gcc/c-common.h

   1 /* Definitions for c-common.c.
   2    Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
   3    1999, 2000, 2001, 2002, 2003, 2004 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       STMT_EXPR_WARN_UNUSED_RESULT (in STMT_EXPR)
  44    4: SCOPE_PARTIAL_P (in SCOPE_STMT)
  45 */
  46
  47 /* Reserved identifiers.  This is the union of all the keywords for C,
  48    C++, and Objective-C.  All the type modifiers have to be in one
  49    block at the beginning, because they are used as mask bits.  There
  50    are 27 type modifiers; if we add many more we will have to redesign
  51    the mask mechanism.  */
  52
  53 enum rid
  54 {
  55   /* Modifiers: */
  56   /* C, in empirical order of frequency.  */
  57   RID_STATIC = 0,
  58   RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
  59   RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
  60   RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
  61
  62   /* C extensions */
  63   RID_COMPLEX, RID_THREAD,
  64
  65   /* C++ */
  66   RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
  67
  68   /* ObjC */
  69   RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
  70
  71   /* C */
  72   RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
  73   RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
  74   RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
  75   RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
  76   RID_SIZEOF,
  77
  78   /* C extensions */
  79   RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
  80   RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_PTRBASE,
  81   RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
  82
  83   /* Too many ways of getting the name of a function as a string */
  84   RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
  85
  86   /* C++ */
  87   RID_BOOL,     RID_WCHAR,    RID_CLASS,
  88   RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
  89   RID_TEMPLATE, RID_NULL,     RID_CATCH,
  90   RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
  91   RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
  92   RID_THIS,     RID_THROW,    RID_TRUE,
  93   RID_TRY,      RID_TYPENAME, RID_TYPEID,
  94   RID_USING,
  95
  96   /* casts */
  97   RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
  98
  99   /* Objective-C */
 100   RID_ID,          RID_AT_ENCODE,    RID_AT_END,
 101   RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
 102   RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
 103   RID_AT_PROTOCOL, RID_AT_SELECTOR,
 104   RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
 105   RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
 106   RID_AT_INTERFACE,
 107   RID_AT_IMPLEMENTATION,
 108
 109   RID_MAX,
 110
 111   RID_FIRST_MODIFIER = RID_STATIC,
 112   RID_LAST_MODIFIER = RID_ONEWAY,
 113
 114   RID_FIRST_AT = RID_AT_ENCODE,
 115   RID_LAST_AT = RID_AT_IMPLEMENTATION,
 116   RID_FIRST_PQ = RID_IN,
 117   RID_LAST_PQ = RID_ONEWAY
 118 };
 119
 120 #define OBJC_IS_AT_KEYWORD(rid) \
 121   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
 122    (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
 123
 124 #define OBJC_IS_PQ_KEYWORD(rid) \
 125   ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
 126    (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
 127
 128 /* The elements of `ridpointers' are identifier nodes for the reserved
 129    type names and storage classes.  It is indexed by a RID_... value.  */
 130 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
 131
 132 /* Standard named or nameless data types of the C compiler.  */
 133
 134 enum c_tree_index
 135 {
 136     CTI_WCHAR_TYPE,
 137     CTI_SIGNED_WCHAR_TYPE,
 138     CTI_UNSIGNED_WCHAR_TYPE,
 139     CTI_WINT_TYPE,
 140     CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
 141     CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
 142     CTI_INTMAX_TYPE,
 143     CTI_UINTMAX_TYPE,
 144     CTI_WIDEST_INT_LIT_TYPE,
 145     CTI_WIDEST_UINT_LIT_TYPE,
 146
 147     CTI_CHAR_ARRAY_TYPE,
 148     CTI_WCHAR_ARRAY_TYPE,
 149     CTI_INT_ARRAY_TYPE,
 150     CTI_STRING_TYPE,
 151     CTI_CONST_STRING_TYPE,
 152
 153     /* Type for boolean expressions (bool in C++, int in C).  */
 154     CTI_TRUTHVALUE_TYPE,
 155     CTI_TRUTHVALUE_TRUE,
 156     CTI_TRUTHVALUE_FALSE,
 157
 158     CTI_DEFAULT_FUNCTION_TYPE,
 159
 160     CTI_G77_INTEGER_TYPE,
 161     CTI_G77_UINTEGER_TYPE,
 162     CTI_G77_LONGINT_TYPE,
 163     CTI_G77_ULONGINT_TYPE,
 164
 165     /* These are not types, but we have to look them up all the time.  */
 166     CTI_FUNCTION_NAME_DECL,
 167     CTI_PRETTY_FUNCTION_NAME_DECL,
 168     CTI_C99_FUNCTION_NAME_DECL,
 169     CTI_SAVED_FUNCTION_NAME_DECLS,
 170
 171     CTI_VOID_ZERO,
 172
 173     CTI_MAX
 174 };
 175
 176 #define C_RID_CODE(id)  (((struct c_common_identifier *) (id))->node.rid_code)
 177
 178 /* Identifier part common to the C front ends.  Inherits from
 179    tree_identifier, despite appearances.  */
 180 struct c_common_identifier GTY(())
 181 {
 182   struct tree_common common;
 183   struct cpp_hashnode node;
 184 };
 185
 186 #define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
 187 #define signed_wchar_type_node          c_global_trees[CTI_SIGNED_WCHAR_TYPE]
 188 #define unsigned_wchar_type_node        c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
 189 #define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
 190 #define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
 191 #define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
 192 #define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
 193 #define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
 194 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
 195 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
 196
 197 #define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
 198 #define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
 199 #define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
 200
 201 #define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
 202 #define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
 203 #define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
 204 #define string_type_node                c_global_trees[CTI_STRING_TYPE]
 205 #define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
 206
 207 #define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
 208
 209 /* g77 integer types, which must be kept in sync with f/com.h */
 210 #define g77_integer_type_node           c_global_trees[CTI_G77_INTEGER_TYPE]
 211 #define g77_uinteger_type_node          c_global_trees[CTI_G77_UINTEGER_TYPE]
 212 #define g77_longint_type_node           c_global_trees[CTI_G77_LONGINT_TYPE]
 213 #define g77_ulongint_type_node          c_global_trees[CTI_G77_ULONGINT_TYPE]
 214
 215 #define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
 216 #define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
 217 #define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
 218 #define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
 219
 220 /* A node for `((void) 0)'.  */
 221 #define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
 222
 223 extern GTY(()) tree c_global_trees[CTI_MAX];
 224
 225 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
 226    tree for size reasons.  */
 227 struct sorted_fields_type GTY(())
 228 {
 229   int len;
 230   tree GTY((length ("%h.len"))) elts[1];
 231 };
 232
 233 /* Mark which labels are explicitly declared.
 234    These may be shadowed, and may be referenced from nested functions.  */
 235 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
 236
 237 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
 238    warning if they undergo concatenation.  */
 239 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
 240
 241 typedef enum c_language_kind
 242 {
 243   clk_c         = 0,            /* C90, C94 or C99 */
 244   clk_objc      = 1,            /* clk_c with ObjC features.  */
 245   clk_cxx       = 2,            /* ANSI/ISO C++ */
 246   clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
 247 }
 248 c_language_kind;
 249
 250 /* To test for a specific language use c_language, defined by each
 251    front end.  For "ObjC features" or "not C++" use the macros.  */
 252 extern c_language_kind c_language;
 253
 254 #define c_dialect_cxx()         (c_language & clk_cxx)
 255 #define c_dialect_objc()        (c_language & clk_objc)
 256
 257 /* Information about a statement tree.  */
 258
 259 struct stmt_tree_s GTY(()) {
 260   /* The last statement added to the tree.  */
 261   tree x_last_stmt;
 262   /* The type of the last expression statement.  (This information is
 263      needed to implement the statement-expression extension.)  */
 264   tree x_last_expr_type;
 265   /* The last filename we recorded.  */
 266   const char *x_last_expr_filename;
 267   /* In C++, Nonzero if we should treat statements as full
 268      expressions.  In particular, this variable is no-zero if at the
 269      end of a statement we should destroy any temporaries created
 270      during that statement.  Similarly, if, at the end of a block, we
 271      should destroy any local variables in this block.  Normally, this
 272      variable is nonzero, since those are the normal semantics of
 273      C++.
 274
 275      However, in order to represent aggregate initialization code as
 276      tree structure, we use statement-expressions.  The statements
 277      within the statement expression should not result in cleanups
 278      being run until the entire enclosing statement is complete.
 279
 280      This flag has no effect in C.  */
 281   int stmts_are_full_exprs_p;
 282 };
 283
 284 typedef struct stmt_tree_s *stmt_tree;
 285
 286 /* Global state pertinent to the current function.  Some C dialects
 287    extend this structure with additional fields.  */
 288
 289 struct c_language_function GTY(()) {
 290   /* While we are parsing the function, this contains information
 291      about the statement-tree that we are building.  */
 292   struct stmt_tree_s x_stmt_tree;
 293   /* The stack of SCOPE_STMTs for the current function.  */
 294   tree x_scope_stmt_stack;
 295 };
 296
 297 /* When building a statement-tree, this is the last statement added to
 298    the tree.  */
 299
 300 #define last_tree (current_stmt_tree ()->x_last_stmt)
 301
 302 /* The type of the last expression-statement we have seen.  */
 303
 304 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
 305
 306 /* The name of the last file we have seen.  */
 307
 308 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
 309
 310 /* LAST_TREE contains the last statement parsed.  These are chained
 311    together through the TREE_CHAIN field, but often need to be
 312    re-organized since the parse is performed bottom-up.  This macro
 313    makes LAST_TREE the indicated SUBSTMT of STMT.  */
 314
 315 #define RECHAIN_STMTS(stmt, substmt)            \
 316   do {                                          \
 317     substmt = TREE_CHAIN (stmt);                \
 318     TREE_CHAIN (stmt) = NULL_TREE;              \
 319     last_tree = stmt;                           \
 320   } while (0)
 321
 322 /* Language-specific hooks.  */
 323
 324 extern void (*lang_expand_stmt) (tree);
 325 extern void (*lang_expand_decl_stmt) (tree);
 326 extern void (*lang_expand_function_end) (void);
 327
 328 /* Callback that determines if it's ok for a function to have no
 329    noreturn attribute.  */
 330 extern int (*lang_missing_noreturn_ok_p) (tree);
 331
 332 extern int yyparse (void);
 333 extern stmt_tree current_stmt_tree (void);
 334 extern tree *current_scope_stmt_stack (void);
 335 extern void begin_stmt_tree (tree *);
 336 extern tree add_stmt (tree);
 337 extern void add_decl_stmt (tree);
 338 extern tree add_scope_stmt (int, int);
 339 extern void finish_stmt_tree (tree *);
 340
 341 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
 342 extern void prep_stmt (tree);
 343 extern void expand_stmt (tree);
 344 extern tree c_begin_if_stmt (void);
 345 extern tree c_begin_while_stmt (void);
 346 extern void c_finish_while_stmt_cond (tree, tree);
 347
 348 extern int field_decl_cmp (const void *, const void *);
 349 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 350                                   void *);
 351 \f
 352 /* Switches common to the C front ends.  */
 353
 354 /* Nonzero if prepreprocessing only.  */
 355
 356 extern int flag_preprocess_only;
 357
 358 /* Zero means that faster, ...NonNil variants of objc_msgSend...
 359    calls will be used in ObjC; passing nil receivers to such calls
 360    will most likely result in crashes.  */
 361 extern int flag_nil_receivers;
 362
 363 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
 364    @try, etc.) in source code.  */
 365 extern int flag_objc_exceptions;
 366
 367 /* Nonzero means that code generation will be altered to support
 368    "zero-link" execution.  This currently affects ObjC only, but may
 369    affect other languages in the future.  */
 370 extern int flag_zero_link;
 371
 372 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
 373    unit.  It will inform the ObjC runtime that class definition(s) herein
 374    contained are to replace one(s) previously loaded.  */
 375 extern int flag_replace_objc_classes;
 376
 377 /* Nonzero means don't output line number information.  */
 378
 379 extern char flag_no_line_commands;
 380
 381 /* Nonzero causes -E output not to be done, but directives such as
 382    #define that have side effects are still obeyed.  */
 383
 384 extern char flag_no_output;
 385
 386 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
 387    'N' of the command line switch.  */
 388
 389 extern char flag_dump_macros;
 390
 391 /* Nonzero means pass #include lines through to the output.  */
 392
 393 extern char flag_dump_includes;
 394
 395 /* The file name to which we should write a precompiled header, or
 396    NULL if no header will be written in this compile.  */
 397
 398 extern const char *pch_file;
 399
 400 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 401    user's namespace.  */
 402
 403 extern int flag_iso;
 404
 405 /* Nonzero if -undef was given.  It suppresses target built-in macros
 406    and assertions.  */
 407
 408 extern int flag_undef;
 409
 410 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 411
 412 extern int flag_no_builtin;
 413
 414 /* Nonzero means don't recognize the non-ANSI builtin functions.
 415    -ansi sets this.  */
 416
 417 extern int flag_no_nonansi_builtin;
 418
 419 /* Nonzero means give `double' the same size as `float'.  */
 420
 421 extern int flag_short_double;
 422
 423 /* Nonzero means give `wchar_t' the same size as `short'.  */
 424
 425 extern int flag_short_wchar;
 426
 427 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 428 extern int flag_ms_extensions;
 429
 430 /* Nonzero means don't recognize the keyword `asm'.  */
 431
 432 extern int flag_no_asm;
 433
 434 /* Nonzero means give string constants the type `const char *', as mandated
 435    by the standard.  */
 436
 437 extern int flag_const_strings;
 438
 439 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 440
 441 extern int flag_signed_bitfields;
 442 extern int explicit_flag_signed_bitfields;
 443
 444 /* Nonzero means warn about pointer casts that can drop a type qualifier
 445    from the pointer target type.  */
 446
 447 extern int warn_cast_qual;
 448
 449 /* Warn about functions which might be candidates for format attributes.  */
 450
 451 extern int warn_missing_format_attribute;
 452
 453 /* Nonzero means warn about sizeof(function) or addition/subtraction
 454    of function pointers.  */
 455
 456 extern int warn_pointer_arith;
 457
 458 /* Nonzero means warn for any global function def
 459    without separate previous prototype decl.  */
 460
 461 extern int warn_missing_prototypes;
 462
 463 /* Warn if adding () is suggested.  */
 464
 465 extern int warn_parentheses;
 466
 467 /* Warn if initializer is not completely bracketed.  */
 468
 469 extern int warn_missing_braces;
 470
 471 /* Warn about comparison of signed and unsigned values.
 472    If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified.  */
 473
 474 extern int warn_sign_compare;
 475
 476 /* Nonzero means warn about usage of long long when `-pedantic'.  */
 477
 478 extern int warn_long_long;
 479
 480 /* Nonzero means warn about deprecated conversion from string constant to
 481    `char *'.  */
 482
 483 extern int warn_write_strings;
 484
 485 /* Nonzero means warn about multiple (redundant) decls for the same single
 486    variable or function.  */
 487
 488 extern int warn_redundant_decls;
 489
 490 /* Warn about testing equality of floating point numbers.  */
 491
 492 extern int warn_float_equal;
 493
 494 /* Warn about a subscript that has type char.  */
 495
 496 extern int warn_char_subscripts;
 497
 498 /* Warn if a type conversion is done that might have confusing results.  */
 499
 500 extern int warn_conversion;
 501
 502 /* Warn about #pragma directives that are not recognized.  */
 503
 504 extern int warn_unknown_pragmas; /* Tri state variable.  */
 505
 506 /* Warn about format/argument anomalies in calls to formatted I/O functions
 507    (*printf, *scanf, strftime, strfmon, etc.).  */
 508
 509 extern int warn_format;
 510
 511 /* Warn about Y2K problems with strftime formats.  */
 512
 513 extern int warn_format_y2k;
 514
 515 /* Warn about excess arguments to formats.  */
 516
 517 extern int warn_format_extra_args;
 518
 519 /* Warn about zero-length formats.  */
 520
 521 extern int warn_format_zero_length;
 522
 523 /* Warn about non-literal format arguments.  */
 524
 525 extern int warn_format_nonliteral;
 526
 527 /* Warn about possible security problems with calls to format functions.  */
 528
 529 extern int warn_format_security;
 530
 531
 532 /* C/ObjC language option variables.  */
 533
 534
 535 /* Nonzero means message about use of implicit function declarations;
 536  1 means warning; 2 means error.  */
 537
 538 extern int mesg_implicit_function_declaration;
 539
 540 /* Nonzero means allow type mismatches in conditional expressions;
 541    just make their values `void'.  */
 542
 543 extern int flag_cond_mismatch;
 544
 545 /* Nonzero means enable C89 Amendment 1 features.  */
 546
 547 extern int flag_isoc94;
 548
 549 /* Nonzero means use the ISO C99 dialect of C.  */
 550
 551 extern int flag_isoc99;
 552
 553 /* Nonzero means that we have builtin functions, and main is an int.  */
 554
 555 extern int flag_hosted;
 556
 557 /* Nonzero means warn when casting a function call to a type that does
 558    not match the return type (e.g. (float)sqrt() or (anything*)malloc()
 559    when there is no previous declaration of sqrt or malloc.  */
 560
 561 extern int warn_bad_function_cast;
 562
 563 /* Warn about traditional constructs whose meanings changed in ANSI C.  */
 564
 565 extern int warn_traditional;
 566
 567 /* Nonzero means warn for a declaration found after a statement.  */
 568
 569 extern int warn_declaration_after_statement;
 570
 571 /* Nonzero means warn for non-prototype function decls
 572    or non-prototyped defs without previous prototype.  */
 573
 574 extern int warn_strict_prototypes;
 575
 576 /* Nonzero means warn for any global function def
 577    without separate previous decl.  */
 578
 579 extern int warn_missing_declarations;
 580
 581 /* Nonzero means warn about extern declarations of objects not at
 582    file-scope level and about *all* declarations of functions (whether
 583    extern or static) not at file-scope level.  Note that we exclude
 584    implicit function declarations.  To get warnings about those, use
 585    -Wimplicit.  */
 586
 587 extern int warn_nested_externs;
 588
 589 /* Warn if main is suspicious.  */
 590
 591 extern int warn_main;
 592
 593 /* Nonzero means warn about possible violations of sequence point rules.  */
 594
 595 extern int warn_sequence_point;
 596
 597 /* Nonzero means warn about uninitialized variable when it is initialized with itself.
 598    For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero.  */
 599
 600 extern int warn_init_self;
 601
 602
 603 /* Nonzero means to warn about compile-time division by zero.  */
 604 extern int warn_div_by_zero;
 605
 606 /* Nonzero means warn about use of implicit int.  */
 607
 608 extern int warn_implicit_int;
 609
 610 /* Warn about NULL being passed to argument slots marked as requiring
 611    non-NULL.  */
 612
 613 extern int warn_nonnull;
 614
 615 /* Warn about old-style parameter declaration.  */
 616
 617 extern int warn_old_style_definition;
 618
 619
 620 /* ObjC language option variables.  */
 621
 622
 623 /* Open and close the file for outputting class declarations, if
 624    requested (ObjC).  */
 625
 626 extern int flag_gen_declaration;
 627
 628 /* Generate code for GNU or NeXT runtime environment.  */
 629
 630 extern int flag_next_runtime;
 631
 632 /* Tells the compiler that this is a special run.  Do not perform any
 633    compiling, instead we are to test some platform dependent features
 634    and output a C header file with appropriate definitions.  */
 635
 636 extern int print_struct_values;
 637
 638 /* ???.  Undocumented.  */
 639
 640 extern const char *constant_string_class_name;
 641
 642 /* Warn if multiple methods are seen for the same selector, but with
 643    different argument types.  Performs the check on the whole selector
 644    table at the end of compilation.  */
 645
 646 extern int warn_selector;
 647
 648 /* Warn if a @selector() is found, and no method with that selector
 649    has been previously declared.  The check is done on each
 650    @selector() as soon as it is found - so it warns about forward
 651    declarations.  */
 652
 653 extern int warn_undeclared_selector;
 654
 655 /* Warn if methods required by a protocol are not implemented in the
 656    class adopting it.  When turned off, methods inherited to that
 657    class are also considered implemented.  */
 658
 659 extern int warn_protocol;
 660
 661
 662 /* C++ language option variables.  */
 663
 664
 665 /* Nonzero means don't recognize any extension keywords.  */
 666
 667 extern int flag_no_gnu_keywords;
 668
 669 /* Nonzero means do emit exported implementations of functions even if
 670    they can be inlined.  */
 671
 672 extern int flag_implement_inlines;
 673
 674 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 675
 676 extern int flag_implicit_templates;
 677
 678 /* Nonzero means that implicit instantiations of inline templates will be
 679    emitted if needed, even if instantiations of non-inline templates
 680    aren't.  */
 681
 682 extern int flag_implicit_inline_templates;
 683
 684 /* Nonzero means generate separate instantiation control files and
 685    juggle them at link time.  */
 686
 687 extern int flag_use_repository;
 688
 689 /* Nonzero if we want to issue diagnostics that the standard says are not
 690    required.  */
 691
 692 extern int flag_optional_diags;
 693
 694 /* Nonzero means we should attempt to elide constructors when possible.  */
 695
 696 extern int flag_elide_constructors;
 697
 698 /* Nonzero means that member functions defined in class scope are
 699    inline by default.  */
 700
 701 extern int flag_default_inline;
 702
 703 /* Controls whether compiler generates 'type descriptor' that give
 704    run-time type information.  */
 705
 706 extern int flag_rtti;
 707
 708 /* Nonzero if we want to conserve space in the .o files.  We do this
 709    by putting uninitialized data and runtime initialized data into
 710    .common instead of .data at the expense of not flagging multiple
 711    definitions.  */
 712
 713 extern int flag_conserve_space;
 714
 715 /* Nonzero if we want to obey access control semantics.  */
 716
 717 extern int flag_access_control;
 718
 719 /* Nonzero if we want to check the return value of new and avoid calling
 720    constructors if it is a null pointer.  */
 721
 722 extern int flag_check_new;
 723
 724 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 725    initialization variables.
 726    0: Old rules, set by -fno-for-scope.
 727    2: New ISO rules, set by -ffor-scope.
 728    1: Try to implement new ISO rules, but with backup compatibility
 729    (and warnings).  This is the default, for now.  */
 730
 731 extern int flag_new_for_scope;
 732
 733 /* Nonzero if we want to emit defined symbols with common-like linkage as
 734    weak symbols where possible, in order to conform to C++ semantics.
 735    Otherwise, emit them as local symbols.  */
 736
 737 extern int flag_weak;
 738
 739 /* 0 means we want the preprocessor to not emit line directives for
 740    the current working directory.  1 means we want it to do it.  -1
 741    means we should decide depending on whether debugging information
 742    is being emitted or not.  */
 743
 744 extern int flag_working_directory;
 745
 746 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 747    destructors for local statics and global objects.  */
 748
 749 extern int flag_use_cxa_atexit;
 750
 751 /* Nonzero means make the default pedwarns warnings instead of errors.
 752    The value of this flag is ignored if -pedantic is specified.  */
 753
 754 extern int flag_permissive;
 755
 756 /* Nonzero means to implement standard semantics for exception
 757    specifications, calling unexpected if an exception is thrown that
 758    doesn't match the specification.  Zero means to treat them as
 759    assertions and optimize accordingly, but not check them.  */
 760
 761 extern int flag_enforce_eh_specs;
 762
 763 /* Nonzero means warn about things that will change when compiling
 764    with an ABI-compliant compiler.  */
 765
 766 extern int warn_abi;
 767
 768 /* Nonzero means warn about invalid uses of offsetof.  */
 769
 770 extern int warn_invalid_offsetof;
 771
 772 /* Nonzero means warn about implicit declarations.  */
 773
 774 extern int warn_implicit;
 775
 776 /* Nonzero means warn when all ctors or dtors are private, and the class
 777    has no friends.  */
 778
 779 extern int warn_ctor_dtor_privacy;
 780
 781 /* Nonzero means warn in function declared in derived class has the
 782    same name as a virtual in the base class, but fails to match the
 783    type signature of any virtual function in the base class.  */
 784
 785 extern int warn_overloaded_virtual;
 786
 787 /* Nonzero means warn when declaring a class that has a non virtual
 788    destructor, when it really ought to have a virtual one.  */
 789
 790 extern int warn_nonvdtor;
 791
 792 /* Nonzero means warn when the compiler will reorder code.  */
 793
 794 extern int warn_reorder;
 795
 796 /* Nonzero means warn when synthesis behavior differs from Cfront's.  */
 797
 798 extern int warn_synth;
 799
 800 /* Nonzero means warn when we convert a pointer to member function
 801    into a pointer to (void or function).  */
 802
 803 extern int warn_pmf2ptr;
 804
 805 /* Nonzero means warn about violation of some Effective C++ style rules.  */
 806
 807 extern int warn_ecpp;
 808
 809 /* Nonzero means warn where overload resolution chooses a promotion from
 810    unsigned to signed over a conversion to an unsigned of the same size.  */
 811
 812 extern int warn_sign_promo;
 813
 814 /* Nonzero means warn when an old-style cast is used.  */
 815
 816 extern int warn_old_style_cast;
 817
 818 /* Nonzero means warn when non-templatized friend functions are
 819    declared within a template */
 820
 821 extern int warn_nontemplate_friend;
 822
 823 /* Nonzero means complain about deprecated features.  */
 824
 825 extern int warn_deprecated;
 826
 827 /* Maximum template instantiation depth.  This limit is rather
 828    arbitrary, but it exists to limit the time it takes to notice
 829    infinite template instantiations.  */
 830
 831 extern int max_tinst_depth;
 832
 833 /* Nonzero means the expression being parsed will never be evaluated.
 834    This is a count, since unevaluated expressions can nest.  */
 835
 836 extern int skip_evaluation;
 837
 838 /* C types are partitioned into three subsets: object, function, and
 839    incomplete types.  */
 840 #define C_TYPE_OBJECT_P(type) \
 841   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 842
 843 #define C_TYPE_INCOMPLETE_P(type) \
 844   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 845
 846 #define C_TYPE_FUNCTION_P(type) \
 847   (TREE_CODE (type) == FUNCTION_TYPE)
 848
 849 /* For convenience we define a single macro to identify the class of
 850    object or incomplete types.  */
 851 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 852   (!C_TYPE_FUNCTION_P (type))
 853
 854 /* Record in each node resulting from a binary operator
 855    what operator was specified for it.  */
 856 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
 857
 858 /* Attribute table common to the C front ends.  */
 859 extern const struct attribute_spec c_common_attribute_table[];
 860 extern const struct attribute_spec c_common_format_attribute_table[];
 861
 862 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 863    ID is the identifier to use, NAME is the string.
 864    TYPE_DEP indicates whether it depends on type of the function or not
 865    (i.e. __PRETTY_FUNCTION__).  */
 866
 867 extern tree (*make_fname_decl) (tree, int);
 868
 869 extern tree identifier_global_value (tree);
 870 extern void record_builtin_type (enum rid, const char *, tree);
 871 extern tree build_void_list_node (void);
 872 extern void start_fname_decls (void);
 873 extern void finish_fname_decls (void);
 874 extern const char *fname_as_string (int);
 875 extern tree fname_decl (unsigned, tree);
 876
 877 extern void check_function_arguments (tree, tree);
 878 extern void check_function_arguments_recurse (void (*)
 879                                               (void *, tree,
 880                                                unsigned HOST_WIDE_INT),
 881                                               void *, tree,
 882                                               unsigned HOST_WIDE_INT);
 883 extern void check_function_format (int *, tree, tree);
 884 extern void set_Wformat (int);
 885 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 886 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 887 extern int c_common_handle_option (size_t code, const char *arg, int value);
 888 extern bool c_common_missing_argument (const char *opt, size_t code);
 889 extern tree c_common_type_for_mode (enum machine_mode, int);
 890 extern tree c_common_type_for_size (unsigned int, int);
 891 extern tree c_common_unsigned_type (tree);
 892 extern tree c_common_signed_type (tree);
 893 extern tree c_common_signed_or_unsigned_type (int, tree);
 894 extern tree c_common_truthvalue_conversion (tree);
 895 extern void c_apply_type_quals_to_decl (int, tree);
 896 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
 897 extern tree c_alignof_expr (tree);
 898 /* Print an error message for invalid operands to arith operation CODE.
 899    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 900 extern void binary_op_error (enum tree_code);
 901 #define my_friendly_assert(EXP, N) (void) \
 902  (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
 903
 904 extern tree c_expand_expr_stmt (tree);
 905 extern void c_expand_start_cond (tree, int, tree);
 906 extern void c_finish_then (void);
 907 extern void c_expand_start_else (void);
 908 extern void c_finish_else (void);
 909 extern void c_expand_end_cond (void);
 910 /* Validate the expression after `case' and apply default promotions.  */
 911 extern tree check_case_value (tree);
 912 extern tree fix_string_type (tree);
 913 struct varray_head_tag;
 914 extern void constant_expression_warning (tree);
 915 extern tree convert_and_check (tree, tree);
 916 extern void overflow_warning (tree);
 917 extern void unsigned_conversion_warning (tree, tree);
 918
 919 #define c_sizeof(T)  c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
 920 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
 921
 922 /* Subroutine of build_binary_op, used for comparison operations.
 923    See if the operands have both been converted from subword integer types
 924    and, if so, perhaps change them both back to their original type.  */
 925 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 926
 927 extern tree pointer_int_sum (enum tree_code, tree, tree);
 928 extern unsigned int min_precision (tree, int);
 929
 930 /* Add qualifiers to a type, in the fashion for C.  */
 931 extern tree c_build_qualified_type (tree, int);
 932
 933 /* Build tree nodes and builtin functions common to both C and C++ language
 934    frontends.  */
 935 extern void c_common_nodes_and_builtins (void);
 936
 937 extern void disable_builtin_function (const char *);
 938
 939 extern tree build_va_arg (tree, tree);
 940
 941 extern unsigned int c_common_init_options (unsigned int, const char **);
 942 extern bool c_common_post_options (const char **);
 943 extern bool c_common_init (void);
 944 extern void c_common_finish (void);
 945 extern void c_common_parse_file (int);
 946 extern HOST_WIDE_INT c_common_get_alias_set (tree);
 947 extern void c_register_builtin_type (tree, const char*);
 948 extern bool c_promoting_integer_type_p (tree);
 949 extern int self_promoting_args_p (tree);
 950 extern tree strip_array_types (tree);
 951 extern tree strip_pointer_operator (tree);
 952
 953 /* This function resets the parsers' state in preparation for parsing
 954    a new file.  */
 955 extern void c_reset_state (void);
 956 /* This is the basic parsing function.  */
 957 extern void c_parse_file (void);
 958 /* This is misnamed, it actually performs end-of-compilation processing.  */
 959 extern void finish_file (void);
 960
 961 /* These macros provide convenient access to the various _STMT nodes.  */
 962
 963 /* Nonzero if this statement should be considered a full-expression,
 964    i.e., if temporaries created during this statement should have
 965    their destructors run at the end of this statement.  (In C, this
 966    will always be false, since there are no destructors.)  */
 967 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
 968
 969 /* IF_STMT accessors. These give access to the condition of the if
 970    statement, the then block of the if statement, and the else block
 971    of the if statement if it exists.  */
 972 #define IF_COND(NODE)           TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
 973 #define THEN_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
 974 #define ELSE_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
 975
 976 /* WHILE_STMT accessors. These give access to the condition of the
 977    while statement and the body of the while statement, respectively.  */
 978 #define WHILE_COND(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
 979 #define WHILE_BODY(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
 980
 981 /* DO_STMT accessors. These give access to the condition of the do
 982    statement and the body of the do statement, respectively.  */
 983 #define DO_COND(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
 984 #define DO_BODY(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
 985
 986 /* RETURN_STMT accessors. These give the expression associated with a
 987    return statement, and whether it should be ignored when expanding
 988    (as opposed to inlining).  */
 989 #define RETURN_STMT_EXPR(NODE)  TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
 990
 991 /* EXPR_STMT accessor. This gives the expression associated with an
 992    expression statement.  */
 993 #define EXPR_STMT_EXPR(NODE)    TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
 994
 995 /* FOR_STMT accessors. These give access to the init statement,
 996    condition, update expression, and body of the for statement,
 997    respectively.  */
 998 #define FOR_INIT_STMT(NODE)     TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
 999 #define FOR_COND(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1000 #define FOR_EXPR(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1001 #define FOR_BODY(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1002
1003 /* SWITCH_STMT accessors. These give access to the condition, body and
1004    original condition type (before any compiler conversions)
1005    of the switch statement, respectively.  */
1006 #define SWITCH_COND(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1007 #define SWITCH_BODY(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1008 #define SWITCH_TYPE(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1009
1010 /* CASE_LABEL accessors. These give access to the high and low values
1011    of a case label, respectively.  */
1012 #define CASE_LOW(NODE)          TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1013 #define CASE_HIGH(NODE)         TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1014 #define CASE_LABEL_DECL(NODE)   TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1015
1016 /* GOTO_STMT accessor. This gives access to the label associated with
1017    a goto statement.  */
1018 #define GOTO_DESTINATION(NODE)  TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1019 /* True for goto created artificially by the compiler.  */
1020 #define GOTO_FAKE_P(NODE)       (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1021
1022 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1023    statements associated with a compound statement. The result is the
1024    first statement in the list. Succeeding nodes can be accessed by
1025    calling TREE_CHAIN on a node in the list.  */
1026 #define COMPOUND_BODY(NODE)     TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1027
1028 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1029    instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1030    ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1031    statement.  */
1032 #define ASM_CV_QUAL(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1033 #define ASM_STRING(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1034 #define ASM_OUTPUTS(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1035 #define ASM_INPUTS(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1036 #define ASM_CLOBBERS(NODE)      TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1037
1038 /* DECL_STMT accessor. This gives access to the DECL associated with
1039    the given declaration statement.  */
1040 #define DECL_STMT_DECL(NODE)    TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1041
1042 /* STMT_EXPR accessor.  */
1043 #define STMT_EXPR_STMT(NODE)    TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1044
1045 /* Nonzero if this statement-expression does not have an associated scope.  */
1046 #define STMT_EXPR_NO_SCOPE(NODE) \
1047    TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1048
1049 /* Nonzero if this statement-expression should cause warning if its result
1050    is not used.  */
1051 #define STMT_EXPR_WARN_UNUSED_RESULT(NODE) \
1052    TREE_LANG_FLAG_3 (STMT_EXPR_CHECK (NODE))
1053
1054 /* LABEL_STMT accessor. This gives access to the label associated with
1055    the given label statement.  */
1056 #define LABEL_STMT_LABEL(NODE)  TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1057
1058 /* COMPOUND_LITERAL_EXPR accessors.  */
1059 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE)           \
1060   TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1061 #define COMPOUND_LITERAL_EXPR_DECL(NODE)                        \
1062   DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1063
1064 /* Nonzero if this SCOPE_STMT is for the beginning of a scope.  */
1065 #define SCOPE_BEGIN_P(NODE) \
1066   (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1067
1068 /* Nonzero if this SCOPE_STMT is for the end of a scope.  */
1069 #define SCOPE_END_P(NODE) \
1070   (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1071
1072 /* The BLOCK containing the declarations contained in this scope.  */
1073 #define SCOPE_STMT_BLOCK(NODE) \
1074   (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1075
1076 /* Nonzero for a SCOPE_STMT if there were no variables in this scope.  */
1077 #define SCOPE_NULLIFIED_P(NODE) \
1078   (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1079
1080 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1081    which should be treated as non-existent from the point of view of
1082    running cleanup actions.  */
1083 #define SCOPE_NO_CLEANUPS_P(NODE) \
1084   (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1085
1086 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1087    For example, in:
1088
1089      S s;
1090      l:
1091      S s2;
1092      goto l;
1093
1094    there is (implicitly) a new scope after `l', even though there are
1095    no curly braces.  In particular, when we hit the goto, we must
1096    destroy s2 and then re-construct it.  For the implicit scope,
1097    SCOPE_PARTIAL_P will be set.  */
1098 #define SCOPE_PARTIAL_P(NODE) \
1099   (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1100
1101 /* Nonzero for an ASM_STMT if the assembly statement is volatile.  */
1102 #define ASM_VOLATILE_P(NODE)                    \
1103   (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1104
1105 /* The VAR_DECL to clean up in a CLEANUP_STMT.  */
1106 #define CLEANUP_DECL(NODE) \
1107   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1108 /* The cleanup to run in a CLEANUP_STMT.  */
1109 #define CLEANUP_EXPR(NODE) \
1110   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1111
1112 /* The filename we are changing to as of this FILE_STMT.  */
1113 #define FILE_STMT_FILENAME_NODE(NODE) \
1114   (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1115 #define FILE_STMT_FILENAME(NODE) \
1116   (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1117
1118 /* The line-number at which a statement began.  But if
1119    STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1120    line number for the end of the current function instead.  */
1121 #define STMT_LINENO(NODE)                       \
1122   (TREE_COMPLEXITY ((NODE)))
1123
1124 /* If nonzero, the STMT_LINENO for NODE is the line at which the
1125    function ended.  */
1126 #define STMT_LINENO_FOR_FN_P(NODE)              \
1127   (TREE_LANG_FLAG_2 ((NODE)))
1128
1129 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1130    initialization variables.  */
1131 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1132
1133 /* Nonzero if we want to create an ASM_INPUT instead of an
1134    ASM_OPERAND with no operands.  */
1135 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1136
1137 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1138
1139 enum c_tree_code {
1140   C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1141 #include "c-common.def"
1142   LAST_C_TREE_CODE
1143 };
1144
1145 #undef DEFTREECODE
1146
1147 #define c_common_stmt_codes                             \
1148    CLEANUP_STMT,        EXPR_STMT,      COMPOUND_STMT,  \
1149    DECL_STMT,           IF_STMT,        FOR_STMT,       \
1150    WHILE_STMT,          DO_STMT,        RETURN_STMT,    \
1151    BREAK_STMT,          CONTINUE_STMT,  SCOPE_STMT,     \
1152    SWITCH_STMT,         GOTO_STMT,      LABEL_STMT,     \
1153    ASM_STMT,            FILE_STMT,      CASE_LABEL
1154
1155 /* TRUE if a code represents a statement.  The front end init
1156    langhook should take care of initialization of this array.  */
1157 extern bool statement_code_p[MAX_TREE_CODES];
1158
1159 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1160
1161 #define INIT_STATEMENT_CODES(STMT_CODES)                        \
1162   do {                                                          \
1163     unsigned int i;                                             \
1164     memset (&statement_code_p, 0, sizeof (statement_code_p));   \
1165     for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++)               \
1166       statement_code_p[STMT_CODES[i]] = true;                   \
1167   } while (0)
1168
1169 extern void genrtl_do_pushlevel (void);
1170 extern void genrtl_goto_stmt (tree);
1171 extern void genrtl_expr_stmt (tree);
1172 extern void genrtl_expr_stmt_value (tree, int, int);
1173 extern void genrtl_decl_stmt (tree);
1174 extern void genrtl_if_stmt (tree);
1175 extern void genrtl_while_stmt (tree);
1176 extern void genrtl_do_stmt (tree);
1177 extern void genrtl_return_stmt (tree);
1178 extern void genrtl_for_stmt (tree);
1179 extern void genrtl_break_stmt (void);
1180 extern void genrtl_continue_stmt (void);
1181 extern void genrtl_scope_stmt (tree);
1182 extern void genrtl_switch_stmt (tree);
1183 extern void genrtl_case_label (tree);
1184 extern void genrtl_compound_stmt (tree);
1185 extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1186 extern void genrtl_cleanup_stmt (tree);
1187 extern int stmts_are_full_exprs_p (void);
1188 extern int anon_aggr_type_p (tree);
1189
1190 /* For a VAR_DECL that is an anonymous union, these are the various
1191    sub-variables that make up the anonymous union.  */
1192 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1193
1194 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
1195 #define DECL_C_BIT_FIELD(NODE) \
1196   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1197 #define SET_DECL_C_BIT_FIELD(NODE) \
1198   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1199 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1200   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1201
1202 /* In a VAR_DECL, nonzero if the decl is a register variable with
1203    an explicit asm specification.  */
1204 #define DECL_C_HARD_REGISTER(DECL)  DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1205
1206 extern void emit_local_var (tree);
1207 extern void make_rtl_for_local_static (tree);
1208 extern tree expand_cond (tree);
1209 extern tree c_expand_return (tree);
1210 extern tree do_case (tree, tree);
1211 extern tree build_stmt (enum tree_code, ...);
1212 extern tree build_case_label (tree, tree, tree);
1213 extern tree build_continue_stmt (void);
1214 extern tree build_break_stmt (void);
1215 extern tree build_return_stmt (tree);
1216
1217 #define COMPOUND_STMT_NO_SCOPE(NODE)    TREE_LANG_FLAG_0 (NODE)
1218
1219 /* Used by the C++ frontend to mark the block around the member
1220    initializers and cleanups.  */
1221 #define COMPOUND_STMT_BODY_BLOCK(NODE)  TREE_LANG_FLAG_3 (NODE)
1222
1223 extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1224
1225 /* These functions must be defined by each front-end which implements
1226    a variant of the C language.  They are used in c-common.c.  */
1227
1228 extern tree build_unary_op (enum tree_code, tree, int);
1229 extern tree build_binary_op (enum tree_code, tree, tree, int);
1230 extern int lvalue_p (tree);
1231 extern tree default_conversion (tree);
1232
1233 /* Given two integer or real types, return the type for their sum.
1234    Given two compatible ANSI C types, returns the merged type.  */
1235
1236 extern tree common_type (tree, tree);
1237
1238 extern tree expand_tree_builtin (tree, tree, tree);
1239
1240 extern tree decl_constant_value (tree);
1241
1242 /* Handle increment and decrement of boolean types.  */
1243 extern tree boolean_increment (enum tree_code, tree);
1244
1245 /* Hook currently used only by the C++ front end to reset internal state
1246    after entering or leaving a header file.  */
1247 extern void extract_interface_info (void);
1248
1249 extern int case_compare (splay_tree_key, splay_tree_key);
1250
1251 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1252
1253 extern tree build_function_call (tree, tree);
1254
1255 extern tree finish_label_address_expr (tree);
1256
1257 /* Same function prototype, but the C and C++ front ends have
1258    different implementations.  Used in c-common.c.  */
1259 extern tree lookup_label (tree);
1260
1261 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1262
1263 extern int c_safe_from_p (rtx, tree);
1264
1265 extern int c_staticp (tree);
1266
1267 extern int c_common_unsafe_for_reeval (tree);
1268
1269 extern void init_c_lex (void);
1270
1271 extern void c_cpp_builtins (cpp_reader *);
1272
1273 /* Positive if an implicit `extern "C"' scope has just been entered;
1274    negative if such a scope has just been exited.  */
1275 extern int pending_lang_change;
1276
1277 /* Information recorded about each file examined during compilation.  */
1278
1279 struct c_fileinfo
1280 {
1281   int time;     /* Time spent in the file.  */
1282   short interface_only;         /* Flags - used only by C++ */
1283   short interface_unknown;
1284 };
1285
1286 struct c_fileinfo *get_fileinfo (const char *);
1287 extern void dump_time_statistics (void);
1288
1289 extern bool c_dump_tree (void *, tree);
1290
1291 extern void pch_init (void);
1292 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1293 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1294                                const char *orig);
1295 extern void c_common_write_pch (void);
1296 extern void c_common_no_more_pch (void);
1297 extern void builtin_define_with_value (const char *, const char *, int);
1298 extern void c_stddef_cpp_builtins (void);
1299 extern void fe_file_change (const struct line_map *);
1300 extern int c_estimate_num_insns (tree decl);
1301 extern bool c_decl_uninit (tree t);
1302 extern void c_parse_error (const char *, enum cpp_ttype, tree);
1303
1304 /* The following have been moved here from c-tree.h, since they're needed
1305    in the ObjC++ world, too.  What is more, stub-objc.c could use a few
1306    prototypes.  */
1307 extern tree lookup_interface (tree);
1308 extern tree is_class_name (tree);
1309 extern tree objc_is_object_ptr (tree);
1310 extern void objc_check_decl (tree);
1311 extern int objc_comptypes (tree, tree, int);
1312 extern tree objc_message_selector (void);
1313 extern tree lookup_objc_ivar (tree);
1314 extern void *get_current_scope (void);
1315 extern void objc_mark_locals_volatile (void *);
1316
1317 /* In c-ppoutput.c  */
1318 extern void init_pp_output (FILE *);
1319 extern void preprocess_file (cpp_reader *);
1320 extern void pp_file_change (const struct line_map *);
1321 extern void pp_dir_change (cpp_reader *, const char *);
1322
1323 #endif /* ! GCC_C_COMMON_H */