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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [c-common.h] - Blame information for rev 193

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/* Definitions for c-common.c.
2
   Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3
   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 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 3, 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 COPYING3.  If not see
19
<http://www.gnu.org/licenses/>.  */
20
 
21
#ifndef GCC_C_COMMON_H
22
#define GCC_C_COMMON_H
23
 
24
#include "splay-tree.h"
25
#include "cpplib.h"
26
#include "ggc.h"
27
 
28
/* Usage of TREE_LANG_FLAG_?:
29
   0: TREE_NEGATED_INT (in INTEGER_CST).
30
      IDENTIFIER_MARKED (used by search routines).
31
      DECL_PRETTY_FUNCTION_P (in VAR_DECL)
32
   1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
33
      STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
34
   2: unused
35
   3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
36
   4: unused
37
*/
38
 
39
/* Reserved identifiers.  This is the union of all the keywords for C,
40
   C++, and Objective-C.  All the type modifiers have to be in one
41
   block at the beginning, because they are used as mask bits.  There
42
   are 27 type modifiers; if we add many more we will have to redesign
43
   the mask mechanism.  */
44
 
45
enum rid
46
{
47
  /* Modifiers: */
48
  /* C, in empirical order of frequency.  */
49
  RID_STATIC = 0,
50
  RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
51
  RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
52
  RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
53
 
54
  /* C extensions */
55
  RID_COMPLEX, RID_THREAD,
56
 
57
  /* C++ */
58
  RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
59
 
60
  /* ObjC */
61
  RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
62
 
63
  /* C */
64
  RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
65
  RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
66
  RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
67
  RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
68
  RID_SIZEOF,
69
 
70
  /* C extensions */
71
  RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
72
  RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
73
  RID_TYPES_COMPATIBLE_P,
74
  RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
75
 
76
  /* Too many ways of getting the name of a function as a string */
77
  RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
78
 
79
  /* C++ */
80
  RID_BOOL,     RID_WCHAR,    RID_CLASS,
81
  RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
82
  RID_TEMPLATE, RID_NULL,     RID_CATCH,
83
  RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
84
  RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
85
  RID_THIS,     RID_THROW,    RID_TRUE,
86
  RID_TRY,      RID_TYPENAME, RID_TYPEID,
87
  RID_USING,
88
 
89
  /* casts */
90
  RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
91
 
92
  /* Objective-C */
93
  RID_AT_ENCODE,   RID_AT_END,
94
  RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
95
  RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
96
  RID_AT_PROTOCOL, RID_AT_SELECTOR,
97
  RID_AT_THROW,    RID_AT_TRY,       RID_AT_CATCH,
98
  RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
99
  RID_AT_INTERFACE,
100
  RID_AT_IMPLEMENTATION,
101
 
102
  RID_MAX,
103
 
104
  RID_FIRST_MODIFIER = RID_STATIC,
105
  RID_LAST_MODIFIER = RID_ONEWAY,
106
 
107
  RID_FIRST_AT = RID_AT_ENCODE,
108
  RID_LAST_AT = RID_AT_IMPLEMENTATION,
109
  RID_FIRST_PQ = RID_IN,
110
  RID_LAST_PQ = RID_ONEWAY
111
};
112
 
113
#define OBJC_IS_AT_KEYWORD(rid) \
114
  ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
115
   (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
116
 
117
#define OBJC_IS_PQ_KEYWORD(rid) \
118
  ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
119
   (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
120
 
121
/* The elements of `ridpointers' are identifier nodes for the reserved
122
   type names and storage classes.  It is indexed by a RID_... value.  */
123
extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
124
 
125
/* Standard named or nameless data types of the C compiler.  */
126
 
127
enum c_tree_index
128
{
129
    CTI_WCHAR_TYPE,
130
    CTI_SIGNED_WCHAR_TYPE,
131
    CTI_UNSIGNED_WCHAR_TYPE,
132
    CTI_WINT_TYPE,
133
    CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
134
    CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
135
    CTI_INTMAX_TYPE,
136
    CTI_UINTMAX_TYPE,
137
    CTI_WIDEST_INT_LIT_TYPE,
138
    CTI_WIDEST_UINT_LIT_TYPE,
139
 
140
    CTI_CHAR_ARRAY_TYPE,
141
    CTI_WCHAR_ARRAY_TYPE,
142
    CTI_INT_ARRAY_TYPE,
143
    CTI_STRING_TYPE,
144
    CTI_CONST_STRING_TYPE,
145
 
146
    /* Type for boolean expressions (bool in C++, int in C).  */
147
    CTI_TRUTHVALUE_TYPE,
148
    CTI_TRUTHVALUE_TRUE,
149
    CTI_TRUTHVALUE_FALSE,
150
 
151
    CTI_DEFAULT_FUNCTION_TYPE,
152
 
153
    /* These are not types, but we have to look them up all the time.  */
154
    CTI_FUNCTION_NAME_DECL,
155
    CTI_PRETTY_FUNCTION_NAME_DECL,
156
    CTI_C99_FUNCTION_NAME_DECL,
157
    CTI_SAVED_FUNCTION_NAME_DECLS,
158
 
159
    CTI_VOID_ZERO,
160
 
161
    CTI_NULL,
162
 
163
    CTI_MAX
164
};
165
 
166
#define C_RID_CODE(id)  (((struct c_common_identifier *) (id))->node.rid_code)
167
 
168
/* Identifier part common to the C front ends.  Inherits from
169
   tree_identifier, despite appearances.  */
170
struct c_common_identifier GTY(())
171
{
172
  struct tree_common common;
173
  struct cpp_hashnode node;
174
};
175
 
176
#define wchar_type_node                 c_global_trees[CTI_WCHAR_TYPE]
177
#define signed_wchar_type_node          c_global_trees[CTI_SIGNED_WCHAR_TYPE]
178
#define unsigned_wchar_type_node        c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
179
#define wint_type_node                  c_global_trees[CTI_WINT_TYPE]
180
#define signed_size_type_node           c_global_trees[CTI_SIGNED_SIZE_TYPE]
181
#define unsigned_ptrdiff_type_node      c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
182
#define intmax_type_node                c_global_trees[CTI_INTMAX_TYPE]
183
#define uintmax_type_node               c_global_trees[CTI_UINTMAX_TYPE]
184
#define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
185
#define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
186
 
187
#define truthvalue_type_node            c_global_trees[CTI_TRUTHVALUE_TYPE]
188
#define truthvalue_true_node            c_global_trees[CTI_TRUTHVALUE_TRUE]
189
#define truthvalue_false_node           c_global_trees[CTI_TRUTHVALUE_FALSE]
190
 
191
#define char_array_type_node            c_global_trees[CTI_CHAR_ARRAY_TYPE]
192
#define wchar_array_type_node           c_global_trees[CTI_WCHAR_ARRAY_TYPE]
193
#define int_array_type_node             c_global_trees[CTI_INT_ARRAY_TYPE]
194
#define string_type_node                c_global_trees[CTI_STRING_TYPE]
195
#define const_string_type_node          c_global_trees[CTI_CONST_STRING_TYPE]
196
 
197
#define default_function_type           c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
198
 
199
#define function_name_decl_node         c_global_trees[CTI_FUNCTION_NAME_DECL]
200
#define pretty_function_name_decl_node  c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
201
#define c99_function_name_decl_node             c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
202
#define saved_function_name_decls       c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
203
 
204
/* A node for `((void) 0)'.  */
205
#define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
206
 
207
/* The node for C++ `__null'.  */
208
#define null_node                       c_global_trees[CTI_NULL]
209
 
210
extern GTY(()) tree c_global_trees[CTI_MAX];
211
 
212
/* In a RECORD_TYPE, a sorted array of the fields of the type, not a
213
   tree for size reasons.  */
214
struct sorted_fields_type GTY(())
215
{
216
  int len;
217
  tree GTY((length ("%h.len"))) elts[1];
218
};
219
 
220
/* Mark which labels are explicitly declared.
221
   These may be shadowed, and may be referenced from nested functions.  */
222
#define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
223
 
224
typedef enum c_language_kind
225
{
226
  clk_c         = 0,             /* C90, C94 or C99 */
227
  clk_objc      = 1,            /* clk_c with ObjC features.  */
228
  clk_cxx       = 2,            /* ANSI/ISO C++ */
229
  clk_objcxx    = 3             /* clk_cxx with ObjC features.  */
230
}
231
c_language_kind;
232
 
233
/* To test for a specific language use c_language, defined by each
234
   front end.  For "ObjC features" or "not C++" use the macros.  */
235
extern c_language_kind c_language;
236
 
237
#define c_dialect_cxx()         (c_language & clk_cxx)
238
#define c_dialect_objc()        (c_language & clk_objc)
239
 
240
/* Information about a statement tree.  */
241
 
242
struct stmt_tree_s GTY(()) {
243
  /* The current statement list being collected.  */
244
  tree x_cur_stmt_list;
245
 
246
  /* In C++, Nonzero if we should treat statements as full
247
     expressions.  In particular, this variable is no-zero if at the
248
     end of a statement we should destroy any temporaries created
249
     during that statement.  Similarly, if, at the end of a block, we
250
     should destroy any local variables in this block.  Normally, this
251
     variable is nonzero, since those are the normal semantics of
252
     C++.
253
 
254
     However, in order to represent aggregate initialization code as
255
     tree structure, we use statement-expressions.  The statements
256
     within the statement expression should not result in cleanups
257
     being run until the entire enclosing statement is complete.
258
 
259
     This flag has no effect in C.  */
260
  int stmts_are_full_exprs_p;
261
};
262
 
263
typedef struct stmt_tree_s *stmt_tree;
264
 
265
/* Global state pertinent to the current function.  Some C dialects
266
   extend this structure with additional fields.  */
267
 
268
struct c_language_function GTY(()) {
269
  /* While we are parsing the function, this contains information
270
     about the statement-tree that we are building.  */
271
  struct stmt_tree_s x_stmt_tree;
272
};
273
 
274
/* When building a statement-tree, this is the current statement list
275
   being collected.  It's TREE_CHAIN is a back-pointer to the previous
276
   statement list.  */
277
 
278
#define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
279
 
280
/* Language-specific hooks.  */
281
 
282
/* Callback that determines if it's ok for a function to have no
283
   noreturn attribute.  */
284
extern int (*lang_missing_noreturn_ok_p) (tree);
285
 
286
/* If non-NULL, this function is called after a precompile header file
287
   is loaded.  */
288
extern void (*lang_post_pch_load) (void);
289
 
290
extern void push_file_scope (void);
291
extern void pop_file_scope (void);
292
extern stmt_tree current_stmt_tree (void);
293
extern tree push_stmt_list (void);
294
extern tree pop_stmt_list (tree);
295
extern tree add_stmt (tree);
296
extern void push_cleanup (tree, tree, bool);
297
extern tree pushdecl_top_level (tree);
298
extern tree pushdecl (tree);
299
extern tree build_modify_expr (tree, enum tree_code, tree);
300
extern tree build_indirect_ref (tree, const char *);
301
 
302
extern int c_expand_decl (tree);
303
 
304
extern int field_decl_cmp (const void *, const void *);
305
extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
306
                                  void *);
307
extern bool has_c_linkage (tree decl);
308
 
309
/* Switches common to the C front ends.  */
310
 
311
/* Nonzero if prepreprocessing only.  */
312
 
313
extern int flag_preprocess_only;
314
 
315
/* Zero means that faster, ...NonNil variants of objc_msgSend...
316
   calls will be used in ObjC; passing nil receivers to such calls
317
   will most likely result in crashes.  */
318
extern int flag_nil_receivers;
319
 
320
/* Nonzero means that we will allow new ObjC exception syntax (@throw,
321
   @try, etc.) in source code.  */
322
extern int flag_objc_exceptions;
323
 
324
/* Nonzero means that we generate NeXT setjmp based exceptions.  */
325
extern int flag_objc_sjlj_exceptions;
326
 
327
/* Nonzero means that code generation will be altered to support
328
   "zero-link" execution.  This currently affects ObjC only, but may
329
   affect other languages in the future.  */
330
extern int flag_zero_link;
331
 
332
/* Nonzero means emit an '__OBJC, __image_info' for the current translation
333
   unit.  It will inform the ObjC runtime that class definition(s) herein
334
   contained are to replace one(s) previously loaded.  */
335
extern int flag_replace_objc_classes;
336
 
337
/* Nonzero means don't output line number information.  */
338
 
339
extern char flag_no_line_commands;
340
 
341
/* Nonzero causes -E output not to be done, but directives such as
342
   #define that have side effects are still obeyed.  */
343
 
344
extern char flag_no_output;
345
 
346
/* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
347
   'N' of the command line switch.  */
348
 
349
extern char flag_dump_macros;
350
 
351
/* Nonzero means pass #include lines through to the output.  */
352
 
353
extern char flag_dump_includes;
354
 
355
/* Nonzero means process PCH files while preprocessing.  */
356
 
357
extern bool flag_pch_preprocess;
358
 
359
/* The file name to which we should write a precompiled header, or
360
   NULL if no header will be written in this compile.  */
361
 
362
extern const char *pch_file;
363
 
364
/* Nonzero if an ISO standard was selected.  It rejects macros in the
365
   user's namespace.  */
366
 
367
extern int flag_iso;
368
 
369
/* Nonzero if -undef was given.  It suppresses target built-in macros
370
   and assertions.  */
371
 
372
extern int flag_undef;
373
 
374
/* Nonzero means don't recognize the non-ANSI builtin functions.  */
375
 
376
extern int flag_no_builtin;
377
 
378
/* Nonzero means don't recognize the non-ANSI builtin functions.
379
   -ansi sets this.  */
380
 
381
extern int flag_no_nonansi_builtin;
382
 
383
/* Nonzero means give `double' the same size as `float'.  */
384
 
385
extern int flag_short_double;
386
 
387
/* Nonzero means give `wchar_t' the same size as `short'.  */
388
 
389
extern int flag_short_wchar;
390
 
391
/* Nonzero means allow Microsoft extensions without warnings or errors.  */
392
extern int flag_ms_extensions;
393
 
394
/* Nonzero means don't recognize the keyword `asm'.  */
395
 
396
extern int flag_no_asm;
397
 
398
/* Nonzero means give string constants the type `const char *', as mandated
399
   by the standard.  */
400
 
401
extern int flag_const_strings;
402
 
403
/* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
404
 
405
extern int flag_signed_bitfields;
406
 
407
/* Warn about #pragma directives that are not recognized.  */
408
 
409
extern int warn_unknown_pragmas; /* Tri state variable.  */
410
 
411
/* Warn about format/argument anomalies in calls to formatted I/O functions
412
   (*printf, *scanf, strftime, strfmon, etc.).  */
413
 
414
extern int warn_format;
415
 
416
 
417
/* C/ObjC language option variables.  */
418
 
419
 
420
/* Nonzero means allow type mismatches in conditional expressions;
421
   just make their values `void'.  */
422
 
423
extern int flag_cond_mismatch;
424
 
425
/* Nonzero means enable C89 Amendment 1 features.  */
426
 
427
extern int flag_isoc94;
428
 
429
/* Nonzero means use the ISO C99 dialect of C.  */
430
 
431
extern int flag_isoc99;
432
 
433
/* Nonzero means that we have builtin functions, and main is an int.  */
434
 
435
extern int flag_hosted;
436
 
437
/* Warn if main is suspicious.  */
438
 
439
extern int warn_main;
440
 
441
 
442
/* ObjC language option variables.  */
443
 
444
 
445
/* Open and close the file for outputting class declarations, if
446
   requested (ObjC).  */
447
 
448
extern int flag_gen_declaration;
449
 
450
/* Tells the compiler that this is a special run.  Do not perform any
451
   compiling, instead we are to test some platform dependent features
452
   and output a C header file with appropriate definitions.  */
453
 
454
extern int print_struct_values;
455
 
456
/* ???.  Undocumented.  */
457
 
458
extern const char *constant_string_class_name;
459
 
460
 
461
/* C++ language option variables.  */
462
 
463
 
464
/* Nonzero means don't recognize any extension keywords.  */
465
 
466
extern int flag_no_gnu_keywords;
467
 
468
/* Nonzero means do emit exported implementations of functions even if
469
   they can be inlined.  */
470
 
471
extern int flag_implement_inlines;
472
 
473
/* Nonzero means that implicit instantiations will be emitted if needed.  */
474
 
475
extern int flag_implicit_templates;
476
 
477
/* Nonzero means that implicit instantiations of inline templates will be
478
   emitted if needed, even if instantiations of non-inline templates
479
   aren't.  */
480
 
481
extern int flag_implicit_inline_templates;
482
 
483
/* Nonzero means generate separate instantiation control files and
484
   juggle them at link time.  */
485
 
486
extern int flag_use_repository;
487
 
488
/* Nonzero if we want to issue diagnostics that the standard says are not
489
   required.  */
490
 
491
extern int flag_optional_diags;
492
 
493
/* Nonzero means we should attempt to elide constructors when possible.  */
494
 
495
extern int flag_elide_constructors;
496
 
497
/* Nonzero means that member functions defined in class scope are
498
   inline by default.  */
499
 
500
extern int flag_default_inline;
501
 
502
/* Controls whether compiler generates 'type descriptor' that give
503
   run-time type information.  */
504
 
505
extern int flag_rtti;
506
 
507
/* Nonzero if we want to conserve space in the .o files.  We do this
508
   by putting uninitialized data and runtime initialized data into
509
   .common instead of .data at the expense of not flagging multiple
510
   definitions.  */
511
 
512
extern int flag_conserve_space;
513
 
514
/* Nonzero if we want to obey access control semantics.  */
515
 
516
extern int flag_access_control;
517
 
518
/* Nonzero if we want to check the return value of new and avoid calling
519
   constructors if it is a null pointer.  */
520
 
521
extern int flag_check_new;
522
 
523
/* Nonzero if we want the new ISO rules for pushing a new scope for `for'
524
   initialization variables.
525
   0: Old rules, set by -fno-for-scope.
526
   2: New ISO rules, set by -ffor-scope.
527
   1: Try to implement new ISO rules, but with backup compatibility
528
   (and warnings).  This is the default, for now.  */
529
 
530
extern int flag_new_for_scope;
531
 
532
/* Nonzero if we want to emit defined symbols with common-like linkage as
533
   weak symbols where possible, in order to conform to C++ semantics.
534
   Otherwise, emit them as local symbols.  */
535
 
536
extern int flag_weak;
537
 
538
/* 0 means we want the preprocessor to not emit line directives for
539
   the current working directory.  1 means we want it to do it.  -1
540
   means we should decide depending on whether debugging information
541
   is being emitted or not.  */
542
 
543
extern int flag_working_directory;
544
 
545
/* Nonzero to use __cxa_atexit, rather than atexit, to register
546
   destructors for local statics and global objects.  */
547
 
548
extern int flag_use_cxa_atexit;
549
 
550
/* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
551
   logic.  */
552
 
553
extern int flag_use_cxa_get_exception_ptr;
554
 
555
/* Nonzero means make the default pedwarns warnings instead of errors.
556
   The value of this flag is ignored if -pedantic is specified.  */
557
 
558
extern int flag_permissive;
559
 
560
/* Nonzero means to implement standard semantics for exception
561
   specifications, calling unexpected if an exception is thrown that
562
   doesn't match the specification.  Zero means to treat them as
563
   assertions and optimize accordingly, but not check them.  */
564
 
565
extern int flag_enforce_eh_specs;
566
 
567
/* Nonzero (the default) means to generate thread-safe code for
568
   initializing local statics.  */
569
 
570
extern int flag_threadsafe_statics;
571
 
572
/* Nonzero means warn about implicit declarations.  */
573
 
574
extern int warn_implicit;
575
 
576
/* Warn about using __null (as NULL in C++) as sentinel.  For code compiled
577
   with GCC this doesn't matter as __null is guaranteed to have the right
578
   size.  */
579
 
580
extern int warn_strict_null_sentinel;
581
 
582
/* Maximum template instantiation depth.  This limit is rather
583
   arbitrary, but it exists to limit the time it takes to notice
584
   infinite template instantiations.  */
585
 
586
extern int max_tinst_depth;
587
 
588
/* Nonzero means the expression being parsed will never be evaluated.
589
   This is a count, since unevaluated expressions can nest.  */
590
 
591
extern int skip_evaluation;
592
 
593
/* C types are partitioned into three subsets: object, function, and
594
   incomplete types.  */
595
#define C_TYPE_OBJECT_P(type) \
596
  (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
597
 
598
#define C_TYPE_INCOMPLETE_P(type) \
599
  (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
600
 
601
#define C_TYPE_FUNCTION_P(type) \
602
  (TREE_CODE (type) == FUNCTION_TYPE)
603
 
604
/* For convenience we define a single macro to identify the class of
605
   object or incomplete types.  */
606
#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
607
  (!C_TYPE_FUNCTION_P (type))
608
 
609
/* Attribute table common to the C front ends.  */
610
extern const struct attribute_spec c_common_attribute_table[];
611
extern const struct attribute_spec c_common_format_attribute_table[];
612
 
613
/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
614
   ID is the identifier to use, NAME is the string.
615
   TYPE_DEP indicates whether it depends on type of the function or not
616
   (i.e. __PRETTY_FUNCTION__).  */
617
 
618
extern tree (*make_fname_decl) (tree, int);
619
 
620
extern tree identifier_global_value (tree);
621
extern void record_builtin_type (enum rid, const char *, tree);
622
extern tree build_void_list_node (void);
623
extern void start_fname_decls (void);
624
extern void finish_fname_decls (void);
625
extern const char *fname_as_string (int);
626
extern tree fname_decl (unsigned, tree);
627
 
628
extern void check_function_arguments (tree, tree, tree);
629
extern void check_function_arguments_recurse (void (*)
630
                                              (void *, tree,
631
                                               unsigned HOST_WIDE_INT),
632
                                              void *, tree,
633
                                              unsigned HOST_WIDE_INT);
634
extern void check_function_format (tree, tree);
635
extern void set_Wformat (int);
636
extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
637
extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
638
extern int c_common_handle_option (size_t code, const char *arg, int value);
639
extern bool c_common_missing_argument (const char *opt, size_t code);
640
extern tree c_common_type_for_mode (enum machine_mode, int);
641
extern tree c_common_type_for_size (unsigned int, int);
642
extern tree c_common_unsigned_type (tree);
643
extern tree c_common_signed_type (tree);
644
extern tree c_common_signed_or_unsigned_type (int, tree);
645
extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
646
extern tree c_common_truthvalue_conversion (tree);
647
extern void c_apply_type_quals_to_decl (int, tree);
648
extern tree c_sizeof_or_alignof_type (tree, bool, int);
649
extern tree c_alignof_expr (tree);
650
/* Print an error message for invalid operands to arith operation CODE.
651
   NOP_EXPR is used as a special case (see truthvalue_conversion).  */
652
extern void binary_op_error (enum tree_code);
653
extern tree fix_string_type (tree);
654
struct varray_head_tag;
655
extern void constant_expression_warning (tree);
656
extern void strict_aliasing_warning(tree, tree, tree);
657
extern void empty_body_warning (tree, tree);
658
extern tree convert_and_check (tree, tree);
659
extern void overflow_warning (tree);
660
extern bool c_determine_visibility (tree);
661
extern bool same_scalar_type_ignoring_signedness (tree, tree);
662
 
663
#define c_sizeof(T)  c_sizeof_or_alignof_type (T, true, 1)
664
#define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
665
 
666
/* Subroutine of build_binary_op, used for comparison operations.
667
   See if the operands have both been converted from subword integer types
668
   and, if so, perhaps change them both back to their original type.  */
669
extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
670
 
671
extern tree pointer_int_sum (enum tree_code, tree, tree);
672
extern unsigned int min_precision (tree, int);
673
 
674
/* Add qualifiers to a type, in the fashion for C.  */
675
extern tree c_build_qualified_type (tree, int);
676
 
677
/* Build tree nodes and builtin functions common to both C and C++ language
678
   frontends.  */
679
extern void c_common_nodes_and_builtins (void);
680
 
681
extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
682
 
683
extern void disable_builtin_function (const char *);
684
 
685
extern void set_compound_literal_name (tree decl);
686
 
687
extern tree build_va_arg (tree, tree);
688
 
689
extern unsigned int c_common_init_options (unsigned int, const char **);
690
extern bool c_common_post_options (const char **);
691
extern bool c_common_init (void);
692
extern void c_common_finish (void);
693
extern void c_common_parse_file (int);
694
extern HOST_WIDE_INT c_common_get_alias_set (tree);
695
extern void c_register_builtin_type (tree, const char*);
696
extern bool c_promoting_integer_type_p (tree);
697
extern int self_promoting_args_p (tree);
698
extern tree strip_array_types (tree);
699
extern tree strip_pointer_operator (tree);
700
extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
701
 
702
/* This is the basic parsing function.  */
703
extern void c_parse_file (void);
704
/* This is misnamed, it actually performs end-of-compilation processing.  */
705
extern void finish_file (void);
706
 
707
 
708
/* These macros provide convenient access to the various _STMT nodes.  */
709
 
710
/* Nonzero if a given STATEMENT_LIST represents the outermost binding
711
   if a statement expression.  */
712
#define STATEMENT_LIST_STMT_EXPR(NODE) \
713
  TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
714
 
715
/* Nonzero if a label has been added to the statement list.  */
716
#define STATEMENT_LIST_HAS_LABEL(NODE) \
717
  TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
718
 
719
/* COMPOUND_LITERAL_EXPR accessors.  */
720
#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE)           \
721
  TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
722
#define COMPOUND_LITERAL_EXPR_DECL(NODE)                        \
723
  DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
724
 
725
#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
726
 
727
enum c_tree_code {
728
  C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
729
#include "c-common.def"
730
  LAST_C_TREE_CODE
731
};
732
 
733
#undef DEFTREECODE
734
 
735
extern int anon_aggr_type_p (tree);
736
 
737
/* For a VAR_DECL that is an anonymous union, these are the various
738
   sub-variables that make up the anonymous union.  */
739
#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
740
 
741
/* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
742
#define DECL_C_BIT_FIELD(NODE) \
743
  (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
744
#define SET_DECL_C_BIT_FIELD(NODE) \
745
  (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
746
#define CLEAR_DECL_C_BIT_FIELD(NODE) \
747
  (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
748
 
749
extern void emit_local_var (tree);
750
extern tree do_case (tree, tree);
751
extern tree build_stmt (enum tree_code, ...);
752
extern tree build_case_label (tree, tree, tree);
753
 
754
/* These functions must be defined by each front-end which implements
755
   a variant of the C language.  They are used in c-common.c.  */
756
 
757
extern tree build_unary_op (enum tree_code, tree, int);
758
extern tree build_binary_op (enum tree_code, tree, tree, int);
759
extern tree perform_integral_promotions (tree);
760
 
761
/* These functions must be defined by each front-end which implements
762
   a variant of the C language.  They are used by port files.  */
763
 
764
extern tree default_conversion (tree);
765
 
766
/* Given two integer or real types, return the type for their sum.
767
   Given two compatible ANSI C types, returns the merged type.  */
768
 
769
extern tree common_type (tree, tree);
770
 
771
extern tree decl_constant_value (tree);
772
 
773
/* Handle increment and decrement of boolean types.  */
774
extern tree boolean_increment (enum tree_code, tree);
775
 
776
extern int case_compare (splay_tree_key, splay_tree_key);
777
 
778
extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
779
 
780
extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
781
 
782
extern tree build_function_call (tree, tree);
783
 
784
extern tree resolve_overloaded_builtin (tree, tree);
785
 
786
extern tree finish_label_address_expr (tree);
787
 
788
/* Same function prototype, but the C and C++ front ends have
789
   different implementations.  Used in c-common.c.  */
790
extern tree lookup_label (tree);
791
extern tree lookup_name (tree);
792
 
793
extern int vector_types_convertible_p (tree t1, tree t2);
794
 
795
extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
796
 
797
extern tree c_staticp (tree);
798
 
799
extern void init_c_lex (void);
800
 
801
extern void c_cpp_builtins (cpp_reader *);
802
 
803
/* Positive if an implicit `extern "C"' scope has just been entered;
804
   negative if such a scope has just been exited.  */
805
extern GTY(()) int pending_lang_change;
806
 
807
/* Information recorded about each file examined during compilation.  */
808
 
809
struct c_fileinfo
810
{
811
  int time;     /* Time spent in the file.  */
812
 
813
  /* Flags used only by C++.
814
     INTERFACE_ONLY nonzero means that we are in an "interface" section
815
     of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
816
     the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
817
     INTERFACE_ONLY is zero, it means that we are responsible for
818
     exporting definitions that others might need.  */
819
  short interface_only;
820
  short interface_unknown;
821
};
822
 
823
struct c_fileinfo *get_fileinfo (const char *);
824
extern void dump_time_statistics (void);
825
 
826
extern bool c_dump_tree (void *, tree);
827
 
828
extern void c_warn_unused_result (tree *);
829
 
830
extern void verify_sequence_points (tree);
831
 
832
extern tree fold_offsetof (tree, tree);
833
 
834
/* Places where an lvalue, or modifiable lvalue, may be required.
835
   Used to select diagnostic messages in lvalue_error and
836
   readonly_error.  */
837
enum lvalue_use {
838
  lv_assign,
839
  lv_increment,
840
  lv_decrement,
841
  lv_addressof,
842
  lv_asm
843
};
844
 
845
extern void lvalue_error (enum lvalue_use);
846
 
847
extern int complete_array_type (tree *, tree, bool);
848
 
849
extern tree builtin_type_for_size (int, bool);
850
 
851
extern void warn_array_subscript_with_type_char (tree);
852
 
853
/* In c-gimplify.c  */
854
extern void c_genericize (tree);
855
extern int c_gimplify_expr (tree *, tree *, tree *);
856
extern tree c_build_bind_expr (tree, tree);
857
 
858
/* In c-pch.c  */
859
extern void pch_init (void);
860
extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
861
extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
862
                               const char *orig);
863
extern void c_common_write_pch (void);
864
extern void c_common_no_more_pch (void);
865
extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
866
extern void c_common_print_pch_checksum (FILE *f);
867
 
868
/* In *-checksum.c */
869
extern const unsigned char executable_checksum[16];
870
 
871
extern void builtin_define_with_value (const char *, const char *, int);
872
extern void c_stddef_cpp_builtins (void);
873
extern void fe_file_change (const struct line_map *);
874
extern void c_parse_error (const char *, enum cpp_ttype, tree);
875
 
876
/* Objective-C / Objective-C++ entry points.  */
877
 
878
/* The following ObjC/ObjC++ functions are called by the C and/or C++
879
   front-ends; they all must have corresponding stubs in stub-objc.c.  */
880
extern tree objc_is_class_name (tree);
881
extern tree objc_is_object_ptr (tree);
882
extern void objc_check_decl (tree);
883
extern int objc_is_reserved_word (tree);
884
extern bool objc_compare_types (tree, tree, int, tree);
885
extern void objc_volatilize_decl (tree);
886
extern bool objc_type_quals_match (tree, tree);
887
extern tree objc_rewrite_function_call (tree, tree);
888
extern tree objc_message_selector (void);
889
extern tree objc_lookup_ivar (tree, tree);
890
extern void objc_clear_super_receiver (void);
891
extern int objc_is_public (tree, tree);
892
extern tree objc_is_id (tree);
893
extern void objc_declare_alias (tree, tree);
894
extern void objc_declare_class (tree);
895
extern void objc_declare_protocols (tree);
896
extern tree objc_build_message_expr (tree);
897
extern tree objc_finish_message_expr (tree, tree, tree);
898
extern tree objc_build_selector_expr (tree);
899
extern tree objc_build_protocol_expr (tree);
900
extern tree objc_build_encode_expr (tree);
901
extern tree objc_build_string_object (tree);
902
extern tree objc_get_protocol_qualified_type (tree, tree);
903
extern tree objc_get_class_reference (tree);
904
extern tree objc_get_class_ivars (tree);
905
extern void objc_start_class_interface (tree, tree, tree);
906
extern void objc_start_category_interface (tree, tree, tree);
907
extern void objc_start_protocol (tree, tree);
908
extern void objc_continue_interface (void);
909
extern void objc_finish_interface (void);
910
extern void objc_start_class_implementation (tree, tree);
911
extern void objc_start_category_implementation (tree, tree);
912
extern void objc_continue_implementation (void);
913
extern void objc_finish_implementation (void);
914
extern void objc_set_visibility (int);
915
extern void objc_set_method_type (enum tree_code);
916
extern tree objc_build_method_signature (tree, tree, tree, bool);
917
extern void objc_add_method_declaration (tree);
918
extern void objc_start_method_definition (tree);
919
extern void objc_finish_method_definition (tree);
920
extern void objc_add_instance_variable (tree);
921
extern tree objc_build_keyword_decl (tree, tree, tree);
922
extern tree objc_build_throw_stmt (tree);
923
extern void objc_begin_try_stmt (location_t, tree);
924
extern tree objc_finish_try_stmt (void);
925
extern void objc_begin_catch_clause (tree);
926
extern void objc_finish_catch_clause (void);
927
extern void objc_build_finally_clause (location_t, tree);
928
extern tree objc_build_synchronized (location_t, tree, tree);
929
extern int objc_static_init_needed_p (void);
930
extern tree objc_generate_static_init_call (tree);
931
extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
932
 
933
/* The following are provided by the C and C++ front-ends, and called by
934
   ObjC/ObjC++.  */
935
extern void *objc_get_current_scope (void);
936
extern void objc_mark_locals_volatile (void *);
937
 
938
/* In c-ppoutput.c  */
939
extern void init_pp_output (FILE *);
940
extern void preprocess_file (cpp_reader *);
941
extern void pp_file_change (const struct line_map *);
942
extern void pp_dir_change (cpp_reader *, const char *);
943
extern bool check_missing_format_attribute (tree, tree);
944
 
945
/* In c-omp.c  */
946
extern tree c_finish_omp_master (tree);
947
extern tree c_finish_omp_critical (tree, tree);
948
extern tree c_finish_omp_ordered (tree);
949
extern void c_finish_omp_barrier (void);
950
extern tree c_finish_omp_atomic (enum tree_code, tree, tree);
951
extern void c_finish_omp_flush (void);
952
extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
953
extern void c_split_parallel_clauses (tree, tree *, tree *);
954
extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
955
 
956
/* Not in c-omp.c; provided by the front end.  */
957
extern bool c_omp_sharing_predetermined (tree);
958
extern tree c_omp_remap_decl (tree, bool);
959
 
960
/* In order for the format checking to accept the C frontend
961
   diagnostic framework extensions, you must include this file before
962
   toplev.h, not after.  The C front end formats are a subset of those
963
   for C++, so they are the appropriate set to use in common code;
964
   cp-tree.h overrides this for C++.  */
965
#ifndef GCC_DIAG_STYLE
966
#define GCC_DIAG_STYLE __gcc_cdiag__
967
#endif
968
 
969
#endif /* ! GCC_C_COMMON_H */

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