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, RID_ATOMIC,
  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, RID_AUTO_TYPE,
 106
 107   /* C11 */
 108   RID_ALIGNAS, RID_GENERIC,
 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   /* Cilk Plus keywords.  */
 152   RID_CILK_SPAWN, RID_CILK_SYNC,
 153
 154   /* Objective-C ("AT" reserved words - they are only keywords when
 155      they follow '@')  */
 156   RID_AT_ENCODE,   RID_AT_END,
 157   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 158   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,  RID_AT_PACKAGE,
 159   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 160   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 161   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 162   RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
 163   RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
 164   RID_AT_INTERFACE,
 165   RID_AT_IMPLEMENTATION,
 166
 167   /* Named address support, mapping the keyword to a particular named address
 168      number.  Named address space 0 is reserved for the generic address.  If
 169      there are more than 254 named addresses, the addr_space_t type will need
 170      to be grown from an unsigned char to unsigned short.  */
 171   RID_ADDR_SPACE_0,             /* generic address */
 172   RID_ADDR_SPACE_1,
 173   RID_ADDR_SPACE_2,
 174   RID_ADDR_SPACE_3,
 175   RID_ADDR_SPACE_4,
 176   RID_ADDR_SPACE_5,
 177   RID_ADDR_SPACE_6,
 178   RID_ADDR_SPACE_7,
 179   RID_ADDR_SPACE_8,
 180   RID_ADDR_SPACE_9,
 181   RID_ADDR_SPACE_10,
 182   RID_ADDR_SPACE_11,
 183   RID_ADDR_SPACE_12,
 184   RID_ADDR_SPACE_13,
 185   RID_ADDR_SPACE_14,
 186   RID_ADDR_SPACE_15,
 187
 188   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 189   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 190
 191   RID_MAX,
 192
 193   RID_FIRST_MODIFIER = RID_STATIC,
 194   RID_LAST_MODIFIER = RID_ONEWAY,
 195
 196   RID_FIRST_CXX0X = RID_CONSTEXPR,
 197   RID_LAST_CXX0X = RID_STATIC_ASSERT,
 198   RID_FIRST_AT = RID_AT_ENCODE,
 199   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 200   RID_FIRST_PQ = RID_IN,
 201   RID_LAST_PQ = RID_ONEWAY,
 202   RID_FIRST_PATTR = RID_GETTER,
 203   RID_LAST_PATTR = RID_NONATOMIC
 204 };
 205
 206 #define OBJC_IS_AT_KEYWORD(rid) \
 207   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 208    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 209
 210 #define OBJC_IS_PQ_KEYWORD(rid) \
 211   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 212    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 213
 214 #define OBJC_IS_PATTR_KEYWORD(rid) \
 215   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
 216    (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
 217
 218 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
 219    'class') which are shared in a subtle way between Objective-C and
 220    C++.  When the lexer is lexing in Objective-C/Objective-C++, if it
 221    finds '@' followed by one of these identifiers (eg, '@class'), it
 222    recognizes the whole as an Objective-C keyword.  If the identifier
 223    is found elsewhere, it follows the rules of the C/C++ language.
 224  */
 225 #define OBJC_IS_CXX_KEYWORD(rid) \
 226   (rid == RID_CLASS                                                     \
 227    || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE   \
 228    || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
 229
 230 /* The elements of `ridpointers' are identifier nodes for the reserved
 231    type names and storage classes.  It is indexed by a RID_... value.  */
 232 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 233
 234 /* Standard named or nameless data types of the C compiler.  */
 235
 236 enum c_tree_index
 237 {
 238     CTI_CHAR16_TYPE,
 239     CTI_CHAR32_TYPE,
 240     CTI_WCHAR_TYPE,
 241     CTI_UNDERLYING_WCHAR_TYPE,
 242     CTI_WINT_TYPE,
 243     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 244     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 245     CTI_INTMAX_TYPE,
 246     CTI_UINTMAX_TYPE,
 247     CTI_WIDEST_INT_LIT_TYPE,
 248     CTI_WIDEST_UINT_LIT_TYPE,
 249
 250     /* Types for <stdint.h>, that may not be defined on all
 251        targets.  */
 252     CTI_SIG_ATOMIC_TYPE,
 253     CTI_INT8_TYPE,
 254     CTI_INT16_TYPE,
 255     CTI_INT32_TYPE,
 256     CTI_INT64_TYPE,
 257     CTI_UINT8_TYPE,
 258     CTI_UINT16_TYPE,
 259     CTI_UINT32_TYPE,
 260     CTI_UINT64_TYPE,
 261     CTI_INT_LEAST8_TYPE,
 262     CTI_INT_LEAST16_TYPE,
 263     CTI_INT_LEAST32_TYPE,
 264     CTI_INT_LEAST64_TYPE,
 265     CTI_UINT_LEAST8_TYPE,
 266     CTI_UINT_LEAST16_TYPE,
 267     CTI_UINT_LEAST32_TYPE,
 268     CTI_UINT_LEAST64_TYPE,
 269     CTI_INT_FAST8_TYPE,
 270     CTI_INT_FAST16_TYPE,
 271     CTI_INT_FAST32_TYPE,
 272     CTI_INT_FAST64_TYPE,
 273     CTI_UINT_FAST8_TYPE,
 274     CTI_UINT_FAST16_TYPE,
 275     CTI_UINT_FAST32_TYPE,
 276     CTI_UINT_FAST64_TYPE,
 277     CTI_INTPTR_TYPE,
 278     CTI_UINTPTR_TYPE,
 279
 280     CTI_CHAR_ARRAY_TYPE,
 281     CTI_CHAR16_ARRAY_TYPE,
 282     CTI_CHAR32_ARRAY_TYPE,
 283     CTI_WCHAR_ARRAY_TYPE,
 284     CTI_INT_ARRAY_TYPE,
 285     CTI_STRING_TYPE,
 286     CTI_CONST_STRING_TYPE,
 287
 288     /* Type for boolean expressions (bool in C++, int in C).  */
 289     CTI_TRUTHVALUE_TYPE,
 290     CTI_TRUTHVALUE_TRUE,
 291     CTI_TRUTHVALUE_FALSE,
 292
 293     CTI_DEFAULT_FUNCTION_TYPE,
 294
 295     /* These are not types, but we have to look them up all the time.  */
 296     CTI_FUNCTION_NAME_DECL,
 297     CTI_PRETTY_FUNCTION_NAME_DECL,
 298     CTI_C99_FUNCTION_NAME_DECL,
 299     CTI_SAVED_FUNCTION_NAME_DECLS,
 300
 301     CTI_VOID_ZERO,
 302
 303     CTI_NULL,
 304
 305     CTI_MAX
 306 };
 307
 308 #define C_CPP_HASHNODE(id) \
 309   (&(((struct c_common_identifier *) (id))->node))
 310 #define C_RID_CODE(id) \
 311   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 312 #define C_SET_RID_CODE(id, code) \
 313   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 314
 315 /* Identifier part common to the C front ends.  Inherits from
 316    tree_identifier, despite appearances.  */
 317 struct GTY(()) c_common_identifier {
 318   struct tree_common common;
 319   struct cpp_hashnode node;
 320 };
 321
 322 /* An entry in the reserved keyword table.  */
 323
 324 struct c_common_resword
 325 {
 326   const char *const word;
 327   ENUM_BITFIELD(rid) const rid : 16;
 328   const unsigned int disable   : 16;
 329 };
 330
 331 /* Extra cpp_ttype values for C++.  */
 332
 333 /* A token type for keywords, as opposed to ordinary identifiers.  */
 334 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
 335
 336 /* A token type for template-ids.  If a template-id is processed while
 337    parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
 338    the value of the CPP_TEMPLATE_ID is whatever was returned by
 339    cp_parser_template_id.  */
 340 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
 341
 342 /* A token type for nested-name-specifiers.  If a
 343    nested-name-specifier is processed while parsing tentatively, it is
 344    replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
 345    CPP_NESTED_NAME_SPECIFIER is whatever was returned by
 346    cp_parser_nested_name_specifier_opt.  */
 347 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
 348
 349 /* A token type for pre-parsed C++0x decltype.  */
 350 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
 351
 352 /* The number of token types, including C++-specific ones.  */
 353 #define N_CP_TTYPES ((int) (CPP_DECLTYPE + 1))
 354
 355 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 356    mask) is _true_.  Thus for keywords which are present in all
 357    languages the disable field is zero.  */
 358
 359 #define D_CONLY         0x001   /* C only (not in C++).  */
 360 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 361 #define D_C99           0x004   /* In C, C99 only.  */
 362 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 363 #define D_EXT           0x010   /* GCC extension.  */
 364 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 365 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 366 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 367 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 368 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 369
 370 /* The reserved keyword table.  */
 371 extern const struct c_common_resword c_common_reswords[];
 372
 373 /* The number of items in the reserved keyword table.  */
 374 extern const unsigned int num_c_common_reswords;
 375
 376 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 377 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 378 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 379 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 380 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 381 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 382 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 383 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 384 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 385 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 386 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 387
 388 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 389 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 390 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 391 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 392 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 393 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 394 #define c_uint16_type_node              c_global_trees[CTI_UINT16_TYPE]
 395 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 396 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 397 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 398 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 399 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 400 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 401 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 402 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 403 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 404 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 405 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 406 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 407 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 408 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 409 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 410 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 411 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 412 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 413 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 414 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 415
 416 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 417 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 418 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 419
 420 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 421 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 422 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 423 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 424 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 425 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 426 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 427
 428 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 429
 430 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 431 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 432 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 433 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 434
 435 /* A node for `((void) 0)'.  */
 436 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 437
 438 /* The node for C++ `__null'.  */
 439 #define null_node                       c_global_trees[CTI_NULL]
 440
 441 extern GTY(()) tree c_global_trees[CTI_MAX];
 442
 443 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 444    tree for size reasons.  */
 445 struct GTY((variable_size)) sorted_fields_type {
 446   int len;
 447   tree GTY((length ("%h.len"))) elts[1];
 448 };
 449
 450 /* Mark which labels are explicitly declared.
 451    These may be shadowed, and may be referenced from nested functions.  */
 452 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 453
 454 typedef enum c_language_kind
 455 {
 456   clk_c         = 0,            /* C90, C94 or C99 */
 457   clk_objc      = 1,            /* clk_c with ObjC features.  */
 458   clk_cxx       = 2,            /* ANSI/ISO C++ */
 459   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 460 }
 461 c_language_kind;
 462
 463 /* To test for a specific language use c_language, defined by each
 464    front end.  For "ObjC features" or "not C++" use the macros.  */
 465 extern c_language_kind c_language;
 466
 467 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 468 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 469
 470 /* The various name of operator that appears in error messages. */
 471 typedef enum ref_operator {
 472   /* NULL */
 473   RO_NULL,
 474   /* array indexing */
 475   RO_ARRAY_INDEXING,
 476   /* unary * */
 477   RO_UNARY_STAR,
 478   /* -> */
 479   RO_ARROW,
 480   /* implicit conversion */
 481   RO_IMPLICIT_CONVERSION,
 482   /* ->* */
 483   RO_ARROW_STAR
 484 } ref_operator;
 485
 486 /* Information about a statement tree.  */
 487
 488 struct GTY(()) stmt_tree_s {
 489   /* A stack of statement lists being collected.  */
 490   vec<tree, va_gc> *x_cur_stmt_list;
 491
 492   /* In C++, Nonzero if we should treat statements as full
 493      expressions.  In particular, this variable is non-zero if at the
 494      end of a statement we should destroy any temporaries created
 495      during that statement.  Similarly, if, at the end of a block, we
 496      should destroy any local variables in this block.  Normally, this
 497      variable is nonzero, since those are the normal semantics of
 498      C++.
 499
 500      This flag has no effect in C.  */
 501   int stmts_are_full_exprs_p;
 502 };
 503
 504 typedef struct stmt_tree_s *stmt_tree;
 505
 506 /* Global state pertinent to the current function.  Some C dialects
 507    extend this structure with additional fields.  */
 508
 509 struct GTY(()) c_language_function {
 510   /* While we are parsing the function, this contains information
 511      about the statement-tree that we are building.  */
 512   struct stmt_tree_s x_stmt_tree;
 513
 514   /* Vector of locally defined typedefs, for
 515      -Wunused-local-typedefs.  */
 516   vec<tree, va_gc> *local_typedefs;
 517 };
 518
 519 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
 520
 521 /* When building a statement-tree, this is the current statement list
 522    being collected.  */
 523 #define cur_stmt_list   (stmt_list_stack->last ())
 524
 525 #define building_stmt_list_p() (stmt_list_stack && !stmt_list_stack->is_empty())
 526
 527 /* Language-specific hooks.  */
 528
 529 /* If non-NULL, this function is called after a precompile header file
 530    is loaded.  */
 531 extern void (*lang_post_pch_load) (void);
 532
 533 extern void push_file_scope (void);
 534 extern void pop_file_scope (void);
 535 extern stmt_tree current_stmt_tree (void);
 536 extern tree push_stmt_list (void);
 537 extern tree pop_stmt_list (tree);
 538 extern tree add_stmt (tree);
 539 extern void push_cleanup (tree, tree, bool);
 540 extern tree pushdecl_top_level (tree);
 541 extern tree pushdecl (tree);
 542 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 543                                location_t, tree, tree);
 544 extern tree build_array_notation_expr (location_t, tree, tree, enum tree_code,
 545                                        location_t, tree, tree);
 546 extern tree build_array_notation_ref (location_t, tree, tree, tree, tree, tree);
 547 extern tree build_indirect_ref (location_t, tree, ref_operator);
 548
 549 extern int field_decl_cmp (const void *, const void *);
 550 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 551                                   void *);
 552 extern bool has_c_linkage (const_tree decl);
 553 \f
 554 /* Switches common to the C front ends.  */
 555
 556 /* Nonzero means don't output line number information.  */
 557
 558 extern char flag_no_line_commands;
 559
 560 /* Nonzero causes -E output not to be done, but directives such as
 561    #define that have side effects are still obeyed.  */
 562
 563 extern char flag_no_output;
 564
 565 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 566    'N' or 'U' of the command line switch.  */
 567
 568 extern char flag_dump_macros;
 569
 570 /* Nonzero means pass #include lines through to the output.  */
 571
 572 extern char flag_dump_includes;
 573
 574 /* Nonzero means process PCH files while preprocessing.  */
 575
 576 extern bool flag_pch_preprocess;
 577
 578 /* The file name to which we should write a precompiled header, or
 579    NULL if no header will be written in this compile.  */
 580
 581 extern const char *pch_file;
 582
 583 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 584    user's namespace.  */
 585
 586 extern int flag_iso;
 587
 588 /* C/ObjC language option variables.  */
 589
 590
 591 /* Nonzero means allow type mismatches in conditional expressions;
 592    just make their values `void'.  */
 593
 594 extern int flag_cond_mismatch;
 595
 596 /* Nonzero means enable C89 Amendment 1 features.  */
 597
 598 extern int flag_isoc94;
 599
 600 /* Nonzero means use the ISO C99 (or C11) dialect of C.  */
 601
 602 extern int flag_isoc99;
 603
 604 /* Nonzero means use the ISO C11 dialect of C.  */
 605
 606 extern int flag_isoc11;
 607
 608 /* Nonzero means that we have builtin functions, and main is an int.  */
 609
 610 extern int flag_hosted;
 611
 612 /* ObjC language option variables.  */
 613
 614
 615 /* Tells the compiler that this is a special run.  Do not perform any
 616    compiling, instead we are to test some platform dependent features
 617    and output a C header file with appropriate definitions.  */
 618
 619 extern int print_struct_values;
 620
 621 /* Tells the compiler what is the constant string class for ObjC.  */
 622
 623 extern const char *constant_string_class_name;
 624
 625
 626 /* C++ language option variables.  */
 627
 628
 629 /* Nonzero means generate separate instantiation control files and
 630    juggle them at link time.  */
 631
 632 extern int flag_use_repository;
 633
 634 /* The supported C++ dialects.  */
 635
 636 enum cxx_dialect {
 637   /* C++98 with TC1  */
 638   cxx98,
 639   cxx03 = cxx98,
 640   /* C++11  */
 641   cxx0x,
 642   cxx11 = cxx0x,
 643   /* C++1y (C++17?) */
 644   cxx1y
 645 };
 646
 647 /* The C++ dialect being used. C++98 is the default.  */
 648 extern enum cxx_dialect cxx_dialect;
 649
 650 /* Maximum template instantiation depth.  This limit is rather
 651    arbitrary, but it exists to limit the time it takes to notice
 652    excessively recursive template instantiations.  */
 653
 654 extern int max_tinst_depth;
 655
 656 /* Nonzero means that we should not issue warnings about problems that
 657    occur when the code is executed, because the code being processed
 658    is not expected to be executed.  This is set during parsing.  This
 659    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 660    not a bool, because unexecuted expressions can nest.  */
 661
 662 extern int c_inhibit_evaluation_warnings;
 663
 664 /* Whether lexing has been completed, so subsequent preprocessor
 665    errors should use the compiler's input_location.  */
 666
 667 extern bool done_lexing;
 668
 669 /* C types are partitioned into three subsets: object, function, and
 670    incomplete types.  */
 671 #define C_TYPE_OBJECT_P(type) \
 672   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 673
 674 #define C_TYPE_INCOMPLETE_P(type) \
 675   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 676
 677 #define C_TYPE_FUNCTION_P(type) \
 678   (TREE_CODE (type) == FUNCTION_TYPE)
 679
 680 /* For convenience we define a single macro to identify the class of
 681    object or incomplete types.  */
 682 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 683   (!C_TYPE_FUNCTION_P (type))
 684
 685 struct visibility_flags
 686 {
 687   unsigned inpragma : 1;        /* True when in #pragma GCC visibility.  */
 688   unsigned inlines_hidden : 1;  /* True when -finlineshidden in effect.  */
 689 };
 690
 691 /* These enumerators are possible types of unsafe conversions.
 692    SAFE_CONVERSION The conversion is safe
 693    UNSAFE_OTHER Another type of conversion with problems
 694    UNSAFE_SIGN Conversion between signed and unsigned integers
 695     which are all warned about immediately, so this is unused
 696    UNSAFE_REAL Conversions that reduce the precision of reals
 697     including conversions from reals to integers
 698  */
 699 enum conversion_safety { SAFE_CONVERSION = 0, UNSAFE_OTHER, UNSAFE_SIGN, UNSAFE_REAL };
 700
 701 /* Global visibility options.  */
 702 extern struct visibility_flags visibility_options;
 703
 704 /* Attribute table common to the C front ends.  */
 705 extern const struct attribute_spec c_common_attribute_table[];
 706 extern const struct attribute_spec c_common_format_attribute_table[];
 707
 708 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 709    ID is the identifier to use, NAME is the string.
 710    TYPE_DEP indicates whether it depends on type of the function or not
 711    (i.e. __PRETTY_FUNCTION__).  */
 712
 713 extern tree (*make_fname_decl) (location_t, tree, int);
 714
 715 /* In c-decl.c and cp/tree.c.  FIXME.  */
 716 extern void c_register_addr_space (const char *str, addr_space_t as);
 717
 718 /* In c-common.c.  */
 719 extern bool in_late_binary_op;
 720 extern const char *c_addr_space_name (addr_space_t as);
 721 extern tree identifier_global_value (tree);
 722 extern tree c_linkage_bindings (tree);
 723 extern void record_builtin_type (enum rid, const char *, tree);
 724 extern tree build_void_list_node (void);
 725 extern void start_fname_decls (void);
 726 extern void finish_fname_decls (void);
 727 extern const char *fname_as_string (int);
 728 extern tree fname_decl (location_t, unsigned, tree);
 729
 730 extern int check_user_alignment (const_tree, bool);
 731 extern void check_function_arguments (const_tree, int, tree *);
 732 extern void check_function_arguments_recurse (void (*)
 733                                               (void *, tree,
 734                                                unsigned HOST_WIDE_INT),
 735                                               void *, tree,
 736                                               unsigned HOST_WIDE_INT);
 737 extern bool check_builtin_function_arguments (tree, int, tree *);
 738 extern void check_function_format (tree, int, tree *);
 739 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 740 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 741 extern bool attribute_takes_identifier_p (const_tree);
 742 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
 743                                     const struct cl_option_handlers *);
 744 extern bool default_handle_c_option (size_t, const char *, int);
 745 extern tree c_common_type_for_mode (enum machine_mode, int);
 746 extern tree c_common_type_for_size (unsigned int, int);
 747 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 748                                                 int, int);
 749 extern tree c_common_unsigned_type (tree);
 750 extern tree c_common_signed_type (tree);
 751 extern tree c_common_signed_or_unsigned_type (int, tree);
 752 extern void c_common_init_ts (void);
 753 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 754 extern enum conversion_safety unsafe_conversion_p (tree, tree, bool);
 755 extern bool decl_with_nonnull_addr_p (const_tree);
 756 extern tree c_fully_fold (tree, bool, bool *);
 757 extern tree decl_constant_value_for_optimization (tree);
 758 extern tree c_wrap_maybe_const (tree, bool);
 759 extern tree c_save_expr (tree);
 760 extern tree c_common_truthvalue_conversion (location_t, tree);
 761 extern void c_apply_type_quals_to_decl (int, tree);
 762 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 763 extern tree c_alignof_expr (location_t, tree);
 764 /* Print an error message for invalid operands to arith operation CODE.
 765    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 766 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 767 extern tree fix_string_type (tree);
 768 extern void constant_expression_warning (tree);
 769 extern void constant_expression_error (tree);
 770 extern bool strict_aliasing_warning (tree, tree, tree);
 771 extern void sizeof_pointer_memaccess_warning (location_t *, tree,
 772                                               vec<tree, va_gc> *, tree *,
 773                                               bool (*) (tree, tree));
 774 extern void warnings_for_convert_and_check (tree, tree, tree);
 775 extern tree convert_and_check (tree, tree);
 776 extern void overflow_warning (location_t, tree);
 777 extern bool warn_if_unused_value (const_tree, location_t);
 778 extern void warn_logical_operator (location_t, enum tree_code, tree,
 779                                    enum tree_code, tree, enum tree_code, tree);
 780 extern void check_main_parameter_types (tree decl);
 781 extern bool c_determine_visibility (tree);
 782 extern bool vector_types_compatible_elements_p (tree, tree);
 783 extern void mark_valid_location_for_stdc_pragma (bool);
 784 extern bool valid_location_for_stdc_pragma_p (void);
 785 extern void set_float_const_decimal64 (void);
 786 extern void clear_float_const_decimal64 (void);
 787 extern bool float_const_decimal64_p (void);
 788
 789 extern bool keyword_begins_type_specifier (enum rid);
 790 extern bool keyword_is_storage_class_specifier (enum rid);
 791 extern bool keyword_is_type_qualifier (enum rid);
 792 extern bool keyword_is_decl_specifier (enum rid);
 793 extern bool cxx_fundamental_alignment_p (unsigned);
 794
 795 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 796 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
 797
 798 /* Subroutine of build_binary_op, used for certain operations.  */
 799 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 800
 801 /* Subroutine of build_binary_op, used for comparison operations.
 802    See if the operands have both been converted from subword integer types
 803    and, if so, perhaps change them both back to their original type.  */
 804 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 805
 806 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree,
 807                              bool = true);
 808
 809 /* Add qualifiers to a type, in the fashion for C.  */
 810 extern tree c_build_qualified_type (tree, int);
 811
 812 /* Build tree nodes and builtin functions common to both C and C++ language
 813    frontends.  */
 814 extern void c_common_nodes_and_builtins (void);
 815
 816 extern void disable_builtin_function (const char *);
 817
 818 extern void set_compound_literal_name (tree decl);
 819
 820 extern tree build_va_arg (location_t, tree, tree);
 821
 822 extern const unsigned int c_family_lang_mask;
 823 extern unsigned int c_common_option_lang_mask (void);
 824 extern void c_common_initialize_diagnostics (diagnostic_context *);
 825 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
 826 extern void c_common_init_options_struct (struct gcc_options *);
 827 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
 828 extern bool c_common_post_options (const char **);
 829 extern bool c_common_init (void);
 830 extern void c_common_finish (void);
 831 extern void c_common_parse_file (void);
 832 extern alias_set_type c_common_get_alias_set (tree);
 833 extern void c_register_builtin_type (tree, const char*);
 834 extern bool c_promoting_integer_type_p (const_tree);
 835 extern int self_promoting_args_p (const_tree);
 836 extern tree strip_pointer_operator (tree);
 837 extern tree strip_pointer_or_array_types (tree);
 838 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 839
 840 /* This is the basic parsing function.  */
 841 extern void c_parse_file (void);
 842
 843 extern void warn_for_omitted_condop (location_t, tree);
 844
 845 /* These macros provide convenient access to the various _STMT nodes.  */
 846
 847 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 848    if a statement expression.  */
 849 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 850   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 851
 852 /* Nonzero if a label has been added to the statement list.  */
 853 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 854   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 855
 856 /* C_MAYBE_CONST_EXPR accessors.  */
 857 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 858   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 859 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 860   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 861 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 862   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 863 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 864   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 865 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 866   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 867    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 868        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 869            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 870
 871 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 872 #define DECL_C_BIT_FIELD(NODE) \
 873   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 874 #define SET_DECL_C_BIT_FIELD(NODE) \
 875   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 876 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 877   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 878
 879 extern tree do_case (location_t, tree, tree);
 880 extern tree build_stmt (location_t, enum tree_code, ...);
 881 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
 882
 883 /* These functions must be defined by each front-end which implements
 884    a variant of the C language.  They are used in c-common.c.  */
 885
 886 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 887 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 888 extern tree perform_integral_promotions (tree);
 889
 890 /* These functions must be defined by each front-end which implements
 891    a variant of the C language.  They are used by port files.  */
 892
 893 extern tree default_conversion (tree);
 894
 895 /* Given two integer or real types, return the type for their sum.
 896    Given two compatible ANSI C types, returns the merged type.  */
 897
 898 extern tree common_type (tree, tree);
 899
 900 extern tree decl_constant_value (tree);
 901
 902 /* Handle increment and decrement of boolean types.  */
 903 extern tree boolean_increment (enum tree_code, tree);
 904
 905 extern int case_compare (splay_tree_key, splay_tree_key);
 906
 907 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 908
 909 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 910
 911 extern tree build_function_call (location_t, tree, tree);
 912
 913 extern tree build_function_call_vec (location_t, tree, vec<tree, va_gc> *,
 914                                      vec<tree, va_gc> *);
 915
 916 extern tree resolve_overloaded_builtin (location_t, tree, vec<tree, va_gc> *);
 917
 918 extern tree finish_label_address_expr (tree, location_t);
 919
 920 /* Same function prototype, but the C and C++ front ends have
 921    different implementations.  Used in c-common.c.  */
 922 extern tree lookup_label (tree);
 923 extern tree lookup_name (tree);
 924 extern bool lvalue_p (const_tree);
 925
 926 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 927 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 928 extern tree c_build_vec_perm_expr (location_t, tree, tree, tree, bool = true);
 929
 930 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 931
 932 extern void init_c_lex (void);
 933
 934 extern void c_cpp_builtins (cpp_reader *);
 935 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 936 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
 937                          const char *, va_list *)
 938      ATTRIBUTE_GCC_DIAG(6,0);
 939
 940 extern bool parse_optimize_options (tree, bool);
 941
 942 /* Positive if an implicit `extern "C"' scope has just been entered;
 943    negative if such a scope has just been exited.  */
 944 extern GTY(()) int pending_lang_change;
 945
 946 /* Information recorded about each file examined during compilation.  */
 947
 948 struct c_fileinfo
 949 {
 950   int time;     /* Time spent in the file.  */
 951
 952   /* Flags used only by C++.
 953      INTERFACE_ONLY nonzero means that we are in an "interface" section
 954      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
 955      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
 956      INTERFACE_ONLY is zero, it means that we are responsible for
 957      exporting definitions that others might need.  */
 958   short interface_only;
 959   short interface_unknown;
 960 };
 961
 962 struct c_fileinfo *get_fileinfo (const char *);
 963 extern void dump_time_statistics (void);
 964
 965 extern bool c_dump_tree (void *, tree);
 966
 967 extern void verify_sequence_points (tree);
 968
 969 extern tree fold_offsetof_1 (tree);
 970 extern tree fold_offsetof (tree);
 971
 972 /* Places where an lvalue, or modifiable lvalue, may be required.
 973    Used to select diagnostic messages in lvalue_error and
 974    readonly_error.  */
 975 enum lvalue_use {
 976   lv_assign,
 977   lv_increment,
 978   lv_decrement,
 979   lv_addressof,
 980   lv_asm
 981 };
 982
 983 extern void readonly_error (location_t, tree, enum lvalue_use);
 984 extern void lvalue_error (location_t, enum lvalue_use);
 985 extern void invalid_indirection_error (location_t, tree, ref_operator);
 986
 987 extern int complete_array_type (tree *, tree, bool);
 988
 989 extern tree builtin_type_for_size (int, bool);
 990
 991 extern void c_common_mark_addressable_vec (tree);
 992
 993 extern void warn_array_subscript_with_type_char (tree);
 994 extern void warn_about_parentheses (location_t,
 995                                     enum tree_code,
 996                                     enum tree_code, tree,
 997                                     enum tree_code, tree);
 998 extern void warn_for_unused_label (tree label);
 999 extern void warn_for_div_by_zero (location_t, tree divisor);
1000 extern void warn_for_sign_compare (location_t,
1001                                    tree orig_op0, tree orig_op1,
1002                                    tree op0, tree op1,
1003                                    tree result_type,
1004                                    enum tree_code resultcode);
1005 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1006                                       location_t);
1007 extern void set_underlying_type (tree);
1008 extern void record_locally_defined_typedef (tree);
1009 extern void maybe_record_typedef_use (tree);
1010 extern void maybe_warn_unused_local_typedefs (void);
1011 extern vec<tree, va_gc> *make_tree_vector (void);
1012 extern void release_tree_vector (vec<tree, va_gc> *);
1013 extern vec<tree, va_gc> *make_tree_vector_single (tree);
1014 extern vec<tree, va_gc> *make_tree_vector_from_list (tree);
1015 extern vec<tree, va_gc> *make_tree_vector_copy (const vec<tree, va_gc> *);
1016
1017 /* In c-gimplify.c  */
1018 extern void c_genericize (tree);
1019 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1020 extern tree c_build_bind_expr (location_t, tree, tree);
1021
1022 /* In c-pch.c  */
1023 extern void pch_init (void);
1024 extern void pch_cpp_save_state (void);
1025 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1026 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1027                                const char *orig);
1028 extern void c_common_write_pch (void);
1029 extern void c_common_no_more_pch (void);
1030 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1031
1032 /* In *-checksum.c */
1033 extern const unsigned char executable_checksum[16];
1034
1035 /* In c-cppbuiltin.c  */
1036 extern void builtin_define_std (const char *macro);
1037 extern void builtin_define_with_value (const char *, const char *, int);
1038 extern void c_stddef_cpp_builtins (void);
1039 extern void fe_file_change (const struct line_map *);
1040 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1041
1042 /* In c-ppoutput.c  */
1043 extern void init_pp_output (FILE *);
1044 extern void preprocess_file (cpp_reader *);
1045 extern void pp_file_change (const struct line_map *);
1046 extern void pp_dir_change (cpp_reader *, const char *);
1047 extern bool check_missing_format_attribute (tree, tree);
1048
1049 /* In c-omp.c  */
1050 #if HOST_BITS_PER_WIDE_INT >= 64
1051 typedef unsigned HOST_WIDE_INT omp_clause_mask;
1052 # define OMP_CLAUSE_MASK_1 ((omp_clause_mask) 1)
1053 #else
1054 struct omp_clause_mask
1055 {
1056   inline omp_clause_mask ();
1057   inline omp_clause_mask (unsigned HOST_WIDE_INT l);
1058   inline omp_clause_mask (unsigned HOST_WIDE_INT l,
1059                           unsigned HOST_WIDE_INT h);
1060   inline omp_clause_mask &operator &= (omp_clause_mask);
1061   inline omp_clause_mask &operator |= (omp_clause_mask);
1062   inline omp_clause_mask operator ~ () const;
1063   inline omp_clause_mask operator & (omp_clause_mask) const;
1064   inline omp_clause_mask operator | (omp_clause_mask) const;
1065   inline omp_clause_mask operator >> (int);
1066   inline omp_clause_mask operator << (int);
1067   inline bool operator == (omp_clause_mask) const;
1068   inline bool operator != (omp_clause_mask) const;
1069   unsigned HOST_WIDE_INT low, high;
1070 };
1071
1072 inline
1073 omp_clause_mask::omp_clause_mask ()
1074 {
1075 }
1076
1077 inline
1078 omp_clause_mask::omp_clause_mask (unsigned HOST_WIDE_INT l)
1079 : low (l), high (0)
1080 {
1081 }
1082
1083 inline
1084 omp_clause_mask::omp_clause_mask (unsigned HOST_WIDE_INT l,
1085                                   unsigned HOST_WIDE_INT h)
1086 : low (l), high (h)
1087 {
1088 }
1089
1090 inline omp_clause_mask &
1091 omp_clause_mask::operator &= (omp_clause_mask b)
1092 {
1093   low &= b.low;
1094   high &= b.high;
1095   return *this;
1096 }
1097
1098 inline omp_clause_mask &
1099 omp_clause_mask::operator |= (omp_clause_mask b)
1100 {
1101   low |= b.low;
1102   high |= b.high;
1103   return *this;
1104 }
1105
1106 inline omp_clause_mask
1107 omp_clause_mask::operator ~ () const
1108 {
1109   omp_clause_mask ret (~low, ~high);
1110   return ret;
1111 }
1112
1113 inline omp_clause_mask
1114 omp_clause_mask::operator | (omp_clause_mask b) const
1115 {
1116   omp_clause_mask ret (low | b.low, high | b.high);
1117   return ret;
1118 }
1119
1120 inline omp_clause_mask
1121 omp_clause_mask::operator & (omp_clause_mask b) const
1122 {
1123   omp_clause_mask ret (low & b.low, high & b.high);
1124   return ret;
1125 }
1126
1127 inline omp_clause_mask
1128 omp_clause_mask::operator << (int amount)
1129 {
1130   omp_clause_mask ret;
1131   if (amount >= HOST_BITS_PER_WIDE_INT)
1132     {
1133       ret.low = 0;
1134       ret.high = low << (amount - HOST_BITS_PER_WIDE_INT);
1135     }
1136   else if (amount == 0)
1137     ret = *this;
1138   else
1139     {
1140       ret.low = low << amount;
1141       ret.high = (low >> (HOST_BITS_PER_WIDE_INT - amount))
1142                  | (high << amount);
1143     }
1144   return ret;
1145 }
1146
1147 inline omp_clause_mask
1148 omp_clause_mask::operator >> (int amount)
1149 {
1150   omp_clause_mask ret;
1151   if (amount >= HOST_BITS_PER_WIDE_INT)
1152     {
1153       ret.low = high >> (amount - HOST_BITS_PER_WIDE_INT);
1154       ret.high = 0;
1155     }
1156   else if (amount == 0)
1157     ret = *this;
1158   else
1159     {
1160       ret.low = (high << (HOST_BITS_PER_WIDE_INT - amount))
1161                  | (low >> amount);
1162       ret.high = high >> amount;
1163     }
1164   return ret;
1165 }
1166
1167 inline bool
1168 omp_clause_mask::operator == (omp_clause_mask b) const
1169 {
1170   return low == b.low && high == b.high;
1171 }
1172
1173 inline bool
1174 omp_clause_mask::operator != (omp_clause_mask b) const
1175 {
1176   return low != b.low || high != b.high;
1177 }
1178
1179 # define OMP_CLAUSE_MASK_1 omp_clause_mask (1)
1180 #endif
1181
1182 enum c_omp_clause_split
1183 {
1184   C_OMP_CLAUSE_SPLIT_TARGET = 0,
1185   C_OMP_CLAUSE_SPLIT_TEAMS,
1186   C_OMP_CLAUSE_SPLIT_DISTRIBUTE,
1187   C_OMP_CLAUSE_SPLIT_PARALLEL,
1188   C_OMP_CLAUSE_SPLIT_FOR,
1189   C_OMP_CLAUSE_SPLIT_SIMD,
1190   C_OMP_CLAUSE_SPLIT_COUNT,
1191   C_OMP_CLAUSE_SPLIT_SECTIONS = C_OMP_CLAUSE_SPLIT_FOR
1192 };
1193
1194 extern tree c_finish_omp_master (location_t, tree);
1195 extern tree c_finish_omp_taskgroup (location_t, tree);
1196 extern tree c_finish_omp_critical (location_t, tree, tree);
1197 extern tree c_finish_omp_ordered (location_t, tree);
1198 extern void c_finish_omp_barrier (location_t);
1199 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1200                                  tree, tree, tree, tree, tree, bool, bool);
1201 extern void c_finish_omp_flush (location_t);
1202 extern void c_finish_omp_taskwait (location_t);
1203 extern void c_finish_omp_taskyield (location_t);
1204 extern tree c_finish_omp_for (location_t, enum tree_code, tree, tree, tree,
1205                               tree, tree, tree);
1206 extern void c_omp_split_clauses (location_t, enum tree_code, omp_clause_mask,
1207                                  tree, tree *);
1208 extern tree c_omp_declare_simd_clauses_to_numbers (tree, tree);
1209 extern void c_omp_declare_simd_clauses_to_decls (tree, tree);
1210 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1211
1212 /* Not in c-omp.c; provided by the front end.  */
1213 extern bool c_omp_sharing_predetermined (tree);
1214 extern tree c_omp_remap_decl (tree, bool);
1215 extern void record_types_used_by_current_var_decl (tree);
1216
1217 /* Return next tree in the chain for chain_next walking of tree nodes.  */
1218 static inline tree
1219 c_tree_chain_next (tree t)
1220 {
1221   /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1222      kind of object, never a long chain of nodes.  Prefer
1223      TYPE_NEXT_VARIANT for types.  */
1224   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1225     return TYPE_NEXT_VARIANT (t);
1226   /* Otherwise, if there is TREE_CHAIN, return it.  */
1227   if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1228     return TREE_CHAIN (t);
1229   return NULL;
1230 }
1231
1232 /* Mask used by tm_stmt_attr.  */
1233 #define TM_STMT_ATTR_OUTER      2
1234 #define TM_STMT_ATTR_ATOMIC     4
1235 #define TM_STMT_ATTR_RELAXED    8
1236
1237 extern int parse_tm_stmt_attr (tree, int);
1238
1239 /* Mask used by tm_attr_to_mask and tm_mask_to_attr.  Note that these
1240    are ordered specifically such that more restrictive attributes are
1241    at lower bit positions.  This fact is known by the C++ tm attribute
1242    inheritance code such that least bit extraction (mask & -mask) results
1243    in the most restrictive attribute.  */
1244 #define TM_ATTR_SAFE                    1
1245 #define TM_ATTR_CALLABLE                2
1246 #define TM_ATTR_PURE                    4
1247 #define TM_ATTR_IRREVOCABLE             8
1248 #define TM_ATTR_MAY_CANCEL_OUTER        16
1249
1250 extern int tm_attr_to_mask (tree);
1251 extern tree tm_mask_to_attr (int);
1252 extern tree find_tm_attribute (tree);
1253
1254 /* A suffix-identifier value doublet that represents user-defined literals
1255    for C++-0x.  */
1256 enum overflow_type {
1257   OT_UNDERFLOW = -1,
1258   OT_NONE,
1259   OT_OVERFLOW
1260 };
1261
1262 struct GTY(()) tree_userdef_literal {
1263   struct tree_base base;
1264   tree suffix_id;
1265   tree value;
1266   tree num_string;
1267   enum overflow_type overflow;
1268 };
1269
1270 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1271   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1272
1273 #define USERDEF_LITERAL_VALUE(NODE) \
1274   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1275
1276 #define USERDEF_LITERAL_OVERFLOW(NODE) \
1277   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->overflow)
1278
1279 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1280   (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1281
1282 #define USERDEF_LITERAL_TYPE(NODE) \
1283   (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1284
1285 extern tree build_userdef_literal (tree suffix_id, tree value,
1286                                    enum overflow_type overflow,
1287                                    tree num_string);
1288
1289 extern void convert_vector_to_pointer_for_subscript (location_t, tree*, tree);
1290
1291 /* Possibe cases of scalar_to_vector conversion.  */
1292 enum stv_conv {
1293   stv_error,        /* Error occurred.  */
1294   stv_nothing,      /* Nothing happened.  */
1295   stv_firstarg,     /* First argument must be expanded.  */
1296   stv_secondarg     /* Second argument must be expanded.  */
1297 };
1298
1299 extern enum stv_conv scalar_to_vector (location_t loc, enum tree_code code,
1300                                        tree op0, tree op1, bool);
1301
1302 /* In c-cilkplus.c  */
1303 extern tree c_finish_cilk_clauses (tree);
1304 extern tree c_validate_cilk_plus_loop (tree *, int *, void *);
1305 extern bool c_check_cilk_loop (location_t, tree);
1306
1307 /* These #defines allow users to access different operands of the
1308    array notation tree.  */
1309
1310 #define ARRAY_NOTATION_CHECK(NODE) TREE_CHECK (NODE, ARRAY_NOTATION_REF)
1311 #define ARRAY_NOTATION_ARRAY(NODE) \
1312   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 0)
1313 #define ARRAY_NOTATION_START(NODE) \
1314   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 1)
1315 #define ARRAY_NOTATION_LENGTH(NODE) \
1316   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 2)
1317 #define ARRAY_NOTATION_STRIDE(NODE) \
1318   TREE_OPERAND (ARRAY_NOTATION_CHECK (NODE), 3)
1319
1320 /* This structure holds all the scalar values and its appropriate variable
1321    replacment.  It is mainly used by the function that pulls all the invariant
1322    parts that should be executed only once, which comes with array notation
1323    expressions.  */
1324 struct inv_list
1325 {
1326   vec<tree, va_gc> *list_values;
1327   vec<tree, va_gc> *replacement;
1328   vec<enum tree_code, va_gc> *additional_tcodes;
1329 };
1330
1331 /* This structure holds all the important components that can be extracted
1332    from an ARRAY_NOTATION_REF expression.  It is used to pass array notation
1333    information between the functions that are responsible for expansion.  */
1334 typedef struct cilkplus_an_parts
1335 {
1336   tree value;
1337   tree start;
1338   tree length;
1339   tree stride;
1340   bool is_vector;
1341 } an_parts;
1342
1343 /* This structure holds the components necessary to create the loop around
1344    the ARRAY_REF that is created using the ARRAY_NOTATION information.  */
1345
1346 typedef struct cilkplus_an_loop_parts
1347 {
1348   tree var;         /* Loop induction variable.  */
1349   tree incr;        /* Loop increment/decrement expression.  */
1350   tree cmp;         /* Loop condition.  */
1351   tree ind_init;    /* Initialization of the loop induction variable.  */
1352 } an_loop_parts;
1353
1354 /* In array-notation-common.c.  */
1355 extern HOST_WIDE_INT extract_sec_implicit_index_arg (location_t, tree);
1356 extern bool is_sec_implicit_index_fn (tree);
1357 extern void array_notation_init_builtins (void);
1358 extern struct c_expr fix_array_notation_expr (location_t, enum tree_code,
1359                                               struct c_expr);
1360 extern bool contains_array_notation_expr (tree);
1361 extern tree expand_array_notation_exprs (tree);
1362 extern tree fix_conditional_array_notations (tree);
1363 extern tree find_correct_array_notation_type (tree);
1364 extern bool length_mismatch_in_expr_p (location_t, vec<vec<an_parts> >);
1365 extern enum built_in_function is_cilkplus_reduce_builtin (tree);
1366 extern bool find_rank (location_t, tree, tree, bool, size_t *);
1367 extern void extract_array_notation_exprs (tree, bool, vec<tree, va_gc> **);
1368 extern void replace_array_notations (tree *, bool, vec<tree, va_gc> *,
1369                                      vec<tree, va_gc> *);
1370 extern tree find_inv_trees (tree *, int *, void *);
1371 extern tree replace_inv_trees (tree *, int *, void *);
1372 extern tree find_correct_array_notation_type (tree op);
1373 extern void cilkplus_extract_an_triplets (vec<tree, va_gc> *, size_t, size_t,
1374                                           vec<vec<an_parts> > *);
1375 extern vec <tree, va_gc> *fix_sec_implicit_args
1376   (location_t, vec <tree, va_gc> *, vec<an_loop_parts>, size_t, tree);
1377
1378 /* In cilk.c.  */
1379 extern tree insert_cilk_frame (tree);
1380 extern void cilk_init_builtins (void);
1381 extern int gimplify_cilk_spawn (tree *, gimple_seq *, gimple_seq *);
1382 extern void c_cilk_install_body_w_frame_cleanup (tree, tree);
1383 extern bool cilk_detect_spawn_and_unwrap (tree *);
1384 extern bool cilk_set_spawn_marker (location_t, tree);
1385 extern tree build_cilk_sync (void);
1386 extern tree build_cilk_spawn (location_t, tree);
1387 extern tree make_cilk_frame (tree);
1388 extern tree create_cilk_function_exit (tree, bool, bool);
1389 extern tree cilk_install_body_pedigree_operations (tree);
1390
1391 #endif /* ! GCC_C_COMMON_H */