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_INT128,
  73   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  74   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  75   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  76   RID_SIZEOF,
  77
  78   /* C extensions */
  79   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
  80   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
  81   RID_TYPES_COMPATIBLE_P,
  82   RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
  83   RID_FRACT, RID_ACCUM,
  84
  85   /* This means to warn that this is a C++ keyword, and then treat it
  86      as a normal identifier.  */
  87   RID_CXX_COMPAT_WARN,
  88
  89   /* Too many ways of getting the name of a function as a string */
  90   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
  91
  92   /* C++ */
  93   RID_BOOL,     RID_WCHAR,    RID_CLASS,
  94   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
  95   RID_TEMPLATE, RID_NULL,     RID_CATCH,
  96   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
  97   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
  98   RID_THIS,     RID_THROW,    RID_TRUE,
  99   RID_TRY,      RID_TYPENAME, RID_TYPEID,
 100   RID_USING,    RID_CHAR16,   RID_CHAR32,
 101
 102   /* casts */
 103   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
 104
 105   /* C++ extensions */
 106   RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
 107   RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
 108   RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
 109   RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
 110   RID_IS_ABSTRACT,             RID_IS_BASE_OF,
 111   RID_IS_CONVERTIBLE_TO,       RID_IS_CLASS,
 112   RID_IS_EMPTY,                RID_IS_ENUM,
 113   RID_IS_POD,                  RID_IS_POLYMORPHIC,
 114   RID_IS_STD_LAYOUT,           RID_IS_TRIVIAL,
 115   RID_IS_UNION,
 116
 117   /* C++0x */
 118   RID_CONSTEXPR, RID_DECLTYPE, RID_NULLPTR, RID_STATIC_ASSERT,
 119
 120   /* Objective-C */
 121   RID_AT_ENCODE,   RID_AT_END,
 122   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 123   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 124   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 125   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 126   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 127   RID_AT_INTERFACE,
 128   RID_AT_IMPLEMENTATION,
 129
 130   /* Named address support, mapping the keyword to a particular named address
 131      number.  Named address space 0 is reserved for the generic address.  If
 132      there are more than 254 named addresses, the addr_space_t type will need
 133      to be grown from an unsigned char to unsigned short.  */
 134   RID_ADDR_SPACE_0,             /* generic address */
 135   RID_ADDR_SPACE_1,
 136   RID_ADDR_SPACE_2,
 137   RID_ADDR_SPACE_3,
 138   RID_ADDR_SPACE_4,
 139   RID_ADDR_SPACE_5,
 140   RID_ADDR_SPACE_6,
 141   RID_ADDR_SPACE_7,
 142   RID_ADDR_SPACE_8,
 143   RID_ADDR_SPACE_9,
 144   RID_ADDR_SPACE_10,
 145   RID_ADDR_SPACE_11,
 146   RID_ADDR_SPACE_12,
 147   RID_ADDR_SPACE_13,
 148   RID_ADDR_SPACE_14,
 149   RID_ADDR_SPACE_15,
 150
 151   RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
 152   RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
 153
 154   RID_MAX,
 155
 156   RID_FIRST_MODIFIER = RID_STATIC,
 157   RID_LAST_MODIFIER = RID_ONEWAY,
 158
 159   RID_FIRST_CXX0X = RID_CONSTEXPR,
 160   RID_LAST_CXX0X = RID_STATIC_ASSERT,
 161   RID_FIRST_AT = RID_AT_ENCODE,
 162   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 163   RID_FIRST_PQ = RID_IN,
 164   RID_LAST_PQ = RID_ONEWAY
 165 };
 166
 167 #define OBJC_IS_AT_KEYWORD(rid) \
 168   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
 169    (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
 170
 171 #define OBJC_IS_PQ_KEYWORD(rid) \
 172   ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
 173    (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
 174
 175 /* The elements of `ridpointers' are identifier nodes for the reserved
 176    type names and storage classes.  It is indexed by a RID_... value.  */
 177 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
 178
 179 /* Standard named or nameless data types of the C compiler.  */
 180
 181 enum c_tree_index
 182 {
 183     CTI_CHAR16_TYPE,
 184     CTI_CHAR32_TYPE,
 185     CTI_WCHAR_TYPE,
 186     CTI_UNDERLYING_WCHAR_TYPE,
 187     CTI_WINT_TYPE,
 188     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 189     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 190     CTI_INTMAX_TYPE,
 191     CTI_UINTMAX_TYPE,
 192     CTI_WIDEST_INT_LIT_TYPE,
 193     CTI_WIDEST_UINT_LIT_TYPE,
 194
 195     /* Types for <stdint.h>, that may not be defined on all
 196        targets.  */
 197     CTI_SIG_ATOMIC_TYPE,
 198     CTI_INT8_TYPE,
 199     CTI_INT16_TYPE,
 200     CTI_INT32_TYPE,
 201     CTI_INT64_TYPE,
 202     CTI_UINT8_TYPE,
 203     CTI_UINT16_TYPE,
 204     CTI_UINT32_TYPE,
 205     CTI_UINT64_TYPE,
 206     CTI_INT_LEAST8_TYPE,
 207     CTI_INT_LEAST16_TYPE,
 208     CTI_INT_LEAST32_TYPE,
 209     CTI_INT_LEAST64_TYPE,
 210     CTI_UINT_LEAST8_TYPE,
 211     CTI_UINT_LEAST16_TYPE,
 212     CTI_UINT_LEAST32_TYPE,
 213     CTI_UINT_LEAST64_TYPE,
 214     CTI_INT_FAST8_TYPE,
 215     CTI_INT_FAST16_TYPE,
 216     CTI_INT_FAST32_TYPE,
 217     CTI_INT_FAST64_TYPE,
 218     CTI_UINT_FAST8_TYPE,
 219     CTI_UINT_FAST16_TYPE,
 220     CTI_UINT_FAST32_TYPE,
 221     CTI_UINT_FAST64_TYPE,
 222     CTI_INTPTR_TYPE,
 223     CTI_UINTPTR_TYPE,
 224
 225     CTI_CHAR_ARRAY_TYPE,
 226     CTI_CHAR16_ARRAY_TYPE,
 227     CTI_CHAR32_ARRAY_TYPE,
 228     CTI_WCHAR_ARRAY_TYPE,
 229     CTI_INT_ARRAY_TYPE,
 230     CTI_STRING_TYPE,
 231     CTI_CONST_STRING_TYPE,
 232
 233     /* Type for boolean expressions (bool in C++, int in C).  */
 234     CTI_TRUTHVALUE_TYPE,
 235     CTI_TRUTHVALUE_TRUE,
 236     CTI_TRUTHVALUE_FALSE,
 237
 238     CTI_DEFAULT_FUNCTION_TYPE,
 239
 240     /* These are not types, but we have to look them up all the time.  */
 241     CTI_FUNCTION_NAME_DECL,
 242     CTI_PRETTY_FUNCTION_NAME_DECL,
 243     CTI_C99_FUNCTION_NAME_DECL,
 244     CTI_SAVED_FUNCTION_NAME_DECLS,
 245
 246     CTI_VOID_ZERO,
 247
 248     CTI_NULL,
 249
 250     CTI_MAX
 251 };
 252
 253 #define C_CPP_HASHNODE(id) \
 254   (&(((struct c_common_identifier *) (id))->node))
 255 #define C_RID_CODE(id) \
 256   ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
 257 #define C_SET_RID_CODE(id, code) \
 258   (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
 259
 260 /* Identifier part common to the C front ends.  Inherits from
 261    tree_identifier, despite appearances.  */
 262 struct GTY(()) c_common_identifier {
 263   struct tree_common common;
 264   struct cpp_hashnode node;
 265 };
 266
 267 /* An entry in the reserved keyword table.  */
 268
 269 struct c_common_resword
 270 {
 271   const char *const word;
 272   ENUM_BITFIELD(rid) const rid : 16;
 273   const unsigned int disable   : 16;
 274 };
 275
 276 /* Disable mask.  Keywords are disabled if (reswords[i].disable &
 277    mask) is _true_.  Thus for keywords which are present in all
 278    languages the disable field is zero.  */
 279
 280 #define D_CONLY         0x001   /* C only (not in C++).  */
 281 #define D_CXXONLY       0x002   /* C++ only (not in C).  */
 282 #define D_C99           0x004   /* In C, C99 only.  */
 283 #define D_CXX0X         0x008   /* In C++, C++0X only.  */
 284 #define D_EXT           0x010   /* GCC extension.  */
 285 #define D_EXT89         0x020   /* GCC extension incorporated in C99.  */
 286 #define D_ASM           0x040   /* Disabled by -fno-asm.  */
 287 #define D_OBJC          0x080   /* In Objective C and neither C nor C++.  */
 288 #define D_CXX_OBJC      0x100   /* In Objective C, and C++, but not C.  */
 289 #define D_CXXWARN       0x200   /* In C warn with -Wcxx-compat.  */
 290
 291 /* The reserved keyword table.  */
 292 extern const struct c_common_resword c_common_reswords[];
 293
 294 /* The number of items in the reserved keyword table.  */
 295 extern const unsigned int num_c_common_reswords;
 296
 297 #define char16_type_node                c_global_trees[CTI_CHAR16_TYPE]
 298 #define char32_type_node                c_global_trees[CTI_CHAR32_TYPE]
 299 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 300 #define underlying_wchar_type_node      c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
 301 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 302 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 303 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 304 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 305 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 306 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 307 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 308
 309 #define sig_atomic_type_node            c_global_trees[CTI_SIG_ATOMIC_TYPE]
 310 #define int8_type_node                  c_global_trees[CTI_INT8_TYPE]
 311 #define int16_type_node                 c_global_trees[CTI_INT16_TYPE]
 312 #define int32_type_node                 c_global_trees[CTI_INT32_TYPE]
 313 #define int64_type_node                 c_global_trees[CTI_INT64_TYPE]
 314 #define uint8_type_node                 c_global_trees[CTI_UINT8_TYPE]
 315 #define uint16_type_node                c_global_trees[CTI_UINT16_TYPE]
 316 #define c_uint32_type_node              c_global_trees[CTI_UINT32_TYPE]
 317 #define c_uint64_type_node              c_global_trees[CTI_UINT64_TYPE]
 318 #define int_least8_type_node            c_global_trees[CTI_INT_LEAST8_TYPE]
 319 #define int_least16_type_node           c_global_trees[CTI_INT_LEAST16_TYPE]
 320 #define int_least32_type_node           c_global_trees[CTI_INT_LEAST32_TYPE]
 321 #define int_least64_type_node           c_global_trees[CTI_INT_LEAST64_TYPE]
 322 #define uint_least8_type_node           c_global_trees[CTI_UINT_LEAST8_TYPE]
 323 #define uint_least16_type_node          c_global_trees[CTI_UINT_LEAST16_TYPE]
 324 #define uint_least32_type_node          c_global_trees[CTI_UINT_LEAST32_TYPE]
 325 #define uint_least64_type_node          c_global_trees[CTI_UINT_LEAST64_TYPE]
 326 #define int_fast8_type_node             c_global_trees[CTI_INT_FAST8_TYPE]
 327 #define int_fast16_type_node            c_global_trees[CTI_INT_FAST16_TYPE]
 328 #define int_fast32_type_node            c_global_trees[CTI_INT_FAST32_TYPE]
 329 #define int_fast64_type_node            c_global_trees[CTI_INT_FAST64_TYPE]
 330 #define uint_fast8_type_node            c_global_trees[CTI_UINT_FAST8_TYPE]
 331 #define uint_fast16_type_node           c_global_trees[CTI_UINT_FAST16_TYPE]
 332 #define uint_fast32_type_node           c_global_trees[CTI_UINT_FAST32_TYPE]
 333 #define uint_fast64_type_node           c_global_trees[CTI_UINT_FAST64_TYPE]
 334 #define intptr_type_node                c_global_trees[CTI_INTPTR_TYPE]
 335 #define uintptr_type_node               c_global_trees[CTI_UINTPTR_TYPE]
 336
 337 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 338 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 339 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 340
 341 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 342 #define char16_array_type_node          c_global_trees[CTI_CHAR16_ARRAY_TYPE]
 343 #define char32_array_type_node          c_global_trees[CTI_CHAR32_ARRAY_TYPE]
 344 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 345 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 346 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 347 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 348
 349 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 350
 351 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 352 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 353 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 354 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 355
 356 /* A node for `((void) 0)'.  */
 357 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 358
 359 /* The node for C++ `__null'.  */
 360 #define null_node                       c_global_trees[CTI_NULL]
 361
 362 extern GTY(()) tree c_global_trees[CTI_MAX];
 363
 364 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 365    tree for size reasons.  */
 366 struct GTY(()) sorted_fields_type {
 367   int len;
 368   tree GTY((length ("%h.len"))) elts[1];
 369 };
 370
 371 /* Mark which labels are explicitly declared.
 372    These may be shadowed, and may be referenced from nested functions.  */
 373 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 374
 375 typedef enum c_language_kind
 376 {
 377   clk_c         = 0,            /* C90, C94 or C99 */
 378   clk_objc      = 1,            /* clk_c with ObjC features.  */
 379   clk_cxx       = 2,            /* ANSI/ISO C++ */
 380   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 381 }
 382 c_language_kind;
 383
 384 /* To test for a specific language use c_language, defined by each
 385    front end.  For "ObjC features" or "not C++" use the macros.  */
 386 extern c_language_kind c_language;
 387
 388 #define c_dialect_cxx()         ((c_language & clk_cxx) != 0)
 389 #define c_dialect_objc()        ((c_language & clk_objc) != 0)
 390
 391 /* The various name of operator that appears in error messages. */
 392 typedef enum ref_operator {
 393   /* NULL */
 394   RO_NULL,
 395   /* array indexing */
 396   RO_ARRAY_INDEXING,
 397   /* unary * */
 398   RO_UNARY_STAR,
 399   /* -> */
 400   RO_ARROW,
 401   /* implicit conversion */
 402   RO_IMPLICIT_CONVERSION
 403 } ref_operator;
 404
 405 /* Information about a statement tree.  */
 406
 407 struct GTY(()) stmt_tree_s {
 408   /* The current statement list being collected.  */
 409   tree x_cur_stmt_list;
 410
 411   /* In C++, Nonzero if we should treat statements as full
 412      expressions.  In particular, this variable is no-zero if at the
 413      end of a statement we should destroy any temporaries created
 414      during that statement.  Similarly, if, at the end of a block, we
 415      should destroy any local variables in this block.  Normally, this
 416      variable is nonzero, since those are the normal semantics of
 417      C++.
 418
 419      However, in order to represent aggregate initialization code as
 420      tree structure, we use statement-expressions.  The statements
 421      within the statement expression should not result in cleanups
 422      being run until the entire enclosing statement is complete.
 423
 424      This flag has no effect in C.  */
 425   int stmts_are_full_exprs_p;
 426 };
 427
 428 typedef struct stmt_tree_s *stmt_tree;
 429
 430 /* Global state pertinent to the current function.  Some C dialects
 431    extend this structure with additional fields.  */
 432
 433 struct GTY(()) c_language_function {
 434   /* While we are parsing the function, this contains information
 435      about the statement-tree that we are building.  */
 436   struct stmt_tree_s x_stmt_tree;
 437 };
 438
 439 /* When building a statement-tree, this is the current statement list
 440    being collected.  It's TREE_CHAIN is a back-pointer to the previous
 441    statement list.  */
 442
 443 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
 444
 445 /* Language-specific hooks.  */
 446
 447 /* If non-NULL, this function is called after a precompile header file
 448    is loaded.  */
 449 extern void (*lang_post_pch_load) (void);
 450
 451 extern void push_file_scope (void);
 452 extern void pop_file_scope (void);
 453 extern stmt_tree current_stmt_tree (void);
 454 extern tree push_stmt_list (void);
 455 extern tree pop_stmt_list (tree);
 456 extern tree add_stmt (tree);
 457 extern void push_cleanup (tree, tree, bool);
 458 extern tree pushdecl_top_level (tree);
 459 extern tree pushdecl (tree);
 460 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 461                                location_t, tree, tree);
 462 extern tree build_indirect_ref (location_t, tree, ref_operator);
 463
 464 extern int c_expand_decl (tree);
 465
 466 extern int field_decl_cmp (const void *, const void *);
 467 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 468                                   void *);
 469 extern bool has_c_linkage (const_tree decl);
 470 \f
 471 /* Switches common to the C front ends.  */
 472
 473 /* Nonzero if prepreprocessing only.  */
 474
 475 extern int flag_preprocess_only;
 476
 477 /* Zero means that faster, ...NonNil variants of objc_msgSend...
 478    calls will be used in ObjC; passing nil receivers to such calls
 479    will most likely result in crashes.  */
 480 extern int flag_nil_receivers;
 481
 482 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
 483    @try, etc.) in source code.  */
 484 extern int flag_objc_exceptions;
 485
 486 /* Nonzero means that we generate NeXT setjmp based exceptions.  */
 487 extern int flag_objc_sjlj_exceptions;
 488
 489 /* Nonzero means that code generation will be altered to support
 490    "zero-link" execution.  This currently affects ObjC only, but may
 491    affect other languages in the future.  */
 492 extern int flag_zero_link;
 493
 494 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
 495    unit.  It will inform the ObjC runtime that class definition(s) herein
 496    contained are to replace one(s) previously loaded.  */
 497 extern int flag_replace_objc_classes;
 498
 499 /* Nonzero means don't output line number information.  */
 500
 501 extern char flag_no_line_commands;
 502
 503 /* Nonzero causes -E output not to be done, but directives such as
 504    #define that have side effects are still obeyed.  */
 505
 506 extern char flag_no_output;
 507
 508 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 509    'N' or 'U' of the command line switch.  */
 510
 511 extern char flag_dump_macros;
 512
 513 /* Nonzero means pass #include lines through to the output.  */
 514
 515 extern char flag_dump_includes;
 516
 517 /* Nonzero means process PCH files while preprocessing.  */
 518
 519 extern bool flag_pch_preprocess;
 520
 521 /* The file name to which we should write a precompiled header, or
 522    NULL if no header will be written in this compile.  */
 523
 524 extern const char *pch_file;
 525
 526 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 527    user's namespace.  */
 528
 529 extern int flag_iso;
 530
 531 /* Nonzero if -undef was given.  It suppresses target built-in macros
 532    and assertions.  */
 533
 534 extern int flag_undef;
 535
 536 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 537
 538 extern int flag_no_builtin;
 539
 540 /* Nonzero means don't recognize the non-ANSI builtin functions.
 541    -ansi sets this.  */
 542
 543 extern int flag_no_nonansi_builtin;
 544
 545 /* Nonzero means give `double' the same size as `float'.  */
 546
 547 extern int flag_short_double;
 548
 549 /* Nonzero means give `wchar_t' the same size as `short'.  */
 550
 551 extern int flag_short_wchar;
 552
 553 /* Nonzero means allow implicit conversions between vectors with
 554    differing numbers of subparts and/or differing element types.  */
 555 extern int flag_lax_vector_conversions;
 556
 557 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 558 extern int flag_ms_extensions;
 559
 560 /* Nonzero means don't recognize the keyword `asm'.  */
 561
 562 extern int flag_no_asm;
 563
 564 /* Nonzero means give string constants the type `const char *', as mandated
 565    by the standard.  */
 566
 567 extern int flag_const_strings;
 568
 569 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 570
 571 extern int flag_signed_bitfields;
 572
 573 /* Warn about #pragma directives that are not recognized.  */
 574
 575 extern int warn_unknown_pragmas; /* Tri state variable.  */
 576
 577 /* Warn about format/argument anomalies in calls to formatted I/O functions
 578    (*printf, *scanf, strftime, strfmon, etc.).  */
 579
 580 extern int warn_format;
 581
 582
 583 /* C/ObjC language option variables.  */
 584
 585
 586 /* Nonzero means allow type mismatches in conditional expressions;
 587    just make their values `void'.  */
 588
 589 extern int flag_cond_mismatch;
 590
 591 /* Nonzero means enable C89 Amendment 1 features.  */
 592
 593 extern int flag_isoc94;
 594
 595 /* Nonzero means use the ISO C99 (or C1X) dialect of C.  */
 596
 597 extern int flag_isoc99;
 598
 599 /* Nonzero means use the ISO C1X dialect of C.  */
 600
 601 extern int flag_isoc1x;
 602
 603 /* Nonzero means that we have builtin functions, and main is an int.  */
 604
 605 extern int flag_hosted;
 606
 607 /* ObjC language option variables.  */
 608
 609
 610 /* Open and close the file for outputting class declarations, if
 611    requested (ObjC).  */
 612
 613 extern int flag_gen_declaration;
 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 /* ???.  Undocumented.  */
 622
 623 extern const char *constant_string_class_name;
 624
 625
 626 /* C++ language option variables.  */
 627
 628
 629 /* Nonzero means don't recognize any extension keywords.  */
 630
 631 extern int flag_no_gnu_keywords;
 632
 633 /* Nonzero means do emit exported implementations of functions even if
 634    they can be inlined.  */
 635
 636 extern int flag_implement_inlines;
 637
 638 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 639
 640 extern int flag_implicit_templates;
 641
 642 /* Nonzero means that implicit instantiations of inline templates will be
 643    emitted if needed, even if instantiations of non-inline templates
 644    aren't.  */
 645
 646 extern int flag_implicit_inline_templates;
 647
 648 /* Nonzero means generate separate instantiation control files and
 649    juggle them at link time.  */
 650
 651 extern int flag_use_repository;
 652
 653 /* Nonzero if we want to issue diagnostics that the standard says are not
 654    required.  */
 655
 656 extern int flag_optional_diags;
 657
 658 /* Nonzero means we should attempt to elide constructors when possible.  */
 659
 660 extern int flag_elide_constructors;
 661
 662 /* Nonzero means that member functions defined in class scope are
 663    inline by default.  */
 664
 665 extern int flag_default_inline;
 666
 667 /* Controls whether compiler generates 'type descriptor' that give
 668    run-time type information.  */
 669
 670 extern int flag_rtti;
 671
 672 /* Nonzero if we want to conserve space in the .o files.  We do this
 673    by putting uninitialized data and runtime initialized data into
 674    .common instead of .data at the expense of not flagging multiple
 675    definitions.  */
 676
 677 extern int flag_conserve_space;
 678
 679 /* Nonzero if we want to obey access control semantics.  */
 680
 681 extern int flag_access_control;
 682
 683 /* Nonzero if we want to check the return value of new and avoid calling
 684    constructors if it is a null pointer.  */
 685
 686 extern int flag_check_new;
 687
 688 /* The supported C++ dialects.  */
 689
 690 enum cxx_dialect {
 691   /* C++98  */
 692   cxx98,
 693   /* Experimental features that are likely to become part of
 694      C++0x.  */
 695   cxx0x
 696 };
 697
 698 /* The C++ dialect being used. C++98 is the default.  */
 699 extern enum cxx_dialect cxx_dialect;
 700
 701 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 702    initialization variables.
 703    0: Old rules, set by -fno-for-scope.
 704    2: New ISO rules, set by -ffor-scope.
 705    1: Try to implement new ISO rules, but with backup compatibility
 706    (and warnings).  This is the default, for now.  */
 707
 708 extern int flag_new_for_scope;
 709
 710 /* Nonzero if we want to emit defined symbols with common-like linkage as
 711    weak symbols where possible, in order to conform to C++ semantics.
 712    Otherwise, emit them as local symbols.  */
 713
 714 extern int flag_weak;
 715
 716 /* 0 means we want the preprocessor to not emit line directives for
 717    the current working directory.  1 means we want it to do it.  -1
 718    means we should decide depending on whether debugging information
 719    is being emitted or not.  */
 720
 721 extern int flag_working_directory;
 722
 723 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 724    destructors for local statics and global objects.  */
 725
 726 extern int flag_use_cxa_atexit;
 727
 728 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
 729    logic.  */
 730
 731 extern int flag_use_cxa_get_exception_ptr;
 732
 733 /* Nonzero means to implement standard semantics for exception
 734    specifications, calling unexpected if an exception is thrown that
 735    doesn't match the specification.  Zero means to treat them as
 736    assertions and optimize accordingly, but not check them.  */
 737
 738 extern int flag_enforce_eh_specs;
 739
 740 /* Nonzero (the default) means to generate thread-safe code for
 741    initializing local statics.  */
 742
 743 extern int flag_threadsafe_statics;
 744
 745 /* Nonzero if we want to pretty-print template specializations as the
 746    template signature followed by the arguments.  */
 747
 748 extern int flag_pretty_templates;
 749
 750 /* Warn about using __null (as NULL in C++) as sentinel.  For code compiled
 751    with GCC this doesn't matter as __null is guaranteed to have the right
 752    size.  */
 753
 754 extern int warn_strict_null_sentinel;
 755
 756 /* Maximum template instantiation depth.  This limit is rather
 757    arbitrary, but it exists to limit the time it takes to notice
 758    infinite template instantiations.  */
 759
 760 extern int max_tinst_depth;
 761
 762 /* Nonzero means that we should not issue warnings about problems that
 763    occur when the code is executed, because the code being processed
 764    is not expected to be executed.  This is set during parsing.  This
 765    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 766    not a bool, because unexecuted expressions can nest.  */
 767
 768 extern int c_inhibit_evaluation_warnings;
 769
 770 /* Whether lexing has been completed, so subsequent preprocessor
 771    errors should use the compiler's input_location.  */
 772
 773 extern bool done_lexing;
 774
 775 /* C types are partitioned into three subsets: object, function, and
 776    incomplete types.  */
 777 #define C_TYPE_OBJECT_P(type) \
 778   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 779
 780 #define C_TYPE_INCOMPLETE_P(type) \
 781   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 782
 783 #define C_TYPE_FUNCTION_P(type) \
 784   (TREE_CODE (type) == FUNCTION_TYPE)
 785
 786 /* For convenience we define a single macro to identify the class of
 787    object or incomplete types.  */
 788 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 789   (!C_TYPE_FUNCTION_P (type))
 790
 791 /* Attribute table common to the C front ends.  */
 792 extern const struct attribute_spec c_common_attribute_table[];
 793 extern const struct attribute_spec c_common_format_attribute_table[];
 794
 795 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 796    ID is the identifier to use, NAME is the string.
 797    TYPE_DEP indicates whether it depends on type of the function or not
 798    (i.e. __PRETTY_FUNCTION__).  */
 799
 800 extern tree (*make_fname_decl) (location_t, tree, int);
 801
 802 extern void c_register_addr_space (const char *str, addr_space_t as);
 803 extern const char *c_addr_space_name (addr_space_t as);
 804 extern tree identifier_global_value (tree);
 805 extern void record_builtin_type (enum rid, const char *, tree);
 806 extern tree build_void_list_node (void);
 807 extern void start_fname_decls (void);
 808 extern void finish_fname_decls (void);
 809 extern const char *fname_as_string (int);
 810 extern tree fname_decl (location_t, unsigned, tree);
 811
 812 extern void check_function_arguments (tree, int, tree *, tree);
 813 extern void check_function_arguments_recurse (void (*)
 814                                               (void *, tree,
 815                                                unsigned HOST_WIDE_INT),
 816                                               void *, tree,
 817                                               unsigned HOST_WIDE_INT);
 818 extern bool check_builtin_function_arguments (tree, int, tree *);
 819 extern void check_function_format (tree, int, tree *);
 820 extern void set_Wformat (int);
 821 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 822 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 823 extern bool attribute_takes_identifier_p (const_tree);
 824 extern int c_common_handle_option (size_t code, const char *arg, int value, int kind);
 825 extern bool c_common_missing_argument (const char *opt, size_t code);
 826 extern tree c_common_type_for_mode (enum machine_mode, int);
 827 extern tree c_common_type_for_size (unsigned int, int);
 828 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 829                                                 int, int);
 830 extern tree c_common_unsigned_type (tree);
 831 extern tree c_common_signed_type (tree);
 832 extern tree c_common_signed_or_unsigned_type (int, tree);
 833 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 834 extern bool decl_with_nonnull_addr_p (const_tree);
 835 extern tree c_fully_fold (tree, bool, bool *);
 836 extern tree decl_constant_value_for_optimization (tree);
 837 extern tree c_wrap_maybe_const (tree, bool);
 838 extern tree c_save_expr (tree);
 839 extern tree c_common_truthvalue_conversion (location_t, tree);
 840 extern void c_apply_type_quals_to_decl (int, tree);
 841 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 842 extern tree c_alignof_expr (location_t, tree);
 843 /* Print an error message for invalid operands to arith operation CODE.
 844    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 845 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 846 extern tree fix_string_type (tree);
 847 extern void constant_expression_warning (tree);
 848 extern void constant_expression_error (tree);
 849 extern bool strict_aliasing_warning (tree, tree, tree);
 850 extern void warnings_for_convert_and_check (tree, tree, tree);
 851 extern tree convert_and_check (tree, tree);
 852 extern void overflow_warning (location_t, tree);
 853 extern void warn_logical_operator (location_t, enum tree_code, tree,
 854                                    enum tree_code, tree, enum tree_code, tree);
 855 extern void check_main_parameter_types (tree decl);
 856 extern bool c_determine_visibility (tree);
 857 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 858 extern void mark_valid_location_for_stdc_pragma (bool);
 859 extern bool valid_location_for_stdc_pragma_p (void);
 860 extern void set_float_const_decimal64 (void);
 861 extern void clear_float_const_decimal64 (void);
 862 extern bool float_const_decimal64_p (void);
 863
 864 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 865 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
 866
 867 /* Subroutine of build_binary_op, used for certain operations.  */
 868 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 869
 870 /* Subroutine of build_binary_op, used for comparison operations.
 871    See if the operands have both been converted from subword integer types
 872    and, if so, perhaps change them both back to their original type.  */
 873 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 874
 875 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
 876
 877 /* Add qualifiers to a type, in the fashion for C.  */
 878 extern tree c_build_qualified_type (tree, int);
 879
 880 /* Build tree nodes and builtin functions common to both C and C++ language
 881    frontends.  */
 882 extern void c_common_nodes_and_builtins (void);
 883
 884 extern void disable_builtin_function (const char *);
 885
 886 extern void set_compound_literal_name (tree decl);
 887
 888 extern tree build_va_arg (location_t, tree, tree);
 889
 890 extern unsigned int c_common_init_options (unsigned int, const char **);
 891 extern bool c_common_post_options (const char **);
 892 extern bool c_common_init (void);
 893 extern void c_common_finish (void);
 894 extern void c_common_parse_file (int);
 895 extern alias_set_type c_common_get_alias_set (tree);
 896 extern void c_register_builtin_type (tree, const char*);
 897 extern bool c_promoting_integer_type_p (const_tree);
 898 extern int self_promoting_args_p (const_tree);
 899 extern tree strip_pointer_operator (tree);
 900 extern tree strip_pointer_or_array_types (tree);
 901 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 902
 903 /* This is the basic parsing function.  */
 904 extern void c_parse_file (void);
 905 /* This is misnamed, it actually performs end-of-compilation processing.  */
 906 extern void finish_file (void);
 907
 908
 909 /* These macros provide convenient access to the various _STMT nodes.  */
 910
 911 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 912    if a statement expression.  */
 913 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 914   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 915
 916 /* Nonzero if a label has been added to the statement list.  */
 917 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 918   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 919
 920 /* C_MAYBE_CONST_EXPR accessors.  */
 921 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 922   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 923 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 924   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 925 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 926   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 927 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 928   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 929 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 930   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 931    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 932        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 933            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 934
 935 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 936 #define DECL_C_BIT_FIELD(NODE) \
 937   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 938 #define SET_DECL_C_BIT_FIELD(NODE) \
 939   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 940 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 941   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 942
 943 extern tree do_case (location_t, tree, tree);
 944 extern tree build_stmt (location_t, enum tree_code, ...);
 945 extern tree build_case_label (location_t, tree, tree, tree);
 946
 947 /* These functions must be defined by each front-end which implements
 948    a variant of the C language.  They are used in c-common.c.  */
 949
 950 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 951 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 952 extern tree perform_integral_promotions (tree);
 953
 954 /* These functions must be defined by each front-end which implements
 955    a variant of the C language.  They are used by port files.  */
 956
 957 extern tree default_conversion (tree);
 958
 959 /* Given two integer or real types, return the type for their sum.
 960    Given two compatible ANSI C types, returns the merged type.  */
 961
 962 extern tree common_type (tree, tree);
 963
 964 extern tree decl_constant_value (tree);
 965
 966 /* Handle increment and decrement of boolean types.  */
 967 extern tree boolean_increment (enum tree_code, tree);
 968
 969 extern int case_compare (splay_tree_key, splay_tree_key);
 970
 971 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 972
 973 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 974
 975 extern tree build_function_call (location_t, tree, tree);
 976
 977 extern tree build_function_call_vec (location_t, tree,
 978                                      VEC(tree,gc) *, VEC(tree,gc) *);
 979
 980 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
 981
 982 extern tree finish_label_address_expr (tree, location_t);
 983
 984 /* Same function prototype, but the C and C++ front ends have
 985    different implementations.  Used in c-common.c.  */
 986 extern tree lookup_label (tree);
 987 extern tree lookup_name (tree);
 988 extern bool lvalue_p (const_tree);
 989
 990 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 991 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 992
 993 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 994
 995 extern void init_c_lex (void);
 996
 997 extern void c_cpp_builtins (cpp_reader *);
 998 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 999
1000 /* Positive if an implicit `extern "C"' scope has just been entered;
1001    negative if such a scope has just been exited.  */
1002 extern GTY(()) int pending_lang_change;
1003
1004 /* Information recorded about each file examined during compilation.  */
1005
1006 struct c_fileinfo
1007 {
1008   int time;     /* Time spent in the file.  */
1009
1010   /* Flags used only by C++.
1011      INTERFACE_ONLY nonzero means that we are in an "interface" section
1012      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
1013      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
1014      INTERFACE_ONLY is zero, it means that we are responsible for
1015      exporting definitions that others might need.  */
1016   short interface_only;
1017   short interface_unknown;
1018 };
1019
1020 struct c_fileinfo *get_fileinfo (const char *);
1021 extern void dump_time_statistics (void);
1022
1023 extern bool c_dump_tree (void *, tree);
1024
1025 extern void verify_sequence_points (tree);
1026
1027 extern tree fold_offsetof (tree, tree);
1028
1029 /* Places where an lvalue, or modifiable lvalue, may be required.
1030    Used to select diagnostic messages in lvalue_error and
1031    readonly_error.  */
1032 enum lvalue_use {
1033   lv_assign,
1034   lv_increment,
1035   lv_decrement,
1036   lv_addressof,
1037   lv_asm
1038 };
1039
1040 extern void lvalue_error (enum lvalue_use);
1041
1042 extern int complete_array_type (tree *, tree, bool);
1043
1044 extern tree builtin_type_for_size (int, bool);
1045
1046 extern void warn_array_subscript_with_type_char (tree);
1047 extern void warn_about_parentheses (enum tree_code,
1048                                     enum tree_code, tree,
1049                                     enum tree_code, tree);
1050 extern void warn_for_unused_label (tree label);
1051 extern void warn_for_div_by_zero (location_t, tree divisor);
1052 extern void warn_for_sign_compare (location_t,
1053                                    tree orig_op0, tree orig_op1,
1054                                    tree op0, tree op1,
1055                                    tree result_type,
1056                                    enum tree_code resultcode);
1057 extern void set_underlying_type (tree x);
1058 extern bool is_typedef_decl (tree x);
1059 extern VEC(tree,gc) *make_tree_vector (void);
1060 extern void release_tree_vector (VEC(tree,gc) *);
1061 extern VEC(tree,gc) *make_tree_vector_single (tree);
1062 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
1063
1064 /* In c-gimplify.c  */
1065 extern void c_genericize (tree);
1066 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1067 extern tree c_build_bind_expr (location_t, tree, tree);
1068
1069 /* In c-pch.c  */
1070 extern void pch_init (void);
1071 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1072 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1073                                const char *orig);
1074 extern void c_common_write_pch (void);
1075 extern void c_common_no_more_pch (void);
1076 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1077 extern void c_common_print_pch_checksum (FILE *f);
1078
1079 /* In *-checksum.c */
1080 extern const unsigned char executable_checksum[16];
1081
1082 /* In c-cppbuiltin.c  */
1083 extern void builtin_define_std (const char *macro);
1084 extern void builtin_define_with_value (const char *, const char *, int);
1085 extern void c_stddef_cpp_builtins (void);
1086 extern void fe_file_change (const struct line_map *);
1087 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1088
1089 /* Objective-C / Objective-C++ entry points.  */
1090
1091 /* The following ObjC/ObjC++ functions are called by the C and/or C++
1092    front-ends; they all must have corresponding stubs in stub-objc.c.  */
1093 extern tree objc_is_class_name (tree);
1094 extern tree objc_is_object_ptr (tree);
1095 extern void objc_check_decl (tree);
1096 extern int objc_is_reserved_word (tree);
1097 extern bool objc_compare_types (tree, tree, int, tree);
1098 extern void objc_volatilize_decl (tree);
1099 extern bool objc_type_quals_match (tree, tree);
1100 extern tree objc_rewrite_function_call (tree, tree);
1101 extern tree objc_message_selector (void);
1102 extern tree objc_lookup_ivar (tree, tree);
1103 extern void objc_clear_super_receiver (void);
1104 extern int objc_is_public (tree, tree);
1105 extern tree objc_is_id (tree);
1106 extern void objc_declare_alias (tree, tree);
1107 extern void objc_declare_class (tree);
1108 extern void objc_declare_protocols (tree);
1109 extern tree objc_build_message_expr (tree);
1110 extern tree objc_finish_message_expr (tree, tree, tree);
1111 extern tree objc_build_selector_expr (location_t, tree);
1112 extern tree objc_build_protocol_expr (tree);
1113 extern tree objc_build_encode_expr (tree);
1114 extern tree objc_build_string_object (tree);
1115 extern tree objc_get_protocol_qualified_type (tree, tree);
1116 extern tree objc_get_class_reference (tree);
1117 extern tree objc_get_class_ivars (tree);
1118 extern void objc_start_class_interface (tree, tree, tree);
1119 extern void objc_start_category_interface (tree, tree, tree);
1120 extern void objc_start_protocol (tree, tree);
1121 extern void objc_continue_interface (void);
1122 extern void objc_finish_interface (void);
1123 extern void objc_start_class_implementation (tree, tree);
1124 extern void objc_start_category_implementation (tree, tree);
1125 extern void objc_continue_implementation (void);
1126 extern void objc_finish_implementation (void);
1127 extern void objc_set_visibility (int);
1128 extern void objc_set_method_type (enum tree_code);
1129 extern tree objc_build_method_signature (tree, tree, tree, bool);
1130 extern void objc_add_method_declaration (tree);
1131 extern void objc_start_method_definition (tree);
1132 extern void objc_finish_method_definition (tree);
1133 extern void objc_add_instance_variable (tree);
1134 extern tree objc_build_keyword_decl (tree, tree, tree);
1135 extern tree objc_build_throw_stmt (location_t, tree);
1136 extern void objc_begin_try_stmt (location_t, tree);
1137 extern tree objc_finish_try_stmt (void);
1138 extern void objc_begin_catch_clause (tree);
1139 extern void objc_finish_catch_clause (void);
1140 extern void objc_build_finally_clause (location_t, tree);
1141 extern tree objc_build_synchronized (location_t, tree, tree);
1142 extern int objc_static_init_needed_p (void);
1143 extern tree objc_generate_static_init_call (tree);
1144 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1145
1146 /* The following are provided by the C and C++ front-ends, and called by
1147    ObjC/ObjC++.  */
1148 extern void *objc_get_current_scope (void);
1149 extern void objc_mark_locals_volatile (void *);
1150
1151 /* In c-ppoutput.c  */
1152 extern void init_pp_output (FILE *);
1153 extern void preprocess_file (cpp_reader *);
1154 extern void pp_file_change (const struct line_map *);
1155 extern void pp_dir_change (cpp_reader *, const char *);
1156 extern bool check_missing_format_attribute (tree, tree);
1157
1158 /* In c-omp.c  */
1159 extern tree c_finish_omp_master (location_t, tree);
1160 extern tree c_finish_omp_critical (location_t, tree, tree);
1161 extern tree c_finish_omp_ordered (location_t, tree);
1162 extern void c_finish_omp_barrier (location_t);
1163 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
1164 extern void c_finish_omp_flush (location_t);
1165 extern void c_finish_omp_taskwait (location_t);
1166 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1167 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1168 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1169
1170 /* Not in c-omp.c; provided by the front end.  */
1171 extern bool c_omp_sharing_predetermined (tree);
1172 extern tree c_omp_remap_decl (tree, bool);
1173 extern void record_types_used_by_current_var_decl (tree);
1174
1175 /* In order for the format checking to accept the C frontend
1176    diagnostic framework extensions, you must include this file before
1177    toplev.h, not after.  The C front end formats are a subset of those
1178    for C++, so they are the appropriate set to use in common code;
1179    cp-tree.h overrides this for C++.  */
1180 #ifndef GCC_DIAG_STYLE
1181 #define GCC_DIAG_STYLE __gcc_cdiag__
1182 #endif
1183
1184 #endif /* ! GCC_C_COMMON_H */