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 void push_file_scope (void);
 333 extern void pop_file_scope (void);
 334 extern int yyparse (void);
 335 extern stmt_tree current_stmt_tree (void);
 336 extern tree *current_scope_stmt_stack (void);
 337 extern void begin_stmt_tree (tree *);
 338 extern tree add_stmt (tree);
 339 extern void add_decl_stmt (tree);
 340 extern tree add_scope_stmt (int, int);
 341 extern void finish_stmt_tree (tree *);
 342
 343 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
 344 extern void prep_stmt (tree);
 345 extern void expand_stmt (tree);
 346 extern tree c_begin_if_stmt (void);
 347 extern tree c_begin_while_stmt (void);
 348 extern void c_finish_while_stmt_cond (tree, tree);
 349
 350 extern int field_decl_cmp (const void *, const void *);
 351 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
 352                                   void *);
 353 \f
 354 /* Switches common to the C front ends.  */
 355
 356 /* Nonzero if prepreprocessing only.  */
 357
 358 extern int flag_preprocess_only;
 359
 360 /* Zero means that faster, ...NonNil variants of objc_msgSend...
 361    calls will be used in ObjC; passing nil receivers to such calls
 362    will most likely result in crashes.  */
 363 extern int flag_nil_receivers;
 364
 365 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
 366    @try, etc.) in source code.  */
 367 extern int flag_objc_exceptions;
 368
 369 /* Nonzero means that code generation will be altered to support
 370    "zero-link" execution.  This currently affects ObjC only, but may
 371    affect other languages in the future.  */
 372 extern int flag_zero_link;
 373
 374 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
 375    unit.  It will inform the ObjC runtime that class definition(s) herein
 376    contained are to replace one(s) previously loaded.  */
 377 extern int flag_replace_objc_classes;
 378
 379 /* Nonzero means don't output line number information.  */
 380
 381 extern char flag_no_line_commands;
 382
 383 /* Nonzero causes -E output not to be done, but directives such as
 384    #define that have side effects are still obeyed.  */
 385
 386 extern char flag_no_output;
 387
 388 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
 389    'N' of the command line switch.  */
 390
 391 extern char flag_dump_macros;
 392
 393 /* Nonzero means pass #include lines through to the output.  */
 394
 395 extern char flag_dump_includes;
 396
 397 /* The file name to which we should write a precompiled header, or
 398    NULL if no header will be written in this compile.  */
 399
 400 extern const char *pch_file;
 401
 402 /* Nonzero if an ISO standard was selected.  It rejects macros in the
 403    user's namespace.  */
 404
 405 extern int flag_iso;
 406
 407 /* Nonzero if -undef was given.  It suppresses target built-in macros
 408    and assertions.  */
 409
 410 extern int flag_undef;
 411
 412 /* Nonzero means don't recognize the non-ANSI builtin functions.  */
 413
 414 extern int flag_no_builtin;
 415
 416 /* Nonzero means don't recognize the non-ANSI builtin functions.
 417    -ansi sets this.  */
 418
 419 extern int flag_no_nonansi_builtin;
 420
 421 /* Nonzero means give `double' the same size as `float'.  */
 422
 423 extern int flag_short_double;
 424
 425 /* Nonzero means give `wchar_t' the same size as `short'.  */
 426
 427 extern int flag_short_wchar;
 428
 429 /* Nonzero means allow Microsoft extensions without warnings or errors.  */
 430 extern int flag_ms_extensions;
 431
 432 /* Nonzero means don't recognize the keyword `asm'.  */
 433
 434 extern int flag_no_asm;
 435
 436 /* Nonzero means give string constants the type `const char *', as mandated
 437    by the standard.  */
 438
 439 extern int flag_const_strings;
 440
 441 /* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
 442
 443 extern int flag_signed_bitfields;
 444 extern int explicit_flag_signed_bitfields;
 445
 446 /* Nonzero means warn about pointer casts that can drop a type qualifier
 447    from the pointer target type.  */
 448
 449 extern int warn_cast_qual;
 450
 451 /* Warn about functions which might be candidates for format attributes.  */
 452
 453 extern int warn_missing_format_attribute;
 454
 455 /* Nonzero means warn about sizeof(function) or addition/subtraction
 456    of function pointers.  */
 457
 458 extern int warn_pointer_arith;
 459
 460 /* Nonzero means warn for any global function def
 461    without separate previous prototype decl.  */
 462
 463 extern int warn_missing_prototypes;
 464
 465 /* Warn if adding () is suggested.  */
 466
 467 extern int warn_parentheses;
 468
 469 /* Warn if initializer is not completely bracketed.  */
 470
 471 extern int warn_missing_braces;
 472
 473 /* Warn about comparison of signed and unsigned values.
 474    If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified.  */
 475
 476 extern int warn_sign_compare;
 477
 478 /* Nonzero means warn about usage of long long when `-pedantic'.  */
 479
 480 extern int warn_long_long;
 481
 482 /* Nonzero means warn about deprecated conversion from string constant to
 483    `char *'.  */
 484
 485 extern int warn_write_strings;
 486
 487 /* Nonzero means warn about multiple (redundant) decls for the same single
 488    variable or function.  */
 489
 490 extern int warn_redundant_decls;
 491
 492 /* Warn about testing equality of floating point numbers.  */
 493
 494 extern int warn_float_equal;
 495
 496 /* Warn about a subscript that has type char.  */
 497
 498 extern int warn_char_subscripts;
 499
 500 /* Warn if a type conversion is done that might have confusing results.  */
 501
 502 extern int warn_conversion;
 503
 504 /* Warn about #pragma directives that are not recognized.  */
 505
 506 extern int warn_unknown_pragmas; /* Tri state variable.  */
 507
 508 /* Warn about format/argument anomalies in calls to formatted I/O functions
 509    (*printf, *scanf, strftime, strfmon, etc.).  */
 510
 511 extern int warn_format;
 512
 513 /* Warn about Y2K problems with strftime formats.  */
 514
 515 extern int warn_format_y2k;
 516
 517 /* Warn about excess arguments to formats.  */
 518
 519 extern int warn_format_extra_args;
 520
 521 /* Warn about zero-length formats.  */
 522
 523 extern int warn_format_zero_length;
 524
 525 /* Warn about non-literal format arguments.  */
 526
 527 extern int warn_format_nonliteral;
 528
 529 /* Warn about possible security problems with calls to format functions.  */
 530
 531 extern int warn_format_security;
 532
 533
 534 /* C/ObjC language option variables.  */
 535
 536
 537 /* Nonzero means message about use of implicit function declarations;
 538  1 means warning; 2 means error.  */
 539
 540 extern int mesg_implicit_function_declaration;
 541
 542 /* Nonzero means allow type mismatches in conditional expressions;
 543    just make their values `void'.  */
 544
 545 extern int flag_cond_mismatch;
 546
 547 /* Nonzero means enable C89 Amendment 1 features.  */
 548
 549 extern int flag_isoc94;
 550
 551 /* Nonzero means use the ISO C99 dialect of C.  */
 552
 553 extern int flag_isoc99;
 554
 555 /* Nonzero means that we have builtin functions, and main is an int.  */
 556
 557 extern int flag_hosted;
 558
 559 /* Nonzero means warn when casting a function call to a type that does
 560    not match the return type (e.g. (float)sqrt() or (anything*)malloc()
 561    when there is no previous declaration of sqrt or malloc.  */
 562
 563 extern int warn_bad_function_cast;
 564
 565 /* Warn about traditional constructs whose meanings changed in ANSI C.  */
 566
 567 extern int warn_traditional;
 568
 569 /* Nonzero means warn for a declaration found after a statement.  */
 570
 571 extern int warn_declaration_after_statement;
 572
 573 /* Nonzero means warn for non-prototype function decls
 574    or non-prototyped defs without previous prototype.  */
 575
 576 extern int warn_strict_prototypes;
 577
 578 /* Nonzero means warn for any global function def
 579    without separate previous decl.  */
 580
 581 extern int warn_missing_declarations;
 582
 583 /* Nonzero means warn about extern declarations of objects not at
 584    file-scope level and about *all* declarations of functions (whether
 585    extern or static) not at file-scope level.  Note that we exclude
 586    implicit function declarations.  To get warnings about those, use
 587    -Wimplicit.  */
 588
 589 extern int warn_nested_externs;
 590
 591 /* Warn if main is suspicious.  */
 592
 593 extern int warn_main;
 594
 595 /* Nonzero means warn about possible violations of sequence point rules.  */
 596
 597 extern int warn_sequence_point;
 598
 599 /* Nonzero means warn about uninitialized variable when it is initialized with itself.
 600    For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero.  */
 601
 602 extern int warn_init_self;
 603
 604
 605 /* Nonzero means to warn about compile-time division by zero.  */
 606 extern int warn_div_by_zero;
 607
 608 /* Nonzero means warn about use of implicit int.  */
 609
 610 extern int warn_implicit_int;
 611
 612 /* Warn about NULL being passed to argument slots marked as requiring
 613    non-NULL.  */
 614
 615 extern int warn_nonnull;
 616
 617 /* Warn about old-style parameter declaration.  */
 618
 619 extern int warn_old_style_definition;
 620
 621
 622 /* ObjC language option variables.  */
 623
 624
 625 /* Open and close the file for outputting class declarations, if
 626    requested (ObjC).  */
 627
 628 extern int flag_gen_declaration;
 629
 630 /* Generate code for GNU or NeXT runtime environment.  */
 631
 632 extern int flag_next_runtime;
 633
 634 /* Tells the compiler that this is a special run.  Do not perform any
 635    compiling, instead we are to test some platform dependent features
 636    and output a C header file with appropriate definitions.  */
 637
 638 extern int print_struct_values;
 639
 640 /* ???.  Undocumented.  */
 641
 642 extern const char *constant_string_class_name;
 643
 644 /* Warn if multiple methods are seen for the same selector, but with
 645    different argument types.  Performs the check on the whole selector
 646    table at the end of compilation.  */
 647
 648 extern int warn_selector;
 649
 650 /* Warn if a @selector() is found, and no method with that selector
 651    has been previously declared.  The check is done on each
 652    @selector() as soon as it is found - so it warns about forward
 653    declarations.  */
 654
 655 extern int warn_undeclared_selector;
 656
 657 /* Warn if methods required by a protocol are not implemented in the
 658    class adopting it.  When turned off, methods inherited to that
 659    class are also considered implemented.  */
 660
 661 extern int warn_protocol;
 662
 663
 664 /* C++ language option variables.  */
 665
 666
 667 /* Nonzero means don't recognize any extension keywords.  */
 668
 669 extern int flag_no_gnu_keywords;
 670
 671 /* Nonzero means do emit exported implementations of functions even if
 672    they can be inlined.  */
 673
 674 extern int flag_implement_inlines;
 675
 676 /* Nonzero means that implicit instantiations will be emitted if needed.  */
 677
 678 extern int flag_implicit_templates;
 679
 680 /* Nonzero means that implicit instantiations of inline templates will be
 681    emitted if needed, even if instantiations of non-inline templates
 682    aren't.  */
 683
 684 extern int flag_implicit_inline_templates;
 685
 686 /* Nonzero means generate separate instantiation control files and
 687    juggle them at link time.  */
 688
 689 extern int flag_use_repository;
 690
 691 /* Nonzero if we want to issue diagnostics that the standard says are not
 692    required.  */
 693
 694 extern int flag_optional_diags;
 695
 696 /* Nonzero means we should attempt to elide constructors when possible.  */
 697
 698 extern int flag_elide_constructors;
 699
 700 /* Nonzero means that member functions defined in class scope are
 701    inline by default.  */
 702
 703 extern int flag_default_inline;
 704
 705 /* Controls whether compiler generates 'type descriptor' that give
 706    run-time type information.  */
 707
 708 extern int flag_rtti;
 709
 710 /* Nonzero if we want to conserve space in the .o files.  We do this
 711    by putting uninitialized data and runtime initialized data into
 712    .common instead of .data at the expense of not flagging multiple
 713    definitions.  */
 714
 715 extern int flag_conserve_space;
 716
 717 /* Nonzero if we want to obey access control semantics.  */
 718
 719 extern int flag_access_control;
 720
 721 /* Nonzero if we want to check the return value of new and avoid calling
 722    constructors if it is a null pointer.  */
 723
 724 extern int flag_check_new;
 725
 726 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
 727    initialization variables.
 728    0: Old rules, set by -fno-for-scope.
 729    2: New ISO rules, set by -ffor-scope.
 730    1: Try to implement new ISO rules, but with backup compatibility
 731    (and warnings).  This is the default, for now.  */
 732
 733 extern int flag_new_for_scope;
 734
 735 /* Nonzero if we want to emit defined symbols with common-like linkage as
 736    weak symbols where possible, in order to conform to C++ semantics.
 737    Otherwise, emit them as local symbols.  */
 738
 739 extern int flag_weak;
 740
 741 /* 0 means we want the preprocessor to not emit line directives for
 742    the current working directory.  1 means we want it to do it.  -1
 743    means we should decide depending on whether debugging information
 744    is being emitted or not.  */
 745
 746 extern int flag_working_directory;
 747
 748 /* Nonzero to use __cxa_atexit, rather than atexit, to register
 749    destructors for local statics and global objects.  */
 750
 751 extern int flag_use_cxa_atexit;
 752
 753 /* Nonzero means make the default pedwarns warnings instead of errors.
 754    The value of this flag is ignored if -pedantic is specified.  */
 755
 756 extern int flag_permissive;
 757
 758 /* Nonzero means to implement standard semantics for exception
 759    specifications, calling unexpected if an exception is thrown that
 760    doesn't match the specification.  Zero means to treat them as
 761    assertions and optimize accordingly, but not check them.  */
 762
 763 extern int flag_enforce_eh_specs;
 764
 765 /* Nonzero means warn about things that will change when compiling
 766    with an ABI-compliant compiler.  */
 767
 768 extern int warn_abi;
 769
 770 /* Nonzero means warn about invalid uses of offsetof.  */
 771
 772 extern int warn_invalid_offsetof;
 773
 774 /* Nonzero means warn about implicit declarations.  */
 775
 776 extern int warn_implicit;
 777
 778 /* Nonzero means warn when all ctors or dtors are private, and the class
 779    has no friends.  */
 780
 781 extern int warn_ctor_dtor_privacy;
 782
 783 /* Nonzero means warn in function declared in derived class has the
 784    same name as a virtual in the base class, but fails to match the
 785    type signature of any virtual function in the base class.  */
 786
 787 extern int warn_overloaded_virtual;
 788
 789 /* Nonzero means warn when declaring a class that has a non virtual
 790    destructor, when it really ought to have a virtual one.  */
 791
 792 extern int warn_nonvdtor;
 793
 794 /* Nonzero means warn when the compiler will reorder code.  */
 795
 796 extern int warn_reorder;
 797
 798 /* Nonzero means warn when synthesis behavior differs from Cfront's.  */
 799
 800 extern int warn_synth;
 801
 802 /* Nonzero means warn when we convert a pointer to member function
 803    into a pointer to (void or function).  */
 804
 805 extern int warn_pmf2ptr;
 806
 807 /* Nonzero means warn about violation of some Effective C++ style rules.  */
 808
 809 extern int warn_ecpp;
 810
 811 /* Nonzero means warn where overload resolution chooses a promotion from
 812    unsigned to signed over a conversion to an unsigned of the same size.  */
 813
 814 extern int warn_sign_promo;
 815
 816 /* Nonzero means warn when an old-style cast is used.  */
 817
 818 extern int warn_old_style_cast;
 819
 820 /* Nonzero means warn when non-templatized friend functions are
 821    declared within a template */
 822
 823 extern int warn_nontemplate_friend;
 824
 825 /* Nonzero means complain about deprecated features.  */
 826
 827 extern int warn_deprecated;
 828
 829 /* Maximum template instantiation depth.  This limit is rather
 830    arbitrary, but it exists to limit the time it takes to notice
 831    infinite template instantiations.  */
 832
 833 extern int max_tinst_depth;
 834
 835 /* Nonzero means the expression being parsed will never be evaluated.
 836    This is a count, since unevaluated expressions can nest.  */
 837
 838 extern int skip_evaluation;
 839
 840 /* C types are partitioned into three subsets: object, function, and
 841    incomplete types.  */
 842 #define C_TYPE_OBJECT_P(type) \
 843   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
 844
 845 #define C_TYPE_INCOMPLETE_P(type) \
 846   (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
 847
 848 #define C_TYPE_FUNCTION_P(type) \
 849   (TREE_CODE (type) == FUNCTION_TYPE)
 850
 851 /* For convenience we define a single macro to identify the class of
 852    object or incomplete types.  */
 853 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
 854   (!C_TYPE_FUNCTION_P (type))
 855
 856 /* Record in each node resulting from a binary operator
 857    what operator was specified for it.  */
 858 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
 859
 860 /* Attribute table common to the C front ends.  */
 861 extern const struct attribute_spec c_common_attribute_table[];
 862 extern const struct attribute_spec c_common_format_attribute_table[];
 863
 864 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
 865    ID is the identifier to use, NAME is the string.
 866    TYPE_DEP indicates whether it depends on type of the function or not
 867    (i.e. __PRETTY_FUNCTION__).  */
 868
 869 extern tree (*make_fname_decl) (tree, int);
 870
 871 extern tree identifier_global_value (tree);
 872 extern void record_builtin_type (enum rid, const char *, tree);
 873 extern tree build_void_list_node (void);
 874 extern void start_fname_decls (void);
 875 extern void finish_fname_decls (void);
 876 extern const char *fname_as_string (int);
 877 extern tree fname_decl (unsigned, tree);
 878
 879 extern void check_function_arguments (tree, tree);
 880 extern void check_function_arguments_recurse (void (*)
 881                                               (void *, tree,
 882                                                unsigned HOST_WIDE_INT),
 883                                               void *, tree,
 884                                               unsigned HOST_WIDE_INT);
 885 extern void check_function_format (int *, tree, tree);
 886 extern void set_Wformat (int);
 887 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
 888 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 889 extern int c_common_handle_option (size_t code, const char *arg, int value);
 890 extern bool c_common_missing_argument (const char *opt, size_t code);
 891 extern tree c_common_type_for_mode (enum machine_mode, int);
 892 extern tree c_common_type_for_size (unsigned int, int);
 893 extern tree c_common_unsigned_type (tree);
 894 extern tree c_common_signed_type (tree);
 895 extern tree c_common_signed_or_unsigned_type (int, tree);
 896 extern tree c_common_truthvalue_conversion (tree);
 897 extern void c_apply_type_quals_to_decl (int, tree);
 898 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
 899 extern tree c_alignof_expr (tree);
 900 /* Print an error message for invalid operands to arith operation CODE.
 901    NOP_EXPR is used as a special case (see truthvalue_conversion).  */
 902 extern void binary_op_error (enum tree_code);
 903 #define my_friendly_assert(EXP, N) (void) \
 904  (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
 905
 906 extern tree c_expand_expr_stmt (tree);
 907 extern void c_expand_start_cond (tree, int, tree);
 908 extern void c_finish_then (void);
 909 extern void c_expand_start_else (void);
 910 extern void c_finish_else (void);
 911 extern void c_expand_end_cond (void);
 912 /* Validate the expression after `case' and apply default promotions.  */
 913 extern tree check_case_value (tree);
 914 extern tree fix_string_type (tree);
 915 struct varray_head_tag;
 916 extern void constant_expression_warning (tree);
 917 extern tree convert_and_check (tree, tree);
 918 extern void overflow_warning (tree);
 919 extern void unsigned_conversion_warning (tree, tree);
 920
 921 #define c_sizeof(T)  c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
 922 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
 923
 924 /* Subroutine of build_binary_op, used for comparison operations.
 925    See if the operands have both been converted from subword integer types
 926    and, if so, perhaps change them both back to their original type.  */
 927 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
 928
 929 extern tree pointer_int_sum (enum tree_code, tree, tree);
 930 extern unsigned int min_precision (tree, int);
 931
 932 /* Add qualifiers to a type, in the fashion for C.  */
 933 extern tree c_build_qualified_type (tree, int);
 934
 935 /* Build tree nodes and builtin functions common to both C and C++ language
 936    frontends.  */
 937 extern void c_common_nodes_and_builtins (void);
 938
 939 extern void disable_builtin_function (const char *);
 940
 941 extern tree build_va_arg (tree, tree);
 942
 943 extern unsigned int c_common_init_options (unsigned int, const char **);
 944 extern bool c_common_post_options (const char **);
 945 extern bool c_common_init (void);
 946 extern void c_common_finish (void);
 947 extern void c_common_parse_file (int);
 948 extern HOST_WIDE_INT c_common_get_alias_set (tree);
 949 extern void c_register_builtin_type (tree, const char*);
 950 extern bool c_promoting_integer_type_p (tree);
 951 extern int self_promoting_args_p (tree);
 952 extern tree strip_array_types (tree);
 953 extern tree strip_pointer_operator (tree);
 954
 955 /* This is the basic parsing function.  */
 956 extern void c_parse_file (void);
 957 /* This is misnamed, it actually performs end-of-compilation processing.  */
 958 extern void finish_file (void);
 959
 960 /* These macros provide convenient access to the various _STMT nodes.  */
 961
 962 /* Nonzero if this statement should be considered a full-expression,
 963    i.e., if temporaries created during this statement should have
 964    their destructors run at the end of this statement.  (In C, this
 965    will always be false, since there are no destructors.)  */
 966 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
 967
 968 /* IF_STMT accessors. These give access to the condition of the if
 969    statement, the then block of the if statement, and the else block
 970    of the if statement if it exists.  */
 971 #define IF_COND(NODE)           TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
 972 #define THEN_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
 973 #define ELSE_CLAUSE(NODE)       TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
 974
 975 /* WHILE_STMT accessors. These give access to the condition of the
 976    while statement and the body of the while statement, respectively.  */
 977 #define WHILE_COND(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
 978 #define WHILE_BODY(NODE)        TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
 979
 980 /* DO_STMT accessors. These give access to the condition of the do
 981    statement and the body of the do statement, respectively.  */
 982 #define DO_COND(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
 983 #define DO_BODY(NODE)           TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
 984
 985 /* RETURN_STMT accessors. These give the expression associated with a
 986    return statement, and whether it should be ignored when expanding
 987    (as opposed to inlining).  */
 988 #define RETURN_STMT_EXPR(NODE)  TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
 989
 990 /* EXPR_STMT accessor. This gives the expression associated with an
 991    expression statement.  */
 992 #define EXPR_STMT_EXPR(NODE)    TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
 993
 994 /* FOR_STMT accessors. These give access to the init statement,
 995    condition, update expression, and body of the for statement,
 996    respectively.  */
 997 #define FOR_INIT_STMT(NODE)     TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
 998 #define FOR_COND(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
 999 #define FOR_EXPR(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1000 #define FOR_BODY(NODE)          TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1001
1002 /* SWITCH_STMT accessors. These give access to the condition, body and
1003    original condition type (before any compiler conversions)
1004    of the switch statement, respectively.  */
1005 #define SWITCH_COND(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1006 #define SWITCH_BODY(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1007 #define SWITCH_TYPE(NODE)       TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1008
1009 /* CASE_LABEL accessors. These give access to the high and low values
1010    of a case label, respectively.  */
1011 #define CASE_LOW(NODE)          TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1012 #define CASE_HIGH(NODE)         TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1013 #define CASE_LABEL_DECL(NODE)   TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1014
1015 /* GOTO_STMT accessor. This gives access to the label associated with
1016    a goto statement.  */
1017 #define GOTO_DESTINATION(NODE)  TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1018 /* True for goto created artificially by the compiler.  */
1019 #define GOTO_FAKE_P(NODE)       (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1020
1021 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1022    statements associated with a compound statement. The result is the
1023    first statement in the list. Succeeding nodes can be accessed by
1024    calling TREE_CHAIN on a node in the list.  */
1025 #define COMPOUND_BODY(NODE)     TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1026
1027 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1028    instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1029    ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1030    statement.  */
1031 #define ASM_CV_QUAL(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1032 #define ASM_STRING(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1033 #define ASM_OUTPUTS(NODE)       TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1034 #define ASM_INPUTS(NODE)        TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1035 #define ASM_CLOBBERS(NODE)      TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1036
1037 /* DECL_STMT accessor. This gives access to the DECL associated with
1038    the given declaration statement.  */
1039 #define DECL_STMT_DECL(NODE)    TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1040
1041 /* STMT_EXPR accessor.  */
1042 #define STMT_EXPR_STMT(NODE)    TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1043
1044 /* Nonzero if this statement-expression does not have an associated scope.  */
1045 #define STMT_EXPR_NO_SCOPE(NODE) \
1046    TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1047
1048 /* Nonzero if this statement-expression should cause warning if its result
1049    is not used.  */
1050 #define STMT_EXPR_WARN_UNUSED_RESULT(NODE) \
1051    TREE_LANG_FLAG_3 (STMT_EXPR_CHECK (NODE))
1052
1053 /* LABEL_STMT accessor. This gives access to the label associated with
1054    the given label statement.  */
1055 #define LABEL_STMT_LABEL(NODE)  TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1056
1057 /* COMPOUND_LITERAL_EXPR accessors.  */
1058 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE)           \
1059   TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1060 #define COMPOUND_LITERAL_EXPR_DECL(NODE)                        \
1061   DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1062
1063 /* Nonzero if this SCOPE_STMT is for the beginning of a scope.  */
1064 #define SCOPE_BEGIN_P(NODE) \
1065   (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1066
1067 /* Nonzero if this SCOPE_STMT is for the end of a scope.  */
1068 #define SCOPE_END_P(NODE) \
1069   (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1070
1071 /* The BLOCK containing the declarations contained in this scope.  */
1072 #define SCOPE_STMT_BLOCK(NODE) \
1073   (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1074
1075 /* Nonzero for a SCOPE_STMT if there were no variables in this scope.  */
1076 #define SCOPE_NULLIFIED_P(NODE) \
1077   (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1078
1079 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1080    which should be treated as non-existent from the point of view of
1081    running cleanup actions.  */
1082 #define SCOPE_NO_CLEANUPS_P(NODE) \
1083   (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1084
1085 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1086    For example, in:
1087
1088      S s;
1089      l:
1090      S s2;
1091      goto l;
1092
1093    there is (implicitly) a new scope after `l', even though there are
1094    no curly braces.  In particular, when we hit the goto, we must
1095    destroy s2 and then re-construct it.  For the implicit scope,
1096    SCOPE_PARTIAL_P will be set.  */
1097 #define SCOPE_PARTIAL_P(NODE) \
1098   (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1099
1100 /* Nonzero for an ASM_STMT if the assembly statement is volatile.  */
1101 #define ASM_VOLATILE_P(NODE)                    \
1102   (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1103
1104 /* The VAR_DECL to clean up in a CLEANUP_STMT.  */
1105 #define CLEANUP_DECL(NODE) \
1106   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1107 /* The cleanup to run in a CLEANUP_STMT.  */
1108 #define CLEANUP_EXPR(NODE) \
1109   TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1110
1111 /* The filename we are changing to as of this FILE_STMT.  */
1112 #define FILE_STMT_FILENAME_NODE(NODE) \
1113   (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1114 #define FILE_STMT_FILENAME(NODE) \
1115   (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1116
1117 /* The line-number at which a statement began.  But if
1118    STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1119    line number for the end of the current function instead.  */
1120 #define STMT_LINENO(NODE)                       \
1121   (TREE_COMPLEXITY ((NODE)))
1122
1123 /* If nonzero, the STMT_LINENO for NODE is the line at which the
1124    function ended.  */
1125 #define STMT_LINENO_FOR_FN_P(NODE)              \
1126   (TREE_LANG_FLAG_2 ((NODE)))
1127
1128 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1129    initialization variables.  */
1130 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1131
1132 /* Nonzero if we want to create an ASM_INPUT instead of an
1133    ASM_OPERAND with no operands.  */
1134 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1135
1136 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1137
1138 enum c_tree_code {
1139   C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1140 #include "c-common.def"
1141   LAST_C_TREE_CODE
1142 };
1143
1144 #undef DEFTREECODE
1145
1146 #define c_common_stmt_codes                             \
1147    CLEANUP_STMT,        EXPR_STMT,      COMPOUND_STMT,  \
1148    DECL_STMT,           IF_STMT,        FOR_STMT,       \
1149    WHILE_STMT,          DO_STMT,        RETURN_STMT,    \
1150    BREAK_STMT,          CONTINUE_STMT,  SCOPE_STMT,     \
1151    SWITCH_STMT,         GOTO_STMT,      LABEL_STMT,     \
1152    ASM_STMT,            FILE_STMT,      CASE_LABEL
1153
1154 /* TRUE if a code represents a statement.  The front end init
1155    langhook should take care of initialization of this array.  */
1156 extern bool statement_code_p[MAX_TREE_CODES];
1157
1158 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1159
1160 #define INIT_STATEMENT_CODES(STMT_CODES)                        \
1161   do {                                                          \
1162     unsigned int i;                                             \
1163     memset (&statement_code_p, 0, sizeof (statement_code_p));   \
1164     for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++)               \
1165       statement_code_p[STMT_CODES[i]] = true;                   \
1166   } while (0)
1167
1168 extern void genrtl_do_pushlevel (void);
1169 extern void genrtl_goto_stmt (tree);
1170 extern void genrtl_expr_stmt (tree);
1171 extern void genrtl_expr_stmt_value (tree, int, int);
1172 extern void genrtl_decl_stmt (tree);
1173 extern void genrtl_if_stmt (tree);
1174 extern void genrtl_while_stmt (tree);
1175 extern void genrtl_do_stmt (tree);
1176 extern void genrtl_return_stmt (tree);
1177 extern void genrtl_for_stmt (tree);
1178 extern void genrtl_break_stmt (void);
1179 extern void genrtl_continue_stmt (void);
1180 extern void genrtl_scope_stmt (tree);
1181 extern void genrtl_switch_stmt (tree);
1182 extern void genrtl_case_label (tree);
1183 extern void genrtl_compound_stmt (tree);
1184 extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1185 extern void genrtl_cleanup_stmt (tree);
1186 extern int stmts_are_full_exprs_p (void);
1187 extern int anon_aggr_type_p (tree);
1188
1189 /* For a VAR_DECL that is an anonymous union, these are the various
1190    sub-variables that make up the anonymous union.  */
1191 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1192
1193 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
1194 #define DECL_C_BIT_FIELD(NODE) \
1195   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1196 #define SET_DECL_C_BIT_FIELD(NODE) \
1197   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1198 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1199   (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1200
1201 /* In a VAR_DECL, nonzero if the decl is a register variable with
1202    an explicit asm specification.  */
1203 #define DECL_C_HARD_REGISTER(DECL)  DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1204
1205 extern void emit_local_var (tree);
1206 extern void make_rtl_for_local_static (tree);
1207 extern tree expand_cond (tree);
1208 extern tree c_expand_return (tree);
1209 extern tree do_case (tree, tree);
1210 extern tree build_stmt (enum tree_code, ...);
1211 extern tree build_case_label (tree, tree, tree);
1212 extern tree build_continue_stmt (void);
1213 extern tree build_break_stmt (void);
1214 extern tree build_return_stmt (tree);
1215
1216 #define COMPOUND_STMT_NO_SCOPE(NODE)    TREE_LANG_FLAG_0 (NODE)
1217
1218 /* Used by the C++ frontend to mark the block around the member
1219    initializers and cleanups.  */
1220 #define COMPOUND_STMT_BODY_BLOCK(NODE)  TREE_LANG_FLAG_3 (NODE)
1221
1222 extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1223
1224 /* These functions must be defined by each front-end which implements
1225    a variant of the C language.  They are used in c-common.c.  */
1226
1227 extern tree build_unary_op (enum tree_code, tree, int);
1228 extern tree build_binary_op (enum tree_code, tree, tree, int);
1229 extern int lvalue_p (tree);
1230 extern tree default_conversion (tree);
1231
1232 /* Given two integer or real types, return the type for their sum.
1233    Given two compatible ANSI C types, returns the merged type.  */
1234
1235 extern tree common_type (tree, tree);
1236
1237 extern tree expand_tree_builtin (tree, tree, tree);
1238
1239 extern tree decl_constant_value (tree);
1240
1241 /* Handle increment and decrement of boolean types.  */
1242 extern tree boolean_increment (enum tree_code, tree);
1243
1244 /* Hook currently used only by the C++ front end to reset internal state
1245    after entering or leaving a header file.  */
1246 extern void extract_interface_info (void);
1247
1248 extern int case_compare (splay_tree_key, splay_tree_key);
1249
1250 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1251
1252 extern tree build_function_call (tree, tree);
1253
1254 extern tree finish_label_address_expr (tree);
1255
1256 /* Same function prototype, but the C and C++ front ends have
1257    different implementations.  Used in c-common.c.  */
1258 extern tree lookup_label (tree);
1259
1260 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1261
1262 extern int c_safe_from_p (rtx, tree);
1263
1264 extern int c_staticp (tree);
1265
1266 extern int c_common_unsafe_for_reeval (tree);
1267
1268 extern void init_c_lex (void);
1269
1270 extern void c_cpp_builtins (cpp_reader *);
1271
1272 /* Positive if an implicit `extern "C"' scope has just been entered;
1273    negative if such a scope has just been exited.  */
1274 extern GTY(()) int pending_lang_change;
1275
1276 /* Information recorded about each file examined during compilation.  */
1277
1278 struct c_fileinfo
1279 {
1280   int time;     /* Time spent in the file.  */
1281   short interface_only;         /* Flags - used only by C++ */
1282   short interface_unknown;
1283 };
1284
1285 struct c_fileinfo *get_fileinfo (const char *);
1286 extern void dump_time_statistics (void);
1287
1288 extern bool c_dump_tree (void *, tree);
1289
1290 extern void pch_init (void);
1291 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1292 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1293                                const char *orig);
1294 extern void c_common_write_pch (void);
1295 extern void c_common_no_more_pch (void);
1296 extern void builtin_define_with_value (const char *, const char *, int);
1297 extern void c_stddef_cpp_builtins (void);
1298 extern void fe_file_change (const struct line_map *);
1299 extern int c_estimate_num_insns (tree decl);
1300 extern bool c_decl_uninit (tree t);
1301 extern void c_parse_error (const char *, enum cpp_ttype, tree);
1302
1303 /* The following have been moved here from c-tree.h, since they're needed
1304    in the ObjC++ world, too.  What is more, stub-objc.c could use a few
1305    prototypes.  */
1306 extern tree lookup_interface (tree);
1307 extern tree is_class_name (tree);
1308 extern tree objc_is_object_ptr (tree);
1309 extern void objc_check_decl (tree);
1310 extern int objc_comptypes (tree, tree, int);
1311 extern tree objc_message_selector (void);
1312 extern tree lookup_objc_ivar (tree);
1313 extern void *get_current_scope (void);
1314 extern void objc_mark_locals_volatile (void *);
1315
1316 /* In c-ppoutput.c  */
1317 extern void init_pp_output (FILE *);
1318 extern void preprocess_file (cpp_reader *);
1319 extern void pp_file_change (const struct line_map *);
1320 extern void pp_dir_change (cpp_reader *, const char *);
1321
1322 #endif /* ! GCC_C_COMMON_H */