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.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
25 #include "splay-tree.h"
29 /* Usage of TREE_LANG_FLAG_?:
30 0: TREE_NEGATED_INT (in INTEGER_CST).
31 IDENTIFIER_MARKED (used by search routines).
32 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
33 STMT_EXPR_NO_SCOPE (in STMT_EXPR)
34 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
35 STMT_IS_FULL_EXPR_P (in _STMT)
36 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
42 /* Reserved identifiers. This is the union of all the keywords for C,
43 C++, and Objective-C. All the type modifiers have to be in one
44 block at the beginning, because they are used as mask bits. There
45 are 27 type modifiers; if we add many more we will have to redesign
46 the mask mechanism. */
51 /* C, in empirical order of frequency. */
53 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
54 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
55 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
58 RID_COMPLEX, RID_THREAD,
61 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
64 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
67 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
68 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
69 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
70 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
74 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
75 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_PTRBASE,
76 RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
78 /* Too many ways of getting the name of a function as a string */
79 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
82 RID_BOOL, RID_WCHAR, RID_CLASS,
83 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
84 RID_TEMPLATE, RID_NULL, RID_CATCH,
85 RID_DELETE, RID_FALSE, RID_NAMESPACE,
86 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
87 RID_THIS, RID_THROW, RID_TRUE,
88 RID_TRY, RID_TYPENAME, RID_TYPEID,
92 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
95 RID_ID, RID_AT_ENCODE, RID_AT_END,
96 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
97 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
98 RID_AT_PROTOCOL, RID_AT_SELECTOR,
99 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
100 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
102 RID_AT_IMPLEMENTATION,
106 RID_FIRST_MODIFIER = RID_STATIC,
107 RID_LAST_MODIFIER = RID_ONEWAY,
109 RID_FIRST_AT = RID_AT_ENCODE,
110 RID_LAST_AT = RID_AT_IMPLEMENTATION,
111 RID_FIRST_PQ = RID_IN,
112 RID_LAST_PQ = RID_ONEWAY
115 #define OBJC_IS_AT_KEYWORD(rid) \
116 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
117 (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
119 #define OBJC_IS_PQ_KEYWORD(rid) \
120 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
121 (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
123 /* The elements of `ridpointers' are identifier nodes for the reserved
124 type names and storage classes. It is indexed by a RID_... value. */
125 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
127 /* Standard named or nameless data types of the C compiler. */
132 CTI_SIGNED_WCHAR_TYPE,
133 CTI_UNSIGNED_WCHAR_TYPE,
135 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
136 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
139 CTI_WIDEST_INT_LIT_TYPE,
140 CTI_WIDEST_UINT_LIT_TYPE,
143 CTI_WCHAR_ARRAY_TYPE,
146 CTI_CONST_STRING_TYPE,
148 /* Type for boolean expressions (bool in C++, int in C). */
151 CTI_TRUTHVALUE_FALSE,
153 CTI_DEFAULT_FUNCTION_TYPE,
155 /* These are not types, but we have to look them up all the time. */
156 CTI_FUNCTION_NAME_DECL,
157 CTI_PRETTY_FUNCTION_NAME_DECL,
158 CTI_C99_FUNCTION_NAME_DECL,
159 CTI_SAVED_FUNCTION_NAME_DECLS,
166 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
168 /* Identifier part common to the C front ends. Inherits from
169 tree_identifier, despite appearances. */
170 struct c_common_identifier GTY(())
172 struct tree_common common;
173 struct cpp_hashnode node;
176 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
177 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
178 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
179 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
180 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
181 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
182 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
183 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
184 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
185 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
187 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
188 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
189 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
191 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
192 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
193 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
194 #define string_type_node c_global_trees[CTI_STRING_TYPE]
195 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
197 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
199 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
200 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
201 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
202 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
204 /* A node for `((void) 0)'. */
205 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
207 extern GTY(()) tree c_global_trees[CTI_MAX];
209 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
210 tree for size reasons. */
211 struct sorted_fields_type GTY(())
214 tree GTY((length ("%h.len"))) elts[1];
217 /* Mark which labels are explicitly declared.
218 These may be shadowed, and may be referenced from nested functions. */
219 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
221 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
222 warning if they undergo concatenation. */
223 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
225 typedef enum c_language_kind
227 clk_c = 0, /* C90, C94 or C99 */
228 clk_objc = 1, /* clk_c with ObjC features. */
229 clk_cxx = 2, /* ANSI/ISO C++ */
230 clk_objcxx = 3 /* clk_cxx with ObjC features. */
234 /* To test for a specific language use c_language, defined by each
235 front end. For "ObjC features" or "not C++" use the macros. */
236 extern c_language_kind c_language;
238 #define c_dialect_cxx() (c_language & clk_cxx)
239 #define c_dialect_objc() (c_language & clk_objc)
241 /* Information about a statement tree. */
243 struct stmt_tree_s GTY(()) {
244 /* The current statment list being collected. */
245 tree x_cur_stmt_list;
247 /* In C++, Nonzero if we should treat statements as full
248 expressions. In particular, this variable is no-zero if at the
249 end of a statement we should destroy any temporaries created
250 during that statement. Similarly, if, at the end of a block, we
251 should destroy any local variables in this block. Normally, this
252 variable is nonzero, since those are the normal semantics of
255 However, in order to represent aggregate initialization code as
256 tree structure, we use statement-expressions. The statements
257 within the statement expression should not result in cleanups
258 being run until the entire enclosing statement is complete.
260 This flag has no effect in C. */
261 int stmts_are_full_exprs_p;
264 typedef struct stmt_tree_s *stmt_tree;
266 /* Global state pertinent to the current function. Some C dialects
267 extend this structure with additional fields. */
269 struct c_language_function GTY(()) {
270 /* While we are parsing the function, this contains information
271 about the statement-tree that we are building. */
272 struct stmt_tree_s x_stmt_tree;
275 /* When building a statement-tree, this is the current statment list
276 being collected. It's TREE_CHAIN is a back-pointer to the previous
279 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
281 /* Language-specific hooks. */
283 extern void (*lang_expand_function_end) (void);
285 /* Callback that determines if it's ok for a function to have no
286 noreturn attribute. */
287 extern int (*lang_missing_noreturn_ok_p) (tree);
289 extern void push_file_scope (void);
290 extern void pop_file_scope (void);
291 extern int yyparse (void);
292 extern stmt_tree current_stmt_tree (void);
293 extern tree push_stmt_list (void);
294 extern tree re_push_stmt_list (tree);
295 extern tree pop_stmt_list (tree);
296 extern tree add_stmt (tree);
297 extern void add_decl_stmt (tree);
298 extern void push_cleanup (tree, tree, bool);
300 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
301 extern int c_expand_decl (tree);
303 extern int field_decl_cmp (const void *, const void *);
304 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
306 extern bool has_c_linkage (tree decl);
308 /* Switches common to the C front ends. */
310 /* Nonzero if prepreprocessing only. */
312 extern int flag_preprocess_only;
314 /* Zero means that faster, ...NonNil variants of objc_msgSend...
315 calls will be used in ObjC; passing nil receivers to such calls
316 will most likely result in crashes. */
317 extern int flag_nil_receivers;
319 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
320 @try, etc.) in source code. */
321 extern int flag_objc_exceptions;
323 /* Nonzero means that we generate NeXT setjmp based exceptions. */
324 extern int flag_objc_sjlj_exceptions;
326 /* Nonzero means that code generation will be altered to support
327 "zero-link" execution. This currently affects ObjC only, but may
328 affect other languages in the future. */
329 extern int flag_zero_link;
331 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
332 unit. It will inform the ObjC runtime that class definition(s) herein
333 contained are to replace one(s) previously loaded. */
334 extern int flag_replace_objc_classes;
336 /* Nonzero means don't output line number information. */
338 extern char flag_no_line_commands;
340 /* Nonzero causes -E output not to be done, but directives such as
341 #define that have side effects are still obeyed. */
343 extern char flag_no_output;
345 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
346 'N' of the command line switch. */
348 extern char flag_dump_macros;
350 /* Nonzero means pass #include lines through to the output. */
352 extern char flag_dump_includes;
354 /* The file name to which we should write a precompiled header, or
355 NULL if no header will be written in this compile. */
357 extern const char *pch_file;
359 /* Nonzero if an ISO standard was selected. It rejects macros in the
364 /* Nonzero if -undef was given. It suppresses target built-in macros
367 extern int flag_undef;
369 /* Nonzero means don't recognize the non-ANSI builtin functions. */
371 extern int flag_no_builtin;
373 /* Nonzero means don't recognize the non-ANSI builtin functions.
376 extern int flag_no_nonansi_builtin;
378 /* Nonzero means give `double' the same size as `float'. */
380 extern int flag_short_double;
382 /* Nonzero means give `wchar_t' the same size as `short'. */
384 extern int flag_short_wchar;
386 /* Nonzero means allow Microsoft extensions without warnings or errors. */
387 extern int flag_ms_extensions;
389 /* Nonzero means don't recognize the keyword `asm'. */
391 extern int flag_no_asm;
393 /* Nonzero means give string constants the type `const char *', as mandated
396 extern int flag_const_strings;
398 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
400 extern int flag_signed_bitfields;
401 extern int explicit_flag_signed_bitfields;
403 /* Nonzero means warn about pointer casts that can drop a type qualifier
404 from the pointer target type. */
406 extern int warn_cast_qual;
408 /* Warn about functions which might be candidates for format attributes. */
410 extern int warn_missing_format_attribute;
412 /* Nonzero means warn about sizeof(function) or addition/subtraction
413 of function pointers. */
415 extern int warn_pointer_arith;
417 /* Nonzero means warn for any global function def
418 without separate previous prototype decl. */
420 extern int warn_missing_prototypes;
422 /* Warn if adding () is suggested. */
424 extern int warn_parentheses;
426 /* Warn if initializer is not completely bracketed. */
428 extern int warn_missing_braces;
430 /* Warn about comparison of signed and unsigned values.
431 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
433 extern int warn_sign_compare;
435 /* Nonzero means warn about usage of long long when `-pedantic'. */
437 extern int warn_long_long;
439 /* Nonzero means warn about deprecated conversion from string constant to
442 extern int warn_write_strings;
444 /* Nonzero means warn about multiple (redundant) decls for the same single
445 variable or function. */
447 extern int warn_redundant_decls;
449 /* Warn about testing equality of floating point numbers. */
451 extern int warn_float_equal;
453 /* Warn about a subscript that has type char. */
455 extern int warn_char_subscripts;
457 /* Warn if a type conversion is done that might have confusing results. */
459 extern int warn_conversion;
461 /* Warn about #pragma directives that are not recognized. */
463 extern int warn_unknown_pragmas; /* Tri state variable. */
465 /* Warn about format/argument anomalies in calls to formatted I/O functions
466 (*printf, *scanf, strftime, strfmon, etc.). */
468 extern int warn_format;
470 /* Warn about Y2K problems with strftime formats. */
472 extern int warn_format_y2k;
474 /* Warn about excess arguments to formats. */
476 extern int warn_format_extra_args;
478 /* Warn about zero-length formats. */
480 extern int warn_format_zero_length;
482 /* Warn about non-literal format arguments. */
484 extern int warn_format_nonliteral;
486 /* Warn about possible security problems with calls to format functions. */
488 extern int warn_format_security;
491 /* C/ObjC language option variables. */
494 /* Nonzero means message about use of implicit function declarations;
495 1 means warning; 2 means error. */
497 extern int mesg_implicit_function_declaration;
499 /* Nonzero means allow type mismatches in conditional expressions;
500 just make their values `void'. */
502 extern int flag_cond_mismatch;
504 /* Nonzero means enable C89 Amendment 1 features. */
506 extern int flag_isoc94;
508 /* Nonzero means use the ISO C99 dialect of C. */
510 extern int flag_isoc99;
512 /* Nonzero means that we have builtin functions, and main is an int. */
514 extern int flag_hosted;
516 /* Nonzero means warn when casting a function call to a type that does
517 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
518 when there is no previous declaration of sqrt or malloc. */
520 extern int warn_bad_function_cast;
522 /* Warn about traditional constructs whose meanings changed in ANSI C. */
524 extern int warn_traditional;
526 /* Nonzero means warn for a declaration found after a statement. */
528 extern int warn_declaration_after_statement;
530 /* Nonzero means warn for non-prototype function decls
531 or non-prototyped defs without previous prototype. */
533 extern int warn_strict_prototypes;
535 /* Nonzero means warn for any global function def
536 without separate previous decl. */
538 extern int warn_missing_declarations;
540 /* Nonzero means warn about extern declarations of objects not at
541 file-scope level and about *all* declarations of functions (whether
542 extern or static) not at file-scope level. Note that we exclude
543 implicit function declarations. To get warnings about those, use
546 extern int warn_nested_externs;
548 /* Warn if main is suspicious. */
550 extern int warn_main;
552 /* Nonzero means warn about possible violations of sequence point rules. */
554 extern int warn_sequence_point;
556 /* Nonzero means warn about uninitialized variable when it is initialized with itself.
557 For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
559 extern int warn_init_self;
562 /* Nonzero means to warn about compile-time division by zero. */
563 extern int warn_div_by_zero;
565 /* Nonzero means warn about use of implicit int. */
567 extern int warn_implicit_int;
569 /* Warn about NULL being passed to argument slots marked as requiring
572 extern int warn_nonnull;
574 /* Warn about old-style parameter declaration. */
576 extern int warn_old_style_definition;
579 /* ObjC language option variables. */
582 /* Open and close the file for outputting class declarations, if
585 extern int flag_gen_declaration;
587 /* Generate code for GNU or NeXT runtime environment. */
589 extern int flag_next_runtime;
591 /* Tells the compiler that this is a special run. Do not perform any
592 compiling, instead we are to test some platform dependent features
593 and output a C header file with appropriate definitions. */
595 extern int print_struct_values;
597 /* ???. Undocumented. */
599 extern const char *constant_string_class_name;
601 /* Warn if multiple methods are seen for the same selector, but with
602 different argument types. Performs the check on the whole selector
603 table at the end of compilation. */
605 extern int warn_selector;
607 /* Warn if a @selector() is found, and no method with that selector
608 has been previously declared. The check is done on each
609 @selector() as soon as it is found - so it warns about forward
612 extern int warn_undeclared_selector;
614 /* Warn if methods required by a protocol are not implemented in the
615 class adopting it. When turned off, methods inherited to that
616 class are also considered implemented. */
618 extern int warn_protocol;
621 /* C++ language option variables. */
624 /* Nonzero means don't recognize any extension keywords. */
626 extern int flag_no_gnu_keywords;
628 /* Nonzero means do emit exported implementations of functions even if
629 they can be inlined. */
631 extern int flag_implement_inlines;
633 /* Nonzero means that implicit instantiations will be emitted if needed. */
635 extern int flag_implicit_templates;
637 /* Nonzero means that implicit instantiations of inline templates will be
638 emitted if needed, even if instantiations of non-inline templates
641 extern int flag_implicit_inline_templates;
643 /* Nonzero means generate separate instantiation control files and
644 juggle them at link time. */
646 extern int flag_use_repository;
648 /* Nonzero if we want to issue diagnostics that the standard says are not
651 extern int flag_optional_diags;
653 /* Nonzero means we should attempt to elide constructors when possible. */
655 extern int flag_elide_constructors;
657 /* Nonzero means that member functions defined in class scope are
658 inline by default. */
660 extern int flag_default_inline;
662 /* Controls whether compiler generates 'type descriptor' that give
663 run-time type information. */
665 extern int flag_rtti;
667 /* Nonzero if we want to conserve space in the .o files. We do this
668 by putting uninitialized data and runtime initialized data into
669 .common instead of .data at the expense of not flagging multiple
672 extern int flag_conserve_space;
674 /* Nonzero if we want to obey access control semantics. */
676 extern int flag_access_control;
678 /* Nonzero if we want to check the return value of new and avoid calling
679 constructors if it is a null pointer. */
681 extern int flag_check_new;
683 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
684 initialization variables.
685 0: Old rules, set by -fno-for-scope.
686 2: New ISO rules, set by -ffor-scope.
687 1: Try to implement new ISO rules, but with backup compatibility
688 (and warnings). This is the default, for now. */
690 extern int flag_new_for_scope;
692 /* Nonzero if we want to emit defined symbols with common-like linkage as
693 weak symbols where possible, in order to conform to C++ semantics.
694 Otherwise, emit them as local symbols. */
696 extern int flag_weak;
698 /* 0 means we want the preprocessor to not emit line directives for
699 the current working directory. 1 means we want it to do it. -1
700 means we should decide depending on whether debugging information
701 is being emitted or not. */
703 extern int flag_working_directory;
705 /* Nonzero to use __cxa_atexit, rather than atexit, to register
706 destructors for local statics and global objects. */
708 extern int flag_use_cxa_atexit;
710 /* Nonzero means make the default pedwarns warnings instead of errors.
711 The value of this flag is ignored if -pedantic is specified. */
713 extern int flag_permissive;
715 /* Nonzero means to implement standard semantics for exception
716 specifications, calling unexpected if an exception is thrown that
717 doesn't match the specification. Zero means to treat them as
718 assertions and optimize accordingly, but not check them. */
720 extern int flag_enforce_eh_specs;
722 /* Nonzero means warn about things that will change when compiling
723 with an ABI-compliant compiler. */
727 /* Nonzero means warn about invalid uses of offsetof. */
729 extern int warn_invalid_offsetof;
731 /* Nonzero means warn about implicit declarations. */
733 extern int warn_implicit;
735 /* Nonzero means warn when all ctors or dtors are private, and the class
738 extern int warn_ctor_dtor_privacy;
740 /* Nonzero means warn in function declared in derived class has the
741 same name as a virtual in the base class, but fails to match the
742 type signature of any virtual function in the base class. */
744 extern int warn_overloaded_virtual;
746 /* Nonzero means warn when declaring a class that has a non virtual
747 destructor, when it really ought to have a virtual one. */
749 extern int warn_nonvdtor;
751 /* Nonzero means warn when the compiler will reorder code. */
753 extern int warn_reorder;
755 /* Nonzero means warn when synthesis behavior differs from Cfront's. */
757 extern int warn_synth;
759 /* Nonzero means warn when we convert a pointer to member function
760 into a pointer to (void or function). */
762 extern int warn_pmf2ptr;
764 /* Nonzero means warn about violation of some Effective C++ style rules. */
766 extern int warn_ecpp;
768 /* Nonzero means warn where overload resolution chooses a promotion from
769 unsigned to signed over a conversion to an unsigned of the same size. */
771 extern int warn_sign_promo;
773 /* Nonzero means warn when an old-style cast is used. */
775 extern int warn_old_style_cast;
777 /* Nonzero means warn when non-templatized friend functions are
778 declared within a template */
780 extern int warn_nontemplate_friend;
782 /* Nonzero means complain about deprecated features. */
784 extern int warn_deprecated;
786 /* Maximum template instantiation depth. This limit is rather
787 arbitrary, but it exists to limit the time it takes to notice
788 infinite template instantiations. */
790 extern int max_tinst_depth;
792 /* Nonzero means the expression being parsed will never be evaluated.
793 This is a count, since unevaluated expressions can nest. */
795 extern int skip_evaluation;
797 /* C types are partitioned into three subsets: object, function, and
799 #define C_TYPE_OBJECT_P(type) \
800 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
802 #define C_TYPE_INCOMPLETE_P(type) \
803 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
805 #define C_TYPE_FUNCTION_P(type) \
806 (TREE_CODE (type) == FUNCTION_TYPE)
808 /* For convenience we define a single macro to identify the class of
809 object or incomplete types. */
810 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
811 (!C_TYPE_FUNCTION_P (type))
813 /* Record in each node resulting from a binary operator
814 what operator was specified for it. */
815 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
817 /* Attribute table common to the C front ends. */
818 extern const struct attribute_spec c_common_attribute_table[];
819 extern const struct attribute_spec c_common_format_attribute_table[];
821 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
822 ID is the identifier to use, NAME is the string.
823 TYPE_DEP indicates whether it depends on type of the function or not
824 (i.e. __PRETTY_FUNCTION__). */
826 extern tree (*make_fname_decl) (tree, int);
828 extern tree identifier_global_value (tree);
829 extern void record_builtin_type (enum rid, const char *, tree);
830 extern tree build_void_list_node (void);
831 extern void start_fname_decls (void);
832 extern void finish_fname_decls (void);
833 extern const char *fname_as_string (int);
834 extern tree fname_decl (unsigned, tree);
836 extern void check_function_arguments (tree, tree);
837 extern void check_function_arguments_recurse (void (*)
839 unsigned HOST_WIDE_INT),
841 unsigned HOST_WIDE_INT);
842 extern void check_function_format (int *, tree, tree);
843 extern void set_Wformat (int);
844 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
845 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
846 extern int c_common_handle_option (size_t code, const char *arg, int value);
847 extern bool c_common_missing_argument (const char *opt, size_t code);
848 extern tree c_common_type_for_mode (enum machine_mode, int);
849 extern tree c_common_type_for_size (unsigned int, int);
850 extern tree c_common_unsigned_type (tree);
851 extern tree c_common_signed_type (tree);
852 extern tree c_common_signed_or_unsigned_type (int, tree);
853 extern tree c_common_truthvalue_conversion (tree);
854 extern void c_apply_type_quals_to_decl (int, tree);
855 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
856 extern tree c_alignof_expr (tree);
857 /* Print an error message for invalid operands to arith operation CODE.
858 NOP_EXPR is used as a special case (see truthvalue_conversion). */
859 extern void binary_op_error (enum tree_code);
860 #define my_friendly_assert(EXP, N) (void) \
861 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
863 extern tree c_expand_expr_stmt (tree);
864 /* Validate the expression after `case' and apply default promotions. */
865 extern tree check_case_value (tree);
866 extern tree fix_string_type (tree);
867 struct varray_head_tag;
868 extern void constant_expression_warning (tree);
869 extern tree convert_and_check (tree, tree);
870 extern void overflow_warning (tree);
871 extern void unsigned_conversion_warning (tree, tree);
873 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
874 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
876 /* Subroutine of build_binary_op, used for comparison operations.
877 See if the operands have both been converted from subword integer types
878 and, if so, perhaps change them both back to their original type. */
879 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
881 extern tree pointer_int_sum (enum tree_code, tree, tree);
882 extern unsigned int min_precision (tree, int);
884 /* Add qualifiers to a type, in the fashion for C. */
885 extern tree c_build_qualified_type (tree, int);
887 /* Build tree nodes and builtin functions common to both C and C++ language
889 extern void c_common_nodes_and_builtins (void);
891 extern void disable_builtin_function (const char *);
893 extern tree build_va_arg (tree, tree);
895 extern unsigned int c_common_init_options (unsigned int, const char **);
896 extern bool c_common_post_options (const char **);
897 extern bool c_common_init (void);
898 extern void c_common_finish (void);
899 extern void c_common_parse_file (int);
900 extern HOST_WIDE_INT c_common_get_alias_set (tree);
901 extern void c_register_builtin_type (tree, const char*);
902 extern bool c_promoting_integer_type_p (tree);
903 extern int self_promoting_args_p (tree);
904 extern tree strip_array_types (tree);
905 extern tree strip_pointer_operator (tree);
907 /* This is the basic parsing function. */
908 extern void c_parse_file (void);
909 /* This is misnamed, it actually performs end-of-compilation processing. */
910 extern void finish_file (void);
912 /* These macros provide convenient access to the various _STMT nodes. */
914 /* Nonzero if this statement should be considered a full-expression,
915 i.e., if temporaries created during this statement should have
916 their destructors run at the end of this statement. (In C, this
917 will always be false, since there are no destructors.) */
918 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
920 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
921 if a statement expression. */
922 #define STATEMENT_LIST_STMT_EXPR(NODE) \
923 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
925 /* WHILE_STMT accessors. These give access to the condition of the
926 while statement and the body of the while statement, respectively. */
927 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
928 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
930 /* DO_STMT accessors. These give access to the condition of the do
931 statement and the body of the do statement, respectively. */
932 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
933 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
935 /* RETURN_STMT accessors. These give the expression associated with a
936 return statement, and whether it should be ignored when expanding
937 (as opposed to inlining). */
938 #define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
940 /* EXPR_STMT accessor. This gives the expression associated with an
941 expression statement. */
942 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
944 /* FOR_STMT accessors. These give access to the init statement,
945 condition, update expression, and body of the for statement,
947 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
948 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
949 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
950 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
952 #define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
954 /* DECL_STMT accessor. This gives access to the DECL associated with
955 the given declaration statement. */
956 #define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
958 /* STMT_EXPR accessor. */
959 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
961 /* Nonzero if this statement-expression does not have an associated scope. */
962 #define STMT_EXPR_NO_SCOPE(NODE) \
963 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
965 /* COMPOUND_LITERAL_EXPR accessors. */
966 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
967 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
968 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
969 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
971 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
974 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
975 #include "c-common.def"
981 #define c_common_stmt_codes \
982 EXPR_STMT, DECL_STMT, FOR_STMT, \
983 WHILE_STMT, DO_STMT, RETURN_STMT, \
984 BREAK_STMT, CONTINUE_STMT, SWITCH_STMT
986 /* TRUE if a code represents a statement. The front end init
987 langhook should take care of initialization of this array. */
988 extern bool statement_code_p[MAX_TREE_CODES];
990 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
992 #define INIT_STATEMENT_CODES(STMT_CODES) \
995 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
996 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
997 statement_code_p[STMT_CODES[i]] = true; \
1000 extern int stmts_are_full_exprs_p (void);
1001 extern int anon_aggr_type_p (tree);
1003 /* For a VAR_DECL that is an anonymous union, these are the various
1004 sub-variables that make up the anonymous union. */
1005 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1007 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1008 #define DECL_C_BIT_FIELD(NODE) \
1009 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1010 #define SET_DECL_C_BIT_FIELD(NODE) \
1011 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1012 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1013 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1015 extern void emit_local_var (tree);
1016 extern void make_rtl_for_local_static (tree);
1017 extern tree c_expand_return (tree);
1018 extern tree do_case (tree, tree);
1019 extern tree build_stmt (enum tree_code, ...);
1020 extern tree build_case_label (tree, tree, tree);
1021 extern tree build_continue_stmt (void);
1022 extern tree build_break_stmt (void);
1023 extern tree build_return_stmt (tree);
1025 extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1027 /* These functions must be defined by each front-end which implements
1028 a variant of the C language. They are used in c-common.c. */
1030 extern tree build_unary_op (enum tree_code, tree, int);
1031 extern tree build_binary_op (enum tree_code, tree, tree, int);
1032 extern int lvalue_p (tree);
1033 extern tree default_conversion (tree);
1035 /* Given two integer or real types, return the type for their sum.
1036 Given two compatible ANSI C types, returns the merged type. */
1038 extern tree common_type (tree, tree);
1040 extern tree expand_tree_builtin (tree, tree, tree);
1042 extern tree decl_constant_value (tree);
1044 /* Handle increment and decrement of boolean types. */
1045 extern tree boolean_increment (enum tree_code, tree);
1047 /* Hook currently used only by the C++ front end to reset internal state
1048 after entering or leaving a header file. */
1049 extern void extract_interface_info (void);
1051 extern int case_compare (splay_tree_key, splay_tree_key);
1053 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1055 extern void c_do_switch_warnings (splay_tree, tree);
1057 extern tree build_function_call (tree, tree);
1059 extern tree finish_label_address_expr (tree);
1061 /* Same function prototype, but the C and C++ front ends have
1062 different implementations. Used in c-common.c. */
1063 extern tree lookup_label (tree);
1065 extern int vector_types_convertible_p (tree t1, tree t2);
1067 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1069 extern int c_safe_from_p (rtx, tree);
1071 extern int c_staticp (tree);
1073 extern int c_common_unsafe_for_reeval (tree);
1075 extern void init_c_lex (void);
1077 extern void c_cpp_builtins (cpp_reader *);
1079 /* Positive if an implicit `extern "C"' scope has just been entered;
1080 negative if such a scope has just been exited. */
1081 extern GTY(()) int pending_lang_change;
1083 /* Information recorded about each file examined during compilation. */
1087 int time; /* Time spent in the file. */
1088 short interface_only; /* Flags - used only by C++ */
1089 short interface_unknown;
1092 struct c_fileinfo *get_fileinfo (const char *);
1093 extern void dump_time_statistics (void);
1095 extern bool c_dump_tree (void *, tree);
1097 extern tree c_walk_subtrees (tree*, int*, walk_tree_fn, void*, void*);
1099 extern void c_warn_unused_result (tree *);
1101 /* In c-gimplify.c */
1102 extern void c_genericize (tree);
1103 extern int c_gimplify_expr (tree *, tree *, tree *);
1104 extern tree c_build_bind_expr (tree, tree);
1106 extern void pch_init (void);
1107 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1108 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1110 extern void c_common_write_pch (void);
1111 extern void c_common_no_more_pch (void);
1112 extern void builtin_define_with_value (const char *, const char *, int);
1113 extern void c_stddef_cpp_builtins (void);
1114 extern void fe_file_change (const struct line_map *);
1115 extern void c_parse_error (const char *, enum cpp_ttype, tree);
1117 /* The following have been moved here from c-tree.h, since they're needed
1118 in the ObjC++ world, too. What is more, stub-objc.c could use a few
1120 extern tree lookup_interface (tree);
1121 extern tree is_class_name (tree);
1122 extern tree objc_is_object_ptr (tree);
1123 extern void objc_check_decl (tree);
1124 extern int objc_comptypes (tree, tree, int);
1125 extern tree objc_message_selector (void);
1126 extern tree lookup_objc_ivar (tree);
1127 extern void *get_current_scope (void);
1128 extern void objc_mark_locals_volatile (void *);
1129 extern void objc_clear_super_receiver (void);
1130 extern int objc_is_public (tree, tree);
1132 /* In c-ppoutput.c */
1133 extern void init_pp_output (FILE *);
1134 extern void preprocess_file (cpp_reader *);
1135 extern void pp_file_change (const struct line_map *);
1136 extern void pp_dir_change (cpp_reader *, const char *);
1138 #endif /* ! GCC_C_COMMON_H */