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 push_cleanup (tree, tree, bool);
299 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
300 extern int c_expand_decl (tree);
302 extern int field_decl_cmp (const void *, const void *);
303 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
305 extern bool has_c_linkage (tree decl);
307 /* Switches common to the C front ends. */
309 /* Nonzero if prepreprocessing only. */
311 extern int flag_preprocess_only;
313 /* Zero means that faster, ...NonNil variants of objc_msgSend...
314 calls will be used in ObjC; passing nil receivers to such calls
315 will most likely result in crashes. */
316 extern int flag_nil_receivers;
318 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
319 @try, etc.) in source code. */
320 extern int flag_objc_exceptions;
322 /* Nonzero means that we generate NeXT setjmp based exceptions. */
323 extern int flag_objc_sjlj_exceptions;
325 /* Nonzero means that code generation will be altered to support
326 "zero-link" execution. This currently affects ObjC only, but may
327 affect other languages in the future. */
328 extern int flag_zero_link;
330 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
331 unit. It will inform the ObjC runtime that class definition(s) herein
332 contained are to replace one(s) previously loaded. */
333 extern int flag_replace_objc_classes;
335 /* Nonzero means don't output line number information. */
337 extern char flag_no_line_commands;
339 /* Nonzero causes -E output not to be done, but directives such as
340 #define that have side effects are still obeyed. */
342 extern char flag_no_output;
344 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
345 'N' of the command line switch. */
347 extern char flag_dump_macros;
349 /* Nonzero means pass #include lines through to the output. */
351 extern char flag_dump_includes;
353 /* The file name to which we should write a precompiled header, or
354 NULL if no header will be written in this compile. */
356 extern const char *pch_file;
358 /* Nonzero if an ISO standard was selected. It rejects macros in the
363 /* Nonzero if -undef was given. It suppresses target built-in macros
366 extern int flag_undef;
368 /* Nonzero means don't recognize the non-ANSI builtin functions. */
370 extern int flag_no_builtin;
372 /* Nonzero means don't recognize the non-ANSI builtin functions.
375 extern int flag_no_nonansi_builtin;
377 /* Nonzero means give `double' the same size as `float'. */
379 extern int flag_short_double;
381 /* Nonzero means give `wchar_t' the same size as `short'. */
383 extern int flag_short_wchar;
385 /* Nonzero means allow Microsoft extensions without warnings or errors. */
386 extern int flag_ms_extensions;
388 /* Nonzero means don't recognize the keyword `asm'. */
390 extern int flag_no_asm;
392 /* Nonzero means give string constants the type `const char *', as mandated
395 extern int flag_const_strings;
397 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
399 extern int flag_signed_bitfields;
400 extern int explicit_flag_signed_bitfields;
402 /* Nonzero means warn about pointer casts that can drop a type qualifier
403 from the pointer target type. */
405 extern int warn_cast_qual;
407 /* Warn about functions which might be candidates for format attributes. */
409 extern int warn_missing_format_attribute;
411 /* Nonzero means warn about sizeof(function) or addition/subtraction
412 of function pointers. */
414 extern int warn_pointer_arith;
416 /* Nonzero means warn for any global function def
417 without separate previous prototype decl. */
419 extern int warn_missing_prototypes;
421 /* Warn if adding () is suggested. */
423 extern int warn_parentheses;
425 /* Warn if initializer is not completely bracketed. */
427 extern int warn_missing_braces;
429 /* Warn about comparison of signed and unsigned values.
430 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
432 extern int warn_sign_compare;
434 /* Nonzero means warn about usage of long long when `-pedantic'. */
436 extern int warn_long_long;
438 /* Nonzero means warn about deprecated conversion from string constant to
441 extern int warn_write_strings;
443 /* Nonzero means warn about multiple (redundant) decls for the same single
444 variable or function. */
446 extern int warn_redundant_decls;
448 /* Warn about testing equality of floating point numbers. */
450 extern int warn_float_equal;
452 /* Warn about a subscript that has type char. */
454 extern int warn_char_subscripts;
456 /* Warn if a type conversion is done that might have confusing results. */
458 extern int warn_conversion;
460 /* Warn about #pragma directives that are not recognized. */
462 extern int warn_unknown_pragmas; /* Tri state variable. */
464 /* Warn about format/argument anomalies in calls to formatted I/O functions
465 (*printf, *scanf, strftime, strfmon, etc.). */
467 extern int warn_format;
469 /* Warn about Y2K problems with strftime formats. */
471 extern int warn_format_y2k;
473 /* Warn about excess arguments to formats. */
475 extern int warn_format_extra_args;
477 /* Warn about zero-length formats. */
479 extern int warn_format_zero_length;
481 /* Warn about non-literal format arguments. */
483 extern int warn_format_nonliteral;
485 /* Warn about possible security problems with calls to format functions. */
487 extern int warn_format_security;
490 /* C/ObjC language option variables. */
493 /* Nonzero means message about use of implicit function declarations;
494 1 means warning; 2 means error. */
496 extern int mesg_implicit_function_declaration;
498 /* Nonzero means allow type mismatches in conditional expressions;
499 just make their values `void'. */
501 extern int flag_cond_mismatch;
503 /* Nonzero means enable C89 Amendment 1 features. */
505 extern int flag_isoc94;
507 /* Nonzero means use the ISO C99 dialect of C. */
509 extern int flag_isoc99;
511 /* Nonzero means that we have builtin functions, and main is an int. */
513 extern int flag_hosted;
515 /* Nonzero means warn when casting a function call to a type that does
516 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
517 when there is no previous declaration of sqrt or malloc. */
519 extern int warn_bad_function_cast;
521 /* Warn about traditional constructs whose meanings changed in ANSI C. */
523 extern int warn_traditional;
525 /* Nonzero means warn for a declaration found after a statement. */
527 extern int warn_declaration_after_statement;
529 /* Nonzero means warn for non-prototype function decls
530 or non-prototyped defs without previous prototype. */
532 extern int warn_strict_prototypes;
534 /* Nonzero means warn for any global function def
535 without separate previous decl. */
537 extern int warn_missing_declarations;
539 /* Nonzero means warn about extern declarations of objects not at
540 file-scope level and about *all* declarations of functions (whether
541 extern or static) not at file-scope level. Note that we exclude
542 implicit function declarations. To get warnings about those, use
545 extern int warn_nested_externs;
547 /* Warn if main is suspicious. */
549 extern int warn_main;
551 /* Nonzero means warn about possible violations of sequence point rules. */
553 extern int warn_sequence_point;
555 /* Nonzero means warn about uninitialized variable when it is initialized with itself.
556 For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
558 extern int warn_init_self;
561 /* Nonzero means to warn about compile-time division by zero. */
562 extern int warn_div_by_zero;
564 /* Nonzero means warn about use of implicit int. */
566 extern int warn_implicit_int;
568 /* Warn about NULL being passed to argument slots marked as requiring
571 extern int warn_nonnull;
573 /* Warn about old-style parameter declaration. */
575 extern int warn_old_style_definition;
578 /* ObjC language option variables. */
581 /* Open and close the file for outputting class declarations, if
584 extern int flag_gen_declaration;
586 /* Generate code for GNU or NeXT runtime environment. */
588 extern int flag_next_runtime;
590 /* Tells the compiler that this is a special run. Do not perform any
591 compiling, instead we are to test some platform dependent features
592 and output a C header file with appropriate definitions. */
594 extern int print_struct_values;
596 /* ???. Undocumented. */
598 extern const char *constant_string_class_name;
600 /* Warn if multiple methods are seen for the same selector, but with
601 different argument types. Performs the check on the whole selector
602 table at the end of compilation. */
604 extern int warn_selector;
606 /* Warn if a @selector() is found, and no method with that selector
607 has been previously declared. The check is done on each
608 @selector() as soon as it is found - so it warns about forward
611 extern int warn_undeclared_selector;
613 /* Warn if methods required by a protocol are not implemented in the
614 class adopting it. When turned off, methods inherited to that
615 class are also considered implemented. */
617 extern int warn_protocol;
620 /* C++ language option variables. */
623 /* Nonzero means don't recognize any extension keywords. */
625 extern int flag_no_gnu_keywords;
627 /* Nonzero means do emit exported implementations of functions even if
628 they can be inlined. */
630 extern int flag_implement_inlines;
632 /* Nonzero means that implicit instantiations will be emitted if needed. */
634 extern int flag_implicit_templates;
636 /* Nonzero means that implicit instantiations of inline templates will be
637 emitted if needed, even if instantiations of non-inline templates
640 extern int flag_implicit_inline_templates;
642 /* Nonzero means generate separate instantiation control files and
643 juggle them at link time. */
645 extern int flag_use_repository;
647 /* Nonzero if we want to issue diagnostics that the standard says are not
650 extern int flag_optional_diags;
652 /* Nonzero means we should attempt to elide constructors when possible. */
654 extern int flag_elide_constructors;
656 /* Nonzero means that member functions defined in class scope are
657 inline by default. */
659 extern int flag_default_inline;
661 /* Controls whether compiler generates 'type descriptor' that give
662 run-time type information. */
664 extern int flag_rtti;
666 /* Nonzero if we want to conserve space in the .o files. We do this
667 by putting uninitialized data and runtime initialized data into
668 .common instead of .data at the expense of not flagging multiple
671 extern int flag_conserve_space;
673 /* Nonzero if we want to obey access control semantics. */
675 extern int flag_access_control;
677 /* Nonzero if we want to check the return value of new and avoid calling
678 constructors if it is a null pointer. */
680 extern int flag_check_new;
682 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
683 initialization variables.
684 0: Old rules, set by -fno-for-scope.
685 2: New ISO rules, set by -ffor-scope.
686 1: Try to implement new ISO rules, but with backup compatibility
687 (and warnings). This is the default, for now. */
689 extern int flag_new_for_scope;
691 /* Nonzero if we want to emit defined symbols with common-like linkage as
692 weak symbols where possible, in order to conform to C++ semantics.
693 Otherwise, emit them as local symbols. */
695 extern int flag_weak;
697 /* 0 means we want the preprocessor to not emit line directives for
698 the current working directory. 1 means we want it to do it. -1
699 means we should decide depending on whether debugging information
700 is being emitted or not. */
702 extern int flag_working_directory;
704 /* Nonzero to use __cxa_atexit, rather than atexit, to register
705 destructors for local statics and global objects. */
707 extern int flag_use_cxa_atexit;
709 /* Nonzero means make the default pedwarns warnings instead of errors.
710 The value of this flag is ignored if -pedantic is specified. */
712 extern int flag_permissive;
714 /* Nonzero means to implement standard semantics for exception
715 specifications, calling unexpected if an exception is thrown that
716 doesn't match the specification. Zero means to treat them as
717 assertions and optimize accordingly, but not check them. */
719 extern int flag_enforce_eh_specs;
721 /* Nonzero means warn about things that will change when compiling
722 with an ABI-compliant compiler. */
726 /* Nonzero means warn about invalid uses of offsetof. */
728 extern int warn_invalid_offsetof;
730 /* Nonzero means warn about implicit declarations. */
732 extern int warn_implicit;
734 /* Nonzero means warn when all ctors or dtors are private, and the class
737 extern int warn_ctor_dtor_privacy;
739 /* Nonzero means warn in function declared in derived class has the
740 same name as a virtual in the base class, but fails to match the
741 type signature of any virtual function in the base class. */
743 extern int warn_overloaded_virtual;
745 /* Nonzero means warn when declaring a class that has a non virtual
746 destructor, when it really ought to have a virtual one. */
748 extern int warn_nonvdtor;
750 /* Nonzero means warn when the compiler will reorder code. */
752 extern int warn_reorder;
754 /* Nonzero means warn when synthesis behavior differs from Cfront's. */
756 extern int warn_synth;
758 /* Nonzero means warn when we convert a pointer to member function
759 into a pointer to (void or function). */
761 extern int warn_pmf2ptr;
763 /* Nonzero means warn about violation of some Effective C++ style rules. */
765 extern int warn_ecpp;
767 /* Nonzero means warn where overload resolution chooses a promotion from
768 unsigned to signed over a conversion to an unsigned of the same size. */
770 extern int warn_sign_promo;
772 /* Nonzero means warn when an old-style cast is used. */
774 extern int warn_old_style_cast;
776 /* Nonzero means warn when non-templatized friend functions are
777 declared within a template */
779 extern int warn_nontemplate_friend;
781 /* Nonzero means complain about deprecated features. */
783 extern int warn_deprecated;
785 /* Maximum template instantiation depth. This limit is rather
786 arbitrary, but it exists to limit the time it takes to notice
787 infinite template instantiations. */
789 extern int max_tinst_depth;
791 /* Nonzero means the expression being parsed will never be evaluated.
792 This is a count, since unevaluated expressions can nest. */
794 extern int skip_evaluation;
796 /* C types are partitioned into three subsets: object, function, and
798 #define C_TYPE_OBJECT_P(type) \
799 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
801 #define C_TYPE_INCOMPLETE_P(type) \
802 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
804 #define C_TYPE_FUNCTION_P(type) \
805 (TREE_CODE (type) == FUNCTION_TYPE)
807 /* For convenience we define a single macro to identify the class of
808 object or incomplete types. */
809 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
810 (!C_TYPE_FUNCTION_P (type))
812 /* Record in each node resulting from a binary operator
813 what operator was specified for it. */
814 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
816 /* Attribute table common to the C front ends. */
817 extern const struct attribute_spec c_common_attribute_table[];
818 extern const struct attribute_spec c_common_format_attribute_table[];
820 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
821 ID is the identifier to use, NAME is the string.
822 TYPE_DEP indicates whether it depends on type of the function or not
823 (i.e. __PRETTY_FUNCTION__). */
825 extern tree (*make_fname_decl) (tree, int);
827 extern tree identifier_global_value (tree);
828 extern void record_builtin_type (enum rid, const char *, tree);
829 extern tree build_void_list_node (void);
830 extern void start_fname_decls (void);
831 extern void finish_fname_decls (void);
832 extern const char *fname_as_string (int);
833 extern tree fname_decl (unsigned, tree);
835 extern void check_function_arguments (tree, tree);
836 extern void check_function_arguments_recurse (void (*)
838 unsigned HOST_WIDE_INT),
840 unsigned HOST_WIDE_INT);
841 extern void check_function_format (int *, tree, tree);
842 extern void set_Wformat (int);
843 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
844 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
845 extern int c_common_handle_option (size_t code, const char *arg, int value);
846 extern bool c_common_missing_argument (const char *opt, size_t code);
847 extern tree c_common_type_for_mode (enum machine_mode, int);
848 extern tree c_common_type_for_size (unsigned int, int);
849 extern tree c_common_unsigned_type (tree);
850 extern tree c_common_signed_type (tree);
851 extern tree c_common_signed_or_unsigned_type (int, tree);
852 extern tree c_common_truthvalue_conversion (tree);
853 extern void c_apply_type_quals_to_decl (int, tree);
854 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
855 extern tree c_alignof_expr (tree);
856 /* Print an error message for invalid operands to arith operation CODE.
857 NOP_EXPR is used as a special case (see truthvalue_conversion). */
858 extern void binary_op_error (enum tree_code);
859 #define my_friendly_assert(EXP, N) (void) \
860 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
862 extern tree c_expand_expr_stmt (tree);
863 /* Validate the expression after `case' and apply default promotions. */
864 extern tree check_case_value (tree);
865 extern tree fix_string_type (tree);
866 struct varray_head_tag;
867 extern void constant_expression_warning (tree);
868 extern tree convert_and_check (tree, tree);
869 extern void overflow_warning (tree);
870 extern void unsigned_conversion_warning (tree, tree);
872 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
873 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
875 /* Subroutine of build_binary_op, used for comparison operations.
876 See if the operands have both been converted from subword integer types
877 and, if so, perhaps change them both back to their original type. */
878 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
880 extern tree pointer_int_sum (enum tree_code, tree, tree);
881 extern unsigned int min_precision (tree, int);
883 /* Add qualifiers to a type, in the fashion for C. */
884 extern tree c_build_qualified_type (tree, int);
886 /* Build tree nodes and builtin functions common to both C and C++ language
888 extern void c_common_nodes_and_builtins (void);
890 extern void disable_builtin_function (const char *);
892 extern tree build_va_arg (tree, tree);
894 extern unsigned int c_common_init_options (unsigned int, const char **);
895 extern bool c_common_post_options (const char **);
896 extern bool c_common_init (void);
897 extern void c_common_finish (void);
898 extern void c_common_parse_file (int);
899 extern HOST_WIDE_INT c_common_get_alias_set (tree);
900 extern void c_register_builtin_type (tree, const char*);
901 extern bool c_promoting_integer_type_p (tree);
902 extern int self_promoting_args_p (tree);
903 extern tree strip_array_types (tree);
904 extern tree strip_pointer_operator (tree);
906 /* This is the basic parsing function. */
907 extern void c_parse_file (void);
908 /* This is misnamed, it actually performs end-of-compilation processing. */
909 extern void finish_file (void);
911 /* These macros provide convenient access to the various _STMT nodes. */
913 /* Nonzero if this statement should be considered a full-expression,
914 i.e., if temporaries created during this statement should have
915 their destructors run at the end of this statement. (In C, this
916 will always be false, since there are no destructors.) */
917 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
919 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
920 if a statement expression. */
921 #define STATEMENT_LIST_STMT_EXPR(NODE) \
922 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
924 /* WHILE_STMT accessors. These give access to the condition of the
925 while statement and the body of the while statement, respectively. */
926 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
927 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
929 /* DO_STMT accessors. These give access to the condition of the do
930 statement and the body of the do statement, respectively. */
931 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
932 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
934 /* RETURN_STMT accessors. These give the expression associated with a
935 return statement, and whether it should be ignored when expanding
936 (as opposed to inlining). */
937 #define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
939 /* EXPR_STMT accessor. This gives the expression associated with an
940 expression statement. */
941 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
943 /* FOR_STMT accessors. These give access to the init statement,
944 condition, update expression, and body of the for statement,
946 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
947 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
948 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
949 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
951 #define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
953 /* DECL_STMT accessor. This gives access to the DECL associated with
954 the given declaration statement. */
955 #define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
957 /* STMT_EXPR accessor. */
958 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
960 /* Nonzero if this statement-expression does not have an associated scope. */
961 #define STMT_EXPR_NO_SCOPE(NODE) \
962 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
964 /* COMPOUND_LITERAL_EXPR accessors. */
965 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
966 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
967 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
968 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
970 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
973 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
974 #include "c-common.def"
980 #define c_common_stmt_codes \
981 EXPR_STMT, DECL_STMT, FOR_STMT, \
982 WHILE_STMT, DO_STMT, RETURN_STMT, \
983 BREAK_STMT, CONTINUE_STMT, SWITCH_STMT
985 /* TRUE if a code represents a statement. The front end init
986 langhook should take care of initialization of this array. */
987 extern bool statement_code_p[MAX_TREE_CODES];
989 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
991 #define INIT_STATEMENT_CODES(STMT_CODES) \
994 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
995 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
996 statement_code_p[STMT_CODES[i]] = true; \
999 extern int stmts_are_full_exprs_p (void);
1000 extern int anon_aggr_type_p (tree);
1002 /* For a VAR_DECL that is an anonymous union, these are the various
1003 sub-variables that make up the anonymous union. */
1004 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1006 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1007 #define DECL_C_BIT_FIELD(NODE) \
1008 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1009 #define SET_DECL_C_BIT_FIELD(NODE) \
1010 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1011 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1012 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1014 extern void emit_local_var (tree);
1015 extern void make_rtl_for_local_static (tree);
1016 extern tree c_expand_return (tree);
1017 extern tree do_case (tree, tree);
1018 extern tree build_stmt (enum tree_code, ...);
1019 extern tree build_case_label (tree, tree, tree);
1020 extern tree build_continue_stmt (void);
1021 extern tree build_break_stmt (void);
1022 extern tree build_return_stmt (tree);
1024 extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1026 /* These functions must be defined by each front-end which implements
1027 a variant of the C language. They are used in c-common.c. */
1029 extern tree build_unary_op (enum tree_code, tree, int);
1030 extern tree build_binary_op (enum tree_code, tree, tree, int);
1031 extern int lvalue_p (tree);
1032 extern tree default_conversion (tree);
1034 /* Given two integer or real types, return the type for their sum.
1035 Given two compatible ANSI C types, returns the merged type. */
1037 extern tree common_type (tree, tree);
1039 extern tree expand_tree_builtin (tree, tree, tree);
1041 extern tree decl_constant_value (tree);
1043 /* Handle increment and decrement of boolean types. */
1044 extern tree boolean_increment (enum tree_code, tree);
1046 /* Hook currently used only by the C++ front end to reset internal state
1047 after entering or leaving a header file. */
1048 extern void extract_interface_info (void);
1050 extern int case_compare (splay_tree_key, splay_tree_key);
1052 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1054 extern void c_do_switch_warnings (splay_tree, tree);
1056 extern tree build_function_call (tree, tree);
1058 extern tree finish_label_address_expr (tree);
1060 /* Same function prototype, but the C and C++ front ends have
1061 different implementations. Used in c-common.c. */
1062 extern tree lookup_label (tree);
1064 extern int vector_types_convertible_p (tree t1, tree t2);
1066 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1068 extern int c_safe_from_p (rtx, tree);
1070 extern int c_staticp (tree);
1072 extern int c_common_unsafe_for_reeval (tree);
1074 extern void init_c_lex (void);
1076 extern void c_cpp_builtins (cpp_reader *);
1078 /* Positive if an implicit `extern "C"' scope has just been entered;
1079 negative if such a scope has just been exited. */
1080 extern GTY(()) int pending_lang_change;
1082 /* Information recorded about each file examined during compilation. */
1086 int time; /* Time spent in the file. */
1087 short interface_only; /* Flags - used only by C++ */
1088 short interface_unknown;
1091 struct c_fileinfo *get_fileinfo (const char *);
1092 extern void dump_time_statistics (void);
1094 extern bool c_dump_tree (void *, tree);
1096 extern tree c_walk_subtrees (tree*, int*, walk_tree_fn, void*, void*);
1098 extern void c_warn_unused_result (tree *);
1100 /* In c-gimplify.c */
1101 extern void c_genericize (tree);
1102 extern int c_gimplify_expr (tree *, tree *, tree *);
1103 extern tree c_build_bind_expr (tree, tree);
1105 extern void pch_init (void);
1106 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1107 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1109 extern void c_common_write_pch (void);
1110 extern void c_common_no_more_pch (void);
1111 extern void builtin_define_with_value (const char *, const char *, int);
1112 extern void c_stddef_cpp_builtins (void);
1113 extern void fe_file_change (const struct line_map *);
1114 extern void c_parse_error (const char *, enum cpp_ttype, tree);
1116 /* The following have been moved here from c-tree.h, since they're needed
1117 in the ObjC++ world, too. What is more, stub-objc.c could use a few
1119 extern tree lookup_interface (tree);
1120 extern tree is_class_name (tree);
1121 extern tree objc_is_object_ptr (tree);
1122 extern void objc_check_decl (tree);
1123 extern int objc_comptypes (tree, tree, int);
1124 extern tree objc_message_selector (void);
1125 extern tree lookup_objc_ivar (tree);
1126 extern void *get_current_scope (void);
1127 extern void objc_mark_locals_volatile (void *);
1128 extern void objc_clear_super_receiver (void);
1129 extern int objc_is_public (tree, tree);
1131 /* In c-ppoutput.c */
1132 extern void init_pp_output (FILE *);
1133 extern void preprocess_file (cpp_reader *);
1134 extern void pp_file_change (const struct line_map *);
1135 extern void pp_dir_change (cpp_reader *, const char *);
1137 #endif /* ! GCC_C_COMMON_H */