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51e29401 | 1 | /* Process declarations and variables for C compiler. |
cbe34bb5 | 2 | Copyright (C) 1988-2017 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" |
a0d85b75 | 59 | |
51e29401 RS |
60 | /* In grokdeclarator, distinguish syntactic contexts of declarators. */ |
61 | enum decl_context | |
62 | { NORMAL, /* Ordinary declaration */ | |
63 | FUNCDEF, /* Function definition */ | |
64 | PARM, /* Declaration of parm before function body */ | |
65 | FIELD, /* Declaration inside struct or union */ | |
51e29401 RS |
66 | TYPENAME}; /* Typename (inside cast or sizeof) */ |
67 | ||
0da300cd TT |
68 | /* States indicating how grokdeclarator() should handle declspecs marked |
69 | with __attribute__((deprecated)). An object declared as | |
70 | __attribute__((deprecated)) suppresses warnings of uses of other | |
71 | deprecated items. */ | |
72 | ||
73 | enum deprecated_states { | |
74 | DEPRECATED_NORMAL, | |
75 | DEPRECATED_SUPPRESS | |
76 | }; | |
77 | ||
51e29401 | 78 | \f |
51e29401 RS |
79 | /* Nonzero if we have seen an invalid cross reference |
80 | to a struct, union, or enum, but not yet printed the message. */ | |
51e29401 | 81 | tree pending_invalid_xref; |
093c7153 | 82 | |
51e29401 | 83 | /* File and line to appear in the eventual error message. */ |
070588f0 | 84 | location_t pending_invalid_xref_location; |
51e29401 | 85 | |
77dbdb57 ZW |
86 | /* The file and line that the prototype came from if this is an |
87 | old-style definition; used for diagnostics in | |
88 | store_parm_decls_oldstyle. */ | |
eb1dfbb2 | 89 | |
95035b6f | 90 | static location_t current_function_prototype_locus; |
50a9145c | 91 | |
6fb58bba JM |
92 | /* Whether this prototype was built-in. */ |
93 | ||
94 | static bool current_function_prototype_built_in; | |
95 | ||
96 | /* The argument type information of this prototype. */ | |
97 | ||
98 | static tree current_function_prototype_arg_types; | |
99 | ||
7b112487 JM |
100 | /* The argument information structure for the function currently being |
101 | defined. */ | |
102 | ||
f8893e47 | 103 | static struct c_arg_info *current_function_arg_info; |
7b112487 | 104 | |
bc4b653b JM |
105 | /* The obstack on which parser and related data structures, which are |
106 | not live beyond their top-level declaration or definition, are | |
107 | allocated. */ | |
108 | struct obstack parser_obstack; | |
109 | ||
8f17b5c5 MM |
110 | /* The current statement tree. */ |
111 | ||
e2500fed | 112 | static GTY(()) struct stmt_tree_s c_stmt_tree; |
8f17b5c5 | 113 | |
6614fd40 | 114 | /* State saving variables. */ |
506e2710 RH |
115 | tree c_break_label; |
116 | tree c_cont_label; | |
e13e48e7 | 117 | |
f75fbaf7 ZW |
118 | /* A list of decls to be made automatically visible in each file scope. */ |
119 | static GTY(()) tree visible_builtins; | |
120 | ||
51e29401 RS |
121 | /* Set to 0 at beginning of a function definition, set to 1 if |
122 | a return statement that specifies a return value is seen. */ | |
123 | ||
124 | int current_function_returns_value; | |
125 | ||
126 | /* Set to 0 at beginning of a function definition, set to 1 if | |
127 | a return statement with no argument is seen. */ | |
128 | ||
129 | int current_function_returns_null; | |
130 | ||
5ce89b2e JM |
131 | /* Set to 0 at beginning of a function definition, set to 1 if |
132 | a call to a noreturn function is seen. */ | |
133 | ||
134 | int current_function_returns_abnormally; | |
135 | ||
51e29401 RS |
136 | /* Set to nonzero by `grokdeclarator' for a function |
137 | whose return type is defaulted, if warnings for this are desired. */ | |
138 | ||
139 | static int warn_about_return_type; | |
140 | ||
73aea290 JM |
141 | /* Nonzero when the current toplevel function contains a declaration |
142 | of a nested function which is never defined. */ | |
143 | ||
144 | static bool undef_nested_function; | |
145 | ||
acf0174b JJ |
146 | /* If non-zero, implicit "omp declare target" attribute is added into the |
147 | attribute lists. */ | |
148 | int current_omp_declare_target_attribute; | |
51e29401 | 149 | \f |
f75fbaf7 ZW |
150 | /* Each c_binding structure describes one binding of an identifier to |
151 | a decl. All the decls in a scope - irrespective of namespace - are | |
152 | chained together by the ->prev field, which (as the name implies) | |
153 | runs in reverse order. All the decls in a given namespace bound to | |
154 | a given identifier are chained by the ->shadowed field, which runs | |
9aaabf8a | 155 | from inner to outer scopes. |
f75fbaf7 ZW |
156 | |
157 | The ->decl field usually points to a DECL node, but there are two | |
158 | exceptions. In the namespace of type tags, the bound entity is a | |
159 | RECORD_TYPE, UNION_TYPE, or ENUMERAL_TYPE node. If an undeclared | |
160 | identifier is encountered, it is bound to error_mark_node to | |
161 | suppress further errors about that identifier in the current | |
9aaabf8a ZW |
162 | function. |
163 | ||
e1b7793c | 164 | The ->u.type field stores the type of the declaration in this scope; |
0b410f0b JM |
165 | if NULL, the type is the type of the ->decl field. This is only of |
166 | relevance for objects with external or internal linkage which may | |
167 | be redeclared in inner scopes, forming composite types that only | |
168 | persist for the duration of those scopes. In the external scope, | |
169 | this stores the composite of all the types declared for this | |
170 | object, visible or not. The ->inner_comp field (used only at file | |
171 | scope) stores whether an incomplete array type at file scope was | |
172 | completed at an inner scope to an array size other than 1. | |
173 | ||
e1b7793c ILT |
174 | The ->u.label field is used for labels. It points to a structure |
175 | which stores additional information used for warnings. | |
176 | ||
9aaabf8a ZW |
177 | The depth field is copied from the scope structure that holds this |
178 | decl. It is used to preserve the proper ordering of the ->shadowed | |
179 | field (see bind()) and also for a handful of special-case checks. | |
180 | Finally, the invisible bit is true for a decl which should be | |
181 | ignored for purposes of normal name lookup, and the nested bit is | |
182 | true for a decl that's been bound a second time in an inner scope; | |
183 | in all such cases, the binding in the outer scope will have its | |
184 | invisible bit true. */ | |
f75fbaf7 | 185 | |
d1b38208 | 186 | struct GTY((chain_next ("%h.prev"))) c_binding { |
e1b7793c ILT |
187 | union GTY(()) { /* first so GTY desc can use decl */ |
188 | tree GTY((tag ("0"))) type; /* the type in this scope */ | |
189 | struct c_label_vars * GTY((tag ("1"))) label; /* for warnings */ | |
190 | } GTY((desc ("TREE_CODE (%0.decl) == LABEL_DECL"))) u; | |
f75fbaf7 ZW |
191 | tree decl; /* the decl bound */ |
192 | tree id; /* the identifier it's bound to */ | |
193 | struct c_binding *prev; /* the previous decl in this scope */ | |
194 | struct c_binding *shadowed; /* the innermost decl shadowed by this one */ | |
9aaabf8a ZW |
195 | unsigned int depth : 28; /* depth of this scope */ |
196 | BOOL_BITFIELD invisible : 1; /* normal lookup should ignore this binding */ | |
197 | BOOL_BITFIELD nested : 1; /* do not set DECL_CONTEXT when popping */ | |
0b410f0b | 198 | BOOL_BITFIELD inner_comp : 1; /* incomplete array completed in inner scope */ |
dc491a25 | 199 | BOOL_BITFIELD in_struct : 1; /* currently defined as struct field */ |
b3f27c15 | 200 | location_t locus; /* location for nested bindings */ |
f75fbaf7 | 201 | }; |
9aaabf8a ZW |
202 | #define B_IN_SCOPE(b1, b2) ((b1)->depth == (b2)->depth) |
203 | #define B_IN_CURRENT_SCOPE(b) ((b)->depth == current_scope->depth) | |
204 | #define B_IN_FILE_SCOPE(b) ((b)->depth == 1 /*file_scope->depth*/) | |
205 | #define B_IN_EXTERNAL_SCOPE(b) ((b)->depth == 0 /*external_scope->depth*/) | |
f75fbaf7 | 206 | |
18d5f982 ZW |
207 | /* Each C symbol points to three linked lists of c_binding structures. |
208 | These describe the values of the identifier in the three different | |
209 | namespaces defined by the language. */ | |
210 | ||
d1b38208 | 211 | struct GTY(()) lang_identifier { |
18d5f982 ZW |
212 | struct c_common_identifier common_id; |
213 | struct c_binding *symbol_binding; /* vars, funcs, constants, typedefs */ | |
214 | struct c_binding *tag_binding; /* struct/union/enum tags */ | |
215 | struct c_binding *label_binding; /* labels */ | |
216 | }; | |
217 | ||
218 | /* Validate c-lang.c's assumptions. */ | |
219 | extern char C_SIZEOF_STRUCT_LANG_IDENTIFIER_isnt_accurate | |
220 | [(sizeof(struct lang_identifier) == C_SIZEOF_STRUCT_LANG_IDENTIFIER) ? 1 : -1]; | |
221 | ||
ddc8de03 PM |
222 | /* The binding oracle; see c-tree.h. */ |
223 | void (*c_binding_oracle) (enum c_oracle_request, tree identifier); | |
224 | ||
225 | /* This flag is set on an identifier if we have previously asked the | |
226 | binding oracle for this identifier's symbol binding. */ | |
227 | #define I_SYMBOL_CHECKED(node) \ | |
228 | (TREE_LANG_FLAG_4 (IDENTIFIER_NODE_CHECK (node))) | |
229 | ||
230 | static inline struct c_binding* * | |
231 | i_symbol_binding (tree node) | |
232 | { | |
233 | struct lang_identifier *lid | |
234 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
235 | ||
236 | if (lid->symbol_binding == NULL | |
237 | && c_binding_oracle != NULL | |
238 | && !I_SYMBOL_CHECKED (node)) | |
239 | { | |
240 | /* Set the "checked" flag first, to avoid infinite recursion | |
241 | when the binding oracle calls back into gcc. */ | |
242 | I_SYMBOL_CHECKED (node) = 1; | |
243 | c_binding_oracle (C_ORACLE_SYMBOL, node); | |
244 | } | |
245 | ||
246 | return &lid->symbol_binding; | |
247 | } | |
248 | ||
249 | #define I_SYMBOL_BINDING(node) (*i_symbol_binding (node)) | |
250 | ||
251 | #define I_SYMBOL_DECL(node) \ | |
252 | (I_SYMBOL_BINDING(node) ? I_SYMBOL_BINDING(node)->decl : 0) | |
253 | ||
254 | /* This flag is set on an identifier if we have previously asked the | |
255 | binding oracle for this identifier's tag binding. */ | |
256 | #define I_TAG_CHECKED(node) \ | |
257 | (TREE_LANG_FLAG_5 (IDENTIFIER_NODE_CHECK (node))) | |
258 | ||
259 | static inline struct c_binding ** | |
260 | i_tag_binding (tree node) | |
261 | { | |
262 | struct lang_identifier *lid | |
263 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
264 | ||
265 | if (lid->tag_binding == NULL | |
266 | && c_binding_oracle != NULL | |
267 | && !I_TAG_CHECKED (node)) | |
268 | { | |
269 | /* Set the "checked" flag first, to avoid infinite recursion | |
270 | when the binding oracle calls back into gcc. */ | |
271 | I_TAG_CHECKED (node) = 1; | |
272 | c_binding_oracle (C_ORACLE_TAG, node); | |
273 | } | |
274 | ||
275 | return &lid->tag_binding; | |
276 | } | |
277 | ||
278 | #define I_TAG_BINDING(node) (*i_tag_binding (node)) | |
279 | ||
280 | #define I_TAG_DECL(node) \ | |
281 | (I_TAG_BINDING(node) ? I_TAG_BINDING(node)->decl : 0) | |
282 | ||
283 | /* This flag is set on an identifier if we have previously asked the | |
284 | binding oracle for this identifier's label binding. */ | |
285 | #define I_LABEL_CHECKED(node) \ | |
286 | (TREE_LANG_FLAG_6 (IDENTIFIER_NODE_CHECK (node))) | |
287 | ||
288 | static inline struct c_binding ** | |
289 | i_label_binding (tree node) | |
290 | { | |
291 | struct lang_identifier *lid | |
292 | = (struct lang_identifier *) IDENTIFIER_NODE_CHECK (node); | |
293 | ||
294 | if (lid->label_binding == NULL | |
295 | && c_binding_oracle != NULL | |
296 | && !I_LABEL_CHECKED (node)) | |
297 | { | |
298 | /* Set the "checked" flag first, to avoid infinite recursion | |
299 | when the binding oracle calls back into gcc. */ | |
300 | I_LABEL_CHECKED (node) = 1; | |
301 | c_binding_oracle (C_ORACLE_LABEL, node); | |
302 | } | |
303 | ||
304 | return &lid->label_binding; | |
305 | } | |
306 | ||
307 | #define I_LABEL_BINDING(node) (*i_label_binding (node)) | |
308 | ||
309 | #define I_LABEL_DECL(node) \ | |
310 | (I_LABEL_BINDING(node) ? I_LABEL_BINDING(node)->decl : 0) | |
311 | ||
18d5f982 ZW |
312 | /* The resulting tree type. */ |
313 | ||
d1b38208 | 314 | union GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"), |
56300785 | 315 | chain_next ("(union lang_tree_node *) c_tree_chain_next (&%h.generic)"))) lang_tree_node |
d1b38208 | 316 | { |
18d5f982 ZW |
317 | union tree_node GTY ((tag ("0"), |
318 | desc ("tree_node_structure (&%h)"))) | |
319 | generic; | |
320 | struct lang_identifier GTY ((tag ("1"))) identifier; | |
321 | }; | |
322 | ||
e1b7793c ILT |
323 | /* Track bindings and other things that matter for goto warnings. For |
324 | efficiency, we do not gather all the decls at the point of | |
325 | definition. Instead, we point into the bindings structure. As | |
326 | scopes are popped, we update these structures and gather the decls | |
327 | that matter at that time. */ | |
328 | ||
329 | struct GTY(()) c_spot_bindings { | |
330 | /* The currently open scope which holds bindings defined when the | |
331 | label was defined or the goto statement was found. */ | |
332 | struct c_scope *scope; | |
333 | /* The bindings in the scope field which were defined at the point | |
334 | of the label or goto. This lets us look at older or newer | |
335 | bindings in the scope, as appropriate. */ | |
336 | struct c_binding *bindings_in_scope; | |
337 | /* The number of statement expressions that have started since this | |
338 | label or goto statement was defined. This is zero if we are at | |
339 | the same statement expression level. It is positive if we are in | |
340 | a statement expression started since this spot. It is negative | |
341 | if this spot was in a statement expression and we have left | |
342 | it. */ | |
343 | int stmt_exprs; | |
344 | /* Whether we started in a statement expression but are no longer in | |
345 | it. This is set to true if stmt_exprs ever goes negative. */ | |
346 | bool left_stmt_expr; | |
347 | }; | |
348 | ||
349 | /* This structure is used to keep track of bindings seen when a goto | |
350 | statement is defined. This is only used if we see the goto | |
351 | statement before we see the label. */ | |
352 | ||
353 | struct GTY(()) c_goto_bindings { | |
354 | /* The location of the goto statement. */ | |
355 | location_t loc; | |
356 | /* The bindings of the goto statement. */ | |
357 | struct c_spot_bindings goto_bindings; | |
358 | }; | |
359 | ||
360 | typedef struct c_goto_bindings *c_goto_bindings_p; | |
e1b7793c ILT |
361 | |
362 | /* The additional information we keep track of for a label binding. | |
363 | These fields are updated as scopes are popped. */ | |
364 | ||
365 | struct GTY(()) c_label_vars { | |
366 | /* The shadowed c_label_vars, when one label shadows another (which | |
367 | can only happen using a __label__ declaration). */ | |
368 | struct c_label_vars *shadowed; | |
369 | /* The bindings when the label was defined. */ | |
370 | struct c_spot_bindings label_bindings; | |
371 | /* A list of decls that we care about: decls about which we should | |
372 | warn if a goto branches to this label from later in the function. | |
373 | Decls are added to this list as scopes are popped. We only add | |
374 | the decls that matter. */ | |
9771b263 | 375 | vec<tree, va_gc> *decls_in_scope; |
e1b7793c ILT |
376 | /* A list of goto statements to this label. This is only used for |
377 | goto statements seen before the label was defined, so that we can | |
378 | issue appropriate warnings for them. */ | |
9771b263 | 379 | vec<c_goto_bindings_p, va_gc> *gotos; |
e1b7793c ILT |
380 | }; |
381 | ||
f75fbaf7 ZW |
382 | /* Each c_scope structure describes the complete contents of one |
383 | scope. Four scopes are distinguished specially: the innermost or | |
384 | current scope, the innermost function scope, the file scope (always | |
385 | the second to outermost) and the outermost or external scope. | |
f91f41b2 ZW |
386 | |
387 | Most declarations are recorded in the current scope. | |
388 | ||
389 | All normal label declarations are recorded in the innermost | |
390 | function scope, as are bindings of undeclared identifiers to | |
391 | error_mark_node. (GCC permits nested functions as an extension, | |
392 | hence the 'innermost' qualifier.) Explicitly declared labels | |
393 | (using the __label__ extension) appear in the current scope. | |
394 | ||
f75fbaf7 | 395 | Being in the file scope (current_scope == file_scope) causes |
f91f41b2 ZW |
396 | special behavior in several places below. Also, under some |
397 | conditions the Objective-C front end records declarations in the | |
f75fbaf7 ZW |
398 | file scope even though that isn't the current scope. |
399 | ||
400 | All declarations with external linkage are recorded in the external | |
401 | scope, even if they aren't visible there; this models the fact that | |
402 | such declarations are visible to the entire program, and (with a | |
403 | bit of cleverness, see pushdecl) allows diagnosis of some violations | |
404 | of C99 6.2.2p7 and 6.2.7p2: | |
405 | ||
406 | If, within the same translation unit, the same identifier appears | |
407 | with both internal and external linkage, the behavior is | |
408 | undefined. | |
f91f41b2 | 409 | |
f75fbaf7 ZW |
410 | All declarations that refer to the same object or function shall |
411 | have compatible type; otherwise, the behavior is undefined. | |
412 | ||
413 | Initially only the built-in declarations, which describe compiler | |
414 | intrinsic functions plus a subset of the standard library, are in | |
415 | this scope. | |
416 | ||
417 | The order of the blocks list matters, and it is frequently appended | |
418 | to. To avoid having to walk all the way to the end of the list on | |
419 | each insertion, or reverse the list later, we maintain a pointer to | |
420 | the last list entry. (FIXME: It should be feasible to use a reversed | |
421 | list here.) | |
422 | ||
423 | The bindings list is strictly in reverse order of declarations; | |
424 | pop_scope relies on this. */ | |
f91f41b2 | 425 | |
51e29401 | 426 | |
d1b38208 | 427 | struct GTY((chain_next ("%h.outer"))) c_scope { |
14077d68 ZW |
428 | /* The scope containing this one. */ |
429 | struct c_scope *outer; | |
430 | ||
431 | /* The next outermost function scope. */ | |
432 | struct c_scope *outer_function; | |
433 | ||
f75fbaf7 ZW |
434 | /* All bindings in this scope. */ |
435 | struct c_binding *bindings; | |
14077d68 ZW |
436 | |
437 | /* For each scope (except the global one), a chain of BLOCK nodes | |
438 | for all the scopes that were entered and exited one level down. */ | |
439 | tree blocks; | |
f91f41b2 | 440 | tree blocks_last; |
14077d68 | 441 | |
f75fbaf7 ZW |
442 | /* The depth of this scope. Used to keep the ->shadowed chain of |
443 | bindings sorted innermost to outermost. */ | |
444 | unsigned int depth : 28; | |
445 | ||
14077d68 ZW |
446 | /* True if we are currently filling this scope with parameter |
447 | declarations. */ | |
1c62e7b2 | 448 | BOOL_BITFIELD parm_flag : 1; |
14077d68 | 449 | |
52ffd86e MS |
450 | /* True if we saw [*] in this scope. Used to give an error messages |
451 | if these appears in a function definition. */ | |
452 | BOOL_BITFIELD had_vla_unspec : 1; | |
453 | ||
55d54003 ZW |
454 | /* True if we already complained about forward parameter decls |
455 | in this scope. This prevents double warnings on | |
456 | foo (int a; int b; ...) */ | |
1c62e7b2 | 457 | BOOL_BITFIELD warned_forward_parm_decls : 1; |
55d54003 | 458 | |
14077d68 ZW |
459 | /* True if this is the outermost block scope of a function body. |
460 | This scope contains the parameters, the local variables declared | |
461 | in the outermost block, and all the labels (except those in | |
462 | nested functions, or declared at block scope with __label__). */ | |
1c62e7b2 | 463 | BOOL_BITFIELD function_body : 1; |
14077d68 ZW |
464 | |
465 | /* True means make a BLOCK for this scope no matter what. */ | |
1c62e7b2 | 466 | BOOL_BITFIELD keep : 1; |
6ec637a4 JJ |
467 | |
468 | /* True means that an unsuffixed float constant is _Decimal64. */ | |
469 | BOOL_BITFIELD float_const_decimal64 : 1; | |
e1b7793c ILT |
470 | |
471 | /* True if this scope has any label bindings. This is used to speed | |
472 | up searching for labels when popping scopes, particularly since | |
473 | labels are normally only found at function scope. */ | |
474 | BOOL_BITFIELD has_label_bindings : 1; | |
744f0946 ILT |
475 | |
476 | /* True if we should issue a warning if a goto statement crosses any | |
477 | of the bindings. We still need to check the list of bindings to | |
478 | find the specific ones we need to warn about. This is true if | |
479 | decl_jump_unsafe would return true for any of the bindings. This | |
480 | is used to avoid looping over all the bindings unnecessarily. */ | |
481 | BOOL_BITFIELD has_jump_unsafe_decl : 1; | |
14077d68 | 482 | }; |
51e29401 | 483 | |
f8521984 | 484 | /* The scope currently in effect. */ |
6645c3fa | 485 | |
f8521984 | 486 | static GTY(()) struct c_scope *current_scope; |
51e29401 | 487 | |
14e33ee8 ZW |
488 | /* The innermost function scope. Ordinary (not explicitly declared) |
489 | labels, bindings to error_mark_node, and the lazily-created | |
490 | bindings of __func__ and its friends get this scope. */ | |
14077d68 | 491 | |
f8521984 | 492 | static GTY(()) struct c_scope *current_function_scope; |
14e33ee8 | 493 | |
f75fbaf7 ZW |
494 | /* The C file scope. This is reset for each input translation unit. */ |
495 | ||
496 | static GTY(()) struct c_scope *file_scope; | |
497 | ||
498 | /* The outermost scope. This is used for all declarations with | |
499 | external linkage, and only these, hence the name. */ | |
500 | ||
501 | static GTY(()) struct c_scope *external_scope; | |
502 | ||
503 | /* A chain of c_scope structures awaiting reuse. */ | |
504 | ||
1431042e | 505 | static GTY((deletable)) struct c_scope *scope_freelist; |
f75fbaf7 ZW |
506 | |
507 | /* A chain of c_binding structures awaiting reuse. */ | |
51e29401 | 508 | |
1431042e | 509 | static GTY((deletable)) struct c_binding *binding_freelist; |
51e29401 | 510 | |
3d93cdfa | 511 | /* Append VAR to LIST in scope SCOPE. */ |
f91f41b2 ZW |
512 | #define SCOPE_LIST_APPEND(scope, list, decl) do { \ |
513 | struct c_scope *s_ = (scope); \ | |
514 | tree d_ = (decl); \ | |
515 | if (s_->list##_last) \ | |
87caf699 | 516 | BLOCK_CHAIN (s_->list##_last) = d_; \ |
f91f41b2 ZW |
517 | else \ |
518 | s_->list = d_; \ | |
519 | s_->list##_last = d_; \ | |
520 | } while (0) | |
521 | ||
522 | /* Concatenate FROM in scope FSCOPE onto TO in scope TSCOPE. */ | |
523 | #define SCOPE_LIST_CONCAT(tscope, to, fscope, from) do { \ | |
524 | struct c_scope *t_ = (tscope); \ | |
525 | struct c_scope *f_ = (fscope); \ | |
526 | if (t_->to##_last) \ | |
87caf699 | 527 | BLOCK_CHAIN (t_->to##_last) = f_->from; \ |
f91f41b2 ZW |
528 | else \ |
529 | t_->to = f_->from; \ | |
530 | t_->to##_last = f_->from##_last; \ | |
531 | } while (0) | |
532 | ||
991d6621 JM |
533 | /* A c_inline_static structure stores details of a static identifier |
534 | referenced in a definition of a function that may be an inline | |
535 | definition if no subsequent declaration of that function uses | |
536 | "extern" or does not use "inline". */ | |
537 | ||
538 | struct GTY((chain_next ("%h.next"))) c_inline_static { | |
539 | /* The location for a diagnostic. */ | |
540 | location_t location; | |
541 | ||
542 | /* The function that may be an inline definition. */ | |
543 | tree function; | |
544 | ||
545 | /* The object or function referenced. */ | |
546 | tree static_decl; | |
547 | ||
548 | /* What sort of reference this is. */ | |
549 | enum c_inline_static_type type; | |
550 | ||
551 | /* The next such structure or NULL. */ | |
552 | struct c_inline_static *next; | |
553 | }; | |
554 | ||
555 | /* List of static identifiers used or referenced in functions that may | |
556 | be inline definitions. */ | |
557 | static GTY(()) struct c_inline_static *c_inline_statics; | |
558 | ||
f8521984 | 559 | /* True means unconditionally make a BLOCK for the next scope pushed. */ |
51e29401 | 560 | |
14e33ee8 | 561 | static bool keep_next_level_flag; |
51e29401 | 562 | |
f75fbaf7 | 563 | /* True means the next call to push_scope will be the outermost scope |
a8ccdffe ZW |
564 | of a function body, so do not push a new scope, merely cease |
565 | expecting parameter decls. */ | |
6645c3fa | 566 | |
a8ccdffe | 567 | static bool next_is_function_body; |
51e29401 | 568 | |
9771b263 | 569 | /* A vector of pointers to c_binding structures. */ |
dc491a25 ILT |
570 | |
571 | typedef struct c_binding *c_binding_ptr; | |
dc491a25 ILT |
572 | |
573 | /* Information that we keep for a struct or union while it is being | |
574 | parsed. */ | |
575 | ||
576 | struct c_struct_parse_info | |
577 | { | |
578 | /* If warn_cxx_compat, a list of types defined within this | |
579 | struct. */ | |
bf4fa671 | 580 | auto_vec<tree> struct_types; |
dc491a25 ILT |
581 | /* If warn_cxx_compat, a list of field names which have bindings, |
582 | and which are defined in this struct, but which are not defined | |
583 | in any enclosing struct. This is used to clear the in_struct | |
584 | field of the c_bindings structure. */ | |
bf4fa671 | 585 | auto_vec<c_binding_ptr> fields; |
dc491a25 ILT |
586 | /* If warn_cxx_compat, a list of typedef names used when defining |
587 | fields in this struct. */ | |
bf4fa671 | 588 | auto_vec<tree> typedefs_seen; |
dc491a25 ILT |
589 | }; |
590 | ||
591 | /* Information for the struct or union currently being parsed, or | |
592 | NULL if not parsing a struct or union. */ | |
593 | static struct c_struct_parse_info *struct_parse_info; | |
594 | ||
51e29401 | 595 | /* Forward declarations. */ |
f75fbaf7 | 596 | static tree lookup_name_in_scope (tree, struct c_scope *); |
c2255bc4 | 597 | static tree c_make_fname_decl (location_t, tree, int); |
deb176fa JM |
598 | static tree grokdeclarator (const struct c_declarator *, |
599 | struct c_declspecs *, | |
928c19bb JM |
600 | enum decl_context, bool, tree *, tree *, tree *, |
601 | bool *, enum deprecated_states); | |
f8893e47 | 602 | static tree grokparms (struct c_arg_info *, bool); |
35b1a6fa | 603 | static void layout_array_type (tree); |
35aff4fb MP |
604 | static void warn_defaults_to (location_t, int, const char *, ...) |
605 | ATTRIBUTE_GCC_DIAG(3,4); | |
51e29401 | 606 | \f |
ed3d0b14 ILT |
607 | /* T is a statement. Add it to the statement-tree. This is the |
608 | C/ObjC version--C++ has a slightly different version of this | |
609 | function. */ | |
610 | ||
611 | tree | |
612 | add_stmt (tree t) | |
613 | { | |
614 | enum tree_code code = TREE_CODE (t); | |
615 | ||
07beea0d | 616 | if (CAN_HAVE_LOCATION_P (t) && code != LABEL_EXPR) |
ed3d0b14 ILT |
617 | { |
618 | if (!EXPR_HAS_LOCATION (t)) | |
619 | SET_EXPR_LOCATION (t, input_location); | |
620 | } | |
621 | ||
622 | if (code == LABEL_EXPR || code == CASE_LABEL_EXPR) | |
623 | STATEMENT_LIST_HAS_LABEL (cur_stmt_list) = 1; | |
624 | ||
625 | /* Add T to the statement-tree. Non-side-effect statements need to be | |
626 | recorded during statement expressions. */ | |
38e01f9e NF |
627 | if (!building_stmt_list_p ()) |
628 | push_stmt_list (); | |
ed3d0b14 ILT |
629 | append_to_statement_list_force (t, &cur_stmt_list); |
630 | ||
631 | return t; | |
632 | } | |
412cd719 TG |
633 | \f |
634 | /* Build a pointer type using the default pointer mode. */ | |
635 | ||
636 | static tree | |
637 | c_build_pointer_type (tree to_type) | |
638 | { | |
639 | addr_space_t as = to_type == error_mark_node? ADDR_SPACE_GENERIC | |
640 | : TYPE_ADDR_SPACE (to_type); | |
ef4bddc2 | 641 | machine_mode pointer_mode; |
412cd719 TG |
642 | |
643 | if (as != ADDR_SPACE_GENERIC || c_default_pointer_mode == VOIDmode) | |
644 | pointer_mode = targetm.addr_space.pointer_mode (as); | |
645 | else | |
646 | pointer_mode = c_default_pointer_mode; | |
647 | return build_pointer_type_for_mode (to_type, pointer_mode, false); | |
648 | } | |
649 | ||
ed3d0b14 | 650 | \f |
744f0946 ILT |
651 | /* Return true if we will want to say something if a goto statement |
652 | crosses DECL. */ | |
653 | ||
654 | static bool | |
655 | decl_jump_unsafe (tree decl) | |
656 | { | |
b504a918 | 657 | if (error_operand_p (decl)) |
744f0946 ILT |
658 | return false; |
659 | ||
660 | /* Always warn about crossing variably modified types. */ | |
0ae9bd27 | 661 | if ((VAR_P (decl) || TREE_CODE (decl) == TYPE_DECL) |
744f0946 ILT |
662 | && variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) |
663 | return true; | |
664 | ||
665 | /* Otherwise, only warn if -Wgoto-misses-init and this is an | |
666 | initialized automatic decl. */ | |
667 | if (warn_jump_misses_init | |
0ae9bd27 | 668 | && VAR_P (decl) |
744f0946 ILT |
669 | && !TREE_STATIC (decl) |
670 | && DECL_INITIAL (decl) != NULL_TREE) | |
671 | return true; | |
672 | ||
673 | return false; | |
674 | } | |
675 | \f | |
e23bd218 | 676 | |
51e29401 | 677 | void |
35b1a6fa | 678 | c_print_identifier (FILE *file, tree node, int indent) |
51e29401 | 679 | { |
ddc8de03 PM |
680 | void (*save) (enum c_oracle_request, tree identifier); |
681 | ||
682 | /* Temporarily hide any binding oracle. Without this, calls to | |
683 | debug_tree from the debugger will end up calling into the oracle, | |
684 | making for a confusing debug session. As the oracle isn't needed | |
685 | here for normal operation, it's simplest to suppress it. */ | |
686 | save = c_binding_oracle; | |
687 | c_binding_oracle = NULL; | |
688 | ||
f75fbaf7 ZW |
689 | print_node (file, "symbol", I_SYMBOL_DECL (node), indent + 4); |
690 | print_node (file, "tag", I_TAG_DECL (node), indent + 4); | |
691 | print_node (file, "label", I_LABEL_DECL (node), indent + 4); | |
eea1139b | 692 | if (C_IS_RESERVED_WORD (node) && C_RID_CODE (node) != RID_CXX_COMPAT_WARN) |
0e5921e8 ZW |
693 | { |
694 | tree rid = ridpointers[C_RID_CODE (node)]; | |
695 | indent_to (file, indent + 4); | |
edb89024 | 696 | fprintf (file, "rid " HOST_PTR_PRINTF " \"%s\"", |
75b6f3fd | 697 | (void *) rid, IDENTIFIER_POINTER (rid)); |
0e5921e8 | 698 | } |
ddc8de03 PM |
699 | |
700 | c_binding_oracle = save; | |
51e29401 | 701 | } |
f75fbaf7 ZW |
702 | |
703 | /* Establish a binding between NAME, an IDENTIFIER_NODE, and DECL, | |
704 | which may be any of several kinds of DECL or TYPE or error_mark_node, | |
705 | in the scope SCOPE. */ | |
706 | static void | |
b3f27c15 JJ |
707 | bind (tree name, tree decl, struct c_scope *scope, bool invisible, |
708 | bool nested, location_t locus) | |
f75fbaf7 ZW |
709 | { |
710 | struct c_binding *b, **here; | |
711 | ||
712 | if (binding_freelist) | |
713 | { | |
714 | b = binding_freelist; | |
715 | binding_freelist = b->prev; | |
716 | } | |
717 | else | |
766090c2 | 718 | b = ggc_alloc<c_binding> (); |
f75fbaf7 ZW |
719 | |
720 | b->shadowed = 0; | |
721 | b->decl = decl; | |
722 | b->id = name; | |
9aaabf8a ZW |
723 | b->depth = scope->depth; |
724 | b->invisible = invisible; | |
725 | b->nested = nested; | |
0b410f0b | 726 | b->inner_comp = 0; |
dc491a25 | 727 | b->in_struct = 0; |
b3f27c15 | 728 | b->locus = locus; |
0b410f0b | 729 | |
e1b7793c | 730 | b->u.type = NULL; |
f75fbaf7 ZW |
731 | |
732 | b->prev = scope->bindings; | |
733 | scope->bindings = b; | |
734 | ||
744f0946 ILT |
735 | if (decl_jump_unsafe (decl)) |
736 | scope->has_jump_unsafe_decl = 1; | |
737 | ||
f75fbaf7 ZW |
738 | if (!name) |
739 | return; | |
740 | ||
741 | switch (TREE_CODE (decl)) | |
742 | { | |
743 | case LABEL_DECL: here = &I_LABEL_BINDING (name); break; | |
744 | case ENUMERAL_TYPE: | |
745 | case UNION_TYPE: | |
746 | case RECORD_TYPE: here = &I_TAG_BINDING (name); break; | |
747 | case VAR_DECL: | |
748 | case FUNCTION_DECL: | |
749 | case TYPE_DECL: | |
750 | case CONST_DECL: | |
751 | case PARM_DECL: | |
752 | case ERROR_MARK: here = &I_SYMBOL_BINDING (name); break; | |
753 | ||
754 | default: | |
366de0ce | 755 | gcc_unreachable (); |
f75fbaf7 ZW |
756 | } |
757 | ||
758 | /* Locate the appropriate place in the chain of shadowed decls | |
759 | to insert this binding. Normally, scope == current_scope and | |
760 | this does nothing. */ | |
9aaabf8a | 761 | while (*here && (*here)->depth > scope->depth) |
f75fbaf7 ZW |
762 | here = &(*here)->shadowed; |
763 | ||
764 | b->shadowed = *here; | |
765 | *here = b; | |
766 | } | |
767 | ||
768 | /* Clear the binding structure B, stick it on the binding_freelist, | |
769 | and return the former value of b->prev. This is used by pop_scope | |
770 | and get_parm_info to iterate destructively over all the bindings | |
771 | from a given scope. */ | |
772 | static struct c_binding * | |
773 | free_binding_and_advance (struct c_binding *b) | |
774 | { | |
775 | struct c_binding *prev = b->prev; | |
776 | ||
9aaabf8a | 777 | memset (b, 0, sizeof (struct c_binding)); |
f75fbaf7 ZW |
778 | b->prev = binding_freelist; |
779 | binding_freelist = b; | |
780 | ||
781 | return prev; | |
782 | } | |
783 | ||
e1b7793c ILT |
784 | /* Bind a label. Like bind, but skip fields which aren't used for |
785 | labels, and add the LABEL_VARS value. */ | |
786 | static void | |
787 | bind_label (tree name, tree label, struct c_scope *scope, | |
788 | struct c_label_vars *label_vars) | |
789 | { | |
790 | struct c_binding *b; | |
791 | ||
792 | bind (name, label, scope, /*invisible=*/false, /*nested=*/false, | |
793 | UNKNOWN_LOCATION); | |
794 | ||
795 | scope->has_label_bindings = true; | |
796 | ||
797 | b = scope->bindings; | |
798 | gcc_assert (b->decl == label); | |
799 | label_vars->shadowed = b->u.label; | |
800 | b->u.label = label_vars; | |
801 | } | |
51e29401 | 802 | \f |
b4892310 | 803 | /* Hook called at end of compilation to assume 1 elt |
f8521984 | 804 | for a file-scope tentative array defn that wasn't complete before. */ |
6645c3fa | 805 | |
b4892310 | 806 | void |
35b1a6fa | 807 | c_finish_incomplete_decl (tree decl) |
b4892310 | 808 | { |
0ae9bd27 | 809 | if (VAR_P (decl)) |
b4892310 RS |
810 | { |
811 | tree type = TREE_TYPE (decl); | |
5cfac96e RK |
812 | if (type != error_mark_node |
813 | && TREE_CODE (type) == ARRAY_TYPE | |
3f75a254 | 814 | && !DECL_EXTERNAL (decl) |
3fa8871b | 815 | && TYPE_DOMAIN (type) == NULL_TREE) |
b4892310 | 816 | { |
c2255bc4 AH |
817 | warning_at (DECL_SOURCE_LOCATION (decl), |
818 | 0, "array %q+D assumed to have one element", decl); | |
5cfac96e | 819 | |
aab038d5 | 820 | complete_array_type (&TREE_TYPE (decl), NULL_TREE, true); |
b4892310 | 821 | |
156030d3 | 822 | relayout_decl (decl); |
b4892310 RS |
823 | } |
824 | } | |
825 | } | |
826 | \f | |
991d6621 JM |
827 | /* Record that inline function FUNC contains a reference (location |
828 | LOC) to static DECL (file-scope or function-local according to | |
829 | TYPE). */ | |
830 | ||
831 | void | |
832 | record_inline_static (location_t loc, tree func, tree decl, | |
833 | enum c_inline_static_type type) | |
834 | { | |
766090c2 | 835 | c_inline_static *csi = ggc_alloc<c_inline_static> (); |
991d6621 JM |
836 | csi->location = loc; |
837 | csi->function = func; | |
838 | csi->static_decl = decl; | |
839 | csi->type = type; | |
840 | csi->next = c_inline_statics; | |
841 | c_inline_statics = csi; | |
842 | } | |
843 | ||
844 | /* Check for references to static declarations in inline functions at | |
845 | the end of the translation unit and diagnose them if the functions | |
846 | are still inline definitions. */ | |
847 | ||
848 | static void | |
849 | check_inline_statics (void) | |
850 | { | |
851 | struct c_inline_static *csi; | |
852 | for (csi = c_inline_statics; csi; csi = csi->next) | |
853 | { | |
854 | if (DECL_EXTERNAL (csi->function)) | |
855 | switch (csi->type) | |
856 | { | |
857 | case csi_internal: | |
858 | pedwarn (csi->location, 0, | |
859 | "%qD is static but used in inline function %qD " | |
860 | "which is not static", csi->static_decl, csi->function); | |
861 | break; | |
862 | case csi_modifiable: | |
863 | pedwarn (csi->location, 0, | |
864 | "%q+D is static but declared in inline function %qD " | |
865 | "which is not static", csi->static_decl, csi->function); | |
866 | break; | |
867 | default: | |
868 | gcc_unreachable (); | |
869 | } | |
870 | } | |
871 | c_inline_statics = NULL; | |
872 | } | |
873 | \f | |
e1b7793c ILT |
874 | /* Fill in a c_spot_bindings structure. If DEFINING is true, set it |
875 | for the current state, otherwise set it to uninitialized. */ | |
876 | ||
877 | static void | |
878 | set_spot_bindings (struct c_spot_bindings *p, bool defining) | |
879 | { | |
880 | if (defining) | |
881 | { | |
882 | p->scope = current_scope; | |
883 | p->bindings_in_scope = current_scope->bindings; | |
884 | } | |
885 | else | |
886 | { | |
887 | p->scope = NULL; | |
888 | p->bindings_in_scope = NULL; | |
889 | } | |
890 | p->stmt_exprs = 0; | |
891 | p->left_stmt_expr = false; | |
892 | } | |
893 | ||
e1b7793c ILT |
894 | /* Update spot bindings P as we pop out of SCOPE. Return true if we |
895 | should push decls for a label. */ | |
896 | ||
897 | static bool | |
898 | update_spot_bindings (struct c_scope *scope, struct c_spot_bindings *p) | |
899 | { | |
900 | if (p->scope != scope) | |
901 | { | |
902 | /* This label or goto is defined in some other scope, or it is a | |
903 | label which is not yet defined. There is nothing to | |
904 | update. */ | |
905 | return false; | |
906 | } | |
907 | ||
908 | /* Adjust the spot bindings to refer to the bindings already defined | |
909 | in the enclosing scope. */ | |
910 | p->scope = scope->outer; | |
911 | p->bindings_in_scope = p->scope->bindings; | |
912 | ||
913 | return true; | |
914 | } | |
915 | \f | |
264fa2db ZL |
916 | /* The Objective-C front-end often needs to determine the current scope. */ |
917 | ||
918 | void * | |
bc095846 | 919 | objc_get_current_scope (void) |
264fa2db ZL |
920 | { |
921 | return current_scope; | |
922 | } | |
923 | ||
924 | /* The following function is used only by Objective-C. It needs to live here | |
925 | because it accesses the innards of c_scope. */ | |
926 | ||
927 | void | |
928 | objc_mark_locals_volatile (void *enclosing_blk) | |
929 | { | |
930 | struct c_scope *scope; | |
f75fbaf7 | 931 | struct c_binding *b; |
e13e48e7 EC |
932 | |
933 | for (scope = current_scope; | |
264fa2db ZL |
934 | scope && scope != enclosing_blk; |
935 | scope = scope->outer) | |
936 | { | |
f75fbaf7 | 937 | for (b = scope->bindings; b; b = b->prev) |
58393038 | 938 | objc_volatilize_decl (b->decl); |
f75fbaf7 | 939 | |
264fa2db ZL |
940 | /* Do not climb up past the current function. */ |
941 | if (scope->function_body) | |
942 | break; | |
e13e48e7 EC |
943 | } |
944 | } | |
945 | ||
c99c0026 | 946 | /* Return true if we are in the global binding level. */ |
51e29401 | 947 | |
c99c0026 | 948 | bool |
35b1a6fa | 949 | global_bindings_p (void) |
51e29401 | 950 | { |
96703596 | 951 | return current_scope == file_scope; |
51e29401 RS |
952 | } |
953 | ||
954 | void | |
35b1a6fa | 955 | keep_next_level (void) |
51e29401 | 956 | { |
14e33ee8 | 957 | keep_next_level_flag = true; |
51e29401 RS |
958 | } |
959 | ||
6ec637a4 JJ |
960 | /* Set the flag for the FLOAT_CONST_DECIMAL64 pragma being ON. */ |
961 | ||
962 | void | |
963 | set_float_const_decimal64 (void) | |
964 | { | |
965 | current_scope->float_const_decimal64 = true; | |
966 | } | |
967 | ||
968 | /* Clear the flag for the FLOAT_CONST_DECIMAL64 pragma. */ | |
969 | ||
970 | void | |
971 | clear_float_const_decimal64 (void) | |
972 | { | |
973 | current_scope->float_const_decimal64 = false; | |
974 | } | |
975 | ||
976 | /* Return nonzero if an unsuffixed float constant is _Decimal64. */ | |
977 | ||
978 | bool | |
979 | float_const_decimal64_p (void) | |
980 | { | |
981 | return current_scope->float_const_decimal64; | |
982 | } | |
983 | ||
f8521984 | 984 | /* Identify this scope as currently being filled with parameters. */ |
51e29401 RS |
985 | |
986 | void | |
eb1dfbb2 | 987 | declare_parm_level (void) |
51e29401 | 988 | { |
f8521984 | 989 | current_scope->parm_flag = true; |
51e29401 RS |
990 | } |
991 | ||
51e29401 | 992 | void |
f75fbaf7 | 993 | push_scope (void) |
51e29401 | 994 | { |
a8ccdffe | 995 | if (next_is_function_body) |
51e29401 | 996 | { |
339a28b9 ZW |
997 | /* This is the transition from the parameters to the top level |
998 | of the function body. These are the same scope | |
f8521984 | 999 | (C99 6.2.1p4,6) so we do not push another scope structure. |
a8ccdffe ZW |
1000 | next_is_function_body is set only by store_parm_decls, which |
1001 | in turn is called when and only when we are about to | |
1002 | encounter the opening curly brace for the function body. | |
339a28b9 | 1003 | |
a8ccdffe ZW |
1004 | The outermost block of a function always gets a BLOCK node, |
1005 | because the debugging output routines expect that each | |
59e4e217 | 1006 | function has at least one BLOCK. */ |
f8521984 ZW |
1007 | current_scope->parm_flag = false; |
1008 | current_scope->function_body = true; | |
a8ccdffe | 1009 | current_scope->keep = true; |
f8521984 ZW |
1010 | current_scope->outer_function = current_function_scope; |
1011 | current_function_scope = current_scope; | |
14e33ee8 ZW |
1012 | |
1013 | keep_next_level_flag = false; | |
a8ccdffe | 1014 | next_is_function_body = false; |
6ec637a4 JJ |
1015 | |
1016 | /* The FLOAT_CONST_DECIMAL64 pragma applies to nested scopes. */ | |
1017 | if (current_scope->outer) | |
1018 | current_scope->float_const_decimal64 | |
1019 | = current_scope->outer->float_const_decimal64; | |
1020 | else | |
1021 | current_scope->float_const_decimal64 = false; | |
51e29401 | 1022 | } |
339a28b9 ZW |
1023 | else |
1024 | { | |
f75fbaf7 ZW |
1025 | struct c_scope *scope; |
1026 | if (scope_freelist) | |
1027 | { | |
1028 | scope = scope_freelist; | |
1029 | scope_freelist = scope->outer; | |
1030 | } | |
1031 | else | |
766090c2 | 1032 | scope = ggc_cleared_alloc<c_scope> (); |
51e29401 | 1033 | |
6ec637a4 JJ |
1034 | /* The FLOAT_CONST_DECIMAL64 pragma applies to nested scopes. */ |
1035 | if (current_scope) | |
1036 | scope->float_const_decimal64 = current_scope->float_const_decimal64; | |
1037 | else | |
1038 | scope->float_const_decimal64 = false; | |
1039 | ||
f8521984 ZW |
1040 | scope->keep = keep_next_level_flag; |
1041 | scope->outer = current_scope; | |
f75fbaf7 ZW |
1042 | scope->depth = current_scope ? (current_scope->depth + 1) : 0; |
1043 | ||
1044 | /* Check for scope depth overflow. Unlikely (2^28 == 268,435,456) but | |
1045 | possible. */ | |
1046 | if (current_scope && scope->depth == 0) | |
1047 | { | |
1048 | scope->depth--; | |
72c4e4db | 1049 | sorry ("GCC supports only %u nested scopes", scope->depth); |
f75fbaf7 | 1050 | } |
118a3a8b | 1051 | |
f8521984 ZW |
1052 | current_scope = scope; |
1053 | keep_next_level_flag = false; | |
339a28b9 | 1054 | } |
0500d6f9 | 1055 | } |
6645c3fa | 1056 | |
e1b7793c ILT |
1057 | /* This is called when we are leaving SCOPE. For each label defined |
1058 | in SCOPE, add any appropriate decls to its decls_in_scope fields. | |
1059 | These are the decls whose initialization will be skipped by a goto | |
1060 | later in the function. */ | |
1061 | ||
1062 | static void | |
1063 | update_label_decls (struct c_scope *scope) | |
1064 | { | |
1065 | struct c_scope *s; | |
1066 | ||
1067 | s = scope; | |
1068 | while (s != NULL) | |
1069 | { | |
1070 | if (s->has_label_bindings) | |
1071 | { | |
1072 | struct c_binding *b; | |
1073 | ||
1074 | for (b = s->bindings; b != NULL; b = b->prev) | |
1075 | { | |
1076 | struct c_label_vars *label_vars; | |
1077 | struct c_binding *b1; | |
744f0946 | 1078 | bool hjud; |
e1b7793c ILT |
1079 | unsigned int ix; |
1080 | struct c_goto_bindings *g; | |
1081 | ||
1082 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1083 | continue; | |
1084 | label_vars = b->u.label; | |
1085 | ||
1086 | b1 = label_vars->label_bindings.bindings_in_scope; | |
744f0946 ILT |
1087 | if (label_vars->label_bindings.scope == NULL) |
1088 | hjud = false; | |
1089 | else | |
1090 | hjud = label_vars->label_bindings.scope->has_jump_unsafe_decl; | |
e1b7793c ILT |
1091 | if (update_spot_bindings (scope, &label_vars->label_bindings)) |
1092 | { | |
1093 | /* This label is defined in this scope. */ | |
744f0946 | 1094 | if (hjud) |
e1b7793c | 1095 | { |
744f0946 ILT |
1096 | for (; b1 != NULL; b1 = b1->prev) |
1097 | { | |
1098 | /* A goto from later in the function to this | |
1099 | label will never see the initialization | |
1100 | of B1, if any. Save it to issue a | |
1101 | warning if needed. */ | |
1102 | if (decl_jump_unsafe (b1->decl)) | |
9771b263 | 1103 | vec_safe_push(label_vars->decls_in_scope, b1->decl); |
744f0946 | 1104 | } |
e1b7793c ILT |
1105 | } |
1106 | } | |
1107 | ||
1108 | /* Update the bindings of any goto statements associated | |
1109 | with this label. */ | |
9771b263 | 1110 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1111 | update_spot_bindings (scope, &g->goto_bindings); |
1112 | } | |
1113 | } | |
1114 | ||
1115 | /* Don't search beyond the current function. */ | |
1116 | if (s == current_function_scope) | |
1117 | break; | |
1118 | ||
1119 | s = s->outer; | |
1120 | } | |
1121 | } | |
1122 | ||
9affb2c7 ZW |
1123 | /* Set the TYPE_CONTEXT of all of TYPE's variants to CONTEXT. */ |
1124 | ||
1125 | static void | |
1126 | set_type_context (tree type, tree context) | |
1127 | { | |
1128 | for (type = TYPE_MAIN_VARIANT (type); type; | |
1129 | type = TYPE_NEXT_VARIANT (type)) | |
1130 | TYPE_CONTEXT (type) = context; | |
1131 | } | |
1132 | ||
f8521984 | 1133 | /* Exit a scope. Restore the state of the identifier-decl mappings |
f75fbaf7 ZW |
1134 | that were in effect when this scope was entered. Return a BLOCK |
1135 | node containing all the DECLs in this scope that are of interest | |
1136 | to debug info generation. */ | |
51e29401 RS |
1137 | |
1138 | tree | |
f75fbaf7 | 1139 | pop_scope (void) |
51e29401 | 1140 | { |
f91f41b2 | 1141 | struct c_scope *scope = current_scope; |
f75fbaf7 ZW |
1142 | tree block, context, p; |
1143 | struct c_binding *b; | |
9cd51ef6 | 1144 | |
f75fbaf7 ZW |
1145 | bool functionbody = scope->function_body; |
1146 | bool keep = functionbody || scope->keep || scope->bindings; | |
f91f41b2 | 1147 | |
e1b7793c | 1148 | update_label_decls (scope); |
187230a7 | 1149 | |
f91f41b2 ZW |
1150 | /* If appropriate, create a BLOCK to record the decls for the life |
1151 | of this function. */ | |
3fa8871b | 1152 | block = NULL_TREE; |
f91f41b2 ZW |
1153 | if (keep) |
1154 | { | |
1155 | block = make_node (BLOCK); | |
f91f41b2 ZW |
1156 | BLOCK_SUBBLOCKS (block) = scope->blocks; |
1157 | TREE_USED (block) = 1; | |
f91f41b2 | 1158 | |
f75fbaf7 | 1159 | /* In each subblock, record that this is its superior. */ |
87caf699 | 1160 | for (p = scope->blocks; p; p = BLOCK_CHAIN (p)) |
f75fbaf7 | 1161 | BLOCK_SUPERCONTEXT (p) = block; |
f91f41b2 | 1162 | |
3fa8871b | 1163 | BLOCK_VARS (block) = NULL_TREE; |
f75fbaf7 | 1164 | } |
339a28b9 | 1165 | |
f75fbaf7 ZW |
1166 | /* The TYPE_CONTEXTs for all of the tagged types belonging to this |
1167 | scope must be set so that they point to the appropriate | |
1168 | construct, i.e. either to the current FUNCTION_DECL node, or | |
1169 | else to the BLOCK node we just constructed. | |
f91f41b2 | 1170 | |
f75fbaf7 ZW |
1171 | Note that for tagged types whose scope is just the formal |
1172 | parameter list for some function type specification, we can't | |
1173 | properly set their TYPE_CONTEXTs here, because we don't have a | |
1174 | pointer to the appropriate FUNCTION_TYPE node readily available | |
1175 | to us. For those cases, the TYPE_CONTEXTs of the relevant tagged | |
1176 | type nodes get set in `grokdeclarator' as soon as we have created | |
1177 | the FUNCTION_TYPE node which will represent the "scope" for these | |
1178 | "parameter list local" tagged types. */ | |
1179 | if (scope->function_body) | |
1180 | context = current_function_decl; | |
1181 | else if (scope == file_scope) | |
eecec698 | 1182 | { |
e5e391d6 MO |
1183 | tree file_decl |
1184 | = build_translation_unit_decl (get_identifier (main_input_filename)); | |
eecec698 | 1185 | context = file_decl; |
881a5e60 | 1186 | debug_hooks->register_main_translation_unit (file_decl); |
eecec698 | 1187 | } |
f75fbaf7 ZW |
1188 | else |
1189 | context = block; | |
f91f41b2 | 1190 | |
f75fbaf7 ZW |
1191 | /* Clear all bindings in this scope. */ |
1192 | for (b = scope->bindings; b; b = free_binding_and_advance (b)) | |
339a28b9 | 1193 | { |
f75fbaf7 | 1194 | p = b->decl; |
f91f41b2 | 1195 | switch (TREE_CODE (p)) |
14e33ee8 | 1196 | { |
f91f41b2 | 1197 | case LABEL_DECL: |
f75fbaf7 | 1198 | /* Warnings for unused labels, errors for undefined labels. */ |
f91f41b2 | 1199 | if (TREE_USED (p) && !DECL_INITIAL (p)) |
14e33ee8 | 1200 | { |
dee15844 | 1201 | error ("label %q+D used but not defined", p); |
f91f41b2 | 1202 | DECL_INITIAL (p) = error_mark_node; |
14e33ee8 | 1203 | } |
b8698a0f | 1204 | else |
c616e51b MLI |
1205 | warn_for_unused_label (p); |
1206 | ||
f75fbaf7 | 1207 | /* Labels go in BLOCK_VARS. */ |
910ad8de | 1208 | DECL_CHAIN (p) = BLOCK_VARS (block); |
f75fbaf7 | 1209 | BLOCK_VARS (block) = p; |
366de0ce | 1210 | gcc_assert (I_LABEL_BINDING (b->id) == b); |
c22cacf3 | 1211 | I_LABEL_BINDING (b->id) = b->shadowed; |
e1b7793c ILT |
1212 | |
1213 | /* Also pop back to the shadowed label_vars. */ | |
1214 | release_tree_vector (b->u.label->decls_in_scope); | |
1215 | b->u.label = b->u.label->shadowed; | |
c22cacf3 | 1216 | break; |
339a28b9 | 1217 | |
f75fbaf7 ZW |
1218 | case ENUMERAL_TYPE: |
1219 | case UNION_TYPE: | |
1220 | case RECORD_TYPE: | |
9affb2c7 | 1221 | set_type_context (p, context); |
f75fbaf7 ZW |
1222 | |
1223 | /* Types may not have tag-names, in which case the type | |
1224 | appears in the bindings list with b->id NULL. */ | |
1225 | if (b->id) | |
1226 | { | |
366de0ce | 1227 | gcc_assert (I_TAG_BINDING (b->id) == b); |
f75fbaf7 ZW |
1228 | I_TAG_BINDING (b->id) = b->shadowed; |
1229 | } | |
c22cacf3 | 1230 | break; |
339a28b9 | 1231 | |
f91f41b2 | 1232 | case FUNCTION_DECL: |
f75fbaf7 ZW |
1233 | /* Propagate TREE_ADDRESSABLE from nested functions to their |
1234 | containing functions. */ | |
3f75a254 | 1235 | if (!TREE_ASM_WRITTEN (p) |
3fa8871b | 1236 | && DECL_INITIAL (p) != NULL_TREE |
f91f41b2 | 1237 | && TREE_ADDRESSABLE (p) |
3fa8871b | 1238 | && DECL_ABSTRACT_ORIGIN (p) != NULL_TREE |
f91f41b2 ZW |
1239 | && DECL_ABSTRACT_ORIGIN (p) != p) |
1240 | TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (p)) = 1; | |
73aea290 | 1241 | if (!DECL_EXTERNAL (p) |
71113fcd GK |
1242 | && !DECL_INITIAL (p) |
1243 | && scope != file_scope | |
1244 | && scope != external_scope) | |
73aea290 | 1245 | { |
dee15844 | 1246 | error ("nested function %q+D declared but never defined", p); |
73aea290 JM |
1247 | undef_nested_function = true; |
1248 | } | |
71113fcd GK |
1249 | else if (DECL_DECLARED_INLINE_P (p) |
1250 | && TREE_PUBLIC (p) | |
d0728ae0 JJ |
1251 | && !DECL_INITIAL (p)) |
1252 | { | |
1253 | /* C99 6.7.4p6: "a function with external linkage... declared | |
1254 | with an inline function specifier ... shall also be defined | |
1255 | in the same translation unit." */ | |
6bc8a126 | 1256 | if (!flag_gnu89_inline |
1bc5a451 MP |
1257 | && !lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (p)) |
1258 | && scope != external_scope) | |
d0728ae0 JJ |
1259 | pedwarn (input_location, 0, |
1260 | "inline function %q+D declared but never defined", p); | |
1261 | DECL_EXTERNAL (p) = 1; | |
1262 | } | |
71113fcd | 1263 | |
f75fbaf7 | 1264 | goto common_symbol; |
f91f41b2 ZW |
1265 | |
1266 | case VAR_DECL: | |
caf93cb0 | 1267 | /* Warnings for unused variables. */ |
ebfbbdc5 | 1268 | if ((!TREE_USED (p) || !DECL_READ_P (p)) |
f95f80d1 | 1269 | && !TREE_NO_WARNING (p) |
f91f41b2 ZW |
1270 | && !DECL_IN_SYSTEM_HEADER (p) |
1271 | && DECL_NAME (p) | |
f75fbaf7 | 1272 | && !DECL_ARTIFICIAL (p) |
29128154 | 1273 | && scope != file_scope |
c22cacf3 | 1274 | && scope != external_scope) |
ebfbbdc5 JJ |
1275 | { |
1276 | if (!TREE_USED (p)) | |
1277 | warning (OPT_Wunused_variable, "unused variable %q+D", p); | |
1278 | else if (DECL_CONTEXT (p) == current_function_decl) | |
1279 | warning_at (DECL_SOURCE_LOCATION (p), | |
1280 | OPT_Wunused_but_set_variable, | |
1281 | "variable %qD set but not used", p); | |
1282 | } | |
f75fbaf7 | 1283 | |
0b410f0b JM |
1284 | if (b->inner_comp) |
1285 | { | |
dee15844 JM |
1286 | error ("type of array %q+D completed incompatibly with" |
1287 | " implicit initialization", p); | |
0b410f0b JM |
1288 | } |
1289 | ||
a1105617 | 1290 | /* Fall through. */ |
f75fbaf7 ZW |
1291 | case TYPE_DECL: |
1292 | case CONST_DECL: | |
1293 | common_symbol: | |
1294 | /* All of these go in BLOCK_VARS, but only if this is the | |
1295 | binding in the home scope. */ | |
9aaabf8a | 1296 | if (!b->nested) |
f75fbaf7 | 1297 | { |
910ad8de | 1298 | DECL_CHAIN (p) = BLOCK_VARS (block); |
f75fbaf7 ZW |
1299 | BLOCK_VARS (block) = p; |
1300 | } | |
17fe0fdb | 1301 | else if (VAR_OR_FUNCTION_DECL_P (p) && scope != file_scope) |
b3f27c15 JJ |
1302 | { |
1303 | /* For block local externs add a special | |
1304 | DECL_EXTERNAL decl for debug info generation. */ | |
1305 | tree extp = copy_node (p); | |
1306 | ||
1307 | DECL_EXTERNAL (extp) = 1; | |
1308 | TREE_STATIC (extp) = 0; | |
1309 | TREE_PUBLIC (extp) = 1; | |
1310 | DECL_INITIAL (extp) = NULL_TREE; | |
1311 | DECL_LANG_SPECIFIC (extp) = NULL; | |
1312 | DECL_CONTEXT (extp) = current_function_decl; | |
1313 | if (TREE_CODE (p) == FUNCTION_DECL) | |
1314 | { | |
1315 | DECL_RESULT (extp) = NULL_TREE; | |
1316 | DECL_SAVED_TREE (extp) = NULL_TREE; | |
1317 | DECL_STRUCT_FUNCTION (extp) = NULL; | |
1318 | } | |
1319 | if (b->locus != UNKNOWN_LOCATION) | |
1320 | DECL_SOURCE_LOCATION (extp) = b->locus; | |
910ad8de | 1321 | DECL_CHAIN (extp) = BLOCK_VARS (block); |
b3f27c15 JJ |
1322 | BLOCK_VARS (block) = extp; |
1323 | } | |
116f30c3 RG |
1324 | /* If this is the file scope set DECL_CONTEXT of each decl to |
1325 | the TRANSLATION_UNIT_DECL. This makes same_translation_unit_p | |
1326 | work. */ | |
1327 | if (scope == file_scope) | |
9affb2c7 ZW |
1328 | { |
1329 | DECL_CONTEXT (p) = context; | |
116f30c3 RG |
1330 | if (TREE_CODE (p) == TYPE_DECL |
1331 | && TREE_TYPE (p) != error_mark_node) | |
9affb2c7 ZW |
1332 | set_type_context (TREE_TYPE (p), context); |
1333 | } | |
55d54003 | 1334 | |
81fea426 | 1335 | gcc_fallthrough (); |
f75fbaf7 ZW |
1336 | /* Parameters go in DECL_ARGUMENTS, not BLOCK_VARS, and have |
1337 | already been put there by store_parm_decls. Unused- | |
1338 | parameter warnings are handled by function.c. | |
1339 | error_mark_node obviously does not go in BLOCK_VARS and | |
1340 | does not get unused-variable warnings. */ | |
1341 | case PARM_DECL: | |
1342 | case ERROR_MARK: | |
1343 | /* It is possible for a decl not to have a name. We get | |
1344 | here with b->id NULL in this case. */ | |
1345 | if (b->id) | |
f91f41b2 | 1346 | { |
366de0ce | 1347 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 | 1348 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
e1b7793c ILT |
1349 | if (b->shadowed && b->shadowed->u.type) |
1350 | TREE_TYPE (b->shadowed->decl) = b->shadowed->u.type; | |
f91f41b2 ZW |
1351 | } |
1352 | break; | |
f75fbaf7 ZW |
1353 | |
1354 | default: | |
366de0ce | 1355 | gcc_unreachable (); |
f91f41b2 ZW |
1356 | } |
1357 | } | |
339a28b9 | 1358 | |
118a3a8b | 1359 | |
f75fbaf7 ZW |
1360 | /* Dispose of the block that we just made inside some higher level. */ |
1361 | if ((scope->function_body || scope == file_scope) && context) | |
339a28b9 | 1362 | { |
f75fbaf7 ZW |
1363 | DECL_INITIAL (context) = block; |
1364 | BLOCK_SUPERCONTEXT (block) = context; | |
339a28b9 | 1365 | } |
f91f41b2 | 1366 | else if (scope->outer) |
3bf40d18 | 1367 | { |
f91f41b2 ZW |
1368 | if (block) |
1369 | SCOPE_LIST_APPEND (scope->outer, blocks, block); | |
1370 | /* If we did not make a block for the scope just exited, any | |
1371 | blocks made for inner scopes must be carried forward so they | |
1372 | will later become subblocks of something else. */ | |
1373 | else if (scope->blocks) | |
1374 | SCOPE_LIST_CONCAT (scope->outer, blocks, scope, blocks); | |
3bf40d18 | 1375 | } |
51e29401 | 1376 | |
f8521984 | 1377 | /* Pop the current scope, and free the structure for reuse. */ |
f75fbaf7 ZW |
1378 | current_scope = scope->outer; |
1379 | if (scope->function_body) | |
1380 | current_function_scope = scope->outer_function; | |
1381 | ||
1382 | memset (scope, 0, sizeof (struct c_scope)); | |
1383 | scope->outer = scope_freelist; | |
1384 | scope_freelist = scope; | |
51e29401 | 1385 | |
51e29401 RS |
1386 | return block; |
1387 | } | |
3bf40d18 | 1388 | |
f75fbaf7 ZW |
1389 | void |
1390 | push_file_scope (void) | |
1391 | { | |
1392 | tree decl; | |
f75fbaf7 | 1393 | |
f6bf7bb6 AP |
1394 | if (file_scope) |
1395 | return; | |
1396 | ||
f75fbaf7 ZW |
1397 | push_scope (); |
1398 | file_scope = current_scope; | |
1399 | ||
1400 | start_fname_decls (); | |
1401 | ||
910ad8de | 1402 | for (decl = visible_builtins; decl; decl = DECL_CHAIN (decl)) |
9aaabf8a | 1403 | bind (DECL_NAME (decl), decl, file_scope, |
b3f27c15 | 1404 | /*invisible=*/false, /*nested=*/true, DECL_SOURCE_LOCATION (decl)); |
f75fbaf7 ZW |
1405 | } |
1406 | ||
1407 | void | |
1408 | pop_file_scope (void) | |
1409 | { | |
1410 | /* In case there were missing closebraces, get us back to the global | |
1411 | binding level. */ | |
1412 | while (current_scope != file_scope) | |
1413 | pop_scope (); | |
1414 | ||
1415 | /* __FUNCTION__ is defined at file scope (""). This | |
1416 | call may not be necessary as my tests indicate it | |
1417 | still works without it. */ | |
1418 | finish_fname_decls (); | |
1419 | ||
991d6621 JM |
1420 | check_inline_statics (); |
1421 | ||
36c1b0de ZW |
1422 | /* This is the point to write out a PCH if we're doing that. |
1423 | In that case we do not want to do anything else. */ | |
f75fbaf7 | 1424 | if (pch_file) |
36c1b0de ZW |
1425 | { |
1426 | c_common_write_pch (); | |
6b5b4e9c JJ |
1427 | /* Ensure even the callers don't try to finalize the CU. */ |
1428 | flag_syntax_only = 1; | |
36c1b0de ZW |
1429 | return; |
1430 | } | |
f75fbaf7 | 1431 | |
36c1b0de | 1432 | /* Pop off the file scope and close this translation unit. */ |
f75fbaf7 ZW |
1433 | pop_scope (); |
1434 | file_scope = 0; | |
bedb9fc0 RH |
1435 | |
1436 | maybe_apply_pending_pragma_weaks (); | |
f75fbaf7 | 1437 | } |
e1b7793c ILT |
1438 | \f |
1439 | /* Adjust the bindings for the start of a statement expression. */ | |
1440 | ||
1441 | void | |
1442 | c_bindings_start_stmt_expr (struct c_spot_bindings* switch_bindings) | |
1443 | { | |
1444 | struct c_scope *scope; | |
1445 | ||
1446 | for (scope = current_scope; scope != NULL; scope = scope->outer) | |
1447 | { | |
1448 | struct c_binding *b; | |
1449 | ||
1450 | if (!scope->has_label_bindings) | |
1451 | continue; | |
1452 | ||
1453 | for (b = scope->bindings; b != NULL; b = b->prev) | |
1454 | { | |
1455 | struct c_label_vars *label_vars; | |
1456 | unsigned int ix; | |
1457 | struct c_goto_bindings *g; | |
1458 | ||
1459 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1460 | continue; | |
1461 | label_vars = b->u.label; | |
1462 | ++label_vars->label_bindings.stmt_exprs; | |
9771b263 | 1463 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1464 | ++g->goto_bindings.stmt_exprs; |
1465 | } | |
1466 | } | |
1467 | ||
1468 | if (switch_bindings != NULL) | |
1469 | ++switch_bindings->stmt_exprs; | |
1470 | } | |
1471 | ||
1472 | /* Adjust the bindings for the end of a statement expression. */ | |
1473 | ||
1474 | void | |
1475 | c_bindings_end_stmt_expr (struct c_spot_bindings *switch_bindings) | |
1476 | { | |
1477 | struct c_scope *scope; | |
1478 | ||
1479 | for (scope = current_scope; scope != NULL; scope = scope->outer) | |
1480 | { | |
1481 | struct c_binding *b; | |
1482 | ||
1483 | if (!scope->has_label_bindings) | |
1484 | continue; | |
1485 | ||
1486 | for (b = scope->bindings; b != NULL; b = b->prev) | |
1487 | { | |
1488 | struct c_label_vars *label_vars; | |
1489 | unsigned int ix; | |
1490 | struct c_goto_bindings *g; | |
1491 | ||
1492 | if (TREE_CODE (b->decl) != LABEL_DECL) | |
1493 | continue; | |
1494 | label_vars = b->u.label; | |
1495 | --label_vars->label_bindings.stmt_exprs; | |
1496 | if (label_vars->label_bindings.stmt_exprs < 0) | |
1497 | { | |
1498 | label_vars->label_bindings.left_stmt_expr = true; | |
1499 | label_vars->label_bindings.stmt_exprs = 0; | |
1500 | } | |
9771b263 | 1501 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
1502 | { |
1503 | --g->goto_bindings.stmt_exprs; | |
1504 | if (g->goto_bindings.stmt_exprs < 0) | |
1505 | { | |
1506 | g->goto_bindings.left_stmt_expr = true; | |
1507 | g->goto_bindings.stmt_exprs = 0; | |
1508 | } | |
1509 | } | |
1510 | } | |
1511 | } | |
f75fbaf7 | 1512 | |
e1b7793c ILT |
1513 | if (switch_bindings != NULL) |
1514 | { | |
1515 | --switch_bindings->stmt_exprs; | |
1516 | gcc_assert (switch_bindings->stmt_exprs >= 0); | |
1517 | } | |
1518 | } | |
51e29401 | 1519 | \f |
51e29401 RS |
1520 | /* Push a definition or a declaration of struct, union or enum tag "name". |
1521 | "type" should be the type node. | |
c2255bc4 AH |
1522 | We assume that the tag "name" is not already defined, and has a location |
1523 | of LOC. | |
51e29401 RS |
1524 | |
1525 | Note that the definition may really be just a forward reference. | |
1526 | In that case, the TYPE_SIZE will be zero. */ | |
1527 | ||
f75fbaf7 | 1528 | static void |
c2255bc4 | 1529 | pushtag (location_t loc, tree name, tree type) |
51e29401 | 1530 | { |
14077d68 | 1531 | /* Record the identifier as the type's name if it has none. */ |
f75fbaf7 ZW |
1532 | if (name && !TYPE_NAME (type)) |
1533 | TYPE_NAME (type) = name; | |
24b97832 | 1534 | bind (name, type, current_scope, /*invisible=*/false, /*nested=*/false, loc); |
c138f328 | 1535 | |
51e29401 | 1536 | /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE will be the |
f8521984 | 1537 | tagged type we just added to the current scope. This fake |
51e29401 | 1538 | NULL-named TYPE_DECL node helps dwarfout.c to know when it needs |
858a47b1 | 1539 | to output a representation of a tagged type, and it also gives |
51e29401 RS |
1540 | us a convenient place to record the "scope start" address for the |
1541 | tagged type. */ | |
1542 | ||
c2255bc4 AH |
1543 | TYPE_STUB_DECL (type) = pushdecl (build_decl (loc, |
1544 | TYPE_DECL, NULL_TREE, type)); | |
88dad228 JM |
1545 | |
1546 | /* An approximation for now, so we can tell this is a function-scope tag. | |
f75fbaf7 | 1547 | This will be updated in pop_scope. */ |
88dad228 | 1548 | TYPE_CONTEXT (type) = DECL_CONTEXT (TYPE_STUB_DECL (type)); |
7e5487a2 ILT |
1549 | |
1550 | if (warn_cxx_compat && name != NULL_TREE) | |
1551 | { | |
1552 | struct c_binding *b = I_SYMBOL_BINDING (name); | |
1553 | ||
1554 | if (b != NULL | |
1555 | && b->decl != NULL_TREE | |
1556 | && TREE_CODE (b->decl) == TYPE_DECL | |
1557 | && (B_IN_CURRENT_SCOPE (b) | |
1558 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
1559 | && (TYPE_MAIN_VARIANT (TREE_TYPE (b->decl)) | |
1560 | != TYPE_MAIN_VARIANT (type))) | |
1561 | { | |
bb85aa74 MP |
1562 | if (warning_at (loc, OPT_Wc___compat, |
1563 | ("using %qD as both a typedef and a tag is " | |
1564 | "invalid in C++"), b->decl) | |
1565 | && b->locus != UNKNOWN_LOCATION) | |
7e5487a2 ILT |
1566 | inform (b->locus, "originally defined here"); |
1567 | } | |
1568 | } | |
51e29401 | 1569 | } |
ddc8de03 PM |
1570 | |
1571 | /* An exported interface to pushtag. This is used by the gdb plugin's | |
1572 | binding oracle to introduce a new tag binding. */ | |
1573 | ||
1574 | void | |
1575 | c_pushtag (location_t loc, tree name, tree type) | |
1576 | { | |
1577 | pushtag (loc, name, type); | |
1578 | } | |
1579 | ||
1580 | /* An exported interface to bind a declaration. LOC is the location | |
1581 | to use. DECL is the declaration to bind. The decl's name is used | |
1582 | to determine how it is bound. If DECL is a VAR_DECL, then | |
1583 | IS_GLOBAL determines whether the decl is put into the global (file | |
1584 | and external) scope or the current function's scope; if DECL is not | |
1585 | a VAR_DECL then it is always put into the file scope. */ | |
1586 | ||
1587 | void | |
1588 | c_bind (location_t loc, tree decl, bool is_global) | |
1589 | { | |
1590 | struct c_scope *scope; | |
1591 | bool nested = false; | |
1592 | ||
0ae9bd27 | 1593 | if (!VAR_P (decl) || current_function_scope == NULL) |
ddc8de03 PM |
1594 | { |
1595 | /* Types and functions are always considered to be global. */ | |
1596 | scope = file_scope; | |
1597 | DECL_EXTERNAL (decl) = 1; | |
1598 | TREE_PUBLIC (decl) = 1; | |
1599 | } | |
1600 | else if (is_global) | |
1601 | { | |
1602 | /* Also bind it into the external scope. */ | |
1603 | bind (DECL_NAME (decl), decl, external_scope, true, false, loc); | |
1604 | nested = true; | |
1605 | scope = file_scope; | |
1606 | DECL_EXTERNAL (decl) = 1; | |
1607 | TREE_PUBLIC (decl) = 1; | |
1608 | } | |
1609 | else | |
1610 | { | |
1611 | DECL_CONTEXT (decl) = current_function_decl; | |
1612 | TREE_PUBLIC (decl) = 0; | |
1613 | scope = current_function_scope; | |
1614 | } | |
1615 | ||
1616 | bind (DECL_NAME (decl), decl, scope, false, nested, loc); | |
1617 | } | |
51e29401 | 1618 | \f |
3c6e6fbf | 1619 | /* Subroutine of compare_decls. Allow harmless mismatches in return |
6907ddd3 RS |
1620 | and argument types provided that the type modes match. This function |
1621 | return a unified type given a suitable match, and 0 otherwise. */ | |
1622 | ||
1623 | static tree | |
3c6e6fbf | 1624 | match_builtin_function_types (tree newtype, tree oldtype) |
6907ddd3 RS |
1625 | { |
1626 | tree newrettype, oldrettype; | |
1627 | tree newargs, oldargs; | |
1628 | tree trytype, tryargs; | |
1629 | ||
1630 | /* Accept the return type of the new declaration if same modes. */ | |
1631 | oldrettype = TREE_TYPE (oldtype); | |
1632 | newrettype = TREE_TYPE (newtype); | |
1633 | ||
1634 | if (TYPE_MODE (oldrettype) != TYPE_MODE (newrettype)) | |
6574d78e | 1635 | return NULL_TREE; |
6907ddd3 RS |
1636 | |
1637 | oldargs = TYPE_ARG_TYPES (oldtype); | |
1638 | newargs = TYPE_ARG_TYPES (newtype); | |
1639 | tryargs = newargs; | |
1640 | ||
1641 | while (oldargs || newargs) | |
1642 | { | |
3f75a254 JM |
1643 | if (!oldargs |
1644 | || !newargs | |
1645 | || !TREE_VALUE (oldargs) | |
1646 | || !TREE_VALUE (newargs) | |
6907ddd3 RS |
1647 | || TYPE_MODE (TREE_VALUE (oldargs)) |
1648 | != TYPE_MODE (TREE_VALUE (newargs))) | |
6574d78e | 1649 | return NULL_TREE; |
6907ddd3 RS |
1650 | |
1651 | oldargs = TREE_CHAIN (oldargs); | |
1652 | newargs = TREE_CHAIN (newargs); | |
1653 | } | |
1654 | ||
1655 | trytype = build_function_type (newrettype, tryargs); | |
b8fd7909 JM |
1656 | |
1657 | /* Allow declaration to change transaction_safe attribute. */ | |
1658 | tree oldattrs = TYPE_ATTRIBUTES (oldtype); | |
1659 | tree oldtsafe = lookup_attribute ("transaction_safe", oldattrs); | |
1660 | tree newattrs = TYPE_ATTRIBUTES (newtype); | |
1661 | tree newtsafe = lookup_attribute ("transaction_safe", newattrs); | |
1662 | if (oldtsafe && !newtsafe) | |
1663 | oldattrs = remove_attribute ("transaction_safe", oldattrs); | |
1664 | else if (newtsafe && !oldtsafe) | |
1665 | oldattrs = tree_cons (get_identifier ("transaction_safe"), | |
1666 | NULL_TREE, oldattrs); | |
1667 | ||
1668 | return build_type_attribute_variant (trytype, oldattrs); | |
6907ddd3 RS |
1669 | } |
1670 | ||
1f52178b | 1671 | /* Subroutine of diagnose_mismatched_decls. Check for function type |
3c6e6fbf | 1672 | mismatch involving an empty arglist vs a nonempty one and give clearer |
9ac97460 | 1673 | diagnostics. */ |
3c6e6fbf ZW |
1674 | static void |
1675 | diagnose_arglist_conflict (tree newdecl, tree olddecl, | |
1676 | tree newtype, tree oldtype) | |
1677 | { | |
1678 | tree t; | |
51e29401 | 1679 | |
3c6e6fbf | 1680 | if (TREE_CODE (olddecl) != FUNCTION_DECL |
132da1a5 | 1681 | || !comptypes (TREE_TYPE (oldtype), TREE_TYPE (newtype)) |
3fa8871b MP |
1682 | || !((!prototype_p (oldtype) && DECL_INITIAL (olddecl) == NULL_TREE) |
1683 | || (!prototype_p (newtype) && DECL_INITIAL (newdecl) == NULL_TREE))) | |
3c6e6fbf | 1684 | return; |
bf44f7de | 1685 | |
3c6e6fbf | 1686 | t = TYPE_ARG_TYPES (oldtype); |
3fa8871b | 1687 | if (t == NULL_TREE) |
3c6e6fbf ZW |
1688 | t = TYPE_ARG_TYPES (newtype); |
1689 | for (; t; t = TREE_CHAIN (t)) | |
1690 | { | |
1691 | tree type = TREE_VALUE (t); | |
51e29401 | 1692 | |
3fa8871b | 1693 | if (TREE_CHAIN (t) == NULL_TREE |
3c6e6fbf ZW |
1694 | && TYPE_MAIN_VARIANT (type) != void_type_node) |
1695 | { | |
1f5b3869 | 1696 | inform (input_location, "a parameter list with an ellipsis can%'t match " |
3c6e6fbf ZW |
1697 | "an empty parameter name list declaration"); |
1698 | break; | |
1699 | } | |
1700 | ||
1701 | if (c_type_promotes_to (type) != type) | |
1702 | { | |
1f5b3869 | 1703 | inform (input_location, "an argument type that has a default promotion can%'t match " |
3c6e6fbf ZW |
1704 | "an empty parameter name list declaration"); |
1705 | break; | |
1706 | } | |
1707 | } | |
1708 | } | |
51e29401 | 1709 | |
3c6e6fbf ZW |
1710 | /* Another subroutine of diagnose_mismatched_decls. OLDDECL is an |
1711 | old-style function definition, NEWDECL is a prototype declaration. | |
1712 | Diagnose inconsistencies in the argument list. Returns TRUE if | |
1713 | the prototype is compatible, FALSE if not. */ | |
1714 | static bool | |
1715 | validate_proto_after_old_defn (tree newdecl, tree newtype, tree oldtype) | |
1716 | { | |
bc298aa7 ZW |
1717 | tree newargs, oldargs; |
1718 | int i; | |
1719 | ||
2c83be0c | 1720 | #define END_OF_ARGLIST(t) ((t) == void_type_node) |
bc298aa7 ZW |
1721 | |
1722 | oldargs = TYPE_ACTUAL_ARG_TYPES (oldtype); | |
1723 | newargs = TYPE_ARG_TYPES (newtype); | |
1724 | i = 1; | |
1725 | ||
1726 | for (;;) | |
9162542e | 1727 | { |
ffc44ab6 VR |
1728 | tree oldargtype = TREE_VALUE (oldargs); |
1729 | tree newargtype = TREE_VALUE (newargs); | |
1730 | ||
1731 | if (oldargtype == error_mark_node || newargtype == error_mark_node) | |
1732 | return false; | |
1733 | ||
267bac10 JM |
1734 | oldargtype = (TYPE_ATOMIC (oldargtype) |
1735 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (oldargtype), | |
1736 | TYPE_QUAL_ATOMIC) | |
1737 | : TYPE_MAIN_VARIANT (oldargtype)); | |
1738 | newargtype = (TYPE_ATOMIC (newargtype) | |
1739 | ? c_build_qualified_type (TYPE_MAIN_VARIANT (newargtype), | |
1740 | TYPE_QUAL_ATOMIC) | |
1741 | : TYPE_MAIN_VARIANT (newargtype)); | |
bc298aa7 ZW |
1742 | |
1743 | if (END_OF_ARGLIST (oldargtype) && END_OF_ARGLIST (newargtype)) | |
1744 | break; | |
1745 | ||
1746 | /* Reaching the end of just one list means the two decls don't | |
1747 | agree on the number of arguments. */ | |
1748 | if (END_OF_ARGLIST (oldargtype)) | |
9162542e | 1749 | { |
dee15844 JM |
1750 | error ("prototype for %q+D declares more arguments " |
1751 | "than previous old-style definition", newdecl); | |
bc298aa7 | 1752 | return false; |
9162542e | 1753 | } |
bc298aa7 | 1754 | else if (END_OF_ARGLIST (newargtype)) |
3c6e6fbf | 1755 | { |
dee15844 JM |
1756 | error ("prototype for %q+D declares fewer arguments " |
1757 | "than previous old-style definition", newdecl); | |
3c6e6fbf ZW |
1758 | return false; |
1759 | } | |
bc298aa7 ZW |
1760 | |
1761 | /* Type for passing arg must be consistent with that declared | |
1762 | for the arg. */ | |
3f75a254 | 1763 | else if (!comptypes (oldargtype, newargtype)) |
3c6e6fbf | 1764 | { |
dee15844 | 1765 | error ("prototype for %q+D declares argument %d" |
40b97a2e | 1766 | " with incompatible type", |
dee15844 | 1767 | newdecl, i); |
3c6e6fbf ZW |
1768 | return false; |
1769 | } | |
bc298aa7 ZW |
1770 | |
1771 | oldargs = TREE_CHAIN (oldargs); | |
1772 | newargs = TREE_CHAIN (newargs); | |
1773 | i++; | |
9162542e | 1774 | } |
bc298aa7 ZW |
1775 | |
1776 | /* If we get here, no errors were found, but do issue a warning | |
1777 | for this poor-style construct. */ | |
dee15844 JM |
1778 | warning (0, "prototype for %q+D follows non-prototype definition", |
1779 | newdecl); | |
bc298aa7 ZW |
1780 | return true; |
1781 | #undef END_OF_ARGLIST | |
3c6e6fbf | 1782 | } |
4b4e3407 | 1783 | |
3c6e6fbf ZW |
1784 | /* Subroutine of diagnose_mismatched_decls. Report the location of DECL, |
1785 | first in a pair of mismatched declarations, using the diagnostic | |
1786 | function DIAG. */ | |
1787 | static void | |
71205d17 | 1788 | locate_old_decl (tree decl) |
3c6e6fbf | 1789 | { |
0c249d4b DD |
1790 | if (TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl) |
1791 | && !C_DECL_DECLARED_BUILTIN (decl)) | |
3c6e6fbf ZW |
1792 | ; |
1793 | else if (DECL_INITIAL (decl)) | |
1f5b3869 | 1794 | inform (input_location, "previous definition of %q+D was here", decl); |
3c6e6fbf | 1795 | else if (C_DECL_IMPLICIT (decl)) |
1f5b3869 | 1796 | inform (input_location, "previous implicit declaration of %q+D was here", decl); |
3c6e6fbf | 1797 | else |
1f5b3869 | 1798 | inform (input_location, "previous declaration of %q+D was here", decl); |
3c6e6fbf | 1799 | } |
51e29401 | 1800 | |
3c6e6fbf ZW |
1801 | /* Subroutine of duplicate_decls. Compare NEWDECL to OLDDECL. |
1802 | Returns true if the caller should proceed to merge the two, false | |
1803 | if OLDDECL should simply be discarded. As a side effect, issues | |
1804 | all necessary diagnostics for invalid or poor-style combinations. | |
1805 | If it returns true, writes the types of NEWDECL and OLDDECL to | |
1806 | *NEWTYPEP and *OLDTYPEP - these may have been adjusted from | |
1807 | TREE_TYPE (NEWDECL, OLDDECL) respectively. */ | |
1808 | ||
1809 | static bool | |
1810 | diagnose_mismatched_decls (tree newdecl, tree olddecl, | |
1811 | tree *newtypep, tree *oldtypep) | |
1812 | { | |
1813 | tree newtype, oldtype; | |
1814 | bool pedwarned = false; | |
1815 | bool warned = false; | |
f8f5c4b3 | 1816 | bool retval = true; |
3c6e6fbf | 1817 | |
6663ee3b EC |
1818 | #define DECL_EXTERN_INLINE(DECL) (DECL_DECLARED_INLINE_P (DECL) \ |
1819 | && DECL_EXTERNAL (DECL)) | |
1820 | ||
3c6e6fbf ZW |
1821 | /* If we have error_mark_node for either decl or type, just discard |
1822 | the previous decl - we're in an error cascade already. */ | |
1823 | if (olddecl == error_mark_node || newdecl == error_mark_node) | |
1824 | return false; | |
bc298aa7 ZW |
1825 | *oldtypep = oldtype = TREE_TYPE (olddecl); |
1826 | *newtypep = newtype = TREE_TYPE (newdecl); | |
3c6e6fbf ZW |
1827 | if (oldtype == error_mark_node || newtype == error_mark_node) |
1828 | return false; | |
1829 | ||
1830 | /* Two different categories of symbol altogether. This is an error | |
1831 | unless OLDDECL is a builtin. OLDDECL will be discarded in any case. */ | |
51e29401 RS |
1832 | if (TREE_CODE (olddecl) != TREE_CODE (newdecl)) |
1833 | { | |
f75fbaf7 ZW |
1834 | if (!(TREE_CODE (olddecl) == FUNCTION_DECL |
1835 | && DECL_BUILT_IN (olddecl) | |
1836 | && !C_DECL_DECLARED_BUILTIN (olddecl))) | |
51e29401 | 1837 | { |
dee15844 | 1838 | error ("%q+D redeclared as different kind of symbol", newdecl); |
71205d17 | 1839 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
1840 | } |
1841 | else if (TREE_PUBLIC (newdecl)) | |
ff1ff960 PC |
1842 | warning (OPT_Wbuiltin_declaration_mismatch, |
1843 | "built-in function %q+D declared as non-function", | |
dee15844 | 1844 | newdecl); |
44c21c7f | 1845 | else |
dee15844 JM |
1846 | warning (OPT_Wshadow, "declaration of %q+D shadows " |
1847 | "a built-in function", newdecl); | |
3c6e6fbf ZW |
1848 | return false; |
1849 | } | |
1850 | ||
085e33aa JM |
1851 | /* Enumerators have no linkage, so may only be declared once in a |
1852 | given scope. */ | |
1853 | if (TREE_CODE (olddecl) == CONST_DECL) | |
1854 | { | |
dee15844 | 1855 | error ("redeclaration of enumerator %q+D", newdecl); |
71205d17 | 1856 | locate_old_decl (olddecl); |
085e33aa JM |
1857 | return false; |
1858 | } | |
1859 | ||
132da1a5 | 1860 | if (!comptypes (oldtype, newtype)) |
3c6e6fbf | 1861 | { |
a6f78652 | 1862 | if (TREE_CODE (olddecl) == FUNCTION_DECL |
f75fbaf7 | 1863 | && DECL_BUILT_IN (olddecl) && !C_DECL_DECLARED_BUILTIN (olddecl)) |
3c6e6fbf ZW |
1864 | { |
1865 | /* Accept harmless mismatch in function types. | |
1866 | This is for the ffs and fprintf builtins. */ | |
1867 | tree trytype = match_builtin_function_types (newtype, oldtype); | |
1868 | ||
132da1a5 | 1869 | if (trytype && comptypes (newtype, trytype)) |
bc298aa7 | 1870 | *oldtypep = oldtype = trytype; |
3c6e6fbf | 1871 | else |
51e29401 | 1872 | { |
3c6e6fbf ZW |
1873 | /* If types don't match for a built-in, throw away the |
1874 | built-in. No point in calling locate_old_decl here, it | |
9ac97460 | 1875 | won't print anything. */ |
48330c93 BE |
1876 | warning (OPT_Wbuiltin_declaration_mismatch, |
1877 | "conflicting types for built-in function %q+D", | |
dee15844 | 1878 | newdecl); |
3c6e6fbf | 1879 | return false; |
51e29401 | 1880 | } |
3c6e6fbf ZW |
1881 | } |
1882 | else if (TREE_CODE (olddecl) == FUNCTION_DECL | |
3c20847b | 1883 | && DECL_IS_BUILTIN (olddecl)) |
3c6e6fbf ZW |
1884 | { |
1885 | /* A conflicting function declaration for a predeclared | |
1886 | function that isn't actually built in. Objective C uses | |
1887 | these. The new declaration silently overrides everything | |
1888 | but the volatility (i.e. noreturn) indication. See also | |
1889 | below. FIXME: Make Objective C use normal builtins. */ | |
1890 | TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl); | |
1891 | return false; | |
1892 | } | |
1893 | /* Permit void foo (...) to match int foo (...) if the latter is | |
1894 | the definition and implicit int was used. See | |
1895 | c-torture/compile/920625-2.c. */ | |
1896 | else if (TREE_CODE (newdecl) == FUNCTION_DECL && DECL_INITIAL (newdecl) | |
1897 | && TYPE_MAIN_VARIANT (TREE_TYPE (oldtype)) == void_type_node | |
1898 | && TYPE_MAIN_VARIANT (TREE_TYPE (newtype)) == integer_type_node | |
12869142 | 1899 | && C_FUNCTION_IMPLICIT_INT (newdecl) && !DECL_INITIAL (olddecl)) |
3c6e6fbf | 1900 | { |
509c9d60 MLI |
1901 | pedwarned = pedwarn (input_location, 0, |
1902 | "conflicting types for %q+D", newdecl); | |
3c6e6fbf | 1903 | /* Make sure we keep void as the return type. */ |
bc298aa7 | 1904 | TREE_TYPE (newdecl) = *newtypep = newtype = oldtype; |
3c6e6fbf | 1905 | C_FUNCTION_IMPLICIT_INT (newdecl) = 0; |
51e29401 | 1906 | } |
12869142 DJ |
1907 | /* Permit void foo (...) to match an earlier call to foo (...) with |
1908 | no declared type (thus, implicitly int). */ | |
1909 | else if (TREE_CODE (newdecl) == FUNCTION_DECL | |
1910 | && TYPE_MAIN_VARIANT (TREE_TYPE (newtype)) == void_type_node | |
1911 | && TYPE_MAIN_VARIANT (TREE_TYPE (oldtype)) == integer_type_node | |
1912 | && C_DECL_IMPLICIT (olddecl) && !DECL_INITIAL (olddecl)) | |
1913 | { | |
509c9d60 MLI |
1914 | pedwarned = pedwarn (input_location, 0, |
1915 | "conflicting types for %q+D", newdecl); | |
12869142 DJ |
1916 | /* Make sure we keep void as the return type. */ |
1917 | TREE_TYPE (olddecl) = *oldtypep = oldtype = newtype; | |
12869142 | 1918 | } |
51e29401 RS |
1919 | else |
1920 | { | |
36c5e70a BE |
1921 | int new_quals = TYPE_QUALS (newtype); |
1922 | int old_quals = TYPE_QUALS (oldtype); | |
1923 | ||
1924 | if (new_quals != old_quals) | |
1925 | { | |
1926 | addr_space_t new_addr = DECODE_QUAL_ADDR_SPACE (new_quals); | |
1927 | addr_space_t old_addr = DECODE_QUAL_ADDR_SPACE (old_quals); | |
1928 | if (new_addr != old_addr) | |
1929 | { | |
1930 | if (ADDR_SPACE_GENERIC_P (new_addr)) | |
1931 | error ("conflicting named address spaces (generic vs %s) " | |
1932 | "for %q+D", | |
1933 | c_addr_space_name (old_addr), newdecl); | |
1934 | else if (ADDR_SPACE_GENERIC_P (old_addr)) | |
1935 | error ("conflicting named address spaces (%s vs generic) " | |
1936 | "for %q+D", | |
1937 | c_addr_space_name (new_addr), newdecl); | |
1938 | else | |
1939 | error ("conflicting named address spaces (%s vs %s) " | |
1940 | "for %q+D", | |
1941 | c_addr_space_name (new_addr), | |
1942 | c_addr_space_name (old_addr), | |
1943 | newdecl); | |
1944 | } | |
1945 | ||
1946 | if (CLEAR_QUAL_ADDR_SPACE (new_quals) | |
1947 | != CLEAR_QUAL_ADDR_SPACE (old_quals)) | |
1948 | error ("conflicting type qualifiers for %q+D", newdecl); | |
1949 | } | |
118a3a8b | 1950 | else |
dee15844 | 1951 | error ("conflicting types for %q+D", newdecl); |
3c6e6fbf | 1952 | diagnose_arglist_conflict (newdecl, olddecl, newtype, oldtype); |
71205d17 | 1953 | locate_old_decl (olddecl); |
3c6e6fbf | 1954 | return false; |
51e29401 | 1955 | } |
51e29401 RS |
1956 | } |
1957 | ||
3c6e6fbf ZW |
1958 | /* Redeclaration of a type is a constraint violation (6.7.2.3p1), |
1959 | but silently ignore the redeclaration if either is in a system | |
dc5027f4 | 1960 | header. (Conflicting redeclarations were handled above.) This |
48b0b196 | 1961 | is allowed for C11 if the types are the same, not just |
dc5027f4 | 1962 | compatible. */ |
3c6e6fbf | 1963 | if (TREE_CODE (newdecl) == TYPE_DECL) |
339a28b9 | 1964 | { |
dc5027f4 JM |
1965 | bool types_different = false; |
1966 | int comptypes_result; | |
1967 | ||
1968 | comptypes_result | |
1969 | = comptypes_check_different_types (oldtype, newtype, &types_different); | |
1970 | ||
1971 | if (comptypes_result != 1 || types_different) | |
1972 | { | |
1973 | error ("redefinition of typedef %q+D with different type", newdecl); | |
1974 | locate_old_decl (olddecl); | |
1975 | return false; | |
1976 | } | |
1977 | ||
df0ed6c5 RAE |
1978 | if (DECL_IN_SYSTEM_HEADER (newdecl) |
1979 | || DECL_IN_SYSTEM_HEADER (olddecl) | |
1980 | || TREE_NO_WARNING (newdecl) | |
1981 | || TREE_NO_WARNING (olddecl)) | |
a1105617 | 1982 | return true; /* Allow OLDDECL to continue in use. */ |
118a3a8b | 1983 | |
8bf872f9 | 1984 | if (variably_modified_type_p (newtype, NULL)) |
dc5027f4 | 1985 | { |
8bf872f9 JM |
1986 | error ("redefinition of typedef %q+D with variably modified type", |
1987 | newdecl); | |
dc5027f4 JM |
1988 | locate_old_decl (olddecl); |
1989 | } | |
35aff4fb MP |
1990 | else if (pedwarn_c99 (input_location, OPT_Wpedantic, |
1991 | "redefinition of typedef %q+D", newdecl)) | |
1992 | locate_old_decl (olddecl); | |
dc5027f4 JM |
1993 | |
1994 | return true; | |
339a28b9 | 1995 | } |
51e29401 | 1996 | |
3c6e6fbf ZW |
1997 | /* Function declarations can either be 'static' or 'extern' (no |
1998 | qualifier is equivalent to 'extern' - C99 6.2.2p5) and therefore | |
71113fcd GK |
1999 | can never conflict with each other on account of linkage |
2000 | (6.2.2p4). Multiple definitions are not allowed (6.9p3,5) but | |
2001 | gnu89 mode permits two definitions if one is 'extern inline' and | |
2002 | one is not. The non- extern-inline definition supersedes the | |
2003 | extern-inline definition. */ | |
6663ee3b | 2004 | |
3c6e6fbf | 2005 | else if (TREE_CODE (newdecl) == FUNCTION_DECL) |
51e29401 | 2006 | { |
04b8f97f ZW |
2007 | /* If you declare a built-in function name as static, or |
2008 | define the built-in with an old-style definition (so we | |
2009 | can't validate the argument list) the built-in definition is | |
2010 | overridden, but optionally warn this was a bad choice of name. */ | |
2011 | if (DECL_BUILT_IN (olddecl) | |
f75fbaf7 | 2012 | && !C_DECL_DECLARED_BUILTIN (olddecl) |
04b8f97f ZW |
2013 | && (!TREE_PUBLIC (newdecl) |
2014 | || (DECL_INITIAL (newdecl) | |
f4da8dce | 2015 | && !prototype_p (TREE_TYPE (newdecl))))) |
51e29401 | 2016 | { |
dee15844 JM |
2017 | warning (OPT_Wshadow, "declaration of %q+D shadows " |
2018 | "a built-in function", newdecl); | |
51e29401 | 2019 | /* Discard the old built-in function. */ |
3c6e6fbf | 2020 | return false; |
51e29401 | 2021 | } |
118a3a8b | 2022 | |
3c6e6fbf | 2023 | if (DECL_INITIAL (newdecl)) |
4c41bbfa | 2024 | { |
f8f5c4b3 | 2025 | if (DECL_INITIAL (olddecl)) |
6907ddd3 | 2026 | { |
6663ee3b | 2027 | /* If both decls are in the same TU and the new declaration |
619519c8 | 2028 | isn't overriding an extern inline reject the new decl. |
71113fcd GK |
2029 | In c99, no overriding is allowed in the same translation |
2030 | unit. */ | |
2031 | if ((!DECL_EXTERN_INLINE (olddecl) | |
2032 | || DECL_EXTERN_INLINE (newdecl) | |
da1c7394 | 2033 | || (!flag_gnu89_inline |
4eb7fd83 JJ |
2034 | && (!DECL_DECLARED_INLINE_P (olddecl) |
2035 | || !lookup_attribute ("gnu_inline", | |
2036 | DECL_ATTRIBUTES (olddecl))) | |
2037 | && (!DECL_DECLARED_INLINE_P (newdecl) | |
2038 | || !lookup_attribute ("gnu_inline", | |
2039 | DECL_ATTRIBUTES (newdecl)))) | |
4eb7fd83 | 2040 | ) |
f8f5c4b3 AP |
2041 | && same_translation_unit_p (newdecl, olddecl)) |
2042 | { | |
dee15844 | 2043 | error ("redefinition of %q+D", newdecl); |
71205d17 | 2044 | locate_old_decl (olddecl); |
f8f5c4b3 AP |
2045 | return false; |
2046 | } | |
6663ee3b | 2047 | } |
4c41bbfa | 2048 | } |
3c6e6fbf ZW |
2049 | /* If we have a prototype after an old-style function definition, |
2050 | the argument types must be checked specially. */ | |
2051 | else if (DECL_INITIAL (olddecl) | |
f4da8dce | 2052 | && !prototype_p (oldtype) && prototype_p (newtype) |
3c6e6fbf ZW |
2053 | && TYPE_ACTUAL_ARG_TYPES (oldtype) |
2054 | && !validate_proto_after_old_defn (newdecl, newtype, oldtype)) | |
52b6a22f | 2055 | { |
71205d17 | 2056 | locate_old_decl (olddecl); |
3c6e6fbf | 2057 | return false; |
52b6a22f | 2058 | } |
9aaabf8a ZW |
2059 | /* A non-static declaration (even an "extern") followed by a |
2060 | static declaration is undefined behavior per C99 6.2.2p3-5,7. | |
2061 | The same is true for a static forward declaration at block | |
2062 | scope followed by a non-static declaration/definition at file | |
2063 | scope. Static followed by non-static at the same scope is | |
2064 | not undefined behavior, and is the most convenient way to get | |
2065 | some effects (see e.g. what unwind-dw2-fde-glibc.c does to | |
2066 | the definition of _Unwind_Find_FDE in unwind-dw2-fde.c), but | |
8c27b7d4 | 2067 | we do diagnose it if -Wtraditional. */ |
3c6e6fbf | 2068 | if (TREE_PUBLIC (olddecl) && !TREE_PUBLIC (newdecl)) |
51e29401 | 2069 | { |
9aaabf8a ZW |
2070 | /* Two exceptions to the rule. If olddecl is an extern |
2071 | inline, or a predeclared function that isn't actually | |
2072 | built in, newdecl silently overrides olddecl. The latter | |
2073 | occur only in Objective C; see also above. (FIXME: Make | |
2074 | Objective C use normal builtins.) */ | |
2075 | if (!DECL_IS_BUILTIN (olddecl) | |
6663ee3b | 2076 | && !DECL_EXTERN_INLINE (olddecl)) |
3c6e6fbf | 2077 | { |
dee15844 JM |
2078 | error ("static declaration of %q+D follows " |
2079 | "non-static declaration", newdecl); | |
71205d17 | 2080 | locate_old_decl (olddecl); |
3c6e6fbf | 2081 | } |
9aaabf8a | 2082 | return false; |
51e29401 | 2083 | } |
9aaabf8a | 2084 | else if (TREE_PUBLIC (newdecl) && !TREE_PUBLIC (olddecl)) |
e841f997 | 2085 | { |
9aaabf8a ZW |
2086 | if (DECL_CONTEXT (olddecl)) |
2087 | { | |
dee15844 JM |
2088 | error ("non-static declaration of %q+D follows " |
2089 | "static declaration", newdecl); | |
71205d17 | 2090 | locate_old_decl (olddecl); |
9aaabf8a ZW |
2091 | return false; |
2092 | } | |
2093 | else if (warn_traditional) | |
2094 | { | |
b8698a0f | 2095 | warned |= warning (OPT_Wtraditional, |
71205d17 MLI |
2096 | "non-static declaration of %q+D " |
2097 | "follows static declaration", newdecl); | |
9aaabf8a | 2098 | } |
e841f997 | 2099 | } |
4eb7fd83 JJ |
2100 | |
2101 | /* Make sure gnu_inline attribute is either not present, or | |
2102 | present on all inline decls. */ | |
2103 | if (DECL_DECLARED_INLINE_P (olddecl) | |
2104 | && DECL_DECLARED_INLINE_P (newdecl)) | |
2105 | { | |
2106 | bool newa = lookup_attribute ("gnu_inline", | |
2107 | DECL_ATTRIBUTES (newdecl)) != NULL; | |
2108 | bool olda = lookup_attribute ("gnu_inline", | |
2109 | DECL_ATTRIBUTES (olddecl)) != NULL; | |
2110 | if (newa != olda) | |
2111 | { | |
c5d75364 MLI |
2112 | error_at (input_location, "%<gnu_inline%> attribute present on %q+D", |
2113 | newa ? newdecl : olddecl); | |
2114 | error_at (DECL_SOURCE_LOCATION (newa ? olddecl : newdecl), | |
2115 | "but not here"); | |
4eb7fd83 JJ |
2116 | } |
2117 | } | |
51e29401 | 2118 | } |
0ae9bd27 | 2119 | else if (VAR_P (newdecl)) |
339a28b9 | 2120 | { |
3c6e6fbf ZW |
2121 | /* Only variables can be thread-local, and all declarations must |
2122 | agree on this property. */ | |
953ff289 DN |
2123 | if (C_DECL_THREADPRIVATE_P (olddecl) && !DECL_THREAD_LOCAL_P (newdecl)) |
2124 | { | |
2125 | /* Nothing to check. Since OLDDECL is marked threadprivate | |
2126 | and NEWDECL does not have a thread-local attribute, we | |
2127 | will merge the threadprivate attribute into NEWDECL. */ | |
2128 | ; | |
2129 | } | |
2130 | else if (DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)) | |
51e29401 | 2131 | { |
c2f7fa15 | 2132 | if (DECL_THREAD_LOCAL_P (newdecl)) |
dee15844 JM |
2133 | error ("thread-local declaration of %q+D follows " |
2134 | "non-thread-local declaration", newdecl); | |
3c6e6fbf | 2135 | else |
dee15844 JM |
2136 | error ("non-thread-local declaration of %q+D follows " |
2137 | "thread-local declaration", newdecl); | |
51e29401 | 2138 | |
71205d17 | 2139 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
2140 | return false; |
2141 | } | |
51e29401 | 2142 | |
3c6e6fbf ZW |
2143 | /* Multiple initialized definitions are not allowed (6.9p3,5). */ |
2144 | if (DECL_INITIAL (newdecl) && DECL_INITIAL (olddecl)) | |
2145 | { | |
dee15844 | 2146 | error ("redefinition of %q+D", newdecl); |
71205d17 | 2147 | locate_old_decl (olddecl); |
3c6e6fbf ZW |
2148 | return false; |
2149 | } | |
2150 | ||
9aaabf8a ZW |
2151 | /* Objects declared at file scope: if the first declaration had |
2152 | external linkage (even if it was an external reference) the | |
2153 | second must have external linkage as well, or the behavior is | |
2154 | undefined. If the first declaration had internal linkage, then | |
2155 | the second must too, or else be an external reference (in which | |
2156 | case the composite declaration still has internal linkage). | |
2157 | As for function declarations, we warn about the static-then- | |
2158 | extern case only for -Wtraditional. See generally 6.2.2p3-5,7. */ | |
2159 | if (DECL_FILE_SCOPE_P (newdecl) | |
2160 | && TREE_PUBLIC (newdecl) != TREE_PUBLIC (olddecl)) | |
3c6e6fbf | 2161 | { |
9aaabf8a ZW |
2162 | if (DECL_EXTERNAL (newdecl)) |
2163 | { | |
558d1f81 JM |
2164 | if (!DECL_FILE_SCOPE_P (olddecl)) |
2165 | { | |
dee15844 JM |
2166 | error ("extern declaration of %q+D follows " |
2167 | "declaration with no linkage", newdecl); | |
71205d17 | 2168 | locate_old_decl (olddecl); |
558d1f81 JM |
2169 | return false; |
2170 | } | |
2171 | else if (warn_traditional) | |
9aaabf8a | 2172 | { |
b8698a0f | 2173 | warned |= warning (OPT_Wtraditional, |
71205d17 MLI |
2174 | "non-static declaration of %q+D " |
2175 | "follows static declaration", newdecl); | |
9aaabf8a ZW |
2176 | } |
2177 | } | |
2178 | else | |
3c6e6fbf ZW |
2179 | { |
2180 | if (TREE_PUBLIC (newdecl)) | |
dee15844 JM |
2181 | error ("non-static declaration of %q+D follows " |
2182 | "static declaration", newdecl); | |
3c6e6fbf | 2183 | else |
dee15844 JM |
2184 | error ("static declaration of %q+D follows " |
2185 | "non-static declaration", newdecl); | |
3c6e6fbf | 2186 | |
71205d17 | 2187 | locate_old_decl (olddecl); |
3c6e6fbf | 2188 | return false; |
51e29401 RS |
2189 | } |
2190 | } | |
3c6e6fbf ZW |
2191 | /* Two objects with the same name declared at the same block |
2192 | scope must both be external references (6.7p3). */ | |
558d1f81 | 2193 | else if (!DECL_FILE_SCOPE_P (newdecl)) |
3c6e6fbf ZW |
2194 | { |
2195 | if (DECL_EXTERNAL (newdecl)) | |
0b410f0b JM |
2196 | { |
2197 | /* Extern with initializer at block scope, which will | |
2198 | already have received an error. */ | |
2199 | } | |
3c6e6fbf | 2200 | else if (DECL_EXTERNAL (olddecl)) |
0b410f0b | 2201 | { |
dee15844 JM |
2202 | error ("declaration of %q+D with no linkage follows " |
2203 | "extern declaration", newdecl); | |
71205d17 | 2204 | locate_old_decl (olddecl); |
0b410f0b | 2205 | } |
3c6e6fbf | 2206 | else |
0b410f0b | 2207 | { |
dee15844 | 2208 | error ("redeclaration of %q+D with no linkage", newdecl); |
71205d17 | 2209 | locate_old_decl (olddecl); |
0b410f0b | 2210 | } |
ecf92f82 | 2211 | |
3c6e6fbf ZW |
2212 | return false; |
2213 | } | |
7a5d2eb8 ILT |
2214 | |
2215 | /* C++ does not permit a decl to appear multiple times at file | |
2216 | scope. */ | |
2217 | if (warn_cxx_compat | |
2218 | && DECL_FILE_SCOPE_P (newdecl) | |
2219 | && !DECL_EXTERNAL (newdecl) | |
2220 | && !DECL_EXTERNAL (olddecl)) | |
2221 | warned |= warning_at (DECL_SOURCE_LOCATION (newdecl), | |
2222 | OPT_Wc___compat, | |
2223 | ("duplicate declaration of %qD is " | |
2224 | "invalid in C++"), | |
2225 | newdecl); | |
1ae0ccb6 | 2226 | } |
3c6e6fbf ZW |
2227 | |
2228 | /* warnings */ | |
d7afec4b | 2229 | /* All decls must agree on a visibility. */ |
c22cacf3 | 2230 | if (CODE_CONTAINS_STRUCT (TREE_CODE (newdecl), TS_DECL_WITH_VIS) |
820cc88f | 2231 | && DECL_VISIBILITY_SPECIFIED (newdecl) && DECL_VISIBILITY_SPECIFIED (olddecl) |
3c6e6fbf | 2232 | && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl)) |
1ae0ccb6 | 2233 | { |
71205d17 MLI |
2234 | warned |= warning (0, "redeclaration of %q+D with different visibility " |
2235 | "(old visibility preserved)", newdecl); | |
1ae0ccb6 | 2236 | } |
3c6e6fbf ZW |
2237 | |
2238 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
5c3a10fb | 2239 | warned |= diagnose_mismatched_attributes (olddecl, newdecl); |
3205a71e | 2240 | else /* PARM_DECL, VAR_DECL */ |
3c6e6fbf | 2241 | { |
f75fbaf7 ZW |
2242 | /* Redeclaration of a parameter is a constraint violation (this is |
2243 | not explicitly stated, but follows from C99 6.7p3 [no more than | |
2244 | one declaration of the same identifier with no linkage in the | |
2245 | same scope, except type tags] and 6.2.2p6 [parameters have no | |
2246 | linkage]). We must check for a forward parameter declaration, | |
2247 | indicated by TREE_ASM_WRITTEN on the old declaration - this is | |
2248 | an extension, the mandatory diagnostic for which is handled by | |
2249 | mark_forward_parm_decls. */ | |
2250 | ||
3205a71e ZW |
2251 | if (TREE_CODE (newdecl) == PARM_DECL |
2252 | && (!TREE_ASM_WRITTEN (olddecl) || TREE_ASM_WRITTEN (newdecl))) | |
2253 | { | |
dee15844 | 2254 | error ("redefinition of parameter %q+D", newdecl); |
71205d17 | 2255 | locate_old_decl (olddecl); |
3205a71e ZW |
2256 | return false; |
2257 | } | |
51e29401 RS |
2258 | } |
2259 | ||
3c6e6fbf ZW |
2260 | /* Optional warning for completely redundant decls. */ |
2261 | if (!warned && !pedwarned | |
2262 | && warn_redundant_decls | |
2263 | /* Don't warn about a function declaration followed by a | |
2264 | definition. */ | |
3205a71e ZW |
2265 | && !(TREE_CODE (newdecl) == FUNCTION_DECL |
2266 | && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)) | |
8c27b7d4 | 2267 | /* Don't warn about redundant redeclarations of builtins. */ |
c5e36c09 ZW |
2268 | && !(TREE_CODE (newdecl) == FUNCTION_DECL |
2269 | && !DECL_BUILT_IN (newdecl) | |
2270 | && DECL_BUILT_IN (olddecl) | |
2271 | && !C_DECL_DECLARED_BUILTIN (olddecl)) | |
3205a71e ZW |
2272 | /* Don't warn about an extern followed by a definition. */ |
2273 | && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl)) | |
2274 | /* Don't warn about forward parameter decls. */ | |
2275 | && !(TREE_CODE (newdecl) == PARM_DECL | |
52d09157 CR |
2276 | && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)) |
2277 | /* Don't warn about a variable definition following a declaration. */ | |
0ae9bd27 | 2278 | && !(VAR_P (newdecl) |
52d09157 | 2279 | && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl))) |
27f427f8 | 2280 | { |
71205d17 MLI |
2281 | warned = warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D", |
2282 | newdecl); | |
27f427f8 RS |
2283 | } |
2284 | ||
71205d17 | 2285 | /* Report location of previous decl/defn. */ |
3c6e6fbf | 2286 | if (warned || pedwarned) |
71205d17 | 2287 | locate_old_decl (olddecl); |
664b4b1e | 2288 | |
6663ee3b EC |
2289 | #undef DECL_EXTERN_INLINE |
2290 | ||
f8f5c4b3 | 2291 | return retval; |
3c6e6fbf | 2292 | } |
51e29401 | 2293 | |
3c6e6fbf ZW |
2294 | /* Subroutine of duplicate_decls. NEWDECL has been found to be |
2295 | consistent with OLDDECL, but carries new information. Merge the | |
1ef82ef2 | 2296 | new information into OLDDECL. This function issues no |
3c6e6fbf ZW |
2297 | diagnostics. */ |
2298 | ||
2299 | static void | |
1ef82ef2 | 2300 | merge_decls (tree newdecl, tree olddecl, tree newtype, tree oldtype) |
3c6e6fbf | 2301 | { |
71113fcd | 2302 | bool new_is_definition = (TREE_CODE (newdecl) == FUNCTION_DECL |
3fa8871b | 2303 | && DECL_INITIAL (newdecl) != NULL_TREE); |
71113fcd | 2304 | bool new_is_prototype = (TREE_CODE (newdecl) == FUNCTION_DECL |
f4da8dce | 2305 | && prototype_p (TREE_TYPE (newdecl))); |
71113fcd | 2306 | bool old_is_prototype = (TREE_CODE (olddecl) == FUNCTION_DECL |
f4da8dce | 2307 | && prototype_p (TREE_TYPE (olddecl))); |
3c6e6fbf | 2308 | |
f75fbaf7 ZW |
2309 | /* For real parm decl following a forward decl, rechain the old decl |
2310 | in its new location and clear TREE_ASM_WRITTEN (it's not a | |
2311 | forward decl anymore). */ | |
3c6e6fbf | 2312 | if (TREE_CODE (newdecl) == PARM_DECL |
3f75a254 | 2313 | && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)) |
51e29401 | 2314 | { |
f75fbaf7 ZW |
2315 | struct c_binding *b, **here; |
2316 | ||
2317 | for (here = ¤t_scope->bindings; *here; here = &(*here)->prev) | |
2318 | if ((*here)->decl == olddecl) | |
2319 | goto found; | |
366de0ce | 2320 | gcc_unreachable (); |
f75fbaf7 ZW |
2321 | |
2322 | found: | |
2323 | b = *here; | |
2324 | *here = b->prev; | |
2325 | b->prev = current_scope->bindings; | |
2326 | current_scope->bindings = b; | |
2327 | ||
3c6e6fbf | 2328 | TREE_ASM_WRITTEN (olddecl) = 0; |
3c6e6fbf ZW |
2329 | } |
2330 | ||
2331 | DECL_ATTRIBUTES (newdecl) | |
5fd9b178 | 2332 | = targetm.merge_decl_attributes (olddecl, newdecl); |
bf44f7de | 2333 | |
5fde6a45 MP |
2334 | /* For typedefs use the old type, as the new type's DECL_NAME points |
2335 | at newdecl, which will be ggc_freed. */ | |
2336 | if (TREE_CODE (newdecl) == TYPE_DECL) | |
2337 | { | |
2338 | /* But NEWTYPE might have an attribute, honor that. */ | |
2339 | tree tem = newtype; | |
2340 | newtype = oldtype; | |
2341 | ||
2342 | if (TYPE_USER_ALIGN (tem)) | |
2343 | { | |
2344 | if (TYPE_ALIGN (tem) > TYPE_ALIGN (newtype)) | |
fe37c7af | 2345 | SET_TYPE_ALIGN (newtype, TYPE_ALIGN (tem)); |
5fde6a45 MP |
2346 | TYPE_USER_ALIGN (newtype) = true; |
2347 | } | |
2348 | ||
2349 | /* And remove the new type from the variants list. */ | |
2350 | if (TYPE_NAME (TREE_TYPE (newdecl)) == newdecl) | |
2351 | { | |
2352 | tree remove = TREE_TYPE (newdecl); | |
2353 | for (tree t = TYPE_MAIN_VARIANT (remove); ; | |
2354 | t = TYPE_NEXT_VARIANT (t)) | |
2355 | if (TYPE_NEXT_VARIANT (t) == remove) | |
2356 | { | |
2357 | TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (remove); | |
2358 | break; | |
2359 | } | |
2360 | } | |
2361 | } | |
2362 | ||
3c6e6fbf | 2363 | /* Merge the data types specified in the two decls. */ |
1ef82ef2 ZW |
2364 | TREE_TYPE (newdecl) |
2365 | = TREE_TYPE (olddecl) | |
10bc1b1b | 2366 | = composite_type (newtype, oldtype); |
51e29401 | 2367 | |
3c6e6fbf | 2368 | /* Lay the type out, unless already done. */ |
2587f865 | 2369 | if (!comptypes (oldtype, TREE_TYPE (newdecl))) |
3c6e6fbf ZW |
2370 | { |
2371 | if (TREE_TYPE (newdecl) != error_mark_node) | |
2372 | layout_type (TREE_TYPE (newdecl)); | |
2373 | if (TREE_CODE (newdecl) != FUNCTION_DECL | |
2374 | && TREE_CODE (newdecl) != TYPE_DECL | |
2375 | && TREE_CODE (newdecl) != CONST_DECL) | |
2376 | layout_decl (newdecl, 0); | |
2377 | } | |
2378 | else | |
2379 | { | |
2380 | /* Since the type is OLDDECL's, make OLDDECL's size go with. */ | |
2381 | DECL_SIZE (newdecl) = DECL_SIZE (olddecl); | |
2382 | DECL_SIZE_UNIT (newdecl) = DECL_SIZE_UNIT (olddecl); | |
899ca90e | 2383 | SET_DECL_MODE (newdecl, DECL_MODE (olddecl)); |
837edd5f GK |
2384 | if (DECL_ALIGN (olddecl) > DECL_ALIGN (newdecl)) |
2385 | { | |
fe37c7af | 2386 | SET_DECL_ALIGN (newdecl, DECL_ALIGN (olddecl)); |
8220334a | 2387 | DECL_USER_ALIGN (newdecl) |= DECL_USER_ALIGN (olddecl); |
837edd5f | 2388 | } |
00aa1fa2 L |
2389 | if (DECL_WARN_IF_NOT_ALIGN (olddecl) |
2390 | > DECL_WARN_IF_NOT_ALIGN (newdecl)) | |
2391 | SET_DECL_WARN_IF_NOT_ALIGN (newdecl, | |
2392 | DECL_WARN_IF_NOT_ALIGN (olddecl)); | |
3c6e6fbf | 2393 | } |
fc542d3c | 2394 | |
9a60b229 JJ |
2395 | /* Keep the old rtl since we can safely use it. */ |
2396 | if (HAS_RTL_P (olddecl)) | |
2397 | COPY_DECL_RTL (olddecl, newdecl); | |
17aec3eb | 2398 | |
3c6e6fbf ZW |
2399 | /* Merge the type qualifiers. */ |
2400 | if (TREE_READONLY (newdecl)) | |
1ef82ef2 | 2401 | TREE_READONLY (olddecl) = 1; |
facef326 | 2402 | |
3c6e6fbf | 2403 | if (TREE_THIS_VOLATILE (newdecl)) |
ee9f69b4 | 2404 | TREE_THIS_VOLATILE (olddecl) = 1; |
3c6e6fbf | 2405 | |
302a2cc5 JM |
2406 | /* Merge deprecatedness. */ |
2407 | if (TREE_DEPRECATED (newdecl)) | |
2408 | TREE_DEPRECATED (olddecl) = 1; | |
2409 | ||
238fe3c5 RAE |
2410 | /* If a decl is in a system header and the other isn't, keep the one on the |
2411 | system header. Otherwise, keep source location of definition rather than | |
2412 | declaration and of prototype rather than non-prototype unless that | |
2413 | prototype is built-in. */ | |
2414 | if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS) | |
2415 | && DECL_IN_SYSTEM_HEADER (olddecl) | |
2416 | && !DECL_IN_SYSTEM_HEADER (newdecl) ) | |
aa14403d | 2417 | DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl); |
238fe3c5 RAE |
2418 | else if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS) |
2419 | && DECL_IN_SYSTEM_HEADER (newdecl) | |
2420 | && !DECL_IN_SYSTEM_HEADER (olddecl)) | |
aa14403d | 2421 | DECL_SOURCE_LOCATION (olddecl) = DECL_SOURCE_LOCATION (newdecl); |
3fa8871b MP |
2422 | else if ((DECL_INITIAL (newdecl) == NULL_TREE |
2423 | && DECL_INITIAL (olddecl) != NULL_TREE) | |
238fe3c5 RAE |
2424 | || (old_is_prototype && !new_is_prototype |
2425 | && !C_DECL_BUILTIN_PROTOTYPE (olddecl))) | |
3c6e6fbf ZW |
2426 | DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl); |
2427 | ||
3c6e6fbf | 2428 | /* Merge the initialization information. */ |
3fa8871b | 2429 | if (DECL_INITIAL (newdecl) == NULL_TREE) |
3c6e6fbf ZW |
2430 | DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl); |
2431 | ||
953ff289 | 2432 | /* Merge the threadprivate attribute. */ |
0ae9bd27 | 2433 | if (VAR_P (olddecl) && C_DECL_THREADPRIVATE_P (olddecl)) |
5fcffe51 | 2434 | C_DECL_THREADPRIVATE_P (newdecl) = 1; |
953ff289 | 2435 | |
fbbc17c7 MS |
2436 | if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS)) |
2437 | { | |
fbbc17c7 MS |
2438 | /* Copy the assembler name. |
2439 | Currently, it can only be defined in the prototype. */ | |
2440 | COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl); | |
2441 | ||
2442 | /* Use visibility of whichever declaration had it specified */ | |
2443 | if (DECL_VISIBILITY_SPECIFIED (olddecl)) | |
2444 | { | |
2445 | DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl); | |
2446 | DECL_VISIBILITY_SPECIFIED (newdecl) = 1; | |
2447 | } | |
2448 | ||
2449 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2450 | { | |
2451 | DECL_STATIC_CONSTRUCTOR(newdecl) |= DECL_STATIC_CONSTRUCTOR(olddecl); | |
2452 | DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl); | |
2453 | DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl); | |
2454 | DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl) | |
2455 | |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl); | |
2456 | TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl); | |
fbbc17c7 | 2457 | DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl); |
1ea193c2 | 2458 | DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl); |
becfd6e5 KZ |
2459 | TREE_READONLY (newdecl) |= TREE_READONLY (olddecl); |
2460 | DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl); | |
fbbc17c7 MS |
2461 | DECL_IS_NOVOPS (newdecl) |= DECL_IS_NOVOPS (olddecl); |
2462 | } | |
2463 | ||
2464 | /* Merge the storage class information. */ | |
2465 | merge_weak (newdecl, olddecl); | |
2466 | ||
2467 | /* For functions, static overrides non-static. */ | |
2468 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2469 | { | |
2470 | TREE_PUBLIC (newdecl) &= TREE_PUBLIC (olddecl); | |
2471 | /* This is since we don't automatically | |
2472 | copy the attributes of NEWDECL into OLDDECL. */ | |
2473 | TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl); | |
2474 | /* If this clears `static', clear it in the identifier too. */ | |
2475 | if (!TREE_PUBLIC (olddecl)) | |
2476 | TREE_PUBLIC (DECL_NAME (olddecl)) = 0; | |
2477 | } | |
2478 | } | |
2479 | ||
4eb7fd83 JJ |
2480 | /* In c99, 'extern' declaration before (or after) 'inline' means this |
2481 | function is not DECL_EXTERNAL, unless 'gnu_inline' attribute | |
2482 | is present. */ | |
2483 | if (TREE_CODE (newdecl) == FUNCTION_DECL | |
da1c7394 | 2484 | && !flag_gnu89_inline |
4eb7fd83 JJ |
2485 | && (DECL_DECLARED_INLINE_P (newdecl) |
2486 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2487 | && (!DECL_DECLARED_INLINE_P (newdecl) | |
2488 | || !DECL_DECLARED_INLINE_P (olddecl) | |
2489 | || !DECL_EXTERNAL (olddecl)) | |
2490 | && DECL_EXTERNAL (newdecl) | |
6cf59865 | 2491 | && !lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (newdecl)) |
74b0ec7c | 2492 | && !current_function_decl) |
4eb7fd83 | 2493 | DECL_EXTERNAL (newdecl) = 0; |
71113fcd | 2494 | |
6763b9f7 JM |
2495 | /* An inline definition following a static declaration is not |
2496 | DECL_EXTERNAL. */ | |
2497 | if (new_is_definition | |
2498 | && (DECL_DECLARED_INLINE_P (newdecl) | |
2499 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2500 | && !TREE_PUBLIC (olddecl)) | |
2501 | DECL_EXTERNAL (newdecl) = 0; | |
2502 | ||
fbbc17c7 MS |
2503 | if (DECL_EXTERNAL (newdecl)) |
2504 | { | |
2505 | TREE_STATIC (newdecl) = TREE_STATIC (olddecl); | |
2506 | DECL_EXTERNAL (newdecl) = DECL_EXTERNAL (olddecl); | |
2507 | ||
2508 | /* An extern decl does not override previous storage class. */ | |
2509 | TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl); | |
2510 | if (!DECL_EXTERNAL (newdecl)) | |
2511 | { | |
2512 | DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl); | |
2513 | DECL_COMMON (newdecl) = DECL_COMMON (olddecl); | |
2514 | } | |
2515 | } | |
2516 | else | |
2517 | { | |
2518 | TREE_STATIC (olddecl) = TREE_STATIC (newdecl); | |
2519 | TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl); | |
2520 | } | |
2521 | ||
2522 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2523 | { | |
2524 | /* If we're redefining a function previously defined as extern | |
2525 | inline, make sure we emit debug info for the inline before we | |
2526 | throw it away, in case it was inlined into a function that | |
2527 | hasn't been written out yet. */ | |
2528 | if (new_is_definition && DECL_INITIAL (olddecl)) | |
500b9ca1 JJ |
2529 | /* The new defn must not be inline. */ |
2530 | DECL_UNINLINABLE (newdecl) = 1; | |
fbbc17c7 MS |
2531 | else |
2532 | { | |
2533 | /* If either decl says `inline', this fn is inline, unless | |
2534 | its definition was passed already. */ | |
2535 | if (DECL_DECLARED_INLINE_P (newdecl) | |
2536 | || DECL_DECLARED_INLINE_P (olddecl)) | |
2537 | DECL_DECLARED_INLINE_P (newdecl) = 1; | |
2538 | ||
2539 | DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl) | |
2540 | = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)); | |
c536a6a7 RG |
2541 | |
2542 | DECL_DISREGARD_INLINE_LIMITS (newdecl) | |
2543 | = DECL_DISREGARD_INLINE_LIMITS (olddecl) | |
2544 | = (DECL_DISREGARD_INLINE_LIMITS (newdecl) | |
2545 | || DECL_DISREGARD_INLINE_LIMITS (olddecl)); | |
fbbc17c7 MS |
2546 | } |
2547 | ||
2548 | if (DECL_BUILT_IN (olddecl)) | |
2549 | { | |
2550 | /* If redeclaring a builtin function, it stays built in. | |
2551 | But it gets tagged as having been declared. */ | |
2552 | DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl); | |
2553 | DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl); | |
2554 | C_DECL_DECLARED_BUILTIN (newdecl) = 1; | |
2555 | if (new_is_prototype) | |
8b57bfeb JJ |
2556 | { |
2557 | C_DECL_BUILTIN_PROTOTYPE (newdecl) = 0; | |
2558 | if (DECL_BUILT_IN_CLASS (newdecl) == BUILT_IN_NORMAL) | |
e79983f4 MM |
2559 | { |
2560 | enum built_in_function fncode = DECL_FUNCTION_CODE (newdecl); | |
2561 | switch (fncode) | |
2562 | { | |
2563 | /* If a compatible prototype of these builtin functions | |
2564 | is seen, assume the runtime implements it with the | |
2565 | expected semantics. */ | |
2566 | case BUILT_IN_STPCPY: | |
2567 | if (builtin_decl_explicit_p (fncode)) | |
2568 | set_builtin_decl_implicit_p (fncode, true); | |
2569 | break; | |
2570 | default: | |
cbf5d0e7 RB |
2571 | if (builtin_decl_explicit_p (fncode)) |
2572 | set_builtin_decl_declared_p (fncode, true); | |
e79983f4 MM |
2573 | break; |
2574 | } | |
bc1a75dd JJ |
2575 | |
2576 | copy_attributes_to_builtin (newdecl); | |
e79983f4 | 2577 | } |
8b57bfeb | 2578 | } |
fbbc17c7 MS |
2579 | else |
2580 | C_DECL_BUILTIN_PROTOTYPE (newdecl) | |
2581 | = C_DECL_BUILTIN_PROTOTYPE (olddecl); | |
2582 | } | |
2583 | ||
ab442df7 MM |
2584 | /* Preserve function specific target and optimization options */ |
2585 | if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl) | |
2586 | && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl)) | |
2587 | DECL_FUNCTION_SPECIFIC_TARGET (newdecl) | |
2588 | = DECL_FUNCTION_SPECIFIC_TARGET (olddecl); | |
2589 | ||
2590 | if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl) | |
2591 | && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)) | |
2592 | DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl) | |
2593 | = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl); | |
2594 | ||
fbbc17c7 MS |
2595 | /* Also preserve various other info from the definition. */ |
2596 | if (!new_is_definition) | |
2597 | { | |
dcb6e951 | 2598 | tree t; |
fbbc17c7 MS |
2599 | DECL_RESULT (newdecl) = DECL_RESULT (olddecl); |
2600 | DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl); | |
2601 | DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl); | |
2602 | DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl); | |
dcb6e951 | 2603 | DECL_ARGUMENTS (newdecl) = copy_list (DECL_ARGUMENTS (olddecl)); |
910ad8de | 2604 | for (t = DECL_ARGUMENTS (newdecl); t ; t = DECL_CHAIN (t)) |
dcb6e951 | 2605 | DECL_CONTEXT (t) = newdecl; |
fbbc17c7 | 2606 | |
54dfd46b JH |
2607 | /* See if we've got a function to instantiate from. */ |
2608 | if (DECL_SAVED_TREE (olddecl)) | |
2609 | DECL_ABSTRACT_ORIGIN (newdecl) | |
2610 | = DECL_ABSTRACT_ORIGIN (olddecl); | |
fbbc17c7 MS |
2611 | } |
2612 | } | |
2613 | ||
a35120a3 L |
2614 | /* Merge the USED information. */ |
2615 | if (TREE_USED (olddecl)) | |
2616 | TREE_USED (newdecl) = 1; | |
2617 | else if (TREE_USED (newdecl)) | |
2618 | TREE_USED (olddecl) = 1; | |
0ae9bd27 | 2619 | if (VAR_P (olddecl) || TREE_CODE (olddecl) == PARM_DECL) |
ebfbbdc5 | 2620 | DECL_READ_P (newdecl) |= DECL_READ_P (olddecl); |
c387e067 MS |
2621 | if (DECL_PRESERVE_P (olddecl)) |
2622 | DECL_PRESERVE_P (newdecl) = 1; | |
2623 | else if (DECL_PRESERVE_P (newdecl)) | |
2624 | DECL_PRESERVE_P (olddecl) = 1; | |
e27fb29c | 2625 | |
c2d47482 PK |
2626 | /* Merge DECL_COMMON */ |
2627 | if (VAR_P (olddecl) && VAR_P (newdecl) | |
2628 | && !lookup_attribute ("common", DECL_ATTRIBUTES (newdecl)) | |
2629 | && !lookup_attribute ("nocommon", DECL_ATTRIBUTES (newdecl))) | |
2630 | DECL_COMMON (newdecl) = DECL_COMMON (newdecl) && DECL_COMMON (olddecl); | |
2631 | ||
fbbc17c7 | 2632 | /* Copy most of the decl-specific fields of NEWDECL into OLDDECL. |
f9417da1 RG |
2633 | But preserve OLDDECL's DECL_UID, DECL_CONTEXT and |
2634 | DECL_ARGUMENTS (if appropriate). */ | |
850cba29 | 2635 | { |
b3694847 | 2636 | unsigned olddecl_uid = DECL_UID (olddecl); |
9affb2c7 | 2637 | tree olddecl_context = DECL_CONTEXT (olddecl); |
dcb6e951 RAE |
2638 | tree olddecl_arguments = NULL; |
2639 | if (TREE_CODE (olddecl) == FUNCTION_DECL) | |
2640 | olddecl_arguments = DECL_ARGUMENTS (olddecl); | |
c22cacf3 | 2641 | |
da61dec9 JM |
2642 | memcpy ((char *) olddecl + sizeof (struct tree_common), |
2643 | (char *) newdecl + sizeof (struct tree_common), | |
820cc88f | 2644 | sizeof (struct tree_decl_common) - sizeof (struct tree_common)); |
45f41865 | 2645 | DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl); |
820cc88f DB |
2646 | switch (TREE_CODE (olddecl)) |
2647 | { | |
726a989a | 2648 | case FUNCTION_DECL: |
820cc88f | 2649 | case VAR_DECL: |
aede2c10 JH |
2650 | { |
2651 | struct symtab_node *snode = olddecl->decl_with_vis.symtab_node; | |
2652 | ||
2653 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), | |
2654 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2655 | tree_code_size (TREE_CODE (olddecl)) - sizeof (struct tree_decl_common)); | |
2656 | olddecl->decl_with_vis.symtab_node = snode; | |
5fcffe51 MT |
2657 | |
2658 | if ((DECL_EXTERNAL (olddecl) | |
2659 | || TREE_PUBLIC (olddecl) | |
2660 | || TREE_STATIC (olddecl)) | |
2661 | && DECL_SECTION_NAME (newdecl) != NULL) | |
2662 | set_decl_section_name (olddecl, DECL_SECTION_NAME (newdecl)); | |
2663 | ||
2664 | /* This isn't quite correct for something like | |
2665 | int __thread x attribute ((tls_model ("local-exec"))); | |
2666 | extern int __thread x; | |
2667 | as we'll lose the "local-exec" model. */ | |
0ae9bd27 | 2668 | if (VAR_P (olddecl) && DECL_THREAD_LOCAL_P (newdecl)) |
5fcffe51 | 2669 | set_decl_tls_model (olddecl, DECL_TLS_MODEL (newdecl)); |
aede2c10 JH |
2670 | break; |
2671 | } | |
2672 | ||
2673 | case FIELD_DECL: | |
820cc88f DB |
2674 | case PARM_DECL: |
2675 | case LABEL_DECL: | |
2676 | case RESULT_DECL: | |
2677 | case CONST_DECL: | |
2678 | case TYPE_DECL: | |
820cc88f DB |
2679 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), |
2680 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2681 | tree_code_size (TREE_CODE (olddecl)) - sizeof (struct tree_decl_common)); | |
2682 | break; | |
2683 | ||
2684 | default: | |
c22cacf3 | 2685 | |
820cc88f DB |
2686 | memcpy ((char *) olddecl + sizeof (struct tree_decl_common), |
2687 | (char *) newdecl + sizeof (struct tree_decl_common), | |
2688 | sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)); | |
2689 | } | |
850cba29 | 2690 | DECL_UID (olddecl) = olddecl_uid; |
9affb2c7 | 2691 | DECL_CONTEXT (olddecl) = olddecl_context; |
dcb6e951 RAE |
2692 | if (TREE_CODE (olddecl) == FUNCTION_DECL) |
2693 | DECL_ARGUMENTS (olddecl) = olddecl_arguments; | |
850cba29 | 2694 | } |
51e29401 | 2695 | |
2306d91c RH |
2696 | /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl |
2697 | so that encode_section_info has a chance to look at the new decl | |
2698 | flags and attributes. */ | |
2699 | if (DECL_RTL_SET_P (olddecl) | |
2700 | && (TREE_CODE (olddecl) == FUNCTION_DECL | |
0ae9bd27 | 2701 | || (VAR_P (olddecl) && TREE_STATIC (olddecl)))) |
0e6df31e | 2702 | make_decl_rtl (olddecl); |
51e29401 RS |
2703 | } |
2704 | ||
3c6e6fbf ZW |
2705 | /* Handle when a new declaration NEWDECL has the same name as an old |
2706 | one OLDDECL in the same binding contour. Prints an error message | |
2707 | if appropriate. | |
2708 | ||
2709 | If safely possible, alter OLDDECL to look like NEWDECL, and return | |
1ef82ef2 | 2710 | true. Otherwise, return false. */ |
3c6e6fbf ZW |
2711 | |
2712 | static bool | |
1ef82ef2 | 2713 | duplicate_decls (tree newdecl, tree olddecl) |
3c6e6fbf | 2714 | { |
6de9cd9a | 2715 | tree newtype = NULL, oldtype = NULL; |
3c6e6fbf ZW |
2716 | |
2717 | if (!diagnose_mismatched_decls (newdecl, olddecl, &newtype, &oldtype)) | |
f95f80d1 | 2718 | { |
f9837879 | 2719 | /* Avoid `unused variable' and other warnings for OLDDECL. */ |
f95f80d1 SB |
2720 | TREE_NO_WARNING (olddecl) = 1; |
2721 | return false; | |
2722 | } | |
3c6e6fbf | 2723 | |
1ef82ef2 | 2724 | merge_decls (newdecl, olddecl, newtype, oldtype); |
aede2c10 | 2725 | |
22e1cf1c JH |
2726 | /* The NEWDECL will no longer be needed. |
2727 | ||
2728 | Before releasing the node, be sure to remove function from symbol | |
2729 | table that might have been inserted there to record comdat group. | |
2730 | Be sure to however do not free DECL_STRUCT_FUNCTION because this | |
2731 | structure is shared in between NEWDECL and OLDECL. */ | |
2732 | if (TREE_CODE (newdecl) == FUNCTION_DECL) | |
2733 | DECL_STRUCT_FUNCTION (newdecl) = NULL; | |
21b634ae | 2734 | if (VAR_OR_FUNCTION_DECL_P (newdecl)) |
24d047a3 | 2735 | { |
d52f5295 | 2736 | struct symtab_node *snode = symtab_node::get (newdecl); |
24d047a3 | 2737 | if (snode) |
d52f5295 | 2738 | snode->remove (); |
24d047a3 | 2739 | } |
aede2c10 | 2740 | ggc_free (newdecl); |
1ef82ef2 | 2741 | return true; |
3c6e6fbf | 2742 | } |
118a3a8b | 2743 | |
3c6e6fbf | 2744 | \f |
1ad463f4 | 2745 | /* Check whether decl-node NEW_DECL shadows an existing declaration. */ |
339a28b9 | 2746 | static void |
1ad463f4 | 2747 | warn_if_shadowing (tree new_decl) |
339a28b9 | 2748 | { |
f75fbaf7 | 2749 | struct c_binding *b; |
339a28b9 | 2750 | |
f75fbaf7 | 2751 | /* Shadow warnings wanted? */ |
84ff4775 LCW |
2752 | if (!(warn_shadow |
2753 | || warn_shadow_local | |
2754 | || warn_shadow_compatible_local) | |
339a28b9 | 2755 | /* No shadow warnings for internally generated vars. */ |
1ad463f4 | 2756 | || DECL_IS_BUILTIN (new_decl) |
339a28b9 | 2757 | /* No shadow warnings for vars made for inlining. */ |
7c47d6e9 | 2758 | || DECL_FROM_INLINE (new_decl)) |
26f943fd NB |
2759 | return; |
2760 | ||
9aaabf8a | 2761 | /* Is anything being shadowed? Invisible decls do not count. */ |
1ad463f4 | 2762 | for (b = I_SYMBOL_BINDING (DECL_NAME (new_decl)); b; b = b->shadowed) |
1d551e4d AM |
2763 | if (b->decl && b->decl != new_decl && !b->invisible |
2764 | && (b->decl == error_mark_node | |
2765 | || diagnostic_report_warnings_p (global_dc, | |
2766 | DECL_SOURCE_LOCATION (b->decl)))) | |
f75fbaf7 | 2767 | { |
1ad463f4 | 2768 | tree old_decl = b->decl; |
6447c55d | 2769 | bool warned = false; |
f75fbaf7 | 2770 | |
d8dd2f3a JJ |
2771 | if (old_decl == error_mark_node) |
2772 | { | |
b9b8dde3 DD |
2773 | warning (OPT_Wshadow, "declaration of %q+D shadows previous " |
2774 | "non-variable", new_decl); | |
d8dd2f3a JJ |
2775 | break; |
2776 | } | |
2777 | else if (TREE_CODE (old_decl) == PARM_DECL) | |
84ff4775 LCW |
2778 | { |
2779 | enum opt_code warning_code; | |
2780 | ||
2781 | /* If '-Wshadow=compatible-local' is specified without other | |
2782 | -Wshadow= flags, we will warn only when the types of the | |
2783 | shadowing variable (i.e. new_decl) and the shadowed variable | |
2784 | (old_decl) are compatible. */ | |
2785 | if (warn_shadow) | |
2786 | warning_code = OPT_Wshadow; | |
2787 | else if (comptypes (TREE_TYPE (old_decl), TREE_TYPE (new_decl))) | |
2788 | warning_code = OPT_Wshadow_compatible_local; | |
2789 | else | |
2790 | warning_code = OPT_Wshadow_local; | |
2791 | warned = warning_at (DECL_SOURCE_LOCATION (new_decl), warning_code, | |
2792 | "declaration of %qD shadows a parameter", | |
2793 | new_decl); | |
2794 | } | |
b9b8dde3 | 2795 | else if (DECL_FILE_SCOPE_P (old_decl)) |
077d1abe MLI |
2796 | { |
2797 | /* Do not warn if a variable shadows a function, unless | |
2798 | the variable is a function or a pointer-to-function. */ | |
2799 | if (TREE_CODE (old_decl) == FUNCTION_DECL | |
2800 | && TREE_CODE (new_decl) != FUNCTION_DECL | |
2801 | && !FUNCTION_POINTER_TYPE_P (TREE_TYPE (new_decl))) | |
2802 | continue; | |
2803 | ||
6447c55d MP |
2804 | warned = warning_at (DECL_SOURCE_LOCATION (new_decl), OPT_Wshadow, |
2805 | "declaration of %qD shadows a global " | |
2806 | "declaration", | |
2807 | new_decl); | |
077d1abe | 2808 | } |
1ad463f4 BI |
2809 | else if (TREE_CODE (old_decl) == FUNCTION_DECL |
2810 | && DECL_BUILT_IN (old_decl)) | |
d8dd2f3a | 2811 | { |
b9b8dde3 DD |
2812 | warning (OPT_Wshadow, "declaration of %q+D shadows " |
2813 | "a built-in function", new_decl); | |
d8dd2f3a JJ |
2814 | break; |
2815 | } | |
f75fbaf7 | 2816 | else |
84ff4775 LCW |
2817 | { |
2818 | enum opt_code warning_code; | |
2819 | ||
2820 | /* If '-Wshadow=compatible-local' is specified without other | |
2821 | -Wshadow= flags, we will warn only when the types of the | |
2822 | shadowing variable (i.e. new_decl) and the shadowed variable | |
2823 | (old_decl) are compatible. */ | |
2824 | if (warn_shadow) | |
2825 | warning_code = OPT_Wshadow; | |
2826 | else if (comptypes (TREE_TYPE (old_decl), TREE_TYPE (new_decl))) | |
2827 | warning_code = OPT_Wshadow_compatible_local; | |
2828 | else | |
2829 | warning_code = OPT_Wshadow_local; | |
2830 | warned = warning_at (DECL_SOURCE_LOCATION (new_decl), warning_code, | |
2831 | "declaration of %qD shadows a previous local", | |
2832 | new_decl); | |
2833 | } | |
f75fbaf7 | 2834 | |
6447c55d MP |
2835 | if (warned) |
2836 | inform (DECL_SOURCE_LOCATION (old_decl), | |
2837 | "shadowed declaration is here"); | |
a6f78652 | 2838 | |
f75fbaf7 ZW |
2839 | break; |
2840 | } | |
339a28b9 ZW |
2841 | } |
2842 | ||
51e29401 RS |
2843 | /* Record a decl-node X as belonging to the current lexical scope. |
2844 | Check for errors (such as an incompatible declaration for the same | |
2845 | name already seen in the same scope). | |
2846 | ||
2847 | Returns either X or an old decl for the same name. | |
2848 | If an old decl is returned, it may have been smashed | |
2849 | to agree with what X says. */ | |
2850 | ||
2851 | tree | |
35b1a6fa | 2852 | pushdecl (tree x) |
51e29401 | 2853 | { |
b3694847 | 2854 | tree name = DECL_NAME (x); |
f8521984 | 2855 | struct c_scope *scope = current_scope; |
f75fbaf7 | 2856 | struct c_binding *b; |
9aaabf8a | 2857 | bool nested = false; |
b3f27c15 | 2858 | location_t locus = DECL_SOURCE_LOCATION (x); |
51e29401 | 2859 | |
eecec698 ZW |
2860 | /* Must set DECL_CONTEXT for everything not at file scope or |
2861 | DECL_FILE_SCOPE_P won't work. Local externs don't count | |
2862 | unless they have initializers (which generate code). */ | |
2863 | if (current_function_decl | |
21b634ae | 2864 | && (!VAR_OR_FUNCTION_DECL_P (x) |
eecec698 | 2865 | || DECL_INITIAL (x) || !DECL_EXTERNAL (x))) |
339a28b9 | 2866 | DECL_CONTEXT (x) = current_function_decl; |
e13e48e7 | 2867 | |
f75fbaf7 ZW |
2868 | /* Anonymous decls are just inserted in the scope. */ |
2869 | if (!name) | |
51e29401 | 2870 | { |
b3f27c15 JJ |
2871 | bind (name, x, scope, /*invisible=*/false, /*nested=*/false, |
2872 | locus); | |
f75fbaf7 ZW |
2873 | return x; |
2874 | } | |
2875 | ||
2876 | /* First, see if there is another declaration with the same name in | |
2877 | the current scope. If there is, duplicate_decls may do all the | |
2878 | work for us. If duplicate_decls returns false, that indicates | |
2879 | two incompatible decls in the same scope; we are to silently | |
2880 | replace the old one (duplicate_decls has issued all appropriate | |
2881 | diagnostics). In particular, we should not consider possible | |
2882 | duplicates in the external scope, or shadowing. */ | |
2883 | b = I_SYMBOL_BINDING (name); | |
9aaabf8a | 2884 | if (b && B_IN_SCOPE (b, scope)) |
f75fbaf7 | 2885 | { |
2798c11f JM |
2886 | struct c_binding *b_ext, *b_use; |
2887 | tree type = TREE_TYPE (x); | |
2888 | tree visdecl = b->decl; | |
2889 | tree vistype = TREE_TYPE (visdecl); | |
0b410f0b JM |
2890 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE |
2891 | && COMPLETE_TYPE_P (TREE_TYPE (x))) | |
2892 | b->inner_comp = false; | |
2798c11f JM |
2893 | b_use = b; |
2894 | b_ext = b; | |
2895 | /* If this is an external linkage declaration, we should check | |
2896 | for compatibility with the type in the external scope before | |
2897 | setting the type at this scope based on the visible | |
2898 | information only. */ | |
2899 | if (TREE_PUBLIC (x) && TREE_PUBLIC (visdecl)) | |
2900 | { | |
2901 | while (b_ext && !B_IN_EXTERNAL_SCOPE (b_ext)) | |
2902 | b_ext = b_ext->shadowed; | |
2903 | if (b_ext) | |
2904 | { | |
2905 | b_use = b_ext; | |
e1b7793c ILT |
2906 | if (b_use->u.type) |
2907 | TREE_TYPE (b_use->decl) = b_use->u.type; | |
2798c11f JM |
2908 | } |
2909 | } | |
2910 | if (duplicate_decls (x, b_use->decl)) | |
2911 | { | |
2912 | if (b_use != b) | |
2913 | { | |
2914 | /* Save the updated type in the external scope and | |
2915 | restore the proper type for this scope. */ | |
2916 | tree thistype; | |
2917 | if (comptypes (vistype, type)) | |
2918 | thistype = composite_type (vistype, type); | |
2919 | else | |
2920 | thistype = TREE_TYPE (b_use->decl); | |
e1b7793c | 2921 | b_use->u.type = TREE_TYPE (b_use->decl); |
2798c11f JM |
2922 | if (TREE_CODE (b_use->decl) == FUNCTION_DECL |
2923 | && DECL_BUILT_IN (b_use->decl)) | |
2924 | thistype | |
2925 | = build_type_attribute_variant (thistype, | |
2926 | TYPE_ATTRIBUTES | |
e1b7793c | 2927 | (b_use->u.type)); |
2798c11f JM |
2928 | TREE_TYPE (b_use->decl) = thistype; |
2929 | } | |
2930 | return b_use->decl; | |
2931 | } | |
f75fbaf7 ZW |
2932 | else |
2933 | goto skip_external_and_shadow_checks; | |
2934 | } | |
2935 | ||
2936 | /* All declarations with external linkage, and all external | |
2937 | references, go in the external scope, no matter what scope is | |
2938 | current. However, the binding in that scope is ignored for | |
2939 | purposes of normal name lookup. A separate binding structure is | |
2940 | created in the requested scope; this governs the normal | |
2941 | visibility of the symbol. | |
51e29401 | 2942 | |
f75fbaf7 ZW |
2943 | The binding in the externals scope is used exclusively for |
2944 | detecting duplicate declarations of the same object, no matter | |
2945 | what scope they are in; this is what we do here. (C99 6.2.7p2: | |
2946 | All declarations that refer to the same object or function shall | |
2947 | have compatible type; otherwise, the behavior is undefined.) */ | |
2948 | if (DECL_EXTERNAL (x) || scope == file_scope) | |
2949 | { | |
0b410f0b | 2950 | tree type = TREE_TYPE (x); |
3fa8871b MP |
2951 | tree vistype = NULL_TREE; |
2952 | tree visdecl = NULL_TREE; | |
0b410f0b JM |
2953 | bool type_saved = false; |
2954 | if (b && !B_IN_EXTERNAL_SCOPE (b) | |
21b634ae | 2955 | && VAR_OR_FUNCTION_DECL_P (b->decl) |
0b410f0b JM |
2956 | && DECL_FILE_SCOPE_P (b->decl)) |
2957 | { | |
2958 | visdecl = b->decl; | |
2959 | vistype = TREE_TYPE (visdecl); | |
2960 | } | |
3176a0c2 | 2961 | if (scope != file_scope |
234f46ae | 2962 | && !DECL_IN_SYSTEM_HEADER (x)) |
b02a5e26 MP |
2963 | warning_at (locus, OPT_Wnested_externs, |
2964 | "nested extern declaration of %qD", x); | |
234f46ae | 2965 | |
9aaabf8a | 2966 | while (b && !B_IN_EXTERNAL_SCOPE (b)) |
0b410f0b JM |
2967 | { |
2968 | /* If this decl might be modified, save its type. This is | |
2969 | done here rather than when the decl is first bound | |
2970 | because the type may change after first binding, through | |
2971 | being completed or through attributes being added. If we | |
2972 | encounter multiple such decls, only the first should have | |
2973 | its type saved; the others will already have had their | |
2974 | proper types saved and the types will not have changed as | |
2975 | their scopes will not have been re-entered. */ | |
d8dd2f3a | 2976 | if (DECL_P (b->decl) && DECL_FILE_SCOPE_P (b->decl) && !type_saved) |
0b410f0b | 2977 | { |
e1b7793c | 2978 | b->u.type = TREE_TYPE (b->decl); |
0b410f0b JM |
2979 | type_saved = true; |
2980 | } | |
2981 | if (B_IN_FILE_SCOPE (b) | |
0ae9bd27 | 2982 | && VAR_P (b->decl) |
0b410f0b JM |
2983 | && TREE_STATIC (b->decl) |
2984 | && TREE_CODE (TREE_TYPE (b->decl)) == ARRAY_TYPE | |
2985 | && !TYPE_DOMAIN (TREE_TYPE (b->decl)) | |
2986 | && TREE_CODE (type) == ARRAY_TYPE | |
2987 | && TYPE_DOMAIN (type) | |
2988 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) | |
2989 | && !integer_zerop (TYPE_MAX_VALUE (TYPE_DOMAIN (type)))) | |
2990 | { | |
2991 | /* Array type completed in inner scope, which should be | |
2992 | diagnosed if the completion does not have size 1 and | |
2993 | it does not get completed in the file scope. */ | |
2994 | b->inner_comp = true; | |
2995 | } | |
2996 | b = b->shadowed; | |
2997 | } | |
2998 | ||
2999 | /* If a matching external declaration has been found, set its | |
3000 | type to the composite of all the types of that declaration. | |
3001 | After the consistency checks, it will be reset to the | |
3002 | composite of the visible types only. */ | |
3003 | if (b && (TREE_PUBLIC (x) || same_translation_unit_p (x, b->decl)) | |
e1b7793c ILT |
3004 | && b->u.type) |
3005 | TREE_TYPE (b->decl) = b->u.type; | |
f75fbaf7 ZW |
3006 | |
3007 | /* The point of the same_translation_unit_p check here is, | |
3008 | we want to detect a duplicate decl for a construct like | |
3009 | foo() { extern bar(); } ... static bar(); but not if | |
3010 | they are in different translation units. In any case, | |
3011 | the static does not go in the externals scope. */ | |
3012 | if (b | |
9affb2c7 | 3013 | && (TREE_PUBLIC (x) || same_translation_unit_p (x, b->decl)) |
f75fbaf7 | 3014 | && duplicate_decls (x, b->decl)) |
55d54003 | 3015 | { |
0b410f0b | 3016 | tree thistype; |
2798c11f JM |
3017 | if (vistype) |
3018 | { | |
3019 | if (comptypes (vistype, type)) | |
3020 | thistype = composite_type (vistype, type); | |
3021 | else | |
3022 | thistype = TREE_TYPE (b->decl); | |
3023 | } | |
3024 | else | |
3025 | thistype = type; | |
e1b7793c | 3026 | b->u.type = TREE_TYPE (b->decl); |
0b410f0b JM |
3027 | if (TREE_CODE (b->decl) == FUNCTION_DECL && DECL_BUILT_IN (b->decl)) |
3028 | thistype | |
3029 | = build_type_attribute_variant (thistype, | |
e1b7793c | 3030 | TYPE_ATTRIBUTES (b->u.type)); |
0b410f0b | 3031 | TREE_TYPE (b->decl) = thistype; |
b3f27c15 JJ |
3032 | bind (name, b->decl, scope, /*invisible=*/false, /*nested=*/true, |
3033 | locus); | |
f75fbaf7 | 3034 | return b->decl; |
55d54003 | 3035 | } |
9affb2c7 | 3036 | else if (TREE_PUBLIC (x)) |
6645c3fa | 3037 | { |
0b410f0b JM |
3038 | if (visdecl && !b && duplicate_decls (x, visdecl)) |
3039 | { | |
3040 | /* An external declaration at block scope referring to a | |
3041 | visible entity with internal linkage. The composite | |
3042 | type will already be correct for this scope, so we | |
3043 | just need to fall through to make the declaration in | |
3044 | this scope. */ | |
3045 | nested = true; | |
1b36c818 | 3046 | x = visdecl; |
0b410f0b JM |
3047 | } |
3048 | else | |
3049 | { | |
3050 | bind (name, x, external_scope, /*invisible=*/true, | |
b3f27c15 | 3051 | /*nested=*/false, locus); |
0b410f0b JM |
3052 | nested = true; |
3053 | } | |
51e29401 | 3054 | } |
f75fbaf7 | 3055 | } |
35b1a6fa | 3056 | |
7c47d6e9 JM |
3057 | if (TREE_CODE (x) != PARM_DECL) |
3058 | warn_if_shadowing (x); | |
51e29401 | 3059 | |
f75fbaf7 ZW |
3060 | skip_external_and_shadow_checks: |
3061 | if (TREE_CODE (x) == TYPE_DECL) | |
3797cb21 DS |
3062 | { |
3063 | /* So this is a typedef, set its underlying type. */ | |
3064 | set_underlying_type (x); | |
3065 | ||
3066 | /* If X is a typedef defined in the current function, record it | |
3067 | for the purpose of implementing the -Wunused-local-typedefs | |
3068 | warning. */ | |
3069 | record_locally_defined_typedef (x); | |
3070 | } | |
51e29401 | 3071 | |
b3f27c15 | 3072 | bind (name, x, scope, /*invisible=*/false, nested, locus); |
f75fbaf7 ZW |
3073 | |
3074 | /* If x's type is incomplete because it's based on a | |
3075 | structure or union which has not yet been fully declared, | |
3076 | attach it to that structure or union type, so we can go | |
3077 | back and complete the variable declaration later, if the | |
3078 | structure or union gets fully declared. | |
51e29401 | 3079 | |
f75fbaf7 ZW |
3080 | If the input is erroneous, we can have error_mark in the type |
3081 | slot (e.g. "f(void a, ...)") - that doesn't count as an | |
3082 | incomplete type. */ | |
3083 | if (TREE_TYPE (x) != error_mark_node | |
3084 | && !COMPLETE_TYPE_P (TREE_TYPE (x))) | |
3085 | { | |
3086 | tree element = TREE_TYPE (x); | |
3087 | ||
3088 | while (TREE_CODE (element) == ARRAY_TYPE) | |
3089 | element = TREE_TYPE (element); | |
3090 | element = TYPE_MAIN_VARIANT (element); | |
3091 | ||
3e636daf | 3092 | if (RECORD_OR_UNION_TYPE_P (element) |
f75fbaf7 ZW |
3093 | && (TREE_CODE (x) != TYPE_DECL |
3094 | || TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE) | |
3095 | && !COMPLETE_TYPE_P (element)) | |
3096 | C_TYPE_INCOMPLETE_VARS (element) | |
3097 | = tree_cons (NULL_TREE, x, C_TYPE_INCOMPLETE_VARS (element)); | |
3098 | } | |
51e29401 RS |
3099 | return x; |
3100 | } | |
51e29401 | 3101 | \f |
85059a38 MP |
3102 | |
3103 | /* Issue a warning about implicit function declaration. ID is the function | |
3104 | identifier, OLDDECL is a declaration of the function in a different scope, | |
3105 | or NULL_TREE. */ | |
3106 | ||
f75fbaf7 | 3107 | static void |
30281de2 | 3108 | implicit_decl_warning (location_t loc, tree id, tree olddecl) |
f75fbaf7 | 3109 | { |
85059a38 MP |
3110 | if (!warn_implicit_function_declaration) |
3111 | return; | |
71205d17 | 3112 | |
85059a38 | 3113 | bool warned; |
6c7a259b | 3114 | name_hint hint; |
85059a38 | 3115 | if (!olddecl) |
6c7a259b | 3116 | hint = lookup_name_fuzzy (id, FUZZY_LOOKUP_FUNCTION_NAME, loc); |
85059a38 MP |
3117 | |
3118 | if (flag_isoc99) | |
3119 | { | |
3120 | if (hint) | |
3121 | { | |
3122 | gcc_rich_location richloc (loc); | |
6c7a259b | 3123 | richloc.add_fixit_replace (hint.suggestion ()); |
64a5912c DM |
3124 | warned = pedwarn (&richloc, OPT_Wimplicit_function_declaration, |
3125 | "implicit declaration of function %qE;" | |
3126 | " did you mean %qs?", | |
6c7a259b | 3127 | id, hint.suggestion ()); |
85059a38 | 3128 | } |
b8698a0f | 3129 | else |
85059a38 MP |
3130 | warned = pedwarn (loc, OPT_Wimplicit_function_declaration, |
3131 | "implicit declaration of function %qE", id); | |
f75fbaf7 | 3132 | } |
85059a38 MP |
3133 | else if (hint) |
3134 | { | |
3135 | gcc_rich_location richloc (loc); | |
6c7a259b | 3136 | richloc.add_fixit_replace (hint.suggestion ()); |
64a5912c | 3137 | warned = warning_at |
85059a38 MP |
3138 | (&richloc, OPT_Wimplicit_function_declaration, |
3139 | G_("implicit declaration of function %qE; did you mean %qs?"), | |
6c7a259b | 3140 | id, hint.suggestion ()); |
85059a38 MP |
3141 | } |
3142 | else | |
3143 | warned = warning_at (loc, OPT_Wimplicit_function_declaration, | |
3144 | G_("implicit declaration of function %qE"), id); | |
3145 | ||
3146 | if (olddecl && warned) | |
3147 | locate_old_decl (olddecl); | |
6c7a259b DM |
3148 | |
3149 | if (!warned) | |
3150 | hint.suppress (); | |
f75fbaf7 ZW |
3151 | } |
3152 | ||
0382aaa0 MP |
3153 | /* This function represents mapping of a function code FCODE |
3154 | to its respective header. */ | |
3155 | ||
3156 | static const char * | |
3157 | header_for_builtin_fn (enum built_in_function fcode) | |
3158 | { | |
3159 | switch (fcode) | |
3160 | { | |
3161 | CASE_FLT_FN (BUILT_IN_ACOS): | |
3162 | CASE_FLT_FN (BUILT_IN_ACOSH): | |
3163 | CASE_FLT_FN (BUILT_IN_ASIN): | |
3164 | CASE_FLT_FN (BUILT_IN_ASINH): | |
3165 | CASE_FLT_FN (BUILT_IN_ATAN): | |
3166 | CASE_FLT_FN (BUILT_IN_ATANH): | |
3167 | CASE_FLT_FN (BUILT_IN_ATAN2): | |
3168 | CASE_FLT_FN (BUILT_IN_CBRT): | |
3169 | CASE_FLT_FN (BUILT_IN_CEIL): | |
3170 | CASE_FLT_FN (BUILT_IN_COPYSIGN): | |
ee5fd23a | 3171 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_COPYSIGN): |
0382aaa0 MP |
3172 | CASE_FLT_FN (BUILT_IN_COS): |
3173 | CASE_FLT_FN (BUILT_IN_COSH): | |
3174 | CASE_FLT_FN (BUILT_IN_ERF): | |
3175 | CASE_FLT_FN (BUILT_IN_ERFC): | |
3176 | CASE_FLT_FN (BUILT_IN_EXP): | |
3177 | CASE_FLT_FN (BUILT_IN_EXP2): | |
3178 | CASE_FLT_FN (BUILT_IN_EXPM1): | |
3179 | CASE_FLT_FN (BUILT_IN_FABS): | |
ee5fd23a | 3180 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FABS): |
0382aaa0 MP |
3181 | CASE_FLT_FN (BUILT_IN_FDIM): |
3182 | CASE_FLT_FN (BUILT_IN_FLOOR): | |
3183 | CASE_FLT_FN (BUILT_IN_FMA): | |
ee5fd23a | 3184 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMA): |
0382aaa0 | 3185 | CASE_FLT_FN (BUILT_IN_FMAX): |
ee5fd23a | 3186 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMAX): |
0382aaa0 | 3187 | CASE_FLT_FN (BUILT_IN_FMIN): |
ee5fd23a | 3188 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_FMIN): |
0382aaa0 MP |
3189 | CASE_FLT_FN (BUILT_IN_FMOD): |
3190 | CASE_FLT_FN (BUILT_IN_FREXP): | |
3191 | CASE_FLT_FN (BUILT_IN_HYPOT): | |
3192 | CASE_FLT_FN (BUILT_IN_ILOGB): | |
3193 | CASE_FLT_FN (BUILT_IN_LDEXP): | |
3194 | CASE_FLT_FN (BUILT_IN_LGAMMA): | |
3195 | CASE_FLT_FN (BUILT_IN_LLRINT): | |
3196 | CASE_FLT_FN (BUILT_IN_LLROUND): | |
3197 | CASE_FLT_FN (BUILT_IN_LOG): | |
3198 | CASE_FLT_FN (BUILT_IN_LOG10): | |
3199 | CASE_FLT_FN (BUILT_IN_LOG1P): | |
3200 | CASE_FLT_FN (BUILT_IN_LOG2): | |
3201 | CASE_FLT_FN (BUILT_IN_LOGB): | |
3202 | CASE_FLT_FN (BUILT_IN_LRINT): | |
3203 | CASE_FLT_FN (BUILT_IN_LROUND): | |
3204 | CASE_FLT_FN (BUILT_IN_MODF): | |
3205 | CASE_FLT_FN (BUILT_IN_NAN): | |
3206 | CASE_FLT_FN (BUILT_IN_NEARBYINT): | |
3207 | CASE_FLT_FN (BUILT_IN_NEXTAFTER): | |
3208 | CASE_FLT_FN (BUILT_IN_NEXTTOWARD): | |
3209 | CASE_FLT_FN (BUILT_IN_POW): | |
3210 | CASE_FLT_FN (BUILT_IN_REMAINDER): | |
3211 | CASE_FLT_FN (BUILT_IN_REMQUO): | |
3212 | CASE_FLT_FN (BUILT_IN_RINT): | |
3213 | CASE_FLT_FN (BUILT_IN_ROUND): | |
3214 | CASE_FLT_FN (BUILT_IN_SCALBLN): | |
3215 | CASE_FLT_FN (BUILT_IN_SCALBN): | |
3216 | CASE_FLT_FN (BUILT_IN_SIN): | |
3217 | CASE_FLT_FN (BUILT_IN_SINH): | |
3218 | CASE_FLT_FN (BUILT_IN_SINCOS): | |
3219 | CASE_FLT_FN (BUILT_IN_SQRT): | |
ee5fd23a | 3220 | CASE_FLT_FN_FLOATN_NX (BUILT_IN_SQRT): |
0382aaa0 MP |
3221 | CASE_FLT_FN (BUILT_IN_TAN): |
3222 | CASE_FLT_FN (BUILT_IN_TANH): | |
3223 | CASE_FLT_FN (BUILT_IN_TGAMMA): | |
3224 | CASE_FLT_FN (BUILT_IN_TRUNC): | |
3225 | case BUILT_IN_ISINF: | |
3226 | case BUILT_IN_ISNAN: | |
3227 | return "<math.h>"; | |
3228 | CASE_FLT_FN (BUILT_IN_CABS): | |
3229 | CASE_FLT_FN (BUILT_IN_CACOS): | |
3230 | CASE_FLT_FN (BUILT_IN_CACOSH): | |
3231 | CASE_FLT_FN (BUILT_IN_CARG): | |
3232 | CASE_FLT_FN (BUILT_IN_CASIN): | |
3233 | CASE_FLT_FN (BUILT_IN_CASINH): | |
3234 | CASE_FLT_FN (BUILT_IN_CATAN): | |
3235 | CASE_FLT_FN (BUILT_IN_CATANH): | |
3236 | CASE_FLT_FN (BUILT_IN_CCOS): | |
3237 | CASE_FLT_FN (BUILT_IN_CCOSH): | |
3238 | CASE_FLT_FN (BUILT_IN_CEXP): | |
3239 | CASE_FLT_FN (BUILT_IN_CIMAG): | |
3240 | CASE_FLT_FN (BUILT_IN_CLOG): | |
3241 | CASE_FLT_FN (BUILT_IN_CONJ): | |
3242 | CASE_FLT_FN (BUILT_IN_CPOW): | |
3243 | CASE_FLT_FN (BUILT_IN_CPROJ): | |
3244 | CASE_FLT_FN (BUILT_IN_CREAL): | |
3245 | CASE_FLT_FN (BUILT_IN_CSIN): | |
3246 | CASE_FLT_FN (BUILT_IN_CSINH): | |
3247 | CASE_FLT_FN (BUILT_IN_CSQRT): | |
3248 | CASE_FLT_FN (BUILT_IN_CTAN): | |
3249 | CASE_FLT_FN (BUILT_IN_CTANH): | |
3250 | return "<complex.h>"; | |
3251 | case BUILT_IN_MEMCHR: | |
3252 | case BUILT_IN_MEMCMP: | |
3253 | case BUILT_IN_MEMCPY: | |
3254 | case BUILT_IN_MEMMOVE: | |
3255 | case BUILT_IN_MEMSET: | |
3256 | case BUILT_IN_STRCAT: | |
3257 | case BUILT_IN_STRCHR: | |
3258 | case BUILT_IN_STRCMP: | |
3259 | case BUILT_IN_STRCPY: | |
3260 | case BUILT_IN_STRCSPN: | |
3261 | case BUILT_IN_STRLEN: | |
3262 | case BUILT_IN_STRNCAT: | |
3263 | case BUILT_IN_STRNCMP: | |
3264 | case BUILT_IN_STRNCPY: | |
3265 | case BUILT_IN_STRPBRK: | |
3266 | case BUILT_IN_STRRCHR: | |
3267 | case BUILT_IN_STRSPN: | |
3268 | case BUILT_IN_STRSTR: | |
3269 | return "<string.h>"; | |
3270 | case BUILT_IN_FPRINTF: | |
3271 | case BUILT_IN_PUTC: | |
3272 | case BUILT_IN_FPUTC: | |
3273 | case BUILT_IN_FPUTS: | |
3274 | case BUILT_IN_FSCANF: | |
3275 | case BUILT_IN_FWRITE: | |
3276 | case BUILT_IN_PRINTF: | |
3277 | case BUILT_IN_PUTCHAR: | |
3278 | case BUILT_IN_PUTS: | |
3279 | case BUILT_IN_SCANF: | |
3280 | case BUILT_IN_SNPRINTF: | |
3281 | case BUILT_IN_SPRINTF: | |
3282 | case BUILT_IN_SSCANF: | |
3283 | case BUILT_IN_VFPRINTF: | |
3284 | case BUILT_IN_VFSCANF: | |
3285 | case BUILT_IN_VPRINTF: | |
3286 | case BUILT_IN_VSCANF: | |
3287 | case BUILT_IN_VSNPRINTF: | |
3288 | case BUILT_IN_VSPRINTF: | |
3289 | case BUILT_IN_VSSCANF: | |
3290 | return "<stdio.h>"; | |
3291 | case BUILT_IN_ISALNUM: | |
3292 | case BUILT_IN_ISALPHA: | |
3293 | case BUILT_IN_ISBLANK: | |
3294 | case BUILT_IN_ISCNTRL: | |
3295 | case BUILT_IN_ISDIGIT: | |
3296 | case BUILT_IN_ISGRAPH: | |
3297 | case BUILT_IN_ISLOWER: | |
3298 | case BUILT_IN_ISPRINT: | |
3299 | case BUILT_IN_ISPUNCT: | |
3300 | case BUILT_IN_ISSPACE: | |
3301 | case BUILT_IN_ISUPPER: | |
3302 | case BUILT_IN_ISXDIGIT: | |
3303 | case BUILT_IN_TOLOWER: | |
3304 | case BUILT_IN_TOUPPER: | |
3305 | return "<ctype.h>"; | |
3306 | case BUILT_IN_ISWALNUM: | |
3307 | case BUILT_IN_ISWALPHA: | |
3308 | case BUILT_IN_ISWBLANK: | |
3309 | case BUILT_IN_ISWCNTRL: | |
3310 | case BUILT_IN_ISWDIGIT: | |
3311 | case BUILT_IN_ISWGRAPH: | |
3312 | case BUILT_IN_ISWLOWER: | |
3313 | case BUILT_IN_ISWPRINT: | |
3314 | case BUILT_IN_ISWPUNCT: | |
3315 | case BUILT_IN_ISWSPACE: | |
3316 | case BUILT_IN_ISWUPPER: | |
3317 | case BUILT_IN_ISWXDIGIT: | |
3318 | case BUILT_IN_TOWLOWER: | |
3319 | case BUILT_IN_TOWUPPER: | |
3320 | return "<wctype.h>"; | |
3321 | case BUILT_IN_ABORT: | |
3322 | case BUILT_IN_ABS: | |
3323 | case BUILT_IN_CALLOC: | |
3324 | case BUILT_IN_EXIT: | |
3325 | case BUILT_IN_FREE: | |
3326 | case BUILT_IN_LABS: | |
3327 | case BUILT_IN_LLABS: | |
3328 | case BUILT_IN_MALLOC: | |
3329 | case BUILT_IN_REALLOC: | |
3330 | case BUILT_IN__EXIT2: | |
3331 | case BUILT_IN_ALIGNED_ALLOC: | |
3332 | return "<stdlib.h>"; | |
3333 | case BUILT_IN_IMAXABS: | |
3334 | return "<inttypes.h>"; | |
3335 | case BUILT_IN_STRFTIME: | |
3336 | return "<time.h>"; | |
3337 | default: | |
3338 | return NULL; | |
3339 | } | |
3340 | } | |
3341 | ||
c2255bc4 | 3342 | /* Generate an implicit declaration for identifier FUNCTIONID at LOC as a |
339a28b9 | 3343 | function of type int (). */ |
51e29401 RS |
3344 | |
3345 | tree | |
c2255bc4 | 3346 | implicitly_declare (location_t loc, tree functionid) |
51e29401 | 3347 | { |
0b410f0b | 3348 | struct c_binding *b; |
3fa8871b | 3349 | tree decl = NULL_TREE; |
1ae57298 MM |
3350 | tree asmspec_tree; |
3351 | ||
0b410f0b JM |
3352 | for (b = I_SYMBOL_BINDING (functionid); b; b = b->shadowed) |
3353 | { | |
3354 | if (B_IN_SCOPE (b, external_scope)) | |
3355 | { | |
3356 | decl = b->decl; | |
3357 | break; | |
3358 | } | |
3359 | } | |
51e29401 | 3360 | |
f91f41b2 | 3361 | if (decl) |
339a28b9 | 3362 | { |
e00dceaf | 3363 | if (TREE_CODE (decl) != FUNCTION_DECL) |
d8dd2f3a JJ |
3364 | return decl; |
3365 | ||
f75fbaf7 ZW |
3366 | /* FIXME: Objective-C has weird not-really-builtin functions |
3367 | which are supposed to be visible automatically. They wind up | |
3368 | in the external scope because they're pushed before the file | |
3369 | scope gets created. Catch this here and rebind them into the | |
3370 | file scope. */ | |
3c20847b | 3371 | if (!DECL_BUILT_IN (decl) && DECL_IS_BUILTIN (decl)) |
f75fbaf7 | 3372 | { |
9aaabf8a | 3373 | bind (functionid, decl, file_scope, |
b3f27c15 JJ |
3374 | /*invisible=*/false, /*nested=*/true, |
3375 | DECL_SOURCE_LOCATION (decl)); | |
f75fbaf7 ZW |
3376 | return decl; |
3377 | } | |
3378 | else | |
339a28b9 | 3379 | { |
0b410f0b | 3380 | tree newtype = default_function_type; |
e1b7793c ILT |
3381 | if (b->u.type) |
3382 | TREE_TYPE (decl) = b->u.type; | |
f75fbaf7 ZW |
3383 | /* Implicit declaration of a function already declared |
3384 | (somehow) in a different scope, or as a built-in. | |
3385 | If this is the first time this has happened, warn; | |
0b410f0b | 3386 | then recycle the old declaration but with the new type. */ |
f75fbaf7 ZW |
3387 | if (!C_DECL_IMPLICIT (decl)) |
3388 | { | |
30281de2 | 3389 | implicit_decl_warning (loc, functionid, decl); |
f75fbaf7 ZW |
3390 | C_DECL_IMPLICIT (decl) = 1; |
3391 | } | |
9cbe78fb JM |
3392 | if (DECL_BUILT_IN (decl)) |
3393 | { | |
0b410f0b JM |
3394 | newtype = build_type_attribute_variant (newtype, |
3395 | TYPE_ATTRIBUTES | |
3396 | (TREE_TYPE (decl))); | |
3397 | if (!comptypes (newtype, TREE_TYPE (decl))) | |
9cbe78fb | 3398 | { |
0382aaa0 MP |
3399 | bool warned = warning_at (loc, 0, "incompatible implicit " |
3400 | "declaration of built-in " | |
3401 | "function %qD", decl); | |
3402 | /* See if we can hint which header to include. */ | |
3403 | const char *header | |
3404 | = header_for_builtin_fn (DECL_FUNCTION_CODE (decl)); | |
3405 | if (header != NULL && warned) | |
eea77d1f DM |
3406 | { |
3407 | rich_location richloc (line_table, loc); | |
3408 | maybe_add_include_fixit (&richloc, header); | |
64a5912c DM |
3409 | inform (&richloc, |
3410 | "include %qs or provide a declaration of %qD", | |
3411 | header, decl); | |
eea77d1f | 3412 | } |
0b410f0b | 3413 | newtype = TREE_TYPE (decl); |
9cbe78fb JM |
3414 | } |
3415 | } | |
3416 | else | |
3417 | { | |
0b410f0b | 3418 | if (!comptypes (newtype, TREE_TYPE (decl))) |
9cbe78fb | 3419 | { |
0382aaa0 MP |
3420 | error_at (loc, "incompatible implicit declaration of " |
3421 | "function %qD", decl); | |
71205d17 | 3422 | locate_old_decl (decl); |
9cbe78fb JM |
3423 | } |
3424 | } | |
e1b7793c | 3425 | b->u.type = TREE_TYPE (decl); |
0b410f0b | 3426 | TREE_TYPE (decl) = newtype; |
9aaabf8a | 3427 | bind (functionid, decl, current_scope, |
b3f27c15 JJ |
3428 | /*invisible=*/false, /*nested=*/true, |
3429 | DECL_SOURCE_LOCATION (decl)); | |
f75fbaf7 | 3430 | return decl; |
339a28b9 | 3431 | } |
339a28b9 | 3432 | } |
51e29401 | 3433 | |
339a28b9 | 3434 | /* Not seen before. */ |
c2255bc4 | 3435 | decl = build_decl (loc, FUNCTION_DECL, functionid, default_function_type); |
1394aabd | 3436 | DECL_EXTERNAL (decl) = 1; |
51e29401 | 3437 | TREE_PUBLIC (decl) = 1; |
339a28b9 | 3438 | C_DECL_IMPLICIT (decl) = 1; |
30281de2 | 3439 | implicit_decl_warning (loc, functionid, 0); |
1ae57298 MM |
3440 | asmspec_tree = maybe_apply_renaming_pragma (decl, /*asmname=*/NULL); |
3441 | if (asmspec_tree) | |
3442 | set_user_assembler_name (decl, TREE_STRING_POINTER (asmspec_tree)); | |
51e29401 | 3443 | |
14077d68 | 3444 | /* C89 says implicit declarations are in the innermost block. |
f458d1d5 | 3445 | So we record the decl in the standard fashion. */ |
339a28b9 | 3446 | decl = pushdecl (decl); |
51e29401 | 3447 | |
339a28b9 | 3448 | /* No need to call objc_check_decl here - it's a function type. */ |
0e6df31e | 3449 | rest_of_decl_compilation (decl, 0, 0); |
51e29401 | 3450 | |
14077d68 ZW |
3451 | /* Write a record describing this implicit function declaration |
3452 | to the prototypes file (if requested). */ | |
51e29401 RS |
3453 | gen_aux_info_record (decl, 0, 1, 0); |
3454 | ||
6431177a JM |
3455 | /* Possibly apply some default attributes to this implicit declaration. */ |
3456 | decl_attributes (&decl, NULL_TREE, 0); | |
3457 | ||
51e29401 RS |
3458 | return decl; |
3459 | } | |
3460 | ||
9cd51ef6 ZW |
3461 | /* Issue an error message for a reference to an undeclared variable |
3462 | ID, including a reference to a builtin outside of function-call | |
3463 | context. Establish a binding of the identifier to error_mark_node | |
3464 | in an appropriate scope, which will suppress further errors for the | |
766beb40 | 3465 | same identifier. The error message should be given location LOC. */ |
9cd51ef6 | 3466 | void |
c2255bc4 | 3467 | undeclared_variable (location_t loc, tree id) |
9cd51ef6 ZW |
3468 | { |
3469 | static bool already = false; | |
f91f41b2 | 3470 | struct c_scope *scope; |
9cd51ef6 | 3471 | |
3fa8871b | 3472 | if (current_function_decl == NULL_TREE) |
9cd51ef6 | 3473 | { |
6c7a259b | 3474 | name_hint guessed_id = lookup_name_fuzzy (id, FUZZY_LOOKUP_NAME, loc); |
1a4f11c8 DM |
3475 | if (guessed_id) |
3476 | { | |
3477 | gcc_rich_location richloc (loc); | |
6c7a259b | 3478 | richloc.add_fixit_replace (guessed_id.suggestion ()); |
64a5912c DM |
3479 | error_at (&richloc, |
3480 | "%qE undeclared here (not in a function);" | |
3481 | " did you mean %qs?", | |
6c7a259b | 3482 | id, guessed_id.suggestion ()); |
1a4f11c8 DM |
3483 | } |
3484 | else | |
3485 | error_at (loc, "%qE undeclared here (not in a function)", id); | |
f91f41b2 | 3486 | scope = current_scope; |
9cd51ef6 ZW |
3487 | } |
3488 | else | |
3489 | { | |
90fbfdc3 | 3490 | if (!objc_diagnose_private_ivar (id)) |
1a4f11c8 | 3491 | { |
6c7a259b | 3492 | name_hint guessed_id = lookup_name_fuzzy (id, FUZZY_LOOKUP_NAME, loc); |
1a4f11c8 DM |
3493 | if (guessed_id) |
3494 | { | |
3495 | gcc_rich_location richloc (loc); | |
6c7a259b | 3496 | richloc.add_fixit_replace (guessed_id.suggestion ()); |
64a5912c DM |
3497 | error_at (&richloc, |
3498 | "%qE undeclared (first use in this function);" | |
3499 | " did you mean %qs?", | |
6c7a259b | 3500 | id, guessed_id.suggestion ()); |
1a4f11c8 DM |
3501 | } |
3502 | else | |
3503 | error_at (loc, "%qE undeclared (first use in this function)", id); | |
3504 | } | |
3f75a254 | 3505 | if (!already) |
9cd51ef6 | 3506 | { |
0b901e4c MLI |
3507 | inform (loc, "each undeclared identifier is reported only" |
3508 | " once for each function it appears in"); | |
9cd51ef6 ZW |
3509 | already = true; |
3510 | } | |
3511 | ||
f75fbaf7 | 3512 | /* If we are parsing old-style parameter decls, current_function_decl |
c22cacf3 | 3513 | will be nonnull but current_function_scope will be null. */ |
f75fbaf7 | 3514 | scope = current_function_scope ? current_function_scope : current_scope; |
9cd51ef6 | 3515 | } |
b3f27c15 JJ |
3516 | bind (id, error_mark_node, scope, /*invisible=*/false, /*nested=*/false, |
3517 | UNKNOWN_LOCATION); | |
9cd51ef6 | 3518 | } |
51e29401 | 3519 | \f |
14e33ee8 | 3520 | /* Subroutine of lookup_label, declare_label, define_label: construct a |
e1b7793c ILT |
3521 | LABEL_DECL with all the proper frills. Also create a struct |
3522 | c_label_vars initialized for the current scope. */ | |
14e33ee8 ZW |
3523 | |
3524 | static tree | |
e1b7793c ILT |
3525 | make_label (location_t location, tree name, bool defining, |
3526 | struct c_label_vars **p_label_vars) | |
14e33ee8 | 3527 | { |
c2255bc4 | 3528 | tree label = build_decl (location, LABEL_DECL, name, void_type_node); |
14e33ee8 | 3529 | DECL_CONTEXT (label) = current_function_decl; |
899ca90e | 3530 | SET_DECL_MODE (label, VOIDmode); |
14e33ee8 | 3531 | |
766090c2 | 3532 | c_label_vars *label_vars = ggc_alloc<c_label_vars> (); |
e1b7793c ILT |
3533 | label_vars->shadowed = NULL; |
3534 | set_spot_bindings (&label_vars->label_bindings, defining); | |
3535 | label_vars->decls_in_scope = make_tree_vector (); | |
9771b263 | 3536 | label_vars->gotos = NULL; |
e1b7793c ILT |
3537 | *p_label_vars = label_vars; |
3538 | ||
14e33ee8 ZW |
3539 | return label; |
3540 | } | |
3541 | ||
14e33ee8 | 3542 | /* Get the LABEL_DECL corresponding to identifier NAME as a label. |
51e29401 | 3543 | Create one if none exists so far for the current function. |
14e33ee8 ZW |
3544 | This is called when a label is used in a goto expression or |
3545 | has its address taken. */ | |
51e29401 RS |
3546 | |
3547 | tree | |
14e33ee8 | 3548 | lookup_label (tree name) |
51e29401 | 3549 | { |
14e33ee8 | 3550 | tree label; |
e1b7793c | 3551 | struct c_label_vars *label_vars; |
51e29401 | 3552 | |
c58e98c8 | 3553 | if (current_function_scope == 0) |
7d9795e5 | 3554 | { |
c51a1ba9 | 3555 | error ("label %qE referenced outside of any function", name); |
2f3bb934 | 3556 | return NULL_TREE; |
7d9795e5 RS |
3557 | } |
3558 | ||
14e33ee8 ZW |
3559 | /* Use a label already defined or ref'd with this name, but not if |
3560 | it is inherited from a containing function and wasn't declared | |
3561 | using __label__. */ | |
f75fbaf7 | 3562 | label = I_LABEL_DECL (name); |
14e33ee8 ZW |
3563 | if (label && (DECL_CONTEXT (label) == current_function_decl |
3564 | || C_DECLARED_LABEL_FLAG (label))) | |
51e29401 | 3565 | { |
14e33ee8 ZW |
3566 | /* If the label has only been declared, update its apparent |
3567 | location to point here, for better diagnostics if it | |
3568 | turns out not to have been defined. */ | |
e1b7793c | 3569 | if (DECL_INITIAL (label) == NULL_TREE) |
f31686a3 | 3570 | DECL_SOURCE_LOCATION (label) = input_location; |
14e33ee8 | 3571 | return label; |
51e29401 RS |
3572 | } |
3573 | ||
14e33ee8 | 3574 | /* No label binding for that identifier; make one. */ |
e1b7793c | 3575 | label = make_label (input_location, name, false, &label_vars); |
51e29401 | 3576 | |
14077d68 | 3577 | /* Ordinary labels go in the current function scope. */ |
e1b7793c ILT |
3578 | bind_label (name, label, current_function_scope, label_vars); |
3579 | ||
3580 | return label; | |
3581 | } | |
3582 | ||
3583 | /* Issue a warning about DECL for a goto statement at GOTO_LOC going | |
3584 | to LABEL. */ | |
3585 | ||
3586 | static void | |
3587 | warn_about_goto (location_t goto_loc, tree label, tree decl) | |
3588 | { | |
3589 | if (variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) | |
3590 | error_at (goto_loc, | |
3591 | "jump into scope of identifier with variably modified type"); | |
3592 | else | |
3593 | warning_at (goto_loc, OPT_Wjump_misses_init, | |
3594 | "jump skips variable initialization"); | |
3595 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", label); | |
3596 | inform (DECL_SOURCE_LOCATION (decl), "%qD declared here", decl); | |
3597 | } | |
3598 | ||
3599 | /* Look up a label because of a goto statement. This is like | |
3600 | lookup_label, but also issues any appropriate warnings. */ | |
3601 | ||
3602 | tree | |
3603 | lookup_label_for_goto (location_t loc, tree name) | |
3604 | { | |
3605 | tree label; | |
3606 | struct c_label_vars *label_vars; | |
3607 | unsigned int ix; | |
3608 | tree decl; | |
3609 | ||
3610 | label = lookup_label (name); | |
3611 | if (label == NULL_TREE) | |
3612 | return NULL_TREE; | |
3613 | ||
3614 | /* If we are jumping to a different function, we can't issue any | |
3615 | useful warnings. */ | |
3616 | if (DECL_CONTEXT (label) != current_function_decl) | |
3617 | { | |
3618 | gcc_assert (C_DECLARED_LABEL_FLAG (label)); | |
3619 | return label; | |
3620 | } | |
3621 | ||
3622 | label_vars = I_LABEL_BINDING (name)->u.label; | |
3623 | ||
3624 | /* If the label has not yet been defined, then push this goto on a | |
3625 | list for possible later warnings. */ | |
3626 | if (label_vars->label_bindings.scope == NULL) | |
3627 | { | |
766090c2 | 3628 | c_goto_bindings *g = ggc_alloc<c_goto_bindings> (); |
e1b7793c | 3629 | |
e1b7793c ILT |
3630 | g->loc = loc; |
3631 | set_spot_bindings (&g->goto_bindings, true); | |
9771b263 | 3632 | vec_safe_push (label_vars->gotos, g); |
e1b7793c ILT |
3633 | return label; |
3634 | } | |
3635 | ||
3636 | /* If there are any decls in label_vars->decls_in_scope, then this | |
3637 | goto has missed the declaration of the decl. This happens for a | |
3638 | case like | |
3639 | int i = 1; | |
3640 | lab: | |
3641 | ... | |
3642 | goto lab; | |
3643 | Issue a warning or error. */ | |
9771b263 | 3644 | FOR_EACH_VEC_SAFE_ELT (label_vars->decls_in_scope, ix, decl) |
e1b7793c ILT |
3645 | warn_about_goto (loc, label, decl); |
3646 | ||
3647 | if (label_vars->label_bindings.left_stmt_expr) | |
3648 | { | |
3649 | error_at (loc, "jump into statement expression"); | |
3650 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", label); | |
3651 | } | |
3652 | ||
14e33ee8 | 3653 | return label; |
51e29401 RS |
3654 | } |
3655 | ||
14e33ee8 ZW |
3656 | /* Make a label named NAME in the current function, shadowing silently |
3657 | any that may be inherited from containing functions or containing | |
3658 | scopes. This is called for __label__ declarations. */ | |
51e29401 | 3659 | |
51e29401 | 3660 | tree |
14e33ee8 | 3661 | declare_label (tree name) |
51e29401 | 3662 | { |
f75fbaf7 ZW |
3663 | struct c_binding *b = I_LABEL_BINDING (name); |
3664 | tree label; | |
e1b7793c | 3665 | struct c_label_vars *label_vars; |
51e29401 | 3666 | |
14e33ee8 ZW |
3667 | /* Check to make sure that the label hasn't already been declared |
3668 | at this scope */ | |
9aaabf8a | 3669 | if (b && B_IN_CURRENT_SCOPE (b)) |
f75fbaf7 | 3670 | { |
c51a1ba9 | 3671 | error ("duplicate label declaration %qE", name); |
71205d17 | 3672 | locate_old_decl (b->decl); |
a784882b | 3673 | |
f75fbaf7 ZW |
3674 | /* Just use the previous declaration. */ |
3675 | return b->decl; | |
3676 | } | |
a784882b | 3677 | |
e1b7793c | 3678 | label = make_label (input_location, name, false, &label_vars); |
14e33ee8 | 3679 | C_DECLARED_LABEL_FLAG (label) = 1; |
51e29401 | 3680 | |
14e33ee8 | 3681 | /* Declared labels go in the current scope. */ |
e1b7793c ILT |
3682 | bind_label (name, label, current_scope, label_vars); |
3683 | ||
14e33ee8 | 3684 | return label; |
51e29401 RS |
3685 | } |
3686 | ||
e1b7793c ILT |
3687 | /* When we define a label, issue any appropriate warnings if there are |
3688 | any gotos earlier in the function which jump to this label. */ | |
3689 | ||
3690 | static void | |
3691 | check_earlier_gotos (tree label, struct c_label_vars* label_vars) | |
3692 | { | |
3693 | unsigned int ix; | |
3694 | struct c_goto_bindings *g; | |
3695 | ||
9771b263 | 3696 | FOR_EACH_VEC_SAFE_ELT (label_vars->gotos, ix, g) |
e1b7793c ILT |
3697 | { |
3698 | struct c_binding *b; | |
3699 | struct c_scope *scope; | |
3700 | ||
3701 | /* We have a goto to this label. The goto is going forward. In | |
3702 | g->scope, the goto is going to skip any binding which was | |
3703 | defined after g->bindings_in_scope. */ | |
744f0946 | 3704 | if (g->goto_bindings.scope->has_jump_unsafe_decl) |
e1b7793c | 3705 | { |
744f0946 ILT |
3706 | for (b = g->goto_bindings.scope->bindings; |
3707 | b != g->goto_bindings.bindings_in_scope; | |
3708 | b = b->prev) | |
3709 | { | |
3710 | if (decl_jump_unsafe (b->decl)) | |
3711 | warn_about_goto (g->loc, label, b->decl); | |
3712 | } | |
e1b7793c ILT |
3713 | } |
3714 | ||
3715 | /* We also need to warn about decls defined in any scopes | |
3716 | between the scope of the label and the scope of the goto. */ | |
3717 | for (scope = label_vars->label_bindings.scope; | |
3718 | scope != g->goto_bindings.scope; | |
3719 | scope = scope->outer) | |
3720 | { | |
3721 | gcc_assert (scope != NULL); | |
744f0946 | 3722 | if (scope->has_jump_unsafe_decl) |
e1b7793c | 3723 | { |
744f0946 ILT |
3724 | if (scope == label_vars->label_bindings.scope) |
3725 | b = label_vars->label_bindings.bindings_in_scope; | |
3726 | else | |
3727 | b = scope->bindings; | |
3728 | for (; b != NULL; b = b->prev) | |
3729 | { | |
3730 | if (decl_jump_unsafe (b->decl)) | |
3731 | warn_about_goto (g->loc, label, b->decl); | |
3732 | } | |
e1b7793c ILT |
3733 | } |
3734 | } | |
3735 | ||
3736 | if (g->goto_bindings.stmt_exprs > 0) | |
3737 | { | |
3738 | error_at (g->loc, "jump into statement expression"); | |
3739 | inform (DECL_SOURCE_LOCATION (label), "label %qD defined here", | |
3740 | label); | |
3741 | } | |
3742 | } | |
3743 | ||
3744 | /* Now that the label is defined, we will issue warnings about | |
3745 | subsequent gotos to this label when we see them. */ | |
9771b263 | 3746 | vec_safe_truncate (label_vars->gotos, 0); |
e1b7793c ILT |
3747 | label_vars->gotos = NULL; |
3748 | } | |
3749 | ||
51e29401 RS |
3750 | /* Define a label, specifying the location in the source file. |
3751 | Return the LABEL_DECL node for the label, if the definition is valid. | |
6574d78e | 3752 | Otherwise return NULL_TREE. */ |
51e29401 RS |
3753 | |
3754 | tree | |
5b030314 | 3755 | define_label (location_t location, tree name) |
51e29401 | 3756 | { |
14e33ee8 ZW |
3757 | /* Find any preexisting label with this name. It is an error |
3758 | if that label has already been defined in this function, or | |
3759 | if there is a containing function with a declared label with | |
3760 | the same name. */ | |
f75fbaf7 | 3761 | tree label = I_LABEL_DECL (name); |
14e33ee8 ZW |
3762 | |
3763 | if (label | |
3764 | && ((DECL_CONTEXT (label) == current_function_decl | |
3fa8871b | 3765 | && DECL_INITIAL (label) != NULL_TREE) |
14e33ee8 ZW |
3766 | || (DECL_CONTEXT (label) != current_function_decl |
3767 | && C_DECLARED_LABEL_FLAG (label)))) | |
51e29401 | 3768 | { |
c2255bc4 | 3769 | error_at (location, "duplicate label %qD", label); |
71205d17 | 3770 | locate_old_decl (label); |
6574d78e | 3771 | return NULL_TREE; |
51e29401 | 3772 | } |
14e33ee8 | 3773 | else if (label && DECL_CONTEXT (label) == current_function_decl) |
51e29401 | 3774 | { |
e1b7793c ILT |
3775 | struct c_label_vars *label_vars = I_LABEL_BINDING (name)->u.label; |
3776 | ||
14e33ee8 ZW |
3777 | /* The label has been used or declared already in this function, |
3778 | but not defined. Update its location to point to this | |
3779 | definition. */ | |
f31686a3 | 3780 | DECL_SOURCE_LOCATION (label) = location; |
e1b7793c ILT |
3781 | set_spot_bindings (&label_vars->label_bindings, true); |
3782 | ||
3783 | /* Issue warnings as required about any goto statements from | |
3784 | earlier in the function. */ | |
3785 | check_earlier_gotos (label, label_vars); | |
51e29401 RS |
3786 | } |
3787 | else | |
3788 | { | |
e1b7793c ILT |
3789 | struct c_label_vars *label_vars; |
3790 | ||
14e33ee8 | 3791 | /* No label binding for that identifier; make one. */ |
e1b7793c | 3792 | label = make_label (location, name, true, &label_vars); |
14e33ee8 | 3793 | |
14077d68 | 3794 | /* Ordinary labels go in the current function scope. */ |
e1b7793c | 3795 | bind_label (name, label, current_function_scope, label_vars); |
51e29401 | 3796 | } |
14e33ee8 | 3797 | |
8400e75e | 3798 | if (!in_system_header_at (input_location) && lookup_name (name)) |
c2255bc4 AH |
3799 | warning_at (location, OPT_Wtraditional, |
3800 | "traditional C lacks a separate namespace " | |
3801 | "for labels, identifier %qE conflicts", name); | |
14e33ee8 ZW |
3802 | |
3803 | /* Mark label as having been defined. */ | |
3804 | DECL_INITIAL (label) = error_mark_node; | |
3805 | return label; | |
51e29401 | 3806 | } |
51e29401 | 3807 | \f |
e1b7793c ILT |
3808 | /* Get the bindings for a new switch statement. This is used to issue |
3809 | warnings as appropriate for jumps from the switch to case or | |
3810 | default labels. */ | |
3811 | ||
3812 | struct c_spot_bindings * | |
3813 | c_get_switch_bindings (void) | |
3814 | { | |
3815 | struct c_spot_bindings *switch_bindings; | |
3816 | ||
3817 | switch_bindings = XNEW (struct c_spot_bindings); | |
3818 | set_spot_bindings (switch_bindings, true); | |
3819 | return switch_bindings; | |
3820 | } | |
3821 | ||
3822 | void | |
3823 | c_release_switch_bindings (struct c_spot_bindings *bindings) | |
3824 | { | |
3825 | gcc_assert (bindings->stmt_exprs == 0 && !bindings->left_stmt_expr); | |
3826 | XDELETE (bindings); | |
3827 | } | |
3828 | ||
3829 | /* This is called at the point of a case or default label to issue | |
3830 | warnings about decls as needed. It returns true if it found an | |
3831 | error, not just a warning. */ | |
3832 | ||
3833 | bool | |
3834 | c_check_switch_jump_warnings (struct c_spot_bindings *switch_bindings, | |
3835 | location_t switch_loc, location_t case_loc) | |
3836 | { | |
3837 | bool saw_error; | |
3838 | struct c_scope *scope; | |
3839 | ||
3840 | saw_error = false; | |
3841 | for (scope = current_scope; | |
3842 | scope != switch_bindings->scope; | |
3843 | scope = scope->outer) | |
3844 | { | |
3845 | struct c_binding *b; | |
3846 | ||
3847 | gcc_assert (scope != NULL); | |
744f0946 ILT |
3848 | |
3849 | if (!scope->has_jump_unsafe_decl) | |
3850 | continue; | |
3851 | ||
e1b7793c ILT |
3852 | for (b = scope->bindings; b != NULL; b = b->prev) |
3853 | { | |
3854 | if (decl_jump_unsafe (b->decl)) | |
3855 | { | |
3856 | if (variably_modified_type_p (TREE_TYPE (b->decl), NULL_TREE)) | |
3857 | { | |
3858 | saw_error = true; | |
3859 | error_at (case_loc, | |
3860 | ("switch jumps into scope of identifier with " | |
3861 | "variably modified type")); | |
3862 | } | |
3863 | else | |
3864 | warning_at (case_loc, OPT_Wjump_misses_init, | |
3865 | "switch jumps over variable initialization"); | |
3866 | inform (switch_loc, "switch starts here"); | |
3867 | inform (DECL_SOURCE_LOCATION (b->decl), "%qD declared here", | |
3868 | b->decl); | |
3869 | } | |
3870 | } | |
3871 | } | |
3872 | ||
3873 | if (switch_bindings->stmt_exprs > 0) | |
3874 | { | |
3875 | saw_error = true; | |
3876 | error_at (case_loc, "switch jumps into statement expression"); | |
3877 | inform (switch_loc, "switch starts here"); | |
3878 | } | |
3879 | ||
3880 | return saw_error; | |
3881 | } | |
3882 | \f | |
51e29401 RS |
3883 | /* Given NAME, an IDENTIFIER_NODE, |
3884 | return the structure (or union or enum) definition for that name. | |
f8521984 | 3885 | If THISLEVEL_ONLY is nonzero, searches only the current_scope. |
51e29401 RS |
3886 | CODE says which kind of type the caller wants; |
3887 | it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE. | |
24b97832 ILT |
3888 | If PLOC is not NULL and this returns non-null, it sets *PLOC to the |
3889 | location where the tag was defined. | |
51e29401 RS |
3890 | If the wrong kind of type is found, an error is reported. */ |
3891 | ||
3892 | static tree | |
2f3bb934 | 3893 | lookup_tag (enum tree_code code, tree name, bool thislevel_only, |
24b97832 | 3894 | location_t *ploc) |
51e29401 | 3895 | { |
f75fbaf7 | 3896 | struct c_binding *b = I_TAG_BINDING (name); |
2f3bb934 | 3897 | bool thislevel = false; |
51e29401 | 3898 | |
f75fbaf7 | 3899 | if (!b || !b->decl) |
2f3bb934 | 3900 | return NULL_TREE; |
339a28b9 ZW |
3901 | |
3902 | /* We only care about whether it's in this level if | |
3903 | thislevel_only was set or it might be a type clash. */ | |
f75fbaf7 ZW |
3904 | if (thislevel_only || TREE_CODE (b->decl) != code) |
3905 | { | |
3906 | /* For our purposes, a tag in the external scope is the same as | |
3907 | a tag in the file scope. (Primarily relevant to Objective-C | |
3908 | and its builtin structure tags, which get pushed before the | |
118a3a8b | 3909 | file scope is created.) */ |
9aaabf8a ZW |
3910 | if (B_IN_CURRENT_SCOPE (b) |
3911 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
2f3bb934 | 3912 | thislevel = true; |
51e29401 | 3913 | } |
339a28b9 ZW |
3914 | |
3915 | if (thislevel_only && !thislevel) | |
2f3bb934 | 3916 | return NULL_TREE; |
339a28b9 | 3917 | |
f75fbaf7 | 3918 | if (TREE_CODE (b->decl) != code) |
339a28b9 ZW |
3919 | { |
3920 | /* Definition isn't the kind we were looking for. */ | |
3921 | pending_invalid_xref = name; | |
070588f0 | 3922 | pending_invalid_xref_location = input_location; |
339a28b9 ZW |
3923 | |
3924 | /* If in the same binding level as a declaration as a tag | |
3925 | of a different type, this must not be allowed to | |
3926 | shadow that tag, so give the error immediately. | |
3927 | (For example, "struct foo; union foo;" is invalid.) */ | |
3928 | if (thislevel) | |
3929 | pending_xref_error (); | |
3930 | } | |
24b97832 ILT |
3931 | |
3932 | if (ploc != NULL) | |
3933 | *ploc = b->locus; | |
3934 | ||
f75fbaf7 | 3935 | return b->decl; |
51e29401 RS |
3936 | } |
3937 | ||
0e36f5c7 MP |
3938 | /* Return true if a definition exists for NAME with code CODE. */ |
3939 | ||
3940 | bool | |
3941 | tag_exists_p (enum tree_code code, tree name) | |
3942 | { | |
3943 | struct c_binding *b = I_TAG_BINDING (name); | |
3944 | ||
3945 | if (b == NULL || b->decl == NULL_TREE) | |
3946 | return false; | |
3947 | return TREE_CODE (b->decl) == code; | |
3948 | } | |
3949 | ||
51e29401 RS |
3950 | /* Print an error message now |
3951 | for a recent invalid struct, union or enum cross reference. | |
3952 | We don't print them immediately because they are not invalid | |
3953 | when used in the `struct foo;' construct for shadowing. */ | |
3954 | ||
3955 | void | |
35b1a6fa | 3956 | pending_xref_error (void) |
51e29401 | 3957 | { |
3fa8871b | 3958 | if (pending_invalid_xref != NULL_TREE) |
fab922b1 MLI |
3959 | error_at (pending_invalid_xref_location, "%qE defined as wrong kind of tag", |
3960 | pending_invalid_xref); | |
3fa8871b | 3961 | pending_invalid_xref = NULL_TREE; |
51e29401 RS |
3962 | } |
3963 | ||
51e29401 | 3964 | \f |
f8521984 | 3965 | /* Look up NAME in the current scope and its superiors |
51e29401 RS |
3966 | in the namespace of variables, functions and typedefs. |
3967 | Return a ..._DECL node of some kind representing its definition, | |
6574d78e | 3968 | or return NULL_TREE if it is undefined. */ |
51e29401 RS |
3969 | |
3970 | tree | |
35b1a6fa | 3971 | lookup_name (tree name) |
51e29401 | 3972 | { |
f75fbaf7 | 3973 | struct c_binding *b = I_SYMBOL_BINDING (name); |
9aaabf8a | 3974 | if (b && !b->invisible) |
3797cb21 DS |
3975 | { |
3976 | maybe_record_typedef_use (b->decl); | |
3977 | return b->decl; | |
3978 | } | |
2f3bb934 | 3979 | return NULL_TREE; |
51e29401 RS |
3980 | } |
3981 | ||
f75fbaf7 | 3982 | /* Similar to `lookup_name' but look only at the indicated scope. */ |
51e29401 | 3983 | |
339a28b9 | 3984 | static tree |
f75fbaf7 | 3985 | lookup_name_in_scope (tree name, struct c_scope *scope) |
51e29401 | 3986 | { |
f75fbaf7 | 3987 | struct c_binding *b; |
339a28b9 | 3988 | |
f75fbaf7 | 3989 | for (b = I_SYMBOL_BINDING (name); b; b = b->shadowed) |
9aaabf8a | 3990 | if (B_IN_SCOPE (b, scope)) |
f75fbaf7 | 3991 | return b->decl; |
2f3bb934 | 3992 | return NULL_TREE; |
51e29401 | 3993 | } |
1a4f11c8 | 3994 | |
1a4f11c8 DM |
3995 | /* Look for the closest match for NAME within the currently valid |
3996 | scopes. | |
3997 | ||
3998 | This finds the identifier with the lowest Levenshtein distance to | |
3999 | NAME. If there are multiple candidates with equal minimal distance, | |
4000 | the first one found is returned. Scopes are searched from innermost | |
4001 | outwards, and within a scope in reverse order of declaration, thus | |
4002 | benefiting candidates "near" to the current scope. | |
4003 | ||
4004 | The function also looks for similar macro names to NAME, since a | |
4005 | misspelled macro name will not be expanded, and hence looks like an | |
4006 | identifier to the C frontend. | |
4007 | ||
4008 | It also looks for start_typename keywords, to detect "singed" vs "signed" | |
b1212255 DM |
4009 | typos. |
4010 | ||
4011 | Use LOC for any deferred diagnostics. */ | |
1a4f11c8 | 4012 | |
6c7a259b | 4013 | name_hint |
b1212255 | 4014 | lookup_name_fuzzy (tree name, enum lookup_name_fuzzy_kind kind, location_t loc) |
1a4f11c8 DM |
4015 | { |
4016 | gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE); | |
4017 | ||
b1212255 DM |
4018 | /* First, try some well-known names in the C standard library, in case |
4019 | the user forgot a #include. */ | |
26edace6 DM |
4020 | const char *header_hint |
4021 | = get_c_stdlib_header_for_name (IDENTIFIER_POINTER (name)); | |
4022 | ||
b1212255 DM |
4023 | if (header_hint) |
4024 | return name_hint (NULL, | |
4025 | new suggest_missing_header (loc, | |
4026 | IDENTIFIER_POINTER (name), | |
4027 | header_hint)); | |
4028 | ||
1a4f11c8 DM |
4029 | best_match<tree, tree> bm (name); |
4030 | ||
4031 | /* Look within currently valid scopes. */ | |
4032 | for (c_scope *scope = current_scope; scope; scope = scope->outer) | |
4033 | for (c_binding *binding = scope->bindings; binding; binding = binding->prev) | |
4034 | { | |
dd36b877 | 4035 | if (!binding->id || binding->invisible) |
1a4f11c8 | 4036 | continue; |
d4300cc6 DM |
4037 | if (binding->decl == error_mark_node) |
4038 | continue; | |
1a4f11c8 DM |
4039 | /* Don't use bindings from implicitly declared functions, |
4040 | as they were likely misspellings themselves. */ | |
4041 | if (TREE_CODE (binding->decl) == FUNCTION_DECL) | |
4042 | if (C_DECL_IMPLICIT (binding->decl)) | |
4043 | continue; | |
ddbbcb19 JJ |
4044 | switch (kind) |
4045 | { | |
4046 | case FUZZY_LOOKUP_TYPENAME: | |
4047 | if (TREE_CODE (binding->decl) != TYPE_DECL) | |
4048 | continue; | |
4049 | break; | |
4050 | ||
4051 | case FUZZY_LOOKUP_FUNCTION_NAME: | |
4052 | if (TREE_CODE (binding->decl) != FUNCTION_DECL) | |
4053 | { | |
4054 | /* Allow function pointers. */ | |
4055 | if ((VAR_P (binding->decl) | |
4056 | || TREE_CODE (binding->decl) == PARM_DECL) | |
4057 | && TREE_CODE (TREE_TYPE (binding->decl)) == POINTER_TYPE | |
4058 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (binding->decl))) | |
4059 | == FUNCTION_TYPE)) | |
4060 | break; | |
4061 | continue; | |
4062 | } | |
4063 | break; | |
4064 | ||
4065 | default: | |
4066 | break; | |
4067 | } | |
1a4f11c8 DM |
4068 | bm.consider (binding->id); |
4069 | } | |
4070 | ||
4071 | /* Consider macros: if the user misspelled a macro name e.g. "SOME_MACRO" | |
4072 | as: | |
4073 | x = SOME_OTHER_MACRO (y); | |
4074 | then "SOME_OTHER_MACRO" will survive to the frontend and show up | |
4075 | as a misspelled identifier. | |
4076 | ||
4077 | Use the best distance so far so that a candidate is only set if | |
4078 | a macro is better than anything so far. This allows early rejection | |
4079 | (without calculating the edit distance) of macro names that must have | |
4080 | distance >= bm.get_best_distance (), and means that we only get a | |
4081 | non-NULL result for best_macro_match if it's better than any of | |
4082 | the identifiers already checked, which avoids needless creation | |
4083 | of identifiers for macro hashnodes. */ | |
7c8f7eaa | 4084 | best_macro_match bmm (name, bm.get_best_distance (), parse_in); |
1a4f11c8 DM |
4085 | cpp_hashnode *best_macro = bmm.get_best_meaningful_candidate (); |
4086 | /* If a macro is the closest so far to NAME, use it, creating an | |
4087 | identifier tree node for it. */ | |
4088 | if (best_macro) | |
4089 | { | |
4090 | const char *id = (const char *)best_macro->ident.str; | |
4091 | tree macro_as_identifier | |
4092 | = get_identifier_with_length (id, best_macro->ident.len); | |
4093 | bm.set_best_so_far (macro_as_identifier, | |
4094 | bmm.get_best_distance (), | |
4095 | bmm.get_best_candidate_length ()); | |
4096 | } | |
4097 | ||
4098 | /* Try the "start_typename" keywords to detect | |
4099 | "singed" vs "signed" typos. */ | |
4100 | if (kind == FUZZY_LOOKUP_TYPENAME) | |
4101 | { | |
4102 | for (unsigned i = 0; i < num_c_common_reswords; i++) | |
4103 | { | |
4104 | const c_common_resword *resword = &c_common_reswords[i]; | |
4105 | if (!c_keyword_starts_typename (resword->rid)) | |
4106 | continue; | |
4107 | tree resword_identifier = ridpointers [resword->rid]; | |
4108 | if (!resword_identifier) | |
4109 | continue; | |
4110 | gcc_assert (TREE_CODE (resword_identifier) == IDENTIFIER_NODE); | |
4111 | bm.consider (resword_identifier); | |
4112 | } | |
4113 | } | |
4114 | ||
de6a69ee DM |
4115 | tree best = bm.get_best_meaningful_candidate (); |
4116 | if (best) | |
6c7a259b | 4117 | return name_hint (IDENTIFIER_POINTER (best), NULL); |
de6a69ee | 4118 | else |
6c7a259b | 4119 | return name_hint (NULL, NULL); |
1a4f11c8 DM |
4120 | } |
4121 | ||
51e29401 RS |
4122 | \f |
4123 | /* Create the predefined scalar types of C, | |
0f41302f | 4124 | and some nodes representing standard constants (0, 1, (void *) 0). |
f8521984 | 4125 | Initialize the global scope. |
51e29401 RS |
4126 | Make definitions for built-in primitive functions. */ |
4127 | ||
4128 | void | |
35b1a6fa | 4129 | c_init_decl_processing (void) |
51e29401 | 4130 | { |
4714db5a | 4131 | location_t save_loc = input_location; |
e13e48e7 | 4132 | |
27bf414c | 4133 | /* Initialize reserved words for parser. */ |
f5e99456 NB |
4134 | c_parse_init (); |
4135 | ||
3fa8871b | 4136 | current_function_decl = NULL_TREE; |
6645c3fa | 4137 | |
bc4b653b JM |
4138 | gcc_obstack_init (&parser_obstack); |
4139 | ||
f75fbaf7 ZW |
4140 | /* Make the externals scope. */ |
4141 | push_scope (); | |
4142 | external_scope = current_scope; | |
14077d68 | 4143 | |
e3091a5f R |
4144 | /* Declarations from c_common_nodes_and_builtins must not be associated |
4145 | with this input file, lest we get differences between using and not | |
4146 | using preprocessed headers. */ | |
3c20847b | 4147 | input_location = BUILTINS_LOCATION; |
51e29401 | 4148 | |
eaa7c03f | 4149 | c_common_nodes_and_builtins (); |
51e29401 | 4150 | |
de7df9eb JM |
4151 | /* In C, comparisons and TRUTH_* expressions have type int. */ |
4152 | truthvalue_type_node = integer_type_node; | |
4153 | truthvalue_true_node = integer_one_node; | |
4154 | truthvalue_false_node = integer_zero_node; | |
4155 | ||
4156 | /* Even in C99, which has a real boolean type. */ | |
c2255bc4 | 4157 | pushdecl (build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier ("_Bool"), |
de7df9eb | 4158 | boolean_type_node)); |
19552aa5 | 4159 | |
4714db5a | 4160 | input_location = save_loc; |
e3091a5f | 4161 | |
2ce07e2d | 4162 | make_fname_decl = c_make_fname_decl; |
0ba8a114 | 4163 | start_fname_decls (); |
51e29401 RS |
4164 | } |
4165 | ||
c2255bc4 AH |
4166 | /* Create the VAR_DECL at LOC for __FUNCTION__ etc. ID is the name to |
4167 | give the decl, NAME is the initialization string and TYPE_DEP | |
4168 | indicates whether NAME depended on the type of the function. As we | |
4169 | don't yet implement delayed emission of static data, we mark the | |
4170 | decl as emitted so it is not placed in the output. Anything using | |
4171 | it must therefore pull out the STRING_CST initializer directly. | |
4172 | FIXME. */ | |
2ce07e2d NS |
4173 | |
4174 | static tree | |
c2255bc4 | 4175 | c_make_fname_decl (location_t loc, tree id, int type_dep) |
2ce07e2d | 4176 | { |
0ba8a114 | 4177 | const char *name = fname_as_string (type_dep); |
2ce07e2d NS |
4178 | tree decl, type, init; |
4179 | size_t length = strlen (name); | |
4180 | ||
46df2823 JM |
4181 | type = build_array_type (char_type_node, |
4182 | build_index_type (size_int (length))); | |
4183 | type = c_build_qualified_type (type, TYPE_QUAL_CONST); | |
2ce07e2d | 4184 | |
c2255bc4 | 4185 | decl = build_decl (loc, VAR_DECL, id, type); |
35b1a6fa | 4186 | |
2ce07e2d NS |
4187 | TREE_STATIC (decl) = 1; |
4188 | TREE_READONLY (decl) = 1; | |
2ce07e2d | 4189 | DECL_ARTIFICIAL (decl) = 1; |
35b1a6fa | 4190 | |
2ce07e2d | 4191 | init = build_string (length + 1, name); |
b1d5455a | 4192 | free (CONST_CAST (char *, name)); |
2ce07e2d NS |
4193 | TREE_TYPE (init) = type; |
4194 | DECL_INITIAL (decl) = init; | |
0ba8a114 NS |
4195 | |
4196 | TREE_USED (decl) = 1; | |
6cce57b0 | 4197 | |
1a4259dc JH |
4198 | if (current_function_decl |
4199 | /* For invalid programs like this: | |
b8698a0f | 4200 | |
1a4259dc JH |
4201 | void foo() |
4202 | const char* p = __FUNCTION__; | |
b8698a0f | 4203 | |
1a4259dc JH |
4204 | the __FUNCTION__ is believed to appear in K&R style function |
4205 | parameter declarator. In that case we still don't have | |
4206 | function_scope. */ | |
95efe6b6 | 4207 | && current_function_scope) |
f91f41b2 ZW |
4208 | { |
4209 | DECL_CONTEXT (decl) = current_function_decl; | |
9aaabf8a | 4210 | bind (id, decl, current_function_scope, |
b3f27c15 | 4211 | /*invisible=*/false, /*nested=*/false, UNKNOWN_LOCATION); |
f91f41b2 | 4212 | } |
339a28b9 | 4213 | |
c2255bc4 | 4214 | finish_decl (decl, loc, init, NULL_TREE, NULL_TREE); |
6645c3fa | 4215 | |
2ce07e2d NS |
4216 | return decl; |
4217 | } | |
4218 | ||
929f3671 | 4219 | tree |
c79efc4d | 4220 | c_builtin_function (tree decl) |
51e29401 | 4221 | { |
c79efc4d RÁE |
4222 | tree type = TREE_TYPE (decl); |
4223 | tree id = DECL_NAME (decl); | |
4224 | ||
4225 | const char *name = IDENTIFIER_POINTER (id); | |
f4da8dce | 4226 | C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type); |
26db82d8 | 4227 | |
f75fbaf7 | 4228 | /* Should never be called on a symbol with a preexisting meaning. */ |
366de0ce | 4229 | gcc_assert (!I_SYMBOL_BINDING (id)); |
f75fbaf7 | 4230 | |
b3f27c15 JJ |
4231 | bind (id, decl, external_scope, /*invisible=*/true, /*nested=*/false, |
4232 | UNKNOWN_LOCATION); | |
f75fbaf7 | 4233 | |
5779e713 MM |
4234 | /* Builtins in the implementation namespace are made visible without |
4235 | needing to be explicitly declared. See push_file_scope. */ | |
4236 | if (name[0] == '_' && (name[1] == '_' || ISUPPER (name[1]))) | |
4237 | { | |
910ad8de | 4238 | DECL_CHAIN (decl) = visible_builtins; |
5779e713 MM |
4239 | visible_builtins = decl; |
4240 | } | |
4241 | ||
4242 | return decl; | |
4243 | } | |
4244 | ||
4245 | tree | |
4246 | c_builtin_function_ext_scope (tree decl) | |
4247 | { | |
4248 | tree type = TREE_TYPE (decl); | |
4249 | tree id = DECL_NAME (decl); | |
4250 | ||
4251 | const char *name = IDENTIFIER_POINTER (id); | |
f4da8dce | 4252 | C_DECL_BUILTIN_PROTOTYPE (decl) = prototype_p (type); |
5779e713 | 4253 | |
0136f8f0 AH |
4254 | if (external_scope) |
4255 | bind (id, decl, external_scope, /*invisible=*/false, /*nested=*/false, | |
4256 | UNKNOWN_LOCATION); | |
5779e713 | 4257 | |
f75fbaf7 ZW |
4258 | /* Builtins in the implementation namespace are made visible without |
4259 | needing to be explicitly declared. See push_file_scope. */ | |
4260 | if (name[0] == '_' && (name[1] == '_' || ISUPPER (name[1]))) | |
4261 | { | |
910ad8de | 4262 | DECL_CHAIN (decl) = visible_builtins; |
f75fbaf7 ZW |
4263 | visible_builtins = decl; |
4264 | } | |
51e29401 RS |
4265 | |
4266 | return decl; | |
4267 | } | |
4268 | \f | |
4269 | /* Called when a declaration is seen that contains no names to declare. | |
4270 | If its type is a reference to a structure, union or enum inherited | |
4271 | from a containing scope, shadow that tag name for the current scope | |
4272 | with a forward reference. | |
4273 | If its type defines a new named structure or union | |
4274 | or defines an enum, it is valid but we need not do anything here. | |
4275 | Otherwise, it is an error. */ | |
4276 | ||
4277 | void | |
deb176fa | 4278 | shadow_tag (const struct c_declspecs *declspecs) |
9282f2f9 RS |
4279 | { |
4280 | shadow_tag_warned (declspecs, 0); | |
4281 | } | |
4282 | ||
0e6df31e GK |
4283 | /* WARNED is 1 if we have done a pedwarn, 2 if we have done a warning, |
4284 | but no pedwarn. */ | |
9282f2f9 | 4285 | void |
deb176fa | 4286 | shadow_tag_warned (const struct c_declspecs *declspecs, int warned) |
51e29401 | 4287 | { |
deb176fa | 4288 | bool found_tag = false; |
51e29401 | 4289 | |
98c3a782 | 4290 | if (declspecs->type && !declspecs->default_int_p && !declspecs->typedef_p) |
51e29401 | 4291 | { |
deb176fa | 4292 | tree value = declspecs->type; |
b3694847 | 4293 | enum tree_code code = TREE_CODE (value); |
51e29401 RS |
4294 | |
4295 | if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE) | |
4296 | /* Used to test also that TYPE_SIZE (value) != 0. | |
4297 | That caused warning for `struct foo;' at top level in the file. */ | |
4298 | { | |
339a28b9 | 4299 | tree name = TYPE_NAME (value); |
b3694847 | 4300 | tree t; |
51e29401 | 4301 | |
deb176fa | 4302 | found_tag = true; |
51e29401 | 4303 | |
da377db9 JM |
4304 | if (declspecs->restrict_p) |
4305 | { | |
4306 | error ("invalid use of %<restrict%>"); | |
4307 | warned = 1; | |
4308 | } | |
4309 | ||
3fa8871b | 4310 | if (name == NULL_TREE) |
51e29401 | 4311 | { |
773edaef RK |
4312 | if (warned != 1 && code != ENUMERAL_TYPE) |
4313 | /* Empty unnamed enum OK */ | |
51e29401 | 4314 | { |
509c9d60 MLI |
4315 | pedwarn (input_location, 0, |
4316 | "unnamed struct/union that defines no instances"); | |
51e29401 RS |
4317 | warned = 1; |
4318 | } | |
4319 | } | |
9e5b2115 PB |
4320 | else if (declspecs->typespec_kind != ctsk_tagdef |
4321 | && declspecs->typespec_kind != ctsk_tagfirstref | |
81da229b JM |
4322 | && declspecs->storage_class != csc_none) |
4323 | { | |
4324 | if (warned != 1) | |
509c9d60 MLI |
4325 | pedwarn (input_location, 0, |
4326 | "empty declaration with storage class specifier " | |
4327 | "does not redeclare tag"); | |
81da229b JM |
4328 | warned = 1; |
4329 | pending_xref_error (); | |
4330 | } | |
9e5b2115 PB |
4331 | else if (declspecs->typespec_kind != ctsk_tagdef |
4332 | && declspecs->typespec_kind != ctsk_tagfirstref | |
81da229b JM |
4333 | && (declspecs->const_p |
4334 | || declspecs->volatile_p | |
267bac10 | 4335 | || declspecs->atomic_p |
36c5e70a BE |
4336 | || declspecs->restrict_p |
4337 | || declspecs->address_space)) | |
81da229b JM |
4338 | { |
4339 | if (warned != 1) | |
509c9d60 MLI |
4340 | pedwarn (input_location, 0, |
4341 | "empty declaration with type qualifier " | |
fcf73884 | 4342 | "does not redeclare tag"); |
81da229b JM |
4343 | warned = 1; |
4344 | pending_xref_error (); | |
4345 | } | |
d19fa6b5 JM |
4346 | else if (declspecs->typespec_kind != ctsk_tagdef |
4347 | && declspecs->typespec_kind != ctsk_tagfirstref | |
4348 | && declspecs->alignas_p) | |
4349 | { | |
4350 | if (warned != 1) | |
4351 | pedwarn (input_location, 0, | |
4352 | "empty declaration with %<_Alignas%> " | |
4353 | "does not redeclare tag"); | |
4354 | warned = 1; | |
4355 | pending_xref_error (); | |
4356 | } | |
51e29401 RS |
4357 | else |
4358 | { | |
3fa8871b | 4359 | pending_invalid_xref = NULL_TREE; |
2f3bb934 | 4360 | t = lookup_tag (code, name, true, NULL); |
51e29401 | 4361 | |
2f3bb934 | 4362 | if (t == NULL_TREE) |
51e29401 RS |
4363 | { |
4364 | t = make_node (code); | |
c2255bc4 | 4365 | pushtag (input_location, name, t); |
51e29401 RS |
4366 | } |
4367 | } | |
4368 | } | |
4369 | else | |
4370 | { | |
8400e75e | 4371 | if (warned != 1 && !in_system_header_at (input_location)) |
773edaef | 4372 | { |
509c9d60 MLI |
4373 | pedwarn (input_location, 0, |
4374 | "useless type name in empty declaration"); | |
deb176fa | 4375 | warned = 1; |
773edaef | 4376 | } |
51e29401 RS |
4377 | } |
4378 | } | |
8400e75e DM |
4379 | else if (warned != 1 && !in_system_header_at (input_location) |
4380 | && declspecs->typedef_p) | |
deb176fa | 4381 | { |
509c9d60 | 4382 | pedwarn (input_location, 0, "useless type name in empty declaration"); |
deb176fa JM |
4383 | warned = 1; |
4384 | } | |
4385 | ||
3fa8871b | 4386 | pending_invalid_xref = NULL_TREE; |
81da229b | 4387 | |
9a26d6ee JM |
4388 | if (declspecs->inline_p) |
4389 | { | |
4390 | error ("%<inline%> in empty declaration"); | |
4391 | warned = 1; | |
4392 | } | |
4393 | ||
bbceee64 JM |
4394 | if (declspecs->noreturn_p) |
4395 | { | |
4396 | error ("%<_Noreturn%> in empty declaration"); | |
4397 | warned = 1; | |
4398 | } | |
4399 | ||
9a26d6ee JM |
4400 | if (current_scope == file_scope && declspecs->storage_class == csc_auto) |
4401 | { | |
4402 | error ("%<auto%> in file-scope empty declaration"); | |
4403 | warned = 1; | |
4404 | } | |
4405 | ||
4406 | if (current_scope == file_scope && declspecs->storage_class == csc_register) | |
4407 | { | |
4408 | error ("%<register%> in file-scope empty declaration"); | |
4409 | warned = 1; | |
4410 | } | |
4411 | ||
8400e75e DM |
4412 | if (!warned && !in_system_header_at (input_location) |
4413 | && declspecs->storage_class != csc_none) | |
9a26d6ee | 4414 | { |
d4ee4d25 | 4415 | warning (0, "useless storage class specifier in empty declaration"); |
9a26d6ee JM |
4416 | warned = 2; |
4417 | } | |
4418 | ||
8400e75e | 4419 | if (!warned && !in_system_header_at (input_location) && declspecs->thread_p) |
9a26d6ee | 4420 | { |
582d9b50 JM |
4421 | warning (0, "useless %qs in empty declaration", |
4422 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
4423 | warned = 2; |
4424 | } | |
4425 | ||
8400e75e DM |
4426 | if (!warned |
4427 | && !in_system_header_at (input_location) | |
4428 | && (declspecs->const_p | |
4429 | || declspecs->volatile_p | |
4430 | || declspecs->atomic_p | |
4431 | || declspecs->restrict_p | |
4432 | || declspecs->address_space)) | |
3b53cddc | 4433 | { |
d4ee4d25 | 4434 | warning (0, "useless type qualifier in empty declaration"); |
3b53cddc JM |
4435 | warned = 2; |
4436 | } | |
4437 | ||
8400e75e DM |
4438 | if (!warned && !in_system_header_at (input_location) |
4439 | && declspecs->alignas_p) | |
d19fa6b5 JM |
4440 | { |
4441 | warning (0, "useless %<_Alignas%> in empty declaration"); | |
4442 | warned = 2; | |
4443 | } | |
4444 | ||
773edaef | 4445 | if (warned != 1) |
51e29401 | 4446 | { |
deb176fa | 4447 | if (!found_tag) |
509c9d60 | 4448 | pedwarn (input_location, 0, "empty declaration"); |
51e29401 RS |
4449 | } |
4450 | } | |
4451 | \f | |
3b53cddc JM |
4452 | |
4453 | /* Return the qualifiers from SPECS as a bitwise OR of TYPE_QUAL_* | |
4454 | bits. SPECS represents declaration specifiers that the grammar | |
4455 | only permits to contain type qualifiers and attributes. */ | |
4456 | ||
4457 | int | |
4458 | quals_from_declspecs (const struct c_declspecs *specs) | |
4459 | { | |
4460 | int quals = ((specs->const_p ? TYPE_QUAL_CONST : 0) | |
4461 | | (specs->volatile_p ? TYPE_QUAL_VOLATILE : 0) | |
36c5e70a | 4462 | | (specs->restrict_p ? TYPE_QUAL_RESTRICT : 0) |
267bac10 | 4463 | | (specs->atomic_p ? TYPE_QUAL_ATOMIC : 0) |
36c5e70a | 4464 | | (ENCODE_QUAL_ADDR_SPACE (specs->address_space))); |
3b53cddc JM |
4465 | gcc_assert (!specs->type |
4466 | && !specs->decl_attr | |
98c3a782 | 4467 | && specs->typespec_word == cts_none |
3b53cddc JM |
4468 | && specs->storage_class == csc_none |
4469 | && !specs->typedef_p | |
98c3a782 | 4470 | && !specs->explicit_signed_p |
3b53cddc | 4471 | && !specs->deprecated_p |
98c3a782 | 4472 | && !specs->long_p |
3b53cddc | 4473 | && !specs->long_long_p |
98c3a782 JM |
4474 | && !specs->short_p |
4475 | && !specs->signed_p | |
4476 | && !specs->unsigned_p | |
4477 | && !specs->complex_p | |
3b53cddc | 4478 | && !specs->inline_p |
bbceee64 | 4479 | && !specs->noreturn_p |
3b53cddc JM |
4480 | && !specs->thread_p); |
4481 | return quals; | |
4482 | } | |
4483 | ||
c2255bc4 AH |
4484 | /* Construct an array declarator. LOC is the location of the |
4485 | beginning of the array (usually the opening brace). EXPR is the | |
4486 | expression inside [], or NULL_TREE. QUALS are the type qualifiers | |
4487 | inside the [] (to be applied to the pointer to which a parameter | |
4488 | array is converted). STATIC_P is true if "static" is inside the | |
4489 | [], false otherwise. VLA_UNSPEC_P is true if the array is [*], a | |
4490 | VLA of unspecified length which is nevertheless a complete type, | |
4491 | false otherwise. The field for the contained declarator is left to | |
4492 | be filled in by set_array_declarator_inner. */ | |
0e03329a | 4493 | |
f8893e47 | 4494 | struct c_declarator * |
c2255bc4 AH |
4495 | build_array_declarator (location_t loc, |
4496 | tree expr, struct c_declspecs *quals, bool static_p, | |
60919bce | 4497 | bool vla_unspec_p) |
0e03329a | 4498 | { |
f8893e47 JM |
4499 | struct c_declarator *declarator = XOBNEW (&parser_obstack, |
4500 | struct c_declarator); | |
c2255bc4 | 4501 | declarator->id_loc = loc; |
f8893e47 JM |
4502 | declarator->kind = cdk_array; |
4503 | declarator->declarator = 0; | |
4504 | declarator->u.array.dimen = expr; | |
3b53cddc JM |
4505 | if (quals) |
4506 | { | |
4507 | declarator->u.array.attrs = quals->attrs; | |
4508 | declarator->u.array.quals = quals_from_declspecs (quals); | |
4509 | } | |
4510 | else | |
4511 | { | |
4512 | declarator->u.array.attrs = NULL_TREE; | |
4513 | declarator->u.array.quals = 0; | |
4514 | } | |
f8893e47 JM |
4515 | declarator->u.array.static_p = static_p; |
4516 | declarator->u.array.vla_unspec_p = vla_unspec_p; | |
f3bede71 MP |
4517 | if (static_p || quals != NULL) |
4518 | pedwarn_c90 (loc, OPT_Wpedantic, | |
509c9d60 | 4519 | "ISO C90 does not support %<static%> or type " |
bda67431 | 4520 | "qualifiers in parameter array declarators"); |
f3bede71 MP |
4521 | if (vla_unspec_p) |
4522 | pedwarn_c90 (loc, OPT_Wpedantic, | |
509c9d60 | 4523 | "ISO C90 does not support %<[*]%> array declarators"); |
0e03329a | 4524 | if (vla_unspec_p) |
52ffd86e MS |
4525 | { |
4526 | if (!current_scope->parm_flag) | |
4527 | { | |
4528 | /* C99 6.7.5.2p4 */ | |
c2255bc4 AH |
4529 | error_at (loc, "%<[*]%> not allowed in other than " |
4530 | "function prototype scope"); | |
52ffd86e MS |
4531 | declarator->u.array.vla_unspec_p = false; |
4532 | return NULL; | |
4533 | } | |
4534 | current_scope->had_vla_unspec = true; | |
4535 | } | |
f8893e47 | 4536 | return declarator; |
0e03329a JM |
4537 | } |
4538 | ||
f8893e47 JM |
4539 | /* Set the contained declarator of an array declarator. DECL is the |
4540 | declarator, as constructed by build_array_declarator; INNER is what | |
6ac0194d | 4541 | appears on the left of the []. */ |
0e03329a | 4542 | |
f8893e47 JM |
4543 | struct c_declarator * |
4544 | set_array_declarator_inner (struct c_declarator *decl, | |
6ac0194d | 4545 | struct c_declarator *inner) |
0e03329a | 4546 | { |
f8893e47 | 4547 | decl->declarator = inner; |
0e03329a JM |
4548 | return decl; |
4549 | } | |
1f0f7ceb RS |
4550 | |
4551 | /* INIT is a constructor that forms DECL's initializer. If the final | |
4552 | element initializes a flexible array field, add the size of that | |
4553 | initializer to DECL's size. */ | |
4554 | ||
4555 | static void | |
4556 | add_flexible_array_elts_to_size (tree decl, tree init) | |
4557 | { | |
1f0f7ceb RS |
4558 | tree elt, type; |
4559 | ||
9771b263 | 4560 | if (vec_safe_is_empty (CONSTRUCTOR_ELTS (init))) |
1f0f7ceb RS |
4561 | return; |
4562 | ||
9771b263 | 4563 | elt = CONSTRUCTOR_ELTS (init)->last ().value; |
1f0f7ceb RS |
4564 | type = TREE_TYPE (elt); |
4565 | if (TREE_CODE (type) == ARRAY_TYPE | |
4566 | && TYPE_SIZE (type) == NULL_TREE | |
4567 | && TYPE_DOMAIN (type) != NULL_TREE | |
4568 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) == NULL_TREE) | |
4569 | { | |
4570 | complete_array_type (&type, elt, false); | |
4571 | DECL_SIZE (decl) | |
4572 | = size_binop (PLUS_EXPR, DECL_SIZE (decl), TYPE_SIZE (type)); | |
4573 | DECL_SIZE_UNIT (decl) | |
4574 | = size_binop (PLUS_EXPR, DECL_SIZE_UNIT (decl), TYPE_SIZE_UNIT (type)); | |
4575 | } | |
4576 | } | |
0e03329a | 4577 | \f |
928c19bb JM |
4578 | /* Decode a "typename", such as "int **", returning a ..._TYPE node. |
4579 | Set *EXPR, if EXPR not NULL, to any expression to be evaluated | |
4580 | before the type name, and set *EXPR_CONST_OPERANDS, if | |
4581 | EXPR_CONST_OPERANDS not NULL, to indicate whether the type name may | |
4582 | appear in a constant expression. */ | |
51e29401 RS |
4583 | |
4584 | tree | |
928c19bb JM |
4585 | groktypename (struct c_type_name *type_name, tree *expr, |
4586 | bool *expr_const_operands) | |
51e29401 | 4587 | { |
f8893e47 | 4588 | tree type; |
deb176fa | 4589 | tree attrs = type_name->specs->attrs; |
d3b4cd6f | 4590 | |
deb176fa | 4591 | type_name->specs->attrs = NULL_TREE; |
d3b4cd6f | 4592 | |
deb176fa | 4593 | type = grokdeclarator (type_name->declarator, type_name->specs, TYPENAME, |
928c19bb JM |
4594 | false, NULL, &attrs, expr, expr_const_operands, |
4595 | DEPRECATED_NORMAL); | |
d3b4cd6f AH |
4596 | |
4597 | /* Apply attributes. */ | |
f8893e47 | 4598 | decl_attributes (&type, attrs, 0); |
d3b4cd6f | 4599 | |
f8893e47 | 4600 | return type; |
51e29401 RS |
4601 | } |
4602 | ||
acf0174b JJ |
4603 | /* Wrapper for decl_attributes that adds some implicit attributes |
4604 | to VAR_DECLs or FUNCTION_DECLs. */ | |
4605 | ||
4606 | static tree | |
4607 | c_decl_attributes (tree *node, tree attributes, int flags) | |
4608 | { | |
4609 | /* Add implicit "omp declare target" attribute if requested. */ | |
4610 | if (current_omp_declare_target_attribute | |
0ae9bd27 | 4611 | && ((VAR_P (*node) && is_global_var (*node)) |
acf0174b JJ |
4612 | || TREE_CODE (*node) == FUNCTION_DECL)) |
4613 | { | |
0ae9bd27 | 4614 | if (VAR_P (*node) |
e01d41e5 | 4615 | && !lang_hooks.types.omp_mappable_type (TREE_TYPE (*node))) |
acf0174b JJ |
4616 | error ("%q+D in declare target directive does not have mappable type", |
4617 | *node); | |
4618 | else | |
4619 | attributes = tree_cons (get_identifier ("omp declare target"), | |
4620 | NULL_TREE, attributes); | |
4621 | } | |
4622 | return decl_attributes (node, attributes, flags); | |
4623 | } | |
4624 | ||
4625 | ||
51e29401 RS |
4626 | /* Decode a declarator in an ordinary declaration or data definition. |
4627 | This is called as soon as the type information and variable name | |
4628 | have been parsed, before parsing the initializer if any. | |
4629 | Here we create the ..._DECL node, fill in its type, | |
4630 | and put it on the list of decls for the current context. | |
4631 | The ..._DECL node is returned as the value. | |
4632 | ||
4633 | Exception: for arrays where the length is not specified, | |
4634 | the type is left null, to be filled in by `finish_decl'. | |
4635 | ||
4636 | Function definitions do not come here; they go to start_function | |
4637 | instead. However, external and forward declarations of functions | |
4638 | do go through here. Structure field declarations are done by | |
4639 | grokfield and not through here. */ | |
4640 | ||
51e29401 | 4641 | tree |
deb176fa | 4642 | start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs, |
f8893e47 | 4643 | bool initialized, tree attributes) |
51e29401 | 4644 | { |
e23bd218 | 4645 | tree decl; |
b3694847 | 4646 | tree tem; |
928c19bb | 4647 | tree expr = NULL_TREE; |
0da300cd | 4648 | enum deprecated_states deprecated_state = DEPRECATED_NORMAL; |
35b1a6fa | 4649 | |
e23bd218 IR |
4650 | /* An object declared as __attribute__((deprecated)) suppresses |
4651 | warnings of uses of other deprecated items. */ | |
4652 | if (lookup_attribute ("deprecated", attributes)) | |
4653 | deprecated_state = DEPRECATED_SUPPRESS; | |
4654 | ||
4655 | decl = grokdeclarator (declarator, declspecs, | |
928c19bb | 4656 | NORMAL, initialized, NULL, &attributes, &expr, NULL, |
0da300cd | 4657 | deprecated_state); |
e5165b60 MP |
4658 | if (!decl || decl == error_mark_node) |
4659 | return NULL_TREE; | |
35b1a6fa | 4660 | |
928c19bb | 4661 | if (expr) |
0e0d82a7 | 4662 | add_stmt (fold_convert (void_type_node, expr)); |
928c19bb | 4663 | |
4003301d | 4664 | if (TREE_CODE (decl) != FUNCTION_DECL && MAIN_NAME_P (DECL_NAME (decl))) |
dee15844 | 4665 | warning (OPT_Wmain, "%q+D is usually a function", decl); |
b8705e61 | 4666 | |
51e29401 RS |
4667 | if (initialized) |
4668 | /* Is it valid for this decl to have an initializer at all? | |
4669 | If not, set INITIALIZED to zero, which will indirectly | |
f75fbaf7 | 4670 | tell 'finish_decl' to ignore the initializer once it is parsed. */ |
51e29401 RS |
4671 | switch (TREE_CODE (decl)) |
4672 | { | |
4673 | case TYPE_DECL: | |
bda67431 | 4674 | error ("typedef %qD is initialized (use __typeof__ instead)", decl); |
e3455240 | 4675 | initialized = false; |
51e29401 RS |
4676 | break; |
4677 | ||
4678 | case FUNCTION_DECL: | |
bda67431 | 4679 | error ("function %qD is initialized like a variable", decl); |
e3455240 | 4680 | initialized = false; |
51e29401 RS |
4681 | break; |
4682 | ||
4683 | case PARM_DECL: | |
4684 | /* DECL_INITIAL in a PARM_DECL is really DECL_ARG_TYPE. */ | |
bda67431 | 4685 | error ("parameter %qD is initialized", decl); |
e3455240 | 4686 | initialized = false; |
51e29401 RS |
4687 | break; |
4688 | ||
4689 | default: | |
f75fbaf7 ZW |
4690 | /* Don't allow initializations for incomplete types except for |
4691 | arrays which might be completed by the initialization. */ | |
f4fce7ed | 4692 | |
f75fbaf7 ZW |
4693 | /* This can happen if the array size is an undefined macro. |
4694 | We already gave a warning, so we don't need another one. */ | |
f4fce7ed | 4695 | if (TREE_TYPE (decl) == error_mark_node) |
e3455240 | 4696 | initialized = false; |
f4fce7ed | 4697 | else if (COMPLETE_TYPE_P (TREE_TYPE (decl))) |
51e29401 RS |
4698 | { |
4699 | /* A complete type is ok if size is fixed. */ | |
4700 | ||
4701 | if (TREE_CODE (TYPE_SIZE (TREE_TYPE (decl))) != INTEGER_CST | |
4702 | || C_DECL_VARIABLE_SIZE (decl)) | |
4703 | { | |
4704 | error ("variable-sized object may not be initialized"); | |
e3455240 | 4705 | initialized = false; |
51e29401 RS |
4706 | } |
4707 | } | |
4708 | else if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE) | |
4709 | { | |
bda67431 | 4710 | error ("variable %qD has initializer but incomplete type", decl); |
e3455240 | 4711 | initialized = false; |
51e29401 | 4712 | } |
ef787822 JM |
4713 | else if (C_DECL_VARIABLE_SIZE (decl)) |
4714 | { | |
4715 | /* Although C99 is unclear about whether incomplete arrays | |
4716 | of VLAs themselves count as VLAs, it does not make | |
4717 | sense to permit them to be initialized given that | |
4718 | ordinary VLAs may not be initialized. */ | |
4719 | error ("variable-sized object may not be initialized"); | |
e3455240 | 4720 | initialized = false; |
ef787822 | 4721 | } |
51e29401 RS |
4722 | } |
4723 | ||
4724 | if (initialized) | |
4725 | { | |
f75fbaf7 | 4726 | if (current_scope == file_scope) |
51e29401 RS |
4727 | TREE_STATIC (decl) = 1; |
4728 | ||
f75fbaf7 | 4729 | /* Tell 'pushdecl' this is an initialized decl |
51e29401 | 4730 | even though we don't yet have the initializer expression. |
f75fbaf7 | 4731 | Also tell 'finish_decl' it may store the real initializer. */ |
51e29401 RS |
4732 | DECL_INITIAL (decl) = error_mark_node; |
4733 | } | |
4734 | ||
4735 | /* If this is a function declaration, write a record describing it to the | |
4736 | prototypes file (if requested). */ | |
4737 | ||
4738 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
f4da8dce | 4739 | gen_aux_info_record (decl, 0, 0, prototype_p (TREE_TYPE (decl))); |
51e29401 | 4740 | |
2786cbad JM |
4741 | /* ANSI specifies that a tentative definition which is not merged with |
4742 | a non-tentative definition behaves exactly like a definition with an | |
4743 | initializer equal to zero. (Section 3.7.2) | |
3d78f2e9 RH |
4744 | |
4745 | -fno-common gives strict ANSI behavior, though this tends to break | |
4746 | a large body of code that grew up without this rule. | |
4747 | ||
4748 | Thread-local variables are never common, since there's no entrenched | |
4749 | body of code to break, and it allows more efficient variable references | |
95bd1dd7 | 4750 | in the presence of dynamic linking. */ |
3d78f2e9 | 4751 | |
0ae9bd27 | 4752 | if (VAR_P (decl) |
3d78f2e9 RH |
4753 | && !initialized |
4754 | && TREE_PUBLIC (decl) | |
c2f7fa15 | 4755 | && !DECL_THREAD_LOCAL_P (decl) |
3d78f2e9 | 4756 | && !flag_no_common) |
2786cbad | 4757 | DECL_COMMON (decl) = 1; |
8615176a | 4758 | |
daa6d5ff | 4759 | /* Set attributes here so if duplicate decl, will have proper attributes. */ |
acf0174b | 4760 | c_decl_attributes (&decl, attributes, 0); |
daa6d5ff | 4761 | |
4eb7fd83 JJ |
4762 | /* Handle gnu_inline attribute. */ |
4763 | if (declspecs->inline_p | |
da1c7394 | 4764 | && !flag_gnu89_inline |
4eb7fd83 | 4765 | && TREE_CODE (decl) == FUNCTION_DECL |
6cf59865 JJ |
4766 | && (lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (decl)) |
4767 | || current_function_decl)) | |
4eb7fd83 JJ |
4768 | { |
4769 | if (declspecs->storage_class == csc_auto && current_scope != file_scope) | |
4770 | ; | |
4771 | else if (declspecs->storage_class != csc_static) | |
4772 | DECL_EXTERNAL (decl) = !DECL_EXTERNAL (decl); | |
4773 | } | |
4eb7fd83 | 4774 | |
61f71b34 DD |
4775 | if (TREE_CODE (decl) == FUNCTION_DECL |
4776 | && targetm.calls.promote_prototypes (TREE_TYPE (decl))) | |
4777 | { | |
f8893e47 | 4778 | struct c_declarator *ce = declarator; |
61f71b34 | 4779 | |
f8893e47 JM |
4780 | if (ce->kind == cdk_pointer) |
4781 | ce = declarator->declarator; | |
4782 | if (ce->kind == cdk_function) | |
61f71b34 | 4783 | { |
f8893e47 | 4784 | tree args = ce->u.arg_info->parms; |
910ad8de | 4785 | for (; args; args = DECL_CHAIN (args)) |
61f71b34 DD |
4786 | { |
4787 | tree type = TREE_TYPE (args); | |
1f4f60fc | 4788 | if (type && INTEGRAL_TYPE_P (type) |
61f71b34 | 4789 | && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) |
267bac10 | 4790 | DECL_ARG_TYPE (args) = c_type_promotes_to (type); |
61f71b34 DD |
4791 | } |
4792 | } | |
4793 | } | |
4794 | ||
9162542e AO |
4795 | if (TREE_CODE (decl) == FUNCTION_DECL |
4796 | && DECL_DECLARED_INLINE_P (decl) | |
4797 | && DECL_UNINLINABLE (decl) | |
4798 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl))) | |
dee15844 JM |
4799 | warning (OPT_Wattributes, "inline function %q+D given attribute noinline", |
4800 | decl); | |
9162542e | 4801 | |
71113fcd GK |
4802 | /* C99 6.7.4p3: An inline definition of a function with external |
4803 | linkage shall not contain a definition of a modifiable object | |
4804 | with static storage duration... */ | |
0ae9bd27 | 4805 | if (VAR_P (decl) |
71113fcd GK |
4806 | && current_scope != file_scope |
4807 | && TREE_STATIC (decl) | |
1033ffa8 | 4808 | && !TREE_READONLY (decl) |
71113fcd GK |
4809 | && DECL_DECLARED_INLINE_P (current_function_decl) |
4810 | && DECL_EXTERNAL (current_function_decl)) | |
991d6621 JM |
4811 | record_inline_static (input_location, current_function_decl, |
4812 | decl, csi_modifiable); | |
71113fcd | 4813 | |
21b634ae MP |
4814 | if (c_dialect_objc () |
4815 | && VAR_OR_FUNCTION_DECL_P (decl)) | |
a6341d57 NP |
4816 | objc_check_global_decl (decl); |
4817 | ||
f8521984 | 4818 | /* Add this decl to the current scope. |
51e29401 RS |
4819 | TEM may equal DECL or it may be a previous decl of the same name. */ |
4820 | tem = pushdecl (decl); | |
4821 | ||
c1bbfd3c DJ |
4822 | if (initialized && DECL_EXTERNAL (tem)) |
4823 | { | |
4824 | DECL_EXTERNAL (tem) = 0; | |
4825 | TREE_STATIC (tem) = 1; | |
4826 | } | |
bbbcb2e1 | 4827 | |
51e29401 RS |
4828 | return tem; |
4829 | } | |
4830 | ||
51f4ec66 SZ |
4831 | /* Subroutine of finish_decl. TYPE is the type of an uninitialized object |
4832 | DECL or the non-array element type if DECL is an uninitialized array. | |
4833 | If that type has a const member, diagnose this. */ | |
4834 | ||
4835 | static void | |
4836 | diagnose_uninitialized_cst_member (tree decl, tree type) | |
4837 | { | |
4838 | tree field; | |
4839 | for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) | |
4840 | { | |
4841 | tree field_type; | |
4842 | if (TREE_CODE (field) != FIELD_DECL) | |
4843 | continue; | |
4844 | field_type = strip_array_types (TREE_TYPE (field)); | |
4845 | ||
4846 | if (TYPE_QUALS (field_type) & TYPE_QUAL_CONST) | |
4847 | { | |
4848 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
4849 | "uninitialized const member in %qT is invalid in C++", | |
4850 | strip_array_types (TREE_TYPE (decl))); | |
4851 | inform (DECL_SOURCE_LOCATION (field), "%qD should be initialized", field); | |
4852 | } | |
4853 | ||
3e636daf | 4854 | if (RECORD_OR_UNION_TYPE_P (field_type)) |
51f4ec66 SZ |
4855 | diagnose_uninitialized_cst_member (decl, field_type); |
4856 | } | |
4857 | } | |
4858 | ||
51e29401 RS |
4859 | /* Finish processing of a declaration; |
4860 | install its initial value. | |
bbbbb16a | 4861 | If ORIGTYPE is not NULL_TREE, it is the original type of INIT. |
51e29401 | 4862 | If the length of an array type is not known before, |
c2255bc4 AH |
4863 | it must be determined now, from the initial value, or it is an error. |
4864 | ||
4865 | INIT_LOC is the location of the initial value. */ | |
51e29401 RS |
4866 | |
4867 | void | |
c2255bc4 | 4868 | finish_decl (tree decl, location_t init_loc, tree init, |
21b634ae | 4869 | tree origtype, tree asmspec_tree) |
51e29401 | 4870 | { |
aa24028d | 4871 | tree type; |
3fa8871b | 4872 | bool was_incomplete = (DECL_SIZE (decl) == NULL_TREE); |
520a57c8 | 4873 | const char *asmspec = 0; |
51e29401 | 4874 | |
6d2f8887 | 4875 | /* If a name was specified, get the string. */ |
21b634ae | 4876 | if (VAR_OR_FUNCTION_DECL_P (decl) |
1ae57298 | 4877 | && DECL_FILE_SCOPE_P (decl)) |
41c64394 | 4878 | asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree); |
51e29401 | 4879 | if (asmspec_tree) |
72f5a12b | 4880 | asmspec = TREE_STRING_POINTER (asmspec_tree); |
51e29401 | 4881 | |
0ae9bd27 | 4882 | if (VAR_P (decl) |
b646ba3f DS |
4883 | && TREE_STATIC (decl) |
4884 | && global_bindings_p ()) | |
4885 | /* So decl is a global variable. Record the types it uses | |
4886 | so that we can decide later to emit debug info for them. */ | |
4887 | record_types_used_by_current_var_decl (decl); | |
4888 | ||
51e29401 | 4889 | /* If `start_decl' didn't like having an initialization, ignore it now. */ |
3fa8871b MP |
4890 | if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE) |
4891 | init = NULL_TREE; | |
35b1a6fa | 4892 | |
51e29401 RS |
4893 | /* Don't crash if parm is initialized. */ |
4894 | if (TREE_CODE (decl) == PARM_DECL) | |
3fa8871b | 4895 | init = NULL_TREE; |
51e29401 RS |
4896 | |
4897 | if (init) | |
c2255bc4 | 4898 | store_init_value (init_loc, decl, init, origtype); |
51e29401 | 4899 | |
21b634ae | 4900 | if (c_dialect_objc () && (VAR_OR_FUNCTION_DECL_P (decl) |
0e6df31e | 4901 | || TREE_CODE (decl) == FIELD_DECL)) |
264fa2db ZL |
4902 | objc_check_decl (decl); |
4903 | ||
aa24028d AP |
4904 | type = TREE_TYPE (decl); |
4905 | ||
6614fd40 | 4906 | /* Deduce size of array from initialization, if not already known. */ |
51e29401 | 4907 | if (TREE_CODE (type) == ARRAY_TYPE |
3fa8871b | 4908 | && TYPE_DOMAIN (type) == NULL_TREE |
51e29401 RS |
4909 | && TREE_CODE (decl) != TYPE_DECL) |
4910 | { | |
aab038d5 | 4911 | bool do_default |
51e29401 RS |
4912 | = (TREE_STATIC (decl) |
4913 | /* Even if pedantic, an external linkage array | |
4914 | may have incomplete type at first. */ | |
4915 | ? pedantic && !TREE_PUBLIC (decl) | |
1394aabd | 4916 | : !DECL_EXTERNAL (decl)); |
51e29401 | 4917 | int failure |
aab038d5 RH |
4918 | = complete_array_type (&TREE_TYPE (decl), DECL_INITIAL (decl), |
4919 | do_default); | |
51e29401 RS |
4920 | |
4921 | /* Get the completed type made by complete_array_type. */ | |
4922 | type = TREE_TYPE (decl); | |
4923 | ||
317a9ac3 | 4924 | switch (failure) |
51e29401 | 4925 | { |
317a9ac3 | 4926 | case 1: |
dee15844 | 4927 | error ("initializer fails to determine size of %q+D", decl); |
317a9ac3 RH |
4928 | break; |
4929 | ||
4930 | case 2: | |
51e29401 | 4931 | if (do_default) |
dee15844 | 4932 | error ("array size missing in %q+D", decl); |
b4892310 RS |
4933 | /* If a `static' var's size isn't known, |
4934 | make it extern as well as static, so it does not get | |
4935 | allocated. | |
4936 | If it is not `static', then do not mark extern; | |
4937 | finish_incomplete_decl will give it a default size | |
4938 | and it will get allocated. */ | |
3f75a254 | 4939 | else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl)) |
1394aabd | 4940 | DECL_EXTERNAL (decl) = 1; |
317a9ac3 RH |
4941 | break; |
4942 | ||
4943 | case 3: | |
dee15844 | 4944 | error ("zero or negative size array %q+D", decl); |
317a9ac3 RH |
4945 | break; |
4946 | ||
4947 | case 0: | |
4948 | /* For global variables, update the copy of the type that | |
4949 | exists in the binding. */ | |
4950 | if (TREE_PUBLIC (decl)) | |
4951 | { | |
4952 | struct c_binding *b_ext = I_SYMBOL_BINDING (DECL_NAME (decl)); | |
4953 | while (b_ext && !B_IN_EXTERNAL_SCOPE (b_ext)) | |
4954 | b_ext = b_ext->shadowed; | |
0b05329b | 4955 | if (b_ext && TREE_CODE (decl) == TREE_CODE (b_ext->decl)) |
317a9ac3 | 4956 | { |
2609a0ce | 4957 | if (b_ext->u.type && comptypes (b_ext->u.type, type)) |
e1b7793c | 4958 | b_ext->u.type = composite_type (b_ext->u.type, type); |
317a9ac3 | 4959 | else |
e1b7793c | 4960 | b_ext->u.type = type; |
317a9ac3 RH |
4961 | } |
4962 | } | |
4963 | break; | |
4964 | ||
4965 | default: | |
4966 | gcc_unreachable (); | |
51e29401 | 4967 | } |
51e29401 | 4968 | |
aab038d5 RH |
4969 | if (DECL_INITIAL (decl)) |
4970 | TREE_TYPE (DECL_INITIAL (decl)) = type; | |
4971 | ||
156030d3 | 4972 | relayout_decl (decl); |
51e29401 RS |
4973 | } |
4974 | ||
0ae9bd27 | 4975 | if (VAR_P (decl)) |
51e29401 | 4976 | { |
1f0f7ceb RS |
4977 | if (init && TREE_CODE (init) == CONSTRUCTOR) |
4978 | add_flexible_array_elts_to_size (decl, init); | |
4979 | ||
3fa8871b | 4980 | if (DECL_SIZE (decl) == NULL_TREE && TREE_TYPE (decl) != error_mark_node |
f4fce7ed | 4981 | && COMPLETE_TYPE_P (TREE_TYPE (decl))) |
d575f110 RS |
4982 | layout_decl (decl, 0); |
4983 | ||
3fa8871b | 4984 | if (DECL_SIZE (decl) == NULL_TREE |
f4fce7ed JW |
4985 | /* Don't give an error if we already gave one earlier. */ |
4986 | && TREE_TYPE (decl) != error_mark_node | |
a7f64d52 | 4987 | && (TREE_STATIC (decl) |
0e6df31e GK |
4988 | /* A static variable with an incomplete type |
4989 | is an error if it is initialized. | |
4990 | Also if it is not file scope. | |
4991 | Otherwise, let it through, but if it is not `extern' | |
4992 | then it may cause an error message later. */ | |
3fa8871b | 4993 | ? (DECL_INITIAL (decl) != NULL_TREE |
4b1e44be | 4994 | || !DECL_FILE_SCOPE_P (decl)) |
0e6df31e GK |
4995 | /* An automatic variable with an incomplete type |
4996 | is an error. */ | |
4997 | : !DECL_EXTERNAL (decl))) | |
4998 | { | |
dee15844 | 4999 | error ("storage size of %q+D isn%'t known", decl); |
0e6df31e GK |
5000 | TREE_TYPE (decl) = error_mark_node; |
5001 | } | |
51e29401 | 5002 | |
d25c7690 PK |
5003 | if ((RECORD_OR_UNION_TYPE_P (TREE_TYPE (decl)) |
5004 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
5005 | && DECL_SIZE (decl) == NULL_TREE | |
5006 | && TREE_STATIC (decl)) | |
5007 | incomplete_record_decls.safe_push (decl); | |
5008 | ||
3fa8871b | 5009 | if (is_global_var (decl) && DECL_SIZE (decl) != NULL_TREE) |
e681c5a1 RS |
5010 | { |
5011 | if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST) | |
5012 | constant_expression_warning (DECL_SIZE (decl)); | |
5013 | else | |
b97d8153 JJ |
5014 | { |
5015 | error ("storage size of %q+D isn%'t constant", decl); | |
5016 | TREE_TYPE (decl) = error_mark_node; | |
5017 | } | |
e681c5a1 | 5018 | } |
e9a25f70 | 5019 | |
6645c3fa | 5020 | if (TREE_USED (type)) |
ebfbbdc5 JJ |
5021 | { |
5022 | TREE_USED (decl) = 1; | |
5023 | DECL_READ_P (decl) = 1; | |
5024 | } | |
51e29401 RS |
5025 | } |
5026 | ||
9661b15f | 5027 | /* If this is a function and an assembler name is specified, reset DECL_RTL |
e79983f4 | 5028 | so we can give it its new name. Also, update builtin_decl if it |
9661b15f | 5029 | was a normal built-in. */ |
3c4afaa5 | 5030 | if (TREE_CODE (decl) == FUNCTION_DECL && asmspec) |
6645c3fa | 5031 | { |
9661b15f | 5032 | if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL) |
b482789c | 5033 | set_builtin_user_assembler_name (decl, asmspec); |
0e6df31e | 5034 | set_user_assembler_name (decl, asmspec); |
6645c3fa | 5035 | } |
3c4afaa5 | 5036 | |
d05cc98e | 5037 | /* If #pragma weak was used, mark the decl weak now. */ |
3693d46c | 5038 | maybe_apply_pragma_weak (decl); |
d05cc98e | 5039 | |
51e29401 RS |
5040 | /* Output the assembler code and/or RTL code for variables and functions, |
5041 | unless the type is an undefined structure or union. | |
5042 | If not, it will get done when the type is completed. */ | |
5043 | ||
21b634ae | 5044 | if (VAR_OR_FUNCTION_DECL_P (decl)) |
51e29401 | 5045 | { |
b9e75696 JM |
5046 | /* Determine the ELF visibility. */ |
5047 | if (TREE_PUBLIC (decl)) | |
5048 | c_determine_visibility (decl); | |
5049 | ||
0f7866e7 | 5050 | /* This is a no-op in c-lang.c or something real in objc-act.c. */ |
37fa72e9 | 5051 | if (c_dialect_objc ()) |
0f7866e7 | 5052 | objc_check_decl (decl); |
8f17b5c5 | 5053 | |
c22cacf3 | 5054 | if (asmspec) |
0e6df31e GK |
5055 | { |
5056 | /* If this is not a static variable, issue a warning. | |
5057 | It doesn't make any sense to give an ASMSPEC for an | |
5058 | ordinary, non-register local variable. Historically, | |
5059 | GCC has accepted -- but ignored -- the ASMSPEC in | |
5060 | this case. */ | |
3f75a254 | 5061 | if (!DECL_FILE_SCOPE_P (decl) |
0ae9bd27 | 5062 | && VAR_P (decl) |
0e6df31e GK |
5063 | && !C_DECL_REGISTER (decl) |
5064 | && !TREE_STATIC (decl)) | |
dee15844 JM |
5065 | warning (0, "ignoring asm-specifier for non-static local " |
5066 | "variable %q+D", decl); | |
0e6df31e GK |
5067 | else |
5068 | set_user_assembler_name (decl, asmspec); | |
5069 | } | |
c22cacf3 | 5070 | |
4b1e44be | 5071 | if (DECL_FILE_SCOPE_P (decl)) |
8cf8d8a2 JM |
5072 | { |
5073 | if (DECL_INITIAL (decl) == NULL_TREE | |
5074 | || DECL_INITIAL (decl) == error_mark_node) | |
5075 | /* Don't output anything | |
5076 | when a tentative file-scope definition is seen. | |
5077 | But at end of compilation, do output code for them. */ | |
5078 | DECL_DEFER_OUTPUT (decl) = 1; | |
10fa8dfb | 5079 | if (asmspec && VAR_P (decl) && C_DECL_REGISTER (decl)) |
6d6c9525 | 5080 | DECL_HARD_REGISTER (decl) = 1; |
0e6df31e | 5081 | rest_of_decl_compilation (decl, true, 0); |
8cf8d8a2 | 5082 | } |
8f17b5c5 MM |
5083 | else |
5084 | { | |
0e6df31e GK |
5085 | /* In conjunction with an ASMSPEC, the `register' |
5086 | keyword indicates that we should place the variable | |
5087 | in a particular register. */ | |
5088 | if (asmspec && C_DECL_REGISTER (decl)) | |
3645c4dc | 5089 | { |
0e6df31e GK |
5090 | DECL_HARD_REGISTER (decl) = 1; |
5091 | /* This cannot be done for a structure with volatile | |
5092 | fields, on which DECL_REGISTER will have been | |
5093 | reset. */ | |
5094 | if (!DECL_REGISTER (decl)) | |
5095 | error ("cannot put object with volatile field into register"); | |
3645c4dc | 5096 | } |
0adc3c19 | 5097 | |
c0a4369a | 5098 | if (TREE_CODE (decl) != FUNCTION_DECL) |
174283a3 RH |
5099 | { |
5100 | /* If we're building a variable sized type, and we might be | |
5101 | reachable other than via the top of the current binding | |
5102 | level, then create a new BIND_EXPR so that we deallocate | |
5103 | the object at the right time. */ | |
5104 | /* Note that DECL_SIZE can be null due to errors. */ | |
5105 | if (DECL_SIZE (decl) | |
5106 | && !TREE_CONSTANT (DECL_SIZE (decl)) | |
5107 | && STATEMENT_LIST_HAS_LABEL (cur_stmt_list)) | |
5108 | { | |
5109 | tree bind; | |
53fb4de3 | 5110 | bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, NULL); |
174283a3 RH |
5111 | TREE_SIDE_EFFECTS (bind) = 1; |
5112 | add_stmt (bind); | |
5113 | BIND_EXPR_BODY (bind) = push_stmt_list (); | |
5114 | } | |
c2255bc4 AH |
5115 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), |
5116 | DECL_EXPR, decl)); | |
174283a3 | 5117 | } |
8f17b5c5 | 5118 | } |
c22cacf3 | 5119 | |
4dd7201e | 5120 | |
4b1e44be | 5121 | if (!DECL_FILE_SCOPE_P (decl)) |
51e29401 RS |
5122 | { |
5123 | /* Recompute the RTL of a local array now | |
5124 | if it used to be an incomplete type. */ | |
62f9079a | 5125 | if (was_incomplete && !is_global_var (decl)) |
51e29401 RS |
5126 | { |
5127 | /* If we used it already as memory, it must stay in memory. */ | |
5128 | TREE_ADDRESSABLE (decl) = TREE_USED (decl); | |
5129 | /* If it's still incomplete now, no init will save it. */ | |
3fa8871b MP |
5130 | if (DECL_SIZE (decl) == NULL_TREE) |
5131 | DECL_INITIAL (decl) = NULL_TREE; | |
51e29401 | 5132 | } |
51e29401 RS |
5133 | } |
5134 | } | |
5135 | ||
5136 | if (TREE_CODE (decl) == TYPE_DECL) | |
1c9766da RK |
5137 | { |
5138 | if (!DECL_FILE_SCOPE_P (decl) | |
5377d5ba | 5139 | && variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)) |
c2255bc4 | 5140 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl)); |
1c9766da | 5141 | |
0e6df31e | 5142 | rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl), 0); |
1c9766da | 5143 | } |
51e29401 | 5144 | |
0bfa5f65 | 5145 | /* Install a cleanup (aka destructor) if one was given. */ |
0ae9bd27 | 5146 | if (VAR_P (decl) && !TREE_STATIC (decl)) |
0bfa5f65 RH |
5147 | { |
5148 | tree attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl)); | |
5149 | if (attr) | |
5150 | { | |
0bfa5f65 RH |
5151 | tree cleanup_id = TREE_VALUE (TREE_VALUE (attr)); |
5152 | tree cleanup_decl = lookup_name (cleanup_id); | |
5153 | tree cleanup; | |
9771b263 | 5154 | vec<tree, va_gc> *v; |
0bfa5f65 RH |
5155 | |
5156 | /* Build "cleanup(&decl)" for the destructor. */ | |
e51fbec3 | 5157 | cleanup = build_unary_op (input_location, ADDR_EXPR, decl, false); |
9771b263 DN |
5158 | vec_alloc (v, 1); |
5159 | v->quick_push (cleanup); | |
8edbfaa6 JJ |
5160 | cleanup = c_build_function_call_vec (DECL_SOURCE_LOCATION (decl), |
5161 | vNULL, cleanup_decl, v, NULL); | |
9771b263 | 5162 | vec_free (v); |
0bfa5f65 RH |
5163 | |
5164 | /* Don't warn about decl unused; the cleanup uses it. */ | |
5165 | TREE_USED (decl) = 1; | |
325c3691 | 5166 | TREE_USED (cleanup_decl) = 1; |
ebfbbdc5 | 5167 | DECL_READ_P (decl) = 1; |
0bfa5f65 | 5168 | |
325c3691 | 5169 | push_cleanup (decl, cleanup, false); |
0bfa5f65 RH |
5170 | } |
5171 | } | |
642324bb ILT |
5172 | |
5173 | if (warn_cxx_compat | |
0ae9bd27 | 5174 | && VAR_P (decl) |
642324bb ILT |
5175 | && !DECL_EXTERNAL (decl) |
5176 | && DECL_INITIAL (decl) == NULL_TREE) | |
51f4ec66 SZ |
5177 | { |
5178 | type = strip_array_types (type); | |
5179 | if (TREE_READONLY (decl)) | |
5180 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
5181 | "uninitialized const %qD is invalid in C++", decl); | |
3e636daf | 5182 | else if (RECORD_OR_UNION_TYPE_P (type) |
51f4ec66 SZ |
5183 | && C_TYPE_FIELDS_READONLY (type)) |
5184 | diagnose_uninitialized_cst_member (decl, type); | |
5185 | } | |
4309e92c RG |
5186 | |
5187 | invoke_plugin_callbacks (PLUGIN_FINISH_DECL, decl); | |
51e29401 RS |
5188 | } |
5189 | ||
a04a722b JM |
5190 | /* Given a parsed parameter declaration, decode it into a PARM_DECL. |
5191 | EXPR is NULL or a pointer to an expression that needs to be | |
5192 | evaluated for the side effects of array size expressions in the | |
5193 | parameters. */ | |
c34be55e ZL |
5194 | |
5195 | tree | |
a04a722b | 5196 | grokparm (const struct c_parm *parm, tree *expr) |
c34be55e | 5197 | { |
b9baeecd | 5198 | tree attrs = parm->attrs; |
f8893e47 | 5199 | tree decl = grokdeclarator (parm->declarator, parm->specs, PARM, false, |
a04a722b | 5200 | NULL, &attrs, expr, NULL, DEPRECATED_NORMAL); |
c34be55e | 5201 | |
b9baeecd | 5202 | decl_attributes (&decl, attrs, 0); |
c34be55e ZL |
5203 | |
5204 | return decl; | |
5205 | } | |
5206 | ||
55d54003 | 5207 | /* Given a parsed parameter declaration, decode it into a PARM_DECL |
a04a722b JM |
5208 | and push that on the current scope. EXPR is a pointer to an |
5209 | expression that needs to be evaluated for the side effects of array | |
5210 | size expressions in the parameters. */ | |
51e29401 RS |
5211 | |
5212 | void | |
a04a722b | 5213 | push_parm_decl (const struct c_parm *parm, tree *expr) |
51e29401 | 5214 | { |
b9baeecd | 5215 | tree attrs = parm->attrs; |
6cc902a1 | 5216 | tree decl; |
14077d68 | 5217 | |
0da300cd | 5218 | decl = grokdeclarator (parm->declarator, parm->specs, PARM, false, NULL, |
a04a722b | 5219 | &attrs, expr, NULL, DEPRECATED_NORMAL); |
8139a48e DM |
5220 | if (decl && DECL_P (decl)) |
5221 | DECL_SOURCE_LOCATION (decl) = parm->loc; | |
b9baeecd | 5222 | decl_attributes (&decl, attrs, 0); |
6a5ed5bf | 5223 | |
51e29401 RS |
5224 | decl = pushdecl (decl); |
5225 | ||
c2255bc4 | 5226 | finish_decl (decl, input_location, NULL_TREE, NULL_TREE, NULL_TREE); |
51e29401 RS |
5227 | } |
5228 | ||
f75fbaf7 | 5229 | /* Mark all the parameter declarations to date as forward decls. |
f91f41b2 | 5230 | Also diagnose use of this extension. */ |
51e29401 RS |
5231 | |
5232 | void | |
55d54003 | 5233 | mark_forward_parm_decls (void) |
51e29401 | 5234 | { |
f75fbaf7 | 5235 | struct c_binding *b; |
55d54003 ZW |
5236 | |
5237 | if (pedantic && !current_scope->warned_forward_parm_decls) | |
5238 | { | |
c1771a20 | 5239 | pedwarn (input_location, OPT_Wpedantic, |
509c9d60 | 5240 | "ISO C forbids forward parameter declarations"); |
55d54003 ZW |
5241 | current_scope->warned_forward_parm_decls = true; |
5242 | } | |
5243 | ||
f75fbaf7 ZW |
5244 | for (b = current_scope->bindings; b; b = b->prev) |
5245 | if (TREE_CODE (b->decl) == PARM_DECL) | |
5246 | TREE_ASM_WRITTEN (b->decl) = 1; | |
51e29401 RS |
5247 | } |
5248 | \f | |
db3acfa5 JM |
5249 | /* Build a COMPOUND_LITERAL_EXPR. TYPE is the type given in the compound |
5250 | literal, which may be an incomplete array type completed by the | |
c2255bc4 | 5251 | initializer; INIT is a CONSTRUCTOR at LOC that initializes the compound |
928c19bb JM |
5252 | literal. NON_CONST is true if the initializers contain something |
5253 | that cannot occur in a constant expression. */ | |
db3acfa5 JM |
5254 | |
5255 | tree | |
c2255bc4 | 5256 | build_compound_literal (location_t loc, tree type, tree init, bool non_const) |
db3acfa5 JM |
5257 | { |
5258 | /* We do not use start_decl here because we have a type, not a declarator; | |
5259 | and do not use finish_decl because the decl should be stored inside | |
350fae66 | 5260 | the COMPOUND_LITERAL_EXPR rather than added elsewhere as a DECL_EXPR. */ |
ef787822 | 5261 | tree decl; |
db3acfa5 | 5262 | tree complit; |
8d37a5c0 | 5263 | tree stmt; |
ef787822 | 5264 | |
3e23fb2e AP |
5265 | if (type == error_mark_node |
5266 | || init == error_mark_node) | |
ef787822 JM |
5267 | return error_mark_node; |
5268 | ||
c2255bc4 | 5269 | decl = build_decl (loc, VAR_DECL, NULL_TREE, type); |
db3acfa5 JM |
5270 | DECL_EXTERNAL (decl) = 0; |
5271 | TREE_PUBLIC (decl) = 0; | |
f75fbaf7 | 5272 | TREE_STATIC (decl) = (current_scope == file_scope); |
db3acfa5 JM |
5273 | DECL_CONTEXT (decl) = current_function_decl; |
5274 | TREE_USED (decl) = 1; | |
ebfbbdc5 | 5275 | DECL_READ_P (decl) = 1; |
142473df MP |
5276 | DECL_ARTIFICIAL (decl) = 1; |
5277 | DECL_IGNORED_P (decl) = 1; | |
db3acfa5 | 5278 | TREE_TYPE (decl) = type; |
2a389958 | 5279 | c_apply_type_quals_to_decl (TYPE_QUALS (strip_array_types (type)), decl); |
c2255bc4 | 5280 | store_init_value (loc, decl, init, NULL_TREE); |
db3acfa5 JM |
5281 | |
5282 | if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type)) | |
5283 | { | |
aab038d5 RH |
5284 | int failure = complete_array_type (&TREE_TYPE (decl), |
5285 | DECL_INITIAL (decl), true); | |
da0fc454 MP |
5286 | /* If complete_array_type returns 3, it means that the |
5287 | initial value of the compound literal is empty. Allow it. */ | |
5288 | gcc_assert (failure == 0 || failure == 3); | |
aab038d5 RH |
5289 | |
5290 | type = TREE_TYPE (decl); | |
5291 | TREE_TYPE (DECL_INITIAL (decl)) = type; | |
db3acfa5 JM |
5292 | } |
5293 | ||
db3acfa5 | 5294 | if (type == error_mark_node || !COMPLETE_TYPE_P (type)) |
cce50861 | 5295 | { |
4f2e1536 | 5296 | c_incomplete_type_error (loc, NULL_TREE, type); |
cce50861 JJ |
5297 | return error_mark_node; |
5298 | } | |
db3acfa5 | 5299 | |
c2255bc4 | 5300 | stmt = build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl); |
aab038d5 | 5301 | complit = build1 (COMPOUND_LITERAL_EXPR, type, stmt); |
db3acfa5 JM |
5302 | TREE_SIDE_EFFECTS (complit) = 1; |
5303 | ||
5304 | layout_decl (decl, 0); | |
5305 | ||
5306 | if (TREE_STATIC (decl)) | |
5307 | { | |
3b2db49f MM |
5308 | /* This decl needs a name for the assembler output. */ |
5309 | set_compound_literal_name (decl); | |
cf3c4f56 JJ |
5310 | DECL_DEFER_OUTPUT (decl) = 1; |
5311 | DECL_COMDAT (decl) = 1; | |
cf3c4f56 | 5312 | pushdecl (decl); |
0e6df31e | 5313 | rest_of_decl_compilation (decl, 1, 0); |
db3acfa5 JM |
5314 | } |
5315 | ||
928c19bb JM |
5316 | if (non_const) |
5317 | { | |
5318 | complit = build2 (C_MAYBE_CONST_EXPR, type, NULL, complit); | |
5319 | C_MAYBE_CONST_EXPR_NON_CONST (complit) = 1; | |
5320 | } | |
5321 | ||
db3acfa5 JM |
5322 | return complit; |
5323 | } | |
24b97832 ILT |
5324 | |
5325 | /* Check the type of a compound literal. Here we just check that it | |
5326 | is valid for C++. */ | |
5327 | ||
5328 | void | |
c2255bc4 | 5329 | check_compound_literal_type (location_t loc, struct c_type_name *type_name) |
24b97832 | 5330 | { |
9e5b2115 PB |
5331 | if (warn_cxx_compat |
5332 | && (type_name->specs->typespec_kind == ctsk_tagdef | |
5333 | || type_name->specs->typespec_kind == ctsk_tagfirstref)) | |
24b97832 ILT |
5334 | warning_at (loc, OPT_Wc___compat, |
5335 | "defining a type in a compound literal is invalid in C++"); | |
5336 | } | |
db3acfa5 | 5337 | \f |
2984fe64 JM |
5338 | /* Determine whether TYPE is a structure with a flexible array member, |
5339 | or a union containing such a structure (possibly recursively). */ | |
5340 | ||
5341 | static bool | |
35b1a6fa | 5342 | flexible_array_type_p (tree type) |
2984fe64 JM |
5343 | { |
5344 | tree x; | |
5345 | switch (TREE_CODE (type)) | |
5346 | { | |
5347 | case RECORD_TYPE: | |
5348 | x = TYPE_FIELDS (type); | |
5349 | if (x == NULL_TREE) | |
5350 | return false; | |
910ad8de NF |
5351 | while (DECL_CHAIN (x) != NULL_TREE) |
5352 | x = DECL_CHAIN (x); | |
2984fe64 JM |
5353 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE |
5354 | && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE | |
5355 | && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE | |
5356 | && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE) | |
5357 | return true; | |
5358 | return false; | |
5359 | case UNION_TYPE: | |
910ad8de | 5360 | for (x = TYPE_FIELDS (type); x != NULL_TREE; x = DECL_CHAIN (x)) |
2984fe64 JM |
5361 | { |
5362 | if (flexible_array_type_p (TREE_TYPE (x))) | |
5363 | return true; | |
5364 | } | |
5365 | return false; | |
5366 | default: | |
5367 | return false; | |
5368 | } | |
5369 | } | |
5370 | \f | |
2ff7cce4 JM |
5371 | /* Performs sanity checks on the TYPE and WIDTH of the bit-field NAME, |
5372 | replacing with appropriate values if they are invalid. */ | |
420a9d9b | 5373 | |
2ff7cce4 | 5374 | static void |
420a9d9b MP |
5375 | check_bitfield_type_and_width (location_t loc, tree *type, tree *width, |
5376 | tree orig_name) | |
2ff7cce4 JM |
5377 | { |
5378 | tree type_mv; | |
5379 | unsigned int max_width; | |
5380 | unsigned HOST_WIDE_INT w; | |
88388a52 JM |
5381 | const char *name = (orig_name |
5382 | ? identifier_to_locale (IDENTIFIER_POINTER (orig_name)) | |
5383 | : _("<anonymous>")); | |
2ff7cce4 | 5384 | |
2ff7cce4 JM |
5385 | /* Detect and ignore out of range field width and process valid |
5386 | field widths. */ | |
d3ae6c2a | 5387 | if (!INTEGRAL_TYPE_P (TREE_TYPE (*width))) |
2ff7cce4 | 5388 | { |
420a9d9b | 5389 | error_at (loc, "bit-field %qs width not an integer constant", name); |
2ff7cce4 JM |
5390 | *width = integer_one_node; |
5391 | } | |
5392 | else | |
5393 | { | |
d3ae6c2a JM |
5394 | if (TREE_CODE (*width) != INTEGER_CST) |
5395 | { | |
5396 | *width = c_fully_fold (*width, false, NULL); | |
5397 | if (TREE_CODE (*width) == INTEGER_CST) | |
420a9d9b | 5398 | pedwarn (loc, OPT_Wpedantic, |
d3ae6c2a JM |
5399 | "bit-field %qs width not an integer constant expression", |
5400 | name); | |
5401 | } | |
5402 | if (TREE_CODE (*width) != INTEGER_CST) | |
5403 | { | |
420a9d9b | 5404 | error_at (loc, "bit-field %qs width not an integer constant", name); |
d3ae6c2a JM |
5405 | *width = integer_one_node; |
5406 | } | |
2ff7cce4 JM |
5407 | constant_expression_warning (*width); |
5408 | if (tree_int_cst_sgn (*width) < 0) | |
5409 | { | |
420a9d9b | 5410 | error_at (loc, "negative width in bit-field %qs", name); |
2ff7cce4 JM |
5411 | *width = integer_one_node; |
5412 | } | |
5413 | else if (integer_zerop (*width) && orig_name) | |
5414 | { | |
420a9d9b | 5415 | error_at (loc, "zero width for bit-field %qs", name); |
2ff7cce4 JM |
5416 | *width = integer_one_node; |
5417 | } | |
5418 | } | |
5419 | ||
5420 | /* Detect invalid bit-field type. */ | |
5421 | if (TREE_CODE (*type) != INTEGER_TYPE | |
5422 | && TREE_CODE (*type) != BOOLEAN_TYPE | |
5423 | && TREE_CODE (*type) != ENUMERAL_TYPE) | |
5424 | { | |
420a9d9b | 5425 | error_at (loc, "bit-field %qs has invalid type", name); |
2ff7cce4 JM |
5426 | *type = unsigned_type_node; |
5427 | } | |
5428 | ||
00aa1fa2 L |
5429 | if (TYPE_WARN_IF_NOT_ALIGN (*type)) |
5430 | { | |
5431 | error_at (loc, "cannot declare bit-field %qs with %<warn_if_not_aligned%> type", | |
5432 | name); | |
5433 | *type = unsigned_type_node; | |
5434 | } | |
5435 | ||
2ff7cce4 | 5436 | type_mv = TYPE_MAIN_VARIANT (*type); |
8400e75e | 5437 | if (!in_system_header_at (input_location) |
2ff7cce4 JM |
5438 | && type_mv != integer_type_node |
5439 | && type_mv != unsigned_type_node | |
f3bede71 | 5440 | && type_mv != boolean_type_node) |
420a9d9b | 5441 | pedwarn_c90 (loc, OPT_Wpedantic, |
f3bede71 | 5442 | "type of bit-field %qs is a GCC extension", name); |
2ff7cce4 | 5443 | |
02668aba | 5444 | max_width = TYPE_PRECISION (*type); |
2ff7cce4 JM |
5445 | |
5446 | if (0 < compare_tree_int (*width, max_width)) | |
5447 | { | |
420a9d9b | 5448 | error_at (loc, "width of %qs exceeds its type", name); |
2ff7cce4 | 5449 | w = max_width; |
c62c040f | 5450 | *width = build_int_cst (integer_type_node, w); |
2ff7cce4 JM |
5451 | } |
5452 | else | |
ae7e9ddd | 5453 | w = tree_to_uhwi (*width); |
2ff7cce4 | 5454 | |
6de9cd9a DN |
5455 | if (TREE_CODE (*type) == ENUMERAL_TYPE) |
5456 | { | |
5457 | struct lang_type *lt = TYPE_LANG_SPECIFIC (*type); | |
118a3a8b | 5458 | if (!lt |
807e902e KZ |
5459 | || w < tree_int_cst_min_precision (lt->enum_min, TYPE_SIGN (*type)) |
5460 | || w < tree_int_cst_min_precision (lt->enum_max, TYPE_SIGN (*type))) | |
420a9d9b | 5461 | warning_at (loc, 0, "%qs is narrower than values of its type", name); |
6de9cd9a | 5462 | } |
2ff7cce4 | 5463 | } |
0b359b01 | 5464 | |
2ff7cce4 | 5465 | \f |
50d50fc7 SP |
5466 | |
5467 | /* Print warning about variable length array if necessary. */ | |
5468 | ||
5469 | static void | |
88388a52 | 5470 | warn_variable_length_array (tree name, tree size) |
50d50fc7 | 5471 | { |
177cce46 | 5472 | if (TREE_CONSTANT (size)) |
50d50fc7 | 5473 | { |
f3bede71 | 5474 | if (name) |
177cce46 | 5475 | pedwarn_c90 (input_location, OPT_Wvla, |
88388a52 | 5476 | "ISO C90 forbids array %qE whose size " |
f3bede71 | 5477 | "can%'t be evaluated", name); |
50d50fc7 | 5478 | else |
177cce46 | 5479 | pedwarn_c90 (input_location, OPT_Wvla, "ISO C90 forbids array " |
f3bede71 | 5480 | "whose size can%'t be evaluated"); |
50d50fc7 | 5481 | } |
f3bede71 | 5482 | else |
50d50fc7 | 5483 | { |
f3bede71 | 5484 | if (name) |
177cce46 | 5485 | pedwarn_c90 (input_location, OPT_Wvla, |
f3bede71 | 5486 | "ISO C90 forbids variable length array %qE", name); |
50d50fc7 | 5487 | else |
177cce46 | 5488 | pedwarn_c90 (input_location, OPT_Wvla, "ISO C90 forbids variable " |
f3bede71 | 5489 | "length array"); |
50d50fc7 SP |
5490 | } |
5491 | } | |
5492 | ||
35aff4fb MP |
5493 | /* Print warning about defaulting to int if necessary. */ |
5494 | ||
5495 | static void | |
5496 | warn_defaults_to (location_t location, int opt, const char *gmsgid, ...) | |
5497 | { | |
5498 | diagnostic_info diagnostic; | |
5499 | va_list ap; | |
ebedc9a3 | 5500 | rich_location richloc (line_table, location); |
35aff4fb MP |
5501 | |
5502 | va_start (ap, gmsgid); | |
8a645150 | 5503 | diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc, |
35aff4fb MP |
5504 | flag_isoc99 ? DK_PEDWARN : DK_WARNING); |
5505 | diagnostic.option_index = opt; | |
56d35585 | 5506 | diagnostic_report_diagnostic (global_dc, &diagnostic); |
35aff4fb MP |
5507 | va_end (ap); |
5508 | } | |
5509 | ||
8a14afd0 BS |
5510 | /* Returns the smallest location != UNKNOWN_LOCATION in LOCATIONS, |
5511 | considering only those c_declspec_words found in LIST, which | |
5512 | must be terminated by cdw_number_of_elements. */ | |
5513 | ||
5514 | static location_t | |
5515 | smallest_type_quals_location (const location_t *locations, | |
5516 | const c_declspec_word *list) | |
5517 | { | |
5518 | location_t loc = UNKNOWN_LOCATION; | |
5519 | while (*list != cdw_number_of_elements) | |
5520 | { | |
5521 | location_t newloc = locations[*list]; | |
5522 | if (loc == UNKNOWN_LOCATION | |
5523 | || (newloc != UNKNOWN_LOCATION && newloc < loc)) | |
5524 | loc = newloc; | |
5525 | list++; | |
5526 | } | |
5527 | ||
5528 | return loc; | |
5529 | } | |
5530 | ||
51e29401 RS |
5531 | /* Given declspecs and a declarator, |
5532 | determine the name and type of the object declared | |
5533 | and construct a ..._DECL node for it. | |
5534 | (In one case we can return a ..._TYPE node instead. | |
6574d78e | 5535 | For invalid input we sometimes return NULL_TREE.) |
51e29401 | 5536 | |
deb176fa | 5537 | DECLSPECS is a c_declspecs structure for the declaration specifiers. |
51e29401 RS |
5538 | |
5539 | DECL_CONTEXT says which syntactic context this declaration is in: | |
5540 | NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL. | |
5541 | FUNCDEF for a function definition. Like NORMAL but a few different | |
5542 | error messages in each case. Return value may be zero meaning | |
5543 | this definition is too screwy to try to parse. | |
5544 | PARM for a parameter declaration (either within a function prototype | |
5545 | or before a function body). Make a PARM_DECL, or return void_type_node. | |
5546 | TYPENAME if for a typename (in a cast or sizeof). | |
5547 | Don't make a DECL node; just return the ..._TYPE node. | |
5548 | FIELD for a struct or union field; make a FIELD_DECL. | |
60919bce | 5549 | INITIALIZED is true if the decl has an initializer. |
2ff7cce4 JM |
5550 | WIDTH is non-NULL for bit-fields, and is a pointer to an INTEGER_CST node |
5551 | representing the width of the bit-field. | |
b9baeecd RS |
5552 | DECL_ATTRS points to the list of attributes that should be added to this |
5553 | decl. Any nested attributes that belong on the decl itself will be | |
5554 | added to this list. | |
928c19bb JM |
5555 | If EXPR is not NULL, any expressions that need to be evaluated as |
5556 | part of evaluating variably modified types will be stored in *EXPR. | |
5557 | If EXPR_CONST_OPERANDS is not NULL, *EXPR_CONST_OPERANDS will be | |
5558 | set to indicate whether operands in *EXPR can be used in constant | |
5559 | expressions. | |
0da300cd TT |
5560 | DEPRECATED_STATE is a deprecated_states value indicating whether |
5561 | deprecation warnings should be suppressed. | |
51e29401 RS |
5562 | |
5563 | In the TYPENAME case, DECLARATOR is really an absolute declarator. | |
5564 | It may also be so in the PARM case, for a prototype where the | |
5565 | argument type is specified but not the name. | |
5566 | ||
5567 | This function is where the complicated C meanings of `static' | |
929f3671 | 5568 | and `extern' are interpreted. */ |
51e29401 RS |
5569 | |
5570 | static tree | |
deb176fa JM |
5571 | grokdeclarator (const struct c_declarator *declarator, |
5572 | struct c_declspecs *declspecs, | |
0da300cd | 5573 | enum decl_context decl_context, bool initialized, tree *width, |
928c19bb JM |
5574 | tree *decl_attrs, tree *expr, bool *expr_const_operands, |
5575 | enum deprecated_states deprecated_state) | |
51e29401 | 5576 | { |
deb176fa | 5577 | tree type = declspecs->type; |
9a26d6ee JM |
5578 | bool threadp = declspecs->thread_p; |
5579 | enum c_storage_class storage_class = declspecs->storage_class; | |
51e29401 | 5580 | int constp; |
3932261a | 5581 | int restrictp; |
51e29401 | 5582 | int volatilep; |
267bac10 | 5583 | int atomicp; |
3932261a | 5584 | int type_quals = TYPE_UNQUALIFIED; |
88388a52 | 5585 | tree name = NULL_TREE; |
52ffd86e | 5586 | bool funcdef_flag = false; |
f8893e47 | 5587 | bool funcdef_syntax = false; |
f9551830 | 5588 | bool size_varies = false; |
98c3a782 | 5589 | tree decl_attr = declspecs->decl_attr; |
3b53cddc JM |
5590 | int array_ptr_quals = TYPE_UNQUALIFIED; |
5591 | tree array_ptr_attrs = NULL_TREE; | |
e3455240 | 5592 | bool array_parm_static = false; |
52ffd86e | 5593 | bool array_parm_vla_unspec_p = false; |
91d231cb | 5594 | tree returned_attrs = NULL_TREE; |
2ff7cce4 | 5595 | bool bitfield = width != NULL; |
85b58ca5 | 5596 | tree element_type; |
e9e32ee6 JM |
5597 | tree orig_qual_type = NULL; |
5598 | size_t orig_qual_indirect = 0; | |
f8893e47 | 5599 | struct c_arg_info *arg_info = 0; |
36c5e70a | 5600 | addr_space_t as1, as2, address_space; |
c2255bc4 | 5601 | location_t loc = UNKNOWN_LOCATION; |
928c19bb JM |
5602 | tree expr_dummy; |
5603 | bool expr_const_operands_dummy; | |
411cdbd8 | 5604 | enum c_declarator_kind first_non_attr_kind; |
d19fa6b5 | 5605 | unsigned int alignas_align = 0; |
928c19bb | 5606 | |
29ce73cb PB |
5607 | if (TREE_CODE (type) == ERROR_MARK) |
5608 | return error_mark_node; | |
928c19bb | 5609 | if (expr == NULL) |
d17680f3 JJ |
5610 | { |
5611 | expr = &expr_dummy; | |
5612 | expr_dummy = NULL_TREE; | |
5613 | } | |
928c19bb JM |
5614 | if (expr_const_operands == NULL) |
5615 | expr_const_operands = &expr_const_operands_dummy; | |
5616 | ||
d17680f3 JJ |
5617 | if (declspecs->expr) |
5618 | { | |
5619 | if (*expr) | |
5620 | *expr = build2 (COMPOUND_EXPR, TREE_TYPE (declspecs->expr), *expr, | |
5621 | declspecs->expr); | |
5622 | else | |
5623 | *expr = declspecs->expr; | |
5624 | } | |
928c19bb | 5625 | *expr_const_operands = declspecs->expr_const_operands; |
51e29401 RS |
5626 | |
5627 | if (decl_context == FUNCDEF) | |
52ffd86e | 5628 | funcdef_flag = true, decl_context = NORMAL; |
51e29401 | 5629 | |
51e29401 | 5630 | /* Look inside a declarator for the name being declared |
88388a52 | 5631 | and get it as an IDENTIFIER_NODE, for an error message. */ |
51e29401 | 5632 | { |
f8893e47 | 5633 | const struct c_declarator *decl = declarator; |
51e29401 | 5634 | |
411cdbd8 | 5635 | first_non_attr_kind = cdk_attrs; |
51e29401 | 5636 | while (decl) |
f8893e47 | 5637 | switch (decl->kind) |
51e29401 | 5638 | { |
f8893e47 | 5639 | case cdk_array: |
c2255bc4 AH |
5640 | loc = decl->id_loc; |
5641 | /* FALL THRU. */ | |
5642 | ||
5643 | case cdk_function: | |
f8893e47 JM |
5644 | case cdk_pointer: |
5645 | funcdef_syntax = (decl->kind == cdk_function); | |
411cdbd8 RG |
5646 | if (first_non_attr_kind == cdk_attrs) |
5647 | first_non_attr_kind = decl->kind; | |
e9e32ee6 | 5648 | decl = decl->declarator; |
51e29401 RS |
5649 | break; |
5650 | ||
f8893e47 JM |
5651 | case cdk_attrs: |
5652 | decl = decl->declarator; | |
91d231cb JM |
5653 | break; |
5654 | ||
f8893e47 | 5655 | case cdk_id: |
c2255bc4 | 5656 | loc = decl->id_loc; |
f8893e47 | 5657 | if (decl->u.id) |
88388a52 | 5658 | name = decl->u.id; |
411cdbd8 RG |
5659 | if (first_non_attr_kind == cdk_attrs) |
5660 | first_non_attr_kind = decl->kind; | |
51e29401 RS |
5661 | decl = 0; |
5662 | break; | |
5663 | ||
5664 | default: | |
366de0ce | 5665 | gcc_unreachable (); |
51e29401 | 5666 | } |
3fa8871b | 5667 | if (name == NULL_TREE) |
88388a52 JM |
5668 | { |
5669 | gcc_assert (decl_context == PARM | |
5670 | || decl_context == TYPENAME | |
5671 | || (decl_context == FIELD | |
5672 | && declarator->kind == cdk_id)); | |
5673 | gcc_assert (!initialized); | |
5674 | } | |
51e29401 RS |
5675 | } |
5676 | ||
5677 | /* A function definition's declarator must have the form of | |
5678 | a function declarator. */ | |
5679 | ||
f8893e47 | 5680 | if (funcdef_flag && !funcdef_syntax) |
6574d78e | 5681 | return NULL_TREE; |
51e29401 | 5682 | |
51e29401 RS |
5683 | /* If this looks like a function definition, make it one, |
5684 | even if it occurs where parms are expected. | |
5685 | Then store_parm_decls will reject it and not use it as a parm. */ | |
f75fbaf7 | 5686 | if (decl_context == NORMAL && !funcdef_flag && current_scope->parm_flag) |
51e29401 RS |
5687 | decl_context = PARM; |
5688 | ||
deb176fa | 5689 | if (declspecs->deprecated_p && deprecated_state != DEPRECATED_SUPPRESS) |
9b86d6bb | 5690 | warn_deprecated_use (declspecs->type, declspecs->decl_attr); |
51e29401 | 5691 | |
5c076987 JM |
5692 | if ((decl_context == NORMAL || decl_context == FIELD) |
5693 | && current_scope == file_scope | |
5694 | && variably_modified_type_p (type, NULL_TREE)) | |
5695 | { | |
88388a52 | 5696 | if (name) |
c2255bc4 | 5697 | error_at (loc, "variably modified %qE at file scope", name); |
88388a52 | 5698 | else |
c2255bc4 | 5699 | error_at (loc, "variably modified field at file scope"); |
5c076987 JM |
5700 | type = integer_type_node; |
5701 | } | |
5702 | ||
f9551830 | 5703 | size_varies = C_TYPE_VARIABLE_SIZE (type) != 0; |
51e29401 | 5704 | |
98c3a782 | 5705 | /* Diagnose defaulting to "int". */ |
720283f2 | 5706 | |
8400e75e | 5707 | if (declspecs->default_int_p && !in_system_header_at (input_location)) |
51e29401 | 5708 | { |
98c3a782 JM |
5709 | /* Issue a warning if this is an ISO C 99 program or if |
5710 | -Wreturn-type and this is a function, or if -Wimplicit; | |
5711 | prefer the former warning since it is more explicit. */ | |
5712 | if ((warn_implicit_int || warn_return_type || flag_isoc99) | |
5713 | && funcdef_flag) | |
5714 | warn_about_return_type = 1; | |
88388a52 JM |
5715 | else |
5716 | { | |
5717 | if (name) | |
92574c7c | 5718 | warn_defaults_to (loc, OPT_Wimplicit_int, |
35aff4fb MP |
5719 | "type defaults to %<int%> in declaration " |
5720 | "of %qE", name); | |
88388a52 | 5721 | else |
92574c7c | 5722 | warn_defaults_to (loc, OPT_Wimplicit_int, |
35aff4fb | 5723 | "type defaults to %<int%> in type name"); |
88388a52 | 5724 | } |
51e29401 RS |
5725 | } |
5726 | ||
98c3a782 JM |
5727 | /* Adjust the type if a bit-field is being declared, |
5728 | -funsigned-bitfields applied and the type is not explicitly | |
5729 | "signed". */ | |
5730 | if (bitfield && !flag_signed_bitfields && !declspecs->explicit_signed_p | |
5731 | && TREE_CODE (type) == INTEGER_TYPE) | |
726a989a | 5732 | type = unsigned_type_for (type); |
51e29401 | 5733 | |
3932261a MM |
5734 | /* Figure out the type qualifiers for the declaration. There are |
5735 | two ways a declaration can become qualified. One is something | |
5736 | like `const int i' where the `const' is explicit. Another is | |
5737 | something like `typedef const int CI; CI i' where the type of the | |
85b58ca5 JM |
5738 | declaration contains the `const'. A third possibility is that |
5739 | there is a type qualifier on the element type of a typedefed | |
5740 | array type, in which case we should extract that qualifier so | |
5f04ff80 | 5741 | that c_apply_type_quals_to_decl receives the full list of |
85b58ca5 JM |
5742 | qualifiers to work with (C90 is not entirely clear about whether |
5743 | duplicate qualifiers should be diagnosed in this case, but it | |
5744 | seems most appropriate to do so). */ | |
5745 | element_type = strip_array_types (type); | |
3b53cddc JM |
5746 | constp = declspecs->const_p + TYPE_READONLY (element_type); |
5747 | restrictp = declspecs->restrict_p + TYPE_RESTRICT (element_type); | |
5748 | volatilep = declspecs->volatile_p + TYPE_VOLATILE (element_type); | |
267bac10 | 5749 | atomicp = declspecs->atomic_p + TYPE_ATOMIC (element_type); |
36c5e70a BE |
5750 | as1 = declspecs->address_space; |
5751 | as2 = TYPE_ADDR_SPACE (element_type); | |
5752 | address_space = ADDR_SPACE_GENERIC_P (as1)? as2 : as1; | |
5753 | ||
f3bede71 MP |
5754 | if (constp > 1) |
5755 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<const%>"); | |
5756 | if (restrictp > 1) | |
5757 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<restrict%>"); | |
5758 | if (volatilep > 1) | |
5759 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<volatile%>"); | |
5760 | if (atomicp > 1) | |
5761 | pedwarn_c90 (loc, OPT_Wpedantic, "duplicate %<_Atomic%>"); | |
36c5e70a BE |
5762 | |
5763 | if (!ADDR_SPACE_GENERIC_P (as1) && !ADDR_SPACE_GENERIC_P (as2) && as1 != as2) | |
5764 | error_at (loc, "conflicting named address spaces (%s vs %s)", | |
5765 | c_addr_space_name (as1), c_addr_space_name (as2)); | |
5766 | ||
411cdbd8 RG |
5767 | if ((TREE_CODE (type) == ARRAY_TYPE |
5768 | || first_non_attr_kind == cdk_array) | |
5769 | && TYPE_QUALS (element_type)) | |
e9e32ee6 JM |
5770 | { |
5771 | orig_qual_type = type; | |
5772 | type = TYPE_MAIN_VARIANT (type); | |
5773 | } | |
3932261a MM |
5774 | type_quals = ((constp ? TYPE_QUAL_CONST : 0) |
5775 | | (restrictp ? TYPE_QUAL_RESTRICT : 0) | |
36c5e70a | 5776 | | (volatilep ? TYPE_QUAL_VOLATILE : 0) |
267bac10 | 5777 | | (atomicp ? TYPE_QUAL_ATOMIC : 0) |
36c5e70a | 5778 | | ENCODE_QUAL_ADDR_SPACE (address_space)); |
e9e32ee6 JM |
5779 | if (type_quals != TYPE_QUALS (element_type)) |
5780 | orig_qual_type = NULL_TREE; | |
51e29401 | 5781 | |
267bac10 JM |
5782 | /* Applying the _Atomic qualifier to an array type (through the use |
5783 | of typedefs or typeof) must be detected here. If the qualifier | |
5784 | is introduced later, any appearance of applying it to an array is | |
5785 | actually applying it to an element of that array. */ | |
5786 | if (atomicp && TREE_CODE (type) == ARRAY_TYPE) | |
5787 | error_at (loc, "%<_Atomic%>-qualified array type"); | |
5788 | ||
9a26d6ee JM |
5789 | /* Warn about storage classes that are invalid for certain |
5790 | kinds of declarations (parameters, typenames, etc.). */ | |
5791 | ||
5792 | if (funcdef_flag | |
5793 | && (threadp | |
5794 | || storage_class == csc_auto | |
5795 | || storage_class == csc_register | |
5796 | || storage_class == csc_typedef)) | |
5797 | { | |
fcf73884 | 5798 | if (storage_class == csc_auto) |
b8698a0f | 5799 | pedwarn (loc, |
c1771a20 | 5800 | (current_scope == file_scope) ? 0 : OPT_Wpedantic, |
fcf73884 | 5801 | "function definition declared %<auto%>"); |
9a26d6ee | 5802 | if (storage_class == csc_register) |
c2255bc4 | 5803 | error_at (loc, "function definition declared %<register%>"); |
9a26d6ee | 5804 | if (storage_class == csc_typedef) |
c2255bc4 | 5805 | error_at (loc, "function definition declared %<typedef%>"); |
9a26d6ee | 5806 | if (threadp) |
582d9b50 JM |
5807 | error_at (loc, "function definition declared %qs", |
5808 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
5809 | threadp = false; |
5810 | if (storage_class == csc_auto | |
5811 | || storage_class == csc_register | |
5812 | || storage_class == csc_typedef) | |
5813 | storage_class = csc_none; | |
5814 | } | |
5815 | else if (decl_context != NORMAL && (storage_class != csc_none || threadp)) | |
5816 | { | |
5817 | if (decl_context == PARM && storage_class == csc_register) | |
5818 | ; | |
5819 | else | |
5820 | { | |
5821 | switch (decl_context) | |
5822 | { | |
5823 | case FIELD: | |
88388a52 | 5824 | if (name) |
c2255bc4 AH |
5825 | error_at (loc, "storage class specified for structure " |
5826 | "field %qE", name); | |
88388a52 | 5827 | else |
c2255bc4 | 5828 | error_at (loc, "storage class specified for structure field"); |
9a26d6ee JM |
5829 | break; |
5830 | case PARM: | |
88388a52 | 5831 | if (name) |
c2255bc4 AH |
5832 | error_at (loc, "storage class specified for parameter %qE", |
5833 | name); | |
88388a52 | 5834 | else |
c2255bc4 | 5835 | error_at (loc, "storage class specified for unnamed parameter"); |
9a26d6ee JM |
5836 | break; |
5837 | default: | |
c2255bc4 | 5838 | error_at (loc, "storage class specified for typename"); |
9a26d6ee JM |
5839 | break; |
5840 | } | |
5841 | storage_class = csc_none; | |
5842 | threadp = false; | |
5843 | } | |
5844 | } | |
5845 | else if (storage_class == csc_extern | |
5846 | && initialized | |
5847 | && !funcdef_flag) | |
5848 | { | |
5849 | /* 'extern' with initialization is invalid if not at file scope. */ | |
b8b47f42 GDR |
5850 | if (current_scope == file_scope) |
5851 | { | |
5852 | /* It is fine to have 'extern const' when compiling at C | |
5853 | and C++ intersection. */ | |
5854 | if (!(warn_cxx_compat && constp)) | |
c2255bc4 AH |
5855 | warning_at (loc, 0, "%qE initialized and declared %<extern%>", |
5856 | name); | |
b8b47f42 | 5857 | } |
9a26d6ee | 5858 | else |
c2255bc4 | 5859 | error_at (loc, "%qE has both %<extern%> and initializer", name); |
9a26d6ee JM |
5860 | } |
5861 | else if (current_scope == file_scope) | |
5862 | { | |
5863 | if (storage_class == csc_auto) | |
c2255bc4 AH |
5864 | error_at (loc, "file-scope declaration of %qE specifies %<auto%>", |
5865 | name); | |
9a26d6ee | 5866 | if (pedantic && storage_class == csc_register) |
c1771a20 | 5867 | pedwarn (input_location, OPT_Wpedantic, |
88388a52 | 5868 | "file-scope declaration of %qE specifies %<register%>", name); |
9a26d6ee JM |
5869 | } |
5870 | else | |
5871 | { | |
5872 | if (storage_class == csc_extern && funcdef_flag) | |
c2255bc4 | 5873 | error_at (loc, "nested function %qE declared %<extern%>", name); |
9a26d6ee JM |
5874 | else if (threadp && storage_class == csc_none) |
5875 | { | |
c2255bc4 | 5876 | error_at (loc, "function-scope %qE implicitly auto and declared " |
582d9b50 JM |
5877 | "%qs", name, |
5878 | declspecs->thread_gnu_p ? "__thread" : "_Thread_local"); | |
9a26d6ee JM |
5879 | threadp = false; |
5880 | } | |
5881 | } | |
51e29401 RS |
5882 | |
5883 | /* Now figure out the structure of the declarator proper. | |
5884 | Descend through it, creating more complex types, until we reach | |
46df2823 JM |
5885 | the declared identifier (or NULL_TREE, in an absolute declarator). |
5886 | At each stage we maintain an unqualified version of the type | |
5887 | together with any qualifiers that should be applied to it with | |
5888 | c_build_qualified_type; this way, array types including | |
5889 | multidimensional array types are first built up in unqualified | |
5890 | form and then the qualified form is created with | |
5891 | TYPE_MAIN_VARIANT pointing to the unqualified form. */ | |
51e29401 | 5892 | |
f8893e47 | 5893 | while (declarator && declarator->kind != cdk_id) |
51e29401 RS |
5894 | { |
5895 | if (type == error_mark_node) | |
5896 | { | |
f8893e47 | 5897 | declarator = declarator->declarator; |
51e29401 RS |
5898 | continue; |
5899 | } | |
5900 | ||
f8893e47 JM |
5901 | /* Each level of DECLARATOR is either a cdk_array (for ...[..]), |
5902 | a cdk_pointer (for *...), | |
5903 | a cdk_function (for ...(...)), | |
5904 | a cdk_attrs (for nested attributes), | |
5905 | or a cdk_id (for the name being declared | |
5906 | or the place in an absolute declarator | |
51e29401 | 5907 | where the name was omitted). |
f8893e47 | 5908 | For the last case, we have just exited the loop. |
51e29401 RS |
5909 | |
5910 | At this point, TYPE is the type of elements of an array, | |
5911 | or for a function to return, or for a pointer to point to. | |
5912 | After this sequence of ifs, TYPE is the type of the | |
5913 | array or function or pointer, and DECLARATOR has had its | |
5914 | outermost layer removed. */ | |
5915 | ||
3b53cddc JM |
5916 | if (array_ptr_quals != TYPE_UNQUALIFIED |
5917 | || array_ptr_attrs != NULL_TREE | |
5918 | || array_parm_static) | |
0e03329a JM |
5919 | { |
5920 | /* Only the innermost declarator (making a parameter be of | |
5921 | array type which is converted to pointer type) | |
5922 | may have static or type qualifiers. */ | |
c2255bc4 | 5923 | error_at (loc, "static or type qualifiers in non-parameter array declarator"); |
3b53cddc JM |
5924 | array_ptr_quals = TYPE_UNQUALIFIED; |
5925 | array_ptr_attrs = NULL_TREE; | |
e3455240 | 5926 | array_parm_static = false; |
0e03329a JM |
5927 | } |
5928 | ||
f8893e47 | 5929 | switch (declarator->kind) |
51e29401 | 5930 | { |
f8893e47 | 5931 | case cdk_attrs: |
366de0ce | 5932 | { |
f8893e47 JM |
5933 | /* A declarator with embedded attributes. */ |
5934 | tree attrs = declarator->u.attrs; | |
5935 | const struct c_declarator *inner_decl; | |
366de0ce | 5936 | int attr_flags = 0; |
f8893e47 | 5937 | declarator = declarator->declarator; |
366de0ce | 5938 | inner_decl = declarator; |
f8893e47 JM |
5939 | while (inner_decl->kind == cdk_attrs) |
5940 | inner_decl = inner_decl->declarator; | |
5941 | if (inner_decl->kind == cdk_id) | |
366de0ce | 5942 | attr_flags |= (int) ATTR_FLAG_DECL_NEXT; |
f8893e47 | 5943 | else if (inner_decl->kind == cdk_function) |
366de0ce | 5944 | attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT; |
f8893e47 | 5945 | else if (inner_decl->kind == cdk_array) |
366de0ce NS |
5946 | attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT; |
5947 | returned_attrs = decl_attributes (&type, | |
5948 | chainon (returned_attrs, attrs), | |
5949 | attr_flags); | |
5950 | break; | |
5951 | } | |
f8893e47 | 5952 | case cdk_array: |
366de0ce NS |
5953 | { |
5954 | tree itype = NULL_TREE; | |
f8893e47 | 5955 | tree size = declarator->u.array.dimen; |
366de0ce NS |
5956 | /* The index is a signed object `sizetype' bits wide. */ |
5957 | tree index_type = c_common_signed_type (sizetype); | |
5958 | ||
f8893e47 | 5959 | array_ptr_quals = declarator->u.array.quals; |
3b53cddc | 5960 | array_ptr_attrs = declarator->u.array.attrs; |
f8893e47 | 5961 | array_parm_static = declarator->u.array.static_p; |
52ffd86e MS |
5962 | array_parm_vla_unspec_p = declarator->u.array.vla_unspec_p; |
5963 | ||
f8893e47 | 5964 | declarator = declarator->declarator; |
366de0ce NS |
5965 | |
5966 | /* Check for some types that there cannot be arrays of. */ | |
c22cacf3 | 5967 | |
366de0ce NS |
5968 | if (VOID_TYPE_P (type)) |
5969 | { | |
88388a52 | 5970 | if (name) |
c2255bc4 | 5971 | error_at (loc, "declaration of %qE as array of voids", name); |
88388a52 | 5972 | else |
c2255bc4 | 5973 | error_at (loc, "declaration of type name as array of voids"); |
366de0ce NS |
5974 | type = error_mark_node; |
5975 | } | |
c22cacf3 | 5976 | |
366de0ce NS |
5977 | if (TREE_CODE (type) == FUNCTION_TYPE) |
5978 | { | |
88388a52 | 5979 | if (name) |
c2255bc4 AH |
5980 | error_at (loc, "declaration of %qE as array of functions", |
5981 | name); | |
88388a52 | 5982 | else |
c2255bc4 AH |
5983 | error_at (loc, "declaration of type name as array of " |
5984 | "functions"); | |
366de0ce NS |
5985 | type = error_mark_node; |
5986 | } | |
c22cacf3 | 5987 | |
8400e75e DM |
5988 | if (pedantic && !in_system_header_at (input_location) |
5989 | && flexible_array_type_p (type)) | |
c1771a20 | 5990 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 5991 | "invalid use of structure with flexible array member"); |
c22cacf3 | 5992 | |
366de0ce | 5993 | if (size == error_mark_node) |
51e29401 | 5994 | type = error_mark_node; |
c22cacf3 | 5995 | |
366de0ce NS |
5996 | if (type == error_mark_node) |
5997 | continue; | |
e9a25f70 | 5998 | |
366de0ce NS |
5999 | /* If size was specified, set ITYPE to a range-type for |
6000 | that size. Otherwise, ITYPE remains null. finish_decl | |
6001 | may figure it out from an initial value. */ | |
a25f1211 | 6002 | |
366de0ce NS |
6003 | if (size) |
6004 | { | |
928c19bb JM |
6005 | bool size_maybe_const = true; |
6006 | bool size_int_const = (TREE_CODE (size) == INTEGER_CST | |
6007 | && !TREE_OVERFLOW (size)); | |
6008 | bool this_size_varies = false; | |
6009 | ||
366de0ce NS |
6010 | /* Strip NON_LVALUE_EXPRs since we aren't using as an |
6011 | lvalue. */ | |
6012 | STRIP_TYPE_NOPS (size); | |
c22cacf3 | 6013 | |
3f75a254 | 6014 | if (!INTEGRAL_TYPE_P (TREE_TYPE (size))) |
366de0ce | 6015 | { |
88388a52 | 6016 | if (name) |
c2255bc4 | 6017 | error_at (loc, "size of array %qE has non-integer type", |
7176a4a0 | 6018 | name); |
88388a52 | 6019 | else |
c2255bc4 | 6020 | error_at (loc, |
7176a4a0 MP |
6021 | "size of unnamed array has non-integer type"); |
6022 | size = integer_one_node; | |
6023 | } | |
6024 | /* This can happen with enum forward declaration. */ | |
6025 | else if (!COMPLETE_TYPE_P (TREE_TYPE (size))) | |
6026 | { | |
6027 | if (name) | |
6028 | error_at (loc, "size of array %qE has incomplete type", | |
6029 | name); | |
6030 | else | |
6031 | error_at (loc, "size of unnamed array has incomplete " | |
6032 | "type"); | |
366de0ce NS |
6033 | size = integer_one_node; |
6034 | } | |
c22cacf3 | 6035 | |
928c19bb JM |
6036 | size = c_fully_fold (size, false, &size_maybe_const); |
6037 | ||
6038 | if (pedantic && size_maybe_const && integer_zerop (size)) | |
88388a52 JM |
6039 | { |
6040 | if (name) | |
c1771a20 | 6041 | pedwarn (loc, OPT_Wpedantic, |
88388a52 JM |
6042 | "ISO C forbids zero-size array %qE", name); |
6043 | else | |
c1771a20 | 6044 | pedwarn (loc, OPT_Wpedantic, |
88388a52 JM |
6045 | "ISO C forbids zero-size array"); |
6046 | } | |
c22cacf3 | 6047 | |
928c19bb | 6048 | if (TREE_CODE (size) == INTEGER_CST && size_maybe_const) |
366de0ce NS |
6049 | { |
6050 | constant_expression_warning (size); | |
6051 | if (tree_int_cst_sgn (size) < 0) | |
6052 | { | |
88388a52 | 6053 | if (name) |
c2255bc4 | 6054 | error_at (loc, "size of array %qE is negative", name); |
88388a52 | 6055 | else |
c2255bc4 | 6056 | error_at (loc, "size of unnamed array is negative"); |
366de0ce NS |
6057 | size = integer_one_node; |
6058 | } | |
928c19bb JM |
6059 | /* Handle a size folded to an integer constant but |
6060 | not an integer constant expression. */ | |
6061 | if (!size_int_const) | |
6062 | { | |
6ccb2a4a JM |
6063 | /* If this is a file scope declaration of an |
6064 | ordinary identifier, this is invalid code; | |
6065 | diagnosing it here and not subsequently | |
6066 | treating the type as variable-length avoids | |
6067 | more confusing diagnostics later. */ | |
6068 | if ((decl_context == NORMAL || decl_context == FIELD) | |
6069 | && current_scope == file_scope) | |
6070 | pedwarn (input_location, 0, | |
88388a52 JM |
6071 | "variably modified %qE at file scope", |
6072 | name); | |
6ccb2a4a | 6073 | else |
f9551830 | 6074 | this_size_varies = size_varies = true; |
88388a52 | 6075 | warn_variable_length_array (name, size); |
928c19bb | 6076 | } |
366de0ce | 6077 | } |
5c076987 JM |
6078 | else if ((decl_context == NORMAL || decl_context == FIELD) |
6079 | && current_scope == file_scope) | |
6080 | { | |
c2255bc4 | 6081 | error_at (loc, "variably modified %qE at file scope", name); |
5c076987 JM |
6082 | size = integer_one_node; |
6083 | } | |
366de0ce NS |
6084 | else |
6085 | { | |
6086 | /* Make sure the array size remains visibly | |
6087 | nonconstant even if it is (eg) a const variable | |
6088 | with known value. */ | |
f9551830 | 6089 | this_size_varies = size_varies = true; |
88388a52 | 6090 | warn_variable_length_array (name, size); |
45b2222a | 6091 | if (sanitize_flags_p (SANITIZE_VLA) |
f34ebeb2 | 6092 | && current_function_decl != NULL_TREE |
45b2222a | 6093 | && decl_context == NORMAL) |
b906f4ca MP |
6094 | { |
6095 | /* Evaluate the array size only once. */ | |
b2fa0a8b | 6096 | size = save_expr (size); |
b906f4ca MP |
6097 | size = c_fully_fold (size, false, NULL); |
6098 | size = fold_build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
6099 | ubsan_instrument_vla (loc, size), | |
6100 | size); | |
6101 | } | |
366de0ce | 6102 | } |
51e29401 | 6103 | |
928c19bb | 6104 | if (integer_zerop (size) && !this_size_varies) |
366de0ce | 6105 | { |
c22cacf3 MS |
6106 | /* A zero-length array cannot be represented with |
6107 | an unsigned index type, which is what we'll | |
6108 | get with build_index_type. Create an | |
6109 | open-ended range instead. */ | |
366de0ce NS |
6110 | itype = build_range_type (sizetype, size, NULL_TREE); |
6111 | } | |
6112 | else | |
6113 | { | |
8b0b9aef RH |
6114 | /* Arrange for the SAVE_EXPR on the inside of the |
6115 | MINUS_EXPR, which allows the -1 to get folded | |
6116 | with the +1 that happens when building TYPE_SIZE. */ | |
6117 | if (size_varies) | |
a04a722b | 6118 | size = save_expr (size); |
928c19bb JM |
6119 | if (this_size_varies && TREE_CODE (size) == INTEGER_CST) |
6120 | size = build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
6121 | integer_zero_node, size); | |
8b0b9aef | 6122 | |
366de0ce NS |
6123 | /* Compute the maximum valid index, that is, size |
6124 | - 1. Do the calculation in index_type, so that | |
6125 | if it is a variable the computations will be | |
6126 | done in the proper mode. */ | |
db3927fb AH |
6127 | itype = fold_build2_loc (loc, MINUS_EXPR, index_type, |
6128 | convert (index_type, size), | |
6129 | convert (index_type, | |
6130 | size_one_node)); | |
366de0ce | 6131 | |
60a45536 RG |
6132 | /* The above overflows when size does not fit |
6133 | in index_type. | |
6134 | ??? While a size of INT_MAX+1 technically shouldn't | |
6135 | cause an overflow (because we subtract 1), handling | |
6136 | this case seems like an unnecessary complication. */ | |
6137 | if (TREE_CODE (size) == INTEGER_CST | |
6138 | && !int_fits_type_p (size, index_type)) | |
366de0ce | 6139 | { |
88388a52 | 6140 | if (name) |
c2255bc4 AH |
6141 | error_at (loc, "size of array %qE is too large", |
6142 | name); | |
88388a52 | 6143 | else |
c2255bc4 | 6144 | error_at (loc, "size of unnamed array is too large"); |
366de0ce NS |
6145 | type = error_mark_node; |
6146 | continue; | |
6147 | } | |
c22cacf3 | 6148 | |
366de0ce NS |
6149 | itype = build_index_type (itype); |
6150 | } | |
928c19bb JM |
6151 | if (this_size_varies) |
6152 | { | |
6153 | if (*expr) | |
6154 | *expr = build2 (COMPOUND_EXPR, TREE_TYPE (size), | |
6155 | *expr, size); | |
6156 | else | |
6157 | *expr = size; | |
6158 | *expr_const_operands &= size_maybe_const; | |
6159 | } | |
366de0ce NS |
6160 | } |
6161 | else if (decl_context == FIELD) | |
6162 | { | |
1de2c900 | 6163 | bool flexible_array_member = false; |
062c4bb3 JM |
6164 | if (array_parm_vla_unspec_p) |
6165 | /* Field names can in fact have function prototype | |
6166 | scope so [*] is disallowed here through making | |
6167 | the field variably modified, not through being | |
6168 | something other than a declaration with function | |
6169 | prototype scope. */ | |
f9551830 | 6170 | size_varies = true; |
1de2c900 JM |
6171 | else |
6172 | { | |
6173 | const struct c_declarator *t = declarator; | |
6174 | while (t->kind == cdk_attrs) | |
6175 | t = t->declarator; | |
6176 | flexible_array_member = (t->kind == cdk_id); | |
6177 | } | |
6178 | if (flexible_array_member | |
8400e75e | 6179 | && !in_system_header_at (input_location)) |
f3bede71 MP |
6180 | pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not " |
6181 | "support flexible array members"); | |
c7b82833 | 6182 | |
366de0ce NS |
6183 | /* ISO C99 Flexible array members are effectively |
6184 | identical to GCC's zero-length array extension. */ | |
1de2c900 JM |
6185 | if (flexible_array_member || array_parm_vla_unspec_p) |
6186 | itype = build_range_type (sizetype, size_zero_node, | |
6187 | NULL_TREE); | |
366de0ce | 6188 | } |
52ffd86e MS |
6189 | else if (decl_context == PARM) |
6190 | { | |
6191 | if (array_parm_vla_unspec_p) | |
6192 | { | |
52ffd86e | 6193 | itype = build_range_type (sizetype, size_zero_node, NULL_TREE); |
f9551830 | 6194 | size_varies = true; |
52ffd86e MS |
6195 | } |
6196 | } | |
8d9f82d5 AO |
6197 | else if (decl_context == TYPENAME) |
6198 | { | |
6199 | if (array_parm_vla_unspec_p) | |
6200 | { | |
062c4bb3 JM |
6201 | /* C99 6.7.5.2p4 */ |
6202 | warning (0, "%<[*]%> not in a declaration"); | |
6203 | /* We use this to avoid messing up with incomplete | |
6204 | array types of the same type, that would | |
6205 | otherwise be modified below. */ | |
8d9f82d5 AO |
6206 | itype = build_range_type (sizetype, size_zero_node, |
6207 | NULL_TREE); | |
f9551830 | 6208 | size_varies = true; |
8d9f82d5 AO |
6209 | } |
6210 | } | |
51e29401 | 6211 | |
636b4106 | 6212 | /* Complain about arrays of incomplete types. */ |
b4519d39 SB |
6213 | if (!COMPLETE_TYPE_P (type)) |
6214 | { | |
e5d9235b MP |
6215 | error_at (loc, "array type has incomplete element type %qT", |
6216 | type); | |
00083992 MP |
6217 | /* See if we can be more helpful. */ |
6218 | if (TREE_CODE (type) == ARRAY_TYPE) | |
6219 | { | |
6220 | if (name) | |
6221 | inform (loc, "declaration of %qE as multidimensional " | |
6222 | "array must have bounds for all dimensions " | |
6223 | "except the first", name); | |
6224 | else | |
6225 | inform (loc, "declaration of multidimensional array " | |
6226 | "must have bounds for all dimensions except " | |
6227 | "the first"); | |
6228 | } | |
c22cacf3 | 6229 | type = error_mark_node; |
b4519d39 SB |
6230 | } |
6231 | else | |
8d9f82d5 AO |
6232 | /* When itype is NULL, a shared incomplete array type is |
6233 | returned for all array of a given type. Elsewhere we | |
6234 | make sure we don't complete that type before copying | |
6235 | it, but here we want to make sure we don't ever | |
6236 | modify the shared type, so we gcc_assert (itype) | |
6237 | below. */ | |
36c5e70a BE |
6238 | { |
6239 | addr_space_t as = DECODE_QUAL_ADDR_SPACE (type_quals); | |
6240 | if (!ADDR_SPACE_GENERIC_P (as) && as != TYPE_ADDR_SPACE (type)) | |
6241 | type = build_qualified_type (type, | |
6242 | ENCODE_QUAL_ADDR_SPACE (as)); | |
6243 | ||
6244 | type = build_array_type (type, itype); | |
6245 | } | |
51e29401 | 6246 | |
9df594d7 | 6247 | if (type != error_mark_node) |
366de0ce | 6248 | { |
9df594d7 | 6249 | if (size_varies) |
5c076987 | 6250 | { |
8d9f82d5 AO |
6251 | /* It is ok to modify type here even if itype is |
6252 | NULL: if size_varies, we're in a | |
96ff6c8c | 6253 | multi-dimensional array and the inner type has |
8d9f82d5 AO |
6254 | variable size, so the enclosing shared array type |
6255 | must too. */ | |
5c076987 JM |
6256 | if (size && TREE_CODE (size) == INTEGER_CST) |
6257 | type | |
6258 | = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
6259 | C_TYPE_VARIABLE_SIZE (type) = 1; | |
6260 | } | |
9df594d7 RG |
6261 | |
6262 | /* The GCC extension for zero-length arrays differs from | |
6263 | ISO flexible array members in that sizeof yields | |
6264 | zero. */ | |
6265 | if (size && integer_zerop (size)) | |
6266 | { | |
8d9f82d5 | 6267 | gcc_assert (itype); |
8c4353b7 | 6268 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); |
9df594d7 RG |
6269 | TYPE_SIZE (type) = bitsize_zero_node; |
6270 | TYPE_SIZE_UNIT (type) = size_zero_node; | |
e4a95933 | 6271 | SET_TYPE_STRUCTURAL_EQUALITY (type); |
9df594d7 | 6272 | } |
52ffd86e MS |
6273 | if (array_parm_vla_unspec_p) |
6274 | { | |
8d9f82d5 | 6275 | gcc_assert (itype); |
52ffd86e | 6276 | /* The type is complete. C99 6.7.5.2p4 */ |
8c4353b7 | 6277 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); |
52ffd86e MS |
6278 | TYPE_SIZE (type) = bitsize_zero_node; |
6279 | TYPE_SIZE_UNIT (type) = size_zero_node; | |
e4a95933 | 6280 | SET_TYPE_STRUCTURAL_EQUALITY (type); |
52ffd86e | 6281 | } |
e78bede6 MP |
6282 | |
6283 | if (!valid_array_size_p (loc, type, name)) | |
6284 | type = error_mark_node; | |
366de0ce | 6285 | } |
51e29401 | 6286 | |
366de0ce | 6287 | if (decl_context != PARM |
3b53cddc JM |
6288 | && (array_ptr_quals != TYPE_UNQUALIFIED |
6289 | || array_ptr_attrs != NULL_TREE | |
6290 | || array_parm_static)) | |
366de0ce | 6291 | { |
e78bede6 MP |
6292 | error_at (loc, "static or type qualifiers in non-parameter " |
6293 | "array declarator"); | |
3b53cddc JM |
6294 | array_ptr_quals = TYPE_UNQUALIFIED; |
6295 | array_ptr_attrs = NULL_TREE; | |
e3455240 | 6296 | array_parm_static = false; |
366de0ce | 6297 | } |
e9e32ee6 | 6298 | orig_qual_indirect++; |
366de0ce NS |
6299 | break; |
6300 | } | |
f8893e47 | 6301 | case cdk_function: |
366de0ce NS |
6302 | { |
6303 | /* Say it's a definition only for the declarator closest | |
6304 | to the identifier, apart possibly from some | |
6305 | attributes. */ | |
6306 | bool really_funcdef = false; | |
6307 | tree arg_types; | |
e9e32ee6 | 6308 | orig_qual_type = NULL_TREE; |
366de0ce NS |
6309 | if (funcdef_flag) |
6310 | { | |
f8893e47 JM |
6311 | const struct c_declarator *t = declarator->declarator; |
6312 | while (t->kind == cdk_attrs) | |
6313 | t = t->declarator; | |
6314 | really_funcdef = (t->kind == cdk_id); | |
366de0ce | 6315 | } |
51e29401 | 6316 | |
366de0ce NS |
6317 | /* Declaring a function type. Make sure we have a valid |
6318 | type for the function to return. */ | |
6319 | if (type == error_mark_node) | |
6320 | continue; | |
c22cacf3 | 6321 | |
f9551830 | 6322 | size_varies = false; |
51e29401 | 6323 | |
366de0ce NS |
6324 | /* Warn about some types functions can't return. */ |
6325 | if (TREE_CODE (type) == FUNCTION_TYPE) | |
6326 | { | |
88388a52 | 6327 | if (name) |
c2255bc4 AH |
6328 | error_at (loc, "%qE declared as function returning a " |
6329 | "function", name); | |
88388a52 | 6330 | else |
c2255bc4 AH |
6331 | error_at (loc, "type name declared as function " |
6332 | "returning a function"); | |
366de0ce NS |
6333 | type = integer_type_node; |
6334 | } | |
6335 | if (TREE_CODE (type) == ARRAY_TYPE) | |
6336 | { | |
88388a52 | 6337 | if (name) |
c2255bc4 AH |
6338 | error_at (loc, "%qE declared as function returning an array", |
6339 | name); | |
88388a52 | 6340 | else |
c2255bc4 AH |
6341 | error_at (loc, "type name declared as function returning " |
6342 | "an array"); | |
366de0ce NS |
6343 | type = integer_type_node; |
6344 | } | |
51e29401 | 6345 | |
366de0ce NS |
6346 | /* Construct the function type and go to the next |
6347 | inner layer of declarator. */ | |
f8893e47 | 6348 | arg_info = declarator->u.arg_info; |
366de0ce | 6349 | arg_types = grokparms (arg_info, really_funcdef); |
51e29401 | 6350 | |
366de0ce NS |
6351 | /* Type qualifiers before the return type of the function |
6352 | qualify the return type, not the function type. */ | |
6353 | if (type_quals) | |
6354 | { | |
8a14afd0 BS |
6355 | const enum c_declspec_word ignored_quals_list[] = |
6356 | { | |
6357 | cdw_const, cdw_volatile, cdw_restrict, cdw_address_space, | |
6358 | cdw_atomic, cdw_number_of_elements | |
6359 | }; | |
6360 | location_t specs_loc | |
6361 | = smallest_type_quals_location (declspecs->locations, | |
6362 | ignored_quals_list); | |
6363 | if (specs_loc == UNKNOWN_LOCATION) | |
6364 | specs_loc = declspecs->locations[cdw_typedef]; | |
6365 | if (specs_loc == UNKNOWN_LOCATION) | |
6366 | specs_loc = loc; | |
6367 | ||
c22cacf3 | 6368 | /* Type qualifiers on a function return type are |
366de0ce NS |
6369 | normally permitted by the standard but have no |
6370 | effect, so give a warning at -Wreturn-type. | |
6371 | Qualifiers on a void return type are banned on | |
6372 | function definitions in ISO C; GCC used to used | |
aa4b467b JM |
6373 | them for noreturn functions. The resolution of C11 |
6374 | DR#423 means qualifiers (other than _Atomic) are | |
6375 | actually removed from the return type when | |
6376 | determining the function type. */ | |
8a14afd0 | 6377 | int quals_used = type_quals; |
aa4b467b JM |
6378 | if (flag_isoc11) |
6379 | quals_used &= TYPE_QUAL_ATOMIC; | |
6380 | if (quals_used && VOID_TYPE_P (type) && really_funcdef) | |
8a14afd0 | 6381 | pedwarn (specs_loc, 0, |
509c9d60 | 6382 | "function definition has qualified void return type"); |
44c21c7f | 6383 | else |
8a14afd0 | 6384 | warning_at (specs_loc, OPT_Wignored_qualifiers, |
44c21c7f | 6385 | "type qualifiers ignored on function return type"); |
c22cacf3 | 6386 | |
aa4b467b JM |
6387 | /* Ensure an error for restrict on invalid types; the |
6388 | DR#423 resolution is not entirely clear about | |
6389 | this. */ | |
6390 | if (flag_isoc11 | |
6391 | && (type_quals & TYPE_QUAL_RESTRICT) | |
6392 | && (!POINTER_TYPE_P (type) | |
6393 | || !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type)))) | |
6394 | error_at (loc, "invalid use of %<restrict%>"); | |
6395 | if (quals_used) | |
6396 | type = c_build_qualified_type (type, quals_used); | |
366de0ce NS |
6397 | } |
6398 | type_quals = TYPE_UNQUALIFIED; | |
c22cacf3 | 6399 | |
366de0ce | 6400 | type = build_function_type (type, arg_types); |
f8893e47 | 6401 | declarator = declarator->declarator; |
c22cacf3 | 6402 | |
366de0ce NS |
6403 | /* Set the TYPE_CONTEXTs for each tagged type which is local to |
6404 | the formal parameter list of this FUNCTION_TYPE to point to | |
6405 | the FUNCTION_TYPE node itself. */ | |
e0c9fbb7 | 6406 | { |
e60bf9d4 NF |
6407 | c_arg_tag *tag; |
6408 | unsigned ix; | |
c22cacf3 | 6409 | |
9771b263 | 6410 | FOR_EACH_VEC_SAFE_ELT_REVERSE (arg_info->tags, ix, tag) |
e60bf9d4 | 6411 | TYPE_CONTEXT (tag->type) = type; |
e0c9fbb7 | 6412 | } |
366de0ce NS |
6413 | break; |
6414 | } | |
f8893e47 | 6415 | case cdk_pointer: |
51e29401 | 6416 | { |
366de0ce NS |
6417 | /* Merge any constancy or volatility into the target type |
6418 | for the pointer. */ | |
267bac10 JM |
6419 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6420 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6421 | { | |
6422 | error_at (loc, | |
6423 | "%<_Atomic%>-qualified function type"); | |
6424 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6425 | } | |
6426 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6427 | && type_quals) | |
c1771a20 | 6428 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6429 | "ISO C forbids qualified function types"); |
366de0ce | 6430 | if (type_quals) |
e9e32ee6 JM |
6431 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6432 | orig_qual_indirect); | |
6433 | orig_qual_type = NULL_TREE; | |
f9551830 | 6434 | size_varies = false; |
3b53cddc | 6435 | |
706c4bb7 OH |
6436 | /* When the pointed-to type involves components of variable size, |
6437 | care must be taken to ensure that the size evaluation code is | |
6438 | emitted early enough to dominate all the possible later uses | |
6439 | and late enough for the variables on which it depends to have | |
6440 | been assigned. | |
6441 | ||
6442 | This is expected to happen automatically when the pointed-to | |
6443 | type has a name/declaration of it's own, but special attention | |
6444 | is required if the type is anonymous. | |
6445 | ||
6446 | We handle the NORMAL and FIELD contexts here by attaching an | |
6447 | artificial TYPE_DECL to such pointed-to type. This forces the | |
6448 | sizes evaluation at a safe point and ensures it is not deferred | |
6449 | until e.g. within a deeper conditional context. | |
6450 | ||
6451 | We expect nothing to be needed here for PARM or TYPENAME. | |
6452 | Pushing a TYPE_DECL at this point for TYPENAME would actually | |
6453 | be incorrect, as we might be in the middle of an expression | |
6454 | with side effects on the pointed-to type size "arguments" prior | |
6455 | to the pointer declaration point and the fake TYPE_DECL in the | |
6456 | enclosing context would force the size evaluation prior to the | |
6457 | side effects. */ | |
6458 | ||
6459 | if (!TYPE_NAME (type) | |
6460 | && (decl_context == NORMAL || decl_context == FIELD) | |
6461 | && variably_modified_type_p (type, NULL_TREE)) | |
6462 | { | |
c2255bc4 | 6463 | tree decl = build_decl (loc, TYPE_DECL, NULL_TREE, type); |
706c4bb7 OH |
6464 | DECL_ARTIFICIAL (decl) = 1; |
6465 | pushdecl (decl); | |
c2255bc4 | 6466 | finish_decl (decl, loc, NULL_TREE, NULL_TREE, NULL_TREE); |
706c4bb7 OH |
6467 | TYPE_NAME (type) = decl; |
6468 | } | |
6469 | ||
412cd719 | 6470 | type = c_build_pointer_type (type); |
c22cacf3 | 6471 | |
deb176fa JM |
6472 | /* Process type qualifiers (such as const or volatile) |
6473 | that were given inside the `*'. */ | |
3b53cddc | 6474 | type_quals = declarator->u.pointer_quals; |
deb176fa | 6475 | |
f8893e47 | 6476 | declarator = declarator->declarator; |
366de0ce | 6477 | break; |
51e29401 | 6478 | } |
366de0ce NS |
6479 | default: |
6480 | gcc_unreachable (); | |
51e29401 | 6481 | } |
51e29401 | 6482 | } |
b9baeecd | 6483 | *decl_attrs = chainon (returned_attrs, *decl_attrs); |
51e29401 | 6484 | |
46df2823 JM |
6485 | /* Now TYPE has the actual type, apart from any qualifiers in |
6486 | TYPE_QUALS. */ | |
51e29401 | 6487 | |
36c5e70a BE |
6488 | /* Warn about address space used for things other than static memory or |
6489 | pointers. */ | |
6490 | address_space = DECODE_QUAL_ADDR_SPACE (type_quals); | |
6491 | if (!ADDR_SPACE_GENERIC_P (address_space)) | |
6492 | { | |
6493 | if (decl_context == NORMAL) | |
6494 | { | |
6495 | switch (storage_class) | |
6496 | { | |
6497 | case csc_auto: | |
6498 | error ("%qs combined with %<auto%> qualifier for %qE", | |
6499 | c_addr_space_name (address_space), name); | |
6500 | break; | |
6501 | case csc_register: | |
6502 | error ("%qs combined with %<register%> qualifier for %qE", | |
6503 | c_addr_space_name (address_space), name); | |
6504 | break; | |
6505 | case csc_none: | |
6506 | if (current_function_scope) | |
6507 | { | |
6508 | error ("%qs specified for auto variable %qE", | |
6509 | c_addr_space_name (address_space), name); | |
6510 | break; | |
6511 | } | |
6512 | break; | |
6513 | case csc_static: | |
6514 | case csc_extern: | |
6515 | case csc_typedef: | |
6516 | break; | |
6517 | default: | |
6518 | gcc_unreachable (); | |
6519 | } | |
6520 | } | |
6521 | else if (decl_context == PARM && TREE_CODE (type) != ARRAY_TYPE) | |
6522 | { | |
6523 | if (name) | |
6524 | error ("%qs specified for parameter %qE", | |
6525 | c_addr_space_name (address_space), name); | |
6526 | else | |
6527 | error ("%qs specified for unnamed parameter", | |
6528 | c_addr_space_name (address_space)); | |
6529 | } | |
6530 | else if (decl_context == FIELD) | |
6531 | { | |
6532 | if (name) | |
6533 | error ("%qs specified for structure field %qE", | |
6534 | c_addr_space_name (address_space), name); | |
6535 | else | |
6536 | error ("%qs specified for structure field", | |
6537 | c_addr_space_name (address_space)); | |
6538 | } | |
6539 | } | |
6540 | ||
d134f39e JM |
6541 | /* Check the type and width of a bit-field. */ |
6542 | if (bitfield) | |
267bac10 | 6543 | { |
420a9d9b | 6544 | check_bitfield_type_and_width (loc, &type, width, name); |
267bac10 JM |
6545 | /* C11 makes it implementation-defined (6.7.2.1#5) whether |
6546 | atomic types are permitted for bit-fields; we have no code to | |
6547 | make bit-field accesses atomic, so disallow them. */ | |
6548 | if (type_quals & TYPE_QUAL_ATOMIC) | |
6549 | { | |
6550 | if (name) | |
191a6b94 | 6551 | error_at (loc, "bit-field %qE has atomic type", name); |
267bac10 | 6552 | else |
191a6b94 | 6553 | error_at (loc, "bit-field has atomic type"); |
267bac10 JM |
6554 | type_quals &= ~TYPE_QUAL_ATOMIC; |
6555 | } | |
6556 | } | |
d134f39e | 6557 | |
d19fa6b5 JM |
6558 | /* Reject invalid uses of _Alignas. */ |
6559 | if (declspecs->alignas_p) | |
6560 | { | |
6561 | if (storage_class == csc_typedef) | |
6562 | error_at (loc, "alignment specified for typedef %qE", name); | |
6563 | else if (storage_class == csc_register) | |
6564 | error_at (loc, "alignment specified for %<register%> object %qE", | |
6565 | name); | |
6566 | else if (decl_context == PARM) | |
6567 | { | |
6568 | if (name) | |
6569 | error_at (loc, "alignment specified for parameter %qE", name); | |
6570 | else | |
6571 | error_at (loc, "alignment specified for unnamed parameter"); | |
6572 | } | |
6573 | else if (bitfield) | |
6574 | { | |
6575 | if (name) | |
6576 | error_at (loc, "alignment specified for bit-field %qE", name); | |
6577 | else | |
6578 | error_at (loc, "alignment specified for unnamed bit-field"); | |
6579 | } | |
6580 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6581 | error_at (loc, "alignment specified for function %qE", name); | |
92a5f2ba | 6582 | else if (declspecs->align_log != -1 && TYPE_P (type)) |
d19fa6b5 JM |
6583 | { |
6584 | alignas_align = 1U << declspecs->align_log; | |
2793eeab | 6585 | if (alignas_align < min_align_of_type (type)) |
d19fa6b5 JM |
6586 | { |
6587 | if (name) | |
6588 | error_at (loc, "%<_Alignas%> specifiers cannot reduce " | |
6589 | "alignment of %qE", name); | |
6590 | else | |
6591 | error_at (loc, "%<_Alignas%> specifiers cannot reduce " | |
6592 | "alignment of unnamed field"); | |
6593 | alignas_align = 0; | |
6594 | } | |
6595 | } | |
6596 | } | |
6597 | ||
51e29401 RS |
6598 | /* If this is declaring a typedef name, return a TYPE_DECL. */ |
6599 | ||
9a26d6ee | 6600 | if (storage_class == csc_typedef) |
51e29401 RS |
6601 | { |
6602 | tree decl; | |
267bac10 JM |
6603 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6604 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6605 | { | |
6606 | error_at (loc, | |
6607 | "%<_Atomic%>-qualified function type"); | |
6608 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6609 | } | |
6610 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6611 | && type_quals) | |
c1771a20 | 6612 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6613 | "ISO C forbids qualified function types"); |
3932261a | 6614 | if (type_quals) |
e9e32ee6 JM |
6615 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6616 | orig_qual_indirect); | |
c2255bc4 AH |
6617 | decl = build_decl (declarator->id_loc, |
6618 | TYPE_DECL, declarator->u.id, type); | |
98c3a782 | 6619 | if (declspecs->explicit_signed_p) |
51e29401 | 6620 | C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1; |
61f4f1cc | 6621 | if (declspecs->inline_p) |
c2255bc4 | 6622 | pedwarn (loc, 0,"typedef %q+D declared %<inline%>", decl); |
bbceee64 JM |
6623 | if (declspecs->noreturn_p) |
6624 | pedwarn (loc, 0,"typedef %q+D declared %<_Noreturn%>", decl); | |
7e5487a2 ILT |
6625 | |
6626 | if (warn_cxx_compat && declarator->u.id != NULL_TREE) | |
6627 | { | |
6628 | struct c_binding *b = I_TAG_BINDING (declarator->u.id); | |
6629 | ||
6630 | if (b != NULL | |
6631 | && b->decl != NULL_TREE | |
6632 | && (B_IN_CURRENT_SCOPE (b) | |
6633 | || (current_scope == file_scope && B_IN_EXTERNAL_SCOPE (b))) | |
6634 | && TYPE_MAIN_VARIANT (b->decl) != TYPE_MAIN_VARIANT (type)) | |
6635 | { | |
bb85aa74 MP |
6636 | if (warning_at (declarator->id_loc, OPT_Wc___compat, |
6637 | ("using %qD as both a typedef and a tag is " | |
6638 | "invalid in C++"), decl) | |
6639 | && b->locus != UNKNOWN_LOCATION) | |
7e5487a2 ILT |
6640 | inform (b->locus, "originally defined here"); |
6641 | } | |
6642 | } | |
6643 | ||
51e29401 RS |
6644 | return decl; |
6645 | } | |
6646 | ||
51e29401 RS |
6647 | /* If this is a type name (such as, in a cast or sizeof), |
6648 | compute the type and return it now. */ | |
6649 | ||
6650 | if (decl_context == TYPENAME) | |
6651 | { | |
61f4f1cc JM |
6652 | /* Note that the grammar rejects storage classes in typenames |
6653 | and fields. */ | |
6654 | gcc_assert (storage_class == csc_none && !threadp | |
bbceee64 | 6655 | && !declspecs->inline_p && !declspecs->noreturn_p); |
267bac10 JM |
6656 | if ((type_quals & TYPE_QUAL_ATOMIC) |
6657 | && TREE_CODE (type) == FUNCTION_TYPE) | |
6658 | { | |
6659 | error_at (loc, | |
6660 | "%<_Atomic%>-qualified function type"); | |
6661 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6662 | } | |
6663 | else if (pedantic && TREE_CODE (type) == FUNCTION_TYPE | |
6664 | && type_quals) | |
c1771a20 | 6665 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6666 | "ISO C forbids const or volatile function types"); |
3932261a | 6667 | if (type_quals) |
e9e32ee6 JM |
6668 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6669 | orig_qual_indirect); | |
51e29401 RS |
6670 | return type; |
6671 | } | |
6672 | ||
52ffd86e MS |
6673 | if (pedantic && decl_context == FIELD |
6674 | && variably_modified_type_p (type, NULL_TREE)) | |
6675 | { | |
6676 | /* C99 6.7.2.1p8 */ | |
c1771a20 | 6677 | pedwarn (loc, OPT_Wpedantic, "a member of a structure or union cannot " |
c2255bc4 | 6678 | "have a variably modified type"); |
52ffd86e MS |
6679 | } |
6680 | ||
61df2ee2 RS |
6681 | /* Aside from typedefs and type names (handle above), |
6682 | `void' at top level (not within pointer) | |
6683 | is allowed only in public variables. | |
51e29401 RS |
6684 | We don't complain about parms either, but that is because |
6685 | a better error message can be made later. */ | |
6686 | ||
71653180 | 6687 | if (VOID_TYPE_P (type) && decl_context != PARM |
3f75a254 | 6688 | && !((decl_context != FIELD && TREE_CODE (type) != FUNCTION_TYPE) |
9a26d6ee | 6689 | && (storage_class == csc_extern |
f75fbaf7 | 6690 | || (current_scope == file_scope |
9a26d6ee JM |
6691 | && !(storage_class == csc_static |
6692 | || storage_class == csc_register))))) | |
51e29401 | 6693 | { |
c2255bc4 | 6694 | error_at (loc, "variable or field %qE declared void", name); |
51e29401 RS |
6695 | type = integer_type_node; |
6696 | } | |
6697 | ||
6698 | /* Now create the decl, which may be a VAR_DECL, a PARM_DECL | |
6699 | or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */ | |
6700 | ||
6701 | { | |
91d231cb | 6702 | tree decl; |
51e29401 RS |
6703 | |
6704 | if (decl_context == PARM) | |
6705 | { | |
c530479e | 6706 | tree promoted_type; |
773ec47f | 6707 | bool array_parameter_p = false; |
51e29401 RS |
6708 | |
6709 | /* A parameter declared as an array of T is really a pointer to T. | |
6710 | One declared as a function is really a pointer to a function. */ | |
6711 | ||
6712 | if (TREE_CODE (type) == ARRAY_TYPE) | |
6713 | { | |
6714 | /* Transfer const-ness of array into that of type pointed to. */ | |
eaf2e788 | 6715 | type = TREE_TYPE (type); |
66189108 MP |
6716 | if (orig_qual_type != NULL_TREE) |
6717 | { | |
6718 | if (orig_qual_indirect == 0) | |
6719 | orig_qual_type = TREE_TYPE (orig_qual_type); | |
6720 | else | |
6721 | orig_qual_indirect--; | |
6722 | } | |
3932261a | 6723 | if (type_quals) |
e9e32ee6 JM |
6724 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6725 | orig_qual_indirect); | |
412cd719 | 6726 | type = c_build_pointer_type (type); |
3b53cddc | 6727 | type_quals = array_ptr_quals; |
b09869ff JM |
6728 | if (type_quals) |
6729 | type = c_build_qualified_type (type, type_quals); | |
0e03329a | 6730 | |
3b53cddc JM |
6731 | /* We don't yet implement attributes in this context. */ |
6732 | if (array_ptr_attrs != NULL_TREE) | |
c2255bc4 AH |
6733 | warning_at (loc, OPT_Wattributes, |
6734 | "attributes in parameter array declarator ignored"); | |
0e03329a | 6735 | |
f9551830 | 6736 | size_varies = false; |
773ec47f | 6737 | array_parameter_p = true; |
51e29401 RS |
6738 | } |
6739 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6740 | { | |
267bac10 JM |
6741 | if (type_quals & TYPE_QUAL_ATOMIC) |
6742 | { | |
6743 | error_at (loc, | |
6744 | "%<_Atomic%>-qualified function type"); | |
6745 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6746 | } | |
6747 | else if (type_quals) | |
c1771a20 | 6748 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6749 | "ISO C forbids qualified function types"); |
3932261a MM |
6750 | if (type_quals) |
6751 | type = c_build_qualified_type (type, type_quals); | |
412cd719 | 6752 | type = c_build_pointer_type (type); |
3932261a | 6753 | type_quals = TYPE_UNQUALIFIED; |
51e29401 | 6754 | } |
0f38b811 MM |
6755 | else if (type_quals) |
6756 | type = c_build_qualified_type (type, type_quals); | |
35b1a6fa | 6757 | |
c2255bc4 AH |
6758 | decl = build_decl (declarator->id_loc, |
6759 | PARM_DECL, declarator->u.id, type); | |
929f3671 | 6760 | if (size_varies) |
51e29401 | 6761 | C_DECL_VARIABLE_SIZE (decl) = 1; |
773ec47f | 6762 | C_ARRAY_PARAMETER (decl) = array_parameter_p; |
51e29401 RS |
6763 | |
6764 | /* Compute the type actually passed in the parmlist, | |
6765 | for the case where there is no prototype. | |
6766 | (For example, shorts and chars are passed as ints.) | |
6767 | When there is a prototype, this is overridden later. */ | |
6768 | ||
c530479e RH |
6769 | if (type == error_mark_node) |
6770 | promoted_type = type; | |
6771 | else | |
ab393bf1 | 6772 | promoted_type = c_type_promotes_to (type); |
51e29401 | 6773 | |
c530479e | 6774 | DECL_ARG_TYPE (decl) = promoted_type; |
61f4f1cc | 6775 | if (declspecs->inline_p) |
c2255bc4 | 6776 | pedwarn (loc, 0, "parameter %q+D declared %<inline%>", decl); |
bbceee64 JM |
6777 | if (declspecs->noreturn_p) |
6778 | pedwarn (loc, 0, "parameter %q+D declared %<_Noreturn%>", decl); | |
51e29401 RS |
6779 | } |
6780 | else if (decl_context == FIELD) | |
6781 | { | |
61f4f1cc JM |
6782 | /* Note that the grammar rejects storage classes in typenames |
6783 | and fields. */ | |
6784 | gcc_assert (storage_class == csc_none && !threadp | |
bbceee64 | 6785 | && !declspecs->inline_p && !declspecs->noreturn_p); |
61f4f1cc | 6786 | |
51e29401 | 6787 | /* Structure field. It may not be a function. */ |
dfd48d76 | 6788 | |
51e29401 RS |
6789 | if (TREE_CODE (type) == FUNCTION_TYPE) |
6790 | { | |
c2255bc4 | 6791 | error_at (loc, "field %qE declared as a function", name); |
51e29401 RS |
6792 | type = build_pointer_type (type); |
6793 | } | |
d0f062fb | 6794 | else if (TREE_CODE (type) != ERROR_MARK |
c22cacf3 | 6795 | && !COMPLETE_OR_UNBOUND_ARRAY_TYPE_P (type)) |
51e29401 | 6796 | { |
1202aec1 | 6797 | if (name) |
c2255bc4 | 6798 | error_at (loc, "field %qE has incomplete type", name); |
1202aec1 | 6799 | else |
c2255bc4 | 6800 | error_at (loc, "unnamed field has incomplete type"); |
51e29401 RS |
6801 | type = error_mark_node; |
6802 | } | |
065d214c MP |
6803 | else if (TREE_CODE (type) == ARRAY_TYPE |
6804 | && TYPE_DOMAIN (type) == NULL_TREE) | |
6805 | { | |
6806 | /* We have a flexible array member through a typedef. | |
6807 | Set suitable range. Whether this is a correct position | |
6808 | for a flexible array member will be determined elsewhere. */ | |
6809 | if (!in_system_header_at (input_location)) | |
6810 | pedwarn_c90 (loc, OPT_Wpedantic, "ISO C90 does not " | |
6811 | "support flexible array members"); | |
6812 | type = build_distinct_type_copy (TYPE_MAIN_VARIANT (type)); | |
6813 | TYPE_DOMAIN (type) = build_range_type (sizetype, size_zero_node, | |
6814 | NULL_TREE); | |
b95a64bb JJ |
6815 | if (orig_qual_indirect == 0) |
6816 | orig_qual_type = NULL_TREE; | |
065d214c | 6817 | } |
e9e32ee6 JM |
6818 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6819 | orig_qual_indirect); | |
c2255bc4 AH |
6820 | decl = build_decl (declarator->id_loc, |
6821 | FIELD_DECL, declarator->u.id, type); | |
2bf105ab | 6822 | DECL_NONADDRESSABLE_P (decl) = bitfield; |
ab53bae2 | 6823 | if (bitfield && !declarator->u.id) |
974aedcc MP |
6824 | { |
6825 | TREE_NO_WARNING (decl) = 1; | |
6826 | DECL_PADDING_P (decl) = 1; | |
6827 | } | |
2bf105ab | 6828 | |
929f3671 | 6829 | if (size_varies) |
51e29401 RS |
6830 | C_DECL_VARIABLE_SIZE (decl) = 1; |
6831 | } | |
6832 | else if (TREE_CODE (type) == FUNCTION_TYPE) | |
6833 | { | |
9a26d6ee | 6834 | if (storage_class == csc_register || threadp) |
1ac0ac8b | 6835 | { |
c2255bc4 | 6836 | error_at (loc, "invalid storage class for function %qE", name); |
636b4106 | 6837 | } |
ff164b22 GK |
6838 | else if (current_scope != file_scope) |
6839 | { | |
6840 | /* Function declaration not at file scope. Storage | |
6841 | classes other than `extern' are not allowed, C99 | |
6842 | 6.7.1p5, and `extern' makes no difference. However, | |
6843 | GCC allows 'auto', perhaps with 'inline', to support | |
6844 | nested functions. */ | |
9a26d6ee | 6845 | if (storage_class == csc_auto) |
c1771a20 | 6846 | pedwarn (loc, OPT_Wpedantic, |
88388a52 | 6847 | "invalid storage class for function %qE", name); |
6f17bbcf | 6848 | else if (storage_class == csc_static) |
1ac0ac8b | 6849 | { |
c2255bc4 | 6850 | error_at (loc, "invalid storage class for function %qE", name); |
c22cacf3 | 6851 | if (funcdef_flag) |
6f17bbcf JM |
6852 | storage_class = declspecs->storage_class = csc_none; |
6853 | else | |
6574d78e | 6854 | return NULL_TREE; |
1ac0ac8b | 6855 | } |
ff164b22 | 6856 | } |
fd0b8fce | 6857 | |
c2255bc4 AH |
6858 | decl = build_decl (declarator->id_loc, |
6859 | FUNCTION_DECL, declarator->u.id, type); | |
6f17bbcf JM |
6860 | decl = build_decl_attribute_variant (decl, decl_attr); |
6861 | ||
267bac10 JM |
6862 | if (type_quals & TYPE_QUAL_ATOMIC) |
6863 | { | |
6864 | error_at (loc, | |
6865 | "%<_Atomic%>-qualified function type"); | |
6866 | type_quals &= ~TYPE_QUAL_ATOMIC; | |
6867 | } | |
6868 | else if (pedantic && type_quals && !DECL_IN_SYSTEM_HEADER (decl)) | |
c1771a20 | 6869 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 6870 | "ISO C forbids qualified function types"); |
51e29401 | 6871 | |
9affb2c7 ZW |
6872 | /* Every function declaration is an external reference |
6873 | (DECL_EXTERNAL) except for those which are not at file | |
6874 | scope and are explicitly declared "auto". This is | |
6875 | forbidden by standard C (C99 6.7.1p5) and is interpreted by | |
6876 | GCC to signify a forward declaration of a nested function. */ | |
9a26d6ee | 6877 | if (storage_class == csc_auto && current_scope != file_scope) |
9affb2c7 | 6878 | DECL_EXTERNAL (decl) = 0; |
71113fcd GK |
6879 | /* In C99, a function which is declared 'inline' with 'extern' |
6880 | is not an external reference (which is confusing). It | |
6881 | means that the later definition of the function must be output | |
6882 | in this file, C99 6.7.4p6. In GNU C89, a function declared | |
6883 | 'extern inline' is an external reference. */ | |
6884 | else if (declspecs->inline_p && storage_class != csc_static) | |
da1c7394 ILT |
6885 | DECL_EXTERNAL (decl) = ((storage_class == csc_extern) |
6886 | == flag_gnu89_inline); | |
9affb2c7 | 6887 | else |
71113fcd | 6888 | DECL_EXTERNAL (decl) = !initialized; |
caf93cb0 | 6889 | |
51e29401 RS |
6890 | /* Record absence of global scope for `static' or `auto'. */ |
6891 | TREE_PUBLIC (decl) | |
9a26d6ee | 6892 | = !(storage_class == csc_static || storage_class == csc_auto); |
c40f7b33 | 6893 | |
77dbdb57 | 6894 | /* For a function definition, record the argument information |
7b112487 | 6895 | block where store_parm_decls will look for it. */ |
77dbdb57 | 6896 | if (funcdef_flag) |
7b112487 | 6897 | current_function_arg_info = arg_info; |
77dbdb57 | 6898 | |
98c3a782 | 6899 | if (declspecs->default_int_p) |
5ce89b2e JM |
6900 | C_FUNCTION_IMPLICIT_INT (decl) = 1; |
6901 | ||
bbceee64 JM |
6902 | /* Record presence of `inline' and `_Noreturn', if it is |
6903 | reasonable. */ | |
61f4f1cc | 6904 | if (flag_hosted && MAIN_NAME_P (declarator->u.id)) |
51e29401 | 6905 | { |
9a26d6ee | 6906 | if (declspecs->inline_p) |
c2255bc4 | 6907 | pedwarn (loc, 0, "cannot inline function %<main%>"); |
bbceee64 JM |
6908 | if (declspecs->noreturn_p) |
6909 | pedwarn (loc, 0, "%<main%> declared %<_Noreturn%>"); | |
6910 | } | |
6911 | else | |
6912 | { | |
6913 | if (declspecs->inline_p) | |
6914 | /* Record that the function is declared `inline'. */ | |
6915 | DECL_DECLARED_INLINE_P (decl) = 1; | |
6916 | if (declspecs->noreturn_p) | |
c4b3a0a0 | 6917 | { |
35aff4fb MP |
6918 | if (flag_isoc99) |
6919 | pedwarn_c99 (loc, OPT_Wpedantic, | |
c4b3a0a0 | 6920 | "ISO C99 does not support %<_Noreturn%>"); |
35aff4fb MP |
6921 | else |
6922 | pedwarn_c99 (loc, OPT_Wpedantic, | |
c4b3a0a0 | 6923 | "ISO C90 does not support %<_Noreturn%>"); |
c4b3a0a0 JM |
6924 | TREE_THIS_VOLATILE (decl) = 1; |
6925 | } | |
31ed8fea | 6926 | } |
51e29401 RS |
6927 | } |
6928 | else | |
6929 | { | |
6930 | /* It's a variable. */ | |
fd0b8fce | 6931 | /* An uninitialized decl with `extern' is a reference. */ |
9a26d6ee | 6932 | int extern_ref = !initialized && storage_class == csc_extern; |
51e29401 | 6933 | |
e9e32ee6 JM |
6934 | type = c_build_qualified_type (type, type_quals, orig_qual_type, |
6935 | orig_qual_indirect); | |
f4e92987 | 6936 | |
f75fbaf7 ZW |
6937 | /* C99 6.2.2p7: It is invalid (compile-time undefined |
6938 | behavior) to create an 'extern' declaration for a | |
f4e92987 | 6939 | variable if there is a global declaration that is |
f75fbaf7 ZW |
6940 | 'static' and the global declaration is not visible. |
6941 | (If the static declaration _is_ currently visible, | |
6942 | the 'extern' declaration is taken to refer to that decl.) */ | |
6943 | if (extern_ref && current_scope != file_scope) | |
f4e92987 | 6944 | { |
f8893e47 JM |
6945 | tree global_decl = identifier_global_value (declarator->u.id); |
6946 | tree visible_decl = lookup_name (declarator->u.id); | |
f4e92987 | 6947 | |
35b1a6fa | 6948 | if (global_decl |
f75fbaf7 | 6949 | && global_decl != visible_decl |
0ae9bd27 | 6950 | && VAR_P (global_decl) |
f4e92987 | 6951 | && !TREE_PUBLIC (global_decl)) |
c2255bc4 AH |
6952 | error_at (loc, "variable previously declared %<static%> " |
6953 | "redeclared %<extern%>"); | |
f4e92987 MM |
6954 | } |
6955 | ||
c2255bc4 AH |
6956 | decl = build_decl (declarator->id_loc, |
6957 | VAR_DECL, declarator->u.id, type); | |
929f3671 | 6958 | if (size_varies) |
51e29401 RS |
6959 | C_DECL_VARIABLE_SIZE (decl) = 1; |
6960 | ||
9a26d6ee | 6961 | if (declspecs->inline_p) |
c2255bc4 | 6962 | pedwarn (loc, 0, "variable %q+D declared %<inline%>", decl); |
bbceee64 JM |
6963 | if (declspecs->noreturn_p) |
6964 | pedwarn (loc, 0, "variable %q+D declared %<_Noreturn%>", decl); | |
51e29401 | 6965 | |
bbbcb2e1 JM |
6966 | /* At file scope, an initialized extern declaration may follow |
6967 | a static declaration. In that case, DECL_EXTERNAL will be | |
6968 | reset later in start_decl. */ | |
9a26d6ee | 6969 | DECL_EXTERNAL (decl) = (storage_class == csc_extern); |
3d78f2e9 | 6970 | |
f8521984 | 6971 | /* At file scope, the presence of a `static' or `register' storage |
ee534ebf RS |
6972 | class specifier, or the absence of all storage class specifiers |
6973 | makes this declaration a definition (perhaps tentative). Also, | |
fcc207bf | 6974 | the absence of `static' makes it public. */ |
f75fbaf7 | 6975 | if (current_scope == file_scope) |
51e29401 | 6976 | { |
fcc207bf | 6977 | TREE_PUBLIC (decl) = storage_class != csc_static; |
3d78f2e9 | 6978 | TREE_STATIC (decl) = !extern_ref; |
51e29401 | 6979 | } |
f8521984 | 6980 | /* Not at file scope, only `static' makes a static definition. */ |
51e29401 RS |
6981 | else |
6982 | { | |
9a26d6ee | 6983 | TREE_STATIC (decl) = (storage_class == csc_static); |
3d78f2e9 RH |
6984 | TREE_PUBLIC (decl) = extern_ref; |
6985 | } | |
6986 | ||
9a26d6ee | 6987 | if (threadp) |
56363ffd | 6988 | set_decl_tls_model (decl, decl_default_tls_model (decl)); |
51e29401 RS |
6989 | } |
6990 | ||
92f6fd0b JM |
6991 | if ((storage_class == csc_extern |
6992 | || (storage_class == csc_none | |
6993 | && TREE_CODE (type) == FUNCTION_TYPE | |
6994 | && !funcdef_flag)) | |
52ffd86e MS |
6995 | && variably_modified_type_p (type, NULL_TREE)) |
6996 | { | |
6997 | /* C99 6.7.5.2p2 */ | |
92f6fd0b | 6998 | if (TREE_CODE (type) == FUNCTION_TYPE) |
c2255bc4 | 6999 | error_at (loc, "non-nested function with variably modified type"); |
92f6fd0b | 7000 | else |
c2255bc4 AH |
7001 | error_at (loc, "object with variably modified type must have " |
7002 | "no linkage"); | |
52ffd86e MS |
7003 | } |
7004 | ||
51e29401 RS |
7005 | /* Record `register' declaration for warnings on & |
7006 | and in case doing stupid register allocation. */ | |
7007 | ||
9a26d6ee | 7008 | if (storage_class == csc_register) |
5baeaac0 JM |
7009 | { |
7010 | C_DECL_REGISTER (decl) = 1; | |
7011 | DECL_REGISTER (decl) = 1; | |
7012 | } | |
51e29401 RS |
7013 | |
7014 | /* Record constancy and volatility. */ | |
3932261a | 7015 | c_apply_type_quals_to_decl (type_quals, decl); |
51e29401 | 7016 | |
d19fa6b5 JM |
7017 | /* Apply _Alignas specifiers. */ |
7018 | if (alignas_align) | |
7019 | { | |
fe37c7af | 7020 | SET_DECL_ALIGN (decl, alignas_align * BITS_PER_UNIT); |
d19fa6b5 JM |
7021 | DECL_USER_ALIGN (decl) = 1; |
7022 | } | |
7023 | ||
51e29401 RS |
7024 | /* If a type has volatile components, it should be stored in memory. |
7025 | Otherwise, the fact that those components are volatile | |
820cc88f DB |
7026 | will be ignored, and would even crash the compiler. |
7027 | Of course, this only makes sense on VAR,PARM, and RESULT decl's. */ | |
7028 | if (C_TYPE_FIELDS_VOLATILE (TREE_TYPE (decl)) | |
0ae9bd27 | 7029 | && (VAR_P (decl) || TREE_CODE (decl) == PARM_DECL |
820cc88f | 7030 | || TREE_CODE (decl) == RESULT_DECL)) |
5baeaac0 JM |
7031 | { |
7032 | /* It is not an error for a structure with volatile fields to | |
7033 | be declared register, but reset DECL_REGISTER since it | |
7034 | cannot actually go in a register. */ | |
7035 | int was_reg = C_DECL_REGISTER (decl); | |
7036 | C_DECL_REGISTER (decl) = 0; | |
7037 | DECL_REGISTER (decl) = 0; | |
7038 | c_mark_addressable (decl); | |
7039 | C_DECL_REGISTER (decl) = was_reg; | |
7040 | } | |
51e29401 | 7041 | |
d05cc98e GK |
7042 | /* This is the earliest point at which we might know the assembler |
7043 | name of a variable. Thus, if it's known before this, die horribly. */ | |
a92f6726 NS |
7044 | gcc_assert (!HAS_DECL_ASSEMBLER_NAME_P (decl) |
7045 | || !DECL_ASSEMBLER_NAME_SET_P (decl)); | |
d05cc98e | 7046 | |
88eeff6f | 7047 | if (warn_cxx_compat |
0ae9bd27 | 7048 | && VAR_P (decl) |
88eeff6f ILT |
7049 | && TREE_PUBLIC (decl) |
7050 | && TREE_STATIC (decl) | |
3e636daf | 7051 | && (RECORD_OR_UNION_TYPE_P (TREE_TYPE (decl)) |
88eeff6f ILT |
7052 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) |
7053 | && TYPE_NAME (TREE_TYPE (decl)) == NULL_TREE) | |
7054 | warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wc___compat, | |
7055 | ("non-local variable %qD with anonymous type is " | |
7056 | "questionable in C++"), | |
7057 | decl); | |
7058 | ||
51e29401 RS |
7059 | return decl; |
7060 | } | |
7061 | } | |
7062 | \f | |
51e29401 | 7063 | /* Decode the parameter-list info for a function type or function definition. |
52ffd86e | 7064 | The argument is the value returned by `get_parm_info' (or made in c-parse.c |
51e29401 RS |
7065 | if there is an identifier list instead of a parameter decl list). |
7066 | These two functions are separate because when a function returns | |
7067 | or receives functions then each is called multiple times but the order | |
7068 | of calls is different. The last call to `grokparms' is always the one | |
7069 | that contains the formal parameter names of a function definition. | |
7070 | ||
51e29401 RS |
7071 | Return a list of arg types to use in the FUNCTION_TYPE for this function. |
7072 | ||
60919bce | 7073 | FUNCDEF_FLAG is true for a function definition, false for |
51e29401 | 7074 | a mere declaration. A nonempty identifier-list gets an error message |
60919bce | 7075 | when FUNCDEF_FLAG is false. */ |
51e29401 RS |
7076 | |
7077 | static tree | |
f8893e47 | 7078 | grokparms (struct c_arg_info *arg_info, bool funcdef_flag) |
51e29401 | 7079 | { |
f8893e47 | 7080 | tree arg_types = arg_info->types; |
51e29401 | 7081 | |
52ffd86e MS |
7082 | if (funcdef_flag && arg_info->had_vla_unspec) |
7083 | { | |
7084 | /* A function definition isn't function prototype scope C99 6.2.1p4. */ | |
7085 | /* C99 6.7.5.2p4 */ | |
7086 | error ("%<[*]%> not allowed in other than function prototype scope"); | |
7087 | } | |
7088 | ||
3fa8871b | 7089 | if (arg_types == NULL_TREE && !funcdef_flag |
8400e75e | 7090 | && !in_system_header_at (input_location)) |
3176a0c2 DD |
7091 | warning (OPT_Wstrict_prototypes, |
7092 | "function declaration isn%'t a prototype"); | |
51e29401 | 7093 | |
f75fbaf7 | 7094 | if (arg_types == error_mark_node) |
6574d78e MP |
7095 | /* Don't set TYPE_ARG_TYPES in this case. */ |
7096 | return NULL_TREE; | |
f75fbaf7 ZW |
7097 | |
7098 | else if (arg_types && TREE_CODE (TREE_VALUE (arg_types)) == IDENTIFIER_NODE) | |
51e29401 | 7099 | { |
3f75a254 | 7100 | if (!funcdef_flag) |
aa3ef09b | 7101 | { |
6574d78e MP |
7102 | pedwarn (input_location, 0, "parameter names (without types) in " |
7103 | "function declaration"); | |
aa3ef09b NF |
7104 | arg_info->parms = NULL_TREE; |
7105 | } | |
7106 | else | |
7107 | arg_info->parms = arg_info->types; | |
51e29401 | 7108 | |
3fa8871b | 7109 | arg_info->types = NULL_TREE; |
6574d78e | 7110 | return NULL_TREE; |
51e29401 RS |
7111 | } |
7112 | else | |
7113 | { | |
77dbdb57 ZW |
7114 | tree parm, type, typelt; |
7115 | unsigned int parmno; | |
7116 | ||
bba5733f JM |
7117 | /* If there is a parameter of incomplete type in a definition, |
7118 | this is an error. In a declaration this is valid, and a | |
7119 | struct or union type may be completed later, before any calls | |
7120 | or definition of the function. In the case where the tag was | |
7121 | first declared within the parameter list, a warning has | |
7122 | already been given. If a parameter has void type, then | |
7123 | however the function cannot be defined or called, so | |
7124 | warn. */ | |
77dbdb57 | 7125 | |
f8893e47 | 7126 | for (parm = arg_info->parms, typelt = arg_types, parmno = 1; |
eb1dfbb2 | 7127 | parm; |
910ad8de | 7128 | parm = DECL_CHAIN (parm), typelt = TREE_CHAIN (typelt), parmno++) |
77dbdb57 ZW |
7129 | { |
7130 | type = TREE_VALUE (typelt); | |
7131 | if (type == error_mark_node) | |
7132 | continue; | |
7133 | ||
7134 | if (!COMPLETE_TYPE_P (type)) | |
7135 | { | |
7136 | if (funcdef_flag) | |
7137 | { | |
7138 | if (DECL_NAME (parm)) | |
c5d75364 MLI |
7139 | error_at (input_location, |
7140 | "parameter %u (%q+D) has incomplete type", | |
7141 | parmno, parm); | |
77dbdb57 | 7142 | else |
c5d75364 MLI |
7143 | error_at (DECL_SOURCE_LOCATION (parm), |
7144 | "parameter %u has incomplete type", | |
7145 | parmno); | |
51e29401 | 7146 | |
77dbdb57 ZW |
7147 | TREE_VALUE (typelt) = error_mark_node; |
7148 | TREE_TYPE (parm) = error_mark_node; | |
e49a760f | 7149 | arg_types = NULL_TREE; |
77dbdb57 | 7150 | } |
bba5733f | 7151 | else if (VOID_TYPE_P (type)) |
77dbdb57 ZW |
7152 | { |
7153 | if (DECL_NAME (parm)) | |
c5d75364 MLI |
7154 | warning_at (input_location, 0, |
7155 | "parameter %u (%q+D) has void type", | |
7156 | parmno, parm); | |
77dbdb57 | 7157 | else |
c5d75364 MLI |
7158 | warning_at (DECL_SOURCE_LOCATION (parm), 0, |
7159 | "parameter %u has void type", | |
7160 | parmno); | |
77dbdb57 ZW |
7161 | } |
7162 | } | |
7c47d6e9 JM |
7163 | |
7164 | if (DECL_NAME (parm) && TREE_USED (parm)) | |
7165 | warn_if_shadowing (parm); | |
77dbdb57 ZW |
7166 | } |
7167 | return arg_types; | |
51e29401 RS |
7168 | } |
7169 | } | |
7170 | ||
b3399d18 NF |
7171 | /* Allocate and initialize a c_arg_info structure from the parser's |
7172 | obstack. */ | |
7173 | ||
7174 | struct c_arg_info * | |
7175 | build_arg_info (void) | |
7176 | { | |
7177 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
7178 | ret->parms = NULL_TREE; | |
7179 | ret->tags = NULL; | |
7180 | ret->types = NULL_TREE; | |
7181 | ret->others = NULL_TREE; | |
7182 | ret->pending_sizes = NULL; | |
7183 | ret->had_vla_unspec = 0; | |
7184 | return ret; | |
7185 | } | |
7186 | ||
f8893e47 JM |
7187 | /* Take apart the current scope and return a c_arg_info structure with |
7188 | info on a parameter list just parsed. | |
77dbdb57 | 7189 | |
f8893e47 | 7190 | This structure is later fed to 'grokparms' and 'store_parm_decls'. |
51e29401 | 7191 | |
f75fbaf7 | 7192 | ELLIPSIS being true means the argument list ended in '...' so don't |
a04a722b JM |
7193 | append a sentinel (void_list_node) to the end of the type-list. |
7194 | ||
7195 | EXPR is NULL or an expression that needs to be evaluated for the | |
7196 | side effects of array size expressions in the parameters. */ | |
51e29401 | 7197 | |
f8893e47 | 7198 | struct c_arg_info * |
a04a722b | 7199 | get_parm_info (bool ellipsis, tree expr) |
51e29401 | 7200 | { |
f75fbaf7 | 7201 | struct c_binding *b = current_scope->bindings; |
b3399d18 NF |
7202 | struct c_arg_info *arg_info = build_arg_info (); |
7203 | ||
3fa8871b | 7204 | tree parms = NULL_TREE; |
9771b263 | 7205 | vec<c_arg_tag, va_gc> *tags = NULL; |
3fa8871b MP |
7206 | tree types = NULL_TREE; |
7207 | tree others = NULL_TREE; | |
f75fbaf7 | 7208 | |
55d54003 ZW |
7209 | bool gave_void_only_once_err = false; |
7210 | ||
52ffd86e | 7211 | arg_info->had_vla_unspec = current_scope->had_vla_unspec; |
f8893e47 | 7212 | |
f75fbaf7 ZW |
7213 | /* The bindings in this scope must not get put into a block. |
7214 | We will take care of deleting the binding nodes. */ | |
7215 | current_scope->bindings = 0; | |
51e29401 | 7216 | |
f75fbaf7 ZW |
7217 | /* This function is only called if there was *something* on the |
7218 | parameter list. */ | |
366de0ce | 7219 | gcc_assert (b); |
55d54003 | 7220 | |
f75fbaf7 ZW |
7221 | /* A parameter list consisting solely of 'void' indicates that the |
7222 | function takes no arguments. But if the 'void' is qualified | |
7223 | (by 'const' or 'volatile'), or has a storage class specifier | |
7224 | ('register'), then the behavior is undefined; issue an error. | |
7225 | Typedefs for 'void' are OK (see DR#157). */ | |
c22cacf3 | 7226 | if (b->prev == 0 /* one binding */ |
f75fbaf7 ZW |
7227 | && TREE_CODE (b->decl) == PARM_DECL /* which is a parameter */ |
7228 | && !DECL_NAME (b->decl) /* anonymous */ | |
7229 | && VOID_TYPE_P (TREE_TYPE (b->decl))) /* of void type */ | |
7230 | { | |
267bac10 | 7231 | if (TYPE_QUALS (TREE_TYPE (b->decl)) != TYPE_UNQUALIFIED |
5baeaac0 | 7232 | || C_DECL_REGISTER (b->decl)) |
657e4e47 | 7233 | error_at (b->locus, "%<void%> as only parameter may not be qualified"); |
55d54003 | 7234 | |
f75fbaf7 ZW |
7235 | /* There cannot be an ellipsis. */ |
7236 | if (ellipsis) | |
657e4e47 | 7237 | error_at (b->locus, "%<void%> must be the only parameter"); |
51e29401 | 7238 | |
f8893e47 | 7239 | arg_info->types = void_list_node; |
f75fbaf7 | 7240 | return arg_info; |
51e29401 RS |
7241 | } |
7242 | ||
f75fbaf7 ZW |
7243 | if (!ellipsis) |
7244 | types = void_list_node; | |
51e29401 | 7245 | |
f75fbaf7 ZW |
7246 | /* Break up the bindings list into parms, tags, types, and others; |
7247 | apply sanity checks; purge the name-to-decl bindings. */ | |
7248 | while (b) | |
51e29401 | 7249 | { |
f75fbaf7 ZW |
7250 | tree decl = b->decl; |
7251 | tree type = TREE_TYPE (decl); | |
f32682ca | 7252 | c_arg_tag tag; |
55d54003 | 7253 | const char *keyword; |
55d54003 | 7254 | |
f75fbaf7 | 7255 | switch (TREE_CODE (decl)) |
6645c3fa | 7256 | { |
f75fbaf7 ZW |
7257 | case PARM_DECL: |
7258 | if (b->id) | |
7259 | { | |
366de0ce | 7260 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 ZW |
7261 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
7262 | } | |
55d54003 | 7263 | |
f75fbaf7 ZW |
7264 | /* Check for forward decls that never got their actual decl. */ |
7265 | if (TREE_ASM_WRITTEN (decl)) | |
657e4e47 JJ |
7266 | error_at (b->locus, |
7267 | "parameter %q+D has just a forward declaration", decl); | |
f75fbaf7 ZW |
7268 | /* Check for (..., void, ...) and issue an error. */ |
7269 | else if (VOID_TYPE_P (type) && !DECL_NAME (decl)) | |
7270 | { | |
7271 | if (!gave_void_only_once_err) | |
7272 | { | |
657e4e47 | 7273 | error_at (b->locus, "%<void%> must be the only parameter"); |
f75fbaf7 ZW |
7274 | gave_void_only_once_err = true; |
7275 | } | |
7276 | } | |
7277 | else | |
7278 | { | |
7279 | /* Valid parameter, add it to the list. */ | |
910ad8de | 7280 | DECL_CHAIN (decl) = parms; |
f75fbaf7 ZW |
7281 | parms = decl; |
7282 | ||
7283 | /* Since there is a prototype, args are passed in their | |
7284 | declared types. The back end may override this later. */ | |
7285 | DECL_ARG_TYPE (decl) = type; | |
7286 | types = tree_cons (0, type, types); | |
7287 | } | |
7288 | break; | |
55d54003 | 7289 | |
56141a6a | 7290 | case ENUMERAL_TYPE: keyword = "enum"; goto tag; |
f75fbaf7 | 7291 | case UNION_TYPE: keyword = "union"; goto tag; |
56141a6a | 7292 | case RECORD_TYPE: keyword = "struct"; goto tag; |
f75fbaf7 ZW |
7293 | tag: |
7294 | /* Types may not have tag-names, in which case the type | |
7295 | appears in the bindings list with b->id NULL. */ | |
7296 | if (b->id) | |
7297 | { | |
366de0ce | 7298 | gcc_assert (I_TAG_BINDING (b->id) == b); |
f75fbaf7 ZW |
7299 | I_TAG_BINDING (b->id) = b->shadowed; |
7300 | } | |
55d54003 | 7301 | |
f75fbaf7 ZW |
7302 | /* Warn about any struct, union or enum tags defined in a |
7303 | parameter list. The scope of such types is limited to | |
7304 | the parameter list, which is rarely if ever desirable | |
7305 | (it's impossible to call such a function with type- | |
7306 | correct arguments). An anonymous union parm type is | |
7307 | meaningful as a GNU extension, so don't warn for that. */ | |
3fa8871b | 7308 | if (TREE_CODE (decl) != UNION_TYPE || b->id != NULL_TREE) |
f75fbaf7 ZW |
7309 | { |
7310 | if (b->id) | |
7311 | /* The %s will be one of 'struct', 'union', or 'enum'. */ | |
657e4e47 | 7312 | warning_at (b->locus, 0, |
46308474 LFSM |
7313 | "%<%s %E%> declared inside parameter list" |
7314 | " will not be visible outside of this definition or" | |
7315 | " declaration", keyword, b->id); | |
f75fbaf7 ZW |
7316 | else |
7317 | /* The %s will be one of 'struct', 'union', or 'enum'. */ | |
657e4e47 | 7318 | warning_at (b->locus, 0, |
46308474 LFSM |
7319 | "anonymous %s declared inside parameter list" |
7320 | " will not be visible outside of this definition or" | |
7321 | " declaration", keyword); | |
f75fbaf7 | 7322 | } |
55d54003 | 7323 | |
f32682ca DN |
7324 | tag.id = b->id; |
7325 | tag.type = decl; | |
9771b263 | 7326 | vec_safe_push (tags, tag); |
f75fbaf7 ZW |
7327 | break; |
7328 | ||
29b9828f | 7329 | case FUNCTION_DECL: |
08203f73 MP |
7330 | /* FUNCTION_DECLs appear when there is an implicit function |
7331 | declaration in the parameter list. */ | |
7332 | gcc_assert (b->nested || seen_error ()); | |
29b9828f BS |
7333 | goto set_shadowed; |
7334 | ||
f75fbaf7 ZW |
7335 | case CONST_DECL: |
7336 | case TYPE_DECL: | |
7337 | /* CONST_DECLs appear here when we have an embedded enum, | |
7338 | and TYPE_DECLs appear here when we have an embedded struct | |
7339 | or union. No warnings for this - we already warned about the | |
29b9828f | 7340 | type itself. */ |
ee060229 | 7341 | |
10e76c1a JM |
7342 | /* When we reinsert this decl in the function body, we need |
7343 | to reconstruct whether it was marked as nested. */ | |
29b9828f | 7344 | gcc_assert (!b->nested); |
910ad8de | 7345 | DECL_CHAIN (decl) = others; |
18d5f982 ZW |
7346 | others = decl; |
7347 | /* fall through */ | |
7348 | ||
7349 | case ERROR_MARK: | |
29b9828f | 7350 | set_shadowed: |
18d5f982 ZW |
7351 | /* error_mark_node appears here when we have an undeclared |
7352 | variable. Just throw it away. */ | |
f75fbaf7 ZW |
7353 | if (b->id) |
7354 | { | |
366de0ce | 7355 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
f75fbaf7 ZW |
7356 | I_SYMBOL_BINDING (b->id) = b->shadowed; |
7357 | } | |
f75fbaf7 ZW |
7358 | break; |
7359 | ||
7360 | /* Other things that might be encountered. */ | |
7361 | case LABEL_DECL: | |
f75fbaf7 | 7362 | case VAR_DECL: |
f75fbaf7 | 7363 | default: |
366de0ce | 7364 | gcc_unreachable (); |
f75fbaf7 ZW |
7365 | } |
7366 | ||
7367 | b = free_binding_and_advance (b); | |
55d54003 ZW |
7368 | } |
7369 | ||
f8893e47 JM |
7370 | arg_info->parms = parms; |
7371 | arg_info->tags = tags; | |
7372 | arg_info->types = types; | |
7373 | arg_info->others = others; | |
a04a722b | 7374 | arg_info->pending_sizes = expr; |
f75fbaf7 | 7375 | return arg_info; |
51e29401 RS |
7376 | } |
7377 | \f | |
7378 | /* Get the struct, enum or union (CODE says which) with tag NAME. | |
c2255bc4 AH |
7379 | Define the tag as a forward-reference with location LOC if it is |
7380 | not defined. Return a c_typespec structure for the type | |
7381 | specifier. */ | |
51e29401 | 7382 | |
81da229b | 7383 | struct c_typespec |
c2255bc4 | 7384 | parser_xref_tag (location_t loc, enum tree_code code, tree name) |
51e29401 | 7385 | { |
81da229b | 7386 | struct c_typespec ret; |
928c19bb | 7387 | tree ref; |
24b97832 | 7388 | location_t refloc; |
928c19bb JM |
7389 | |
7390 | ret.expr = NULL_TREE; | |
7391 | ret.expr_const_operands = true; | |
7392 | ||
51e29401 RS |
7393 | /* If a cross reference is requested, look up the type |
7394 | already defined for this tag and return it. */ | |
7395 | ||
2f3bb934 | 7396 | ref = lookup_tag (code, name, false, &refloc); |
f18b70f5 JM |
7397 | /* If this is the right type of tag, return what we found. |
7398 | (This reference will be shadowed by shadow_tag later if appropriate.) | |
7399 | If this is the wrong type of tag, do not return it. If it was the | |
f8521984 ZW |
7400 | wrong type in the same scope, we will have had an error |
7401 | message already; if in a different scope and declaring | |
f18b70f5 | 7402 | a name, pending_xref_error will give an error message; but if in a |
f8521984 | 7403 | different scope and not declaring a name, this tag should |
f18b70f5 JM |
7404 | shadow the previous declaration of a different type of tag, and |
7405 | this would not work properly if we return the reference found. | |
7406 | (For example, with "struct foo" in an outer scope, "union foo;" | |
7407 | must shadow that tag with a new one of union type.) */ | |
81da229b | 7408 | ret.kind = (ref ? ctsk_tagref : ctsk_tagfirstref); |
f18b70f5 | 7409 | if (ref && TREE_CODE (ref) == code) |
81da229b | 7410 | { |
24b97832 ILT |
7411 | if (C_TYPE_DEFINED_IN_STRUCT (ref) |
7412 | && loc != UNKNOWN_LOCATION | |
7413 | && warn_cxx_compat) | |
7414 | { | |
7415 | switch (code) | |
7416 | { | |
7417 | case ENUMERAL_TYPE: | |
7418 | warning_at (loc, OPT_Wc___compat, | |
7419 | ("enum type defined in struct or union " | |
7420 | "is not visible in C++")); | |
7421 | inform (refloc, "enum type defined here"); | |
7422 | break; | |
7423 | case RECORD_TYPE: | |
7424 | warning_at (loc, OPT_Wc___compat, | |
7425 | ("struct defined in struct or union " | |
7426 | "is not visible in C++")); | |
7427 | inform (refloc, "struct defined here"); | |
7428 | break; | |
7429 | case UNION_TYPE: | |
7430 | warning_at (loc, OPT_Wc___compat, | |
7431 | ("union defined in struct or union " | |
7432 | "is not visible in C++")); | |
7433 | inform (refloc, "union defined here"); | |
7434 | break; | |
7435 | default: | |
7436 | gcc_unreachable(); | |
7437 | } | |
7438 | } | |
7439 | ||
81da229b JM |
7440 | ret.spec = ref; |
7441 | return ret; | |
7442 | } | |
51e29401 | 7443 | |
51e29401 RS |
7444 | /* If no such tag is yet defined, create a forward-reference node |
7445 | and record it as the "definition". | |
7446 | When a real declaration of this type is found, | |
7447 | the forward-reference will be altered into a real type. */ | |
7448 | ||
7449 | ref = make_node (code); | |
7450 | if (code == ENUMERAL_TYPE) | |
7451 | { | |
51e29401 RS |
7452 | /* Give the type a default layout like unsigned int |
7453 | to avoid crashing if it does not get defined. */ | |
179d2f74 | 7454 | SET_TYPE_MODE (ref, TYPE_MODE (unsigned_type_node)); |
fe37c7af | 7455 | SET_TYPE_ALIGN (ref, TYPE_ALIGN (unsigned_type_node)); |
11cf4d18 | 7456 | TYPE_USER_ALIGN (ref) = 0; |
8df83eae | 7457 | TYPE_UNSIGNED (ref) = 1; |
51e29401 RS |
7458 | TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node); |
7459 | TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node); | |
7460 | TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node); | |
7461 | } | |
7462 | ||
c2255bc4 | 7463 | pushtag (loc, name, ref); |
51e29401 | 7464 | |
81da229b JM |
7465 | ret.spec = ref; |
7466 | return ret; | |
7467 | } | |
7468 | ||
7469 | /* Get the struct, enum or union (CODE says which) with tag NAME. | |
7470 | Define the tag as a forward-reference if it is not defined. | |
7471 | Return a tree for the type. */ | |
7472 | ||
7473 | tree | |
7474 | xref_tag (enum tree_code code, tree name) | |
7475 | { | |
c2255bc4 | 7476 | return parser_xref_tag (input_location, code, name).spec; |
51e29401 RS |
7477 | } |
7478 | \f | |
f8521984 | 7479 | /* Make sure that the tag NAME is defined *in the current scope* |
51e29401 | 7480 | at least as a forward reference. |
c2255bc4 | 7481 | LOC is the location of the struct's definition. |
24b97832 ILT |
7482 | CODE says which kind of tag NAME ought to be. |
7483 | ||
dc491a25 ILT |
7484 | This stores the current value of the file static STRUCT_PARSE_INFO |
7485 | in *ENCLOSING_STRUCT_PARSE_INFO, and points STRUCT_PARSE_INFO at a | |
7486 | new c_struct_parse_info structure. The old value of | |
7487 | STRUCT_PARSE_INFO is restored in finish_struct. */ | |
51e29401 RS |
7488 | |
7489 | tree | |
c2255bc4 | 7490 | start_struct (location_t loc, enum tree_code code, tree name, |
dc491a25 | 7491 | struct c_struct_parse_info **enclosing_struct_parse_info) |
51e29401 | 7492 | { |
f8521984 | 7493 | /* If there is already a tag defined at this scope |
51e29401 RS |
7494 | (as a forward reference), just return it. */ |
7495 | ||
24b97832 ILT |
7496 | tree ref = NULL_TREE; |
7497 | location_t refloc = UNKNOWN_LOCATION; | |
51e29401 | 7498 | |
24b97832 | 7499 | if (name != NULL_TREE) |
2f3bb934 | 7500 | ref = lookup_tag (code, name, true, &refloc); |
51e29401 RS |
7501 | if (ref && TREE_CODE (ref) == code) |
7502 | { | |
dc949728 MP |
7503 | if (TYPE_STUB_DECL (ref)) |
7504 | refloc = DECL_SOURCE_LOCATION (TYPE_STUB_DECL (ref)); | |
7505 | ||
085e33aa | 7506 | if (TYPE_SIZE (ref)) |
c22cacf3 | 7507 | { |
53fcdc76 | 7508 | if (code == UNION_TYPE) |
24b97832 | 7509 | error_at (loc, "redefinition of %<union %E%>", name); |
c22cacf3 | 7510 | else |
24b97832 ILT |
7511 | error_at (loc, "redefinition of %<struct %E%>", name); |
7512 | if (refloc != UNKNOWN_LOCATION) | |
7513 | inform (refloc, "originally defined here"); | |
a03813c8 SE |
7514 | /* Don't create structures using a name already in use. */ |
7515 | ref = NULL_TREE; | |
35b1a6fa | 7516 | } |
085e33aa JM |
7517 | else if (C_TYPE_BEING_DEFINED (ref)) |
7518 | { | |
7519 | if (code == UNION_TYPE) | |
24b97832 | 7520 | error_at (loc, "nested redefinition of %<union %E%>", name); |
c22cacf3 | 7521 | else |
24b97832 ILT |
7522 | error_at (loc, "nested redefinition of %<struct %E%>", name); |
7523 | /* Don't bother to report "originally defined here" for a | |
7524 | nested redefinition; the original definition should be | |
7525 | obvious. */ | |
71113fcd GK |
7526 | /* Don't create structures that contain themselves. */ |
7527 | ref = NULL_TREE; | |
085e33aa | 7528 | } |
51e29401 RS |
7529 | } |
7530 | ||
71113fcd GK |
7531 | /* Otherwise create a forward-reference just so the tag is in scope. */ |
7532 | ||
7533 | if (ref == NULL_TREE || TREE_CODE (ref) != code) | |
7534 | { | |
5326cd3d | 7535 | ref = make_node (code); |
c2255bc4 | 7536 | pushtag (loc, name, ref); |
5326cd3d | 7537 | } |
35b1a6fa | 7538 | |
51e29401 | 7539 | C_TYPE_BEING_DEFINED (ref) = 1; |
a4850ce9 JH |
7540 | for (tree v = TYPE_MAIN_VARIANT (ref); v; v = TYPE_NEXT_VARIANT (v)) |
7541 | TYPE_PACKED (v) = flag_pack_struct; | |
24b97832 | 7542 | |
dc491a25 | 7543 | *enclosing_struct_parse_info = struct_parse_info; |
bf4fa671 | 7544 | struct_parse_info = new c_struct_parse_info (); |
24b97832 ILT |
7545 | |
7546 | /* FIXME: This will issue a warning for a use of a type defined | |
7547 | within a statement expr used within sizeof, et. al. This is not | |
7548 | terribly serious as C++ doesn't permit statement exprs within | |
7549 | sizeof anyhow. */ | |
7550 | if (warn_cxx_compat && (in_sizeof || in_typeof || in_alignof)) | |
7551 | warning_at (loc, OPT_Wc___compat, | |
7552 | "defining type in %qs expression is invalid in C++", | |
7553 | (in_sizeof | |
7554 | ? "sizeof" | |
7555 | : (in_typeof ? "typeof" : "alignof"))); | |
7556 | ||
51e29401 RS |
7557 | return ref; |
7558 | } | |
7559 | ||
f8893e47 | 7560 | /* Process the specs, declarator and width (NULL if omitted) |
51e29401 | 7561 | of a structure component, returning a FIELD_DECL node. |
2ff7cce4 | 7562 | WIDTH is non-NULL for bit-fields only, and is an INTEGER_CST node. |
b9baeecd | 7563 | DECL_ATTRS is as for grokdeclarator. |
51e29401 | 7564 | |
3d10ed6c AH |
7565 | LOC is the location of the structure component. |
7566 | ||
51e29401 RS |
7567 | This is done during the parsing of the struct declaration. |
7568 | The FIELD_DECL nodes are chained together and the lot of them | |
7569 | are ultimately passed to `build_struct' to make the RECORD_TYPE node. */ | |
7570 | ||
7571 | tree | |
3d10ed6c AH |
7572 | grokfield (location_t loc, |
7573 | struct c_declarator *declarator, struct c_declspecs *declspecs, | |
b9baeecd | 7574 | tree width, tree *decl_attrs) |
51e29401 RS |
7575 | { |
7576 | tree value; | |
7577 | ||
f8893e47 JM |
7578 | if (declarator->kind == cdk_id && declarator->u.id == NULL_TREE |
7579 | && width == NULL_TREE) | |
3e96a2fd | 7580 | { |
750491fc RH |
7581 | /* This is an unnamed decl. |
7582 | ||
7583 | If we have something of the form "union { list } ;" then this | |
7584 | is the anonymous union extension. Similarly for struct. | |
7585 | ||
7586 | If this is something of the form "struct foo;", then | |
478a1c5b ILT |
7587 | If MS or Plan 9 extensions are enabled, this is handled as |
7588 | an anonymous struct. | |
750491fc RH |
7589 | Otherwise this is a forward declaration of a structure tag. |
7590 | ||
7591 | If this is something of the form "foo;" and foo is a TYPE_DECL, then | |
4bdd0a60 | 7592 | If foo names a structure or union without a tag, then this |
48b0b196 | 7593 | is an anonymous struct (this is permitted by C11). |
478a1c5b ILT |
7594 | If MS or Plan 9 extensions are enabled and foo names a |
7595 | structure, then again this is an anonymous struct. | |
750491fc RH |
7596 | Otherwise this is an error. |
7597 | ||
95bd1dd7 | 7598 | Oh what a horrid tangled web we weave. I wonder if MS consciously |
750491fc RH |
7599 | took this from Plan 9 or if it was an accident of implementation |
7600 | that took root before someone noticed the bug... */ | |
7601 | ||
deb176fa | 7602 | tree type = declspecs->type; |
216a5f1b | 7603 | bool ok = false; |
85d49058 | 7604 | |
8595f67b | 7605 | if (RECORD_OR_UNION_TYPE_P (type) |
ff8e2159 JM |
7606 | && (flag_ms_extensions |
7607 | || flag_plan9_extensions | |
7608 | || !declspecs->typedef_p)) | |
750491fc | 7609 | { |
478a1c5b | 7610 | if (flag_ms_extensions || flag_plan9_extensions) |
216a5f1b | 7611 | ok = true; |
ff8e2159 | 7612 | else if (TYPE_NAME (type) == NULL) |
216a5f1b | 7613 | ok = true; |
750491fc | 7614 | else |
216a5f1b | 7615 | ok = false; |
750491fc | 7616 | } |
216a5f1b | 7617 | if (!ok) |
3e96a2fd | 7618 | { |
3d10ed6c | 7619 | pedwarn (loc, 0, "declaration does not declare anything"); |
3e96a2fd DD |
7620 | return NULL_TREE; |
7621 | } | |
35aff4fb MP |
7622 | if (flag_isoc99) |
7623 | pedwarn_c99 (loc, OPT_Wpedantic, | |
4bdd0a60 | 7624 | "ISO C99 doesn%'t support unnamed structs/unions"); |
35aff4fb MP |
7625 | else |
7626 | pedwarn_c99 (loc, OPT_Wpedantic, | |
4bdd0a60 | 7627 | "ISO C90 doesn%'t support unnamed structs/unions"); |
3e96a2fd DD |
7628 | } |
7629 | ||
60919bce | 7630 | value = grokdeclarator (declarator, declspecs, FIELD, false, |
928c19bb | 7631 | width ? &width : NULL, decl_attrs, NULL, NULL, |
b9baeecd | 7632 | DEPRECATED_NORMAL); |
51e29401 | 7633 | |
c2255bc4 | 7634 | finish_decl (value, loc, NULL_TREE, NULL_TREE, NULL_TREE); |
dfd48d76 | 7635 | DECL_INITIAL (value) = width; |
7d386d45 JJ |
7636 | if (width) |
7637 | SET_DECL_C_BIT_FIELD (value); | |
51e29401 | 7638 | |
dc491a25 ILT |
7639 | if (warn_cxx_compat && DECL_NAME (value) != NULL_TREE) |
7640 | { | |
7641 | /* If we currently have a binding for this field, set the | |
7642 | in_struct field in the binding, so that we warn about lookups | |
7643 | which find it. */ | |
7644 | struct c_binding *b = I_SYMBOL_BINDING (DECL_NAME (value)); | |
7645 | if (b != NULL) | |
7646 | { | |
7647 | /* If the in_struct field is not yet set, push it on a list | |
7648 | to be cleared when this struct is finished. */ | |
7649 | if (!b->in_struct) | |
7650 | { | |
9771b263 | 7651 | struct_parse_info->fields.safe_push (b); |
dc491a25 ILT |
7652 | b->in_struct = 1; |
7653 | } | |
7654 | } | |
7655 | } | |
7656 | ||
51e29401 RS |
7657 | return value; |
7658 | } | |
7659 | \f | |
478a1c5b ILT |
7660 | /* Subroutine of detect_field_duplicates: return whether X and Y, |
7661 | which are both fields in the same struct, have duplicate field | |
7662 | names. */ | |
7663 | ||
7664 | static bool | |
7665 | is_duplicate_field (tree x, tree y) | |
7666 | { | |
7667 | if (DECL_NAME (x) != NULL_TREE && DECL_NAME (x) == DECL_NAME (y)) | |
7668 | return true; | |
7669 | ||
7670 | /* When using -fplan9-extensions, an anonymous field whose name is a | |
7671 | typedef can duplicate a field name. */ | |
7672 | if (flag_plan9_extensions | |
7673 | && (DECL_NAME (x) == NULL_TREE || DECL_NAME (y) == NULL_TREE)) | |
7674 | { | |
7675 | tree xt, xn, yt, yn; | |
7676 | ||
7677 | xt = TREE_TYPE (x); | |
7678 | if (DECL_NAME (x) != NULL_TREE) | |
7679 | xn = DECL_NAME (x); | |
3e636daf | 7680 | else if (RECORD_OR_UNION_TYPE_P (xt) |
478a1c5b ILT |
7681 | && TYPE_NAME (xt) != NULL_TREE |
7682 | && TREE_CODE (TYPE_NAME (xt)) == TYPE_DECL) | |
7683 | xn = DECL_NAME (TYPE_NAME (xt)); | |
7684 | else | |
7685 | xn = NULL_TREE; | |
7686 | ||
7687 | yt = TREE_TYPE (y); | |
7688 | if (DECL_NAME (y) != NULL_TREE) | |
7689 | yn = DECL_NAME (y); | |
3e636daf | 7690 | else if (RECORD_OR_UNION_TYPE_P (yt) |
478a1c5b ILT |
7691 | && TYPE_NAME (yt) != NULL_TREE |
7692 | && TREE_CODE (TYPE_NAME (yt)) == TYPE_DECL) | |
7693 | yn = DECL_NAME (TYPE_NAME (yt)); | |
7694 | else | |
7695 | yn = NULL_TREE; | |
7696 | ||
7697 | if (xn != NULL_TREE && xn == yn) | |
7698 | return true; | |
7699 | } | |
7700 | ||
7701 | return false; | |
7702 | } | |
7703 | ||
492fc0ee JM |
7704 | /* Subroutine of detect_field_duplicates: add the fields of FIELDLIST |
7705 | to HTAB, giving errors for any duplicates. */ | |
7706 | ||
7707 | static void | |
703c8606 | 7708 | detect_field_duplicates_hash (tree fieldlist, |
8d67ee55 | 7709 | hash_table<nofree_ptr_hash <tree_node> > *htab) |
492fc0ee JM |
7710 | { |
7711 | tree x, y; | |
703c8606 | 7712 | tree_node **slot; |
492fc0ee | 7713 | |
910ad8de | 7714 | for (x = fieldlist; x ; x = DECL_CHAIN (x)) |
3fa8871b | 7715 | if ((y = DECL_NAME (x)) != NULL_TREE) |
492fc0ee | 7716 | { |
c203e8a7 | 7717 | slot = htab->find_slot (y, INSERT); |
492fc0ee JM |
7718 | if (*slot) |
7719 | { | |
7720 | error ("duplicate member %q+D", x); | |
7721 | DECL_NAME (x) = NULL_TREE; | |
7722 | } | |
7723 | *slot = y; | |
7724 | } | |
3e636daf | 7725 | else if (RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))) |
478a1c5b ILT |
7726 | { |
7727 | detect_field_duplicates_hash (TYPE_FIELDS (TREE_TYPE (x)), htab); | |
7728 | ||
7729 | /* When using -fplan9-extensions, an anonymous field whose | |
7730 | name is a typedef can duplicate a field name. */ | |
7731 | if (flag_plan9_extensions | |
7732 | && TYPE_NAME (TREE_TYPE (x)) != NULL_TREE | |
7733 | && TREE_CODE (TYPE_NAME (TREE_TYPE (x))) == TYPE_DECL) | |
7734 | { | |
7735 | tree xn = DECL_NAME (TYPE_NAME (TREE_TYPE (x))); | |
c203e8a7 | 7736 | slot = htab->find_slot (xn, INSERT); |
478a1c5b ILT |
7737 | if (*slot) |
7738 | error ("duplicate member %q+D", TYPE_NAME (TREE_TYPE (x))); | |
7739 | *slot = xn; | |
7740 | } | |
7741 | } | |
492fc0ee JM |
7742 | } |
7743 | ||
66ea6f4c RH |
7744 | /* Generate an error for any duplicate field names in FIELDLIST. Munge |
7745 | the list such that this does not present a problem later. */ | |
7746 | ||
7747 | static void | |
7748 | detect_field_duplicates (tree fieldlist) | |
7749 | { | |
7750 | tree x, y; | |
7751 | int timeout = 10; | |
7752 | ||
c0c24aa4 | 7753 | /* If the struct is the list of instance variables of an Objective-C |
0dc33c3c NP |
7754 | class, then we need to check all the instance variables of |
7755 | superclasses when checking for duplicates (since you can't have | |
c0c24aa4 | 7756 | an instance variable in a subclass with the same name as an |
0dc33c3c NP |
7757 | instance variable in a superclass). We pass on this job to the |
7758 | Objective-C compiler. objc_detect_field_duplicates() will return | |
7759 | false if we are not checking the list of instance variables and | |
7760 | the C frontend should proceed with the standard field duplicate | |
7761 | checks. If we are checking the list of instance variables, the | |
7762 | ObjC frontend will do the check, emit the errors if needed, and | |
7763 | then return true. */ | |
c0c24aa4 | 7764 | if (c_dialect_objc ()) |
0dc33c3c NP |
7765 | if (objc_detect_field_duplicates (false)) |
7766 | return; | |
c0c24aa4 | 7767 | |
66ea6f4c RH |
7768 | /* First, see if there are more than "a few" fields. |
7769 | This is trivially true if there are zero or one fields. */ | |
b3c1008c | 7770 | if (!fieldlist || !DECL_CHAIN (fieldlist)) |
66ea6f4c | 7771 | return; |
b3c1008c | 7772 | x = fieldlist; |
66ea6f4c RH |
7773 | do { |
7774 | timeout--; | |
492fc0ee | 7775 | if (DECL_NAME (x) == NULL_TREE |
3e636daf | 7776 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))) |
492fc0ee | 7777 | timeout = 0; |
910ad8de | 7778 | x = DECL_CHAIN (x); |
66ea6f4c RH |
7779 | } while (timeout > 0 && x); |
7780 | ||
492fc0ee JM |
7781 | /* If there were "few" fields and no anonymous structures or unions, |
7782 | avoid the overhead of allocating a hash table. Instead just do | |
7783 | the nested traversal thing. */ | |
66ea6f4c RH |
7784 | if (timeout > 0) |
7785 | { | |
f7587ed0 | 7786 | for (x = DECL_CHAIN (fieldlist); x; x = DECL_CHAIN (x)) |
478a1c5b ILT |
7787 | /* When using -fplan9-extensions, we can have duplicates |
7788 | between typedef names and fields. */ | |
7789 | if (DECL_NAME (x) | |
7790 | || (flag_plan9_extensions | |
7791 | && DECL_NAME (x) == NULL_TREE | |
3e636daf | 7792 | && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x)) |
478a1c5b ILT |
7793 | && TYPE_NAME (TREE_TYPE (x)) != NULL_TREE |
7794 | && TREE_CODE (TYPE_NAME (TREE_TYPE (x))) == TYPE_DECL)) | |
66ea6f4c RH |
7795 | { |
7796 | for (y = fieldlist; y != x; y = TREE_CHAIN (y)) | |
478a1c5b | 7797 | if (is_duplicate_field (y, x)) |
66ea6f4c | 7798 | { |
dee15844 | 7799 | error ("duplicate member %q+D", x); |
66ea6f4c RH |
7800 | DECL_NAME (x) = NULL_TREE; |
7801 | } | |
7802 | } | |
7803 | } | |
7804 | else | |
7805 | { | |
8d67ee55 | 7806 | hash_table<nofree_ptr_hash <tree_node> > htab (37); |
c203e8a7 | 7807 | detect_field_duplicates_hash (fieldlist, &htab); |
66ea6f4c RH |
7808 | } |
7809 | } | |
7810 | ||
dc491a25 ILT |
7811 | /* Finish up struct info used by -Wc++-compat. */ |
7812 | ||
7813 | static void | |
bc51ace3 PK |
7814 | warn_cxx_compat_finish_struct (tree fieldlist, enum tree_code code, |
7815 | location_t record_loc) | |
dc491a25 ILT |
7816 | { |
7817 | unsigned int ix; | |
7818 | tree x; | |
7819 | struct c_binding *b; | |
7820 | ||
bc51ace3 PK |
7821 | if (fieldlist == NULL_TREE) |
7822 | { | |
7823 | if (code == RECORD_TYPE) | |
7824 | warning_at (record_loc, OPT_Wc___compat, | |
7825 | "empty struct has size 0 in C, size 1 in C++"); | |
7826 | else | |
7827 | warning_at (record_loc, OPT_Wc___compat, | |
7828 | "empty union has size 0 in C, size 1 in C++"); | |
7829 | } | |
7830 | ||
dc491a25 ILT |
7831 | /* Set the C_TYPE_DEFINED_IN_STRUCT flag for each type defined in |
7832 | the current struct. We do this now at the end of the struct | |
7833 | because the flag is used to issue visibility warnings, and we | |
7834 | only want to issue those warnings if the type is referenced | |
7835 | outside of the struct declaration. */ | |
9771b263 | 7836 | FOR_EACH_VEC_ELT (struct_parse_info->struct_types, ix, x) |
dc491a25 ILT |
7837 | C_TYPE_DEFINED_IN_STRUCT (x) = 1; |
7838 | ||
7839 | /* The TYPEDEFS_SEEN field of STRUCT_PARSE_INFO is a list of | |
7840 | typedefs used when declaring fields in this struct. If the name | |
7841 | of any of the fields is also a typedef name then the struct would | |
7842 | not parse in C++, because the C++ lookup rules say that the | |
7843 | typedef name would be looked up in the context of the struct, and | |
7844 | would thus be the field rather than the typedef. */ | |
9771b263 | 7845 | if (!struct_parse_info->typedefs_seen.is_empty () |
dc491a25 ILT |
7846 | && fieldlist != NULL_TREE) |
7847 | { | |
6e2830c3 TS |
7848 | /* Use a hash_set<tree> using the name of the typedef. We can use |
7849 | a hash_set<tree> because identifiers are interned. */ | |
7850 | hash_set<tree> tset; | |
dc491a25 | 7851 | |
9771b263 | 7852 | FOR_EACH_VEC_ELT (struct_parse_info->typedefs_seen, ix, x) |
6e2830c3 | 7853 | tset.add (DECL_NAME (x)); |
dc491a25 | 7854 | |
910ad8de | 7855 | for (x = fieldlist; x != NULL_TREE; x = DECL_CHAIN (x)) |
dc491a25 | 7856 | { |
a75de692 | 7857 | if (DECL_NAME (x) != NULL_TREE |
6e2830c3 | 7858 | && tset.contains (DECL_NAME (x))) |
dc491a25 ILT |
7859 | { |
7860 | warning_at (DECL_SOURCE_LOCATION (x), OPT_Wc___compat, | |
7861 | ("using %qD as both field and typedef name is " | |
7862 | "invalid in C++"), | |
7863 | x); | |
7864 | /* FIXME: It would be nice to report the location where | |
7865 | the typedef name is used. */ | |
7866 | } | |
7867 | } | |
dc491a25 ILT |
7868 | } |
7869 | ||
7870 | /* For each field which has a binding and which was not defined in | |
7871 | an enclosing struct, clear the in_struct field. */ | |
9771b263 | 7872 | FOR_EACH_VEC_ELT (struct_parse_info->fields, ix, b) |
dc491a25 ILT |
7873 | b->in_struct = 0; |
7874 | } | |
7875 | ||
6836632e NS |
7876 | /* Function to help qsort sort FIELD_DECLs by name order. */ |
7877 | ||
7878 | static int | |
7879 | field_decl_cmp (const void *x_p, const void *y_p) | |
7880 | { | |
7881 | const tree *const x = (const tree *) x_p; | |
7882 | const tree *const y = (const tree *) y_p; | |
7883 | ||
7884 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
7885 | /* A nontype is "greater" than a type. */ | |
7886 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
7887 | if (DECL_NAME (*x) == NULL_TREE) | |
7888 | return -1; | |
7889 | if (DECL_NAME (*y) == NULL_TREE) | |
7890 | return 1; | |
7891 | if (DECL_NAME (*x) < DECL_NAME (*y)) | |
7892 | return -1; | |
7893 | return 1; | |
7894 | } | |
7895 | ||
51e29401 | 7896 | /* Fill in the fields of a RECORD_TYPE or UNION_TYPE node, T. |
c2255bc4 | 7897 | LOC is the location of the RECORD_TYPE or UNION_TYPE's definition. |
7a0347ff | 7898 | FIELDLIST is a chain of FIELD_DECL nodes for the fields. |
24b97832 ILT |
7899 | ATTRIBUTES are attributes to be applied to the structure. |
7900 | ||
dc491a25 ILT |
7901 | ENCLOSING_STRUCT_PARSE_INFO is the value of STRUCT_PARSE_INFO when |
7902 | the struct was started. */ | |
51e29401 RS |
7903 | |
7904 | tree | |
c2255bc4 | 7905 | finish_struct (location_t loc, tree t, tree fieldlist, tree attributes, |
dc491a25 | 7906 | struct c_struct_parse_info *enclosing_struct_parse_info) |
51e29401 | 7907 | { |
b3694847 | 7908 | tree x; |
f75fbaf7 | 7909 | bool toplevel = file_scope == current_scope; |
51e29401 RS |
7910 | |
7911 | /* If this type was previously laid out as a forward reference, | |
7912 | make sure we lay it out again. */ | |
7913 | ||
3fa8871b | 7914 | TYPE_SIZE (t) = NULL_TREE; |
51e29401 | 7915 | |
91d231cb | 7916 | decl_attributes (&t, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE); |
10861e9a | 7917 | |
9590fa72 RK |
7918 | if (pedantic) |
7919 | { | |
910ad8de | 7920 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
4bdd0a60 | 7921 | { |
3fa8871b | 7922 | if (DECL_NAME (x) != NULL_TREE) |
4bdd0a60 | 7923 | break; |
3e636daf | 7924 | if (flag_isoc11 && RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))) |
4bdd0a60 JM |
7925 | break; |
7926 | } | |
9590fa72 | 7927 | |
3fa8871b | 7928 | if (x == NULL_TREE) |
cc0b9d52 JM |
7929 | { |
7930 | if (TREE_CODE (t) == UNION_TYPE) | |
7931 | { | |
7932 | if (fieldlist) | |
c1771a20 | 7933 | pedwarn (loc, OPT_Wpedantic, "union has no named members"); |
cc0b9d52 | 7934 | else |
c1771a20 | 7935 | pedwarn (loc, OPT_Wpedantic, "union has no members"); |
cc0b9d52 JM |
7936 | } |
7937 | else | |
7938 | { | |
7939 | if (fieldlist) | |
c1771a20 | 7940 | pedwarn (loc, OPT_Wpedantic, "struct has no named members"); |
cc0b9d52 | 7941 | else |
c1771a20 | 7942 | pedwarn (loc, OPT_Wpedantic, "struct has no members"); |
cc0b9d52 JM |
7943 | } |
7944 | } | |
9590fa72 | 7945 | } |
51e29401 | 7946 | |
dfd48d76 | 7947 | /* Install struct as DECL_CONTEXT of each field decl. |
bc15d0ef JM |
7948 | Also process specified field sizes, found in the DECL_INITIAL, |
7949 | storing 0 there after the type has been changed to precision equal | |
7950 | to its width, rather than the precision of the specified standard | |
7951 | type. (Correct layout requires the original type to have been preserved | |
7952 | until now.) */ | |
51e29401 | 7953 | |
e3455240 | 7954 | bool saw_named_field = false; |
910ad8de | 7955 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
51e29401 | 7956 | { |
4271a6f3 VR |
7957 | if (TREE_TYPE (x) == error_mark_node) |
7958 | continue; | |
7959 | ||
51e29401 | 7960 | DECL_CONTEXT (x) = t; |
646c0835 | 7961 | |
51e29401 RS |
7962 | /* If any field is const, the structure type is pseudo-const. */ |
7963 | if (TREE_READONLY (x)) | |
7964 | C_TYPE_FIELDS_READONLY (t) = 1; | |
7965 | else | |
7966 | { | |
7967 | /* A field that is pseudo-const makes the structure likewise. */ | |
51f4ec66 | 7968 | tree t1 = strip_array_types (TREE_TYPE (x)); |
3e636daf | 7969 | if (RECORD_OR_UNION_TYPE_P (t1) && C_TYPE_FIELDS_READONLY (t1)) |
51e29401 RS |
7970 | C_TYPE_FIELDS_READONLY (t) = 1; |
7971 | } | |
7972 | ||
7973 | /* Any field that is volatile means variables of this type must be | |
7974 | treated in some ways as volatile. */ | |
7975 | if (TREE_THIS_VOLATILE (x)) | |
7976 | C_TYPE_FIELDS_VOLATILE (t) = 1; | |
7977 | ||
7978 | /* Any field of nominal variable size implies structure is too. */ | |
7979 | if (C_DECL_VARIABLE_SIZE (x)) | |
7980 | C_TYPE_VARIABLE_SIZE (t) = 1; | |
7981 | ||
7d386d45 | 7982 | if (DECL_C_BIT_FIELD (x)) |
dfd48d76 | 7983 | { |
ae7e9ddd | 7984 | unsigned HOST_WIDE_INT width = tree_to_uhwi (DECL_INITIAL (x)); |
2ff7cce4 JM |
7985 | DECL_SIZE (x) = bitsize_int (width); |
7986 | DECL_BIT_FIELD (x) = 1; | |
dfd48d76 NB |
7987 | } |
7988 | ||
2cd36c22 AN |
7989 | if (TYPE_PACKED (t) |
7990 | && (DECL_BIT_FIELD (x) | |
7991 | || TYPE_ALIGN (TREE_TYPE (x)) > BITS_PER_UNIT)) | |
7992 | DECL_PACKED (x) = 1; | |
7993 | ||
ffc5c6a9 RH |
7994 | /* Detect flexible array member in an invalid context. */ |
7995 | if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE | |
7996 | && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE | |
7997 | && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE | |
7998 | && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE) | |
7999 | { | |
8000 | if (TREE_CODE (t) == UNION_TYPE) | |
d915eec0 | 8001 | { |
c2255bc4 | 8002 | error_at (DECL_SOURCE_LOCATION (x), |
c5d75364 | 8003 | "flexible array member in union"); |
d915eec0 JJ |
8004 | TREE_TYPE (x) = error_mark_node; |
8005 | } | |
910ad8de | 8006 | else if (DECL_CHAIN (x) != NULL_TREE) |
d915eec0 | 8007 | { |
c2255bc4 | 8008 | error_at (DECL_SOURCE_LOCATION (x), |
c5d75364 | 8009 | "flexible array member not at end of struct"); |
d915eec0 JJ |
8010 | TREE_TYPE (x) = error_mark_node; |
8011 | } | |
3f75a254 | 8012 | else if (!saw_named_field) |
d915eec0 | 8013 | { |
c2255bc4 | 8014 | error_at (DECL_SOURCE_LOCATION (x), |
f618a472 MP |
8015 | "flexible array member in a struct with no named " |
8016 | "members"); | |
d915eec0 JJ |
8017 | TREE_TYPE (x) = error_mark_node; |
8018 | } | |
ffc5c6a9 | 8019 | } |
2984fe64 | 8020 | |
c5d75364 | 8021 | if (pedantic && TREE_CODE (t) == RECORD_TYPE |
2984fe64 | 8022 | && flexible_array_type_p (TREE_TYPE (x))) |
c1771a20 | 8023 | pedwarn (DECL_SOURCE_LOCATION (x), OPT_Wpedantic, |
c5d75364 | 8024 | "invalid use of structure with flexible array member"); |
2984fe64 | 8025 | |
4bdd0a60 | 8026 | if (DECL_NAME (x) |
3e636daf | 8027 | || RECORD_OR_UNION_TYPE_P (TREE_TYPE (x))) |
e3455240 | 8028 | saw_named_field = true; |
05bccae2 | 8029 | } |
51e29401 | 8030 | |
66ea6f4c | 8031 | detect_field_duplicates (fieldlist); |
51e29401 RS |
8032 | |
8033 | /* Now we have the nearly final fieldlist. Record it, | |
8034 | then lay out the structure or union (including the fields). */ | |
8035 | ||
8036 | TYPE_FIELDS (t) = fieldlist; | |
8037 | ||
ee45a32d EB |
8038 | maybe_apply_pragma_scalar_storage_order (t); |
8039 | ||
51e29401 RS |
8040 | layout_type (t); |
8041 | ||
26d40c3d JM |
8042 | if (TYPE_SIZE_UNIT (t) |
8043 | && TREE_CODE (TYPE_SIZE_UNIT (t)) == INTEGER_CST | |
8044 | && !TREE_OVERFLOW (TYPE_SIZE_UNIT (t)) | |
8045 | && !valid_constant_size_p (TYPE_SIZE_UNIT (t))) | |
8046 | error ("type %qT is too large", t); | |
8047 | ||
ee45a32d EB |
8048 | /* Give bit-fields their proper types and rewrite the type of array fields |
8049 | with scalar component if the enclosing type has reverse storage order. */ | |
8050 | for (tree field = fieldlist; field; field = DECL_CHAIN (field)) | |
8051 | { | |
8052 | if (TREE_CODE (field) == FIELD_DECL | |
8053 | && DECL_INITIAL (field) | |
8054 | && TREE_TYPE (field) != error_mark_node) | |
bc15d0ef JM |
8055 | { |
8056 | unsigned HOST_WIDE_INT width | |
ee45a32d EB |
8057 | = tree_to_uhwi (DECL_INITIAL (field)); |
8058 | tree type = TREE_TYPE (field); | |
bc15d0ef | 8059 | if (width != TYPE_PRECISION (type)) |
48cc8d3b | 8060 | { |
ee45a32d | 8061 | TREE_TYPE (field) |
0b359b01 | 8062 | = c_build_bitfield_integer_type (width, TYPE_UNSIGNED (type)); |
899ca90e | 8063 | SET_DECL_MODE (field, TYPE_MODE (TREE_TYPE (field))); |
48cc8d3b | 8064 | } |
3fa8871b | 8065 | DECL_INITIAL (field) = NULL_TREE; |
bc15d0ef | 8066 | } |
ee45a32d EB |
8067 | else if (TYPE_REVERSE_STORAGE_ORDER (t) |
8068 | && TREE_CODE (field) == FIELD_DECL | |
8069 | && TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE) | |
8070 | { | |
8071 | tree ftype = TREE_TYPE (field); | |
8072 | tree ctype = strip_array_types (ftype); | |
8073 | if (!RECORD_OR_UNION_TYPE_P (ctype) && TYPE_MODE (ctype) != QImode) | |
8074 | { | |
8075 | tree fmain_type = TYPE_MAIN_VARIANT (ftype); | |
8076 | tree *typep = &fmain_type; | |
8077 | do { | |
8078 | *typep = build_distinct_type_copy (*typep); | |
8079 | TYPE_REVERSE_STORAGE_ORDER (*typep) = 1; | |
8080 | typep = &TREE_TYPE (*typep); | |
8081 | } while (TREE_CODE (*typep) == ARRAY_TYPE); | |
8082 | TREE_TYPE (field) | |
8083 | = c_build_qualified_type (fmain_type, TYPE_QUALS (ftype)); | |
8084 | } | |
8085 | } | |
8086 | } | |
51e29401 | 8087 | |
ffc5c6a9 RH |
8088 | /* Now we have the truly final field list. |
8089 | Store it in this type and in the variants. */ | |
51e29401 RS |
8090 | |
8091 | TYPE_FIELDS (t) = fieldlist; | |
8092 | ||
d07605f5 | 8093 | /* If there are lots of fields, sort so we can look through them fast. |
6614fd40 | 8094 | We arbitrarily consider 16 or more elts to be "a lot". */ |
d07605f5 AP |
8095 | |
8096 | { | |
8097 | int len = 0; | |
8098 | ||
910ad8de | 8099 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
d07605f5 | 8100 | { |
c22cacf3 MS |
8101 | if (len > 15 || DECL_NAME (x) == NULL) |
8102 | break; | |
8103 | len += 1; | |
d07605f5 AP |
8104 | } |
8105 | ||
8106 | if (len > 15) | |
8107 | { | |
c22cacf3 MS |
8108 | tree *field_array; |
8109 | struct lang_type *space; | |
8110 | struct sorted_fields_type *space2; | |
e13e48e7 | 8111 | |
c22cacf3 | 8112 | len += list_length (x); |
e13e48e7 | 8113 | |
c22cacf3 MS |
8114 | /* Use the same allocation policy here that make_node uses, to |
8115 | ensure that this lives as long as the rest of the struct decl. | |
8116 | All decls in an inline function need to be saved. */ | |
e13e48e7 | 8117 | |
766090c2 TS |
8118 | space = ggc_cleared_alloc<struct lang_type> (); |
8119 | space2 = (sorted_fields_type *) ggc_internal_alloc | |
a9429e29 | 8120 | (sizeof (struct sorted_fields_type) + len * sizeof (tree)); |
e13e48e7 | 8121 | |
c22cacf3 | 8122 | len = 0; |
d07605f5 AP |
8123 | space->s = space2; |
8124 | field_array = &space2->elts[0]; | |
910ad8de | 8125 | for (x = fieldlist; x; x = DECL_CHAIN (x)) |
c22cacf3 MS |
8126 | { |
8127 | field_array[len++] = x; | |
8128 | ||
8129 | /* If there is anonymous struct or union, break out of the loop. */ | |
8130 | if (DECL_NAME (x) == NULL) | |
8131 | break; | |
8132 | } | |
8133 | /* Found no anonymous struct/union. Add the TYPE_LANG_SPECIFIC. */ | |
8134 | if (x == NULL) | |
8135 | { | |
8136 | TYPE_LANG_SPECIFIC (t) = space; | |
8137 | TYPE_LANG_SPECIFIC (t)->s->len = len; | |
8138 | field_array = TYPE_LANG_SPECIFIC (t)->s->elts; | |
8139 | qsort (field_array, len, sizeof (tree), field_decl_cmp); | |
8140 | } | |
d07605f5 AP |
8141 | } |
8142 | } | |
e13e48e7 | 8143 | |
3a5d2ba4 JJ |
8144 | /* Note: C_TYPE_INCOMPLETE_VARS overloads TYPE_VFIELD which is used |
8145 | in dwarf2out via rest_of_decl_compilation below and means | |
8146 | something totally different. Since we will be clearing | |
8147 | C_TYPE_INCOMPLETE_VARS shortly after we iterate through them, | |
8148 | clear it ahead of time and avoid problems in dwarf2out. Ideally, | |
8149 | C_TYPE_INCOMPLETE_VARS should use some language specific | |
8150 | node. */ | |
8151 | tree incomplete_vars = C_TYPE_INCOMPLETE_VARS (TYPE_MAIN_VARIANT (t)); | |
51e29401 RS |
8152 | for (x = TYPE_MAIN_VARIANT (t); x; x = TYPE_NEXT_VARIANT (x)) |
8153 | { | |
8154 | TYPE_FIELDS (x) = TYPE_FIELDS (t); | |
8155 | TYPE_LANG_SPECIFIC (x) = TYPE_LANG_SPECIFIC (t); | |
692a7aa3 JM |
8156 | C_TYPE_FIELDS_READONLY (x) = C_TYPE_FIELDS_READONLY (t); |
8157 | C_TYPE_FIELDS_VOLATILE (x) = C_TYPE_FIELDS_VOLATILE (t); | |
8158 | C_TYPE_VARIABLE_SIZE (x) = C_TYPE_VARIABLE_SIZE (t); | |
3a5d2ba4 | 8159 | C_TYPE_INCOMPLETE_VARS (x) = NULL_TREE; |
51e29401 RS |
8160 | } |
8161 | ||
1604422c RK |
8162 | /* If this was supposed to be a transparent union, but we can't |
8163 | make it one, warn and turn off the flag. */ | |
8164 | if (TREE_CODE (t) == UNION_TYPE | |
ebf0bf7f | 8165 | && TYPE_TRANSPARENT_AGGR (t) |
eb3490b9 | 8166 | && (!TYPE_FIELDS (t) || TYPE_MODE (t) != DECL_MODE (TYPE_FIELDS (t)))) |
1604422c | 8167 | { |
ebf0bf7f | 8168 | TYPE_TRANSPARENT_AGGR (t) = 0; |
c2255bc4 | 8169 | warning_at (loc, 0, "union cannot be made transparent"); |
1604422c RK |
8170 | } |
8171 | ||
51e29401 | 8172 | /* If this structure or union completes the type of any previous |
3a5d2ba4 | 8173 | variable declaration, lay it out and output its rtl. */ |
d7438551 | 8174 | for (x = incomplete_vars; x; x = TREE_CHAIN (x)) |
51e29401 | 8175 | { |
bf7a697f ZW |
8176 | tree decl = TREE_VALUE (x); |
8177 | if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
8178 | layout_array_type (TREE_TYPE (decl)); | |
8179 | if (TREE_CODE (decl) != TYPE_DECL) | |
8180 | { | |
8181 | layout_decl (decl, 0); | |
8182 | if (c_dialect_objc ()) | |
8183 | objc_check_decl (decl); | |
0e6df31e | 8184 | rest_of_decl_compilation (decl, toplevel, 0); |
51e29401 RS |
8185 | } |
8186 | } | |
8187 | ||
591a8495 JJ |
8188 | /* Update type location to the one of the definition, instead of e.g. |
8189 | a forward declaration. */ | |
8190 | if (TYPE_STUB_DECL (t)) | |
8191 | DECL_SOURCE_LOCATION (TYPE_STUB_DECL (t)) = loc; | |
8192 | ||
51e29401 RS |
8193 | /* Finish debugging output for this type. */ |
8194 | rest_of_type_compilation (t, toplevel); | |
8195 | ||
ca6af4f8 RH |
8196 | /* If we're inside a function proper, i.e. not file-scope and not still |
8197 | parsing parameters, then arrange for the size of a variable sized type | |
8198 | to be bound now. */ | |
38e01f9e | 8199 | if (building_stmt_list_p () && variably_modified_type_p (t, NULL_TREE)) |
c2255bc4 AH |
8200 | add_stmt (build_stmt (loc, |
8201 | DECL_EXPR, build_decl (loc, TYPE_DECL, NULL, t))); | |
ca6af4f8 | 8202 | |
dc491a25 | 8203 | if (warn_cxx_compat) |
bc51ace3 | 8204 | warn_cxx_compat_finish_struct (fieldlist, TREE_CODE (t), loc); |
24b97832 | 8205 | |
bf4fa671 | 8206 | delete struct_parse_info; |
24b97832 | 8207 | |
dc491a25 | 8208 | struct_parse_info = enclosing_struct_parse_info; |
24b97832 ILT |
8209 | |
8210 | /* If this struct is defined inside a struct, add it to | |
dc491a25 ILT |
8211 | struct_types. */ |
8212 | if (warn_cxx_compat | |
8213 | && struct_parse_info != NULL | |
8214 | && !in_sizeof && !in_typeof && !in_alignof) | |
9771b263 | 8215 | struct_parse_info->struct_types.safe_push (t); |
24b97832 | 8216 | |
51e29401 RS |
8217 | return t; |
8218 | } | |
8219 | ||
6836632e NS |
8220 | static struct { |
8221 | gt_pointer_operator new_value; | |
8222 | void *cookie; | |
8223 | } resort_data; | |
8224 | ||
8225 | /* This routine compares two fields like field_decl_cmp but using the | |
8226 | pointer operator in resort_data. */ | |
8227 | ||
8228 | static int | |
8229 | resort_field_decl_cmp (const void *x_p, const void *y_p) | |
8230 | { | |
8231 | const tree *const x = (const tree *) x_p; | |
8232 | const tree *const y = (const tree *) y_p; | |
8233 | ||
8234 | if (DECL_NAME (*x) == DECL_NAME (*y)) | |
8235 | /* A nontype is "greater" than a type. */ | |
8236 | return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL); | |
8237 | if (DECL_NAME (*x) == NULL_TREE) | |
8238 | return -1; | |
8239 | if (DECL_NAME (*y) == NULL_TREE) | |
8240 | return 1; | |
8241 | { | |
8242 | tree d1 = DECL_NAME (*x); | |
8243 | tree d2 = DECL_NAME (*y); | |
8244 | resort_data.new_value (&d1, resort_data.cookie); | |
8245 | resort_data.new_value (&d2, resort_data.cookie); | |
8246 | if (d1 < d2) | |
8247 | return -1; | |
8248 | } | |
8249 | return 1; | |
8250 | } | |
8251 | ||
8252 | /* Resort DECL_SORTED_FIELDS because pointers have been reordered. */ | |
8253 | ||
8254 | void | |
8255 | resort_sorted_fields (void *obj, | |
8256 | void * ARG_UNUSED (orig_obj), | |
8257 | gt_pointer_operator new_value, | |
8258 | void *cookie) | |
8259 | { | |
8260 | struct sorted_fields_type *sf = (struct sorted_fields_type *) obj; | |
8261 | resort_data.new_value = new_value; | |
8262 | resort_data.cookie = cookie; | |
8263 | qsort (&sf->elts[0], sf->len, sizeof (tree), | |
8264 | resort_field_decl_cmp); | |
8265 | } | |
8266 | ||
51e29401 RS |
8267 | /* Lay out the type T, and its element type, and so on. */ |
8268 | ||
8269 | static void | |
35b1a6fa | 8270 | layout_array_type (tree t) |
51e29401 RS |
8271 | { |
8272 | if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE) | |
8273 | layout_array_type (TREE_TYPE (t)); | |
8274 | layout_type (t); | |
8275 | } | |
8276 | \f | |
8277 | /* Begin compiling the definition of an enumeration type. | |
8278 | NAME is its name (or null if anonymous). | |
c2255bc4 | 8279 | LOC is the enum's location. |
51e29401 RS |
8280 | Returns the type object, as yet incomplete. |
8281 | Also records info about it so that build_enumerator | |
8282 | may be used to declare the individual values as they are read. */ | |
8283 | ||
8284 | tree | |
c2255bc4 | 8285 | start_enum (location_t loc, struct c_enum_contents *the_enum, tree name) |
51e29401 | 8286 | { |
24b97832 ILT |
8287 | tree enumtype = NULL_TREE; |
8288 | location_t enumloc = UNKNOWN_LOCATION; | |
51e29401 RS |
8289 | |
8290 | /* If this is the real definition for a previous forward reference, | |
8291 | fill in the contents in the same object that used to be the | |
8292 | forward reference. */ | |
8293 | ||
24b97832 | 8294 | if (name != NULL_TREE) |
2f3bb934 | 8295 | enumtype = lookup_tag (ENUMERAL_TYPE, name, true, &enumloc); |
51e29401 | 8296 | |
2f3bb934 | 8297 | if (enumtype == NULL_TREE || TREE_CODE (enumtype) != ENUMERAL_TYPE) |
51e29401 RS |
8298 | { |
8299 | enumtype = make_node (ENUMERAL_TYPE); | |
c2255bc4 | 8300 | pushtag (loc, name, enumtype); |
51e29401 | 8301 | } |
01e5af5a JJ |
8302 | /* Update type location to the one of the definition, instead of e.g. |
8303 | a forward declaration. */ | |
8304 | else if (TYPE_STUB_DECL (enumtype)) | |
dc949728 MP |
8305 | { |
8306 | enumloc = DECL_SOURCE_LOCATION (TYPE_STUB_DECL (enumtype)); | |
8307 | DECL_SOURCE_LOCATION (TYPE_STUB_DECL (enumtype)) = loc; | |
8308 | } | |
51e29401 | 8309 | |
085e33aa | 8310 | if (C_TYPE_BEING_DEFINED (enumtype)) |
24b97832 | 8311 | error_at (loc, "nested redefinition of %<enum %E%>", name); |
085e33aa | 8312 | |
51e29401 RS |
8313 | C_TYPE_BEING_DEFINED (enumtype) = 1; |
8314 | ||
3fa8871b | 8315 | if (TYPE_VALUES (enumtype) != NULL_TREE) |
51e29401 RS |
8316 | { |
8317 | /* This enum is a named one that has been declared already. */ | |
24b97832 ILT |
8318 | error_at (loc, "redeclaration of %<enum %E%>", name); |
8319 | if (enumloc != UNKNOWN_LOCATION) | |
8320 | inform (enumloc, "originally defined here"); | |
51e29401 RS |
8321 | |
8322 | /* Completely replace its old definition. | |
8323 | The old enumerators remain defined, however. */ | |
3fa8871b | 8324 | TYPE_VALUES (enumtype) = NULL_TREE; |
51e29401 RS |
8325 | } |
8326 | ||
7114359f TT |
8327 | the_enum->enum_next_value = integer_zero_node; |
8328 | the_enum->enum_overflow = 0; | |
51e29401 | 8329 | |
02eb6e90 | 8330 | if (flag_short_enums) |
8cbababc JH |
8331 | for (tree v = TYPE_MAIN_VARIANT (enumtype); v; v = TYPE_NEXT_VARIANT (v)) |
8332 | TYPE_PACKED (v) = 1; | |
02eb6e90 | 8333 | |
24b97832 ILT |
8334 | /* FIXME: This will issue a warning for a use of a type defined |
8335 | within sizeof in a statement expr. This is not terribly serious | |
8336 | as C++ doesn't permit statement exprs within sizeof anyhow. */ | |
8337 | if (warn_cxx_compat && (in_sizeof || in_typeof || in_alignof)) | |
8338 | warning_at (loc, OPT_Wc___compat, | |
8339 | "defining type in %qs expression is invalid in C++", | |
8340 | (in_sizeof | |
8341 | ? "sizeof" | |
8342 | : (in_typeof ? "typeof" : "alignof"))); | |
8343 | ||
51e29401 RS |
8344 | return enumtype; |
8345 | } | |
8346 | ||
8347 | /* After processing and defining all the values of an enumeration type, | |
8348 | install their decls in the enumeration type and finish it off. | |
10861e9a RK |
8349 | ENUMTYPE is the type object, VALUES a list of decl-value pairs, |
8350 | and ATTRIBUTES are the specified attributes. | |
51e29401 RS |
8351 | Returns ENUMTYPE. */ |
8352 | ||
8353 | tree | |
35b1a6fa | 8354 | finish_enum (tree enumtype, tree values, tree attributes) |
51e29401 | 8355 | { |
b3694847 | 8356 | tree pair, tem; |
3fa8871b | 8357 | tree minnode = NULL_TREE, maxnode = NULL_TREE; |
807e902e KZ |
8358 | int precision; |
8359 | signop sign; | |
f75fbaf7 | 8360 | bool toplevel = (file_scope == current_scope); |
6de9cd9a | 8361 | struct lang_type *lt; |
51e29401 | 8362 | |
91d231cb | 8363 | decl_attributes (&enumtype, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE); |
10861e9a | 8364 | |
51e29401 RS |
8365 | /* Calculate the maximum value of any enumerator in this type. */ |
8366 | ||
59116212 RK |
8367 | if (values == error_mark_node) |
8368 | minnode = maxnode = integer_zero_node; | |
8369 | else | |
f500253d | 8370 | { |
cb3ca04e ZW |
8371 | minnode = maxnode = TREE_VALUE (values); |
8372 | for (pair = TREE_CHAIN (values); pair; pair = TREE_CHAIN (pair)) | |
f500253d | 8373 | { |
cb3ca04e ZW |
8374 | tree value = TREE_VALUE (pair); |
8375 | if (tree_int_cst_lt (maxnode, value)) | |
8376 | maxnode = value; | |
8377 | if (tree_int_cst_lt (value, minnode)) | |
8378 | minnode = value; | |
f500253d | 8379 | } |
cb3ca04e | 8380 | } |
f500253d | 8381 | |
cb3ca04e ZW |
8382 | /* Construct the final type of this enumeration. It is the same |
8383 | as one of the integral types - the narrowest one that fits, except | |
8384 | that normally we only go as narrow as int - and signed iff any of | |
8385 | the values are negative. */ | |
807e902e KZ |
8386 | sign = (tree_int_cst_sgn (minnode) >= 0) ? UNSIGNED : SIGNED; |
8387 | precision = MAX (tree_int_cst_min_precision (minnode, sign), | |
8388 | tree_int_cst_min_precision (maxnode, sign)); | |
ec8465a5 | 8389 | |
1066e9b5 JJ |
8390 | /* If the precision of the type was specified with an attribute and it |
8391 | was too small, give an error. Otherwise, use it. */ | |
8392 | if (TYPE_PRECISION (enumtype) && lookup_attribute ("mode", attributes)) | |
8393 | { | |
8394 | if (precision > TYPE_PRECISION (enumtype)) | |
8395 | { | |
8396 | TYPE_PRECISION (enumtype) = 0; | |
8397 | error ("specified mode too small for enumeral values"); | |
8398 | } | |
8399 | else | |
8400 | precision = TYPE_PRECISION (enumtype); | |
8401 | } | |
8402 | else | |
8403 | TYPE_PRECISION (enumtype) = 0; | |
8404 | ||
8405 | if (TYPE_PACKED (enumtype) | |
8406 | || precision > TYPE_PRECISION (integer_type_node) | |
8407 | || TYPE_PRECISION (enumtype)) | |
cb3ca04e | 8408 | { |
807e902e | 8409 | tem = c_common_type_for_size (precision, sign == UNSIGNED ? 1 : 0); |
6de9cd9a | 8410 | if (tem == NULL) |
1ada4cd0 | 8411 | { |
d4ee4d25 | 8412 | warning (0, "enumeration values exceed range of largest integer"); |
6de9cd9a | 8413 | tem = long_long_integer_type_node; |
1ada4cd0 | 8414 | } |
f500253d | 8415 | } |
1ada4cd0 | 8416 | else |
807e902e | 8417 | tem = sign == UNSIGNED ? unsigned_type_node : integer_type_node; |
736f85c7 | 8418 | |
6de9cd9a DN |
8419 | TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (tem); |
8420 | TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (tem); | |
6de9cd9a | 8421 | TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (tem); |
fe37c7af | 8422 | SET_TYPE_ALIGN (enumtype, TYPE_ALIGN (tem)); |
3fa8871b | 8423 | TYPE_SIZE (enumtype) = NULL_TREE; |
1066e9b5 | 8424 | TYPE_PRECISION (enumtype) = TYPE_PRECISION (tem); |
ec8465a5 | 8425 | |
51e29401 RS |
8426 | layout_type (enumtype); |
8427 | ||
59116212 | 8428 | if (values != error_mark_node) |
75b46437 | 8429 | { |
cb3ca04e ZW |
8430 | /* Change the type of the enumerators to be the enum type. We |
8431 | need to do this irrespective of the size of the enum, for | |
8432 | proper type checking. Replace the DECL_INITIALs of the | |
8433 | enumerators, and the value slots of the list, with copies | |
8434 | that have the enum type; they cannot be modified in place | |
8435 | because they may be shared (e.g. integer_zero_node) Finally, | |
8436 | change the purpose slots to point to the names of the decls. */ | |
59116212 RK |
8437 | for (pair = values; pair; pair = TREE_CHAIN (pair)) |
8438 | { | |
cb3ca04e | 8439 | tree enu = TREE_PURPOSE (pair); |
6de9cd9a | 8440 | tree ini = DECL_INITIAL (enu); |
51e29401 | 8441 | |
cb3ca04e | 8442 | TREE_TYPE (enu) = enumtype; |
736f85c7 AO |
8443 | |
8444 | /* The ISO C Standard mandates enumerators to have type int, | |
8445 | even though the underlying type of an enum type is | |
85790e66 | 8446 | unspecified. However, GCC allows enumerators of any |
a7e72022 MLI |
8447 | integer type as an extensions. build_enumerator() |
8448 | converts any enumerators that fit in an int to type int, | |
8449 | to avoid promotions to unsigned types when comparing | |
8450 | integers with enumerators that fit in the int range. | |
8451 | When -pedantic is given, build_enumerator() would have | |
8452 | already warned about those that don't fit. Here we | |
8453 | convert the rest to the enumerator type. */ | |
8454 | if (TREE_TYPE (ini) != integer_type_node) | |
8455 | ini = convert (enumtype, ini); | |
cb3ca04e | 8456 | |
6de9cd9a | 8457 | DECL_INITIAL (enu) = ini; |
cb3ca04e | 8458 | TREE_PURPOSE (pair) = DECL_NAME (enu); |
6de9cd9a | 8459 | TREE_VALUE (pair) = ini; |
cb3ca04e | 8460 | } |
51e29401 | 8461 | |
59116212 RK |
8462 | TYPE_VALUES (enumtype) = values; |
8463 | } | |
51e29401 | 8464 | |
6de9cd9a DN |
8465 | /* Record the min/max values so that we can warn about bit-field |
8466 | enumerations that are too small for the values. */ | |
766090c2 | 8467 | lt = ggc_cleared_alloc<struct lang_type> (); |
6de9cd9a DN |
8468 | lt->enum_min = minnode; |
8469 | lt->enum_max = maxnode; | |
8470 | TYPE_LANG_SPECIFIC (enumtype) = lt; | |
8471 | ||
fbe23ee7 RS |
8472 | /* Fix up all variant types of this enum type. */ |
8473 | for (tem = TYPE_MAIN_VARIANT (enumtype); tem; tem = TYPE_NEXT_VARIANT (tem)) | |
8474 | { | |
cb3ca04e ZW |
8475 | if (tem == enumtype) |
8476 | continue; | |
fbe23ee7 RS |
8477 | TYPE_VALUES (tem) = TYPE_VALUES (enumtype); |
8478 | TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype); | |
8479 | TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype); | |
8480 | TYPE_SIZE (tem) = TYPE_SIZE (enumtype); | |
def9b006 | 8481 | TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype); |
179d2f74 | 8482 | SET_TYPE_MODE (tem, TYPE_MODE (enumtype)); |
fbe23ee7 | 8483 | TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype); |
fe37c7af | 8484 | SET_TYPE_ALIGN (tem, TYPE_ALIGN (enumtype)); |
11cf4d18 | 8485 | TYPE_USER_ALIGN (tem) = TYPE_USER_ALIGN (enumtype); |
8df83eae | 8486 | TYPE_UNSIGNED (tem) = TYPE_UNSIGNED (enumtype); |
6de9cd9a | 8487 | TYPE_LANG_SPECIFIC (tem) = TYPE_LANG_SPECIFIC (enumtype); |
fbe23ee7 RS |
8488 | } |
8489 | ||
51e29401 RS |
8490 | /* Finish debugging output for this type. */ |
8491 | rest_of_type_compilation (enumtype, toplevel); | |
8492 | ||
24b97832 | 8493 | /* If this enum is defined inside a struct, add it to |
dc491a25 ILT |
8494 | struct_types. */ |
8495 | if (warn_cxx_compat | |
8496 | && struct_parse_info != NULL | |
8497 | && !in_sizeof && !in_typeof && !in_alignof) | |
9771b263 | 8498 | struct_parse_info->struct_types.safe_push (enumtype); |
24b97832 | 8499 | |
51e29401 RS |
8500 | return enumtype; |
8501 | } | |
8502 | ||
8503 | /* Build and install a CONST_DECL for one value of the | |
8504 | current enumeration type (one that was begun with start_enum). | |
7370e0da AC |
8505 | DECL_LOC is the location of the enumerator. |
8506 | LOC is the location of the '=' operator if any, DECL_LOC otherwise. | |
51e29401 RS |
8507 | Return a tree-list containing the CONST_DECL and its value. |
8508 | Assignment of sequential values by default is handled here. */ | |
8509 | ||
8510 | tree | |
7370e0da | 8511 | build_enumerator (location_t decl_loc, location_t loc, |
c2255bc4 | 8512 | struct c_enum_contents *the_enum, tree name, tree value) |
51e29401 | 8513 | { |
b3694847 | 8514 | tree decl, type; |
51e29401 RS |
8515 | |
8516 | /* Validate and default VALUE. */ | |
8517 | ||
3fa8871b | 8518 | if (value != NULL_TREE) |
e681c5a1 | 8519 | { |
f75fbaf7 ZW |
8520 | /* Don't issue more errors for error_mark_node (i.e. an |
8521 | undeclared identifier) - just ignore the value expression. */ | |
8522 | if (value == error_mark_node) | |
3fa8871b | 8523 | value = NULL_TREE; |
6895bac8 | 8524 | else if (!INTEGRAL_TYPE_P (TREE_TYPE (value))) |
25a1019f | 8525 | { |
c2255bc4 AH |
8526 | error_at (loc, "enumerator value for %qE is not an integer constant", |
8527 | name); | |
3fa8871b | 8528 | value = NULL_TREE; |
25a1019f | 8529 | } |
e681c5a1 RS |
8530 | else |
8531 | { | |
6895bac8 JM |
8532 | if (TREE_CODE (value) != INTEGER_CST) |
8533 | { | |
8534 | value = c_fully_fold (value, false, NULL); | |
8535 | if (TREE_CODE (value) == INTEGER_CST) | |
c1771a20 | 8536 | pedwarn (loc, OPT_Wpedantic, |
6895bac8 JM |
8537 | "enumerator value for %qE is not an integer " |
8538 | "constant expression", name); | |
8539 | } | |
8540 | if (TREE_CODE (value) != INTEGER_CST) | |
8541 | { | |
8542 | error ("enumerator value for %qE is not an integer constant", | |
8543 | name); | |
3fa8871b | 8544 | value = NULL_TREE; |
6895bac8 JM |
8545 | } |
8546 | else | |
8547 | { | |
8548 | value = default_conversion (value); | |
8549 | constant_expression_warning (value); | |
8550 | } | |
e681c5a1 RS |
8551 | } |
8552 | } | |
51e29401 RS |
8553 | |
8554 | /* Default based on previous value. */ | |
8555 | /* It should no longer be possible to have NON_LVALUE_EXPR | |
8556 | in the default. */ | |
3fa8871b | 8557 | if (value == NULL_TREE) |
93e3ba4f | 8558 | { |
7114359f TT |
8559 | value = the_enum->enum_next_value; |
8560 | if (the_enum->enum_overflow) | |
c2255bc4 | 8561 | error_at (loc, "overflow in enumeration values"); |
93e3ba4f | 8562 | } |
85790e66 MLI |
8563 | /* Even though the underlying type of an enum is unspecified, the |
8564 | type of enumeration constants is explicitly defined as int | |
8565 | (6.4.4.3/2 in the C99 Standard). GCC allows any integer type as | |
8566 | an extension. */ | |
8567 | else if (!int_fits_type_p (value, integer_type_node)) | |
c1771a20 | 8568 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 8569 | "ISO C restricts enumerator values to range of %<int%>"); |
51e29401 | 8570 | |
a7e72022 MLI |
8571 | /* The ISO C Standard mandates enumerators to have type int, even |
8572 | though the underlying type of an enum type is unspecified. | |
8573 | However, GCC allows enumerators of any integer type as an | |
8574 | extensions. Here we convert any enumerators that fit in an int | |
8575 | to type int, to avoid promotions to unsigned types when comparing | |
8576 | integers with enumerators that fit in the int range. When | |
8577 | -pedantic is given, we would have already warned about those that | |
8578 | don't fit. We have to do this here rather than in finish_enum | |
8579 | because this value may be used to define more enumerators. */ | |
8580 | if (int_fits_type_p (value, integer_type_node)) | |
8581 | value = convert (integer_type_node, value); | |
8582 | ||
51e29401 | 8583 | /* Set basis for default for next value. */ |
ba47d38d | 8584 | the_enum->enum_next_value |
8400e75e | 8585 | = build_binary_op (EXPR_LOC_OR_LOC (value, input_location), |
30af3a2b | 8586 | PLUS_EXPR, value, integer_one_node, false); |
7114359f | 8587 | the_enum->enum_overflow = tree_int_cst_lt (the_enum->enum_next_value, value); |
51e29401 RS |
8588 | |
8589 | /* Now create a declaration for the enum value name. */ | |
8590 | ||
75b46437 | 8591 | type = TREE_TYPE (value); |
b0c48229 NB |
8592 | type = c_common_type_for_size (MAX (TYPE_PRECISION (type), |
8593 | TYPE_PRECISION (integer_type_node)), | |
8594 | (TYPE_PRECISION (type) | |
8595 | >= TYPE_PRECISION (integer_type_node) | |
8df83eae | 8596 | && TYPE_UNSIGNED (type))); |
75b46437 | 8597 | |
7370e0da | 8598 | decl = build_decl (decl_loc, CONST_DECL, name, type); |
0543d026 | 8599 | DECL_INITIAL (decl) = convert (type, value); |
51e29401 RS |
8600 | pushdecl (decl); |
8601 | ||
4dd7201e | 8602 | return tree_cons (decl, value, NULL_TREE); |
51e29401 | 8603 | } |
8f17b5c5 | 8604 | |
51e29401 RS |
8605 | \f |
8606 | /* Create the FUNCTION_DECL for a function definition. | |
f7a4cec0 | 8607 | DECLSPECS, DECLARATOR and ATTRIBUTES are the parts of |
5730cf69 | 8608 | the declaration; they describe the function's name and the type it returns, |
51e29401 RS |
8609 | but twisted together in a fashion that parallels the syntax of C. |
8610 | ||
8611 | This function creates a binding context for the function body | |
8612 | as well as setting up the FUNCTION_DECL in current_function_decl. | |
8613 | ||
e3455240 MP |
8614 | Returns true on success. If the DECLARATOR is not suitable for a function |
8615 | (it defines a datum instead), we return false to report a parse error. */ | |
51e29401 | 8616 | |
e3455240 | 8617 | bool |
deb176fa | 8618 | start_function (struct c_declspecs *declspecs, struct c_declarator *declarator, |
f8893e47 | 8619 | tree attributes) |
51e29401 RS |
8620 | { |
8621 | tree decl1, old_decl; | |
b785f485 | 8622 | tree restype, resdecl; |
c2255bc4 | 8623 | location_t loc; |
51e29401 | 8624 | |
0f41302f | 8625 | current_function_returns_value = 0; /* Assume, until we see it does. */ |
51e29401 | 8626 | current_function_returns_null = 0; |
5ce89b2e | 8627 | current_function_returns_abnormally = 0; |
51e29401 | 8628 | warn_about_return_type = 0; |
506e2710 RH |
8629 | c_switch_stack = NULL; |
8630 | ||
8631 | /* Indicate no valid break/continue context by setting these variables | |
8632 | to some non-null, non-label value. We'll notice and emit the proper | |
8633 | error message in c_finish_bc_stmt. */ | |
8634 | c_break_label = c_cont_label = size_zero_node; | |
51e29401 | 8635 | |
0da300cd | 8636 | decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, true, NULL, |
928c19bb | 8637 | &attributes, NULL, NULL, DEPRECATED_NORMAL); |
ea5b45b6 | 8638 | invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION, decl1); |
51e29401 RS |
8639 | |
8640 | /* If the declarator is not suitable for a function definition, | |
8641 | cause a syntax error. */ | |
3fa8871b | 8642 | if (decl1 == NULL_TREE |
560ad308 | 8643 | || TREE_CODE (decl1) != FUNCTION_DECL) |
e3455240 | 8644 | return false; |
51e29401 | 8645 | |
c2255bc4 AH |
8646 | loc = DECL_SOURCE_LOCATION (decl1); |
8647 | ||
acf0174b | 8648 | c_decl_attributes (&decl1, attributes, 0); |
7665dfd4 | 8649 | |
9162542e AO |
8650 | if (DECL_DECLARED_INLINE_P (decl1) |
8651 | && DECL_UNINLINABLE (decl1) | |
8652 | && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl1))) | |
c2255bc4 AH |
8653 | warning_at (loc, OPT_Wattributes, |
8654 | "inline function %qD given attribute noinline", | |
8655 | decl1); | |
9162542e | 8656 | |
4eb7fd83 JJ |
8657 | /* Handle gnu_inline attribute. */ |
8658 | if (declspecs->inline_p | |
da1c7394 | 8659 | && !flag_gnu89_inline |
4eb7fd83 | 8660 | && TREE_CODE (decl1) == FUNCTION_DECL |
6cf59865 JJ |
8661 | && (lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (decl1)) |
8662 | || current_function_decl)) | |
4eb7fd83 JJ |
8663 | { |
8664 | if (declspecs->storage_class != csc_static) | |
8665 | DECL_EXTERNAL (decl1) = !DECL_EXTERNAL (decl1); | |
8666 | } | |
4eb7fd83 | 8667 | |
51e29401 RS |
8668 | announce_function (decl1); |
8669 | ||
d0f062fb | 8670 | if (!COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (TREE_TYPE (decl1)))) |
51e29401 | 8671 | { |
c2255bc4 | 8672 | error_at (loc, "return type is an incomplete type"); |
51e29401 RS |
8673 | /* Make it return void instead. */ |
8674 | TREE_TYPE (decl1) | |
8675 | = build_function_type (void_type_node, | |
8676 | TYPE_ARG_TYPES (TREE_TYPE (decl1))); | |
8677 | } | |
8678 | ||
8679 | if (warn_about_return_type) | |
92574c7c | 8680 | warn_defaults_to (loc, flag_isoc99 ? OPT_Wimplicit_int |
35aff4fb MP |
8681 | : (warn_return_type ? OPT_Wreturn_type |
8682 | : OPT_Wimplicit_int), | |
8683 | "return type defaults to %<int%>"); | |
51e29401 | 8684 | |
51e29401 | 8685 | /* Make the init_value nonzero so pushdecl knows this is not tentative. |
f75fbaf7 | 8686 | error_mark_node is replaced below (in pop_scope) with the BLOCK. */ |
51e29401 RS |
8687 | DECL_INITIAL (decl1) = error_mark_node; |
8688 | ||
c4712597 | 8689 | /* A nested function is not global. */ |
3fa8871b | 8690 | if (current_function_decl != NULL_TREE) |
c4712597 SZ |
8691 | TREE_PUBLIC (decl1) = 0; |
8692 | ||
51e29401 | 8693 | /* If this definition isn't a prototype and we had a prototype declaration |
46097c76 | 8694 | before, copy the arg type info from that prototype. */ |
f75fbaf7 | 8695 | old_decl = lookup_name_in_scope (DECL_NAME (decl1), current_scope); |
d8890adf | 8696 | if (old_decl && TREE_CODE (old_decl) != FUNCTION_DECL) |
3fa8871b | 8697 | old_decl = NULL_TREE; |
6fb58bba JM |
8698 | current_function_prototype_locus = UNKNOWN_LOCATION; |
8699 | current_function_prototype_built_in = false; | |
8700 | current_function_prototype_arg_types = NULL_TREE; | |
f4da8dce | 8701 | if (!prototype_p (TREE_TYPE (decl1))) |
6fb58bba | 8702 | { |
3fa8871b MP |
8703 | if (old_decl != NULL_TREE |
8704 | && TREE_CODE (TREE_TYPE (old_decl)) == FUNCTION_TYPE | |
6fb58bba JM |
8705 | && comptypes (TREE_TYPE (TREE_TYPE (decl1)), |
8706 | TREE_TYPE (TREE_TYPE (old_decl)))) | |
8707 | { | |
e9122ef6 MP |
8708 | if (stdarg_p (TREE_TYPE (old_decl))) |
8709 | { | |
8710 | warning_at (loc, 0, "%q+D defined as variadic function " | |
8711 | "without prototype", decl1); | |
8712 | locate_old_decl (old_decl); | |
8713 | } | |
6fb58bba JM |
8714 | TREE_TYPE (decl1) = composite_type (TREE_TYPE (old_decl), |
8715 | TREE_TYPE (decl1)); | |
8716 | current_function_prototype_locus = DECL_SOURCE_LOCATION (old_decl); | |
8717 | current_function_prototype_built_in | |
8718 | = C_DECL_BUILTIN_PROTOTYPE (old_decl); | |
8719 | current_function_prototype_arg_types | |
8720 | = TYPE_ARG_TYPES (TREE_TYPE (decl1)); | |
8721 | } | |
8722 | if (TREE_PUBLIC (decl1)) | |
8723 | { | |
8724 | /* If there is an external prototype declaration of this | |
8725 | function, record its location but do not copy information | |
8726 | to this decl. This may be an invisible declaration | |
8727 | (built-in or in a scope which has finished) or simply | |
8728 | have more refined argument types than any declaration | |
8729 | found above. */ | |
8730 | struct c_binding *b; | |
8731 | for (b = I_SYMBOL_BINDING (DECL_NAME (decl1)); b; b = b->shadowed) | |
8732 | if (B_IN_SCOPE (b, external_scope)) | |
8733 | break; | |
8734 | if (b) | |
8735 | { | |
8736 | tree ext_decl, ext_type; | |
8737 | ext_decl = b->decl; | |
e1b7793c | 8738 | ext_type = b->u.type ? b->u.type : TREE_TYPE (ext_decl); |
6fb58bba JM |
8739 | if (TREE_CODE (ext_type) == FUNCTION_TYPE |
8740 | && comptypes (TREE_TYPE (TREE_TYPE (decl1)), | |
8741 | TREE_TYPE (ext_type))) | |
8742 | { | |
8743 | current_function_prototype_locus | |
8744 | = DECL_SOURCE_LOCATION (ext_decl); | |
8745 | current_function_prototype_built_in | |
8746 | = C_DECL_BUILTIN_PROTOTYPE (ext_decl); | |
8747 | current_function_prototype_arg_types | |
8748 | = TYPE_ARG_TYPES (ext_type); | |
8749 | } | |
8750 | } | |
8751 | } | |
50a9145c | 8752 | } |
51e29401 RS |
8753 | |
8754 | /* Optionally warn of old-fashioned def with no previous prototype. */ | |
8755 | if (warn_strict_prototypes | |
1e55c0e2 | 8756 | && old_decl != error_mark_node |
f4da8dce | 8757 | && !prototype_p (TREE_TYPE (decl1)) |
339a28b9 | 8758 | && C_DECL_ISNT_PROTOTYPE (old_decl)) |
c2255bc4 AH |
8759 | warning_at (loc, OPT_Wstrict_prototypes, |
8760 | "function declaration isn%'t a prototype"); | |
51e29401 RS |
8761 | /* Optionally warn of any global def with no previous prototype. */ |
8762 | else if (warn_missing_prototypes | |
1e55c0e2 | 8763 | && old_decl != error_mark_node |
51e29401 | 8764 | && TREE_PUBLIC (decl1) |
3f75a254 | 8765 | && !MAIN_NAME_P (DECL_NAME (decl1)) |
edd28054 MP |
8766 | && C_DECL_ISNT_PROTOTYPE (old_decl) |
8767 | && !DECL_DECLARED_INLINE_P (decl1)) | |
c2255bc4 AH |
8768 | warning_at (loc, OPT_Wmissing_prototypes, |
8769 | "no previous prototype for %qD", decl1); | |
51e29401 RS |
8770 | /* Optionally warn of any def with no previous prototype |
8771 | if the function has already been used. */ | |
8772 | else if (warn_missing_prototypes | |
3fa8871b | 8773 | && old_decl != NULL_TREE |
1e55c0e2 JM |
8774 | && old_decl != error_mark_node |
8775 | && TREE_USED (old_decl) | |
f4da8dce | 8776 | && !prototype_p (TREE_TYPE (old_decl))) |
c2255bc4 AH |
8777 | warning_at (loc, OPT_Wmissing_prototypes, |
8778 | "%qD was used with no prototype before its definition", decl1); | |
1474fe46 RK |
8779 | /* Optionally warn of any global def with no previous declaration. */ |
8780 | else if (warn_missing_declarations | |
8781 | && TREE_PUBLIC (decl1) | |
3fa8871b | 8782 | && old_decl == NULL_TREE |
b286be94 MP |
8783 | && !MAIN_NAME_P (DECL_NAME (decl1)) |
8784 | && !DECL_DECLARED_INLINE_P (decl1)) | |
c2255bc4 AH |
8785 | warning_at (loc, OPT_Wmissing_declarations, |
8786 | "no previous declaration for %qD", | |
8787 | decl1); | |
1474fe46 RK |
8788 | /* Optionally warn of any def with no previous declaration |
8789 | if the function has already been used. */ | |
8790 | else if (warn_missing_declarations | |
3fa8871b | 8791 | && old_decl != NULL_TREE |
1e55c0e2 JM |
8792 | && old_decl != error_mark_node |
8793 | && TREE_USED (old_decl) | |
339a28b9 | 8794 | && C_DECL_IMPLICIT (old_decl)) |
c2255bc4 AH |
8795 | warning_at (loc, OPT_Wmissing_declarations, |
8796 | "%qD was used with no declaration before its definition", decl1); | |
51e29401 | 8797 | |
51e29401 RS |
8798 | /* This function exists in static storage. |
8799 | (This does not mean `static' in the C sense!) */ | |
8800 | TREE_STATIC (decl1) = 1; | |
8801 | ||
d05cc98e GK |
8802 | /* This is the earliest point at which we might know the assembler |
8803 | name of the function. Thus, if it's set before this, die horribly. */ | |
366de0ce | 8804 | gcc_assert (!DECL_ASSEMBLER_NAME_SET_P (decl1)); |
d05cc98e GK |
8805 | |
8806 | /* If #pragma weak was used, mark the decl weak now. */ | |
f75fbaf7 | 8807 | if (current_scope == file_scope) |
d05cc98e GK |
8808 | maybe_apply_pragma_weak (decl1); |
8809 | ||
6645c3fa | 8810 | /* Warn for unlikely, improbable, or stupid declarations of `main'. */ |
4003301d | 8811 | if (warn_main && MAIN_NAME_P (DECL_NAME (decl1))) |
b8705e61 | 8812 | { |
b8705e61 | 8813 | if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (decl1))) |
6645c3fa | 8814 | != integer_type_node) |
c2255bc4 | 8815 | pedwarn (loc, OPT_Wmain, "return type of %qD is not %<int%>", decl1); |
f827930a MP |
8816 | else if (TYPE_ATOMIC (TREE_TYPE (TREE_TYPE (decl1)))) |
8817 | pedwarn (loc, OPT_Wmain, "%<_Atomic%>-qualified return type of %qD", | |
8818 | decl1); | |
b8705e61 | 8819 | |
4003301d | 8820 | check_main_parameter_types (decl1); |
b8705e61 | 8821 | |
3f75a254 | 8822 | if (!TREE_PUBLIC (decl1)) |
c2255bc4 AH |
8823 | pedwarn (loc, OPT_Wmain, |
8824 | "%qD is normally a non-static function", decl1); | |
b8705e61 RK |
8825 | } |
8826 | ||
51e29401 RS |
8827 | /* Record the decl so that the function name is defined. |
8828 | If we already have a decl for this name, and it is a FUNCTION_DECL, | |
8829 | use the old decl. */ | |
8830 | ||
8831 | current_function_decl = pushdecl (decl1); | |
8832 | ||
f75fbaf7 | 8833 | push_scope (); |
eb1dfbb2 | 8834 | declare_parm_level (); |
51e29401 | 8835 | |
51e29401 | 8836 | restype = TREE_TYPE (TREE_TYPE (current_function_decl)); |
c2255bc4 | 8837 | resdecl = build_decl (loc, RESULT_DECL, NULL_TREE, restype); |
b785f485 RH |
8838 | DECL_ARTIFICIAL (resdecl) = 1; |
8839 | DECL_IGNORED_P (resdecl) = 1; | |
8840 | DECL_RESULT (current_function_decl) = resdecl; | |
51e29401 | 8841 | |
0ba8a114 | 8842 | start_fname_decls (); |
35b1a6fa | 8843 | |
e3455240 | 8844 | return true; |
51e29401 | 8845 | } |
51e29401 | 8846 | \f |
66db6b62 ZW |
8847 | /* Subroutine of store_parm_decls which handles new-style function |
8848 | definitions (prototype format). The parms already have decls, so we | |
8849 | need only record them as in effect and complain if any redundant | |
8850 | old-style parm decls were written. */ | |
d4e43dff | 8851 | static void |
f8893e47 | 8852 | store_parm_decls_newstyle (tree fndecl, const struct c_arg_info *arg_info) |
51e29401 | 8853 | { |
f75fbaf7 | 8854 | tree decl; |
e60bf9d4 NF |
8855 | c_arg_tag *tag; |
8856 | unsigned ix; | |
51e29401 | 8857 | |
f75fbaf7 | 8858 | if (current_scope->bindings) |
66db6b62 | 8859 | { |
c5d75364 MLI |
8860 | error_at (DECL_SOURCE_LOCATION (fndecl), |
8861 | "old-style parameter declarations in prototyped " | |
8862 | "function definition"); | |
51e29401 | 8863 | |
66db6b62 | 8864 | /* Get rid of the old-style declarations. */ |
f75fbaf7 ZW |
8865 | pop_scope (); |
8866 | push_scope (); | |
8867 | } | |
8868 | /* Don't issue this warning for nested functions, and don't issue this | |
8869 | warning if we got here because ARG_INFO_TYPES was error_mark_node | |
8870 | (this happens when a function definition has just an ellipsis in | |
8871 | its parameter list). */ | |
8400e75e DM |
8872 | else if (!in_system_header_at (input_location) |
8873 | && !current_function_scope | |
f8893e47 | 8874 | && arg_info->types != error_mark_node) |
c5d75364 MLI |
8875 | warning_at (DECL_SOURCE_LOCATION (fndecl), OPT_Wtraditional, |
8876 | "traditional C rejects ISO C style function definitions"); | |
51e29401 | 8877 | |
55d54003 ZW |
8878 | /* Now make all the parameter declarations visible in the function body. |
8879 | We can bypass most of the grunt work of pushdecl. */ | |
910ad8de | 8880 | for (decl = arg_info->parms; decl; decl = DECL_CHAIN (decl)) |
66db6b62 | 8881 | { |
55d54003 | 8882 | DECL_CONTEXT (decl) = current_function_decl; |
f75fbaf7 | 8883 | if (DECL_NAME (decl)) |
7c47d6e9 JM |
8884 | { |
8885 | bind (DECL_NAME (decl), decl, current_scope, | |
b3f27c15 JJ |
8886 | /*invisible=*/false, /*nested=*/false, |
8887 | UNKNOWN_LOCATION); | |
7c47d6e9 JM |
8888 | if (!TREE_USED (decl)) |
8889 | warn_if_shadowing (decl); | |
8890 | } | |
66db6b62 | 8891 | else |
c5d75364 | 8892 | error_at (DECL_SOURCE_LOCATION (decl), "parameter name omitted"); |
66db6b62 | 8893 | } |
26f943fd | 8894 | |
66db6b62 | 8895 | /* Record the parameter list in the function declaration. */ |
f8893e47 | 8896 | DECL_ARGUMENTS (fndecl) = arg_info->parms; |
51e29401 | 8897 | |
66db6b62 | 8898 | /* Now make all the ancillary declarations visible, likewise. */ |
910ad8de | 8899 | for (decl = arg_info->others; decl; decl = DECL_CHAIN (decl)) |
55d54003 ZW |
8900 | { |
8901 | DECL_CONTEXT (decl) = current_function_decl; | |
f75fbaf7 | 8902 | if (DECL_NAME (decl)) |
9aaabf8a | 8903 | bind (DECL_NAME (decl), decl, current_scope, |
10e76c1a JM |
8904 | /*invisible=*/false, |
8905 | /*nested=*/(TREE_CODE (decl) == FUNCTION_DECL), | |
8906 | UNKNOWN_LOCATION); | |
55d54003 | 8907 | } |
26f943fd | 8908 | |
66db6b62 | 8909 | /* And all the tag declarations. */ |
9771b263 | 8910 | FOR_EACH_VEC_SAFE_ELT_REVERSE (arg_info->tags, ix, tag) |
e60bf9d4 NF |
8911 | if (tag->id) |
8912 | bind (tag->id, tag->type, current_scope, | |
b3f27c15 | 8913 | /*invisible=*/false, /*nested=*/false, UNKNOWN_LOCATION); |
66db6b62 | 8914 | } |
1f731749 | 8915 | |
66db6b62 ZW |
8916 | /* Subroutine of store_parm_decls which handles old-style function |
8917 | definitions (separate parameter list and declarations). */ | |
51e29401 | 8918 | |
66db6b62 | 8919 | static void |
f8893e47 | 8920 | store_parm_decls_oldstyle (tree fndecl, const struct c_arg_info *arg_info) |
66db6b62 | 8921 | { |
f75fbaf7 | 8922 | struct c_binding *b; |
55d54003 | 8923 | tree parm, decl, last; |
f8893e47 | 8924 | tree parmids = arg_info->parms; |
6e2830c3 | 8925 | hash_set<tree> seen_args; |
66db6b62 | 8926 | |
8400e75e | 8927 | if (!in_system_header_at (input_location)) |
c2255bc4 AH |
8928 | warning_at (DECL_SOURCE_LOCATION (fndecl), |
8929 | OPT_Wold_style_definition, "old-style function definition"); | |
f75fbaf7 | 8930 | |
66db6b62 ZW |
8931 | /* Match each formal parameter name with its declaration. Save each |
8932 | decl in the appropriate TREE_PURPOSE slot of the parmids chain. */ | |
8933 | for (parm = parmids; parm; parm = TREE_CHAIN (parm)) | |
8934 | { | |
3fa8871b | 8935 | if (TREE_VALUE (parm) == NULL_TREE) |
7a0347ff | 8936 | { |
c2255bc4 AH |
8937 | error_at (DECL_SOURCE_LOCATION (fndecl), |
8938 | "parameter name missing from parameter list"); | |
3fa8871b | 8939 | TREE_PURPOSE (parm) = NULL_TREE; |
66db6b62 | 8940 | continue; |
7a0347ff | 8941 | } |
51e29401 | 8942 | |
f75fbaf7 | 8943 | b = I_SYMBOL_BINDING (TREE_VALUE (parm)); |
9aaabf8a | 8944 | if (b && B_IN_CURRENT_SCOPE (b)) |
51e29401 | 8945 | { |
f75fbaf7 | 8946 | decl = b->decl; |
c58e98c8 SM |
8947 | /* Skip erroneous parameters. */ |
8948 | if (decl == error_mark_node) | |
8949 | continue; | |
66db6b62 ZW |
8950 | /* If we got something other than a PARM_DECL it is an error. */ |
8951 | if (TREE_CODE (decl) != PARM_DECL) | |
a23faf7a MP |
8952 | { |
8953 | error_at (DECL_SOURCE_LOCATION (decl), | |
8954 | "%qD declared as a non-parameter", decl); | |
8955 | continue; | |
8956 | } | |
66db6b62 ZW |
8957 | /* If the declaration is already marked, we have a duplicate |
8958 | name. Complain and ignore the duplicate. */ | |
6e2830c3 | 8959 | else if (seen_args.contains (decl)) |
51e29401 | 8960 | { |
c2255bc4 AH |
8961 | error_at (DECL_SOURCE_LOCATION (decl), |
8962 | "multiple parameters named %qD", decl); | |
3fa8871b | 8963 | TREE_PURPOSE (parm) = NULL_TREE; |
66db6b62 | 8964 | continue; |
51e29401 | 8965 | } |
66db6b62 ZW |
8966 | /* If the declaration says "void", complain and turn it into |
8967 | an int. */ | |
8968 | else if (VOID_TYPE_P (TREE_TYPE (decl))) | |
51e29401 | 8969 | { |
c2255bc4 AH |
8970 | error_at (DECL_SOURCE_LOCATION (decl), |
8971 | "parameter %qD declared with void type", decl); | |
66db6b62 ZW |
8972 | TREE_TYPE (decl) = integer_type_node; |
8973 | DECL_ARG_TYPE (decl) = integer_type_node; | |
8974 | layout_decl (decl, 0); | |
51e29401 | 8975 | } |
7c47d6e9 | 8976 | warn_if_shadowing (decl); |
51e29401 | 8977 | } |
66db6b62 ZW |
8978 | /* If no declaration found, default to int. */ |
8979 | else | |
51e29401 | 8980 | { |
c2255bc4 AH |
8981 | /* FIXME diagnostics: This should be the location of the argument, |
8982 | not the FNDECL. E.g., for an old-style declaration | |
8983 | ||
8984 | int f10(v) { blah; } | |
8985 | ||
8986 | We should use the location of the V, not the F10. | |
8987 | Unfortunately, the V is an IDENTIFIER_NODE which has no | |
8988 | location. In the future we need locations for c_arg_info | |
8989 | entries. | |
8990 | ||
8991 | See gcc.dg/Wshadow-3.c for an example of this problem. */ | |
8992 | decl = build_decl (DECL_SOURCE_LOCATION (fndecl), | |
8993 | PARM_DECL, TREE_VALUE (parm), integer_type_node); | |
66db6b62 | 8994 | DECL_ARG_TYPE (decl) = TREE_TYPE (decl); |
66db6b62 | 8995 | pushdecl (decl); |
7c47d6e9 | 8996 | warn_if_shadowing (decl); |
66db6b62 ZW |
8997 | |
8998 | if (flag_isoc99) | |
c2255bc4 | 8999 | pedwarn (DECL_SOURCE_LOCATION (decl), |
92574c7c MP |
9000 | OPT_Wimplicit_int, "type of %qD defaults to %<int%>", |
9001 | decl); | |
b8698a0f | 9002 | else |
c2255bc4 AH |
9003 | warning_at (DECL_SOURCE_LOCATION (decl), |
9004 | OPT_Wmissing_parameter_type, | |
9005 | "type of %qD defaults to %<int%>", decl); | |
51e29401 RS |
9006 | } |
9007 | ||
66db6b62 | 9008 | TREE_PURPOSE (parm) = decl; |
6e2830c3 | 9009 | seen_args.add (decl); |
51e29401 | 9010 | } |
51e29401 | 9011 | |
55d54003 ZW |
9012 | /* Now examine the parms chain for incomplete declarations |
9013 | and declarations with no corresponding names. */ | |
51e29401 | 9014 | |
f75fbaf7 | 9015 | for (b = current_scope->bindings; b; b = b->prev) |
66db6b62 | 9016 | { |
f75fbaf7 ZW |
9017 | parm = b->decl; |
9018 | if (TREE_CODE (parm) != PARM_DECL) | |
9019 | continue; | |
9020 | ||
559f2da5 RH |
9021 | if (TREE_TYPE (parm) != error_mark_node |
9022 | && !COMPLETE_TYPE_P (TREE_TYPE (parm))) | |
51e29401 | 9023 | { |
c2255bc4 AH |
9024 | error_at (DECL_SOURCE_LOCATION (parm), |
9025 | "parameter %qD has incomplete type", parm); | |
66db6b62 ZW |
9026 | TREE_TYPE (parm) = error_mark_node; |
9027 | } | |
51e29401 | 9028 | |
6e2830c3 | 9029 | if (!seen_args.contains (parm)) |
66db6b62 | 9030 | { |
c2255bc4 AH |
9031 | error_at (DECL_SOURCE_LOCATION (parm), |
9032 | "declaration for parameter %qD but no such parameter", | |
9033 | parm); | |
51e29401 | 9034 | |
66db6b62 ZW |
9035 | /* Pretend the parameter was not missing. |
9036 | This gets us to a standard state and minimizes | |
9037 | further error messages. */ | |
9038 | parmids = chainon (parmids, tree_cons (parm, 0, 0)); | |
51e29401 | 9039 | } |
66db6b62 | 9040 | } |
51e29401 | 9041 | |
66db6b62 ZW |
9042 | /* Chain the declarations together in the order of the list of |
9043 | names. Store that chain in the function decl, replacing the | |
55d54003 | 9044 | list of names. Update the current scope to match. */ |
3fa8871b | 9045 | DECL_ARGUMENTS (fndecl) = NULL_TREE; |
66db6b62 | 9046 | |
55d54003 ZW |
9047 | for (parm = parmids; parm; parm = TREE_CHAIN (parm)) |
9048 | if (TREE_PURPOSE (parm)) | |
9049 | break; | |
9050 | if (parm && TREE_PURPOSE (parm)) | |
9051 | { | |
9052 | last = TREE_PURPOSE (parm); | |
9053 | DECL_ARGUMENTS (fndecl) = last; | |
55d54003 ZW |
9054 | |
9055 | for (parm = TREE_CHAIN (parm); parm; parm = TREE_CHAIN (parm)) | |
9056 | if (TREE_PURPOSE (parm)) | |
9057 | { | |
910ad8de | 9058 | DECL_CHAIN (last) = TREE_PURPOSE (parm); |
55d54003 | 9059 | last = TREE_PURPOSE (parm); |
55d54003 | 9060 | } |
3fa8871b | 9061 | DECL_CHAIN (last) = NULL_TREE; |
55d54003 | 9062 | } |
51e29401 | 9063 | |
66db6b62 ZW |
9064 | /* If there was a previous prototype, |
9065 | set the DECL_ARG_TYPE of each argument according to | |
9066 | the type previously specified, and report any mismatches. */ | |
51e29401 | 9067 | |
6fb58bba | 9068 | if (current_function_prototype_arg_types) |
66db6b62 ZW |
9069 | { |
9070 | tree type; | |
9071 | for (parm = DECL_ARGUMENTS (fndecl), | |
6fb58bba | 9072 | type = current_function_prototype_arg_types; |
7f5a7d78 MP |
9073 | parm || (type != NULL_TREE |
9074 | && TREE_VALUE (type) != error_mark_node | |
9075 | && TYPE_MAIN_VARIANT (TREE_VALUE (type)) != void_type_node); | |
910ad8de | 9076 | parm = DECL_CHAIN (parm), type = TREE_CHAIN (type)) |
51e29401 | 9077 | { |
7f5a7d78 MP |
9078 | if (parm == NULL_TREE |
9079 | || type == NULL_TREE | |
9080 | || (TREE_VALUE (type) != error_mark_node | |
9081 | && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node)) | |
51e29401 | 9082 | { |
6fb58bba | 9083 | if (current_function_prototype_built_in) |
c2255bc4 AH |
9084 | warning_at (DECL_SOURCE_LOCATION (fndecl), |
9085 | 0, "number of arguments doesn%'t match " | |
9086 | "built-in prototype"); | |
6fb58bba JM |
9087 | else |
9088 | { | |
c2255bc4 AH |
9089 | /* FIXME diagnostics: This should be the location of |
9090 | FNDECL, but there is bug when a prototype is | |
9091 | declared inside function context, but defined | |
9092 | outside of it (e.g., gcc.dg/pr15698-2.c). In | |
9093 | which case FNDECL gets the location of the | |
9094 | prototype, not the definition. */ | |
9095 | error_at (input_location, | |
9096 | "number of arguments doesn%'t match prototype"); | |
9097 | ||
9098 | error_at (current_function_prototype_locus, | |
9099 | "prototype declaration"); | |
6fb58bba | 9100 | } |
66db6b62 ZW |
9101 | break; |
9102 | } | |
9103 | /* Type for passing arg must be consistent with that | |
9104 | declared for the arg. ISO C says we take the unqualified | |
9105 | type for parameters declared with qualified type. */ | |
bb686a19 | 9106 | if (TREE_TYPE (parm) != error_mark_node |
7f5a7d78 | 9107 | && TREE_VALUE (type) != error_mark_node |
267bac10 JM |
9108 | && ((TYPE_ATOMIC (DECL_ARG_TYPE (parm)) |
9109 | != TYPE_ATOMIC (TREE_VALUE (type))) | |
9110 | || !comptypes (TYPE_MAIN_VARIANT (DECL_ARG_TYPE (parm)), | |
9111 | TYPE_MAIN_VARIANT (TREE_VALUE (type))))) | |
66db6b62 | 9112 | { |
267bac10 JM |
9113 | if ((TYPE_ATOMIC (DECL_ARG_TYPE (parm)) |
9114 | == TYPE_ATOMIC (TREE_VALUE (type))) | |
9115 | && (TYPE_MAIN_VARIANT (TREE_TYPE (parm)) | |
9116 | == TYPE_MAIN_VARIANT (TREE_VALUE (type)))) | |
51e29401 | 9117 | { |
66db6b62 ZW |
9118 | /* Adjust argument to match prototype. E.g. a previous |
9119 | `int foo(float);' prototype causes | |
9120 | `int foo(x) float x; {...}' to be treated like | |
9121 | `int foo(float x) {...}'. This is particularly | |
9122 | useful for argument types like uid_t. */ | |
9123 | DECL_ARG_TYPE (parm) = TREE_TYPE (parm); | |
9124 | ||
61f71b34 | 9125 | if (targetm.calls.promote_prototypes (TREE_TYPE (current_function_decl)) |
66db6b62 | 9126 | && INTEGRAL_TYPE_P (TREE_TYPE (parm)) |
7f5a7d78 MP |
9127 | && (TYPE_PRECISION (TREE_TYPE (parm)) |
9128 | < TYPE_PRECISION (integer_type_node))) | |
267bac10 JM |
9129 | DECL_ARG_TYPE (parm) |
9130 | = c_type_promotes_to (TREE_TYPE (parm)); | |
66db6b62 | 9131 | |
fcf73884 MLI |
9132 | /* ??? Is it possible to get here with a |
9133 | built-in prototype or will it always have | |
9134 | been diagnosed as conflicting with an | |
9135 | old-style definition and discarded? */ | |
9136 | if (current_function_prototype_built_in) | |
c2255bc4 | 9137 | warning_at (DECL_SOURCE_LOCATION (parm), |
c1771a20 | 9138 | OPT_Wpedantic, "promoted argument %qD " |
c2255bc4 | 9139 | "doesn%'t match built-in prototype", parm); |
fcf73884 | 9140 | else |
50a9145c | 9141 | { |
c2255bc4 | 9142 | pedwarn (DECL_SOURCE_LOCATION (parm), |
c1771a20 | 9143 | OPT_Wpedantic, "promoted argument %qD " |
fcf73884 | 9144 | "doesn%'t match prototype", parm); |
c1771a20 | 9145 | pedwarn (current_function_prototype_locus, OPT_Wpedantic, |
509c9d60 | 9146 | "prototype declaration"); |
50a9145c | 9147 | } |
51e29401 | 9148 | } |
66db6b62 ZW |
9149 | else |
9150 | { | |
6fb58bba | 9151 | if (current_function_prototype_built_in) |
c2255bc4 AH |
9152 | warning_at (DECL_SOURCE_LOCATION (parm), |
9153 | 0, "argument %qD doesn%'t match " | |
9154 | "built-in prototype", parm); | |
6fb58bba JM |
9155 | else |
9156 | { | |
c2255bc4 AH |
9157 | error_at (DECL_SOURCE_LOCATION (parm), |
9158 | "argument %qD doesn%'t match prototype", parm); | |
9159 | error_at (current_function_prototype_locus, | |
9160 | "prototype declaration"); | |
6fb58bba | 9161 | } |
66db6b62 | 9162 | } |
51e29401 | 9163 | } |
51e29401 | 9164 | } |
3fa8871b | 9165 | TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = NULL_TREE; |
66db6b62 | 9166 | } |
51e29401 | 9167 | |
66db6b62 | 9168 | /* Otherwise, create a prototype that would match. */ |
51e29401 | 9169 | |
66db6b62 ZW |
9170 | else |
9171 | { | |
3fa8871b | 9172 | tree actual = NULL_TREE, last = NULL_TREE, type; |
51e29401 | 9173 | |
910ad8de | 9174 | for (parm = DECL_ARGUMENTS (fndecl); parm; parm = DECL_CHAIN (parm)) |
66db6b62 ZW |
9175 | { |
9176 | type = tree_cons (NULL_TREE, DECL_ARG_TYPE (parm), NULL_TREE); | |
51e29401 RS |
9177 | if (last) |
9178 | TREE_CHAIN (last) = type; | |
9179 | else | |
9180 | actual = type; | |
66db6b62 ZW |
9181 | last = type; |
9182 | } | |
9183 | type = tree_cons (NULL_TREE, void_type_node, NULL_TREE); | |
9184 | if (last) | |
9185 | TREE_CHAIN (last) = type; | |
9186 | else | |
9187 | actual = type; | |
51e29401 | 9188 | |
66db6b62 ZW |
9189 | /* We are going to assign a new value for the TYPE_ACTUAL_ARG_TYPES |
9190 | of the type of this function, but we need to avoid having this | |
9191 | affect the types of other similarly-typed functions, so we must | |
9192 | first force the generation of an identical (but separate) type | |
9193 | node for the relevant function type. The new node we create | |
9194 | will be a variant of the main variant of the original function | |
9195 | type. */ | |
c138f328 | 9196 | |
8dd16ecc | 9197 | TREE_TYPE (fndecl) = build_variant_type_copy (TREE_TYPE (fndecl)); |
c138f328 | 9198 | |
66db6b62 ZW |
9199 | TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = actual; |
9200 | } | |
66db6b62 ZW |
9201 | } |
9202 | ||
d4e43dff ZL |
9203 | /* Store parameter declarations passed in ARG_INFO into the current |
9204 | function declaration. */ | |
9205 | ||
9206 | void | |
f8893e47 | 9207 | store_parm_decls_from (struct c_arg_info *arg_info) |
d4e43dff ZL |
9208 | { |
9209 | current_function_arg_info = arg_info; | |
9210 | store_parm_decls (); | |
9211 | } | |
9212 | ||
5c4abbb8 MP |
9213 | /* Called by walk_tree to look for and update context-less labels. */ |
9214 | ||
9215 | static tree | |
9216 | set_labels_context_r (tree *tp, int *walk_subtrees, void *data) | |
9217 | { | |
9218 | if (TREE_CODE (*tp) == LABEL_EXPR | |
9219 | && DECL_CONTEXT (LABEL_EXPR_LABEL (*tp)) == NULL_TREE) | |
9220 | { | |
9221 | DECL_CONTEXT (LABEL_EXPR_LABEL (*tp)) = static_cast<tree>(data); | |
9222 | *walk_subtrees = 0; | |
9223 | } | |
9224 | ||
9225 | return NULL_TREE; | |
9226 | } | |
9227 | ||
66db6b62 ZW |
9228 | /* Store the parameter declarations into the current function declaration. |
9229 | This is called after parsing the parameter declarations, before | |
9230 | digesting the body of the function. | |
9231 | ||
9232 | For an old-style definition, construct a prototype out of the old-style | |
9233 | parameter declarations and inject it into the function's type. */ | |
9234 | ||
9235 | void | |
9236 | store_parm_decls (void) | |
9237 | { | |
9238 | tree fndecl = current_function_decl; | |
7b112487 | 9239 | bool proto; |
66db6b62 | 9240 | |
77dbdb57 | 9241 | /* The argument information block for FNDECL. */ |
f8893e47 | 9242 | struct c_arg_info *arg_info = current_function_arg_info; |
7b112487 | 9243 | current_function_arg_info = 0; |
77dbdb57 | 9244 | |
f75fbaf7 ZW |
9245 | /* True if this definition is written with a prototype. Note: |
9246 | despite C99 6.7.5.3p14, we can *not* treat an empty argument | |
9247 | list in a function definition as equivalent to (void) -- an | |
9248 | empty argument list specifies the function has no parameters, | |
9249 | but only (void) sets up a prototype for future calls. */ | |
f8893e47 | 9250 | proto = arg_info->types != 0; |
66db6b62 | 9251 | |
f75fbaf7 | 9252 | if (proto) |
77dbdb57 | 9253 | store_parm_decls_newstyle (fndecl, arg_info); |
66db6b62 | 9254 | else |
77dbdb57 | 9255 | store_parm_decls_oldstyle (fndecl, arg_info); |
51e29401 | 9256 | |
f75fbaf7 | 9257 | /* The next call to push_scope will be a function body. */ |
51e29401 | 9258 | |
a8ccdffe | 9259 | next_is_function_body = true; |
51e29401 | 9260 | |
51e29401 RS |
9261 | /* Write a record describing this function definition to the prototypes |
9262 | file (if requested). */ | |
9263 | ||
f75fbaf7 | 9264 | gen_aux_info_record (fndecl, 1, 0, proto); |
51e29401 RS |
9265 | |
9266 | /* Initialize the RTL code for the function. */ | |
182e0d71 | 9267 | allocate_struct_function (fndecl, false); |
51e29401 | 9268 | |
3797cb21 | 9269 | if (warn_unused_local_typedefs) |
766090c2 | 9270 | cfun->language = ggc_cleared_alloc<language_function> (); |
3797cb21 | 9271 | |
8f17b5c5 | 9272 | /* Begin the statement tree for this function. */ |
325c3691 | 9273 | DECL_SAVED_TREE (fndecl) = push_stmt_list (); |
51e29401 | 9274 | |
82c82743 | 9275 | /* ??? Insert the contents of the pending sizes list into the function |
4744afba RH |
9276 | to be evaluated. The only reason left to have this is |
9277 | void foo(int n, int array[n++]) | |
9278 | because we throw away the array type in favor of a pointer type, and | |
9279 | thus won't naturally see the SAVE_EXPR containing the increment. All | |
9280 | other pending sizes would be handled by gimplify_parameters. */ | |
a04a722b | 9281 | if (arg_info->pending_sizes) |
5c4abbb8 MP |
9282 | { |
9283 | /* In very special circumstances, e.g. for code like | |
9284 | _Atomic int i = 5; | |
9285 | void f (int a[i += 2]) {} | |
9286 | we need to execute the atomic assignment on function entry. | |
9287 | But in this case, it is not just a straight store, it has the | |
9288 | op= form, which means that build_atomic_assign has generated | |
9289 | gotos, labels, etc. Because at that time the function decl | |
9290 | for F has not been created yet, those labels do not have any | |
9291 | function context. But we have the fndecl now, so update the | |
9292 | labels accordingly. gimplify_expr would crash otherwise. */ | |
9293 | walk_tree_without_duplicates (&arg_info->pending_sizes, | |
9294 | set_labels_context_r, fndecl); | |
9295 | add_stmt (arg_info->pending_sizes); | |
9296 | } | |
51e29401 | 9297 | } |
acf0174b JJ |
9298 | |
9299 | /* Store PARM_DECLs in PARMS into scope temporarily. Used for | |
9300 | c_finish_omp_declare_simd for function prototypes. No diagnostics | |
9301 | should be done. */ | |
9302 | ||
9303 | void | |
9304 | temp_store_parm_decls (tree fndecl, tree parms) | |
9305 | { | |
9306 | push_scope (); | |
9307 | for (tree p = parms; p; p = DECL_CHAIN (p)) | |
9308 | { | |
9309 | DECL_CONTEXT (p) = fndecl; | |
9310 | if (DECL_NAME (p)) | |
9311 | bind (DECL_NAME (p), p, current_scope, | |
9312 | /*invisible=*/false, /*nested=*/false, | |
9313 | UNKNOWN_LOCATION); | |
9314 | } | |
9315 | } | |
9316 | ||
9317 | /* Undo what temp_store_parm_decls did. */ | |
9318 | ||
9319 | void | |
9320 | temp_pop_parm_decls (void) | |
9321 | { | |
9322 | /* Clear all bindings in this temporary scope, so that | |
9323 | pop_scope doesn't create a BLOCK. */ | |
9324 | struct c_binding *b = current_scope->bindings; | |
9325 | current_scope->bindings = NULL; | |
9326 | for (; b; b = free_binding_and_advance (b)) | |
9327 | { | |
fce5e5e3 JJ |
9328 | gcc_assert (TREE_CODE (b->decl) == PARM_DECL |
9329 | || b->decl == error_mark_node); | |
acf0174b JJ |
9330 | gcc_assert (I_SYMBOL_BINDING (b->id) == b); |
9331 | I_SYMBOL_BINDING (b->id) = b->shadowed; | |
9332 | if (b->shadowed && b->shadowed->u.type) | |
9333 | TREE_TYPE (b->shadowed->decl) = b->shadowed->u.type; | |
9334 | } | |
9335 | pop_scope (); | |
9336 | } | |
51e29401 | 9337 | \f |
6de9cd9a | 9338 | |
51e29401 | 9339 | /* Finish up a function declaration and compile that function |
cc343f65 | 9340 | all the way to assembler language output. Then free the storage |
51e29401 RS |
9341 | for the function definition. |
9342 | ||
4a46cbfb | 9343 | This is called after parsing the body of the function definition. */ |
51e29401 RS |
9344 | |
9345 | void | |
edaf3e03 | 9346 | finish_function (void) |
51e29401 | 9347 | { |
b3694847 | 9348 | tree fndecl = current_function_decl; |
6c39e757 NP |
9349 | |
9350 | if (c_dialect_objc ()) | |
9351 | objc_finish_function (); | |
51e29401 | 9352 | |
61f71b34 DD |
9353 | if (TREE_CODE (fndecl) == FUNCTION_DECL |
9354 | && targetm.calls.promote_prototypes (TREE_TYPE (fndecl))) | |
9355 | { | |
9356 | tree args = DECL_ARGUMENTS (fndecl); | |
910ad8de | 9357 | for (; args; args = DECL_CHAIN (args)) |
c22cacf3 MS |
9358 | { |
9359 | tree type = TREE_TYPE (args); | |
9360 | if (INTEGRAL_TYPE_P (type) | |
9361 | && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) | |
267bac10 | 9362 | DECL_ARG_TYPE (args) = c_type_promotes_to (type); |
c22cacf3 | 9363 | } |
61f71b34 DD |
9364 | } |
9365 | ||
67b28863 | 9366 | if (DECL_INITIAL (fndecl) && DECL_INITIAL (fndecl) != error_mark_node) |
af3fbed1 | 9367 | BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; |
51e29401 RS |
9368 | |
9369 | /* Must mark the RESULT_DECL as being in this function. */ | |
9370 | ||
67b28863 | 9371 | if (DECL_RESULT (fndecl) && DECL_RESULT (fndecl) != error_mark_node) |
af3fbed1 | 9372 | DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl; |
51e29401 | 9373 | |
4003301d MLI |
9374 | if (MAIN_NAME_P (DECL_NAME (fndecl)) && flag_hosted |
9375 | && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (fndecl))) | |
9376 | == integer_type_node && flag_isoc99) | |
9377 | { | |
4003301d MLI |
9378 | /* Hack. We don't want the middle-end to warn that this return |
9379 | is unreachable, so we mark its location as special. Using | |
9380 | UNKNOWN_LOCATION has the problem that it gets clobbered in | |
9381 | annotate_one_with_locus. A cleaner solution might be to | |
9382 | ensure ! should_carry_locus_p (stmt), but that needs a flag. | |
9383 | */ | |
c2255bc4 | 9384 | c_finish_return (BUILTINS_LOCATION, integer_zero_node, NULL_TREE); |
51e29401 | 9385 | } |
35b1a6fa | 9386 | |
8f17b5c5 | 9387 | /* Tie off the statement tree for this function. */ |
325c3691 RH |
9388 | DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl)); |
9389 | ||
9390 | finish_fname_decls (); | |
5ce89b2e JM |
9391 | |
9392 | /* Complain if there's just no return statement. */ | |
46cfb101 JM |
9393 | if (warn_return_type |
9394 | && TREE_CODE (TREE_TYPE (TREE_TYPE (fndecl))) != VOID_TYPE | |
5ce89b2e | 9395 | && !current_function_returns_value && !current_function_returns_null |
41806d92 | 9396 | /* Don't complain if we are no-return. */ |
5ce89b2e | 9397 | && !current_function_returns_abnormally |
ef5d1181 JJ |
9398 | /* Don't complain if we are declared noreturn. */ |
9399 | && !TREE_THIS_VOLATILE (fndecl) | |
5ce89b2e JM |
9400 | /* Don't warn for main(). */ |
9401 | && !MAIN_NAME_P (DECL_NAME (fndecl)) | |
9402 | /* Or if they didn't actually specify a return type. */ | |
9403 | && !C_FUNCTION_IMPLICIT_INT (fndecl) | |
7e8b322a JH |
9404 | /* Normally, with -Wreturn-type, flow will complain, but we might |
9405 | optimize out static functions. */ | |
9406 | && !TREE_PUBLIC (fndecl)) | |
9da58884 | 9407 | { |
3176a0c2 DD |
9408 | warning (OPT_Wreturn_type, |
9409 | "no return statement in function returning non-void"); | |
9da58884 JH |
9410 | TREE_NO_WARNING (fndecl) = 1; |
9411 | } | |
5ce89b2e | 9412 | |
ebfbbdc5 JJ |
9413 | /* Complain about parameters that are only set, but never otherwise used. */ |
9414 | if (warn_unused_but_set_parameter) | |
9415 | { | |
9416 | tree decl; | |
9417 | ||
9418 | for (decl = DECL_ARGUMENTS (fndecl); | |
9419 | decl; | |
910ad8de | 9420 | decl = DECL_CHAIN (decl)) |
ebfbbdc5 JJ |
9421 | if (TREE_USED (decl) |
9422 | && TREE_CODE (decl) == PARM_DECL | |
9423 | && !DECL_READ_P (decl) | |
9424 | && DECL_NAME (decl) | |
9425 | && !DECL_ARTIFICIAL (decl) | |
9426 | && !TREE_NO_WARNING (decl)) | |
9427 | warning_at (DECL_SOURCE_LOCATION (decl), | |
9428 | OPT_Wunused_but_set_parameter, | |
9429 | "parameter %qD set but not used", decl); | |
9430 | } | |
9431 | ||
3797cb21 DS |
9432 | /* Complain about locally defined typedefs that are not used in this |
9433 | function. */ | |
9434 | maybe_warn_unused_local_typedefs (); | |
9435 | ||
da2e71c9 MLI |
9436 | /* Possibly warn about unused parameters. */ |
9437 | if (warn_unused_parameter) | |
9438 | do_warn_unused_parameter (fndecl); | |
9439 | ||
6de9cd9a DN |
9440 | /* Store the end of the function, so that we get good line number |
9441 | info for the epilogue. */ | |
9442 | cfun->function_end_locus = input_location; | |
9443 | ||
b2ca3702 MM |
9444 | /* Finalize the ELF visibility for the function. */ |
9445 | c_determine_visibility (fndecl); | |
9446 | ||
c536a6a7 | 9447 | /* For GNU C extern inline functions disregard inline limits. */ |
b8698a0f | 9448 | if (DECL_EXTERNAL (fndecl) |
673a107a JJ |
9449 | && DECL_DECLARED_INLINE_P (fndecl) |
9450 | && (flag_gnu89_inline | |
9451 | || lookup_attribute ("gnu_inline", DECL_ATTRIBUTES (fndecl)))) | |
c536a6a7 RG |
9452 | DECL_DISREGARD_INLINE_LIMITS (fndecl) = 1; |
9453 | ||
6de9cd9a DN |
9454 | /* Genericize before inlining. Delay genericizing nested functions |
9455 | until their parent function is genericized. Since finalizing | |
9456 | requires GENERIC, delay that as well. */ | |
118a3a8b | 9457 | |
73aea290 JM |
9458 | if (DECL_INITIAL (fndecl) && DECL_INITIAL (fndecl) != error_mark_node |
9459 | && !undef_nested_function) | |
6de9cd9a DN |
9460 | { |
9461 | if (!decl_function_context (fndecl)) | |
c22cacf3 | 9462 | { |
1c701f96 | 9463 | invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl); |
c22cacf3 | 9464 | c_genericize (fndecl); |
1a94c545 JH |
9465 | |
9466 | /* ??? Objc emits functions after finalizing the compilation unit. | |
9467 | This should be cleaned up later and this conditional removed. */ | |
3dafb85c | 9468 | if (symtab->global_info_ready) |
1a94c545 | 9469 | { |
d52f5295 | 9470 | cgraph_node::add_new_function (fndecl, false); |
1a94c545 JH |
9471 | return; |
9472 | } | |
3dafb85c | 9473 | cgraph_node::finalize_function (fndecl, false); |
c22cacf3 | 9474 | } |
6de9cd9a | 9475 | else |
c22cacf3 MS |
9476 | { |
9477 | /* Register this function with cgraph just far enough to get it | |
9478 | added to our parent's nested function list. Handy, since the | |
9479 | C front end doesn't have such a list. */ | |
d52f5295 | 9480 | (void) cgraph_node::get_create (fndecl); |
c22cacf3 | 9481 | } |
6de9cd9a DN |
9482 | } |
9483 | ||
73aea290 JM |
9484 | if (!decl_function_context (fndecl)) |
9485 | undef_nested_function = false; | |
9486 | ||
3797cb21 DS |
9487 | if (cfun->language != NULL) |
9488 | { | |
9489 | ggc_free (cfun->language); | |
9490 | cfun->language = NULL; | |
9491 | } | |
9492 | ||
1da326c3 | 9493 | /* We're leaving the context of this function, so zap cfun. |
6de9cd9a | 9494 | It's still in DECL_STRUCT_FUNCTION, and we'll restore it in |
1da326c3 | 9495 | tree_rest_of_compilation. */ |
db2960f4 | 9496 | set_cfun (NULL); |
ea5b45b6 | 9497 | invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION, current_function_decl); |
4a46cbfb | 9498 | current_function_decl = NULL; |
8f17b5c5 | 9499 | } |
51e29401 | 9500 | \f |
77c4d6c0 | 9501 | /* Check the declarations given in a for-loop for satisfying the C99 |
c2255bc4 | 9502 | constraints. If exactly one such decl is found, return it. LOC is |
f05b9d93 NP |
9503 | the location of the opening parenthesis of the for loop. The last |
9504 | parameter allows you to control the "for loop initial declarations | |
9505 | are only allowed in C99 mode". Normally, you should pass | |
9506 | flag_isoc99 as that parameter. But in some cases (Objective-C | |
9507 | foreach loop, for example) we want to run the checks in this | |
9508 | function even if not in C99 mode, so we allow the caller to turn | |
9509 | off the error about not being in C99 mode. | |
9510 | */ | |
953ff289 DN |
9511 | |
9512 | tree | |
f05b9d93 | 9513 | check_for_loop_decls (location_t loc, bool turn_off_iso_c99_error) |
77c4d6c0 | 9514 | { |
f75fbaf7 | 9515 | struct c_binding *b; |
953ff289 DN |
9516 | tree one_decl = NULL_TREE; |
9517 | int n_decls = 0; | |
9518 | ||
f05b9d93 | 9519 | if (!turn_off_iso_c99_error) |
77c4d6c0 | 9520 | { |
e9527cfd | 9521 | static bool hint = true; |
77c4d6c0 JM |
9522 | /* If we get here, declarations have been used in a for loop without |
9523 | the C99 for loop scope. This doesn't make much sense, so don't | |
9524 | allow it. */ | |
c2255bc4 | 9525 | error_at (loc, "%<for%> loop initial declarations " |
92f20202 | 9526 | "are only allowed in C99 or C11 mode"); |
e9527cfd MLI |
9527 | if (hint) |
9528 | { | |
c2255bc4 | 9529 | inform (loc, |
92f20202 MP |
9530 | "use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 " |
9531 | "to compile your code"); | |
e9527cfd MLI |
9532 | hint = false; |
9533 | } | |
953ff289 | 9534 | return NULL_TREE; |
77c4d6c0 JM |
9535 | } |
9536 | /* C99 subclause 6.8.5 paragraph 3: | |
9537 | ||
9538 | [#3] The declaration part of a for statement shall only | |
9539 | declare identifiers for objects having storage class auto or | |
9540 | register. | |
9541 | ||
9542 | It isn't clear whether, in this sentence, "identifiers" binds to | |
9543 | "shall only declare" or to "objects" - that is, whether all identifiers | |
9544 | declared must be identifiers for objects, or whether the restriction | |
9545 | only applies to those that are. (A question on this in comp.std.c | |
9546 | in November 2000 received no answer.) We implement the strictest | |
9547 | interpretation, to avoid creating an extension which later causes | |
9548 | problems. */ | |
9549 | ||
f75fbaf7 | 9550 | for (b = current_scope->bindings; b; b = b->prev) |
77c4d6c0 | 9551 | { |
f75fbaf7 ZW |
9552 | tree id = b->id; |
9553 | tree decl = b->decl; | |
53fcdc76 | 9554 | |
f75fbaf7 ZW |
9555 | if (!id) |
9556 | continue; | |
9557 | ||
9558 | switch (TREE_CODE (decl)) | |
9559 | { | |
9560 | case VAR_DECL: | |
c2255bc4 AH |
9561 | { |
9562 | location_t decl_loc = DECL_SOURCE_LOCATION (decl); | |
9563 | if (TREE_STATIC (decl)) | |
9564 | error_at (decl_loc, | |
9565 | "declaration of static variable %qD in %<for%> loop " | |
9566 | "initial declaration", decl); | |
9567 | else if (DECL_EXTERNAL (decl)) | |
9568 | error_at (decl_loc, | |
9569 | "declaration of %<extern%> variable %qD in %<for%> loop " | |
9570 | "initial declaration", decl); | |
9571 | } | |
f75fbaf7 ZW |
9572 | break; |
9573 | ||
9574 | case RECORD_TYPE: | |
c2255bc4 AH |
9575 | error_at (loc, |
9576 | "%<struct %E%> declared in %<for%> loop initial " | |
9577 | "declaration", id); | |
f75fbaf7 ZW |
9578 | break; |
9579 | case UNION_TYPE: | |
c2255bc4 AH |
9580 | error_at (loc, |
9581 | "%<union %E%> declared in %<for%> loop initial declaration", | |
9582 | id); | |
f75fbaf7 ZW |
9583 | break; |
9584 | case ENUMERAL_TYPE: | |
c2255bc4 AH |
9585 | error_at (loc, "%<enum %E%> declared in %<for%> loop " |
9586 | "initial declaration", id); | |
f75fbaf7 ZW |
9587 | break; |
9588 | default: | |
c2255bc4 AH |
9589 | error_at (loc, "declaration of non-variable " |
9590 | "%qD in %<for%> loop initial declaration", decl); | |
f75fbaf7 | 9591 | } |
953ff289 DN |
9592 | |
9593 | n_decls++; | |
9594 | one_decl = decl; | |
77c4d6c0 | 9595 | } |
953ff289 DN |
9596 | |
9597 | return n_decls == 1 ? one_decl : NULL_TREE; | |
77c4d6c0 JM |
9598 | } |
9599 | \f | |
51e29401 RS |
9600 | /* Save and reinitialize the variables |
9601 | used during compilation of a C function. */ | |
9602 | ||
9603 | void | |
d2784db4 | 9604 | c_push_function_context (void) |
51e29401 | 9605 | { |
b6fbbea3 MI |
9606 | struct language_function *p = cfun->language; |
9607 | /* cfun->language might have been already allocated by the use of | |
9608 | -Wunused-local-typedefs. In that case, just re-use it. */ | |
9609 | if (p == NULL) | |
766090c2 | 9610 | cfun->language = p = ggc_cleared_alloc<language_function> (); |
51e29401 | 9611 | |
8f17b5c5 | 9612 | p->base.x_stmt_tree = c_stmt_tree; |
9771b263 | 9613 | c_stmt_tree.x_cur_stmt_list = vec_safe_copy (c_stmt_tree.x_cur_stmt_list); |
506e2710 RH |
9614 | p->x_break_label = c_break_label; |
9615 | p->x_cont_label = c_cont_label; | |
9616 | p->x_switch_stack = c_switch_stack; | |
7b112487 | 9617 | p->arg_info = current_function_arg_info; |
51e29401 RS |
9618 | p->returns_value = current_function_returns_value; |
9619 | p->returns_null = current_function_returns_null; | |
5ce89b2e | 9620 | p->returns_abnormally = current_function_returns_abnormally; |
51e29401 | 9621 | p->warn_about_return_type = warn_about_return_type; |
d2784db4 PB |
9622 | |
9623 | push_function_context (); | |
51e29401 RS |
9624 | } |
9625 | ||
9626 | /* Restore the variables used during compilation of a C function. */ | |
9627 | ||
9628 | void | |
d2784db4 | 9629 | c_pop_function_context (void) |
51e29401 | 9630 | { |
d2784db4 PB |
9631 | struct language_function *p; |
9632 | ||
9633 | pop_function_context (); | |
9634 | p = cfun->language; | |
b6fbbea3 MI |
9635 | |
9636 | /* When -Wunused-local-typedefs is in effect, cfun->languages is | |
9637 | used to store data throughout the life time of the current cfun, | |
9638 | So don't deallocate it. */ | |
9639 | if (!warn_unused_local_typedefs) | |
9640 | cfun->language = NULL; | |
51e29401 | 9641 | |
1da326c3 | 9642 | if (DECL_STRUCT_FUNCTION (current_function_decl) == 0 |
8f17b5c5 | 9643 | && DECL_SAVED_TREE (current_function_decl) == NULL_TREE) |
51e29401 RS |
9644 | { |
9645 | /* Stop pointing to the local nodes about to be freed. */ | |
9646 | /* But DECL_INITIAL must remain nonzero so we know this | |
9647 | was an actual function definition. */ | |
9648 | DECL_INITIAL (current_function_decl) = error_mark_node; | |
3fa8871b | 9649 | DECL_ARGUMENTS (current_function_decl) = NULL_TREE; |
51e29401 RS |
9650 | } |
9651 | ||
8f17b5c5 | 9652 | c_stmt_tree = p->base.x_stmt_tree; |
b6fbbea3 | 9653 | p->base.x_stmt_tree.x_cur_stmt_list = NULL; |
506e2710 RH |
9654 | c_break_label = p->x_break_label; |
9655 | c_cont_label = p->x_cont_label; | |
9656 | c_switch_stack = p->x_switch_stack; | |
7b112487 | 9657 | current_function_arg_info = p->arg_info; |
51e29401 RS |
9658 | current_function_returns_value = p->returns_value; |
9659 | current_function_returns_null = p->returns_null; | |
5ce89b2e | 9660 | current_function_returns_abnormally = p->returns_abnormally; |
51e29401 | 9661 | warn_about_return_type = p->warn_about_return_type; |
1526a060 BS |
9662 | } |
9663 | ||
f2c5f623 BC |
9664 | /* The functions below are required for functionality of doing |
9665 | function at once processing in the C front end. Currently these | |
9666 | functions are not called from anywhere in the C front end, but as | |
6645c3fa | 9667 | these changes continue, that will change. */ |
f2c5f623 | 9668 | |
ae499cce MM |
9669 | /* Returns the stmt_tree (if any) to which statements are currently |
9670 | being added. If there is no active statement-tree, NULL is | |
9671 | returned. */ | |
9672 | ||
9673 | stmt_tree | |
35b1a6fa | 9674 | current_stmt_tree (void) |
ae499cce | 9675 | { |
8f17b5c5 MM |
9676 | return &c_stmt_tree; |
9677 | } | |
9678 | ||
339a28b9 | 9679 | /* Return the global value of T as a symbol. */ |
5fd8e536 JM |
9680 | |
9681 | tree | |
35b1a6fa | 9682 | identifier_global_value (tree t) |
5fd8e536 | 9683 | { |
f75fbaf7 | 9684 | struct c_binding *b; |
339a28b9 | 9685 | |
f75fbaf7 | 9686 | for (b = I_SYMBOL_BINDING (t); b; b = b->shadowed) |
9aaabf8a | 9687 | if (B_IN_FILE_SCOPE (b) || B_IN_EXTERNAL_SCOPE (b)) |
f75fbaf7 | 9688 | return b->decl; |
339a28b9 | 9689 | |
6574d78e | 9690 | return NULL_TREE; |
5fd8e536 | 9691 | } |
eaa7c03f | 9692 | |
3a636414 JM |
9693 | /* In C, the only C-linkage public declaration is at file scope. */ |
9694 | ||
9695 | tree | |
9696 | c_linkage_bindings (tree name) | |
9697 | { | |
9698 | return identifier_global_value (name); | |
9699 | } | |
9700 | ||
eaa7c03f JM |
9701 | /* Record a builtin type for C. If NAME is non-NULL, it is the name used; |
9702 | otherwise the name is found in ridpointers from RID_INDEX. */ | |
9703 | ||
9704 | void | |
35b1a6fa | 9705 | record_builtin_type (enum rid rid_index, const char *name, tree type) |
eaa7c03f | 9706 | { |
ca043393 | 9707 | tree id, decl; |
eaa7c03f JM |
9708 | if (name == 0) |
9709 | id = ridpointers[(int) rid_index]; | |
9710 | else | |
9711 | id = get_identifier (name); | |
c2255bc4 | 9712 | decl = build_decl (UNKNOWN_LOCATION, TYPE_DECL, id, type); |
ca043393 ZW |
9713 | pushdecl (decl); |
9714 | if (debug_hooks->type_decl) | |
9715 | debug_hooks->type_decl (decl, false); | |
eaa7c03f JM |
9716 | } |
9717 | ||
9718 | /* Build the void_list_node (void_type_node having been created). */ | |
9719 | tree | |
35b1a6fa | 9720 | build_void_list_node (void) |
eaa7c03f JM |
9721 | { |
9722 | tree t = build_tree_list (NULL_TREE, void_type_node); | |
9723 | return t; | |
9724 | } | |
81a75f0f | 9725 | |
f8893e47 | 9726 | /* Return a c_parm structure with the given SPECS, ATTRS and DECLARATOR. */ |
00325bce | 9727 | |
f8893e47 | 9728 | struct c_parm * |
deb176fa | 9729 | build_c_parm (struct c_declspecs *specs, tree attrs, |
8139a48e DM |
9730 | struct c_declarator *declarator, |
9731 | location_t loc) | |
00325bce | 9732 | { |
f8893e47 JM |
9733 | struct c_parm *ret = XOBNEW (&parser_obstack, struct c_parm); |
9734 | ret->specs = specs; | |
9735 | ret->attrs = attrs; | |
9736 | ret->declarator = declarator; | |
8139a48e | 9737 | ret->loc = loc; |
f8893e47 | 9738 | return ret; |
00325bce JM |
9739 | } |
9740 | ||
9741 | /* Return a declarator with nested attributes. TARGET is the inner | |
9742 | declarator to which these attributes apply. ATTRS are the | |
9743 | attributes. */ | |
9744 | ||
f8893e47 JM |
9745 | struct c_declarator * |
9746 | build_attrs_declarator (tree attrs, struct c_declarator *target) | |
00325bce | 9747 | { |
f8893e47 JM |
9748 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); |
9749 | ret->kind = cdk_attrs; | |
9750 | ret->declarator = target; | |
9751 | ret->u.attrs = attrs; | |
9752 | return ret; | |
00325bce JM |
9753 | } |
9754 | ||
9755 | /* Return a declarator for a function with arguments specified by ARGS | |
9756 | and return type specified by TARGET. */ | |
9757 | ||
f8893e47 JM |
9758 | struct c_declarator * |
9759 | build_function_declarator (struct c_arg_info *args, | |
9760 | struct c_declarator *target) | |
00325bce | 9761 | { |
f8893e47 JM |
9762 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); |
9763 | ret->kind = cdk_function; | |
9764 | ret->declarator = target; | |
9765 | ret->u.arg_info = args; | |
9766 | return ret; | |
9767 | } | |
9768 | ||
9769 | /* Return a declarator for the identifier IDENT (which may be | |
9770 | NULL_TREE for an abstract declarator). */ | |
9771 | ||
9772 | struct c_declarator * | |
9773 | build_id_declarator (tree ident) | |
9774 | { | |
9775 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); | |
9776 | ret->kind = cdk_id; | |
9777 | ret->declarator = 0; | |
9778 | ret->u.id = ident; | |
6037d88d PB |
9779 | /* Default value - may get reset to a more precise location. */ |
9780 | ret->id_loc = input_location; | |
f8893e47 | 9781 | return ret; |
00325bce JM |
9782 | } |
9783 | ||
81a75f0f NB |
9784 | /* Return something to represent absolute declarators containing a *. |
9785 | TARGET is the absolute declarator that the * contains. | |
deb176fa JM |
9786 | TYPE_QUALS_ATTRS is a structure for type qualifiers and attributes |
9787 | to apply to the pointer type. */ | |
81a75f0f | 9788 | |
f8893e47 | 9789 | struct c_declarator * |
deb176fa JM |
9790 | make_pointer_declarator (struct c_declspecs *type_quals_attrs, |
9791 | struct c_declarator *target) | |
81a75f0f | 9792 | { |
deb176fa | 9793 | tree attrs; |
3b53cddc | 9794 | int quals = 0; |
f8893e47 JM |
9795 | struct c_declarator *itarget = target; |
9796 | struct c_declarator *ret = XOBNEW (&parser_obstack, struct c_declarator); | |
deb176fa JM |
9797 | if (type_quals_attrs) |
9798 | { | |
9799 | attrs = type_quals_attrs->attrs; | |
3b53cddc | 9800 | quals = quals_from_declspecs (type_quals_attrs); |
deb176fa JM |
9801 | if (attrs != NULL_TREE) |
9802 | itarget = build_attrs_declarator (attrs, target); | |
9803 | } | |
f8893e47 JM |
9804 | ret->kind = cdk_pointer; |
9805 | ret->declarator = itarget; | |
3b53cddc | 9806 | ret->u.pointer_quals = quals; |
deb176fa JM |
9807 | return ret; |
9808 | } | |
9809 | ||
9810 | /* Return a pointer to a structure for an empty list of declaration | |
9811 | specifiers. */ | |
9812 | ||
9813 | struct c_declspecs * | |
9814 | build_null_declspecs (void) | |
9815 | { | |
9816 | struct c_declspecs *ret = XOBNEW (&parser_obstack, struct c_declspecs); | |
f48dfe98 | 9817 | memset (ret, 0, sizeof *ret); |
d19fa6b5 | 9818 | ret->align_log = -1; |
98c3a782 | 9819 | ret->typespec_word = cts_none; |
9a26d6ee | 9820 | ret->storage_class = csc_none; |
928c19bb | 9821 | ret->expr_const_operands = true; |
9e5b2115 | 9822 | ret->typespec_kind = ctsk_none; |
36c5e70a | 9823 | ret->address_space = ADDR_SPACE_GENERIC; |
f8893e47 | 9824 | return ret; |
81a75f0f | 9825 | } |
e2500fed | 9826 | |
36c5e70a BE |
9827 | /* Add the address space ADDRSPACE to the declaration specifiers |
9828 | SPECS, returning SPECS. */ | |
9829 | ||
9830 | struct c_declspecs * | |
0b2c4be5 DS |
9831 | declspecs_add_addrspace (source_location location, |
9832 | struct c_declspecs *specs, addr_space_t as) | |
36c5e70a BE |
9833 | { |
9834 | specs->non_sc_seen_p = true; | |
9835 | specs->declspecs_seen_p = true; | |
9836 | ||
9837 | if (!ADDR_SPACE_GENERIC_P (specs->address_space) | |
9838 | && specs->address_space != as) | |
9839 | error ("incompatible address space qualifiers %qs and %qs", | |
9840 | c_addr_space_name (as), | |
9841 | c_addr_space_name (specs->address_space)); | |
9842 | else | |
0b2c4be5 DS |
9843 | { |
9844 | specs->address_space = as; | |
9845 | specs->locations[cdw_address_space] = location; | |
9846 | } | |
36c5e70a BE |
9847 | return specs; |
9848 | } | |
9849 | ||
deb176fa JM |
9850 | /* Add the type qualifier QUAL to the declaration specifiers SPECS, |
9851 | returning SPECS. */ | |
9852 | ||
9853 | struct c_declspecs * | |
0b2c4be5 DS |
9854 | declspecs_add_qual (source_location loc, |
9855 | struct c_declspecs *specs, tree qual) | |
deb176fa JM |
9856 | { |
9857 | enum rid i; | |
3b53cddc | 9858 | bool dupe = false; |
deb176fa | 9859 | specs->non_sc_seen_p = true; |
27bf414c | 9860 | specs->declspecs_seen_p = true; |
deb176fa JM |
9861 | gcc_assert (TREE_CODE (qual) == IDENTIFIER_NODE |
9862 | && C_IS_RESERVED_WORD (qual)); | |
9863 | i = C_RID_CODE (qual); | |
e3455240 | 9864 | location_t prev_loc = UNKNOWN_LOCATION; |
3b53cddc JM |
9865 | switch (i) |
9866 | { | |
9867 | case RID_CONST: | |
9868 | dupe = specs->const_p; | |
9869 | specs->const_p = true; | |
d6e83a8d | 9870 | prev_loc = specs->locations[cdw_const]; |
0b2c4be5 | 9871 | specs->locations[cdw_const] = loc; |
3b53cddc JM |
9872 | break; |
9873 | case RID_VOLATILE: | |
9874 | dupe = specs->volatile_p; | |
9875 | specs->volatile_p = true; | |
d6e83a8d | 9876 | prev_loc = specs->locations[cdw_volatile]; |
0b2c4be5 | 9877 | specs->locations[cdw_volatile] = loc; |
3b53cddc JM |
9878 | break; |
9879 | case RID_RESTRICT: | |
9880 | dupe = specs->restrict_p; | |
9881 | specs->restrict_p = true; | |
d6e83a8d | 9882 | prev_loc = specs->locations[cdw_restrict]; |
0b2c4be5 | 9883 | specs->locations[cdw_restrict] = loc; |
3b53cddc | 9884 | break; |
267bac10 JM |
9885 | case RID_ATOMIC: |
9886 | dupe = specs->atomic_p; | |
9887 | specs->atomic_p = true; | |
d6e83a8d MM |
9888 | prev_loc = specs->locations[cdw_atomic]; |
9889 | specs->locations[cdw_atomic] = loc; | |
267bac10 | 9890 | break; |
3b53cddc JM |
9891 | default: |
9892 | gcc_unreachable (); | |
9893 | } | |
f3bede71 | 9894 | if (dupe) |
d6e83a8d MM |
9895 | { |
9896 | bool warned = pedwarn_c90 (loc, OPT_Wpedantic, | |
9897 | "duplicate %qE declaration specifier", qual); | |
9898 | if (!warned | |
9899 | && warn_duplicate_decl_specifier | |
9900 | && prev_loc >= RESERVED_LOCATION_COUNT | |
9901 | && !from_macro_expansion_at (prev_loc) | |
9902 | && !from_macro_expansion_at (loc)) | |
9903 | warning_at (loc, OPT_Wduplicate_decl_specifier, | |
9904 | "duplicate %qE declaration specifier", qual); | |
9905 | } | |
deb176fa JM |
9906 | return specs; |
9907 | } | |
9908 | ||
9909 | /* Add the type specifier TYPE to the declaration specifiers SPECS, | |
9910 | returning SPECS. */ | |
9911 | ||
9912 | struct c_declspecs * | |
dc491a25 ILT |
9913 | declspecs_add_type (location_t loc, struct c_declspecs *specs, |
9914 | struct c_typespec spec) | |
deb176fa | 9915 | { |
81da229b | 9916 | tree type = spec.spec; |
deb176fa | 9917 | specs->non_sc_seen_p = true; |
27bf414c | 9918 | specs->declspecs_seen_p = true; |
9e5b2115 | 9919 | specs->typespec_kind = spec.kind; |
deb176fa JM |
9920 | if (TREE_DEPRECATED (type)) |
9921 | specs->deprecated_p = true; | |
deb176fa | 9922 | |
98c3a782 | 9923 | /* Handle type specifier keywords. */ |
eea1139b ILT |
9924 | if (TREE_CODE (type) == IDENTIFIER_NODE |
9925 | && C_IS_RESERVED_WORD (type) | |
9926 | && C_RID_CODE (type) != RID_CXX_COMPAT_WARN) | |
deb176fa JM |
9927 | { |
9928 | enum rid i = C_RID_CODE (type); | |
98c3a782 JM |
9929 | if (specs->type) |
9930 | { | |
dc491a25 | 9931 | error_at (loc, "two or more data types in declaration specifiers"); |
98c3a782 JM |
9932 | return specs; |
9933 | } | |
deb176fa JM |
9934 | if ((int) i <= (int) RID_LAST_MODIFIER) |
9935 | { | |
ab22c1fa | 9936 | /* "long", "short", "signed", "unsigned", "_Complex" or "_Sat". */ |
98c3a782 JM |
9937 | bool dupe = false; |
9938 | switch (i) | |
deb176fa | 9939 | { |
98c3a782 | 9940 | case RID_LONG: |
deb176fa | 9941 | if (specs->long_long_p) |
deb176fa | 9942 | { |
dc491a25 | 9943 | error_at (loc, "%<long long long%> is too long for GCC"); |
98c3a782 JM |
9944 | break; |
9945 | } | |
9946 | if (specs->long_p) | |
9947 | { | |
9948 | if (specs->typespec_word == cts_double) | |
9949 | { | |
dc491a25 ILT |
9950 | error_at (loc, |
9951 | ("both %<long long%> and %<double%> in " | |
9952 | "declaration specifiers")); | |
98c3a782 JM |
9953 | break; |
9954 | } | |
dc491a25 | 9955 | pedwarn_c90 (loc, OPT_Wlong_long, |
9c650d90 | 9956 | "ISO C90 does not support %<long long%>"); |
deb176fa | 9957 | specs->long_long_p = 1; |
0b2c4be5 | 9958 | specs->locations[cdw_long_long] = loc; |
98c3a782 | 9959 | break; |
deb176fa | 9960 | } |
98c3a782 | 9961 | if (specs->short_p) |
dc491a25 ILT |
9962 | error_at (loc, |
9963 | ("both %<long%> and %<short%> in " | |
9964 | "declaration specifiers")); | |
38b7bc7f JM |
9965 | else if (specs->typespec_word == cts_auto_type) |
9966 | error_at (loc, | |
9967 | ("both %<long%> and %<__auto_type%> in " | |
9968 | "declaration specifiers")); | |
98c3a782 | 9969 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
9970 | error_at (loc, |
9971 | ("both %<long%> and %<void%> in " | |
9972 | "declaration specifiers")); | |
78a7c317 | 9973 | else if (specs->typespec_word == cts_int_n) |
a6766312 | 9974 | error_at (loc, |
78a7c317 DD |
9975 | ("both %<long%> and %<__int%d%> in " |
9976 | "declaration specifiers"), | |
9977 | int_n_data[specs->int_n_idx].bitsize); | |
98c3a782 | 9978 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
9979 | error_at (loc, |
9980 | ("both %<long%> and %<_Bool%> in " | |
9981 | "declaration specifiers")); | |
98c3a782 | 9982 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
9983 | error_at (loc, |
9984 | ("both %<long%> and %<char%> in " | |
9985 | "declaration specifiers")); | |
98c3a782 | 9986 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
9987 | error_at (loc, |
9988 | ("both %<long%> and %<float%> in " | |
9989 | "declaration specifiers")); | |
c65699ef JM |
9990 | else if (specs->typespec_word == cts_floatn_nx) |
9991 | error_at (loc, | |
9992 | ("both %<long%> and %<_Float%d%s%> in " | |
9993 | "declaration specifiers"), | |
9994 | floatn_nx_types[specs->floatn_nx_idx].n, | |
9995 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
9996 | ? "x" | |
9997 | : "")); | |
9a8ce21f | 9998 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
9999 | error_at (loc, |
10000 | ("both %<long%> and %<_Decimal32%> in " | |
10001 | "declaration specifiers")); | |
9a8ce21f | 10002 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10003 | error_at (loc, |
10004 | ("both %<long%> and %<_Decimal64%> in " | |
10005 | "declaration specifiers")); | |
9a8ce21f | 10006 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10007 | error_at (loc, |
10008 | ("both %<long%> and %<_Decimal128%> in " | |
10009 | "declaration specifiers")); | |
98c3a782 | 10010 | else |
0b2c4be5 DS |
10011 | { |
10012 | specs->long_p = true; | |
10013 | specs->locations[cdw_long] = loc; | |
10014 | } | |
98c3a782 JM |
10015 | break; |
10016 | case RID_SHORT: | |
10017 | dupe = specs->short_p; | |
10018 | if (specs->long_p) | |
dc491a25 ILT |
10019 | error_at (loc, |
10020 | ("both %<long%> and %<short%> in " | |
10021 | "declaration specifiers")); | |
38b7bc7f JM |
10022 | else if (specs->typespec_word == cts_auto_type) |
10023 | error_at (loc, | |
10024 | ("both %<short%> and %<__auto_type%> in " | |
10025 | "declaration specifiers")); | |
98c3a782 | 10026 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10027 | error_at (loc, |
10028 | ("both %<short%> and %<void%> in " | |
10029 | "declaration specifiers")); | |
78a7c317 | 10030 | else if (specs->typespec_word == cts_int_n) |
a6766312 | 10031 | error_at (loc, |
78a7c317 DD |
10032 | ("both %<short%> and %<__int%d%> in " |
10033 | "declaration specifiers"), | |
10034 | int_n_data[specs->int_n_idx].bitsize); | |
98c3a782 | 10035 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10036 | error_at (loc, |
10037 | ("both %<short%> and %<_Bool%> in " | |
10038 | "declaration specifiers")); | |
98c3a782 | 10039 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
10040 | error_at (loc, |
10041 | ("both %<short%> and %<char%> in " | |
10042 | "declaration specifiers")); | |
98c3a782 | 10043 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10044 | error_at (loc, |
10045 | ("both %<short%> and %<float%> in " | |
10046 | "declaration specifiers")); | |
98c3a782 | 10047 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
10048 | error_at (loc, |
10049 | ("both %<short%> and %<double%> in " | |
10050 | "declaration specifiers")); | |
c65699ef JM |
10051 | else if (specs->typespec_word == cts_floatn_nx) |
10052 | error_at (loc, | |
10053 | ("both %<short%> and %<_Float%d%s%> in " | |
10054 | "declaration specifiers"), | |
10055 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10056 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10057 | ? "x" | |
10058 | : "")); | |
9a8ce21f | 10059 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10060 | error_at (loc, |
10061 | ("both %<short%> and %<_Decimal32%> in " | |
10062 | "declaration specifiers")); | |
9a8ce21f | 10063 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10064 | error_at (loc, |
10065 | ("both %<short%> and %<_Decimal64%> in " | |
10066 | "declaration specifiers")); | |
9a8ce21f | 10067 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10068 | error_at (loc, |
10069 | ("both %<short%> and %<_Decimal128%> in " | |
10070 | "declaration specifiers")); | |
98c3a782 | 10071 | else |
0b2c4be5 DS |
10072 | { |
10073 | specs->short_p = true; | |
10074 | specs->locations[cdw_short] = loc; | |
10075 | } | |
98c3a782 JM |
10076 | break; |
10077 | case RID_SIGNED: | |
10078 | dupe = specs->signed_p; | |
10079 | if (specs->unsigned_p) | |
dc491a25 ILT |
10080 | error_at (loc, |
10081 | ("both %<signed%> and %<unsigned%> in " | |
10082 | "declaration specifiers")); | |
38b7bc7f JM |
10083 | else if (specs->typespec_word == cts_auto_type) |
10084 | error_at (loc, | |
10085 | ("both %<signed%> and %<__auto_type%> in " | |
10086 | "declaration specifiers")); | |
98c3a782 | 10087 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10088 | error_at (loc, |
10089 | ("both %<signed%> and %<void%> in " | |
10090 | "declaration specifiers")); | |
98c3a782 | 10091 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10092 | error_at (loc, |
10093 | ("both %<signed%> and %<_Bool%> in " | |
10094 | "declaration specifiers")); | |
98c3a782 | 10095 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10096 | error_at (loc, |
10097 | ("both %<signed%> and %<float%> in " | |
10098 | "declaration specifiers")); | |
98c3a782 | 10099 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
10100 | error_at (loc, |
10101 | ("both %<signed%> and %<double%> in " | |
10102 | "declaration specifiers")); | |
c65699ef JM |
10103 | else if (specs->typespec_word == cts_floatn_nx) |
10104 | error_at (loc, | |
10105 | ("both %<signed%> and %<_Float%d%s%> in " | |
10106 | "declaration specifiers"), | |
10107 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10108 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10109 | ? "x" | |
10110 | : "")); | |
9a8ce21f | 10111 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10112 | error_at (loc, |
10113 | ("both %<signed%> and %<_Decimal32%> in " | |
10114 | "declaration specifiers")); | |
9a8ce21f | 10115 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10116 | error_at (loc, |
10117 | ("both %<signed%> and %<_Decimal64%> in " | |
10118 | "declaration specifiers")); | |
9a8ce21f | 10119 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10120 | error_at (loc, |
10121 | ("both %<signed%> and %<_Decimal128%> in " | |
10122 | "declaration specifiers")); | |
98c3a782 | 10123 | else |
0b2c4be5 DS |
10124 | { |
10125 | specs->signed_p = true; | |
10126 | specs->locations[cdw_signed] = loc; | |
10127 | } | |
98c3a782 JM |
10128 | break; |
10129 | case RID_UNSIGNED: | |
10130 | dupe = specs->unsigned_p; | |
10131 | if (specs->signed_p) | |
dc491a25 ILT |
10132 | error_at (loc, |
10133 | ("both %<signed%> and %<unsigned%> in " | |
10134 | "declaration specifiers")); | |
38b7bc7f JM |
10135 | else if (specs->typespec_word == cts_auto_type) |
10136 | error_at (loc, | |
10137 | ("both %<unsigned%> and %<__auto_type%> in " | |
10138 | "declaration specifiers")); | |
98c3a782 | 10139 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10140 | error_at (loc, |
10141 | ("both %<unsigned%> and %<void%> in " | |
10142 | "declaration specifiers")); | |
98c3a782 | 10143 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10144 | error_at (loc, |
10145 | ("both %<unsigned%> and %<_Bool%> in " | |
10146 | "declaration specifiers")); | |
98c3a782 | 10147 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10148 | error_at (loc, |
10149 | ("both %<unsigned%> and %<float%> in " | |
10150 | "declaration specifiers")); | |
98c3a782 | 10151 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
10152 | error_at (loc, |
10153 | ("both %<unsigned%> and %<double%> in " | |
10154 | "declaration specifiers")); | |
c65699ef JM |
10155 | else if (specs->typespec_word == cts_floatn_nx) |
10156 | error_at (loc, | |
10157 | ("both %<unsigned%> and %<_Float%d%s%> in " | |
10158 | "declaration specifiers"), | |
10159 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10160 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10161 | ? "x" | |
10162 | : "")); | |
9a8ce21f | 10163 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10164 | error_at (loc, |
10165 | ("both %<unsigned%> and %<_Decimal32%> in " | |
10166 | "declaration specifiers")); | |
9a8ce21f | 10167 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10168 | error_at (loc, |
10169 | ("both %<unsigned%> and %<_Decimal64%> in " | |
10170 | "declaration specifiers")); | |
9a8ce21f | 10171 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10172 | error_at (loc, |
10173 | ("both %<unsigned%> and %<_Decimal128%> in " | |
10174 | "declaration specifiers")); | |
98c3a782 | 10175 | else |
0b2c4be5 DS |
10176 | { |
10177 | specs->unsigned_p = true; | |
10178 | specs->locations[cdw_unsigned] = loc; | |
10179 | } | |
98c3a782 JM |
10180 | break; |
10181 | case RID_COMPLEX: | |
10182 | dupe = specs->complex_p; | |
f3bede71 MP |
10183 | if (!in_system_header_at (loc)) |
10184 | pedwarn_c90 (loc, OPT_Wpedantic, | |
10185 | "ISO C90 does not support complex types"); | |
38b7bc7f JM |
10186 | if (specs->typespec_word == cts_auto_type) |
10187 | error_at (loc, | |
10188 | ("both %<complex%> and %<__auto_type%> in " | |
10189 | "declaration specifiers")); | |
10190 | else if (specs->typespec_word == cts_void) | |
dc491a25 ILT |
10191 | error_at (loc, |
10192 | ("both %<complex%> and %<void%> in " | |
10193 | "declaration specifiers")); | |
98c3a782 | 10194 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10195 | error_at (loc, |
10196 | ("both %<complex%> and %<_Bool%> in " | |
10197 | "declaration specifiers")); | |
9a8ce21f | 10198 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10199 | error_at (loc, |
10200 | ("both %<complex%> and %<_Decimal32%> in " | |
10201 | "declaration specifiers")); | |
9a8ce21f | 10202 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10203 | error_at (loc, |
10204 | ("both %<complex%> and %<_Decimal64%> in " | |
10205 | "declaration specifiers")); | |
9a8ce21f | 10206 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10207 | error_at (loc, |
10208 | ("both %<complex%> and %<_Decimal128%> in " | |
10209 | "declaration specifiers")); | |
ab22c1fa | 10210 | else if (specs->typespec_word == cts_fract) |
dc491a25 ILT |
10211 | error_at (loc, |
10212 | ("both %<complex%> and %<_Fract%> in " | |
10213 | "declaration specifiers")); | |
ab22c1fa | 10214 | else if (specs->typespec_word == cts_accum) |
dc491a25 ILT |
10215 | error_at (loc, |
10216 | ("both %<complex%> and %<_Accum%> in " | |
10217 | "declaration specifiers")); | |
ab22c1fa | 10218 | else if (specs->saturating_p) |
dc491a25 ILT |
10219 | error_at (loc, |
10220 | ("both %<complex%> and %<_Sat%> in " | |
10221 | "declaration specifiers")); | |
98c3a782 | 10222 | else |
0b2c4be5 DS |
10223 | { |
10224 | specs->complex_p = true; | |
10225 | specs->locations[cdw_complex] = loc; | |
10226 | } | |
98c3a782 | 10227 | break; |
ab22c1fa CF |
10228 | case RID_SAT: |
10229 | dupe = specs->saturating_p; | |
c1771a20 | 10230 | pedwarn (loc, OPT_Wpedantic, |
dc491a25 | 10231 | "ISO C does not support saturating types"); |
78a7c317 | 10232 | if (specs->typespec_word == cts_int_n) |
a6766312 KT |
10233 | { |
10234 | error_at (loc, | |
78a7c317 DD |
10235 | ("both %<_Sat%> and %<__int%d%> in " |
10236 | "declaration specifiers"), | |
10237 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 | 10238 | } |
38b7bc7f JM |
10239 | else if (specs->typespec_word == cts_auto_type) |
10240 | error_at (loc, | |
10241 | ("both %<_Sat%> and %<__auto_type%> in " | |
10242 | "declaration specifiers")); | |
a6766312 | 10243 | else if (specs->typespec_word == cts_void) |
dc491a25 ILT |
10244 | error_at (loc, |
10245 | ("both %<_Sat%> and %<void%> in " | |
10246 | "declaration specifiers")); | |
ab22c1fa | 10247 | else if (specs->typespec_word == cts_bool) |
dc491a25 ILT |
10248 | error_at (loc, |
10249 | ("both %<_Sat%> and %<_Bool%> in " | |
10250 | "declaration specifiers")); | |
ab22c1fa | 10251 | else if (specs->typespec_word == cts_char) |
dc491a25 ILT |
10252 | error_at (loc, |
10253 | ("both %<_Sat%> and %<char%> in " | |
10254 | "declaration specifiers")); | |
ab22c1fa | 10255 | else if (specs->typespec_word == cts_int) |
dc491a25 ILT |
10256 | error_at (loc, |
10257 | ("both %<_Sat%> and %<int%> in " | |
10258 | "declaration specifiers")); | |
ab22c1fa | 10259 | else if (specs->typespec_word == cts_float) |
dc491a25 ILT |
10260 | error_at (loc, |
10261 | ("both %<_Sat%> and %<float%> in " | |
10262 | "declaration specifiers")); | |
ab22c1fa | 10263 | else if (specs->typespec_word == cts_double) |
dc491a25 ILT |
10264 | error_at (loc, |
10265 | ("both %<_Sat%> and %<double%> in " | |
10266 | "declaration specifiers")); | |
c65699ef JM |
10267 | else if (specs->typespec_word == cts_floatn_nx) |
10268 | error_at (loc, | |
10269 | ("both %<_Sat%> and %<_Float%d%s%> in " | |
10270 | "declaration specifiers"), | |
10271 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10272 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10273 | ? "x" | |
10274 | : "")); | |
ab22c1fa | 10275 | else if (specs->typespec_word == cts_dfloat32) |
dc491a25 ILT |
10276 | error_at (loc, |
10277 | ("both %<_Sat%> and %<_Decimal32%> in " | |
10278 | "declaration specifiers")); | |
ab22c1fa | 10279 | else if (specs->typespec_word == cts_dfloat64) |
dc491a25 ILT |
10280 | error_at (loc, |
10281 | ("both %<_Sat%> and %<_Decimal64%> in " | |
10282 | "declaration specifiers")); | |
ab22c1fa | 10283 | else if (specs->typespec_word == cts_dfloat128) |
dc491a25 ILT |
10284 | error_at (loc, |
10285 | ("both %<_Sat%> and %<_Decimal128%> in " | |
10286 | "declaration specifiers")); | |
ab22c1fa | 10287 | else if (specs->complex_p) |
dc491a25 ILT |
10288 | error_at (loc, |
10289 | ("both %<_Sat%> and %<complex%> in " | |
10290 | "declaration specifiers")); | |
ab22c1fa | 10291 | else |
0b2c4be5 DS |
10292 | { |
10293 | specs->saturating_p = true; | |
10294 | specs->locations[cdw_saturating] = loc; | |
10295 | } | |
ab22c1fa | 10296 | break; |
98c3a782 JM |
10297 | default: |
10298 | gcc_unreachable (); | |
deb176fa | 10299 | } |
98c3a782 JM |
10300 | |
10301 | if (dupe) | |
dc491a25 | 10302 | error_at (loc, "duplicate %qE", type); |
deb176fa | 10303 | |
deb176fa JM |
10304 | return specs; |
10305 | } | |
98c3a782 JM |
10306 | else |
10307 | { | |
c65699ef JM |
10308 | /* "void", "_Bool", "char", "int", "float", "double", |
10309 | "_FloatN", "_FloatNx", "_Decimal32", "__intN", | |
10310 | "_Decimal64", "_Decimal128", "_Fract", "_Accum" or | |
38b7bc7f | 10311 | "__auto_type". */ |
98c3a782 JM |
10312 | if (specs->typespec_word != cts_none) |
10313 | { | |
dc491a25 ILT |
10314 | error_at (loc, |
10315 | "two or more data types in declaration specifiers"); | |
98c3a782 JM |
10316 | return specs; |
10317 | } | |
10318 | switch (i) | |
10319 | { | |
38b7bc7f JM |
10320 | case RID_AUTO_TYPE: |
10321 | if (specs->long_p) | |
10322 | error_at (loc, | |
10323 | ("both %<long%> and %<__auto_type%> in " | |
10324 | "declaration specifiers")); | |
10325 | else if (specs->short_p) | |
10326 | error_at (loc, | |
10327 | ("both %<short%> and %<__auto_type%> in " | |
10328 | "declaration specifiers")); | |
10329 | else if (specs->signed_p) | |
10330 | error_at (loc, | |
10331 | ("both %<signed%> and %<__auto_type%> in " | |
10332 | "declaration specifiers")); | |
10333 | else if (specs->unsigned_p) | |
10334 | error_at (loc, | |
10335 | ("both %<unsigned%> and %<__auto_type%> in " | |
10336 | "declaration specifiers")); | |
10337 | else if (specs->complex_p) | |
10338 | error_at (loc, | |
10339 | ("both %<complex%> and %<__auto_type%> in " | |
10340 | "declaration specifiers")); | |
10341 | else if (specs->saturating_p) | |
10342 | error_at (loc, | |
10343 | ("both %<_Sat%> and %<__auto_type%> in " | |
10344 | "declaration specifiers")); | |
10345 | else | |
10346 | { | |
10347 | specs->typespec_word = cts_auto_type; | |
10348 | specs->locations[cdw_typespec] = loc; | |
10349 | } | |
10350 | return specs; | |
78a7c317 DD |
10351 | case RID_INT_N_0: |
10352 | case RID_INT_N_1: | |
10353 | case RID_INT_N_2: | |
10354 | case RID_INT_N_3: | |
10355 | specs->int_n_idx = i - RID_INT_N_0; | |
9edc6e4c | 10356 | if (!in_system_header_at (input_location)) |
c1771a20 | 10357 | pedwarn (loc, OPT_Wpedantic, |
78a7c317 DD |
10358 | "ISO C does not support %<__int%d%> types", |
10359 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
10360 | |
10361 | if (specs->long_p) | |
10362 | error_at (loc, | |
78a7c317 DD |
10363 | ("both %<__int%d%> and %<long%> in " |
10364 | "declaration specifiers"), | |
10365 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
10366 | else if (specs->saturating_p) |
10367 | error_at (loc, | |
78a7c317 DD |
10368 | ("both %<_Sat%> and %<__int%d%> in " |
10369 | "declaration specifiers"), | |
10370 | int_n_data[specs->int_n_idx].bitsize); | |
a6766312 KT |
10371 | else if (specs->short_p) |
10372 | error_at (loc, | |
78a7c317 DD |
10373 | ("both %<__int%d%> and %<short%> in " |
10374 | "declaration specifiers"), | |
10375 | int_n_data[specs->int_n_idx].bitsize); | |
fe377a48 MP |
10376 | else if (! int_n_enabled_p[specs->int_n_idx]) |
10377 | { | |
10378 | specs->typespec_word = cts_int_n; | |
10379 | error_at (loc, | |
10380 | "%<__int%d%> is not supported on this target", | |
10381 | int_n_data[specs->int_n_idx].bitsize); | |
10382 | } | |
a6766312 | 10383 | else |
0b2c4be5 | 10384 | { |
78a7c317 | 10385 | specs->typespec_word = cts_int_n; |
0b2c4be5 DS |
10386 | specs->locations[cdw_typespec] = loc; |
10387 | } | |
a6766312 | 10388 | return specs; |
98c3a782 JM |
10389 | case RID_VOID: |
10390 | if (specs->long_p) | |
dc491a25 ILT |
10391 | error_at (loc, |
10392 | ("both %<long%> and %<void%> in " | |
10393 | "declaration specifiers")); | |
98c3a782 | 10394 | else if (specs->short_p) |
dc491a25 ILT |
10395 | error_at (loc, |
10396 | ("both %<short%> and %<void%> in " | |
10397 | "declaration specifiers")); | |
98c3a782 | 10398 | else if (specs->signed_p) |
dc491a25 ILT |
10399 | error_at (loc, |
10400 | ("both %<signed%> and %<void%> in " | |
10401 | "declaration specifiers")); | |
98c3a782 | 10402 | else if (specs->unsigned_p) |
dc491a25 ILT |
10403 | error_at (loc, |
10404 | ("both %<unsigned%> and %<void%> in " | |
10405 | "declaration specifiers")); | |
98c3a782 | 10406 | else if (specs->complex_p) |
dc491a25 ILT |
10407 | error_at (loc, |
10408 | ("both %<complex%> and %<void%> in " | |
10409 | "declaration specifiers")); | |
ab22c1fa | 10410 | else if (specs->saturating_p) |
dc491a25 ILT |
10411 | error_at (loc, |
10412 | ("both %<_Sat%> and %<void%> in " | |
10413 | "declaration specifiers")); | |
98c3a782 | 10414 | else |
0b2c4be5 DS |
10415 | { |
10416 | specs->typespec_word = cts_void; | |
10417 | specs->locations[cdw_typespec] = loc; | |
10418 | } | |
98c3a782 JM |
10419 | return specs; |
10420 | case RID_BOOL: | |
f3bede71 MP |
10421 | if (!in_system_header_at (loc)) |
10422 | pedwarn_c90 (loc, OPT_Wpedantic, | |
10423 | "ISO C90 does not support boolean types"); | |
98c3a782 | 10424 | if (specs->long_p) |
dc491a25 ILT |
10425 | error_at (loc, |
10426 | ("both %<long%> and %<_Bool%> in " | |
10427 | "declaration specifiers")); | |
98c3a782 | 10428 | else if (specs->short_p) |
dc491a25 ILT |
10429 | error_at (loc, |
10430 | ("both %<short%> and %<_Bool%> in " | |
10431 | "declaration specifiers")); | |
98c3a782 | 10432 | else if (specs->signed_p) |
dc491a25 ILT |
10433 | error_at (loc, |
10434 | ("both %<signed%> and %<_Bool%> in " | |
10435 | "declaration specifiers")); | |
98c3a782 | 10436 | else if (specs->unsigned_p) |
dc491a25 ILT |
10437 | error_at (loc, |
10438 | ("both %<unsigned%> and %<_Bool%> in " | |
10439 | "declaration specifiers")); | |
98c3a782 | 10440 | else if (specs->complex_p) |
dc491a25 ILT |
10441 | error_at (loc, |
10442 | ("both %<complex%> and %<_Bool%> in " | |
10443 | "declaration specifiers")); | |
ab22c1fa | 10444 | else if (specs->saturating_p) |
dc491a25 ILT |
10445 | error_at (loc, |
10446 | ("both %<_Sat%> and %<_Bool%> in " | |
10447 | "declaration specifiers")); | |
98c3a782 | 10448 | else |
0b2c4be5 DS |
10449 | { |
10450 | specs->typespec_word = cts_bool; | |
10451 | specs->locations[cdw_typespec] = loc; | |
10452 | } | |
98c3a782 JM |
10453 | return specs; |
10454 | case RID_CHAR: | |
10455 | if (specs->long_p) | |
dc491a25 ILT |
10456 | error_at (loc, |
10457 | ("both %<long%> and %<char%> in " | |
10458 | "declaration specifiers")); | |
98c3a782 | 10459 | else if (specs->short_p) |
dc491a25 ILT |
10460 | error_at (loc, |
10461 | ("both %<short%> and %<char%> in " | |
10462 | "declaration specifiers")); | |
ab22c1fa | 10463 | else if (specs->saturating_p) |
dc491a25 ILT |
10464 | error_at (loc, |
10465 | ("both %<_Sat%> and %<char%> in " | |
10466 | "declaration specifiers")); | |
98c3a782 | 10467 | else |
0b2c4be5 DS |
10468 | { |
10469 | specs->typespec_word = cts_char; | |
10470 | specs->locations[cdw_typespec] = loc; | |
10471 | } | |
98c3a782 JM |
10472 | return specs; |
10473 | case RID_INT: | |
ab22c1fa | 10474 | if (specs->saturating_p) |
dc491a25 ILT |
10475 | error_at (loc, |
10476 | ("both %<_Sat%> and %<int%> in " | |
10477 | "declaration specifiers")); | |
ab22c1fa | 10478 | else |
0b2c4be5 DS |
10479 | { |
10480 | specs->typespec_word = cts_int; | |
10481 | specs->locations[cdw_typespec] = loc; | |
10482 | } | |
98c3a782 JM |
10483 | return specs; |
10484 | case RID_FLOAT: | |
10485 | if (specs->long_p) | |
dc491a25 ILT |
10486 | error_at (loc, |
10487 | ("both %<long%> and %<float%> in " | |
10488 | "declaration specifiers")); | |
98c3a782 | 10489 | else if (specs->short_p) |
dc491a25 ILT |
10490 | error_at (loc, |
10491 | ("both %<short%> and %<float%> in " | |
10492 | "declaration specifiers")); | |
98c3a782 | 10493 | else if (specs->signed_p) |
dc491a25 ILT |
10494 | error_at (loc, |
10495 | ("both %<signed%> and %<float%> in " | |
10496 | "declaration specifiers")); | |
98c3a782 | 10497 | else if (specs->unsigned_p) |
dc491a25 ILT |
10498 | error_at (loc, |
10499 | ("both %<unsigned%> and %<float%> in " | |
10500 | "declaration specifiers")); | |
ab22c1fa | 10501 | else if (specs->saturating_p) |
dc491a25 ILT |
10502 | error_at (loc, |
10503 | ("both %<_Sat%> and %<float%> in " | |
10504 | "declaration specifiers")); | |
98c3a782 | 10505 | else |
0b2c4be5 DS |
10506 | { |
10507 | specs->typespec_word = cts_float; | |
10508 | specs->locations[cdw_typespec] = loc; | |
10509 | } | |
98c3a782 JM |
10510 | return specs; |
10511 | case RID_DOUBLE: | |
10512 | if (specs->long_long_p) | |
dc491a25 ILT |
10513 | error_at (loc, |
10514 | ("both %<long long%> and %<double%> in " | |
10515 | "declaration specifiers")); | |
98c3a782 | 10516 | else if (specs->short_p) |
dc491a25 ILT |
10517 | error_at (loc, |
10518 | ("both %<short%> and %<double%> in " | |
10519 | "declaration specifiers")); | |
98c3a782 | 10520 | else if (specs->signed_p) |
dc491a25 ILT |
10521 | error_at (loc, |
10522 | ("both %<signed%> and %<double%> in " | |
10523 | "declaration specifiers")); | |
98c3a782 | 10524 | else if (specs->unsigned_p) |
dc491a25 ILT |
10525 | error_at (loc, |
10526 | ("both %<unsigned%> and %<double%> in " | |
10527 | "declaration specifiers")); | |
ab22c1fa | 10528 | else if (specs->saturating_p) |
dc491a25 ILT |
10529 | error_at (loc, |
10530 | ("both %<_Sat%> and %<double%> in " | |
10531 | "declaration specifiers")); | |
98c3a782 | 10532 | else |
0b2c4be5 DS |
10533 | { |
10534 | specs->typespec_word = cts_double; | |
10535 | specs->locations[cdw_typespec] = loc; | |
10536 | } | |
98c3a782 | 10537 | return specs; |
c65699ef JM |
10538 | CASE_RID_FLOATN_NX: |
10539 | specs->floatn_nx_idx = i - RID_FLOATN_NX_FIRST; | |
10540 | if (!in_system_header_at (input_location)) | |
10541 | pedwarn (loc, OPT_Wpedantic, | |
10542 | "ISO C does not support the %<_Float%d%s%> type", | |
10543 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10544 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10545 | ? "x" | |
10546 | : "")); | |
10547 | ||
10548 | if (specs->long_p) | |
10549 | error_at (loc, | |
10550 | ("both %<long%> and %<_Float%d%s%> in " | |
10551 | "declaration specifiers"), | |
10552 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10553 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10554 | ? "x" | |
10555 | : "")); | |
10556 | else if (specs->short_p) | |
10557 | error_at (loc, | |
10558 | ("both %<short%> and %<_Float%d%s%> in " | |
10559 | "declaration specifiers"), | |
10560 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10561 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10562 | ? "x" | |
10563 | : "")); | |
10564 | else if (specs->signed_p) | |
10565 | error_at (loc, | |
10566 | ("both %<signed%> and %<_Float%d%s%> in " | |
10567 | "declaration specifiers"), | |
10568 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10569 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10570 | ? "x" | |
10571 | : "")); | |
10572 | else if (specs->unsigned_p) | |
10573 | error_at (loc, | |
10574 | ("both %<unsigned%> and %<_Float%d%s%> in " | |
10575 | "declaration specifiers"), | |
10576 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10577 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10578 | ? "x" | |
10579 | : "")); | |
10580 | else if (specs->saturating_p) | |
10581 | error_at (loc, | |
10582 | ("both %<_Sat%> and %<_Float%d%s%> in " | |
10583 | "declaration specifiers"), | |
10584 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10585 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10586 | ? "x" | |
10587 | : "")); | |
10588 | else if (FLOATN_NX_TYPE_NODE (specs->floatn_nx_idx) == NULL_TREE) | |
fe377a48 MP |
10589 | { |
10590 | specs->typespec_word = cts_floatn_nx; | |
10591 | error_at (loc, | |
10592 | "%<_Float%d%s%> is not supported on this target", | |
10593 | floatn_nx_types[specs->floatn_nx_idx].n, | |
10594 | (floatn_nx_types[specs->floatn_nx_idx].extended | |
10595 | ? "x" | |
10596 | : "")); | |
10597 | } | |
c65699ef JM |
10598 | else |
10599 | { | |
10600 | specs->typespec_word = cts_floatn_nx; | |
10601 | specs->locations[cdw_typespec] = loc; | |
10602 | } | |
10603 | return specs; | |
9a8ce21f JG |
10604 | case RID_DFLOAT32: |
10605 | case RID_DFLOAT64: | |
10606 | case RID_DFLOAT128: | |
b8698a0f | 10607 | { |
9a8ce21f JG |
10608 | const char *str; |
10609 | if (i == RID_DFLOAT32) | |
10610 | str = "_Decimal32"; | |
10611 | else if (i == RID_DFLOAT64) | |
10612 | str = "_Decimal64"; | |
10613 | else | |
10614 | str = "_Decimal128"; | |
10615 | if (specs->long_long_p) | |
dc491a25 | 10616 | error_at (loc, |
2f6f187a | 10617 | ("both %<long long%> and %qs in " |
dc491a25 ILT |
10618 | "declaration specifiers"), |
10619 | str); | |
9a8ce21f | 10620 | if (specs->long_p) |
dc491a25 | 10621 | error_at (loc, |
2f6f187a | 10622 | ("both %<long%> and %qs in " |
dc491a25 ILT |
10623 | "declaration specifiers"), |
10624 | str); | |
9a8ce21f | 10625 | else if (specs->short_p) |
dc491a25 | 10626 | error_at (loc, |
2f6f187a | 10627 | ("both %<short%> and %qs in " |
dc491a25 ILT |
10628 | "declaration specifiers"), |
10629 | str); | |
9a8ce21f | 10630 | else if (specs->signed_p) |
dc491a25 | 10631 | error_at (loc, |
2f6f187a | 10632 | ("both %<signed%> and %qs in " |
dc491a25 ILT |
10633 | "declaration specifiers"), |
10634 | str); | |
9a8ce21f | 10635 | else if (specs->unsigned_p) |
dc491a25 | 10636 | error_at (loc, |
2f6f187a | 10637 | ("both %<unsigned%> and %qs in " |
dc491a25 ILT |
10638 | "declaration specifiers"), |
10639 | str); | |
9a8ce21f | 10640 | else if (specs->complex_p) |
dc491a25 | 10641 | error_at (loc, |
2f6f187a | 10642 | ("both %<complex%> and %qs in " |
dc491a25 ILT |
10643 | "declaration specifiers"), |
10644 | str); | |
ab22c1fa | 10645 | else if (specs->saturating_p) |
dc491a25 | 10646 | error_at (loc, |
2f6f187a | 10647 | ("both %<_Sat%> and %qs in " |
dc491a25 ILT |
10648 | "declaration specifiers"), |
10649 | str); | |
9a8ce21f JG |
10650 | else if (i == RID_DFLOAT32) |
10651 | specs->typespec_word = cts_dfloat32; | |
10652 | else if (i == RID_DFLOAT64) | |
10653 | specs->typespec_word = cts_dfloat64; | |
10654 | else | |
10655 | specs->typespec_word = cts_dfloat128; | |
0b2c4be5 | 10656 | specs->locations[cdw_typespec] = loc; |
9a8ce21f JG |
10657 | } |
10658 | if (!targetm.decimal_float_supported_p ()) | |
dc491a25 ILT |
10659 | error_at (loc, |
10660 | ("decimal floating point not supported " | |
10661 | "for this target")); | |
c1771a20 | 10662 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 10663 | "ISO C does not support decimal floating point"); |
9a8ce21f | 10664 | return specs; |
ab22c1fa CF |
10665 | case RID_FRACT: |
10666 | case RID_ACCUM: | |
10667 | { | |
10668 | const char *str; | |
10669 | if (i == RID_FRACT) | |
10670 | str = "_Fract"; | |
10671 | else | |
10672 | str = "_Accum"; | |
10673 | if (specs->complex_p) | |
dc491a25 | 10674 | error_at (loc, |
2f6f187a | 10675 | ("both %<complex%> and %qs in " |
dc491a25 ILT |
10676 | "declaration specifiers"), |
10677 | str); | |
ab22c1fa CF |
10678 | else if (i == RID_FRACT) |
10679 | specs->typespec_word = cts_fract; | |
10680 | else | |
10681 | specs->typespec_word = cts_accum; | |
0b2c4be5 | 10682 | specs->locations[cdw_typespec] = loc; |
ab22c1fa CF |
10683 | } |
10684 | if (!targetm.fixed_point_supported_p ()) | |
dc491a25 ILT |
10685 | error_at (loc, |
10686 | "fixed-point types not supported for this target"); | |
c1771a20 | 10687 | pedwarn (loc, OPT_Wpedantic, |
fcf73884 | 10688 | "ISO C does not support fixed-point types"); |
ab22c1fa | 10689 | return specs; |
98c3a782 JM |
10690 | default: |
10691 | /* ObjC reserved word "id", handled below. */ | |
10692 | break; | |
10693 | } | |
10694 | } | |
deb176fa | 10695 | } |
98c3a782 JM |
10696 | |
10697 | /* Now we have a typedef (a TYPE_DECL node), an identifier (some | |
10698 | form of ObjC type, cases such as "int" and "long" being handled | |
10699 | above), a TYPE (struct, union, enum and typeof specifiers) or an | |
10700 | ERROR_MARK. In none of these cases may there have previously | |
10701 | been any type specifiers. */ | |
10702 | if (specs->type || specs->typespec_word != cts_none | |
10703 | || specs->long_p || specs->short_p || specs->signed_p | |
10704 | || specs->unsigned_p || specs->complex_p) | |
dc491a25 | 10705 | error_at (loc, "two or more data types in declaration specifiers"); |
deb176fa JM |
10706 | else if (TREE_CODE (type) == TYPE_DECL) |
10707 | { | |
10708 | if (TREE_TYPE (type) == error_mark_node) | |
10709 | ; /* Allow the type to default to int to avoid cascading errors. */ | |
10710 | else | |
10711 | { | |
10712 | specs->type = TREE_TYPE (type); | |
10713 | specs->decl_attr = DECL_ATTRIBUTES (type); | |
616aeba2 | 10714 | specs->typedef_p = true; |
98c3a782 | 10715 | specs->explicit_signed_p = C_TYPEDEF_EXPLICITLY_SIGNED (type); |
0b2c4be5 | 10716 | specs->locations[cdw_typedef] = loc; |
dc491a25 ILT |
10717 | |
10718 | /* If this typedef name is defined in a struct, then a C++ | |
10719 | lookup would return a different value. */ | |
10720 | if (warn_cxx_compat | |
10721 | && I_SYMBOL_BINDING (DECL_NAME (type))->in_struct) | |
10722 | warning_at (loc, OPT_Wc___compat, | |
10723 | "C++ lookup of %qD would return a field, not a type", | |
10724 | type); | |
10725 | ||
10726 | /* If we are parsing a struct, record that a struct field | |
10727 | used a typedef. */ | |
10728 | if (warn_cxx_compat && struct_parse_info != NULL) | |
9771b263 | 10729 | struct_parse_info->typedefs_seen.safe_push (type); |
deb176fa JM |
10730 | } |
10731 | } | |
deb176fa JM |
10732 | else if (TREE_CODE (type) == IDENTIFIER_NODE) |
10733 | { | |
10734 | tree t = lookup_name (type); | |
10735 | if (!t || TREE_CODE (t) != TYPE_DECL) | |
dc491a25 | 10736 | error_at (loc, "%qE fails to be a typedef or built in type", type); |
deb176fa JM |
10737 | else if (TREE_TYPE (t) == error_mark_node) |
10738 | ; | |
10739 | else | |
0b2c4be5 DS |
10740 | { |
10741 | specs->type = TREE_TYPE (t); | |
10742 | specs->locations[cdw_typespec] = loc; | |
10743 | } | |
deb176fa | 10744 | } |
29ce73cb | 10745 | else |
81da229b | 10746 | { |
29ce73cb | 10747 | if (TREE_CODE (type) != ERROR_MARK && spec.kind == ctsk_typeof) |
928c19bb JM |
10748 | { |
10749 | specs->typedef_p = true; | |
0b2c4be5 | 10750 | specs->locations[cdw_typedef] = loc; |
928c19bb JM |
10751 | if (spec.expr) |
10752 | { | |
10753 | if (specs->expr) | |
10754 | specs->expr = build2 (COMPOUND_EXPR, TREE_TYPE (spec.expr), | |
10755 | specs->expr, spec.expr); | |
10756 | else | |
10757 | specs->expr = spec.expr; | |
10758 | specs->expr_const_operands &= spec.expr_const_operands; | |
10759 | } | |
10760 | } | |
81da229b JM |
10761 | specs->type = type; |
10762 | } | |
deb176fa JM |
10763 | |
10764 | return specs; | |
10765 | } | |
10766 | ||
10767 | /* Add the storage class specifier or function specifier SCSPEC to the | |
10768 | declaration specifiers SPECS, returning SPECS. */ | |
10769 | ||
10770 | struct c_declspecs * | |
0b2c4be5 DS |
10771 | declspecs_add_scspec (source_location loc, |
10772 | struct c_declspecs *specs, | |
10773 | tree scspec) | |
deb176fa JM |
10774 | { |
10775 | enum rid i; | |
9a26d6ee JM |
10776 | enum c_storage_class n = csc_none; |
10777 | bool dupe = false; | |
27bf414c | 10778 | specs->declspecs_seen_p = true; |
deb176fa JM |
10779 | gcc_assert (TREE_CODE (scspec) == IDENTIFIER_NODE |
10780 | && C_IS_RESERVED_WORD (scspec)); | |
10781 | i = C_RID_CODE (scspec); | |
b1ed4cb4 | 10782 | if (specs->non_sc_seen_p) |
b8698a0f | 10783 | warning (OPT_Wold_style_declaration, |
b1ed4cb4 | 10784 | "%qE is not at beginning of declaration", scspec); |
9a26d6ee JM |
10785 | switch (i) |
10786 | { | |
10787 | case RID_INLINE: | |
61f4f1cc JM |
10788 | /* C99 permits duplicate inline. Although of doubtful utility, |
10789 | it seems simplest to permit it in gnu89 mode as well, as | |
10790 | there is also little utility in maintaining this as a | |
10791 | difference between gnu89 and C99 inline. */ | |
10792 | dupe = false; | |
9a26d6ee | 10793 | specs->inline_p = true; |
0b2c4be5 | 10794 | specs->locations[cdw_inline] = loc; |
9a26d6ee | 10795 | break; |
bbceee64 JM |
10796 | case RID_NORETURN: |
10797 | /* Duplicate _Noreturn is permitted. */ | |
10798 | dupe = false; | |
10799 | specs->noreturn_p = true; | |
0b2c4be5 | 10800 | specs->locations[cdw_noreturn] = loc; |
bbceee64 | 10801 | break; |
9a26d6ee JM |
10802 | case RID_THREAD: |
10803 | dupe = specs->thread_p; | |
10804 | if (specs->storage_class == csc_auto) | |
582d9b50 | 10805 | error ("%qE used with %<auto%>", scspec); |
9a26d6ee | 10806 | else if (specs->storage_class == csc_register) |
582d9b50 | 10807 | error ("%qE used with %<register%>", scspec); |
9a26d6ee | 10808 | else if (specs->storage_class == csc_typedef) |
582d9b50 | 10809 | error ("%qE used with %<typedef%>", scspec); |
9a26d6ee | 10810 | else |
0b2c4be5 DS |
10811 | { |
10812 | specs->thread_p = true; | |
582d9b50 JM |
10813 | specs->thread_gnu_p = (strcmp (IDENTIFIER_POINTER (scspec), |
10814 | "__thread") == 0); | |
10815 | /* A diagnostic is not required for the use of this | |
10816 | identifier in the implementation namespace; only diagnose | |
10817 | it for the C11 spelling because of existing code using | |
10818 | the other spelling. */ | |
35aff4fb | 10819 | if (!specs->thread_gnu_p) |
582d9b50 JM |
10820 | { |
10821 | if (flag_isoc99) | |
35aff4fb MP |
10822 | pedwarn_c99 (loc, OPT_Wpedantic, |
10823 | "ISO C99 does not support %qE", scspec); | |
582d9b50 | 10824 | else |
35aff4fb MP |
10825 | pedwarn_c99 (loc, OPT_Wpedantic, |
10826 | "ISO C90 does not support %qE", scspec); | |
582d9b50 | 10827 | } |
0b2c4be5 DS |
10828 | specs->locations[cdw_thread] = loc; |
10829 | } | |
9a26d6ee JM |
10830 | break; |
10831 | case RID_AUTO: | |
10832 | n = csc_auto; | |
10833 | break; | |
10834 | case RID_EXTERN: | |
10835 | n = csc_extern; | |
10836 | /* Diagnose "__thread extern". */ | |
582d9b50 | 10837 | if (specs->thread_p && specs->thread_gnu_p) |
deb176fa | 10838 | error ("%<__thread%> before %<extern%>"); |
9a26d6ee JM |
10839 | break; |
10840 | case RID_REGISTER: | |
10841 | n = csc_register; | |
10842 | break; | |
10843 | case RID_STATIC: | |
10844 | n = csc_static; | |
10845 | /* Diagnose "__thread static". */ | |
582d9b50 | 10846 | if (specs->thread_p && specs->thread_gnu_p) |
deb176fa | 10847 | error ("%<__thread%> before %<static%>"); |
9a26d6ee JM |
10848 | break; |
10849 | case RID_TYPEDEF: | |
10850 | n = csc_typedef; | |
10851 | break; | |
10852 | default: | |
10853 | gcc_unreachable (); | |
10854 | } | |
10855 | if (n != csc_none && n == specs->storage_class) | |
10856 | dupe = true; | |
10857 | if (dupe) | |
582d9b50 JM |
10858 | { |
10859 | if (i == RID_THREAD) | |
10860 | error ("duplicate %<_Thread_local%> or %<__thread%>"); | |
10861 | else | |
10862 | error ("duplicate %qE", scspec); | |
10863 | } | |
9a26d6ee JM |
10864 | if (n != csc_none) |
10865 | { | |
10866 | if (specs->storage_class != csc_none && n != specs->storage_class) | |
10867 | { | |
10868 | error ("multiple storage classes in declaration specifiers"); | |
10869 | } | |
10870 | else | |
10871 | { | |
10872 | specs->storage_class = n; | |
0b2c4be5 | 10873 | specs->locations[cdw_storage_class] = loc; |
9a26d6ee JM |
10874 | if (n != csc_extern && n != csc_static && specs->thread_p) |
10875 | { | |
582d9b50 JM |
10876 | error ("%qs used with %qE", |
10877 | specs->thread_gnu_p ? "__thread" : "_Thread_local", | |
10878 | scspec); | |
9a26d6ee JM |
10879 | specs->thread_p = false; |
10880 | } | |
10881 | } | |
deb176fa | 10882 | } |
deb176fa JM |
10883 | return specs; |
10884 | } | |
10885 | ||
10886 | /* Add the attributes ATTRS to the declaration specifiers SPECS, | |
10887 | returning SPECS. */ | |
10888 | ||
10889 | struct c_declspecs * | |
0b2c4be5 | 10890 | declspecs_add_attrs (source_location loc, struct c_declspecs *specs, tree attrs) |
deb176fa JM |
10891 | { |
10892 | specs->attrs = chainon (attrs, specs->attrs); | |
0b2c4be5 | 10893 | specs->locations[cdw_attributes] = loc; |
27bf414c | 10894 | specs->declspecs_seen_p = true; |
deb176fa JM |
10895 | return specs; |
10896 | } | |
10897 | ||
d19fa6b5 JM |
10898 | /* Add an _Alignas specifier (expression ALIGN, or type whose |
10899 | alignment is ALIGN) to the declaration specifiers SPECS, returning | |
10900 | SPECS. */ | |
10901 | struct c_declspecs * | |
0b2c4be5 DS |
10902 | declspecs_add_alignas (source_location loc, |
10903 | struct c_declspecs *specs, tree align) | |
d19fa6b5 JM |
10904 | { |
10905 | int align_log; | |
10906 | specs->alignas_p = true; | |
0b2c4be5 | 10907 | specs->locations[cdw_alignas] = loc; |
d19fa6b5 JM |
10908 | if (align == error_mark_node) |
10909 | return specs; | |
10910 | align_log = check_user_alignment (align, true); | |
10911 | if (align_log > specs->align_log) | |
10912 | specs->align_log = align_log; | |
10913 | return specs; | |
10914 | } | |
10915 | ||
98c3a782 JM |
10916 | /* Combine "long", "short", "signed", "unsigned" and "_Complex" type |
10917 | specifiers with any other type specifier to determine the resulting | |
10918 | type. This is where ISO C checks on complex types are made, since | |
10919 | "_Complex long" is a prefix of the valid ISO C type "_Complex long | |
10920 | double". */ | |
10921 | ||
10922 | struct c_declspecs * | |
10923 | finish_declspecs (struct c_declspecs *specs) | |
10924 | { | |
10925 | /* If a type was specified as a whole, we have no modifiers and are | |
10926 | done. */ | |
10927 | if (specs->type != NULL_TREE) | |
10928 | { | |
10929 | gcc_assert (!specs->long_p && !specs->long_long_p && !specs->short_p | |
10930 | && !specs->signed_p && !specs->unsigned_p | |
10931 | && !specs->complex_p); | |
29ce73cb PB |
10932 | |
10933 | /* Set a dummy type. */ | |
10934 | if (TREE_CODE (specs->type) == ERROR_MARK) | |
10935 | specs->type = integer_type_node; | |
98c3a782 JM |
10936 | return specs; |
10937 | } | |
10938 | ||
10939 | /* If none of "void", "_Bool", "char", "int", "float" or "double" | |
10940 | has been specified, treat it as "int" unless "_Complex" is | |
10941 | present and there are no other specifiers. If we just have | |
10942 | "_Complex", it is equivalent to "_Complex double", but e.g. | |
10943 | "_Complex short" is equivalent to "_Complex short int". */ | |
10944 | if (specs->typespec_word == cts_none) | |
10945 | { | |
ab22c1fa | 10946 | if (specs->saturating_p) |
819fec00 | 10947 | { |
0b2c4be5 DS |
10948 | error_at (specs->locations[cdw_saturating], |
10949 | "%<_Sat%> is used without %<_Fract%> or %<_Accum%>"); | |
754ccf7c | 10950 | if (!targetm.fixed_point_supported_p ()) |
0b2c4be5 DS |
10951 | error_at (specs->locations[cdw_saturating], |
10952 | "fixed-point types not supported for this target"); | |
819fec00 NS |
10953 | specs->typespec_word = cts_fract; |
10954 | } | |
10955 | else if (specs->long_p || specs->short_p | |
10956 | || specs->signed_p || specs->unsigned_p) | |
98c3a782 JM |
10957 | { |
10958 | specs->typespec_word = cts_int; | |
10959 | } | |
10960 | else if (specs->complex_p) | |
10961 | { | |
10962 | specs->typespec_word = cts_double; | |
0b2c4be5 | 10963 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 MLI |
10964 | "ISO C does not support plain %<complex%> meaning " |
10965 | "%<double complex%>"); | |
98c3a782 JM |
10966 | } |
10967 | else | |
10968 | { | |
10969 | specs->typespec_word = cts_int; | |
10970 | specs->default_int_p = true; | |
10971 | /* We don't diagnose this here because grokdeclarator will | |
10972 | give more specific diagnostics according to whether it is | |
10973 | a function definition. */ | |
10974 | } | |
10975 | } | |
10976 | ||
10977 | /* If "signed" was specified, record this to distinguish "int" and | |
10978 | "signed int" in the case of a bit-field with | |
10979 | -funsigned-bitfields. */ | |
10980 | specs->explicit_signed_p = specs->signed_p; | |
10981 | ||
10982 | /* Now compute the actual type. */ | |
10983 | switch (specs->typespec_word) | |
10984 | { | |
38b7bc7f JM |
10985 | case cts_auto_type: |
10986 | gcc_assert (!specs->long_p && !specs->short_p | |
10987 | && !specs->signed_p && !specs->unsigned_p | |
10988 | && !specs->complex_p); | |
10989 | /* Type to be filled in later. */ | |
10990 | break; | |
98c3a782 JM |
10991 | case cts_void: |
10992 | gcc_assert (!specs->long_p && !specs->short_p | |
10993 | && !specs->signed_p && !specs->unsigned_p | |
10994 | && !specs->complex_p); | |
10995 | specs->type = void_type_node; | |
10996 | break; | |
10997 | case cts_bool: | |
10998 | gcc_assert (!specs->long_p && !specs->short_p | |
10999 | && !specs->signed_p && !specs->unsigned_p | |
11000 | && !specs->complex_p); | |
11001 | specs->type = boolean_type_node; | |
11002 | break; | |
11003 | case cts_char: | |
11004 | gcc_assert (!specs->long_p && !specs->short_p); | |
11005 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
11006 | if (specs->signed_p) | |
11007 | specs->type = signed_char_type_node; | |
11008 | else if (specs->unsigned_p) | |
11009 | specs->type = unsigned_char_type_node; | |
11010 | else | |
11011 | specs->type = char_type_node; | |
11012 | if (specs->complex_p) | |
11013 | { | |
0b2c4be5 | 11014 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 | 11015 | "ISO C does not support complex integer types"); |
98c3a782 JM |
11016 | specs->type = build_complex_type (specs->type); |
11017 | } | |
11018 | break; | |
78a7c317 | 11019 | case cts_int_n: |
a6766312 KT |
11020 | gcc_assert (!specs->long_p && !specs->short_p && !specs->long_long_p); |
11021 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
666f7903 JJ |
11022 | if (! int_n_enabled_p[specs->int_n_idx]) |
11023 | specs->type = integer_type_node; | |
11024 | else | |
11025 | specs->type = (specs->unsigned_p | |
11026 | ? int_n_trees[specs->int_n_idx].unsigned_type | |
11027 | : int_n_trees[specs->int_n_idx].signed_type); | |
a6766312 KT |
11028 | if (specs->complex_p) |
11029 | { | |
0b2c4be5 | 11030 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
a6766312 KT |
11031 | "ISO C does not support complex integer types"); |
11032 | specs->type = build_complex_type (specs->type); | |
11033 | } | |
11034 | break; | |
98c3a782 JM |
11035 | case cts_int: |
11036 | gcc_assert (!(specs->long_p && specs->short_p)); | |
11037 | gcc_assert (!(specs->signed_p && specs->unsigned_p)); | |
11038 | if (specs->long_long_p) | |
11039 | specs->type = (specs->unsigned_p | |
11040 | ? long_long_unsigned_type_node | |
11041 | : long_long_integer_type_node); | |
11042 | else if (specs->long_p) | |
11043 | specs->type = (specs->unsigned_p | |
11044 | ? long_unsigned_type_node | |
11045 | : long_integer_type_node); | |
11046 | else if (specs->short_p) | |
11047 | specs->type = (specs->unsigned_p | |
11048 | ? short_unsigned_type_node | |
11049 | : short_integer_type_node); | |
11050 | else | |
11051 | specs->type = (specs->unsigned_p | |
11052 | ? unsigned_type_node | |
11053 | : integer_type_node); | |
11054 | if (specs->complex_p) | |
11055 | { | |
0b2c4be5 | 11056 | pedwarn (specs->locations[cdw_complex], OPT_Wpedantic, |
fcf73884 | 11057 | "ISO C does not support complex integer types"); |
98c3a782 JM |
11058 | specs->type = build_complex_type (specs->type); |
11059 | } | |
11060 | break; | |
11061 | case cts_float: | |
11062 | gcc_assert (!specs->long_p && !specs->short_p | |
11063 | && !specs->signed_p && !specs->unsigned_p); | |
11064 | specs->type = (specs->complex_p | |
11065 | ? complex_float_type_node | |
11066 | : float_type_node); | |
11067 | break; | |
11068 | case cts_double: | |
11069 | gcc_assert (!specs->long_long_p && !specs->short_p | |
11070 | && !specs->signed_p && !specs->unsigned_p); | |
11071 | if (specs->long_p) | |
11072 | { | |
11073 | specs->type = (specs->complex_p | |
11074 | ? complex_long_double_type_node | |
11075 | : long_double_type_node); | |
11076 | } | |
11077 | else | |
11078 | { | |
11079 | specs->type = (specs->complex_p | |
11080 | ? complex_double_type_node | |
11081 | : double_type_node); | |
11082 | } | |
11083 | break; | |
c65699ef JM |
11084 | case cts_floatn_nx: |
11085 | gcc_assert (!specs->long_p && !specs->short_p | |
11086 | && !specs->signed_p && !specs->unsigned_p); | |
fe377a48 MP |
11087 | if (FLOATN_NX_TYPE_NODE (specs->floatn_nx_idx) == NULL_TREE) |
11088 | specs->type = integer_type_node; | |
11089 | else if (specs->complex_p) | |
11090 | specs->type = COMPLEX_FLOATN_NX_TYPE_NODE (specs->floatn_nx_idx); | |
11091 | else | |
11092 | specs->type = FLOATN_NX_TYPE_NODE (specs->floatn_nx_idx); | |
c65699ef | 11093 | break; |
9a8ce21f JG |
11094 | case cts_dfloat32: |
11095 | case cts_dfloat64: | |
11096 | case cts_dfloat128: | |
11097 | gcc_assert (!specs->long_p && !specs->long_long_p && !specs->short_p | |
11098 | && !specs->signed_p && !specs->unsigned_p && !specs->complex_p); | |
11099 | if (specs->typespec_word == cts_dfloat32) | |
11100 | specs->type = dfloat32_type_node; | |
11101 | else if (specs->typespec_word == cts_dfloat64) | |
11102 | specs->type = dfloat64_type_node; | |
11103 | else | |
11104 | specs->type = dfloat128_type_node; | |
11105 | break; | |
ab22c1fa | 11106 | case cts_fract: |
754ccf7c JJ |
11107 | gcc_assert (!specs->complex_p); |
11108 | if (!targetm.fixed_point_supported_p ()) | |
11109 | specs->type = integer_type_node; | |
11110 | else if (specs->saturating_p) | |
ab22c1fa CF |
11111 | { |
11112 | if (specs->long_long_p) | |
11113 | specs->type = specs->unsigned_p | |
11114 | ? sat_unsigned_long_long_fract_type_node | |
11115 | : sat_long_long_fract_type_node; | |
11116 | else if (specs->long_p) | |
11117 | specs->type = specs->unsigned_p | |
11118 | ? sat_unsigned_long_fract_type_node | |
11119 | : sat_long_fract_type_node; | |
11120 | else if (specs->short_p) | |
11121 | specs->type = specs->unsigned_p | |
11122 | ? sat_unsigned_short_fract_type_node | |
11123 | : sat_short_fract_type_node; | |
11124 | else | |
11125 | specs->type = specs->unsigned_p | |
11126 | ? sat_unsigned_fract_type_node | |
11127 | : sat_fract_type_node; | |
754ccf7c | 11128 | } |
ab22c1fa CF |
11129 | else |
11130 | { | |
11131 | if (specs->long_long_p) | |
11132 | specs->type = specs->unsigned_p | |
11133 | ? unsigned_long_long_fract_type_node | |
11134 | : long_long_fract_type_node; | |
11135 | else if (specs->long_p) | |
11136 | specs->type = specs->unsigned_p | |
11137 | ? unsigned_long_fract_type_node | |
11138 | : long_fract_type_node; | |
11139 | else if (specs->short_p) | |
11140 | specs->type = specs->unsigned_p | |
11141 | ? unsigned_short_fract_type_node | |
11142 | : short_fract_type_node; | |
11143 | else | |
11144 | specs->type = specs->unsigned_p | |
11145 | ? unsigned_fract_type_node | |
11146 | : fract_type_node; | |
754ccf7c | 11147 | } |
ab22c1fa CF |
11148 | break; |
11149 | case cts_accum: | |
754ccf7c JJ |
11150 | gcc_assert (!specs->complex_p); |
11151 | if (!targetm.fixed_point_supported_p ()) | |
11152 | specs->type = integer_type_node; | |
11153 | else if (specs->saturating_p) | |
ab22c1fa CF |
11154 | { |
11155 | if (specs->long_long_p) | |
11156 | specs->type = specs->unsigned_p | |
11157 | ? sat_unsigned_long_long_accum_type_node | |
11158 | : sat_long_long_accum_type_node; | |
11159 | else if (specs->long_p) | |
11160 | specs->type = specs->unsigned_p | |
11161 | ? sat_unsigned_long_accum_type_node | |
11162 | : sat_long_accum_type_node; | |
11163 | else if (specs->short_p) | |
11164 | specs->type = specs->unsigned_p | |
11165 | ? sat_unsigned_short_accum_type_node | |
11166 | : sat_short_accum_type_node; | |
11167 | else | |
11168 | specs->type = specs->unsigned_p | |
11169 | ? sat_unsigned_accum_type_node | |
11170 | : sat_accum_type_node; | |
754ccf7c | 11171 | } |
ab22c1fa CF |
11172 | else |
11173 | { | |
11174 | if (specs->long_long_p) | |
11175 | specs->type = specs->unsigned_p | |
11176 | ? unsigned_long_long_accum_type_node | |
11177 | : long_long_accum_type_node; | |
11178 | else if (specs->long_p) | |
11179 | specs->type = specs->unsigned_p | |
11180 | ? unsigned_long_accum_type_node | |
11181 | : long_accum_type_node; | |
11182 | else if (specs->short_p) | |
11183 | specs->type = specs->unsigned_p | |
11184 | ? unsigned_short_accum_type_node | |
11185 | : short_accum_type_node; | |
11186 | else | |
11187 | specs->type = specs->unsigned_p | |
11188 | ? unsigned_accum_type_node | |
11189 | : accum_type_node; | |
754ccf7c | 11190 | } |
ab22c1fa | 11191 | break; |
98c3a782 JM |
11192 | default: |
11193 | gcc_unreachable (); | |
11194 | } | |
11195 | ||
11196 | return specs; | |
11197 | } | |
11198 | ||
d7438551 AH |
11199 | /* Perform final processing on one file scope's declarations (or the |
11200 | external scope's declarations), GLOBALS. */ | |
db5f8b93 | 11201 | |
f75fbaf7 ZW |
11202 | static void |
11203 | c_write_global_declarations_1 (tree globals) | |
d1bd0ded | 11204 | { |
d1bd0ded | 11205 | tree decl; |
df4b9cfe | 11206 | bool reconsider; |
118a3a8b | 11207 | |
f75fbaf7 | 11208 | /* Process the decls in the order they were written. */ |
910ad8de | 11209 | for (decl = globals; decl; decl = DECL_CHAIN (decl)) |
bc4b653b | 11210 | { |
bc4b653b JM |
11211 | /* Check for used but undefined static functions using the C |
11212 | standard's definition of "used", and set TREE_NO_WARNING so | |
d7438551 | 11213 | that check_global_declaration doesn't repeat the check. */ |
bc4b653b | 11214 | if (TREE_CODE (decl) == FUNCTION_DECL |
3fa8871b | 11215 | && DECL_INITIAL (decl) == NULL_TREE |
bc4b653b | 11216 | && DECL_EXTERNAL (decl) |
cbdd8ae0 | 11217 | && !TREE_PUBLIC (decl)) |
bc4b653b | 11218 | { |
cbdd8ae0 JJ |
11219 | if (C_DECL_USED (decl)) |
11220 | { | |
11221 | pedwarn (input_location, 0, "%q+F used but never defined", decl); | |
11222 | TREE_NO_WARNING (decl) = 1; | |
11223 | } | |
11224 | /* For -Wunused-function warn about unused static prototypes. */ | |
11225 | else if (warn_unused_function | |
11226 | && ! DECL_ARTIFICIAL (decl) | |
11227 | && ! TREE_NO_WARNING (decl)) | |
11228 | { | |
11229 | warning (OPT_Wunused_function, | |
11230 | "%q+F declared %<static%> but never defined", decl); | |
11231 | TREE_NO_WARNING (decl) = 1; | |
11232 | } | |
bc4b653b | 11233 | } |
db5f8b93 RH |
11234 | |
11235 | wrapup_global_declaration_1 (decl); | |
bc4b653b | 11236 | } |
df4b9cfe JJ |
11237 | |
11238 | do | |
11239 | { | |
11240 | reconsider = false; | |
910ad8de | 11241 | for (decl = globals; decl; decl = DECL_CHAIN (decl)) |
df4b9cfe JJ |
11242 | reconsider |= wrapup_global_declaration_2 (decl); |
11243 | } | |
11244 | while (reconsider); | |
d1bd0ded GK |
11245 | } |
11246 | ||
9cc54940 AC |
11247 | /* Callback to collect a source_ref from a DECL. */ |
11248 | ||
11249 | static void | |
11250 | collect_source_ref_cb (tree decl) | |
11251 | { | |
11252 | if (!DECL_IS_BUILTIN (decl)) | |
11253 | collect_source_ref (LOCATION_FILE (decl_sloc (decl, false))); | |
11254 | } | |
11255 | ||
86d71fca AC |
11256 | /* Preserve the external declarations scope across a garbage collect. */ |
11257 | static GTY(()) tree ext_block; | |
11258 | ||
9cc54940 AC |
11259 | /* Collect all references relevant to SOURCE_FILE. */ |
11260 | ||
11261 | static void | |
11262 | collect_all_refs (const char *source_file) | |
11263 | { | |
11264 | tree t; | |
6be14c0e | 11265 | unsigned i; |
9cc54940 | 11266 | |
9771b263 | 11267 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
9cc54940 | 11268 | collect_ada_nodes (BLOCK_VARS (DECL_INITIAL (t)), source_file); |
86d71fca AC |
11269 | |
11270 | collect_ada_nodes (BLOCK_VARS (ext_block), source_file); | |
9cc54940 AC |
11271 | } |
11272 | ||
11273 | /* Iterate over all global declarations and call CALLBACK. */ | |
11274 | ||
11275 | static void | |
11276 | for_each_global_decl (void (*callback) (tree decl)) | |
11277 | { | |
11278 | tree t; | |
11279 | tree decls; | |
11280 | tree decl; | |
6be14c0e | 11281 | unsigned i; |
9cc54940 | 11282 | |
9771b263 | 11283 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
9cc54940 AC |
11284 | { |
11285 | decls = DECL_INITIAL (t); | |
11286 | for (decl = BLOCK_VARS (decls); decl; decl = TREE_CHAIN (decl)) | |
11287 | callback (decl); | |
11288 | } | |
9cc54940 | 11289 | |
86d71fca AC |
11290 | for (decl = BLOCK_VARS (ext_block); decl; decl = TREE_CHAIN (decl)) |
11291 | callback (decl); | |
11292 | } | |
db5f8b93 | 11293 | |
d7438551 AH |
11294 | /* Perform any final parser cleanups and generate initial debugging |
11295 | information. */ | |
11296 | ||
d1bd0ded | 11297 | void |
d7438551 | 11298 | c_parse_final_cleanups (void) |
d1bd0ded | 11299 | { |
db5f8b93 | 11300 | tree t; |
6be14c0e | 11301 | unsigned i; |
e13e48e7 | 11302 | |
f75fbaf7 ZW |
11303 | /* We don't want to do this if generating a PCH. */ |
11304 | if (pch_file) | |
11305 | return; | |
d1bd0ded | 11306 | |
d7438551 | 11307 | timevar_stop (TV_PHASE_PARSING); |
575bfb00 LC |
11308 | timevar_start (TV_PHASE_DEFERRED); |
11309 | ||
977e30bc NP |
11310 | /* Do the Objective-C stuff. This is where all the Objective-C |
11311 | module stuff gets generated (symtab, class/protocol/selector | |
11312 | lists etc). */ | |
11313 | if (c_dialect_objc ()) | |
11314 | objc_write_global_declarations (); | |
11315 | ||
36c1b0de ZW |
11316 | /* Close the external scope. */ |
11317 | ext_block = pop_scope (); | |
11318 | external_scope = 0; | |
366de0ce | 11319 | gcc_assert (!current_scope); |
36c1b0de | 11320 | |
9cc54940 | 11321 | /* Handle -fdump-ada-spec[-slim]. */ |
3b78de56 | 11322 | if (flag_dump_ada_spec || flag_dump_ada_spec_slim) |
9cc54940 AC |
11323 | { |
11324 | /* Build a table of files to generate specs for */ | |
3b78de56 | 11325 | if (flag_dump_ada_spec_slim) |
9cc54940 AC |
11326 | collect_source_ref (main_input_filename); |
11327 | else | |
11328 | for_each_global_decl (collect_source_ref_cb); | |
11329 | ||
11330 | dump_ada_specs (collect_all_refs, NULL); | |
11331 | } | |
11332 | ||
db5f8b93 | 11333 | /* Process all file scopes in this compilation, and the external_scope, |
d7438551 | 11334 | through wrapup_global_declarations. */ |
9771b263 | 11335 | FOR_EACH_VEC_ELT (*all_translation_units, i, t) |
db5f8b93 | 11336 | c_write_global_declarations_1 (BLOCK_VARS (DECL_INITIAL (t))); |
36c1b0de ZW |
11337 | c_write_global_declarations_1 (BLOCK_VARS (ext_block)); |
11338 | ||
575bfb00 | 11339 | timevar_stop (TV_PHASE_DEFERRED); |
d7438551 | 11340 | timevar_start (TV_PHASE_PARSING); |
db5f8b93 RH |
11341 | |
11342 | ext_block = NULL; | |
d1bd0ded GK |
11343 | } |
11344 | ||
bffad7f1 SB |
11345 | /* Register reserved keyword WORD as qualifier for address space AS. */ |
11346 | ||
11347 | void | |
11348 | c_register_addr_space (const char *word, addr_space_t as) | |
11349 | { | |
11350 | int rid = RID_FIRST_ADDR_SPACE + as; | |
11351 | tree id; | |
11352 | ||
11353 | /* Address space qualifiers are only supported | |
11354 | in C with GNU extensions enabled. */ | |
11355 | if (c_dialect_objc () || flag_no_asm) | |
11356 | return; | |
11357 | ||
11358 | id = get_identifier (word); | |
11359 | C_SET_RID_CODE (id, rid); | |
11360 | C_IS_RESERVED_WORD (id) = 1; | |
11361 | ridpointers [rid] = id; | |
11362 | } | |
11363 | ||
acf0174b JJ |
11364 | /* Return identifier to look up for omp declare reduction. */ |
11365 | ||
11366 | tree | |
11367 | c_omp_reduction_id (enum tree_code reduction_code, tree reduction_id) | |
11368 | { | |
11369 | const char *p = NULL; | |
11370 | switch (reduction_code) | |
11371 | { | |
11372 | case PLUS_EXPR: p = "+"; break; | |
11373 | case MULT_EXPR: p = "*"; break; | |
11374 | case MINUS_EXPR: p = "-"; break; | |
11375 | case BIT_AND_EXPR: p = "&"; break; | |
11376 | case BIT_XOR_EXPR: p = "^"; break; | |
11377 | case BIT_IOR_EXPR: p = "|"; break; | |
11378 | case TRUTH_ANDIF_EXPR: p = "&&"; break; | |
11379 | case TRUTH_ORIF_EXPR: p = "||"; break; | |
11380 | case MIN_EXPR: p = "min"; break; | |
11381 | case MAX_EXPR: p = "max"; break; | |
11382 | default: | |
11383 | break; | |
11384 | } | |
11385 | ||
11386 | if (p == NULL) | |
11387 | { | |
11388 | if (TREE_CODE (reduction_id) != IDENTIFIER_NODE) | |
11389 | return error_mark_node; | |
11390 | p = IDENTIFIER_POINTER (reduction_id); | |
11391 | } | |
11392 | ||
11393 | const char prefix[] = "omp declare reduction "; | |
11394 | size_t lenp = sizeof (prefix); | |
11395 | size_t len = strlen (p); | |
11396 | char *name = XALLOCAVEC (char, lenp + len); | |
11397 | memcpy (name, prefix, lenp - 1); | |
11398 | memcpy (name + lenp - 1, p, len + 1); | |
11399 | return get_identifier (name); | |
11400 | } | |
11401 | ||
11402 | /* Lookup REDUCTION_ID in the current scope, or create an artificial | |
11403 | VAR_DECL, bind it into the current scope and return it. */ | |
11404 | ||
11405 | tree | |
11406 | c_omp_reduction_decl (tree reduction_id) | |
11407 | { | |
11408 | struct c_binding *b = I_SYMBOL_BINDING (reduction_id); | |
11409 | if (b != NULL && B_IN_CURRENT_SCOPE (b)) | |
11410 | return b->decl; | |
11411 | ||
11412 | tree decl = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
11413 | reduction_id, integer_type_node); | |
11414 | DECL_ARTIFICIAL (decl) = 1; | |
11415 | DECL_EXTERNAL (decl) = 1; | |
11416 | TREE_STATIC (decl) = 1; | |
11417 | TREE_PUBLIC (decl) = 0; | |
11418 | bind (reduction_id, decl, current_scope, true, false, BUILTINS_LOCATION); | |
11419 | return decl; | |
11420 | } | |
11421 | ||
11422 | /* Lookup REDUCTION_ID in the first scope where it has entry for TYPE. */ | |
11423 | ||
11424 | tree | |
11425 | c_omp_reduction_lookup (tree reduction_id, tree type) | |
11426 | { | |
11427 | struct c_binding *b = I_SYMBOL_BINDING (reduction_id); | |
11428 | while (b) | |
11429 | { | |
11430 | tree t; | |
11431 | for (t = DECL_INITIAL (b->decl); t; t = TREE_CHAIN (t)) | |
11432 | if (comptypes (TREE_PURPOSE (t), type)) | |
11433 | return TREE_VALUE (t); | |
11434 | b = b->shadowed; | |
11435 | } | |
11436 | return error_mark_node; | |
11437 | } | |
11438 | ||
11439 | /* Helper function called via walk_tree, to diagnose invalid | |
11440 | #pragma omp declare reduction combiners or initializers. */ | |
11441 | ||
11442 | tree | |
11443 | c_check_omp_declare_reduction_r (tree *tp, int *, void *data) | |
11444 | { | |
11445 | tree *vars = (tree *) data; | |
11446 | if (SSA_VAR_P (*tp) | |
11447 | && !DECL_ARTIFICIAL (*tp) | |
11448 | && *tp != vars[0] | |
11449 | && *tp != vars[1]) | |
11450 | { | |
11451 | location_t loc = DECL_SOURCE_LOCATION (vars[0]); | |
11452 | if (strcmp (IDENTIFIER_POINTER (DECL_NAME (vars[0])), "omp_out") == 0) | |
11453 | error_at (loc, "%<#pragma omp declare reduction%> combiner refers to " | |
11454 | "variable %qD which is not %<omp_out%> nor %<omp_in%>", | |
11455 | *tp); | |
11456 | else | |
11457 | error_at (loc, "%<#pragma omp declare reduction%> initializer refers " | |
11458 | "to variable %qD which is not %<omp_priv%> nor " | |
11459 | "%<omp_orig%>", | |
11460 | *tp); | |
11461 | return *tp; | |
11462 | } | |
11463 | return NULL_TREE; | |
11464 | } | |
11465 | ||
d4a10d0a | 11466 | #include "gt-c-c-decl.h" |