1 /* Definitions for c-common.c.
2 Copyright (C) 1987-2021 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20 #ifndef GCC_C_COMMON_H
21 #define GCC_C_COMMON_H
22
23 #include "splay-tree.h"
24 #include "cpplib.h"
25 #include "alias.h"
26 #include "tree.h"
27 #include "fold-const.h"
28 #include "wide-int-bitmask.h"
29
30 /* In order for the format checking to accept the C frontend
31 diagnostic framework extensions, you must include this file before
32 diagnostic-core.h, not after. The C front end formats are a subset of those
33 for C++, so they are the appropriate set to use in common code;
34 cp-tree.h overrides this for C++. */
35 #if defined(GCC_DIAGNOSTIC_CORE_H)
36 #error \
37 In order for the format checking to accept the C front end diagnostic \
38 framework extensions, you must include this file before diagnostic-core.h \
39 never after.
40 #endif
41 #ifndef GCC_DIAG_STYLE
42 #define GCC_DIAG_STYLE __gcc_cdiag__
43 #endif
44 #include "diagnostic-core.h"
45
46 /* Usage of TREE_LANG_FLAG_?:
47 0: IDENTIFIER_MARKED (used by search routines).
48 C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
49 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
50 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
51 C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
52 2: unused
53 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
54 4: unused
55 */
56
57 /* Reserved identifiers. This is the union of all the keywords for C,
58 C++, and Objective-C. All the type modifiers have to be in one
59 block at the beginning, because they are used as mask bits. There
60 are 28 type modifiers; if we add many more we will have to redesign
61 the mask mechanism. */
62
63 enum rid
64 {
65 /* Modifiers: */
66 /* C, in empirical order of frequency. */
67 RID_STATIC = 0,
68 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
69 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
70 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
71 RID_NORETURN, RID_ATOMIC,
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_PROPATOMIC, RID_NONATOMIC,
89
90 /* ObjC nullability support keywords that also can appear in the
91 property attribute context. These values should remain contiguous
92 with the other property attributes. */
93 RID_NULL_UNSPECIFIED, RID_NULLABLE, RID_NONNULL, RID_NULL_RESETTABLE,
94
95 /* C (reserved and imaginary types not implemented, so any use is a
96 syntax error) */
97 RID_IMAGINARY,
98
99 /* C */
100 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
101 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
102 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
103 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
104 RID_SIZEOF,
105
106 /* C extensions */
107 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
108 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
109 RID_TYPES_COMPATIBLE_P, RID_BUILTIN_COMPLEX, RID_BUILTIN_SHUFFLE,
110 RID_BUILTIN_CONVERTVECTOR, RID_BUILTIN_TGMATH,
111 RID_BUILTIN_HAS_ATTRIBUTE,
112 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
113
114 /* TS 18661-3 keywords, in the same sequence as the TI_* values. */
115 RID_FLOAT16,
116 RID_FLOATN_NX_FIRST = RID_FLOAT16,
117 RID_FLOAT32,
118 RID_FLOAT64,
119 RID_FLOAT128,
120 RID_FLOAT32X,
121 RID_FLOAT64X,
122 RID_FLOAT128X,
123 #define CASE_RID_FLOATN_NX \
124 case RID_FLOAT16: case RID_FLOAT32: case RID_FLOAT64: case RID_FLOAT128: \
125 case RID_FLOAT32X: case RID_FLOAT64X: case RID_FLOAT128X
126
127 RID_FRACT, RID_ACCUM, RID_AUTO_TYPE, RID_BUILTIN_CALL_WITH_STATIC_CHAIN,
128
129 /* "__GIMPLE", for the GIMPLE-parsing extension to the C frontend. */
130 RID_GIMPLE,
131
132 /* "__PHI", for parsing PHI function in GIMPLE FE. */
133 RID_PHI,
134
135 /* "__RTL", for the RTL-parsing extension to the C frontend. */
136 RID_RTL,
137
138 /* C11 */
139 RID_ALIGNAS, RID_GENERIC,
140
141 /* This means to warn that this is a C++ keyword, and then treat it
142 as a normal identifier. */
143 RID_CXX_COMPAT_WARN,
144
145 /* GNU transactional memory extension */
146 RID_TRANSACTION_ATOMIC, RID_TRANSACTION_RELAXED, RID_TRANSACTION_CANCEL,
147
148 /* Too many ways of getting the name of a function as a string */
149 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
150
151 /* C++ (some of these are keywords in Objective-C as well, but only
152 if they appear after a '@') */
153 RID_BOOL, RID_WCHAR, RID_CLASS,
154 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
155 RID_TEMPLATE, RID_NULL, RID_CATCH,
156 RID_DELETE, RID_FALSE, RID_NAMESPACE,
157 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
158 RID_THIS, RID_THROW, RID_TRUE,
159 RID_TRY, RID_TYPENAME, RID_TYPEID,
160 RID_USING, RID_CHAR16, RID_CHAR32,
161
162 /* casts */
163 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
164
165 /* C++ extensions */
166 RID_ADDRESSOF, RID_BASES,
167 RID_BUILTIN_LAUNDER, RID_DIRECT_BASES,
168 RID_HAS_NOTHROW_ASSIGN, RID_HAS_NOTHROW_CONSTRUCTOR,
169 RID_HAS_NOTHROW_COPY, RID_HAS_TRIVIAL_ASSIGN,
170 RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
171 RID_HAS_TRIVIAL_DESTRUCTOR, RID_HAS_UNIQUE_OBJ_REPRESENTATIONS,
172 RID_HAS_VIRTUAL_DESTRUCTOR, RID_BUILTIN_BIT_CAST,
173 RID_IS_ABSTRACT, RID_IS_AGGREGATE,
174 RID_IS_BASE_OF, RID_IS_CLASS,
175 RID_IS_EMPTY, RID_IS_ENUM,
176 RID_IS_FINAL, RID_IS_LITERAL_TYPE,
177 RID_IS_POD, RID_IS_POLYMORPHIC,
178 RID_IS_SAME_AS,
179 RID_IS_STD_LAYOUT, RID_IS_TRIVIAL,
180 RID_IS_TRIVIALLY_ASSIGNABLE, RID_IS_TRIVIALLY_CONSTRUCTIBLE,
181 RID_IS_TRIVIALLY_COPYABLE,
182 RID_IS_UNION, RID_UNDERLYING_TYPE,
183 RID_IS_ASSIGNABLE, RID_IS_CONSTRUCTIBLE,
184 RID_IS_NOTHROW_ASSIGNABLE, RID_IS_NOTHROW_CONSTRUCTIBLE,
185
186 /* C++11 */
187 RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
188
189 /* C++20 */
190 RID_CONSTINIT, RID_CONSTEVAL,
191
192 /* char8_t */
193 RID_CHAR8,
194
195 /* C++ concepts */
196 RID_CONCEPT, RID_REQUIRES,
197
198 /* C++ modules. */
199 RID__MODULE, RID__IMPORT, RID__EXPORT, /* Internal tokens. */
200
201 /* C++ coroutines */
202 RID_CO_AWAIT, RID_CO_YIELD, RID_CO_RETURN,
203
204 /* C++ transactional memory. */
205 RID_ATOMIC_NOEXCEPT, RID_ATOMIC_CANCEL, RID_SYNCHRONIZED,
206
207 /* Objective-C ("AT" reserved words - they are only keywords when
208 they follow '@') */
209 RID_AT_ENCODE, RID_AT_END,
210 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
211 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, RID_AT_PACKAGE,
212 RID_AT_PROTOCOL, RID_AT_SELECTOR,
213 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
214 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
215 RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
216 RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
217 RID_AT_INTERFACE,
218 RID_AT_IMPLEMENTATION,
219
220 /* Named address support, mapping the keyword to a particular named address
221 number. Named address space 0 is reserved for the generic address. If
222 there are more than 254 named addresses, the addr_space_t type will need
223 to be grown from an unsigned char to unsigned short. */
224 RID_ADDR_SPACE_0, /* generic address */
225 RID_ADDR_SPACE_1,
226 RID_ADDR_SPACE_2,
227 RID_ADDR_SPACE_3,
228 RID_ADDR_SPACE_4,
229 RID_ADDR_SPACE_5,
230 RID_ADDR_SPACE_6,
231 RID_ADDR_SPACE_7,
232 RID_ADDR_SPACE_8,
233 RID_ADDR_SPACE_9,
234 RID_ADDR_SPACE_10,
235 RID_ADDR_SPACE_11,
236 RID_ADDR_SPACE_12,
237 RID_ADDR_SPACE_13,
238 RID_ADDR_SPACE_14,
239 RID_ADDR_SPACE_15,
240
241 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
242 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
243
244 /* __intN keywords. The _N_M here doesn't correspond to the intN
245 in the keyword; use the bitsize in int_n_t_data_t[M] for that.
246 For example, if int_n_t_data_t[0].bitsize is 13, then RID_INT_N_0
247 is for __int13. */
248
249 /* Note that the range to use is RID_FIRST_INT_N through
250 RID_FIRST_INT_N + NUM_INT_N_ENTS - 1 and c-parser.c has a list of
251 all RID_INT_N_* in a case statement. */
252
253 RID_INT_N_0,
254 RID_INT_N_1,
255 RID_INT_N_2,
256 RID_INT_N_3,
257
258 RID_FIRST_INT_N = RID_INT_N_0,
259 RID_LAST_INT_N = RID_INT_N_3,
260
261 RID_MAX,
262
263 RID_FIRST_MODIFIER = RID_STATIC,
264 RID_LAST_MODIFIER = RID_ONEWAY,
265
266 RID_FIRST_CXX11 = RID_CONSTEXPR,
267 RID_LAST_CXX11 = RID_STATIC_ASSERT,
268 RID_FIRST_CXX20 = RID_CONSTINIT,
269 RID_LAST_CXX20 = RID_CONSTINIT,
270 RID_FIRST_AT = RID_AT_ENCODE,
271 RID_LAST_AT = RID_AT_IMPLEMENTATION,
272 RID_FIRST_PQ = RID_IN,
273 RID_LAST_PQ = RID_ONEWAY,
274 RID_FIRST_PATTR = RID_GETTER,
275 RID_LAST_PATTR = RID_NULL_RESETTABLE
276 };
277
278 #define OBJC_IS_AT_KEYWORD(rid) \
279 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
280 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
281
282 #define OBJC_IS_PQ_KEYWORD(rid) \
283 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
284 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
285
286 /* Keywords permitted in an @property attribute context. */
287 #define OBJC_IS_PATTR_KEYWORD(rid) \
288 ((((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
289 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)) \
290 || rid == RID_CLASS)
291
292 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
293 'class') which are shared in a subtle way between Objective-C and
294 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
295 finds '@' followed by one of these identifiers (eg, '@class'), it
296 recognizes the whole as an Objective-C keyword. If the identifier
297 is found elsewhere, it follows the rules of the C/C++ language.
298 */
299 #define OBJC_IS_CXX_KEYWORD(rid) \
300 (rid == RID_CLASS || rid == RID_SYNCHRONIZED \
301 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
302 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
303
304 /* The elements of `ridpointers' are identifier nodes for the reserved
305 type names and storage classes. It is indexed by a RID_... value. */
306 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
307
308 /* Standard named or nameless data types of the C compiler. */
309
310 enum c_tree_index
311 {
312 CTI_CHAR8_TYPE,
313 CTI_CHAR16_TYPE,
314 CTI_CHAR32_TYPE,
315 CTI_WCHAR_TYPE,
316 CTI_UNDERLYING_WCHAR_TYPE,
317 CTI_WINT_TYPE,
318 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
319 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
320 CTI_INTMAX_TYPE,
321 CTI_UINTMAX_TYPE,
322 CTI_WIDEST_INT_LIT_TYPE,
323 CTI_WIDEST_UINT_LIT_TYPE,
324
325 /* Types for <stdint.h>, that may not be defined on all
326 targets. */
327 CTI_SIG_ATOMIC_TYPE,
328 CTI_INT8_TYPE,
329 CTI_INT16_TYPE,
330 CTI_INT32_TYPE,
331 CTI_INT64_TYPE,
332 CTI_UINT8_TYPE,
333 CTI_UINT16_TYPE,
334 CTI_UINT32_TYPE,
335 CTI_UINT64_TYPE,
336 CTI_INT_LEAST8_TYPE,
337 CTI_INT_LEAST16_TYPE,
338 CTI_INT_LEAST32_TYPE,
339 CTI_INT_LEAST64_TYPE,
340 CTI_UINT_LEAST8_TYPE,
341 CTI_UINT_LEAST16_TYPE,
342 CTI_UINT_LEAST32_TYPE,
343 CTI_UINT_LEAST64_TYPE,
344 CTI_INT_FAST8_TYPE,
345 CTI_INT_FAST16_TYPE,
346 CTI_INT_FAST32_TYPE,
347 CTI_INT_FAST64_TYPE,
348 CTI_UINT_FAST8_TYPE,
349 CTI_UINT_FAST16_TYPE,
350 CTI_UINT_FAST32_TYPE,
351 CTI_UINT_FAST64_TYPE,
352 CTI_INTPTR_TYPE,
353 CTI_UINTPTR_TYPE,
354
355 CTI_CHAR_ARRAY_TYPE,
356 CTI_CHAR8_ARRAY_TYPE,
357 CTI_CHAR16_ARRAY_TYPE,
358 CTI_CHAR32_ARRAY_TYPE,
359 CTI_WCHAR_ARRAY_TYPE,
360 CTI_STRING_TYPE,
361 CTI_CONST_STRING_TYPE,
362
363 /* Type for boolean expressions (bool in C++, int in C). */
364 CTI_TRUTHVALUE_TYPE,
365 CTI_TRUTHVALUE_TRUE,
366 CTI_TRUTHVALUE_FALSE,
367
368 CTI_DEFAULT_FUNCTION_TYPE,
369
370 CTI_NULL,
371
372 /* These are not types, but we have to look them up all the time. */
373 CTI_FUNCTION_NAME_DECL,
374 CTI_PRETTY_FUNCTION_NAME_DECL,
375 CTI_C99_FUNCTION_NAME_DECL,
376
377 CTI_MODULE_HWM,
378 /* Below here entities change during compilation. */
379
380 CTI_SAVED_FUNCTION_NAME_DECLS,
381
382 CTI_MAX
383 };
384
385 #define C_CPP_HASHNODE(id) \
386 (&(((struct c_common_identifier *) (id))->node))
387 #define C_RID_CODE(id) \
388 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
389 #define C_SET_RID_CODE(id, code) \
390 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
391
392 /* Identifier part common to the C front ends. Inherits from
393 tree_identifier, despite appearances. */
394 struct GTY(()) c_common_identifier {
395 struct tree_common common;
396 struct cpp_hashnode node;
397 };
398
399 /* An entry in the reserved keyword table. */
400
401 struct c_common_resword
402 {
403 const char *const word;
404 ENUM_BITFIELD(rid) const rid : 16;
405 const unsigned int disable : 16;
406 };
407
408 /* Mode used to build pointers (VOIDmode means ptr_mode). */
409
410 extern machine_mode c_default_pointer_mode;
411
412 /* Extra cpp_ttype values for C++. */
413
414 /* A token type for template-ids. If a template-id is processed while
415 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
416 the value of the CPP_TEMPLATE_ID is whatever was returned by
417 cp_parser_template_id. */
418 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
419
420 /* A token type for nested-name-specifiers. If a
421 nested-name-specifier is processed while parsing tentatively, it is
422 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
423 CPP_NESTED_NAME_SPECIFIER is whatever was returned by
424 cp_parser_nested_name_specifier_opt. */
425 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
426
427 /* A token type for pre-parsed C++0x decltype. */
428 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
429
430 /* A token type for pre-parsed primary-expression (lambda- or statement-). */
431 #define CPP_PREPARSED_EXPR ((enum cpp_ttype) (CPP_DECLTYPE + 1))
432
433 /* The number of token types, including C++-specific ones. */
434 #define N_CP_TTYPES ((int) (CPP_PREPARSED_EXPR + 1))
435
436 /* Disable mask. Keywords are disabled if (reswords[i].disable &
437 mask) is _true_. Thus for keywords which are present in all
438 languages the disable field is zero. */
439
440 #define D_CONLY 0x0001 /* C only (not in C++). */
441 #define D_CXXONLY 0x0002 /* C++ only (not in C). */
442 #define D_C99 0x0004 /* In C, C99 only. */
443 #define D_CXX11 0x0008 /* In C++, C++11 only. */
444 #define D_EXT 0x0010 /* GCC extension. */
445 #define D_EXT89 0x0020 /* GCC extension incorporated in C99. */
446 #define D_ASM 0x0040 /* Disabled by -fno-asm. */
447 #define D_OBJC 0x0080 /* In Objective C and neither C nor C++. */
448 #define D_CXX_OBJC 0x0100 /* In Objective C, and C++, but not C. */
449 #define D_CXXWARN 0x0200 /* In C warn with -Wcxx-compat. */
450 #define D_CXX_CONCEPTS 0x0400 /* In C++, only with concepts. */
451 #define D_TRANSMEM 0X0800 /* C++ transactional memory TS. */
452 #define D_CXX_CHAR8_T 0X1000 /* In C++, only with -fchar8_t. */
453 #define D_CXX20 0x2000 /* In C++, C++20 only. */
454 #define D_CXX_COROUTINES 0x4000 /* In C++, only with coroutines. */
455 #define D_CXX_MODULES 0x8000 /* In C++, only with modules. */
456
457 #define D_CXX_CONCEPTS_FLAGS D_CXXONLY | D_CXX_CONCEPTS
458 #define D_CXX_CHAR8_T_FLAGS D_CXXONLY | D_CXX_CHAR8_T
459 #define D_CXX_MODULES_FLAGS (D_CXXONLY | D_CXX_MODULES)
460 #define D_CXX_COROUTINES_FLAGS (D_CXXONLY | D_CXX_COROUTINES)
461
462 /* The reserved keyword table. */
463 extern const struct c_common_resword c_common_reswords[];
464
465 /* The number of items in the reserved keyword table. */
466 extern const unsigned int num_c_common_reswords;
467
468 #define char8_type_node c_global_trees[CTI_CHAR8_TYPE]
469 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
470 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
471 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
472 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
473 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
474 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
475 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
476 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
477 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
478 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
479 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
480
481 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
482 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
483 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
484 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
485 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
486 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
487 #define c_uint16_type_node c_global_trees[CTI_UINT16_TYPE]
488 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
489 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
490 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
491 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
492 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
493 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
494 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
495 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
496 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
497 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
498 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
499 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
500 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
501 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
502 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
503 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
504 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
505 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
506 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
507 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
508
509 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
510 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
511 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
512
513 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
514 #define char8_array_type_node c_global_trees[CTI_CHAR8_ARRAY_TYPE]
515 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
516 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
517 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
518 #define string_type_node c_global_trees[CTI_STRING_TYPE]
519 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
520
521 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
522
523 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
524 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
525 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
526 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
527
528 /* The node for C++ `__null'. */
529 #define null_node c_global_trees[CTI_NULL]
530
531 extern GTY(()) tree c_global_trees[CTI_MAX];
532
533 /* Mark which labels are explicitly declared.
534 These may be shadowed, and may be referenced from nested functions. */
535 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
536
537 enum c_language_kind
538 {
539 clk_c = 0, /* C90, C94, C99, C11 or C2X */
540 clk_objc = 1, /* clk_c with ObjC features. */
541 clk_cxx = 2, /* ANSI/ISO C++ */
542 clk_objcxx = 3 /* clk_cxx with ObjC features. */
543 };
544
545 /* To test for a specific language use c_language, defined by each
546 front end. For "ObjC features" or "not C++" use the macros. */
547 extern c_language_kind c_language;
548
549 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
550 #define c_dialect_objc() ((c_language & clk_objc) != 0)
551
552 /* The various name of operator that appears in error messages. */
553 enum ref_operator {
554 /* NULL */
555 RO_NULL,
556 /* array indexing */
557 RO_ARRAY_INDEXING,
558 /* unary * */
559 RO_UNARY_STAR,
560 /* -> */
561 RO_ARROW,
562 /* implicit conversion */
563 RO_IMPLICIT_CONVERSION,
564 /* ->* */
565 RO_ARROW_STAR
566 };
567
568 /* Information about a statement tree. */
569
570 struct GTY(()) stmt_tree_s {
571 /* A stack of statement lists being collected. */
572 vec<tree, va_gc> *x_cur_stmt_list;
573
574 /* In C++, Nonzero if we should treat statements as full
575 expressions. In particular, this variable is non-zero if at the
576 end of a statement we should destroy any temporaries created
577 during that statement. Similarly, if, at the end of a block, we
578 should destroy any local variables in this block. Normally, this
579 variable is nonzero, since those are the normal semantics of
580 C++.
581
582 This flag has no effect in C. */
583 int stmts_are_full_exprs_p;
584 };
585
586 typedef struct stmt_tree_s *stmt_tree;
587
588 /* Global state pertinent to the current function. Some C dialects
589 extend this structure with additional fields. */
590
591 struct GTY(()) c_language_function {
592 /* While we are parsing the function, this contains information
593 about the statement-tree that we are building. */
594 struct stmt_tree_s x_stmt_tree;
595
596 /* Vector of locally defined typedefs, for
597 -Wunused-local-typedefs. */
598 vec<tree, va_gc> *local_typedefs;
599 };
600
601 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
602
603 /* When building a statement-tree, this is the current statement list
604 being collected. */
605 #define cur_stmt_list (stmt_list_stack->last ())
606
607 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
608
609 /* Language-specific hooks. */
610
611 /* If non-NULL, this function is called after a precompile header file
612 is loaded. */
613 extern void (*lang_post_pch_load) (void);
614
615 extern void push_file_scope (void);
616 extern void pop_file_scope (void);
617 extern stmt_tree current_stmt_tree (void);
618 extern tree push_stmt_list (void);
619 extern tree pop_stmt_list (tree);
620 extern tree add_stmt (tree);
621 extern void push_cleanup (tree, tree, bool);
622
623 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
624 location_t, tree, tree);
625 extern tree build_indirect_ref (location_t, tree, ref_operator);
626
627 extern bool has_c_linkage (const_tree decl);
628 extern bool c_decl_implicit (const_tree);
629
630 /* Switches common to the C front ends. */
631
632 /* Nonzero means don't output line number information. */
633
634 extern char flag_no_line_commands;
635
636 /* Nonzero causes -E output not to be done, but directives such as
637 #define that have side effects are still obeyed. */
638
639 extern char flag_no_output;
640
641 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
642 'N' or 'U' of the command line switch. */
643
644 extern char flag_dump_macros;
645
646 /* Nonzero means pass #include lines through to the output. */
647
648 extern char flag_dump_includes;
649
650 /* Nonzero means process PCH files while preprocessing. */
651
652 extern bool flag_pch_preprocess;
653
654 /* The file name to which we should write a precompiled header, or
655 NULL if no header will be written in this compile. */
656
657 extern const char *pch_file;
658
659 /* Nonzero if an ISO standard was selected. It rejects macros in the
660 user's namespace. */
661
662 extern int flag_iso;
663
664 /* C/ObjC language option variables. */
665
666
667 /* Nonzero means allow type mismatches in conditional expressions;
668 just make their values `void'. */
669
670 extern int flag_cond_mismatch;
671
672 /* Nonzero means enable C89 Amendment 1 features. */
673
674 extern int flag_isoc94;
675
676 /* Nonzero means use the ISO C99 (or later) dialect of C. */
677
678 extern int flag_isoc99;
679
680 /* Nonzero means use the ISO C11 (or later) dialect of C. */
681
682 extern int flag_isoc11;
683
684 /* Nonzero means use the ISO C2X dialect of C. */
685
686 extern int flag_isoc2x;
687
688 /* Nonzero means that we have builtin functions, and main is an int. */
689
690 extern int flag_hosted;
691
692 /* ObjC language option variables. */
693
694
695 /* Tells the compiler that this is a special run. Do not perform any
696 compiling, instead we are to test some platform dependent features
697 and output a C header file with appropriate definitions. */
698
699 extern int print_struct_values;
700
701 /* Tells the compiler what is the constant string class for ObjC. */
702
703 extern const char *constant_string_class_name;
704
705
706 /* C++ language option variables. */
707
708 /* The reference version of the ABI for -Wabi. */
709
710 extern int warn_abi_version;
711
712 /* Return TRUE if one of {flag_abi_version,flag_abi_compat_version} is
713 less than N and the other is at least N. */
714 #define abi_compat_version_crosses(N) \
715 (abi_version_at_least(N) \
716 != (flag_abi_compat_version == 0 \
717 || flag_abi_compat_version >= (N)))
718
719 /* Return TRUE if one of {flag_abi_version,warn_abi_version} is
720 less than N and the other is at least N, for use by -Wabi. */
721 #define abi_version_crosses(N) \
722 (abi_version_at_least(N) \
723 != (warn_abi_version == 0 \
724 || warn_abi_version >= (N)))
725
726 /* The supported C++ dialects. */
727
728 enum cxx_dialect {
729 cxx_unset,
730 /* C++98 with TC1 */
731 cxx98,
732 cxx03 = cxx98,
733 /* C++11 */
734 cxx0x,
735 cxx11 = cxx0x,
736 /* C++14 */
737 cxx14,
738 /* C++17 */
739 cxx17,
740 /* C++20 */
741 cxx20,
742 /* C++23 */
743 cxx23
744 };
745
746 /* The C++ dialect being used. C++98 is the default. */
747 extern enum cxx_dialect cxx_dialect;
748
749 /* Maximum template instantiation depth. This limit is rather
750 arbitrary, but it exists to limit the time it takes to notice
751 excessively recursive template instantiations. */
752
753 extern int max_tinst_depth;
754
755 /* Nonzero means that we should not issue warnings about problems that
756 occur when the code is executed, because the code being processed
757 is not expected to be executed. This is set during parsing. This
758 is used for cases like sizeof() and "0 ? a : b". This is a count,
759 not a bool, because unexecuted expressions can nest. */
760
761 extern int c_inhibit_evaluation_warnings;
762
763 /* Whether lexing has been completed, so subsequent preprocessor
764 errors should use the compiler's input_location. */
765
766 extern bool done_lexing;
767
768 /* C types are partitioned into three subsets: object, function, and
769 incomplete types. */
770 #define C_TYPE_OBJECT_P(type) \
771 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
772
773 #define C_TYPE_INCOMPLETE_P(type) \
774 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
775
776 #define C_TYPE_FUNCTION_P(type) \
777 (TREE_CODE (type) == FUNCTION_TYPE)
778
779 /* For convenience we define a single macro to identify the class of
780 object or incomplete types. */
781 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
782 (!C_TYPE_FUNCTION_P (type))
783
784 /* Return true if TYPE is a vector type that should be subject to the GNU
785 vector extensions (as opposed to a vector type that is used only for
786 the purposes of defining target-specific built-in functions). */
787
788 inline bool
gnu_vector_type_p(const_tree type)789 gnu_vector_type_p (const_tree type)
790 {
791 return TREE_CODE (type) == VECTOR_TYPE && !TYPE_INDIVISIBLE_P (type);
792 }
793
794 struct visibility_flags
795 {
796 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
797 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
798 };
799
800 /* These enumerators are possible types of unsafe conversions. */
801 enum conversion_safety {
802 /* The conversion is safe. */
803 SAFE_CONVERSION = 0,
804 /* Another type of conversion with problems. */
805 UNSAFE_OTHER,
806 /* Conversion between signed and unsigned integers. */
807 UNSAFE_SIGN,
808 /* Conversions that reduce the precision of reals including conversions
809 from reals to integers. */
810 UNSAFE_REAL,
811 /* Conversions from complex to reals or integers, that discard imaginary
812 component. */
813 UNSAFE_IMAGINARY
814 };
815
816 /* Global visibility options. */
817 extern struct visibility_flags visibility_options;
818
819 /* Attribute table common to the C front ends. */
820 extern const struct attribute_spec c_common_attribute_table[];
821 extern const struct attribute_spec c_common_format_attribute_table[];
822
823 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
824 ID is the identifier to use, NAME is the string.
825 TYPE_DEP indicates whether it depends on type of the function or not
826 (i.e. __PRETTY_FUNCTION__). */
827
828 extern tree (*make_fname_decl) (location_t, tree, int);
829
830 /* In c-decl.c and cp/tree.c. FIXME. */
831 extern void c_register_addr_space (const char *str, addr_space_t as);
832
833 /* In c-common.c. */
834 extern bool in_late_binary_op;
835 extern const char *c_addr_space_name (addr_space_t as);
836 extern tree identifier_global_value (tree);
837 extern tree identifier_global_tag (tree);
838 extern bool names_builtin_p (const char *);
839 extern tree c_linkage_bindings (tree);
840 extern void record_builtin_type (enum rid, const char *, tree);
841 extern tree build_void_list_node (void);
842 extern void start_fname_decls (void);
843 extern void finish_fname_decls (void);
844 extern const char *fname_as_string (int);
845 extern tree fname_decl (location_t, unsigned, tree);
846
847 extern int check_user_alignment (const_tree, bool, bool);
848 extern bool check_function_arguments (location_t loc, const_tree, const_tree,
849 int, tree *, vec<location_t> *);
850 extern void check_function_arguments_recurse (void (*)
851 (void *, tree,
852 unsigned HOST_WIDE_INT),
853 void *, tree,
854 unsigned HOST_WIDE_INT);
855 extern bool check_builtin_function_arguments (location_t, vec<location_t>,
856 tree, tree, int, tree *);
857 extern void check_function_format (const_tree, tree, int, tree *,
858 vec<location_t> *);
859 extern bool attribute_fallthrough_p (tree);
860 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
861 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
862 extern bool c_common_handle_option (size_t, const char *, HOST_WIDE_INT, int,
863 location_t,
864 const struct cl_option_handlers *);
865 extern bool default_handle_c_option (size_t, const char *, int);
866 extern tree c_common_type_for_mode (machine_mode, int);
867 extern tree c_common_type_for_size (unsigned int, int);
868 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
869 int, int);
870 extern tree c_common_unsigned_type (tree);
871 extern tree c_common_signed_type (tree);
872 extern tree c_common_signed_or_unsigned_type (int, tree);
873 extern void c_common_init_ts (void);
874 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
875 extern enum conversion_safety unsafe_conversion_p (tree, tree, tree, bool);
876 extern bool decl_with_nonnull_addr_p (const_tree);
877 extern tree c_fully_fold (tree, bool, bool *, bool = false);
878 extern tree c_wrap_maybe_const (tree, bool);
879 extern tree c_common_truthvalue_conversion (location_t, tree);
880 extern void c_apply_type_quals_to_decl (int, tree);
881 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, bool, int);
882 extern tree c_alignof_expr (location_t, tree);
883 /* Print an error message for invalid operands to arith operation CODE.
884 NOP_EXPR is used as a special case (see truthvalue_conversion). */
885 extern void binary_op_error (rich_location *, enum tree_code, tree, tree);
886 extern tree fix_string_type (tree);
887 extern tree convert_and_check (location_t, tree, tree);
888 extern bool c_determine_visibility (tree);
889 extern bool vector_types_compatible_elements_p (tree, tree);
890 extern void mark_valid_location_for_stdc_pragma (bool);
891 extern bool valid_location_for_stdc_pragma_p (void);
892 extern void set_float_const_decimal64 (void);
893 extern void clear_float_const_decimal64 (void);
894 extern bool float_const_decimal64_p (void);
895
896 extern bool keyword_begins_type_specifier (enum rid);
897 extern bool keyword_is_storage_class_specifier (enum rid);
898 extern bool keyword_is_type_qualifier (enum rid);
899 extern bool keyword_is_decl_specifier (enum rid);
900 extern unsigned max_align_t_align (void);
901 extern bool cxx_fundamental_alignment_p (unsigned);
902 extern bool pointer_to_zero_sized_aggr_p (tree);
903 extern bool bool_promoted_to_int_p (tree);
904 extern tree fold_for_warn (tree);
905 extern tree c_common_get_narrower (tree, int *);
906 extern bool get_attribute_operand (tree, unsigned HOST_WIDE_INT *);
907 extern void c_common_finalize_early_debug (void);
908
909
910 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, false, 1)
911 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, false, 1)
912
913 /* Subroutine of build_binary_op, used for certain operations. */
914 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
915
916 /* Subroutine of build_binary_op, used for comparison operations.
917 See if the operands have both been converted from subword integer types
918 and, if so, perhaps change them both back to their original type. */
919 extern tree shorten_compare (location_t, tree *, tree *, tree *,
920 enum tree_code *);
921
922 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree,
923 bool = true);
924
925 /* Add qualifiers to a type, in the fashion for C. */
926 extern tree c_build_qualified_type (tree, int, tree = NULL_TREE, size_t = 0);
927
928 /* Build tree nodes and builtin functions common to both C and C++ language
929 frontends. */
930 extern void c_common_nodes_and_builtins (void);
931
932 extern void disable_builtin_function (const char *);
933
934 extern void set_compound_literal_name (tree decl);
935
936 extern tree build_va_arg (location_t, tree, tree);
937
938 extern const unsigned int c_family_lang_mask;
939 extern unsigned int c_common_option_lang_mask (void);
940 extern void c_common_diagnostics_set_defaults (diagnostic_context *);
941 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
942 extern void c_common_init_options_struct (struct gcc_options *);
943 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
944 extern bool c_common_post_options (const char **);
945 extern bool c_common_init (void);
946 extern void c_common_finish (void);
947 extern void c_common_parse_file (void);
948 extern FILE *get_dump_info (int, dump_flags_t *);
949 extern alias_set_type c_common_get_alias_set (tree);
950 extern void c_register_builtin_type (tree, const char*);
951 extern bool c_promoting_integer_type_p (const_tree);
952 extern bool self_promoting_args_p (const_tree);
953 extern tree strip_pointer_operator (tree);
954 extern tree strip_pointer_or_array_types (tree);
955 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
956
957 /* This is the basic parsing function. */
958 extern void c_parse_file (void);
959
960 extern void c_parse_final_cleanups (void);
961
962 /* These macros provide convenient access to the various _STMT nodes. */
963
964 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
965 if a statement expression. */
966 #define STATEMENT_LIST_STMT_EXPR(NODE) \
967 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
968
969 /* Nonzero if a label has been added to the statement list. */
970 #define STATEMENT_LIST_HAS_LABEL(NODE) \
971 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
972
973 /* C_MAYBE_CONST_EXPR accessors. */
974 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
975 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
976 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
977 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
978 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
979 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
980 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
981 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
982 #define EXPR_INT_CONST_OPERANDS(EXPR) \
983 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
984 && (TREE_CODE (EXPR) == INTEGER_CST \
985 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
986 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
987
988 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
989 #define DECL_C_BIT_FIELD(NODE) \
990 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
991 #define SET_DECL_C_BIT_FIELD(NODE) \
992 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
993 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
994 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
995
996 /* True if the decl was an unnamed bitfield. */
997 #define DECL_UNNAMED_BIT_FIELD(NODE) \
998 (DECL_C_BIT_FIELD (NODE) && !DECL_NAME (NODE))
999
1000 extern tree do_case (location_t, tree, tree);
1001 extern tree build_stmt (location_t, enum tree_code, ...);
1002 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
1003
1004 /* These functions must be defined by each front-end which implements
1005 a variant of the C language. They are used in c-common.c. */
1006
1007 extern tree build_unary_op (location_t, enum tree_code, tree, bool);
1008 extern tree build_binary_op (location_t, enum tree_code, tree, tree, bool);
1009 extern tree perform_integral_promotions (tree);
1010
1011 /* These functions must be defined by each front-end which implements
1012 a variant of the C language. They are used by port files. */
1013
1014 extern tree default_conversion (tree);
1015
1016 /* Given two integer or real types, return the type for their sum.
1017 Given two compatible ANSI C types, returns the merged type. */
1018
1019 extern tree common_type (tree, tree);
1020
1021 extern tree decl_constant_value (tree);
1022
1023 /* Handle increment and decrement of boolean types. */
1024 extern tree boolean_increment (enum tree_code, tree);
1025
1026 extern int case_compare (splay_tree_key, splay_tree_key);
1027
1028 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree);
1029 extern bool c_switch_covers_all_cases_p (splay_tree, tree);
1030 extern bool c_block_may_fallthru (const_tree);
1031
1032 extern tree build_function_call (location_t, tree, tree);
1033
1034 extern tree build_function_call_vec (location_t, vec<location_t>, tree,
1035 vec<tree, va_gc> *, vec<tree, va_gc> *,
1036 tree = NULL_TREE);
1037
1038 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
1039
1040 extern tree finish_label_address_expr (tree, location_t);
1041
1042 /* Same function prototype, but the C and C++ front ends have
1043 different implementations. Used in c-common.c. */
1044 extern tree lookup_label (tree);
1045 extern tree lookup_name (tree);
1046 extern bool lvalue_p (const_tree);
1047
1048 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
1049 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
1050 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true);
1051 extern tree c_build_vec_convert (location_t, tree, location_t, tree, bool = true);
1052
1053 extern void init_c_lex (void);
1054
1055 extern void c_cpp_builtins (cpp_reader *);
1056 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
1057 extern bool c_cpp_diagnostic (cpp_reader *, enum cpp_diagnostic_level,
1058 enum cpp_warning_reason, rich_location *,
1059 const char *, va_list *)
1060 ATTRIBUTE_GCC_DIAG(5,0);
1061 extern int c_common_has_attribute (cpp_reader *, bool);
1062 extern int c_common_has_builtin (cpp_reader *);
1063
1064 extern bool parse_optimize_options (tree, bool);
1065
1066 /* Positive if an implicit `extern "C"' scope has just been entered;
1067 negative if such a scope has just been exited. */
1068 extern GTY(()) int pending_lang_change;
1069
1070 /* Information recorded about each file examined during compilation. */
1071
1072 struct c_fileinfo
1073 {
1074 int time; /* Time spent in the file. */
1075
1076 /* Flags used only by C++.
1077 INTERFACE_ONLY nonzero means that we are in an "interface" section
1078 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
1079 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
1080 INTERFACE_ONLY is zero, it means that we are responsible for
1081 exporting definitions that others might need. */
1082 short interface_only;
1083 short interface_unknown;
1084 };
1085
1086 struct c_fileinfo *get_fileinfo (const char *);
1087 extern void dump_time_statistics (void);
1088
1089 extern bool c_dump_tree (void *, tree);
1090
1091 extern void verify_sequence_points (tree);
1092
1093 extern tree fold_offsetof (tree, tree = size_type_node,
1094 tree_code ctx = ERROR_MARK);
1095
1096 extern int complete_array_type (tree *, tree, bool);
1097 extern void complete_flexible_array_elts (tree);
1098
1099 extern tree builtin_type_for_size (int, bool);
1100
1101 extern void c_common_mark_addressable_vec (tree);
1102
1103 extern void set_underlying_type (tree);
1104 extern bool user_facing_original_type_p (const_tree);
1105 extern void record_types_used_by_current_var_decl (tree);
1106 extern vec<tree, va_gc> *make_tree_vector (void);
1107 extern void release_tree_vector (vec<tree, va_gc> *);
1108 extern vec<tree, va_gc> *make_tree_vector_single (tree);
1109 extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1110 extern vec<tree, va_gc> *make_tree_vector_from_ctor (tree);
1111 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1112
1113 /* Used for communication between c_common_type_for_mode and
1114 c_register_builtin_type. */
1115 extern GTY(()) tree registered_builtin_types;
1116
1117 /* Read SOURCE_DATE_EPOCH from environment to have a deterministic
1118 timestamp to replace embedded current dates to get reproducible
1119 results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */
1120 extern time_t cb_get_source_date_epoch (cpp_reader *pfile);
1121
1122 /* The value (as a unix timestamp) corresponds to date
1123 "Dec 31 9999 23:59:59 UTC", which is the latest date that __DATE__ and
1124 __TIME__ can store. */
1125 #define MAX_SOURCE_DATE_EPOCH HOST_WIDE_INT_C (253402300799)
1126
1127 /* Callback for libcpp for offering spelling suggestions for misspelled
1128 directives. */
1129 extern const char *cb_get_suggestion (cpp_reader *, const char *,
1130 const char *const *);
1131
1132 extern GTY(()) string_concat_db *g_string_concat_db;
1133
1134 class substring_loc;
1135 extern const char *c_get_substring_location (const substring_loc &substr_loc,
1136 location_t *out_loc);
1137
1138 /* In c-gimplify.c. */
1139 typedef struct bc_state
1140 {
1141 tree bc_label[2];
1142 } bc_state_t;
1143 extern void save_bc_state (bc_state_t *);
1144 extern void restore_bc_state (bc_state_t *);
1145 extern tree c_genericize_control_stmt (tree *, int *, void *,
1146 walk_tree_fn, walk_tree_lh);
1147 extern void c_genericize (tree);
1148 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1149 extern tree c_build_bind_expr (location_t, tree, tree);
1150
1151 /* In c-lex.c. */
1152 extern enum cpp_ttype
1153 conflict_marker_get_final_tok_kind (enum cpp_ttype tok1_kind);
1154
1155 /* In c-pch.c */
1156 extern void pch_init (void);
1157 extern void pch_cpp_save_state (void);
1158 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1159 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1160 const char *orig);
1161 extern void c_common_write_pch (void);
1162 extern void c_common_no_more_pch (void);
1163 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1164
1165 /* In *-checksum.c */
1166 extern const unsigned char executable_checksum[16];
1167
1168 /* In c-cppbuiltin.c */
1169 extern void builtin_define_std (const char *macro);
1170 extern void builtin_define_with_value (const char *, const char *, int);
1171 extern void builtin_define_with_int_value (const char *, HOST_WIDE_INT);
1172 extern void builtin_define_type_sizeof (const char *, tree);
1173 extern void c_stddef_cpp_builtins (void);
1174 extern void fe_file_change (const line_map_ordinary *);
1175 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char,
1176 rich_location *richloc);
1177
1178 /* In c-ppoutput.c */
1179 extern void init_pp_output (FILE *);
1180 extern void preprocess_file (cpp_reader *);
1181 extern void pp_file_change (const line_map_ordinary *);
1182 extern void pp_dir_change (cpp_reader *, const char *);
1183 extern bool check_missing_format_attribute (tree, tree);
1184
1185 /* In c-omp.c */
1186 typedef wide_int_bitmask omp_clause_mask;
1187
1188 #define OMP_CLAUSE_MASK_1 omp_clause_mask (1)
1189
1190 enum c_omp_clause_split
1191 {
1192 C_OMP_CLAUSE_SPLIT_TARGET = 0,
1193 C_OMP_CLAUSE_SPLIT_TEAMS,
1194 C_OMP_CLAUSE_SPLIT_DISTRIBUTE,
1195 C_OMP_CLAUSE_SPLIT_PARALLEL,
1196 C_OMP_CLAUSE_SPLIT_FOR,
1197 C_OMP_CLAUSE_SPLIT_SIMD,
1198 C_OMP_CLAUSE_SPLIT_COUNT,
1199 C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR,
1200 C_OMP_CLAUSE_SPLIT_TASKLOOP = C_OMP_CLAUSE_SPLIT_FOR,
1201 C_OMP_CLAUSE_SPLIT_LOOP = C_OMP_CLAUSE_SPLIT_FOR
1202 };
1203
1204 enum c_omp_region_type
1205 {
1206 C_ORT_OMP = 1 << 0,
1207 C_ORT_ACC = 1 << 1,
1208 C_ORT_DECLARE_SIMD = 1 << 2,
1209 C_ORT_OMP_DECLARE_SIMD = C_ORT_OMP | C_ORT_DECLARE_SIMD
1210 };
1211
1212 extern tree c_finish_omp_master (location_t, tree);
1213 extern tree c_finish_omp_taskgroup (location_t, tree, tree);
1214 extern tree c_finish_omp_critical (location_t, tree, tree, tree);
1215 extern tree c_finish_omp_ordered (location_t, tree, tree);
1216 extern void c_finish_omp_barrier (location_t);
1217 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1218 tree, tree, tree, tree, tree, bool,
1219 enum omp_memory_order, bool = false);
1220 extern bool c_omp_depend_t_p (tree);
1221 extern void c_finish_omp_depobj (location_t, tree, enum omp_clause_depend_kind,
1222 tree);
1223 extern void c_finish_omp_flush (location_t, int);
1224 extern void c_finish_omp_taskwait (location_t);
1225 extern void c_finish_omp_taskyield (location_t);
1226 extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree,
1227 tree, tree, tree, tree, bool);
1228 extern bool c_omp_check_loop_iv (tree, tree, walk_tree_lh);
1229 extern bool c_omp_check_loop_iv_exprs (location_t, tree, int, tree, tree, tree,
1230 walk_tree_lh);
1231 extern tree c_finish_oacc_wait (location_t, tree, tree);
1232 extern tree c_oacc_split_loop_clauses (tree, tree *, bool);
1233 extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask,
1234 tree, tree *);
1235 extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree);
1236 extern void c_omp_declare_simd_clauses_to_decls (tree, tree);
1237 extern bool c_omp_predefined_variable (tree);
1238 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1239 extern enum omp_clause_defaultmap_kind c_omp_predetermined_mapping (tree);
1240 extern tree c_omp_check_context_selector (location_t, tree);
1241 extern void c_omp_mark_declare_variant (location_t, tree, tree);
1242 extern const char *c_omp_map_clause_name (tree, bool);
1243 extern void c_omp_adjust_map_clauses (tree, bool);
1244
1245 /* Return next tree in the chain for chain_next walking of tree nodes. */
1246 static inline tree
c_tree_chain_next(tree t)1247 c_tree_chain_next (tree t)
1248 {
1249 /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1250 kind of object, never a long chain of nodes. Prefer
1251 TYPE_NEXT_VARIANT for types. */
1252 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1253 return TYPE_NEXT_VARIANT (t);
1254 /* Otherwise, if there is TREE_CHAIN, return it. */
1255 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1256 return TREE_CHAIN (t);
1257 return NULL;
1258 }
1259
1260 /* Mask used by tm_stmt_attr. */
1261 #define TM_STMT_ATTR_OUTER 2
1262 #define TM_STMT_ATTR_ATOMIC 4
1263 #define TM_STMT_ATTR_RELAXED 8
1264
1265 /* Mask used by tm_attr_to_mask and tm_mask_to_attr. Note that these
1266 are ordered specifically such that more restrictive attributes are
1267 at lower bit positions. This fact is known by the C++ tm attribute
1268 inheritance code such that least bit extraction (mask & -mask) results
1269 in the most restrictive attribute. */
1270 #define TM_ATTR_SAFE 1
1271 #define TM_ATTR_CALLABLE 2
1272 #define TM_ATTR_PURE 4
1273 #define TM_ATTR_IRREVOCABLE 8
1274 #define TM_ATTR_MAY_CANCEL_OUTER 16
1275
1276 /* A suffix-identifier value doublet that represents user-defined literals
1277 for C++-0x. */
1278 enum overflow_type {
1279 OT_UNDERFLOW = -1,
1280 OT_NONE,
1281 OT_OVERFLOW
1282 };
1283
1284 struct GTY(()) tree_userdef_literal {
1285 struct tree_base base;
1286 tree suffix_id;
1287 tree value;
1288 tree num_string;
1289 enum overflow_type overflow;
1290 };
1291
1292 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1293 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1294
1295 #define USERDEF_LITERAL_VALUE(NODE) \
1296 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1297
1298 #define USERDEF_LITERAL_OVERFLOW(NODE) \
1299 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1300
1301 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1302 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1303
1304 #define USERDEF_LITERAL_TYPE(NODE) \
1305 (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1306
1307 extern tree build_userdef_literal (tree suffix_id, tree value,
1308 enum overflow_type overflow,
1309 tree num_string);
1310
1311
1312 /* WHILE_STMT accessors. These give access to the condition of the
1313 while statement and the body of the while statement, respectively. */
1314 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
1315 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
1316
1317 /* DO_STMT accessors. These give access to the condition of the do
1318 statement and the body of the do statement, respectively. */
1319 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
1320 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
1321
1322 /* FOR_STMT accessors. These give access to the init statement,
1323 condition, update expression, and body of the for statement,
1324 respectively. */
1325 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
1326 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1327 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1328 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1329 #define FOR_SCOPE(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 4)
1330
1331 #define SWITCH_STMT_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1332 #define SWITCH_STMT_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1333 #define SWITCH_STMT_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1334 #define SWITCH_STMT_SCOPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 3)
1335 /* True if there are case labels for all possible values of switch cond, either
1336 because there is a default: case label or because the case label ranges cover
1337 all values. */
1338 #define SWITCH_STMT_ALL_CASES_P(NODE) \
1339 TREE_LANG_FLAG_0 (SWITCH_STMT_CHECK (NODE))
1340 /* True if the body of a switch stmt contains no BREAK_STMTs. */
1341 #define SWITCH_STMT_NO_BREAK_P(NODE) \
1342 TREE_LANG_FLAG_2 (SWITCH_STMT_CHECK (NODE))
1343
1344
1345 /* Nonzero if NODE is the target for genericization of 'break' stmts. */
1346 #define LABEL_DECL_BREAK(NODE) \
1347 DECL_LANG_FLAG_0 (LABEL_DECL_CHECK (NODE))
1348
1349 /* Nonzero if NODE is the target for genericization of 'continue' stmts. */
1350 #define LABEL_DECL_CONTINUE(NODE) \
1351 DECL_LANG_FLAG_1 (LABEL_DECL_CHECK (NODE))
1352
1353 extern bool convert_vector_to_array_for_subscript (location_t, tree *, tree);
1354
1355 /* Possibe cases of scalar_to_vector conversion. */
1356 enum stv_conv {
1357 stv_error, /* Error occurred. */
1358 stv_nothing, /* Nothing happened. */
1359 stv_firstarg, /* First argument must be expanded. */
1360 stv_secondarg /* Second argument must be expanded. */
1361 };
1362
1363 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1364 tree op0, tree op1, bool);
1365
1366 extern tree find_inv_trees (tree *, int *, void *);
1367 extern tree replace_inv_trees (tree *, int *, void *);
1368
1369 extern bool reject_gcc_builtin (const_tree, location_t = UNKNOWN_LOCATION);
1370 extern bool valid_array_size_p (location_t, const_tree, tree, bool = true);
1371 extern void invalid_array_size_error (location_t, cst_size_error,
1372 const_tree, const_tree);
1373
1374 /* In c-warn.c. */
1375 extern void constant_expression_warning (tree);
1376 extern void constant_expression_error (tree);
1377 extern void overflow_warning (location_t, tree, tree = NULL_TREE);
1378 extern void warn_logical_operator (location_t, enum tree_code, tree,
1379 enum tree_code, tree, enum tree_code, tree);
1380 extern void warn_tautological_cmp (const op_location_t &, enum tree_code,
1381 tree, tree);
1382 extern void warn_logical_not_parentheses (location_t, enum tree_code, tree,
1383 tree);
1384 extern bool warn_if_unused_value (const_tree, location_t, bool = false);
1385 extern bool strict_aliasing_warning (location_t, tree, tree);
1386 extern void sizeof_pointer_memaccess_warning (location_t *, tree,
1387 vec<tree, va_gc> *, tree *,
1388 bool (*) (tree, tree));
1389 extern void check_main_parameter_types (tree decl);
1390 extern void warnings_for_convert_and_check (location_t, tree, tree, tree);
1391 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree, bool);
1392 extern void warn_for_omitted_condop (location_t, tree);
1393 extern bool warn_for_restrict (unsigned, tree *, unsigned);
1394 extern void warn_for_address_or_pointer_of_packed_member (tree, tree);
1395 extern void warn_parm_array_mismatch (location_t, tree, tree);
1396 extern void maybe_warn_sizeof_array_div (location_t, tree, tree, tree, tree);
1397
1398 /* Places where an lvalue, or modifiable lvalue, may be required.
1399 Used to select diagnostic messages in lvalue_error and
1400 readonly_error. */
1401 enum lvalue_use {
1402 lv_assign,
1403 lv_increment,
1404 lv_decrement,
1405 lv_addressof,
1406 lv_asm
1407 };
1408
1409 extern void lvalue_error (location_t, enum lvalue_use);
1410 extern void invalid_indirection_error (location_t, tree, ref_operator);
1411 extern void readonly_error (location_t, tree, enum lvalue_use);
1412 extern void warn_array_subscript_with_type_char (location_t, tree);
1413 extern void warn_about_parentheses (location_t,
1414 enum tree_code,
1415 enum tree_code, tree,
1416 enum tree_code, tree);
1417 extern void warn_for_unused_label (tree label);
1418 extern void warn_for_div_by_zero (location_t, tree divisor);
1419 extern void warn_for_memset (location_t, tree, tree, int);
1420 extern void warn_for_sign_compare (location_t,
1421 tree orig_op0, tree orig_op1,
1422 tree op0, tree op1,
1423 tree result_type,
1424 enum tree_code resultcode);
1425 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1426 location_t);
1427 extern void do_warn_unused_parameter (tree);
1428 extern void record_locally_defined_typedef (tree);
1429 extern void maybe_record_typedef_use (tree);
1430 extern void maybe_warn_unused_local_typedefs (void);
1431 extern void maybe_warn_bool_compare (location_t, enum tree_code, tree, tree);
1432 extern bool maybe_warn_shift_overflow (location_t, tree, tree);
1433 extern void warn_duplicated_cond_add_or_warn (location_t, tree, vec<tree> **);
1434 extern bool diagnose_mismatched_attributes (tree, tree);
1435 extern tree do_warn_duplicated_branches_r (tree *, int *, void *);
1436 extern void warn_for_multistatement_macros (location_t, location_t,
1437 location_t, enum rid);
1438
1439 /* In c-attribs.c. */
1440 extern bool attribute_takes_identifier_p (const_tree);
1441 extern tree handle_deprecated_attribute (tree *, tree, tree, int, bool *);
1442 extern tree handle_unused_attribute (tree *, tree, tree, int, bool *);
1443 extern tree handle_fallthrough_attribute (tree *, tree, tree, int, bool *);
1444 extern int parse_tm_stmt_attr (tree, int);
1445 extern int tm_attr_to_mask (tree);
1446 extern tree tm_mask_to_attr (int);
1447 extern tree find_tm_attribute (tree);
1448 extern const struct attribute_spec::exclusions attr_cold_hot_exclusions[];
1449 extern const struct attribute_spec::exclusions attr_noreturn_exclusions[];
1450 extern tree handle_noreturn_attribute (tree *, tree, tree, int, bool *);
1451 extern bool has_attribute (location_t, tree, tree, tree (*)(tree));
1452 extern tree build_attr_access_from_parms (tree, bool);
1453
1454 /* In c-format.c. */
1455 extern bool valid_format_string_type_p (tree);
1456
1457 /* A bitmap of flags to positional_argument. */
1458 enum posargflags {
1459 /* Consider positional attribute argument value zero valid. */
1460 POSARG_ZERO = 1,
1461 /* Consider positional attribute argument value valid if it refers
1462 to the ellipsis (i.e., beyond the last typed argument). */
1463 POSARG_ELLIPSIS = 2
1464 };
1465
1466 extern tree positional_argument (const_tree, const_tree, tree, tree_code,
1467 int = 0, int = posargflags ());
1468
1469 extern enum flt_eval_method
1470 excess_precision_mode_join (enum flt_eval_method, enum flt_eval_method);
1471
1472 extern int c_flt_eval_method (bool ts18661_p);
1473 extern void add_no_sanitize_value (tree node, unsigned int flags);
1474
1475 extern void maybe_add_include_fixit (rich_location *, const char *, bool);
1476 extern void maybe_suggest_missing_token_insertion (rich_location *richloc,
1477 enum cpp_ttype token_type,
1478 location_t prev_token_loc);
1479 extern tree braced_lists_to_strings (tree, tree);
1480
1481 #if CHECKING_P
1482 namespace selftest {
1483 /* Declarations for specific families of tests within c-family,
1484 by source file, in alphabetical order. */
1485 extern void c_format_c_tests (void);
1486 extern void c_indentation_c_tests (void);
1487 extern void c_pretty_print_c_tests (void);
1488 extern void c_spellcheck_cc_tests (void);
1489
1490 /* The entrypoint for running all of the above tests. */
1491 extern void c_family_tests (void);
1492 } // namespace selftest
1493 #endif /* #if CHECKING_P */
1494
1495 #endif /* ! GCC_C_COMMON_H */
1496