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