gcc/c-family/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987-2013 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 "ggc.h"
  26 #include "tree.h"
  27
  28 /* In order for the format checking to accept the C frontend
  29    diagnostic framework extensions, you must include this file before
  30    diagnostic-core.h, not after.  The C front end formats are a subset of those
  31    for C++, so they are the appropriate set to use in common code;
  32    cp-tree.h overrides this for C++.  */
  33 #if defined(GCC_DIAGNOSTIC_CORE_H)
  34 #error \
  35 In order for the format checking to accept the C front end diagnostic \
  36 framework extensions, you must include this file before diagnostic-core.h \
  37 never after.
  38 #endif
  39 #ifndef GCC_DIAG_STYLE
  40 #define GCC_DIAG_STYLE __gcc_cdiag__
  41 #endif
  42 #include "diagnostic-core.h"
  43
  44 /* Usage of TREE_LANG_FLAG_?:
  45    0: IDENTIFIER_MARKED (used by search routines).
  46       C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
  47    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  48       STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
  49       C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
  50    2: unused
  51    3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
  52    4: unused
  53 */
  54
  55 /* Reserved identifiers.  This is the union of all the keywords for C,
  56    C++, and Objective-C.  All the type modifiers have to be in one
  57    block at the beginning, because they are used as mask bits.  There
  58    are 28 type modifiers; if we add many more we will have to redesign
  59    the mask mechanism.  */
  60
  61 enum rid
  62 {
  63   /* Modifiers: */
  64   /* C, in empirical order of frequency.  */
  65   RID_STATIC = 0,
  66   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  67   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  68   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  69   RID_NORETURN,
  70
  71   /* C extensions */
  72   RID_COMPLEX, RID_THREAD, RID_SAT,
  73
  74   /* C++ */
  75   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  76
  77   /* ObjC ("PQ" reserved words - they do not appear after a '@' and
  78      are keywords only in specific contexts)  */
  79   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  80
  81   /* ObjC ("PATTR" reserved words - they do not appear after a '@'
  82      and are keywords only as property attributes)  */
  83   RID_GETTER, RID_SETTER,
  84   RID_READONLY, RID_READWRITE,
  85   RID_ASSIGN, RID_RETAIN, RID_COPY,
  86   RID_NONATOMIC,
  87
  88   /* C (reserved and imaginary types not implemented, so any use is a
  89      syntax error) */
  90   RID_IMAGINARY,
  91
  92   /* C */
  93   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  94   RID_INT128,
  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   RID_FRACT, RID_ACCUM,
 106
 107   /* C11 */
 108   RID_ALIGNAS,
 109
 110   /* This means to warn that this is a C++ keyword, and then treat it
 111      as a normal identifier.  */
 112   RID_CXX_COMPAT_WARN,
 113
 114   /* GNU transactional memory extension */
 115   RID_TRANSACTION_ATOMIC, RID_TRANSACTION_RELAXED, RID_TRANSACTION_CANCEL,
 116
 117   /* Too many ways of getting the name of a function as a string */
 118   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
 119
 120   /* C++ (some of these are keywords in Objective-C as well, but only
 121      if they appear after a '@') */
 122   RID_BOOL,     RID_WCHAR,    RID_CLASS,
 123   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
 124   RID_TEMPLATE, RID_NULL,     RID_CATCH,
 125   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
 126   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
 127   RID_THIS,     RID_THROW,    RID_TRUE,
 128   RID_TRY,      RID_TYPENAME, RID_TYPEID,
 129   RID_USING,    RID_CHAR16,   RID_CHAR32,
 130
 131   /* casts */
 132   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 133
 134   /* C++ extensions */
 135   RID_BASES,                   RID_DIRECT_BASES,
 136   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 137   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 138   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 139   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 140   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 141   RID_IS_CLASS,                RID_IS_CONVERTIBLE_TO,
 142   RID_IS_EMPTY,                RID_IS_ENUM,
 143   RID_IS_FINAL,                RID_IS_LITERAL_TYPE,
 144   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 145   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 146   RID_IS_UNION,                RID_UNDERLYING_TYPE,
 147
 148   /* C++11 */
 149   RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
 150
 151   /* Objective-C ("AT" reserved words - they are only keywords when
 152      they follow '@')  */
 153   RID_AT_ENCODE,   RID_AT_END,
 154   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 155   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,  RID_AT_PACKAGE,
 156   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 157   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 158   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 159   RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
 160   RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
 161   RID_AT_INTERFACE,
 162   RID_AT_IMPLEMENTATION,
 163
 164   /* Named address support, mapping the keyword to a particular named address
 165      number.  Named address space 0 is reserved for the generic address.  If
 166      there are more than 254 named addresses, the addr_space_t type will need
 167      to be grown from an unsigned char to unsigned short.  */
 168   RID_ADDR_SPACE_0,             /* generic address */
 169   RID_ADDR_SPACE_1,
 170   RID_ADDR_SPACE_2,
 171   RID_ADDR_SPACE_3,
 172   RID_ADDR_SPACE_4,
 173   RID_ADDR_SPACE_5,
 174   RID_ADDR_SPACE_6,
 175   RID_ADDR_SPACE_7,
 176   RID_ADDR_SPACE_8,
 177   RID_ADDR_SPACE_9,
 178   RID_ADDR_SPACE_10,
 179   RID_ADDR_SPACE_11,
 180   RID_ADDR_SPACE_12,
 181   RID_ADDR_SPACE_13,
 182   RID_ADDR_SPACE_14,
 183   RID_ADDR_SPACE_15,
 184
 185   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 186   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 187
 188   RID_MAX,
 189
 190   RID_FIRST_MODIFIER = RID_STATIC,
 191   RID_LAST_MODIFIER = RID_ONEWAY,
 192
 193   RID_FIRST_CXX0X = RID_CONSTEXPR,
 194   RID_LAST_CXX0X = RID_STATIC_ASSERT,
 195   RID_FIRST_AT = RID_AT_ENCODE,
 196   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 197   RID_FIRST_PQ = RID_IN,
 198   RID_LAST_PQ = RID_ONEWAY,
 199   RID_FIRST_PATTR = RID_GETTER,
 200   RID_LAST_PATTR = RID_NONATOMIC
 201 };
 202
 203 #define OBJC_IS_AT_KEYWORD(rid) \
 204   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 205    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 206
 207 #define OBJC_IS_PQ_KEYWORD(rid) \
 208   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 209    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 210
 211 #define OBJC_IS_PATTR_KEYWORD(rid) \
 212   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
 213    (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
 214
 215 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
 216    'class') which are shared in a subtle way between Objective-C and
 217    C++.  When the lexer is lexing in Objective-C/Objective-C++, if it
 218    finds '@' followed by one of these identifiers (eg, '@class'), it
 219    recognizes the whole as an Objective-C keyword.  If the identifier
 220    is found elsewhere, it follows the rules of the C/C++ language.
 221  */
 222 #define OBJC_IS_CXX_KEYWORD(rid) \
 223   (rid == RID_CLASS                                                     \
 224    || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE   \
 225    || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
 226
 227 /* The elements of `ridpointers' are identifier nodes for the reserved
 228    type names and storage classes.  It is indexed by a RID_... value.  */
 229 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 230
 231 /* Standard named or nameless data types of the C compiler.  */
 232
 233 enum c_tree_index
 234 {
 235     CTI_CHAR16_TYPE,
 236     CTI_CHAR32_TYPE,
 237     CTI_WCHAR_TYPE,
 238     CTI_UNDERLYING_WCHAR_TYPE,
 239     CTI_WINT_TYPE,
 240     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 241     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 242     CTI_INTMAX_TYPE,
 243     CTI_UINTMAX_TYPE,
 244     CTI_WIDEST_INT_LIT_TYPE,
 245     CTI_WIDEST_UINT_LIT_TYPE,
 246
 247     /* Types for <stdint.h>, that may not be defined on all
 248        targets.  */
 249     CTI_SIG_ATOMIC_TYPE,
 250     CTI_INT8_TYPE,
 251     CTI_INT16_TYPE,
 252     CTI_INT32_TYPE,
 253     CTI_INT64_TYPE,
 254     CTI_UINT8_TYPE,
 255     CTI_UINT16_TYPE,
 256     CTI_UINT32_TYPE,
 257     CTI_UINT64_TYPE,
 258     CTI_INT_LEAST8_TYPE,
 259     CTI_INT_LEAST16_TYPE,
 260     CTI_INT_LEAST32_TYPE,
 261     CTI_INT_LEAST64_TYPE,
 262     CTI_UINT_LEAST8_TYPE,
 263     CTI_UINT_LEAST16_TYPE,
 264     CTI_UINT_LEAST32_TYPE,
 265     CTI_UINT_LEAST64_TYPE,
 266     CTI_INT_FAST8_TYPE,
 267     CTI_INT_FAST16_TYPE,
 268     CTI_INT_FAST32_TYPE,
 269     CTI_INT_FAST64_TYPE,
 270     CTI_UINT_FAST8_TYPE,
 271     CTI_UINT_FAST16_TYPE,
 272     CTI_UINT_FAST32_TYPE,
 273     CTI_UINT_FAST64_TYPE,
 274     CTI_INTPTR_TYPE,
 275     CTI_UINTPTR_TYPE,
 276
 277     CTI_CHAR_ARRAY_TYPE,
 278     CTI_CHAR16_ARRAY_TYPE,
 279     CTI_CHAR32_ARRAY_TYPE,
 280     CTI_WCHAR_ARRAY_TYPE,
 281     CTI_INT_ARRAY_TYPE,
 282     CTI_STRING_TYPE,
 283     CTI_CONST_STRING_TYPE,
 284
 285     /* Type for boolean expressions (bool in C++, int in C).  */
 286     CTI_TRUTHVALUE_TYPE,
 287     CTI_TRUTHVALUE_TRUE,
 288     CTI_TRUTHVALUE_FALSE,
 289
 290     CTI_DEFAULT_FUNCTION_TYPE,
 291
 292     /* These are not types, but we have to look them up all the time.  */
 293     CTI_FUNCTION_NAME_DECL,
 294     CTI_PRETTY_FUNCTION_NAME_DECL,
 295     CTI_C99_FUNCTION_NAME_DECL,
 296     CTI_SAVED_FUNCTION_NAME_DECLS,
 297
 298     CTI_VOID_ZERO,
 299
 300     CTI_NULL,
 301
 302     CTI_MAX
 303 };
 304
 305 #define C_CPP_HASHNODE(id) \
 306   (&(((struct c_common_identifier *) (id))->node))
 307 #define C_RID_CODE(id) \
 308   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 309 #define C_SET_RID_CODE(id, code) \
 310   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 311
 312 /* Identifier part common to the C front ends.  Inherits from
 313    tree_identifier, despite appearances.  */
 314 struct GTY(()) c_common_identifier {
 315   struct tree_common common;
 316   struct cpp_hashnode node;
 317 };
 318
 319 /* An entry in the reserved keyword table.  */
 320
 321 struct c_common_resword
 322 {
 323   const char *const word;
 324   ENUM_BITFIELD(rid) const rid : 16;
 325   const unsigned int disable   : 16;
 326 };
 327
 328 /* Extra cpp_ttype values for C++.  */
 329
 330 /* A token type for keywords, as opposed to ordinary identifiers.  */
 331 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
 332
 333 /* A token type for template-ids.  If a template-id is processed while
 334    parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
 335    the value of the CPP_TEMPLATE_ID is whatever was returned by
 336    cp_parser_template_id.  */
 337 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
 338
 339 /* A token type for nested-name-specifiers.  If a
 340    nested-name-specifier is processed while parsing tentatively, it is
 341    replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
 342    CPP_NESTED_NAME_SPECIFIER is whatever was returned by
 343    cp_parser_nested_name_specifier_opt.  */
 344 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
 345
 346 /* A token type for pre-parsed C++0x decltype.  */
 347 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
 348
 349 /* The number of token types, including C++-specific ones.  */
 350 #define N_CP_TTYPES ((int) (CPP_DECLTYPE + 1))
 351
 352 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 353    mask) is _true_.  Thus for keywords which are present in all
 354    languages the disable field is zero.  */
 355
 356 #define D_CONLY         0x001   /* C only (not in C++).  */
 357 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 358 #define D_C99           0x004   /* In C, C99 only.  */
 359 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 360 #define D_EXT           0x010   /* GCC extension.  */
 361 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 362 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 363 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 364 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 365 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 366
 367 /* The reserved keyword table.  */
 368 extern const struct c_common_resword c_common_reswords[];
 369
 370 /* The number of items in the reserved keyword table.  */
 371 extern const unsigned int num_c_common_reswords;
 372
 373 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 374 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 375 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 376 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 377 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 378 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 379 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 380 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 381 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 382 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 383 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 384
 385 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 386 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 387 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 388 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 389 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 390 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 391 #define c_uint16_type_node              c_global_trees[CTI_UINT16_TYPE]
 392 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 393 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 394 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 395 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 396 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 397 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 398 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 399 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 400 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 401 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 402 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 403 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 404 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 405 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 406 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 407 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 408 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 409 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 410 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 411 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 412
 413 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 414 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 415 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 416
 417 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 418 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 419 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 420 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 421 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 422 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 423 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 424
 425 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 426
 427 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 428 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 429 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 430 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 431
 432 /* A node for `((void) 0)'.  */
 433 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 434
 435 /* The node for C++ `__null'.  */
 436 #define null_node                       c_global_trees[CTI_NULL]
 437
 438 extern GTY(()) tree c_global_trees[CTI_MAX];
 439
 440 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 441    tree for size reasons.  */
 442 struct GTY((variable_size)) sorted_fields_type {
 443   int len;
 444   tree GTY((length ("%h.len"))) elts[1];
 445 };
 446
 447 /* Mark which labels are explicitly declared.
 448    These may be shadowed, and may be referenced from nested functions.  */
 449 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 450
 451 typedef enum c_language_kind
 452 {
 453   clk_c         = 0,            /* C90, C94 or C99 */
 454   clk_objc      = 1,            /* clk_c with ObjC features.  */
 455   clk_cxx       = 2,            /* ANSI/ISO C++ */
 456   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 457 }
 458 c_language_kind;
 459
 460 /* To test for a specific language use c_language, defined by each
 461    front end.  For "ObjC features" or "not C++" use the macros.  */
 462 extern c_language_kind c_language;
 463
 464 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 465 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 466
 467 /* The various name of operator that appears in error messages. */
 468 typedef enum ref_operator {
 469   /* NULL */
 470   RO_NULL,
 471   /* array indexing */
 472   RO_ARRAY_INDEXING,
 473   /* unary * */
 474   RO_UNARY_STAR,
 475   /* -> */
 476   RO_ARROW,
 477   /* implicit conversion */
 478   RO_IMPLICIT_CONVERSION,
 479   /* ->* */
 480   RO_ARROW_STAR
 481 } ref_operator;
 482
 483 /* Information about a statement tree.  */
 484
 485 struct GTY(()) stmt_tree_s {
 486   /* A stack of statement lists being collected.  */
 487   vec<tree, va_gc> *x_cur_stmt_list;
 488
 489   /* In C++, Nonzero if we should treat statements as full
 490      expressions.  In particular, this variable is non-zero if at the
 491      end of a statement we should destroy any temporaries created
 492      during that statement.  Similarly, if, at the end of a block, we
 493      should destroy any local variables in this block.  Normally, this
 494      variable is nonzero, since those are the normal semantics of
 495      C++.
 496
 497      This flag has no effect in C.  */
 498   int stmts_are_full_exprs_p;
 499 };
 500
 501 typedef struct stmt_tree_s *stmt_tree;
 502
 503 /* Global state pertinent to the current function.  Some C dialects
 504    extend this structure with additional fields.  */
 505
 506 struct GTY(()) c_language_function {
 507   /* While we are parsing the function, this contains information
 508      about the statement-tree that we are building.  */
 509   struct stmt_tree_s x_stmt_tree;
 510
 511   /* Vector of locally defined typedefs, for
 512      -Wunused-local-typedefs.  */
 513   vec<tree, va_gc> *local_typedefs;
 514 };
 515
 516 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
 517
 518 /* When building a statement-tree, this is the current statement list
 519    being collected.  */
 520 #define cur_stmt_list   (stmt_list_stack->last ())
 521
 522 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
 523
 524 /* Language-specific hooks.  */
 525
 526 /* If non-NULL, this function is called after a precompile header file
 527    is loaded.  */
 528 extern void (*lang_post_pch_load) (void);
 529
 530 extern void push_file_scope (void);
 531 extern void pop_file_scope (void);
 532 extern stmt_tree current_stmt_tree (void);
 533 extern tree push_stmt_list (void);
 534 extern tree pop_stmt_list (tree);
 535 extern tree add_stmt (tree);
 536 extern void push_cleanup (tree, tree, bool);
 537 extern tree pushdecl_top_level (tree);
 538 extern tree pushdecl (tree);
 539 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 540                                location_t, tree, tree);
 541 extern tree build_array_notation_expr (location_t, tree, tree, enum tree_code,
 542                                        location_t, tree, tree);
 543 extern tree build_array_notation_ref (location_t, tree, tree, tree, tree, tree);
 544 extern tree build_indirect_ref (location_t, tree, ref_operator);
 545
 546 extern int field_decl_cmp (const void *, const void *);
 547 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 548                                   void *);
 549 extern bool has_c_linkage (const_tree decl);
 550 \f
 551 /* Switches common to the C front ends.  */
 552
 553 /* Nonzero means don't output line number information.  */
 554
 555 extern char flag_no_line_commands;
 556
 557 /* Nonzero causes -E output not to be done, but directives such as
 558    #define that have side effects are still obeyed.  */
 559
 560 extern char flag_no_output;
 561
 562 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 563    'N' or 'U' of the command line switch.  */
 564
 565 extern char flag_dump_macros;
 566
 567 /* Nonzero means pass #include lines through to the output.  */
 568
 569 extern char flag_dump_includes;
 570
 571 /* Nonzero means process PCH files while preprocessing.  */
 572
 573 extern bool flag_pch_preprocess;
 574
 575 /* The file name to which we should write a precompiled header, or
 576    NULL if no header will be written in this compile.  */
 577
 578 extern const char *pch_file;
 579
 580 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 581    user's namespace.  */
 582
 583 extern int flag_iso;
 584
 585 /* C/ObjC language option variables.  */
 586
 587
 588 /* Nonzero means allow type mismatches in conditional expressions;
 589    just make their values `void'.  */
 590
 591 extern int flag_cond_mismatch;
 592
 593 /* Nonzero means enable C89 Amendment 1 features.  */
 594
 595 extern int flag_isoc94;
 596
 597 /* Nonzero means use the ISO C99 (or C11) dialect of C.  */
 598
 599 extern int flag_isoc99;
 600
 601 /* Nonzero means use the ISO C11 dialect of C.  */
 602
 603 extern int flag_isoc11;
 604
 605 /* Nonzero means that we have builtin functions, and main is an int.  */
 606
 607 extern int flag_hosted;
 608
 609 /* ObjC language option variables.  */
 610
 611
 612 /* Tells the compiler that this is a special run.  Do not perform any
 613    compiling, instead we are to test some platform dependent features
 614    and output a C header file with appropriate definitions.  */
 615
 616 extern int print_struct_values;
 617
 618 /* Tells the compiler what is the constant string class for ObjC.  */
 619
 620 extern const char *constant_string_class_name;
 621
 622
 623 /* C++ language option variables.  */
 624
 625
 626 /* Nonzero means generate separate instantiation control files and
 627    juggle them at link time.  */
 628
 629 extern int flag_use_repository;
 630
 631 /* The supported C++ dialects.  */
 632
 633 enum cxx_dialect {
 634   /* C++98 with TC1  */
 635   cxx98,
 636   cxx03 = cxx98,
 637   /* C++11  */
 638   cxx0x,
 639   cxx11 = cxx0x,
 640   /* C++1y (C++17?) */
 641   cxx1y
 642 };
 643
 644 /* The C++ dialect being used. C++98 is the default.  */
 645 extern enum cxx_dialect cxx_dialect;
 646
 647 /* Maximum template instantiation depth.  This limit is rather
 648    arbitrary, but it exists to limit the time it takes to notice
 649    excessively recursive template instantiations.  */
 650
 651 extern int max_tinst_depth;
 652
 653 /* Nonzero means that we should not issue warnings about problems that
 654    occur when the code is executed, because the code being processed
 655    is not expected to be executed.  This is set during parsing.  This
 656    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 657    not a bool, because unexecuted expressions can nest.  */
 658
 659 extern int c_inhibit_evaluation_warnings;
 660
 661 /* Whether lexing has been completed, so subsequent preprocessor
 662    errors should use the compiler's input_location.  */
 663
 664 extern bool done_lexing;
 665
 666 /* C types are partitioned into three subsets: object, function, and
 667    incomplete types.  */
 668 #define C_TYPE_OBJECT_P(type) \
 669   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 670
 671 #define C_TYPE_INCOMPLETE_P(type) \
 672   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 673
 674 #define C_TYPE_FUNCTION_P(type) \
 675   (TREE_CODE (type) == FUNCTION_TYPE)
 676
 677 /* For convenience we define a single macro to identify the class of
 678    object or incomplete types.  */
 679 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 680   (!C_TYPE_FUNCTION_P (type))
 681
 682 struct visibility_flags
 683 {
 684   unsigned inpragma : 1;        /* True when in #pragma GCC visibility.  */
 685   unsigned inlines_hidden : 1;  /* True when -finlineshidden in effect.  */
 686 };
 687
 688 /* Global visibility options.  */
 689 extern struct visibility_flags visibility_options;
 690
 691 /* Attribute table common to the C front ends.  */
 692 extern const struct attribute_spec c_common_attribute_table[];
 693 extern const struct attribute_spec c_common_format_attribute_table[];
 694
 695 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 696    ID is the identifier to use, NAME is the string.
 697    TYPE_DEP indicates whether it depends on type of the function or not
 698    (i.e. __PRETTY_FUNCTION__).  */
 699
 700 extern tree (*make_fname_decl) (location_t, tree, int);
 701
 702 /* In c-decl.c and cp/tree.c.  FIXME.  */
 703 extern void c_register_addr_space (const char *str, addr_space_t as);
 704
 705 /* In c-common.c.  */
 706 extern bool in_late_binary_op;
 707 extern const char *c_addr_space_name (addr_space_t as);
 708 extern tree identifier_global_value (tree);
 709 extern tree c_linkage_bindings (tree);
 710 extern void record_builtin_type (enum rid, const char *, tree);
 711 extern tree build_void_list_node (void);
 712 extern void start_fname_decls (void);
 713 extern void finish_fname_decls (void);
 714 extern const char *fname_as_string (int);
 715 extern tree fname_decl (location_t, unsigned, tree);
 716
 717 extern int check_user_alignment (const_tree, bool);
 718 extern void check_function_arguments (const_tree, int, tree *);
 719 extern void check_function_arguments_recurse (void (*)
 720                                               (void *, tree,
 721                                                unsigned HOST_WIDE_INT),
 722                                               void *, tree,
 723                                               unsigned HOST_WIDE_INT);
 724 extern bool check_builtin_function_arguments (tree, int, tree *);
 725 extern void check_function_format (tree, int, tree *);
 726 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 727 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 728 extern bool attribute_takes_identifier_p (const_tree);
 729 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
 730                                     const struct cl_option_handlers *);
 731 extern bool default_handle_c_option (size_t, const char *, int);
 732 extern tree c_common_type_for_mode (enum machine_mode, int);
 733 extern tree c_common_type_for_size (unsigned int, int);
 734 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 735                                                 int, int);
 736 extern tree c_common_unsigned_type (tree);
 737 extern tree c_common_signed_type (tree);
 738 extern tree c_common_signed_or_unsigned_type (int, tree);
 739 extern void c_common_init_ts (void);
 740 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 741 extern bool unsafe_conversion_p (tree, tree, bool);
 742 extern bool decl_with_nonnull_addr_p (const_tree);
 743 extern tree c_fully_fold (tree, bool, bool *);
 744 extern tree decl_constant_value_for_optimization (tree);
 745 extern tree c_wrap_maybe_const (tree, bool);
 746 extern tree c_save_expr (tree);
 747 extern tree c_common_truthvalue_conversion (location_t, tree);
 748 extern void c_apply_type_quals_to_decl (int, tree);
 749 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 750 extern tree c_alignof_expr (location_t, tree);
 751 /* Print an error message for invalid operands to arith operation CODE.
 752    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 753 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 754 extern tree fix_string_type (tree);
 755 extern void constant_expression_warning (tree);
 756 extern void constant_expression_error (tree);
 757 extern bool strict_aliasing_warning (tree, tree, tree);
 758 extern void sizeof_pointer_memaccess_warning (location_t *, tree,
 759                                               vec<tree, va_gc> *, tree *,
 760                                               bool (*) (tree, tree));
 761 extern void warnings_for_convert_and_check (tree, tree, tree);
 762 extern tree convert_and_check (tree, tree);
 763 extern void overflow_warning (location_t, tree);
 764 extern bool warn_if_unused_value (const_tree, location_t);
 765 extern void warn_logical_operator (location_t, enum tree_code, tree,
 766                                    enum tree_code, tree, enum tree_code, tree);
 767 extern void check_main_parameter_types (tree decl);
 768 extern bool c_determine_visibility (tree);
 769 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 770 extern void mark_valid_location_for_stdc_pragma (bool);
 771 extern bool valid_location_for_stdc_pragma_p (void);
 772 extern void set_float_const_decimal64 (void);
 773 extern void clear_float_const_decimal64 (void);
 774 extern bool float_const_decimal64_p (void);
 775
 776 extern bool keyword_begins_type_specifier (enum rid);
 777 extern bool keyword_is_storage_class_specifier (enum rid);
 778 extern bool keyword_is_type_qualifier (enum rid);
 779 extern bool keyword_is_decl_specifier (enum rid);
 780 extern bool cxx_fundamental_alignment_p (unsigned);
 781
 782 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 783 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
 784
 785 /* Subroutine of build_binary_op, used for certain operations.  */
 786 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 787
 788 /* Subroutine of build_binary_op, used for comparison operations.
 789    See if the operands have both been converted from subword integer types
 790    and, if so, perhaps change them both back to their original type.  */
 791 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 792
 793 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
 794
 795 /* Add qualifiers to a type, in the fashion for C.  */
 796 extern tree c_build_qualified_type (tree, int);
 797
 798 /* Build tree nodes and builtin functions common to both C and C++ language
 799    frontends.  */
 800 extern void c_common_nodes_and_builtins (void);
 801
 802 extern void disable_builtin_function (const char *);
 803
 804 extern void set_compound_literal_name (tree decl);
 805
 806 extern tree build_va_arg (location_t, tree, tree);
 807
 808 extern const unsigned int c_family_lang_mask;
 809 extern unsigned int c_common_option_lang_mask (void);
 810 extern void c_common_initialize_diagnostics (diagnostic_context *);
 811 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
 812 extern void c_common_init_options_struct (struct gcc_options *);
 813 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
 814 extern bool c_common_post_options (const char **);
 815 extern bool c_common_init (void);
 816 extern void c_common_finish (void);
 817 extern void c_common_parse_file (void);
 818 extern alias_set_type c_common_get_alias_set (tree);
 819 extern void c_register_builtin_type (tree, const char*);
 820 extern bool c_promoting_integer_type_p (const_tree);
 821 extern int self_promoting_args_p (const_tree);
 822 extern tree strip_pointer_operator (tree);
 823 extern tree strip_pointer_or_array_types (tree);
 824 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 825
 826 /* This is the basic parsing function.  */
 827 extern void c_parse_file (void);
 828
 829 extern void warn_for_omitted_condop (location_t, tree);
 830
 831 /* These macros provide convenient access to the various _STMT nodes.  */
 832
 833 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 834    if a statement expression.  */
 835 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 836   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 837
 838 /* Nonzero if a label has been added to the statement list.  */
 839 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 840   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 841
 842 /* C_MAYBE_CONST_EXPR accessors.  */
 843 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 844   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 845 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 846   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 847 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 848   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 849 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 850   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 851 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 852   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 853    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 854        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 855            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 856
 857 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 858 #define DECL_C_BIT_FIELD(NODE) \
 859   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 860 #define SET_DECL_C_BIT_FIELD(NODE) \
 861   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 862 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 863   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 864
 865 extern tree do_case (location_t, tree, tree);
 866 extern tree build_stmt (location_t, enum tree_code, ...);
 867 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
 868
 869 /* These functions must be defined by each front-end which implements
 870    a variant of the C language.  They are used in c-common.c.  */
 871
 872 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 873 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 874 extern tree perform_integral_promotions (tree);
 875
 876 /* These functions must be defined by each front-end which implements
 877    a variant of the C language.  They are used by port files.  */
 878
 879 extern tree default_conversion (tree);
 880
 881 /* Given two integer or real types, return the type for their sum.
 882    Given two compatible ANSI C types, returns the merged type.  */
 883
 884 extern tree common_type (tree, tree);
 885
 886 extern tree decl_constant_value (tree);
 887
 888 /* Handle increment and decrement of boolean types.  */
 889 extern tree boolean_increment (enum tree_code, tree);
 890
 891 extern int case_compare (splay_tree_key, splay_tree_key);
 892
 893 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 894
 895 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 896
 897 extern tree build_function_call (location_t, tree, tree);
 898
 899 extern tree build_function_call_vec (location_t, tree, vec<tree, va_gc> *,
 900                                      vec<tree, va_gc> *);
 901
 902 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
 903
 904 extern tree finish_label_address_expr (tree, location_t);
 905
 906 /* Same function prototype, but the C and C++ front ends have
 907    different implementations.  Used in c-common.c.  */
 908 extern tree lookup_label (tree);
 909 extern tree lookup_name (tree);
 910 extern bool lvalue_p (const_tree);
 911
 912 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 913 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 914 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree);
 915
 916 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 917
 918 extern void init_c_lex (void);
 919
 920 extern void c_cpp_builtins (cpp_reader *);
 921 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 922 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
 923                          const char *, va_list *)
 924      ATTRIBUTE_GCC_DIAG(6,0);
 925
 926 extern bool parse_optimize_options (tree, bool);
 927
 928 /* Positive if an implicit `extern "C"' scope has just been entered;
 929    negative if such a scope has just been exited.  */
 930 extern GTY(()) int pending_lang_change;
 931
 932 /* Information recorded about each file examined during compilation.  */
 933
 934 struct c_fileinfo
 935 {
 936   int time;     /* Time spent in the file.  */
 937
 938   /* Flags used only by C++.
 939      INTERFACE_ONLY nonzero means that we are in an "interface" section
 940      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
 941      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
 942      INTERFACE_ONLY is zero, it means that we are responsible for
 943      exporting definitions that others might need.  */
 944   short interface_only;
 945   short interface_unknown;
 946 };
 947
 948 struct c_fileinfo *get_fileinfo (const char *);
 949 extern void dump_time_statistics (void);
 950
 951 extern bool c_dump_tree (void *, tree);
 952
 953 extern void verify_sequence_points (tree);
 954
 955 extern tree fold_offsetof_1 (tree);
 956 extern tree fold_offsetof (tree);
 957
 958 /* Places where an lvalue, or modifiable lvalue, may be required.
 959    Used to select diagnostic messages in lvalue_error and
 960    readonly_error.  */
 961 enum lvalue_use {
 962   lv_assign,
 963   lv_increment,
 964   lv_decrement,
 965   lv_addressof,
 966   lv_asm
 967 };
 968
 969 extern void readonly_error (tree, enum lvalue_use);
 970 extern void lvalue_error (location_t, enum lvalue_use);
 971 extern void invalid_indirection_error (location_t, tree, ref_operator);
 972
 973 extern int complete_array_type (tree *, tree, bool);
 974
 975 extern tree builtin_type_for_size (int, bool);
 976
 977 extern void c_common_mark_addressable_vec (tree);
 978
 979 extern void warn_array_subscript_with_type_char (tree);
 980 extern void warn_about_parentheses (location_t,
 981                                     enum tree_code,
 982                                     enum tree_code, tree,
 983                                     enum tree_code, tree);
 984 extern void warn_for_unused_label (tree label);
 985 extern void warn_for_div_by_zero (location_t, tree divisor);
 986 extern void warn_for_sign_compare (location_t,
 987                                    tree orig_op0, tree orig_op1,
 988                                    tree op0, tree op1,
 989                                    tree result_type,
 990                                    enum tree_code resultcode);
 991 extern void do_warn_double_promotion (tree, tree, tree, const char *,
 992                                       location_t);
 993 extern void set_underlying_type (tree);
 994 extern void record_locally_defined_typedef (tree);
 995 extern void maybe_record_typedef_use (tree);
 996 extern void maybe_warn_unused_local_typedefs (void);
 997 extern vec<tree, va_gc> *make_tree_vector (void);
 998 extern void release_tree_vector (vec<tree, va_gc> *);
 999 extern vec<tree, va_gc> *make_tree_vector_single (tree);
1000 extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1001 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1002
1003 /* In c-gimplify.c  */
1004 extern void c_genericize (tree);
1005 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1006 extern tree c_build_bind_expr (location_t, tree, tree);
1007
1008 /* In c-pch.c  */
1009 extern void pch_init (void);
1010 extern void pch_cpp_save_state (void);
1011 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1012 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1013                                const char *orig);
1014 extern void c_common_write_pch (void);
1015 extern void c_common_no_more_pch (void);
1016 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1017
1018 /* In *-checksum.c */
1019 extern const unsigned char executable_checksum[16];
1020
1021 /* In c-cppbuiltin.c  */
1022 extern void builtin_define_std (const char *macro);
1023 extern void builtin_define_with_value (const char *, const char *, int);
1024 extern void c_stddef_cpp_builtins (void);
1025 extern void fe_file_change (const struct line_map *);
1026 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1027
1028 /* In c-ppoutput.c  */
1029 extern void init_pp_output (FILE *);
1030 extern void preprocess_file (cpp_reader *);
1031 extern void pp_file_change (const struct line_map *);
1032 extern void pp_dir_change (cpp_reader *, const char *);
1033 extern bool check_missing_format_attribute (tree, tree);
1034
1035 /* In c-omp.c  */
1036 extern tree c_finish_omp_master (location_t, tree);
1037 extern tree c_finish_omp_critical (location_t, tree, tree);
1038 extern tree c_finish_omp_ordered (location_t, tree);
1039 extern void c_finish_omp_barrier (location_t);
1040 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1041                                  tree, tree, tree, tree, tree);
1042 extern void c_finish_omp_flush (location_t);
1043 extern void c_finish_omp_taskwait (location_t);
1044 extern void c_finish_omp_taskyield (location_t);
1045 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1046 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1047 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1048
1049 /* Not in c-omp.c; provided by the front end.  */
1050 extern bool c_omp_sharing_predetermined (tree);
1051 extern tree c_omp_remap_decl (tree, bool);
1052 extern void record_types_used_by_current_var_decl (tree);
1053
1054 /* Return next tree in the chain for chain_next walking of tree nodes.  */
1055 static inline tree
1056 c_tree_chain_next (tree t)
1057 {
1058   /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1059      kind of object, never a long chain of nodes.  Prefer
1060      TYPE_NEXT_VARIANT for types.  */
1061   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1062     return TYPE_NEXT_VARIANT (t);
1063   /* Otherwise, if there is TREE_CHAIN, return it.  */
1064   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1065     return TREE_CHAIN (t);
1066   return NULL;
1067 }
1068
1069 /* Mask used by tm_stmt_attr.  */
1070 #define TM_STMT_ATTR_OUTER      2
1071 #define TM_STMT_ATTR_ATOMIC     4
1072 #define TM_STMT_ATTR_RELAXED    8
1073
1074 extern int parse_tm_stmt_attr (tree, int);
1075
1076 /* Mask used by tm_attr_to_mask and tm_mask_to_attr.  Note that these
1077    are ordered specifically such that more restrictive attributes are
1078    at lower bit positions.  This fact is known by the C++ tm attribute
1079    inheritance code such that least bit extraction (mask & -mask) results
1080    in the most restrictive attribute.  */
1081 #define TM_ATTR_SAFE                    1
1082 #define TM_ATTR_CALLABLE                2
1083 #define TM_ATTR_PURE                    4
1084 #define TM_ATTR_IRREVOCABLE             8
1085 #define TM_ATTR_MAY_CANCEL_OUTER        16
1086
1087 extern int tm_attr_to_mask (tree);
1088 extern tree tm_mask_to_attr (int);
1089 extern tree find_tm_attribute (tree);
1090
1091 /* A suffix-identifier value doublet that represents user-defined literals
1092    for C++-0x.  */
1093 enum overflow_type {
1094   OT_UNDERFLOW = -1,
1095   OT_NONE,
1096   OT_OVERFLOW
1097 };
1098
1099 struct GTY(()) tree_userdef_literal {
1100   struct tree_base base;
1101   tree suffix_id;
1102   tree value;
1103   tree num_string;
1104   enum overflow_type overflow;
1105 };
1106
1107 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1108   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1109
1110 #define USERDEF_LITERAL_VALUE(NODE) \
1111   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1112
1113 #define USERDEF_LITERAL_OVERFLOW(NODE) \
1114   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1115
1116 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1117   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1118
1119 #define USERDEF_LITERAL_TYPE(NODE) \
1120   (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1121
1122 extern tree build_userdef_literal (tree suffix_id, tree value,
1123                                    enum overflow_type overflow,
1124                                    tree num_string);
1125
1126 extern void convert_vector_to_pointer_for_subscript (location_t, tree*, tree);
1127
1128 /* Possibe cases of scalar_to_vector conversion.  */
1129 enum stv_conv {
1130   stv_error,        /* Error occured.  */
1131   stv_nothing,      /* Nothing happened.  */
1132   stv_firstarg,     /* First argument must be expanded.  */
1133   stv_secondarg     /* Second argument must be expanded.  */
1134 };
1135
1136 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1137                                        tree op0, tree op1, bool);
1138
1139 /* These #defines allow users to access different operands of the
1140    array notation tree.  */
1141
1142 #define ARRAY_NOTATION_CHECK(NODE) TREE_CHECK (NODE, ARRAY_NOTATION_REF)
1143 #define ARRAY_NOTATION_ARRAY(NODE) \
1144   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 0)
1145 #define ARRAY_NOTATION_START(NODE) \
1146   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 1)
1147 #define ARRAY_NOTATION_LENGTH(NODE) \
1148   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 2)
1149 #define ARRAY_NOTATION_STRIDE(NODE) \
1150   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 3)
1151
1152 /* This structure holds all the scalar values and its appropriate variable
1153    replacment.  It is mainly used by the function that pulls all the invariant
1154    parts that should be executed only once, which comes with array notation
1155    expressions.  */
1156 struct inv_list
1157 {
1158   vec<tree, va_gc> *list_values;
1159   vec<tree, va_gc> *replacement;
1160   vec<enum tree_code, va_gc> *additional_tcodes;
1161 };
1162
1163 /* This structure holds all the important components that can be extracted
1164    from an ARRAY_NOTATION_REF expression.  It is used to pass array notation
1165    information between the functions that are responsible for expansion.  */
1166 typedef struct cilkplus_an_parts
1167 {
1168   tree value;
1169   tree start;
1170   tree length;
1171   tree stride;
1172   bool is_vector;
1173 } an_parts;
1174
1175 /* This structure holds the components necessary to create the loop around
1176    the ARRAY_REF that is created using the ARRAY_NOTATION information.  */
1177
1178 typedef struct cilkplus_an_loop_parts
1179 {
1180   tree var;         /* Loop induction variable.  */
1181   tree incr;        /* Loop increment/decrement expression.  */
1182   tree cmp;         /* Loop condition.  */
1183   tree ind_init;    /* Initialization of the loop induction variable.  */
1184 } an_loop_parts;
1185
1186 /* In array-notation-common.c.  */
1187 extern HOST_WIDE_INT extract_sec_implicit_index_arg (location_t, tree);
1188 extern bool is_sec_implicit_index_fn (tree);
1189 extern void array_notation_init_builtins (void);
1190 extern struct c_expr fix_array_notation_expr (location_t, enum tree_code,
1191                                               struct c_expr);
1192 extern bool contains_array_notation_expr (tree);
1193 extern tree expand_array_notation_exprs (tree);
1194 extern tree fix_conditional_array_notations (tree);
1195 extern tree find_correct_array_notation_type (tree);
1196 extern bool length_mismatch_in_expr_p (location_t, vec<vec<an_parts> >);
1197 extern enum built_in_function is_cilkplus_reduce_builtin (tree);
1198 extern bool find_rank (location_t, tree, tree, bool, size_t *);
1199 extern void extract_array_notation_exprs (tree, bool, vec<tree, va_gc> **);
1200 extern void replace_array_notations (tree *, bool, vec<tree, va_gc> *,
1201                                      vec<tree, va_gc> *);
1202 extern tree find_inv_trees (tree *, int *, void *);
1203 extern tree replace_inv_trees (tree *, int *, void *);
1204 extern tree find_correct_array_notation_type (tree op);
1205 extern void cilkplus_extract_an_triplets (vec<tree, va_gc> *, size_t, size_t,
1206                                           vec<vec<an_parts> > *);
1207 extern vec <tree, va_gc> *fix_sec_implicit_args
1208   (location_t, vec <tree, va_gc> *, vec<an_loop_parts>, size_t, tree);
1209 #endif /* ! GCC_C_COMMON_H */