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 ASM_INPUT_P (in ASM_STMT)
34 STMT_EXPR_NO_SCOPE (in STMT_EXPR)
35 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
36 STMT_IS_FULL_EXPR_P (in _STMT)
37 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
43 /* Reserved identifiers. This is the union of all the keywords for C,
44 C++, and Objective-C. All the type modifiers have to be in one
45 block at the beginning, because they are used as mask bits. There
46 are 27 type modifiers; if we add many more we will have to redesign
47 the mask mechanism. */
52 /* C, in empirical order of frequency. */
54 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
55 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
56 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
59 RID_COMPLEX, RID_THREAD,
62 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
65 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
68 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
69 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
70 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
71 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
75 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
76 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_PTRBASE,
77 RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
79 /* Too many ways of getting the name of a function as a string */
80 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
83 RID_BOOL, RID_WCHAR, RID_CLASS,
84 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
85 RID_TEMPLATE, RID_NULL, RID_CATCH,
86 RID_DELETE, RID_FALSE, RID_NAMESPACE,
87 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
88 RID_THIS, RID_THROW, RID_TRUE,
89 RID_TRY, RID_TYPENAME, RID_TYPEID,
93 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
96 RID_ID, RID_AT_ENCODE, RID_AT_END,
97 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
98 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
99 RID_AT_PROTOCOL, RID_AT_SELECTOR,
100 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
101 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
103 RID_AT_IMPLEMENTATION,
107 RID_FIRST_MODIFIER = RID_STATIC,
108 RID_LAST_MODIFIER = RID_ONEWAY,
110 RID_FIRST_AT = RID_AT_ENCODE,
111 RID_LAST_AT = RID_AT_IMPLEMENTATION,
112 RID_FIRST_PQ = RID_IN,
113 RID_LAST_PQ = RID_ONEWAY
116 #define OBJC_IS_AT_KEYWORD(rid) \
117 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
118 (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
120 #define OBJC_IS_PQ_KEYWORD(rid) \
121 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
122 (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
124 /* The elements of `ridpointers' are identifier nodes for the reserved
125 type names and storage classes. It is indexed by a RID_... value. */
126 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
128 /* Standard named or nameless data types of the C compiler. */
133 CTI_SIGNED_WCHAR_TYPE,
134 CTI_UNSIGNED_WCHAR_TYPE,
136 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
137 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
140 CTI_WIDEST_INT_LIT_TYPE,
141 CTI_WIDEST_UINT_LIT_TYPE,
144 CTI_WCHAR_ARRAY_TYPE,
147 CTI_CONST_STRING_TYPE,
149 /* Type for boolean expressions (bool in C++, int in C). */
152 CTI_TRUTHVALUE_FALSE,
154 CTI_DEFAULT_FUNCTION_TYPE,
156 /* These are not types, but we have to look them up all the time. */
157 CTI_FUNCTION_NAME_DECL,
158 CTI_PRETTY_FUNCTION_NAME_DECL,
159 CTI_C99_FUNCTION_NAME_DECL,
160 CTI_SAVED_FUNCTION_NAME_DECLS,
167 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
169 /* Identifier part common to the C front ends. Inherits from
170 tree_identifier, despite appearances. */
171 struct c_common_identifier GTY(())
173 struct tree_common common;
174 struct cpp_hashnode node;
177 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
178 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
179 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
180 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
181 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
182 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
183 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
184 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
185 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
186 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
188 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
189 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
190 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
192 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
193 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
194 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
195 #define string_type_node c_global_trees[CTI_STRING_TYPE]
196 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
198 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
200 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
201 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
202 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
203 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
205 /* A node for `((void) 0)'. */
206 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
208 extern GTY(()) tree c_global_trees[CTI_MAX];
210 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
211 tree for size reasons. */
212 struct sorted_fields_type GTY(())
215 tree GTY((length ("%h.len"))) elts[1];
218 /* Mark which labels are explicitly declared.
219 These may be shadowed, and may be referenced from nested functions. */
220 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
222 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
223 warning if they undergo concatenation. */
224 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
226 typedef enum c_language_kind
228 clk_c = 0, /* C90, C94 or C99 */
229 clk_objc = 1, /* clk_c with ObjC features. */
230 clk_cxx = 2, /* ANSI/ISO C++ */
231 clk_objcxx = 3 /* clk_cxx with ObjC features. */
235 /* To test for a specific language use c_language, defined by each
236 front end. For "ObjC features" or "not C++" use the macros. */
237 extern c_language_kind c_language;
239 #define c_dialect_cxx() (c_language & clk_cxx)
240 #define c_dialect_objc() (c_language & clk_objc)
242 /* Information about a statement tree. */
244 struct stmt_tree_s GTY(()) {
245 /* The current statment list being collected. */
246 tree x_cur_stmt_list;
248 /* In C++, Nonzero if we should treat statements as full
249 expressions. In particular, this variable is no-zero if at the
250 end of a statement we should destroy any temporaries created
251 during that statement. Similarly, if, at the end of a block, we
252 should destroy any local variables in this block. Normally, this
253 variable is nonzero, since those are the normal semantics of
256 However, in order to represent aggregate initialization code as
257 tree structure, we use statement-expressions. The statements
258 within the statement expression should not result in cleanups
259 being run until the entire enclosing statement is complete.
261 This flag has no effect in C. */
262 int stmts_are_full_exprs_p;
265 typedef struct stmt_tree_s *stmt_tree;
267 /* Global state pertinent to the current function. Some C dialects
268 extend this structure with additional fields. */
270 struct c_language_function GTY(()) {
271 /* While we are parsing the function, this contains information
272 about the statement-tree that we are building. */
273 struct stmt_tree_s x_stmt_tree;
276 /* When building a statement-tree, this is the current statment list
277 being collected. It's TREE_CHAIN is a back-pointer to the previous
280 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
282 /* Language-specific hooks. */
284 extern int (*lang_gimplify_stmt) (tree *);
285 extern void (*lang_expand_function_end) (void);
287 /* Callback that determines if it's ok for a function to have no
288 noreturn attribute. */
289 extern int (*lang_missing_noreturn_ok_p) (tree);
291 extern void push_file_scope (void);
292 extern void pop_file_scope (void);
293 extern int yyparse (void);
294 extern stmt_tree current_stmt_tree (void);
295 extern tree push_stmt_list (void);
296 extern tree re_push_stmt_list (tree);
297 extern tree pop_stmt_list (tree);
298 extern tree add_stmt (tree);
299 extern void add_decl_stmt (tree);
300 extern void push_cleanup (tree, tree, bool);
302 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
303 extern void prep_stmt (tree);
304 extern tree c_begin_if_stmt (void);
305 extern tree c_begin_while_stmt (void);
306 extern void c_finish_while_stmt_cond (tree, tree);
307 extern int c_expand_decl (tree);
309 extern int field_decl_cmp (const void *, const void *);
310 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
313 /* Switches common to the C front ends. */
315 /* Nonzero if prepreprocessing only. */
317 extern int flag_preprocess_only;
319 /* Zero means that faster, ...NonNil variants of objc_msgSend...
320 calls will be used in ObjC; passing nil receivers to such calls
321 will most likely result in crashes. */
322 extern int flag_nil_receivers;
324 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
325 @try, etc.) in source code. */
326 extern int flag_objc_exceptions;
328 /* Nonzero means that code generation will be altered to support
329 "zero-link" execution. This currently affects ObjC only, but may
330 affect other languages in the future. */
331 extern int flag_zero_link;
333 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
334 unit. It will inform the ObjC runtime that class definition(s) herein
335 contained are to replace one(s) previously loaded. */
336 extern int flag_replace_objc_classes;
338 /* Nonzero means don't output line number information. */
340 extern char flag_no_line_commands;
342 /* Nonzero causes -E output not to be done, but directives such as
343 #define that have side effects are still obeyed. */
345 extern char flag_no_output;
347 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
348 'N' of the command line switch. */
350 extern char flag_dump_macros;
352 /* Nonzero means pass #include lines through to the output. */
354 extern char flag_dump_includes;
356 /* The file name to which we should write a precompiled header, or
357 NULL if no header will be written in this compile. */
359 extern const char *pch_file;
361 /* Nonzero if an ISO standard was selected. It rejects macros in the
366 /* Nonzero if -undef was given. It suppresses target built-in macros
369 extern int flag_undef;
371 /* Nonzero means don't recognize the non-ANSI builtin functions. */
373 extern int flag_no_builtin;
375 /* Nonzero means don't recognize the non-ANSI builtin functions.
378 extern int flag_no_nonansi_builtin;
380 /* Nonzero means give `double' the same size as `float'. */
382 extern int flag_short_double;
384 /* Nonzero means give `wchar_t' the same size as `short'. */
386 extern int flag_short_wchar;
388 /* Nonzero means allow Microsoft extensions without warnings or errors. */
389 extern int flag_ms_extensions;
391 /* Nonzero means don't recognize the keyword `asm'. */
393 extern int flag_no_asm;
395 /* Nonzero means give string constants the type `const char *', as mandated
398 extern int flag_const_strings;
400 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
402 extern int flag_signed_bitfields;
403 extern int explicit_flag_signed_bitfields;
405 /* Nonzero means warn about pointer casts that can drop a type qualifier
406 from the pointer target type. */
408 extern int warn_cast_qual;
410 /* Warn about functions which might be candidates for format attributes. */
412 extern int warn_missing_format_attribute;
414 /* Nonzero means warn about sizeof(function) or addition/subtraction
415 of function pointers. */
417 extern int warn_pointer_arith;
419 /* Nonzero means warn for any global function def
420 without separate previous prototype decl. */
422 extern int warn_missing_prototypes;
424 /* Warn if adding () is suggested. */
426 extern int warn_parentheses;
428 /* Warn if initializer is not completely bracketed. */
430 extern int warn_missing_braces;
432 /* Warn about comparison of signed and unsigned values.
433 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
435 extern int warn_sign_compare;
437 /* Nonzero means warn about usage of long long when `-pedantic'. */
439 extern int warn_long_long;
441 /* Nonzero means warn about deprecated conversion from string constant to
444 extern int warn_write_strings;
446 /* Nonzero means warn about multiple (redundant) decls for the same single
447 variable or function. */
449 extern int warn_redundant_decls;
451 /* Warn about testing equality of floating point numbers. */
453 extern int warn_float_equal;
455 /* Warn about a subscript that has type char. */
457 extern int warn_char_subscripts;
459 /* Warn if a type conversion is done that might have confusing results. */
461 extern int warn_conversion;
463 /* Warn about #pragma directives that are not recognized. */
465 extern int warn_unknown_pragmas; /* Tri state variable. */
467 /* Warn about format/argument anomalies in calls to formatted I/O functions
468 (*printf, *scanf, strftime, strfmon, etc.). */
470 extern int warn_format;
472 /* Warn about Y2K problems with strftime formats. */
474 extern int warn_format_y2k;
476 /* Warn about excess arguments to formats. */
478 extern int warn_format_extra_args;
480 /* Warn about zero-length formats. */
482 extern int warn_format_zero_length;
484 /* Warn about non-literal format arguments. */
486 extern int warn_format_nonliteral;
488 /* Warn about possible security problems with calls to format functions. */
490 extern int warn_format_security;
493 /* C/ObjC language option variables. */
496 /* Nonzero means message about use of implicit function declarations;
497 1 means warning; 2 means error. */
499 extern int mesg_implicit_function_declaration;
501 /* Nonzero means allow type mismatches in conditional expressions;
502 just make their values `void'. */
504 extern int flag_cond_mismatch;
506 /* Nonzero means enable C89 Amendment 1 features. */
508 extern int flag_isoc94;
510 /* Nonzero means use the ISO C99 dialect of C. */
512 extern int flag_isoc99;
514 /* Nonzero means that we have builtin functions, and main is an int. */
516 extern int flag_hosted;
518 /* Nonzero means warn when casting a function call to a type that does
519 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
520 when there is no previous declaration of sqrt or malloc. */
522 extern int warn_bad_function_cast;
524 /* Warn about traditional constructs whose meanings changed in ANSI C. */
526 extern int warn_traditional;
528 /* Nonzero means warn for a declaration found after a statement. */
530 extern int warn_declaration_after_statement;
532 /* Nonzero means warn for non-prototype function decls
533 or non-prototyped defs without previous prototype. */
535 extern int warn_strict_prototypes;
537 /* Nonzero means warn for any global function def
538 without separate previous decl. */
540 extern int warn_missing_declarations;
542 /* Nonzero means warn about extern declarations of objects not at
543 file-scope level and about *all* declarations of functions (whether
544 extern or static) not at file-scope level. Note that we exclude
545 implicit function declarations. To get warnings about those, use
548 extern int warn_nested_externs;
550 /* Warn if main is suspicious. */
552 extern int warn_main;
554 /* Nonzero means warn about possible violations of sequence point rules. */
556 extern int warn_sequence_point;
558 /* Nonzero means warn about uninitialized variable when it is initialized with itself.
559 For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
561 extern int warn_init_self;
564 /* Nonzero means to warn about compile-time division by zero. */
565 extern int warn_div_by_zero;
567 /* Nonzero means warn about use of implicit int. */
569 extern int warn_implicit_int;
571 /* Warn about NULL being passed to argument slots marked as requiring
574 extern int warn_nonnull;
576 /* Warn about old-style parameter declaration. */
578 extern int warn_old_style_definition;
581 /* ObjC language option variables. */
584 /* Open and close the file for outputting class declarations, if
587 extern int flag_gen_declaration;
589 /* Generate code for GNU or NeXT runtime environment. */
591 extern int flag_next_runtime;
593 /* Tells the compiler that this is a special run. Do not perform any
594 compiling, instead we are to test some platform dependent features
595 and output a C header file with appropriate definitions. */
597 extern int print_struct_values;
599 /* ???. Undocumented. */
601 extern const char *constant_string_class_name;
603 /* Warn if multiple methods are seen for the same selector, but with
604 different argument types. Performs the check on the whole selector
605 table at the end of compilation. */
607 extern int warn_selector;
609 /* Warn if a @selector() is found, and no method with that selector
610 has been previously declared. The check is done on each
611 @selector() as soon as it is found - so it warns about forward
614 extern int warn_undeclared_selector;
616 /* Warn if methods required by a protocol are not implemented in the
617 class adopting it. When turned off, methods inherited to that
618 class are also considered implemented. */
620 extern int warn_protocol;
623 /* C++ language option variables. */
626 /* Nonzero means don't recognize any extension keywords. */
628 extern int flag_no_gnu_keywords;
630 /* Nonzero means do emit exported implementations of functions even if
631 they can be inlined. */
633 extern int flag_implement_inlines;
635 /* Nonzero means that implicit instantiations will be emitted if needed. */
637 extern int flag_implicit_templates;
639 /* Nonzero means that implicit instantiations of inline templates will be
640 emitted if needed, even if instantiations of non-inline templates
643 extern int flag_implicit_inline_templates;
645 /* Nonzero means generate separate instantiation control files and
646 juggle them at link time. */
648 extern int flag_use_repository;
650 /* Nonzero if we want to issue diagnostics that the standard says are not
653 extern int flag_optional_diags;
655 /* Nonzero means we should attempt to elide constructors when possible. */
657 extern int flag_elide_constructors;
659 /* Nonzero means that member functions defined in class scope are
660 inline by default. */
662 extern int flag_default_inline;
664 /* Controls whether compiler generates 'type descriptor' that give
665 run-time type information. */
667 extern int flag_rtti;
669 /* Nonzero if we want to conserve space in the .o files. We do this
670 by putting uninitialized data and runtime initialized data into
671 .common instead of .data at the expense of not flagging multiple
674 extern int flag_conserve_space;
676 /* Nonzero if we want to obey access control semantics. */
678 extern int flag_access_control;
680 /* Nonzero if we want to check the return value of new and avoid calling
681 constructors if it is a null pointer. */
683 extern int flag_check_new;
685 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
686 initialization variables.
687 0: Old rules, set by -fno-for-scope.
688 2: New ISO rules, set by -ffor-scope.
689 1: Try to implement new ISO rules, but with backup compatibility
690 (and warnings). This is the default, for now. */
692 extern int flag_new_for_scope;
694 /* Nonzero if we want to emit defined symbols with common-like linkage as
695 weak symbols where possible, in order to conform to C++ semantics.
696 Otherwise, emit them as local symbols. */
698 extern int flag_weak;
700 /* 0 means we want the preprocessor to not emit line directives for
701 the current working directory. 1 means we want it to do it. -1
702 means we should decide depending on whether debugging information
703 is being emitted or not. */
705 extern int flag_working_directory;
707 /* Nonzero to use __cxa_atexit, rather than atexit, to register
708 destructors for local statics and global objects. */
710 extern int flag_use_cxa_atexit;
712 /* Nonzero means make the default pedwarns warnings instead of errors.
713 The value of this flag is ignored if -pedantic is specified. */
715 extern int flag_permissive;
717 /* Nonzero means to implement standard semantics for exception
718 specifications, calling unexpected if an exception is thrown that
719 doesn't match the specification. Zero means to treat them as
720 assertions and optimize accordingly, but not check them. */
722 extern int flag_enforce_eh_specs;
724 /* Nonzero means warn about things that will change when compiling
725 with an ABI-compliant compiler. */
729 /* Nonzero means warn about invalid uses of offsetof. */
731 extern int warn_invalid_offsetof;
733 /* Nonzero means warn about implicit declarations. */
735 extern int warn_implicit;
737 /* Nonzero means warn when all ctors or dtors are private, and the class
740 extern int warn_ctor_dtor_privacy;
742 /* Nonzero means warn in function declared in derived class has the
743 same name as a virtual in the base class, but fails to match the
744 type signature of any virtual function in the base class. */
746 extern int warn_overloaded_virtual;
748 /* Nonzero means warn when declaring a class that has a non virtual
749 destructor, when it really ought to have a virtual one. */
751 extern int warn_nonvdtor;
753 /* Nonzero means warn when the compiler will reorder code. */
755 extern int warn_reorder;
757 /* Nonzero means warn when synthesis behavior differs from Cfront's. */
759 extern int warn_synth;
761 /* Nonzero means warn when we convert a pointer to member function
762 into a pointer to (void or function). */
764 extern int warn_pmf2ptr;
766 /* Nonzero means warn about violation of some Effective C++ style rules. */
768 extern int warn_ecpp;
770 /* Nonzero means warn where overload resolution chooses a promotion from
771 unsigned to signed over a conversion to an unsigned of the same size. */
773 extern int warn_sign_promo;
775 /* Nonzero means warn when an old-style cast is used. */
777 extern int warn_old_style_cast;
779 /* Nonzero means warn when non-templatized friend functions are
780 declared within a template */
782 extern int warn_nontemplate_friend;
784 /* Nonzero means complain about deprecated features. */
786 extern int warn_deprecated;
788 /* Maximum template instantiation depth. This limit is rather
789 arbitrary, but it exists to limit the time it takes to notice
790 infinite template instantiations. */
792 extern int max_tinst_depth;
794 /* Nonzero means the expression being parsed will never be evaluated.
795 This is a count, since unevaluated expressions can nest. */
797 extern int skip_evaluation;
799 /* C types are partitioned into three subsets: object, function, and
801 #define C_TYPE_OBJECT_P(type) \
802 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
804 #define C_TYPE_INCOMPLETE_P(type) \
805 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
807 #define C_TYPE_FUNCTION_P(type) \
808 (TREE_CODE (type) == FUNCTION_TYPE)
810 /* For convenience we define a single macro to identify the class of
811 object or incomplete types. */
812 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
813 (!C_TYPE_FUNCTION_P (type))
815 /* Record in each node resulting from a binary operator
816 what operator was specified for it. */
817 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
819 /* Attribute table common to the C front ends. */
820 extern const struct attribute_spec c_common_attribute_table[];
821 extern const struct attribute_spec c_common_format_attribute_table[];
823 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
824 ID is the identifier to use, NAME is the string.
825 TYPE_DEP indicates whether it depends on type of the function or not
826 (i.e. __PRETTY_FUNCTION__). */
828 extern tree (*make_fname_decl) (tree, int);
830 extern tree identifier_global_value (tree);
831 extern void record_builtin_type (enum rid, const char *, tree);
832 extern tree build_void_list_node (void);
833 extern void start_fname_decls (void);
834 extern void finish_fname_decls (void);
835 extern const char *fname_as_string (int);
836 extern tree fname_decl (unsigned, tree);
838 extern void check_function_arguments (tree, tree);
839 extern void check_function_arguments_recurse (void (*)
841 unsigned HOST_WIDE_INT),
843 unsigned HOST_WIDE_INT);
844 extern void check_function_format (int *, tree, tree);
845 extern void set_Wformat (int);
846 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
847 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
848 extern int c_common_handle_option (size_t code, const char *arg, int value);
849 extern bool c_common_missing_argument (const char *opt, size_t code);
850 extern tree c_common_type_for_mode (enum machine_mode, int);
851 extern tree c_common_type_for_size (unsigned int, int);
852 extern tree c_common_unsigned_type (tree);
853 extern tree c_common_signed_type (tree);
854 extern tree c_common_signed_or_unsigned_type (int, tree);
855 extern tree c_common_truthvalue_conversion (tree);
856 extern void c_apply_type_quals_to_decl (int, tree);
857 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
858 extern tree c_alignof_expr (tree);
859 /* Print an error message for invalid operands to arith operation CODE.
860 NOP_EXPR is used as a special case (see truthvalue_conversion). */
861 extern void binary_op_error (enum tree_code);
862 #define my_friendly_assert(EXP, N) (void) \
863 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
865 extern tree c_expand_expr_stmt (tree);
866 /* Validate the expression after `case' and apply default promotions. */
867 extern tree check_case_value (tree);
868 extern tree fix_string_type (tree);
869 struct varray_head_tag;
870 extern void constant_expression_warning (tree);
871 extern tree convert_and_check (tree, tree);
872 extern void overflow_warning (tree);
873 extern void unsigned_conversion_warning (tree, tree);
875 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
876 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
878 /* Subroutine of build_binary_op, used for comparison operations.
879 See if the operands have both been converted from subword integer types
880 and, if so, perhaps change them both back to their original type. */
881 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
883 extern tree pointer_int_sum (enum tree_code, tree, tree);
884 extern unsigned int min_precision (tree, int);
886 /* Add qualifiers to a type, in the fashion for C. */
887 extern tree c_build_qualified_type (tree, int);
889 /* Build tree nodes and builtin functions common to both C and C++ language
891 extern void c_common_nodes_and_builtins (void);
893 extern void disable_builtin_function (const char *);
895 extern tree build_va_arg (tree, tree);
897 extern unsigned int c_common_init_options (unsigned int, const char **);
898 extern bool c_common_post_options (const char **);
899 extern bool c_common_init (void);
900 extern void c_common_finish (void);
901 extern void c_common_parse_file (int);
902 extern HOST_WIDE_INT c_common_get_alias_set (tree);
903 extern void c_register_builtin_type (tree, const char*);
904 extern bool c_promoting_integer_type_p (tree);
905 extern int self_promoting_args_p (tree);
906 extern tree strip_array_types (tree);
907 extern tree strip_pointer_operator (tree);
909 /* This is the basic parsing function. */
910 extern void c_parse_file (void);
911 /* This is misnamed, it actually performs end-of-compilation processing. */
912 extern void finish_file (void);
914 /* These macros provide convenient access to the various _STMT nodes. */
916 /* Nonzero if this statement should be considered a full-expression,
917 i.e., if temporaries created during this statement should have
918 their destructors run at the end of this statement. (In C, this
919 will always be false, since there are no destructors.) */
920 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
922 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
923 if a statement expression. */
924 #define STATEMENT_LIST_STMT_EXPR(NODE) \
925 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
927 /* IF_STMT accessors. These give access to the condition of the if
928 statement, the then block of the if statement, and the else block
929 of the if statement if it exists. */
930 #define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
931 #define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
932 #define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
934 /* WHILE_STMT accessors. These give access to the condition of the
935 while statement and the body of the while statement, respectively. */
936 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
937 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
939 /* DO_STMT accessors. These give access to the condition of the do
940 statement and the body of the do statement, respectively. */
941 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
942 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
944 /* RETURN_STMT accessors. These give the expression associated with a
945 return statement, and whether it should be ignored when expanding
946 (as opposed to inlining). */
947 #define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
949 /* EXPR_STMT accessor. This gives the expression associated with an
950 expression statement. */
951 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
953 /* FOR_STMT accessors. These give access to the init statement,
954 condition, update expression, and body of the for statement,
956 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
957 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
958 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
959 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
961 #define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
962 #define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
964 /* True for goto created artificially by the compiler. */
965 #define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
967 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
968 statements associated with a compound statement. The result is the
969 first statement in the list. Succeeding nodes can be accessed by
970 calling TREE_CHAIN on a node in the list. */
971 #define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
973 /* DECL_STMT accessor. This gives access to the DECL associated with
974 the given declaration statement. */
975 #define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
977 /* STMT_EXPR accessor. */
978 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
980 /* Nonzero if this statement-expression does not have an associated scope. */
981 #define STMT_EXPR_NO_SCOPE(NODE) \
982 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
984 /* LABEL_STMT accessor. This gives access to the label associated with
985 the given label statement. */
986 #define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
988 /* COMPOUND_LITERAL_EXPR accessors. */
989 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
990 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
991 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
992 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
994 /* The body of the CLEANUP_STMT. */
995 #define CLEANUP_BODY(NODE) \
996 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
997 /* The cleanup to run in a CLEANUP_STMT. */
998 #define CLEANUP_EXPR(NODE) \
999 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1000 /* The VAR_DECL to clean up in a CLEANUP_STMT. */
1001 #define CLEANUP_DECL(NODE) \
1002 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 2)
1004 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1007 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1008 #include "c-common.def"
1014 #define c_common_stmt_codes \
1015 CLEANUP_STMT, EXPR_STMT, COMPOUND_STMT, \
1016 DECL_STMT, IF_STMT, FOR_STMT, \
1017 WHILE_STMT, DO_STMT, RETURN_STMT, \
1018 BREAK_STMT, CONTINUE_STMT, \
1019 SWITCH_STMT, GOTO_STMT, LABEL_STMT, \
1020 ASM_STMT, CASE_LABEL
1022 /* TRUE if a code represents a statement. The front end init
1023 langhook should take care of initialization of this array. */
1024 extern bool statement_code_p[MAX_TREE_CODES];
1026 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1028 #define INIT_STATEMENT_CODES(STMT_CODES) \
1031 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
1032 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
1033 statement_code_p[STMT_CODES[i]] = true; \
1036 extern int stmts_are_full_exprs_p (void);
1037 extern int anon_aggr_type_p (tree);
1039 /* For a VAR_DECL that is an anonymous union, these are the various
1040 sub-variables that make up the anonymous union. */
1041 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1043 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1044 #define DECL_C_BIT_FIELD(NODE) \
1045 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1046 #define SET_DECL_C_BIT_FIELD(NODE) \
1047 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1048 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1049 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1051 extern void emit_local_var (tree);
1052 extern void make_rtl_for_local_static (tree);
1053 extern tree c_expand_return (tree);
1054 extern tree do_case (tree, tree);
1055 extern tree build_stmt (enum tree_code, ...);
1056 extern tree build_case_label (tree, tree, tree);
1057 extern tree build_continue_stmt (void);
1058 extern tree build_break_stmt (void);
1059 extern tree build_return_stmt (tree);
1061 extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1063 /* These functions must be defined by each front-end which implements
1064 a variant of the C language. They are used in c-common.c. */
1066 extern tree build_unary_op (enum tree_code, tree, int);
1067 extern tree build_binary_op (enum tree_code, tree, tree, int);
1068 extern int lvalue_p (tree);
1069 extern tree default_conversion (tree);
1071 /* Given two integer or real types, return the type for their sum.
1072 Given two compatible ANSI C types, returns the merged type. */
1074 extern tree common_type (tree, tree);
1076 extern tree expand_tree_builtin (tree, tree, tree);
1078 extern tree decl_constant_value (tree);
1080 /* Handle increment and decrement of boolean types. */
1081 extern tree boolean_increment (enum tree_code, tree);
1083 /* Hook currently used only by the C++ front end to reset internal state
1084 after entering or leaving a header file. */
1085 extern void extract_interface_info (void);
1087 extern int case_compare (splay_tree_key, splay_tree_key);
1089 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1091 extern void c_do_switch_warnings (splay_tree, tree);
1093 extern tree build_function_call (tree, tree);
1095 extern tree finish_label_address_expr (tree);
1097 /* Same function prototype, but the C and C++ front ends have
1098 different implementations. Used in c-common.c. */
1099 extern tree lookup_label (tree);
1101 extern int vector_types_convertible_p (tree t1, tree t2);
1103 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1105 extern int c_safe_from_p (rtx, tree);
1107 extern int c_staticp (tree);
1109 extern int c_common_unsafe_for_reeval (tree);
1111 extern void init_c_lex (void);
1113 extern void c_cpp_builtins (cpp_reader *);
1115 /* Positive if an implicit `extern "C"' scope has just been entered;
1116 negative if such a scope has just been exited. */
1117 extern GTY(()) int pending_lang_change;
1119 /* Information recorded about each file examined during compilation. */
1123 int time; /* Time spent in the file. */
1124 short interface_only; /* Flags - used only by C++ */
1125 short interface_unknown;
1128 struct c_fileinfo *get_fileinfo (const char *);
1129 extern void dump_time_statistics (void);
1131 extern bool c_dump_tree (void *, tree);
1133 extern int c_gimplify_expr (tree *, tree *, tree *);
1134 extern tree c_walk_subtrees (tree*, int*, walk_tree_fn, void*, void*);
1136 extern void c_warn_unused_result (tree *);
1138 /* In c-simplify.c */
1139 extern void c_genericize (tree);
1140 extern int c_gimplify_stmt (tree *);
1141 extern tree c_build_bind_expr (tree, tree);
1143 extern void pch_init (void);
1144 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1145 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1147 extern void c_common_write_pch (void);
1148 extern void c_common_no_more_pch (void);
1149 extern void builtin_define_with_value (const char *, const char *, int);
1150 extern void c_stddef_cpp_builtins (void);
1151 extern void fe_file_change (const struct line_map *);
1152 extern void c_parse_error (const char *, enum cpp_ttype, tree);
1154 /* The following have been moved here from c-tree.h, since they're needed
1155 in the ObjC++ world, too. What is more, stub-objc.c could use a few
1157 extern tree lookup_interface (tree);
1158 extern tree is_class_name (tree);
1159 extern tree objc_is_object_ptr (tree);
1160 extern void objc_check_decl (tree);
1161 extern int objc_comptypes (tree, tree, int);
1162 extern tree objc_message_selector (void);
1163 extern tree lookup_objc_ivar (tree);
1164 extern void *get_current_scope (void);
1165 extern void objc_mark_locals_volatile (void *);
1166 extern void objc_clear_super_receiver (void);
1167 extern int objc_is_public (tree, tree);
1169 /* In c-ppoutput.c */
1170 extern void init_pp_output (FILE *);
1171 extern void preprocess_file (cpp_reader *);
1172 extern void pp_file_change (const struct line_map *);
1173 extern void pp_dir_change (cpp_reader *, const char *);
1175 #endif /* ! GCC_C_COMMON_H */