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: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
31 TREE_NEGATED_INT (in INTEGER_CST).
32 IDENTIFIER_MARKED (used by search routines).
33 SCOPE_BEGIN_P (in SCOPE_STMT)
34 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
35 NEW_FOR_SCOPE_P (in FOR_STMT)
36 ASM_INPUT_P (in ASM_STMT)
37 STMT_EXPR_NO_SCOPE (in STMT_EXPR)
38 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
39 STMT_IS_FULL_EXPR_P (in _STMT)
41 3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
42 COMPOUND_STMT_BODY_BLOCK (in COMPOUND_STMT)
43 4: SCOPE_PARTIAL_P (in SCOPE_STMT)
46 /* Reserved identifiers. This is the union of all the keywords for C,
47 C++, and Objective-C. All the type modifiers have to be in one
48 block at the beginning, because they are used as mask bits. There
49 are 27 type modifiers; if we add many more we will have to redesign
50 the mask mechanism. */
55 /* C, in empirical order of frequency. */
57 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
58 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
59 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
62 RID_COMPLEX, RID_THREAD,
65 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
68 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
71 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
72 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
73 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
74 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
78 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
79 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_PTRBASE,
80 RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
82 /* Too many ways of getting the name of a function as a string */
83 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
86 RID_BOOL, RID_WCHAR, RID_CLASS,
87 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
88 RID_TEMPLATE, RID_NULL, RID_CATCH,
89 RID_DELETE, RID_FALSE, RID_NAMESPACE,
90 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
91 RID_THIS, RID_THROW, RID_TRUE,
92 RID_TRY, RID_TYPENAME, RID_TYPEID,
96 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
99 RID_ID, RID_AT_ENCODE, RID_AT_END,
100 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
101 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
102 RID_AT_PROTOCOL, RID_AT_SELECTOR,
103 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
104 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
106 RID_AT_IMPLEMENTATION,
110 RID_FIRST_MODIFIER = RID_STATIC,
111 RID_LAST_MODIFIER = RID_ONEWAY,
113 RID_FIRST_AT = RID_AT_ENCODE,
114 RID_LAST_AT = RID_AT_IMPLEMENTATION,
115 RID_FIRST_PQ = RID_IN,
116 RID_LAST_PQ = RID_ONEWAY
119 #define OBJC_IS_AT_KEYWORD(rid) \
120 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
121 (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
123 #define OBJC_IS_PQ_KEYWORD(rid) \
124 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
125 (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
127 /* The elements of `ridpointers' are identifier nodes for the reserved
128 type names and storage classes. It is indexed by a RID_... value. */
129 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
131 /* Standard named or nameless data types of the C compiler. */
136 CTI_SIGNED_WCHAR_TYPE,
137 CTI_UNSIGNED_WCHAR_TYPE,
139 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
140 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
143 CTI_WIDEST_INT_LIT_TYPE,
144 CTI_WIDEST_UINT_LIT_TYPE,
147 CTI_WCHAR_ARRAY_TYPE,
150 CTI_CONST_STRING_TYPE,
152 /* Type for boolean expressions (bool in C++, int in C). */
155 CTI_TRUTHVALUE_FALSE,
157 CTI_DEFAULT_FUNCTION_TYPE,
159 /* These are not types, but we have to look them up all the time. */
160 CTI_FUNCTION_NAME_DECL,
161 CTI_PRETTY_FUNCTION_NAME_DECL,
162 CTI_C99_FUNCTION_NAME_DECL,
163 CTI_SAVED_FUNCTION_NAME_DECLS,
170 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
172 /* Identifier part common to the C front ends. Inherits from
173 tree_identifier, despite appearances. */
174 struct c_common_identifier GTY(())
176 struct tree_common common;
177 struct cpp_hashnode node;
180 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
181 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
182 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
183 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
184 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
185 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
186 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
187 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
188 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
189 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
191 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
192 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
193 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
195 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
196 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
197 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
198 #define string_type_node c_global_trees[CTI_STRING_TYPE]
199 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
201 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
203 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
204 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
205 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
206 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
208 /* A node for `((void) 0)'. */
209 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
211 extern GTY(()) tree c_global_trees[CTI_MAX];
213 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
214 tree for size reasons. */
215 struct sorted_fields_type GTY(())
218 tree GTY((length ("%h.len"))) elts[1];
221 /* Mark which labels are explicitly declared.
222 These may be shadowed, and may be referenced from nested functions. */
223 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
225 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
226 warning if they undergo concatenation. */
227 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
229 typedef enum c_language_kind
231 clk_c = 0, /* C90, C94 or C99 */
232 clk_objc = 1, /* clk_c with ObjC features. */
233 clk_cxx = 2, /* ANSI/ISO C++ */
234 clk_objcxx = 3 /* clk_cxx with ObjC features. */
238 /* To test for a specific language use c_language, defined by each
239 front end. For "ObjC features" or "not C++" use the macros. */
240 extern c_language_kind c_language;
242 #define c_dialect_cxx() (c_language & clk_cxx)
243 #define c_dialect_objc() (c_language & clk_objc)
245 /* Information about a statement tree. */
247 struct stmt_tree_s GTY(()) {
248 /* The last statement added to the tree. */
250 /* The type of the last expression statement. (This information is
251 needed to implement the statement-expression extension.) */
252 tree x_last_expr_type;
253 /* The last filename we recorded. */
254 const char *x_last_expr_filename;
255 /* In C++, Nonzero if we should treat statements as full
256 expressions. In particular, this variable is no-zero if at the
257 end of a statement we should destroy any temporaries created
258 during that statement. Similarly, if, at the end of a block, we
259 should destroy any local variables in this block. Normally, this
260 variable is nonzero, since those are the normal semantics of
263 However, in order to represent aggregate initialization code as
264 tree structure, we use statement-expressions. The statements
265 within the statement expression should not result in cleanups
266 being run until the entire enclosing statement is complete.
268 This flag has no effect in C. */
269 int stmts_are_full_exprs_p;
272 typedef struct stmt_tree_s *stmt_tree;
274 /* Global state pertinent to the current function. Some C dialects
275 extend this structure with additional fields. */
277 struct c_language_function GTY(()) {
278 /* While we are parsing the function, this contains information
279 about the statement-tree that we are building. */
280 struct stmt_tree_s x_stmt_tree;
281 /* The stack of SCOPE_STMTs for the current function. */
282 tree x_scope_stmt_stack;
285 /* When building a statement-tree, this is the last statement added to
288 #define last_tree (current_stmt_tree ()->x_last_stmt)
290 /* The type of the last expression-statement we have seen. */
292 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
294 /* The name of the last file we have seen. */
296 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
298 /* LAST_TREE contains the last statement parsed. These are chained
299 together through the TREE_CHAIN field, but often need to be
300 re-organized since the parse is performed bottom-up. This macro
301 makes LAST_TREE the indicated SUBSTMT of STMT. */
303 #define RECHAIN_STMTS(stmt, substmt) \
305 substmt = TREE_CHAIN (stmt); \
306 TREE_CHAIN (stmt) = NULL_TREE; \
310 /* Language-specific hooks. */
312 extern int (*lang_gimplify_stmt) (tree *, tree *);
313 extern void (*lang_expand_function_end) (void);
315 /* Callback that determines if it's ok for a function to have no
316 noreturn attribute. */
317 extern int (*lang_missing_noreturn_ok_p) (tree);
319 extern void push_file_scope (void);
320 extern void pop_file_scope (void);
321 extern int yyparse (void);
322 extern stmt_tree current_stmt_tree (void);
323 extern tree *current_scope_stmt_stack (void);
324 extern void begin_stmt_tree (tree *);
325 extern tree add_stmt (tree);
326 extern void add_decl_stmt (tree);
327 extern tree add_scope_stmt (int, int);
328 extern void finish_stmt_tree (tree *);
330 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
331 extern void prep_stmt (tree);
332 extern tree c_begin_if_stmt (void);
333 extern tree c_begin_while_stmt (void);
334 extern void c_finish_while_stmt_cond (tree, tree);
335 extern int c_expand_decl (tree);
337 extern int field_decl_cmp (const void *, const void *);
338 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
341 /* Switches common to the C front ends. */
343 /* Nonzero if prepreprocessing only. */
345 extern int flag_preprocess_only;
347 /* Zero means that faster, ...NonNil variants of objc_msgSend...
348 calls will be used in ObjC; passing nil receivers to such calls
349 will most likely result in crashes. */
350 extern int flag_nil_receivers;
352 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
353 @try, etc.) in source code. */
354 extern int flag_objc_exceptions;
356 /* Nonzero means that code generation will be altered to support
357 "zero-link" execution. This currently affects ObjC only, but may
358 affect other languages in the future. */
359 extern int flag_zero_link;
361 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
362 unit. It will inform the ObjC runtime that class definition(s) herein
363 contained are to replace one(s) previously loaded. */
364 extern int flag_replace_objc_classes;
366 /* Nonzero means don't output line number information. */
368 extern char flag_no_line_commands;
370 /* Nonzero causes -E output not to be done, but directives such as
371 #define that have side effects are still obeyed. */
373 extern char flag_no_output;
375 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
376 'N' of the command line switch. */
378 extern char flag_dump_macros;
380 /* Nonzero means pass #include lines through to the output. */
382 extern char flag_dump_includes;
384 /* The file name to which we should write a precompiled header, or
385 NULL if no header will be written in this compile. */
387 extern const char *pch_file;
389 /* Nonzero if an ISO standard was selected. It rejects macros in the
394 /* Nonzero if -undef was given. It suppresses target built-in macros
397 extern int flag_undef;
399 /* Nonzero means don't recognize the non-ANSI builtin functions. */
401 extern int flag_no_builtin;
403 /* Nonzero means don't recognize the non-ANSI builtin functions.
406 extern int flag_no_nonansi_builtin;
408 /* Nonzero means give `double' the same size as `float'. */
410 extern int flag_short_double;
412 /* Nonzero means give `wchar_t' the same size as `short'. */
414 extern int flag_short_wchar;
416 /* Nonzero means allow Microsoft extensions without warnings or errors. */
417 extern int flag_ms_extensions;
419 /* Nonzero means don't recognize the keyword `asm'. */
421 extern int flag_no_asm;
423 /* Nonzero means give string constants the type `const char *', as mandated
426 extern int flag_const_strings;
428 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
430 extern int flag_signed_bitfields;
431 extern int explicit_flag_signed_bitfields;
433 /* Nonzero means warn about pointer casts that can drop a type qualifier
434 from the pointer target type. */
436 extern int warn_cast_qual;
438 /* Warn about functions which might be candidates for format attributes. */
440 extern int warn_missing_format_attribute;
442 /* Nonzero means warn about sizeof(function) or addition/subtraction
443 of function pointers. */
445 extern int warn_pointer_arith;
447 /* Nonzero means warn for any global function def
448 without separate previous prototype decl. */
450 extern int warn_missing_prototypes;
452 /* Warn if adding () is suggested. */
454 extern int warn_parentheses;
456 /* Warn if initializer is not completely bracketed. */
458 extern int warn_missing_braces;
460 /* Warn about comparison of signed and unsigned values.
461 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
463 extern int warn_sign_compare;
465 /* Nonzero means warn about usage of long long when `-pedantic'. */
467 extern int warn_long_long;
469 /* Nonzero means warn about deprecated conversion from string constant to
472 extern int warn_write_strings;
474 /* Nonzero means warn about multiple (redundant) decls for the same single
475 variable or function. */
477 extern int warn_redundant_decls;
479 /* Warn about testing equality of floating point numbers. */
481 extern int warn_float_equal;
483 /* Warn about a subscript that has type char. */
485 extern int warn_char_subscripts;
487 /* Warn if a type conversion is done that might have confusing results. */
489 extern int warn_conversion;
491 /* Warn about #pragma directives that are not recognized. */
493 extern int warn_unknown_pragmas; /* Tri state variable. */
495 /* Warn about format/argument anomalies in calls to formatted I/O functions
496 (*printf, *scanf, strftime, strfmon, etc.). */
498 extern int warn_format;
500 /* Warn about Y2K problems with strftime formats. */
502 extern int warn_format_y2k;
504 /* Warn about excess arguments to formats. */
506 extern int warn_format_extra_args;
508 /* Warn about zero-length formats. */
510 extern int warn_format_zero_length;
512 /* Warn about non-literal format arguments. */
514 extern int warn_format_nonliteral;
516 /* Warn about possible security problems with calls to format functions. */
518 extern int warn_format_security;
521 /* C/ObjC language option variables. */
524 /* Nonzero means message about use of implicit function declarations;
525 1 means warning; 2 means error. */
527 extern int mesg_implicit_function_declaration;
529 /* Nonzero means allow type mismatches in conditional expressions;
530 just make their values `void'. */
532 extern int flag_cond_mismatch;
534 /* Nonzero means enable C89 Amendment 1 features. */
536 extern int flag_isoc94;
538 /* Nonzero means use the ISO C99 dialect of C. */
540 extern int flag_isoc99;
542 /* Nonzero means that we have builtin functions, and main is an int. */
544 extern int flag_hosted;
546 /* Nonzero means warn when casting a function call to a type that does
547 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
548 when there is no previous declaration of sqrt or malloc. */
550 extern int warn_bad_function_cast;
552 /* Warn about traditional constructs whose meanings changed in ANSI C. */
554 extern int warn_traditional;
556 /* Nonzero means warn for a declaration found after a statement. */
558 extern int warn_declaration_after_statement;
560 /* Nonzero means warn for non-prototype function decls
561 or non-prototyped defs without previous prototype. */
563 extern int warn_strict_prototypes;
565 /* Nonzero means warn for any global function def
566 without separate previous decl. */
568 extern int warn_missing_declarations;
570 /* Nonzero means warn about extern declarations of objects not at
571 file-scope level and about *all* declarations of functions (whether
572 extern or static) not at file-scope level. Note that we exclude
573 implicit function declarations. To get warnings about those, use
576 extern int warn_nested_externs;
578 /* Warn if main is suspicious. */
580 extern int warn_main;
582 /* Nonzero means warn about possible violations of sequence point rules. */
584 extern int warn_sequence_point;
586 /* Nonzero means warn about uninitialized variable when it is initialized with itself.
587 For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
589 extern int warn_init_self;
592 /* Nonzero means to warn about compile-time division by zero. */
593 extern int warn_div_by_zero;
595 /* Nonzero means warn about use of implicit int. */
597 extern int warn_implicit_int;
599 /* Warn about NULL being passed to argument slots marked as requiring
602 extern int warn_nonnull;
604 /* Warn about old-style parameter declaration. */
606 extern int warn_old_style_definition;
609 /* ObjC language option variables. */
612 /* Open and close the file for outputting class declarations, if
615 extern int flag_gen_declaration;
617 /* Generate code for GNU or NeXT runtime environment. */
619 extern int flag_next_runtime;
621 /* Tells the compiler that this is a special run. Do not perform any
622 compiling, instead we are to test some platform dependent features
623 and output a C header file with appropriate definitions. */
625 extern int print_struct_values;
627 /* ???. Undocumented. */
629 extern const char *constant_string_class_name;
631 /* Warn if multiple methods are seen for the same selector, but with
632 different argument types. Performs the check on the whole selector
633 table at the end of compilation. */
635 extern int warn_selector;
637 /* Warn if a @selector() is found, and no method with that selector
638 has been previously declared. The check is done on each
639 @selector() as soon as it is found - so it warns about forward
642 extern int warn_undeclared_selector;
644 /* Warn if methods required by a protocol are not implemented in the
645 class adopting it. When turned off, methods inherited to that
646 class are also considered implemented. */
648 extern int warn_protocol;
651 /* C++ language option variables. */
654 /* Nonzero means don't recognize any extension keywords. */
656 extern int flag_no_gnu_keywords;
658 /* Nonzero means do emit exported implementations of functions even if
659 they can be inlined. */
661 extern int flag_implement_inlines;
663 /* Nonzero means that implicit instantiations will be emitted if needed. */
665 extern int flag_implicit_templates;
667 /* Nonzero means that implicit instantiations of inline templates will be
668 emitted if needed, even if instantiations of non-inline templates
671 extern int flag_implicit_inline_templates;
673 /* Nonzero means generate separate instantiation control files and
674 juggle them at link time. */
676 extern int flag_use_repository;
678 /* Nonzero if we want to issue diagnostics that the standard says are not
681 extern int flag_optional_diags;
683 /* Nonzero means we should attempt to elide constructors when possible. */
685 extern int flag_elide_constructors;
687 /* Nonzero means that member functions defined in class scope are
688 inline by default. */
690 extern int flag_default_inline;
692 /* Controls whether compiler generates 'type descriptor' that give
693 run-time type information. */
695 extern int flag_rtti;
697 /* Nonzero if we want to conserve space in the .o files. We do this
698 by putting uninitialized data and runtime initialized data into
699 .common instead of .data at the expense of not flagging multiple
702 extern int flag_conserve_space;
704 /* Nonzero if we want to obey access control semantics. */
706 extern int flag_access_control;
708 /* Nonzero if we want to check the return value of new and avoid calling
709 constructors if it is a null pointer. */
711 extern int flag_check_new;
713 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
714 initialization variables.
715 0: Old rules, set by -fno-for-scope.
716 2: New ISO rules, set by -ffor-scope.
717 1: Try to implement new ISO rules, but with backup compatibility
718 (and warnings). This is the default, for now. */
720 extern int flag_new_for_scope;
722 /* Nonzero if we want to emit defined symbols with common-like linkage as
723 weak symbols where possible, in order to conform to C++ semantics.
724 Otherwise, emit them as local symbols. */
726 extern int flag_weak;
728 /* 0 means we want the preprocessor to not emit line directives for
729 the current working directory. 1 means we want it to do it. -1
730 means we should decide depending on whether debugging information
731 is being emitted or not. */
733 extern int flag_working_directory;
735 /* Nonzero to use __cxa_atexit, rather than atexit, to register
736 destructors for local statics and global objects. */
738 extern int flag_use_cxa_atexit;
740 /* Nonzero means make the default pedwarns warnings instead of errors.
741 The value of this flag is ignored if -pedantic is specified. */
743 extern int flag_permissive;
745 /* Nonzero means to implement standard semantics for exception
746 specifications, calling unexpected if an exception is thrown that
747 doesn't match the specification. Zero means to treat them as
748 assertions and optimize accordingly, but not check them. */
750 extern int flag_enforce_eh_specs;
752 /* Nonzero means warn about things that will change when compiling
753 with an ABI-compliant compiler. */
757 /* Nonzero means warn about invalid uses of offsetof. */
759 extern int warn_invalid_offsetof;
761 /* Nonzero means warn about implicit declarations. */
763 extern int warn_implicit;
765 /* Nonzero means warn when all ctors or dtors are private, and the class
768 extern int warn_ctor_dtor_privacy;
770 /* Nonzero means warn in function declared in derived class has the
771 same name as a virtual in the base class, but fails to match the
772 type signature of any virtual function in the base class. */
774 extern int warn_overloaded_virtual;
776 /* Nonzero means warn when declaring a class that has a non virtual
777 destructor, when it really ought to have a virtual one. */
779 extern int warn_nonvdtor;
781 /* Nonzero means warn when the compiler will reorder code. */
783 extern int warn_reorder;
785 /* Nonzero means warn when synthesis behavior differs from Cfront's. */
787 extern int warn_synth;
789 /* Nonzero means warn when we convert a pointer to member function
790 into a pointer to (void or function). */
792 extern int warn_pmf2ptr;
794 /* Nonzero means warn about violation of some Effective C++ style rules. */
796 extern int warn_ecpp;
798 /* Nonzero means warn where overload resolution chooses a promotion from
799 unsigned to signed over a conversion to an unsigned of the same size. */
801 extern int warn_sign_promo;
803 /* Nonzero means warn when an old-style cast is used. */
805 extern int warn_old_style_cast;
807 /* Nonzero means warn when non-templatized friend functions are
808 declared within a template */
810 extern int warn_nontemplate_friend;
812 /* Nonzero means complain about deprecated features. */
814 extern int warn_deprecated;
816 /* Maximum template instantiation depth. This limit is rather
817 arbitrary, but it exists to limit the time it takes to notice
818 infinite template instantiations. */
820 extern int max_tinst_depth;
822 /* Nonzero means the expression being parsed will never be evaluated.
823 This is a count, since unevaluated expressions can nest. */
825 extern int skip_evaluation;
827 /* C types are partitioned into three subsets: object, function, and
829 #define C_TYPE_OBJECT_P(type) \
830 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
832 #define C_TYPE_INCOMPLETE_P(type) \
833 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
835 #define C_TYPE_FUNCTION_P(type) \
836 (TREE_CODE (type) == FUNCTION_TYPE)
838 /* For convenience we define a single macro to identify the class of
839 object or incomplete types. */
840 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
841 (!C_TYPE_FUNCTION_P (type))
843 /* Record in each node resulting from a binary operator
844 what operator was specified for it. */
845 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
847 /* Attribute table common to the C front ends. */
848 extern const struct attribute_spec c_common_attribute_table[];
849 extern const struct attribute_spec c_common_format_attribute_table[];
851 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
852 ID is the identifier to use, NAME is the string.
853 TYPE_DEP indicates whether it depends on type of the function or not
854 (i.e. __PRETTY_FUNCTION__). */
856 extern tree (*make_fname_decl) (tree, int);
858 extern tree identifier_global_value (tree);
859 extern void record_builtin_type (enum rid, const char *, tree);
860 extern tree build_void_list_node (void);
861 extern void start_fname_decls (void);
862 extern void finish_fname_decls (void);
863 extern const char *fname_as_string (int);
864 extern tree fname_decl (unsigned, tree);
866 extern void check_function_arguments (tree, tree);
867 extern void check_function_arguments_recurse (void (*)
869 unsigned HOST_WIDE_INT),
871 unsigned HOST_WIDE_INT);
872 extern void check_function_format (int *, tree, tree);
873 extern void set_Wformat (int);
874 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
875 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
876 extern int c_common_handle_option (size_t code, const char *arg, int value);
877 extern bool c_common_missing_argument (const char *opt, size_t code);
878 extern tree c_common_type_for_mode (enum machine_mode, int);
879 extern tree c_common_type_for_size (unsigned int, int);
880 extern tree c_common_unsigned_type (tree);
881 extern tree c_common_signed_type (tree);
882 extern tree c_common_signed_or_unsigned_type (int, tree);
883 extern tree c_common_truthvalue_conversion (tree);
884 extern void c_apply_type_quals_to_decl (int, tree);
885 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
886 extern tree c_alignof_expr (tree);
887 /* Print an error message for invalid operands to arith operation CODE.
888 NOP_EXPR is used as a special case (see truthvalue_conversion). */
889 extern void binary_op_error (enum tree_code);
890 #define my_friendly_assert(EXP, N) (void) \
891 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
893 extern tree c_expand_expr_stmt (tree);
894 extern void c_expand_start_cond (tree, int, tree);
895 extern void c_finish_then (void);
896 extern void c_expand_start_else (void);
897 extern void c_finish_else (void);
898 extern void c_expand_end_cond (void);
899 /* Validate the expression after `case' and apply default promotions. */
900 extern tree check_case_value (tree);
901 extern tree fix_string_type (tree);
902 struct varray_head_tag;
903 extern void constant_expression_warning (tree);
904 extern tree convert_and_check (tree, tree);
905 extern void overflow_warning (tree);
906 extern void unsigned_conversion_warning (tree, tree);
908 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
909 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
911 /* Subroutine of build_binary_op, used for comparison operations.
912 See if the operands have both been converted from subword integer types
913 and, if so, perhaps change them both back to their original type. */
914 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
916 extern tree pointer_int_sum (enum tree_code, tree, tree);
917 extern unsigned int min_precision (tree, int);
919 /* Add qualifiers to a type, in the fashion for C. */
920 extern tree c_build_qualified_type (tree, int);
922 /* Build tree nodes and builtin functions common to both C and C++ language
924 extern void c_common_nodes_and_builtins (void);
926 extern void disable_builtin_function (const char *);
928 extern tree build_va_arg (tree, tree);
930 extern unsigned int c_common_init_options (unsigned int, const char **);
931 extern bool c_common_post_options (const char **);
932 extern bool c_common_init (void);
933 extern void c_common_finish (void);
934 extern void c_common_parse_file (int);
935 extern HOST_WIDE_INT c_common_get_alias_set (tree);
936 extern void c_register_builtin_type (tree, const char*);
937 extern bool c_promoting_integer_type_p (tree);
938 extern int self_promoting_args_p (tree);
939 extern tree strip_array_types (tree);
940 extern tree strip_pointer_operator (tree);
942 /* This is the basic parsing function. */
943 extern void c_parse_file (void);
944 /* This is misnamed, it actually performs end-of-compilation processing. */
945 extern void finish_file (void);
947 /* These macros provide convenient access to the various _STMT nodes. */
949 /* Nonzero if this statement should be considered a full-expression,
950 i.e., if temporaries created during this statement should have
951 their destructors run at the end of this statement. (In C, this
952 will always be false, since there are no destructors.) */
953 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
955 /* IF_STMT accessors. These give access to the condition of the if
956 statement, the then block of the if statement, and the else block
957 of the if statement if it exists. */
958 #define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
959 #define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
960 #define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
962 /* WHILE_STMT accessors. These give access to the condition of the
963 while statement and the body of the while statement, respectively. */
964 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
965 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
967 /* DO_STMT accessors. These give access to the condition of the do
968 statement and the body of the do statement, respectively. */
969 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
970 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
972 /* RETURN_STMT accessors. These give the expression associated with a
973 return statement, and whether it should be ignored when expanding
974 (as opposed to inlining). */
975 #define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
977 /* EXPR_STMT accessor. This gives the expression associated with an
978 expression statement. */
979 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
981 /* FOR_STMT accessors. These give access to the init statement,
982 condition, update expression, and body of the for statement,
984 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
985 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
986 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
987 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
989 #define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
990 #define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
992 /* True for goto created artificially by the compiler. */
993 #define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
995 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
996 statements associated with a compound statement. The result is the
997 first statement in the list. Succeeding nodes can be accessed by
998 calling TREE_CHAIN on a node in the list. */
999 #define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1001 /* DECL_STMT accessor. This gives access to the DECL associated with
1002 the given declaration statement. */
1003 #define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1005 /* STMT_EXPR accessor. */
1006 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1008 /* Nonzero if this statement-expression does not have an associated scope. */
1009 #define STMT_EXPR_NO_SCOPE(NODE) \
1010 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1012 /* LABEL_STMT accessor. This gives access to the label associated with
1013 the given label statement. */
1014 #define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1016 /* COMPOUND_LITERAL_EXPR accessors. */
1017 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
1018 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1019 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
1020 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1022 /* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
1023 #define SCOPE_BEGIN_P(NODE) \
1024 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1026 /* Nonzero if this SCOPE_STMT is for the end of a scope. */
1027 #define SCOPE_END_P(NODE) \
1028 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1030 /* The BLOCK containing the declarations contained in this scope. */
1031 #define SCOPE_STMT_BLOCK(NODE) \
1032 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1034 /* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
1035 #define SCOPE_NULLIFIED_P(NODE) \
1036 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1038 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1039 which should be treated as non-existent from the point of view of
1040 running cleanup actions. */
1041 #define SCOPE_NO_CLEANUPS_P(NODE) \
1042 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1044 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1052 there is (implicitly) a new scope after `l', even though there are
1053 no curly braces. In particular, when we hit the goto, we must
1054 destroy s2 and then re-construct it. For the implicit scope,
1055 SCOPE_PARTIAL_P will be set. */
1056 #define SCOPE_PARTIAL_P(NODE) \
1057 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1059 /* The VAR_DECL to clean up in a CLEANUP_STMT. */
1060 #define CLEANUP_DECL(NODE) \
1061 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1062 /* The cleanup to run in a CLEANUP_STMT. */
1063 #define CLEANUP_EXPR(NODE) \
1064 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1066 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1067 initialization variables. */
1068 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1070 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1073 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1074 #include "c-common.def"
1080 #define c_common_stmt_codes \
1081 CLEANUP_STMT, EXPR_STMT, COMPOUND_STMT, \
1082 DECL_STMT, IF_STMT, FOR_STMT, \
1083 WHILE_STMT, DO_STMT, RETURN_STMT, \
1084 BREAK_STMT, CONTINUE_STMT, SCOPE_STMT, \
1085 SWITCH_STMT, GOTO_STMT, LABEL_STMT, \
1086 ASM_STMT, CASE_LABEL
1088 /* TRUE if a code represents a statement. The front end init
1089 langhook should take care of initialization of this array. */
1090 extern bool statement_code_p[MAX_TREE_CODES];
1092 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1094 #define INIT_STATEMENT_CODES(STMT_CODES) \
1097 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
1098 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
1099 statement_code_p[STMT_CODES[i]] = true; \
1102 extern int stmts_are_full_exprs_p (void);
1103 extern int anon_aggr_type_p (tree);
1105 /* For a VAR_DECL that is an anonymous union, these are the various
1106 sub-variables that make up the anonymous union. */
1107 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1109 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1110 #define DECL_C_BIT_FIELD(NODE) \
1111 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1112 #define SET_DECL_C_BIT_FIELD(NODE) \
1113 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1114 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1115 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1117 extern void emit_local_var (tree);
1118 extern void make_rtl_for_local_static (tree);
1119 extern tree c_expand_return (tree);
1120 extern tree do_case (tree, tree);
1121 extern tree build_stmt (enum tree_code, ...);
1122 extern tree build_case_label (tree, tree, tree);
1123 extern tree build_continue_stmt (void);
1124 extern tree build_break_stmt (void);
1125 extern tree build_return_stmt (tree);
1127 #define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
1129 /* Used by the C++ frontend to mark the block around the member
1130 initializers and cleanups. */
1131 #define COMPOUND_STMT_BODY_BLOCK(NODE) TREE_LANG_FLAG_3 (NODE)
1133 extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1135 /* These functions must be defined by each front-end which implements
1136 a variant of the C language. They are used in c-common.c. */
1138 extern tree build_unary_op (enum tree_code, tree, int);
1139 extern tree build_binary_op (enum tree_code, tree, tree, int);
1140 extern int lvalue_p (tree);
1141 extern tree default_conversion (tree);
1143 /* Given two integer or real types, return the type for their sum.
1144 Given two compatible ANSI C types, returns the merged type. */
1146 extern tree common_type (tree, tree);
1148 extern tree expand_tree_builtin (tree, tree, tree);
1150 extern tree decl_constant_value (tree);
1152 /* Handle increment and decrement of boolean types. */
1153 extern tree boolean_increment (enum tree_code, tree);
1155 /* Hook currently used only by the C++ front end to reset internal state
1156 after entering or leaving a header file. */
1157 extern void extract_interface_info (void);
1159 extern int case_compare (splay_tree_key, splay_tree_key);
1161 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1163 extern void c_do_switch_warnings (splay_tree, tree);
1165 extern tree build_function_call (tree, tree);
1167 extern tree finish_label_address_expr (tree);
1169 /* Same function prototype, but the C and C++ front ends have
1170 different implementations. Used in c-common.c. */
1171 extern tree lookup_label (tree);
1173 extern int vector_types_convertible_p (tree t1, tree t2);
1175 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1177 extern int c_safe_from_p (rtx, tree);
1179 extern int c_staticp (tree);
1181 extern int c_common_unsafe_for_reeval (tree);
1183 extern void init_c_lex (void);
1185 extern void c_cpp_builtins (cpp_reader *);
1187 /* Positive if an implicit `extern "C"' scope has just been entered;
1188 negative if such a scope has just been exited. */
1189 extern GTY(()) int pending_lang_change;
1191 /* Information recorded about each file examined during compilation. */
1195 int time; /* Time spent in the file. */
1196 short interface_only; /* Flags - used only by C++ */
1197 short interface_unknown;
1200 struct c_fileinfo *get_fileinfo (const char *);
1201 extern void dump_time_statistics (void);
1203 extern bool c_dump_tree (void *, tree);
1205 extern int c_gimplify_expr (tree *, tree *, tree *);
1206 extern tree c_walk_subtrees (tree*, int*, walk_tree_fn, void*, void*);
1207 extern int c_tree_chain_matters_p (tree);
1209 extern void c_warn_unused_result (tree *);
1211 /* In c-simplify.c */
1212 extern void c_genericize (tree);
1213 extern int c_gimplify_stmt (tree *);
1214 extern tree stmt_expr_last_stmt (tree);
1216 extern void pch_init (void);
1217 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1218 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1220 extern void c_common_write_pch (void);
1221 extern void c_common_no_more_pch (void);
1222 extern void builtin_define_with_value (const char *, const char *, int);
1223 extern void c_stddef_cpp_builtins (void);
1224 extern void fe_file_change (const struct line_map *);
1225 extern void c_parse_error (const char *, enum cpp_ttype, tree);
1227 /* The following have been moved here from c-tree.h, since they're needed
1228 in the ObjC++ world, too. What is more, stub-objc.c could use a few
1230 extern tree lookup_interface (tree);
1231 extern tree is_class_name (tree);
1232 extern tree objc_is_object_ptr (tree);
1233 extern void objc_check_decl (tree);
1234 extern int objc_comptypes (tree, tree, int);
1235 extern tree objc_message_selector (void);
1236 extern tree lookup_objc_ivar (tree);
1237 extern void *get_current_scope (void);
1238 extern void objc_mark_locals_volatile (void *);
1239 extern int objc_is_public (tree, tree);
1241 /* In c-ppoutput.c */
1242 extern void init_pp_output (FILE *);
1243 extern void preprocess_file (cpp_reader *);
1244 extern void pp_file_change (const struct line_map *);
1245 extern void pp_dir_change (cpp_reader *, const char *);
1247 #endif /* ! GCC_C_COMMON_H */