Update to gcc-3.4.6
[dragonfly.git] / contrib / gcc-3.4 / gcc / c-common.h
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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
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING. If not, write to the Free
19Software Foundation, 59 Temple Place - Suite 330, Boston, MA
2002111-1307, 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
53enum 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. */
130extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
131
132/* Standard named or nameless data types of the C compiler. */
133
134enum 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. */
180struct 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 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
223extern 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. */
227struct 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
241typedef 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}
248c_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. */
252extern 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
259struct 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
284typedef 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
289struct 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
324extern void (*lang_expand_stmt) (tree);
325extern void (*lang_expand_decl_stmt) (tree);
326extern void (*lang_expand_function_end) (void);
327
328/* Callback that determines if it's ok for a function to have no
329 noreturn attribute. */
330extern int (*lang_missing_noreturn_ok_p) (tree);
331
332extern int yyparse (void);
333extern stmt_tree current_stmt_tree (void);
334extern tree *current_scope_stmt_stack (void);
335extern void begin_stmt_tree (tree *);
336extern tree add_stmt (tree);
337extern void add_decl_stmt (tree);
338extern tree add_scope_stmt (int, int);
339extern void finish_stmt_tree (tree *);
340
341extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
342extern void prep_stmt (tree);
343extern void expand_stmt (tree);
344extern tree c_begin_if_stmt (void);
345extern tree c_begin_while_stmt (void);
346extern void c_finish_while_stmt_cond (tree, tree);
347
348extern int field_decl_cmp (const void *, const void *);
349extern 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
356extern 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. */
361extern int flag_nil_receivers;
362
363/* Nonzero means that we will allow new ObjC exception syntax (@throw,
364 @try, etc.) in source code. */
365extern 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. */
370extern 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. */
375extern int flag_replace_objc_classes;
376
377/* Nonzero means don't output line number information. */
378
379extern 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
384extern 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
389extern char flag_dump_macros;
390
391/* Nonzero means pass #include lines through to the output. */
392
393extern 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
398extern const char *pch_file;
399
400/* Nonzero if an ISO standard was selected. It rejects macros in the
401 user's namespace. */
402
403extern int flag_iso;
404
405/* Nonzero if -undef was given. It suppresses target built-in macros
406 and assertions. */
407
408extern int flag_undef;
409
410/* Nonzero means don't recognize the non-ANSI builtin functions. */
411
412extern int flag_no_builtin;
413
414/* Nonzero means don't recognize the non-ANSI builtin functions.
415 -ansi sets this. */
416
417extern int flag_no_nonansi_builtin;
418
419/* Nonzero means give `double' the same size as `float'. */
420
421extern int flag_short_double;
422
423/* Nonzero means give `wchar_t' the same size as `short'. */
424
425extern int flag_short_wchar;
426
427/* Nonzero means allow Microsoft extensions without warnings or errors. */
428extern int flag_ms_extensions;
429
430/* Nonzero means don't recognize the keyword `asm'. */
431
432extern int flag_no_asm;
433
434/* Nonzero means give string constants the type `const char *', as mandated
435 by the standard. */
436
437extern int flag_const_strings;
438
439/* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
440
441extern int flag_signed_bitfields;
442extern 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
447extern int warn_cast_qual;
448
449/* Warn about functions which might be candidates for format attributes. */
450
451extern int warn_missing_format_attribute;
452
453/* Nonzero means warn about sizeof(function) or addition/subtraction
454 of function pointers. */
455
456extern int warn_pointer_arith;
457
458/* Nonzero means warn for any global function def
459 without separate previous prototype decl. */
460
461extern int warn_missing_prototypes;
462
463/* Warn if adding () is suggested. */
464
465extern int warn_parentheses;
466
467/* Warn if initializer is not completely bracketed. */
468
469extern 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
474extern int warn_sign_compare;
475
476/* Nonzero means warn about usage of long long when `-pedantic'. */
477
478extern int warn_long_long;
479
480/* Nonzero means warn about deprecated conversion from string constant to
481 `char *'. */
482
483extern int warn_write_strings;
484
485/* Nonzero means warn about multiple (redundant) decls for the same single
486 variable or function. */
487
488extern int warn_redundant_decls;
489
490/* Warn about testing equality of floating point numbers. */
491
492extern int warn_float_equal;
493
494/* Warn about a subscript that has type char. */
495
496extern int warn_char_subscripts;
497
498/* Warn if a type conversion is done that might have confusing results. */
499
500extern int warn_conversion;
501
502/* Warn about #pragma directives that are not recognized. */
503
504extern 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
509extern int warn_format;
510
511/* Warn about Y2K problems with strftime formats. */
512
513extern int warn_format_y2k;
514
515/* Warn about excess arguments to formats. */
516
517extern int warn_format_extra_args;
518
519/* Warn about zero-length formats. */
520
521extern int warn_format_zero_length;
522
523/* Warn about non-literal format arguments. */
524
525extern int warn_format_nonliteral;
526
527/* Warn about possible security problems with calls to format functions. */
528
529extern 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
538extern int mesg_implicit_function_declaration;
539
540/* Nonzero means allow type mismatches in conditional expressions;
541 just make their values `void'. */
542
543extern int flag_cond_mismatch;
544
545/* Nonzero means enable C89 Amendment 1 features. */
546
547extern int flag_isoc94;
548
549/* Nonzero means use the ISO C99 dialect of C. */
550
551extern int flag_isoc99;
552
553/* Nonzero means that we have builtin functions, and main is an int. */
554
555extern 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
561extern int warn_bad_function_cast;
562
563/* Warn about traditional constructs whose meanings changed in ANSI C. */
564
565extern int warn_traditional;
566
567/* Nonzero means warn for a declaration found after a statement. */
568
569extern int warn_declaration_after_statement;
570
571/* Nonzero means warn for non-prototype function decls
572 or non-prototyped defs without previous prototype. */
573
574extern int warn_strict_prototypes;
575
576/* Nonzero means warn for any global function def
577 without separate previous decl. */
578
579extern 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
587extern int warn_nested_externs;
588
589/* Warn if main is suspicious. */
590
591extern int warn_main;
592
593/* Nonzero means warn about possible violations of sequence point rules. */
594
595extern 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
600extern int warn_init_self;
601
602
603/* Nonzero means to warn about compile-time division by zero. */
604extern int warn_div_by_zero;
605
606/* Nonzero means warn about use of implicit int. */
607
608extern int warn_implicit_int;
609
610/* Warn about NULL being passed to argument slots marked as requiring
611 non-NULL. */
612
613extern int warn_nonnull;
614
615/* Warn about old-style parameter declaration. */
616
617extern 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
626extern int flag_gen_declaration;
627
628/* Generate code for GNU or NeXT runtime environment. */
629
630extern 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
636extern int print_struct_values;
637
638/* ???. Undocumented. */
639
640extern 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
646extern 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
653extern 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
659extern int warn_protocol;
660
661
662/* C++ language option variables. */
663
664
665/* Nonzero means don't recognize any extension keywords. */
666
667extern int flag_no_gnu_keywords;
668
669/* Nonzero means do emit exported implementations of functions even if
670 they can be inlined. */
671
672extern int flag_implement_inlines;
673
674/* Nonzero means that implicit instantiations will be emitted if needed. */
675
676extern 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
682extern int flag_implicit_inline_templates;
683
684/* Nonzero means generate separate instantiation control files and
685 juggle them at link time. */
686
687extern int flag_use_repository;
688
689/* Nonzero if we want to issue diagnostics that the standard says are not
690 required. */
691
692extern int flag_optional_diags;
693
694/* Nonzero means we should attempt to elide constructors when possible. */
695
696extern int flag_elide_constructors;
697
698/* Nonzero means that member functions defined in class scope are
699 inline by default. */
700
701extern int flag_default_inline;
702
703/* Controls whether compiler generates 'type descriptor' that give
704 run-time type information. */
705
706extern 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
713extern int flag_conserve_space;
714
715/* Nonzero if we want to obey access control semantics. */
716
717extern 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
722extern 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
731extern 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
737extern 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
744extern 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
749extern 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
754extern 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
761extern int flag_enforce_eh_specs;
762
763/* Nonzero means warn about things that will change when compiling
764 with an ABI-compliant compiler. */
765
766extern int warn_abi;
767
768/* Nonzero means warn about invalid uses of offsetof. */
769
770extern int warn_invalid_offsetof;
771
772/* Nonzero means warn about implicit declarations. */
773
774extern int warn_implicit;
775
776/* Nonzero means warn when all ctors or dtors are private, and the class
777 has no friends. */
778
779extern 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
785extern 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
790extern int warn_nonvdtor;
791
792/* Nonzero means warn when the compiler will reorder code. */
793
794extern int warn_reorder;
795
796/* Nonzero means warn when synthesis behavior differs from Cfront's. */
797
798extern 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
803extern int warn_pmf2ptr;
804
805/* Nonzero means warn about violation of some Effective C++ style rules. */
806
807extern 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
812extern int warn_sign_promo;
813
814/* Nonzero means warn when an old-style cast is used. */
815
816extern int warn_old_style_cast;
817
818/* Nonzero means warn when non-templatized friend functions are
819 declared within a template */
820
821extern int warn_nontemplate_friend;
822
823/* Nonzero means complain about deprecated features. */
824
825extern 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
831extern 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
836extern 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. */
859extern const struct attribute_spec c_common_attribute_table[];
860extern 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
867extern tree (*make_fname_decl) (tree, int);
868
869extern tree identifier_global_value (tree);
870extern void record_builtin_type (enum rid, const char *, tree);
871extern tree build_void_list_node (void);
872extern void start_fname_decls (void);
873extern void finish_fname_decls (void);
874extern const char *fname_as_string (int);
875extern tree fname_decl (unsigned, tree);
876
877extern void check_function_arguments (tree, tree);
878extern void check_function_arguments_recurse (void (*)
879 (void *, tree,
880 unsigned HOST_WIDE_INT),
881 void *, tree,
882 unsigned HOST_WIDE_INT);
883extern void check_function_format (int *, tree, tree);
884extern void set_Wformat (int);
885extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
886extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
887extern int c_common_handle_option (size_t code, const char *arg, int value);
888extern bool c_common_missing_argument (const char *opt, size_t code);
889extern tree c_common_type_for_mode (enum machine_mode, int);
890extern tree c_common_type_for_size (unsigned int, int);
891extern tree c_common_unsigned_type (tree);
892extern tree c_common_signed_type (tree);
893extern tree c_common_signed_or_unsigned_type (int, tree);
894extern tree c_common_truthvalue_conversion (tree);
895extern void c_apply_type_quals_to_decl (int, tree);
896extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
897extern 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). */
900extern 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
904extern tree c_expand_expr_stmt (tree);
905extern void c_expand_start_cond (tree, int, tree);
906extern void c_finish_then (void);
907extern void c_expand_start_else (void);
908extern void c_finish_else (void);
909extern void c_expand_end_cond (void);
910/* Validate the expression after `case' and apply default promotions. */
911extern tree check_case_value (tree);
912extern tree fix_string_type (tree);
913struct varray_head_tag;
914extern void constant_expression_warning (tree);
915extern tree convert_and_check (tree, tree);
916extern void overflow_warning (tree);
917extern void unsigned_conversion_warning (tree, tree);
918
919/* Read the rest of the current #-directive line. */
920extern char *get_directive_line (void);
921#define GET_DIRECTIVE_LINE() get_directive_line ()
922#define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
923#define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
924
925/* Subroutine of build_binary_op, used for comparison operations.
926 See if the operands have both been converted from subword integer types
927 and, if so, perhaps change them both back to their original type. */
928extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
929
930extern tree pointer_int_sum (enum tree_code, tree, tree);
931extern unsigned int min_precision (tree, int);
932
933/* Add qualifiers to a type, in the fashion for C. */
934extern tree c_build_qualified_type (tree, int);
935
936/* Build tree nodes and builtin functions common to both C and C++ language
937 frontends. */
938extern void c_common_nodes_and_builtins (void);
939
940extern void disable_builtin_function (const char *);
941
942extern tree build_va_arg (tree, tree);
943
944extern unsigned int c_common_init_options (unsigned int, const char **);
945extern bool c_common_post_options (const char **);
946extern bool c_common_init (void);
947extern void c_common_finish (void);
948extern void c_common_parse_file (int);
949extern HOST_WIDE_INT c_common_get_alias_set (tree);
950extern void c_register_builtin_type (tree, const char*);
951extern bool c_promoting_integer_type_p (tree);
952extern int self_promoting_args_p (tree);
953extern tree strip_array_types (tree);
954extern tree strip_pointer_operator (tree);
955
956/* This function resets the parsers' state in preparation for parsing
957 a new file. */
958extern void c_reset_state (void);
959/* This is the basic parsing function. */
960extern void c_parse_file (void);
961/* This is misnamed, it actually performs end-of-compilation processing. */
962extern void finish_file (void);
963
964/* These macros provide convenient access to the various _STMT nodes. */
965
966/* Nonzero if this statement should be considered a full-expression,
967 i.e., if temporaries created during this statement should have
968 their destructors run at the end of this statement. (In C, this
969 will always be false, since there are no destructors.) */
970#define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
971
972/* IF_STMT accessors. These give access to the condition of the if
973 statement, the then block of the if statement, and the else block
974 of the if statement if it exists. */
975#define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
976#define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
977#define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
978
979/* WHILE_STMT accessors. These give access to the condition of the
980 while statement and the body of the while statement, respectively. */
981#define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
982#define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
983
984/* DO_STMT accessors. These give access to the condition of the do
985 statement and the body of the do statement, respectively. */
986#define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
987#define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
988
989/* RETURN_STMT accessors. These give the expression associated with a
990 return statement, and whether it should be ignored when expanding
991 (as opposed to inlining). */
992#define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
993
994/* EXPR_STMT accessor. This gives the expression associated with an
995 expression statement. */
996#define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
997
998/* FOR_STMT accessors. These give access to the init statement,
999 condition, update expression, and body of the for statement,
1000 respectively. */
1001#define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
1002#define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1003#define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1004#define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1005
1006/* SWITCH_STMT accessors. These give access to the condition, body and
1007 original condition type (before any compiler conversions)
1008 of the switch statement, respectively. */
1009#define SWITCH_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1010#define SWITCH_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1011#define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1012
1013/* CASE_LABEL accessors. These give access to the high and low values
1014 of a case label, respectively. */
1015#define CASE_LOW(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1016#define CASE_HIGH(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1017#define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1018
1019/* GOTO_STMT accessor. This gives access to the label associated with
1020 a goto statement. */
1021#define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1022/* True for goto created artificially by the compiler. */
1023#define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1024
1025/* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1026 statements associated with a compound statement. The result is the
1027 first statement in the list. Succeeding nodes can be accessed by
1028 calling TREE_CHAIN on a node in the list. */
1029#define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1030
1031/* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1032 instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1033 ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1034 statement. */
1035#define ASM_CV_QUAL(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1036#define ASM_STRING(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1037#define ASM_OUTPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1038#define ASM_INPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1039#define ASM_CLOBBERS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1040
1041/* DECL_STMT accessor. This gives access to the DECL associated with
1042 the given declaration statement. */
1043#define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1044
1045/* STMT_EXPR accessor. */
1046#define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1047
1048/* Nonzero if this statement-expression does not have an associated scope. */
1049#define STMT_EXPR_NO_SCOPE(NODE) \
1050 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1051
1052/* Nonzero if this statement-expression should cause warning if its result
1053 is not used. */
1054#define STMT_EXPR_WARN_UNUSED_RESULT(NODE) \
1055 TREE_LANG_FLAG_3 (STMT_EXPR_CHECK (NODE))
1056
1057/* LABEL_STMT accessor. This gives access to the label associated with
1058 the given label statement. */
1059#define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1060
1061/* COMPOUND_LITERAL_EXPR accessors. */
1062#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
1063 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1064#define COMPOUND_LITERAL_EXPR_DECL(NODE) \
1065 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1066
1067/* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
1068#define SCOPE_BEGIN_P(NODE) \
1069 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1070
1071/* Nonzero if this SCOPE_STMT is for the end of a scope. */
1072#define SCOPE_END_P(NODE) \
1073 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1074
1075/* The BLOCK containing the declarations contained in this scope. */
1076#define SCOPE_STMT_BLOCK(NODE) \
1077 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1078
1079/* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
1080#define SCOPE_NULLIFIED_P(NODE) \
1081 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1082
1083/* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1084 which should be treated as non-existent from the point of view of
1085 running cleanup actions. */
1086#define SCOPE_NO_CLEANUPS_P(NODE) \
1087 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1088
1089/* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1090 For example, in:
1091
1092 S s;
1093 l:
1094 S s2;
1095 goto l;
1096
1097 there is (implicitly) a new scope after `l', even though there are
1098 no curly braces. In particular, when we hit the goto, we must
1099 destroy s2 and then re-construct it. For the implicit scope,
1100 SCOPE_PARTIAL_P will be set. */
1101#define SCOPE_PARTIAL_P(NODE) \
1102 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1103
1104/* Nonzero for an ASM_STMT if the assembly statement is volatile. */
1105#define ASM_VOLATILE_P(NODE) \
1106 (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1107
1108/* The VAR_DECL to clean up in a CLEANUP_STMT. */
1109#define CLEANUP_DECL(NODE) \
1110 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1111/* The cleanup to run in a CLEANUP_STMT. */
1112#define CLEANUP_EXPR(NODE) \
1113 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1114
1115/* The filename we are changing to as of this FILE_STMT. */
1116#define FILE_STMT_FILENAME_NODE(NODE) \
1117 (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1118#define FILE_STMT_FILENAME(NODE) \
1119 (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1120
1121/* The line-number at which a statement began. But if
1122 STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1123 line number for the end of the current function instead. */
1124#define STMT_LINENO(NODE) \
1125 (TREE_COMPLEXITY ((NODE)))
1126
1127/* If nonzero, the STMT_LINENO for NODE is the line at which the
1128 function ended. */
1129#define STMT_LINENO_FOR_FN_P(NODE) \
1130 (TREE_LANG_FLAG_2 ((NODE)))
1131
1132/* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1133 initialization variables. */
1134#define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1135
1136/* Nonzero if we want to create an ASM_INPUT instead of an
1137 ASM_OPERAND with no operands. */
1138#define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1139
1140#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1141
1142enum c_tree_code {
1143 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1144#include "c-common.def"
1145 LAST_C_TREE_CODE
1146};
1147
1148#undef DEFTREECODE
1149
1150#define c_common_stmt_codes \
1151 CLEANUP_STMT, EXPR_STMT, COMPOUND_STMT, \
1152 DECL_STMT, IF_STMT, FOR_STMT, \
1153 WHILE_STMT, DO_STMT, RETURN_STMT, \
1154 BREAK_STMT, CONTINUE_STMT, SCOPE_STMT, \
1155 SWITCH_STMT, GOTO_STMT, LABEL_STMT, \
1156 ASM_STMT, FILE_STMT, CASE_LABEL
1157
1158/* TRUE if a code represents a statement. The front end init
1159 langhook should take care of initialization of this array. */
1160extern bool statement_code_p[MAX_TREE_CODES];
1161
1162#define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1163
1164#define INIT_STATEMENT_CODES(STMT_CODES) \
1165 do { \
1166 unsigned int i; \
1167 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
1168 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
1169 statement_code_p[STMT_CODES[i]] = true; \
1170 } while (0)
1171
1172extern void genrtl_do_pushlevel (void);
1173extern void genrtl_goto_stmt (tree);
1174extern void genrtl_expr_stmt (tree);
1175extern void genrtl_expr_stmt_value (tree, int, int);
1176extern void genrtl_decl_stmt (tree);
1177extern void genrtl_if_stmt (tree);
1178extern void genrtl_while_stmt (tree);
1179extern void genrtl_do_stmt (tree);
1180extern void genrtl_return_stmt (tree);
1181extern void genrtl_for_stmt (tree);
1182extern void genrtl_break_stmt (void);
1183extern void genrtl_continue_stmt (void);
1184extern void genrtl_scope_stmt (tree);
1185extern void genrtl_switch_stmt (tree);
1186extern void genrtl_case_label (tree);
1187extern void genrtl_compound_stmt (tree);
1188extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1189extern void genrtl_cleanup_stmt (tree);
1190extern int stmts_are_full_exprs_p (void);
1191extern int anon_aggr_type_p (tree);
1192
1193/* For a VAR_DECL that is an anonymous union, these are the various
1194 sub-variables that make up the anonymous union. */
1195#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1196
1197/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1198#define DECL_C_BIT_FIELD(NODE) \
1199 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1200#define SET_DECL_C_BIT_FIELD(NODE) \
1201 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1202#define CLEAR_DECL_C_BIT_FIELD(NODE) \
1203 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1204
1205/* In a VAR_DECL, nonzero if the decl is a register variable with
1206 an explicit asm specification. */
1207#define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1208
1209extern void emit_local_var (tree);
1210extern void make_rtl_for_local_static (tree);
1211extern tree expand_cond (tree);
1212extern tree c_expand_return (tree);
1213extern tree do_case (tree, tree);
1214extern tree build_stmt (enum tree_code, ...);
1215extern tree build_case_label (tree, tree, tree);
1216extern tree build_continue_stmt (void);
1217extern tree build_break_stmt (void);
1218extern tree build_return_stmt (tree);
1219
1220#define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
1221
1222/* Used by the C++ frontend to mark the block around the member
1223 initializers and cleanups. */
1224#define COMPOUND_STMT_BODY_BLOCK(NODE) TREE_LANG_FLAG_3 (NODE)
1225
1226extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1227
1228/* These functions must be defined by each front-end which implements
1229 a variant of the C language. They are used in c-common.c. */
1230
1231extern tree build_unary_op (enum tree_code, tree, int);
1232extern tree build_binary_op (enum tree_code, tree, tree, int);
1233extern int lvalue_p (tree);
1234extern tree default_conversion (tree);
1235
1236/* Given two integer or real types, return the type for their sum.
1237 Given two compatible ANSI C types, returns the merged type. */
1238
1239extern tree common_type (tree, tree);
1240
1241extern tree expand_tree_builtin (tree, tree, tree);
1242
1243extern tree decl_constant_value (tree);
1244
1245/* Handle increment and decrement of boolean types. */
1246extern tree boolean_increment (enum tree_code, tree);
1247
1248/* Hook currently used only by the C++ front end to reset internal state
1249 after entering or leaving a header file. */
1250extern void extract_interface_info (void);
1251
1252extern int case_compare (splay_tree_key, splay_tree_key);
1253
1254extern tree c_add_case_label (splay_tree, tree, tree, tree);
1255
1256extern tree build_function_call (tree, tree);
1257
1258extern tree finish_label_address_expr (tree);
1259
1260/* Same function prototype, but the C and C++ front ends have
1261 different implementations. Used in c-common.c. */
1262extern tree lookup_label (tree);
1263
1378ea41
SS
1264extern int vector_types_convertible_p (tree t1, tree t2);
1265
003757ed
MD
1266extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1267
1268extern int c_safe_from_p (rtx, tree);
1269
1270extern int c_staticp (tree);
1271
1272extern int c_common_unsafe_for_reeval (tree);
1273
1274extern void init_c_lex (void);
1275
1276extern void c_cpp_builtins (cpp_reader *);
1277
1278/* Positive if an implicit `extern "C"' scope has just been entered;
1279 negative if such a scope has just been exited. */
1280extern int pending_lang_change;
1281
1282/* Information recorded about each file examined during compilation. */
1283
1284struct c_fileinfo
1285{
1286 int time; /* Time spent in the file. */
1287 short interface_only; /* Flags - used only by C++ */
1288 short interface_unknown;
1289};
1290
1291struct c_fileinfo *get_fileinfo (const char *);
1292extern void dump_time_statistics (void);
1293
1294extern bool c_dump_tree (void *, tree);
1295
1296extern void pch_init (void);
1297extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1298extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1299 const char *orig);
1300extern void c_common_write_pch (void);
1301extern void c_common_no_more_pch (void);
1302extern void builtin_define_with_value (const char *, const char *, int);
1303extern void c_stddef_cpp_builtins (void);
1304extern void fe_file_change (const struct line_map *);
1305extern int c_estimate_num_insns (tree decl);
1306extern bool c_decl_uninit (tree t);
1307extern void c_parse_error (const char *, enum cpp_ttype, tree);
1308
1309/* The following have been moved here from c-tree.h, since they're needed
1310 in the ObjC++ world, too. What is more, stub-objc.c could use a few
1311 prototypes. */
1312extern tree lookup_interface (tree);
1313extern tree is_class_name (tree);
1314extern tree objc_is_object_ptr (tree);
1315extern void objc_check_decl (tree);
1316extern int objc_comptypes (tree, tree, int);
1317extern tree objc_message_selector (void);
1318extern tree lookup_objc_ivar (tree);
1319extern void *get_current_scope (void);
1320extern void objc_mark_locals_volatile (void *);
1321
1322/* In c-ppoutput.c */
1323extern void init_pp_output (FILE *);
1324extern void preprocess_file (cpp_reader *);
1325extern void pp_file_change (const struct line_map *);
1326extern void pp_dir_change (cpp_reader *, const char *);
1327
1328#endif /* ! GCC_C_COMMON_H */