gcc/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
   3    1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 #ifndef GCC_C_COMMON_H
  23 #define GCC_C_COMMON_H
  24
  25 #include "splay-tree.h"
  26 #include "cpplib.h"
  27
  28 /* Usage of TREE_LANG_FLAG_?:
  29    0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
  30       TREE_NEGATED_INT (in INTEGER_CST).
  31       IDENTIFIER_MARKED (used by search routines).
  32       SCOPE_BEGIN_P (in SCOPE_STMT)
  33       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  34       NEW_FOR_SCOPE_P (in FOR_STMT)
  35       ASM_INPUT_P (in ASM_STMT)
  36       STMT_EXPR_NO_SCOPE (in STMT_EXPR)
  37    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  38       STMT_IS_FULL_EXPR_P (in _STMT)
  39    2: STMT_LINENO_FOR_FN_P (in _STMT)
  40    3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
  41       COMPOUND_STMT_BODY_BLOCK (in COMPOUND_STMT)
  42    4: SCOPE_PARTIAL_P (in SCOPE_STMT)
  43 */
  44
  45 /* Reserved identifiers.  This is the union of all the keywords for C,
  46    C++, and Objective C.  All the type modifiers have to be in one
  47    block at the beginning, because they are used as mask bits.  There
  48    are 27 type modifiers; if we add many more we will have to redesign
  49    the mask mechanism.  */
  50
  51 enum rid
  52 {
  53   /* Modifiers: */
  54   /* C, in empirical order of frequency.  */
  55   RID_STATIC = 0,
  56   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  57   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  58   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  59
  60   /* C extensions */
  61   RID_BOUNDED, RID_UNBOUNDED, RID_COMPLEX, RID_THREAD,
  62
  63   /* C++ */
  64   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  65
  66   /* ObjC */
  67   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  68
  69   /* C */
  70   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  71   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  72   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  73   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  74   RID_SIZEOF,
  75
  76   /* C extensions */
  77   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
  78   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_PTRBASE,
  79   RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
  80
  81   /* Too many ways of getting the name of a function as a string */
  82   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
  83
  84   /* C++ */
  85   RID_BOOL,     RID_WCHAR,    RID_CLASS,
  86   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
  87   RID_TEMPLATE, RID_NULL,     RID_CATCH,
  88   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
  89   RID_NEW,      RID_OPERATOR, RID_THIS,
  90   RID_THROW,    RID_TRUE,     RID_TRY,
  91   RID_TYPENAME, RID_TYPEID,   RID_USING,
  92
  93   /* casts */
  94   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
  95
  96   /* Objective C */
  97   RID_ID,          RID_AT_ENCODE,    RID_AT_END,
  98   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
  99   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 100   RID_AT_PROTOCOL, RID_AT_SELECTOR,  RID_AT_INTERFACE,
 101   RID_AT_IMPLEMENTATION,
 102
 103   RID_MAX,
 104
 105   RID_FIRST_MODIFIER = RID_STATIC,
 106   RID_LAST_MODIFIER = RID_ONEWAY,
 107
 108   RID_FIRST_AT = RID_AT_ENCODE,
 109   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 110   RID_FIRST_PQ = RID_IN,
 111   RID_LAST_PQ = RID_ONEWAY
 112 };
 113
 114 #define OBJC_IS_AT_KEYWORD(rid) \
 115   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
 116    (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
 117
 118 #define OBJC_IS_PQ_KEYWORD(rid) \
 119   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
 120    (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
 121
 122 /* The elements of `ridpointers' are identifier nodes for the reserved
 123    type names and storage classes.  It is indexed by a RID_... value.  */
 124 extern tree *ridpointers;
 125
 126 /* Standard named or nameless data types of the C compiler.  */
 127
 128 enum c_tree_index
 129 {
 130     CTI_WCHAR_TYPE,
 131     CTI_SIGNED_WCHAR_TYPE,
 132     CTI_UNSIGNED_WCHAR_TYPE,
 133     CTI_WINT_TYPE,
 134     CTI_C_SIZE_TYPE, /* The type used for the size_t typedef and the
 135                         result type of sizeof (an ordinary type without
 136                         TYPE_IS_SIZETYPE set, unlike the internal
 137                         sizetype).  */
 138     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 139     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 140     CTI_INTMAX_TYPE,
 141     CTI_UINTMAX_TYPE,
 142     CTI_WIDEST_INT_LIT_TYPE,
 143     CTI_WIDEST_UINT_LIT_TYPE,
 144
 145     CTI_CHAR_ARRAY_TYPE,
 146     CTI_WCHAR_ARRAY_TYPE,
 147     CTI_INT_ARRAY_TYPE,
 148     CTI_STRING_TYPE,
 149     CTI_CONST_STRING_TYPE,
 150
 151     /* Type for boolean expressions (bool in C++, int in C).  */
 152     CTI_BOOLEAN_TYPE,
 153     CTI_BOOLEAN_TRUE,
 154     CTI_BOOLEAN_FALSE,
 155     /* C99's _Bool type.  */
 156     CTI_C_BOOL_TYPE,
 157     CTI_C_BOOL_TRUE,
 158     CTI_C_BOOL_FALSE,
 159     CTI_DEFAULT_FUNCTION_TYPE,
 160
 161     CTI_G77_INTEGER_TYPE,
 162     CTI_G77_UINTEGER_TYPE,
 163     CTI_G77_LONGINT_TYPE,
 164     CTI_G77_ULONGINT_TYPE,
 165
 166     /* These are not types, but we have to look them up all the time.  */
 167     CTI_FUNCTION_NAME_DECL,
 168     CTI_PRETTY_FUNCTION_NAME_DECL,
 169     CTI_C99_FUNCTION_NAME_DECL,
 170     CTI_SAVED_FUNCTION_NAME_DECLS,
 171
 172     CTI_VOID_ZERO,
 173
 174     CTI_MAX
 175 };
 176
 177 #define C_RID_CODE(id)  (((struct c_common_identifier *) (id))->node.rid_code)
 178
 179 /* Identifier part common to the C front ends.  Inherits from
 180    tree_identifier, despite appearances.  */
 181 struct c_common_identifier GTY(())
 182 {
 183   struct tree_common common;
 184   struct cpp_hashnode GTY ((skip (""))) node;
 185 };
 186
 187 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 188 #define signed_wchar_type_node          c_global_trees[CTI_SIGNED_WCHAR_TYPE]
 189 #define unsigned_wchar_type_node        c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
 190 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 191 #define c_size_type_node                c_global_trees[CTI_C_SIZE_TYPE]
 192 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 193 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 194 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 195 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 196 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 197 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 198
 199 #define boolean_type_node               c_global_trees[CTI_BOOLEAN_TYPE]
 200 #define boolean_true_node               c_global_trees[CTI_BOOLEAN_TRUE]
 201 #define boolean_false_node              c_global_trees[CTI_BOOLEAN_FALSE]
 202
 203 #define c_bool_type_node                c_global_trees[CTI_C_BOOL_TYPE]
 204 #define c_bool_true_node                c_global_trees[CTI_C_BOOL_TRUE]
 205 #define c_bool_false_node               c_global_trees[CTI_C_BOOL_FALSE]
 206
 207 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 208 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 209 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 210 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 211 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 212
 213 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 214
 215 /* g77 integer types, which which must be kept in sync with f/com.h */
 216 #define g77_integer_type_node           c_global_trees[CTI_G77_INTEGER_TYPE]
 217 #define g77_uinteger_type_node          c_global_trees[CTI_G77_UINTEGER_TYPE]
 218 #define g77_longint_type_node           c_global_trees[CTI_G77_LONGINT_TYPE]
 219 #define g77_ulongint_type_node          c_global_trees[CTI_G77_ULONGINT_TYPE]
 220
 221 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 222 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 223 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 224 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 225
 226 /* A node for `((void) 0)'.  */
 227 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 228
 229 extern GTY(()) tree c_global_trees[CTI_MAX];
 230
 231 /* Mark which labels are explicitly declared.
 232    These may be shadowed, and may be referenced from nested functions.  */
 233 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 234
 235 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
 236    warning if they undergo concatenation.  */
 237 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
 238
 239 typedef enum c_language_kind
 240 {
 241   clk_c = 0,      /* A dialect of C: K&R C, ANSI/ISO C89, C2000, etc.  */
 242   clk_cplusplus   /* ANSI/ISO C++ */
 243 }
 244 c_language_kind;
 245
 246 /* Information about a statement tree.  */
 247
 248 struct stmt_tree_s GTY(()) {
 249   /* The last statement added to the tree.  */
 250   tree x_last_stmt;
 251   /* The type of the last expression statement.  (This information is
 252      needed to implement the statement-expression extension.)  */
 253   tree x_last_expr_type;
 254   /* The last filename we recorded.  */
 255   const char *x_last_expr_filename;
 256   /* In C++, Non-zero if we should treat statements as full
 257      expressions.  In particular, this variable is no-zero if at the
 258      end of a statement we should destroy any temporaries created
 259      during that statement.  Similarly, if, at the end of a block, we
 260      should destroy any local variables in this block.  Normally, this
 261      variable is non-zero, since those are the normal semantics of
 262      C++.
 263
 264      However, in order to represent aggregate initialization code as
 265      tree structure, we use statement-expressions.  The statements
 266      within the statement expression should not result in cleanups
 267      being run until the entire enclosing statement is complete.
 268
 269      This flag has no effect in C.  */
 270   int stmts_are_full_exprs_p;
 271 };
 272
 273 typedef struct stmt_tree_s *stmt_tree;
 274
 275 /* Global state pertinent to the current function.  Some C dialects
 276    extend this structure with additional fields.  */
 277
 278 struct c_language_function GTY(()) {
 279   /* While we are parsing the function, this contains information
 280      about the statement-tree that we are building.  */
 281   struct stmt_tree_s x_stmt_tree;
 282   /* The stack of SCOPE_STMTs for the current function.  */
 283   tree x_scope_stmt_stack;
 284 };
 285
 286 /* When building a statement-tree, this is the last statement added to
 287    the tree.  */
 288
 289 #define last_tree (current_stmt_tree ()->x_last_stmt)
 290
 291 /* The type of the last expression-statement we have seen.  */
 292
 293 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
 294
 295 /* The name of the last file we have seen.  */
 296
 297 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
 298
 299 /* LAST_TREE contains the last statement parsed.  These are chained
 300    together through the TREE_CHAIN field, but often need to be
 301    re-organized since the parse is performed bottom-up.  This macro
 302    makes LAST_TREE the indicated SUBSTMT of STMT.  */
 303
 304 #define RECHAIN_STMTS(stmt, substmt)            \
 305   do {                                          \
 306     substmt = TREE_CHAIN (stmt);                \
 307     TREE_CHAIN (stmt) = NULL_TREE;              \
 308     last_tree = stmt;                           \
 309   } while (0)
 310
 311 /* Language-specific hooks.  */
 312
 313 extern int (*lang_statement_code_p)             PARAMS ((enum tree_code));
 314 extern void (*lang_expand_stmt)                 PARAMS ((tree));
 315 extern void (*lang_expand_decl_stmt)            PARAMS ((tree));
 316 extern void (*lang_expand_function_end)         PARAMS ((void));
 317 extern tree gettags                             PARAMS ((void));
 318
 319 /* Callback that determines if it's ok for a function to have no
 320    noreturn attribute.  */
 321 extern int (*lang_missing_noreturn_ok_p)        PARAMS ((tree));
 322
 323 extern int yyparse                              PARAMS ((void));
 324 extern void free_parser_stacks                  PARAMS ((void));
 325
 326 extern stmt_tree current_stmt_tree              PARAMS ((void));
 327 extern tree *current_scope_stmt_stack           PARAMS ((void));
 328 extern void begin_stmt_tree                     PARAMS ((tree *));
 329 extern tree add_stmt                            PARAMS ((tree));
 330 extern void add_decl_stmt                       PARAMS ((tree));
 331 extern tree add_scope_stmt                      PARAMS ((int, int));
 332 extern void finish_stmt_tree                    PARAMS ((tree *));
 333
 334 extern int statement_code_p                     PARAMS ((enum tree_code));
 335 extern tree walk_stmt_tree                      PARAMS ((tree *,
 336                                                          walk_tree_fn,
 337                                                          void *));
 338 extern void prep_stmt                           PARAMS ((tree));
 339 extern void expand_stmt                         PARAMS ((tree));
 340 extern void shadow_warning                      PARAMS ((const char *,
 341                                                          tree, tree));
 342 extern tree c_begin_if_stmt                     PARAMS ((void));
 343 extern tree c_begin_while_stmt                  PARAMS ((void));
 344 extern void c_finish_while_stmt_cond            PARAMS ((tree, tree));
 345
 346
 347 /* Extra information associated with a DECL.  Other C dialects extend
 348    this structure in various ways.  The C front-end only uses this
 349    structure for FUNCTION_DECLs; all other DECLs have a NULL
 350    DECL_LANG_SPECIFIC field.  */
 351
 352 struct c_lang_decl GTY(()) {
 353   unsigned declared_inline : 1;
 354 };
 355
 356 /* In a FUNCTION_DECL for which DECL_BUILT_IN does not hold, this is
 357      the approximate number of statements in this function.  There is
 358      no need for this number to be exact; it is only used in various
 359      heuristics regarding optimization.  */
 360 #define DECL_NUM_STMTS(NODE) \
 361   (FUNCTION_DECL_CHECK (NODE)->decl.u1.i)
 362
 363 /* The variant of the C language being processed.  Each C language
 364    front-end defines this variable.  */
 365
 366 extern c_language_kind c_language;
 367
 368 /* Switches common to the C front ends.  */
 369
 370 /* Nonzero if prepreprocessing only.  */
 371 extern int flag_preprocess_only;
 372
 373 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 374    user's namespace.  */
 375 extern int flag_iso;
 376
 377 /* Nonzero whenever Objective-C functionality is being used.  */
 378 extern int flag_objc;
 379
 380 /* Nonzero if -undef was given.  It suppresses target built-in macros
 381    and assertions.  */
 382 extern int flag_undef;
 383
 384 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 385
 386 extern int flag_no_builtin;
 387
 388 /* Nonzero means don't recognize the non-ANSI builtin functions.
 389    -ansi sets this.  */
 390
 391 extern int flag_no_nonansi_builtin;
 392
 393 /* Nonzero means give `double' the same size as `float'.  */
 394
 395 extern int flag_short_double;
 396
 397 /* Nonzero means give `wchar_t' the same size as `short'.  */
 398
 399 extern int flag_short_wchar;
 400
 401 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 402 extern int flag_ms_extensions;
 403
 404 /* Nonzero means don't recognize the keyword `asm'.  */
 405
 406 extern int flag_no_asm;
 407
 408 /* Nonzero means give string constants the type `const char *', as mandated
 409    by the standard.  */
 410
 411 extern int flag_const_strings;
 412
 413 /* Nonzero means `$' can be in an identifier.  */
 414
 415 extern int dollars_in_ident;
 416
 417 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 418
 419 extern int flag_signed_bitfields;
 420 extern int explicit_flag_signed_bitfields;
 421
 422 /* Nonzero means warn about pointer casts that can drop a type qualifier
 423    from the pointer target type.  */
 424
 425 extern int warn_cast_qual;
 426
 427 /* Warn about functions which might be candidates for format attributes.  */
 428
 429 extern int warn_missing_format_attribute;
 430
 431 /* Nonzero means warn about sizeof(function) or addition/subtraction
 432    of function pointers.  */
 433
 434 extern int warn_pointer_arith;
 435
 436 /* Nonzero means warn for any global function def
 437    without separate previous prototype decl.  */
 438
 439 extern int warn_missing_prototypes;
 440
 441 /* Warn if adding () is suggested.  */
 442
 443 extern int warn_parentheses;
 444
 445 /* Warn if initializer is not completely bracketed.  */
 446
 447 extern int warn_missing_braces;
 448
 449 /* Warn about comparison of signed and unsigned values.
 450    If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified.  */
 451
 452 extern int warn_sign_compare;
 453
 454 /* Nonzero means warn about usage of long long when `-pedantic'.  */
 455
 456 extern int warn_long_long;
 457
 458 /* Nonzero means warn about deprecated conversion from string constant to
 459    `char *'.  */
 460
 461 extern int warn_write_strings;
 462
 463 /* Nonzero means warn about multiple (redundant) decls for the same single
 464    variable or function.  */
 465
 466 extern int warn_redundant_decls;
 467
 468 /* Warn about testing equality of floating point numbers.  */
 469
 470 extern int warn_float_equal;
 471
 472 /* Warn about a subscript that has type char.  */
 473
 474 extern int warn_char_subscripts;
 475
 476 /* Warn if a type conversion is done that might have confusing results.  */
 477
 478 extern int warn_conversion;
 479
 480 /* Warn about #pragma directives that are not recognized.  */
 481
 482 extern int warn_unknown_pragmas; /* Tri state variable.  */
 483
 484 /* Warn about format/argument anomalies in calls to formatted I/O functions
 485    (*printf, *scanf, strftime, strfmon, etc.).  */
 486
 487 extern int warn_format;
 488
 489 /* Warn about Y2K problems with strftime formats.  */
 490
 491 extern int warn_format_y2k;
 492
 493 /* Warn about excess arguments to formats.  */
 494
 495 extern int warn_format_extra_args;
 496
 497 /* Warn about zero-length formats.  */
 498
 499 extern int warn_format_zero_length;
 500
 501 /* Warn about non-literal format arguments.  */
 502
 503 extern int warn_format_nonliteral;
 504
 505 /* Warn about possible security problems with calls to format functions.  */
 506
 507 extern int warn_format_security;
 508
 509
 510 /* C/ObjC language option variables.  */
 511
 512
 513 /* Nonzero means message about use of implicit function declarations;
 514  1 means warning; 2 means error.  */
 515
 516 extern int mesg_implicit_function_declaration;
 517
 518 /* Nonzero means allow type mismatches in conditional expressions;
 519    just make their values `void'.  */
 520
 521 extern int flag_cond_mismatch;
 522
 523 /* Nonzero means enable C89 Amendment 1 features.  */
 524
 525 extern int flag_isoc94;
 526
 527 /* Nonzero means use the ISO C99 dialect of C.  */
 528
 529 extern int flag_isoc99;
 530
 531 /* Nonzero means that we have builtin functions, and main is an int */
 532
 533 extern int flag_hosted;
 534
 535 /* Nonzero means add default format_arg attributes for functions not
 536    in ISO C.  */
 537
 538 extern int flag_noniso_default_format_attributes;
 539
 540 /* Nonzero means warn when casting a function call to a type that does
 541    not match the return type (e.g. (float)sqrt() or (anything*)malloc()
 542    when there is no previous declaration of sqrt or malloc.  */
 543
 544 extern int warn_bad_function_cast;
 545
 546 /* Warn about traditional constructs whose meanings changed in ANSI C.  */
 547
 548 extern int warn_traditional;
 549
 550 /* Nonzero means warn for non-prototype function decls
 551    or non-prototyped defs without previous prototype.  */
 552
 553 extern int warn_strict_prototypes;
 554
 555 /* Nonzero means warn for any global function def
 556    without separate previous decl.  */
 557
 558 extern int warn_missing_declarations;
 559
 560 /* Nonzero means warn about extern declarations of objects not at
 561    file-scope level and about *all* declarations of functions (whether
 562    extern or static) not at file-scope level.  Note that we exclude
 563    implicit function declarations.  To get warnings about those, use
 564    -Wimplicit.  */
 565
 566 extern int warn_nested_externs;
 567
 568 /* Warn if main is suspicious.  */
 569
 570 extern int warn_main;
 571
 572 /* Nonzero means warn about possible violations of sequence point rules.  */
 573
 574 extern int warn_sequence_point;
 575
 576 /* Nonzero means to warn about compile-time division by zero.  */
 577 extern int warn_div_by_zero;
 578
 579 /* Nonzero means warn about use of implicit int.  */
 580
 581 extern int warn_implicit_int;
 582
 583 /* Warn about NULL being passed to argument slots marked as requiring
 584    non-NULL.  */
 585
 586 extern int warn_nonnull;
 587
 588
 589 /* ObjC language option variables.  */
 590
 591
 592 /* Open and close the file for outputting class declarations, if
 593    requested (ObjC).  */
 594
 595 extern int flag_gen_declaration;
 596
 597 /* Generate code for GNU or NeXT runtime environment.  */
 598
 599 extern int flag_next_runtime;
 600
 601 /* Tells the compiler that this is a special run.  Do not perform any
 602    compiling, instead we are to test some platform dependent features
 603    and output a C header file with appropriate definitions.  */
 604
 605 extern int print_struct_values;
 606
 607 /* ???.  Undocumented.  */
 608
 609 extern const char *constant_string_class_name;
 610
 611 /* Warn if multiple methods are seen for the same selector, but with
 612    different argument types.  Performs the check on the whole selector
 613    table at the end of compilation.  */
 614
 615 extern int warn_selector;
 616
 617 /* Warn if a @selector() is found, and no method with that selector
 618    has been previously declared.  The check is done on each
 619    @selector() as soon as it is found - so it warns about forward
 620    declarations.  */
 621
 622 extern int warn_undeclared_selector;
 623
 624 /* Warn if methods required by a protocol are not implemented in the
 625    class adopting it.  When turned off, methods inherited to that
 626    class are also considered implemented.  */
 627
 628 extern int warn_protocol;
 629
 630
 631 /* C++ language option variables.  */
 632
 633
 634 /* Nonzero means don't recognize any extension keywords.  */
 635
 636 extern int flag_no_gnu_keywords;
 637
 638 /* Nonzero means do emit exported implementations of functions even if
 639    they can be inlined.  */
 640
 641 extern int flag_implement_inlines;
 642
 643 /* Nonzero means do emit exported implementations of templates, instead of
 644    multiple static copies in each file that needs a definition.  */
 645
 646 extern int flag_external_templates;
 647
 648 /* Nonzero means that the decision to emit or not emit the implementation of a
 649    template depends on where the template is instantiated, rather than where
 650    it is defined.  */
 651
 652 extern int flag_alt_external_templates;
 653
 654 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 655
 656 extern int flag_implicit_templates;
 657
 658 /* Nonzero means that implicit instantiations of inline templates will be
 659    emitted if needed, even if instantiations of non-inline templates
 660    aren't.  */
 661
 662 extern int flag_implicit_inline_templates;
 663
 664 /* Nonzero means generate separate instantiation control files and
 665    juggle them at link time.  */
 666
 667 extern int flag_use_repository;
 668
 669 /* Nonzero if we want to issue diagnostics that the standard says are not
 670    required.  */
 671
 672 extern int flag_optional_diags;
 673
 674 /* Nonzero means we should attempt to elide constructors when possible.  */
 675
 676 extern int flag_elide_constructors;
 677
 678 /* Nonzero means that member functions defined in class scope are
 679    inline by default.  */
 680
 681 extern int flag_default_inline;
 682
 683 /* Controls whether compiler generates 'type descriptor' that give
 684    run-time type information.  */
 685
 686 extern int flag_rtti;
 687
 688 /* Nonzero if we want to conserve space in the .o files.  We do this
 689    by putting uninitialized data and runtime initialized data into
 690    .common instead of .data at the expense of not flagging multiple
 691    definitions.  */
 692
 693 extern int flag_conserve_space;
 694
 695 /* Nonzero if we want to obey access control semantics.  */
 696
 697 extern int flag_access_control;
 698
 699 /* Nonzero if we want to check the return value of new and avoid calling
 700    constructors if it is a null pointer.  */
 701
 702 extern int flag_check_new;
 703
 704 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 705    initialization variables.
 706    0: Old rules, set by -fno-for-scope.
 707    2: New ISO rules, set by -ffor-scope.
 708    1: Try to implement new ISO rules, but with backup compatibility
 709    (and warnings).  This is the default, for now.  */
 710
 711 extern int flag_new_for_scope;
 712
 713 /* Nonzero if we want to emit defined symbols with common-like linkage as
 714    weak symbols where possible, in order to conform to C++ semantics.
 715    Otherwise, emit them as local symbols.  */
 716
 717 extern int flag_weak;
 718
 719 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 720    destructors for local statics and global objects.  */
 721
 722 extern int flag_use_cxa_atexit;
 723
 724 /* Nonzero means output .vtable_{entry,inherit} for use in doing vtable gc.  */
 725
 726 extern int flag_vtable_gc;
 727
 728 /* Nonzero means make the default pedwarns warnings instead of errors.
 729    The value of this flag is ignored if -pedantic is specified.  */
 730
 731 extern int flag_permissive;
 732
 733 /* Nonzero means to implement standard semantics for exception
 734    specifications, calling unexpected if an exception is thrown that
 735    doesn't match the specification.  Zero means to treat them as
 736    assertions and optimize accordingly, but not check them.  */
 737
 738 extern int flag_enforce_eh_specs;
 739
 740 /* Nonzero means warn about things that will change when compiling
 741    with an ABI-compliant compiler.  */
 742
 743 extern int warn_abi;
 744
 745 /* Nonzero means warn about implicit declarations.  */
 746
 747 extern int warn_implicit;
 748
 749 /* Nonzero means warn when all ctors or dtors are private, and the class
 750    has no friends.  */
 751
 752 extern int warn_ctor_dtor_privacy;
 753
 754 /* Non-zero means warn in function declared in derived class has the
 755    same name as a virtual in the base class, but fails to match the
 756    type signature of any virtual function in the base class.  */
 757
 758 extern int warn_overloaded_virtual;
 759
 760 /* Non-zero means warn when declaring a class that has a non virtual
 761    destructor, when it really ought to have a virtual one.  */
 762
 763 extern int warn_nonvdtor;
 764
 765 /* Non-zero means warn when the compiler will reorder code.  */
 766
 767 extern int warn_reorder;
 768
 769 /* Non-zero means warn when synthesis behavior differs from Cfront's.  */
 770
 771 extern int warn_synth;
 772
 773 /* Non-zero means warn when we convert a pointer to member function
 774    into a pointer to (void or function).  */
 775
 776 extern int warn_pmf2ptr;
 777
 778 /* Nonzero means warn about violation of some Effective C++ style rules.  */
 779
 780 extern int warn_ecpp;
 781
 782 /* Nonzero means warn where overload resolution chooses a promotion from
 783    unsigned to signed over a conversion to an unsigned of the same size.  */
 784
 785 extern int warn_sign_promo;
 786
 787 /* Nonzero means warn when an old-style cast is used.  */
 788
 789 extern int warn_old_style_cast;
 790
 791 /* Nonzero means warn when non-templatized friend functions are
 792    declared within a template */
 793
 794 extern int warn_nontemplate_friend;
 795
 796 /* Nonzero means complain about deprecated features.  */
 797
 798 extern int warn_deprecated;
 799
 800 /* Maximum template instantiation depth.  This limit is rather
 801    arbitrary, but it exists to limit the time it takes to notice
 802    infinite template instantiations.  */
 803
 804 extern int max_tinst_depth;
 805
 806 /* Nonzero means the expression being parsed will never be evaluated.
 807    This is a count, since unevaluated expressions can nest.  */
 808
 809 extern int skip_evaluation;
 810
 811 /* C types are partitioned into three subsets: object, function, and
 812    incomplete types.  */
 813 #define C_TYPE_OBJECT_P(type) \
 814   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 815
 816 #define C_TYPE_INCOMPLETE_P(type) \
 817   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 818
 819 #define C_TYPE_FUNCTION_P(type) \
 820   (TREE_CODE (type) == FUNCTION_TYPE)
 821
 822 /* For convenience we define a single macro to identify the class of
 823    object or incomplete types.  */
 824 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 825   (!C_TYPE_FUNCTION_P (type))
 826
 827 /* Record in each node resulting from a binary operator
 828    what operator was specified for it.  */
 829 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
 830
 831 /* Attribute table common to the C front ends.  */
 832 extern const struct attribute_spec c_common_attribute_table[];
 833 extern const struct attribute_spec c_common_format_attribute_table[];
 834
 835 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 836    ID is the identifier to use, NAME is the string.
 837    TYPE_DEP indicates whether it depends on type of the function or not
 838    (i.e. __PRETTY_FUNCTION__).  */
 839
 840 extern tree (*make_fname_decl)                  PARAMS ((tree, int));
 841
 842 extern tree identifier_global_value             PARAMS ((tree));
 843 extern void record_builtin_type                 PARAMS ((enum rid,
 844                                                          const char *, tree));
 845 extern tree build_void_list_node                PARAMS ((void));
 846 extern void start_fname_decls                   PARAMS ((void));
 847 extern void finish_fname_decls                  PARAMS ((void));
 848 extern const char *fname_as_string              PARAMS ((int));
 849 extern tree fname_decl                          PARAMS ((unsigned, tree));
 850 extern const char *fname_string                 PARAMS ((unsigned));
 851
 852 extern void check_function_arguments            PARAMS ((tree, tree));
 853 extern void check_function_arguments_recurse    PARAMS ((void (*) (void *,
 854                                                                    tree,
 855                                                                    unsigned HOST_WIDE_INT),
 856                                                          void *, tree,
 857                                                          unsigned HOST_WIDE_INT));
 858 extern void check_function_format               PARAMS ((int *, tree, tree));
 859 extern void set_Wformat                         PARAMS ((int));
 860 extern tree handle_format_attribute             PARAMS ((tree *, tree, tree,
 861                                                          int, bool *));
 862 extern tree handle_format_arg_attribute         PARAMS ((tree *, tree, tree,
 863                                                          int, bool *));
 864 extern void c_common_insert_default_attributes  PARAMS ((tree));
 865 extern int c_common_decode_option               PARAMS ((int, char **));
 866 extern tree c_common_type_for_mode              PARAMS ((enum machine_mode,
 867                                                          int));
 868 extern tree c_common_type_for_size              PARAMS ((unsigned int, int));
 869 extern tree c_common_unsigned_type              PARAMS ((tree));
 870 extern tree c_common_signed_type                PARAMS ((tree));
 871 extern tree c_common_signed_or_unsigned_type    PARAMS ((int, tree));
 872 extern tree c_common_truthvalue_conversion      PARAMS ((tree));
 873 extern void c_apply_type_quals_to_decl          PARAMS ((int, tree));
 874 extern tree c_sizeof_or_alignof_type    PARAMS ((tree, enum tree_code, int));
 875 extern tree c_alignof_expr                      PARAMS ((tree));
 876 /* Print an error message for invalid operands to arith operation CODE.
 877    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 878 extern void binary_op_error                     PARAMS ((enum tree_code));
 879 #define my_friendly_assert(EXP, N) (void) \
 880  (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
 881
 882 extern tree c_expand_expr_stmt                  PARAMS ((tree));
 883 extern void c_expand_start_cond                 PARAMS ((tree, int, tree));
 884 extern void c_finish_then                       PARAMS ((void));
 885 extern void c_expand_start_else                 PARAMS ((void));
 886 extern void c_finish_else                       PARAMS ((void));
 887 extern void c_expand_end_cond                   PARAMS ((void));
 888 /* Validate the expression after `case' and apply default promotions.  */
 889 extern tree check_case_value                    PARAMS ((tree));
 890 extern tree fix_string_type                     PARAMS ((tree));
 891 struct varray_head_tag;
 892 extern tree combine_strings             PARAMS ((struct varray_head_tag *));
 893 extern void constant_expression_warning         PARAMS ((tree));
 894 extern tree convert_and_check                   PARAMS ((tree, tree));
 895 extern void overflow_warning                    PARAMS ((tree));
 896 extern void unsigned_conversion_warning         PARAMS ((tree, tree));
 897
 898 /* Read the rest of the current #-directive line.  */
 899 extern char *get_directive_line                 PARAMS ((void));
 900 #define GET_DIRECTIVE_LINE() get_directive_line ()
 901 #define c_sizeof(T)  c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
 902 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
 903
 904 /* Subroutine of build_binary_op, used for comparison operations.
 905    See if the operands have both been converted from subword integer types
 906    and, if so, perhaps change them both back to their original type.  */
 907 extern tree shorten_compare                     PARAMS ((tree *, tree *, tree *, enum tree_code *));
 908
 909 extern tree pointer_int_sum                     PARAMS ((enum tree_code, tree, tree));
 910 extern unsigned int min_precision               PARAMS ((tree, int));
 911
 912 /* Add qualifiers to a type, in the fashion for C.  */
 913 extern tree c_build_qualified_type              PARAMS ((tree, int));
 914
 915 /* Build tree nodes and builtin functions common to both C and C++ language
 916    frontends.  */
 917 extern void c_common_nodes_and_builtins         PARAMS ((void));
 918
 919 extern void disable_builtin_function            PARAMS ((const char *));
 920
 921 extern tree build_va_arg                        PARAMS ((tree, tree));
 922
 923 extern void c_common_init_options               PARAMS ((enum c_language_kind));
 924 extern bool c_common_post_options               PARAMS ((void));
 925 extern const char *c_common_init                PARAMS ((const char *));
 926 extern void c_common_finish                     PARAMS ((void));
 927 extern void c_common_parse_file                 PARAMS ((int));
 928 extern HOST_WIDE_INT c_common_get_alias_set     PARAMS ((tree));
 929 extern bool c_promoting_integer_type_p          PARAMS ((tree));
 930 extern int self_promoting_args_p                PARAMS ((tree));
 931 extern tree strip_array_types                   PARAMS ((tree));
 932
 933 /* These macros provide convenient access to the various _STMT nodes.  */
 934
 935 /* Nonzero if this statement should be considered a full-expression,
 936    i.e., if temporaries created during this statement should have
 937    their destructors run at the end of this statement.  (In C, this
 938    will always be false, since there are no destructors.)  */
 939 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
 940
 941 /* IF_STMT accessors. These give access to the condition of the if
 942    statement, the then block of the if statement, and the else block
 943    of the if statement if it exists.  */
 944 #define IF_COND(NODE)           TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
 945 #define THEN_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
 946 #define ELSE_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
 947
 948 /* WHILE_STMT accessors. These give access to the condition of the
 949    while statement and the body of the while statement, respectively.  */
 950 #define WHILE_COND(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
 951 #define WHILE_BODY(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
 952
 953 /* DO_STMT accessors. These give access to the condition of the do
 954    statement and the body of the do statement, respectively.  */
 955 #define DO_COND(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
 956 #define DO_BODY(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
 957
 958 /* RETURN_STMT accessors. These give the expression associated with a
 959    return statement, and whether it should be ignored when expanding
 960    (as opposed to inlining).  */
 961 #define RETURN_STMT_EXPR(NODE)  TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
 962
 963 /* EXPR_STMT accessor. This gives the expression associated with an
 964    expression statement.  */
 965 #define EXPR_STMT_EXPR(NODE)    TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
 966
 967 /* FOR_STMT accessors. These give access to the init statement,
 968    condition, update expression, and body of the for statement,
 969    respectively.  */
 970 #define FOR_INIT_STMT(NODE)     TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
 971 #define FOR_COND(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
 972 #define FOR_EXPR(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
 973 #define FOR_BODY(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
 974
 975 /* SWITCH_STMT accessors. These give access to the condition, body and
 976    original condition type (before any compiler conversions)
 977    of the switch statement, respectively.  */
 978 #define SWITCH_COND(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
 979 #define SWITCH_BODY(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
 980 #define SWITCH_TYPE(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
 981
 982 /* CASE_LABEL accessors. These give access to the high and low values
 983    of a case label, respectively.  */
 984 #define CASE_LOW(NODE)          TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
 985 #define CASE_HIGH(NODE)         TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
 986 #define CASE_LABEL_DECL(NODE)   TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
 987
 988 /* GOTO_STMT accessor. This gives access to the label associated with
 989    a goto statement.  */
 990 #define GOTO_DESTINATION(NODE)  TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
 991 /* True for goto created artifically by the compiler.  */
 992 #define GOTO_FAKE_P(NODE)       (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
 993
 994 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
 995    statements associated with a compound statement. The result is the
 996    first statement in the list. Succeeding nodes can be accessed by
 997    calling TREE_CHAIN on a node in the list.  */
 998 #define COMPOUND_BODY(NODE)     TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
 999
1000 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1001    instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1002    ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1003    statement.  */
1004 #define ASM_CV_QUAL(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1005 #define ASM_STRING(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1006 #define ASM_OUTPUTS(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1007 #define ASM_INPUTS(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1008 #define ASM_CLOBBERS(NODE)      TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1009
1010 /* DECL_STMT accessor. This gives access to the DECL associated with
1011    the given declaration statement.  */
1012 #define DECL_STMT_DECL(NODE)    TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1013
1014 /* STMT_EXPR accessor.  */
1015 #define STMT_EXPR_STMT(NODE)    TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1016
1017 /* Nonzero if this statement-expression does not have an associated scope.  */
1018 #define STMT_EXPR_NO_SCOPE(NODE) \
1019    TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1020
1021 /* LABEL_STMT accessor. This gives access to the label associated with
1022    the given label statement.  */
1023 #define LABEL_STMT_LABEL(NODE)  TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1024
1025 /* COMPOUND_LITERAL_EXPR accessors.  */
1026 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE)           \
1027   TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1028 #define COMPOUND_LITERAL_EXPR_DECL(NODE)                        \
1029   DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1030
1031 /* Nonzero if this SCOPE_STMT is for the beginning of a scope.  */
1032 #define SCOPE_BEGIN_P(NODE) \
1033   (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1034
1035 /* Nonzero if this SCOPE_STMT is for the end of a scope.  */
1036 #define SCOPE_END_P(NODE) \
1037   (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1038
1039 /* The BLOCK containing the declarations contained in this scope.  */
1040 #define SCOPE_STMT_BLOCK(NODE) \
1041   (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1042
1043 /* Nonzero for a SCOPE_STMT if there were no variables in this scope.  */
1044 #define SCOPE_NULLIFIED_P(NODE) \
1045   (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1046
1047 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1048    which should be treated as non-existent from the point of view of
1049    running cleanup actions.  */
1050 #define SCOPE_NO_CLEANUPS_P(NODE) \
1051   (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1052
1053 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1054    For example, in:
1055
1056      S s;
1057      l:
1058      S s2;
1059      goto l;
1060
1061    there is (implicitly) a new scope after `l', even though there are
1062    no curly braces.  In particular, when we hit the goto, we must
1063    destroy s2 and then re-construct it.  For the implicit scope,
1064    SCOPE_PARTIAL_P will be set.  */
1065 #define SCOPE_PARTIAL_P(NODE) \
1066   (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1067
1068 /* Nonzero for an ASM_STMT if the assembly statement is volatile.  */
1069 #define ASM_VOLATILE_P(NODE)                    \
1070   (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1071
1072 /* The VAR_DECL to clean up in a CLEANUP_STMT.  */
1073 #define CLEANUP_DECL(NODE) \
1074   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1075 /* The cleanup to run in a CLEANUP_STMT.  */
1076 #define CLEANUP_EXPR(NODE) \
1077   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1078
1079 /* The filename we are changing to as of this FILE_STMT.  */
1080 #define FILE_STMT_FILENAME_NODE(NODE) \
1081   (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1082 #define FILE_STMT_FILENAME(NODE) \
1083   (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1084
1085 /* The line-number at which a statement began.  But if
1086    STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1087    line number for the end of the current function instead.  */
1088 #define STMT_LINENO(NODE)                       \
1089   (TREE_COMPLEXITY ((NODE)))
1090
1091 /* If non-zero, the STMT_LINENO for NODE is the line at which the
1092    function ended.  */
1093 #define STMT_LINENO_FOR_FN_P(NODE)              \
1094   (TREE_LANG_FLAG_2 ((NODE)))
1095
1096 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1097    initialization variables.  */
1098 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1099
1100 /* Nonzero if we want to create an ASM_INPUT instead of an
1101    ASM_OPERAND with no operands.  */
1102 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1103
1104 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1105
1106 enum c_tree_code {
1107   C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1108 #include "c-common.def"
1109   LAST_C_TREE_CODE
1110 };
1111
1112 #undef DEFTREECODE
1113
1114 extern void genrtl_do_pushlevel                 PARAMS ((void));
1115 extern void genrtl_goto_stmt                    PARAMS ((tree));
1116 extern void genrtl_expr_stmt                    PARAMS ((tree));
1117 extern void genrtl_expr_stmt_value              PARAMS ((tree, int, int));
1118 extern void genrtl_decl_stmt                    PARAMS ((tree));
1119 extern void genrtl_if_stmt                      PARAMS ((tree));
1120 extern void genrtl_while_stmt                   PARAMS ((tree));
1121 extern void genrtl_do_stmt                      PARAMS ((tree));
1122 extern void genrtl_return_stmt                  PARAMS ((tree));
1123 extern void genrtl_for_stmt                     PARAMS ((tree));
1124 extern void genrtl_break_stmt                   PARAMS ((void));
1125 extern void genrtl_continue_stmt                PARAMS ((void));
1126 extern void genrtl_scope_stmt                   PARAMS ((tree));
1127 extern void genrtl_switch_stmt                  PARAMS ((tree));
1128 extern void genrtl_case_label                   PARAMS ((tree));
1129 extern void genrtl_compound_stmt                PARAMS ((tree));
1130 extern void genrtl_asm_stmt                     PARAMS ((tree, tree,
1131                                                          tree, tree,
1132                                                          tree, int));
1133 extern void genrtl_decl_cleanup                 PARAMS ((tree));
1134 extern int stmts_are_full_exprs_p               PARAMS ((void));
1135 extern int anon_aggr_type_p                     PARAMS ((tree));
1136
1137 /* For a VAR_DECL that is an anonymous union, these are the various
1138    sub-variables that make up the anonymous union.  */
1139 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1140
1141 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
1142 #define DECL_C_BIT_FIELD(NODE) \
1143   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1144 #define SET_DECL_C_BIT_FIELD(NODE) \
1145   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1146 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1147   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1148
1149 /* In a VAR_DECL, nonzero if the decl is a register variable with
1150    an explicit asm specification.  */
1151 #define DECL_C_HARD_REGISTER(DECL)  DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1152
1153 extern void emit_local_var                      PARAMS ((tree));
1154 extern void make_rtl_for_local_static           PARAMS ((tree));
1155 extern tree expand_cond                         PARAMS ((tree));
1156 extern tree c_expand_return                     PARAMS ((tree));
1157 extern tree do_case                             PARAMS ((tree, tree));
1158 extern tree build_stmt                          PARAMS ((enum tree_code, ...));
1159 extern tree build_case_label                    PARAMS ((tree, tree, tree));
1160 extern tree build_continue_stmt                 PARAMS ((void));
1161 extern tree build_break_stmt                    PARAMS ((void));
1162 extern tree build_return_stmt                   PARAMS ((tree));
1163
1164 #define COMPOUND_STMT_NO_SCOPE(NODE)    TREE_LANG_FLAG_0 (NODE)
1165
1166 /* Used by the C++ frontend to mark the block around the member
1167    initializers and cleanups.  */
1168 #define COMPOUND_STMT_BODY_BLOCK(NODE)  TREE_LANG_FLAG_3 (NODE)
1169
1170 extern void c_expand_asm_operands               PARAMS ((tree, tree, tree, tree, int, const char *, int));
1171
1172 /* These functions must be defined by each front-end which implements
1173    a variant of the C language.  They are used in c-common.c.  */
1174
1175 extern tree build_unary_op                      PARAMS ((enum tree_code,
1176                                                          tree, int));
1177 extern tree build_binary_op                     PARAMS ((enum tree_code,
1178                                                          tree, tree, int));
1179 extern int lvalue_p                             PARAMS ((tree));
1180 extern tree default_conversion                  PARAMS ((tree));
1181
1182 /* Given two integer or real types, return the type for their sum.
1183    Given two compatible ANSI C types, returns the merged type.  */
1184
1185 extern tree common_type                         PARAMS ((tree, tree));
1186
1187 extern tree expand_tree_builtin                 PARAMS ((tree, tree, tree));
1188
1189 extern tree decl_constant_value         PARAMS ((tree));
1190
1191 /* Handle increment and decrement of boolean types.  */
1192 extern tree boolean_increment                   PARAMS ((enum tree_code,
1193                                                          tree));
1194
1195 /* Hook currently used only by the C++ front end to reset internal state
1196    after entering or leaving a header file.  */
1197 extern void extract_interface_info              PARAMS ((void));
1198
1199 extern int case_compare                         PARAMS ((splay_tree_key,
1200                                                          splay_tree_key));
1201
1202 extern tree c_add_case_label                    PARAMS ((splay_tree,
1203                                                          tree, tree,
1204                                                          tree));
1205
1206 extern tree build_function_call                 PARAMS ((tree, tree));
1207
1208 extern tree finish_label_address_expr           PARAMS ((tree));
1209
1210 /* Same function prototype, but the C and C++ front ends have
1211    different implementations.  Used in c-common.c.  */
1212 extern tree lookup_label                        PARAMS ((tree));
1213
1214 extern rtx c_expand_expr                        PARAMS ((tree, rtx,
1215                                                          enum machine_mode,
1216                                                          int));
1217
1218 extern int c_safe_from_p                        PARAMS ((rtx, tree));
1219
1220 extern int c_staticp                            PARAMS ((tree));
1221
1222 extern int c_common_unsafe_for_reeval           PARAMS ((tree));
1223
1224 extern const char *init_c_lex                   PARAMS ((const char *));
1225
1226 extern void cb_register_builtins                PARAMS ((cpp_reader *));
1227
1228 /* Information recorded about each file examined during compilation.  */
1229
1230 struct c_fileinfo
1231 {
1232   int time;     /* Time spent in the file.  */
1233   short interface_only;         /* Flags - used only by C++ */
1234   short interface_unknown;
1235 };
1236
1237 struct c_fileinfo *get_fileinfo                 PARAMS ((const char *));
1238 extern void dump_time_statistics                PARAMS ((void));
1239
1240 extern int c_dump_tree                          PARAMS ((void *, tree));
1241
1242 #endif /* ! GCC_C_COMMON_H */