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comparison gcc/c-family/c-common.h @ 68:561a7518be6b

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update gcc-4.6
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Sun, 21 Aug 2011 07:07:55 +0900
parents
children b81903832de2 04ced10e8804
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equal deleted inserted replaced
67:f6334be47118 68:561a7518be6b
1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
11 version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
24
25 #include "splay-tree.h"
26 #include "cpplib.h"
27 #include "ggc.h"
28
29 /* In order for the format checking to accept the C frontend
30 diagnostic framework extensions, you must include this file before
31 diagnostic-core.h, not after. The C front end formats are a subset of those
32 for C++, so they are the appropriate set to use in common code;
33 cp-tree.h overrides this for C++. */
34 #if defined(GCC_DIAGNOSTIC_CORE_H)
35 #error \
36 In order for the format checking to accept the C front end diagnostic \
37 framework extensions, you must include this file before diagnostic-core.h \
38 never after.
39 #endif
40 #ifndef GCC_DIAG_STYLE
41 #define GCC_DIAG_STYLE __gcc_cdiag__
42 #endif
43 #include "diagnostic-core.h"
44
45 /* Usage of TREE_LANG_FLAG_?:
46 0: TREE_NEGATED_INT (in INTEGER_CST).
47 IDENTIFIER_MARKED (used by search routines).
48 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
49 C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
50 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
51 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
52 C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
53 2: unused
54 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
55 4: unused
56 */
57
58 /* Reserved identifiers. This is the union of all the keywords for C,
59 C++, and Objective-C. All the type modifiers have to be in one
60 block at the beginning, because they are used as mask bits. There
61 are 27 type modifiers; if we add many more we will have to redesign
62 the mask mechanism. */
63
64 enum rid
65 {
66 /* Modifiers: */
67 /* C, in empirical order of frequency. */
68 RID_STATIC = 0,
69 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
70 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
71 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
72
73 /* C extensions */
74 RID_COMPLEX, RID_THREAD, RID_SAT,
75
76 /* C++ */
77 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
78
79 /* ObjC ("PQ" reserved words - they do not appear after a '@' and
80 are keywords only in specific contexts) */
81 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
82
83 /* ObjC ("PATTR" reserved words - they do not appear after a '@'
84 and are keywords only as property attributes) */
85 RID_GETTER, RID_SETTER,
86 RID_READONLY, RID_READWRITE,
87 RID_ASSIGN, RID_RETAIN, RID_COPY,
88 RID_NONATOMIC,
89
90 /* C (reserved and imaginary types not implemented, so any use is a
91 syntax error) */
92 RID_IMAGINARY,
93
94 /* C */
95 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
96 RID_INT128,
97 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
98 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
99 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
100 RID_SIZEOF,
101
102 /* C extensions */
103 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
104 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
105 RID_TYPES_COMPATIBLE_P,
106 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
107 RID_FRACT, RID_ACCUM,
108
109 /* This means to warn that this is a C++ keyword, and then treat it
110 as a normal identifier. */
111 RID_CXX_COMPAT_WARN,
112
113 /* Too many ways of getting the name of a function as a string */
114 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
115
116 /* C++ (some of these are keywords in Objective-C as well, but only
117 if they appear after a '@') */
118 RID_BOOL, RID_WCHAR, RID_CLASS,
119 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
120 RID_TEMPLATE, RID_NULL, RID_CATCH,
121 RID_DELETE, RID_FALSE, RID_NAMESPACE,
122 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
123 RID_THIS, RID_THROW, RID_TRUE,
124 RID_TRY, RID_TYPENAME, RID_TYPEID,
125 RID_USING, RID_CHAR16, RID_CHAR32,
126
127 /* casts */
128 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
129
130 /* C++ extensions */
131 RID_HAS_NOTHROW_ASSIGN, RID_HAS_NOTHROW_CONSTRUCTOR,
132 RID_HAS_NOTHROW_COPY, RID_HAS_TRIVIAL_ASSIGN,
133 RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
134 RID_HAS_TRIVIAL_DESTRUCTOR, RID_HAS_VIRTUAL_DESTRUCTOR,
135 RID_IS_ABSTRACT, RID_IS_BASE_OF,
136 RID_IS_CONVERTIBLE_TO, RID_IS_CLASS,
137 RID_IS_EMPTY, RID_IS_ENUM,
138 RID_IS_POD, RID_IS_POLYMORPHIC,
139 RID_IS_STD_LAYOUT, RID_IS_TRIVIAL,
140 RID_IS_UNION, RID_IS_LITERAL_TYPE,
141
142 /* C++0x */
143 RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
144
145 /* Objective-C ("AT" reserved words - they are only keywords when
146 they follow '@') */
147 RID_AT_ENCODE, RID_AT_END,
148 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
149 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, RID_AT_PACKAGE,
150 RID_AT_PROTOCOL, RID_AT_SELECTOR,
151 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
152 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
153 RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
154 RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
155 RID_AT_INTERFACE,
156 RID_AT_IMPLEMENTATION,
157
158 /* Named address support, mapping the keyword to a particular named address
159 number. Named address space 0 is reserved for the generic address. If
160 there are more than 254 named addresses, the addr_space_t type will need
161 to be grown from an unsigned char to unsigned short. */
162 RID_ADDR_SPACE_0, /* generic address */
163 RID_ADDR_SPACE_1,
164 RID_ADDR_SPACE_2,
165 RID_ADDR_SPACE_3,
166 RID_ADDR_SPACE_4,
167 RID_ADDR_SPACE_5,
168 RID_ADDR_SPACE_6,
169 RID_ADDR_SPACE_7,
170 RID_ADDR_SPACE_8,
171 RID_ADDR_SPACE_9,
172 RID_ADDR_SPACE_10,
173 RID_ADDR_SPACE_11,
174 RID_ADDR_SPACE_12,
175 RID_ADDR_SPACE_13,
176 RID_ADDR_SPACE_14,
177 RID_ADDR_SPACE_15,
178
179 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
180 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
181
182 RID_MAX,
183
184 RID_FIRST_MODIFIER = RID_STATIC,
185 RID_LAST_MODIFIER = RID_ONEWAY,
186
187 RID_FIRST_CXX0X = RID_CONSTEXPR,
188 RID_LAST_CXX0X = RID_STATIC_ASSERT,
189 RID_FIRST_AT = RID_AT_ENCODE,
190 RID_LAST_AT = RID_AT_IMPLEMENTATION,
191 RID_FIRST_PQ = RID_IN,
192 RID_LAST_PQ = RID_ONEWAY,
193 RID_FIRST_PATTR = RID_GETTER,
194 RID_LAST_PATTR = RID_NONATOMIC
195 };
196
197 #define OBJC_IS_AT_KEYWORD(rid) \
198 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
199 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
200
201 #define OBJC_IS_PQ_KEYWORD(rid) \
202 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
203 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
204
205 #define OBJC_IS_PATTR_KEYWORD(rid) \
206 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
207 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
208
209 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
210 'class') which are shared in a subtle way between Objective-C and
211 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
212 finds '@' followed by one of these identifiers (eg, '@class'), it
213 recognizes the whole as an Objective-C keyword. If the identifier
214 is found elsewhere, it follows the rules of the C/C++ language.
215 */
216 #define OBJC_IS_CXX_KEYWORD(rid) \
217 (rid == RID_CLASS \
218 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
219 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
220
221 /* The elements of `ridpointers' are identifier nodes for the reserved
222 type names and storage classes. It is indexed by a RID_... value. */
223 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
224
225 /* Standard named or nameless data types of the C compiler. */
226
227 enum c_tree_index
228 {
229 CTI_CHAR16_TYPE,
230 CTI_CHAR32_TYPE,
231 CTI_WCHAR_TYPE,
232 CTI_UNDERLYING_WCHAR_TYPE,
233 CTI_WINT_TYPE,
234 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
235 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
236 CTI_INTMAX_TYPE,
237 CTI_UINTMAX_TYPE,
238 CTI_WIDEST_INT_LIT_TYPE,
239 CTI_WIDEST_UINT_LIT_TYPE,
240
241 /* Types for <stdint.h>, that may not be defined on all
242 targets. */
243 CTI_SIG_ATOMIC_TYPE,
244 CTI_INT8_TYPE,
245 CTI_INT16_TYPE,
246 CTI_INT32_TYPE,
247 CTI_INT64_TYPE,
248 CTI_UINT8_TYPE,
249 CTI_UINT16_TYPE,
250 CTI_UINT32_TYPE,
251 CTI_UINT64_TYPE,
252 CTI_INT_LEAST8_TYPE,
253 CTI_INT_LEAST16_TYPE,
254 CTI_INT_LEAST32_TYPE,
255 CTI_INT_LEAST64_TYPE,
256 CTI_UINT_LEAST8_TYPE,
257 CTI_UINT_LEAST16_TYPE,
258 CTI_UINT_LEAST32_TYPE,
259 CTI_UINT_LEAST64_TYPE,
260 CTI_INT_FAST8_TYPE,
261 CTI_INT_FAST16_TYPE,
262 CTI_INT_FAST32_TYPE,
263 CTI_INT_FAST64_TYPE,
264 CTI_UINT_FAST8_TYPE,
265 CTI_UINT_FAST16_TYPE,
266 CTI_UINT_FAST32_TYPE,
267 CTI_UINT_FAST64_TYPE,
268 CTI_INTPTR_TYPE,
269 CTI_UINTPTR_TYPE,
270
271 CTI_CHAR_ARRAY_TYPE,
272 CTI_CHAR16_ARRAY_TYPE,
273 CTI_CHAR32_ARRAY_TYPE,
274 CTI_WCHAR_ARRAY_TYPE,
275 CTI_INT_ARRAY_TYPE,
276 CTI_STRING_TYPE,
277 CTI_CONST_STRING_TYPE,
278
279 /* Type for boolean expressions (bool in C++, int in C). */
280 CTI_TRUTHVALUE_TYPE,
281 CTI_TRUTHVALUE_TRUE,
282 CTI_TRUTHVALUE_FALSE,
283
284 CTI_DEFAULT_FUNCTION_TYPE,
285
286 /* These are not types, but we have to look them up all the time. */
287 CTI_FUNCTION_NAME_DECL,
288 CTI_PRETTY_FUNCTION_NAME_DECL,
289 CTI_C99_FUNCTION_NAME_DECL,
290 CTI_SAVED_FUNCTION_NAME_DECLS,
291
292 CTI_VOID_ZERO,
293
294 CTI_NULL,
295
296 CTI_MAX
297 };
298
299 #define C_CPP_HASHNODE(id) \
300 (&(((struct c_common_identifier *) (id))->node))
301 #define C_RID_CODE(id) \
302 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
303 #define C_SET_RID_CODE(id, code) \
304 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
305
306 /* Identifier part common to the C front ends. Inherits from
307 tree_identifier, despite appearances. */
308 struct GTY(()) c_common_identifier {
309 struct tree_common common;
310 struct cpp_hashnode node;
311 };
312
313 /* An entry in the reserved keyword table. */
314
315 struct c_common_resword
316 {
317 const char *const word;
318 ENUM_BITFIELD(rid) const rid : 16;
319 const unsigned int disable : 16;
320 };
321
322 /* Disable mask. Keywords are disabled if (reswords[i].disable &
323 mask) is _true_. Thus for keywords which are present in all
324 languages the disable field is zero. */
325
326 #define D_CONLY 0x001 /* C only (not in C++). */
327 #define D_CXXONLY 0x002 /* C++ only (not in C). */
328 #define D_C99 0x004 /* In C, C99 only. */
329 #define D_CXX0X 0x008 /* In C++, C++0X only. */
330 #define D_EXT 0x010 /* GCC extension. */
331 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
332 #define D_ASM 0x040 /* Disabled by -fno-asm. */
333 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
334 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
335 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
336
337 /* The reserved keyword table. */
338 extern const struct c_common_resword c_common_reswords[];
339
340 /* The number of items in the reserved keyword table. */
341 extern const unsigned int num_c_common_reswords;
342
343 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
344 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
345 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
346 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
347 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
348 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
349 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
350 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
351 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
352 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
353 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
354
355 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
356 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
357 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
358 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
359 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
360 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
361 #define uint16_type_node c_global_trees[CTI_UINT16_TYPE]
362 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
363 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
364 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
365 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
366 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
367 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
368 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
369 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
370 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
371 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
372 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
373 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
374 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
375 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
376 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
377 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
378 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
379 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
380 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
381 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
382
383 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
384 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
385 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
386
387 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
388 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
389 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
390 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
391 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
392 #define string_type_node c_global_trees[CTI_STRING_TYPE]
393 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
394
395 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
396
397 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
398 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
399 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
400 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
401
402 /* A node for `((void) 0)'. */
403 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
404
405 /* The node for C++ `__null'. */
406 #define null_node c_global_trees[CTI_NULL]
407
408 extern GTY(()) tree c_global_trees[CTI_MAX];
409
410 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
411 tree for size reasons. */
412 struct GTY((variable_size)) sorted_fields_type {
413 int len;
414 tree GTY((length ("%h.len"))) elts[1];
415 };
416
417 /* Mark which labels are explicitly declared.
418 These may be shadowed, and may be referenced from nested functions. */
419 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
420
421 typedef enum c_language_kind
422 {
423 clk_c = 0, /* C90, C94 or C99 */
424 clk_objc = 1, /* clk_c with ObjC features. */
425 clk_cxx = 2, /* ANSI/ISO C++ */
426 clk_objcxx = 3 /* clk_cxx with ObjC features. */
427 }
428 c_language_kind;
429
430 /* To test for a specific language use c_language, defined by each
431 front end. For "ObjC features" or "not C++" use the macros. */
432 extern c_language_kind c_language;
433
434 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
435 #define c_dialect_objc() ((c_language & clk_objc) != 0)
436
437 /* The various name of operator that appears in error messages. */
438 typedef enum ref_operator {
439 /* NULL */
440 RO_NULL,
441 /* array indexing */
442 RO_ARRAY_INDEXING,
443 /* unary * */
444 RO_UNARY_STAR,
445 /* -> */
446 RO_ARROW,
447 /* implicit conversion */
448 RO_IMPLICIT_CONVERSION
449 } ref_operator;
450
451 /* Information about a statement tree. */
452
453 struct GTY(()) stmt_tree_s {
454 /* The current statement list being collected. */
455 tree x_cur_stmt_list;
456
457 /* In C++, Nonzero if we should treat statements as full
458 expressions. In particular, this variable is no-zero if at the
459 end of a statement we should destroy any temporaries created
460 during that statement. Similarly, if, at the end of a block, we
461 should destroy any local variables in this block. Normally, this
462 variable is nonzero, since those are the normal semantics of
463 C++.
464
465 However, in order to represent aggregate initialization code as
466 tree structure, we use statement-expressions. The statements
467 within the statement expression should not result in cleanups
468 being run until the entire enclosing statement is complete.
469
470 This flag has no effect in C. */
471 int stmts_are_full_exprs_p;
472 };
473
474 typedef struct stmt_tree_s *stmt_tree;
475
476 /* Global state pertinent to the current function. Some C dialects
477 extend this structure with additional fields. */
478
479 struct GTY(()) c_language_function {
480 /* While we are parsing the function, this contains information
481 about the statement-tree that we are building. */
482 struct stmt_tree_s x_stmt_tree;
483 };
484
485 /* When building a statement-tree, this is the current statement list
486 being collected. It's TREE_CHAIN is a back-pointer to the previous
487 statement list. */
488
489 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
490
491 /* Language-specific hooks. */
492
493 /* If non-NULL, this function is called after a precompile header file
494 is loaded. */
495 extern void (*lang_post_pch_load) (void);
496
497 extern void push_file_scope (void);
498 extern void pop_file_scope (void);
499 extern stmt_tree current_stmt_tree (void);
500 extern tree push_stmt_list (void);
501 extern tree pop_stmt_list (tree);
502 extern tree add_stmt (tree);
503 extern void push_cleanup (tree, tree, bool);
504 extern tree pushdecl_top_level (tree);
505 extern tree pushdecl (tree);
506 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
507 location_t, tree, tree);
508 extern tree build_indirect_ref (location_t, tree, ref_operator);
509
510 extern int c_expand_decl (tree);
511
512 extern int field_decl_cmp (const void *, const void *);
513 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
514 void *);
515 extern bool has_c_linkage (const_tree decl);
516
517 /* Switches common to the C front ends. */
518
519 /* Nonzero means don't output line number information. */
520
521 extern char flag_no_line_commands;
522
523 /* Nonzero causes -E output not to be done, but directives such as
524 #define that have side effects are still obeyed. */
525
526 extern char flag_no_output;
527
528 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
529 'N' or 'U' of the command line switch. */
530
531 extern char flag_dump_macros;
532
533 /* Nonzero means pass #include lines through to the output. */
534
535 extern char flag_dump_includes;
536
537 /* Nonzero means process PCH files while preprocessing. */
538
539 extern bool flag_pch_preprocess;
540
541 /* The file name to which we should write a precompiled header, or
542 NULL if no header will be written in this compile. */
543
544 extern const char *pch_file;
545
546 /* Nonzero if an ISO standard was selected. It rejects macros in the
547 user's namespace. */
548
549 extern int flag_iso;
550
551 /* Warn about #pragma directives that are not recognized. */
552
553 extern int warn_unknown_pragmas; /* Tri state variable. */
554
555 /* Warn about format/argument anomalies in calls to formatted I/O functions
556 (*printf, *scanf, strftime, strfmon, etc.). */
557
558 extern int warn_format;
559
560
561 /* C/ObjC language option variables. */
562
563
564 /* Nonzero means allow type mismatches in conditional expressions;
565 just make their values `void'. */
566
567 extern int flag_cond_mismatch;
568
569 /* Nonzero means enable C89 Amendment 1 features. */
570
571 extern int flag_isoc94;
572
573 /* Nonzero means use the ISO C99 (or C1X) dialect of C. */
574
575 extern int flag_isoc99;
576
577 /* Nonzero means use the ISO C1X dialect of C. */
578
579 extern int flag_isoc1x;
580
581 /* Nonzero means that we have builtin functions, and main is an int. */
582
583 extern int flag_hosted;
584
585 /* ObjC language option variables. */
586
587
588 /* Tells the compiler that this is a special run. Do not perform any
589 compiling, instead we are to test some platform dependent features
590 and output a C header file with appropriate definitions. */
591
592 extern int print_struct_values;
593
594 /* Tells the compiler what is the constant string class for ObjC. */
595
596 extern const char *constant_string_class_name;
597
598
599 /* C++ language option variables. */
600
601
602 /* Nonzero means generate separate instantiation control files and
603 juggle them at link time. */
604
605 extern int flag_use_repository;
606
607 /* The supported C++ dialects. */
608
609 enum cxx_dialect {
610 /* C++98 */
611 cxx98,
612 /* Experimental features that are likely to become part of
613 C++0x. */
614 cxx0x
615 };
616
617 /* The C++ dialect being used. C++98 is the default. */
618 extern enum cxx_dialect cxx_dialect;
619
620 /* Maximum template instantiation depth. This limit is rather
621 arbitrary, but it exists to limit the time it takes to notice
622 infinite template instantiations. */
623
624 extern int max_tinst_depth;
625
626 /* Nonzero means that we should not issue warnings about problems that
627 occur when the code is executed, because the code being processed
628 is not expected to be executed. This is set during parsing. This
629 is used for cases like sizeof() and "0 ? a : b". This is a count,
630 not a bool, because unexecuted expressions can nest. */
631
632 extern int c_inhibit_evaluation_warnings;
633
634 /* Whether lexing has been completed, so subsequent preprocessor
635 errors should use the compiler's input_location. */
636
637 extern bool done_lexing;
638
639 /* C types are partitioned into three subsets: object, function, and
640 incomplete types. */
641 #define C_TYPE_OBJECT_P(type) \
642 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
643
644 #define C_TYPE_INCOMPLETE_P(type) \
645 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
646
647 #define C_TYPE_FUNCTION_P(type) \
648 (TREE_CODE (type) == FUNCTION_TYPE)
649
650 /* For convenience we define a single macro to identify the class of
651 object or incomplete types. */
652 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
653 (!C_TYPE_FUNCTION_P (type))
654
655 struct visibility_flags
656 {
657 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
658 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
659 };
660
661 /* Global visibility options. */
662 extern struct visibility_flags visibility_options;
663
664 /* Attribute table common to the C front ends. */
665 extern const struct attribute_spec c_common_attribute_table[];
666 extern const struct attribute_spec c_common_format_attribute_table[];
667
668 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
669 ID is the identifier to use, NAME is the string.
670 TYPE_DEP indicates whether it depends on type of the function or not
671 (i.e. __PRETTY_FUNCTION__). */
672
673 extern tree (*make_fname_decl) (location_t, tree, int);
674
675 /* In c-decl.c and cp/tree.c. FIXME. */
676 extern void c_register_addr_space (const char *str, addr_space_t as);
677
678 /* In c-common.c. */
679 extern bool in_late_binary_op;
680 extern const char *c_addr_space_name (addr_space_t as);
681 extern tree identifier_global_value (tree);
682 extern void record_builtin_type (enum rid, const char *, tree);
683 extern tree build_void_list_node (void);
684 extern void start_fname_decls (void);
685 extern void finish_fname_decls (void);
686 extern const char *fname_as_string (int);
687 extern tree fname_decl (location_t, unsigned, tree);
688
689 extern void check_function_arguments (tree, int, tree *, tree);
690 extern void check_function_arguments_recurse (void (*)
691 (void *, tree,
692 unsigned HOST_WIDE_INT),
693 void *, tree,
694 unsigned HOST_WIDE_INT);
695 extern bool check_builtin_function_arguments (tree, int, tree *);
696 extern void check_function_format (tree, int, tree *);
697 extern void set_Wformat (int);
698 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
699 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
700 extern bool attribute_takes_identifier_p (const_tree);
701 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
702 const struct cl_option_handlers *);
703 extern tree c_common_type_for_mode (enum machine_mode, int);
704 extern tree c_common_type_for_size (unsigned int, int);
705 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
706 int, int);
707 extern tree c_common_unsigned_type (tree);
708 extern tree c_common_signed_type (tree);
709 extern tree c_common_signed_or_unsigned_type (int, tree);
710 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
711 extern bool decl_with_nonnull_addr_p (const_tree);
712 extern tree c_fully_fold (tree, bool, bool *);
713 extern tree decl_constant_value_for_optimization (tree);
714 extern tree c_wrap_maybe_const (tree, bool);
715 extern tree c_save_expr (tree);
716 extern tree c_common_truthvalue_conversion (location_t, tree);
717 extern void c_apply_type_quals_to_decl (int, tree);
718 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
719 extern tree c_alignof_expr (location_t, tree);
720 /* Print an error message for invalid operands to arith operation CODE.
721 NOP_EXPR is used as a special case (see truthvalue_conversion). */
722 extern void binary_op_error (location_t, enum tree_code, tree, tree);
723 extern tree fix_string_type (tree);
724 extern void constant_expression_warning (tree);
725 extern void constant_expression_error (tree);
726 extern bool strict_aliasing_warning (tree, tree, tree);
727 extern void warnings_for_convert_and_check (tree, tree, tree);
728 extern tree convert_and_check (tree, tree);
729 extern void overflow_warning (location_t, tree);
730 extern void warn_logical_operator (location_t, enum tree_code, tree,
731 enum tree_code, tree, enum tree_code, tree);
732 extern void check_main_parameter_types (tree decl);
733 extern bool c_determine_visibility (tree);
734 extern bool same_scalar_type_ignoring_signedness (tree, tree);
735 extern void mark_valid_location_for_stdc_pragma (bool);
736 extern bool valid_location_for_stdc_pragma_p (void);
737 extern void set_float_const_decimal64 (void);
738 extern void clear_float_const_decimal64 (void);
739 extern bool float_const_decimal64_p (void);
740
741 extern bool keyword_begins_type_specifier (enum rid);
742 extern bool keyword_is_storage_class_specifier (enum rid);
743 extern bool keyword_is_type_qualifier (enum rid);
744 extern bool keyword_is_decl_specifier (enum rid);
745
746 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, 1)
747 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
748
749 /* Subroutine of build_binary_op, used for certain operations. */
750 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
751
752 /* Subroutine of build_binary_op, used for comparison operations.
753 See if the operands have both been converted from subword integer types
754 and, if so, perhaps change them both back to their original type. */
755 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
756
757 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
758
759 /* Add qualifiers to a type, in the fashion for C. */
760 extern tree c_build_qualified_type (tree, int);
761
762 /* Build tree nodes and builtin functions common to both C and C++ language
763 frontends. */
764 extern void c_common_nodes_and_builtins (void);
765
766 extern void disable_builtin_function (const char *);
767
768 extern void set_compound_literal_name (tree decl);
769
770 extern tree build_va_arg (location_t, tree, tree);
771
772 extern const unsigned int c_family_lang_mask;
773 extern unsigned int c_common_option_lang_mask (void);
774 extern void c_common_initialize_diagnostics (diagnostic_context *);
775 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
776 extern void c_common_init_options_struct (struct gcc_options *);
777 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
778 extern bool c_common_post_options (const char **);
779 extern bool c_common_init (void);
780 extern void c_common_finish (void);
781 extern void c_common_parse_file (void);
782 extern alias_set_type c_common_get_alias_set (tree);
783 extern void c_register_builtin_type (tree, const char*);
784 extern bool c_promoting_integer_type_p (const_tree);
785 extern int self_promoting_args_p (const_tree);
786 extern tree strip_pointer_operator (tree);
787 extern tree strip_pointer_or_array_types (tree);
788 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
789
790 /* This is the basic parsing function. */
791 extern void c_parse_file (void);
792
793 extern void warn_for_omitted_condop (location_t, tree);
794
795 /* These macros provide convenient access to the various _STMT nodes. */
796
797 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
798 if a statement expression. */
799 #define STATEMENT_LIST_STMT_EXPR(NODE) \
800 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
801
802 /* Nonzero if a label has been added to the statement list. */
803 #define STATEMENT_LIST_HAS_LABEL(NODE) \
804 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
805
806 /* C_MAYBE_CONST_EXPR accessors. */
807 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
808 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
809 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
810 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
811 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
812 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
813 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
814 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
815 #define EXPR_INT_CONST_OPERANDS(EXPR) \
816 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
817 && (TREE_CODE (EXPR) == INTEGER_CST \
818 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
819 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
820
821 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
822 #define DECL_C_BIT_FIELD(NODE) \
823 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
824 #define SET_DECL_C_BIT_FIELD(NODE) \
825 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
826 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
827 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
828
829 extern tree do_case (location_t, tree, tree);
830 extern tree build_stmt (location_t, enum tree_code, ...);
831 extern tree build_case_label (location_t, tree, tree, tree);
832 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
833
834 /* These functions must be defined by each front-end which implements
835 a variant of the C language. They are used in c-common.c. */
836
837 extern tree build_unary_op (location_t, enum tree_code, tree, int);
838 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
839 extern tree perform_integral_promotions (tree);
840
841 /* These functions must be defined by each front-end which implements
842 a variant of the C language. They are used by port files. */
843
844 extern tree default_conversion (tree);
845
846 /* Given two integer or real types, return the type for their sum.
847 Given two compatible ANSI C types, returns the merged type. */
848
849 extern tree common_type (tree, tree);
850
851 extern tree decl_constant_value (tree);
852
853 /* Handle increment and decrement of boolean types. */
854 extern tree boolean_increment (enum tree_code, tree);
855
856 extern int case_compare (splay_tree_key, splay_tree_key);
857
858 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
859
860 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
861
862 extern tree build_function_call (location_t, tree, tree);
863
864 extern tree build_function_call_vec (location_t, tree,
865 VEC(tree,gc) *, VEC(tree,gc) *);
866
867 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
868
869 extern tree finish_label_address_expr (tree, location_t);
870
871 /* Same function prototype, but the C and C++ front ends have
872 different implementations. Used in c-common.c. */
873 extern tree lookup_label (tree);
874 extern tree lookup_name (tree);
875 extern bool lvalue_p (const_tree);
876
877 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
878 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
879
880 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
881
882 extern void init_c_lex (void);
883
884 extern void c_cpp_builtins (cpp_reader *);
885 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
886 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
887 const char *, va_list *)
888 ATTRIBUTE_GCC_DIAG(6,0);
889
890 extern bool parse_optimize_options (tree, bool);
891
892 /* Positive if an implicit `extern "C"' scope has just been entered;
893 negative if such a scope has just been exited. */
894 extern GTY(()) int pending_lang_change;
895
896 /* Information recorded about each file examined during compilation. */
897
898 struct c_fileinfo
899 {
900 int time; /* Time spent in the file. */
901
902 /* Flags used only by C++.
903 INTERFACE_ONLY nonzero means that we are in an "interface" section
904 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
905 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
906 INTERFACE_ONLY is zero, it means that we are responsible for
907 exporting definitions that others might need. */
908 short interface_only;
909 short interface_unknown;
910 };
911
912 struct c_fileinfo *get_fileinfo (const char *);
913 extern void dump_time_statistics (void);
914
915 extern bool c_dump_tree (void *, tree);
916
917 extern void verify_sequence_points (tree);
918
919 extern tree fold_offsetof (tree, tree);
920
921 /* Places where an lvalue, or modifiable lvalue, may be required.
922 Used to select diagnostic messages in lvalue_error and
923 readonly_error. */
924 enum lvalue_use {
925 lv_assign,
926 lv_increment,
927 lv_decrement,
928 lv_addressof,
929 lv_asm
930 };
931
932 extern void readonly_error (tree, enum lvalue_use);
933 extern void lvalue_error (location_t, enum lvalue_use);
934 extern void invalid_indirection_error (location_t, tree, ref_operator);
935
936 extern int complete_array_type (tree *, tree, bool);
937
938 extern tree builtin_type_for_size (int, bool);
939
940 extern void c_common_mark_addressable_vec (tree);
941
942 extern void warn_array_subscript_with_type_char (tree);
943 extern void warn_about_parentheses (enum tree_code,
944 enum tree_code, tree,
945 enum tree_code, tree);
946 extern void warn_for_unused_label (tree label);
947 extern void warn_for_div_by_zero (location_t, tree divisor);
948 extern void warn_for_sign_compare (location_t,
949 tree orig_op0, tree orig_op1,
950 tree op0, tree op1,
951 tree result_type,
952 enum tree_code resultcode);
953 extern void do_warn_double_promotion (tree, tree, tree, const char *,
954 location_t);
955 extern void set_underlying_type (tree x);
956 extern VEC(tree,gc) *make_tree_vector (void);
957 extern void release_tree_vector (VEC(tree,gc) *);
958 extern VEC(tree,gc) *make_tree_vector_single (tree);
959 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
960
961 /* In c-gimplify.c */
962 extern void c_genericize (tree);
963 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
964 extern tree c_build_bind_expr (location_t, tree, tree);
965
966 /* In c-pch.c */
967 extern void pch_init (void);
968 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
969 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
970 const char *orig);
971 extern void c_common_write_pch (void);
972 extern void c_common_no_more_pch (void);
973 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
974 extern void c_common_print_pch_checksum (FILE *f);
975
976 /* In *-checksum.c */
977 extern const unsigned char executable_checksum[16];
978
979 /* In c-cppbuiltin.c */
980 extern void builtin_define_std (const char *macro);
981 extern void builtin_define_with_value (const char *, const char *, int);
982 extern void c_stddef_cpp_builtins (void);
983 extern void fe_file_change (const struct line_map *);
984 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
985
986 /* In c-ppoutput.c */
987 extern void init_pp_output (FILE *);
988 extern void preprocess_file (cpp_reader *);
989 extern void pp_file_change (const struct line_map *);
990 extern void pp_dir_change (cpp_reader *, const char *);
991 extern bool check_missing_format_attribute (tree, tree);
992
993 /* In c-omp.c */
994 extern tree c_finish_omp_master (location_t, tree);
995 extern tree c_finish_omp_critical (location_t, tree, tree);
996 extern tree c_finish_omp_ordered (location_t, tree);
997 extern void c_finish_omp_barrier (location_t);
998 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
999 extern void c_finish_omp_flush (location_t);
1000 extern void c_finish_omp_taskwait (location_t);
1001 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1002 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1003 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1004
1005 /* Not in c-omp.c; provided by the front end. */
1006 extern bool c_omp_sharing_predetermined (tree);
1007 extern tree c_omp_remap_decl (tree, bool);
1008 extern void record_types_used_by_current_var_decl (tree);
1009
1010 #endif /* ! GCC_C_COMMON_H */