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 /* Information about a statement tree.  */
 395
 396 struct GTY(()) stmt_tree_s {
 397   /* The current statement list being collected.  */
 398   tree x_cur_stmt_list;
 399
 400   /* In C++, Nonzero if we should treat statements as full
 401      expressions.  In particular, this variable is no-zero if at the
 402      end of a statement we should destroy any temporaries created
 403      during that statement.  Similarly, if, at the end of a block, we
 404      should destroy any local variables in this block.  Normally, this
 405      variable is nonzero, since those are the normal semantics of
 406      C++.
 407
 408      However, in order to represent aggregate initialization code as
 409      tree structure, we use statement-expressions.  The statements
 410      within the statement expression should not result in cleanups
 411      being run until the entire enclosing statement is complete.
 412
 413      This flag has no effect in C.  */
 414   int stmts_are_full_exprs_p;
 415 };
 416
 417 typedef struct stmt_tree_s *stmt_tree;
 418
 419 /* Global state pertinent to the current function.  Some C dialects
 420    extend this structure with additional fields.  */
 421
 422 struct GTY(()) c_language_function {
 423   /* While we are parsing the function, this contains information
 424      about the statement-tree that we are building.  */
 425   struct stmt_tree_s x_stmt_tree;
 426 };
 427
 428 /* When building a statement-tree, this is the current statement list
 429    being collected.  It's TREE_CHAIN is a back-pointer to the previous
 430    statement list.  */
 431
 432 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
 433
 434 /* Language-specific hooks.  */
 435
 436 /* If non-NULL, this function is called after a precompile header file
 437    is loaded.  */
 438 extern void (*lang_post_pch_load) (void);
 439
 440 extern void push_file_scope (void);
 441 extern void pop_file_scope (void);
 442 extern stmt_tree current_stmt_tree (void);
 443 extern tree push_stmt_list (void);
 444 extern tree pop_stmt_list (tree);
 445 extern tree add_stmt (tree);
 446 extern void push_cleanup (tree, tree, bool);
 447 extern tree pushdecl_top_level (tree);
 448 extern tree pushdecl (tree);
 449 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
 450                                location_t, tree, tree);
 451 extern tree build_indirect_ref (location_t, tree, const char *);
 452
 453 extern int c_expand_decl (tree);
 454
 455 extern int field_decl_cmp (const void *, const void *);
 456 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 457                                   void *);
 458 extern bool has_c_linkage (const_tree decl);
 459 \f
 460 /* Switches common to the C front ends.  */
 461
 462 /* Nonzero if prepreprocessing only.  */
 463
 464 extern int flag_preprocess_only;
 465
 466 /* Zero means that faster, ...NonNil variants of objc_msgSend...
 467    calls will be used in ObjC; passing nil receivers to such calls
 468    will most likely result in crashes.  */
 469 extern int flag_nil_receivers;
 470
 471 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
 472    @try, etc.) in source code.  */
 473 extern int flag_objc_exceptions;
 474
 475 /* Nonzero means that we generate NeXT setjmp based exceptions.  */
 476 extern int flag_objc_sjlj_exceptions;
 477
 478 /* Nonzero means that code generation will be altered to support
 479    "zero-link" execution.  This currently affects ObjC only, but may
 480    affect other languages in the future.  */
 481 extern int flag_zero_link;
 482
 483 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
 484    unit.  It will inform the ObjC runtime that class definition(s) herein
 485    contained are to replace one(s) previously loaded.  */
 486 extern int flag_replace_objc_classes;
 487
 488 /* Nonzero means don't output line number information.  */
 489
 490 extern char flag_no_line_commands;
 491
 492 /* Nonzero causes -E output not to be done, but directives such as
 493    #define that have side effects are still obeyed.  */
 494
 495 extern char flag_no_output;
 496
 497 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
 498    'N' or 'U' of the command line switch.  */
 499
 500 extern char flag_dump_macros;
 501
 502 /* Nonzero means pass #include lines through to the output.  */
 503
 504 extern char flag_dump_includes;
 505
 506 /* Nonzero means process PCH files while preprocessing.  */
 507
 508 extern bool flag_pch_preprocess;
 509
 510 /* The file name to which we should write a precompiled header, or
 511    NULL if no header will be written in this compile.  */
 512
 513 extern const char *pch_file;
 514
 515 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 516    user's namespace.  */
 517
 518 extern int flag_iso;
 519
 520 /* Nonzero if -undef was given.  It suppresses target built-in macros
 521    and assertions.  */
 522
 523 extern int flag_undef;
 524
 525 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 526
 527 extern int flag_no_builtin;
 528
 529 /* Nonzero means don't recognize the non-ANSI builtin functions.
 530    -ansi sets this.  */
 531
 532 extern int flag_no_nonansi_builtin;
 533
 534 /* Nonzero means give `double' the same size as `float'.  */
 535
 536 extern int flag_short_double;
 537
 538 /* Nonzero means give `wchar_t' the same size as `short'.  */
 539
 540 extern int flag_short_wchar;
 541
 542 /* Nonzero means allow implicit conversions between vectors with
 543    differing numbers of subparts and/or differing element types.  */
 544 extern int flag_lax_vector_conversions;
 545
 546 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 547 extern int flag_ms_extensions;
 548
 549 /* Nonzero means don't recognize the keyword `asm'.  */
 550
 551 extern int flag_no_asm;
 552
 553 /* Nonzero means give string constants the type `const char *', as mandated
 554    by the standard.  */
 555
 556 extern int flag_const_strings;
 557
 558 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 559
 560 extern int flag_signed_bitfields;
 561
 562 /* Warn about #pragma directives that are not recognized.  */
 563
 564 extern int warn_unknown_pragmas; /* Tri state variable.  */
 565
 566 /* Warn about format/argument anomalies in calls to formatted I/O functions
 567    (*printf, *scanf, strftime, strfmon, etc.).  */
 568
 569 extern int warn_format;
 570
 571
 572 /* C/ObjC language option variables.  */
 573
 574
 575 /* Nonzero means allow type mismatches in conditional expressions;
 576    just make their values `void'.  */
 577
 578 extern int flag_cond_mismatch;
 579
 580 /* Nonzero means enable C89 Amendment 1 features.  */
 581
 582 extern int flag_isoc94;
 583
 584 /* Nonzero means use the ISO C99 dialect of C.  */
 585
 586 extern int flag_isoc99;
 587
 588 /* Nonzero means that we have builtin functions, and main is an int.  */
 589
 590 extern int flag_hosted;
 591
 592 /* ObjC language option variables.  */
 593
 594
 595 /* Open and close the file for outputting class declarations, if
 596    requested (ObjC).  */
 597
 598 extern int flag_gen_declaration;
 599
 600 /* Tells the compiler that this is a special run.  Do not perform any
 601    compiling, instead we are to test some platform dependent features
 602    and output a C header file with appropriate definitions.  */
 603
 604 extern int print_struct_values;
 605
 606 /* ???.  Undocumented.  */
 607
 608 extern const char *constant_string_class_name;
 609
 610
 611 /* C++ language option variables.  */
 612
 613
 614 /* Nonzero means don't recognize any extension keywords.  */
 615
 616 extern int flag_no_gnu_keywords;
 617
 618 /* Nonzero means do emit exported implementations of functions even if
 619    they can be inlined.  */
 620
 621 extern int flag_implement_inlines;
 622
 623 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 624
 625 extern int flag_implicit_templates;
 626
 627 /* Nonzero means that implicit instantiations of inline templates will be
 628    emitted if needed, even if instantiations of non-inline templates
 629    aren't.  */
 630
 631 extern int flag_implicit_inline_templates;
 632
 633 /* Nonzero means generate separate instantiation control files and
 634    juggle them at link time.  */
 635
 636 extern int flag_use_repository;
 637
 638 /* Nonzero if we want to issue diagnostics that the standard says are not
 639    required.  */
 640
 641 extern int flag_optional_diags;
 642
 643 /* Nonzero means we should attempt to elide constructors when possible.  */
 644
 645 extern int flag_elide_constructors;
 646
 647 /* Nonzero means that member functions defined in class scope are
 648    inline by default.  */
 649
 650 extern int flag_default_inline;
 651
 652 /* Controls whether compiler generates 'type descriptor' that give
 653    run-time type information.  */
 654
 655 extern int flag_rtti;
 656
 657 /* Nonzero if we want to conserve space in the .o files.  We do this
 658    by putting uninitialized data and runtime initialized data into
 659    .common instead of .data at the expense of not flagging multiple
 660    definitions.  */
 661
 662 extern int flag_conserve_space;
 663
 664 /* Nonzero if we want to obey access control semantics.  */
 665
 666 extern int flag_access_control;
 667
 668 /* Nonzero if we want to check the return value of new and avoid calling
 669    constructors if it is a null pointer.  */
 670
 671 extern int flag_check_new;
 672
 673 /* The supported C++ dialects.  */
 674
 675 enum cxx_dialect {
 676   /* C++98  */
 677   cxx98,
 678   /* Experimental features that are likely to become part of
 679      C++0x.  */
 680   cxx0x
 681 };
 682
 683 /* The C++ dialect being used. C++98 is the default.  */
 684 extern enum cxx_dialect cxx_dialect;
 685
 686 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 687    initialization variables.
 688    0: Old rules, set by -fno-for-scope.
 689    2: New ISO rules, set by -ffor-scope.
 690    1: Try to implement new ISO rules, but with backup compatibility
 691    (and warnings).  This is the default, for now.  */
 692
 693 extern int flag_new_for_scope;
 694
 695 /* Nonzero if we want to emit defined symbols with common-like linkage as
 696    weak symbols where possible, in order to conform to C++ semantics.
 697    Otherwise, emit them as local symbols.  */
 698
 699 extern int flag_weak;
 700
 701 /* 0 means we want the preprocessor to not emit line directives for
 702    the current working directory.  1 means we want it to do it.  -1
 703    means we should decide depending on whether debugging information
 704    is being emitted or not.  */
 705
 706 extern int flag_working_directory;
 707
 708 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 709    destructors for local statics and global objects.  */
 710
 711 extern int flag_use_cxa_atexit;
 712
 713 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
 714    logic.  */
 715
 716 extern int flag_use_cxa_get_exception_ptr;
 717
 718 /* Nonzero means to implement standard semantics for exception
 719    specifications, calling unexpected if an exception is thrown that
 720    doesn't match the specification.  Zero means to treat them as
 721    assertions and optimize accordingly, but not check them.  */
 722
 723 extern int flag_enforce_eh_specs;
 724
 725 /* Nonzero (the default) means to generate thread-safe code for
 726    initializing local statics.  */
 727
 728 extern int flag_threadsafe_statics;
 729
 730 /* Nonzero if we want to pretty-print template specializations as the
 731    template signature followed by the arguments.  */
 732
 733 extern int flag_pretty_templates;
 734
 735 /* Nonzero means warn about implicit declarations.  */
 736
 737 extern int warn_implicit;
 738
 739 /* Warn about using __null (as NULL in C++) as sentinel.  For code compiled
 740    with GCC this doesn't matter as __null is guaranteed to have the right
 741    size.  */
 742
 743 extern int warn_strict_null_sentinel;
 744
 745 /* Maximum template instantiation depth.  This limit is rather
 746    arbitrary, but it exists to limit the time it takes to notice
 747    infinite template instantiations.  */
 748
 749 extern int max_tinst_depth;
 750
 751 /* Nonzero means that we should not issue warnings about problems that
 752    occur when the code is executed, because the code being processed
 753    is not expected to be executed.  This is set during parsing.  This
 754    is used for cases like sizeof() and "0 ? a : b".  This is a count,
 755    not a bool, because unexecuted expressions can nest.  */
 756
 757 extern int c_inhibit_evaluation_warnings;
 758
 759 /* Whether lexing has been completed, so subsequent preprocessor
 760    errors should use the compiler's input_location.  */
 761
 762 extern bool done_lexing;
 763
 764 /* C types are partitioned into three subsets: object, function, and
 765    incomplete types.  */
 766 #define C_TYPE_OBJECT_P(type) \
 767   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 768
 769 #define C_TYPE_INCOMPLETE_P(type) \
 770   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 771
 772 #define C_TYPE_FUNCTION_P(type) \
 773   (TREE_CODE (type) == FUNCTION_TYPE)
 774
 775 /* For convenience we define a single macro to identify the class of
 776    object or incomplete types.  */
 777 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 778   (!C_TYPE_FUNCTION_P (type))
 779
 780 /* Attribute table common to the C front ends.  */
 781 extern const struct attribute_spec c_common_attribute_table[];
 782 extern const struct attribute_spec c_common_format_attribute_table[];
 783
 784 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 785    ID is the identifier to use, NAME is the string.
 786    TYPE_DEP indicates whether it depends on type of the function or not
 787    (i.e. __PRETTY_FUNCTION__).  */
 788
 789 extern tree (*make_fname_decl) (location_t, tree, int);
 790
 791 extern const char *c_addr_space_name (addr_space_t as);
 792 extern tree identifier_global_value (tree);
 793 extern void record_builtin_type (enum rid, const char *, tree);
 794 extern tree build_void_list_node (void);
 795 extern void start_fname_decls (void);
 796 extern void finish_fname_decls (void);
 797 extern const char *fname_as_string (int);
 798 extern tree fname_decl (location_t, unsigned, tree);
 799
 800 extern void check_function_arguments (tree, int, tree *, tree);
 801 extern void check_function_arguments_recurse (void (*)
 802                                               (void *, tree,
 803                                                unsigned HOST_WIDE_INT),
 804                                               void *, tree,
 805                                               unsigned HOST_WIDE_INT);
 806 extern bool check_builtin_function_arguments (tree, int, tree *);
 807 extern void check_function_format (tree, int, tree *);
 808 extern void set_Wformat (int);
 809 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 810 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 811 extern int c_common_handle_option (size_t code, const char *arg, int value);
 812 extern bool c_common_missing_argument (const char *opt, size_t code);
 813 extern tree c_common_type_for_mode (enum machine_mode, int);
 814 extern tree c_common_type_for_size (unsigned int, int);
 815 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
 816                                                 int, int);
 817 extern tree c_common_unsigned_type (tree);
 818 extern tree c_common_signed_type (tree);
 819 extern tree c_common_signed_or_unsigned_type (int, tree);
 820 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
 821 extern bool decl_with_nonnull_addr_p (const_tree);
 822 extern tree c_fully_fold (tree, bool, bool *);
 823 extern tree decl_constant_value_for_optimization (tree);
 824 extern tree c_wrap_maybe_const (tree, bool);
 825 extern tree c_save_expr (tree);
 826 extern tree c_common_truthvalue_conversion (location_t, tree);
 827 extern void c_apply_type_quals_to_decl (int, tree);
 828 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
 829 extern tree c_alignof_expr (location_t, tree);
 830 /* Print an error message for invalid operands to arith operation CODE.
 831    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 832 extern void binary_op_error (location_t, enum tree_code, tree, tree);
 833 extern tree fix_string_type (tree);
 834 struct varray_head_tag;
 835 extern void constant_expression_warning (tree);
 836 extern void constant_expression_error (tree);
 837 extern bool strict_aliasing_warning (tree, tree, tree);
 838 extern void warnings_for_convert_and_check (tree, tree, tree);
 839 extern tree convert_and_check (tree, tree);
 840 extern void overflow_warning (location_t, tree);
 841 extern void warn_logical_operator (location_t, enum tree_code, tree,
 842                                    enum tree_code, tree, enum tree_code, tree);
 843 extern void check_main_parameter_types (tree decl);
 844 extern bool c_determine_visibility (tree);
 845 extern bool same_scalar_type_ignoring_signedness (tree, tree);
 846 extern void mark_valid_location_for_stdc_pragma (bool);
 847 extern bool valid_location_for_stdc_pragma_p (void);
 848 extern void set_float_const_decimal64 (void);
 849 extern void clear_float_const_decimal64 (void);
 850 extern bool float_const_decimal64_p (void);
 851
 852 #define c_sizeof(LOC, T)  c_sizeof_or_alignof_type (LOC, T, true, 1)
 853 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
 854
 855 /* Subroutine of build_binary_op, used for certain operations.  */
 856 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
 857
 858 /* Subroutine of build_binary_op, used for comparison operations.
 859    See if the operands have both been converted from subword integer types
 860    and, if so, perhaps change them both back to their original type.  */
 861 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 862
 863 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
 864
 865 /* Add qualifiers to a type, in the fashion for C.  */
 866 extern tree c_build_qualified_type (tree, int);
 867
 868 /* Build tree nodes and builtin functions common to both C and C++ language
 869    frontends.  */
 870 extern void c_common_nodes_and_builtins (void);
 871
 872 extern void disable_builtin_function (const char *);
 873
 874 extern void set_compound_literal_name (tree decl);
 875
 876 extern tree build_va_arg (location_t, tree, tree);
 877
 878 extern unsigned int c_common_init_options (unsigned int, const char **);
 879 extern bool c_common_post_options (const char **);
 880 extern bool c_common_init (void);
 881 extern void c_common_finish (void);
 882 extern void c_common_parse_file (int);
 883 extern alias_set_type c_common_get_alias_set (tree);
 884 extern void c_register_builtin_type (tree, const char*);
 885 extern bool c_promoting_integer_type_p (const_tree);
 886 extern int self_promoting_args_p (const_tree);
 887 extern tree strip_pointer_operator (tree);
 888 extern tree strip_pointer_or_array_types (tree);
 889 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
 890
 891 /* This is the basic parsing function.  */
 892 extern void c_parse_file (void);
 893 /* This is misnamed, it actually performs end-of-compilation processing.  */
 894 extern void finish_file (void);
 895
 896
 897 /* These macros provide convenient access to the various _STMT nodes.  */
 898
 899 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
 900    if a statement expression.  */
 901 #define STATEMENT_LIST_STMT_EXPR(NODE) \
 902   TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
 903
 904 /* Nonzero if a label has been added to the statement list.  */
 905 #define STATEMENT_LIST_HAS_LABEL(NODE) \
 906   TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
 907
 908 /* C_MAYBE_CONST_EXPR accessors.  */
 909 #define C_MAYBE_CONST_EXPR_PRE(NODE)                    \
 910   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
 911 #define C_MAYBE_CONST_EXPR_EXPR(NODE)                   \
 912   TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
 913 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE)           \
 914   TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 915 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE)              \
 916   TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
 917 #define EXPR_INT_CONST_OPERANDS(EXPR)                   \
 918   (INTEGRAL_TYPE_P (TREE_TYPE (EXPR))                   \
 919    && (TREE_CODE (EXPR) == INTEGER_CST                  \
 920        || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR       \
 921            && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
 922
 923 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
 924 #define DECL_C_BIT_FIELD(NODE) \
 925   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
 926 #define SET_DECL_C_BIT_FIELD(NODE) \
 927   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
 928 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
 929   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
 930
 931 extern tree do_case (location_t, tree, tree);
 932 extern tree build_stmt (location_t, enum tree_code, ...);
 933 extern tree build_case_label (location_t, tree, tree, tree);
 934
 935 /* These functions must be defined by each front-end which implements
 936    a variant of the C language.  They are used in c-common.c.  */
 937
 938 extern tree build_unary_op (location_t, enum tree_code, tree, int);
 939 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
 940 extern tree perform_integral_promotions (tree);
 941
 942 /* These functions must be defined by each front-end which implements
 943    a variant of the C language.  They are used by port files.  */
 944
 945 extern tree default_conversion (tree);
 946
 947 /* Given two integer or real types, return the type for their sum.
 948    Given two compatible ANSI C types, returns the merged type.  */
 949
 950 extern tree common_type (tree, tree);
 951
 952 extern tree decl_constant_value (tree);
 953
 954 /* Handle increment and decrement of boolean types.  */
 955 extern tree boolean_increment (enum tree_code, tree);
 956
 957 extern int case_compare (splay_tree_key, splay_tree_key);
 958
 959 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
 960
 961 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
 962
 963 extern tree build_function_call (location_t, tree, tree);
 964
 965 extern tree build_function_call_vec (location_t, tree,
 966                                      VEC(tree,gc) *, VEC(tree,gc) *);
 967
 968 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
 969
 970 extern tree finish_label_address_expr (tree, location_t);
 971
 972 /* Same function prototype, but the C and C++ front ends have
 973    different implementations.  Used in c-common.c.  */
 974 extern tree lookup_label (tree);
 975 extern tree lookup_name (tree);
 976 extern bool lvalue_p (const_tree);
 977
 978 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
 979 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
 980
 981 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
 982
 983 extern void init_c_lex (void);
 984
 985 extern void c_cpp_builtins (cpp_reader *);
 986 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
 987
 988 /* Positive if an implicit `extern "C"' scope has just been entered;
 989    negative if such a scope has just been exited.  */
 990 extern GTY(()) int pending_lang_change;
 991
 992 /* Information recorded about each file examined during compilation.  */
 993
 994 struct c_fileinfo
 995 {
 996   int time;     /* Time spent in the file.  */
 997
 998   /* Flags used only by C++.
 999      INTERFACE_ONLY nonzero means that we are in an "interface" section
1000      of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
1001      the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
1002      INTERFACE_ONLY is zero, it means that we are responsible for
1003      exporting definitions that others might need.  */
1004   short interface_only;
1005   short interface_unknown;
1006 };
1007
1008 struct c_fileinfo *get_fileinfo (const char *);
1009 extern void dump_time_statistics (void);
1010
1011 extern bool c_dump_tree (void *, tree);
1012
1013 extern void verify_sequence_points (tree);
1014
1015 extern tree fold_offsetof (tree, tree);
1016
1017 /* Places where an lvalue, or modifiable lvalue, may be required.
1018    Used to select diagnostic messages in lvalue_error and
1019    readonly_error.  */
1020 enum lvalue_use {
1021   lv_assign,
1022   lv_increment,
1023   lv_decrement,
1024   lv_addressof,
1025   lv_asm
1026 };
1027
1028 extern void lvalue_error (enum lvalue_use);
1029
1030 extern int complete_array_type (tree *, tree, bool);
1031
1032 extern tree builtin_type_for_size (int, bool);
1033
1034 extern void warn_array_subscript_with_type_char (tree);
1035 extern void warn_about_parentheses (enum tree_code,
1036                                     enum tree_code, tree,
1037                                     enum tree_code, tree);
1038 extern void warn_for_unused_label (tree label);
1039 extern void warn_for_div_by_zero (location_t, tree divisor);
1040 extern void warn_for_sign_compare (location_t,
1041                                    tree orig_op0, tree orig_op1,
1042                                    tree op0, tree op1,
1043                                    tree result_type,
1044                                    enum tree_code resultcode);
1045 extern void set_underlying_type (tree x);
1046 extern bool is_typedef_decl (tree x);
1047 extern VEC(tree,gc) *make_tree_vector (void);
1048 extern void release_tree_vector (VEC(tree,gc) *);
1049 extern VEC(tree,gc) *make_tree_vector_single (tree);
1050 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
1051
1052 /* In c-gimplify.c  */
1053 extern void c_genericize (tree);
1054 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1055 extern tree c_build_bind_expr (location_t, tree, tree);
1056
1057 /* In c-pch.c  */
1058 extern void pch_init (void);
1059 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1060 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1061                                const char *orig);
1062 extern void c_common_write_pch (void);
1063 extern void c_common_no_more_pch (void);
1064 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1065 extern void c_common_print_pch_checksum (FILE *f);
1066
1067 /* In *-checksum.c */
1068 extern const unsigned char executable_checksum[16];
1069
1070 /* In c-cppbuiltin.c  */
1071 extern void builtin_define_std (const char *macro);
1072 extern void builtin_define_with_value (const char *, const char *, int);
1073 extern void c_stddef_cpp_builtins (void);
1074 extern void fe_file_change (const struct line_map *);
1075 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1076
1077 /* Objective-C / Objective-C++ entry points.  */
1078
1079 /* The following ObjC/ObjC++ functions are called by the C and/or C++
1080    front-ends; they all must have corresponding stubs in stub-objc.c.  */
1081 extern tree objc_is_class_name (tree);
1082 extern tree objc_is_object_ptr (tree);
1083 extern void objc_check_decl (tree);
1084 extern int objc_is_reserved_word (tree);
1085 extern bool objc_compare_types (tree, tree, int, tree);
1086 extern void objc_volatilize_decl (tree);
1087 extern bool objc_type_quals_match (tree, tree);
1088 extern tree objc_rewrite_function_call (tree, tree);
1089 extern tree objc_message_selector (void);
1090 extern tree objc_lookup_ivar (tree, tree);
1091 extern void objc_clear_super_receiver (void);
1092 extern int objc_is_public (tree, tree);
1093 extern tree objc_is_id (tree);
1094 extern void objc_declare_alias (tree, tree);
1095 extern void objc_declare_class (tree);
1096 extern void objc_declare_protocols (tree);
1097 extern tree objc_build_message_expr (tree);
1098 extern tree objc_finish_message_expr (tree, tree, tree);
1099 extern tree objc_build_selector_expr (location_t, tree);
1100 extern tree objc_build_protocol_expr (tree);
1101 extern tree objc_build_encode_expr (tree);
1102 extern tree objc_build_string_object (tree);
1103 extern tree objc_get_protocol_qualified_type (tree, tree);
1104 extern tree objc_get_class_reference (tree);
1105 extern tree objc_get_class_ivars (tree);
1106 extern void objc_start_class_interface (tree, tree, tree);
1107 extern void objc_start_category_interface (tree, tree, tree);
1108 extern void objc_start_protocol (tree, tree);
1109 extern void objc_continue_interface (void);
1110 extern void objc_finish_interface (void);
1111 extern void objc_start_class_implementation (tree, tree);
1112 extern void objc_start_category_implementation (tree, tree);
1113 extern void objc_continue_implementation (void);
1114 extern void objc_finish_implementation (void);
1115 extern void objc_set_visibility (int);
1116 extern void objc_set_method_type (enum tree_code);
1117 extern tree objc_build_method_signature (tree, tree, tree, bool);
1118 extern void objc_add_method_declaration (tree);
1119 extern void objc_start_method_definition (tree);
1120 extern void objc_finish_method_definition (tree);
1121 extern void objc_add_instance_variable (tree);
1122 extern tree objc_build_keyword_decl (tree, tree, tree);
1123 extern tree objc_build_throw_stmt (location_t, tree);
1124 extern void objc_begin_try_stmt (location_t, tree);
1125 extern tree objc_finish_try_stmt (void);
1126 extern void objc_begin_catch_clause (tree);
1127 extern void objc_finish_catch_clause (void);
1128 extern void objc_build_finally_clause (location_t, tree);
1129 extern tree objc_build_synchronized (location_t, tree, tree);
1130 extern int objc_static_init_needed_p (void);
1131 extern tree objc_generate_static_init_call (tree);
1132 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1133
1134 /* The following are provided by the C and C++ front-ends, and called by
1135    ObjC/ObjC++.  */
1136 extern void *objc_get_current_scope (void);
1137 extern void objc_mark_locals_volatile (void *);
1138
1139 /* In c-ppoutput.c  */
1140 extern void init_pp_output (FILE *);
1141 extern void preprocess_file (cpp_reader *);
1142 extern void pp_file_change (const struct line_map *);
1143 extern void pp_dir_change (cpp_reader *, const char *);
1144 extern bool check_missing_format_attribute (tree, tree);
1145
1146 /* In c-omp.c  */
1147 extern tree c_finish_omp_master (location_t, tree);
1148 extern tree c_finish_omp_critical (location_t, tree, tree);
1149 extern tree c_finish_omp_ordered (location_t, tree);
1150 extern void c_finish_omp_barrier (location_t);
1151 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
1152 extern void c_finish_omp_flush (location_t);
1153 extern void c_finish_omp_taskwait (location_t);
1154 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1155 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1156 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1157
1158 /* Not in c-omp.c; provided by the front end.  */
1159 extern bool c_omp_sharing_predetermined (tree);
1160 extern tree c_omp_remap_decl (tree, bool);
1161 extern void record_types_used_by_current_var_decl (tree);
1162
1163 /* In order for the format checking to accept the C frontend
1164    diagnostic framework extensions, you must include this file before
1165    toplev.h, not after.  The C front end formats are a subset of those
1166    for C++, so they are the appropriate set to use in common code;
1167    cp-tree.h overrides this for C++.  */
1168 #ifndef GCC_DIAG_STYLE
1169 #define GCC_DIAG_STYLE __gcc_cdiag__
1170 #endif
1171
1172 #endif /* ! GCC_C_COMMON_H */