1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
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 C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
34 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
35 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
36 C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
38 3: STATEMENT_LIST_HAS_LABEL (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
, RID_SAT
,
61 RID_FRIEND
, RID_VIRTUAL
, RID_EXPLICIT
, RID_EXPORT
, RID_MUTABLE
,
64 RID_IN
, RID_OUT
, RID_INOUT
, RID_BYCOPY
, RID_BYREF
, RID_ONEWAY
,
66 /* C (reserved and imaginary types not implemented, so any use is a
71 RID_INT
, RID_CHAR
, RID_FLOAT
, RID_DOUBLE
, RID_VOID
,
73 RID_ENUM
, RID_STRUCT
, RID_UNION
, RID_IF
, RID_ELSE
,
74 RID_WHILE
, RID_DO
, RID_FOR
, RID_SWITCH
, RID_CASE
,
75 RID_DEFAULT
, RID_BREAK
, RID_CONTINUE
, RID_RETURN
, RID_GOTO
,
79 RID_ASM
, RID_TYPEOF
, RID_ALIGNOF
, RID_ATTRIBUTE
, RID_VA_ARG
,
80 RID_EXTENSION
, RID_IMAGPART
, RID_REALPART
, RID_LABEL
, RID_CHOOSE_EXPR
,
81 RID_TYPES_COMPATIBLE_P
,
82 RID_DFLOAT32
, RID_DFLOAT64
, RID_DFLOAT128
,
85 /* This means to warn that this is a C++ keyword, and then treat it
86 as a normal identifier. */
89 /* Too many ways of getting the name of a function as a string */
90 RID_FUNCTION_NAME
, RID_PRETTY_FUNCTION_NAME
, RID_C99_FUNCTION_NAME
,
93 RID_BOOL
, RID_WCHAR
, RID_CLASS
,
94 RID_PUBLIC
, RID_PRIVATE
, RID_PROTECTED
,
95 RID_TEMPLATE
, RID_NULL
, RID_CATCH
,
96 RID_DELETE
, RID_FALSE
, RID_NAMESPACE
,
97 RID_NEW
, RID_OFFSETOF
, RID_OPERATOR
,
98 RID_THIS
, RID_THROW
, RID_TRUE
,
99 RID_TRY
, RID_TYPENAME
, RID_TYPEID
,
100 RID_USING
, RID_CHAR16
, RID_CHAR32
,
103 RID_CONSTCAST
, RID_DYNCAST
, RID_REINTCAST
, RID_STATCAST
,
106 RID_HAS_NOTHROW_ASSIGN
, RID_HAS_NOTHROW_CONSTRUCTOR
,
107 RID_HAS_NOTHROW_COPY
, RID_HAS_TRIVIAL_ASSIGN
,
108 RID_HAS_TRIVIAL_CONSTRUCTOR
, RID_HAS_TRIVIAL_COPY
,
109 RID_HAS_TRIVIAL_DESTRUCTOR
, RID_HAS_VIRTUAL_DESTRUCTOR
,
110 RID_IS_ABSTRACT
, RID_IS_BASE_OF
,
111 RID_IS_CONVERTIBLE_TO
, RID_IS_CLASS
,
112 RID_IS_EMPTY
, RID_IS_ENUM
,
113 RID_IS_POD
, RID_IS_POLYMORPHIC
,
114 RID_IS_STD_LAYOUT
, RID_IS_TRIVIAL
,
118 RID_CONSTEXPR
, RID_DECLTYPE
, RID_NULLPTR
, RID_STATIC_ASSERT
,
121 RID_AT_ENCODE
, RID_AT_END
,
122 RID_AT_CLASS
, RID_AT_ALIAS
, RID_AT_DEFS
,
123 RID_AT_PRIVATE
, RID_AT_PROTECTED
, RID_AT_PUBLIC
,
124 RID_AT_PROTOCOL
, RID_AT_SELECTOR
,
125 RID_AT_THROW
, RID_AT_TRY
, RID_AT_CATCH
,
126 RID_AT_FINALLY
, RID_AT_SYNCHRONIZED
,
128 RID_AT_IMPLEMENTATION
,
130 /* Named address support, mapping the keyword to a particular named address
131 number. Named address space 0 is reserved for the generic address. If
132 there are more than 254 named addresses, the addr_space_t type will need
133 to be grown from an unsigned char to unsigned short. */
134 RID_ADDR_SPACE_0
, /* generic address */
151 RID_FIRST_ADDR_SPACE
= RID_ADDR_SPACE_0
,
152 RID_LAST_ADDR_SPACE
= RID_ADDR_SPACE_15
,
156 RID_FIRST_MODIFIER
= RID_STATIC
,
157 RID_LAST_MODIFIER
= RID_ONEWAY
,
159 RID_FIRST_CXX0X
= RID_CONSTEXPR
,
160 RID_LAST_CXX0X
= RID_STATIC_ASSERT
,
161 RID_FIRST_AT
= RID_AT_ENCODE
,
162 RID_LAST_AT
= RID_AT_IMPLEMENTATION
,
163 RID_FIRST_PQ
= RID_IN
,
164 RID_LAST_PQ
= RID_ONEWAY
167 #define OBJC_IS_AT_KEYWORD(rid) \
168 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
169 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
171 #define OBJC_IS_PQ_KEYWORD(rid) \
172 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
173 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
175 /* The elements of `ridpointers' are identifier nodes for the reserved
176 type names and storage classes. It is indexed by a RID_... value. */
177 extern GTY ((length ("(int) RID_MAX"))) tree
*ridpointers
;
179 /* Standard named or nameless data types of the C compiler. */
186 CTI_UNDERLYING_WCHAR_TYPE
,
188 CTI_SIGNED_SIZE_TYPE
, /* For format checking only. */
189 CTI_UNSIGNED_PTRDIFF_TYPE
, /* For format checking only. */
192 CTI_WIDEST_INT_LIT_TYPE
,
193 CTI_WIDEST_UINT_LIT_TYPE
,
195 /* Types for <stdint.h>, that may not be defined on all
207 CTI_INT_LEAST16_TYPE
,
208 CTI_INT_LEAST32_TYPE
,
209 CTI_INT_LEAST64_TYPE
,
210 CTI_UINT_LEAST8_TYPE
,
211 CTI_UINT_LEAST16_TYPE
,
212 CTI_UINT_LEAST32_TYPE
,
213 CTI_UINT_LEAST64_TYPE
,
219 CTI_UINT_FAST16_TYPE
,
220 CTI_UINT_FAST32_TYPE
,
221 CTI_UINT_FAST64_TYPE
,
226 CTI_CHAR16_ARRAY_TYPE
,
227 CTI_CHAR32_ARRAY_TYPE
,
228 CTI_WCHAR_ARRAY_TYPE
,
231 CTI_CONST_STRING_TYPE
,
233 /* Type for boolean expressions (bool in C++, int in C). */
236 CTI_TRUTHVALUE_FALSE
,
238 CTI_DEFAULT_FUNCTION_TYPE
,
240 /* These are not types, but we have to look them up all the time. */
241 CTI_FUNCTION_NAME_DECL
,
242 CTI_PRETTY_FUNCTION_NAME_DECL
,
243 CTI_C99_FUNCTION_NAME_DECL
,
244 CTI_SAVED_FUNCTION_NAME_DECLS
,
253 #define C_CPP_HASHNODE(id) \
254 (&(((struct c_common_identifier *) (id))->node))
255 #define C_RID_CODE(id) \
256 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
257 #define C_SET_RID_CODE(id, code) \
258 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
260 /* Identifier part common to the C front ends. Inherits from
261 tree_identifier, despite appearances. */
262 struct GTY(()) c_common_identifier
{
263 struct tree_common common
;
264 struct cpp_hashnode node
;
267 /* An entry in the reserved keyword table. */
269 struct c_common_resword
271 const char *const word
;
272 ENUM_BITFIELD(rid
) const rid
: 16;
273 const unsigned int disable
: 16;
276 /* Disable mask. Keywords are disabled if (reswords[i].disable &
277 mask) is _true_. Thus for keywords which are present in all
278 languages the disable field is zero. */
280 #define D_CONLY 0x001 /* C only (not in C++). */
281 #define D_CXXONLY 0x002 /* C++ only (not in C). */
282 #define D_C99 0x004 /* In C, C99 only. */
283 #define D_CXX0X 0x008 /* In C++, C++0X only. */
284 #define D_EXT 0x010 /* GCC extension. */
285 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
286 #define D_ASM 0x040 /* Disabled by -fno-asm. */
287 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
288 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
289 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
291 /* The reserved keyword table. */
292 extern const struct c_common_resword c_common_reswords
[];
294 /* The number of items in the reserved keyword table. */
295 extern const unsigned int num_c_common_reswords
;
297 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
298 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
299 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
300 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
301 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
302 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
303 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
304 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
305 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
306 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
307 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
309 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
310 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
311 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
312 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
313 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
314 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
315 #define uint16_type_node c_global_trees[CTI_UINT16_TYPE]
316 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
317 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
318 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
319 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
320 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
321 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
322 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
323 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
324 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
325 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
326 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
327 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
328 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
329 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
330 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
331 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
332 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
333 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
334 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
335 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
337 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
338 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
339 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
341 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
342 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
343 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
344 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
345 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
346 #define string_type_node c_global_trees[CTI_STRING_TYPE]
347 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
349 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
351 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
352 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
353 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
354 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
356 /* A node for `((void) 0)'. */
357 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
359 /* The node for C++ `__null'. */
360 #define null_node c_global_trees[CTI_NULL]
362 extern GTY(()) tree c_global_trees
[CTI_MAX
];
364 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
365 tree for size reasons. */
366 struct GTY(()) sorted_fields_type
{
368 tree
GTY((length ("%h.len"))) elts
[1];
371 /* Mark which labels are explicitly declared.
372 These may be shadowed, and may be referenced from nested functions. */
373 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
375 typedef enum c_language_kind
377 clk_c
= 0, /* C90, C94 or C99 */
378 clk_objc
= 1, /* clk_c with ObjC features. */
379 clk_cxx
= 2, /* ANSI/ISO C++ */
380 clk_objcxx
= 3 /* clk_cxx with ObjC features. */
384 /* To test for a specific language use c_language, defined by each
385 front end. For "ObjC features" or "not C++" use the macros. */
386 extern c_language_kind c_language
;
388 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
389 #define c_dialect_objc() ((c_language & clk_objc) != 0)
391 /* The various name of operator that appears in error messages. */
392 typedef enum ref_operator
{
401 /* implicit conversion */
402 RO_IMPLICIT_CONVERSION
405 /* Information about a statement tree. */
407 struct GTY(()) stmt_tree_s
{
408 /* The current statement list being collected. */
409 tree x_cur_stmt_list
;
411 /* In C++, Nonzero if we should treat statements as full
412 expressions. In particular, this variable is no-zero if at the
413 end of a statement we should destroy any temporaries created
414 during that statement. Similarly, if, at the end of a block, we
415 should destroy any local variables in this block. Normally, this
416 variable is nonzero, since those are the normal semantics of
419 However, in order to represent aggregate initialization code as
420 tree structure, we use statement-expressions. The statements
421 within the statement expression should not result in cleanups
422 being run until the entire enclosing statement is complete.
424 This flag has no effect in C. */
425 int stmts_are_full_exprs_p
;
428 typedef struct stmt_tree_s
*stmt_tree
;
430 /* Global state pertinent to the current function. Some C dialects
431 extend this structure with additional fields. */
433 struct GTY(()) c_language_function
{
434 /* While we are parsing the function, this contains information
435 about the statement-tree that we are building. */
436 struct stmt_tree_s x_stmt_tree
;
439 /* When building a statement-tree, this is the current statement list
440 being collected. It's TREE_CHAIN is a back-pointer to the previous
443 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
445 /* Language-specific hooks. */
447 /* If non-NULL, this function is called after a precompile header file
449 extern void (*lang_post_pch_load
) (void);
451 extern void push_file_scope (void);
452 extern void pop_file_scope (void);
453 extern stmt_tree
current_stmt_tree (void);
454 extern tree
push_stmt_list (void);
455 extern tree
pop_stmt_list (tree
);
456 extern tree
add_stmt (tree
);
457 extern void push_cleanup (tree
, tree
, bool);
458 extern tree
pushdecl_top_level (tree
);
459 extern tree
pushdecl (tree
);
460 extern tree
build_modify_expr (location_t
, tree
, tree
, enum tree_code
,
461 location_t
, tree
, tree
);
462 extern tree
build_indirect_ref (location_t
, tree
, ref_operator
);
464 extern int c_expand_decl (tree
);
466 extern int field_decl_cmp (const void *, const void *);
467 extern void resort_sorted_fields (void *, void *, gt_pointer_operator
,
469 extern bool has_c_linkage (const_tree decl
);
471 /* Switches common to the C front ends. */
473 /* Nonzero if prepreprocessing only. */
475 extern int flag_preprocess_only
;
477 /* Zero means that faster, ...NonNil variants of objc_msgSend...
478 calls will be used in ObjC; passing nil receivers to such calls
479 will most likely result in crashes. */
480 extern int flag_nil_receivers
;
482 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
483 @try, etc.) in source code. */
484 extern int flag_objc_exceptions
;
486 /* Nonzero means that we generate NeXT setjmp based exceptions. */
487 extern int flag_objc_sjlj_exceptions
;
489 /* Nonzero means that code generation will be altered to support
490 "zero-link" execution. This currently affects ObjC only, but may
491 affect other languages in the future. */
492 extern int flag_zero_link
;
494 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
495 unit. It will inform the ObjC runtime that class definition(s) herein
496 contained are to replace one(s) previously loaded. */
497 extern int flag_replace_objc_classes
;
499 /* Nonzero means don't output line number information. */
501 extern char flag_no_line_commands
;
503 /* Nonzero causes -E output not to be done, but directives such as
504 #define that have side effects are still obeyed. */
506 extern char flag_no_output
;
508 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
509 'N' or 'U' of the command line switch. */
511 extern char flag_dump_macros
;
513 /* Nonzero means pass #include lines through to the output. */
515 extern char flag_dump_includes
;
517 /* Nonzero means process PCH files while preprocessing. */
519 extern bool flag_pch_preprocess
;
521 /* The file name to which we should write a precompiled header, or
522 NULL if no header will be written in this compile. */
524 extern const char *pch_file
;
526 /* Nonzero if an ISO standard was selected. It rejects macros in the
531 /* Nonzero if -undef was given. It suppresses target built-in macros
534 extern int flag_undef
;
536 /* Nonzero means don't recognize the non-ANSI builtin functions. */
538 extern int flag_no_builtin
;
540 /* Nonzero means don't recognize the non-ANSI builtin functions.
543 extern int flag_no_nonansi_builtin
;
545 /* Nonzero means give `double' the same size as `float'. */
547 extern int flag_short_double
;
549 /* Nonzero means give `wchar_t' the same size as `short'. */
551 extern int flag_short_wchar
;
553 /* Nonzero means allow implicit conversions between vectors with
554 differing numbers of subparts and/or differing element types. */
555 extern int flag_lax_vector_conversions
;
557 /* Nonzero means allow Microsoft extensions without warnings or errors. */
558 extern int flag_ms_extensions
;
560 /* Nonzero means don't recognize the keyword `asm'. */
562 extern int flag_no_asm
;
564 /* Nonzero means give string constants the type `const char *', as mandated
567 extern int flag_const_strings
;
569 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
571 extern int flag_signed_bitfields
;
573 /* Warn about #pragma directives that are not recognized. */
575 extern int warn_unknown_pragmas
; /* Tri state variable. */
577 /* Warn about format/argument anomalies in calls to formatted I/O functions
578 (*printf, *scanf, strftime, strfmon, etc.). */
580 extern int warn_format
;
583 /* C/ObjC language option variables. */
586 /* Nonzero means allow type mismatches in conditional expressions;
587 just make their values `void'. */
589 extern int flag_cond_mismatch
;
591 /* Nonzero means enable C89 Amendment 1 features. */
593 extern int flag_isoc94
;
595 /* Nonzero means use the ISO C99 (or C1X) dialect of C. */
597 extern int flag_isoc99
;
599 /* Nonzero means use the ISO C1X dialect of C. */
601 extern int flag_isoc1x
;
603 /* Nonzero means that we have builtin functions, and main is an int. */
605 extern int flag_hosted
;
607 /* ObjC language option variables. */
610 /* Open and close the file for outputting class declarations, if
613 extern int flag_gen_declaration
;
615 /* Tells the compiler that this is a special run. Do not perform any
616 compiling, instead we are to test some platform dependent features
617 and output a C header file with appropriate definitions. */
619 extern int print_struct_values
;
621 /* ???. Undocumented. */
623 extern const char *constant_string_class_name
;
626 /* C++ language option variables. */
629 /* Nonzero means don't recognize any extension keywords. */
631 extern int flag_no_gnu_keywords
;
633 /* Nonzero means do emit exported implementations of functions even if
634 they can be inlined. */
636 extern int flag_implement_inlines
;
638 /* Nonzero means that implicit instantiations will be emitted if needed. */
640 extern int flag_implicit_templates
;
642 /* Nonzero means that implicit instantiations of inline templates will be
643 emitted if needed, even if instantiations of non-inline templates
646 extern int flag_implicit_inline_templates
;
648 /* Nonzero means generate separate instantiation control files and
649 juggle them at link time. */
651 extern int flag_use_repository
;
653 /* Nonzero if we want to issue diagnostics that the standard says are not
656 extern int flag_optional_diags
;
658 /* Nonzero means we should attempt to elide constructors when possible. */
660 extern int flag_elide_constructors
;
662 /* Nonzero means that member functions defined in class scope are
663 inline by default. */
665 extern int flag_default_inline
;
667 /* Controls whether compiler generates 'type descriptor' that give
668 run-time type information. */
670 extern int flag_rtti
;
672 /* Nonzero if we want to conserve space in the .o files. We do this
673 by putting uninitialized data and runtime initialized data into
674 .common instead of .data at the expense of not flagging multiple
677 extern int flag_conserve_space
;
679 /* Nonzero if we want to obey access control semantics. */
681 extern int flag_access_control
;
683 /* Nonzero if we want to check the return value of new and avoid calling
684 constructors if it is a null pointer. */
686 extern int flag_check_new
;
688 /* The supported C++ dialects. */
693 /* Experimental features that are likely to become part of
698 /* The C++ dialect being used. C++98 is the default. */
699 extern enum cxx_dialect cxx_dialect
;
701 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
702 initialization variables.
703 0: Old rules, set by -fno-for-scope.
704 2: New ISO rules, set by -ffor-scope.
705 1: Try to implement new ISO rules, but with backup compatibility
706 (and warnings). This is the default, for now. */
708 extern int flag_new_for_scope
;
710 /* Nonzero if we want to emit defined symbols with common-like linkage as
711 weak symbols where possible, in order to conform to C++ semantics.
712 Otherwise, emit them as local symbols. */
714 extern int flag_weak
;
716 /* 0 means we want the preprocessor to not emit line directives for
717 the current working directory. 1 means we want it to do it. -1
718 means we should decide depending on whether debugging information
719 is being emitted or not. */
721 extern int flag_working_directory
;
723 /* Nonzero to use __cxa_atexit, rather than atexit, to register
724 destructors for local statics and global objects. */
726 extern int flag_use_cxa_atexit
;
728 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
731 extern int flag_use_cxa_get_exception_ptr
;
733 /* Nonzero means to implement standard semantics for exception
734 specifications, calling unexpected if an exception is thrown that
735 doesn't match the specification. Zero means to treat them as
736 assertions and optimize accordingly, but not check them. */
738 extern int flag_enforce_eh_specs
;
740 /* Nonzero (the default) means to generate thread-safe code for
741 initializing local statics. */
743 extern int flag_threadsafe_statics
;
745 /* Nonzero if we want to pretty-print template specializations as the
746 template signature followed by the arguments. */
748 extern int flag_pretty_templates
;
750 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
751 with GCC this doesn't matter as __null is guaranteed to have the right
754 extern int warn_strict_null_sentinel
;
756 /* Maximum template instantiation depth. This limit is rather
757 arbitrary, but it exists to limit the time it takes to notice
758 infinite template instantiations. */
760 extern int max_tinst_depth
;
762 /* Nonzero means that we should not issue warnings about problems that
763 occur when the code is executed, because the code being processed
764 is not expected to be executed. This is set during parsing. This
765 is used for cases like sizeof() and "0 ? a : b". This is a count,
766 not a bool, because unexecuted expressions can nest. */
768 extern int c_inhibit_evaluation_warnings
;
770 /* Whether lexing has been completed, so subsequent preprocessor
771 errors should use the compiler's input_location. */
773 extern bool done_lexing
;
775 /* C types are partitioned into three subsets: object, function, and
777 #define C_TYPE_OBJECT_P(type) \
778 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
780 #define C_TYPE_INCOMPLETE_P(type) \
781 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
783 #define C_TYPE_FUNCTION_P(type) \
784 (TREE_CODE (type) == FUNCTION_TYPE)
786 /* For convenience we define a single macro to identify the class of
787 object or incomplete types. */
788 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
789 (!C_TYPE_FUNCTION_P (type))
791 /* Attribute table common to the C front ends. */
792 extern const struct attribute_spec c_common_attribute_table
[];
793 extern const struct attribute_spec c_common_format_attribute_table
[];
795 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
796 ID is the identifier to use, NAME is the string.
797 TYPE_DEP indicates whether it depends on type of the function or not
798 (i.e. __PRETTY_FUNCTION__). */
800 extern tree (*make_fname_decl
) (location_t
, tree
, int);
802 /* In c-decl.c and cp/tree.c. FIXME. */
803 extern void c_register_addr_space (const char *str
, addr_space_t as
);
806 extern const char *c_addr_space_name (addr_space_t as
);
807 extern tree
identifier_global_value (tree
);
808 extern void record_builtin_type (enum rid
, const char *, tree
);
809 extern tree
build_void_list_node (void);
810 extern void start_fname_decls (void);
811 extern void finish_fname_decls (void);
812 extern const char *fname_as_string (int);
813 extern tree
fname_decl (location_t
, unsigned, tree
);
815 extern void check_function_arguments (tree
, int, tree
*, tree
);
816 extern void check_function_arguments_recurse (void (*)
818 unsigned HOST_WIDE_INT
),
820 unsigned HOST_WIDE_INT
);
821 extern bool check_builtin_function_arguments (tree
, int, tree
*);
822 extern void check_function_format (tree
, int, tree
*);
823 extern void set_Wformat (int);
824 extern tree
handle_format_attribute (tree
*, tree
, tree
, int, bool *);
825 extern tree
handle_format_arg_attribute (tree
*, tree
, tree
, int, bool *);
826 extern bool attribute_takes_identifier_p (const_tree
);
827 extern int c_common_handle_option (size_t code
, const char *arg
, int value
, int kind
);
828 extern bool c_common_missing_argument (const char *opt
, size_t code
);
829 extern tree
c_common_type_for_mode (enum machine_mode
, int);
830 extern tree
c_common_type_for_size (unsigned int, int);
831 extern tree
c_common_fixed_point_type_for_size (unsigned int, unsigned int,
833 extern tree
c_common_unsigned_type (tree
);
834 extern tree
c_common_signed_type (tree
);
835 extern tree
c_common_signed_or_unsigned_type (int, tree
);
836 extern tree
c_build_bitfield_integer_type (unsigned HOST_WIDE_INT
, int);
837 extern bool decl_with_nonnull_addr_p (const_tree
);
838 extern tree
c_fully_fold (tree
, bool, bool *);
839 extern tree
decl_constant_value_for_optimization (tree
);
840 extern tree
c_wrap_maybe_const (tree
, bool);
841 extern tree
c_save_expr (tree
);
842 extern tree
c_common_truthvalue_conversion (location_t
, tree
);
843 extern void c_apply_type_quals_to_decl (int, tree
);
844 extern tree
c_sizeof_or_alignof_type (location_t
, tree
, bool, int);
845 extern tree
c_alignof_expr (location_t
, tree
);
846 /* Print an error message for invalid operands to arith operation CODE.
847 NOP_EXPR is used as a special case (see truthvalue_conversion). */
848 extern void binary_op_error (location_t
, enum tree_code
, tree
, tree
);
849 extern tree
fix_string_type (tree
);
850 extern void constant_expression_warning (tree
);
851 extern void constant_expression_error (tree
);
852 extern bool strict_aliasing_warning (tree
, tree
, tree
);
853 extern void warnings_for_convert_and_check (tree
, tree
, tree
);
854 extern tree
convert_and_check (tree
, tree
);
855 extern void overflow_warning (location_t
, tree
);
856 extern void warn_logical_operator (location_t
, enum tree_code
, tree
,
857 enum tree_code
, tree
, enum tree_code
, tree
);
858 extern void check_main_parameter_types (tree decl
);
859 extern bool c_determine_visibility (tree
);
860 extern bool same_scalar_type_ignoring_signedness (tree
, tree
);
861 extern void mark_valid_location_for_stdc_pragma (bool);
862 extern bool valid_location_for_stdc_pragma_p (void);
863 extern void set_float_const_decimal64 (void);
864 extern void clear_float_const_decimal64 (void);
865 extern bool float_const_decimal64_p (void);
867 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, 1)
868 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
870 /* Subroutine of build_binary_op, used for certain operations. */
871 extern tree
shorten_binary_op (tree result_type
, tree op0
, tree op1
, bool bitwise
);
873 /* Subroutine of build_binary_op, used for comparison operations.
874 See if the operands have both been converted from subword integer types
875 and, if so, perhaps change them both back to their original type. */
876 extern tree
shorten_compare (tree
*, tree
*, tree
*, enum tree_code
*);
878 extern tree
pointer_int_sum (location_t
, enum tree_code
, tree
, tree
);
880 /* Add qualifiers to a type, in the fashion for C. */
881 extern tree
c_build_qualified_type (tree
, int);
883 /* Build tree nodes and builtin functions common to both C and C++ language
885 extern void c_common_nodes_and_builtins (void);
887 extern void disable_builtin_function (const char *);
889 extern void set_compound_literal_name (tree decl
);
891 extern tree
build_va_arg (location_t
, tree
, tree
);
893 extern unsigned int c_common_init_options (unsigned int, const char **);
894 extern bool c_common_post_options (const char **);
895 extern bool c_common_init (void);
896 extern void c_common_finish (void);
897 extern void c_common_parse_file (int);
898 extern alias_set_type
c_common_get_alias_set (tree
);
899 extern void c_register_builtin_type (tree
, const char*);
900 extern bool c_promoting_integer_type_p (const_tree
);
901 extern int self_promoting_args_p (const_tree
);
902 extern tree
strip_pointer_operator (tree
);
903 extern tree
strip_pointer_or_array_types (tree
);
904 extern HOST_WIDE_INT
c_common_to_target_charset (HOST_WIDE_INT
);
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);
912 /* These macros provide convenient access to the various _STMT nodes. */
914 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
915 if a statement expression. */
916 #define STATEMENT_LIST_STMT_EXPR(NODE) \
917 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
919 /* Nonzero if a label has been added to the statement list. */
920 #define STATEMENT_LIST_HAS_LABEL(NODE) \
921 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
923 /* C_MAYBE_CONST_EXPR accessors. */
924 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
925 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
926 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
927 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
928 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
929 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
930 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
931 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
932 #define EXPR_INT_CONST_OPERANDS(EXPR) \
933 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
934 && (TREE_CODE (EXPR) == INTEGER_CST \
935 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
936 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
938 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
939 #define DECL_C_BIT_FIELD(NODE) \
940 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
941 #define SET_DECL_C_BIT_FIELD(NODE) \
942 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
943 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
944 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
946 extern tree
do_case (location_t
, tree
, tree
);
947 extern tree
build_stmt (location_t
, enum tree_code
, ...);
948 extern tree
build_case_label (location_t
, tree
, tree
, tree
);
950 /* These functions must be defined by each front-end which implements
951 a variant of the C language. They are used in c-common.c. */
953 extern tree
build_unary_op (location_t
, enum tree_code
, tree
, int);
954 extern tree
build_binary_op (location_t
, enum tree_code
, tree
, tree
, int);
955 extern tree
perform_integral_promotions (tree
);
957 /* These functions must be defined by each front-end which implements
958 a variant of the C language. They are used by port files. */
960 extern tree
default_conversion (tree
);
962 /* Given two integer or real types, return the type for their sum.
963 Given two compatible ANSI C types, returns the merged type. */
965 extern tree
common_type (tree
, tree
);
967 extern tree
decl_constant_value (tree
);
969 /* Handle increment and decrement of boolean types. */
970 extern tree
boolean_increment (enum tree_code
, tree
);
972 extern int case_compare (splay_tree_key
, splay_tree_key
);
974 extern tree
c_add_case_label (location_t
, splay_tree
, tree
, tree
, tree
, tree
);
976 extern void c_do_switch_warnings (splay_tree
, location_t
, tree
, tree
);
978 extern tree
build_function_call (location_t
, tree
, tree
);
980 extern tree
build_function_call_vec (location_t
, tree
,
981 VEC(tree
,gc
) *, VEC(tree
,gc
) *);
983 extern tree
resolve_overloaded_builtin (location_t
, tree
, VEC(tree
,gc
) *);
985 extern tree
finish_label_address_expr (tree
, location_t
);
987 /* Same function prototype, but the C and C++ front ends have
988 different implementations. Used in c-common.c. */
989 extern tree
lookup_label (tree
);
990 extern tree
lookup_name (tree
);
991 extern bool lvalue_p (const_tree
);
993 extern bool vector_targets_convertible_p (const_tree t1
, const_tree t2
);
994 extern bool vector_types_convertible_p (const_tree t1
, const_tree t2
, bool emit_lax_note
);
996 extern rtx
c_expand_expr (tree
, rtx
, enum machine_mode
, int, rtx
*);
998 extern void init_c_lex (void);
1000 extern void c_cpp_builtins (cpp_reader
*);
1001 extern void c_cpp_builtins_optimize_pragma (cpp_reader
*, tree
, tree
);
1003 /* Positive if an implicit `extern "C"' scope has just been entered;
1004 negative if such a scope has just been exited. */
1005 extern GTY(()) int pending_lang_change
;
1007 /* Information recorded about each file examined during compilation. */
1011 int time
; /* Time spent in the file. */
1013 /* Flags used only by C++.
1014 INTERFACE_ONLY nonzero means that we are in an "interface" section
1015 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
1016 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
1017 INTERFACE_ONLY is zero, it means that we are responsible for
1018 exporting definitions that others might need. */
1019 short interface_only
;
1020 short interface_unknown
;
1023 struct c_fileinfo
*get_fileinfo (const char *);
1024 extern void dump_time_statistics (void);
1026 extern bool c_dump_tree (void *, tree
);
1028 extern void verify_sequence_points (tree
);
1030 extern tree
fold_offsetof (tree
, tree
);
1032 /* Places where an lvalue, or modifiable lvalue, may be required.
1033 Used to select diagnostic messages in lvalue_error and
1043 extern void lvalue_error (enum lvalue_use
);
1045 extern int complete_array_type (tree
*, tree
, bool);
1047 extern tree
builtin_type_for_size (int, bool);
1049 extern void warn_array_subscript_with_type_char (tree
);
1050 extern void warn_about_parentheses (enum tree_code
,
1051 enum tree_code
, tree
,
1052 enum tree_code
, tree
);
1053 extern void warn_for_unused_label (tree label
);
1054 extern void warn_for_div_by_zero (location_t
, tree divisor
);
1055 extern void warn_for_sign_compare (location_t
,
1056 tree orig_op0
, tree orig_op1
,
1059 enum tree_code resultcode
);
1060 extern void set_underlying_type (tree x
);
1061 extern bool is_typedef_decl (tree x
);
1062 extern VEC(tree
,gc
) *make_tree_vector (void);
1063 extern void release_tree_vector (VEC(tree
,gc
) *);
1064 extern VEC(tree
,gc
) *make_tree_vector_single (tree
);
1065 extern VEC(tree
,gc
) *make_tree_vector_copy (const VEC(tree
,gc
) *);
1067 /* In c-gimplify.c */
1068 extern void c_genericize (tree
);
1069 extern int c_gimplify_expr (tree
*, gimple_seq
*, gimple_seq
*);
1070 extern tree
c_build_bind_expr (location_t
, tree
, tree
);
1073 extern void pch_init (void);
1074 extern int c_common_valid_pch (cpp_reader
*pfile
, const char *name
, int fd
);
1075 extern void c_common_read_pch (cpp_reader
*pfile
, const char *name
, int fd
,
1077 extern void c_common_write_pch (void);
1078 extern void c_common_no_more_pch (void);
1079 extern void c_common_pch_pragma (cpp_reader
*pfile
, const char *);
1080 extern void c_common_print_pch_checksum (FILE *f
);
1082 /* In *-checksum.c */
1083 extern const unsigned char executable_checksum
[16];
1085 /* In c-cppbuiltin.c */
1086 extern void builtin_define_std (const char *macro
);
1087 extern void builtin_define_with_value (const char *, const char *, int);
1088 extern void c_stddef_cpp_builtins (void);
1089 extern void fe_file_change (const struct line_map
*);
1090 extern void c_parse_error (const char *, enum cpp_ttype
, tree
, unsigned char);
1092 /* Objective-C / Objective-C++ entry points. */
1094 /* The following ObjC/ObjC++ functions are called by the C and/or C++
1095 front-ends; they all must have corresponding stubs in stub-objc.c. */
1096 extern tree
objc_is_class_name (tree
);
1097 extern tree
objc_is_object_ptr (tree
);
1098 extern void objc_check_decl (tree
);
1099 extern int objc_is_reserved_word (tree
);
1100 extern bool objc_compare_types (tree
, tree
, int, tree
);
1101 extern void objc_volatilize_decl (tree
);
1102 extern bool objc_type_quals_match (tree
, tree
);
1103 extern tree
objc_rewrite_function_call (tree
, tree
);
1104 extern tree
objc_message_selector (void);
1105 extern tree
objc_lookup_ivar (tree
, tree
);
1106 extern void objc_clear_super_receiver (void);
1107 extern int objc_is_public (tree
, tree
);
1108 extern tree
objc_is_id (tree
);
1109 extern void objc_declare_alias (tree
, tree
);
1110 extern void objc_declare_class (tree
);
1111 extern void objc_declare_protocols (tree
);
1112 extern tree
objc_build_message_expr (tree
);
1113 extern tree
objc_finish_message_expr (tree
, tree
, tree
);
1114 extern tree
objc_build_selector_expr (location_t
, tree
);
1115 extern tree
objc_build_protocol_expr (tree
);
1116 extern tree
objc_build_encode_expr (tree
);
1117 extern tree
objc_build_string_object (tree
);
1118 extern tree
objc_get_protocol_qualified_type (tree
, tree
);
1119 extern tree
objc_get_class_reference (tree
);
1120 extern tree
objc_get_class_ivars (tree
);
1121 extern void objc_start_class_interface (tree
, tree
, tree
);
1122 extern void objc_start_category_interface (tree
, tree
, tree
);
1123 extern void objc_start_protocol (tree
, tree
);
1124 extern void objc_continue_interface (void);
1125 extern void objc_finish_interface (void);
1126 extern void objc_start_class_implementation (tree
, tree
);
1127 extern void objc_start_category_implementation (tree
, tree
);
1128 extern void objc_continue_implementation (void);
1129 extern void objc_finish_implementation (void);
1130 extern void objc_set_visibility (int);
1131 extern void objc_set_method_type (enum tree_code
);
1132 extern tree
objc_build_method_signature (tree
, tree
, tree
, bool);
1133 extern void objc_add_method_declaration (tree
);
1134 extern void objc_start_method_definition (tree
);
1135 extern void objc_finish_method_definition (tree
);
1136 extern void objc_add_instance_variable (tree
);
1137 extern tree
objc_build_keyword_decl (tree
, tree
, tree
);
1138 extern tree
objc_build_throw_stmt (location_t
, tree
);
1139 extern void objc_begin_try_stmt (location_t
, tree
);
1140 extern tree
objc_finish_try_stmt (void);
1141 extern void objc_begin_catch_clause (tree
);
1142 extern void objc_finish_catch_clause (void);
1143 extern void objc_build_finally_clause (location_t
, tree
);
1144 extern tree
objc_build_synchronized (location_t
, tree
, tree
);
1145 extern int objc_static_init_needed_p (void);
1146 extern tree
objc_generate_static_init_call (tree
);
1147 extern tree
objc_generate_write_barrier (tree
, enum tree_code
, tree
);
1149 /* The following are provided by the C and C++ front-ends, and called by
1151 extern void *objc_get_current_scope (void);
1152 extern void objc_mark_locals_volatile (void *);
1154 /* In c-ppoutput.c */
1155 extern void init_pp_output (FILE *);
1156 extern void preprocess_file (cpp_reader
*);
1157 extern void pp_file_change (const struct line_map
*);
1158 extern void pp_dir_change (cpp_reader
*, const char *);
1159 extern bool check_missing_format_attribute (tree
, tree
);
1162 extern tree
c_finish_omp_master (location_t
, tree
);
1163 extern tree
c_finish_omp_critical (location_t
, tree
, tree
);
1164 extern tree
c_finish_omp_ordered (location_t
, tree
);
1165 extern void c_finish_omp_barrier (location_t
);
1166 extern tree
c_finish_omp_atomic (location_t
, enum tree_code
, tree
, tree
);
1167 extern void c_finish_omp_flush (location_t
);
1168 extern void c_finish_omp_taskwait (location_t
);
1169 extern tree
c_finish_omp_for (location_t
, tree
, tree
, tree
, tree
, tree
, tree
);
1170 extern void c_split_parallel_clauses (location_t
, tree
, tree
*, tree
*);
1171 extern enum omp_clause_default_kind
c_omp_predetermined_sharing (tree
);
1173 /* Not in c-omp.c; provided by the front end. */
1174 extern bool c_omp_sharing_predetermined (tree
);
1175 extern tree
c_omp_remap_decl (tree
, bool);
1176 extern void record_types_used_by_current_var_decl (tree
);
1178 /* In order for the format checking to accept the C frontend
1179 diagnostic framework extensions, you must include this file before
1180 toplev.h, not after. The C front end formats are a subset of those
1181 for C++, so they are the appropriate set to use in common code;
1182 cp-tree.h overrides this for C++. */
1183 #ifndef GCC_DIAG_STYLE
1184 #define GCC_DIAG_STYLE __gcc_cdiag__
1187 #endif /* ! GCC_C_COMMON_H */