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51e29401 | 1 | /* Process declarations and variables for C compiler. |
a5544970 | 2 | Copyright (C) 1988-2019 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" | |
6c7a259b | 28 | #define INCLUDE_UNIQUE_PTR |
670ee920 | 29 | #include "system.h" |
4977bab6 | 30 | #include "coretypes.h" |
2adfab87 AM |
31 | #include "target.h" |
32 | #include "function.h" | |
2adfab87 AM |
33 | #include "c-tree.h" |
34 | #include "timevar.h" | |
2adfab87 AM |
35 | #include "stringpool.h" |
36 | #include "cgraph.h" | |
37 | #include "intl.h" | |
d8a2d370 DN |
38 | #include "print-tree.h" |
39 | #include "stor-layout.h" | |
40 | #include "varasm.h" | |
41 | #include "attribs.h" | |
5f6da302 | 42 | #include "toplev.h" |
e1772ac0 | 43 | #include "debug.h" |
61d3ce20 | 44 | #include "c-family/c-objc.h" |
39dabefd | 45 | #include "c-family/c-pragma.h" |
b906f4ca | 46 | #include "c-family/c-ubsan.h" |
29cc57cf | 47 | #include "c-lang.h" |
6de9cd9a | 48 | #include "langhooks.h" |
726a989a | 49 | #include "tree-iterator.h" |
7ee2468b | 50 | #include "dumpfile.h" |
68a607d8 | 51 | #include "plugin.h" |
39dabefd | 52 | #include "c-family/c-ada-spec.h" |
9b2b7279 | 53 | #include "builtins.h" |
1a4f11c8 DM |
54 | #include "spellcheck-tree.h" |
55 | #include "gcc-rich-location.h" | |
45b2222a | 56 | #include "asan.h" |
6c7a259b | 57 | #include "c-family/name-hint.h" |
26edace6 | 58 | #include "c-family/known-headers.h" |
613bc14f | 59 | #include "c-family/c-spellcheck.h" |
a0d85b75 | 60 | |
51e29401 RS |
61 | /* In grokdeclarator, distinguish syntactic contexts of declarators. */ |
62 | enum decl_context | |
63 | { NORMAL, /* Ordinary declaration */ | |
64 | FUNCDEF, /* Function definition */ | |
65 | PARM, /* Declaration of parm before function body */ | |
66 | FIELD, /* Declaration inside struct or union */ | |
51e29401 RS |
67 | TYPENAME}; /* Typename (inside cast or sizeof) */ |
68 | ||
0da300cd TT |
69 | /* States indicating how grokdeclarator() should handle declspecs marked |
70 | with __attribute__((deprecated)). An object declared as | |
71 | __attribute__((deprecated)) suppresses warnings of uses of other | |
72 | deprecated items. */ | |
73 | ||
74 | enum deprecated_states { | |
75 | DEPRECATED_NORMAL, | |
76 | DEPRECATED_SUPPRESS | |
77 | }; | |
78 | ||
51e29401 | 79 | \f |
51e29401 RS |
80 | /* Nonzero if we have seen an invalid cross reference |
81 | to a struct, union, or enum, but not yet printed the message. */ | |
51e29401 | 82 | tree pending_invalid_xref; |
093c7153 | 83 | |
51e29401 | 84 | /* File and line to appear in the eventual error message. */ |
070588f0 | 85 | location_t pending_invalid_xref_location; |
51e29401 | 86 | |
77dbdb57 ZW |
87 | /* The file and line that the prototype came from if this is an |
88 | old-style definition; used for diagnostics in | |
89 | store_parm_decls_oldstyle. */ | |
eb1dfbb2 | 90 | |
95035b6f | 91 | static location_t current_function_prototype_locus; |
50a9145c | 92 | |
6fb58bba JM |
93 | /* Whether this prototype was built-in. */ |
94 | ||
95 | static bool current_function_prototype_built_in; | |
96 | ||
97 | /* The argument type information of this prototype. */ | |
98 | ||
99 | static tree current_function_prototype_arg_types; | |
100 | ||
7b112487 JM |
101 | /* The argument information structure for the function currently being |
102 | defined. */ | |
103 | ||
f8893e47 | 104 | static struct c_arg_info *current_function_arg_info; |
7b112487 | 105 | |
bc4b653b JM |
106 | /* The obstack on which parser and related data structures, which are |
107 | not live beyond their top-level declaration or definition, are | |
108 | allocated. */ | |
109 | struct obstack parser_obstack; | |
110 | ||
8f17b5c5 MM |
111 | /* The current statement tree. */ |
112 | ||
e2500fed | 113 | static GTY(()) struct stmt_tree_s c_stmt_tree; |
8f17b5c5 | 114 | |
6614fd40 | 115 | /* State saving variables. */ |
506e2710 RH |
116 | tree c_break_label; |
117 | tree c_cont_label; | |
e13e48e7 | 118 | |
f75fbaf7 ZW |
119 | /* A list of decls to be made automatically visible in each file scope. */ |
120 | static GTY(()) tree visible_builtins; | |
121 | ||
51e29401 RS |
122 | /* Set to 0 at beginning of a function definition, set to 1 if |
123 | a return statement that specifies a return value is seen. */ | |
124 | ||
125 | int current_function_returns_value; | |
126 | ||
127 | /* Set to 0 at beginning of a function definition, set to 1 if | |
128 | a return statement with no argument is seen. */ | |
129 | ||
130 | int current_function_returns_null; | |
131 | ||
5ce89b2e JM |
132 | /* Set to 0 at beginning of a function definition, set to 1 if |
133 | a call to a noreturn function is seen. */ | |
134 | ||
135 | int current_function_returns_abnormally; | |
136 | ||
51e29401 RS |
137 | /* Set to nonzero by `grokdeclarator' for a function |
138 | whose return type is defaulted, if warnings for this are desired. */ | |
139 | ||
140 | static int warn_about_return_type; | |
141 | ||
73aea290 JM |
142 | /* Nonzero when the current toplevel function contains a declaration |
143 | of a nested function which is never defined. */ | |
144 | ||
145 | static bool undef_nested_function; | |
146 | ||
acf0174b JJ |
147 | /* If non-zero, implicit "omp declare target" attribute is added into the |
148 | attribute lists. */ | |
149 | int current_omp_declare_target_attribute; | |
51e29401 | 150 | \f |
f75fbaf7 ZW |
151 | /* Each c_binding structure describes one binding of an identifier to |
152 | a decl. All the decls in a scope - irrespective of namespace - are | |
153 | chained together by the ->prev field, which (as the name implies) | |
154 | runs in reverse order. All the decls in a given namespace bound to | |
155 | a given identifier are chained by the ->shadowed field, which runs | |
9aaabf8a | 156 | from inner to outer scopes. |
f75fbaf7 ZW |
157 | |
158 | The ->decl field usually points to a DECL node, but there are two | |
159 | exceptions. In the namespace of type tags, the bound entity is a | |
160 | RECORD_TYPE, UNION_TYPE, or ENUMERAL_TYPE node. If an undeclared | |
161 | identifier is encountered, it is bound to error_mark_node to | |
162 | suppress further errors about that identifier in the current | |
9aaabf8a ZW |
163 | function. |
164 | ||
e1b7793c | 165 | The ->u.type field stores the type of the declaration in this scope; |
0b410f0b JM |
166 | if NULL, the type is the type of the ->decl field. This is only of |
167 | relevance for objects with external or internal linkage which may | |
168 | be redeclared in inner scopes, forming composite types that only | |
169 | persist for the duration of those scopes. In the external scope, | |
170 | this stores the composite of all the types declared for this | |
171 | object, visible or not. The ->inner_comp field (used only at file | |
172 | scope) stores whether an incomplete array type at file scope was | |
173 | completed at an inner scope to an array size other than 1. | |
174 | ||
e1b7793c ILT |
175 | The ->u.label field is used for labels. It points to a structure |
176 | which stores additional information used for warnings. | |
177 | ||
9aaabf8a ZW |
178 | The depth field is copied from the scope structure that holds this |
179 | decl. It is used to preserve the proper ordering of the ->shadowed | |
180 | field (see bind()) and also for a handful of special-case checks. | |
181 | Finally, the invisible bit is true for a decl which should be | |
182 | ignored for purposes of normal name lookup, and the nested bit is | |
183 | true for a decl that's been bound a second time in an inner scope; | |
184 | in all such cases, the binding in the outer scope will have its | |
185 | invisible bit true. */ | |
f75fbaf7 | 186 | |
d1b38208 | 187 | struct GTY((chain_next ("%h.prev"))) c_binding { |
e1b7793c ILT |
188 | union GTY(()) { /* first so GTY desc can use decl */ |
189 | tree GTY((tag ("0"))) type; /* the type in this scope */ | |
190 | struct c_label_vars * GTY((tag ("1"))) label; /* for warnings */ | |
191 | } GTY((desc ("TREE_CODE (%0.decl) == LABEL_DECL"))) u; | |
f75fbaf7 ZW |
192 | tree decl; /* the decl bound */ |
193 | tree id; /* the identifier it's bound to */ | |
194 | struct c_binding *prev; /* the previous decl in this scope */ | |
195 | struct c_binding *shadowed; /* the innermost decl shadowed by this one */ | |
9aaabf8a ZW |
196 | unsigned int depth : 28; /* depth of this scope */ |
197 | BOOL_BITFIELD invisible : 1; /* normal lookup should ignore this binding */ | |
198 | BOOL_BITFIELD nested : 1; /* do not set DECL_CONTEXT when popping */ | |
0b410f0b | 199 | BOOL_BITFIELD inner_comp : 1; /* incomplete array completed in inner scope */ |
dc491a25 | 200 | BOOL_BITFIELD in_struct : 1; /* currently defined as struct field */ |
b3f27c15 | 201 | location_t locus; /* location for nested bindings */ |
f75fbaf7 | 202 | }; |
9aaabf8a ZW |
203 | #define B_IN_SCOPE(b1, b2) ((b1)->depth == (b2)->depth) |
204 | #define B_IN_CURRENT_SCOPE(b) ((b)->depth == current_scope->depth) | |
205 | #define B_IN_FILE_SCOPE(b) ((b)->depth == 1 /*file_scope->depth*/) | |
206 | #define B_IN_EXTERNAL_SCOPE(b) ((b)->depth == 0 /*external_scope->depth*/) | |
f75fbaf7 | 207 | |
18d5f982 ZW |
208 | /* Each C symbol points to three linked lists of c_binding structures. |
209 | These describe the values of the identifier in the three different | |
210 | namespaces defined by the language. */ | |
211 | ||
d1b38208 | 212 | struct GTY(()) lang_identifier { |
18d5f982 ZW |
213 | struct c_common_identifier common_id; |
214 | struct c_binding *symbol_binding; /* vars, funcs, constants, typedefs */ | |
215 | struct c_binding *tag_binding; /* struct/union/enum tags */ | |
216 | struct c_binding *label_binding; /* labels */ | |
217 | }; | |
218 | ||
219 | /* Validate c-lang.c's assumptions. */ | |
220 | extern char C_SIZEOF_STRUCT_LANG_IDENTIFIER_isnt_accurate | |
221 | [(sizeof(struct lang_identifier) == C_SIZEOF_STRUCT_LANG_IDENTIFIER) ? 1 : -1]; | |
222 | ||
ddc8de03 PM |
223 | /* The binding oracle; see c-tree.h. */ |
224 | void (*c_binding_oracle) (enum c_oracle_request, tree identifier); | |
225 | ||
226 | /* This flag is set on an identifier if we have previously asked the | |
227 | binding oracle for this identifier's symbol binding. */ | |
228 | #define I_SYMBOL_CHECKED(node) \ | |
229 | (TREE_LANG_FLAG_4 (IDENTIFIER_NODE_CHECK (node))) | |
230 | ||
231 | static inline struct c_binding* * | |
232 | i_symbol_binding (tree node) | |
233 | { | |
234 | struct lang_identifier *lid | |
235 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
236 | ||
237 | if (lid->symbol_binding == NULL | |
238 | && c_binding_oracle != NULL | |
239 | && !I_SYMBOL_CHECKED (node)) | |
240 | { | |
241 | /* Set the "checked" flag first, to avoid infinite recursion | |
242 | when the binding oracle calls back into gcc. */ | |
243 | I_SYMBOL_CHECKED (node) = 1; | |
244 | c_binding_oracle (C_ORACLE_SYMBOL, node); | |
245 | } | |
246 | ||
247 | return &lid->symbol_binding; | |
248 | } | |
249 | ||
250 | #define I_SYMBOL_BINDING(node) (*i_symbol_binding (node)) | |
251 | ||
252 | #define I_SYMBOL_DECL(node) \ | |
253 | (I_SYMBOL_BINDING(node) ? I_SYMBOL_BINDING(node)->decl : 0) | |
254 | ||
255 | /* This flag is set on an identifier if we have previously asked the | |
256 | binding oracle for this identifier's tag binding. */ | |
257 | #define I_TAG_CHECKED(node) \ | |
258 | (TREE_LANG_FLAG_5 (IDENTIFIER_NODE_CHECK (node))) | |
259 | ||
260 | static inline struct c_binding ** | |
261 | i_tag_binding (tree node) | |
262 | { | |
263 | struct lang_identifier *lid | |
264 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
265 | ||
266 | if (lid->tag_binding == NULL | |
267 | && c_binding_oracle != NULL | |
268 | && !I_TAG_CHECKED (node)) | |
269 | { | |
270 | /* Set the "checked" flag first, to avoid infinite recursion | |
271 | when the binding oracle calls back into gcc. */ | |
272 | I_TAG_CHECKED (node) = 1; | |
273 | c_binding_oracle (C_ORACLE_TAG, node); | |
274 | } | |
275 | ||
276 | return &lid->tag_binding; | |
277 | } | |
278 | ||
279 | #define I_TAG_BINDING(node) (*i_tag_binding (node)) | |
280 | ||
281 | #define I_TAG_DECL(node) \ | |
282 | (I_TAG_BINDING(node) ? I_TAG_BINDING(node)->decl : 0) | |
283 | ||
284 | /* This flag is set on an identifier if we have previously asked the | |
285 | binding oracle for this identifier's label binding. */ | |
286 | #define I_LABEL_CHECKED(node) \ | |
287 | (TREE_LANG_FLAG_6 (IDENTIFIER_NODE_CHECK (node))) | |
288 | ||
289 | static inline struct c_binding ** | |
290 | i_label_binding (tree node) | |
291 | { | |
292 | struct lang_identifier *lid | |
293 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
294 | ||
295 | if (lid->label_binding == NULL | |
296 | && c_binding_oracle != NULL | |
297 | && !I_LABEL_CHECKED (node)) | |
298 | { | |
299 | /* Set the "checked" flag first, to avoid infinite recursion | |
300 | when the binding oracle calls back into gcc. */ | |
301 | I_LABEL_CHECKED (node) = 1; | |
302 | c_binding_oracle (C_ORACLE_LABEL, node); | |
303 | } | |
304 | ||
305 | return &lid->label_binding; | |
306 | } | |
307 | ||
308 | #define I_LABEL_BINDING(node) (*i_label_binding (node)) | |
309 | ||
310 | #define I_LABEL_DECL(node) \ | |
311 | (I_LABEL_BINDING(node) ? I_LABEL_BINDING(node)->decl : 0) | |
312 | ||
18d5f982 ZW |
313 | /* The resulting tree type. */ |
314 | ||
d1b38208 | 315 | union GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"), |
56300785 | 316 | chain_next ("(union lang_tree_node *) c_tree_chain_next (&%h.generic)"))) lang_tree_node |
d1b38208 | 317 | { |
18d5f982 ZW |
318 | union tree_node GTY ((tag ("0"), |
319 | desc ("tree_node_structure (&%h)"))) | |
320 | generic; | |
321 | struct lang_identifier GTY ((tag ("1"))) identifier; | |
322 | }; | |
323 | ||
e1b7793c ILT |
324 | /* Track bindings and other things that matter for goto warnings. For |
325 | efficiency, we do not gather all the decls at the point of | |
326 | definition. Instead, we point into the bindings structure. As | |
327 | scopes are popped, we update these structures and gather the decls | |
328 | that matter at that time. */ | |
329 | ||
330 | struct GTY(()) c_spot_bindings { | |
331 | /* The currently open scope which holds bindings defined when the | |
332 | label was defined or the goto statement was found. */ | |
333 | struct c_scope *scope; | |
334 | /* The bindings in the scope field which were defined at the point | |
335 | of the label or goto. This lets us look at older or newer | |
336 | bindings in the scope, as appropriate. */ | |
337 | struct c_binding *bindings_in_scope; | |
338 | /* The number of statement expressions that have started since this | |
339 | label or goto statement was defined. This is zero if we are at | |
340 | the same statement expression level. It is positive if we are in | |
341 | a statement expression started since this spot. It is negative | |
342 | if this spot was in a statement expression and we have left | |
343 | it. */ | |
344 | int stmt_exprs; | |
345 | /* Whether we started in a statement expression but are no longer in | |
346 | it. This is set to true if stmt_exprs ever goes negative. */ | |
347 | bool left_stmt_expr; | |
348 | }; | |
349 | ||
350 | /* This structure is used to keep track of bindings seen when a goto | |
351 | statement is defined. This is only used if we see the goto | |
352 | statement before we see the label. */ | |
353 | ||
354 | struct GTY(()) c_goto_bindings { | |
355 | /* The location of the goto statement. */ | |
356 | location_t loc; | |
357 | /* The bindings of the goto statement. */ | |
358 | struct c_spot_bindings goto_bindings; | |
359 | }; | |
360 | ||
361 | typedef struct c_goto_bindings *c_goto_bindings_p; | |
e1b7793c ILT |
362 | |
363 | /* The additional information we keep track of for a label binding. | |
364 | These fields are updated as scopes are popped. */ | |
365 | ||
366 | struct GTY(()) c_label_vars { | |
367 | /* The shadowed c_label_vars, when one label shadows another (which | |
368 | can only happen using a __label__ declaration). */ | |
369 | struct c_label_vars *shadowed; | |
370 | /* The bindings when the label was defined. */ | |
371 | struct c_spot_bindings label_bindings; | |
372 | /* A list of decls that we care about: decls about which we should | |
373 | warn if a goto branches to this label from later in the function. | |
374 | Decls are added to this list as scopes are popped. We only add | |
375 | the decls that matter. */ | |
9771b263 | 376 | vec<tree, va_gc> *decls_in_scope; |
e1b7793c ILT |
377 | /* A list of goto statements to this label. This is only used for |
378 | goto statements seen before the label was defined, so that we can | |
379 | issue appropriate warnings for them. */ | |
9771b263 | 380 | vec<c_goto_bindings_p, va_gc> *gotos; |
e1b7793c ILT |
381 | }; |
382 | ||
f75fbaf7 ZW |
383 | /* Each c_scope structure describes the complete contents of one |
384 | scope. Four scopes are distinguished specially: the innermost or | |
385 | current scope, the innermost function scope, the file scope (always | |
386 | the second to outermost) and the outermost or external scope. | |
f91f41b2 ZW |
387 | |
388 | Most declarations are recorded in the current scope. | |
389 | ||
390 | All normal label declarations are recorded in the innermost | |
391 | function scope, as are bindings of undeclared identifiers to | |
392 | error_mark_node. (GCC permits nested functions as an extension, | |
393 | hence the 'innermost' qualifier.) Explicitly declared labels | |
394 | (using the __label__ extension) appear in the current scope. | |
395 | ||
f75fbaf7 | 396 | Being in the file scope (current_scope == file_scope) causes |
f91f41b2 ZW |
397 | special behavior in several places below. Also, under some |
398 | conditions the Objective-C front end records declarations in the | |
f75fbaf7 ZW |
399 | file scope even though that isn't the current scope. |
400 | ||
401 | All declarations with external linkage are recorded in the external | |
402 | scope, even if they aren't visible there; this models the fact that | |
403 | such declarations are visible to the entire program, and (with a | |
404 | bit of cleverness, see pushdecl) allows diagnosis of some violations | |
405 | of C99 6.2.2p7 and 6.2.7p2: | |
406 | ||
407 | If, within the same translation unit, the same identifier appears | |
408 | with both internal and external linkage, the behavior is | |
409 | undefined. | |
f91f41b2 | 410 | |
f75fbaf7 ZW |
411 | All declarations that refer to the same object or function shall |
412 | have compatible type; otherwise, the behavior is undefined. | |
413 | ||
414 | Initially only the built-in declarations, which describe compiler | |
415 | intrinsic functions plus a subset of the standard library, are in | |
416 | this scope. | |
417 | ||
418 | The order of the blocks list matters, and it is frequently appended | |
419 | to. To avoid having to walk all the way to the end of the list on | |
420 | each insertion, or reverse the list later, we maintain a pointer to | |
421 | the last list entry. (FIXME: It should be feasible to use a reversed | |
422 | list here.) | |
423 | ||
424 | The bindings list is strictly in reverse order of declarations; | |
425 | pop_scope relies on this. */ | |
f91f41b2 | 426 | |
51e29401 | 427 | |
d1b38208 | 428 | struct GTY((chain_next ("%h.outer"))) c_scope { |
14077d68 ZW |
429 | /* The scope containing this one. */ |
430 | struct c_scope *outer; | |
431 | ||
432 | /* The next outermost function scope. */ | |
433 | struct c_scope *outer_function; | |
434 | ||
f75fbaf7 ZW |
435 | /* All bindings in this scope. */ |
436 | struct c_binding *bindings; | |
14077d68 ZW |
437 | |
438 | /* For each scope (except the global one), a chain of BLOCK nodes | |
439 | for all the scopes that were entered and exited one level down. */ | |
440 | tree blocks; | |
f91f41b2 | 441 | tree blocks_last; |
14077d68 | 442 | |
f75fbaf7 ZW |
443 | /* The depth of this scope. Used to keep the ->shadowed chain of |
444 | bindings sorted innermost to outermost. */ | |
445 | unsigned int depth : 28; | |
446 | ||
14077d68 ZW |
447 | /* True if we are currently filling this scope with parameter |
448 | declarations. */ | |
1c62e7b2 | 449 | BOOL_BITFIELD parm_flag : 1; |
14077d68 | 450 | |
52ffd86e MS |
451 | /* True if we saw [*] in this scope. Used to give an error messages |
452 | if these appears in a function definition. */ | |
453 | BOOL_BITFIELD had_vla_unspec : 1; | |
454 | ||
55d54003 ZW |
455 | /* True if we already complained about forward parameter decls |
456 | in this scope. This prevents double warnings on | |
457 | foo (int a; int b; ...) */ | |
1c62e7b2 | 458 | BOOL_BITFIELD warned_forward_parm_decls : 1; |
55d54003 | 459 | |
14077d68 ZW |
460 | /* True if this is the outermost block scope of a function body. |
461 | This scope contains the parameters, the local variables declared | |
462 | in the outermost block, and all the labels (except those in | |
463 | nested functions, or declared at block scope with __label__). */ | |
1c62e7b2 | 464 | BOOL_BITFIELD function_body : 1; |
14077d68 ZW |
465 | |
466 | /* True means make a BLOCK for this scope no matter what. */ | |
1c62e7b2 | 467 | BOOL_BITFIELD keep : 1; |
6ec637a4 JJ |
468 | |
469 | /* True means that an unsuffixed float constant is _Decimal64. */ | |
470 | BOOL_BITFIELD float_const_decimal64 : 1; | |
e1b7793c ILT |
471 | |
472 | /* True if this scope has any label bindings. This is used to speed | |
473 | up searching for labels when popping scopes, particularly since | |
474 | labels are normally only found at function scope. */ | |
475 | BOOL_BITFIELD has_label_bindings : 1; | |
744f0946 ILT |
476 | |
477 | /* True if we should issue a warning if a goto statement crosses any | |
478 | of the bindings. We still need to check the list of bindings to | |
479 | find the specific ones we need to warn about. This is true if | |
480 | decl_jump_unsafe would return true for any of the bindings. This | |
481 | is used to avoid looping over all the bindings unnecessarily. */ | |
482 | BOOL_BITFIELD has_jump_unsafe_decl : 1; | |
14077d68 | 483 | }; |
51e29401 | 484 | |
f8521984 | 485 | /* The scope currently in effect. */ |
6645c3fa | 486 | |
f8521984 | 487 | static GTY(()) struct c_scope *current_scope; |
51e29401 | 488 | |
14e33ee8 ZW |
489 | /* The innermost function scope. Ordinary (not explicitly declared) |
490 | labels, bindings to error_mark_node, and the lazily-created | |
491 | bindings of __func__ and its friends get this scope. */ | |
14077d68 | 492 | |
f8521984 | 493 | static GTY(()) struct c_scope *current_function_scope; |
14e33ee8 | 494 | |
f75fbaf7 ZW |
495 | /* The C file scope. This is reset for each input translation unit. */ |
496 | ||
497 | static GTY(()) struct c_scope *file_scope; | |
498 | ||
499 | /* The outermost scope. This is used for all declarations with | |
500 | external linkage, and only these, hence the name. */ | |
501 | ||
502 | static GTY(()) struct c_scope *external_scope; | |
503 | ||
504 | /* A chain of c_scope structures awaiting reuse. */ | |
505 | ||
1431042e | 506 | static GTY((deletable)) struct c_scope *scope_freelist; |
f75fbaf7 ZW |
507 | |
508 | /* A chain of c_binding structures awaiting reuse. */ | |
51e29401 | 509 | |
1431042e | 510 | static GTY((deletable)) struct c_binding *binding_freelist; |
51e29401 | 511 | |
3d93cdfa | 512 | /* Append VAR to LIST in scope SCOPE. */ |
f91f41b2 ZW |
513 | #define SCOPE_LIST_APPEND(scope, list, decl) do { \ |
514 | struct c_scope *s_ = (scope); \ | |
515 | tree d_ = (decl); \ | |
516 | if (s_->list##_last) \ | |
87caf699 | 517 | BLOCK_CHAIN (s_->list##_last) = d_; \ |
f91f41b2 ZW |
518 | else \ |
519 | s_->list = d_; \ | |
520 | s_->list##_last = d_; \ | |
521 | } while (0) | |
522 | ||
523 | /* Concatenate FROM in scope FSCOPE onto TO in scope TSCOPE. */ | |
524 | #define SCOPE_LIST_CONCAT(tscope, to, fscope, from) do { \ | |
525 | struct c_scope *t_ = (tscope); \ | |
526 | struct c_scope *f_ = (fscope); \ | |
527 | if (t_->to##_last) \ | |
87caf699 | 528 | BLOCK_CHAIN (t_->to##_last) = f_->from; \ |
f91f41b2 ZW |
529 | else \ |
530 | t_->to = f_->from; \ | |
531 | t_->to##_last = f_->from##_last; \ | |
532 | } while (0) | |
533 | ||
991d6621 JM |
534 | /* A c_inline_static structure stores details of a static identifier |
535 | referenced in a definition of a function that may be an inline | |
536 | definition if no subsequent declaration of that function uses | |
537 | "extern" or does not use "inline". */ | |
538 | ||
539 | struct GTY((chain_next ("%h.next"))) c_inline_static { | |
540 | /* The location for a diagnostic. */ | |
541 | location_t location; | |
542 | ||
543 | /* The function that may be an inline definition. */ | |
544 | tree function; | |
545 | ||
546 | /* The object or function referenced. */ | |
547 | tree static_decl; | |
548 | ||
549 | /* What sort of reference this is. */ | |
550 | enum c_inline_static_type type; | |
551 | ||
552 | /* The next such structure or NULL. */ | |
553 | struct c_inline_static *next; | |
554 | }; | |
555 | ||
556 | /* List of static identifiers used or referenced in functions that may | |
557 | be inline definitions. */ | |
558 | static GTY(()) struct c_inline_static *c_inline_statics; | |
559 | ||
f8521984 | 560 | /* True means unconditionally make a BLOCK for the next scope pushed. */ |
51e29401 | 561 | |
14e33ee8 | 562 | static bool keep_next_level_flag; |
51e29401 | 563 | |
f75fbaf7 | 564 | /* True means the next call to push_scope will be the outermost scope |
a8ccdffe ZW |
565 | of a function body, so do not push a new scope, merely cease |
566 | expecting parameter decls. */ | |
6645c3fa | 567 | |
a8ccdffe | 568 | static bool next_is_function_body; |
51e29401 | 569 | |
9771b263 | 570 | /* A vector of pointers to c_binding structures. */ |
dc491a25 ILT |
571 | |
572 | typedef struct c_binding *c_binding_ptr; | |
dc491a25 ILT |
573 | |
574 | /* Information that we keep for a struct or union while it is being | |
575 | parsed. */ | |
576 | ||
577 | struct c_struct_parse_info | |
578 | { | |
579 | /* If warn_cxx_compat, a list of types defined within this | |
580 | struct. */ | |
bf4fa671 | 581 | auto_vec<tree> struct_types; |
dc491a25 ILT |
582 | /* If warn_cxx_compat, a list of field names which have bindings, |
583 | and which are defined in this struct, but which are not defined | |
584 | in any enclosing struct. This is used to clear the in_struct | |
585 | field of the c_bindings structure. */ | |
bf4fa671 | 586 | auto_vec<c_binding_ptr> fields; |
dc491a25 ILT |
587 | /* If warn_cxx_compat, a list of typedef names used when defining |
588 | fields in this struct. */ | |
bf4fa671 | 589 | auto_vec<tree> typedefs_seen; |
dc491a25 ILT |
590 | }; |
591 | ||
592 | /* Information for the struct or union currently being parsed, or | |
593 | NULL if not parsing a struct or union. */ | |
594 | static struct c_struct_parse_info *struct_parse_info; | |
595 | ||
51e29401 | 596 | /* Forward declarations. */ |
f75fbaf7 | 597 | static tree lookup_name_in_scope (tree, struct c_scope *); |
c2255bc4 | 598 | static tree c_make_fname_decl (location_t, tree, int); |
deb176fa JM |
599 | static tree grokdeclarator (const struct c_declarator *, |
600 | struct c_declspecs *, | |
928c19bb JM |
601 | enum decl_context, bool, tree *, tree *, tree *, |
602 | bool *, enum deprecated_states); | |
f8893e47 | 603 | static tree grokparms (struct c_arg_info *, bool); |
35b1a6fa | 604 | static void layout_array_type (tree); |
35aff4fb MP |
605 | static void warn_defaults_to (location_t, int, const char *, ...) |
606 | ATTRIBUTE_GCC_DIAG(3,4); | |
cd5da983 | 607 | static const char *header_for_builtin_fn (enum built_in_function); |
51e29401 | 608 | \f |
ed3d0b14 ILT |
609 | /* T is a statement. Add it to the statement-tree. This is the |
610 | C/ObjC version--C++ has a slightly different version of this | |
611 | function. */ | |
612 | ||
613 | tree | |
614 | add_stmt (tree t) | |
615 | { | |
616 | enum tree_code code = TREE_CODE (t); | |
617 | ||
07beea0d | 618 | if (CAN_HAVE_LOCATION_P (t) && code != LABEL_EXPR) |
ed3d0b14 ILT |
619 | { |
620 | if (!EXPR_HAS_LOCATION (t)) | |
621 | SET_EXPR_LOCATION (t, input_location); | |
622 | } | |
623 | ||
624 | if (code == LABEL_EXPR || code == CASE_LABEL_EXPR) | |
625 | STATEMENT_LIST_HAS_LABEL (cur_stmt_list) = 1; | |
626 | ||
627 | /* Add T to the statement-tree. Non-side-effect statements need to be | |
628 | recorded during statement expressions. */ | |
38e01f9e NF |
629 | if (!building_stmt_list_p ()) |
630 | push_stmt_list (); | |
ed3d0b14 ILT |
631 | append_to_statement_list_force (t, &cur_stmt_list); |
632 | ||
633 | return t; | |
634 | } | |
412cd719 TG |
635 | \f |
636 | /* Build a pointer type using the default pointer mode. */ | |
637 | ||
638 | static tree | |
639 | c_build_pointer_type (tree to_type) | |
640 | { | |
641 | addr_space_t as = to_type == error_mark_node? ADDR_SPACE_GENERIC | |
642 | : TYPE_ADDR_SPACE (to_type); | |
ef4bddc2 | 643 | machine_mode pointer_mode; |
412cd719 TG |
644 | |
645 | if (as != ADDR_SPACE_GENERIC || c_default_pointer_mode == VOIDmode) | |
646 | pointer_mode = targetm.addr_space.pointer_mode (as); | |
647 | else | |
648 | pointer_mode = c_default_pointer_mode; | |
649 | return build_pointer_type_for_mode (to_type, pointer_mode, false); | |
650 | } | |
651 | ||
ed3d0b14 | 652 | \f |
744f0946 ILT |
653 | /* Return true if we will want to say something if a goto statement |
654 | crosses DECL. */ | |
655 | ||
656 | static bool | |
657 | decl_jump_unsafe (tree decl) | |
658 | { | |
b504a918 | 659 | if (error_operand_p (decl)) |
744f0946 ILT |
660 | return false; |
661 | ||
662 | /* Always warn about crossing variably modified types. */ | |
0ae9bd27 | 663 | if ((VAR_P (decl) || TREE_CODE (decl) == TYPE_DECL) |
744f0946 ILT |
664 | && variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) |
665 | return true; | |
666 | ||
667 | /* Otherwise, only warn if -Wgoto-misses-init and this is an | |
668 | initialized automatic decl. */ | |
669 | if (warn_jump_misses_init | |
0ae9bd27 | 670 | && VAR_P (decl) |
744f0946 ILT |
671 | && !TREE_STATIC (decl) |
672 | && DECL_INITIAL (decl) != NULL_TREE) | |
673 | return true; | |
674 | ||
675 | return false; | |
676 | } | |
677 | \f | |
e23bd218 | 678 | |
51e29401 | 679 | void |
35b1a6fa | 680 | c_print_identifier (FILE *file, tree node, int indent) |
51e29401 | 681 | { |
ddc8de03 PM |
682 | void (*save) (enum c_oracle_request, tree identifier); |
683 | ||
684 | /* Temporarily hide any binding oracle. Without this, calls to | |
685 | debug_tree from the debugger will end up calling into the oracle, | |
686 | making for a confusing debug session. As the oracle isn't needed | |
687 | here for normal operation, it's simplest to suppress it. */ | |
688 | save = c_binding_oracle; | |
689 | c_binding_oracle = NULL; | |
690 | ||
f75fbaf7 ZW |
691 | print_node (file, "symbol", I_SYMBOL_DECL (node), indent + 4); |
692 | print_node (file, "tag", I_TAG_DECL (node), indent + 4); | |
693 | print_node (file, "label", I_LABEL_DECL (node), indent + 4); | |
eea1139b | 694 | if (C_IS_RESERVED_WORD (node) && C_RID_CODE (node) != RID_CXX_COMPAT_WARN) |
0e5921e8 ZW |
695 | { |
696 | tree rid = ridpointers[C_RID_CODE (node)]; | |
697 | indent_to (file, indent + 4); | |
edb89024 | 698 | fprintf (file, "rid " HOST_PTR_PRINTF " \"%s\"", |
75b6f3fd | 699 | (void *) rid, IDENTIFIER_POINTER (rid)); |
0e5921e8 | 700 | } |
ddc8de03 PM |
701 | |
702 | c_binding_oracle = save; | |
51e29401 | 703 | } |
f75fbaf7 ZW |
704 | |
705 | /* Establish a binding between NAME, an IDENTIFIER_NODE, and DECL, | |
706 | which may be any of several kinds of DECL or TYPE or error_mark_node, | |
707 | in the scope SCOPE. */ | |
708 | static void | |
b3f27c15 JJ |
709 | bind (tree name, tree decl, struct c_scope *scope, bool invisible, |
710 | bool nested, location_t locus) | |
f75fbaf7 ZW |
711 | { |
712 | struct c_binding *b, **here; | |
713 | ||
714 | if (binding_freelist) | |
715 | { | |
716 | b = binding_freelist; | |
717 | binding_freelist = b->prev; | |
718 | } | |
719 | else | |
766090c2 | 720 | b = ggc_alloc<c_binding> (); |
f75fbaf7 ZW |
721 | |
722 | b->shadowed = 0; | |
723 | b->decl = decl; | |
724 | b->id = name; | |
9aaabf8a ZW |
725 | b->depth = scope->depth; |
726 | b->invisible = invisible; | |
727 | b->nested = nested; | |
0b410f0b | 728 | b->inner_comp = 0; |
dc491a25 | 729 | b->in_struct = 0; |
b3f27c15 | 730 | b->locus = locus; |
0b410f0b | 731 | |
e1b7793c | 732 | b->u.type = NULL; |
f75fbaf7 ZW |
733 | |
734 | b->prev = scope->bindings; | |
735 | scope->bindings = b; | |
736 | ||
744f0946 ILT |
737 | if (decl_jump_unsafe (decl)) |
738 | scope->has_jump_unsafe_decl = 1; | |
739 | ||
f75fbaf7 ZW |
740 | if (!name) |
741 | return; | |
742 | ||
743 | switch (TREE_CODE (decl)) | |
744 | { | |
745 | case LABEL_DECL: here = &I_LABEL_BINDING (name); break; | |
746 | case ENUMERAL_TYPE: | |
747 | case UNION_TYPE: | |
748 | case RECORD_TYPE: here = &I_TAG_BINDING (name); break; | |
749 | case VAR_DECL: | |
750 | case FUNCTION_DECL: | |
751 | case TYPE_DECL: | |
752 | case CONST_DECL: | |
753 | case PARM_DECL: | |
754 | case ERROR_MARK: here = &I_SYMBOL_BINDING (name); break; | |
755 | ||
756 | default: | |
366de0ce | 757 | gcc_unreachable (); |
f75fbaf7 ZW |
758 | } |
759 | ||
760 | /* Locate the appropriate place in the chain of shadowed decls | |
761 | to insert this binding. Normally, scope == current_scope and | |
762 | this does nothing. */ | |
9aaabf8a | 763 | while (*here && (*here)->depth > scope->depth) |
f75fbaf7 ZW |
764 | here = &(*here)->shadowed; |
765 | ||
766 | b->shadowed = *here; | |
767 | *here = b; | |
768 | } | |
769 | ||
770 | /* Clear the binding structure B, stick it on the binding_freelist, | |
771 | and return the former value of b->prev. This is used by pop_scope | |
772 | and get_parm_info to iterate destructively over all the bindings | |
773 | from a given scope. */ | |
774 | static struct c_binding * | |
775 | free_binding_and_advance (struct c_binding *b) | |
776 | { | |
777 | struct c_binding *prev = b->prev; | |
778 | ||
9aaabf8a | 779 | memset (b, 0, sizeof (struct c_binding)); |
f75fbaf7 ZW |
780 | b->prev = binding_freelist; |
781 | binding_freelist = b; | |
782 | ||
783 | return prev; | |
784 | } | |
785 | ||
e1b7793c ILT |
786 | /* Bind a label. Like bind, but skip fields which aren't used for |
787 | labels, and add the LABEL_VARS value. */ | |
788 | static void | |
789 | bind_label (tree name, tree label, struct c_scope *scope, | |
790 | struct c_label_vars *label_vars) | |
791 | { | |
792 | struct c_binding *b; | |
793 | ||
794 | bind (name, label, scope, /*invisible=*/false, /*nested=*/false, | |
795 | UNKNOWN_LOCATION); | |
796 | ||
797 | scope->has_label_bindings = true; | |
798 | ||
799 | b = scope->bindings; | |
800 | gcc_assert (b->decl == label); | |
801 | label_vars->shadowed = b->u.label; | |
802 | b->u.label = label_vars; | |
803 | } | |
51e29401 | 804 | \f |
b4892310 | 805 | /* Hook called at end of compilation to assume 1 elt |
f8521984 | 806 | for a file-scope tentative array defn that wasn't complete before. */ |
6645c3fa | 807 | |
b4892310 | 808 | void |
35b1a6fa | 809 | c_finish_incomplete_decl (tree decl) |
b4892310 | 810 | { |
0ae9bd27 | 811 | if (VAR_P (decl)) |
b4892310 RS |
812 | { |
813 | tree type = TREE_TYPE (decl); | |
5cfac96e RK |
814 | if (type != error_mark_node |
815 | && TREE_CODE (type) == ARRAY_TYPE | |
3f75a254 | 816 | && !DECL_EXTERNAL (decl) |
3fa8871b | 817 | && TYPE_DOMAIN (type) == NULL_TREE) |
b4892310 | 818 | { |
c2255bc4 AH |
819 | warning_at (DECL_SOURCE_LOCATION (decl), |
820 | 0, "array %q+D assumed to have one element", decl); | |
5cfac96e | 821 | |
aab038d5 | 822 | complete_array_type (&TREE_TYPE (decl), NULL_TREE, true); |
b4892310 | 823 | |
156030d3 | 824 | relayout_decl (decl); |
b4892310 RS |
825 | } |
826 | } | |
827 | } | |
828 | \f | |
991d6621 JM |
829 | /* Record that inline function FUNC contains a reference (location |
830 | LOC) to static DECL (file-scope or function-local according to | |
831 | TYPE). */ | |
832 | ||
833 | void | |
834 | record_inline_static (location_t loc, tree func, tree decl, | |
835 | enum c_inline_static_type type) | |
836 | { | |
766090c2 | 837 | c_inline_static *csi = ggc_alloc<c_inline_static> (); |
991d6621 JM |
838 | csi->location = loc; |
839 | csi->function = func; | |
840 | csi->static_decl = decl; | |
841 | csi->type = type; | |
842 | csi->next = c_inline_statics; | |
843 | c_inline_statics = csi; | |
844 | } | |
845 | ||
846 | /* Check for references to static declarations in inline functions at | |
847 | the end of the translation unit and diagnose them if the functions | |
848 | are still inline definitions. */ | |
849 | ||
850 | static void | |
851 | check_inline_statics (void) | |
852 | { | |
853 | struct c_inline_static *csi; | |
854 | for (csi = c_inline_statics; csi; csi = csi->next) | |
855 | { | |
856 | if (DECL_EXTERNAL (csi->function)) | |
857 | switch (csi->type) | |
858 | { | |
859 | case csi_internal: | |
860 | pedwarn (csi->location, 0, | |
861 | "%qD is static but used in inline function %qD " | |
862 | "which is not static", csi->static_decl, csi->function); | |
863 | break; | |
864 | case csi_modifiable: | |
865 | pedwarn (csi->location, 0, | |
866 | "%q+D is static but declared in inline function %qD " | |
867 | "which is not static", csi->static_decl, csi->function); | |
868 | break; | |
869 | default: | |
870 | gcc_unreachable (); | |
871 | } | |
872 | } | |
873 | c_inline_statics = NULL; | |
874 | } | |
875 | \f | |
e1b7793c ILT |
876 | /* Fill in a c_spot_bindings structure. If DEFINING is true, set it |
877 | for the current state, otherwise set it to uninitialized. */ | |
878 | ||
879 | static void | |
880 | set_spot_bindings (struct c_spot_bindings *p, bool defining) | |
881 | { | |
882 | if (defining) | |
883 | { | |
884 | p->scope = current_scope; | |
885 | p->bindings_in_scope = current_scope->bindings; | |
886 | } | |
887 | else | |
888 | { | |
889 | p->scope = NULL; | |
890 | p->bindings_in_scope = NULL; | |
891 | } | |
892 | p->stmt_exprs = 0; | |
893 | p->left_stmt_expr = false; | |
894 | } | |
895 | ||
e1b7793c ILT |
896 | /* Update spot bindings P as we pop out of SCOPE. Return true if we |
897 | should push decls for a label. */ | |
898 | ||
899 | static bool | |
900 | update_spot_bindings (struct c_scope *scope, struct c_spot_bindings *p) | |
901 | { | |
902 | if (p->scope != scope) | |
903 | { | |
904 | /* This label or goto is defined in some other scope, or it is a | |
905 | label which is not yet defined. There is nothing to | |
906 | update. */ | |
907 | return false; | |
908 | } | |
909 | ||
910 | /* Adjust the spot bindings to refer to the bindings already defined | |
911 | in the enclosing scope. */ | |
912 | p->scope = scope->outer; | |
913 | p->bindings_in_scope = p->scope->bindings; | |
914 | ||
915 | return true; | |
916 | } | |
917 | \f | |
264fa2db ZL |
918 | /* The Objective-C front-end often needs to determine the current scope. */ |
919 | ||
920 | void * | |
bc095846 | 921 | objc_get_current_scope (void) |
264fa2db ZL |
922 | { |
923 | return current_scope; | |
924 | } | |
925 | ||
926 | /* The following function is used only by Objective-C. It needs to live here | |
927 | because it accesses the innards of c_scope. */ | |
928 | ||
929 | void | |
930 | objc_mark_locals_volatile (void *enclosing_blk) | |
931 | { | |
932 | struct c_scope *scope; | |
f75fbaf7 | 933 | struct c_binding *b; |
e13e48e7 EC |
934 | |
935 | for (scope = current_scope; | |
264fa2db ZL |
936 | scope && scope != enclosing_blk; |
937 | scope = scope->outer) | |
938 | { | |
f75fbaf7 | 939 | for (b = scope->bindings; b; b = b->prev) |
58393038 | 940 | objc_volatilize_decl (b->decl); |
f75fbaf7 | 941 | |
264fa2db ZL |
942 | /* Do not climb up past the current function. */ |
943 | if (scope->function_body) | |
944 | break; | |
e13e48e7 EC |
945 | } |
946 | } | |
947 | ||
c99c0026 | 948 | /* Return true if we are in the global binding level. */ |
51e29401 | 949 | |
c99c0026 | 950 | bool |
35b1a6fa | 951 | global_bindings_p (void) |
51e29401 | 952 | { |
96703596 | 953 | return current_scope == file_scope; |
51e29401 RS |
954 | } |
955 | ||
f7584c81 DP |
956 | /* Return true if we're declaring parameters in an old-style function |
957 | declaration. */ | |
958 | ||
959 | bool | |
960 | old_style_parameter_scope (void) | |
961 | { | |
962 | /* If processing parameters and there is no function statement list, we | |
963 | * have an old-style function declaration. */ | |
964 | return (current_scope->parm_flag && !DECL_SAVED_TREE (current_function_decl)); | |
965 | } | |
966 | ||
51e29401 | 967 | void |
35b1a6fa | 968 | keep_next_level (void) |
51e29401 | 969 | { |
14e33ee8 | 970 | keep_next_level_flag = true; |
51e29401 RS |
971 | } |
972 | ||
6ec637a4 JJ |
973 | /* Set the flag for the FLOAT_CONST_DECIMAL64 pragma being ON. */ |
974 | ||
975 | void | |
976 | set_float_const_decimal64 (void) | |
977 | { | |
978 | current_scope->float_const_decimal64 = true; | |
979 | } | |
980 | ||
981 | /* Clear the flag for the FLOAT_CONST_DECIMAL64 pragma. */ | |
982 | ||
983 | void | |
984 | clear_float_const_decimal64 (void) | |
985 | { | |
986 | current_scope->float_const_decimal64 = false; | |
987 | } | |
988 | ||
989 | /* Return nonzero if an unsuffixed float constant is _Decimal64. */ | |
990 | ||
991 | bool | |
992 | float_const_decimal64_p (void) | |
993 | { | |
994 | return current_scope->float_const_decimal64; | |
995 | } | |
996 | ||
f8521984 | 997 | /* Identify this scope as currently being filled with parameters. */ |
51e29401 RS |
998 | |
999 | void | |
eb1dfbb2 | 1000 | declare_parm_level (void) |
51e29401 | 1001 | { |
f8521984 | 1002 | current_scope->parm_flag = true; |
51e29401 RS |
1003 | } |
1004 | ||
51e29401 | 1005 | void |
f75fbaf7 | 1006 | push_scope (void) |
51e29401 | 1007 | { |
a8ccdffe | 1008 | if (next_is_function_body) |
51e29401 | 1009 | { |
339a28b9 ZW |
1010 | /* This is the transition from the parameters to the top level |
1011 | of the function body. These are the same scope | |
f8521984 | 1012 | (C99 6.2.1p4,6) so we do not push another scope structure. |
a8ccdffe ZW |
1013 | next_is_function_body is set only by store_parm_decls, which |
1014 | in turn is called when and only when we are about to | |
1015 | encounter the opening curly brace for the function body. | |
339a28b9 | 1016 | |
a8ccdffe ZW |
1017 | The outermost block of a function always gets a BLOCK node, |
1018 | because the debugging output routines expect that each | |
59e4e217 | 1019 | function has at least one BLOCK. */ |
f8521984 ZW |
1020 | current_scope->parm_flag = false; |
1021 | current_scope->function_body = true; | |
a8ccdffe | 1022 | current_scope->keep = true; |
f8521984 ZW |
1023 | current_scope->outer_function = current_function_scope; |
1024 | current_function_scope = current_scope; | |
14e33ee8 ZW |
1025 | |
1026 | keep_next_level_flag = false; | |
a8ccdffe | 1027 | next_is_function_body = false; |
6ec637a4 JJ |
1028 | |
1029 | /* The FLOAT_CONST_DECIMAL64 pragma applies to nested scopes. */ | |
1030 | if (current_scope->outer) | |
1031 | current_scope->float_const_decimal64 | |
1032 | = current_scope->outer->float_const_decimal64; | |
1033 | else | |
1034 | current_scope->float_const_decimal64 = false; | |
51e29401 | 1035 | } |
339a28b9 ZW |
1036 | else |
1037 | { | |
f75fbaf7 ZW |
1038 | struct c_scope *scope; |
1039 | if (scope_freelist) | |
1040 | { | |
1041 | scope = scope_freelist; | |
1042 | scope_freelist = scope->outer; | |
1043 | } | |
1044 | else | |
766090c2 | 1045 | scope = ggc_cleared_alloc<c_scope> (); |
51e29401 | 1046 | |
6ec637a4 JJ |
1047 | /* The FLOAT_CONST_DECIMAL64 pragma applies to nested scopes. */ |
1048 | if (current_scope) | |
1049 | scope->float_const_decimal64 = current_scope->float_const_decimal64; | |
1050 | else | |
1051 | scope->float_const_decimal64 = false; | |
1052 | ||
f8521984 ZW |
1053 | scope->keep = keep_next_level_flag; |
1054 | scope->outer = current_scope; | |
f75fbaf7 ZW |
1055 | scope->depth = current_scope ? (current_scope->depth + 1) : 0; |
1056 | ||
1057 | /* Check for scope depth overflow. Unlikely (2^28 == 268,435,456) but | |
1058 | possible. */ | |
1059 | if (current_scope && scope->depth == 0) | |
1060 | { | |
1061 | scope->depth--; | |
72c4e4db | 1062 | sorry ("GCC supports only %u nested scopes", scope->depth); |
f75fbaf7 | 1063 | } |
118a3a8b | 1064 | |
f8521984 ZW |
1065 | current_scope = scope; |
1066 | keep_next_level_flag = false; | |
339a28b9 | 1067 | } |
0500d6f9 | 1068 | } |
6645c3fa | 1069 | |
e1b7793c ILT |
1070 | /* This is called when we are leaving SCOPE. For each label defined |
1071 | in SCOPE, add any appropriate decls to its decls_in_scope fields. | |
1072 | These are the decls whose initialization will be skipped by a goto | |
1073 | later in the function. */ | |
1074 | ||
1075 | static void | |
1076 | update_label_decls (struct c_scope *scope) | |
1077 | { | |
1078 | struct c_scope *s; | |
1079 | ||
1080 | s = scope; | |
1081 | while (s != NULL) | |
1082 | { | |
1083 | if (s->has_label_bindings) | |
1084 | { | |
1085 | struct c_binding *b; | |
1086 | ||
1087 | for (b = s->bindings; b != NULL; b = b->prev) | |
1088 | { | |
1089 | struct c_label_vars *label_vars; | |
1090 | struct c_binding *b1; | |
744f0946 | 1091 | bool hjud; |
e1b7793c ILT |
1092 | unsigned int ix; |
1093 | struct c_goto_bindings *g; | |
1094 | ||
1095 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1096 | continue; | |
1097 | label_vars = b->u.label; | |
1098 | ||
1099 | b1 = label_vars->label_bindings.bindings_in_scope; | |
744f0946 ILT |
1100 | if (label_vars->label_bindings.scope == NULL) |
1101 | hjud = false; | |
1102 | else | |
1103 | hjud = label_vars->label_bindings.scope->has_jump_unsafe_decl; | |
e1b7793c ILT |
1104 | if (update_spot_bindings (scope, &label_vars->label_bindings)) |
1105 | { | |
1106 | /* This label is defined in this scope. */ | |
744f0946 | 1107 | if (hjud) |
e1b7793c | 1108 | { |
744f0946 ILT |
1109 | for (; b1 != NULL; b1 = b1->prev) |
1110 | { | |
1111 | /* A goto from later in the function to this | |
1112 | label will never see the initialization | |
1113 | of B1, if any. Save it to issue a | |
1114 | warning if needed. */ | |
1115 | if (decl_jump_unsafe (b1->decl)) | |
9771b263 | 1116 | vec_safe_push(label_vars->decls_in_scope, b1->decl); |
744f0946 | 1117 | } |
e1b7793c ILT |
1118 | } |
1119 | } | |
1120 | ||
1121 | /* Update the bindings of any goto statements associated | |
1122 | with this label. */ | |
9771b263 | 1123 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1124 | update_spot_bindings (scope, &g->goto_bindings); |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* Don't search beyond the current function. */ | |
1129 | if (s == current_function_scope) | |
1130 | break; | |
1131 | ||
1132 | s = s->outer; | |
1133 | } | |
1134 | } | |
1135 | ||
9affb2c7 ZW |
1136 | /* Set the TYPE_CONTEXT of all of TYPE's variants to CONTEXT. */ |
1137 | ||
1138 | static void | |
1139 | set_type_context (tree type, tree context) | |
1140 | { | |
1141 | for (type = TYPE_MAIN_VARIANT (type); type; | |
1142 | type = TYPE_NEXT_VARIANT (type)) | |
1143 | TYPE_CONTEXT (type) = context; | |
1144 | } | |
1145 | ||
f8521984 | 1146 | /* Exit a scope. Restore the state of the identifier-decl mappings |
f75fbaf7 ZW |
1147 | that were in effect when this scope was entered. Return a BLOCK |
1148 | node containing all the DECLs in this scope that are of interest | |
1149 | to debug info generation. */ | |
51e29401 RS |
1150 | |
1151 | tree | |
f75fbaf7 | 1152 | pop_scope (void) |
51e29401 | 1153 | { |
f91f41b2 | 1154 | struct c_scope *scope = current_scope; |
f75fbaf7 ZW |
1155 | tree block, context, p; |
1156 | struct c_binding *b; | |
9cd51ef6 | 1157 | |
f75fbaf7 ZW |
1158 | bool functionbody = scope->function_body; |
1159 | bool keep = functionbody || scope->keep || scope->bindings; | |
f91f41b2 | 1160 | |
e1b7793c | 1161 | update_label_decls (scope); |
187230a7 | 1162 | |
f91f41b2 ZW |
1163 | /* If appropriate, create a BLOCK to record the decls for the life |
1164 | of this function. */ | |
3fa8871b | 1165 | block = NULL_TREE; |
f91f41b2 ZW |
1166 | if (keep) |
1167 | { | |
1168 | block = make_node (BLOCK); | |
f91f41b2 ZW |
1169 | BLOCK_SUBBLOCKS (block) = scope->blocks; |
1170 | TREE_USED (block) = 1; | |
f91f41b2 | 1171 | |
f75fbaf7 | 1172 | /* In each subblock, record that this is its superior. */ |
87caf699 | 1173 | for (p = scope->blocks; p; p = BLOCK_CHAIN (p)) |
f75fbaf7 | 1174 | BLOCK_SUPERCONTEXT (p) = block; |
f91f41b2 | 1175 | |
3fa8871b | 1176 | BLOCK_VARS (block) = NULL_TREE; |
f75fbaf7 | 1177 | } |
339a28b9 | 1178 | |
f75fbaf7 ZW |
1179 | /* The TYPE_CONTEXTs for all of the tagged types belonging to this |
1180 | scope must be set so that they point to the appropriate | |
1181 | construct, i.e. either to the current FUNCTION_DECL node, or | |
1182 | else to the BLOCK node we just constructed. | |
f91f41b2 | 1183 | |
f75fbaf7 ZW |
1184 | Note that for tagged types whose scope is just the formal |
1185 | parameter list for some function type specification, we can't | |
1186 | properly set their TYPE_CONTEXTs here, because we don't have a | |
1187 | pointer to the appropriate FUNCTION_TYPE node readily available | |
1188 | to us. For those cases, the TYPE_CONTEXTs of the relevant tagged | |
1189 | type nodes get set in `grokdeclarator' as soon as we have created | |
1190 | the FUNCTION_TYPE node which will represent the "scope" for these | |
1191 | "parameter list local" tagged types. */ | |
1192 | if (scope->function_body) | |
1193 | context = current_function_decl; | |
1194 | else if (scope == file_scope) | |
eecec698 | 1195 | { |
e5e391d6 MO |
1196 | tree file_decl |
1197 | = build_translation_unit_decl (get_identifier (main_input_filename)); | |
eecec698 | 1198 | context = file_decl; |
881a5e60 | 1199 | debug_hooks->register_main_translation_unit (file_decl); |
eecec698 | 1200 | } |
f75fbaf7 ZW |
1201 | else |
1202 | context = block; | |
f91f41b2 | 1203 | |
f75fbaf7 ZW |
1204 | /* Clear all bindings in this scope. */ |
1205 | for (b = scope->bindings; b; b = free_binding_and_advance (b)) | |
339a28b9 | 1206 | { |
f75fbaf7 | 1207 | p = b->decl; |
f91f41b2 | 1208 | switch (TREE_CODE (p)) |
14e33ee8 | 1209 | { |
f91f41b2 | 1210 | case LABEL_DECL: |
f75fbaf7 | 1211 | /* Warnings for unused labels, errors for undefined labels. */ |
f91f41b2 | 1212 | if (TREE_USED (p) && !DECL_INITIAL (p)) |
14e33ee8 | 1213 | { |
dee15844 | 1214 | error ("label %q+D used but not defined", p); |
f91f41b2 | 1215 | DECL_INITIAL (p) = error_mark_node; |
14e33ee8 | 1216 | } |
b8698a0f | 1217 | else |
c616e51b MLI |
1218 | warn_for_unused_label (p); |
1219 | ||
f75fbaf7 | 1220 | /* Labels go in BLOCK_VARS. */ |
910ad8de | 1221 | DECL_CHAIN (p) = BLOCK_VARS (block); |
f75fbaf7 | 1222 | BLOCK_VARS (block) = p; |
366de0ce | 1223 | gcc_assert (I_LABEL_BINDING (b->id) == b); |
c22cacf3 | 1224 | I_LABEL_BINDING (b->id) = b->shadowed; |
e1b7793c ILT |
1225 | |
1226 | /* Also pop back to the shadowed label_vars. */ | |
1227 | release_tree_vector (b->u.label->decls_in_scope); | |
1228 | b->u.label = b->u.label->shadowed; | |
c22cacf3 | 1229 | break; |
339a28b9 | 1230 | |
f75fbaf7 ZW |
1231 | case ENUMERAL_TYPE: |
1232 | case UNION_TYPE: | |
1233 | case RECORD_TYPE: | |
9affb2c7 | 1234 | set_type_context (p, context); |
f75fbaf7 ZW |
1235 | |
1236 | /* Types may not have tag-names, in which case the type | |
1237 | appears in the bindings list with b->id NULL. */ | |
1238 | if (b->id) | |
1239 | { | |
366de0ce | 1240 | gcc_assert (I_TAG_BINDING (b->id) == b); |
f75fbaf7 ZW |
1241 | I_TAG_BINDING (b->id) = b->shadowed; |
1242 | } | |
c22cacf3 | 1243 | break; |
339a28b9 | 1244 | |
f91f41b2 | 1245 | case FUNCTION_DECL: |
f75fbaf7 ZW |
1246 | /* Propagate TREE_ADDRESSABLE from nested functions to their |
1247 | containing functions. */ | |
3f75a254 | 1248 | if (!TREE_ASM_WRITTEN (p) |
3fa8871b | 1249 | && DECL_INITIAL (p) != NULL_TREE |
f91f41b2 | 1250 | && TREE_ADDRESSABLE (p) |
3fa8871b | 1251 | && DECL_ABSTRACT_ORIGIN (p) != NULL_TREE |
f91f41b2 ZW |
1252 | && DECL_ABSTRACT_ORIGIN (p) != p) |
1253 | TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (p)) = 1; | |
73aea290 | 1254 | if (!DECL_EXTERNAL (p) |
71113fcd GK |
1255 | && !DECL_INITIAL (p) |
1256 | && scope != file_scope | |
1257 | && scope != external_scope) | |
73aea290 | 1258 | { |
dee15844 | 1259 | error ("nested function %q+D declared but never defined", p); |
73aea290 JM |
1260 | undef_nested_function = true; |
1261 | } | |
71113fcd GK |
1262 | else if (DECL_DECLARED_INLINE_P (p) |
1263 | && TREE_PUBLIC (p) | |
d0728ae0 JJ |
1264 | && !DECL_INITIAL (p)) |
1265 | { | |
1266 | /* C99 6.7.4p6: "a function with external linkage... declared | |
1267 | with an inline function specifier ... shall also be defined | |
1268 | in the same translation unit." */ | |
6bc8a126 | 1269 | if (!flag_gnu89_inline |
1bc5a451 MP |
1270 | && !lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (p)) |
1271 | && scope != external_scope) | |
d0728ae0 JJ |
1272 | pedwarn (input_location, 0, |
1273 | "inline function %q+D declared but never defined", p); | |
1274 | DECL_EXTERNAL (p) = 1; | |
1275 | } | |
71113fcd | 1276 | |
f75fbaf7 | 1277 | goto common_symbol; |
f91f41b2 ZW |
1278 | |
1279 | case VAR_DECL: | |
caf93cb0 | 1280 | /* Warnings for unused variables. */ |
ebfbbdc5 | 1281 | if ((!TREE_USED (p) || !DECL_READ_P (p)) |
f95f80d1 | 1282 | && !TREE_NO_WARNING (p) |
f91f41b2 ZW |
1283 | && !DECL_IN_SYSTEM_HEADER (p) |
1284 | && DECL_NAME (p) | |
f75fbaf7 | 1285 | && !DECL_ARTIFICIAL (p) |
29128154 | 1286 | && scope != file_scope |
c22cacf3 | 1287 | && scope != external_scope) |
ebfbbdc5 JJ |
1288 | { |
1289 | if (!TREE_USED (p)) | |
1290 | warning (OPT_Wunused_variable, "unused variable %q+D", p); | |
1291 | else if (DECL_CONTEXT (p) == current_function_decl) | |
1292 | warning_at (DECL_SOURCE_LOCATION (p), | |
1293 | OPT_Wunused_but_set_variable, | |
1294 | "variable %qD set but not used", p); | |
1295 | } | |
f75fbaf7 | 1296 | |
0b410f0b JM |
1297 | if (b->inner_comp) |
1298 | { | |
dee15844 JM |
1299 | error ("type of array %q+D completed incompatibly with" |
1300 | " implicit initialization", p); | |
0b410f0b JM |
1301 | } |
1302 | ||
a1105617 | 1303 | /* Fall through. */ |
f75fbaf7 ZW |
1304 | case TYPE_DECL: |
1305 | case CONST_DECL: | |
1306 | common_symbol: | |
1307 | /* All of these go in BLOCK_VARS, but only if this is the | |
1308 | binding in the home scope. */ | |
9aaabf8a | 1309 | if (!b->nested) |
f75fbaf7 | 1310 | { |
910ad8de | 1311 | DECL_CHAIN (p) = BLOCK_VARS (block); |
f75fbaf7 ZW |
1312 | BLOCK_VARS (block) = p; |
1313 | } | |
17fe0fdb | 1314 | else if (VAR_OR_FUNCTION_DECL_P (p) && scope != file_scope) |
b3f27c15 JJ |
1315 | { |
1316 | /* For block local externs add a special | |
1317 | DECL_EXTERNAL decl for debug info generation. */ | |
1318 | tree extp = copy_node (p); | |
1319 | ||
1320 | DECL_EXTERNAL (extp) = 1; | |
1321 | TREE_STATIC (extp) = 0; | |
1322 | TREE_PUBLIC (extp) = 1; | |
1323 | DECL_INITIAL (extp) = NULL_TREE; | |
1324 | DECL_LANG_SPECIFIC (extp) = NULL; | |
1325 | DECL_CONTEXT (extp) = current_function_decl; | |
1326 | if (TREE_CODE (p) == FUNCTION_DECL) | |
1327 | { | |
1328 | DECL_RESULT (extp) = NULL_TREE; | |
1329 | DECL_SAVED_TREE (extp) = NULL_TREE; | |
1330 | DECL_STRUCT_FUNCTION (extp) = NULL; | |
1331 | } | |
1332 | if (b->locus != UNKNOWN_LOCATION) | |
1333 | DECL_SOURCE_LOCATION (extp) = b->locus; | |
910ad8de | 1334 | DECL_CHAIN (extp) = BLOCK_VARS (block); |
b3f27c15 JJ |
1335 | BLOCK_VARS (block) = extp; |
1336 | } | |
116f30c3 RG |
1337 | /* If this is the file scope set DECL_CONTEXT of each decl to |
1338 | the TRANSLATION_UNIT_DECL. This makes same_translation_unit_p | |
1339 | work. */ | |
1340 | if (scope == file_scope) | |
9affb2c7 ZW |
1341 | { |
1342 | DECL_CONTEXT (p) = context; | |
116f30c3 RG |
1343 | if (TREE_CODE (p) == TYPE_DECL |
1344 | && TREE_TYPE (p) != error_mark_node) | |
9affb2c7 ZW |
1345 | set_type_context (TREE_TYPE (p), context); |
1346 | } | |
55d54003 | 1347 | |
81fea426 | 1348 | gcc_fallthrough (); |
f75fbaf7 ZW |
1349 | /* Parameters go in DECL_ARGUMENTS, not BLOCK_VARS, and have |
1350 | already been put there by store_parm_decls. Unused- | |
1351 | parameter warnings are handled by function.c. | |
1352 | error_mark_node obviously does not go in BLOCK_VARS and | |
1353 | does not get unused-variable warnings. */ | |
1354 | case PARM_DECL: | |
1355 | case ERROR_MARK: | |
1356 | /* It is possible for a decl not to have a name. We get | |
1357 | here with b->id NULL in this case. */ | |
1358 | if (b->id) | |
f91f41b2 | 1359 | { |
366de0ce | 1360 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 | 1361 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
e1b7793c ILT |
1362 | if (b->shadowed && b->shadowed->u.type) |
1363 | TREE_TYPE (b->shadowed->decl) = b->shadowed->u.type; | |
f91f41b2 ZW |
1364 | } |
1365 | break; | |
f75fbaf7 ZW |
1366 | |
1367 | default: | |
366de0ce | 1368 | gcc_unreachable (); |
f91f41b2 ZW |
1369 | } |
1370 | } | |
339a28b9 | 1371 | |
118a3a8b | 1372 | |
f75fbaf7 ZW |
1373 | /* Dispose of the block that we just made inside some higher level. */ |
1374 | if ((scope->function_body || scope == file_scope) && context) | |
339a28b9 | 1375 | { |
f75fbaf7 ZW |
1376 | DECL_INITIAL (context) = block; |
1377 | BLOCK_SUPERCONTEXT (block) = context; | |
339a28b9 | 1378 | } |
f91f41b2 | 1379 | else if (scope->outer) |
3bf40d18 | 1380 | { |
f91f41b2 ZW |
1381 | if (block) |
1382 | SCOPE_LIST_APPEND (scope->outer, blocks, block); | |
1383 | /* If we did not make a block for the scope just exited, any | |
1384 | blocks made for inner scopes must be carried forward so they | |
1385 | will later become subblocks of something else. */ | |
1386 | else if (scope->blocks) | |
1387 | SCOPE_LIST_CONCAT (scope->outer, blocks, scope, blocks); | |
3bf40d18 | 1388 | } |
51e29401 | 1389 | |
f8521984 | 1390 | /* Pop the current scope, and free the structure for reuse. */ |
f75fbaf7 ZW |
1391 | current_scope = scope->outer; |
1392 | if (scope->function_body) | |
1393 | current_function_scope = scope->outer_function; | |
1394 | ||
1395 | memset (scope, 0, sizeof (struct c_scope)); | |
1396 | scope->outer = scope_freelist; | |
1397 | scope_freelist = scope; | |
51e29401 | 1398 | |
51e29401 RS |
1399 | return block; |
1400 | } | |
3bf40d18 | 1401 | |
f75fbaf7 ZW |
1402 | void |
1403 | push_file_scope (void) | |
1404 | { | |
1405 | tree decl; | |
f75fbaf7 | 1406 | |
f6bf7bb6 AP |
1407 | if (file_scope) |
1408 | return; | |
1409 | ||
f75fbaf7 ZW |
1410 | push_scope (); |
1411 | file_scope = current_scope; | |
1412 | ||
1413 | start_fname_decls (); | |
1414 | ||
910ad8de | 1415 | for (decl = visible_builtins; decl; decl = DECL_CHAIN (decl)) |
9aaabf8a | 1416 | bind (DECL_NAME (decl), decl, file_scope, |
b3f27c15 | 1417 | /*invisible=*/false, /*nested=*/true, DECL_SOURCE_LOCATION (decl)); |
f75fbaf7 ZW |
1418 | } |
1419 | ||
1420 | void | |
1421 | pop_file_scope (void) | |
1422 | { | |
1423 | /* In case there were missing closebraces, get us back to the global | |
1424 | binding level. */ | |
1425 | while (current_scope != file_scope) | |
1426 | pop_scope (); | |
1427 | ||
1428 | /* __FUNCTION__ is defined at file scope (""). This | |
1429 | call may not be necessary as my tests indicate it | |
1430 | still works without it. */ | |
1431 | finish_fname_decls (); | |
1432 | ||
991d6621 JM |
1433 | check_inline_statics (); |
1434 | ||
36c1b0de ZW |
1435 | /* This is the point to write out a PCH if we're doing that. |
1436 | In that case we do not want to do anything else. */ | |
f75fbaf7 | 1437 | if (pch_file) |
36c1b0de ZW |
1438 | { |
1439 | c_common_write_pch (); | |
6b5b4e9c JJ |
1440 | /* Ensure even the callers don't try to finalize the CU. */ |
1441 | flag_syntax_only = 1; | |
36c1b0de ZW |
1442 | return; |
1443 | } | |
f75fbaf7 | 1444 | |
36c1b0de | 1445 | /* Pop off the file scope and close this translation unit. */ |
f75fbaf7 ZW |
1446 | pop_scope (); |
1447 | file_scope = 0; | |
bedb9fc0 RH |
1448 | |
1449 | maybe_apply_pending_pragma_weaks (); | |
f75fbaf7 | 1450 | } |
e1b7793c ILT |
1451 | \f |
1452 | /* Adjust the bindings for the start of a statement expression. */ | |
1453 | ||
1454 | void | |
1455 | c_bindings_start_stmt_expr (struct c_spot_bindings* switch_bindings) | |
1456 | { | |
1457 | struct c_scope *scope; | |
1458 | ||
1459 | for (scope = current_scope; scope != NULL; scope = scope->outer) | |
1460 | { | |
1461 | struct c_binding *b; | |
1462 | ||
1463 | if (!scope->has_label_bindings) | |
1464 | continue; | |
1465 | ||
1466 | for (b = scope->bindings; b != NULL; b = b->prev) | |
1467 | { | |
1468 | struct c_label_vars *label_vars; | |
1469 | unsigned int ix; | |
1470 | struct c_goto_bindings *g; | |
1471 | ||
1472 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1473 | continue; | |
1474 | label_vars = b->u.label; | |
1475 | ++label_vars->label_bindings.stmt_exprs; | |
9771b263 | 1476 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1477 | ++g->goto_bindings.stmt_exprs; |
1478 | } | |
1479 | } | |
1480 | ||
1481 | if (switch_bindings != NULL) | |
1482 | ++switch_bindings->stmt_exprs; | |
1483 | } | |
1484 | ||
1485 | /* Adjust the bindings for the end of a statement expression. */ | |
1486 | ||
1487 | void | |
1488 | c_bindings_end_stmt_expr (struct c_spot_bindings *switch_bindings) | |
1489 | { | |
1490 | struct c_scope *scope; | |
1491 | ||
1492 | for (scope = current_scope; scope != NULL; scope = scope->outer) | |
1493 | { | |
1494 | struct c_binding *b; | |
1495 | ||
1496 | if (!scope->has_label_bindings) | |
1497 | continue; | |
1498 | ||
1499 | for (b = scope->bindings; b != NULL; b = b->prev) | |
1500 | { | |
1501 | struct c_label_vars *label_vars; | |
1502 | unsigned int ix; | |
1503 | struct c_goto_bindings *g; | |
1504 | ||
1505 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1506 | continue; | |
1507 | label_vars = b->u.label; | |
1508 | --label_vars->label_bindings.stmt_exprs; | |
1509 | if (label_vars->label_bindings.stmt_exprs < 0) | |
1510 | { | |
1511 | label_vars->label_bindings.left_stmt_expr = true; | |
1512 | label_vars->label_bindings.stmt_exprs = 0; | |
1513 | } | |
9771b263 | 1514 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1515 | { |
1516 | --g->goto_bindings.stmt_exprs; | |
1517 | if (g->goto_bindings.stmt_exprs < 0) | |
1518 | { | |
1519 | g->goto_bindings.left_stmt_expr = true; | |
1520 | g->goto_bindings.stmt_exprs = 0; | |
1521 | } | |
1522 | } | |
1523 | } | |
1524 | } | |
f75fbaf7 | 1525 | |
e1b7793c ILT |
1526 | if (switch_bindings != NULL) |
1527 | { | |
1528 | --switch_bindings->stmt_exprs; | |
1529 | gcc_assert (switch_bindings->stmt_exprs >= 0); | |
1530 | } | |
1531 | } | |
51e29401 | 1532 | \f |
51e29401 RS |
1533 | /* Push a definition or a declaration of struct, union or enum tag "name". |
1534 | "type" should be the type node. | |
c2255bc4 AH |
1535 | We assume that the tag "name" is not already defined, and has a location |
1536 | of LOC. | |
51e29401 RS |
1537 | |
1538 | Note that the definition may really be just a forward reference. | |
1539 | In that case, the TYPE_SIZE will be zero. */ | |
1540 | ||
f75fbaf7 | 1541 | static void |
c2255bc4 | 1542 | pushtag (location_t loc, tree name, tree type) |
51e29401 | 1543 | { |
14077d68 | 1544 | /* Record the identifier as the type's name if it has none. */ |
f75fbaf7 ZW |
1545 | if (name && !TYPE_NAME (type)) |
1546 | TYPE_NAME (type) = name; | |
24b97832 | 1547 | bind (name, type, current_scope, /*invisible=*/false, /*nested=*/false, loc); |
c138f328 | 1548 | |
51e29401 | 1549 | /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE will be the |
f8521984 | 1550 | tagged type we just added to the current scope. This fake |
51e29401 | 1551 | NULL-named TYPE_DECL node helps dwarfout.c to know when it needs |
858a47b1 | 1552 | to output a representation of a tagged type, and it also gives |
51e29401 RS |
1553 | us a convenient place to record the "scope start" address for the |
1554 | tagged type. */ | |
1555 | ||
c2255bc4 AH |
1556 | TYPE_STUB_DECL (type) = pushdecl (build_decl (loc, |
1557 | TYPE_DECL, NULL_TREE, type)); | |
88dad228 JM |
1558 | |
1559 | /* An approximation for now, so we can tell this is a function-scope tag. | |
f75fbaf7 | 1560 | This will be updated in pop_scope. */ |
88dad228 | 1561 | TYPE_CONTEXT (type) = DECL_CONTEXT (TYPE_STUB_DECL (type)); |
7e5487a2 ILT |
1562 | |
1563 | if (warn_cxx_compat && name != NULL_TREE) | |
1564 | { | |
1565 | struct c_binding *b = I_SYMBOL_BINDING (name); | |
1566 | ||
1567 | if (b != NULL | |
1568 | && b->decl != NULL_TREE | |
1569 | && TREE_CODE (b->decl) == TYPE_DECL | |
1570 | && (B_IN_CURRENT_SCOPE (b) | |
1571 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
1572 | && (TYPE_MAIN_VARIANT (TREE_TYPE (b->decl)) | |
1573 | != TYPE_MAIN_VARIANT (type))) | |
1574 | { | |
097f82ec | 1575 | auto_diagnostic_group d; |
bb85aa74 MP |
1576 | if (warning_at (loc, OPT_Wc___compat, |
1577 | ("using %qD as both a typedef and a tag is " | |
1578 | "invalid in C++"), b->decl) | |
1579 | && b->locus != UNKNOWN_LOCATION) | |
7e5487a2 ILT |
1580 | inform (b->locus, "originally defined here"); |
1581 | } | |
1582 | } | |
51e29401 | 1583 | } |
ddc8de03 PM |
1584 | |
1585 | /* An exported interface to pushtag. This is used by the gdb plugin's | |
1586 | binding oracle to introduce a new tag binding. */ | |
1587 | ||
1588 | void | |
1589 | c_pushtag (location_t loc, tree name, tree type) | |
1590 | { | |
1591 | pushtag (loc, name, type); | |
1592 | } | |
1593 | ||
1594 | /* An exported interface to bind a declaration. LOC is the location | |
1595 | to use. DECL is the declaration to bind. The decl's name is used | |
1596 | to determine how it is bound. If DECL is a VAR_DECL, then | |
1597 | IS_GLOBAL determines whether the decl is put into the global (file | |
1598 | and external) scope or the current function's scope; if DECL is not | |
1599 | a VAR_DECL then it is always put into the file scope. */ | |
1600 | ||
1601 | void | |
1602 | c_bind (location_t loc, tree decl, bool is_global) | |
1603 | { | |
1604 | struct c_scope *scope; | |
1605 | bool nested = false; | |
1606 | ||
0ae9bd27 | 1607 | if (!VAR_P (decl) || current_function_scope == NULL) |
ddc8de03 PM |
1608 | { |
1609 | /* Types and functions are always considered to be global. */ | |
1610 | scope = file_scope; | |
1611 | DECL_EXTERNAL (decl) = 1; | |
1612 | TREE_PUBLIC (decl) = 1; | |
1613 | } | |
1614 | else if (is_global) | |
1615 | { | |
1616 | /* Also bind it into the external scope. */ | |
1617 | bind (DECL_NAME (decl), decl, external_scope, true, false, loc); | |
1618 | nested = true; | |
1619 | scope = file_scope; | |
1620 | DECL_EXTERNAL (decl) = 1; | |
1621 | TREE_PUBLIC (decl) = 1; | |
1622 | } | |
1623 | else | |
1624 | { | |
1625 | DECL_CONTEXT (decl) = current_function_decl; | |
1626 | TREE_PUBLIC (decl) = 0; | |
1627 | scope = current_function_scope; | |
1628 | } | |
1629 | ||
1630 | bind (DECL_NAME (decl), decl, scope, false, nested, loc); | |
1631 | } | |
51e29401 | 1632 | \f |
3c6e6fbf | 1633 | /* Subroutine of compare_decls. Allow harmless mismatches in return |
6907ddd3 RS |
1634 | and argument types provided that the type modes match. This function |
1635 | return a unified type given a suitable match, and 0 otherwise. */ | |
1636 | ||
1637 | static tree | |
3c6e6fbf | 1638 | match_builtin_function_types (tree newtype, tree oldtype) |
6907ddd3 RS |
1639 | { |
1640 | tree newrettype, oldrettype; | |
1641 | tree newargs, oldargs; | |
1642 | tree trytype, tryargs; | |
1643 | ||
1644 | /* Accept the return type of the new declaration if same modes. */ | |
1645 | oldrettype = TREE_TYPE (oldtype); | |
1646 | newrettype = TREE_TYPE (newtype); | |
1647 | ||
1648 | if (TYPE_MODE (oldrettype) != TYPE_MODE (newrettype)) | |
6574d78e | 1649 | return NULL_TREE; |
6907ddd3 RS |
1650 | |
1651 | oldargs = TYPE_ARG_TYPES (oldtype); | |
1652 | newargs = TYPE_ARG_TYPES (newtype); | |
1653 | tryargs = newargs; | |
1654 | ||
1655 | while (oldargs || newargs) | |
1656 | { | |
3f75a254 JM |
1657 | if (!oldargs |
1658 | || !newargs | |
1659 | || !TREE_VALUE (oldargs) | |
1660 | || !TREE_VALUE (newargs) | |
6907ddd3 RS |
1661 | || TYPE_MODE (TREE_VALUE (oldargs)) |
1662 | != TYPE_MODE (TREE_VALUE (newargs))) | |
6574d78e | 1663 | return NULL_TREE; |
6907ddd3 RS |
1664 | |
1665 | oldargs = TREE_CHAIN (oldargs); | |
1666 | newargs = TREE_CHAIN (newargs); | |
1667 | } | |
1668 | ||
1669 | trytype = build_function_type (newrettype, tryargs); | |
b8fd7909 JM |
1670 | |
1671 | /* Allow declaration to change transaction_safe attribute. */ | |
1672 | tree oldattrs = TYPE_ATTRIBUTES (oldtype); | |
1673 | tree oldtsafe = lookup_attribute ("transaction_safe", oldattrs); | |
1674 | tree newattrs = TYPE_ATTRIBUTES (newtype); | |
1675 | tree newtsafe = lookup_attribute ("transaction_safe", newattrs); | |
1676 | if (oldtsafe && !newtsafe) | |
1677 | oldattrs = remove_attribute ("transaction_safe", oldattrs); | |
1678 | else if (newtsafe && !oldtsafe) | |
1679 | oldattrs = tree_cons (get_identifier ("transaction_safe"), | |
1680 | NULL_TREE, oldattrs); | |
1681 | ||
1682 | return build_type_attribute_variant (trytype, oldattrs); | |
6907ddd3 RS |
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)) |
3fa8871b MP |
1696 | || !((!prototype_p (oldtype) && DECL_INITIAL (olddecl) == NULL_TREE) |
1697 | || (!prototype_p (newtype) && DECL_INITIAL (newdecl) == NULL_TREE))) | |
3c6e6fbf | 1698 | return; |
bf44f7de | 1699 | |
3c6e6fbf | 1700 | t = TYPE_ARG_TYPES (oldtype); |
3fa8871b | 1701 | if (t == NULL_TREE) |
3c6e6fbf ZW |
1702 | t = TYPE_ARG_TYPES (newtype); |
1703 | for (; t; t = TREE_CHAIN (t)) | |
1704 | { | |
1705 | tree type = TREE_VALUE (t); | |
51e29401 | 1706 | |
3fa8871b | 1707 | if (TREE_CHAIN (t) == NULL_TREE |
3c6e6fbf ZW |
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 | { |
3d78e008 | 1804 | if (TREE_CODE (decl) == FUNCTION_DECL && fndecl_built_in_p (decl) |
0c249d4b | 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; | |
f8f5c4b3 | 1828 | bool retval = true; |
3c6e6fbf | 1829 | |
6663ee3b EC |
1830 | #define DECL_EXTERN_INLINE(DECL) (DECL_DECLARED_INLINE_P (DECL) \ |
1831 | && DECL_EXTERNAL (DECL)) | |
1832 | ||
3c6e6fbf ZW |
1833 | /* If we have error_mark_node for either decl or type, just discard |
1834 | the previous decl - we're in an error cascade already. */ | |
1835 | if (olddecl == error_mark_node || newdecl == error_mark_node) | |
1836 | return false; | |
bc298aa7 ZW |
1837 | *oldtypep = oldtype = TREE_TYPE (olddecl); |
1838 | *newtypep = newtype = TREE_TYPE (newdecl); | |
3c6e6fbf ZW |
1839 | if (oldtype == error_mark_node || newtype == error_mark_node) |
1840 | return false; | |
1841 | ||
1842 | /* Two different categories of symbol altogether. This is an error | |
1843 | unless OLDDECL is a builtin. OLDDECL will be discarded in any case. */ | |
51e29401 RS |
1844 | if (TREE_CODE (olddecl) != TREE_CODE (newdecl)) |
1845 | { | |
f75fbaf7 | 1846 | if (!(TREE_CODE (olddecl) == FUNCTION_DECL |
3d78e008 | 1847 | && fndecl_built_in_p (olddecl) |
f75fbaf7 | 1848 | && !C_DECL_DECLARED_BUILTIN (olddecl))) |
51e29401 | 1849 | { |
097f82ec | 1850 | auto_diagnostic_group d; |
dee15844 | 1851 | error ("%q+D redeclared as different kind of symbol", newdecl); |
71205d17 | 1852 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
1853 | } |
1854 | else if (TREE_PUBLIC (newdecl)) | |
ff1ff960 PC |
1855 | warning (OPT_Wbuiltin_declaration_mismatch, |
1856 | "built-in function %q+D declared as non-function", | |
dee15844 | 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 | { | |
097f82ec | 1868 | auto_diagnostic_group d; |
dee15844 | 1869 | error ("redeclaration of enumerator %q+D", newdecl); |
71205d17 | 1870 | locate_old_decl (olddecl); |
085e33aa JM |
1871 | return false; |
1872 | } | |
1873 | ||
097f82ec DM |
1874 | bool pedwarned = false; |
1875 | bool warned = false; | |
1876 | auto_diagnostic_group d; | |
1877 | ||
132da1a5 | 1878 | if (!comptypes (oldtype, newtype)) |
3c6e6fbf | 1879 | { |
a6f78652 | 1880 | if (TREE_CODE (olddecl) == FUNCTION_DECL |
3d78e008 | 1881 | && fndecl_built_in_p (olddecl) && !C_DECL_DECLARED_BUILTIN (olddecl)) |
3c6e6fbf ZW |
1882 | { |
1883 | /* Accept harmless mismatch in function types. | |
1884 | This is for the ffs and fprintf builtins. */ | |
1885 | tree trytype = match_builtin_function_types (newtype, oldtype); | |
1886 | ||
132da1a5 | 1887 | if (trytype && comptypes (newtype, trytype)) |
bc298aa7 | 1888 | *oldtypep = oldtype = trytype; |
3c6e6fbf | 1889 | else |
51e29401 | 1890 | { |
cd5da983 MS |
1891 | const char *header |
1892 | = header_for_builtin_fn (DECL_FUNCTION_CODE (olddecl)); | |
1893 | location_t loc = DECL_SOURCE_LOCATION (newdecl); | |
1894 | if (warning_at (loc, OPT_Wbuiltin_declaration_mismatch, | |
1895 | "conflicting types for built-in function %q+D; " | |
1896 | "expected %qT", | |
1897 | newdecl, oldtype) | |
1898 | && header) | |
1899 | { | |
1900 | /* Suggest the right header to include as the preferred | |
1901 | solution rather than the spelling of the declaration. */ | |
1902 | rich_location richloc (line_table, loc); | |
1903 | maybe_add_include_fixit (&richloc, header, true); | |
1904 | inform (&richloc, | |
1905 | "%qD is declared in header %qs", olddecl, header); | |
1906 | } | |
3c6e6fbf ZW |
1907 | /* If types don't match for a built-in, throw away the |
1908 | built-in. No point in calling locate_old_decl here, it | |
9ac97460 | 1909 | won't print anything. */ |
3c6e6fbf | 1910 | return false; |
51e29401 | 1911 | } |
3c6e6fbf ZW |
1912 | } |
1913 | else if (TREE_CODE (olddecl) == FUNCTION_DECL | |
3c20847b | 1914 | && DECL_IS_BUILTIN (olddecl)) |
3c6e6fbf ZW |
1915 | { |
1916 | /* A conflicting function declaration for a predeclared | |
1917 | function that isn't actually built in. Objective C uses | |
1918 | these. The new declaration silently overrides everything | |
1919 | but the volatility (i.e. noreturn) indication. See also | |
1920 | below. FIXME: Make Objective C use normal builtins. */ | |
1921 | TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl); | |
1922 | return false; | |
1923 | } | |
1924 | /* Permit void foo (...) to match int foo (...) if the latter is | |
1925 | the definition and implicit int was used. See | |
1926 | c-torture/compile/920625-2.c. */ | |
1927 | else if (TREE_CODE (newdecl) == FUNCTION_DECL && DECL_INITIAL (newdecl) | |
1928 | && TYPE_MAIN_VARIANT (TREE_TYPE (oldtype)) == void_type_node | |
1929 | && TYPE_MAIN_VARIANT (TREE_TYPE (newtype)) == integer_type_node | |
12869142 | 1930 | && C_FUNCTION_IMPLICIT_INT (newdecl) && !DECL_INITIAL (olddecl)) |
3c6e6fbf | 1931 | { |
509c9d60 MLI |
1932 | pedwarned = pedwarn (input_location, 0, |
1933 | "conflicting types for %q+D", newdecl); | |
3c6e6fbf | 1934 | /* Make sure we keep void as the return type. */ |
bc298aa7 | 1935 | TREE_TYPE (newdecl) = *newtypep = newtype = oldtype; |
3c6e6fbf | 1936 | C_FUNCTION_IMPLICIT_INT (newdecl) = 0; |
51e29401 | 1937 | } |
12869142 DJ |
1938 | /* Permit void foo (...) to match an earlier call to foo (...) with |
1939 | no declared type (thus, implicitly int). */ | |
1940 | else if (TREE_CODE (newdecl) == FUNCTION_DECL | |
1941 | && TYPE_MAIN_VARIANT (TREE_TYPE (newtype)) == void_type_node | |
1942 | && TYPE_MAIN_VARIANT (TREE_TYPE (oldtype)) == integer_type_node | |
1943 | && C_DECL_IMPLICIT (olddecl) && !DECL_INITIAL (olddecl)) | |
1944 | { | |
509c9d60 MLI |
1945 | pedwarned = pedwarn (input_location, 0, |
1946 | "conflicting types for %q+D", newdecl); | |
12869142 DJ |
1947 | /* Make sure we keep void as the return type. */ |
1948 | TREE_TYPE (olddecl) = *oldtypep = oldtype = newtype; | |
12869142 | 1949 | } |
51e29401 RS |
1950 | else |
1951 | { | |
36c5e70a BE |
1952 | int new_quals = TYPE_QUALS (newtype); |
1953 | int old_quals = TYPE_QUALS (oldtype); | |
1954 | ||
1955 | if (new_quals != old_quals) | |
1956 | { | |
1957 | addr_space_t new_addr = DECODE_QUAL_ADDR_SPACE (new_quals); | |
1958 | addr_space_t old_addr = DECODE_QUAL_ADDR_SPACE (old_quals); | |
1959 | if (new_addr != old_addr) | |
1960 | { | |
1961 | if (ADDR_SPACE_GENERIC_P (new_addr)) | |
1962 | error ("conflicting named address spaces (generic vs %s) " | |
1963 | "for %q+D", | |
1964 | c_addr_space_name (old_addr), newdecl); | |
1965 | else if (ADDR_SPACE_GENERIC_P (old_addr)) | |
1966 | error ("conflicting named address spaces (%s vs generic) " | |
1967 | "for %q+D", | |
1968 | c_addr_space_name (new_addr), newdecl); | |
1969 | else | |
1970 | error ("conflicting named address spaces (%s vs %s) " | |
1971 | "for %q+D", | |
1972 | c_addr_space_name (new_addr), | |
1973 | c_addr_space_name (old_addr), | |
1974 | newdecl); | |
1975 | } | |
1976 | ||
1977 | if (CLEAR_QUAL_ADDR_SPACE (new_quals) | |
1978 | != CLEAR_QUAL_ADDR_SPACE (old_quals)) | |
1979 | error ("conflicting type qualifiers for %q+D", newdecl); | |
1980 | } | |
118a3a8b | 1981 | else |
dee15844 | 1982 | error ("conflicting types for %q+D", newdecl); |
3c6e6fbf | 1983 | diagnose_arglist_conflict (newdecl, olddecl, newtype, oldtype); |
71205d17 | 1984 | locate_old_decl (olddecl); |
3c6e6fbf | 1985 | return false; |
51e29401 | 1986 | } |
51e29401 RS |
1987 | } |
1988 | ||
3c6e6fbf ZW |
1989 | /* Redeclaration of a type is a constraint violation (6.7.2.3p1), |
1990 | but silently ignore the redeclaration if either is in a system | |
dc5027f4 | 1991 | header. (Conflicting redeclarations were handled above.) This |
48b0b196 | 1992 | is allowed for C11 if the types are the same, not just |
dc5027f4 | 1993 | compatible. */ |
3c6e6fbf | 1994 | if (TREE_CODE (newdecl) == TYPE_DECL) |
339a28b9 | 1995 | { |
dc5027f4 JM |
1996 | bool types_different = false; |
1997 | int comptypes_result; | |
1998 | ||
1999 | comptypes_result | |
2000 | = comptypes_check_different_types (oldtype, newtype, &types_different); | |
2001 | ||
2002 | if (comptypes_result != 1 || types_different) | |
2003 | { | |
2004 | error ("redefinition of typedef %q+D with different type", newdecl); | |
2005 | locate_old_decl (olddecl); | |
2006 | return false; | |
2007 | } | |
2008 | ||
df0ed6c5 RAE |
2009 | if (DECL_IN_SYSTEM_HEADER (newdecl) |
2010 | || DECL_IN_SYSTEM_HEADER (olddecl) | |
2011 | || TREE_NO_WARNING (newdecl) | |
2012 | || TREE_NO_WARNING (olddecl)) | |
a1105617 | 2013 | return true; /* Allow OLDDECL to continue in use. */ |
118a3a8b | 2014 | |
8bf872f9 | 2015 | if (variably_modified_type_p (newtype, NULL)) |
dc5027f4 | 2016 | { |
8bf872f9 JM |
2017 | error ("redefinition of typedef %q+D with variably modified type", |
2018 | newdecl); | |
dc5027f4 JM |
2019 | locate_old_decl (olddecl); |
2020 | } | |
35aff4fb MP |
2021 | else if (pedwarn_c99 (input_location, OPT_Wpedantic, |
2022 | "redefinition of typedef %q+D", newdecl)) | |
2023 | locate_old_decl (olddecl); | |
dc5027f4 JM |
2024 | |
2025 | return true; | |
339a28b9 | 2026 | } |
51e29401 | 2027 | |
3c6e6fbf ZW |
2028 | /* Function declarations can either be 'static' or 'extern' (no |
2029 | qualifier is equivalent to 'extern' - C99 6.2.2p5) and therefore | |
71113fcd GK |
2030 | can never conflict with each other on account of linkage |
2031 | (6.2.2p4). Multiple definitions are not allowed (6.9p3,5) but | |
2032 | gnu89 mode permits two definitions if one is 'extern inline' and | |
2033 | one is not. The non- extern-inline definition supersedes the | |
2034 | extern-inline definition. */ | |
6663ee3b | 2035 | |
3c6e6fbf | 2036 | else if (TREE_CODE (newdecl) == FUNCTION_DECL) |
51e29401 | 2037 | { |
04b8f97f ZW |
2038 | /* If you declare a built-in function name as static, or |
2039 | define the built-in with an old-style definition (so we | |
2040 | can't validate the argument list) the built-in definition is | |
2041 | overridden, but optionally warn this was a bad choice of name. */ | |
3d78e008 | 2042 | if (fndecl_built_in_p (olddecl) |
cd5da983 | 2043 | && !C_DECL_DECLARED_BUILTIN (olddecl)) |
51e29401 | 2044 | { |
cd5da983 MS |
2045 | if (!TREE_PUBLIC (newdecl) |
2046 | || (DECL_INITIAL (newdecl) | |
2047 | && !prototype_p (TREE_TYPE (newdecl)))) | |
2048 | { | |
2049 | warning_at (DECL_SOURCE_LOCATION (newdecl), | |
2050 | OPT_Wshadow, "declaration of %qD shadows " | |
2051 | "a built-in function", newdecl); | |
2052 | /* Discard the old built-in function. */ | |
2053 | return false; | |
2054 | } | |
2055 | ||
2056 | if (!prototype_p (TREE_TYPE (newdecl))) | |
2057 | { | |
2058 | /* Set for built-ins that take no arguments. */ | |
2059 | bool func_void_args = false; | |
2060 | if (tree at = TYPE_ARG_TYPES (oldtype)) | |
2061 | func_void_args = VOID_TYPE_P (TREE_VALUE (at)); | |
2062 | ||
2063 | if (extra_warnings && !func_void_args) | |
2064 | warning_at (DECL_SOURCE_LOCATION (newdecl), | |
2065 | OPT_Wbuiltin_declaration_mismatch, | |
2066 | "declaration of built-in function %qD without " | |
2067 | "a prototype; expected %qT", | |
2068 | newdecl, TREE_TYPE (olddecl)); | |
2069 | } | |
51e29401 | 2070 | } |
118a3a8b | 2071 | |
3c6e6fbf | 2072 | if (DECL_INITIAL (newdecl)) |
4c41bbfa | 2073 | { |
f8f5c4b3 | 2074 | if (DECL_INITIAL (olddecl)) |
6907ddd3 | 2075 | { |
6663ee3b | 2076 | /* If both decls are in the same TU and the new declaration |
619519c8 | 2077 | isn't overriding an extern inline reject the new decl. |
71113fcd GK |
2078 | In c99, no overriding is allowed in the same translation |
2079 | unit. */ | |
2080 | if ((!DECL_EXTERN_INLINE (olddecl) | |
2081 | || DECL_EXTERN_INLINE (newdecl) | |
da1c7394 | 2082 | || (!flag_gnu89_inline |
4eb7fd83 JJ |
2083 | && (!DECL_DECLARED_INLINE_P (olddecl) |
2084 | || !lookup_attribute ("gnu_inline", | |
2085 | DECL_ATTRIBUTES (olddecl))) | |
2086 | && (!DECL_DECLARED_INLINE_P (newdecl) | |
2087 | || !lookup_attribute ("gnu_inline", | |
2088 | DECL_ATTRIBUTES (newdecl)))) | |
4eb7fd83 | 2089 | ) |
f8f5c4b3 AP |
2090 | && same_translation_unit_p (newdecl, olddecl)) |
2091 | { | |
097f82ec | 2092 | auto_diagnostic_group d; |
dee15844 | 2093 | error ("redefinition of %q+D", newdecl); |
71205d17 | 2094 | locate_old_decl (olddecl); |
f8f5c4b3 AP |
2095 | return false; |
2096 | } | |
6663ee3b | 2097 | } |
4c41bbfa | 2098 | } |
3c6e6fbf ZW |
2099 | /* If we have a prototype after an old-style function definition, |
2100 | the argument types must be checked specially. */ | |
2101 | else if (DECL_INITIAL (olddecl) | |
f4da8dce | 2102 | && !prototype_p (oldtype) && prototype_p (newtype) |
097f82ec | 2103 | && TYPE_ACTUAL_ARG_TYPES (oldtype)) |
52b6a22f | 2104 | { |
097f82ec DM |
2105 | auto_diagnostic_group d; |
2106 | if (!validate_proto_after_old_defn (newdecl, newtype, oldtype)) | |
2107 | { | |
2108 | locate_old_decl (olddecl); | |
2109 | return false; | |
2110 | } | |
52b6a22f | 2111 | } |
9aaabf8a ZW |
2112 | /* A non-static declaration (even an "extern") followed by a |
2113 | static declaration is undefined behavior per C99 6.2.2p3-5,7. | |
2114 | The same is true for a static forward declaration at block | |
2115 | scope followed by a non-static declaration/definition at file | |
2116 | scope. Static followed by non-static at the same scope is | |
2117 | not undefined behavior, and is the most convenient way to get | |
2118 | some effects (see e.g. what unwind-dw2-fde-glibc.c does to | |
2119 | the definition of _Unwind_Find_FDE in unwind-dw2-fde.c), but | |
8c27b7d4 | 2120 | we do diagnose it if -Wtraditional. */ |
3c6e6fbf | 2121 | if (TREE_PUBLIC (olddecl) && !TREE_PUBLIC (newdecl)) |
51e29401 | 2122 | { |
9aaabf8a ZW |
2123 | /* Two exceptions to the rule. If olddecl is an extern |
2124 | inline, or a predeclared function that isn't actually | |
2125 | built in, newdecl silently overrides olddecl. The latter | |
2126 | occur only in Objective C; see also above. (FIXME: Make | |
2127 | Objective C use normal builtins.) */ | |
2128 | if (!DECL_IS_BUILTIN (olddecl) | |
6663ee3b | 2129 | && !DECL_EXTERN_INLINE (olddecl)) |
3c6e6fbf | 2130 | { |
097f82ec | 2131 | auto_diagnostic_group d; |
dee15844 JM |
2132 | error ("static declaration of %q+D follows " |
2133 | "non-static declaration", newdecl); | |
71205d17 | 2134 | locate_old_decl (olddecl); |
3c6e6fbf | 2135 | } |
9aaabf8a | 2136 | return false; |
51e29401 | 2137 | } |
9aaabf8a | 2138 | else if (TREE_PUBLIC (newdecl) && !TREE_PUBLIC (olddecl)) |
e841f997 | 2139 | { |
9aaabf8a ZW |
2140 | if (DECL_CONTEXT (olddecl)) |
2141 | { | |
097f82ec | 2142 | auto_diagnostic_group d; |
dee15844 JM |
2143 | error ("non-static declaration of %q+D follows " |
2144 | "static declaration", newdecl); | |
71205d17 | 2145 | locate_old_decl (olddecl); |
9aaabf8a ZW |
2146 | return false; |
2147 | } | |
2148 | else if (warn_traditional) | |
2149 | { | |
b8698a0f | 2150 | warned |= warning (OPT_Wtraditional, |
71205d17 MLI |
2151 | "non-static declaration of %q+D " |
2152 | "follows static declaration", newdecl); | |
9aaabf8a | 2153 | } |
e841f997 | 2154 | } |
4eb7fd83 JJ |
2155 | |
2156 | /* Make sure gnu_inline attribute is either not present, or | |
2157 | present on all inline decls. */ | |
2158 | if (DECL_DECLARED_INLINE_P (olddecl) | |
2159 | && DECL_DECLARED_INLINE_P (newdecl)) | |
2160 | { | |
2161 | bool newa = lookup_attribute ("gnu_inline", | |
2162 | DECL_ATTRIBUTES (newdecl)) != NULL; | |
2163 | bool olda = lookup_attribute ("gnu_inline", | |
2164 | DECL_ATTRIBUTES (olddecl)) != NULL; | |
2165 | if (newa != olda) | |
2166 | { | |
097f82ec | 2167 | auto_diagnostic_group d; |
c5d75364 MLI |
2168 | error_at (input_location, "%<gnu_inline%> attribute present on %q+D", |
2169 | newa ? newdecl : olddecl); | |
2170 | error_at (DECL_SOURCE_LOCATION (newa ? olddecl : newdecl), | |
2171 | "but not here"); | |
4eb7fd83 JJ |
2172 | } |
2173 | } | |
51e29401 | 2174 | } |
0ae9bd27 | 2175 | else if (VAR_P (newdecl)) |
339a28b9 | 2176 | { |
3c6e6fbf ZW |
2177 | /* Only variables can be thread-local, and all declarations must |
2178 | agree on this property. */ | |
953ff289 DN |
2179 | if (C_DECL_THREADPRIVATE_P (olddecl) && !DECL_THREAD_LOCAL_P (newdecl)) |
2180 | { | |
2181 | /* Nothing to check. Since OLDDECL is marked threadprivate | |
2182 | and NEWDECL does not have a thread-local attribute, we | |
2183 | will merge the threadprivate attribute into NEWDECL. */ | |
2184 | ; | |
2185 | } | |
2186 | else if (DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)) | |
51e29401 | 2187 | { |
097f82ec | 2188 | auto_diagnostic_group d; |
c2f7fa15 | 2189 | if (DECL_THREAD_LOCAL_P (newdecl)) |
dee15844 JM |
2190 | error ("thread-local declaration of %q+D follows " |
2191 | "non-thread-local declaration", newdecl); | |
3c6e6fbf | 2192 | else |
dee15844 JM |
2193 | error ("non-thread-local declaration of %q+D follows " |
2194 | "thread-local declaration", newdecl); | |
51e29401 | 2195 | |
71205d17 | 2196 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
2197 | return false; |
2198 | } | |
51e29401 | 2199 | |
3c6e6fbf ZW |
2200 | /* Multiple initialized definitions are not allowed (6.9p3,5). */ |
2201 | if (DECL_INITIAL (newdecl) && DECL_INITIAL (olddecl)) | |
2202 | { | |
097f82ec | 2203 | auto_diagnostic_group d; |
dee15844 | 2204 | error ("redefinition of %q+D", newdecl); |
71205d17 | 2205 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
2206 | return false; |
2207 | } | |
2208 | ||
9aaabf8a ZW |
2209 | /* Objects declared at file scope: if the first declaration had |
2210 | external linkage (even if it was an external reference) the | |
2211 | second must have external linkage as well, or the behavior is | |
2212 | undefined. If the first declaration had internal linkage, then | |
2213 | the second must too, or else be an external reference (in which | |
2214 | case the composite declaration still has internal linkage). | |
2215 | As for function declarations, we warn about the static-then- | |
2216 | extern case only for -Wtraditional. See generally 6.2.2p3-5,7. */ | |
2217 | if (DECL_FILE_SCOPE_P (newdecl) | |
2218 | && TREE_PUBLIC (newdecl) != TREE_PUBLIC (olddecl)) | |
3c6e6fbf | 2219 | { |
9aaabf8a ZW |
2220 | if (DECL_EXTERNAL (newdecl)) |
2221 | { | |
558d1f81 JM |
2222 | if (!DECL_FILE_SCOPE_P (olddecl)) |
2223 | { | |
097f82ec | 2224 | auto_diagnostic_group d; |
dee15844 JM |
2225 | error ("extern declaration of %q+D follows " |
2226 | "declaration with no linkage", newdecl); | |
71205d17 | 2227 | locate_old_decl (olddecl); |
558d1f81 JM |
2228 | return false; |
2229 | } | |
2230 | else if (warn_traditional) | |
9aaabf8a | 2231 | { |
b8698a0f | 2232 | warned |= warning (OPT_Wtraditional, |
71205d17 MLI |
2233 | "non-static declaration of %q+D " |
2234 | "follows static declaration", newdecl); | |
9aaabf8a ZW |
2235 | } |
2236 | } | |
2237 | else | |
3c6e6fbf | 2238 | { |
097f82ec | 2239 | auto_diagnostic_group d; |
3c6e6fbf | 2240 | if (TREE_PUBLIC (newdecl)) |
dee15844 JM |
2241 | error ("non-static declaration of %q+D follows " |
2242 | "static declaration", newdecl); | |
3c6e6fbf | 2243 | else |
dee15844 JM |
2244 | error ("static declaration of %q+D follows " |
2245 | "non-static declaration", newdecl); | |
3c6e6fbf | 2246 | |
71205d17 | 2247 | locate_old_decl (olddecl); |
3c6e6fbf | 2248 | return false; |
51e29401 RS |
2249 | } |
2250 | } | |
3c6e6fbf ZW |
2251 | /* Two objects with the same name declared at the same block |
2252 | scope must both be external references (6.7p3). */ | |
558d1f81 | 2253 | else if (!DECL_FILE_SCOPE_P (newdecl)) |
3c6e6fbf ZW |
2254 | { |
2255 | if (DECL_EXTERNAL (newdecl)) | |
0b410f0b JM |
2256 | { |
2257 | /* Extern with initializer at block scope, which will | |
2258 | already have received an error. */ | |
2259 | } | |
3c6e6fbf | 2260 | else if (DECL_EXTERNAL (olddecl)) |
0b410f0b | 2261 | { |
097f82ec | 2262 | auto_diagnostic_group d; |
dee15844 JM |
2263 | error ("declaration of %q+D with no linkage follows " |
2264 | "extern declaration", newdecl); | |
71205d17 | 2265 | locate_old_decl (olddecl); |
0b410f0b | 2266 | } |
3c6e6fbf | 2267 | else |
0b410f0b | 2268 | { |
097f82ec | 2269 | auto_diagnostic_group d; |
dee15844 | 2270 | error ("redeclaration of %q+D with no linkage", newdecl); |
71205d17 | 2271 | locate_old_decl (olddecl); |
0b410f0b | 2272 | } |
ecf92f82 | 2273 | |
3c6e6fbf ZW |
2274 | return false; |
2275 | } | |
7a5d2eb8 ILT |
2276 | |
2277 | /* C++ does not permit a decl to appear multiple times at file | |
2278 | scope. */ | |
2279 | if (warn_cxx_compat | |
2280 | && DECL_FILE_SCOPE_P (newdecl) | |
2281 | && !DECL_EXTERNAL (newdecl) | |
2282 | && !DECL_EXTERNAL (olddecl)) | |
2283 | warned |= warning_at (DECL_SOURCE_LOCATION (newdecl), | |
2284 | OPT_Wc___compat, | |
2285 | ("duplicate declaration of %qD is " | |
2286 | "invalid in C++"), | |
2287 | newdecl); | |
1ae0ccb6 | 2288 | } |
3c6e6fbf ZW |
2289 | |
2290 | /* warnings */ | |
d7afec4b | 2291 | /* All decls must agree on a visibility. */ |
c22cacf3 | 2292 | if (CODE_CONTAINS_STRUCT (TREE_CODE (newdecl), TS_DECL_WITH_VIS) |
820cc88f | 2293 | && DECL_VISIBILITY_SPECIFIED (newdecl) && DECL_VISIBILITY_SPECIFIED (olddecl) |
3c6e6fbf | 2294 | && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl)) |
1ae0ccb6 | 2295 | { |
71205d17 MLI |
2296 | warned |= warning (0, "redeclaration of %q+D with different visibility " |
2297 | "(old visibility preserved)", newdecl); | |
1ae0ccb6 | 2298 | } |
3c6e6fbf ZW |
2299 | |
2300 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
5c3a10fb | 2301 | warned |= diagnose_mismatched_attributes (olddecl, newdecl); |
3205a71e | 2302 | else /* PARM_DECL, VAR_DECL */ |
3c6e6fbf | 2303 | { |
f75fbaf7 ZW |
2304 | /* Redeclaration of a parameter is a constraint violation (this is |
2305 | not explicitly stated, but follows from C99 6.7p3 [no more than | |
2306 | one declaration of the same identifier with no linkage in the | |
2307 | same scope, except type tags] and 6.2.2p6 [parameters have no | |
2308 | linkage]). We must check for a forward parameter declaration, | |
2309 | indicated by TREE_ASM_WRITTEN on the old declaration - this is | |
2310 | an extension, the mandatory diagnostic for which is handled by | |
2311 | mark_forward_parm_decls. */ | |
2312 | ||
3205a71e ZW |
2313 | if (TREE_CODE (newdecl) == PARM_DECL |
2314 | && (!TREE_ASM_WRITTEN (olddecl) || TREE_ASM_WRITTEN (newdecl))) | |
2315 | { | |
097f82ec | 2316 | auto_diagnostic_group d; |
dee15844 | 2317 | error ("redefinition of parameter %q+D", newdecl); |
71205d17 | 2318 | locate_old_decl (olddecl); |
3205a71e ZW |
2319 | return false; |
2320 | } | |
51e29401 RS |
2321 | } |
2322 | ||
3c6e6fbf ZW |
2323 | /* Optional warning for completely redundant decls. */ |
2324 | if (!warned && !pedwarned | |
2325 | && warn_redundant_decls | |
2326 | /* Don't warn about a function declaration followed by a | |
2327 | definition. */ | |
3205a71e ZW |
2328 | && !(TREE_CODE (newdecl) == FUNCTION_DECL |
2329 | && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)) | |
8c27b7d4 | 2330 | /* Don't warn about redundant redeclarations of builtins. */ |
c5e36c09 | 2331 | && !(TREE_CODE (newdecl) == FUNCTION_DECL |
3d78e008 ML |
2332 | && !fndecl_built_in_p (newdecl) |
2333 | && fndecl_built_in_p (olddecl) | |
c5e36c09 | 2334 | && !C_DECL_DECLARED_BUILTIN (olddecl)) |
3205a71e ZW |
2335 | /* Don't warn about an extern followed by a definition. */ |
2336 | && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl)) | |
2337 | /* Don't warn about forward parameter decls. */ | |
2338 | && !(TREE_CODE (newdecl) == PARM_DECL | |
52d09157 CR |
2339 | && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)) |
2340 | /* Don't warn about a variable definition following a declaration. */ | |
0ae9bd27 | 2341 | && !(VAR_P (newdecl) |
52d09157 | 2342 | && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl))) |
27f427f8 | 2343 | { |
71205d17 MLI |
2344 | warned = warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D", |
2345 | newdecl); | |
27f427f8 RS |
2346 | } |
2347 | ||
71205d17 | 2348 | /* Report location of previous decl/defn. */ |
3c6e6fbf | 2349 | if (warned || pedwarned) |
71205d17 | 2350 | locate_old_decl (olddecl); |
664b4b1e | 2351 | |
6663ee3b EC |
2352 | #undef DECL_EXTERN_INLINE |
2353 | ||
f8f5c4b3 | 2354 | return retval; |
3c6e6fbf | 2355 | } |
51e29401 | 2356 | |
3c6e6fbf ZW |
2357 | /* Subroutine of duplicate_decls. NEWDECL has been found to be |
2358 | consistent with OLDDECL, but carries new information. Merge the | |
1ef82ef2 | 2359 | new information into OLDDECL. This function issues no |
3c6e6fbf ZW |
2360 | diagnostics. */ |
2361 | ||
2362 | static void | |
1ef82ef2 | 2363 | merge_decls (tree newdecl, tree olddecl, tree newtype, tree oldtype) |
3c6e6fbf | 2364 | { |
71113fcd | 2365 | bool new_is_definition = (TREE_CODE (newdecl) == FUNCTION_DECL |
3fa8871b | 2366 | && DECL_INITIAL (newdecl) != NULL_TREE); |
71113fcd | 2367 | bool new_is_prototype = (TREE_CODE (newdecl) == FUNCTION_DECL |
f4da8dce | 2368 | && prototype_p (TREE_TYPE (newdecl))); |
71113fcd | 2369 | bool old_is_prototype = (TREE_CODE (olddecl) == FUNCTION_DECL |
f4da8dce | 2370 | && prototype_p (TREE_TYPE (olddecl))); |
3c6e6fbf | 2371 | |
f75fbaf7 ZW |
2372 | /* For real parm decl following a forward decl, rechain the old decl |
2373 | in its new location and clear TREE_ASM_WRITTEN (it's not a | |
2374 | forward decl anymore). */ | |
3c6e6fbf | 2375 | if (TREE_CODE (newdecl) == PARM_DECL |
3f75a254 | 2376 | && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)) |
51e29401 | 2377 | { |
f75fbaf7 ZW |
2378 | struct c_binding *b, **here; |
2379 | ||
2380 | for (here = ¤t_scope->bindings; *here; here = &(*here)->prev) | |
2381 | if ((*here)->decl == olddecl) | |
2382 | goto found; | |
366de0ce | 2383 | gcc_unreachable (); |
f75fbaf7 ZW |
2384 | |
2385 | found: | |
2386 | b = *here; | |
2387 | *here = b->prev; | |
2388 | b->prev = current_scope->bindings; | |
2389 | current_scope->bindings = b; | |
2390 | ||
3c6e6fbf | 2391 | TREE_ASM_WRITTEN (olddecl) = 0; |
3c6e6fbf ZW |
2392 | } |
2393 | ||
2394 | DECL_ATTRIBUTES (newdecl) | |
5fd9b178 | 2395 | = targetm.merge_decl_attributes (olddecl, newdecl); |
bf44f7de | 2396 | |
5fde6a45 MP |
2397 | /* For typedefs use the old type, as the new type's DECL_NAME points |
2398 | at newdecl, which will be ggc_freed. */ | |
2399 | if (TREE_CODE (newdecl) == TYPE_DECL) | |
2400 | { | |
2401 | /* But NEWTYPE might have an attribute, honor that. */ | |
2402 | tree tem = newtype; | |
2403 | newtype = oldtype; | |
2404 | ||
2405 | if (TYPE_USER_ALIGN (tem)) | |
2406 | { | |
2407 | if (TYPE_ALIGN (tem) > TYPE_ALIGN (newtype)) | |
fe37c7af | 2408 | SET_TYPE_ALIGN (newtype, TYPE_ALIGN (tem)); |
5fde6a45 MP |
2409 | TYPE_USER_ALIGN (newtype) = true; |
2410 | } | |
2411 | ||
2412 | /* And remove the new type from the variants list. */ | |
2413 | if (TYPE_NAME (TREE_TYPE (newdecl)) == newdecl) | |
2414 | { | |
2415 | tree remove = TREE_TYPE (newdecl); | |
2416 | for (tree t = TYPE_MAIN_VARIANT (remove); ; | |
2417 | t = TYPE_NEXT_VARIANT (t)) | |
2418 | if (TYPE_NEXT_VARIANT (t) == remove) | |
2419 | { | |
2420 | TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (remove); | |
2421 | break; | |
2422 | } | |
2423 | } | |
2424 | } | |
2425 | ||
3c6e6fbf | 2426 | /* Merge the data types specified in the two decls. */ |
1ef82ef2 ZW |
2427 | TREE_TYPE (newdecl) |
2428 | = TREE_TYPE (olddecl) | |
10bc1b1b | 2429 | = composite_type (newtype, oldtype); |
51e29401 | 2430 | |
3c6e6fbf | 2431 | /* Lay the type out, unless already done. */ |
2587f865 | 2432 | if (!comptypes (oldtype, TREE_TYPE (newdecl))) |
3c6e6fbf ZW |
2433 | { |
2434 | if (TREE_TYPE (newdecl) != error_mark_node) | |
2435 | layout_type (TREE_TYPE (newdecl)); | |
2436 | if (TREE_CODE (newdecl) != FUNCTION_DECL | |
2437 | && TREE_CODE (newdecl) != TYPE_DECL | |
2438 | && TREE_CODE (newdecl) != CONST_DECL) | |
2439 | layout_decl (newdecl, 0); | |
2440 | } | |
2441 | else | |
2442 | { | |
2443 | /* Since the type is OLDDECL's, make OLDDECL's size go with. */ | |
2444 | DECL_SIZE (newdecl) = DECL_SIZE (olddecl); | |
2445 | DECL_SIZE_UNIT (newdecl) = DECL_SIZE_UNIT (olddecl); | |
899ca90e | 2446 | SET_DECL_MODE (newdecl, DECL_MODE (olddecl)); |
837edd5f GK |
2447 | if (DECL_ALIGN (olddecl) > DECL_ALIGN (newdecl)) |
2448 | { | |
fe37c7af | 2449 | SET_DECL_ALIGN (newdecl, DECL_ALIGN (olddecl)); |
8220334a | 2450 | DECL_USER_ALIGN (newdecl) |= DECL_USER_ALIGN (olddecl); |
837edd5f | 2451 | } |
00aa1fa2 L |
2452 | if (DECL_WARN_IF_NOT_ALIGN (olddecl) |
2453 | > DECL_WARN_IF_NOT_ALIGN (newdecl)) | |
2454 | SET_DECL_WARN_IF_NOT_ALIGN (newdecl, | |
2455 | DECL_WARN_IF_NOT_ALIGN (olddecl)); | |
3c6e6fbf | 2456 | } |
fc542d3c | 2457 | |
9a60b229 JJ |
2458 | /* Keep the old rtl since we can safely use it. */ |
2459 | if (HAS_RTL_P (olddecl)) | |
2460 | COPY_DECL_RTL (olddecl, newdecl); | |
17aec3eb | 2461 | |
3c6e6fbf ZW |
2462 | /* Merge the type qualifiers. */ |
2463 | if (TREE_READONLY (newdecl)) | |
1ef82ef2 | 2464 | TREE_READONLY (olddecl) = 1; |
facef326 | 2465 | |
3c6e6fbf | 2466 | if (TREE_THIS_VOLATILE (newdecl)) |
ee9f69b4 | 2467 | TREE_THIS_VOLATILE (olddecl) = 1; |
3c6e6fbf | 2468 | |
302a2cc5 JM |
2469 | /* Merge deprecatedness. */ |
2470 | if (TREE_DEPRECATED (newdecl)) | |
2471 | TREE_DEPRECATED (olddecl) = 1; | |
2472 | ||
238fe3c5 RAE |
2473 | /* If a decl is in a system header and the other isn't, keep the one on the |
2474 | system header. Otherwise, keep source location of definition rather than | |
2475 | declaration and of prototype rather than non-prototype unless that | |
2476 | prototype is built-in. */ | |
2477 | if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS) | |
2478 | && DECL_IN_SYSTEM_HEADER (olddecl) | |
2479 | && !DECL_IN_SYSTEM_HEADER (newdecl) ) | |
aa14403d | 2480 | DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl); |
238fe3c5 RAE |
2481 | else if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS) |
2482 | && DECL_IN_SYSTEM_HEADER (newdecl) | |
2483 | && !DECL_IN_SYSTEM_HEADER (olddecl)) | |
aa14403d | 2484 | DECL_SOURCE_LOCATION (olddecl) = DECL_SOURCE_LOCATION (newdecl); |
3fa8871b MP |
2485 | else if ((DECL_INITIAL (newdecl) == NULL_TREE |
2486 | && DECL_INITIAL (olddecl) != NULL_TREE) | |
238fe3c5 RAE |
2487 | || (old_is_prototype && !new_is_prototype |
2488 | && !C_DECL_BUILTIN_PROTOTYPE (olddecl))) | |
3c6e6fbf ZW |
2489 | DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl); |
2490 | ||
3c6e6fbf | 2491 | /* Merge the initialization information. */ |
3fa8871b | 2492 | if (DECL_INITIAL (newdecl) == NULL_TREE) |
3c6e6fbf ZW |
2493 | DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl); |
2494 | ||
953ff289 | 2495 | /* Merge the threadprivate attribute. */ |
0ae9bd27 | 2496 | if (VAR_P (olddecl) && C_DECL_THREADPRIVATE_P (olddecl)) |
5fcffe51 | 2497 | C_DECL_THREADPRIVATE_P (newdecl) = 1; |
953ff289 | 2498 | |
fbbc17c7 MS |
2499 | if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS)) |
2500 | { | |
fbbc17c7 MS |
2501 | /* Copy the assembler name. |
2502 | Currently, it can only be defined in the prototype. */ | |
2503 | COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl); | |
2504 | ||
2505 | /* Use visibility of whichever declaration had it specified */ | |
2506 | if (DECL_VISIBILITY_SPECIFIED (olddecl)) | |
2507 | { | |
2508 | DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl); | |
2509 | DECL_VISIBILITY_SPECIFIED (newdecl) = 1; | |
2510 | } | |
2511 | ||
2512 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2513 | { | |
2514 | DECL_STATIC_CONSTRUCTOR(newdecl) |= DECL_STATIC_CONSTRUCTOR(olddecl); | |
2515 | DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl); | |
2516 | DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl); | |
2517 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl) | |
2518 | |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl); | |
2519 | TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl); | |
fbbc17c7 | 2520 | DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl); |
1ea193c2 | 2521 | DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl); |
becfd6e5 KZ |
2522 | TREE_READONLY (newdecl) |= TREE_READONLY (olddecl); |
2523 | DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl); | |
fbbc17c7 MS |
2524 | DECL_IS_NOVOPS (newdecl) |= DECL_IS_NOVOPS (olddecl); |
2525 | } | |
2526 | ||
2527 | /* Merge the storage class information. */ | |
2528 | merge_weak (newdecl, olddecl); | |
2529 | ||
2530 | /* For functions, static overrides non-static. */ | |
2531 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2532 | { | |
2533 | TREE_PUBLIC (newdecl) &= TREE_PUBLIC (olddecl); | |
2534 | /* This is since we don't automatically | |
2535 | copy the attributes of NEWDECL into OLDDECL. */ | |
2536 | TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl); | |
2537 | /* If this clears `static', clear it in the identifier too. */ | |
2538 | if (!TREE_PUBLIC (olddecl)) | |
2539 | TREE_PUBLIC (DECL_NAME (olddecl)) = 0; | |
2540 | } | |
2541 | } | |
2542 | ||
4eb7fd83 JJ |
2543 | /* In c99, 'extern' declaration before (or after) 'inline' means this |
2544 | function is not DECL_EXTERNAL, unless 'gnu_inline' attribute | |
2545 | is present. */ | |
2546 | if (TREE_CODE (newdecl) == FUNCTION_DECL | |
da1c7394 | 2547 | && !flag_gnu89_inline |
4eb7fd83 JJ |
2548 | && (DECL_DECLARED_INLINE_P (newdecl) |
2549 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2550 | && (!DECL_DECLARED_INLINE_P (newdecl) | |
2551 | || !DECL_DECLARED_INLINE_P (olddecl) | |
2552 | || !DECL_EXTERNAL (olddecl)) | |
2553 | && DECL_EXTERNAL (newdecl) | |
6cf59865 | 2554 | && !lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (newdecl)) |
74b0ec7c | 2555 | && !current_function_decl) |
4eb7fd83 | 2556 | DECL_EXTERNAL (newdecl) = 0; |
71113fcd | 2557 | |
6763b9f7 JM |
2558 | /* An inline definition following a static declaration is not |
2559 | DECL_EXTERNAL. */ | |
2560 | if (new_is_definition | |
2561 | && (DECL_DECLARED_INLINE_P (newdecl) | |
2562 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2563 | && !TREE_PUBLIC (olddecl)) | |
2564 | DECL_EXTERNAL (newdecl) = 0; | |
2565 | ||
fbbc17c7 MS |
2566 | if (DECL_EXTERNAL (newdecl)) |
2567 | { | |
2568 | TREE_STATIC (newdecl) = TREE_STATIC (olddecl); | |
2569 | DECL_EXTERNAL (newdecl) = DECL_EXTERNAL (olddecl); | |
2570 | ||
2571 | /* An extern decl does not override previous storage class. */ | |
2572 | TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl); | |
2573 | if (!DECL_EXTERNAL (newdecl)) | |
2574 | { | |
2575 | DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl); | |
2576 | DECL_COMMON (newdecl) = DECL_COMMON (olddecl); | |
2577 | } | |
2578 | } | |
2579 | else | |
2580 | { | |
2581 | TREE_STATIC (olddecl) = TREE_STATIC (newdecl); | |
2582 | TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl); | |
2583 | } | |
2584 | ||
2585 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2586 | { | |
2587 | /* If we're redefining a function previously defined as extern | |
2588 | inline, make sure we emit debug info for the inline before we | |
2589 | throw it away, in case it was inlined into a function that | |
2590 | hasn't been written out yet. */ | |
2591 | if (new_is_definition && DECL_INITIAL (olddecl)) | |
500b9ca1 JJ |
2592 | /* The new defn must not be inline. */ |
2593 | DECL_UNINLINABLE (newdecl) = 1; | |
fbbc17c7 MS |
2594 | else |
2595 | { | |
2596 | /* If either decl says `inline', this fn is inline, unless | |
2597 | its definition was passed already. */ | |
2598 | if (DECL_DECLARED_INLINE_P (newdecl) | |
2599 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2600 | DECL_DECLARED_INLINE_P (newdecl) = 1; | |
2601 | ||
2602 | DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl) | |
2603 | = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)); | |
c536a6a7 RG |
2604 | |
2605 | DECL_DISREGARD_INLINE_LIMITS (newdecl) | |
2606 | = DECL_DISREGARD_INLINE_LIMITS (olddecl) | |
2607 | = (DECL_DISREGARD_INLINE_LIMITS (newdecl) | |
2608 | || DECL_DISREGARD_INLINE_LIMITS (olddecl)); | |
fbbc17c7 MS |
2609 | } |
2610 | ||
3d78e008 | 2611 | if (fndecl_built_in_p (olddecl)) |
fbbc17c7 MS |
2612 | { |
2613 | /* If redeclaring a builtin function, it stays built in. | |
2614 | But it gets tagged as having been declared. */ | |
2615 | DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl); | |
2616 | DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl); | |
2617 | C_DECL_DECLARED_BUILTIN (newdecl) = 1; | |
2618 | if (new_is_prototype) | |
8b57bfeb JJ |
2619 | { |
2620 | C_DECL_BUILTIN_PROTOTYPE (newdecl) = 0; | |
2621 | if (DECL_BUILT_IN_CLASS (newdecl) == BUILT_IN_NORMAL) | |
e79983f4 MM |
2622 | { |
2623 | enum built_in_function fncode = DECL_FUNCTION_CODE (newdecl); | |
2624 | switch (fncode) | |
2625 | { | |
2626 | /* If a compatible prototype of these builtin functions | |
2627 | is seen, assume the runtime implements it with the | |
2628 | expected semantics. */ | |
2629 | case BUILT_IN_STPCPY: | |
2630 | if (builtin_decl_explicit_p (fncode)) | |
2631 | set_builtin_decl_implicit_p (fncode, true); | |
2632 | break; | |
2633 | default: | |
cbf5d0e7 RB |
2634 | if (builtin_decl_explicit_p (fncode)) |
2635 | set_builtin_decl_declared_p (fncode, true); | |
e79983f4 MM |
2636 | break; |
2637 | } | |
bc1a75dd JJ |
2638 | |
2639 | copy_attributes_to_builtin (newdecl); | |
e79983f4 | 2640 | } |
8b57bfeb | 2641 | } |
fbbc17c7 MS |
2642 | else |
2643 | C_DECL_BUILTIN_PROTOTYPE (newdecl) | |
2644 | = C_DECL_BUILTIN_PROTOTYPE (olddecl); | |
2645 | } | |
2646 | ||
ab442df7 MM |
2647 | /* Preserve function specific target and optimization options */ |
2648 | if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl) | |
2649 | && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl)) | |
2650 | DECL_FUNCTION_SPECIFIC_TARGET (newdecl) | |
2651 | = DECL_FUNCTION_SPECIFIC_TARGET (olddecl); | |
2652 | ||
2653 | if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl) | |
2654 | && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)) | |
2655 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl) | |
2656 | = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl); | |
2657 | ||
fbbc17c7 MS |
2658 | /* Also preserve various other info from the definition. */ |
2659 | if (!new_is_definition) | |
2660 | { | |
dcb6e951 | 2661 | tree t; |
fbbc17c7 MS |
2662 | DECL_RESULT (newdecl) = DECL_RESULT (olddecl); |
2663 | DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl); | |
2664 | DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl); | |
2665 | DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl); | |
dcb6e951 | 2666 | DECL_ARGUMENTS (newdecl) = copy_list (DECL_ARGUMENTS (olddecl)); |
910ad8de | 2667 | for (t = DECL_ARGUMENTS (newdecl); t ; t = DECL_CHAIN (t)) |
dcb6e951 | 2668 | DECL_CONTEXT (t) = newdecl; |
fbbc17c7 | 2669 | |
54dfd46b JH |
2670 | /* See if we've got a function to instantiate from. */ |
2671 | if (DECL_SAVED_TREE (olddecl)) | |
2672 | DECL_ABSTRACT_ORIGIN (newdecl) | |
2673 | = DECL_ABSTRACT_ORIGIN (olddecl); | |
fbbc17c7 MS |
2674 | } |
2675 | } | |
2676 | ||
a35120a3 L |
2677 | /* Merge the USED information. */ |
2678 | if (TREE_USED (olddecl)) | |
2679 | TREE_USED (newdecl) = 1; | |
2680 | else if (TREE_USED (newdecl)) | |
2681 | TREE_USED (olddecl) = 1; | |
0ae9bd27 | 2682 | if (VAR_P (olddecl) || TREE_CODE (olddecl) == PARM_DECL) |
ebfbbdc5 | 2683 | DECL_READ_P (newdecl) |= DECL_READ_P (olddecl); |
c387e067 MS |
2684 | if (DECL_PRESERVE_P (olddecl)) |
2685 | DECL_PRESERVE_P (newdecl) = 1; | |
2686 | else if (DECL_PRESERVE_P (newdecl)) | |
2687 | DECL_PRESERVE_P (olddecl) = 1; | |
e27fb29c | 2688 | |
c2d47482 PK |
2689 | /* Merge DECL_COMMON */ |
2690 | if (VAR_P (olddecl) && VAR_P (newdecl) | |
2691 | && !lookup_attribute ("common", DECL_ATTRIBUTES (newdecl)) | |
2692 | && !lookup_attribute ("nocommon", DECL_ATTRIBUTES (newdecl))) | |
2693 | DECL_COMMON (newdecl) = DECL_COMMON (newdecl) && DECL_COMMON (olddecl); | |
2694 | ||
fbbc17c7 | 2695 | /* Copy most of the decl-specific fields of NEWDECL into OLDDECL. |
f9417da1 RG |
2696 | But preserve OLDDECL's DECL_UID, DECL_CONTEXT and |
2697 | DECL_ARGUMENTS (if appropriate). */ | |
850cba29 | 2698 | { |
b3694847 | 2699 | unsigned olddecl_uid = DECL_UID (olddecl); |
9affb2c7 | 2700 | tree olddecl_context = DECL_CONTEXT (olddecl); |
dcb6e951 RAE |
2701 | tree olddecl_arguments = NULL; |
2702 | if (TREE_CODE (olddecl) == FUNCTION_DECL) | |
2703 | olddecl_arguments = DECL_ARGUMENTS (olddecl); | |
c22cacf3 | 2704 | |
da61dec9 JM |
2705 | memcpy ((char *) olddecl + sizeof (struct tree_common), |
2706 | (char *) newdecl + sizeof (struct tree_common), | |
820cc88f | 2707 | sizeof (struct tree_decl_common) - sizeof (struct tree_common)); |
45f41865 | 2708 | DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl); |
820cc88f DB |
2709 | switch (TREE_CODE (olddecl)) |
2710 | { | |
726a989a | 2711 | case FUNCTION_DECL: |
820cc88f | 2712 | case VAR_DECL: |
aede2c10 JH |
2713 | { |
2714 | struct symtab_node *snode = olddecl->decl_with_vis.symtab_node; | |
2715 | ||
2716 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), | |
2717 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2718 | tree_code_size (TREE_CODE (olddecl)) - sizeof (struct tree_decl_common)); | |
2719 | olddecl->decl_with_vis.symtab_node = snode; | |
5fcffe51 MT |
2720 | |
2721 | if ((DECL_EXTERNAL (olddecl) | |
2722 | || TREE_PUBLIC (olddecl) | |
2723 | || TREE_STATIC (olddecl)) | |
2724 | && DECL_SECTION_NAME (newdecl) != NULL) | |
2725 | set_decl_section_name (olddecl, DECL_SECTION_NAME (newdecl)); | |
2726 | ||
2727 | /* This isn't quite correct for something like | |
2728 | int __thread x attribute ((tls_model ("local-exec"))); | |
2729 | extern int __thread x; | |
2730 | as we'll lose the "local-exec" model. */ | |
0ae9bd27 | 2731 | if (VAR_P (olddecl) && DECL_THREAD_LOCAL_P (newdecl)) |
5fcffe51 | 2732 | set_decl_tls_model (olddecl, DECL_TLS_MODEL (newdecl)); |
aede2c10 JH |
2733 | break; |
2734 | } | |
2735 | ||
2736 | case FIELD_DECL: | |
820cc88f DB |
2737 | case PARM_DECL: |
2738 | case LABEL_DECL: | |
2739 | case RESULT_DECL: | |
2740 | case CONST_DECL: | |
2741 | case TYPE_DECL: | |
820cc88f DB |
2742 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), |
2743 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2744 | tree_code_size (TREE_CODE (olddecl)) - sizeof (struct tree_decl_common)); | |
2745 | break; | |
2746 | ||
2747 | default: | |
c22cacf3 | 2748 | |
820cc88f DB |
2749 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), |
2750 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2751 | sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)); | |
2752 | } | |
850cba29 | 2753 | DECL_UID (olddecl) = olddecl_uid; |
9affb2c7 | 2754 | DECL_CONTEXT (olddecl) = olddecl_context; |
dcb6e951 RAE |
2755 | if (TREE_CODE (olddecl) == FUNCTION_DECL) |
2756 | DECL_ARGUMENTS (olddecl) = olddecl_arguments; | |
850cba29 | 2757 | } |
51e29401 | 2758 | |
2306d91c RH |
2759 | /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl |
2760 | so that encode_section_info has a chance to look at the new decl | |
2761 | flags and attributes. */ | |
2762 | if (DECL_RTL_SET_P (olddecl) | |
2763 | && (TREE_CODE (olddecl) == FUNCTION_DECL | |
0ae9bd27 | 2764 | || (VAR_P (olddecl) && TREE_STATIC (olddecl)))) |
0e6df31e | 2765 | make_decl_rtl (olddecl); |
51e29401 RS |
2766 | } |
2767 | ||
3c6e6fbf ZW |
2768 | /* Handle when a new declaration NEWDECL has the same name as an old |
2769 | one OLDDECL in the same binding contour. Prints an error message | |
2770 | if appropriate. | |
2771 | ||
2772 | If safely possible, alter OLDDECL to look like NEWDECL, and return | |
1ef82ef2 | 2773 | true. Otherwise, return false. */ |
3c6e6fbf ZW |
2774 | |
2775 | static bool | |
1ef82ef2 | 2776 | duplicate_decls (tree newdecl, tree olddecl) |
3c6e6fbf | 2777 | { |
6de9cd9a | 2778 | tree newtype = NULL, oldtype = NULL; |
3c6e6fbf ZW |
2779 | |
2780 | if (!diagnose_mismatched_decls (newdecl, olddecl, &newtype, &oldtype)) | |
f95f80d1 | 2781 | { |
f9837879 | 2782 | /* Avoid `unused variable' and other warnings for OLDDECL. */ |
f95f80d1 SB |
2783 | TREE_NO_WARNING (olddecl) = 1; |
2784 | return false; | |
2785 | } | |
3c6e6fbf | 2786 | |
1ef82ef2 | 2787 | merge_decls (newdecl, olddecl, newtype, oldtype); |
aede2c10 | 2788 | |
22e1cf1c JH |
2789 | /* The NEWDECL will no longer be needed. |
2790 | ||
2791 | Before releasing the node, be sure to remove function from symbol | |
2792 | table that might have been inserted there to record comdat group. | |
2793 | Be sure to however do not free DECL_STRUCT_FUNCTION because this | |
2794 | structure is shared in between NEWDECL and OLDECL. */ | |
2795 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2796 | DECL_STRUCT_FUNCTION (newdecl) = NULL; | |
21b634ae | 2797 | if (VAR_OR_FUNCTION_DECL_P (newdecl)) |
24d047a3 | 2798 | { |
d52f5295 | 2799 | struct symtab_node *snode = symtab_node::get (newdecl); |
24d047a3 | 2800 | if (snode) |
d52f5295 | 2801 | snode->remove (); |
24d047a3 | 2802 | } |
aede2c10 | 2803 | ggc_free (newdecl); |
1ef82ef2 | 2804 | return true; |
3c6e6fbf | 2805 | } |
118a3a8b | 2806 | |
3c6e6fbf | 2807 | \f |
1ad463f4 | 2808 | /* Check whether decl-node NEW_DECL shadows an existing declaration. */ |
339a28b9 | 2809 | static void |
1ad463f4 | 2810 | warn_if_shadowing (tree new_decl) |
339a28b9 | 2811 | { |
f75fbaf7 | 2812 | struct c_binding *b; |
339a28b9 | 2813 | |
f75fbaf7 | 2814 | /* Shadow warnings wanted? */ |
84ff4775 LCW |
2815 | if (!(warn_shadow |
2816 | || warn_shadow_local | |
2817 | || warn_shadow_compatible_local) | |
339a28b9 | 2818 | /* No shadow warnings for internally generated vars. */ |
0edf3afe | 2819 | || DECL_IS_BUILTIN (new_decl)) |
26f943fd NB |
2820 | return; |
2821 | ||
9aaabf8a | 2822 | /* Is anything being shadowed? Invisible decls do not count. */ |
1ad463f4 | 2823 | for (b = I_SYMBOL_BINDING (DECL_NAME (new_decl)); b; b = b->shadowed) |
1d551e4d AM |
2824 | if (b->decl && b->decl != new_decl && !b->invisible |
2825 | && (b->decl == error_mark_node | |
2826 | || diagnostic_report_warnings_p (global_dc, | |
2827 | DECL_SOURCE_LOCATION (b->decl)))) | |
f75fbaf7 | 2828 | { |
1ad463f4 | 2829 | tree old_decl = b->decl; |
f75fbaf7 | 2830 | |
d8dd2f3a JJ |
2831 | if (old_decl == error_mark_node) |
2832 | { | |
b9b8dde3 DD |
2833 | warning (OPT_Wshadow, "declaration of %q+D shadows previous " |
2834 | "non-variable", new_decl); | |
d8dd2f3a JJ |
2835 | break; |
2836 | } | |
097f82ec DM |
2837 | |
2838 | bool warned = false; | |
2839 | auto_diagnostic_group d; | |
2840 | if (TREE_CODE (old_decl) == PARM_DECL) | |
84ff4775 LCW |
2841 | { |
2842 | enum opt_code warning_code; | |
2843 | ||
2844 | /* If '-Wshadow=compatible-local' is specified without other | |
2845 | -Wshadow= flags, we will warn only when the types of the | |
2846 | shadowing variable (i.e. new_decl) and the shadowed variable | |
2847 | (old_decl) are compatible. */ | |
2848 | if (warn_shadow) | |
2849 | warning_code = OPT_Wshadow; | |
2850 | else if (comptypes (TREE_TYPE (old_decl), TREE_TYPE (new_decl))) | |
2851 | warning_code = OPT_Wshadow_compatible_local; | |
2852 | else | |
2853 | warning_code = OPT_Wshadow_local; | |
2854 | warned = warning_at (DECL_SOURCE_LOCATION (new_decl), warning_code, | |
2855 | "declaration of %qD shadows a parameter", | |
2856 | new_decl); | |
2857 | } | |
b9b8dde3 | 2858 | else if (DECL_FILE_SCOPE_P (old_decl)) |
077d1abe MLI |
2859 | { |
2860 | /* Do not warn if a variable shadows a function, unless | |
2861 | the variable is a function or a pointer-to-function. */ | |
2862 | if (TREE_CODE (old_decl) == FUNCTION_DECL | |
2863 | && TREE_CODE (new_decl) != FUNCTION_DECL | |
2864 | && !FUNCTION_POINTER_TYPE_P (TREE_TYPE (new_decl))) | |
2865 | continue; | |
2866 | ||
6447c55d MP |
2867 | warned = warning_at (DECL_SOURCE_LOCATION (new_decl), OPT_Wshadow, |
2868 | "declaration of %qD shadows a global " | |
2869 | "declaration", | |
2870 | new_decl); | |
077d1abe | 2871 | } |
1ad463f4 | 2872 | else if (TREE_CODE (old_decl) == FUNCTION_DECL |
3d78e008 | 2873 | && fndecl_built_in_p (old_decl)) |
d8dd2f3a | 2874 | { |
b9b8dde3 DD |
2875 | warning (OPT_Wshadow, "declaration of %q+D shadows " |
2876 | "a built-in function", new_decl); | |
d8dd2f3a JJ |
2877 | break; |
2878 | } | |
f75fbaf7 | 2879 | else |
84ff4775 LCW |
2880 | { |
2881 | enum opt_code warning_code; | |
2882 | ||
2883 | /* If '-Wshadow=compatible-local' is specified without other | |
2884 | -Wshadow= flags, we will warn only when the types of the | |
2885 | shadowing variable (i.e. new_decl) and the shadowed variable | |
2886 | (old_decl) are compatible. */ | |
2887 | if (warn_shadow) | |
2888 | warning_code = OPT_Wshadow; | |
2889 | else if (comptypes (TREE_TYPE (old_decl), TREE_TYPE (new_decl))) | |
2890 | warning_code = OPT_Wshadow_compatible_local; | |
2891 | else | |
2892 | warning_code = OPT_Wshadow_local; | |
2893 | warned = warning_at (DECL_SOURCE_LOCATION (new_decl), warning_code, | |
2894 | "declaration of %qD shadows a previous local", | |
2895 | new_decl); | |
2896 | } | |
f75fbaf7 | 2897 | |
6447c55d MP |
2898 | if (warned) |
2899 | inform (DECL_SOURCE_LOCATION (old_decl), | |
2900 | "shadowed declaration is here"); | |
a6f78652 | 2901 | |
f75fbaf7 ZW |
2902 | break; |
2903 | } | |
339a28b9 ZW |
2904 | } |
2905 | ||
51e29401 RS |
2906 | /* Record a decl-node X as belonging to the current lexical scope. |
2907 | Check for errors (such as an incompatible declaration for the same | |
2908 | name already seen in the same scope). | |
2909 | ||
2910 | Returns either X or an old decl for the same name. | |
2911 | If an old decl is returned, it may have been smashed | |
2912 | to agree with what X says. */ | |
2913 | ||
2914 | tree | |
35b1a6fa | 2915 | pushdecl (tree x) |
51e29401 | 2916 | { |
b3694847 | 2917 | tree name = DECL_NAME (x); |
f8521984 | 2918 | struct c_scope *scope = current_scope; |
f75fbaf7 | 2919 | struct c_binding *b; |
9aaabf8a | 2920 | bool nested = false; |
b3f27c15 | 2921 | location_t locus = DECL_SOURCE_LOCATION (x); |
51e29401 | 2922 | |
eecec698 ZW |
2923 | /* Must set DECL_CONTEXT for everything not at file scope or |
2924 | DECL_FILE_SCOPE_P won't work. Local externs don't count | |
2925 | unless they have initializers (which generate code). */ | |
2926 | if (current_function_decl | |
21b634ae | 2927 | && (!VAR_OR_FUNCTION_DECL_P (x) |
eecec698 | 2928 | || DECL_INITIAL (x) || !DECL_EXTERNAL (x))) |
339a28b9 | 2929 | DECL_CONTEXT (x) = current_function_decl; |
e13e48e7 | 2930 | |
f75fbaf7 ZW |
2931 | /* Anonymous decls are just inserted in the scope. */ |
2932 | if (!name) | |
51e29401 | 2933 | { |
b3f27c15 JJ |
2934 | bind (name, x, scope, /*invisible=*/false, /*nested=*/false, |
2935 | locus); | |
f75fbaf7 ZW |
2936 | return x; |
2937 | } | |
2938 | ||
2939 | /* First, see if there is another declaration with the same name in | |
2940 | the current scope. If there is, duplicate_decls may do all the | |
2941 | work for us. If duplicate_decls returns false, that indicates | |
2942 | two incompatible decls in the same scope; we are to silently | |
2943 | replace the old one (duplicate_decls has issued all appropriate | |
2944 | diagnostics). In particular, we should not consider possible | |
2945 | duplicates in the external scope, or shadowing. */ | |
2946 | b = I_SYMBOL_BINDING (name); | |
9aaabf8a | 2947 | if (b && B_IN_SCOPE (b, scope)) |
f75fbaf7 | 2948 | { |
2798c11f JM |
2949 | struct c_binding *b_ext, *b_use; |
2950 | tree type = TREE_TYPE (x); | |
2951 | tree visdecl = b->decl; | |
2952 | tree vistype = TREE_TYPE (visdecl); | |
0b410f0b JM |
2953 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE |
2954 | && COMPLETE_TYPE_P (TREE_TYPE (x))) | |
2955 | b->inner_comp = false; | |
2798c11f JM |
2956 | b_use = b; |
2957 | b_ext = b; | |
2958 | /* If this is an external linkage declaration, we should check | |
2959 | for compatibility with the type in the external scope before | |
2960 | setting the type at this scope based on the visible | |
2961 | information only. */ | |
2962 | if (TREE_PUBLIC (x) && TREE_PUBLIC (visdecl)) | |
2963 | { | |
2964 | while (b_ext && !B_IN_EXTERNAL_SCOPE (b_ext)) | |
2965 | b_ext = b_ext->shadowed; | |
2966 | if (b_ext) | |
2967 | { | |
2968 | b_use = b_ext; | |
e1b7793c ILT |
2969 | if (b_use->u.type) |
2970 | TREE_TYPE (b_use->decl) = b_use->u.type; | |
2798c11f JM |
2971 | } |
2972 | } | |
2973 | if (duplicate_decls (x, b_use->decl)) | |
2974 | { | |
2975 | if (b_use != b) | |
2976 | { | |
2977 | /* Save the updated type in the external scope and | |
2978 | restore the proper type for this scope. */ | |
2979 | tree thistype; | |
2980 | if (comptypes (vistype, type)) | |
2981 | thistype = composite_type (vistype, type); | |
2982 | else | |
2983 | thistype = TREE_TYPE (b_use->decl); | |
e1b7793c | 2984 | b_use->u.type = TREE_TYPE (b_use->decl); |
2798c11f | 2985 | if (TREE_CODE (b_use->decl) == FUNCTION_DECL |
3d78e008 | 2986 | && fndecl_built_in_p (b_use->decl)) |
2798c11f JM |
2987 | thistype |
2988 | = build_type_attribute_variant (thistype, | |
2989 | TYPE_ATTRIBUTES | |
e1b7793c | 2990 | (b_use->u.type)); |
2798c11f JM |
2991 | TREE_TYPE (b_use->decl) = thistype; |
2992 | } | |
2993 | return b_use->decl; | |
2994 | } | |
f75fbaf7 ZW |
2995 | else |
2996 | goto skip_external_and_shadow_checks; | |
2997 | } | |
2998 | ||
2999 | /* All declarations with external linkage, and all external | |
3000 | references, go in the external scope, no matter what scope is | |
3001 | current. However, the binding in that scope is ignored for | |
3002 | purposes of normal name lookup. A separate binding structure is | |
3003 | created in the requested scope; this governs the normal | |
3004 | visibility of the symbol. | |
51e29401 | 3005 | |
f75fbaf7 ZW |
3006 | The binding in the externals scope is used exclusively for |
3007 | detecting duplicate declarations of the same object, no matter | |
3008 | what scope they are in; this is what we do here. (C99 6.2.7p2: | |
3009 | All declarations that refer to the same object or function shall | |
3010 | have compatible type; otherwise, the behavior is undefined.) */ | |
3011 | if (DECL_EXTERNAL (x) || scope == file_scope) | |
3012 | { | |
0b410f0b | 3013 | tree type = TREE_TYPE (x); |
3fa8871b MP |
3014 | tree vistype = NULL_TREE; |
3015 | tree visdecl = NULL_TREE; | |
0b410f0b JM |
3016 | bool type_saved = false; |
3017 | if (b && !B_IN_EXTERNAL_SCOPE (b) | |
21b634ae | 3018 | && VAR_OR_FUNCTION_DECL_P (b->decl) |
0b410f0b JM |
3019 | && DECL_FILE_SCOPE_P (b->decl)) |
3020 | { | |
3021 | visdecl = b->decl; | |
3022 | vistype = TREE_TYPE (visdecl); | |
3023 | } | |
3176a0c2 | 3024 | if (scope != file_scope |
234f46ae | 3025 | && !DECL_IN_SYSTEM_HEADER (x)) |
b02a5e26 MP |
3026 | warning_at (locus, OPT_Wnested_externs, |
3027 | "nested extern declaration of %qD", x); | |
234f46ae | 3028 | |
9aaabf8a | 3029 | while (b && !B_IN_EXTERNAL_SCOPE (b)) |
0b410f0b JM |
3030 | { |
3031 | /* If this decl might be modified, save its type. This is | |
3032 | done here rather than when the decl is first bound | |
3033 | because the type may change after first binding, through | |
3034 | being completed or through attributes being added. If we | |
3035 | encounter multiple such decls, only the first should have | |
3036 | its type saved; the others will already have had their | |
3037 | proper types saved and the types will not have changed as | |
3038 | their scopes will not have been re-entered. */ | |
d8dd2f3a | 3039 | if (DECL_P (b->decl) && DECL_FILE_SCOPE_P (b->decl) && !type_saved) |
0b410f0b | 3040 | { |
e1b7793c | 3041 | b->u.type = TREE_TYPE (b->decl); |
0b410f0b JM |
3042 | type_saved = true; |
3043 | } | |
3044 | if (B_IN_FILE_SCOPE (b) | |
0ae9bd27 | 3045 | && VAR_P (b->decl) |
0b410f0b JM |
3046 | && TREE_STATIC (b->decl) |
3047 | && TREE_CODE (TREE_TYPE (b->decl)) == ARRAY_TYPE | |
3048 | && !TYPE_DOMAIN (TREE_TYPE (b->decl)) | |
3049 | && TREE_CODE (type) == ARRAY_TYPE | |
3050 | && TYPE_DOMAIN (type) | |
3051 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) | |
3052 | && !integer_zerop (TYPE_MAX_VALUE (TYPE_DOMAIN (type)))) | |
3053 | { | |
3054 | /* Array type completed in inner scope, which should be | |
3055 | diagnosed if the completion does not have size 1 and | |
3056 | it does not get completed in the file scope. */ | |
3057 | b->inner_comp = true; | |
3058 | } | |
3059 | b = b->shadowed; | |
3060 | } | |
3061 | ||
3062 | /* If a matching external declaration has been found, set its | |
3063 | type to the composite of all the types of that declaration. | |
3064 | After the consistency checks, it will be reset to the | |
3065 | composite of the visible types only. */ | |
3066 | if (b && (TREE_PUBLIC (x) || same_translation_unit_p (x, b->decl)) | |
e1b7793c ILT |
3067 | && b->u.type) |
3068 | TREE_TYPE (b->decl) = b->u.type; | |
f75fbaf7 ZW |
3069 | |
3070 | /* The point of the same_translation_unit_p check here is, | |
3071 | we want to detect a duplicate decl for a construct like | |
3072 | foo() { extern bar(); } ... static bar(); but not if | |
3073 | they are in different translation units. In any case, | |
3074 | the static does not go in the externals scope. */ | |
3075 | if (b | |
9affb2c7 | 3076 | && (TREE_PUBLIC (x) || same_translation_unit_p (x, b->decl)) |
f75fbaf7 | 3077 | && duplicate_decls (x, b->decl)) |
55d54003 | 3078 | { |
0b410f0b | 3079 | tree thistype; |
2798c11f JM |
3080 | if (vistype) |
3081 | { | |
3082 | if (comptypes (vistype, type)) | |
3083 | thistype = composite_type (vistype, type); | |
3084 | else | |
3085 | thistype = TREE_TYPE (b->decl); | |
3086 | } | |
3087 | else | |
3088 | thistype = type; | |
e1b7793c | 3089 | b->u.type = TREE_TYPE (b->decl); |
3d78e008 ML |
3090 | if (TREE_CODE (b->decl) == FUNCTION_DECL |
3091 | && fndecl_built_in_p (b->decl)) | |
0b410f0b JM |
3092 | thistype |
3093 | = build_type_attribute_variant (thistype, | |
e1b7793c | 3094 | TYPE_ATTRIBUTES (b->u.type)); |
0b410f0b | 3095 | TREE_TYPE (b->decl) = thistype; |
b3f27c15 JJ |
3096 | bind (name, b->decl, scope, /*invisible=*/false, /*nested=*/true, |
3097 | locus); | |
f75fbaf7 | 3098 | return b->decl; |
55d54003 | 3099 | } |
9affb2c7 | 3100 | else if (TREE_PUBLIC (x)) |
6645c3fa | 3101 | { |
0b410f0b JM |
3102 | if (visdecl && !b && duplicate_decls (x, visdecl)) |
3103 | { | |
3104 | /* An external declaration at block scope referring to a | |
3105 | visible entity with internal linkage. The composite | |
3106 | type will already be correct for this scope, so we | |
3107 | just need to fall through to make the declaration in | |
3108 | this scope. */ | |
3109 | nested = true; | |
1b36c818 | 3110 | x = visdecl; |
0b410f0b JM |
3111 | } |
3112 | else | |
3113 | { | |
3114 | bind (name, x, external_scope, /*invisible=*/true, | |
b3f27c15 | 3115 | /*nested=*/false, locus); |
0b410f0b JM |
3116 | nested = true; |
3117 | } | |
51e29401 | 3118 | } |
f75fbaf7 | 3119 | } |
35b1a6fa | 3120 | |
7c47d6e9 JM |
3121 | if (TREE_CODE (x) != PARM_DECL) |
3122 | warn_if_shadowing (x); | |
51e29401 | 3123 | |
f75fbaf7 ZW |
3124 | skip_external_and_shadow_checks: |
3125 | if (TREE_CODE (x) == TYPE_DECL) | |
3797cb21 DS |
3126 | { |
3127 | /* So this is a typedef, set its underlying type. */ | |
3128 | set_underlying_type (x); | |
3129 | ||
3130 | /* If X is a typedef defined in the current function, record it | |
3131 | for the purpose of implementing the -Wunused-local-typedefs | |
3132 | warning. */ | |
3133 | record_locally_defined_typedef (x); | |
3134 | } | |
51e29401 | 3135 | |
b3f27c15 | 3136 | bind (name, x, scope, /*invisible=*/false, nested, locus); |
f75fbaf7 ZW |
3137 | |
3138 | /* If x's type is incomplete because it's based on a | |
3139 | structure or union which has not yet been fully declared, | |
3140 | attach it to that structure or union type, so we can go | |
3141 | back and complete the variable declaration later, if the | |
3142 | structure or union gets fully declared. | |
51e29401 | 3143 | |
f75fbaf7 ZW |
3144 | If the input is erroneous, we can have error_mark in the type |
3145 | slot (e.g. "f(void a, ...)") - that doesn't count as an | |
3146 | incomplete type. */ | |
3147 | if (TREE_TYPE (x) != error_mark_node | |
3148 | && !COMPLETE_TYPE_P (TREE_TYPE (x))) | |
3149 | { | |
3150 | tree element = TREE_TYPE (x); | |
3151 | ||
3152 | while (TREE_CODE (element) == ARRAY_TYPE) | |
3153 | element = TREE_TYPE (element); | |
3154 | element = TYPE_MAIN_VARIANT (element); | |
3155 | ||
3e636daf | 3156 | if (RECORD_OR_UNION_TYPE_P (element) |
f75fbaf7 ZW |
3157 | && (TREE_CODE (x) != TYPE_DECL |
3158 | || TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE) | |
3159 | && !COMPLETE_TYPE_P (element)) | |
3160 | C_TYPE_INCOMPLETE_VARS (element) | |
3161 | = tree_cons (NULL_TREE, x, C_TYPE_INCOMPLETE_VARS (element)); | |
3162 | } | |
51e29401 RS |
3163 | return x; |
3164 | } | |
51e29401 | 3165 | \f |
85059a38 MP |
3166 | |
3167 | /* Issue a warning about implicit function declaration. ID is the function | |
3168 | identifier, OLDDECL is a declaration of the function in a different scope, | |
3169 | or NULL_TREE. */ | |
3170 | ||
f75fbaf7 | 3171 | static void |
30281de2 | 3172 | implicit_decl_warning (location_t loc, tree id, tree olddecl) |
f75fbaf7 | 3173 | { |
85059a38 MP |
3174 | if (!warn_implicit_function_declaration) |
3175 | return; | |
71205d17 | 3176 | |
85059a38 | 3177 | bool warned; |
097f82ec | 3178 | auto_diagnostic_group d; |
6c7a259b | 3179 | name_hint hint; |
85059a38 | 3180 | if (!olddecl) |
6c7a259b | 3181 | hint = lookup_name_fuzzy (id, FUZZY_LOOKUP_FUNCTION_NAME, loc); |
85059a38 MP |
3182 | |
3183 | if (flag_isoc99) | |
3184 | { | |
7e2de6df | 3185 | if (const char *suggestion = hint.suggestion ()) |
85059a38 MP |
3186 | { |
3187 | gcc_rich_location richloc (loc); | |
7e2de6df | 3188 | richloc.add_fixit_replace (suggestion); |
64a5912c DM |
3189 | warned = pedwarn (&richloc, OPT_Wimplicit_function_declaration, |
3190 | "implicit declaration of function %qE;" | |
3191 | " did you mean %qs?", | |
7e2de6df | 3192 | id, suggestion); |
85059a38 | 3193 | } |
b8698a0f | 3194 | else |
85059a38 MP |
3195 | warned = pedwarn (loc, OPT_Wimplicit_function_declaration, |
3196 | "implicit declaration of function %qE", id); | |
f75fbaf7 | 3197 | } |
7e2de6df | 3198 | else if (const char *suggestion = hint.suggestion ()) |
85059a38 MP |
3199 | { |
3200 | gcc_rich_location richloc (loc); | |
7e2de6df | 3201 | richloc.add_fixit_replace (suggestion); |
64a5912c | 3202 | warned = warning_at |
85059a38 MP |
3203 | (&richloc, OPT_Wimplicit_function_declaration, |
3204 | G_("implicit declaration of function %qE; did you mean %qs?"), | |
7e2de6df | 3205 | id, suggestion); |
85059a38 MP |
3206 | } |
3207 | else | |
3208 | warned = warning_at (loc, OPT_Wimplicit_function_declaration, | |
3209 | G_("implicit declaration of function %qE"), id); | |
3210 | ||
3211 | if (olddecl && warned) | |
3212 | locate_old_decl (olddecl); | |
6c7a259b DM |
3213 | |
3214 | if (!warned) | |
3215 | hint.suppress (); | |
f75fbaf7 ZW |
3216 | } |
3217 | ||
0382aaa0 MP |
3218 | /* This function represents mapping of a function code FCODE |
3219 | to its respective header. */ | |
3220 | ||
3221 | static const char * | |
3222 | header_for_builtin_fn (enum built_in_function fcode) | |
3223 | { | |
3224 | switch (fcode) | |
3225 | { | |
3226 | CASE_FLT_FN (BUILT_IN_ACOS): | |
3227 | CASE_FLT_FN (BUILT_IN_ACOSH): | |
3228 | CASE_FLT_FN (BUILT_IN_ASIN): | |
3229 | CASE_FLT_FN (BUILT_IN_ASINH): | |
3230 | CASE_FLT_FN (BUILT_IN_ATAN): | |
3231 | CASE_FLT_FN (BUILT_IN_ATANH): | |
3232 | CASE_FLT_FN (BUILT_IN_ATAN2): | |
3233 | CASE_FLT_FN (BUILT_IN_CBRT): | |
3234 | CASE_FLT_FN (BUILT_IN_CEIL): | |
c6cfa2bf | 3235 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_CEIL): |
0382aaa0 | 3236 | CASE_FLT_FN (BUILT_IN_COPYSIGN): |
ee5fd23a | 3237 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_COPYSIGN): |
0382aaa0 MP |
3238 | CASE_FLT_FN (BUILT_IN_COS): |
3239 | CASE_FLT_FN (BUILT_IN_COSH): | |
3240 | CASE_FLT_FN (BUILT_IN_ERF): | |
3241 | CASE_FLT_FN (BUILT_IN_ERFC): | |
3242 | CASE_FLT_FN (BUILT_IN_EXP): | |
3243 | CASE_FLT_FN (BUILT_IN_EXP2): | |
3244 | CASE_FLT_FN (BUILT_IN_EXPM1): | |
3245 | CASE_FLT_FN (BUILT_IN_FABS): | |
ee5fd23a | 3246 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FABS): |
0382aaa0 MP |
3247 | CASE_FLT_FN (BUILT_IN_FDIM): |
3248 | CASE_FLT_FN (BUILT_IN_FLOOR): | |
c6cfa2bf | 3249 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FLOOR): |
0382aaa0 | 3250 | CASE_FLT_FN (BUILT_IN_FMA): |
ee5fd23a | 3251 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMA): |
0382aaa0 | 3252 | CASE_FLT_FN (BUILT_IN_FMAX): |
ee5fd23a | 3253 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMAX): |
0382aaa0 | 3254 | CASE_FLT_FN (BUILT_IN_FMIN): |
ee5fd23a | 3255 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMIN): |
0382aaa0 MP |
3256 | CASE_FLT_FN (BUILT_IN_FMOD): |
3257 | CASE_FLT_FN (BUILT_IN_FREXP): | |
3258 | CASE_FLT_FN (BUILT_IN_HYPOT): | |
3259 | CASE_FLT_FN (BUILT_IN_ILOGB): | |
3260 | CASE_FLT_FN (BUILT_IN_LDEXP): | |
3261 | CASE_FLT_FN (BUILT_IN_LGAMMA): | |
3262 | CASE_FLT_FN (BUILT_IN_LLRINT): | |
3263 | CASE_FLT_FN (BUILT_IN_LLROUND): | |
3264 | CASE_FLT_FN (BUILT_IN_LOG): | |
3265 | CASE_FLT_FN (BUILT_IN_LOG10): | |
3266 | CASE_FLT_FN (BUILT_IN_LOG1P): | |
3267 | CASE_FLT_FN (BUILT_IN_LOG2): | |
3268 | CASE_FLT_FN (BUILT_IN_LOGB): | |
3269 | CASE_FLT_FN (BUILT_IN_LRINT): | |
3270 | CASE_FLT_FN (BUILT_IN_LROUND): | |
3271 | CASE_FLT_FN (BUILT_IN_MODF): | |
3272 | CASE_FLT_FN (BUILT_IN_NAN): | |
3273 | CASE_FLT_FN (BUILT_IN_NEARBYINT): | |
c6cfa2bf | 3274 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_NEARBYINT): |
0382aaa0 MP |
3275 | CASE_FLT_FN (BUILT_IN_NEXTAFTER): |
3276 | CASE_FLT_FN (BUILT_IN_NEXTTOWARD): | |
3277 | CASE_FLT_FN (BUILT_IN_POW): | |
3278 | CASE_FLT_FN (BUILT_IN_REMAINDER): | |
3279 | CASE_FLT_FN (BUILT_IN_REMQUO): | |
3280 | CASE_FLT_FN (BUILT_IN_RINT): | |
c6cfa2bf | 3281 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_RINT): |
0382aaa0 | 3282 | CASE_FLT_FN (BUILT_IN_ROUND): |
c6cfa2bf | 3283 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_ROUND): |
0382aaa0 MP |
3284 | CASE_FLT_FN (BUILT_IN_SCALBLN): |
3285 | CASE_FLT_FN (BUILT_IN_SCALBN): | |
3286 | CASE_FLT_FN (BUILT_IN_SIN): | |
3287 | CASE_FLT_FN (BUILT_IN_SINH): | |
3288 | CASE_FLT_FN (BUILT_IN_SINCOS): | |
3289 | CASE_FLT_FN (BUILT_IN_SQRT): | |
ee5fd23a | 3290 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_SQRT): |
0382aaa0 MP |
3291 | CASE_FLT_FN (BUILT_IN_TAN): |
3292 | CASE_FLT_FN (BUILT_IN_TANH): | |
3293 | CASE_FLT_FN (BUILT_IN_TGAMMA): | |
3294 | CASE_FLT_FN (BUILT_IN_TRUNC): | |
c6cfa2bf | 3295 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_TRUNC): |
0382aaa0 MP |
3296 | case BUILT_IN_ISINF: |
3297 | case BUILT_IN_ISNAN: | |
3298 | return "<math.h>"; | |
3299 | CASE_FLT_FN (BUILT_IN_CABS): | |
3300 | CASE_FLT_FN (BUILT_IN_CACOS): | |
3301 | CASE_FLT_FN (BUILT_IN_CACOSH): | |
3302 | CASE_FLT_FN (BUILT_IN_CARG): | |
3303 | CASE_FLT_FN (BUILT_IN_CASIN): | |
3304 | CASE_FLT_FN (BUILT_IN_CASINH): | |
3305 | CASE_FLT_FN (BUILT_IN_CATAN): | |
3306 | CASE_FLT_FN (BUILT_IN_CATANH): | |
3307 | CASE_FLT_FN (BUILT_IN_CCOS): | |
3308 | CASE_FLT_FN (BUILT_IN_CCOSH): | |
3309 | CASE_FLT_FN (BUILT_IN_CEXP): | |
3310 | CASE_FLT_FN (BUILT_IN_CIMAG): | |
3311 | CASE_FLT_FN (BUILT_IN_CLOG): | |
3312 | CASE_FLT_FN (BUILT_IN_CONJ): | |
3313 | CASE_FLT_FN (BUILT_IN_CPOW): | |
3314 | CASE_FLT_FN (BUILT_IN_CPROJ): | |
3315 | CASE_FLT_FN (BUILT_IN_CREAL): | |
3316 | CASE_FLT_FN (BUILT_IN_CSIN): | |
3317 | CASE_FLT_FN (BUILT_IN_CSINH): | |
3318 | CASE_FLT_FN (BUILT_IN_CSQRT): | |
3319 | CASE_FLT_FN (BUILT_IN_CTAN): | |
3320 | CASE_FLT_FN (BUILT_IN_CTANH): | |
3321 | return "<complex.h>"; | |
3322 | case BUILT_IN_MEMCHR: | |
3323 | case BUILT_IN_MEMCMP: | |
3324 | case BUILT_IN_MEMCPY: | |
3325 | case BUILT_IN_MEMMOVE: | |
3326 | case BUILT_IN_MEMSET: | |
3327 | case BUILT_IN_STRCAT: | |
3328 | case BUILT_IN_STRCHR: | |
3329 | case BUILT_IN_STRCMP: | |
3330 | case BUILT_IN_STRCPY: | |
3331 | case BUILT_IN_STRCSPN: | |
3332 | case BUILT_IN_STRLEN: | |
3333 | case BUILT_IN_STRNCAT: | |
3334 | case BUILT_IN_STRNCMP: | |
3335 | case BUILT_IN_STRNCPY: | |
3336 | case BUILT_IN_STRPBRK: | |
3337 | case BUILT_IN_STRRCHR: | |
3338 | case BUILT_IN_STRSPN: | |
3339 | case BUILT_IN_STRSTR: | |
3340 | return "<string.h>"; | |
3341 | case BUILT_IN_FPRINTF: | |
3342 | case BUILT_IN_PUTC: | |
3343 | case BUILT_IN_FPUTC: | |
3344 | case BUILT_IN_FPUTS: | |
3345 | case BUILT_IN_FSCANF: | |
3346 | case BUILT_IN_FWRITE: | |
3347 | case BUILT_IN_PRINTF: | |
3348 | case BUILT_IN_PUTCHAR: | |
3349 | case BUILT_IN_PUTS: | |
3350 | case BUILT_IN_SCANF: | |
3351 | case BUILT_IN_SNPRINTF: | |
3352 | case BUILT_IN_SPRINTF: | |
3353 | case BUILT_IN_SSCANF: | |
3354 | case BUILT_IN_VFPRINTF: | |
3355 | case BUILT_IN_VFSCANF: | |
3356 | case BUILT_IN_VPRINTF: | |
3357 | case BUILT_IN_VSCANF: | |
3358 | case BUILT_IN_VSNPRINTF: | |
3359 | case BUILT_IN_VSPRINTF: | |
3360 | case BUILT_IN_VSSCANF: | |
3361 | return "<stdio.h>"; | |
3362 | case BUILT_IN_ISALNUM: | |
3363 | case BUILT_IN_ISALPHA: | |
3364 | case BUILT_IN_ISBLANK: | |
3365 | case BUILT_IN_ISCNTRL: | |
3366 | case BUILT_IN_ISDIGIT: | |
3367 | case BUILT_IN_ISGRAPH: | |
3368 | case BUILT_IN_ISLOWER: | |
3369 | case BUILT_IN_ISPRINT: | |
3370 | case BUILT_IN_ISPUNCT: | |
3371 | case BUILT_IN_ISSPACE: | |
3372 | case BUILT_IN_ISUPPER: | |
3373 | case BUILT_IN_ISXDIGIT: | |
3374 | case BUILT_IN_TOLOWER: | |
3375 | case BUILT_IN_TOUPPER: | |
3376 | return "<ctype.h>"; | |
3377 | case BUILT_IN_ISWALNUM: | |
3378 | case BUILT_IN_ISWALPHA: | |
3379 | case BUILT_IN_ISWBLANK: | |
3380 | case BUILT_IN_ISWCNTRL: | |
3381 | case BUILT_IN_ISWDIGIT: | |
3382 | case BUILT_IN_ISWGRAPH: | |
3383 | case BUILT_IN_ISWLOWER: | |
3384 | case BUILT_IN_ISWPRINT: | |
3385 | case BUILT_IN_ISWPUNCT: | |
3386 | case BUILT_IN_ISWSPACE: | |
3387 | case BUILT_IN_ISWUPPER: | |
3388 | case BUILT_IN_ISWXDIGIT: | |
3389 | case BUILT_IN_TOWLOWER: | |
3390 | case BUILT_IN_TOWUPPER: | |
3391 | return "<wctype.h>"; | |
3392 | case BUILT_IN_ABORT: | |
3393 | case BUILT_IN_ABS: | |
3394 | case BUILT_IN_CALLOC: | |
3395 | case BUILT_IN_EXIT: | |
3396 | case BUILT_IN_FREE: | |
3397 | case BUILT_IN_LABS: | |
3398 | case BUILT_IN_LLABS: | |
3399 | case BUILT_IN_MALLOC: | |
3400 | case BUILT_IN_REALLOC: | |
3401 | case BUILT_IN__EXIT2: | |
3402 | case BUILT_IN_ALIGNED_ALLOC: | |
3403 | return "<stdlib.h>"; | |
3404 | case BUILT_IN_IMAXABS: | |
3405 | return "<inttypes.h>"; | |
3406 | case BUILT_IN_STRFTIME: | |
3407 | return "<time.h>"; | |
3408 | default: | |
3409 | return NULL; | |
3410 | } | |
3411 | } | |
3412 | ||
c2255bc4 | 3413 | /* Generate an implicit declaration for identifier FUNCTIONID at LOC as a |
339a28b9 | 3414 | function of type int (). */ |
51e29401 RS |
3415 | |
3416 | tree | |
c2255bc4 | 3417 | implicitly_declare (location_t loc, tree functionid) |
51e29401 | 3418 | { |
0b410f0b | 3419 | struct c_binding *b; |
3fa8871b | 3420 | tree decl = NULL_TREE; |
1ae57298 MM |
3421 | tree asmspec_tree; |
3422 | ||
0b410f0b JM |
3423 | for (b = I_SYMBOL_BINDING (functionid); b; b = b->shadowed) |
3424 | { | |
3425 | if (B_IN_SCOPE (b, external_scope)) | |
3426 | { | |
3427 | decl = b->decl; | |
3428 | break; | |
3429 | } | |
3430 | } | |
51e29401 | 3431 | |
f91f41b2 | 3432 | if (decl) |
339a28b9 | 3433 | { |
e00dceaf | 3434 | if (TREE_CODE (decl) != FUNCTION_DECL) |
d8dd2f3a JJ |
3435 | return decl; |
3436 | ||
f75fbaf7 ZW |
3437 | /* FIXME: Objective-C has weird not-really-builtin functions |
3438 | which are supposed to be visible automatically. They wind up | |
3439 | in the external scope because they're pushed before the file | |
3440 | scope gets created. Catch this here and rebind them into the | |
3441 | file scope. */ | |
3d78e008 | 3442 | if (!fndecl_built_in_p (decl) && DECL_IS_BUILTIN (decl)) |
f75fbaf7 | 3443 | { |
9aaabf8a | 3444 | bind (functionid, decl, file_scope, |
b3f27c15 JJ |
3445 | /*invisible=*/false, /*nested=*/true, |
3446 | DECL_SOURCE_LOCATION (decl)); | |
f75fbaf7 ZW |
3447 | return decl; |
3448 | } | |
3449 | else | |
339a28b9 | 3450 | { |
0b410f0b | 3451 | tree newtype = default_function_type; |
e1b7793c ILT |
3452 | if (b->u.type) |
3453 | TREE_TYPE (decl) = b->u.type; | |
f75fbaf7 ZW |
3454 | /* Implicit declaration of a function already declared |
3455 | (somehow) in a different scope, or as a built-in. | |
3456 | If this is the first time this has happened, warn; | |
0b410f0b | 3457 | then recycle the old declaration but with the new type. */ |
f75fbaf7 ZW |
3458 | if (!C_DECL_IMPLICIT (decl)) |
3459 | { | |
30281de2 | 3460 | implicit_decl_warning (loc, functionid, decl); |
f75fbaf7 ZW |
3461 | C_DECL_IMPLICIT (decl) = 1; |
3462 | } | |
3d78e008 | 3463 | if (fndecl_built_in_p (decl)) |
9cbe78fb | 3464 | { |
0b410f0b JM |
3465 | newtype = build_type_attribute_variant (newtype, |
3466 | TYPE_ATTRIBUTES | |
3467 | (TREE_TYPE (decl))); | |
3468 | if (!comptypes (newtype, TREE_TYPE (decl))) | |
9cbe78fb | 3469 | { |
0382aaa0 MP |
3470 | bool warned = warning_at (loc, 0, "incompatible implicit " |
3471 | "declaration of built-in " | |
3472 | "function %qD", decl); | |
3473 | /* See if we can hint which header to include. */ | |
3474 | const char *header | |
3475 | = header_for_builtin_fn (DECL_FUNCTION_CODE (decl)); | |
3476 | if (header != NULL && warned) | |
eea77d1f DM |
3477 | { |
3478 | rich_location richloc (line_table, loc); | |
85204e23 | 3479 | maybe_add_include_fixit (&richloc, header, true); |
64a5912c DM |
3480 | inform (&richloc, |
3481 | "include %qs or provide a declaration of %qD", | |
3482 | header, decl); | |
eea77d1f | 3483 | } |
0b410f0b | 3484 | newtype = TREE_TYPE (decl); |
9cbe78fb JM |
3485 | } |
3486 | } | |
3487 | else | |
3488 | { | |
0b410f0b | 3489 | if (!comptypes (newtype, TREE_TYPE (decl))) |
9cbe78fb | 3490 | { |
097f82ec | 3491 | auto_diagnostic_group d; |
0382aaa0 MP |
3492 | error_at (loc, "incompatible implicit declaration of " |
3493 | "function %qD", decl); | |
71205d17 | 3494 | locate_old_decl (decl); |
9cbe78fb JM |
3495 | } |
3496 | } | |
e1b7793c | 3497 | b->u.type = TREE_TYPE (decl); |
0b410f0b | 3498 | TREE_TYPE (decl) = newtype; |
9aaabf8a | 3499 | bind (functionid, decl, current_scope, |
b3f27c15 JJ |
3500 | /*invisible=*/false, /*nested=*/true, |
3501 | DECL_SOURCE_LOCATION (decl)); | |
f75fbaf7 | 3502 | return decl; |
339a28b9 | 3503 | } |
339a28b9 | 3504 | } |
51e29401 | 3505 | |
339a28b9 | 3506 | /* Not seen before. */ |
c2255bc4 | 3507 | decl = build_decl (loc, FUNCTION_DECL, functionid, default_function_type); |
1394aabd | 3508 | DECL_EXTERNAL (decl) = 1; |
51e29401 | 3509 | TREE_PUBLIC (decl) = 1; |
339a28b9 | 3510 | C_DECL_IMPLICIT (decl) = 1; |
30281de2 | 3511 | implicit_decl_warning (loc, functionid, 0); |
1ae57298 MM |
3512 | asmspec_tree = maybe_apply_renaming_pragma (decl, /*asmname=*/NULL); |
3513 | if (asmspec_tree) | |
3514 | set_user_assembler_name (decl, TREE_STRING_POINTER (asmspec_tree)); | |
51e29401 | 3515 | |
14077d68 | 3516 | /* C89 says implicit declarations are in the innermost block. |
f458d1d5 | 3517 | So we record the decl in the standard fashion. */ |
339a28b9 | 3518 | decl = pushdecl (decl); |
51e29401 | 3519 | |
339a28b9 | 3520 | /* No need to call objc_check_decl here - it's a function type. */ |
0e6df31e | 3521 | rest_of_decl_compilation (decl, 0, 0); |
51e29401 | 3522 | |
14077d68 ZW |
3523 | /* Write a record describing this implicit function declaration |
3524 | to the prototypes file (if requested). */ | |
51e29401 RS |
3525 | gen_aux_info_record (decl, 0, 1, 0); |
3526 | ||
6431177a JM |
3527 | /* Possibly apply some default attributes to this implicit declaration. */ |
3528 | decl_attributes (&decl, NULL_TREE, 0); | |
3529 | ||
51e29401 RS |
3530 | return decl; |
3531 | } | |
3532 | ||
9cd51ef6 ZW |
3533 | /* Issue an error message for a reference to an undeclared variable |
3534 | ID, including a reference to a builtin outside of function-call | |
3535 | context. Establish a binding of the identifier to error_mark_node | |
3536 | in an appropriate scope, which will suppress further errors for the | |
766beb40 | 3537 | same identifier. The error message should be given location LOC. */ |
9cd51ef6 | 3538 | void |
c2255bc4 | 3539 | undeclared_variable (location_t loc, tree id) |
9cd51ef6 ZW |
3540 | { |
3541 | static bool already = false; | |
f91f41b2 | 3542 | struct c_scope *scope; |
9cd51ef6 | 3543 | |
097f82ec | 3544 | auto_diagnostic_group d; |
3fa8871b | 3545 | if (current_function_decl == NULL_TREE) |
9cd51ef6 | 3546 | { |
6c7a259b | 3547 | name_hint guessed_id = lookup_name_fuzzy (id, FUZZY_LOOKUP_NAME, loc); |
7e2de6df | 3548 | if (const char *suggestion = guessed_id.suggestion ()) |
1a4f11c8 DM |
3549 | { |
3550 | gcc_rich_location richloc (loc); | |
7e2de6df | 3551 | richloc.add_fixit_replace (suggestion); |
64a5912c DM |
3552 | error_at (&richloc, |
3553 | "%qE undeclared here (not in a function);" | |
3554 | " did you mean %qs?", | |
7e2de6df | 3555 | id, suggestion); |
1a4f11c8 DM |
3556 | } |
3557 | else | |
3558 | error_at (loc, "%qE undeclared here (not in a function)", id); | |
f91f41b2 | 3559 | scope = current_scope; |
9cd51ef6 ZW |
3560 | } |
3561 | else | |
3562 | { | |
90fbfdc3 | 3563 | if (!objc_diagnose_private_ivar (id)) |
1a4f11c8 | 3564 | { |
6c7a259b | 3565 | name_hint guessed_id = lookup_name_fuzzy (id, FUZZY_LOOKUP_NAME, loc); |
7e2de6df | 3566 | if (const char *suggestion = guessed_id.suggestion ()) |
1a4f11c8 DM |
3567 | { |
3568 | gcc_rich_location richloc (loc); | |
7e2de6df | 3569 | richloc.add_fixit_replace (suggestion); |
64a5912c DM |
3570 | error_at (&richloc, |
3571 | "%qE undeclared (first use in this function);" | |
3572 | " did you mean %qs?", | |
7e2de6df | 3573 | id, suggestion); |
1a4f11c8 DM |
3574 | } |
3575 | else | |
3576 | error_at (loc, "%qE undeclared (first use in this function)", id); | |
3577 | } | |
3f75a254 | 3578 | if (!already) |
9cd51ef6 | 3579 | { |
0b901e4c MLI |
3580 | inform (loc, "each undeclared identifier is reported only" |
3581 | " once for each function it appears in"); | |
9cd51ef6 ZW |
3582 | already = true; |
3583 | } | |
3584 | ||
f75fbaf7 | 3585 | /* If we are parsing old-style parameter decls, current_function_decl |
c22cacf3 | 3586 | will be nonnull but current_function_scope will be null. */ |
f75fbaf7 | 3587 | scope = current_function_scope ? current_function_scope : current_scope; |
9cd51ef6 | 3588 | } |
b3f27c15 JJ |
3589 | bind (id, error_mark_node, scope, /*invisible=*/false, /*nested=*/false, |
3590 | UNKNOWN_LOCATION); | |
9cd51ef6 | 3591 | } |
51e29401 | 3592 | \f |
14e33ee8 | 3593 | /* Subroutine of lookup_label, declare_label, define_label: construct a |
e1b7793c ILT |
3594 | LABEL_DECL with all the proper frills. Also create a struct |
3595 | c_label_vars initialized for the current scope. */ | |
14e33ee8 ZW |
3596 | |
3597 | static tree | |
e1b7793c ILT |
3598 | make_label (location_t location, tree name, bool defining, |
3599 | struct c_label_vars **p_label_vars) | |
14e33ee8 | 3600 | { |
c2255bc4 | 3601 | tree label = build_decl (location, LABEL_DECL, name, void_type_node); |
14e33ee8 | 3602 | DECL_CONTEXT (label) = current_function_decl; |
899ca90e | 3603 | SET_DECL_MODE (label, VOIDmode); |
14e33ee8 | 3604 | |
766090c2 | 3605 | c_label_vars *label_vars = ggc_alloc<c_label_vars> (); |
e1b7793c ILT |
3606 | label_vars->shadowed = NULL; |
3607 | set_spot_bindings (&label_vars->label_bindings, defining); | |
3608 | label_vars->decls_in_scope = make_tree_vector (); | |
9771b263 | 3609 | label_vars->gotos = NULL; |
e1b7793c ILT |
3610 | *p_label_vars = label_vars; |
3611 | ||
14e33ee8 ZW |
3612 | return label; |
3613 | } | |
3614 | ||
14e33ee8 | 3615 | /* Get the LABEL_DECL corresponding to identifier NAME as a label. |
51e29401 | 3616 | Create one if none exists so far for the current function. |
14e33ee8 ZW |
3617 | This is called when a label is used in a goto expression or |
3618 | has its address taken. */ | |
51e29401 RS |
3619 | |
3620 | tree | |
14e33ee8 | 3621 | lookup_label (tree name) |
51e29401 | 3622 | { |
14e33ee8 | 3623 | tree label; |
e1b7793c | 3624 | struct c_label_vars *label_vars; |
51e29401 | 3625 | |
c58e98c8 | 3626 | if (current_function_scope == 0) |
7d9795e5 | 3627 | { |
c51a1ba9 | 3628 | error ("label %qE referenced outside of any function", name); |
2f3bb934 | 3629 | return NULL_TREE; |
7d9795e5 RS |
3630 | } |
3631 | ||
14e33ee8 ZW |
3632 | /* Use a label already defined or ref'd with this name, but not if |
3633 | it is inherited from a containing function and wasn't declared | |
3634 | using __label__. */ | |
f75fbaf7 | 3635 | label = I_LABEL_DECL (name); |
14e33ee8 ZW |
3636 | if (label && (DECL_CONTEXT (label) == current_function_decl |
3637 | || C_DECLARED_LABEL_FLAG (label))) | |
51e29401 | 3638 | { |
14e33ee8 ZW |
3639 | /* If the label has only been declared, update its apparent |
3640 | location to point here, for better diagnostics if it | |
3641 | turns out not to have been defined. */ | |
e1b7793c | 3642 | if (DECL_INITIAL (label) == NULL_TREE) |
f31686a3 | 3643 | DECL_SOURCE_LOCATION (label) = input_location; |
14e33ee8 | 3644 | return label; |
51e29401 RS |
3645 | } |
3646 | ||
14e33ee8 | 3647 | /* No label binding for that identifier; make one. */ |
e1b7793c | 3648 | label = make_label (input_location, name, false, &label_vars); |
51e29401 | 3649 | |
14077d68 | 3650 | /* Ordinary labels go in the current function scope. */ |
e1b7793c ILT |
3651 | bind_label (name, label, current_function_scope, label_vars); |
3652 | ||
3653 | return label; | |
3654 | } | |
3655 | ||
3656 | /* Issue a warning about DECL for a goto statement at GOTO_LOC going | |
3657 | to LABEL. */ | |
3658 | ||
3659 | static void | |
3660 | warn_about_goto (location_t goto_loc, tree label, tree decl) | |
3661 | { | |
3662 | if (variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) | |
3663 | error_at (goto_loc, | |
3664 | "jump into scope of identifier with variably modified type"); | |
3665 | else | |
3666 | warning_at (goto_loc, OPT_Wjump_misses_init, | |
3667 | "jump skips variable initialization"); | |
3668 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", label); | |
3669 | inform (DECL_SOURCE_LOCATION (decl), "%qD declared here", decl); | |
3670 | } | |
3671 | ||
3672 | /* Look up a label because of a goto statement. This is like | |
3673 | lookup_label, but also issues any appropriate warnings. */ | |
3674 | ||
3675 | tree | |
3676 | lookup_label_for_goto (location_t loc, tree name) | |
3677 | { | |
3678 | tree label; | |
3679 | struct c_label_vars *label_vars; | |
3680 | unsigned int ix; | |
3681 | tree decl; | |
3682 | ||
3683 | label = lookup_label (name); | |
3684 | if (label == NULL_TREE) | |
3685 | return NULL_TREE; | |
3686 | ||
3687 | /* If we are jumping to a different function, we can't issue any | |
3688 | useful warnings. */ | |
3689 | if (DECL_CONTEXT (label) != current_function_decl) | |
3690 | { | |
3691 | gcc_assert (C_DECLARED_LABEL_FLAG (label)); | |
3692 | return label; | |
3693 | } | |
3694 | ||
3695 | label_vars = I_LABEL_BINDING (name)->u.label; | |
3696 | ||
3697 | /* If the label has not yet been defined, then push this goto on a | |
3698 | list for possible later warnings. */ | |
3699 | if (label_vars->label_bindings.scope == NULL) | |
3700 | { | |
766090c2 | 3701 | c_goto_bindings *g = ggc_alloc<c_goto_bindings> (); |
e1b7793c | 3702 | |
e1b7793c ILT |
3703 | g->loc = loc; |
3704 | set_spot_bindings (&g->goto_bindings, true); | |
9771b263 | 3705 | vec_safe_push (label_vars->gotos, g); |
e1b7793c ILT |
3706 | return label; |
3707 | } | |
3708 | ||
3709 | /* If there are any decls in label_vars->decls_in_scope, then this | |
3710 | goto has missed the declaration of the decl. This happens for a | |
3711 | case like | |
3712 | int i = 1; | |
3713 | lab: | |
3714 | ... | |
3715 | goto lab; | |
3716 | Issue a warning or error. */ | |
9771b263 | 3717 | FOR_EACH_VEC_SAFE_ELT (label_vars->decls_in_scope, ix, decl) |
e1b7793c ILT |
3718 | warn_about_goto (loc, label, decl); |
3719 | ||
3720 | if (label_vars->label_bindings.left_stmt_expr) | |
3721 | { | |
3722 | error_at (loc, "jump into statement expression"); | |
3723 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", label); | |
3724 | } | |
3725 | ||
14e33ee8 | 3726 | return label; |
51e29401 RS |
3727 | } |
3728 | ||
14e33ee8 ZW |
3729 | /* Make a label named NAME in the current function, shadowing silently |
3730 | any that may be inherited from containing functions or containing | |
3731 | scopes. This is called for __label__ declarations. */ | |
51e29401 | 3732 | |
51e29401 | 3733 | tree |
14e33ee8 | 3734 | declare_label (tree name) |
51e29401 | 3735 | { |
f75fbaf7 ZW |
3736 | struct c_binding *b = I_LABEL_BINDING (name); |
3737 | tree label; | |
e1b7793c | 3738 | struct c_label_vars *label_vars; |
51e29401 | 3739 | |
14e33ee8 ZW |
3740 | /* Check to make sure that the label hasn't already been declared |
3741 | at this scope */ | |
9aaabf8a | 3742 | if (b && B_IN_CURRENT_SCOPE (b)) |
f75fbaf7 | 3743 | { |
097f82ec | 3744 | auto_diagnostic_group d; |
c51a1ba9 | 3745 | error ("duplicate label declaration %qE", name); |
71205d17 | 3746 | locate_old_decl (b->decl); |
a784882b | 3747 | |
f75fbaf7 ZW |
3748 | /* Just use the previous declaration. */ |
3749 | return b->decl; | |
3750 | } | |
a784882b | 3751 | |
e1b7793c | 3752 | label = make_label (input_location, name, false, &label_vars); |
14e33ee8 | 3753 | C_DECLARED_LABEL_FLAG (label) = 1; |
51e29401 | 3754 | |
14e33ee8 | 3755 | /* Declared labels go in the current scope. */ |
e1b7793c ILT |
3756 | bind_label (name, label, current_scope, label_vars); |
3757 | ||
14e33ee8 | 3758 | return label; |
51e29401 RS |
3759 | } |
3760 | ||
e1b7793c ILT |
3761 | /* When we define a label, issue any appropriate warnings if there are |
3762 | any gotos earlier in the function which jump to this label. */ | |
3763 | ||
3764 | static void | |
3765 | check_earlier_gotos (tree label, struct c_label_vars* label_vars) | |
3766 | { | |
3767 | unsigned int ix; | |
3768 | struct c_goto_bindings *g; | |
3769 | ||
9771b263 | 3770 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
3771 | { |
3772 | struct c_binding *b; | |
3773 | struct c_scope *scope; | |
3774 | ||
3775 | /* We have a goto to this label. The goto is going forward. In | |
3776 | g->scope, the goto is going to skip any binding which was | |
3777 | defined after g->bindings_in_scope. */ | |
744f0946 | 3778 | if (g->goto_bindings.scope->has_jump_unsafe_decl) |
e1b7793c | 3779 | { |
744f0946 ILT |
3780 | for (b = g->goto_bindings.scope->bindings; |
3781 | b != g->goto_bindings.bindings_in_scope; | |
3782 | b = b->prev) | |
3783 | { | |
3784 | if (decl_jump_unsafe (b->decl)) | |
3785 | warn_about_goto (g->loc, label, b->decl); | |
3786 | } | |
e1b7793c ILT |
3787 | } |
3788 | ||
3789 | /* We also need to warn about decls defined in any scopes | |
3790 | between the scope of the label and the scope of the goto. */ | |
3791 | for (scope = label_vars->label_bindings.scope; | |
3792 | scope != g->goto_bindings.scope; | |
3793 | scope = scope->outer) | |
3794 | { | |
3795 | gcc_assert (scope != NULL); | |
744f0946 | 3796 | if (scope->has_jump_unsafe_decl) |
e1b7793c | 3797 | { |
744f0946 ILT |
3798 | if (scope == label_vars->label_bindings.scope) |
3799 | b = label_vars->label_bindings.bindings_in_scope; | |
3800 | else | |
3801 | b = scope->bindings; | |
3802 | for (; b != NULL; b = b->prev) | |
3803 | { | |
3804 | if (decl_jump_unsafe (b->decl)) | |
3805 | warn_about_goto (g->loc, label, b->decl); | |
3806 | } | |
e1b7793c ILT |
3807 | } |
3808 | } | |
3809 | ||
3810 | if (g->goto_bindings.stmt_exprs > 0) | |
3811 | { | |
3812 | error_at (g->loc, "jump into statement expression"); | |
3813 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", | |
3814 | label); | |
3815 | } | |
3816 | } | |
3817 | ||
3818 | /* Now that the label is defined, we will issue warnings about | |
3819 | subsequent gotos to this label when we see them. */ | |
9771b263 | 3820 | vec_safe_truncate (label_vars->gotos, 0); |
e1b7793c ILT |
3821 | label_vars->gotos = NULL; |
3822 | } | |
3823 | ||
51e29401 RS |
3824 | /* Define a label, specifying the location in the source file. |
3825 | Return the LABEL_DECL node for the label, if the definition is valid. | |
6574d78e | 3826 | Otherwise return NULL_TREE. */ |
51e29401 RS |
3827 | |
3828 | tree | |
5b030314 | 3829 | define_label (location_t location, tree name) |
51e29401 | 3830 | { |
14e33ee8 ZW |
3831 | /* Find any preexisting label with this name. It is an error |
3832 | if that label has already been defined in this function, or | |
3833 | if there is a containing function with a declared label with | |
3834 | the same name. */ | |
f75fbaf7 | 3835 | tree label = I_LABEL_DECL (name); |
14e33ee8 ZW |
3836 | |
3837 | if (label | |
3838 | && ((DECL_CONTEXT (label) == current_function_decl | |
3fa8871b | 3839 | && DECL_INITIAL (label) != NULL_TREE) |
14e33ee8 ZW |
3840 | || (DECL_CONTEXT (label) != current_function_decl |
3841 | && C_DECLARED_LABEL_FLAG (label)))) | |
51e29401 | 3842 | { |
097f82ec | 3843 | auto_diagnostic_group d; |
c2255bc4 | 3844 | error_at (location, "duplicate label %qD", label); |
71205d17 | 3845 | locate_old_decl (label); |
6574d78e | 3846 | return NULL_TREE; |
51e29401 | 3847 | } |
14e33ee8 | 3848 | else if (label && DECL_CONTEXT (label) == current_function_decl) |
51e29401 | 3849 | { |
e1b7793c ILT |
3850 | struct c_label_vars *label_vars = I_LABEL_BINDING (name)->u.label; |
3851 | ||
14e33ee8 ZW |
3852 | /* The label has been used or declared already in this function, |
3853 | but not defined. Update its location to point to this | |
3854 | definition. */ | |
f31686a3 | 3855 | DECL_SOURCE_LOCATION (label) = location; |
e1b7793c ILT |
3856 | set_spot_bindings (&label_vars->label_bindings, true); |
3857 | ||
3858 | /* Issue warnings as required about any goto statements from | |
3859 | earlier in the function. */ | |
3860 | check_earlier_gotos (label, label_vars); | |
51e29401 RS |
3861 | } |
3862 | else | |
3863 | { | |
e1b7793c ILT |
3864 | struct c_label_vars *label_vars; |
3865 | ||
14e33ee8 | 3866 | /* No label binding for that identifier; make one. */ |
e1b7793c | 3867 | label = make_label (location, name, true, &label_vars); |
14e33ee8 | 3868 | |
14077d68 | 3869 | /* Ordinary labels go in the current function scope. */ |
e1b7793c | 3870 | bind_label (name, label, current_function_scope, label_vars); |
51e29401 | 3871 | } |
14e33ee8 | 3872 | |
8400e75e | 3873 | if (!in_system_header_at (input_location) && lookup_name (name)) |
c2255bc4 AH |
3874 | warning_at (location, OPT_Wtraditional, |
3875 | "traditional C lacks a separate namespace " | |
3876 | "for labels, identifier %qE conflicts", name); | |
14e33ee8 ZW |
3877 | |
3878 | /* Mark label as having been defined. */ | |
3879 | DECL_INITIAL (label) = error_mark_node; | |
3880 | return label; | |
51e29401 | 3881 | } |
51e29401 | 3882 | \f |
e1b7793c ILT |
3883 | /* Get the bindings for a new switch statement. This is used to issue |
3884 | warnings as appropriate for jumps from the switch to case or | |
3885 | default labels. */ | |
3886 | ||
3887 | struct c_spot_bindings * | |
3888 | c_get_switch_bindings (void) | |
3889 | { | |
3890 | struct c_spot_bindings *switch_bindings; | |
3891 | ||
3892 | switch_bindings = XNEW (struct c_spot_bindings); | |
3893 | set_spot_bindings (switch_bindings, true); | |
3894 | return switch_bindings; | |
3895 | } | |
3896 | ||
3897 | void | |
3898 | c_release_switch_bindings (struct c_spot_bindings *bindings) | |
3899 | { | |
3900 | gcc_assert (bindings->stmt_exprs == 0 && !bindings->left_stmt_expr); | |
3901 | XDELETE (bindings); | |
3902 | } | |
3903 | ||
3904 | /* This is called at the point of a case or default label to issue | |
3905 | warnings about decls as needed. It returns true if it found an | |
3906 | error, not just a warning. */ | |
3907 | ||
3908 | bool | |
3909 | c_check_switch_jump_warnings (struct c_spot_bindings *switch_bindings, | |
3910 | location_t switch_loc, location_t case_loc) | |
3911 | { | |
3912 | bool saw_error; | |
3913 | struct c_scope *scope; | |
3914 | ||
3915 | saw_error = false; | |
3916 | for (scope = current_scope; | |
3917 | scope != switch_bindings->scope; | |
3918 | scope = scope->outer) | |
3919 | { | |
3920 | struct c_binding *b; | |
3921 | ||
3922 | gcc_assert (scope != NULL); | |
744f0946 ILT |
3923 | |
3924 | if (!scope->has_jump_unsafe_decl) | |
3925 | continue; | |
3926 | ||
e1b7793c ILT |
3927 | for (b = scope->bindings; b != NULL; b = b->prev) |
3928 | { | |
3929 | if (decl_jump_unsafe (b->decl)) | |
3930 | { | |
3931 | if (variably_modified_type_p (TREE_TYPE (b->decl), NULL_TREE)) | |
3932 | { | |
3933 | saw_error = true; | |
3934 | error_at (case_loc, | |
3935 | ("switch jumps into scope of identifier with " | |
3936 | "variably modified type")); | |
3937 | } | |
3938 | else | |
3939 | warning_at (case_loc, OPT_Wjump_misses_init, | |
3940 | "switch jumps over variable initialization"); | |
3941 | inform (switch_loc, "switch starts here"); | |
3942 | inform (DECL_SOURCE_LOCATION (b->decl), "%qD declared here", | |
3943 | b->decl); | |
3944 | } | |
3945 | } | |
3946 | } | |
3947 | ||
3948 | if (switch_bindings->stmt_exprs > 0) | |
3949 | { | |
3950 | saw_error = true; | |
3951 | error_at (case_loc, "switch jumps into statement expression"); | |
3952 | inform (switch_loc, "switch starts here"); | |
3953 | } | |
3954 | ||
3955 | return saw_error; | |
3956 | } | |
3957 | \f | |
51e29401 RS |
3958 | /* Given NAME, an IDENTIFIER_NODE, |
3959 | return the structure (or union or enum) definition for that name. | |
f8521984 | 3960 | If THISLEVEL_ONLY is nonzero, searches only the current_scope. |
51e29401 RS |
3961 | CODE says which kind of type the caller wants; |
3962 | it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE. | |
24b97832 ILT |
3963 | If PLOC is not NULL and this returns non-null, it sets *PLOC to the |
3964 | location where the tag was defined. | |
51e29401 RS |
3965 | If the wrong kind of type is found, an error is reported. */ |
3966 | ||
3967 | static tree | |
2f3bb934 | 3968 | lookup_tag (enum tree_code code, tree name, bool thislevel_only, |
24b97832 | 3969 | location_t *ploc) |
51e29401 | 3970 | { |
f75fbaf7 | 3971 | struct c_binding *b = I_TAG_BINDING (name); |
2f3bb934 | 3972 | bool thislevel = false; |
51e29401 | 3973 | |
f75fbaf7 | 3974 | if (!b || !b->decl) |
2f3bb934 | 3975 | return NULL_TREE; |
339a28b9 ZW |
3976 | |
3977 | /* We only care about whether it's in this level if | |
3978 | thislevel_only was set or it might be a type clash. */ | |
f75fbaf7 ZW |
3979 | if (thislevel_only || TREE_CODE (b->decl) != code) |
3980 | { | |
3981 | /* For our purposes, a tag in the external scope is the same as | |
3982 | a tag in the file scope. (Primarily relevant to Objective-C | |
3983 | and its builtin structure tags, which get pushed before the | |
118a3a8b | 3984 | file scope is created.) */ |
9aaabf8a ZW |
3985 | if (B_IN_CURRENT_SCOPE (b) |
3986 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
2f3bb934 | 3987 | thislevel = true; |
51e29401 | 3988 | } |
339a28b9 ZW |
3989 | |
3990 | if (thislevel_only && !thislevel) | |
2f3bb934 | 3991 | return NULL_TREE; |
339a28b9 | 3992 | |
f75fbaf7 | 3993 | if (TREE_CODE (b->decl) != code) |
339a28b9 ZW |
3994 | { |
3995 | /* Definition isn't the kind we were looking for. */ | |
3996 | pending_invalid_xref = name; | |
070588f0 | 3997 | pending_invalid_xref_location = input_location; |
339a28b9 ZW |
3998 | |
3999 | /* If in the same binding level as a declaration as a tag | |
4000 | of a different type, this must not be allowed to | |
4001 | shadow that tag, so give the error immediately. | |
4002 | (For example, "struct foo; union foo;" is invalid.) */ | |
4003 | if (thislevel) | |
4004 | pending_xref_error (); | |
4005 | } | |
24b97832 ILT |
4006 | |
4007 | if (ploc != NULL) | |
4008 | *ploc = b->locus; | |
4009 | ||
f75fbaf7 | 4010 | return b->decl; |
51e29401 RS |
4011 | } |
4012 | ||
0e36f5c7 MP |
4013 | /* Return true if a definition exists for NAME with code CODE. */ |
4014 | ||
4015 | bool | |
4016 | tag_exists_p (enum tree_code code, tree name) | |
4017 | { | |
4018 | struct c_binding *b = I_TAG_BINDING (name); | |
4019 | ||
4020 | if (b == NULL || b->decl == NULL_TREE) | |
4021 | return false; | |
4022 | return TREE_CODE (b->decl) == code; | |
4023 | } | |
4024 | ||
51e29401 RS |
4025 | /* Print an error message now |
4026 | for a recent invalid struct, union or enum cross reference. | |
4027 | We don't print them immediately because they are not invalid | |
4028 | when used in the `struct foo;' construct for shadowing. */ | |
4029 | ||
4030 | void | |
35b1a6fa | 4031 | pending_xref_error (void) |
51e29401 | 4032 | { |
3fa8871b | 4033 | if (pending_invalid_xref != NULL_TREE) |
fab922b1 MLI |
4034 | error_at (pending_invalid_xref_location, "%qE defined as wrong kind of tag", |
4035 | pending_invalid_xref); | |
3fa8871b | 4036 | pending_invalid_xref = NULL_TREE; |
51e29401 RS |
4037 | } |
4038 | ||
51e29401 | 4039 | \f |
f8521984 | 4040 | /* Look up NAME in the current scope and its superiors |
51e29401 RS |
4041 | in the namespace of variables, functions and typedefs. |
4042 | Return a ..._DECL node of some kind representing its definition, | |
6574d78e | 4043 | or return NULL_TREE if it is undefined. */ |
51e29401 RS |
4044 | |
4045 | tree | |
35b1a6fa | 4046 | lookup_name (tree name) |
51e29401 | 4047 | { |
f75fbaf7 | 4048 | struct c_binding *b = I_SYMBOL_BINDING (name); |
9aaabf8a | 4049 | if (b && !b->invisible) |
3797cb21 DS |
4050 | { |
4051 | maybe_record_typedef_use (b->decl); | |
4052 | return b->decl; | |
4053 | } | |
2f3bb934 | 4054 | return NULL_TREE; |
51e29401 RS |
4055 | } |
4056 | ||
f75fbaf7 | 4057 | /* Similar to `lookup_name' but look only at the indicated scope. */ |
51e29401 | 4058 | |
339a28b9 | 4059 | static tree |
f75fbaf7 | 4060 | lookup_name_in_scope (tree name, struct c_scope *scope) |
51e29401 | 4061 | { |
f75fbaf7 | 4062 | struct c_binding *b; |
339a28b9 | 4063 | |
f75fbaf7 | 4064 | for (b = I_SYMBOL_BINDING (name); b; b = b->shadowed) |
9aaabf8a | 4065 | if (B_IN_SCOPE (b, scope)) |
f75fbaf7 | 4066 | return b->decl; |
2f3bb934 | 4067 | return NULL_TREE; |
51e29401 | 4068 | } |
1a4f11c8 | 4069 | |
1a4f11c8 DM |
4070 | /* Look for the closest match for NAME within the currently valid |
4071 | scopes. | |
4072 | ||
4073 | This finds the identifier with the lowest Levenshtein distance to | |
4074 | NAME. If there are multiple candidates with equal minimal distance, | |
4075 | the first one found is returned. Scopes are searched from innermost | |
4076 | outwards, and within a scope in reverse order of declaration, thus | |
4077 | benefiting candidates "near" to the current scope. | |
4078 | ||
4079 | The function also looks for similar macro names to NAME, since a | |
4080 | misspelled macro name will not be expanded, and hence looks like an | |
4081 | identifier to the C frontend. | |
4082 | ||
4083 | It also looks for start_typename keywords, to detect "singed" vs "signed" | |
b1212255 DM |
4084 | typos. |
4085 | ||
4086 | Use LOC for any deferred diagnostics. */ | |
1a4f11c8 | 4087 | |
6c7a259b | 4088 | name_hint |
b1212255 | 4089 | lookup_name_fuzzy (tree name, enum lookup_name_fuzzy_kind kind, location_t loc) |
1a4f11c8 DM |
4090 | { |
4091 | gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE); | |
4092 | ||
b1212255 DM |
4093 | /* First, try some well-known names in the C standard library, in case |
4094 | the user forgot a #include. */ | |
26edace6 DM |
4095 | const char *header_hint |
4096 | = get_c_stdlib_header_for_name (IDENTIFIER_POINTER (name)); | |
4097 | ||
b1212255 DM |
4098 | if (header_hint) |
4099 | return name_hint (NULL, | |
4100 | new suggest_missing_header (loc, | |
4101 | IDENTIFIER_POINTER (name), | |
4102 | header_hint)); | |
4103 | ||
c79144f8 DM |
4104 | /* Only suggest names reserved for the implementation if NAME begins |
4105 | with an underscore. */ | |
4106 | bool consider_implementation_names = (IDENTIFIER_POINTER (name)[0] == '_'); | |
4107 | ||
1a4f11c8 DM |
4108 | best_match<tree, tree> bm (name); |
4109 | ||
4110 | /* Look within currently valid scopes. */ | |
4111 | for (c_scope *scope = current_scope; scope; scope = scope->outer) | |
4112 | for (c_binding *binding = scope->bindings; binding; binding = binding->prev) | |
4113 | { | |
dd36b877 | 4114 | if (!binding->id || binding->invisible) |
1a4f11c8 | 4115 | continue; |
d4300cc6 DM |
4116 | if (binding->decl == error_mark_node) |
4117 | continue; | |
1a4f11c8 DM |
4118 | /* Don't use bindings from implicitly declared functions, |
4119 | as they were likely misspellings themselves. */ | |
4120 | if (TREE_CODE (binding->decl) == FUNCTION_DECL) | |
4121 | if (C_DECL_IMPLICIT (binding->decl)) | |
4122 | continue; | |
c79144f8 DM |
4123 | /* Don't suggest names that are reserved for use by the |
4124 | implementation, unless NAME began with an underscore. */ | |
4125 | if (!consider_implementation_names) | |
4126 | { | |
4127 | const char *suggestion_str = IDENTIFIER_POINTER (binding->id); | |
4128 | if (name_reserved_for_implementation_p (suggestion_str)) | |
4129 | continue; | |
4130 | } | |
ddbbcb19 JJ |
4131 | switch (kind) |
4132 | { | |
4133 | case FUZZY_LOOKUP_TYPENAME: | |
4134 | if (TREE_CODE (binding->decl) != TYPE_DECL) | |
4135 | continue; | |
4136 | break; | |
4137 | ||
4138 | case FUZZY_LOOKUP_FUNCTION_NAME: | |
4139 | if (TREE_CODE (binding->decl) != FUNCTION_DECL) | |
4140 | { | |
4141 | /* Allow function pointers. */ | |
4142 | if ((VAR_P (binding->decl) | |
4143 | || TREE_CODE (binding->decl) == PARM_DECL) | |
4144 | && TREE_CODE (TREE_TYPE (binding->decl)) == POINTER_TYPE | |
4145 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (binding->decl))) | |
4146 | == FUNCTION_TYPE)) | |
4147 | break; | |
4148 | continue; | |
4149 | } | |
4150 | break; | |
4151 | ||
4152 | default: | |
4153 | break; | |
4154 | } | |
1a4f11c8 DM |
4155 | bm.consider (binding->id); |
4156 | } | |
4157 | ||
4158 | /* Consider macros: if the user misspelled a macro name e.g. "SOME_MACRO" | |
4159 | as: | |
4160 | x = SOME_OTHER_MACRO (y); | |
4161 | then "SOME_OTHER_MACRO" will survive to the frontend and show up | |
4162 | as a misspelled identifier. | |
4163 | ||
4164 | Use the best distance so far so that a candidate is only set if | |
4165 | a macro is better than anything so far. This allows early rejection | |
4166 | (without calculating the edit distance) of macro names that must have | |
4167 | distance >= bm.get_best_distance (), and means that we only get a | |
4168 | non-NULL result for best_macro_match if it's better than any of | |
4169 | the identifiers already checked, which avoids needless creation | |
4170 | of identifiers for macro hashnodes. */ | |
7c8f7eaa | 4171 | best_macro_match bmm (name, bm.get_best_distance (), parse_in); |
1a4f11c8 DM |
4172 | cpp_hashnode *best_macro = bmm.get_best_meaningful_candidate (); |
4173 | /* If a macro is the closest so far to NAME, use it, creating an | |
4174 | identifier tree node for it. */ | |
4175 | if (best_macro) | |
4176 | { | |
4177 | const char *id = (const char *)best_macro->ident.str; | |
4178 | tree macro_as_identifier | |
4179 | = get_identifier_with_length (id, best_macro->ident.len); | |
4180 | bm.set_best_so_far (macro_as_identifier, | |
4181 | bmm.get_best_distance (), | |
4182 | bmm.get_best_candidate_length ()); | |
4183 | } | |
4184 | ||
4185 | /* Try the "start_typename" keywords to detect | |
4186 | "singed" vs "signed" typos. */ | |
4187 | if (kind == FUZZY_LOOKUP_TYPENAME) | |
4188 | { | |
4189 | for (unsigned i = 0; i < num_c_common_reswords; i++) | |
4190 | { | |
4191 | const c_common_resword *resword = &c_common_reswords[i]; | |
4192 | if (!c_keyword_starts_typename (resword->rid)) | |
4193 | continue; | |
4194 | tree resword_identifier = ridpointers [resword->rid]; | |
4195 | if (!resword_identifier) | |
4196 | continue; | |
4197 | gcc_assert (TREE_CODE (resword_identifier) == IDENTIFIER_NODE); | |
4198 | bm.consider (resword_identifier); | |
4199 | } | |
4200 | } | |
4201 | ||
de6a69ee DM |
4202 | tree best = bm.get_best_meaningful_candidate (); |
4203 | if (best) | |
6c7a259b | 4204 | return name_hint (IDENTIFIER_POINTER (best), NULL); |
de6a69ee | 4205 | else |
6c7a259b | 4206 | return name_hint (NULL, NULL); |
1a4f11c8 DM |
4207 | } |
4208 | ||
51e29401 RS |
4209 | \f |
4210 | /* Create the predefined scalar types of C, | |
0f41302f | 4211 | and some nodes representing standard constants (0, 1, (void *) 0). |
f8521984 | 4212 | Initialize the global scope. |
51e29401 RS |
4213 | Make definitions for built-in primitive functions. */ |
4214 | ||
4215 | void | |
35b1a6fa | 4216 | c_init_decl_processing (void) |
51e29401 | 4217 | { |
4714db5a | 4218 | location_t save_loc = input_location; |
e13e48e7 | 4219 | |
27bf414c | 4220 | /* Initialize reserved words for parser. */ |
f5e99456 NB |
4221 | c_parse_init (); |
4222 | ||
3fa8871b | 4223 | current_function_decl = NULL_TREE; |
6645c3fa | 4224 | |
bc4b653b JM |
4225 | gcc_obstack_init (&parser_obstack); |
4226 | ||
f75fbaf7 ZW |
4227 | /* Make the externals scope. */ |
4228 | push_scope (); | |
4229 | external_scope = current_scope; | |
14077d68 | 4230 | |
e3091a5f R |
4231 | /* Declarations from c_common_nodes_and_builtins must not be associated |
4232 | with this input file, lest we get differences between using and not | |
4233 | using preprocessed headers. */ | |
3c20847b | 4234 | input_location = BUILTINS_LOCATION; |
51e29401 | 4235 | |
eaa7c03f | 4236 | c_common_nodes_and_builtins (); |
51e29401 | 4237 | |
de7df9eb JM |
4238 | /* In C, comparisons and TRUTH_* expressions have type int. */ |
4239 | truthvalue_type_node = integer_type_node; | |
4240 | truthvalue_true_node = integer_one_node; | |
4241 | truthvalue_false_node = integer_zero_node; | |
4242 | ||
4243 | /* Even in C99, which has a real boolean type. */ | |
c2255bc4 | 4244 | pushdecl (build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier ("_Bool"), |
de7df9eb | 4245 | boolean_type_node)); |
19552aa5 | 4246 | |
4714db5a | 4247 | input_location = save_loc; |
e3091a5f | 4248 | |
2ce07e2d | 4249 | make_fname_decl = c_make_fname_decl; |
0ba8a114 | 4250 | start_fname_decls (); |
51e29401 RS |
4251 | } |
4252 | ||
c2255bc4 AH |
4253 | /* Create the VAR_DECL at LOC for __FUNCTION__ etc. ID is the name to |
4254 | give the decl, NAME is the initialization string and TYPE_DEP | |
4255 | indicates whether NAME depended on the type of the function. As we | |
4256 | don't yet implement delayed emission of static data, we mark the | |
4257 | decl as emitted so it is not placed in the output. Anything using | |
4258 | it must therefore pull out the STRING_CST initializer directly. | |
4259 | FIXME. */ | |
2ce07e2d NS |
4260 | |
4261 | static tree | |
c2255bc4 | 4262 | c_make_fname_decl (location_t loc, tree id, int type_dep) |
2ce07e2d | 4263 | { |
0ba8a114 | 4264 | const char *name = fname_as_string (type_dep); |
2ce07e2d NS |
4265 | tree decl, type, init; |
4266 | size_t length = strlen (name); | |
4267 | ||
46df2823 JM |
4268 | type = build_array_type (char_type_node, |
4269 | build_index_type (size_int (length))); | |
4270 | type = c_build_qualified_type (type, TYPE_QUAL_CONST); | |
2ce07e2d | 4271 | |
c2255bc4 | 4272 | decl = build_decl (loc, VAR_DECL, id, type); |
35b1a6fa | 4273 | |
2ce07e2d NS |
4274 | TREE_STATIC (decl) = 1; |
4275 | TREE_READONLY (decl) = 1; | |
2ce07e2d | 4276 | DECL_ARTIFICIAL (decl) = 1; |
35b1a6fa | 4277 | |
2ce07e2d | 4278 | init = build_string (length + 1, name); |
b1d5455a | 4279 | free (CONST_CAST (char *, name)); |
2ce07e2d NS |
4280 | TREE_TYPE (init) = type; |
4281 | DECL_INITIAL (decl) = init; | |
0ba8a114 NS |
4282 | |
4283 | TREE_USED (decl) = 1; | |
6cce57b0 | 4284 | |
1a4259dc JH |
4285 | if (current_function_decl |
4286 | /* For invalid programs like this: | |
b8698a0f | 4287 | |
1a4259dc JH |
4288 | void foo() |
4289 | const char* p = __FUNCTION__; | |
b8698a0f | 4290 | |
1a4259dc JH |
4291 | the __FUNCTION__ is believed to appear in K&R style function |
4292 | parameter declarator. In that case we still don't have | |
4293 | function_scope. */ | |
95efe6b6 | 4294 | && current_function_scope) |
f91f41b2 ZW |
4295 | { |
4296 | DECL_CONTEXT (decl) = current_function_decl; | |
9aaabf8a | 4297 | bind (id, decl, current_function_scope, |
b3f27c15 | 4298 | /*invisible=*/false, /*nested=*/false, UNKNOWN_LOCATION); |
f91f41b2 | 4299 | } |
339a28b9 | 4300 | |
c2255bc4 | 4301 | finish_decl (decl, loc, init, NULL_TREE, NULL_TREE); |
6645c3fa | 4302 | |
2ce07e2d NS |
4303 | return decl; |
4304 | } | |
4305 | ||
929f3671 | 4306 | tree |
c79efc4d | 4307 | c_builtin_function (tree decl) |
51e29401 | 4308 | { |
c79efc4d RÁE |
4309 | tree type = TREE_TYPE (decl); |
4310 | tree id = DECL_NAME (decl); | |
4311 | ||
4312 | const char *name = IDENTIFIER_POINTER (id); | |
f4da8dce | 4313 | C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type); |
26db82d8 | 4314 | |
f75fbaf7 | 4315 | /* Should never be called on a symbol with a preexisting meaning. */ |
366de0ce | 4316 | gcc_assert (!I_SYMBOL_BINDING (id)); |
f75fbaf7 | 4317 | |
b3f27c15 JJ |
4318 | bind (id, decl, external_scope, /*invisible=*/true, /*nested=*/false, |
4319 | UNKNOWN_LOCATION); | |
f75fbaf7 | 4320 | |
5779e713 MM |
4321 | /* Builtins in the implementation namespace are made visible without |
4322 | needing to be explicitly declared. See push_file_scope. */ | |
4323 | if (name[0] == '_' && (name[1] == '_' || ISUPPER (name[1]))) | |
4324 | { | |
910ad8de | 4325 | DECL_CHAIN (decl) = visible_builtins; |
5779e713 MM |
4326 | visible_builtins = decl; |
4327 | } | |
4328 | ||
4329 | return decl; | |
4330 | } | |
4331 | ||
4332 | tree | |
4333 | c_builtin_function_ext_scope (tree decl) | |
4334 | { | |
4335 | tree type = TREE_TYPE (decl); | |
4336 | tree id = DECL_NAME (decl); | |
4337 | ||
4338 | const char *name = IDENTIFIER_POINTER (id); | |
f4da8dce | 4339 | C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type); |
5779e713 | 4340 | |
0136f8f0 AH |
4341 | if (external_scope) |
4342 | bind (id, decl, external_scope, /*invisible=*/false, /*nested=*/false, | |
4343 | UNKNOWN_LOCATION); | |
5779e713 | 4344 | |
f75fbaf7 ZW |
4345 | /* Builtins in the implementation namespace are made visible without |
4346 | needing to be explicitly declared. See push_file_scope. */ | |
4347 | if (name[0] == '_' && (name[1] == '_' || ISUPPER (name[1]))) | |
4348 | { | |
910ad8de | 4349 | DECL_CHAIN (decl) = visible_builtins; |
f75fbaf7 ZW |
4350 | visible_builtins = decl; |
4351 | } | |
51e29401 RS |
4352 | |
4353 | return decl; | |
4354 | } | |
4355 | \f | |
4356 | /* Called when a declaration is seen that contains no names to declare. | |
4357 | If its type is a reference to a structure, union or enum inherited | |
4358 | from a containing scope, shadow that tag name for the current scope | |
4359 | with a forward reference. | |
4360 | If its type defines a new named structure or union | |
4361 | or defines an enum, it is valid but we need not do anything here. | |
4362 | Otherwise, it is an error. */ | |
4363 | ||
4364 | void | |
deb176fa | 4365 | shadow_tag (const struct c_declspecs *declspecs) |
9282f2f9 RS |
4366 | { |
4367 | shadow_tag_warned (declspecs, 0); | |
4368 | } | |
4369 | ||
0e6df31e GK |
4370 | /* WARNED is 1 if we have done a pedwarn, 2 if we have done a warning, |
4371 | but no pedwarn. */ | |
9282f2f9 | 4372 | void |
deb176fa | 4373 | shadow_tag_warned (const struct c_declspecs *declspecs, int warned) |
51e29401 | 4374 | { |
deb176fa | 4375 | bool found_tag = false; |
51e29401 | 4376 | |
98c3a782 | 4377 | if (declspecs->type && !declspecs->default_int_p && !declspecs->typedef_p) |
51e29401 | 4378 | { |
deb176fa | 4379 | tree value = declspecs->type; |
b3694847 | 4380 | enum tree_code code = TREE_CODE (value); |
51e29401 RS |
4381 | |
4382 | if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE) | |
4383 | /* Used to test also that TYPE_SIZE (value) != 0. | |
4384 | That caused warning for `struct foo;' at top level in the file. */ | |
4385 | { | |
339a28b9 | 4386 | tree name = TYPE_NAME (value); |
b3694847 | 4387 | tree t; |
51e29401 | 4388 | |
deb176fa | 4389 | found_tag = true; |
51e29401 | 4390 | |
da377db9 JM |
4391 | if (declspecs->restrict_p) |
4392 | { | |
4393 | error ("invalid use of %<restrict%>"); | |
4394 | warned = 1; | |
4395 | } | |
4396 | ||
3fa8871b | 4397 | if (name == NULL_TREE) |
51e29401 | 4398 | { |
773edaef RK |
4399 | if (warned != 1 && code != ENUMERAL_TYPE) |
4400 | /* Empty unnamed enum OK */ | |
51e29401 | 4401 | { |
509c9d60 MLI |
4402 | pedwarn (input_location, 0, |
4403 | "unnamed struct/union that defines no instances"); | |
51e29401 RS |
4404 | warned = 1; |
4405 | } | |
4406 | } | |
9e5b2115 PB |
4407 | else if (declspecs->typespec_kind != ctsk_tagdef |
4408 | && declspecs->typespec_kind != ctsk_tagfirstref | |
81da229b JM |
4409 | && declspecs->storage_class != csc_none) |
4410 | { | |
4411 | if (warned != 1) | |
509c9d60 MLI |
4412 | pedwarn (input_location, 0, |
4413 | "empty declaration with storage class specifier " | |
4414 | "does not redeclare tag"); | |
81da229b JM |
4415 | warned = 1; |
4416 | pending_xref_error (); | |
4417 | } | |
9e5b2115 PB |
4418 | else if (declspecs->typespec_kind != ctsk_tagdef |
4419 | && declspecs->typespec_kind != ctsk_tagfirstref | |
81da229b JM |
4420 | && (declspecs->const_p |
4421 | || declspecs->volatile_p | |
267bac10 | 4422 | || declspecs->atomic_p |
36c5e70a BE |
4423 | || declspecs->restrict_p |
4424 | || declspecs->address_space)) | |
81da229b JM |
4425 | { |
4426 | if (warned != 1) | |
509c9d60 MLI |
4427 | pedwarn (input_location, 0, |
4428 | "empty declaration with type qualifier " | |
fcf73884 | 4429 | "does not redeclare tag"); |
81da229b JM |
4430 | warned = 1; |
4431 | pending_xref_error (); | |
4432 | } | |
d19fa6b5 JM |
4433 | else if (declspecs->typespec_kind != ctsk_tagdef |
4434 | && declspecs->typespec_kind != ctsk_tagfirstref | |
4435 | && declspecs->alignas_p) | |
4436 | { | |
4437 | if (warned != 1) | |
4438 | pedwarn (input_location, 0, | |
4439 | "empty declaration with %<_Alignas%> " | |
4440 | "does not redeclare tag"); | |
4441 | warned = 1; | |
4442 | pending_xref_error (); | |
4443 | } | |
51e29401 RS |
4444 | else |
4445 | { | |
3fa8871b | 4446 | pending_invalid_xref = NULL_TREE; |
2f3bb934 | 4447 | t = lookup_tag (code, name, true, NULL); |
51e29401 | 4448 | |
2f3bb934 | 4449 | if (t == NULL_TREE) |
51e29401 RS |
4450 | { |
4451 | t = make_node (code); | |
c2255bc4 | 4452 | pushtag (input_location, name, t); |
51e29401 RS |
4453 | } |
4454 | } | |
4455 | } | |
4456 | else | |
4457 | { | |
8400e75e | 4458 | if (warned != 1 && !in_system_header_at (input_location)) |
773edaef | 4459 | { |
509c9d60 MLI |
4460 | pedwarn (input_location, 0, |
4461 | "useless type name in empty declaration"); | |
deb176fa | 4462 | warned = 1; |
773edaef | 4463 | } |
51e29401 RS |
4464 | } |
4465 | } | |
8400e75e DM |
4466 | else if (warned != 1 && !in_system_header_at (input_location) |
4467 | && declspecs->typedef_p) | |
deb176fa | 4468 | { |
509c9d60 | 4469 | pedwarn (input_location, 0, "useless type name in empty declaration"); |
deb176fa JM |
4470 | warned = 1; |
4471 | } | |
4472 | ||
3fa8871b | 4473 | pending_invalid_xref = NULL_TREE; |
81da229b | 4474 | |
9a26d6ee JM |
4475 | if (declspecs->inline_p) |
4476 | { | |
4477 | error ("%<inline%> in empty declaration"); | |
4478 | warned = 1; | |
4479 | } | |
4480 | ||
bbceee64 JM |
4481 | if (declspecs->noreturn_p) |
4482 | { | |
4483 | error ("%<_Noreturn%> in empty declaration"); | |
4484 | warned = 1; | |
4485 | } | |
4486 | ||
9a26d6ee JM |
4487 | if (current_scope == file_scope && declspecs->storage_class == csc_auto) |
4488 | { | |
4489 | error ("%<auto%> in file-scope empty declaration"); | |
4490 | warned = 1; | |
4491 | } | |
4492 | ||
4493 | if (current_scope == file_scope && declspecs->storage_class == csc_register) | |
4494 | { | |
4495 | error ("%<register%> in file-scope empty declaration"); | |
4496 | warned = 1; | |
4497 | } | |
4498 | ||
8400e75e DM |
4499 | if (!warned && !in_system_header_at (input_location) |
4500 | && declspecs->storage_class != csc_none) | |
9a26d6ee | 4501 | { |
d4ee4d25 | 4502 | warning (0, "useless storage class specifier in empty declaration"); |
9a26d6ee JM |
4503 | warned = 2; |
4504 | } | |
4505 | ||
8400e75e | 4506 | if (!warned && !in_system_header_at (input_location) && declspecs->thread_p) |
9a26d6ee | 4507 | { |
582d9b50 JM |
4508 | warning (0, "useless %qs in empty declaration", |
4509 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
4510 | warned = 2; |
4511 | } | |
4512 | ||
8400e75e DM |
4513 | if (!warned |
4514 | && !in_system_header_at (input_location) | |
4515 | && (declspecs->const_p | |
4516 | || declspecs->volatile_p | |
4517 | || declspecs->atomic_p | |
4518 | || declspecs->restrict_p | |
4519 | || declspecs->address_space)) | |
3b53cddc | 4520 | { |
d4ee4d25 | 4521 | warning (0, "useless type qualifier in empty declaration"); |
3b53cddc JM |
4522 | warned = 2; |
4523 | } | |
4524 | ||
8400e75e DM |
4525 | if (!warned && !in_system_header_at (input_location) |
4526 | && declspecs->alignas_p) | |
d19fa6b5 JM |
4527 | { |
4528 | warning (0, "useless %<_Alignas%> in empty declaration"); | |
4529 | warned = 2; | |
4530 | } | |
4531 | ||
773edaef | 4532 | if (warned != 1) |
51e29401 | 4533 | { |
deb176fa | 4534 | if (!found_tag) |
509c9d60 | 4535 | pedwarn (input_location, 0, "empty declaration"); |
51e29401 RS |
4536 | } |
4537 | } | |
4538 | \f | |
3b53cddc JM |
4539 | |
4540 | /* Return the qualifiers from SPECS as a bitwise OR of TYPE_QUAL_* | |
4541 | bits. SPECS represents declaration specifiers that the grammar | |
4542 | only permits to contain type qualifiers and attributes. */ | |
4543 | ||
4544 | int | |
4545 | quals_from_declspecs (const struct c_declspecs *specs) | |
4546 | { | |
4547 | int quals = ((specs->const_p ? TYPE_QUAL_CONST : 0) | |
4548 | | (specs->volatile_p ? TYPE_QUAL_VOLATILE : 0) | |
36c5e70a | 4549 | | (specs->restrict_p ? TYPE_QUAL_RESTRICT : 0) |
267bac10 | 4550 | | (specs->atomic_p ? TYPE_QUAL_ATOMIC : 0) |
36c5e70a | 4551 | | (ENCODE_QUAL_ADDR_SPACE (specs->address_space))); |
3b53cddc JM |
4552 | gcc_assert (!specs->type |
4553 | && !specs->decl_attr | |
98c3a782 | 4554 | && specs->typespec_word == cts_none |
3b53cddc JM |
4555 | && specs->storage_class == csc_none |
4556 | && !specs->typedef_p | |
98c3a782 | 4557 | && !specs->explicit_signed_p |
3b53cddc | 4558 | && !specs->deprecated_p |
98c3a782 | 4559 | && !specs->long_p |
3b53cddc | 4560 | && !specs->long_long_p |
98c3a782 JM |
4561 | && !specs->short_p |
4562 | && !specs->signed_p | |
4563 | && !specs->unsigned_p | |
4564 | && !specs->complex_p | |
3b53cddc | 4565 | && !specs->inline_p |
bbceee64 | 4566 | && !specs->noreturn_p |
3b53cddc JM |
4567 | && !specs->thread_p); |
4568 | return quals; | |
4569 | } | |
4570 | ||
c2255bc4 AH |
4571 | /* Construct an array declarator. LOC is the location of the |
4572 | beginning of the array (usually the opening brace). EXPR is the | |
4573 | expression inside [], or NULL_TREE. QUALS are the type qualifiers | |
4574 | inside the [] (to be applied to the pointer to which a parameter | |
4575 | array is converted). STATIC_P is true if "static" is inside the | |
4576 | [], false otherwise. VLA_UNSPEC_P is true if the array is [*], a | |
4577 | VLA of unspecified length which is nevertheless a complete type, | |
4578 | false otherwise. The field for the contained declarator is left to | |
4579 | be filled in by set_array_declarator_inner. */ | |
0e03329a | 4580 | |
f8893e47 | 4581 | struct c_declarator * |
c2255bc4 AH |
4582 | build_array_declarator (location_t loc, |
4583 | tree expr, struct c_declspecs *quals, bool static_p, | |
60919bce | 4584 | bool vla_unspec_p) |
0e03329a | 4585 | { |
f8893e47 JM |
4586 | struct c_declarator *declarator = XOBNEW (&parser_obstack, |
4587 | struct c_declarator); | |
c2255bc4 | 4588 | declarator->id_loc = loc; |
f8893e47 JM |
4589 | declarator->kind = cdk_array; |
4590 | declarator->declarator = 0; | |
4591 | declarator->u.array.dimen = expr; | |
3b53cddc JM |
4592 | if (quals) |
4593 | { | |
4594 | declarator->u.array.attrs = quals->attrs; | |
4595 | declarator->u.array.quals = quals_from_declspecs (quals); | |
4596 | } | |
4597 | else | |
4598 | { | |
4599 | declarator->u.array.attrs = NULL_TREE; | |
4600 | declarator->u.array.quals = 0; | |
4601 | } | |
f8893e47 JM |
4602 | declarator->u.array.static_p = static_p; |
4603 | declarator->u.array.vla_unspec_p = vla_unspec_p; | |
f3bede71 MP |
4604 | if (static_p || quals != NULL) |
4605 | pedwarn_c90 (loc, OPT_Wpedantic, | |
509c9d60 | 4606 | "ISO C90 does not support %<static%> or type " |
bda67431 | 4607 | "qualifiers in parameter array declarators"); |
f3bede71 MP |
4608 | if (vla_unspec_p) |
4609 | pedwarn_c90 (loc, OPT_Wpedantic, | |
509c9d60 | 4610 | "ISO C90 does not support %<[*]%> array declarators"); |
0e03329a | 4611 | if (vla_unspec_p) |
52ffd86e MS |
4612 | { |
4613 | if (!current_scope->parm_flag) | |
4614 | { | |
4615 | /* C99 6.7.5.2p4 */ | |
c2255bc4 AH |
4616 | error_at (loc, "%<[*]%> not allowed in other than " |
4617 | "function prototype scope"); | |
52ffd86e MS |
4618 | declarator->u.array.vla_unspec_p = false; |
4619 | return NULL; | |
4620 | } | |
4621 | current_scope->had_vla_unspec = true; | |
4622 | } | |
f8893e47 | 4623 | return declarator; |
0e03329a JM |
4624 | } |
4625 | ||
f8893e47 JM |
4626 | /* Set the contained declarator of an array declarator. DECL is the |
4627 | declarator, as constructed by build_array_declarator; INNER is what | |
6ac0194d | 4628 | appears on the left of the []. */ |
0e03329a | 4629 | |
f8893e47 JM |
4630 | struct c_declarator * |
4631 | set_array_declarator_inner (struct c_declarator *decl, | |
6ac0194d | 4632 | struct c_declarator *inner) |
0e03329a | 4633 | { |
f8893e47 | 4634 | decl->declarator = inner; |
0e03329a JM |
4635 | return decl; |
4636 | } | |
1f0f7ceb RS |
4637 | |
4638 | /* INIT is a constructor that forms DECL's initializer. If the final | |
4639 | element initializes a flexible array field, add the size of that | |
4640 | initializer to DECL's size. */ | |
4641 | ||
4642 | static void | |
4643 | add_flexible_array_elts_to_size (tree decl, tree init) | |
4644 | { | |
1f0f7ceb RS |
4645 | tree elt, type; |
4646 | ||
9771b263 | 4647 | if (vec_safe_is_empty (CONSTRUCTOR_ELTS (init))) |
1f0f7ceb RS |
4648 | return; |
4649 | ||
9771b263 | 4650 | elt = CONSTRUCTOR_ELTS (init)->last ().value; |
1f0f7ceb RS |
4651 | type = TREE_TYPE (elt); |
4652 | if (TREE_CODE (type) == ARRAY_TYPE | |
4653 | && TYPE_SIZE (type) == NULL_TREE | |
4654 | && TYPE_DOMAIN (type) != NULL_TREE | |
4655 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) == NULL_TREE) | |
4656 | { | |
4657 | complete_array_type (&type, elt, false); | |
4658 | DECL_SIZE (decl) | |
4659 | = size_binop (PLUS_EXPR, DECL_SIZE (decl), TYPE_SIZE (type)); | |
4660 | DECL_SIZE_UNIT (decl) | |
4661 | = size_binop (PLUS_EXPR, DECL_SIZE_UNIT (decl), TYPE_SIZE_UNIT (type)); | |
4662 | } | |
4663 | } | |
0e03329a | 4664 | \f |
928c19bb JM |
4665 | /* Decode a "typename", such as "int **", returning a ..._TYPE node. |
4666 | Set *EXPR, if EXPR not NULL, to any expression to be evaluated | |
4667 | before the type name, and set *EXPR_CONST_OPERANDS, if | |
4668 | EXPR_CONST_OPERANDS not NULL, to indicate whether the type name may | |
4669 | appear in a constant expression. */ | |
51e29401 RS |
4670 | |
4671 | tree | |
928c19bb JM |
4672 | groktypename (struct c_type_name *type_name, tree *expr, |
4673 | bool *expr_const_operands) | |
51e29401 | 4674 | { |
f8893e47 | 4675 | tree type; |
deb176fa | 4676 | tree attrs = type_name->specs->attrs; |
d3b4cd6f | 4677 | |
deb176fa | 4678 | type_name->specs->attrs = NULL_TREE; |
d3b4cd6f | 4679 | |
deb176fa | 4680 | type = grokdeclarator (type_name->declarator, type_name->specs, TYPENAME, |
928c19bb JM |
4681 | false, NULL, &attrs, expr, expr_const_operands, |
4682 | DEPRECATED_NORMAL); | |
d3b4cd6f AH |
4683 | |
4684 | /* Apply attributes. */ | |
f8893e47 | 4685 | decl_attributes (&type, attrs, 0); |
d3b4cd6f | 4686 | |
f8893e47 | 4687 | return type; |
51e29401 RS |
4688 | } |
4689 | ||
acf0174b JJ |
4690 | /* Wrapper for decl_attributes that adds some implicit attributes |
4691 | to VAR_DECLs or FUNCTION_DECLs. */ | |
4692 | ||
4693 | static tree | |
4694 | c_decl_attributes (tree *node, tree attributes, int flags) | |
4695 | { | |
4696 | /* Add implicit "omp declare target" attribute if requested. */ | |
4697 | if (current_omp_declare_target_attribute | |
0ae9bd27 | 4698 | && ((VAR_P (*node) && is_global_var (*node)) |
acf0174b JJ |
4699 | || TREE_CODE (*node) == FUNCTION_DECL)) |
4700 | { | |
0ae9bd27 | 4701 | if (VAR_P (*node) |
e01d41e5 | 4702 | && !lang_hooks.types.omp_mappable_type (TREE_TYPE (*node))) |
9b452033 JJ |
4703 | attributes = tree_cons (get_identifier ("omp declare target implicit"), |
4704 | NULL_TREE, attributes); | |
acf0174b JJ |
4705 | else |
4706 | attributes = tree_cons (get_identifier ("omp declare target"), | |
4707 | NULL_TREE, attributes); | |
4708 | } | |
5d9ae53d MS |
4709 | |
4710 | /* Look up the current declaration with all the attributes merged | |
4711 | so far so that attributes on the current declaration that's | |
4712 | about to be pushed that conflict with the former can be detected, | |
4713 | diagnosed, and rejected as appropriate. */ | |
4714 | tree last_decl = lookup_name (DECL_NAME (*node)); | |
4715 | if (!last_decl) | |
4716 | last_decl = lookup_name_in_scope (DECL_NAME (*node), external_scope); | |
4717 | ||
4718 | return decl_attributes (node, attributes, flags, last_decl); | |
acf0174b JJ |
4719 | } |
4720 | ||
4721 | ||
51e29401 RS |
4722 | /* Decode a declarator in an ordinary declaration or data definition. |
4723 | This is called as soon as the type information and variable name | |
4724 | have been parsed, before parsing the initializer if any. | |
4725 | Here we create the ..._DECL node, fill in its type, | |
4726 | and put it on the list of decls for the current context. | |
4727 | The ..._DECL node is returned as the value. | |
4728 | ||
4729 | Exception: for arrays where the length is not specified, | |
4730 | the type is left null, to be filled in by `finish_decl'. | |
4731 | ||
4732 | Function definitions do not come here; they go to start_function | |
4733 | instead. However, external and forward declarations of functions | |
4734 | do go through here. Structure field declarations are done by | |
4735 | grokfield and not through here. */ | |
4736 | ||
51e29401 | 4737 | tree |
deb176fa | 4738 | start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs, |
f8893e47 | 4739 | bool initialized, tree attributes) |
51e29401 | 4740 | { |
e23bd218 | 4741 | tree decl; |
b3694847 | 4742 | tree tem; |
928c19bb | 4743 | tree expr = NULL_TREE; |
0da300cd | 4744 | enum deprecated_states deprecated_state = DEPRECATED_NORMAL; |
35b1a6fa | 4745 | |
e23bd218 IR |
4746 | /* An object declared as __attribute__((deprecated)) suppresses |
4747 | warnings of uses of other deprecated items. */ | |
4748 | if (lookup_attribute ("deprecated", attributes)) | |
4749 | deprecated_state = DEPRECATED_SUPPRESS; | |
4750 | ||
4751 | decl = grokdeclarator (declarator, declspecs, | |
928c19bb | 4752 | NORMAL, initialized, NULL, &attributes, &expr, NULL, |
0da300cd | 4753 | deprecated_state); |
e5165b60 MP |
4754 | if (!decl || decl == error_mark_node) |
4755 | return NULL_TREE; | |
35b1a6fa | 4756 | |
928c19bb | 4757 | if (expr) |
0e0d82a7 | 4758 | add_stmt (fold_convert (void_type_node, expr)); |
928c19bb | 4759 | |
0cd020ae PK |
4760 | if (TREE_CODE (decl) != FUNCTION_DECL && MAIN_NAME_P (DECL_NAME (decl)) |
4761 | && TREE_PUBLIC (decl)) | |
dee15844 | 4762 | warning (OPT_Wmain, "%q+D is usually a function", decl); |
b8705e61 | 4763 | |
51e29401 RS |
4764 | if (initialized) |
4765 | /* Is it valid for this decl to have an initializer at all? | |
4766 | If not, set INITIALIZED to zero, which will indirectly | |
f75fbaf7 | 4767 | tell 'finish_decl' to ignore the initializer once it is parsed. */ |
51e29401 RS |
4768 | switch (TREE_CODE (decl)) |
4769 | { | |
4770 | case TYPE_DECL: | |
bda67431 | 4771 | error ("typedef %qD is initialized (use __typeof__ instead)", decl); |
e3455240 | 4772 | initialized = false; |
51e29401 RS |
4773 | break; |
4774 | ||
4775 | case FUNCTION_DECL: | |
bda67431 | 4776 | error ("function %qD is initialized like a variable", decl); |
e3455240 | 4777 | initialized = false; |
51e29401 RS |
4778 | break; |
4779 | ||
4780 | case PARM_DECL: | |
4781 | /* DECL_INITIAL in a PARM_DECL is really DECL_ARG_TYPE. */ | |
bda67431 | 4782 | error ("parameter %qD is initialized", decl); |
e3455240 | 4783 | initialized = false; |
51e29401 RS |
4784 | break; |
4785 | ||
4786 | default: | |
f75fbaf7 ZW |
4787 | /* Don't allow initializations for incomplete types except for |
4788 | arrays which might be completed by the initialization. */ | |
f4fce7ed | 4789 | |
f75fbaf7 ZW |
4790 | /* This can happen if the array size is an undefined macro. |
4791 | We already gave a warning, so we don't need another one. */ | |
f4fce7ed | 4792 | if (TREE_TYPE (decl) == error_mark_node) |
e3455240 | 4793 | initialized = false; |
f4fce7ed | 4794 | else if (COMPLETE_TYPE_P (TREE_TYPE (decl))) |
51e29401 RS |
4795 | { |
4796 | /* A complete type is ok if size is fixed. */ | |
4797 | ||
4798 | if (TREE_CODE (TYPE_SIZE (TREE_TYPE (decl))) != INTEGER_CST | |
4799 | || C_DECL_VARIABLE_SIZE (decl)) | |
4800 | { | |
4801 | error ("variable-sized object may not be initialized"); | |
e3455240 | 4802 | initialized = false; |
51e29401 RS |
4803 | } |
4804 | } | |
4805 | else if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE) | |
4806 | { | |
bda67431 | 4807 | error ("variable %qD has initializer but incomplete type", decl); |
e3455240 | 4808 | initialized = false; |
51e29401 | 4809 | } |
ef787822 JM |
4810 | else if (C_DECL_VARIABLE_SIZE (decl)) |
4811 | { | |
4812 | /* Although C99 is unclear about whether incomplete arrays | |
4813 | of VLAs themselves count as VLAs, it does not make | |
4814 | sense to permit them to be initialized given that | |
4815 | ordinary VLAs may not be initialized. */ | |
4816 | error ("variable-sized object may not be initialized"); | |
e3455240 | 4817 | initialized = false; |
ef787822 | 4818 | } |
51e29401 RS |
4819 | } |
4820 | ||
4821 | if (initialized) | |
4822 | { | |
f75fbaf7 | 4823 | if (current_scope == file_scope) |
51e29401 RS |
4824 | TREE_STATIC (decl) = 1; |
4825 | ||
f75fbaf7 | 4826 | /* Tell 'pushdecl' this is an initialized decl |
51e29401 | 4827 | even though we don't yet have the initializer expression. |
f75fbaf7 | 4828 | Also tell 'finish_decl' it may store the real initializer. */ |
51e29401 RS |
4829 | DECL_INITIAL (decl) = error_mark_node; |
4830 | } | |
4831 | ||
4832 | /* If this is a function declaration, write a record describing it to the | |
4833 | prototypes file (if requested). */ | |
4834 | ||
4835 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
f4da8dce | 4836 | gen_aux_info_record (decl, 0, 0, prototype_p (TREE_TYPE (decl))); |
51e29401 | 4837 | |
2786cbad JM |
4838 | /* ANSI specifies that a tentative definition which is not merged with |
4839 | a non-tentative definition behaves exactly like a definition with an | |
4840 | initializer equal to zero. (Section 3.7.2) | |
3d78f2e9 RH |
4841 | |
4842 | -fno-common gives strict ANSI behavior, though this tends to break | |
4843 | a large body of code that grew up without this rule. | |
4844 | ||
4845 | Thread-local variables are never common, since there's no entrenched | |
4846 | body of code to break, and it allows more efficient variable references | |
95bd1dd7 | 4847 | in the presence of dynamic linking. */ |
3d78f2e9 | 4848 | |
0ae9bd27 | 4849 | if (VAR_P (decl) |
3d78f2e9 RH |
4850 | && !initialized |
4851 | && TREE_PUBLIC (decl) | |
c2f7fa15 | 4852 | && !DECL_THREAD_LOCAL_P (decl) |
3d78f2e9 | 4853 | && !flag_no_common) |
2786cbad | 4854 | DECL_COMMON (decl) = 1; |
8615176a | 4855 | |
daa6d5ff | 4856 | /* Set attributes here so if duplicate decl, will have proper attributes. */ |
acf0174b | 4857 | c_decl_attributes (&decl, attributes, 0); |
daa6d5ff | 4858 | |
4eb7fd83 JJ |
4859 | /* Handle gnu_inline attribute. */ |
4860 | if (declspecs->inline_p | |
da1c7394 | 4861 | && !flag_gnu89_inline |
4eb7fd83 | 4862 | && TREE_CODE (decl) == FUNCTION_DECL |
6cf59865 JJ |
4863 | && (lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (decl)) |
4864 | || current_function_decl)) | |
4eb7fd83 JJ |
4865 | { |
4866 | if (declspecs->storage_class == csc_auto && current_scope != file_scope) | |
4867 | ; | |
4868 | else if (declspecs->storage_class != csc_static) | |
4869 | DECL_EXTERNAL (decl) = !DECL_EXTERNAL (decl); | |
4870 | } | |
4eb7fd83 | 4871 | |
61f71b34 DD |
4872 | if (TREE_CODE (decl) == FUNCTION_DECL |
4873 | && targetm.calls.promote_prototypes (TREE_TYPE (decl))) | |
4874 | { | |
f8893e47 | 4875 | struct c_declarator *ce = declarator; |
61f71b34 | 4876 | |
f8893e47 JM |
4877 | if (ce->kind == cdk_pointer) |
4878 | ce = declarator->declarator; | |
4879 | if (ce->kind == cdk_function) | |
61f71b34 | 4880 | { |
f8893e47 | 4881 | tree args = ce->u.arg_info->parms; |
910ad8de | 4882 | for (; args; args = DECL_CHAIN (args)) |
61f71b34 DD |
4883 | { |
4884 | tree type = TREE_TYPE (args); | |
1f4f60fc | 4885 | if (type && INTEGRAL_TYPE_P (type) |
61f71b34 | 4886 | && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) |
267bac10 | 4887 | DECL_ARG_TYPE (args) = c_type_promotes_to (type); |
61f71b34 DD |
4888 | } |
4889 | } | |
4890 | } | |
4891 | ||
9162542e AO |
4892 | if (TREE_CODE (decl) == FUNCTION_DECL |
4893 | && DECL_DECLARED_INLINE_P (decl) | |
4894 | && DECL_UNINLINABLE (decl) | |
4895 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl))) | |
dee15844 JM |
4896 | warning (OPT_Wattributes, "inline function %q+D given attribute noinline", |
4897 | decl); | |
9162542e | 4898 | |
71113fcd GK |
4899 | /* C99 6.7.4p3: An inline definition of a function with external |
4900 | linkage shall not contain a definition of a modifiable object | |
4901 | with static storage duration... */ | |
0ae9bd27 | 4902 | if (VAR_P (decl) |
71113fcd GK |
4903 | && current_scope != file_scope |
4904 | && TREE_STATIC (decl) | |
1033ffa8 | 4905 | && !TREE_READONLY (decl) |
71113fcd GK |
4906 | && DECL_DECLARED_INLINE_P (current_function_decl) |
4907 | && DECL_EXTERNAL (current_function_decl)) | |
991d6621 JM |
4908 | record_inline_static (input_location, current_function_decl, |
4909 | decl, csi_modifiable); | |
71113fcd | 4910 | |
21b634ae MP |
4911 | if (c_dialect_objc () |
4912 | && VAR_OR_FUNCTION_DECL_P (decl)) | |
a6341d57 NP |
4913 | objc_check_global_decl (decl); |
4914 | ||
f8521984 | 4915 | /* Add this decl to the current scope. |
51e29401 RS |
4916 | TEM may equal DECL or it may be a previous decl of the same name. */ |
4917 | tem = pushdecl (decl); | |
4918 | ||
c1bbfd3c DJ |
4919 | if (initialized && DECL_EXTERNAL (tem)) |
4920 | { | |
4921 | DECL_EXTERNAL (tem) = 0; | |
4922 | TREE_STATIC (tem) = 1; | |
4923 | } | |
bbbcb2e1 | 4924 | |
51e29401 RS |
4925 | return tem; |
4926 | } | |
4927 | ||
51f4ec66 SZ |
4928 | /* Subroutine of finish_decl. TYPE is the type of an uninitialized object |
4929 | DECL or the non-array element type if DECL is an uninitialized array. | |
4930 | If that type has a const member, diagnose this. */ | |
4931 | ||
4932 | static void | |
4933 | diagnose_uninitialized_cst_member (tree decl, tree type) | |
4934 | { | |
4935 | tree field; | |
4936 | for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) | |
4937 | { | |
4938 | tree field_type; | |
4939 | if (TREE_CODE (field) != FIELD_DECL) | |
4940 | continue; | |
4941 | field_type = strip_array_types (TREE_TYPE (field)); | |
4942 | ||
4943 | if (TYPE_QUALS (field_type) & TYPE_QUAL_CONST) | |
4944 | { | |
4945 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
4946 | "uninitialized const member in %qT is invalid in C++", | |
4947 | strip_array_types (TREE_TYPE (decl))); | |
4948 | inform (DECL_SOURCE_LOCATION (field), "%qD should be initialized", field); | |
4949 | } | |
4950 | ||
3e636daf | 4951 | if (RECORD_OR_UNION_TYPE_P (field_type)) |
51f4ec66 SZ |
4952 | diagnose_uninitialized_cst_member (decl, field_type); |
4953 | } | |
4954 | } | |
4955 | ||
51e29401 RS |
4956 | /* Finish processing of a declaration; |
4957 | install its initial value. | |
bbbbb16a | 4958 | If ORIGTYPE is not NULL_TREE, it is the original type of INIT. |
51e29401 | 4959 | If the length of an array type is not known before, |
c2255bc4 AH |
4960 | it must be determined now, from the initial value, or it is an error. |
4961 | ||
4962 | INIT_LOC is the location of the initial value. */ | |
51e29401 RS |
4963 | |
4964 | void | |
c2255bc4 | 4965 | finish_decl (tree decl, location_t init_loc, tree init, |
21b634ae | 4966 | tree origtype, tree asmspec_tree) |
51e29401 | 4967 | { |
aa24028d | 4968 | tree type; |
3fa8871b | 4969 | bool was_incomplete = (DECL_SIZE (decl) == NULL_TREE); |
520a57c8 | 4970 | const char *asmspec = 0; |
51e29401 | 4971 | |
6d2f8887 | 4972 | /* If a name was specified, get the string. */ |
21b634ae | 4973 | if (VAR_OR_FUNCTION_DECL_P (decl) |
1ae57298 | 4974 | && DECL_FILE_SCOPE_P (decl)) |
41c64394 | 4975 | asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree); |
51e29401 | 4976 | if (asmspec_tree) |
72f5a12b | 4977 | asmspec = TREE_STRING_POINTER (asmspec_tree); |
51e29401 | 4978 | |
0ae9bd27 | 4979 | if (VAR_P (decl) |
b646ba3f DS |
4980 | && TREE_STATIC (decl) |
4981 | && global_bindings_p ()) | |
4982 | /* So decl is a global variable. Record the types it uses | |
4983 | so that we can decide later to emit debug info for them. */ | |
4984 | record_types_used_by_current_var_decl (decl); | |
4985 | ||
51e29401 | 4986 | /* If `start_decl' didn't like having an initialization, ignore it now. */ |
3fa8871b MP |
4987 | if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE) |
4988 | init = NULL_TREE; | |
35b1a6fa | 4989 | |
51e29401 RS |
4990 | /* Don't crash if parm is initialized. */ |
4991 | if (TREE_CODE (decl) == PARM_DECL) | |
3fa8871b | 4992 | init = NULL_TREE; |
51e29401 RS |
4993 | |
4994 | if (init) | |
c2255bc4 | 4995 | store_init_value (init_loc, decl, init, origtype); |
51e29401 | 4996 | |
21b634ae | 4997 | if (c_dialect_objc () && (VAR_OR_FUNCTION_DECL_P (decl) |
0e6df31e | 4998 | || TREE_CODE (decl) == FIELD_DECL)) |
264fa2db ZL |
4999 | objc_check_decl (decl); |
5000 | ||
aa24028d AP |
5001 | type = TREE_TYPE (decl); |
5002 | ||
6614fd40 | 5003 | /* Deduce size of array from initialization, if not already known. */ |
51e29401 | 5004 | if (TREE_CODE (type) == ARRAY_TYPE |
3fa8871b | 5005 | && TYPE_DOMAIN (type) == NULL_TREE |
51e29401 RS |
5006 | && TREE_CODE (decl) != TYPE_DECL) |
5007 | { | |
aab038d5 | 5008 | bool do_default |
51e29401 RS |
5009 | = (TREE_STATIC (decl) |
5010 | /* Even if pedantic, an external linkage array | |
5011 | may have incomplete type at first. */ | |
5012 | ? pedantic && !TREE_PUBLIC (decl) | |
1394aabd | 5013 | : !DECL_EXTERNAL (decl)); |
51e29401 | 5014 | int failure |
aab038d5 RH |
5015 | = complete_array_type (&TREE_TYPE (decl), DECL_INITIAL (decl), |
5016 | do_default); | |
51e29401 RS |
5017 | |
5018 | /* Get the completed type made by complete_array_type. */ | |
5019 | type = TREE_TYPE (decl); | |
5020 | ||
317a9ac3 | 5021 | switch (failure) |
51e29401 | 5022 | { |
317a9ac3 | 5023 | case 1: |
dee15844 | 5024 | error ("initializer fails to determine size of %q+D", decl); |
317a9ac3 RH |
5025 | break; |
5026 | ||
5027 | case 2: | |
51e29401 | 5028 | if (do_default) |
dee15844 | 5029 | error ("array size missing in %q+D", decl); |
317a9ac3 RH |
5030 | break; |
5031 | ||
5032 | case 3: | |
dee15844 | 5033 | error ("zero or negative size array %q+D", decl); |
317a9ac3 RH |
5034 | break; |
5035 | ||
5036 | case 0: | |
5037 | /* For global variables, update the copy of the type that | |
5038 | exists in the binding. */ | |
5039 | if (TREE_PUBLIC (decl)) | |
5040 | { | |
5041 | struct c_binding *b_ext = I_SYMBOL_BINDING (DECL_NAME (decl)); | |
5042 | while (b_ext && !B_IN_EXTERNAL_SCOPE (b_ext)) | |
5043 | b_ext = b_ext->shadowed; | |
0b05329b | 5044 | if (b_ext && TREE_CODE (decl) == TREE_CODE (b_ext->decl)) |
317a9ac3 | 5045 | { |
2609a0ce | 5046 | if (b_ext->u.type && comptypes (b_ext->u.type, type)) |
e1b7793c | 5047 | b_ext->u.type = composite_type (b_ext->u.type, type); |
317a9ac3 | 5048 | else |
e1b7793c | 5049 | b_ext->u.type = type; |
317a9ac3 RH |
5050 | } |
5051 | } | |
5052 | break; | |
5053 | ||
5054 | default: | |
5055 | gcc_unreachable (); | |
51e29401 | 5056 | } |
51e29401 | 5057 | |
aab038d5 RH |
5058 | if (DECL_INITIAL (decl)) |
5059 | TREE_TYPE (DECL_INITIAL (decl)) = type; | |
5060 | ||
156030d3 | 5061 | relayout_decl (decl); |
51e29401 RS |
5062 | } |
5063 | ||
b5764229 BE |
5064 | if (TREE_CODE (type) == ARRAY_TYPE |
5065 | && TYPE_STRING_FLAG (TREE_TYPE (type)) | |
5066 | && DECL_INITIAL (decl) | |
5067 | && TREE_CODE (DECL_INITIAL (decl)) == CONSTRUCTOR) | |
5068 | DECL_INITIAL (decl) = braced_list_to_string (type, DECL_INITIAL (decl)); | |
5069 | ||
0ae9bd27 | 5070 | if (VAR_P (decl)) |
51e29401 | 5071 | { |
1f0f7ceb RS |
5072 | if (init && TREE_CODE (init) == CONSTRUCTOR) |
5073 | add_flexible_array_elts_to_size (decl, init); | |
5074 | ||
6d900107 BE |
5075 | complete_flexible_array_elts (DECL_INITIAL (decl)); |
5076 | ||
3fa8871b | 5077 | if (DECL_SIZE (decl) == NULL_TREE && TREE_TYPE (decl) != error_mark_node |
f4fce7ed | 5078 | && COMPLETE_TYPE_P (TREE_TYPE (decl))) |
d575f110 RS |
5079 | layout_decl (decl, 0); |
5080 | ||
3fa8871b | 5081 | if (DECL_SIZE (decl) == NULL_TREE |
f4fce7ed JW |
5082 | /* Don't give an error if we already gave one earlier. */ |
5083 | && TREE_TYPE (decl) != error_mark_node | |
a7f64d52 | 5084 | && (TREE_STATIC (decl) |
0e6df31e GK |
5085 | /* A static variable with an incomplete type |
5086 | is an error if it is initialized. | |
5087 | Also if it is not file scope. | |
5088 | Otherwise, let it through, but if it is not `extern' | |
5089 | then it may cause an error message later. */ | |
3fa8871b | 5090 | ? (DECL_INITIAL (decl) != NULL_TREE |
4b1e44be | 5091 | || !DECL_FILE_SCOPE_P (decl)) |
0e6df31e GK |
5092 | /* An automatic variable with an incomplete type |
5093 | is an error. */ | |
5094 | : !DECL_EXTERNAL (decl))) | |
5095 | { | |
dee15844 | 5096 | error ("storage size of %q+D isn%'t known", decl); |
0e6df31e GK |
5097 | TREE_TYPE (decl) = error_mark_node; |
5098 | } | |
51e29401 | 5099 | |
d25c7690 PK |
5100 | if ((RECORD_OR_UNION_TYPE_P (TREE_TYPE (decl)) |
5101 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
5102 | && DECL_SIZE (decl) == NULL_TREE | |
5103 | && TREE_STATIC (decl)) | |
5104 | incomplete_record_decls.safe_push (decl); | |
5105 | ||
3fa8871b | 5106 | if (is_global_var (decl) && DECL_SIZE (decl) != NULL_TREE) |
e681c5a1 RS |
5107 | { |
5108 | if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST) | |
5109 | constant_expression_warning (DECL_SIZE (decl)); | |
5110 | else | |
b97d8153 JJ |
5111 | { |
5112 | error ("storage size of %q+D isn%'t constant", decl); | |
5113 | TREE_TYPE (decl) = error_mark_node; | |
5114 | } | |
e681c5a1 | 5115 | } |
e9a25f70 | 5116 | |
6645c3fa | 5117 | if (TREE_USED (type)) |
ebfbbdc5 JJ |
5118 | { |
5119 | TREE_USED (decl) = 1; | |
5120 | DECL_READ_P (decl) = 1; | |
5121 | } | |
51e29401 RS |
5122 | } |
5123 | ||
9661b15f | 5124 | /* If this is a function and an assembler name is specified, reset DECL_RTL |
e79983f4 | 5125 | so we can give it its new name. Also, update builtin_decl if it |
9661b15f | 5126 | was a normal built-in. */ |
3c4afaa5 | 5127 | if (TREE_CODE (decl) == FUNCTION_DECL && asmspec) |
6645c3fa | 5128 | { |
9661b15f | 5129 | if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL) |
b482789c | 5130 | set_builtin_user_assembler_name (decl, asmspec); |
0e6df31e | 5131 | set_user_assembler_name (decl, asmspec); |
6645c3fa | 5132 | } |
3c4afaa5 | 5133 | |
d05cc98e | 5134 | /* If #pragma weak was used, mark the decl weak now. */ |
3693d46c | 5135 | maybe_apply_pragma_weak (decl); |
d05cc98e | 5136 | |
51e29401 RS |
5137 | /* Output the assembler code and/or RTL code for variables and functions, |
5138 | unless the type is an undefined structure or union. | |
5139 | If not, it will get done when the type is completed. */ | |
5140 | ||
21b634ae | 5141 | if (VAR_OR_FUNCTION_DECL_P (decl)) |
51e29401 | 5142 | { |
b9e75696 JM |
5143 | /* Determine the ELF visibility. */ |
5144 | if (TREE_PUBLIC (decl)) | |
5145 | c_determine_visibility (decl); | |
5146 | ||
0f7866e7 | 5147 | /* This is a no-op in c-lang.c or something real in objc-act.c. */ |
37fa72e9 | 5148 | if (c_dialect_objc ()) |
0f7866e7 | 5149 | objc_check_decl (decl); |
8f17b5c5 | 5150 | |
c22cacf3 | 5151 | if (asmspec) |
0e6df31e GK |
5152 | { |
5153 | /* If this is not a static variable, issue a warning. | |
5154 | It doesn't make any sense to give an ASMSPEC for an | |
5155 | ordinary, non-register local variable. Historically, | |
5156 | GCC has accepted -- but ignored -- the ASMSPEC in | |
5157 | this case. */ | |
3f75a254 | 5158 | if (!DECL_FILE_SCOPE_P (decl) |
0ae9bd27 | 5159 | && VAR_P (decl) |
0e6df31e GK |
5160 | && !C_DECL_REGISTER (decl) |
5161 | && !TREE_STATIC (decl)) | |
dee15844 JM |
5162 | warning (0, "ignoring asm-specifier for non-static local " |
5163 | "variable %q+D", decl); | |
0e6df31e GK |
5164 | else |
5165 | set_user_assembler_name (decl, asmspec); | |
5166 | } | |
c22cacf3 | 5167 | |
4b1e44be | 5168 | if (DECL_FILE_SCOPE_P (decl)) |
8cf8d8a2 JM |
5169 | { |
5170 | if (DECL_INITIAL (decl) == NULL_TREE | |
5171 | || DECL_INITIAL (decl) == error_mark_node) | |
5172 | /* Don't output anything | |
5173 | when a tentative file-scope definition is seen. | |
5174 | But at end of compilation, do output code for them. */ | |
5175 | DECL_DEFER_OUTPUT (decl) = 1; | |
10fa8dfb | 5176 | if (asmspec && VAR_P (decl) && C_DECL_REGISTER (decl)) |
6d6c9525 | 5177 | DECL_HARD_REGISTER (decl) = 1; |
0e6df31e | 5178 | rest_of_decl_compilation (decl, true, 0); |
8cf8d8a2 | 5179 | } |
8f17b5c5 MM |
5180 | else |
5181 | { | |
0e6df31e GK |
5182 | /* In conjunction with an ASMSPEC, the `register' |
5183 | keyword indicates that we should place the variable | |
5184 | in a particular register. */ | |
5185 | if (asmspec && C_DECL_REGISTER (decl)) | |
3645c4dc | 5186 | { |
0e6df31e GK |
5187 | DECL_HARD_REGISTER (decl) = 1; |
5188 | /* This cannot be done for a structure with volatile | |
5189 | fields, on which DECL_REGISTER will have been | |
5190 | reset. */ | |
5191 | if (!DECL_REGISTER (decl)) | |
5192 | error ("cannot put object with volatile field into register"); | |
3645c4dc | 5193 | } |
0adc3c19 | 5194 | |
c0a4369a | 5195 | if (TREE_CODE (decl) != FUNCTION_DECL) |
174283a3 RH |
5196 | { |
5197 | /* If we're building a variable sized type, and we might be | |
5198 | reachable other than via the top of the current binding | |
5199 | level, then create a new BIND_EXPR so that we deallocate | |
5200 | the object at the right time. */ | |
5201 | /* Note that DECL_SIZE can be null due to errors. */ | |
5202 | if (DECL_SIZE (decl) | |
5203 | && !TREE_CONSTANT (DECL_SIZE (decl)) | |
5204 | && STATEMENT_LIST_HAS_LABEL (cur_stmt_list)) | |
5205 | { | |
5206 | tree bind; | |
53fb4de3 | 5207 | bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, NULL); |
174283a3 RH |
5208 | TREE_SIDE_EFFECTS (bind) = 1; |
5209 | add_stmt (bind); | |
5210 | BIND_EXPR_BODY (bind) = push_stmt_list (); | |
5211 | } | |
c2255bc4 AH |
5212 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), |
5213 | DECL_EXPR, decl)); | |
174283a3 | 5214 | } |
8f17b5c5 | 5215 | } |
c22cacf3 | 5216 | |
4dd7201e | 5217 | |
4b1e44be | 5218 | if (!DECL_FILE_SCOPE_P (decl)) |
51e29401 RS |
5219 | { |
5220 | /* Recompute the RTL of a local array now | |
5221 | if it used to be an incomplete type. */ | |
62f9079a | 5222 | if (was_incomplete && !is_global_var (decl)) |
51e29401 RS |
5223 | { |
5224 | /* If we used it already as memory, it must stay in memory. */ | |
5225 | TREE_ADDRESSABLE (decl) = TREE_USED (decl); | |
5226 | /* If it's still incomplete now, no init will save it. */ | |
3fa8871b MP |
5227 | if (DECL_SIZE (decl) == NULL_TREE) |
5228 | DECL_INITIAL (decl) = NULL_TREE; | |
51e29401 | 5229 | } |
51e29401 RS |
5230 | } |
5231 | } | |
5232 | ||
5233 | if (TREE_CODE (decl) == TYPE_DECL) | |
1c9766da RK |
5234 | { |
5235 | if (!DECL_FILE_SCOPE_P (decl) | |
5377d5ba | 5236 | && variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) |
c2255bc4 | 5237 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl)); |
1c9766da | 5238 | |
0e6df31e | 5239 | rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl), 0); |
1c9766da | 5240 | } |
51e29401 | 5241 | |
0bfa5f65 | 5242 | /* Install a cleanup (aka destructor) if one was given. */ |
0ae9bd27 | 5243 | if (VAR_P (decl) && !TREE_STATIC (decl)) |
0bfa5f65 RH |
5244 | { |
5245 | tree attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl)); | |
5246 | if (attr) | |
5247 | { | |
0bfa5f65 RH |
5248 | tree cleanup_id = TREE_VALUE (TREE_VALUE (attr)); |
5249 | tree cleanup_decl = lookup_name (cleanup_id); | |
5250 | tree cleanup; | |
9771b263 | 5251 | vec<tree, va_gc> *v; |
0bfa5f65 RH |
5252 | |
5253 | /* Build "cleanup(&decl)" for the destructor. */ | |
e51fbec3 | 5254 | cleanup = build_unary_op (input_location, ADDR_EXPR, decl, false); |
9771b263 DN |
5255 | vec_alloc (v, 1); |
5256 | v->quick_push (cleanup); | |
8edbfaa6 JJ |
5257 | cleanup = c_build_function_call_vec (DECL_SOURCE_LOCATION (decl), |
5258 | vNULL, cleanup_decl, v, NULL); | |
9771b263 | 5259 | vec_free (v); |
0bfa5f65 RH |
5260 | |
5261 | /* Don't warn about decl unused; the cleanup uses it. */ | |
5262 | TREE_USED (decl) = 1; | |
325c3691 | 5263 | TREE_USED (cleanup_decl) = 1; |
ebfbbdc5 | 5264 | DECL_READ_P (decl) = 1; |
0bfa5f65 | 5265 | |
325c3691 | 5266 | push_cleanup (decl, cleanup, false); |
0bfa5f65 RH |
5267 | } |
5268 | } | |
642324bb ILT |
5269 | |
5270 | if (warn_cxx_compat | |
0ae9bd27 | 5271 | && VAR_P (decl) |
642324bb ILT |
5272 | && !DECL_EXTERNAL (decl) |
5273 | && DECL_INITIAL (decl) == NULL_TREE) | |
51f4ec66 SZ |
5274 | { |
5275 | type = strip_array_types (type); | |
5276 | if (TREE_READONLY (decl)) | |
5277 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
5278 | "uninitialized const %qD is invalid in C++", decl); | |
3e636daf | 5279 | else if (RECORD_OR_UNION_TYPE_P (type) |
51f4ec66 SZ |
5280 | && C_TYPE_FIELDS_READONLY (type)) |
5281 | diagnose_uninitialized_cst_member (decl, type); | |
5282 | } | |
4309e92c | 5283 | |
9b452033 JJ |
5284 | if (flag_openmp |
5285 | && VAR_P (decl) | |
5286 | && lookup_attribute ("omp declare target implicit", | |
5287 | DECL_ATTRIBUTES (decl))) | |
5288 | { | |
5289 | DECL_ATTRIBUTES (decl) | |
5290 | = remove_attribute ("omp declare target implicit", | |
5291 | DECL_ATTRIBUTES (decl)); | |
5292 | if (!lang_hooks.types.omp_mappable_type (TREE_TYPE (decl))) | |
5293 | error ("%q+D in declare target directive does not have mappable type", | |
5294 | decl); | |
5295 | else if (!lookup_attribute ("omp declare target", | |
5296 | DECL_ATTRIBUTES (decl)) | |
5297 | && !lookup_attribute ("omp declare target link", | |
5298 | DECL_ATTRIBUTES (decl))) | |
5299 | DECL_ATTRIBUTES (decl) | |
5300 | = tree_cons (get_identifier ("omp declare target"), | |
5301 | NULL_TREE, DECL_ATTRIBUTES (decl)); | |
5302 | } | |
5303 | ||
5304 | invoke_plugin_callbacks (PLUGIN_FINISH_DECL, decl); | |
51e29401 RS |
5305 | } |
5306 | ||
a04a722b JM |
5307 | /* Given a parsed parameter declaration, decode it into a PARM_DECL. |
5308 | EXPR is NULL or a pointer to an expression that needs to be | |
5309 | evaluated for the side effects of array size expressions in the | |
5310 | parameters. */ | |
c34be55e ZL |
5311 | |
5312 | tree | |
a04a722b | 5313 | grokparm (const struct c_parm *parm, tree *expr) |
c34be55e | 5314 | { |
b9baeecd | 5315 | tree attrs = parm->attrs; |
f8893e47 | 5316 | tree decl = grokdeclarator (parm->declarator, parm->specs, PARM, false, |
a04a722b | 5317 | NULL, &attrs, expr, NULL, DEPRECATED_NORMAL); |
c34be55e | 5318 | |
b9baeecd | 5319 | decl_attributes (&decl, attrs, 0); |
c34be55e ZL |
5320 | |
5321 | return decl; | |
5322 | } | |
5323 | ||
55d54003 | 5324 | /* Given a parsed parameter declaration, decode it into a PARM_DECL |
a04a722b JM |
5325 | and push that on the current scope. EXPR is a pointer to an |
5326 | expression that needs to be evaluated for the side effects of array | |
5327 | size expressions in the parameters. */ | |
51e29401 RS |
5328 | |
5329 | void | |
a04a722b | 5330 | push_parm_decl (const struct c_parm *parm, tree *expr) |
51e29401 | 5331 | { |
b9baeecd | 5332 | tree attrs = parm->attrs; |
6cc902a1 | 5333 | tree decl; |
14077d68 | 5334 | |
0da300cd | 5335 | decl = grokdeclarator (parm->declarator, parm->specs, PARM, false, NULL, |
a04a722b | 5336 | &attrs, expr, NULL, DEPRECATED_NORMAL); |
8139a48e DM |
5337 | if (decl && DECL_P (decl)) |
5338 | DECL_SOURCE_LOCATION (decl) = parm->loc; | |
b9baeecd | 5339 | decl_attributes (&decl, attrs, 0); |
6a5ed5bf | 5340 | |
51e29401 RS |
5341 | decl = pushdecl (decl); |
5342 | ||
c2255bc4 | 5343 | finish_decl (decl, input_location, NULL_TREE, NULL_TREE, NULL_TREE); |
51e29401 RS |
5344 | } |
5345 | ||
f75fbaf7 | 5346 | /* Mark all the parameter declarations to date as forward decls. |
f91f41b2 | 5347 | Also diagnose use of this extension. */ |
51e29401 RS |
5348 | |
5349 | void | |
55d54003 | 5350 | mark_forward_parm_decls (void) |
51e29401 | 5351 | { |
f75fbaf7 | 5352 | struct c_binding *b; |
55d54003 ZW |
5353 | |
5354 | if (pedantic && !current_scope->warned_forward_parm_decls) | |
5355 | { | |
c1771a20 | 5356 | pedwarn (input_location, OPT_Wpedantic, |
509c9d60 | 5357 | "ISO C forbids forward parameter declarations"); |
55d54003 ZW |
5358 | current_scope->warned_forward_parm_decls = true; |
5359 | } | |
5360 | ||
f75fbaf7 ZW |
5361 | for (b = current_scope->bindings; b; b = b->prev) |
5362 | if (TREE_CODE (b->decl) == PARM_DECL) | |
5363 | TREE_ASM_WRITTEN (b->decl) = 1; | |
51e29401 RS |
5364 | } |
5365 | \f | |
db3acfa5 JM |
5366 | /* Build a COMPOUND_LITERAL_EXPR. TYPE is the type given in the compound |
5367 | literal, which may be an incomplete array type completed by the | |
c2255bc4 | 5368 | initializer; INIT is a CONSTRUCTOR at LOC that initializes the compound |
928c19bb | 5369 | literal. NON_CONST is true if the initializers contain something |
4b2b493f JM |
5370 | that cannot occur in a constant expression. If ALIGNAS_ALIGN is nonzero, |
5371 | it is the (valid) alignment for this compound literal, as specified | |
5372 | with _Alignas. */ | |
db3acfa5 JM |
5373 | |
5374 | tree | |
4b2b493f JM |
5375 | build_compound_literal (location_t loc, tree type, tree init, bool non_const, |
5376 | unsigned int alignas_align) | |
db3acfa5 JM |
5377 | { |
5378 | /* We do not use start_decl here because we have a type, not a declarator; | |
5379 | and do not use finish_decl because the decl should be stored inside | |
350fae66 | 5380 | the COMPOUND_LITERAL_EXPR rather than added elsewhere as a DECL_EXPR. */ |
ef787822 | 5381 | tree decl; |
db3acfa5 | 5382 | tree complit; |
8d37a5c0 | 5383 | tree stmt; |
ef787822 | 5384 | |
3e23fb2e AP |
5385 | if (type == error_mark_node |
5386 | || init == error_mark_node) | |
ef787822 JM |
5387 | return error_mark_node; |
5388 | ||
c2255bc4 | 5389 | decl = build_decl (loc, VAR_DECL, NULL_TREE, type); |
db3acfa5 JM |
5390 | DECL_EXTERNAL (decl) = 0; |
5391 | TREE_PUBLIC (decl) = 0; | |
f75fbaf7 | 5392 | TREE_STATIC (decl) = (current_scope == file_scope); |
db3acfa5 JM |
5393 | DECL_CONTEXT (decl) = current_function_decl; |
5394 | TREE_USED (decl) = 1; | |
ebfbbdc5 | 5395 | DECL_READ_P (decl) = 1; |
142473df MP |
5396 | DECL_ARTIFICIAL (decl) = 1; |
5397 | DECL_IGNORED_P (decl) = 1; | |
db3acfa5 | 5398 | TREE_TYPE (decl) = type; |
2a389958 | 5399 | c_apply_type_quals_to_decl (TYPE_QUALS (strip_array_types (type)), decl); |
4b2b493f JM |
5400 | if (alignas_align) |
5401 | { | |
5402 | SET_DECL_ALIGN (decl, alignas_align * BITS_PER_UNIT); | |
5403 | DECL_USER_ALIGN (decl) = 1; | |
5404 | } | |
c2255bc4 | 5405 | store_init_value (loc, decl, init, NULL_TREE); |
db3acfa5 JM |
5406 | |
5407 | if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type)) | |
5408 | { | |
aab038d5 RH |
5409 | int failure = complete_array_type (&TREE_TYPE (decl), |
5410 | DECL_INITIAL (decl), true); | |
da0fc454 MP |
5411 | /* If complete_array_type returns 3, it means that the |
5412 | initial value of the compound literal is empty. Allow it. */ | |
5413 | gcc_assert (failure == 0 || failure == 3); | |
aab038d5 RH |
5414 | |
5415 | type = TREE_TYPE (decl); | |
5416 | TREE_TYPE (DECL_INITIAL (decl)) = type; | |
db3acfa5 JM |
5417 | } |
5418 | ||
db3acfa5 | 5419 | if (type == error_mark_node || !COMPLETE_TYPE_P (type)) |
cce50861 | 5420 | { |
4f2e1536 | 5421 | c_incomplete_type_error (loc, NULL_TREE, type); |
cce50861 JJ |
5422 | return error_mark_node; |
5423 | } | |
db3acfa5 | 5424 | |
c2255bc4 | 5425 | stmt = build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl); |
aab038d5 | 5426 | complit = build1 (COMPOUND_LITERAL_EXPR, type, stmt); |
db3acfa5 JM |
5427 | TREE_SIDE_EFFECTS (complit) = 1; |
5428 | ||
5429 | layout_decl (decl, 0); | |
5430 | ||
5431 | if (TREE_STATIC (decl)) | |
5432 | { | |
3b2db49f MM |
5433 | /* This decl needs a name for the assembler output. */ |
5434 | set_compound_literal_name (decl); | |
cf3c4f56 JJ |
5435 | DECL_DEFER_OUTPUT (decl) = 1; |
5436 | DECL_COMDAT (decl) = 1; | |
cf3c4f56 | 5437 | pushdecl (decl); |
0e6df31e | 5438 | rest_of_decl_compilation (decl, 1, 0); |
db3acfa5 | 5439 | } |
b33a0cb3 JJ |
5440 | else |
5441 | pushdecl (decl); | |
db3acfa5 | 5442 | |
928c19bb JM |
5443 | if (non_const) |
5444 | { | |
5445 | complit = build2 (C_MAYBE_CONST_EXPR, type, NULL, complit); | |
5446 | C_MAYBE_CONST_EXPR_NON_CONST (complit) = 1; | |
5447 | } | |
5448 | ||
db3acfa5 JM |
5449 | return complit; |
5450 | } | |
24b97832 ILT |
5451 | |
5452 | /* Check the type of a compound literal. Here we just check that it | |
5453 | is valid for C++. */ | |
5454 | ||
5455 | void | |
c2255bc4 | 5456 | check_compound_literal_type (location_t loc, struct c_type_name *type_name) |
24b97832 | 5457 | { |
9e5b2115 PB |
5458 | if (warn_cxx_compat |
5459 | && (type_name->specs->typespec_kind == ctsk_tagdef | |
5460 | || type_name->specs->typespec_kind == ctsk_tagfirstref)) | |
24b97832 ILT |
5461 | warning_at (loc, OPT_Wc___compat, |
5462 | "defining a type in a compound literal is invalid in C++"); | |
5463 | } | |
db3acfa5 | 5464 | \f |
2984fe64 JM |
5465 | /* Determine whether TYPE is a structure with a flexible array member, |
5466 | or a union containing such a structure (possibly recursively). */ | |
5467 | ||
5468 | static bool | |
35b1a6fa | 5469 | flexible_array_type_p (tree type) |
2984fe64 JM |
5470 | { |
5471 | tree x; | |
5472 | switch (TREE_CODE (type)) | |
5473 | { | |
5474 | case RECORD_TYPE: | |
5475 | x = TYPE_FIELDS (type); | |
5476 | if (x == NULL_TREE) | |
5477 | return false; | |
910ad8de NF |
5478 | while (DECL_CHAIN (x) != NULL_TREE) |
5479 | x = DECL_CHAIN (x); | |
2984fe64 JM |
5480 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE |
5481 | && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE | |
5482 | && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE | |
5483 | && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE) | |
5484 | return true; | |
5485 | return false; | |
5486 | case UNION_TYPE: | |
910ad8de | 5487 | for (x = TYPE_FIELDS (type); x != NULL_TREE; x = DECL_CHAIN (x)) |
2984fe64 JM |
5488 | { |
5489 | if (flexible_array_type_p (TREE_TYPE (x))) | |
5490 | return true; | |
5491 | } | |
5492 | return false; | |
5493 | default: | |
5494 | return false; | |
5495 | } | |
5496 | } | |
5497 | \f | |
2ff7cce4 JM |
5498 | /* Performs sanity checks on the TYPE and WIDTH of the bit-field NAME, |
5499 | replacing with appropriate values if they are invalid. */ | |
420a9d9b | 5500 | |
2ff7cce4 | 5501 | static void |
420a9d9b MP |
5502 | check_bitfield_type_and_width (location_t loc, tree *type, tree *width, |
5503 | tree orig_name) | |
2ff7cce4 JM |
5504 | { |
5505 | tree type_mv; | |
5506 | unsigned int max_width; | |
5507 | unsigned HOST_WIDE_INT w; | |
88388a52 JM |
5508 | const char *name = (orig_name |
5509 | ? identifier_to_locale (IDENTIFIER_POINTER (orig_name)) | |
5510 | : _("<anonymous>")); | |
2ff7cce4 | 5511 | |
2ff7cce4 JM |
5512 | /* Detect and ignore out of range field width and process valid |
5513 | field widths. */ | |
d3ae6c2a | 5514 | if (!INTEGRAL_TYPE_P (TREE_TYPE (*width))) |
2ff7cce4 | 5515 | { |
420a9d9b | 5516 | error_at (loc, "bit-field %qs width not an integer constant", name); |
2ff7cce4 JM |
5517 | *width = integer_one_node; |
5518 | } | |
5519 | else | |
5520 | { | |
d3ae6c2a JM |
5521 | if (TREE_CODE (*width) != INTEGER_CST) |
5522 | { | |
5523 | *width = c_fully_fold (*width, false, NULL); | |
5524 | if (TREE_CODE (*width) == INTEGER_CST) | |
420a9d9b | 5525 | pedwarn (loc, OPT_Wpedantic, |
d3ae6c2a JM |
5526 | "bit-field %qs width not an integer constant expression", |
5527 | name); | |
5528 | } | |
5529 | if (TREE_CODE (*width) != INTEGER_CST) | |
5530 | { | |
420a9d9b | 5531 | error_at (loc, "bit-field %qs width not an integer constant", name); |
d3ae6c2a JM |
5532 | *width = integer_one_node; |
5533 | } | |
2ff7cce4 JM |
5534 | constant_expression_warning (*width); |
5535 | if (tree_int_cst_sgn (*width) < 0) | |
5536 | { | |
420a9d9b | 5537 | error_at (loc, "negative width in bit-field %qs", name); |
2ff7cce4 JM |
5538 | *width = integer_one_node; |
5539 | } | |
5540 | else if (integer_zerop (*width) && orig_name) | |
5541 | { | |
420a9d9b | 5542 | error_at (loc, "zero width for bit-field %qs", name); |
2ff7cce4 JM |
5543 | *width = integer_one_node; |
5544 | } | |
5545 | } | |
5546 | ||
5547 | /* Detect invalid bit-field type. */ | |
5548 | if (TREE_CODE (*type) != INTEGER_TYPE | |
5549 | && TREE_CODE (*type) != BOOLEAN_TYPE | |
5550 | && TREE_CODE (*type) != ENUMERAL_TYPE) | |
5551 | { | |
420a9d9b | 5552 | error_at (loc, "bit-field %qs has invalid type", name); |
2ff7cce4 JM |
5553 | *type = unsigned_type_node; |
5554 | } | |
5555 | ||
00aa1fa2 L |
5556 | if (TYPE_WARN_IF_NOT_ALIGN (*type)) |
5557 | { | |
5558 | error_at (loc, "cannot declare bit-field %qs with %<warn_if_not_aligned%> type", | |
5559 | name); | |
5560 | *type = unsigned_type_node; | |
5561 | } | |
5562 | ||
2ff7cce4 | 5563 | type_mv = TYPE_MAIN_VARIANT (*type); |
8400e75e | 5564 | if (!in_system_header_at (input_location) |
2ff7cce4 JM |
5565 | && type_mv != integer_type_node |
5566 | && type_mv != unsigned_type_node | |
f3bede71 | 5567 | && type_mv != boolean_type_node) |
420a9d9b | 5568 | pedwarn_c90 (loc, OPT_Wpedantic, |
f3bede71 | 5569 | "type of bit-field %qs is a GCC extension", name); |
2ff7cce4 | 5570 | |
02668aba | 5571 | max_width = TYPE_PRECISION (*type); |
2ff7cce4 | 5572 | |
01512446 | 5573 | if (compare_tree_int (*width, max_width) > 0) |
2ff7cce4 | 5574 | { |
420a9d9b | 5575 | error_at (loc, "width of %qs exceeds its type", name); |
2ff7cce4 | 5576 | w = max_width; |
c62c040f | 5577 | *width = build_int_cst (integer_type_node, w); |
2ff7cce4 JM |
5578 | } |
5579 | else | |
ae7e9ddd | 5580 | w = tree_to_uhwi (*width); |
2ff7cce4 | 5581 | |
6de9cd9a DN |
5582 | if (TREE_CODE (*type) == ENUMERAL_TYPE) |
5583 | { | |
5584 | struct lang_type *lt = TYPE_LANG_SPECIFIC (*type); | |
118a3a8b | 5585 | if (!lt |
807e902e KZ |
5586 | || w < tree_int_cst_min_precision (lt->enum_min, TYPE_SIGN (*type)) |
5587 | || w < tree_int_cst_min_precision (lt->enum_max, TYPE_SIGN (*type))) | |
420a9d9b | 5588 | warning_at (loc, 0, "%qs is narrower than values of its type", name); |
6de9cd9a | 5589 | } |
2ff7cce4 | 5590 | } |
0b359b01 | 5591 | |
2ff7cce4 | 5592 | \f |
50d50fc7 SP |
5593 | |
5594 | /* Print warning about variable length array if necessary. */ | |
5595 | ||
5596 | static void | |
88388a52 | 5597 | warn_variable_length_array (tree name, tree size) |
50d50fc7 | 5598 | { |
177cce46 | 5599 | if (TREE_CONSTANT (size)) |
50d50fc7 | 5600 | { |
f3bede71 | 5601 | if (name) |
177cce46 | 5602 | pedwarn_c90 (input_location, OPT_Wvla, |
88388a52 | 5603 | "ISO C90 forbids array %qE whose size " |
f3bede71 | 5604 | "can%'t be evaluated", name); |
50d50fc7 | 5605 | else |
177cce46 | 5606 | pedwarn_c90 (input_location, OPT_Wvla, "ISO C90 forbids array " |
f3bede71 | 5607 | "whose size can%'t be evaluated"); |
50d50fc7 | 5608 | } |
f3bede71 | 5609 | else |
50d50fc7 | 5610 | { |
f3bede71 | 5611 | if (name) |
177cce46 | 5612 | pedwarn_c90 (input_location, OPT_Wvla, |
f3bede71 | 5613 | "ISO C90 forbids variable length array %qE", name); |
50d50fc7 | 5614 | else |
177cce46 | 5615 | pedwarn_c90 (input_location, OPT_Wvla, "ISO C90 forbids variable " |
f3bede71 | 5616 | "length array"); |
50d50fc7 SP |
5617 | } |
5618 | } | |
5619 | ||
35aff4fb MP |
5620 | /* Print warning about defaulting to int if necessary. */ |
5621 | ||
5622 | static void | |
5623 | warn_defaults_to (location_t location, int opt, const char *gmsgid, ...) | |
5624 | { | |
5625 | diagnostic_info diagnostic; | |
5626 | va_list ap; | |
ebedc9a3 | 5627 | rich_location richloc (line_table, location); |
35aff4fb MP |
5628 | |
5629 | va_start (ap, gmsgid); | |
8a645150 | 5630 | diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc, |
35aff4fb MP |
5631 | flag_isoc99 ? DK_PEDWARN : DK_WARNING); |
5632 | diagnostic.option_index = opt; | |
56d35585 | 5633 | diagnostic_report_diagnostic (global_dc, &diagnostic); |
35aff4fb MP |
5634 | va_end (ap); |
5635 | } | |
5636 | ||
8a14afd0 BS |
5637 | /* Returns the smallest location != UNKNOWN_LOCATION in LOCATIONS, |
5638 | considering only those c_declspec_words found in LIST, which | |
5639 | must be terminated by cdw_number_of_elements. */ | |
5640 | ||
5641 | static location_t | |
5642 | smallest_type_quals_location (const location_t *locations, | |
5643 | const c_declspec_word *list) | |
5644 | { | |
5645 | location_t loc = UNKNOWN_LOCATION; | |
5646 | while (*list != cdw_number_of_elements) | |
5647 | { | |
5648 | location_t newloc = locations[*list]; | |
5649 | if (loc == UNKNOWN_LOCATION | |
5650 | || (newloc != UNKNOWN_LOCATION && newloc < loc)) | |
5651 | loc = newloc; | |
5652 | list++; | |
5653 | } | |
5654 | ||
5655 | return loc; | |
5656 | } | |
5657 | ||
51e29401 RS |
5658 | /* Given declspecs and a declarator, |
5659 | determine the name and type of the object declared | |
5660 | and construct a ..._DECL node for it. | |
5661 | (In one case we can return a ..._TYPE node instead. | |
6574d78e | 5662 | For invalid input we sometimes return NULL_TREE.) |
51e29401 | 5663 | |
deb176fa | 5664 | DECLSPECS is a c_declspecs structure for the declaration specifiers. |
51e29401 RS |
5665 | |
5666 | DECL_CONTEXT says which syntactic context this declaration is in: | |
5667 | NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL. | |
5668 | FUNCDEF for a function definition. Like NORMAL but a few different | |
5669 | error messages in each case. Return value may be zero meaning | |
5670 | this definition is too screwy to try to parse. | |
5671 | PARM for a parameter declaration (either within a function prototype | |
5672 | or before a function body). Make a PARM_DECL, or return void_type_node. | |
5673 | TYPENAME if for a typename (in a cast or sizeof). | |
5674 | Don't make a DECL node; just return the ..._TYPE node. | |
5675 | FIELD for a struct or union field; make a FIELD_DECL. | |
60919bce | 5676 | INITIALIZED is true if the decl has an initializer. |
2ff7cce4 JM |
5677 | WIDTH is non-NULL for bit-fields, and is a pointer to an INTEGER_CST node |
5678 | representing the width of the bit-field. | |
b9baeecd RS |
5679 | DECL_ATTRS points to the list of attributes that should be added to this |
5680 | decl. Any nested attributes that belong on the decl itself will be | |
5681 | added to this list. | |
928c19bb JM |
5682 | If EXPR is not NULL, any expressions that need to be evaluated as |
5683 | part of evaluating variably modified types will be stored in *EXPR. | |
5684 | If EXPR_CONST_OPERANDS is not NULL, *EXPR_CONST_OPERANDS will be | |
5685 | set to indicate whether operands in *EXPR can be used in constant | |
5686 | expressions. | |
0da300cd TT |
5687 | DEPRECATED_STATE is a deprecated_states value indicating whether |
5688 | deprecation warnings should be suppressed. | |
51e29401 RS |
5689 | |
5690 | In the TYPENAME case, DECLARATOR is really an absolute declarator. | |
5691 | It may also be so in the PARM case, for a prototype where the | |
5692 | argument type is specified but not the name. | |
5693 | ||
5694 | This function is where the complicated C meanings of `static' | |
929f3671 | 5695 | and `extern' are interpreted. */ |
51e29401 RS |
5696 | |
5697 | static tree | |
deb176fa JM |
5698 | grokdeclarator (const struct c_declarator *declarator, |
5699 | struct c_declspecs *declspecs, | |
0da300cd | 5700 | enum decl_context decl_context, bool initialized, tree *width, |
928c19bb JM |
5701 | tree *decl_attrs, tree *expr, bool *expr_const_operands, |
5702 | enum deprecated_states deprecated_state) | |
51e29401 | 5703 | { |
deb176fa | 5704 | tree type = declspecs->type; |
9a26d6ee JM |
5705 | bool threadp = declspecs->thread_p; |
5706 | enum c_storage_class storage_class = declspecs->storage_class; | |
51e29401 | 5707 | int constp; |
3932261a | 5708 | int restrictp; |
51e29401 | 5709 | int volatilep; |
267bac10 | 5710 | int atomicp; |
3932261a | 5711 | int type_quals = TYPE_UNQUALIFIED; |
88388a52 | 5712 | tree name = NULL_TREE; |
52ffd86e | 5713 | bool funcdef_flag = false; |
f8893e47 | 5714 | bool funcdef_syntax = false; |
f9551830 | 5715 | bool size_varies = false; |
98c3a782 | 5716 | tree decl_attr = declspecs->decl_attr; |
3b53cddc JM |
5717 | int array_ptr_quals = TYPE_UNQUALIFIED; |
5718 | tree array_ptr_attrs = NULL_TREE; | |
e3455240 | 5719 | bool array_parm_static = false; |
52ffd86e | 5720 | bool array_parm_vla_unspec_p = false; |
91d231cb | 5721 | tree returned_attrs = NULL_TREE; |
2ff7cce4 | 5722 | bool bitfield = width != NULL; |
85b58ca5 | 5723 | tree element_type; |
e9e32ee6 JM |
5724 | tree orig_qual_type = NULL; |
5725 | size_t orig_qual_indirect = 0; | |
f8893e47 | 5726 | struct c_arg_info *arg_info = 0; |
36c5e70a | 5727 | addr_space_t as1, as2, address_space; |
c2255bc4 | 5728 | location_t loc = UNKNOWN_LOCATION; |
928c19bb JM |
5729 | tree expr_dummy; |
5730 | bool expr_const_operands_dummy; | |
411cdbd8 | 5731 | enum c_declarator_kind first_non_attr_kind; |
d19fa6b5 | 5732 | unsigned int alignas_align = 0; |
928c19bb | 5733 | |
29ce73cb PB |
5734 | if (TREE_CODE (type) == ERROR_MARK) |
5735 | return error_mark_node; | |
928c19bb | 5736 | if (expr == NULL) |
d17680f3 JJ |
5737 | { |
5738 | expr = &expr_dummy; | |
5739 | expr_dummy = NULL_TREE; | |
5740 | } | |
928c19bb JM |
5741 | if (expr_const_operands == NULL) |
5742 | expr_const_operands = &expr_const_operands_dummy; | |
5743 | ||
d17680f3 JJ |
5744 | if (declspecs->expr) |
5745 | { | |
5746 | if (*expr) | |
5747 | *expr = build2 (COMPOUND_EXPR, TREE_TYPE (declspecs->expr), *expr, | |
5748 | declspecs->expr); | |
5749 | else | |
5750 | *expr = declspecs->expr; | |
5751 | } | |
928c19bb | 5752 | *expr_const_operands = declspecs->expr_const_operands; |
51e29401 RS |
5753 | |
5754 | if (decl_context == FUNCDEF) | |
52ffd86e | 5755 | funcdef_flag = true, decl_context = NORMAL; |
51e29401 | 5756 | |
51e29401 | 5757 | /* Look inside a declarator for the name being declared |
88388a52 | 5758 | and get it as an IDENTIFIER_NODE, for an error message. */ |
51e29401 | 5759 | { |
f8893e47 | 5760 | const struct c_declarator *decl = declarator; |
51e29401 | 5761 | |
411cdbd8 | 5762 | first_non_attr_kind = cdk_attrs; |
51e29401 | 5763 | while (decl) |
f8893e47 | 5764 | switch (decl->kind) |
51e29401 | 5765 | { |
f8893e47 | 5766 | case cdk_array: |
c2255bc4 AH |
5767 | loc = decl->id_loc; |
5768 | /* FALL THRU. */ | |
5769 | ||
5770 | case cdk_function: | |
f8893e47 JM |
5771 | case cdk_pointer: |
5772 | funcdef_syntax = (decl->kind == cdk_function); | |
411cdbd8 RG |
5773 | if (first_non_attr_kind == cdk_attrs) |
5774 | first_non_attr_kind = decl->kind; | |
e9e32ee6 | 5775 | decl = decl->declarator; |
51e29401 RS |
5776 | break; |
5777 | ||
f8893e47 JM |
5778 | case cdk_attrs: |
5779 | decl = decl->declarator; | |
91d231cb JM |
5780 | break; |
5781 | ||
f8893e47 | 5782 | case cdk_id: |
c2255bc4 | 5783 | loc = decl->id_loc; |
f8893e47 | 5784 | if (decl->u.id) |
88388a52 | 5785 | name = decl->u.id; |
411cdbd8 RG |
5786 | if (first_non_attr_kind == cdk_attrs) |
5787 | first_non_attr_kind = decl->kind; | |
51e29401 RS |
5788 | decl = 0; |
5789 | break; | |
5790 | ||
5791 | default: | |
366de0ce | 5792 | gcc_unreachable (); |
51e29401 | 5793 | } |
3fa8871b | 5794 | if (name == NULL_TREE) |
88388a52 JM |
5795 | { |
5796 | gcc_assert (decl_context == PARM | |
5797 | || decl_context == TYPENAME | |
5798 | || (decl_context == FIELD | |
5799 | && declarator->kind == cdk_id)); | |
5800 | gcc_assert (!initialized); | |
5801 | } | |
51e29401 RS |
5802 | } |
5803 | ||
5804 | /* A function definition's declarator must have the form of | |
5805 | a function declarator. */ | |
5806 | ||
f8893e47 | 5807 | if (funcdef_flag && !funcdef_syntax) |
6574d78e | 5808 | return NULL_TREE; |
51e29401 | 5809 | |
51e29401 RS |
5810 | /* If this looks like a function definition, make it one, |
5811 | even if it occurs where parms are expected. | |
5812 | Then store_parm_decls will reject it and not use it as a parm. */ | |
f75fbaf7 | 5813 | if (decl_context == NORMAL && !funcdef_flag && current_scope->parm_flag) |
51e29401 RS |
5814 | decl_context = PARM; |
5815 | ||
deb176fa | 5816 | if (declspecs->deprecated_p && deprecated_state != DEPRECATED_SUPPRESS) |
9b86d6bb | 5817 | warn_deprecated_use (declspecs->type, declspecs->decl_attr); |
51e29401 | 5818 | |
5c076987 JM |
5819 | if ((decl_context == NORMAL || decl_context == FIELD) |
5820 | && current_scope == file_scope | |
5821 | && variably_modified_type_p (type, NULL_TREE)) | |
5822 | { | |
88388a52 | 5823 | if (name) |
c2255bc4 | 5824 | error_at (loc, "variably modified %qE at file scope", name); |
88388a52 | 5825 | else |
c2255bc4 | 5826 | error_at (loc, "variably modified field at file scope"); |
5c076987 JM |
5827 | type = integer_type_node; |
5828 | } | |
5829 | ||
f9551830 | 5830 | size_varies = C_TYPE_VARIABLE_SIZE (type) != 0; |
51e29401 | 5831 | |
98c3a782 | 5832 | /* Diagnose defaulting to "int". */ |
720283f2 | 5833 | |
8400e75e | 5834 | if (declspecs->default_int_p && !in_system_header_at (input_location)) |
51e29401 | 5835 | { |
98c3a782 JM |
5836 | /* Issue a warning if this is an ISO C 99 program or if |
5837 | -Wreturn-type and this is a function, or if -Wimplicit; | |
5838 | prefer the former warning since it is more explicit. */ | |
b67b9225 | 5839 | if ((warn_implicit_int || warn_return_type > 0 || flag_isoc99) |
98c3a782 JM |
5840 | && funcdef_flag) |
5841 | warn_about_return_type = 1; | |
88388a52 JM |
5842 | else |
5843 | { | |
5844 | if (name) | |
92574c7c | 5845 | warn_defaults_to (loc, OPT_Wimplicit_int, |
35aff4fb MP |
5846 | "type defaults to %<int%> in declaration " |
5847 | "of %qE", name); | |
88388a52 | 5848 | else |
92574c7c | 5849 | warn_defaults_to (loc, OPT_Wimplicit_int, |
35aff4fb | 5850 | "type defaults to %<int%> in type name"); |
88388a52 | 5851 | } |
51e29401 RS |
5852 | } |
5853 | ||
98c3a782 JM |
5854 | /* Adjust the type if a bit-field is being declared, |
5855 | -funsigned-bitfields applied and the type is not explicitly | |
5856 | "signed". */ | |
5857 | if (bitfield && !flag_signed_bitfields && !declspecs->explicit_signed_p | |
5858 | && TREE_CODE (type) == INTEGER_TYPE) | |
726a989a | 5859 | type = unsigned_type_for (type); |
51e29401 | 5860 | |
3932261a MM |
5861 | /* Figure out the type qualifiers for the declaration. There are |
5862 | two ways a declaration can become qualified. One is something | |
5863 | like `const int i' where the `const' is explicit. Another is | |
5864 | something like `typedef const int CI; CI i' where the type of the | |
85b58ca5 JM |
5865 | declaration contains the `const'. A third possibility is that |
5866 | there is a type qualifier on the element type of a typedefed | |
5867 | array type, in which case we should extract that qualifier so | |
5f04ff80 | 5868 | that c_apply_type_quals_to_decl receives the full list of |
85b58ca5 JM |
5869 | qualifiers to work with (C90 is not entirely clear about whether |
5870 | duplicate qualifiers should be diagnosed in this case, but it | |
5871 | seems most appropriate to do so). */ | |
5872 | element_type = strip_array_types (type); | |
3b53cddc JM |
5873 | constp = declspecs->const_p + TYPE_READONLY (element_type); |
5874 | restrictp = declspecs->restrict_p + TYPE_RESTRICT (element_type); | |
5875 | volatilep = declspecs->volatile_p + TYPE_VOLATILE (element_type); | |
267bac10 | 5876 | atomicp = declspecs->atomic_p + TYPE_ATOMIC (element_type); |
36c5e70a BE |
5877 | as1 = declspecs->address_space; |
5878 | as2 = TYPE_ADDR_SPACE (element_type); | |
5879 | address_space = ADDR_SPACE_GENERIC_P (as1)? as2 : as1; | |
5880 | ||
f3bede71 MP |
5881 | if (constp > 1) |
5882 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<const%>"); | |
5883 | if (restrictp > 1) | |
5884 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<restrict%>"); | |
5885 | if (volatilep > 1) | |
5886 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<volatile%>"); | |
5887 | if (atomicp > 1) | |
5888 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<_Atomic%>"); | |
36c5e70a BE |
5889 | |
5890 | if (!ADDR_SPACE_GENERIC_P (as1) && !ADDR_SPACE_GENERIC_P (as2) && as1 != as2) | |
5891 | error_at (loc, "conflicting named address spaces (%s vs %s)", | |
5892 | c_addr_space_name (as1), c_addr_space_name (as2)); | |
5893 | ||
411cdbd8 RG |
5894 | if ((TREE_CODE (type) == ARRAY_TYPE |
5895 | || first_non_attr_kind == cdk_array) | |
5896 | && TYPE_QUALS (element_type)) | |
e9e32ee6 JM |
5897 | { |
5898 | orig_qual_type = type; | |
5899 | type = TYPE_MAIN_VARIANT (type); | |
5900 | } | |
3932261a MM |
5901 | type_quals = ((constp ? TYPE_QUAL_CONST : 0) |
5902 | | (restrictp ? TYPE_QUAL_RESTRICT : 0) | |
36c5e70a | 5903 | | (volatilep ? TYPE_QUAL_VOLATILE : 0) |
267bac10 | 5904 | | (atomicp ? TYPE_QUAL_ATOMIC : 0) |
36c5e70a | 5905 | | ENCODE_QUAL_ADDR_SPACE (address_space)); |
e9e32ee6 JM |
5906 | if (type_quals != TYPE_QUALS (element_type)) |
5907 | orig_qual_type = NULL_TREE; | |
51e29401 | 5908 | |
267bac10 JM |
5909 | /* Applying the _Atomic qualifier to an array type (through the use |
5910 | of typedefs or typeof) must be detected here. If the qualifier | |
5911 | is introduced later, any appearance of applying it to an array is | |
5912 | actually applying it to an element of that array. */ | |
49e6a6c0 | 5913 | if (declspecs->atomic_p && TREE_CODE (type) == ARRAY_TYPE) |
267bac10 JM |
5914 | error_at (loc, "%<_Atomic%>-qualified array type"); |
5915 | ||
9a26d6ee JM |
5916 | /* Warn about storage classes that are invalid for certain |
5917 | kinds of declarations (parameters, typenames, etc.). */ | |
5918 | ||
5919 | if (funcdef_flag | |
5920 | && (threadp | |
5921 | || storage_class == csc_auto | |
5922 | || storage_class == csc_register | |
5923 | || storage_class == csc_typedef)) | |
5924 | { | |
fcf73884 | 5925 | if (storage_class == csc_auto) |
b8698a0f | 5926 | pedwarn (loc, |
c1771a20 | 5927 | (current_scope == file_scope) ? 0 : OPT_Wpedantic, |
fcf73884 | 5928 | "function definition declared %<auto%>"); |
9a26d6ee | 5929 | if (storage_class == csc_register) |
c2255bc4 | 5930 | error_at (loc, "function definition declared %<register%>"); |
9a26d6ee | 5931 | if (storage_class == csc_typedef) |
c2255bc4 | 5932 | error_at (loc, "function definition declared %<typedef%>"); |
9a26d6ee | 5933 | if (threadp) |
582d9b50 JM |
5934 | error_at (loc, "function definition declared %qs", |
5935 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
5936 | threadp = false; |
5937 | if (storage_class == csc_auto | |
5938 | || storage_class == csc_register | |
5939 | || storage_class == csc_typedef) | |
5940 | storage_class = csc_none; | |
5941 | } | |
5942 | else if (decl_context != NORMAL && (storage_class != csc_none || threadp)) | |
5943 | { | |
5944 | if (decl_context == PARM && storage_class == csc_register) | |
5945 | ; | |
5946 | else | |
5947 | { | |
5948 | switch (decl_context) | |
5949 | { | |
5950 | case FIELD: | |
88388a52 | 5951 | if (name) |
c2255bc4 AH |
5952 | error_at (loc, "storage class specified for structure " |
5953 | "field %qE", name); | |
88388a52 | 5954 | else |
c2255bc4 | 5955 | error_at (loc, "storage class specified for structure field"); |
9a26d6ee JM |
5956 | break; |
5957 | case PARM: | |
88388a52 | 5958 | if (name) |
c2255bc4 AH |
5959 | error_at (loc, "storage class specified for parameter %qE", |
5960 | name); | |
88388a52 | 5961 | else |
c2255bc4 | 5962 | error_at (loc, "storage class specified for unnamed parameter"); |
9a26d6ee JM |
5963 | break; |
5964 | default: | |
c2255bc4 | 5965 | error_at (loc, "storage class specified for typename"); |
9a26d6ee JM |
5966 | break; |
5967 | } | |
5968 | storage_class = csc_none; | |
5969 | threadp = false; | |
5970 | } | |
5971 | } | |
5972 | else if (storage_class == csc_extern | |
5973 | && initialized | |
5974 | && !funcdef_flag) | |
5975 | { | |
5976 | /* 'extern' with initialization is invalid if not at file scope. */ | |
b8b47f42 GDR |
5977 | if (current_scope == file_scope) |
5978 | { | |
5979 | /* It is fine to have 'extern const' when compiling at C | |
5980 | and C++ intersection. */ | |
5981 | if (!(warn_cxx_compat && constp)) | |
c2255bc4 AH |
5982 | warning_at (loc, 0, "%qE initialized and declared %<extern%>", |
5983 | name); | |
b8b47f42 | 5984 | } |
9a26d6ee | 5985 | else |
c2255bc4 | 5986 | error_at (loc, "%qE has both %<extern%> and initializer", name); |
9a26d6ee JM |
5987 | } |
5988 | else if (current_scope == file_scope) | |
5989 | { | |
5990 | if (storage_class == csc_auto) | |
c2255bc4 AH |
5991 | error_at (loc, "file-scope declaration of %qE specifies %<auto%>", |
5992 | name); | |
9a26d6ee | 5993 | if (pedantic && storage_class == csc_register) |
c1771a20 | 5994 | pedwarn (input_location, OPT_Wpedantic, |
88388a52 | 5995 | "file-scope declaration of %qE specifies %<register%>", name); |
9a26d6ee JM |
5996 | } |
5997 | else | |
5998 | { | |
5999 | if (storage_class == csc_extern && funcdef_flag) | |
c2255bc4 | 6000 | error_at (loc, "nested function %qE declared %<extern%>", name); |
9a26d6ee JM |
6001 | else if (threadp && storage_class == csc_none) |
6002 | { | |
c2255bc4 | 6003 | error_at (loc, "function-scope %qE implicitly auto and declared " |
582d9b50 JM |
6004 | "%qs", name, |
6005 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
6006 | threadp = false; |
6007 | } | |
6008 | } | |
51e29401 RS |
6009 | |
6010 | /* Now figure out the structure of the declarator proper. | |
6011 | Descend through it, creating more complex types, until we reach | |
46df2823 JM |
6012 | the declared identifier (or NULL_TREE, in an absolute declarator). |
6013 | At each stage we maintain an unqualified version of the type | |
6014 | together with any qualifiers that should be applied to it with | |
6015 | c_build_qualified_type; this way, array types including | |
6016 | multidimensional array types are first built up in unqualified | |
6017 | form and then the qualified form is created with | |
6018 | TYPE_MAIN_VARIANT pointing to the unqualified form. */ | |
51e29401 | 6019 | |
f8893e47 | 6020 | while (declarator && declarator->kind != cdk_id) |
51e29401 RS |
6021 | { |
6022 | if (type == error_mark_node) | |
6023 | { | |
f8893e47 | 6024 | declarator = declarator->declarator; |
51e29401 RS |
6025 | continue; |
6026 | } | |
6027 | ||
f8893e47 JM |
6028 | /* Each level of DECLARATOR is either a cdk_array (for ...[..]), |
6029 | a cdk_pointer (for *...), | |
6030 | a cdk_function (for ...(...)), | |
6031 | a cdk_attrs (for nested attributes), | |
6032 | or a cdk_id (for the name being declared | |
6033 | or the place in an absolute declarator | |
51e29401 | 6034 | where the name was omitted). |
f8893e47 | 6035 | For the last case, we have just exited the loop. |
51e29401 RS |
6036 | |
6037 | At this point, TYPE is the type of elements of an array, | |
6038 | or for a function to return, or for a pointer to point to. | |
6039 | After this sequence of ifs, TYPE is the type of the | |
6040 | array or function or pointer, and DECLARATOR has had its | |
6041 | outermost layer removed. */ | |
6042 | ||
3b53cddc JM |
6043 | if (array_ptr_quals != TYPE_UNQUALIFIED |
6044 | || array_ptr_attrs != NULL_TREE | |
6045 | || array_parm_static) | |
0e03329a JM |
6046 | { |
6047 | /* Only the innermost declarator (making a parameter be of | |
6048 | array type which is converted to pointer type) | |
6049 | may have static or type qualifiers. */ | |
c2255bc4 | 6050 | error_at (loc, "static or type qualifiers in non-parameter array declarator"); |
3b53cddc JM |
6051 | array_ptr_quals = TYPE_UNQUALIFIED; |
6052 | array_ptr_attrs = NULL_TREE; | |
e3455240 | 6053 | array_parm_static = false; |
0e03329a JM |
6054 | } |
6055 | ||
f8893e47 | 6056 | switch (declarator->kind) |
51e29401 | 6057 | { |
f8893e47 | 6058 | case cdk_attrs: |
366de0ce | 6059 | { |
f8893e47 JM |
6060 | /* A declarator with embedded attributes. */ |
6061 | tree attrs = declarator->u.attrs; | |
6062 | const struct c_declarator *inner_decl; | |
366de0ce | 6063 | int attr_flags = 0; |
f8893e47 | 6064 | declarator = declarator->declarator; |
366de0ce | 6065 | inner_decl = declarator; |
f8893e47 JM |
6066 | while (inner_decl->kind == cdk_attrs) |
6067 | inner_decl = inner_decl->declarator; | |
6068 | if (inner_decl->kind == cdk_id) | |
366de0ce | 6069 | attr_flags |= (int) ATTR_FLAG_DECL_NEXT; |
f8893e47 | 6070 | else if (inner_decl->kind == cdk_function) |
366de0ce | 6071 | attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT; |
f8893e47 | 6072 | else if (inner_decl->kind == cdk_array) |
366de0ce NS |
6073 | attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT; |
6074 | returned_attrs = decl_attributes (&type, | |
6075 | chainon (returned_attrs, attrs), | |
6076 | attr_flags); | |
6077 | break; | |
6078 | } | |
f8893e47 | 6079 | case cdk_array: |
366de0ce NS |
6080 | { |
6081 | tree itype = NULL_TREE; | |
f8893e47 | 6082 | tree size = declarator->u.array.dimen; |
366de0ce NS |
6083 | /* The index is a signed object `sizetype' bits wide. */ |
6084 | tree index_type = c_common_signed_type (sizetype); | |
6085 | ||
f8893e47 | 6086 | array_ptr_quals = declarator->u.array.quals; |
3b53cddc | 6087 | array_ptr_attrs = declarator->u.array.attrs; |
f8893e47 | 6088 | array_parm_static = declarator->u.array.static_p; |
52ffd86e MS |
6089 | array_parm_vla_unspec_p = declarator->u.array.vla_unspec_p; |
6090 | ||
f8893e47 | 6091 | declarator = declarator->declarator; |
366de0ce NS |
6092 | |
6093 | /* Check for some types that there cannot be arrays of. */ | |
c22cacf3 | 6094 | |
366de0ce NS |
6095 | if (VOID_TYPE_P (type)) |
6096 | { | |
88388a52 | 6097 | if (name) |
c2255bc4 | 6098 | error_at (loc, "declaration of %qE as array of voids", name); |
88388a52 | 6099 | else |
c2255bc4 | 6100 | error_at (loc, "declaration of type name as array of voids"); |
366de0ce NS |
6101 | type = error_mark_node; |
6102 | } | |
c22cacf3 | 6103 | |
366de0ce NS |
6104 | if (TREE_CODE (type) == FUNCTION_TYPE) |
6105 | { | |
88388a52 | 6106 | if (name) |
c2255bc4 AH |
6107 | error_at (loc, "declaration of %qE as array of functions", |
6108 | name); | |
88388a52 | 6109 | else |
c2255bc4 AH |
6110 | error_at (loc, "declaration of type name as array of " |
6111 | "functions"); | |
366de0ce NS |
6112 | type = error_mark_node; |
6113 | } | |
c22cacf3 | 6114 | |
8400e75e DM |
6115 | if (pedantic && !in_system_header_at (input_location) |
6116 | && flexible_array_type_p (type)) | |
c1771a20 | 6117 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6118 | "invalid use of structure with flexible array member"); |
c22cacf3 | 6119 | |
366de0ce | 6120 | if (size == error_mark_node) |
51e29401 | 6121 | type = error_mark_node; |
c22cacf3 | 6122 | |
366de0ce NS |
6123 | if (type == error_mark_node) |
6124 | continue; | |
e9a25f70 | 6125 | |
366de0ce NS |
6126 | /* If size was specified, set ITYPE to a range-type for |
6127 | that size. Otherwise, ITYPE remains null. finish_decl | |
6128 | may figure it out from an initial value. */ | |
a25f1211 | 6129 | |
366de0ce NS |
6130 | if (size) |
6131 | { | |
928c19bb JM |
6132 | bool size_maybe_const = true; |
6133 | bool size_int_const = (TREE_CODE (size) == INTEGER_CST | |
6134 | && !TREE_OVERFLOW (size)); | |
6135 | bool this_size_varies = false; | |
6136 | ||
366de0ce NS |
6137 | /* Strip NON_LVALUE_EXPRs since we aren't using as an |
6138 | lvalue. */ | |
6139 | STRIP_TYPE_NOPS (size); | |
c22cacf3 | 6140 | |
3f75a254 | 6141 | if (!INTEGRAL_TYPE_P (TREE_TYPE (size))) |
366de0ce | 6142 | { |
88388a52 | 6143 | if (name) |
c2255bc4 | 6144 | error_at (loc, "size of array %qE has non-integer type", |
7176a4a0 | 6145 | name); |
88388a52 | 6146 | else |
c2255bc4 | 6147 | error_at (loc, |
7176a4a0 MP |
6148 | "size of unnamed array has non-integer type"); |
6149 | size = integer_one_node; | |
6150 | } | |
6151 | /* This can happen with enum forward declaration. */ | |
6152 | else if (!COMPLETE_TYPE_P (TREE_TYPE (size))) | |
6153 | { | |
6154 | if (name) | |
6155 | error_at (loc, "size of array %qE has incomplete type", | |
6156 | name); | |
6157 | else | |
6158 | error_at (loc, "size of unnamed array has incomplete " | |
6159 | "type"); | |
366de0ce NS |
6160 | size = integer_one_node; |
6161 | } | |
c22cacf3 | 6162 | |
928c19bb JM |
6163 | size = c_fully_fold (size, false, &size_maybe_const); |
6164 | ||
6165 | if (pedantic && size_maybe_const && integer_zerop (size)) | |
88388a52 JM |
6166 | { |
6167 | if (name) | |
c1771a20 | 6168 | pedwarn (loc, OPT_Wpedantic, |
88388a52 JM |
6169 | "ISO C forbids zero-size array %qE", name); |
6170 | else | |
c1771a20 | 6171 | pedwarn (loc, OPT_Wpedantic, |
88388a52 JM |
6172 | "ISO C forbids zero-size array"); |
6173 | } | |
c22cacf3 | 6174 | |
928c19bb | 6175 | if (TREE_CODE (size) == INTEGER_CST && size_maybe_const) |
366de0ce NS |
6176 | { |
6177 | constant_expression_warning (size); | |
6178 | if (tree_int_cst_sgn (size) < 0) | |
6179 | { | |
88388a52 | 6180 | if (name) |
c2255bc4 | 6181 | error_at (loc, "size of array %qE is negative", name); |
88388a52 | 6182 | else |
c2255bc4 | 6183 | error_at (loc, "size of unnamed array is negative"); |
366de0ce NS |
6184 | size = integer_one_node; |
6185 | } | |
928c19bb JM |
6186 | /* Handle a size folded to an integer constant but |
6187 | not an integer constant expression. */ | |
6188 | if (!size_int_const) | |
6189 | { | |
6ccb2a4a JM |
6190 | /* If this is a file scope declaration of an |
6191 | ordinary identifier, this is invalid code; | |
6192 | diagnosing it here and not subsequently | |
6193 | treating the type as variable-length avoids | |
6194 | more confusing diagnostics later. */ | |
6195 | if ((decl_context == NORMAL || decl_context == FIELD) | |
6196 | && current_scope == file_scope) | |
6197 | pedwarn (input_location, 0, | |
88388a52 JM |
6198 | "variably modified %qE at file scope", |
6199 | name); | |
6ccb2a4a | 6200 | else |
f9551830 | 6201 | this_size_varies = size_varies = true; |
88388a52 | 6202 | warn_variable_length_array (name, size); |
928c19bb | 6203 | } |
366de0ce | 6204 | } |
5c076987 JM |
6205 | else if ((decl_context == NORMAL || decl_context == FIELD) |
6206 | && current_scope == file_scope) | |
6207 | { | |
c2255bc4 | 6208 | error_at (loc, "variably modified %qE at file scope", name); |
5c076987 JM |
6209 | size = integer_one_node; |
6210 | } | |
366de0ce NS |
6211 | else |
6212 | { | |
6213 | /* Make sure the array size remains visibly | |
6214 | nonconstant even if it is (eg) a const variable | |
6215 | with known value. */ | |
f9551830 | 6216 | this_size_varies = size_varies = true; |
88388a52 | 6217 | warn_variable_length_array (name, size); |
45b2222a | 6218 | if (sanitize_flags_p (SANITIZE_VLA) |
f34ebeb2 | 6219 | && current_function_decl != NULL_TREE |
45b2222a | 6220 | && decl_context == NORMAL) |
b906f4ca MP |
6221 | { |
6222 | /* Evaluate the array size only once. */ | |
b2fa0a8b | 6223 | size = save_expr (size); |
b906f4ca MP |
6224 | size = c_fully_fold (size, false, NULL); |
6225 | size = fold_build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
6226 | ubsan_instrument_vla (loc, size), | |
6227 | size); | |
6228 | } | |
366de0ce | 6229 | } |
51e29401 | 6230 | |
928c19bb | 6231 | if (integer_zerop (size) && !this_size_varies) |
366de0ce | 6232 | { |
c22cacf3 MS |
6233 | /* A zero-length array cannot be represented with |
6234 | an unsigned index type, which is what we'll | |
6235 | get with build_index_type. Create an | |
6236 | open-ended range instead. */ | |
366de0ce NS |
6237 | itype = build_range_type (sizetype, size, NULL_TREE); |
6238 | } | |
6239 | else | |
6240 | { | |
8b0b9aef RH |
6241 | /* Arrange for the SAVE_EXPR on the inside of the |
6242 | MINUS_EXPR, which allows the -1 to get folded | |
6243 | with the +1 that happens when building TYPE_SIZE. */ | |
6244 | if (size_varies) | |
a04a722b | 6245 | size = save_expr (size); |
928c19bb JM |
6246 | if (this_size_varies && TREE_CODE (size) == INTEGER_CST) |
6247 | size = build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
6248 | integer_zero_node, size); | |
8b0b9aef | 6249 | |
366de0ce NS |
6250 | /* Compute the maximum valid index, that is, size |
6251 | - 1. Do the calculation in index_type, so that | |
6252 | if it is a variable the computations will be | |
6253 | done in the proper mode. */ | |
db3927fb AH |
6254 | itype = fold_build2_loc (loc, MINUS_EXPR, index_type, |
6255 | convert (index_type, size), | |
6256 | convert (index_type, | |
6257 | size_one_node)); | |
366de0ce | 6258 | |
60a45536 RG |
6259 | /* The above overflows when size does not fit |
6260 | in index_type. | |
6261 | ??? While a size of INT_MAX+1 technically shouldn't | |
6262 | cause an overflow (because we subtract 1), handling | |
6263 | this case seems like an unnecessary complication. */ | |
6264 | if (TREE_CODE (size) == INTEGER_CST | |
6265 | && !int_fits_type_p (size, index_type)) | |
366de0ce | 6266 | { |
88388a52 | 6267 | if (name) |
c2255bc4 AH |
6268 | error_at (loc, "size of array %qE is too large", |
6269 | name); | |
88388a52 | 6270 | else |
c2255bc4 | 6271 | error_at (loc, "size of unnamed array is too large"); |
366de0ce NS |
6272 | type = error_mark_node; |
6273 | continue; | |
6274 | } | |
c22cacf3 | 6275 | |
366de0ce NS |
6276 | itype = build_index_type (itype); |
6277 | } | |
928c19bb JM |
6278 | if (this_size_varies) |
6279 | { | |
6280 | if (*expr) | |
6281 | *expr = build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
6282 | *expr, size); | |
6283 | else | |
6284 | *expr = size; | |
6285 | *expr_const_operands &= size_maybe_const; | |
6286 | } | |
366de0ce NS |
6287 | } |
6288 | else if (decl_context == FIELD) | |
6289 | { | |
1de2c900 | 6290 | bool flexible_array_member = false; |
062c4bb3 JM |
6291 | if (array_parm_vla_unspec_p) |
6292 | /* Field names can in fact have function prototype | |
6293 | scope so [*] is disallowed here through making | |
6294 | the field variably modified, not through being | |
6295 | something other than a declaration with function | |
6296 | prototype scope. */ | |
f9551830 | 6297 | size_varies = true; |
1de2c900 JM |
6298 | else |
6299 | { | |
6300 | const struct c_declarator *t = declarator; | |
6301 | while (t->kind == cdk_attrs) | |
6302 | t = t->declarator; | |
6303 | flexible_array_member = (t->kind == cdk_id); | |
6304 | } | |
6305 | if (flexible_array_member | |
8400e75e | 6306 | && !in_system_header_at (input_location)) |
f3bede71 MP |
6307 | pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not " |
6308 | "support flexible array members"); | |
c7b82833 | 6309 | |
366de0ce NS |
6310 | /* ISO C99 Flexible array members are effectively |
6311 | identical to GCC's zero-length array extension. */ | |
1de2c900 JM |
6312 | if (flexible_array_member || array_parm_vla_unspec_p) |
6313 | itype = build_range_type (sizetype, size_zero_node, | |
6314 | NULL_TREE); | |
366de0ce | 6315 | } |
52ffd86e MS |
6316 | else if (decl_context == PARM) |
6317 | { | |
6318 | if (array_parm_vla_unspec_p) | |
6319 | { | |
52ffd86e | 6320 | itype = build_range_type (sizetype, size_zero_node, NULL_TREE); |
f9551830 | 6321 | size_varies = true; |
52ffd86e MS |
6322 | } |
6323 | } | |
8d9f82d5 AO |
6324 | else if (decl_context == TYPENAME) |
6325 | { | |
6326 | if (array_parm_vla_unspec_p) | |
6327 | { | |
062c4bb3 JM |
6328 | /* C99 6.7.5.2p4 */ |
6329 | warning (0, "%<[*]%> not in a declaration"); | |
6330 | /* We use this to avoid messing up with incomplete | |
6331 | array types of the same type, that would | |
6332 | otherwise be modified below. */ | |
8d9f82d5 AO |
6333 | itype = build_range_type (sizetype, size_zero_node, |
6334 | NULL_TREE); | |
f9551830 | 6335 | size_varies = true; |
8d9f82d5 AO |
6336 | } |
6337 | } | |
51e29401 | 6338 | |
636b4106 | 6339 | /* Complain about arrays of incomplete types. */ |
b4519d39 SB |
6340 | if (!COMPLETE_TYPE_P (type)) |
6341 | { | |
e5d9235b MP |
6342 | error_at (loc, "array type has incomplete element type %qT", |
6343 | type); | |
00083992 MP |
6344 | /* See if we can be more helpful. */ |
6345 | if (TREE_CODE (type) == ARRAY_TYPE) | |
6346 | { | |
6347 | if (name) | |
6348 | inform (loc, "declaration of %qE as multidimensional " | |
6349 | "array must have bounds for all dimensions " | |
6350 | "except the first", name); | |
6351 | else | |
6352 | inform (loc, "declaration of multidimensional array " | |
6353 | "must have bounds for all dimensions except " | |
6354 | "the first"); | |
6355 | } | |
c22cacf3 | 6356 | type = error_mark_node; |
b4519d39 SB |
6357 | } |
6358 | else | |
8d9f82d5 AO |
6359 | /* When itype is NULL, a shared incomplete array type is |
6360 | returned for all array of a given type. Elsewhere we | |
6361 | make sure we don't complete that type before copying | |
6362 | it, but here we want to make sure we don't ever | |
6363 | modify the shared type, so we gcc_assert (itype) | |
6364 | below. */ | |
36c5e70a BE |
6365 | { |
6366 | addr_space_t as = DECODE_QUAL_ADDR_SPACE (type_quals); | |
6367 | if (!ADDR_SPACE_GENERIC_P (as) && as != TYPE_ADDR_SPACE (type)) | |
6368 | type = build_qualified_type (type, | |
6369 | ENCODE_QUAL_ADDR_SPACE (as)); | |
6370 | ||
6371 | type = build_array_type (type, itype); | |
6372 | } | |
51e29401 | 6373 | |
9df594d7 | 6374 | if (type != error_mark_node) |
366de0ce | 6375 | { |
9df594d7 | 6376 | if (size_varies) |
5c076987 | 6377 | { |
8d9f82d5 AO |
6378 | /* It is ok to modify type here even if itype is |
6379 | NULL: if size_varies, we're in a | |
96ff6c8c | 6380 | multi-dimensional array and the inner type has |
8d9f82d5 AO |
6381 | variable size, so the enclosing shared array type |
6382 | must too. */ | |
5c076987 JM |
6383 | if (size && TREE_CODE (size) == INTEGER_CST) |
6384 | type | |
6385 | = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
6386 | C_TYPE_VARIABLE_SIZE (type) = 1; | |
6387 | } | |
9df594d7 RG |
6388 | |
6389 | /* The GCC extension for zero-length arrays differs from | |
6390 | ISO flexible array members in that sizeof yields | |
6391 | zero. */ | |
6392 | if (size && integer_zerop (size)) | |
6393 | { | |
8d9f82d5 | 6394 | gcc_assert (itype); |
8c4353b7 | 6395 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); |
9df594d7 RG |
6396 | TYPE_SIZE (type) = bitsize_zero_node; |
6397 | TYPE_SIZE_UNIT (type) = size_zero_node; | |
e4a95933 | 6398 | SET_TYPE_STRUCTURAL_EQUALITY (type); |
9df594d7 | 6399 | } |
52ffd86e MS |
6400 | if (array_parm_vla_unspec_p) |
6401 | { | |
8d9f82d5 | 6402 | gcc_assert (itype); |
52ffd86e | 6403 | /* The type is complete. C99 6.7.5.2p4 */ |
8c4353b7 | 6404 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); |
52ffd86e MS |
6405 | TYPE_SIZE (type) = bitsize_zero_node; |
6406 | TYPE_SIZE_UNIT (type) = size_zero_node; | |
e4a95933 | 6407 | SET_TYPE_STRUCTURAL_EQUALITY (type); |
52ffd86e | 6408 | } |
e78bede6 MP |
6409 | |
6410 | if (!valid_array_size_p (loc, type, name)) | |
6411 | type = error_mark_node; | |
366de0ce | 6412 | } |
51e29401 | 6413 | |
366de0ce | 6414 | if (decl_context != PARM |
3b53cddc JM |
6415 | && (array_ptr_quals != TYPE_UNQUALIFIED |
6416 | || array_ptr_attrs != NULL_TREE | |
6417 | || array_parm_static)) | |
366de0ce | 6418 | { |
e78bede6 MP |
6419 | error_at (loc, "static or type qualifiers in non-parameter " |
6420 | "array declarator"); | |
3b53cddc JM |
6421 | array_ptr_quals = TYPE_UNQUALIFIED; |
6422 | array_ptr_attrs = NULL_TREE; | |
e3455240 | 6423 | array_parm_static = false; |
366de0ce | 6424 | } |
e9e32ee6 | 6425 | orig_qual_indirect++; |
366de0ce NS |
6426 | break; |
6427 | } | |
f8893e47 | 6428 | case cdk_function: |
366de0ce NS |
6429 | { |
6430 | /* Say it's a definition only for the declarator closest | |
6431 | to the identifier, apart possibly from some | |
6432 | attributes. */ | |
6433 | bool really_funcdef = false; | |
6434 | tree arg_types; | |
e9e32ee6 | 6435 | orig_qual_type = NULL_TREE; |
366de0ce NS |
6436 | if (funcdef_flag) |
6437 | { | |
f8893e47 JM |
6438 | const struct c_declarator *t = declarator->declarator; |
6439 | while (t->kind == cdk_attrs) | |
6440 | t = t->declarator; | |
6441 | really_funcdef = (t->kind == cdk_id); | |
366de0ce | 6442 | } |
51e29401 | 6443 | |
366de0ce NS |
6444 | /* Declaring a function type. Make sure we have a valid |
6445 | type for the function to return. */ | |
6446 | if (type == error_mark_node) | |
6447 | continue; | |
c22cacf3 | 6448 | |
f9551830 | 6449 | size_varies = false; |
51e29401 | 6450 | |
366de0ce NS |
6451 | /* Warn about some types functions can't return. */ |
6452 | if (TREE_CODE (type) == FUNCTION_TYPE) | |
6453 | { | |
88388a52 | 6454 | if (name) |
c2255bc4 AH |
6455 | error_at (loc, "%qE declared as function returning a " |
6456 | "function", name); | |
88388a52 | 6457 | else |
c2255bc4 AH |
6458 | error_at (loc, "type name declared as function " |
6459 | "returning a function"); | |
366de0ce NS |
6460 | type = integer_type_node; |
6461 | } | |
6462 | if (TREE_CODE (type) == ARRAY_TYPE) | |
6463 | { | |
88388a52 | 6464 | if (name) |
c2255bc4 AH |
6465 | error_at (loc, "%qE declared as function returning an array", |
6466 | name); | |
88388a52 | 6467 | else |
c2255bc4 AH |
6468 | error_at (loc, "type name declared as function returning " |
6469 | "an array"); | |
366de0ce NS |
6470 | type = integer_type_node; |
6471 | } | |
51e29401 | 6472 | |
366de0ce NS |
6473 | /* Construct the function type and go to the next |
6474 | inner layer of declarator. */ | |
f8893e47 | 6475 | arg_info = declarator->u.arg_info; |
366de0ce | 6476 | arg_types = grokparms (arg_info, really_funcdef); |
51e29401 | 6477 | |
366de0ce NS |
6478 | /* Type qualifiers before the return type of the function |
6479 | qualify the return type, not the function type. */ | |
6480 | if (type_quals) | |
6481 | { | |
8a14afd0 BS |
6482 | const enum c_declspec_word ignored_quals_list[] = |
6483 | { | |
6484 | cdw_const, cdw_volatile, cdw_restrict, cdw_address_space, | |
6485 | cdw_atomic, cdw_number_of_elements | |
6486 | }; | |
6487 | location_t specs_loc | |
6488 | = smallest_type_quals_location (declspecs->locations, | |
6489 | ignored_quals_list); | |
6490 | if (specs_loc == UNKNOWN_LOCATION) | |
6491 | specs_loc = declspecs->locations[cdw_typedef]; | |
6492 | if (specs_loc == UNKNOWN_LOCATION) | |
6493 | specs_loc = loc; | |
6494 | ||
c22cacf3 | 6495 | /* Type qualifiers on a function return type are |
366de0ce NS |
6496 | normally permitted by the standard but have no |
6497 | effect, so give a warning at -Wreturn-type. | |
6498 | Qualifiers on a void return type are banned on | |
6499 | function definitions in ISO C; GCC used to used | |
aa4b467b JM |
6500 | them for noreturn functions. The resolution of C11 |
6501 | DR#423 means qualifiers (other than _Atomic) are | |
6502 | actually removed from the return type when | |
6503 | determining the function type. */ | |
8a14afd0 | 6504 | int quals_used = type_quals; |
aa4b467b JM |
6505 | if (flag_isoc11) |
6506 | quals_used &= TYPE_QUAL_ATOMIC; | |
6507 | if (quals_used && VOID_TYPE_P (type) && really_funcdef) | |
8a14afd0 | 6508 | pedwarn (specs_loc, 0, |
509c9d60 | 6509 | "function definition has qualified void return type"); |
44c21c7f | 6510 | else |
8a14afd0 | 6511 | warning_at (specs_loc, OPT_Wignored_qualifiers, |
44c21c7f | 6512 | "type qualifiers ignored on function return type"); |
c22cacf3 | 6513 | |
aa4b467b JM |
6514 | /* Ensure an error for restrict on invalid types; the |
6515 | DR#423 resolution is not entirely clear about | |
6516 | this. */ | |
6517 | if (flag_isoc11 | |
6518 | && (type_quals & TYPE_QUAL_RESTRICT) | |
6519 | && (!POINTER_TYPE_P (type) | |
6520 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type)))) | |
6521 | error_at (loc, "invalid use of %<restrict%>"); | |
6522 | if (quals_used) | |
6523 | type = c_build_qualified_type (type, quals_used); | |
366de0ce NS |
6524 | } |
6525 | type_quals = TYPE_UNQUALIFIED; | |
c22cacf3 | 6526 | |
366de0ce | 6527 | type = build_function_type (type, arg_types); |
f8893e47 | 6528 | declarator = declarator->declarator; |
c22cacf3 | 6529 | |
366de0ce NS |
6530 | /* Set the TYPE_CONTEXTs for each tagged type which is local to |
6531 | the formal parameter list of this FUNCTION_TYPE to point to | |
6532 | the FUNCTION_TYPE node itself. */ | |
e0c9fbb7 | 6533 | { |
e60bf9d4 NF |
6534 | c_arg_tag *tag; |
6535 | unsigned ix; | |
c22cacf3 | 6536 | |
9771b263 | 6537 | FOR_EACH_VEC_SAFE_ELT_REVERSE (arg_info->tags, ix, tag) |
e60bf9d4 | 6538 | TYPE_CONTEXT (tag->type) = type; |
e0c9fbb7 | 6539 | } |
366de0ce NS |
6540 | break; |
6541 | } | |
f8893e47 | 6542 | case cdk_pointer: |
51e29401 | 6543 | { |
366de0ce NS |
6544 | /* Merge any constancy or volatility into the target type |
6545 | for the pointer. */ | |
267bac10 JM |
6546 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6547 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6548 | { | |
6549 | error_at (loc, | |
6550 | "%<_Atomic%>-qualified function type"); | |
6551 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6552 | } | |
6553 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6554 | && type_quals) | |
c1771a20 | 6555 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6556 | "ISO C forbids qualified function types"); |
366de0ce | 6557 | if (type_quals) |
e9e32ee6 JM |
6558 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6559 | orig_qual_indirect); | |
6560 | orig_qual_type = NULL_TREE; | |
f9551830 | 6561 | size_varies = false; |
3b53cddc | 6562 | |
706c4bb7 OH |
6563 | /* When the pointed-to type involves components of variable size, |
6564 | care must be taken to ensure that the size evaluation code is | |
6565 | emitted early enough to dominate all the possible later uses | |
6566 | and late enough for the variables on which it depends to have | |
6567 | been assigned. | |
6568 | ||
6569 | This is expected to happen automatically when the pointed-to | |
6570 | type has a name/declaration of it's own, but special attention | |
6571 | is required if the type is anonymous. | |
6572 | ||
d74641bd RS |
6573 | We attach an artificial TYPE_DECL to such pointed-to type |
6574 | and arrange for it to be included in a DECL_EXPR. This | |
6575 | forces the sizes evaluation at a safe point and ensures it | |
6576 | is not deferred until e.g. within a deeper conditional context. | |
6577 | ||
6578 | PARM contexts have no enclosing statement list that | |
6579 | can hold the DECL_EXPR, so we need to use a BIND_EXPR | |
6580 | instead, and add it to the list of expressions that | |
6581 | need to be evaluated. | |
6582 | ||
6583 | TYPENAME contexts do have an enclosing statement list, | |
6584 | but it would be incorrect to use it, as the size should | |
6585 | only be evaluated if the containing expression is | |
6586 | evaluated. We might also be in the middle of an | |
6587 | expression with side effects on the pointed-to type size | |
6588 | "arguments" prior to the pointer declaration point and | |
6589 | the fake TYPE_DECL in the enclosing context would force | |
6590 | the size evaluation prior to the side effects. We therefore | |
6591 | use BIND_EXPRs in TYPENAME contexts too. */ | |
706c4bb7 | 6592 | if (!TYPE_NAME (type) |
706c4bb7 OH |
6593 | && variably_modified_type_p (type, NULL_TREE)) |
6594 | { | |
d74641bd RS |
6595 | tree bind = NULL_TREE; |
6596 | if (decl_context == TYPENAME || decl_context == PARM) | |
6597 | { | |
6598 | bind = build3 (BIND_EXPR, void_type_node, NULL_TREE, | |
6599 | NULL_TREE, NULL_TREE); | |
6600 | TREE_SIDE_EFFECTS (bind) = 1; | |
6601 | BIND_EXPR_BODY (bind) = push_stmt_list (); | |
6602 | push_scope (); | |
6603 | } | |
c2255bc4 | 6604 | tree decl = build_decl (loc, TYPE_DECL, NULL_TREE, type); |
706c4bb7 OH |
6605 | DECL_ARTIFICIAL (decl) = 1; |
6606 | pushdecl (decl); | |
c2255bc4 | 6607 | finish_decl (decl, loc, NULL_TREE, NULL_TREE, NULL_TREE); |
706c4bb7 | 6608 | TYPE_NAME (type) = decl; |
d74641bd RS |
6609 | if (bind) |
6610 | { | |
6611 | pop_scope (); | |
6612 | BIND_EXPR_BODY (bind) | |
6613 | = pop_stmt_list (BIND_EXPR_BODY (bind)); | |
6614 | if (*expr) | |
6615 | *expr = build2 (COMPOUND_EXPR, void_type_node, *expr, | |
6616 | bind); | |
6617 | else | |
6618 | *expr = bind; | |
6619 | } | |
706c4bb7 OH |
6620 | } |
6621 | ||
412cd719 | 6622 | type = c_build_pointer_type (type); |
c22cacf3 | 6623 | |
deb176fa JM |
6624 | /* Process type qualifiers (such as const or volatile) |
6625 | that were given inside the `*'. */ | |
3b53cddc | 6626 | type_quals = declarator->u.pointer_quals; |
deb176fa | 6627 | |
f8893e47 | 6628 | declarator = declarator->declarator; |
366de0ce | 6629 | break; |
51e29401 | 6630 | } |
366de0ce NS |
6631 | default: |
6632 | gcc_unreachable (); | |
51e29401 | 6633 | } |
51e29401 | 6634 | } |
b9baeecd | 6635 | *decl_attrs = chainon (returned_attrs, *decl_attrs); |
51e29401 | 6636 | |
46df2823 JM |
6637 | /* Now TYPE has the actual type, apart from any qualifiers in |
6638 | TYPE_QUALS. */ | |
51e29401 | 6639 | |
36c5e70a BE |
6640 | /* Warn about address space used for things other than static memory or |
6641 | pointers. */ | |
6642 | address_space = DECODE_QUAL_ADDR_SPACE (type_quals); | |
6643 | if (!ADDR_SPACE_GENERIC_P (address_space)) | |
6644 | { | |
6645 | if (decl_context == NORMAL) | |
6646 | { | |
6647 | switch (storage_class) | |
6648 | { | |
6649 | case csc_auto: | |
6650 | error ("%qs combined with %<auto%> qualifier for %qE", | |
6651 | c_addr_space_name (address_space), name); | |
6652 | break; | |
6653 | case csc_register: | |
6654 | error ("%qs combined with %<register%> qualifier for %qE", | |
6655 | c_addr_space_name (address_space), name); | |
6656 | break; | |
6657 | case csc_none: | |
6658 | if (current_function_scope) | |
6659 | { | |
6660 | error ("%qs specified for auto variable %qE", | |
6661 | c_addr_space_name (address_space), name); | |
6662 | break; | |
6663 | } | |
6664 | break; | |
6665 | case csc_static: | |
6666 | case csc_extern: | |
6667 | case csc_typedef: | |
6668 | break; | |
6669 | default: | |
6670 | gcc_unreachable (); | |
6671 | } | |
6672 | } | |
6673 | else if (decl_context == PARM && TREE_CODE (type) != ARRAY_TYPE) | |
6674 | { | |
6675 | if (name) | |
6676 | error ("%qs specified for parameter %qE", | |
6677 | c_addr_space_name (address_space), name); | |
6678 | else | |
6679 | error ("%qs specified for unnamed parameter", | |
6680 | c_addr_space_name (address_space)); | |
6681 | } | |
6682 | else if (decl_context == FIELD) | |
6683 | { | |
6684 | if (name) | |
6685 | error ("%qs specified for structure field %qE", | |
6686 | c_addr_space_name (address_space), name); | |
6687 | else | |
6688 | error ("%qs specified for structure field", | |
6689 | c_addr_space_name (address_space)); | |
6690 | } | |
6691 | } | |
6692 | ||
d134f39e JM |
6693 | /* Check the type and width of a bit-field. */ |
6694 | if (bitfield) | |
267bac10 | 6695 | { |
420a9d9b | 6696 | check_bitfield_type_and_width (loc, &type, width, name); |
267bac10 JM |
6697 | /* C11 makes it implementation-defined (6.7.2.1#5) whether |
6698 | atomic types are permitted for bit-fields; we have no code to | |
6699 | make bit-field accesses atomic, so disallow them. */ | |
6700 | if (type_quals & TYPE_QUAL_ATOMIC) | |
6701 | { | |
6702 | if (name) | |
191a6b94 | 6703 | error_at (loc, "bit-field %qE has atomic type", name); |
267bac10 | 6704 | else |
191a6b94 | 6705 | error_at (loc, "bit-field has atomic type"); |
267bac10 JM |
6706 | type_quals &= ~TYPE_QUAL_ATOMIC; |
6707 | } | |
6708 | } | |
d134f39e | 6709 | |
d19fa6b5 JM |
6710 | /* Reject invalid uses of _Alignas. */ |
6711 | if (declspecs->alignas_p) | |
6712 | { | |
6713 | if (storage_class == csc_typedef) | |
6714 | error_at (loc, "alignment specified for typedef %qE", name); | |
6715 | else if (storage_class == csc_register) | |
6716 | error_at (loc, "alignment specified for %<register%> object %qE", | |
6717 | name); | |
6718 | else if (decl_context == PARM) | |
6719 | { | |
6720 | if (name) | |
6721 | error_at (loc, "alignment specified for parameter %qE", name); | |
6722 | else | |
6723 | error_at (loc, "alignment specified for unnamed parameter"); | |
6724 | } | |
6725 | else if (bitfield) | |
6726 | { | |
6727 | if (name) | |
6728 | error_at (loc, "alignment specified for bit-field %qE", name); | |
6729 | else | |
6730 | error_at (loc, "alignment specified for unnamed bit-field"); | |
6731 | } | |
6732 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6733 | error_at (loc, "alignment specified for function %qE", name); | |
92a5f2ba | 6734 | else if (declspecs->align_log != -1 && TYPE_P (type)) |
d19fa6b5 JM |
6735 | { |
6736 | alignas_align = 1U << declspecs->align_log; | |
2793eeab | 6737 | if (alignas_align < min_align_of_type (type)) |
d19fa6b5 JM |
6738 | { |
6739 | if (name) | |
6740 | error_at (loc, "%<_Alignas%> specifiers cannot reduce " | |
6741 | "alignment of %qE", name); | |
6742 | else | |
6743 | error_at (loc, "%<_Alignas%> specifiers cannot reduce " | |
6744 | "alignment of unnamed field"); | |
6745 | alignas_align = 0; | |
6746 | } | |
6747 | } | |
6748 | } | |
6749 | ||
51e29401 RS |
6750 | /* If this is declaring a typedef name, return a TYPE_DECL. */ |
6751 | ||
9a26d6ee | 6752 | if (storage_class == csc_typedef) |
51e29401 RS |
6753 | { |
6754 | tree decl; | |
267bac10 JM |
6755 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6756 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6757 | { | |
6758 | error_at (loc, | |
6759 | "%<_Atomic%>-qualified function type"); | |
6760 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6761 | } | |
6762 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6763 | && type_quals) | |
c1771a20 | 6764 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6765 | "ISO C forbids qualified function types"); |
3932261a | 6766 | if (type_quals) |
e9e32ee6 JM |
6767 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6768 | orig_qual_indirect); | |
c2255bc4 AH |
6769 | decl = build_decl (declarator->id_loc, |
6770 | TYPE_DECL, declarator->u.id, type); | |
98c3a782 | 6771 | if (declspecs->explicit_signed_p) |
51e29401 | 6772 | C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1; |
61f4f1cc | 6773 | if (declspecs->inline_p) |
c2255bc4 | 6774 | pedwarn (loc, 0,"typedef %q+D declared %<inline%>", decl); |
bbceee64 JM |
6775 | if (declspecs->noreturn_p) |
6776 | pedwarn (loc, 0,"typedef %q+D declared %<_Noreturn%>", decl); | |
7e5487a2 ILT |
6777 | |
6778 | if (warn_cxx_compat && declarator->u.id != NULL_TREE) | |
6779 | { | |
6780 | struct c_binding *b = I_TAG_BINDING (declarator->u.id); | |
6781 | ||
6782 | if (b != NULL | |
6783 | && b->decl != NULL_TREE | |
6784 | && (B_IN_CURRENT_SCOPE (b) | |
6785 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
6786 | && TYPE_MAIN_VARIANT (b->decl) != TYPE_MAIN_VARIANT (type)) | |
6787 | { | |
097f82ec | 6788 | auto_diagnostic_group d; |
bb85aa74 MP |
6789 | if (warning_at (declarator->id_loc, OPT_Wc___compat, |
6790 | ("using %qD as both a typedef and a tag is " | |
6791 | "invalid in C++"), decl) | |
6792 | && b->locus != UNKNOWN_LOCATION) | |
7e5487a2 ILT |
6793 | inform (b->locus, "originally defined here"); |
6794 | } | |
6795 | } | |
6796 | ||
51e29401 RS |
6797 | return decl; |
6798 | } | |
6799 | ||
51e29401 RS |
6800 | /* If this is a type name (such as, in a cast or sizeof), |
6801 | compute the type and return it now. */ | |
6802 | ||
6803 | if (decl_context == TYPENAME) | |
6804 | { | |
61f4f1cc JM |
6805 | /* Note that the grammar rejects storage classes in typenames |
6806 | and fields. */ | |
6807 | gcc_assert (storage_class == csc_none && !threadp | |
bbceee64 | 6808 | && !declspecs->inline_p && !declspecs->noreturn_p); |
267bac10 JM |
6809 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6810 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6811 | { | |
6812 | error_at (loc, | |
6813 | "%<_Atomic%>-qualified function type"); | |
6814 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6815 | } | |
6816 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6817 | && type_quals) | |
c1771a20 | 6818 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6819 | "ISO C forbids const or volatile function types"); |
3932261a | 6820 | if (type_quals) |
e9e32ee6 JM |
6821 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6822 | orig_qual_indirect); | |
51e29401 RS |
6823 | return type; |
6824 | } | |
6825 | ||
52ffd86e MS |
6826 | if (pedantic && decl_context == FIELD |
6827 | && variably_modified_type_p (type, NULL_TREE)) | |
6828 | { | |
6829 | /* C99 6.7.2.1p8 */ | |
c1771a20 | 6830 | pedwarn (loc, OPT_Wpedantic, "a member of a structure or union cannot " |
c2255bc4 | 6831 | "have a variably modified type"); |
52ffd86e MS |
6832 | } |
6833 | ||
61df2ee2 RS |
6834 | /* Aside from typedefs and type names (handle above), |
6835 | `void' at top level (not within pointer) | |
6836 | is allowed only in public variables. | |
51e29401 RS |
6837 | We don't complain about parms either, but that is because |
6838 | a better error message can be made later. */ | |
6839 | ||
71653180 | 6840 | if (VOID_TYPE_P (type) && decl_context != PARM |
3f75a254 | 6841 | && !((decl_context != FIELD && TREE_CODE (type) != FUNCTION_TYPE) |
9a26d6ee | 6842 | && (storage_class == csc_extern |
f75fbaf7 | 6843 | || (current_scope == file_scope |
9a26d6ee JM |
6844 | && !(storage_class == csc_static |
6845 | || storage_class == csc_register))))) | |
51e29401 | 6846 | { |
c2255bc4 | 6847 | error_at (loc, "variable or field %qE declared void", name); |
51e29401 RS |
6848 | type = integer_type_node; |
6849 | } | |
6850 | ||
6851 | /* Now create the decl, which may be a VAR_DECL, a PARM_DECL | |
6852 | or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */ | |
6853 | ||
6854 | { | |
91d231cb | 6855 | tree decl; |
51e29401 RS |
6856 | |
6857 | if (decl_context == PARM) | |
6858 | { | |
c530479e | 6859 | tree promoted_type; |
773ec47f | 6860 | bool array_parameter_p = false; |
51e29401 RS |
6861 | |
6862 | /* A parameter declared as an array of T is really a pointer to T. | |
6863 | One declared as a function is really a pointer to a function. */ | |
6864 | ||
6865 | if (TREE_CODE (type) == ARRAY_TYPE) | |
6866 | { | |
6867 | /* Transfer const-ness of array into that of type pointed to. */ | |
eaf2e788 | 6868 | type = TREE_TYPE (type); |
66189108 MP |
6869 | if (orig_qual_type != NULL_TREE) |
6870 | { | |
6871 | if (orig_qual_indirect == 0) | |
6872 | orig_qual_type = TREE_TYPE (orig_qual_type); | |
6873 | else | |
6874 | orig_qual_indirect--; | |
6875 | } | |
3932261a | 6876 | if (type_quals) |
e9e32ee6 JM |
6877 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6878 | orig_qual_indirect); | |
412cd719 | 6879 | type = c_build_pointer_type (type); |
3b53cddc | 6880 | type_quals = array_ptr_quals; |
b09869ff JM |
6881 | if (type_quals) |
6882 | type = c_build_qualified_type (type, type_quals); | |
0e03329a | 6883 | |
3b53cddc JM |
6884 | /* We don't yet implement attributes in this context. */ |
6885 | if (array_ptr_attrs != NULL_TREE) | |
c2255bc4 AH |
6886 | warning_at (loc, OPT_Wattributes, |
6887 | "attributes in parameter array declarator ignored"); | |
0e03329a | 6888 | |
f9551830 | 6889 | size_varies = false; |
773ec47f | 6890 | array_parameter_p = true; |
51e29401 RS |
6891 | } |
6892 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6893 | { | |
267bac10 JM |
6894 | if (type_quals & TYPE_QUAL_ATOMIC) |
6895 | { | |
6896 | error_at (loc, | |
6897 | "%<_Atomic%>-qualified function type"); | |
6898 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6899 | } | |
6900 | else if (type_quals) | |
c1771a20 | 6901 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6902 | "ISO C forbids qualified function types"); |
3932261a MM |
6903 | if (type_quals) |
6904 | type = c_build_qualified_type (type, type_quals); | |
412cd719 | 6905 | type = c_build_pointer_type (type); |
3932261a | 6906 | type_quals = TYPE_UNQUALIFIED; |
51e29401 | 6907 | } |
0f38b811 MM |
6908 | else if (type_quals) |
6909 | type = c_build_qualified_type (type, type_quals); | |
35b1a6fa | 6910 | |
c2255bc4 AH |
6911 | decl = build_decl (declarator->id_loc, |
6912 | PARM_DECL, declarator->u.id, type); | |
929f3671 | 6913 | if (size_varies) |
51e29401 | 6914 | C_DECL_VARIABLE_SIZE (decl) = 1; |
773ec47f | 6915 | C_ARRAY_PARAMETER (decl) = array_parameter_p; |
51e29401 RS |
6916 | |
6917 | /* Compute the type actually passed in the parmlist, | |
6918 | for the case where there is no prototype. | |
6919 | (For example, shorts and chars are passed as ints.) | |
6920 | When there is a prototype, this is overridden later. */ | |
6921 | ||
c530479e RH |
6922 | if (type == error_mark_node) |
6923 | promoted_type = type; | |
6924 | else | |
ab393bf1 | 6925 | promoted_type = c_type_promotes_to (type); |
51e29401 | 6926 | |
c530479e | 6927 | DECL_ARG_TYPE (decl) = promoted_type; |
61f4f1cc | 6928 | if (declspecs->inline_p) |
c2255bc4 | 6929 | pedwarn (loc, 0, "parameter %q+D declared %<inline%>", decl); |
bbceee64 JM |
6930 | if (declspecs->noreturn_p) |
6931 | pedwarn (loc, 0, "parameter %q+D declared %<_Noreturn%>", decl); | |
51e29401 RS |
6932 | } |
6933 | else if (decl_context == FIELD) | |
6934 | { | |
61f4f1cc JM |
6935 | /* Note that the grammar rejects storage classes in typenames |
6936 | and fields. */ | |
6937 | gcc_assert (storage_class == csc_none && !threadp | |
bbceee64 | 6938 | && !declspecs->inline_p && !declspecs->noreturn_p); |
61f4f1cc | 6939 | |
51e29401 | 6940 | /* Structure field. It may not be a function. */ |
dfd48d76 | 6941 | |
51e29401 RS |
6942 | if (TREE_CODE (type) == FUNCTION_TYPE) |
6943 | { | |
c2255bc4 | 6944 | error_at (loc, "field %qE declared as a function", name); |
51e29401 RS |
6945 | type = build_pointer_type (type); |
6946 | } | |
d0f062fb | 6947 | else if (TREE_CODE (type) != ERROR_MARK |
c22cacf3 | 6948 | && !COMPLETE_OR_UNBOUND_ARRAY_TYPE_P (type)) |
51e29401 | 6949 | { |
1202aec1 | 6950 | if (name) |
c2255bc4 | 6951 | error_at (loc, "field %qE has incomplete type", name); |
1202aec1 | 6952 | else |
c2255bc4 | 6953 | error_at (loc, "unnamed field has incomplete type"); |
51e29401 RS |
6954 | type = error_mark_node; |
6955 | } | |
065d214c MP |
6956 | else if (TREE_CODE (type) == ARRAY_TYPE |
6957 | && TYPE_DOMAIN (type) == NULL_TREE) | |
6958 | { | |
6959 | /* We have a flexible array member through a typedef. | |
6960 | Set suitable range. Whether this is a correct position | |
6961 | for a flexible array member will be determined elsewhere. */ | |
6962 | if (!in_system_header_at (input_location)) | |
6963 | pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not " | |
6964 | "support flexible array members"); | |
6965 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
6966 | TYPE_DOMAIN (type) = build_range_type (sizetype, size_zero_node, | |
6967 | NULL_TREE); | |
b95a64bb JJ |
6968 | if (orig_qual_indirect == 0) |
6969 | orig_qual_type = NULL_TREE; | |
065d214c | 6970 | } |
e9e32ee6 JM |
6971 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6972 | orig_qual_indirect); | |
c2255bc4 AH |
6973 | decl = build_decl (declarator->id_loc, |
6974 | FIELD_DECL, declarator->u.id, type); | |
2bf105ab | 6975 | DECL_NONADDRESSABLE_P (decl) = bitfield; |
ab53bae2 | 6976 | if (bitfield && !declarator->u.id) |
974aedcc MP |
6977 | { |
6978 | TREE_NO_WARNING (decl) = 1; | |
6979 | DECL_PADDING_P (decl) = 1; | |
6980 | } | |
2bf105ab | 6981 | |
929f3671 | 6982 | if (size_varies) |
51e29401 RS |
6983 | C_DECL_VARIABLE_SIZE (decl) = 1; |
6984 | } | |
6985 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6986 | { | |
9a26d6ee | 6987 | if (storage_class == csc_register || threadp) |
1ac0ac8b | 6988 | { |
c2255bc4 | 6989 | error_at (loc, "invalid storage class for function %qE", name); |
636b4106 | 6990 | } |
ff164b22 GK |
6991 | else if (current_scope != file_scope) |
6992 | { | |
6993 | /* Function declaration not at file scope. Storage | |
6994 | classes other than `extern' are not allowed, C99 | |
6995 | 6.7.1p5, and `extern' makes no difference. However, | |
6996 | GCC allows 'auto', perhaps with 'inline', to support | |
6997 | nested functions. */ | |
9a26d6ee | 6998 | if (storage_class == csc_auto) |
c1771a20 | 6999 | pedwarn (loc, OPT_Wpedantic, |
88388a52 | 7000 | "invalid storage class for function %qE", name); |
6f17bbcf | 7001 | else if (storage_class == csc_static) |
1ac0ac8b | 7002 | { |
c2255bc4 | 7003 | error_at (loc, "invalid storage class for function %qE", name); |
c22cacf3 | 7004 | if (funcdef_flag) |
6f17bbcf JM |
7005 | storage_class = declspecs->storage_class = csc_none; |
7006 | else | |
6574d78e | 7007 | return NULL_TREE; |
1ac0ac8b | 7008 | } |
ff164b22 | 7009 | } |
fd0b8fce | 7010 | |
c2255bc4 AH |
7011 | decl = build_decl (declarator->id_loc, |
7012 | FUNCTION_DECL, declarator->u.id, type); | |
6f17bbcf JM |
7013 | decl = build_decl_attribute_variant (decl, decl_attr); |
7014 | ||
267bac10 JM |
7015 | if (type_quals & TYPE_QUAL_ATOMIC) |
7016 | { | |
7017 | error_at (loc, | |
7018 | "%<_Atomic%>-qualified function type"); | |
7019 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
7020 | } | |
7021 | else if (pedantic && type_quals && !DECL_IN_SYSTEM_HEADER (decl)) | |
c1771a20 | 7022 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 7023 | "ISO C forbids qualified function types"); |
51e29401 | 7024 | |
9affb2c7 ZW |
7025 | /* Every function declaration is an external reference |
7026 | (DECL_EXTERNAL) except for those which are not at file | |
7027 | scope and are explicitly declared "auto". This is | |
7028 | forbidden by standard C (C99 6.7.1p5) and is interpreted by | |
7029 | GCC to signify a forward declaration of a nested function. */ | |
9a26d6ee | 7030 | if (storage_class == csc_auto && current_scope != file_scope) |
9affb2c7 | 7031 | DECL_EXTERNAL (decl) = 0; |
71113fcd GK |
7032 | /* In C99, a function which is declared 'inline' with 'extern' |
7033 | is not an external reference (which is confusing). It | |
7034 | means that the later definition of the function must be output | |
7035 | in this file, C99 6.7.4p6. In GNU C89, a function declared | |
7036 | 'extern inline' is an external reference. */ | |
7037 | else if (declspecs->inline_p && storage_class != csc_static) | |
da1c7394 ILT |
7038 | DECL_EXTERNAL (decl) = ((storage_class == csc_extern) |
7039 | == flag_gnu89_inline); | |
9affb2c7 | 7040 | else |
71113fcd | 7041 | DECL_EXTERNAL (decl) = !initialized; |
caf93cb0 | 7042 | |
51e29401 RS |
7043 | /* Record absence of global scope for `static' or `auto'. */ |
7044 | TREE_PUBLIC (decl) | |
9a26d6ee | 7045 | = !(storage_class == csc_static || storage_class == csc_auto); |
c40f7b33 | 7046 | |
77dbdb57 | 7047 | /* For a function definition, record the argument information |
7b112487 | 7048 | block where store_parm_decls will look for it. */ |
77dbdb57 | 7049 | if (funcdef_flag) |
7b112487 | 7050 | current_function_arg_info = arg_info; |
77dbdb57 | 7051 | |
98c3a782 | 7052 | if (declspecs->default_int_p) |
5ce89b2e JM |
7053 | C_FUNCTION_IMPLICIT_INT (decl) = 1; |
7054 | ||
bbceee64 JM |
7055 | /* Record presence of `inline' and `_Noreturn', if it is |
7056 | reasonable. */ | |
61f4f1cc | 7057 | if (flag_hosted && MAIN_NAME_P (declarator->u.id)) |
51e29401 | 7058 | { |
9a26d6ee | 7059 | if (declspecs->inline_p) |
c2255bc4 | 7060 | pedwarn (loc, 0, "cannot inline function %<main%>"); |
bbceee64 JM |
7061 | if (declspecs->noreturn_p) |
7062 | pedwarn (loc, 0, "%<main%> declared %<_Noreturn%>"); | |
7063 | } | |
7064 | else | |
7065 | { | |
7066 | if (declspecs->inline_p) | |
7067 | /* Record that the function is declared `inline'. */ | |
7068 | DECL_DECLARED_INLINE_P (decl) = 1; | |
7069 | if (declspecs->noreturn_p) | |
c4b3a0a0 | 7070 | { |
35aff4fb MP |
7071 | if (flag_isoc99) |
7072 | pedwarn_c99 (loc, OPT_Wpedantic, | |
c4b3a0a0 | 7073 | "ISO C99 does not support %<_Noreturn%>"); |
35aff4fb MP |
7074 | else |
7075 | pedwarn_c99 (loc, OPT_Wpedantic, | |
c4b3a0a0 | 7076 | "ISO C90 does not support %<_Noreturn%>"); |
c4b3a0a0 JM |
7077 | TREE_THIS_VOLATILE (decl) = 1; |
7078 | } | |
31ed8fea | 7079 | } |
51e29401 RS |
7080 | } |
7081 | else | |
7082 | { | |
7083 | /* It's a variable. */ | |
fd0b8fce | 7084 | /* An uninitialized decl with `extern' is a reference. */ |
9a26d6ee | 7085 | int extern_ref = !initialized && storage_class == csc_extern; |
51e29401 | 7086 | |
e9e32ee6 JM |
7087 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
7088 | orig_qual_indirect); | |
f4e92987 | 7089 | |
f75fbaf7 ZW |
7090 | /* C99 6.2.2p7: It is invalid (compile-time undefined |
7091 | behavior) to create an 'extern' declaration for a | |
f4e92987 | 7092 | variable if there is a global declaration that is |
f75fbaf7 ZW |
7093 | 'static' and the global declaration is not visible. |
7094 | (If the static declaration _is_ currently visible, | |
7095 | the 'extern' declaration is taken to refer to that decl.) */ | |
7096 | if (extern_ref && current_scope != file_scope) | |
f4e92987 | 7097 | { |
f8893e47 JM |
7098 | tree global_decl = identifier_global_value (declarator->u.id); |
7099 | tree visible_decl = lookup_name (declarator->u.id); | |
f4e92987 | 7100 | |
35b1a6fa | 7101 | if (global_decl |
f75fbaf7 | 7102 | && global_decl != visible_decl |
0ae9bd27 | 7103 | && VAR_P (global_decl) |
f4e92987 | 7104 | && !TREE_PUBLIC (global_decl)) |
c2255bc4 AH |
7105 | error_at (loc, "variable previously declared %<static%> " |
7106 | "redeclared %<extern%>"); | |
f4e92987 MM |
7107 | } |
7108 | ||
c2255bc4 AH |
7109 | decl = build_decl (declarator->id_loc, |
7110 | VAR_DECL, declarator->u.id, type); | |
929f3671 | 7111 | if (size_varies) |
51e29401 RS |
7112 | C_DECL_VARIABLE_SIZE (decl) = 1; |
7113 | ||
9a26d6ee | 7114 | if (declspecs->inline_p) |
c2255bc4 | 7115 | pedwarn (loc, 0, "variable %q+D declared %<inline%>", decl); |
bbceee64 JM |
7116 | if (declspecs->noreturn_p) |
7117 | pedwarn (loc, 0, "variable %q+D declared %<_Noreturn%>", decl); | |
51e29401 | 7118 | |
bbbcb2e1 JM |
7119 | /* At file scope, an initialized extern declaration may follow |
7120 | a static declaration. In that case, DECL_EXTERNAL will be | |
7121 | reset later in start_decl. */ | |
9a26d6ee | 7122 | DECL_EXTERNAL (decl) = (storage_class == csc_extern); |
3d78f2e9 | 7123 | |
f8521984 | 7124 | /* At file scope, the presence of a `static' or `register' storage |
ee534ebf RS |
7125 | class specifier, or the absence of all storage class specifiers |
7126 | makes this declaration a definition (perhaps tentative). Also, | |
fcc207bf | 7127 | the absence of `static' makes it public. */ |
f75fbaf7 | 7128 | if (current_scope == file_scope) |
51e29401 | 7129 | { |
fcc207bf | 7130 | TREE_PUBLIC (decl) = storage_class != csc_static; |
3d78f2e9 | 7131 | TREE_STATIC (decl) = !extern_ref; |
51e29401 | 7132 | } |
f8521984 | 7133 | /* Not at file scope, only `static' makes a static definition. */ |
51e29401 RS |
7134 | else |
7135 | { | |
9a26d6ee | 7136 | TREE_STATIC (decl) = (storage_class == csc_static); |
3d78f2e9 RH |
7137 | TREE_PUBLIC (decl) = extern_ref; |
7138 | } | |
7139 | ||
9a26d6ee | 7140 | if (threadp) |
56363ffd | 7141 | set_decl_tls_model (decl, decl_default_tls_model (decl)); |
51e29401 RS |
7142 | } |
7143 | ||
92f6fd0b JM |
7144 | if ((storage_class == csc_extern |
7145 | || (storage_class == csc_none | |
7146 | && TREE_CODE (type) == FUNCTION_TYPE | |
7147 | && !funcdef_flag)) | |
52ffd86e MS |
7148 | && variably_modified_type_p (type, NULL_TREE)) |
7149 | { | |
7150 | /* C99 6.7.5.2p2 */ | |
92f6fd0b | 7151 | if (TREE_CODE (type) == FUNCTION_TYPE) |
c2255bc4 | 7152 | error_at (loc, "non-nested function with variably modified type"); |
92f6fd0b | 7153 | else |
c2255bc4 AH |
7154 | error_at (loc, "object with variably modified type must have " |
7155 | "no linkage"); | |
52ffd86e MS |
7156 | } |
7157 | ||
51e29401 RS |
7158 | /* Record `register' declaration for warnings on & |
7159 | and in case doing stupid register allocation. */ | |
7160 | ||
9a26d6ee | 7161 | if (storage_class == csc_register) |
5baeaac0 JM |
7162 | { |
7163 | C_DECL_REGISTER (decl) = 1; | |
7164 | DECL_REGISTER (decl) = 1; | |
7165 | } | |
51e29401 RS |
7166 | |
7167 | /* Record constancy and volatility. */ | |
3932261a | 7168 | c_apply_type_quals_to_decl (type_quals, decl); |
51e29401 | 7169 | |
d19fa6b5 JM |
7170 | /* Apply _Alignas specifiers. */ |
7171 | if (alignas_align) | |
7172 | { | |
fe37c7af | 7173 | SET_DECL_ALIGN (decl, alignas_align * BITS_PER_UNIT); |
d19fa6b5 JM |
7174 | DECL_USER_ALIGN (decl) = 1; |
7175 | } | |
7176 | ||
51e29401 RS |
7177 | /* If a type has volatile components, it should be stored in memory. |
7178 | Otherwise, the fact that those components are volatile | |
820cc88f DB |
7179 | will be ignored, and would even crash the compiler. |
7180 | Of course, this only makes sense on VAR,PARM, and RESULT decl's. */ | |
7181 | if (C_TYPE_FIELDS_VOLATILE (TREE_TYPE (decl)) | |
0ae9bd27 | 7182 | && (VAR_P (decl) || TREE_CODE (decl) == PARM_DECL |
820cc88f | 7183 | || TREE_CODE (decl) == RESULT_DECL)) |
5baeaac0 JM |
7184 | { |
7185 | /* It is not an error for a structure with volatile fields to | |
7186 | be declared register, but reset DECL_REGISTER since it | |
7187 | cannot actually go in a register. */ | |
7188 | int was_reg = C_DECL_REGISTER (decl); | |
7189 | C_DECL_REGISTER (decl) = 0; | |
7190 | DECL_REGISTER (decl) = 0; | |
7191 | c_mark_addressable (decl); | |
7192 | C_DECL_REGISTER (decl) = was_reg; | |
7193 | } | |
51e29401 | 7194 | |
d05cc98e GK |
7195 | /* This is the earliest point at which we might know the assembler |
7196 | name of a variable. Thus, if it's known before this, die horribly. */ | |
a92f6726 NS |
7197 | gcc_assert (!HAS_DECL_ASSEMBLER_NAME_P (decl) |
7198 | || !DECL_ASSEMBLER_NAME_SET_P (decl)); | |
d05cc98e | 7199 | |
88eeff6f | 7200 | if (warn_cxx_compat |
0ae9bd27 | 7201 | && VAR_P (decl) |
88eeff6f ILT |
7202 | && TREE_PUBLIC (decl) |
7203 | && TREE_STATIC (decl) | |
3e636daf | 7204 | && (RECORD_OR_UNION_TYPE_P (TREE_TYPE (decl)) |
88eeff6f ILT |
7205 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) |
7206 | && TYPE_NAME (TREE_TYPE (decl)) == NULL_TREE) | |
7207 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
7208 | ("non-local variable %qD with anonymous type is " | |
7209 | "questionable in C++"), | |
7210 | decl); | |
7211 | ||
51e29401 RS |
7212 | return decl; |
7213 | } | |
7214 | } | |
7215 | \f | |
51e29401 | 7216 | /* Decode the parameter-list info for a function type or function definition. |
52ffd86e | 7217 | The argument is the value returned by `get_parm_info' (or made in c-parse.c |
51e29401 RS |
7218 | if there is an identifier list instead of a parameter decl list). |
7219 | These two functions are separate because when a function returns | |
7220 | or receives functions then each is called multiple times but the order | |
7221 | of calls is different. The last call to `grokparms' is always the one | |
7222 | that contains the formal parameter names of a function definition. | |
7223 | ||
51e29401 RS |
7224 | Return a list of arg types to use in the FUNCTION_TYPE for this function. |
7225 | ||
60919bce | 7226 | FUNCDEF_FLAG is true for a function definition, false for |
51e29401 | 7227 | a mere declaration. A nonempty identifier-list gets an error message |
60919bce | 7228 | when FUNCDEF_FLAG is false. */ |
51e29401 RS |
7229 | |
7230 | static tree | |
f8893e47 | 7231 | grokparms (struct c_arg_info *arg_info, bool funcdef_flag) |
51e29401 | 7232 | { |
f8893e47 | 7233 | tree arg_types = arg_info->types; |
51e29401 | 7234 | |
52ffd86e MS |
7235 | if (funcdef_flag && arg_info->had_vla_unspec) |
7236 | { | |
7237 | /* A function definition isn't function prototype scope C99 6.2.1p4. */ | |
7238 | /* C99 6.7.5.2p4 */ | |
7239 | error ("%<[*]%> not allowed in other than function prototype scope"); | |
7240 | } | |
7241 | ||
3fa8871b | 7242 | if (arg_types == NULL_TREE && !funcdef_flag |
8400e75e | 7243 | && !in_system_header_at (input_location)) |
3176a0c2 DD |
7244 | warning (OPT_Wstrict_prototypes, |
7245 | "function declaration isn%'t a prototype"); | |
51e29401 | 7246 | |
f75fbaf7 | 7247 | if (arg_types == error_mark_node) |
6574d78e MP |
7248 | /* Don't set TYPE_ARG_TYPES in this case. */ |
7249 | return NULL_TREE; | |
f75fbaf7 ZW |
7250 | |
7251 | else if (arg_types && TREE_CODE (TREE_VALUE (arg_types)) == IDENTIFIER_NODE) | |
51e29401 | 7252 | { |
3f75a254 | 7253 | if (!funcdef_flag) |
aa3ef09b | 7254 | { |
6574d78e MP |
7255 | pedwarn (input_location, 0, "parameter names (without types) in " |
7256 | "function declaration"); | |
aa3ef09b NF |
7257 | arg_info->parms = NULL_TREE; |
7258 | } | |
7259 | else | |
7260 | arg_info->parms = arg_info->types; | |
51e29401 | 7261 | |
3fa8871b | 7262 | arg_info->types = NULL_TREE; |
6574d78e | 7263 | return NULL_TREE; |
51e29401 RS |
7264 | } |
7265 | else | |
7266 | { | |
77dbdb57 ZW |
7267 | tree parm, type, typelt; |
7268 | unsigned int parmno; | |
7269 | ||
bba5733f JM |
7270 | /* If there is a parameter of incomplete type in a definition, |
7271 | this is an error. In a declaration this is valid, and a | |
7272 | struct or union type may be completed later, before any calls | |
7273 | or definition of the function. In the case where the tag was | |
7274 | first declared within the parameter list, a warning has | |
7275 | already been given. If a parameter has void type, then | |
7276 | however the function cannot be defined or called, so | |
7277 | warn. */ | |
77dbdb57 | 7278 | |
f8893e47 | 7279 | for (parm = arg_info->parms, typelt = arg_types, parmno = 1; |
eb1dfbb2 | 7280 | parm; |
910ad8de | 7281 | parm = DECL_CHAIN (parm), typelt = TREE_CHAIN (typelt), parmno++) |
77dbdb57 ZW |
7282 | { |
7283 | type = TREE_VALUE (typelt); | |
7284 | if (type == error_mark_node) | |
7285 | continue; | |
7286 | ||
7287 | if (!COMPLETE_TYPE_P (type)) | |
7288 | { | |
7289 | if (funcdef_flag) | |
7290 | { | |
7291 | if (DECL_NAME (parm)) | |
c5d75364 MLI |
7292 | error_at (input_location, |
7293 | "parameter %u (%q+D) has incomplete type", | |
7294 | parmno, parm); | |
77dbdb57 | 7295 | else |
c5d75364 MLI |
7296 | error_at (DECL_SOURCE_LOCATION (parm), |
7297 | "parameter %u has incomplete type", | |
7298 | parmno); | |
51e29401 | 7299 | |
77dbdb57 ZW |
7300 | TREE_VALUE (typelt) = error_mark_node; |
7301 | TREE_TYPE (parm) = error_mark_node; | |
e49a760f | 7302 | arg_types = NULL_TREE; |
77dbdb57 | 7303 | } |
bba5733f | 7304 | else if (VOID_TYPE_P (type)) |
77dbdb57 ZW |
7305 | { |
7306 | if (DECL_NAME (parm)) | |
c5d75364 MLI |
7307 | warning_at (input_location, 0, |
7308 | "parameter %u (%q+D) has void type", | |
7309 | parmno, parm); | |
77dbdb57 | 7310 | else |
c5d75364 MLI |
7311 | warning_at (DECL_SOURCE_LOCATION (parm), 0, |
7312 | "parameter %u has void type", | |
7313 | parmno); | |
77dbdb57 ZW |
7314 | } |
7315 | } | |
7c47d6e9 JM |
7316 | |
7317 | if (DECL_NAME (parm) && TREE_USED (parm)) | |
7318 | warn_if_shadowing (parm); | |
77dbdb57 ZW |
7319 | } |
7320 | return arg_types; | |
51e29401 RS |
7321 | } |
7322 | } | |
7323 | ||
b3399d18 NF |
7324 | /* Allocate and initialize a c_arg_info structure from the parser's |
7325 | obstack. */ | |
7326 | ||
7327 | struct c_arg_info * | |
7328 | build_arg_info (void) | |
7329 | { | |
7330 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
7331 | ret->parms = NULL_TREE; | |
7332 | ret->tags = NULL; | |
7333 | ret->types = NULL_TREE; | |
7334 | ret->others = NULL_TREE; | |
7335 | ret->pending_sizes = NULL; | |
7336 | ret->had_vla_unspec = 0; | |
7337 | return ret; | |
7338 | } | |
7339 | ||
f8893e47 JM |
7340 | /* Take apart the current scope and return a c_arg_info structure with |
7341 | info on a parameter list just parsed. | |
77dbdb57 | 7342 | |
f8893e47 | 7343 | This structure is later fed to 'grokparms' and 'store_parm_decls'. |
51e29401 | 7344 | |
f75fbaf7 | 7345 | ELLIPSIS being true means the argument list ended in '...' so don't |
a04a722b JM |
7346 | append a sentinel (void_list_node) to the end of the type-list. |
7347 | ||
7348 | EXPR is NULL or an expression that needs to be evaluated for the | |
7349 | side effects of array size expressions in the parameters. */ | |
51e29401 | 7350 | |
f8893e47 | 7351 | struct c_arg_info * |
a04a722b | 7352 | get_parm_info (bool ellipsis, tree expr) |
51e29401 | 7353 | { |
f75fbaf7 | 7354 | struct c_binding *b = current_scope->bindings; |
b3399d18 NF |
7355 | struct c_arg_info *arg_info = build_arg_info (); |
7356 | ||
3fa8871b | 7357 | tree parms = NULL_TREE; |
9771b263 | 7358 | vec<c_arg_tag, va_gc> *tags = NULL; |
3fa8871b MP |
7359 | tree types = NULL_TREE; |
7360 | tree others = NULL_TREE; | |
f75fbaf7 | 7361 | |
55d54003 ZW |
7362 | bool gave_void_only_once_err = false; |
7363 | ||
52ffd86e | 7364 | arg_info->had_vla_unspec = current_scope->had_vla_unspec; |
f8893e47 | 7365 | |
f75fbaf7 ZW |
7366 | /* The bindings in this scope must not get put into a block. |
7367 | We will take care of deleting the binding nodes. */ | |
7368 | current_scope->bindings = 0; | |
51e29401 | 7369 | |
f75fbaf7 ZW |
7370 | /* This function is only called if there was *something* on the |
7371 | parameter list. */ | |
366de0ce | 7372 | gcc_assert (b); |
55d54003 | 7373 | |
f75fbaf7 ZW |
7374 | /* A parameter list consisting solely of 'void' indicates that the |
7375 | function takes no arguments. But if the 'void' is qualified | |
7376 | (by 'const' or 'volatile'), or has a storage class specifier | |
7377 | ('register'), then the behavior is undefined; issue an error. | |
7378 | Typedefs for 'void' are OK (see DR#157). */ | |
c22cacf3 | 7379 | if (b->prev == 0 /* one binding */ |
f75fbaf7 ZW |
7380 | && TREE_CODE (b->decl) == PARM_DECL /* which is a parameter */ |
7381 | && !DECL_NAME (b->decl) /* anonymous */ | |
7382 | && VOID_TYPE_P (TREE_TYPE (b->decl))) /* of void type */ | |
7383 | { | |
267bac10 | 7384 | if (TYPE_QUALS (TREE_TYPE (b->decl)) != TYPE_UNQUALIFIED |
5baeaac0 | 7385 | || C_DECL_REGISTER (b->decl)) |
657e4e47 | 7386 | error_at (b->locus, "%<void%> as only parameter may not be qualified"); |
55d54003 | 7387 | |
f75fbaf7 ZW |
7388 | /* There cannot be an ellipsis. */ |
7389 | if (ellipsis) | |
657e4e47 | 7390 | error_at (b->locus, "%<void%> must be the only parameter"); |
51e29401 | 7391 | |
f8893e47 | 7392 | arg_info->types = void_list_node; |
f75fbaf7 | 7393 | return arg_info; |
51e29401 RS |
7394 | } |
7395 | ||
f75fbaf7 ZW |
7396 | if (!ellipsis) |
7397 | types = void_list_node; | |
51e29401 | 7398 | |
f75fbaf7 ZW |
7399 | /* Break up the bindings list into parms, tags, types, and others; |
7400 | apply sanity checks; purge the name-to-decl bindings. */ | |
7401 | while (b) | |
51e29401 | 7402 | { |
f75fbaf7 ZW |
7403 | tree decl = b->decl; |
7404 | tree type = TREE_TYPE (decl); | |
f32682ca | 7405 | c_arg_tag tag; |
55d54003 | 7406 | const char *keyword; |
55d54003 | 7407 | |
f75fbaf7 | 7408 | switch (TREE_CODE (decl)) |
6645c3fa | 7409 | { |
f75fbaf7 ZW |
7410 | case PARM_DECL: |
7411 | if (b->id) | |
7412 | { | |
366de0ce | 7413 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 ZW |
7414 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
7415 | } | |
55d54003 | 7416 | |
f75fbaf7 ZW |
7417 | /* Check for forward decls that never got their actual decl. */ |
7418 | if (TREE_ASM_WRITTEN (decl)) | |
657e4e47 JJ |
7419 | error_at (b->locus, |
7420 | "parameter %q+D has just a forward declaration", decl); | |
f75fbaf7 ZW |
7421 | /* Check for (..., void, ...) and issue an error. */ |
7422 | else if (VOID_TYPE_P (type) && !DECL_NAME (decl)) | |
7423 | { | |
7424 | if (!gave_void_only_once_err) | |
7425 | { | |
657e4e47 | 7426 | error_at (b->locus, "%<void%> must be the only parameter"); |
f75fbaf7 ZW |
7427 | gave_void_only_once_err = true; |
7428 | } | |
7429 | } | |
7430 | else | |
7431 | { | |
7432 | /* Valid parameter, add it to the list. */ | |
910ad8de | 7433 | DECL_CHAIN (decl) = parms; |
f75fbaf7 ZW |
7434 | parms = decl; |
7435 | ||
7436 | /* Since there is a prototype, args are passed in their | |
7437 | declared types. The back end may override this later. */ | |
7438 | DECL_ARG_TYPE (decl) = type; | |
7439 | types = tree_cons (0, type, types); | |
7440 | } | |
7441 | break; | |
55d54003 | 7442 | |
56141a6a | 7443 | case ENUMERAL_TYPE: keyword = "enum"; goto tag; |
f75fbaf7 | 7444 | case UNION_TYPE: keyword = "union"; goto tag; |
56141a6a | 7445 | case RECORD_TYPE: keyword = "struct"; goto tag; |
f75fbaf7 ZW |
7446 | tag: |
7447 | /* Types may not have tag-names, in which case the type | |
7448 | appears in the bindings list with b->id NULL. */ | |
7449 | if (b->id) | |
7450 | { | |
366de0ce | 7451 | gcc_assert (I_TAG_BINDING (b->id) == b); |
f75fbaf7 ZW |
7452 | I_TAG_BINDING (b->id) = b->shadowed; |
7453 | } | |
55d54003 | 7454 | |
f75fbaf7 ZW |
7455 | /* Warn about any struct, union or enum tags defined in a |
7456 | parameter list. The scope of such types is limited to | |
7457 | the parameter list, which is rarely if ever desirable | |
7458 | (it's impossible to call such a function with type- | |
7459 | correct arguments). An anonymous union parm type is | |
7460 | meaningful as a GNU extension, so don't warn for that. */ | |
3fa8871b | 7461 | if (TREE_CODE (decl) != UNION_TYPE || b->id != NULL_TREE) |
f75fbaf7 ZW |
7462 | { |
7463 | if (b->id) | |
7464 | /* The %s will be one of 'struct', 'union', or 'enum'. */ | |
657e4e47 | 7465 | warning_at (b->locus, 0, |
46308474 LFSM |
7466 | "%<%s %E%> declared inside parameter list" |
7467 | " will not be visible outside of this definition or" | |
7468 | " declaration", keyword, b->id); | |
f75fbaf7 ZW |
7469 | else |
7470 | /* The %s will be one of 'struct', 'union', or 'enum'. */ | |
657e4e47 | 7471 | warning_at (b->locus, 0, |
46308474 LFSM |
7472 | "anonymous %s declared inside parameter list" |
7473 | " will not be visible outside of this definition or" | |
7474 | " declaration", keyword); | |
f75fbaf7 | 7475 | } |
55d54003 | 7476 | |
f32682ca DN |
7477 | tag.id = b->id; |
7478 | tag.type = decl; | |
9771b263 | 7479 | vec_safe_push (tags, tag); |
f75fbaf7 ZW |
7480 | break; |
7481 | ||
29b9828f | 7482 | case FUNCTION_DECL: |
08203f73 MP |
7483 | /* FUNCTION_DECLs appear when there is an implicit function |
7484 | declaration in the parameter list. */ | |
7485 | gcc_assert (b->nested || seen_error ()); | |
29b9828f BS |
7486 | goto set_shadowed; |
7487 | ||
f75fbaf7 ZW |
7488 | case CONST_DECL: |
7489 | case TYPE_DECL: | |
7490 | /* CONST_DECLs appear here when we have an embedded enum, | |
7491 | and TYPE_DECLs appear here when we have an embedded struct | |
7492 | or union. No warnings for this - we already warned about the | |
29b9828f | 7493 | type itself. */ |
ee060229 | 7494 | |
10e76c1a JM |
7495 | /* When we reinsert this decl in the function body, we need |
7496 | to reconstruct whether it was marked as nested. */ | |
29b9828f | 7497 | gcc_assert (!b->nested); |
910ad8de | 7498 | DECL_CHAIN (decl) = others; |
18d5f982 ZW |
7499 | others = decl; |
7500 | /* fall through */ | |
7501 | ||
7502 | case ERROR_MARK: | |
29b9828f | 7503 | set_shadowed: |
18d5f982 ZW |
7504 | /* error_mark_node appears here when we have an undeclared |
7505 | variable. Just throw it away. */ | |
f75fbaf7 ZW |
7506 | if (b->id) |
7507 | { | |
366de0ce | 7508 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 ZW |
7509 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
7510 | } | |
f75fbaf7 ZW |
7511 | break; |
7512 | ||
7513 | /* Other things that might be encountered. */ | |
7514 | case LABEL_DECL: | |
f75fbaf7 | 7515 | case VAR_DECL: |
f75fbaf7 | 7516 | default: |
366de0ce | 7517 | gcc_unreachable (); |
f75fbaf7 ZW |
7518 | } |
7519 | ||
7520 | b = free_binding_and_advance (b); | |
55d54003 ZW |
7521 | } |
7522 | ||
f8893e47 JM |
7523 | arg_info->parms = parms; |
7524 | arg_info->tags = tags; | |
7525 | arg_info->types = types; | |
7526 | arg_info->others = others; | |
a04a722b | 7527 | arg_info->pending_sizes = expr; |
f75fbaf7 | 7528 | return arg_info; |
51e29401 RS |
7529 | } |
7530 | \f | |
7531 | /* Get the struct, enum or union (CODE says which) with tag NAME. | |
c2255bc4 AH |
7532 | Define the tag as a forward-reference with location LOC if it is |
7533 | not defined. Return a c_typespec structure for the type | |
7534 | specifier. */ | |
51e29401 | 7535 | |
81da229b | 7536 | struct c_typespec |
c2255bc4 | 7537 | parser_xref_tag (location_t loc, enum tree_code code, tree name) |
51e29401 | 7538 | { |
81da229b | 7539 | struct c_typespec ret; |
928c19bb | 7540 | tree ref; |
24b97832 | 7541 | location_t refloc; |
928c19bb JM |
7542 | |
7543 | ret.expr = NULL_TREE; | |
7544 | ret.expr_const_operands = true; | |
7545 | ||
51e29401 RS |
7546 | /* If a cross reference is requested, look up the type |
7547 | already defined for this tag and return it. */ | |
7548 | ||
2f3bb934 | 7549 | ref = lookup_tag (code, name, false, &refloc); |
f18b70f5 JM |
7550 | /* If this is the right type of tag, return what we found. |
7551 | (This reference will be shadowed by shadow_tag later if appropriate.) | |
7552 | If this is the wrong type of tag, do not return it. If it was the | |
f8521984 ZW |
7553 | wrong type in the same scope, we will have had an error |
7554 | message already; if in a different scope and declaring | |
f18b70f5 | 7555 | a name, pending_xref_error will give an error message; but if in a |
f8521984 | 7556 | different scope and not declaring a name, this tag should |
f18b70f5 JM |
7557 | shadow the previous declaration of a different type of tag, and |
7558 | this would not work properly if we return the reference found. | |
7559 | (For example, with "struct foo" in an outer scope, "union foo;" | |
7560 | must shadow that tag with a new one of union type.) */ | |
81da229b | 7561 | ret.kind = (ref ? ctsk_tagref : ctsk_tagfirstref); |
f18b70f5 | 7562 | if (ref && TREE_CODE (ref) == code) |
81da229b | 7563 | { |
24b97832 ILT |
7564 | if (C_TYPE_DEFINED_IN_STRUCT (ref) |
7565 | && loc != UNKNOWN_LOCATION | |
7566 | && warn_cxx_compat) | |
7567 | { | |
7568 | switch (code) | |
7569 | { | |
7570 | case ENUMERAL_TYPE: | |
7571 | warning_at (loc, OPT_Wc___compat, | |
7572 | ("enum type defined in struct or union " | |
7573 | "is not visible in C++")); | |
7574 | inform (refloc, "enum type defined here"); | |
7575 | break; | |
7576 | case RECORD_TYPE: | |
7577 | warning_at (loc, OPT_Wc___compat, | |
7578 | ("struct defined in struct or union " | |
7579 | "is not visible in C++")); | |
7580 | inform (refloc, "struct defined here"); | |
7581 | break; | |
7582 | case UNION_TYPE: | |
7583 | warning_at (loc, OPT_Wc___compat, | |
7584 | ("union defined in struct or union " | |
7585 | "is not visible in C++")); | |
7586 | inform (refloc, "union defined here"); | |
7587 | break; | |
7588 | default: | |
7589 | gcc_unreachable(); | |
7590 | } | |
7591 | } | |
7592 | ||
81da229b JM |
7593 | ret.spec = ref; |
7594 | return ret; | |
7595 | } | |
51e29401 | 7596 | |
51e29401 RS |
7597 | /* If no such tag is yet defined, create a forward-reference node |
7598 | and record it as the "definition". | |
7599 | When a real declaration of this type is found, | |
7600 | the forward-reference will be altered into a real type. */ | |
7601 | ||
7602 | ref = make_node (code); | |
7603 | if (code == ENUMERAL_TYPE) | |
7604 | { | |
51e29401 RS |
7605 | /* Give the type a default layout like unsigned int |
7606 | to avoid crashing if it does not get defined. */ | |
179d2f74 | 7607 | SET_TYPE_MODE (ref, TYPE_MODE (unsigned_type_node)); |
fe37c7af | 7608 | SET_TYPE_ALIGN (ref, TYPE_ALIGN (unsigned_type_node)); |
11cf4d18 | 7609 | TYPE_USER_ALIGN (ref) = 0; |
8df83eae | 7610 | TYPE_UNSIGNED (ref) = 1; |
51e29401 RS |
7611 | TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node); |
7612 | TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node); | |
7613 | TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node); | |
7614 | } | |
7615 | ||
c2255bc4 | 7616 | pushtag (loc, name, ref); |
51e29401 | 7617 | |
81da229b JM |
7618 | ret.spec = ref; |
7619 | return ret; | |
7620 | } | |
7621 | ||
7622 | /* Get the struct, enum or union (CODE says which) with tag NAME. | |
7623 | Define the tag as a forward-reference if it is not defined. | |
7624 | Return a tree for the type. */ | |
7625 | ||
7626 | tree | |
7627 | xref_tag (enum tree_code code, tree name) | |
7628 | { | |
c2255bc4 | 7629 | return parser_xref_tag (input_location, code, name).spec; |
51e29401 RS |
7630 | } |
7631 | \f | |
f8521984 | 7632 | /* Make sure that the tag NAME is defined *in the current scope* |
51e29401 | 7633 | at least as a forward reference. |
c2255bc4 | 7634 | LOC is the location of the struct's definition. |
24b97832 ILT |
7635 | CODE says which kind of tag NAME ought to be. |
7636 | ||
dc491a25 ILT |
7637 | This stores the current value of the file static STRUCT_PARSE_INFO |
7638 | in *ENCLOSING_STRUCT_PARSE_INFO, and points STRUCT_PARSE_INFO at a | |
7639 | new c_struct_parse_info structure. The old value of | |
7640 | STRUCT_PARSE_INFO is restored in finish_struct. */ | |
51e29401 RS |
7641 | |
7642 | tree | |
c2255bc4 | 7643 | start_struct (location_t loc, enum tree_code code, tree name, |
dc491a25 | 7644 | struct c_struct_parse_info **enclosing_struct_parse_info) |
51e29401 | 7645 | { |
f8521984 | 7646 | /* If there is already a tag defined at this scope |
51e29401 RS |
7647 | (as a forward reference), just return it. */ |
7648 | ||
24b97832 ILT |
7649 | tree ref = NULL_TREE; |
7650 | location_t refloc = UNKNOWN_LOCATION; | |
51e29401 | 7651 | |
24b97832 | 7652 | if (name != NULL_TREE) |
2f3bb934 | 7653 | ref = lookup_tag (code, name, true, &refloc); |
51e29401 RS |
7654 | if (ref && TREE_CODE (ref) == code) |
7655 | { | |
dc949728 MP |
7656 | if (TYPE_STUB_DECL (ref)) |
7657 | refloc = DECL_SOURCE_LOCATION (TYPE_STUB_DECL (ref)); | |
7658 | ||
085e33aa | 7659 | if (TYPE_SIZE (ref)) |
c22cacf3 | 7660 | { |
53fcdc76 | 7661 | if (code == UNION_TYPE) |
24b97832 | 7662 | error_at (loc, "redefinition of %<union %E%>", name); |
c22cacf3 | 7663 | else |
24b97832 ILT |
7664 | error_at (loc, "redefinition of %<struct %E%>", name); |
7665 | if (refloc != UNKNOWN_LOCATION) | |
7666 | inform (refloc, "originally defined here"); | |
a03813c8 SE |
7667 | /* Don't create structures using a name already in use. */ |
7668 | ref = NULL_TREE; | |
35b1a6fa | 7669 | } |
085e33aa JM |
7670 | else if (C_TYPE_BEING_DEFINED (ref)) |
7671 | { | |
7672 | if (code == UNION_TYPE) | |
24b97832 | 7673 | error_at (loc, "nested redefinition of %<union %E%>", name); |
c22cacf3 | 7674 | else |
24b97832 ILT |
7675 | error_at (loc, "nested redefinition of %<struct %E%>", name); |
7676 | /* Don't bother to report "originally defined here" for a | |
7677 | nested redefinition; the original definition should be | |
7678 | obvious. */ | |
71113fcd GK |
7679 | /* Don't create structures that contain themselves. */ |
7680 | ref = NULL_TREE; | |
085e33aa | 7681 | } |
51e29401 RS |
7682 | } |
7683 | ||
71113fcd GK |
7684 | /* Otherwise create a forward-reference just so the tag is in scope. */ |
7685 | ||
7686 | if (ref == NULL_TREE || TREE_CODE (ref) != code) | |
7687 | { | |
5326cd3d | 7688 | ref = make_node (code); |
c2255bc4 | 7689 | pushtag (loc, name, ref); |
5326cd3d | 7690 | } |
35b1a6fa | 7691 | |
51e29401 | 7692 | C_TYPE_BEING_DEFINED (ref) = 1; |
a4850ce9 JH |
7693 | for (tree v = TYPE_MAIN_VARIANT (ref); v; v = TYPE_NEXT_VARIANT (v)) |
7694 | TYPE_PACKED (v) = flag_pack_struct; | |
24b97832 | 7695 | |
dc491a25 | 7696 | *enclosing_struct_parse_info = struct_parse_info; |
bf4fa671 | 7697 | struct_parse_info = new c_struct_parse_info (); |
24b97832 ILT |
7698 | |
7699 | /* FIXME: This will issue a warning for a use of a type defined | |
7700 | within a statement expr used within sizeof, et. al. This is not | |
7701 | terribly serious as C++ doesn't permit statement exprs within | |
7702 | sizeof anyhow. */ | |
7703 | if (warn_cxx_compat && (in_sizeof || in_typeof || in_alignof)) | |
7704 | warning_at (loc, OPT_Wc___compat, | |
7705 | "defining type in %qs expression is invalid in C++", | |
7706 | (in_sizeof | |
7707 | ? "sizeof" | |
7708 | : (in_typeof ? "typeof" : "alignof"))); | |
7709 | ||
51e29401 RS |
7710 | return ref; |
7711 | } | |
7712 | ||
f8893e47 | 7713 | /* Process the specs, declarator and width (NULL if omitted) |
51e29401 | 7714 | of a structure component, returning a FIELD_DECL node. |
2ff7cce4 | 7715 | WIDTH is non-NULL for bit-fields only, and is an INTEGER_CST node. |
b9baeecd | 7716 | DECL_ATTRS is as for grokdeclarator. |
51e29401 | 7717 | |
3d10ed6c AH |
7718 | LOC is the location of the structure component. |
7719 | ||
51e29401 RS |
7720 | This is done during the parsing of the struct declaration. |
7721 | The FIELD_DECL nodes are chained together and the lot of them | |
7722 | are ultimately passed to `build_struct' to make the RECORD_TYPE node. */ | |
7723 | ||
7724 | tree | |
3d10ed6c AH |
7725 | grokfield (location_t loc, |
7726 | struct c_declarator *declarator, struct c_declspecs *declspecs, | |
b9baeecd | 7727 | tree width, tree *decl_attrs) |
51e29401 RS |
7728 | { |
7729 | tree value; | |
7730 | ||
f8893e47 JM |
7731 | if (declarator->kind == cdk_id && declarator->u.id == NULL_TREE |
7732 | && width == NULL_TREE) | |
3e96a2fd | 7733 | { |
750491fc RH |
7734 | /* This is an unnamed decl. |
7735 | ||
7736 | If we have something of the form "union { list } ;" then this | |
7737 | is the anonymous union extension. Similarly for struct. | |
7738 | ||
7739 | If this is something of the form "struct foo;", then | |
478a1c5b ILT |
7740 | If MS or Plan 9 extensions are enabled, this is handled as |
7741 | an anonymous struct. | |
750491fc RH |
7742 | Otherwise this is a forward declaration of a structure tag. |
7743 | ||
7744 | If this is something of the form "foo;" and foo is a TYPE_DECL, then | |
4bdd0a60 | 7745 | If foo names a structure or union without a tag, then this |
48b0b196 | 7746 | is an anonymous struct (this is permitted by C11). |
478a1c5b ILT |
7747 | If MS or Plan 9 extensions are enabled and foo names a |
7748 | structure, then again this is an anonymous struct. | |
750491fc RH |
7749 | Otherwise this is an error. |
7750 | ||
95bd1dd7 | 7751 | Oh what a horrid tangled web we weave. I wonder if MS consciously |
750491fc RH |
7752 | took this from Plan 9 or if it was an accident of implementation |
7753 | that took root before someone noticed the bug... */ | |
7754 | ||
deb176fa | 7755 | tree type = declspecs->type; |
216a5f1b | 7756 | bool ok = false; |
85d49058 | 7757 | |
8595f67b | 7758 | if (RECORD_OR_UNION_TYPE_P (type) |
ff8e2159 JM |
7759 | && (flag_ms_extensions |
7760 | || flag_plan9_extensions | |
7761 | || !declspecs->typedef_p)) | |
750491fc | 7762 | { |
478a1c5b | 7763 | if (flag_ms_extensions || flag_plan9_extensions) |
216a5f1b | 7764 | ok = true; |
ff8e2159 | 7765 | else if (TYPE_NAME (type) == NULL) |
216a5f1b | 7766 | ok = true; |
750491fc | 7767 | else |
216a5f1b | 7768 | ok = false; |
750491fc | 7769 | } |
216a5f1b | 7770 | if (!ok) |
3e96a2fd | 7771 | { |
3d10ed6c | 7772 | pedwarn (loc, 0, "declaration does not declare anything"); |
3e96a2fd DD |
7773 | return NULL_TREE; |
7774 | } | |
35aff4fb MP |
7775 | if (flag_isoc99) |
7776 | pedwarn_c99 (loc, OPT_Wpedantic, | |
4bdd0a60 | 7777 | "ISO C99 doesn%'t support unnamed structs/unions"); |
35aff4fb MP |
7778 | else |
7779 | pedwarn_c99 (loc, OPT_Wpedantic, | |
4bdd0a60 | 7780 | "ISO C90 doesn%'t support unnamed structs/unions"); |
3e96a2fd DD |
7781 | } |
7782 | ||
60919bce | 7783 | value = grokdeclarator (declarator, declspecs, FIELD, false, |
928c19bb | 7784 | width ? &width : NULL, decl_attrs, NULL, NULL, |
b9baeecd | 7785 | DEPRECATED_NORMAL); |
51e29401 | 7786 | |
c2255bc4 | 7787 | finish_decl (value, loc, NULL_TREE, NULL_TREE, NULL_TREE); |
dfd48d76 | 7788 | DECL_INITIAL (value) = width; |
7d386d45 JJ |
7789 | if (width) |
7790 | SET_DECL_C_BIT_FIELD (value); | |
51e29401 | 7791 | |
dc491a25 ILT |
7792 | if (warn_cxx_compat && DECL_NAME (value) != NULL_TREE) |
7793 | { | |
7794 | /* If we currently have a binding for this field, set the | |
7795 | in_struct field in the binding, so that we warn about lookups | |
7796 | which find it. */ | |
7797 | struct c_binding *b = I_SYMBOL_BINDING (DECL_NAME (value)); | |
7798 | if (b != NULL) | |
7799 | { | |
7800 | /* If the in_struct field is not yet set, push it on a list | |
7801 | to be cleared when this struct is finished. */ | |
7802 | if (!b->in_struct) | |
7803 | { | |
9771b263 | 7804 | struct_parse_info->fields.safe_push (b); |
dc491a25 ILT |
7805 | b->in_struct = 1; |
7806 | } | |
7807 | } | |
7808 | } | |
7809 | ||
51e29401 RS |
7810 | return value; |
7811 | } | |
7812 | \f | |
478a1c5b ILT |
7813 | /* Subroutine of detect_field_duplicates: return whether X and Y, |
7814 | which are both fields in the same struct, have duplicate field | |
7815 | names. */ | |
7816 | ||
7817 | static bool | |
7818 | is_duplicate_field (tree x, tree y) | |
7819 | { | |
7820 | if (DECL_NAME (x) != NULL_TREE && DECL_NAME (x) == DECL_NAME (y)) | |
7821 | return true; | |
7822 | ||
7823 | /* When using -fplan9-extensions, an anonymous field whose name is a | |
7824 | typedef can duplicate a field name. */ | |
7825 | if (flag_plan9_extensions | |
7826 | && (DECL_NAME (x) == NULL_TREE || DECL_NAME (y) == NULL_TREE)) | |
7827 | { | |
7828 | tree xt, xn, yt, yn; | |
7829 | ||
7830 | xt = TREE_TYPE (x); | |
7831 | if (DECL_NAME (x) != NULL_TREE) | |
7832 | xn = DECL_NAME (x); | |
3e636daf | 7833 | else if (RECORD_OR_UNION_TYPE_P (xt) |
478a1c5b ILT |
7834 | && TYPE_NAME (xt) != NULL_TREE |
7835 | && TREE_CODE (TYPE_NAME (xt)) == TYPE_DECL) | |
7836 | xn = DECL_NAME (TYPE_NAME (xt)); | |
7837 | else | |
7838 | xn = NULL_TREE; | |
7839 | ||
7840 | yt = TREE_TYPE (y); | |
7841 | if (DECL_NAME (y) != NULL_TREE) | |
7842 | yn = DECL_NAME (y); | |
3e636daf | 7843 | else if (RECORD_OR_UNION_TYPE_P (yt) |
478a1c5b ILT |
7844 | && TYPE_NAME (yt) != NULL_TREE |
7845 | && TREE_CODE (TYPE_NAME (yt)) == TYPE_DECL) | |
7846 | yn = DECL_NAME (TYPE_NAME (yt)); | |
7847 | else | |
7848 | yn = NULL_TREE; | |
7849 | ||
7850 | if (xn != NULL_TREE && xn == yn) | |
7851 | return true; | |
7852 | } | |
7853 | ||
7854 | return false; | |
7855 | } | |
7856 | ||
492fc0ee JM |
7857 | /* Subroutine of detect_field_duplicates: add the fields of FIELDLIST |
7858 | to HTAB, giving errors for any duplicates. */ | |
7859 | ||
7860 | static void | |
703c8606 | 7861 | detect_field_duplicates_hash (tree fieldlist, |
8d67ee55 | 7862 | hash_table<nofree_ptr_hash <tree_node> > *htab) |
492fc0ee JM |
7863 | { |
7864 | tree x, y; | |
703c8606 | 7865 | tree_node **slot; |
492fc0ee | 7866 | |
910ad8de | 7867 | for (x = fieldlist; x ; x = DECL_CHAIN (x)) |
3fa8871b | 7868 | if ((y = DECL_NAME (x)) != NULL_TREE) |
492fc0ee | 7869 | { |
c203e8a7 | 7870 | slot = htab->find_slot (y, INSERT); |
492fc0ee JM |
7871 | if (*slot) |
7872 | { | |
7873 | error ("duplicate member %q+D", x); | |
7874 | DECL_NAME (x) = NULL_TREE; | |
7875 | } | |
7876 | *slot = y; | |
7877 | } | |
3e636daf | 7878 | else if (RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))) |
478a1c5b ILT |
7879 | { |
7880 | detect_field_duplicates_hash (TYPE_FIELDS (TREE_TYPE (x)), htab); | |
7881 | ||
7882 | /* When using -fplan9-extensions, an anonymous field whose | |
7883 | name is a typedef can duplicate a field name. */ | |
7884 | if (flag_plan9_extensions | |
7885 | && TYPE_NAME (TREE_TYPE (x)) != NULL_TREE | |
7886 | && TREE_CODE (TYPE_NAME (TREE_TYPE (x))) == TYPE_DECL) | |
7887 | { | |
7888 | tree xn = DECL_NAME (TYPE_NAME (TREE_TYPE (x))); | |
c203e8a7 | 7889 | slot = htab->find_slot (xn, INSERT); |
478a1c5b ILT |
7890 | if (*slot) |
7891 | error ("duplicate member %q+D", TYPE_NAME (TREE_TYPE (x))); | |
7892 | *slot = xn; | |
7893 | } | |
7894 | } | |
492fc0ee JM |
7895 | } |
7896 | ||
66ea6f4c RH |
7897 | /* Generate an error for any duplicate field names in FIELDLIST. Munge |
7898 | the list such that this does not present a problem later. */ | |
7899 | ||
7900 | static void | |
7901 | detect_field_duplicates (tree fieldlist) | |
7902 | { | |
7903 | tree x, y; | |
7904 | int timeout = 10; | |
7905 | ||
c0c24aa4 | 7906 | /* If the struct is the list of instance variables of an Objective-C |
0dc33c3c NP |
7907 | class, then we need to check all the instance variables of |
7908 | superclasses when checking for duplicates (since you can't have | |
c0c24aa4 | 7909 | an instance variable in a subclass with the same name as an |
0dc33c3c NP |
7910 | instance variable in a superclass). We pass on this job to the |
7911 | Objective-C compiler. objc_detect_field_duplicates() will return | |
7912 | false if we are not checking the list of instance variables and | |
7913 | the C frontend should proceed with the standard field duplicate | |
7914 | checks. If we are checking the list of instance variables, the | |
7915 | ObjC frontend will do the check, emit the errors if needed, and | |
7916 | then return true. */ | |
c0c24aa4 | 7917 | if (c_dialect_objc ()) |
0dc33c3c NP |
7918 | if (objc_detect_field_duplicates (false)) |
7919 | return; | |
c0c24aa4 | 7920 | |
66ea6f4c RH |
7921 | /* First, see if there are more than "a few" fields. |
7922 | This is trivially true if there are zero or one fields. */ | |
b3c1008c | 7923 | if (!fieldlist || !DECL_CHAIN (fieldlist)) |
66ea6f4c | 7924 | return; |
b3c1008c | 7925 | x = fieldlist; |
66ea6f4c RH |
7926 | do { |
7927 | timeout--; | |
492fc0ee | 7928 | if (DECL_NAME (x) == NULL_TREE |
3e636daf | 7929 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))) |
492fc0ee | 7930 | timeout = 0; |
910ad8de | 7931 | x = DECL_CHAIN (x); |
66ea6f4c RH |
7932 | } while (timeout > 0 && x); |
7933 | ||
492fc0ee JM |
7934 | /* If there were "few" fields and no anonymous structures or unions, |
7935 | avoid the overhead of allocating a hash table. Instead just do | |
7936 | the nested traversal thing. */ | |
66ea6f4c RH |
7937 | if (timeout > 0) |
7938 | { | |
f7587ed0 | 7939 | for (x = DECL_CHAIN (fieldlist); x; x = DECL_CHAIN (x)) |
478a1c5b ILT |
7940 | /* When using -fplan9-extensions, we can have duplicates |
7941 | between typedef names and fields. */ | |
7942 | if (DECL_NAME (x) | |
7943 | || (flag_plan9_extensions | |
7944 | && DECL_NAME (x) == NULL_TREE | |
3e636daf | 7945 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x)) |
478a1c5b ILT |
7946 | && TYPE_NAME (TREE_TYPE (x)) != NULL_TREE |
7947 | && TREE_CODE (TYPE_NAME (TREE_TYPE (x))) == TYPE_DECL)) | |
66ea6f4c RH |
7948 | { |
7949 | for (y = fieldlist; y != x; y = TREE_CHAIN (y)) | |
478a1c5b | 7950 | if (is_duplicate_field (y, x)) |
66ea6f4c | 7951 | { |
dee15844 | 7952 | error ("duplicate member %q+D", x); |
66ea6f4c RH |
7953 | DECL_NAME (x) = NULL_TREE; |
7954 | } | |
7955 | } | |
7956 | } | |
7957 | else | |
7958 | { | |
8d67ee55 | 7959 | hash_table<nofree_ptr_hash <tree_node> > htab (37); |
c203e8a7 | 7960 | detect_field_duplicates_hash (fieldlist, &htab); |
66ea6f4c RH |
7961 | } |
7962 | } | |
7963 | ||
dc491a25 ILT |
7964 | /* Finish up struct info used by -Wc++-compat. */ |
7965 | ||
7966 | static void | |
bc51ace3 PK |
7967 | warn_cxx_compat_finish_struct (tree fieldlist, enum tree_code code, |
7968 | location_t record_loc) | |
dc491a25 ILT |
7969 | { |
7970 | unsigned int ix; | |
7971 | tree x; | |
7972 | struct c_binding *b; | |
7973 | ||
bc51ace3 PK |
7974 | if (fieldlist == NULL_TREE) |
7975 | { | |
7976 | if (code == RECORD_TYPE) | |
7977 | warning_at (record_loc, OPT_Wc___compat, | |
7978 | "empty struct has size 0 in C, size 1 in C++"); | |
7979 | else | |
7980 | warning_at (record_loc, OPT_Wc___compat, | |
7981 | "empty union has size 0 in C, size 1 in C++"); | |
7982 | } | |
7983 | ||
dc491a25 ILT |
7984 | /* Set the C_TYPE_DEFINED_IN_STRUCT flag for each type defined in |
7985 | the current struct. We do this now at the end of the struct | |
7986 | because the flag is used to issue visibility warnings, and we | |
7987 | only want to issue those warnings if the type is referenced | |
7988 | outside of the struct declaration. */ | |
9771b263 | 7989 | FOR_EACH_VEC_ELT (struct_parse_info->struct_types, ix, x) |
dc491a25 ILT |
7990 | C_TYPE_DEFINED_IN_STRUCT (x) = 1; |
7991 | ||
7992 | /* The TYPEDEFS_SEEN field of STRUCT_PARSE_INFO is a list of | |
7993 | typedefs used when declaring fields in this struct. If the name | |
7994 | of any of the fields is also a typedef name then the struct would | |
7995 | not parse in C++, because the C++ lookup rules say that the | |
7996 | typedef name would be looked up in the context of the struct, and | |
7997 | would thus be the field rather than the typedef. */ | |
9771b263 | 7998 | if (!struct_parse_info->typedefs_seen.is_empty () |
dc491a25 ILT |
7999 | && fieldlist != NULL_TREE) |
8000 | { | |
6e2830c3 TS |
8001 | /* Use a hash_set<tree> using the name of the typedef. We can use |
8002 | a hash_set<tree> because identifiers are interned. */ | |
8003 | hash_set<tree> tset; | |
dc491a25 | 8004 | |
9771b263 | 8005 | FOR_EACH_VEC_ELT (struct_parse_info->typedefs_seen, ix, x) |
6e2830c3 | 8006 | tset.add (DECL_NAME (x)); |
dc491a25 | 8007 | |
910ad8de | 8008 | for (x = fieldlist; x != NULL_TREE; x = DECL_CHAIN (x)) |
dc491a25 | 8009 | { |
a75de692 | 8010 | if (DECL_NAME (x) != NULL_TREE |
6e2830c3 | 8011 | && tset.contains (DECL_NAME (x))) |
dc491a25 ILT |
8012 | { |
8013 | warning_at (DECL_SOURCE_LOCATION (x), OPT_Wc___compat, | |
8014 | ("using %qD as both field and typedef name is " | |
8015 | "invalid in C++"), | |
8016 | x); | |
8017 | /* FIXME: It would be nice to report the location where | |
8018 | the typedef name is used. */ | |
8019 | } | |
8020 | } | |
dc491a25 ILT |
8021 | } |
8022 | ||
8023 | /* For each field which has a binding and which was not defined in | |
8024 | an enclosing struct, clear the in_struct field. */ | |
9771b263 | 8025 | FOR_EACH_VEC_ELT (struct_parse_info->fields, ix, b) |
dc491a25 ILT |
8026 | b->in_struct = 0; |
8027 | } | |
8028 | ||
6836632e NS |
8029 | /* Function to help qsort sort FIELD_DECLs by name order. */ |
8030 | ||
8031 | static int | |
8032 | field_decl_cmp (const void *x_p, const void *y_p) | |
8033 | { | |
8034 | const tree *const x = (const tree *) x_p; | |
8035 | const tree *const y = (const tree *) y_p; | |
8036 | ||
8037 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
8038 | /* A nontype is "greater" than a type. */ | |
8039 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
8040 | if (DECL_NAME (*x) == NULL_TREE) | |
8041 | return -1; | |
8042 | if (DECL_NAME (*y) == NULL_TREE) | |
8043 | return 1; | |
8044 | if (DECL_NAME (*x) < DECL_NAME (*y)) | |
8045 | return -1; | |
8046 | return 1; | |
8047 | } | |
8048 | ||
51e29401 | 8049 | /* Fill in the fields of a RECORD_TYPE or UNION_TYPE node, T. |
c2255bc4 | 8050 | LOC is the location of the RECORD_TYPE or UNION_TYPE's definition. |
7a0347ff | 8051 | FIELDLIST is a chain of FIELD_DECL nodes for the fields. |
24b97832 ILT |
8052 | ATTRIBUTES are attributes to be applied to the structure. |
8053 | ||
dc491a25 ILT |
8054 | ENCLOSING_STRUCT_PARSE_INFO is the value of STRUCT_PARSE_INFO when |
8055 | the struct was started. */ | |
51e29401 RS |
8056 | |
8057 | tree | |
c2255bc4 | 8058 | finish_struct (location_t loc, tree t, tree fieldlist, tree attributes, |
dc491a25 | 8059 | struct c_struct_parse_info *enclosing_struct_parse_info) |
51e29401 | 8060 | { |
b3694847 | 8061 | tree x; |
f75fbaf7 | 8062 | bool toplevel = file_scope == current_scope; |
51e29401 RS |
8063 | |
8064 | /* If this type was previously laid out as a forward reference, | |
8065 | make sure we lay it out again. */ | |
8066 | ||
3fa8871b | 8067 | TYPE_SIZE (t) = NULL_TREE; |
51e29401 | 8068 | |
91d231cb | 8069 | decl_attributes (&t, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE); |
10861e9a | 8070 | |
9590fa72 RK |
8071 | if (pedantic) |
8072 | { | |
910ad8de | 8073 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
4bdd0a60 | 8074 | { |
3fa8871b | 8075 | if (DECL_NAME (x) != NULL_TREE) |
4bdd0a60 | 8076 | break; |
3e636daf | 8077 | if (flag_isoc11 && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))) |
4bdd0a60 JM |
8078 | break; |
8079 | } | |
9590fa72 | 8080 | |
3fa8871b | 8081 | if (x == NULL_TREE) |
cc0b9d52 JM |
8082 | { |
8083 | if (TREE_CODE (t) == UNION_TYPE) | |
8084 | { | |
8085 | if (fieldlist) | |
c1771a20 | 8086 | pedwarn (loc, OPT_Wpedantic, "union has no named members"); |
cc0b9d52 | 8087 | else |
c1771a20 | 8088 | pedwarn (loc, OPT_Wpedantic, "union has no members"); |
cc0b9d52 JM |
8089 | } |
8090 | else | |
8091 | { | |
8092 | if (fieldlist) | |
c1771a20 | 8093 | pedwarn (loc, OPT_Wpedantic, "struct has no named members"); |
cc0b9d52 | 8094 | else |
c1771a20 | 8095 | pedwarn (loc, OPT_Wpedantic, "struct has no members"); |
cc0b9d52 JM |
8096 | } |
8097 | } | |
9590fa72 | 8098 | } |
51e29401 | 8099 | |
dfd48d76 | 8100 | /* Install struct as DECL_CONTEXT of each field decl. |
bc15d0ef JM |
8101 | Also process specified field sizes, found in the DECL_INITIAL, |
8102 | storing 0 there after the type has been changed to precision equal | |
8103 | to its width, rather than the precision of the specified standard | |
8104 | type. (Correct layout requires the original type to have been preserved | |
8105 | until now.) */ | |
51e29401 | 8106 | |
e3455240 | 8107 | bool saw_named_field = false; |
910ad8de | 8108 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
51e29401 | 8109 | { |
4271a6f3 VR |
8110 | if (TREE_TYPE (x) == error_mark_node) |
8111 | continue; | |
8112 | ||
51e29401 | 8113 | DECL_CONTEXT (x) = t; |
646c0835 | 8114 | |
51e29401 RS |
8115 | /* If any field is const, the structure type is pseudo-const. */ |
8116 | if (TREE_READONLY (x)) | |
8117 | C_TYPE_FIELDS_READONLY (t) = 1; | |
8118 | else | |
8119 | { | |
8120 | /* A field that is pseudo-const makes the structure likewise. */ | |
51f4ec66 | 8121 | tree t1 = strip_array_types (TREE_TYPE (x)); |
3e636daf | 8122 | if (RECORD_OR_UNION_TYPE_P (t1) && C_TYPE_FIELDS_READONLY (t1)) |
51e29401 RS |
8123 | C_TYPE_FIELDS_READONLY (t) = 1; |
8124 | } | |
8125 | ||
8126 | /* Any field that is volatile means variables of this type must be | |
8127 | treated in some ways as volatile. */ | |
8128 | if (TREE_THIS_VOLATILE (x)) | |
8129 | C_TYPE_FIELDS_VOLATILE (t) = 1; | |
8130 | ||
8131 | /* Any field of nominal variable size implies structure is too. */ | |
8132 | if (C_DECL_VARIABLE_SIZE (x)) | |
8133 | C_TYPE_VARIABLE_SIZE (t) = 1; | |
8134 | ||
7d386d45 | 8135 | if (DECL_C_BIT_FIELD (x)) |
dfd48d76 | 8136 | { |
ae7e9ddd | 8137 | unsigned HOST_WIDE_INT width = tree_to_uhwi (DECL_INITIAL (x)); |
2ff7cce4 JM |
8138 | DECL_SIZE (x) = bitsize_int (width); |
8139 | DECL_BIT_FIELD (x) = 1; | |
dfd48d76 NB |
8140 | } |
8141 | ||
2cd36c22 AN |
8142 | if (TYPE_PACKED (t) |
8143 | && (DECL_BIT_FIELD (x) | |
8144 | || TYPE_ALIGN (TREE_TYPE (x)) > BITS_PER_UNIT)) | |
8145 | DECL_PACKED (x) = 1; | |
8146 | ||
ffc5c6a9 RH |
8147 | /* Detect flexible array member in an invalid context. */ |
8148 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE | |
8149 | && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE | |
8150 | && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE | |
8151 | && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE) | |
8152 | { | |
8153 | if (TREE_CODE (t) == UNION_TYPE) | |
d915eec0 | 8154 | { |
c2255bc4 | 8155 | error_at (DECL_SOURCE_LOCATION (x), |
c5d75364 | 8156 | "flexible array member in union"); |
d915eec0 JJ |
8157 | TREE_TYPE (x) = error_mark_node; |
8158 | } | |
910ad8de | 8159 | else if (DECL_CHAIN (x) != NULL_TREE) |
d915eec0 | 8160 | { |
c2255bc4 | 8161 | error_at (DECL_SOURCE_LOCATION (x), |
c5d75364 | 8162 | "flexible array member not at end of struct"); |
d915eec0 JJ |
8163 | TREE_TYPE (x) = error_mark_node; |
8164 | } | |
3f75a254 | 8165 | else if (!saw_named_field) |
d915eec0 | 8166 | { |
c2255bc4 | 8167 | error_at (DECL_SOURCE_LOCATION (x), |
f618a472 MP |
8168 | "flexible array member in a struct with no named " |
8169 | "members"); | |
d915eec0 JJ |
8170 | TREE_TYPE (x) = error_mark_node; |
8171 | } | |
ffc5c6a9 | 8172 | } |
2984fe64 | 8173 | |
c5d75364 | 8174 | if (pedantic && TREE_CODE (t) == RECORD_TYPE |
2984fe64 | 8175 | && flexible_array_type_p (TREE_TYPE (x))) |
c1771a20 | 8176 | pedwarn (DECL_SOURCE_LOCATION (x), OPT_Wpedantic, |
c5d75364 | 8177 | "invalid use of structure with flexible array member"); |
2984fe64 | 8178 | |
4bdd0a60 | 8179 | if (DECL_NAME (x) |
3e636daf | 8180 | || RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))) |
e3455240 | 8181 | saw_named_field = true; |
05bccae2 | 8182 | } |
51e29401 | 8183 | |
66ea6f4c | 8184 | detect_field_duplicates (fieldlist); |
51e29401 RS |
8185 | |
8186 | /* Now we have the nearly final fieldlist. Record it, | |
8187 | then lay out the structure or union (including the fields). */ | |
8188 | ||
8189 | TYPE_FIELDS (t) = fieldlist; | |
8190 | ||
ee45a32d EB |
8191 | maybe_apply_pragma_scalar_storage_order (t); |
8192 | ||
51e29401 RS |
8193 | layout_type (t); |
8194 | ||
26d40c3d JM |
8195 | if (TYPE_SIZE_UNIT (t) |
8196 | && TREE_CODE (TYPE_SIZE_UNIT (t)) == INTEGER_CST | |
8197 | && !TREE_OVERFLOW (TYPE_SIZE_UNIT (t)) | |
8198 | && !valid_constant_size_p (TYPE_SIZE_UNIT (t))) | |
8199 | error ("type %qT is too large", t); | |
8200 | ||
ee45a32d EB |
8201 | /* Give bit-fields their proper types and rewrite the type of array fields |
8202 | with scalar component if the enclosing type has reverse storage order. */ | |
8203 | for (tree field = fieldlist; field; field = DECL_CHAIN (field)) | |
8204 | { | |
8205 | if (TREE_CODE (field) == FIELD_DECL | |
8206 | && DECL_INITIAL (field) | |
8207 | && TREE_TYPE (field) != error_mark_node) | |
bc15d0ef JM |
8208 | { |
8209 | unsigned HOST_WIDE_INT width | |
ee45a32d EB |
8210 | = tree_to_uhwi (DECL_INITIAL (field)); |
8211 | tree type = TREE_TYPE (field); | |
bc15d0ef | 8212 | if (width != TYPE_PRECISION (type)) |
48cc8d3b | 8213 | { |
ee45a32d | 8214 | TREE_TYPE (field) |
0b359b01 | 8215 | = c_build_bitfield_integer_type (width, TYPE_UNSIGNED (type)); |
899ca90e | 8216 | SET_DECL_MODE (field, TYPE_MODE (TREE_TYPE (field))); |
48cc8d3b | 8217 | } |
3fa8871b | 8218 | DECL_INITIAL (field) = NULL_TREE; |
bc15d0ef | 8219 | } |
ee45a32d EB |
8220 | else if (TYPE_REVERSE_STORAGE_ORDER (t) |
8221 | && TREE_CODE (field) == FIELD_DECL | |
8222 | && TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE) | |
8223 | { | |
8224 | tree ftype = TREE_TYPE (field); | |
8225 | tree ctype = strip_array_types (ftype); | |
8226 | if (!RECORD_OR_UNION_TYPE_P (ctype) && TYPE_MODE (ctype) != QImode) | |
8227 | { | |
8228 | tree fmain_type = TYPE_MAIN_VARIANT (ftype); | |
8229 | tree *typep = &fmain_type; | |
8230 | do { | |
8231 | *typep = build_distinct_type_copy (*typep); | |
8232 | TYPE_REVERSE_STORAGE_ORDER (*typep) = 1; | |
8233 | typep = &TREE_TYPE (*typep); | |
8234 | } while (TREE_CODE (*typep) == ARRAY_TYPE); | |
8235 | TREE_TYPE (field) | |
8236 | = c_build_qualified_type (fmain_type, TYPE_QUALS (ftype)); | |
8237 | } | |
8238 | } | |
8239 | } | |
51e29401 | 8240 | |
ffc5c6a9 RH |
8241 | /* Now we have the truly final field list. |
8242 | Store it in this type and in the variants. */ | |
51e29401 RS |
8243 | |
8244 | TYPE_FIELDS (t) = fieldlist; | |
8245 | ||
d07605f5 | 8246 | /* If there are lots of fields, sort so we can look through them fast. |
6614fd40 | 8247 | We arbitrarily consider 16 or more elts to be "a lot". */ |
d07605f5 AP |
8248 | |
8249 | { | |
8250 | int len = 0; | |
8251 | ||
910ad8de | 8252 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
d07605f5 | 8253 | { |
c22cacf3 MS |
8254 | if (len > 15 || DECL_NAME (x) == NULL) |
8255 | break; | |
8256 | len += 1; | |
d07605f5 AP |
8257 | } |
8258 | ||
8259 | if (len > 15) | |
8260 | { | |
c22cacf3 MS |
8261 | tree *field_array; |
8262 | struct lang_type *space; | |
8263 | struct sorted_fields_type *space2; | |
e13e48e7 | 8264 | |
c22cacf3 | 8265 | len += list_length (x); |
e13e48e7 | 8266 | |
c22cacf3 MS |
8267 | /* Use the same allocation policy here that make_node uses, to |
8268 | ensure that this lives as long as the rest of the struct decl. | |
8269 | All decls in an inline function need to be saved. */ | |
e13e48e7 | 8270 | |
766090c2 TS |
8271 | space = ggc_cleared_alloc<struct lang_type> (); |
8272 | space2 = (sorted_fields_type *) ggc_internal_alloc | |
a9429e29 | 8273 | (sizeof (struct sorted_fields_type) + len * sizeof (tree)); |
e13e48e7 | 8274 | |
c22cacf3 | 8275 | len = 0; |
d07605f5 AP |
8276 | space->s = space2; |
8277 | field_array = &space2->elts[0]; | |
910ad8de | 8278 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
c22cacf3 MS |
8279 | { |
8280 | field_array[len++] = x; | |
8281 | ||
8282 | /* If there is anonymous struct or union, break out of the loop. */ | |
8283 | if (DECL_NAME (x) == NULL) | |
8284 | break; | |
8285 | } | |
8286 | /* Found no anonymous struct/union. Add the TYPE_LANG_SPECIFIC. */ | |
8287 | if (x == NULL) | |
8288 | { | |
8289 | TYPE_LANG_SPECIFIC (t) = space; | |
8290 | TYPE_LANG_SPECIFIC (t)->s->len = len; | |
8291 | field_array = TYPE_LANG_SPECIFIC (t)->s->elts; | |
8292 | qsort (field_array, len, sizeof (tree), field_decl_cmp); | |
8293 | } | |
d07605f5 AP |
8294 | } |
8295 | } | |
e13e48e7 | 8296 | |
3a5d2ba4 JJ |
8297 | /* Note: C_TYPE_INCOMPLETE_VARS overloads TYPE_VFIELD which is used |
8298 | in dwarf2out via rest_of_decl_compilation below and means | |
8299 | something totally different. Since we will be clearing | |
8300 | C_TYPE_INCOMPLETE_VARS shortly after we iterate through them, | |
8301 | clear it ahead of time and avoid problems in dwarf2out. Ideally, | |
8302 | C_TYPE_INCOMPLETE_VARS should use some language specific | |
8303 | node. */ | |
8304 | tree incomplete_vars = C_TYPE_INCOMPLETE_VARS (TYPE_MAIN_VARIANT (t)); | |
51e29401 RS |
8305 | for (x = TYPE_MAIN_VARIANT (t); x; x = TYPE_NEXT_VARIANT (x)) |
8306 | { | |
8307 | TYPE_FIELDS (x) = TYPE_FIELDS (t); | |
8308 | TYPE_LANG_SPECIFIC (x) = TYPE_LANG_SPECIFIC (t); | |
692a7aa3 JM |
8309 | C_TYPE_FIELDS_READONLY (x) = C_TYPE_FIELDS_READONLY (t); |
8310 | C_TYPE_FIELDS_VOLATILE (x) = C_TYPE_FIELDS_VOLATILE (t); | |
8311 | C_TYPE_VARIABLE_SIZE (x) = C_TYPE_VARIABLE_SIZE (t); | |
3a5d2ba4 | 8312 | C_TYPE_INCOMPLETE_VARS (x) = NULL_TREE; |
51e29401 RS |
8313 | } |
8314 | ||
1604422c RK |
8315 | /* If this was supposed to be a transparent union, but we can't |
8316 | make it one, warn and turn off the flag. */ | |
8317 | if (TREE_CODE (t) == UNION_TYPE | |
ebf0bf7f | 8318 | && TYPE_TRANSPARENT_AGGR (t) |
eb3490b9 | 8319 | && (!TYPE_FIELDS (t) || TYPE_MODE (t) != DECL_MODE (TYPE_FIELDS (t)))) |
1604422c | 8320 | { |
ebf0bf7f | 8321 | TYPE_TRANSPARENT_AGGR (t) = 0; |
c2255bc4 | 8322 | warning_at (loc, 0, "union cannot be made transparent"); |
1604422c RK |
8323 | } |
8324 | ||
14ec014e JJ |
8325 | /* Update type location to the one of the definition, instead of e.g. |
8326 | a forward declaration. */ | |
8327 | if (TYPE_STUB_DECL (t)) | |
8328 | DECL_SOURCE_LOCATION (TYPE_STUB_DECL (t)) = loc; | |
8329 | ||
8330 | /* Finish debugging output for this type. */ | |
8331 | rest_of_type_compilation (t, toplevel); | |
8332 | ||
51e29401 | 8333 | /* If this structure or union completes the type of any previous |
3a5d2ba4 | 8334 | variable declaration, lay it out and output its rtl. */ |
d7438551 | 8335 | for (x = incomplete_vars; x; x = TREE_CHAIN (x)) |
51e29401 | 8336 | { |
bf7a697f ZW |
8337 | tree decl = TREE_VALUE (x); |
8338 | if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
8339 | layout_array_type (TREE_TYPE (decl)); | |
8340 | if (TREE_CODE (decl) != TYPE_DECL) | |
8341 | { | |
8342 | layout_decl (decl, 0); | |
8343 | if (c_dialect_objc ()) | |
8344 | objc_check_decl (decl); | |
0e6df31e | 8345 | rest_of_decl_compilation (decl, toplevel, 0); |
51e29401 RS |
8346 | } |
8347 | } | |
8348 | ||
ca6af4f8 RH |
8349 | /* If we're inside a function proper, i.e. not file-scope and not still |
8350 | parsing parameters, then arrange for the size of a variable sized type | |
8351 | to be bound now. */ | |
38e01f9e | 8352 | if (building_stmt_list_p () && variably_modified_type_p (t, NULL_TREE)) |
c2255bc4 AH |
8353 | add_stmt (build_stmt (loc, |
8354 | DECL_EXPR, build_decl (loc, TYPE_DECL, NULL, t))); | |
ca6af4f8 | 8355 | |
dc491a25 | 8356 | if (warn_cxx_compat) |
bc51ace3 | 8357 | warn_cxx_compat_finish_struct (fieldlist, TREE_CODE (t), loc); |
24b97832 | 8358 | |
bf4fa671 | 8359 | delete struct_parse_info; |
24b97832 | 8360 | |
dc491a25 | 8361 | struct_parse_info = enclosing_struct_parse_info; |
24b97832 ILT |
8362 | |
8363 | /* If this struct is defined inside a struct, add it to | |
dc491a25 ILT |
8364 | struct_types. */ |
8365 | if (warn_cxx_compat | |
8366 | && struct_parse_info != NULL | |
8367 | && !in_sizeof && !in_typeof && !in_alignof) | |
9771b263 | 8368 | struct_parse_info->struct_types.safe_push (t); |
24b97832 | 8369 | |
51e29401 RS |
8370 | return t; |
8371 | } | |
8372 | ||
6836632e NS |
8373 | static struct { |
8374 | gt_pointer_operator new_value; | |
8375 | void *cookie; | |
8376 | } resort_data; | |
8377 | ||
8378 | /* This routine compares two fields like field_decl_cmp but using the | |
8379 | pointer operator in resort_data. */ | |
8380 | ||
8381 | static int | |
8382 | resort_field_decl_cmp (const void *x_p, const void *y_p) | |
8383 | { | |
8384 | const tree *const x = (const tree *) x_p; | |
8385 | const tree *const y = (const tree *) y_p; | |
8386 | ||
8387 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
8388 | /* A nontype is "greater" than a type. */ | |
8389 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
8390 | if (DECL_NAME (*x) == NULL_TREE) | |
8391 | return -1; | |
8392 | if (DECL_NAME (*y) == NULL_TREE) | |
8393 | return 1; | |
8394 | { | |
8395 | tree d1 = DECL_NAME (*x); | |
8396 | tree d2 = DECL_NAME (*y); | |
8397 | resort_data.new_value (&d1, resort_data.cookie); | |
8398 | resort_data.new_value (&d2, resort_data.cookie); | |
8399 | if (d1 < d2) | |
8400 | return -1; | |
8401 | } | |
8402 | return 1; | |
8403 | } | |
8404 | ||
8405 | /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */ | |
8406 | ||
8407 | void | |
8408 | resort_sorted_fields (void *obj, | |
8409 | void * ARG_UNUSED (orig_obj), | |
8410 | gt_pointer_operator new_value, | |
8411 | void *cookie) | |
8412 | { | |
8413 | struct sorted_fields_type *sf = (struct sorted_fields_type *) obj; | |
8414 | resort_data.new_value = new_value; | |
8415 | resort_data.cookie = cookie; | |
8416 | qsort (&sf->elts[0], sf->len, sizeof (tree), | |
8417 | resort_field_decl_cmp); | |
8418 | } | |
8419 | ||
51e29401 RS |
8420 | /* Lay out the type T, and its element type, and so on. */ |
8421 | ||
8422 | static void | |
35b1a6fa | 8423 | layout_array_type (tree t) |
51e29401 RS |
8424 | { |
8425 | if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE) | |
8426 | layout_array_type (TREE_TYPE (t)); | |
8427 | layout_type (t); | |
8428 | } | |
8429 | \f | |
8430 | /* Begin compiling the definition of an enumeration type. | |
8431 | NAME is its name (or null if anonymous). | |
c2255bc4 | 8432 | LOC is the enum's location. |
51e29401 RS |
8433 | Returns the type object, as yet incomplete. |
8434 | Also records info about it so that build_enumerator | |
8435 | may be used to declare the individual values as they are read. */ | |
8436 | ||
8437 | tree | |
c2255bc4 | 8438 | start_enum (location_t loc, struct c_enum_contents *the_enum, tree name) |
51e29401 | 8439 | { |
24b97832 ILT |
8440 | tree enumtype = NULL_TREE; |
8441 | location_t enumloc = UNKNOWN_LOCATION; | |
51e29401 RS |
8442 | |
8443 | /* If this is the real definition for a previous forward reference, | |
8444 | fill in the contents in the same object that used to be the | |
8445 | forward reference. */ | |
8446 | ||
24b97832 | 8447 | if (name != NULL_TREE) |
2f3bb934 | 8448 | enumtype = lookup_tag (ENUMERAL_TYPE, name, true, &enumloc); |
51e29401 | 8449 | |
2f3bb934 | 8450 | if (enumtype == NULL_TREE || TREE_CODE (enumtype) != ENUMERAL_TYPE) |
51e29401 RS |
8451 | { |
8452 | enumtype = make_node (ENUMERAL_TYPE); | |
c2255bc4 | 8453 | pushtag (loc, name, enumtype); |
51e29401 | 8454 | } |
01e5af5a JJ |
8455 | /* Update type location to the one of the definition, instead of e.g. |
8456 | a forward declaration. */ | |
8457 | else if (TYPE_STUB_DECL (enumtype)) | |
dc949728 MP |
8458 | { |
8459 | enumloc = DECL_SOURCE_LOCATION (TYPE_STUB_DECL (enumtype)); | |
8460 | DECL_SOURCE_LOCATION (TYPE_STUB_DECL (enumtype)) = loc; | |
8461 | } | |
51e29401 | 8462 | |
085e33aa | 8463 | if (C_TYPE_BEING_DEFINED (enumtype)) |
24b97832 | 8464 | error_at (loc, "nested redefinition of %<enum %E%>", name); |
085e33aa | 8465 | |
51e29401 RS |
8466 | C_TYPE_BEING_DEFINED (enumtype) = 1; |
8467 | ||
3fa8871b | 8468 | if (TYPE_VALUES (enumtype) != NULL_TREE) |
51e29401 RS |
8469 | { |
8470 | /* This enum is a named one that has been declared already. */ | |
24b97832 ILT |
8471 | error_at (loc, "redeclaration of %<enum %E%>", name); |
8472 | if (enumloc != UNKNOWN_LOCATION) | |
8473 | inform (enumloc, "originally defined here"); | |
51e29401 RS |
8474 | |
8475 | /* Completely replace its old definition. | |
8476 | The old enumerators remain defined, however. */ | |
3fa8871b | 8477 | TYPE_VALUES (enumtype) = NULL_TREE; |
51e29401 RS |
8478 | } |
8479 | ||
7114359f TT |
8480 | the_enum->enum_next_value = integer_zero_node; |
8481 | the_enum->enum_overflow = 0; | |
51e29401 | 8482 | |
02eb6e90 | 8483 | if (flag_short_enums) |
8cbababc JH |
8484 | for (tree v = TYPE_MAIN_VARIANT (enumtype); v; v = TYPE_NEXT_VARIANT (v)) |
8485 | TYPE_PACKED (v) = 1; | |
02eb6e90 | 8486 | |
24b97832 ILT |
8487 | /* FIXME: This will issue a warning for a use of a type defined |
8488 | within sizeof in a statement expr. This is not terribly serious | |
8489 | as C++ doesn't permit statement exprs within sizeof anyhow. */ | |
8490 | if (warn_cxx_compat && (in_sizeof || in_typeof || in_alignof)) | |
8491 | warning_at (loc, OPT_Wc___compat, | |
8492 | "defining type in %qs expression is invalid in C++", | |
8493 | (in_sizeof | |
8494 | ? "sizeof" | |
8495 | : (in_typeof ? "typeof" : "alignof"))); | |
8496 | ||
51e29401 RS |
8497 | return enumtype; |
8498 | } | |
8499 | ||
8500 | /* After processing and defining all the values of an enumeration type, | |
8501 | install their decls in the enumeration type and finish it off. | |
10861e9a RK |
8502 | ENUMTYPE is the type object, VALUES a list of decl-value pairs, |
8503 | and ATTRIBUTES are the specified attributes. | |
51e29401 RS |
8504 | Returns ENUMTYPE. */ |
8505 | ||
8506 | tree | |
35b1a6fa | 8507 | finish_enum (tree enumtype, tree values, tree attributes) |
51e29401 | 8508 | { |
b3694847 | 8509 | tree pair, tem; |
3fa8871b | 8510 | tree minnode = NULL_TREE, maxnode = NULL_TREE; |
807e902e KZ |
8511 | int precision; |
8512 | signop sign; | |
f75fbaf7 | 8513 | bool toplevel = (file_scope == current_scope); |
6de9cd9a | 8514 | struct lang_type *lt; |
51e29401 | 8515 | |
91d231cb | 8516 | decl_attributes (&enumtype, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE); |
10861e9a | 8517 | |
51e29401 RS |
8518 | /* Calculate the maximum value of any enumerator in this type. */ |
8519 | ||
59116212 RK |
8520 | if (values == error_mark_node) |
8521 | minnode = maxnode = integer_zero_node; | |
8522 | else | |
f500253d | 8523 | { |
cb3ca04e ZW |
8524 | minnode = maxnode = TREE_VALUE (values); |
8525 | for (pair = TREE_CHAIN (values); pair; pair = TREE_CHAIN (pair)) | |
f500253d | 8526 | { |
cb3ca04e ZW |
8527 | tree value = TREE_VALUE (pair); |
8528 | if (tree_int_cst_lt (maxnode, value)) | |
8529 | maxnode = value; | |
8530 | if (tree_int_cst_lt (value, minnode)) | |
8531 | minnode = value; | |
f500253d | 8532 | } |
cb3ca04e | 8533 | } |
f500253d | 8534 | |
cb3ca04e ZW |
8535 | /* Construct the final type of this enumeration. It is the same |
8536 | as one of the integral types - the narrowest one that fits, except | |
8537 | that normally we only go as narrow as int - and signed iff any of | |
8538 | the values are negative. */ | |
807e902e KZ |
8539 | sign = (tree_int_cst_sgn (minnode) >= 0) ? UNSIGNED : SIGNED; |
8540 | precision = MAX (tree_int_cst_min_precision (minnode, sign), | |
8541 | tree_int_cst_min_precision (maxnode, sign)); | |
ec8465a5 | 8542 | |
1066e9b5 JJ |
8543 | /* If the precision of the type was specified with an attribute and it |
8544 | was too small, give an error. Otherwise, use it. */ | |
8545 | if (TYPE_PRECISION (enumtype) && lookup_attribute ("mode", attributes)) | |
8546 | { | |
8547 | if (precision > TYPE_PRECISION (enumtype)) | |
8548 | { | |
8549 | TYPE_PRECISION (enumtype) = 0; | |
8550 | error ("specified mode too small for enumeral values"); | |
8551 | } | |
8552 | else | |
8553 | precision = TYPE_PRECISION (enumtype); | |
8554 | } | |
8555 | else | |
8556 | TYPE_PRECISION (enumtype) = 0; | |
8557 | ||
8558 | if (TYPE_PACKED (enumtype) | |
8559 | || precision > TYPE_PRECISION (integer_type_node) | |
8560 | || TYPE_PRECISION (enumtype)) | |
cb3ca04e | 8561 | { |
807e902e | 8562 | tem = c_common_type_for_size (precision, sign == UNSIGNED ? 1 : 0); |
6de9cd9a | 8563 | if (tem == NULL) |
1ada4cd0 | 8564 | { |
d4ee4d25 | 8565 | warning (0, "enumeration values exceed range of largest integer"); |
6de9cd9a | 8566 | tem = long_long_integer_type_node; |
1ada4cd0 | 8567 | } |
f500253d | 8568 | } |
1ada4cd0 | 8569 | else |
807e902e | 8570 | tem = sign == UNSIGNED ? unsigned_type_node : integer_type_node; |
736f85c7 | 8571 | |
6de9cd9a DN |
8572 | TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (tem); |
8573 | TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (tem); | |
6de9cd9a | 8574 | TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (tem); |
fe37c7af | 8575 | SET_TYPE_ALIGN (enumtype, TYPE_ALIGN (tem)); |
3fa8871b | 8576 | TYPE_SIZE (enumtype) = NULL_TREE; |
1066e9b5 | 8577 | TYPE_PRECISION (enumtype) = TYPE_PRECISION (tem); |
ec8465a5 | 8578 | |
51e29401 RS |
8579 | layout_type (enumtype); |
8580 | ||
59116212 | 8581 | if (values != error_mark_node) |
75b46437 | 8582 | { |
cb3ca04e ZW |
8583 | /* Change the type of the enumerators to be the enum type. We |
8584 | need to do this irrespective of the size of the enum, for | |
8585 | proper type checking. Replace the DECL_INITIALs of the | |
8586 | enumerators, and the value slots of the list, with copies | |
8587 | that have the enum type; they cannot be modified in place | |
8588 | because they may be shared (e.g. integer_zero_node) Finally, | |
8589 | change the purpose slots to point to the names of the decls. */ | |
59116212 RK |
8590 | for (pair = values; pair; pair = TREE_CHAIN (pair)) |
8591 | { | |
cb3ca04e | 8592 | tree enu = TREE_PURPOSE (pair); |
6de9cd9a | 8593 | tree ini = DECL_INITIAL (enu); |
51e29401 | 8594 | |
cb3ca04e | 8595 | TREE_TYPE (enu) = enumtype; |
736f85c7 AO |
8596 | |
8597 | /* The ISO C Standard mandates enumerators to have type int, | |
8598 | even though the underlying type of an enum type is | |
85790e66 | 8599 | unspecified. However, GCC allows enumerators of any |
a7e72022 MLI |
8600 | integer type as an extensions. build_enumerator() |
8601 | converts any enumerators that fit in an int to type int, | |
8602 | to avoid promotions to unsigned types when comparing | |
8603 | integers with enumerators that fit in the int range. | |
8604 | When -pedantic is given, build_enumerator() would have | |
8605 | already warned about those that don't fit. Here we | |
8606 | convert the rest to the enumerator type. */ | |
8607 | if (TREE_TYPE (ini) != integer_type_node) | |
8608 | ini = convert (enumtype, ini); | |
cb3ca04e | 8609 | |
6de9cd9a | 8610 | DECL_INITIAL (enu) = ini; |
cb3ca04e | 8611 | TREE_PURPOSE (pair) = DECL_NAME (enu); |
6de9cd9a | 8612 | TREE_VALUE (pair) = ini; |
cb3ca04e | 8613 | } |
51e29401 | 8614 | |
59116212 RK |
8615 | TYPE_VALUES (enumtype) = values; |
8616 | } | |
51e29401 | 8617 | |
6de9cd9a DN |
8618 | /* Record the min/max values so that we can warn about bit-field |
8619 | enumerations that are too small for the values. */ | |
766090c2 | 8620 | lt = ggc_cleared_alloc<struct lang_type> (); |
6de9cd9a DN |
8621 | lt->enum_min = minnode; |
8622 | lt->enum_max = maxnode; | |
8623 | TYPE_LANG_SPECIFIC (enumtype) = lt; | |
8624 | ||
fbe23ee7 RS |
8625 | /* Fix up all variant types of this enum type. */ |
8626 | for (tem = TYPE_MAIN_VARIANT (enumtype); tem; tem = TYPE_NEXT_VARIANT (tem)) | |
8627 | { | |
cb3ca04e ZW |
8628 | if (tem == enumtype) |
8629 | continue; | |
fbe23ee7 RS |
8630 | TYPE_VALUES (tem) = TYPE_VALUES (enumtype); |
8631 | TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype); | |
8632 | TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype); | |
8633 | TYPE_SIZE (tem) = TYPE_SIZE (enumtype); | |
def9b006 | 8634 | TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype); |
179d2f74 | 8635 | SET_TYPE_MODE (tem, TYPE_MODE (enumtype)); |
fbe23ee7 | 8636 | TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype); |
fe37c7af | 8637 | SET_TYPE_ALIGN (tem, TYPE_ALIGN (enumtype)); |
11cf4d18 | 8638 | TYPE_USER_ALIGN (tem) = TYPE_USER_ALIGN (enumtype); |
8df83eae | 8639 | TYPE_UNSIGNED (tem) = TYPE_UNSIGNED (enumtype); |
6de9cd9a | 8640 | TYPE_LANG_SPECIFIC (tem) = TYPE_LANG_SPECIFIC (enumtype); |
fbe23ee7 RS |
8641 | } |
8642 | ||
51e29401 RS |
8643 | /* Finish debugging output for this type. */ |
8644 | rest_of_type_compilation (enumtype, toplevel); | |
8645 | ||
24b97832 | 8646 | /* If this enum is defined inside a struct, add it to |
dc491a25 ILT |
8647 | struct_types. */ |
8648 | if (warn_cxx_compat | |
8649 | && struct_parse_info != NULL | |
8650 | && !in_sizeof && !in_typeof && !in_alignof) | |
9771b263 | 8651 | struct_parse_info->struct_types.safe_push (enumtype); |
24b97832 | 8652 | |
51e29401 RS |
8653 | return enumtype; |
8654 | } | |
8655 | ||
8656 | /* Build and install a CONST_DECL for one value of the | |
8657 | current enumeration type (one that was begun with start_enum). | |
7370e0da AC |
8658 | DECL_LOC is the location of the enumerator. |
8659 | LOC is the location of the '=' operator if any, DECL_LOC otherwise. | |
51e29401 RS |
8660 | Return a tree-list containing the CONST_DECL and its value. |
8661 | Assignment of sequential values by default is handled here. */ | |
8662 | ||
8663 | tree | |
7370e0da | 8664 | build_enumerator (location_t decl_loc, location_t loc, |
c2255bc4 | 8665 | struct c_enum_contents *the_enum, tree name, tree value) |
51e29401 | 8666 | { |
b3694847 | 8667 | tree decl, type; |
51e29401 RS |
8668 | |
8669 | /* Validate and default VALUE. */ | |
8670 | ||
3fa8871b | 8671 | if (value != NULL_TREE) |
e681c5a1 | 8672 | { |
f75fbaf7 ZW |
8673 | /* Don't issue more errors for error_mark_node (i.e. an |
8674 | undeclared identifier) - just ignore the value expression. */ | |
8675 | if (value == error_mark_node) | |
3fa8871b | 8676 | value = NULL_TREE; |
6895bac8 | 8677 | else if (!INTEGRAL_TYPE_P (TREE_TYPE (value))) |
25a1019f | 8678 | { |
c2255bc4 AH |
8679 | error_at (loc, "enumerator value for %qE is not an integer constant", |
8680 | name); | |
3fa8871b | 8681 | value = NULL_TREE; |
25a1019f | 8682 | } |
e681c5a1 RS |
8683 | else |
8684 | { | |
6895bac8 JM |
8685 | if (TREE_CODE (value) != INTEGER_CST) |
8686 | { | |
8687 | value = c_fully_fold (value, false, NULL); | |
8688 | if (TREE_CODE (value) == INTEGER_CST) | |
c1771a20 | 8689 | pedwarn (loc, OPT_Wpedantic, |
6895bac8 JM |
8690 | "enumerator value for %qE is not an integer " |
8691 | "constant expression", name); | |
8692 | } | |
8693 | if (TREE_CODE (value) != INTEGER_CST) | |
8694 | { | |
8695 | error ("enumerator value for %qE is not an integer constant", | |
8696 | name); | |
3fa8871b | 8697 | value = NULL_TREE; |
6895bac8 JM |
8698 | } |
8699 | else | |
8700 | { | |
8701 | value = default_conversion (value); | |
8702 | constant_expression_warning (value); | |
8703 | } | |
e681c5a1 RS |
8704 | } |
8705 | } | |
51e29401 RS |
8706 | |
8707 | /* Default based on previous value. */ | |
8708 | /* It should no longer be possible to have NON_LVALUE_EXPR | |
8709 | in the default. */ | |
3fa8871b | 8710 | if (value == NULL_TREE) |
93e3ba4f | 8711 | { |
7114359f TT |
8712 | value = the_enum->enum_next_value; |
8713 | if (the_enum->enum_overflow) | |
c2255bc4 | 8714 | error_at (loc, "overflow in enumeration values"); |
93e3ba4f | 8715 | } |
85790e66 MLI |
8716 | /* Even though the underlying type of an enum is unspecified, the |
8717 | type of enumeration constants is explicitly defined as int | |
8718 | (6.4.4.3/2 in the C99 Standard). GCC allows any integer type as | |
8719 | an extension. */ | |
8720 | else if (!int_fits_type_p (value, integer_type_node)) | |
c1771a20 | 8721 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 8722 | "ISO C restricts enumerator values to range of %<int%>"); |
51e29401 | 8723 | |
a7e72022 MLI |
8724 | /* The ISO C Standard mandates enumerators to have type int, even |
8725 | though the underlying type of an enum type is unspecified. | |
8726 | However, GCC allows enumerators of any integer type as an | |
8727 | extensions. Here we convert any enumerators that fit in an int | |
8728 | to type int, to avoid promotions to unsigned types when comparing | |
8729 | integers with enumerators that fit in the int range. When | |
8730 | -pedantic is given, we would have already warned about those that | |
8731 | don't fit. We have to do this here rather than in finish_enum | |
8732 | because this value may be used to define more enumerators. */ | |
8733 | if (int_fits_type_p (value, integer_type_node)) | |
8734 | value = convert (integer_type_node, value); | |
8735 | ||
51e29401 | 8736 | /* Set basis for default for next value. */ |
ba47d38d | 8737 | the_enum->enum_next_value |
8400e75e | 8738 | = build_binary_op (EXPR_LOC_OR_LOC (value, input_location), |
30af3a2b | 8739 | PLUS_EXPR, value, integer_one_node, false); |
7114359f | 8740 | the_enum->enum_overflow = tree_int_cst_lt (the_enum->enum_next_value, value); |
51e29401 RS |
8741 | |
8742 | /* Now create a declaration for the enum value name. */ | |
8743 | ||
75b46437 | 8744 | type = TREE_TYPE (value); |
b0c48229 NB |
8745 | type = c_common_type_for_size (MAX (TYPE_PRECISION (type), |
8746 | TYPE_PRECISION (integer_type_node)), | |
8747 | (TYPE_PRECISION (type) | |
8748 | >= TYPE_PRECISION (integer_type_node) | |
8df83eae | 8749 | && TYPE_UNSIGNED (type))); |
75b46437 | 8750 | |
7370e0da | 8751 | decl = build_decl (decl_loc, CONST_DECL, name, type); |
0543d026 | 8752 | DECL_INITIAL (decl) = convert (type, value); |
51e29401 RS |
8753 | pushdecl (decl); |
8754 | ||
4dd7201e | 8755 | return tree_cons (decl, value, NULL_TREE); |
51e29401 | 8756 | } |
8f17b5c5 | 8757 | |
51e29401 RS |
8758 | \f |
8759 | /* Create the FUNCTION_DECL for a function definition. | |
f7a4cec0 | 8760 | DECLSPECS, DECLARATOR and ATTRIBUTES are the parts of |
5730cf69 | 8761 | the declaration; they describe the function's name and the type it returns, |
51e29401 RS |
8762 | but twisted together in a fashion that parallels the syntax of C. |
8763 | ||
8764 | This function creates a binding context for the function body | |
8765 | as well as setting up the FUNCTION_DECL in current_function_decl. | |
8766 | ||
e3455240 MP |
8767 | Returns true on success. If the DECLARATOR is not suitable for a function |
8768 | (it defines a datum instead), we return false to report a parse error. */ | |
51e29401 | 8769 | |
e3455240 | 8770 | bool |
deb176fa | 8771 | start_function (struct c_declspecs *declspecs, struct c_declarator *declarator, |
f8893e47 | 8772 | tree attributes) |
51e29401 RS |
8773 | { |
8774 | tree decl1, old_decl; | |
b785f485 | 8775 | tree restype, resdecl; |
c2255bc4 | 8776 | location_t loc; |
51e29401 | 8777 | |
0f41302f | 8778 | current_function_returns_value = 0; /* Assume, until we see it does. */ |
51e29401 | 8779 | current_function_returns_null = 0; |
5ce89b2e | 8780 | current_function_returns_abnormally = 0; |
51e29401 | 8781 | warn_about_return_type = 0; |
506e2710 RH |
8782 | c_switch_stack = NULL; |
8783 | ||
8784 | /* Indicate no valid break/continue context by setting these variables | |
8785 | to some non-null, non-label value. We'll notice and emit the proper | |
8786 | error message in c_finish_bc_stmt. */ | |
8787 | c_break_label = c_cont_label = size_zero_node; | |
51e29401 | 8788 | |
0da300cd | 8789 | decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, true, NULL, |
928c19bb | 8790 | &attributes, NULL, NULL, DEPRECATED_NORMAL); |
ea5b45b6 | 8791 | invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION, decl1); |
51e29401 RS |
8792 | |
8793 | /* If the declarator is not suitable for a function definition, | |
8794 | cause a syntax error. */ | |
3fa8871b | 8795 | if (decl1 == NULL_TREE |
560ad308 | 8796 | || TREE_CODE (decl1) != FUNCTION_DECL) |
e3455240 | 8797 | return false; |
51e29401 | 8798 | |
c2255bc4 AH |
8799 | loc = DECL_SOURCE_LOCATION (decl1); |
8800 | ||
acf0174b | 8801 | c_decl_attributes (&decl1, attributes, 0); |
7665dfd4 | 8802 | |
9162542e AO |
8803 | if (DECL_DECLARED_INLINE_P (decl1) |
8804 | && DECL_UNINLINABLE (decl1) | |
8805 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl1))) | |
c2255bc4 AH |
8806 | warning_at (loc, OPT_Wattributes, |
8807 | "inline function %qD given attribute noinline", | |
8808 | decl1); | |
9162542e | 8809 | |
4eb7fd83 JJ |
8810 | /* Handle gnu_inline attribute. */ |
8811 | if (declspecs->inline_p | |
da1c7394 | 8812 | && !flag_gnu89_inline |
4eb7fd83 | 8813 | && TREE_CODE (decl1) == FUNCTION_DECL |
6cf59865 JJ |
8814 | && (lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (decl1)) |
8815 | || current_function_decl)) | |
4eb7fd83 JJ |
8816 | { |
8817 | if (declspecs->storage_class != csc_static) | |
8818 | DECL_EXTERNAL (decl1) = !DECL_EXTERNAL (decl1); | |
8819 | } | |
4eb7fd83 | 8820 | |
51e29401 RS |
8821 | announce_function (decl1); |
8822 | ||
d0f062fb | 8823 | if (!COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (TREE_TYPE (decl1)))) |
51e29401 | 8824 | { |
c2255bc4 | 8825 | error_at (loc, "return type is an incomplete type"); |
51e29401 RS |
8826 | /* Make it return void instead. */ |
8827 | TREE_TYPE (decl1) | |
8828 | = build_function_type (void_type_node, | |
8829 | TYPE_ARG_TYPES (TREE_TYPE (decl1))); | |
8830 | } | |
8831 | ||
8832 | if (warn_about_return_type) | |
92574c7c | 8833 | warn_defaults_to (loc, flag_isoc99 ? OPT_Wimplicit_int |
b67b9225 | 8834 | : (warn_return_type > 0 ? OPT_Wreturn_type |
35aff4fb MP |
8835 | : OPT_Wimplicit_int), |
8836 | "return type defaults to %<int%>"); | |
51e29401 | 8837 | |
51e29401 | 8838 | /* Make the init_value nonzero so pushdecl knows this is not tentative. |
f75fbaf7 | 8839 | error_mark_node is replaced below (in pop_scope) with the BLOCK. */ |
51e29401 RS |
8840 | DECL_INITIAL (decl1) = error_mark_node; |
8841 | ||
c4712597 | 8842 | /* A nested function is not global. */ |
3fa8871b | 8843 | if (current_function_decl != NULL_TREE) |
c4712597 SZ |
8844 | TREE_PUBLIC (decl1) = 0; |
8845 | ||
51e29401 | 8846 | /* If this definition isn't a prototype and we had a prototype declaration |
46097c76 | 8847 | before, copy the arg type info from that prototype. */ |
f75fbaf7 | 8848 | old_decl = lookup_name_in_scope (DECL_NAME (decl1), current_scope); |
d8890adf | 8849 | if (old_decl && TREE_CODE (old_decl) != FUNCTION_DECL) |
3fa8871b | 8850 | old_decl = NULL_TREE; |
6fb58bba JM |
8851 | current_function_prototype_locus = UNKNOWN_LOCATION; |
8852 | current_function_prototype_built_in = false; | |
8853 | current_function_prototype_arg_types = NULL_TREE; | |
f4da8dce | 8854 | if (!prototype_p (TREE_TYPE (decl1))) |
6fb58bba | 8855 | { |
3fa8871b MP |
8856 | if (old_decl != NULL_TREE |
8857 | && TREE_CODE (TREE_TYPE (old_decl)) == FUNCTION_TYPE | |
6fb58bba JM |
8858 | && comptypes (TREE_TYPE (TREE_TYPE (decl1)), |
8859 | TREE_TYPE (TREE_TYPE (old_decl)))) | |
8860 | { | |
e9122ef6 MP |
8861 | if (stdarg_p (TREE_TYPE (old_decl))) |
8862 | { | |
097f82ec | 8863 | auto_diagnostic_group d; |
e9122ef6 MP |
8864 | warning_at (loc, 0, "%q+D defined as variadic function " |
8865 | "without prototype", decl1); | |
8866 | locate_old_decl (old_decl); | |
8867 | } | |
6fb58bba JM |
8868 | TREE_TYPE (decl1) = composite_type (TREE_TYPE (old_decl), |
8869 | TREE_TYPE (decl1)); | |
8870 | current_function_prototype_locus = DECL_SOURCE_LOCATION (old_decl); | |
8871 | current_function_prototype_built_in | |
8872 | = C_DECL_BUILTIN_PROTOTYPE (old_decl); | |
8873 | current_function_prototype_arg_types | |
8874 | = TYPE_ARG_TYPES (TREE_TYPE (decl1)); | |
8875 | } | |
8876 | if (TREE_PUBLIC (decl1)) | |
8877 | { | |
8878 | /* If there is an external prototype declaration of this | |
8879 | function, record its location but do not copy information | |
8880 | to this decl. This may be an invisible declaration | |
8881 | (built-in or in a scope which has finished) or simply | |
8882 | have more refined argument types than any declaration | |
8883 | found above. */ | |
8884 | struct c_binding *b; | |
8885 | for (b = I_SYMBOL_BINDING (DECL_NAME (decl1)); b; b = b->shadowed) | |
8886 | if (B_IN_SCOPE (b, external_scope)) | |
8887 | break; | |
8888 | if (b) | |
8889 | { | |
8890 | tree ext_decl, ext_type; | |
8891 | ext_decl = b->decl; | |
e1b7793c | 8892 | ext_type = b->u.type ? b->u.type : TREE_TYPE (ext_decl); |
6fb58bba JM |
8893 | if (TREE_CODE (ext_type) == FUNCTION_TYPE |
8894 | && comptypes (TREE_TYPE (TREE_TYPE (decl1)), | |
8895 | TREE_TYPE (ext_type))) | |
8896 | { | |
8897 | current_function_prototype_locus | |
8898 | = DECL_SOURCE_LOCATION (ext_decl); | |
8899 | current_function_prototype_built_in | |
8900 | = C_DECL_BUILTIN_PROTOTYPE (ext_decl); | |
8901 | current_function_prototype_arg_types | |
8902 | = TYPE_ARG_TYPES (ext_type); | |
8903 | } | |
8904 | } | |
8905 | } | |
50a9145c | 8906 | } |
51e29401 RS |
8907 | |
8908 | /* Optionally warn of old-fashioned def with no previous prototype. */ | |
8909 | if (warn_strict_prototypes | |
1e55c0e2 | 8910 | && old_decl != error_mark_node |
f4da8dce | 8911 | && !prototype_p (TREE_TYPE (decl1)) |
339a28b9 | 8912 | && C_DECL_ISNT_PROTOTYPE (old_decl)) |
c2255bc4 AH |
8913 | warning_at (loc, OPT_Wstrict_prototypes, |
8914 | "function declaration isn%'t a prototype"); | |
51e29401 RS |
8915 | /* Optionally warn of any global def with no previous prototype. */ |
8916 | else if (warn_missing_prototypes | |
1e55c0e2 | 8917 | && old_decl != error_mark_node |
51e29401 | 8918 | && TREE_PUBLIC (decl1) |
3f75a254 | 8919 | && !MAIN_NAME_P (DECL_NAME (decl1)) |
edd28054 MP |
8920 | && C_DECL_ISNT_PROTOTYPE (old_decl) |
8921 | && !DECL_DECLARED_INLINE_P (decl1)) | |
c2255bc4 AH |
8922 | warning_at (loc, OPT_Wmissing_prototypes, |
8923 | "no previous prototype for %qD", decl1); | |
51e29401 RS |
8924 | /* Optionally warn of any def with no previous prototype |
8925 | if the function has already been used. */ | |
8926 | else if (warn_missing_prototypes | |
3fa8871b | 8927 | && old_decl != NULL_TREE |
1e55c0e2 JM |
8928 | && old_decl != error_mark_node |
8929 | && TREE_USED (old_decl) | |
f4da8dce | 8930 | && !prototype_p (TREE_TYPE (old_decl))) |
c2255bc4 AH |
8931 | warning_at (loc, OPT_Wmissing_prototypes, |
8932 | "%qD was used with no prototype before its definition", decl1); | |
1474fe46 RK |
8933 | /* Optionally warn of any global def with no previous declaration. */ |
8934 | else if (warn_missing_declarations | |
8935 | && TREE_PUBLIC (decl1) | |
3fa8871b | 8936 | && old_decl == NULL_TREE |
b286be94 MP |
8937 | && !MAIN_NAME_P (DECL_NAME (decl1)) |
8938 | && !DECL_DECLARED_INLINE_P (decl1)) | |
c2255bc4 AH |
8939 | warning_at (loc, OPT_Wmissing_declarations, |
8940 | "no previous declaration for %qD", | |
8941 | decl1); | |
1474fe46 RK |
8942 | /* Optionally warn of any def with no previous declaration |
8943 | if the function has already been used. */ | |
8944 | else if (warn_missing_declarations | |
3fa8871b | 8945 | && old_decl != NULL_TREE |
1e55c0e2 JM |
8946 | && old_decl != error_mark_node |
8947 | && TREE_USED (old_decl) | |
339a28b9 | 8948 | && C_DECL_IMPLICIT (old_decl)) |
c2255bc4 AH |
8949 | warning_at (loc, OPT_Wmissing_declarations, |
8950 | "%qD was used with no declaration before its definition", decl1); | |
51e29401 | 8951 | |
51e29401 RS |
8952 | /* This function exists in static storage. |
8953 | (This does not mean `static' in the C sense!) */ | |
8954 | TREE_STATIC (decl1) = 1; | |
8955 | ||
d05cc98e GK |
8956 | /* This is the earliest point at which we might know the assembler |
8957 | name of the function. Thus, if it's set before this, die horribly. */ | |
366de0ce | 8958 | gcc_assert (!DECL_ASSEMBLER_NAME_SET_P (decl1)); |
d05cc98e GK |
8959 | |
8960 | /* If #pragma weak was used, mark the decl weak now. */ | |
f75fbaf7 | 8961 | if (current_scope == file_scope) |
d05cc98e GK |
8962 | maybe_apply_pragma_weak (decl1); |
8963 | ||
6645c3fa | 8964 | /* Warn for unlikely, improbable, or stupid declarations of `main'. */ |
4003301d | 8965 | if (warn_main && MAIN_NAME_P (DECL_NAME (decl1))) |
b8705e61 | 8966 | { |
b8705e61 | 8967 | if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (decl1))) |
6645c3fa | 8968 | != integer_type_node) |
c2255bc4 | 8969 | pedwarn (loc, OPT_Wmain, "return type of %qD is not %<int%>", decl1); |
f827930a MP |
8970 | else if (TYPE_ATOMIC (TREE_TYPE (TREE_TYPE (decl1)))) |
8971 | pedwarn (loc, OPT_Wmain, "%<_Atomic%>-qualified return type of %qD", | |
8972 | decl1); | |
b8705e61 | 8973 | |
4003301d | 8974 | check_main_parameter_types (decl1); |
b8705e61 | 8975 | |
3f75a254 | 8976 | if (!TREE_PUBLIC (decl1)) |
c2255bc4 AH |
8977 | pedwarn (loc, OPT_Wmain, |
8978 | "%qD is normally a non-static function", decl1); | |
b8705e61 RK |
8979 | } |
8980 | ||
51e29401 RS |
8981 | /* Record the decl so that the function name is defined. |
8982 | If we already have a decl for this name, and it is a FUNCTION_DECL, | |
8983 | use the old decl. */ | |
8984 | ||
8985 | current_function_decl = pushdecl (decl1); | |
8986 | ||
f75fbaf7 | 8987 | push_scope (); |
eb1dfbb2 | 8988 | declare_parm_level (); |
51e29401 | 8989 | |
51e29401 | 8990 | restype = TREE_TYPE (TREE_TYPE (current_function_decl)); |
c2255bc4 | 8991 | resdecl = build_decl (loc, RESULT_DECL, NULL_TREE, restype); |
b785f485 RH |
8992 | DECL_ARTIFICIAL (resdecl) = 1; |
8993 | DECL_IGNORED_P (resdecl) = 1; | |
8994 | DECL_RESULT (current_function_decl) = resdecl; | |
51e29401 | 8995 | |
0ba8a114 | 8996 | start_fname_decls (); |
35b1a6fa | 8997 | |
e3455240 | 8998 | return true; |
51e29401 | 8999 | } |
51e29401 | 9000 | \f |
66db6b62 ZW |
9001 | /* Subroutine of store_parm_decls which handles new-style function |
9002 | definitions (prototype format). The parms already have decls, so we | |
9003 | need only record them as in effect and complain if any redundant | |
9004 | old-style parm decls were written. */ | |
d4e43dff | 9005 | static void |
f8893e47 | 9006 | store_parm_decls_newstyle (tree fndecl, const struct c_arg_info *arg_info) |
51e29401 | 9007 | { |
f75fbaf7 | 9008 | tree decl; |
e60bf9d4 NF |
9009 | c_arg_tag *tag; |
9010 | unsigned ix; | |
51e29401 | 9011 | |
f75fbaf7 | 9012 | if (current_scope->bindings) |
66db6b62 | 9013 | { |
c5d75364 MLI |
9014 | error_at (DECL_SOURCE_LOCATION (fndecl), |
9015 | "old-style parameter declarations in prototyped " | |
9016 | "function definition"); | |
51e29401 | 9017 | |
66db6b62 | 9018 | /* Get rid of the old-style declarations. */ |
f75fbaf7 ZW |
9019 | pop_scope (); |
9020 | push_scope (); | |
9021 | } | |
9022 | /* Don't issue this warning for nested functions, and don't issue this | |
9023 | warning if we got here because ARG_INFO_TYPES was error_mark_node | |
9024 | (this happens when a function definition has just an ellipsis in | |
9025 | its parameter list). */ | |
8400e75e DM |
9026 | else if (!in_system_header_at (input_location) |
9027 | && !current_function_scope | |
f8893e47 | 9028 | && arg_info->types != error_mark_node) |
c5d75364 MLI |
9029 | warning_at (DECL_SOURCE_LOCATION (fndecl), OPT_Wtraditional, |
9030 | "traditional C rejects ISO C style function definitions"); | |
51e29401 | 9031 | |
55d54003 ZW |
9032 | /* Now make all the parameter declarations visible in the function body. |
9033 | We can bypass most of the grunt work of pushdecl. */ | |
910ad8de | 9034 | for (decl = arg_info->parms; decl; decl = DECL_CHAIN (decl)) |
66db6b62 | 9035 | { |
55d54003 | 9036 | DECL_CONTEXT (decl) = current_function_decl; |
f75fbaf7 | 9037 | if (DECL_NAME (decl)) |
7c47d6e9 JM |
9038 | { |
9039 | bind (DECL_NAME (decl), decl, current_scope, | |
b3f27c15 JJ |
9040 | /*invisible=*/false, /*nested=*/false, |
9041 | UNKNOWN_LOCATION); | |
7c47d6e9 JM |
9042 | if (!TREE_USED (decl)) |
9043 | warn_if_shadowing (decl); | |
9044 | } | |
66db6b62 | 9045 | else |
c5d75364 | 9046 | error_at (DECL_SOURCE_LOCATION (decl), "parameter name omitted"); |
66db6b62 | 9047 | } |
26f943fd | 9048 | |
66db6b62 | 9049 | /* Record the parameter list in the function declaration. */ |
f8893e47 | 9050 | DECL_ARGUMENTS (fndecl) = arg_info->parms; |
51e29401 | 9051 | |
66db6b62 | 9052 | /* Now make all the ancillary declarations visible, likewise. */ |
910ad8de | 9053 | for (decl = arg_info->others; decl; decl = DECL_CHAIN (decl)) |
55d54003 ZW |
9054 | { |
9055 | DECL_CONTEXT (decl) = current_function_decl; | |
f75fbaf7 | 9056 | if (DECL_NAME (decl)) |
9aaabf8a | 9057 | bind (DECL_NAME (decl), decl, current_scope, |
10e76c1a JM |
9058 | /*invisible=*/false, |
9059 | /*nested=*/(TREE_CODE (decl) == FUNCTION_DECL), | |
9060 | UNKNOWN_LOCATION); | |
55d54003 | 9061 | } |
26f943fd | 9062 | |
66db6b62 | 9063 | /* And all the tag declarations. */ |
9771b263 | 9064 | FOR_EACH_VEC_SAFE_ELT_REVERSE (arg_info->tags, ix, tag) |
e60bf9d4 NF |
9065 | if (tag->id) |
9066 | bind (tag->id, tag->type, current_scope, | |
b3f27c15 | 9067 | /*invisible=*/false, /*nested=*/false, UNKNOWN_LOCATION); |
66db6b62 | 9068 | } |
1f731749 | 9069 | |
66db6b62 ZW |
9070 | /* Subroutine of store_parm_decls which handles old-style function |
9071 | definitions (separate parameter list and declarations). */ | |
51e29401 | 9072 | |
66db6b62 | 9073 | static void |
f8893e47 | 9074 | store_parm_decls_oldstyle (tree fndecl, const struct c_arg_info *arg_info) |
66db6b62 | 9075 | { |
f75fbaf7 | 9076 | struct c_binding *b; |
55d54003 | 9077 | tree parm, decl, last; |
f8893e47 | 9078 | tree parmids = arg_info->parms; |
6e2830c3 | 9079 | hash_set<tree> seen_args; |
66db6b62 | 9080 | |
8400e75e | 9081 | if (!in_system_header_at (input_location)) |
c2255bc4 AH |
9082 | warning_at (DECL_SOURCE_LOCATION (fndecl), |
9083 | OPT_Wold_style_definition, "old-style function definition"); | |
f75fbaf7 | 9084 | |
66db6b62 ZW |
9085 | /* Match each formal parameter name with its declaration. Save each |
9086 | decl in the appropriate TREE_PURPOSE slot of the parmids chain. */ | |
9087 | for (parm = parmids; parm; parm = TREE_CHAIN (parm)) | |
9088 | { | |
3fa8871b | 9089 | if (TREE_VALUE (parm) == NULL_TREE) |
7a0347ff | 9090 | { |
c2255bc4 AH |
9091 | error_at (DECL_SOURCE_LOCATION (fndecl), |
9092 | "parameter name missing from parameter list"); | |
3fa8871b | 9093 | TREE_PURPOSE (parm) = NULL_TREE; |
66db6b62 | 9094 | continue; |
7a0347ff | 9095 | } |
51e29401 | 9096 | |
f75fbaf7 | 9097 | b = I_SYMBOL_BINDING (TREE_VALUE (parm)); |
9aaabf8a | 9098 | if (b && B_IN_CURRENT_SCOPE (b)) |
51e29401 | 9099 | { |
f75fbaf7 | 9100 | decl = b->decl; |
c58e98c8 SM |
9101 | /* Skip erroneous parameters. */ |
9102 | if (decl == error_mark_node) | |
9103 | continue; | |
66db6b62 ZW |
9104 | /* If we got something other than a PARM_DECL it is an error. */ |
9105 | if (TREE_CODE (decl) != PARM_DECL) | |
a23faf7a MP |
9106 | { |
9107 | error_at (DECL_SOURCE_LOCATION (decl), | |
9108 | "%qD declared as a non-parameter", decl); | |
9109 | continue; | |
9110 | } | |
66db6b62 ZW |
9111 | /* If the declaration is already marked, we have a duplicate |
9112 | name. Complain and ignore the duplicate. */ | |
6e2830c3 | 9113 | else if (seen_args.contains (decl)) |
51e29401 | 9114 | { |
c2255bc4 AH |
9115 | error_at (DECL_SOURCE_LOCATION (decl), |
9116 | "multiple parameters named %qD", decl); | |
3fa8871b | 9117 | TREE_PURPOSE (parm) = NULL_TREE; |
66db6b62 | 9118 | continue; |
51e29401 | 9119 | } |
66db6b62 ZW |
9120 | /* If the declaration says "void", complain and turn it into |
9121 | an int. */ | |
9122 | else if (VOID_TYPE_P (TREE_TYPE (decl))) | |
51e29401 | 9123 | { |
c2255bc4 AH |
9124 | error_at (DECL_SOURCE_LOCATION (decl), |
9125 | "parameter %qD declared with void type", decl); | |
66db6b62 ZW |
9126 | TREE_TYPE (decl) = integer_type_node; |
9127 | DECL_ARG_TYPE (decl) = integer_type_node; | |
9128 | layout_decl (decl, 0); | |
51e29401 | 9129 | } |
7c47d6e9 | 9130 | warn_if_shadowing (decl); |
51e29401 | 9131 | } |
66db6b62 ZW |
9132 | /* If no declaration found, default to int. */ |
9133 | else | |
51e29401 | 9134 | { |
c2255bc4 AH |
9135 | /* FIXME diagnostics: This should be the location of the argument, |
9136 | not the FNDECL. E.g., for an old-style declaration | |
9137 | ||
9138 | int f10(v) { blah; } | |
9139 | ||
9140 | We should use the location of the V, not the F10. | |
9141 | Unfortunately, the V is an IDENTIFIER_NODE which has no | |
9142 | location. In the future we need locations for c_arg_info | |
9143 | entries. | |
9144 | ||
9145 | See gcc.dg/Wshadow-3.c for an example of this problem. */ | |
9146 | decl = build_decl (DECL_SOURCE_LOCATION (fndecl), | |
9147 | PARM_DECL, TREE_VALUE (parm), integer_type_node); | |
66db6b62 | 9148 | DECL_ARG_TYPE (decl) = TREE_TYPE (decl); |
66db6b62 | 9149 | pushdecl (decl); |
7c47d6e9 | 9150 | warn_if_shadowing (decl); |
66db6b62 ZW |
9151 | |
9152 | if (flag_isoc99) | |
c2255bc4 | 9153 | pedwarn (DECL_SOURCE_LOCATION (decl), |
92574c7c MP |
9154 | OPT_Wimplicit_int, "type of %qD defaults to %<int%>", |
9155 | decl); | |
b8698a0f | 9156 | else |
c2255bc4 AH |
9157 | warning_at (DECL_SOURCE_LOCATION (decl), |
9158 | OPT_Wmissing_parameter_type, | |
9159 | "type of %qD defaults to %<int%>", decl); | |
51e29401 RS |
9160 | } |
9161 | ||
66db6b62 | 9162 | TREE_PURPOSE (parm) = decl; |
6e2830c3 | 9163 | seen_args.add (decl); |
51e29401 | 9164 | } |
51e29401 | 9165 | |
55d54003 ZW |
9166 | /* Now examine the parms chain for incomplete declarations |
9167 | and declarations with no corresponding names. */ | |
51e29401 | 9168 | |
f75fbaf7 | 9169 | for (b = current_scope->bindings; b; b = b->prev) |
66db6b62 | 9170 | { |
f75fbaf7 ZW |
9171 | parm = b->decl; |
9172 | if (TREE_CODE (parm) != PARM_DECL) | |
9173 | continue; | |
9174 | ||
559f2da5 RH |
9175 | if (TREE_TYPE (parm) != error_mark_node |
9176 | && !COMPLETE_TYPE_P (TREE_TYPE (parm))) | |
51e29401 | 9177 | { |
c2255bc4 AH |
9178 | error_at (DECL_SOURCE_LOCATION (parm), |
9179 | "parameter %qD has incomplete type", parm); | |
66db6b62 ZW |
9180 | TREE_TYPE (parm) = error_mark_node; |
9181 | } | |
51e29401 | 9182 | |
6e2830c3 | 9183 | if (!seen_args.contains (parm)) |
66db6b62 | 9184 | { |
c2255bc4 AH |
9185 | error_at (DECL_SOURCE_LOCATION (parm), |
9186 | "declaration for parameter %qD but no such parameter", | |
9187 | parm); | |
51e29401 | 9188 | |
66db6b62 ZW |
9189 | /* Pretend the parameter was not missing. |
9190 | This gets us to a standard state and minimizes | |
9191 | further error messages. */ | |
9192 | parmids = chainon (parmids, tree_cons (parm, 0, 0)); | |
51e29401 | 9193 | } |
66db6b62 | 9194 | } |
51e29401 | 9195 | |
66db6b62 ZW |
9196 | /* Chain the declarations together in the order of the list of |
9197 | names. Store that chain in the function decl, replacing the | |
55d54003 | 9198 | list of names. Update the current scope to match. */ |
3fa8871b | 9199 | DECL_ARGUMENTS (fndecl) = NULL_TREE; |
66db6b62 | 9200 | |
55d54003 ZW |
9201 | for (parm = parmids; parm; parm = TREE_CHAIN (parm)) |
9202 | if (TREE_PURPOSE (parm)) | |
9203 | break; | |
9204 | if (parm && TREE_PURPOSE (parm)) | |
9205 | { | |
9206 | last = TREE_PURPOSE (parm); | |
9207 | DECL_ARGUMENTS (fndecl) = last; | |
55d54003 ZW |
9208 | |
9209 | for (parm = TREE_CHAIN (parm); parm; parm = TREE_CHAIN (parm)) | |
9210 | if (TREE_PURPOSE (parm)) | |
9211 | { | |
910ad8de | 9212 | DECL_CHAIN (last) = TREE_PURPOSE (parm); |
55d54003 | 9213 | last = TREE_PURPOSE (parm); |
55d54003 | 9214 | } |
3fa8871b | 9215 | DECL_CHAIN (last) = NULL_TREE; |
55d54003 | 9216 | } |
51e29401 | 9217 | |
66db6b62 ZW |
9218 | /* If there was a previous prototype, |
9219 | set the DECL_ARG_TYPE of each argument according to | |
9220 | the type previously specified, and report any mismatches. */ | |
51e29401 | 9221 | |
6fb58bba | 9222 | if (current_function_prototype_arg_types) |
66db6b62 ZW |
9223 | { |
9224 | tree type; | |
9225 | for (parm = DECL_ARGUMENTS (fndecl), | |
6fb58bba | 9226 | type = current_function_prototype_arg_types; |
7f5a7d78 MP |
9227 | parm || (type != NULL_TREE |
9228 | && TREE_VALUE (type) != error_mark_node | |
9229 | && TYPE_MAIN_VARIANT (TREE_VALUE (type)) != void_type_node); | |
910ad8de | 9230 | parm = DECL_CHAIN (parm), type = TREE_CHAIN (type)) |
51e29401 | 9231 | { |
7f5a7d78 MP |
9232 | if (parm == NULL_TREE |
9233 | || type == NULL_TREE | |
9234 | || (TREE_VALUE (type) != error_mark_node | |
9235 | && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node)) | |
51e29401 | 9236 | { |
6fb58bba | 9237 | if (current_function_prototype_built_in) |
c2255bc4 AH |
9238 | warning_at (DECL_SOURCE_LOCATION (fndecl), |
9239 | 0, "number of arguments doesn%'t match " | |
9240 | "built-in prototype"); | |
6fb58bba JM |
9241 | else |
9242 | { | |
c2255bc4 AH |
9243 | /* FIXME diagnostics: This should be the location of |
9244 | FNDECL, but there is bug when a prototype is | |
9245 | declared inside function context, but defined | |
9246 | outside of it (e.g., gcc.dg/pr15698-2.c). In | |
9247 | which case FNDECL gets the location of the | |
9248 | prototype, not the definition. */ | |
9249 | error_at (input_location, | |
9250 | "number of arguments doesn%'t match prototype"); | |
9251 | ||
9252 | error_at (current_function_prototype_locus, | |
9253 | "prototype declaration"); | |
6fb58bba | 9254 | } |
66db6b62 ZW |
9255 | break; |
9256 | } | |
9257 | /* Type for passing arg must be consistent with that | |
9258 | declared for the arg. ISO C says we take the unqualified | |
9259 | type for parameters declared with qualified type. */ | |
bb686a19 | 9260 | if (TREE_TYPE (parm) != error_mark_node |
7f5a7d78 | 9261 | && TREE_VALUE (type) != error_mark_node |
267bac10 JM |
9262 | && ((TYPE_ATOMIC (DECL_ARG_TYPE (parm)) |
9263 | != TYPE_ATOMIC (TREE_VALUE (type))) | |
9264 | || !comptypes (TYPE_MAIN_VARIANT (DECL_ARG_TYPE (parm)), | |
9265 | TYPE_MAIN_VARIANT (TREE_VALUE (type))))) | |
66db6b62 | 9266 | { |
267bac10 JM |
9267 | if ((TYPE_ATOMIC (DECL_ARG_TYPE (parm)) |
9268 | == TYPE_ATOMIC (TREE_VALUE (type))) | |
9269 | && (TYPE_MAIN_VARIANT (TREE_TYPE (parm)) | |
9270 | == TYPE_MAIN_VARIANT (TREE_VALUE (type)))) | |
51e29401 | 9271 | { |
66db6b62 ZW |
9272 | /* Adjust argument to match prototype. E.g. a previous |
9273 | `int foo(float);' prototype causes | |
9274 | `int foo(x) float x; {...}' to be treated like | |
9275 | `int foo(float x) {...}'. This is particularly | |
9276 | useful for argument types like uid_t. */ | |
9277 | DECL_ARG_TYPE (parm) = TREE_TYPE (parm); | |
9278 | ||
61f71b34 | 9279 | if (targetm.calls.promote_prototypes (TREE_TYPE (current_function_decl)) |
66db6b62 | 9280 | && INTEGRAL_TYPE_P (TREE_TYPE (parm)) |
7f5a7d78 MP |
9281 | && (TYPE_PRECISION (TREE_TYPE (parm)) |
9282 | < TYPE_PRECISION (integer_type_node))) | |
267bac10 JM |
9283 | DECL_ARG_TYPE (parm) |
9284 | = c_type_promotes_to (TREE_TYPE (parm)); | |
66db6b62 | 9285 | |
fcf73884 MLI |
9286 | /* ??? Is it possible to get here with a |
9287 | built-in prototype or will it always have | |
9288 | been diagnosed as conflicting with an | |
9289 | old-style definition and discarded? */ | |
9290 | if (current_function_prototype_built_in) | |
c2255bc4 | 9291 | warning_at (DECL_SOURCE_LOCATION (parm), |
c1771a20 | 9292 | OPT_Wpedantic, "promoted argument %qD " |
c2255bc4 | 9293 | "doesn%'t match built-in prototype", parm); |
fcf73884 | 9294 | else |
50a9145c | 9295 | { |
c2255bc4 | 9296 | pedwarn (DECL_SOURCE_LOCATION (parm), |
c1771a20 | 9297 | OPT_Wpedantic, "promoted argument %qD " |
fcf73884 | 9298 | "doesn%'t match prototype", parm); |
c1771a20 | 9299 | pedwarn (current_function_prototype_locus, OPT_Wpedantic, |
509c9d60 | 9300 | "prototype declaration"); |
50a9145c | 9301 | } |
51e29401 | 9302 | } |
66db6b62 ZW |
9303 | else |
9304 | { | |
6fb58bba | 9305 | if (current_function_prototype_built_in) |
c2255bc4 AH |
9306 | warning_at (DECL_SOURCE_LOCATION (parm), |
9307 | 0, "argument %qD doesn%'t match " | |
9308 | "built-in prototype", parm); | |
6fb58bba JM |
9309 | else |
9310 | { | |
c2255bc4 AH |
9311 | error_at (DECL_SOURCE_LOCATION (parm), |
9312 | "argument %qD doesn%'t match prototype", parm); | |
9313 | error_at (current_function_prototype_locus, | |
9314 | "prototype declaration"); | |
6fb58bba | 9315 | } |
66db6b62 | 9316 | } |
51e29401 | 9317 | } |
51e29401 | 9318 | } |
3fa8871b | 9319 | TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = NULL_TREE; |
66db6b62 | 9320 | } |
51e29401 | 9321 | |
66db6b62 | 9322 | /* Otherwise, create a prototype that would match. */ |
51e29401 | 9323 | |
66db6b62 ZW |
9324 | else |
9325 | { | |
3fa8871b | 9326 | tree actual = NULL_TREE, last = NULL_TREE, type; |
51e29401 | 9327 | |
910ad8de | 9328 | for (parm = DECL_ARGUMENTS (fndecl); parm; parm = DECL_CHAIN (parm)) |
66db6b62 ZW |
9329 | { |
9330 | type = tree_cons (NULL_TREE, DECL_ARG_TYPE (parm), NULL_TREE); | |
51e29401 RS |
9331 | if (last) |
9332 | TREE_CHAIN (last) = type; | |
9333 | else | |
9334 | actual = type; | |
66db6b62 ZW |
9335 | last = type; |
9336 | } | |
9337 | type = tree_cons (NULL_TREE, void_type_node, NULL_TREE); | |
9338 | if (last) | |
9339 | TREE_CHAIN (last) = type; | |
9340 | else | |
9341 | actual = type; | |
51e29401 | 9342 | |
66db6b62 ZW |
9343 | /* We are going to assign a new value for the TYPE_ACTUAL_ARG_TYPES |
9344 | of the type of this function, but we need to avoid having this | |
9345 | affect the types of other similarly-typed functions, so we must | |
9346 | first force the generation of an identical (but separate) type | |
9347 | node for the relevant function type. The new node we create | |
9348 | will be a variant of the main variant of the original function | |
9349 | type. */ | |
c138f328 | 9350 | |
8dd16ecc | 9351 | TREE_TYPE (fndecl) = build_variant_type_copy (TREE_TYPE (fndecl)); |
c138f328 | 9352 | |
66db6b62 ZW |
9353 | TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = actual; |
9354 | } | |
66db6b62 ZW |
9355 | } |
9356 | ||
d4e43dff ZL |
9357 | /* Store parameter declarations passed in ARG_INFO into the current |
9358 | function declaration. */ | |
9359 | ||
9360 | void | |
f8893e47 | 9361 | store_parm_decls_from (struct c_arg_info *arg_info) |
d4e43dff ZL |
9362 | { |
9363 | current_function_arg_info = arg_info; | |
9364 | store_parm_decls (); | |
9365 | } | |
9366 | ||
5c4abbb8 MP |
9367 | /* Called by walk_tree to look for and update context-less labels. */ |
9368 | ||
9369 | static tree | |
9370 | set_labels_context_r (tree *tp, int *walk_subtrees, void *data) | |
9371 | { | |
9372 | if (TREE_CODE (*tp) == LABEL_EXPR | |
9373 | && DECL_CONTEXT (LABEL_EXPR_LABEL (*tp)) == NULL_TREE) | |
9374 | { | |
9375 | DECL_CONTEXT (LABEL_EXPR_LABEL (*tp)) = static_cast<tree>(data); | |
9376 | *walk_subtrees = 0; | |
9377 | } | |
9378 | ||
9379 | return NULL_TREE; | |
9380 | } | |
9381 | ||
66db6b62 ZW |
9382 | /* Store the parameter declarations into the current function declaration. |
9383 | This is called after parsing the parameter declarations, before | |
9384 | digesting the body of the function. | |
9385 | ||
9386 | For an old-style definition, construct a prototype out of the old-style | |
9387 | parameter declarations and inject it into the function's type. */ | |
9388 | ||
9389 | void | |
9390 | store_parm_decls (void) | |
9391 | { | |
9392 | tree fndecl = current_function_decl; | |
7b112487 | 9393 | bool proto; |
66db6b62 | 9394 | |
77dbdb57 | 9395 | /* The argument information block for FNDECL. */ |
f8893e47 | 9396 | struct c_arg_info *arg_info = current_function_arg_info; |
7b112487 | 9397 | current_function_arg_info = 0; |
77dbdb57 | 9398 | |
f75fbaf7 ZW |
9399 | /* True if this definition is written with a prototype. Note: |
9400 | despite C99 6.7.5.3p14, we can *not* treat an empty argument | |
9401 | list in a function definition as equivalent to (void) -- an | |
9402 | empty argument list specifies the function has no parameters, | |
9403 | but only (void) sets up a prototype for future calls. */ | |
f8893e47 | 9404 | proto = arg_info->types != 0; |
66db6b62 | 9405 | |
f75fbaf7 | 9406 | if (proto) |
77dbdb57 | 9407 | store_parm_decls_newstyle (fndecl, arg_info); |
66db6b62 | 9408 | else |
77dbdb57 | 9409 | store_parm_decls_oldstyle (fndecl, arg_info); |
51e29401 | 9410 | |
f75fbaf7 | 9411 | /* The next call to push_scope will be a function body. */ |
51e29401 | 9412 | |
a8ccdffe | 9413 | next_is_function_body = true; |
51e29401 | 9414 | |
51e29401 RS |
9415 | /* Write a record describing this function definition to the prototypes |
9416 | file (if requested). */ | |
9417 | ||
f75fbaf7 | 9418 | gen_aux_info_record (fndecl, 1, 0, proto); |
51e29401 RS |
9419 | |
9420 | /* Initialize the RTL code for the function. */ | |
182e0d71 | 9421 | allocate_struct_function (fndecl, false); |
51e29401 | 9422 | |
3797cb21 | 9423 | if (warn_unused_local_typedefs) |
766090c2 | 9424 | cfun->language = ggc_cleared_alloc<language_function> (); |
3797cb21 | 9425 | |
8f17b5c5 | 9426 | /* Begin the statement tree for this function. */ |
325c3691 | 9427 | DECL_SAVED_TREE (fndecl) = push_stmt_list (); |
51e29401 | 9428 | |
82c82743 | 9429 | /* ??? Insert the contents of the pending sizes list into the function |
4744afba RH |
9430 | to be evaluated. The only reason left to have this is |
9431 | void foo(int n, int array[n++]) | |
9432 | because we throw away the array type in favor of a pointer type, and | |
9433 | thus won't naturally see the SAVE_EXPR containing the increment. All | |
9434 | other pending sizes would be handled by gimplify_parameters. */ | |
a04a722b | 9435 | if (arg_info->pending_sizes) |
5c4abbb8 MP |
9436 | { |
9437 | /* In very special circumstances, e.g. for code like | |
9438 | _Atomic int i = 5; | |
9439 | void f (int a[i += 2]) {} | |
9440 | we need to execute the atomic assignment on function entry. | |
9441 | But in this case, it is not just a straight store, it has the | |
9442 | op= form, which means that build_atomic_assign has generated | |
9443 | gotos, labels, etc. Because at that time the function decl | |
9444 | for F has not been created yet, those labels do not have any | |
9445 | function context. But we have the fndecl now, so update the | |
9446 | labels accordingly. gimplify_expr would crash otherwise. */ | |
9447 | walk_tree_without_duplicates (&arg_info->pending_sizes, | |
9448 | set_labels_context_r, fndecl); | |
9449 | add_stmt (arg_info->pending_sizes); | |
9450 | } | |
51e29401 | 9451 | } |
acf0174b JJ |
9452 | |
9453 | /* Store PARM_DECLs in PARMS into scope temporarily. Used for | |
9454 | c_finish_omp_declare_simd for function prototypes. No diagnostics | |
9455 | should be done. */ | |
9456 | ||
9457 | void | |
9458 | temp_store_parm_decls (tree fndecl, tree parms) | |
9459 | { | |
9460 | push_scope (); | |
9461 | for (tree p = parms; p; p = DECL_CHAIN (p)) | |
9462 | { | |
9463 | DECL_CONTEXT (p) = fndecl; | |
9464 | if (DECL_NAME (p)) | |
9465 | bind (DECL_NAME (p), p, current_scope, | |
9466 | /*invisible=*/false, /*nested=*/false, | |
9467 | UNKNOWN_LOCATION); | |
9468 | } | |
9469 | } | |
9470 | ||
9471 | /* Undo what temp_store_parm_decls did. */ | |
9472 | ||
9473 | void | |
9474 | temp_pop_parm_decls (void) | |
9475 | { | |
9476 | /* Clear all bindings in this temporary scope, so that | |
9477 | pop_scope doesn't create a BLOCK. */ | |
9478 | struct c_binding *b = current_scope->bindings; | |
9479 | current_scope->bindings = NULL; | |
9480 | for (; b; b = free_binding_and_advance (b)) | |
9481 | { | |
fce5e5e3 JJ |
9482 | gcc_assert (TREE_CODE (b->decl) == PARM_DECL |
9483 | || b->decl == error_mark_node); | |
acf0174b JJ |
9484 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
9485 | I_SYMBOL_BINDING (b->id) = b->shadowed; | |
9486 | if (b->shadowed && b->shadowed->u.type) | |
9487 | TREE_TYPE (b->shadowed->decl) = b->shadowed->u.type; | |
9488 | } | |
9489 | pop_scope (); | |
9490 | } | |
51e29401 | 9491 | \f |
6de9cd9a | 9492 | |
51e29401 | 9493 | /* Finish up a function declaration and compile that function |
cc343f65 | 9494 | all the way to assembler language output. Then free the storage |
51e29401 RS |
9495 | for the function definition. |
9496 | ||
4a46cbfb | 9497 | This is called after parsing the body of the function definition. */ |
51e29401 RS |
9498 | |
9499 | void | |
edaf3e03 | 9500 | finish_function (void) |
51e29401 | 9501 | { |
b3694847 | 9502 | tree fndecl = current_function_decl; |
6c39e757 NP |
9503 | |
9504 | if (c_dialect_objc ()) | |
9505 | objc_finish_function (); | |
51e29401 | 9506 | |
61f71b34 DD |
9507 | if (TREE_CODE (fndecl) == FUNCTION_DECL |
9508 | && targetm.calls.promote_prototypes (TREE_TYPE (fndecl))) | |
9509 | { | |
9510 | tree args = DECL_ARGUMENTS (fndecl); | |
910ad8de | 9511 | for (; args; args = DECL_CHAIN (args)) |
c22cacf3 MS |
9512 | { |
9513 | tree type = TREE_TYPE (args); | |
9514 | if (INTEGRAL_TYPE_P (type) | |
9515 | && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) | |
267bac10 | 9516 | DECL_ARG_TYPE (args) = c_type_promotes_to (type); |
c22cacf3 | 9517 | } |
61f71b34 DD |
9518 | } |
9519 | ||
67b28863 | 9520 | if (DECL_INITIAL (fndecl) && DECL_INITIAL (fndecl) != error_mark_node) |
af3fbed1 | 9521 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; |
51e29401 RS |
9522 | |
9523 | /* Must mark the RESULT_DECL as being in this function. */ | |
9524 | ||
67b28863 | 9525 | if (DECL_RESULT (fndecl) && DECL_RESULT (fndecl) != error_mark_node) |
af3fbed1 | 9526 | DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl; |
51e29401 | 9527 | |
4003301d MLI |
9528 | if (MAIN_NAME_P (DECL_NAME (fndecl)) && flag_hosted |
9529 | && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (fndecl))) | |
9530 | == integer_type_node && flag_isoc99) | |
9531 | { | |
4003301d MLI |
9532 | /* Hack. We don't want the middle-end to warn that this return |
9533 | is unreachable, so we mark its location as special. Using | |
9534 | UNKNOWN_LOCATION has the problem that it gets clobbered in | |
9535 | annotate_one_with_locus. A cleaner solution might be to | |
9536 | ensure ! should_carry_locus_p (stmt), but that needs a flag. | |
9537 | */ | |
c2255bc4 | 9538 | c_finish_return (BUILTINS_LOCATION, integer_zero_node, NULL_TREE); |
51e29401 | 9539 | } |
35b1a6fa | 9540 | |
8f17b5c5 | 9541 | /* Tie off the statement tree for this function. */ |
325c3691 RH |
9542 | DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl)); |
9543 | ||
9544 | finish_fname_decls (); | |
5ce89b2e | 9545 | |
b67b9225 DP |
9546 | /* Complain if there's no return statement only if option specified on |
9547 | command line. */ | |
9548 | if (warn_return_type > 0 | |
46cfb101 | 9549 | && TREE_CODE (TREE_TYPE (TREE_TYPE (fndecl))) != VOID_TYPE |
5ce89b2e | 9550 | && !current_function_returns_value && !current_function_returns_null |
41806d92 | 9551 | /* Don't complain if we are no-return. */ |
5ce89b2e | 9552 | && !current_function_returns_abnormally |
ef5d1181 JJ |
9553 | /* Don't complain if we are declared noreturn. */ |
9554 | && !TREE_THIS_VOLATILE (fndecl) | |
5ce89b2e JM |
9555 | /* Don't warn for main(). */ |
9556 | && !MAIN_NAME_P (DECL_NAME (fndecl)) | |
9557 | /* Or if they didn't actually specify a return type. */ | |
9558 | && !C_FUNCTION_IMPLICIT_INT (fndecl) | |
7e8b322a JH |
9559 | /* Normally, with -Wreturn-type, flow will complain, but we might |
9560 | optimize out static functions. */ | |
9561 | && !TREE_PUBLIC (fndecl)) | |
9da58884 | 9562 | { |
3176a0c2 DD |
9563 | warning (OPT_Wreturn_type, |
9564 | "no return statement in function returning non-void"); | |
9da58884 JH |
9565 | TREE_NO_WARNING (fndecl) = 1; |
9566 | } | |
5ce89b2e | 9567 | |
ebfbbdc5 JJ |
9568 | /* Complain about parameters that are only set, but never otherwise used. */ |
9569 | if (warn_unused_but_set_parameter) | |
9570 | { | |
9571 | tree decl; | |
9572 | ||
9573 | for (decl = DECL_ARGUMENTS (fndecl); | |
9574 | decl; | |
910ad8de | 9575 | decl = DECL_CHAIN (decl)) |
ebfbbdc5 JJ |
9576 | if (TREE_USED (decl) |
9577 | && TREE_CODE (decl) == PARM_DECL | |
9578 | && !DECL_READ_P (decl) | |
9579 | && DECL_NAME (decl) | |
9580 | && !DECL_ARTIFICIAL (decl) | |
9581 | && !TREE_NO_WARNING (decl)) | |
9582 | warning_at (DECL_SOURCE_LOCATION (decl), | |
9583 | OPT_Wunused_but_set_parameter, | |
9584 | "parameter %qD set but not used", decl); | |
9585 | } | |
9586 | ||
3797cb21 DS |
9587 | /* Complain about locally defined typedefs that are not used in this |
9588 | function. */ | |
9589 | maybe_warn_unused_local_typedefs (); | |
9590 | ||
da2e71c9 MLI |
9591 | /* Possibly warn about unused parameters. */ |
9592 | if (warn_unused_parameter) | |
9593 | do_warn_unused_parameter (fndecl); | |
9594 | ||
6de9cd9a DN |
9595 | /* Store the end of the function, so that we get good line number |
9596 | info for the epilogue. */ | |
9597 | cfun->function_end_locus = input_location; | |
9598 | ||
b2ca3702 MM |
9599 | /* Finalize the ELF visibility for the function. */ |
9600 | c_determine_visibility (fndecl); | |
9601 | ||
c536a6a7 | 9602 | /* For GNU C extern inline functions disregard inline limits. */ |
b8698a0f | 9603 | if (DECL_EXTERNAL (fndecl) |
673a107a JJ |
9604 | && DECL_DECLARED_INLINE_P (fndecl) |
9605 | && (flag_gnu89_inline | |
9606 | || lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (fndecl)))) | |
c536a6a7 RG |
9607 | DECL_DISREGARD_INLINE_LIMITS (fndecl) = 1; |
9608 | ||
6de9cd9a DN |
9609 | /* Genericize before inlining. Delay genericizing nested functions |
9610 | until their parent function is genericized. Since finalizing | |
9611 | requires GENERIC, delay that as well. */ | |
118a3a8b | 9612 | |
73aea290 JM |
9613 | if (DECL_INITIAL (fndecl) && DECL_INITIAL (fndecl) != error_mark_node |
9614 | && !undef_nested_function) | |
6de9cd9a DN |
9615 | { |
9616 | if (!decl_function_context (fndecl)) | |
c22cacf3 | 9617 | { |
1c701f96 | 9618 | invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl); |
c22cacf3 | 9619 | c_genericize (fndecl); |
1a94c545 JH |
9620 | |
9621 | /* ??? Objc emits functions after finalizing the compilation unit. | |
9622 | This should be cleaned up later and this conditional removed. */ | |
3dafb85c | 9623 | if (symtab->global_info_ready) |
1a94c545 | 9624 | { |
d52f5295 | 9625 | cgraph_node::add_new_function (fndecl, false); |
1a94c545 JH |
9626 | return; |
9627 | } | |
3dafb85c | 9628 | cgraph_node::finalize_function (fndecl, false); |
c22cacf3 | 9629 | } |
6de9cd9a | 9630 | else |
c22cacf3 MS |
9631 | { |
9632 | /* Register this function with cgraph just far enough to get it | |
9633 | added to our parent's nested function list. Handy, since the | |
9634 | C front end doesn't have such a list. */ | |
d52f5295 | 9635 | (void) cgraph_node::get_create (fndecl); |
c22cacf3 | 9636 | } |
6de9cd9a DN |
9637 | } |
9638 | ||
73aea290 JM |
9639 | if (!decl_function_context (fndecl)) |
9640 | undef_nested_function = false; | |
9641 | ||
3797cb21 DS |
9642 | if (cfun->language != NULL) |
9643 | { | |
9644 | ggc_free (cfun->language); | |
9645 | cfun->language = NULL; | |
9646 | } | |
9647 | ||
1da326c3 | 9648 | /* We're leaving the context of this function, so zap cfun. |
6de9cd9a | 9649 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in |
1da326c3 | 9650 | tree_rest_of_compilation. */ |
db2960f4 | 9651 | set_cfun (NULL); |
ea5b45b6 | 9652 | invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION, current_function_decl); |
4a46cbfb | 9653 | current_function_decl = NULL; |
8f17b5c5 | 9654 | } |
51e29401 | 9655 | \f |
77c4d6c0 | 9656 | /* Check the declarations given in a for-loop for satisfying the C99 |
c2255bc4 | 9657 | constraints. If exactly one such decl is found, return it. LOC is |
f05b9d93 NP |
9658 | the location of the opening parenthesis of the for loop. The last |
9659 | parameter allows you to control the "for loop initial declarations | |
9660 | are only allowed in C99 mode". Normally, you should pass | |
9661 | flag_isoc99 as that parameter. But in some cases (Objective-C | |
9662 | foreach loop, for example) we want to run the checks in this | |
9663 | function even if not in C99 mode, so we allow the caller to turn | |
9664 | off the error about not being in C99 mode. | |
9665 | */ | |
953ff289 DN |
9666 | |
9667 | tree | |
f05b9d93 | 9668 | check_for_loop_decls (location_t loc, bool turn_off_iso_c99_error) |
77c4d6c0 | 9669 | { |
f75fbaf7 | 9670 | struct c_binding *b; |
953ff289 DN |
9671 | tree one_decl = NULL_TREE; |
9672 | int n_decls = 0; | |
9673 | ||
f05b9d93 | 9674 | if (!turn_off_iso_c99_error) |
77c4d6c0 | 9675 | { |
e9527cfd | 9676 | static bool hint = true; |
77c4d6c0 JM |
9677 | /* If we get here, declarations have been used in a for loop without |
9678 | the C99 for loop scope. This doesn't make much sense, so don't | |
9679 | allow it. */ | |
c2255bc4 | 9680 | error_at (loc, "%<for%> loop initial declarations " |
92f20202 | 9681 | "are only allowed in C99 or C11 mode"); |
e9527cfd MLI |
9682 | if (hint) |
9683 | { | |
c2255bc4 | 9684 | inform (loc, |
92f20202 MP |
9685 | "use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 " |
9686 | "to compile your code"); | |
e9527cfd MLI |
9687 | hint = false; |
9688 | } | |
953ff289 | 9689 | return NULL_TREE; |
77c4d6c0 | 9690 | } |
e4d44a37 MP |
9691 | else |
9692 | pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not support %<for%> loop " | |
9693 | "initial declarations"); | |
9694 | ||
77c4d6c0 JM |
9695 | /* C99 subclause 6.8.5 paragraph 3: |
9696 | ||
9697 | [#3] The declaration part of a for statement shall only | |
9698 | declare identifiers for objects having storage class auto or | |
9699 | register. | |
9700 | ||
9701 | It isn't clear whether, in this sentence, "identifiers" binds to | |
9702 | "shall only declare" or to "objects" - that is, whether all identifiers | |
9703 | declared must be identifiers for objects, or whether the restriction | |
9704 | only applies to those that are. (A question on this in comp.std.c | |
9705 | in November 2000 received no answer.) We implement the strictest | |
9706 | interpretation, to avoid creating an extension which later causes | |
9707 | problems. */ | |
9708 | ||
f75fbaf7 | 9709 | for (b = current_scope->bindings; b; b = b->prev) |
77c4d6c0 | 9710 | { |
f75fbaf7 ZW |
9711 | tree id = b->id; |
9712 | tree decl = b->decl; | |
53fcdc76 | 9713 | |
f75fbaf7 ZW |
9714 | if (!id) |
9715 | continue; | |
9716 | ||
9717 | switch (TREE_CODE (decl)) | |
9718 | { | |
9719 | case VAR_DECL: | |
c2255bc4 AH |
9720 | { |
9721 | location_t decl_loc = DECL_SOURCE_LOCATION (decl); | |
9722 | if (TREE_STATIC (decl)) | |
9723 | error_at (decl_loc, | |
9724 | "declaration of static variable %qD in %<for%> loop " | |
9725 | "initial declaration", decl); | |
9726 | else if (DECL_EXTERNAL (decl)) | |
9727 | error_at (decl_loc, | |
9728 | "declaration of %<extern%> variable %qD in %<for%> loop " | |
9729 | "initial declaration", decl); | |
9730 | } | |
f75fbaf7 ZW |
9731 | break; |
9732 | ||
9733 | case RECORD_TYPE: | |
c2255bc4 AH |
9734 | error_at (loc, |
9735 | "%<struct %E%> declared in %<for%> loop initial " | |
9736 | "declaration", id); | |
f75fbaf7 ZW |
9737 | break; |
9738 | case UNION_TYPE: | |
c2255bc4 AH |
9739 | error_at (loc, |
9740 | "%<union %E%> declared in %<for%> loop initial declaration", | |
9741 | id); | |
f75fbaf7 ZW |
9742 | break; |
9743 | case ENUMERAL_TYPE: | |
c2255bc4 AH |
9744 | error_at (loc, "%<enum %E%> declared in %<for%> loop " |
9745 | "initial declaration", id); | |
f75fbaf7 ZW |
9746 | break; |
9747 | default: | |
c2255bc4 AH |
9748 | error_at (loc, "declaration of non-variable " |
9749 | "%qD in %<for%> loop initial declaration", decl); | |
f75fbaf7 | 9750 | } |
953ff289 DN |
9751 | |
9752 | n_decls++; | |
9753 | one_decl = decl; | |
77c4d6c0 | 9754 | } |
953ff289 DN |
9755 | |
9756 | return n_decls == 1 ? one_decl : NULL_TREE; | |
77c4d6c0 JM |
9757 | } |
9758 | \f | |
51e29401 RS |
9759 | /* Save and reinitialize the variables |
9760 | used during compilation of a C function. */ | |
9761 | ||
9762 | void | |
d2784db4 | 9763 | c_push_function_context (void) |
51e29401 | 9764 | { |
b6fbbea3 MI |
9765 | struct language_function *p = cfun->language; |
9766 | /* cfun->language might have been already allocated by the use of | |
9767 | -Wunused-local-typedefs. In that case, just re-use it. */ | |
9768 | if (p == NULL) | |
766090c2 | 9769 | cfun->language = p = ggc_cleared_alloc<language_function> (); |
51e29401 | 9770 | |
8f17b5c5 | 9771 | p->base.x_stmt_tree = c_stmt_tree; |
9771b263 | 9772 | c_stmt_tree.x_cur_stmt_list = vec_safe_copy (c_stmt_tree.x_cur_stmt_list); |
506e2710 RH |
9773 | p->x_break_label = c_break_label; |
9774 | p->x_cont_label = c_cont_label; | |
9775 | p->x_switch_stack = c_switch_stack; | |
7b112487 | 9776 | p->arg_info = current_function_arg_info; |
51e29401 RS |
9777 | p->returns_value = current_function_returns_value; |
9778 | p->returns_null = current_function_returns_null; | |
5ce89b2e | 9779 | p->returns_abnormally = current_function_returns_abnormally; |
51e29401 | 9780 | p->warn_about_return_type = warn_about_return_type; |
d2784db4 PB |
9781 | |
9782 | push_function_context (); | |
51e29401 RS |
9783 | } |
9784 | ||
9785 | /* Restore the variables used during compilation of a C function. */ | |
9786 | ||
9787 | void | |
d2784db4 | 9788 | c_pop_function_context (void) |
51e29401 | 9789 | { |
d2784db4 PB |
9790 | struct language_function *p; |
9791 | ||
9792 | pop_function_context (); | |
9793 | p = cfun->language; | |
b6fbbea3 MI |
9794 | |
9795 | /* When -Wunused-local-typedefs is in effect, cfun->languages is | |
9796 | used to store data throughout the life time of the current cfun, | |
9797 | So don't deallocate it. */ | |
9798 | if (!warn_unused_local_typedefs) | |
9799 | cfun->language = NULL; | |
51e29401 | 9800 | |
1da326c3 | 9801 | if (DECL_STRUCT_FUNCTION (current_function_decl) == 0 |
8f17b5c5 | 9802 | && DECL_SAVED_TREE (current_function_decl) == NULL_TREE) |
51e29401 RS |
9803 | { |
9804 | /* Stop pointing to the local nodes about to be freed. */ | |
9805 | /* But DECL_INITIAL must remain nonzero so we know this | |
9806 | was an actual function definition. */ | |
9807 | DECL_INITIAL (current_function_decl) = error_mark_node; | |
3fa8871b | 9808 | DECL_ARGUMENTS (current_function_decl) = NULL_TREE; |
51e29401 RS |
9809 | } |
9810 | ||
8f17b5c5 | 9811 | c_stmt_tree = p->base.x_stmt_tree; |
b6fbbea3 | 9812 | p->base.x_stmt_tree.x_cur_stmt_list = NULL; |
506e2710 RH |
9813 | c_break_label = p->x_break_label; |
9814 | c_cont_label = p->x_cont_label; | |
9815 | c_switch_stack = p->x_switch_stack; | |
7b112487 | 9816 | current_function_arg_info = p->arg_info; |
51e29401 RS |
9817 | current_function_returns_value = p->returns_value; |
9818 | current_function_returns_null = p->returns_null; | |
5ce89b2e | 9819 | current_function_returns_abnormally = p->returns_abnormally; |
51e29401 | 9820 | warn_about_return_type = p->warn_about_return_type; |
1526a060 BS |
9821 | } |
9822 | ||
f2c5f623 BC |
9823 | /* The functions below are required for functionality of doing |
9824 | function at once processing in the C front end. Currently these | |
9825 | functions are not called from anywhere in the C front end, but as | |
6645c3fa | 9826 | these changes continue, that will change. */ |
f2c5f623 | 9827 | |
ae499cce MM |
9828 | /* Returns the stmt_tree (if any) to which statements are currently |
9829 | being added. If there is no active statement-tree, NULL is | |
9830 | returned. */ | |
9831 | ||
9832 | stmt_tree | |
35b1a6fa | 9833 | current_stmt_tree (void) |
ae499cce | 9834 | { |
8f17b5c5 MM |
9835 | return &c_stmt_tree; |
9836 | } | |
9837 | ||
339a28b9 | 9838 | /* Return the global value of T as a symbol. */ |
5fd8e536 JM |
9839 | |
9840 | tree | |
35b1a6fa | 9841 | identifier_global_value (tree t) |
5fd8e536 | 9842 | { |
f75fbaf7 | 9843 | struct c_binding *b; |
339a28b9 | 9844 | |
f75fbaf7 | 9845 | for (b = I_SYMBOL_BINDING (t); b; b = b->shadowed) |
9aaabf8a | 9846 | if (B_IN_FILE_SCOPE (b) || B_IN_EXTERNAL_SCOPE (b)) |
f75fbaf7 | 9847 | return b->decl; |
339a28b9 | 9848 | |
6574d78e | 9849 | return NULL_TREE; |
5fd8e536 | 9850 | } |
eaa7c03f | 9851 | |
3a636414 JM |
9852 | /* In C, the only C-linkage public declaration is at file scope. */ |
9853 | ||
9854 | tree | |
9855 | c_linkage_bindings (tree name) | |
9856 | { | |
9857 | return identifier_global_value (name); | |
9858 | } | |
9859 | ||
eaa7c03f JM |
9860 | /* Record a builtin type for C. If NAME is non-NULL, it is the name used; |
9861 | otherwise the name is found in ridpointers from RID_INDEX. */ | |
9862 | ||
9863 | void | |
35b1a6fa | 9864 | record_builtin_type (enum rid rid_index, const char *name, tree type) |
eaa7c03f | 9865 | { |
ca043393 | 9866 | tree id, decl; |
eaa7c03f JM |
9867 | if (name == 0) |
9868 | id = ridpointers[(int) rid_index]; | |
9869 | else | |
9870 | id = get_identifier (name); | |
c2255bc4 | 9871 | decl = build_decl (UNKNOWN_LOCATION, TYPE_DECL, id, type); |
ca043393 ZW |
9872 | pushdecl (decl); |
9873 | if (debug_hooks->type_decl) | |
9874 | debug_hooks->type_decl (decl, false); | |
eaa7c03f JM |
9875 | } |
9876 | ||
9877 | /* Build the void_list_node (void_type_node having been created). */ | |
9878 | tree | |
35b1a6fa | 9879 | build_void_list_node (void) |
eaa7c03f JM |
9880 | { |
9881 | tree t = build_tree_list (NULL_TREE, void_type_node); | |
9882 | return t; | |
9883 | } | |
81a75f0f | 9884 | |
f8893e47 | 9885 | /* Return a c_parm structure with the given SPECS, ATTRS and DECLARATOR. */ |
00325bce | 9886 | |
f8893e47 | 9887 | struct c_parm * |
deb176fa | 9888 | build_c_parm (struct c_declspecs *specs, tree attrs, |
8139a48e DM |
9889 | struct c_declarator *declarator, |
9890 | location_t loc) | |
00325bce | 9891 | { |
f8893e47 JM |
9892 | struct c_parm *ret = XOBNEW (&parser_obstack, struct c_parm); |
9893 | ret->specs = specs; | |
9894 | ret->attrs = attrs; | |
9895 | ret->declarator = declarator; | |
8139a48e | 9896 | ret->loc = loc; |
f8893e47 | 9897 | return ret; |
00325bce JM |
9898 | } |
9899 | ||
9900 | /* Return a declarator with nested attributes. TARGET is the inner | |
9901 | declarator to which these attributes apply. ATTRS are the | |
9902 | attributes. */ | |
9903 | ||
f8893e47 JM |
9904 | struct c_declarator * |
9905 | build_attrs_declarator (tree attrs, struct c_declarator *target) | |
00325bce | 9906 | { |
f8893e47 JM |
9907 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); |
9908 | ret->kind = cdk_attrs; | |
9909 | ret->declarator = target; | |
9910 | ret->u.attrs = attrs; | |
9911 | return ret; | |
00325bce JM |
9912 | } |
9913 | ||
9914 | /* Return a declarator for a function with arguments specified by ARGS | |
9915 | and return type specified by TARGET. */ | |
9916 | ||
f8893e47 JM |
9917 | struct c_declarator * |
9918 | build_function_declarator (struct c_arg_info *args, | |
9919 | struct c_declarator *target) | |
00325bce | 9920 | { |
f8893e47 JM |
9921 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); |
9922 | ret->kind = cdk_function; | |
9923 | ret->declarator = target; | |
9924 | ret->u.arg_info = args; | |
9925 | return ret; | |
9926 | } | |
9927 | ||
9928 | /* Return a declarator for the identifier IDENT (which may be | |
9929 | NULL_TREE for an abstract declarator). */ | |
9930 | ||
9931 | struct c_declarator * | |
9932 | build_id_declarator (tree ident) | |
9933 | { | |
9934 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); | |
9935 | ret->kind = cdk_id; | |
9936 | ret->declarator = 0; | |
9937 | ret->u.id = ident; | |
6037d88d PB |
9938 | /* Default value - may get reset to a more precise location. */ |
9939 | ret->id_loc = input_location; | |
f8893e47 | 9940 | return ret; |
00325bce JM |
9941 | } |
9942 | ||
81a75f0f NB |
9943 | /* Return something to represent absolute declarators containing a *. |
9944 | TARGET is the absolute declarator that the * contains. | |
deb176fa JM |
9945 | TYPE_QUALS_ATTRS is a structure for type qualifiers and attributes |
9946 | to apply to the pointer type. */ | |
81a75f0f | 9947 | |
f8893e47 | 9948 | struct c_declarator * |
deb176fa JM |
9949 | make_pointer_declarator (struct c_declspecs *type_quals_attrs, |
9950 | struct c_declarator *target) | |
81a75f0f | 9951 | { |
deb176fa | 9952 | tree attrs; |
3b53cddc | 9953 | int quals = 0; |
f8893e47 JM |
9954 | struct c_declarator *itarget = target; |
9955 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); | |
deb176fa JM |
9956 | if (type_quals_attrs) |
9957 | { | |
9958 | attrs = type_quals_attrs->attrs; | |
3b53cddc | 9959 | quals = quals_from_declspecs (type_quals_attrs); |
deb176fa JM |
9960 | if (attrs != NULL_TREE) |
9961 | itarget = build_attrs_declarator (attrs, target); | |
9962 | } | |
f8893e47 JM |
9963 | ret->kind = cdk_pointer; |
9964 | ret->declarator = itarget; | |
3b53cddc | 9965 | ret->u.pointer_quals = quals; |
deb176fa JM |
9966 | return ret; |
9967 | } | |
9968 | ||
9969 | /* Return a pointer to a structure for an empty list of declaration | |
9970 | specifiers. */ | |
9971 | ||
9972 | struct c_declspecs * | |
9973 | build_null_declspecs (void) | |
9974 | { | |
9975 | struct c_declspecs *ret = XOBNEW (&parser_obstack, struct c_declspecs); | |
f48dfe98 | 9976 | memset (ret, 0, sizeof *ret); |
d19fa6b5 | 9977 | ret->align_log = -1; |
98c3a782 | 9978 | ret->typespec_word = cts_none; |
9a26d6ee | 9979 | ret->storage_class = csc_none; |
928c19bb | 9980 | ret->expr_const_operands = true; |
9e5b2115 | 9981 | ret->typespec_kind = ctsk_none; |
36c5e70a | 9982 | ret->address_space = ADDR_SPACE_GENERIC; |
f8893e47 | 9983 | return ret; |
81a75f0f | 9984 | } |
e2500fed | 9985 | |
36c5e70a BE |
9986 | /* Add the address space ADDRSPACE to the declaration specifiers |
9987 | SPECS, returning SPECS. */ | |
9988 | ||
9989 | struct c_declspecs * | |
620e594b | 9990 | declspecs_add_addrspace (location_t location, |
0b2c4be5 | 9991 | struct c_declspecs *specs, addr_space_t as) |
36c5e70a BE |
9992 | { |
9993 | specs->non_sc_seen_p = true; | |
9994 | specs->declspecs_seen_p = true; | |
9995 | ||
9996 | if (!ADDR_SPACE_GENERIC_P (specs->address_space) | |
9997 | && specs->address_space != as) | |
9998 | error ("incompatible address space qualifiers %qs and %qs", | |
9999 | c_addr_space_name (as), | |
10000 | c_addr_space_name (specs->address_space)); | |
10001 | else | |
0b2c4be5 DS |
10002 | { |
10003 | specs->address_space = as; | |
10004 | specs->locations[cdw_address_space] = location; | |
10005 | } | |
36c5e70a BE |
10006 | return specs; |
10007 | } | |
10008 | ||
deb176fa JM |
10009 | /* Add the type qualifier QUAL to the declaration specifiers SPECS, |
10010 | returning SPECS. */ | |
10011 | ||
10012 | struct c_declspecs * | |
620e594b | 10013 | declspecs_add_qual (location_t loc, |
0b2c4be5 | 10014 | struct c_declspecs *specs, tree qual) |
deb176fa JM |
10015 | { |
10016 | enum rid i; | |
3b53cddc | 10017 | bool dupe = false; |
deb176fa | 10018 | specs->non_sc_seen_p = true; |
27bf414c | 10019 | specs->declspecs_seen_p = true; |
deb176fa JM |
10020 | gcc_assert (TREE_CODE (qual) == IDENTIFIER_NODE |
10021 | && C_IS_RESERVED_WORD (qual)); | |
10022 | i = C_RID_CODE (qual); | |
e3455240 | 10023 | location_t prev_loc = UNKNOWN_LOCATION; |
3b53cddc JM |
10024 | switch (i) |
10025 | { | |
10026 | case RID_CONST: | |
10027 | dupe = specs->const_p; | |
10028 | specs->const_p = true; | |
d6e83a8d | 10029 | prev_loc = specs->locations[cdw_const]; |
0b2c4be5 | 10030 | specs->locations[cdw_const] = loc; |
3b53cddc JM |
10031 | break; |
10032 | case RID_VOLATILE: | |
10033 | dupe = specs->volatile_p; | |
10034 | specs->volatile_p = true; | |
d6e83a8d | 10035 | prev_loc = specs->locations[cdw_volatile]; |
0b2c4be5 | 10036 | specs->locations[cdw_volatile] = loc; |
3b53cddc JM |
10037 | break; |
10038 | case RID_RESTRICT: | |
10039 | dupe = specs->restrict_p; | |
10040 | specs->restrict_p = true; | |
d6e83a8d | 10041 | prev_loc = specs->locations[cdw_restrict]; |
0b2c4be5 | 10042 | specs->locations[cdw_restrict] = loc; |
3b53cddc | 10043 | break; |
267bac10 JM |
10044 | case RID_ATOMIC: |
10045 | dupe = specs->atomic_p; | |
10046 | specs->atomic_p = true; | |
d6e83a8d MM |
10047 | prev_loc = specs->locations[cdw_atomic]; |
10048 | specs->locations[cdw_atomic] = loc; | |
267bac10 | 10049 | break; |
3b53cddc JM |
10050 | default: |
10051 | gcc_unreachable (); | |
10052 | } | |
f3bede71 | 10053 | if (dupe) |
d6e83a8d MM |
10054 | { |
10055 | bool warned = pedwarn_c90 (loc, OPT_Wpedantic, | |
10056 | "duplicate %qE declaration specifier", qual); | |
10057 | if (!warned | |
10058 | && warn_duplicate_decl_specifier | |
10059 | && prev_loc >= RESERVED_LOCATION_COUNT | |
10060 | && !from_macro_expansion_at (prev_loc) | |
10061 | && !from_macro_expansion_at (loc)) | |
10062 | warning_at (loc, OPT_Wduplicate_decl_specifier, | |
10063 | "duplicate %qE declaration specifier", qual); | |
10064 | } | |
deb176fa JM |
10065 | return specs; |
10066 | } | |
10067 | ||
10068 | /* Add the type specifier TYPE to the declaration specifiers SPECS, | |
10069 | returning SPECS. */ | |
10070 | ||
10071 | struct c_declspecs * | |
dc491a25 ILT |
10072 | declspecs_add_type (location_t loc, struct c_declspecs *specs, |
10073 | struct c_typespec spec) | |
deb176fa | 10074 | { |
81da229b | 10075 | tree type = spec.spec; |
deb176fa | 10076 | specs->non_sc_seen_p = true; |
27bf414c | 10077 | specs->declspecs_seen_p = true; |
9e5b2115 | 10078 | specs->typespec_kind = spec.kind; |
deb176fa JM |
10079 | if (TREE_DEPRECATED (type)) |
10080 | specs->deprecated_p = true; | |
deb176fa | 10081 | |
98c3a782 | 10082 | /* Handle type specifier keywords. */ |
eea1139b ILT |
10083 | if (TREE_CODE (type) == IDENTIFIER_NODE |
10084 | && C_IS_RESERVED_WORD (type) | |
10085 | && C_RID_CODE (type) != RID_CXX_COMPAT_WARN) | |
deb176fa JM |
10086 | { |
10087 | enum rid i = C_RID_CODE (type); | |
98c3a782 JM |
10088 | if (specs->type) |
10089 | { | |
dc491a25 | 10090 | error_at (loc, "two or more data types in declaration specifiers"); |
98c3a782 JM |
10091 | return specs; |
10092 | } | |
deb176fa JM |
10093 | if ((int) i <= (int) RID_LAST_MODIFIER) |
10094 | { | |
ab22c1fa | 10095 | /* "long", "short", "signed", "unsigned", "_Complex" or "_Sat". */ |
98c3a782 JM |
10096 | bool dupe = false; |
10097 | switch (i) | |
deb176fa | 10098 | { |
98c3a782 | 10099 | case RID_LONG: |
deb176fa | 10100 | if (specs->long_long_p) |
deb176fa | 10101 | { |
dc491a25 | 10102 | error_at (loc, "%<long long long%> is too long for GCC"); |
98c3a782 JM |
10103 | break; |
10104 | } | |
10105 | if (specs->long_p) | |
10106 | { | |
10107 | if (specs->typespec_word == cts_double) | |
10108 | { | |
dc491a25 ILT |
10109 | error_at (loc, |
10110 | ("both %<long long%> and %<double%> in " | |
10111 | "declaration specifiers")); | |
98c3a782 JM |
10112 | break; |
10113 | } | |
dc491a25 | 10114 | pedwarn_c90 (loc, OPT_Wlong_long, |
9c650d90 | 10115 | "ISO C90 does not support %<long long%>"); |
deb176fa | 10116 | specs->long_long_p = 1; |
0b2c4be5 | 10117 | specs->locations[cdw_long_long] = loc; |
98c3a782 | 10118 | break; |
deb176fa | 10119 | } |
98c3a782 | 10120 | if (specs->short_p) |
dc491a25 ILT |
10121 | error_at (loc, |
10122 | ("both %<long%> and %<short%> in " | |
10123 | "declaration specifiers")); | |
38b7bc7f JM |
10124 | else if (specs->typespec_word == cts_auto_type) |
10125 | error_at (loc, | |
10126 | ("both %<long%> and %<__auto_type%> in " | |
10127 | "declaration specifiers")); | |
98c3a782 | 10128 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10129 | error_at (loc, |
10130 | ("both %<long%> and %<void%> in " | |
10131 | "declaration specifiers")); | |
78a7c317 | 10132 | else if (specs->typespec_word == cts_int_n) |
a6766312 | 10133 | error_at (loc, |
78a7c317 DD |
10134 | ("both %<long%> and %<__int%d%> in " |
10135 | "declaration specifiers"), | |
10136 | int_n_data[specs->int_n_idx].bitsize); | |
98c3a782 | 10137 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10138 | error_at (loc, |
10139 | ("both %<long%> and %<_Bool%> in " | |
10140 | "declaration specifiers")); | |
98c3a782 | 10141 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
10142 | error_at (loc, |
10143 | ("both %<long%> and %<char%> in " | |
10144 | "declaration specifiers")); | |
98c3a782 | 10145 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10146 | error_at (loc, |
10147 | ("both %<long%> and %<float%> in " | |
10148 | "declaration specifiers")); | |
c65699ef JM |
10149 | else if (specs->typespec_word == cts_floatn_nx) |
10150 | error_at (loc, | |
10151 | ("both %<long%> and %<_Float%d%s%> in " | |
10152 | "declaration specifiers"), | |
10153 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10154 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10155 | ? "x" | |
10156 | : "")); | |
9a8ce21f | 10157 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10158 | error_at (loc, |
10159 | ("both %<long%> and %<_Decimal32%> in " | |
10160 | "declaration specifiers")); | |
9a8ce21f | 10161 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10162 | error_at (loc, |
10163 | ("both %<long%> and %<_Decimal64%> in " | |
10164 | "declaration specifiers")); | |
9a8ce21f | 10165 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10166 | error_at (loc, |
10167 | ("both %<long%> and %<_Decimal128%> in " | |
10168 | "declaration specifiers")); | |
98c3a782 | 10169 | else |
0b2c4be5 DS |
10170 | { |
10171 | specs->long_p = true; | |
10172 | specs->locations[cdw_long] = loc; | |
10173 | } | |
98c3a782 JM |
10174 | break; |
10175 | case RID_SHORT: | |
10176 | dupe = specs->short_p; | |
10177 | if (specs->long_p) | |
dc491a25 ILT |
10178 | error_at (loc, |
10179 | ("both %<long%> and %<short%> in " | |
10180 | "declaration specifiers")); | |
38b7bc7f JM |
10181 | else if (specs->typespec_word == cts_auto_type) |
10182 | error_at (loc, | |
10183 | ("both %<short%> and %<__auto_type%> in " | |
10184 | "declaration specifiers")); | |
98c3a782 | 10185 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10186 | error_at (loc, |
10187 | ("both %<short%> and %<void%> in " | |
10188 | "declaration specifiers")); | |
78a7c317 | 10189 | else if (specs->typespec_word == cts_int_n) |
a6766312 | 10190 | error_at (loc, |
78a7c317 DD |
10191 | ("both %<short%> and %<__int%d%> in " |
10192 | "declaration specifiers"), | |
10193 | int_n_data[specs->int_n_idx].bitsize); | |
98c3a782 | 10194 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10195 | error_at (loc, |
10196 | ("both %<short%> and %<_Bool%> in " | |
10197 | "declaration specifiers")); | |
98c3a782 | 10198 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
10199 | error_at (loc, |
10200 | ("both %<short%> and %<char%> in " | |
10201 | "declaration specifiers")); | |
98c3a782 | 10202 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10203 | error_at (loc, |
10204 | ("both %<short%> and %<float%> in " | |
10205 | "declaration specifiers")); | |
98c3a782 | 10206 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
10207 | error_at (loc, |
10208 | ("both %<short%> and %<double%> in " | |
10209 | "declaration specifiers")); | |
c65699ef JM |
10210 | else if (specs->typespec_word == cts_floatn_nx) |
10211 | error_at (loc, | |
10212 | ("both %<short%> and %<_Float%d%s%> in " | |
10213 | "declaration specifiers"), | |
10214 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10215 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10216 | ? "x" | |
10217 | : "")); | |
9a8ce21f | 10218 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10219 | error_at (loc, |
10220 | ("both %<short%> and %<_Decimal32%> in " | |
10221 | "declaration specifiers")); | |
9a8ce21f | 10222 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10223 | error_at (loc, |
10224 | ("both %<short%> and %<_Decimal64%> in " | |
10225 | "declaration specifiers")); | |
9a8ce21f | 10226 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10227 | error_at (loc, |
10228 | ("both %<short%> and %<_Decimal128%> in " | |
10229 | "declaration specifiers")); | |
98c3a782 | 10230 | else |
0b2c4be5 DS |
10231 | { |
10232 | specs->short_p = true; | |
10233 | specs->locations[cdw_short] = loc; | |
10234 | } | |
98c3a782 JM |
10235 | break; |
10236 | case RID_SIGNED: | |
10237 | dupe = specs->signed_p; | |
10238 | if (specs->unsigned_p) | |
dc491a25 ILT |
10239 | error_at (loc, |
10240 | ("both %<signed%> and %<unsigned%> in " | |
10241 | "declaration specifiers")); | |
38b7bc7f JM |
10242 | else if (specs->typespec_word == cts_auto_type) |
10243 | error_at (loc, | |
10244 | ("both %<signed%> and %<__auto_type%> in " | |
10245 | "declaration specifiers")); | |
98c3a782 | 10246 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10247 | error_at (loc, |
10248 | ("both %<signed%> and %<void%> in " | |
10249 | "declaration specifiers")); | |
98c3a782 | 10250 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10251 | error_at (loc, |
10252 | ("both %<signed%> and %<_Bool%> in " | |
10253 | "declaration specifiers")); | |
98c3a782 | 10254 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10255 | error_at (loc, |
10256 | ("both %<signed%> and %<float%> in " | |
10257 | "declaration specifiers")); | |
98c3a782 | 10258 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
10259 | error_at (loc, |
10260 | ("both %<signed%> and %<double%> in " | |
10261 | "declaration specifiers")); | |
c65699ef JM |
10262 | else if (specs->typespec_word == cts_floatn_nx) |
10263 | error_at (loc, | |
10264 | ("both %<signed%> and %<_Float%d%s%> in " | |
10265 | "declaration specifiers"), | |
10266 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10267 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10268 | ? "x" | |
10269 | : "")); | |
9a8ce21f | 10270 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10271 | error_at (loc, |
10272 | ("both %<signed%> and %<_Decimal32%> in " | |
10273 | "declaration specifiers")); | |
9a8ce21f | 10274 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10275 | error_at (loc, |
10276 | ("both %<signed%> and %<_Decimal64%> in " | |
10277 | "declaration specifiers")); | |
9a8ce21f | 10278 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10279 | error_at (loc, |
10280 | ("both %<signed%> and %<_Decimal128%> in " | |
10281 | "declaration specifiers")); | |
98c3a782 | 10282 | else |
0b2c4be5 DS |
10283 | { |
10284 | specs->signed_p = true; | |
10285 | specs->locations[cdw_signed] = loc; | |
10286 | } | |
98c3a782 JM |
10287 | break; |
10288 | case RID_UNSIGNED: | |
10289 | dupe = specs->unsigned_p; | |
10290 | if (specs->signed_p) | |
dc491a25 ILT |
10291 | error_at (loc, |
10292 | ("both %<signed%> and %<unsigned%> in " | |
10293 | "declaration specifiers")); | |
38b7bc7f JM |
10294 | else if (specs->typespec_word == cts_auto_type) |
10295 | error_at (loc, | |
10296 | ("both %<unsigned%> and %<__auto_type%> in " | |
10297 | "declaration specifiers")); | |
98c3a782 | 10298 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10299 | error_at (loc, |
10300 | ("both %<unsigned%> and %<void%> in " | |
10301 | "declaration specifiers")); | |
98c3a782 | 10302 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10303 | error_at (loc, |
10304 | ("both %<unsigned%> and %<_Bool%> in " | |
10305 | "declaration specifiers")); | |
98c3a782 | 10306 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10307 | error_at (loc, |
10308 | ("both %<unsigned%> and %<float%> in " | |
10309 | "declaration specifiers")); | |
98c3a782 | 10310 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
10311 | error_at (loc, |
10312 | ("both %<unsigned%> and %<double%> in " | |
10313 | "declaration specifiers")); | |
c65699ef JM |
10314 | else if (specs->typespec_word == cts_floatn_nx) |
10315 | error_at (loc, | |
10316 | ("both %<unsigned%> and %<_Float%d%s%> in " | |
10317 | "declaration specifiers"), | |
10318 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10319 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10320 | ? "x" | |
10321 | : "")); | |
9a8ce21f | 10322 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10323 | error_at (loc, |
10324 | ("both %<unsigned%> and %<_Decimal32%> in " | |
10325 | "declaration specifiers")); | |
9a8ce21f | 10326 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10327 | error_at (loc, |
10328 | ("both %<unsigned%> and %<_Decimal64%> in " | |
10329 | "declaration specifiers")); | |
9a8ce21f | 10330 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10331 | error_at (loc, |
10332 | ("both %<unsigned%> and %<_Decimal128%> in " | |
10333 | "declaration specifiers")); | |
98c3a782 | 10334 | else |
0b2c4be5 DS |
10335 | { |
10336 | specs->unsigned_p = true; | |
10337 | specs->locations[cdw_unsigned] = loc; | |
10338 | } | |
98c3a782 JM |
10339 | break; |
10340 | case RID_COMPLEX: | |
10341 | dupe = specs->complex_p; | |
f3bede71 MP |
10342 | if (!in_system_header_at (loc)) |
10343 | pedwarn_c90 (loc, OPT_Wpedantic, | |
10344 | "ISO C90 does not support complex types"); | |
38b7bc7f JM |
10345 | if (specs->typespec_word == cts_auto_type) |
10346 | error_at (loc, | |
10347 | ("both %<complex%> and %<__auto_type%> in " | |
10348 | "declaration specifiers")); | |
10349 | else if (specs->typespec_word == cts_void) | |
dc491a25 ILT |
10350 | error_at (loc, |
10351 | ("both %<complex%> and %<void%> in " | |
10352 | "declaration specifiers")); | |
98c3a782 | 10353 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10354 | error_at (loc, |
10355 | ("both %<complex%> and %<_Bool%> in " | |
10356 | "declaration specifiers")); | |
9a8ce21f | 10357 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10358 | error_at (loc, |
10359 | ("both %<complex%> and %<_Decimal32%> in " | |
10360 | "declaration specifiers")); | |
9a8ce21f | 10361 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10362 | error_at (loc, |
10363 | ("both %<complex%> and %<_Decimal64%> in " | |
10364 | "declaration specifiers")); | |
9a8ce21f | 10365 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10366 | error_at (loc, |
10367 | ("both %<complex%> and %<_Decimal128%> in " | |
10368 | "declaration specifiers")); | |
ab22c1fa | 10369 | else if (specs->typespec_word == cts_fract) |
dc491a25 ILT |
10370 | error_at (loc, |
10371 | ("both %<complex%> and %<_Fract%> in " | |
10372 | "declaration specifiers")); | |
ab22c1fa | 10373 | else if (specs->typespec_word == cts_accum) |
dc491a25 ILT |
10374 | error_at (loc, |
10375 | ("both %<complex%> and %<_Accum%> in " | |
10376 | "declaration specifiers")); | |
ab22c1fa | 10377 | else if (specs->saturating_p) |
dc491a25 ILT |
10378 | error_at (loc, |
10379 | ("both %<complex%> and %<_Sat%> in " | |
10380 | "declaration specifiers")); | |
98c3a782 | 10381 | else |
0b2c4be5 DS |
10382 | { |
10383 | specs->complex_p = true; | |
10384 | specs->locations[cdw_complex] = loc; | |
10385 | } | |
98c3a782 | 10386 | break; |
ab22c1fa CF |
10387 | case RID_SAT: |
10388 | dupe = specs->saturating_p; | |
c1771a20 | 10389 | pedwarn (loc, OPT_Wpedantic, |
dc491a25 | 10390 | "ISO C does not support saturating types"); |
78a7c317 | 10391 | if (specs->typespec_word == cts_int_n) |
a6766312 KT |
10392 | { |
10393 | error_at (loc, | |
78a7c317 DD |
10394 | ("both %<_Sat%> and %<__int%d%> in " |
10395 | "declaration specifiers"), | |
10396 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 | 10397 | } |
38b7bc7f JM |
10398 | else if (specs->typespec_word == cts_auto_type) |
10399 | error_at (loc, | |
10400 | ("both %<_Sat%> and %<__auto_type%> in " | |
10401 | "declaration specifiers")); | |
a6766312 | 10402 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10403 | error_at (loc, |
10404 | ("both %<_Sat%> and %<void%> in " | |
10405 | "declaration specifiers")); | |
ab22c1fa | 10406 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10407 | error_at (loc, |
10408 | ("both %<_Sat%> and %<_Bool%> in " | |
10409 | "declaration specifiers")); | |
ab22c1fa | 10410 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
10411 | error_at (loc, |
10412 | ("both %<_Sat%> and %<char%> in " | |
10413 | "declaration specifiers")); | |
ab22c1fa | 10414 | else if (specs->typespec_word == cts_int) |
dc491a25 ILT |
10415 | error_at (loc, |
10416 | ("both %<_Sat%> and %<int%> in " | |
10417 | "declaration specifiers")); | |
ab22c1fa | 10418 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10419 | error_at (loc, |
10420 | ("both %<_Sat%> and %<float%> in " | |
10421 | "declaration specifiers")); | |
ab22c1fa | 10422 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
10423 | error_at (loc, |
10424 | ("both %<_Sat%> and %<double%> in " | |
10425 | "declaration specifiers")); | |
c65699ef JM |
10426 | else if (specs->typespec_word == cts_floatn_nx) |
10427 | error_at (loc, | |
10428 | ("both %<_Sat%> and %<_Float%d%s%> in " | |
10429 | "declaration specifiers"), | |
10430 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10431 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10432 | ? "x" | |
10433 | : "")); | |
ab22c1fa | 10434 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10435 | error_at (loc, |
10436 | ("both %<_Sat%> and %<_Decimal32%> in " | |
10437 | "declaration specifiers")); | |
ab22c1fa | 10438 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10439 | error_at (loc, |
10440 | ("both %<_Sat%> and %<_Decimal64%> in " | |
10441 | "declaration specifiers")); | |
ab22c1fa | 10442 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10443 | error_at (loc, |
10444 | ("both %<_Sat%> and %<_Decimal128%> in " | |
10445 | "declaration specifiers")); | |
ab22c1fa | 10446 | else if (specs->complex_p) |
dc491a25 ILT |
10447 | error_at (loc, |
10448 | ("both %<_Sat%> and %<complex%> in " | |
10449 | "declaration specifiers")); | |
ab22c1fa | 10450 | else |
0b2c4be5 DS |
10451 | { |
10452 | specs->saturating_p = true; | |
10453 | specs->locations[cdw_saturating] = loc; | |
10454 | } | |
ab22c1fa | 10455 | break; |
98c3a782 JM |
10456 | default: |
10457 | gcc_unreachable (); | |
deb176fa | 10458 | } |
98c3a782 JM |
10459 | |
10460 | if (dupe) | |
dc491a25 | 10461 | error_at (loc, "duplicate %qE", type); |
deb176fa | 10462 | |
deb176fa JM |
10463 | return specs; |
10464 | } | |
98c3a782 JM |
10465 | else |
10466 | { | |
c65699ef JM |
10467 | /* "void", "_Bool", "char", "int", "float", "double", |
10468 | "_FloatN", "_FloatNx", "_Decimal32", "__intN", | |
10469 | "_Decimal64", "_Decimal128", "_Fract", "_Accum" or | |
38b7bc7f | 10470 | "__auto_type". */ |
98c3a782 JM |
10471 | if (specs->typespec_word != cts_none) |
10472 | { | |
dc491a25 ILT |
10473 | error_at (loc, |
10474 | "two or more data types in declaration specifiers"); | |
98c3a782 JM |
10475 | return specs; |
10476 | } | |
10477 | switch (i) | |
10478 | { | |
38b7bc7f JM |
10479 | case RID_AUTO_TYPE: |
10480 | if (specs->long_p) | |
10481 | error_at (loc, | |
10482 | ("both %<long%> and %<__auto_type%> in " | |
10483 | "declaration specifiers")); | |
10484 | else if (specs->short_p) | |
10485 | error_at (loc, | |
10486 | ("both %<short%> and %<__auto_type%> in " | |
10487 | "declaration specifiers")); | |
10488 | else if (specs->signed_p) | |
10489 | error_at (loc, | |
10490 | ("both %<signed%> and %<__auto_type%> in " | |
10491 | "declaration specifiers")); | |
10492 | else if (specs->unsigned_p) | |
10493 | error_at (loc, | |
10494 | ("both %<unsigned%> and %<__auto_type%> in " | |
10495 | "declaration specifiers")); | |
10496 | else if (specs->complex_p) | |
10497 | error_at (loc, | |
10498 | ("both %<complex%> and %<__auto_type%> in " | |
10499 | "declaration specifiers")); | |
10500 | else if (specs->saturating_p) | |
10501 | error_at (loc, | |
10502 | ("both %<_Sat%> and %<__auto_type%> in " | |
10503 | "declaration specifiers")); | |
10504 | else | |
10505 | { | |
10506 | specs->typespec_word = cts_auto_type; | |
10507 | specs->locations[cdw_typespec] = loc; | |
10508 | } | |
10509 | return specs; | |
78a7c317 DD |
10510 | case RID_INT_N_0: |
10511 | case RID_INT_N_1: | |
10512 | case RID_INT_N_2: | |
10513 | case RID_INT_N_3: | |
10514 | specs->int_n_idx = i - RID_INT_N_0; | |
9edc6e4c | 10515 | if (!in_system_header_at (input_location)) |
c1771a20 | 10516 | pedwarn (loc, OPT_Wpedantic, |
78a7c317 DD |
10517 | "ISO C does not support %<__int%d%> types", |
10518 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
10519 | |
10520 | if (specs->long_p) | |
10521 | error_at (loc, | |
78a7c317 DD |
10522 | ("both %<__int%d%> and %<long%> in " |
10523 | "declaration specifiers"), | |
10524 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
10525 | else if (specs->saturating_p) |
10526 | error_at (loc, | |
78a7c317 DD |
10527 | ("both %<_Sat%> and %<__int%d%> in " |
10528 | "declaration specifiers"), | |
10529 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
10530 | else if (specs->short_p) |
10531 | error_at (loc, | |
78a7c317 DD |
10532 | ("both %<__int%d%> and %<short%> in " |
10533 | "declaration specifiers"), | |
10534 | int_n_data[specs->int_n_idx].bitsize); | |
fe377a48 MP |
10535 | else if (! int_n_enabled_p[specs->int_n_idx]) |
10536 | { | |
10537 | specs->typespec_word = cts_int_n; | |
10538 | error_at (loc, | |
10539 | "%<__int%d%> is not supported on this target", | |
10540 | int_n_data[specs->int_n_idx].bitsize); | |
10541 | } | |
a6766312 | 10542 | else |
0b2c4be5 | 10543 | { |
78a7c317 | 10544 | specs->typespec_word = cts_int_n; |
0b2c4be5 DS |
10545 | specs->locations[cdw_typespec] = loc; |
10546 | } | |
a6766312 | 10547 | return specs; |
98c3a782 JM |
10548 | case RID_VOID: |
10549 | if (specs->long_p) | |
dc491a25 ILT |
10550 | error_at (loc, |
10551 | ("both %<long%> and %<void%> in " | |
10552 | "declaration specifiers")); | |
98c3a782 | 10553 | else if (specs->short_p) |
dc491a25 ILT |
10554 | error_at (loc, |
10555 | ("both %<short%> and %<void%> in " | |
10556 | "declaration specifiers")); | |
98c3a782 | 10557 | else if (specs->signed_p) |
dc491a25 ILT |
10558 | error_at (loc, |
10559 | ("both %<signed%> and %<void%> in " | |
10560 | "declaration specifiers")); | |
98c3a782 | 10561 | else if (specs->unsigned_p) |
dc491a25 ILT |
10562 | error_at (loc, |
10563 | ("both %<unsigned%> and %<void%> in " | |
10564 | "declaration specifiers")); | |
98c3a782 | 10565 | else if (specs->complex_p) |
dc491a25 ILT |
10566 | error_at (loc, |
10567 | ("both %<complex%> and %<void%> in " | |
10568 | "declaration specifiers")); | |
ab22c1fa | 10569 | else if (specs->saturating_p) |
dc491a25 ILT |
10570 | error_at (loc, |
10571 | ("both %<_Sat%> and %<void%> in " | |
10572 | "declaration specifiers")); | |
98c3a782 | 10573 | else |
0b2c4be5 DS |
10574 | { |
10575 | specs->typespec_word = cts_void; | |
10576 | specs->locations[cdw_typespec] = loc; | |
10577 | } | |
98c3a782 JM |
10578 | return specs; |
10579 | case RID_BOOL: | |
f3bede71 MP |
10580 | if (!in_system_header_at (loc)) |
10581 | pedwarn_c90 (loc, OPT_Wpedantic, | |
10582 | "ISO C90 does not support boolean types"); | |
98c3a782 | 10583 | if (specs->long_p) |
dc491a25 ILT |
10584 | error_at (loc, |
10585 | ("both %<long%> and %<_Bool%> in " | |
10586 | "declaration specifiers")); | |
98c3a782 | 10587 | else if (specs->short_p) |
dc491a25 ILT |
10588 | error_at (loc, |
10589 | ("both %<short%> and %<_Bool%> in " | |
10590 | "declaration specifiers")); | |
98c3a782 | 10591 | else if (specs->signed_p) |
dc491a25 ILT |
10592 | error_at (loc, |
10593 | ("both %<signed%> and %<_Bool%> in " | |
10594 | "declaration specifiers")); | |
98c3a782 | 10595 | else if (specs->unsigned_p) |
dc491a25 ILT |
10596 | error_at (loc, |
10597 | ("both %<unsigned%> and %<_Bool%> in " | |
10598 | "declaration specifiers")); | |
98c3a782 | 10599 | else if (specs->complex_p) |
dc491a25 ILT |
10600 | error_at (loc, |
10601 | ("both %<complex%> and %<_Bool%> in " | |
10602 | "declaration specifiers")); | |
ab22c1fa | 10603 | else if (specs->saturating_p) |
dc491a25 ILT |
10604 | error_at (loc, |
10605 | ("both %<_Sat%> and %<_Bool%> in " | |
10606 | "declaration specifiers")); | |
98c3a782 | 10607 | else |
0b2c4be5 DS |
10608 | { |
10609 | specs->typespec_word = cts_bool; | |
10610 | specs->locations[cdw_typespec] = loc; | |
10611 | } | |
98c3a782 JM |
10612 | return specs; |
10613 | case RID_CHAR: | |
10614 | if (specs->long_p) | |
dc491a25 ILT |
10615 | error_at (loc, |
10616 | ("both %<long%> and %<char%> in " | |
10617 | "declaration specifiers")); | |
98c3a782 | 10618 | else if (specs->short_p) |
dc491a25 ILT |
10619 | error_at (loc, |
10620 | ("both %<short%> and %<char%> in " | |
10621 | "declaration specifiers")); | |
ab22c1fa | 10622 | else if (specs->saturating_p) |
dc491a25 ILT |
10623 | error_at (loc, |
10624 | ("both %<_Sat%> and %<char%> in " | |
10625 | "declaration specifiers")); | |
98c3a782 | 10626 | else |
0b2c4be5 DS |
10627 | { |
10628 | specs->typespec_word = cts_char; | |
10629 | specs->locations[cdw_typespec] = loc; | |
10630 | } | |
98c3a782 JM |
10631 | return specs; |
10632 | case RID_INT: | |
ab22c1fa | 10633 | if (specs->saturating_p) |
dc491a25 ILT |
10634 | error_at (loc, |
10635 | ("both %<_Sat%> and %<int%> in " | |
10636 | "declaration specifiers")); | |
ab22c1fa | 10637 | else |
0b2c4be5 DS |
10638 | { |
10639 | specs->typespec_word = cts_int; | |
10640 | specs->locations[cdw_typespec] = loc; | |
10641 | } | |
98c3a782 JM |
10642 | return specs; |
10643 | case RID_FLOAT: | |
10644 | if (specs->long_p) | |
dc491a25 ILT |
10645 | error_at (loc, |
10646 | ("both %<long%> and %<float%> in " | |
10647 | "declaration specifiers")); | |
98c3a782 | 10648 | else if (specs->short_p) |
dc491a25 ILT |
10649 | error_at (loc, |
10650 | ("both %<short%> and %<float%> in " | |
10651 | "declaration specifiers")); | |
98c3a782 | 10652 | else if (specs->signed_p) |
dc491a25 ILT |
10653 | error_at (loc, |
10654 | ("both %<signed%> and %<float%> in " | |
10655 | "declaration specifiers")); | |
98c3a782 | 10656 | else if (specs->unsigned_p) |
dc491a25 ILT |
10657 | error_at (loc, |
10658 | ("both %<unsigned%> and %<float%> in " | |
10659 | "declaration specifiers")); | |
ab22c1fa | 10660 | else if (specs->saturating_p) |
dc491a25 ILT |
10661 | error_at (loc, |
10662 | ("both %<_Sat%> and %<float%> in " | |
10663 | "declaration specifiers")); | |
98c3a782 | 10664 | else |
0b2c4be5 DS |
10665 | { |
10666 | specs->typespec_word = cts_float; | |
10667 | specs->locations[cdw_typespec] = loc; | |
10668 | } | |
98c3a782 JM |
10669 | return specs; |
10670 | case RID_DOUBLE: | |
10671 | if (specs->long_long_p) | |
dc491a25 ILT |
10672 | error_at (loc, |
10673 | ("both %<long long%> and %<double%> in " | |
10674 | "declaration specifiers")); | |
98c3a782 | 10675 | else if (specs->short_p) |
dc491a25 ILT |
10676 | error_at (loc, |
10677 | ("both %<short%> and %<double%> in " | |
10678 | "declaration specifiers")); | |
98c3a782 | 10679 | else if (specs->signed_p) |
dc491a25 ILT |
10680 | error_at (loc, |
10681 | ("both %<signed%> and %<double%> in " | |
10682 | "declaration specifiers")); | |
98c3a782 | 10683 | else if (specs->unsigned_p) |
dc491a25 ILT |
10684 | error_at (loc, |
10685 | ("both %<unsigned%> and %<double%> in " | |
10686 | "declaration specifiers")); | |
ab22c1fa | 10687 | else if (specs->saturating_p) |
dc491a25 ILT |
10688 | error_at (loc, |
10689 | ("both %<_Sat%> and %<double%> in " | |
10690 | "declaration specifiers")); | |
98c3a782 | 10691 | else |
0b2c4be5 DS |
10692 | { |
10693 | specs->typespec_word = cts_double; | |
10694 | specs->locations[cdw_typespec] = loc; | |
10695 | } | |
98c3a782 | 10696 | return specs; |
c65699ef JM |
10697 | CASE_RID_FLOATN_NX: |
10698 | specs->floatn_nx_idx = i - RID_FLOATN_NX_FIRST; | |
10699 | if (!in_system_header_at (input_location)) | |
10700 | pedwarn (loc, OPT_Wpedantic, | |
10701 | "ISO C does not support the %<_Float%d%s%> type", | |
10702 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10703 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10704 | ? "x" | |
10705 | : "")); | |
10706 | ||
10707 | if (specs->long_p) | |
10708 | error_at (loc, | |
10709 | ("both %<long%> and %<_Float%d%s%> in " | |
10710 | "declaration specifiers"), | |
10711 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10712 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10713 | ? "x" | |
10714 | : "")); | |
10715 | else if (specs->short_p) | |
10716 | error_at (loc, | |
10717 | ("both %<short%> and %<_Float%d%s%> in " | |
10718 | "declaration specifiers"), | |
10719 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10720 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10721 | ? "x" | |
10722 | : "")); | |
10723 | else if (specs->signed_p) | |
10724 | error_at (loc, | |
10725 | ("both %<signed%> and %<_Float%d%s%> in " | |
10726 | "declaration specifiers"), | |
10727 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10728 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10729 | ? "x" | |
10730 | : "")); | |
10731 | else if (specs->unsigned_p) | |
10732 | error_at (loc, | |
10733 | ("both %<unsigned%> and %<_Float%d%s%> in " | |
10734 | "declaration specifiers"), | |
10735 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10736 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10737 | ? "x" | |
10738 | : "")); | |
10739 | else if (specs->saturating_p) | |
10740 | error_at (loc, | |
10741 | ("both %<_Sat%> and %<_Float%d%s%> in " | |
10742 | "declaration specifiers"), | |
10743 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10744 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10745 | ? "x" | |
10746 | : "")); | |
10747 | else if (FLOATN_NX_TYPE_NODE (specs->floatn_nx_idx) == NULL_TREE) | |
fe377a48 MP |
10748 | { |
10749 | specs->typespec_word = cts_floatn_nx; | |
10750 | error_at (loc, | |
10751 | "%<_Float%d%s%> is not supported on this target", | |
10752 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10753 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10754 | ? "x" | |
10755 | : "")); | |
10756 | } | |
c65699ef JM |
10757 | else |
10758 | { | |
10759 | specs->typespec_word = cts_floatn_nx; | |
10760 | specs->locations[cdw_typespec] = loc; | |
10761 | } | |
10762 | return specs; | |
9a8ce21f JG |
10763 | case RID_DFLOAT32: |
10764 | case RID_DFLOAT64: | |
10765 | case RID_DFLOAT128: | |
b8698a0f | 10766 | { |
9a8ce21f JG |
10767 | const char *str; |
10768 | if (i == RID_DFLOAT32) | |
10769 | str = "_Decimal32"; | |
10770 | else if (i == RID_DFLOAT64) | |
10771 | str = "_Decimal64"; | |
10772 | else | |
10773 | str = "_Decimal128"; | |
10774 | if (specs->long_long_p) | |
dc491a25 | 10775 | error_at (loc, |
2f6f187a | 10776 | ("both %<long long%> and %qs in " |
dc491a25 ILT |
10777 | "declaration specifiers"), |
10778 | str); | |
9a8ce21f | 10779 | if (specs->long_p) |
dc491a25 | 10780 | error_at (loc, |
2f6f187a | 10781 | ("both %<long%> and %qs in " |
dc491a25 ILT |
10782 | "declaration specifiers"), |
10783 | str); | |
9a8ce21f | 10784 | else if (specs->short_p) |
dc491a25 | 10785 | error_at (loc, |
2f6f187a | 10786 | ("both %<short%> and %qs in " |
dc491a25 ILT |
10787 | "declaration specifiers"), |
10788 | str); | |
9a8ce21f | 10789 | else if (specs->signed_p) |
dc491a25 | 10790 | error_at (loc, |
2f6f187a | 10791 | ("both %<signed%> and %qs in " |
dc491a25 ILT |
10792 | "declaration specifiers"), |
10793 | str); | |
9a8ce21f | 10794 | else if (specs->unsigned_p) |
dc491a25 | 10795 | error_at (loc, |
2f6f187a | 10796 | ("both %<unsigned%> and %qs in " |
dc491a25 ILT |
10797 | "declaration specifiers"), |
10798 | str); | |
9a8ce21f | 10799 | else if (specs->complex_p) |
dc491a25 | 10800 | error_at (loc, |
2f6f187a | 10801 | ("both %<complex%> and %qs in " |
dc491a25 ILT |
10802 | "declaration specifiers"), |
10803 | str); | |
ab22c1fa | 10804 | else if (specs->saturating_p) |
dc491a25 | 10805 | error_at (loc, |
2f6f187a | 10806 | ("both %<_Sat%> and %qs in " |
dc491a25 ILT |
10807 | "declaration specifiers"), |
10808 | str); | |
9a8ce21f JG |
10809 | else if (i == RID_DFLOAT32) |
10810 | specs->typespec_word = cts_dfloat32; | |
10811 | else if (i == RID_DFLOAT64) | |
10812 | specs->typespec_word = cts_dfloat64; | |
10813 | else | |
10814 | specs->typespec_word = cts_dfloat128; | |
0b2c4be5 | 10815 | specs->locations[cdw_typespec] = loc; |
9a8ce21f JG |
10816 | } |
10817 | if (!targetm.decimal_float_supported_p ()) | |
dc491a25 ILT |
10818 | error_at (loc, |
10819 | ("decimal floating point not supported " | |
10820 | "for this target")); | |
c1771a20 | 10821 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 10822 | "ISO C does not support decimal floating point"); |
9a8ce21f | 10823 | return specs; |
ab22c1fa CF |
10824 | case RID_FRACT: |
10825 | case RID_ACCUM: | |
10826 | { | |
10827 | const char *str; | |
10828 | if (i == RID_FRACT) | |
10829 | str = "_Fract"; | |
10830 | else | |
10831 | str = "_Accum"; | |
10832 | if (specs->complex_p) | |
dc491a25 | 10833 | error_at (loc, |
2f6f187a | 10834 | ("both %<complex%> and %qs in " |
dc491a25 ILT |
10835 | "declaration specifiers"), |
10836 | str); | |
ab22c1fa CF |
10837 | else if (i == RID_FRACT) |
10838 | specs->typespec_word = cts_fract; | |
10839 | else | |
10840 | specs->typespec_word = cts_accum; | |
0b2c4be5 | 10841 | specs->locations[cdw_typespec] = loc; |
ab22c1fa CF |
10842 | } |
10843 | if (!targetm.fixed_point_supported_p ()) | |
dc491a25 ILT |
10844 | error_at (loc, |
10845 | "fixed-point types not supported for this target"); | |
c1771a20 | 10846 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 10847 | "ISO C does not support fixed-point types"); |
ab22c1fa | 10848 | return specs; |
98c3a782 JM |
10849 | default: |
10850 | /* ObjC reserved word "id", handled below. */ | |
10851 | break; | |
10852 | } | |
10853 | } | |
deb176fa | 10854 | } |
98c3a782 JM |
10855 | |
10856 | /* Now we have a typedef (a TYPE_DECL node), an identifier (some | |
10857 | form of ObjC type, cases such as "int" and "long" being handled | |
10858 | above), a TYPE (struct, union, enum and typeof specifiers) or an | |
10859 | ERROR_MARK. In none of these cases may there have previously | |
10860 | been any type specifiers. */ | |
10861 | if (specs->type || specs->typespec_word != cts_none | |
10862 | || specs->long_p || specs->short_p || specs->signed_p | |
10863 | || specs->unsigned_p || specs->complex_p) | |
dc491a25 | 10864 | error_at (loc, "two or more data types in declaration specifiers"); |
deb176fa JM |
10865 | else if (TREE_CODE (type) == TYPE_DECL) |
10866 | { | |
10867 | if (TREE_TYPE (type) == error_mark_node) | |
10868 | ; /* Allow the type to default to int to avoid cascading errors. */ | |
10869 | else | |
10870 | { | |
10871 | specs->type = TREE_TYPE (type); | |
10872 | specs->decl_attr = DECL_ATTRIBUTES (type); | |
616aeba2 | 10873 | specs->typedef_p = true; |
98c3a782 | 10874 | specs->explicit_signed_p = C_TYPEDEF_EXPLICITLY_SIGNED (type); |
0b2c4be5 | 10875 | specs->locations[cdw_typedef] = loc; |
dc491a25 ILT |
10876 | |
10877 | /* If this typedef name is defined in a struct, then a C++ | |
10878 | lookup would return a different value. */ | |
10879 | if (warn_cxx_compat | |
10880 | && I_SYMBOL_BINDING (DECL_NAME (type))->in_struct) | |
10881 | warning_at (loc, OPT_Wc___compat, | |
10882 | "C++ lookup of %qD would return a field, not a type", | |
10883 | type); | |
10884 | ||
10885 | /* If we are parsing a struct, record that a struct field | |
10886 | used a typedef. */ | |
10887 | if (warn_cxx_compat && struct_parse_info != NULL) | |
9771b263 | 10888 | struct_parse_info->typedefs_seen.safe_push (type); |
deb176fa JM |
10889 | } |
10890 | } | |
deb176fa JM |
10891 | else if (TREE_CODE (type) == IDENTIFIER_NODE) |
10892 | { | |
10893 | tree t = lookup_name (type); | |
10894 | if (!t || TREE_CODE (t) != TYPE_DECL) | |
dc491a25 | 10895 | error_at (loc, "%qE fails to be a typedef or built in type", type); |
deb176fa JM |
10896 | else if (TREE_TYPE (t) == error_mark_node) |
10897 | ; | |
10898 | else | |
0b2c4be5 DS |
10899 | { |
10900 | specs->type = TREE_TYPE (t); | |
10901 | specs->locations[cdw_typespec] = loc; | |
10902 | } | |
deb176fa | 10903 | } |
29ce73cb | 10904 | else |
81da229b | 10905 | { |
29ce73cb | 10906 | if (TREE_CODE (type) != ERROR_MARK && spec.kind == ctsk_typeof) |
928c19bb JM |
10907 | { |
10908 | specs->typedef_p = true; | |
0b2c4be5 | 10909 | specs->locations[cdw_typedef] = loc; |
928c19bb JM |
10910 | if (spec.expr) |
10911 | { | |
10912 | if (specs->expr) | |
10913 | specs->expr = build2 (COMPOUND_EXPR, TREE_TYPE (spec.expr), | |
10914 | specs->expr, spec.expr); | |
10915 | else | |
10916 | specs->expr = spec.expr; | |
10917 | specs->expr_const_operands &= spec.expr_const_operands; | |
10918 | } | |
10919 | } | |
81da229b JM |
10920 | specs->type = type; |
10921 | } | |
deb176fa JM |
10922 | |
10923 | return specs; | |
10924 | } | |
10925 | ||
10926 | /* Add the storage class specifier or function specifier SCSPEC to the | |
10927 | declaration specifiers SPECS, returning SPECS. */ | |
10928 | ||
10929 | struct c_declspecs * | |
620e594b | 10930 | declspecs_add_scspec (location_t loc, |
0b2c4be5 DS |
10931 | struct c_declspecs *specs, |
10932 | tree scspec) | |
deb176fa JM |
10933 | { |
10934 | enum rid i; | |
9a26d6ee JM |
10935 | enum c_storage_class n = csc_none; |
10936 | bool dupe = false; | |
27bf414c | 10937 | specs->declspecs_seen_p = true; |
deb176fa JM |
10938 | gcc_assert (TREE_CODE (scspec) == IDENTIFIER_NODE |
10939 | && C_IS_RESERVED_WORD (scspec)); | |
10940 | i = C_RID_CODE (scspec); | |
b1ed4cb4 | 10941 | if (specs->non_sc_seen_p) |
b8698a0f | 10942 | warning (OPT_Wold_style_declaration, |
b1ed4cb4 | 10943 | "%qE is not at beginning of declaration", scspec); |
9a26d6ee JM |
10944 | switch (i) |
10945 | { | |
10946 | case RID_INLINE: | |
61f4f1cc JM |
10947 | /* C99 permits duplicate inline. Although of doubtful utility, |
10948 | it seems simplest to permit it in gnu89 mode as well, as | |
10949 | there is also little utility in maintaining this as a | |
10950 | difference between gnu89 and C99 inline. */ | |
10951 | dupe = false; | |
9a26d6ee | 10952 | specs->inline_p = true; |
0b2c4be5 | 10953 | specs->locations[cdw_inline] = loc; |
9a26d6ee | 10954 | break; |
bbceee64 JM |
10955 | case RID_NORETURN: |
10956 | /* Duplicate _Noreturn is permitted. */ | |
10957 | dupe = false; | |
10958 | specs->noreturn_p = true; | |
0b2c4be5 | 10959 | specs->locations[cdw_noreturn] = loc; |
bbceee64 | 10960 | break; |
9a26d6ee JM |
10961 | case RID_THREAD: |
10962 | dupe = specs->thread_p; | |
10963 | if (specs->storage_class == csc_auto) | |
582d9b50 | 10964 | error ("%qE used with %<auto%>", scspec); |
9a26d6ee | 10965 | else if (specs->storage_class == csc_register) |
582d9b50 | 10966 | error ("%qE used with %<register%>", scspec); |
9a26d6ee | 10967 | else if (specs->storage_class == csc_typedef) |
582d9b50 | 10968 | error ("%qE used with %<typedef%>", scspec); |
9a26d6ee | 10969 | else |
0b2c4be5 DS |
10970 | { |
10971 | specs->thread_p = true; | |
582d9b50 JM |
10972 | specs->thread_gnu_p = (strcmp (IDENTIFIER_POINTER (scspec), |
10973 | "__thread") == 0); | |
10974 | /* A diagnostic is not required for the use of this | |
10975 | identifier in the implementation namespace; only diagnose | |
10976 | it for the C11 spelling because of existing code using | |
10977 | the other spelling. */ | |
35aff4fb | 10978 | if (!specs->thread_gnu_p) |
582d9b50 JM |
10979 | { |
10980 | if (flag_isoc99) | |
35aff4fb MP |
10981 | pedwarn_c99 (loc, OPT_Wpedantic, |
10982 | "ISO C99 does not support %qE", scspec); | |
582d9b50 | 10983 | else |
35aff4fb MP |
10984 | pedwarn_c99 (loc, OPT_Wpedantic, |
10985 | "ISO C90 does not support %qE", scspec); | |
582d9b50 | 10986 | } |
0b2c4be5 DS |
10987 | specs->locations[cdw_thread] = loc; |
10988 | } | |
9a26d6ee JM |
10989 | break; |
10990 | case RID_AUTO: | |
10991 | n = csc_auto; | |
10992 | break; | |
10993 | case RID_EXTERN: | |
10994 | n = csc_extern; | |
10995 | /* Diagnose "__thread extern". */ | |
582d9b50 | 10996 | if (specs->thread_p && specs->thread_gnu_p) |
deb176fa | 10997 | error ("%<__thread%> before %<extern%>"); |
9a26d6ee JM |
10998 | break; |
10999 | case RID_REGISTER: | |
11000 | n = csc_register; | |
11001 | break; | |
11002 | case RID_STATIC: | |
11003 | n = csc_static; | |
11004 | /* Diagnose "__thread static". */ | |
582d9b50 | 11005 | if (specs->thread_p && specs->thread_gnu_p) |
deb176fa | 11006 | error ("%<__thread%> before %<static%>"); |
9a26d6ee JM |
11007 | break; |
11008 | case RID_TYPEDEF: | |
11009 | n = csc_typedef; | |
11010 | break; | |
11011 | default: | |
11012 | gcc_unreachable (); | |
11013 | } | |
11014 | if (n != csc_none && n == specs->storage_class) | |
11015 | dupe = true; | |
11016 | if (dupe) | |
582d9b50 JM |
11017 | { |
11018 | if (i == RID_THREAD) | |
11019 | error ("duplicate %<_Thread_local%> or %<__thread%>"); | |
11020 | else | |
11021 | error ("duplicate %qE", scspec); | |
11022 | } | |
9a26d6ee JM |
11023 | if (n != csc_none) |
11024 | { | |
11025 | if (specs->storage_class != csc_none && n != specs->storage_class) | |
11026 | { | |
11027 | error ("multiple storage classes in declaration specifiers"); | |
11028 | } | |
11029 | else | |
11030 | { | |
11031 | specs->storage_class = n; | |
0b2c4be5 | 11032 | specs->locations[cdw_storage_class] = loc; |
9a26d6ee JM |
11033 | if (n != csc_extern && n != csc_static && specs->thread_p) |
11034 | { | |
582d9b50 JM |
11035 | error ("%qs used with %qE", |
11036 | specs->thread_gnu_p ? "__thread" : "_Thread_local", | |
11037 | scspec); | |
9a26d6ee JM |
11038 | specs->thread_p = false; |
11039 | } | |
11040 | } | |
deb176fa | 11041 | } |
deb176fa JM |
11042 | return specs; |
11043 | } | |
11044 | ||
11045 | /* Add the attributes ATTRS to the declaration specifiers SPECS, | |
11046 | returning SPECS. */ | |
11047 | ||
11048 | struct c_declspecs * | |
620e594b | 11049 | declspecs_add_attrs (location_t loc, struct c_declspecs *specs, tree attrs) |
deb176fa JM |
11050 | { |
11051 | specs->attrs = chainon (attrs, specs->attrs); | |
0b2c4be5 | 11052 | specs->locations[cdw_attributes] = loc; |
27bf414c | 11053 | specs->declspecs_seen_p = true; |
deb176fa JM |
11054 | return specs; |
11055 | } | |
11056 | ||
d19fa6b5 JM |
11057 | /* Add an _Alignas specifier (expression ALIGN, or type whose |
11058 | alignment is ALIGN) to the declaration specifiers SPECS, returning | |
11059 | SPECS. */ | |
11060 | struct c_declspecs * | |
620e594b | 11061 | declspecs_add_alignas (location_t loc, |
0b2c4be5 | 11062 | struct c_declspecs *specs, tree align) |
d19fa6b5 | 11063 | { |
d19fa6b5 | 11064 | specs->alignas_p = true; |
0b2c4be5 | 11065 | specs->locations[cdw_alignas] = loc; |
d19fa6b5 JM |
11066 | if (align == error_mark_node) |
11067 | return specs; | |
673670da MS |
11068 | |
11069 | /* Only accept the alignment if it's valid and greater than | |
11070 | the current one. Zero is invalid but by C11 required to | |
11071 | be silently ignored. */ | |
11072 | int align_log = check_user_alignment (align, false, /* warn_zero = */false); | |
d19fa6b5 JM |
11073 | if (align_log > specs->align_log) |
11074 | specs->align_log = align_log; | |
11075 | return specs; | |
11076 | } | |
11077 | ||
98c3a782 JM |
11078 | /* Combine "long", "short", "signed", "unsigned" and "_Complex" type |
11079 | specifiers with any other type specifier to determine the resulting | |
11080 | type. This is where ISO C checks on complex types are made, since | |
11081 | "_Complex long" is a prefix of the valid ISO C type "_Complex long | |
11082 | double". */ | |
11083 | ||
11084 | struct c_declspecs * | |
11085 | finish_declspecs (struct c_declspecs *specs) | |
11086 | { | |
11087 | /* If a type was specified as a whole, we have no modifiers and are | |
11088 | done. */ | |
11089 | if (specs->type != NULL_TREE) | |
11090 | { | |
11091 | gcc_assert (!specs->long_p && !specs->long_long_p && !specs->short_p | |
11092 | && !specs->signed_p && !specs->unsigned_p | |
11093 | && !specs->complex_p); | |
29ce73cb PB |
11094 | |
11095 | /* Set a dummy type. */ | |
11096 | if (TREE_CODE (specs->type) == ERROR_MARK) | |
11097 | specs->type = integer_type_node; | |
98c3a782 JM |
11098 | return specs; |
11099 | } | |
11100 | ||
11101 | /* If none of "void", "_Bool", "char", "int", "float" or "double" | |
11102 | has been specified, treat it as "int" unless "_Complex" is | |
11103 | present and there are no other specifiers. If we just have | |
11104 | "_Complex", it is equivalent to "_Complex double", but e.g. | |
11105 | "_Complex short" is equivalent to "_Complex short int". */ | |
11106 | if (specs->typespec_word == cts_none) | |
11107 | { | |
ab22c1fa | 11108 | if (specs->saturating_p) |
819fec00 | 11109 | { |
0b2c4be5 DS |
11110 | error_at (specs->locations[cdw_saturating], |
11111 | "%<_Sat%> is used without %<_Fract%> or %<_Accum%>"); | |
754ccf7c | 11112 | if (!targetm.fixed_point_supported_p ()) |
0b2c4be5 DS |
11113 | error_at (specs->locations[cdw_saturating], |
11114 | "fixed-point types not supported for this target"); | |
819fec00 NS |
11115 | specs->typespec_word = cts_fract; |
11116 | } | |
11117 | else if (specs->long_p || specs->short_p | |
11118 | || specs->signed_p || specs->unsigned_p) | |
98c3a782 JM |
11119 | { |
11120 | specs->typespec_word = cts_int; | |
11121 | } | |
11122 | else if (specs->complex_p) | |
11123 | { | |
11124 | specs->typespec_word = cts_double; | |
0b2c4be5 | 11125 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 MLI |
11126 | "ISO C does not support plain %<complex%> meaning " |
11127 | "%<double complex%>"); | |
98c3a782 JM |
11128 | } |
11129 | else | |
11130 | { | |
11131 | specs->typespec_word = cts_int; | |
11132 | specs->default_int_p = true; | |
11133 | /* We don't diagnose this here because grokdeclarator will | |
11134 | give more specific diagnostics according to whether it is | |
11135 | a function definition. */ | |
11136 | } | |
11137 | } | |
11138 | ||
11139 | /* If "signed" was specified, record this to distinguish "int" and | |
11140 | "signed int" in the case of a bit-field with | |
11141 | -funsigned-bitfields. */ | |
11142 | specs->explicit_signed_p = specs->signed_p; | |
11143 | ||
11144 | /* Now compute the actual type. */ | |
11145 | switch (specs->typespec_word) | |
11146 | { | |
38b7bc7f JM |
11147 | case cts_auto_type: |
11148 | gcc_assert (!specs->long_p && !specs->short_p | |
11149 | && !specs->signed_p && !specs->unsigned_p | |
11150 | && !specs->complex_p); | |
11151 | /* Type to be filled in later. */ | |
11152 | break; | |
98c3a782 JM |
11153 | case cts_void: |
11154 | gcc_assert (!specs->long_p && !specs->short_p | |
11155 | && !specs->signed_p && !specs->unsigned_p | |
11156 | && !specs->complex_p); | |
11157 | specs->type = void_type_node; | |
11158 | break; | |
11159 | case cts_bool: | |
11160 | gcc_assert (!specs->long_p && !specs->short_p | |
11161 | && !specs->signed_p && !specs->unsigned_p | |
11162 | && !specs->complex_p); | |
11163 | specs->type = boolean_type_node; | |
11164 | break; | |
11165 | case cts_char: | |
11166 | gcc_assert (!specs->long_p && !specs->short_p); | |
11167 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
11168 | if (specs->signed_p) | |
11169 | specs->type = signed_char_type_node; | |
11170 | else if (specs->unsigned_p) | |
11171 | specs->type = unsigned_char_type_node; | |
11172 | else | |
11173 | specs->type = char_type_node; | |
11174 | if (specs->complex_p) | |
11175 | { | |
0b2c4be5 | 11176 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 | 11177 | "ISO C does not support complex integer types"); |
98c3a782 JM |
11178 | specs->type = build_complex_type (specs->type); |
11179 | } | |
11180 | break; | |
78a7c317 | 11181 | case cts_int_n: |
a6766312 KT |
11182 | gcc_assert (!specs->long_p && !specs->short_p && !specs->long_long_p); |
11183 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
666f7903 JJ |
11184 | if (! int_n_enabled_p[specs->int_n_idx]) |
11185 | specs->type = integer_type_node; | |
11186 | else | |
11187 | specs->type = (specs->unsigned_p | |
11188 | ? int_n_trees[specs->int_n_idx].unsigned_type | |
11189 | : int_n_trees[specs->int_n_idx].signed_type); | |
a6766312 KT |
11190 | if (specs->complex_p) |
11191 | { | |
0b2c4be5 | 11192 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
a6766312 KT |
11193 | "ISO C does not support complex integer types"); |
11194 | specs->type = build_complex_type (specs->type); | |
11195 | } | |
11196 | break; | |
98c3a782 JM |
11197 | case cts_int: |
11198 | gcc_assert (!(specs->long_p && specs->short_p)); | |
11199 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
11200 | if (specs->long_long_p) | |
11201 | specs->type = (specs->unsigned_p | |
11202 | ? long_long_unsigned_type_node | |
11203 | : long_long_integer_type_node); | |
11204 | else if (specs->long_p) | |
11205 | specs->type = (specs->unsigned_p | |
11206 | ? long_unsigned_type_node | |
11207 | : long_integer_type_node); | |
11208 | else if (specs->short_p) | |
11209 | specs->type = (specs->unsigned_p | |
11210 | ? short_unsigned_type_node | |
11211 | : short_integer_type_node); | |
11212 | else | |
11213 | specs->type = (specs->unsigned_p | |
11214 | ? unsigned_type_node | |
11215 | : integer_type_node); | |
11216 | if (specs->complex_p) | |
11217 | { | |
0b2c4be5 | 11218 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 | 11219 | "ISO C does not support complex integer types"); |
98c3a782 JM |
11220 | specs->type = build_complex_type (specs->type); |
11221 | } | |
11222 | break; | |
11223 | case cts_float: | |
11224 | gcc_assert (!specs->long_p && !specs->short_p | |
11225 | && !specs->signed_p && !specs->unsigned_p); | |
11226 | specs->type = (specs->complex_p | |
11227 | ? complex_float_type_node | |
11228 | : float_type_node); | |
11229 | break; | |
11230 | case cts_double: | |
11231 | gcc_assert (!specs->long_long_p && !specs->short_p | |
11232 | && !specs->signed_p && !specs->unsigned_p); | |
11233 | if (specs->long_p) | |
11234 | { | |
11235 | specs->type = (specs->complex_p | |
11236 | ? complex_long_double_type_node | |
11237 | : long_double_type_node); | |
11238 | } | |
11239 | else | |
11240 | { | |
11241 | specs->type = (specs->complex_p | |
11242 | ? complex_double_type_node | |
11243 | : double_type_node); | |
11244 | } | |
11245 | break; | |
c65699ef JM |
11246 | case cts_floatn_nx: |
11247 | gcc_assert (!specs->long_p && !specs->short_p | |
11248 | && !specs->signed_p && !specs->unsigned_p); | |
fe377a48 MP |
11249 | if (FLOATN_NX_TYPE_NODE (specs->floatn_nx_idx) == NULL_TREE) |
11250 | specs->type = integer_type_node; | |
11251 | else if (specs->complex_p) | |
11252 | specs->type = COMPLEX_FLOATN_NX_TYPE_NODE (specs->floatn_nx_idx); | |
11253 | else | |
11254 | specs->type = FLOATN_NX_TYPE_NODE (specs->floatn_nx_idx); | |
c65699ef | 11255 | break; |
9a8ce21f JG |
11256 | case cts_dfloat32: |
11257 | case cts_dfloat64: | |
11258 | case cts_dfloat128: | |
11259 | gcc_assert (!specs->long_p && !specs->long_long_p && !specs->short_p | |
11260 | && !specs->signed_p && !specs->unsigned_p && !specs->complex_p); | |
11261 | if (specs->typespec_word == cts_dfloat32) | |
11262 | specs->type = dfloat32_type_node; | |
11263 | else if (specs->typespec_word == cts_dfloat64) | |
11264 | specs->type = dfloat64_type_node; | |
11265 | else | |
11266 | specs->type = dfloat128_type_node; | |
11267 | break; | |
ab22c1fa | 11268 | case cts_fract: |
754ccf7c JJ |
11269 | gcc_assert (!specs->complex_p); |
11270 | if (!targetm.fixed_point_supported_p ()) | |
11271 | specs->type = integer_type_node; | |
11272 | else if (specs->saturating_p) | |
ab22c1fa CF |
11273 | { |
11274 | if (specs->long_long_p) | |
11275 | specs->type = specs->unsigned_p | |
11276 | ? sat_unsigned_long_long_fract_type_node | |
11277 | : sat_long_long_fract_type_node; | |
11278 | else if (specs->long_p) | |
11279 | specs->type = specs->unsigned_p | |
11280 | ? sat_unsigned_long_fract_type_node | |
11281 | : sat_long_fract_type_node; | |
11282 | else if (specs->short_p) | |
11283 | specs->type = specs->unsigned_p | |
11284 | ? sat_unsigned_short_fract_type_node | |
11285 | : sat_short_fract_type_node; | |
11286 | else | |
11287 | specs->type = specs->unsigned_p | |
11288 | ? sat_unsigned_fract_type_node | |
11289 | : sat_fract_type_node; | |
754ccf7c | 11290 | } |
ab22c1fa CF |
11291 | else |
11292 | { | |
11293 | if (specs->long_long_p) | |
11294 | specs->type = specs->unsigned_p | |
11295 | ? unsigned_long_long_fract_type_node | |
11296 | : long_long_fract_type_node; | |
11297 | else if (specs->long_p) | |
11298 | specs->type = specs->unsigned_p | |
11299 | ? unsigned_long_fract_type_node | |
11300 | : long_fract_type_node; | |
11301 | else if (specs->short_p) | |
11302 | specs->type = specs->unsigned_p | |
11303 | ? unsigned_short_fract_type_node | |
11304 | : short_fract_type_node; | |
11305 | else | |
11306 | specs->type = specs->unsigned_p | |
11307 | ? unsigned_fract_type_node | |
11308 | : fract_type_node; | |
754ccf7c | 11309 | } |
ab22c1fa CF |
11310 | break; |
11311 | case cts_accum: | |
754ccf7c JJ |
11312 | gcc_assert (!specs->complex_p); |
11313 | if (!targetm.fixed_point_supported_p ()) | |
11314 | specs->type = integer_type_node; | |
11315 | else if (specs->saturating_p) | |
ab22c1fa CF |
11316 | { |
11317 | if (specs->long_long_p) | |
11318 | specs->type = specs->unsigned_p | |
11319 | ? sat_unsigned_long_long_accum_type_node | |
11320 | : sat_long_long_accum_type_node; | |
11321 | else if (specs->long_p) | |
11322 | specs->type = specs->unsigned_p | |
11323 | ? sat_unsigned_long_accum_type_node | |
11324 | : sat_long_accum_type_node; | |
11325 | else if (specs->short_p) | |
11326 | specs->type = specs->unsigned_p | |
11327 | ? sat_unsigned_short_accum_type_node | |
11328 | : sat_short_accum_type_node; | |
11329 | else | |
11330 | specs->type = specs->unsigned_p | |
11331 | ? sat_unsigned_accum_type_node | |
11332 | : sat_accum_type_node; | |
754ccf7c | 11333 | } |
ab22c1fa CF |
11334 | else |
11335 | { | |
11336 | if (specs->long_long_p) | |
11337 | specs->type = specs->unsigned_p | |
11338 | ? unsigned_long_long_accum_type_node | |
11339 | : long_long_accum_type_node; | |
11340 | else if (specs->long_p) | |
11341 | specs->type = specs->unsigned_p | |
11342 | ? unsigned_long_accum_type_node | |
11343 | : long_accum_type_node; | |
11344 | else if (specs->short_p) | |
11345 | specs->type = specs->unsigned_p | |
11346 | ? unsigned_short_accum_type_node | |
11347 | : short_accum_type_node; | |
11348 | else | |
11349 | specs->type = specs->unsigned_p | |
11350 | ? unsigned_accum_type_node | |
11351 | : accum_type_node; | |
754ccf7c | 11352 | } |
ab22c1fa | 11353 | break; |
98c3a782 JM |
11354 | default: |
11355 | gcc_unreachable (); | |
11356 | } | |
11357 | ||
11358 | return specs; | |
11359 | } | |
11360 | ||
d7438551 AH |
11361 | /* Perform final processing on one file scope's declarations (or the |
11362 | external scope's declarations), GLOBALS. */ | |
db5f8b93 | 11363 | |
f75fbaf7 ZW |
11364 | static void |
11365 | c_write_global_declarations_1 (tree globals) | |
d1bd0ded | 11366 | { |
d1bd0ded | 11367 | tree decl; |
df4b9cfe | 11368 | bool reconsider; |
118a3a8b | 11369 | |
f75fbaf7 | 11370 | /* Process the decls in the order they were written. */ |
910ad8de | 11371 | for (decl = globals; decl; decl = DECL_CHAIN (decl)) |
bc4b653b | 11372 | { |
bc4b653b JM |
11373 | /* Check for used but undefined static functions using the C |
11374 | standard's definition of "used", and set TREE_NO_WARNING so | |
d7438551 | 11375 | that check_global_declaration doesn't repeat the check. */ |
bc4b653b | 11376 | if (TREE_CODE (decl) == FUNCTION_DECL |
3fa8871b | 11377 | && DECL_INITIAL (decl) == NULL_TREE |
bc4b653b | 11378 | && DECL_EXTERNAL (decl) |
cbdd8ae0 | 11379 | && !TREE_PUBLIC (decl)) |
bc4b653b | 11380 | { |
cbdd8ae0 JJ |
11381 | if (C_DECL_USED (decl)) |
11382 | { | |
11383 | pedwarn (input_location, 0, "%q+F used but never defined", decl); | |
11384 | TREE_NO_WARNING (decl) = 1; | |
11385 | } | |
11386 | /* For -Wunused-function warn about unused static prototypes. */ | |
11387 | else if (warn_unused_function | |
11388 | && ! DECL_ARTIFICIAL (decl) | |
11389 | && ! TREE_NO_WARNING (decl)) | |
11390 | { | |
11391 | warning (OPT_Wunused_function, | |
11392 | "%q+F declared %<static%> but never defined", decl); | |
11393 | TREE_NO_WARNING (decl) = 1; | |
11394 | } | |
bc4b653b | 11395 | } |
db5f8b93 RH |
11396 | |
11397 | wrapup_global_declaration_1 (decl); | |
bc4b653b | 11398 | } |
df4b9cfe JJ |
11399 | |
11400 | do | |
11401 | { | |
11402 | reconsider = false; | |
910ad8de | 11403 | for (decl = globals; decl; decl = DECL_CHAIN (decl)) |
df4b9cfe JJ |
11404 | reconsider |= wrapup_global_declaration_2 (decl); |
11405 | } | |
11406 | while (reconsider); | |
d1bd0ded GK |
11407 | } |
11408 | ||
9cc54940 AC |
11409 | /* Callback to collect a source_ref from a DECL. */ |
11410 | ||
11411 | static void | |
11412 | collect_source_ref_cb (tree decl) | |
11413 | { | |
11414 | if (!DECL_IS_BUILTIN (decl)) | |
11415 | collect_source_ref (LOCATION_FILE (decl_sloc (decl, false))); | |
11416 | } | |
11417 | ||
86d71fca AC |
11418 | /* Preserve the external declarations scope across a garbage collect. */ |
11419 | static GTY(()) tree ext_block; | |
11420 | ||
9cc54940 AC |
11421 | /* Collect all references relevant to SOURCE_FILE. */ |
11422 | ||
11423 | static void | |
11424 | collect_all_refs (const char *source_file) | |
11425 | { | |
11426 | tree t; | |
6be14c0e | 11427 | unsigned i; |
9cc54940 | 11428 | |
9771b263 | 11429 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
9cc54940 | 11430 | collect_ada_nodes (BLOCK_VARS (DECL_INITIAL (t)), source_file); |
86d71fca AC |
11431 | |
11432 | collect_ada_nodes (BLOCK_VARS (ext_block), source_file); | |
9cc54940 AC |
11433 | } |
11434 | ||
11435 | /* Iterate over all global declarations and call CALLBACK. */ | |
11436 | ||
11437 | static void | |
11438 | for_each_global_decl (void (*callback) (tree decl)) | |
11439 | { | |
11440 | tree t; | |
11441 | tree decls; | |
11442 | tree decl; | |
6be14c0e | 11443 | unsigned i; |
9cc54940 | 11444 | |
9771b263 | 11445 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
9cc54940 AC |
11446 | { |
11447 | decls = DECL_INITIAL (t); | |
11448 | for (decl = BLOCK_VARS (decls); decl; decl = TREE_CHAIN (decl)) | |
11449 | callback (decl); | |
11450 | } | |
9cc54940 | 11451 | |
86d71fca AC |
11452 | for (decl = BLOCK_VARS (ext_block); decl; decl = TREE_CHAIN (decl)) |
11453 | callback (decl); | |
11454 | } | |
db5f8b93 | 11455 | |
d7438551 AH |
11456 | /* Perform any final parser cleanups and generate initial debugging |
11457 | information. */ | |
11458 | ||
d1bd0ded | 11459 | void |
d7438551 | 11460 | c_parse_final_cleanups (void) |
d1bd0ded | 11461 | { |
db5f8b93 | 11462 | tree t; |
6be14c0e | 11463 | unsigned i; |
e13e48e7 | 11464 | |
f75fbaf7 ZW |
11465 | /* We don't want to do this if generating a PCH. */ |
11466 | if (pch_file) | |
11467 | return; | |
d1bd0ded | 11468 | |
d7438551 | 11469 | timevar_stop (TV_PHASE_PARSING); |
575bfb00 LC |
11470 | timevar_start (TV_PHASE_DEFERRED); |
11471 | ||
977e30bc NP |
11472 | /* Do the Objective-C stuff. This is where all the Objective-C |
11473 | module stuff gets generated (symtab, class/protocol/selector | |
11474 | lists etc). */ | |
11475 | if (c_dialect_objc ()) | |
11476 | objc_write_global_declarations (); | |
11477 | ||
36c1b0de ZW |
11478 | /* Close the external scope. */ |
11479 | ext_block = pop_scope (); | |
11480 | external_scope = 0; | |
366de0ce | 11481 | gcc_assert (!current_scope); |
36c1b0de | 11482 | |
9cc54940 | 11483 | /* Handle -fdump-ada-spec[-slim]. */ |
3b78de56 | 11484 | if (flag_dump_ada_spec || flag_dump_ada_spec_slim) |
9cc54940 AC |
11485 | { |
11486 | /* Build a table of files to generate specs for */ | |
3b78de56 | 11487 | if (flag_dump_ada_spec_slim) |
9cc54940 AC |
11488 | collect_source_ref (main_input_filename); |
11489 | else | |
11490 | for_each_global_decl (collect_source_ref_cb); | |
11491 | ||
11492 | dump_ada_specs (collect_all_refs, NULL); | |
11493 | } | |
11494 | ||
db5f8b93 | 11495 | /* Process all file scopes in this compilation, and the external_scope, |
d7438551 | 11496 | through wrapup_global_declarations. */ |
9771b263 | 11497 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
db5f8b93 | 11498 | c_write_global_declarations_1 (BLOCK_VARS (DECL_INITIAL (t))); |
36c1b0de ZW |
11499 | c_write_global_declarations_1 (BLOCK_VARS (ext_block)); |
11500 | ||
575bfb00 | 11501 | timevar_stop (TV_PHASE_DEFERRED); |
d7438551 | 11502 | timevar_start (TV_PHASE_PARSING); |
db5f8b93 RH |
11503 | |
11504 | ext_block = NULL; | |
d1bd0ded GK |
11505 | } |
11506 | ||
bffad7f1 SB |
11507 | /* Register reserved keyword WORD as qualifier for address space AS. */ |
11508 | ||
11509 | void | |
11510 | c_register_addr_space (const char *word, addr_space_t as) | |
11511 | { | |
11512 | int rid = RID_FIRST_ADDR_SPACE + as; | |
11513 | tree id; | |
11514 | ||
11515 | /* Address space qualifiers are only supported | |
11516 | in C with GNU extensions enabled. */ | |
11517 | if (c_dialect_objc () || flag_no_asm) | |
11518 | return; | |
11519 | ||
11520 | id = get_identifier (word); | |
11521 | C_SET_RID_CODE (id, rid); | |
11522 | C_IS_RESERVED_WORD (id) = 1; | |
11523 | ridpointers [rid] = id; | |
11524 | } | |
11525 | ||
acf0174b JJ |
11526 | /* Return identifier to look up for omp declare reduction. */ |
11527 | ||
11528 | tree | |
11529 | c_omp_reduction_id (enum tree_code reduction_code, tree reduction_id) | |
11530 | { | |
11531 | const char *p = NULL; | |
11532 | switch (reduction_code) | |
11533 | { | |
11534 | case PLUS_EXPR: p = "+"; break; | |
11535 | case MULT_EXPR: p = "*"; break; | |
11536 | case MINUS_EXPR: p = "-"; break; | |
11537 | case BIT_AND_EXPR: p = "&"; break; | |
11538 | case BIT_XOR_EXPR: p = "^"; break; | |
11539 | case BIT_IOR_EXPR: p = "|"; break; | |
11540 | case TRUTH_ANDIF_EXPR: p = "&&"; break; | |
11541 | case TRUTH_ORIF_EXPR: p = "||"; break; | |
11542 | case MIN_EXPR: p = "min"; break; | |
11543 | case MAX_EXPR: p = "max"; break; | |
11544 | default: | |
11545 | break; | |
11546 | } | |
11547 | ||
11548 | if (p == NULL) | |
11549 | { | |
11550 | if (TREE_CODE (reduction_id) != IDENTIFIER_NODE) | |
11551 | return error_mark_node; | |
11552 | p = IDENTIFIER_POINTER (reduction_id); | |
11553 | } | |
11554 | ||
11555 | const char prefix[] = "omp declare reduction "; | |
11556 | size_t lenp = sizeof (prefix); | |
11557 | size_t len = strlen (p); | |
11558 | char *name = XALLOCAVEC (char, lenp + len); | |
11559 | memcpy (name, prefix, lenp - 1); | |
11560 | memcpy (name + lenp - 1, p, len + 1); | |
11561 | return get_identifier (name); | |
11562 | } | |
11563 | ||
11564 | /* Lookup REDUCTION_ID in the current scope, or create an artificial | |
11565 | VAR_DECL, bind it into the current scope and return it. */ | |
11566 | ||
11567 | tree | |
11568 | c_omp_reduction_decl (tree reduction_id) | |
11569 | { | |
11570 | struct c_binding *b = I_SYMBOL_BINDING (reduction_id); | |
11571 | if (b != NULL && B_IN_CURRENT_SCOPE (b)) | |
11572 | return b->decl; | |
11573 | ||
11574 | tree decl = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
11575 | reduction_id, integer_type_node); | |
11576 | DECL_ARTIFICIAL (decl) = 1; | |
11577 | DECL_EXTERNAL (decl) = 1; | |
11578 | TREE_STATIC (decl) = 1; | |
11579 | TREE_PUBLIC (decl) = 0; | |
11580 | bind (reduction_id, decl, current_scope, true, false, BUILTINS_LOCATION); | |
11581 | return decl; | |
11582 | } | |
11583 | ||
11584 | /* Lookup REDUCTION_ID in the first scope where it has entry for TYPE. */ | |
11585 | ||
11586 | tree | |
11587 | c_omp_reduction_lookup (tree reduction_id, tree type) | |
11588 | { | |
11589 | struct c_binding *b = I_SYMBOL_BINDING (reduction_id); | |
11590 | while (b) | |
11591 | { | |
11592 | tree t; | |
11593 | for (t = DECL_INITIAL (b->decl); t; t = TREE_CHAIN (t)) | |
11594 | if (comptypes (TREE_PURPOSE (t), type)) | |
11595 | return TREE_VALUE (t); | |
11596 | b = b->shadowed; | |
11597 | } | |
11598 | return error_mark_node; | |
11599 | } | |
11600 | ||
11601 | /* Helper function called via walk_tree, to diagnose invalid | |
11602 | #pragma omp declare reduction combiners or initializers. */ | |
11603 | ||
11604 | tree | |
11605 | c_check_omp_declare_reduction_r (tree *tp, int *, void *data) | |
11606 | { | |
11607 | tree *vars = (tree *) data; | |
11608 | if (SSA_VAR_P (*tp) | |
11609 | && !DECL_ARTIFICIAL (*tp) | |
11610 | && *tp != vars[0] | |
11611 | && *tp != vars[1]) | |
11612 | { | |
11613 | location_t loc = DECL_SOURCE_LOCATION (vars[0]); | |
11614 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (vars[0])), "omp_out") == 0) | |
11615 | error_at (loc, "%<#pragma omp declare reduction%> combiner refers to " | |
11616 | "variable %qD which is not %<omp_out%> nor %<omp_in%>", | |
11617 | *tp); | |
11618 | else | |
11619 | error_at (loc, "%<#pragma omp declare reduction%> initializer refers " | |
11620 | "to variable %qD which is not %<omp_priv%> nor " | |
11621 | "%<omp_orig%>", | |
11622 | *tp); | |
11623 | return *tp; | |
11624 | } | |
11625 | return NULL_TREE; | |
11626 | } | |
11627 | ||
d4a10d0a | 11628 | #include "gt-c-c-decl.h" |