]> git.ipfire.org Git - thirdparty/gcc.git/blame - gcc/c-common.h
Really reverted erroneous checkin
[thirdparty/gcc.git] / gcc / c-common.h
CommitLineData
7f4edbcb 1/* Definitions for c-common.c.
517cbe13
JL
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
7f4edbcb
BS
4
5This file is part of GNU CC.
6
7GNU CC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU CC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU CC; see the file COPYING. If not, write to
19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA. */
21
0e5921e8
ZW
22#ifndef GCC_C_COMMON_H
23#define GCC_C_COMMON_H
24
8f17b5c5
MM
25#include "splay-tree.h"
26
f2c5f623
BC
27/* Usage of TREE_LANG_FLAG_?:
28 0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
29 TREE_NEGATED_INT (in INTEGER_CST).
30 IDENTIFIER_MARKED (used by search routines).
31 SCOPE_BEGIN_P (in SCOPE_STMT)
32 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
33 NEW_FOR_SCOPE_P (in FOR_STMT)
34 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
35 STMT_IS_FULL_EXPR_P (in _STMT)
36 2: STMT_LINENO_FOR_FN_P (in _STMT)
37 3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
38 4: SCOPE_PARTIAL_P (in SCOPE_STMT)
39*/
40
0e5921e8
ZW
41/* Reserved identifiers. This is the union of all the keywords for C,
42 C++, and Objective C. All the type modifiers have to be in one
43 block at the beginning, because they are used as mask bits. There
44 are 27 type modifiers; if we add many more we will have to redesign
45 the mask mechanism. */
f09f1de5
MM
46
47enum rid
48{
0e5921e8
ZW
49 /* Modifiers: */
50 /* C, in empirical order of frequency. */
51 RID_STATIC = 0,
52 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
53 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
54 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
55
56 /* C extensions */
57 RID_BOUNDED, RID_UNBOUNDED, RID_COMPLEX,
58
59 /* C++ */
60 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
61
62 /* ObjC */
63 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
64
65 /* C */
66 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
67 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
68 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
69 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
70 RID_SIZEOF,
71
72 /* C extensions */
73 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
74 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_PTRBASE,
75 RID_PTREXTENT, RID_PTRVALUE,
76
77 /* C++ */
78 RID_BOOL, RID_WCHAR, RID_CLASS,
79 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
80 RID_TEMPLATE, RID_NULL, RID_CATCH,
81 RID_DELETE, RID_FALSE, RID_NAMESPACE,
82 RID_NEW, RID_OPERATOR, RID_THIS,
83 RID_THROW, RID_TRUE, RID_TRY,
84 RID_TYPENAME, RID_TYPEID, RID_USING,
85
86 /* casts */
87 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
88
89 /* alternate spellings */
90 RID_AND, RID_AND_EQ, RID_NOT, RID_NOT_EQ,
91 RID_OR, RID_OR_EQ, RID_XOR, RID_XOR_EQ,
92 RID_BITAND, RID_BITOR, RID_COMPL,
93
94 /* Objective C */
95 RID_ID, RID_AT_ENCODE, RID_AT_END,
96 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
97 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
98 RID_AT_PROTOCOL, RID_AT_SELECTOR, RID_AT_INTERFACE,
99 RID_AT_IMPLEMENTATION,
100
101 RID_MAX,
102
103 RID_FIRST_MODIFIER = RID_STATIC,
104 RID_LAST_MODIFIER = RID_ONEWAY
f09f1de5
MM
105};
106
f09f1de5
MM
107/* The elements of `ridpointers' are identifier nodes for the reserved
108 type names and storage classes. It is indexed by a RID_... value. */
109extern tree *ridpointers;
110
7f4edbcb
BS
111/* Standard named or nameless data types of the C compiler. */
112
113enum c_tree_index
114{
7f4edbcb
BS
115 CTI_WCHAR_TYPE,
116 CTI_SIGNED_WCHAR_TYPE,
117 CTI_UNSIGNED_WCHAR_TYPE,
c5ab7f91 118 CTI_WINT_TYPE,
fe8ca71f
JM
119 CTI_C_SIZE_TYPE, /* The type used for the size_t typedef and the
120 result type of sizeof (an ordinary type without
121 TYPE_IS_SIZETYPE set, unlike the internal
122 sizetype). */
cd732418
JM
123 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
124 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
b15ad712
JM
125 CTI_INTMAX_TYPE,
126 CTI_UINTMAX_TYPE,
7f4edbcb
BS
127 CTI_WIDEST_INT_LIT_TYPE,
128 CTI_WIDEST_UINT_LIT_TYPE,
129
7f4edbcb
BS
130 CTI_CHAR_ARRAY_TYPE,
131 CTI_WCHAR_ARRAY_TYPE,
132 CTI_INT_ARRAY_TYPE,
133 CTI_STRING_TYPE,
134 CTI_CONST_STRING_TYPE,
135
19552aa5 136 /* Type for boolean expressions (bool in C++, int in C). */
7f4edbcb
BS
137 CTI_BOOLEAN_TYPE,
138 CTI_BOOLEAN_TRUE,
139 CTI_BOOLEAN_FALSE,
19552aa5
JM
140 /* C99's _Bool type. */
141 CTI_C_BOOL_TYPE,
142 CTI_C_BOOL_TRUE,
143 CTI_C_BOOL_FALSE,
7f4edbcb
BS
144 CTI_DEFAULT_FUNCTION_TYPE,
145 CTI_VOID_LIST,
146
147 CTI_VOID_FTYPE,
148 CTI_VOID_FTYPE_PTR,
149 CTI_INT_FTYPE_INT,
150 CTI_PTR_FTYPE_SIZETYPE,
7aba5a5f
CD
151
152 CTI_G77_INTEGER_TYPE,
153 CTI_G77_UINTEGER_TYPE,
154 CTI_G77_LONGINT_TYPE,
155 CTI_G77_ULONGINT_TYPE,
156
63ad61ed
ZW
157 /* These are not types, but we have to look them up all the time. */
158 CTI_FUNCTION_ID,
159 CTI_PRETTY_FUNCTION_ID,
160 CTI_FUNC_ID,
161
ae499cce
MM
162 CTI_VOID_ZERO,
163
7f4edbcb
BS
164 CTI_MAX
165};
166
7f4edbcb
BS
167#define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
168#define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
169#define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
c5ab7f91 170#define wint_type_node c_global_trees[CTI_WINT_TYPE]
3c786c69 171#define c_size_type_node c_global_trees[CTI_C_SIZE_TYPE]
cd732418
JM
172#define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
173#define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
b15ad712
JM
174#define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
175#define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
7f4edbcb
BS
176#define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
177#define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
178
7f4edbcb
BS
179#define boolean_type_node c_global_trees[CTI_BOOLEAN_TYPE]
180#define boolean_true_node c_global_trees[CTI_BOOLEAN_TRUE]
181#define boolean_false_node c_global_trees[CTI_BOOLEAN_FALSE]
182
19552aa5
JM
183#define c_bool_type_node c_global_trees[CTI_C_BOOL_TYPE]
184#define c_bool_true_node c_global_trees[CTI_C_BOOL_TRUE]
185#define c_bool_false_node c_global_trees[CTI_C_BOOL_FALSE]
186
7f4edbcb
BS
187#define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
188#define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
189#define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
190#define string_type_node c_global_trees[CTI_STRING_TYPE]
191#define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
192
193#define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
194#define void_list_node c_global_trees[CTI_VOID_LIST]
195#define void_ftype c_global_trees[CTI_VOID_FTYPE]
196#define void_ftype_ptr c_global_trees[CTI_VOID_FTYPE_PTR]
197#define int_ftype_int c_global_trees[CTI_INT_FTYPE_INT]
198#define ptr_ftype_sizetype c_global_trees[CTI_PTR_FTYPE_SIZETYPE]
199
7aba5a5f
CD
200/* g77 integer types, which which must be kept in sync with f/com.h */
201#define g77_integer_type_node c_global_trees[CTI_G77_INTEGER_TYPE]
202#define g77_uinteger_type_node c_global_trees[CTI_G77_UINTEGER_TYPE]
203#define g77_longint_type_node c_global_trees[CTI_G77_LONGINT_TYPE]
204#define g77_ulongint_type_node c_global_trees[CTI_G77_ULONGINT_TYPE]
205
63ad61ed
ZW
206#define function_id_node c_global_trees[CTI_FUNCTION_ID]
207#define pretty_function_id_node c_global_trees[CTI_PRETTY_FUNCTION_ID]
208#define func_id_node c_global_trees[CTI_FUNC_ID]
209
ae499cce
MM
210/* A node for `((void) 0)'. */
211#define void_zero_node c_global_trees[CTI_VOID_ZERO]
212
ab76ca54
MM
213extern tree c_global_trees[CTI_MAX];
214
8f17b5c5
MM
215/* Mark which labels are explicitly declared.
216 These may be shadowed, and may be referenced from nested functions. */
217#define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
218
ab76ca54
MM
219typedef enum c_language_kind
220{
221 clk_c, /* A dialect of C: K&R C, ANSI/ISO C89, C2000,
222 etc. */
223 clk_cplusplus, /* ANSI/ISO C++ */
224 clk_objective_c /* Objective C */
225}
226c_language_kind;
227
ae499cce
MM
228/* Information about a statement tree. */
229
230struct stmt_tree_s {
231 /* The last statement added to the tree. */
232 tree x_last_stmt;
233 /* The type of the last expression statement. (This information is
234 needed to implement the statement-expression extension.) */
235 tree x_last_expr_type;
236 /* In C++, Non-zero if we should treat statements as full
237 expressions. In particular, this variable is no-zero if at the
238 end of a statement we should destroy any temporaries created
239 during that statement. Similarly, if, at the end of a block, we
240 should destroy any local variables in this block. Normally, this
241 variable is non-zero, since those are the normal semantics of
242 C++.
243
244 However, in order to represent aggregate initialization code as
245 tree structure, we use statement-expressions. The statements
246 within the statement expression should not result in cleanups
247 being run until the entire enclosing statement is complete.
248
249 This flag has no effect in C. */
250 int stmts_are_full_exprs_p;
251};
252
253typedef struct stmt_tree_s *stmt_tree;
254
255/* Global state pertinent to the current function. Some C dialects
256 extend this structure with additional fields. */
257
258struct language_function {
259 /* While we are parsing the function, this contains information
260 about the statement-tree that we are building. */
261 struct stmt_tree_s x_stmt_tree;
8f17b5c5
MM
262 /* The stack of SCOPE_STMTs for the current function. */
263 tree x_scope_stmt_stack;
264 /* Nonzero if __FUNCTION__ and its ilk have been declared in this
265 function. */
266 int x_function_name_declared_p;
ae499cce
MM
267};
268
269/* When building a statement-tree, this is the last statement added to
270 the tree. */
271
272#define last_tree (current_stmt_tree ()->x_last_stmt)
273
274/* The type of the last expression-statement we have seen. */
275
276#define last_expr_type (current_stmt_tree ()->x_last_expr_type)
277
8f17b5c5
MM
278/* LAST_TREE contains the last statement parsed. These are chained
279 together through the TREE_CHAIN field, but often need to be
280 re-organized since the parse is performed bottom-up. This macro
281 makes LAST_TREE the indicated SUBSTMT of STMT. */
282
283#define RECHAIN_STMTS(stmt, substmt) \
284 do { \
285 substmt = TREE_CHAIN (stmt); \
286 TREE_CHAIN (stmt) = NULL_TREE; \
287 last_tree = stmt; \
288 } while (0)
289
290/* Language-specific hooks. */
291
292extern int (*lang_statement_code_p) PARAMS ((enum tree_code));
293extern void (*lang_expand_stmt) PARAMS ((tree));
294extern void (*lang_expand_decl_stmt) PARAMS ((tree));
295extern void (*lang_expand_function_end) PARAMS ((void));
296
ae499cce
MM
297/* The type of a function that walks over tree structure. */
298
299typedef tree (*walk_tree_fn) PARAMS ((tree *,
300 int *,
301 void *));
302
303extern stmt_tree current_stmt_tree PARAMS ((void));
8f17b5c5 304extern tree *current_scope_stmt_stack PARAMS ((void));
ae499cce 305extern void begin_stmt_tree PARAMS ((tree *));
56cb9733 306extern tree add_stmt PARAMS ((tree));
8f17b5c5
MM
307extern void add_decl_stmt PARAMS ((tree));
308extern tree add_scope_stmt PARAMS ((int, int));
ae499cce
MM
309extern void finish_stmt_tree PARAMS ((tree *));
310
311extern int statement_code_p PARAMS ((enum tree_code));
ae499cce
MM
312extern tree walk_stmt_tree PARAMS ((tree *,
313 walk_tree_fn,
314 void *));
54f7877c 315extern void prep_stmt PARAMS ((tree));
54f7877c 316extern void expand_stmt PARAMS ((tree));
8f17b5c5 317extern void mark_stmt_tree PARAMS ((void *));
ae499cce 318
8f17b5c5
MM
319/* Extra information associated with a DECL. Other C dialects extend
320 this structure in various ways. The C front-end only uses this
321 structure for FUNCTION_DECLs; all other DECLs have a NULL
322 DECL_LANG_SPECIFIC field. */
56cb9733 323
8f17b5c5
MM
324struct c_lang_decl {
325 /* In a FUNCTION_DECL, this is DECL_SAVED_TREE. */
326 tree saved_tree;
327};
328
329/* In a FUNCTION_DECL, the saved representation of the body of the
330 entire function. Usually a COMPOUND_STMT, but in C++ this may also
331 be a RETURN_INIT, CTOR_INITIALIZER, or TRY_BLOCK. */
332#define DECL_SAVED_TREE(NODE) \
333 (((struct c_lang_decl *) DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (NODE))) \
334 ->saved_tree)
335
336extern void c_mark_lang_decl PARAMS ((struct c_lang_decl *));
56cb9733 337
ab76ca54
MM
338/* The variant of the C language being processed. Each C language
339 front-end defines this variable. */
340
341extern c_language_kind c_language;
342
343/* Nonzero means give string constants the type `const char *', rather
344 than `char *'. */
345
346extern int flag_const_strings;
347
348/* Warn about *printf or *scanf format/argument anomalies. */
349
350extern int warn_format;
351
2683ed8d
BS
352/* Warn about possible violations of sequence point rules. */
353
354extern int warn_sequence_point;
355
74ff4629
JM
356/* Warn about functions which might be candidates for format attributes. */
357
358extern int warn_missing_format_attribute;
359
ab76ca54
MM
360/* Nonzero means do some things the same way PCC does. */
361
362extern int flag_traditional;
363
eaf299c6 364/* Nonzero means enable C89 Amendment 1 features. */
b8458e3e
JM
365
366extern int flag_isoc94;
367
ab76ca54
MM
368/* Nonzero means use the ISO C99 dialect of C. */
369
370extern int flag_isoc99;
371
93e2382f
JM
372/* Nonzero means environment is hosted (i.e., not freestanding) */
373
374extern int flag_hosted;
375
376/* Nonzero means add default format_arg attributes for functions not
377 in ISO C. */
378
379extern int flag_noniso_default_format_attributes;
380
6bcedb4e
MM
381/* Nonzero means don't recognize any builtin functions. */
382
383extern int flag_no_builtin;
384
385/* Nonzero means don't recognize the non-ANSI builtin functions.
386 -ansi sets this. */
387
388extern int flag_no_nonansi_builtin;
389
0a7394bc
MM
390/* If non-NULL, dump the tree structure for the entire translation
391 unit to this file. */
392
393extern const char *flag_dump_translation_unit;
394
ab76ca54
MM
395/* Nonzero means warn about suggesting putting in ()'s. */
396
397extern int warn_parentheses;
398
399/* Warn if a type conversion is done that might have confusing results. */
400
401extern int warn_conversion;
402
403/* C types are partitioned into three subsets: object, function, and
404 incomplete types. */
405#define C_TYPE_OBJECT_P(type) \
406 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
407
408#define C_TYPE_INCOMPLETE_P(type) \
409 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
410
411#define C_TYPE_FUNCTION_P(type) \
412 (TREE_CODE (type) == FUNCTION_TYPE)
413
0a7394bc
MM
414/* Return the qualifiers that apply to this type. In C++, that means
415 descending through array types. Note that this macro evaluates its
416 arguments mor than once. */
417#define C_TYPE_QUALS(TYPE) \
418 (TYPE_QUALS ((TREE_CODE (TYPE) == ARRAY_TYPE \
419 && c_language == clk_cplusplus) \
420 ? strip_array_types (TYPE) : TYPE))
421
ab76ca54
MM
422/* For convenience we define a single macro to identify the class of
423 object or incomplete types. */
424#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
425 (!C_TYPE_FUNCTION_P (type))
426
427/* Record in each node resulting from a binary operator
428 what operator was specified for it. */
429#define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
430
2ce07e2d
NS
431/* Pointer to function to generate the VAR_DECL for __FUNCTION__ etc.
432 ID is the identifier to use, NAME is the string.
433 TYPE_DEP indicates whether it depends on type of the function or not
434 (i.e. __PRETTY_FUNCTION__). */
435
436extern tree (*make_fname_decl) PARAMS ((tree, const char *, int));
437
6e090c76
KG
438extern void declare_function_name PARAMS ((void));
439extern void decl_attributes PARAMS ((tree, tree, tree));
440extern void init_function_format_info PARAMS ((void));
3f80e6ac 441extern void check_function_format PARAMS ((int *, tree, tree, tree));
6e090c76 442extern void c_apply_type_quals_to_decl PARAMS ((int, tree));
7f4edbcb
BS
443/* Print an error message for invalid operands to arith operation CODE.
444 NOP_EXPR is used as a special case (see truthvalue_conversion). */
6e090c76
KG
445extern void binary_op_error PARAMS ((enum tree_code));
446extern void c_expand_expr_stmt PARAMS ((tree));
8f17b5c5
MM
447extern void c_expand_start_cond PARAMS ((tree, int));
448extern void c_finish_then PARAMS ((void));
6e090c76 449extern void c_expand_start_else PARAMS ((void));
8f17b5c5 450extern void c_finish_else PARAMS ((void));
6e090c76 451extern void c_expand_end_cond PARAMS ((void));
7f4edbcb 452/* Validate the expression after `case' and apply default promotions. */
6e090c76 453extern tree check_case_value PARAMS ((tree));
7f4edbcb 454/* Concatenate a list of STRING_CST nodes into one STRING_CST. */
6e090c76
KG
455extern tree combine_strings PARAMS ((tree));
456extern void constant_expression_warning PARAMS ((tree));
457extern tree convert_and_check PARAMS ((tree, tree));
458extern void overflow_warning PARAMS ((tree));
459extern void unsigned_conversion_warning PARAMS ((tree, tree));
ab76ca54 460
7f4edbcb 461/* Read the rest of the current #-directive line. */
6e090c76 462extern char *get_directive_line PARAMS ((void));
7f4edbcb 463#define GET_DIRECTIVE_LINE() get_directive_line ()
7f4edbcb
BS
464
465/* Subroutine of build_binary_op, used for comparison operations.
466 See if the operands have both been converted from subword integer types
467 and, if so, perhaps change them both back to their original type. */
6e090c76 468extern tree shorten_compare PARAMS ((tree *, tree *, tree *, enum tree_code *));
7f4edbcb
BS
469/* Prepare expr to be an argument of a TRUTH_NOT_EXPR,
470 or validate its data type for an `if' or `while' statement or ?..: exp. */
6e090c76
KG
471extern tree truthvalue_conversion PARAMS ((tree));
472extern tree type_for_mode PARAMS ((enum machine_mode, int));
473extern tree type_for_size PARAMS ((unsigned, int));
7f4edbcb 474
50e60bc3
ZW
475extern unsigned int min_precision PARAMS ((tree, int));
476
477/* Add qualifiers to a type, in the fashion for C. */
478extern tree c_build_qualified_type PARAMS ((tree, int));
479
7f4edbcb
BS
480/* Build tree nodes and builtin functions common to both C and C++ language
481 frontends. */
6bcedb4e 482extern void c_common_nodes_and_builtins PARAMS ((void));
d3707adb 483
6e090c76 484extern tree build_va_arg PARAMS ((tree, tree));
7e8176d7 485
c530479e
RH
486/* Nonzero if the type T promotes to itself.
487 ANSI C states explicitly the list of types that promote;
488 in particular, short promotes to int even if they have the same width. */
489#define C_PROMOTING_INTEGER_TYPE_P(t) \
490 (TREE_CODE ((t)) == INTEGER_TYPE \
491 && (TYPE_MAIN_VARIANT (t) == char_type_node \
492 || TYPE_MAIN_VARIANT (t) == signed_char_type_node \
493 || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node \
494 || TYPE_MAIN_VARIANT (t) == short_integer_type_node \
495 || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node))
496
6e090c76
KG
497extern int self_promoting_args_p PARAMS ((tree));
498extern tree simple_type_promotes_to PARAMS ((tree));
0a7394bc 499extern tree strip_array_types PARAMS ((tree));
d7e7759d 500
ae499cce
MM
501/* These macros provide convenient access to the various _STMT nodes. */
502
503/* Nonzero if this statement should be considered a full-expression,
504 i.e., if temporaries created during this statement should have
505 their destructors run at the end of this statement. (In C, this
506 will always be false, since there are no destructors.) */
507#define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
35b1567d
BC
508
509/* IF_STMT accessors. These give access to the condtion of the if
510 statement, the then block of the if statement, and the else block
511 of the if stsatement if it exists. */
d7e7759d
BC
512#define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
513#define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
514#define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
35b1567d
BC
515
516/* WHILE_STMT accessors. These give access to the condtion of the
517 while statement and the body of the while statement, respectively. */
d7e7759d
BC
518#define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
519#define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
35b1567d
BC
520
521/* DO_STMT accessors. These give access to the condition of the do
522 statement and the body of the do statement, respectively. */
d7e7759d
BC
523#define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
524#define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
35b1567d
BC
525
526/* RETURN_STMT accessor. This gives the expression associated with a
527 return statement. */
d7e7759d 528#define RETURN_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
35b1567d
BC
529
530/* EXPR_STMT accessor. This gives the expression associated with an
531 expression statement. */
d7e7759d 532#define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
35b1567d
BC
533
534/* FOR_STMT accessors. These give access to the init statement,
535 condition, update expression, and body of the for statement,
536 respectively. */
d7e7759d
BC
537#define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
538#define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
539#define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
540#define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
35b1567d
BC
541
542/* SWITCH_STMT accessors. These give access to the condition and body
543 of the switch statement, respectively. */
d7e7759d
BC
544#define SWITCH_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
545#define SWITCH_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
35b1567d
BC
546
547/* CASE_LABEL accessors. These give access to the high and low values
548 of a case label, respectively. */
d7e7759d
BC
549#define CASE_LOW(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
550#define CASE_HIGH(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
56cb9733 551#define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
35b1567d
BC
552
553/* GOTO_STMT accessor. This gives access to the label associated with
554 a goto statement. */
d7e7759d 555#define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
35b1567d
BC
556
557/* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
558 statements assocated with a compound statement. The result is the
559 first statement in the list. Succeeding nodes can be acccessed by
560 calling TREE_CHAIN on a node in the list. */
d7e7759d 561#define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
35b1567d
BC
562
563/* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
564 instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
565 ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
566 statement. */
d7e7759d
BC
567#define ASM_CV_QUAL(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
568#define ASM_STRING(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
569#define ASM_OUTPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
570#define ASM_INPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
571#define ASM_CLOBBERS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
35b1567d
BC
572
573/* DECL_STMT accessor. This gives access to the DECL associated with
574 the given declaration statement. */
d7e7759d 575#define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
35b1567d
BC
576
577/* STMT_EXPR accessor. */
d7e7759d 578#define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
35b1567d
BC
579
580/* LABEL_STMT accessor. This gives access to the label associated with
581 the given label statement. */
d7e7759d
BC
582#define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
583
584/* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
585#define SCOPE_BEGIN_P(NODE) \
586 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
587
588/* Nonzero if this SCOPE_STMT is for the end of a scope. */
589#define SCOPE_END_P(NODE) \
590 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
591
592/* The BLOCK containing the declarations contained in this scope. */
593#define SCOPE_STMT_BLOCK(NODE) \
594 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
595
596/* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
597#define SCOPE_NULLIFIED_P(NODE) \
598 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
599
600/* Nonzero for a SCOPE_STMT which represents a lexical scope, but
601 which should be treated as non-existant from the point of view of
602 running cleanup actions. */
603#define SCOPE_NO_CLEANUPS_P(NODE) \
604 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
605
606/* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
607 For example, in:
608
609 S s;
610 l:
611 S s2;
612 goto l;
613
614 there is (implicitly) a new scope after `l', even though there are
615 no curly braces. In particular, when we hit the goto, we must
616 destroy s2 and then re-construct it. For the implicit scope,
617 SCOPE_PARTIAL_P will be set. */
618#define SCOPE_PARTIAL_P(NODE) \
619 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
620
621/* Nonzero for an ASM_STMT if the assembly statement is volatile. */
622#define ASM_VOLATILE_P(NODE) \
623 (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
624
625/* The line-number at which a statement began. But if
626 STMT_LINENO_FOR_FN_P does holds, then this macro gives the
627 line number for the end of the current function instead. */
628#define STMT_LINENO(NODE) \
629 (TREE_COMPLEXITY ((NODE)))
630
631/* If non-zero, the STMT_LINENO for NODE is the line at which the
632 function ended. */
633#define STMT_LINENO_FOR_FN_P(NODE) \
634 (TREE_LANG_FLAG_2 ((NODE)))
c7d87c0a 635
f2c5f623
BC
636/* Nonzero if we want the new ISO rules for pushing a new scope for `for'
637 initialization variables. */
638#define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
c7d87c0a
BC
639
640#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
641
642enum c_tree_code {
643 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
644#include "c-common.def"
645 LAST_C_TREE_CODE
646};
647
648#undef DEFTREECODE
649
650extern void add_c_tree_codes PARAMS ((void));
f2c5f623 651extern void genrtl_do_pushlevel PARAMS ((void));
f2c5f623
BC
652extern void genrtl_goto_stmt PARAMS ((tree));
653extern void genrtl_expr_stmt PARAMS ((tree));
654extern void genrtl_decl_stmt PARAMS ((tree));
655extern void genrtl_if_stmt PARAMS ((tree));
656extern void genrtl_while_stmt PARAMS ((tree));
657extern void genrtl_do_stmt PARAMS ((tree));
658extern void genrtl_return_stmt PARAMS ((tree));
659extern void genrtl_for_stmt PARAMS ((tree));
660extern void genrtl_break_stmt PARAMS ((void));
661extern void genrtl_continue_stmt PARAMS ((void));
662extern void genrtl_scope_stmt PARAMS ((tree));
663extern void genrtl_switch_stmt PARAMS ((tree));
56cb9733 664extern void genrtl_case_label PARAMS ((tree));
4cf88f57 665extern void genrtl_compound_stmt PARAMS ((tree));
f2c5f623
BC
666extern void genrtl_asm_stmt PARAMS ((tree, tree,
667 tree, tree,
668 tree));
669extern void genrtl_decl_cleanup PARAMS ((tree, tree));
670extern int stmts_are_full_exprs_p PARAMS ((void));
f2c5f623
BC
671extern int anon_aggr_type_p PARAMS ((tree));
672
673/* For a VAR_DECL that is an anonymous union, these are the various
674 sub-variables that make up the anonymous union. */
675#define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
676
0a7394bc
MM
677/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
678#define DECL_C_BIT_FIELD(NODE) \
679 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
680#define SET_DECL_C_BIT_FIELD(NODE) \
681 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
682#define CLEAR_DECL_C_BIT_FIELD(NODE) \
683 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
684
3645c4dc
RH
685/* In a VAR_DECL, nonzero if the decl is a register variable with
686 an explicit asm specification. */
687#define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
688
f2c5f623
BC
689extern void emit_local_var PARAMS ((tree));
690extern void make_rtl_for_local_static PARAMS ((tree));
691extern tree expand_cond PARAMS ((tree));
f2c5f623 692extern void c_expand_return PARAMS ((tree));
f2c5f623 693extern void do_case PARAMS ((tree, tree));
0dfdeca6 694extern tree build_stmt PARAMS ((enum tree_code, ...));
56cb9733 695extern tree build_case_label PARAMS ((tree, tree, tree));
0dfdeca6
BC
696extern tree build_continue_stmt PARAMS ((void));
697extern tree build_break_stmt PARAMS ((void));
698extern tree build_return_stmt PARAMS ((tree));
f2c5f623
BC
699
700#define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
701
702extern void c_expand_asm_operands PARAMS ((tree, tree, tree, tree, int, const char *, int));
ab76ca54
MM
703
704/* These functions must be defined by each front-end which implements
705 a variant of the C language. They are used in c-common.c. */
706
707extern tree build_unary_op PARAMS ((enum tree_code,
708 tree, int));
709extern tree build_binary_op PARAMS ((enum tree_code,
710 tree, tree, int));
711extern int lvalue_p PARAMS ((tree));
712extern tree default_conversion PARAMS ((tree));
713
714/* Given two integer or real types, return the type for their sum.
715 Given two compatible ANSI C types, returns the merged type. */
716
717extern tree common_type PARAMS ((tree, tree));
44835fdd
MM
718
719extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
0e5921e8 720
56cb9733
MM
721extern tree decl_constant_value PARAMS ((tree));
722
19552aa5
JM
723/* Handle increment and decrement of boolean types. */
724extern tree boolean_increment PARAMS ((enum tree_code,
725 tree));
726
0e5921e8
ZW
727/* Hook currently used only by the C++ front end to reset internal state
728 after entering or leaving a header file. */
729extern void extract_interface_info PARAMS ((void));
730
8f17b5c5
MM
731extern void mark_c_language_function PARAMS ((struct language_function *));
732
733extern int case_compare PARAMS ((splay_tree_key,
734 splay_tree_key));
735
736extern tree c_add_case_label PARAMS ((splay_tree,
737 tree, tree,
738 tree));
739
c70eaeaf
KG
740extern tree build_function_call PARAMS ((tree, tree));
741
67673f5c
MM
742/* If this variable is defined to a non-NULL value, it will be called
743 after the file has been completely parsed. The argument will be
744 the GLOBAL_NAMESPACE in C++, or the list of top-level declarations
745 in C. */
746extern void (*back_end_hook) PARAMS ((tree));
747
8f17b5c5
MM
748#ifdef RTX_CODE
749
750extern struct rtx_def *c_expand_expr PARAMS ((tree, rtx,
751 enum machine_mode,
752 enum expand_modifier));
753
754extern int c_safe_from_p PARAMS ((rtx, tree));
8f17b5c5
MM
755#endif
756
3fe30ff6
RH
757extern int c_unsafe_for_reeval PARAMS ((tree));
758
0a7394bc
MM
759/* In dump.c */
760
761typedef struct dump_info *dump_info_p;
762
763/* A callback function used dump language-specific parts of tree
764 nodes. Returns non-zero if it does not want the usual dumping of
765 the second argument. */
766
767typedef int (*dump_tree_fn) PARAMS ((dump_info_p, tree));
768
769extern dump_tree_fn lang_dump_tree;
770
771extern void dump_node_to_file PARAMS ((tree, const char *));
772
0e5921e8
ZW
773/* Information recorded about each file examined during compilation. */
774
775struct c_fileinfo
776{
777 int time; /* Time spent in the file. */
778 short interface_only; /* Flags - used only by C++ */
779 short interface_unknown;
780};
781
782struct c_fileinfo *get_fileinfo PARAMS ((const char *));
783extern void dump_time_statistics PARAMS ((void));
784
785#endif
67673f5c
MM
786
787