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 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 #include "ggc.h"
  28
  29 /* Usage of TREE_LANG_FLAG_?:
  30    0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
  31       TREE_NEGATED_INT (in INTEGER_CST).
  32       IDENTIFIER_MARKED (used by search routines).
  33       SCOPE_BEGIN_P (in SCOPE_STMT)
  34       DECL_PRETTY_FUNCTION_P (in VAR_DECL)
  35       NEW_FOR_SCOPE_P (in FOR_STMT)
  36       ASM_INPUT_P (in ASM_STMT)
  37       STMT_EXPR_NO_SCOPE (in STMT_EXPR)
  38    1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
  39       STMT_IS_FULL_EXPR_P (in _STMT)
  40    2: STMT_LINENO_FOR_FN_P (in _STMT)
  41    3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
  42       COMPOUND_STMT_BODY_BLOCK (in COMPOUND_STMT)
  43    4: SCOPE_PARTIAL_P (in SCOPE_STMT)
  44 */
  45
  46 /* Reserved identifiers.  This is the union of all the keywords for C,
  47    C++, and Objective-C.  All the type modifiers have to be in one
  48    block at the beginning, because they are used as mask bits.  There
  49    are 27 type modifiers; if we add many more we will have to redesign
  50    the mask mechanism.  */
  51
  52 enum rid
  53 {
  54   /* Modifiers: */
  55   /* C, in empirical order of frequency.  */
  56   RID_STATIC = 0,
  57   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  58   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  59   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  60
  61   /* C extensions */
  62   RID_COMPLEX, RID_THREAD,
  63
  64   /* C++ */
  65   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  66
  67   /* ObjC */
  68   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  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_PTRBASE,
  80   RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
  81
  82   /* Too many ways of getting the name of a function as a string */
  83   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
  84
  85   /* C++ */
  86   RID_BOOL,     RID_WCHAR,    RID_CLASS,
  87   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
  88   RID_TEMPLATE, RID_NULL,     RID_CATCH,
  89   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
  90   RID_NEW,      RID_OPERATOR, RID_THIS,
  91   RID_THROW,    RID_TRUE,     RID_TRY,
  92   RID_TYPENAME, RID_TYPEID,   RID_USING,
  93
  94   /* casts */
  95   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
  96
  97   /* Objective-C */
  98   RID_ID,          RID_AT_ENCODE,    RID_AT_END,
  99   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 100   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 101   RID_AT_PROTOCOL, RID_AT_SELECTOR,  RID_AT_INTERFACE,
 102   RID_AT_IMPLEMENTATION,
 103
 104   RID_MAX,
 105
 106   RID_FIRST_MODIFIER = RID_STATIC,
 107   RID_LAST_MODIFIER = RID_ONEWAY,
 108
 109   RID_FIRST_AT = RID_AT_ENCODE,
 110   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 111   RID_FIRST_PQ = RID_IN,
 112   RID_LAST_PQ = RID_ONEWAY
 113 };
 114
 115 #define OBJC_IS_AT_KEYWORD(rid) \
 116   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
 117    (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
 118
 119 #define OBJC_IS_PQ_KEYWORD(rid) \
 120   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
 121    (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
 122
 123 /* The elements of `ridpointers' are identifier nodes for the reserved
 124    type names and storage classes.  It is indexed by a RID_... value.  */
 125 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
 126
 127 /* Standard named or nameless data types of the C compiler.  */
 128
 129 enum c_tree_index
 130 {
 131     CTI_WCHAR_TYPE,
 132     CTI_SIGNED_WCHAR_TYPE,
 133     CTI_UNSIGNED_WCHAR_TYPE,
 134     CTI_WINT_TYPE,
 135     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 136     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 137     CTI_INTMAX_TYPE,
 138     CTI_UINTMAX_TYPE,
 139     CTI_WIDEST_INT_LIT_TYPE,
 140     CTI_WIDEST_UINT_LIT_TYPE,
 141
 142     CTI_CHAR_ARRAY_TYPE,
 143     CTI_WCHAR_ARRAY_TYPE,
 144     CTI_INT_ARRAY_TYPE,
 145     CTI_STRING_TYPE,
 146     CTI_CONST_STRING_TYPE,
 147
 148     /* Type for boolean expressions (bool in C++, int in C).  */
 149     CTI_TRUTHVALUE_TYPE,
 150     CTI_TRUTHVALUE_TRUE,
 151     CTI_TRUTHVALUE_FALSE,
 152
 153     CTI_DEFAULT_FUNCTION_TYPE,
 154
 155     CTI_G77_INTEGER_TYPE,
 156     CTI_G77_UINTEGER_TYPE,
 157     CTI_G77_LONGINT_TYPE,
 158     CTI_G77_ULONGINT_TYPE,
 159
 160     /* These are not types, but we have to look them up all the time.  */
 161     CTI_FUNCTION_NAME_DECL,
 162     CTI_PRETTY_FUNCTION_NAME_DECL,
 163     CTI_C99_FUNCTION_NAME_DECL,
 164     CTI_SAVED_FUNCTION_NAME_DECLS,
 165
 166     CTI_VOID_ZERO,
 167
 168     CTI_MAX
 169 };
 170
 171 #define C_RID_CODE(id)  (((struct c_common_identifier *) (id))->node.rid_code)
 172
 173 /* Identifier part common to the C front ends.  Inherits from
 174    tree_identifier, despite appearances.  */
 175 struct c_common_identifier GTY(())
 176 {
 177   struct tree_common common;
 178   struct cpp_hashnode node;
 179 };
 180
 181 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 182 #define signed_wchar_type_node          c_global_trees[CTI_SIGNED_WCHAR_TYPE]
 183 #define unsigned_wchar_type_node        c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
 184 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 185 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 186 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 187 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 188 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 189 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 190 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 191
 192 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 193 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 194 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 195
 196 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 197 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 198 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 199 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 200 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 201
 202 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 203
 204 /* g77 integer types, which which must be kept in sync with f/com.h */
 205 #define g77_integer_type_node           c_global_trees[CTI_G77_INTEGER_TYPE]
 206 #define g77_uinteger_type_node          c_global_trees[CTI_G77_UINTEGER_TYPE]
 207 #define g77_longint_type_node           c_global_trees[CTI_G77_LONGINT_TYPE]
 208 #define g77_ulongint_type_node          c_global_trees[CTI_G77_ULONGINT_TYPE]
 209
 210 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 211 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 212 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 213 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 214
 215 /* A node for `((void) 0)'.  */
 216 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 217
 218 extern GTY(()) tree c_global_trees[CTI_MAX];
 219
 220 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a tree for size reasons.  */
 221 struct sorted_fields_type GTY(())
 222 {
 223   int len;
 224   tree GTY((length ("%h.len"))) elts[1];
 225 };
 226
 227 /* Mark which labels are explicitly declared.
 228    These may be shadowed, and may be referenced from nested functions.  */
 229 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 230
 231 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
 232    warning if they undergo concatenation.  */
 233 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
 234
 235 typedef enum c_language_kind
 236 {
 237   clk_c         = 0,            /* C90, C94 or C99 */
 238   clk_objc      = 1,            /* clk_c with ObjC features.  */
 239   clk_cxx       = 2,            /* ANSI/ISO C++ */
 240   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 241 }
 242 c_language_kind;
 243
 244 /* To test for a specific language use c_language, defined by each
 245    front end.  For "ObjC features" or "not C++" use the macros.  */
 246 extern c_language_kind c_language;
 247
 248 #define c_dialect_cxx()         (c_language & clk_cxx)
 249 #define c_dialect_objc()        (c_language & clk_objc)
 250
 251 /* Information about a statement tree.  */
 252
 253 struct stmt_tree_s GTY(()) {
 254   /* The last statement added to the tree.  */
 255   tree x_last_stmt;
 256   /* The type of the last expression statement.  (This information is
 257      needed to implement the statement-expression extension.)  */
 258   tree x_last_expr_type;
 259   /* The last filename we recorded.  */
 260   const char *x_last_expr_filename;
 261   /* In C++, Nonzero if we should treat statements as full
 262      expressions.  In particular, this variable is no-zero if at the
 263      end of a statement we should destroy any temporaries created
 264      during that statement.  Similarly, if, at the end of a block, we
 265      should destroy any local variables in this block.  Normally, this
 266      variable is nonzero, since those are the normal semantics of
 267      C++.
 268
 269      However, in order to represent aggregate initialization code as
 270      tree structure, we use statement-expressions.  The statements
 271      within the statement expression should not result in cleanups
 272      being run until the entire enclosing statement is complete.
 273
 274      This flag has no effect in C.  */
 275   int stmts_are_full_exprs_p;
 276 };
 277
 278 typedef struct stmt_tree_s *stmt_tree;
 279
 280 /* Global state pertinent to the current function.  Some C dialects
 281    extend this structure with additional fields.  */
 282
 283 struct c_language_function GTY(()) {
 284   /* While we are parsing the function, this contains information
 285      about the statement-tree that we are building.  */
 286   struct stmt_tree_s x_stmt_tree;
 287   /* The stack of SCOPE_STMTs for the current function.  */
 288   tree x_scope_stmt_stack;
 289 };
 290
 291 /* When building a statement-tree, this is the last statement added to
 292    the tree.  */
 293
 294 #define last_tree (current_stmt_tree ()->x_last_stmt)
 295
 296 /* The type of the last expression-statement we have seen.  */
 297
 298 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
 299
 300 /* The name of the last file we have seen.  */
 301
 302 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
 303
 304 /* LAST_TREE contains the last statement parsed.  These are chained
 305    together through the TREE_CHAIN field, but often need to be
 306    re-organized since the parse is performed bottom-up.  This macro
 307    makes LAST_TREE the indicated SUBSTMT of STMT.  */
 308
 309 #define RECHAIN_STMTS(stmt, substmt)            \
 310   do {                                          \
 311     substmt = TREE_CHAIN (stmt);                \
 312     TREE_CHAIN (stmt) = NULL_TREE;              \
 313     last_tree = stmt;                           \
 314   } while (0)
 315
 316 /* Language-specific hooks.  */
 317
 318 extern void (*lang_expand_stmt) (tree);
 319 extern void (*lang_expand_decl_stmt) (tree);
 320 extern void (*lang_expand_function_end) (void);
 321
 322 /* Callback that determines if it's ok for a function to have no
 323    noreturn attribute.  */
 324 extern int (*lang_missing_noreturn_ok_p) (tree);
 325
 326 extern int yyparse (void);
 327 extern void free_parser_stacks (void);
 328
 329 extern stmt_tree current_stmt_tree (void);
 330 extern tree *current_scope_stmt_stack (void);
 331 extern void begin_stmt_tree (tree *);
 332 extern tree add_stmt (tree);
 333 extern void add_decl_stmt (tree);
 334 extern tree add_scope_stmt (int, int);
 335 extern void finish_stmt_tree (tree *);
 336
 337 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
 338 extern void prep_stmt (tree);
 339 extern void expand_stmt (tree);
 340 extern tree c_begin_if_stmt (void);
 341 extern tree c_begin_while_stmt (void);
 342 extern void c_finish_while_stmt_cond (tree, tree);
 343
 344 enum sw_kind { SW_PARAM = 0, SW_LOCAL, SW_GLOBAL };
 345 extern void shadow_warning (enum sw_kind, const char *, tree);
 346 extern int field_decl_cmp (const void *, const void *);
 347 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 348                                   void *);
 349 \f
 350 /* Switches common to the C front ends.  */
 351
 352 /* Nonzero if prepreprocessing only.  */
 353
 354 extern int flag_preprocess_only;
 355
 356 /* Nonzero means don't output line number information.  */
 357
 358 extern char flag_no_line_commands;
 359
 360 /* Nonzero causes -E output not to be done, but directives such as
 361    #define that have side effects are still obeyed.  */
 362
 363 extern char flag_no_output;
 364
 365 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
 366    'N' of the command line switch.  */
 367
 368 extern char flag_dump_macros;
 369
 370 /* Nonzero means pass #include lines through to the output.  */
 371
 372 extern char flag_dump_includes;
 373
 374 /* The file name to which we should write a precompiled header, or
 375    NULL if no header will be written in this compile.  */
 376
 377 extern const char *pch_file;
 378
 379 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 380    user's namespace.  */
 381
 382 extern int flag_iso;
 383
 384 /* Nonzero if -undef was given.  It suppresses target built-in macros
 385    and assertions.  */
 386
 387 extern int flag_undef;
 388
 389 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 390
 391 extern int flag_no_builtin;
 392
 393 /* Nonzero means don't recognize the non-ANSI builtin functions.
 394    -ansi sets this.  */
 395
 396 extern int flag_no_nonansi_builtin;
 397
 398 /* Nonzero means give `double' the same size as `float'.  */
 399
 400 extern int flag_short_double;
 401
 402 /* Nonzero means give `wchar_t' the same size as `short'.  */
 403
 404 extern int flag_short_wchar;
 405
 406 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 407 extern int flag_ms_extensions;
 408
 409 /* Nonzero means don't recognize the keyword `asm'.  */
 410
 411 extern int flag_no_asm;
 412
 413 /* Nonzero means give string constants the type `const char *', as mandated
 414    by the standard.  */
 415
 416 extern int flag_const_strings;
 417
 418 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 419
 420 extern int flag_signed_bitfields;
 421 extern int explicit_flag_signed_bitfields;
 422
 423 /* Nonzero means warn about pointer casts that can drop a type qualifier
 424    from the pointer target type.  */
 425
 426 extern int warn_cast_qual;
 427
 428 /* Warn about functions which might be candidates for format attributes.  */
 429
 430 extern int warn_missing_format_attribute;
 431
 432 /* Nonzero means warn about sizeof(function) or addition/subtraction
 433    of function pointers.  */
 434
 435 extern int warn_pointer_arith;
 436
 437 /* Nonzero means warn for any global function def
 438    without separate previous prototype decl.  */
 439
 440 extern int warn_missing_prototypes;
 441
 442 /* Warn if adding () is suggested.  */
 443
 444 extern int warn_parentheses;
 445
 446 /* Warn if initializer is not completely bracketed.  */
 447
 448 extern int warn_missing_braces;
 449
 450 /* Warn about comparison of signed and unsigned values.
 451    If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified.  */
 452
 453 extern int warn_sign_compare;
 454
 455 /* Nonzero means warn about usage of long long when `-pedantic'.  */
 456
 457 extern int warn_long_long;
 458
 459 /* Nonzero means warn about deprecated conversion from string constant to
 460    `char *'.  */
 461
 462 extern int warn_write_strings;
 463
 464 /* Nonzero means warn about multiple (redundant) decls for the same single
 465    variable or function.  */
 466
 467 extern int warn_redundant_decls;
 468
 469 /* Warn about testing equality of floating point numbers.  */
 470
 471 extern int warn_float_equal;
 472
 473 /* Warn about a subscript that has type char.  */
 474
 475 extern int warn_char_subscripts;
 476
 477 /* Warn if a type conversion is done that might have confusing results.  */
 478
 479 extern int warn_conversion;
 480
 481 /* Warn about #pragma directives that are not recognized.  */
 482
 483 extern int warn_unknown_pragmas; /* Tri state variable.  */
 484
 485 /* Warn about format/argument anomalies in calls to formatted I/O functions
 486    (*printf, *scanf, strftime, strfmon, etc.).  */
 487
 488 extern int warn_format;
 489
 490 /* Warn about Y2K problems with strftime formats.  */
 491
 492 extern int warn_format_y2k;
 493
 494 /* Warn about excess arguments to formats.  */
 495
 496 extern int warn_format_extra_args;
 497
 498 /* Warn about zero-length formats.  */
 499
 500 extern int warn_format_zero_length;
 501
 502 /* Warn about non-literal format arguments.  */
 503
 504 extern int warn_format_nonliteral;
 505
 506 /* Warn about possible security problems with calls to format functions.  */
 507
 508 extern int warn_format_security;
 509
 510
 511 /* C/ObjC language option variables.  */
 512
 513
 514 /* Nonzero means message about use of implicit function declarations;
 515  1 means warning; 2 means error.  */
 516
 517 extern int mesg_implicit_function_declaration;
 518
 519 /* Nonzero means allow type mismatches in conditional expressions;
 520    just make their values `void'.  */
 521
 522 extern int flag_cond_mismatch;
 523
 524 /* Nonzero means enable C89 Amendment 1 features.  */
 525
 526 extern int flag_isoc94;
 527
 528 /* Nonzero means use the ISO C99 dialect of C.  */
 529
 530 extern int flag_isoc99;
 531
 532 /* Nonzero means that we have builtin functions, and main is an int */
 533
 534 extern int flag_hosted;
 535
 536 /* Nonzero means warn when casting a function call to a type that does
 537    not match the return type (e.g. (float)sqrt() or (anything*)malloc()
 538    when there is no previous declaration of sqrt or malloc.  */
 539
 540 extern int warn_bad_function_cast;
 541
 542 /* Warn about traditional constructs whose meanings changed in ANSI C.  */
 543
 544 extern int warn_traditional;
 545
 546 /* Nonzero means warn for a declaration found after a statement.  */
 547
 548 extern int warn_declaration_after_statement;
 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 warn about uninitialized variable when it is initialized with itself.
 577    For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero.  */
 578
 579 extern int warn_init_self;
 580
 581
 582 /* Nonzero means to warn about compile-time division by zero.  */
 583 extern int warn_div_by_zero;
 584
 585 /* Nonzero means warn about use of implicit int.  */
 586
 587 extern int warn_implicit_int;
 588
 589 /* Warn about NULL being passed to argument slots marked as requiring
 590    non-NULL.  */
 591
 592 extern int warn_nonnull;
 593
 594
 595 /* ObjC language option variables.  */
 596
 597
 598 /* Open and close the file for outputting class declarations, if
 599    requested (ObjC).  */
 600
 601 extern int flag_gen_declaration;
 602
 603 /* Generate code for GNU or NeXT runtime environment.  */
 604
 605 extern int flag_next_runtime;
 606
 607 /* Tells the compiler that this is a special run.  Do not perform any
 608    compiling, instead we are to test some platform dependent features
 609    and output a C header file with appropriate definitions.  */
 610
 611 extern int print_struct_values;
 612
 613 /* ???.  Undocumented.  */
 614
 615 extern const char *constant_string_class_name;
 616
 617 /* Warn if multiple methods are seen for the same selector, but with
 618    different argument types.  Performs the check on the whole selector
 619    table at the end of compilation.  */
 620
 621 extern int warn_selector;
 622
 623 /* Warn if a @selector() is found, and no method with that selector
 624    has been previously declared.  The check is done on each
 625    @selector() as soon as it is found - so it warns about forward
 626    declarations.  */
 627
 628 extern int warn_undeclared_selector;
 629
 630 /* Warn if methods required by a protocol are not implemented in the
 631    class adopting it.  When turned off, methods inherited to that
 632    class are also considered implemented.  */
 633
 634 extern int warn_protocol;
 635
 636
 637 /* C++ language option variables.  */
 638
 639
 640 /* Nonzero means don't recognize any extension keywords.  */
 641
 642 extern int flag_no_gnu_keywords;
 643
 644 /* Nonzero means do emit exported implementations of functions even if
 645    they can be inlined.  */
 646
 647 extern int flag_implement_inlines;
 648
 649 /* Nonzero means do emit exported implementations of templates, instead of
 650    multiple static copies in each file that needs a definition.  */
 651
 652 extern int flag_external_templates;
 653
 654 /* Nonzero means that the decision to emit or not emit the implementation of a
 655    template depends on where the template is instantiated, rather than where
 656    it is defined.  */
 657
 658 extern int flag_alt_external_templates;
 659
 660 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 661
 662 extern int flag_implicit_templates;
 663
 664 /* Nonzero means that implicit instantiations of inline templates will be
 665    emitted if needed, even if instantiations of non-inline templates
 666    aren't.  */
 667
 668 extern int flag_implicit_inline_templates;
 669
 670 /* Nonzero means generate separate instantiation control files and
 671    juggle them at link time.  */
 672
 673 extern int flag_use_repository;
 674
 675 /* Nonzero if we want to issue diagnostics that the standard says are not
 676    required.  */
 677
 678 extern int flag_optional_diags;
 679
 680 /* Nonzero means we should attempt to elide constructors when possible.  */
 681
 682 extern int flag_elide_constructors;
 683
 684 /* Nonzero means that member functions defined in class scope are
 685    inline by default.  */
 686
 687 extern int flag_default_inline;
 688
 689 /* Controls whether compiler generates 'type descriptor' that give
 690    run-time type information.  */
 691
 692 extern int flag_rtti;
 693
 694 /* Nonzero if we want to conserve space in the .o files.  We do this
 695    by putting uninitialized data and runtime initialized data into
 696    .common instead of .data at the expense of not flagging multiple
 697    definitions.  */
 698
 699 extern int flag_conserve_space;
 700
 701 /* Nonzero if we want to obey access control semantics.  */
 702
 703 extern int flag_access_control;
 704
 705 /* Nonzero if we want to check the return value of new and avoid calling
 706    constructors if it is a null pointer.  */
 707
 708 extern int flag_check_new;
 709
 710 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 711    initialization variables.
 712    0: Old rules, set by -fno-for-scope.
 713    2: New ISO rules, set by -ffor-scope.
 714    1: Try to implement new ISO rules, but with backup compatibility
 715    (and warnings).  This is the default, for now.  */
 716
 717 extern int flag_new_for_scope;
 718
 719 /* Nonzero if we want to emit defined symbols with common-like linkage as
 720    weak symbols where possible, in order to conform to C++ semantics.
 721    Otherwise, emit them as local symbols.  */
 722
 723 extern int flag_weak;
 724
 725 /* 0 means we want the preprocessor to not emit line directives for
 726    the current working directory.  1 means we want it to do it.  -1
 727    means we should decide depending on whether debugging information
 728    is being emitted or not.  */
 729
 730 extern int flag_working_directory;
 731
 732 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 733    destructors for local statics and global objects.  */
 734
 735 extern int flag_use_cxa_atexit;
 736
 737 /* Nonzero means make the default pedwarns warnings instead of errors.
 738    The value of this flag is ignored if -pedantic is specified.  */
 739
 740 extern int flag_permissive;
 741
 742 /* Nonzero means to implement standard semantics for exception
 743    specifications, calling unexpected if an exception is thrown that
 744    doesn't match the specification.  Zero means to treat them as
 745    assertions and optimize accordingly, but not check them.  */
 746
 747 extern int flag_enforce_eh_specs;
 748
 749 /*  The version of the C++ ABI in use.  The following values are
 750     allowed:
 751
 752     0: The version of the ABI believed most conformant with the
 753        C++ ABI specification.  This ABI may change as bugs are
 754        discovered and fixed.  Therefore, 0 will not necessarily
 755        indicate the same ABI in different versions of G++.
 756
 757     1: The version of the ABI first used in G++ 3.2.
 758
 759     Additional positive integers will be assigned as new versions of
 760     the ABI become the default version of the ABI.  */
 761
 762 extern int flag_abi_version;
 763
 764 /* Nonzero means warn about things that will change when compiling
 765    with an ABI-compliant compiler.  */
 766
 767 extern int warn_abi;
 768
 769 /* Nonzero means warn about invalid uses of offsetof.  */
 770
 771 extern int warn_invalid_offsetof;
 772
 773 /* Nonzero means warn about implicit declarations.  */
 774
 775 extern int warn_implicit;
 776
 777 /* Nonzero means warn when all ctors or dtors are private, and the class
 778    has no friends.  */
 779
 780 extern int warn_ctor_dtor_privacy;
 781
 782 /* Nonzero means warn in function declared in derived class has the
 783    same name as a virtual in the base class, but fails to match the
 784    type signature of any virtual function in the base class.  */
 785
 786 extern int warn_overloaded_virtual;
 787
 788 /* Nonzero means warn when declaring a class that has a non virtual
 789    destructor, when it really ought to have a virtual one.  */
 790
 791 extern int warn_nonvdtor;
 792
 793 /* Nonzero means warn when the compiler will reorder code.  */
 794
 795 extern int warn_reorder;
 796
 797 /* Nonzero means warn when synthesis behavior differs from Cfront's.  */
 798
 799 extern int warn_synth;
 800
 801 /* Nonzero means warn when we convert a pointer to member function
 802    into a pointer to (void or function).  */
 803
 804 extern int warn_pmf2ptr;
 805
 806 /* Nonzero means warn about violation of some Effective C++ style rules.  */
 807
 808 extern int warn_ecpp;
 809
 810 /* Nonzero means warn where overload resolution chooses a promotion from
 811    unsigned to signed over a conversion to an unsigned of the same size.  */
 812
 813 extern int warn_sign_promo;
 814
 815 /* Nonzero means warn when an old-style cast is used.  */
 816
 817 extern int warn_old_style_cast;
 818
 819 /* Nonzero means warn when non-templatized friend functions are
 820    declared within a template */
 821
 822 extern int warn_nontemplate_friend;
 823
 824 /* Nonzero means complain about deprecated features.  */
 825
 826 extern int warn_deprecated;
 827
 828 /* Maximum template instantiation depth.  This limit is rather
 829    arbitrary, but it exists to limit the time it takes to notice
 830    infinite template instantiations.  */
 831
 832 extern int max_tinst_depth;
 833
 834 /* Nonzero means the expression being parsed will never be evaluated.
 835    This is a count, since unevaluated expressions can nest.  */
 836
 837 extern int skip_evaluation;
 838
 839 /* C types are partitioned into three subsets: object, function, and
 840    incomplete types.  */
 841 #define C_TYPE_OBJECT_P(type) \
 842   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 843
 844 #define C_TYPE_INCOMPLETE_P(type) \
 845   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 846
 847 #define C_TYPE_FUNCTION_P(type) \
 848   (TREE_CODE (type) == FUNCTION_TYPE)
 849
 850 /* For convenience we define a single macro to identify the class of
 851    object or incomplete types.  */
 852 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 853   (!C_TYPE_FUNCTION_P (type))
 854
 855 /* Record in each node resulting from a binary operator
 856    what operator was specified for it.  */
 857 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
 858
 859 /* Attribute table common to the C front ends.  */
 860 extern const struct attribute_spec c_common_attribute_table[];
 861 extern const struct attribute_spec c_common_format_attribute_table[];
 862
 863 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 864    ID is the identifier to use, NAME is the string.
 865    TYPE_DEP indicates whether it depends on type of the function or not
 866    (i.e. __PRETTY_FUNCTION__).  */
 867
 868 extern tree (*make_fname_decl) (tree, int);
 869
 870 extern tree identifier_global_value (tree);
 871 extern void record_builtin_type (enum rid, const char *, tree);
 872 extern tree build_void_list_node (void);
 873 extern void start_fname_decls (void);
 874 extern void finish_fname_decls (void);
 875 extern const char *fname_as_string (int);
 876 extern tree fname_decl (unsigned, tree);
 877
 878 extern void check_function_arguments (tree, tree);
 879 extern void check_function_arguments_recurse (void (*)
 880                                               (void *, tree,
 881                                                unsigned HOST_WIDE_INT),
 882                                               void *, tree,
 883                                               unsigned HOST_WIDE_INT);
 884 extern void check_function_format (int *, tree, tree);
 885 extern void set_Wformat (int);
 886 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 887 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 888 extern int c_common_handle_option (size_t code, const char *arg, int value);
 889 extern bool c_common_missing_argument (const char *opt, size_t code);
 890 extern tree c_common_type_for_mode (enum machine_mode, int);
 891 extern tree c_common_type_for_size (unsigned int, int);
 892 extern tree c_common_unsigned_type (tree);
 893 extern tree c_common_signed_type (tree);
 894 extern tree c_common_signed_or_unsigned_type (int, tree);
 895 extern tree c_common_truthvalue_conversion (tree);
 896 extern void c_apply_type_quals_to_decl (int, tree);
 897 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
 898 extern tree c_alignof_expr (tree);
 899 /* Print an error message for invalid operands to arith operation CODE.
 900    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 901 extern void binary_op_error (enum tree_code);
 902 #define my_friendly_assert(EXP, N) (void) \
 903  (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
 904
 905 extern tree c_expand_expr_stmt (tree);
 906 extern void c_expand_start_cond (tree, int, tree);
 907 extern void c_finish_then (void);
 908 extern void c_expand_start_else (void);
 909 extern void c_finish_else (void);
 910 extern void c_expand_end_cond (void);
 911 /* Validate the expression after `case' and apply default promotions.  */
 912 extern tree check_case_value (tree);
 913 extern tree fix_string_type (tree);
 914 struct varray_head_tag;
 915 extern void constant_expression_warning (tree);
 916 extern tree convert_and_check (tree, tree);
 917 extern void overflow_warning (tree);
 918 extern void unsigned_conversion_warning (tree, tree);
 919
 920 /* Read the rest of the current #-directive line.  */
 921 extern char *get_directive_line (void);
 922 #define GET_DIRECTIVE_LINE() get_directive_line ()
 923 #define c_sizeof(T)  c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
 924 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
 925
 926 /* Subroutine of build_binary_op, used for comparison operations.
 927    See if the operands have both been converted from subword integer types
 928    and, if so, perhaps change them both back to their original type.  */
 929 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 930
 931 extern tree pointer_int_sum (enum tree_code, tree, tree);
 932 extern unsigned int min_precision (tree, int);
 933
 934 /* Add qualifiers to a type, in the fashion for C.  */
 935 extern tree c_build_qualified_type (tree, int);
 936
 937 /* Build tree nodes and builtin functions common to both C and C++ language
 938    frontends.  */
 939 extern void c_common_nodes_and_builtins (void);
 940
 941 extern void disable_builtin_function (const char *);
 942
 943 extern tree build_va_arg (tree, tree);
 944
 945 extern unsigned int c_common_init_options (unsigned int, const char **);
 946 extern bool c_common_post_options (const char **);
 947 extern bool c_common_init (void);
 948 extern void c_common_finish (void);
 949 extern void c_common_parse_file (int);
 950 extern HOST_WIDE_INT c_common_get_alias_set (tree);
 951 extern bool c_promoting_integer_type_p (tree);
 952 extern int self_promoting_args_p (tree);
 953 extern tree strip_array_types (tree);
 954 extern tree strip_pointer_operator (tree);
 955
 956 /* This function resets the parsers' state in preparation for parsing
 957    a new file.  */
 958 extern void c_reset_state (void);
 959 /* This is the basic parsing function.  */
 960 extern void c_parse_file (void);
 961 /* This is misnamed, it actually performs end-of-compilation processing.  */
 962 extern void finish_file (void);
 963
 964 /* These macros provide convenient access to the various _STMT nodes.  */
 965
 966 /* Nonzero if this statement should be considered a full-expression,
 967    i.e., if temporaries created during this statement should have
 968    their destructors run at the end of this statement.  (In C, this
 969    will always be false, since there are no destructors.)  */
 970 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
 971
 972 /* IF_STMT accessors. These give access to the condition of the if
 973    statement, the then block of the if statement, and the else block
 974    of the if statement if it exists.  */
 975 #define IF_COND(NODE)           TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
 976 #define THEN_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
 977 #define ELSE_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
 978
 979 /* WHILE_STMT accessors. These give access to the condition of the
 980    while statement and the body of the while statement, respectively.  */
 981 #define WHILE_COND(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
 982 #define WHILE_BODY(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
 983
 984 /* DO_STMT accessors. These give access to the condition of the do
 985    statement and the body of the do statement, respectively.  */
 986 #define DO_COND(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
 987 #define DO_BODY(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
 988
 989 /* RETURN_STMT accessors. These give the expression associated with a
 990    return statement, and whether it should be ignored when expanding
 991    (as opposed to inlining).  */
 992 #define RETURN_STMT_EXPR(NODE)  TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
 993
 994 /* EXPR_STMT accessor. This gives the expression associated with an
 995    expression statement.  */
 996 #define EXPR_STMT_EXPR(NODE)    TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
 997
 998 /* FOR_STMT accessors. These give access to the init statement,
 999    condition, update expression, and body of the for statement,
1000    respectively.  */
1001 #define FOR_INIT_STMT(NODE)     TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
1002 #define FOR_COND(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1003 #define FOR_EXPR(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1004 #define FOR_BODY(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1005
1006 /* SWITCH_STMT accessors. These give access to the condition, body and
1007    original condition type (before any compiler conversions)
1008    of the switch statement, respectively.  */
1009 #define SWITCH_COND(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1010 #define SWITCH_BODY(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1011 #define SWITCH_TYPE(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1012
1013 /* CASE_LABEL accessors. These give access to the high and low values
1014    of a case label, respectively.  */
1015 #define CASE_LOW(NODE)          TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1016 #define CASE_HIGH(NODE)         TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1017 #define CASE_LABEL_DECL(NODE)   TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1018
1019 /* GOTO_STMT accessor. This gives access to the label associated with
1020    a goto statement.  */
1021 #define GOTO_DESTINATION(NODE)  TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1022 /* True for goto created artificially by the compiler.  */
1023 #define GOTO_FAKE_P(NODE)       (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1024
1025 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1026    statements associated with a compound statement. The result is the
1027    first statement in the list. Succeeding nodes can be accessed by
1028    calling TREE_CHAIN on a node in the list.  */
1029 #define COMPOUND_BODY(NODE)     TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1030
1031 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1032    instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1033    ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1034    statement.  */
1035 #define ASM_CV_QUAL(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1036 #define ASM_STRING(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1037 #define ASM_OUTPUTS(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1038 #define ASM_INPUTS(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1039 #define ASM_CLOBBERS(NODE)      TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1040
1041 /* DECL_STMT accessor. This gives access to the DECL associated with
1042    the given declaration statement.  */
1043 #define DECL_STMT_DECL(NODE)    TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1044
1045 /* STMT_EXPR accessor.  */
1046 #define STMT_EXPR_STMT(NODE)    TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1047
1048 /* Nonzero if this statement-expression does not have an associated scope.  */
1049 #define STMT_EXPR_NO_SCOPE(NODE) \
1050    TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1051
1052 /* LABEL_STMT accessor. This gives access to the label associated with
1053    the given label statement.  */
1054 #define LABEL_STMT_LABEL(NODE)  TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1055
1056 /* COMPOUND_LITERAL_EXPR accessors.  */
1057 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE)           \
1058   TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1059 #define COMPOUND_LITERAL_EXPR_DECL(NODE)                        \
1060   DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1061
1062 /* Nonzero if this SCOPE_STMT is for the beginning of a scope.  */
1063 #define SCOPE_BEGIN_P(NODE) \
1064   (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1065
1066 /* Nonzero if this SCOPE_STMT is for the end of a scope.  */
1067 #define SCOPE_END_P(NODE) \
1068   (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1069
1070 /* The BLOCK containing the declarations contained in this scope.  */
1071 #define SCOPE_STMT_BLOCK(NODE) \
1072   (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1073
1074 /* Nonzero for a SCOPE_STMT if there were no variables in this scope.  */
1075 #define SCOPE_NULLIFIED_P(NODE) \
1076   (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1077
1078 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1079    which should be treated as non-existent from the point of view of
1080    running cleanup actions.  */
1081 #define SCOPE_NO_CLEANUPS_P(NODE) \
1082   (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1083
1084 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1085    For example, in:
1086
1087      S s;
1088      l:
1089      S s2;
1090      goto l;
1091
1092    there is (implicitly) a new scope after `l', even though there are
1093    no curly braces.  In particular, when we hit the goto, we must
1094    destroy s2 and then re-construct it.  For the implicit scope,
1095    SCOPE_PARTIAL_P will be set.  */
1096 #define SCOPE_PARTIAL_P(NODE) \
1097   (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1098
1099 /* Nonzero for an ASM_STMT if the assembly statement is volatile.  */
1100 #define ASM_VOLATILE_P(NODE)                    \
1101   (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1102
1103 /* The VAR_DECL to clean up in a CLEANUP_STMT.  */
1104 #define CLEANUP_DECL(NODE) \
1105   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1106 /* The cleanup to run in a CLEANUP_STMT.  */
1107 #define CLEANUP_EXPR(NODE) \
1108   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1109
1110 /* The filename we are changing to as of this FILE_STMT.  */
1111 #define FILE_STMT_FILENAME_NODE(NODE) \
1112   (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1113 #define FILE_STMT_FILENAME(NODE) \
1114   (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1115
1116 /* The line-number at which a statement began.  But if
1117    STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1118    line number for the end of the current function instead.  */
1119 #define STMT_LINENO(NODE)                       \
1120   (TREE_COMPLEXITY ((NODE)))
1121
1122 /* If nonzero, the STMT_LINENO for NODE is the line at which the
1123    function ended.  */
1124 #define STMT_LINENO_FOR_FN_P(NODE)              \
1125   (TREE_LANG_FLAG_2 ((NODE)))
1126
1127 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1128    initialization variables.  */
1129 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1130
1131 /* Nonzero if we want to create an ASM_INPUT instead of an
1132    ASM_OPERAND with no operands.  */
1133 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1134
1135 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1136
1137 enum c_tree_code {
1138   C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1139 #include "c-common.def"
1140   LAST_C_TREE_CODE
1141 };
1142
1143 #undef DEFTREECODE
1144
1145 #define c_common_stmt_codes                             \
1146    CLEANUP_STMT,        EXPR_STMT,      COMPOUND_STMT,  \
1147    DECL_STMT,           IF_STMT,        FOR_STMT,       \
1148    WHILE_STMT,          DO_STMT,        RETURN_STMT,    \
1149    BREAK_STMT,          CONTINUE_STMT,  SCOPE_STMT,     \
1150    SWITCH_STMT,         GOTO_STMT,      LABEL_STMT,     \
1151    ASM_STMT,            FILE_STMT,      CASE_LABEL
1152
1153 /* TRUE if a code represents a statement.  The front end init
1154    langhook should take care of initialization of this array.  */
1155 extern bool statement_code_p[MAX_TREE_CODES];
1156
1157 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1158
1159 #define INIT_STATEMENT_CODES(STMT_CODES)                        \
1160   do {                                                          \
1161     unsigned int i;                                             \
1162     memset (&statement_code_p, 0, sizeof (statement_code_p));   \
1163     for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++)               \
1164       statement_code_p[STMT_CODES[i]] = true;                   \
1165   } while (0)
1166
1167 extern void genrtl_do_pushlevel (void);
1168 extern void genrtl_goto_stmt (tree);
1169 extern void genrtl_expr_stmt (tree);
1170 extern void genrtl_expr_stmt_value (tree, int, int);
1171 extern void genrtl_decl_stmt (tree);
1172 extern void genrtl_if_stmt (tree);
1173 extern void genrtl_while_stmt (tree);
1174 extern void genrtl_do_stmt (tree);
1175 extern void genrtl_return_stmt (tree);
1176 extern void genrtl_for_stmt (tree);
1177 extern void genrtl_break_stmt (void);
1178 extern void genrtl_continue_stmt (void);
1179 extern void genrtl_scope_stmt (tree);
1180 extern void genrtl_switch_stmt (tree);
1181 extern void genrtl_case_label (tree);
1182 extern void genrtl_compound_stmt (tree);
1183 extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1184 extern void genrtl_cleanup_stmt (tree);
1185 extern int stmts_are_full_exprs_p (void);
1186 extern int anon_aggr_type_p (tree);
1187
1188 /* For a VAR_DECL that is an anonymous union, these are the various
1189    sub-variables that make up the anonymous union.  */
1190 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1191
1192 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
1193 #define DECL_C_BIT_FIELD(NODE) \
1194   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1195 #define SET_DECL_C_BIT_FIELD(NODE) \
1196   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1197 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1198   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1199
1200 /* In a VAR_DECL, nonzero if the decl is a register variable with
1201    an explicit asm specification.  */
1202 #define DECL_C_HARD_REGISTER(DECL)  DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1203
1204 extern void emit_local_var (tree);
1205 extern void make_rtl_for_local_static (tree);
1206 extern tree expand_cond (tree);
1207 extern tree c_expand_return (tree);
1208 extern tree do_case (tree, tree);
1209 extern tree build_stmt (enum tree_code, ...);
1210 extern tree build_case_label (tree, tree, tree);
1211 extern tree build_continue_stmt (void);
1212 extern tree build_break_stmt (void);
1213 extern tree build_return_stmt (tree);
1214
1215 #define COMPOUND_STMT_NO_SCOPE(NODE)    TREE_LANG_FLAG_0 (NODE)
1216
1217 /* Used by the C++ frontend to mark the block around the member
1218    initializers and cleanups.  */
1219 #define COMPOUND_STMT_BODY_BLOCK(NODE)  TREE_LANG_FLAG_3 (NODE)
1220
1221 extern void c_expand_asm_operands (tree, tree, tree, tree, int, const char *, int);
1222
1223 /* These functions must be defined by each front-end which implements
1224    a variant of the C language.  They are used in c-common.c.  */
1225
1226 extern tree build_unary_op (enum tree_code, tree, int);
1227 extern tree build_binary_op (enum tree_code, tree, tree, int);
1228 extern int lvalue_p (tree);
1229 extern tree default_conversion (tree);
1230
1231 /* Given two integer or real types, return the type for their sum.
1232    Given two compatible ANSI C types, returns the merged type.  */
1233
1234 extern tree common_type (tree, tree);
1235
1236 extern tree expand_tree_builtin (tree, tree, tree);
1237
1238 extern tree decl_constant_value (tree);
1239
1240 /* Handle increment and decrement of boolean types.  */
1241 extern tree boolean_increment (enum tree_code, tree);
1242
1243 /* Hook currently used only by the C++ front end to reset internal state
1244    after entering or leaving a header file.  */
1245 extern void extract_interface_info (void);
1246
1247 extern int case_compare (splay_tree_key, splay_tree_key);
1248
1249 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1250
1251 extern tree build_function_call (tree, tree);
1252
1253 extern tree finish_label_address_expr (tree);
1254
1255 /* Same function prototype, but the C and C++ front ends have
1256    different implementations.  Used in c-common.c.  */
1257 extern tree lookup_label (tree);
1258
1259 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int);
1260
1261 extern int c_safe_from_p (rtx, tree);
1262
1263 extern int c_staticp (tree);
1264
1265 extern int c_common_unsafe_for_reeval (tree);
1266
1267 extern void init_c_lex (void);
1268
1269 extern void c_cpp_builtins (cpp_reader *);
1270
1271 /* Positive if an implicit `extern "C"' scope has just been entered;
1272    negative if such a scope has just been exited.  */
1273 extern int pending_lang_change;
1274
1275 /* Information recorded about each file examined during compilation.  */
1276
1277 struct c_fileinfo
1278 {
1279   int time;     /* Time spent in the file.  */
1280   short interface_only;         /* Flags - used only by C++ */
1281   short interface_unknown;
1282 };
1283
1284 struct c_fileinfo *get_fileinfo (const char *);
1285 extern void dump_time_statistics (void);
1286
1287 extern bool c_dump_tree (void *, tree);
1288
1289 extern void pch_init (void);
1290 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1291 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1292                                const char *orig);
1293 extern void c_common_write_pch (void);
1294 extern void c_common_no_more_pch (void);
1295 extern void builtin_define_with_value (const char *, const char *, int);
1296 extern void c_stddef_cpp_builtins (void);
1297 extern void fe_file_change (const struct line_map *);
1298 extern int c_estimate_num_insns (tree decl);
1299 extern bool c_decl_uninit (tree t);
1300
1301 /* In c-ppoutput.c  */
1302 extern void init_pp_output (FILE *);
1303 extern void preprocess_file (cpp_reader *);
1304 extern void pp_file_change (const struct line_map *);
1305
1306 #endif /* ! GCC_C_COMMON_H */