1 /* Definitions for c-common.c.
2 Copyright (C) 1987-2020 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 /* 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 /* C++20 */
184 RID_CONSTINIT, RID_CONSTEVAL,
185
186 /* char8_t */
187 RID_CHAR8,
188
189 /* C++ concepts */
190 RID_CONCEPT, RID_REQUIRES,
191
192 /* C++ coroutines */
193 RID_CO_AWAIT, RID_CO_YIELD, RID_CO_RETURN,
194
195 /* C++ transactional memory. */
196 RID_ATOMIC_NOEXCEPT, RID_ATOMIC_CANCEL, RID_SYNCHRONIZED,
197
198 /* Objective-C ("AT" reserved words - they are only keywords when
199 they follow '@') */
200 RID_AT_ENCODE, RID_AT_END,
201 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
202 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, RID_AT_PACKAGE,
203 RID_AT_PROTOCOL, RID_AT_SELECTOR,
204 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
205 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
206 RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
207 RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
208 RID_AT_INTERFACE,
209 RID_AT_IMPLEMENTATION,
210
211 /* Named address support, mapping the keyword to a particular named address
212 number. Named address space 0 is reserved for the generic address. If
213 there are more than 254 named addresses, the addr_space_t type will need
214 to be grown from an unsigned char to unsigned short. */
215 RID_ADDR_SPACE_0, /* generic address */
216 RID_ADDR_SPACE_1,
217 RID_ADDR_SPACE_2,
218 RID_ADDR_SPACE_3,
219 RID_ADDR_SPACE_4,
220 RID_ADDR_SPACE_5,
221 RID_ADDR_SPACE_6,
222 RID_ADDR_SPACE_7,
223 RID_ADDR_SPACE_8,
224 RID_ADDR_SPACE_9,
225 RID_ADDR_SPACE_10,
226 RID_ADDR_SPACE_11,
227 RID_ADDR_SPACE_12,
228 RID_ADDR_SPACE_13,
229 RID_ADDR_SPACE_14,
230 RID_ADDR_SPACE_15,
231
232 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
233 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
234
235 /* __intN keywords. The _N_M here doesn't correspond to the intN
236 in the keyword; use the bitsize in int_n_t_data_t[M] for that.
237 For example, if int_n_t_data_t[0].bitsize is 13, then RID_INT_N_0
238 is for __int13. */
239
240 /* Note that the range to use is RID_FIRST_INT_N through
241 RID_FIRST_INT_N + NUM_INT_N_ENTS - 1 and c-parser.c has a list of
242 all RID_INT_N_* in a case statement. */
243
244 RID_INT_N_0,
245 RID_INT_N_1,
246 RID_INT_N_2,
247 RID_INT_N_3,
248
249 RID_FIRST_INT_N = RID_INT_N_0,
250 RID_LAST_INT_N = RID_INT_N_3,
251
252 RID_MAX,
253
254 RID_FIRST_MODIFIER = RID_STATIC,
255 RID_LAST_MODIFIER = RID_ONEWAY,
256
257 RID_FIRST_CXX11 = RID_CONSTEXPR,
258 RID_LAST_CXX11 = RID_STATIC_ASSERT,
259 RID_FIRST_CXX20 = RID_CONSTINIT,
260 RID_LAST_CXX20 = RID_CONSTINIT,
261 RID_FIRST_AT = RID_AT_ENCODE,
262 RID_LAST_AT = RID_AT_IMPLEMENTATION,
263 RID_FIRST_PQ = RID_IN,
264 RID_LAST_PQ = RID_ONEWAY,
265 RID_FIRST_PATTR = RID_GETTER,
266 RID_LAST_PATTR = RID_NONATOMIC
267 };
268
269 #define OBJC_IS_AT_KEYWORD(rid) \
270 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
271 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
272
273 #define OBJC_IS_PQ_KEYWORD(rid) \
274 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
275 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
276
277 #define OBJC_IS_PATTR_KEYWORD(rid) \
278 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
279 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
280
281 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
282 'class') which are shared in a subtle way between Objective-C and
283 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
284 finds '@' followed by one of these identifiers (eg, '@class'), it
285 recognizes the whole as an Objective-C keyword. If the identifier
286 is found elsewhere, it follows the rules of the C/C++ language.
287 */
288 #define OBJC_IS_CXX_KEYWORD(rid) \
289 (rid == RID_CLASS || rid == RID_SYNCHRONIZED \
290 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
291 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
292
293 /* The elements of `ridpointers' are identifier nodes for the reserved
294 type names and storage classes. It is indexed by a RID_... value. */
295 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
296
297 /* Standard named or nameless data types of the C compiler. */
298
299 enum c_tree_index
300 {
301 CTI_CHAR8_TYPE,
302 CTI_CHAR16_TYPE,
303 CTI_CHAR32_TYPE,
304 CTI_WCHAR_TYPE,
305 CTI_UNDERLYING_WCHAR_TYPE,
306 CTI_WINT_TYPE,
307 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
308 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
309 CTI_INTMAX_TYPE,
310 CTI_UINTMAX_TYPE,
311 CTI_WIDEST_INT_LIT_TYPE,
312 CTI_WIDEST_UINT_LIT_TYPE,
313
314 /* Types for <stdint.h>, that may not be defined on all
315 targets. */
316 CTI_SIG_ATOMIC_TYPE,
317 CTI_INT8_TYPE,
318 CTI_INT16_TYPE,
319 CTI_INT32_TYPE,
320 CTI_INT64_TYPE,
321 CTI_UINT8_TYPE,
322 CTI_UINT16_TYPE,
323 CTI_UINT32_TYPE,
324 CTI_UINT64_TYPE,
325 CTI_INT_LEAST8_TYPE,
326 CTI_INT_LEAST16_TYPE,
327 CTI_INT_LEAST32_TYPE,
328 CTI_INT_LEAST64_TYPE,
329 CTI_UINT_LEAST8_TYPE,
330 CTI_UINT_LEAST16_TYPE,
331 CTI_UINT_LEAST32_TYPE,
332 CTI_UINT_LEAST64_TYPE,
333 CTI_INT_FAST8_TYPE,
334 CTI_INT_FAST16_TYPE,
335 CTI_INT_FAST32_TYPE,
336 CTI_INT_FAST64_TYPE,
337 CTI_UINT_FAST8_TYPE,
338 CTI_UINT_FAST16_TYPE,
339 CTI_UINT_FAST32_TYPE,
340 CTI_UINT_FAST64_TYPE,
341 CTI_INTPTR_TYPE,
342 CTI_UINTPTR_TYPE,
343
344 CTI_CHAR_ARRAY_TYPE,
345 CTI_CHAR8_ARRAY_TYPE,
346 CTI_CHAR16_ARRAY_TYPE,
347 CTI_CHAR32_ARRAY_TYPE,
348 CTI_WCHAR_ARRAY_TYPE,
349 CTI_STRING_TYPE,
350 CTI_CONST_STRING_TYPE,
351
352 /* Type for boolean expressions (bool in C++, int in C). */
353 CTI_TRUTHVALUE_TYPE,
354 CTI_TRUTHVALUE_TRUE,
355 CTI_TRUTHVALUE_FALSE,
356
357 CTI_DEFAULT_FUNCTION_TYPE,
358
359 /* These are not types, but we have to look them up all the time. */
360 CTI_FUNCTION_NAME_DECL,
361 CTI_PRETTY_FUNCTION_NAME_DECL,
362 CTI_C99_FUNCTION_NAME_DECL,
363 CTI_SAVED_FUNCTION_NAME_DECLS,
364
365 CTI_NULL,
366
367 CTI_MAX
368 };
369
370 #define C_CPP_HASHNODE(id) \
371 (&(((struct c_common_identifier *) (id))->node))
372 #define C_RID_CODE(id) \
373 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
374 #define C_SET_RID_CODE(id, code) \
375 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
376
377 /* Identifier part common to the C front ends. Inherits from
378 tree_identifier, despite appearances. */
379 struct GTY(()) c_common_identifier {
380 struct tree_common common;
381 struct cpp_hashnode node;
382 };
383
384 /* An entry in the reserved keyword table. */
385
386 struct c_common_resword
387 {
388 const char *const word;
389 ENUM_BITFIELD(rid) const rid : 16;
390 const unsigned int disable : 16;
391 };
392
393 /* Mode used to build pointers (VOIDmode means ptr_mode). */
394
395 extern machine_mode c_default_pointer_mode;
396
397 /* Extra cpp_ttype values for C++. */
398
399 /* A token type for template-ids. If a template-id is processed while
400 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
401 the value of the CPP_TEMPLATE_ID is whatever was returned by
402 cp_parser_template_id. */
403 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
404
405 /* A token type for nested-name-specifiers. If a
406 nested-name-specifier is processed while parsing tentatively, it is
407 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
408 CPP_NESTED_NAME_SPECIFIER is whatever was returned by
409 cp_parser_nested_name_specifier_opt. */
410 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
411
412 /* A token type for pre-parsed C++0x decltype. */
413 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
414
415 /* A token type for pre-parsed primary-expression (lambda- or statement-). */
416 #define CPP_PREPARSED_EXPR ((enum cpp_ttype) (CPP_DECLTYPE + 1))
417
418 /* The number of token types, including C++-specific ones. */
419 #define N_CP_TTYPES ((int) (CPP_PREPARSED_EXPR + 1))
420
421 /* Disable mask. Keywords are disabled if (reswords[i].disable &
422 mask) is _true_. Thus for keywords which are present in all
423 languages the disable field is zero. */
424
425 #define D_CONLY 0x0001 /* C only (not in C++). */
426 #define D_CXXONLY 0x0002 /* C++ only (not in C). */
427 #define D_C99 0x0004 /* In C, C99 only. */
428 #define D_CXX11 0x0008 /* In C++, C++11 only. */
429 #define D_EXT 0x0010 /* GCC extension. */
430 #define D_EXT89 0x0020 /* GCC extension incorporated in C99. */
431 #define D_ASM 0x0040 /* Disabled by -fno-asm. */
432 #define D_OBJC 0x0080 /* In Objective C and neither C nor C++. */
433 #define D_CXX_OBJC 0x0100 /* In Objective C, and C++, but not C. */
434 #define D_CXXWARN 0x0200 /* In C warn with -Wcxx-compat. */
435 #define D_CXX_CONCEPTS 0x0400 /* In C++, only with concepts. */
436 #define D_TRANSMEM 0X0800 /* C++ transactional memory TS. */
437 #define D_CXX_CHAR8_T 0X1000 /* In C++, only with -fchar8_t. */
438 #define D_CXX20 0x2000 /* In C++, C++20 only. */
439 #define D_CXX_COROUTINES 0x4000 /* In C++, only with coroutines. */
440
441 #define D_CXX_CONCEPTS_FLAGS D_CXXONLY | D_CXX_CONCEPTS
442 #define D_CXX_CHAR8_T_FLAGS D_CXXONLY | D_CXX_CHAR8_T
443 #define D_CXX_COROUTINES_FLAGS (D_CXXONLY | D_CXX_COROUTINES)
444
445 /* The reserved keyword table. */
446 extern const struct c_common_resword c_common_reswords[];
447
448 /* The number of items in the reserved keyword table. */
449 extern const unsigned int num_c_common_reswords;
450
451 #define char8_type_node c_global_trees[CTI_CHAR8_TYPE]
452 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
453 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
454 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
455 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
456 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
457 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
458 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
459 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
460 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
461 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
462 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
463
464 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
465 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
466 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
467 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
468 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
469 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
470 #define c_uint16_type_node c_global_trees[CTI_UINT16_TYPE]
471 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
472 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
473 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
474 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
475 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
476 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
477 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
478 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
479 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
480 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
481 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
482 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
483 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
484 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
485 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
486 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
487 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
488 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
489 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
490 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
491
492 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
493 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
494 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
495
496 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
497 #define char8_array_type_node c_global_trees[CTI_CHAR8_ARRAY_TYPE]
498 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
499 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
500 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
501 #define string_type_node c_global_trees[CTI_STRING_TYPE]
502 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
503
504 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
505
506 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
507 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
508 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
509 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
510
511 /* The node for C++ `__null'. */
512 #define null_node c_global_trees[CTI_NULL]
513
514 extern GTY(()) tree c_global_trees[CTI_MAX];
515
516 /* Mark which labels are explicitly declared.
517 These may be shadowed, and may be referenced from nested functions. */
518 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
519
520 enum c_language_kind
521 {
522 clk_c = 0, /* C90, C94, C99, C11 or C2X */
523 clk_objc = 1, /* clk_c with ObjC features. */
524 clk_cxx = 2, /* ANSI/ISO C++ */
525 clk_objcxx = 3 /* clk_cxx with ObjC features. */
526 };
527
528 /* To test for a specific language use c_language, defined by each
529 front end. For "ObjC features" or "not C++" use the macros. */
530 extern c_language_kind c_language;
531
532 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
533 #define c_dialect_objc() ((c_language & clk_objc) != 0)
534
535 /* The various name of operator that appears in error messages. */
536 enum ref_operator {
537 /* NULL */
538 RO_NULL,
539 /* array indexing */
540 RO_ARRAY_INDEXING,
541 /* unary * */
542 RO_UNARY_STAR,
543 /* -> */
544 RO_ARROW,
545 /* implicit conversion */
546 RO_IMPLICIT_CONVERSION,
547 /* ->* */
548 RO_ARROW_STAR
549 };
550
551 /* Information about a statement tree. */
552
553 struct GTY(()) stmt_tree_s {
554 /* A stack of statement lists being collected. */
555 vec<tree, va_gc> *x_cur_stmt_list;
556
557 /* In C++, Nonzero if we should treat statements as full
558 expressions. In particular, this variable is non-zero if at the
559 end of a statement we should destroy any temporaries created
560 during that statement. Similarly, if, at the end of a block, we
561 should destroy any local variables in this block. Normally, this
562 variable is nonzero, since those are the normal semantics of
563 C++.
564
565 This flag has no effect in C. */
566 int stmts_are_full_exprs_p;
567 };
568
569 typedef struct stmt_tree_s *stmt_tree;
570
571 /* Global state pertinent to the current function. Some C dialects
572 extend this structure with additional fields. */
573
574 struct GTY(()) c_language_function {
575 /* While we are parsing the function, this contains information
576 about the statement-tree that we are building. */
577 struct stmt_tree_s x_stmt_tree;
578
579 /* Vector of locally defined typedefs, for
580 -Wunused-local-typedefs. */
581 vec<tree, va_gc> *local_typedefs;
582 };
583
584 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
585
586 /* When building a statement-tree, this is the current statement list
587 being collected. */
588 #define cur_stmt_list (stmt_list_stack->last ())
589
590 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
591
592 /* Language-specific hooks. */
593
594 /* If non-NULL, this function is called after a precompile header file
595 is loaded. */
596 extern void (*lang_post_pch_load) (void);
597
598 extern void push_file_scope (void);
599 extern void pop_file_scope (void);
600 extern stmt_tree current_stmt_tree (void);
601 extern tree push_stmt_list (void);
602 extern tree pop_stmt_list (tree);
603 extern tree add_stmt (tree);
604 extern void push_cleanup (tree, tree, bool);
605
606 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
607 location_t, tree, tree);
608 extern tree build_indirect_ref (location_t, tree, ref_operator);
609
610 extern bool has_c_linkage (const_tree decl);
611 extern bool c_decl_implicit (const_tree);
612
613 /* Switches common to the C front ends. */
614
615 /* Nonzero means don't output line number information. */
616
617 extern char flag_no_line_commands;
618
619 /* Nonzero causes -E output not to be done, but directives such as
620 #define that have side effects are still obeyed. */
621
622 extern char flag_no_output;
623
624 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
625 'N' or 'U' of the command line switch. */
626
627 extern char flag_dump_macros;
628
629 /* Nonzero means pass #include lines through to the output. */
630
631 extern char flag_dump_includes;
632
633 /* Nonzero means process PCH files while preprocessing. */
634
635 extern bool flag_pch_preprocess;
636
637 /* The file name to which we should write a precompiled header, or
638 NULL if no header will be written in this compile. */
639
640 extern const char *pch_file;
641
642 /* Nonzero if an ISO standard was selected. It rejects macros in the
643 user's namespace. */
644
645 extern int flag_iso;
646
647 /* C/ObjC language option variables. */
648
649
650 /* Nonzero means allow type mismatches in conditional expressions;
651 just make their values `void'. */
652
653 extern int flag_cond_mismatch;
654
655 /* Nonzero means enable C89 Amendment 1 features. */
656
657 extern int flag_isoc94;
658
659 /* Nonzero means use the ISO C99 (or later) dialect of C. */
660
661 extern int flag_isoc99;
662
663 /* Nonzero means use the ISO C11 (or later) dialect of C. */
664
665 extern int flag_isoc11;
666
667 /* Nonzero means use the ISO C2X dialect of C. */
668
669 extern int flag_isoc2x;
670
671 /* Nonzero means that we have builtin functions, and main is an int. */
672
673 extern int flag_hosted;
674
675 /* ObjC language option variables. */
676
677
678 /* Tells the compiler that this is a special run. Do not perform any
679 compiling, instead we are to test some platform dependent features
680 and output a C header file with appropriate definitions. */
681
682 extern int print_struct_values;
683
684 /* Tells the compiler what is the constant string class for ObjC. */
685
686 extern const char *constant_string_class_name;
687
688
689 /* C++ language option variables. */
690
691 /* The reference version of the ABI for -Wabi. */
692
693 extern int warn_abi_version;
694
695 /* Return TRUE if one of {flag_abi_version,flag_abi_compat_version} is
696 less than N and the other is at least N. */
697 #define abi_compat_version_crosses(N) \
698 (abi_version_at_least(N) \
699 != (flag_abi_compat_version == 0 \
700 || flag_abi_compat_version >= (N)))
701
702 /* Return TRUE if one of {flag_abi_version,warn_abi_version} is
703 less than N and the other is at least N, for use by -Wabi. */
704 #define abi_version_crosses(N) \
705 (abi_version_at_least(N) \
706 != (warn_abi_version == 0 \
707 || warn_abi_version >= (N)))
708
709 /* The supported C++ dialects. */
710
711 enum cxx_dialect {
712 cxx_unset,
713 /* C++98 with TC1 */
714 cxx98,
715 cxx03 = cxx98,
716 /* C++11 */
717 cxx0x,
718 cxx11 = cxx0x,
719 /* C++14 */
720 cxx14,
721 /* C++17 */
722 cxx17,
723 /* C++2a (C++20?) */
724 cxx2a
725 };
726
727 /* The C++ dialect being used. C++98 is the default. */
728 extern enum cxx_dialect cxx_dialect;
729
730 /* Maximum template instantiation depth. This limit is rather
731 arbitrary, but it exists to limit the time it takes to notice
732 excessively recursive template instantiations. */
733
734 extern int max_tinst_depth;
735
736 /* Nonzero means that we should not issue warnings about problems that
737 occur when the code is executed, because the code being processed
738 is not expected to be executed. This is set during parsing. This
739 is used for cases like sizeof() and "0 ? a : b". This is a count,
740 not a bool, because unexecuted expressions can nest. */
741
742 extern int c_inhibit_evaluation_warnings;
743
744 /* Whether lexing has been completed, so subsequent preprocessor
745 errors should use the compiler's input_location. */
746
747 extern bool done_lexing;
748
749 /* C types are partitioned into three subsets: object, function, and
750 incomplete types. */
751 #define C_TYPE_OBJECT_P(type) \
752 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
753
754 #define C_TYPE_INCOMPLETE_P(type) \
755 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
756
757 #define C_TYPE_FUNCTION_P(type) \
758 (TREE_CODE (type) == FUNCTION_TYPE)
759
760 /* For convenience we define a single macro to identify the class of
761 object or incomplete types. */
762 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
763 (!C_TYPE_FUNCTION_P (type))
764
765 /* Return true if TYPE is a vector type that should be subject to the GNU
766 vector extensions (as opposed to a vector type that is used only for
767 the purposes of defining target-specific built-in functions). */
768
769 inline bool
gnu_vector_type_p(const_tree type)770 gnu_vector_type_p (const_tree type)
771 {
772 return TREE_CODE (type) == VECTOR_TYPE && !TYPE_INDIVISIBLE_P (type);
773 }
774
775 struct visibility_flags
776 {
777 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
778 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
779 };
780
781 /* These enumerators are possible types of unsafe conversions. */
782 enum conversion_safety {
783 /* The conversion is safe. */
784 SAFE_CONVERSION = 0,
785 /* Another type of conversion with problems. */
786 UNSAFE_OTHER,
787 /* Conversion between signed and unsigned integers. */
788 UNSAFE_SIGN,
789 /* Conversions that reduce the precision of reals including conversions
790 from reals to integers. */
791 UNSAFE_REAL,
792 /* Conversions from complex to reals or integers, that discard imaginary
793 component. */
794 UNSAFE_IMAGINARY
795 };
796
797 /* Global visibility options. */
798 extern struct visibility_flags visibility_options;
799
800 /* Attribute table common to the C front ends. */
801 extern const struct attribute_spec c_common_attribute_table[];
802 extern const struct attribute_spec c_common_format_attribute_table[];
803
804 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
805 ID is the identifier to use, NAME is the string.
806 TYPE_DEP indicates whether it depends on type of the function or not
807 (i.e. __PRETTY_FUNCTION__). */
808
809 extern tree (*make_fname_decl) (location_t, tree, int);
810
811 /* In c-decl.c and cp/tree.c. FIXME. */
812 extern void c_register_addr_space (const char *str, addr_space_t as);
813
814 /* In c-common.c. */
815 extern bool in_late_binary_op;
816 extern const char *c_addr_space_name (addr_space_t as);
817 extern tree identifier_global_value (tree);
818 extern tree identifier_global_tag (tree);
819 extern bool names_builtin_p (const char *);
820 extern tree c_linkage_bindings (tree);
821 extern void record_builtin_type (enum rid, const char *, tree);
822 extern tree build_void_list_node (void);
823 extern void start_fname_decls (void);
824 extern void finish_fname_decls (void);
825 extern const char *fname_as_string (int);
826 extern tree fname_decl (location_t, unsigned, tree);
827
828 extern int check_user_alignment (const_tree, bool, bool);
829 extern bool check_function_arguments (location_t loc, const_tree, const_tree,
830 int, tree *, vec<location_t> *);
831 extern void check_function_arguments_recurse (void (*)
832 (void *, tree,
833 unsigned HOST_WIDE_INT),
834 void *, tree,
835 unsigned HOST_WIDE_INT);
836 extern bool check_builtin_function_arguments (location_t, vec<location_t>,
837 tree, tree, int, tree *);
838 extern void check_function_format (const_tree, tree, int, tree *,
839 vec<location_t> *);
840 extern bool attribute_fallthrough_p (tree);
841 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
842 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
843 extern bool c_common_handle_option (size_t, const char *, HOST_WIDE_INT, int,
844 location_t,
845 const struct cl_option_handlers *);
846 extern bool default_handle_c_option (size_t, const char *, int);
847 extern tree c_common_type_for_mode (machine_mode, int);
848 extern tree c_common_type_for_size (unsigned int, int);
849 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
850 int, int);
851 extern tree c_common_unsigned_type (tree);
852 extern tree c_common_signed_type (tree);
853 extern tree c_common_signed_or_unsigned_type (int, tree);
854 extern void c_common_init_ts (void);
855 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
856 extern enum conversion_safety unsafe_conversion_p (tree, tree, tree, bool);
857 extern bool decl_with_nonnull_addr_p (const_tree);
858 extern tree c_fully_fold (tree, bool, bool *, bool = false);
859 extern tree c_wrap_maybe_const (tree, bool);
860 extern tree c_common_truthvalue_conversion (location_t, tree);
861 extern void c_apply_type_quals_to_decl (int, tree);
862 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, bool, int);
863 extern tree c_alignof_expr (location_t, tree);
864 /* Print an error message for invalid operands to arith operation CODE.
865 NOP_EXPR is used as a special case (see truthvalue_conversion). */
866 extern void binary_op_error (rich_location *, enum tree_code, tree, tree);
867 extern tree fix_string_type (tree);
868 extern tree convert_and_check (location_t, tree, tree);
869 extern bool c_determine_visibility (tree);
870 extern bool vector_types_compatible_elements_p (tree, tree);
871 extern void mark_valid_location_for_stdc_pragma (bool);
872 extern bool valid_location_for_stdc_pragma_p (void);
873 extern void set_float_const_decimal64 (void);
874 extern void clear_float_const_decimal64 (void);
875 extern bool float_const_decimal64_p (void);
876
877 extern bool keyword_begins_type_specifier (enum rid);
878 extern bool keyword_is_storage_class_specifier (enum rid);
879 extern bool keyword_is_type_qualifier (enum rid);
880 extern bool keyword_is_decl_specifier (enum rid);
881 extern unsigned max_align_t_align (void);
882 extern bool cxx_fundamental_alignment_p (unsigned);
883 extern bool pointer_to_zero_sized_aggr_p (tree);
884 extern bool bool_promoted_to_int_p (tree);
885 extern tree fold_for_warn (tree);
886 extern tree c_common_get_narrower (tree, int *);
887 extern bool get_attribute_operand (tree, unsigned HOST_WIDE_INT *);
888
889 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, false, 1)
890 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, false, 1)
891
892 /* Subroutine of build_binary_op, used for certain operations. */
893 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
894
895 /* Subroutine of build_binary_op, used for comparison operations.
896 See if the operands have both been converted from subword integer types
897 and, if so, perhaps change them both back to their original type. */
898 extern tree shorten_compare (location_t, tree *, tree *, tree *,
899 enum tree_code *);
900
901 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree,
902 bool = true);
903
904 /* Add qualifiers to a type, in the fashion for C. */
905 extern tree c_build_qualified_type (tree, int, tree = NULL_TREE, size_t = 0);
906
907 /* Build tree nodes and builtin functions common to both C and C++ language
908 frontends. */
909 extern void c_common_nodes_and_builtins (void);
910
911 extern void disable_builtin_function (const char *);
912
913 extern void set_compound_literal_name (tree decl);
914
915 extern tree build_va_arg (location_t, tree, tree);
916
917 extern const unsigned int c_family_lang_mask;
918 extern unsigned int c_common_option_lang_mask (void);
919 extern void c_common_diagnostics_set_defaults (diagnostic_context *);
920 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
921 extern void c_common_init_options_struct (struct gcc_options *);
922 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
923 extern bool c_common_post_options (const char **);
924 extern bool c_common_init (void);
925 extern void c_common_finish (void);
926 extern void c_common_parse_file (void);
927 extern FILE *get_dump_info (int, dump_flags_t *);
928 extern alias_set_type c_common_get_alias_set (tree);
929 extern void c_register_builtin_type (tree, const char*);
930 extern bool c_promoting_integer_type_p (const_tree);
931 extern bool self_promoting_args_p (const_tree);
932 extern tree strip_pointer_operator (tree);
933 extern tree strip_pointer_or_array_types (tree);
934 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
935
936 /* This is the basic parsing function. */
937 extern void c_parse_file (void);
938
939 extern void c_parse_final_cleanups (void);
940
941 /* These macros provide convenient access to the various _STMT nodes. */
942
943 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
944 if a statement expression. */
945 #define STATEMENT_LIST_STMT_EXPR(NODE) \
946 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
947
948 /* Nonzero if a label has been added to the statement list. */
949 #define STATEMENT_LIST_HAS_LABEL(NODE) \
950 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
951
952 /* C_MAYBE_CONST_EXPR accessors. */
953 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
954 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
955 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
956 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
957 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
958 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
959 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
960 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
961 #define EXPR_INT_CONST_OPERANDS(EXPR) \
962 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
963 && (TREE_CODE (EXPR) == INTEGER_CST \
964 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
965 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
966
967 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
968 #define DECL_C_BIT_FIELD(NODE) \
969 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
970 #define SET_DECL_C_BIT_FIELD(NODE) \
971 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
972 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
973 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
974
975 /* True if the decl was an unnamed bitfield. */
976 #define DECL_UNNAMED_BIT_FIELD(NODE) \
977 (DECL_C_BIT_FIELD (NODE) && !DECL_NAME (NODE))
978
979 extern tree do_case (location_t, tree, tree);
980 extern tree build_stmt (location_t, enum tree_code, ...);
981 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
982
983 /* These functions must be defined by each front-end which implements
984 a variant of the C language. They are used in c-common.c. */
985
986 extern tree build_unary_op (location_t, enum tree_code, tree, bool);
987 extern tree build_binary_op (location_t, enum tree_code, tree, tree, bool);
988 extern tree perform_integral_promotions (tree);
989
990 /* These functions must be defined by each front-end which implements
991 a variant of the C language. They are used by port files. */
992
993 extern tree default_conversion (tree);
994
995 /* Given two integer or real types, return the type for their sum.
996 Given two compatible ANSI C types, returns the merged type. */
997
998 extern tree common_type (tree, tree);
999
1000 extern tree decl_constant_value (tree);
1001
1002 /* Handle increment and decrement of boolean types. */
1003 extern tree boolean_increment (enum tree_code, tree);
1004
1005 extern int case_compare (splay_tree_key, splay_tree_key);
1006
1007 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree);
1008 extern bool c_switch_covers_all_cases_p (splay_tree, tree);
1009
1010 extern tree build_function_call (location_t, tree, tree);
1011
1012 extern tree build_function_call_vec (location_t, vec<location_t>, tree,
1013 vec<tree, va_gc> *, vec<tree, va_gc> *,
1014 tree = NULL_TREE);
1015
1016 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
1017
1018 extern tree finish_label_address_expr (tree, location_t);
1019
1020 /* Same function prototype, but the C and C++ front ends have
1021 different implementations. Used in c-common.c. */
1022 extern tree lookup_label (tree);
1023 extern tree lookup_name (tree);
1024 extern bool lvalue_p (const_tree);
1025
1026 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
1027 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
1028 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true);
1029 extern tree c_build_vec_convert (location_t, tree, location_t, tree, bool = true);
1030
1031 extern void init_c_lex (void);
1032
1033 extern void c_cpp_builtins (cpp_reader *);
1034 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
1035 extern bool c_cpp_diagnostic (cpp_reader *, enum cpp_diagnostic_level,
1036 enum cpp_warning_reason, rich_location *,
1037 const char *, va_list *)
1038 ATTRIBUTE_GCC_DIAG(5,0);
1039 extern int c_common_has_attribute (cpp_reader *);
1040 extern int c_common_has_builtin (cpp_reader *);
1041
1042 extern bool parse_optimize_options (tree, bool);
1043
1044 /* Positive if an implicit `extern "C"' scope has just been entered;
1045 negative if such a scope has just been exited. */
1046 extern GTY(()) int pending_lang_change;
1047
1048 /* Information recorded about each file examined during compilation. */
1049
1050 struct c_fileinfo
1051 {
1052 int time; /* Time spent in the file. */
1053
1054 /* Flags used only by C++.
1055 INTERFACE_ONLY nonzero means that we are in an "interface" section
1056 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
1057 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
1058 INTERFACE_ONLY is zero, it means that we are responsible for
1059 exporting definitions that others might need. */
1060 short interface_only;
1061 short interface_unknown;
1062 };
1063
1064 struct c_fileinfo *get_fileinfo (const char *);
1065 extern void dump_time_statistics (void);
1066
1067 extern bool c_dump_tree (void *, tree);
1068
1069 extern void verify_sequence_points (tree);
1070
1071 extern tree fold_offsetof (tree, tree = size_type_node,
1072 tree_code ctx = ERROR_MARK);
1073
1074 extern int complete_array_type (tree *, tree, bool);
1075 extern void complete_flexible_array_elts (tree);
1076
1077 extern tree builtin_type_for_size (int, bool);
1078
1079 extern void c_common_mark_addressable_vec (tree);
1080
1081 extern void set_underlying_type (tree);
1082 extern bool user_facing_original_type_p (const_tree);
1083 extern void record_types_used_by_current_var_decl (tree);
1084 extern vec<tree, va_gc> *make_tree_vector (void);
1085 extern void release_tree_vector (vec<tree, va_gc> *);
1086 extern vec<tree, va_gc> *make_tree_vector_single (tree);
1087 extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1088 extern vec<tree, va_gc> *make_tree_vector_from_ctor (tree);
1089 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1090
1091 /* Used for communication between c_common_type_for_mode and
1092 c_register_builtin_type. */
1093 extern GTY(()) tree registered_builtin_types;
1094
1095 /* Read SOURCE_DATE_EPOCH from environment to have a deterministic
1096 timestamp to replace embedded current dates to get reproducible
1097 results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */
1098 extern time_t cb_get_source_date_epoch (cpp_reader *pfile);
1099
1100 /* The value (as a unix timestamp) corresponds to date
1101 "Dec 31 9999 23:59:59 UTC", which is the latest date that __DATE__ and
1102 __TIME__ can store. */
1103 #define MAX_SOURCE_DATE_EPOCH HOST_WIDE_INT_C (253402300799)
1104
1105 /* Callback for libcpp for offering spelling suggestions for misspelled
1106 directives. */
1107 extern const char *cb_get_suggestion (cpp_reader *, const char *,
1108 const char *const *);
1109
1110 extern GTY(()) string_concat_db *g_string_concat_db;
1111
1112 class substring_loc;
1113 extern const char *c_get_substring_location (const substring_loc &substr_loc,
1114 location_t *out_loc);
1115
1116 /* In c-gimplify.c */
1117 extern void c_genericize (tree);
1118 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1119 extern tree c_build_bind_expr (location_t, tree, tree);
1120
1121 /* In c-lex.c. */
1122 extern enum cpp_ttype
1123 conflict_marker_get_final_tok_kind (enum cpp_ttype tok1_kind);
1124
1125 /* In c-pch.c */
1126 extern void pch_init (void);
1127 extern void pch_cpp_save_state (void);
1128 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1129 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1130 const char *orig);
1131 extern void c_common_write_pch (void);
1132 extern void c_common_no_more_pch (void);
1133 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1134
1135 /* In *-checksum.c */
1136 extern const unsigned char executable_checksum[16];
1137
1138 /* In c-cppbuiltin.c */
1139 extern void builtin_define_std (const char *macro);
1140 extern void builtin_define_with_value (const char *, const char *, int);
1141 extern void builtin_define_with_int_value (const char *, HOST_WIDE_INT);
1142 extern void builtin_define_type_sizeof (const char *, tree);
1143 extern void c_stddef_cpp_builtins (void);
1144 extern void fe_file_change (const line_map_ordinary *);
1145 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char,
1146 rich_location *richloc);
1147
1148 /* In c-ppoutput.c */
1149 extern void init_pp_output (FILE *);
1150 extern void preprocess_file (cpp_reader *);
1151 extern void pp_file_change (const line_map_ordinary *);
1152 extern void pp_dir_change (cpp_reader *, const char *);
1153 extern bool check_missing_format_attribute (tree, tree);
1154
1155 /* In c-omp.c */
1156 typedef wide_int_bitmask omp_clause_mask;
1157
1158 #define OMP_CLAUSE_MASK_1 omp_clause_mask (1)
1159
1160 enum c_omp_clause_split
1161 {
1162 C_OMP_CLAUSE_SPLIT_TARGET = 0,
1163 C_OMP_CLAUSE_SPLIT_TEAMS,
1164 C_OMP_CLAUSE_SPLIT_DISTRIBUTE,
1165 C_OMP_CLAUSE_SPLIT_PARALLEL,
1166 C_OMP_CLAUSE_SPLIT_FOR,
1167 C_OMP_CLAUSE_SPLIT_SIMD,
1168 C_OMP_CLAUSE_SPLIT_COUNT,
1169 C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR,
1170 C_OMP_CLAUSE_SPLIT_TASKLOOP = C_OMP_CLAUSE_SPLIT_FOR,
1171 C_OMP_CLAUSE_SPLIT_LOOP = C_OMP_CLAUSE_SPLIT_FOR
1172 };
1173
1174 enum c_omp_region_type
1175 {
1176 C_ORT_OMP = 1 << 0,
1177 C_ORT_ACC = 1 << 1,
1178 C_ORT_DECLARE_SIMD = 1 << 2,
1179 C_ORT_OMP_DECLARE_SIMD = C_ORT_OMP | C_ORT_DECLARE_SIMD
1180 };
1181
1182 extern tree c_finish_omp_master (location_t, tree);
1183 extern tree c_finish_omp_taskgroup (location_t, tree, tree);
1184 extern tree c_finish_omp_critical (location_t, tree, tree, tree);
1185 extern tree c_finish_omp_ordered (location_t, tree, tree);
1186 extern void c_finish_omp_barrier (location_t);
1187 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1188 tree, tree, tree, tree, tree, bool,
1189 enum omp_memory_order, bool = false);
1190 extern bool c_omp_depend_t_p (tree);
1191 extern void c_finish_omp_depobj (location_t, tree, enum omp_clause_depend_kind,
1192 tree);
1193 extern void c_finish_omp_flush (location_t, int);
1194 extern void c_finish_omp_taskwait (location_t);
1195 extern void c_finish_omp_taskyield (location_t);
1196 extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree,
1197 tree, tree, tree, tree, bool);
1198 extern bool c_omp_check_loop_iv (tree, tree, walk_tree_lh);
1199 extern bool c_omp_check_loop_iv_exprs (location_t, tree, tree, tree, tree,
1200 walk_tree_lh);
1201 extern tree c_finish_oacc_wait (location_t, tree, tree);
1202 extern tree c_oacc_split_loop_clauses (tree, tree *, bool);
1203 extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask,
1204 tree, tree *);
1205 extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree);
1206 extern void c_omp_declare_simd_clauses_to_decls (tree, tree);
1207 extern bool c_omp_predefined_variable (tree);
1208 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1209 extern tree c_omp_check_context_selector (location_t, tree);
1210 extern void c_omp_mark_declare_variant (location_t, tree, tree);
1211 extern const char *c_omp_map_clause_name (tree, bool);
1212
1213 /* Return next tree in the chain for chain_next walking of tree nodes. */
1214 static inline tree
c_tree_chain_next(tree t)1215 c_tree_chain_next (tree t)
1216 {
1217 /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1218 kind of object, never a long chain of nodes. Prefer
1219 TYPE_NEXT_VARIANT for types. */
1220 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1221 return TYPE_NEXT_VARIANT (t);
1222 /* Otherwise, if there is TREE_CHAIN, return it. */
1223 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1224 return TREE_CHAIN (t);
1225 return NULL;
1226 }
1227
1228 /* Mask used by tm_stmt_attr. */
1229 #define TM_STMT_ATTR_OUTER 2
1230 #define TM_STMT_ATTR_ATOMIC 4
1231 #define TM_STMT_ATTR_RELAXED 8
1232
1233 /* Mask used by tm_attr_to_mask and tm_mask_to_attr. Note that these
1234 are ordered specifically such that more restrictive attributes are
1235 at lower bit positions. This fact is known by the C++ tm attribute
1236 inheritance code such that least bit extraction (mask & -mask) results
1237 in the most restrictive attribute. */
1238 #define TM_ATTR_SAFE 1
1239 #define TM_ATTR_CALLABLE 2
1240 #define TM_ATTR_PURE 4
1241 #define TM_ATTR_IRREVOCABLE 8
1242 #define TM_ATTR_MAY_CANCEL_OUTER 16
1243
1244 /* A suffix-identifier value doublet that represents user-defined literals
1245 for C++-0x. */
1246 enum overflow_type {
1247 OT_UNDERFLOW = -1,
1248 OT_NONE,
1249 OT_OVERFLOW
1250 };
1251
1252 struct GTY(()) tree_userdef_literal {
1253 struct tree_base base;
1254 tree suffix_id;
1255 tree value;
1256 tree num_string;
1257 enum overflow_type overflow;
1258 };
1259
1260 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1261 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1262
1263 #define USERDEF_LITERAL_VALUE(NODE) \
1264 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1265
1266 #define USERDEF_LITERAL_OVERFLOW(NODE) \
1267 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1268
1269 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1270 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1271
1272 #define USERDEF_LITERAL_TYPE(NODE) \
1273 (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1274
1275 extern tree build_userdef_literal (tree suffix_id, tree value,
1276 enum overflow_type overflow,
1277 tree num_string);
1278
1279 extern bool convert_vector_to_array_for_subscript (location_t, tree *, tree);
1280
1281 /* Possibe cases of scalar_to_vector conversion. */
1282 enum stv_conv {
1283 stv_error, /* Error occurred. */
1284 stv_nothing, /* Nothing happened. */
1285 stv_firstarg, /* First argument must be expanded. */
1286 stv_secondarg /* Second argument must be expanded. */
1287 };
1288
1289 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1290 tree op0, tree op1, bool);
1291
1292 extern tree find_inv_trees (tree *, int *, void *);
1293 extern tree replace_inv_trees (tree *, int *, void *);
1294
1295 extern bool reject_gcc_builtin (const_tree, location_t = UNKNOWN_LOCATION);
1296 extern bool valid_array_size_p (location_t, const_tree, tree, bool = true);
1297 extern void invalid_array_size_error (location_t, cst_size_error,
1298 const_tree, const_tree);
1299
1300 /* In c-warn.c. */
1301 extern void constant_expression_warning (tree);
1302 extern void constant_expression_error (tree);
1303 extern void overflow_warning (location_t, tree, tree = NULL_TREE);
1304 extern void warn_logical_operator (location_t, enum tree_code, tree,
1305 enum tree_code, tree, enum tree_code, tree);
1306 extern void warn_tautological_cmp (const op_location_t &, enum tree_code,
1307 tree, tree);
1308 extern void warn_logical_not_parentheses (location_t, enum tree_code, tree,
1309 tree);
1310 extern bool warn_if_unused_value (const_tree, location_t, bool = false);
1311 extern bool strict_aliasing_warning (location_t, tree, tree);
1312 extern void sizeof_pointer_memaccess_warning (location_t *, tree,
1313 vec<tree, va_gc> *, tree *,
1314 bool (*) (tree, tree));
1315 extern void check_main_parameter_types (tree decl);
1316 extern void warnings_for_convert_and_check (location_t, tree, tree, tree);
1317 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree, bool);
1318 extern void warn_for_omitted_condop (location_t, tree);
1319 extern bool warn_for_restrict (unsigned, tree *, unsigned);
1320 extern void warn_for_address_or_pointer_of_packed_member (tree, tree);
1321
1322 /* Places where an lvalue, or modifiable lvalue, may be required.
1323 Used to select diagnostic messages in lvalue_error and
1324 readonly_error. */
1325 enum lvalue_use {
1326 lv_assign,
1327 lv_increment,
1328 lv_decrement,
1329 lv_addressof,
1330 lv_asm
1331 };
1332
1333 extern void lvalue_error (location_t, enum lvalue_use);
1334 extern void invalid_indirection_error (location_t, tree, ref_operator);
1335 extern void readonly_error (location_t, tree, enum lvalue_use);
1336 extern void warn_array_subscript_with_type_char (location_t, tree);
1337 extern void warn_about_parentheses (location_t,
1338 enum tree_code,
1339 enum tree_code, tree,
1340 enum tree_code, tree);
1341 extern void warn_for_unused_label (tree label);
1342 extern void warn_for_div_by_zero (location_t, tree divisor);
1343 extern void warn_for_memset (location_t, tree, tree, int);
1344 extern void warn_for_sign_compare (location_t,
1345 tree orig_op0, tree orig_op1,
1346 tree op0, tree op1,
1347 tree result_type,
1348 enum tree_code resultcode);
1349 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1350 location_t);
1351 extern void do_warn_unused_parameter (tree);
1352 extern void record_locally_defined_typedef (tree);
1353 extern void maybe_record_typedef_use (tree);
1354 extern void maybe_warn_unused_local_typedefs (void);
1355 extern void maybe_warn_bool_compare (location_t, enum tree_code, tree, tree);
1356 extern bool maybe_warn_shift_overflow (location_t, tree, tree);
1357 extern void warn_duplicated_cond_add_or_warn (location_t, tree, vec<tree> **);
1358 extern bool diagnose_mismatched_attributes (tree, tree);
1359 extern tree do_warn_duplicated_branches_r (tree *, int *, void *);
1360 extern void warn_for_multistatement_macros (location_t, location_t,
1361 location_t, enum rid);
1362
1363 /* In c-attribs.c. */
1364 extern bool attribute_takes_identifier_p (const_tree);
1365 extern tree handle_deprecated_attribute (tree *, tree, tree, int, bool *);
1366 extern tree handle_unused_attribute (tree *, tree, tree, int, bool *);
1367 extern tree handle_fallthrough_attribute (tree *, tree, tree, int, bool *);
1368 extern int parse_tm_stmt_attr (tree, int);
1369 extern int tm_attr_to_mask (tree);
1370 extern tree tm_mask_to_attr (int);
1371 extern tree find_tm_attribute (tree);
1372 extern const struct attribute_spec::exclusions attr_cold_hot_exclusions[];
1373 extern const struct attribute_spec::exclusions attr_noreturn_exclusions[];
1374 extern tree handle_noreturn_attribute (tree *, tree, tree, int, bool *);
1375
1376 /* In c-format.c. */
1377 extern bool valid_format_string_type_p (tree);
1378
1379 /* A bitmap of flags to positional_argument. */
1380 enum posargflags {
1381 /* Consider positional attribute argument value zero valid. */
1382 POSARG_ZERO = 1,
1383 /* Consider positional attribute argument value valid if it refers
1384 to the ellipsis (i.e., beyond the last typed argument). */
1385 POSARG_ELLIPSIS = 2
1386 };
1387
1388 extern tree positional_argument (const_tree, const_tree, tree, tree_code,
1389 int = 0, int = posargflags ());
1390
1391 extern enum flt_eval_method
1392 excess_precision_mode_join (enum flt_eval_method, enum flt_eval_method);
1393
1394 extern int c_flt_eval_method (bool ts18661_p);
1395 extern void add_no_sanitize_value (tree node, unsigned int flags);
1396
1397 extern void maybe_add_include_fixit (rich_location *, const char *, bool);
1398 extern void maybe_suggest_missing_token_insertion (rich_location *richloc,
1399 enum cpp_ttype token_type,
1400 location_t prev_token_loc);
1401 extern tree braced_lists_to_strings (tree, tree);
1402
1403 extern bool has_attribute (location_t, tree, tree, tree (*)(tree));
1404
1405 #if CHECKING_P
1406 namespace selftest {
1407 /* Declarations for specific families of tests within c-family,
1408 by source file, in alphabetical order. */
1409 extern void c_format_c_tests (void);
1410 extern void c_indentation_c_tests (void);
1411 extern void c_pretty_print_c_tests (void);
1412 extern void c_spellcheck_cc_tests (void);
1413
1414 /* The entrypoint for running all of the above tests. */
1415 extern void c_family_tests (void);
1416 } // namespace selftest
1417 #endif /* #if CHECKING_P */
1418
1419 #endif /* ! GCC_C_COMMON_H */
1420