gcc/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
   3    1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef GCC_C_COMMON_H
  23 #define GCC_C_COMMON_H
  24
  25 #include "splay-tree.h"
  26 #include "cpplib.h"
  27 #include "ggc.h"
  28
  29 /* Usage of TREE_LANG_FLAG_?:
  30    0: TREE_NEGATED_INT (in INTEGER_CST).
  31       IDENTIFIER_MARKED (used by search routines).
  32       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  33       C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
  34    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  35       STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
  36       C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
  37    2: unused
  38    3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
  39    4: unused
  40 */
  41
  42 /* Reserved identifiers.  This is the union of all the keywords for C,
  43    C++, and Objective-C.  All the type modifiers have to be in one
  44    block at the beginning, because they are used as mask bits.  There
  45    are 27 type modifiers; if we add many more we will have to redesign
  46    the mask mechanism.  */
  47
  48 enum rid
  49 {
  50   /* Modifiers: */
  51   /* C, in empirical order of frequency.  */
  52   RID_STATIC = 0,
  53   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  54   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  55   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  56
  57   /* C extensions */
  58   RID_COMPLEX, RID_THREAD, RID_SAT,
  59
  60   /* C++ */
  61   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  62
  63   /* ObjC */
  64   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  65
  66   /* C (reserved and imaginary types not implemented, so any use is a
  67      syntax error) */
  68   RID_IMAGINARY,
  69
  70   /* C */
  71   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  72   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  73   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  74   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  75   RID_SIZEOF,
  76
  77   /* C extensions */
  78   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
  79   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
  80   RID_TYPES_COMPATIBLE_P,
  81   RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
  82   RID_FRACT, RID_ACCUM,
  83
  84   /* This means to warn that this is a C++ keyword, and then treat it
  85      as a normal identifier.  */
  86   RID_CXX_COMPAT_WARN,
  87
  88   /* Too many ways of getting the name of a function as a string */
  89   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
  90
  91   /* C++ */
  92   RID_BOOL,     RID_WCHAR,    RID_CLASS,
  93   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
  94   RID_TEMPLATE, RID_NULL,     RID_CATCH,
  95   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
  96   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
  97   RID_THIS,     RID_THROW,    RID_TRUE,
  98   RID_TRY,      RID_TYPENAME, RID_TYPEID,
  99   RID_USING,    RID_CHAR16,   RID_CHAR32,
 100
 101   /* casts */
 102   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 103
 104   /* C++ extensions */
 105   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 106   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 107   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 108   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 109   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 110   RID_IS_CONVERTIBLE_TO,       RID_IS_CLASS,
 111   RID_IS_EMPTY,                RID_IS_ENUM,
 112   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 113   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 114   RID_IS_UNION,
 115
 116   /* C++0x */
 117   RID_STATIC_ASSERT, RID_CONSTEXPR, RID_DECLTYPE,
 118
 119   /* Objective-C */
 120   RID_AT_ENCODE,   RID_AT_END,
 121   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 122   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 123   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 124   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 125   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 126   RID_AT_INTERFACE,
 127   RID_AT_IMPLEMENTATION,
 128
 129   /* Named address support, mapping the keyword to a particular named address
 130      number.  Named address space 0 is reserved for the generic address.  If
 131      there are more than 254 named addresses, the addr_space_t type will need
 132      to be grown from an unsigned char to unsigned short.  */
 133   RID_ADDR_SPACE_0,             /* generic address */
 134   RID_ADDR_SPACE_1,
 135   RID_ADDR_SPACE_2,
 136   RID_ADDR_SPACE_3,
 137   RID_ADDR_SPACE_4,
 138   RID_ADDR_SPACE_5,
 139   RID_ADDR_SPACE_6,
 140   RID_ADDR_SPACE_7,
 141   RID_ADDR_SPACE_8,
 142   RID_ADDR_SPACE_9,
 143   RID_ADDR_SPACE_10,
 144   RID_ADDR_SPACE_11,
 145   RID_ADDR_SPACE_12,
 146   RID_ADDR_SPACE_13,
 147   RID_ADDR_SPACE_14,
 148   RID_ADDR_SPACE_15,
 149
 150   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 151   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 152
 153   RID_MAX,
 154
 155   RID_FIRST_MODIFIER = RID_STATIC,
 156   RID_LAST_MODIFIER = RID_ONEWAY,
 157
 158   RID_FIRST_CXX0X = RID_STATIC_ASSERT,
 159   RID_LAST_CXX0X = RID_DECLTYPE,
 160   RID_FIRST_AT = RID_AT_ENCODE,
 161   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 162   RID_FIRST_PQ = RID_IN,
 163   RID_LAST_PQ = RID_ONEWAY
 164 };
 165
 166 #define OBJC_IS_AT_KEYWORD(rid) \
 167   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 168    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 169
 170 #define OBJC_IS_PQ_KEYWORD(rid) \
 171   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 172    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 173
 174 /* The elements of `ridpointers' are identifier nodes for the reserved
 175    type names and storage classes.  It is indexed by a RID_... value.  */
 176 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 177
 178 /* Standard named or nameless data types of the C compiler.  */
 179
 180 enum c_tree_index
 181 {
 182     CTI_CHAR16_TYPE,
 183     CTI_CHAR32_TYPE,
 184     CTI_WCHAR_TYPE,
 185     CTI_UNDERLYING_WCHAR_TYPE,
 186     CTI_WINT_TYPE,
 187     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 188     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 189     CTI_INTMAX_TYPE,
 190     CTI_UINTMAX_TYPE,
 191     CTI_WIDEST_INT_LIT_TYPE,
 192     CTI_WIDEST_UINT_LIT_TYPE,
 193
 194     /* Types for <stdint.h>, that may not be defined on all
 195        targets.  */
 196     CTI_SIG_ATOMIC_TYPE,
 197     CTI_INT8_TYPE,
 198     CTI_INT16_TYPE,
 199     CTI_INT32_TYPE,
 200     CTI_INT64_TYPE,
 201     CTI_UINT8_TYPE,
 202     CTI_UINT16_TYPE,
 203     CTI_UINT32_TYPE,
 204     CTI_UINT64_TYPE,
 205     CTI_INT_LEAST8_TYPE,
 206     CTI_INT_LEAST16_TYPE,
 207     CTI_INT_LEAST32_TYPE,
 208     CTI_INT_LEAST64_TYPE,
 209     CTI_UINT_LEAST8_TYPE,
 210     CTI_UINT_LEAST16_TYPE,
 211     CTI_UINT_LEAST32_TYPE,
 212     CTI_UINT_LEAST64_TYPE,
 213     CTI_INT_FAST8_TYPE,
 214     CTI_INT_FAST16_TYPE,
 215     CTI_INT_FAST32_TYPE,
 216     CTI_INT_FAST64_TYPE,
 217     CTI_UINT_FAST8_TYPE,
 218     CTI_UINT_FAST16_TYPE,
 219     CTI_UINT_FAST32_TYPE,
 220     CTI_UINT_FAST64_TYPE,
 221     CTI_INTPTR_TYPE,
 222     CTI_UINTPTR_TYPE,
 223
 224     CTI_CHAR_ARRAY_TYPE,
 225     CTI_CHAR16_ARRAY_TYPE,
 226     CTI_CHAR32_ARRAY_TYPE,
 227     CTI_WCHAR_ARRAY_TYPE,
 228     CTI_INT_ARRAY_TYPE,
 229     CTI_STRING_TYPE,
 230     CTI_CONST_STRING_TYPE,
 231
 232     /* Type for boolean expressions (bool in C++, int in C).  */
 233     CTI_TRUTHVALUE_TYPE,
 234     CTI_TRUTHVALUE_TRUE,
 235     CTI_TRUTHVALUE_FALSE,
 236
 237     CTI_DEFAULT_FUNCTION_TYPE,
 238
 239     /* These are not types, but we have to look them up all the time.  */
 240     CTI_FUNCTION_NAME_DECL,
 241     CTI_PRETTY_FUNCTION_NAME_DECL,
 242     CTI_C99_FUNCTION_NAME_DECL,
 243     CTI_SAVED_FUNCTION_NAME_DECLS,
 244
 245     CTI_VOID_ZERO,
 246
 247     CTI_NULL,
 248
 249     CTI_MAX
 250 };
 251
 252 #define C_CPP_HASHNODE(id) \
 253   (&(((struct c_common_identifier *) (id))->node))
 254 #define C_RID_CODE(id) \
 255   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 256 #define C_SET_RID_CODE(id, code) \
 257   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 258
 259 /* Identifier part common to the C front ends.  Inherits from
 260    tree_identifier, despite appearances.  */
 261 struct GTY(()) c_common_identifier {
 262   struct tree_common common;
 263   struct cpp_hashnode node;
 264 };
 265
 266 /* An entry in the reserved keyword table.  */
 267
 268 struct c_common_resword
 269 {
 270   const char *const word;
 271   ENUM_BITFIELD(rid) const rid : 16;
 272   const unsigned int disable   : 16;
 273 };
 274
 275 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 276    mask) is _true_.  Thus for keywords which are present in all
 277    languages the disable field is zero.  */
 278
 279 #define D_CONLY         0x001   /* C only (not in C++).  */
 280 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 281 #define D_C99           0x004   /* In C, C99 only.  */
 282 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 283 #define D_EXT           0x010   /* GCC extension.  */
 284 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 285 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 286 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 287 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 288 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 289
 290 /* Macro for backends to define named address keywords.  */
 291 #define ADDR_SPACE_KEYWORD(STRING, VALUE) \
 292   { STRING, RID_FIRST_ADDR_SPACE + (VALUE), D_CONLY | D_EXT }
 293
 294 /* The reserved keyword table.  */
 295 extern const struct c_common_resword c_common_reswords[];
 296
 297 /* The number of items in the reserved keyword table.  */
 298 extern const unsigned int num_c_common_reswords;
 299
 300 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 301 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 302 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 303 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 304 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 305 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 306 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 307 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 308 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 309 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 310 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 311
 312 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 313 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 314 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 315 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 316 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 317 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 318 #define uint16_type_node                c_global_trees[CTI_UINT16_TYPE]
 319 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 320 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 321 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 322 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 323 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 324 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 325 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 326 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 327 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 328 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 329 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 330 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 331 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 332 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 333 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 334 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 335 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 336 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 337 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 338 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 339
 340 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 341 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 342 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 343
 344 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 345 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 346 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 347 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 348 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 349 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 350 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 351
 352 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 353
 354 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 355 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 356 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 357 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 358
 359 /* A node for `((void) 0)'.  */
 360 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 361
 362 /* The node for C++ `__null'.  */
 363 #define null_node                       c_global_trees[CTI_NULL]
 364
 365 extern GTY(()) tree c_global_trees[CTI_MAX];
 366
 367 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 368    tree for size reasons.  */
 369 struct GTY(()) sorted_fields_type {
 370   int len;
 371   tree GTY((length ("%h.len"))) elts[1];
 372 };
 373
 374 /* Mark which labels are explicitly declared.
 375    These may be shadowed, and may be referenced from nested functions.  */
 376 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 377
 378 typedef enum c_language_kind
 379 {
 380   clk_c         = 0,            /* C90, C94 or C99 */
 381   clk_objc      = 1,            /* clk_c with ObjC features.  */
 382   clk_cxx       = 2,            /* ANSI/ISO C++ */
 383   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 384 }
 385 c_language_kind;
 386
 387 /* To test for a specific language use c_language, defined by each
 388    front end.  For "ObjC features" or "not C++" use the macros.  */
 389 extern c_language_kind c_language;
 390
 391 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 392 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 393
 394 /* The various name of operator that appears in error messages. */
 395 typedef enum ref_operator {
 396   /* NULL */
 397   RO_NULL,
 398   /* array indexing */
 399   RO_ARRAY_INDEXING,
 400   /* unary * */
 401   RO_UNARY_STAR,
 402   /* -> */
 403   RO_ARROW,
 404   /* implicit conversion */
 405   RO_IMPLICIT_CONVERSION
 406 } ref_operator;
 407
 408 /* Information about a statement tree.  */
 409
 410 struct GTY(()) stmt_tree_s {
 411   /* The current statement list being collected.  */
 412   tree x_cur_stmt_list;
 413
 414   /* In C++, Nonzero if we should treat statements as full
 415      expressions.  In particular, this variable is no-zero if at the
 416      end of a statement we should destroy any temporaries created
 417      during that statement.  Similarly, if, at the end of a block, we
 418      should destroy any local variables in this block.  Normally, this
 419      variable is nonzero, since those are the normal semantics of
 420      C++.
 421
 422      However, in order to represent aggregate initialization code as
 423      tree structure, we use statement-expressions.  The statements
 424      within the statement expression should not result in cleanups
 425      being run until the entire enclosing statement is complete.
 426
 427      This flag has no effect in C.  */
 428   int stmts_are_full_exprs_p;
 429 };
 430
 431 typedef struct stmt_tree_s *stmt_tree;
 432
 433 /* Global state pertinent to the current function.  Some C dialects
 434    extend this structure with additional fields.  */
 435
 436 struct GTY(()) c_language_function {
 437   /* While we are parsing the function, this contains information
 438      about the statement-tree that we are building.  */
 439   struct stmt_tree_s x_stmt_tree;
 440 };
 441
 442 /* When building a statement-tree, this is the current statement list
 443    being collected.  It's TREE_CHAIN is a back-pointer to the previous
 444    statement list.  */
 445
 446 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
 447
 448 /* Language-specific hooks.  */
 449
 450 /* If non-NULL, this function is called after a precompile header file
 451    is loaded.  */
 452 extern void (*lang_post_pch_load) (void);
 453
 454 extern void push_file_scope (void);
 455 extern void pop_file_scope (void);
 456 extern stmt_tree current_stmt_tree (void);
 457 extern tree push_stmt_list (void);
 458 extern tree pop_stmt_list (tree);
 459 extern tree add_stmt (tree);
 460 extern void push_cleanup (tree, tree, bool);
 461 extern tree pushdecl_top_level (tree);
 462 extern tree pushdecl (tree);
 463 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 464                                location_t, tree, tree);
 465 extern tree build_indirect_ref (location_t, tree, ref_operator);
 466
 467 extern int c_expand_decl (tree);
 468
 469 extern int field_decl_cmp (const void *, const void *);
 470 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 471                                   void *);
 472 extern bool has_c_linkage (const_tree decl);
 473 \f
 474 /* Switches common to the C front ends.  */
 475
 476 /* Nonzero if prepreprocessing only.  */
 477
 478 extern int flag_preprocess_only;
 479
 480 /* Zero means that faster, ...NonNil variants of objc_msgSend...
 481    calls will be used in ObjC; passing nil receivers to such calls
 482    will most likely result in crashes.  */
 483 extern int flag_nil_receivers;
 484
 485 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
 486    @try, etc.) in source code.  */
 487 extern int flag_objc_exceptions;
 488
 489 /* Nonzero means that we generate NeXT setjmp based exceptions.  */
 490 extern int flag_objc_sjlj_exceptions;
 491
 492 /* Nonzero means that code generation will be altered to support
 493    "zero-link" execution.  This currently affects ObjC only, but may
 494    affect other languages in the future.  */
 495 extern int flag_zero_link;
 496
 497 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
 498    unit.  It will inform the ObjC runtime that class definition(s) herein
 499    contained are to replace one(s) previously loaded.  */
 500 extern int flag_replace_objc_classes;
 501
 502 /* Nonzero means don't output line number information.  */
 503
 504 extern char flag_no_line_commands;
 505
 506 /* Nonzero causes -E output not to be done, but directives such as
 507    #define that have side effects are still obeyed.  */
 508
 509 extern char flag_no_output;
 510
 511 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 512    'N' or 'U' of the command line switch.  */
 513
 514 extern char flag_dump_macros;
 515
 516 /* Nonzero means pass #include lines through to the output.  */
 517
 518 extern char flag_dump_includes;
 519
 520 /* Nonzero means process PCH files while preprocessing.  */
 521
 522 extern bool flag_pch_preprocess;
 523
 524 /* The file name to which we should write a precompiled header, or
 525    NULL if no header will be written in this compile.  */
 526
 527 extern const char *pch_file;
 528
 529 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 530    user's namespace.  */
 531
 532 extern int flag_iso;
 533
 534 /* Nonzero if -undef was given.  It suppresses target built-in macros
 535    and assertions.  */
 536
 537 extern int flag_undef;
 538
 539 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 540
 541 extern int flag_no_builtin;
 542
 543 /* Nonzero means don't recognize the non-ANSI builtin functions.
 544    -ansi sets this.  */
 545
 546 extern int flag_no_nonansi_builtin;
 547
 548 /* Nonzero means give `double' the same size as `float'.  */
 549
 550 extern int flag_short_double;
 551
 552 /* Nonzero means give `wchar_t' the same size as `short'.  */
 553
 554 extern int flag_short_wchar;
 555
 556 /* Nonzero means allow implicit conversions between vectors with
 557    differing numbers of subparts and/or differing element types.  */
 558 extern int flag_lax_vector_conversions;
 559
 560 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 561 extern int flag_ms_extensions;
 562
 563 /* Nonzero means don't recognize the keyword `asm'.  */
 564
 565 extern int flag_no_asm;
 566
 567 /* Nonzero means give string constants the type `const char *', as mandated
 568    by the standard.  */
 569
 570 extern int flag_const_strings;
 571
 572 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 573
 574 extern int flag_signed_bitfields;
 575
 576 /* Warn about #pragma directives that are not recognized.  */
 577
 578 extern int warn_unknown_pragmas; /* Tri state variable.  */
 579
 580 /* Warn about format/argument anomalies in calls to formatted I/O functions
 581    (*printf, *scanf, strftime, strfmon, etc.).  */
 582
 583 extern int warn_format;
 584
 585
 586 /* C/ObjC language option variables.  */
 587
 588
 589 /* Nonzero means allow type mismatches in conditional expressions;
 590    just make their values `void'.  */
 591
 592 extern int flag_cond_mismatch;
 593
 594 /* Nonzero means enable C89 Amendment 1 features.  */
 595
 596 extern int flag_isoc94;
 597
 598 /* Nonzero means use the ISO C99 (or C1X) dialect of C.  */
 599
 600 extern int flag_isoc99;
 601
 602 /* Nonzero means use the ISO C1X dialect of C.  */
 603
 604 extern int flag_isoc1x;
 605
 606 /* Nonzero means that we have builtin functions, and main is an int.  */
 607
 608 extern int flag_hosted;
 609
 610 /* ObjC language option variables.  */
 611
 612
 613 /* Open and close the file for outputting class declarations, if
 614    requested (ObjC).  */
 615
 616 extern int flag_gen_declaration;
 617
 618 /* Tells the compiler that this is a special run.  Do not perform any
 619    compiling, instead we are to test some platform dependent features
 620    and output a C header file with appropriate definitions.  */
 621
 622 extern int print_struct_values;
 623
 624 /* ???.  Undocumented.  */
 625
 626 extern const char *constant_string_class_name;
 627
 628
 629 /* C++ language option variables.  */
 630
 631
 632 /* Nonzero means don't recognize any extension keywords.  */
 633
 634 extern int flag_no_gnu_keywords;
 635
 636 /* Nonzero means do emit exported implementations of functions even if
 637    they can be inlined.  */
 638
 639 extern int flag_implement_inlines;
 640
 641 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 642
 643 extern int flag_implicit_templates;
 644
 645 /* Nonzero means that implicit instantiations of inline templates will be
 646    emitted if needed, even if instantiations of non-inline templates
 647    aren't.  */
 648
 649 extern int flag_implicit_inline_templates;
 650
 651 /* Nonzero means generate separate instantiation control files and
 652    juggle them at link time.  */
 653
 654 extern int flag_use_repository;
 655
 656 /* Nonzero if we want to issue diagnostics that the standard says are not
 657    required.  */
 658
 659 extern int flag_optional_diags;
 660
 661 /* Nonzero means we should attempt to elide constructors when possible.  */
 662
 663 extern int flag_elide_constructors;
 664
 665 /* Nonzero means that member functions defined in class scope are
 666    inline by default.  */
 667
 668 extern int flag_default_inline;
 669
 670 /* Controls whether compiler generates 'type descriptor' that give
 671    run-time type information.  */
 672
 673 extern int flag_rtti;
 674
 675 /* Nonzero if we want to conserve space in the .o files.  We do this
 676    by putting uninitialized data and runtime initialized data into
 677    .common instead of .data at the expense of not flagging multiple
 678    definitions.  */
 679
 680 extern int flag_conserve_space;
 681
 682 /* Nonzero if we want to obey access control semantics.  */
 683
 684 extern int flag_access_control;
 685
 686 /* Nonzero if we want to check the return value of new and avoid calling
 687    constructors if it is a null pointer.  */
 688
 689 extern int flag_check_new;
 690
 691 /* The supported C++ dialects.  */
 692
 693 enum cxx_dialect {
 694   /* C++98  */
 695   cxx98,
 696   /* Experimental features that are likely to become part of
 697      C++0x.  */
 698   cxx0x
 699 };
 700
 701 /* The C++ dialect being used. C++98 is the default.  */
 702 extern enum cxx_dialect cxx_dialect;
 703
 704 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 705    initialization variables.
 706    0: Old rules, set by -fno-for-scope.
 707    2: New ISO rules, set by -ffor-scope.
 708    1: Try to implement new ISO rules, but with backup compatibility
 709    (and warnings).  This is the default, for now.  */
 710
 711 extern int flag_new_for_scope;
 712
 713 /* Nonzero if we want to emit defined symbols with common-like linkage as
 714    weak symbols where possible, in order to conform to C++ semantics.
 715    Otherwise, emit them as local symbols.  */
 716
 717 extern int flag_weak;
 718
 719 /* 0 means we want the preprocessor to not emit line directives for
 720    the current working directory.  1 means we want it to do it.  -1
 721    means we should decide depending on whether debugging information
 722    is being emitted or not.  */
 723
 724 extern int flag_working_directory;
 725
 726 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 727    destructors for local statics and global objects.  */
 728
 729 extern int flag_use_cxa_atexit;
 730
 731 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
 732    logic.  */
 733
 734 extern int flag_use_cxa_get_exception_ptr;
 735
 736 /* Nonzero means to implement standard semantics for exception
 737    specifications, calling unexpected if an exception is thrown that
 738    doesn't match the specification.  Zero means to treat them as
 739    assertions and optimize accordingly, but not check them.  */
 740
 741 extern int flag_enforce_eh_specs;
 742
 743 /* Nonzero (the default) means to generate thread-safe code for
 744    initializing local statics.  */
 745
 746 extern int flag_threadsafe_statics;
 747
 748 /* Nonzero if we want to pretty-print template specializations as the
 749    template signature followed by the arguments.  */
 750
 751 extern int flag_pretty_templates;
 752
 753 /* Nonzero means warn about implicit declarations.  */
 754
 755 extern int warn_implicit;
 756
 757 /* Warn about using __null (as NULL in C++) as sentinel.  For code compiled
 758    with GCC this doesn't matter as __null is guaranteed to have the right
 759    size.  */
 760
 761 extern int warn_strict_null_sentinel;
 762
 763 /* Maximum template instantiation depth.  This limit is rather
 764    arbitrary, but it exists to limit the time it takes to notice
 765    infinite template instantiations.  */
 766
 767 extern int max_tinst_depth;
 768
 769 /* Nonzero means that we should not issue warnings about problems that
 770    occur when the code is executed, because the code being processed
 771    is not expected to be executed.  This is set during parsing.  This
 772    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 773    not a bool, because unexecuted expressions can nest.  */
 774
 775 extern int c_inhibit_evaluation_warnings;
 776
 777 /* Whether lexing has been completed, so subsequent preprocessor
 778    errors should use the compiler's input_location.  */
 779
 780 extern bool done_lexing;
 781
 782 /* C types are partitioned into three subsets: object, function, and
 783    incomplete types.  */
 784 #define C_TYPE_OBJECT_P(type) \
 785   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 786
 787 #define C_TYPE_INCOMPLETE_P(type) \
 788   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 789
 790 #define C_TYPE_FUNCTION_P(type) \
 791   (TREE_CODE (type) == FUNCTION_TYPE)
 792
 793 /* For convenience we define a single macro to identify the class of
 794    object or incomplete types.  */
 795 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 796   (!C_TYPE_FUNCTION_P (type))
 797
 798 /* Attribute table common to the C front ends.  */
 799 extern const struct attribute_spec c_common_attribute_table[];
 800 extern const struct attribute_spec c_common_format_attribute_table[];
 801
 802 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 803    ID is the identifier to use, NAME is the string.
 804    TYPE_DEP indicates whether it depends on type of the function or not
 805    (i.e. __PRETTY_FUNCTION__).  */
 806
 807 extern tree (*make_fname_decl) (location_t, tree, int);
 808
 809 extern const char *c_addr_space_name (addr_space_t as);
 810 extern tree identifier_global_value (tree);
 811 extern void record_builtin_type (enum rid, const char *, tree);
 812 extern tree build_void_list_node (void);
 813 extern void start_fname_decls (void);
 814 extern void finish_fname_decls (void);
 815 extern const char *fname_as_string (int);
 816 extern tree fname_decl (location_t, unsigned, tree);
 817
 818 extern void check_function_arguments (tree, int, tree *, tree);
 819 extern void check_function_arguments_recurse (void (*)
 820                                               (void *, tree,
 821                                                unsigned HOST_WIDE_INT),
 822                                               void *, tree,
 823                                               unsigned HOST_WIDE_INT);
 824 extern bool check_builtin_function_arguments (tree, int, tree *);
 825 extern void check_function_format (tree, int, tree *);
 826 extern void set_Wformat (int);
 827 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 828 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 829 extern bool attribute_takes_identifier_p (tree);
 830 extern int c_common_handle_option (size_t code, const char *arg, int value);
 831 extern bool c_common_missing_argument (const char *opt, size_t code);
 832 extern tree c_common_type_for_mode (enum machine_mode, int);
 833 extern tree c_common_type_for_size (unsigned int, int);
 834 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 835                                                 int, int);
 836 extern tree c_common_unsigned_type (tree);
 837 extern tree c_common_signed_type (tree);
 838 extern tree c_common_signed_or_unsigned_type (int, tree);
 839 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 840 extern bool decl_with_nonnull_addr_p (const_tree);
 841 extern tree c_fully_fold (tree, bool, bool *);
 842 extern tree decl_constant_value_for_optimization (tree);
 843 extern tree c_wrap_maybe_const (tree, bool);
 844 extern tree c_save_expr (tree);
 845 extern tree c_common_truthvalue_conversion (location_t, tree);
 846 extern void c_apply_type_quals_to_decl (int, tree);
 847 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 848 extern tree c_alignof_expr (location_t, tree);
 849 /* Print an error message for invalid operands to arith operation CODE.
 850    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 851 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 852 extern tree fix_string_type (tree);
 853 extern void constant_expression_warning (tree);
 854 extern void constant_expression_error (tree);
 855 extern bool strict_aliasing_warning (tree, tree, tree);
 856 extern void warnings_for_convert_and_check (tree, tree, tree);
 857 extern tree convert_and_check (tree, tree);
 858 extern void overflow_warning (location_t, tree);
 859 extern void warn_logical_operator (location_t, enum tree_code, tree,
 860                                    enum tree_code, tree, enum tree_code, tree);
 861 extern void check_main_parameter_types (tree decl);
 862 extern bool c_determine_visibility (tree);
 863 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 864 extern void mark_valid_location_for_stdc_pragma (bool);
 865 extern bool valid_location_for_stdc_pragma_p (void);
 866 extern void set_float_const_decimal64 (void);
 867 extern void clear_float_const_decimal64 (void);
 868 extern bool float_const_decimal64_p (void);
 869
 870 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 871 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
 872
 873 /* Subroutine of build_binary_op, used for certain operations.  */
 874 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 875
 876 /* Subroutine of build_binary_op, used for comparison operations.
 877    See if the operands have both been converted from subword integer types
 878    and, if so, perhaps change them both back to their original type.  */
 879 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 880
 881 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
 882
 883 /* Add qualifiers to a type, in the fashion for C.  */
 884 extern tree c_build_qualified_type (tree, int);
 885
 886 /* Build tree nodes and builtin functions common to both C and C++ language
 887    frontends.  */
 888 extern void c_common_nodes_and_builtins (void);
 889
 890 extern void disable_builtin_function (const char *);
 891
 892 extern void set_compound_literal_name (tree decl);
 893
 894 extern tree build_va_arg (location_t, tree, tree);
 895
 896 extern unsigned int c_common_init_options (unsigned int, const char **);
 897 extern bool c_common_post_options (const char **);
 898 extern bool c_common_init (void);
 899 extern void c_common_finish (void);
 900 extern void c_common_parse_file (int);
 901 extern alias_set_type c_common_get_alias_set (tree);
 902 extern void c_register_builtin_type (tree, const char*);
 903 extern bool c_promoting_integer_type_p (const_tree);
 904 extern int self_promoting_args_p (const_tree);
 905 extern tree strip_pointer_operator (tree);
 906 extern tree strip_pointer_or_array_types (tree);
 907 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 908
 909 /* This is the basic parsing function.  */
 910 extern void c_parse_file (void);
 911 /* This is misnamed, it actually performs end-of-compilation processing.  */
 912 extern void finish_file (void);
 913
 914
 915 /* These macros provide convenient access to the various _STMT nodes.  */
 916
 917 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 918    if a statement expression.  */
 919 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 920   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 921
 922 /* Nonzero if a label has been added to the statement list.  */
 923 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 924   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 925
 926 /* C_MAYBE_CONST_EXPR accessors.  */
 927 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 928   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 929 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 930   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 931 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 932   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 933 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 934   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 935 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 936   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 937    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 938        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 939            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 940
 941 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 942 #define DECL_C_BIT_FIELD(NODE) \
 943   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 944 #define SET_DECL_C_BIT_FIELD(NODE) \
 945   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 946 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 947   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 948
 949 extern tree do_case (location_t, tree, tree);
 950 extern tree build_stmt (location_t, enum tree_code, ...);
 951 extern tree build_case_label (location_t, tree, tree, tree);
 952
 953 /* These functions must be defined by each front-end which implements
 954    a variant of the C language.  They are used in c-common.c.  */
 955
 956 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 957 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 958 extern tree perform_integral_promotions (tree);
 959
 960 /* These functions must be defined by each front-end which implements
 961    a variant of the C language.  They are used by port files.  */
 962
 963 extern tree default_conversion (tree);
 964
 965 /* Given two integer or real types, return the type for their sum.
 966    Given two compatible ANSI C types, returns the merged type.  */
 967
 968 extern tree common_type (tree, tree);
 969
 970 extern tree decl_constant_value (tree);
 971
 972 /* Handle increment and decrement of boolean types.  */
 973 extern tree boolean_increment (enum tree_code, tree);
 974
 975 extern int case_compare (splay_tree_key, splay_tree_key);
 976
 977 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 978
 979 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 980
 981 extern tree build_function_call (location_t, tree, tree);
 982
 983 extern tree build_function_call_vec (location_t, tree,
 984                                      VEC(tree,gc) *, VEC(tree,gc) *);
 985
 986 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
 987
 988 extern tree finish_label_address_expr (tree, location_t);
 989
 990 /* Same function prototype, but the C and C++ front ends have
 991    different implementations.  Used in c-common.c.  */
 992 extern tree lookup_label (tree);
 993 extern tree lookup_name (tree);
 994 extern bool lvalue_p (const_tree);
 995
 996 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 997 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 998
 999 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1000
1001 extern void init_c_lex (void);
1002
1003 extern void c_cpp_builtins (cpp_reader *);
1004 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
1005
1006 /* Positive if an implicit `extern "C"' scope has just been entered;
1007    negative if such a scope has just been exited.  */
1008 extern GTY(()) int pending_lang_change;
1009
1010 /* Information recorded about each file examined during compilation.  */
1011
1012 struct c_fileinfo
1013 {
1014   int time;     /* Time spent in the file.  */
1015
1016   /* Flags used only by C++.
1017      INTERFACE_ONLY nonzero means that we are in an "interface" section
1018      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
1019      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
1020      INTERFACE_ONLY is zero, it means that we are responsible for
1021      exporting definitions that others might need.  */
1022   short interface_only;
1023   short interface_unknown;
1024 };
1025
1026 struct c_fileinfo *get_fileinfo (const char *);
1027 extern void dump_time_statistics (void);
1028
1029 extern bool c_dump_tree (void *, tree);
1030
1031 extern void verify_sequence_points (tree);
1032
1033 extern tree fold_offsetof (tree, tree);
1034
1035 /* Places where an lvalue, or modifiable lvalue, may be required.
1036    Used to select diagnostic messages in lvalue_error and
1037    readonly_error.  */
1038 enum lvalue_use {
1039   lv_assign,
1040   lv_increment,
1041   lv_decrement,
1042   lv_addressof,
1043   lv_asm
1044 };
1045
1046 extern void lvalue_error (enum lvalue_use);
1047
1048 extern int complete_array_type (tree *, tree, bool);
1049
1050 extern tree builtin_type_for_size (int, bool);
1051
1052 extern void warn_array_subscript_with_type_char (tree);
1053 extern void warn_about_parentheses (enum tree_code,
1054                                     enum tree_code, tree,
1055                                     enum tree_code, tree);
1056 extern void warn_for_unused_label (tree label);
1057 extern void warn_for_div_by_zero (location_t, tree divisor);
1058 extern void warn_for_sign_compare (location_t,
1059                                    tree orig_op0, tree orig_op1,
1060                                    tree op0, tree op1,
1061                                    tree result_type,
1062                                    enum tree_code resultcode);
1063 extern void set_underlying_type (tree x);
1064 extern bool is_typedef_decl (tree x);
1065 extern VEC(tree,gc) *make_tree_vector (void);
1066 extern void release_tree_vector (VEC(tree,gc) *);
1067 extern VEC(tree,gc) *make_tree_vector_single (tree);
1068 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
1069
1070 /* In c-gimplify.c  */
1071 extern void c_genericize (tree);
1072 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1073 extern tree c_build_bind_expr (location_t, tree, tree);
1074
1075 /* In c-pch.c  */
1076 extern void pch_init (void);
1077 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1078 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1079                                const char *orig);
1080 extern void c_common_write_pch (void);
1081 extern void c_common_no_more_pch (void);
1082 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1083 extern void c_common_print_pch_checksum (FILE *f);
1084
1085 /* In *-checksum.c */
1086 extern const unsigned char executable_checksum[16];
1087
1088 /* In c-cppbuiltin.c  */
1089 extern void builtin_define_std (const char *macro);
1090 extern void builtin_define_with_value (const char *, const char *, int);
1091 extern void c_stddef_cpp_builtins (void);
1092 extern void fe_file_change (const struct line_map *);
1093 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1094
1095 /* Objective-C / Objective-C++ entry points.  */
1096
1097 /* The following ObjC/ObjC++ functions are called by the C and/or C++
1098    front-ends; they all must have corresponding stubs in stub-objc.c.  */
1099 extern tree objc_is_class_name (tree);
1100 extern tree objc_is_object_ptr (tree);
1101 extern void objc_check_decl (tree);
1102 extern int objc_is_reserved_word (tree);
1103 extern bool objc_compare_types (tree, tree, int, tree);
1104 extern void objc_volatilize_decl (tree);
1105 extern bool objc_type_quals_match (tree, tree);
1106 extern tree objc_rewrite_function_call (tree, tree);
1107 extern tree objc_message_selector (void);
1108 extern tree objc_lookup_ivar (tree, tree);
1109 extern void objc_clear_super_receiver (void);
1110 extern int objc_is_public (tree, tree);
1111 extern tree objc_is_id (tree);
1112 extern void objc_declare_alias (tree, tree);
1113 extern void objc_declare_class (tree);
1114 extern void objc_declare_protocols (tree);
1115 extern tree objc_build_message_expr (tree);
1116 extern tree objc_finish_message_expr (tree, tree, tree);
1117 extern tree objc_build_selector_expr (location_t, tree);
1118 extern tree objc_build_protocol_expr (tree);
1119 extern tree objc_build_encode_expr (tree);
1120 extern tree objc_build_string_object (tree);
1121 extern tree objc_get_protocol_qualified_type (tree, tree);
1122 extern tree objc_get_class_reference (tree);
1123 extern tree objc_get_class_ivars (tree);
1124 extern void objc_start_class_interface (tree, tree, tree);
1125 extern void objc_start_category_interface (tree, tree, tree);
1126 extern void objc_start_protocol (tree, tree);
1127 extern void objc_continue_interface (void);
1128 extern void objc_finish_interface (void);
1129 extern void objc_start_class_implementation (tree, tree);
1130 extern void objc_start_category_implementation (tree, tree);
1131 extern void objc_continue_implementation (void);
1132 extern void objc_finish_implementation (void);
1133 extern void objc_set_visibility (int);
1134 extern void objc_set_method_type (enum tree_code);
1135 extern tree objc_build_method_signature (tree, tree, tree, bool);
1136 extern void objc_add_method_declaration (tree);
1137 extern void objc_start_method_definition (tree);
1138 extern void objc_finish_method_definition (tree);
1139 extern void objc_add_instance_variable (tree);
1140 extern tree objc_build_keyword_decl (tree, tree, tree);
1141 extern tree objc_build_throw_stmt (location_t, tree);
1142 extern void objc_begin_try_stmt (location_t, tree);
1143 extern tree objc_finish_try_stmt (void);
1144 extern void objc_begin_catch_clause (tree);
1145 extern void objc_finish_catch_clause (void);
1146 extern void objc_build_finally_clause (location_t, tree);
1147 extern tree objc_build_synchronized (location_t, tree, tree);
1148 extern int objc_static_init_needed_p (void);
1149 extern tree objc_generate_static_init_call (tree);
1150 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1151
1152 /* The following are provided by the C and C++ front-ends, and called by
1153    ObjC/ObjC++.  */
1154 extern void *objc_get_current_scope (void);
1155 extern void objc_mark_locals_volatile (void *);
1156
1157 /* In c-ppoutput.c  */
1158 extern void init_pp_output (FILE *);
1159 extern void preprocess_file (cpp_reader *);
1160 extern void pp_file_change (const struct line_map *);
1161 extern void pp_dir_change (cpp_reader *, const char *);
1162 extern bool check_missing_format_attribute (tree, tree);
1163
1164 /* In c-omp.c  */
1165 extern tree c_finish_omp_master (location_t, tree);
1166 extern tree c_finish_omp_critical (location_t, tree, tree);
1167 extern tree c_finish_omp_ordered (location_t, tree);
1168 extern void c_finish_omp_barrier (location_t);
1169 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
1170 extern void c_finish_omp_flush (location_t);
1171 extern void c_finish_omp_taskwait (location_t);
1172 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1173 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1174 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1175
1176 /* Not in c-omp.c; provided by the front end.  */
1177 extern bool c_omp_sharing_predetermined (tree);
1178 extern tree c_omp_remap_decl (tree, bool);
1179 extern void record_types_used_by_current_var_decl (tree);
1180
1181 /* In order for the format checking to accept the C frontend
1182    diagnostic framework extensions, you must include this file before
1183    toplev.h, not after.  The C front end formats are a subset of those
1184    for C++, so they are the appropriate set to use in common code;
1185    cp-tree.h overrides this for C++.  */
1186 #ifndef GCC_DIAG_STYLE
1187 #define GCC_DIAG_STYLE __gcc_cdiag__
1188 #endif
1189
1190 #endif /* ! GCC_C_COMMON_H */