 | { |
deb176fa | 9336 | tree attrs; |
3b53cddc | 9337 | int quals = 0; |
f8893e47 JM |
9338 | struct c_declarator *itarget = target; |
9339 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); | |
deb176fa JM |
9340 | if (type_quals_attrs) |
9341 | { | |
9342 | attrs = type_quals_attrs->attrs; | |
3b53cddc | 9343 | quals = quals_from_declspecs (type_quals_attrs); |
deb176fa JM |
9344 | if (attrs != NULL_TREE) |
9345 | itarget = build_attrs_declarator (attrs, target); | |
9346 | } | |
f8893e47 JM |
9347 | ret->kind = cdk_pointer; |
9348 | ret->declarator = itarget; | |
3b53cddc | 9349 | ret->u.pointer_quals = quals; |
deb176fa JM |
9350 | return ret; |
9351 | } | |
9352 | ||
9353 | /* Return a pointer to a structure for an empty list of declaration | |
9354 | specifiers. */ | |
9355 | ||
9356 | struct c_declspecs * | |
9357 | build_null_declspecs (void) | |
9358 | { | |
9359 | struct c_declspecs *ret = XOBNEW (&parser_obstack, struct c_declspecs); | |
0b2c4be5 | 9360 | memset (&ret->locations, 0, cdw_number_of_elements); |
deb176fa | 9361 | ret->type = 0; |
928c19bb | 9362 | ret->expr = 0; |
deb176fa JM |
9363 | ret->decl_attr = 0; |
9364 | ret->attrs = 0; | |
d19fa6b5 | 9365 | ret->align_log = -1; |
98c3a782 | 9366 | ret->typespec_word = cts_none; |
9a26d6ee | 9367 | ret->storage_class = csc_none; |
928c19bb | 9368 | ret->expr_const_operands = true; |
27bf414c | 9369 | ret->declspecs_seen_p = false; |
9e5b2115 | 9370 | ret->typespec_kind = ctsk_none; |
deb176fa | 9371 | ret->non_sc_seen_p = false; |
616aeba2 | 9372 | ret->typedef_p = false; |
98c3a782 | 9373 | ret->explicit_signed_p = false; |
deb176fa | 9374 | ret->deprecated_p = false; |
98c3a782 JM |
9375 | ret->default_int_p = false; |
9376 | ret->long_p = false; | |
deb176fa | 9377 | ret->long_long_p = false; |
98c3a782 JM |
9378 | ret->short_p = false; |
9379 | ret->signed_p = false; | |
9380 | ret->unsigned_p = false; | |
9381 | ret->complex_p = false; | |
9a26d6ee | 9382 | ret->inline_p = false; |
bbceee64 | 9383 | ret->noreturn_p = false; |
9a26d6ee | 9384 | ret->thread_p = false; |
582d9b50 | 9385 | ret->thread_gnu_p = false; |
3b53cddc JM |
9386 | ret->const_p = false; |
9387 | ret->volatile_p = false; | |
267bac10 | 9388 | ret->atomic_p = false; |
3b53cddc | 9389 | ret->restrict_p = false; |
ab22c1fa | 9390 | ret->saturating_p = false; |
d19fa6b5 | 9391 | ret->alignas_p = false; |
36c5e70a | 9392 | ret->address_space = ADDR_SPACE_GENERIC; |
f8893e47 | 9393 | return ret; |
81a75f0f | 9394 | } |
e2500fed | 9395 | |
36c5e70a BE |
9396 | /* Add the address space ADDRSPACE to the declaration specifiers |
9397 | SPECS, returning SPECS. */ | |
9398 | ||
9399 | struct c_declspecs * | |
0b2c4be5 DS |
9400 | declspecs_add_addrspace (source_location location, |
9401 | struct c_declspecs *specs, addr_space_t as) | |
36c5e70a BE |
9402 | { |
9403 | specs->non_sc_seen_p = true; | |
9404 | specs->declspecs_seen_p = true; | |
9405 | ||
9406 | if (!ADDR_SPACE_GENERIC_P (specs->address_space) | |
9407 | && specs->address_space != as) | |
9408 | error ("incompatible address space qualifiers %qs and %qs", | |
9409 | c_addr_space_name (as), | |
9410 | c_addr_space_name (specs->address_space)); | |
9411 | else | |
0b2c4be5 DS |
9412 | { |
9413 | specs->address_space = as; | |
9414 | specs->locations[cdw_address_space] = location; | |
9415 | } | |
36c5e70a BE |
9416 | return specs; |
9417 | } | |
9418 | ||
deb176fa JM |
9419 | /* Add the type qualifier QUAL to the declaration specifiers SPECS, |
9420 | returning SPECS. */ | |
9421 | ||
9422 | struct c_declspecs * | |
0b2c4be5 DS |
9423 | declspecs_add_qual (source_location loc, |
9424 | struct c_declspecs *specs, tree qual) | |
deb176fa JM |
9425 | { |
9426 | enum rid i; | |
3b53cddc | 9427 | bool dupe = false; |
deb176fa | 9428 | specs->non_sc_seen_p = true; |
27bf414c | 9429 | specs->declspecs_seen_p = true; |
deb176fa JM |
9430 | gcc_assert (TREE_CODE (qual) == IDENTIFIER_NODE |
9431 | && C_IS_RESERVED_WORD (qual)); | |
9432 | i = C_RID_CODE (qual); | |
3b53cddc JM |
9433 | switch (i) |
9434 | { | |
9435 | case RID_CONST: | |
9436 | dupe = specs->const_p; | |
9437 | specs->const_p = true; | |
0b2c4be5 | 9438 | specs->locations[cdw_const] = loc; |
3b53cddc JM |
9439 | break; |
9440 | case RID_VOLATILE: | |
9441 | dupe = specs->volatile_p; | |
9442 | specs->volatile_p = true; | |
0b2c4be5 | 9443 | specs->locations[cdw_volatile] = loc; |
3b53cddc JM |
9444 | break; |
9445 | case RID_RESTRICT: | |
9446 | dupe = specs->restrict_p; | |
9447 | specs->restrict_p = true; | |
0b2c4be5 | 9448 | specs->locations[cdw_restrict] = loc; |
3b53cddc | 9449 | break; |
267bac10 JM |
9450 | case RID_ATOMIC: |
9451 | dupe = specs->atomic_p; | |
9452 | specs->atomic_p = true; | |
9453 | break; | |
3b53cddc JM |
9454 | default: |
9455 | gcc_unreachable (); | |
9456 | } | |
f3bede71 MP |
9457 | if (dupe) |
9458 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %qE", qual); | |
deb176fa JM |
9459 | return specs; |
9460 | } | |
9461 | ||
9462 | /* Add the type specifier TYPE to the declaration specifiers SPECS, | |
9463 | returning SPECS. */ | |
9464 | ||
9465 | struct c_declspecs * | |
dc491a25 ILT |
9466 | declspecs_add_type (location_t loc, struct c_declspecs *specs, |
9467 | struct c_typespec spec) | |
deb176fa | 9468 | { |
81da229b | 9469 | tree type = spec.spec; |
deb176fa | 9470 | specs->non_sc_seen_p = true; |
27bf414c | 9471 | specs->declspecs_seen_p = true; |
9e5b2115 | 9472 | specs->typespec_kind = spec.kind; |
deb176fa JM |
9473 | if (TREE_DEPRECATED (type)) |
9474 | specs->deprecated_p = true; | |
deb176fa | 9475 | |
98c3a782 | 9476 | /* Handle type specifier keywords. */ |
eea1139b ILT |
9477 | if (TREE_CODE (type) == IDENTIFIER_NODE |
9478 | && C_IS_RESERVED_WORD (type) | |
9479 | && C_RID_CODE (type) != RID_CXX_COMPAT_WARN) | |
deb176fa JM |
9480 | { |
9481 | enum rid i = C_RID_CODE (type); | |
98c3a782 JM |
9482 | if (specs->type) |
9483 | { | |
dc491a25 | 9484 | error_at (loc, "two or more data types in declaration specifiers"); |
98c3a782 JM |
9485 | return specs; |
9486 | } | |
deb176fa JM |
9487 | if ((int) i <= (int) RID_LAST_MODIFIER) |
9488 | { | |
ab22c1fa | 9489 | /* "long", "short", "signed", "unsigned", "_Complex" or "_Sat". */ |
98c3a782 JM |
9490 | bool dupe = false; |
9491 | switch (i) | |
deb176fa | 9492 | { |
98c3a782 | 9493 | case RID_LONG: |
deb176fa | 9494 | if (specs->long_long_p) |
deb176fa | 9495 | { |
dc491a25 | 9496 | error_at (loc, "%<long long long%> is too long for GCC"); |
98c3a782 JM |
9497 | break; |
9498 | } | |
9499 | if (specs->long_p) | |
9500 | { | |
9501 | if (specs->typespec_word == cts_double) | |
9502 | { | |
dc491a25 ILT |
9503 | error_at (loc, |
9504 | ("both %<long long%> and %<double%> in " | |
9505 | "declaration specifiers")); | |
98c3a782 JM |
9506 | break; |
9507 | } | |
dc491a25 | 9508 | pedwarn_c90 (loc, OPT_Wlong_long, |
9c650d90 | 9509 | "ISO C90 does not support %<long long%>"); |
deb176fa | 9510 | specs->long_long_p = 1; |
0b2c4be5 | 9511 | specs->locations[cdw_long_long] = loc; |
98c3a782 | 9512 | break; |
deb176fa | 9513 | } |
98c3a782 | 9514 | if (specs->short_p) |
dc491a25 ILT |
9515 | error_at (loc, |
9516 | ("both %<long%> and %<short%> in " | |
9517 | "declaration specifiers")); | |
38b7bc7f JM |
9518 | else if (specs->typespec_word == cts_auto_type) |
9519 | error_at (loc, | |
9520 | ("both %<long%> and %<__auto_type%> in " | |
9521 | "declaration specifiers")); | |
98c3a782 | 9522 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
9523 | error_at (loc, |
9524 | ("both %<long%> and %<void%> in " | |
9525 | "declaration specifiers")); | |
78a7c317 | 9526 | else if (specs->typespec_word == cts_int_n) |
a6766312 | 9527 | error_at (loc, |
78a7c317 DD |
9528 | ("both %<long%> and %<__int%d%> in " |
9529 | "declaration specifiers"), | |
9530 | int_n_data[specs->int_n_idx].bitsize); | |
98c3a782 | 9531 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
9532 | error_at (loc, |
9533 | ("both %<long%> and %<_Bool%> in " | |
9534 | "declaration specifiers")); | |
98c3a782 | 9535 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
9536 | error_at (loc, |
9537 | ("both %<long%> and %<char%> in " | |
9538 | "declaration specifiers")); | |
98c3a782 | 9539 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
9540 | error_at (loc, |
9541 | ("both %<long%> and %<float%> in " | |
9542 | "declaration specifiers")); | |
9a8ce21f | 9543 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
9544 | error_at (loc, |
9545 | ("both %<long%> and %<_Decimal32%> in " | |
9546 | "declaration specifiers")); | |
9a8ce21f | 9547 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
9548 | error_at (loc, |
9549 | ("both %<long%> and %<_Decimal64%> in " | |
9550 | "declaration specifiers")); | |
9a8ce21f | 9551 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
9552 | error_at (loc, |
9553 | ("both %<long%> and %<_Decimal128%> in " | |
9554 | "declaration specifiers")); | |
98c3a782 | 9555 | else |
0b2c4be5 DS |
9556 | { |
9557 | specs->long_p = true; | |
9558 | specs->locations[cdw_long] = loc; | |
9559 | } | |
98c3a782 JM |
9560 | break; |
9561 | case RID_SHORT: | |
9562 | dupe = specs->short_p; | |
9563 | if (specs->long_p) | |
dc491a25 ILT |
9564 | error_at (loc, |
9565 | ("both %<long%> and %<short%> in " | |
9566 | "declaration specifiers")); | |
38b7bc7f JM |
9567 | else if (specs->typespec_word == cts_auto_type) |
9568 | error_at (loc, | |
9569 | ("both %<short%> and %<__auto_type%> in " | |
9570 | "declaration specifiers")); | |
98c3a782 | 9571 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
9572 | error_at (loc, |
9573 | ("both %<short%> and %<void%> in " | |
9574 | "declaration specifiers")); | |
78a7c317 | 9575 | else if (specs->typespec_word == cts_int_n) |
a6766312 | 9576 | error_at (loc, |
78a7c317 DD |
9577 | ("both %<short%> and %<__int%d%> in " |
9578 | "declaration specifiers"), | |
9579 | int_n_data[specs->int_n_idx].bitsize); | |
98c3a782 | 9580 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
9581 | error_at (loc, |
9582 | ("both %<short%> and %<_Bool%> in " | |
9583 | "declaration specifiers")); | |
98c3a782 | 9584 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
9585 | error_at (loc, |
9586 | ("both %<short%> and %<char%> in " | |
9587 | "declaration specifiers")); | |
98c3a782 | 9588 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
9589 | error_at (loc, |
9590 | ("both %<short%> and %<float%> in " | |
9591 | "declaration specifiers")); | |
98c3a782 | 9592 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
9593 | error_at (loc, |
9594 | ("both %<short%> and %<double%> in " | |
9595 | "declaration specifiers")); | |
9a8ce21f | 9596 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
9597 | error_at (loc, |
9598 | ("both %<short%> and %<_Decimal32%> in " | |
9599 | "declaration specifiers")); | |
9a8ce21f | 9600 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
9601 | error_at (loc, |
9602 | ("both %<short%> and %<_Decimal64%> in " | |
9603 | "declaration specifiers")); | |
9a8ce21f | 9604 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
9605 | error_at (loc, |
9606 | ("both %<short%> and %<_Decimal128%> in " | |
9607 | "declaration specifiers")); | |
98c3a782 | 9608 | else |
0b2c4be5 DS |
9609 | { |
9610 | specs->short_p = true; | |
9611 | specs->locations[cdw_short] = loc; | |
9612 | } | |
98c3a782 JM |
9613 | break; |
9614 | case RID_SIGNED: | |
9615 | dupe = specs->signed_p; | |
9616 | if (specs->unsigned_p) | |
dc491a25 ILT |
9617 | error_at (loc, |
9618 | ("both %<signed%> and %<unsigned%> in " | |
9619 | "declaration specifiers")); | |
38b7bc7f JM |
9620 | else if (specs->typespec_word == cts_auto_type) |
9621 | error_at (loc, | |
9622 | ("both %<signed%> and %<__auto_type%> in " | |
9623 | "declaration specifiers")); | |
98c3a782 | 9624 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
9625 | error_at (loc, |
9626 | ("both %<signed%> and %<void%> in " | |
9627 | "declaration specifiers")); | |
98c3a782 | 9628 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
9629 | error_at (loc, |
9630 | ("both %<signed%> and %<_Bool%> in " | |
9631 | "declaration specifiers")); | |
98c3a782 | 9632 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
9633 | error_at (loc, |
9634 | ("both %<signed%> and %<float%> in " | |
9635 | "declaration specifiers")); | |
98c3a782 | 9636 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
9637 | error_at (loc, |
9638 | ("both %<signed%> and %<double%> in " | |
9639 | "declaration specifiers")); | |
9a8ce21f | 9640 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
9641 | error_at (loc, |
9642 | ("both %<signed%> and %<_Decimal32%> in " | |
9643 | "declaration specifiers")); | |
9a8ce21f | 9644 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
9645 | error_at (loc, |
9646 | ("both %<signed%> and %<_Decimal64%> in " | |
9647 | "declaration specifiers")); | |
9a8ce21f | 9648 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
9649 | error_at (loc, |
9650 | ("both %<signed%> and %<_Decimal128%> in " | |
9651 | "declaration specifiers")); | |
98c3a782 | 9652 | else |
0b2c4be5 DS |
9653 | { |
9654 | specs->signed_p = true; | |
9655 | specs->locations[cdw_signed] = loc; | |
9656 | } | |
98c3a782 JM |
9657 | break; |
9658 | case RID_UNSIGNED: | |
9659 | dupe = specs->unsigned_p; | |
9660 | if (specs->signed_p) | |
dc491a25 ILT |
9661 | error_at (loc, |
9662 | ("both %<signed%> and %<unsigned%> in " | |
9663 | "declaration specifiers")); | |
38b7bc7f JM |
9664 | else if (specs->typespec_word == cts_auto_type) |
9665 | error_at (loc, | |
9666 | ("both %<unsigned%> and %<__auto_type%> in " | |
9667 | "declaration specifiers")); | |
98c3a782 | 9668 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
9669 | error_at (loc, |
9670 | ("both %<unsigned%> and %<void%> in " | |
9671 | "declaration specifiers")); | |
98c3a782 | 9672 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
9673 | error_at (loc, |
9674 | ("both %<unsigned%> and %<_Bool%> in " | |
9675 | "declaration specifiers")); | |
98c3a782 | 9676 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
9677 | error_at (loc, |
9678 | ("both %<unsigned%> and %<float%> in " | |
9679 | "declaration specifiers")); | |
98c3a782 | 9680 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
9681 | error_at (loc, |
9682 | ("both %<unsigned%> and %<double%> in " | |
9683 | "declaration specifiers")); | |
9a8ce21f | 9684 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
9685 | error_at (loc, |
9686 | ("both %<unsigned%> and %<_Decimal32%> in " | |
9687 | "declaration specifiers")); | |
9a8ce21f | 9688 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
9689 | error_at (loc, |
9690 | ("both %<unsigned%> and %<_Decimal64%> in " | |
9691 | "declaration specifiers")); | |
9a8ce21f | 9692 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
9693 | error_at (loc, |
9694 | ("both %<unsigned%> and %<_Decimal128%> in " | |
9695 | "declaration specifiers")); | |
98c3a782 | 9696 | else |
0b2c4be5 DS |
9697 | { |
9698 | specs->unsigned_p = true; | |
9699 | specs->locations[cdw_unsigned] = loc; | |
9700 | } | |
98c3a782 JM |
9701 | break; |
9702 | case RID_COMPLEX: | |
9703 | dupe = specs->complex_p; | |
f3bede71 MP |
9704 | if (!in_system_header_at (loc)) |
9705 | pedwarn_c90 (loc, OPT_Wpedantic, | |
9706 | "ISO C90 does not support complex types"); | |
38b7bc7f JM |
9707 | if (specs->typespec_word == cts_auto_type) |
9708 | error_at (loc, | |
9709 | ("both %<complex%> and %<__auto_type%> in " | |
9710 | "declaration specifiers")); | |
9711 | else if (specs->typespec_word == cts_void) | |
dc491a25 ILT |
9712 | error_at (loc, |
9713 | ("both %<complex%> and %<void%> in " | |
9714 | "declaration specifiers")); | |
98c3a782 | 9715 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
9716 | error_at (loc, |
9717 | ("both %<complex%> and %<_Bool%> in " | |
9718 | "declaration specifiers")); | |
9a8ce21f | 9719 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
9720 | error_at (loc, |
9721 | ("both %<complex%> and %<_Decimal32%> in " | |
9722 | "declaration specifiers")); | |
9a8ce21f | 9723 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
9724 | error_at (loc, |
9725 | ("both %<complex%> and %<_Decimal64%> in " | |
9726 | "declaration specifiers")); | |
9a8ce21f | 9727 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
9728 | error_at (loc, |
9729 | ("both %<complex%> and %<_Decimal128%> in " | |
9730 | "declaration specifiers")); | |
ab22c1fa | 9731 | else if (specs->typespec_word == cts_fract) |
dc491a25 ILT |
9732 | error_at (loc, |
9733 | ("both %<complex%> and %<_Fract%> in " | |
9734 | "declaration specifiers")); | |
ab22c1fa | 9735 | else if (specs->typespec_word == cts_accum) |
dc491a25 ILT |
9736 | error_at (loc, |
9737 | ("both %<complex%> and %<_Accum%> in " | |
9738 | "declaration specifiers")); | |
ab22c1fa | 9739 | else if (specs->saturating_p) |
dc491a25 ILT |
9740 | error_at (loc, |
9741 | ("both %<complex%> and %<_Sat%> in " | |
9742 | "declaration specifiers")); | |
98c3a782 | 9743 | else |
0b2c4be5 DS |
9744 | { |
9745 | specs->complex_p = true; | |
9746 | specs->locations[cdw_complex] = loc; | |
9747 | } | |
98c3a782 | 9748 | break; |
ab22c1fa CF |
9749 | case RID_SAT: |
9750 | dupe = specs->saturating_p; | |
c1771a20 | 9751 | pedwarn (loc, OPT_Wpedantic, |
dc491a25 | 9752 | "ISO C does not support saturating types"); |
78a7c317 | 9753 | if (specs->typespec_word == cts_int_n) |
a6766312 KT |
9754 | { |
9755 | error_at (loc, | |
78a7c317 DD |
9756 | ("both %<_Sat%> and %<__int%d%> in " |
9757 | "declaration specifiers"), | |
9758 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 | 9759 | } |
38b7bc7f JM |
9760 | else if (specs->typespec_word == cts_auto_type) |
9761 | error_at (loc, | |
9762 | ("both %<_Sat%> and %<__auto_type%> in " | |
9763 | "declaration specifiers")); | |
a6766312 | 9764 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
9765 | error_at (loc, |
9766 | ("both %<_Sat%> and %<void%> in " | |
9767 | "declaration specifiers")); | |
ab22c1fa | 9768 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
9769 | error_at (loc, |
9770 | ("both %<_Sat%> and %<_Bool%> in " | |
9771 | "declaration specifiers")); | |
ab22c1fa | 9772 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
9773 | error_at (loc, |
9774 | ("both %<_Sat%> and %<char%> in " | |
9775 | "declaration specifiers")); | |
ab22c1fa | 9776 | else if (specs->typespec_word == cts_int) |
dc491a25 ILT |
9777 | error_at (loc, |
9778 | ("both %<_Sat%> and %<int%> in " | |
9779 | "declaration specifiers")); | |
ab22c1fa | 9780 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
9781 | error_at (loc, |
9782 | ("both %<_Sat%> and %<float%> in " | |
9783 | "declaration specifiers")); | |
ab22c1fa | 9784 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
9785 | error_at (loc, |
9786 | ("both %<_Sat%> and %<double%> in " | |
9787 | "declaration specifiers")); | |
ab22c1fa | 9788 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
9789 | error_at (loc, |
9790 | ("both %<_Sat%> and %<_Decimal32%> in " | |
9791 | "declaration specifiers")); | |
ab22c1fa | 9792 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
9793 | error_at (loc, |
9794 | ("both %<_Sat%> and %<_Decimal64%> in " | |
9795 | "declaration specifiers")); | |
ab22c1fa | 9796 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
9797 | error_at (loc, |
9798 | ("both %<_Sat%> and %<_Decimal128%> in " | |
9799 | "declaration specifiers")); | |
ab22c1fa | 9800 | else if (specs->complex_p) |
dc491a25 ILT |
9801 | error_at (loc, |
9802 | ("both %<_Sat%> and %<complex%> in " | |
9803 | "declaration specifiers")); | |
ab22c1fa | 9804 | else |
0b2c4be5 DS |
9805 | { |
9806 | specs->saturating_p = true; | |
9807 | specs->locations[cdw_saturating] = loc; | |
9808 | } | |
ab22c1fa | 9809 | break; |
98c3a782 JM |
9810 | default: |
9811 | gcc_unreachable (); | |
deb176fa | 9812 | } |
98c3a782 JM |
9813 | |
9814 | if (dupe) | |
dc491a25 | 9815 | error_at (loc, "duplicate %qE", type); |
deb176fa | 9816 | |
deb176fa JM |
9817 | return specs; |
9818 | } | |
98c3a782 JM |
9819 | else |
9820 | { | |
ab22c1fa | 9821 | /* "void", "_Bool", "char", "int", "float", "double", "_Decimal32", |
78a7c317 | 9822 | "__intN", "_Decimal64", "_Decimal128", "_Fract", "_Accum" or |
38b7bc7f | 9823 | "__auto_type". */ |
98c3a782 JM |
9824 | if (specs->typespec_word != cts_none) |
9825 | { | |
dc491a25 ILT |
9826 | error_at (loc, |
9827 | "two or more data types in declaration specifiers"); | |
98c3a782 JM |
9828 | return specs; |
9829 | } | |
9830 | switch (i) | |
9831 | { | |
38b7bc7f JM |
9832 | case RID_AUTO_TYPE: |
9833 | if (specs->long_p) | |
9834 | error_at (loc, | |
9835 | ("both %<long%> and %<__auto_type%> in " | |
9836 | "declaration specifiers")); | |
9837 | else if (specs->short_p) | |
9838 | error_at (loc, | |
9839 | ("both %<short%> and %<__auto_type%> in " | |
9840 | "declaration specifiers")); | |
9841 | else if (specs->signed_p) | |
9842 | error_at (loc, | |
9843 | ("both %<signed%> and %<__auto_type%> in " | |
9844 | "declaration specifiers")); | |
9845 | else if (specs->unsigned_p) | |
9846 | error_at (loc, | |
9847 | ("both %<unsigned%> and %<__auto_type%> in " | |
9848 | "declaration specifiers")); | |
9849 | else if (specs->complex_p) | |
9850 | error_at (loc, | |
9851 | ("both %<complex%> and %<__auto_type%> in " | |
9852 | "declaration specifiers")); | |
9853 | else if (specs->saturating_p) | |
9854 | error_at (loc, | |
9855 | ("both %<_Sat%> and %<__auto_type%> in " | |
9856 | "declaration specifiers")); | |
9857 | else | |
9858 | { | |
9859 | specs->typespec_word = cts_auto_type; | |
9860 | specs->locations[cdw_typespec] = loc; | |
9861 | } | |
9862 | return specs; | |
78a7c317 DD |
9863 | case RID_INT_N_0: |
9864 | case RID_INT_N_1: | |
9865 | case RID_INT_N_2: | |
9866 | case RID_INT_N_3: | |
9867 | specs->int_n_idx = i - RID_INT_N_0; | |
9edc6e4c | 9868 | if (!in_system_header_at (input_location)) |
c1771a20 | 9869 | pedwarn (loc, OPT_Wpedantic, |
78a7c317 DD |
9870 | "ISO C does not support %<__int%d%> types", |
9871 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
9872 | |
9873 | if (specs->long_p) | |
9874 | error_at (loc, | |
78a7c317 DD |
9875 | ("both %<__int%d%> and %<long%> in " |
9876 | "declaration specifiers"), | |
9877 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
9878 | else if (specs->saturating_p) |
9879 | error_at (loc, | |
78a7c317 DD |
9880 | ("both %<_Sat%> and %<__int%d%> in " |
9881 | "declaration specifiers"), | |
9882 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
9883 | else if (specs->short_p) |
9884 | error_at (loc, | |
78a7c317 DD |
9885 | ("both %<__int%d%> and %<short%> in " |
9886 | "declaration specifiers"), | |
9887 | int_n_data[specs->int_n_idx].bitsize); | |
9888 | else if (! int_n_enabled_p [specs->int_n_idx]) | |
9889 | error_at (loc, | |
9890 | "%<__int%d%> is not supported on this target", | |
9891 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 | 9892 | else |
0b2c4be5 | 9893 | { |
78a7c317 | 9894 | specs->typespec_word = cts_int_n; |
0b2c4be5 DS |
9895 | specs->locations[cdw_typespec] = loc; |
9896 | } | |
a6766312 | 9897 | return specs; |
98c3a782 JM |
9898 | case RID_VOID: |
9899 | if (specs->long_p) | |
dc491a25 ILT |
9900 | error_at (loc, |
9901 | ("both %<long%> and %<void%> in " | |
9902 | "declaration specifiers")); | |
98c3a782 | 9903 | else if (specs->short_p) |
dc491a25 ILT |
9904 | error_at (loc, |
9905 | ("both %<short%> and %<void%> in " | |
9906 | "declaration specifiers")); | |
98c3a782 | 9907 | else if (specs->signed_p) |
dc491a25 ILT |
9908 | error_at (loc, |
9909 | ("both %<signed%> and %<void%> in " | |
9910 | "declaration specifiers")); | |
98c3a782 | 9911 | else if (specs->unsigned_p) |
dc491a25 ILT |
9912 | error_at (loc, |
9913 | ("both %<unsigned%> and %<void%> in " | |
9914 | "declaration specifiers")); | |
98c3a782 | 9915 | else if (specs->complex_p) |
dc491a25 ILT |
9916 | error_at (loc, |
9917 | ("both %<complex%> and %<void%> in " | |
9918 | "declaration specifiers")); | |
ab22c1fa | 9919 | else if (specs->saturating_p) |
dc491a25 ILT |
9920 | error_at (loc, |
9921 | ("both %<_Sat%> and %<void%> in " | |
9922 | "declaration specifiers")); | |
98c3a782 | 9923 | else |
0b2c4be5 DS |
9924 | { |
9925 | specs->typespec_word = cts_void; | |
9926 | specs->locations[cdw_typespec] = loc; | |
9927 | } | |
98c3a782 JM |
9928 | return specs; |
9929 | case RID_BOOL: | |
f3bede71 MP |
9930 | if (!in_system_header_at (loc)) |
9931 | pedwarn_c90 (loc, OPT_Wpedantic, | |
9932 | "ISO C90 does not support boolean types"); | |
98c3a782 | 9933 | if (specs->long_p) |
dc491a25 ILT |
9934 | error_at (loc, |
9935 | ("both %<long%> and %<_Bool%> in " | |
9936 | "declaration specifiers")); | |
98c3a782 | 9937 | else if (specs->short_p) |
dc491a25 ILT |
9938 | error_at (loc, |
9939 | ("both %<short%> and %<_Bool%> in " | |
9940 | "declaration specifiers")); | |
98c3a782 | 9941 | else if (specs->signed_p) |
dc491a25 ILT |
9942 | error_at (loc, |
9943 | ("both %<signed%> and %<_Bool%> in " | |
9944 | "declaration specifiers")); | |
98c3a782 | 9945 | else if (specs->unsigned_p) |
dc491a25 ILT |
9946 | error_at (loc, |
9947 | ("both %<unsigned%> and %<_Bool%> in " | |
9948 | "declaration specifiers")); | |
98c3a782 | 9949 | else if (specs->complex_p) |
dc491a25 ILT |
9950 | error_at (loc, |
9951 | ("both %<complex%> and %<_Bool%> in " | |
9952 | "declaration specifiers")); | |
ab22c1fa | 9953 | else if (specs->saturating_p) |
dc491a25 ILT |
9954 | error_at (loc, |
9955 | ("both %<_Sat%> and %<_Bool%> in " | |
9956 | "declaration specifiers")); | |
98c3a782 | 9957 | else |
0b2c4be5 DS |
9958 | { |
9959 | specs->typespec_word = cts_bool; | |
9960 | specs->locations[cdw_typespec] = loc; | |
9961 | } | |
98c3a782 JM |
9962 | return specs; |
9963 | case RID_CHAR: | |
9964 | if (specs->long_p) | |
dc491a25 ILT |
9965 | error_at (loc, |
9966 | ("both %<long%> and %<char%> in " | |
9967 | "declaration specifiers")); | |
98c3a782 | 9968 | else if (specs->short_p) |
dc491a25 ILT |
9969 | error_at (loc, |
9970 | ("both %<short%> and %<char%> in " | |
9971 | "declaration specifiers")); | |
ab22c1fa | 9972 | else if (specs->saturating_p) |
dc491a25 ILT |
9973 | error_at (loc, |
9974 | ("both %<_Sat%> and %<char%> in " | |
9975 | "declaration specifiers")); | |
98c3a782 | 9976 | else |
0b2c4be5 DS |
9977 | { |
9978 | specs->typespec_word = cts_char; | |
9979 | specs->locations[cdw_typespec] = loc; | |
9980 | } | |
98c3a782 JM |
9981 | return specs; |
9982 | case RID_INT: | |
ab22c1fa | 9983 | if (specs->saturating_p) |
dc491a25 ILT |
9984 | error_at (loc, |
9985 | ("both %<_Sat%> and %<int%> in " | |
9986 | "declaration specifiers")); | |
ab22c1fa | 9987 | else |
0b2c4be5 DS |
9988 | { |
9989 | specs->typespec_word = cts_int; | |
9990 | specs->locations[cdw_typespec] = loc; | |
9991 | } | |
98c3a782 JM |
9992 | return specs; |
9993 | case RID_FLOAT: | |
9994 | if (specs->long_p) | |
dc491a25 ILT |
9995 | error_at (loc, |
9996 | ("both %<long%> and %<float%> in " | |
9997 | "declaration specifiers")); | |
98c3a782 | 9998 | else if (specs->short_p) |
dc491a25 ILT |
9999 | error_at (loc, |
10000 | ("both %<short%> and %<float%> in " | |
10001 | "declaration specifiers")); | |
98c3a782 | 10002 | else if (specs->signed_p) |
dc491a25 ILT |
10003 | error_at (loc, |
10004 | ("both %<signed%> and %<float%> in " | |
10005 | "declaration specifiers")); | |
98c3a782 | 10006 | else if (specs->unsigned_p) |
dc491a25 ILT |
10007 | error_at (loc, |
10008 | ("both %<unsigned%> and %<float%> in " | |
10009 | "declaration specifiers")); | |
ab22c1fa | 10010 | else if (specs->saturating_p) |
dc491a25 ILT |
10011 | error_at (loc, |
10012 | ("both %<_Sat%> and %<float%> in " | |
10013 | "declaration specifiers")); | |
98c3a782 | 10014 | else |
0b2c4be5 DS |
10015 | { |
10016 | specs->typespec_word = cts_float; | |
10017 | specs->locations[cdw_typespec] = loc; | |
10018 | } | |
98c3a782 JM |
10019 | return specs; |
10020 | case RID_DOUBLE: | |
10021 | if (specs->long_long_p) | |
dc491a25 ILT |
10022 | error_at (loc, |
10023 | ("both %<long long%> and %<double%> in " | |
10024 | "declaration specifiers")); | |
98c3a782 | 10025 | else if (specs->short_p) |
dc491a25 ILT |
10026 | error_at (loc, |
10027 | ("both %<short%> and %<double%> in " | |
10028 | "declaration specifiers")); | |
98c3a782 | 10029 | else if (specs->signed_p) |
dc491a25 ILT |
10030 | error_at (loc, |
10031 | ("both %<signed%> and %<double%> in " | |
10032 | "declaration specifiers")); | |
98c3a782 | 10033 | else if (specs->unsigned_p) |
dc491a25 ILT |
10034 | error_at (loc, |
10035 | ("both %<unsigned%> and %<double%> in " | |
10036 | "declaration specifiers")); | |
ab22c1fa | 10037 | else if (specs->saturating_p) |
dc491a25 ILT |
10038 | error_at (loc, |
10039 | ("both %<_Sat%> and %<double%> in " | |
10040 | "declaration specifiers")); | |
98c3a782 | 10041 | else |
0b2c4be5 DS |
10042 | { |
10043 | specs->typespec_word = cts_double; | |
10044 | specs->locations[cdw_typespec] = loc; | |
10045 | } | |
98c3a782 | 10046 | return specs; |
9a8ce21f JG |
10047 | case RID_DFLOAT32: |
10048 | case RID_DFLOAT64: | |
10049 | case RID_DFLOAT128: | |
b8698a0f | 10050 | { |
9a8ce21f JG |
10051 | const char *str; |
10052 | if (i == RID_DFLOAT32) | |
10053 | str = "_Decimal32"; | |
10054 | else if (i == RID_DFLOAT64) | |
10055 | str = "_Decimal64"; | |
10056 | else | |
10057 | str = "_Decimal128"; | |
10058 | if (specs->long_long_p) | |
dc491a25 ILT |
10059 | error_at (loc, |
10060 | ("both %<long long%> and %<%s%> in " | |
10061 | "declaration specifiers"), | |
10062 | str); | |
9a8ce21f | 10063 | if (specs->long_p) |
dc491a25 ILT |
10064 | error_at (loc, |
10065 | ("both %<long%> and %<%s%> in " | |
10066 | "declaration specifiers"), | |
10067 | str); | |
9a8ce21f | 10068 | else if (specs->short_p) |
dc491a25 ILT |
10069 | error_at (loc, |
10070 | ("both %<short%> and %<%s%> in " | |
10071 | "declaration specifiers"), | |
10072 | str); | |
9a8ce21f | 10073 | else if (specs->signed_p) |
dc491a25 ILT |
10074 | error_at (loc, |
10075 | ("both %<signed%> and %<%s%> in " | |
10076 | "declaration specifiers"), | |
10077 | str); | |
9a8ce21f | 10078 | else if (specs->unsigned_p) |
dc491a25 ILT |
10079 | error_at (loc, |
10080 | ("both %<unsigned%> and %<%s%> in " | |
10081 | "declaration specifiers"), | |
10082 | str); | |
9a8ce21f | 10083 | else if (specs->complex_p) |
dc491a25 ILT |
10084 | error_at (loc, |
10085 | ("both %<complex%> and %<%s%> in " | |
10086 | "declaration specifiers"), | |
10087 | str); | |
ab22c1fa | 10088 | else if (specs->saturating_p) |
dc491a25 ILT |
10089 | error_at (loc, |
10090 | ("both %<_Sat%> and %<%s%> in " | |
10091 | "declaration specifiers"), | |
10092 | str); | |
9a8ce21f JG |
10093 | else if (i == RID_DFLOAT32) |
10094 | specs->typespec_word = cts_dfloat32; | |
10095 | else if (i == RID_DFLOAT64) | |
10096 | specs->typespec_word = cts_dfloat64; | |
10097 | else | |
10098 | specs->typespec_word = cts_dfloat128; | |
0b2c4be5 | 10099 | specs->locations[cdw_typespec] = loc; |
9a8ce21f JG |
10100 | } |
10101 | if (!targetm.decimal_float_supported_p ()) | |
dc491a25 ILT |
10102 | error_at (loc, |
10103 | ("decimal floating point not supported " | |
10104 | "for this target")); | |
c1771a20 | 10105 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 10106 | "ISO C does not support decimal floating point"); |
9a8ce21f | 10107 | return specs; |
ab22c1fa CF |
10108 | case RID_FRACT: |
10109 | case RID_ACCUM: | |
10110 | { | |
10111 | const char *str; | |
10112 | if (i == RID_FRACT) | |
10113 | str = "_Fract"; | |
10114 | else | |
10115 | str = "_Accum"; | |
10116 | if (specs->complex_p) | |
dc491a25 ILT |
10117 | error_at (loc, |
10118 | ("both %<complex%> and %<%s%> in " | |
10119 | "declaration specifiers"), | |
10120 | str); | |
ab22c1fa CF |
10121 | else if (i == RID_FRACT) |
10122 | specs->typespec_word = cts_fract; | |
10123 | else | |
10124 | specs->typespec_word = cts_accum; | |
0b2c4be5 | 10125 | specs->locations[cdw_typespec] = loc; |
ab22c1fa CF |
10126 | } |
10127 | if (!targetm.fixed_point_supported_p ()) | |
dc491a25 ILT |
10128 | error_at (loc, |
10129 | "fixed-point types not supported for this target"); | |
c1771a20 | 10130 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 10131 | "ISO C does not support fixed-point types"); |
ab22c1fa | 10132 | return specs; |
98c3a782 JM |
10133 | default: |
10134 | /* ObjC reserved word "id", handled below. */ | |
10135 | break; | |
10136 | } | |
10137 | } | |
deb176fa | 10138 | } |
98c3a782 JM |
10139 | |
10140 | /* Now we have a typedef (a TYPE_DECL node), an identifier (some | |
10141 | form of ObjC type, cases such as "int" and "long" being handled | |
10142 | above), a TYPE (struct, union, enum and typeof specifiers) or an | |
10143 | ERROR_MARK. In none of these cases may there have previously | |
10144 | been any type specifiers. */ | |
10145 | if (specs->type || specs->typespec_word != cts_none | |
10146 | || specs->long_p || specs->short_p || specs->signed_p | |
10147 | || specs->unsigned_p || specs->complex_p) | |
dc491a25 | 10148 | error_at (loc, "two or more data types in declaration specifiers"); |
deb176fa JM |
10149 | else if (TREE_CODE (type) == TYPE_DECL) |
10150 | { | |
10151 | if (TREE_TYPE (type) == error_mark_node) | |
10152 | ; /* Allow the type to default to int to avoid cascading errors. */ | |
10153 | else | |
10154 | { | |
10155 | specs->type = TREE_TYPE (type); | |
10156 | specs->decl_attr = DECL_ATTRIBUTES (type); | |
616aeba2 | 10157 | specs->typedef_p = true; |
98c3a782 | 10158 | specs->explicit_signed_p = C_TYPEDEF_EXPLICITLY_SIGNED (type); |
0b2c4be5 | 10159 | specs->locations[cdw_typedef] = loc; |
dc491a25 ILT |
10160 | |
10161 | /* If this typedef name is defined in a struct, then a C++ | |
10162 | lookup would return a different value. */ | |
10163 | if (warn_cxx_compat | |
10164 | && I_SYMBOL_BINDING (DECL_NAME (type))->in_struct) | |
10165 | warning_at (loc, OPT_Wc___compat, | |
10166 | "C++ lookup of %qD would return a field, not a type", | |
10167 | type); | |
10168 | ||
10169 | /* If we are parsing a struct, record that a struct field | |
10170 | used a typedef. */ | |
10171 | if (warn_cxx_compat && struct_parse_info != NULL) | |
9771b263 | 10172 | struct_parse_info->typedefs_seen.safe_push (type); |
deb176fa JM |
10173 | } |
10174 | } | |
deb176fa JM |
10175 | else if (TREE_CODE (type) == IDENTIFIER_NODE) |
10176 | { | |
10177 | tree t = lookup_name (type); | |
10178 | if (!t || TREE_CODE (t) != TYPE_DECL) | |
dc491a25 | 10179 | error_at (loc, "%qE fails to be a typedef or built in type", type); |
deb176fa JM |
10180 | else if (TREE_TYPE (t) == error_mark_node) |
10181 | ; | |
10182 | else | |
0b2c4be5 DS |
10183 | { |
10184 | specs->type = TREE_TYPE (t); | |
10185 | specs->locations[cdw_typespec] = loc; | |
10186 | } | |
deb176fa | 10187 | } |
29ce73cb | 10188 | else |
81da229b | 10189 | { |
29ce73cb | 10190 | if (TREE_CODE (type) != ERROR_MARK && spec.kind == ctsk_typeof) |
928c19bb JM |
10191 | { |
10192 | specs->typedef_p = true; | |
0b2c4be5 | 10193 | specs->locations[cdw_typedef] = loc; |
928c19bb JM |
10194 | if (spec.expr) |
10195 | { | |
10196 | if (specs->expr) | |
10197 | specs->expr = build2 (COMPOUND_EXPR, TREE_TYPE (spec.expr), | |
10198 | specs->expr, spec.expr); | |
10199 | else | |
10200 | specs->expr = spec.expr; | |
10201 | specs->expr_const_operands &= spec.expr_const_operands; | |
10202 | } | |
10203 | } | |
81da229b JM |
10204 | specs->type = type; |
10205 | } | |
deb176fa JM |
10206 | |
10207 | return specs; | |
10208 | } | |
10209 | ||
10210 | /* Add the storage class specifier or function specifier SCSPEC to the | |
10211 | declaration specifiers SPECS, returning SPECS. */ | |
10212 | ||
10213 | struct c_declspecs * | |
0b2c4be5 DS |
10214 | declspecs_add_scspec (source_location loc, |
10215 | struct c_declspecs *specs, | |
10216 | tree scspec) | |
deb176fa JM |
10217 | { |
10218 | enum rid i; | |
9a26d6ee JM |
10219 | enum c_storage_class n = csc_none; |
10220 | bool dupe = false; | |
27bf414c | 10221 | specs->declspecs_seen_p = true; |
deb176fa JM |
10222 | gcc_assert (TREE_CODE (scspec) == IDENTIFIER_NODE |
10223 | && C_IS_RESERVED_WORD (scspec)); | |
10224 | i = C_RID_CODE (scspec); | |
b1ed4cb4 | 10225 | if (specs->non_sc_seen_p) |
b8698a0f | 10226 | warning (OPT_Wold_style_declaration, |
b1ed4cb4 | 10227 | "%qE is not at beginning of declaration", scspec); |
9a26d6ee JM |
10228 | switch (i) |
10229 | { | |
10230 | case RID_INLINE: | |
61f4f1cc JM |
10231 | /* C99 permits duplicate inline. Although of doubtful utility, |
10232 | it seems simplest to permit it in gnu89 mode as well, as | |
10233 | there is also little utility in maintaining this as a | |
10234 | difference between gnu89 and C99 inline. */ | |
10235 | dupe = false; | |
9a26d6ee | 10236 | specs->inline_p = true; |
0b2c4be5 | 10237 | specs->locations[cdw_inline] = loc; |
9a26d6ee | 10238 | break; |
bbceee64 JM |
10239 | case RID_NORETURN: |
10240 | /* Duplicate _Noreturn is permitted. */ | |
10241 | dupe = false; | |
10242 | specs->noreturn_p = true; | |
0b2c4be5 | 10243 | specs->locations[cdw_noreturn] = loc; |
bbceee64 | 10244 | break; |
9a26d6ee JM |
10245 | case RID_THREAD: |
10246 | dupe = specs->thread_p; | |
10247 | if (specs->storage_class == csc_auto) | |
582d9b50 | 10248 | error ("%qE used with %<auto%>", scspec); |
9a26d6ee | 10249 | else if (specs->storage_class == csc_register) |
582d9b50 | 10250 | error ("%qE used with %<register%>", scspec); |
9a26d6ee | 10251 | else if (specs->storage_class == csc_typedef) |
582d9b50 | 10252 | error ("%qE used with %<typedef%>", scspec); |
9a26d6ee | 10253 | else |
0b2c4be5 DS |
10254 | { |
10255 | specs->thread_p = true; | |
582d9b50 JM |
10256 | specs->thread_gnu_p = (strcmp (IDENTIFIER_POINTER (scspec), |
10257 | "__thread") == 0); | |
10258 | /* A diagnostic is not required for the use of this | |
10259 | identifier in the implementation namespace; only diagnose | |
10260 | it for the C11 spelling because of existing code using | |
10261 | the other spelling. */ | |
35aff4fb | 10262 | if (!specs->thread_gnu_p) |
582d9b50 JM |
10263 | { |
10264 | if (flag_isoc99) | |
35aff4fb MP |
10265 | pedwarn_c99 (loc, OPT_Wpedantic, |
10266 | "ISO C99 does not support %qE", scspec); | |
582d9b50 | 10267 | else |
35aff4fb MP |
10268 | pedwarn_c99 (loc, OPT_Wpedantic, |
10269 | "ISO C90 does not support %qE", scspec); | |
582d9b50 | 10270 | } |
0b2c4be5 DS |
10271 | specs->locations[cdw_thread] = loc; |
10272 | } | |
9a26d6ee JM |
10273 | break; |
10274 | case RID_AUTO: | |
10275 | n = csc_auto; | |
10276 | break; | |
10277 | case RID_EXTERN: | |
10278 | n = csc_extern; | |
10279 | /* Diagnose "__thread extern". */ | |
582d9b50 | 10280 | if (specs->thread_p && specs->thread_gnu_p) |
deb176fa | 10281 | error ("%<__thread%> before %<extern%>"); |
9a26d6ee JM |
10282 | break; |
10283 | case RID_REGISTER: | |
10284 | n = csc_register; | |
10285 | break; | |
10286 | case RID_STATIC: | |
10287 | n = csc_static; | |
10288 | /* Diagnose "__thread static". */ | |
582d9b50 | 10289 | if (specs->thread_p && specs->thread_gnu_p) |
deb176fa | 10290 | error ("%<__thread%> before %<static%>"); |
9a26d6ee JM |
10291 | break; |
10292 | case RID_TYPEDEF: | |
10293 | n = csc_typedef; | |
10294 | break; | |
10295 | default: | |
10296 | gcc_unreachable (); | |
10297 | } | |
10298 | if (n != csc_none && n == specs->storage_class) | |
10299 | dupe = true; | |
10300 | if (dupe) | |
582d9b50 JM |
10301 | { |
10302 | if (i == RID_THREAD) | |
10303 | error ("duplicate %<_Thread_local%> or %<__thread%>"); | |
10304 | else | |
10305 | error ("duplicate %qE", scspec); | |
10306 | } | |
9a26d6ee JM |
10307 | if (n != csc_none) |
10308 | { | |
10309 | if (specs->storage_class != csc_none && n != specs->storage_class) | |
10310 | { | |
10311 | error ("multiple storage classes in declaration specifiers"); | |
10312 | } | |
10313 | else | |
10314 | { | |
10315 | specs->storage_class = n; | |
0b2c4be5 | 10316 | specs->locations[cdw_storage_class] = loc; |
9a26d6ee JM |
10317 | if (n != csc_extern && n != csc_static && specs->thread_p) |
10318 | { | |
582d9b50 JM |
10319 | error ("%qs used with %qE", |
10320 | specs->thread_gnu_p ? "__thread" : "_Thread_local", | |
10321 | scspec); | |
9a26d6ee JM |
10322 | specs->thread_p = false; |
10323 | } | |
10324 | } | |
deb176fa | 10325 | } |
deb176fa JM |
10326 | return specs; |
10327 | } | |
10328 | ||
10329 | /* Add the attributes ATTRS to the declaration specifiers SPECS, | |
10330 | returning SPECS. */ | |
10331 | ||
10332 | struct c_declspecs * | |
0b2c4be5 | 10333 | declspecs_add_attrs (source_location loc, struct c_declspecs *specs, tree attrs) |
deb176fa JM |
10334 | { |
10335 | specs->attrs = chainon (attrs, specs->attrs); | |
0b2c4be5 | 10336 | specs->locations[cdw_attributes] = loc; |
27bf414c | 10337 | specs->declspecs_seen_p = true; |
deb176fa JM |
10338 | return specs; |
10339 | } | |
10340 | ||
d19fa6b5 JM |
10341 | /* Add an _Alignas specifier (expression ALIGN, or type whose |
10342 | alignment is ALIGN) to the declaration specifiers SPECS, returning | |
10343 | SPECS. */ | |
10344 | struct c_declspecs * | |
0b2c4be5 DS |
10345 | declspecs_add_alignas (source_location loc, |
10346 | struct c_declspecs *specs, tree align) | |
d19fa6b5 JM |
10347 | { |
10348 | int align_log; | |
10349 | specs->alignas_p = true; | |
0b2c4be5 | 10350 | specs->locations[cdw_alignas] = loc; |
d19fa6b5 JM |
10351 | if (align == error_mark_node) |
10352 | return specs; | |
10353 | align_log = check_user_alignment (align, true); | |
10354 | if (align_log > specs->align_log) | |
10355 | specs->align_log = align_log; | |
10356 | return specs; | |
10357 | } | |
10358 | ||
98c3a782 JM |
10359 | /* Combine "long", "short", "signed", "unsigned" and "_Complex" type |
10360 | specifiers with any other type specifier to determine the resulting | |
10361 | type. This is where ISO C checks on complex types are made, since | |
10362 | "_Complex long" is a prefix of the valid ISO C type "_Complex long | |
10363 | double". */ | |
10364 | ||
10365 | struct c_declspecs * | |
10366 | finish_declspecs (struct c_declspecs *specs) | |
10367 | { | |
10368 | /* If a type was specified as a whole, we have no modifiers and are | |
10369 | done. */ | |
10370 | if (specs->type != NULL_TREE) | |
10371 | { | |
10372 | gcc_assert (!specs->long_p && !specs->long_long_p && !specs->short_p | |
10373 | && !specs->signed_p && !specs->unsigned_p | |
10374 | && !specs->complex_p); | |
29ce73cb PB |
10375 | |
10376 | /* Set a dummy type. */ | |
10377 | if (TREE_CODE (specs->type) == ERROR_MARK) | |
10378 | specs->type = integer_type_node; | |
98c3a782 JM |
10379 | return specs; |
10380 | } | |
10381 | ||
10382 | /* If none of "void", "_Bool", "char", "int", "float" or "double" | |
10383 | has been specified, treat it as "int" unless "_Complex" is | |
10384 | present and there are no other specifiers. If we just have | |
10385 | "_Complex", it is equivalent to "_Complex double", but e.g. | |
10386 | "_Complex short" is equivalent to "_Complex short int". */ | |
10387 | if (specs->typespec_word == cts_none) | |
10388 | { | |
ab22c1fa | 10389 | if (specs->saturating_p) |
819fec00 | 10390 | { |
0b2c4be5 DS |
10391 | error_at (specs->locations[cdw_saturating], |
10392 | "%<_Sat%> is used without %<_Fract%> or %<_Accum%>"); | |
754ccf7c | 10393 | if (!targetm.fixed_point_supported_p ()) |
0b2c4be5 DS |
10394 | error_at (specs->locations[cdw_saturating], |
10395 | "fixed-point types not supported for this target"); | |
819fec00 NS |
10396 | specs->typespec_word = cts_fract; |
10397 | } | |
10398 | else if (specs->long_p || specs->short_p | |
10399 | || specs->signed_p || specs->unsigned_p) | |
98c3a782 JM |
10400 | { |
10401 | specs->typespec_word = cts_int; | |
10402 | } | |
10403 | else if (specs->complex_p) | |
10404 | { | |
10405 | specs->typespec_word = cts_double; | |
0b2c4be5 | 10406 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 MLI |
10407 | "ISO C does not support plain %<complex%> meaning " |
10408 | "%<double complex%>"); | |
98c3a782 JM |
10409 | } |
10410 | else | |
10411 | { | |
10412 | specs->typespec_word = cts_int; | |
10413 | specs->default_int_p = true; | |
10414 | /* We don't diagnose this here because grokdeclarator will | |
10415 | give more specific diagnostics according to whether it is | |
10416 | a function definition. */ | |
10417 | } | |
10418 | } | |
10419 | ||
10420 | /* If "signed" was specified, record this to distinguish "int" and | |
10421 | "signed int" in the case of a bit-field with | |
10422 | -funsigned-bitfields. */ | |
10423 | specs->explicit_signed_p = specs->signed_p; | |
10424 | ||
10425 | /* Now compute the actual type. */ | |
10426 | switch (specs->typespec_word) | |
10427 | { | |
38b7bc7f JM |
10428 | case cts_auto_type: |
10429 | gcc_assert (!specs->long_p && !specs->short_p | |
10430 | && !specs->signed_p && !specs->unsigned_p | |
10431 | && !specs->complex_p); | |
10432 | /* Type to be filled in later. */ | |
10433 | break; | |
98c3a782 JM |
10434 | case cts_void: |
10435 | gcc_assert (!specs->long_p && !specs->short_p | |
10436 | && !specs->signed_p && !specs->unsigned_p | |
10437 | && !specs->complex_p); | |
10438 | specs->type = void_type_node; | |
10439 | break; | |
10440 | case cts_bool: | |
10441 | gcc_assert (!specs->long_p && !specs->short_p | |
10442 | && !specs->signed_p && !specs->unsigned_p | |
10443 | && !specs->complex_p); | |
10444 | specs->type = boolean_type_node; | |
10445 | break; | |
10446 | case cts_char: | |
10447 | gcc_assert (!specs->long_p && !specs->short_p); | |
10448 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
10449 | if (specs->signed_p) | |
10450 | specs->type = signed_char_type_node; | |
10451 | else if (specs->unsigned_p) | |
10452 | specs->type = unsigned_char_type_node; | |
10453 | else | |
10454 | specs->type = char_type_node; | |
10455 | if (specs->complex_p) | |
10456 | { | |
0b2c4be5 | 10457 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 | 10458 | "ISO C does not support complex integer types"); |
98c3a782 JM |
10459 | specs->type = build_complex_type (specs->type); |
10460 | } | |
10461 | break; | |
78a7c317 | 10462 | case cts_int_n: |
a6766312 KT |
10463 | gcc_assert (!specs->long_p && !specs->short_p && !specs->long_long_p); |
10464 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
10465 | specs->type = (specs->unsigned_p | |
78a7c317 DD |
10466 | ? int_n_trees[specs->int_n_idx].unsigned_type |
10467 | : int_n_trees[specs->int_n_idx].signed_type); | |
a6766312 KT |
10468 | if (specs->complex_p) |
10469 | { | |
0b2c4be5 | 10470 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
a6766312 KT |
10471 | "ISO C does not support complex integer types"); |
10472 | specs->type = build_complex_type (specs->type); | |
10473 | } | |
10474 | break; | |
98c3a782 JM |
10475 | case cts_int: |
10476 | gcc_assert (!(specs->long_p && specs->short_p)); | |
10477 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
10478 | if (specs->long_long_p) | |
10479 | specs->type = (specs->unsigned_p | |
10480 | ? long_long_unsigned_type_node | |
10481 | : long_long_integer_type_node); | |
10482 | else if (specs->long_p) | |
10483 | specs->type = (specs->unsigned_p | |
10484 | ? long_unsigned_type_node | |
10485 | : long_integer_type_node); | |
10486 | else if (specs->short_p) | |
10487 | specs->type = (specs->unsigned_p | |
10488 | ? short_unsigned_type_node | |
10489 | : short_integer_type_node); | |
10490 | else | |
10491 | specs->type = (specs->unsigned_p | |
10492 | ? unsigned_type_node | |
10493 | : integer_type_node); | |
10494 | if (specs->complex_p) | |
10495 | { | |
0b2c4be5 | 10496 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 | 10497 | "ISO C does not support complex integer types"); |
98c3a782 JM |
10498 | specs->type = build_complex_type (specs->type); |
10499 | } | |
10500 | break; | |
10501 | case cts_float: | |
10502 | gcc_assert (!specs->long_p && !specs->short_p | |
10503 | && !specs->signed_p && !specs->unsigned_p); | |
10504 | specs->type = (specs->complex_p | |
10505 | ? complex_float_type_node | |
10506 | : float_type_node); | |
10507 | break; | |
10508 | case cts_double: | |
10509 | gcc_assert (!specs->long_long_p && !specs->short_p | |
10510 | && !specs->signed_p && !specs->unsigned_p); | |
10511 | if (specs->long_p) | |
10512 | { | |
10513 | specs->type = (specs->complex_p | |
10514 | ? complex_long_double_type_node | |
10515 | : long_double_type_node); | |
10516 | } | |
10517 | else | |
10518 | { | |
10519 | specs->type = (specs->complex_p | |
10520 | ? complex_double_type_node | |
10521 | : double_type_node); | |
10522 | } | |
10523 | break; | |
9a8ce21f JG |
10524 | case cts_dfloat32: |
10525 | case cts_dfloat64: | |
10526 | case cts_dfloat128: | |
10527 | gcc_assert (!specs->long_p && !specs->long_long_p && !specs->short_p | |
10528 | && !specs->signed_p && !specs->unsigned_p && !specs->complex_p); | |
10529 | if (specs->typespec_word == cts_dfloat32) | |
10530 | specs->type = dfloat32_type_node; | |
10531 | else if (specs->typespec_word == cts_dfloat64) | |
10532 | specs->type = dfloat64_type_node; | |
10533 | else | |
10534 | specs->type = dfloat128_type_node; | |
10535 | break; | |
ab22c1fa | 10536 | case cts_fract: |
754ccf7c JJ |
10537 | gcc_assert (!specs->complex_p); |
10538 | if (!targetm.fixed_point_supported_p ()) | |
10539 | specs->type = integer_type_node; | |
10540 | else if (specs->saturating_p) | |
ab22c1fa CF |
10541 | { |
10542 | if (specs->long_long_p) | |
10543 | specs->type = specs->unsigned_p | |
10544 | ? sat_unsigned_long_long_fract_type_node | |
10545 | : sat_long_long_fract_type_node; | |
10546 | else if (specs->long_p) | |
10547 | specs->type = specs->unsigned_p | |
10548 | ? sat_unsigned_long_fract_type_node | |
10549 | : sat_long_fract_type_node; | |
10550 | else if (specs->short_p) | |
10551 | specs->type = specs->unsigned_p | |
10552 | ? sat_unsigned_short_fract_type_node | |
10553 | : sat_short_fract_type_node; | |
10554 | else | |
10555 | specs->type = specs->unsigned_p | |
10556 | ? sat_unsigned_fract_type_node | |
10557 | : sat_fract_type_node; | |
754ccf7c | 10558 | } |
ab22c1fa CF |
10559 | else |
10560 | { | |
10561 | if (specs->long_long_p) | |
10562 | specs->type = specs->unsigned_p | |
10563 | ? unsigned_long_long_fract_type_node | |
10564 | : long_long_fract_type_node; | |
10565 | else if (specs->long_p) | |
10566 | specs->type = specs->unsigned_p | |
10567 | ? unsigned_long_fract_type_node | |
10568 | : long_fract_type_node; | |
10569 | else if (specs->short_p) | |
10570 | specs->type = specs->unsigned_p | |
10571 | ? unsigned_short_fract_type_node | |
10572 | : short_fract_type_node; | |
10573 | else | |
10574 | specs->type = specs->unsigned_p | |
10575 | ? unsigned_fract_type_node | |
10576 | : fract_type_node; | |
754ccf7c | 10577 | } |
ab22c1fa CF |
10578 | break; |
10579 | case cts_accum: | |
754ccf7c JJ |
10580 | gcc_assert (!specs->complex_p); |
10581 | if (!targetm.fixed_point_supported_p ()) | |
10582 | specs->type = integer_type_node; | |
10583 | else if (specs->saturating_p) | |
ab22c1fa CF |
10584 | { |
10585 | if (specs->long_long_p) | |
10586 | specs->type = specs->unsigned_p | |
10587 | ? sat_unsigned_long_long_accum_type_node | |
10588 | : sat_long_long_accum_type_node; | |
10589 | else if (specs->long_p) | |
10590 | specs->type = specs->unsigned_p | |
10591 | ? sat_unsigned_long_accum_type_node | |
10592 | : sat_long_accum_type_node; | |
10593 | else if (specs->short_p) | |
10594 | specs->type = specs->unsigned_p | |
10595 | ? sat_unsigned_short_accum_type_node | |
10596 | : sat_short_accum_type_node; | |
10597 | else | |
10598 | specs->type = specs->unsigned_p | |
10599 | ? sat_unsigned_accum_type_node | |
10600 | : sat_accum_type_node; | |
754ccf7c | 10601 | } |
ab22c1fa CF |
10602 | else |
10603 | { | |
10604 | if (specs->long_long_p) | |
10605 | specs->type = specs->unsigned_p | |
10606 | ? unsigned_long_long_accum_type_node | |
10607 | : long_long_accum_type_node; | |
10608 | else if (specs->long_p) | |
10609 | specs->type = specs->unsigned_p | |
10610 | ? unsigned_long_accum_type_node | |
10611 | : long_accum_type_node; | |
10612 | else if (specs->short_p) | |
10613 | specs->type = specs->unsigned_p | |
10614 | ? unsigned_short_accum_type_node | |
10615 | : short_accum_type_node; | |
10616 | else | |
10617 | specs->type = specs->unsigned_p | |
10618 | ? unsigned_accum_type_node | |
10619 | : accum_type_node; | |
754ccf7c | 10620 | } |
ab22c1fa | 10621 | break; |
98c3a782 JM |
10622 | default: |
10623 | gcc_unreachable (); | |
10624 | } | |
10625 | ||
10626 | return specs; | |
10627 | } | |
10628 | ||
db5f8b93 RH |
10629 | /* A subroutine of c_write_global_declarations. Perform final processing |
10630 | on one file scope's declarations (or the external scope's declarations), | |
10631 | GLOBALS. */ | |
10632 | ||
f75fbaf7 ZW |
10633 | static void |
10634 | c_write_global_declarations_1 (tree globals) | |
d1bd0ded | 10635 | { |
d1bd0ded | 10636 | tree decl; |
df4b9cfe | 10637 | bool reconsider; |
118a3a8b | 10638 | |
f75fbaf7 | 10639 | /* Process the decls in the order they were written. */ |
910ad8de | 10640 | for (decl = globals; decl; decl = DECL_CHAIN (decl)) |
bc4b653b | 10641 | { |
bc4b653b JM |
10642 | /* Check for used but undefined static functions using the C |
10643 | standard's definition of "used", and set TREE_NO_WARNING so | |
10644 | that check_global_declarations doesn't repeat the check. */ | |
10645 | if (TREE_CODE (decl) == FUNCTION_DECL | |
10646 | && DECL_INITIAL (decl) == 0 | |
10647 | && DECL_EXTERNAL (decl) | |
10648 | && !TREE_PUBLIC (decl) | |
10649 | && C_DECL_USED (decl)) | |
10650 | { | |
509c9d60 | 10651 | pedwarn (input_location, 0, "%q+F used but never defined", decl); |
bc4b653b JM |
10652 | TREE_NO_WARNING (decl) = 1; |
10653 | } | |
db5f8b93 RH |
10654 | |
10655 | wrapup_global_declaration_1 (decl); | |
bc4b653b | 10656 | } |
df4b9cfe JJ |
10657 | |
10658 | do | |
10659 | { | |
10660 | reconsider = false; | |
910ad8de | 10661 | for (decl = globals; decl; decl = DECL_CHAIN (decl)) |
df4b9cfe JJ |
10662 | reconsider |= wrapup_global_declaration_2 (decl); |
10663 | } | |
10664 | while (reconsider); | |
10665 | ||
910ad8de | 10666 | for (decl = globals; decl; decl = DECL_CHAIN (decl)) |
9de41e57 | 10667 | check_global_declaration_1 (decl); |
db5f8b93 | 10668 | } |
d1bd0ded | 10669 | |
db5f8b93 RH |
10670 | /* A subroutine of c_write_global_declarations Emit debug information for each |
10671 | of the declarations in GLOBALS. */ | |
118a3a8b | 10672 | |
db5f8b93 RH |
10673 | static void |
10674 | c_write_global_declarations_2 (tree globals) | |
10675 | { | |
10676 | tree decl; | |
10677 | ||
910ad8de | 10678 | for (decl = globals; decl ; decl = DECL_CHAIN (decl)) |
9de41e57 | 10679 | debug_hooks->global_decl (decl); |
d1bd0ded GK |
10680 | } |
10681 | ||
9cc54940 AC |
10682 | /* Callback to collect a source_ref from a DECL. */ |
10683 | ||
10684 | static void | |
10685 | collect_source_ref_cb (tree decl) | |
10686 | { | |
10687 | if (!DECL_IS_BUILTIN (decl)) | |
10688 | collect_source_ref (LOCATION_FILE (decl_sloc (decl, false))); | |
10689 | } | |
10690 | ||
86d71fca AC |
10691 | /* Preserve the external declarations scope across a garbage collect. */ |
10692 | static GTY(()) tree ext_block; | |
10693 | ||
9cc54940 AC |
10694 | /* Collect all references relevant to SOURCE_FILE. */ |
10695 | ||
10696 | static void | |
10697 | collect_all_refs (const char *source_file) | |
10698 | { | |
10699 | tree t; | |
6be14c0e | 10700 | unsigned i; |
9cc54940 | 10701 | |
9771b263 | 10702 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
9cc54940 | 10703 | collect_ada_nodes (BLOCK_VARS (DECL_INITIAL (t)), source_file); |
86d71fca AC |
10704 | |
10705 | collect_ada_nodes (BLOCK_VARS (ext_block), source_file); | |
9cc54940 AC |
10706 | } |
10707 | ||
10708 | /* Iterate over all global declarations and call CALLBACK. */ | |
10709 | ||
10710 | static void | |
10711 | for_each_global_decl (void (*callback) (tree decl)) | |
10712 | { | |
10713 | tree t; | |
10714 | tree decls; | |
10715 | tree decl; | |
6be14c0e | 10716 | unsigned i; |
9cc54940 | 10717 | |
9771b263 | 10718 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
9cc54940 AC |
10719 | { |
10720 | decls = DECL_INITIAL (t); | |
10721 | for (decl = BLOCK_VARS (decls); decl; decl = TREE_CHAIN (decl)) | |
10722 | callback (decl); | |
10723 | } | |
9cc54940 | 10724 | |
86d71fca AC |
10725 | for (decl = BLOCK_VARS (ext_block); decl; decl = TREE_CHAIN (decl)) |
10726 | callback (decl); | |
10727 | } | |
db5f8b93 | 10728 | |
d1bd0ded | 10729 | void |
f75fbaf7 | 10730 | c_write_global_declarations (void) |
d1bd0ded | 10731 | { |
db5f8b93 | 10732 | tree t; |
6be14c0e | 10733 | unsigned i; |
e13e48e7 | 10734 | |
f75fbaf7 ZW |
10735 | /* We don't want to do this if generating a PCH. */ |
10736 | if (pch_file) | |
10737 | return; | |
d1bd0ded | 10738 | |
575bfb00 LC |
10739 | timevar_start (TV_PHASE_DEFERRED); |
10740 | ||
977e30bc NP |
10741 | /* Do the Objective-C stuff. This is where all the Objective-C |
10742 | module stuff gets generated (symtab, class/protocol/selector | |
10743 | lists etc). */ | |
10744 | if (c_dialect_objc ()) | |
10745 | objc_write_global_declarations (); | |
10746 | ||
36c1b0de ZW |
10747 | /* Close the external scope. */ |
10748 | ext_block = pop_scope (); | |
10749 | external_scope = 0; | |
366de0ce | 10750 | gcc_assert (!current_scope); |
36c1b0de | 10751 | |
9cc54940 | 10752 | /* Handle -fdump-ada-spec[-slim]. */ |
3b78de56 | 10753 | if (flag_dump_ada_spec || flag_dump_ada_spec_slim) |
9cc54940 AC |
10754 | { |
10755 | /* Build a table of files to generate specs for */ | |
3b78de56 | 10756 | if (flag_dump_ada_spec_slim) |
9cc54940 AC |
10757 | collect_source_ref (main_input_filename); |
10758 | else | |
10759 | for_each_global_decl (collect_source_ref_cb); | |
10760 | ||
10761 | dump_ada_specs (collect_all_refs, NULL); | |
10762 | } | |
10763 | ||
7f3b2bda GDR |
10764 | if (ext_block) |
10765 | { | |
10766 | tree tmp = BLOCK_VARS (ext_block); | |
10767 | int flags; | |
10768 | FILE * stream = dump_begin (TDI_tu, &flags); | |
10769 | if (stream && tmp) | |
c22cacf3 MS |
10770 | { |
10771 | dump_node (tmp, flags & ~TDF_SLIM, stream); | |
10772 | dump_end (TDI_tu, stream); | |
10773 | } | |
7f3b2bda | 10774 | } |
db5f8b93 RH |
10775 | |
10776 | /* Process all file scopes in this compilation, and the external_scope, | |
10777 | through wrapup_global_declarations and check_global_declarations. */ | |
9771b263 | 10778 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
db5f8b93 | 10779 | c_write_global_declarations_1 (BLOCK_VARS (DECL_INITIAL (t))); |
36c1b0de ZW |
10780 | c_write_global_declarations_1 (BLOCK_VARS (ext_block)); |
10781 | ||
575bfb00 | 10782 | timevar_stop (TV_PHASE_DEFERRED); |
a910399d | 10783 | timevar_start (TV_PHASE_OPT_GEN); |
575bfb00 | 10784 | |
36c1b0de ZW |
10785 | /* We're done parsing; proceed to optimize and emit assembly. |
10786 | FIXME: shouldn't be the front end's responsibility to call this. */ | |
3dafb85c | 10787 | symtab->finalize_compilation_unit (); |
db5f8b93 | 10788 | |
a910399d | 10789 | timevar_stop (TV_PHASE_OPT_GEN); |
575bfb00 LC |
10790 | timevar_start (TV_PHASE_DBGINFO); |
10791 | ||
db5f8b93 RH |
10792 | /* After cgraph has had a chance to emit everything that's going to |
10793 | be emitted, output debug information for globals. */ | |
1da2ed5f | 10794 | if (!seen_error ()) |
db5f8b93 RH |
10795 | { |
10796 | timevar_push (TV_SYMOUT); | |
9771b263 | 10797 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
db5f8b93 RH |
10798 | c_write_global_declarations_2 (BLOCK_VARS (DECL_INITIAL (t))); |
10799 | c_write_global_declarations_2 (BLOCK_VARS (ext_block)); | |
10800 | timevar_pop (TV_SYMOUT); | |
10801 | } | |
10802 | ||
10803 | ext_block = NULL; | |
575bfb00 | 10804 | timevar_stop (TV_PHASE_DBGINFO); |
d1bd0ded GK |
10805 | } |
10806 | ||
bffad7f1 SB |
10807 | /* Register reserved keyword WORD as qualifier for address space AS. */ |
10808 | ||
10809 | void | |
10810 | c_register_addr_space (const char *word, addr_space_t as) | |
10811 | { | |
10812 | int rid = RID_FIRST_ADDR_SPACE + as; | |
10813 | tree id; | |
10814 | ||
10815 | /* Address space qualifiers are only supported | |
10816 | in C with GNU extensions enabled. */ | |
10817 | if (c_dialect_objc () || flag_no_asm) | |
10818 | return; | |
10819 | ||
10820 | id = get_identifier (word); | |
10821 | C_SET_RID_CODE (id, rid); | |
10822 | C_IS_RESERVED_WORD (id) = 1; | |
10823 | ridpointers [rid] = id; | |
10824 | } | |
10825 | ||
acf0174b JJ |
10826 | /* Return identifier to look up for omp declare reduction. */ |
10827 | ||
10828 | tree | |
10829 | c_omp_reduction_id (enum tree_code reduction_code, tree reduction_id) | |
10830 | { | |
10831 | const char *p = NULL; | |
10832 | switch (reduction_code) | |
10833 | { | |
10834 | case PLUS_EXPR: p = "+"; break; | |
10835 | case MULT_EXPR: p = "*"; break; | |
10836 | case MINUS_EXPR: p = "-"; break; | |
10837 | case BIT_AND_EXPR: p = "&"; break; | |
10838 | case BIT_XOR_EXPR: p = "^"; break; | |
10839 | case BIT_IOR_EXPR: p = "|"; break; | |
10840 | case TRUTH_ANDIF_EXPR: p = "&&"; break; | |
10841 | case TRUTH_ORIF_EXPR: p = "||"; break; | |
10842 | case MIN_EXPR: p = "min"; break; | |
10843 | case MAX_EXPR: p = "max"; break; | |
10844 | default: | |
10845 | break; | |
10846 | } | |
10847 | ||
10848 | if (p == NULL) | |
10849 | { | |
10850 | if (TREE_CODE (reduction_id) != IDENTIFIER_NODE) | |
10851 | return error_mark_node; | |
10852 | p = IDENTIFIER_POINTER (reduction_id); | |
10853 | } | |
10854 | ||
10855 | const char prefix[] = "omp declare reduction "; | |
10856 | size_t lenp = sizeof (prefix); | |
10857 | size_t len = strlen (p); | |
10858 | char *name = XALLOCAVEC (char, lenp + len); | |
10859 | memcpy (name, prefix, lenp - 1); | |
10860 | memcpy (name + lenp - 1, p, len + 1); | |
10861 | return get_identifier (name); | |
10862 | } | |
10863 | ||
10864 | /* Lookup REDUCTION_ID in the current scope, or create an artificial | |
10865 | VAR_DECL, bind it into the current scope and return it. */ | |
10866 | ||
10867 | tree | |
10868 | c_omp_reduction_decl (tree reduction_id) | |
10869 | { | |
10870 | struct c_binding *b = I_SYMBOL_BINDING (reduction_id); | |
10871 | if (b != NULL && B_IN_CURRENT_SCOPE (b)) | |
10872 | return b->decl; | |
10873 | ||
10874 | tree decl = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
10875 | reduction_id, integer_type_node); | |
10876 | DECL_ARTIFICIAL (decl) = 1; | |
10877 | DECL_EXTERNAL (decl) = 1; | |
10878 | TREE_STATIC (decl) = 1; | |
10879 | TREE_PUBLIC (decl) = 0; | |
10880 | bind (reduction_id, decl, current_scope, true, false, BUILTINS_LOCATION); | |
10881 | return decl; | |
10882 | } | |
10883 | ||
10884 | /* Lookup REDUCTION_ID in the first scope where it has entry for TYPE. */ | |
10885 | ||
10886 | tree | |
10887 | c_omp_reduction_lookup (tree reduction_id, tree type) | |
10888 | { | |
10889 | struct c_binding *b = I_SYMBOL_BINDING (reduction_id); | |
10890 | while (b) | |
10891 | { | |
10892 | tree t; | |
10893 | for (t = DECL_INITIAL (b->decl); t; t = TREE_CHAIN (t)) | |
10894 | if (comptypes (TREE_PURPOSE (t), type)) | |
10895 | return TREE_VALUE (t); | |
10896 | b = b->shadowed; | |
10897 | } | |
10898 | return error_mark_node; | |
10899 | } | |
10900 | ||
10901 | /* Helper function called via walk_tree, to diagnose invalid | |
10902 | #pragma omp declare reduction combiners or initializers. */ | |
10903 | ||
10904 | tree | |
10905 | c_check_omp_declare_reduction_r (tree *tp, int *, void *data) | |
10906 | { | |
10907 | tree *vars = (tree *) data; | |
10908 | if (SSA_VAR_P (*tp) | |
10909 | && !DECL_ARTIFICIAL (*tp) | |
10910 | && *tp != vars[0] | |
10911 | && *tp != vars[1]) | |
10912 | { | |
10913 | location_t loc = DECL_SOURCE_LOCATION (vars[0]); | |
10914 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (vars[0])), "omp_out") == 0) | |
10915 | error_at (loc, "%<#pragma omp declare reduction%> combiner refers to " | |
10916 | "variable %qD which is not %<omp_out%> nor %<omp_in%>", | |
10917 | *tp); | |
10918 | else | |
10919 | error_at (loc, "%<#pragma omp declare reduction%> initializer refers " | |
10920 | "to variable %qD which is not %<omp_priv%> nor " | |
10921 | "%<omp_orig%>", | |
10922 | *tp); | |
10923 | return *tp; | |
10924 | } | |
10925 | return NULL_TREE; | |
10926 | } | |
10927 | ||
d4a10d0a | 10928 | #include "gt-c-c-decl.h" |