gcc/c-family/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987-2017 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
  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 \
  36 In order for the format checking to accept the C front end diagnostic \
  37 framework extensions, you must include this file before diagnostic-core.h \
  38 never 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
  62 enum 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   /* Cilk Plus keywords.  */
 188   RID_CILK_SPAWN, RID_CILK_SYNC, RID_CILK_FOR,
 189
 190   /* Objective-C ("AT" reserved words - they are only keywords when
 191      they follow '@')  */
 192   RID_AT_ENCODE,   RID_AT_END,
 193   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 194   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,  RID_AT_PACKAGE,
 195   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 196   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 197   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 198   RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
 199   RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
 200   RID_AT_INTERFACE,
 201   RID_AT_IMPLEMENTATION,
 202
 203   /* Named address support, mapping the keyword to a particular named address
 204      number.  Named address space 0 is reserved for the generic address.  If
 205      there are more than 254 named addresses, the addr_space_t type will need
 206      to be grown from an unsigned char to unsigned short.  */
 207   RID_ADDR_SPACE_0,             /* generic address */
 208   RID_ADDR_SPACE_1,
 209   RID_ADDR_SPACE_2,
 210   RID_ADDR_SPACE_3,
 211   RID_ADDR_SPACE_4,
 212   RID_ADDR_SPACE_5,
 213   RID_ADDR_SPACE_6,
 214   RID_ADDR_SPACE_7,
 215   RID_ADDR_SPACE_8,
 216   RID_ADDR_SPACE_9,
 217   RID_ADDR_SPACE_10,
 218   RID_ADDR_SPACE_11,
 219   RID_ADDR_SPACE_12,
 220   RID_ADDR_SPACE_13,
 221   RID_ADDR_SPACE_14,
 222   RID_ADDR_SPACE_15,
 223
 224   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 225   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 226
 227   /* __intN keywords.  The _N_M here doesn't correspond to the intN
 228      in the keyword; use the bitsize in int_n_t_data_t[M] for that.
 229      For example, if int_n_t_data_t[0].bitsize is 13, then RID_INT_N_0
 230      is for __int13.  */
 231
 232   /* Note that the range to use is RID_FIRST_INT_N through
 233      RID_FIRST_INT_N + NUM_INT_N_ENTS - 1 and c-parser.c has a list of
 234      all RID_INT_N_* in a case statement.  */
 235
 236   RID_INT_N_0,
 237   RID_INT_N_1,
 238   RID_INT_N_2,
 239   RID_INT_N_3,
 240
 241   RID_FIRST_INT_N = RID_INT_N_0,
 242   RID_LAST_INT_N = RID_INT_N_3,
 243
 244   RID_MAX,
 245
 246   RID_FIRST_MODIFIER = RID_STATIC,
 247   RID_LAST_MODIFIER = RID_ONEWAY,
 248
 249   RID_FIRST_CXX11 = RID_CONSTEXPR,
 250   RID_LAST_CXX11 = RID_STATIC_ASSERT,
 251   RID_FIRST_AT = RID_AT_ENCODE,
 252   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 253   RID_FIRST_PQ = RID_IN,
 254   RID_LAST_PQ = RID_ONEWAY,
 255   RID_FIRST_PATTR = RID_GETTER,
 256   RID_LAST_PATTR = RID_NONATOMIC
 257 };
 258
 259 #define OBJC_IS_AT_KEYWORD(rid) \
 260   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 261    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 262
 263 #define OBJC_IS_PQ_KEYWORD(rid) \
 264   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 265    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 266
 267 #define OBJC_IS_PATTR_KEYWORD(rid) \
 268   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
 269    (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
 270
 271 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
 272    'class') which are shared in a subtle way between Objective-C and
 273    C++.  When the lexer is lexing in Objective-C/Objective-C++, if it
 274    finds '@' followed by one of these identifiers (eg, '@class'), it
 275    recognizes the whole as an Objective-C keyword.  If the identifier
 276    is found elsewhere, it follows the rules of the C/C++ language.
 277  */
 278 #define OBJC_IS_CXX_KEYWORD(rid) \
 279   (rid == RID_CLASS || rid == RID_SYNCHRONIZED                  \
 280    || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE   \
 281    || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
 282
 283 /* The elements of `ridpointers' are identifier nodes for the reserved
 284    type names and storage classes.  It is indexed by a RID_... value.  */
 285 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 286
 287 /* Standard named or nameless data types of the C compiler.  */
 288
 289 enum c_tree_index
 290 {
 291     CTI_CHAR16_TYPE,
 292     CTI_CHAR32_TYPE,
 293     CTI_WCHAR_TYPE,
 294     CTI_UNDERLYING_WCHAR_TYPE,
 295     CTI_WINT_TYPE,
 296     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 297     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 298     CTI_INTMAX_TYPE,
 299     CTI_UINTMAX_TYPE,
 300     CTI_WIDEST_INT_LIT_TYPE,
 301     CTI_WIDEST_UINT_LIT_TYPE,
 302
 303     /* Types for <stdint.h>, that may not be defined on all
 304        targets.  */
 305     CTI_SIG_ATOMIC_TYPE,
 306     CTI_INT8_TYPE,
 307     CTI_INT16_TYPE,
 308     CTI_INT32_TYPE,
 309     CTI_INT64_TYPE,
 310     CTI_UINT8_TYPE,
 311     CTI_UINT16_TYPE,
 312     CTI_UINT32_TYPE,
 313     CTI_UINT64_TYPE,
 314     CTI_INT_LEAST8_TYPE,
 315     CTI_INT_LEAST16_TYPE,
 316     CTI_INT_LEAST32_TYPE,
 317     CTI_INT_LEAST64_TYPE,
 318     CTI_UINT_LEAST8_TYPE,
 319     CTI_UINT_LEAST16_TYPE,
 320     CTI_UINT_LEAST32_TYPE,
 321     CTI_UINT_LEAST64_TYPE,
 322     CTI_INT_FAST8_TYPE,
 323     CTI_INT_FAST16_TYPE,
 324     CTI_INT_FAST32_TYPE,
 325     CTI_INT_FAST64_TYPE,
 326     CTI_UINT_FAST8_TYPE,
 327     CTI_UINT_FAST16_TYPE,
 328     CTI_UINT_FAST32_TYPE,
 329     CTI_UINT_FAST64_TYPE,
 330     CTI_INTPTR_TYPE,
 331     CTI_UINTPTR_TYPE,
 332
 333     CTI_CHAR_ARRAY_TYPE,
 334     CTI_CHAR16_ARRAY_TYPE,
 335     CTI_CHAR32_ARRAY_TYPE,
 336     CTI_WCHAR_ARRAY_TYPE,
 337     CTI_STRING_TYPE,
 338     CTI_CONST_STRING_TYPE,
 339
 340     /* Type for boolean expressions (bool in C++, int in C).  */
 341     CTI_TRUTHVALUE_TYPE,
 342     CTI_TRUTHVALUE_TRUE,
 343     CTI_TRUTHVALUE_FALSE,
 344
 345     CTI_DEFAULT_FUNCTION_TYPE,
 346
 347     /* These are not types, but we have to look them up all the time.  */
 348     CTI_FUNCTION_NAME_DECL,
 349     CTI_PRETTY_FUNCTION_NAME_DECL,
 350     CTI_C99_FUNCTION_NAME_DECL,
 351     CTI_SAVED_FUNCTION_NAME_DECLS,
 352
 353     CTI_NULL,
 354
 355     CTI_MAX
 356 };
 357
 358 #define C_CPP_HASHNODE(id) \
 359   (&(((struct c_common_identifier *) (id))->node))
 360 #define C_RID_CODE(id) \
 361   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 362 #define C_SET_RID_CODE(id, code) \
 363   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 364
 365 /* Identifier part common to the C front ends.  Inherits from
 366    tree_identifier, despite appearances.  */
 367 struct GTY(()) c_common_identifier {
 368   struct tree_common common;
 369   struct cpp_hashnode node;
 370 };
 371
 372 /* An entry in the reserved keyword table.  */
 373
 374 struct c_common_resword
 375 {
 376   const char *const word;
 377   ENUM_BITFIELD(rid) const rid : 16;
 378   const unsigned int disable   : 16;
 379 };
 380
 381 /* Mode used to build pointers (VOIDmode means ptr_mode).  */
 382
 383 extern machine_mode c_default_pointer_mode;
 384
 385 /* Extra cpp_ttype values for C++.  */
 386
 387 /* A token type for template-ids.  If a template-id is processed while
 388    parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
 389    the value of the CPP_TEMPLATE_ID is whatever was returned by
 390    cp_parser_template_id.  */
 391 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
 392
 393 /* A token type for nested-name-specifiers.  If a
 394    nested-name-specifier is processed while parsing tentatively, it is
 395    replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
 396    CPP_NESTED_NAME_SPECIFIER is whatever was returned by
 397    cp_parser_nested_name_specifier_opt.  */
 398 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
 399
 400 /* A token type for pre-parsed C++0x decltype.  */
 401 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
 402
 403 /* A token type for pre-parsed primary-expression (lambda- or statement-).  */
 404 #define CPP_PREPARSED_EXPR ((enum cpp_ttype) (CPP_DECLTYPE + 1))
 405
 406 /* The number of token types, including C++-specific ones.  */
 407 #define N_CP_TTYPES ((int) (CPP_PREPARSED_EXPR + 1))
 408
 409 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 410    mask) is _true_.  Thus for keywords which are present in all
 411    languages the disable field is zero.  */
 412
 413 #define D_CONLY         0x001   /* C only (not in C++).  */
 414 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 415 #define D_C99           0x004   /* In C, C99 only.  */
 416 #define D_CXX11         0x008   /* In C++, C++11 only.  */
 417 #define D_EXT           0x010   /* GCC extension.  */
 418 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 419 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 420 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 421 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 422 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 423 #define D_CXX_CONCEPTS  0x400   /* In C++, only with concepts. */
 424 #define D_TRANSMEM      0X800   /* C++ transactional memory TS.  */
 425
 426 #define D_CXX_CONCEPTS_FLAGS D_CXXONLY | D_CXX_CONCEPTS
 427
 428 /* The reserved keyword table.  */
 429 extern const struct c_common_resword c_common_reswords[];
 430
 431 /* The number of items in the reserved keyword table.  */
 432 extern const unsigned int num_c_common_reswords;
 433
 434 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 435 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 436 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 437 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 438 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 439 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 440 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 441 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 442 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 443 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 444 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 445
 446 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 447 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 448 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 449 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 450 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 451 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 452 #define c_uint16_type_node              c_global_trees[CTI_UINT16_TYPE]
 453 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 454 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 455 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 456 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 457 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 458 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 459 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 460 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 461 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 462 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 463 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 464 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 465 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 466 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 467 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 468 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 469 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 470 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 471 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 472 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 473
 474 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 475 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 476 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 477
 478 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 479 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 480 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 481 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 482 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 483 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 484
 485 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 486
 487 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 488 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 489 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 490 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 491
 492 /* The node for C++ `__null'.  */
 493 #define null_node                       c_global_trees[CTI_NULL]
 494
 495 extern GTY(()) tree c_global_trees[CTI_MAX];
 496
 497 /* Mark which labels are explicitly declared.
 498    These may be shadowed, and may be referenced from nested functions.  */
 499 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 500
 501 enum c_language_kind
 502 {
 503   clk_c         = 0,            /* C90, C94, C99 or C11 */
 504   clk_objc      = 1,            /* clk_c with ObjC features.  */
 505   clk_cxx       = 2,            /* ANSI/ISO C++ */
 506   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 507 };
 508
 509 /* To test for a specific language use c_language, defined by each
 510    front end.  For "ObjC features" or "not C++" use the macros.  */
 511 extern c_language_kind c_language;
 512
 513 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 514 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 515
 516 /* The various name of operator that appears in error messages. */
 517 enum ref_operator {
 518   /* NULL */
 519   RO_NULL,
 520   /* array indexing */
 521   RO_ARRAY_INDEXING,
 522   /* unary * */
 523   RO_UNARY_STAR,
 524   /* -> */
 525   RO_ARROW,
 526   /* implicit conversion */
 527   RO_IMPLICIT_CONVERSION,
 528   /* ->* */
 529   RO_ARROW_STAR
 530 };
 531
 532 /* Information about a statement tree.  */
 533
 534 struct GTY(()) stmt_tree_s {
 535   /* A stack of statement lists being collected.  */
 536   vec<tree, va_gc> *x_cur_stmt_list;
 537
 538   /* In C++, Nonzero if we should treat statements as full
 539      expressions.  In particular, this variable is non-zero if at the
 540      end of a statement we should destroy any temporaries created
 541      during that statement.  Similarly, if, at the end of a block, we
 542      should destroy any local variables in this block.  Normally, this
 543      variable is nonzero, since those are the normal semantics of
 544      C++.
 545
 546      This flag has no effect in C.  */
 547   int stmts_are_full_exprs_p;
 548 };
 549
 550 typedef struct stmt_tree_s *stmt_tree;
 551
 552 /* Global state pertinent to the current function.  Some C dialects
 553    extend this structure with additional fields.  */
 554
 555 struct GTY(()) c_language_function {
 556   /* While we are parsing the function, this contains information
 557      about the statement-tree that we are building.  */
 558   struct stmt_tree_s x_stmt_tree;
 559
 560   /* Vector of locally defined typedefs, for
 561      -Wunused-local-typedefs.  */
 562   vec<tree, va_gc> *local_typedefs;
 563 };
 564
 565 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
 566
 567 /* When building a statement-tree, this is the current statement list
 568    being collected.  */
 569 #define cur_stmt_list   (stmt_list_stack->last ())
 570
 571 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
 572
 573 /* Language-specific hooks.  */
 574
 575 /* If non-NULL, this function is called after a precompile header file
 576    is loaded.  */
 577 extern void (*lang_post_pch_load) (void);
 578
 579 extern void push_file_scope (void);
 580 extern void pop_file_scope (void);
 581 extern stmt_tree current_stmt_tree (void);
 582 extern tree push_stmt_list (void);
 583 extern tree pop_stmt_list (tree);
 584 extern tree add_stmt (tree);
 585 extern void push_cleanup (tree, tree, bool);
 586
 587 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 588                                location_t, tree, tree);
 589 extern tree build_array_notation_expr (location_t, tree, tree, enum tree_code,
 590                                        location_t, tree, tree);
 591 extern tree build_array_notation_ref (location_t, tree, tree, tree, tree, tree);
 592 extern tree build_indirect_ref (location_t, tree, ref_operator);
 593
 594 extern bool has_c_linkage (const_tree decl);
 595 extern bool c_decl_implicit (const_tree);
 596 \f
 597 /* Switches common to the C front ends.  */
 598
 599 /* Nonzero means don't output line number information.  */
 600
 601 extern char flag_no_line_commands;
 602
 603 /* Nonzero causes -E output not to be done, but directives such as
 604    #define that have side effects are still obeyed.  */
 605
 606 extern char flag_no_output;
 607
 608 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 609    'N' or 'U' of the command line switch.  */
 610
 611 extern char flag_dump_macros;
 612
 613 /* Nonzero means pass #include lines through to the output.  */
 614
 615 extern char flag_dump_includes;
 616
 617 /* Nonzero means process PCH files while preprocessing.  */
 618
 619 extern bool flag_pch_preprocess;
 620
 621 /* The file name to which we should write a precompiled header, or
 622    NULL if no header will be written in this compile.  */
 623
 624 extern const char *pch_file;
 625
 626 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 627    user's namespace.  */
 628
 629 extern int flag_iso;
 630
 631 /* C/ObjC language option variables.  */
 632
 633
 634 /* Nonzero means allow type mismatches in conditional expressions;
 635    just make their values `void'.  */
 636
 637 extern int flag_cond_mismatch;
 638
 639 /* Nonzero means enable C89 Amendment 1 features.  */
 640
 641 extern int flag_isoc94;
 642
 643 /* Nonzero means use the ISO C99 (or C11) dialect of C.  */
 644
 645 extern int flag_isoc99;
 646
 647 /* Nonzero means use the ISO C11 dialect of C.  */
 648
 649 extern int flag_isoc11;
 650
 651 /* Nonzero means that we have builtin functions, and main is an int.  */
 652
 653 extern int flag_hosted;
 654
 655 /* ObjC language option variables.  */
 656
 657
 658 /* Tells the compiler that this is a special run.  Do not perform any
 659    compiling, instead we are to test some platform dependent features
 660    and output a C header file with appropriate definitions.  */
 661
 662 extern int print_struct_values;
 663
 664 /* Tells the compiler what is the constant string class for ObjC.  */
 665
 666 extern const char *constant_string_class_name;
 667
 668
 669 /* C++ language option variables.  */
 670
 671 /* The reference version of the ABI for -Wabi.  */
 672
 673 extern int warn_abi_version;
 674
 675 /* Return TRUE if one of {flag_abi_version,flag_abi_compat_version} is
 676    less than N and the other is at least N.  */
 677 #define abi_compat_version_crosses(N)           \
 678   (abi_version_at_least(N)                      \
 679    != (flag_abi_compat_version == 0             \
 680        || flag_abi_compat_version >= (N)))
 681
 682 /* Return TRUE if one of {flag_abi_version,warn_abi_version} is
 683    less than N and the other is at least N, for use by -Wabi.  */
 684 #define abi_version_crosses(N)                  \
 685   (abi_version_at_least(N)                      \
 686    != (warn_abi_version == 0                    \
 687        || warn_abi_version >= (N)))
 688
 689 /* Nonzero means generate separate instantiation control files and
 690    juggle them at link time.  */
 691
 692 extern int flag_use_repository;
 693
 694 /* The supported C++ dialects.  */
 695
 696 enum cxx_dialect {
 697   cxx_unset,
 698   /* C++98 with TC1  */
 699   cxx98,
 700   cxx03 = cxx98,
 701   /* C++11  */
 702   cxx0x,
 703   cxx11 = cxx0x,
 704   /* C++14 */
 705   cxx14,
 706   /* C++17 */
 707   cxx17,
 708   /* C++2a (C++20?) */
 709   cxx2a
 710 };
 711
 712 /* The C++ dialect being used. C++98 is the default.  */
 713 extern enum cxx_dialect cxx_dialect;
 714
 715 /* Maximum template instantiation depth.  This limit is rather
 716    arbitrary, but it exists to limit the time it takes to notice
 717    excessively recursive template instantiations.  */
 718
 719 extern int max_tinst_depth;
 720
 721 /* Nonzero means that we should not issue warnings about problems that
 722    occur when the code is executed, because the code being processed
 723    is not expected to be executed.  This is set during parsing.  This
 724    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 725    not a bool, because unexecuted expressions can nest.  */
 726
 727 extern int c_inhibit_evaluation_warnings;
 728
 729 /* Whether lexing has been completed, so subsequent preprocessor
 730    errors should use the compiler's input_location.  */
 731
 732 extern bool done_lexing;
 733
 734 /* C types are partitioned into three subsets: object, function, and
 735    incomplete types.  */
 736 #define C_TYPE_OBJECT_P(type) \
 737   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 738
 739 #define C_TYPE_INCOMPLETE_P(type) \
 740   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 741
 742 #define C_TYPE_FUNCTION_P(type) \
 743   (TREE_CODE (type) == FUNCTION_TYPE)
 744
 745 /* For convenience we define a single macro to identify the class of
 746    object or incomplete types.  */
 747 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 748   (!C_TYPE_FUNCTION_P (type))
 749
 750 struct visibility_flags
 751 {
 752   unsigned inpragma : 1;        /* True when in #pragma GCC visibility.  */
 753   unsigned inlines_hidden : 1;  /* True when -finlineshidden in effect.  */
 754 };
 755
 756 /* These enumerators are possible types of unsafe conversions.  */
 757 enum conversion_safety {
 758   /* The conversion is safe.  */
 759   SAFE_CONVERSION = 0,
 760   /* Another type of conversion with problems.  */
 761   UNSAFE_OTHER,
 762   /* Conversion between signed and unsigned integers
 763      which are all warned about immediately, so this is unused.  */
 764   UNSAFE_SIGN,
 765   /* Conversions that reduce the precision of reals including conversions
 766      from reals to integers.  */
 767   UNSAFE_REAL,
 768   /* Conversions from complex to reals or integers, that discard imaginary
 769      component.  */
 770   UNSAFE_IMAGINARY
 771 };
 772
 773 /* Global visibility options.  */
 774 extern struct visibility_flags visibility_options;
 775
 776 /* Attribute table common to the C front ends.  */
 777 extern const struct attribute_spec c_common_attribute_table[];
 778 extern const struct attribute_spec c_common_format_attribute_table[];
 779
 780 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 781    ID is the identifier to use, NAME is the string.
 782    TYPE_DEP indicates whether it depends on type of the function or not
 783    (i.e. __PRETTY_FUNCTION__).  */
 784
 785 extern tree (*make_fname_decl) (location_t, tree, int);
 786
 787 /* In c-decl.c and cp/tree.c.  FIXME.  */
 788 extern void c_register_addr_space (const char *str, addr_space_t as);
 789
 790 /* In c-common.c.  */
 791 extern bool in_late_binary_op;
 792 extern const char *c_addr_space_name (addr_space_t as);
 793 extern tree identifier_global_value (tree);
 794 extern tree c_linkage_bindings (tree);
 795 extern void record_builtin_type (enum rid, const char *, tree);
 796 extern tree build_void_list_node (void);
 797 extern void start_fname_decls (void);
 798 extern void finish_fname_decls (void);
 799 extern const char *fname_as_string (int);
 800 extern tree fname_decl (location_t, unsigned, tree);
 801
 802 extern int check_user_alignment (const_tree, bool);
 803 extern bool check_function_arguments (location_t loc, const_tree, const_tree,
 804                                       int, tree *, vec<location_t> *);
 805 extern void check_function_arguments_recurse (void (*)
 806                                               (void *, tree,
 807                                                unsigned HOST_WIDE_INT),
 808                                               void *, tree,
 809                                               unsigned HOST_WIDE_INT);
 810 extern bool check_builtin_function_arguments (location_t, vec<location_t>,
 811                                               tree, int, tree *);
 812 extern void check_function_format (tree, int, tree *, vec<location_t> *);
 813 extern bool attribute_fallthrough_p (tree);
 814 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 815 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 816 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
 817                                     const struct cl_option_handlers *);
 818 extern bool default_handle_c_option (size_t, const char *, int);
 819 extern tree c_common_type_for_mode (machine_mode, int);
 820 extern tree c_common_type_for_size (unsigned int, int);
 821 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 822                                                 int, int);
 823 extern tree c_common_unsigned_type (tree);
 824 extern tree c_common_signed_type (tree);
 825 extern tree c_common_signed_or_unsigned_type (int, tree);
 826 extern void c_common_init_ts (void);
 827 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 828 extern enum conversion_safety unsafe_conversion_p (location_t, tree, tree, tree,
 829                                                    bool);
 830 extern bool decl_with_nonnull_addr_p (const_tree);
 831 extern tree c_fully_fold (tree, bool, bool *, bool = false);
 832 extern tree c_wrap_maybe_const (tree, bool);
 833 extern tree c_common_truthvalue_conversion (location_t, tree);
 834 extern void c_apply_type_quals_to_decl (int, tree);
 835 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, bool, int);
 836 extern tree c_alignof_expr (location_t, tree);
 837 /* Print an error message for invalid operands to arith operation CODE.
 838    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 839 extern void binary_op_error (rich_location *, enum tree_code, tree, tree);
 840 extern tree fix_string_type (tree);
 841 extern tree convert_and_check (location_t, tree, tree);
 842 extern bool c_determine_visibility (tree);
 843 extern bool vector_types_compatible_elements_p (tree, tree);
 844 extern void mark_valid_location_for_stdc_pragma (bool);
 845 extern bool valid_location_for_stdc_pragma_p (void);
 846 extern void set_float_const_decimal64 (void);
 847 extern void clear_float_const_decimal64 (void);
 848 extern bool float_const_decimal64_p (void);
 849
 850 extern bool keyword_begins_type_specifier (enum rid);
 851 extern bool keyword_is_storage_class_specifier (enum rid);
 852 extern bool keyword_is_type_qualifier (enum rid);
 853 extern bool keyword_is_decl_specifier (enum rid);
 854 extern unsigned max_align_t_align (void);
 855 extern bool cxx_fundamental_alignment_p (unsigned);
 856 extern bool pointer_to_zero_sized_aggr_p (tree);
 857 extern bool bool_promoted_to_int_p (tree);
 858 extern tree fold_for_warn (tree);
 859 extern tree c_common_get_narrower (tree, int *);
 860 extern bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *);
 861
 862 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, false, 1)
 863 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, false, 1)
 864
 865 /* Subroutine of build_binary_op, used for certain operations.  */
 866 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 867
 868 /* Subroutine of build_binary_op, used for comparison operations.
 869    See if the operands have both been converted from subword integer types
 870    and, if so, perhaps change them both back to their original type.  */
 871 extern tree shorten_compare (location_t, tree *, tree *, tree *,
 872                              enum tree_code *);
 873
 874 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree,
 875                              bool = true);
 876
 877 /* Add qualifiers to a type, in the fashion for C.  */
 878 extern tree c_build_qualified_type (tree, int, tree = NULL_TREE, size_t = 0);
 879
 880 /* Build tree nodes and builtin functions common to both C and C++ language
 881    frontends.  */
 882 extern void c_common_nodes_and_builtins (void);
 883
 884 extern void disable_builtin_function (const char *);
 885
 886 extern void set_compound_literal_name (tree decl);
 887
 888 extern tree build_va_arg (location_t, tree, tree);
 889
 890 extern const unsigned int c_family_lang_mask;
 891 extern unsigned int c_common_option_lang_mask (void);
 892 extern void c_common_diagnostics_set_defaults (diagnostic_context *);
 893 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
 894 extern void c_common_init_options_struct (struct gcc_options *);
 895 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
 896 extern bool c_common_post_options (const char **);
 897 extern bool c_common_init (void);
 898 extern void c_common_finish (void);
 899 extern void c_common_parse_file (void);
 900 extern FILE *get_dump_info (int, dump_flags_t *);
 901 extern alias_set_type c_common_get_alias_set (tree);
 902 extern void c_register_builtin_type (tree, const char*);
 903 extern bool c_promoting_integer_type_p (const_tree);
 904 extern bool self_promoting_args_p (const_tree);
 905 extern tree strip_pointer_operator (tree);
 906 extern tree strip_pointer_or_array_types (tree);
 907 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 908
 909 /* This is the basic parsing function.  */
 910 extern void c_parse_file (void);
 911
 912 extern void c_parse_final_cleanups (void);
 913
 914 /* These macros provide convenient access to the various _STMT nodes.  */
 915
 916 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 917    if a statement expression.  */
 918 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 919   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 920
 921 /* Nonzero if a label has been added to the statement list.  */
 922 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 923   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 924
 925 /* C_MAYBE_CONST_EXPR accessors.  */
 926 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 927   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 928 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 929   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 930 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 931   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 932 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 933   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 934 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 935   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 936    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 937        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 938            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 939
 940 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 941 #define DECL_C_BIT_FIELD(NODE) \
 942   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 943 #define SET_DECL_C_BIT_FIELD(NODE) \
 944   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 945 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 946   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 947
 948 extern tree do_case (location_t, tree, tree);
 949 extern tree build_stmt (location_t, enum tree_code, ...);
 950 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
 951
 952 /* These functions must be defined by each front-end which implements
 953    a variant of the C language.  They are used in c-common.c.  */
 954
 955 extern tree build_unary_op (location_t, enum tree_code, tree, bool);
 956 extern tree build_binary_op (location_t, enum tree_code, tree, tree, bool);
 957 extern tree perform_integral_promotions (tree);
 958
 959 /* These functions must be defined by each front-end which implements
 960    a variant of the C language.  They are used by port files.  */
 961
 962 extern tree default_conversion (tree);
 963
 964 /* Given two integer or real types, return the type for their sum.
 965    Given two compatible ANSI C types, returns the merged type.  */
 966
 967 extern tree common_type (tree, tree);
 968
 969 extern tree decl_constant_value (tree);
 970
 971 /* Handle increment and decrement of boolean types.  */
 972 extern tree boolean_increment (enum tree_code, tree);
 973
 974 extern int case_compare (splay_tree_key, splay_tree_key);
 975
 976 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree,
 977                               bool *);
 978
 979 extern tree build_function_call (location_t, tree, tree);
 980
 981 extern tree build_function_call_vec (location_t, vec<location_t>, tree,
 982                                      vec<tree, va_gc> *, vec<tree, va_gc> *);
 983
 984 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
 985
 986 extern tree finish_label_address_expr (tree, location_t);
 987
 988 /* Same function prototype, but the C and C++ front ends have
 989    different implementations.  Used in c-common.c.  */
 990 extern tree lookup_label (tree);
 991 extern tree lookup_name (tree);
 992 extern bool lvalue_p (const_tree);
 993
 994 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 995 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 996 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true);
 997
 998 extern void init_c_lex (void);
 999
1000 extern void c_cpp_builtins (cpp_reader *);
1001 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
1002 extern bool c_cpp_error (cpp_reader *, int, int, rich_location *,
1003                          const char *, va_list *)
1004      ATTRIBUTE_GCC_DIAG(5,0);
1005 extern int c_common_has_attribute (cpp_reader *);
1006
1007 extern bool parse_optimize_options (tree, bool);
1008
1009 /* Positive if an implicit `extern "C"' scope has just been entered;
1010    negative if such a scope has just been exited.  */
1011 extern GTY(()) int pending_lang_change;
1012
1013 /* Information recorded about each file examined during compilation.  */
1014
1015 struct c_fileinfo
1016 {
1017   int time;     /* Time spent in the file.  */
1018
1019   /* Flags used only by C++.
1020      INTERFACE_ONLY nonzero means that we are in an "interface" section
1021      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
1022      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
1023      INTERFACE_ONLY is zero, it means that we are responsible for
1024      exporting definitions that others might need.  */
1025   short interface_only;
1026   short interface_unknown;
1027 };
1028
1029 struct c_fileinfo *get_fileinfo (const char *);
1030 extern void dump_time_statistics (void);
1031
1032 extern bool c_dump_tree (void *, tree);
1033
1034 extern void verify_sequence_points (tree);
1035
1036 extern tree fold_offsetof_1 (tree, tree_code ctx = ERROR_MARK);
1037 extern tree fold_offsetof (tree);
1038
1039 extern int complete_array_type (tree *, tree, bool);
1040
1041 extern tree builtin_type_for_size (int, bool);
1042
1043 extern void c_common_mark_addressable_vec (tree);
1044
1045 extern void set_underlying_type (tree);
1046 extern void record_types_used_by_current_var_decl (tree);
1047 extern vec<tree, va_gc> *make_tree_vector (void);
1048 extern void release_tree_vector (vec<tree, va_gc> *);
1049 extern vec<tree, va_gc> *make_tree_vector_single (tree);
1050 extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1051 extern vec<tree, va_gc> *make_tree_vector_from_ctor (tree);
1052 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1053
1054 /* Used for communication between c_common_type_for_mode and
1055    c_register_builtin_type.  */
1056 extern GTY(()) tree registered_builtin_types;
1057
1058 /* Read SOURCE_DATE_EPOCH from environment to have a deterministic
1059    timestamp to replace embedded current dates to get reproducible
1060    results.  Returns -1 if SOURCE_DATE_EPOCH is not defined.  */
1061 extern time_t cb_get_source_date_epoch (cpp_reader *pfile);
1062
1063 /* The value (as a unix timestamp) corresponds to date
1064    "Dec 31 9999 23:59:59 UTC", which is the latest date that __DATE__ and
1065    __TIME__ can store.  */
1066 #define MAX_SOURCE_DATE_EPOCH HOST_WIDE_INT_C (253402300799)
1067
1068 /* Callback for libcpp for offering spelling suggestions for misspelled
1069    directives.  */
1070 extern const char *cb_get_suggestion (cpp_reader *, const char *,
1071                                       const char *const *);
1072
1073 extern GTY(()) string_concat_db *g_string_concat_db;
1074
1075 class substring_loc;
1076 extern const char *c_get_substring_location (const substring_loc &substr_loc,
1077                                              location_t *out_loc);
1078
1079 /* In c-gimplify.c  */
1080 extern void c_genericize (tree);
1081 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1082 extern tree c_build_bind_expr (location_t, tree, tree);
1083
1084 /* In c-lex.c.  */
1085 extern enum cpp_ttype
1086 conflict_marker_get_final_tok_kind (enum cpp_ttype tok1_kind);
1087
1088 /* In c-pch.c  */
1089 extern void pch_init (void);
1090 extern void pch_cpp_save_state (void);
1091 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1092 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1093                                const char *orig);
1094 extern void c_common_write_pch (void);
1095 extern void c_common_no_more_pch (void);
1096 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1097
1098 /* In *-checksum.c */
1099 extern const unsigned char executable_checksum[16];
1100
1101 /* In c-cppbuiltin.c  */
1102 extern void builtin_define_std (const char *macro);
1103 extern void builtin_define_with_value (const char *, const char *, int);
1104 extern void builtin_define_with_int_value (const char *, HOST_WIDE_INT);
1105 extern void builtin_define_type_sizeof (const char *, tree);
1106 extern void c_stddef_cpp_builtins (void);
1107 extern void fe_file_change (const line_map_ordinary *);
1108 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char,
1109                            rich_location *richloc);
1110
1111 /* In c-ppoutput.c  */
1112 extern void init_pp_output (FILE *);
1113 extern void preprocess_file (cpp_reader *);
1114 extern void pp_file_change (const line_map_ordinary *);
1115 extern void pp_dir_change (cpp_reader *, const char *);
1116 extern bool check_missing_format_attribute (tree, tree);
1117
1118 /* In c-omp.c  */
1119 struct omp_clause_mask
1120 {
1121   inline omp_clause_mask ();
1122   inline omp_clause_mask (uint64_t l);
1123   inline omp_clause_mask (uint64_t l, uint64_t h);
1124   inline omp_clause_mask &operator &= (omp_clause_mask);
1125   inline omp_clause_mask &operator |= (omp_clause_mask);
1126   inline omp_clause_mask operator ~ () const;
1127   inline omp_clause_mask operator & (omp_clause_mask) const;
1128   inline omp_clause_mask operator | (omp_clause_mask) const;
1129   inline omp_clause_mask operator >> (int);
1130   inline omp_clause_mask operator << (int);
1131   inline bool operator == (omp_clause_mask) const;
1132   inline bool operator != (omp_clause_mask) const;
1133   uint64_t low, high;
1134 };
1135
1136 inline
1137 omp_clause_mask::omp_clause_mask ()
1138 {
1139 }
1140
1141 inline
1142 omp_clause_mask::omp_clause_mask (uint64_t l)
1143 : low (l), high (0)
1144 {
1145 }
1146
1147 inline
1148 omp_clause_mask::omp_clause_mask (uint64_t l, uint64_t h)
1149 : low (l), high (h)
1150 {
1151 }
1152
1153 inline omp_clause_mask &
1154 omp_clause_mask::operator &= (omp_clause_mask b)
1155 {
1156   low &= b.low;
1157   high &= b.high;
1158   return *this;
1159 }
1160
1161 inline omp_clause_mask &
1162 omp_clause_mask::operator |= (omp_clause_mask b)
1163 {
1164   low |= b.low;
1165   high |= b.high;
1166   return *this;
1167 }
1168
1169 inline omp_clause_mask
1170 omp_clause_mask::operator ~ () const
1171 {
1172   omp_clause_mask ret (~low, ~high);
1173   return ret;
1174 }
1175
1176 inline omp_clause_mask
1177 omp_clause_mask::operator | (omp_clause_mask b) const
1178 {
1179   omp_clause_mask ret (low | b.low, high | b.high);
1180   return ret;
1181 }
1182
1183 inline omp_clause_mask
1184 omp_clause_mask::operator & (omp_clause_mask b) const
1185 {
1186   omp_clause_mask ret (low & b.low, high & b.high);
1187   return ret;
1188 }
1189
1190 inline omp_clause_mask
1191 omp_clause_mask::operator << (int amount)
1192 {
1193   omp_clause_mask ret;
1194   if (amount >= 64)
1195     {
1196       ret.low = 0;
1197       ret.high = low << (amount - 64);
1198     }
1199   else if (amount == 0)
1200     ret = *this;
1201   else
1202     {
1203       ret.low = low << amount;
1204       ret.high = (low >> (64 - amount)) | (high << amount);
1205     }
1206   return ret;
1207 }
1208
1209 inline omp_clause_mask
1210 omp_clause_mask::operator >> (int amount)
1211 {
1212   omp_clause_mask ret;
1213   if (amount >= 64)
1214     {
1215       ret.low = high >> (amount - 64);
1216       ret.high = 0;
1217     }
1218   else if (amount == 0)
1219     ret = *this;
1220   else
1221     {
1222       ret.low = (high << (64 - amount)) | (low >> amount);
1223       ret.high = high >> amount;
1224     }
1225   return ret;
1226 }
1227
1228 inline bool
1229 omp_clause_mask::operator == (omp_clause_mask b) const
1230 {
1231   return low == b.low && high == b.high;
1232 }
1233
1234 inline bool
1235 omp_clause_mask::operator != (omp_clause_mask b) const
1236 {
1237   return low != b.low || high != b.high;
1238 }
1239
1240 #define OMP_CLAUSE_MASK_1 omp_clause_mask (1)
1241
1242 enum c_omp_clause_split
1243 {
1244   C_OMP_CLAUSE_SPLIT_TARGET = 0,
1245   C_OMP_CLAUSE_SPLIT_TEAMS,
1246   C_OMP_CLAUSE_SPLIT_DISTRIBUTE,
1247   C_OMP_CLAUSE_SPLIT_PARALLEL,
1248   C_OMP_CLAUSE_SPLIT_FOR,
1249   C_OMP_CLAUSE_SPLIT_SIMD,
1250   C_OMP_CLAUSE_SPLIT_COUNT,
1251   C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR,
1252   C_OMP_CLAUSE_SPLIT_TASKLOOP = C_OMP_CLAUSE_SPLIT_FOR
1253 };
1254
1255 enum c_omp_region_type
1256 {
1257   C_ORT_OMP                     = 1 << 0,
1258   C_ORT_CILK                    = 1 << 1,
1259   C_ORT_ACC                     = 1 << 2,
1260   C_ORT_DECLARE_SIMD            = 1 << 3,
1261   C_ORT_OMP_DECLARE_SIMD        = C_ORT_OMP | C_ORT_DECLARE_SIMD
1262 };
1263
1264 extern tree c_finish_omp_master (location_t, tree);
1265 extern tree c_finish_omp_taskgroup (location_t, tree);
1266 extern tree c_finish_omp_critical (location_t, tree, tree, tree);
1267 extern tree c_finish_omp_ordered (location_t, tree, tree);
1268 extern void c_finish_omp_barrier (location_t);
1269 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1270                                  tree, tree, tree, tree, tree, bool, bool,
1271                                  bool = false);
1272 extern void c_finish_omp_flush (location_t);
1273 extern void c_finish_omp_taskwait (location_t);
1274 extern void c_finish_omp_taskyield (location_t);
1275 extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree,
1276                               tree, tree, tree, tree);
1277 extern bool c_omp_check_loop_iv (tree, tree, walk_tree_lh);
1278 extern bool c_omp_check_loop_iv_exprs (location_t, tree, tree, tree, tree,
1279                                        walk_tree_lh);
1280 extern tree c_finish_oacc_wait (location_t, tree, tree);
1281 extern tree c_oacc_split_loop_clauses (tree, tree *, bool);
1282 extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask,
1283                                  tree, tree *);
1284 extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree);
1285 extern void c_omp_declare_simd_clauses_to_decls (tree, tree);
1286 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1287
1288 /* Return next tree in the chain for chain_next walking of tree nodes.  */
1289 static inline tree
1290 c_tree_chain_next (tree t)
1291 {
1292   /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1293      kind of object, never a long chain of nodes.  Prefer
1294      TYPE_NEXT_VARIANT for types.  */
1295   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1296     return TYPE_NEXT_VARIANT (t);
1297   /* Otherwise, if there is TREE_CHAIN, return it.  */
1298   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1299     return TREE_CHAIN (t);
1300   return NULL;
1301 }
1302
1303 /* Mask used by tm_stmt_attr.  */
1304 #define TM_STMT_ATTR_OUTER      2
1305 #define TM_STMT_ATTR_ATOMIC     4
1306 #define TM_STMT_ATTR_RELAXED    8
1307
1308 /* Mask used by tm_attr_to_mask and tm_mask_to_attr.  Note that these
1309    are ordered specifically such that more restrictive attributes are
1310    at lower bit positions.  This fact is known by the C++ tm attribute
1311    inheritance code such that least bit extraction (mask & -mask) results
1312    in the most restrictive attribute.  */
1313 #define TM_ATTR_SAFE                    1
1314 #define TM_ATTR_CALLABLE                2
1315 #define TM_ATTR_PURE                    4
1316 #define TM_ATTR_IRREVOCABLE             8
1317 #define TM_ATTR_MAY_CANCEL_OUTER        16
1318
1319 /* A suffix-identifier value doublet that represents user-defined literals
1320    for C++-0x.  */
1321 enum overflow_type {
1322   OT_UNDERFLOW = -1,
1323   OT_NONE,
1324   OT_OVERFLOW
1325 };
1326
1327 struct GTY(()) tree_userdef_literal {
1328   struct tree_base base;
1329   tree suffix_id;
1330   tree value;
1331   tree num_string;
1332   enum overflow_type overflow;
1333 };
1334
1335 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1336   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1337
1338 #define USERDEF_LITERAL_VALUE(NODE) \
1339   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1340
1341 #define USERDEF_LITERAL_OVERFLOW(NODE) \
1342   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1343
1344 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1345   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1346
1347 #define USERDEF_LITERAL_TYPE(NODE) \
1348   (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1349
1350 extern tree build_userdef_literal (tree suffix_id, tree value,
1351                                    enum overflow_type overflow,
1352                                    tree num_string);
1353
1354 extern bool convert_vector_to_array_for_subscript (location_t, tree *, tree);
1355
1356 /* Possibe cases of scalar_to_vector conversion.  */
1357 enum stv_conv {
1358   stv_error,        /* Error occurred.  */
1359   stv_nothing,      /* Nothing happened.  */
1360   stv_firstarg,     /* First argument must be expanded.  */
1361   stv_secondarg     /* Second argument must be expanded.  */
1362 };
1363
1364 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1365                                        tree op0, tree op1, bool);
1366
1367 /* In c-cilkplus.c  */
1368 extern tree c_validate_cilk_plus_loop (tree *, int *, void *);
1369 extern bool c_check_cilk_loop (location_t, tree);
1370
1371 /* These #defines allow users to access different operands of the
1372    array notation tree.  */
1373
1374 #define ARRAY_NOTATION_CHECK(NODE) TREE_CHECK (NODE, ARRAY_NOTATION_REF)
1375 #define ARRAY_NOTATION_ARRAY(NODE) \
1376   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 0)
1377 #define ARRAY_NOTATION_START(NODE) \
1378   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 1)
1379 #define ARRAY_NOTATION_LENGTH(NODE) \
1380   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 2)
1381 #define ARRAY_NOTATION_STRIDE(NODE) \
1382   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 3)
1383
1384 /* This structure holds all the scalar values and its appropriate variable
1385    replacment.  It is mainly used by the function that pulls all the invariant
1386    parts that should be executed only once, which comes with array notation
1387    expressions.  */
1388 struct inv_list
1389 {
1390   vec<tree, va_gc> *list_values;
1391   vec<tree, va_gc> *replacement;
1392   vec<enum tree_code, va_gc> *additional_tcodes;
1393 };
1394
1395 /* This structure holds all the important components that can be extracted
1396    from an ARRAY_NOTATION_REF expression.  It is used to pass array notation
1397    information between the functions that are responsible for expansion.  */
1398 typedef struct cilkplus_an_parts
1399 {
1400   tree value;
1401   tree start;
1402   tree length;
1403   tree stride;
1404   bool is_vector;
1405 } an_parts;
1406
1407 /* This structure holds the components necessary to create the loop around
1408    the ARRAY_REF that is created using the ARRAY_NOTATION information.  */
1409
1410 typedef struct cilkplus_an_loop_parts
1411 {
1412   tree var;         /* Loop induction variable.  */
1413   tree incr;        /* Loop increment/decrement expression.  */
1414   tree cmp;         /* Loop condition.  */
1415   tree ind_init;    /* Initialization of the loop induction variable.  */
1416 } an_loop_parts;
1417
1418 /* In array-notation-common.c.  */
1419 extern HOST_WIDE_INT extract_sec_implicit_index_arg (location_t, tree);
1420 extern bool is_sec_implicit_index_fn (tree);
1421 extern void array_notation_init_builtins (void);
1422 extern struct c_expr fix_array_notation_expr (location_t, enum tree_code,
1423                                               struct c_expr);
1424 extern bool contains_array_notation_expr (tree);
1425 extern tree expand_array_notation_exprs (tree);
1426 extern tree fix_conditional_array_notations (tree);
1427 extern tree find_correct_array_notation_type (tree);
1428 extern bool length_mismatch_in_expr_p (location_t, vec<vec<an_parts> >);
1429 extern enum built_in_function is_cilkplus_reduce_builtin (tree);
1430 extern bool find_rank (location_t, tree, tree, bool, size_t *);
1431 extern void extract_array_notation_exprs (tree, bool, vec<tree, va_gc> **);
1432 extern void replace_array_notations (tree *, bool, vec<tree, va_gc> *,
1433                                      vec<tree, va_gc> *);
1434 extern tree find_inv_trees (tree *, int *, void *);
1435 extern tree replace_inv_trees (tree *, int *, void *);
1436 extern tree find_correct_array_notation_type (tree op);
1437 extern void cilkplus_extract_an_triplets (vec<tree, va_gc> *, size_t, size_t,
1438                                           vec<vec<an_parts> > *);
1439 extern vec <tree, va_gc> *fix_sec_implicit_args
1440   (location_t, vec <tree, va_gc> *, vec<an_loop_parts>, size_t, tree);
1441 extern bool is_cilkplus_vector_p (tree);
1442
1443 /* In cilk.c.  */
1444 extern tree insert_cilk_frame (tree);
1445 extern void cilk_init_builtins (void);
1446 extern int gimplify_cilk_spawn (tree *);
1447 extern void cilk_install_body_with_frame_cleanup (tree, tree, void *);
1448 extern bool cilk_detect_spawn_and_unwrap (tree *);
1449 extern bool cilk_set_spawn_marker (location_t, tree);
1450 extern tree build_cilk_sync (void);
1451 extern tree build_cilk_spawn (location_t, tree);
1452 extern tree make_cilk_frame (tree);
1453 extern tree create_cilk_function_exit (tree, bool, bool);
1454 extern void cilk_outline (tree, tree *, void *);
1455 extern bool contains_cilk_spawn_stmt (tree);
1456 extern tree cilk_for_number_of_iterations (tree);
1457 extern bool check_no_cilk (tree, const char *, const char *,
1458                            location_t loc = UNKNOWN_LOCATION);
1459 extern bool reject_gcc_builtin (const_tree, location_t = UNKNOWN_LOCATION);
1460 extern bool valid_array_size_p (location_t, tree, tree);
1461
1462 extern bool cilk_ignorable_spawn_rhs_op (tree);
1463 extern bool cilk_recognize_spawn (tree, tree *);
1464
1465 /* In c-warn.c.  */
1466 extern void constant_expression_warning (tree);
1467 extern void constant_expression_error (tree);
1468 extern void overflow_warning (location_t, tree, tree = NULL_TREE);
1469 extern void warn_logical_operator (location_t, enum tree_code, tree,
1470                                    enum tree_code, tree, enum tree_code, tree);
1471 extern void warn_tautological_cmp (location_t, enum tree_code, tree, tree);
1472 extern void warn_logical_not_parentheses (location_t, enum tree_code, tree,
1473                                           tree);
1474 extern bool warn_if_unused_value (const_tree, location_t);
1475 extern bool strict_aliasing_warning (tree, tree, tree);
1476 extern void sizeof_pointer_memaccess_warning (location_t *, tree,
1477                                               vec<tree, va_gc> *, tree *,
1478                                               bool (*) (tree, tree));
1479 extern void check_main_parameter_types (tree decl);
1480 extern void warnings_for_convert_and_check (location_t, tree, tree, tree);
1481 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree, bool,
1482                                   bool);
1483 extern void warn_for_omitted_condop (location_t, tree);
1484 extern void warn_for_restrict (unsigned, tree *, unsigned);
1485
1486 /* Places where an lvalue, or modifiable lvalue, may be required.
1487    Used to select diagnostic messages in lvalue_error and
1488    readonly_error.  */
1489 enum lvalue_use {
1490   lv_assign,
1491   lv_increment,
1492   lv_decrement,
1493   lv_addressof,
1494   lv_asm
1495 };
1496
1497 extern void lvalue_error (location_t, enum lvalue_use);
1498 extern void invalid_indirection_error (location_t, tree, ref_operator);
1499 extern void readonly_error (location_t, tree, enum lvalue_use);
1500 extern void warn_array_subscript_with_type_char (location_t, tree);
1501 extern void warn_about_parentheses (location_t,
1502                                     enum tree_code,
1503                                     enum tree_code, tree,
1504                                     enum tree_code, tree);
1505 extern void warn_for_unused_label (tree label);
1506 extern void warn_for_div_by_zero (location_t, tree divisor);
1507 extern void warn_for_memset (location_t, tree, tree, int);
1508 extern void warn_for_sign_compare (location_t,
1509                                    tree orig_op0, tree orig_op1,
1510                                    tree op0, tree op1,
1511                                    tree result_type,
1512                                    enum tree_code resultcode);
1513 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1514                                       location_t);
1515 extern void do_warn_unused_parameter (tree);
1516 extern void record_locally_defined_typedef (tree);
1517 extern void maybe_record_typedef_use (tree);
1518 extern void maybe_warn_unused_local_typedefs (void);
1519 extern void maybe_warn_bool_compare (location_t, enum tree_code, tree, tree);
1520 extern bool maybe_warn_shift_overflow (location_t, tree, tree);
1521 extern void warn_duplicated_cond_add_or_warn (location_t, tree, vec<tree> **);
1522 extern bool diagnose_mismatched_attributes (tree, tree);
1523 extern tree do_warn_duplicated_branches_r (tree *, int *, void *);
1524 extern void warn_for_multistatement_macros (location_t, location_t,
1525                                             location_t, enum rid);
1526
1527 /* In c-attribs.c.  */
1528 extern bool attribute_takes_identifier_p (const_tree);
1529 extern tree handle_unused_attribute (tree *, tree, tree, int, bool *);
1530 extern int parse_tm_stmt_attr (tree, int);
1531 extern int tm_attr_to_mask (tree);
1532 extern tree tm_mask_to_attr (int);
1533 extern tree find_tm_attribute (tree);
1534
1535 extern enum flt_eval_method
1536 excess_precision_mode_join (enum flt_eval_method, enum flt_eval_method);
1537
1538 extern int c_flt_eval_method (bool ts18661_p);
1539 extern void add_no_sanitize_value (tree node, unsigned int flags);
1540
1541 extern void maybe_add_include_fixit (rich_location *, const char *);
1542 extern void maybe_suggest_missing_token_insertion (rich_location *richloc,
1543                                                    enum cpp_ttype token_type,
1544                                                    location_t prev_token_loc);
1545
1546 #if CHECKING_P
1547 namespace selftest {
1548   /* Declarations for specific families of tests within c-family,
1549      by source file, in alphabetical order.  */
1550   extern void c_format_c_tests (void);
1551
1552   /* The entrypoint for running all of the above tests.  */
1553   extern void c_family_tests (void);
1554 } // namespace selftest
1555 #endif /* #if CHECKING_P */
1556
1557 #endif /* ! GCC_C_COMMON_H */