1/* Language-dependent node constructors for parse phase of GNU compiler.
|
2 Copyright (C) 1987, 88, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
|
| 2 Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc. |
3 Hacked by Michael Tiemann (tiemann@cygnus.com)
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
22#include "config.h"
23#include "system.h"
24#include "obstack.h"
25#include "tree.h"
26#include "cp-tree.h"
27#include "flags.h"
28#include "rtl.h"
29#include "toplev.h"
30
|
31#ifdef __STDC__
32#include <stdarg.h>
33#else
34#include <varargs.h>
35#endif
36
37extern void compiler_error ();
38
39static tree get_identifier_list PROTO((tree));
|
31static tree bot_manip PROTO((tree));
32static tree perm_manip PROTO((tree));
33static tree build_cplus_array_type_1 PROTO((tree, tree));
34static void list_hash_add PROTO((int, tree));
35static int list_hash PROTO((tree, tree, tree));
|
45static tree list_hash_lookup PROTO((int, int, int, int, tree, tree,
46 tree));
|
| 36static tree list_hash_lookup PROTO((int, tree, tree, tree)); |
37static void propagate_binfo_offsets PROTO((tree, tree));
|
48static void unshare_base_binfos PROTO((tree));
|
38static int avoid_overlap PROTO((tree, tree));
|
| 39static int lvalue_p_1 PROTO((tree, int)); |
40static int equal_functions PROTO((tree, tree));
|
41static tree no_linkage_helper PROTO((tree));
42static tree build_srcloc PROTO((char *, int)); |
43
44#define CEIL(x,y) (((x) + (y) - 1) / (y))
45
|
54/* Return nonzero if REF is an lvalue valid for this language.
55 Lvalues can be assigned, unless they have TREE_READONLY.
56 Lvalues can have their address taken, unless they have DECL_REGISTER. */
|
46/* Returns non-zero if REF is an lvalue. If
47 TREAT_CLASS_RVALUES_AS_LVALUES is non-zero, rvalues of class type
48 are considered lvalues. */ |
49
|
58int
59real_lvalue_p (ref)
|
50static int
51lvalue_p_1 (ref, treat_class_rvalues_as_lvalues) |
52 tree ref;
|
| 53 int treat_class_rvalues_as_lvalues; |
54{
|
62 if (! language_lvalue_valid (ref))
63 return 0;
64
|
55 if (TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE)
56 return 1;
57
58 if (ref == current_class_ptr && flag_this_is_variable <= 0)
59 return 0;
60
61 switch (TREE_CODE (ref))
62 {
63 /* preincrements and predecrements are valid lvals, provided
64 what they refer to are valid lvals. */
65 case PREINCREMENT_EXPR:
66 case PREDECREMENT_EXPR:
67 case COMPONENT_REF:
68 case SAVE_EXPR:
69 case UNSAVE_EXPR:
70 case TRY_CATCH_EXPR:
71 case WITH_CLEANUP_EXPR:
|
82 return real_lvalue_p (TREE_OPERAND (ref, 0));
|
72 case REALPART_EXPR:
73 case IMAGPART_EXPR:
74 case NOP_EXPR:
75 return lvalue_p_1 (TREE_OPERAND (ref, 0),
76 treat_class_rvalues_as_lvalues); |
77
78 case STRING_CST:
79 return 1;
80
81 case VAR_DECL:
82 if (TREE_READONLY (ref) && ! TREE_STATIC (ref)
83 && DECL_LANG_SPECIFIC (ref)
84 && DECL_IN_AGGR_P (ref))
85 return 0;
86 case INDIRECT_REF:
87 case ARRAY_REF:
88 case PARM_DECL:
89 case RESULT_DECL:
|
96 case ERROR_MARK:
97 if (TREE_CODE (TREE_TYPE (ref)) != FUNCTION_TYPE
98 && TREE_CODE (TREE_TYPE (ref)) != METHOD_TYPE)
|
| 90 if (TREE_CODE (TREE_TYPE (ref)) != METHOD_TYPE) |
91 return 1;
92 break;
93
94 /* A currently unresolved scope ref. */
95 case SCOPE_REF:
96 my_friendly_abort (103);
97 case OFFSET_REF:
98 if (TREE_CODE (TREE_OPERAND (ref, 1)) == FUNCTION_DECL)
99 return 1;
|
108 return real_lvalue_p (TREE_OPERAND (ref, 0))
109 && real_lvalue_p (TREE_OPERAND (ref, 1));
|
100 return (lvalue_p_1 (TREE_OPERAND (ref, 0),
101 treat_class_rvalues_as_lvalues)
102 && lvalue_p_1 (TREE_OPERAND (ref, 1),
103 treat_class_rvalues_as_lvalues)); |
104 break;
105
106 case COND_EXPR:
|
113 return (real_lvalue_p (TREE_OPERAND (ref, 1))
114 && real_lvalue_p (TREE_OPERAND (ref, 2)));
|
107 return (lvalue_p_1 (TREE_OPERAND (ref, 1),
108 treat_class_rvalues_as_lvalues)
109 && lvalue_p_1 (TREE_OPERAND (ref, 2),
110 treat_class_rvalues_as_lvalues)); |
111
112 case MODIFY_EXPR:
113 return 1;
114
115 case COMPOUND_EXPR:
|
120 return real_lvalue_p (TREE_OPERAND (ref, 1));
|
116 return lvalue_p_1 (TREE_OPERAND (ref, 1),
117 treat_class_rvalues_as_lvalues); |
118
119 case MAX_EXPR:
120 case MIN_EXPR:
|
124 return (real_lvalue_p (TREE_OPERAND (ref, 0))
125 && real_lvalue_p (TREE_OPERAND (ref, 1)));
|
121 return (lvalue_p_1 (TREE_OPERAND (ref, 0),
122 treat_class_rvalues_as_lvalues)
123 && lvalue_p_1 (TREE_OPERAND (ref, 1),
124 treat_class_rvalues_as_lvalues)); |
125
|
126 case TARGET_EXPR:
127 return treat_class_rvalues_as_lvalues;
128
129 case CALL_EXPR:
130 return (treat_class_rvalues_as_lvalues
131 && IS_AGGR_TYPE (TREE_TYPE (ref)));
132
133 case FUNCTION_DECL:
134 /* All functions (except non-static-member functions) are
135 lvalues. */
136 return !DECL_NONSTATIC_MEMBER_FUNCTION_P (ref);
137 |
138 default:
139 break;
140 }
141
142 return 0;
143}
144
|
145/* Return nonzero if REF is an lvalue valid for this language.
146 Lvalues can be assigned, unless they have TREE_READONLY, or unless
147 they are FUNCTION_DECLs. Lvalues can have their address taken,
148 unless they have DECL_REGISTER. */
149
150int
151real_lvalue_p (ref)
152 tree ref;
153{
154 return lvalue_p_1 (ref, /*treat_class_rvalues_as_lvalues=*/0);
155}
156 |
157/* This differs from real_lvalue_p in that class rvalues are considered
158 lvalues. */
|
| 159 |
160int
161lvalue_p (ref)
162 tree ref;
163{
|
140 if (! language_lvalue_valid (ref))
141 return 0;
142
143 if (TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE)
144 return 1;
145
146 if (ref == current_class_ptr && flag_this_is_variable <= 0)
147 return 0;
148
149 switch (TREE_CODE (ref))
150 {
151 /* preincrements and predecrements are valid lvals, provided
152 what they refer to are valid lvals. */
153 case PREINCREMENT_EXPR:
154 case PREDECREMENT_EXPR:
155 case REALPART_EXPR:
156 case IMAGPART_EXPR:
157 case COMPONENT_REF:
158 case SAVE_EXPR:
159 case UNSAVE_EXPR:
160 case TRY_CATCH_EXPR:
161 case WITH_CLEANUP_EXPR:
162 return lvalue_p (TREE_OPERAND (ref, 0));
163
164 case STRING_CST:
165 return 1;
166
167 case VAR_DECL:
168 if (TREE_READONLY (ref) && ! TREE_STATIC (ref)
169 && DECL_LANG_SPECIFIC (ref)
170 && DECL_IN_AGGR_P (ref))
171 return 0;
172 case INDIRECT_REF:
173 case ARRAY_REF:
174 case PARM_DECL:
175 case RESULT_DECL:
176 case ERROR_MARK:
177 if (TREE_CODE (TREE_TYPE (ref)) != FUNCTION_TYPE
178 && TREE_CODE (TREE_TYPE (ref)) != METHOD_TYPE)
179 return 1;
180 break;
181
182 case TARGET_EXPR:
183 return 1;
184
185 case CALL_EXPR:
186 if (IS_AGGR_TYPE (TREE_TYPE (ref)))
187 return 1;
188 break;
189
190 /* A currently unresolved scope ref. */
191 case SCOPE_REF:
192 my_friendly_abort (103);
193 case OFFSET_REF:
194 if (TREE_CODE (TREE_OPERAND (ref, 1)) == FUNCTION_DECL)
195 return 1;
196 return lvalue_p (TREE_OPERAND (ref, 0))
197 && lvalue_p (TREE_OPERAND (ref, 1));
198 break;
199
200 case COND_EXPR:
201 return (lvalue_p (TREE_OPERAND (ref, 1))
202 && lvalue_p (TREE_OPERAND (ref, 2)));
203
204 case MODIFY_EXPR:
205 return 1;
206
207 case COMPOUND_EXPR:
208 return lvalue_p (TREE_OPERAND (ref, 1));
209
210 case MAX_EXPR:
211 case MIN_EXPR:
212 return (lvalue_p (TREE_OPERAND (ref, 0))
213 && lvalue_p (TREE_OPERAND (ref, 1)));
214
215 default:
216 break;
217 }
218
219 return 0;
|
| 164 return lvalue_p_1 (ref, /*treat_class_rvalues_as_lvalues=*/1); |
165}
166
167/* Return nonzero if REF is an lvalue valid for this language;
168 otherwise, print an error message and return zero. */
169
170int
171lvalue_or_else (ref, string)
172 tree ref;
|
228 char *string;
|
| 173 const char *string; |
174{
175 int win = lvalue_p (ref);
176 if (! win)
177 error ("non-lvalue in %s", string);
178 return win;
179}
180
181/* INIT is a CALL_EXPR which needs info about its target.
182 TYPE is the type that this initialization should appear to have.
183
184 Build an encapsulation of the initialization to perform
185 and return it so that it can be processed by language-independent
186 and language-specific expression expanders. */
187
188tree
189build_cplus_new (type, init)
190 tree type;
191 tree init;
192{
193 tree slot;
194 tree rval;
195
196 if (TREE_CODE (init) != CALL_EXPR && TREE_CODE (init) != AGGR_INIT_EXPR)
|
252 return init;
|
| 197 return convert (type, init); |
198
199 slot = build (VAR_DECL, type);
200 DECL_ARTIFICIAL (slot) = 1;
201 layout_decl (slot, 0);
202 rval = build (AGGR_INIT_EXPR, type,
203 TREE_OPERAND (init, 0), TREE_OPERAND (init, 1), slot);
204 TREE_SIDE_EFFECTS (rval) = 1;
205 rval = build (TARGET_EXPR, type, slot, rval, NULL_TREE, NULL_TREE);
206 TREE_SIDE_EFFECTS (rval) = 1;
207
208 return rval;
209}
210
211/* Encapsulate the expression INIT in a TARGET_EXPR. */
212
213tree
214get_target_expr (init)
215 tree init;
216{
217 tree slot;
218 tree rval;
219
220 slot = build (VAR_DECL, TREE_TYPE (init));
221 DECL_ARTIFICIAL (slot) = 1;
222 layout_decl (slot, 0);
223 rval = build (TARGET_EXPR, TREE_TYPE (init), slot, init,
224 NULL_TREE, NULL_TREE);
225 TREE_SIDE_EFFECTS (rval) = 1;
226
227 return rval;
228}
229
230/* Recursively search EXP for CALL_EXPRs that need cleanups and replace
231 these CALL_EXPRs with tree nodes that will perform the cleanups. */
232
233tree
234break_out_cleanups (exp)
235 tree exp;
236{
237 tree tmp = exp;
238
239 if (TREE_CODE (tmp) == CALL_EXPR
240 && TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (tmp)))
241 return build_cplus_new (TREE_TYPE (tmp), tmp);
242
243 while (TREE_CODE (tmp) == NOP_EXPR
244 || TREE_CODE (tmp) == CONVERT_EXPR
245 || TREE_CODE (tmp) == NON_LVALUE_EXPR)
246 {
247 if (TREE_CODE (TREE_OPERAND (tmp, 0)) == CALL_EXPR
248 && TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (TREE_OPERAND (tmp, 0))))
249 {
250 TREE_OPERAND (tmp, 0)
251 = build_cplus_new (TREE_TYPE (TREE_OPERAND (tmp, 0)),
252 TREE_OPERAND (tmp, 0));
253 break;
254 }
255 else
256 tmp = TREE_OPERAND (tmp, 0);
257 }
258 return exp;
259}
260
261/* Recursively perform a preorder search EXP for CALL_EXPRs, making
262 copies where they are found. Returns a deep copy all nodes transitively
263 containing CALL_EXPRs. */
264
265tree
266break_out_calls (exp)
267 tree exp;
268{
269 register tree t1, t2 = NULL_TREE;
270 register enum tree_code code;
271 register int changed = 0;
272 register int i;
273
274 if (exp == NULL_TREE)
275 return exp;
276
277 code = TREE_CODE (exp);
278
279 if (code == CALL_EXPR)
280 return copy_node (exp);
281
282 /* Don't try and defeat a save_expr, as it should only be done once. */
283 if (code == SAVE_EXPR)
284 return exp;
285
286 switch (TREE_CODE_CLASS (code))
287 {
288 default:
289 abort ();
290
291 case 'c': /* a constant */
292 case 't': /* a type node */
293 case 'x': /* something random, like an identifier or an ERROR_MARK. */
294 return exp;
295
296 case 'd': /* A decl node */
297#if 0 /* This is bogus. jason 9/21/94 */
298
299 t1 = break_out_calls (DECL_INITIAL (exp));
300 if (t1 != DECL_INITIAL (exp))
301 {
302 exp = copy_node (exp);
303 DECL_INITIAL (exp) = t1;
304 }
305#endif
306 return exp;
307
308 case 'b': /* A block node */
309 {
310 /* Don't know how to handle these correctly yet. Must do a
311 break_out_calls on all DECL_INITIAL values for local variables,
312 and also break_out_calls on all sub-blocks and sub-statements. */
313 abort ();
314 }
315 return exp;
316
317 case 'e': /* an expression */
318 case 'r': /* a reference */
319 case 's': /* an expression with side effects */
320 for (i = tree_code_length[(int) code] - 1; i >= 0; i--)
321 {
322 t1 = break_out_calls (TREE_OPERAND (exp, i));
323 if (t1 != TREE_OPERAND (exp, i))
324 {
325 exp = copy_node (exp);
326 TREE_OPERAND (exp, i) = t1;
327 }
328 }
329 return exp;
330
331 case '<': /* a comparison expression */
332 case '2': /* a binary arithmetic expression */
333 t2 = break_out_calls (TREE_OPERAND (exp, 1));
334 if (t2 != TREE_OPERAND (exp, 1))
335 changed = 1;
336 case '1': /* a unary arithmetic expression */
337 t1 = break_out_calls (TREE_OPERAND (exp, 0));
338 if (t1 != TREE_OPERAND (exp, 0))
339 changed = 1;
340 if (changed)
341 {
342 if (tree_code_length[(int) code] == 1)
343 return build1 (code, TREE_TYPE (exp), t1);
344 else
345 return build (code, TREE_TYPE (exp), t1, t2);
346 }
347 return exp;
348 }
349
350}
351
352extern struct obstack *current_obstack;
353extern struct obstack permanent_obstack, class_obstack;
354extern struct obstack *saveable_obstack;
355extern struct obstack *expression_obstack;
356
357/* Here is how primitive or already-canonicalized types' hash
358 codes are made. MUST BE CONSISTENT WITH tree.c !!! */
359#define TYPE_HASH(TYPE) ((HOST_WIDE_INT) (TYPE) & 0777777)
360
361/* Construct, lay out and return the type of methods belonging to class
362 BASETYPE and whose arguments are described by ARGTYPES and whose values
363 are described by RETTYPE. If each type exists already, reuse it. */
364
365tree
366build_cplus_method_type (basetype, rettype, argtypes)
367 tree basetype, rettype, argtypes;
368{
369 register tree t;
370 tree ptype;
371 int hashcode;
372
373 /* Make a node of the sort we want. */
374 t = make_node (METHOD_TYPE);
375
376 TYPE_METHOD_BASETYPE (t) = TYPE_MAIN_VARIANT (basetype);
377 TREE_TYPE (t) = rettype;
378 if (IS_SIGNATURE (basetype))
|
434 ptype = build_signature_pointer_type (TYPE_MAIN_VARIANT (basetype),
435 TYPE_READONLY (basetype),
436 TYPE_VOLATILE (basetype));
|
| 379 ptype = build_signature_pointer_type (basetype); |
380 else
381 ptype = build_pointer_type (basetype);
382
383 /* The actual arglist for this function includes a "hidden" argument
384 which is "this". Put it into the list of argument types. */
385
386 argtypes = tree_cons (NULL_TREE, ptype, argtypes);
387 TYPE_ARG_TYPES (t) = argtypes;
388 TREE_SIDE_EFFECTS (argtypes) = 1; /* Mark first argtype as "artificial". */
389
390 /* If we already have such a type, use the old one and free this one.
391 Note that it also frees up the above cons cell if found. */
392 hashcode = TYPE_HASH (basetype) + TYPE_HASH (rettype) + type_hash_list (argtypes);
393 t = type_hash_canon (hashcode, t);
394
395 if (TYPE_SIZE (t) == 0)
396 layout_type (t);
397
398 return t;
399}
400
401static tree
402build_cplus_array_type_1 (elt_type, index_type)
403 tree elt_type;
404 tree index_type;
405{
406 register struct obstack *ambient_obstack = current_obstack;
407 register struct obstack *ambient_saveable_obstack = saveable_obstack;
408 tree t;
409
410 /* We need a new one. If both ELT_TYPE and INDEX_TYPE are permanent,
411 make this permanent too. */
412 if (TREE_PERMANENT (elt_type)
413 && (index_type == 0 || TREE_PERMANENT (index_type)))
414 {
415 current_obstack = &permanent_obstack;
416 saveable_obstack = &permanent_obstack;
417 }
418
|
476 if (processing_template_decl
|
419 if (processing_template_decl
420 || uses_template_parms (elt_type) |
421 || uses_template_parms (index_type))
422 {
423 t = make_node (ARRAY_TYPE);
424 TREE_TYPE (t) = elt_type;
425 TYPE_DOMAIN (t) = index_type;
426 }
427 else
428 t = build_array_type (elt_type, index_type);
429
430 /* Push these needs up so that initialization takes place
431 more easily. */
432 TYPE_NEEDS_CONSTRUCTING (t) = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
433 TYPE_NEEDS_DESTRUCTOR (t) = TYPE_NEEDS_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
434 current_obstack = ambient_obstack;
435 saveable_obstack = ambient_saveable_obstack;
436 return t;
437}
438
439tree
440build_cplus_array_type (elt_type, index_type)
441 tree elt_type;
442 tree index_type;
443{
444 tree t;
|
501 int constp = TYPE_READONLY (elt_type);
502 int volatilep = TYPE_VOLATILE (elt_type);
|
445 int type_quals = CP_TYPE_QUALS (elt_type);
446 |
447 elt_type = TYPE_MAIN_VARIANT (elt_type);
448
449 t = build_cplus_array_type_1 (elt_type, index_type);
450
|
507 if (constp || volatilep)
508 t = cp_build_type_variant (t, constp, volatilep);
|
451 if (type_quals != TYPE_UNQUALIFIED)
452 t = cp_build_qualified_type (t, type_quals); |
453
454 return t;
455}
456
457/* Make a variant type in the proper way for C/C++, propagating qualifiers
458 down to the element type of an array. */
459
460tree
|
517cp_build_type_variant (type, constp, volatilep)
|
| 461cp_build_qualified_type (type, type_quals) |
462 tree type;
|
519 int constp, volatilep;
|
| 463 int type_quals; |
464{
465 if (type == error_mark_node)
466 return type;
467
|
468 /* A restrict-qualified pointer type must be a pointer (or reference)
469 to object or incomplete type. */
470 if ((type_quals & TYPE_QUAL_RESTRICT)
471 && (!POINTER_TYPE_P (type)
472 || TYPE_PTRMEM_P (type)
473 || TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE))
474 {
475 cp_error ("`%T' cannot be `restrict'-qualified", type);
476 type_quals &= ~TYPE_QUAL_RESTRICT;
477 }
478 |
479 if (TREE_CODE (type) == ARRAY_TYPE)
480 {
481 tree real_main_variant = TYPE_MAIN_VARIANT (type);
482
483 push_obstacks (TYPE_OBSTACK (real_main_variant),
484 TYPE_OBSTACK (real_main_variant));
|
530 type = build_cplus_array_type_1 (cp_build_type_variant
531 (TREE_TYPE (type), constp, volatilep),
|
485 type = build_cplus_array_type_1 (cp_build_qualified_type
486 (TREE_TYPE (type), type_quals), |
487 TYPE_DOMAIN (type));
488
489 /* TYPE must be on same obstack as REAL_MAIN_VARIANT. If not,
490 make a copy. (TYPE might have come from the hash table and
491 REAL_MAIN_VARIANT might be in some function's obstack.) */
492
493 if (TYPE_OBSTACK (type) != TYPE_OBSTACK (real_main_variant))
494 {
495 type = copy_node (type);
496 TYPE_POINTER_TO (type) = TYPE_REFERENCE_TO (type) = 0;
497 }
498
499 TYPE_MAIN_VARIANT (type) = real_main_variant;
500 pop_obstacks ();
501 return type;
502 }
|
548 return build_type_variant (type, constp, volatilep);
|
| 503 return build_qualified_type (type, type_quals); |
504}
505
506/* Returns the canonical version of TYPE. In other words, if TYPE is
507 a typedef, returns the underlying type. The cv-qualification of
508 the type returned matches the type input; they will always be
509 compatible types. */
510
511tree
512canonical_type_variant (t)
513 tree t;
514{
|
560 int constp, volatilep;
561 if (TREE_CODE (t) == ARRAY_TYPE)
562 {
563 constp = TYPE_READONLY (TREE_TYPE (t));
564 volatilep = TYPE_VOLATILE (TREE_TYPE (t));
565 }
566 else
567 {
568 constp = TYPE_READONLY (t);
569 volatilep = TYPE_VOLATILE (t);
570 }
571 return cp_build_type_variant (TYPE_MAIN_VARIANT (t), constp, volatilep);
|
| 515 return cp_build_qualified_type (TYPE_MAIN_VARIANT (t), CP_TYPE_QUALS (t)); |
516}
517
518/* Add OFFSET to all base types of T.
519
520 OFFSET, which is a type offset, is number of bytes.
521
522 Note that we don't have to worry about having two paths to the
523 same base type, since this type owns its association list. */
524
525static void
526propagate_binfo_offsets (binfo, offset)
527 tree binfo;
528 tree offset;
529{
530 tree binfos = BINFO_BASETYPES (binfo);
531 int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0;
532
533 for (i = 0; i < n_baselinks; /* note increment is done in the loop. */)
534 {
535 tree base_binfo = TREE_VEC_ELT (binfos, i);
536
537 if (TREE_VIA_VIRTUAL (base_binfo))
538 i += 1;
539 else
540 {
541 int j;
542 tree delta = NULL_TREE;
543
544 for (j = i+1; j < n_baselinks; j++)
545 if (! TREE_VIA_VIRTUAL (TREE_VEC_ELT (binfos, j)))
546 {
547 /* The next basetype offset must take into account the space
548 between the classes, not just the size of each class. */
549 delta = size_binop (MINUS_EXPR,
550 BINFO_OFFSET (TREE_VEC_ELT (binfos, j)),
551 BINFO_OFFSET (base_binfo));
552 break;
553 }
554
555#if 0
556 if (BINFO_OFFSET_ZEROP (base_binfo))
557 BINFO_OFFSET (base_binfo) = offset;
558 else
559 BINFO_OFFSET (base_binfo)
560 = size_binop (PLUS_EXPR, BINFO_OFFSET (base_binfo), offset);
561#else
562 BINFO_OFFSET (base_binfo) = offset;
563#endif
564
|
621 unshare_base_binfos (base_binfo);
|
| 565 propagate_binfo_offsets (base_binfo, offset); |
566
567 /* Go to our next class that counts for offset propagation. */
568 i = j;
569 if (i < n_baselinks)
570 offset = size_binop (PLUS_EXPR, offset, delta);
571 }
572 }
573}
574
|
631/* Makes new binfos for the indirect bases under BASE_BINFO, and updates
|
| 575/* Makes new binfos for the indirect bases under BINFO, and updates |
576 BINFO_OFFSET for them and their bases. */
577
|
634static void
635unshare_base_binfos (base_binfo)
636 tree base_binfo;
|
578void
579unshare_base_binfos (binfo)
580 tree binfo; |
581{
|
638 if (BINFO_BASETYPES (base_binfo))
639 {
640 tree base_binfos = BINFO_BASETYPES (base_binfo);
641 tree chain = NULL_TREE;
642 int j;
|
582 tree binfos = BINFO_BASETYPES (binfo);
583 tree new_binfo;
584 int j; |
585
|
644 /* Now unshare the structure beneath BASE_BINFO. */
645 for (j = TREE_VEC_LENGTH (base_binfos)-1;
646 j >= 0; j--)
647 {
648 tree base_base_binfo = TREE_VEC_ELT (base_binfos, j);
649 if (! TREE_VIA_VIRTUAL (base_base_binfo))
650 TREE_VEC_ELT (base_binfos, j)
651 = make_binfo (BINFO_OFFSET (base_base_binfo),
652 base_base_binfo,
653 BINFO_VTABLE (base_base_binfo),
654 BINFO_VIRTUALS (base_base_binfo),
655 chain);
656 chain = TREE_VEC_ELT (base_binfos, j);
657 TREE_VIA_PUBLIC (chain) = TREE_VIA_PUBLIC (base_base_binfo);
658 TREE_VIA_PROTECTED (chain) = TREE_VIA_PROTECTED (base_base_binfo);
659 BINFO_INHERITANCE_CHAIN (chain) = base_binfo;
660 }
|
586 if (binfos == NULL_TREE)
587 return; |
588
|
662 /* Completely unshare potentially shared data, and
663 update what is ours. */
664 propagate_binfo_offsets (base_binfo, BINFO_OFFSET (base_binfo));
|
589 /* Now unshare the structure beneath BINFO. */
590 for (j = TREE_VEC_LENGTH (binfos)-1;
591 j >= 0; j--)
592 {
593 tree base_binfo = TREE_VEC_ELT (binfos, j);
594 new_binfo = TREE_VEC_ELT (binfos, j)
595 = make_binfo (BINFO_OFFSET (base_binfo),
596 base_binfo,
597 BINFO_VTABLE (base_binfo),
598 BINFO_VIRTUALS (base_binfo));
599 TREE_VIA_PUBLIC (new_binfo) = TREE_VIA_PUBLIC (base_binfo);
600 TREE_VIA_PROTECTED (new_binfo) = TREE_VIA_PROTECTED (base_binfo);
601 TREE_VIA_VIRTUAL (new_binfo) = TREE_VIA_VIRTUAL (base_binfo);
602 BINFO_INHERITANCE_CHAIN (new_binfo) = binfo;
603 unshare_base_binfos (new_binfo); |
604 }
605}
606
607/* Finish the work of layout_record, now taking virtual bases into account.
608 Also compute the actual offsets that our base classes will have.
609 This must be performed after the fields are laid out, since virtual
610 baseclasses must lay down at the end of the record.
611
612 Returns the maximum number of virtual functions any of the
613 baseclasses provide. */
614
615int
616layout_basetypes (rec, max)
617 tree rec;
618 int max;
619{
620 tree binfos = TYPE_BINFO_BASETYPES (rec);
621 int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0;
622
|
684 /* Get all the virtual base types that this type uses.
685 The TREE_VALUE slot holds the virtual baseclass type. */
686 tree vbase_types = get_vbase_types (rec);
|
| 623 tree vbase_types; |
624
625 unsigned int record_align = MAX (BITS_PER_UNIT, TYPE_ALIGN (rec));
626 unsigned int desired_align;
627
628 /* Record size so far is CONST_SIZE bits, where CONST_SIZE is an integer. */
629 register unsigned int const_size = 0;
630 unsigned int nonvirtual_const_size;
631
632#ifdef STRUCTURE_SIZE_BOUNDARY
633 /* Packed structures don't need to have minimum size. */
634 if (! TYPE_PACKED (rec))
635 record_align = MAX (record_align, STRUCTURE_SIZE_BOUNDARY);
636#endif
637
|
701 CLASSTYPE_VBASECLASSES (rec) = vbase_types;
|
638 /* Get all the virtual base types that this type uses. The
639 TREE_VALUE slot holds the virtual baseclass type. Note that
640 get_vbase_types makes copies of the virtual base BINFOs, so that
641 the vbase_types are unshared. */
642 vbase_types = CLASSTYPE_VBASECLASSES (rec); |
643
644 my_friendly_assert (TREE_CODE (TYPE_SIZE (rec)) == INTEGER_CST, 19970302);
645 const_size = TREE_INT_CST_LOW (TYPE_SIZE (rec));
646
647 nonvirtual_const_size = const_size;
648
649 while (vbase_types)
650 {
651 tree basetype = BINFO_TYPE (vbase_types);
652 tree offset;
653
654 desired_align = TYPE_ALIGN (basetype);
655 record_align = MAX (record_align, desired_align);
656
657 if (const_size == 0)
658 offset = integer_zero_node;
659 else
660 {
661 /* Give each virtual base type the alignment it wants. */
662 const_size = CEIL (const_size, desired_align) * desired_align;
663 offset = size_int (CEIL (const_size, BITS_PER_UNIT));
664 }
665
666 if (CLASSTYPE_VSIZE (basetype) > max)
667 max = CLASSTYPE_VSIZE (basetype);
668 BINFO_OFFSET (vbase_types) = offset;
669
670 /* Every virtual baseclass takes a least a UNIT, so that we can
671 take it's address and get something different for each base. */
672 const_size += MAX (BITS_PER_UNIT,
673 TREE_INT_CST_LOW (CLASSTYPE_SIZE (basetype)));
674
675 vbase_types = TREE_CHAIN (vbase_types);
676 }
677
678 if (const_size)
679 {
680 /* Because a virtual base might take a single byte above,
681 we have to re-adjust the total size to make sure it is
682 a multiple of the alignment. */
683 /* Give the whole object the alignment it wants. */
684 const_size = CEIL (const_size, record_align) * record_align;
685 }
686
687 /* Set the alignment in the complete type. We don't set CLASSTYPE_ALIGN
688 here, as that is for this class, without any virtual base classes. */
689 TYPE_ALIGN (rec) = record_align;
690 if (const_size != nonvirtual_const_size)
691 {
692 TYPE_SIZE (rec) = size_int (const_size);
693 TYPE_SIZE_UNIT (rec) = size_binop (FLOOR_DIV_EXPR, TYPE_SIZE (rec),
694 size_int (BITS_PER_UNIT));
695 }
696
697 /* Now propagate offset information throughout the lattice. */
698 for (i = 0; i < n_baseclasses; i++)
699 {
700 register tree base_binfo = TREE_VEC_ELT (binfos, i);
701 register tree basetype = BINFO_TYPE (base_binfo);
702 tree field = TYPE_FIELDS (rec);
703
704 if (TREE_VIA_VIRTUAL (base_binfo))
705 continue;
706
707 my_friendly_assert (TREE_TYPE (field) == basetype, 23897);
|
708
709 if (get_base_distance (basetype, rec, 0, (tree*)0) == -2)
710 cp_warning ("direct base `%T' inaccessible in `%T' due to ambiguity",
711 basetype, rec);
712 |
713 BINFO_OFFSET (base_binfo)
714 = size_int (CEIL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field)),
715 BITS_PER_UNIT));
|
770 unshare_base_binfos (base_binfo);
|
| 716 propagate_binfo_offsets (base_binfo, BINFO_OFFSET (base_binfo)); |
717 TYPE_FIELDS (rec) = TREE_CHAIN (field);
718 }
719
720 for (vbase_types = CLASSTYPE_VBASECLASSES (rec); vbase_types;
721 vbase_types = TREE_CHAIN (vbase_types))
722 {
723 BINFO_INHERITANCE_CHAIN (vbase_types) = TYPE_BINFO (rec);
724 unshare_base_binfos (vbase_types);
|
725 propagate_binfo_offsets (vbase_types, BINFO_OFFSET (vbase_types));
726
727 if (extra_warnings)
728 {
729 tree basetype = BINFO_TYPE (vbase_types);
730 if (get_base_distance (basetype, rec, 0, (tree*)0) == -2)
731 cp_warning ("virtual base `%T' inaccessible in `%T' due to ambiguity",
732 basetype, rec);
733 } |
734 }
735
736 return max;
737}
738
739/* If the empty base field in DECL overlaps with a base of the same type in
740 NEWDECL, which is either another base field or the first data field of
741 the class, pad the base just before NEWDECL and return 1. Otherwise,
742 return 0. */
743
744static int
745avoid_overlap (decl, newdecl)
746 tree decl, newdecl;
747{
748 tree field;
749
750 if (newdecl == NULL_TREE
751 || ! types_overlap_p (TREE_TYPE (decl), TREE_TYPE (newdecl)))
752 return 0;
753
754 for (field = decl; TREE_CHAIN (field) && TREE_CHAIN (field) != newdecl;
755 field = TREE_CHAIN (field))
756 ;
757
758 DECL_SIZE (field) = integer_one_node;
759
760 return 1;
761}
762
763/* Returns a list of fields to stand in for the base class subobjects
764 of REC. These fields are later removed by layout_basetypes. */
765
766tree
767build_base_fields (rec)
768 tree rec;
769{
770 /* Chain to hold all the new FIELD_DECLs which stand in for base class
771 subobjects. */
772 tree base_decls = NULL_TREE;
773 tree binfos = TYPE_BINFO_BASETYPES (rec);
774 int n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0;
775 tree decl, nextdecl;
776 int i, saw_empty = 0;
777 unsigned int base_align = 0;
778
779 for (i = 0; i < n_baseclasses; ++i)
780 {
781 register tree base_binfo = TREE_VEC_ELT (binfos, i);
782 register tree basetype = BINFO_TYPE (base_binfo);
783
784 if (TYPE_SIZE (basetype) == 0)
785 /* This error is now reported in xref_tag, thus giving better
786 location information. */
787 continue;
788
789 if (TREE_VIA_VIRTUAL (base_binfo))
790 continue;
791
792 decl = build_lang_field_decl (FIELD_DECL, NULL_TREE, basetype);
793 DECL_ARTIFICIAL (decl) = 1;
794 DECL_FIELD_CONTEXT (decl) = DECL_CLASS_CONTEXT (decl) = rec;
795 DECL_SIZE (decl) = CLASSTYPE_SIZE (basetype);
796 DECL_ALIGN (decl) = CLASSTYPE_ALIGN (basetype);
797 TREE_CHAIN (decl) = base_decls;
798 base_decls = decl;
799
800 if (! flag_new_abi)
801 {
802 /* Brain damage for backwards compatibility. For no good reason,
803 the old layout_basetypes made every base at least as large as
804 the alignment for the bases up to that point, gratuitously
805 wasting space. So we do the same thing here. */
806 base_align = MAX (base_align, DECL_ALIGN (decl));
807 DECL_SIZE (decl)
808 = size_int (MAX (TREE_INT_CST_LOW (DECL_SIZE (decl)),
|
854 base_align));
|
| 809 (int) base_align)); |
810 }
811 else if (DECL_SIZE (decl) == integer_zero_node)
812 saw_empty = 1;
813 }
814
815 /* Reverse the list of fields so we allocate the bases in the proper
816 order. */
817 base_decls = nreverse (base_decls);
818
819 /* In the presence of empty base classes, we run the risk of allocating
820 two objects of the same class on top of one another. Avoid that. */
821 if (flag_new_abi && saw_empty)
822 for (decl = base_decls; decl; decl = TREE_CHAIN (decl))
823 {
824 if (DECL_SIZE (decl) == integer_zero_node)
825 {
826 /* First step through the following bases until we find
827 an overlap or a non-empty base. */
828 for (nextdecl = TREE_CHAIN (decl); nextdecl;
829 nextdecl = TREE_CHAIN (nextdecl))
830 {
831 if (avoid_overlap (decl, nextdecl)
832 || DECL_SIZE (nextdecl) != integer_zero_node)
833 goto nextbase;
834 }
835
836 /* If we're still looking, also check against the first
837 field. */
838 for (nextdecl = TYPE_FIELDS (rec);
839 nextdecl && TREE_CODE (nextdecl) != FIELD_DECL;
840 nextdecl = TREE_CHAIN (nextdecl))
841 /* keep looking */;
842 avoid_overlap (decl, nextdecl);
843 }
844 nextbase:;
845 }
846
847 return base_decls;
848}
849
850/* Returns list of virtual base class pointers in a FIELD_DECL chain. */
851
852tree
853build_vbase_pointer_fields (rec)
854 tree rec;
855{
856 /* Chain to hold all the new FIELD_DECLs which point at virtual
857 base classes. */
858 tree vbase_decls = NULL_TREE;
859 tree binfos = TYPE_BINFO_BASETYPES (rec);
860 int n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0;
861 tree decl;
862 int i;
863
864 /* Handle basetypes almost like fields, but record their
865 offsets differently. */
866
867 for (i = 0; i < n_baseclasses; i++)
868 {
869 register tree base_binfo = TREE_VEC_ELT (binfos, i);
870 register tree basetype = BINFO_TYPE (base_binfo);
871
872 if (TYPE_SIZE (basetype) == 0)
873 /* This error is now reported in xref_tag, thus giving better
874 location information. */
875 continue;
876
877 /* All basetypes are recorded in the association list of the
878 derived type. */
879
880 if (TREE_VIA_VIRTUAL (base_binfo))
881 {
882 int j;
|
928 char *name = (char *)alloca (TYPE_NAME_LENGTH (basetype)
929 + sizeof (VBASE_NAME) + 1);
|
| 883 const char *name; |
884
885 /* The offset for a virtual base class is only used in computing
886 virtual function tables and for initializing virtual base
887 pointers. It is built once `get_vbase_types' is called. */
888
889 /* If this basetype can come from another vbase pointer
890 without an additional indirection, we will share
891 that pointer. If an indirection is involved, we
892 make our own pointer. */
893 for (j = 0; j < n_baseclasses; j++)
894 {
895 tree other_base_binfo = TREE_VEC_ELT (binfos, j);
896 if (! TREE_VIA_VIRTUAL (other_base_binfo)
897 && binfo_member (basetype,
898 CLASSTYPE_VBASECLASSES (BINFO_TYPE
899 (other_base_binfo))
900 ))
901 goto got_it;
902 }
|
949 sprintf (name, VBASE_NAME_FORMAT, TYPE_NAME_STRING (basetype));
|
| 903 FORMAT_VBASE_NAME (name, basetype); |
904 decl = build_lang_field_decl (FIELD_DECL, get_identifier (name),
905 build_pointer_type (basetype));
906 /* If you change any of the below, take a look at all the
907 other VFIELD_BASEs and VTABLE_BASEs in the code, and change
908 them too. */
909 DECL_ASSEMBLER_NAME (decl) = get_identifier (VTABLE_BASE);
910 DECL_VIRTUAL_P (decl) = 1;
911 DECL_ARTIFICIAL (decl) = 1;
912 DECL_FIELD_CONTEXT (decl) = rec;
913 DECL_CLASS_CONTEXT (decl) = rec;
914 DECL_FCONTEXT (decl) = basetype;
915 DECL_SAVED_INSNS (decl) = NULL_RTX;
916 DECL_FIELD_SIZE (decl) = 0;
917 DECL_ALIGN (decl) = TYPE_ALIGN (ptr_type_node);
918 TREE_CHAIN (decl) = vbase_decls;
919 BINFO_VPTR_FIELD (base_binfo) = decl;
920 vbase_decls = decl;
921
922 got_it:
923 /* The space this decl occupies has already been accounted for. */
924 ;
925 }
926 }
927
928 return vbase_decls;
929}
930
931/* Hashing of lists so that we don't make duplicates.
932 The entry point is `list_hash_canon'. */
933
934/* Each hash table slot is a bucket containing a chain
935 of these structures. */
936
937struct list_hash
938{
939 struct list_hash *next; /* Next structure in the bucket. */
940 int hashcode; /* Hash code of this list. */
941 tree list; /* The list recorded here. */
942};
943
944/* Now here is the hash table. When recording a list, it is added
945 to the slot whose index is the hash code mod the table size.
946 Note that the hash table is used for several kinds of lists.
947 While all these live in the same table, they are completely independent,
948 and the hash code is computed differently for each of these. */
949
950#define TYPE_HASH_SIZE 59
951static struct list_hash *list_hash_table[TYPE_HASH_SIZE];
952
953/* Compute a hash code for a list (chain of TREE_LIST nodes
954 with goodies in the TREE_PURPOSE, TREE_VALUE, and bits of the
955 TREE_COMMON slots), by adding the hash codes of the individual entries. */
956
957static int
958list_hash (purpose, value, chain)
959 tree purpose, value, chain;
960{
961 register int hashcode = 0;
962
963 if (chain)
964 hashcode += TYPE_HASH (chain);
965
966 if (value)
967 hashcode += TYPE_HASH (value);
968 else
969 hashcode += 1007;
970 if (purpose)
971 hashcode += TYPE_HASH (purpose);
972 else
973 hashcode += 1009;
974 return hashcode;
975}
976
977/* Look in the type hash table for a type isomorphic to TYPE.
978 If one is found, return it. Otherwise return 0. */
979
980static tree
|
1027list_hash_lookup (hashcode, via_public, via_protected, via_virtual,
1028 purpose, value, chain)
1029 int hashcode, via_public, via_virtual, via_protected;
|
981list_hash_lookup (hashcode, purpose, value, chain)
982 int hashcode; |
983 tree purpose, value, chain;
984{
985 register struct list_hash *h;
986
987 for (h = list_hash_table[hashcode % TYPE_HASH_SIZE]; h; h = h->next)
988 if (h->hashcode == hashcode
|
1036 && TREE_VIA_VIRTUAL (h->list) == via_virtual
1037 && TREE_VIA_PUBLIC (h->list) == via_public
1038 && TREE_VIA_PROTECTED (h->list) == via_protected
|
989 && TREE_PURPOSE (h->list) == purpose
990 && TREE_VALUE (h->list) == value
991 && TREE_CHAIN (h->list) == chain)
992 return h->list;
993 return 0;
994}
995
996/* Add an entry to the list-hash-table
997 for a list TYPE whose hash code is HASHCODE. */
998
999static void
1000list_hash_add (hashcode, list)
1001 int hashcode;
1002 tree list;
1003{
1004 register struct list_hash *h;
1005
1006 h = (struct list_hash *) obstack_alloc (&class_obstack, sizeof (struct list_hash));
1007 h->hashcode = hashcode;
1008 h->list = list;
1009 h->next = list_hash_table[hashcode % TYPE_HASH_SIZE];
1010 list_hash_table[hashcode % TYPE_HASH_SIZE] = h;
1011}
1012
|
1063/* Given TYPE, and HASHCODE its hash code, return the canonical
1064 object for an identical list if one already exists.
1065 Otherwise, return TYPE, and record it as the canonical object
1066 if it is a permanent object.
|
1013/* Given list components PURPOSE, VALUE, AND CHAIN, return the canonical
1014 object for an identical list if one already exists. Otherwise, build a
1015 new one, and record it as the canonical object. */ |
1016
|
1068 To use this function, first create a list of the sort you want.
1069 Then compute its hash code from the fields of the list that
1070 make it different from other similar lists.
1071 Then call this function and use the value.
1072 This function frees the list you pass in if it is a duplicate. */
1073
|
1017/* Set to 1 to debug without canonicalization. Never set by program. */
1018
1019static int debug_no_list_hash = 0;
1020
1021tree
|
1079hash_tree_cons (via_public, via_virtual, via_protected, purpose, value, chain)
1080 int via_public, via_virtual, via_protected;
|
| 1022hash_tree_cons (purpose, value, chain) |
1023 tree purpose, value, chain;
1024{
1025 struct obstack *ambient_obstack = current_obstack;
1026 tree t;
1027 int hashcode = 0;
1028
1029 if (! debug_no_list_hash)
1030 {
1031 hashcode = list_hash (purpose, value, chain);
|
1090 t = list_hash_lookup (hashcode, via_public, via_protected, via_virtual,
1091 purpose, value, chain);
|
| 1032 t = list_hash_lookup (hashcode, purpose, value, chain); |
1033 if (t)
1034 return t;
1035 }
1036
1037 current_obstack = &class_obstack;
1038
1039 t = tree_cons (purpose, value, chain);
|
1099 TREE_VIA_PUBLIC (t) = via_public;
1100 TREE_VIA_PROTECTED (t) = via_protected;
1101 TREE_VIA_VIRTUAL (t) = via_virtual;
|
1040
1041 /* If this is a new list, record it for later reuse. */
1042 if (! debug_no_list_hash)
1043 list_hash_add (hashcode, t);
1044
1045 current_obstack = ambient_obstack;
1046 return t;
1047}
1048
1049/* Constructor for hashed lists. */
1050
1051tree
1052hash_tree_chain (value, chain)
1053 tree value, chain;
1054{
|
1117 return hash_tree_cons (0, 0, 0, NULL_TREE, value, chain);
|
| 1055 return hash_tree_cons (NULL_TREE, value, chain); |
1056}
1057
1058/* Similar, but used for concatenating two lists. */
1059
1060tree
1061hash_chainon (list1, list2)
1062 tree list1, list2;
1063{
1064 if (list2 == 0)
1065 return list1;
1066 if (list1 == 0)
1067 return list2;
1068 if (TREE_CHAIN (list1) == NULL_TREE)
1069 return hash_tree_chain (TREE_VALUE (list1), list2);
1070 return hash_tree_chain (TREE_VALUE (list1),
1071 hash_chainon (TREE_CHAIN (list1), list2));
1072}
|
1135
1136static tree
1137get_identifier_list (value)
1138 tree value;
1139{
1140 tree list = IDENTIFIER_AS_LIST (value);
1141 if (list != NULL_TREE
1142 && (TREE_CODE (list) != TREE_LIST
1143 || TREE_VALUE (list) != value))
1144 list = NULL_TREE;
1145 else if (IDENTIFIER_HAS_TYPE_VALUE (value)
1146 && TREE_CODE (IDENTIFIER_TYPE_VALUE (value)) == RECORD_TYPE
1147 && IDENTIFIER_TYPE_VALUE (value)
1148 == TYPE_MAIN_VARIANT (IDENTIFIER_TYPE_VALUE (value)))
1149 {
1150 tree type = IDENTIFIER_TYPE_VALUE (value);
1151
1152 if (TYPE_PTRMEMFUNC_P (type))
1153 list = NULL_TREE;
1154 else if (type == current_class_type)
1155 /* Don't mess up the constructor name. */
1156 list = tree_cons (NULL_TREE, value, NULL_TREE);
1157 else
1158 {
1159 if (! CLASSTYPE_ID_AS_LIST (type))
1160 CLASSTYPE_ID_AS_LIST (type)
1161 = perm_tree_cons (NULL_TREE, TYPE_IDENTIFIER (type), NULL_TREE);
1162 list = CLASSTYPE_ID_AS_LIST (type);
1163 }
1164 }
1165 return list;
1166}
1167
1168tree
1169get_decl_list (value)
1170 tree value;
1171{
1172 tree list = NULL_TREE;
1173
1174 if (TREE_CODE (value) == IDENTIFIER_NODE)
1175 list = get_identifier_list (value);
1176 else if (TREE_CODE (value) == RECORD_TYPE
1177 && TYPE_LANG_SPECIFIC (value)
1178 && value == TYPE_MAIN_VARIANT (value))
1179 list = CLASSTYPE_AS_LIST (value);
1180
1181 if (list != NULL_TREE)
1182 {
1183 my_friendly_assert (TREE_CHAIN (list) == NULL_TREE, 301);
1184 return list;
1185 }
1186
1187 return build_decl_list (NULL_TREE, value);
1188}
|
1073
1074/* Build an association between TYPE and some parameters:
1075
1076 OFFSET is the offset added to `this' to convert it to a pointer
1077 of type `TYPE *'
1078
1079 BINFO is the base binfo to use, if we are deriving from one. This
1080 is necessary, as we want specialized parent binfos from base
1081 classes, so that the VTABLE_NAMEs of bases are for the most derived
1082 type, instead of the simple type.
1083
1084 VTABLE is the virtual function table with which to initialize
1085 sub-objects of type TYPE.
1086
|
1203 VIRTUALS are the virtual functions sitting in VTABLE.
|
| 1087 VIRTUALS are the virtual functions sitting in VTABLE. */ |
1088
|
1205 CHAIN are more associations we must retain. */
1206
|
1089tree
|
1208make_binfo (offset, binfo, vtable, virtuals, chain)
|
| 1090make_binfo (offset, binfo, vtable, virtuals) |
1091 tree offset, binfo;
1092 tree vtable, virtuals;
|
1211 tree chain;
|
1093{
1094 tree new_binfo = make_tree_vec (7);
1095 tree type;
1096
1097 if (TREE_CODE (binfo) == TREE_VEC)
1098 type = BINFO_TYPE (binfo);
1099 else
1100 {
1101 type = binfo;
|
1221 binfo = TYPE_BINFO (binfo);
|
| 1102 binfo = CLASS_TYPE_P (type) ? TYPE_BINFO (binfo) : NULL_TREE; |
1103 }
1104
|
1224 TREE_CHAIN (new_binfo) = chain;
1225 if (chain)
1226 TREE_USED (new_binfo) = TREE_USED (chain);
1227
|
1105 TREE_TYPE (new_binfo) = TYPE_MAIN_VARIANT (type);
1106 BINFO_OFFSET (new_binfo) = offset;
1107 BINFO_VTABLE (new_binfo) = vtable;
1108 BINFO_VIRTUALS (new_binfo) = virtuals;
1109 BINFO_VPTR_FIELD (new_binfo) = NULL_TREE;
1110
1111 if (binfo && BINFO_BASETYPES (binfo) != NULL_TREE)
1112 BINFO_BASETYPES (new_binfo) = copy_node (BINFO_BASETYPES (binfo));
1113 return new_binfo;
1114}
1115
1116/* Return the binfo value for ELEM in TYPE. */
1117
1118tree
1119binfo_value (elem, type)
1120 tree elem;
1121 tree type;
1122{
1123 if (get_base_distance (elem, type, 0, (tree *)0) == -2)
1124 compiler_error ("base class `%s' ambiguous in binfo_value",
1125 TYPE_NAME_STRING (elem));
1126 if (elem == type)
1127 return TYPE_BINFO (type);
1128 if (TREE_CODE (elem) == RECORD_TYPE && TYPE_BINFO (elem) == type)
1129 return type;
1130 return get_binfo (elem, type, 0);
1131}
1132
|
1133/* Return a reversed copy of the BINFO-chain given by PATH. (If the
1134 BINFO_INHERITANCE_CHAIN points from base classes to derived
1135 classes, it will instead point from derived classes to base
1136 classes.) Returns the first node in the reversed chain. */
1137 |
1138tree
1139reverse_path (path)
1140 tree path;
1141{
|
1260 register tree prev = 0, tmp, next;
1261 for (tmp = path; tmp; tmp = next)
|
1142 register tree prev = NULL_TREE, cur;
1143 push_expression_obstack ();
1144 for (cur = path; cur; cur = BINFO_INHERITANCE_CHAIN (cur)) |
1145 {
|
1263 next = BINFO_INHERITANCE_CHAIN (tmp);
1264 BINFO_INHERITANCE_CHAIN (tmp) = prev;
1265 prev = tmp;
|
1146 tree r = copy_node (cur);
1147 BINFO_INHERITANCE_CHAIN (r) = prev;
1148 prev = r; |
1149 }
|
| 1150 pop_obstacks (); |
1151 return prev;
1152}
1153
1154void
1155debug_binfo (elem)
1156 tree elem;
1157{
1158 unsigned HOST_WIDE_INT n;
1159 tree virtuals;
1160
1161 fprintf (stderr, "type \"%s\"; offset = %ld\n",
1162 TYPE_NAME_STRING (BINFO_TYPE (elem)),
1163 (long) TREE_INT_CST_LOW (BINFO_OFFSET (elem)));
1164 fprintf (stderr, "vtable type:\n");
1165 debug_tree (BINFO_TYPE (elem));
1166 if (BINFO_VTABLE (elem))
1167 fprintf (stderr, "vtable decl \"%s\"\n", IDENTIFIER_POINTER (DECL_NAME (BINFO_VTABLE (elem))));
1168 else
1169 fprintf (stderr, "no vtable decl yet\n");
1170 fprintf (stderr, "virtuals:\n");
1171 virtuals = BINFO_VIRTUALS (elem);
1172
|
1289 n = skip_rtti_stuff (&virtuals);
|
| 1173 n = skip_rtti_stuff (&virtuals, BINFO_TYPE (elem)); |
1174
1175 while (virtuals)
1176 {
1177 tree fndecl = TREE_OPERAND (FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (virtuals)), 0);
1178 fprintf (stderr, "%s [%ld =? %ld]\n",
1179 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)),
1180 (long) n, (long) TREE_INT_CST_LOW (DECL_VINDEX (fndecl)));
1181 ++n;
1182 virtuals = TREE_CHAIN (virtuals);
1183 }
1184}
1185
1186/* Initialize an CPLUS_BINDING node that does not live on an obstack. */
1187
1188tree
1189binding_init (node)
1190 struct tree_binding* node;
1191{
1192 static struct tree_binding* source;
1193 if (!source)
1194 {
1195 extern struct obstack permanent_obstack;
1196 push_obstacks (&permanent_obstack, &permanent_obstack);
1197 source = (struct tree_binding*)make_node (CPLUS_BINDING);
1198 pop_obstacks ();
1199 }
1200 *node = *source;
1201 TREE_PERMANENT ((tree)node) = 0;
1202 return (tree)node;
1203}
1204
1205int
1206count_functions (t)
1207 tree t;
1208{
1209 int i;
1210 if (TREE_CODE (t) == FUNCTION_DECL)
1211 return 1;
1212 else if (TREE_CODE (t) == OVERLOAD)
1213 {
1214 for (i=0; t; t = OVL_CHAIN (t))
1215 i++;
1216 return i;
1217 }
1218
1219 my_friendly_abort (359);
1220 return 0;
1221}
1222
1223int
1224is_overloaded_fn (x)
1225 tree x;
1226{
|
1343 /* XXX A baselink is also considered an overloaded function.
1344 As is a placeholder from push_class_decls. */
1345 if (TREE_CODE (x) == TREE_LIST)
1346 {
1347 my_friendly_assert (TREE_CODE (TREE_PURPOSE (x)) == TREE_VEC
1348 || TREE_CODE (TREE_PURPOSE (x)) == IDENTIFIER_NODE,
1349 388);
1350 x = TREE_VALUE (x);
1351 }
|
1227 /* A baselink is also considered an overloaded function. */
1228 if (TREE_CODE (x) == OFFSET_REF)
1229 x = TREE_OPERAND (x, 1);
1230 if (BASELINK_P (x))
1231 x = TREE_VALUE (x); |
1232 return (TREE_CODE (x) == FUNCTION_DECL
1233 || TREE_CODE (x) == TEMPLATE_ID_EXPR
1234 || DECL_FUNCTION_TEMPLATE_P (x)
1235 || TREE_CODE (x) == OVERLOAD);
1236}
1237
1238int
1239really_overloaded_fn (x)
1240 tree x;
1241{
|
1362 /* A baselink is also considered an overloaded function.
1363 This might also be an ambiguous class member. */
1364 if (TREE_CODE (x) == TREE_LIST)
|
1242 /* A baselink is also considered an overloaded function. */
1243 if (TREE_CODE (x) == OFFSET_REF)
1244 x = TREE_OPERAND (x, 1);
1245 if (BASELINK_P (x)) |
1246 x = TREE_VALUE (x);
1247 return (TREE_CODE (x) == OVERLOAD
1248 && (TREE_CHAIN (x) != NULL_TREE
1249 || DECL_FUNCTION_TEMPLATE_P (OVL_FUNCTION (x))));
1250}
1251
1252tree
1253get_first_fn (from)
1254 tree from;
1255{
1256 my_friendly_assert (is_overloaded_fn (from), 9);
1257 /* A baselink is also considered an overloaded function. */
|
1377 if (TREE_CODE (from) == TREE_LIST)
|
| 1258 if (BASELINK_P (from)) |
1259 from = TREE_VALUE (from);
1260 return OVL_CURRENT (from);
1261}
1262
|
1263/* Returns nonzero if T is a ->* or .* expression that refers to a
1264 member function. */
1265
1266int
1267bound_pmf_p (t)
1268 tree t;
1269{
1270 return (TREE_CODE (t) == OFFSET_REF
1271 && TYPE_PTRMEMFUNC_P (TREE_TYPE (TREE_OPERAND (t, 1))));
1272}
1273 |
1274/* Return a new OVL node, concatenating it with the old one. */
1275
1276tree
1277ovl_cons (decl, chain)
1278 tree decl;
1279 tree chain;
1280{
1281 tree result = make_node (OVERLOAD);
1282 TREE_TYPE (result) = unknown_type_node;
1283 OVL_FUNCTION (result) = decl;
1284 TREE_CHAIN (result) = chain;
1285
1286 return result;
1287}
1288
1289/* Same as ovl_cons, but on the scratch_obstack. */
1290
1291tree
1292scratch_ovl_cons (value, chain)
1293 tree value, chain;
1294{
1295 register tree node;
1296 register struct obstack *ambient_obstack = current_obstack;
1297 extern struct obstack *expression_obstack;
1298 current_obstack = expression_obstack;
1299 node = ovl_cons (value, chain);
1300 current_obstack = ambient_obstack;
1301 return node;
1302}
1303
1304/* Build a new overloaded function. If this is the first one,
1305 just return it; otherwise, ovl_cons the _DECLs */
1306
1307tree
1308build_overload (decl, chain)
1309 tree decl;
1310 tree chain;
1311{
|
1420 if (!chain)
|
| 1312 if (! chain && TREE_CODE (decl) != TEMPLATE_DECL) |
1313 return decl;
|
1422 if (TREE_CODE (chain) != OVERLOAD)
|
| 1314 if (chain && TREE_CODE (chain) != OVERLOAD) |
1315 chain = ovl_cons (chain, NULL_TREE);
1316 return ovl_cons (decl, chain);
1317}
1318
1319/* Returns true iff functions are equivalent. Equivalent functions are
1320 not identical only if one is a function-local extern function.
1321 This assumes that function-locals don't have TREE_PERMANENT. */
1322
1323static int
1324equal_functions (fn1, fn2)
1325 tree fn1;
1326 tree fn2;
1327{
1328 if (!TREE_PERMANENT (fn1) || !TREE_PERMANENT (fn2))
1329 return decls_match (fn1, fn2);
1330 return fn1 == fn2;
1331}
1332
1333/* True if fn is in ovl. */
1334
1335int
1336ovl_member (fn, ovl)
1337 tree fn;
1338 tree ovl;
1339{
1340 if (ovl == NULL_TREE)
1341 return 0;
1342 if (TREE_CODE (ovl) != OVERLOAD)
1343 return equal_functions (ovl, fn);
1344 for (; ovl; ovl = OVL_CHAIN (ovl))
1345 if (equal_functions (OVL_FUNCTION (ovl), fn))
1346 return 1;
1347 return 0;
1348}
1349
1350int
1351is_aggr_type_2 (t1, t2)
1352 tree t1, t2;
1353{
1354 if (TREE_CODE (t1) != TREE_CODE (t2))
1355 return 0;
1356 return IS_AGGR_TYPE (t1) && IS_AGGR_TYPE (t2);
1357}
1358
1359#define PRINT_RING_SIZE 4
1360
1361char *
1362lang_printable_name (decl, v)
1363 tree decl;
1364 int v;
1365{
1366 static tree decl_ring[PRINT_RING_SIZE];
1367 static char *print_ring[PRINT_RING_SIZE];
1368 static int ring_counter;
1369 int i;
1370
1371 /* Only cache functions. */
1372 if (v < 2
1373 || TREE_CODE (decl) != FUNCTION_DECL
1374 || DECL_LANG_SPECIFIC (decl) == 0)
1375 return lang_decl_name (decl, v);
1376
1377 /* See if this print name is lying around. */
1378 for (i = 0; i < PRINT_RING_SIZE; i++)
1379 if (decl_ring[i] == decl)
1380 /* yes, so return it. */
1381 return print_ring[i];
1382
1383 if (++ring_counter == PRINT_RING_SIZE)
1384 ring_counter = 0;
1385
1386 if (current_function_decl != NULL_TREE)
1387 {
1388 if (decl_ring[ring_counter] == current_function_decl)
1389 ring_counter += 1;
1390 if (ring_counter == PRINT_RING_SIZE)
1391 ring_counter = 0;
1392 if (decl_ring[ring_counter] == current_function_decl)
1393 my_friendly_abort (106);
1394 }
1395
1396 if (print_ring[ring_counter])
1397 free (print_ring[ring_counter]);
1398
1399 print_ring[ring_counter] = xstrdup (lang_decl_name (decl, v));
1400 decl_ring[ring_counter] = decl;
1401 return print_ring[ring_counter];
1402}
1403
1404/* Build the FUNCTION_TYPE or METHOD_TYPE which may throw exceptions
1405 listed in RAISES. */
1406
1407tree
1408build_exception_variant (type, raises)
1409 tree type;
1410 tree raises;
1411{
1412 tree v = TYPE_MAIN_VARIANT (type);
|
1521 int constp = TYPE_READONLY (type);
1522 int volatilep = TYPE_VOLATILE (type);
|
| 1413 int type_quals = TYPE_QUALS (type); |
1414
1415 for (; v; v = TYPE_NEXT_VARIANT (v))
1416 {
|
1526 if (TYPE_READONLY (v) != constp
1527 || TYPE_VOLATILE (v) != volatilep)
|
1417 tree t;
1418 tree u;
1419
1420 if (TYPE_QUALS (v) != type_quals) |
1421 continue;
1422
|
1530 /* @@ This should do set equality, not exact match. */
1531 if (simple_cst_list_equal (TYPE_RAISES_EXCEPTIONS (v), raises))
1532 /* List of exceptions raised matches previously found list.
|
1423 for (t = TYPE_RAISES_EXCEPTIONS (v), u = raises;
1424 t != NULL_TREE && u != NULL_TREE;
1425 t = TREE_CHAIN (t), u = TREE_CHAIN (u))
1426 if (((TREE_VALUE (t) != NULL_TREE)
1427 != (TREE_VALUE (u) != NULL_TREE))
1428 || !same_type_p (TREE_VALUE (t), TREE_VALUE (u)))
1429 break; |
1430
|
1534 @@ Nice to free up storage used in consing up the
1535 @@ list of exceptions raised. */
|
1431 if (!t && !u)
1432 /* There's a memory leak here; RAISES is not freed. */ |
1433 return v;
1434 }
1435
1436 /* Need to build a new variant. */
1437 v = build_type_copy (type);
1438
1439 if (raises && ! TREE_PERMANENT (raises))
|
1543 {
1544 push_obstacks_nochange ();
1545 end_temporary_allocation ();
1546 raises = copy_list (raises);
1547 pop_obstacks ();
1548 }
|
| 1440 raises = copy_to_permanent (raises); |
1441
1442 TYPE_RAISES_EXCEPTIONS (v) = raises;
1443 return v;
1444}
1445
1446/* Given a TEMPLATE_TEMPLATE_PARM node T, create a new one together with its
1447 lang_specific field and its corresponding TEMPLATE_DECL node */
1448
1449tree
1450copy_template_template_parm (t)
1451 tree t;
1452{
1453 tree template = TYPE_NAME (t);
|
1562 tree t2 = make_lang_type (TEMPLATE_TEMPLATE_PARM);
|
1454 tree t2;
1455
1456 /* Make sure these end up on the permanent_obstack. */
1457 push_obstacks_nochange ();
1458 end_temporary_allocation ();
1459
1460 t2 = make_lang_type (TEMPLATE_TEMPLATE_PARM); |
1461 template = copy_node (template);
1462 copy_lang_decl (template);
|
1463
1464 pop_obstacks ();
1465 |
1466 TREE_TYPE (template) = t2;
1467 TYPE_NAME (t2) = template;
1468 TYPE_STUB_DECL (t2) = template;
1469
1470 /* No need to copy these */
1471 TYPE_FIELDS (t2) = TYPE_FIELDS (t);
|
1571 CLASSTYPE_TEMPLATE_INFO (t2) = CLASSTYPE_TEMPLATE_INFO (t);
|
1472 TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2)
1473 = TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t); |
1474 return t2;
1475}
1476
|
1575/* Subroutine of copy_to_permanent
|
1477/* Walk through the tree structure T, applying func. If func ever returns
1478 non-null, return that value. */ |
1479
|
1577 Assuming T is a node build bottom-up, make it all exist on
1578 permanent obstack, if it is not permanent already. */
1579
|
1480tree
|
1581mapcar (t, func)
|
| 1481search_tree (t, func) |
1482 tree t;
1483 tree (*func) PROTO((tree));
1484{
|
1485#define TRY(ARG) if (tmp=search_tree (ARG, func), tmp != NULL_TREE) return tmp
1486 |
1487 tree tmp;
1488
1489 if (t == NULL_TREE)
1490 return t;
1491
1492 if (tmp = func (t), tmp != NULL_TREE)
1493 return tmp;
1494
1495 switch (TREE_CODE (t))
1496 {
1497 case ERROR_MARK:
|
1498 break;
1499
1500 case IDENTIFIER_NODE:
1501 break;
1502
1503 case VAR_DECL:
1504 case FUNCTION_DECL:
1505 case CONST_DECL:
1506 case TEMPLATE_DECL:
1507 case NAMESPACE_DECL:
1508 break;
1509
1510 case TYPE_DECL:
1511 TRY (TREE_TYPE (t));
1512 break;
1513
1514 case PARM_DECL:
1515 TRY (TREE_TYPE (t));
1516 TRY (TREE_CHAIN (t));
1517 break;
1518
1519 case TREE_LIST:
1520 TRY (TREE_PURPOSE (t));
1521 TRY (TREE_VALUE (t));
1522 TRY (TREE_CHAIN (t));
1523 break;
1524
1525 case OVERLOAD:
1526 TRY (OVL_FUNCTION (t));
1527 TRY (OVL_CHAIN (t));
1528 break;
1529
1530 case TREE_VEC:
1531 {
1532 int len = TREE_VEC_LENGTH (t);
1533
1534 t = copy_node (t);
1535 while (len--)
1536 TRY (TREE_VEC_ELT (t, len));
1537 }
1538 break;
1539
1540 case INTEGER_CST:
1541 case REAL_CST:
1542 case STRING_CST:
1543 case DEFAULT_ARG:
1544 break;
1545
1546 case PTRMEM_CST:
1547 TRY (TREE_TYPE (t));
1548 break;
1549
1550 case COND_EXPR:
1551 case TARGET_EXPR:
1552 case AGGR_INIT_EXPR:
1553 case NEW_EXPR:
1554 TRY (TREE_OPERAND (t, 0));
1555 TRY (TREE_OPERAND (t, 1));
1556 TRY (TREE_OPERAND (t, 2));
1557 break;
1558
1559 case MODIFY_EXPR:
1560 case PLUS_EXPR:
1561 case MINUS_EXPR:
1562 case MULT_EXPR:
1563 case TRUNC_DIV_EXPR:
1564 case TRUNC_MOD_EXPR:
1565 case MIN_EXPR:
1566 case MAX_EXPR:
1567 case LSHIFT_EXPR:
1568 case RSHIFT_EXPR:
1569 case BIT_IOR_EXPR:
1570 case BIT_XOR_EXPR:
1571 case BIT_AND_EXPR:
1572 case BIT_ANDTC_EXPR:
1573 case TRUTH_ANDIF_EXPR:
1574 case TRUTH_ORIF_EXPR:
1575 case LT_EXPR:
1576 case LE_EXPR:
1577 case GT_EXPR:
1578 case GE_EXPR:
1579 case EQ_EXPR:
1580 case NE_EXPR:
1581 case CEIL_DIV_EXPR:
1582 case FLOOR_DIV_EXPR:
1583 case ROUND_DIV_EXPR:
1584 case CEIL_MOD_EXPR:
1585 case FLOOR_MOD_EXPR:
1586 case ROUND_MOD_EXPR:
1587 case COMPOUND_EXPR:
1588 case PREDECREMENT_EXPR:
1589 case PREINCREMENT_EXPR:
1590 case POSTDECREMENT_EXPR:
1591 case POSTINCREMENT_EXPR:
1592 case ARRAY_REF:
1593 case SCOPE_REF:
1594 case TRY_CATCH_EXPR:
1595 case WITH_CLEANUP_EXPR:
1596 case CALL_EXPR:
1597 TRY (TREE_OPERAND (t, 0));
1598 TRY (TREE_OPERAND (t, 1));
1599 break;
1600
1601 case SAVE_EXPR:
1602 case CONVERT_EXPR:
1603 case ADDR_EXPR:
1604 case INDIRECT_REF:
1605 case NEGATE_EXPR:
1606 case BIT_NOT_EXPR:
1607 case TRUTH_NOT_EXPR:
1608 case NOP_EXPR:
1609 case NON_LVALUE_EXPR:
1610 case COMPONENT_REF:
1611 case CLEANUP_POINT_EXPR:
1612 case LOOKUP_EXPR:
1613 case SIZEOF_EXPR:
1614 case ALIGNOF_EXPR:
1615 TRY (TREE_OPERAND (t, 0));
1616 break;
1617
1618 case MODOP_EXPR:
1619 case CAST_EXPR:
1620 case REINTERPRET_CAST_EXPR:
1621 case CONST_CAST_EXPR:
1622 case STATIC_CAST_EXPR:
1623 case DYNAMIC_CAST_EXPR:
1624 case ARROW_EXPR:
1625 case DOTSTAR_EXPR:
1626 case TYPEID_EXPR:
1627 break;
1628
1629 case COMPLEX_CST:
1630 TRY (TREE_REALPART (t));
1631 TRY (TREE_IMAGPART (t));
1632 break;
1633
1634 case CONSTRUCTOR:
1635 TRY (CONSTRUCTOR_ELTS (t));
1636 break;
1637
1638 case TEMPLATE_TEMPLATE_PARM:
1639 case TEMPLATE_PARM_INDEX:
1640 case TEMPLATE_TYPE_PARM:
1641 break;
1642
1643 case BIND_EXPR:
1644 break;
1645
1646 case REAL_TYPE:
1647 case COMPLEX_TYPE:
1648 case VOID_TYPE:
1649 case BOOLEAN_TYPE:
1650 case TYPENAME_TYPE:
1651 case UNION_TYPE:
1652 case ENUMERAL_TYPE:
1653 case TYPEOF_TYPE:
1654 break;
1655
1656 case POINTER_TYPE:
1657 case REFERENCE_TYPE:
1658 TRY (TREE_TYPE (t));
1659 break;
1660
1661 case FUNCTION_TYPE:
1662 case METHOD_TYPE:
1663 TRY (TREE_TYPE (t));
1664 TRY (TYPE_ARG_TYPES (t));
1665 break;
1666
1667 case ARRAY_TYPE:
1668 TRY (TREE_TYPE (t));
1669 TRY (TYPE_DOMAIN (t));
1670 break;
1671
1672 case INTEGER_TYPE:
1673 TRY (TYPE_MAX_VALUE (t));
1674 break;
1675
1676 case OFFSET_TYPE:
1677 TRY (TREE_TYPE (t));
1678 TRY (TYPE_OFFSET_BASETYPE (t));
1679 break;
1680
1681 case RECORD_TYPE:
1682 if (TYPE_PTRMEMFUNC_P (t))
1683 TRY (TYPE_PTRMEMFUNC_FN_TYPE (t));
1684 break;
1685
1686 /* This list is incomplete, but should suffice for now.
1687 It is very important that `sorry' not call
1688 `report_error_function'. That could cause an infinite loop. */
1689 default:
1690 sorry ("initializer contains unrecognized tree code"); |
1691 return error_mark_node;
1692
|
1693 }
1694
1695 return NULL_TREE;
1696
1697#undef TRY
1698}
1699
1700/* Passed to search_tree. Checks for the use of types with no linkage. */
1701
1702static tree
1703no_linkage_helper (t)
1704 tree t;
1705{
1706 if (TYPE_P (t)
1707 && (IS_AGGR_TYPE (t) || TREE_CODE (t) == ENUMERAL_TYPE)
1708 && (decl_function_context (TYPE_MAIN_DECL (t))
1709 || ANON_AGGRNAME_P (TYPE_IDENTIFIER (t))))
1710 return t;
1711 return NULL_TREE;
1712}
1713
1714/* Check if the type T depends on a type with no linkage and if so, return
1715 it. */
1716
1717tree
1718no_linkage_check (t)
1719 tree t;
1720{
1721 t = search_tree (t, no_linkage_helper);
1722 if (t != error_mark_node)
1723 return t;
1724 return NULL_TREE;
1725}
1726
1727
1728/* Make copies of all the nodes below T. If FUNC is non-NULL, call it
1729 for each node. */
1730
1731tree
1732mapcar (t, func)
1733 tree t;
1734 tree (*func) PROTO((tree));
1735{
1736 tree tmp;
1737
1738 if (t == NULL_TREE)
1739 return t;
1740
1741 if (func)
1742 {
1743 tmp = func (t);
1744 if (tmp)
1745 return tmp;
1746 }
1747
1748 switch (TREE_CODE (t))
1749 {
1750 case ERROR_MARK:
1751 return error_mark_node;
1752 |
1753 case VAR_DECL:
1754 case FUNCTION_DECL:
1755 case CONST_DECL:
1756 /* Rather than aborting, return error_mark_node. This allows us
1757 to report a sensible error message on code like this:
1758
1759 void g() { int i; f<i>(7); }
1760
1761 In a case like:
1762
1763 void g() { const int i = 7; f<i>(7); }
1764
1765 however, we must actually return the constant initializer. */
|
1611 tmp = decl_constant_value (t);
1612 if (tmp != t)
1613 return mapcar (tmp, func);
1614 else
1615 return error_mark_node;
|
1766 if (TREE_READONLY_DECL_P (t))
1767 {
1768 tmp = decl_constant_value (t);
1769 if (tmp != t)
1770 return mapcar (tmp, func);
1771 }
1772 return error_mark_node; |
1773
1774 case PARM_DECL:
1775 {
1776 tree chain = TREE_CHAIN (t);
1777 t = copy_node (t);
1778 TREE_CHAIN (t) = mapcar (chain, func);
1779 TREE_TYPE (t) = mapcar (TREE_TYPE (t), func);
1780 DECL_INITIAL (t) = mapcar (DECL_INITIAL (t), func);
1781 DECL_SIZE (t) = mapcar (DECL_SIZE (t), func);
1782 return t;
1783 }
1784
1785 case TREE_LIST:
1786 {
1787 tree chain = TREE_CHAIN (t);
1788 t = copy_node (t);
1789 TREE_PURPOSE (t) = mapcar (TREE_PURPOSE (t), func);
1790 TREE_VALUE (t) = mapcar (TREE_VALUE (t), func);
1791 TREE_CHAIN (t) = mapcar (chain, func);
1792 return t;
1793 }
1794
1795 case OVERLOAD:
1796 {
1797 tree chain = OVL_CHAIN (t);
1798 t = copy_node (t);
1799 OVL_FUNCTION (t) = mapcar (OVL_FUNCTION (t), func);
1800 OVL_CHAIN (t) = mapcar (chain, func);
1801 return t;
1802 }
1803
1804 case TREE_VEC:
1805 {
1806 int len = TREE_VEC_LENGTH (t);
1807
1808 t = copy_node (t);
1809 while (len--)
1810 TREE_VEC_ELT (t, len) = mapcar (TREE_VEC_ELT (t, len), func);
1811 return t;
1812 }
1813
1814 case INTEGER_CST:
1815 case REAL_CST:
1816 case STRING_CST:
1817 return copy_node (t);
1818
|
1819 case PTRMEM_CST:
1820 t = copy_node (t);
1821 TREE_TYPE (t) = mapcar (TREE_TYPE (t), func);
1822 PTRMEM_CST_MEMBER (t) = mapcar (PTRMEM_CST_MEMBER (t), func);
1823 return t;
1824 |
1825 case COND_EXPR:
1826 case TARGET_EXPR:
1827 case AGGR_INIT_EXPR:
1828 t = copy_node (t);
1829 TREE_OPERAND (t, 0) = mapcar (TREE_OPERAND (t, 0), func);
1830 TREE_OPERAND (t, 1) = mapcar (TREE_OPERAND (t, 1), func);
1831 TREE_OPERAND (t, 2) = mapcar (TREE_OPERAND (t, 2), func);
1832 return t;
1833
1834 case SAVE_EXPR:
1835 t = copy_node (t);
1836 TREE_OPERAND (t, 0) = mapcar (TREE_OPERAND (t, 0), func);
1837 return t;
1838
1839 case MODIFY_EXPR:
1840 case PLUS_EXPR:
1841 case MINUS_EXPR:
1842 case MULT_EXPR:
1843 case TRUNC_DIV_EXPR:
1844 case TRUNC_MOD_EXPR:
1845 case MIN_EXPR:
1846 case MAX_EXPR:
1847 case LSHIFT_EXPR:
1848 case RSHIFT_EXPR:
1849 case BIT_IOR_EXPR:
1850 case BIT_XOR_EXPR:
1851 case BIT_AND_EXPR:
1852 case BIT_ANDTC_EXPR:
1853 case TRUTH_ANDIF_EXPR:
1854 case TRUTH_ORIF_EXPR:
1855 case LT_EXPR:
1856 case LE_EXPR:
1857 case GT_EXPR:
1858 case GE_EXPR:
1859 case EQ_EXPR:
1860 case NE_EXPR:
1861 case CEIL_DIV_EXPR:
1862 case FLOOR_DIV_EXPR:
1863 case ROUND_DIV_EXPR:
1864 case CEIL_MOD_EXPR:
1865 case FLOOR_MOD_EXPR:
1866 case ROUND_MOD_EXPR:
1867 case COMPOUND_EXPR:
1868 case PREDECREMENT_EXPR:
1869 case PREINCREMENT_EXPR:
1870 case POSTDECREMENT_EXPR:
1871 case POSTINCREMENT_EXPR:
1872 case ARRAY_REF:
1873 case SCOPE_REF:
1874 case TRY_CATCH_EXPR:
1875 case WITH_CLEANUP_EXPR:
1876 t = copy_node (t);
1877 TREE_OPERAND (t, 0) = mapcar (TREE_OPERAND (t, 0), func);
1878 TREE_OPERAND (t, 1) = mapcar (TREE_OPERAND (t, 1), func);
1879 return t;
1880
1881 case CALL_EXPR:
1882 t = copy_node (t);
1883 TREE_TYPE (t) = mapcar (TREE_TYPE (t), func);
1884 TREE_OPERAND (t, 0) = mapcar (TREE_OPERAND (t, 0), func);
1885 TREE_OPERAND (t, 1) = mapcar (TREE_OPERAND (t, 1), func);
1886
1887 /* tree.def says that operand two is RTL, but
|
1725 build_call_declarator puts trees in there. */
|
| 1888 make_call_declarator puts trees in there. */ |
1889 if (TREE_OPERAND (t, 2)
1890 && TREE_CODE (TREE_OPERAND (t, 2)) == TREE_LIST)
1891 TREE_OPERAND (t, 2) = mapcar (TREE_OPERAND (t, 2), func);
1892 else
1893 TREE_OPERAND (t, 2) = NULL_TREE;
1894 return t;
1895
1896 case CONVERT_EXPR:
1897 case ADDR_EXPR:
1898 case INDIRECT_REF:
1899 case NEGATE_EXPR:
1900 case BIT_NOT_EXPR:
1901 case TRUTH_NOT_EXPR:
1902 case NOP_EXPR:
1903 case COMPONENT_REF:
1904 case CLEANUP_POINT_EXPR:
|
| 1905 case NON_LVALUE_EXPR: |
1906 t = copy_node (t);
|
| 1907 TREE_TYPE (t) = mapcar (TREE_TYPE (t), func); |
1908 TREE_OPERAND (t, 0) = mapcar (TREE_OPERAND (t, 0), func);
1909 return t;
1910
1911 case POINTER_TYPE:
1912 tmp = build_pointer_type (mapcar (TREE_TYPE (t), func));
|
1748 return cp_build_type_variant (tmp, TYPE_READONLY (t), TYPE_VOLATILE (t));
|
| 1913 return cp_build_qualified_type (tmp, TYPE_QUALS (t)); |
1914 case REFERENCE_TYPE:
1915 tmp = build_reference_type (mapcar (TREE_TYPE (t), func));
|
1751 return cp_build_type_variant (tmp, TYPE_READONLY (t), TYPE_VOLATILE (t));
|
| 1916 return cp_build_qualified_type (tmp, TYPE_QUALS (t)); |
1917 case FUNCTION_TYPE:
1918 tmp = build_function_type (mapcar (TREE_TYPE (t), func),
1919 mapcar (TYPE_ARG_TYPES (t), func));
|
1755 return cp_build_type_variant (tmp, TYPE_READONLY (t), TYPE_VOLATILE (t));
|
| 1920 return cp_build_qualified_type (tmp, TYPE_QUALS (t)); |
1921 case ARRAY_TYPE:
1922 tmp = build_cplus_array_type (mapcar (TREE_TYPE (t), func),
1923 mapcar (TYPE_DOMAIN (t), func));
|
1759 return cp_build_type_variant (tmp, TYPE_READONLY (t), TYPE_VOLATILE (t));
|
| 1924 return cp_build_qualified_type (tmp, CP_TYPE_QUALS (t)); |
1925 case INTEGER_TYPE:
1926 tmp = build_index_type (mapcar (TYPE_MAX_VALUE (t), func));
|
1762 return cp_build_type_variant (tmp, TYPE_READONLY (t), TYPE_VOLATILE (t));
|
| 1927 return cp_build_qualified_type (tmp, TYPE_QUALS (t)); |
1928 case OFFSET_TYPE:
1929 tmp = build_offset_type (mapcar (TYPE_OFFSET_BASETYPE (t), func),
1930 mapcar (TREE_TYPE (t), func));
|
1766 return cp_build_type_variant (tmp, TYPE_READONLY (t), TYPE_VOLATILE (t));
|
| 1931 return cp_build_qualified_type (tmp, TYPE_QUALS (t)); |
1932 case METHOD_TYPE:
1933 tmp = build_cplus_method_type
1934 (mapcar (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (t))), func),
1935 mapcar (TREE_TYPE (t), func),
1936 mapcar (TREE_CHAIN (TYPE_ARG_TYPES (t)), func));
|
1772 return cp_build_type_variant (tmp, TYPE_READONLY (t), TYPE_VOLATILE (t));
|
| 1937 return cp_build_qualified_type (tmp, TYPE_QUALS (t)); |
1938
1939 case COMPLEX_CST:
1940 t = copy_node (t);
1941 TREE_REALPART (t) = mapcar (TREE_REALPART (t), func);
1942 TREE_IMAGPART (t) = mapcar (TREE_REALPART (t), func);
1943 return t;
1944
1945 case CONSTRUCTOR:
1946 t = copy_node (t);
1947 CONSTRUCTOR_ELTS (t) = mapcar (CONSTRUCTOR_ELTS (t), func);
1948 return t;
1949
1950 case TEMPLATE_TEMPLATE_PARM:
1951 return copy_template_template_parm (t);
1952
1953 case BIND_EXPR:
1954 t = copy_node (t);
1955 TREE_OPERAND (t, 0) = mapcar (TREE_OPERAND (t, 0), func);
1956 TREE_OPERAND (t, 1) = mapcar (TREE_OPERAND (t, 1), func);
1957 TREE_OPERAND (t, 2) = NULL_TREE;
1958 return t;
1959
1960 case NEW_EXPR:
1961 t = copy_node (t);
1962 TREE_OPERAND (t, 0) = mapcar (TREE_OPERAND (t, 0), func);
1963 TREE_OPERAND (t, 1) = mapcar (TREE_OPERAND (t, 1), func);
1964 TREE_OPERAND (t, 2) = mapcar (TREE_OPERAND (t, 2), func);
1965 return t;
1966
|
1967 case LOOKUP_EXPR:
1968 t = copy_node (t);
1969 TREE_OPERAND (t, 0) = mapcar (TREE_OPERAND (t, 0), func);
1970 return t;
1971 |
1972 case RECORD_TYPE:
1973 if (TYPE_PTRMEMFUNC_P (t))
1974 return build_ptrmemfunc_type
1975 (mapcar (TYPE_PTRMEMFUNC_FN_TYPE (t), func));
1976 /* else fall through */
1977
1978 /* This list is incomplete, but should suffice for now.
1979 It is very important that `sorry' not call
1980 `report_error_function'. That could cause an infinite loop. */
1981 default:
1982 sorry ("initializer contains unrecognized tree code");
1983 return error_mark_node;
1984
1985 }
1986 my_friendly_abort (107);
1987 /* NOTREACHED */
1988 return NULL_TREE;
1989}
1990
|
1991/* Returns T if T is allocated on the permanent obstack, NULL_TREE
1992 otherwise. */
1993
1994tree
1995permanent_p (t)
1996 tree t;
1997{
1998 return TREE_PERMANENT (t) ? t : NULL_TREE;
1999}
2000 |
2001static tree
2002perm_manip (t)
2003 tree t;
2004{
2005 if (TREE_PERMANENT (t))
2006 return t;
2007
2008 /* Support `void f () { extern int i; A<&i> a; }' */
2009 if ((TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == FUNCTION_DECL)
2010 && TREE_PUBLIC (t))
2011 {
2012 t = copy_node (t);
2013
2014 /* copy_rtx won't make a new SYMBOL_REF, so call make_decl_rtl again. */
2015 DECL_RTL (t) = 0;
2016 make_decl_rtl (t, NULL_PTR, 1);
2017
2018 return t;
2019 }
2020 return NULL_TREE;
2021}
2022
2023/* Assuming T is a node built bottom-up, make it all exist on
2024 permanent obstack, if it is not permanent already. */
2025
2026tree
2027copy_to_permanent (t)
2028 tree t;
2029{
2030 if (t == NULL_TREE || TREE_PERMANENT (t))
2031 return t;
2032
2033 push_obstacks_nochange ();
2034 end_temporary_allocation ();
2035
2036 t = mapcar (t, perm_manip);
2037
2038 pop_obstacks ();
2039
2040 return t;
2041}
2042
2043#ifdef GATHER_STATISTICS
2044extern int depth_reached;
2045#endif
2046
2047void
2048print_lang_statistics ()
2049{
2050 extern struct obstack decl_obstack;
2051 print_obstack_statistics ("class_obstack", &class_obstack);
2052 print_obstack_statistics ("decl_obstack", &decl_obstack);
2053 print_search_statistics ();
2054 print_class_statistics ();
2055#ifdef GATHER_STATISTICS
2056 fprintf (stderr, "maximum template instantiation depth reached: %d\n",
2057 depth_reached);
2058#endif
2059}
2060
2061/* This is used by the `assert' macro. It is provided in libgcc.a,
2062 which `cc' doesn't know how to link. Note that the C++ front-end
2063 no longer actually uses the `assert' macro (instead, it calls
2064 my_friendly_assert). But all of the back-end files still need this. */
2065
2066void
2067__eprintf (string, expression, line, filename)
|
1888#ifdef __STDC__
|
2068 const char *string;
2069 const char *expression;
2070 unsigned line;
2071 const char *filename;
|
1893#else
1894 char *string;
1895 char *expression;
1896 unsigned line;
1897 char *filename;
1898#endif
|
2072{
2073 fprintf (stderr, string, expression, line, filename);
2074 fflush (stderr);
2075 abort ();
2076}
2077
2078/* Return, as an INTEGER_CST node, the number of elements for TYPE
2079 (which is an ARRAY_TYPE). This counts only elements of the top
2080 array. */
2081
2082tree
2083array_type_nelts_top (type)
2084 tree type;
2085{
2086 return fold (build (PLUS_EXPR, sizetype,
2087 array_type_nelts (type),
2088 integer_one_node));
2089}
2090
2091/* Return, as an INTEGER_CST node, the number of elements for TYPE
2092 (which is an ARRAY_TYPE). This one is a recursive count of all
2093 ARRAY_TYPEs that are clumped together. */
2094
2095tree
2096array_type_nelts_total (type)
2097 tree type;
2098{
2099 tree sz = array_type_nelts_top (type);
2100 type = TREE_TYPE (type);
2101 while (TREE_CODE (type) == ARRAY_TYPE)
2102 {
2103 tree n = array_type_nelts_top (type);
2104 sz = fold (build (MULT_EXPR, sizetype, sz, n));
2105 type = TREE_TYPE (type);
2106 }
2107 return sz;
2108}
2109
2110static
2111tree
2112bot_manip (t)
2113 tree t;
2114{
2115 if (TREE_CODE (t) != TREE_LIST && ! TREE_SIDE_EFFECTS (t))
2116 return t;
2117 else if (TREE_CODE (t) == TARGET_EXPR)
2118 {
2119 if (TREE_CODE (TREE_OPERAND (t, 1)) == AGGR_INIT_EXPR)
2120 {
2121 mark_used (TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (t, 1), 0), 0));
2122 return build_cplus_new
2123 (TREE_TYPE (t), break_out_target_exprs (TREE_OPERAND (t, 1)));
2124 }
2125 t = copy_node (t);
2126 TREE_OPERAND (t, 0) = build (VAR_DECL, TREE_TYPE (t));
2127 layout_decl (TREE_OPERAND (t, 0), 0);
2128 return t;
2129 }
2130 else if (TREE_CODE (t) == CALL_EXPR)
2131 mark_used (TREE_OPERAND (TREE_OPERAND (t, 0), 0));
2132
2133 return NULL_TREE;
2134}
2135
2136/* Actually, we'll just clean out the target exprs for the moment. */
2137
2138tree
2139break_out_target_exprs (t)
2140 tree t;
2141{
2142 return mapcar (t, bot_manip);
2143}
2144
2145/* Obstack used for allocating nodes in template function and variable
2146 definitions. */
2147
2148/* Similar to `build_nt', except we build
2149 on the permanent_obstack, regardless. */
2150
2151tree
2152build_min_nt VPROTO((enum tree_code code, ...))
2153{
2154#ifndef __STDC__
2155 enum tree_code code;
2156#endif
2157 register struct obstack *ambient_obstack = expression_obstack;
2158 va_list p;
2159 register tree t;
2160 register int length;
2161 register int i;
2162
2163 VA_START (p, code);
2164
2165#ifndef __STDC__
2166 code = va_arg (p, enum tree_code);
2167#endif
2168
2169 expression_obstack = &permanent_obstack;
2170
2171 t = make_node (code);
2172 length = tree_code_length[(int) code];
2173 TREE_COMPLEXITY (t) = lineno;
2174
2175 for (i = 0; i < length; i++)
2176 {
2177 tree x = va_arg (p, tree);
2178 TREE_OPERAND (t, i) = copy_to_permanent (x);
2179 }
2180
2181 va_end (p);
2182 expression_obstack = ambient_obstack;
2183 return t;
2184}
2185
2186/* Similar to `build', except we build
2187 on the permanent_obstack, regardless. */
2188
2189tree
2190build_min VPROTO((enum tree_code code, tree tt, ...))
2191{
2192#ifndef __STDC__
2193 enum tree_code code;
2194 tree tt;
2195#endif
2196 register struct obstack *ambient_obstack = expression_obstack;
2197 va_list p;
2198 register tree t;
2199 register int length;
2200 register int i;
2201
2202 VA_START (p, tt);
2203
2204#ifndef __STDC__
2205 code = va_arg (p, enum tree_code);
2206 tt = va_arg (p, tree);
2207#endif
2208
2209 expression_obstack = &permanent_obstack;
2210
2211 t = make_node (code);
2212 length = tree_code_length[(int) code];
|
2040 TREE_TYPE (t) = tt;
|
| 2213 TREE_TYPE (t) = copy_to_permanent (tt); |
2214 TREE_COMPLEXITY (t) = lineno;
2215
2216 for (i = 0; i < length; i++)
2217 {
2218 tree x = va_arg (p, tree);
2219 TREE_OPERAND (t, i) = copy_to_permanent (x);
2220 }
2221
2222 va_end (p);
2223 expression_obstack = ambient_obstack;
2224 return t;
2225}
2226
2227/* Same as `tree_cons' but make a permanent object. */
2228
2229tree
2230min_tree_cons (purpose, value, chain)
2231 tree purpose, value, chain;
2232{
2233 register tree node;
2234 register struct obstack *ambient_obstack = current_obstack;
2235 current_obstack = &permanent_obstack;
2236
2237 node = tree_cons (copy_to_permanent (purpose),
2238 copy_to_permanent (value), chain);
2239 current_obstack = ambient_obstack;
2240 return node;
2241}
2242
2243tree
2244get_type_decl (t)
2245 tree t;
2246{
2247 if (TREE_CODE (t) == TYPE_DECL)
2248 return t;
2249 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
2250 return TYPE_STUB_DECL (t);
2251
2252 my_friendly_abort (42);
2253
2254 /* Stop compiler from complaining control reaches end of non-void function. */
2255 return 0;
2256}
2257
2258int
2259can_free (obstack, t)
2260 struct obstack *obstack;
2261 tree t;
2262{
2263 int size = 0;
2264
2265 if (TREE_CODE (t) == TREE_VEC)
2266 size = (TREE_VEC_LENGTH (t)-1) * sizeof (tree) + sizeof (struct tree_vec);
2267 else
2268 my_friendly_abort (42);
2269
2270#define ROUND(x) ((x + obstack_alignment_mask (obstack)) \
2271 & ~ obstack_alignment_mask (obstack))
2272 if ((char *)t + ROUND (size) == obstack_next_free (obstack))
2273 return 1;
2274#undef ROUND
2275
2276 return 0;
2277}
2278
2279/* Return first vector element whose BINFO_TYPE is ELEM.
2280 Return 0 if ELEM is not in VEC. VEC may be NULL_TREE. */
2281
2282tree
2283vec_binfo_member (elem, vec)
2284 tree elem, vec;
2285{
2286 int i;
2287
2288 if (vec)
2289 for (i = 0; i < TREE_VEC_LENGTH (vec); ++i)
|
2117 if (comptypes (elem, BINFO_TYPE (TREE_VEC_ELT (vec, i)), 1))
|
| 2290 if (same_type_p (elem, BINFO_TYPE (TREE_VEC_ELT (vec, i)))) |
2291 return TREE_VEC_ELT (vec, i);
2292
2293 return NULL_TREE;
2294}
2295
2296/* Kludge around the fact that DECL_CONTEXT for virtual functions returns
2297 the wrong thing for decl_function_context. Hopefully the uses in the
2298 backend won't matter, since we don't need a static chain for local class
2299 methods. FIXME! */
2300
2301tree
2302hack_decl_function_context (decl)
2303 tree decl;
2304{
2305 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_FUNCTION_MEMBER_P (decl))
2306 return decl_function_context (TYPE_MAIN_DECL (DECL_CLASS_CONTEXT (decl)));
2307 return decl_function_context (decl);
2308}
2309
|
2310/* Returns the namespace that contains DECL, whether directly or
2311 indirectly. */
2312
2313tree
2314decl_namespace_context (decl)
2315 tree decl;
2316{
2317 while (1)
2318 {
2319 if (TREE_CODE (decl) == NAMESPACE_DECL)
2320 return decl;
2321 else if (TYPE_P (decl))
2322 decl = CP_DECL_CONTEXT (TYPE_MAIN_DECL (decl));
2323 else
2324 decl = CP_DECL_CONTEXT (decl);
2325 }
2326}
2327 |
2328/* Return truthvalue of whether T1 is the same tree structure as T2.
2329 Return 1 if they are the same.
2330 Return 0 if they are understandably different.
2331 Return -1 if either contains tree structure not understood by
2332 this function. */
2333
2334int
2335cp_tree_equal (t1, t2)
2336 tree t1, t2;
2337{
2338 register enum tree_code code1, code2;
2339 int cmp;
2340
2341 if (t1 == t2)
2342 return 1;
2343 if (t1 == 0 || t2 == 0)
2344 return 0;
2345
2346 code1 = TREE_CODE (t1);
2347 code2 = TREE_CODE (t2);
2348
2349 if (code1 == NOP_EXPR || code1 == CONVERT_EXPR || code1 == NON_LVALUE_EXPR)
2350 {
2351 if (code2 == NOP_EXPR || code2 == CONVERT_EXPR || code2 == NON_LVALUE_EXPR)
2352 return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));
2353 else
2354 return cp_tree_equal (TREE_OPERAND (t1, 0), t2);
2355 }
2356 else if (code2 == NOP_EXPR || code2 == CONVERT_EXPR
2357 || code2 == NON_LVALUE_EXPR)
2358 return cp_tree_equal (t1, TREE_OPERAND (t2, 0));
2359
2360 if (code1 != code2)
2361 return 0;
2362
2363 switch (code1)
2364 {
2365 case INTEGER_CST:
2366 return TREE_INT_CST_LOW (t1) == TREE_INT_CST_LOW (t2)
2367 && TREE_INT_CST_HIGH (t1) == TREE_INT_CST_HIGH (t2);
2368
2369 case REAL_CST:
2370 return REAL_VALUES_EQUAL (TREE_REAL_CST (t1), TREE_REAL_CST (t2));
2371
2372 case STRING_CST:
2373 return TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2)
2374 && !bcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2),
2375 TREE_STRING_LENGTH (t1));
2376
2377 case CONSTRUCTOR:
2378 /* We need to do this when determining whether or not two
2379 non-type pointer to member function template arguments
2380 are the same. */
|
2190 if (!(comptypes (TREE_TYPE (t1), TREE_TYPE (t2), 1)
|
| 2381 if (!(same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)) |
2382 /* The first operand is RTL. */
2383 && TREE_OPERAND (t1, 0) == TREE_OPERAND (t2, 0)))
2384 return 0;
2385 return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1));
2386
2387 case TREE_LIST:
2388 cmp = cp_tree_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2));
2389 if (cmp <= 0)
2390 return cmp;
2391 cmp = cp_tree_equal (TREE_VALUE (t1), TREE_VALUE (t2));
2392 if (cmp <= 0)
2393 return cmp;
2394 return cp_tree_equal (TREE_CHAIN (t1), TREE_CHAIN (t2));
2395
2396 case SAVE_EXPR:
2397 return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));
2398
2399 case CALL_EXPR:
2400 cmp = cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));
2401 if (cmp <= 0)
2402 return cmp;
2403 return simple_cst_list_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1));
2404
2405 case TARGET_EXPR:
2406 /* Special case: if either target is an unallocated VAR_DECL,
2407 it means that it's going to be unified with whatever the
2408 TARGET_EXPR is really supposed to initialize, so treat it
2409 as being equivalent to anything. */
2410 if ((TREE_CODE (TREE_OPERAND (t1, 0)) == VAR_DECL
2411 && DECL_NAME (TREE_OPERAND (t1, 0)) == NULL_TREE
2412 && DECL_RTL (TREE_OPERAND (t1, 0)) == 0)
2413 || (TREE_CODE (TREE_OPERAND (t2, 0)) == VAR_DECL
2414 && DECL_NAME (TREE_OPERAND (t2, 0)) == NULL_TREE
2415 && DECL_RTL (TREE_OPERAND (t2, 0)) == 0))
2416 cmp = 1;
2417 else
2418 cmp = cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));
2419 if (cmp <= 0)
2420 return cmp;
2421 return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1));
2422
2423 case WITH_CLEANUP_EXPR:
2424 cmp = cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));
2425 if (cmp <= 0)
2426 return cmp;
2427 return cp_tree_equal (TREE_OPERAND (t1, 2), TREE_OPERAND (t1, 2));
2428
2429 case COMPONENT_REF:
2430 if (TREE_OPERAND (t1, 1) == TREE_OPERAND (t2, 1))
2431 return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));
2432 return 0;
2433
2434 case VAR_DECL:
2435 case PARM_DECL:
2436 case CONST_DECL:
2437 case FUNCTION_DECL:
2438 return 0;
2439
2440 case TEMPLATE_PARM_INDEX:
2441 return TEMPLATE_PARM_IDX (t1) == TEMPLATE_PARM_IDX (t2)
2442 && TEMPLATE_PARM_LEVEL (t1) == TEMPLATE_PARM_LEVEL (t2);
2443
2444 case SIZEOF_EXPR:
2445 case ALIGNOF_EXPR:
2446 if (TREE_CODE (TREE_OPERAND (t1, 0)) != TREE_CODE (TREE_OPERAND (t2, 0)))
2447 return 0;
2448 if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (t1, 0))) == 't')
|
2258 return comptypes (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0), 1);
|
| 2449 return same_type_p (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); |
2450 break;
2451
|
2452 case PTRMEM_CST:
2453 /* Two pointer-to-members are the same if they point to the same
2454 field or function in the same class. */
2455 return (PTRMEM_CST_MEMBER (t1) == PTRMEM_CST_MEMBER (t2)
2456 && same_type_p (PTRMEM_CST_CLASS (t1), PTRMEM_CST_CLASS (t2)));
2457 |
2458 default:
2459 break;
2460 }
2461
2462 switch (TREE_CODE_CLASS (code1))
2463 {
2464 int i;
2465 case '1':
2466 case '2':
2467 case '<':
2468 case 'e':
2469 case 'r':
2470 case 's':
2471 cmp = 1;
2472 for (i=0; i<tree_code_length[(int) code1]; ++i)
2473 {
2474 cmp = cp_tree_equal (TREE_OPERAND (t1, i), TREE_OPERAND (t2, i));
2475 if (cmp <= 0)
2476 return cmp;
2477 }
2478 return cmp;
2479 }
2480
2481 return -1;
2482}
2483
|
2287/* Similar to make_tree_vec, but build on a temporary obstack. */
|
2484/* Similar to make_tree_vec, but build on the momentary_obstack.
2485 Thus, these vectors are really and truly temporary. */ |
2486
2487tree
2488make_temp_vec (len)
2489 int len;
2490{
2491 register tree node;
|
2294 register struct obstack *ambient_obstack = current_obstack;
2295 current_obstack = expression_obstack;
|
| 2492 push_expression_obstack (); |
2493 node = make_tree_vec (len);
|
2297 current_obstack = ambient_obstack;
|
| 2494 pop_obstacks (); |
2495 return node;
2496}
2497
2498/* Build a wrapper around some pointer PTR so we can use it as a tree. */
2499
2500tree
2501build_ptr_wrapper (ptr)
2502 void *ptr;
2503{
2504 tree t = make_node (WRAPPER);
2505 WRAPPER_PTR (t) = ptr;
2506 return t;
2507}
2508
2509/* Same, but on the expression_obstack. */
2510
2511tree
2512build_expr_ptr_wrapper (ptr)
2513 void *ptr;
2514{
2515 tree t;
2516 push_expression_obstack ();
2517 t = build_ptr_wrapper (ptr);
2518 pop_obstacks ();
2519 return t;
2520}
2521
2522/* Build a wrapper around some integer I so we can use it as a tree. */
2523
2524tree
2525build_int_wrapper (i)
2526 int i;
2527{
2528 tree t = make_node (WRAPPER);
2529 WRAPPER_INT (t) = i;
2530 return t;
2531}
2532
|
2336tree
|
| 2533static tree |
2534build_srcloc (file, line)
2535 char *file;
2536 int line;
2537{
2538 tree t;
2539
2540 /* Make sure that we put these on the permanent obstack; up in
2541 add_pending_template, we pass this return value into perm_tree_cons,
2542 which also puts it on the permanent_obstack. However, this wasn't
2543 explicitly doing the same. */
2544 register struct obstack *ambient_obstack = current_obstack;
2545 current_obstack = &permanent_obstack;
2546
2547 t = make_node (SRCLOC);
2548 SRCLOC_FILE (t) = file;
2549 SRCLOC_LINE (t) = line;
2550
2551 current_obstack = ambient_obstack;
2552
2553 return t;
2554}
2555
2556tree
2557build_srcloc_here ()
2558{
2559 return build_srcloc (input_filename, lineno);
2560}
2561
2562void
2563push_expression_obstack ()
2564{
2565 push_obstacks_nochange ();
2566 current_obstack = expression_obstack;
2567}
2568
2569/* The type of ARG when used as an lvalue. */
2570
2571tree
2572lvalue_type (arg)
2573 tree arg;
2574{
2575 tree type = TREE_TYPE (arg);
2576 if (TREE_CODE (arg) == OVERLOAD)
2577 type = unknown_type_node;
|
2381 return cp_build_type_variant
2382 (type, TREE_READONLY (arg), TREE_THIS_VOLATILE (arg));
|
| 2578 return type; |
2579}
2580
2581/* The type of ARG for printing error messages; denote lvalues with
2582 reference types. */
2583
2584tree
2585error_type (arg)
2586 tree arg;
2587{
2588 tree type = TREE_TYPE (arg);
2589 if (TREE_CODE (type) == ARRAY_TYPE)
2590 ;
2591 else if (real_lvalue_p (arg))
2592 type = build_reference_type (lvalue_type (arg));
2593 else if (IS_AGGR_TYPE (type))
2594 type = lvalue_type (arg);
2595
2596 return type;
2597}
2598
2599/* Does FUNCTION use a variable-length argument list? */
2600
2601int
2602varargs_function_p (function)
2603 tree function;
2604{
2605 tree parm = TYPE_ARG_TYPES (TREE_TYPE (function));
2606 for (; parm; parm = TREE_CHAIN (parm))
2607 if (TREE_VALUE (parm) == void_type_node)
2608 return 0;
2609 return 1;
2610}
2611
2612/* Returns 1 if decl is a member of a class. */
2613
2614int
2615member_p (decl)
2616 tree decl;
2617{
2618 tree ctx = DECL_CONTEXT (decl);
2619 return (ctx && TREE_CODE_CLASS (TREE_CODE (ctx)) == 't');
2620}
|
2621
2622/* Create a placeholder for member access where we don't actually have an
2623 object that the access is against. */
2624
2625tree
2626build_dummy_object (type)
2627 tree type;
2628{
2629 tree decl = build1 (NOP_EXPR, build_pointer_type (type), void_zero_node);
2630 return build_indirect_ref (decl, NULL_PTR);
2631}
2632
2633/* We've gotten a reference to a member of TYPE. Return *this if appropriate,
2634 or a dummy object otherwise. If BINFOP is non-0, it is filled with the
2635 binfo path from current_class_type to TYPE, or 0. */
2636
2637tree
2638maybe_dummy_object (type, binfop)
2639 tree type;
2640 tree *binfop;
2641{
2642 tree decl, context;
2643
2644 if (current_class_type
2645 && get_base_distance (type, current_class_type, 0, binfop) != -1)
2646 context = current_class_type;
2647 else
2648 {
2649 /* Reference from a nested class member function. */
2650 context = type;
2651 if (binfop)
2652 *binfop = TYPE_BINFO (type);
2653 }
2654
2655 if (current_class_ref && context == current_class_type)
2656 decl = current_class_ref;
2657 else
2658 decl = build_dummy_object (context);
2659
2660 return decl;
2661}
2662
2663/* Returns 1 if OB is a placeholder object, or a pointer to one. */
2664
2665int
2666is_dummy_object (ob)
2667 tree ob;
2668{
2669 if (TREE_CODE (ob) == INDIRECT_REF)
2670 ob = TREE_OPERAND (ob, 0);
2671 return (TREE_CODE (ob) == NOP_EXPR
2672 && TREE_OPERAND (ob, 0) == void_zero_node);
2673}
2674
2675/* Returns 1 iff type T is a POD type, as defined in [basic.types]. */
2676
2677int
2678pod_type_p (t)
2679 tree t;
2680{
2681 tree f;
2682
2683 while (TREE_CODE (t) == ARRAY_TYPE)
2684 t = TREE_TYPE (t);
2685
2686 if (! IS_AGGR_TYPE (t))
2687 return 1;
2688
2689 if (CLASSTYPE_NON_AGGREGATE (t)
2690 || TYPE_HAS_COMPLEX_ASSIGN_REF (t)
2691 || TYPE_HAS_DESTRUCTOR (t))
2692 return 0;
2693
2694 for (f = TYPE_FIELDS (t); f; f = TREE_CHAIN (f))
2695 {
2696 if (TREE_CODE (f) != FIELD_DECL)
2697 continue;
2698
2699 if (TREE_CODE (TREE_TYPE (f)) == REFERENCE_TYPE
2700 || TYPE_PTRMEMFUNC_P (TREE_TYPE (f))
2701 || TYPE_PTRMEM_P (TREE_TYPE (f)))
2702 return 0;
2703 }
2704
2705 return 1;
2706}
2707
2708/* Return a 1 if ATTR_NAME and ATTR_ARGS denote a valid C++-specific
2709 attribute for either declaration DECL or type TYPE and 0 otherwise.
2710 Plugged into valid_lang_attribute. */
2711
2712int
2713cp_valid_lang_attribute (attr_name, attr_args, decl, type)
2714 tree attr_name;
2715 tree attr_args ATTRIBUTE_UNUSED;
2716 tree decl ATTRIBUTE_UNUSED;
2717 tree type ATTRIBUTE_UNUSED;
2718{
2719 if (is_attribute_p ("com_interface", attr_name))
2720 {
2721 if (! flag_vtable_thunks)
2722 {
2723 error ("`com_interface' only supported with -fvtable-thunks");
2724 return 0;
2725 }
2726
2727 if (attr_args != NULL_TREE
2728 || decl != NULL_TREE
2729 || ! CLASS_TYPE_P (type)
2730 || type != TYPE_MAIN_VARIANT (type))
2731 {
2732 warning ("`com_interface' attribute can only be applied to class definitions");
2733 return 0;
2734 }
2735
2736 CLASSTYPE_COM_INTERFACE (type) = 1;
2737 return 1;
2738 }
2739 else if (is_attribute_p ("init_priority", attr_name))
2740 {
2741 tree initp_expr = (attr_args ? TREE_VALUE (attr_args): NULL_TREE);
2742 int pri;
2743
2744 if (initp_expr)
2745 STRIP_NOPS (initp_expr);
2746
2747 if (!initp_expr || TREE_CODE (initp_expr) != INTEGER_CST)
2748 {
2749 error ("requested init_priority is not an integer constant");
2750 return 0;
2751 }
2752
2753 pri = TREE_INT_CST_LOW (initp_expr);
2754
2755 while (TREE_CODE (type) == ARRAY_TYPE)
2756 type = TREE_TYPE (type);
2757
2758 if (decl == NULL_TREE
2759 || TREE_CODE (decl) != VAR_DECL
2760 || ! TREE_STATIC (decl)
2761 || DECL_EXTERNAL (decl)
2762 || (TREE_CODE (type) != RECORD_TYPE
2763 && TREE_CODE (type) != UNION_TYPE)
2764 /* Static objects in functions are initialized the
2765 first time control passes through that
2766 function. This is not precise enough to pin down an
2767 init_priority value, so don't allow it. */
2768 || current_function_decl)
2769 {
2770 error ("can only use init_priority attribute on file-scope definitions of objects of class type");
2771 return 0;
2772 }
2773
2774 if (pri > MAX_INIT_PRIORITY || pri <= 0)
2775 {
2776 error ("requested init_priority is out of range");
2777 return 0;
2778 }
2779
2780 /* Check for init_priorities that are reserved for
2781 language and runtime support implementations.*/
2782 if (pri <= MAX_RESERVED_INIT_PRIORITY)
2783 {
2784 warning
2785 ("requested init_priority is reserved for internal use");
2786 }
2787
2788 DECL_INIT_PRIORITY (decl) = pri;
2789 return 1;
2790 }
2791
2792 return 0;
2793}
2794
2795/* Return a new PTRMEM_CST of the indicated TYPE. The MEMBER is the
2796 thing pointed to by the constant. */
2797
2798tree
2799make_ptrmem_cst (type, member)
2800 tree type;
2801 tree member;
2802{
2803 tree ptrmem_cst = make_node (PTRMEM_CST);
2804 /* If would seem a great convenience if make_node would set
2805 TREE_CONSTANT for things of class `c', but it does not. */
2806 TREE_CONSTANT (ptrmem_cst) = 1;
2807 TREE_TYPE (ptrmem_cst) = type;
2808 PTRMEM_CST_MEMBER (ptrmem_cst) = member;
2809 return ptrmem_cst;
2810}
2811 |
|