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
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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,
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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(())
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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
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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
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. */
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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
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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 do not warn that K&R style main() is not a function prototype. */
454extern int flag_bsd_no_warn_kr_main;
455
456/* Nonzero means warn about sizeof(function) or addition/subtraction
457 of function pointers. */
458
459extern int warn_pointer_arith;
460
461/* Nonzero means warn for any global function def
462 without separate previous prototype decl. */
463
464extern int warn_missing_prototypes;
465
466/* Warn if adding () is suggested. */
467
468extern int warn_parentheses;
469
470/* Warn if initializer is not completely bracketed. */
471
472extern int warn_missing_braces;
473
474/* Warn about comparison of signed and unsigned values.
475 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
476
477extern int warn_sign_compare;
478
479/* Nonzero means warn about usage of long long when `-pedantic'. */
480
481extern int warn_long_long;
482
483/* Nonzero means warn about deprecated conversion from string constant to
484 `char *'. */
485
486extern int warn_write_strings;
487
488/* Nonzero means warn about multiple (redundant) decls for the same single
489 variable or function. */
490
491extern int warn_redundant_decls;
492
493/* Warn about testing equality of floating point numbers. */
494
495extern int warn_float_equal;
496
497/* Warn about a subscript that has type char. */
498
499extern int warn_char_subscripts;
500
501/* Warn if a type conversion is done that might have confusing results. */
502
503extern int warn_conversion;
504
505/* Warn about #pragma directives that are not recognized. */
506
507extern int warn_unknown_pragmas; /* Tri state variable. */
508
509/* Warn about format/argument anomalies in calls to formatted I/O functions
510 (*printf, *scanf, strftime, strfmon, etc.). */
511
512extern int warn_format;
513
514/* Warn about Y2K problems with strftime formats. */
515
516extern int warn_format_y2k;
517
518/* Warn about excess arguments to formats. */
519
520extern int warn_format_extra_args;
521
522/* Warn about zero-length formats. */
523
524extern int warn_format_zero_length;
525
526/* Warn about non-literal format arguments. */
527
528extern int warn_format_nonliteral;
529
530/* Warn about possible security problems with calls to format functions. */
531
532extern int warn_format_security;
533
534
535/* C/ObjC language option variables. */
536
537
538/* Nonzero means message about use of implicit function declarations;
539 1 means warning; 2 means error. */
540
541extern int mesg_implicit_function_declaration;
542
543/* Nonzero means allow type mismatches in conditional expressions;
544 just make their values `void'. */
545
546extern int flag_cond_mismatch;
547
548/* Nonzero means enable C89 Amendment 1 features. */
549
550extern int flag_isoc94;
551
552/* Nonzero means use the ISO C99 dialect of C. */
553
554extern int flag_isoc99;
555
556/* Nonzero means allow the BSD kernel printf enhancments. */
557
558extern int flag_bsd_format;
559
560/* Nonzero means that we have builtin functions, and main is an int. */
561
562extern int flag_hosted;
563
564/* Nonzero means warn when casting a function call to a type that does
565 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
566 when there is no previous declaration of sqrt or malloc. */
567
568extern int warn_bad_function_cast;
569
570/* Warn about traditional constructs whose meanings changed in ANSI C. */
571
572extern int warn_traditional;
573
574/* Nonzero means warn for a declaration found after a statement. */
575
576extern int warn_declaration_after_statement;
577
578/* Nonzero means warn for non-prototype function decls
579 or non-prototyped defs without previous prototype. */
580
581extern int warn_strict_prototypes;
582
583/* Nonzero means warn for any global function def
584 without separate previous decl. */
585
586extern int warn_missing_declarations;
587
588/* Nonzero means warn about extern declarations of objects not at
589 file-scope level and about *all* declarations of functions (whether
590 extern or static) not at file-scope level. Note that we exclude
591 implicit function declarations. To get warnings about those, use
592 -Wimplicit. */
593
594extern int warn_nested_externs;
595
596/* Warn if main is suspicious. */
597
598extern int warn_main;
599
600/* Nonzero means warn about possible violations of sequence point rules. */
601
602extern int warn_sequence_point;
603
604/* Nonzero means warn about uninitialized variable when it is initialized with itself.
605 For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
606
607extern int warn_init_self;
608
609
610/* Nonzero means to warn about compile-time division by zero. */
611extern int warn_div_by_zero;
612
613/* Nonzero means warn about use of implicit int. */
614
615extern int warn_implicit_int;
616
617/* Warn about NULL being passed to argument slots marked as requiring
618 non-NULL. */
619
620extern int warn_nonnull;
621
622/* Warn about old-style parameter declaration. */
623
624extern int warn_old_style_definition;
625
626
627/* ObjC language option variables. */
628
629
630/* Open and close the file for outputting class declarations, if
631 requested (ObjC). */
632
633extern int flag_gen_declaration;
634
635/* Generate code for GNU or NeXT runtime environment. */
636
637extern int flag_next_runtime;
638
639/* Tells the compiler that this is a special run. Do not perform any
640 compiling, instead we are to test some platform dependent features
641 and output a C header file with appropriate definitions. */
642
643extern int print_struct_values;
644
645/* ???. Undocumented. */
646
647extern const char *constant_string_class_name;
648
649/* Warn if multiple methods are seen for the same selector, but with
650 different argument types. Performs the check on the whole selector
651 table at the end of compilation. */
652
653extern int warn_selector;
654
655/* Warn if a @selector() is found, and no method with that selector
656 has been previously declared. The check is done on each
657 @selector() as soon as it is found - so it warns about forward
658 declarations. */
659
660extern int warn_undeclared_selector;
661
662/* Warn if methods required by a protocol are not implemented in the
663 class adopting it. When turned off, methods inherited to that
664 class are also considered implemented. */
665
666extern int warn_protocol;
667
668
669/* C++ language option variables. */
670
671
672/* Nonzero means don't recognize any extension keywords. */
673
674extern int flag_no_gnu_keywords;
675
676/* Nonzero means do emit exported implementations of functions even if
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750
751extern int flag_working_directory;
752
753/* Nonzero to use __cxa_atexit, rather than atexit, to register
754 destructors for local statics and global objects. */
755
756extern int flag_use_cxa_atexit;
757
758/* Nonzero means make the default pedwarns warnings instead of errors.
759 The value of this flag is ignored if -pedantic is specified. */
760
761extern int flag_permissive;
762
763/* Nonzero means to implement standard semantics for exception
764 specifications, calling unexpected if an exception is thrown that
765 doesn't match the specification. Zero means to treat them as
766 assertions and optimize accordingly, but not check them. */
767
768extern int flag_enforce_eh_specs;
769
770/* Nonzero means warn about things that will change when compiling
771 with an ABI-compliant compiler. */
772
773extern int warn_abi;
774
775/* Nonzero means warn about invalid uses of offsetof. */
776
777extern int warn_invalid_offsetof;
778
779/* Nonzero means warn about implicit declarations. */
780
781extern int warn_implicit;
782
783/* Nonzero means warn when all ctors or dtors are private, and the class
784 has no friends. */
785
786extern int warn_ctor_dtor_privacy;
787
788/* Nonzero means warn in function declared in derived class has the
789 same name as a virtual in the base class, but fails to match the
790 type signature of any virtual function in the base class. */
791
792extern int warn_overloaded_virtual;
793
794/* Nonzero means warn when declaring a class that has a non virtual
795 destructor, when it really ought to have a virtual one. */
796
797extern int warn_nonvdtor;
798
799/* Nonzero means warn when the compiler will reorder code. */
800
801extern int warn_reorder;
802
803/* Nonzero means warn when synthesis behavior differs from Cfront's. */
804
805extern int warn_synth;
806
807/* Nonzero means warn when we convert a pointer to member function
808 into a pointer to (void or function). */
809
810extern int warn_pmf2ptr;
811
812/* Nonzero means warn about violation of some Effective C++ style rules. */
813
814extern int warn_ecpp;
815
816/* Nonzero means warn where overload resolution chooses a promotion from
817 unsigned to signed over a conversion to an unsigned of the same size. */
818
819extern int warn_sign_promo;
820
821/* Nonzero means warn when an old-style cast is used. */
822
823extern int warn_old_style_cast;
824
825/* Nonzero means warn when non-templatized friend functions are
826 declared within a template */
827
828extern int warn_nontemplate_friend;
829
830/* Nonzero means complain about deprecated features. */
831
832extern int warn_deprecated;
833
834/* Maximum template instantiation depth. This limit is rather
835 arbitrary, but it exists to limit the time it takes to notice
836 infinite template instantiations. */
837
838extern int max_tinst_depth;
839
840/* Nonzero means the expression being parsed will never be evaluated.
841 This is a count, since unevaluated expressions can nest. */
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853#define C_TYPE_FUNCTION_P(type) \
854 (TREE_CODE (type) == FUNCTION_TYPE)
855
856/* For convenience we define a single macro to identify the class of
857 object or incomplete types. */
858#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
859 (!C_TYPE_FUNCTION_P (type))
860
861/* Record in each node resulting from a binary operator
862 what operator was specified for it. */
863#define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
864
865/* Attribute table common to the C front ends. */
866extern const struct attribute_spec c_common_attribute_table[];
867extern const struct attribute_spec c_common_format_attribute_table[];
868
869/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
870 ID is the identifier to use, NAME is the string.
871 TYPE_DEP indicates whether it depends on type of the function or not
872 (i.e. __PRETTY_FUNCTION__). */
873
874extern tree (*make_fname_decl) (tree, int);
875
876extern tree identifier_global_value (tree);
877extern void record_builtin_type (enum rid, const char *, tree);
878extern tree build_void_list_node (void);
879extern void start_fname_decls (void);
880extern void finish_fname_decls (void);
881extern const char *fname_as_string (int);
882extern tree fname_decl (unsigned, tree);
883
884extern void check_function_arguments (tree, tree);
885extern void check_function_arguments_recurse (void (*)
886 (void *, tree,
887 unsigned HOST_WIDE_INT),
888 void *, tree,
889 unsigned HOST_WIDE_INT);
890extern void check_function_format (int *, tree, tree);
891extern void set_Wformat (int);
892extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
893extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
894extern int c_common_handle_option (size_t code, const char *arg, int value);
895extern bool c_common_missing_argument (const char *opt, size_t code);
896extern tree c_common_type_for_mode (enum machine_mode, int);
897extern tree c_common_type_for_size (unsigned int, int);
898extern tree c_common_unsigned_type (tree);
899extern tree c_common_signed_type (tree);
900extern tree c_common_signed_or_unsigned_type (int, tree);
901extern tree c_common_truthvalue_conversion (tree);
902extern void c_apply_type_quals_to_decl (int, tree);
903extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
904extern tree c_alignof_expr (tree);
905/* Print an error message for invalid operands to arith operation CODE.
906 NOP_EXPR is used as a special case (see truthvalue_conversion). */
907extern void binary_op_error (enum tree_code);
908#define my_friendly_assert(EXP, N) (void) \
909 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
910
911extern tree c_expand_expr_stmt (tree);
912extern void c_expand_start_cond (tree, int, tree);
913extern void c_finish_then (void);
914extern void c_expand_start_else (void);
915extern void c_finish_else (void);
916extern void c_expand_end_cond (void);
917/* Validate the expression after `case' and apply default promotions. */
918extern tree check_case_value (tree);
919extern tree fix_string_type (tree);
920struct varray_head_tag;
921extern void constant_expression_warning (tree);
922extern tree convert_and_check (tree, tree);
923extern void overflow_warning (tree);
924extern void unsigned_conversion_warning (tree, tree);
925
926/* Read the rest of the current #-directive line. */
927extern char *get_directive_line (void);
928#define GET_DIRECTIVE_LINE() get_directive_line ()
929#define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
930#define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
931
932/* Subroutine of build_binary_op, used for comparison operations.
933 See if the operands have both been converted from subword integer types
934 and, if so, perhaps change them both back to their original type. */
935extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
936
937extern tree pointer_int_sum (enum tree_code, tree, tree);
938extern unsigned int min_precision (tree, int);
939
940/* Add qualifiers to a type, in the fashion for C. */
941extern tree c_build_qualified_type (tree, int);
942
943/* Build tree nodes and builtin functions common to both C and C++ language
944 frontends. */
945extern void c_common_nodes_and_builtins (void);
946
947extern void disable_builtin_function (const char *);
948
949extern tree build_va_arg (tree, tree);
950
951extern unsigned int c_common_init_options (unsigned int, const char **);
952extern bool c_common_post_options (const char **);
953extern bool c_common_init (void);
954extern void c_common_finish (void);
955extern void c_common_parse_file (int);
956extern HOST_WIDE_INT c_common_get_alias_set (tree);
957extern void c_register_builtin_type (tree, const char*);
958extern bool c_promoting_integer_type_p (tree);
959extern int self_promoting_args_p (tree);
960extern tree strip_array_types (tree);
961extern tree strip_pointer_operator (tree);
962
963/* This function resets the parsers' state in preparation for parsing
964 a new file. */
965extern void c_reset_state (void);
966/* This is the basic parsing function. */
967extern void c_parse_file (void);
968/* This is misnamed, it actually performs end-of-compilation processing. */
969extern void finish_file (void);
970
971/* These macros provide convenient access to the various _STMT nodes. */
972
973/* Nonzero if this statement should be considered a full-expression,
974 i.e., if temporaries created during this statement should have
975 their destructors run at the end of this statement. (In C, this
976 will always be false, since there are no destructors.) */
977#define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
978
979/* IF_STMT accessors. These give access to the condition of the if
980 statement, the then block of the if statement, and the else block
981 of the if statement if it exists. */
982#define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
983#define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
984#define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
985
986/* WHILE_STMT accessors. These give access to the condition of the
987 while statement and the body of the while statement, respectively. */
988#define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
989#define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
990
991/* DO_STMT accessors. These give access to the condition of the do
992 statement and the body of the do statement, respectively. */
993#define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
994#define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
995
996/* RETURN_STMT accessors. These give the expression associated with a
997 return statement, and whether it should be ignored when expanding
998 (as opposed to inlining). */
999#define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
1000
1001/* EXPR_STMT accessor. This gives the expression associated with an
1002 expression statement. */
1003#define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
1004
1005/* FOR_STMT accessors. These give access to the init statement,
1006 condition, update expression, and body of the for statement,
1007 respectively. */
1008#define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
1009#define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1010#define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1011#define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1012
1013/* SWITCH_STMT accessors. These give access to the condition, body and
1014 original condition type (before any compiler conversions)
1015 of the switch statement, respectively. */
1016#define SWITCH_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1017#define SWITCH_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1018#define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1019
1020/* CASE_LABEL accessors. These give access to the high and low values
1021 of a case label, respectively. */
1022#define CASE_LOW(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1023#define CASE_HIGH(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1024#define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1025
1026/* GOTO_STMT accessor. This gives access to the label associated with
1027 a goto statement. */
1028#define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1029/* True for goto created artificially by the compiler. */
1030#define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1031
1032/* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1033 statements associated with a compound statement. The result is the
1034 first statement in the list. Succeeding nodes can be accessed by
1035 calling TREE_CHAIN on a node in the list. */
1036#define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1037
1038/* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1039 instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1040 ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1041 statement. */
1042#define ASM_CV_QUAL(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1043#define ASM_STRING(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1044#define ASM_OUTPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1045#define ASM_INPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1046#define ASM_CLOBBERS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1047
1048/* DECL_STMT accessor. This gives access to the DECL associated with
1049 the given declaration statement. */
1050#define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1051
1052/* STMT_EXPR accessor. */
1053#define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1054
1055/* Nonzero if this statement-expression does not have an associated scope. */
1056#define STMT_EXPR_NO_SCOPE(NODE) \
1057 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1058
1059/* Nonzero if this statement-expression should cause warning if its result
1060 is not used. */
1061#define STMT_EXPR_WARN_UNUSED_RESULT(NODE) \
1062 TREE_LANG_FLAG_3 (STMT_EXPR_CHECK (NODE))
1063
1064/* LABEL_STMT accessor. This gives access to the label associated with
1065 the given label statement. */
1066#define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1067
1068/* COMPOUND_LITERAL_EXPR accessors. */
1069#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
1070 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1071#define COMPOUND_LITERAL_EXPR_DECL(NODE) \
1072 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1073
1074/* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
1075#define SCOPE_BEGIN_P(NODE) \
1076 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1077
1078/* Nonzero if this SCOPE_STMT is for the end of a scope. */
1079#define SCOPE_END_P(NODE) \
1080 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1081
1082/* The BLOCK containing the declarations contained in this scope. */
1083#define SCOPE_STMT_BLOCK(NODE) \
1084 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1085
1086/* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
1087#define SCOPE_NULLIFIED_P(NODE) \
1088 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1089
1090/* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1091 which should be treated as non-existent from the point of view of
1092 running cleanup actions. */
1093#define SCOPE_NO_CLEANUPS_P(NODE) \
1094 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1095
1096/* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1097 For example, in:
1098
1099 S s;
1100 l:
1101 S s2;
1102 goto l;
1103
1104 there is (implicitly) a new scope after `l', even though there are
1105 no curly braces. In particular, when we hit the goto, we must
1106 destroy s2 and then re-construct it. For the implicit scope,
1107 SCOPE_PARTIAL_P will be set. */
1108#define SCOPE_PARTIAL_P(NODE) \
1109 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1110
1111/* Nonzero for an ASM_STMT if the assembly statement is volatile. */
1112#define ASM_VOLATILE_P(NODE) \
1113 (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1114
1115/* The VAR_DECL to clean up in a CLEANUP_STMT. */
1116#define CLEANUP_DECL(NODE) \
1117 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1118/* The cleanup to run in a CLEANUP_STMT. */
1119#define CLEANUP_EXPR(NODE) \
1120 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1121
1122/* The filename we are changing to as of this FILE_STMT. */
1123#define FILE_STMT_FILENAME_NODE(NODE) \
1124 (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1125#define FILE_STMT_FILENAME(NODE) \
1126 (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1127
1128/* The line-number at which a statement began. But if
1129 STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1130 line number for the end of the current function instead. */
1131#define STMT_LINENO(NODE) \
1132 (TREE_COMPLEXITY ((NODE)))
1133
1134/* If nonzero, the STMT_LINENO for NODE is the line at which the
1135 function ended. */
1136#define STMT_LINENO_FOR_FN_P(NODE) \
1137 (TREE_LANG_FLAG_2 ((NODE)))
1138
1139/* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1140 initialization variables. */
1141#define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1142
1143/* Nonzero if we want to create an ASM_INPUT instead of an
1144 ASM_OPERAND with no operands. */
1145#define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1146
1147#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1148
1149enum c_tree_code {
1150 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1151#include "c-common.def"
1152 LAST_C_TREE_CODE
1153};
1154
1155#undef DEFTREECODE
1156
1157#define c_common_stmt_codes \
1158 CLEANUP_STMT, EXPR_STMT, COMPOUND_STMT, \
1159 DECL_STMT, IF_STMT, FOR_STMT, \
1160 WHILE_STMT, DO_STMT, RETURN_STMT, \
1161 BREAK_STMT, CONTINUE_STMT, SCOPE_STMT, \
1162 SWITCH_STMT, GOTO_STMT, LABEL_STMT, \
1163 ASM_STMT, FILE_STMT, CASE_LABEL
1164
1165/* TRUE if a code represents a statement. The front end init
1166 langhook should take care of initialization of this array. */
1167extern bool statement_code_p[MAX_TREE_CODES];
1168
1169#define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1170
1171#define INIT_STATEMENT_CODES(STMT_CODES) \
1172 do { \
1173 unsigned int i; \
1174 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
1175 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
1176 statement_code_p[STMT_CODES[i]] = true; \
1177 } while (0)
1178
1179extern void genrtl_do_pushlevel (void);
1180extern void genrtl_goto_stmt (tree);
1181extern void genrtl_expr_stmt (tree);
1182extern void genrtl_expr_stmt_value (tree, int, int);
1183extern void genrtl_decl_stmt (tree);
1184extern void genrtl_if_stmt (tree);
1185extern void genrtl_while_stmt (tree);
1186extern void genrtl_do_stmt (tree);
1187extern void genrtl_return_stmt (tree);
1188extern void genrtl_for_stmt (tree);
1189extern void genrtl_break_stmt (void);
1190extern void genrtl_continue_stmt (void);
1191extern void genrtl_scope_stmt (tree);
1192extern void genrtl_switch_stmt (tree);
1193extern void genrtl_case_label (tree);
1194extern void genrtl_compound_stmt (tree);
1195extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1196extern void genrtl_cleanup_stmt (tree);
1197extern int stmts_are_full_exprs_p (void);
1198extern int anon_aggr_type_p (tree);
1199
1200/* For a VAR_DECL that is an anonymous union, these are the various
1201 sub-variables that make up the anonymous union. */
1202#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1203
1204/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1205#define DECL_C_BIT_FIELD(NODE) \
1206 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1207#define SET_DECL_C_BIT_FIELD(NODE) \
1208 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1209#define CLEAR_DECL_C_BIT_FIELD(NODE) \
1210 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1211
1212/* In a VAR_DECL, nonzero if the decl is a register variable with
1213 an explicit asm specification. */
1214#define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1215
1216extern void emit_local_var (tree);
1217extern void make_rtl_for_local_static (tree);
1218extern tree expand_cond (tree);
1219extern tree c_expand_return (tree);
1220extern tree do_case (tree, tree);
1221extern tree build_stmt (enum tree_code, ...);
1222extern tree build_case_label (tree, tree, tree);
1223extern tree build_continue_stmt (void);
1224extern tree build_break_stmt (void);
1225extern tree build_return_stmt (tree);
1226
1227#define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
1228
1229/* Used by the C++ frontend to mark the block around the member
1230 initializers and cleanups. */
1231#define COMPOUND_STMT_BODY_BLOCK(NODE) TREE_LANG_FLAG_3 (NODE)
1232
1233extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1234
1235/* These functions must be defined by each front-end which implements
1236 a variant of the C language. They are used in c-common.c. */
1237
1238extern tree build_unary_op (enum tree_code, tree, int);
1239extern tree build_binary_op (enum tree_code, tree, tree, int);
1240extern int lvalue_p (tree);
1241extern tree default_conversion (tree);
1242
1243/* Given two integer or real types, return the type for their sum.
1244 Given two compatible ANSI C types, returns the merged type. */
1245
1246extern tree common_type (tree, tree);
1247
1248extern tree expand_tree_builtin (tree, tree, tree);
1249
1250extern tree decl_constant_value (tree);
1251
1252/* Handle increment and decrement of boolean types. */
1253extern tree boolean_increment (enum tree_code, tree);
1254
1255/* Hook currently used only by the C++ front end to reset internal state
1256 after entering or leaving a header file. */
1257extern void extract_interface_info (void);
1258
1259extern int case_compare (splay_tree_key, splay_tree_key);
1260
1261extern tree c_add_case_label (splay_tree, tree, tree, tree);
1262
1263extern tree build_function_call (tree, tree);
1264
1265extern tree finish_label_address_expr (tree);
1266
1267/* Same function prototype, but the C and C++ front ends have
1268 different implementations. Used in c-common.c. */
1269extern tree lookup_label (tree);
1270
1271extern int vector_types_convertible_p (tree t1, tree t2);
1272
1273extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1274
1275extern int c_safe_from_p (rtx, tree);
1276
1277extern int c_staticp (tree);
1278
1279extern int c_common_unsafe_for_reeval (tree);
1280
1281extern void init_c_lex (void);
1282
1283extern void c_cpp_builtins (cpp_reader *);
1284
1285/* Positive if an implicit `extern "C"' scope has just been entered;
1286 negative if such a scope has just been exited. */
1287extern int pending_lang_change;
1288
1289/* Information recorded about each file examined during compilation. */
1290
1291struct c_fileinfo
1292{
1293 int time; /* Time spent in the file. */
1294 short interface_only; /* Flags - used only by C++ */
1295 short interface_unknown;
1296};
1297
1298struct c_fileinfo *get_fileinfo (const char *);
1299extern void dump_time_statistics (void);
1300
1301extern bool c_dump_tree (void *, tree);
1302
1303extern void pch_init (void);
1304extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1305extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1306 const char *orig);
1307extern void c_common_write_pch (void);
1308extern void c_common_no_more_pch (void);
1309extern void builtin_define_with_value (const char *, const char *, int);
1310extern void c_stddef_cpp_builtins (void);
1311extern void fe_file_change (const struct line_map *);
1312extern int c_estimate_num_insns (tree decl);
1313extern bool c_decl_uninit (tree t);
1314extern void c_parse_error (const char *, enum cpp_ttype, tree);
1315
1316/* The following have been moved here from c-tree.h, since they're needed
1317 in the ObjC++ world, too. What is more, stub-objc.c could use a few
1318 prototypes. */
1319extern tree lookup_interface (tree);
1320extern tree is_class_name (tree);
1321extern tree objc_is_object_ptr (tree);
1322extern void objc_check_decl (tree);
1323extern int objc_comptypes (tree, tree, int);
1324extern tree objc_message_selector (void);
1325extern tree lookup_objc_ivar (tree);
1326extern void *get_current_scope (void);
1327extern void objc_mark_locals_volatile (void *);
1328
1329/* In c-ppoutput.c */
1330extern void init_pp_output (FILE *);
1331extern void preprocess_file (cpp_reader *);
1332extern void pp_file_change (const struct line_map *);
1333extern void pp_dir_change (cpp_reader *, const char *);
1334
1335#endif /* ! GCC_C_COMMON_H */
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
--- 19 unchanged lines hidden (view full) ---
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,
--- 13 unchanged lines hidden (view full) ---
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(())
--- 20 unchanged lines hidden (view full) ---
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
--- 10 unchanged lines hidden (view full) ---
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
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. */
--- 12 unchanged lines hidden (view full) ---
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
--- 31 unchanged lines hidden (view full) ---
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 do not warn that K&R style main() is not a function prototype. */
454extern int flag_bsd_no_warn_kr_main;
455
456/* Nonzero means warn about sizeof(function) or addition/subtraction
457 of function pointers. */
458
459extern int warn_pointer_arith;
460
461/* Nonzero means warn for any global function def
462 without separate previous prototype decl. */
463
464extern int warn_missing_prototypes;
465
466/* Warn if adding () is suggested. */
467
468extern int warn_parentheses;
469
470/* Warn if initializer is not completely bracketed. */
471
472extern int warn_missing_braces;
473
474/* Warn about comparison of signed and unsigned values.
475 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
476
477extern int warn_sign_compare;
478
479/* Nonzero means warn about usage of long long when `-pedantic'. */
480
481extern int warn_long_long;
482
483/* Nonzero means warn about deprecated conversion from string constant to
484 `char *'. */
485
486extern int warn_write_strings;
487
488/* Nonzero means warn about multiple (redundant) decls for the same single
489 variable or function. */
490
491extern int warn_redundant_decls;
492
493/* Warn about testing equality of floating point numbers. */
494
495extern int warn_float_equal;
496
497/* Warn about a subscript that has type char. */
498
499extern int warn_char_subscripts;
500
501/* Warn if a type conversion is done that might have confusing results. */
502
503extern int warn_conversion;
504
505/* Warn about #pragma directives that are not recognized. */
506
507extern int warn_unknown_pragmas; /* Tri state variable. */
508
509/* Warn about format/argument anomalies in calls to formatted I/O functions
510 (*printf, *scanf, strftime, strfmon, etc.). */
511
512extern int warn_format;
513
514/* Warn about Y2K problems with strftime formats. */
515
516extern int warn_format_y2k;
517
518/* Warn about excess arguments to formats. */
519
520extern int warn_format_extra_args;
521
522/* Warn about zero-length formats. */
523
524extern int warn_format_zero_length;
525
526/* Warn about non-literal format arguments. */
527
528extern int warn_format_nonliteral;
529
530/* Warn about possible security problems with calls to format functions. */
531
532extern int warn_format_security;
533
534
535/* C/ObjC language option variables. */
536
537
538/* Nonzero means message about use of implicit function declarations;
539 1 means warning; 2 means error. */
540
541extern int mesg_implicit_function_declaration;
542
543/* Nonzero means allow type mismatches in conditional expressions;
544 just make their values `void'. */
545
546extern int flag_cond_mismatch;
547
548/* Nonzero means enable C89 Amendment 1 features. */
549
550extern int flag_isoc94;
551
552/* Nonzero means use the ISO C99 dialect of C. */
553
554extern int flag_isoc99;
555
556/* Nonzero means allow the BSD kernel printf enhancments. */
557
558extern int flag_bsd_format;
559
560/* Nonzero means that we have builtin functions, and main is an int. */
561
562extern int flag_hosted;
563
564/* Nonzero means warn when casting a function call to a type that does
565 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
566 when there is no previous declaration of sqrt or malloc. */
567
568extern int warn_bad_function_cast;
569
570/* Warn about traditional constructs whose meanings changed in ANSI C. */
571
572extern int warn_traditional;
573
574/* Nonzero means warn for a declaration found after a statement. */
575
576extern int warn_declaration_after_statement;
577
578/* Nonzero means warn for non-prototype function decls
579 or non-prototyped defs without previous prototype. */
580
581extern int warn_strict_prototypes;
582
583/* Nonzero means warn for any global function def
584 without separate previous decl. */
585
586extern int warn_missing_declarations;
587
588/* Nonzero means warn about extern declarations of objects not at
589 file-scope level and about *all* declarations of functions (whether
590 extern or static) not at file-scope level. Note that we exclude
591 implicit function declarations. To get warnings about those, use
592 -Wimplicit. */
593
594extern int warn_nested_externs;
595
596/* Warn if main is suspicious. */
597
598extern int warn_main;
599
600/* Nonzero means warn about possible violations of sequence point rules. */
601
602extern int warn_sequence_point;
603
604/* Nonzero means warn about uninitialized variable when it is initialized with itself.
605 For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
606
607extern int warn_init_self;
608
609
610/* Nonzero means to warn about compile-time division by zero. */
611extern int warn_div_by_zero;
612
613/* Nonzero means warn about use of implicit int. */
614
615extern int warn_implicit_int;
616
617/* Warn about NULL being passed to argument slots marked as requiring
618 non-NULL. */
619
620extern int warn_nonnull;
621
622/* Warn about old-style parameter declaration. */
623
624extern int warn_old_style_definition;
625
626
627/* ObjC language option variables. */
628
629
630/* Open and close the file for outputting class declarations, if
631 requested (ObjC). */
632
633extern int flag_gen_declaration;
634
635/* Generate code for GNU or NeXT runtime environment. */
636
637extern int flag_next_runtime;
638
639/* Tells the compiler that this is a special run. Do not perform any
640 compiling, instead we are to test some platform dependent features
641 and output a C header file with appropriate definitions. */
642
643extern int print_struct_values;
644
645/* ???. Undocumented. */
646
647extern const char *constant_string_class_name;
648
649/* Warn if multiple methods are seen for the same selector, but with
650 different argument types. Performs the check on the whole selector
651 table at the end of compilation. */
652
653extern int warn_selector;
654
655/* Warn if a @selector() is found, and no method with that selector
656 has been previously declared. The check is done on each
657 @selector() as soon as it is found - so it warns about forward
658 declarations. */
659
660extern int warn_undeclared_selector;
661
662/* Warn if methods required by a protocol are not implemented in the
663 class adopting it. When turned off, methods inherited to that
664 class are also considered implemented. */
665
666extern int warn_protocol;
667
668
669/* C++ language option variables. */
670
671
672/* Nonzero means don't recognize any extension keywords. */
673
674extern int flag_no_gnu_keywords;
675
676/* Nonzero means do emit exported implementations of functions even if
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750
751extern int flag_working_directory;
752
753/* Nonzero to use __cxa_atexit, rather than atexit, to register
754 destructors for local statics and global objects. */
755
756extern int flag_use_cxa_atexit;
757
758/* Nonzero means make the default pedwarns warnings instead of errors.
759 The value of this flag is ignored if -pedantic is specified. */
760
761extern int flag_permissive;
762
763/* Nonzero means to implement standard semantics for exception
764 specifications, calling unexpected if an exception is thrown that
765 doesn't match the specification. Zero means to treat them as
766 assertions and optimize accordingly, but not check them. */
767
768extern int flag_enforce_eh_specs;
769
770/* Nonzero means warn about things that will change when compiling
771 with an ABI-compliant compiler. */
772
773extern int warn_abi;
774
775/* Nonzero means warn about invalid uses of offsetof. */
776
777extern int warn_invalid_offsetof;
778
779/* Nonzero means warn about implicit declarations. */
780
781extern int warn_implicit;
782
783/* Nonzero means warn when all ctors or dtors are private, and the class
784 has no friends. */
785
786extern int warn_ctor_dtor_privacy;
787
788/* Nonzero means warn in function declared in derived class has the
789 same name as a virtual in the base class, but fails to match the
790 type signature of any virtual function in the base class. */
791
792extern int warn_overloaded_virtual;
793
794/* Nonzero means warn when declaring a class that has a non virtual
795 destructor, when it really ought to have a virtual one. */
796
797extern int warn_nonvdtor;
798
799/* Nonzero means warn when the compiler will reorder code. */
800
801extern int warn_reorder;
802
803/* Nonzero means warn when synthesis behavior differs from Cfront's. */
804
805extern int warn_synth;
806
807/* Nonzero means warn when we convert a pointer to member function
808 into a pointer to (void or function). */
809
810extern int warn_pmf2ptr;
811
812/* Nonzero means warn about violation of some Effective C++ style rules. */
813
814extern int warn_ecpp;
815
816/* Nonzero means warn where overload resolution chooses a promotion from
817 unsigned to signed over a conversion to an unsigned of the same size. */
818
819extern int warn_sign_promo;
820
821/* Nonzero means warn when an old-style cast is used. */
822
823extern int warn_old_style_cast;
824
825/* Nonzero means warn when non-templatized friend functions are
826 declared within a template */
827
828extern int warn_nontemplate_friend;
829
830/* Nonzero means complain about deprecated features. */
831
832extern int warn_deprecated;
833
834/* Maximum template instantiation depth. This limit is rather
835 arbitrary, but it exists to limit the time it takes to notice
836 infinite template instantiations. */
837
838extern int max_tinst_depth;
839
840/* Nonzero means the expression being parsed will never be evaluated.
841 This is a count, since unevaluated expressions can nest. */
--- 11 unchanged lines hidden (view full) ---
853#define C_TYPE_FUNCTION_P(type) \
854 (TREE_CODE (type) == FUNCTION_TYPE)
855
856/* For convenience we define a single macro to identify the class of
857 object or incomplete types. */
858#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
859 (!C_TYPE_FUNCTION_P (type))
860
861/* Record in each node resulting from a binary operator
862 what operator was specified for it. */
863#define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
864
865/* Attribute table common to the C front ends. */
866extern const struct attribute_spec c_common_attribute_table[];
867extern const struct attribute_spec c_common_format_attribute_table[];
868
869/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
870 ID is the identifier to use, NAME is the string.
871 TYPE_DEP indicates whether it depends on type of the function or not
872 (i.e. __PRETTY_FUNCTION__). */
873
874extern tree (*make_fname_decl) (tree, int);
875
876extern tree identifier_global_value (tree);
877extern void record_builtin_type (enum rid, const char *, tree);
878extern tree build_void_list_node (void);
879extern void start_fname_decls (void);
880extern void finish_fname_decls (void);
881extern const char *fname_as_string (int);
882extern tree fname_decl (unsigned, tree);
883
884extern void check_function_arguments (tree, tree);
885extern void check_function_arguments_recurse (void (*)
886 (void *, tree,
887 unsigned HOST_WIDE_INT),
888 void *, tree,
889 unsigned HOST_WIDE_INT);
890extern void check_function_format (int *, tree, tree);
891extern void set_Wformat (int);
892extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
893extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
894extern int c_common_handle_option (size_t code, const char *arg, int value);
895extern bool c_common_missing_argument (const char *opt, size_t code);
896extern tree c_common_type_for_mode (enum machine_mode, int);
897extern tree c_common_type_for_size (unsigned int, int);
898extern tree c_common_unsigned_type (tree);
899extern tree c_common_signed_type (tree);
900extern tree c_common_signed_or_unsigned_type (int, tree);
901extern tree c_common_truthvalue_conversion (tree);
902extern void c_apply_type_quals_to_decl (int, tree);
903extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
904extern tree c_alignof_expr (tree);
905/* Print an error message for invalid operands to arith operation CODE.
906 NOP_EXPR is used as a special case (see truthvalue_conversion). */
907extern void binary_op_error (enum tree_code);
908#define my_friendly_assert(EXP, N) (void) \
909 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
910
911extern tree c_expand_expr_stmt (tree);
912extern void c_expand_start_cond (tree, int, tree);
913extern void c_finish_then (void);
914extern void c_expand_start_else (void);
915extern void c_finish_else (void);
916extern void c_expand_end_cond (void);
917/* Validate the expression after `case' and apply default promotions. */
918extern tree check_case_value (tree);
919extern tree fix_string_type (tree);
920struct varray_head_tag;
921extern void constant_expression_warning (tree);
922extern tree convert_and_check (tree, tree);
923extern void overflow_warning (tree);
924extern void unsigned_conversion_warning (tree, tree);
925
926/* Read the rest of the current #-directive line. */
927extern char *get_directive_line (void);
928#define GET_DIRECTIVE_LINE() get_directive_line ()
929#define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
930#define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
931
932/* Subroutine of build_binary_op, used for comparison operations.
933 See if the operands have both been converted from subword integer types
934 and, if so, perhaps change them both back to their original type. */
935extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
936
937extern tree pointer_int_sum (enum tree_code, tree, tree);
938extern unsigned int min_precision (tree, int);
939
940/* Add qualifiers to a type, in the fashion for C. */
941extern tree c_build_qualified_type (tree, int);
942
943/* Build tree nodes and builtin functions common to both C and C++ language
944 frontends. */
945extern void c_common_nodes_and_builtins (void);
946
947extern void disable_builtin_function (const char *);
948
949extern tree build_va_arg (tree, tree);
950
951extern unsigned int c_common_init_options (unsigned int, const char **);
952extern bool c_common_post_options (const char **);
953extern bool c_common_init (void);
954extern void c_common_finish (void);
955extern void c_common_parse_file (int);
956extern HOST_WIDE_INT c_common_get_alias_set (tree);
957extern void c_register_builtin_type (tree, const char*);
958extern bool c_promoting_integer_type_p (tree);
959extern int self_promoting_args_p (tree);
960extern tree strip_array_types (tree);
961extern tree strip_pointer_operator (tree);
962
963/* This function resets the parsers' state in preparation for parsing
964 a new file. */
965extern void c_reset_state (void);
966/* This is the basic parsing function. */
967extern void c_parse_file (void);
968/* This is misnamed, it actually performs end-of-compilation processing. */
969extern void finish_file (void);
970
971/* These macros provide convenient access to the various _STMT nodes. */
972
973/* Nonzero if this statement should be considered a full-expression,
974 i.e., if temporaries created during this statement should have
975 their destructors run at the end of this statement. (In C, this
976 will always be false, since there are no destructors.) */
977#define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
978
979/* IF_STMT accessors. These give access to the condition of the if
980 statement, the then block of the if statement, and the else block
981 of the if statement if it exists. */
982#define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
983#define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
984#define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
985
986/* WHILE_STMT accessors. These give access to the condition of the
987 while statement and the body of the while statement, respectively. */
988#define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
989#define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
990
991/* DO_STMT accessors. These give access to the condition of the do
992 statement and the body of the do statement, respectively. */
993#define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
994#define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
995
996/* RETURN_STMT accessors. These give the expression associated with a
997 return statement, and whether it should be ignored when expanding
998 (as opposed to inlining). */
999#define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
1000
1001/* EXPR_STMT accessor. This gives the expression associated with an
1002 expression statement. */
1003#define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
1004
1005/* FOR_STMT accessors. These give access to the init statement,
1006 condition, update expression, and body of the for statement,
1007 respectively. */
1008#define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
1009#define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1010#define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1011#define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1012
1013/* SWITCH_STMT accessors. These give access to the condition, body and
1014 original condition type (before any compiler conversions)
1015 of the switch statement, respectively. */
1016#define SWITCH_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1017#define SWITCH_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1018#define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1019
1020/* CASE_LABEL accessors. These give access to the high and low values
1021 of a case label, respectively. */
1022#define CASE_LOW(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1023#define CASE_HIGH(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1024#define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1025
1026/* GOTO_STMT accessor. This gives access to the label associated with
1027 a goto statement. */
1028#define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1029/* True for goto created artificially by the compiler. */
1030#define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1031
1032/* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1033 statements associated with a compound statement. The result is the
1034 first statement in the list. Succeeding nodes can be accessed by
1035 calling TREE_CHAIN on a node in the list. */
1036#define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1037
1038/* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1039 instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1040 ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1041 statement. */
1042#define ASM_CV_QUAL(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1043#define ASM_STRING(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1044#define ASM_OUTPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1045#define ASM_INPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1046#define ASM_CLOBBERS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1047
1048/* DECL_STMT accessor. This gives access to the DECL associated with
1049 the given declaration statement. */
1050#define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1051
1052/* STMT_EXPR accessor. */
1053#define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1054
1055/* Nonzero if this statement-expression does not have an associated scope. */
1056#define STMT_EXPR_NO_SCOPE(NODE) \
1057 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1058
1059/* Nonzero if this statement-expression should cause warning if its result
1060 is not used. */
1061#define STMT_EXPR_WARN_UNUSED_RESULT(NODE) \
1062 TREE_LANG_FLAG_3 (STMT_EXPR_CHECK (NODE))
1063
1064/* LABEL_STMT accessor. This gives access to the label associated with
1065 the given label statement. */
1066#define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1067
1068/* COMPOUND_LITERAL_EXPR accessors. */
1069#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
1070 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1071#define COMPOUND_LITERAL_EXPR_DECL(NODE) \
1072 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1073
1074/* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
1075#define SCOPE_BEGIN_P(NODE) \
1076 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1077
1078/* Nonzero if this SCOPE_STMT is for the end of a scope. */
1079#define SCOPE_END_P(NODE) \
1080 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1081
1082/* The BLOCK containing the declarations contained in this scope. */
1083#define SCOPE_STMT_BLOCK(NODE) \
1084 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1085
1086/* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
1087#define SCOPE_NULLIFIED_P(NODE) \
1088 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1089
1090/* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1091 which should be treated as non-existent from the point of view of
1092 running cleanup actions. */
1093#define SCOPE_NO_CLEANUPS_P(NODE) \
1094 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1095
1096/* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1097 For example, in:
1098
1099 S s;
1100 l:
1101 S s2;
1102 goto l;
1103
1104 there is (implicitly) a new scope after `l', even though there are
1105 no curly braces. In particular, when we hit the goto, we must
1106 destroy s2 and then re-construct it. For the implicit scope,
1107 SCOPE_PARTIAL_P will be set. */
1108#define SCOPE_PARTIAL_P(NODE) \
1109 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1110
1111/* Nonzero for an ASM_STMT if the assembly statement is volatile. */
1112#define ASM_VOLATILE_P(NODE) \
1113 (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1114
1115/* The VAR_DECL to clean up in a CLEANUP_STMT. */
1116#define CLEANUP_DECL(NODE) \
1117 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1118/* The cleanup to run in a CLEANUP_STMT. */
1119#define CLEANUP_EXPR(NODE) \
1120 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1121
1122/* The filename we are changing to as of this FILE_STMT. */
1123#define FILE_STMT_FILENAME_NODE(NODE) \
1124 (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1125#define FILE_STMT_FILENAME(NODE) \
1126 (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1127
1128/* The line-number at which a statement began. But if
1129 STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1130 line number for the end of the current function instead. */
1131#define STMT_LINENO(NODE) \
1132 (TREE_COMPLEXITY ((NODE)))
1133
1134/* If nonzero, the STMT_LINENO for NODE is the line at which the
1135 function ended. */
1136#define STMT_LINENO_FOR_FN_P(NODE) \
1137 (TREE_LANG_FLAG_2 ((NODE)))
1138
1139/* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1140 initialization variables. */
1141#define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1142
1143/* Nonzero if we want to create an ASM_INPUT instead of an
1144 ASM_OPERAND with no operands. */
1145#define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1146
1147#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1148
1149enum c_tree_code {
1150 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1151#include "c-common.def"
1152 LAST_C_TREE_CODE
1153};
1154
1155#undef DEFTREECODE
1156
1157#define c_common_stmt_codes \
1158 CLEANUP_STMT, EXPR_STMT, COMPOUND_STMT, \
1159 DECL_STMT, IF_STMT, FOR_STMT, \
1160 WHILE_STMT, DO_STMT, RETURN_STMT, \
1161 BREAK_STMT, CONTINUE_STMT, SCOPE_STMT, \
1162 SWITCH_STMT, GOTO_STMT, LABEL_STMT, \
1163 ASM_STMT, FILE_STMT, CASE_LABEL
1164
1165/* TRUE if a code represents a statement. The front end init
1166 langhook should take care of initialization of this array. */
1167extern bool statement_code_p[MAX_TREE_CODES];
1168
1169#define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1170
1171#define INIT_STATEMENT_CODES(STMT_CODES) \
1172 do { \
1173 unsigned int i; \
1174 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
1175 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
1176 statement_code_p[STMT_CODES[i]] = true; \
1177 } while (0)
1178
1179extern void genrtl_do_pushlevel (void);
1180extern void genrtl_goto_stmt (tree);
1181extern void genrtl_expr_stmt (tree);
1182extern void genrtl_expr_stmt_value (tree, int, int);
1183extern void genrtl_decl_stmt (tree);
1184extern void genrtl_if_stmt (tree);
1185extern void genrtl_while_stmt (tree);
1186extern void genrtl_do_stmt (tree);
1187extern void genrtl_return_stmt (tree);
1188extern void genrtl_for_stmt (tree);
1189extern void genrtl_break_stmt (void);
1190extern void genrtl_continue_stmt (void);
1191extern void genrtl_scope_stmt (tree);
1192extern void genrtl_switch_stmt (tree);
1193extern void genrtl_case_label (tree);
1194extern void genrtl_compound_stmt (tree);
1195extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1196extern void genrtl_cleanup_stmt (tree);
1197extern int stmts_are_full_exprs_p (void);
1198extern int anon_aggr_type_p (tree);
1199
1200/* For a VAR_DECL that is an anonymous union, these are the various
1201 sub-variables that make up the anonymous union. */
1202#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1203
1204/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1205#define DECL_C_BIT_FIELD(NODE) \
1206 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1207#define SET_DECL_C_BIT_FIELD(NODE) \
1208 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1209#define CLEAR_DECL_C_BIT_FIELD(NODE) \
1210 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1211
1212/* In a VAR_DECL, nonzero if the decl is a register variable with
1213 an explicit asm specification. */
1214#define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1215
1216extern void emit_local_var (tree);
1217extern void make_rtl_for_local_static (tree);
1218extern tree expand_cond (tree);
1219extern tree c_expand_return (tree);
1220extern tree do_case (tree, tree);
1221extern tree build_stmt (enum tree_code, ...);
1222extern tree build_case_label (tree, tree, tree);
1223extern tree build_continue_stmt (void);
1224extern tree build_break_stmt (void);
1225extern tree build_return_stmt (tree);
1226
1227#define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
1228
1229/* Used by the C++ frontend to mark the block around the member
1230 initializers and cleanups. */
1231#define COMPOUND_STMT_BODY_BLOCK(NODE) TREE_LANG_FLAG_3 (NODE)
1232
1233extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1234
1235/* These functions must be defined by each front-end which implements
1236 a variant of the C language. They are used in c-common.c. */
1237
1238extern tree build_unary_op (enum tree_code, tree, int);
1239extern tree build_binary_op (enum tree_code, tree, tree, int);
1240extern int lvalue_p (tree);
1241extern tree default_conversion (tree);
1242
1243/* Given two integer or real types, return the type for their sum.
1244 Given two compatible ANSI C types, returns the merged type. */
1245
1246extern tree common_type (tree, tree);
1247
1248extern tree expand_tree_builtin (tree, tree, tree);
1249
1250extern tree decl_constant_value (tree);
1251
1252/* Handle increment and decrement of boolean types. */
1253extern tree boolean_increment (enum tree_code, tree);
1254
1255/* Hook currently used only by the C++ front end to reset internal state
1256 after entering or leaving a header file. */
1257extern void extract_interface_info (void);
1258
1259extern int case_compare (splay_tree_key, splay_tree_key);
1260
1261extern tree c_add_case_label (splay_tree, tree, tree, tree);
1262
1263extern tree build_function_call (tree, tree);
1264
1265extern tree finish_label_address_expr (tree);
1266
1267/* Same function prototype, but the C and C++ front ends have
1268 different implementations. Used in c-common.c. */
1269extern tree lookup_label (tree);
1270
1271extern int vector_types_convertible_p (tree t1, tree t2);
1272
1273extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1274
1275extern int c_safe_from_p (rtx, tree);
1276
1277extern int c_staticp (tree);
1278
1279extern int c_common_unsafe_for_reeval (tree);
1280
1281extern void init_c_lex (void);
1282
1283extern void c_cpp_builtins (cpp_reader *);
1284
1285/* Positive if an implicit `extern "C"' scope has just been entered;
1286 negative if such a scope has just been exited. */
1287extern int pending_lang_change;
1288
1289/* Information recorded about each file examined during compilation. */
1290
1291struct c_fileinfo
1292{
1293 int time; /* Time spent in the file. */
1294 short interface_only; /* Flags - used only by C++ */
1295 short interface_unknown;
1296};
1297
1298struct c_fileinfo *get_fileinfo (const char *);
1299extern void dump_time_statistics (void);
1300
1301extern bool c_dump_tree (void *, tree);
1302
1303extern void pch_init (void);
1304extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1305extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1306 const char *orig);
1307extern void c_common_write_pch (void);
1308extern void c_common_no_more_pch (void);
1309extern void builtin_define_with_value (const char *, const char *, int);
1310extern void c_stddef_cpp_builtins (void);
1311extern void fe_file_change (const struct line_map *);
1312extern int c_estimate_num_insns (tree decl);
1313extern bool c_decl_uninit (tree t);
1314extern void c_parse_error (const char *, enum cpp_ttype, tree);
1315
1316/* The following have been moved here from c-tree.h, since they're needed
1317 in the ObjC++ world, too. What is more, stub-objc.c could use a few
1318 prototypes. */
1319extern tree lookup_interface (tree);
1320extern tree is_class_name (tree);
1321extern tree objc_is_object_ptr (tree);
1322extern void objc_check_decl (tree);
1323extern int objc_comptypes (tree, tree, int);
1324extern tree objc_message_selector (void);
1325extern tree lookup_objc_ivar (tree);
1326extern void *get_current_scope (void);
1327extern void objc_mark_locals_volatile (void *);
1328
1329/* In c-ppoutput.c */
1330extern void init_pp_output (FILE *);
1331extern void preprocess_file (cpp_reader *);
1332extern void pp_file_change (const struct line_map *);
1333extern void pp_dir_change (cpp_reader *, const char *);
1334
1335#endif /* ! GCC_C_COMMON_H */