1 /* Definitions for c-common.c. 2 Copyright (C) 1987-2019 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef GCC_C_COMMON_H 21 #define GCC_C_COMMON_H 22 23 #include "splay-tree.h" 24 #include "cpplib.h" 25 #include "alias.h" 26 #include "tree.h" 27 #include "fold-const.h" 28 #include "wide-int-bitmask.h" 29 30 /* In order for the format checking to accept the C frontend 31 diagnostic framework extensions, you must include this file before 32 diagnostic-core.h, not after. The C front end formats are a subset of those 33 for C++, so they are the appropriate set to use in common code; 34 cp-tree.h overrides this for C++. */ 35 #if defined(GCC_DIAGNOSTIC_CORE_H) 36 #error \ 37 In order for the format checking to accept the C front end diagnostic \ 38 framework extensions, you must include this file before diagnostic-core.h \ 39 never after. 40 #endif 41 #ifndef GCC_DIAG_STYLE 42 #define GCC_DIAG_STYLE __gcc_cdiag__ 43 #endif 44 #include "diagnostic-core.h" 45 46 /* Usage of TREE_LANG_FLAG_?: 47 0: IDENTIFIER_MARKED (used by search routines). 48 C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C) 49 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL) 50 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST) 51 C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C) 52 2: unused 53 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST) 54 4: unused 55 */ 56 57 /* Reserved identifiers. This is the union of all the keywords for C, 58 C++, and Objective-C. All the type modifiers have to be in one 59 block at the beginning, because they are used as mask bits. There 60 are 28 type modifiers; if we add many more we will have to redesign 61 the mask mechanism. */ 62 63 enum rid 64 { 65 /* Modifiers: */ 66 /* C, in empirical order of frequency. */ 67 RID_STATIC = 0, 68 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN, 69 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE, 70 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT, 71 RID_NORETURN, RID_ATOMIC, 72 73 /* C extensions */ 74 RID_COMPLEX, RID_THREAD, RID_SAT, 75 76 /* C++ */ 77 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE, 78 79 /* ObjC ("PQ" reserved words - they do not appear after a '@' and 80 are keywords only in specific contexts) */ 81 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY, 82 83 /* ObjC ("PATTR" reserved words - they do not appear after a '@' 84 and are keywords only as property attributes) */ 85 RID_GETTER, RID_SETTER, 86 RID_READONLY, RID_READWRITE, 87 RID_ASSIGN, RID_RETAIN, RID_COPY, 88 RID_NONATOMIC, 89 90 /* C (reserved and imaginary types not implemented, so any use is a 91 syntax error) */ 92 RID_IMAGINARY, 93 94 /* C */ 95 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID, 96 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE, 97 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE, 98 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO, 99 RID_SIZEOF, 100 101 /* C extensions */ 102 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG, 103 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR, 104 RID_TYPES_COMPATIBLE_P, RID_BUILTIN_COMPLEX, RID_BUILTIN_SHUFFLE, 105 RID_BUILTIN_CONVERTVECTOR, RID_BUILTIN_TGMATH, 106 RID_BUILTIN_HAS_ATTRIBUTE, 107 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128, 108 109 /* TS 18661-3 keywords, in the same sequence as the TI_* values. */ 110 RID_FLOAT16, 111 RID_FLOATN_NX_FIRST = RID_FLOAT16, 112 RID_FLOAT32, 113 RID_FLOAT64, 114 RID_FLOAT128, 115 RID_FLOAT32X, 116 RID_FLOAT64X, 117 RID_FLOAT128X, 118 #define CASE_RID_FLOATN_NX \ 119 case RID_FLOAT16: case RID_FLOAT32: case RID_FLOAT64: case RID_FLOAT128: \ 120 case RID_FLOAT32X: case RID_FLOAT64X: case RID_FLOAT128X 121 122 RID_FRACT, RID_ACCUM, RID_AUTO_TYPE, RID_BUILTIN_CALL_WITH_STATIC_CHAIN, 123 124 /* "__GIMPLE", for the GIMPLE-parsing extension to the C frontend. */ 125 RID_GIMPLE, 126 127 /* "__PHI", for parsing PHI function in GIMPLE FE. */ 128 RID_PHI, 129 130 /* "__RTL", for the RTL-parsing extension to the C frontend. */ 131 RID_RTL, 132 133 /* C11 */ 134 RID_ALIGNAS, RID_GENERIC, 135 136 /* This means to warn that this is a C++ keyword, and then treat it 137 as a normal identifier. */ 138 RID_CXX_COMPAT_WARN, 139 140 /* GNU transactional memory extension */ 141 RID_TRANSACTION_ATOMIC, RID_TRANSACTION_RELAXED, RID_TRANSACTION_CANCEL, 142 143 /* Too many ways of getting the name of a function as a string */ 144 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME, 145 146 /* C++ (some of these are keywords in Objective-C as well, but only 147 if they appear after a '@') */ 148 RID_BOOL, RID_WCHAR, RID_CLASS, 149 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED, 150 RID_TEMPLATE, RID_NULL, RID_CATCH, 151 RID_DELETE, RID_FALSE, RID_NAMESPACE, 152 RID_NEW, RID_OFFSETOF, RID_OPERATOR, 153 RID_THIS, RID_THROW, RID_TRUE, 154 RID_TRY, RID_TYPENAME, RID_TYPEID, 155 RID_USING, RID_CHAR16, RID_CHAR32, 156 157 /* casts */ 158 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST, 159 160 /* C++ extensions */ 161 RID_ADDRESSOF, RID_BASES, 162 RID_BUILTIN_LAUNDER, RID_DIRECT_BASES, 163 RID_HAS_NOTHROW_ASSIGN, RID_HAS_NOTHROW_CONSTRUCTOR, 164 RID_HAS_NOTHROW_COPY, RID_HAS_TRIVIAL_ASSIGN, 165 RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY, 166 RID_HAS_TRIVIAL_DESTRUCTOR, RID_HAS_UNIQUE_OBJ_REPRESENTATIONS, 167 RID_HAS_VIRTUAL_DESTRUCTOR, 168 RID_IS_ABSTRACT, RID_IS_AGGREGATE, 169 RID_IS_BASE_OF, RID_IS_CLASS, 170 RID_IS_EMPTY, RID_IS_ENUM, 171 RID_IS_FINAL, RID_IS_LITERAL_TYPE, 172 RID_IS_POD, RID_IS_POLYMORPHIC, 173 RID_IS_SAME_AS, 174 RID_IS_STD_LAYOUT, RID_IS_TRIVIAL, 175 RID_IS_TRIVIALLY_ASSIGNABLE, RID_IS_TRIVIALLY_CONSTRUCTIBLE, 176 RID_IS_TRIVIALLY_COPYABLE, 177 RID_IS_UNION, RID_UNDERLYING_TYPE, 178 RID_IS_ASSIGNABLE, RID_IS_CONSTRUCTIBLE, 179 180 /* C++11 */ 181 RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT, 182 183 /* char8_t */ 184 RID_CHAR8, 185 186 /* C++ concepts */ 187 RID_CONCEPT, RID_REQUIRES, 188 189 /* C++ transactional memory. */ 190 RID_ATOMIC_NOEXCEPT, RID_ATOMIC_CANCEL, RID_SYNCHRONIZED, 191 192 /* Objective-C ("AT" reserved words - they are only keywords when 193 they follow '@') */ 194 RID_AT_ENCODE, RID_AT_END, 195 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS, 196 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, RID_AT_PACKAGE, 197 RID_AT_PROTOCOL, RID_AT_SELECTOR, 198 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH, 199 RID_AT_FINALLY, RID_AT_SYNCHRONIZED, 200 RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY, 201 RID_AT_SYNTHESIZE, RID_AT_DYNAMIC, 202 RID_AT_INTERFACE, 203 RID_AT_IMPLEMENTATION, 204 205 /* Named address support, mapping the keyword to a particular named address 206 number. Named address space 0 is reserved for the generic address. If 207 there are more than 254 named addresses, the addr_space_t type will need 208 to be grown from an unsigned char to unsigned short. */ 209 RID_ADDR_SPACE_0, /* generic address */ 210 RID_ADDR_SPACE_1, 211 RID_ADDR_SPACE_2, 212 RID_ADDR_SPACE_3, 213 RID_ADDR_SPACE_4, 214 RID_ADDR_SPACE_5, 215 RID_ADDR_SPACE_6, 216 RID_ADDR_SPACE_7, 217 RID_ADDR_SPACE_8, 218 RID_ADDR_SPACE_9, 219 RID_ADDR_SPACE_10, 220 RID_ADDR_SPACE_11, 221 RID_ADDR_SPACE_12, 222 RID_ADDR_SPACE_13, 223 RID_ADDR_SPACE_14, 224 RID_ADDR_SPACE_15, 225 226 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0, 227 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15, 228 229 /* __intN keywords. The _N_M here doesn't correspond to the intN 230 in the keyword; use the bitsize in int_n_t_data_t[M] for that. 231 For example, if int_n_t_data_t[0].bitsize is 13, then RID_INT_N_0 232 is for __int13. */ 233 234 /* Note that the range to use is RID_FIRST_INT_N through 235 RID_FIRST_INT_N + NUM_INT_N_ENTS - 1 and c-parser.c has a list of 236 all RID_INT_N_* in a case statement. */ 237 238 RID_INT_N_0, 239 RID_INT_N_1, 240 RID_INT_N_2, 241 RID_INT_N_3, 242 243 RID_FIRST_INT_N = RID_INT_N_0, 244 RID_LAST_INT_N = RID_INT_N_3, 245 246 RID_MAX, 247 248 RID_FIRST_MODIFIER = RID_STATIC, 249 RID_LAST_MODIFIER = RID_ONEWAY, 250 251 RID_FIRST_CXX11 = RID_CONSTEXPR, 252 RID_LAST_CXX11 = RID_STATIC_ASSERT, 253 RID_FIRST_AT = RID_AT_ENCODE, 254 RID_LAST_AT = RID_AT_IMPLEMENTATION, 255 RID_FIRST_PQ = RID_IN, 256 RID_LAST_PQ = RID_ONEWAY, 257 RID_FIRST_PATTR = RID_GETTER, 258 RID_LAST_PATTR = RID_NONATOMIC 259 }; 260 261 #define OBJC_IS_AT_KEYWORD(rid) \ 262 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \ 263 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT) 264 265 #define OBJC_IS_PQ_KEYWORD(rid) \ 266 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \ 267 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ) 268 269 #define OBJC_IS_PATTR_KEYWORD(rid) \ 270 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \ 271 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR) 272 273 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as 274 'class') which are shared in a subtle way between Objective-C and 275 C++. When the lexer is lexing in Objective-C/Objective-C++, if it 276 finds '@' followed by one of these identifiers (eg, '@class'), it 277 recognizes the whole as an Objective-C keyword. If the identifier 278 is found elsewhere, it follows the rules of the C/C++ language. 279 */ 280 #define OBJC_IS_CXX_KEYWORD(rid) \ 281 (rid == RID_CLASS || rid == RID_SYNCHRONIZED \ 282 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \ 283 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH) 284 285 /* The elements of `ridpointers' are identifier nodes for the reserved 286 type names and storage classes. It is indexed by a RID_... value. */ 287 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers; 288 289 /* Standard named or nameless data types of the C compiler. */ 290 291 enum c_tree_index 292 { 293 CTI_CHAR8_TYPE, 294 CTI_CHAR16_TYPE, 295 CTI_CHAR32_TYPE, 296 CTI_WCHAR_TYPE, 297 CTI_UNDERLYING_WCHAR_TYPE, 298 CTI_WINT_TYPE, 299 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */ 300 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */ 301 CTI_INTMAX_TYPE, 302 CTI_UINTMAX_TYPE, 303 CTI_WIDEST_INT_LIT_TYPE, 304 CTI_WIDEST_UINT_LIT_TYPE, 305 306 /* Types for <stdint.h>, that may not be defined on all 307 targets. */ 308 CTI_SIG_ATOMIC_TYPE, 309 CTI_INT8_TYPE, 310 CTI_INT16_TYPE, 311 CTI_INT32_TYPE, 312 CTI_INT64_TYPE, 313 CTI_UINT8_TYPE, 314 CTI_UINT16_TYPE, 315 CTI_UINT32_TYPE, 316 CTI_UINT64_TYPE, 317 CTI_INT_LEAST8_TYPE, 318 CTI_INT_LEAST16_TYPE, 319 CTI_INT_LEAST32_TYPE, 320 CTI_INT_LEAST64_TYPE, 321 CTI_UINT_LEAST8_TYPE, 322 CTI_UINT_LEAST16_TYPE, 323 CTI_UINT_LEAST32_TYPE, 324 CTI_UINT_LEAST64_TYPE, 325 CTI_INT_FAST8_TYPE, 326 CTI_INT_FAST16_TYPE, 327 CTI_INT_FAST32_TYPE, 328 CTI_INT_FAST64_TYPE, 329 CTI_UINT_FAST8_TYPE, 330 CTI_UINT_FAST16_TYPE, 331 CTI_UINT_FAST32_TYPE, 332 CTI_UINT_FAST64_TYPE, 333 CTI_INTPTR_TYPE, 334 CTI_UINTPTR_TYPE, 335 336 CTI_CHAR_ARRAY_TYPE, 337 CTI_CHAR8_ARRAY_TYPE, 338 CTI_CHAR16_ARRAY_TYPE, 339 CTI_CHAR32_ARRAY_TYPE, 340 CTI_WCHAR_ARRAY_TYPE, 341 CTI_STRING_TYPE, 342 CTI_CONST_STRING_TYPE, 343 344 /* Type for boolean expressions (bool in C++, int in C). */ 345 CTI_TRUTHVALUE_TYPE, 346 CTI_TRUTHVALUE_TRUE, 347 CTI_TRUTHVALUE_FALSE, 348 349 CTI_DEFAULT_FUNCTION_TYPE, 350 351 /* These are not types, but we have to look them up all the time. */ 352 CTI_FUNCTION_NAME_DECL, 353 CTI_PRETTY_FUNCTION_NAME_DECL, 354 CTI_C99_FUNCTION_NAME_DECL, 355 CTI_SAVED_FUNCTION_NAME_DECLS, 356 357 CTI_NULL, 358 359 CTI_MAX 360 }; 361 362 #define C_CPP_HASHNODE(id) \ 363 (&(((struct c_common_identifier *) (id))->node)) 364 #define C_RID_CODE(id) \ 365 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code)) 366 #define C_SET_RID_CODE(id, code) \ 367 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code) 368 369 /* Identifier part common to the C front ends. Inherits from 370 tree_identifier, despite appearances. */ 371 struct GTY(()) c_common_identifier { 372 struct tree_common common; 373 struct cpp_hashnode node; 374 }; 375 376 /* An entry in the reserved keyword table. */ 377 378 struct c_common_resword 379 { 380 const char *const word; 381 ENUM_BITFIELD(rid) const rid : 16; 382 const unsigned int disable : 16; 383 }; 384 385 /* Mode used to build pointers (VOIDmode means ptr_mode). */ 386 387 extern machine_mode c_default_pointer_mode; 388 389 /* Extra cpp_ttype values for C++. */ 390 391 /* A token type for template-ids. If a template-id is processed while 392 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token; 393 the value of the CPP_TEMPLATE_ID is whatever was returned by 394 cp_parser_template_id. */ 395 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1)) 396 397 /* A token type for nested-name-specifiers. If a 398 nested-name-specifier is processed while parsing tentatively, it is 399 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the 400 CPP_NESTED_NAME_SPECIFIER is whatever was returned by 401 cp_parser_nested_name_specifier_opt. */ 402 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1)) 403 404 /* A token type for pre-parsed C++0x decltype. */ 405 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1)) 406 407 /* A token type for pre-parsed primary-expression (lambda- or statement-). */ 408 #define CPP_PREPARSED_EXPR ((enum cpp_ttype) (CPP_DECLTYPE + 1)) 409 410 /* The number of token types, including C++-specific ones. */ 411 #define N_CP_TTYPES ((int) (CPP_PREPARSED_EXPR + 1)) 412 413 /* Disable mask. Keywords are disabled if (reswords[i].disable & 414 mask) is _true_. Thus for keywords which are present in all 415 languages the disable field is zero. */ 416 417 #define D_CONLY 0x0001 /* C only (not in C++). */ 418 #define D_CXXONLY 0x0002 /* C++ only (not in C). */ 419 #define D_C99 0x0004 /* In C, C99 only. */ 420 #define D_CXX11 0x0008 /* In C++, C++11 only. */ 421 #define D_EXT 0x0010 /* GCC extension. */ 422 #define D_EXT89 0x0020 /* GCC extension incorporated in C99. */ 423 #define D_ASM 0x0040 /* Disabled by -fno-asm. */ 424 #define D_OBJC 0x0080 /* In Objective C and neither C nor C++. */ 425 #define D_CXX_OBJC 0x0100 /* In Objective C, and C++, but not C. */ 426 #define D_CXXWARN 0x0200 /* In C warn with -Wcxx-compat. */ 427 #define D_CXX_CONCEPTS 0x0400 /* In C++, only with concepts. */ 428 #define D_TRANSMEM 0X0800 /* C++ transactional memory TS. */ 429 #define D_CXX_CHAR8_T 0X1000 /* In C++, only with -fchar8_t. */ 430 431 #define D_CXX_CONCEPTS_FLAGS D_CXXONLY | D_CXX_CONCEPTS 432 #define D_CXX_CHAR8_T_FLAGS D_CXXONLY | D_CXX_CHAR8_T 433 434 /* The reserved keyword table. */ 435 extern const struct c_common_resword c_common_reswords[]; 436 437 /* The number of items in the reserved keyword table. */ 438 extern const unsigned int num_c_common_reswords; 439 440 #define char8_type_node c_global_trees[CTI_CHAR8_TYPE] 441 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE] 442 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE] 443 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE] 444 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE] 445 #define wint_type_node c_global_trees[CTI_WINT_TYPE] 446 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE] 447 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE] 448 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE] 449 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE] 450 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE] 451 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE] 452 453 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE] 454 #define int8_type_node c_global_trees[CTI_INT8_TYPE] 455 #define int16_type_node c_global_trees[CTI_INT16_TYPE] 456 #define int32_type_node c_global_trees[CTI_INT32_TYPE] 457 #define int64_type_node c_global_trees[CTI_INT64_TYPE] 458 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE] 459 #define c_uint16_type_node c_global_trees[CTI_UINT16_TYPE] 460 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE] 461 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE] 462 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE] 463 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE] 464 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE] 465 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE] 466 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE] 467 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE] 468 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE] 469 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE] 470 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE] 471 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE] 472 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE] 473 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE] 474 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE] 475 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE] 476 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE] 477 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE] 478 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE] 479 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE] 480 481 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE] 482 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE] 483 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE] 484 485 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE] 486 #define char8_array_type_node c_global_trees[CTI_CHAR8_ARRAY_TYPE] 487 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE] 488 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE] 489 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE] 490 #define string_type_node c_global_trees[CTI_STRING_TYPE] 491 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE] 492 493 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE] 494 495 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL] 496 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL] 497 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL] 498 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS] 499 500 /* The node for C++ `__null'. */ 501 #define null_node c_global_trees[CTI_NULL] 502 503 extern GTY(()) tree c_global_trees[CTI_MAX]; 504 505 /* Mark which labels are explicitly declared. 506 These may be shadowed, and may be referenced from nested functions. */ 507 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label) 508 509 enum c_language_kind 510 { 511 clk_c = 0, /* C90, C94, C99, C11 or C2X */ 512 clk_objc = 1, /* clk_c with ObjC features. */ 513 clk_cxx = 2, /* ANSI/ISO C++ */ 514 clk_objcxx = 3 /* clk_cxx with ObjC features. */ 515 }; 516 517 /* To test for a specific language use c_language, defined by each 518 front end. For "ObjC features" or "not C++" use the macros. */ 519 extern c_language_kind c_language; 520 521 #define c_dialect_cxx() ((c_language & clk_cxx) != 0) 522 #define c_dialect_objc() ((c_language & clk_objc) != 0) 523 524 /* The various name of operator that appears in error messages. */ 525 enum ref_operator { 526 /* NULL */ 527 RO_NULL, 528 /* array indexing */ 529 RO_ARRAY_INDEXING, 530 /* unary * */ 531 RO_UNARY_STAR, 532 /* -> */ 533 RO_ARROW, 534 /* implicit conversion */ 535 RO_IMPLICIT_CONVERSION, 536 /* ->* */ 537 RO_ARROW_STAR 538 }; 539 540 /* Information about a statement tree. */ 541 542 struct GTY(()) stmt_tree_s { 543 /* A stack of statement lists being collected. */ 544 vec<tree, va_gc> *x_cur_stmt_list; 545 546 /* In C++, Nonzero if we should treat statements as full 547 expressions. In particular, this variable is non-zero if at the 548 end of a statement we should destroy any temporaries created 549 during that statement. Similarly, if, at the end of a block, we 550 should destroy any local variables in this block. Normally, this 551 variable is nonzero, since those are the normal semantics of 552 C++. 553 554 This flag has no effect in C. */ 555 int stmts_are_full_exprs_p; 556 }; 557 558 typedef struct stmt_tree_s *stmt_tree; 559 560 /* Global state pertinent to the current function. Some C dialects 561 extend this structure with additional fields. */ 562 563 struct GTY(()) c_language_function { 564 /* While we are parsing the function, this contains information 565 about the statement-tree that we are building. */ 566 struct stmt_tree_s x_stmt_tree; 567 568 /* Vector of locally defined typedefs, for 569 -Wunused-local-typedefs. */ 570 vec<tree, va_gc> *local_typedefs; 571 }; 572 573 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list) 574 575 /* When building a statement-tree, this is the current statement list 576 being collected. */ 577 #define cur_stmt_list (stmt_list_stack->last ()) 578 579 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty()) 580 581 /* Language-specific hooks. */ 582 583 /* If non-NULL, this function is called after a precompile header file 584 is loaded. */ 585 extern void (*lang_post_pch_load) (void); 586 587 extern void push_file_scope (void); 588 extern void pop_file_scope (void); 589 extern stmt_tree current_stmt_tree (void); 590 extern tree push_stmt_list (void); 591 extern tree pop_stmt_list (tree); 592 extern tree add_stmt (tree); 593 extern void push_cleanup (tree, tree, bool); 594 595 extern tree build_modify_expr (location_t, tree, tree, enum tree_code, 596 location_t, tree, tree); 597 extern tree build_indirect_ref (location_t, tree, ref_operator); 598 599 extern bool has_c_linkage (const_tree decl); 600 extern bool c_decl_implicit (const_tree); 601 602 /* Switches common to the C front ends. */ 603 604 /* Nonzero means don't output line number information. */ 605 606 extern char flag_no_line_commands; 607 608 /* Nonzero causes -E output not to be done, but directives such as 609 #define that have side effects are still obeyed. */ 610 611 extern char flag_no_output; 612 613 /* Nonzero means dump macros in some fashion; contains the 'D', 'M', 614 'N' or 'U' of the command line switch. */ 615 616 extern char flag_dump_macros; 617 618 /* Nonzero means pass #include lines through to the output. */ 619 620 extern char flag_dump_includes; 621 622 /* Nonzero means process PCH files while preprocessing. */ 623 624 extern bool flag_pch_preprocess; 625 626 /* The file name to which we should write a precompiled header, or 627 NULL if no header will be written in this compile. */ 628 629 extern const char *pch_file; 630 631 /* Nonzero if an ISO standard was selected. It rejects macros in the 632 user's namespace. */ 633 634 extern int flag_iso; 635 636 /* C/ObjC language option variables. */ 637 638 639 /* Nonzero means allow type mismatches in conditional expressions; 640 just make their values `void'. */ 641 642 extern int flag_cond_mismatch; 643 644 /* Nonzero means enable C89 Amendment 1 features. */ 645 646 extern int flag_isoc94; 647 648 /* Nonzero means use the ISO C99 (or later) dialect of C. */ 649 650 extern int flag_isoc99; 651 652 /* Nonzero means use the ISO C11 (or later) dialect of C. */ 653 654 extern int flag_isoc11; 655 656 /* Nonzero means use the ISO C2X dialect of C. */ 657 658 extern int flag_isoc2x; 659 660 /* Nonzero means that we have builtin functions, and main is an int. */ 661 662 extern int flag_hosted; 663 664 /* ObjC language option variables. */ 665 666 667 /* Tells the compiler that this is a special run. Do not perform any 668 compiling, instead we are to test some platform dependent features 669 and output a C header file with appropriate definitions. */ 670 671 extern int print_struct_values; 672 673 /* Tells the compiler what is the constant string class for ObjC. */ 674 675 extern const char *constant_string_class_name; 676 677 678 /* C++ language option variables. */ 679 680 /* The reference version of the ABI for -Wabi. */ 681 682 extern int warn_abi_version; 683 684 /* Return TRUE if one of {flag_abi_version,flag_abi_compat_version} is 685 less than N and the other is at least N. */ 686 #define abi_compat_version_crosses(N) \ 687 (abi_version_at_least(N) \ 688 != (flag_abi_compat_version == 0 \ 689 || flag_abi_compat_version >= (N))) 690 691 /* Return TRUE if one of {flag_abi_version,warn_abi_version} is 692 less than N and the other is at least N, for use by -Wabi. */ 693 #define abi_version_crosses(N) \ 694 (abi_version_at_least(N) \ 695 != (warn_abi_version == 0 \ 696 || warn_abi_version >= (N))) 697 698 /* Nonzero means generate separate instantiation control files and 699 juggle them at link time. */ 700 701 extern int flag_use_repository; 702 703 /* The supported C++ dialects. */ 704 705 enum cxx_dialect { 706 cxx_unset, 707 /* C++98 with TC1 */ 708 cxx98, 709 cxx03 = cxx98, 710 /* C++11 */ 711 cxx0x, 712 cxx11 = cxx0x, 713 /* C++14 */ 714 cxx14, 715 /* C++17 */ 716 cxx17, 717 /* C++2a (C++20?) */ 718 cxx2a 719 }; 720 721 /* The C++ dialect being used. C++98 is the default. */ 722 extern enum cxx_dialect cxx_dialect; 723 724 /* Maximum template instantiation depth. This limit is rather 725 arbitrary, but it exists to limit the time it takes to notice 726 excessively recursive template instantiations. */ 727 728 extern int max_tinst_depth; 729 730 /* Nonzero means that we should not issue warnings about problems that 731 occur when the code is executed, because the code being processed 732 is not expected to be executed. This is set during parsing. This 733 is used for cases like sizeof() and "0 ? a : b". This is a count, 734 not a bool, because unexecuted expressions can nest. */ 735 736 extern int c_inhibit_evaluation_warnings; 737 738 /* Whether lexing has been completed, so subsequent preprocessor 739 errors should use the compiler's input_location. */ 740 741 extern bool done_lexing; 742 743 /* C types are partitioned into three subsets: object, function, and 744 incomplete types. */ 745 #define C_TYPE_OBJECT_P(type) \ 746 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type)) 747 748 #define C_TYPE_INCOMPLETE_P(type) \ 749 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0) 750 751 #define C_TYPE_FUNCTION_P(type) \ 752 (TREE_CODE (type) == FUNCTION_TYPE) 753 754 /* For convenience we define a single macro to identify the class of 755 object or incomplete types. */ 756 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \ 757 (!C_TYPE_FUNCTION_P (type)) 758 759 struct visibility_flags 760 { 761 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */ 762 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */ 763 }; 764 765 /* These enumerators are possible types of unsafe conversions. */ 766 enum conversion_safety { 767 /* The conversion is safe. */ 768 SAFE_CONVERSION = 0, 769 /* Another type of conversion with problems. */ 770 UNSAFE_OTHER, 771 /* Conversion between signed and unsigned integers 772 which are all warned about immediately, so this is unused. */ 773 UNSAFE_SIGN, 774 /* Conversions that reduce the precision of reals including conversions 775 from reals to integers. */ 776 UNSAFE_REAL, 777 /* Conversions from complex to reals or integers, that discard imaginary 778 component. */ 779 UNSAFE_IMAGINARY 780 }; 781 782 /* Global visibility options. */ 783 extern struct visibility_flags visibility_options; 784 785 /* Attribute table common to the C front ends. */ 786 extern const struct attribute_spec c_common_attribute_table[]; 787 extern const struct attribute_spec c_common_format_attribute_table[]; 788 789 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc. 790 ID is the identifier to use, NAME is the string. 791 TYPE_DEP indicates whether it depends on type of the function or not 792 (i.e. __PRETTY_FUNCTION__). */ 793 794 extern tree (*make_fname_decl) (location_t, tree, int); 795 796 /* In c-decl.c and cp/tree.c. FIXME. */ 797 extern void c_register_addr_space (const char *str, addr_space_t as); 798 799 /* In c-common.c. */ 800 extern bool in_late_binary_op; 801 extern const char *c_addr_space_name (addr_space_t as); 802 extern tree identifier_global_value (tree); 803 extern tree identifier_global_tag (tree); 804 extern tree c_linkage_bindings (tree); 805 extern void record_builtin_type (enum rid, const char *, tree); 806 extern tree build_void_list_node (void); 807 extern void start_fname_decls (void); 808 extern void finish_fname_decls (void); 809 extern const char *fname_as_string (int); 810 extern tree fname_decl (location_t, unsigned, tree); 811 812 extern int check_user_alignment (const_tree, bool, bool); 813 extern bool check_function_arguments (location_t loc, const_tree, const_tree, 814 int, tree *, vec<location_t> *); 815 extern void check_function_arguments_recurse (void (*) 816 (void *, tree, 817 unsigned HOST_WIDE_INT), 818 void *, tree, 819 unsigned HOST_WIDE_INT); 820 extern bool check_builtin_function_arguments (location_t, vec<location_t>, 821 tree, int, tree *); 822 extern void check_function_format (const_tree, tree, int, tree *, 823 vec<location_t> *); 824 extern bool attribute_fallthrough_p (tree); 825 extern tree handle_format_attribute (tree *, tree, tree, int, bool *); 826 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *); 827 extern bool c_common_handle_option (size_t, const char *, HOST_WIDE_INT, int, 828 location_t, 829 const struct cl_option_handlers *); 830 extern bool default_handle_c_option (size_t, const char *, int); 831 extern tree c_common_type_for_mode (machine_mode, int); 832 extern tree c_common_type_for_size (unsigned int, int); 833 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int, 834 int, int); 835 extern tree c_common_unsigned_type (tree); 836 extern tree c_common_signed_type (tree); 837 extern tree c_common_signed_or_unsigned_type (int, tree); 838 extern void c_common_init_ts (void); 839 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int); 840 extern enum conversion_safety unsafe_conversion_p (location_t, tree, tree, tree, 841 bool); 842 extern bool decl_with_nonnull_addr_p (const_tree); 843 extern tree c_fully_fold (tree, bool, bool *, bool = false); 844 extern tree c_wrap_maybe_const (tree, bool); 845 extern tree c_common_truthvalue_conversion (location_t, tree); 846 extern void c_apply_type_quals_to_decl (int, tree); 847 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, bool, int); 848 extern tree c_alignof_expr (location_t, tree); 849 /* Print an error message for invalid operands to arith operation CODE. 850 NOP_EXPR is used as a special case (see truthvalue_conversion). */ 851 extern void binary_op_error (rich_location *, enum tree_code, tree, tree); 852 extern tree fix_string_type (tree); 853 extern tree convert_and_check (location_t, tree, tree); 854 extern bool c_determine_visibility (tree); 855 extern bool vector_types_compatible_elements_p (tree, tree); 856 extern void mark_valid_location_for_stdc_pragma (bool); 857 extern bool valid_location_for_stdc_pragma_p (void); 858 extern void set_float_const_decimal64 (void); 859 extern void clear_float_const_decimal64 (void); 860 extern bool float_const_decimal64_p (void); 861 862 extern bool keyword_begins_type_specifier (enum rid); 863 extern bool keyword_is_storage_class_specifier (enum rid); 864 extern bool keyword_is_type_qualifier (enum rid); 865 extern bool keyword_is_decl_specifier (enum rid); 866 extern unsigned max_align_t_align (void); 867 extern bool cxx_fundamental_alignment_p (unsigned); 868 extern bool pointer_to_zero_sized_aggr_p (tree); 869 extern bool bool_promoted_to_int_p (tree); 870 extern tree fold_for_warn (tree); 871 extern tree c_common_get_narrower (tree, int *); 872 extern bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *); 873 874 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, false, 1) 875 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, false, 1) 876 877 /* Subroutine of build_binary_op, used for certain operations. */ 878 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise); 879 880 /* Subroutine of build_binary_op, used for comparison operations. 881 See if the operands have both been converted from subword integer types 882 and, if so, perhaps change them both back to their original type. */ 883 extern tree shorten_compare (location_t, tree *, tree *, tree *, 884 enum tree_code *); 885 886 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree, 887 bool = true); 888 889 /* Add qualifiers to a type, in the fashion for C. */ 890 extern tree c_build_qualified_type (tree, int, tree = NULL_TREE, size_t = 0); 891 892 /* Build tree nodes and builtin functions common to both C and C++ language 893 frontends. */ 894 extern void c_common_nodes_and_builtins (void); 895 896 extern void disable_builtin_function (const char *); 897 898 extern void set_compound_literal_name (tree decl); 899 900 extern tree build_va_arg (location_t, tree, tree); 901 902 extern const unsigned int c_family_lang_mask; 903 extern unsigned int c_common_option_lang_mask (void); 904 extern void c_common_diagnostics_set_defaults (diagnostic_context *); 905 extern bool c_common_complain_wrong_lang_p (const struct cl_option *); 906 extern void c_common_init_options_struct (struct gcc_options *); 907 extern void c_common_init_options (unsigned int, struct cl_decoded_option *); 908 extern bool c_common_post_options (const char **); 909 extern bool c_common_init (void); 910 extern void c_common_finish (void); 911 extern void c_common_parse_file (void); 912 extern FILE *get_dump_info (int, dump_flags_t *); 913 extern alias_set_type c_common_get_alias_set (tree); 914 extern void c_register_builtin_type (tree, const char*); 915 extern bool c_promoting_integer_type_p (const_tree); 916 extern bool self_promoting_args_p (const_tree); 917 extern tree strip_pointer_operator (tree); 918 extern tree strip_pointer_or_array_types (tree); 919 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT); 920 921 /* This is the basic parsing function. */ 922 extern void c_parse_file (void); 923 924 extern void c_parse_final_cleanups (void); 925 926 /* These macros provide convenient access to the various _STMT nodes. */ 927 928 /* Nonzero if a given STATEMENT_LIST represents the outermost binding 929 if a statement expression. */ 930 #define STATEMENT_LIST_STMT_EXPR(NODE) \ 931 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE)) 932 933 /* Nonzero if a label has been added to the statement list. */ 934 #define STATEMENT_LIST_HAS_LABEL(NODE) \ 935 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE)) 936 937 /* C_MAYBE_CONST_EXPR accessors. */ 938 #define C_MAYBE_CONST_EXPR_PRE(NODE) \ 939 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0) 940 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \ 941 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1) 942 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \ 943 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE)) 944 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \ 945 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE)) 946 #define EXPR_INT_CONST_OPERANDS(EXPR) \ 947 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \ 948 && (TREE_CODE (EXPR) == INTEGER_CST \ 949 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \ 950 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR)))) 951 952 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */ 953 #define DECL_C_BIT_FIELD(NODE) \ 954 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1) 955 #define SET_DECL_C_BIT_FIELD(NODE) \ 956 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1) 957 #define CLEAR_DECL_C_BIT_FIELD(NODE) \ 958 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0) 959 960 /* True if the decl was an unnamed bitfield. */ 961 #define DECL_UNNAMED_BIT_FIELD(NODE) \ 962 (DECL_C_BIT_FIELD (NODE) && !DECL_NAME (NODE)) 963 964 extern tree do_case (location_t, tree, tree); 965 extern tree build_stmt (location_t, enum tree_code, ...); 966 extern tree build_real_imag_expr (location_t, enum tree_code, tree); 967 968 /* These functions must be defined by each front-end which implements 969 a variant of the C language. They are used in c-common.c. */ 970 971 extern tree build_unary_op (location_t, enum tree_code, tree, bool); 972 extern tree build_binary_op (location_t, enum tree_code, tree, tree, bool); 973 extern tree perform_integral_promotions (tree); 974 975 /* These functions must be defined by each front-end which implements 976 a variant of the C language. They are used by port files. */ 977 978 extern tree default_conversion (tree); 979 980 /* Given two integer or real types, return the type for their sum. 981 Given two compatible ANSI C types, returns the merged type. */ 982 983 extern tree common_type (tree, tree); 984 985 extern tree decl_constant_value (tree); 986 987 /* Handle increment and decrement of boolean types. */ 988 extern tree boolean_increment (enum tree_code, tree); 989 990 extern int case_compare (splay_tree_key, splay_tree_key); 991 992 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree); 993 extern bool c_switch_covers_all_cases_p (splay_tree, tree); 994 995 extern tree build_function_call (location_t, tree, tree); 996 997 extern tree build_function_call_vec (location_t, vec<location_t>, tree, 998 vec<tree, va_gc> *, vec<tree, va_gc> *); 999 1000 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *); 1001 1002 extern tree finish_label_address_expr (tree, location_t); 1003 1004 /* Same function prototype, but the C and C++ front ends have 1005 different implementations. Used in c-common.c. */ 1006 extern tree lookup_label (tree); 1007 extern tree lookup_name (tree); 1008 extern bool lvalue_p (const_tree); 1009 1010 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2); 1011 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note); 1012 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true); 1013 extern tree c_build_vec_convert (location_t, tree, location_t, tree, bool = true); 1014 1015 extern void init_c_lex (void); 1016 1017 extern void c_cpp_builtins (cpp_reader *); 1018 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree); 1019 extern bool c_cpp_diagnostic (cpp_reader *, enum cpp_diagnostic_level, 1020 enum cpp_warning_reason, rich_location *, 1021 const char *, va_list *) 1022 ATTRIBUTE_GCC_DIAG(5,0); 1023 extern int c_common_has_attribute (cpp_reader *); 1024 1025 extern bool parse_optimize_options (tree, bool); 1026 1027 /* Positive if an implicit `extern "C"' scope has just been entered; 1028 negative if such a scope has just been exited. */ 1029 extern GTY(()) int pending_lang_change; 1030 1031 /* Information recorded about each file examined during compilation. */ 1032 1033 struct c_fileinfo 1034 { 1035 int time; /* Time spent in the file. */ 1036 1037 /* Flags used only by C++. 1038 INTERFACE_ONLY nonzero means that we are in an "interface" section 1039 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust 1040 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and 1041 INTERFACE_ONLY is zero, it means that we are responsible for 1042 exporting definitions that others might need. */ 1043 short interface_only; 1044 short interface_unknown; 1045 }; 1046 1047 struct c_fileinfo *get_fileinfo (const char *); 1048 extern void dump_time_statistics (void); 1049 1050 extern bool c_dump_tree (void *, tree); 1051 1052 extern void verify_sequence_points (tree); 1053 1054 extern tree fold_offsetof (tree, tree = size_type_node, 1055 tree_code ctx = ERROR_MARK); 1056 1057 extern int complete_array_type (tree *, tree, bool); 1058 extern void complete_flexible_array_elts (tree); 1059 1060 extern tree builtin_type_for_size (int, bool); 1061 1062 extern void c_common_mark_addressable_vec (tree); 1063 1064 extern void set_underlying_type (tree); 1065 extern void record_types_used_by_current_var_decl (tree); 1066 extern vec<tree, va_gc> *make_tree_vector (void); 1067 extern void release_tree_vector (vec<tree, va_gc> *); 1068 extern vec<tree, va_gc> *make_tree_vector_single (tree); 1069 extern vec<tree, va_gc> *make_tree_vector_from_list (tree); 1070 extern vec<tree, va_gc> *make_tree_vector_from_ctor (tree); 1071 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *); 1072 1073 /* Used for communication between c_common_type_for_mode and 1074 c_register_builtin_type. */ 1075 extern GTY(()) tree registered_builtin_types; 1076 1077 /* Read SOURCE_DATE_EPOCH from environment to have a deterministic 1078 timestamp to replace embedded current dates to get reproducible 1079 results. Returns -1 if SOURCE_DATE_EPOCH is not defined. */ 1080 extern time_t cb_get_source_date_epoch (cpp_reader *pfile); 1081 1082 /* The value (as a unix timestamp) corresponds to date 1083 "Dec 31 9999 23:59:59 UTC", which is the latest date that __DATE__ and 1084 __TIME__ can store. */ 1085 #define MAX_SOURCE_DATE_EPOCH HOST_WIDE_INT_C (253402300799) 1086 1087 /* Callback for libcpp for offering spelling suggestions for misspelled 1088 directives. */ 1089 extern const char *cb_get_suggestion (cpp_reader *, const char *, 1090 const char *const *); 1091 1092 extern GTY(()) string_concat_db *g_string_concat_db; 1093 1094 class substring_loc; 1095 extern const char *c_get_substring_location (const substring_loc &substr_loc, 1096 location_t *out_loc); 1097 1098 /* In c-gimplify.c */ 1099 extern void c_genericize (tree); 1100 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *); 1101 extern tree c_build_bind_expr (location_t, tree, tree); 1102 1103 /* In c-lex.c. */ 1104 extern enum cpp_ttype 1105 conflict_marker_get_final_tok_kind (enum cpp_ttype tok1_kind); 1106 1107 /* In c-pch.c */ 1108 extern void pch_init (void); 1109 extern void pch_cpp_save_state (void); 1110 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd); 1111 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd, 1112 const char *orig); 1113 extern void c_common_write_pch (void); 1114 extern void c_common_no_more_pch (void); 1115 extern void c_common_pch_pragma (cpp_reader *pfile, const char *); 1116 1117 /* In *-checksum.c */ 1118 extern const unsigned char executable_checksum[16]; 1119 1120 /* In c-cppbuiltin.c */ 1121 extern void builtin_define_std (const char *macro); 1122 extern void builtin_define_with_value (const char *, const char *, int); 1123 extern void builtin_define_with_int_value (const char *, HOST_WIDE_INT); 1124 extern void builtin_define_type_sizeof (const char *, tree); 1125 extern void c_stddef_cpp_builtins (void); 1126 extern void fe_file_change (const line_map_ordinary *); 1127 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char, 1128 rich_location *richloc); 1129 1130 /* In c-ppoutput.c */ 1131 extern void init_pp_output (FILE *); 1132 extern void preprocess_file (cpp_reader *); 1133 extern void pp_file_change (const line_map_ordinary *); 1134 extern void pp_dir_change (cpp_reader *, const char *); 1135 extern bool check_missing_format_attribute (tree, tree); 1136 1137 /* In c-omp.c */ 1138 typedef wide_int_bitmask omp_clause_mask; 1139 1140 #define OMP_CLAUSE_MASK_1 omp_clause_mask (1) 1141 1142 enum c_omp_clause_split 1143 { 1144 C_OMP_CLAUSE_SPLIT_TARGET = 0, 1145 C_OMP_CLAUSE_SPLIT_TEAMS, 1146 C_OMP_CLAUSE_SPLIT_DISTRIBUTE, 1147 C_OMP_CLAUSE_SPLIT_PARALLEL, 1148 C_OMP_CLAUSE_SPLIT_FOR, 1149 C_OMP_CLAUSE_SPLIT_SIMD, 1150 C_OMP_CLAUSE_SPLIT_COUNT, 1151 C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR, 1152 C_OMP_CLAUSE_SPLIT_TASKLOOP = C_OMP_CLAUSE_SPLIT_FOR 1153 }; 1154 1155 enum c_omp_region_type 1156 { 1157 C_ORT_OMP = 1 << 0, 1158 C_ORT_ACC = 1 << 1, 1159 C_ORT_DECLARE_SIMD = 1 << 2, 1160 C_ORT_OMP_DECLARE_SIMD = C_ORT_OMP | C_ORT_DECLARE_SIMD 1161 }; 1162 1163 extern tree c_finish_omp_master (location_t, tree); 1164 extern tree c_finish_omp_taskgroup (location_t, tree, tree); 1165 extern tree c_finish_omp_critical (location_t, tree, tree, tree); 1166 extern tree c_finish_omp_ordered (location_t, tree, tree); 1167 extern void c_finish_omp_barrier (location_t); 1168 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code, 1169 tree, tree, tree, tree, tree, bool, 1170 enum omp_memory_order, bool = false); 1171 extern bool c_omp_depend_t_p (tree); 1172 extern void c_finish_omp_depobj (location_t, tree, enum omp_clause_depend_kind, 1173 tree); 1174 extern void c_finish_omp_flush (location_t, int); 1175 extern void c_finish_omp_taskwait (location_t); 1176 extern void c_finish_omp_taskyield (location_t); 1177 extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree, 1178 tree, tree, tree, tree, bool); 1179 extern bool c_omp_check_loop_iv (tree, tree, walk_tree_lh); 1180 extern bool c_omp_check_loop_iv_exprs (location_t, tree, tree, tree, tree, 1181 walk_tree_lh); 1182 extern tree c_finish_oacc_wait (location_t, tree, tree); 1183 extern tree c_oacc_split_loop_clauses (tree, tree *, bool); 1184 extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask, 1185 tree, tree *); 1186 extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree); 1187 extern void c_omp_declare_simd_clauses_to_decls (tree, tree); 1188 extern bool c_omp_predefined_variable (tree); 1189 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree); 1190 1191 /* Return next tree in the chain for chain_next walking of tree nodes. */ 1192 static inline tree 1193 c_tree_chain_next (tree t) 1194 { 1195 /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different 1196 kind of object, never a long chain of nodes. Prefer 1197 TYPE_NEXT_VARIANT for types. */ 1198 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON)) 1199 return TYPE_NEXT_VARIANT (t); 1200 /* Otherwise, if there is TREE_CHAIN, return it. */ 1201 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON)) 1202 return TREE_CHAIN (t); 1203 return NULL; 1204 } 1205 1206 /* Mask used by tm_stmt_attr. */ 1207 #define TM_STMT_ATTR_OUTER 2 1208 #define TM_STMT_ATTR_ATOMIC 4 1209 #define TM_STMT_ATTR_RELAXED 8 1210 1211 /* Mask used by tm_attr_to_mask and tm_mask_to_attr. Note that these 1212 are ordered specifically such that more restrictive attributes are 1213 at lower bit positions. This fact is known by the C++ tm attribute 1214 inheritance code such that least bit extraction (mask & -mask) results 1215 in the most restrictive attribute. */ 1216 #define TM_ATTR_SAFE 1 1217 #define TM_ATTR_CALLABLE 2 1218 #define TM_ATTR_PURE 4 1219 #define TM_ATTR_IRREVOCABLE 8 1220 #define TM_ATTR_MAY_CANCEL_OUTER 16 1221 1222 /* A suffix-identifier value doublet that represents user-defined literals 1223 for C++-0x. */ 1224 enum overflow_type { 1225 OT_UNDERFLOW = -1, 1226 OT_NONE, 1227 OT_OVERFLOW 1228 }; 1229 1230 struct GTY(()) tree_userdef_literal { 1231 struct tree_base base; 1232 tree suffix_id; 1233 tree value; 1234 tree num_string; 1235 enum overflow_type overflow; 1236 }; 1237 1238 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \ 1239 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id) 1240 1241 #define USERDEF_LITERAL_VALUE(NODE) \ 1242 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value) 1243 1244 #define USERDEF_LITERAL_OVERFLOW(NODE) \ 1245 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow) 1246 1247 #define USERDEF_LITERAL_NUM_STRING(NODE) \ 1248 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string) 1249 1250 #define USERDEF_LITERAL_TYPE(NODE) \ 1251 (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE))) 1252 1253 extern tree build_userdef_literal (tree suffix_id, tree value, 1254 enum overflow_type overflow, 1255 tree num_string); 1256 1257 extern bool convert_vector_to_array_for_subscript (location_t, tree *, tree); 1258 1259 /* Possibe cases of scalar_to_vector conversion. */ 1260 enum stv_conv { 1261 stv_error, /* Error occurred. */ 1262 stv_nothing, /* Nothing happened. */ 1263 stv_firstarg, /* First argument must be expanded. */ 1264 stv_secondarg /* Second argument must be expanded. */ 1265 }; 1266 1267 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code, 1268 tree op0, tree op1, bool); 1269 1270 extern tree find_inv_trees (tree *, int *, void *); 1271 extern tree replace_inv_trees (tree *, int *, void *); 1272 1273 extern bool reject_gcc_builtin (const_tree, location_t = UNKNOWN_LOCATION); 1274 extern bool valid_array_size_p (location_t, const_tree, tree, bool = true); 1275 extern void invalid_array_size_error (location_t, cst_size_error, 1276 const_tree, const_tree); 1277 1278 /* In c-warn.c. */ 1279 extern void constant_expression_warning (tree); 1280 extern void constant_expression_error (tree); 1281 extern void overflow_warning (location_t, tree, tree = NULL_TREE); 1282 extern void warn_logical_operator (location_t, enum tree_code, tree, 1283 enum tree_code, tree, enum tree_code, tree); 1284 extern void warn_tautological_cmp (const op_location_t &, enum tree_code, 1285 tree, tree); 1286 extern void warn_logical_not_parentheses (location_t, enum tree_code, tree, 1287 tree); 1288 extern bool warn_if_unused_value (const_tree, location_t); 1289 extern bool strict_aliasing_warning (location_t, tree, tree); 1290 extern void sizeof_pointer_memaccess_warning (location_t *, tree, 1291 vec<tree, va_gc> *, tree *, 1292 bool (*) (tree, tree)); 1293 extern void check_main_parameter_types (tree decl); 1294 extern void warnings_for_convert_and_check (location_t, tree, tree, tree); 1295 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree, bool); 1296 extern void warn_for_omitted_condop (location_t, tree); 1297 extern bool warn_for_restrict (unsigned, tree *, unsigned); 1298 extern void warn_for_address_or_pointer_of_packed_member (tree, tree); 1299 1300 /* Places where an lvalue, or modifiable lvalue, may be required. 1301 Used to select diagnostic messages in lvalue_error and 1302 readonly_error. */ 1303 enum lvalue_use { 1304 lv_assign, 1305 lv_increment, 1306 lv_decrement, 1307 lv_addressof, 1308 lv_asm 1309 }; 1310 1311 extern void lvalue_error (location_t, enum lvalue_use); 1312 extern void invalid_indirection_error (location_t, tree, ref_operator); 1313 extern void readonly_error (location_t, tree, enum lvalue_use); 1314 extern void warn_array_subscript_with_type_char (location_t, tree); 1315 extern void warn_about_parentheses (location_t, 1316 enum tree_code, 1317 enum tree_code, tree, 1318 enum tree_code, tree); 1319 extern void warn_for_unused_label (tree label); 1320 extern void warn_for_div_by_zero (location_t, tree divisor); 1321 extern void warn_for_memset (location_t, tree, tree, int); 1322 extern void warn_for_sign_compare (location_t, 1323 tree orig_op0, tree orig_op1, 1324 tree op0, tree op1, 1325 tree result_type, 1326 enum tree_code resultcode); 1327 extern void do_warn_double_promotion (tree, tree, tree, const char *, 1328 location_t); 1329 extern void do_warn_unused_parameter (tree); 1330 extern void record_locally_defined_typedef (tree); 1331 extern void maybe_record_typedef_use (tree); 1332 extern void maybe_warn_unused_local_typedefs (void); 1333 extern void maybe_warn_bool_compare (location_t, enum tree_code, tree, tree); 1334 extern bool maybe_warn_shift_overflow (location_t, tree, tree); 1335 extern void warn_duplicated_cond_add_or_warn (location_t, tree, vec<tree> **); 1336 extern bool diagnose_mismatched_attributes (tree, tree); 1337 extern tree do_warn_duplicated_branches_r (tree *, int *, void *); 1338 extern void warn_for_multistatement_macros (location_t, location_t, 1339 location_t, enum rid); 1340 1341 /* In c-attribs.c. */ 1342 extern bool attribute_takes_identifier_p (const_tree); 1343 extern tree handle_unused_attribute (tree *, tree, tree, int, bool *); 1344 extern int parse_tm_stmt_attr (tree, int); 1345 extern int tm_attr_to_mask (tree); 1346 extern tree tm_mask_to_attr (int); 1347 extern tree find_tm_attribute (tree); 1348 extern const struct attribute_spec::exclusions attr_cold_hot_exclusions[]; 1349 1350 /* In c-format.c. */ 1351 extern bool valid_format_string_type_p (tree); 1352 1353 /* A bitmap of flags to positional_argument. */ 1354 enum posargflags { 1355 /* Consider positional attribute argument value zero valid. */ 1356 POSARG_ZERO = 1, 1357 /* Consider positional attribute argument value valid if it refers 1358 to the ellipsis (i.e., beyond the last typed argument). */ 1359 POSARG_ELLIPSIS = 2 1360 }; 1361 1362 extern tree positional_argument (const_tree, const_tree, tree, tree_code, 1363 int = 0, int = posargflags ()); 1364 1365 extern enum flt_eval_method 1366 excess_precision_mode_join (enum flt_eval_method, enum flt_eval_method); 1367 1368 extern int c_flt_eval_method (bool ts18661_p); 1369 extern void add_no_sanitize_value (tree node, unsigned int flags); 1370 1371 extern void maybe_add_include_fixit (rich_location *, const char *, bool); 1372 extern void maybe_suggest_missing_token_insertion (rich_location *richloc, 1373 enum cpp_ttype token_type, 1374 location_t prev_token_loc); 1375 extern tree braced_lists_to_strings (tree, tree); 1376 1377 extern bool has_attribute (location_t, tree, tree, tree (*)(tree)); 1378 1379 #if CHECKING_P 1380 namespace selftest { 1381 /* Declarations for specific families of tests within c-family, 1382 by source file, in alphabetical order. */ 1383 extern void c_format_c_tests (void); 1384 extern void c_indentation_c_tests (void); 1385 extern void c_pretty_print_c_tests (void); 1386 extern void c_spellcheck_cc_tests (void); 1387 1388 /* The entrypoint for running all of the above tests. */ 1389 extern void c_family_tests (void); 1390 } // namespace selftest 1391 #endif /* #if CHECKING_P */ 1392 1393 #endif /* ! GCC_C_COMMON_H */ 1394