1/* Definitions for c-common.c.
2 Copyright (C) 1987-2017 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along 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
29/* In order for the format checking to accept the C frontend
30 diagnostic framework extensions, you must include this file before
31 diagnostic-core.h, not after. The C front end formats are a subset of those
32 for C++, so they are the appropriate set to use in common code;
33 cp-tree.h overrides this for C++. */
34#if defined(GCC_DIAGNOSTIC_CORE_H)
35#error \
36In order for the format checking to accept the C front end diagnostic \
37framework extensions, you must include this file before diagnostic-core.h \
38never after.
39#endif
40#ifndef GCC_DIAG_STYLE
41#define GCC_DIAG_STYLE __gcc_cdiag__
42#endif
43#include "diagnostic-core.h"
44
45/* Usage of TREE_LANG_FLAG_?:
46 0: IDENTIFIER_MARKED (used by search routines).
47 C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
48 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
49 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
50 C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
51 2: unused
52 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
53 4: unused
54*/
55
56/* Reserved identifiers. This is the union of all the keywords for C,
57 C++, and Objective-C. All the type modifiers have to be in one
58 block at the beginning, because they are used as mask bits. There
59 are 28 type modifiers; if we add many more we will have to redesign
60 the mask mechanism. */
61
62enum rid
63{
64 /* Modifiers: */
65 /* C, in empirical order of frequency. */
66 RID_STATIC = 0,
67 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
68 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
69 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
70 RID_NORETURN, RID_ATOMIC,
71
72 /* C extensions */
73 RID_COMPLEX, RID_THREAD, RID_SAT,
74
75 /* C++ */
76 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
77
78 /* ObjC ("PQ" reserved words - they do not appear after a '@' and
79 are keywords only in specific contexts) */
80 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
81
82 /* ObjC ("PATTR" reserved words - they do not appear after a '@'
83 and are keywords only as property attributes) */
84 RID_GETTER, RID_SETTER,
85 RID_READONLY, RID_READWRITE,
86 RID_ASSIGN, RID_RETAIN, RID_COPY,
87 RID_NONATOMIC,
88
89 /* C (reserved and imaginary types not implemented, so any use is a
90 syntax error) */
91 RID_IMAGINARY,
92
93 /* C */
94 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
95 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
96 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
97 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
98 RID_SIZEOF,
99
100 /* C extensions */
101 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
102 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
103 RID_TYPES_COMPATIBLE_P, RID_BUILTIN_COMPLEX, RID_BUILTIN_SHUFFLE,
104 RID_BUILTIN_TGMATH,
105 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
106
107 /* TS 18661-3 keywords, in the same sequence as the TI_* values. */
108 RID_FLOAT16,
109 RID_FLOATN_NX_FIRST = RID_FLOAT16,
110 RID_FLOAT32,
111 RID_FLOAT64,
112 RID_FLOAT128,
113 RID_FLOAT32X,
114 RID_FLOAT64X,
115 RID_FLOAT128X,
116#define CASE_RID_FLOATN_NX \
117 case RID_FLOAT16: case RID_FLOAT32: case RID_FLOAT64: case RID_FLOAT128: \
118 case RID_FLOAT32X: case RID_FLOAT64X: case RID_FLOAT128X
119
120 RID_FRACT, RID_ACCUM, RID_AUTO_TYPE, RID_BUILTIN_CALL_WITH_STATIC_CHAIN,
121
122 /* "__GIMPLE", for the GIMPLE-parsing extension to the C frontend. */
123 RID_GIMPLE,
124
125 /* "__PHI", for parsing PHI function in GIMPLE FE. */
126 RID_PHI,
127
128 /* "__RTL", for the RTL-parsing extension to the C frontend. */
129 RID_RTL,
130
131 /* C11 */
132 RID_ALIGNAS, RID_GENERIC,
133
134 /* This means to warn that this is a C++ keyword, and then treat it
135 as a normal identifier. */
136 RID_CXX_COMPAT_WARN,
137
138 /* GNU transactional memory extension */
139 RID_TRANSACTION_ATOMIC, RID_TRANSACTION_RELAXED, RID_TRANSACTION_CANCEL,
140
141 /* Too many ways of getting the name of a function as a string */
142 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
143
144 /* C++ (some of these are keywords in Objective-C as well, but only
145 if they appear after a '@') */
146 RID_BOOL, RID_WCHAR, RID_CLASS,
147 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
148 RID_TEMPLATE, RID_NULL, RID_CATCH,
149 RID_DELETE, RID_FALSE, RID_NAMESPACE,
150 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
151 RID_THIS, RID_THROW, RID_TRUE,
152 RID_TRY, RID_TYPENAME, RID_TYPEID,
153 RID_USING, RID_CHAR16, RID_CHAR32,
154
155 /* casts */
156 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
157
158 /* C++ extensions */
159 RID_ADDRESSOF, RID_BASES,
160 RID_BUILTIN_LAUNDER, RID_DIRECT_BASES,
161 RID_HAS_NOTHROW_ASSIGN, RID_HAS_NOTHROW_CONSTRUCTOR,
162 RID_HAS_NOTHROW_COPY, RID_HAS_TRIVIAL_ASSIGN,
163 RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
164 RID_HAS_TRIVIAL_DESTRUCTOR, RID_HAS_UNIQUE_OBJ_REPRESENTATIONS,
165 RID_HAS_VIRTUAL_DESTRUCTOR,
166 RID_IS_ABSTRACT, RID_IS_AGGREGATE,
167 RID_IS_BASE_OF, RID_IS_CLASS,
168 RID_IS_EMPTY, RID_IS_ENUM,
169 RID_IS_FINAL, RID_IS_LITERAL_TYPE,
170 RID_IS_POD, RID_IS_POLYMORPHIC,
171 RID_IS_SAME_AS,
172 RID_IS_STD_LAYOUT, RID_IS_TRIVIAL,
173 RID_IS_TRIVIALLY_ASSIGNABLE, RID_IS_TRIVIALLY_CONSTRUCTIBLE,
174 RID_IS_TRIVIALLY_COPYABLE,
175 RID_IS_UNION, RID_UNDERLYING_TYPE,
176 RID_IS_ASSIGNABLE, RID_IS_CONSTRUCTIBLE,
177
178 /* C++11 */
179 RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
180
181 /* C++ concepts */
182 RID_CONCEPT, RID_REQUIRES,
183
184 /* C++ transactional memory. */
185 RID_ATOMIC_NOEXCEPT, RID_ATOMIC_CANCEL, RID_SYNCHRONIZED,
186
187 /* Objective-C ("AT" reserved words - they are only keywords when
188 they follow '@') */
189 RID_AT_ENCODE, RID_AT_END,
190 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
191 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, RID_AT_PACKAGE,
192 RID_AT_PROTOCOL, RID_AT_SELECTOR,
193 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
194 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
195 RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
196 RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
197 RID_AT_INTERFACE,
198 RID_AT_IMPLEMENTATION,
199
200 /* Named address support, mapping the keyword to a particular named address
201 number. Named address space 0 is reserved for the generic address. If
202 there are more than 254 named addresses, the addr_space_t type will need
203 to be grown from an unsigned char to unsigned short. */
204 RID_ADDR_SPACE_0, /* generic address */
205 RID_ADDR_SPACE_1,
206 RID_ADDR_SPACE_2,
207 RID_ADDR_SPACE_3,
208 RID_ADDR_SPACE_4,
209 RID_ADDR_SPACE_5,
210 RID_ADDR_SPACE_6,
211 RID_ADDR_SPACE_7,
212 RID_ADDR_SPACE_8,
213 RID_ADDR_SPACE_9,
214 RID_ADDR_SPACE_10,
215 RID_ADDR_SPACE_11,
216 RID_ADDR_SPACE_12,
217 RID_ADDR_SPACE_13,
218 RID_ADDR_SPACE_14,
219 RID_ADDR_SPACE_15,
220
221 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
222 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
223
224 /* __intN keywords. The _N_M here doesn't correspond to the intN
225 in the keyword; use the bitsize in int_n_t_data_t[M] for that.
226 For example, if int_n_t_data_t[0].bitsize is 13, then RID_INT_N_0
227 is for __int13. */
228
229 /* Note that the range to use is RID_FIRST_INT_N through
230 RID_FIRST_INT_N + NUM_INT_N_ENTS - 1 and c-parser.c has a list of
231 all RID_INT_N_* in a case statement. */
232
233 RID_INT_N_0,
234 RID_INT_N_1,
235 RID_INT_N_2,
236 RID_INT_N_3,
237
238 RID_FIRST_INT_N = RID_INT_N_0,
239 RID_LAST_INT_N = RID_INT_N_3,
240
241 RID_MAX,
242
243 RID_FIRST_MODIFIER = RID_STATIC,
244 RID_LAST_MODIFIER = RID_ONEWAY,
245
246 RID_FIRST_CXX11 = RID_CONSTEXPR,
247 RID_LAST_CXX11 = RID_STATIC_ASSERT,
248 RID_FIRST_AT = RID_AT_ENCODE,
249 RID_LAST_AT = RID_AT_IMPLEMENTATION,
250 RID_FIRST_PQ = RID_IN,
251 RID_LAST_PQ = RID_ONEWAY,
252 RID_FIRST_PATTR = RID_GETTER,
253 RID_LAST_PATTR = RID_NONATOMIC
254};
255
256#define OBJC_IS_AT_KEYWORD(rid) \
257 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
258 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
259
260#define OBJC_IS_PQ_KEYWORD(rid) \
261 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
262 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
263
264#define OBJC_IS_PATTR_KEYWORD(rid) \
265 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
266 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
267
268/* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
269 'class') which are shared in a subtle way between Objective-C and
270 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
271 finds '@' followed by one of these identifiers (eg, '@class'), it
272 recognizes the whole as an Objective-C keyword. If the identifier
273 is found elsewhere, it follows the rules of the C/C++ language.
274 */
275#define OBJC_IS_CXX_KEYWORD(rid) \
276 (rid == RID_CLASS || rid == RID_SYNCHRONIZED \
277 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
278 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
279
280/* The elements of `ridpointers' are identifier nodes for the reserved
281 type names and storage classes. It is indexed by a RID_... value. */
282extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
283
284/* Standard named or nameless data types of the C compiler. */
285
286enum c_tree_index
287{
288 CTI_CHAR16_TYPE,
289 CTI_CHAR32_TYPE,
290 CTI_WCHAR_TYPE,
291 CTI_UNDERLYING_WCHAR_TYPE,
292 CTI_WINT_TYPE,
293 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
294 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
295 CTI_INTMAX_TYPE,
296 CTI_UINTMAX_TYPE,
297 CTI_WIDEST_INT_LIT_TYPE,
298 CTI_WIDEST_UINT_LIT_TYPE,
299
300 /* Types for <stdint.h>, that may not be defined on all
301 targets. */
302 CTI_SIG_ATOMIC_TYPE,
303 CTI_INT8_TYPE,
304 CTI_INT16_TYPE,
305 CTI_INT32_TYPE,
306 CTI_INT64_TYPE,
307 CTI_UINT8_TYPE,
308 CTI_UINT16_TYPE,
309 CTI_UINT32_TYPE,
310 CTI_UINT64_TYPE,
311 CTI_INT_LEAST8_TYPE,
312 CTI_INT_LEAST16_TYPE,
313 CTI_INT_LEAST32_TYPE,
314 CTI_INT_LEAST64_TYPE,
315 CTI_UINT_LEAST8_TYPE,
316 CTI_UINT_LEAST16_TYPE,
317 CTI_UINT_LEAST32_TYPE,
318 CTI_UINT_LEAST64_TYPE,
319 CTI_INT_FAST8_TYPE,
320 CTI_INT_FAST16_TYPE,
321 CTI_INT_FAST32_TYPE,
322 CTI_INT_FAST64_TYPE,
323 CTI_UINT_FAST8_TYPE,
324 CTI_UINT_FAST16_TYPE,
325 CTI_UINT_FAST32_TYPE,
326 CTI_UINT_FAST64_TYPE,
327 CTI_INTPTR_TYPE,
328 CTI_UINTPTR_TYPE,
329
330 CTI_CHAR_ARRAY_TYPE,
331 CTI_CHAR16_ARRAY_TYPE,
332 CTI_CHAR32_ARRAY_TYPE,
333 CTI_WCHAR_ARRAY_TYPE,
334 CTI_STRING_TYPE,
335 CTI_CONST_STRING_TYPE,
336
337 /* Type for boolean expressions (bool in C++, int in C). */
338 CTI_TRUTHVALUE_TYPE,
339 CTI_TRUTHVALUE_TRUE,
340 CTI_TRUTHVALUE_FALSE,
341
342 CTI_DEFAULT_FUNCTION_TYPE,
343
344 /* These are not types, but we have to look them up all the time. */
345 CTI_FUNCTION_NAME_DECL,
346 CTI_PRETTY_FUNCTION_NAME_DECL,
347 CTI_C99_FUNCTION_NAME_DECL,
348 CTI_SAVED_FUNCTION_NAME_DECLS,
349
350 CTI_NULL,
351
352 CTI_MAX
353};
354
355#define C_CPP_HASHNODE(id) \
356 (&(((struct c_common_identifier *) (id))->node))
357#define C_RID_CODE(id) \
358 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
359#define C_SET_RID_CODE(id, code) \
360 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
361
362/* Identifier part common to the C front ends. Inherits from
363 tree_identifier, despite appearances. */
364struct GTY(()) c_common_identifier {
365 struct tree_common common;
366 struct cpp_hashnode node;
367};
368
369/* An entry in the reserved keyword table. */
370
371struct c_common_resword
372{
373 const char *const word;
374 ENUM_BITFIELD(rid) const rid : 16;
375 const unsigned int disable : 16;
376};
377
378/* Mode used to build pointers (VOIDmode means ptr_mode). */
379
380extern machine_mode c_default_pointer_mode;
381
382/* Extra cpp_ttype values for C++. */
383
384/* A token type for template-ids. If a template-id is processed while
385 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
386 the value of the CPP_TEMPLATE_ID is whatever was returned by
387 cp_parser_template_id. */
388#define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
389
390/* A token type for nested-name-specifiers. If a
391 nested-name-specifier is processed while parsing tentatively, it is
392 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
393 CPP_NESTED_NAME_SPECIFIER is whatever was returned by
394 cp_parser_nested_name_specifier_opt. */
395#define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
396
397/* A token type for pre-parsed C++0x decltype. */
398#define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
399
400/* A token type for pre-parsed primary-expression (lambda- or statement-). */
401#define CPP_PREPARSED_EXPR ((enum cpp_ttype) (CPP_DECLTYPE + 1))
402
403/* The number of token types, including C++-specific ones. */
404#define N_CP_TTYPES ((int) (CPP_PREPARSED_EXPR + 1))
405
406/* Disable mask. Keywords are disabled if (reswords[i].disable &
407 mask) is _true_. Thus for keywords which are present in all
408 languages the disable field is zero. */
409
410#define D_CONLY 0x001 /* C only (not in C++). */
411#define D_CXXONLY 0x002 /* C++ only (not in C). */
412#define D_C99 0x004 /* In C, C99 only. */
413#define D_CXX11 0x008 /* In C++, C++11 only. */
414#define D_EXT 0x010 /* GCC extension. */
415#define D_EXT89 0x020 /* GCC extension incorporated in C99. */
416#define D_ASM 0x040 /* Disabled by -fno-asm. */
417#define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
418#define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
419#define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
420#define D_CXX_CONCEPTS 0x400 /* In C++, only with concepts. */
421#define D_TRANSMEM 0X800 /* C++ transactional memory TS. */
422
423#define D_CXX_CONCEPTS_FLAGS D_CXXONLY | D_CXX_CONCEPTS
424
425/* The reserved keyword table. */
426extern const struct c_common_resword c_common_reswords[];
427
428/* The number of items in the reserved keyword table. */
429extern const unsigned int num_c_common_reswords;
430
431#define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
432#define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
433#define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
434#define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
435#define wint_type_node c_global_trees[CTI_WINT_TYPE]
436#define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
437#define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
438#define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
439#define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
440#define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
441#define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
442
443#define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
444#define int8_type_node c_global_trees[CTI_INT8_TYPE]
445#define int16_type_node c_global_trees[CTI_INT16_TYPE]
446#define int32_type_node c_global_trees[CTI_INT32_TYPE]
447#define int64_type_node c_global_trees[CTI_INT64_TYPE]
448#define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
449#define c_uint16_type_node c_global_trees[CTI_UINT16_TYPE]
450#define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
451#define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
452#define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
453#define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
454#define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
455#define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
456#define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
457#define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
458#define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
459#define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
460#define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
461#define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
462#define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
463#define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
464#define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
465#define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
466#define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
467#define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
468#define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
469#define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
470
471#define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
472#define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
473#define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
474
475#define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
476#define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
477#define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
478#define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
479#define string_type_node c_global_trees[CTI_STRING_TYPE]
480#define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
481
482#define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
483
484#define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
485#define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
486#define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
487#define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
488
489/* The node for C++ `__null'. */
490#define null_node c_global_trees[CTI_NULL]
491
492extern GTY(()) tree c_global_trees[CTI_MAX];
493
494/* Mark which labels are explicitly declared.
495 These may be shadowed, and may be referenced from nested functions. */
496#define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
497
498enum c_language_kind
499{
500 clk_c = 0, /* C90, C94, C99 or C11 */
501 clk_objc = 1, /* clk_c with ObjC features. */
502 clk_cxx = 2, /* ANSI/ISO C++ */
503 clk_objcxx = 3 /* clk_cxx with ObjC features. */
504};
505
506/* To test for a specific language use c_language, defined by each
507 front end. For "ObjC features" or "not C++" use the macros. */
508extern c_language_kind c_language;
509
510#define c_dialect_cxx() ((c_language & clk_cxx) != 0)
511#define c_dialect_objc() ((c_language & clk_objc) != 0)
512
513/* The various name of operator that appears in error messages. */
514enum ref_operator {
515 /* NULL */
516 RO_NULL,
517 /* array indexing */
518 RO_ARRAY_INDEXING,
519 /* unary * */
520 RO_UNARY_STAR,
521 /* -> */
522 RO_ARROW,
523 /* implicit conversion */
524 RO_IMPLICIT_CONVERSION,
525 /* ->* */
526 RO_ARROW_STAR
527};
528
529/* Information about a statement tree. */
530
531struct GTY(()) stmt_tree_s {
532 /* A stack of statement lists being collected. */
533 vec<tree, va_gc> *x_cur_stmt_list;
534
535 /* In C++, Nonzero if we should treat statements as full
536 expressions. In particular, this variable is non-zero if at the
537 end of a statement we should destroy any temporaries created
538 during that statement. Similarly, if, at the end of a block, we
539 should destroy any local variables in this block. Normally, this
540 variable is nonzero, since those are the normal semantics of
541 C++.
542
543 This flag has no effect in C. */
544 int stmts_are_full_exprs_p;
545};
546
547typedef struct stmt_tree_s *stmt_tree;
548
549/* Global state pertinent to the current function. Some C dialects
550 extend this structure with additional fields. */
551
552struct GTY(()) c_language_function {
553 /* While we are parsing the function, this contains information
554 about the statement-tree that we are building. */
555 struct stmt_tree_s x_stmt_tree;
556
557 /* Vector of locally defined typedefs, for
558 -Wunused-local-typedefs. */
559 vec<tree, va_gc> *local_typedefs;
560};
561
562#define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
563
564/* When building a statement-tree, this is the current statement list
565 being collected. */
566#define cur_stmt_list (stmt_list_stack->last ())
567
568#define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
569
570/* Language-specific hooks. */
571
572/* If non-NULL, this function is called after a precompile header file
573 is loaded. */
574extern void (*lang_post_pch_load) (void);
575
576extern void push_file_scope (void);
577extern void pop_file_scope (void);
578extern stmt_tree current_stmt_tree (void);
579extern tree push_stmt_list (void);
580extern tree pop_stmt_list (tree);
581extern tree add_stmt (tree);
582extern void push_cleanup (tree, tree, bool);
583
584extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
585 location_t, tree, tree);
586extern tree build_indirect_ref (location_t, tree, ref_operator);
587
588extern bool has_c_linkage (const_tree decl);
589extern bool c_decl_implicit (const_tree);
590
591/* Switches common to the C front ends. */
592
593/* Nonzero means don't output line number information. */
594
595extern char flag_no_line_commands;
596
597/* Nonzero causes -E output not to be done, but directives such as
598 #define that have side effects are still obeyed. */
599
600extern char flag_no_output;
601
602/* Nonzero means dump macros in some fashion; contains the 'D', 'M',
603 'N' or 'U' of the command line switch. */
604
605extern char flag_dump_macros;
606
607/* Nonzero means pass #include lines through to the output. */
608
609extern char flag_dump_includes;
610
611/* Nonzero means process PCH files while preprocessing. */
612
613extern bool flag_pch_preprocess;
614
615/* The file name to which we should write a precompiled header, or
616 NULL if no header will be written in this compile. */
617
618extern const char *pch_file;
619
620/* Nonzero if an ISO standard was selected. It rejects macros in the
621 user's namespace. */
622
623extern int flag_iso;
624
625/* C/ObjC language option variables. */
626
627
628/* Nonzero means allow type mismatches in conditional expressions;
629 just make their values `void'. */
630
631extern int flag_cond_mismatch;
632
633/* Nonzero means enable C89 Amendment 1 features. */
634
635extern int flag_isoc94;
636
637/* Nonzero means use the ISO C99 (or C11) dialect of C. */
638
639extern int flag_isoc99;
640
641/* Nonzero means use the ISO C11 dialect of C. */
642
643extern int flag_isoc11;
644
645/* Nonzero means that we have builtin functions, and main is an int. */
646
647extern int flag_hosted;
648
649/* ObjC language option variables. */
650
651
652/* Tells the compiler that this is a special run. Do not perform any
653 compiling, instead we are to test some platform dependent features
654 and output a C header file with appropriate definitions. */
655
656extern int print_struct_values;
657
658/* Tells the compiler what is the constant string class for ObjC. */
659
660extern const char *constant_string_class_name;
661
662
663/* C++ language option variables. */
664
665/* The reference version of the ABI for -Wabi. */
666
667extern int warn_abi_version;
668
669/* Return TRUE if one of {flag_abi_version,flag_abi_compat_version} is
670 less than N and the other is at least N. */
671#define abi_compat_version_crosses(N) \
672 (abi_version_at_least(N) \
673 != (flag_abi_compat_version == 0 \
674 || flag_abi_compat_version >= (N)))
675
676/* Return TRUE if one of {flag_abi_version,warn_abi_version} is
677 less than N and the other is at least N, for use by -Wabi. */
678#define abi_version_crosses(N) \
679 (abi_version_at_least(N) \
680 != (warn_abi_version == 0 \
681 || warn_abi_version >= (N)))
682
683/* Nonzero means generate separate instantiation control files and
684 juggle them at link time. */
685
686extern int flag_use_repository;
687
688/* The supported C++ dialects. */
689
690enum cxx_dialect {
691 cxx_unset,
692 /* C++98 with TC1 */
693 cxx98,
694 cxx03 = cxx98,
695 /* C++11 */
696 cxx0x,
697 cxx11 = cxx0x,
698 /* C++14 */
699 cxx14,
700 /* C++17 */
701 cxx17,
702 /* C++2a (C++20?) */
703 cxx2a
704};
705
706/* The C++ dialect being used. C++98 is the default. */
707extern enum cxx_dialect cxx_dialect;
708
709/* Maximum template instantiation depth. This limit is rather
710 arbitrary, but it exists to limit the time it takes to notice
711 excessively recursive template instantiations. */
712
713extern int max_tinst_depth;
714
715/* Nonzero means that we should not issue warnings about problems that
716 occur when the code is executed, because the code being processed
717 is not expected to be executed. This is set during parsing. This
718 is used for cases like sizeof() and "0 ? a : b". This is a count,
719 not a bool, because unexecuted expressions can nest. */
720
721extern int c_inhibit_evaluation_warnings;
722
723/* Whether lexing has been completed, so subsequent preprocessor
724 errors should use the compiler's input_location. */
725
726extern bool done_lexing;
727
728/* C types are partitioned into three subsets: object, function, and
729 incomplete types. */
730#define C_TYPE_OBJECT_P(type) \
731 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
732
733#define C_TYPE_INCOMPLETE_P(type) \
734 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
735
736#define C_TYPE_FUNCTION_P(type) \
737 (TREE_CODE (type) == FUNCTION_TYPE)
738
739/* For convenience we define a single macro to identify the class of
740 object or incomplete types. */
741#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
742 (!C_TYPE_FUNCTION_P (type))
743
744struct visibility_flags
745{
746 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
747 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
748};
749
750/* These enumerators are possible types of unsafe conversions. */
751enum conversion_safety {
752 /* The conversion is safe. */
753 SAFE_CONVERSION = 0,
754 /* Another type of conversion with problems. */
755 UNSAFE_OTHER,
756 /* Conversion between signed and unsigned integers
757 which are all warned about immediately, so this is unused. */
758 UNSAFE_SIGN,
759 /* Conversions that reduce the precision of reals including conversions
760 from reals to integers. */
761 UNSAFE_REAL,
762 /* Conversions from complex to reals or integers, that discard imaginary
763 component. */
764 UNSAFE_IMAGINARY
765};
766
767/* Global visibility options. */
768extern struct visibility_flags visibility_options;
769
770/* Attribute table common to the C front ends. */
771extern const struct attribute_spec c_common_attribute_table[];
772extern const struct attribute_spec c_common_format_attribute_table[];
773
774/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
775 ID is the identifier to use, NAME is the string.
776 TYPE_DEP indicates whether it depends on type of the function or not
777 (i.e. __PRETTY_FUNCTION__). */
778
779extern tree (*make_fname_decl) (location_t, tree, int);
780
781/* In c-decl.c and cp/tree.c. FIXME. */
782extern void c_register_addr_space (const char *str, addr_space_t as);
783
784/* In c-common.c. */
785extern bool in_late_binary_op;
786extern const char *c_addr_space_name (addr_space_t as);
787extern tree identifier_global_value (tree);
788extern tree c_linkage_bindings (tree);
789extern void record_builtin_type (enum rid, const char *, tree);
790extern tree build_void_list_node (void);
791extern void start_fname_decls (void);
792extern void finish_fname_decls (void);
793extern const char *fname_as_string (int);
794extern tree fname_decl (location_t, unsigned, tree);
795
796extern int check_user_alignment (const_tree, bool);
797extern bool check_function_arguments (location_t loc, const_tree, const_tree,
798 int, tree *, vec<location_t> *);
799extern void check_function_arguments_recurse (void (*)
800 (void *, tree,
801 unsigned HOST_WIDE_INT),
802 void *, tree,
803 unsigned HOST_WIDE_INT);
804extern bool check_builtin_function_arguments (location_t, vec<location_t>,
805 tree, int, tree *);
806extern void check_function_format (tree, int, tree *, vec<location_t> *);
807extern bool attribute_fallthrough_p (tree);
808extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
809extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
810extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
811 const struct cl_option_handlers *);
812extern bool default_handle_c_option (size_t, const char *, int);
813extern tree c_common_type_for_mode (machine_mode, int);
814extern tree c_common_type_for_size (unsigned int, int);
815extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
816 int, int);
817extern tree c_common_unsigned_type (tree);
818extern tree c_common_signed_type (tree);
819extern tree c_common_signed_or_unsigned_type (int, tree);
820extern void c_common_init_ts (void);
821extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
822extern enum conversion_safety unsafe_conversion_p (location_t, tree, tree, tree,
823 bool);
824extern bool decl_with_nonnull_addr_p (const_tree);
825extern tree c_fully_fold (tree, bool, bool *, bool = false);
826extern tree c_wrap_maybe_const (tree, bool);
827extern tree c_common_truthvalue_conversion (location_t, tree);
828extern void c_apply_type_quals_to_decl (int, tree);
829extern tree c_sizeof_or_alignof_type (location_t, tree, bool, bool, int);
830extern tree c_alignof_expr (location_t, tree);
831/* Print an error message for invalid operands to arith operation CODE.
832 NOP_EXPR is used as a special case (see truthvalue_conversion). */
833extern void binary_op_error (rich_location *, enum tree_code, tree, tree);
834extern tree fix_string_type (tree);
835extern tree convert_and_check (location_t, tree, tree);
836extern bool c_determine_visibility (tree);
837extern bool vector_types_compatible_elements_p (tree, tree);
838extern void mark_valid_location_for_stdc_pragma (bool);
839extern bool valid_location_for_stdc_pragma_p (void);
840extern void set_float_const_decimal64 (void);
841extern void clear_float_const_decimal64 (void);
842extern bool float_const_decimal64_p (void);
843
844extern bool keyword_begins_type_specifier (enum rid);
845extern bool keyword_is_storage_class_specifier (enum rid);
846extern bool keyword_is_type_qualifier (enum rid);
847extern bool keyword_is_decl_specifier (enum rid);
848extern unsigned max_align_t_align (void);
849extern bool cxx_fundamental_alignment_p (unsigned);
850extern bool pointer_to_zero_sized_aggr_p (tree);
851extern bool bool_promoted_to_int_p (tree);
852extern tree fold_for_warn (tree);
853extern tree c_common_get_narrower (tree, int *);
854extern bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *);
855
856#define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, false, 1)
857#define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, false, 1)
858
859/* Subroutine of build_binary_op, used for certain operations. */
860extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
861
862/* Subroutine of build_binary_op, used for comparison operations.
863 See if the operands have both been converted from subword integer types
864 and, if so, perhaps change them both back to their original type. */
865extern tree shorten_compare (location_t, tree *, tree *, tree *,
866 enum tree_code *);
867
868extern tree pointer_int_sum (location_t, enum tree_code, tree, tree,
869 bool = true);
870
871/* Add qualifiers to a type, in the fashion for C. */
872extern tree c_build_qualified_type (tree, int, tree = NULL_TREE, size_t = 0);
873
874/* Build tree nodes and builtin functions common to both C and C++ language
875 frontends. */
876extern void c_common_nodes_and_builtins (void);
877
878extern void disable_builtin_function (const char *);
879
880extern void set_compound_literal_name (tree decl);
881
882extern tree build_va_arg (location_t, tree, tree);
883
884extern const unsigned int c_family_lang_mask;
885extern unsigned int c_common_option_lang_mask (void);
886extern void c_common_diagnostics_set_defaults (diagnostic_context *);
887extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
888extern void c_common_init_options_struct (struct gcc_options *);
889extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
890extern bool c_common_post_options (const char **);
891extern bool c_common_init (void);
892extern void c_common_finish (void);
893extern void c_common_parse_file (void);
894extern FILE *get_dump_info (int, dump_flags_t *);
895extern alias_set_type c_common_get_alias_set (tree);
896extern void c_register_builtin_type (tree, const char*);
897extern bool c_promoting_integer_type_p (const_tree);
898extern bool self_promoting_args_p (const_tree);
899extern tree strip_pointer_operator (tree);
900extern tree strip_pointer_or_array_types (tree);
901extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
902
903/* This is the basic parsing function. */
904extern void c_parse_file (void);
905
906extern void c_parse_final_cleanups (void);
907
908/* These macros provide convenient access to the various _STMT nodes. */
909
910/* Nonzero if a given STATEMENT_LIST represents the outermost binding
911 if a statement expression. */
912#define STATEMENT_LIST_STMT_EXPR(NODE) \
913 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
914
915/* Nonzero if a label has been added to the statement list. */
916#define STATEMENT_LIST_HAS_LABEL(NODE) \
917 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
918
919/* C_MAYBE_CONST_EXPR accessors. */
920#define C_MAYBE_CONST_EXPR_PRE(NODE) \
921 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
922#define C_MAYBE_CONST_EXPR_EXPR(NODE) \
923 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
924#define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
925 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
926#define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
927 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
928#define EXPR_INT_CONST_OPERANDS(EXPR) \
929 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
930 && (TREE_CODE (EXPR) == INTEGER_CST \
931 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
932 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
933
934/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
935#define DECL_C_BIT_FIELD(NODE) \
936 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
937#define SET_DECL_C_BIT_FIELD(NODE) \
938 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
939#define CLEAR_DECL_C_BIT_FIELD(NODE) \
940 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
941
942extern tree do_case (location_t, tree, tree);
943extern tree build_stmt (location_t, enum tree_code, ...);
944extern tree build_real_imag_expr (location_t, enum tree_code, tree);
945
946/* These functions must be defined by each front-end which implements
947 a variant of the C language. They are used in c-common.c. */
948
949extern tree build_unary_op (location_t, enum tree_code, tree, bool);
950extern tree build_binary_op (location_t, enum tree_code, tree, tree, bool);
951extern tree perform_integral_promotions (tree);
952
953/* These functions must be defined by each front-end which implements
954 a variant of the C language. They are used by port files. */
955
956extern tree default_conversion (tree);
957
958/* Given two integer or real types, return the type for their sum.
959 Given two compatible ANSI C types, returns the merged type. */
960
961extern tree common_type (tree, tree);
962
963extern tree decl_constant_value (tree);
964
965/* Handle increment and decrement of boolean types. */
966extern tree boolean_increment (enum tree_code, tree);
967
968extern int case_compare (splay_tree_key, splay_tree_key);
969
970extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree,
971 bool *);
972extern bool c_switch_covers_all_cases_p (splay_tree, tree);
973
974extern tree build_function_call (location_t, tree, tree);
975
976extern tree build_function_call_vec (location_t, vec<location_t>, tree,
977 vec<tree, va_gc> *, vec<tree, va_gc> *);
978
979extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
980
981extern tree finish_label_address_expr (tree, location_t);
982
983/* Same function prototype, but the C and C++ front ends have
984 different implementations. Used in c-common.c. */
985extern tree lookup_label (tree);
986extern tree lookup_name (tree);
987extern bool lvalue_p (const_tree);
988
989extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
990extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
991extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true);
992
993extern void init_c_lex (void);
994
995extern void c_cpp_builtins (cpp_reader *);
996extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
997extern bool c_cpp_error (cpp_reader *, int, int, rich_location *,
998 const char *, va_list *)
999 ATTRIBUTE_GCC_DIAG(5,0);
1000extern int c_common_has_attribute (cpp_reader *);
1001
1002extern bool parse_optimize_options (tree, bool);
1003
1004/* Positive if an implicit `extern "C"' scope has just been entered;
1005 negative if such a scope has just been exited. */
1006extern GTY(()) int pending_lang_change;
1007
1008/* Information recorded about each file examined during compilation. */
1009
1010struct c_fileinfo
1011{
1012 int time; /* Time spent in the file. */
1013
1014 /* Flags used only by C++.
1015 INTERFACE_ONLY nonzero means that we are in an "interface" section
1016 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
1017 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
1018 INTERFACE_ONLY is zero, it means that we are responsible for
1019 exporting definitions that others might need. */
1020 short interface_only;
1021 short interface_unknown;
1022};
1023
1024struct c_fileinfo *get_fileinfo (const char *);
1025extern void dump_time_statistics (void);
1026
1027extern bool c_dump_tree (void *, tree);
1028
1029extern void verify_sequence_points (tree);
1030
1031extern tree fold_offsetof_1 (tree, tree_code ctx = ERROR_MARK);
1032extern tree fold_offsetof (tree);
1033
1034extern int complete_array_type (tree *, tree, bool);
1035
1036extern tree builtin_type_for_size (int, bool);
1037
1038extern void c_common_mark_addressable_vec (tree);
1039
1040extern void set_underlying_type (tree);
1041extern void record_types_used_by_current_var_decl (tree);
1042extern vec<tree, va_gc> *make_tree_vector (void);
1043extern void release_tree_vector (vec<tree, va_gc> *);
1044extern vec<tree, va_gc> *make_tree_vector_single (tree);
1045extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1046extern vec<tree, va_gc> *make_tree_vector_from_ctor (tree);
1047extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1048
1049/* Used for communication between c_common_type_for_mode and
1050 c_register_builtin_type. */
1051extern GTY(()) tree registered_builtin_types;
1052
1053/* Read SOURCE_DATE_EPOCH from environment to have a deterministic
1054 timestamp to replace embedded current dates to get reproducible
1055 results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */
1056extern time_t cb_get_source_date_epoch (cpp_reader *pfile);
1057
1058/* The value (as a unix timestamp) corresponds to date
1059 "Dec 31 9999 23:59:59 UTC", which is the latest date that __DATE__ and
1060 __TIME__ can store. */
1061#define MAX_SOURCE_DATE_EPOCH HOST_WIDE_INT_C (253402300799)
1062
1063/* Callback for libcpp for offering spelling suggestions for misspelled
1064 directives. */
1065extern const char *cb_get_suggestion (cpp_reader *, const char *,
1066 const char *const *);
1067
1068extern GTY(()) string_concat_db *g_string_concat_db;
1069
1070class substring_loc;
1071extern const char *c_get_substring_location (const substring_loc &substr_loc,
1072 location_t *out_loc);
1073
1074/* In c-gimplify.c */
1075extern void c_genericize (tree);
1076extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1077extern tree c_build_bind_expr (location_t, tree, tree);
1078
1079/* In c-lex.c. */
1080extern enum cpp_ttype
1081conflict_marker_get_final_tok_kind (enum cpp_ttype tok1_kind);
1082
1083/* In c-pch.c */
1084extern void pch_init (void);
1085extern void pch_cpp_save_state (void);
1086extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1087extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1088 const char *orig);
1089extern void c_common_write_pch (void);
1090extern void c_common_no_more_pch (void);
1091extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1092
1093/* In *-checksum.c */
1094extern const unsigned char executable_checksum[16];
1095
1096/* In c-cppbuiltin.c */
1097extern void builtin_define_std (const char *macro);
1098extern void builtin_define_with_value (const char *, const char *, int);
1099extern void builtin_define_with_int_value (const char *, HOST_WIDE_INT);
1100extern void builtin_define_type_sizeof (const char *, tree);
1101extern void c_stddef_cpp_builtins (void);
1102extern void fe_file_change (const line_map_ordinary *);
1103extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char,
1104 rich_location *richloc);
1105
1106/* In c-ppoutput.c */
1107extern void init_pp_output (FILE *);
1108extern void preprocess_file (cpp_reader *);
1109extern void pp_file_change (const line_map_ordinary *);
1110extern void pp_dir_change (cpp_reader *, const char *);
1111extern bool check_missing_format_attribute (tree, tree);
1112
1113/* In c-omp.c */
1114struct omp_clause_mask
1115{
1116 inline omp_clause_mask ();
1117 inline omp_clause_mask (uint64_t l);
1118 inline omp_clause_mask (uint64_t l, uint64_t h);
1119 inline omp_clause_mask &operator &= (omp_clause_mask);
1120 inline omp_clause_mask &operator |= (omp_clause_mask);
1121 inline omp_clause_mask operator ~ () const;
1122 inline omp_clause_mask operator & (omp_clause_mask) const;
1123 inline omp_clause_mask operator | (omp_clause_mask) const;
1124 inline omp_clause_mask operator >> (int);
1125 inline omp_clause_mask operator << (int);
1126 inline bool operator == (omp_clause_mask) const;
1127 inline bool operator != (omp_clause_mask) const;
1128 uint64_t low, high;
1129};
1130
1131inline
1132omp_clause_mask::omp_clause_mask ()
1133{
1134}
1135
1136inline
1137omp_clause_mask::omp_clause_mask (uint64_t l)
1138: low (l), high (0)
1139{
1140}
1141
1142inline
1143omp_clause_mask::omp_clause_mask (uint64_t l, uint64_t h)
1144: low (l), high (h)
1145{
1146}
1147
1148inline omp_clause_mask &
1149omp_clause_mask::operator &= (omp_clause_mask b)
1150{
1151 low &= b.low;
1152 high &= b.high;
1153 return *this;
1154}
1155
1156inline omp_clause_mask &
1157omp_clause_mask::operator |= (omp_clause_mask b)
1158{
1159 low |= b.low;
1160 high |= b.high;
1161 return *this;
1162}
1163
1164inline omp_clause_mask
1165omp_clause_mask::operator ~ () const
1166{
1167 omp_clause_mask ret (~low, ~high);
1168 return ret;
1169}
1170
1171inline omp_clause_mask
1172omp_clause_mask::operator | (omp_clause_mask b) const
1173{
1174 omp_clause_mask ret (low | b.low, high | b.high);
1175 return ret;
1176}
1177
1178inline omp_clause_mask
1179omp_clause_mask::operator & (omp_clause_mask b) const
1180{
1181 omp_clause_mask ret (low & b.low, high & b.high);
1182 return ret;
1183}
1184
1185inline omp_clause_mask
1186omp_clause_mask::operator << (int amount)
1187{
1188 omp_clause_mask ret;
1189 if (amount >= 64)
1190 {
1191 ret.low = 0;
1192 ret.high = low << (amount - 64);
1193 }
1194 else if (amount == 0)
1195 ret = *this;
1196 else
1197 {
1198 ret.low = low << amount;
1199 ret.high = (low >> (64 - amount)) | (high << amount);
1200 }
1201 return ret;
1202}
1203
1204inline omp_clause_mask
1205omp_clause_mask::operator >> (int amount)
1206{
1207 omp_clause_mask ret;
1208 if (amount >= 64)
1209 {
1210 ret.low = high >> (amount - 64);
1211 ret.high = 0;
1212 }
1213 else if (amount == 0)
1214 ret = *this;
1215 else
1216 {
1217 ret.low = (high << (64 - amount)) | (low >> amount);
1218 ret.high = high >> amount;
1219 }
1220 return ret;
1221}
1222
1223inline bool
1224omp_clause_mask::operator == (omp_clause_mask b) const
1225{
1226 return low == b.low && high == b.high;
1227}
1228
1229inline bool
1230omp_clause_mask::operator != (omp_clause_mask b) const
1231{
1232 return low != b.low || high != b.high;
1233}
1234
1235#define OMP_CLAUSE_MASK_1 omp_clause_mask (1)
1236
1237enum c_omp_clause_split
1238{
1239 C_OMP_CLAUSE_SPLIT_TARGET = 0,
1240 C_OMP_CLAUSE_SPLIT_TEAMS,
1241 C_OMP_CLAUSE_SPLIT_DISTRIBUTE,
1242 C_OMP_CLAUSE_SPLIT_PARALLEL,
1243 C_OMP_CLAUSE_SPLIT_FOR,
1244 C_OMP_CLAUSE_SPLIT_SIMD,
1245 C_OMP_CLAUSE_SPLIT_COUNT,
1246 C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR,
1247 C_OMP_CLAUSE_SPLIT_TASKLOOP = C_OMP_CLAUSE_SPLIT_FOR
1248};
1249
1250enum c_omp_region_type
1251{
1252 C_ORT_OMP = 1 << 0,
1253 C_ORT_ACC = 1 << 1,
1254 C_ORT_DECLARE_SIMD = 1 << 2,
1255 C_ORT_OMP_DECLARE_SIMD = C_ORT_OMP | C_ORT_DECLARE_SIMD
1256};
1257
1258extern tree c_finish_omp_master (location_t, tree);
1259extern tree c_finish_omp_taskgroup (location_t, tree);
1260extern tree c_finish_omp_critical (location_t, tree, tree, tree);
1261extern tree c_finish_omp_ordered (location_t, tree, tree);
1262extern void c_finish_omp_barrier (location_t);
1263extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1264 tree, tree, tree, tree, tree, bool, bool,
1265 bool = false);
1266extern void c_finish_omp_flush (location_t);
1267extern void c_finish_omp_taskwait (location_t);
1268extern void c_finish_omp_taskyield (location_t);
1269extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree,
1270 tree, tree, tree, tree);
1271extern bool c_omp_check_loop_iv (tree, tree, walk_tree_lh);
1272extern bool c_omp_check_loop_iv_exprs (location_t, tree, tree, tree, tree,
1273 walk_tree_lh);
1274extern tree c_finish_oacc_wait (location_t, tree, tree);
1275extern tree c_oacc_split_loop_clauses (tree, tree *, bool);
1276extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask,
1277 tree, tree *);
1278extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree);
1279extern void c_omp_declare_simd_clauses_to_decls (tree, tree);
1280extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1281
1282/* Return next tree in the chain for chain_next walking of tree nodes. */
1283static inline tree
1284c_tree_chain_next (tree t)
1285{
1286 /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1287 kind of object, never a long chain of nodes. Prefer
1288 TYPE_NEXT_VARIANT for types. */
1289 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1290 return TYPE_NEXT_VARIANT (t);
1291 /* Otherwise, if there is TREE_CHAIN, return it. */
1292 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1293 return TREE_CHAIN (t);
1294 return NULL;
1295}
1296
1297/* Mask used by tm_stmt_attr. */
1298#define TM_STMT_ATTR_OUTER 2
1299#define TM_STMT_ATTR_ATOMIC 4
1300#define TM_STMT_ATTR_RELAXED 8
1301
1302/* Mask used by tm_attr_to_mask and tm_mask_to_attr. Note that these
1303 are ordered specifically such that more restrictive attributes are
1304 at lower bit positions. This fact is known by the C++ tm attribute
1305 inheritance code such that least bit extraction (mask & -mask) results
1306 in the most restrictive attribute. */
1307#define TM_ATTR_SAFE 1
1308#define TM_ATTR_CALLABLE 2
1309#define TM_ATTR_PURE 4
1310#define TM_ATTR_IRREVOCABLE 8
1311#define TM_ATTR_MAY_CANCEL_OUTER 16
1312
1313/* A suffix-identifier value doublet that represents user-defined literals
1314 for C++-0x. */
1315enum overflow_type {
1316 OT_UNDERFLOW = -1,
1317 OT_NONE,
1318 OT_OVERFLOW
1319};
1320
1321struct GTY(()) tree_userdef_literal {
1322 struct tree_base base;
1323 tree suffix_id;
1324 tree value;
1325 tree num_string;
1326 enum overflow_type overflow;
1327};
1328
1329#define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1330 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1331
1332#define USERDEF_LITERAL_VALUE(NODE) \
1333 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1334
1335#define USERDEF_LITERAL_OVERFLOW(NODE) \
1336 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1337
1338#define USERDEF_LITERAL_NUM_STRING(NODE) \
1339 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1340
1341#define USERDEF_LITERAL_TYPE(NODE) \
1342 (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1343
1344extern tree build_userdef_literal (tree suffix_id, tree value,
1345 enum overflow_type overflow,
1346 tree num_string);
1347
1348extern bool convert_vector_to_array_for_subscript (location_t, tree *, tree);
1349
1350/* Possibe cases of scalar_to_vector conversion. */
1351enum stv_conv {
1352 stv_error, /* Error occurred. */
1353 stv_nothing, /* Nothing happened. */
1354 stv_firstarg, /* First argument must be expanded. */
1355 stv_secondarg /* Second argument must be expanded. */
1356};
1357
1358extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1359 tree op0, tree op1, bool);
1360
1361extern tree find_inv_trees (tree *, int *, void *);
1362extern tree replace_inv_trees (tree *, int *, void *);
1363
1364extern bool reject_gcc_builtin (const_tree, location_t = UNKNOWN_LOCATION);
1365extern bool valid_array_size_p (location_t, tree, tree);
1366
1367/* In c-warn.c. */
1368extern void constant_expression_warning (tree);
1369extern void constant_expression_error (tree);
1370extern void overflow_warning (location_t, tree, tree = NULL_TREE);
1371extern void warn_logical_operator (location_t, enum tree_code, tree,
1372 enum tree_code, tree, enum tree_code, tree);
1373extern void warn_tautological_cmp (location_t, enum tree_code, tree, tree);
1374extern void warn_logical_not_parentheses (location_t, enum tree_code, tree,
1375 tree);
1376extern bool warn_if_unused_value (const_tree, location_t);
1377extern bool strict_aliasing_warning (tree, tree, tree);
1378extern void sizeof_pointer_memaccess_warning (location_t *, tree,
1379 vec<tree, va_gc> *, tree *,
1380 bool (*) (tree, tree));
1381extern void check_main_parameter_types (tree decl);
1382extern void warnings_for_convert_and_check (location_t, tree, tree, tree);
1383extern void c_do_switch_warnings (splay_tree, location_t, tree, tree, bool,
1384 bool);
1385extern void warn_for_omitted_condop (location_t, tree);
1386extern void warn_for_restrict (unsigned, tree *, unsigned);
1387
1388/* Places where an lvalue, or modifiable lvalue, may be required.
1389 Used to select diagnostic messages in lvalue_error and
1390 readonly_error. */
1391enum lvalue_use {
1392 lv_assign,
1393 lv_increment,
1394 lv_decrement,
1395 lv_addressof,
1396 lv_asm
1397};
1398
1399extern void lvalue_error (location_t, enum lvalue_use);
1400extern void invalid_indirection_error (location_t, tree, ref_operator);
1401extern void readonly_error (location_t, tree, enum lvalue_use);
1402extern void warn_array_subscript_with_type_char (location_t, tree);
1403extern void warn_about_parentheses (location_t,
1404 enum tree_code,
1405 enum tree_code, tree,
1406 enum tree_code, tree);
1407extern void warn_for_unused_label (tree label);
1408extern void warn_for_div_by_zero (location_t, tree divisor);
1409extern void warn_for_memset (location_t, tree, tree, int);
1410extern void warn_for_sign_compare (location_t,
1411 tree orig_op0, tree orig_op1,
1412 tree op0, tree op1,
1413 tree result_type,
1414 enum tree_code resultcode);
1415extern void do_warn_double_promotion (tree, tree, tree, const char *,
1416 location_t);
1417extern void do_warn_unused_parameter (tree);
1418extern void record_locally_defined_typedef (tree);
1419extern void maybe_record_typedef_use (tree);
1420extern void maybe_warn_unused_local_typedefs (void);
1421extern void maybe_warn_bool_compare (location_t, enum tree_code, tree, tree);
1422extern bool maybe_warn_shift_overflow (location_t, tree, tree);
1423extern void warn_duplicated_cond_add_or_warn (location_t, tree, vec<tree> **);
1424extern bool diagnose_mismatched_attributes (tree, tree);
1425extern tree do_warn_duplicated_branches_r (tree *, int *, void *);
1426extern void warn_for_multistatement_macros (location_t, location_t,
1427 location_t, enum rid);
1428
1429/* In c-attribs.c. */
1430extern bool attribute_takes_identifier_p (const_tree);
1431extern tree handle_unused_attribute (tree *, tree, tree, int, bool *);
1432extern int parse_tm_stmt_attr (tree, int);
1433extern int tm_attr_to_mask (tree);
1434extern tree tm_mask_to_attr (int);
1435extern tree find_tm_attribute (tree);
1436
1437extern enum flt_eval_method
1438excess_precision_mode_join (enum flt_eval_method, enum flt_eval_method);
1439
1440extern int c_flt_eval_method (bool ts18661_p);
1441extern void add_no_sanitize_value (tree node, unsigned int flags);
1442
1443extern void maybe_add_include_fixit (rich_location *, const char *);
1444extern void maybe_suggest_missing_token_insertion (rich_location *richloc,
1445 enum cpp_ttype token_type,
1446 location_t prev_token_loc);
1447
1448#if CHECKING_P
1449namespace selftest {
1450 /* Declarations for specific families of tests within c-family,
1451 by source file, in alphabetical order. */
1452 extern void c_format_c_tests (void);
1453 extern void c_spellcheck_cc_tests (void);
1454
1455 /* The entrypoint for running all of the above tests. */
1456 extern void c_family_tests (void);
1457} // namespace selftest
1458#endif /* #if CHECKING_P */
1459
1460#endif /* ! GCC_C_COMMON_H */
1461