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27bf414c JM |
1 | /* Parser for C and Objective-C. |
2 | Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
ebfbbdc5 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010 |
5df27e4a | 4 | Free Software Foundation, Inc. |
27bf414c JM |
5 | |
6 | Parser actions based on the old Bison parser; structure somewhat | |
7 | influenced by and fragments based on the C++ parser. | |
8 | ||
9 | This file is part of GCC. | |
10 | ||
11 | GCC is free software; you can redistribute it and/or modify it under | |
12 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 13 | Software Foundation; either version 3, or (at your option) any later |
27bf414c JM |
14 | version. |
15 | ||
16 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
17 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
22 | along with GCC; see the file COPYING3. If not see |
23 | <http://www.gnu.org/licenses/>. */ | |
27bf414c JM |
24 | |
25 | /* TODO: | |
26 | ||
27 | Make sure all relevant comments, and all relevant code from all | |
28 | actions, brought over from old parser. Verify exact correspondence | |
29 | of syntax accepted. | |
30 | ||
31 | Add testcases covering every input symbol in every state in old and | |
32 | new parsers. | |
33 | ||
34 | Include full syntax for GNU C, including erroneous cases accepted | |
35 | with error messages, in syntax productions in comments. | |
36 | ||
37 | Make more diagnostics in the front end generally take an explicit | |
38 | location rather than implicitly using input_location. */ | |
39 | ||
40 | #include "config.h" | |
41 | #include "system.h" | |
42 | #include "coretypes.h" | |
f4ce02c5 | 43 | #include "tm.h" /* For rtl.h: needs enum reg_class. */ |
27bf414c JM |
44 | #include "tree.h" |
45 | #include "langhooks.h" | |
46 | #include "input.h" | |
47 | #include "cpplib.h" | |
48 | #include "timevar.h" | |
49 | #include "c-pragma.h" | |
50 | #include "c-tree.h" | |
51 | #include "flags.h" | |
52 | #include "output.h" | |
53 | #include "toplev.h" | |
54 | #include "ggc.h" | |
55 | #include "c-common.h" | |
bc4071dd RH |
56 | #include "vec.h" |
57 | #include "target.h" | |
474eccc6 | 58 | #include "cgraph.h" |
68a607d8 | 59 | #include "plugin.h" |
27bf414c JM |
60 | |
61 | \f | |
27bf414c JM |
62 | /* Initialization routine for this file. */ |
63 | ||
64 | void | |
65 | c_parse_init (void) | |
66 | { | |
67 | /* The only initialization required is of the reserved word | |
68 | identifiers. */ | |
69 | unsigned int i; | |
70 | tree id; | |
eea1139b | 71 | int mask = 0; |
27bf414c | 72 | |
36c5e70a BE |
73 | /* Make sure RID_MAX hasn't grown past the 8 bits used to hold the keyword in |
74 | the c_token structure. */ | |
75 | gcc_assert (RID_MAX <= 255); | |
76 | ||
eea1139b ILT |
77 | mask |= D_CXXONLY; |
78 | if (!flag_isoc99) | |
79 | mask |= D_C99; | |
80 | if (flag_no_asm) | |
81 | { | |
82 | mask |= D_ASM | D_EXT; | |
83 | if (!flag_isoc99) | |
84 | mask |= D_EXT89; | |
85 | } | |
27bf414c | 86 | if (!c_dialect_objc ()) |
eea1139b | 87 | mask |= D_OBJC | D_CXX_OBJC; |
27bf414c JM |
88 | |
89 | ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX); | |
eea1139b | 90 | for (i = 0; i < num_c_common_reswords; i++) |
27bf414c JM |
91 | { |
92 | /* If a keyword is disabled, do not enter it into the table | |
93 | and so create a canonical spelling that isn't a keyword. */ | |
eea1139b ILT |
94 | if (c_common_reswords[i].disable & mask) |
95 | { | |
96 | if (warn_cxx_compat | |
97 | && (c_common_reswords[i].disable & D_CXXWARN)) | |
98 | { | |
99 | id = get_identifier (c_common_reswords[i].word); | |
100 | C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN); | |
101 | C_IS_RESERVED_WORD (id) = 1; | |
102 | } | |
103 | continue; | |
104 | } | |
27bf414c | 105 | |
eea1139b ILT |
106 | id = get_identifier (c_common_reswords[i].word); |
107 | C_SET_RID_CODE (id, c_common_reswords[i].rid); | |
27bf414c | 108 | C_IS_RESERVED_WORD (id) = 1; |
eea1139b | 109 | ridpointers [(int) c_common_reswords[i].rid] = id; |
27bf414c JM |
110 | } |
111 | } | |
112 | \f | |
113 | /* The C lexer intermediates between the lexer in cpplib and c-lex.c | |
114 | and the C parser. Unlike the C++ lexer, the parser structure | |
115 | stores the lexer information instead of using a separate structure. | |
116 | Identifiers are separated into ordinary identifiers, type names, | |
117 | keywords and some other Objective-C types of identifiers, and some | |
118 | look-ahead is maintained. | |
119 | ||
120 | ??? It might be a good idea to lex the whole file up front (as for | |
121 | C++). It would then be possible to share more of the C and C++ | |
122 | lexer code, if desired. */ | |
123 | ||
124 | /* The following local token type is used. */ | |
125 | ||
126 | /* A keyword. */ | |
127 | #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1)) | |
128 | ||
27bf414c JM |
129 | /* More information about the type of a CPP_NAME token. */ |
130 | typedef enum c_id_kind { | |
131 | /* An ordinary identifier. */ | |
132 | C_ID_ID, | |
133 | /* An identifier declared as a typedef name. */ | |
134 | C_ID_TYPENAME, | |
135 | /* An identifier declared as an Objective-C class name. */ | |
136 | C_ID_CLASSNAME, | |
36c5e70a BE |
137 | /* An address space identifier. */ |
138 | C_ID_ADDRSPACE, | |
27bf414c JM |
139 | /* Not an identifier. */ |
140 | C_ID_NONE | |
141 | } c_id_kind; | |
142 | ||
143 | /* A single C token after string literal concatenation and conversion | |
144 | of preprocessing tokens to tokens. */ | |
d1b38208 | 145 | typedef struct GTY (()) c_token { |
27bf414c JM |
146 | /* The kind of token. */ |
147 | ENUM_BITFIELD (cpp_ttype) type : 8; | |
148 | /* If this token is a CPP_NAME, this value indicates whether also | |
149 | declared as some kind of type. Otherwise, it is C_ID_NONE. */ | |
150 | ENUM_BITFIELD (c_id_kind) id_kind : 8; | |
151 | /* If this token is a keyword, this value indicates which keyword. | |
152 | Otherwise, this value is RID_MAX. */ | |
153 | ENUM_BITFIELD (rid) keyword : 8; | |
bc4071dd RH |
154 | /* If this token is a CPP_PRAGMA, this indicates the pragma that |
155 | was seen. Otherwise it is PRAGMA_NONE. */ | |
13fa1171 | 156 | ENUM_BITFIELD (pragma_kind) pragma_kind : 8; |
27bf414c JM |
157 | /* The location at which this token was found. */ |
158 | location_t location; | |
8415f317 NF |
159 | /* The value associated with this token, if any. */ |
160 | tree value; | |
27bf414c JM |
161 | } c_token; |
162 | ||
163 | /* A parser structure recording information about the state and | |
164 | context of parsing. Includes lexer information with up to two | |
165 | tokens of look-ahead; more are not needed for C. */ | |
d1b38208 | 166 | typedef struct GTY(()) c_parser { |
27bf414c JM |
167 | /* The look-ahead tokens. */ |
168 | c_token tokens[2]; | |
169 | /* How many look-ahead tokens are available (0, 1 or 2). */ | |
170 | short tokens_avail; | |
171 | /* True if a syntax error is being recovered from; false otherwise. | |
172 | c_parser_error sets this flag. It should clear this flag when | |
173 | enough tokens have been consumed to recover from the error. */ | |
174 | BOOL_BITFIELD error : 1; | |
bc4071dd RH |
175 | /* True if we're processing a pragma, and shouldn't automatically |
176 | consume CPP_PRAGMA_EOL. */ | |
177 | BOOL_BITFIELD in_pragma : 1; | |
b4b56033 MLI |
178 | /* True if we're parsing the outermost block of an if statement. */ |
179 | BOOL_BITFIELD in_if_block : 1; | |
46c2514e TT |
180 | /* True if we want to lex an untranslated string. */ |
181 | BOOL_BITFIELD lex_untranslated_string : 1; | |
0bacb8c7 TT |
182 | /* Objective-C specific parser/lexer information. */ |
183 | BOOL_BITFIELD objc_pq_context : 1; | |
184 | /* The following flag is needed to contextualize Objective-C lexical | |
185 | analysis. In some cases (e.g., 'int NSObject;'), it is | |
186 | undesirable to bind an identifier to an Objective-C class, even | |
187 | if a class with that name exists. */ | |
188 | BOOL_BITFIELD objc_need_raw_identifier : 1; | |
27bf414c JM |
189 | } c_parser; |
190 | ||
bc4071dd RH |
191 | |
192 | /* The actual parser and external interface. ??? Does this need to be | |
193 | garbage-collected? */ | |
194 | ||
195 | static GTY (()) c_parser *the_parser; | |
196 | ||
197 | ||
27bf414c JM |
198 | /* Read in and lex a single token, storing it in *TOKEN. */ |
199 | ||
200 | static void | |
0bacb8c7 | 201 | c_lex_one_token (c_parser *parser, c_token *token) |
27bf414c JM |
202 | { |
203 | timevar_push (TV_LEX); | |
bc4071dd | 204 | |
46c2514e TT |
205 | token->type = c_lex_with_flags (&token->value, &token->location, NULL, |
206 | (parser->lex_untranslated_string | |
207 | ? C_LEX_STRING_NO_TRANSLATE : 0)); | |
bc4071dd RH |
208 | token->id_kind = C_ID_NONE; |
209 | token->keyword = RID_MAX; | |
210 | token->pragma_kind = PRAGMA_NONE; | |
bc4071dd | 211 | |
27bf414c JM |
212 | switch (token->type) |
213 | { | |
214 | case CPP_NAME: | |
27bf414c JM |
215 | { |
216 | tree decl; | |
217 | ||
0bacb8c7 TT |
218 | bool objc_force_identifier = parser->objc_need_raw_identifier; |
219 | if (c_dialect_objc ()) | |
220 | parser->objc_need_raw_identifier = false; | |
27bf414c JM |
221 | |
222 | if (C_IS_RESERVED_WORD (token->value)) | |
223 | { | |
224 | enum rid rid_code = C_RID_CODE (token->value); | |
225 | ||
eea1139b ILT |
226 | if (rid_code == RID_CXX_COMPAT_WARN) |
227 | { | |
3ba09659 AH |
228 | warning_at (token->location, |
229 | OPT_Wc___compat, | |
88388a52 JM |
230 | "identifier %qE conflicts with C++ keyword", |
231 | token->value); | |
eea1139b | 232 | } |
36c5e70a BE |
233 | else if (rid_code >= RID_FIRST_ADDR_SPACE |
234 | && rid_code <= RID_LAST_ADDR_SPACE) | |
235 | { | |
236 | token->id_kind = C_ID_ADDRSPACE; | |
237 | token->keyword = rid_code; | |
238 | break; | |
239 | } | |
eea1139b | 240 | else if (c_dialect_objc ()) |
27bf414c | 241 | { |
eea1139b | 242 | if (!objc_is_reserved_word (token->value) |
0bacb8c7 TT |
243 | && (!OBJC_IS_PQ_KEYWORD (rid_code) |
244 | || parser->objc_pq_context)) | |
27bf414c JM |
245 | { |
246 | /* Return the canonical spelling for this keyword. */ | |
247 | token->value = ridpointers[(int) rid_code]; | |
248 | token->type = CPP_KEYWORD; | |
249 | token->keyword = rid_code; | |
250 | break; | |
251 | } | |
252 | } | |
253 | else | |
254 | { | |
27bf414c JM |
255 | token->type = CPP_KEYWORD; |
256 | token->keyword = rid_code; | |
257 | break; | |
258 | } | |
259 | } | |
260 | ||
261 | decl = lookup_name (token->value); | |
262 | if (decl) | |
263 | { | |
264 | if (TREE_CODE (decl) == TYPE_DECL) | |
265 | { | |
266 | token->id_kind = C_ID_TYPENAME; | |
267 | break; | |
268 | } | |
269 | } | |
270 | else if (c_dialect_objc ()) | |
271 | { | |
272 | tree objc_interface_decl = objc_is_class_name (token->value); | |
273 | /* Objective-C class names are in the same namespace as | |
274 | variables and typedefs, and hence are shadowed by local | |
275 | declarations. */ | |
276 | if (objc_interface_decl | |
277 | && (global_bindings_p () | |
278 | || (!objc_force_identifier && !decl))) | |
279 | { | |
280 | token->value = objc_interface_decl; | |
281 | token->id_kind = C_ID_CLASSNAME; | |
282 | break; | |
283 | } | |
284 | } | |
bc4071dd | 285 | token->id_kind = C_ID_ID; |
27bf414c | 286 | } |
27bf414c JM |
287 | break; |
288 | case CPP_AT_NAME: | |
289 | /* This only happens in Objective-C; it must be a keyword. */ | |
290 | token->type = CPP_KEYWORD; | |
27bf414c JM |
291 | token->keyword = C_RID_CODE (token->value); |
292 | break; | |
293 | case CPP_COLON: | |
294 | case CPP_COMMA: | |
295 | case CPP_CLOSE_PAREN: | |
296 | case CPP_SEMICOLON: | |
297 | /* These tokens may affect the interpretation of any identifiers | |
298 | following, if doing Objective-C. */ | |
0bacb8c7 TT |
299 | if (c_dialect_objc ()) |
300 | parser->objc_need_raw_identifier = false; | |
bc4071dd RH |
301 | break; |
302 | case CPP_PRAGMA: | |
303 | /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */ | |
d75d71e0 | 304 | token->pragma_kind = (enum pragma_kind) TREE_INT_CST_LOW (token->value); |
bc4071dd | 305 | token->value = NULL; |
27bf414c JM |
306 | break; |
307 | default: | |
27bf414c JM |
308 | break; |
309 | } | |
310 | timevar_pop (TV_LEX); | |
311 | } | |
312 | ||
313 | /* Return a pointer to the next token from PARSER, reading it in if | |
314 | necessary. */ | |
315 | ||
316 | static inline c_token * | |
317 | c_parser_peek_token (c_parser *parser) | |
318 | { | |
319 | if (parser->tokens_avail == 0) | |
320 | { | |
0bacb8c7 | 321 | c_lex_one_token (parser, &parser->tokens[0]); |
27bf414c JM |
322 | parser->tokens_avail = 1; |
323 | } | |
324 | return &parser->tokens[0]; | |
325 | } | |
326 | ||
327 | /* Return true if the next token from PARSER has the indicated | |
328 | TYPE. */ | |
329 | ||
330 | static inline bool | |
331 | c_parser_next_token_is (c_parser *parser, enum cpp_ttype type) | |
332 | { | |
333 | return c_parser_peek_token (parser)->type == type; | |
334 | } | |
335 | ||
336 | /* Return true if the next token from PARSER does not have the | |
337 | indicated TYPE. */ | |
338 | ||
339 | static inline bool | |
340 | c_parser_next_token_is_not (c_parser *parser, enum cpp_ttype type) | |
341 | { | |
342 | return !c_parser_next_token_is (parser, type); | |
343 | } | |
344 | ||
345 | /* Return true if the next token from PARSER is the indicated | |
346 | KEYWORD. */ | |
347 | ||
348 | static inline bool | |
349 | c_parser_next_token_is_keyword (c_parser *parser, enum rid keyword) | |
350 | { | |
dbc518f0 | 351 | return c_parser_peek_token (parser)->keyword == keyword; |
27bf414c JM |
352 | } |
353 | ||
354 | /* Return true if TOKEN can start a type name, | |
355 | false otherwise. */ | |
356 | static bool | |
357 | c_token_starts_typename (c_token *token) | |
358 | { | |
359 | switch (token->type) | |
360 | { | |
361 | case CPP_NAME: | |
362 | switch (token->id_kind) | |
363 | { | |
364 | case C_ID_ID: | |
365 | return false; | |
36c5e70a BE |
366 | case C_ID_ADDRSPACE: |
367 | return true; | |
27bf414c JM |
368 | case C_ID_TYPENAME: |
369 | return true; | |
370 | case C_ID_CLASSNAME: | |
371 | gcc_assert (c_dialect_objc ()); | |
372 | return true; | |
373 | default: | |
374 | gcc_unreachable (); | |
375 | } | |
376 | case CPP_KEYWORD: | |
377 | switch (token->keyword) | |
378 | { | |
379 | case RID_UNSIGNED: | |
380 | case RID_LONG: | |
a6766312 | 381 | case RID_INT128: |
27bf414c JM |
382 | case RID_SHORT: |
383 | case RID_SIGNED: | |
384 | case RID_COMPLEX: | |
385 | case RID_INT: | |
386 | case RID_CHAR: | |
387 | case RID_FLOAT: | |
388 | case RID_DOUBLE: | |
389 | case RID_VOID: | |
9a8ce21f JG |
390 | case RID_DFLOAT32: |
391 | case RID_DFLOAT64: | |
392 | case RID_DFLOAT128: | |
27bf414c JM |
393 | case RID_BOOL: |
394 | case RID_ENUM: | |
395 | case RID_STRUCT: | |
396 | case RID_UNION: | |
397 | case RID_TYPEOF: | |
398 | case RID_CONST: | |
399 | case RID_VOLATILE: | |
400 | case RID_RESTRICT: | |
401 | case RID_ATTRIBUTE: | |
ab22c1fa CF |
402 | case RID_FRACT: |
403 | case RID_ACCUM: | |
404 | case RID_SAT: | |
27bf414c JM |
405 | return true; |
406 | default: | |
407 | return false; | |
408 | } | |
409 | case CPP_LESS: | |
410 | if (c_dialect_objc ()) | |
411 | return true; | |
412 | return false; | |
413 | default: | |
414 | return false; | |
415 | } | |
416 | } | |
417 | ||
418 | /* Return true if the next token from PARSER can start a type name, | |
419 | false otherwise. */ | |
420 | static inline bool | |
421 | c_parser_next_token_starts_typename (c_parser *parser) | |
422 | { | |
423 | c_token *token = c_parser_peek_token (parser); | |
424 | return c_token_starts_typename (token); | |
425 | } | |
426 | ||
427 | /* Return true if TOKEN can start declaration specifiers, false | |
428 | otherwise. */ | |
429 | static bool | |
430 | c_token_starts_declspecs (c_token *token) | |
431 | { | |
432 | switch (token->type) | |
433 | { | |
434 | case CPP_NAME: | |
435 | switch (token->id_kind) | |
436 | { | |
437 | case C_ID_ID: | |
438 | return false; | |
36c5e70a BE |
439 | case C_ID_ADDRSPACE: |
440 | return true; | |
27bf414c JM |
441 | case C_ID_TYPENAME: |
442 | return true; | |
443 | case C_ID_CLASSNAME: | |
444 | gcc_assert (c_dialect_objc ()); | |
445 | return true; | |
446 | default: | |
447 | gcc_unreachable (); | |
448 | } | |
449 | case CPP_KEYWORD: | |
450 | switch (token->keyword) | |
451 | { | |
452 | case RID_STATIC: | |
453 | case RID_EXTERN: | |
454 | case RID_REGISTER: | |
455 | case RID_TYPEDEF: | |
456 | case RID_INLINE: | |
457 | case RID_AUTO: | |
458 | case RID_THREAD: | |
459 | case RID_UNSIGNED: | |
460 | case RID_LONG: | |
a6766312 | 461 | case RID_INT128: |
27bf414c JM |
462 | case RID_SHORT: |
463 | case RID_SIGNED: | |
464 | case RID_COMPLEX: | |
465 | case RID_INT: | |
466 | case RID_CHAR: | |
467 | case RID_FLOAT: | |
468 | case RID_DOUBLE: | |
469 | case RID_VOID: | |
9a8ce21f JG |
470 | case RID_DFLOAT32: |
471 | case RID_DFLOAT64: | |
472 | case RID_DFLOAT128: | |
27bf414c JM |
473 | case RID_BOOL: |
474 | case RID_ENUM: | |
475 | case RID_STRUCT: | |
476 | case RID_UNION: | |
477 | case RID_TYPEOF: | |
478 | case RID_CONST: | |
479 | case RID_VOLATILE: | |
480 | case RID_RESTRICT: | |
481 | case RID_ATTRIBUTE: | |
ab22c1fa CF |
482 | case RID_FRACT: |
483 | case RID_ACCUM: | |
484 | case RID_SAT: | |
27bf414c JM |
485 | return true; |
486 | default: | |
487 | return false; | |
488 | } | |
489 | case CPP_LESS: | |
490 | if (c_dialect_objc ()) | |
491 | return true; | |
492 | return false; | |
493 | default: | |
494 | return false; | |
495 | } | |
496 | } | |
497 | ||
32912286 JM |
498 | |
499 | /* Return true if TOKEN can start declaration specifiers or a static | |
500 | assertion, false otherwise. */ | |
501 | static bool | |
502 | c_token_starts_declaration (c_token *token) | |
503 | { | |
504 | if (c_token_starts_declspecs (token) | |
505 | || token->keyword == RID_STATIC_ASSERT) | |
506 | return true; | |
507 | else | |
508 | return false; | |
509 | } | |
510 | ||
27bf414c JM |
511 | /* Return true if the next token from PARSER can start declaration |
512 | specifiers, false otherwise. */ | |
513 | static inline bool | |
514 | c_parser_next_token_starts_declspecs (c_parser *parser) | |
515 | { | |
516 | c_token *token = c_parser_peek_token (parser); | |
517 | return c_token_starts_declspecs (token); | |
518 | } | |
519 | ||
32912286 JM |
520 | /* Return true if the next token from PARSER can start declaration |
521 | specifiers or a static assertion, false otherwise. */ | |
522 | static inline bool | |
523 | c_parser_next_token_starts_declaration (c_parser *parser) | |
524 | { | |
525 | c_token *token = c_parser_peek_token (parser); | |
526 | return c_token_starts_declaration (token); | |
527 | } | |
528 | ||
27bf414c JM |
529 | /* Return a pointer to the next-but-one token from PARSER, reading it |
530 | in if necessary. The next token is already read in. */ | |
531 | ||
532 | static c_token * | |
533 | c_parser_peek_2nd_token (c_parser *parser) | |
534 | { | |
535 | if (parser->tokens_avail >= 2) | |
536 | return &parser->tokens[1]; | |
537 | gcc_assert (parser->tokens_avail == 1); | |
538 | gcc_assert (parser->tokens[0].type != CPP_EOF); | |
bc4071dd | 539 | gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL); |
0bacb8c7 | 540 | c_lex_one_token (parser, &parser->tokens[1]); |
27bf414c JM |
541 | parser->tokens_avail = 2; |
542 | return &parser->tokens[1]; | |
543 | } | |
544 | ||
545 | /* Consume the next token from PARSER. */ | |
546 | ||
547 | static void | |
548 | c_parser_consume_token (c_parser *parser) | |
549 | { | |
bc4071dd RH |
550 | gcc_assert (parser->tokens_avail >= 1); |
551 | gcc_assert (parser->tokens[0].type != CPP_EOF); | |
552 | gcc_assert (!parser->in_pragma || parser->tokens[0].type != CPP_PRAGMA_EOL); | |
553 | gcc_assert (parser->error || parser->tokens[0].type != CPP_PRAGMA); | |
27bf414c JM |
554 | if (parser->tokens_avail == 2) |
555 | parser->tokens[0] = parser->tokens[1]; | |
27bf414c JM |
556 | parser->tokens_avail--; |
557 | } | |
558 | ||
bc4071dd RH |
559 | /* Expect the current token to be a #pragma. Consume it and remember |
560 | that we've begun parsing a pragma. */ | |
561 | ||
562 | static void | |
563 | c_parser_consume_pragma (c_parser *parser) | |
564 | { | |
565 | gcc_assert (!parser->in_pragma); | |
566 | gcc_assert (parser->tokens_avail >= 1); | |
567 | gcc_assert (parser->tokens[0].type == CPP_PRAGMA); | |
568 | if (parser->tokens_avail == 2) | |
569 | parser->tokens[0] = parser->tokens[1]; | |
570 | parser->tokens_avail--; | |
571 | parser->in_pragma = true; | |
572 | } | |
573 | ||
27bf414c JM |
574 | /* Update the globals input_location and in_system_header from |
575 | TOKEN. */ | |
576 | static inline void | |
577 | c_parser_set_source_position_from_token (c_token *token) | |
578 | { | |
579 | if (token->type != CPP_EOF) | |
580 | { | |
581 | input_location = token->location; | |
27bf414c JM |
582 | } |
583 | } | |
584 | ||
27bf414c JM |
585 | /* Issue a diagnostic of the form |
586 | FILE:LINE: MESSAGE before TOKEN | |
587 | where TOKEN is the next token in the input stream of PARSER. | |
588 | MESSAGE (specified by the caller) is usually of the form "expected | |
589 | OTHER-TOKEN". | |
590 | ||
591 | Do not issue a diagnostic if still recovering from an error. | |
592 | ||
593 | ??? This is taken from the C++ parser, but building up messages in | |
594 | this way is not i18n-friendly and some other approach should be | |
595 | used. */ | |
596 | ||
597 | static void | |
4b794eaf | 598 | c_parser_error (c_parser *parser, const char *gmsgid) |
27bf414c JM |
599 | { |
600 | c_token *token = c_parser_peek_token (parser); | |
601 | if (parser->error) | |
602 | return; | |
603 | parser->error = true; | |
4b794eaf | 604 | if (!gmsgid) |
27bf414c JM |
605 | return; |
606 | /* This diagnostic makes more sense if it is tagged to the line of | |
607 | the token we just peeked at. */ | |
608 | c_parser_set_source_position_from_token (token); | |
4b794eaf | 609 | c_parse_error (gmsgid, |
27bf414c JM |
610 | /* Because c_parse_error does not understand |
611 | CPP_KEYWORD, keywords are treated like | |
612 | identifiers. */ | |
613 | (token->type == CPP_KEYWORD ? CPP_NAME : token->type), | |
cfc93532 MLI |
614 | /* ??? The C parser does not save the cpp flags of a |
615 | token, we need to pass 0 here and we will not get | |
616 | the source spelling of some tokens but rather the | |
617 | canonical spelling. */ | |
618 | token->value, /*flags=*/0); | |
27bf414c JM |
619 | } |
620 | ||
621 | /* If the next token is of the indicated TYPE, consume it. Otherwise, | |
622 | issue the error MSGID. If MSGID is NULL then a message has already | |
623 | been produced and no message will be produced this time. Returns | |
624 | true if found, false otherwise. */ | |
625 | ||
626 | static bool | |
627 | c_parser_require (c_parser *parser, | |
628 | enum cpp_ttype type, | |
629 | const char *msgid) | |
630 | { | |
631 | if (c_parser_next_token_is (parser, type)) | |
632 | { | |
633 | c_parser_consume_token (parser); | |
634 | return true; | |
635 | } | |
636 | else | |
637 | { | |
638 | c_parser_error (parser, msgid); | |
639 | return false; | |
640 | } | |
641 | } | |
642 | ||
643 | /* If the next token is the indicated keyword, consume it. Otherwise, | |
644 | issue the error MSGID. Returns true if found, false otherwise. */ | |
645 | ||
646 | static bool | |
647 | c_parser_require_keyword (c_parser *parser, | |
648 | enum rid keyword, | |
649 | const char *msgid) | |
650 | { | |
651 | if (c_parser_next_token_is_keyword (parser, keyword)) | |
652 | { | |
653 | c_parser_consume_token (parser); | |
654 | return true; | |
655 | } | |
656 | else | |
657 | { | |
658 | c_parser_error (parser, msgid); | |
659 | return false; | |
660 | } | |
661 | } | |
662 | ||
663 | /* Like c_parser_require, except that tokens will be skipped until the | |
664 | desired token is found. An error message is still produced if the | |
665 | next token is not as expected. If MSGID is NULL then a message has | |
666 | already been produced and no message will be produced this | |
667 | time. */ | |
668 | ||
669 | static void | |
670 | c_parser_skip_until_found (c_parser *parser, | |
671 | enum cpp_ttype type, | |
672 | const char *msgid) | |
673 | { | |
674 | unsigned nesting_depth = 0; | |
675 | ||
676 | if (c_parser_require (parser, type, msgid)) | |
677 | return; | |
678 | ||
679 | /* Skip tokens until the desired token is found. */ | |
680 | while (true) | |
681 | { | |
682 | /* Peek at the next token. */ | |
683 | c_token *token = c_parser_peek_token (parser); | |
684 | /* If we've reached the token we want, consume it and stop. */ | |
685 | if (token->type == type && !nesting_depth) | |
686 | { | |
687 | c_parser_consume_token (parser); | |
688 | break; | |
689 | } | |
bc4071dd | 690 | |
27bf414c JM |
691 | /* If we've run out of tokens, stop. */ |
692 | if (token->type == CPP_EOF) | |
693 | return; | |
bc4071dd RH |
694 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
695 | return; | |
27bf414c JM |
696 | if (token->type == CPP_OPEN_BRACE |
697 | || token->type == CPP_OPEN_PAREN | |
698 | || token->type == CPP_OPEN_SQUARE) | |
699 | ++nesting_depth; | |
700 | else if (token->type == CPP_CLOSE_BRACE | |
701 | || token->type == CPP_CLOSE_PAREN | |
702 | || token->type == CPP_CLOSE_SQUARE) | |
703 | { | |
704 | if (nesting_depth-- == 0) | |
705 | break; | |
706 | } | |
707 | /* Consume this token. */ | |
708 | c_parser_consume_token (parser); | |
709 | } | |
710 | parser->error = false; | |
711 | } | |
712 | ||
713 | /* Skip tokens until the end of a parameter is found, but do not | |
714 | consume the comma, semicolon or closing delimiter. */ | |
715 | ||
716 | static void | |
717 | c_parser_skip_to_end_of_parameter (c_parser *parser) | |
718 | { | |
719 | unsigned nesting_depth = 0; | |
720 | ||
721 | while (true) | |
722 | { | |
723 | c_token *token = c_parser_peek_token (parser); | |
724 | if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON) | |
725 | && !nesting_depth) | |
726 | break; | |
727 | /* If we've run out of tokens, stop. */ | |
728 | if (token->type == CPP_EOF) | |
729 | return; | |
bc4071dd RH |
730 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
731 | return; | |
27bf414c JM |
732 | if (token->type == CPP_OPEN_BRACE |
733 | || token->type == CPP_OPEN_PAREN | |
734 | || token->type == CPP_OPEN_SQUARE) | |
735 | ++nesting_depth; | |
736 | else if (token->type == CPP_CLOSE_BRACE | |
737 | || token->type == CPP_CLOSE_PAREN | |
738 | || token->type == CPP_CLOSE_SQUARE) | |
739 | { | |
740 | if (nesting_depth-- == 0) | |
741 | break; | |
742 | } | |
743 | /* Consume this token. */ | |
744 | c_parser_consume_token (parser); | |
745 | } | |
746 | parser->error = false; | |
747 | } | |
748 | ||
bc4071dd RH |
749 | /* Expect to be at the end of the pragma directive and consume an |
750 | end of line marker. */ | |
751 | ||
752 | static void | |
753 | c_parser_skip_to_pragma_eol (c_parser *parser) | |
754 | { | |
755 | gcc_assert (parser->in_pragma); | |
756 | parser->in_pragma = false; | |
757 | ||
758 | if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line")) | |
759 | while (true) | |
760 | { | |
761 | c_token *token = c_parser_peek_token (parser); | |
762 | if (token->type == CPP_EOF) | |
763 | break; | |
764 | if (token->type == CPP_PRAGMA_EOL) | |
765 | { | |
766 | c_parser_consume_token (parser); | |
767 | break; | |
768 | } | |
769 | c_parser_consume_token (parser); | |
770 | } | |
771 | ||
772 | parser->error = false; | |
773 | } | |
27bf414c | 774 | |
2a83cc52 RH |
775 | /* Skip tokens until we have consumed an entire block, or until we |
776 | have consumed a non-nested ';'. */ | |
777 | ||
778 | static void | |
779 | c_parser_skip_to_end_of_block_or_statement (c_parser *parser) | |
780 | { | |
781 | unsigned nesting_depth = 0; | |
782 | bool save_error = parser->error; | |
783 | ||
784 | while (true) | |
785 | { | |
786 | c_token *token; | |
787 | ||
788 | /* Peek at the next token. */ | |
789 | token = c_parser_peek_token (parser); | |
790 | ||
791 | switch (token->type) | |
792 | { | |
793 | case CPP_EOF: | |
794 | return; | |
795 | ||
796 | case CPP_PRAGMA_EOL: | |
797 | if (parser->in_pragma) | |
798 | return; | |
799 | break; | |
800 | ||
801 | case CPP_SEMICOLON: | |
802 | /* If the next token is a ';', we have reached the | |
803 | end of the statement. */ | |
804 | if (!nesting_depth) | |
805 | { | |
806 | /* Consume the ';'. */ | |
807 | c_parser_consume_token (parser); | |
808 | goto finished; | |
809 | } | |
810 | break; | |
811 | ||
812 | case CPP_CLOSE_BRACE: | |
813 | /* If the next token is a non-nested '}', then we have | |
814 | reached the end of the current block. */ | |
815 | if (nesting_depth == 0 || --nesting_depth == 0) | |
816 | { | |
817 | c_parser_consume_token (parser); | |
818 | goto finished; | |
819 | } | |
820 | break; | |
821 | ||
822 | case CPP_OPEN_BRACE: | |
823 | /* If it the next token is a '{', then we are entering a new | |
824 | block. Consume the entire block. */ | |
825 | ++nesting_depth; | |
826 | break; | |
827 | ||
828 | case CPP_PRAGMA: | |
829 | /* If we see a pragma, consume the whole thing at once. We | |
830 | have some safeguards against consuming pragmas willy-nilly. | |
831 | Normally, we'd expect to be here with parser->error set, | |
832 | which disables these safeguards. But it's possible to get | |
833 | here for secondary error recovery, after parser->error has | |
834 | been cleared. */ | |
835 | c_parser_consume_pragma (parser); | |
836 | c_parser_skip_to_pragma_eol (parser); | |
837 | parser->error = save_error; | |
838 | continue; | |
9e33de05 RS |
839 | |
840 | default: | |
841 | break; | |
2a83cc52 RH |
842 | } |
843 | ||
844 | c_parser_consume_token (parser); | |
845 | } | |
846 | ||
847 | finished: | |
848 | parser->error = false; | |
849 | } | |
850 | ||
d2e796ad MLI |
851 | /* CPP's options (initialized by c-opts.c). */ |
852 | extern cpp_options *cpp_opts; | |
853 | ||
27bf414c JM |
854 | /* Save the warning flags which are controlled by __extension__. */ |
855 | ||
856 | static inline int | |
857 | disable_extension_diagnostics (void) | |
858 | { | |
859 | int ret = (pedantic | |
860 | | (warn_pointer_arith << 1) | |
861 | | (warn_traditional << 2) | |
d2e796ad | 862 | | (flag_iso << 3) |
24b97832 ILT |
863 | | (warn_long_long << 4) |
864 | | (warn_cxx_compat << 5)); | |
d2e796ad | 865 | cpp_opts->pedantic = pedantic = 0; |
27bf414c | 866 | warn_pointer_arith = 0; |
d2e796ad | 867 | cpp_opts->warn_traditional = warn_traditional = 0; |
27bf414c | 868 | flag_iso = 0; |
9c650d90 | 869 | cpp_opts->warn_long_long = warn_long_long = 0; |
24b97832 | 870 | warn_cxx_compat = 0; |
27bf414c JM |
871 | return ret; |
872 | } | |
873 | ||
874 | /* Restore the warning flags which are controlled by __extension__. | |
875 | FLAGS is the return value from disable_extension_diagnostics. */ | |
876 | ||
877 | static inline void | |
878 | restore_extension_diagnostics (int flags) | |
879 | { | |
d2e796ad | 880 | cpp_opts->pedantic = pedantic = flags & 1; |
27bf414c | 881 | warn_pointer_arith = (flags >> 1) & 1; |
d2e796ad | 882 | cpp_opts->warn_traditional = warn_traditional = (flags >> 2) & 1; |
27bf414c | 883 | flag_iso = (flags >> 3) & 1; |
9c650d90 | 884 | cpp_opts->warn_long_long = warn_long_long = (flags >> 4) & 1; |
24b97832 | 885 | warn_cxx_compat = (flags >> 5) & 1; |
27bf414c JM |
886 | } |
887 | ||
888 | /* Possibly kinds of declarator to parse. */ | |
889 | typedef enum c_dtr_syn { | |
890 | /* A normal declarator with an identifier. */ | |
891 | C_DTR_NORMAL, | |
892 | /* An abstract declarator (maybe empty). */ | |
893 | C_DTR_ABSTRACT, | |
894 | /* A parameter declarator: may be either, but after a type name does | |
895 | not redeclare a typedef name as an identifier if it can | |
896 | alternatively be interpreted as a typedef name; see DR#009, | |
897 | applied in C90 TC1, omitted from C99 and reapplied in C99 TC2 | |
898 | following DR#249. For example, given a typedef T, "int T" and | |
899 | "int *T" are valid parameter declarations redeclaring T, while | |
900 | "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are | |
901 | abstract declarators rather than involving redundant parentheses; | |
902 | the same applies with attributes inside the parentheses before | |
903 | "T". */ | |
904 | C_DTR_PARM | |
905 | } c_dtr_syn; | |
906 | ||
907 | static void c_parser_external_declaration (c_parser *); | |
908 | static void c_parser_asm_definition (c_parser *); | |
32912286 JM |
909 | static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool, |
910 | bool, bool); | |
911 | static void c_parser_static_assert_declaration_no_semi (c_parser *); | |
912 | static void c_parser_static_assert_declaration (c_parser *); | |
27bf414c JM |
913 | static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool, |
914 | bool); | |
915 | static struct c_typespec c_parser_enum_specifier (c_parser *); | |
916 | static struct c_typespec c_parser_struct_or_union_specifier (c_parser *); | |
917 | static tree c_parser_struct_declaration (c_parser *); | |
918 | static struct c_typespec c_parser_typeof_specifier (c_parser *); | |
919 | static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn, | |
920 | bool *); | |
921 | static struct c_declarator *c_parser_direct_declarator (c_parser *, bool, | |
922 | c_dtr_syn, bool *); | |
923 | static struct c_declarator *c_parser_direct_declarator_inner (c_parser *, | |
924 | bool, | |
925 | struct c_declarator *); | |
926 | static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree); | |
927 | static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree); | |
928 | static struct c_parm *c_parser_parameter_declaration (c_parser *, tree); | |
929 | static tree c_parser_simple_asm_expr (c_parser *); | |
930 | static tree c_parser_attributes (c_parser *); | |
931 | static struct c_type_name *c_parser_type_name (c_parser *); | |
932 | static struct c_expr c_parser_initializer (c_parser *); | |
933 | static struct c_expr c_parser_braced_init (c_parser *, tree, bool); | |
a1e3b3d9 LB |
934 | static void c_parser_initelt (c_parser *, struct obstack *); |
935 | static void c_parser_initval (c_parser *, struct c_expr *, | |
936 | struct obstack *); | |
27bf414c JM |
937 | static tree c_parser_compound_statement (c_parser *); |
938 | static void c_parser_compound_statement_nostart (c_parser *); | |
939 | static void c_parser_label (c_parser *); | |
940 | static void c_parser_statement (c_parser *); | |
941 | static void c_parser_statement_after_labels (c_parser *); | |
942 | static void c_parser_if_statement (c_parser *); | |
943 | static void c_parser_switch_statement (c_parser *); | |
944 | static void c_parser_while_statement (c_parser *); | |
945 | static void c_parser_do_statement (c_parser *); | |
946 | static void c_parser_for_statement (c_parser *); | |
947 | static tree c_parser_asm_statement (c_parser *); | |
46bdb9cf | 948 | static tree c_parser_asm_operands (c_parser *, bool); |
1c384bf1 | 949 | static tree c_parser_asm_goto_operands (c_parser *); |
27bf414c JM |
950 | static tree c_parser_asm_clobbers (c_parser *); |
951 | static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *); | |
952 | static struct c_expr c_parser_conditional_expression (c_parser *, | |
953 | struct c_expr *); | |
954 | static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *); | |
955 | static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *); | |
956 | static struct c_expr c_parser_unary_expression (c_parser *); | |
957 | static struct c_expr c_parser_sizeof_expression (c_parser *); | |
958 | static struct c_expr c_parser_alignof_expression (c_parser *); | |
959 | static struct c_expr c_parser_postfix_expression (c_parser *); | |
960 | static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *, | |
24b97832 ILT |
961 | struct c_type_name *, |
962 | location_t); | |
27bf414c | 963 | static struct c_expr c_parser_postfix_expression_after_primary (c_parser *, |
c2255bc4 | 964 | location_t loc, |
27bf414c JM |
965 | struct c_expr); |
966 | static struct c_expr c_parser_expression (c_parser *); | |
46bdb9cf | 967 | static struct c_expr c_parser_expression_conv (c_parser *); |
bbbbb16a ILT |
968 | static VEC(tree,gc) *c_parser_expr_list (c_parser *, bool, bool, |
969 | VEC(tree,gc) **); | |
953ff289 DN |
970 | static void c_parser_omp_construct (c_parser *); |
971 | static void c_parser_omp_threadprivate (c_parser *); | |
972 | static void c_parser_omp_barrier (c_parser *); | |
973 | static void c_parser_omp_flush (c_parser *); | |
a68ab351 | 974 | static void c_parser_omp_taskwait (c_parser *); |
27bf414c | 975 | |
bc4071dd RH |
976 | enum pragma_context { pragma_external, pragma_stmt, pragma_compound }; |
977 | static bool c_parser_pragma (c_parser *, enum pragma_context); | |
978 | ||
27bf414c JM |
979 | /* These Objective-C parser functions are only ever called when |
980 | compiling Objective-C. */ | |
981 | static void c_parser_objc_class_definition (c_parser *); | |
982 | static void c_parser_objc_class_instance_variables (c_parser *); | |
983 | static void c_parser_objc_class_declaration (c_parser *); | |
984 | static void c_parser_objc_alias_declaration (c_parser *); | |
985 | static void c_parser_objc_protocol_definition (c_parser *); | |
986 | static enum tree_code c_parser_objc_method_type (c_parser *); | |
987 | static void c_parser_objc_method_definition (c_parser *); | |
988 | static void c_parser_objc_methodprotolist (c_parser *); | |
989 | static void c_parser_objc_methodproto (c_parser *); | |
990 | static tree c_parser_objc_method_decl (c_parser *); | |
991 | static tree c_parser_objc_type_name (c_parser *); | |
992 | static tree c_parser_objc_protocol_refs (c_parser *); | |
993 | static void c_parser_objc_try_catch_statement (c_parser *); | |
994 | static void c_parser_objc_synchronized_statement (c_parser *); | |
995 | static tree c_parser_objc_selector (c_parser *); | |
996 | static tree c_parser_objc_selector_arg (c_parser *); | |
997 | static tree c_parser_objc_receiver (c_parser *); | |
998 | static tree c_parser_objc_message_args (c_parser *); | |
999 | static tree c_parser_objc_keywordexpr (c_parser *); | |
1000 | ||
1001 | /* Parse a translation unit (C90 6.7, C99 6.9). | |
1002 | ||
1003 | translation-unit: | |
1004 | external-declarations | |
1005 | ||
1006 | external-declarations: | |
1007 | external-declaration | |
1008 | external-declarations external-declaration | |
1009 | ||
1010 | GNU extensions: | |
1011 | ||
1012 | translation-unit: | |
1013 | empty | |
1014 | */ | |
1015 | ||
1016 | static void | |
1017 | c_parser_translation_unit (c_parser *parser) | |
1018 | { | |
1019 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
1020 | { | |
b8698a0f | 1021 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
509c9d60 | 1022 | "ISO C forbids an empty translation unit"); |
27bf414c JM |
1023 | } |
1024 | else | |
1025 | { | |
1026 | void *obstack_position = obstack_alloc (&parser_obstack, 0); | |
6ec637a4 | 1027 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
1028 | do |
1029 | { | |
1030 | ggc_collect (); | |
1031 | c_parser_external_declaration (parser); | |
1032 | obstack_free (&parser_obstack, obstack_position); | |
1033 | } | |
1034 | while (c_parser_next_token_is_not (parser, CPP_EOF)); | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | /* Parse an external declaration (C90 6.7, C99 6.9). | |
1039 | ||
1040 | external-declaration: | |
1041 | function-definition | |
1042 | declaration | |
1043 | ||
1044 | GNU extensions: | |
1045 | ||
1046 | external-declaration: | |
1047 | asm-definition | |
1048 | ; | |
1049 | __extension__ external-declaration | |
1050 | ||
1051 | Objective-C: | |
1052 | ||
1053 | external-declaration: | |
1054 | objc-class-definition | |
1055 | objc-class-declaration | |
1056 | objc-alias-declaration | |
1057 | objc-protocol-definition | |
1058 | objc-method-definition | |
1059 | @end | |
1060 | */ | |
1061 | ||
1062 | static void | |
1063 | c_parser_external_declaration (c_parser *parser) | |
1064 | { | |
1065 | int ext; | |
1066 | switch (c_parser_peek_token (parser)->type) | |
1067 | { | |
1068 | case CPP_KEYWORD: | |
1069 | switch (c_parser_peek_token (parser)->keyword) | |
1070 | { | |
1071 | case RID_EXTENSION: | |
1072 | ext = disable_extension_diagnostics (); | |
1073 | c_parser_consume_token (parser); | |
1074 | c_parser_external_declaration (parser); | |
1075 | restore_extension_diagnostics (ext); | |
1076 | break; | |
1077 | case RID_ASM: | |
1078 | c_parser_asm_definition (parser); | |
1079 | break; | |
1080 | case RID_AT_INTERFACE: | |
1081 | case RID_AT_IMPLEMENTATION: | |
1082 | gcc_assert (c_dialect_objc ()); | |
1083 | c_parser_objc_class_definition (parser); | |
1084 | break; | |
eea1139b | 1085 | case RID_CLASS: |
27bf414c JM |
1086 | gcc_assert (c_dialect_objc ()); |
1087 | c_parser_objc_class_declaration (parser); | |
1088 | break; | |
1089 | case RID_AT_ALIAS: | |
1090 | gcc_assert (c_dialect_objc ()); | |
1091 | c_parser_objc_alias_declaration (parser); | |
1092 | break; | |
1093 | case RID_AT_PROTOCOL: | |
1094 | gcc_assert (c_dialect_objc ()); | |
1095 | c_parser_objc_protocol_definition (parser); | |
1096 | break; | |
1097 | case RID_AT_END: | |
1098 | gcc_assert (c_dialect_objc ()); | |
1099 | c_parser_consume_token (parser); | |
1100 | objc_finish_implementation (); | |
1101 | break; | |
1102 | default: | |
1103 | goto decl_or_fndef; | |
1104 | } | |
1105 | break; | |
1106 | case CPP_SEMICOLON: | |
b8698a0f | 1107 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
509c9d60 | 1108 | "ISO C does not allow extra %<;%> outside of a function"); |
27bf414c JM |
1109 | c_parser_consume_token (parser); |
1110 | break; | |
bc4071dd | 1111 | case CPP_PRAGMA: |
6ec637a4 | 1112 | mark_valid_location_for_stdc_pragma (true); |
bc4071dd | 1113 | c_parser_pragma (parser, pragma_external); |
6ec637a4 | 1114 | mark_valid_location_for_stdc_pragma (false); |
bc4071dd | 1115 | break; |
27bf414c JM |
1116 | case CPP_PLUS: |
1117 | case CPP_MINUS: | |
1118 | if (c_dialect_objc ()) | |
1119 | { | |
1120 | c_parser_objc_method_definition (parser); | |
1121 | break; | |
1122 | } | |
1123 | /* Else fall through, and yield a syntax error trying to parse | |
1124 | as a declaration or function definition. */ | |
1125 | default: | |
1126 | decl_or_fndef: | |
1127 | /* A declaration or a function definition. We can only tell | |
1128 | which after parsing the declaration specifiers, if any, and | |
1129 | the first declarator. */ | |
32912286 | 1130 | c_parser_declaration_or_fndef (parser, true, true, true, false, true); |
27bf414c JM |
1131 | break; |
1132 | } | |
1133 | } | |
1134 | ||
bc4071dd | 1135 | |
27bf414c JM |
1136 | /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99 |
1137 | 6.7, 6.9.1). If FNDEF_OK is true, a function definition is | |
1138 | accepted; otherwise (old-style parameter declarations) only other | |
32912286 JM |
1139 | declarations are accepted. If STATIC_ASSERT_OK is true, a static |
1140 | assertion is accepted; otherwise (old-style parameter declarations) | |
1141 | it is not. If NESTED is true, we are inside a function or parsing | |
1142 | old-style parameter declarations; any functions encountered are | |
1143 | nested functions and declaration specifiers are required; otherwise | |
1144 | we are at top level and functions are normal functions and | |
1145 | declaration specifiers may be optional. If EMPTY_OK is true, empty | |
1146 | declarations are OK (subject to all other constraints); otherwise | |
1147 | (old-style parameter declarations) they are diagnosed. If | |
1148 | START_ATTR_OK is true, the declaration specifiers may start with | |
1149 | attributes; otherwise they may not. | |
27bf414c JM |
1150 | |
1151 | declaration: | |
1152 | declaration-specifiers init-declarator-list[opt] ; | |
32912286 | 1153 | static_assert-declaration |
27bf414c JM |
1154 | |
1155 | function-definition: | |
1156 | declaration-specifiers[opt] declarator declaration-list[opt] | |
1157 | compound-statement | |
1158 | ||
1159 | declaration-list: | |
1160 | declaration | |
1161 | declaration-list declaration | |
1162 | ||
1163 | init-declarator-list: | |
1164 | init-declarator | |
1165 | init-declarator-list , init-declarator | |
1166 | ||
1167 | init-declarator: | |
1168 | declarator simple-asm-expr[opt] attributes[opt] | |
1169 | declarator simple-asm-expr[opt] attributes[opt] = initializer | |
1170 | ||
1171 | GNU extensions: | |
1172 | ||
1173 | nested-function-definition: | |
1174 | declaration-specifiers declarator declaration-list[opt] | |
1175 | compound-statement | |
1176 | ||
1177 | The simple-asm-expr and attributes are GNU extensions. | |
1178 | ||
1179 | This function does not handle __extension__; that is handled in its | |
1180 | callers. ??? Following the old parser, __extension__ may start | |
1181 | external declarations, declarations in functions and declarations | |
1182 | at the start of "for" loops, but not old-style parameter | |
1183 | declarations. | |
1184 | ||
1185 | C99 requires declaration specifiers in a function definition; the | |
1186 | absence is diagnosed through the diagnosis of implicit int. In GNU | |
1187 | C we also allow but diagnose declarations without declaration | |
1188 | specifiers, but only at top level (elsewhere they conflict with | |
953ff289 | 1189 | other syntax). |
b8698a0f | 1190 | |
953ff289 | 1191 | OpenMP: |
b8698a0f | 1192 | |
953ff289 DN |
1193 | declaration: |
1194 | threadprivate-directive */ | |
27bf414c JM |
1195 | |
1196 | static void | |
32912286 JM |
1197 | c_parser_declaration_or_fndef (c_parser *parser, bool fndef_ok, |
1198 | bool static_assert_ok, bool empty_ok, | |
27bf414c JM |
1199 | bool nested, bool start_attr_ok) |
1200 | { | |
1201 | struct c_declspecs *specs; | |
1202 | tree prefix_attrs; | |
1203 | tree all_prefix_attrs; | |
1204 | bool diagnosed_no_specs = false; | |
c7412148 | 1205 | location_t here = c_parser_peek_token (parser)->location; |
bc4071dd | 1206 | |
32912286 JM |
1207 | if (static_assert_ok |
1208 | && c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)) | |
1209 | { | |
1210 | c_parser_static_assert_declaration (parser); | |
1211 | return; | |
1212 | } | |
27bf414c JM |
1213 | specs = build_null_declspecs (); |
1214 | c_parser_declspecs (parser, specs, true, true, start_attr_ok); | |
1215 | if (parser->error) | |
1216 | { | |
1217 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1218 | return; | |
1219 | } | |
1220 | if (nested && !specs->declspecs_seen_p) | |
1221 | { | |
1222 | c_parser_error (parser, "expected declaration specifiers"); | |
1223 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1224 | return; | |
1225 | } | |
1226 | finish_declspecs (specs); | |
1227 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1228 | { | |
1229 | if (empty_ok) | |
1230 | shadow_tag (specs); | |
1231 | else | |
1232 | { | |
1233 | shadow_tag_warned (specs, 1); | |
509c9d60 | 1234 | pedwarn (here, 0, "empty declaration"); |
27bf414c JM |
1235 | } |
1236 | c_parser_consume_token (parser); | |
1237 | return; | |
1238 | } | |
1239 | pending_xref_error (); | |
1240 | prefix_attrs = specs->attrs; | |
1241 | all_prefix_attrs = prefix_attrs; | |
1242 | specs->attrs = NULL_TREE; | |
1243 | while (true) | |
1244 | { | |
1245 | struct c_declarator *declarator; | |
1246 | bool dummy = false; | |
1247 | tree fnbody; | |
1248 | /* Declaring either one or more declarators (in which case we | |
1249 | should diagnose if there were no declaration specifiers) or a | |
1250 | function definition (in which case the diagnostic for | |
1251 | implicit int suffices). */ | |
1252 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
1253 | C_DTR_NORMAL, &dummy); | |
1254 | if (declarator == NULL) | |
1255 | { | |
1256 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1257 | return; | |
1258 | } | |
1259 | if (c_parser_next_token_is (parser, CPP_EQ) | |
1260 | || c_parser_next_token_is (parser, CPP_COMMA) | |
1261 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
1262 | || c_parser_next_token_is_keyword (parser, RID_ASM) | |
1263 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1264 | { | |
1265 | tree asm_name = NULL_TREE; | |
1266 | tree postfix_attrs = NULL_TREE; | |
1267 | if (!diagnosed_no_specs && !specs->declspecs_seen_p) | |
1268 | { | |
1269 | diagnosed_no_specs = true; | |
509c9d60 | 1270 | pedwarn (here, 0, "data definition has no type or storage class"); |
27bf414c JM |
1271 | } |
1272 | /* Having seen a data definition, there cannot now be a | |
1273 | function definition. */ | |
1274 | fndef_ok = false; | |
1275 | if (c_parser_next_token_is_keyword (parser, RID_ASM)) | |
1276 | asm_name = c_parser_simple_asm_expr (parser); | |
1277 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1278 | postfix_attrs = c_parser_attributes (parser); | |
1279 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
1280 | { | |
1281 | tree d; | |
1282 | struct c_expr init; | |
c2255bc4 | 1283 | location_t init_loc; |
27bf414c JM |
1284 | c_parser_consume_token (parser); |
1285 | /* The declaration of the variable is in effect while | |
1286 | its initializer is parsed. */ | |
1287 | d = start_decl (declarator, specs, true, | |
1288 | chainon (postfix_attrs, all_prefix_attrs)); | |
1289 | if (!d) | |
1290 | d = error_mark_node; | |
1291 | start_init (d, asm_name, global_bindings_p ()); | |
c2255bc4 | 1292 | init_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1293 | init = c_parser_initializer (parser); |
1294 | finish_init (); | |
1295 | if (d != error_mark_node) | |
1296 | { | |
1297 | maybe_warn_string_init (TREE_TYPE (d), init); | |
c2255bc4 AH |
1298 | finish_decl (d, init_loc, init.value, |
1299 | init.original_type, asm_name); | |
27bf414c JM |
1300 | } |
1301 | } | |
1302 | else | |
1303 | { | |
1304 | tree d = start_decl (declarator, specs, false, | |
1305 | chainon (postfix_attrs, | |
1306 | all_prefix_attrs)); | |
1307 | if (d) | |
c2255bc4 AH |
1308 | finish_decl (d, UNKNOWN_LOCATION, NULL_TREE, |
1309 | NULL_TREE, asm_name); | |
27bf414c JM |
1310 | } |
1311 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
1312 | { | |
1313 | c_parser_consume_token (parser); | |
1314 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1315 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
1316 | prefix_attrs); | |
1317 | else | |
1318 | all_prefix_attrs = prefix_attrs; | |
1319 | continue; | |
1320 | } | |
1321 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1322 | { | |
1323 | c_parser_consume_token (parser); | |
1324 | return; | |
1325 | } | |
1326 | else | |
1327 | { | |
1328 | c_parser_error (parser, "expected %<,%> or %<;%>"); | |
1329 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1330 | return; | |
1331 | } | |
1332 | } | |
1333 | else if (!fndef_ok) | |
1334 | { | |
1335 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, " | |
1336 | "%<asm%> or %<__attribute__%>"); | |
1337 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1338 | return; | |
1339 | } | |
1340 | /* Function definition (nested or otherwise). */ | |
1341 | if (nested) | |
1342 | { | |
509c9d60 | 1343 | pedwarn (here, OPT_pedantic, "ISO C forbids nested functions"); |
d2784db4 | 1344 | c_push_function_context (); |
27bf414c JM |
1345 | } |
1346 | if (!start_function (specs, declarator, all_prefix_attrs)) | |
1347 | { | |
1348 | /* This can appear in many cases looking nothing like a | |
1349 | function definition, so we don't give a more specific | |
1350 | error suggesting there was one. */ | |
1351 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, %<asm%> " | |
1352 | "or %<__attribute__%>"); | |
1353 | if (nested) | |
d2784db4 | 1354 | c_pop_function_context (); |
27bf414c JM |
1355 | break; |
1356 | } | |
1357 | /* Parse old-style parameter declarations. ??? Attributes are | |
1358 | not allowed to start declaration specifiers here because of a | |
1359 | syntax conflict between a function declaration with attribute | |
1360 | suffix and a function definition with an attribute prefix on | |
1361 | first old-style parameter declaration. Following the old | |
1362 | parser, they are not accepted on subsequent old-style | |
1363 | parameter declarations either. However, there is no | |
1364 | ambiguity after the first declaration, nor indeed on the | |
1365 | first as long as we don't allow postfix attributes after a | |
1366 | declarator with a nonempty identifier list in a definition; | |
1367 | and postfix attributes have never been accepted here in | |
1368 | function definitions either. */ | |
1369 | while (c_parser_next_token_is_not (parser, CPP_EOF) | |
1370 | && c_parser_next_token_is_not (parser, CPP_OPEN_BRACE)) | |
32912286 JM |
1371 | c_parser_declaration_or_fndef (parser, false, false, false, |
1372 | true, false); | |
27bf414c | 1373 | store_parm_decls (); |
1751ecd6 AH |
1374 | DECL_STRUCT_FUNCTION (current_function_decl)->function_start_locus |
1375 | = c_parser_peek_token (parser)->location; | |
27bf414c JM |
1376 | fnbody = c_parser_compound_statement (parser); |
1377 | if (nested) | |
1378 | { | |
1379 | tree decl = current_function_decl; | |
9f62cb92 JJ |
1380 | /* Mark nested functions as needing static-chain initially. |
1381 | lower_nested_functions will recompute it but the | |
1382 | DECL_STATIC_CHAIN flag is also used before that happens, | |
1383 | by initializer_constant_valid_p. See gcc.dg/nested-fn-2.c. */ | |
1384 | DECL_STATIC_CHAIN (decl) = 1; | |
27bf414c JM |
1385 | add_stmt (fnbody); |
1386 | finish_function (); | |
d2784db4 | 1387 | c_pop_function_context (); |
c2255bc4 | 1388 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl)); |
27bf414c JM |
1389 | } |
1390 | else | |
1391 | { | |
1392 | add_stmt (fnbody); | |
1393 | finish_function (); | |
1394 | } | |
1395 | break; | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | /* Parse an asm-definition (asm() outside a function body). This is a | |
1400 | GNU extension. | |
1401 | ||
1402 | asm-definition: | |
1403 | simple-asm-expr ; | |
1404 | */ | |
1405 | ||
1406 | static void | |
1407 | c_parser_asm_definition (c_parser *parser) | |
1408 | { | |
1409 | tree asm_str = c_parser_simple_asm_expr (parser); | |
27bf414c | 1410 | if (asm_str) |
474eccc6 | 1411 | cgraph_add_asm_node (asm_str); |
27bf414c JM |
1412 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
1413 | } | |
1414 | ||
32912286 JM |
1415 | /* Parse a static assertion (C1X N1425 6.7.10). |
1416 | ||
1417 | static_assert-declaration: | |
1418 | static_assert-declaration-no-semi ; | |
1419 | */ | |
1420 | ||
1421 | static void | |
1422 | c_parser_static_assert_declaration (c_parser *parser) | |
1423 | { | |
1424 | c_parser_static_assert_declaration_no_semi (parser); | |
1425 | if (parser->error | |
1426 | || !c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
1427 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1428 | } | |
1429 | ||
1430 | /* Parse a static assertion (C1X N1425 6.7.10), without the trailing | |
1431 | semicolon. | |
1432 | ||
1433 | static_assert-declaration-no-semi: | |
1434 | _Static_assert ( constant-expression , string-literal ) | |
1435 | */ | |
1436 | ||
1437 | static void | |
1438 | c_parser_static_assert_declaration_no_semi (c_parser *parser) | |
1439 | { | |
1440 | location_t assert_loc, value_loc; | |
1441 | tree value; | |
1442 | tree string; | |
1443 | ||
1444 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)); | |
1445 | assert_loc = c_parser_peek_token (parser)->location; | |
1446 | if (!flag_isoc1x) | |
1447 | { | |
1448 | if (flag_isoc99) | |
1449 | pedwarn (assert_loc, OPT_pedantic, | |
1450 | "ISO C99 does not support %<_Static_assert%>"); | |
1451 | else | |
1452 | pedwarn (assert_loc, OPT_pedantic, | |
1453 | "ISO C90 does not support %<_Static_assert%>"); | |
1454 | } | |
1455 | c_parser_consume_token (parser); | |
1456 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
1457 | return; | |
1458 | value_loc = c_parser_peek_token (parser)->location; | |
1459 | value = c_parser_expr_no_commas (parser, NULL).value; | |
1460 | parser->lex_untranslated_string = true; | |
1461 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
1462 | { | |
1463 | parser->lex_untranslated_string = false; | |
1464 | return; | |
1465 | } | |
1466 | switch (c_parser_peek_token (parser)->type) | |
1467 | { | |
1468 | case CPP_STRING: | |
1469 | case CPP_STRING16: | |
1470 | case CPP_STRING32: | |
1471 | case CPP_WSTRING: | |
1472 | case CPP_UTF8STRING: | |
1473 | string = c_parser_peek_token (parser)->value; | |
1474 | c_parser_consume_token (parser); | |
1475 | parser->lex_untranslated_string = false; | |
1476 | break; | |
1477 | default: | |
1478 | c_parser_error (parser, "expected string literal"); | |
1479 | parser->lex_untranslated_string = false; | |
1480 | return; | |
1481 | } | |
1482 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
1483 | ||
1484 | if (!INTEGRAL_TYPE_P (TREE_TYPE (value))) | |
1485 | { | |
1486 | error_at (value_loc, "expression in static assertion is not an integer"); | |
1487 | return; | |
1488 | } | |
1489 | if (TREE_CODE (value) != INTEGER_CST) | |
1490 | { | |
1491 | value = c_fully_fold (value, false, NULL); | |
1492 | if (TREE_CODE (value) == INTEGER_CST) | |
1493 | pedwarn (value_loc, OPT_pedantic, "expression in static assertion " | |
1494 | "is not an integer constant expression"); | |
1495 | } | |
1496 | if (TREE_CODE (value) != INTEGER_CST) | |
1497 | { | |
1498 | error_at (value_loc, "expression in static assertion is not constant"); | |
1499 | return; | |
1500 | } | |
1501 | constant_expression_warning (value); | |
1502 | if (integer_zerop (value)) | |
1503 | error_at (assert_loc, "static assertion failed: %E", string); | |
1504 | } | |
1505 | ||
27bf414c JM |
1506 | /* Parse some declaration specifiers (possibly none) (C90 6.5, C99 |
1507 | 6.7), adding them to SPECS (which may already include some). | |
1508 | Storage class specifiers are accepted iff SCSPEC_OK; type | |
1509 | specifiers are accepted iff TYPESPEC_OK; attributes are accepted at | |
1510 | the start iff START_ATTR_OK. | |
1511 | ||
1512 | declaration-specifiers: | |
1513 | storage-class-specifier declaration-specifiers[opt] | |
1514 | type-specifier declaration-specifiers[opt] | |
1515 | type-qualifier declaration-specifiers[opt] | |
1516 | function-specifier declaration-specifiers[opt] | |
1517 | ||
1518 | Function specifiers (inline) are from C99, and are currently | |
1519 | handled as storage class specifiers, as is __thread. | |
1520 | ||
1521 | C90 6.5.1, C99 6.7.1: | |
1522 | storage-class-specifier: | |
1523 | typedef | |
1524 | extern | |
1525 | static | |
1526 | auto | |
1527 | register | |
1528 | ||
1529 | C99 6.7.4: | |
1530 | function-specifier: | |
1531 | inline | |
1532 | ||
1533 | C90 6.5.2, C99 6.7.2: | |
1534 | type-specifier: | |
1535 | void | |
1536 | char | |
1537 | short | |
1538 | int | |
1539 | long | |
1540 | float | |
1541 | double | |
1542 | signed | |
1543 | unsigned | |
1544 | _Bool | |
1545 | _Complex | |
1546 | [_Imaginary removed in C99 TC2] | |
1547 | struct-or-union-specifier | |
1548 | enum-specifier | |
1549 | typedef-name | |
1550 | ||
1551 | (_Bool and _Complex are new in C99.) | |
1552 | ||
1553 | C90 6.5.3, C99 6.7.3: | |
1554 | ||
1555 | type-qualifier: | |
1556 | const | |
1557 | restrict | |
1558 | volatile | |
36c5e70a | 1559 | address-space-qualifier |
27bf414c JM |
1560 | |
1561 | (restrict is new in C99.) | |
1562 | ||
1563 | GNU extensions: | |
1564 | ||
1565 | declaration-specifiers: | |
1566 | attributes declaration-specifiers[opt] | |
1567 | ||
36c5e70a BE |
1568 | type-qualifier: |
1569 | address-space | |
1570 | ||
1571 | address-space: | |
1572 | identifier recognized by the target | |
1573 | ||
27bf414c JM |
1574 | storage-class-specifier: |
1575 | __thread | |
1576 | ||
1577 | type-specifier: | |
1578 | typeof-specifier | |
a6766312 | 1579 | __int128 |
9a8ce21f JG |
1580 | _Decimal32 |
1581 | _Decimal64 | |
1582 | _Decimal128 | |
ab22c1fa CF |
1583 | _Fract |
1584 | _Accum | |
1585 | _Sat | |
1586 | ||
1587 | (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037: | |
1588 | http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf) | |
27bf414c JM |
1589 | |
1590 | Objective-C: | |
1591 | ||
1592 | type-specifier: | |
1593 | class-name objc-protocol-refs[opt] | |
1594 | typedef-name objc-protocol-refs | |
1595 | objc-protocol-refs | |
1596 | */ | |
1597 | ||
1598 | static void | |
1599 | c_parser_declspecs (c_parser *parser, struct c_declspecs *specs, | |
1600 | bool scspec_ok, bool typespec_ok, bool start_attr_ok) | |
1601 | { | |
1602 | bool attrs_ok = start_attr_ok; | |
1603 | bool seen_type = specs->type_seen_p; | |
1604 | while (c_parser_next_token_is (parser, CPP_NAME) | |
1605 | || c_parser_next_token_is (parser, CPP_KEYWORD) | |
1606 | || (c_dialect_objc () && c_parser_next_token_is (parser, CPP_LESS))) | |
1607 | { | |
1608 | struct c_typespec t; | |
1609 | tree attrs; | |
dc491a25 | 1610 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1611 | if (c_parser_next_token_is (parser, CPP_NAME)) |
1612 | { | |
1613 | tree value = c_parser_peek_token (parser)->value; | |
1614 | c_id_kind kind = c_parser_peek_token (parser)->id_kind; | |
36c5e70a BE |
1615 | |
1616 | if (kind == C_ID_ADDRSPACE) | |
1617 | { | |
1618 | addr_space_t as | |
1619 | = c_parser_peek_token (parser)->keyword - RID_FIRST_ADDR_SPACE; | |
1620 | declspecs_add_addrspace (specs, as); | |
1621 | c_parser_consume_token (parser); | |
1622 | attrs_ok = true; | |
1623 | continue; | |
1624 | } | |
1625 | ||
27bf414c JM |
1626 | /* This finishes the specifiers unless a type name is OK, it |
1627 | is declared as a type name and a type name hasn't yet | |
1628 | been seen. */ | |
1629 | if (!typespec_ok || seen_type | |
1630 | || (kind != C_ID_TYPENAME && kind != C_ID_CLASSNAME)) | |
1631 | break; | |
1632 | c_parser_consume_token (parser); | |
1633 | seen_type = true; | |
1634 | attrs_ok = true; | |
1635 | if (kind == C_ID_TYPENAME | |
1636 | && (!c_dialect_objc () | |
1637 | || c_parser_next_token_is_not (parser, CPP_LESS))) | |
1638 | { | |
1639 | t.kind = ctsk_typedef; | |
1640 | /* For a typedef name, record the meaning, not the name. | |
1641 | In case of 'foo foo, bar;'. */ | |
1642 | t.spec = lookup_name (value); | |
928c19bb JM |
1643 | t.expr = NULL_TREE; |
1644 | t.expr_const_operands = true; | |
27bf414c JM |
1645 | } |
1646 | else | |
1647 | { | |
1648 | tree proto = NULL_TREE; | |
1649 | gcc_assert (c_dialect_objc ()); | |
1650 | t.kind = ctsk_objc; | |
1651 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
1652 | proto = c_parser_objc_protocol_refs (parser); | |
1653 | t.spec = objc_get_protocol_qualified_type (value, proto); | |
928c19bb JM |
1654 | t.expr = NULL_TREE; |
1655 | t.expr_const_operands = true; | |
27bf414c | 1656 | } |
dc491a25 | 1657 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1658 | continue; |
1659 | } | |
1660 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
1661 | { | |
1662 | /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" - | |
1663 | nisse@lysator.liu.se. */ | |
1664 | tree proto; | |
1665 | gcc_assert (c_dialect_objc ()); | |
1666 | if (!typespec_ok || seen_type) | |
1667 | break; | |
1668 | proto = c_parser_objc_protocol_refs (parser); | |
1669 | t.kind = ctsk_objc; | |
1670 | t.spec = objc_get_protocol_qualified_type (NULL_TREE, proto); | |
928c19bb JM |
1671 | t.expr = NULL_TREE; |
1672 | t.expr_const_operands = true; | |
dc491a25 | 1673 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1674 | continue; |
1675 | } | |
1676 | gcc_assert (c_parser_next_token_is (parser, CPP_KEYWORD)); | |
1677 | switch (c_parser_peek_token (parser)->keyword) | |
1678 | { | |
1679 | case RID_STATIC: | |
1680 | case RID_EXTERN: | |
1681 | case RID_REGISTER: | |
1682 | case RID_TYPEDEF: | |
1683 | case RID_INLINE: | |
1684 | case RID_AUTO: | |
1685 | case RID_THREAD: | |
1686 | if (!scspec_ok) | |
1687 | goto out; | |
1688 | attrs_ok = true; | |
1689 | /* TODO: Distinguish between function specifiers (inline) | |
1690 | and storage class specifiers, either here or in | |
1691 | declspecs_add_scspec. */ | |
1692 | declspecs_add_scspec (specs, c_parser_peek_token (parser)->value); | |
1693 | c_parser_consume_token (parser); | |
1694 | break; | |
1695 | case RID_UNSIGNED: | |
1696 | case RID_LONG: | |
a6766312 | 1697 | case RID_INT128: |
27bf414c JM |
1698 | case RID_SHORT: |
1699 | case RID_SIGNED: | |
1700 | case RID_COMPLEX: | |
1701 | case RID_INT: | |
1702 | case RID_CHAR: | |
1703 | case RID_FLOAT: | |
1704 | case RID_DOUBLE: | |
1705 | case RID_VOID: | |
9a8ce21f JG |
1706 | case RID_DFLOAT32: |
1707 | case RID_DFLOAT64: | |
1708 | case RID_DFLOAT128: | |
27bf414c | 1709 | case RID_BOOL: |
ab22c1fa CF |
1710 | case RID_FRACT: |
1711 | case RID_ACCUM: | |
1712 | case RID_SAT: | |
27bf414c JM |
1713 | if (!typespec_ok) |
1714 | goto out; | |
1715 | attrs_ok = true; | |
1716 | seen_type = true; | |
0bacb8c7 TT |
1717 | if (c_dialect_objc ()) |
1718 | parser->objc_need_raw_identifier = true; | |
27bf414c JM |
1719 | t.kind = ctsk_resword; |
1720 | t.spec = c_parser_peek_token (parser)->value; | |
928c19bb JM |
1721 | t.expr = NULL_TREE; |
1722 | t.expr_const_operands = true; | |
dc491a25 | 1723 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1724 | c_parser_consume_token (parser); |
1725 | break; | |
1726 | case RID_ENUM: | |
1727 | if (!typespec_ok) | |
1728 | goto out; | |
1729 | attrs_ok = true; | |
1730 | seen_type = true; | |
1731 | t = c_parser_enum_specifier (parser); | |
dc491a25 | 1732 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1733 | break; |
1734 | case RID_STRUCT: | |
1735 | case RID_UNION: | |
1736 | if (!typespec_ok) | |
1737 | goto out; | |
1738 | attrs_ok = true; | |
1739 | seen_type = true; | |
1740 | t = c_parser_struct_or_union_specifier (parser); | |
dab71827 | 1741 | invoke_plugin_callbacks (PLUGIN_FINISH_TYPE, t.spec); |
dc491a25 | 1742 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1743 | break; |
1744 | case RID_TYPEOF: | |
1745 | /* ??? The old parser rejected typeof after other type | |
1746 | specifiers, but is a syntax error the best way of | |
1747 | handling this? */ | |
1748 | if (!typespec_ok || seen_type) | |
1749 | goto out; | |
1750 | attrs_ok = true; | |
1751 | seen_type = true; | |
1752 | t = c_parser_typeof_specifier (parser); | |
dc491a25 | 1753 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1754 | break; |
1755 | case RID_CONST: | |
1756 | case RID_VOLATILE: | |
1757 | case RID_RESTRICT: | |
1758 | attrs_ok = true; | |
1759 | declspecs_add_qual (specs, c_parser_peek_token (parser)->value); | |
1760 | c_parser_consume_token (parser); | |
1761 | break; | |
1762 | case RID_ATTRIBUTE: | |
1763 | if (!attrs_ok) | |
1764 | goto out; | |
1765 | attrs = c_parser_attributes (parser); | |
1766 | declspecs_add_attrs (specs, attrs); | |
1767 | break; | |
1768 | default: | |
1769 | goto out; | |
1770 | } | |
1771 | } | |
1772 | out: ; | |
1773 | } | |
1774 | ||
1775 | /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2). | |
1776 | ||
1777 | enum-specifier: | |
1778 | enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt] | |
1779 | enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt] | |
1780 | enum attributes[opt] identifier | |
1781 | ||
1782 | The form with trailing comma is new in C99. The forms with | |
1783 | attributes are GNU extensions. In GNU C, we accept any expression | |
1784 | without commas in the syntax (assignment expressions, not just | |
1785 | conditional expressions); assignment expressions will be diagnosed | |
1786 | as non-constant. | |
1787 | ||
1788 | enumerator-list: | |
1789 | enumerator | |
1790 | enumerator-list , enumerator | |
1791 | ||
1792 | enumerator: | |
1793 | enumeration-constant | |
1794 | enumeration-constant = constant-expression | |
1795 | */ | |
1796 | ||
1797 | static struct c_typespec | |
1798 | c_parser_enum_specifier (c_parser *parser) | |
1799 | { | |
1800 | struct c_typespec ret; | |
1801 | tree attrs; | |
1802 | tree ident = NULL_TREE; | |
24b97832 | 1803 | location_t enum_loc; |
922f2908 | 1804 | location_t ident_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c | 1805 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ENUM)); |
24b97832 | 1806 | enum_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1807 | c_parser_consume_token (parser); |
1808 | attrs = c_parser_attributes (parser); | |
c2255bc4 | 1809 | enum_loc = c_parser_peek_token (parser)->location; |
5af28c74 TT |
1810 | /* Set the location in case we create a decl now. */ |
1811 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
27bf414c JM |
1812 | if (c_parser_next_token_is (parser, CPP_NAME)) |
1813 | { | |
1814 | ident = c_parser_peek_token (parser)->value; | |
c7412148 | 1815 | ident_loc = c_parser_peek_token (parser)->location; |
24b97832 | 1816 | enum_loc = ident_loc; |
27bf414c JM |
1817 | c_parser_consume_token (parser); |
1818 | } | |
1819 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
1820 | { | |
1821 | /* Parse an enum definition. */ | |
7114359f | 1822 | struct c_enum_contents the_enum; |
c2255bc4 | 1823 | tree type = start_enum (enum_loc, &the_enum, ident); |
27bf414c JM |
1824 | tree postfix_attrs; |
1825 | /* We chain the enumerators in reverse order, then put them in | |
1826 | forward order at the end. */ | |
1827 | tree values = NULL_TREE; | |
1828 | c_parser_consume_token (parser); | |
1829 | while (true) | |
1830 | { | |
1831 | tree enum_id; | |
1832 | tree enum_value; | |
1833 | tree enum_decl; | |
1834 | bool seen_comma; | |
5af28c74 | 1835 | c_token *token; |
922f2908 | 1836 | location_t comma_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
85790e66 | 1837 | location_t value_loc; |
27bf414c JM |
1838 | if (c_parser_next_token_is_not (parser, CPP_NAME)) |
1839 | { | |
1840 | c_parser_error (parser, "expected identifier"); | |
1841 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
1842 | values = error_mark_node; | |
1843 | break; | |
1844 | } | |
5af28c74 TT |
1845 | token = c_parser_peek_token (parser); |
1846 | enum_id = token->value; | |
1847 | /* Set the location in case we create a decl now. */ | |
1848 | c_parser_set_source_position_from_token (token); | |
85790e66 | 1849 | value_loc = token->location; |
27bf414c JM |
1850 | c_parser_consume_token (parser); |
1851 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
1852 | { | |
1853 | c_parser_consume_token (parser); | |
85790e66 | 1854 | value_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1855 | enum_value = c_parser_expr_no_commas (parser, NULL).value; |
1856 | } | |
1857 | else | |
1858 | enum_value = NULL_TREE; | |
c2255bc4 AH |
1859 | enum_decl = build_enumerator (value_loc, |
1860 | &the_enum, enum_id, enum_value); | |
27bf414c JM |
1861 | TREE_CHAIN (enum_decl) = values; |
1862 | values = enum_decl; | |
1863 | seen_comma = false; | |
1864 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
1865 | { | |
c7412148 | 1866 | comma_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1867 | seen_comma = true; |
1868 | c_parser_consume_token (parser); | |
1869 | } | |
1870 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
1871 | { | |
fcf73884 | 1872 | if (seen_comma && !flag_isoc99) |
509c9d60 | 1873 | pedwarn (comma_loc, OPT_pedantic, "comma at end of enumerator list"); |
27bf414c JM |
1874 | c_parser_consume_token (parser); |
1875 | break; | |
1876 | } | |
1877 | if (!seen_comma) | |
1878 | { | |
1879 | c_parser_error (parser, "expected %<,%> or %<}%>"); | |
1880 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
1881 | values = error_mark_node; | |
1882 | break; | |
1883 | } | |
1884 | } | |
1885 | postfix_attrs = c_parser_attributes (parser); | |
1886 | ret.spec = finish_enum (type, nreverse (values), | |
1887 | chainon (attrs, postfix_attrs)); | |
1888 | ret.kind = ctsk_tagdef; | |
928c19bb JM |
1889 | ret.expr = NULL_TREE; |
1890 | ret.expr_const_operands = true; | |
27bf414c JM |
1891 | return ret; |
1892 | } | |
1893 | else if (!ident) | |
1894 | { | |
1895 | c_parser_error (parser, "expected %<{%>"); | |
1896 | ret.spec = error_mark_node; | |
1897 | ret.kind = ctsk_tagref; | |
928c19bb JM |
1898 | ret.expr = NULL_TREE; |
1899 | ret.expr_const_operands = true; | |
27bf414c JM |
1900 | return ret; |
1901 | } | |
c2255bc4 | 1902 | ret = parser_xref_tag (ident_loc, ENUMERAL_TYPE, ident); |
27bf414c JM |
1903 | /* In ISO C, enumerated types can be referred to only if already |
1904 | defined. */ | |
1905 | if (pedantic && !COMPLETE_TYPE_P (ret.spec)) | |
c7412148 TT |
1906 | { |
1907 | gcc_assert (ident); | |
c2255bc4 | 1908 | pedwarn (enum_loc, OPT_pedantic, |
509c9d60 | 1909 | "ISO C forbids forward references to %<enum%> types"); |
c7412148 | 1910 | } |
27bf414c JM |
1911 | return ret; |
1912 | } | |
1913 | ||
1914 | /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1). | |
1915 | ||
1916 | struct-or-union-specifier: | |
1917 | struct-or-union attributes[opt] identifier[opt] | |
1918 | { struct-contents } attributes[opt] | |
1919 | struct-or-union attributes[opt] identifier | |
1920 | ||
1921 | struct-contents: | |
1922 | struct-declaration-list | |
1923 | ||
1924 | struct-declaration-list: | |
1925 | struct-declaration ; | |
1926 | struct-declaration-list struct-declaration ; | |
1927 | ||
1928 | GNU extensions: | |
1929 | ||
1930 | struct-contents: | |
1931 | empty | |
1932 | struct-declaration | |
1933 | struct-declaration-list struct-declaration | |
1934 | ||
1935 | struct-declaration-list: | |
1936 | struct-declaration-list ; | |
1937 | ; | |
1938 | ||
1939 | (Note that in the syntax here, unlike that in ISO C, the semicolons | |
1940 | are included here rather than in struct-declaration, in order to | |
1941 | describe the syntax with extra semicolons and missing semicolon at | |
1942 | end.) | |
1943 | ||
1944 | Objective-C: | |
1945 | ||
1946 | struct-declaration-list: | |
1947 | @defs ( class-name ) | |
1948 | ||
1949 | (Note this does not include a trailing semicolon, but can be | |
1950 | followed by further declarations, and gets a pedwarn-if-pedantic | |
1951 | when followed by a semicolon.) */ | |
1952 | ||
1953 | static struct c_typespec | |
1954 | c_parser_struct_or_union_specifier (c_parser *parser) | |
1955 | { | |
1956 | struct c_typespec ret; | |
1957 | tree attrs; | |
1958 | tree ident = NULL_TREE; | |
24b97832 ILT |
1959 | location_t struct_loc; |
1960 | location_t ident_loc = UNKNOWN_LOCATION; | |
27bf414c JM |
1961 | enum tree_code code; |
1962 | switch (c_parser_peek_token (parser)->keyword) | |
1963 | { | |
1964 | case RID_STRUCT: | |
1965 | code = RECORD_TYPE; | |
1966 | break; | |
1967 | case RID_UNION: | |
1968 | code = UNION_TYPE; | |
1969 | break; | |
1970 | default: | |
1971 | gcc_unreachable (); | |
1972 | } | |
24b97832 | 1973 | struct_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1974 | c_parser_consume_token (parser); |
1975 | attrs = c_parser_attributes (parser); | |
c2255bc4 | 1976 | |
5af28c74 TT |
1977 | /* Set the location in case we create a decl now. */ |
1978 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
c2255bc4 | 1979 | |
27bf414c JM |
1980 | if (c_parser_next_token_is (parser, CPP_NAME)) |
1981 | { | |
1982 | ident = c_parser_peek_token (parser)->value; | |
24b97832 ILT |
1983 | ident_loc = c_parser_peek_token (parser)->location; |
1984 | struct_loc = ident_loc; | |
27bf414c JM |
1985 | c_parser_consume_token (parser); |
1986 | } | |
1987 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
1988 | { | |
1989 | /* Parse a struct or union definition. Start the scope of the | |
1990 | tag before parsing components. */ | |
dc491a25 ILT |
1991 | struct c_struct_parse_info *struct_info; |
1992 | tree type = start_struct (struct_loc, code, ident, &struct_info); | |
27bf414c JM |
1993 | tree postfix_attrs; |
1994 | /* We chain the components in reverse order, then put them in | |
1995 | forward order at the end. Each struct-declaration may | |
1996 | declare multiple components (comma-separated), so we must use | |
1997 | chainon to join them, although when parsing each | |
1998 | struct-declaration we can use TREE_CHAIN directly. | |
1999 | ||
2000 | The theory behind all this is that there will be more | |
2001 | semicolon separated fields than comma separated fields, and | |
2002 | so we'll be minimizing the number of node traversals required | |
2003 | by chainon. */ | |
2004 | tree contents = NULL_TREE; | |
2005 | c_parser_consume_token (parser); | |
2006 | /* Handle the Objective-C @defs construct, | |
2007 | e.g. foo(sizeof(struct{ @defs(ClassName) }));. */ | |
2008 | if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS)) | |
2009 | { | |
2010 | tree name; | |
2011 | gcc_assert (c_dialect_objc ()); | |
2012 | c_parser_consume_token (parser); | |
2013 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2014 | goto end_at_defs; | |
2015 | if (c_parser_next_token_is (parser, CPP_NAME) | |
2016 | && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME) | |
2017 | { | |
2018 | name = c_parser_peek_token (parser)->value; | |
2019 | c_parser_consume_token (parser); | |
2020 | } | |
2021 | else | |
2022 | { | |
2023 | c_parser_error (parser, "expected class name"); | |
2024 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
2025 | goto end_at_defs; | |
2026 | } | |
2027 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2028 | "expected %<)%>"); | |
2029 | contents = nreverse (objc_get_class_ivars (name)); | |
2030 | } | |
2031 | end_at_defs: | |
2032 | /* Parse the struct-declarations and semicolons. Problems with | |
2033 | semicolons are diagnosed here; empty structures are diagnosed | |
2034 | elsewhere. */ | |
2035 | while (true) | |
2036 | { | |
2037 | tree decls; | |
2038 | /* Parse any stray semicolon. */ | |
2039 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2040 | { | |
b8698a0f | 2041 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
509c9d60 | 2042 | "extra semicolon in struct or union specified"); |
27bf414c JM |
2043 | c_parser_consume_token (parser); |
2044 | continue; | |
2045 | } | |
2046 | /* Stop if at the end of the struct or union contents. */ | |
2047 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2048 | { | |
2049 | c_parser_consume_token (parser); | |
2050 | break; | |
2051 | } | |
bc4071dd RH |
2052 | /* Accept #pragmas at struct scope. */ |
2053 | if (c_parser_next_token_is (parser, CPP_PRAGMA)) | |
2054 | { | |
2055 | c_parser_pragma (parser, pragma_external); | |
2056 | continue; | |
2057 | } | |
27bf414c JM |
2058 | /* Parse some comma-separated declarations, but not the |
2059 | trailing semicolon if any. */ | |
2060 | decls = c_parser_struct_declaration (parser); | |
2061 | contents = chainon (decls, contents); | |
2062 | /* If no semicolon follows, either we have a parse error or | |
2063 | are at the end of the struct or union and should | |
2064 | pedwarn. */ | |
2065 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2066 | c_parser_consume_token (parser); | |
2067 | else | |
2068 | { | |
2069 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
b8698a0f | 2070 | pedwarn (c_parser_peek_token (parser)->location, 0, |
509c9d60 | 2071 | "no semicolon at end of struct or union"); |
27bf414c JM |
2072 | else |
2073 | { | |
2074 | c_parser_error (parser, "expected %<;%>"); | |
2075 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
2076 | break; | |
2077 | } | |
2078 | } | |
2079 | } | |
2080 | postfix_attrs = c_parser_attributes (parser); | |
c2255bc4 | 2081 | ret.spec = finish_struct (struct_loc, type, nreverse (contents), |
dc491a25 | 2082 | chainon (attrs, postfix_attrs), struct_info); |
27bf414c | 2083 | ret.kind = ctsk_tagdef; |
928c19bb JM |
2084 | ret.expr = NULL_TREE; |
2085 | ret.expr_const_operands = true; | |
27bf414c JM |
2086 | return ret; |
2087 | } | |
2088 | else if (!ident) | |
2089 | { | |
2090 | c_parser_error (parser, "expected %<{%>"); | |
2091 | ret.spec = error_mark_node; | |
2092 | ret.kind = ctsk_tagref; | |
928c19bb JM |
2093 | ret.expr = NULL_TREE; |
2094 | ret.expr_const_operands = true; | |
67c2939d | 2095 | return ret; |
27bf414c | 2096 | } |
c2255bc4 | 2097 | ret = parser_xref_tag (ident_loc, code, ident); |
27bf414c JM |
2098 | return ret; |
2099 | } | |
2100 | ||
2101 | /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without* | |
2102 | the trailing semicolon. | |
2103 | ||
2104 | struct-declaration: | |
2105 | specifier-qualifier-list struct-declarator-list | |
32912286 | 2106 | static_assert-declaration-no-semi |
27bf414c JM |
2107 | |
2108 | specifier-qualifier-list: | |
2109 | type-specifier specifier-qualifier-list[opt] | |
2110 | type-qualifier specifier-qualifier-list[opt] | |
2111 | attributes specifier-qualifier-list[opt] | |
2112 | ||
2113 | struct-declarator-list: | |
2114 | struct-declarator | |
2115 | struct-declarator-list , attributes[opt] struct-declarator | |
2116 | ||
2117 | struct-declarator: | |
2118 | declarator attributes[opt] | |
2119 | declarator[opt] : constant-expression attributes[opt] | |
2120 | ||
2121 | GNU extensions: | |
2122 | ||
2123 | struct-declaration: | |
2124 | __extension__ struct-declaration | |
2125 | specifier-qualifier-list | |
2126 | ||
2127 | Unlike the ISO C syntax, semicolons are handled elsewhere. The use | |
2128 | of attributes where shown is a GNU extension. In GNU C, we accept | |
2129 | any expression without commas in the syntax (assignment | |
2130 | expressions, not just conditional expressions); assignment | |
2131 | expressions will be diagnosed as non-constant. */ | |
2132 | ||
2133 | static tree | |
2134 | c_parser_struct_declaration (c_parser *parser) | |
2135 | { | |
2136 | struct c_declspecs *specs; | |
2137 | tree prefix_attrs; | |
2138 | tree all_prefix_attrs; | |
2139 | tree decls; | |
c7412148 | 2140 | location_t decl_loc; |
27bf414c JM |
2141 | if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) |
2142 | { | |
2143 | int ext; | |
2144 | tree decl; | |
2145 | ext = disable_extension_diagnostics (); | |
2146 | c_parser_consume_token (parser); | |
2147 | decl = c_parser_struct_declaration (parser); | |
2148 | restore_extension_diagnostics (ext); | |
2149 | return decl; | |
2150 | } | |
32912286 JM |
2151 | if (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)) |
2152 | { | |
2153 | c_parser_static_assert_declaration_no_semi (parser); | |
2154 | return NULL_TREE; | |
2155 | } | |
27bf414c | 2156 | specs = build_null_declspecs (); |
c7412148 | 2157 | decl_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2158 | c_parser_declspecs (parser, specs, false, true, true); |
2159 | if (parser->error) | |
67c2939d | 2160 | return NULL_TREE; |
27bf414c JM |
2161 | if (!specs->declspecs_seen_p) |
2162 | { | |
2163 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
2164 | return NULL_TREE; | |
2165 | } | |
2166 | finish_declspecs (specs); | |
2167 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2168 | { | |
2169 | tree ret; | |
2170 | if (!specs->type_seen_p) | |
2171 | { | |
b8698a0f | 2172 | pedwarn (decl_loc, OPT_pedantic, |
509c9d60 | 2173 | "ISO C forbids member declarations with no members"); |
27bf414c JM |
2174 | shadow_tag_warned (specs, pedantic); |
2175 | ret = NULL_TREE; | |
2176 | } | |
2177 | else | |
2178 | { | |
2179 | /* Support for unnamed structs or unions as members of | |
2180 | structs or unions (which is [a] useful and [b] supports | |
2181 | MS P-SDK). */ | |
b9baeecd | 2182 | tree attrs = NULL; |
3d10ed6c AH |
2183 | |
2184 | ret = grokfield (c_parser_peek_token (parser)->location, | |
2185 | build_id_declarator (NULL_TREE), specs, | |
b9baeecd | 2186 | NULL_TREE, &attrs); |
0ad7e054 RS |
2187 | if (ret) |
2188 | decl_attributes (&ret, attrs, 0); | |
27bf414c JM |
2189 | } |
2190 | return ret; | |
2191 | } | |
2192 | pending_xref_error (); | |
2193 | prefix_attrs = specs->attrs; | |
2194 | all_prefix_attrs = prefix_attrs; | |
2195 | specs->attrs = NULL_TREE; | |
2196 | decls = NULL_TREE; | |
2197 | while (true) | |
2198 | { | |
2199 | /* Declaring one or more declarators or un-named bit-fields. */ | |
2200 | struct c_declarator *declarator; | |
2201 | bool dummy = false; | |
2202 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2203 | declarator = build_id_declarator (NULL_TREE); | |
2204 | else | |
2205 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
2206 | C_DTR_NORMAL, &dummy); | |
2207 | if (declarator == NULL) | |
2208 | { | |
2209 | c_parser_skip_to_end_of_block_or_statement (parser); | |
2210 | break; | |
2211 | } | |
2212 | if (c_parser_next_token_is (parser, CPP_COLON) | |
2213 | || c_parser_next_token_is (parser, CPP_COMMA) | |
2214 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2215 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE) | |
2216 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2217 | { | |
2218 | tree postfix_attrs = NULL_TREE; | |
2219 | tree width = NULL_TREE; | |
2220 | tree d; | |
2221 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2222 | { | |
2223 | c_parser_consume_token (parser); | |
2224 | width = c_parser_expr_no_commas (parser, NULL).value; | |
2225 | } | |
2226 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2227 | postfix_attrs = c_parser_attributes (parser); | |
3d10ed6c AH |
2228 | d = grokfield (c_parser_peek_token (parser)->location, |
2229 | declarator, specs, width, &all_prefix_attrs); | |
27bf414c JM |
2230 | decl_attributes (&d, chainon (postfix_attrs, |
2231 | all_prefix_attrs), 0); | |
2232 | TREE_CHAIN (d) = decls; | |
2233 | decls = d; | |
2234 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2235 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
2236 | prefix_attrs); | |
2237 | else | |
2238 | all_prefix_attrs = prefix_attrs; | |
2239 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
2240 | c_parser_consume_token (parser); | |
2241 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2242 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2243 | { | |
2244 | /* Semicolon consumed in caller. */ | |
2245 | break; | |
2246 | } | |
2247 | else | |
2248 | { | |
2249 | c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>"); | |
2250 | break; | |
2251 | } | |
2252 | } | |
2253 | else | |
2254 | { | |
2255 | c_parser_error (parser, | |
2256 | "expected %<:%>, %<,%>, %<;%>, %<}%> or " | |
2257 | "%<__attribute__%>"); | |
2258 | break; | |
2259 | } | |
2260 | } | |
2261 | return decls; | |
2262 | } | |
2263 | ||
2264 | /* Parse a typeof specifier (a GNU extension). | |
2265 | ||
2266 | typeof-specifier: | |
2267 | typeof ( expression ) | |
2268 | typeof ( type-name ) | |
2269 | */ | |
2270 | ||
2271 | static struct c_typespec | |
2272 | c_parser_typeof_specifier (c_parser *parser) | |
2273 | { | |
2274 | struct c_typespec ret; | |
2275 | ret.kind = ctsk_typeof; | |
2276 | ret.spec = error_mark_node; | |
928c19bb JM |
2277 | ret.expr = NULL_TREE; |
2278 | ret.expr_const_operands = true; | |
27bf414c JM |
2279 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF)); |
2280 | c_parser_consume_token (parser); | |
7d882b83 | 2281 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
2282 | in_typeof++; |
2283 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2284 | { | |
7d882b83 | 2285 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2286 | in_typeof--; |
2287 | return ret; | |
2288 | } | |
2289 | if (c_parser_next_token_starts_typename (parser)) | |
2290 | { | |
2291 | struct c_type_name *type = c_parser_type_name (parser); | |
7d882b83 | 2292 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2293 | in_typeof--; |
2294 | if (type != NULL) | |
2295 | { | |
928c19bb | 2296 | ret.spec = groktypename (type, &ret.expr, &ret.expr_const_operands); |
27bf414c JM |
2297 | pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE)); |
2298 | } | |
2299 | } | |
2300 | else | |
2301 | { | |
52ffd86e | 2302 | bool was_vm; |
c7412148 | 2303 | location_t here = c_parser_peek_token (parser)->location; |
27bf414c | 2304 | struct c_expr expr = c_parser_expression (parser); |
7d882b83 | 2305 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2306 | in_typeof--; |
2307 | if (TREE_CODE (expr.value) == COMPONENT_REF | |
2308 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
3ba09659 | 2309 | error_at (here, "%<typeof%> applied to a bit-field"); |
ebfbbdc5 | 2310 | mark_exp_read (expr.value); |
27bf414c | 2311 | ret.spec = TREE_TYPE (expr.value); |
52ffd86e | 2312 | was_vm = variably_modified_type_p (ret.spec, NULL_TREE); |
928c19bb JM |
2313 | /* This is returned with the type so that when the type is |
2314 | evaluated, this can be evaluated. */ | |
2315 | if (was_vm) | |
2316 | ret.expr = c_fully_fold (expr.value, false, &ret.expr_const_operands); | |
52ffd86e | 2317 | pop_maybe_used (was_vm); |
27bf414c JM |
2318 | } |
2319 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
2320 | return ret; | |
2321 | } | |
2322 | ||
2323 | /* Parse a declarator, possibly an abstract declarator (C90 6.5.4, | |
2324 | 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may | |
2325 | be redeclared; otherwise it may not. KIND indicates which kind of | |
2326 | declarator is wanted. Returns a valid declarator except in the | |
2327 | case of a syntax error in which case NULL is returned. *SEEN_ID is | |
2328 | set to true if an identifier being declared is seen; this is used | |
2329 | to diagnose bad forms of abstract array declarators and to | |
2330 | determine whether an identifier list is syntactically permitted. | |
2331 | ||
2332 | declarator: | |
2333 | pointer[opt] direct-declarator | |
2334 | ||
2335 | direct-declarator: | |
2336 | identifier | |
2337 | ( attributes[opt] declarator ) | |
2338 | direct-declarator array-declarator | |
2339 | direct-declarator ( parameter-type-list ) | |
2340 | direct-declarator ( identifier-list[opt] ) | |
2341 | ||
2342 | pointer: | |
2343 | * type-qualifier-list[opt] | |
2344 | * type-qualifier-list[opt] pointer | |
2345 | ||
2346 | type-qualifier-list: | |
2347 | type-qualifier | |
2348 | attributes | |
2349 | type-qualifier-list type-qualifier | |
2350 | type-qualifier-list attributes | |
2351 | ||
2352 | parameter-type-list: | |
2353 | parameter-list | |
2354 | parameter-list , ... | |
2355 | ||
2356 | parameter-list: | |
2357 | parameter-declaration | |
2358 | parameter-list , parameter-declaration | |
2359 | ||
2360 | parameter-declaration: | |
2361 | declaration-specifiers declarator attributes[opt] | |
2362 | declaration-specifiers abstract-declarator[opt] attributes[opt] | |
2363 | ||
2364 | identifier-list: | |
2365 | identifier | |
2366 | identifier-list , identifier | |
2367 | ||
2368 | abstract-declarator: | |
2369 | pointer | |
2370 | pointer[opt] direct-abstract-declarator | |
2371 | ||
2372 | direct-abstract-declarator: | |
2373 | ( attributes[opt] abstract-declarator ) | |
2374 | direct-abstract-declarator[opt] array-declarator | |
2375 | direct-abstract-declarator[opt] ( parameter-type-list[opt] ) | |
2376 | ||
2377 | GNU extensions: | |
2378 | ||
2379 | direct-declarator: | |
2380 | direct-declarator ( parameter-forward-declarations | |
2381 | parameter-type-list[opt] ) | |
2382 | ||
2383 | direct-abstract-declarator: | |
c22cacf3 | 2384 | direct-abstract-declarator[opt] ( parameter-forward-declarations |
27bf414c JM |
2385 | parameter-type-list[opt] ) |
2386 | ||
2387 | parameter-forward-declarations: | |
2388 | parameter-list ; | |
2389 | parameter-forward-declarations parameter-list ; | |
2390 | ||
2391 | The uses of attributes shown above are GNU extensions. | |
2392 | ||
2393 | Some forms of array declarator are not included in C99 in the | |
2394 | syntax for abstract declarators; these are disallowed elsewhere. | |
2395 | This may be a defect (DR#289). | |
2396 | ||
2397 | This function also accepts an omitted abstract declarator as being | |
2398 | an abstract declarator, although not part of the formal syntax. */ | |
2399 | ||
2400 | static struct c_declarator * | |
2401 | c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2402 | bool *seen_id) | |
2403 | { | |
2404 | /* Parse any initial pointer part. */ | |
2405 | if (c_parser_next_token_is (parser, CPP_MULT)) | |
2406 | { | |
2407 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
2408 | struct c_declarator *inner; | |
2409 | c_parser_consume_token (parser); | |
2410 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2411 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); | |
2412 | if (inner == NULL) | |
2413 | return NULL; | |
2414 | else | |
2415 | return make_pointer_declarator (quals_attrs, inner); | |
2416 | } | |
2417 | /* Now we have a direct declarator, direct abstract declarator or | |
2418 | nothing (which counts as a direct abstract declarator here). */ | |
2419 | return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id); | |
2420 | } | |
2421 | ||
2422 | /* Parse a direct declarator or direct abstract declarator; arguments | |
2423 | as c_parser_declarator. */ | |
2424 | ||
2425 | static struct c_declarator * | |
2426 | c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2427 | bool *seen_id) | |
2428 | { | |
2429 | /* The direct declarator must start with an identifier (possibly | |
2430 | omitted) or a parenthesized declarator (possibly abstract). In | |
2431 | an ordinary declarator, initial parentheses must start a | |
2432 | parenthesized declarator. In an abstract declarator or parameter | |
2433 | declarator, they could start a parenthesized declarator or a | |
2434 | parameter list. To tell which, the open parenthesis and any | |
2435 | following attributes must be read. If a declaration specifier | |
2436 | follows, then it is a parameter list; if the specifier is a | |
2437 | typedef name, there might be an ambiguity about redeclaring it, | |
2438 | which is resolved in the direction of treating it as a typedef | |
2439 | name. If a close parenthesis follows, it is also an empty | |
2440 | parameter list, as the syntax does not permit empty abstract | |
0fa2e4df | 2441 | declarators. Otherwise, it is a parenthesized declarator (in |
27bf414c JM |
2442 | which case the analysis may be repeated inside it, recursively). |
2443 | ||
2444 | ??? There is an ambiguity in a parameter declaration "int | |
2445 | (__attribute__((foo)) x)", where x is not a typedef name: it | |
2446 | could be an abstract declarator for a function, or declare x with | |
2447 | parentheses. The proper resolution of this ambiguity needs | |
2448 | documenting. At present we follow an accident of the old | |
2449 | parser's implementation, whereby the first parameter must have | |
2450 | some declaration specifiers other than just attributes. Thus as | |
0fa2e4df | 2451 | a parameter declaration it is treated as a parenthesized |
27bf414c JM |
2452 | parameter named x, and as an abstract declarator it is |
2453 | rejected. | |
2454 | ||
2455 | ??? Also following the old parser, attributes inside an empty | |
2456 | parameter list are ignored, making it a list not yielding a | |
2457 | prototype, rather than giving an error or making it have one | |
2458 | parameter with implicit type int. | |
2459 | ||
2460 | ??? Also following the old parser, typedef names may be | |
2461 | redeclared in declarators, but not Objective-C class names. */ | |
2462 | ||
2463 | if (kind != C_DTR_ABSTRACT | |
2464 | && c_parser_next_token_is (parser, CPP_NAME) | |
2465 | && ((type_seen_p | |
2466 | && c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME) | |
2467 | || c_parser_peek_token (parser)->id_kind == C_ID_ID)) | |
2468 | { | |
2469 | struct c_declarator *inner | |
2470 | = build_id_declarator (c_parser_peek_token (parser)->value); | |
2471 | *seen_id = true; | |
6037d88d | 2472 | inner->id_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2473 | c_parser_consume_token (parser); |
2474 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2475 | } | |
2476 | ||
2477 | if (kind != C_DTR_NORMAL | |
2478 | && c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
2479 | { | |
2480 | struct c_declarator *inner = build_id_declarator (NULL_TREE); | |
2481 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2482 | } | |
2483 | ||
2484 | /* Either we are at the end of an abstract declarator, or we have | |
2485 | parentheses. */ | |
2486 | ||
2487 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
2488 | { | |
2489 | tree attrs; | |
2490 | struct c_declarator *inner; | |
2491 | c_parser_consume_token (parser); | |
2492 | attrs = c_parser_attributes (parser); | |
2493 | if (kind != C_DTR_NORMAL | |
2494 | && (c_parser_next_token_starts_declspecs (parser) | |
2495 | || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))) | |
2496 | { | |
2497 | struct c_arg_info *args | |
2498 | = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL, | |
2499 | attrs); | |
2500 | if (args == NULL) | |
2501 | return NULL; | |
2502 | else | |
2503 | { | |
2504 | inner | |
2505 | = build_function_declarator (args, | |
2506 | build_id_declarator (NULL_TREE)); | |
2507 | return c_parser_direct_declarator_inner (parser, *seen_id, | |
2508 | inner); | |
2509 | } | |
2510 | } | |
2511 | /* A parenthesized declarator. */ | |
2512 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); | |
2513 | if (inner != NULL && attrs != NULL) | |
2514 | inner = build_attrs_declarator (attrs, inner); | |
2515 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2516 | { | |
2517 | c_parser_consume_token (parser); | |
2518 | if (inner == NULL) | |
2519 | return NULL; | |
2520 | else | |
2521 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2522 | } | |
2523 | else | |
2524 | { | |
2525 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2526 | "expected %<)%>"); | |
2527 | return NULL; | |
2528 | } | |
2529 | } | |
2530 | else | |
2531 | { | |
2532 | if (kind == C_DTR_NORMAL) | |
2533 | { | |
2534 | c_parser_error (parser, "expected identifier or %<(%>"); | |
2535 | return NULL; | |
2536 | } | |
2537 | else | |
2538 | return build_id_declarator (NULL_TREE); | |
2539 | } | |
2540 | } | |
2541 | ||
2542 | /* Parse part of a direct declarator or direct abstract declarator, | |
2543 | given that some (in INNER) has already been parsed; ID_PRESENT is | |
2544 | true if an identifier is present, false for an abstract | |
2545 | declarator. */ | |
2546 | ||
2547 | static struct c_declarator * | |
2548 | c_parser_direct_declarator_inner (c_parser *parser, bool id_present, | |
2549 | struct c_declarator *inner) | |
2550 | { | |
2551 | /* Parse a sequence of array declarators and parameter lists. */ | |
2552 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
2553 | { | |
b8698a0f | 2554 | location_t brace_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2555 | struct c_declarator *declarator; |
2556 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
2557 | bool static_seen; | |
2558 | bool star_seen; | |
2559 | tree dimen; | |
2560 | c_parser_consume_token (parser); | |
2561 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2562 | static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC); | |
2563 | if (static_seen) | |
2564 | c_parser_consume_token (parser); | |
2565 | if (static_seen && !quals_attrs->declspecs_seen_p) | |
2566 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2567 | if (!quals_attrs->declspecs_seen_p) | |
2568 | quals_attrs = NULL; | |
2569 | /* If "static" is present, there must be an array dimension. | |
2570 | Otherwise, there may be a dimension, "*", or no | |
2571 | dimension. */ | |
2572 | if (static_seen) | |
2573 | { | |
2574 | star_seen = false; | |
2575 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2576 | } | |
2577 | else | |
2578 | { | |
2579 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
2580 | { | |
2581 | dimen = NULL_TREE; | |
2582 | star_seen = false; | |
2583 | } | |
2584 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
2585 | { | |
2586 | if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE) | |
2587 | { | |
2588 | dimen = NULL_TREE; | |
2589 | star_seen = true; | |
2590 | c_parser_consume_token (parser); | |
2591 | } | |
2592 | else | |
2593 | { | |
2594 | star_seen = false; | |
2595 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2596 | } | |
2597 | } | |
2598 | else | |
2599 | { | |
2600 | star_seen = false; | |
2601 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2602 | } | |
2603 | } | |
2604 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
2605 | c_parser_consume_token (parser); | |
2606 | else | |
2607 | { | |
2608 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
2609 | "expected %<]%>"); | |
2610 | return NULL; | |
2611 | } | |
97e3c923 JJ |
2612 | if (dimen) |
2613 | mark_exp_read (dimen); | |
c2255bc4 AH |
2614 | declarator = build_array_declarator (brace_loc, dimen, quals_attrs, |
2615 | static_seen, star_seen); | |
52ffd86e MS |
2616 | if (declarator == NULL) |
2617 | return NULL; | |
6ac0194d | 2618 | inner = set_array_declarator_inner (declarator, inner); |
27bf414c JM |
2619 | return c_parser_direct_declarator_inner (parser, id_present, inner); |
2620 | } | |
2621 | else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
2622 | { | |
2623 | tree attrs; | |
2624 | struct c_arg_info *args; | |
2625 | c_parser_consume_token (parser); | |
2626 | attrs = c_parser_attributes (parser); | |
2627 | args = c_parser_parms_declarator (parser, id_present, attrs); | |
2628 | if (args == NULL) | |
2629 | return NULL; | |
2630 | else | |
2631 | { | |
2632 | inner = build_function_declarator (args, inner); | |
2633 | return c_parser_direct_declarator_inner (parser, id_present, inner); | |
2634 | } | |
2635 | } | |
2636 | return inner; | |
2637 | } | |
2638 | ||
2639 | /* Parse a parameter list or identifier list, including the closing | |
2640 | parenthesis but not the opening one. ATTRS are the attributes at | |
2641 | the start of the list. ID_LIST_OK is true if an identifier list is | |
2642 | acceptable; such a list must not have attributes at the start. */ | |
2643 | ||
2644 | static struct c_arg_info * | |
2645 | c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs) | |
2646 | { | |
2647 | push_scope (); | |
2648 | declare_parm_level (); | |
2649 | /* If the list starts with an identifier, it is an identifier list. | |
2650 | Otherwise, it is either a prototype list or an empty list. */ | |
2651 | if (id_list_ok | |
2652 | && !attrs | |
2653 | && c_parser_next_token_is (parser, CPP_NAME) | |
2654 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
2655 | { | |
7fa3585c | 2656 | tree list = NULL_TREE, *nextp = &list; |
27bf414c JM |
2657 | while (c_parser_next_token_is (parser, CPP_NAME) |
2658 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
2659 | { | |
7fa3585c GK |
2660 | *nextp = build_tree_list (NULL_TREE, |
2661 | c_parser_peek_token (parser)->value); | |
2662 | nextp = & TREE_CHAIN (*nextp); | |
27bf414c JM |
2663 | c_parser_consume_token (parser); |
2664 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
2665 | break; | |
2666 | c_parser_consume_token (parser); | |
2667 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2668 | { | |
2669 | c_parser_error (parser, "expected identifier"); | |
2670 | break; | |
2671 | } | |
2672 | } | |
2673 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2674 | { | |
2675 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2676 | ret->parms = 0; | |
2677 | ret->tags = 0; | |
2678 | ret->types = list; | |
2679 | ret->others = 0; | |
3542a5c0 | 2680 | ret->pending_sizes = 0; |
6a1f8611 | 2681 | ret->had_vla_unspec = 0; |
27bf414c JM |
2682 | c_parser_consume_token (parser); |
2683 | pop_scope (); | |
2684 | return ret; | |
2685 | } | |
2686 | else | |
2687 | { | |
2688 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2689 | "expected %<)%>"); | |
2690 | pop_scope (); | |
2691 | return NULL; | |
2692 | } | |
2693 | } | |
2694 | else | |
2695 | { | |
2696 | struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs); | |
2697 | pop_scope (); | |
2698 | return ret; | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | /* Parse a parameter list (possibly empty), including the closing | |
2703 | parenthesis but not the opening one. ATTRS are the attributes at | |
2704 | the start of the list. */ | |
2705 | ||
2706 | static struct c_arg_info * | |
2707 | c_parser_parms_list_declarator (c_parser *parser, tree attrs) | |
2708 | { | |
2709 | bool good_parm = false; | |
2710 | /* ??? Following the old parser, forward parameter declarations may | |
2711 | use abstract declarators, and if no real parameter declarations | |
2712 | follow the forward declarations then this is not diagnosed. Also | |
2713 | note as above that attributes are ignored as the only contents of | |
2714 | the parentheses, or as the only contents after forward | |
2715 | declarations. */ | |
2716 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2717 | { | |
2718 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2719 | ret->parms = 0; | |
2720 | ret->tags = 0; | |
2721 | ret->types = 0; | |
2722 | ret->others = 0; | |
3542a5c0 | 2723 | ret->pending_sizes = 0; |
6a1f8611 | 2724 | ret->had_vla_unspec = 0; |
27bf414c JM |
2725 | c_parser_consume_token (parser); |
2726 | return ret; | |
2727 | } | |
2728 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
2729 | { | |
2730 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2731 | ret->parms = 0; | |
2732 | ret->tags = 0; | |
2733 | ret->others = 0; | |
3542a5c0 | 2734 | ret->pending_sizes = 0; |
6a1f8611 | 2735 | ret->had_vla_unspec = 0; |
27bf414c JM |
2736 | /* Suppress -Wold-style-definition for this case. */ |
2737 | ret->types = error_mark_node; | |
3ba09659 AH |
2738 | error_at (c_parser_peek_token (parser)->location, |
2739 | "ISO C requires a named argument before %<...%>"); | |
27bf414c JM |
2740 | c_parser_consume_token (parser); |
2741 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2742 | { | |
2743 | c_parser_consume_token (parser); | |
2744 | return ret; | |
2745 | } | |
2746 | else | |
2747 | { | |
2748 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2749 | "expected %<)%>"); | |
2750 | return NULL; | |
2751 | } | |
2752 | } | |
2753 | /* Nonempty list of parameters, either terminated with semicolon | |
2754 | (forward declarations; recurse) or with close parenthesis (normal | |
2755 | function) or with ", ... )" (variadic function). */ | |
2756 | while (true) | |
2757 | { | |
2758 | /* Parse a parameter. */ | |
2759 | struct c_parm *parm = c_parser_parameter_declaration (parser, attrs); | |
2760 | attrs = NULL_TREE; | |
2761 | if (parm != NULL) | |
2762 | { | |
2763 | good_parm = true; | |
2764 | push_parm_decl (parm); | |
2765 | } | |
2766 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2767 | { | |
2768 | tree new_attrs; | |
2769 | c_parser_consume_token (parser); | |
91d975b8 | 2770 | mark_forward_parm_decls (); |
27bf414c JM |
2771 | new_attrs = c_parser_attributes (parser); |
2772 | return c_parser_parms_list_declarator (parser, new_attrs); | |
2773 | } | |
2774 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2775 | { | |
2776 | c_parser_consume_token (parser); | |
2777 | if (good_parm) | |
2778 | return get_parm_info (false); | |
2779 | else | |
2780 | { | |
2781 | struct c_arg_info *ret | |
2782 | = XOBNEW (&parser_obstack, struct c_arg_info); | |
2783 | ret->parms = 0; | |
2784 | ret->tags = 0; | |
2785 | ret->types = 0; | |
2786 | ret->others = 0; | |
3542a5c0 | 2787 | ret->pending_sizes = 0; |
6a1f8611 | 2788 | ret->had_vla_unspec = 0; |
27bf414c JM |
2789 | return ret; |
2790 | } | |
2791 | } | |
2792 | if (!c_parser_require (parser, CPP_COMMA, | |
2793 | "expected %<;%>, %<,%> or %<)%>")) | |
2794 | { | |
2795 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
f007042e | 2796 | get_pending_sizes (); |
27bf414c JM |
2797 | return NULL; |
2798 | } | |
2799 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
2800 | { | |
2801 | c_parser_consume_token (parser); | |
2802 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2803 | { | |
2804 | c_parser_consume_token (parser); | |
2805 | if (good_parm) | |
2806 | return get_parm_info (true); | |
2807 | else | |
2808 | { | |
2809 | struct c_arg_info *ret | |
2810 | = XOBNEW (&parser_obstack, struct c_arg_info); | |
2811 | ret->parms = 0; | |
2812 | ret->tags = 0; | |
2813 | ret->types = 0; | |
2814 | ret->others = 0; | |
3542a5c0 | 2815 | ret->pending_sizes = 0; |
6a1f8611 | 2816 | ret->had_vla_unspec = 0; |
27bf414c JM |
2817 | return ret; |
2818 | } | |
2819 | } | |
2820 | else | |
2821 | { | |
2822 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2823 | "expected %<)%>"); | |
f007042e | 2824 | get_pending_sizes (); |
27bf414c JM |
2825 | return NULL; |
2826 | } | |
2827 | } | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | /* Parse a parameter declaration. ATTRS are the attributes at the | |
2832 | start of the declaration if it is the first parameter. */ | |
2833 | ||
2834 | static struct c_parm * | |
2835 | c_parser_parameter_declaration (c_parser *parser, tree attrs) | |
2836 | { | |
2837 | struct c_declspecs *specs; | |
2838 | struct c_declarator *declarator; | |
2839 | tree prefix_attrs; | |
2840 | tree postfix_attrs = NULL_TREE; | |
2841 | bool dummy = false; | |
2842 | if (!c_parser_next_token_starts_declspecs (parser)) | |
2843 | { | |
2844 | /* ??? In some Objective-C cases '...' isn't applicable so there | |
2845 | should be a different message. */ | |
2846 | c_parser_error (parser, | |
2847 | "expected declaration specifiers or %<...%>"); | |
2848 | c_parser_skip_to_end_of_parameter (parser); | |
2849 | return NULL; | |
2850 | } | |
2851 | specs = build_null_declspecs (); | |
2852 | if (attrs) | |
2853 | { | |
2854 | declspecs_add_attrs (specs, attrs); | |
2855 | attrs = NULL_TREE; | |
2856 | } | |
2857 | c_parser_declspecs (parser, specs, true, true, true); | |
2858 | finish_declspecs (specs); | |
2859 | pending_xref_error (); | |
2860 | prefix_attrs = specs->attrs; | |
2861 | specs->attrs = NULL_TREE; | |
2862 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
2863 | C_DTR_PARM, &dummy); | |
2864 | if (declarator == NULL) | |
2865 | { | |
2866 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
2867 | return NULL; | |
2868 | } | |
2869 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2870 | postfix_attrs = c_parser_attributes (parser); | |
2871 | return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs), | |
2872 | declarator); | |
2873 | } | |
2874 | ||
2875 | /* Parse a string literal in an asm expression. It should not be | |
2876 | translated, and wide string literals are an error although | |
2877 | permitted by the syntax. This is a GNU extension. | |
2878 | ||
2879 | asm-string-literal: | |
2880 | string-literal | |
2881 | ||
2882 | ??? At present, following the old parser, the caller needs to have | |
46c2514e TT |
2883 | set lex_untranslated_string to 1. It would be better to follow the |
2884 | C++ parser rather than using this kludge. */ | |
27bf414c JM |
2885 | |
2886 | static tree | |
2887 | c_parser_asm_string_literal (c_parser *parser) | |
2888 | { | |
2889 | tree str; | |
2890 | if (c_parser_next_token_is (parser, CPP_STRING)) | |
2891 | { | |
2892 | str = c_parser_peek_token (parser)->value; | |
2893 | c_parser_consume_token (parser); | |
2894 | } | |
2895 | else if (c_parser_next_token_is (parser, CPP_WSTRING)) | |
2896 | { | |
3ba09659 AH |
2897 | error_at (c_parser_peek_token (parser)->location, |
2898 | "wide string literal in %<asm%>"); | |
27bf414c JM |
2899 | str = build_string (1, ""); |
2900 | c_parser_consume_token (parser); | |
2901 | } | |
2902 | else | |
2903 | { | |
2904 | c_parser_error (parser, "expected string literal"); | |
2905 | str = NULL_TREE; | |
2906 | } | |
2907 | return str; | |
2908 | } | |
2909 | ||
2910 | /* Parse a simple asm expression. This is used in restricted | |
2911 | contexts, where a full expression with inputs and outputs does not | |
2912 | make sense. This is a GNU extension. | |
2913 | ||
2914 | simple-asm-expr: | |
2915 | asm ( asm-string-literal ) | |
2916 | */ | |
2917 | ||
2918 | static tree | |
2919 | c_parser_simple_asm_expr (c_parser *parser) | |
2920 | { | |
2921 | tree str; | |
2922 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); | |
2923 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
2924 | lex_untranslated_string kludge. */ |
2925 | parser->lex_untranslated_string = true; | |
27bf414c JM |
2926 | c_parser_consume_token (parser); |
2927 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2928 | { | |
46c2514e | 2929 | parser->lex_untranslated_string = false; |
27bf414c JM |
2930 | return NULL_TREE; |
2931 | } | |
2932 | str = c_parser_asm_string_literal (parser); | |
46c2514e | 2933 | parser->lex_untranslated_string = false; |
27bf414c JM |
2934 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
2935 | { | |
2936 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
2937 | return NULL_TREE; | |
2938 | } | |
2939 | return str; | |
2940 | } | |
2941 | ||
2942 | /* Parse (possibly empty) attributes. This is a GNU extension. | |
2943 | ||
2944 | attributes: | |
2945 | empty | |
2946 | attributes attribute | |
2947 | ||
2948 | attribute: | |
2949 | __attribute__ ( ( attribute-list ) ) | |
2950 | ||
2951 | attribute-list: | |
2952 | attrib | |
2953 | attribute_list , attrib | |
2954 | ||
2955 | attrib: | |
2956 | empty | |
2957 | any-word | |
2958 | any-word ( identifier ) | |
2959 | any-word ( identifier , nonempty-expr-list ) | |
2960 | any-word ( expr-list ) | |
2961 | ||
2962 | where the "identifier" must not be declared as a type, and | |
2963 | "any-word" may be any identifier (including one declared as a | |
2964 | type), a reserved word storage class specifier, type specifier or | |
2965 | type qualifier. ??? This still leaves out most reserved keywords | |
2966 | (following the old parser), shouldn't we include them, and why not | |
2967 | allow identifiers declared as types to start the arguments? */ | |
2968 | ||
2969 | static tree | |
2970 | c_parser_attributes (c_parser *parser) | |
2971 | { | |
2972 | tree attrs = NULL_TREE; | |
2973 | while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2974 | { | |
2975 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
2976 | lex_untranslated_string kludge. */ |
2977 | parser->lex_untranslated_string = true; | |
27bf414c JM |
2978 | c_parser_consume_token (parser); |
2979 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2980 | { | |
46c2514e | 2981 | parser->lex_untranslated_string = false; |
27bf414c JM |
2982 | return attrs; |
2983 | } | |
2984 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2985 | { | |
46c2514e | 2986 | parser->lex_untranslated_string = false; |
27bf414c JM |
2987 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
2988 | return attrs; | |
2989 | } | |
2990 | /* Parse the attribute list. */ | |
2991 | while (c_parser_next_token_is (parser, CPP_COMMA) | |
2992 | || c_parser_next_token_is (parser, CPP_NAME) | |
2993 | || c_parser_next_token_is (parser, CPP_KEYWORD)) | |
2994 | { | |
2995 | tree attr, attr_name, attr_args; | |
bbbbb16a | 2996 | VEC(tree,gc) *expr_list; |
27bf414c JM |
2997 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
2998 | { | |
2999 | c_parser_consume_token (parser); | |
3000 | continue; | |
3001 | } | |
3002 | if (c_parser_next_token_is (parser, CPP_KEYWORD)) | |
3003 | { | |
3004 | /* ??? See comment above about what keywords are | |
3005 | accepted here. */ | |
3006 | bool ok; | |
3007 | switch (c_parser_peek_token (parser)->keyword) | |
3008 | { | |
3009 | case RID_STATIC: | |
3010 | case RID_UNSIGNED: | |
3011 | case RID_LONG: | |
a6766312 | 3012 | case RID_INT128: |
27bf414c JM |
3013 | case RID_CONST: |
3014 | case RID_EXTERN: | |
3015 | case RID_REGISTER: | |
3016 | case RID_TYPEDEF: | |
3017 | case RID_SHORT: | |
3018 | case RID_INLINE: | |
3019 | case RID_VOLATILE: | |
3020 | case RID_SIGNED: | |
3021 | case RID_AUTO: | |
3022 | case RID_RESTRICT: | |
3023 | case RID_COMPLEX: | |
3024 | case RID_THREAD: | |
3025 | case RID_INT: | |
3026 | case RID_CHAR: | |
3027 | case RID_FLOAT: | |
3028 | case RID_DOUBLE: | |
3029 | case RID_VOID: | |
9a8ce21f JG |
3030 | case RID_DFLOAT32: |
3031 | case RID_DFLOAT64: | |
3032 | case RID_DFLOAT128: | |
27bf414c | 3033 | case RID_BOOL: |
ab22c1fa CF |
3034 | case RID_FRACT: |
3035 | case RID_ACCUM: | |
3036 | case RID_SAT: | |
27bf414c JM |
3037 | ok = true; |
3038 | break; | |
3039 | default: | |
3040 | ok = false; | |
3041 | break; | |
3042 | } | |
3043 | if (!ok) | |
3044 | break; | |
5dc4a7f4 JJ |
3045 | /* Accept __attribute__((__const)) as __attribute__((const)) |
3046 | etc. */ | |
3047 | attr_name | |
3048 | = ridpointers[(int) c_parser_peek_token (parser)->keyword]; | |
27bf414c | 3049 | } |
5dc4a7f4 JJ |
3050 | else |
3051 | attr_name = c_parser_peek_token (parser)->value; | |
27bf414c JM |
3052 | c_parser_consume_token (parser); |
3053 | if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN)) | |
3054 | { | |
3055 | attr = build_tree_list (attr_name, NULL_TREE); | |
3056 | attrs = chainon (attrs, attr); | |
3057 | continue; | |
3058 | } | |
3059 | c_parser_consume_token (parser); | |
3060 | /* Parse the attribute contents. If they start with an | |
3061 | identifier which is followed by a comma or close | |
3062 | parenthesis, then the arguments start with that | |
3063 | identifier; otherwise they are an expression list. */ | |
3064 | if (c_parser_next_token_is (parser, CPP_NAME) | |
3065 | && c_parser_peek_token (parser)->id_kind == C_ID_ID | |
3066 | && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA) | |
3067 | || (c_parser_peek_2nd_token (parser)->type | |
3068 | == CPP_CLOSE_PAREN))) | |
3069 | { | |
3070 | tree arg1 = c_parser_peek_token (parser)->value; | |
3071 | c_parser_consume_token (parser); | |
3072 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3073 | attr_args = build_tree_list (NULL_TREE, arg1); | |
3074 | else | |
3075 | { | |
bbbbb16a | 3076 | tree tree_list; |
27bf414c | 3077 | c_parser_consume_token (parser); |
bbbbb16a | 3078 | expr_list = c_parser_expr_list (parser, false, true, NULL); |
c166b898 | 3079 | tree_list = build_tree_list_vec (expr_list); |
bbbbb16a | 3080 | attr_args = tree_cons (NULL_TREE, arg1, tree_list); |
c166b898 | 3081 | release_tree_vector (expr_list); |
27bf414c JM |
3082 | } |
3083 | } | |
3084 | else | |
3085 | { | |
3086 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3087 | attr_args = NULL_TREE; | |
3088 | else | |
bbbbb16a ILT |
3089 | { |
3090 | expr_list = c_parser_expr_list (parser, false, true, NULL); | |
c166b898 ILT |
3091 | attr_args = build_tree_list_vec (expr_list); |
3092 | release_tree_vector (expr_list); | |
bbbbb16a | 3093 | } |
27bf414c JM |
3094 | } |
3095 | attr = build_tree_list (attr_name, attr_args); | |
3096 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3097 | c_parser_consume_token (parser); | |
3098 | else | |
3099 | { | |
46c2514e | 3100 | parser->lex_untranslated_string = false; |
27bf414c JM |
3101 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3102 | "expected %<)%>"); | |
3103 | return attrs; | |
3104 | } | |
3105 | attrs = chainon (attrs, attr); | |
3106 | } | |
3107 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3108 | c_parser_consume_token (parser); | |
3109 | else | |
3110 | { | |
46c2514e | 3111 | parser->lex_untranslated_string = false; |
27bf414c JM |
3112 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3113 | "expected %<)%>"); | |
3114 | return attrs; | |
3115 | } | |
3116 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3117 | c_parser_consume_token (parser); | |
3118 | else | |
3119 | { | |
46c2514e | 3120 | parser->lex_untranslated_string = false; |
27bf414c JM |
3121 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3122 | "expected %<)%>"); | |
3123 | return attrs; | |
3124 | } | |
46c2514e | 3125 | parser->lex_untranslated_string = false; |
27bf414c JM |
3126 | } |
3127 | return attrs; | |
3128 | } | |
3129 | ||
3130 | /* Parse a type name (C90 6.5.5, C99 6.7.6). | |
3131 | ||
3132 | type-name: | |
3133 | specifier-qualifier-list abstract-declarator[opt] | |
3134 | */ | |
3135 | ||
3136 | static struct c_type_name * | |
3137 | c_parser_type_name (c_parser *parser) | |
3138 | { | |
3139 | struct c_declspecs *specs = build_null_declspecs (); | |
3140 | struct c_declarator *declarator; | |
3141 | struct c_type_name *ret; | |
3142 | bool dummy = false; | |
3143 | c_parser_declspecs (parser, specs, false, true, true); | |
3144 | if (!specs->declspecs_seen_p) | |
3145 | { | |
3146 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
3147 | return NULL; | |
3148 | } | |
3149 | pending_xref_error (); | |
3150 | finish_declspecs (specs); | |
3151 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
3152 | C_DTR_ABSTRACT, &dummy); | |
3153 | if (declarator == NULL) | |
3154 | return NULL; | |
3155 | ret = XOBNEW (&parser_obstack, struct c_type_name); | |
3156 | ret->specs = specs; | |
3157 | ret->declarator = declarator; | |
3158 | return ret; | |
3159 | } | |
3160 | ||
3161 | /* Parse an initializer (C90 6.5.7, C99 6.7.8). | |
3162 | ||
3163 | initializer: | |
3164 | assignment-expression | |
3165 | { initializer-list } | |
3166 | { initializer-list , } | |
3167 | ||
3168 | initializer-list: | |
3169 | designation[opt] initializer | |
3170 | initializer-list , designation[opt] initializer | |
3171 | ||
3172 | designation: | |
3173 | designator-list = | |
3174 | ||
3175 | designator-list: | |
3176 | designator | |
3177 | designator-list designator | |
3178 | ||
3179 | designator: | |
3180 | array-designator | |
3181 | . identifier | |
3182 | ||
3183 | array-designator: | |
3184 | [ constant-expression ] | |
3185 | ||
3186 | GNU extensions: | |
3187 | ||
3188 | initializer: | |
3189 | { } | |
3190 | ||
3191 | designation: | |
3192 | array-designator | |
3193 | identifier : | |
3194 | ||
3195 | array-designator: | |
3196 | [ constant-expression ... constant-expression ] | |
3197 | ||
3198 | Any expression without commas is accepted in the syntax for the | |
3199 | constant-expressions, with non-constant expressions rejected later. | |
3200 | ||
3201 | This function is only used for top-level initializers; for nested | |
3202 | ones, see c_parser_initval. */ | |
3203 | ||
3204 | static struct c_expr | |
3205 | c_parser_initializer (c_parser *parser) | |
3206 | { | |
3207 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
3208 | return c_parser_braced_init (parser, NULL_TREE, false); | |
3209 | else | |
46bdb9cf JM |
3210 | { |
3211 | struct c_expr ret; | |
c2255bc4 | 3212 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf JM |
3213 | ret = c_parser_expr_no_commas (parser, NULL); |
3214 | if (TREE_CODE (ret.value) != STRING_CST | |
3215 | && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR) | |
ebfbbdc5 | 3216 | ret = default_function_array_read_conversion (loc, ret); |
46bdb9cf JM |
3217 | return ret; |
3218 | } | |
27bf414c JM |
3219 | } |
3220 | ||
3221 | /* Parse a braced initializer list. TYPE is the type specified for a | |
3222 | compound literal, and NULL_TREE for other initializers and for | |
3223 | nested braced lists. NESTED_P is true for nested braced lists, | |
3224 | false for the list of a compound literal or the list that is the | |
3225 | top-level initializer in a declaration. */ | |
3226 | ||
3227 | static struct c_expr | |
3228 | c_parser_braced_init (c_parser *parser, tree type, bool nested_p) | |
3229 | { | |
a1e3b3d9 LB |
3230 | struct c_expr ret; |
3231 | struct obstack braced_init_obstack; | |
c7412148 | 3232 | location_t brace_loc = c_parser_peek_token (parser)->location; |
a1e3b3d9 | 3233 | gcc_obstack_init (&braced_init_obstack); |
27bf414c JM |
3234 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); |
3235 | c_parser_consume_token (parser); | |
3236 | if (nested_p) | |
a1e3b3d9 | 3237 | push_init_level (0, &braced_init_obstack); |
27bf414c JM |
3238 | else |
3239 | really_start_incremental_init (type); | |
3240 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3241 | { | |
509c9d60 | 3242 | pedwarn (brace_loc, OPT_pedantic, "ISO C forbids empty initializer braces"); |
27bf414c JM |
3243 | } |
3244 | else | |
3245 | { | |
3246 | /* Parse a non-empty initializer list, possibly with a trailing | |
3247 | comma. */ | |
3248 | while (true) | |
3249 | { | |
a1e3b3d9 | 3250 | c_parser_initelt (parser, &braced_init_obstack); |
27bf414c JM |
3251 | if (parser->error) |
3252 | break; | |
3253 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
3254 | c_parser_consume_token (parser); | |
3255 | else | |
3256 | break; | |
3257 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3258 | break; | |
3259 | } | |
3260 | } | |
3261 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
3262 | { | |
27bf414c JM |
3263 | ret.value = error_mark_node; |
3264 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 3265 | ret.original_type = NULL; |
27bf414c | 3266 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>"); |
a1e3b3d9 LB |
3267 | pop_init_level (0, &braced_init_obstack); |
3268 | obstack_free (&braced_init_obstack, NULL); | |
27bf414c JM |
3269 | return ret; |
3270 | } | |
3271 | c_parser_consume_token (parser); | |
a1e3b3d9 LB |
3272 | ret = pop_init_level (0, &braced_init_obstack); |
3273 | obstack_free (&braced_init_obstack, NULL); | |
3274 | return ret; | |
27bf414c JM |
3275 | } |
3276 | ||
3277 | /* Parse a nested initializer, including designators. */ | |
3278 | ||
3279 | static void | |
a1e3b3d9 | 3280 | c_parser_initelt (c_parser *parser, struct obstack * braced_init_obstack) |
27bf414c JM |
3281 | { |
3282 | /* Parse any designator or designator list. A single array | |
3283 | designator may have the subsequent "=" omitted in GNU C, but a | |
3284 | longer list or a structure member designator may not. */ | |
3285 | if (c_parser_next_token_is (parser, CPP_NAME) | |
3286 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON) | |
3287 | { | |
3288 | /* Old-style structure member designator. */ | |
a1e3b3d9 LB |
3289 | set_init_label (c_parser_peek_token (parser)->value, |
3290 | braced_init_obstack); | |
fcf73884 | 3291 | /* Use the colon as the error location. */ |
b8698a0f | 3292 | pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_pedantic, |
509c9d60 | 3293 | "obsolete use of designated initializer with %<:%>"); |
27bf414c JM |
3294 | c_parser_consume_token (parser); |
3295 | c_parser_consume_token (parser); | |
3296 | } | |
3297 | else | |
3298 | { | |
3299 | /* des_seen is 0 if there have been no designators, 1 if there | |
3300 | has been a single array designator and 2 otherwise. */ | |
3301 | int des_seen = 0; | |
c7412148 | 3302 | /* Location of a designator. */ |
922f2908 | 3303 | location_t des_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3304 | while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE) |
3305 | || c_parser_next_token_is (parser, CPP_DOT)) | |
3306 | { | |
3307 | int des_prev = des_seen; | |
c7412148 TT |
3308 | if (!des_seen) |
3309 | des_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3310 | if (des_seen < 2) |
3311 | des_seen++; | |
3312 | if (c_parser_next_token_is (parser, CPP_DOT)) | |
3313 | { | |
3314 | des_seen = 2; | |
3315 | c_parser_consume_token (parser); | |
3316 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
3317 | { | |
a1e3b3d9 LB |
3318 | set_init_label (c_parser_peek_token (parser)->value, |
3319 | braced_init_obstack); | |
27bf414c JM |
3320 | c_parser_consume_token (parser); |
3321 | } | |
3322 | else | |
3323 | { | |
3324 | struct c_expr init; | |
3325 | init.value = error_mark_node; | |
3326 | init.original_code = ERROR_MARK; | |
6866c6e8 | 3327 | init.original_type = NULL; |
27bf414c JM |
3328 | c_parser_error (parser, "expected identifier"); |
3329 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
a1e3b3d9 | 3330 | process_init_element (init, false, braced_init_obstack); |
27bf414c JM |
3331 | return; |
3332 | } | |
3333 | } | |
3334 | else | |
3335 | { | |
3336 | tree first, second; | |
922f2908 | 3337 | location_t ellipsis_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3338 | /* ??? Following the old parser, [ objc-receiver |
3339 | objc-message-args ] is accepted as an initializer, | |
3340 | being distinguished from a designator by what follows | |
3341 | the first assignment expression inside the square | |
3342 | brackets, but after a first array designator a | |
3343 | subsequent square bracket is for Objective-C taken to | |
3344 | start an expression, using the obsolete form of | |
3345 | designated initializer without '=', rather than | |
3346 | possibly being a second level of designation: in LALR | |
3347 | terms, the '[' is shifted rather than reducing | |
3348 | designator to designator-list. */ | |
3349 | if (des_prev == 1 && c_dialect_objc ()) | |
3350 | { | |
3351 | des_seen = des_prev; | |
3352 | break; | |
3353 | } | |
3354 | if (des_prev == 0 && c_dialect_objc ()) | |
3355 | { | |
3356 | /* This might be an array designator or an | |
3357 | Objective-C message expression. If the former, | |
3358 | continue parsing here; if the latter, parse the | |
3359 | remainder of the initializer given the starting | |
3360 | primary-expression. ??? It might make sense to | |
3361 | distinguish when des_prev == 1 as well; see | |
3362 | previous comment. */ | |
3363 | tree rec, args; | |
3364 | struct c_expr mexpr; | |
3365 | c_parser_consume_token (parser); | |
3366 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
3367 | && ((c_parser_peek_token (parser)->id_kind | |
3368 | == C_ID_TYPENAME) | |
3369 | || (c_parser_peek_token (parser)->id_kind | |
3370 | == C_ID_CLASSNAME))) | |
3371 | { | |
3372 | /* Type name receiver. */ | |
3373 | tree id = c_parser_peek_token (parser)->value; | |
3374 | c_parser_consume_token (parser); | |
3375 | rec = objc_get_class_reference (id); | |
3376 | goto parse_message_args; | |
3377 | } | |
3378 | first = c_parser_expr_no_commas (parser, NULL).value; | |
ebfbbdc5 | 3379 | mark_exp_read (first); |
27bf414c JM |
3380 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS) |
3381 | || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3382 | goto array_desig_after_first; | |
3383 | /* Expression receiver. So far only one part | |
3384 | without commas has been parsed; there might be | |
3385 | more of the expression. */ | |
3386 | rec = first; | |
3387 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
3388 | { | |
f2a71bbc | 3389 | struct c_expr next; |
c2255bc4 AH |
3390 | location_t comma_loc, exp_loc; |
3391 | comma_loc = c_parser_peek_token (parser)->location; | |
27bf414c | 3392 | c_parser_consume_token (parser); |
c2255bc4 | 3393 | exp_loc = c_parser_peek_token (parser)->location; |
f2a71bbc | 3394 | next = c_parser_expr_no_commas (parser, NULL); |
ebfbbdc5 JJ |
3395 | next = default_function_array_read_conversion (exp_loc, |
3396 | next); | |
c2255bc4 | 3397 | rec = build_compound_expr (comma_loc, rec, next.value); |
27bf414c JM |
3398 | } |
3399 | parse_message_args: | |
3400 | /* Now parse the objc-message-args. */ | |
3401 | args = c_parser_objc_message_args (parser); | |
3402 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3403 | "expected %<]%>"); | |
3404 | mexpr.value | |
3405 | = objc_build_message_expr (build_tree_list (rec, args)); | |
3406 | mexpr.original_code = ERROR_MARK; | |
6866c6e8 | 3407 | mexpr.original_type = NULL; |
27bf414c JM |
3408 | /* Now parse and process the remainder of the |
3409 | initializer, starting with this message | |
3410 | expression as a primary-expression. */ | |
a1e3b3d9 | 3411 | c_parser_initval (parser, &mexpr, braced_init_obstack); |
27bf414c JM |
3412 | return; |
3413 | } | |
3414 | c_parser_consume_token (parser); | |
3415 | first = c_parser_expr_no_commas (parser, NULL).value; | |
ebfbbdc5 | 3416 | mark_exp_read (first); |
27bf414c JM |
3417 | array_desig_after_first: |
3418 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3419 | { | |
c7412148 | 3420 | ellipsis_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3421 | c_parser_consume_token (parser); |
3422 | second = c_parser_expr_no_commas (parser, NULL).value; | |
ebfbbdc5 | 3423 | mark_exp_read (second); |
27bf414c JM |
3424 | } |
3425 | else | |
3426 | second = NULL_TREE; | |
3427 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3428 | { | |
3429 | c_parser_consume_token (parser); | |
a1e3b3d9 | 3430 | set_init_index (first, second, braced_init_obstack); |
fcf73884 | 3431 | if (second) |
b8698a0f | 3432 | pedwarn (ellipsis_loc, OPT_pedantic, |
509c9d60 | 3433 | "ISO C forbids specifying range of elements to initialize"); |
27bf414c JM |
3434 | } |
3435 | else | |
3436 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3437 | "expected %<]%>"); | |
3438 | } | |
3439 | } | |
3440 | if (des_seen >= 1) | |
3441 | { | |
3442 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
3443 | { | |
fcf73884 | 3444 | if (!flag_isoc99) |
b8698a0f | 3445 | pedwarn (des_loc, OPT_pedantic, |
509c9d60 | 3446 | "ISO C90 forbids specifying subobject to initialize"); |
27bf414c JM |
3447 | c_parser_consume_token (parser); |
3448 | } | |
3449 | else | |
3450 | { | |
3451 | if (des_seen == 1) | |
b8698a0f | 3452 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
509c9d60 | 3453 | "obsolete use of designated initializer without %<=%>"); |
27bf414c JM |
3454 | else |
3455 | { | |
3456 | struct c_expr init; | |
3457 | init.value = error_mark_node; | |
3458 | init.original_code = ERROR_MARK; | |
6866c6e8 | 3459 | init.original_type = NULL; |
27bf414c JM |
3460 | c_parser_error (parser, "expected %<=%>"); |
3461 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
a1e3b3d9 | 3462 | process_init_element (init, false, braced_init_obstack); |
27bf414c JM |
3463 | return; |
3464 | } | |
3465 | } | |
3466 | } | |
3467 | } | |
a1e3b3d9 | 3468 | c_parser_initval (parser, NULL, braced_init_obstack); |
27bf414c JM |
3469 | } |
3470 | ||
3471 | /* Parse a nested initializer; as c_parser_initializer but parses | |
3472 | initializers within braced lists, after any designators have been | |
3473 | applied. If AFTER is not NULL then it is an Objective-C message | |
3474 | expression which is the primary-expression starting the | |
3475 | initializer. */ | |
3476 | ||
3477 | static void | |
a1e3b3d9 LB |
3478 | c_parser_initval (c_parser *parser, struct c_expr *after, |
3479 | struct obstack * braced_init_obstack) | |
27bf414c JM |
3480 | { |
3481 | struct c_expr init; | |
3482 | gcc_assert (!after || c_dialect_objc ()); | |
3483 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after) | |
3484 | init = c_parser_braced_init (parser, NULL_TREE, true); | |
3485 | else | |
46bdb9cf | 3486 | { |
c2255bc4 | 3487 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf JM |
3488 | init = c_parser_expr_no_commas (parser, after); |
3489 | if (init.value != NULL_TREE | |
3490 | && TREE_CODE (init.value) != STRING_CST | |
3491 | && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR) | |
ebfbbdc5 | 3492 | init = default_function_array_read_conversion (loc, init); |
46bdb9cf | 3493 | } |
a1e3b3d9 | 3494 | process_init_element (init, false, braced_init_obstack); |
27bf414c JM |
3495 | } |
3496 | ||
3497 | /* Parse a compound statement (possibly a function body) (C90 6.6.2, | |
3498 | C99 6.8.2). | |
3499 | ||
3500 | compound-statement: | |
3501 | { block-item-list[opt] } | |
3502 | { label-declarations block-item-list } | |
3503 | ||
3504 | block-item-list: | |
3505 | block-item | |
3506 | block-item-list block-item | |
3507 | ||
3508 | block-item: | |
3509 | nested-declaration | |
3510 | statement | |
3511 | ||
3512 | nested-declaration: | |
3513 | declaration | |
3514 | ||
3515 | GNU extensions: | |
3516 | ||
3517 | compound-statement: | |
3518 | { label-declarations block-item-list } | |
3519 | ||
3520 | nested-declaration: | |
3521 | __extension__ nested-declaration | |
3522 | nested-function-definition | |
3523 | ||
3524 | label-declarations: | |
3525 | label-declaration | |
3526 | label-declarations label-declaration | |
3527 | ||
3528 | label-declaration: | |
3529 | __label__ identifier-list ; | |
3530 | ||
3531 | Allowing the mixing of declarations and code is new in C99. The | |
3532 | GNU syntax also permits (not shown above) labels at the end of | |
3533 | compound statements, which yield an error. We don't allow labels | |
3534 | on declarations; this might seem like a natural extension, but | |
3535 | there would be a conflict between attributes on the label and | |
3536 | prefix attributes on the declaration. ??? The syntax follows the | |
3537 | old parser in requiring something after label declarations. | |
3538 | Although they are erroneous if the labels declared aren't defined, | |
953ff289 | 3539 | is it useful for the syntax to be this way? |
b8698a0f | 3540 | |
953ff289 | 3541 | OpenMP: |
b8698a0f | 3542 | |
953ff289 DN |
3543 | block-item: |
3544 | openmp-directive | |
3545 | ||
3546 | openmp-directive: | |
3547 | barrier-directive | |
3548 | flush-directive */ | |
27bf414c JM |
3549 | |
3550 | static tree | |
3551 | c_parser_compound_statement (c_parser *parser) | |
3552 | { | |
3553 | tree stmt; | |
c2255bc4 AH |
3554 | location_t brace_loc; |
3555 | brace_loc = c_parser_peek_token (parser)->location; | |
27bf414c | 3556 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
5600f233 JM |
3557 | { |
3558 | /* Ensure a scope is entered and left anyway to avoid confusion | |
3559 | if we have just prepared to enter a function body. */ | |
3560 | stmt = c_begin_compound_stmt (true); | |
c2255bc4 | 3561 | c_end_compound_stmt (brace_loc, stmt, true); |
5600f233 JM |
3562 | return error_mark_node; |
3563 | } | |
27bf414c JM |
3564 | stmt = c_begin_compound_stmt (true); |
3565 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 3566 | return c_end_compound_stmt (brace_loc, stmt, true); |
27bf414c JM |
3567 | } |
3568 | ||
3569 | /* Parse a compound statement except for the opening brace. This is | |
3570 | used for parsing both compound statements and statement expressions | |
3571 | (which follow different paths to handling the opening). */ | |
3572 | ||
3573 | static void | |
3574 | c_parser_compound_statement_nostart (c_parser *parser) | |
3575 | { | |
3576 | bool last_stmt = false; | |
3577 | bool last_label = false; | |
6ec637a4 | 3578 | bool save_valid_for_pragma = valid_location_for_stdc_pragma_p (); |
3ba09659 | 3579 | location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3580 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) |
3581 | { | |
3582 | c_parser_consume_token (parser); | |
3583 | return; | |
3584 | } | |
6ec637a4 | 3585 | mark_valid_location_for_stdc_pragma (true); |
27bf414c JM |
3586 | if (c_parser_next_token_is_keyword (parser, RID_LABEL)) |
3587 | { | |
3588 | /* Read zero or more forward-declarations for labels that nested | |
3589 | functions can jump to. */ | |
6ec637a4 | 3590 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
3591 | while (c_parser_next_token_is_keyword (parser, RID_LABEL)) |
3592 | { | |
c2255bc4 | 3593 | label_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3594 | c_parser_consume_token (parser); |
3595 | /* Any identifiers, including those declared as type names, | |
3596 | are OK here. */ | |
3597 | while (true) | |
3598 | { | |
3599 | tree label; | |
3600 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
3601 | { | |
3602 | c_parser_error (parser, "expected identifier"); | |
3603 | break; | |
3604 | } | |
3605 | label | |
3606 | = declare_label (c_parser_peek_token (parser)->value); | |
3607 | C_DECLARED_LABEL_FLAG (label) = 1; | |
c2255bc4 | 3608 | add_stmt (build_stmt (label_loc, DECL_EXPR, label)); |
27bf414c JM |
3609 | c_parser_consume_token (parser); |
3610 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
3611 | c_parser_consume_token (parser); | |
3612 | else | |
3613 | break; | |
3614 | } | |
3615 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
3616 | } | |
c2255bc4 | 3617 | pedwarn (label_loc, OPT_pedantic, "ISO C forbids label declarations"); |
27bf414c JM |
3618 | } |
3619 | /* We must now have at least one statement, label or declaration. */ | |
3620 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3621 | { | |
6ec637a4 | 3622 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
27bf414c JM |
3623 | c_parser_error (parser, "expected declaration or statement"); |
3624 | c_parser_consume_token (parser); | |
3625 | return; | |
3626 | } | |
3627 | while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
3628 | { | |
3629 | location_t loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3630 | if (c_parser_next_token_is_keyword (parser, RID_CASE) |
3631 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3632 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3633 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3634 | { | |
c7412148 TT |
3635 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) |
3636 | label_loc = c_parser_peek_2nd_token (parser)->location; | |
3637 | else | |
3638 | label_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3639 | last_label = true; |
3640 | last_stmt = false; | |
6ec637a4 | 3641 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
3642 | c_parser_label (parser); |
3643 | } | |
3644 | else if (!last_label | |
32912286 | 3645 | && c_parser_next_token_starts_declaration (parser)) |
27bf414c JM |
3646 | { |
3647 | last_label = false; | |
6ec637a4 | 3648 | mark_valid_location_for_stdc_pragma (false); |
32912286 | 3649 | c_parser_declaration_or_fndef (parser, true, true, true, true, true); |
fcf73884 | 3650 | if (last_stmt) |
b8698a0f | 3651 | pedwarn_c90 (loc, |
509c9d60 | 3652 | (pedantic && !flag_isoc99) |
fcf73884 MLI |
3653 | ? OPT_pedantic |
3654 | : OPT_Wdeclaration_after_statement, | |
509c9d60 | 3655 | "ISO C90 forbids mixed declarations and code"); |
27bf414c JM |
3656 | last_stmt = false; |
3657 | } | |
3658 | else if (!last_label | |
3659 | && c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
3660 | { | |
3661 | /* __extension__ can start a declaration, but is also an | |
3662 | unary operator that can start an expression. Consume all | |
3663 | but the last of a possible series of __extension__ to | |
3664 | determine which. */ | |
3665 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
3666 | && (c_parser_peek_2nd_token (parser)->keyword | |
3667 | == RID_EXTENSION)) | |
3668 | c_parser_consume_token (parser); | |
32912286 | 3669 | if (c_token_starts_declaration (c_parser_peek_2nd_token (parser))) |
27bf414c JM |
3670 | { |
3671 | int ext; | |
3672 | ext = disable_extension_diagnostics (); | |
3673 | c_parser_consume_token (parser); | |
3674 | last_label = false; | |
6ec637a4 | 3675 | mark_valid_location_for_stdc_pragma (false); |
32912286 JM |
3676 | c_parser_declaration_or_fndef (parser, true, true, true, true, |
3677 | true); | |
27bf414c JM |
3678 | /* Following the old parser, __extension__ does not |
3679 | disable this diagnostic. */ | |
3680 | restore_extension_diagnostics (ext); | |
fcf73884 | 3681 | if (last_stmt) |
509c9d60 | 3682 | pedwarn_c90 (loc, (pedantic && !flag_isoc99) |
fcf73884 MLI |
3683 | ? OPT_pedantic |
3684 | : OPT_Wdeclaration_after_statement, | |
509c9d60 | 3685 | "ISO C90 forbids mixed declarations and code"); |
27bf414c JM |
3686 | last_stmt = false; |
3687 | } | |
3688 | else | |
3689 | goto statement; | |
3690 | } | |
bc4071dd RH |
3691 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
3692 | { | |
3693 | /* External pragmas, and some omp pragmas, are not associated | |
3694 | with regular c code, and so are not to be considered statements | |
3695 | syntactically. This ensures that the user doesn't put them | |
3696 | places that would turn into syntax errors if the directive | |
3697 | were ignored. */ | |
3698 | if (c_parser_pragma (parser, pragma_compound)) | |
3699 | last_label = false, last_stmt = true; | |
3700 | } | |
3701 | else if (c_parser_next_token_is (parser, CPP_EOF)) | |
3702 | { | |
6ec637a4 | 3703 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
bc4071dd RH |
3704 | c_parser_error (parser, "expected declaration or statement"); |
3705 | return; | |
3706 | } | |
b4b56033 MLI |
3707 | else if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
3708 | { | |
b8698a0f | 3709 | if (parser->in_if_block) |
b4b56033 | 3710 | { |
6ec637a4 | 3711 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
3ba09659 | 3712 | error_at (loc, """expected %<}%> before %<else%>"); |
b4b56033 MLI |
3713 | return; |
3714 | } | |
b8698a0f | 3715 | else |
b4b56033 | 3716 | { |
3ba09659 | 3717 | error_at (loc, "%<else%> without a previous %<if%>"); |
b4b56033 MLI |
3718 | c_parser_consume_token (parser); |
3719 | continue; | |
3720 | } | |
3721 | } | |
27bf414c JM |
3722 | else |
3723 | { | |
3724 | statement: | |
3725 | last_label = false; | |
3726 | last_stmt = true; | |
6ec637a4 | 3727 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
3728 | c_parser_statement_after_labels (parser); |
3729 | } | |
2c14ae9a VR |
3730 | |
3731 | parser->error = false; | |
27bf414c JM |
3732 | } |
3733 | if (last_label) | |
3ba09659 | 3734 | error_at (label_loc, "label at end of compound statement"); |
27bf414c | 3735 | c_parser_consume_token (parser); |
6ec637a4 JJ |
3736 | /* Restore the value we started with. */ |
3737 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); | |
27bf414c JM |
3738 | } |
3739 | ||
3740 | /* Parse a label (C90 6.6.1, C99 6.8.1). | |
3741 | ||
3742 | label: | |
3743 | identifier : attributes[opt] | |
3744 | case constant-expression : | |
3745 | default : | |
3746 | ||
3747 | GNU extensions: | |
3748 | ||
3749 | label: | |
3750 | case constant-expression ... constant-expression : | |
3751 | ||
3752 | The use of attributes on labels is a GNU extension. The syntax in | |
3753 | GNU C accepts any expressions without commas, non-constant | |
3754 | expressions being rejected later. */ | |
3755 | ||
3756 | static void | |
3757 | c_parser_label (c_parser *parser) | |
3758 | { | |
3759 | location_t loc1 = c_parser_peek_token (parser)->location; | |
3760 | tree label = NULL_TREE; | |
3761 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) | |
3762 | { | |
3763 | tree exp1, exp2; | |
3764 | c_parser_consume_token (parser); | |
3765 | exp1 = c_parser_expr_no_commas (parser, NULL).value; | |
3766 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
3767 | { | |
3768 | c_parser_consume_token (parser); | |
c2255bc4 | 3769 | label = do_case (loc1, exp1, NULL_TREE); |
27bf414c JM |
3770 | } |
3771 | else if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3772 | { | |
3773 | c_parser_consume_token (parser); | |
3774 | exp2 = c_parser_expr_no_commas (parser, NULL).value; | |
3775 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
c2255bc4 | 3776 | label = do_case (loc1, exp1, exp2); |
27bf414c JM |
3777 | } |
3778 | else | |
3779 | c_parser_error (parser, "expected %<:%> or %<...%>"); | |
3780 | } | |
3781 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
3782 | { | |
3783 | c_parser_consume_token (parser); | |
3784 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
c2255bc4 | 3785 | label = do_case (loc1, NULL_TREE, NULL_TREE); |
27bf414c JM |
3786 | } |
3787 | else | |
3788 | { | |
3789 | tree name = c_parser_peek_token (parser)->value; | |
3790 | tree tlab; | |
27bf414c | 3791 | tree attrs; |
c7412148 | 3792 | location_t loc2 = c_parser_peek_token (parser)->location; |
27bf414c JM |
3793 | gcc_assert (c_parser_next_token_is (parser, CPP_NAME)); |
3794 | c_parser_consume_token (parser); | |
3795 | gcc_assert (c_parser_next_token_is (parser, CPP_COLON)); | |
27bf414c JM |
3796 | c_parser_consume_token (parser); |
3797 | attrs = c_parser_attributes (parser); | |
3798 | tlab = define_label (loc2, name); | |
3799 | if (tlab) | |
3800 | { | |
3801 | decl_attributes (&tlab, attrs, 0); | |
c2255bc4 | 3802 | label = add_stmt (build_stmt (loc1, LABEL_EXPR, tlab)); |
27bf414c JM |
3803 | } |
3804 | } | |
3805 | if (label) | |
3d57f0f0 | 3806 | { |
32912286 | 3807 | if (c_parser_next_token_starts_declaration (parser) |
3d57f0f0 MLI |
3808 | && !(c_parser_next_token_is (parser, CPP_NAME) |
3809 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3810 | { | |
3ba09659 AH |
3811 | error_at (c_parser_peek_token (parser)->location, |
3812 | "a label can only be part of a statement and " | |
3813 | "a declaration is not a statement"); | |
b8698a0f | 3814 | c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false, |
32912286 | 3815 | /*static_assert_ok*/ true, |
3d57f0f0 MLI |
3816 | /*nested*/ true, /*empty_ok*/ false, |
3817 | /*start_attr_ok*/ true); | |
3818 | } | |
3819 | } | |
27bf414c JM |
3820 | } |
3821 | ||
3822 | /* Parse a statement (C90 6.6, C99 6.8). | |
3823 | ||
3824 | statement: | |
3825 | labeled-statement | |
3826 | compound-statement | |
3827 | expression-statement | |
3828 | selection-statement | |
3829 | iteration-statement | |
3830 | jump-statement | |
3831 | ||
3832 | labeled-statement: | |
3833 | label statement | |
3834 | ||
3835 | expression-statement: | |
3836 | expression[opt] ; | |
3837 | ||
3838 | selection-statement: | |
3839 | if-statement | |
3840 | switch-statement | |
3841 | ||
3842 | iteration-statement: | |
3843 | while-statement | |
3844 | do-statement | |
3845 | for-statement | |
3846 | ||
3847 | jump-statement: | |
3848 | goto identifier ; | |
3849 | continue ; | |
3850 | break ; | |
3851 | return expression[opt] ; | |
3852 | ||
3853 | GNU extensions: | |
3854 | ||
3855 | statement: | |
3856 | asm-statement | |
3857 | ||
3858 | jump-statement: | |
3859 | goto * expression ; | |
3860 | ||
3861 | Objective-C: | |
3862 | ||
3863 | statement: | |
3864 | objc-throw-statement | |
3865 | objc-try-catch-statement | |
3866 | objc-synchronized-statement | |
3867 | ||
3868 | objc-throw-statement: | |
3869 | @throw expression ; | |
3870 | @throw ; | |
953ff289 DN |
3871 | |
3872 | OpenMP: | |
3873 | ||
3874 | statement: | |
3875 | openmp-construct | |
3876 | ||
3877 | openmp-construct: | |
3878 | parallel-construct | |
3879 | for-construct | |
3880 | sections-construct | |
3881 | single-construct | |
3882 | parallel-for-construct | |
3883 | parallel-sections-construct | |
3884 | master-construct | |
3885 | critical-construct | |
3886 | atomic-construct | |
3887 | ordered-construct | |
3888 | ||
3889 | parallel-construct: | |
3890 | parallel-directive structured-block | |
3891 | ||
3892 | for-construct: | |
3893 | for-directive iteration-statement | |
3894 | ||
3895 | sections-construct: | |
3896 | sections-directive section-scope | |
3897 | ||
3898 | single-construct: | |
3899 | single-directive structured-block | |
3900 | ||
3901 | parallel-for-construct: | |
3902 | parallel-for-directive iteration-statement | |
3903 | ||
3904 | parallel-sections-construct: | |
3905 | parallel-sections-directive section-scope | |
3906 | ||
3907 | master-construct: | |
3908 | master-directive structured-block | |
3909 | ||
3910 | critical-construct: | |
3911 | critical-directive structured-block | |
3912 | ||
3913 | atomic-construct: | |
3914 | atomic-directive expression-statement | |
3915 | ||
3916 | ordered-construct: | |
3917 | ordered-directive structured-block */ | |
27bf414c JM |
3918 | |
3919 | static void | |
3920 | c_parser_statement (c_parser *parser) | |
3921 | { | |
3922 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
3923 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3924 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3925 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3926 | c_parser_label (parser); | |
3927 | c_parser_statement_after_labels (parser); | |
3928 | } | |
3929 | ||
3930 | /* Parse a statement, other than a labeled statement. */ | |
3931 | ||
3932 | static void | |
3933 | c_parser_statement_after_labels (c_parser *parser) | |
3934 | { | |
3935 | location_t loc = c_parser_peek_token (parser)->location; | |
3936 | tree stmt = NULL_TREE; | |
b4b56033 MLI |
3937 | bool in_if_block = parser->in_if_block; |
3938 | parser->in_if_block = false; | |
27bf414c JM |
3939 | switch (c_parser_peek_token (parser)->type) |
3940 | { | |
3941 | case CPP_OPEN_BRACE: | |
3942 | add_stmt (c_parser_compound_statement (parser)); | |
3943 | break; | |
3944 | case CPP_KEYWORD: | |
3945 | switch (c_parser_peek_token (parser)->keyword) | |
3946 | { | |
3947 | case RID_IF: | |
3948 | c_parser_if_statement (parser); | |
3949 | break; | |
3950 | case RID_SWITCH: | |
3951 | c_parser_switch_statement (parser); | |
3952 | break; | |
3953 | case RID_WHILE: | |
3954 | c_parser_while_statement (parser); | |
3955 | break; | |
3956 | case RID_DO: | |
3957 | c_parser_do_statement (parser); | |
3958 | break; | |
3959 | case RID_FOR: | |
3960 | c_parser_for_statement (parser); | |
3961 | break; | |
3962 | case RID_GOTO: | |
3963 | c_parser_consume_token (parser); | |
3964 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
3965 | { | |
c2255bc4 AH |
3966 | stmt = c_finish_goto_label (loc, |
3967 | c_parser_peek_token (parser)->value); | |
27bf414c JM |
3968 | c_parser_consume_token (parser); |
3969 | } | |
3970 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
3971 | { | |
3972 | c_parser_consume_token (parser); | |
c2255bc4 AH |
3973 | stmt = c_finish_goto_ptr (loc, |
3974 | c_parser_expression (parser).value); | |
27bf414c JM |
3975 | } |
3976 | else | |
3977 | c_parser_error (parser, "expected identifier or %<*%>"); | |
3978 | goto expect_semicolon; | |
3979 | case RID_CONTINUE: | |
3980 | c_parser_consume_token (parser); | |
c2255bc4 | 3981 | stmt = c_finish_bc_stmt (loc, &c_cont_label, false); |
27bf414c JM |
3982 | goto expect_semicolon; |
3983 | case RID_BREAK: | |
3984 | c_parser_consume_token (parser); | |
c2255bc4 | 3985 | stmt = c_finish_bc_stmt (loc, &c_break_label, true); |
27bf414c JM |
3986 | goto expect_semicolon; |
3987 | case RID_RETURN: | |
3988 | c_parser_consume_token (parser); | |
3989 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
3990 | { | |
c2255bc4 | 3991 | stmt = c_finish_return (loc, NULL_TREE, NULL_TREE); |
27bf414c JM |
3992 | c_parser_consume_token (parser); |
3993 | } | |
3994 | else | |
3995 | { | |
bbbbb16a | 3996 | struct c_expr expr = c_parser_expression_conv (parser); |
ebfbbdc5 | 3997 | mark_exp_read (expr.value); |
c2255bc4 | 3998 | stmt = c_finish_return (loc, expr.value, expr.original_type); |
27bf414c JM |
3999 | goto expect_semicolon; |
4000 | } | |
4001 | break; | |
4002 | case RID_ASM: | |
4003 | stmt = c_parser_asm_statement (parser); | |
4004 | break; | |
eea1139b | 4005 | case RID_THROW: |
27bf414c JM |
4006 | gcc_assert (c_dialect_objc ()); |
4007 | c_parser_consume_token (parser); | |
4008 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4009 | { | |
c2255bc4 | 4010 | stmt = objc_build_throw_stmt (loc, NULL_TREE); |
27bf414c JM |
4011 | c_parser_consume_token (parser); |
4012 | } | |
4013 | else | |
4014 | { | |
928c19bb JM |
4015 | tree expr = c_parser_expression (parser).value; |
4016 | expr = c_fully_fold (expr, false, NULL); | |
c2255bc4 | 4017 | stmt = objc_build_throw_stmt (loc, expr); |
27bf414c JM |
4018 | goto expect_semicolon; |
4019 | } | |
4020 | break; | |
eea1139b | 4021 | case RID_TRY: |
27bf414c JM |
4022 | gcc_assert (c_dialect_objc ()); |
4023 | c_parser_objc_try_catch_statement (parser); | |
4024 | break; | |
4025 | case RID_AT_SYNCHRONIZED: | |
4026 | gcc_assert (c_dialect_objc ()); | |
4027 | c_parser_objc_synchronized_statement (parser); | |
4028 | break; | |
4029 | default: | |
4030 | goto expr_stmt; | |
4031 | } | |
4032 | break; | |
4033 | case CPP_SEMICOLON: | |
4034 | c_parser_consume_token (parser); | |
4035 | break; | |
4036 | case CPP_CLOSE_PAREN: | |
4037 | case CPP_CLOSE_SQUARE: | |
4038 | /* Avoid infinite loop in error recovery: | |
4039 | c_parser_skip_until_found stops at a closing nesting | |
4040 | delimiter without consuming it, but here we need to consume | |
4041 | it to proceed further. */ | |
4042 | c_parser_error (parser, "expected statement"); | |
4043 | c_parser_consume_token (parser); | |
4044 | break; | |
bc4071dd RH |
4045 | case CPP_PRAGMA: |
4046 | c_parser_pragma (parser, pragma_stmt); | |
4047 | break; | |
27bf414c JM |
4048 | default: |
4049 | expr_stmt: | |
c2255bc4 | 4050 | stmt = c_finish_expr_stmt (loc, c_parser_expression_conv (parser).value); |
27bf414c JM |
4051 | expect_semicolon: |
4052 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4053 | break; | |
4054 | } | |
4055 | /* Two cases cannot and do not have line numbers associated: If stmt | |
4056 | is degenerate, such as "2;", then stmt is an INTEGER_CST, which | |
4057 | cannot hold line numbers. But that's OK because the statement | |
4058 | will either be changed to a MODIFY_EXPR during gimplification of | |
4059 | the statement expr, or discarded. If stmt was compound, but | |
4060 | without new variables, we will have skipped the creation of a | |
4061 | BIND and will have a bare STATEMENT_LIST. But that's OK because | |
4062 | (recursively) all of the component statements should already have | |
4063 | line numbers assigned. ??? Can we discard no-op statements | |
4064 | earlier? */ | |
c2255bc4 AH |
4065 | if (CAN_HAVE_LOCATION_P (stmt) |
4066 | && EXPR_LOCATION (stmt) == UNKNOWN_LOCATION) | |
4067 | SET_EXPR_LOCATION (stmt, loc); | |
b4b56033 MLI |
4068 | |
4069 | parser->in_if_block = in_if_block; | |
27bf414c JM |
4070 | } |
4071 | ||
ca085fd7 MLI |
4072 | /* Parse the condition from an if, do, while or for statements. */ |
4073 | ||
4074 | static tree | |
4075 | c_parser_condition (c_parser *parser) | |
4076 | { | |
c2255bc4 | 4077 | location_t loc = c_parser_peek_token (parser)->location; |
ca085fd7 | 4078 | tree cond; |
928c19bb JM |
4079 | cond = c_parser_expression_conv (parser).value; |
4080 | cond = c_objc_common_truthvalue_conversion (loc, cond); | |
4081 | cond = c_fully_fold (cond, false, NULL); | |
ca085fd7 MLI |
4082 | if (warn_sequence_point) |
4083 | verify_sequence_points (cond); | |
4084 | return cond; | |
4085 | } | |
4086 | ||
27bf414c JM |
4087 | /* Parse a parenthesized condition from an if, do or while statement. |
4088 | ||
4089 | condition: | |
4090 | ( expression ) | |
4091 | */ | |
4092 | static tree | |
4093 | c_parser_paren_condition (c_parser *parser) | |
4094 | { | |
27bf414c JM |
4095 | tree cond; |
4096 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4097 | return error_mark_node; | |
ca085fd7 | 4098 | cond = c_parser_condition (parser); |
27bf414c JM |
4099 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
4100 | return cond; | |
4101 | } | |
4102 | ||
4103 | /* Parse a statement which is a block in C99. */ | |
4104 | ||
4105 | static tree | |
4106 | c_parser_c99_block_statement (c_parser *parser) | |
4107 | { | |
4108 | tree block = c_begin_compound_stmt (flag_isoc99); | |
c2255bc4 | 4109 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c | 4110 | c_parser_statement (parser); |
c2255bc4 | 4111 | return c_end_compound_stmt (loc, block, flag_isoc99); |
27bf414c JM |
4112 | } |
4113 | ||
b4b56033 MLI |
4114 | /* Parse the body of an if statement. This is just parsing a |
4115 | statement but (a) it is a block in C99, (b) we track whether the | |
4116 | body is an if statement for the sake of -Wparentheses warnings, (c) | |
4117 | we handle an empty body specially for the sake of -Wempty-body | |
4118 | warnings, and (d) we call parser_compound_statement directly | |
4119 | because c_parser_statement_after_labels resets | |
4120 | parser->in_if_block. */ | |
27bf414c JM |
4121 | |
4122 | static tree | |
4123 | c_parser_if_body (c_parser *parser, bool *if_p) | |
4124 | { | |
4125 | tree block = c_begin_compound_stmt (flag_isoc99); | |
c2255bc4 | 4126 | location_t body_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4127 | while (c_parser_next_token_is_keyword (parser, RID_CASE) |
4128 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4129 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4130 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4131 | c_parser_label (parser); | |
4132 | *if_p = c_parser_next_token_is_keyword (parser, RID_IF); | |
62e00e94 | 4133 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
b4b56033 | 4134 | { |
626c34b5 | 4135 | location_t loc = c_parser_peek_token (parser)->location; |
c2255bc4 | 4136 | add_stmt (build_empty_stmt (loc)); |
b4b56033 | 4137 | c_parser_consume_token (parser); |
626c34b5 PB |
4138 | if (!c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4139 | warning_at (loc, OPT_Wempty_body, | |
4140 | "suggest braces around empty body in an %<if%> statement"); | |
b4b56033 MLI |
4141 | } |
4142 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
4143 | add_stmt (c_parser_compound_statement (parser)); | |
4144 | else | |
4145 | c_parser_statement_after_labels (parser); | |
c2255bc4 | 4146 | return c_end_compound_stmt (body_loc, block, flag_isoc99); |
b4b56033 MLI |
4147 | } |
4148 | ||
4149 | /* Parse the else body of an if statement. This is just parsing a | |
4150 | statement but (a) it is a block in C99, (b) we handle an empty body | |
4151 | specially for the sake of -Wempty-body warnings. */ | |
4152 | ||
4153 | static tree | |
4154 | c_parser_else_body (c_parser *parser) | |
4155 | { | |
c2255bc4 | 4156 | location_t else_loc = c_parser_peek_token (parser)->location; |
b4b56033 MLI |
4157 | tree block = c_begin_compound_stmt (flag_isoc99); |
4158 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
4159 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4160 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4161 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4162 | c_parser_label (parser); | |
4163 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4164 | { | |
c2255bc4 AH |
4165 | location_t loc = c_parser_peek_token (parser)->location; |
4166 | warning_at (loc, | |
626c34b5 PB |
4167 | OPT_Wempty_body, |
4168 | "suggest braces around empty body in an %<else%> statement"); | |
c2255bc4 | 4169 | add_stmt (build_empty_stmt (loc)); |
b4b56033 MLI |
4170 | c_parser_consume_token (parser); |
4171 | } | |
b8698a0f | 4172 | else |
b4b56033 | 4173 | c_parser_statement_after_labels (parser); |
c2255bc4 | 4174 | return c_end_compound_stmt (else_loc, block, flag_isoc99); |
27bf414c JM |
4175 | } |
4176 | ||
4177 | /* Parse an if statement (C90 6.6.4, C99 6.8.4). | |
4178 | ||
4179 | if-statement: | |
4180 | if ( expression ) statement | |
4181 | if ( expression ) statement else statement | |
4182 | */ | |
4183 | ||
4184 | static void | |
4185 | c_parser_if_statement (c_parser *parser) | |
4186 | { | |
4187 | tree block; | |
4188 | location_t loc; | |
4189 | tree cond; | |
b4b56033 | 4190 | bool first_if = false; |
27bf414c | 4191 | tree first_body, second_body; |
b4b56033 MLI |
4192 | bool in_if_block; |
4193 | ||
27bf414c JM |
4194 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF)); |
4195 | c_parser_consume_token (parser); | |
4196 | block = c_begin_compound_stmt (flag_isoc99); | |
4197 | loc = c_parser_peek_token (parser)->location; | |
4198 | cond = c_parser_paren_condition (parser); | |
b4b56033 MLI |
4199 | in_if_block = parser->in_if_block; |
4200 | parser->in_if_block = true; | |
27bf414c | 4201 | first_body = c_parser_if_body (parser, &first_if); |
b4b56033 | 4202 | parser->in_if_block = in_if_block; |
27bf414c JM |
4203 | if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4204 | { | |
4205 | c_parser_consume_token (parser); | |
b4b56033 | 4206 | second_body = c_parser_else_body (parser); |
27bf414c JM |
4207 | } |
4208 | else | |
4209 | second_body = NULL_TREE; | |
4210 | c_finish_if_stmt (loc, cond, first_body, second_body, first_if); | |
c2255bc4 | 4211 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4212 | } |
4213 | ||
4214 | /* Parse a switch statement (C90 6.6.4, C99 6.8.4). | |
4215 | ||
4216 | switch-statement: | |
4217 | switch (expression) statement | |
4218 | */ | |
4219 | ||
4220 | static void | |
4221 | c_parser_switch_statement (c_parser *parser) | |
4222 | { | |
4223 | tree block, expr, body, save_break; | |
c2255bc4 AH |
4224 | location_t switch_loc = c_parser_peek_token (parser)->location; |
4225 | location_t switch_cond_loc; | |
27bf414c JM |
4226 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH)); |
4227 | c_parser_consume_token (parser); | |
4228 | block = c_begin_compound_stmt (flag_isoc99); | |
4229 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4230 | { | |
c2255bc4 | 4231 | switch_cond_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4232 | expr = c_parser_expression (parser).value; |
4233 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4234 | } | |
4235 | else | |
c2255bc4 AH |
4236 | { |
4237 | switch_cond_loc = UNKNOWN_LOCATION; | |
4238 | expr = error_mark_node; | |
4239 | } | |
4240 | c_start_case (switch_loc, switch_cond_loc, expr); | |
27bf414c JM |
4241 | save_break = c_break_label; |
4242 | c_break_label = NULL_TREE; | |
4243 | body = c_parser_c99_block_statement (parser); | |
4244 | c_finish_case (body); | |
4245 | if (c_break_label) | |
c2255bc4 AH |
4246 | { |
4247 | location_t here = c_parser_peek_token (parser)->location; | |
4248 | tree t = build1 (LABEL_EXPR, void_type_node, c_break_label); | |
4249 | SET_EXPR_LOCATION (t, here); | |
4250 | add_stmt (t); | |
4251 | } | |
27bf414c | 4252 | c_break_label = save_break; |
c2255bc4 | 4253 | add_stmt (c_end_compound_stmt (switch_loc, block, flag_isoc99)); |
27bf414c JM |
4254 | } |
4255 | ||
4256 | /* Parse a while statement (C90 6.6.5, C99 6.8.5). | |
4257 | ||
4258 | while-statement: | |
4259 | while (expression) statement | |
4260 | */ | |
4261 | ||
4262 | static void | |
4263 | c_parser_while_statement (c_parser *parser) | |
4264 | { | |
4265 | tree block, cond, body, save_break, save_cont; | |
4266 | location_t loc; | |
4267 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE)); | |
4268 | c_parser_consume_token (parser); | |
4269 | block = c_begin_compound_stmt (flag_isoc99); | |
4270 | loc = c_parser_peek_token (parser)->location; | |
4271 | cond = c_parser_paren_condition (parser); | |
4272 | save_break = c_break_label; | |
4273 | c_break_label = NULL_TREE; | |
4274 | save_cont = c_cont_label; | |
4275 | c_cont_label = NULL_TREE; | |
4276 | body = c_parser_c99_block_statement (parser); | |
4277 | c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true); | |
c2255bc4 | 4278 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4279 | c_break_label = save_break; |
4280 | c_cont_label = save_cont; | |
4281 | } | |
4282 | ||
4283 | /* Parse a do statement (C90 6.6.5, C99 6.8.5). | |
4284 | ||
4285 | do-statement: | |
4286 | do statement while ( expression ) ; | |
4287 | */ | |
4288 | ||
4289 | static void | |
4290 | c_parser_do_statement (c_parser *parser) | |
4291 | { | |
4292 | tree block, cond, body, save_break, save_cont, new_break, new_cont; | |
4293 | location_t loc; | |
4294 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO)); | |
4295 | c_parser_consume_token (parser); | |
62e00e94 | 4296 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
3ba09659 AH |
4297 | warning_at (c_parser_peek_token (parser)->location, |
4298 | OPT_Wempty_body, | |
4299 | "suggest braces around empty body in %<do%> statement"); | |
27bf414c JM |
4300 | block = c_begin_compound_stmt (flag_isoc99); |
4301 | loc = c_parser_peek_token (parser)->location; | |
4302 | save_break = c_break_label; | |
4303 | c_break_label = NULL_TREE; | |
4304 | save_cont = c_cont_label; | |
4305 | c_cont_label = NULL_TREE; | |
4306 | body = c_parser_c99_block_statement (parser); | |
4307 | c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>"); | |
4308 | new_break = c_break_label; | |
4309 | c_break_label = save_break; | |
4310 | new_cont = c_cont_label; | |
4311 | c_cont_label = save_cont; | |
4312 | cond = c_parser_paren_condition (parser); | |
4313 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
4314 | c_parser_skip_to_end_of_block_or_statement (parser); | |
4315 | c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false); | |
c2255bc4 | 4316 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4317 | } |
4318 | ||
4319 | /* Parse a for statement (C90 6.6.5, C99 6.8.5). | |
4320 | ||
4321 | for-statement: | |
4322 | for ( expression[opt] ; expression[opt] ; expression[opt] ) statement | |
4323 | for ( nested-declaration expression[opt] ; expression[opt] ) statement | |
4324 | ||
4325 | The form with a declaration is new in C99. | |
4326 | ||
4327 | ??? In accordance with the old parser, the declaration may be a | |
4328 | nested function, which is then rejected in check_for_loop_decls, | |
4329 | but does it make any sense for this to be included in the grammar? | |
4330 | Note in particular that the nested function does not include a | |
4331 | trailing ';', whereas the "declaration" production includes one. | |
4332 | Also, can we reject bad declarations earlier and cheaper than | |
4333 | check_for_loop_decls? */ | |
4334 | ||
4335 | static void | |
4336 | c_parser_for_statement (c_parser *parser) | |
4337 | { | |
4338 | tree block, cond, incr, save_break, save_cont, body; | |
c2255bc4 AH |
4339 | location_t loc = c_parser_peek_token (parser)->location; |
4340 | location_t for_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
4341 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR)); |
4342 | c_parser_consume_token (parser); | |
4343 | block = c_begin_compound_stmt (flag_isoc99); | |
4344 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4345 | { | |
4346 | /* Parse the initialization declaration or expression. */ | |
4347 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4348 | { | |
4349 | c_parser_consume_token (parser); | |
c2255bc4 | 4350 | c_finish_expr_stmt (loc, NULL_TREE); |
27bf414c | 4351 | } |
32912286 | 4352 | else if (c_parser_next_token_starts_declaration (parser)) |
27bf414c | 4353 | { |
32912286 | 4354 | c_parser_declaration_or_fndef (parser, true, true, true, true, true); |
c2255bc4 | 4355 | check_for_loop_decls (for_loc); |
27bf414c JM |
4356 | } |
4357 | else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
4358 | { | |
4359 | /* __extension__ can start a declaration, but is also an | |
4360 | unary operator that can start an expression. Consume all | |
4361 | but the last of a possible series of __extension__ to | |
4362 | determine which. */ | |
4363 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
4364 | && (c_parser_peek_2nd_token (parser)->keyword | |
4365 | == RID_EXTENSION)) | |
4366 | c_parser_consume_token (parser); | |
32912286 | 4367 | if (c_token_starts_declaration (c_parser_peek_2nd_token (parser))) |
27bf414c JM |
4368 | { |
4369 | int ext; | |
4370 | ext = disable_extension_diagnostics (); | |
4371 | c_parser_consume_token (parser); | |
32912286 JM |
4372 | c_parser_declaration_or_fndef (parser, true, true, true, true, |
4373 | true); | |
27bf414c | 4374 | restore_extension_diagnostics (ext); |
c2255bc4 | 4375 | check_for_loop_decls (for_loc); |
27bf414c JM |
4376 | } |
4377 | else | |
4378 | goto init_expr; | |
4379 | } | |
4380 | else | |
4381 | { | |
4382 | init_expr: | |
c2255bc4 | 4383 | c_finish_expr_stmt (loc, c_parser_expression (parser).value); |
27bf414c JM |
4384 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
4385 | } | |
4386 | /* Parse the loop condition. */ | |
27bf414c JM |
4387 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
4388 | { | |
4389 | c_parser_consume_token (parser); | |
4390 | cond = NULL_TREE; | |
4391 | } | |
4392 | else | |
4393 | { | |
ca085fd7 | 4394 | cond = c_parser_condition (parser); |
27bf414c JM |
4395 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
4396 | } | |
4397 | /* Parse the increment expression. */ | |
4398 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
c2255bc4 | 4399 | incr = c_process_expr_stmt (loc, NULL_TREE); |
27bf414c | 4400 | else |
c2255bc4 | 4401 | incr = c_process_expr_stmt (loc, c_parser_expression (parser).value); |
27bf414c JM |
4402 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
4403 | } | |
4404 | else | |
4405 | { | |
4406 | cond = error_mark_node; | |
4407 | incr = error_mark_node; | |
4408 | } | |
4409 | save_break = c_break_label; | |
4410 | c_break_label = NULL_TREE; | |
4411 | save_cont = c_cont_label; | |
4412 | c_cont_label = NULL_TREE; | |
4413 | body = c_parser_c99_block_statement (parser); | |
4414 | c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true); | |
c2255bc4 | 4415 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4416 | c_break_label = save_break; |
4417 | c_cont_label = save_cont; | |
4418 | } | |
4419 | ||
4420 | /* Parse an asm statement, a GNU extension. This is a full-blown asm | |
4421 | statement with inputs, outputs, clobbers, and volatile tag | |
4422 | allowed. | |
4423 | ||
4424 | asm-statement: | |
4425 | asm type-qualifier[opt] ( asm-argument ) ; | |
1c384bf1 | 4426 | asm type-qualifier[opt] goto ( asm-goto-argument ) ; |
27bf414c JM |
4427 | |
4428 | asm-argument: | |
4429 | asm-string-literal | |
4430 | asm-string-literal : asm-operands[opt] | |
4431 | asm-string-literal : asm-operands[opt] : asm-operands[opt] | |
1c384bf1 RH |
4432 | asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt] |
4433 | ||
4434 | asm-goto-argument: | |
4435 | asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \ | |
4436 | : asm-goto-operands | |
27bf414c JM |
4437 | |
4438 | Qualifiers other than volatile are accepted in the syntax but | |
4439 | warned for. */ | |
4440 | ||
4441 | static tree | |
4442 | c_parser_asm_statement (c_parser *parser) | |
4443 | { | |
1c384bf1 RH |
4444 | tree quals, str, outputs, inputs, clobbers, labels, ret; |
4445 | bool simple, is_goto; | |
c2255bc4 | 4446 | location_t asm_loc = c_parser_peek_token (parser)->location; |
1c384bf1 RH |
4447 | int section, nsections; |
4448 | ||
27bf414c JM |
4449 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); |
4450 | c_parser_consume_token (parser); | |
4451 | if (c_parser_next_token_is_keyword (parser, RID_VOLATILE)) | |
4452 | { | |
4453 | quals = c_parser_peek_token (parser)->value; | |
4454 | c_parser_consume_token (parser); | |
4455 | } | |
4456 | else if (c_parser_next_token_is_keyword (parser, RID_CONST) | |
4457 | || c_parser_next_token_is_keyword (parser, RID_RESTRICT)) | |
4458 | { | |
3ba09659 AH |
4459 | warning_at (c_parser_peek_token (parser)->location, |
4460 | 0, | |
4461 | "%E qualifier ignored on asm", | |
4462 | c_parser_peek_token (parser)->value); | |
27bf414c JM |
4463 | quals = NULL_TREE; |
4464 | c_parser_consume_token (parser); | |
4465 | } | |
4466 | else | |
4467 | quals = NULL_TREE; | |
1c384bf1 RH |
4468 | |
4469 | is_goto = false; | |
4470 | if (c_parser_next_token_is_keyword (parser, RID_GOTO)) | |
4471 | { | |
4472 | c_parser_consume_token (parser); | |
4473 | is_goto = true; | |
4474 | } | |
4475 | ||
27bf414c | 4476 | /* ??? Follow the C++ parser rather than using the |
46c2514e TT |
4477 | lex_untranslated_string kludge. */ |
4478 | parser->lex_untranslated_string = true; | |
1c384bf1 RH |
4479 | ret = NULL; |
4480 | ||
27bf414c | 4481 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
1c384bf1 RH |
4482 | goto error; |
4483 | ||
27bf414c | 4484 | str = c_parser_asm_string_literal (parser); |
b85eb797 | 4485 | if (str == NULL_TREE) |
1c384bf1 RH |
4486 | goto error_close_paren; |
4487 | ||
4488 | simple = true; | |
4489 | outputs = NULL_TREE; | |
4490 | inputs = NULL_TREE; | |
4491 | clobbers = NULL_TREE; | |
4492 | labels = NULL_TREE; | |
4493 | ||
4494 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto) | |
4495 | goto done_asm; | |
4496 | ||
4497 | /* Parse each colon-delimited section of operands. */ | |
4498 | nsections = 3 + is_goto; | |
4499 | for (section = 0; section < nsections; ++section) | |
b85eb797 | 4500 | { |
1c384bf1 RH |
4501 | if (!c_parser_require (parser, CPP_COLON, |
4502 | is_goto | |
4503 | ? "expected %<:%>" | |
4504 | : "expected %<:%> or %<)%>")) | |
4505 | goto error_close_paren; | |
4506 | ||
4507 | /* Once past any colon, we're no longer a simple asm. */ | |
4508 | simple = false; | |
4509 | ||
4510 | if ((!c_parser_next_token_is (parser, CPP_COLON) | |
4511 | && !c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
4512 | || section == 3) | |
4513 | switch (section) | |
4514 | { | |
4515 | case 0: | |
4516 | /* For asm goto, we don't allow output operands, but reserve | |
4517 | the slot for a future extension that does allow them. */ | |
4518 | if (!is_goto) | |
4519 | outputs = c_parser_asm_operands (parser, false); | |
4520 | break; | |
4521 | case 1: | |
4522 | inputs = c_parser_asm_operands (parser, true); | |
4523 | break; | |
4524 | case 2: | |
4525 | clobbers = c_parser_asm_clobbers (parser); | |
4526 | break; | |
4527 | case 3: | |
4528 | labels = c_parser_asm_goto_operands (parser); | |
4529 | break; | |
4530 | default: | |
4531 | gcc_unreachable (); | |
4532 | } | |
4533 | ||
4534 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto) | |
4535 | goto done_asm; | |
27bf414c | 4536 | } |
1c384bf1 | 4537 | |
27bf414c | 4538 | done_asm: |
27bf414c JM |
4539 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
4540 | { | |
4541 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
1c384bf1 | 4542 | goto error; |
27bf414c | 4543 | } |
1c384bf1 | 4544 | |
27bf414c JM |
4545 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) |
4546 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1c384bf1 | 4547 | |
c2255bc4 | 4548 | ret = build_asm_stmt (quals, build_asm_expr (asm_loc, str, outputs, inputs, |
1c384bf1 RH |
4549 | clobbers, labels, simple)); |
4550 | ||
4551 | error: | |
4552 | parser->lex_untranslated_string = false; | |
27bf414c | 4553 | return ret; |
1c384bf1 RH |
4554 | |
4555 | error_close_paren: | |
4556 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
4557 | goto error; | |
27bf414c JM |
4558 | } |
4559 | ||
46bdb9cf JM |
4560 | /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but |
4561 | not outputs), apply the default conversion of functions and arrays | |
4562 | to pointers. | |
27bf414c JM |
4563 | |
4564 | asm-operands: | |
4565 | asm-operand | |
4566 | asm-operands , asm-operand | |
4567 | ||
4568 | asm-operand: | |
4569 | asm-string-literal ( expression ) | |
4570 | [ identifier ] asm-string-literal ( expression ) | |
4571 | */ | |
4572 | ||
4573 | static tree | |
46bdb9cf | 4574 | c_parser_asm_operands (c_parser *parser, bool convert_p) |
27bf414c JM |
4575 | { |
4576 | tree list = NULL_TREE; | |
c2255bc4 | 4577 | location_t loc; |
27bf414c JM |
4578 | while (true) |
4579 | { | |
f2a71bbc JM |
4580 | tree name, str; |
4581 | struct c_expr expr; | |
27bf414c JM |
4582 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) |
4583 | { | |
4584 | c_parser_consume_token (parser); | |
4585 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
4586 | { | |
4587 | tree id = c_parser_peek_token (parser)->value; | |
4588 | c_parser_consume_token (parser); | |
4589 | name = build_string (IDENTIFIER_LENGTH (id), | |
4590 | IDENTIFIER_POINTER (id)); | |
4591 | } | |
4592 | else | |
4593 | { | |
4594 | c_parser_error (parser, "expected identifier"); | |
4595 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL); | |
4596 | return NULL_TREE; | |
4597 | } | |
4598 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
4599 | "expected %<]%>"); | |
4600 | } | |
4601 | else | |
4602 | name = NULL_TREE; | |
4603 | str = c_parser_asm_string_literal (parser); | |
4604 | if (str == NULL_TREE) | |
4605 | return NULL_TREE; | |
46c2514e | 4606 | parser->lex_untranslated_string = false; |
27bf414c JM |
4607 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
4608 | { | |
46c2514e | 4609 | parser->lex_untranslated_string = true; |
27bf414c JM |
4610 | return NULL_TREE; |
4611 | } | |
c2255bc4 | 4612 | loc = c_parser_peek_token (parser)->location; |
f2a71bbc | 4613 | expr = c_parser_expression (parser); |
ebfbbdc5 | 4614 | mark_exp_read (expr.value); |
46bdb9cf | 4615 | if (convert_p) |
c2255bc4 | 4616 | expr = default_function_array_conversion (loc, expr); |
928c19bb | 4617 | expr.value = c_fully_fold (expr.value, false, NULL); |
46c2514e | 4618 | parser->lex_untranslated_string = true; |
27bf414c JM |
4619 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
4620 | { | |
4621 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
4622 | return NULL_TREE; | |
4623 | } | |
4624 | list = chainon (list, build_tree_list (build_tree_list (name, str), | |
f2a71bbc | 4625 | expr.value)); |
27bf414c JM |
4626 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
4627 | c_parser_consume_token (parser); | |
4628 | else | |
4629 | break; | |
4630 | } | |
4631 | return list; | |
4632 | } | |
4633 | ||
4634 | /* Parse asm clobbers, a GNU extension. | |
4635 | ||
4636 | asm-clobbers: | |
4637 | asm-string-literal | |
4638 | asm-clobbers , asm-string-literal | |
4639 | */ | |
4640 | ||
4641 | static tree | |
4642 | c_parser_asm_clobbers (c_parser *parser) | |
4643 | { | |
4644 | tree list = NULL_TREE; | |
4645 | while (true) | |
4646 | { | |
4647 | tree str = c_parser_asm_string_literal (parser); | |
4648 | if (str) | |
4649 | list = tree_cons (NULL_TREE, str, list); | |
4650 | else | |
4651 | return NULL_TREE; | |
4652 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
4653 | c_parser_consume_token (parser); | |
4654 | else | |
4655 | break; | |
4656 | } | |
4657 | return list; | |
4658 | } | |
4659 | ||
1c384bf1 | 4660 | /* Parse asm goto labels, a GNU extension. |
b8698a0f | 4661 | |
1c384bf1 RH |
4662 | asm-goto-operands: |
4663 | identifier | |
4664 | asm-goto-operands , identifier | |
4665 | */ | |
4666 | ||
4667 | static tree | |
4668 | c_parser_asm_goto_operands (c_parser *parser) | |
4669 | { | |
4670 | tree list = NULL_TREE; | |
4671 | while (true) | |
4672 | { | |
4673 | tree name, label; | |
4674 | ||
4675 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
4676 | { | |
4677 | c_token *tok = c_parser_peek_token (parser); | |
4678 | name = tok->value; | |
4679 | label = lookup_label_for_goto (tok->location, name); | |
4680 | c_parser_consume_token (parser); | |
4681 | TREE_USED (label) = 1; | |
4682 | } | |
4683 | else | |
4684 | { | |
4685 | c_parser_error (parser, "expected identifier"); | |
4686 | return NULL_TREE; | |
4687 | } | |
4688 | ||
4689 | name = build_string (IDENTIFIER_LENGTH (name), | |
4690 | IDENTIFIER_POINTER (name)); | |
4691 | list = tree_cons (name, label, list); | |
4692 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
4693 | c_parser_consume_token (parser); | |
4694 | else | |
4695 | return nreverse (list); | |
4696 | } | |
4697 | } | |
4698 | ||
27bf414c JM |
4699 | /* Parse an expression other than a compound expression; that is, an |
4700 | assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not | |
4701 | NULL then it is an Objective-C message expression which is the | |
4702 | primary-expression starting the expression as an initializer. | |
4703 | ||
4704 | assignment-expression: | |
4705 | conditional-expression | |
4706 | unary-expression assignment-operator assignment-expression | |
4707 | ||
4708 | assignment-operator: one of | |
4709 | = *= /= %= += -= <<= >>= &= ^= |= | |
4710 | ||
4711 | In GNU C we accept any conditional expression on the LHS and | |
4712 | diagnose the invalid lvalue rather than producing a syntax | |
4713 | error. */ | |
4714 | ||
4715 | static struct c_expr | |
4716 | c_parser_expr_no_commas (c_parser *parser, struct c_expr *after) | |
4717 | { | |
4718 | struct c_expr lhs, rhs, ret; | |
4719 | enum tree_code code; | |
c2255bc4 | 4720 | location_t op_location, exp_location; |
27bf414c JM |
4721 | gcc_assert (!after || c_dialect_objc ()); |
4722 | lhs = c_parser_conditional_expression (parser, after); | |
c9f9eb5d | 4723 | op_location = c_parser_peek_token (parser)->location; |
27bf414c JM |
4724 | switch (c_parser_peek_token (parser)->type) |
4725 | { | |
4726 | case CPP_EQ: | |
4727 | code = NOP_EXPR; | |
4728 | break; | |
4729 | case CPP_MULT_EQ: | |
4730 | code = MULT_EXPR; | |
4731 | break; | |
4732 | case CPP_DIV_EQ: | |
4733 | code = TRUNC_DIV_EXPR; | |
4734 | break; | |
4735 | case CPP_MOD_EQ: | |
4736 | code = TRUNC_MOD_EXPR; | |
4737 | break; | |
4738 | case CPP_PLUS_EQ: | |
4739 | code = PLUS_EXPR; | |
4740 | break; | |
4741 | case CPP_MINUS_EQ: | |
4742 | code = MINUS_EXPR; | |
4743 | break; | |
4744 | case CPP_LSHIFT_EQ: | |
4745 | code = LSHIFT_EXPR; | |
4746 | break; | |
4747 | case CPP_RSHIFT_EQ: | |
4748 | code = RSHIFT_EXPR; | |
4749 | break; | |
4750 | case CPP_AND_EQ: | |
4751 | code = BIT_AND_EXPR; | |
4752 | break; | |
4753 | case CPP_XOR_EQ: | |
4754 | code = BIT_XOR_EXPR; | |
4755 | break; | |
4756 | case CPP_OR_EQ: | |
4757 | code = BIT_IOR_EXPR; | |
4758 | break; | |
4759 | default: | |
4760 | return lhs; | |
4761 | } | |
4762 | c_parser_consume_token (parser); | |
c2255bc4 | 4763 | exp_location = c_parser_peek_token (parser)->location; |
27bf414c | 4764 | rhs = c_parser_expr_no_commas (parser, NULL); |
ebfbbdc5 | 4765 | rhs = default_function_array_read_conversion (exp_location, rhs); |
32e8bb8e | 4766 | ret.value = build_modify_expr (op_location, lhs.value, lhs.original_type, |
c2255bc4 AH |
4767 | code, exp_location, rhs.value, |
4768 | rhs.original_type); | |
27bf414c JM |
4769 | if (code == NOP_EXPR) |
4770 | ret.original_code = MODIFY_EXPR; | |
4771 | else | |
4772 | { | |
4773 | TREE_NO_WARNING (ret.value) = 1; | |
4774 | ret.original_code = ERROR_MARK; | |
4775 | } | |
6866c6e8 | 4776 | ret.original_type = NULL; |
27bf414c JM |
4777 | return ret; |
4778 | } | |
4779 | ||
4780 | /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER | |
4781 | is not NULL then it is an Objective-C message expression which is | |
4782 | the primary-expression starting the expression as an initializer. | |
4783 | ||
4784 | conditional-expression: | |
4785 | logical-OR-expression | |
4786 | logical-OR-expression ? expression : conditional-expression | |
4787 | ||
4788 | GNU extensions: | |
4789 | ||
4790 | conditional-expression: | |
4791 | logical-OR-expression ? : conditional-expression | |
4792 | */ | |
4793 | ||
4794 | static struct c_expr | |
4795 | c_parser_conditional_expression (c_parser *parser, struct c_expr *after) | |
4796 | { | |
4797 | struct c_expr cond, exp1, exp2, ret; | |
744aa42f | 4798 | location_t cond_loc, colon_loc; |
ba47d38d | 4799 | |
27bf414c | 4800 | gcc_assert (!after || c_dialect_objc ()); |
ba47d38d | 4801 | |
27bf414c | 4802 | cond = c_parser_binary_expression (parser, after); |
ba47d38d | 4803 | |
27bf414c JM |
4804 | if (c_parser_next_token_is_not (parser, CPP_QUERY)) |
4805 | return cond; | |
c2255bc4 | 4806 | cond_loc = c_parser_peek_token (parser)->location; |
ebfbbdc5 | 4807 | cond = default_function_array_read_conversion (cond_loc, cond); |
27bf414c JM |
4808 | c_parser_consume_token (parser); |
4809 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
4810 | { | |
8ce94e44 | 4811 | tree eptype = NULL_TREE; |
b8698a0f | 4812 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
509c9d60 | 4813 | "ISO C forbids omitting the middle term of a ?: expression"); |
8ce94e44 JM |
4814 | if (TREE_CODE (cond.value) == EXCESS_PRECISION_EXPR) |
4815 | { | |
4816 | eptype = TREE_TYPE (cond.value); | |
4817 | cond.value = TREE_OPERAND (cond.value, 0); | |
4818 | } | |
27bf414c | 4819 | /* Make sure first operand is calculated only once. */ |
928c19bb | 4820 | exp1.value = c_save_expr (default_conversion (cond.value)); |
8ce94e44 JM |
4821 | if (eptype) |
4822 | exp1.value = build1 (EXCESS_PRECISION_EXPR, eptype, exp1.value); | |
6866c6e8 | 4823 | exp1.original_type = NULL; |
ba47d38d | 4824 | cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value); |
7d882b83 | 4825 | c_inhibit_evaluation_warnings += cond.value == truthvalue_true_node; |
27bf414c JM |
4826 | } |
4827 | else | |
4828 | { | |
4829 | cond.value | |
85498824 | 4830 | = c_objc_common_truthvalue_conversion |
ba47d38d | 4831 | (cond_loc, default_conversion (cond.value)); |
7d882b83 | 4832 | c_inhibit_evaluation_warnings += cond.value == truthvalue_false_node; |
46bdb9cf | 4833 | exp1 = c_parser_expression_conv (parser); |
ebfbbdc5 | 4834 | mark_exp_read (exp1.value); |
7d882b83 ILT |
4835 | c_inhibit_evaluation_warnings += |
4836 | ((cond.value == truthvalue_true_node) | |
4837 | - (cond.value == truthvalue_false_node)); | |
27bf414c | 4838 | } |
744aa42f ILT |
4839 | |
4840 | colon_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
4841 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) |
4842 | { | |
7d882b83 | 4843 | c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node; |
27bf414c JM |
4844 | ret.value = error_mark_node; |
4845 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 4846 | ret.original_type = NULL; |
27bf414c JM |
4847 | return ret; |
4848 | } | |
c2255bc4 AH |
4849 | { |
4850 | location_t exp2_loc = c_parser_peek_token (parser)->location; | |
4851 | exp2 = c_parser_conditional_expression (parser, NULL); | |
ebfbbdc5 | 4852 | exp2 = default_function_array_read_conversion (exp2_loc, exp2); |
c2255bc4 | 4853 | } |
7d882b83 | 4854 | c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node; |
744aa42f | 4855 | ret.value = build_conditional_expr (colon_loc, cond.value, |
928c19bb | 4856 | cond.original_code == C_MAYBE_CONST_EXPR, |
d130ae11 ILT |
4857 | exp1.value, exp1.original_type, |
4858 | exp2.value, exp2.original_type); | |
27bf414c | 4859 | ret.original_code = ERROR_MARK; |
6866c6e8 ILT |
4860 | if (exp1.value == error_mark_node || exp2.value == error_mark_node) |
4861 | ret.original_type = NULL; | |
4862 | else | |
4863 | { | |
4864 | tree t1, t2; | |
4865 | ||
4866 | /* If both sides are enum type, the default conversion will have | |
4867 | made the type of the result be an integer type. We want to | |
4868 | remember the enum types we started with. */ | |
4869 | t1 = exp1.original_type ? exp1.original_type : TREE_TYPE (exp1.value); | |
4870 | t2 = exp2.original_type ? exp2.original_type : TREE_TYPE (exp2.value); | |
4871 | ret.original_type = ((t1 != error_mark_node | |
4872 | && t2 != error_mark_node | |
4873 | && (TYPE_MAIN_VARIANT (t1) | |
4874 | == TYPE_MAIN_VARIANT (t2))) | |
4875 | ? t1 | |
4876 | : NULL); | |
4877 | } | |
27bf414c JM |
4878 | return ret; |
4879 | } | |
4880 | ||
4881 | /* Parse a binary expression; that is, a logical-OR-expression (C90 | |
4882 | 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is | |
4883 | an Objective-C message expression which is the primary-expression | |
4884 | starting the expression as an initializer. | |
4885 | ||
4886 | multiplicative-expression: | |
4887 | cast-expression | |
4888 | multiplicative-expression * cast-expression | |
4889 | multiplicative-expression / cast-expression | |
4890 | multiplicative-expression % cast-expression | |
4891 | ||
4892 | additive-expression: | |
4893 | multiplicative-expression | |
4894 | additive-expression + multiplicative-expression | |
4895 | additive-expression - multiplicative-expression | |
4896 | ||
4897 | shift-expression: | |
4898 | additive-expression | |
4899 | shift-expression << additive-expression | |
4900 | shift-expression >> additive-expression | |
4901 | ||
4902 | relational-expression: | |
4903 | shift-expression | |
4904 | relational-expression < shift-expression | |
4905 | relational-expression > shift-expression | |
4906 | relational-expression <= shift-expression | |
4907 | relational-expression >= shift-expression | |
4908 | ||
4909 | equality-expression: | |
4910 | relational-expression | |
4911 | equality-expression == relational-expression | |
4912 | equality-expression != relational-expression | |
4913 | ||
4914 | AND-expression: | |
4915 | equality-expression | |
4916 | AND-expression & equality-expression | |
4917 | ||
4918 | exclusive-OR-expression: | |
4919 | AND-expression | |
4920 | exclusive-OR-expression ^ AND-expression | |
4921 | ||
4922 | inclusive-OR-expression: | |
4923 | exclusive-OR-expression | |
4924 | inclusive-OR-expression | exclusive-OR-expression | |
4925 | ||
4926 | logical-AND-expression: | |
4927 | inclusive-OR-expression | |
4928 | logical-AND-expression && inclusive-OR-expression | |
4929 | ||
4930 | logical-OR-expression: | |
4931 | logical-AND-expression | |
4932 | logical-OR-expression || logical-AND-expression | |
4933 | */ | |
4934 | ||
4935 | static struct c_expr | |
4936 | c_parser_binary_expression (c_parser *parser, struct c_expr *after) | |
4937 | { | |
4938 | /* A binary expression is parsed using operator-precedence parsing, | |
4939 | with the operands being cast expressions. All the binary | |
4940 | operators are left-associative. Thus a binary expression is of | |
4941 | form: | |
4942 | ||
4943 | E0 op1 E1 op2 E2 ... | |
4944 | ||
4945 | which we represent on a stack. On the stack, the precedence | |
4946 | levels are strictly increasing. When a new operator is | |
4947 | encountered of higher precedence than that at the top of the | |
4948 | stack, it is pushed; its LHS is the top expression, and its RHS | |
4949 | is everything parsed until it is popped. When a new operator is | |
4950 | encountered with precedence less than or equal to that at the top | |
4951 | of the stack, triples E[i-1] op[i] E[i] are popped and replaced | |
4952 | by the result of the operation until the operator at the top of | |
4953 | the stack has lower precedence than the new operator or there is | |
4954 | only one element on the stack; then the top expression is the LHS | |
4955 | of the new operator. In the case of logical AND and OR | |
7d882b83 ILT |
4956 | expressions, we also need to adjust c_inhibit_evaluation_warnings |
4957 | as appropriate when the operators are pushed and popped. */ | |
27bf414c JM |
4958 | |
4959 | /* The precedence levels, where 0 is a dummy lowest level used for | |
4960 | the bottom of the stack. */ | |
4961 | enum prec { | |
4962 | PREC_NONE, | |
4963 | PREC_LOGOR, | |
4964 | PREC_LOGAND, | |
4965 | PREC_BITOR, | |
4966 | PREC_BITXOR, | |
4967 | PREC_BITAND, | |
4968 | PREC_EQ, | |
4969 | PREC_REL, | |
4970 | PREC_SHIFT, | |
4971 | PREC_ADD, | |
4972 | PREC_MULT, | |
4973 | NUM_PRECS | |
4974 | }; | |
4975 | struct { | |
4976 | /* The expression at this stack level. */ | |
4977 | struct c_expr expr; | |
4978 | /* The precedence of the operator on its left, PREC_NONE at the | |
4979 | bottom of the stack. */ | |
4980 | enum prec prec; | |
4981 | /* The operation on its left. */ | |
4982 | enum tree_code op; | |
ca80e52b EB |
4983 | /* The source location of this operation. */ |
4984 | location_t loc; | |
27bf414c JM |
4985 | } stack[NUM_PRECS]; |
4986 | int sp; | |
ba47d38d | 4987 | /* Location of the binary operator. */ |
1f6d0c60 | 4988 | location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
4989 | #define POP \ |
4990 | do { \ | |
4991 | switch (stack[sp].op) \ | |
4992 | { \ | |
4993 | case TRUTH_ANDIF_EXPR: \ | |
7d882b83 ILT |
4994 | c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \ |
4995 | == truthvalue_false_node); \ | |
27bf414c JM |
4996 | break; \ |
4997 | case TRUTH_ORIF_EXPR: \ | |
7d882b83 ILT |
4998 | c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \ |
4999 | == truthvalue_true_node); \ | |
27bf414c JM |
5000 | break; \ |
5001 | default: \ | |
5002 | break; \ | |
5003 | } \ | |
f2a71bbc | 5004 | stack[sp - 1].expr \ |
ebfbbdc5 JJ |
5005 | = default_function_array_read_conversion (stack[sp - 1].loc, \ |
5006 | stack[sp - 1].expr); \ | |
f2a71bbc | 5007 | stack[sp].expr \ |
ebfbbdc5 JJ |
5008 | = default_function_array_read_conversion (stack[sp].loc, \ |
5009 | stack[sp].expr); \ | |
ca80e52b | 5010 | stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \ |
ba47d38d | 5011 | stack[sp].op, \ |
27bf414c JM |
5012 | stack[sp - 1].expr, \ |
5013 | stack[sp].expr); \ | |
5014 | sp--; \ | |
5015 | } while (0) | |
5016 | gcc_assert (!after || c_dialect_objc ()); | |
ca80e52b | 5017 | stack[0].loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5018 | stack[0].expr = c_parser_cast_expression (parser, after); |
5019 | stack[0].prec = PREC_NONE; | |
5020 | sp = 0; | |
5021 | while (true) | |
5022 | { | |
5023 | enum prec oprec; | |
5024 | enum tree_code ocode; | |
5025 | if (parser->error) | |
5026 | goto out; | |
5027 | switch (c_parser_peek_token (parser)->type) | |
5028 | { | |
5029 | case CPP_MULT: | |
5030 | oprec = PREC_MULT; | |
5031 | ocode = MULT_EXPR; | |
5032 | break; | |
5033 | case CPP_DIV: | |
5034 | oprec = PREC_MULT; | |
5035 | ocode = TRUNC_DIV_EXPR; | |
5036 | break; | |
5037 | case CPP_MOD: | |
5038 | oprec = PREC_MULT; | |
5039 | ocode = TRUNC_MOD_EXPR; | |
5040 | break; | |
5041 | case CPP_PLUS: | |
5042 | oprec = PREC_ADD; | |
5043 | ocode = PLUS_EXPR; | |
5044 | break; | |
5045 | case CPP_MINUS: | |
5046 | oprec = PREC_ADD; | |
5047 | ocode = MINUS_EXPR; | |
5048 | break; | |
5049 | case CPP_LSHIFT: | |
5050 | oprec = PREC_SHIFT; | |
5051 | ocode = LSHIFT_EXPR; | |
5052 | break; | |
5053 | case CPP_RSHIFT: | |
5054 | oprec = PREC_SHIFT; | |
5055 | ocode = RSHIFT_EXPR; | |
5056 | break; | |
5057 | case CPP_LESS: | |
5058 | oprec = PREC_REL; | |
5059 | ocode = LT_EXPR; | |
5060 | break; | |
5061 | case CPP_GREATER: | |
5062 | oprec = PREC_REL; | |
5063 | ocode = GT_EXPR; | |
5064 | break; | |
5065 | case CPP_LESS_EQ: | |
5066 | oprec = PREC_REL; | |
5067 | ocode = LE_EXPR; | |
5068 | break; | |
5069 | case CPP_GREATER_EQ: | |
5070 | oprec = PREC_REL; | |
5071 | ocode = GE_EXPR; | |
5072 | break; | |
5073 | case CPP_EQ_EQ: | |
5074 | oprec = PREC_EQ; | |
5075 | ocode = EQ_EXPR; | |
5076 | break; | |
5077 | case CPP_NOT_EQ: | |
5078 | oprec = PREC_EQ; | |
5079 | ocode = NE_EXPR; | |
5080 | break; | |
5081 | case CPP_AND: | |
5082 | oprec = PREC_BITAND; | |
5083 | ocode = BIT_AND_EXPR; | |
5084 | break; | |
5085 | case CPP_XOR: | |
5086 | oprec = PREC_BITXOR; | |
5087 | ocode = BIT_XOR_EXPR; | |
5088 | break; | |
5089 | case CPP_OR: | |
5090 | oprec = PREC_BITOR; | |
5091 | ocode = BIT_IOR_EXPR; | |
5092 | break; | |
5093 | case CPP_AND_AND: | |
5094 | oprec = PREC_LOGAND; | |
5095 | ocode = TRUTH_ANDIF_EXPR; | |
5096 | break; | |
5097 | case CPP_OR_OR: | |
5098 | oprec = PREC_LOGOR; | |
5099 | ocode = TRUTH_ORIF_EXPR; | |
5100 | break; | |
5101 | default: | |
5102 | /* Not a binary operator, so end of the binary | |
5103 | expression. */ | |
5104 | goto out; | |
5105 | } | |
ba47d38d | 5106 | binary_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5107 | c_parser_consume_token (parser); |
5108 | while (oprec <= stack[sp].prec) | |
5109 | POP; | |
5110 | switch (ocode) | |
5111 | { | |
5112 | case TRUTH_ANDIF_EXPR: | |
f2a71bbc | 5113 | stack[sp].expr |
ebfbbdc5 JJ |
5114 | = default_function_array_read_conversion (stack[sp].loc, |
5115 | stack[sp].expr); | |
85498824 | 5116 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
ca80e52b | 5117 | (stack[sp].loc, default_conversion (stack[sp].expr.value)); |
7d882b83 ILT |
5118 | c_inhibit_evaluation_warnings += (stack[sp].expr.value |
5119 | == truthvalue_false_node); | |
27bf414c JM |
5120 | break; |
5121 | case TRUTH_ORIF_EXPR: | |
f2a71bbc | 5122 | stack[sp].expr |
ebfbbdc5 JJ |
5123 | = default_function_array_read_conversion (stack[sp].loc, |
5124 | stack[sp].expr); | |
85498824 | 5125 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
ca80e52b | 5126 | (stack[sp].loc, default_conversion (stack[sp].expr.value)); |
7d882b83 ILT |
5127 | c_inhibit_evaluation_warnings += (stack[sp].expr.value |
5128 | == truthvalue_true_node); | |
27bf414c JM |
5129 | break; |
5130 | default: | |
5131 | break; | |
5132 | } | |
5133 | sp++; | |
ca80e52b | 5134 | stack[sp].loc = binary_loc; |
27bf414c JM |
5135 | stack[sp].expr = c_parser_cast_expression (parser, NULL); |
5136 | stack[sp].prec = oprec; | |
5137 | stack[sp].op = ocode; | |
c2255bc4 | 5138 | stack[sp].loc = binary_loc; |
27bf414c JM |
5139 | } |
5140 | out: | |
5141 | while (sp > 0) | |
5142 | POP; | |
5143 | return stack[0].expr; | |
5144 | #undef POP | |
5145 | } | |
5146 | ||
5147 | /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not | |
5148 | NULL then it is an Objective-C message expression which is the | |
5149 | primary-expression starting the expression as an initializer. | |
5150 | ||
5151 | cast-expression: | |
5152 | unary-expression | |
5153 | ( type-name ) unary-expression | |
5154 | */ | |
5155 | ||
5156 | static struct c_expr | |
5157 | c_parser_cast_expression (c_parser *parser, struct c_expr *after) | |
5158 | { | |
c2255bc4 | 5159 | location_t cast_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5160 | gcc_assert (!after || c_dialect_objc ()); |
5161 | if (after) | |
c2255bc4 AH |
5162 | return c_parser_postfix_expression_after_primary (parser, |
5163 | cast_loc, *after); | |
27bf414c JM |
5164 | /* If the expression begins with a parenthesized type name, it may |
5165 | be either a cast or a compound literal; we need to see whether | |
5166 | the next character is '{' to tell the difference. If not, it is | |
5167 | an unary expression. */ | |
5168 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
5169 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5170 | { | |
5171 | struct c_type_name *type_name; | |
5172 | struct c_expr ret; | |
f2a71bbc | 5173 | struct c_expr expr; |
27bf414c JM |
5174 | c_parser_consume_token (parser); |
5175 | type_name = c_parser_type_name (parser); | |
5176 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5177 | if (type_name == NULL) | |
5178 | { | |
5179 | ret.value = error_mark_node; | |
5180 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 5181 | ret.original_type = NULL; |
27bf414c JM |
5182 | return ret; |
5183 | } | |
33c9159e AH |
5184 | |
5185 | /* Save casted types in the function's used types hash table. */ | |
8d8d1a28 | 5186 | used_types_insert (type_name->specs->type); |
33c9159e | 5187 | |
27bf414c | 5188 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
24b97832 | 5189 | return c_parser_postfix_expression_after_paren_type (parser, type_name, |
c2255bc4 AH |
5190 | cast_loc); |
5191 | { | |
5192 | location_t expr_loc = c_parser_peek_token (parser)->location; | |
5193 | expr = c_parser_cast_expression (parser, NULL); | |
ebfbbdc5 | 5194 | expr = default_function_array_read_conversion (expr_loc, expr); |
c2255bc4 AH |
5195 | } |
5196 | ret.value = c_cast_expr (cast_loc, type_name, expr.value); | |
27bf414c | 5197 | ret.original_code = ERROR_MARK; |
6866c6e8 | 5198 | ret.original_type = NULL; |
27bf414c JM |
5199 | return ret; |
5200 | } | |
5201 | else | |
5202 | return c_parser_unary_expression (parser); | |
5203 | } | |
5204 | ||
5205 | /* Parse an unary expression (C90 6.3.3, C99 6.5.3). | |
5206 | ||
5207 | unary-expression: | |
5208 | postfix-expression | |
5209 | ++ unary-expression | |
5210 | -- unary-expression | |
5211 | unary-operator cast-expression | |
5212 | sizeof unary-expression | |
5213 | sizeof ( type-name ) | |
5214 | ||
5215 | unary-operator: one of | |
5216 | & * + - ~ ! | |
5217 | ||
5218 | GNU extensions: | |
5219 | ||
5220 | unary-expression: | |
5221 | __alignof__ unary-expression | |
5222 | __alignof__ ( type-name ) | |
5223 | && identifier | |
5224 | ||
5225 | unary-operator: one of | |
5226 | __extension__ __real__ __imag__ | |
5227 | ||
5228 | In addition, the GNU syntax treats ++ and -- as unary operators, so | |
5229 | they may be applied to cast expressions with errors for non-lvalues | |
5230 | given later. */ | |
5231 | ||
5232 | static struct c_expr | |
5233 | c_parser_unary_expression (c_parser *parser) | |
5234 | { | |
5235 | int ext; | |
46bdb9cf | 5236 | struct c_expr ret, op; |
c2255bc4 AH |
5237 | location_t op_loc = c_parser_peek_token (parser)->location; |
5238 | location_t exp_loc; | |
6866c6e8 ILT |
5239 | ret.original_code = ERROR_MARK; |
5240 | ret.original_type = NULL; | |
27bf414c JM |
5241 | switch (c_parser_peek_token (parser)->type) |
5242 | { | |
5243 | case CPP_PLUS_PLUS: | |
5244 | c_parser_consume_token (parser); | |
c2255bc4 | 5245 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5246 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5247 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5248 | return parser_build_unary_op (op_loc, PREINCREMENT_EXPR, op); |
27bf414c JM |
5249 | case CPP_MINUS_MINUS: |
5250 | c_parser_consume_token (parser); | |
c2255bc4 | 5251 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5252 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5253 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5254 | return parser_build_unary_op (op_loc, PREDECREMENT_EXPR, op); |
27bf414c JM |
5255 | case CPP_AND: |
5256 | c_parser_consume_token (parser); | |
ebfbbdc5 JJ |
5257 | op = c_parser_cast_expression (parser, NULL); |
5258 | mark_exp_read (op.value); | |
5259 | return parser_build_unary_op (op_loc, ADDR_EXPR, op); | |
27bf414c JM |
5260 | case CPP_MULT: |
5261 | c_parser_consume_token (parser); | |
c2255bc4 | 5262 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5263 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5264 | op = default_function_array_read_conversion (exp_loc, op); |
dd865ef6 | 5265 | ret.value = build_indirect_ref (op_loc, op.value, RO_UNARY_STAR); |
27bf414c JM |
5266 | return ret; |
5267 | case CPP_PLUS: | |
44c21c7f | 5268 | if (!c_dialect_objc () && !in_system_header) |
c2255bc4 | 5269 | warning_at (op_loc, |
3ba09659 AH |
5270 | OPT_Wtraditional, |
5271 | "traditional C rejects the unary plus operator"); | |
c7412148 | 5272 | c_parser_consume_token (parser); |
c2255bc4 | 5273 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5274 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5275 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5276 | return parser_build_unary_op (op_loc, CONVERT_EXPR, op); |
27bf414c JM |
5277 | case CPP_MINUS: |
5278 | c_parser_consume_token (parser); | |
c2255bc4 | 5279 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5280 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5281 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5282 | return parser_build_unary_op (op_loc, NEGATE_EXPR, op); |
27bf414c JM |
5283 | case CPP_COMPL: |
5284 | c_parser_consume_token (parser); | |
c2255bc4 | 5285 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5286 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5287 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5288 | return parser_build_unary_op (op_loc, BIT_NOT_EXPR, op); |
27bf414c JM |
5289 | case CPP_NOT: |
5290 | c_parser_consume_token (parser); | |
c2255bc4 | 5291 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5292 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5293 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5294 | return parser_build_unary_op (op_loc, TRUTH_NOT_EXPR, op); |
27bf414c JM |
5295 | case CPP_AND_AND: |
5296 | /* Refer to the address of a label as a pointer. */ | |
5297 | c_parser_consume_token (parser); | |
5298 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5299 | { | |
5300 | ret.value = finish_label_address_expr | |
c2255bc4 | 5301 | (c_parser_peek_token (parser)->value, op_loc); |
27bf414c | 5302 | c_parser_consume_token (parser); |
27bf414c JM |
5303 | } |
5304 | else | |
5305 | { | |
5306 | c_parser_error (parser, "expected identifier"); | |
5307 | ret.value = error_mark_node; | |
27bf414c | 5308 | } |
43f6dfd3 | 5309 | return ret; |
27bf414c JM |
5310 | case CPP_KEYWORD: |
5311 | switch (c_parser_peek_token (parser)->keyword) | |
5312 | { | |
5313 | case RID_SIZEOF: | |
5314 | return c_parser_sizeof_expression (parser); | |
5315 | case RID_ALIGNOF: | |
5316 | return c_parser_alignof_expression (parser); | |
5317 | case RID_EXTENSION: | |
5318 | c_parser_consume_token (parser); | |
5319 | ext = disable_extension_diagnostics (); | |
5320 | ret = c_parser_cast_expression (parser, NULL); | |
5321 | restore_extension_diagnostics (ext); | |
5322 | return ret; | |
5323 | case RID_REALPART: | |
5324 | c_parser_consume_token (parser); | |
c2255bc4 | 5325 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5326 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5327 | op = default_function_array_conversion (exp_loc, op); |
5328 | return parser_build_unary_op (op_loc, REALPART_EXPR, op); | |
27bf414c JM |
5329 | case RID_IMAGPART: |
5330 | c_parser_consume_token (parser); | |
c2255bc4 | 5331 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5332 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5333 | op = default_function_array_conversion (exp_loc, op); |
5334 | return parser_build_unary_op (op_loc, IMAGPART_EXPR, op); | |
27bf414c JM |
5335 | default: |
5336 | return c_parser_postfix_expression (parser); | |
5337 | } | |
5338 | default: | |
5339 | return c_parser_postfix_expression (parser); | |
5340 | } | |
5341 | } | |
5342 | ||
5343 | /* Parse a sizeof expression. */ | |
5344 | ||
5345 | static struct c_expr | |
5346 | c_parser_sizeof_expression (c_parser *parser) | |
5347 | { | |
5348 | struct c_expr expr; | |
c7412148 | 5349 | location_t expr_loc; |
27bf414c JM |
5350 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF)); |
5351 | c_parser_consume_token (parser); | |
7d882b83 | 5352 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
5353 | in_sizeof++; |
5354 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
5355 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5356 | { | |
5357 | /* Either sizeof ( type-name ) or sizeof unary-expression | |
5358 | starting with a compound literal. */ | |
5359 | struct c_type_name *type_name; | |
5360 | c_parser_consume_token (parser); | |
c7412148 | 5361 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5362 | type_name = c_parser_type_name (parser); |
5363 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5364 | if (type_name == NULL) | |
5365 | { | |
5366 | struct c_expr ret; | |
7d882b83 | 5367 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
5368 | in_sizeof--; |
5369 | ret.value = error_mark_node; | |
5370 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 5371 | ret.original_type = NULL; |
27bf414c JM |
5372 | return ret; |
5373 | } | |
5374 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
5375 | { | |
5376 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
5377 | type_name, |
5378 | expr_loc); | |
27bf414c JM |
5379 | goto sizeof_expr; |
5380 | } | |
5381 | /* sizeof ( type-name ). */ | |
7d882b83 | 5382 | c_inhibit_evaluation_warnings--; |
27bf414c | 5383 | in_sizeof--; |
c2255bc4 | 5384 | return c_expr_sizeof_type (expr_loc, type_name); |
27bf414c JM |
5385 | } |
5386 | else | |
5387 | { | |
c7412148 | 5388 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5389 | expr = c_parser_unary_expression (parser); |
5390 | sizeof_expr: | |
7d882b83 | 5391 | c_inhibit_evaluation_warnings--; |
27bf414c | 5392 | in_sizeof--; |
ebfbbdc5 | 5393 | mark_exp_read (expr.value); |
27bf414c JM |
5394 | if (TREE_CODE (expr.value) == COMPONENT_REF |
5395 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
3ba09659 | 5396 | error_at (expr_loc, "%<sizeof%> applied to a bit-field"); |
c2255bc4 | 5397 | return c_expr_sizeof_expr (expr_loc, expr); |
27bf414c JM |
5398 | } |
5399 | } | |
5400 | ||
5401 | /* Parse an alignof expression. */ | |
5402 | ||
5403 | static struct c_expr | |
5404 | c_parser_alignof_expression (c_parser *parser) | |
5405 | { | |
5406 | struct c_expr expr; | |
c2255bc4 | 5407 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5408 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF)); |
5409 | c_parser_consume_token (parser); | |
7d882b83 | 5410 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
5411 | in_alignof++; |
5412 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
5413 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5414 | { | |
5415 | /* Either __alignof__ ( type-name ) or __alignof__ | |
5416 | unary-expression starting with a compound literal. */ | |
24b97832 | 5417 | location_t loc; |
27bf414c JM |
5418 | struct c_type_name *type_name; |
5419 | struct c_expr ret; | |
5420 | c_parser_consume_token (parser); | |
24b97832 | 5421 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5422 | type_name = c_parser_type_name (parser); |
5423 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5424 | if (type_name == NULL) | |
5425 | { | |
5426 | struct c_expr ret; | |
7d882b83 | 5427 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
5428 | in_alignof--; |
5429 | ret.value = error_mark_node; | |
5430 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 5431 | ret.original_type = NULL; |
27bf414c JM |
5432 | return ret; |
5433 | } | |
5434 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
5435 | { | |
5436 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
5437 | type_name, |
5438 | loc); | |
27bf414c JM |
5439 | goto alignof_expr; |
5440 | } | |
5441 | /* alignof ( type-name ). */ | |
7d882b83 | 5442 | c_inhibit_evaluation_warnings--; |
27bf414c | 5443 | in_alignof--; |
c2255bc4 | 5444 | ret.value = c_alignof (loc, groktypename (type_name, NULL, NULL)); |
27bf414c | 5445 | ret.original_code = ERROR_MARK; |
6866c6e8 | 5446 | ret.original_type = NULL; |
27bf414c JM |
5447 | return ret; |
5448 | } | |
5449 | else | |
5450 | { | |
5451 | struct c_expr ret; | |
5452 | expr = c_parser_unary_expression (parser); | |
5453 | alignof_expr: | |
ebfbbdc5 | 5454 | mark_exp_read (expr.value); |
7d882b83 | 5455 | c_inhibit_evaluation_warnings--; |
27bf414c | 5456 | in_alignof--; |
c2255bc4 | 5457 | ret.value = c_alignof_expr (loc, expr.value); |
27bf414c | 5458 | ret.original_code = ERROR_MARK; |
6866c6e8 | 5459 | ret.original_type = NULL; |
27bf414c JM |
5460 | return ret; |
5461 | } | |
5462 | } | |
5463 | ||
5464 | /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2). | |
5465 | ||
5466 | postfix-expression: | |
5467 | primary-expression | |
5468 | postfix-expression [ expression ] | |
5469 | postfix-expression ( argument-expression-list[opt] ) | |
5470 | postfix-expression . identifier | |
5471 | postfix-expression -> identifier | |
5472 | postfix-expression ++ | |
5473 | postfix-expression -- | |
5474 | ( type-name ) { initializer-list } | |
5475 | ( type-name ) { initializer-list , } | |
5476 | ||
5477 | argument-expression-list: | |
5478 | argument-expression | |
5479 | argument-expression-list , argument-expression | |
5480 | ||
5481 | primary-expression: | |
5482 | identifier | |
5483 | constant | |
5484 | string-literal | |
5485 | ( expression ) | |
5486 | ||
5487 | GNU extensions: | |
5488 | ||
5489 | primary-expression: | |
5490 | __func__ | |
5491 | (treated as a keyword in GNU C) | |
5492 | __FUNCTION__ | |
5493 | __PRETTY_FUNCTION__ | |
5494 | ( compound-statement ) | |
5495 | __builtin_va_arg ( assignment-expression , type-name ) | |
5496 | __builtin_offsetof ( type-name , offsetof-member-designator ) | |
5497 | __builtin_choose_expr ( assignment-expression , | |
5498 | assignment-expression , | |
5499 | assignment-expression ) | |
5500 | __builtin_types_compatible_p ( type-name , type-name ) | |
5501 | ||
5502 | offsetof-member-designator: | |
5503 | identifier | |
5504 | offsetof-member-designator . identifier | |
5505 | offsetof-member-designator [ expression ] | |
5506 | ||
5507 | Objective-C: | |
5508 | ||
5509 | primary-expression: | |
5510 | [ objc-receiver objc-message-args ] | |
5511 | @selector ( objc-selector-arg ) | |
5512 | @protocol ( identifier ) | |
5513 | @encode ( type-name ) | |
5514 | objc-string-literal | |
5515 | */ | |
5516 | ||
5517 | static struct c_expr | |
5518 | c_parser_postfix_expression (c_parser *parser) | |
5519 | { | |
5520 | struct c_expr expr, e1, e2, e3; | |
5521 | struct c_type_name *t1, *t2; | |
c2255bc4 | 5522 | location_t loc = c_parser_peek_token (parser)->location;; |
6866c6e8 ILT |
5523 | expr.original_code = ERROR_MARK; |
5524 | expr.original_type = NULL; | |
27bf414c JM |
5525 | switch (c_parser_peek_token (parser)->type) |
5526 | { | |
5527 | case CPP_NUMBER: | |
754ccf7c | 5528 | expr.value = c_parser_peek_token (parser)->value; |
754ccf7c JJ |
5529 | loc = c_parser_peek_token (parser)->location; |
5530 | c_parser_consume_token (parser); | |
5531 | if (TREE_CODE (expr.value) == FIXED_CST | |
5532 | && !targetm.fixed_point_supported_p ()) | |
5533 | { | |
5534 | error_at (loc, "fixed-point types not supported for this target"); | |
5535 | expr.value = error_mark_node; | |
5536 | } | |
5537 | break; | |
27bf414c | 5538 | case CPP_CHAR: |
b6baa67d KVH |
5539 | case CPP_CHAR16: |
5540 | case CPP_CHAR32: | |
27bf414c JM |
5541 | case CPP_WCHAR: |
5542 | expr.value = c_parser_peek_token (parser)->value; | |
27bf414c JM |
5543 | c_parser_consume_token (parser); |
5544 | break; | |
5545 | case CPP_STRING: | |
b6baa67d KVH |
5546 | case CPP_STRING16: |
5547 | case CPP_STRING32: | |
27bf414c | 5548 | case CPP_WSTRING: |
2c6e3f55 | 5549 | case CPP_UTF8STRING: |
27bf414c JM |
5550 | expr.value = c_parser_peek_token (parser)->value; |
5551 | expr.original_code = STRING_CST; | |
5552 | c_parser_consume_token (parser); | |
5553 | break; | |
5554 | case CPP_OBJC_STRING: | |
5555 | gcc_assert (c_dialect_objc ()); | |
5556 | expr.value | |
5557 | = objc_build_string_object (c_parser_peek_token (parser)->value); | |
27bf414c JM |
5558 | c_parser_consume_token (parser); |
5559 | break; | |
5560 | case CPP_NAME: | |
5561 | if (c_parser_peek_token (parser)->id_kind != C_ID_ID) | |
5562 | { | |
5563 | c_parser_error (parser, "expected expression"); | |
5564 | expr.value = error_mark_node; | |
27bf414c JM |
5565 | break; |
5566 | } | |
5567 | { | |
5568 | tree id = c_parser_peek_token (parser)->value; | |
5569 | c_parser_consume_token (parser); | |
c2255bc4 | 5570 | expr.value = build_external_ref (loc, id, |
27bf414c | 5571 | (c_parser_peek_token (parser)->type |
c2255bc4 | 5572 | == CPP_OPEN_PAREN), |
6866c6e8 | 5573 | &expr.original_type); |
27bf414c JM |
5574 | } |
5575 | break; | |
5576 | case CPP_OPEN_PAREN: | |
5577 | /* A parenthesized expression, statement expression or compound | |
5578 | literal. */ | |
5579 | if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE) | |
5580 | { | |
5581 | /* A statement expression. */ | |
5582 | tree stmt; | |
c2255bc4 | 5583 | location_t brace_loc; |
27bf414c | 5584 | c_parser_consume_token (parser); |
c2255bc4 | 5585 | brace_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5586 | c_parser_consume_token (parser); |
5587 | if (cur_stmt_list == NULL) | |
5588 | { | |
c2255bc4 | 5589 | error_at (loc, "braced-group within expression allowed " |
3ba09659 | 5590 | "only inside a function"); |
27bf414c JM |
5591 | parser->error = true; |
5592 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
5593 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5594 | expr.value = error_mark_node; | |
27bf414c JM |
5595 | break; |
5596 | } | |
5597 | stmt = c_begin_stmt_expr (); | |
5598 | c_parser_compound_statement_nostart (parser); | |
5599 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5600 | "expected %<)%>"); | |
b8698a0f | 5601 | pedwarn (loc, OPT_pedantic, |
509c9d60 | 5602 | "ISO C forbids braced-groups within expressions"); |
c2255bc4 | 5603 | expr.value = c_finish_stmt_expr (brace_loc, stmt); |
82c3c067 | 5604 | mark_exp_read (expr.value); |
27bf414c JM |
5605 | } |
5606 | else if (c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5607 | { | |
5608 | /* A compound literal. ??? Can we actually get here rather | |
5609 | than going directly to | |
5610 | c_parser_postfix_expression_after_paren_type from | |
5611 | elsewhere? */ | |
24b97832 | 5612 | location_t loc; |
27bf414c JM |
5613 | struct c_type_name *type_name; |
5614 | c_parser_consume_token (parser); | |
24b97832 | 5615 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5616 | type_name = c_parser_type_name (parser); |
5617 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5618 | "expected %<)%>"); | |
5619 | if (type_name == NULL) | |
5620 | { | |
5621 | expr.value = error_mark_node; | |
27bf414c JM |
5622 | } |
5623 | else | |
5624 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
5625 | type_name, |
5626 | loc); | |
27bf414c JM |
5627 | } |
5628 | else | |
5629 | { | |
5630 | /* A parenthesized expression. */ | |
5631 | c_parser_consume_token (parser); | |
5632 | expr = c_parser_expression (parser); | |
5633 | if (TREE_CODE (expr.value) == MODIFY_EXPR) | |
5634 | TREE_NO_WARNING (expr.value) = 1; | |
928c19bb JM |
5635 | if (expr.original_code != C_MAYBE_CONST_EXPR) |
5636 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 5637 | /* Don't change EXPR.ORIGINAL_TYPE. */ |
27bf414c JM |
5638 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
5639 | "expected %<)%>"); | |
5640 | } | |
5641 | break; | |
5642 | case CPP_KEYWORD: | |
5643 | switch (c_parser_peek_token (parser)->keyword) | |
5644 | { | |
5645 | case RID_FUNCTION_NAME: | |
5646 | case RID_PRETTY_FUNCTION_NAME: | |
5647 | case RID_C99_FUNCTION_NAME: | |
c2255bc4 | 5648 | expr.value = fname_decl (loc, |
3ba09659 | 5649 | c_parser_peek_token (parser)->keyword, |
27bf414c | 5650 | c_parser_peek_token (parser)->value); |
27bf414c JM |
5651 | c_parser_consume_token (parser); |
5652 | break; | |
5653 | case RID_VA_ARG: | |
5654 | c_parser_consume_token (parser); | |
5655 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5656 | { | |
5657 | expr.value = error_mark_node; | |
27bf414c JM |
5658 | break; |
5659 | } | |
5660 | e1 = c_parser_expr_no_commas (parser, NULL); | |
ebfbbdc5 | 5661 | mark_exp_read (e1.value); |
928c19bb | 5662 | e1.value = c_fully_fold (e1.value, false, NULL); |
27bf414c JM |
5663 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) |
5664 | { | |
5665 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5666 | expr.value = error_mark_node; | |
27bf414c JM |
5667 | break; |
5668 | } | |
72b5577d | 5669 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5670 | t1 = c_parser_type_name (parser); |
5671 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5672 | "expected %<)%>"); | |
5673 | if (t1 == NULL) | |
5674 | { | |
5675 | expr.value = error_mark_node; | |
27bf414c JM |
5676 | } |
5677 | else | |
5678 | { | |
928c19bb | 5679 | tree type_expr = NULL_TREE; |
c2255bc4 AH |
5680 | expr.value = c_build_va_arg (loc, e1.value, |
5681 | groktypename (t1, &type_expr, NULL)); | |
928c19bb JM |
5682 | if (type_expr) |
5683 | { | |
5684 | expr.value = build2 (C_MAYBE_CONST_EXPR, | |
5685 | TREE_TYPE (expr.value), type_expr, | |
5686 | expr.value); | |
5687 | C_MAYBE_CONST_EXPR_NON_CONST (expr.value) = true; | |
5688 | } | |
27bf414c JM |
5689 | } |
5690 | break; | |
5691 | case RID_OFFSETOF: | |
5692 | c_parser_consume_token (parser); | |
5693 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5694 | { | |
5695 | expr.value = error_mark_node; | |
27bf414c JM |
5696 | break; |
5697 | } | |
5698 | t1 = c_parser_type_name (parser); | |
5699 | if (t1 == NULL) | |
5700 | { | |
5701 | expr.value = error_mark_node; | |
27bf414c JM |
5702 | break; |
5703 | } | |
5704 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5705 | { | |
5706 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5707 | expr.value = error_mark_node; | |
27bf414c JM |
5708 | break; |
5709 | } | |
5710 | { | |
928c19bb | 5711 | tree type = groktypename (t1, NULL, NULL); |
27bf414c JM |
5712 | tree offsetof_ref; |
5713 | if (type == error_mark_node) | |
5714 | offsetof_ref = error_mark_node; | |
5715 | else | |
c2255bc4 AH |
5716 | { |
5717 | offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node); | |
5718 | SET_EXPR_LOCATION (offsetof_ref, loc); | |
5719 | } | |
27bf414c JM |
5720 | /* Parse the second argument to __builtin_offsetof. We |
5721 | must have one identifier, and beyond that we want to | |
5722 | accept sub structure and sub array references. */ | |
5723 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5724 | { | |
5725 | offsetof_ref = build_component_ref | |
c2255bc4 | 5726 | (loc, offsetof_ref, c_parser_peek_token (parser)->value); |
27bf414c JM |
5727 | c_parser_consume_token (parser); |
5728 | while (c_parser_next_token_is (parser, CPP_DOT) | |
5729 | || c_parser_next_token_is (parser, | |
634b5df5 JJ |
5730 | CPP_OPEN_SQUARE) |
5731 | || c_parser_next_token_is (parser, | |
5732 | CPP_DEREF)) | |
27bf414c | 5733 | { |
634b5df5 JJ |
5734 | if (c_parser_next_token_is (parser, CPP_DEREF)) |
5735 | { | |
5736 | loc = c_parser_peek_token (parser)->location; | |
c2255bc4 AH |
5737 | offsetof_ref = build_array_ref (loc, |
5738 | offsetof_ref, | |
5739 | integer_zero_node); | |
634b5df5 JJ |
5740 | goto do_dot; |
5741 | } | |
5742 | else if (c_parser_next_token_is (parser, CPP_DOT)) | |
27bf414c | 5743 | { |
634b5df5 | 5744 | do_dot: |
27bf414c JM |
5745 | c_parser_consume_token (parser); |
5746 | if (c_parser_next_token_is_not (parser, | |
5747 | CPP_NAME)) | |
5748 | { | |
5749 | c_parser_error (parser, "expected identifier"); | |
5750 | break; | |
5751 | } | |
5752 | offsetof_ref = build_component_ref | |
c2255bc4 | 5753 | (loc, offsetof_ref, |
27bf414c JM |
5754 | c_parser_peek_token (parser)->value); |
5755 | c_parser_consume_token (parser); | |
5756 | } | |
5757 | else | |
5758 | { | |
5759 | tree idx; | |
6a3799eb | 5760 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5761 | c_parser_consume_token (parser); |
5762 | idx = c_parser_expression (parser).value; | |
928c19bb | 5763 | idx = c_fully_fold (idx, false, NULL); |
27bf414c JM |
5764 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, |
5765 | "expected %<]%>"); | |
c2255bc4 | 5766 | offsetof_ref = build_array_ref (loc, offsetof_ref, idx); |
27bf414c JM |
5767 | } |
5768 | } | |
5769 | } | |
5770 | else | |
5771 | c_parser_error (parser, "expected identifier"); | |
5772 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5773 | "expected %<)%>"); | |
6d4d7b0e | 5774 | expr.value = fold_offsetof (offsetof_ref, NULL_TREE); |
27bf414c JM |
5775 | } |
5776 | break; | |
5777 | case RID_CHOOSE_EXPR: | |
5778 | c_parser_consume_token (parser); | |
5779 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5780 | { | |
5781 | expr.value = error_mark_node; | |
27bf414c JM |
5782 | break; |
5783 | } | |
c7412148 | 5784 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5785 | e1 = c_parser_expr_no_commas (parser, NULL); |
5786 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5787 | { | |
5788 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5789 | expr.value = error_mark_node; | |
27bf414c JM |
5790 | break; |
5791 | } | |
5792 | e2 = c_parser_expr_no_commas (parser, NULL); | |
5793 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5794 | { | |
5795 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5796 | expr.value = error_mark_node; | |
27bf414c JM |
5797 | break; |
5798 | } | |
5799 | e3 = c_parser_expr_no_commas (parser, NULL); | |
5800 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5801 | "expected %<)%>"); | |
5802 | { | |
5803 | tree c; | |
5804 | ||
4d84fe7c | 5805 | c = e1.value; |
ebfbbdc5 JJ |
5806 | mark_exp_read (e2.value); |
5807 | mark_exp_read (e3.value); | |
928c19bb JM |
5808 | if (TREE_CODE (c) != INTEGER_CST |
5809 | || !INTEGRAL_TYPE_P (TREE_TYPE (c))) | |
3ba09659 AH |
5810 | error_at (loc, |
5811 | "first argument to %<__builtin_choose_expr%> not" | |
5812 | " a constant"); | |
928c19bb | 5813 | constant_expression_warning (c); |
27bf414c JM |
5814 | expr = integer_zerop (c) ? e3 : e2; |
5815 | } | |
5816 | break; | |
5817 | case RID_TYPES_COMPATIBLE_P: | |
5818 | c_parser_consume_token (parser); | |
5819 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5820 | { | |
5821 | expr.value = error_mark_node; | |
27bf414c JM |
5822 | break; |
5823 | } | |
5824 | t1 = c_parser_type_name (parser); | |
5825 | if (t1 == NULL) | |
5826 | { | |
5827 | expr.value = error_mark_node; | |
27bf414c JM |
5828 | break; |
5829 | } | |
5830 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5831 | { | |
5832 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5833 | expr.value = error_mark_node; | |
27bf414c JM |
5834 | break; |
5835 | } | |
5836 | t2 = c_parser_type_name (parser); | |
5837 | if (t2 == NULL) | |
5838 | { | |
5839 | expr.value = error_mark_node; | |
27bf414c JM |
5840 | break; |
5841 | } | |
5842 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5843 | "expected %<)%>"); | |
5844 | { | |
5845 | tree e1, e2; | |
5846 | ||
928c19bb JM |
5847 | e1 = TYPE_MAIN_VARIANT (groktypename (t1, NULL, NULL)); |
5848 | e2 = TYPE_MAIN_VARIANT (groktypename (t2, NULL, NULL)); | |
27bf414c JM |
5849 | |
5850 | expr.value = comptypes (e1, e2) | |
5851 | ? build_int_cst (NULL_TREE, 1) | |
5852 | : build_int_cst (NULL_TREE, 0); | |
27bf414c JM |
5853 | } |
5854 | break; | |
5855 | case RID_AT_SELECTOR: | |
5856 | gcc_assert (c_dialect_objc ()); | |
5857 | c_parser_consume_token (parser); | |
5858 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5859 | { | |
5860 | expr.value = error_mark_node; | |
27bf414c JM |
5861 | break; |
5862 | } | |
5863 | { | |
5864 | tree sel = c_parser_objc_selector_arg (parser); | |
5865 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5866 | "expected %<)%>"); | |
c2255bc4 | 5867 | expr.value = objc_build_selector_expr (loc, sel); |
27bf414c JM |
5868 | } |
5869 | break; | |
5870 | case RID_AT_PROTOCOL: | |
5871 | gcc_assert (c_dialect_objc ()); | |
5872 | c_parser_consume_token (parser); | |
5873 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5874 | { | |
5875 | expr.value = error_mark_node; | |
27bf414c JM |
5876 | break; |
5877 | } | |
5878 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5879 | { | |
5880 | c_parser_error (parser, "expected identifier"); | |
5881 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5882 | expr.value = error_mark_node; | |
27bf414c JM |
5883 | break; |
5884 | } | |
5885 | { | |
5886 | tree id = c_parser_peek_token (parser)->value; | |
5887 | c_parser_consume_token (parser); | |
5888 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5889 | "expected %<)%>"); | |
5890 | expr.value = objc_build_protocol_expr (id); | |
27bf414c JM |
5891 | } |
5892 | break; | |
5893 | case RID_AT_ENCODE: | |
5894 | /* Extension to support C-structures in the archiver. */ | |
5895 | gcc_assert (c_dialect_objc ()); | |
5896 | c_parser_consume_token (parser); | |
5897 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5898 | { | |
5899 | expr.value = error_mark_node; | |
27bf414c JM |
5900 | break; |
5901 | } | |
5902 | t1 = c_parser_type_name (parser); | |
5903 | if (t1 == NULL) | |
5904 | { | |
5905 | expr.value = error_mark_node; | |
27bf414c JM |
5906 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
5907 | break; | |
5908 | } | |
5909 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5910 | "expected %<)%>"); | |
5911 | { | |
928c19bb | 5912 | tree type = groktypename (t1, NULL, NULL); |
27bf414c | 5913 | expr.value = objc_build_encode_expr (type); |
27bf414c JM |
5914 | } |
5915 | break; | |
5916 | default: | |
5917 | c_parser_error (parser, "expected expression"); | |
5918 | expr.value = error_mark_node; | |
27bf414c JM |
5919 | break; |
5920 | } | |
5921 | break; | |
5922 | case CPP_OPEN_SQUARE: | |
5923 | if (c_dialect_objc ()) | |
5924 | { | |
5925 | tree receiver, args; | |
5926 | c_parser_consume_token (parser); | |
5927 | receiver = c_parser_objc_receiver (parser); | |
5928 | args = c_parser_objc_message_args (parser); | |
5929 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
5930 | "expected %<]%>"); | |
5931 | expr.value = objc_build_message_expr (build_tree_list (receiver, | |
5932 | args)); | |
27bf414c JM |
5933 | break; |
5934 | } | |
5935 | /* Else fall through to report error. */ | |
5936 | default: | |
5937 | c_parser_error (parser, "expected expression"); | |
5938 | expr.value = error_mark_node; | |
27bf414c JM |
5939 | break; |
5940 | } | |
c2255bc4 | 5941 | return c_parser_postfix_expression_after_primary (parser, loc, expr); |
27bf414c JM |
5942 | } |
5943 | ||
5944 | /* Parse a postfix expression after a parenthesized type name: the | |
5945 | brace-enclosed initializer of a compound literal, possibly followed | |
5946 | by some postfix operators. This is separate because it is not | |
5947 | possible to tell until after the type name whether a cast | |
5948 | expression has a cast or a compound literal, or whether the operand | |
5949 | of sizeof is a parenthesized type name or starts with a compound | |
24b97832 ILT |
5950 | literal. TYPE_LOC is the location where TYPE_NAME starts--the |
5951 | location of the first token after the parentheses around the type | |
5952 | name. */ | |
27bf414c JM |
5953 | |
5954 | static struct c_expr | |
5955 | c_parser_postfix_expression_after_paren_type (c_parser *parser, | |
24b97832 ILT |
5956 | struct c_type_name *type_name, |
5957 | location_t type_loc) | |
27bf414c JM |
5958 | { |
5959 | tree type; | |
5960 | struct c_expr init; | |
928c19bb | 5961 | bool non_const; |
27bf414c | 5962 | struct c_expr expr; |
c7412148 | 5963 | location_t start_loc; |
928c19bb JM |
5964 | tree type_expr = NULL_TREE; |
5965 | bool type_expr_const = true; | |
c2255bc4 | 5966 | check_compound_literal_type (type_loc, type_name); |
27bf414c | 5967 | start_init (NULL_TREE, NULL, 0); |
928c19bb | 5968 | type = groktypename (type_name, &type_expr, &type_expr_const); |
c7412148 | 5969 | start_loc = c_parser_peek_token (parser)->location; |
85cad37c | 5970 | if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type)) |
27bf414c | 5971 | { |
24b97832 | 5972 | error_at (type_loc, "compound literal has variable size"); |
27bf414c JM |
5973 | type = error_mark_node; |
5974 | } | |
5975 | init = c_parser_braced_init (parser, type, false); | |
5976 | finish_init (); | |
5977 | maybe_warn_string_init (type, init); | |
5978 | ||
36c5e70a BE |
5979 | if (type != error_mark_node |
5980 | && !ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type)) | |
5981 | && current_function_decl) | |
5982 | { | |
5983 | error ("compound literal qualified by address-space qualifier"); | |
5984 | type = error_mark_node; | |
5985 | } | |
5986 | ||
fcf73884 | 5987 | if (!flag_isoc99) |
509c9d60 | 5988 | pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals"); |
928c19bb JM |
5989 | non_const = ((init.value && TREE_CODE (init.value) == CONSTRUCTOR) |
5990 | ? CONSTRUCTOR_NON_CONST (init.value) | |
5991 | : init.original_code == C_MAYBE_CONST_EXPR); | |
5992 | non_const |= !type_expr_const; | |
c2255bc4 | 5993 | expr.value = build_compound_literal (start_loc, type, init.value, non_const); |
27bf414c | 5994 | expr.original_code = ERROR_MARK; |
6866c6e8 | 5995 | expr.original_type = NULL; |
928c19bb JM |
5996 | if (type_expr) |
5997 | { | |
5998 | if (TREE_CODE (expr.value) == C_MAYBE_CONST_EXPR) | |
5999 | { | |
6000 | gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr.value) == NULL_TREE); | |
6001 | C_MAYBE_CONST_EXPR_PRE (expr.value) = type_expr; | |
6002 | } | |
6003 | else | |
6004 | { | |
6005 | gcc_assert (!non_const); | |
6006 | expr.value = build2 (C_MAYBE_CONST_EXPR, type, | |
6007 | type_expr, expr.value); | |
6008 | } | |
6009 | } | |
c2255bc4 | 6010 | return c_parser_postfix_expression_after_primary (parser, start_loc, expr); |
27bf414c JM |
6011 | } |
6012 | ||
6013 | /* Parse a postfix expression after the initial primary or compound | |
c2255bc4 AH |
6014 | literal; that is, parse a series of postfix operators. |
6015 | ||
6016 | EXPR_LOC is the location of the primary expression. */ | |
27bf414c JM |
6017 | |
6018 | static struct c_expr | |
6019 | c_parser_postfix_expression_after_primary (c_parser *parser, | |
c2255bc4 | 6020 | location_t expr_loc, |
27bf414c JM |
6021 | struct c_expr expr) |
6022 | { | |
928c19bb | 6023 | struct c_expr orig_expr; |
bbbbb16a ILT |
6024 | tree ident, idx; |
6025 | VEC(tree,gc) *exprlist; | |
6026 | VEC(tree,gc) *origtypes; | |
27bf414c JM |
6027 | while (true) |
6028 | { | |
c2255bc4 | 6029 | location_t op_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
6030 | switch (c_parser_peek_token (parser)->type) |
6031 | { | |
6032 | case CPP_OPEN_SQUARE: | |
6033 | /* Array reference. */ | |
6034 | c_parser_consume_token (parser); | |
6035 | idx = c_parser_expression (parser).value; | |
6036 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
6037 | "expected %<]%>"); | |
c2255bc4 | 6038 | expr.value = build_array_ref (op_loc, expr.value, idx); |
27bf414c | 6039 | expr.original_code = ERROR_MARK; |
6866c6e8 | 6040 | expr.original_type = NULL; |
27bf414c JM |
6041 | break; |
6042 | case CPP_OPEN_PAREN: | |
6043 | /* Function call. */ | |
6044 | c_parser_consume_token (parser); | |
6045 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
bbbbb16a | 6046 | exprlist = NULL; |
27bf414c | 6047 | else |
bbbbb16a | 6048 | exprlist = c_parser_expr_list (parser, true, false, &origtypes); |
27bf414c JM |
6049 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
6050 | "expected %<)%>"); | |
928c19bb | 6051 | orig_expr = expr; |
ebfbbdc5 | 6052 | mark_exp_read (expr.value); |
c2255bc4 AH |
6053 | /* FIXME diagnostics: Ideally we want the FUNCNAME, not the |
6054 | "(" after the FUNCNAME, which is what we have now. */ | |
6055 | expr.value = build_function_call_vec (op_loc, expr.value, exprlist, | |
bbbbb16a | 6056 | origtypes); |
27bf414c | 6057 | expr.original_code = ERROR_MARK; |
928c19bb JM |
6058 | if (TREE_CODE (expr.value) == INTEGER_CST |
6059 | && TREE_CODE (orig_expr.value) == FUNCTION_DECL | |
6060 | && DECL_BUILT_IN_CLASS (orig_expr.value) == BUILT_IN_NORMAL | |
6061 | && DECL_FUNCTION_CODE (orig_expr.value) == BUILT_IN_CONSTANT_P) | |
6062 | expr.original_code = C_MAYBE_CONST_EXPR; | |
6866c6e8 | 6063 | expr.original_type = NULL; |
bbbbb16a ILT |
6064 | if (exprlist != NULL) |
6065 | { | |
c166b898 ILT |
6066 | release_tree_vector (exprlist); |
6067 | release_tree_vector (origtypes); | |
bbbbb16a | 6068 | } |
27bf414c JM |
6069 | break; |
6070 | case CPP_DOT: | |
6071 | /* Structure element reference. */ | |
6072 | c_parser_consume_token (parser); | |
c2255bc4 | 6073 | expr = default_function_array_conversion (expr_loc, expr); |
27bf414c JM |
6074 | if (c_parser_next_token_is (parser, CPP_NAME)) |
6075 | ident = c_parser_peek_token (parser)->value; | |
6076 | else | |
6077 | { | |
6078 | c_parser_error (parser, "expected identifier"); | |
6079 | expr.value = error_mark_node; | |
6080 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 6081 | expr.original_type = NULL; |
27bf414c JM |
6082 | return expr; |
6083 | } | |
6084 | c_parser_consume_token (parser); | |
c2255bc4 | 6085 | expr.value = build_component_ref (op_loc, expr.value, ident); |
27bf414c | 6086 | expr.original_code = ERROR_MARK; |
6866c6e8 ILT |
6087 | if (TREE_CODE (expr.value) != COMPONENT_REF) |
6088 | expr.original_type = NULL; | |
6089 | else | |
6090 | { | |
6091 | /* Remember the original type of a bitfield. */ | |
6092 | tree field = TREE_OPERAND (expr.value, 1); | |
6093 | if (TREE_CODE (field) != FIELD_DECL) | |
6094 | expr.original_type = NULL; | |
6095 | else | |
6096 | expr.original_type = DECL_BIT_FIELD_TYPE (field); | |
6097 | } | |
27bf414c JM |
6098 | break; |
6099 | case CPP_DEREF: | |
6100 | /* Structure element reference. */ | |
6101 | c_parser_consume_token (parser); | |
c2255bc4 | 6102 | expr = default_function_array_conversion (expr_loc, expr); |
27bf414c JM |
6103 | if (c_parser_next_token_is (parser, CPP_NAME)) |
6104 | ident = c_parser_peek_token (parser)->value; | |
6105 | else | |
6106 | { | |
6107 | c_parser_error (parser, "expected identifier"); | |
6108 | expr.value = error_mark_node; | |
6109 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 6110 | expr.original_type = NULL; |
27bf414c JM |
6111 | return expr; |
6112 | } | |
6113 | c_parser_consume_token (parser); | |
c2255bc4 AH |
6114 | expr.value = build_component_ref (op_loc, |
6115 | build_indirect_ref (op_loc, | |
c9f9eb5d | 6116 | expr.value, |
dd865ef6 | 6117 | RO_ARROW), |
6a3799eb | 6118 | ident); |
27bf414c | 6119 | expr.original_code = ERROR_MARK; |
6866c6e8 ILT |
6120 | if (TREE_CODE (expr.value) != COMPONENT_REF) |
6121 | expr.original_type = NULL; | |
6122 | else | |
6123 | { | |
6124 | /* Remember the original type of a bitfield. */ | |
6125 | tree field = TREE_OPERAND (expr.value, 1); | |
6126 | if (TREE_CODE (field) != FIELD_DECL) | |
6127 | expr.original_type = NULL; | |
6128 | else | |
6129 | expr.original_type = DECL_BIT_FIELD_TYPE (field); | |
6130 | } | |
27bf414c JM |
6131 | break; |
6132 | case CPP_PLUS_PLUS: | |
6133 | /* Postincrement. */ | |
6134 | c_parser_consume_token (parser); | |
ebfbbdc5 | 6135 | expr = default_function_array_read_conversion (expr_loc, expr); |
c2255bc4 | 6136 | expr.value = build_unary_op (op_loc, |
c9f9eb5d | 6137 | POSTINCREMENT_EXPR, expr.value, 0); |
27bf414c | 6138 | expr.original_code = ERROR_MARK; |
6866c6e8 | 6139 | expr.original_type = NULL; |
27bf414c JM |
6140 | break; |
6141 | case CPP_MINUS_MINUS: | |
6142 | /* Postdecrement. */ | |
6143 | c_parser_consume_token (parser); | |
ebfbbdc5 | 6144 | expr = default_function_array_read_conversion (expr_loc, expr); |
c2255bc4 | 6145 | expr.value = build_unary_op (op_loc, |
c9f9eb5d | 6146 | POSTDECREMENT_EXPR, expr.value, 0); |
27bf414c | 6147 | expr.original_code = ERROR_MARK; |
6866c6e8 | 6148 | expr.original_type = NULL; |
27bf414c JM |
6149 | break; |
6150 | default: | |
6151 | return expr; | |
6152 | } | |
6153 | } | |
6154 | } | |
6155 | ||
6156 | /* Parse an expression (C90 6.3.17, C99 6.5.17). | |
6157 | ||
6158 | expression: | |
6159 | assignment-expression | |
6160 | expression , assignment-expression | |
6161 | */ | |
6162 | ||
6163 | static struct c_expr | |
6164 | c_parser_expression (c_parser *parser) | |
6165 | { | |
6166 | struct c_expr expr; | |
6167 | expr = c_parser_expr_no_commas (parser, NULL); | |
6168 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
6169 | { | |
6170 | struct c_expr next; | |
056928b2 | 6171 | tree lhsval; |
c2255bc4 AH |
6172 | location_t loc = c_parser_peek_token (parser)->location; |
6173 | location_t expr_loc; | |
27bf414c | 6174 | c_parser_consume_token (parser); |
c2255bc4 | 6175 | expr_loc = c_parser_peek_token (parser)->location; |
056928b2 JJ |
6176 | lhsval = expr.value; |
6177 | while (TREE_CODE (lhsval) == COMPOUND_EXPR) | |
6178 | lhsval = TREE_OPERAND (lhsval, 1); | |
6179 | if (DECL_P (lhsval) || handled_component_p (lhsval)) | |
6180 | mark_exp_read (lhsval); | |
27bf414c | 6181 | next = c_parser_expr_no_commas (parser, NULL); |
c2255bc4 AH |
6182 | next = default_function_array_conversion (expr_loc, next); |
6183 | expr.value = build_compound_expr (loc, expr.value, next.value); | |
27bf414c | 6184 | expr.original_code = COMPOUND_EXPR; |
81f40b79 | 6185 | expr.original_type = next.original_type; |
27bf414c JM |
6186 | } |
6187 | return expr; | |
6188 | } | |
6189 | ||
46bdb9cf JM |
6190 | /* Parse an expression and convert functions or arrays to |
6191 | pointers. */ | |
6192 | ||
6193 | static struct c_expr | |
6194 | c_parser_expression_conv (c_parser *parser) | |
6195 | { | |
6196 | struct c_expr expr; | |
c2255bc4 | 6197 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 6198 | expr = c_parser_expression (parser); |
c2255bc4 | 6199 | expr = default_function_array_conversion (loc, expr); |
46bdb9cf JM |
6200 | return expr; |
6201 | } | |
6202 | ||
6203 | /* Parse a non-empty list of expressions. If CONVERT_P, convert | |
928c19bb | 6204 | functions and arrays to pointers. If FOLD_P, fold the expressions. |
27bf414c JM |
6205 | |
6206 | nonempty-expr-list: | |
6207 | assignment-expression | |
6208 | nonempty-expr-list , assignment-expression | |
6209 | */ | |
6210 | ||
bbbbb16a ILT |
6211 | static VEC(tree,gc) * |
6212 | c_parser_expr_list (c_parser *parser, bool convert_p, bool fold_p, | |
6213 | VEC(tree,gc) **p_orig_types) | |
27bf414c | 6214 | { |
bbbbb16a ILT |
6215 | VEC(tree,gc) *ret; |
6216 | VEC(tree,gc) *orig_types; | |
27bf414c | 6217 | struct c_expr expr; |
c2255bc4 | 6218 | location_t loc = c_parser_peek_token (parser)->location; |
bbbbb16a | 6219 | |
c166b898 | 6220 | ret = make_tree_vector (); |
bbbbb16a ILT |
6221 | if (p_orig_types == NULL) |
6222 | orig_types = NULL; | |
6223 | else | |
c166b898 | 6224 | orig_types = make_tree_vector (); |
bbbbb16a | 6225 | |
27bf414c | 6226 | expr = c_parser_expr_no_commas (parser, NULL); |
46bdb9cf | 6227 | if (convert_p) |
ebfbbdc5 | 6228 | expr = default_function_array_read_conversion (loc, expr); |
928c19bb JM |
6229 | if (fold_p) |
6230 | expr.value = c_fully_fold (expr.value, false, NULL); | |
bbbbb16a ILT |
6231 | VEC_quick_push (tree, ret, expr.value); |
6232 | if (orig_types != NULL) | |
6233 | VEC_quick_push (tree, orig_types, expr.original_type); | |
27bf414c JM |
6234 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
6235 | { | |
6236 | c_parser_consume_token (parser); | |
c2255bc4 | 6237 | loc = c_parser_peek_token (parser)->location; |
27bf414c | 6238 | expr = c_parser_expr_no_commas (parser, NULL); |
46bdb9cf | 6239 | if (convert_p) |
ebfbbdc5 | 6240 | expr = default_function_array_read_conversion (loc, expr); |
928c19bb JM |
6241 | if (fold_p) |
6242 | expr.value = c_fully_fold (expr.value, false, NULL); | |
bbbbb16a ILT |
6243 | VEC_safe_push (tree, gc, ret, expr.value); |
6244 | if (orig_types != NULL) | |
6245 | VEC_safe_push (tree, gc, orig_types, expr.original_type); | |
27bf414c | 6246 | } |
bbbbb16a ILT |
6247 | if (orig_types != NULL) |
6248 | *p_orig_types = orig_types; | |
27bf414c JM |
6249 | return ret; |
6250 | } | |
27bf414c JM |
6251 | \f |
6252 | /* Parse Objective-C-specific constructs. */ | |
6253 | ||
6254 | /* Parse an objc-class-definition. | |
6255 | ||
6256 | objc-class-definition: | |
6257 | @interface identifier objc-superclass[opt] objc-protocol-refs[opt] | |
6258 | objc-class-instance-variables[opt] objc-methodprotolist @end | |
6259 | @implementation identifier objc-superclass[opt] | |
6260 | objc-class-instance-variables[opt] | |
6261 | @interface identifier ( identifier ) objc-protocol-refs[opt] | |
6262 | objc-methodprotolist @end | |
6263 | @implementation identifier ( identifier ) | |
6264 | ||
6265 | objc-superclass: | |
6266 | : identifier | |
6267 | ||
6268 | "@interface identifier (" must start "@interface identifier ( | |
6269 | identifier ) ...": objc-methodprotolist in the first production may | |
0fa2e4df | 6270 | not start with a parenthesized identifier as a declarator of a data |
27bf414c JM |
6271 | definition with no declaration specifiers if the objc-superclass, |
6272 | objc-protocol-refs and objc-class-instance-variables are omitted. */ | |
6273 | ||
6274 | static void | |
6275 | c_parser_objc_class_definition (c_parser *parser) | |
6276 | { | |
6277 | bool iface_p; | |
6278 | tree id1; | |
6279 | tree superclass; | |
6280 | if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE)) | |
6281 | iface_p = true; | |
6282 | else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION)) | |
6283 | iface_p = false; | |
6284 | else | |
6285 | gcc_unreachable (); | |
6286 | c_parser_consume_token (parser); | |
6287 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6288 | { | |
6289 | c_parser_error (parser, "expected identifier"); | |
6290 | return; | |
6291 | } | |
6292 | id1 = c_parser_peek_token (parser)->value; | |
6293 | c_parser_consume_token (parser); | |
6294 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
6295 | { | |
6296 | tree id2; | |
6297 | tree proto = NULL_TREE; | |
6298 | c_parser_consume_token (parser); | |
6299 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6300 | { | |
6301 | c_parser_error (parser, "expected identifier"); | |
6302 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6303 | return; | |
6304 | } | |
6305 | id2 = c_parser_peek_token (parser)->value; | |
6306 | c_parser_consume_token (parser); | |
6307 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6308 | if (!iface_p) | |
6309 | { | |
6310 | objc_start_category_implementation (id1, id2); | |
6311 | return; | |
6312 | } | |
6313 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
6314 | proto = c_parser_objc_protocol_refs (parser); | |
6315 | objc_start_category_interface (id1, id2, proto); | |
6316 | c_parser_objc_methodprotolist (parser); | |
6317 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
6318 | objc_finish_interface (); | |
6319 | return; | |
6320 | } | |
6321 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
6322 | { | |
6323 | c_parser_consume_token (parser); | |
6324 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6325 | { | |
6326 | c_parser_error (parser, "expected identifier"); | |
6327 | return; | |
6328 | } | |
6329 | superclass = c_parser_peek_token (parser)->value; | |
6330 | c_parser_consume_token (parser); | |
6331 | } | |
6332 | else | |
6333 | superclass = NULL_TREE; | |
6334 | if (iface_p) | |
6335 | { | |
6336 | tree proto = NULL_TREE; | |
6337 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
6338 | proto = c_parser_objc_protocol_refs (parser); | |
6339 | objc_start_class_interface (id1, superclass, proto); | |
6340 | } | |
6341 | else | |
6342 | objc_start_class_implementation (id1, superclass); | |
6343 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
6344 | c_parser_objc_class_instance_variables (parser); | |
6345 | if (iface_p) | |
6346 | { | |
6347 | objc_continue_interface (); | |
6348 | c_parser_objc_methodprotolist (parser); | |
6349 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
6350 | objc_finish_interface (); | |
6351 | } | |
6352 | else | |
6353 | { | |
6354 | objc_continue_implementation (); | |
6355 | return; | |
6356 | } | |
6357 | } | |
6358 | ||
6359 | /* Parse objc-class-instance-variables. | |
6360 | ||
6361 | objc-class-instance-variables: | |
6362 | { objc-instance-variable-decl-list[opt] } | |
6363 | ||
6364 | objc-instance-variable-decl-list: | |
6365 | objc-visibility-spec | |
6366 | objc-instance-variable-decl ; | |
6367 | ; | |
6368 | objc-instance-variable-decl-list objc-visibility-spec | |
6369 | objc-instance-variable-decl-list objc-instance-variable-decl ; | |
6370 | objc-instance-variable-decl-list ; | |
6371 | ||
6372 | objc-visibility-spec: | |
6373 | @private | |
6374 | @protected | |
6375 | @public | |
6376 | ||
6377 | objc-instance-variable-decl: | |
6378 | struct-declaration | |
6379 | */ | |
6380 | ||
6381 | static void | |
6382 | c_parser_objc_class_instance_variables (c_parser *parser) | |
6383 | { | |
6384 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); | |
6385 | c_parser_consume_token (parser); | |
6386 | while (c_parser_next_token_is_not (parser, CPP_EOF)) | |
6387 | { | |
6388 | tree decls; | |
6389 | /* Parse any stray semicolon. */ | |
6390 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
6391 | { | |
b8698a0f | 6392 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
509c9d60 | 6393 | "extra semicolon in struct or union specified"); |
27bf414c JM |
6394 | c_parser_consume_token (parser); |
6395 | continue; | |
6396 | } | |
6397 | /* Stop if at the end of the instance variables. */ | |
6398 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
6399 | { | |
6400 | c_parser_consume_token (parser); | |
6401 | break; | |
6402 | } | |
6403 | /* Parse any objc-visibility-spec. */ | |
eea1139b | 6404 | if (c_parser_next_token_is_keyword (parser, RID_PRIVATE)) |
27bf414c JM |
6405 | { |
6406 | c_parser_consume_token (parser); | |
6407 | objc_set_visibility (2); | |
6408 | continue; | |
6409 | } | |
eea1139b | 6410 | else if (c_parser_next_token_is_keyword (parser, RID_PROTECTED)) |
27bf414c JM |
6411 | { |
6412 | c_parser_consume_token (parser); | |
6413 | objc_set_visibility (0); | |
6414 | continue; | |
6415 | } | |
eea1139b | 6416 | else if (c_parser_next_token_is_keyword (parser, RID_PUBLIC)) |
27bf414c JM |
6417 | { |
6418 | c_parser_consume_token (parser); | |
6419 | objc_set_visibility (1); | |
6420 | continue; | |
6421 | } | |
bc4071dd RH |
6422 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
6423 | { | |
6424 | c_parser_pragma (parser, pragma_external); | |
6425 | continue; | |
6426 | } | |
6427 | ||
27bf414c JM |
6428 | /* Parse some comma-separated declarations. */ |
6429 | decls = c_parser_struct_declaration (parser); | |
6430 | { | |
6431 | /* Comma-separated instance variables are chained together in | |
6432 | reverse order; add them one by one. */ | |
6433 | tree ivar = nreverse (decls); | |
6434 | for (; ivar; ivar = TREE_CHAIN (ivar)) | |
6435 | objc_add_instance_variable (copy_node (ivar)); | |
6436 | } | |
6437 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6438 | } | |
6439 | } | |
6440 | ||
6441 | /* Parse an objc-class-declaration. | |
6442 | ||
6443 | objc-class-declaration: | |
6444 | @class identifier-list ; | |
6445 | */ | |
6446 | ||
6447 | static void | |
6448 | c_parser_objc_class_declaration (c_parser *parser) | |
6449 | { | |
6450 | tree list = NULL_TREE; | |
eea1139b | 6451 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_CLASS)); |
27bf414c JM |
6452 | c_parser_consume_token (parser); |
6453 | /* Any identifiers, including those declared as type names, are OK | |
6454 | here. */ | |
6455 | while (true) | |
6456 | { | |
6457 | tree id; | |
6458 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6459 | { | |
6460 | c_parser_error (parser, "expected identifier"); | |
6461 | break; | |
6462 | } | |
6463 | id = c_parser_peek_token (parser)->value; | |
6464 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
6465 | c_parser_consume_token (parser); | |
6466 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
6467 | c_parser_consume_token (parser); | |
6468 | else | |
6469 | break; | |
6470 | } | |
6471 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6472 | objc_declare_class (list); | |
6473 | } | |
6474 | ||
6475 | /* Parse an objc-alias-declaration. | |
6476 | ||
6477 | objc-alias-declaration: | |
6478 | @compatibility_alias identifier identifier ; | |
6479 | */ | |
6480 | ||
6481 | static void | |
6482 | c_parser_objc_alias_declaration (c_parser *parser) | |
6483 | { | |
6484 | tree id1, id2; | |
6485 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS)); | |
6486 | c_parser_consume_token (parser); | |
6487 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6488 | { | |
6489 | c_parser_error (parser, "expected identifier"); | |
6490 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
6491 | return; | |
6492 | } | |
6493 | id1 = c_parser_peek_token (parser)->value; | |
6494 | c_parser_consume_token (parser); | |
6495 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6496 | { | |
6497 | c_parser_error (parser, "expected identifier"); | |
6498 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
6499 | return; | |
6500 | } | |
6501 | id2 = c_parser_peek_token (parser)->value; | |
6502 | c_parser_consume_token (parser); | |
6503 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6504 | objc_declare_alias (id1, id2); | |
6505 | } | |
6506 | ||
6507 | /* Parse an objc-protocol-definition. | |
6508 | ||
6509 | objc-protocol-definition: | |
6510 | @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end | |
6511 | @protocol identifier-list ; | |
6512 | ||
6513 | "@protocol identifier ;" should be resolved as "@protocol | |
6514 | identifier-list ;": objc-methodprotolist may not start with a | |
6515 | semicolon in the first alternative if objc-protocol-refs are | |
6516 | omitted. */ | |
6517 | ||
6518 | static void | |
6519 | c_parser_objc_protocol_definition (c_parser *parser) | |
6520 | { | |
6521 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL)); | |
6522 | c_parser_consume_token (parser); | |
6523 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6524 | { | |
6525 | c_parser_error (parser, "expected identifier"); | |
6526 | return; | |
6527 | } | |
6528 | if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA | |
6529 | || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON) | |
6530 | { | |
6531 | tree list = NULL_TREE; | |
6532 | /* Any identifiers, including those declared as type names, are | |
6533 | OK here. */ | |
6534 | while (true) | |
6535 | { | |
6536 | tree id; | |
6537 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6538 | { | |
6539 | c_parser_error (parser, "expected identifier"); | |
6540 | break; | |
6541 | } | |
6542 | id = c_parser_peek_token (parser)->value; | |
6543 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
6544 | c_parser_consume_token (parser); | |
6545 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
6546 | c_parser_consume_token (parser); | |
6547 | else | |
6548 | break; | |
6549 | } | |
6550 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6551 | objc_declare_protocols (list); | |
6552 | } | |
6553 | else | |
6554 | { | |
6555 | tree id = c_parser_peek_token (parser)->value; | |
6556 | tree proto = NULL_TREE; | |
6557 | c_parser_consume_token (parser); | |
6558 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
6559 | proto = c_parser_objc_protocol_refs (parser); | |
0bacb8c7 | 6560 | parser->objc_pq_context = true; |
27bf414c JM |
6561 | objc_start_protocol (id, proto); |
6562 | c_parser_objc_methodprotolist (parser); | |
6563 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
0bacb8c7 | 6564 | parser->objc_pq_context = false; |
27bf414c JM |
6565 | objc_finish_interface (); |
6566 | } | |
6567 | } | |
6568 | ||
6569 | /* Parse an objc-method-type. | |
6570 | ||
6571 | objc-method-type: | |
6572 | + | |
6573 | - | |
6574 | */ | |
6575 | ||
6576 | static enum tree_code | |
6577 | c_parser_objc_method_type (c_parser *parser) | |
6578 | { | |
6579 | switch (c_parser_peek_token (parser)->type) | |
6580 | { | |
6581 | case CPP_PLUS: | |
6582 | c_parser_consume_token (parser); | |
6583 | return PLUS_EXPR; | |
6584 | case CPP_MINUS: | |
6585 | c_parser_consume_token (parser); | |
6586 | return MINUS_EXPR; | |
6587 | default: | |
6588 | gcc_unreachable (); | |
6589 | } | |
6590 | } | |
6591 | ||
6592 | /* Parse an objc-method-definition. | |
6593 | ||
6594 | objc-method-definition: | |
6595 | objc-method-type objc-method-decl ;[opt] compound-statement | |
6596 | */ | |
6597 | ||
6598 | static void | |
6599 | c_parser_objc_method_definition (c_parser *parser) | |
6600 | { | |
6601 | enum tree_code type = c_parser_objc_method_type (parser); | |
6602 | tree decl; | |
6603 | objc_set_method_type (type); | |
0bacb8c7 | 6604 | parser->objc_pq_context = true; |
27bf414c JM |
6605 | decl = c_parser_objc_method_decl (parser); |
6606 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
6607 | { | |
6608 | c_parser_consume_token (parser); | |
b8698a0f | 6609 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
509c9d60 | 6610 | "extra semicolon in method definition specified"); |
27bf414c | 6611 | } |
8f078c08 AP |
6612 | if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
6613 | { | |
6614 | c_parser_error (parser, "expected %<{%>"); | |
6615 | return; | |
6616 | } | |
0bacb8c7 | 6617 | parser->objc_pq_context = false; |
27bf414c JM |
6618 | objc_start_method_definition (decl); |
6619 | add_stmt (c_parser_compound_statement (parser)); | |
6620 | objc_finish_method_definition (current_function_decl); | |
6621 | } | |
6622 | ||
6623 | /* Parse an objc-methodprotolist. | |
6624 | ||
6625 | objc-methodprotolist: | |
6626 | empty | |
6627 | objc-methodprotolist objc-methodproto | |
6628 | objc-methodprotolist declaration | |
6629 | objc-methodprotolist ; | |
6630 | ||
6631 | The declaration is a data definition, which may be missing | |
6632 | declaration specifiers under the same rules and diagnostics as | |
6633 | other data definitions outside functions, and the stray semicolon | |
6634 | is diagnosed the same way as a stray semicolon outside a | |
6635 | function. */ | |
6636 | ||
6637 | static void | |
6638 | c_parser_objc_methodprotolist (c_parser *parser) | |
6639 | { | |
6640 | while (true) | |
6641 | { | |
6642 | /* The list is terminated by @end. */ | |
6643 | switch (c_parser_peek_token (parser)->type) | |
6644 | { | |
6645 | case CPP_SEMICOLON: | |
b8698a0f | 6646 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
509c9d60 | 6647 | "ISO C does not allow extra %<;%> outside of a function"); |
27bf414c JM |
6648 | c_parser_consume_token (parser); |
6649 | break; | |
6650 | case CPP_PLUS: | |
6651 | case CPP_MINUS: | |
6652 | c_parser_objc_methodproto (parser); | |
6653 | break; | |
b9b58168 RH |
6654 | case CPP_PRAGMA: |
6655 | c_parser_pragma (parser, pragma_external); | |
6656 | break; | |
27bf414c JM |
6657 | case CPP_EOF: |
6658 | return; | |
6659 | default: | |
6660 | if (c_parser_next_token_is_keyword (parser, RID_AT_END)) | |
6661 | return; | |
32912286 JM |
6662 | c_parser_declaration_or_fndef (parser, false, false, true, |
6663 | false, true); | |
27bf414c JM |
6664 | break; |
6665 | } | |
6666 | } | |
6667 | } | |
6668 | ||
6669 | /* Parse an objc-methodproto. | |
6670 | ||
6671 | objc-methodproto: | |
6672 | objc-method-type objc-method-decl ; | |
6673 | */ | |
6674 | ||
6675 | static void | |
6676 | c_parser_objc_methodproto (c_parser *parser) | |
6677 | { | |
6678 | enum tree_code type = c_parser_objc_method_type (parser); | |
6679 | tree decl; | |
6680 | objc_set_method_type (type); | |
6681 | /* Remember protocol qualifiers in prototypes. */ | |
0bacb8c7 | 6682 | parser->objc_pq_context = true; |
27bf414c JM |
6683 | decl = c_parser_objc_method_decl (parser); |
6684 | /* Forget protocol qualifiers here. */ | |
0bacb8c7 | 6685 | parser->objc_pq_context = false; |
27bf414c JM |
6686 | objc_add_method_declaration (decl); |
6687 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6688 | } | |
6689 | ||
6690 | /* Parse an objc-method-decl. | |
6691 | ||
6692 | objc-method-decl: | |
6693 | ( objc-type-name ) objc-selector | |
6694 | objc-selector | |
6695 | ( objc-type-name ) objc-keyword-selector objc-optparmlist | |
6696 | objc-keyword-selector objc-optparmlist | |
6697 | ||
6698 | objc-keyword-selector: | |
6699 | objc-keyword-decl | |
6700 | objc-keyword-selector objc-keyword-decl | |
6701 | ||
6702 | objc-keyword-decl: | |
6703 | objc-selector : ( objc-type-name ) identifier | |
6704 | objc-selector : identifier | |
6705 | : ( objc-type-name ) identifier | |
6706 | : identifier | |
6707 | ||
6708 | objc-optparmlist: | |
6709 | objc-optparms objc-optellipsis | |
6710 | ||
6711 | objc-optparms: | |
6712 | empty | |
6713 | objc-opt-parms , parameter-declaration | |
6714 | ||
6715 | objc-optellipsis: | |
6716 | empty | |
6717 | , ... | |
6718 | */ | |
6719 | ||
6720 | static tree | |
6721 | c_parser_objc_method_decl (c_parser *parser) | |
6722 | { | |
6723 | tree type = NULL_TREE; | |
6724 | tree sel; | |
6725 | tree parms = NULL_TREE; | |
dbb74365 RS |
6726 | bool ellipsis = false; |
6727 | ||
27bf414c JM |
6728 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
6729 | { | |
6730 | c_parser_consume_token (parser); | |
6731 | type = c_parser_objc_type_name (parser); | |
6732 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6733 | } | |
6734 | sel = c_parser_objc_selector (parser); | |
6735 | /* If there is no selector, or a colon follows, we have an | |
6736 | objc-keyword-selector. If there is a selector, and a colon does | |
6737 | not follow, that selector ends the objc-method-decl. */ | |
6738 | if (!sel || c_parser_next_token_is (parser, CPP_COLON)) | |
6739 | { | |
6740 | tree tsel = sel; | |
6741 | tree list = NULL_TREE; | |
27bf414c JM |
6742 | while (true) |
6743 | { | |
6744 | tree atype = NULL_TREE, id, keyworddecl; | |
6745 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
6746 | break; | |
6747 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
6748 | { | |
6749 | c_parser_consume_token (parser); | |
6750 | atype = c_parser_objc_type_name (parser); | |
6751 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6752 | "expected %<)%>"); | |
6753 | } | |
6754 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6755 | { | |
6756 | c_parser_error (parser, "expected identifier"); | |
6757 | return error_mark_node; | |
6758 | } | |
6759 | id = c_parser_peek_token (parser)->value; | |
6760 | c_parser_consume_token (parser); | |
6761 | keyworddecl = objc_build_keyword_decl (tsel, atype, id); | |
6762 | list = chainon (list, keyworddecl); | |
6763 | tsel = c_parser_objc_selector (parser); | |
6764 | if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6765 | break; | |
6766 | } | |
6767 | /* Parse the optional parameter list. Optional Objective-C | |
6768 | method parameters follow the C syntax, and may include '...' | |
6769 | to denote a variable number of arguments. */ | |
6770 | parms = make_node (TREE_LIST); | |
27bf414c JM |
6771 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
6772 | { | |
6773 | struct c_parm *parm; | |
6774 | c_parser_consume_token (parser); | |
6775 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
6776 | { | |
6777 | ellipsis = true; | |
6778 | c_parser_consume_token (parser); | |
6779 | break; | |
6780 | } | |
6781 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
6782 | if (parm == NULL) | |
6783 | break; | |
6784 | parms = chainon (parms, | |
6785 | build_tree_list (NULL_TREE, grokparm (parm))); | |
6786 | } | |
27bf414c JM |
6787 | sel = list; |
6788 | } | |
dbb74365 | 6789 | return objc_build_method_signature (type, sel, parms, ellipsis); |
27bf414c JM |
6790 | } |
6791 | ||
6792 | /* Parse an objc-type-name. | |
6793 | ||
6794 | objc-type-name: | |
6795 | objc-type-qualifiers[opt] type-name | |
6796 | objc-type-qualifiers[opt] | |
6797 | ||
6798 | objc-type-qualifiers: | |
6799 | objc-type-qualifier | |
6800 | objc-type-qualifiers objc-type-qualifier | |
6801 | ||
6802 | objc-type-qualifier: one of | |
6803 | in out inout bycopy byref oneway | |
6804 | */ | |
6805 | ||
6806 | static tree | |
6807 | c_parser_objc_type_name (c_parser *parser) | |
6808 | { | |
6809 | tree quals = NULL_TREE; | |
d75d71e0 | 6810 | struct c_type_name *type_name = NULL; |
27bf414c JM |
6811 | tree type = NULL_TREE; |
6812 | while (true) | |
6813 | { | |
6814 | c_token *token = c_parser_peek_token (parser); | |
6815 | if (token->type == CPP_KEYWORD | |
6816 | && (token->keyword == RID_IN | |
6817 | || token->keyword == RID_OUT | |
6818 | || token->keyword == RID_INOUT | |
6819 | || token->keyword == RID_BYCOPY | |
6820 | || token->keyword == RID_BYREF | |
6821 | || token->keyword == RID_ONEWAY)) | |
6822 | { | |
6823 | quals = chainon (quals, build_tree_list (NULL_TREE, token->value)); | |
6824 | c_parser_consume_token (parser); | |
6825 | } | |
6826 | else | |
6827 | break; | |
6828 | } | |
6829 | if (c_parser_next_token_starts_typename (parser)) | |
d75d71e0 ILT |
6830 | type_name = c_parser_type_name (parser); |
6831 | if (type_name) | |
928c19bb | 6832 | type = groktypename (type_name, NULL, NULL); |
27bf414c JM |
6833 | return build_tree_list (quals, type); |
6834 | } | |
6835 | ||
6836 | /* Parse objc-protocol-refs. | |
6837 | ||
6838 | objc-protocol-refs: | |
6839 | < identifier-list > | |
6840 | */ | |
6841 | ||
6842 | static tree | |
6843 | c_parser_objc_protocol_refs (c_parser *parser) | |
6844 | { | |
6845 | tree list = NULL_TREE; | |
6846 | gcc_assert (c_parser_next_token_is (parser, CPP_LESS)); | |
6847 | c_parser_consume_token (parser); | |
6848 | /* Any identifiers, including those declared as type names, are OK | |
6849 | here. */ | |
6850 | while (true) | |
6851 | { | |
6852 | tree id; | |
6853 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6854 | { | |
6855 | c_parser_error (parser, "expected identifier"); | |
6856 | break; | |
6857 | } | |
6858 | id = c_parser_peek_token (parser)->value; | |
6859 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
6860 | c_parser_consume_token (parser); | |
6861 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
6862 | c_parser_consume_token (parser); | |
6863 | else | |
6864 | break; | |
6865 | } | |
6866 | c_parser_require (parser, CPP_GREATER, "expected %<>%>"); | |
6867 | return list; | |
6868 | } | |
6869 | ||
6870 | /* Parse an objc-try-catch-statement. | |
6871 | ||
6872 | objc-try-catch-statement: | |
6873 | @try compound-statement objc-catch-list[opt] | |
6874 | @try compound-statement objc-catch-list[opt] @finally compound-statement | |
6875 | ||
6876 | objc-catch-list: | |
6877 | @catch ( parameter-declaration ) compound-statement | |
6878 | objc-catch-list @catch ( parameter-declaration ) compound-statement | |
6879 | */ | |
6880 | ||
6881 | static void | |
6882 | c_parser_objc_try_catch_statement (c_parser *parser) | |
6883 | { | |
6884 | location_t loc; | |
6885 | tree stmt; | |
eea1139b | 6886 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRY)); |
27bf414c JM |
6887 | c_parser_consume_token (parser); |
6888 | loc = c_parser_peek_token (parser)->location; | |
6889 | stmt = c_parser_compound_statement (parser); | |
6890 | objc_begin_try_stmt (loc, stmt); | |
eea1139b | 6891 | while (c_parser_next_token_is_keyword (parser, RID_CATCH)) |
27bf414c JM |
6892 | { |
6893 | struct c_parm *parm; | |
6894 | c_parser_consume_token (parser); | |
6895 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6896 | break; | |
6897 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
6898 | if (parm == NULL) | |
6899 | { | |
6900 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6901 | break; | |
6902 | } | |
6903 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6904 | objc_begin_catch_clause (grokparm (parm)); | |
6905 | if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) | |
6906 | c_parser_compound_statement_nostart (parser); | |
6907 | objc_finish_catch_clause (); | |
6908 | } | |
6909 | if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY)) | |
6910 | { | |
6911 | location_t finloc; | |
6912 | tree finstmt; | |
6913 | c_parser_consume_token (parser); | |
6914 | finloc = c_parser_peek_token (parser)->location; | |
6915 | finstmt = c_parser_compound_statement (parser); | |
6916 | objc_build_finally_clause (finloc, finstmt); | |
6917 | } | |
6918 | objc_finish_try_stmt (); | |
6919 | } | |
6920 | ||
6921 | /* Parse an objc-synchronized-statement. | |
6922 | ||
6923 | objc-synchronized-statement: | |
6924 | @synchronized ( expression ) compound-statement | |
6925 | */ | |
6926 | ||
6927 | static void | |
6928 | c_parser_objc_synchronized_statement (c_parser *parser) | |
6929 | { | |
6930 | location_t loc; | |
6931 | tree expr, stmt; | |
6932 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED)); | |
6933 | c_parser_consume_token (parser); | |
6934 | loc = c_parser_peek_token (parser)->location; | |
6935 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6936 | { | |
6937 | expr = c_parser_expression (parser).value; | |
928c19bb | 6938 | expr = c_fully_fold (expr, false, NULL); |
27bf414c JM |
6939 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
6940 | } | |
6941 | else | |
6942 | expr = error_mark_node; | |
6943 | stmt = c_parser_compound_statement (parser); | |
6944 | objc_build_synchronized (loc, expr, stmt); | |
6945 | } | |
6946 | ||
6947 | /* Parse an objc-selector; return NULL_TREE without an error if the | |
6948 | next token is not an objc-selector. | |
6949 | ||
6950 | objc-selector: | |
6951 | identifier | |
6952 | one of | |
6953 | enum struct union if else while do for switch case default | |
6954 | break continue return goto asm sizeof typeof __alignof | |
6955 | unsigned long const short volatile signed restrict _Complex | |
6956 | in out inout bycopy byref oneway int char float double void _Bool | |
6957 | ||
6958 | ??? Why this selection of keywords but not, for example, storage | |
6959 | class specifiers? */ | |
6960 | ||
6961 | static tree | |
6962 | c_parser_objc_selector (c_parser *parser) | |
6963 | { | |
6964 | c_token *token = c_parser_peek_token (parser); | |
6965 | tree value = token->value; | |
6966 | if (token->type == CPP_NAME) | |
6967 | { | |
6968 | c_parser_consume_token (parser); | |
6969 | return value; | |
6970 | } | |
6971 | if (token->type != CPP_KEYWORD) | |
6972 | return NULL_TREE; | |
6973 | switch (token->keyword) | |
6974 | { | |
6975 | case RID_ENUM: | |
6976 | case RID_STRUCT: | |
6977 | case RID_UNION: | |
6978 | case RID_IF: | |
6979 | case RID_ELSE: | |
6980 | case RID_WHILE: | |
6981 | case RID_DO: | |
6982 | case RID_FOR: | |
6983 | case RID_SWITCH: | |
6984 | case RID_CASE: | |
6985 | case RID_DEFAULT: | |
6986 | case RID_BREAK: | |
6987 | case RID_CONTINUE: | |
6988 | case RID_RETURN: | |
6989 | case RID_GOTO: | |
6990 | case RID_ASM: | |
6991 | case RID_SIZEOF: | |
6992 | case RID_TYPEOF: | |
6993 | case RID_ALIGNOF: | |
6994 | case RID_UNSIGNED: | |
6995 | case RID_LONG: | |
a6766312 | 6996 | case RID_INT128: |
27bf414c JM |
6997 | case RID_CONST: |
6998 | case RID_SHORT: | |
6999 | case RID_VOLATILE: | |
7000 | case RID_SIGNED: | |
7001 | case RID_RESTRICT: | |
7002 | case RID_COMPLEX: | |
7003 | case RID_IN: | |
7004 | case RID_OUT: | |
7005 | case RID_INOUT: | |
7006 | case RID_BYCOPY: | |
7007 | case RID_BYREF: | |
7008 | case RID_ONEWAY: | |
7009 | case RID_INT: | |
7010 | case RID_CHAR: | |
7011 | case RID_FLOAT: | |
7012 | case RID_DOUBLE: | |
7013 | case RID_VOID: | |
7014 | case RID_BOOL: | |
7015 | c_parser_consume_token (parser); | |
7016 | return value; | |
7017 | default: | |
7018 | return NULL_TREE; | |
7019 | } | |
7020 | } | |
7021 | ||
7022 | /* Parse an objc-selector-arg. | |
7023 | ||
7024 | objc-selector-arg: | |
7025 | objc-selector | |
7026 | objc-keywordname-list | |
7027 | ||
7028 | objc-keywordname-list: | |
7029 | objc-keywordname | |
7030 | objc-keywordname-list objc-keywordname | |
7031 | ||
7032 | objc-keywordname: | |
7033 | objc-selector : | |
7034 | : | |
7035 | */ | |
7036 | ||
7037 | static tree | |
7038 | c_parser_objc_selector_arg (c_parser *parser) | |
7039 | { | |
7040 | tree sel = c_parser_objc_selector (parser); | |
7041 | tree list = NULL_TREE; | |
7042 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
7043 | return sel; | |
7044 | while (true) | |
7045 | { | |
7046 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
7047 | return list; | |
7048 | list = chainon (list, build_tree_list (sel, NULL_TREE)); | |
7049 | sel = c_parser_objc_selector (parser); | |
7050 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
7051 | break; | |
7052 | } | |
7053 | return list; | |
7054 | } | |
7055 | ||
7056 | /* Parse an objc-receiver. | |
7057 | ||
7058 | objc-receiver: | |
7059 | expression | |
7060 | class-name | |
7061 | type-name | |
7062 | */ | |
7063 | ||
7064 | static tree | |
7065 | c_parser_objc_receiver (c_parser *parser) | |
7066 | { | |
7067 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
7068 | && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME | |
7069 | || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
7070 | { | |
7071 | tree id = c_parser_peek_token (parser)->value; | |
7072 | c_parser_consume_token (parser); | |
7073 | return objc_get_class_reference (id); | |
7074 | } | |
928c19bb | 7075 | return c_fully_fold (c_parser_expression (parser).value, false, NULL); |
27bf414c JM |
7076 | } |
7077 | ||
7078 | /* Parse objc-message-args. | |
7079 | ||
7080 | objc-message-args: | |
7081 | objc-selector | |
7082 | objc-keywordarg-list | |
7083 | ||
7084 | objc-keywordarg-list: | |
7085 | objc-keywordarg | |
7086 | objc-keywordarg-list objc-keywordarg | |
7087 | ||
7088 | objc-keywordarg: | |
7089 | objc-selector : objc-keywordexpr | |
7090 | : objc-keywordexpr | |
7091 | */ | |
7092 | ||
7093 | static tree | |
7094 | c_parser_objc_message_args (c_parser *parser) | |
7095 | { | |
7096 | tree sel = c_parser_objc_selector (parser); | |
7097 | tree list = NULL_TREE; | |
7098 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
7099 | return sel; | |
7100 | while (true) | |
7101 | { | |
7102 | tree keywordexpr; | |
7103 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
0a7d7dea | 7104 | return error_mark_node; |
27bf414c JM |
7105 | keywordexpr = c_parser_objc_keywordexpr (parser); |
7106 | list = chainon (list, build_tree_list (sel, keywordexpr)); | |
7107 | sel = c_parser_objc_selector (parser); | |
7108 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
7109 | break; | |
7110 | } | |
7111 | return list; | |
7112 | } | |
7113 | ||
7114 | /* Parse an objc-keywordexpr. | |
7115 | ||
7116 | objc-keywordexpr: | |
7117 | nonempty-expr-list | |
7118 | */ | |
7119 | ||
7120 | static tree | |
7121 | c_parser_objc_keywordexpr (c_parser *parser) | |
7122 | { | |
bbbbb16a ILT |
7123 | tree ret; |
7124 | VEC(tree,gc) *expr_list = c_parser_expr_list (parser, true, true, NULL); | |
7125 | if (VEC_length (tree, expr_list) == 1) | |
27bf414c JM |
7126 | { |
7127 | /* Just return the expression, remove a level of | |
7128 | indirection. */ | |
bbbbb16a | 7129 | ret = VEC_index (tree, expr_list, 0); |
27bf414c JM |
7130 | } |
7131 | else | |
7132 | { | |
7133 | /* We have a comma expression, we will collapse later. */ | |
c166b898 | 7134 | ret = build_tree_list_vec (expr_list); |
27bf414c | 7135 | } |
c166b898 | 7136 | release_tree_vector (expr_list); |
bbbbb16a | 7137 | return ret; |
27bf414c JM |
7138 | } |
7139 | ||
7140 | \f | |
953ff289 DN |
7141 | /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore |
7142 | should be considered, statements. ALLOW_STMT is true if we're within | |
7143 | the context of a function and such pragmas are to be allowed. Returns | |
7144 | true if we actually parsed such a pragma. */ | |
27bf414c | 7145 | |
bc4071dd | 7146 | static bool |
953ff289 | 7147 | c_parser_pragma (c_parser *parser, enum pragma_context context) |
bc4071dd RH |
7148 | { |
7149 | unsigned int id; | |
7150 | ||
7151 | id = c_parser_peek_token (parser)->pragma_kind; | |
7152 | gcc_assert (id != PRAGMA_NONE); | |
7153 | ||
7154 | switch (id) | |
7155 | { | |
953ff289 DN |
7156 | case PRAGMA_OMP_BARRIER: |
7157 | if (context != pragma_compound) | |
7158 | { | |
7159 | if (context == pragma_stmt) | |
7160 | c_parser_error (parser, "%<#pragma omp barrier%> may only be " | |
7161 | "used in compound statements"); | |
7162 | goto bad_stmt; | |
7163 | } | |
7164 | c_parser_omp_barrier (parser); | |
7165 | return false; | |
7166 | ||
7167 | case PRAGMA_OMP_FLUSH: | |
7168 | if (context != pragma_compound) | |
7169 | { | |
7170 | if (context == pragma_stmt) | |
7171 | c_parser_error (parser, "%<#pragma omp flush%> may only be " | |
7172 | "used in compound statements"); | |
7173 | goto bad_stmt; | |
7174 | } | |
7175 | c_parser_omp_flush (parser); | |
7176 | return false; | |
7177 | ||
a68ab351 JJ |
7178 | case PRAGMA_OMP_TASKWAIT: |
7179 | if (context != pragma_compound) | |
7180 | { | |
7181 | if (context == pragma_stmt) | |
7182 | c_parser_error (parser, "%<#pragma omp taskwait%> may only be " | |
7183 | "used in compound statements"); | |
7184 | goto bad_stmt; | |
7185 | } | |
7186 | c_parser_omp_taskwait (parser); | |
7187 | return false; | |
7188 | ||
953ff289 DN |
7189 | case PRAGMA_OMP_THREADPRIVATE: |
7190 | c_parser_omp_threadprivate (parser); | |
7191 | return false; | |
7192 | ||
7193 | case PRAGMA_OMP_SECTION: | |
3ba09659 AH |
7194 | error_at (c_parser_peek_token (parser)->location, |
7195 | "%<#pragma omp section%> may only be used in " | |
7196 | "%<#pragma omp sections%> construct"); | |
953ff289 DN |
7197 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); |
7198 | return false; | |
7199 | ||
bc4071dd RH |
7200 | case PRAGMA_GCC_PCH_PREPROCESS: |
7201 | c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first"); | |
7202 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
7203 | return false; | |
7204 | ||
7205 | default: | |
953ff289 DN |
7206 | if (id < PRAGMA_FIRST_EXTERNAL) |
7207 | { | |
7208 | if (context == pragma_external) | |
7209 | { | |
7210 | bad_stmt: | |
7211 | c_parser_error (parser, "expected declaration specifiers"); | |
7212 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
7213 | return false; | |
7214 | } | |
7215 | c_parser_omp_construct (parser); | |
7216 | return true; | |
7217 | } | |
bc4071dd RH |
7218 | break; |
7219 | } | |
7220 | ||
7221 | c_parser_consume_pragma (parser); | |
7222 | c_invoke_pragma_handler (id); | |
27bf414c | 7223 | |
b8698a0f | 7224 | /* Skip to EOL, but suppress any error message. Those will have been |
bc4071dd RH |
7225 | generated by the handler routine through calling error, as opposed |
7226 | to calling c_parser_error. */ | |
7227 | parser->error = true; | |
7228 | c_parser_skip_to_pragma_eol (parser); | |
7229 | ||
7230 | return false; | |
7231 | } | |
7232 | ||
7233 | /* The interface the pragma parsers have to the lexer. */ | |
7234 | ||
7235 | enum cpp_ttype | |
7236 | pragma_lex (tree *value) | |
7237 | { | |
7238 | c_token *tok = c_parser_peek_token (the_parser); | |
7239 | enum cpp_ttype ret = tok->type; | |
7240 | ||
7241 | *value = tok->value; | |
7242 | if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF) | |
7243 | ret = CPP_EOF; | |
7244 | else | |
7245 | { | |
7246 | if (ret == CPP_KEYWORD) | |
7247 | ret = CPP_NAME; | |
7248 | c_parser_consume_token (the_parser); | |
7249 | } | |
7250 | ||
7251 | return ret; | |
7252 | } | |
7253 | ||
7254 | static void | |
7255 | c_parser_pragma_pch_preprocess (c_parser *parser) | |
7256 | { | |
7257 | tree name = NULL; | |
7258 | ||
7259 | c_parser_consume_pragma (parser); | |
7260 | if (c_parser_next_token_is (parser, CPP_STRING)) | |
7261 | { | |
7262 | name = c_parser_peek_token (parser)->value; | |
7263 | c_parser_consume_token (parser); | |
7264 | } | |
7265 | else | |
7266 | c_parser_error (parser, "expected string literal"); | |
7267 | c_parser_skip_to_pragma_eol (parser); | |
7268 | ||
7269 | if (name) | |
7270 | c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name)); | |
7271 | } | |
953ff289 DN |
7272 | \f |
7273 | /* OpenMP 2.5 parsing routines. */ | |
7274 | ||
7275 | /* Returns name of the next clause. | |
7276 | If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and | |
7277 | the token is not consumed. Otherwise appropriate pragma_omp_clause is | |
7278 | returned and the token is consumed. */ | |
7279 | ||
7280 | static pragma_omp_clause | |
7281 | c_parser_omp_clause_name (c_parser *parser) | |
7282 | { | |
7283 | pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE; | |
7284 | ||
7285 | if (c_parser_next_token_is_keyword (parser, RID_IF)) | |
7286 | result = PRAGMA_OMP_CLAUSE_IF; | |
7287 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
7288 | result = PRAGMA_OMP_CLAUSE_DEFAULT; | |
7289 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
7290 | { | |
7291 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
7292 | ||
7293 | switch (p[0]) | |
7294 | { | |
7295 | case 'c': | |
a68ab351 JJ |
7296 | if (!strcmp ("collapse", p)) |
7297 | result = PRAGMA_OMP_CLAUSE_COLLAPSE; | |
7298 | else if (!strcmp ("copyin", p)) | |
953ff289 DN |
7299 | result = PRAGMA_OMP_CLAUSE_COPYIN; |
7300 | else if (!strcmp ("copyprivate", p)) | |
7301 | result = PRAGMA_OMP_CLAUSE_COPYPRIVATE; | |
7302 | break; | |
7303 | case 'f': | |
7304 | if (!strcmp ("firstprivate", p)) | |
7305 | result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE; | |
7306 | break; | |
7307 | case 'l': | |
7308 | if (!strcmp ("lastprivate", p)) | |
7309 | result = PRAGMA_OMP_CLAUSE_LASTPRIVATE; | |
7310 | break; | |
7311 | case 'n': | |
7312 | if (!strcmp ("nowait", p)) | |
7313 | result = PRAGMA_OMP_CLAUSE_NOWAIT; | |
7314 | else if (!strcmp ("num_threads", p)) | |
7315 | result = PRAGMA_OMP_CLAUSE_NUM_THREADS; | |
7316 | break; | |
7317 | case 'o': | |
7318 | if (!strcmp ("ordered", p)) | |
7319 | result = PRAGMA_OMP_CLAUSE_ORDERED; | |
7320 | break; | |
7321 | case 'p': | |
7322 | if (!strcmp ("private", p)) | |
7323 | result = PRAGMA_OMP_CLAUSE_PRIVATE; | |
7324 | break; | |
7325 | case 'r': | |
7326 | if (!strcmp ("reduction", p)) | |
7327 | result = PRAGMA_OMP_CLAUSE_REDUCTION; | |
7328 | break; | |
7329 | case 's': | |
7330 | if (!strcmp ("schedule", p)) | |
7331 | result = PRAGMA_OMP_CLAUSE_SCHEDULE; | |
7332 | else if (!strcmp ("shared", p)) | |
7333 | result = PRAGMA_OMP_CLAUSE_SHARED; | |
7334 | break; | |
a68ab351 JJ |
7335 | case 'u': |
7336 | if (!strcmp ("untied", p)) | |
7337 | result = PRAGMA_OMP_CLAUSE_UNTIED; | |
7338 | break; | |
953ff289 DN |
7339 | } |
7340 | } | |
7341 | ||
7342 | if (result != PRAGMA_OMP_CLAUSE_NONE) | |
7343 | c_parser_consume_token (parser); | |
7344 | ||
7345 | return result; | |
7346 | } | |
7347 | ||
7348 | /* Validate that a clause of the given type does not already exist. */ | |
7349 | ||
7350 | static void | |
d75d71e0 ILT |
7351 | check_no_duplicate_clause (tree clauses, enum omp_clause_code code, |
7352 | const char *name) | |
953ff289 DN |
7353 | { |
7354 | tree c; | |
7355 | ||
7356 | for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c)) | |
aaf46ef9 | 7357 | if (OMP_CLAUSE_CODE (c) == code) |
953ff289 | 7358 | { |
c2255bc4 AH |
7359 | location_t loc = OMP_CLAUSE_LOCATION (c); |
7360 | error_at (loc, "too many %qs clauses", name); | |
953ff289 DN |
7361 | break; |
7362 | } | |
7363 | } | |
7364 | ||
7365 | /* OpenMP 2.5: | |
7366 | variable-list: | |
7367 | identifier | |
7368 | variable-list , identifier | |
7369 | ||
c2255bc4 AH |
7370 | If KIND is nonzero, create the appropriate node and install the |
7371 | decl in OMP_CLAUSE_DECL and add the node to the head of the list. | |
7372 | If KIND is nonzero, CLAUSE_LOC is the location of the clause. | |
953ff289 DN |
7373 | |
7374 | If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE; | |
7375 | return the list created. */ | |
7376 | ||
7377 | static tree | |
c2255bc4 AH |
7378 | c_parser_omp_variable_list (c_parser *parser, |
7379 | location_t clause_loc, | |
7380 | enum omp_clause_code kind, | |
aaf46ef9 | 7381 | tree list) |
953ff289 DN |
7382 | { |
7383 | if (c_parser_next_token_is_not (parser, CPP_NAME) | |
7384 | || c_parser_peek_token (parser)->id_kind != C_ID_ID) | |
7385 | c_parser_error (parser, "expected identifier"); | |
7386 | ||
7387 | while (c_parser_next_token_is (parser, CPP_NAME) | |
7388 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
7389 | { | |
7390 | tree t = lookup_name (c_parser_peek_token (parser)->value); | |
7391 | ||
7392 | if (t == NULL_TREE) | |
c2255bc4 AH |
7393 | undeclared_variable (c_parser_peek_token (parser)->location, |
7394 | c_parser_peek_token (parser)->value); | |
953ff289 DN |
7395 | else if (t == error_mark_node) |
7396 | ; | |
7397 | else if (kind != 0) | |
7398 | { | |
c2255bc4 | 7399 | tree u = build_omp_clause (clause_loc, kind); |
953ff289 DN |
7400 | OMP_CLAUSE_DECL (u) = t; |
7401 | OMP_CLAUSE_CHAIN (u) = list; | |
7402 | list = u; | |
7403 | } | |
7404 | else | |
7405 | list = tree_cons (t, NULL_TREE, list); | |
7406 | ||
7407 | c_parser_consume_token (parser); | |
7408 | ||
7409 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
7410 | break; | |
7411 | ||
7412 | c_parser_consume_token (parser); | |
7413 | } | |
7414 | ||
7415 | return list; | |
7416 | } | |
7417 | ||
7418 | /* Similarly, but expect leading and trailing parenthesis. This is a very | |
7419 | common case for omp clauses. */ | |
7420 | ||
7421 | static tree | |
d75d71e0 ILT |
7422 | c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind, |
7423 | tree list) | |
953ff289 | 7424 | { |
c2255bc4 AH |
7425 | /* The clauses location. */ |
7426 | location_t loc = c_parser_peek_token (parser)->location; | |
7427 | ||
953ff289 DN |
7428 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7429 | { | |
c2255bc4 | 7430 | list = c_parser_omp_variable_list (parser, loc, kind, list); |
953ff289 DN |
7431 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
7432 | } | |
7433 | return list; | |
7434 | } | |
7435 | ||
a68ab351 JJ |
7436 | /* OpenMP 3.0: |
7437 | collapse ( constant-expression ) */ | |
7438 | ||
7439 | static tree | |
7440 | c_parser_omp_clause_collapse (c_parser *parser, tree list) | |
7441 | { | |
7442 | tree c, num = error_mark_node; | |
7443 | HOST_WIDE_INT n; | |
7444 | location_t loc; | |
7445 | ||
7446 | check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse"); | |
7447 | ||
7448 | loc = c_parser_peek_token (parser)->location; | |
7449 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7450 | { | |
7451 | num = c_parser_expr_no_commas (parser, NULL).value; | |
7452 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7453 | } | |
7454 | if (num == error_mark_node) | |
7455 | return list; | |
7456 | if (!INTEGRAL_TYPE_P (TREE_TYPE (num)) | |
7457 | || !host_integerp (num, 0) | |
7458 | || (n = tree_low_cst (num, 0)) <= 0 | |
7459 | || (int) n != n) | |
7460 | { | |
3ba09659 AH |
7461 | error_at (loc, |
7462 | "collapse argument needs positive constant integer expression"); | |
a68ab351 JJ |
7463 | return list; |
7464 | } | |
c2255bc4 | 7465 | c = build_omp_clause (loc, OMP_CLAUSE_COLLAPSE); |
a68ab351 JJ |
7466 | OMP_CLAUSE_COLLAPSE_EXPR (c) = num; |
7467 | OMP_CLAUSE_CHAIN (c) = list; | |
7468 | return c; | |
7469 | } | |
7470 | ||
953ff289 DN |
7471 | /* OpenMP 2.5: |
7472 | copyin ( variable-list ) */ | |
7473 | ||
7474 | static tree | |
7475 | c_parser_omp_clause_copyin (c_parser *parser, tree list) | |
7476 | { | |
7477 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list); | |
7478 | } | |
7479 | ||
7480 | /* OpenMP 2.5: | |
7481 | copyprivate ( variable-list ) */ | |
7482 | ||
7483 | static tree | |
7484 | c_parser_omp_clause_copyprivate (c_parser *parser, tree list) | |
7485 | { | |
7486 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list); | |
7487 | } | |
7488 | ||
7489 | /* OpenMP 2.5: | |
7490 | default ( shared | none ) */ | |
7491 | ||
7492 | static tree | |
7493 | c_parser_omp_clause_default (c_parser *parser, tree list) | |
7494 | { | |
7495 | enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED; | |
c2255bc4 | 7496 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7497 | tree c; |
7498 | ||
7499 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7500 | return list; | |
7501 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
7502 | { | |
7503 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
7504 | ||
7505 | switch (p[0]) | |
7506 | { | |
7507 | case 'n': | |
7508 | if (strcmp ("none", p) != 0) | |
7509 | goto invalid_kind; | |
7510 | kind = OMP_CLAUSE_DEFAULT_NONE; | |
7511 | break; | |
7512 | ||
7513 | case 's': | |
7514 | if (strcmp ("shared", p) != 0) | |
7515 | goto invalid_kind; | |
7516 | kind = OMP_CLAUSE_DEFAULT_SHARED; | |
7517 | break; | |
7518 | ||
7519 | default: | |
7520 | goto invalid_kind; | |
7521 | } | |
7522 | ||
7523 | c_parser_consume_token (parser); | |
7524 | } | |
7525 | else | |
7526 | { | |
7527 | invalid_kind: | |
7528 | c_parser_error (parser, "expected %<none%> or %<shared%>"); | |
7529 | } | |
7530 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7531 | ||
7532 | if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED) | |
7533 | return list; | |
7534 | ||
7535 | check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default"); | |
c2255bc4 | 7536 | c = build_omp_clause (loc, OMP_CLAUSE_DEFAULT); |
953ff289 DN |
7537 | OMP_CLAUSE_CHAIN (c) = list; |
7538 | OMP_CLAUSE_DEFAULT_KIND (c) = kind; | |
7539 | ||
7540 | return c; | |
7541 | } | |
7542 | ||
7543 | /* OpenMP 2.5: | |
7544 | firstprivate ( variable-list ) */ | |
7545 | ||
7546 | static tree | |
7547 | c_parser_omp_clause_firstprivate (c_parser *parser, tree list) | |
7548 | { | |
7549 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list); | |
7550 | } | |
7551 | ||
7552 | /* OpenMP 2.5: | |
7553 | if ( expression ) */ | |
7554 | ||
7555 | static tree | |
7556 | c_parser_omp_clause_if (c_parser *parser, tree list) | |
7557 | { | |
c2255bc4 | 7558 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7559 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
7560 | { | |
7561 | tree t = c_parser_paren_condition (parser); | |
7562 | tree c; | |
7563 | ||
7564 | check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if"); | |
7565 | ||
c2255bc4 | 7566 | c = build_omp_clause (loc, OMP_CLAUSE_IF); |
953ff289 DN |
7567 | OMP_CLAUSE_IF_EXPR (c) = t; |
7568 | OMP_CLAUSE_CHAIN (c) = list; | |
7569 | list = c; | |
7570 | } | |
7571 | else | |
7572 | c_parser_error (parser, "expected %<(%>"); | |
7573 | ||
7574 | return list; | |
7575 | } | |
7576 | ||
7577 | /* OpenMP 2.5: | |
7578 | lastprivate ( variable-list ) */ | |
7579 | ||
7580 | static tree | |
7581 | c_parser_omp_clause_lastprivate (c_parser *parser, tree list) | |
7582 | { | |
7583 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list); | |
7584 | } | |
7585 | ||
7586 | /* OpenMP 2.5: | |
7587 | nowait */ | |
7588 | ||
7589 | static tree | |
7590 | c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
7591 | { | |
7592 | tree c; | |
c2255bc4 | 7593 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7594 | |
7595 | check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait"); | |
7596 | ||
c2255bc4 | 7597 | c = build_omp_clause (loc, OMP_CLAUSE_NOWAIT); |
953ff289 DN |
7598 | OMP_CLAUSE_CHAIN (c) = list; |
7599 | return c; | |
7600 | } | |
7601 | ||
7602 | /* OpenMP 2.5: | |
7603 | num_threads ( expression ) */ | |
7604 | ||
7605 | static tree | |
7606 | c_parser_omp_clause_num_threads (c_parser *parser, tree list) | |
7607 | { | |
c2255bc4 | 7608 | location_t num_threads_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7609 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7610 | { | |
c7412148 | 7611 | location_t expr_loc = c_parser_peek_token (parser)->location; |
953ff289 | 7612 | tree c, t = c_parser_expression (parser).value; |
928c19bb | 7613 | t = c_fully_fold (t, false, NULL); |
953ff289 DN |
7614 | |
7615 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7616 | ||
7617 | if (!INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
7618 | { | |
7619 | c_parser_error (parser, "expected integer expression"); | |
7620 | return list; | |
7621 | } | |
7622 | ||
7623 | /* Attempt to statically determine when the number isn't positive. */ | |
db3927fb | 7624 | c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t, |
953ff289 | 7625 | build_int_cst (TREE_TYPE (t), 0)); |
c2255bc4 AH |
7626 | if (CAN_HAVE_LOCATION_P (c)) |
7627 | SET_EXPR_LOCATION (c, expr_loc); | |
953ff289 DN |
7628 | if (c == boolean_true_node) |
7629 | { | |
3ba09659 AH |
7630 | warning_at (expr_loc, 0, |
7631 | "%<num_threads%> value must be positive"); | |
953ff289 DN |
7632 | t = integer_one_node; |
7633 | } | |
7634 | ||
7635 | check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads"); | |
7636 | ||
c2255bc4 | 7637 | c = build_omp_clause (num_threads_loc, OMP_CLAUSE_NUM_THREADS); |
953ff289 DN |
7638 | OMP_CLAUSE_NUM_THREADS_EXPR (c) = t; |
7639 | OMP_CLAUSE_CHAIN (c) = list; | |
7640 | list = c; | |
7641 | } | |
7642 | ||
7643 | return list; | |
7644 | } | |
7645 | ||
7646 | /* OpenMP 2.5: | |
7647 | ordered */ | |
7648 | ||
7649 | static tree | |
c2255bc4 | 7650 | c_parser_omp_clause_ordered (c_parser *parser, tree list) |
953ff289 DN |
7651 | { |
7652 | tree c; | |
7653 | ||
7654 | check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered"); | |
7655 | ||
c2255bc4 AH |
7656 | c = build_omp_clause (c_parser_peek_token (parser)->location, |
7657 | OMP_CLAUSE_ORDERED); | |
953ff289 | 7658 | OMP_CLAUSE_CHAIN (c) = list; |
c2255bc4 | 7659 | |
953ff289 DN |
7660 | return c; |
7661 | } | |
7662 | ||
7663 | /* OpenMP 2.5: | |
7664 | private ( variable-list ) */ | |
7665 | ||
7666 | static tree | |
7667 | c_parser_omp_clause_private (c_parser *parser, tree list) | |
7668 | { | |
7669 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list); | |
7670 | } | |
7671 | ||
7672 | /* OpenMP 2.5: | |
7673 | reduction ( reduction-operator : variable-list ) | |
7674 | ||
7675 | reduction-operator: | |
7676 | One of: + * - & ^ | && || */ | |
7677 | ||
7678 | static tree | |
7679 | c_parser_omp_clause_reduction (c_parser *parser, tree list) | |
7680 | { | |
c2255bc4 | 7681 | location_t clause_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7682 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7683 | { | |
7684 | enum tree_code code; | |
7685 | ||
7686 | switch (c_parser_peek_token (parser)->type) | |
7687 | { | |
7688 | case CPP_PLUS: | |
7689 | code = PLUS_EXPR; | |
7690 | break; | |
7691 | case CPP_MULT: | |
7692 | code = MULT_EXPR; | |
7693 | break; | |
7694 | case CPP_MINUS: | |
7695 | code = MINUS_EXPR; | |
7696 | break; | |
7697 | case CPP_AND: | |
7698 | code = BIT_AND_EXPR; | |
7699 | break; | |
7700 | case CPP_XOR: | |
7701 | code = BIT_XOR_EXPR; | |
7702 | break; | |
7703 | case CPP_OR: | |
7704 | code = BIT_IOR_EXPR; | |
7705 | break; | |
7706 | case CPP_AND_AND: | |
7707 | code = TRUTH_ANDIF_EXPR; | |
7708 | break; | |
7709 | case CPP_OR_OR: | |
7710 | code = TRUTH_ORIF_EXPR; | |
7711 | break; | |
7712 | default: | |
7713 | c_parser_error (parser, | |
7714 | "expected %<+%>, %<*%>, %<-%>, %<&%>, " | |
7715 | "%<^%>, %<|%>, %<&&%>, or %<||%>"); | |
7716 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); | |
7717 | return list; | |
7718 | } | |
7719 | c_parser_consume_token (parser); | |
7720 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
7721 | { | |
7722 | tree nl, c; | |
7723 | ||
c2255bc4 AH |
7724 | nl = c_parser_omp_variable_list (parser, clause_loc, |
7725 | OMP_CLAUSE_REDUCTION, list); | |
953ff289 DN |
7726 | for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c)) |
7727 | OMP_CLAUSE_REDUCTION_CODE (c) = code; | |
7728 | ||
7729 | list = nl; | |
7730 | } | |
7731 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7732 | } | |
7733 | return list; | |
7734 | } | |
7735 | ||
7736 | /* OpenMP 2.5: | |
7737 | schedule ( schedule-kind ) | |
7738 | schedule ( schedule-kind , expression ) | |
7739 | ||
7740 | schedule-kind: | |
a68ab351 | 7741 | static | dynamic | guided | runtime | auto |
953ff289 DN |
7742 | */ |
7743 | ||
7744 | static tree | |
7745 | c_parser_omp_clause_schedule (c_parser *parser, tree list) | |
7746 | { | |
7747 | tree c, t; | |
c2255bc4 | 7748 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7749 | |
7750 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7751 | return list; | |
7752 | ||
c2255bc4 | 7753 | c = build_omp_clause (loc, OMP_CLAUSE_SCHEDULE); |
953ff289 DN |
7754 | |
7755 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
7756 | { | |
7757 | tree kind = c_parser_peek_token (parser)->value; | |
7758 | const char *p = IDENTIFIER_POINTER (kind); | |
7759 | ||
7760 | switch (p[0]) | |
7761 | { | |
7762 | case 'd': | |
7763 | if (strcmp ("dynamic", p) != 0) | |
7764 | goto invalid_kind; | |
7765 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC; | |
7766 | break; | |
7767 | ||
7768 | case 'g': | |
7769 | if (strcmp ("guided", p) != 0) | |
7770 | goto invalid_kind; | |
7771 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED; | |
7772 | break; | |
7773 | ||
7774 | case 'r': | |
7775 | if (strcmp ("runtime", p) != 0) | |
7776 | goto invalid_kind; | |
7777 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME; | |
7778 | break; | |
7779 | ||
7780 | default: | |
7781 | goto invalid_kind; | |
7782 | } | |
7783 | } | |
7784 | else if (c_parser_next_token_is_keyword (parser, RID_STATIC)) | |
7785 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC; | |
a68ab351 JJ |
7786 | else if (c_parser_next_token_is_keyword (parser, RID_AUTO)) |
7787 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO; | |
953ff289 DN |
7788 | else |
7789 | goto invalid_kind; | |
7790 | ||
7791 | c_parser_consume_token (parser); | |
7792 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7793 | { | |
c7412148 | 7794 | location_t here; |
953ff289 DN |
7795 | c_parser_consume_token (parser); |
7796 | ||
c7412148 | 7797 | here = c_parser_peek_token (parser)->location; |
953ff289 | 7798 | t = c_parser_expr_no_commas (parser, NULL).value; |
928c19bb | 7799 | t = c_fully_fold (t, false, NULL); |
953ff289 DN |
7800 | |
7801 | if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME) | |
3ba09659 AH |
7802 | error_at (here, "schedule %<runtime%> does not take " |
7803 | "a %<chunk_size%> parameter"); | |
a68ab351 | 7804 | else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO) |
3ba09659 AH |
7805 | error_at (here, |
7806 | "schedule %<auto%> does not take " | |
7807 | "a %<chunk_size%> parameter"); | |
953ff289 DN |
7808 | else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE) |
7809 | OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t; | |
7810 | else | |
7811 | c_parser_error (parser, "expected integer expression"); | |
7812 | ||
7813 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7814 | } | |
7815 | else | |
7816 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
7817 | "expected %<,%> or %<)%>"); | |
7818 | ||
7819 | check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule"); | |
7820 | OMP_CLAUSE_CHAIN (c) = list; | |
7821 | return c; | |
7822 | ||
7823 | invalid_kind: | |
7824 | c_parser_error (parser, "invalid schedule kind"); | |
7825 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); | |
7826 | return list; | |
7827 | } | |
7828 | ||
7829 | /* OpenMP 2.5: | |
7830 | shared ( variable-list ) */ | |
7831 | ||
7832 | static tree | |
7833 | c_parser_omp_clause_shared (c_parser *parser, tree list) | |
7834 | { | |
7835 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list); | |
7836 | } | |
7837 | ||
a68ab351 JJ |
7838 | /* OpenMP 3.0: |
7839 | untied */ | |
7840 | ||
7841 | static tree | |
7842 | c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
7843 | { | |
7844 | tree c; | |
7845 | ||
7846 | /* FIXME: Should we allow duplicates? */ | |
7847 | check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied"); | |
7848 | ||
c2255bc4 AH |
7849 | c = build_omp_clause (c_parser_peek_token (parser)->location, |
7850 | OMP_CLAUSE_UNTIED); | |
a68ab351 | 7851 | OMP_CLAUSE_CHAIN (c) = list; |
c2255bc4 | 7852 | |
a68ab351 JJ |
7853 | return c; |
7854 | } | |
7855 | ||
953ff289 DN |
7856 | /* Parse all OpenMP clauses. The set clauses allowed by the directive |
7857 | is a bitmask in MASK. Return the list of clauses found; the result | |
7858 | of clause default goes in *pdefault. */ | |
7859 | ||
7860 | static tree | |
7861 | c_parser_omp_all_clauses (c_parser *parser, unsigned int mask, | |
7862 | const char *where) | |
7863 | { | |
7864 | tree clauses = NULL; | |
8085ca15 | 7865 | bool first = true; |
953ff289 DN |
7866 | |
7867 | while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
7868 | { | |
8085ca15 JJ |
7869 | location_t here; |
7870 | pragma_omp_clause c_kind; | |
953ff289 DN |
7871 | const char *c_name; |
7872 | tree prev = clauses; | |
7873 | ||
8085ca15 JJ |
7874 | if (!first && c_parser_next_token_is (parser, CPP_COMMA)) |
7875 | c_parser_consume_token (parser); | |
7876 | ||
7877 | first = false; | |
7878 | here = c_parser_peek_token (parser)->location; | |
7879 | c_kind = c_parser_omp_clause_name (parser); | |
7880 | ||
953ff289 DN |
7881 | switch (c_kind) |
7882 | { | |
a68ab351 JJ |
7883 | case PRAGMA_OMP_CLAUSE_COLLAPSE: |
7884 | clauses = c_parser_omp_clause_collapse (parser, clauses); | |
7885 | c_name = "collapse"; | |
7886 | break; | |
953ff289 DN |
7887 | case PRAGMA_OMP_CLAUSE_COPYIN: |
7888 | clauses = c_parser_omp_clause_copyin (parser, clauses); | |
7889 | c_name = "copyin"; | |
7890 | break; | |
7891 | case PRAGMA_OMP_CLAUSE_COPYPRIVATE: | |
7892 | clauses = c_parser_omp_clause_copyprivate (parser, clauses); | |
7893 | c_name = "copyprivate"; | |
7894 | break; | |
7895 | case PRAGMA_OMP_CLAUSE_DEFAULT: | |
7896 | clauses = c_parser_omp_clause_default (parser, clauses); | |
7897 | c_name = "default"; | |
7898 | break; | |
7899 | case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE: | |
7900 | clauses = c_parser_omp_clause_firstprivate (parser, clauses); | |
7901 | c_name = "firstprivate"; | |
7902 | break; | |
7903 | case PRAGMA_OMP_CLAUSE_IF: | |
7904 | clauses = c_parser_omp_clause_if (parser, clauses); | |
7905 | c_name = "if"; | |
7906 | break; | |
7907 | case PRAGMA_OMP_CLAUSE_LASTPRIVATE: | |
7908 | clauses = c_parser_omp_clause_lastprivate (parser, clauses); | |
7909 | c_name = "lastprivate"; | |
7910 | break; | |
7911 | case PRAGMA_OMP_CLAUSE_NOWAIT: | |
7912 | clauses = c_parser_omp_clause_nowait (parser, clauses); | |
7913 | c_name = "nowait"; | |
7914 | break; | |
7915 | case PRAGMA_OMP_CLAUSE_NUM_THREADS: | |
7916 | clauses = c_parser_omp_clause_num_threads (parser, clauses); | |
7917 | c_name = "num_threads"; | |
7918 | break; | |
7919 | case PRAGMA_OMP_CLAUSE_ORDERED: | |
7920 | clauses = c_parser_omp_clause_ordered (parser, clauses); | |
7921 | c_name = "ordered"; | |
7922 | break; | |
7923 | case PRAGMA_OMP_CLAUSE_PRIVATE: | |
7924 | clauses = c_parser_omp_clause_private (parser, clauses); | |
7925 | c_name = "private"; | |
7926 | break; | |
7927 | case PRAGMA_OMP_CLAUSE_REDUCTION: | |
7928 | clauses = c_parser_omp_clause_reduction (parser, clauses); | |
7929 | c_name = "reduction"; | |
7930 | break; | |
7931 | case PRAGMA_OMP_CLAUSE_SCHEDULE: | |
7932 | clauses = c_parser_omp_clause_schedule (parser, clauses); | |
7933 | c_name = "schedule"; | |
7934 | break; | |
7935 | case PRAGMA_OMP_CLAUSE_SHARED: | |
7936 | clauses = c_parser_omp_clause_shared (parser, clauses); | |
7937 | c_name = "shared"; | |
7938 | break; | |
a68ab351 JJ |
7939 | case PRAGMA_OMP_CLAUSE_UNTIED: |
7940 | clauses = c_parser_omp_clause_untied (parser, clauses); | |
7941 | c_name = "untied"; | |
7942 | break; | |
953ff289 DN |
7943 | default: |
7944 | c_parser_error (parser, "expected %<#pragma omp%> clause"); | |
7945 | goto saw_error; | |
7946 | } | |
7947 | ||
7948 | if (((mask >> c_kind) & 1) == 0 && !parser->error) | |
7949 | { | |
7950 | /* Remove the invalid clause(s) from the list to avoid | |
7951 | confusing the rest of the compiler. */ | |
7952 | clauses = prev; | |
3ba09659 | 7953 | error_at (here, "%qs is not valid for %qs", c_name, where); |
953ff289 DN |
7954 | } |
7955 | } | |
7956 | ||
7957 | saw_error: | |
7958 | c_parser_skip_to_pragma_eol (parser); | |
7959 | ||
7960 | return c_finish_omp_clauses (clauses); | |
7961 | } | |
7962 | ||
7963 | /* OpenMP 2.5: | |
7964 | structured-block: | |
7965 | statement | |
7966 | ||
7967 | In practice, we're also interested in adding the statement to an | |
7968 | outer node. So it is convenient if we work around the fact that | |
7969 | c_parser_statement calls add_stmt. */ | |
7970 | ||
7971 | static tree | |
7972 | c_parser_omp_structured_block (c_parser *parser) | |
7973 | { | |
7974 | tree stmt = push_stmt_list (); | |
7975 | c_parser_statement (parser); | |
7976 | return pop_stmt_list (stmt); | |
7977 | } | |
7978 | ||
7979 | /* OpenMP 2.5: | |
7980 | # pragma omp atomic new-line | |
7981 | expression-stmt | |
7982 | ||
7983 | expression-stmt: | |
7984 | x binop= expr | x++ | ++x | x-- | --x | |
7985 | binop: | |
7986 | +, *, -, /, &, ^, |, <<, >> | |
7987 | ||
b8698a0f | 7988 | where x is an lvalue expression with scalar type. |
c2255bc4 AH |
7989 | |
7990 | LOC is the location of the #pragma token. */ | |
953ff289 DN |
7991 | |
7992 | static void | |
c2255bc4 | 7993 | c_parser_omp_atomic (location_t loc, c_parser *parser) |
953ff289 DN |
7994 | { |
7995 | tree lhs, rhs; | |
fe89d797 | 7996 | tree stmt; |
953ff289 | 7997 | enum tree_code code; |
79addd1f | 7998 | struct c_expr rhs_expr; |
953ff289 DN |
7999 | |
8000 | c_parser_skip_to_pragma_eol (parser); | |
8001 | ||
8002 | lhs = c_parser_unary_expression (parser).value; | |
928c19bb | 8003 | lhs = c_fully_fold (lhs, false, NULL); |
953ff289 DN |
8004 | switch (TREE_CODE (lhs)) |
8005 | { | |
8006 | case ERROR_MARK: | |
8007 | saw_error: | |
8008 | c_parser_skip_to_end_of_block_or_statement (parser); | |
8009 | return; | |
8010 | ||
8011 | case PREINCREMENT_EXPR: | |
8012 | case POSTINCREMENT_EXPR: | |
8013 | lhs = TREE_OPERAND (lhs, 0); | |
8014 | code = PLUS_EXPR; | |
8015 | rhs = integer_one_node; | |
8016 | break; | |
8017 | ||
8018 | case PREDECREMENT_EXPR: | |
8019 | case POSTDECREMENT_EXPR: | |
8020 | lhs = TREE_OPERAND (lhs, 0); | |
8021 | code = MINUS_EXPR; | |
8022 | rhs = integer_one_node; | |
8023 | break; | |
8024 | ||
8025 | default: | |
8026 | switch (c_parser_peek_token (parser)->type) | |
8027 | { | |
8028 | case CPP_MULT_EQ: | |
8029 | code = MULT_EXPR; | |
8030 | break; | |
8031 | case CPP_DIV_EQ: | |
8032 | code = TRUNC_DIV_EXPR; | |
8033 | break; | |
8034 | case CPP_PLUS_EQ: | |
8035 | code = PLUS_EXPR; | |
8036 | break; | |
8037 | case CPP_MINUS_EQ: | |
8038 | code = MINUS_EXPR; | |
8039 | break; | |
8040 | case CPP_LSHIFT_EQ: | |
8041 | code = LSHIFT_EXPR; | |
8042 | break; | |
8043 | case CPP_RSHIFT_EQ: | |
8044 | code = RSHIFT_EXPR; | |
8045 | break; | |
8046 | case CPP_AND_EQ: | |
8047 | code = BIT_AND_EXPR; | |
8048 | break; | |
8049 | case CPP_OR_EQ: | |
8050 | code = BIT_IOR_EXPR; | |
8051 | break; | |
8052 | case CPP_XOR_EQ: | |
8053 | code = BIT_XOR_EXPR; | |
8054 | break; | |
8055 | default: | |
8056 | c_parser_error (parser, | |
8057 | "invalid operator for %<#pragma omp atomic%>"); | |
8058 | goto saw_error; | |
8059 | } | |
8060 | ||
8061 | c_parser_consume_token (parser); | |
c2255bc4 AH |
8062 | { |
8063 | location_t rhs_loc = c_parser_peek_token (parser)->location; | |
8064 | rhs_expr = c_parser_expression (parser); | |
ebfbbdc5 | 8065 | rhs_expr = default_function_array_read_conversion (rhs_loc, rhs_expr); |
c2255bc4 | 8066 | } |
79addd1f | 8067 | rhs = rhs_expr.value; |
928c19bb | 8068 | rhs = c_fully_fold (rhs, false, NULL); |
953ff289 DN |
8069 | break; |
8070 | } | |
c2255bc4 | 8071 | stmt = c_finish_omp_atomic (loc, code, lhs, rhs); |
fe89d797 MM |
8072 | if (stmt != error_mark_node) |
8073 | add_stmt (stmt); | |
953ff289 DN |
8074 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
8075 | } | |
8076 | ||
8077 | ||
8078 | /* OpenMP 2.5: | |
8079 | # pragma omp barrier new-line | |
8080 | */ | |
8081 | ||
8082 | static void | |
8083 | c_parser_omp_barrier (c_parser *parser) | |
8084 | { | |
c2255bc4 | 8085 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
8086 | c_parser_consume_pragma (parser); |
8087 | c_parser_skip_to_pragma_eol (parser); | |
8088 | ||
c2255bc4 | 8089 | c_finish_omp_barrier (loc); |
953ff289 DN |
8090 | } |
8091 | ||
8092 | /* OpenMP 2.5: | |
8093 | # pragma omp critical [(name)] new-line | |
8094 | structured-block | |
c2255bc4 AH |
8095 | |
8096 | LOC is the location of the #pragma itself. */ | |
953ff289 DN |
8097 | |
8098 | static tree | |
c2255bc4 | 8099 | c_parser_omp_critical (location_t loc, c_parser *parser) |
953ff289 DN |
8100 | { |
8101 | tree stmt, name = NULL; | |
8102 | ||
8103 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
8104 | { | |
8105 | c_parser_consume_token (parser); | |
8106 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
8107 | { | |
8108 | name = c_parser_peek_token (parser)->value; | |
8109 | c_parser_consume_token (parser); | |
8110 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
8111 | } | |
8112 | else | |
8113 | c_parser_error (parser, "expected identifier"); | |
8114 | } | |
8115 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
8116 | c_parser_error (parser, "expected %<(%> or end of line"); | |
8117 | c_parser_skip_to_pragma_eol (parser); | |
8118 | ||
8119 | stmt = c_parser_omp_structured_block (parser); | |
c2255bc4 | 8120 | return c_finish_omp_critical (loc, stmt, name); |
953ff289 DN |
8121 | } |
8122 | ||
8123 | /* OpenMP 2.5: | |
8124 | # pragma omp flush flush-vars[opt] new-line | |
8125 | ||
8126 | flush-vars: | |
8127 | ( variable-list ) */ | |
8128 | ||
8129 | static void | |
8130 | c_parser_omp_flush (c_parser *parser) | |
8131 | { | |
c2255bc4 | 8132 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
8133 | c_parser_consume_pragma (parser); |
8134 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
d75d71e0 | 8135 | c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
953ff289 DN |
8136 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) |
8137 | c_parser_error (parser, "expected %<(%> or end of line"); | |
8138 | c_parser_skip_to_pragma_eol (parser); | |
8139 | ||
c2255bc4 | 8140 | c_finish_omp_flush (loc); |
953ff289 DN |
8141 | } |
8142 | ||
fa10beec | 8143 | /* Parse the restricted form of the for statement allowed by OpenMP. |
953ff289 | 8144 | The real trick here is to determine the loop control variable early |
c2255bc4 AH |
8145 | so that we can push a new decl if necessary to make it private. |
8146 | LOC is the location of the OMP in "#pragma omp". */ | |
953ff289 DN |
8147 | |
8148 | static tree | |
c2255bc4 AH |
8149 | c_parser_omp_for_loop (location_t loc, |
8150 | c_parser *parser, tree clauses, tree *par_clauses) | |
953ff289 | 8151 | { |
a68ab351 JJ |
8152 | tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl; |
8153 | tree declv, condv, incrv, initv, for_block = NULL, ret = NULL; | |
a68ab351 JJ |
8154 | bool fail = false, open_brace_parsed = false; |
8155 | int i, collapse = 1, nbraces = 0; | |
c2255bc4 | 8156 | location_t for_loc; |
a68ab351 JJ |
8157 | |
8158 | for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl)) | |
8159 | if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE) | |
8160 | collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0); | |
8161 | ||
8162 | gcc_assert (collapse >= 1); | |
8163 | ||
8164 | declv = make_tree_vec (collapse); | |
8165 | initv = make_tree_vec (collapse); | |
8166 | condv = make_tree_vec (collapse); | |
8167 | incrv = make_tree_vec (collapse); | |
953ff289 DN |
8168 | |
8169 | if (!c_parser_next_token_is_keyword (parser, RID_FOR)) | |
8170 | { | |
8171 | c_parser_error (parser, "for statement expected"); | |
8172 | return NULL; | |
8173 | } | |
c2255bc4 | 8174 | for_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
8175 | c_parser_consume_token (parser); |
8176 | ||
a68ab351 | 8177 | for (i = 0; i < collapse; i++) |
953ff289 | 8178 | { |
a68ab351 | 8179 | int bracecount = 0; |
953ff289 | 8180 | |
a68ab351 JJ |
8181 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
8182 | goto pop_scopes; | |
953ff289 | 8183 | |
a68ab351 | 8184 | /* Parse the initialization declaration or expression. */ |
32912286 | 8185 | if (c_parser_next_token_starts_declaration (parser)) |
a68ab351 JJ |
8186 | { |
8187 | if (i > 0) | |
8188 | for_block | |
8189 | = tree_cons (NULL, c_begin_compound_stmt (true), for_block); | |
32912286 | 8190 | c_parser_declaration_or_fndef (parser, true, true, true, true, true); |
c2255bc4 | 8191 | decl = check_for_loop_decls (for_loc); |
a68ab351 JJ |
8192 | if (decl == NULL) |
8193 | goto error_init; | |
8194 | if (DECL_INITIAL (decl) == error_mark_node) | |
8195 | decl = error_mark_node; | |
8196 | init = decl; | |
8197 | } | |
8198 | else if (c_parser_next_token_is (parser, CPP_NAME) | |
8199 | && c_parser_peek_2nd_token (parser)->type == CPP_EQ) | |
8200 | { | |
32e8bb8e | 8201 | struct c_expr decl_exp; |
a68ab351 | 8202 | struct c_expr init_exp; |
c9f9eb5d | 8203 | location_t init_loc; |
a68ab351 | 8204 | |
32e8bb8e ILT |
8205 | decl_exp = c_parser_postfix_expression (parser); |
8206 | decl = decl_exp.value; | |
a68ab351 JJ |
8207 | |
8208 | c_parser_require (parser, CPP_EQ, "expected %<=%>"); | |
8209 | ||
c2255bc4 | 8210 | init_loc = c_parser_peek_token (parser)->location; |
a68ab351 | 8211 | init_exp = c_parser_expr_no_commas (parser, NULL); |
ebfbbdc5 JJ |
8212 | init_exp = default_function_array_read_conversion (init_loc, |
8213 | init_exp); | |
32e8bb8e | 8214 | init = build_modify_expr (init_loc, decl, decl_exp.original_type, |
c2255bc4 | 8215 | NOP_EXPR, init_loc, init_exp.value, |
bbbbb16a | 8216 | init_exp.original_type); |
c2255bc4 | 8217 | init = c_process_expr_stmt (init_loc, init); |
953ff289 | 8218 | |
a68ab351 JJ |
8219 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
8220 | } | |
8221 | else | |
8222 | { | |
8223 | error_init: | |
8224 | c_parser_error (parser, | |
8225 | "expected iteration declaration or initialization"); | |
8226 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
8227 | "expected %<)%>"); | |
8228 | fail = true; | |
8229 | goto parse_next; | |
8230 | } | |
8231 | ||
8232 | /* Parse the loop condition. */ | |
8233 | cond = NULL_TREE; | |
8234 | if (c_parser_next_token_is_not (parser, CPP_SEMICOLON)) | |
8235 | { | |
3ba09659 | 8236 | location_t cond_loc = c_parser_peek_token (parser)->location; |
c5cdb03f | 8237 | struct c_expr cond_expr = c_parser_binary_expression (parser, NULL); |
3ba09659 | 8238 | |
c5cdb03f | 8239 | cond = cond_expr.value; |
3ba09659 | 8240 | cond = c_objc_common_truthvalue_conversion (cond_loc, cond); |
928c19bb | 8241 | cond = c_fully_fold (cond, false, NULL); |
c5cdb03f JJ |
8242 | switch (cond_expr.original_code) |
8243 | { | |
8244 | case GT_EXPR: | |
8245 | case GE_EXPR: | |
8246 | case LT_EXPR: | |
8247 | case LE_EXPR: | |
8248 | break; | |
8249 | default: | |
8250 | /* Can't be cond = error_mark_node, because we want to preserve | |
8251 | the location until c_finish_omp_for. */ | |
8252 | cond = build1 (NOP_EXPR, boolean_type_node, error_mark_node); | |
8253 | break; | |
8254 | } | |
c9f9eb5d | 8255 | protected_set_expr_location (cond, cond_loc); |
a68ab351 | 8256 | } |
953ff289 | 8257 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
953ff289 | 8258 | |
a68ab351 JJ |
8259 | /* Parse the increment expression. */ |
8260 | incr = NULL_TREE; | |
8261 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN)) | |
c9f9eb5d AH |
8262 | { |
8263 | location_t incr_loc = c_parser_peek_token (parser)->location; | |
8264 | ||
c2255bc4 AH |
8265 | incr = c_process_expr_stmt (incr_loc, |
8266 | c_parser_expression (parser).value); | |
c9f9eb5d | 8267 | } |
a68ab351 | 8268 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
953ff289 | 8269 | |
a68ab351 JJ |
8270 | if (decl == NULL || decl == error_mark_node || init == error_mark_node) |
8271 | fail = true; | |
8272 | else | |
8273 | { | |
8274 | TREE_VEC_ELT (declv, i) = decl; | |
8275 | TREE_VEC_ELT (initv, i) = init; | |
8276 | TREE_VEC_ELT (condv, i) = cond; | |
8277 | TREE_VEC_ELT (incrv, i) = incr; | |
8278 | } | |
8279 | ||
8280 | parse_next: | |
8281 | if (i == collapse - 1) | |
8282 | break; | |
8283 | ||
8284 | /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed | |
8285 | in between the collapsed for loops to be still considered perfectly | |
8286 | nested. Hopefully the final version clarifies this. | |
8287 | For now handle (multiple) {'s and empty statements. */ | |
8288 | do | |
8289 | { | |
8290 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
8291 | { | |
8292 | c_parser_consume_token (parser); | |
8293 | break; | |
8294 | } | |
8295 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
8296 | { | |
8297 | c_parser_consume_token (parser); | |
8298 | bracecount++; | |
8299 | } | |
8300 | else if (bracecount | |
8301 | && c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
8302 | c_parser_consume_token (parser); | |
8303 | else | |
8304 | { | |
8305 | c_parser_error (parser, "not enough perfectly nested loops"); | |
8306 | if (bracecount) | |
8307 | { | |
8308 | open_brace_parsed = true; | |
8309 | bracecount--; | |
8310 | } | |
8311 | fail = true; | |
8312 | collapse = 0; | |
8313 | break; | |
8314 | } | |
8315 | } | |
8316 | while (1); | |
8317 | ||
8318 | nbraces += bracecount; | |
8319 | } | |
953ff289 | 8320 | |
953ff289 DN |
8321 | save_break = c_break_label; |
8322 | c_break_label = size_one_node; | |
8323 | save_cont = c_cont_label; | |
8324 | c_cont_label = NULL_TREE; | |
8325 | body = push_stmt_list (); | |
8326 | ||
a68ab351 JJ |
8327 | if (open_brace_parsed) |
8328 | { | |
c2255bc4 | 8329 | location_t here = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
8330 | stmt = c_begin_compound_stmt (true); |
8331 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 8332 | add_stmt (c_end_compound_stmt (here, stmt, true)); |
a68ab351 JJ |
8333 | } |
8334 | else | |
8335 | add_stmt (c_parser_c99_block_statement (parser)); | |
953ff289 | 8336 | if (c_cont_label) |
c2255bc4 AH |
8337 | { |
8338 | tree t = build1 (LABEL_EXPR, void_type_node, c_cont_label); | |
8339 | SET_EXPR_LOCATION (t, loc); | |
8340 | add_stmt (t); | |
8341 | } | |
953ff289 DN |
8342 | |
8343 | body = pop_stmt_list (body); | |
8344 | c_break_label = save_break; | |
8345 | c_cont_label = save_cont; | |
8346 | ||
a68ab351 JJ |
8347 | while (nbraces) |
8348 | { | |
8349 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
8350 | { | |
8351 | c_parser_consume_token (parser); | |
8352 | nbraces--; | |
8353 | } | |
8354 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
8355 | c_parser_consume_token (parser); | |
8356 | else | |
8357 | { | |
8358 | c_parser_error (parser, "collapsed loops not perfectly nested"); | |
8359 | while (nbraces) | |
8360 | { | |
c2255bc4 | 8361 | location_t here = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
8362 | stmt = c_begin_compound_stmt (true); |
8363 | add_stmt (body); | |
8364 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 8365 | body = c_end_compound_stmt (here, stmt, true); |
a68ab351 JJ |
8366 | nbraces--; |
8367 | } | |
8368 | goto pop_scopes; | |
8369 | } | |
8370 | } | |
8371 | ||
61c3a446 | 8372 | /* Only bother calling c_finish_omp_for if we haven't already generated |
953ff289 | 8373 | an error from the initialization parsing. */ |
a68ab351 JJ |
8374 | if (!fail) |
8375 | { | |
8376 | stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL); | |
8377 | if (stmt) | |
8378 | { | |
8379 | if (par_clauses != NULL) | |
8380 | { | |
8381 | tree *c; | |
8382 | for (c = par_clauses; *c ; ) | |
8383 | if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE | |
8384 | && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE) | |
8385 | c = &OMP_CLAUSE_CHAIN (*c); | |
8386 | else | |
8387 | { | |
8388 | for (i = 0; i < collapse; i++) | |
8389 | if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c)) | |
8390 | break; | |
8391 | if (i == collapse) | |
8392 | c = &OMP_CLAUSE_CHAIN (*c); | |
8393 | else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE) | |
8394 | { | |
3ba09659 AH |
8395 | error_at (loc, |
8396 | "iteration variable %qD should not be firstprivate", | |
8397 | OMP_CLAUSE_DECL (*c)); | |
a68ab351 JJ |
8398 | *c = OMP_CLAUSE_CHAIN (*c); |
8399 | } | |
8400 | else | |
8401 | { | |
8402 | /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES, | |
8403 | change it to shared (decl) in | |
8404 | OMP_PARALLEL_CLAUSES. */ | |
c2255bc4 AH |
8405 | tree l = build_omp_clause (OMP_CLAUSE_LOCATION (*c), |
8406 | OMP_CLAUSE_LASTPRIVATE); | |
a68ab351 JJ |
8407 | OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c); |
8408 | OMP_CLAUSE_CHAIN (l) = clauses; | |
8409 | clauses = l; | |
8410 | OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED); | |
8411 | } | |
8412 | } | |
8413 | } | |
8414 | OMP_FOR_CLAUSES (stmt) = clauses; | |
8415 | } | |
8416 | ret = stmt; | |
8417 | } | |
8418 | pop_scopes: | |
8419 | while (for_block) | |
8420 | { | |
c2255bc4 AH |
8421 | /* FIXME diagnostics: LOC below should be the actual location of |
8422 | this particular for block. We need to build a list of | |
8423 | locations to go along with FOR_BLOCK. */ | |
8424 | stmt = c_end_compound_stmt (loc, TREE_VALUE (for_block), true); | |
a68ab351 JJ |
8425 | add_stmt (stmt); |
8426 | for_block = TREE_CHAIN (for_block); | |
8427 | } | |
8428 | return ret; | |
953ff289 DN |
8429 | } |
8430 | ||
8431 | /* OpenMP 2.5: | |
8432 | #pragma omp for for-clause[optseq] new-line | |
8433 | for-loop | |
c2255bc4 AH |
8434 | |
8435 | LOC is the location of the #pragma token. | |
953ff289 DN |
8436 | */ |
8437 | ||
8438 | #define OMP_FOR_CLAUSE_MASK \ | |
8439 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8440 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8441 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
8442 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
8443 | | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \ | |
8444 | | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \ | |
a68ab351 | 8445 | | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \ |
953ff289 DN |
8446 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) |
8447 | ||
8448 | static tree | |
c2255bc4 | 8449 | c_parser_omp_for (location_t loc, c_parser *parser) |
953ff289 DN |
8450 | { |
8451 | tree block, clauses, ret; | |
8452 | ||
8453 | clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK, | |
8454 | "#pragma omp for"); | |
8455 | ||
8456 | block = c_begin_compound_stmt (true); | |
c2255bc4 AH |
8457 | ret = c_parser_omp_for_loop (loc, parser, clauses, NULL); |
8458 | block = c_end_compound_stmt (loc, block, true); | |
953ff289 DN |
8459 | add_stmt (block); |
8460 | ||
8461 | return ret; | |
8462 | } | |
8463 | ||
8464 | /* OpenMP 2.5: | |
8465 | # pragma omp master new-line | |
8466 | structured-block | |
c2255bc4 AH |
8467 | |
8468 | LOC is the location of the #pragma token. | |
953ff289 DN |
8469 | */ |
8470 | ||
8471 | static tree | |
c2255bc4 | 8472 | c_parser_omp_master (location_t loc, c_parser *parser) |
953ff289 DN |
8473 | { |
8474 | c_parser_skip_to_pragma_eol (parser); | |
c2255bc4 | 8475 | return c_finish_omp_master (loc, c_parser_omp_structured_block (parser)); |
953ff289 DN |
8476 | } |
8477 | ||
8478 | /* OpenMP 2.5: | |
8479 | # pragma omp ordered new-line | |
8480 | structured-block | |
c2255bc4 AH |
8481 | |
8482 | LOC is the location of the #pragma itself. | |
953ff289 DN |
8483 | */ |
8484 | ||
8485 | static tree | |
c2255bc4 | 8486 | c_parser_omp_ordered (location_t loc, c_parser *parser) |
953ff289 DN |
8487 | { |
8488 | c_parser_skip_to_pragma_eol (parser); | |
c2255bc4 | 8489 | return c_finish_omp_ordered (loc, c_parser_omp_structured_block (parser)); |
953ff289 DN |
8490 | } |
8491 | ||
8492 | /* OpenMP 2.5: | |
8493 | ||
8494 | section-scope: | |
8495 | { section-sequence } | |
8496 | ||
8497 | section-sequence: | |
8498 | section-directive[opt] structured-block | |
b8698a0f | 8499 | section-sequence section-directive structured-block |
c2255bc4 AH |
8500 | |
8501 | SECTIONS_LOC is the location of the #pragma omp sections. */ | |
953ff289 DN |
8502 | |
8503 | static tree | |
c2255bc4 | 8504 | c_parser_omp_sections_scope (location_t sections_loc, c_parser *parser) |
953ff289 DN |
8505 | { |
8506 | tree stmt, substmt; | |
8507 | bool error_suppress = false; | |
8508 | location_t loc; | |
8509 | ||
c2255bc4 | 8510 | loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
8511 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
8512 | { | |
8513 | /* Avoid skipping until the end of the block. */ | |
8514 | parser->error = false; | |
8515 | return NULL_TREE; | |
8516 | } | |
8517 | ||
8518 | stmt = push_stmt_list (); | |
8519 | ||
953ff289 DN |
8520 | if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION) |
8521 | { | |
8522 | substmt = push_stmt_list (); | |
8523 | ||
8524 | while (1) | |
8525 | { | |
8526 | c_parser_statement (parser); | |
8527 | ||
8528 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
8529 | break; | |
8530 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
8531 | break; | |
8532 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
8533 | break; | |
8534 | } | |
8535 | ||
8536 | substmt = pop_stmt_list (substmt); | |
8537 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
8538 | SET_EXPR_LOCATION (substmt, loc); | |
8539 | add_stmt (substmt); | |
8540 | } | |
8541 | ||
8542 | while (1) | |
8543 | { | |
8544 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
8545 | break; | |
8546 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
8547 | break; | |
8548 | ||
8549 | loc = c_parser_peek_token (parser)->location; | |
8550 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
8551 | { | |
8552 | c_parser_consume_pragma (parser); | |
8553 | c_parser_skip_to_pragma_eol (parser); | |
8554 | error_suppress = false; | |
8555 | } | |
8556 | else if (!error_suppress) | |
8557 | { | |
3ba09659 | 8558 | error_at (loc, "expected %<#pragma omp section%> or %<}%>"); |
953ff289 DN |
8559 | error_suppress = true; |
8560 | } | |
8561 | ||
8562 | substmt = c_parser_omp_structured_block (parser); | |
8563 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
8564 | SET_EXPR_LOCATION (substmt, loc); | |
8565 | add_stmt (substmt); | |
8566 | } | |
8567 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, | |
8568 | "expected %<#pragma omp section%> or %<}%>"); | |
8569 | ||
8570 | substmt = pop_stmt_list (stmt); | |
8571 | ||
8572 | stmt = make_node (OMP_SECTIONS); | |
c2255bc4 | 8573 | SET_EXPR_LOCATION (stmt, sections_loc); |
953ff289 DN |
8574 | TREE_TYPE (stmt) = void_type_node; |
8575 | OMP_SECTIONS_BODY (stmt) = substmt; | |
8576 | ||
8577 | return add_stmt (stmt); | |
8578 | } | |
8579 | ||
8580 | /* OpenMP 2.5: | |
8581 | # pragma omp sections sections-clause[optseq] newline | |
8582 | sections-scope | |
c2255bc4 AH |
8583 | |
8584 | LOC is the location of the #pragma token. | |
953ff289 DN |
8585 | */ |
8586 | ||
8587 | #define OMP_SECTIONS_CLAUSE_MASK \ | |
8588 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8589 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8590 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
8591 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
8592 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
8593 | ||
8594 | static tree | |
c2255bc4 | 8595 | c_parser_omp_sections (location_t loc, c_parser *parser) |
953ff289 DN |
8596 | { |
8597 | tree block, clauses, ret; | |
8598 | ||
8599 | clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK, | |
8600 | "#pragma omp sections"); | |
8601 | ||
8602 | block = c_begin_compound_stmt (true); | |
c2255bc4 | 8603 | ret = c_parser_omp_sections_scope (loc, parser); |
953ff289 DN |
8604 | if (ret) |
8605 | OMP_SECTIONS_CLAUSES (ret) = clauses; | |
c2255bc4 | 8606 | block = c_end_compound_stmt (loc, block, true); |
953ff289 DN |
8607 | add_stmt (block); |
8608 | ||
8609 | return ret; | |
8610 | } | |
8611 | ||
8612 | /* OpenMP 2.5: | |
8613 | # pragma parallel parallel-clause new-line | |
8614 | # pragma parallel for parallel-for-clause new-line | |
8615 | # pragma parallel sections parallel-sections-clause new-line | |
c2255bc4 AH |
8616 | |
8617 | LOC is the location of the #pragma token. | |
953ff289 DN |
8618 | */ |
8619 | ||
8620 | #define OMP_PARALLEL_CLAUSE_MASK \ | |
8621 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
8622 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8623 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8624 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
8625 | | (1u << PRAGMA_OMP_CLAUSE_SHARED) \ | |
8626 | | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \ | |
8627 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
8628 | | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS)) | |
8629 | ||
8630 | static tree | |
c2255bc4 | 8631 | c_parser_omp_parallel (location_t loc, c_parser *parser) |
953ff289 DN |
8632 | { |
8633 | enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL; | |
8634 | const char *p_name = "#pragma omp parallel"; | |
8635 | tree stmt, clauses, par_clause, ws_clause, block; | |
8636 | unsigned int mask = OMP_PARALLEL_CLAUSE_MASK; | |
8637 | ||
8638 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
8639 | { | |
8640 | c_parser_consume_token (parser); | |
8641 | p_kind = PRAGMA_OMP_PARALLEL_FOR; | |
8642 | p_name = "#pragma omp parallel for"; | |
8643 | mask |= OMP_FOR_CLAUSE_MASK; | |
8644 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
8645 | } | |
8646 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
8647 | { | |
8648 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
8649 | if (strcmp (p, "sections") == 0) | |
8650 | { | |
8651 | c_parser_consume_token (parser); | |
8652 | p_kind = PRAGMA_OMP_PARALLEL_SECTIONS; | |
8653 | p_name = "#pragma omp parallel sections"; | |
8654 | mask |= OMP_SECTIONS_CLAUSE_MASK; | |
8655 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
8656 | } | |
8657 | } | |
8658 | ||
8659 | clauses = c_parser_omp_all_clauses (parser, mask, p_name); | |
8660 | ||
8661 | switch (p_kind) | |
8662 | { | |
8663 | case PRAGMA_OMP_PARALLEL: | |
8664 | block = c_begin_omp_parallel (); | |
8665 | c_parser_statement (parser); | |
c2255bc4 | 8666 | stmt = c_finish_omp_parallel (loc, clauses, block); |
953ff289 DN |
8667 | break; |
8668 | ||
8669 | case PRAGMA_OMP_PARALLEL_FOR: | |
8670 | block = c_begin_omp_parallel (); | |
c2255bc4 AH |
8671 | c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause); |
8672 | c_parser_omp_for_loop (loc, parser, ws_clause, &par_clause); | |
8673 | stmt = c_finish_omp_parallel (loc, par_clause, block); | |
761041be | 8674 | OMP_PARALLEL_COMBINED (stmt) = 1; |
953ff289 DN |
8675 | break; |
8676 | ||
8677 | case PRAGMA_OMP_PARALLEL_SECTIONS: | |
8678 | block = c_begin_omp_parallel (); | |
c2255bc4 AH |
8679 | c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause); |
8680 | stmt = c_parser_omp_sections_scope (loc, parser); | |
953ff289 DN |
8681 | if (stmt) |
8682 | OMP_SECTIONS_CLAUSES (stmt) = ws_clause; | |
c2255bc4 | 8683 | stmt = c_finish_omp_parallel (loc, par_clause, block); |
761041be | 8684 | OMP_PARALLEL_COMBINED (stmt) = 1; |
953ff289 DN |
8685 | break; |
8686 | ||
8687 | default: | |
8688 | gcc_unreachable (); | |
8689 | } | |
8690 | ||
8691 | return stmt; | |
8692 | } | |
8693 | ||
8694 | /* OpenMP 2.5: | |
8695 | # pragma omp single single-clause[optseq] new-line | |
8696 | structured-block | |
c2255bc4 AH |
8697 | |
8698 | LOC is the location of the #pragma. | |
953ff289 DN |
8699 | */ |
8700 | ||
8701 | #define OMP_SINGLE_CLAUSE_MASK \ | |
8702 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8703 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8704 | | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \ | |
8705 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
8706 | ||
8707 | static tree | |
c2255bc4 | 8708 | c_parser_omp_single (location_t loc, c_parser *parser) |
953ff289 DN |
8709 | { |
8710 | tree stmt = make_node (OMP_SINGLE); | |
c2255bc4 | 8711 | SET_EXPR_LOCATION (stmt, loc); |
953ff289 DN |
8712 | TREE_TYPE (stmt) = void_type_node; |
8713 | ||
8714 | OMP_SINGLE_CLAUSES (stmt) | |
8715 | = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK, | |
8716 | "#pragma omp single"); | |
8717 | OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser); | |
8718 | ||
8719 | return add_stmt (stmt); | |
8720 | } | |
8721 | ||
a68ab351 JJ |
8722 | /* OpenMP 3.0: |
8723 | # pragma omp task task-clause[optseq] new-line | |
c2255bc4 AH |
8724 | |
8725 | LOC is the location of the #pragma. | |
a68ab351 JJ |
8726 | */ |
8727 | ||
8728 | #define OMP_TASK_CLAUSE_MASK \ | |
8729 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
8730 | | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \ | |
8731 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
8732 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8733 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8734 | | (1u << PRAGMA_OMP_CLAUSE_SHARED)) | |
8735 | ||
8736 | static tree | |
c2255bc4 | 8737 | c_parser_omp_task (location_t loc, c_parser *parser) |
a68ab351 JJ |
8738 | { |
8739 | tree clauses, block; | |
8740 | ||
8741 | clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK, | |
8742 | "#pragma omp task"); | |
8743 | ||
8744 | block = c_begin_omp_task (); | |
8745 | c_parser_statement (parser); | |
c2255bc4 | 8746 | return c_finish_omp_task (loc, clauses, block); |
a68ab351 JJ |
8747 | } |
8748 | ||
8749 | /* OpenMP 3.0: | |
8750 | # pragma omp taskwait new-line | |
8751 | */ | |
8752 | ||
8753 | static void | |
8754 | c_parser_omp_taskwait (c_parser *parser) | |
8755 | { | |
c2255bc4 | 8756 | location_t loc = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
8757 | c_parser_consume_pragma (parser); |
8758 | c_parser_skip_to_pragma_eol (parser); | |
8759 | ||
c2255bc4 | 8760 | c_finish_omp_taskwait (loc); |
a68ab351 | 8761 | } |
953ff289 DN |
8762 | |
8763 | /* Main entry point to parsing most OpenMP pragmas. */ | |
8764 | ||
8765 | static void | |
8766 | c_parser_omp_construct (c_parser *parser) | |
8767 | { | |
8768 | enum pragma_kind p_kind; | |
8769 | location_t loc; | |
8770 | tree stmt; | |
8771 | ||
8772 | loc = c_parser_peek_token (parser)->location; | |
8773 | p_kind = c_parser_peek_token (parser)->pragma_kind; | |
8774 | c_parser_consume_pragma (parser); | |
8775 | ||
8776 | switch (p_kind) | |
8777 | { | |
8778 | case PRAGMA_OMP_ATOMIC: | |
c2255bc4 | 8779 | c_parser_omp_atomic (loc, parser); |
953ff289 DN |
8780 | return; |
8781 | case PRAGMA_OMP_CRITICAL: | |
c2255bc4 | 8782 | stmt = c_parser_omp_critical (loc, parser); |
953ff289 DN |
8783 | break; |
8784 | case PRAGMA_OMP_FOR: | |
c2255bc4 | 8785 | stmt = c_parser_omp_for (loc, parser); |
953ff289 DN |
8786 | break; |
8787 | case PRAGMA_OMP_MASTER: | |
c2255bc4 | 8788 | stmt = c_parser_omp_master (loc, parser); |
953ff289 DN |
8789 | break; |
8790 | case PRAGMA_OMP_ORDERED: | |
c2255bc4 | 8791 | stmt = c_parser_omp_ordered (loc, parser); |
953ff289 DN |
8792 | break; |
8793 | case PRAGMA_OMP_PARALLEL: | |
c2255bc4 | 8794 | stmt = c_parser_omp_parallel (loc, parser); |
953ff289 DN |
8795 | break; |
8796 | case PRAGMA_OMP_SECTIONS: | |
c2255bc4 | 8797 | stmt = c_parser_omp_sections (loc, parser); |
953ff289 DN |
8798 | break; |
8799 | case PRAGMA_OMP_SINGLE: | |
c2255bc4 | 8800 | stmt = c_parser_omp_single (loc, parser); |
953ff289 | 8801 | break; |
a68ab351 | 8802 | case PRAGMA_OMP_TASK: |
c2255bc4 | 8803 | stmt = c_parser_omp_task (loc, parser); |
a68ab351 | 8804 | break; |
953ff289 DN |
8805 | default: |
8806 | gcc_unreachable (); | |
8807 | } | |
8808 | ||
8809 | if (stmt) | |
c2255bc4 | 8810 | gcc_assert (EXPR_LOCATION (stmt) != UNKNOWN_LOCATION); |
953ff289 DN |
8811 | } |
8812 | ||
8813 | ||
8814 | /* OpenMP 2.5: | |
8815 | # pragma omp threadprivate (variable-list) */ | |
8816 | ||
8817 | static void | |
8818 | c_parser_omp_threadprivate (c_parser *parser) | |
8819 | { | |
8820 | tree vars, t; | |
c2255bc4 | 8821 | location_t loc; |
953ff289 DN |
8822 | |
8823 | c_parser_consume_pragma (parser); | |
c2255bc4 | 8824 | loc = c_parser_peek_token (parser)->location; |
d75d71e0 | 8825 | vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
953ff289 | 8826 | |
953ff289 DN |
8827 | /* Mark every variable in VARS to be assigned thread local storage. */ |
8828 | for (t = vars; t; t = TREE_CHAIN (t)) | |
8829 | { | |
8830 | tree v = TREE_PURPOSE (t); | |
8831 | ||
c2255bc4 AH |
8832 | /* FIXME diagnostics: Ideally we should keep individual |
8833 | locations for all the variables in the var list to make the | |
8834 | following errors more precise. Perhaps | |
8835 | c_parser_omp_var_list_parens() should construct a list of | |
8836 | locations to go along with the var list. */ | |
8837 | ||
953ff289 DN |
8838 | /* If V had already been marked threadprivate, it doesn't matter |
8839 | whether it had been used prior to this point. */ | |
5df27e4a | 8840 | if (TREE_CODE (v) != VAR_DECL) |
c2255bc4 | 8841 | error_at (loc, "%qD is not a variable", v); |
5df27e4a | 8842 | else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v)) |
c2255bc4 | 8843 | error_at (loc, "%qE declared %<threadprivate%> after first use", v); |
953ff289 | 8844 | else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v)) |
c2255bc4 | 8845 | error_at (loc, "automatic variable %qE cannot be %<threadprivate%>", v); |
5df27e4a JJ |
8846 | else if (TREE_TYPE (v) == error_mark_node) |
8847 | ; | |
953ff289 | 8848 | else if (! COMPLETE_TYPE_P (TREE_TYPE (v))) |
c2255bc4 | 8849 | error_at (loc, "%<threadprivate%> %qE has incomplete type", v); |
953ff289 DN |
8850 | else |
8851 | { | |
8852 | if (! DECL_THREAD_LOCAL_P (v)) | |
8853 | { | |
8854 | DECL_TLS_MODEL (v) = decl_default_tls_model (v); | |
8855 | /* If rtl has been already set for this var, call | |
8856 | make_decl_rtl once again, so that encode_section_info | |
8857 | has a chance to look at the new decl flags. */ | |
8858 | if (DECL_RTL_SET_P (v)) | |
8859 | make_decl_rtl (v); | |
8860 | } | |
8861 | C_DECL_THREADPRIVATE_P (v) = 1; | |
8862 | } | |
8863 | } | |
8864 | ||
8865 | c_parser_skip_to_pragma_eol (parser); | |
8866 | } | |
8867 | ||
bc4071dd | 8868 | \f |
27bf414c JM |
8869 | /* Parse a single source file. */ |
8870 | ||
8871 | void | |
8872 | c_parse_file (void) | |
8873 | { | |
bc4071dd RH |
8874 | /* Use local storage to begin. If the first token is a pragma, parse it. |
8875 | If it is #pragma GCC pch_preprocess, then this will load a PCH file | |
8876 | which will cause garbage collection. */ | |
8877 | c_parser tparser; | |
8878 | ||
8879 | memset (&tparser, 0, sizeof tparser); | |
8880 | the_parser = &tparser; | |
8881 | ||
8882 | if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS) | |
8883 | c_parser_pragma_pch_preprocess (&tparser); | |
8884 | ||
8885 | the_parser = GGC_NEW (c_parser); | |
8886 | *the_parser = tparser; | |
8887 | ||
f9417da1 RG |
8888 | /* Initialize EH, if we've been told to do so. */ |
8889 | if (flag_exceptions) | |
1d65f45c | 8890 | using_eh_for_cleanups (); |
f9417da1 | 8891 | |
27bf414c JM |
8892 | c_parser_translation_unit (the_parser); |
8893 | the_parser = NULL; | |
8894 | } | |
8895 | ||
8896 | #include "gt-c-parser.h" |