1 /* Definitions for c-common.c.
2 Copyright (C) 1987-2019 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_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_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
97 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
98 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
99 RID_SIZEOF,
100
101 /* C extensions */
102 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
103 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
104 RID_TYPES_COMPATIBLE_P, RID_BUILTIN_COMPLEX, RID_BUILTIN_SHUFFLE,
105 RID_BUILTIN_CONVERTVECTOR, RID_BUILTIN_TGMATH,
106 RID_BUILTIN_HAS_ATTRIBUTE,
107 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
108
109 /* TS 18661-3 keywords, in the same sequence as the TI_* values. */
110 RID_FLOAT16,
111 RID_FLOATN_NX_FIRST = RID_FLOAT16,
112 RID_FLOAT32,
113 RID_FLOAT64,
114 RID_FLOAT128,
115 RID_FLOAT32X,
116 RID_FLOAT64X,
117 RID_FLOAT128X,
118 #define CASE_RID_FLOATN_NX \
119 case RID_FLOAT16: case RID_FLOAT32: case RID_FLOAT64: case RID_FLOAT128: \
120 case RID_FLOAT32X: case RID_FLOAT64X: case RID_FLOAT128X
121
122 RID_FRACT, RID_ACCUM, RID_AUTO_TYPE, RID_BUILTIN_CALL_WITH_STATIC_CHAIN,
123
124 /* "__GIMPLE", for the GIMPLE-parsing extension to the C frontend. */
125 RID_GIMPLE,
126
127 /* "__PHI", for parsing PHI function in GIMPLE FE. */
128 RID_PHI,
129
130 /* "__RTL", for the RTL-parsing extension to the C frontend. */
131 RID_RTL,
132
133 /* C11 */
134 RID_ALIGNAS, RID_GENERIC,
135
136 /* This means to warn that this is a C++ keyword, and then treat it
137 as a normal identifier. */
138 RID_CXX_COMPAT_WARN,
139
140 /* GNU transactional memory extension */
141 RID_TRANSACTION_ATOMIC, RID_TRANSACTION_RELAXED, RID_TRANSACTION_CANCEL,
142
143 /* Too many ways of getting the name of a function as a string */
144 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
145
146 /* C++ (some of these are keywords in Objective-C as well, but only
147 if they appear after a '@') */
148 RID_BOOL, RID_WCHAR, RID_CLASS,
149 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
150 RID_TEMPLATE, RID_NULL, RID_CATCH,
151 RID_DELETE, RID_FALSE, RID_NAMESPACE,
152 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
153 RID_THIS, RID_THROW, RID_TRUE,
154 RID_TRY, RID_TYPENAME, RID_TYPEID,
155 RID_USING, RID_CHAR16, RID_CHAR32,
156
157 /* casts */
158 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
159
160 /* C++ extensions */
161 RID_ADDRESSOF, RID_BASES,
162 RID_BUILTIN_LAUNDER, RID_DIRECT_BASES,
163 RID_HAS_NOTHROW_ASSIGN, RID_HAS_NOTHROW_CONSTRUCTOR,
164 RID_HAS_NOTHROW_COPY, RID_HAS_TRIVIAL_ASSIGN,
165 RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
166 RID_HAS_TRIVIAL_DESTRUCTOR, RID_HAS_UNIQUE_OBJ_REPRESENTATIONS,
167 RID_HAS_VIRTUAL_DESTRUCTOR,
168 RID_IS_ABSTRACT, RID_IS_AGGREGATE,
169 RID_IS_BASE_OF, RID_IS_CLASS,
170 RID_IS_EMPTY, RID_IS_ENUM,
171 RID_IS_FINAL, RID_IS_LITERAL_TYPE,
172 RID_IS_POD, RID_IS_POLYMORPHIC,
173 RID_IS_SAME_AS,
174 RID_IS_STD_LAYOUT, RID_IS_TRIVIAL,
175 RID_IS_TRIVIALLY_ASSIGNABLE, RID_IS_TRIVIALLY_CONSTRUCTIBLE,
176 RID_IS_TRIVIALLY_COPYABLE,
177 RID_IS_UNION, RID_UNDERLYING_TYPE,
178 RID_IS_ASSIGNABLE, RID_IS_CONSTRUCTIBLE,
179
180 /* C++11 */
181 RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
182
183 /* char8_t */
184 RID_CHAR8,
185
186 /* C++ concepts */
187 RID_CONCEPT, RID_REQUIRES,
188
189 /* C++ transactional memory. */
190 RID_ATOMIC_NOEXCEPT, RID_ATOMIC_CANCEL, RID_SYNCHRONIZED,
191
192 /* Objective-C ("AT" reserved words - they are only keywords when
193 they follow '@') */
194 RID_AT_ENCODE, RID_AT_END,
195 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
196 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, RID_AT_PACKAGE,
197 RID_AT_PROTOCOL, RID_AT_SELECTOR,
198 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
199 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
200 RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
201 RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
202 RID_AT_INTERFACE,
203 RID_AT_IMPLEMENTATION,
204
205 /* Named address support, mapping the keyword to a particular named address
206 number. Named address space 0 is reserved for the generic address. If
207 there are more than 254 named addresses, the addr_space_t type will need
208 to be grown from an unsigned char to unsigned short. */
209 RID_ADDR_SPACE_0, /* generic address */
210 RID_ADDR_SPACE_1,
211 RID_ADDR_SPACE_2,
212 RID_ADDR_SPACE_3,
213 RID_ADDR_SPACE_4,
214 RID_ADDR_SPACE_5,
215 RID_ADDR_SPACE_6,
216 RID_ADDR_SPACE_7,
217 RID_ADDR_SPACE_8,
218 RID_ADDR_SPACE_9,
219 RID_ADDR_SPACE_10,
220 RID_ADDR_SPACE_11,
221 RID_ADDR_SPACE_12,
222 RID_ADDR_SPACE_13,
223 RID_ADDR_SPACE_14,
224 RID_ADDR_SPACE_15,
225
226 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
227 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
228
229 /* __intN keywords. The _N_M here doesn't correspond to the intN
230 in the keyword; use the bitsize in int_n_t_data_t[M] for that.
231 For example, if int_n_t_data_t[0].bitsize is 13, then RID_INT_N_0
232 is for __int13. */
233
234 /* Note that the range to use is RID_FIRST_INT_N through
235 RID_FIRST_INT_N + NUM_INT_N_ENTS - 1 and c-parser.c has a list of
236 all RID_INT_N_* in a case statement. */
237
238 RID_INT_N_0,
239 RID_INT_N_1,
240 RID_INT_N_2,
241 RID_INT_N_3,
242
243 RID_FIRST_INT_N = RID_INT_N_0,
244 RID_LAST_INT_N = RID_INT_N_3,
245
246 RID_MAX,
247
248 RID_FIRST_MODIFIER = RID_STATIC,
249 RID_LAST_MODIFIER = RID_ONEWAY,
250
251 RID_FIRST_CXX11 = RID_CONSTEXPR,
252 RID_LAST_CXX11 = RID_STATIC_ASSERT,
253 RID_FIRST_AT = RID_AT_ENCODE,
254 RID_LAST_AT = RID_AT_IMPLEMENTATION,
255 RID_FIRST_PQ = RID_IN,
256 RID_LAST_PQ = RID_ONEWAY,
257 RID_FIRST_PATTR = RID_GETTER,
258 RID_LAST_PATTR = RID_NONATOMIC
259 };
260
261 #define OBJC_IS_AT_KEYWORD(rid) \
262 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
263 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
264
265 #define OBJC_IS_PQ_KEYWORD(rid) \
266 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
267 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
268
269 #define OBJC_IS_PATTR_KEYWORD(rid) \
270 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
271 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
272
273 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
274 'class') which are shared in a subtle way between Objective-C and
275 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
276 finds '@' followed by one of these identifiers (eg, '@class'), it
277 recognizes the whole as an Objective-C keyword. If the identifier
278 is found elsewhere, it follows the rules of the C/C++ language.
279 */
280 #define OBJC_IS_CXX_KEYWORD(rid) \
281 (rid == RID_CLASS || rid == RID_SYNCHRONIZED \
282 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
283 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
284
285 /* The elements of `ridpointers' are identifier nodes for the reserved
286 type names and storage classes. It is indexed by a RID_... value. */
287 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
288
289 /* Standard named or nameless data types of the C compiler. */
290
291 enum c_tree_index
292 {
293 CTI_CHAR8_TYPE,
294 CTI_CHAR16_TYPE,
295 CTI_CHAR32_TYPE,
296 CTI_WCHAR_TYPE,
297 CTI_UNDERLYING_WCHAR_TYPE,
298 CTI_WINT_TYPE,
299 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
300 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
301 CTI_INTMAX_TYPE,
302 CTI_UINTMAX_TYPE,
303 CTI_WIDEST_INT_LIT_TYPE,
304 CTI_WIDEST_UINT_LIT_TYPE,
305
306 /* Types for <stdint.h>, that may not be defined on all
307 targets. */
308 CTI_SIG_ATOMIC_TYPE,
309 CTI_INT8_TYPE,
310 CTI_INT16_TYPE,
311 CTI_INT32_TYPE,
312 CTI_INT64_TYPE,
313 CTI_UINT8_TYPE,
314 CTI_UINT16_TYPE,
315 CTI_UINT32_TYPE,
316 CTI_UINT64_TYPE,
317 CTI_INT_LEAST8_TYPE,
318 CTI_INT_LEAST16_TYPE,
319 CTI_INT_LEAST32_TYPE,
320 CTI_INT_LEAST64_TYPE,
321 CTI_UINT_LEAST8_TYPE,
322 CTI_UINT_LEAST16_TYPE,
323 CTI_UINT_LEAST32_TYPE,
324 CTI_UINT_LEAST64_TYPE,
325 CTI_INT_FAST8_TYPE,
326 CTI_INT_FAST16_TYPE,
327 CTI_INT_FAST32_TYPE,
328 CTI_INT_FAST64_TYPE,
329 CTI_UINT_FAST8_TYPE,
330 CTI_UINT_FAST16_TYPE,
331 CTI_UINT_FAST32_TYPE,
332 CTI_UINT_FAST64_TYPE,
333 CTI_INTPTR_TYPE,
334 CTI_UINTPTR_TYPE,
335
336 CTI_CHAR_ARRAY_TYPE,
337 CTI_CHAR8_ARRAY_TYPE,
338 CTI_CHAR16_ARRAY_TYPE,
339 CTI_CHAR32_ARRAY_TYPE,
340 CTI_WCHAR_ARRAY_TYPE,
341 CTI_STRING_TYPE,
342 CTI_CONST_STRING_TYPE,
343
344 /* Type for boolean expressions (bool in C++, int in C). */
345 CTI_TRUTHVALUE_TYPE,
346 CTI_TRUTHVALUE_TRUE,
347 CTI_TRUTHVALUE_FALSE,
348
349 CTI_DEFAULT_FUNCTION_TYPE,
350
351 /* These are not types, but we have to look them up all the time. */
352 CTI_FUNCTION_NAME_DECL,
353 CTI_PRETTY_FUNCTION_NAME_DECL,
354 CTI_C99_FUNCTION_NAME_DECL,
355 CTI_SAVED_FUNCTION_NAME_DECLS,
356
357 CTI_NULL,
358
359 CTI_MAX
360 };
361
362 #define C_CPP_HASHNODE(id) \
363 (&(((struct c_common_identifier *) (id))->node))
364 #define C_RID_CODE(id) \
365 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
366 #define C_SET_RID_CODE(id, code) \
367 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
368
369 /* Identifier part common to the C front ends. Inherits from
370 tree_identifier, despite appearances. */
371 struct GTY(()) c_common_identifier {
372 struct tree_common common;
373 struct cpp_hashnode node;
374 };
375
376 /* An entry in the reserved keyword table. */
377
378 struct c_common_resword
379 {
380 const char *const word;
381 ENUM_BITFIELD(rid) const rid : 16;
382 const unsigned int disable : 16;
383 };
384
385 /* Mode used to build pointers (VOIDmode means ptr_mode). */
386
387 extern machine_mode c_default_pointer_mode;
388
389 /* Extra cpp_ttype values for C++. */
390
391 /* A token type for template-ids. If a template-id is processed while
392 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
393 the value of the CPP_TEMPLATE_ID is whatever was returned by
394 cp_parser_template_id. */
395 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
396
397 /* A token type for nested-name-specifiers. If a
398 nested-name-specifier is processed while parsing tentatively, it is
399 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
400 CPP_NESTED_NAME_SPECIFIER is whatever was returned by
401 cp_parser_nested_name_specifier_opt. */
402 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
403
404 /* A token type for pre-parsed C++0x decltype. */
405 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
406
407 /* A token type for pre-parsed primary-expression (lambda- or statement-). */
408 #define CPP_PREPARSED_EXPR ((enum cpp_ttype) (CPP_DECLTYPE + 1))
409
410 /* The number of token types, including C++-specific ones. */
411 #define N_CP_TTYPES ((int) (CPP_PREPARSED_EXPR + 1))
412
413 /* Disable mask. Keywords are disabled if (reswords[i].disable &
414 mask) is _true_. Thus for keywords which are present in all
415 languages the disable field is zero. */
416
417 #define D_CONLY 0x0001 /* C only (not in C++). */
418 #define D_CXXONLY 0x0002 /* C++ only (not in C). */
419 #define D_C99 0x0004 /* In C, C99 only. */
420 #define D_CXX11 0x0008 /* In C++, C++11 only. */
421 #define D_EXT 0x0010 /* GCC extension. */
422 #define D_EXT89 0x0020 /* GCC extension incorporated in C99. */
423 #define D_ASM 0x0040 /* Disabled by -fno-asm. */
424 #define D_OBJC 0x0080 /* In Objective C and neither C nor C++. */
425 #define D_CXX_OBJC 0x0100 /* In Objective C, and C++, but not C. */
426 #define D_CXXWARN 0x0200 /* In C warn with -Wcxx-compat. */
427 #define D_CXX_CONCEPTS 0x0400 /* In C++, only with concepts. */
428 #define D_TRANSMEM 0X0800 /* C++ transactional memory TS. */
429 #define D_CXX_CHAR8_T 0X1000 /* In C++, only with -fchar8_t. */
430
431 #define D_CXX_CONCEPTS_FLAGS D_CXXONLY | D_CXX_CONCEPTS
432 #define D_CXX_CHAR8_T_FLAGS D_CXXONLY | D_CXX_CHAR8_T
433
434 /* The reserved keyword table. */
435 extern const struct c_common_resword c_common_reswords[];
436
437 /* The number of items in the reserved keyword table. */
438 extern const unsigned int num_c_common_reswords;
439
440 #define char8_type_node c_global_trees[CTI_CHAR8_TYPE]
441 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
442 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
443 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
444 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
445 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
446 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
447 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
448 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
449 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
450 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
451 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
452
453 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
454 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
455 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
456 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
457 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
458 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
459 #define c_uint16_type_node c_global_trees[CTI_UINT16_TYPE]
460 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
461 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
462 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
463 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
464 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
465 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
466 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
467 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
468 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
469 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
470 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
471 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
472 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
473 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
474 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
475 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
476 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
477 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
478 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
479 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
480
481 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
482 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
483 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
484
485 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
486 #define char8_array_type_node c_global_trees[CTI_CHAR8_ARRAY_TYPE]
487 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
488 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
489 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
490 #define string_type_node c_global_trees[CTI_STRING_TYPE]
491 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
492
493 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
494
495 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
496 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
497 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
498 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
499
500 /* The node for C++ `__null'. */
501 #define null_node c_global_trees[CTI_NULL]
502
503 extern GTY(()) tree c_global_trees[CTI_MAX];
504
505 /* Mark which labels are explicitly declared.
506 These may be shadowed, and may be referenced from nested functions. */
507 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
508
509 enum c_language_kind
510 {
511 clk_c = 0, /* C90, C94, C99, C11 or C2X */
512 clk_objc = 1, /* clk_c with ObjC features. */
513 clk_cxx = 2, /* ANSI/ISO C++ */
514 clk_objcxx = 3 /* clk_cxx with ObjC features. */
515 };
516
517 /* To test for a specific language use c_language, defined by each
518 front end. For "ObjC features" or "not C++" use the macros. */
519 extern c_language_kind c_language;
520
521 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
522 #define c_dialect_objc() ((c_language & clk_objc) != 0)
523
524 /* The various name of operator that appears in error messages. */
525 enum ref_operator {
526 /* NULL */
527 RO_NULL,
528 /* array indexing */
529 RO_ARRAY_INDEXING,
530 /* unary * */
531 RO_UNARY_STAR,
532 /* -> */
533 RO_ARROW,
534 /* implicit conversion */
535 RO_IMPLICIT_CONVERSION,
536 /* ->* */
537 RO_ARROW_STAR
538 };
539
540 /* Information about a statement tree. */
541
542 struct GTY(()) stmt_tree_s {
543 /* A stack of statement lists being collected. */
544 vec<tree, va_gc> *x_cur_stmt_list;
545
546 /* In C++, Nonzero if we should treat statements as full
547 expressions. In particular, this variable is non-zero if at the
548 end of a statement we should destroy any temporaries created
549 during that statement. Similarly, if, at the end of a block, we
550 should destroy any local variables in this block. Normally, this
551 variable is nonzero, since those are the normal semantics of
552 C++.
553
554 This flag has no effect in C. */
555 int stmts_are_full_exprs_p;
556 };
557
558 typedef struct stmt_tree_s *stmt_tree;
559
560 /* Global state pertinent to the current function. Some C dialects
561 extend this structure with additional fields. */
562
563 struct GTY(()) c_language_function {
564 /* While we are parsing the function, this contains information
565 about the statement-tree that we are building. */
566 struct stmt_tree_s x_stmt_tree;
567
568 /* Vector of locally defined typedefs, for
569 -Wunused-local-typedefs. */
570 vec<tree, va_gc> *local_typedefs;
571 };
572
573 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
574
575 /* When building a statement-tree, this is the current statement list
576 being collected. */
577 #define cur_stmt_list (stmt_list_stack->last ())
578
579 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
580
581 /* Language-specific hooks. */
582
583 /* If non-NULL, this function is called after a precompile header file
584 is loaded. */
585 extern void (*lang_post_pch_load) (void);
586
587 extern void push_file_scope (void);
588 extern void pop_file_scope (void);
589 extern stmt_tree current_stmt_tree (void);
590 extern tree push_stmt_list (void);
591 extern tree pop_stmt_list (tree);
592 extern tree add_stmt (tree);
593 extern void push_cleanup (tree, tree, bool);
594
595 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
596 location_t, tree, tree);
597 extern tree build_indirect_ref (location_t, tree, ref_operator);
598
599 extern bool has_c_linkage (const_tree decl);
600 extern bool c_decl_implicit (const_tree);
601
602 /* Switches common to the C front ends. */
603
604 /* Nonzero means don't output line number information. */
605
606 extern char flag_no_line_commands;
607
608 /* Nonzero causes -E output not to be done, but directives such as
609 #define that have side effects are still obeyed. */
610
611 extern char flag_no_output;
612
613 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
614 'N' or 'U' of the command line switch. */
615
616 extern char flag_dump_macros;
617
618 /* Nonzero means pass #include lines through to the output. */
619
620 extern char flag_dump_includes;
621
622 /* Nonzero means process PCH files while preprocessing. */
623
624 extern bool flag_pch_preprocess;
625
626 /* The file name to which we should write a precompiled header, or
627 NULL if no header will be written in this compile. */
628
629 extern const char *pch_file;
630
631 /* Nonzero if an ISO standard was selected. It rejects macros in the
632 user's namespace. */
633
634 extern int flag_iso;
635
636 /* C/ObjC language option variables. */
637
638
639 /* Nonzero means allow type mismatches in conditional expressions;
640 just make their values `void'. */
641
642 extern int flag_cond_mismatch;
643
644 /* Nonzero means enable C89 Amendment 1 features. */
645
646 extern int flag_isoc94;
647
648 /* Nonzero means use the ISO C99 (or later) dialect of C. */
649
650 extern int flag_isoc99;
651
652 /* Nonzero means use the ISO C11 (or later) dialect of C. */
653
654 extern int flag_isoc11;
655
656 /* Nonzero means use the ISO C2X dialect of C. */
657
658 extern int flag_isoc2x;
659
660 /* Nonzero means that we have builtin functions, and main is an int. */
661
662 extern int flag_hosted;
663
664 /* ObjC language option variables. */
665
666
667 /* Tells the compiler that this is a special run. Do not perform any
668 compiling, instead we are to test some platform dependent features
669 and output a C header file with appropriate definitions. */
670
671 extern int print_struct_values;
672
673 /* Tells the compiler what is the constant string class for ObjC. */
674
675 extern const char *constant_string_class_name;
676
677
678 /* C++ language option variables. */
679
680 /* The reference version of the ABI for -Wabi. */
681
682 extern int warn_abi_version;
683
684 /* Return TRUE if one of {flag_abi_version,flag_abi_compat_version} is
685 less than N and the other is at least N. */
686 #define abi_compat_version_crosses(N) \
687 (abi_version_at_least(N) \
688 != (flag_abi_compat_version == 0 \
689 || flag_abi_compat_version >= (N)))
690
691 /* Return TRUE if one of {flag_abi_version,warn_abi_version} is
692 less than N and the other is at least N, for use by -Wabi. */
693 #define abi_version_crosses(N) \
694 (abi_version_at_least(N) \
695 != (warn_abi_version == 0 \
696 || warn_abi_version >= (N)))
697
698 /* Nonzero means generate separate instantiation control files and
699 juggle them at link time. */
700
701 extern int flag_use_repository;
702
703 /* The supported C++ dialects. */
704
705 enum cxx_dialect {
706 cxx_unset,
707 /* C++98 with TC1 */
708 cxx98,
709 cxx03 = cxx98,
710 /* C++11 */
711 cxx0x,
712 cxx11 = cxx0x,
713 /* C++14 */
714 cxx14,
715 /* C++17 */
716 cxx17,
717 /* C++2a (C++20?) */
718 cxx2a
719 };
720
721 /* The C++ dialect being used. C++98 is the default. */
722 extern enum cxx_dialect cxx_dialect;
723
724 /* Maximum template instantiation depth. This limit is rather
725 arbitrary, but it exists to limit the time it takes to notice
726 excessively recursive template instantiations. */
727
728 extern int max_tinst_depth;
729
730 /* Nonzero means that we should not issue warnings about problems that
731 occur when the code is executed, because the code being processed
732 is not expected to be executed. This is set during parsing. This
733 is used for cases like sizeof() and "0 ? a : b". This is a count,
734 not a bool, because unexecuted expressions can nest. */
735
736 extern int c_inhibit_evaluation_warnings;
737
738 /* Whether lexing has been completed, so subsequent preprocessor
739 errors should use the compiler's input_location. */
740
741 extern bool done_lexing;
742
743 /* C types are partitioned into three subsets: object, function, and
744 incomplete types. */
745 #define C_TYPE_OBJECT_P(type) \
746 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
747
748 #define C_TYPE_INCOMPLETE_P(type) \
749 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
750
751 #define C_TYPE_FUNCTION_P(type) \
752 (TREE_CODE (type) == FUNCTION_TYPE)
753
754 /* For convenience we define a single macro to identify the class of
755 object or incomplete types. */
756 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
757 (!C_TYPE_FUNCTION_P (type))
758
759 struct visibility_flags
760 {
761 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
762 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
763 };
764
765 /* These enumerators are possible types of unsafe conversions. */
766 enum conversion_safety {
767 /* The conversion is safe. */
768 SAFE_CONVERSION = 0,
769 /* Another type of conversion with problems. */
770 UNSAFE_OTHER,
771 /* Conversion between signed and unsigned integers
772 which are all warned about immediately, so this is unused. */
773 UNSAFE_SIGN,
774 /* Conversions that reduce the precision of reals including conversions
775 from reals to integers. */
776 UNSAFE_REAL,
777 /* Conversions from complex to reals or integers, that discard imaginary
778 component. */
779 UNSAFE_IMAGINARY
780 };
781
782 /* Global visibility options. */
783 extern struct visibility_flags visibility_options;
784
785 /* Attribute table common to the C front ends. */
786 extern const struct attribute_spec c_common_attribute_table[];
787 extern const struct attribute_spec c_common_format_attribute_table[];
788
789 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
790 ID is the identifier to use, NAME is the string.
791 TYPE_DEP indicates whether it depends on type of the function or not
792 (i.e. __PRETTY_FUNCTION__). */
793
794 extern tree (*make_fname_decl) (location_t, tree, int);
795
796 /* In c-decl.c and cp/tree.c. FIXME. */
797 extern void c_register_addr_space (const char *str, addr_space_t as);
798
799 /* In c-common.c. */
800 extern bool in_late_binary_op;
801 extern const char *c_addr_space_name (addr_space_t as);
802 extern tree identifier_global_value (tree);
803 extern tree c_linkage_bindings (tree);
804 extern void record_builtin_type (enum rid, const char *, tree);
805 extern tree build_void_list_node (void);
806 extern void start_fname_decls (void);
807 extern void finish_fname_decls (void);
808 extern const char *fname_as_string (int);
809 extern tree fname_decl (location_t, unsigned, tree);
810
811 extern int check_user_alignment (const_tree, bool, bool);
812 extern bool check_function_arguments (location_t loc, const_tree, const_tree,
813 int, tree *, vec<location_t> *);
814 extern void check_function_arguments_recurse (void (*)
815 (void *, tree,
816 unsigned HOST_WIDE_INT),
817 void *, tree,
818 unsigned HOST_WIDE_INT);
819 extern bool check_builtin_function_arguments (location_t, vec<location_t>,
820 tree, int, tree *);
821 extern void check_function_format (const_tree, tree, int, tree *,
822 vec<location_t> *);
823 extern bool attribute_fallthrough_p (tree);
824 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
825 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
826 extern bool c_common_handle_option (size_t, const char *, HOST_WIDE_INT, int,
827 location_t,
828 const struct cl_option_handlers *);
829 extern bool default_handle_c_option (size_t, const char *, int);
830 extern tree c_common_type_for_mode (machine_mode, int);
831 extern tree c_common_type_for_size (unsigned int, int);
832 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
833 int, int);
834 extern tree c_common_unsigned_type (tree);
835 extern tree c_common_signed_type (tree);
836 extern tree c_common_signed_or_unsigned_type (int, tree);
837 extern void c_common_init_ts (void);
838 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
839 extern enum conversion_safety unsafe_conversion_p (location_t, tree, tree, tree,
840 bool);
841 extern bool decl_with_nonnull_addr_p (const_tree);
842 extern tree c_fully_fold (tree, bool, bool *, bool = false);
843 extern tree c_wrap_maybe_const (tree, bool);
844 extern tree c_common_truthvalue_conversion (location_t, tree);
845 extern void c_apply_type_quals_to_decl (int, tree);
846 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, bool, int);
847 extern tree c_alignof_expr (location_t, tree);
848 /* Print an error message for invalid operands to arith operation CODE.
849 NOP_EXPR is used as a special case (see truthvalue_conversion). */
850 extern void binary_op_error (rich_location *, enum tree_code, tree, tree);
851 extern tree fix_string_type (tree);
852 extern tree convert_and_check (location_t, tree, tree);
853 extern bool c_determine_visibility (tree);
854 extern bool vector_types_compatible_elements_p (tree, tree);
855 extern void mark_valid_location_for_stdc_pragma (bool);
856 extern bool valid_location_for_stdc_pragma_p (void);
857 extern void set_float_const_decimal64 (void);
858 extern void clear_float_const_decimal64 (void);
859 extern bool float_const_decimal64_p (void);
860
861 extern bool keyword_begins_type_specifier (enum rid);
862 extern bool keyword_is_storage_class_specifier (enum rid);
863 extern bool keyword_is_type_qualifier (enum rid);
864 extern bool keyword_is_decl_specifier (enum rid);
865 extern unsigned max_align_t_align (void);
866 extern bool cxx_fundamental_alignment_p (unsigned);
867 extern bool pointer_to_zero_sized_aggr_p (tree);
868 extern bool bool_promoted_to_int_p (tree);
869 extern tree fold_for_warn (tree);
870 extern tree c_common_get_narrower (tree, int *);
871 extern bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *);
872
873 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, false, 1)
874 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, false, 1)
875
876 /* Subroutine of build_binary_op, used for certain operations. */
877 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
878
879 /* Subroutine of build_binary_op, used for comparison operations.
880 See if the operands have both been converted from subword integer types
881 and, if so, perhaps change them both back to their original type. */
882 extern tree shorten_compare (location_t, tree *, tree *, tree *,
883 enum tree_code *);
884
885 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree,
886 bool = true);
887
888 /* Add qualifiers to a type, in the fashion for C. */
889 extern tree c_build_qualified_type (tree, int, tree = NULL_TREE, size_t = 0);
890
891 /* Build tree nodes and builtin functions common to both C and C++ language
892 frontends. */
893 extern void c_common_nodes_and_builtins (void);
894
895 extern void disable_builtin_function (const char *);
896
897 extern void set_compound_literal_name (tree decl);
898
899 extern tree build_va_arg (location_t, tree, tree);
900
901 extern const unsigned int c_family_lang_mask;
902 extern unsigned int c_common_option_lang_mask (void);
903 extern void c_common_diagnostics_set_defaults (diagnostic_context *);
904 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
905 extern void c_common_init_options_struct (struct gcc_options *);
906 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
907 extern bool c_common_post_options (const char **);
908 extern bool c_common_init (void);
909 extern void c_common_finish (void);
910 extern void c_common_parse_file (void);
911 extern FILE *get_dump_info (int, dump_flags_t *);
912 extern alias_set_type c_common_get_alias_set (tree);
913 extern void c_register_builtin_type (tree, const char*);
914 extern bool c_promoting_integer_type_p (const_tree);
915 extern bool self_promoting_args_p (const_tree);
916 extern tree strip_pointer_operator (tree);
917 extern tree strip_pointer_or_array_types (tree);
918 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
919
920 /* This is the basic parsing function. */
921 extern void c_parse_file (void);
922
923 extern void c_parse_final_cleanups (void);
924
925 /* These macros provide convenient access to the various _STMT nodes. */
926
927 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
928 if a statement expression. */
929 #define STATEMENT_LIST_STMT_EXPR(NODE) \
930 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
931
932 /* Nonzero if a label has been added to the statement list. */
933 #define STATEMENT_LIST_HAS_LABEL(NODE) \
934 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
935
936 /* C_MAYBE_CONST_EXPR accessors. */
937 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
938 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
939 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
940 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
941 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
942 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
943 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
944 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
945 #define EXPR_INT_CONST_OPERANDS(EXPR) \
946 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
947 && (TREE_CODE (EXPR) == INTEGER_CST \
948 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
949 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
950
951 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
952 #define DECL_C_BIT_FIELD(NODE) \
953 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
954 #define SET_DECL_C_BIT_FIELD(NODE) \
955 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
956 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
957 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
958
959 /* True if the decl was an unnamed bitfield. */
960 #define DECL_UNNAMED_BIT_FIELD(NODE) \
961 (DECL_C_BIT_FIELD (NODE) && !DECL_NAME (NODE))
962
963 extern tree do_case (location_t, tree, tree);
964 extern tree build_stmt (location_t, enum tree_code, ...);
965 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
966
967 /* These functions must be defined by each front-end which implements
968 a variant of the C language. They are used in c-common.c. */
969
970 extern tree build_unary_op (location_t, enum tree_code, tree, bool);
971 extern tree build_binary_op (location_t, enum tree_code, tree, tree, bool);
972 extern tree perform_integral_promotions (tree);
973
974 /* These functions must be defined by each front-end which implements
975 a variant of the C language. They are used by port files. */
976
977 extern tree default_conversion (tree);
978
979 /* Given two integer or real types, return the type for their sum.
980 Given two compatible ANSI C types, returns the merged type. */
981
982 extern tree common_type (tree, tree);
983
984 extern tree decl_constant_value (tree);
985
986 /* Handle increment and decrement of boolean types. */
987 extern tree boolean_increment (enum tree_code, tree);
988
989 extern int case_compare (splay_tree_key, splay_tree_key);
990
991 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree);
992 extern bool c_switch_covers_all_cases_p (splay_tree, tree);
993
994 extern tree build_function_call (location_t, tree, tree);
995
996 extern tree build_function_call_vec (location_t, vec<location_t>, tree,
997 vec<tree, va_gc> *, vec<tree, va_gc> *);
998
999 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
1000
1001 extern tree finish_label_address_expr (tree, location_t);
1002
1003 /* Same function prototype, but the C and C++ front ends have
1004 different implementations. Used in c-common.c. */
1005 extern tree lookup_label (tree);
1006 extern tree lookup_name (tree);
1007 extern bool lvalue_p (const_tree);
1008
1009 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
1010 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
1011 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true);
1012 extern tree c_build_vec_convert (location_t, tree, location_t, tree, bool = true);
1013
1014 extern void init_c_lex (void);
1015
1016 extern void c_cpp_builtins (cpp_reader *);
1017 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
1018 extern bool c_cpp_diagnostic (cpp_reader *, enum cpp_diagnostic_level,
1019 enum cpp_warning_reason, rich_location *,
1020 const char *, va_list *)
1021 ATTRIBUTE_GCC_DIAG(5,0);
1022 extern int c_common_has_attribute (cpp_reader *);
1023
1024 extern bool parse_optimize_options (tree, bool);
1025
1026 /* Positive if an implicit `extern "C"' scope has just been entered;
1027 negative if such a scope has just been exited. */
1028 extern GTY(()) int pending_lang_change;
1029
1030 /* Information recorded about each file examined during compilation. */
1031
1032 struct c_fileinfo
1033 {
1034 int time; /* Time spent in the file. */
1035
1036 /* Flags used only by C++.
1037 INTERFACE_ONLY nonzero means that we are in an "interface" section
1038 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
1039 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
1040 INTERFACE_ONLY is zero, it means that we are responsible for
1041 exporting definitions that others might need. */
1042 short interface_only;
1043 short interface_unknown;
1044 };
1045
1046 struct c_fileinfo *get_fileinfo (const char *);
1047 extern void dump_time_statistics (void);
1048
1049 extern bool c_dump_tree (void *, tree);
1050
1051 extern void verify_sequence_points (tree);
1052
1053 extern tree fold_offsetof (tree, tree = size_type_node,
1054 tree_code ctx = ERROR_MARK);
1055
1056 extern int complete_array_type (tree *, tree, bool);
1057 extern void complete_flexible_array_elts (tree);
1058
1059 extern tree builtin_type_for_size (int, bool);
1060
1061 extern void c_common_mark_addressable_vec (tree);
1062
1063 extern void set_underlying_type (tree);
1064 extern void record_types_used_by_current_var_decl (tree);
1065 extern vec<tree, va_gc> *make_tree_vector (void);
1066 extern void release_tree_vector (vec<tree, va_gc> *);
1067 extern vec<tree, va_gc> *make_tree_vector_single (tree);
1068 extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1069 extern vec<tree, va_gc> *make_tree_vector_from_ctor (tree);
1070 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1071
1072 /* Used for communication between c_common_type_for_mode and
1073 c_register_builtin_type. */
1074 extern GTY(()) tree registered_builtin_types;
1075
1076 /* Read SOURCE_DATE_EPOCH from environment to have a deterministic
1077 timestamp to replace embedded current dates to get reproducible
1078 results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */
1079 extern time_t cb_get_source_date_epoch (cpp_reader *pfile);
1080
1081 /* The value (as a unix timestamp) corresponds to date
1082 "Dec 31 9999 23:59:59 UTC", which is the latest date that __DATE__ and
1083 __TIME__ can store. */
1084 #define MAX_SOURCE_DATE_EPOCH HOST_WIDE_INT_C (253402300799)
1085
1086 /* Callback for libcpp for offering spelling suggestions for misspelled
1087 directives. */
1088 extern const char *cb_get_suggestion (cpp_reader *, const char *,
1089 const char *const *);
1090
1091 extern GTY(()) string_concat_db *g_string_concat_db;
1092
1093 class substring_loc;
1094 extern const char *c_get_substring_location (const substring_loc &substr_loc,
1095 location_t *out_loc);
1096
1097 /* In c-gimplify.c */
1098 extern void c_genericize (tree);
1099 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1100 extern tree c_build_bind_expr (location_t, tree, tree);
1101
1102 /* In c-lex.c. */
1103 extern enum cpp_ttype
1104 conflict_marker_get_final_tok_kind (enum cpp_ttype tok1_kind);
1105
1106 /* In c-pch.c */
1107 extern void pch_init (void);
1108 extern void pch_cpp_save_state (void);
1109 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1110 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1111 const char *orig);
1112 extern void c_common_write_pch (void);
1113 extern void c_common_no_more_pch (void);
1114 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1115
1116 /* In *-checksum.c */
1117 extern const unsigned char executable_checksum[16];
1118
1119 /* In c-cppbuiltin.c */
1120 extern void builtin_define_std (const char *macro);
1121 extern void builtin_define_with_value (const char *, const char *, int);
1122 extern void builtin_define_with_int_value (const char *, HOST_WIDE_INT);
1123 extern void builtin_define_type_sizeof (const char *, tree);
1124 extern void c_stddef_cpp_builtins (void);
1125 extern void fe_file_change (const line_map_ordinary *);
1126 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char,
1127 rich_location *richloc);
1128
1129 /* In c-ppoutput.c */
1130 extern void init_pp_output (FILE *);
1131 extern void preprocess_file (cpp_reader *);
1132 extern void pp_file_change (const line_map_ordinary *);
1133 extern void pp_dir_change (cpp_reader *, const char *);
1134 extern bool check_missing_format_attribute (tree, tree);
1135
1136 /* In c-omp.c */
1137 typedef wide_int_bitmask omp_clause_mask;
1138
1139 #define OMP_CLAUSE_MASK_1 omp_clause_mask (1)
1140
1141 enum c_omp_clause_split
1142 {
1143 C_OMP_CLAUSE_SPLIT_TARGET = 0,
1144 C_OMP_CLAUSE_SPLIT_TEAMS,
1145 C_OMP_CLAUSE_SPLIT_DISTRIBUTE,
1146 C_OMP_CLAUSE_SPLIT_PARALLEL,
1147 C_OMP_CLAUSE_SPLIT_FOR,
1148 C_OMP_CLAUSE_SPLIT_SIMD,
1149 C_OMP_CLAUSE_SPLIT_COUNT,
1150 C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR,
1151 C_OMP_CLAUSE_SPLIT_TASKLOOP = C_OMP_CLAUSE_SPLIT_FOR
1152 };
1153
1154 enum c_omp_region_type
1155 {
1156 C_ORT_OMP = 1 << 0,
1157 C_ORT_ACC = 1 << 1,
1158 C_ORT_DECLARE_SIMD = 1 << 2,
1159 C_ORT_OMP_DECLARE_SIMD = C_ORT_OMP | C_ORT_DECLARE_SIMD
1160 };
1161
1162 extern tree c_finish_omp_master (location_t, tree);
1163 extern tree c_finish_omp_taskgroup (location_t, tree, tree);
1164 extern tree c_finish_omp_critical (location_t, tree, tree, tree);
1165 extern tree c_finish_omp_ordered (location_t, tree, tree);
1166 extern void c_finish_omp_barrier (location_t);
1167 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1168 tree, tree, tree, tree, tree, bool,
1169 enum omp_memory_order, bool = false);
1170 extern bool c_omp_depend_t_p (tree);
1171 extern void c_finish_omp_depobj (location_t, tree, enum omp_clause_depend_kind,
1172 tree);
1173 extern void c_finish_omp_flush (location_t, int);
1174 extern void c_finish_omp_taskwait (location_t);
1175 extern void c_finish_omp_taskyield (location_t);
1176 extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree,
1177 tree, tree, tree, tree, bool);
1178 extern bool c_omp_check_loop_iv (tree, tree, walk_tree_lh);
1179 extern bool c_omp_check_loop_iv_exprs (location_t, tree, tree, tree, tree,
1180 walk_tree_lh);
1181 extern tree c_finish_oacc_wait (location_t, tree, tree);
1182 extern tree c_oacc_split_loop_clauses (tree, tree *, bool);
1183 extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask,
1184 tree, tree *);
1185 extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree);
1186 extern void c_omp_declare_simd_clauses_to_decls (tree, tree);
1187 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1188
1189 /* Return next tree in the chain for chain_next walking of tree nodes. */
1190 static inline tree
c_tree_chain_next(tree t)1191 c_tree_chain_next (tree t)
1192 {
1193 /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1194 kind of object, never a long chain of nodes. Prefer
1195 TYPE_NEXT_VARIANT for types. */
1196 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1197 return TYPE_NEXT_VARIANT (t);
1198 /* Otherwise, if there is TREE_CHAIN, return it. */
1199 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1200 return TREE_CHAIN (t);
1201 return NULL;
1202 }
1203
1204 /* Mask used by tm_stmt_attr. */
1205 #define TM_STMT_ATTR_OUTER 2
1206 #define TM_STMT_ATTR_ATOMIC 4
1207 #define TM_STMT_ATTR_RELAXED 8
1208
1209 /* Mask used by tm_attr_to_mask and tm_mask_to_attr. Note that these
1210 are ordered specifically such that more restrictive attributes are
1211 at lower bit positions. This fact is known by the C++ tm attribute
1212 inheritance code such that least bit extraction (mask & -mask) results
1213 in the most restrictive attribute. */
1214 #define TM_ATTR_SAFE 1
1215 #define TM_ATTR_CALLABLE 2
1216 #define TM_ATTR_PURE 4
1217 #define TM_ATTR_IRREVOCABLE 8
1218 #define TM_ATTR_MAY_CANCEL_OUTER 16
1219
1220 /* A suffix-identifier value doublet that represents user-defined literals
1221 for C++-0x. */
1222 enum overflow_type {
1223 OT_UNDERFLOW = -1,
1224 OT_NONE,
1225 OT_OVERFLOW
1226 };
1227
1228 struct GTY(()) tree_userdef_literal {
1229 struct tree_base base;
1230 tree suffix_id;
1231 tree value;
1232 tree num_string;
1233 enum overflow_type overflow;
1234 };
1235
1236 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1237 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1238
1239 #define USERDEF_LITERAL_VALUE(NODE) \
1240 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1241
1242 #define USERDEF_LITERAL_OVERFLOW(NODE) \
1243 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1244
1245 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1246 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1247
1248 #define USERDEF_LITERAL_TYPE(NODE) \
1249 (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1250
1251 extern tree build_userdef_literal (tree suffix_id, tree value,
1252 enum overflow_type overflow,
1253 tree num_string);
1254
1255 extern bool convert_vector_to_array_for_subscript (location_t, tree *, tree);
1256
1257 /* Possibe cases of scalar_to_vector conversion. */
1258 enum stv_conv {
1259 stv_error, /* Error occurred. */
1260 stv_nothing, /* Nothing happened. */
1261 stv_firstarg, /* First argument must be expanded. */
1262 stv_secondarg /* Second argument must be expanded. */
1263 };
1264
1265 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1266 tree op0, tree op1, bool);
1267
1268 extern tree find_inv_trees (tree *, int *, void *);
1269 extern tree replace_inv_trees (tree *, int *, void *);
1270
1271 extern bool reject_gcc_builtin (const_tree, location_t = UNKNOWN_LOCATION);
1272 extern bool valid_array_size_p (location_t, const_tree, tree, bool = true);
1273 extern void invalid_array_size_error (location_t, cst_size_error,
1274 const_tree, const_tree);
1275
1276 /* In c-warn.c. */
1277 extern void constant_expression_warning (tree);
1278 extern void constant_expression_error (tree);
1279 extern void overflow_warning (location_t, tree, tree = NULL_TREE);
1280 extern void warn_logical_operator (location_t, enum tree_code, tree,
1281 enum tree_code, tree, enum tree_code, tree);
1282 extern void warn_tautological_cmp (const op_location_t &, enum tree_code,
1283 tree, tree);
1284 extern void warn_logical_not_parentheses (location_t, enum tree_code, tree,
1285 tree);
1286 extern bool warn_if_unused_value (const_tree, location_t);
1287 extern bool strict_aliasing_warning (location_t, tree, tree);
1288 extern void sizeof_pointer_memaccess_warning (location_t *, tree,
1289 vec<tree, va_gc> *, tree *,
1290 bool (*) (tree, tree));
1291 extern void check_main_parameter_types (tree decl);
1292 extern void warnings_for_convert_and_check (location_t, tree, tree, tree);
1293 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree, bool);
1294 extern void warn_for_omitted_condop (location_t, tree);
1295 extern bool warn_for_restrict (unsigned, tree *, unsigned);
1296 extern void warn_for_address_or_pointer_of_packed_member (tree, tree);
1297
1298 /* Places where an lvalue, or modifiable lvalue, may be required.
1299 Used to select diagnostic messages in lvalue_error and
1300 readonly_error. */
1301 enum lvalue_use {
1302 lv_assign,
1303 lv_increment,
1304 lv_decrement,
1305 lv_addressof,
1306 lv_asm
1307 };
1308
1309 extern void lvalue_error (location_t, enum lvalue_use);
1310 extern void invalid_indirection_error (location_t, tree, ref_operator);
1311 extern void readonly_error (location_t, tree, enum lvalue_use);
1312 extern void warn_array_subscript_with_type_char (location_t, tree);
1313 extern void warn_about_parentheses (location_t,
1314 enum tree_code,
1315 enum tree_code, tree,
1316 enum tree_code, tree);
1317 extern void warn_for_unused_label (tree label);
1318 extern void warn_for_div_by_zero (location_t, tree divisor);
1319 extern void warn_for_memset (location_t, tree, tree, int);
1320 extern void warn_for_sign_compare (location_t,
1321 tree orig_op0, tree orig_op1,
1322 tree op0, tree op1,
1323 tree result_type,
1324 enum tree_code resultcode);
1325 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1326 location_t);
1327 extern void do_warn_unused_parameter (tree);
1328 extern void record_locally_defined_typedef (tree);
1329 extern void maybe_record_typedef_use (tree);
1330 extern void maybe_warn_unused_local_typedefs (void);
1331 extern void maybe_warn_bool_compare (location_t, enum tree_code, tree, tree);
1332 extern bool maybe_warn_shift_overflow (location_t, tree, tree);
1333 extern void warn_duplicated_cond_add_or_warn (location_t, tree, vec<tree> **);
1334 extern bool diagnose_mismatched_attributes (tree, tree);
1335 extern tree do_warn_duplicated_branches_r (tree *, int *, void *);
1336 extern void warn_for_multistatement_macros (location_t, location_t,
1337 location_t, enum rid);
1338
1339 /* In c-attribs.c. */
1340 extern bool attribute_takes_identifier_p (const_tree);
1341 extern tree handle_unused_attribute (tree *, tree, tree, int, bool *);
1342 extern int parse_tm_stmt_attr (tree, int);
1343 extern int tm_attr_to_mask (tree);
1344 extern tree tm_mask_to_attr (int);
1345 extern tree find_tm_attribute (tree);
1346 extern const struct attribute_spec::exclusions attr_cold_hot_exclusions[];
1347
1348 /* In c-format.c. */
1349 extern bool valid_format_string_type_p (tree);
1350
1351 /* A bitmap of flags to positional_argument. */
1352 enum posargflags {
1353 /* Consider positional attribute argument value zero valid. */
1354 POSARG_ZERO = 1,
1355 /* Consider positional attribute argument value valid if it refers
1356 to the ellipsis (i.e., beyond the last typed argument). */
1357 POSARG_ELLIPSIS = 2
1358 };
1359
1360 extern tree positional_argument (const_tree, const_tree, tree, tree_code,
1361 int = 0, int = posargflags ());
1362
1363 extern enum flt_eval_method
1364 excess_precision_mode_join (enum flt_eval_method, enum flt_eval_method);
1365
1366 extern int c_flt_eval_method (bool ts18661_p);
1367 extern void add_no_sanitize_value (tree node, unsigned int flags);
1368
1369 extern void maybe_add_include_fixit (rich_location *, const char *, bool);
1370 extern void maybe_suggest_missing_token_insertion (rich_location *richloc,
1371 enum cpp_ttype token_type,
1372 location_t prev_token_loc);
1373 extern tree braced_lists_to_strings (tree, tree);
1374
1375 extern bool has_attribute (location_t, tree, tree, tree (*)(tree));
1376
1377 #if CHECKING_P
1378 namespace selftest {
1379 /* Declarations for specific families of tests within c-family,
1380 by source file, in alphabetical order. */
1381 extern void c_format_c_tests (void);
1382 extern void c_indentation_c_tests (void);
1383 extern void c_pretty_print_c_tests (void);
1384 extern void c_spellcheck_cc_tests (void);
1385
1386 /* The entrypoint for running all of the above tests. */
1387 extern void c_family_tests (void);
1388 } // namespace selftest
1389 #endif /* #if CHECKING_P */
1390
1391 #endif /* ! GCC_C_COMMON_H */
1392