gcc/c-family/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987-2016 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_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
 105
 106   /* TS 18661-3 keywords, in the same sequence as the TI_* values.  */
 107   RID_FLOAT16,
 108   RID_FLOATN_NX_FIRST = RID_FLOAT16,
 109   RID_FLOAT32,
 110   RID_FLOAT64,
 111   RID_FLOAT128,
 112   RID_FLOAT32X,
 113   RID_FLOAT64X,
 114   RID_FLOAT128X,
 115 #define CASE_RID_FLOATN_NX                                              \
 116   case RID_FLOAT16: case RID_FLOAT32: case RID_FLOAT64: case RID_FLOAT128: \
 117   case RID_FLOAT32X: case RID_FLOAT64X: case RID_FLOAT128X
 118
 119   RID_FRACT, RID_ACCUM, RID_AUTO_TYPE, RID_BUILTIN_CALL_WITH_STATIC_CHAIN,
 120
 121   /* C11 */
 122   RID_ALIGNAS, RID_GENERIC,
 123
 124   /* This means to warn that this is a C++ keyword, and then treat it
 125      as a normal identifier.  */
 126   RID_CXX_COMPAT_WARN,
 127
 128   /* GNU transactional memory extension */
 129   RID_TRANSACTION_ATOMIC, RID_TRANSACTION_RELAXED, RID_TRANSACTION_CANCEL,
 130
 131   /* Too many ways of getting the name of a function as a string */
 132   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
 133
 134   /* C++ (some of these are keywords in Objective-C as well, but only
 135      if they appear after a '@') */
 136   RID_BOOL,     RID_WCHAR,    RID_CLASS,
 137   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
 138   RID_TEMPLATE, RID_NULL,     RID_CATCH,
 139   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
 140   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
 141   RID_THIS,     RID_THROW,    RID_TRUE,
 142   RID_TRY,      RID_TYPENAME, RID_TYPEID,
 143   RID_USING,    RID_CHAR16,   RID_CHAR32,
 144
 145   /* casts */
 146   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 147
 148   /* C++ extensions */
 149   RID_ADDRESSOF,               RID_BASES,
 150   RID_BUILTIN_LAUNDER,         RID_DIRECT_BASES,
 151   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 152   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 153   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 154   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_UNIQUE_OBJ_REPRESENTATIONS,
 155   RID_HAS_VIRTUAL_DESTRUCTOR,
 156   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 157   RID_IS_CLASS,
 158   RID_IS_EMPTY,                RID_IS_ENUM,
 159   RID_IS_FINAL,                RID_IS_LITERAL_TYPE,
 160   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 161   RID_IS_SAME_AS,
 162   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 163   RID_IS_TRIVIALLY_ASSIGNABLE, RID_IS_TRIVIALLY_CONSTRUCTIBLE,
 164   RID_IS_TRIVIALLY_COPYABLE,
 165   RID_IS_UNION,                RID_UNDERLYING_TYPE,
 166
 167   /* C++11 */
 168   RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
 169
 170   /* C++ concepts */
 171   RID_CONCEPT, RID_REQUIRES,
 172
 173   /* C++ transactional memory.  */
 174   RID_ATOMIC_NOEXCEPT, RID_ATOMIC_CANCEL, RID_SYNCHRONIZED,
 175
 176   /* Cilk Plus keywords.  */
 177   RID_CILK_SPAWN, RID_CILK_SYNC, RID_CILK_FOR,
 178
 179   /* Objective-C ("AT" reserved words - they are only keywords when
 180      they follow '@')  */
 181   RID_AT_ENCODE,   RID_AT_END,
 182   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 183   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,  RID_AT_PACKAGE,
 184   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 185   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 186   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 187   RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
 188   RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
 189   RID_AT_INTERFACE,
 190   RID_AT_IMPLEMENTATION,
 191
 192   /* Named address support, mapping the keyword to a particular named address
 193      number.  Named address space 0 is reserved for the generic address.  If
 194      there are more than 254 named addresses, the addr_space_t type will need
 195      to be grown from an unsigned char to unsigned short.  */
 196   RID_ADDR_SPACE_0,             /* generic address */
 197   RID_ADDR_SPACE_1,
 198   RID_ADDR_SPACE_2,
 199   RID_ADDR_SPACE_3,
 200   RID_ADDR_SPACE_4,
 201   RID_ADDR_SPACE_5,
 202   RID_ADDR_SPACE_6,
 203   RID_ADDR_SPACE_7,
 204   RID_ADDR_SPACE_8,
 205   RID_ADDR_SPACE_9,
 206   RID_ADDR_SPACE_10,
 207   RID_ADDR_SPACE_11,
 208   RID_ADDR_SPACE_12,
 209   RID_ADDR_SPACE_13,
 210   RID_ADDR_SPACE_14,
 211   RID_ADDR_SPACE_15,
 212
 213   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 214   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 215
 216   /* __intN keywords.  The _N_M here doesn't correspond to the intN
 217      in the keyword; use the bitsize in int_n_t_data_t[M] for that.
 218      For example, if int_n_t_data_t[0].bitsize is 13, then RID_INT_N_0
 219      is for __int13.  */
 220
 221   /* Note that the range to use is RID_FIRST_INT_N through
 222      RID_FIRST_INT_N + NUM_INT_N_ENTS - 1 and c-parser.c has a list of
 223      all RID_INT_N_* in a case statement.  */
 224
 225   RID_INT_N_0,
 226   RID_INT_N_1,
 227   RID_INT_N_2,
 228   RID_INT_N_3,
 229
 230   RID_FIRST_INT_N = RID_INT_N_0,
 231   RID_LAST_INT_N = RID_INT_N_3,
 232
 233   RID_MAX,
 234
 235   RID_FIRST_MODIFIER = RID_STATIC,
 236   RID_LAST_MODIFIER = RID_ONEWAY,
 237
 238   RID_FIRST_CXX11 = RID_CONSTEXPR,
 239   RID_LAST_CXX11 = RID_STATIC_ASSERT,
 240   RID_FIRST_AT = RID_AT_ENCODE,
 241   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 242   RID_FIRST_PQ = RID_IN,
 243   RID_LAST_PQ = RID_ONEWAY,
 244   RID_FIRST_PATTR = RID_GETTER,
 245   RID_LAST_PATTR = RID_NONATOMIC
 246 };
 247
 248 #define OBJC_IS_AT_KEYWORD(rid) \
 249   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 250    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 251
 252 #define OBJC_IS_PQ_KEYWORD(rid) \
 253   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 254    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 255
 256 #define OBJC_IS_PATTR_KEYWORD(rid) \
 257   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
 258    (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
 259
 260 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
 261    'class') which are shared in a subtle way between Objective-C and
 262    C++.  When the lexer is lexing in Objective-C/Objective-C++, if it
 263    finds '@' followed by one of these identifiers (eg, '@class'), it
 264    recognizes the whole as an Objective-C keyword.  If the identifier
 265    is found elsewhere, it follows the rules of the C/C++ language.
 266  */
 267 #define OBJC_IS_CXX_KEYWORD(rid) \
 268   (rid == RID_CLASS || rid == RID_SYNCHRONIZED                  \
 269    || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE   \
 270    || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
 271
 272 /* The elements of `ridpointers' are identifier nodes for the reserved
 273    type names and storage classes.  It is indexed by a RID_... value.  */
 274 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 275
 276 /* Standard named or nameless data types of the C compiler.  */
 277
 278 enum c_tree_index
 279 {
 280     CTI_CHAR16_TYPE,
 281     CTI_CHAR32_TYPE,
 282     CTI_WCHAR_TYPE,
 283     CTI_UNDERLYING_WCHAR_TYPE,
 284     CTI_WINT_TYPE,
 285     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 286     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 287     CTI_INTMAX_TYPE,
 288     CTI_UINTMAX_TYPE,
 289     CTI_WIDEST_INT_LIT_TYPE,
 290     CTI_WIDEST_UINT_LIT_TYPE,
 291
 292     /* Types for <stdint.h>, that may not be defined on all
 293        targets.  */
 294     CTI_SIG_ATOMIC_TYPE,
 295     CTI_INT8_TYPE,
 296     CTI_INT16_TYPE,
 297     CTI_INT32_TYPE,
 298     CTI_INT64_TYPE,
 299     CTI_UINT8_TYPE,
 300     CTI_UINT16_TYPE,
 301     CTI_UINT32_TYPE,
 302     CTI_UINT64_TYPE,
 303     CTI_INT_LEAST8_TYPE,
 304     CTI_INT_LEAST16_TYPE,
 305     CTI_INT_LEAST32_TYPE,
 306     CTI_INT_LEAST64_TYPE,
 307     CTI_UINT_LEAST8_TYPE,
 308     CTI_UINT_LEAST16_TYPE,
 309     CTI_UINT_LEAST32_TYPE,
 310     CTI_UINT_LEAST64_TYPE,
 311     CTI_INT_FAST8_TYPE,
 312     CTI_INT_FAST16_TYPE,
 313     CTI_INT_FAST32_TYPE,
 314     CTI_INT_FAST64_TYPE,
 315     CTI_UINT_FAST8_TYPE,
 316     CTI_UINT_FAST16_TYPE,
 317     CTI_UINT_FAST32_TYPE,
 318     CTI_UINT_FAST64_TYPE,
 319     CTI_INTPTR_TYPE,
 320     CTI_UINTPTR_TYPE,
 321
 322     CTI_CHAR_ARRAY_TYPE,
 323     CTI_CHAR16_ARRAY_TYPE,
 324     CTI_CHAR32_ARRAY_TYPE,
 325     CTI_WCHAR_ARRAY_TYPE,
 326     CTI_STRING_TYPE,
 327     CTI_CONST_STRING_TYPE,
 328
 329     /* Type for boolean expressions (bool in C++, int in C).  */
 330     CTI_TRUTHVALUE_TYPE,
 331     CTI_TRUTHVALUE_TRUE,
 332     CTI_TRUTHVALUE_FALSE,
 333
 334     CTI_DEFAULT_FUNCTION_TYPE,
 335
 336     /* These are not types, but we have to look them up all the time.  */
 337     CTI_FUNCTION_NAME_DECL,
 338     CTI_PRETTY_FUNCTION_NAME_DECL,
 339     CTI_C99_FUNCTION_NAME_DECL,
 340     CTI_SAVED_FUNCTION_NAME_DECLS,
 341
 342     CTI_NULL,
 343
 344     CTI_MAX
 345 };
 346
 347 #define C_CPP_HASHNODE(id) \
 348   (&(((struct c_common_identifier *) (id))->node))
 349 #define C_RID_CODE(id) \
 350   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 351 #define C_SET_RID_CODE(id, code) \
 352   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 353
 354 /* Identifier part common to the C front ends.  Inherits from
 355    tree_identifier, despite appearances.  */
 356 struct GTY(()) c_common_identifier {
 357   struct tree_common common;
 358   struct cpp_hashnode node;
 359 };
 360
 361 /* An entry in the reserved keyword table.  */
 362
 363 struct c_common_resword
 364 {
 365   const char *const word;
 366   ENUM_BITFIELD(rid) const rid : 16;
 367   const unsigned int disable   : 16;
 368 };
 369
 370 /* Mode used to build pointers (VOIDmode means ptr_mode).  */
 371
 372 extern machine_mode c_default_pointer_mode;
 373
 374 /* Extra cpp_ttype values for C++.  */
 375
 376 /* A token type for template-ids.  If a template-id is processed while
 377    parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
 378    the value of the CPP_TEMPLATE_ID is whatever was returned by
 379    cp_parser_template_id.  */
 380 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
 381
 382 /* A token type for nested-name-specifiers.  If a
 383    nested-name-specifier is processed while parsing tentatively, it is
 384    replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
 385    CPP_NESTED_NAME_SPECIFIER is whatever was returned by
 386    cp_parser_nested_name_specifier_opt.  */
 387 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
 388
 389 /* A token type for pre-parsed C++0x decltype.  */
 390 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
 391
 392 /* A token type for pre-parsed primary-expression (lambda- or statement-).  */
 393 #define CPP_PREPARSED_EXPR ((enum cpp_ttype) (CPP_DECLTYPE + 1))
 394
 395 /* The number of token types, including C++-specific ones.  */
 396 #define N_CP_TTYPES ((int) (CPP_PREPARSED_EXPR + 1))
 397
 398 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 399    mask) is _true_.  Thus for keywords which are present in all
 400    languages the disable field is zero.  */
 401
 402 #define D_CONLY         0x001   /* C only (not in C++).  */
 403 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 404 #define D_C99           0x004   /* In C, C99 only.  */
 405 #define D_CXX11         0x008   /* In C++, C++11 only.  */
 406 #define D_EXT           0x010   /* GCC extension.  */
 407 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 408 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 409 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 410 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 411 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 412 #define D_CXX_CONCEPTS  0x400   /* In C++, only with concepts. */
 413 #define D_TRANSMEM      0X800   /* C++ transactional memory TS.  */
 414
 415 #define D_CXX_CONCEPTS_FLAGS D_CXXONLY | D_CXX_CONCEPTS
 416
 417 /* The reserved keyword table.  */
 418 extern const struct c_common_resword c_common_reswords[];
 419
 420 /* The number of items in the reserved keyword table.  */
 421 extern const unsigned int num_c_common_reswords;
 422
 423 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 424 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 425 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 426 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 427 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 428 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 429 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 430 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 431 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 432 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 433 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 434
 435 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 436 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 437 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 438 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 439 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 440 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 441 #define c_uint16_type_node              c_global_trees[CTI_UINT16_TYPE]
 442 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 443 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 444 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 445 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 446 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 447 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 448 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 449 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 450 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 451 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 452 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 453 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 454 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 455 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 456 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 457 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 458 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 459 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 460 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 461 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 462
 463 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 464 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 465 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 466
 467 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 468 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 469 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 470 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 471 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 472 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 473
 474 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 475
 476 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 477 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 478 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 479 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 480
 481 /* The node for C++ `__null'.  */
 482 #define null_node                       c_global_trees[CTI_NULL]
 483
 484 extern GTY(()) tree c_global_trees[CTI_MAX];
 485
 486 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 487    tree for size reasons.  */
 488 struct GTY(()) sorted_fields_type {
 489   int len;
 490   tree GTY((length ("%h.len"))) elts[1];
 491 };
 492
 493 /* Mark which labels are explicitly declared.
 494    These may be shadowed, and may be referenced from nested functions.  */
 495 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 496
 497 enum c_language_kind
 498 {
 499   clk_c         = 0,            /* C90, C94, C99 or C11 */
 500   clk_objc      = 1,            /* clk_c with ObjC features.  */
 501   clk_cxx       = 2,            /* ANSI/ISO C++ */
 502   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 503 };
 504
 505 /* To test for a specific language use c_language, defined by each
 506    front end.  For "ObjC features" or "not C++" use the macros.  */
 507 extern c_language_kind c_language;
 508
 509 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 510 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 511
 512 /* The various name of operator that appears in error messages. */
 513 enum ref_operator {
 514   /* NULL */
 515   RO_NULL,
 516   /* array indexing */
 517   RO_ARRAY_INDEXING,
 518   /* unary * */
 519   RO_UNARY_STAR,
 520   /* -> */
 521   RO_ARROW,
 522   /* implicit conversion */
 523   RO_IMPLICIT_CONVERSION,
 524   /* ->* */
 525   RO_ARROW_STAR
 526 };
 527
 528 /* Information about a statement tree.  */
 529
 530 struct GTY(()) stmt_tree_s {
 531   /* A stack of statement lists being collected.  */
 532   vec<tree, va_gc> *x_cur_stmt_list;
 533
 534   /* In C++, Nonzero if we should treat statements as full
 535      expressions.  In particular, this variable is non-zero if at the
 536      end of a statement we should destroy any temporaries created
 537      during that statement.  Similarly, if, at the end of a block, we
 538      should destroy any local variables in this block.  Normally, this
 539      variable is nonzero, since those are the normal semantics of
 540      C++.
 541
 542      This flag has no effect in C.  */
 543   int stmts_are_full_exprs_p;
 544 };
 545
 546 typedef struct stmt_tree_s *stmt_tree;
 547
 548 /* Global state pertinent to the current function.  Some C dialects
 549    extend this structure with additional fields.  */
 550
 551 struct GTY(()) c_language_function {
 552   /* While we are parsing the function, this contains information
 553      about the statement-tree that we are building.  */
 554   struct stmt_tree_s x_stmt_tree;
 555
 556   /* Vector of locally defined typedefs, for
 557      -Wunused-local-typedefs.  */
 558   vec<tree, va_gc> *local_typedefs;
 559 };
 560
 561 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
 562
 563 /* When building a statement-tree, this is the current statement list
 564    being collected.  */
 565 #define cur_stmt_list   (stmt_list_stack->last ())
 566
 567 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
 568
 569 /* Language-specific hooks.  */
 570
 571 /* If non-NULL, this function is called after a precompile header file
 572    is loaded.  */
 573 extern void (*lang_post_pch_load) (void);
 574
 575 extern void push_file_scope (void);
 576 extern void pop_file_scope (void);
 577 extern stmt_tree current_stmt_tree (void);
 578 extern tree push_stmt_list (void);
 579 extern tree pop_stmt_list (tree);
 580 extern tree add_stmt (tree);
 581 extern void push_cleanup (tree, tree, bool);
 582 extern tree pushdecl_top_level (tree);
 583 extern tree pushdecl (tree);
 584 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 585                                location_t, tree, tree);
 586 extern tree build_array_notation_expr (location_t, tree, tree, enum tree_code,
 587                                        location_t, tree, tree);
 588 extern tree build_array_notation_ref (location_t, tree, tree, tree, tree, tree);
 589 extern tree build_indirect_ref (location_t, tree, ref_operator);
 590
 591 extern int field_decl_cmp (const void *, const void *);
 592 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 593                                   void *);
 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++1z (C++17?) */
 707   cxx1z
 708 };
 709
 710 /* The C++ dialect being used. C++98 is the default.  */
 711 extern enum cxx_dialect cxx_dialect;
 712
 713 /* Maximum template instantiation depth.  This limit is rather
 714    arbitrary, but it exists to limit the time it takes to notice
 715    excessively recursive template instantiations.  */
 716
 717 extern int max_tinst_depth;
 718
 719 /* Nonzero means that we should not issue warnings about problems that
 720    occur when the code is executed, because the code being processed
 721    is not expected to be executed.  This is set during parsing.  This
 722    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 723    not a bool, because unexecuted expressions can nest.  */
 724
 725 extern int c_inhibit_evaluation_warnings;
 726
 727 /* Whether lexing has been completed, so subsequent preprocessor
 728    errors should use the compiler's input_location.  */
 729
 730 extern bool done_lexing;
 731
 732 /* C types are partitioned into three subsets: object, function, and
 733    incomplete types.  */
 734 #define C_TYPE_OBJECT_P(type) \
 735   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 736
 737 #define C_TYPE_INCOMPLETE_P(type) \
 738   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 739
 740 #define C_TYPE_FUNCTION_P(type) \
 741   (TREE_CODE (type) == FUNCTION_TYPE)
 742
 743 /* For convenience we define a single macro to identify the class of
 744    object or incomplete types.  */
 745 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 746   (!C_TYPE_FUNCTION_P (type))
 747
 748 struct visibility_flags
 749 {
 750   unsigned inpragma : 1;        /* True when in #pragma GCC visibility.  */
 751   unsigned inlines_hidden : 1;  /* True when -finlineshidden in effect.  */
 752 };
 753
 754 /* These enumerators are possible types of unsafe conversions.  */
 755 enum conversion_safety {
 756   /* The conversion is safe.  */
 757   SAFE_CONVERSION = 0,
 758   /* Another type of conversion with problems.  */
 759   UNSAFE_OTHER,
 760   /* Conversion between signed and unsigned integers
 761      which are all warned about immediately, so this is unused.  */
 762   UNSAFE_SIGN,
 763   /* Conversions that reduce the precision of reals including conversions
 764      from reals to integers.  */
 765   UNSAFE_REAL,
 766   /* Conversions from complex to reals or integers, that discard imaginary
 767      component.  */
 768   UNSAFE_IMAGINARY
 769 };
 770
 771 /* Global visibility options.  */
 772 extern struct visibility_flags visibility_options;
 773
 774 /* Attribute table common to the C front ends.  */
 775 extern const struct attribute_spec c_common_attribute_table[];
 776 extern const struct attribute_spec c_common_format_attribute_table[];
 777
 778 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 779    ID is the identifier to use, NAME is the string.
 780    TYPE_DEP indicates whether it depends on type of the function or not
 781    (i.e. __PRETTY_FUNCTION__).  */
 782
 783 extern tree (*make_fname_decl) (location_t, tree, int);
 784
 785 /* In c-decl.c and cp/tree.c.  FIXME.  */
 786 extern void c_register_addr_space (const char *str, addr_space_t as);
 787
 788 /* In c-common.c.  */
 789 extern bool in_late_binary_op;
 790 extern const char *c_addr_space_name (addr_space_t as);
 791 extern tree identifier_global_value (tree);
 792 extern tree c_linkage_bindings (tree);
 793 extern void record_builtin_type (enum rid, const char *, tree);
 794 extern tree build_void_list_node (void);
 795 extern void start_fname_decls (void);
 796 extern void finish_fname_decls (void);
 797 extern const char *fname_as_string (int);
 798 extern tree fname_decl (location_t, unsigned, tree);
 799
 800 extern int check_user_alignment (const_tree, bool);
 801 extern void check_function_arguments (location_t loc, const_tree, int, tree *);
 802 extern void check_function_arguments_recurse (void (*)
 803                                               (void *, tree,
 804                                                unsigned HOST_WIDE_INT),
 805                                               void *, tree,
 806                                               unsigned HOST_WIDE_INT);
 807 extern bool check_builtin_function_arguments (location_t, vec<location_t>,
 808                                               tree, int, tree *);
 809 extern void check_function_format (tree, int, tree *);
 810 extern bool attribute_fallthrough_p (tree);
 811 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 812 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 813 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
 814                                     const struct cl_option_handlers *);
 815 extern bool default_handle_c_option (size_t, const char *, int);
 816 extern tree c_common_type_for_mode (machine_mode, int);
 817 extern tree c_common_type_for_size (unsigned int, int);
 818 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 819                                                 int, int);
 820 extern tree c_common_unsigned_type (tree);
 821 extern tree c_common_signed_type (tree);
 822 extern tree c_common_signed_or_unsigned_type (int, tree);
 823 extern void c_common_init_ts (void);
 824 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 825 extern enum conversion_safety unsafe_conversion_p (location_t, tree, tree,
 826                                                    bool);
 827 extern bool decl_with_nonnull_addr_p (const_tree);
 828 extern tree c_fully_fold (tree, bool, bool *);
 829 extern tree c_wrap_maybe_const (tree, bool);
 830 extern tree c_save_expr (tree);
 831 extern tree c_common_truthvalue_conversion (location_t, tree);
 832 extern void c_apply_type_quals_to_decl (int, tree);
 833 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, bool, int);
 834 extern tree c_alignof_expr (location_t, tree);
 835 /* Print an error message for invalid operands to arith operation CODE.
 836    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 837 extern void binary_op_error (rich_location *, enum tree_code, tree, tree);
 838 extern tree fix_string_type (tree);
 839 extern tree convert_and_check (location_t, tree, tree);
 840 extern bool c_determine_visibility (tree);
 841 extern bool vector_types_compatible_elements_p (tree, tree);
 842 extern void mark_valid_location_for_stdc_pragma (bool);
 843 extern bool valid_location_for_stdc_pragma_p (void);
 844 extern void set_float_const_decimal64 (void);
 845 extern void clear_float_const_decimal64 (void);
 846 extern bool float_const_decimal64_p (void);
 847
 848 extern bool keyword_begins_type_specifier (enum rid);
 849 extern bool keyword_is_storage_class_specifier (enum rid);
 850 extern bool keyword_is_type_qualifier (enum rid);
 851 extern bool keyword_is_decl_specifier (enum rid);
 852 extern unsigned max_align_t_align (void);
 853 extern bool cxx_fundamental_alignment_p (unsigned);
 854 extern bool pointer_to_zero_sized_aggr_p (tree);
 855 extern bool bool_promoted_to_int_p (tree);
 856 extern tree fold_for_warn (tree);
 857 extern tree c_common_get_narrower (tree, int *);
 858 extern bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *);
 859
 860 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, false, 1)
 861 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, false, 1)
 862
 863 /* Subroutine of build_binary_op, used for certain operations.  */
 864 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 865
 866 /* Subroutine of build_binary_op, used for comparison operations.
 867    See if the operands have both been converted from subword integer types
 868    and, if so, perhaps change them both back to their original type.  */
 869 extern tree shorten_compare (location_t, tree *, tree *, tree *,
 870                              enum tree_code *);
 871
 872 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree,
 873                              bool = true);
 874
 875 /* Add qualifiers to a type, in the fashion for C.  */
 876 extern tree c_build_qualified_type (tree, int, tree = NULL_TREE, size_t = 0);
 877
 878 /* Build tree nodes and builtin functions common to both C and C++ language
 879    frontends.  */
 880 extern void c_common_nodes_and_builtins (void);
 881
 882 extern void disable_builtin_function (const char *);
 883
 884 extern void set_compound_literal_name (tree decl);
 885
 886 extern tree build_va_arg (location_t, tree, tree);
 887
 888 extern const unsigned int c_family_lang_mask;
 889 extern unsigned int c_common_option_lang_mask (void);
 890 extern void c_common_diagnostics_set_defaults (diagnostic_context *);
 891 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
 892 extern void c_common_init_options_struct (struct gcc_options *);
 893 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
 894 extern bool c_common_post_options (const char **);
 895 extern bool c_common_init (void);
 896 extern void c_common_finish (void);
 897 extern void c_common_parse_file (void);
 898 extern FILE *get_dump_info (int, int *);
 899 extern alias_set_type c_common_get_alias_set (tree);
 900 extern void c_register_builtin_type (tree, const char*);
 901 extern bool c_promoting_integer_type_p (const_tree);
 902 extern int self_promoting_args_p (const_tree);
 903 extern tree strip_pointer_operator (tree);
 904 extern tree strip_pointer_or_array_types (tree);
 905 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 906
 907 /* This is the basic parsing function.  */
 908 extern void c_parse_file (void);
 909
 910 extern void c_parse_final_cleanups (void);
 911
 912 /* These macros provide convenient access to the various _STMT nodes.  */
 913
 914 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 915    if a statement expression.  */
 916 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 917   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 918
 919 /* Nonzero if a label has been added to the statement list.  */
 920 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 921   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 922
 923 /* C_MAYBE_CONST_EXPR accessors.  */
 924 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 925   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 926 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 927   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 928 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 929   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 930 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 931   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 932 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 933   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 934    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 935        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 936            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 937
 938 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 939 #define DECL_C_BIT_FIELD(NODE) \
 940   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 941 #define SET_DECL_C_BIT_FIELD(NODE) \
 942   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 943 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 944   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 945
 946 extern tree do_case (location_t, tree, tree);
 947 extern tree build_stmt (location_t, enum tree_code, ...);
 948 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
 949
 950 /* These functions must be defined by each front-end which implements
 951    a variant of the C language.  They are used in c-common.c.  */
 952
 953 extern tree build_unary_op (location_t, enum tree_code, tree, bool);
 954 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 955 extern tree perform_integral_promotions (tree);
 956
 957 /* These functions must be defined by each front-end which implements
 958    a variant of the C language.  They are used by port files.  */
 959
 960 extern tree default_conversion (tree);
 961
 962 /* Given two integer or real types, return the type for their sum.
 963    Given two compatible ANSI C types, returns the merged type.  */
 964
 965 extern tree common_type (tree, tree);
 966
 967 extern tree decl_constant_value (tree);
 968
 969 /* Handle increment and decrement of boolean types.  */
 970 extern tree boolean_increment (enum tree_code, tree);
 971
 972 extern int case_compare (splay_tree_key, splay_tree_key);
 973
 974 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree,
 975                               bool *);
 976
 977 extern tree build_function_call (location_t, tree, tree);
 978
 979 extern tree build_function_call_vec (location_t, vec<location_t>, tree,
 980                                      vec<tree, va_gc> *, vec<tree, va_gc> *);
 981
 982 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
 983
 984 extern tree finish_label_address_expr (tree, location_t);
 985
 986 /* Same function prototype, but the C and C++ front ends have
 987    different implementations.  Used in c-common.c.  */
 988 extern tree lookup_label (tree);
 989 extern tree lookup_name (tree);
 990 extern bool lvalue_p (const_tree);
 991
 992 enum lookup_name_fuzzy_kind {
 993   /* Names of types.  */
 994   FUZZY_LOOKUP_TYPENAME,
 995
 996   /* Names of function decls.  */
 997   FUZZY_LOOKUP_FUNCTION_NAME,
 998
 999   /* Any name.  */
1000   FUZZY_LOOKUP_NAME
1001 };
1002 extern const char *lookup_name_fuzzy (tree, enum lookup_name_fuzzy_kind);
1003
1004 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
1005 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
1006 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true);
1007
1008 extern void init_c_lex (void);
1009
1010 extern void c_cpp_builtins (cpp_reader *);
1011 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
1012 extern bool c_cpp_error (cpp_reader *, int, int, rich_location *,
1013                          const char *, va_list *)
1014      ATTRIBUTE_GCC_DIAG(5,0);
1015 extern int c_common_has_attribute (cpp_reader *);
1016
1017 extern bool parse_optimize_options (tree, bool);
1018
1019 /* Positive if an implicit `extern "C"' scope has just been entered;
1020    negative if such a scope has just been exited.  */
1021 extern GTY(()) int pending_lang_change;
1022
1023 /* Information recorded about each file examined during compilation.  */
1024
1025 struct c_fileinfo
1026 {
1027   int time;     /* Time spent in the file.  */
1028
1029   /* Flags used only by C++.
1030      INTERFACE_ONLY nonzero means that we are in an "interface" section
1031      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
1032      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
1033      INTERFACE_ONLY is zero, it means that we are responsible for
1034      exporting definitions that others might need.  */
1035   short interface_only;
1036   short interface_unknown;
1037 };
1038
1039 struct c_fileinfo *get_fileinfo (const char *);
1040 extern void dump_time_statistics (void);
1041
1042 extern bool c_dump_tree (void *, tree);
1043
1044 extern void verify_sequence_points (tree);
1045
1046 extern tree fold_offsetof_1 (tree, tree_code ctx = ERROR_MARK);
1047 extern tree fold_offsetof (tree);
1048
1049 extern int complete_array_type (tree *, tree, bool);
1050
1051 extern tree builtin_type_for_size (int, bool);
1052
1053 extern void c_common_mark_addressable_vec (tree);
1054
1055 extern void set_underlying_type (tree);
1056 extern void record_types_used_by_current_var_decl (tree);
1057 extern vec<tree, va_gc> *make_tree_vector (void);
1058 extern void release_tree_vector (vec<tree, va_gc> *);
1059 extern vec<tree, va_gc> *make_tree_vector_single (tree);
1060 extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1061 extern vec<tree, va_gc> *make_tree_vector_from_ctor (tree);
1062 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1063
1064 /* Used for communication between c_common_type_for_mode and
1065    c_register_builtin_type.  */
1066 extern GTY(()) tree registered_builtin_types;
1067
1068 /* Read SOURCE_DATE_EPOCH from environment to have a deterministic
1069    timestamp to replace embedded current dates to get reproducible
1070    results.  Returns -1 if SOURCE_DATE_EPOCH is not defined.  */
1071 extern time_t cb_get_source_date_epoch (cpp_reader *pfile);
1072
1073 /* The value (as a unix timestamp) corresponds to date
1074    "Dec 31 9999 23:59:59 UTC", which is the latest date that __DATE__ and
1075    __TIME__ can store.  */
1076 #define MAX_SOURCE_DATE_EPOCH HOST_WIDE_INT_C (253402300799)
1077
1078 /* Callback for libcpp for offering spelling suggestions for misspelled
1079    directives.  */
1080 extern const char *cb_get_suggestion (cpp_reader *, const char *,
1081                                       const char *const *);
1082
1083 extern GTY(()) string_concat_db *g_string_concat_db;
1084
1085 class substring_loc;
1086 extern const char *c_get_substring_location (const substring_loc &substr_loc,
1087                                              location_t *out_loc);
1088
1089 /* In c-gimplify.c  */
1090 extern void c_genericize (tree);
1091 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1092 extern tree c_build_bind_expr (location_t, tree, tree);
1093
1094 /* In c-lex.c.  */
1095 extern enum cpp_ttype
1096 conflict_marker_get_final_tok_kind (enum cpp_ttype tok1_kind);
1097
1098 /* In c-pch.c  */
1099 extern void pch_init (void);
1100 extern void pch_cpp_save_state (void);
1101 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1102 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1103                                const char *orig);
1104 extern void c_common_write_pch (void);
1105 extern void c_common_no_more_pch (void);
1106 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1107
1108 /* In *-checksum.c */
1109 extern const unsigned char executable_checksum[16];
1110
1111 /* In c-cppbuiltin.c  */
1112 extern void builtin_define_std (const char *macro);
1113 extern void builtin_define_with_value (const char *, const char *, int);
1114 extern void builtin_define_with_int_value (const char *, HOST_WIDE_INT);
1115 extern void builtin_define_type_sizeof (const char *, tree);
1116 extern void c_stddef_cpp_builtins (void);
1117 extern void fe_file_change (const line_map_ordinary *);
1118 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1119
1120 /* In c-ppoutput.c  */
1121 extern void init_pp_output (FILE *);
1122 extern void preprocess_file (cpp_reader *);
1123 extern void pp_file_change (const line_map_ordinary *);
1124 extern void pp_dir_change (cpp_reader *, const char *);
1125 extern bool check_missing_format_attribute (tree, tree);
1126
1127 /* In c-omp.c  */
1128 struct omp_clause_mask
1129 {
1130   inline omp_clause_mask ();
1131   inline omp_clause_mask (uint64_t l);
1132   inline omp_clause_mask (uint64_t l, uint64_t h);
1133   inline omp_clause_mask &operator &= (omp_clause_mask);
1134   inline omp_clause_mask &operator |= (omp_clause_mask);
1135   inline omp_clause_mask operator ~ () const;
1136   inline omp_clause_mask operator & (omp_clause_mask) const;
1137   inline omp_clause_mask operator | (omp_clause_mask) const;
1138   inline omp_clause_mask operator >> (int);
1139   inline omp_clause_mask operator << (int);
1140   inline bool operator == (omp_clause_mask) const;
1141   inline bool operator != (omp_clause_mask) const;
1142   uint64_t low, high;
1143 };
1144
1145 inline
1146 omp_clause_mask::omp_clause_mask ()
1147 {
1148 }
1149
1150 inline
1151 omp_clause_mask::omp_clause_mask (uint64_t l)
1152 : low (l), high (0)
1153 {
1154 }
1155
1156 inline
1157 omp_clause_mask::omp_clause_mask (uint64_t l, uint64_t h)
1158 : low (l), high (h)
1159 {
1160 }
1161
1162 inline omp_clause_mask &
1163 omp_clause_mask::operator &= (omp_clause_mask b)
1164 {
1165   low &= b.low;
1166   high &= b.high;
1167   return *this;
1168 }
1169
1170 inline omp_clause_mask &
1171 omp_clause_mask::operator |= (omp_clause_mask b)
1172 {
1173   low |= b.low;
1174   high |= b.high;
1175   return *this;
1176 }
1177
1178 inline omp_clause_mask
1179 omp_clause_mask::operator ~ () const
1180 {
1181   omp_clause_mask ret (~low, ~high);
1182   return ret;
1183 }
1184
1185 inline omp_clause_mask
1186 omp_clause_mask::operator | (omp_clause_mask b) const
1187 {
1188   omp_clause_mask ret (low | b.low, high | b.high);
1189   return ret;
1190 }
1191
1192 inline omp_clause_mask
1193 omp_clause_mask::operator & (omp_clause_mask b) const
1194 {
1195   omp_clause_mask ret (low & b.low, high & b.high);
1196   return ret;
1197 }
1198
1199 inline omp_clause_mask
1200 omp_clause_mask::operator << (int amount)
1201 {
1202   omp_clause_mask ret;
1203   if (amount >= 64)
1204     {
1205       ret.low = 0;
1206       ret.high = low << (amount - 64);
1207     }
1208   else if (amount == 0)
1209     ret = *this;
1210   else
1211     {
1212       ret.low = low << amount;
1213       ret.high = (low >> (64 - amount)) | (high << amount);
1214     }
1215   return ret;
1216 }
1217
1218 inline omp_clause_mask
1219 omp_clause_mask::operator >> (int amount)
1220 {
1221   omp_clause_mask ret;
1222   if (amount >= 64)
1223     {
1224       ret.low = high >> (amount - 64);
1225       ret.high = 0;
1226     }
1227   else if (amount == 0)
1228     ret = *this;
1229   else
1230     {
1231       ret.low = (high << (64 - amount)) | (low >> amount);
1232       ret.high = high >> amount;
1233     }
1234   return ret;
1235 }
1236
1237 inline bool
1238 omp_clause_mask::operator == (omp_clause_mask b) const
1239 {
1240   return low == b.low && high == b.high;
1241 }
1242
1243 inline bool
1244 omp_clause_mask::operator != (omp_clause_mask b) const
1245 {
1246   return low != b.low || high != b.high;
1247 }
1248
1249 #define OMP_CLAUSE_MASK_1 omp_clause_mask (1)
1250
1251 enum c_omp_clause_split
1252 {
1253   C_OMP_CLAUSE_SPLIT_TARGET = 0,
1254   C_OMP_CLAUSE_SPLIT_TEAMS,
1255   C_OMP_CLAUSE_SPLIT_DISTRIBUTE,
1256   C_OMP_CLAUSE_SPLIT_PARALLEL,
1257   C_OMP_CLAUSE_SPLIT_FOR,
1258   C_OMP_CLAUSE_SPLIT_SIMD,
1259   C_OMP_CLAUSE_SPLIT_COUNT,
1260   C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR,
1261   C_OMP_CLAUSE_SPLIT_TASKLOOP = C_OMP_CLAUSE_SPLIT_FOR
1262 };
1263
1264 enum c_omp_region_type
1265 {
1266   C_ORT_OMP                     = 1 << 0,
1267   C_ORT_CILK                    = 1 << 1,
1268   C_ORT_ACC                     = 1 << 2,
1269   C_ORT_DECLARE_SIMD            = 1 << 3,
1270   C_ORT_OMP_DECLARE_SIMD        = C_ORT_OMP | C_ORT_DECLARE_SIMD
1271 };
1272
1273 extern tree c_finish_omp_master (location_t, tree);
1274 extern tree c_finish_omp_taskgroup (location_t, tree);
1275 extern tree c_finish_omp_critical (location_t, tree, tree, tree);
1276 extern tree c_finish_omp_ordered (location_t, tree, tree);
1277 extern void c_finish_omp_barrier (location_t);
1278 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1279                                  tree, tree, tree, tree, tree, bool, bool,
1280                                  bool = false);
1281 extern void c_finish_omp_flush (location_t);
1282 extern void c_finish_omp_taskwait (location_t);
1283 extern void c_finish_omp_taskyield (location_t);
1284 extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree,
1285                               tree, tree, tree, tree);
1286 extern bool c_omp_check_loop_iv (tree, tree, walk_tree_lh);
1287 extern bool c_omp_check_loop_iv_exprs (location_t, tree, tree, tree, tree,
1288                                        walk_tree_lh);
1289 extern tree c_finish_oacc_wait (location_t, tree, tree);
1290 extern tree c_oacc_split_loop_clauses (tree, tree *, bool);
1291 extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask,
1292                                  tree, tree *);
1293 extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree);
1294 extern void c_omp_declare_simd_clauses_to_decls (tree, tree);
1295 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1296
1297 /* Return next tree in the chain for chain_next walking of tree nodes.  */
1298 static inline tree
1299 c_tree_chain_next (tree t)
1300 {
1301   /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1302      kind of object, never a long chain of nodes.  Prefer
1303      TYPE_NEXT_VARIANT for types.  */
1304   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1305     return TYPE_NEXT_VARIANT (t);
1306   /* Otherwise, if there is TREE_CHAIN, return it.  */
1307   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1308     return TREE_CHAIN (t);
1309   return NULL;
1310 }
1311
1312 /* Mask used by tm_stmt_attr.  */
1313 #define TM_STMT_ATTR_OUTER      2
1314 #define TM_STMT_ATTR_ATOMIC     4
1315 #define TM_STMT_ATTR_RELAXED    8
1316
1317 /* Mask used by tm_attr_to_mask and tm_mask_to_attr.  Note that these
1318    are ordered specifically such that more restrictive attributes are
1319    at lower bit positions.  This fact is known by the C++ tm attribute
1320    inheritance code such that least bit extraction (mask & -mask) results
1321    in the most restrictive attribute.  */
1322 #define TM_ATTR_SAFE                    1
1323 #define TM_ATTR_CALLABLE                2
1324 #define TM_ATTR_PURE                    4
1325 #define TM_ATTR_IRREVOCABLE             8
1326 #define TM_ATTR_MAY_CANCEL_OUTER        16
1327
1328 /* A suffix-identifier value doublet that represents user-defined literals
1329    for C++-0x.  */
1330 enum overflow_type {
1331   OT_UNDERFLOW = -1,
1332   OT_NONE,
1333   OT_OVERFLOW
1334 };
1335
1336 struct GTY(()) tree_userdef_literal {
1337   struct tree_base base;
1338   tree suffix_id;
1339   tree value;
1340   tree num_string;
1341   enum overflow_type overflow;
1342 };
1343
1344 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1345   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1346
1347 #define USERDEF_LITERAL_VALUE(NODE) \
1348   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1349
1350 #define USERDEF_LITERAL_OVERFLOW(NODE) \
1351   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1352
1353 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1354   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1355
1356 #define USERDEF_LITERAL_TYPE(NODE) \
1357   (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1358
1359 extern tree build_userdef_literal (tree suffix_id, tree value,
1360                                    enum overflow_type overflow,
1361                                    tree num_string);
1362
1363 extern bool convert_vector_to_array_for_subscript (location_t, tree *, tree);
1364
1365 /* Possibe cases of scalar_to_vector conversion.  */
1366 enum stv_conv {
1367   stv_error,        /* Error occurred.  */
1368   stv_nothing,      /* Nothing happened.  */
1369   stv_firstarg,     /* First argument must be expanded.  */
1370   stv_secondarg     /* Second argument must be expanded.  */
1371 };
1372
1373 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1374                                        tree op0, tree op1, bool);
1375
1376 /* In c-cilkplus.c  */
1377 extern tree c_validate_cilk_plus_loop (tree *, int *, void *);
1378 extern bool c_check_cilk_loop (location_t, tree);
1379
1380 /* These #defines allow users to access different operands of the
1381    array notation tree.  */
1382
1383 #define ARRAY_NOTATION_CHECK(NODE) TREE_CHECK (NODE, ARRAY_NOTATION_REF)
1384 #define ARRAY_NOTATION_ARRAY(NODE) \
1385   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 0)
1386 #define ARRAY_NOTATION_START(NODE) \
1387   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 1)
1388 #define ARRAY_NOTATION_LENGTH(NODE) \
1389   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 2)
1390 #define ARRAY_NOTATION_STRIDE(NODE) \
1391   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 3)
1392
1393 /* This structure holds all the scalar values and its appropriate variable
1394    replacment.  It is mainly used by the function that pulls all the invariant
1395    parts that should be executed only once, which comes with array notation
1396    expressions.  */
1397 struct inv_list
1398 {
1399   vec<tree, va_gc> *list_values;
1400   vec<tree, va_gc> *replacement;
1401   vec<enum tree_code, va_gc> *additional_tcodes;
1402 };
1403
1404 /* This structure holds all the important components that can be extracted
1405    from an ARRAY_NOTATION_REF expression.  It is used to pass array notation
1406    information between the functions that are responsible for expansion.  */
1407 typedef struct cilkplus_an_parts
1408 {
1409   tree value;
1410   tree start;
1411   tree length;
1412   tree stride;
1413   bool is_vector;
1414 } an_parts;
1415
1416 /* This structure holds the components necessary to create the loop around
1417    the ARRAY_REF that is created using the ARRAY_NOTATION information.  */
1418
1419 typedef struct cilkplus_an_loop_parts
1420 {
1421   tree var;         /* Loop induction variable.  */
1422   tree incr;        /* Loop increment/decrement expression.  */
1423   tree cmp;         /* Loop condition.  */
1424   tree ind_init;    /* Initialization of the loop induction variable.  */
1425 } an_loop_parts;
1426
1427 /* In array-notation-common.c.  */
1428 extern HOST_WIDE_INT extract_sec_implicit_index_arg (location_t, tree);
1429 extern bool is_sec_implicit_index_fn (tree);
1430 extern void array_notation_init_builtins (void);
1431 extern struct c_expr fix_array_notation_expr (location_t, enum tree_code,
1432                                               struct c_expr);
1433 extern bool contains_array_notation_expr (tree);
1434 extern tree expand_array_notation_exprs (tree);
1435 extern tree fix_conditional_array_notations (tree);
1436 extern tree find_correct_array_notation_type (tree);
1437 extern bool length_mismatch_in_expr_p (location_t, vec<vec<an_parts> >);
1438 extern enum built_in_function is_cilkplus_reduce_builtin (tree);
1439 extern bool find_rank (location_t, tree, tree, bool, size_t *);
1440 extern void extract_array_notation_exprs (tree, bool, vec<tree, va_gc> **);
1441 extern void replace_array_notations (tree *, bool, vec<tree, va_gc> *,
1442                                      vec<tree, va_gc> *);
1443 extern tree find_inv_trees (tree *, int *, void *);
1444 extern tree replace_inv_trees (tree *, int *, void *);
1445 extern tree find_correct_array_notation_type (tree op);
1446 extern void cilkplus_extract_an_triplets (vec<tree, va_gc> *, size_t, size_t,
1447                                           vec<vec<an_parts> > *);
1448 extern vec <tree, va_gc> *fix_sec_implicit_args
1449   (location_t, vec <tree, va_gc> *, vec<an_loop_parts>, size_t, tree);
1450 extern bool is_cilkplus_vector_p (tree);
1451
1452 /* In cilk.c.  */
1453 extern tree insert_cilk_frame (tree);
1454 extern void cilk_init_builtins (void);
1455 extern int gimplify_cilk_spawn (tree *);
1456 extern void cilk_gimplify_call_params_in_spawned_fn (tree *, gimple_seq *);
1457 extern void cilk_install_body_with_frame_cleanup (tree, tree, void *);
1458 extern bool cilk_detect_spawn_and_unwrap (tree *);
1459 extern bool cilk_set_spawn_marker (location_t, tree);
1460 extern tree build_cilk_sync (void);
1461 extern tree build_cilk_spawn (location_t, tree);
1462 extern tree make_cilk_frame (tree);
1463 extern tree create_cilk_function_exit (tree, bool, bool);
1464 extern tree cilk_install_body_pedigree_operations (tree);
1465 extern void cilk_outline (tree, tree *, void *);
1466 extern bool contains_cilk_spawn_stmt (tree);
1467 extern tree cilk_for_number_of_iterations (tree);
1468 extern bool check_no_cilk (tree, const char *, const char *,
1469                            location_t loc = UNKNOWN_LOCATION);
1470 extern bool reject_gcc_builtin (const_tree, location_t = UNKNOWN_LOCATION);
1471 extern bool valid_array_size_p (location_t, tree, tree);
1472
1473 extern bool cilk_ignorable_spawn_rhs_op (tree);
1474 extern bool cilk_recognize_spawn (tree, tree *);
1475
1476 /* In c-warn.c.  */
1477 extern void constant_expression_warning (tree);
1478 extern void constant_expression_error (tree);
1479 extern void overflow_warning (location_t, tree);
1480 extern void warn_logical_operator (location_t, enum tree_code, tree,
1481                                    enum tree_code, tree, enum tree_code, tree);
1482 extern void warn_tautological_cmp (location_t, enum tree_code, tree, tree);
1483 extern void warn_logical_not_parentheses (location_t, enum tree_code, tree,
1484                                           tree);
1485 extern bool warn_if_unused_value (const_tree, location_t);
1486 extern bool strict_aliasing_warning (tree, tree, tree);
1487 extern void sizeof_pointer_memaccess_warning (location_t *, tree,
1488                                               vec<tree, va_gc> *, tree *,
1489                                               bool (*) (tree, tree));
1490 extern void check_main_parameter_types (tree decl);
1491 extern void warnings_for_convert_and_check (location_t, tree, tree, tree);
1492 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree, bool,
1493                                   bool);
1494 extern void warn_for_omitted_condop (location_t, tree);
1495
1496 /* Places where an lvalue, or modifiable lvalue, may be required.
1497    Used to select diagnostic messages in lvalue_error and
1498    readonly_error.  */
1499 enum lvalue_use {
1500   lv_assign,
1501   lv_increment,
1502   lv_decrement,
1503   lv_addressof,
1504   lv_asm
1505 };
1506
1507 extern void lvalue_error (location_t, enum lvalue_use);
1508 extern void invalid_indirection_error (location_t, tree, ref_operator);
1509 extern void readonly_error (location_t, tree, enum lvalue_use);
1510 extern void warn_array_subscript_with_type_char (location_t, tree);
1511 extern void warn_about_parentheses (location_t,
1512                                     enum tree_code,
1513                                     enum tree_code, tree,
1514                                     enum tree_code, tree);
1515 extern void warn_for_unused_label (tree label);
1516 extern void warn_for_div_by_zero (location_t, tree divisor);
1517 extern void warn_for_memset (location_t, tree, tree, int);
1518 extern void warn_for_sign_compare (location_t,
1519                                    tree orig_op0, tree orig_op1,
1520                                    tree op0, tree op1,
1521                                    tree result_type,
1522                                    enum tree_code resultcode);
1523 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1524                                       location_t);
1525 extern void do_warn_unused_parameter (tree);
1526 extern void record_locally_defined_typedef (tree);
1527 extern void maybe_record_typedef_use (tree);
1528 extern void maybe_warn_unused_local_typedefs (void);
1529 extern void maybe_warn_bool_compare (location_t, enum tree_code, tree, tree);
1530 extern bool maybe_warn_shift_overflow (location_t, tree, tree);
1531 extern void warn_duplicated_cond_add_or_warn (location_t, tree, vec<tree> **);
1532 extern bool diagnose_mismatched_attributes (tree, tree);
1533
1534 /* In c-attribs.c.  */
1535 extern bool attribute_takes_identifier_p (const_tree);
1536 extern tree handle_unused_attribute (tree *, tree, tree, int, bool *);
1537 extern int parse_tm_stmt_attr (tree, int);
1538 extern int tm_attr_to_mask (tree);
1539 extern tree tm_mask_to_attr (int);
1540 extern tree find_tm_attribute (tree);
1541
1542 #if CHECKING_P
1543 namespace selftest {
1544   extern void c_format_c_tests (void);
1545   extern void run_c_tests (void);
1546 } // namespace selftest
1547 #endif /* #if CHECKING_P */
1548
1549 #endif /* ! GCC_C_COMMON_H */