* optabs.c (no_conflict_move_test): Check if a result of a
[official-gcc.git] / gcc / c-common.h
blob4e8485a061af38fa25d4d84a88777cddb7c6b0eb
1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005 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
10 version.
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
15 for more details.
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, 51 Franklin Street, Fifth Floor, Boston, MA
20 02110-1301, USA. */
22 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
25 #include "splay-tree.h"
26 #include "cpplib.h"
27 #include "ggc.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 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
34 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
35 2: unused
36 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
37 4: unused
40 /* Reserved identifiers. This is the union of all the keywords for C,
41 C++, and Objective-C. All the type modifiers have to be in one
42 block at the beginning, because they are used as mask bits. There
43 are 27 type modifiers; if we add many more we will have to redesign
44 the mask mechanism. */
46 enum rid
48 /* Modifiers: */
49 /* C, in empirical order of frequency. */
50 RID_STATIC = 0,
51 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
52 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
53 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
55 /* C extensions */
56 RID_COMPLEX, RID_THREAD,
58 /* C++ */
59 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
61 /* ObjC */
62 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
64 /* C */
65 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
66 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
67 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
68 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
69 RID_SIZEOF,
71 /* C extensions */
72 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
73 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
74 RID_TYPES_COMPATIBLE_P,
76 /* Too many ways of getting the name of a function as a string */
77 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
79 /* C++ */
80 RID_BOOL, RID_WCHAR, RID_CLASS,
81 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
82 RID_TEMPLATE, RID_NULL, RID_CATCH,
83 RID_DELETE, RID_FALSE, RID_NAMESPACE,
84 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
85 RID_THIS, RID_THROW, RID_TRUE,
86 RID_TRY, RID_TYPENAME, RID_TYPEID,
87 RID_USING,
89 /* casts */
90 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
92 /* Objective-C */
93 RID_AT_ENCODE, RID_AT_END,
94 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
95 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
96 RID_AT_PROTOCOL, RID_AT_SELECTOR,
97 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
98 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
99 RID_AT_INTERFACE,
100 RID_AT_IMPLEMENTATION,
102 RID_MAX,
104 RID_FIRST_MODIFIER = RID_STATIC,
105 RID_LAST_MODIFIER = RID_ONEWAY,
107 RID_FIRST_AT = RID_AT_ENCODE,
108 RID_LAST_AT = RID_AT_IMPLEMENTATION,
109 RID_FIRST_PQ = RID_IN,
110 RID_LAST_PQ = RID_ONEWAY
113 #define OBJC_IS_AT_KEYWORD(rid) \
114 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
115 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
117 #define OBJC_IS_PQ_KEYWORD(rid) \
118 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
119 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
121 /* The elements of `ridpointers' are identifier nodes for the reserved
122 type names and storage classes. It is indexed by a RID_... value. */
123 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
125 /* Standard named or nameless data types of the C compiler. */
127 enum c_tree_index
129 CTI_WCHAR_TYPE,
130 CTI_SIGNED_WCHAR_TYPE,
131 CTI_UNSIGNED_WCHAR_TYPE,
132 CTI_WINT_TYPE,
133 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
134 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
135 CTI_INTMAX_TYPE,
136 CTI_UINTMAX_TYPE,
137 CTI_WIDEST_INT_LIT_TYPE,
138 CTI_WIDEST_UINT_LIT_TYPE,
140 CTI_CHAR_ARRAY_TYPE,
141 CTI_WCHAR_ARRAY_TYPE,
142 CTI_INT_ARRAY_TYPE,
143 CTI_STRING_TYPE,
144 CTI_CONST_STRING_TYPE,
146 /* Type for boolean expressions (bool in C++, int in C). */
147 CTI_TRUTHVALUE_TYPE,
148 CTI_TRUTHVALUE_TRUE,
149 CTI_TRUTHVALUE_FALSE,
151 CTI_DEFAULT_FUNCTION_TYPE,
153 /* These are not types, but we have to look them up all the time. */
154 CTI_FUNCTION_NAME_DECL,
155 CTI_PRETTY_FUNCTION_NAME_DECL,
156 CTI_C99_FUNCTION_NAME_DECL,
157 CTI_SAVED_FUNCTION_NAME_DECLS,
159 CTI_VOID_ZERO,
161 CTI_NULL,
163 CTI_MAX
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 /* The node for C++ `__null'. */
208 #define null_node c_global_trees[CTI_NULL]
210 extern GTY(()) tree c_global_trees[CTI_MAX];
212 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
213 tree for size reasons. */
214 struct sorted_fields_type GTY(())
216 int len;
217 tree GTY((length ("%h.len"))) elts[1];
220 /* Mark which labels are explicitly declared.
221 These may be shadowed, and may be referenced from nested functions. */
222 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
224 typedef enum c_language_kind
226 clk_c = 0, /* C90, C94 or C99 */
227 clk_objc = 1, /* clk_c with ObjC features. */
228 clk_cxx = 2, /* ANSI/ISO C++ */
229 clk_objcxx = 3 /* clk_cxx with ObjC features. */
231 c_language_kind;
233 /* To test for a specific language use c_language, defined by each
234 front end. For "ObjC features" or "not C++" use the macros. */
235 extern c_language_kind c_language;
237 #define c_dialect_cxx() (c_language & clk_cxx)
238 #define c_dialect_objc() (c_language & clk_objc)
240 /* Information about a statement tree. */
242 struct stmt_tree_s GTY(()) {
243 /* The current statement list being collected. */
244 tree x_cur_stmt_list;
246 /* In C++, Nonzero if we should treat statements as full
247 expressions. In particular, this variable is no-zero if at the
248 end of a statement we should destroy any temporaries created
249 during that statement. Similarly, if, at the end of a block, we
250 should destroy any local variables in this block. Normally, this
251 variable is nonzero, since those are the normal semantics of
252 C++.
254 However, in order to represent aggregate initialization code as
255 tree structure, we use statement-expressions. The statements
256 within the statement expression should not result in cleanups
257 being run until the entire enclosing statement is complete.
259 This flag has no effect in C. */
260 int stmts_are_full_exprs_p;
263 typedef struct stmt_tree_s *stmt_tree;
265 /* Global state pertinent to the current function. Some C dialects
266 extend this structure with additional fields. */
268 struct c_language_function GTY(()) {
269 /* While we are parsing the function, this contains information
270 about the statement-tree that we are building. */
271 struct stmt_tree_s x_stmt_tree;
274 /* When building a statement-tree, this is the current statement list
275 being collected. It's TREE_CHAIN is a back-pointer to the previous
276 statement list. */
278 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
280 /* Language-specific hooks. */
282 /* Callback that determines if it's ok for a function to have no
283 noreturn attribute. */
284 extern int (*lang_missing_noreturn_ok_p) (tree);
286 /* If non-NULL, this function is called after a precompile header file
287 is loaded. */
288 extern void (*lang_post_pch_load) (void);
290 extern void push_file_scope (void);
291 extern void pop_file_scope (void);
292 extern int yyparse (void);
293 extern stmt_tree current_stmt_tree (void);
294 extern tree push_stmt_list (void);
295 extern tree pop_stmt_list (tree);
296 extern tree add_stmt (tree);
297 extern void push_cleanup (tree, tree, bool);
299 extern int c_expand_decl (tree);
301 extern int field_decl_cmp (const void *, const void *);
302 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
303 void *);
304 extern bool has_c_linkage (tree decl);
306 /* Switches common to the C front ends. */
308 /* Nonzero if prepreprocessing only. */
310 extern int flag_preprocess_only;
312 /* Zero means that faster, ...NonNil variants of objc_msgSend...
313 calls will be used in ObjC; passing nil receivers to such calls
314 will most likely result in crashes. */
315 extern int flag_nil_receivers;
317 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
318 @try, etc.) in source code. */
319 extern int flag_objc_exceptions;
321 /* Nonzero means that we generate NeXT setjmp based exceptions. */
322 extern int flag_objc_sjlj_exceptions;
324 /* Nonzero means that code generation will be altered to support
325 "zero-link" execution. This currently affects ObjC only, but may
326 affect other languages in the future. */
327 extern int flag_zero_link;
329 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
330 unit. It will inform the ObjC runtime that class definition(s) herein
331 contained are to replace one(s) previously loaded. */
332 extern int flag_replace_objc_classes;
334 /* Nonzero means don't output line number information. */
336 extern char flag_no_line_commands;
338 /* Nonzero causes -E output not to be done, but directives such as
339 #define that have side effects are still obeyed. */
341 extern char flag_no_output;
343 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
344 'N' of the command line switch. */
346 extern char flag_dump_macros;
348 /* Nonzero means pass #include lines through to the output. */
350 extern char flag_dump_includes;
352 /* Nonzero means process PCH files while preprocessing. */
354 extern bool flag_pch_preprocess;
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
362 user's namespace. */
364 extern int flag_iso;
366 /* Nonzero if -undef was given. It suppresses target built-in macros
367 and assertions. */
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.
376 -ansi sets this. */
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
396 by the standard. */
398 extern int flag_const_strings;
400 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
402 extern int flag_signed_bitfields;
404 /* Nonzero means warn about deprecated conversion from string constant to
405 `char *'. */
407 extern int warn_write_strings;
409 /* Warn about #pragma directives that are not recognized. */
411 extern int warn_unknown_pragmas; /* Tri state variable. */
413 /* Warn about format/argument anomalies in calls to formatted I/O functions
414 (*printf, *scanf, strftime, strfmon, etc.). */
416 extern int warn_format;
419 /* C/ObjC language option variables. */
422 /* Nonzero means allow type mismatches in conditional expressions;
423 just make their values `void'. */
425 extern int flag_cond_mismatch;
427 /* Nonzero means enable C89 Amendment 1 features. */
429 extern int flag_isoc94;
431 /* Nonzero means use the ISO C99 dialect of C. */
433 extern int flag_isoc99;
435 /* Nonzero means that we have builtin functions, and main is an int. */
437 extern int flag_hosted;
439 /* Warn if main is suspicious. */
441 extern int warn_main;
444 /* ObjC language option variables. */
447 /* Open and close the file for outputting class declarations, if
448 requested (ObjC). */
450 extern int flag_gen_declaration;
452 /* Tells the compiler that this is a special run. Do not perform any
453 compiling, instead we are to test some platform dependent features
454 and output a C header file with appropriate definitions. */
456 extern int print_struct_values;
458 /* ???. Undocumented. */
460 extern const char *constant_string_class_name;
463 /* C++ language option variables. */
466 /* Nonzero means don't recognize any extension keywords. */
468 extern int flag_no_gnu_keywords;
470 /* Nonzero means do emit exported implementations of functions even if
471 they can be inlined. */
473 extern int flag_implement_inlines;
475 /* Nonzero means that implicit instantiations will be emitted if needed. */
477 extern int flag_implicit_templates;
479 /* Nonzero means that implicit instantiations of inline templates will be
480 emitted if needed, even if instantiations of non-inline templates
481 aren't. */
483 extern int flag_implicit_inline_templates;
485 /* Nonzero means generate separate instantiation control files and
486 juggle them at link time. */
488 extern int flag_use_repository;
490 /* Nonzero if we want to issue diagnostics that the standard says are not
491 required. */
493 extern int flag_optional_diags;
495 /* Nonzero means we should attempt to elide constructors when possible. */
497 extern int flag_elide_constructors;
499 /* Nonzero means that member functions defined in class scope are
500 inline by default. */
502 extern int flag_default_inline;
504 /* Controls whether compiler generates 'type descriptor' that give
505 run-time type information. */
507 extern int flag_rtti;
509 /* Nonzero if we want to conserve space in the .o files. We do this
510 by putting uninitialized data and runtime initialized data into
511 .common instead of .data at the expense of not flagging multiple
512 definitions. */
514 extern int flag_conserve_space;
516 /* Nonzero if we want to obey access control semantics. */
518 extern int flag_access_control;
520 /* Nonzero if we want to check the return value of new and avoid calling
521 constructors if it is a null pointer. */
523 extern int flag_check_new;
525 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
526 initialization variables.
527 0: Old rules, set by -fno-for-scope.
528 2: New ISO rules, set by -ffor-scope.
529 1: Try to implement new ISO rules, but with backup compatibility
530 (and warnings). This is the default, for now. */
532 extern int flag_new_for_scope;
534 /* Nonzero if we want to emit defined symbols with common-like linkage as
535 weak symbols where possible, in order to conform to C++ semantics.
536 Otherwise, emit them as local symbols. */
538 extern int flag_weak;
540 /* 0 means we want the preprocessor to not emit line directives for
541 the current working directory. 1 means we want it to do it. -1
542 means we should decide depending on whether debugging information
543 is being emitted or not. */
545 extern int flag_working_directory;
547 /* Nonzero to use __cxa_atexit, rather than atexit, to register
548 destructors for local statics and global objects. */
550 extern int flag_use_cxa_atexit;
552 /* Nonzero means make the default pedwarns warnings instead of errors.
553 The value of this flag is ignored if -pedantic is specified. */
555 extern int flag_permissive;
557 /* Nonzero means to implement standard semantics for exception
558 specifications, calling unexpected if an exception is thrown that
559 doesn't match the specification. Zero means to treat them as
560 assertions and optimize accordingly, but not check them. */
562 extern int flag_enforce_eh_specs;
564 /* Nonzero (the default) means to generate thread-safe code for
565 initializing local statics. */
567 extern int flag_threadsafe_statics;
569 /* Nonzero means warn about implicit declarations. */
571 extern int warn_implicit;
573 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
574 with GCC this doesn't matter as __null is guaranteed to have the right
575 size. */
577 extern int warn_strict_null_sentinel;
579 /* Maximum template instantiation depth. This limit is rather
580 arbitrary, but it exists to limit the time it takes to notice
581 infinite template instantiations. */
583 extern int max_tinst_depth;
585 /* Nonzero means the expression being parsed will never be evaluated.
586 This is a count, since unevaluated expressions can nest. */
588 extern int skip_evaluation;
590 /* C types are partitioned into three subsets: object, function, and
591 incomplete types. */
592 #define C_TYPE_OBJECT_P(type) \
593 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
595 #define C_TYPE_INCOMPLETE_P(type) \
596 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
598 #define C_TYPE_FUNCTION_P(type) \
599 (TREE_CODE (type) == FUNCTION_TYPE)
601 /* For convenience we define a single macro to identify the class of
602 object or incomplete types. */
603 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
604 (!C_TYPE_FUNCTION_P (type))
606 /* Attribute table common to the C front ends. */
607 extern const struct attribute_spec c_common_attribute_table[];
608 extern const struct attribute_spec c_common_format_attribute_table[];
610 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
611 ID is the identifier to use, NAME is the string.
612 TYPE_DEP indicates whether it depends on type of the function or not
613 (i.e. __PRETTY_FUNCTION__). */
615 extern tree (*make_fname_decl) (tree, int);
617 extern tree identifier_global_value (tree);
618 extern void record_builtin_type (enum rid, const char *, tree);
619 extern tree build_void_list_node (void);
620 extern void start_fname_decls (void);
621 extern void finish_fname_decls (void);
622 extern const char *fname_as_string (int);
623 extern tree fname_decl (unsigned, tree);
625 extern void check_function_arguments (tree, tree, tree);
626 extern void check_function_arguments_recurse (void (*)
627 (void *, tree,
628 unsigned HOST_WIDE_INT),
629 void *, tree,
630 unsigned HOST_WIDE_INT);
631 extern void check_function_format (tree, tree);
632 extern void set_Wformat (int);
633 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
634 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
635 extern int c_common_handle_option (size_t code, const char *arg, int value);
636 extern bool c_common_missing_argument (const char *opt, size_t code);
637 extern tree c_common_type_for_mode (enum machine_mode, int);
638 extern tree c_common_type_for_size (unsigned int, int);
639 extern tree c_common_unsigned_type (tree);
640 extern tree c_common_signed_type (tree);
641 extern tree c_common_signed_or_unsigned_type (int, tree);
642 extern tree c_common_truthvalue_conversion (tree);
643 extern void c_apply_type_quals_to_decl (int, tree);
644 extern tree c_sizeof_or_alignof_type (tree, bool, int);
645 extern tree c_alignof_expr (tree);
646 /* Print an error message for invalid operands to arith operation CODE.
647 NOP_EXPR is used as a special case (see truthvalue_conversion). */
648 extern void binary_op_error (enum tree_code);
649 extern tree fix_string_type (tree);
650 struct varray_head_tag;
651 extern void constant_expression_warning (tree);
652 extern tree convert_and_check (tree, tree);
653 extern void overflow_warning (tree);
654 extern void unsigned_conversion_warning (tree, tree);
655 extern bool c_determine_visibility (tree);
656 extern bool same_scalar_type_ignoring_signedness (tree, tree);
658 #define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1)
659 #define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
661 /* Subroutine of build_binary_op, used for comparison operations.
662 See if the operands have both been converted from subword integer types
663 and, if so, perhaps change them both back to their original type. */
664 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
666 extern tree pointer_int_sum (enum tree_code, tree, tree);
667 extern unsigned int min_precision (tree, int);
669 /* Add qualifiers to a type, in the fashion for C. */
670 extern tree c_build_qualified_type (tree, int);
672 /* Build tree nodes and builtin functions common to both C and C++ language
673 frontends. */
674 extern void c_common_nodes_and_builtins (void);
676 extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
678 extern void disable_builtin_function (const char *);
680 extern tree build_va_arg (tree, tree);
682 extern unsigned int c_common_init_options (unsigned int, const char **);
683 extern bool c_common_post_options (const char **);
684 extern bool c_common_init (void);
685 extern void c_common_finish (void);
686 extern void c_common_parse_file (int);
687 extern HOST_WIDE_INT c_common_get_alias_set (tree);
688 extern void c_register_builtin_type (tree, const char*);
689 extern bool c_promoting_integer_type_p (tree);
690 extern int self_promoting_args_p (tree);
691 extern tree strip_array_types (tree);
692 extern tree strip_pointer_operator (tree);
693 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
695 /* This is the basic parsing function. */
696 extern void c_parse_file (void);
697 /* This is misnamed, it actually performs end-of-compilation processing. */
698 extern void finish_file (void);
701 /* These macros provide convenient access to the various _STMT nodes. */
703 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
704 if a statement expression. */
705 #define STATEMENT_LIST_STMT_EXPR(NODE) \
706 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
708 /* Nonzero if a label has been added to the statement list. */
709 #define STATEMENT_LIST_HAS_LABEL(NODE) \
710 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
712 /* COMPOUND_LITERAL_EXPR accessors. */
713 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
714 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
715 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
716 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
718 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
720 enum c_tree_code {
721 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
722 #include "c-common.def"
723 LAST_C_TREE_CODE
726 #undef DEFTREECODE
728 extern int anon_aggr_type_p (tree);
730 /* For a VAR_DECL that is an anonymous union, these are the various
731 sub-variables that make up the anonymous union. */
732 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
734 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
735 #define DECL_C_BIT_FIELD(NODE) \
736 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
737 #define SET_DECL_C_BIT_FIELD(NODE) \
738 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
739 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
740 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
742 extern void emit_local_var (tree);
743 extern tree do_case (tree, tree);
744 extern tree build_stmt (enum tree_code, ...);
745 extern tree build_case_label (tree, tree, tree);
747 /* These functions must be defined by each front-end which implements
748 a variant of the C language. They are used in c-common.c. */
750 extern tree build_unary_op (enum tree_code, tree, int);
751 extern tree build_binary_op (enum tree_code, tree, tree, int);
752 extern tree perform_integral_promotions (tree);
754 /* Given two integer or real types, return the type for their sum.
755 Given two compatible ANSI C types, returns the merged type. */
757 extern tree common_type (tree, tree);
759 extern tree decl_constant_value (tree);
761 /* Handle increment and decrement of boolean types. */
762 extern tree boolean_increment (enum tree_code, tree);
764 extern int case_compare (splay_tree_key, splay_tree_key);
766 extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
768 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
770 extern tree build_function_call (tree, tree);
772 extern tree resolve_overloaded_builtin (tree, tree);
774 extern tree finish_label_address_expr (tree);
776 /* Same function prototype, but the C and C++ front ends have
777 different implementations. Used in c-common.c. */
778 extern tree lookup_label (tree);
780 extern int vector_types_convertible_p (tree t1, tree t2);
782 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
784 extern tree c_staticp (tree);
786 extern void init_c_lex (void);
788 extern void c_cpp_builtins (cpp_reader *);
790 /* Positive if an implicit `extern "C"' scope has just been entered;
791 negative if such a scope has just been exited. */
792 extern GTY(()) int pending_lang_change;
794 /* Information recorded about each file examined during compilation. */
796 struct c_fileinfo
798 int time; /* Time spent in the file. */
800 /* Flags used only by C++.
801 INTERFACE_ONLY nonzero means that we are in an "interface" section
802 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
803 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
804 INTERFACE_ONLY is zero, it means that we are responsible for
805 exporting definitions that others might need. */
806 short interface_only;
807 short interface_unknown;
810 struct c_fileinfo *get_fileinfo (const char *);
811 extern void dump_time_statistics (void);
813 extern bool c_dump_tree (void *, tree);
815 extern void c_warn_unused_result (tree *);
817 extern void verify_sequence_points (tree);
819 extern tree fold_offsetof (tree);
821 /* Places where an lvalue, or modifiable lvalue, may be required.
822 Used to select diagnostic messages in lvalue_error and
823 readonly_error. */
824 enum lvalue_use {
825 lv_assign,
826 lv_increment,
827 lv_decrement,
828 lv_addressof,
829 lv_asm
832 extern void lvalue_error (enum lvalue_use);
834 extern int complete_array_type (tree *, tree, bool);
836 extern tree builtin_type_for_size (int, bool);
838 /* In c-gimplify.c */
839 extern void c_genericize (tree);
840 extern int c_gimplify_expr (tree *, tree *, tree *);
841 extern tree c_build_bind_expr (tree, tree);
843 /* In c-pch.c */
844 extern void pch_init (void);
845 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
846 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
847 const char *orig);
848 extern void c_common_write_pch (void);
849 extern void c_common_no_more_pch (void);
850 extern void c_common_pch_pragma (cpp_reader *pfile);
851 extern void c_common_print_pch_checksum (FILE *f);
853 /* In *-checksum.c */
854 extern const unsigned char executable_checksum[16];
856 extern void builtin_define_with_value (const char *, const char *, int);
857 extern void c_stddef_cpp_builtins (void);
858 extern void fe_file_change (const struct line_map *);
859 extern void c_parse_error (const char *, enum cpp_ttype, tree);
861 /* Objective-C / Objective-C++ entry points. */
863 /* The following ObjC/ObjC++ functions are called by the C and/or C++
864 front-ends; they all must have corresponding stubs in stub-objc.c. */
865 extern tree objc_is_class_name (tree);
866 extern tree objc_is_object_ptr (tree);
867 extern void objc_check_decl (tree);
868 extern int objc_is_reserved_word (tree);
869 extern bool objc_compare_types (tree, tree, int, tree);
870 extern void objc_volatilize_decl (tree);
871 extern bool objc_type_quals_match (tree, tree);
872 extern tree objc_rewrite_function_call (tree, tree);
873 extern tree objc_message_selector (void);
874 extern tree objc_lookup_ivar (tree, tree);
875 extern void objc_clear_super_receiver (void);
876 extern int objc_is_public (tree, tree);
877 extern tree objc_is_id (tree);
878 extern void objc_declare_alias (tree, tree);
879 extern void objc_declare_class (tree);
880 extern void objc_declare_protocols (tree);
881 extern tree objc_build_message_expr (tree);
882 extern tree objc_finish_message_expr (tree, tree, tree);
883 extern tree objc_build_selector_expr (tree);
884 extern tree objc_build_protocol_expr (tree);
885 extern tree objc_build_encode_expr (tree);
886 extern tree objc_build_string_object (tree);
887 extern tree objc_get_protocol_qualified_type (tree, tree);
888 extern tree objc_get_class_reference (tree);
889 extern tree objc_get_class_ivars (tree);
890 extern void objc_start_class_interface (tree, tree, tree);
891 extern void objc_start_category_interface (tree, tree, tree);
892 extern void objc_start_protocol (tree, tree);
893 extern void objc_continue_interface (void);
894 extern void objc_finish_interface (void);
895 extern void objc_start_class_implementation (tree, tree);
896 extern void objc_start_category_implementation (tree, tree);
897 extern void objc_continue_implementation (void);
898 extern void objc_finish_implementation (void);
899 extern void objc_set_visibility (int);
900 extern void objc_set_method_type (enum tree_code);
901 extern tree objc_build_method_signature (tree, tree, tree, bool);
902 extern void objc_add_method_declaration (tree);
903 extern void objc_start_method_definition (tree);
904 extern void objc_finish_method_definition (tree);
905 extern void objc_add_instance_variable (tree);
906 extern tree objc_build_keyword_decl (tree, tree, tree);
907 extern tree objc_build_throw_stmt (tree);
908 extern void objc_begin_try_stmt (location_t, tree);
909 extern tree objc_finish_try_stmt (void);
910 extern void objc_begin_catch_clause (tree);
911 extern void objc_finish_catch_clause (void);
912 extern void objc_build_finally_clause (location_t, tree);
913 extern tree objc_build_synchronized (location_t, tree, tree);
914 extern int objc_static_init_needed_p (void);
915 extern tree objc_generate_static_init_call (tree);
916 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
918 /* The following are provided by the C and C++ front-ends, and called by
919 ObjC/ObjC++. */
920 extern void *objc_get_current_scope (void);
921 extern void objc_mark_locals_volatile (void *);
923 /* In c-ppoutput.c */
924 extern void init_pp_output (FILE *);
925 extern void preprocess_file (cpp_reader *);
926 extern void pp_file_change (const struct line_map *);
927 extern void pp_dir_change (cpp_reader *, const char *);
928 extern bool check_missing_format_attribute (tree, tree);
930 /* In order for the format checking to accept the C frontend
931 diagnostic framework extensions, you must include this file before
932 toplev.h, not after. The C front end formats are a subset of those
933 for C++, so they are the appropriate set to use in common code;
934 cp-tree.h overrides this for C++. */
935 #ifndef GCC_DIAG_STYLE
936 #define GCC_DIAG_STYLE __gcc_cdiag__
937 #endif
939 #endif /* ! GCC_C_COMMON_H */