1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
25 #include "splay-tree.h"
28 /* Usage of TREE_LANG_FLAG_?:
29 0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
30 TREE_NEGATED_INT (in INTEGER_CST).
31 IDENTIFIER_MARKED (used by search routines).
32 SCOPE_BEGIN_P (in SCOPE_STMT)
33 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
34 NEW_FOR_SCOPE_P (in FOR_STMT)
35 ASM_INPUT_P (in ASM_STMT)
36 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
37 STMT_IS_FULL_EXPR_P (in _STMT)
38 2: STMT_LINENO_FOR_FN_P (in _STMT)
39 3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
40 4: SCOPE_PARTIAL_P (in SCOPE_STMT)
43 /* Reserved identifiers. This is the union of all the keywords for C,
44 C++, and Objective C. All the type modifiers have to be in one
45 block at the beginning, because they are used as mask bits. There
46 are 27 type modifiers; if we add many more we will have to redesign
47 the mask mechanism. */
52 /* C, in empirical order of frequency. */
54 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
55 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
56 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
59 RID_BOUNDED, RID_UNBOUNDED, RID_COMPLEX,
62 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
65 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
68 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
69 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
70 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
71 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
75 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
76 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_PTRBASE,
77 RID_PTREXTENT, RID_PTRVALUE,
79 /* Too many ways of getting the name of a function as a string */
80 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
83 RID_BOOL, RID_WCHAR, RID_CLASS,
84 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
85 RID_TEMPLATE, RID_NULL, RID_CATCH,
86 RID_DELETE, RID_FALSE, RID_NAMESPACE,
87 RID_NEW, RID_OPERATOR, RID_THIS,
88 RID_THROW, RID_TRUE, RID_TRY,
89 RID_TYPENAME, RID_TYPEID, RID_USING,
92 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
94 /* alternate spellings */
95 RID_AND, RID_AND_EQ, RID_NOT, RID_NOT_EQ,
96 RID_OR, RID_OR_EQ, RID_XOR, RID_XOR_EQ,
97 RID_BITAND, RID_BITOR, RID_COMPL,
100 RID_ID, RID_AT_ENCODE, RID_AT_END,
101 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
102 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
103 RID_AT_PROTOCOL, RID_AT_SELECTOR, RID_AT_INTERFACE,
104 RID_AT_IMPLEMENTATION,
108 RID_FIRST_MODIFIER = RID_STATIC,
109 RID_LAST_MODIFIER = RID_ONEWAY,
111 RID_FIRST_AT = RID_AT_ENCODE,
112 RID_LAST_AT = RID_AT_IMPLEMENTATION,
113 RID_FIRST_PQ = RID_IN,
114 RID_LAST_PQ = RID_ONEWAY
117 #define OBJC_IS_AT_KEYWORD(rid) \
118 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
119 (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
121 #define OBJC_IS_PQ_KEYWORD(rid) \
122 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
123 (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
125 /* The elements of `ridpointers' are identifier nodes for the reserved
126 type names and storage classes. It is indexed by a RID_... value. */
127 extern tree *ridpointers;
129 /* Standard named or nameless data types of the C compiler. */
134 CTI_SIGNED_WCHAR_TYPE,
135 CTI_UNSIGNED_WCHAR_TYPE,
137 CTI_C_SIZE_TYPE, /* The type used for the size_t typedef and the
138 result type of sizeof (an ordinary type without
139 TYPE_IS_SIZETYPE set, unlike the internal
141 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
142 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
145 CTI_WIDEST_INT_LIT_TYPE,
146 CTI_WIDEST_UINT_LIT_TYPE,
149 CTI_WCHAR_ARRAY_TYPE,
152 CTI_CONST_STRING_TYPE,
154 /* Type for boolean expressions (bool in C++, int in C). */
158 /* C99's _Bool type. */
162 CTI_DEFAULT_FUNCTION_TYPE,
164 CTI_G77_INTEGER_TYPE,
165 CTI_G77_UINTEGER_TYPE,
166 CTI_G77_LONGINT_TYPE,
167 CTI_G77_ULONGINT_TYPE,
169 /* These are not types, but we have to look them up all the time. */
170 CTI_FUNCTION_NAME_DECL,
171 CTI_PRETTY_FUNCTION_NAME_DECL,
172 CTI_C99_FUNCTION_NAME_DECL,
173 CTI_SAVED_FUNCTION_NAME_DECLS,
180 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->rid_code)
182 /* Identifier part common to the C front ends. Inherits from
183 tree_identifier, despite appearances. */
184 struct c_common_identifier
186 struct tree_common common;
187 struct cpp_hashnode node;
188 ENUM_BITFIELD(rid) rid_code: CHAR_BIT;
191 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
192 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
193 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
194 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
195 #define c_size_type_node c_global_trees[CTI_C_SIZE_TYPE]
196 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
197 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
198 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
199 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
200 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
201 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
203 #define boolean_type_node c_global_trees[CTI_BOOLEAN_TYPE]
204 #define boolean_true_node c_global_trees[CTI_BOOLEAN_TRUE]
205 #define boolean_false_node c_global_trees[CTI_BOOLEAN_FALSE]
207 #define c_bool_type_node c_global_trees[CTI_C_BOOL_TYPE]
208 #define c_bool_true_node c_global_trees[CTI_C_BOOL_TRUE]
209 #define c_bool_false_node c_global_trees[CTI_C_BOOL_FALSE]
211 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
212 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
213 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
214 #define string_type_node c_global_trees[CTI_STRING_TYPE]
215 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
217 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
219 /* g77 integer types, which which must be kept in sync with f/com.h */
220 #define g77_integer_type_node c_global_trees[CTI_G77_INTEGER_TYPE]
221 #define g77_uinteger_type_node c_global_trees[CTI_G77_UINTEGER_TYPE]
222 #define g77_longint_type_node c_global_trees[CTI_G77_LONGINT_TYPE]
223 #define g77_ulongint_type_node c_global_trees[CTI_G77_ULONGINT_TYPE]
225 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
226 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
227 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
228 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
230 /* A node for `((void) 0)'. */
231 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
233 extern tree c_global_trees[CTI_MAX];
235 /* Mark which labels are explicitly declared.
236 These may be shadowed, and may be referenced from nested functions. */
237 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
239 typedef enum c_language_kind
241 clk_c, /* A dialect of C: K&R C, ANSI/ISO C89, C2000,
243 clk_cplusplus, /* ANSI/ISO C++ */
244 clk_objective_c /* Objective C */
248 /* Information about a statement tree. */
251 /* The last statement added to the tree. */
253 /* The type of the last expression statement. (This information is
254 needed to implement the statement-expression extension.) */
255 tree x_last_expr_type;
256 /* In C++, Non-zero if we should treat statements as full
257 expressions. In particular, this variable is no-zero if at the
258 end of a statement we should destroy any temporaries created
259 during that statement. Similarly, if, at the end of a block, we
260 should destroy any local variables in this block. Normally, this
261 variable is non-zero, since those are the normal semantics of
264 However, in order to represent aggregate initialization code as
265 tree structure, we use statement-expressions. The statements
266 within the statement expression should not result in cleanups
267 being run until the entire enclosing statement is complete.
269 This flag has no effect in C. */
270 int stmts_are_full_exprs_p;
273 typedef struct stmt_tree_s *stmt_tree;
275 /* Global state pertinent to the current function. Some C dialects
276 extend this structure with additional fields. */
278 struct language_function {
279 /* While we are parsing the function, this contains information
280 about the statement-tree that we are building. */
281 struct stmt_tree_s x_stmt_tree;
282 /* The stack of SCOPE_STMTs for the current function. */
283 tree x_scope_stmt_stack;
286 /* When building a statement-tree, this is the last statement added to
289 #define last_tree (current_stmt_tree ()->x_last_stmt)
291 /* The type of the last expression-statement we have seen. */
293 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
295 /* LAST_TREE contains the last statement parsed. These are chained
296 together through the TREE_CHAIN field, but often need to be
297 re-organized since the parse is performed bottom-up. This macro
298 makes LAST_TREE the indicated SUBSTMT of STMT. */
300 #define RECHAIN_STMTS(stmt, substmt) \
302 substmt = TREE_CHAIN (stmt); \
303 TREE_CHAIN (stmt) = NULL_TREE; \
307 /* Language-specific hooks. */
309 extern int (*lang_statement_code_p) PARAMS ((enum tree_code));
310 extern void (*lang_expand_stmt) PARAMS ((tree));
311 extern void (*lang_expand_decl_stmt) PARAMS ((tree));
312 extern void (*lang_expand_function_end) PARAMS ((void));
314 /* Callback that determines if it's ok for a function to have no
315 noreturn attribute. */
316 extern int (*lang_missing_noreturn_ok_p) PARAMS ((tree));
319 /* The type of a function that walks over tree structure. */
321 typedef tree (*walk_tree_fn) PARAMS ((tree *,
325 extern stmt_tree current_stmt_tree PARAMS ((void));
326 extern tree *current_scope_stmt_stack PARAMS ((void));
327 extern void begin_stmt_tree PARAMS ((tree *));
328 extern tree add_stmt PARAMS ((tree));
329 extern void add_decl_stmt PARAMS ((tree));
330 extern tree add_scope_stmt PARAMS ((int, int));
331 extern void finish_stmt_tree PARAMS ((tree *));
333 extern int statement_code_p PARAMS ((enum tree_code));
334 extern tree walk_stmt_tree PARAMS ((tree *,
337 extern void prep_stmt PARAMS ((tree));
338 extern void expand_stmt PARAMS ((tree));
339 extern void mark_stmt_tree PARAMS ((void *));
341 /* Extra information associated with a DECL. Other C dialects extend
342 this structure in various ways. The C front-end only uses this
343 structure for FUNCTION_DECLs; all other DECLs have a NULL
344 DECL_LANG_SPECIFIC field. */
347 /* In a FUNCTION_DECL, this is DECL_SAVED_TREE. */
351 /* In a FUNCTION_DECL, the saved representation of the body of the
352 entire function. Usually a COMPOUND_STMT, but in C++ this may also
353 be a RETURN_INIT, CTOR_INITIALIZER, or TRY_BLOCK. */
354 #define DECL_SAVED_TREE(NODE) \
355 (((struct c_lang_decl *) DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE))) \
358 /* In a FUNCTION_DECL for which DECL_BUILT_IN does not hold, this is
359 the approximate number of statements in this function. There is
360 no need for this number to be exact; it is only used in various
361 heuristics regarding optimization. */
362 #define DECL_NUM_STMTS(NODE) \
363 (FUNCTION_DECL_CHECK (NODE)->decl.u1.i)
365 extern void c_mark_lang_decl PARAMS ((struct c_lang_decl *));
367 /* The variant of the C language being processed. Each C language
368 front-end defines this variable. */
370 extern c_language_kind c_language;
372 /* Nonzero means give string constants the type `const char *', rather
375 extern int flag_const_strings;
377 /* Nonzero means give `double' the same size as `float'. */
379 extern int flag_short_double;
381 /* Nonzero means give `wchar_t' the same size as `short'. */
383 extern int flag_short_wchar;
385 /* Warn about *printf or *scanf format/argument anomalies. */
387 extern int warn_format;
389 /* Warn about Y2K problems with strftime formats. */
391 extern int warn_format_y2k;
393 /* Warn about excess arguments to formats. */
395 extern int warn_format_extra_args;
397 /* Warn about non-literal format arguments. */
399 extern int warn_format_nonliteral;
401 /* Warn about possible security problems with calls to format functions. */
403 extern int warn_format_security;
405 /* Warn about possible violations of sequence point rules. */
407 extern int warn_sequence_point;
409 /* Warn about functions which might be candidates for format attributes. */
411 extern int warn_missing_format_attribute;
413 /* Nonzero means do some things the same way PCC does. */
415 extern int flag_traditional;
417 /* Nonzero means enable C89 Amendment 1 features. */
419 extern int flag_isoc94;
421 /* Nonzero means use the ISO C99 dialect of C. */
423 extern int flag_isoc99;
425 /* Nonzero means environment is hosted (i.e., not freestanding) */
427 extern int flag_hosted;
429 /* Nonzero means add default format_arg attributes for functions not
432 extern int flag_noniso_default_format_attributes;
434 /* Nonzero means don't recognize any builtin functions. */
436 extern int flag_no_builtin;
438 /* Nonzero means don't recognize the non-ANSI builtin functions.
441 extern int flag_no_nonansi_builtin;
443 /* Nonzero means warn about suggesting putting in ()'s. */
445 extern int warn_parentheses;
447 /* Warn if a type conversion is done that might have confusing results. */
449 extern int warn_conversion;
451 /* Nonzero means warn about usage of long long,
452 when `-pedantic' and not C99. */
454 extern int warn_long_long;
456 /* C types are partitioned into three subsets: object, function, and
458 #define C_TYPE_OBJECT_P(type) \
459 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
461 #define C_TYPE_INCOMPLETE_P(type) \
462 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
464 #define C_TYPE_FUNCTION_P(type) \
465 (TREE_CODE (type) == FUNCTION_TYPE)
467 /* Return the qualifiers that apply to this type. In C++, that means
468 descending through array types. Note that this macro evaluates its
469 arguments mor than once. */
470 #define C_TYPE_QUALS(TYPE) \
471 (TYPE_QUALS ((TREE_CODE (TYPE) == ARRAY_TYPE \
472 && c_language == clk_cplusplus) \
473 ? strip_array_types (TYPE) : TYPE))
475 /* For convenience we define a single macro to identify the class of
476 object or incomplete types. */
477 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
478 (!C_TYPE_FUNCTION_P (type))
480 /* Record in each node resulting from a binary operator
481 what operator was specified for it. */
482 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
484 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
485 ID is the identifier to use, NAME is the string.
486 TYPE_DEP indicates whether it depends on type of the function or not
487 (i.e. __PRETTY_FUNCTION__). */
489 extern tree (*make_fname_decl) PARAMS ((tree, int));
491 extern tree identifier_global_value PARAMS ((tree));
492 extern void record_builtin_type PARAMS ((enum rid,
493 const char *, tree));
494 extern tree build_void_list_node PARAMS ((void));
495 extern void start_fname_decls PARAMS ((void));
496 extern void finish_fname_decls PARAMS ((void));
497 extern const char *fname_as_string PARAMS ((int));
498 extern tree fname_decl PARAMS ((unsigned, tree));
499 extern const char *fname_string PARAMS ((unsigned));
501 /* Flags that may be passed in the third argument of decl_attributes. */
504 /* The type passed in is the type of a DECL, and any attributes that
505 should be passed in again to be applied to the DECL rather than the
506 type should be returned. */
507 ATTR_FLAG_DECL_NEXT = 1,
508 /* The type passed in is a function return type, and any attributes that
509 should be passed in again to be applied to the function type rather
510 than the return type should be returned. */
511 ATTR_FLAG_FUNCTION_NEXT = 2,
512 /* The type passed in is an array element type, and any attributes that
513 should be passed in again to be applied to the array type rather
514 than the element type should be returned. */
515 ATTR_FLAG_ARRAY_NEXT = 4
518 extern tree decl_attributes PARAMS ((tree *, tree, int));
519 extern void init_function_format_info PARAMS ((void));
520 extern void check_function_format PARAMS ((int *, tree, tree, tree));
521 extern void set_Wformat PARAMS ((int));
522 extern void decl_handle_format_attribute PARAMS ((tree, tree));
523 extern void decl_handle_format_arg_attribute PARAMS ((tree, tree));
524 extern void c_apply_type_quals_to_decl PARAMS ((int, tree));
525 /* Print an error message for invalid operands to arith operation CODE.
526 NOP_EXPR is used as a special case (see truthvalue_conversion). */
527 extern void binary_op_error PARAMS ((enum tree_code));
528 extern tree c_expand_expr_stmt PARAMS ((tree));
529 extern void c_expand_start_cond PARAMS ((tree, int));
530 extern void c_finish_then PARAMS ((void));
531 extern void c_expand_start_else PARAMS ((void));
532 extern void c_finish_else PARAMS ((void));
533 extern void c_expand_end_cond PARAMS ((void));
534 /* Validate the expression after `case' and apply default promotions. */
535 extern tree check_case_value PARAMS ((tree));
536 /* Concatenate a list of STRING_CST nodes into one STRING_CST. */
537 extern tree combine_strings PARAMS ((tree));
538 extern void constant_expression_warning PARAMS ((tree));
539 extern tree convert_and_check PARAMS ((tree, tree));
540 extern void overflow_warning PARAMS ((tree));
541 extern void unsigned_conversion_warning PARAMS ((tree, tree));
543 /* Read the rest of the current #-directive line. */
544 extern char *get_directive_line PARAMS ((void));
545 #define GET_DIRECTIVE_LINE() get_directive_line ()
547 /* Subroutine of build_binary_op, used for comparison operations.
548 See if the operands have both been converted from subword integer types
549 and, if so, perhaps change them both back to their original type. */
550 extern tree shorten_compare PARAMS ((tree *, tree *, tree *, enum tree_code *));
552 extern unsigned int min_precision PARAMS ((tree, int));
554 /* Add qualifiers to a type, in the fashion for C. */
555 extern tree c_build_qualified_type PARAMS ((tree, int));
557 /* Build tree nodes and builtin functions common to both C and C++ language
559 extern void c_common_nodes_and_builtins PARAMS ((void));
561 extern tree build_va_arg PARAMS ((tree, tree));
563 extern void c_common_lang_init PARAMS ((void));
565 extern bool c_promoting_integer_type_p PARAMS ((tree));
566 extern int self_promoting_args_p PARAMS ((tree));
567 extern tree simple_type_promotes_to PARAMS ((tree));
568 extern tree strip_array_types PARAMS ((tree));
570 /* These macros provide convenient access to the various _STMT nodes. */
572 /* Nonzero if this statement should be considered a full-expression,
573 i.e., if temporaries created during this statement should have
574 their destructors run at the end of this statement. (In C, this
575 will always be false, since there are no destructors.) */
576 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
578 /* IF_STMT accessors. These give access to the condtion of the if
579 statement, the then block of the if statement, and the else block
580 of the if stsatement if it exists. */
581 #define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
582 #define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
583 #define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
585 /* WHILE_STMT accessors. These give access to the condtion of the
586 while statement and the body of the while statement, respectively. */
587 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
588 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
590 /* DO_STMT accessors. These give access to the condition of the do
591 statement and the body of the do statement, respectively. */
592 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
593 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
595 /* RETURN_STMT accessors. These give the expression associated with a
596 return statement, and whether it should be ignored when expanding
597 (as opposed to inlining). */
598 #define RETURN_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
600 /* EXPR_STMT accessor. This gives the expression associated with an
601 expression statement. */
602 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
604 /* FOR_STMT accessors. These give access to the init statement,
605 condition, update expression, and body of the for statement,
607 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
608 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
609 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
610 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
612 /* SWITCH_STMT accessors. These give access to the condition and body
613 of the switch statement, respectively. */
614 #define SWITCH_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
615 #define SWITCH_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
617 /* CASE_LABEL accessors. These give access to the high and low values
618 of a case label, respectively. */
619 #define CASE_LOW(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
620 #define CASE_HIGH(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
621 #define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
623 /* GOTO_STMT accessor. This gives access to the label associated with
625 #define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
627 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
628 statements assocated with a compound statement. The result is the
629 first statement in the list. Succeeding nodes can be acccessed by
630 calling TREE_CHAIN on a node in the list. */
631 #define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
633 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
634 instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
635 ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
637 #define ASM_CV_QUAL(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
638 #define ASM_STRING(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
639 #define ASM_OUTPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
640 #define ASM_INPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
641 #define ASM_CLOBBERS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
643 /* DECL_STMT accessor. This gives access to the DECL associated with
644 the given declaration statement. */
645 #define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
647 /* STMT_EXPR accessor. */
648 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
650 /* LABEL_STMT accessor. This gives access to the label associated with
651 the given label statement. */
652 #define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
654 /* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
655 #define SCOPE_BEGIN_P(NODE) \
656 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
658 /* Nonzero if this SCOPE_STMT is for the end of a scope. */
659 #define SCOPE_END_P(NODE) \
660 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
662 /* The BLOCK containing the declarations contained in this scope. */
663 #define SCOPE_STMT_BLOCK(NODE) \
664 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
666 /* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
667 #define SCOPE_NULLIFIED_P(NODE) \
668 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
670 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
671 which should be treated as non-existant from the point of view of
672 running cleanup actions. */
673 #define SCOPE_NO_CLEANUPS_P(NODE) \
674 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
676 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
684 there is (implicitly) a new scope after `l', even though there are
685 no curly braces. In particular, when we hit the goto, we must
686 destroy s2 and then re-construct it. For the implicit scope,
687 SCOPE_PARTIAL_P will be set. */
688 #define SCOPE_PARTIAL_P(NODE) \
689 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
691 /* Nonzero for an ASM_STMT if the assembly statement is volatile. */
692 #define ASM_VOLATILE_P(NODE) \
693 (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
695 /* The line-number at which a statement began. But if
696 STMT_LINENO_FOR_FN_P does holds, then this macro gives the
697 line number for the end of the current function instead. */
698 #define STMT_LINENO(NODE) \
699 (TREE_COMPLEXITY ((NODE)))
701 /* If non-zero, the STMT_LINENO for NODE is the line at which the
703 #define STMT_LINENO_FOR_FN_P(NODE) \
704 (TREE_LANG_FLAG_2 ((NODE)))
706 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
707 initialization variables. */
708 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
710 /* Nonzero if we want to create an ASM_INPUT instead of an
711 ASM_OPERAND with no operands. */
712 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
714 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
717 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
718 #include "c-common.def"
724 extern void add_c_tree_codes PARAMS ((void));
725 extern void genrtl_do_pushlevel PARAMS ((void));
726 extern void genrtl_goto_stmt PARAMS ((tree));
727 extern void genrtl_expr_stmt PARAMS ((tree));
728 extern void genrtl_decl_stmt PARAMS ((tree));
729 extern void genrtl_if_stmt PARAMS ((tree));
730 extern void genrtl_while_stmt PARAMS ((tree));
731 extern void genrtl_do_stmt PARAMS ((tree));
732 extern void genrtl_return_stmt PARAMS ((tree));
733 extern void genrtl_for_stmt PARAMS ((tree));
734 extern void genrtl_break_stmt PARAMS ((void));
735 extern void genrtl_continue_stmt PARAMS ((void));
736 extern void genrtl_scope_stmt PARAMS ((tree));
737 extern void genrtl_switch_stmt PARAMS ((tree));
738 extern void genrtl_case_label PARAMS ((tree));
739 extern void genrtl_compound_stmt PARAMS ((tree));
740 extern void genrtl_asm_stmt PARAMS ((tree, tree,
743 extern void genrtl_decl_cleanup PARAMS ((tree, tree));
744 extern int stmts_are_full_exprs_p PARAMS ((void));
745 extern int anon_aggr_type_p PARAMS ((tree));
747 /* For a VAR_DECL that is an anonymous union, these are the various
748 sub-variables that make up the anonymous union. */
749 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
751 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
752 #define DECL_C_BIT_FIELD(NODE) \
753 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
754 #define SET_DECL_C_BIT_FIELD(NODE) \
755 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
756 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
757 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
759 /* In a VAR_DECL, nonzero if the decl is a register variable with
760 an explicit asm specification. */
761 #define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
763 extern void emit_local_var PARAMS ((tree));
764 extern void make_rtl_for_local_static PARAMS ((tree));
765 extern tree expand_cond PARAMS ((tree));
766 extern tree c_expand_return PARAMS ((tree));
767 extern tree do_case PARAMS ((tree, tree));
768 extern tree build_stmt PARAMS ((enum tree_code, ...));
769 extern tree build_case_label PARAMS ((tree, tree, tree));
770 extern tree build_continue_stmt PARAMS ((void));
771 extern tree build_break_stmt PARAMS ((void));
772 extern tree build_return_stmt PARAMS ((tree));
774 #define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
776 extern void c_expand_asm_operands PARAMS ((tree, tree, tree, tree, int, const char *, int));
778 /* These functions must be defined by each front-end which implements
779 a variant of the C language. They are used in c-common.c. */
781 extern tree build_unary_op PARAMS ((enum tree_code,
783 extern tree build_binary_op PARAMS ((enum tree_code,
785 extern int lvalue_p PARAMS ((tree));
786 extern tree default_conversion PARAMS ((tree));
788 /* Given two integer or real types, return the type for their sum.
789 Given two compatible ANSI C types, returns the merged type. */
791 extern tree common_type PARAMS ((tree, tree));
793 extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
795 extern tree decl_constant_value PARAMS ((tree));
797 /* Handle increment and decrement of boolean types. */
798 extern tree boolean_increment PARAMS ((enum tree_code,
801 /* Hook currently used only by the C++ front end to reset internal state
802 after entering or leaving a header file. */
803 extern void extract_interface_info PARAMS ((void));
805 extern void mark_c_language_function PARAMS ((struct language_function *));
807 extern int case_compare PARAMS ((splay_tree_key,
810 extern tree c_add_case_label PARAMS ((splay_tree,
814 extern tree build_function_call PARAMS ((tree, tree));
816 extern tree finish_label_address_expr PARAMS ((tree));
818 /* Same function prototype, but the C and C++ front ends have
819 different implementations. Used in c-common.c. */
820 extern tree lookup_label PARAMS ((tree));
822 /* If this variable is defined to a non-NULL value, it will be called
823 after the file has been completely parsed. The argument will be
824 the GLOBAL_NAMESPACE in C++, or the list of top-level declarations
826 extern void (*back_end_hook) PARAMS ((tree));
830 extern struct rtx_def *c_expand_expr PARAMS ((tree, rtx,
832 enum expand_modifier));
834 extern int c_safe_from_p PARAMS ((rtx, tree));
837 extern int c_unsafe_for_reeval PARAMS ((tree));
841 /* Different tree dump places. */
844 TDI_all, /* dump the whole translation unit */
845 TDI_class, /* dump class heirarchy */
846 TDI_original, /* dump each function before optimizing it */
847 TDI_optimized, /* dump each function after optimizing it */
848 TDI_inlined, /* dump each function after inlining
853 /* Bit masks to control tree dumping. */
854 #define TDF_ADDRESS (1 << 0) /* dump node addresses */
855 #define TDF_SLIM (1 << 1) /* don't go wild following links */
857 typedef struct dump_info *dump_info_p;
859 /* A callback function used dump language-specific parts of tree
860 nodes. Returns non-zero if it does not want the usual dumping of
861 the second argument. */
863 typedef int (*dump_tree_fn) PARAMS ((dump_info_p, tree));
865 extern dump_tree_fn lang_dump_tree;
867 extern int dump_flag PARAMS ((dump_info_p, int, tree));
868 extern int dump_enabled_p PARAMS ((enum tree_dump_index));
869 extern FILE *dump_begin PARAMS ((enum tree_dump_index, int *));
870 extern void dump_end PARAMS ((enum tree_dump_index, FILE *));
871 extern void dump_node PARAMS ((tree, int, FILE *));
872 extern int dump_switch_p PARAMS ((const char *));
873 extern const char *dump_flag_name PARAMS ((enum tree_dump_index));
875 /* Information recorded about each file examined during compilation. */
879 int time; /* Time spent in the file. */
880 short interface_only; /* Flags - used only by C++ */
881 short interface_unknown;
884 struct c_fileinfo *get_fileinfo PARAMS ((const char *));
885 extern void dump_time_statistics PARAMS ((void));
887 #endif /* ! GCC_C_COMMON_H */