]>
Commit | Line | Data |
---|---|---|
8d08fdba | 1 | /* Handle initialization things in C++. |
59be0cdd | 2 | Copyright (C) 1987, 89, 92, 93, 94, 1995 Free Software Foundation, Inc. |
8d08fdba MS |
3 | Contributed by Michael Tiemann (tiemann@cygnus.com) |
4 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | ||
22 | /* High-level class interface. */ | |
23 | ||
24 | #include "config.h" | |
25 | #include "tree.h" | |
26 | #include "rtl.h" | |
27 | #include "cp-tree.h" | |
28 | #include "flags.h" | |
e8abc66f | 29 | #include "output.h" |
8d08fdba MS |
30 | |
31 | #undef NULL | |
32 | #define NULL 0 | |
33 | ||
34 | /* In C++, structures with well-defined constructors are initialized by | |
35 | those constructors, unasked. CURRENT_BASE_INIT_LIST | |
36 | holds a list of stmts for a BASE_INIT term in the grammar. | |
37 | This list has one element for each base class which must be | |
38 | initialized. The list elements are [basename, init], with | |
39 | type basetype. This allows the possibly anachronistic form | |
40 | (assuming d : a, b, c) "d (int a) : c(a+5), b (a-4), a (a+3)" | |
41 | where each successive term can be handed down the constructor | |
42 | line. Perhaps this was not intended. */ | |
43 | tree current_base_init_list, current_member_init_list; | |
44 | ||
45 | void emit_base_init (); | |
46 | void check_base_init (); | |
47 | static void expand_aggr_vbase_init (); | |
48 | void expand_member_init (); | |
49 | void expand_aggr_init (); | |
50 | ||
51 | static void expand_aggr_init_1 (); | |
52 | static void expand_recursive_init_1 (); | |
53 | static void expand_recursive_init (); | |
7177d104 | 54 | static void expand_virtual_init PROTO((tree, tree)); |
8d08fdba | 55 | tree expand_vec_init (); |
8d08fdba MS |
56 | |
57 | static void add_friend (), add_friends (); | |
58 | ||
59 | /* Cache _builtin_new and _builtin_delete exprs. */ | |
a28e3c7f | 60 | static tree BIN, BID, BIVN, BIVD; |
8d08fdba MS |
61 | |
62 | /* Cache the identifier nodes for the two magic field of a new cookie. */ | |
63 | static tree nc_nelts_field_id; | |
8926095f | 64 | #if 0 |
8d08fdba | 65 | static tree nc_ptr_2comp_field_id; |
8926095f | 66 | #endif |
8d08fdba MS |
67 | |
68 | static tree minus_one; | |
69 | ||
70 | /* Set up local variable for this file. MUST BE CALLED AFTER | |
71 | INIT_DECL_PROCESSING. */ | |
72 | ||
73 | tree BI_header_type, BI_header_size; | |
74 | ||
75 | void init_init_processing () | |
76 | { | |
77 | tree fields[1]; | |
78 | ||
79 | /* Define implicit `operator new' and `operator delete' functions. */ | |
80 | BIN = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) NEW_EXPR]))); | |
81 | TREE_USED (TREE_OPERAND (BIN, 0)) = 0; | |
82 | BID = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) DELETE_EXPR]))); | |
83 | TREE_USED (TREE_OPERAND (BID, 0)) = 0; | |
a28e3c7f MS |
84 | BIVN = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) VEC_NEW_EXPR]))); |
85 | TREE_USED (TREE_OPERAND (BIVN, 0)) = 0; | |
86 | BIVD = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) VEC_DELETE_EXPR]))); | |
87 | TREE_USED (TREE_OPERAND (BIVD, 0)) = 0; | |
8d08fdba MS |
88 | minus_one = build_int_2 (-1, -1); |
89 | ||
90 | /* Define the structure that holds header information for | |
91 | arrays allocated via operator new. */ | |
92 | BI_header_type = make_lang_type (RECORD_TYPE); | |
93 | nc_nelts_field_id = get_identifier ("nelts"); | |
94 | fields[0] = build_lang_field_decl (FIELD_DECL, nc_nelts_field_id, sizetype); | |
95 | finish_builtin_type (BI_header_type, "__new_cookie", fields, | |
96 | 0, double_type_node); | |
97 | BI_header_size = size_in_bytes (BI_header_type); | |
98 | } | |
99 | ||
100 | /* Subroutine of emit_base_init. For BINFO, initialize all the | |
101 | virtual function table pointers, except those that come from | |
102 | virtual base classes. Initialize binfo's vtable pointer, if | |
103 | INIT_SELF is true. CAN_ELIDE is true when we know that all virtual | |
104 | function table pointers in all bases have been initialized already, | |
7177d104 MS |
105 | probably because their constructors have just be run. ADDR is the |
106 | pointer to the object whos vtables we are going to initialize. | |
107 | ||
108 | REAL_BINFO is usually the same as BINFO, except when addr is not of | |
109 | pointer to the type of the real derived type that we want to | |
110 | initialize for. This is the case when addr is a pointer to a sub | |
111 | object of a complete object, and we only want to do part of the | |
112 | complete object's initiailzation of vtable pointers. This is done | |
113 | for all virtual table pointers in virtual base classes. REAL_BINFO | |
114 | is used to find the BINFO_VTABLE that we initialize with. BINFO is | |
115 | used for conversions of addr to subobjects. | |
116 | ||
117 | BINFO_TYPE (real_binfo) must be BINFO_TYPE (binfo). | |
118 | ||
119 | Relies upon binfo being inside TYPE_BINFO (TREE_TYPE (TREE_TYPE | |
120 | (addr))). */ | |
8d08fdba | 121 | void |
7177d104 MS |
122 | expand_direct_vtbls_init (real_binfo, binfo, init_self, can_elide, addr) |
123 | tree real_binfo, binfo, addr; | |
8d08fdba MS |
124 | int init_self, can_elide; |
125 | { | |
7177d104 | 126 | tree real_binfos = BINFO_BASETYPES (real_binfo); |
8d08fdba | 127 | tree binfos = BINFO_BASETYPES (binfo); |
7177d104 | 128 | int i, n_baselinks = real_binfos ? TREE_VEC_LENGTH (real_binfos) : 0; |
8d08fdba MS |
129 | |
130 | for (i = 0; i < n_baselinks; i++) | |
131 | { | |
7177d104 | 132 | tree real_base_binfo = TREE_VEC_ELT (real_binfos, i); |
8d08fdba MS |
133 | tree base_binfo = TREE_VEC_ELT (binfos, i); |
134 | int is_not_base_vtable = | |
7177d104 MS |
135 | i != CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (real_binfo)); |
136 | if (! TREE_VIA_VIRTUAL (real_base_binfo)) | |
44a8d0b3 MS |
137 | expand_direct_vtbls_init (real_base_binfo, base_binfo, |
138 | is_not_base_vtable, can_elide, addr); | |
8d08fdba MS |
139 | } |
140 | #if 0 | |
141 | /* Before turning this on, make sure it is correct. */ | |
43f2999d | 142 | if (can_elide && ! BINFO_MODIFIED (binfo)) |
8d08fdba MS |
143 | return; |
144 | #endif | |
145 | /* Should we use something besides CLASSTYPE_VFIELDS? */ | |
44a8d0b3 | 146 | if (init_self && CLASSTYPE_VFIELDS (BINFO_TYPE (real_binfo))) |
8d08fdba | 147 | { |
7177d104 MS |
148 | tree base_ptr = convert_pointer_to_real (binfo, addr); |
149 | expand_virtual_init (real_binfo, base_ptr); | |
8d08fdba MS |
150 | } |
151 | } | |
152 | \f | |
153 | /* 348 - 351 */ | |
154 | /* Subroutine of emit_base_init. */ | |
155 | static void | |
b7484fbe MS |
156 | perform_member_init (member, name, init, explicit, protect_list) |
157 | tree member, name, init, *protect_list; | |
8d08fdba MS |
158 | int explicit; |
159 | { | |
160 | tree decl; | |
161 | tree type = TREE_TYPE (member); | |
162 | ||
163 | if (TYPE_NEEDS_CONSTRUCTING (type) | |
164 | || (init && TYPE_HAS_CONSTRUCTOR (type))) | |
165 | { | |
166 | /* Since `init' is already a TREE_LIST on the current_member_init_list, | |
167 | only build it into one if we aren't already a list. */ | |
168 | if (init != NULL_TREE && TREE_CODE (init) != TREE_LIST) | |
169 | init = build_tree_list (NULL_TREE, init); | |
170 | ||
171 | decl = build_component_ref (C_C_D, name, 0, explicit); | |
172 | ||
173 | if (explicit | |
174 | && TREE_CODE (type) == ARRAY_TYPE | |
175 | && init != NULL_TREE | |
176 | && TREE_CHAIN (init) == NULL_TREE | |
177 | && TREE_CODE (TREE_TYPE (TREE_VALUE (init))) == ARRAY_TYPE) | |
178 | { | |
179 | /* Initialization of one array from another. */ | |
180 | expand_vec_init (TREE_OPERAND (decl, 1), decl, | |
181 | array_type_nelts (type), TREE_VALUE (init), 1); | |
182 | } | |
183 | else | |
6060a796 | 184 | expand_aggr_init (decl, init, 0, 0); |
8d08fdba MS |
185 | } |
186 | else | |
187 | { | |
188 | if (init == NULL_TREE) | |
189 | { | |
190 | if (explicit) | |
191 | { | |
192 | cp_error ("incomplete initializer for member `%D' of class `%T' which has no constructor", | |
193 | member, current_class_type); | |
194 | init = error_mark_node; | |
195 | } | |
196 | /* member traversal: note it leaves init NULL */ | |
197 | else if (TREE_CODE (TREE_TYPE (member)) == REFERENCE_TYPE) | |
198 | cp_pedwarn ("uninitialized reference member `%D'", member); | |
199 | } | |
200 | else if (TREE_CODE (init) == TREE_LIST) | |
201 | { | |
202 | /* There was an explicit member initialization. Do some | |
203 | work in that case. */ | |
204 | if (TREE_CHAIN (init)) | |
205 | { | |
206 | warning ("initializer list treated as compound expression"); | |
207 | init = build_compound_expr (init); | |
208 | } | |
209 | else | |
210 | init = TREE_VALUE (init); | |
211 | } | |
212 | ||
213 | /* We only build this with a null init if we got it from the | |
214 | current_member_init_list. */ | |
215 | if (init || explicit) | |
216 | { | |
217 | decl = build_component_ref (C_C_D, name, 0, explicit); | |
218 | expand_expr_stmt (build_modify_expr (decl, INIT_EXPR, init)); | |
219 | } | |
220 | } | |
00595019 | 221 | expand_cleanups_to (NULL_TREE); |
b7484fbe MS |
222 | |
223 | if (TYPE_NEEDS_DESTRUCTOR (type)) | |
224 | { | |
225 | tree expr = build_component_ref (C_C_D, name, 0, explicit); | |
226 | expr = build_delete (type, expr, integer_zero_node, | |
227 | LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); | |
228 | ||
229 | if (expr != error_mark_node) | |
230 | { | |
231 | start_protect (); | |
232 | *protect_list = tree_cons (NULL_TREE, expr, *protect_list); | |
233 | } | |
234 | } | |
8d08fdba MS |
235 | } |
236 | ||
b7484fbe MS |
237 | extern int warn_reorder; |
238 | ||
8d08fdba MS |
239 | /* Subroutine of emit_member_init. */ |
240 | static tree | |
241 | sort_member_init (t) | |
242 | tree t; | |
243 | { | |
244 | tree x, member, name, field, init; | |
245 | tree init_list = NULL_TREE; | |
246 | tree fields_to_unmark = NULL_TREE; | |
00595019 MS |
247 | int last_pos = 0; |
248 | tree last_field; | |
8d08fdba MS |
249 | |
250 | for (member = TYPE_FIELDS (t); member ; member = TREE_CHAIN (member)) | |
251 | { | |
00595019 | 252 | int pos; |
b7484fbe MS |
253 | |
254 | /* member could be, for example, a CONST_DECL for an enumerated | |
255 | tag; we don't want to try to initialize that, since it already | |
256 | has a value. */ | |
257 | if (TREE_CODE (member) != FIELD_DECL || !DECL_NAME (member)) | |
258 | continue; | |
259 | ||
00595019 | 260 | for (x = current_member_init_list, pos = 0; x; x = TREE_CHAIN (x), ++pos) |
8d08fdba MS |
261 | { |
262 | /* If we cleared this out, then pay no attention to it. */ | |
263 | if (TREE_PURPOSE (x) == NULL_TREE) | |
264 | continue; | |
265 | name = TREE_PURPOSE (x); | |
266 | ||
267 | #if 0 | |
268 | field = (TREE_CODE (name) == COMPONENT_REF | |
269 | ? TREE_OPERAND (name, 1) : IDENTIFIER_CLASS_VALUE (name)); | |
270 | #else | |
271 | /* Let's find out when this happens. */ | |
272 | my_friendly_assert (TREE_CODE (name) != COMPONENT_REF, 348); | |
273 | field = IDENTIFIER_CLASS_VALUE (name); | |
274 | #endif | |
275 | ||
276 | /* If one member shadows another, get the outermost one. */ | |
277 | if (TREE_CODE (field) == TREE_LIST) | |
278 | field = TREE_VALUE (field); | |
279 | ||
280 | if (field == member) | |
281 | { | |
b7484fbe | 282 | if (warn_reorder) |
00595019 | 283 | { |
b7484fbe | 284 | if (pos < last_pos) |
00595019 MS |
285 | { |
286 | cp_warning_at ("member initializers for `%#D'", last_field); | |
287 | cp_warning_at (" and `%#D'", field); | |
288 | warning (" will be re-ordered to match declaration order"); | |
289 | } | |
290 | last_pos = pos; | |
291 | last_field = field; | |
292 | } | |
8d08fdba | 293 | |
8d08fdba MS |
294 | /* Make sure we won't try to work on this init again. */ |
295 | TREE_PURPOSE (x) = NULL_TREE; | |
b7484fbe MS |
296 | x = build_tree_list (name, TREE_VALUE (x)); |
297 | goto got_it; | |
8d08fdba MS |
298 | } |
299 | } | |
300 | ||
301 | /* If we didn't find MEMBER in the list, create a dummy entry | |
302 | so the two lists (INIT_LIST and the list of members) will be | |
303 | symmetrical. */ | |
b7484fbe MS |
304 | x = build_tree_list (NULL_TREE, NULL_TREE); |
305 | got_it: | |
306 | init_list = chainon (init_list, x); | |
8d08fdba MS |
307 | } |
308 | ||
b7484fbe | 309 | /* Initializers for base members go at the end. */ |
8d08fdba MS |
310 | for (x = current_member_init_list ; x ; x = TREE_CHAIN (x)) |
311 | { | |
b7484fbe MS |
312 | name = TREE_PURPOSE (x); |
313 | if (name) | |
8d08fdba | 314 | { |
b7484fbe | 315 | if (purpose_member (name, init_list)) |
8d08fdba | 316 | { |
b7484fbe MS |
317 | cp_error ("multiple initializations given for member `%D'", |
318 | IDENTIFIER_CLASS_VALUE (name)); | |
319 | continue; | |
8d08fdba | 320 | } |
b7484fbe MS |
321 | |
322 | init_list = chainon (init_list, | |
323 | build_tree_list (name, TREE_VALUE (x))); | |
324 | TREE_PURPOSE (x) = NULL_TREE; | |
325 | } | |
326 | } | |
8d08fdba | 327 | |
b7484fbe MS |
328 | return init_list; |
329 | } | |
8d08fdba | 330 | |
b7484fbe MS |
331 | static void |
332 | sort_base_init (t, rbase_ptr, vbase_ptr) | |
333 | tree t, *rbase_ptr, *vbase_ptr; | |
334 | { | |
335 | tree binfos = BINFO_BASETYPES (TYPE_BINFO (t)); | |
336 | int n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
337 | ||
338 | int i; | |
339 | tree x; | |
340 | tree last; | |
341 | ||
342 | /* For warn_reorder. */ | |
343 | int last_pos = 0; | |
344 | tree last_base = NULL_TREE; | |
345 | ||
346 | tree rbases = NULL_TREE; | |
347 | tree vbases = NULL_TREE; | |
8d08fdba | 348 | |
b7484fbe MS |
349 | /* First walk through and splice out vbase and invalid initializers. |
350 | Also replace names with binfos. */ | |
351 | ||
352 | last = tree_cons (NULL_TREE, NULL_TREE, current_base_init_list); | |
353 | for (x = TREE_CHAIN (last); x; x = TREE_CHAIN (x)) | |
354 | { | |
355 | tree basename = TREE_PURPOSE (x); | |
356 | tree binfo; | |
357 | ||
358 | if (basename == NULL_TREE) | |
359 | { | |
360 | /* Initializer for single base class. Must not | |
361 | use multiple inheritance or this is ambiguous. */ | |
362 | switch (n_baseclasses) | |
8d08fdba | 363 | { |
b7484fbe MS |
364 | case 0: |
365 | cp_error ("`%T' does not have a base class to initialize", | |
366 | current_class_type); | |
367 | return; | |
368 | case 1: | |
369 | break; | |
370 | default: | |
371 | cp_error ("unnamed initializer ambiguous for `%T' which uses multiple inheritance", | |
372 | current_class_type); | |
373 | return; | |
8d08fdba | 374 | } |
b7484fbe MS |
375 | binfo = TREE_VEC_ELT (binfos, 0); |
376 | } | |
377 | else if (is_aggr_typedef (basename, 1)) | |
378 | { | |
379 | binfo = binfo_or_else (IDENTIFIER_TYPE_VALUE (basename), t); | |
380 | if (binfo == NULL_TREE) | |
381 | continue; | |
8d08fdba | 382 | |
b7484fbe MS |
383 | /* Virtual base classes are special cases. Their initializers |
384 | are recorded with this constructor, and they are used when | |
385 | this constructor is the top-level constructor called. */ | |
386 | if (TREE_VIA_VIRTUAL (binfo)) | |
387 | { | |
388 | tree v = CLASSTYPE_VBASECLASSES (t); | |
389 | while (BINFO_TYPE (v) != BINFO_TYPE (binfo)) | |
390 | v = TREE_CHAIN (v); | |
8d08fdba | 391 | |
b7484fbe MS |
392 | vbases = tree_cons (v, TREE_VALUE (x), vbases); |
393 | continue; | |
394 | } | |
395 | else | |
396 | { | |
397 | /* Otherwise, if it is not an immediate base class, complain. */ | |
398 | for (i = n_baseclasses-1; i >= 0; i--) | |
399 | if (BINFO_TYPE (binfo) == BINFO_TYPE (TREE_VEC_ELT (binfos, i))) | |
400 | break; | |
401 | if (i < 0) | |
402 | { | |
403 | cp_error ("`%T' is not an immediate base class of `%T'", | |
404 | IDENTIFIER_TYPE_VALUE (basename), | |
405 | current_class_type); | |
406 | continue; | |
407 | } | |
408 | } | |
8d08fdba | 409 | } |
b7484fbe MS |
410 | else |
411 | my_friendly_abort (365); | |
412 | ||
413 | TREE_PURPOSE (x) = binfo; | |
414 | TREE_CHAIN (last) = x; | |
415 | last = x; | |
8d08fdba | 416 | } |
b7484fbe | 417 | TREE_CHAIN (last) = NULL_TREE; |
8d08fdba | 418 | |
b7484fbe MS |
419 | /* Now walk through our regular bases and make sure they're initialized. */ |
420 | ||
421 | for (i = 0; i < n_baseclasses; ++i) | |
8d08fdba | 422 | { |
b7484fbe MS |
423 | tree base_binfo = TREE_VEC_ELT (binfos, i); |
424 | int pos; | |
425 | ||
426 | if (TREE_VIA_VIRTUAL (base_binfo)) | |
427 | continue; | |
428 | ||
429 | for (x = current_base_init_list, pos = 0; x; x = TREE_CHAIN (x), ++pos) | |
430 | { | |
431 | tree binfo = TREE_PURPOSE (x); | |
432 | ||
433 | if (binfo == NULL_TREE) | |
434 | continue; | |
435 | ||
436 | if (binfo == base_binfo) | |
437 | { | |
438 | if (warn_reorder) | |
439 | { | |
440 | if (pos < last_pos) | |
441 | { | |
442 | cp_warning_at ("base initializers for `%#T'", last_base); | |
443 | cp_warning_at (" and `%#T'", BINFO_TYPE (binfo)); | |
444 | warning (" will be re-ordered to match inheritance order"); | |
445 | } | |
446 | last_pos = pos; | |
447 | last_base = BINFO_TYPE (binfo); | |
448 | } | |
449 | ||
450 | /* Make sure we won't try to work on this init again. */ | |
451 | TREE_PURPOSE (x) = NULL_TREE; | |
452 | x = build_tree_list (binfo, TREE_VALUE (x)); | |
453 | goto got_it; | |
454 | } | |
455 | } | |
456 | ||
457 | /* If we didn't find BASE_BINFO in the list, create a dummy entry | |
458 | so the two lists (RBASES and the list of bases) will be | |
459 | symmetrical. */ | |
460 | x = build_tree_list (NULL_TREE, NULL_TREE); | |
461 | got_it: | |
462 | rbases = chainon (rbases, x); | |
8d08fdba MS |
463 | } |
464 | ||
b7484fbe MS |
465 | *rbase_ptr = rbases; |
466 | *vbase_ptr = vbases; | |
467 | } | |
468 | ||
469 | /* Perform partial cleanups for a base for exception handling. */ | |
470 | static tree | |
471 | build_partial_cleanup_for (binfo) | |
472 | tree binfo; | |
473 | { | |
474 | tree expr = convert_pointer_to_real (binfo, | |
475 | build_unary_op (ADDR_EXPR, C_C_D, 0)); | |
476 | ||
477 | return build_delete (TREE_TYPE (expr), | |
478 | expr, | |
479 | integer_zero_node, | |
480 | LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); | |
8d08fdba MS |
481 | } |
482 | ||
483 | /* Perform whatever initializations have yet to be done on the base | |
484 | class of the class variable. These actions are in the global | |
485 | variable CURRENT_BASE_INIT_LIST. Such an action could be | |
486 | NULL_TREE, meaning that the user has explicitly called the base | |
487 | class constructor with no arguments. | |
488 | ||
489 | If there is a need for a call to a constructor, we must surround | |
490 | that call with a pushlevel/poplevel pair, since we are technically | |
491 | at the PARM level of scope. | |
492 | ||
493 | Argument IMMEDIATELY, if zero, forces a new sequence to be | |
494 | generated to contain these new insns, so it can be emitted later. | |
495 | This sequence is saved in the global variable BASE_INIT_INSNS. | |
496 | Otherwise, the insns are emitted into the current sequence. | |
497 | ||
498 | Note that emit_base_init does *not* initialize virtual base | |
499 | classes. That is done specially, elsewhere. */ | |
500 | ||
501 | void | |
502 | emit_base_init (t, immediately) | |
503 | tree t; | |
504 | int immediately; | |
505 | { | |
506 | extern tree in_charge_identifier; | |
507 | ||
b7484fbe MS |
508 | tree member, x; |
509 | tree mem_init_list; | |
510 | tree rbase_init_list, vbase_init_list; | |
8d08fdba MS |
511 | tree t_binfo = TYPE_BINFO (t); |
512 | tree binfos = BINFO_BASETYPES (t_binfo); | |
513 | int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
b7484fbe MS |
514 | |
515 | my_friendly_assert (protect_list == NULL_TREE, 999); | |
8d08fdba MS |
516 | |
517 | if (! immediately) | |
518 | { | |
519 | do_pending_stack_adjust (); | |
520 | start_sequence (); | |
521 | } | |
522 | ||
523 | if (write_symbols == NO_DEBUG) | |
524 | /* As a matter of principle, `start_sequence' should do this. */ | |
525 | emit_note (0, -1); | |
526 | else | |
527 | /* Always emit a line number note so we can step into constructors. */ | |
528 | emit_line_note_force (DECL_SOURCE_FILE (current_function_decl), | |
529 | DECL_SOURCE_LINE (current_function_decl)); | |
530 | ||
b7484fbe MS |
531 | mem_init_list = sort_member_init (t); |
532 | current_member_init_list = NULL_TREE; | |
8d08fdba | 533 | |
b7484fbe MS |
534 | sort_base_init (t, &rbase_init_list, &vbase_init_list); |
535 | current_base_init_list = NULL_TREE; | |
8d08fdba | 536 | |
b7484fbe MS |
537 | if (TYPE_USES_VIRTUAL_BASECLASSES (t)) |
538 | { | |
539 | tree first_arg = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); | |
8d08fdba | 540 | |
b7484fbe MS |
541 | expand_start_cond (first_arg, 0); |
542 | expand_aggr_vbase_init (t_binfo, C_C_D, current_class_decl, | |
543 | vbase_init_list); | |
544 | expand_end_cond (); | |
8d08fdba | 545 | } |
8d08fdba | 546 | |
b7484fbe | 547 | /* Now, perform initialization of non-virtual base classes. */ |
8d08fdba MS |
548 | for (i = 0; i < n_baseclasses; i++) |
549 | { | |
550 | tree base = current_class_decl; | |
551 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
b7484fbe MS |
552 | tree init = void_list_node; |
553 | ||
554 | if (TREE_VIA_VIRTUAL (base_binfo)) | |
555 | continue; | |
8d08fdba | 556 | |
8ccc31eb MS |
557 | #if 0 /* Once unsharing happens soon enough. */ |
558 | my_friendly_assert (BINFO_INHERITANCE_CHAIN (base_binfo) == t_binfo); | |
559 | #else | |
560 | BINFO_INHERITANCE_CHAIN (base_binfo) = t_binfo; | |
561 | #endif | |
562 | ||
b7484fbe MS |
563 | if (TREE_PURPOSE (rbase_init_list)) |
564 | init = TREE_VALUE (rbase_init_list); | |
565 | else if (TYPE_NEEDS_CONSTRUCTING (BINFO_TYPE (base_binfo))) | |
566 | init = NULL_TREE; | |
8d08fdba | 567 | |
b7484fbe MS |
568 | if (init != void_list_node) |
569 | { | |
28cbf42c | 570 | member = convert_pointer_to_real (base_binfo, current_class_decl); |
b7484fbe MS |
571 | expand_aggr_init_1 (base_binfo, 0, |
572 | build_indirect_ref (member, NULL_PTR), init, | |
573 | BINFO_OFFSET_ZEROP (base_binfo), LOOKUP_NORMAL); | |
574 | expand_cleanups_to (NULL_TREE); | |
8d08fdba | 575 | } |
8d08fdba | 576 | |
b7484fbe | 577 | if (TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo))) |
8d08fdba | 578 | { |
b7484fbe MS |
579 | start_protect (); |
580 | protect_list = tree_cons (NULL_TREE, | |
581 | build_partial_cleanup_for (base_binfo), | |
582 | protect_list); | |
8d08fdba | 583 | } |
b7484fbe MS |
584 | |
585 | rbase_init_list = TREE_CHAIN (rbase_init_list); | |
8d08fdba MS |
586 | } |
587 | ||
588 | /* Initialize all the virtual function table fields that | |
589 | do come from virtual base classes. */ | |
590 | if (TYPE_USES_VIRTUAL_BASECLASSES (t)) | |
7177d104 | 591 | expand_indirect_vtbls_init (t_binfo, C_C_D, current_class_decl, 0); |
8d08fdba MS |
592 | |
593 | /* Initialize all the virtual function table fields that | |
594 | do not come from virtual base classes. */ | |
7177d104 | 595 | expand_direct_vtbls_init (t_binfo, t_binfo, 1, 1, current_class_decl); |
8d08fdba | 596 | |
8d08fdba MS |
597 | for (member = TYPE_FIELDS (t); member; member = TREE_CHAIN (member)) |
598 | { | |
599 | tree init, name; | |
b7484fbe MS |
600 | int from_init_list; |
601 | ||
602 | /* member could be, for example, a CONST_DECL for an enumerated | |
603 | tag; we don't want to try to initialize that, since it already | |
604 | has a value. */ | |
605 | if (TREE_CODE (member) != FIELD_DECL || !DECL_NAME (member)) | |
606 | continue; | |
8d08fdba MS |
607 | |
608 | /* See if we had a user-specified member initialization. */ | |
b7484fbe | 609 | if (TREE_PURPOSE (mem_init_list)) |
8d08fdba | 610 | { |
b7484fbe MS |
611 | name = TREE_PURPOSE (mem_init_list); |
612 | init = TREE_VALUE (mem_init_list); | |
613 | from_init_list = 1; | |
8d08fdba | 614 | |
b7484fbe MS |
615 | /* Also see if it's ever a COMPONENT_REF here. If it is, we |
616 | need to do `expand_assignment (name, init, 0, 0);' and | |
617 | a continue. */ | |
618 | my_friendly_assert (TREE_CODE (name) != COMPONENT_REF, 349); | |
8d08fdba | 619 | } |
b7484fbe | 620 | else |
8d08fdba | 621 | { |
8d08fdba MS |
622 | name = DECL_NAME (member); |
623 | init = DECL_INITIAL (member); | |
b7484fbe MS |
624 | |
625 | from_init_list = 0; | |
8d08fdba MS |
626 | } |
627 | ||
b7484fbe MS |
628 | perform_member_init (member, name, init, from_init_list, &protect_list); |
629 | mem_init_list = TREE_CHAIN (mem_init_list); | |
8d08fdba MS |
630 | } |
631 | ||
b7484fbe MS |
632 | /* Now initialize any members from our bases. */ |
633 | while (mem_init_list) | |
634 | { | |
635 | tree name, init, field; | |
636 | ||
637 | if (TREE_PURPOSE (mem_init_list)) | |
638 | { | |
639 | name = TREE_PURPOSE (mem_init_list); | |
640 | init = TREE_VALUE (mem_init_list); | |
641 | /* XXX: this may need the COMPONENT_REF operand 0 check if | |
642 | it turns out we actually get them. */ | |
643 | field = IDENTIFIER_CLASS_VALUE (name); | |
644 | ||
645 | /* If one member shadows another, get the outermost one. */ | |
646 | if (TREE_CODE (field) == TREE_LIST) | |
647 | { | |
648 | field = TREE_VALUE (field); | |
649 | if (decl_type_context (field) != current_class_type) | |
650 | cp_error ("field `%D' not in immediate context", field); | |
651 | } | |
652 | ||
653 | #if 0 | |
654 | /* It turns out if you have an anonymous union in the | |
655 | class, a member from it can end up not being on the | |
656 | list of fields (rather, the type is), and therefore | |
657 | won't be seen by the for loop above. */ | |
658 | ||
659 | /* The code in this for loop is derived from a general loop | |
660 | which had this check in it. Theoretically, we've hit | |
661 | every initialization for the list of members in T, so | |
662 | we shouldn't have anything but these left in this list. */ | |
663 | my_friendly_assert (DECL_FIELD_CONTEXT (field) != t, 351); | |
664 | #endif | |
665 | ||
666 | perform_member_init (field, name, init, 1, &protect_list); | |
667 | } | |
668 | mem_init_list = TREE_CHAIN (mem_init_list); | |
669 | } | |
8d08fdba | 670 | |
8d08fdba MS |
671 | if (! immediately) |
672 | { | |
673 | extern rtx base_init_insns; | |
674 | ||
675 | do_pending_stack_adjust (); | |
676 | my_friendly_assert (base_init_insns == 0, 207); | |
677 | base_init_insns = get_insns (); | |
678 | end_sequence (); | |
679 | } | |
680 | ||
681 | /* All the implicit try blocks we built up will be zapped | |
682 | when we come to a real binding contour boundary. */ | |
683 | } | |
684 | ||
685 | /* Check that all fields are properly initialized after | |
686 | an assignment to `this'. */ | |
687 | void | |
688 | check_base_init (t) | |
689 | tree t; | |
690 | { | |
691 | tree member; | |
692 | for (member = TYPE_FIELDS (t); member; member = TREE_CHAIN (member)) | |
693 | if (DECL_NAME (member) && TREE_USED (member)) | |
694 | cp_error ("field `%D' used before initialized (after assignment to `this')", | |
695 | member); | |
696 | } | |
697 | ||
698 | /* This code sets up the virtual function tables appropriate for | |
699 | the pointer DECL. It is a one-ply initialization. | |
700 | ||
701 | BINFO is the exact type that DECL is supposed to be. In | |
702 | multiple inheritance, this might mean "C's A" if C : A, B. */ | |
8926095f | 703 | static void |
7177d104 MS |
704 | expand_virtual_init (binfo, decl) |
705 | tree binfo, decl; | |
8d08fdba | 706 | { |
7177d104 | 707 | tree type = BINFO_TYPE (binfo); |
8d08fdba MS |
708 | tree vtbl, vtbl_ptr; |
709 | tree vtype, vtype_binfo; | |
710 | ||
7177d104 MS |
711 | /* This code is crusty. Should be simple, like: |
712 | vtbl = BINFO_VTABLE (binfo); | |
713 | */ | |
8d08fdba MS |
714 | vtype = DECL_CONTEXT (CLASSTYPE_VFIELD (type)); |
715 | vtype_binfo = get_binfo (vtype, TREE_TYPE (TREE_TYPE (decl)), 0); | |
7177d104 | 716 | vtbl = BINFO_VTABLE (binfo_value (DECL_FIELD_CONTEXT (CLASSTYPE_VFIELD (type)), binfo)); |
e3417fcd | 717 | assemble_external (vtbl); |
7177d104 MS |
718 | TREE_USED (vtbl) = 1; |
719 | vtbl = build1 (ADDR_EXPR, TYPE_POINTER_TO (TREE_TYPE (vtbl)), vtbl); | |
8d08fdba MS |
720 | decl = convert_pointer_to_real (vtype_binfo, decl); |
721 | vtbl_ptr = build_vfield_ref (build_indirect_ref (decl, NULL_PTR), vtype); | |
722 | if (vtbl_ptr == error_mark_node) | |
8926095f | 723 | return; |
8d08fdba MS |
724 | |
725 | /* Have to convert VTBL since array sizes may be different. */ | |
6060a796 | 726 | vtbl = convert_force (TREE_TYPE (vtbl_ptr), vtbl, 0); |
7177d104 | 727 | expand_expr_stmt (build_modify_expr (vtbl_ptr, NOP_EXPR, vtbl)); |
8d08fdba MS |
728 | } |
729 | ||
730 | /* Subroutine of `expand_aggr_vbase_init'. | |
731 | BINFO is the binfo of the type that is being initialized. | |
732 | INIT_LIST is the list of initializers for the virtual baseclass. */ | |
733 | static void | |
734 | expand_aggr_vbase_init_1 (binfo, exp, addr, init_list) | |
735 | tree binfo, exp, addr, init_list; | |
736 | { | |
b7484fbe | 737 | tree init = purpose_member (binfo, init_list); |
8d08fdba MS |
738 | tree ref = build_indirect_ref (addr, NULL_PTR); |
739 | if (init) | |
b7484fbe | 740 | init = TREE_VALUE (init); |
8d08fdba | 741 | /* Call constructors, but don't set up vtables. */ |
db5ae43f | 742 | expand_aggr_init_1 (binfo, exp, ref, init, 0, LOOKUP_COMPLAIN); |
00595019 | 743 | expand_cleanups_to (NULL_TREE); |
8d08fdba MS |
744 | } |
745 | ||
746 | /* Initialize this object's virtual base class pointers. This must be | |
747 | done only at the top-level of the object being constructed. | |
748 | ||
749 | INIT_LIST is list of initialization for constructor to perform. */ | |
750 | static void | |
751 | expand_aggr_vbase_init (binfo, exp, addr, init_list) | |
752 | tree binfo; | |
753 | tree exp; | |
754 | tree addr; | |
755 | tree init_list; | |
756 | { | |
757 | tree type = BINFO_TYPE (binfo); | |
758 | ||
759 | if (TYPE_USES_VIRTUAL_BASECLASSES (type)) | |
760 | { | |
761 | tree result = init_vbase_pointers (type, addr); | |
762 | tree vbases; | |
763 | ||
764 | if (result) | |
765 | expand_expr_stmt (build_compound_expr (result)); | |
766 | ||
b7484fbe MS |
767 | for (vbases = CLASSTYPE_VBASECLASSES (type); vbases; |
768 | vbases = TREE_CHAIN (vbases)) | |
769 | { | |
770 | tree tmp = purpose_member (vbases, result); | |
771 | expand_aggr_vbase_init_1 (vbases, exp, | |
772 | TREE_OPERAND (TREE_VALUE (tmp), 0), | |
773 | init_list); | |
774 | } | |
8d08fdba MS |
775 | } |
776 | } | |
777 | ||
778 | /* Subroutine to perform parser actions for member initialization. | |
779 | S_ID is the scoped identifier. | |
780 | NAME is the name of the member. | |
781 | INIT is the initializer, or `void_type_node' if none. */ | |
782 | void | |
783 | do_member_init (s_id, name, init) | |
784 | tree s_id, name, init; | |
785 | { | |
786 | tree binfo, base; | |
787 | ||
788 | if (current_class_type == NULL_TREE | |
789 | || ! is_aggr_typedef (s_id, 1)) | |
790 | return; | |
791 | binfo = get_binfo (IDENTIFIER_TYPE_VALUE (s_id), | |
792 | current_class_type, 1); | |
793 | if (binfo == error_mark_node) | |
794 | return; | |
795 | if (binfo == 0) | |
796 | { | |
797 | error_not_base_type (IDENTIFIER_TYPE_VALUE (s_id), current_class_type); | |
798 | return; | |
799 | } | |
800 | ||
801 | base = convert_pointer_to (binfo, current_class_decl); | |
802 | expand_member_init (build_indirect_ref (base, NULL_PTR), name, init); | |
803 | } | |
804 | ||
805 | /* Function to give error message if member initialization specification | |
806 | is erroneous. FIELD is the member we decided to initialize. | |
807 | TYPE is the type for which the initialization is being performed. | |
808 | FIELD must be a member of TYPE, or the base type from which FIELD | |
809 | comes must not need a constructor. | |
810 | ||
811 | MEMBER_NAME is the name of the member. */ | |
812 | ||
813 | static int | |
814 | member_init_ok_or_else (field, type, member_name) | |
815 | tree field; | |
816 | tree type; | |
817 | char *member_name; | |
818 | { | |
819 | if (field == error_mark_node) | |
820 | return 0; | |
821 | if (field == NULL_TREE) | |
822 | { | |
823 | cp_error ("class `%T' does not have any field named `%s'", type, | |
b7484fbe | 824 | member_name); |
8d08fdba MS |
825 | return 0; |
826 | } | |
827 | if (DECL_CONTEXT (field) != type | |
828 | && TYPE_NEEDS_CONSTRUCTING (DECL_CONTEXT (field))) | |
829 | { | |
830 | cp_error ("member `%D' comes from base class needing constructor", | |
831 | field); | |
832 | return 0; | |
833 | } | |
b7484fbe MS |
834 | if (TREE_STATIC (field)) |
835 | { | |
836 | cp_error ("field `%#D' is static; only point of initialization is its declaration", | |
837 | field); | |
838 | return 0; | |
839 | } | |
840 | ||
8d08fdba MS |
841 | return 1; |
842 | } | |
843 | ||
844 | /* If NAME is a viable field name for the aggregate DECL, | |
845 | and PARMS is a viable parameter list, then expand an _EXPR | |
846 | which describes this initialization. | |
847 | ||
848 | Note that we do not need to chase through the class's base classes | |
849 | to look for NAME, because if it's in that list, it will be handled | |
850 | by the constructor for that base class. | |
851 | ||
852 | We do not yet have a fixed-point finder to instantiate types | |
853 | being fed to overloaded constructors. If there is a unique | |
854 | constructor, then argument types can be got from that one. | |
855 | ||
856 | If INIT is non-NULL, then it the initialization should | |
857 | be placed in `current_base_init_list', where it will be processed | |
858 | by `emit_base_init'. */ | |
859 | void | |
860 | expand_member_init (exp, name, init) | |
861 | tree exp, name, init; | |
862 | { | |
863 | extern tree ptr_type_node; /* should be in tree.h */ | |
864 | ||
865 | tree basetype = NULL_TREE, field; | |
866 | tree parm; | |
867 | tree rval, type; | |
868 | tree actual_name; | |
869 | ||
870 | if (exp == NULL_TREE) | |
871 | return; /* complain about this later */ | |
872 | ||
873 | type = TYPE_MAIN_VARIANT (TREE_TYPE (exp)); | |
874 | ||
875 | if (name == NULL_TREE && IS_AGGR_TYPE (type)) | |
876 | switch (CLASSTYPE_N_BASECLASSES (type)) | |
877 | { | |
878 | case 0: | |
879 | error ("base class initializer specified, but no base class to initialize"); | |
880 | return; | |
881 | case 1: | |
882 | basetype = TYPE_BINFO_BASETYPE (type, 0); | |
883 | break; | |
884 | default: | |
885 | error ("initializer for unnamed base class ambiguous"); | |
886 | cp_error ("(type `%T' uses multiple inheritance)", type); | |
887 | return; | |
888 | } | |
889 | ||
890 | if (init) | |
891 | { | |
892 | /* The grammar should not allow fields which have names | |
893 | that are TYPENAMEs. Therefore, if the field has | |
894 | a non-NULL TREE_TYPE, we may assume that this is an | |
895 | attempt to initialize a base class member of the current | |
896 | type. Otherwise, it is an attempt to initialize a | |
897 | member field. */ | |
898 | ||
899 | if (init == void_type_node) | |
900 | init = NULL_TREE; | |
901 | ||
902 | if (name == NULL_TREE || IDENTIFIER_HAS_TYPE_VALUE (name)) | |
903 | { | |
904 | tree base_init; | |
905 | ||
906 | if (name == NULL_TREE) | |
907 | { | |
908 | /* | |
909 | if (basetype) | |
910 | name = TYPE_IDENTIFIER (basetype); | |
911 | else | |
912 | { | |
913 | error ("no base class to initialize"); | |
914 | return; | |
915 | } | |
916 | */ | |
917 | } | |
918 | else | |
919 | { | |
920 | basetype = IDENTIFIER_TYPE_VALUE (name); | |
921 | if (basetype != type | |
922 | && ! binfo_member (basetype, TYPE_BINFO (type)) | |
923 | && ! binfo_member (basetype, CLASSTYPE_VBASECLASSES (type))) | |
924 | { | |
925 | if (IDENTIFIER_CLASS_VALUE (name)) | |
926 | goto try_member; | |
927 | if (TYPE_USES_VIRTUAL_BASECLASSES (type)) | |
928 | error ("type `%s' is not an immediate or virtual basetype for `%s'", | |
929 | IDENTIFIER_POINTER (name), | |
930 | TYPE_NAME_STRING (type)); | |
931 | else | |
932 | error ("type `%s' is not an immediate basetype for `%s'", | |
933 | IDENTIFIER_POINTER (name), | |
934 | TYPE_NAME_STRING (type)); | |
935 | return; | |
936 | } | |
937 | } | |
938 | ||
939 | if (purpose_member (name, current_base_init_list)) | |
940 | { | |
941 | error ("base class `%s' already initialized", | |
942 | IDENTIFIER_POINTER (name)); | |
943 | return; | |
944 | } | |
945 | ||
946 | base_init = build_tree_list (name, init); | |
947 | TREE_TYPE (base_init) = basetype; | |
948 | current_base_init_list = chainon (current_base_init_list, base_init); | |
949 | } | |
950 | else | |
951 | { | |
952 | tree member_init; | |
953 | ||
954 | try_member: | |
955 | field = lookup_field (type, name, 1, 0); | |
956 | ||
957 | if (! member_init_ok_or_else (field, type, IDENTIFIER_POINTER (name))) | |
958 | return; | |
959 | ||
960 | if (purpose_member (name, current_member_init_list)) | |
961 | { | |
962 | error ("field `%s' already initialized", IDENTIFIER_POINTER (name)); | |
963 | return; | |
964 | } | |
965 | ||
966 | member_init = build_tree_list (name, init); | |
967 | TREE_TYPE (member_init) = TREE_TYPE (field); | |
968 | current_member_init_list = chainon (current_member_init_list, member_init); | |
969 | } | |
970 | return; | |
971 | } | |
972 | else if (name == NULL_TREE) | |
973 | { | |
974 | compiler_error ("expand_member_init: name == NULL_TREE"); | |
975 | return; | |
976 | } | |
977 | ||
978 | basetype = type; | |
979 | field = lookup_field (basetype, name, 0, 0); | |
980 | ||
981 | if (! member_init_ok_or_else (field, basetype, IDENTIFIER_POINTER (name))) | |
982 | return; | |
983 | ||
984 | /* now see if there is a constructor for this type | |
985 | which will take these args. */ | |
986 | ||
987 | if (TYPE_HAS_CONSTRUCTOR (TREE_TYPE (field))) | |
988 | { | |
989 | tree parmtypes, fndecl; | |
990 | ||
991 | if (TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == PARM_DECL) | |
992 | { | |
993 | /* just know that we've seen something for this node */ | |
994 | DECL_INITIAL (exp) = error_mark_node; | |
995 | TREE_USED (exp) = 1; | |
996 | } | |
997 | type = TYPE_MAIN_VARIANT (TREE_TYPE (field)); | |
998 | actual_name = TYPE_IDENTIFIER (type); | |
999 | parm = build_component_ref (exp, name, 0, 0); | |
1000 | ||
1001 | /* Now get to the constructor. */ | |
1002 | fndecl = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), 0); | |
1003 | /* Get past destructor, if any. */ | |
1004 | if (TYPE_HAS_DESTRUCTOR (type)) | |
1005 | fndecl = DECL_CHAIN (fndecl); | |
1006 | ||
1007 | if (fndecl) | |
1008 | my_friendly_assert (TREE_CODE (fndecl) == FUNCTION_DECL, 209); | |
1009 | ||
1010 | /* If the field is unique, we can use the parameter | |
1011 | types to guide possible type instantiation. */ | |
1012 | if (DECL_CHAIN (fndecl) == NULL_TREE) | |
1013 | { | |
1014 | /* There was a confusion here between | |
1015 | FIELD and FNDECL. The following code | |
1016 | should be correct, but abort is here | |
1017 | to make sure. */ | |
1018 | my_friendly_abort (48); | |
1019 | parmtypes = FUNCTION_ARG_CHAIN (fndecl); | |
1020 | } | |
1021 | else | |
1022 | { | |
1023 | parmtypes = NULL_TREE; | |
1024 | fndecl = NULL_TREE; | |
1025 | } | |
1026 | ||
1027 | init = convert_arguments (parm, parmtypes, NULL_TREE, fndecl, LOOKUP_NORMAL); | |
1028 | if (init == NULL_TREE || TREE_TYPE (init) != error_mark_node) | |
1029 | rval = build_method_call (NULL_TREE, actual_name, init, NULL_TREE, LOOKUP_NORMAL); | |
1030 | else | |
1031 | return; | |
1032 | ||
1033 | if (rval != error_mark_node) | |
1034 | { | |
1035 | /* Now, fill in the first parm with our guy */ | |
1036 | TREE_VALUE (TREE_OPERAND (rval, 1)) | |
1037 | = build_unary_op (ADDR_EXPR, parm, 0); | |
1038 | TREE_TYPE (rval) = ptr_type_node; | |
1039 | TREE_SIDE_EFFECTS (rval) = 1; | |
1040 | } | |
1041 | } | |
1042 | else if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (field))) | |
1043 | { | |
1044 | parm = build_component_ref (exp, name, 0, 0); | |
6060a796 | 1045 | expand_aggr_init (parm, NULL_TREE, 0, 0); |
8d08fdba MS |
1046 | rval = error_mark_node; |
1047 | } | |
1048 | ||
1049 | /* Now initialize the member. It does not have to | |
1050 | be of aggregate type to receive initialization. */ | |
1051 | if (rval != error_mark_node) | |
1052 | expand_expr_stmt (rval); | |
1053 | } | |
1054 | ||
1055 | /* This is like `expand_member_init', only it stores one aggregate | |
1056 | value into another. | |
1057 | ||
1058 | INIT comes in two flavors: it is either a value which | |
1059 | is to be stored in EXP, or it is a parameter list | |
1060 | to go to a constructor, which will operate on EXP. | |
6060a796 MS |
1061 | If FLAGS is LOOKUP_ONLYCONVERTING then it is the = init form of |
1062 | the initializer, if FLAGS is 0, then it is the (init) form. | |
8d08fdba | 1063 | If `init' is a CONSTRUCTOR, then we emit a warning message, |
59be0cdd | 1064 | explaining that such initializations are invalid. |
8d08fdba MS |
1065 | |
1066 | ALIAS_THIS is nonzero iff we are initializing something which is | |
1067 | essentially an alias for C_C_D. In this case, the base constructor | |
1068 | may move it on us, and we must keep track of such deviations. | |
1069 | ||
1070 | If INIT resolves to a CALL_EXPR which happens to return | |
1071 | something of the type we are looking for, then we know | |
1072 | that we can safely use that call to perform the | |
1073 | initialization. | |
1074 | ||
1075 | The virtual function table pointer cannot be set up here, because | |
1076 | we do not really know its type. | |
1077 | ||
1078 | Virtual baseclass pointers are also set up here. | |
1079 | ||
1080 | This never calls operator=(). | |
1081 | ||
1082 | When initializing, nothing is CONST. | |
1083 | ||
1084 | A default copy constructor may have to be used to perform the | |
1085 | initialization. | |
1086 | ||
1087 | A constructor or a conversion operator may have to be used to | |
1088 | perform the initialization, but not both, as it would be ambiguous. | |
1089 | */ | |
1090 | ||
1091 | void | |
6060a796 | 1092 | expand_aggr_init (exp, init, alias_this, flags) |
8d08fdba MS |
1093 | tree exp, init; |
1094 | int alias_this; | |
6060a796 | 1095 | int flags; |
8d08fdba MS |
1096 | { |
1097 | tree type = TREE_TYPE (exp); | |
1098 | int was_const = TREE_READONLY (exp); | |
1099 | ||
1100 | if (init == error_mark_node) | |
1101 | return; | |
1102 | ||
1103 | TREE_READONLY (exp) = 0; | |
1104 | ||
1105 | if (TREE_CODE (type) == ARRAY_TYPE) | |
1106 | { | |
1107 | /* Must arrange to initialize each element of EXP | |
1108 | from elements of INIT. */ | |
1109 | int was_const_elts = TYPE_READONLY (TREE_TYPE (type)); | |
1110 | tree itype = init ? TREE_TYPE (init) : NULL_TREE; | |
1111 | if (was_const_elts) | |
f376e137 MS |
1112 | { |
1113 | TREE_TYPE (exp) = TYPE_MAIN_VARIANT (type); | |
1114 | if (init) | |
1115 | TREE_TYPE (init) = TYPE_MAIN_VARIANT (itype); | |
1116 | } | |
8d08fdba MS |
1117 | if (init && TREE_TYPE (init) == NULL_TREE) |
1118 | { | |
1119 | /* Handle bad initializers like: | |
1120 | class COMPLEX { | |
1121 | public: | |
1122 | double re, im; | |
1123 | COMPLEX(double r = 0.0, double i = 0.0) {re = r; im = i;}; | |
1124 | ~COMPLEX() {}; | |
1125 | }; | |
1126 | ||
1127 | int main(int argc, char **argv) { | |
1128 | COMPLEX zees(1.0, 0.0)[10]; | |
1129 | } | |
1130 | */ | |
1131 | error ("bad array initializer"); | |
1132 | return; | |
1133 | } | |
1134 | expand_vec_init (exp, exp, array_type_nelts (type), init, | |
1135 | init && comptypes (TREE_TYPE (init), TREE_TYPE (exp), 1)); | |
1136 | TREE_READONLY (exp) = was_const; | |
1137 | TREE_TYPE (exp) = type; | |
f376e137 MS |
1138 | if (init) |
1139 | TREE_TYPE (init) = itype; | |
8d08fdba MS |
1140 | return; |
1141 | } | |
1142 | ||
1143 | if (TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == PARM_DECL) | |
1144 | /* just know that we've seen something for this node */ | |
1145 | TREE_USED (exp) = 1; | |
1146 | ||
1147 | #if 0 | |
1148 | /* If initializing from a GNU C CONSTRUCTOR, consider the elts in the | |
1149 | constructor as parameters to an implicit GNU C++ constructor. */ | |
1150 | if (init && TREE_CODE (init) == CONSTRUCTOR | |
1151 | && TYPE_HAS_CONSTRUCTOR (type) | |
1152 | && TREE_TYPE (init) == type) | |
1153 | init = CONSTRUCTOR_ELTS (init); | |
1154 | #endif | |
1155 | expand_aggr_init_1 (TYPE_BINFO (type), exp, exp, | |
6060a796 | 1156 | init, alias_this, LOOKUP_NORMAL|flags); |
8d08fdba MS |
1157 | TREE_READONLY (exp) = was_const; |
1158 | } | |
1159 | ||
1160 | static void | |
1161 | expand_default_init (binfo, true_exp, exp, type, init, alias_this, flags) | |
1162 | tree binfo; | |
1163 | tree true_exp, exp; | |
1164 | tree type; | |
1165 | tree init; | |
1166 | int alias_this; | |
1167 | int flags; | |
1168 | { | |
1169 | /* It fails because there may not be a constructor which takes | |
1170 | its own type as the first (or only parameter), but which does | |
1171 | take other types via a conversion. So, if the thing initializing | |
1172 | the expression is a unit element of type X, first try X(X&), | |
1173 | followed by initialization by X. If neither of these work | |
1174 | out, then look hard. */ | |
1175 | tree rval; | |
1176 | tree parms; | |
8d08fdba | 1177 | |
b7484fbe MS |
1178 | if (init == NULL_TREE |
1179 | || (TREE_CODE (init) == TREE_LIST && ! TREE_TYPE (init))) | |
8d08fdba MS |
1180 | { |
1181 | parms = init; | |
db5ae43f MS |
1182 | if (parms) |
1183 | init = TREE_VALUE (parms); | |
8d08fdba | 1184 | } |
8ccc31eb MS |
1185 | else if (TREE_CODE (init) == INDIRECT_REF && TREE_HAS_CONSTRUCTOR (init) |
1186 | && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (init))) | |
8d08fdba MS |
1187 | { |
1188 | rval = convert_for_initialization (exp, type, init, 0, 0, 0, 0); | |
f376e137 | 1189 | TREE_USED (rval) = 1; |
8d08fdba MS |
1190 | expand_expr_stmt (rval); |
1191 | return; | |
1192 | } | |
1193 | else | |
1194 | parms = build_tree_list (NULL_TREE, init); | |
1195 | ||
8d08fdba MS |
1196 | if (TYPE_USES_VIRTUAL_BASECLASSES (type)) |
1197 | { | |
1198 | if (true_exp == exp) | |
1199 | parms = tree_cons (NULL_TREE, integer_one_node, parms); | |
1200 | else | |
1201 | parms = tree_cons (NULL_TREE, integer_zero_node, parms); | |
1202 | flags |= LOOKUP_HAS_IN_CHARGE; | |
1203 | } | |
1204 | ||
db5ae43f | 1205 | if (init && TREE_CHAIN (parms) == NULL_TREE |
e8abc66f | 1206 | && TYPE_HAS_TRIVIAL_INIT_REF (type) |
db5ae43f | 1207 | && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (init))) |
8d08fdba | 1208 | { |
db5ae43f MS |
1209 | rval = build (INIT_EXPR, type, exp, init); |
1210 | TREE_SIDE_EFFECTS (rval) = 1; | |
1211 | expand_expr_stmt (rval); | |
8d08fdba | 1212 | } |
db5ae43f | 1213 | else |
8d08fdba | 1214 | { |
db5ae43f MS |
1215 | rval = build_method_call (exp, constructor_name_full (type), |
1216 | parms, binfo, flags); | |
8d08fdba | 1217 | |
db5ae43f MS |
1218 | /* Private, protected, or otherwise unavailable. */ |
1219 | if (rval == error_mark_node) | |
8d08fdba | 1220 | { |
db5ae43f MS |
1221 | if (flags & LOOKUP_COMPLAIN) |
1222 | cp_error ("in base initialization for %sclass `%T'", | |
1223 | TREE_VIA_VIRTUAL (binfo) ? "virtual base " : "", | |
1224 | binfo); | |
8d08fdba | 1225 | } |
db5ae43f MS |
1226 | else if (rval == NULL_TREE) |
1227 | my_friendly_abort (361); | |
8d08fdba MS |
1228 | else |
1229 | { | |
db5ae43f MS |
1230 | /* p. 222: if the base class assigns to `this', then that |
1231 | value is used in the derived class. */ | |
1232 | if ((flag_this_is_variable & 1) && alias_this) | |
1233 | { | |
1234 | TREE_TYPE (rval) = TREE_TYPE (current_class_decl); | |
1235 | expand_assignment (current_class_decl, rval, 0, 0); | |
1236 | } | |
1237 | else | |
1238 | expand_expr_stmt (rval); | |
8d08fdba | 1239 | } |
8d08fdba | 1240 | } |
8d08fdba MS |
1241 | } |
1242 | ||
1243 | /* This function is responsible for initializing EXP with INIT | |
1244 | (if any). | |
1245 | ||
1246 | BINFO is the binfo of the type for who we are performing the | |
1247 | initialization. For example, if W is a virtual base class of A and B, | |
1248 | and C : A, B. | |
1249 | If we are initializing B, then W must contain B's W vtable, whereas | |
1250 | were we initializing C, W must contain C's W vtable. | |
1251 | ||
1252 | TRUE_EXP is nonzero if it is the true expression being initialized. | |
1253 | In this case, it may be EXP, or may just contain EXP. The reason we | |
1254 | need this is because if EXP is a base element of TRUE_EXP, we | |
1255 | don't necessarily know by looking at EXP where its virtual | |
1256 | baseclass fields should really be pointing. But we do know | |
1257 | from TRUE_EXP. In constructors, we don't know anything about | |
1258 | the value being initialized. | |
1259 | ||
1260 | ALIAS_THIS serves the same purpose it serves for expand_aggr_init. | |
1261 | ||
1262 | FLAGS is just passes to `build_method_call'. See that function for | |
1263 | its description. */ | |
1264 | ||
1265 | static void | |
1266 | expand_aggr_init_1 (binfo, true_exp, exp, init, alias_this, flags) | |
1267 | tree binfo; | |
1268 | tree true_exp, exp; | |
1269 | tree init; | |
1270 | int alias_this; | |
1271 | int flags; | |
1272 | { | |
1273 | tree type = TREE_TYPE (exp); | |
1274 | tree init_type = NULL_TREE; | |
8d08fdba MS |
1275 | |
1276 | my_friendly_assert (init != error_mark_node && type != error_mark_node, 211); | |
1277 | ||
1278 | /* Use a function returning the desired type to initialize EXP for us. | |
1279 | If the function is a constructor, and its first argument is | |
1280 | NULL_TREE, know that it was meant for us--just slide exp on | |
1281 | in and expand the constructor. Constructors now come | |
1282 | as TARGET_EXPRs. */ | |
1283 | if (init) | |
1284 | { | |
1285 | tree init_list = NULL_TREE; | |
1286 | ||
1287 | if (TREE_CODE (init) == TREE_LIST) | |
1288 | { | |
1289 | init_list = init; | |
1290 | if (TREE_CHAIN (init) == NULL_TREE) | |
1291 | init = TREE_VALUE (init); | |
1292 | } | |
1293 | ||
1294 | init_type = TREE_TYPE (init); | |
1295 | ||
1296 | if (TREE_CODE (init) != TREE_LIST) | |
1297 | { | |
1298 | if (TREE_CODE (init_type) == ERROR_MARK) | |
1299 | return; | |
1300 | ||
1301 | #if 0 | |
1302 | /* These lines are found troublesome 5/11/89. */ | |
1303 | if (TREE_CODE (init_type) == REFERENCE_TYPE) | |
1304 | init_type = TREE_TYPE (init_type); | |
1305 | #endif | |
1306 | ||
1307 | /* This happens when we use C++'s functional cast notation. | |
1308 | If the types match, then just use the TARGET_EXPR | |
1309 | directly. Otherwise, we need to create the initializer | |
1310 | separately from the object being initialized. */ | |
1311 | if (TREE_CODE (init) == TARGET_EXPR) | |
1312 | { | |
a292b002 | 1313 | if (TYPE_MAIN_VARIANT (init_type) == TYPE_MAIN_VARIANT (type)) |
8d08fdba MS |
1314 | { |
1315 | if (TREE_CODE (exp) == VAR_DECL | |
1316 | || TREE_CODE (exp) == RESULT_DECL) | |
1317 | /* Unify the initialization targets. */ | |
1318 | DECL_RTL (TREE_OPERAND (init, 0)) = DECL_RTL (exp); | |
1319 | else | |
1320 | DECL_RTL (TREE_OPERAND (init, 0)) = expand_expr (exp, NULL_RTX, 0, 0); | |
1321 | ||
1322 | expand_expr_stmt (init); | |
1323 | return; | |
1324 | } | |
1325 | else | |
1326 | { | |
1327 | init = TREE_OPERAND (init, 1); | |
1328 | init = build (CALL_EXPR, init_type, | |
1329 | TREE_OPERAND (init, 0), TREE_OPERAND (init, 1), 0); | |
1330 | TREE_SIDE_EFFECTS (init) = 1; | |
8d08fdba MS |
1331 | if (init_list) |
1332 | TREE_VALUE (init_list) = init; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | if (init_type == type && TREE_CODE (init) == CALL_EXPR | |
1337 | #if 0 | |
59be0cdd | 1338 | /* It is valid to directly initialize from a CALL_EXPR |
8d08fdba MS |
1339 | without going through X(X&), apparently. */ |
1340 | && ! TYPE_GETS_INIT_REF (type) | |
1341 | #endif | |
1342 | ) | |
1343 | { | |
1344 | /* A CALL_EXPR is a legitimate form of initialization, so | |
1345 | we should not print this warning message. */ | |
1346 | #if 0 | |
1347 | /* Should have gone away due to 5/11/89 change. */ | |
1348 | if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE) | |
1349 | init = convert_from_reference (init); | |
1350 | #endif | |
1351 | expand_assignment (exp, init, 0, 0); | |
1352 | if (exp == DECL_RESULT (current_function_decl)) | |
1353 | { | |
1354 | /* Failing this assertion means that the return value | |
1355 | from receives multiple initializations. */ | |
1356 | my_friendly_assert (DECL_INITIAL (exp) == NULL_TREE | |
1357 | || DECL_INITIAL (exp) == error_mark_node, | |
1358 | 212); | |
1359 | DECL_INITIAL (exp) = init; | |
1360 | } | |
1361 | return; | |
1362 | } | |
1363 | else if (init_type == type | |
1364 | && TREE_CODE (init) == COND_EXPR) | |
1365 | { | |
1366 | /* Push value to be initialized into the cond, where possible. | |
1367 | Avoid spurious warning messages when initializing the | |
1368 | result of this function. */ | |
1369 | TREE_OPERAND (init, 1) | |
1370 | = build_modify_expr (exp, INIT_EXPR, TREE_OPERAND (init, 1)); | |
1371 | if (exp == DECL_RESULT (current_function_decl)) | |
1372 | DECL_INITIAL (exp) = NULL_TREE; | |
1373 | TREE_OPERAND (init, 2) | |
1374 | = build_modify_expr (exp, INIT_EXPR, TREE_OPERAND (init, 2)); | |
1375 | if (exp == DECL_RESULT (current_function_decl)) | |
1376 | DECL_INITIAL (exp) = init; | |
1377 | TREE_SIDE_EFFECTS (init) = 1; | |
1378 | expand_expr (init, const0_rtx, VOIDmode, 0); | |
1379 | free_temp_slots (); | |
1380 | return; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /* We did not know what we were initializing before. Now we do. */ | |
1385 | if (TREE_CODE (init) == TARGET_EXPR) | |
1386 | { | |
1387 | tree tmp = TREE_OPERAND (TREE_OPERAND (init, 1), 1); | |
1388 | ||
1389 | if (TREE_CODE (TREE_VALUE (tmp)) == NOP_EXPR | |
1390 | && TREE_OPERAND (TREE_VALUE (tmp), 0) == integer_zero_node) | |
1391 | { | |
1392 | /* In order for this to work for RESULT_DECLs, if their | |
1393 | type has a constructor, then they must be BLKmode | |
1394 | so that they will be meaningfully addressable. */ | |
1395 | tree arg = build_unary_op (ADDR_EXPR, exp, 0); | |
1396 | init = TREE_OPERAND (init, 1); | |
1397 | init = build (CALL_EXPR, build_pointer_type (TREE_TYPE (init)), | |
1398 | TREE_OPERAND (init, 0), TREE_OPERAND (init, 1), 0); | |
1399 | TREE_SIDE_EFFECTS (init) = 1; | |
8d08fdba MS |
1400 | TREE_VALUE (TREE_OPERAND (init, 1)) |
1401 | = convert_pointer_to (TREE_TYPE (TREE_TYPE (TREE_VALUE (tmp))), arg); | |
1402 | ||
1403 | if (alias_this) | |
1404 | { | |
1405 | expand_assignment (current_function_decl, init, 0, 0); | |
1406 | return; | |
1407 | } | |
1408 | if (exp == DECL_RESULT (current_function_decl)) | |
1409 | { | |
1410 | if (DECL_INITIAL (DECL_RESULT (current_function_decl))) | |
1411 | fatal ("return value from function receives multiple initializations"); | |
1412 | DECL_INITIAL (exp) = init; | |
1413 | } | |
1414 | expand_expr_stmt (init); | |
1415 | return; | |
1416 | } | |
1417 | } | |
1418 | ||
1419 | if (TREE_CODE (exp) == VAR_DECL | |
1420 | && TREE_CODE (init) == CONSTRUCTOR | |
1421 | && TREE_HAS_CONSTRUCTOR (init)) | |
1422 | { | |
1423 | tree t = store_init_value (exp, init); | |
1424 | if (!t) | |
1425 | { | |
1426 | expand_decl_init (exp); | |
1427 | return; | |
1428 | } | |
1429 | t = build (INIT_EXPR, type, exp, init); | |
1430 | TREE_SIDE_EFFECTS (t) = 1; | |
1431 | expand_expr_stmt (t); | |
1432 | return; | |
1433 | } | |
1434 | ||
1435 | /* Handle this case: when calling a constructor: xyzzy foo(bar); | |
1436 | which really means: xyzzy foo = bar; Ugh! | |
1437 | ||
1438 | More useful for this case: xyzzy *foo = new xyzzy (bar); */ | |
1439 | ||
1440 | if (! TYPE_NEEDS_CONSTRUCTING (type) && ! IS_AGGR_TYPE (type)) | |
1441 | { | |
1442 | if (init_list && TREE_CHAIN (init_list)) | |
1443 | { | |
1444 | warning ("initializer list being treated as compound expression"); | |
1445 | init = convert (type, build_compound_expr (init_list)); | |
1446 | if (init == error_mark_node) | |
1447 | return; | |
1448 | } | |
1449 | ||
1450 | expand_assignment (exp, init, 0, 0); | |
1451 | ||
1452 | return; | |
1453 | } | |
1454 | /* See whether we can go through a type conversion operator. | |
1455 | This wins over going through a non-existent constructor. If | |
1456 | there is a constructor, it is ambiguous. */ | |
1457 | if (TREE_CODE (init) != TREE_LIST) | |
1458 | { | |
1459 | tree ttype = TREE_CODE (init_type) == REFERENCE_TYPE | |
1460 | ? TREE_TYPE (init_type) : init_type; | |
1461 | ||
1462 | if (ttype != type && IS_AGGR_TYPE (ttype)) | |
1463 | { | |
1464 | tree rval = build_type_conversion (CONVERT_EXPR, type, init, 0); | |
1465 | ||
1466 | if (rval) | |
1467 | { | |
1468 | /* See if there is a constructor for``type'' that takes a | |
1469 | ``ttype''-typed object. */ | |
1470 | tree parms = build_tree_list (NULL_TREE, init); | |
1471 | tree as_cons = NULL_TREE; | |
1472 | if (TYPE_HAS_CONSTRUCTOR (type)) | |
1473 | as_cons = build_method_call (exp, constructor_name_full (type), | |
1474 | parms, binfo, | |
1475 | LOOKUP_SPECULATIVELY|LOOKUP_NO_CONVERSION); | |
1476 | if (as_cons != NULL_TREE && as_cons != error_mark_node) | |
1477 | /* ANSI C++ June 5 1992 WP 12.3.2.6.1 */ | |
1478 | cp_error ("ambiguity between conversion to `%T' and constructor", | |
1479 | type); | |
1480 | else | |
1481 | expand_assignment (exp, rval, 0, 0); | |
1482 | return; | |
1483 | } | |
1484 | } | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | /* Handle default copy constructors here, does not matter if there is | |
1489 | a constructor or not. */ | |
1490 | if (type == init_type && IS_AGGR_TYPE (type) | |
1491 | && init && TREE_CODE (init) != TREE_LIST) | |
1492 | expand_default_init (binfo, true_exp, exp, type, init, alias_this, flags); | |
1493 | /* Not sure why this is here... */ | |
1494 | else if (TYPE_HAS_CONSTRUCTOR (type)) | |
1495 | expand_default_init (binfo, true_exp, exp, type, init, alias_this, flags); | |
1496 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
1497 | { | |
1498 | if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (type))) | |
1499 | expand_vec_init (exp, exp, array_type_nelts (type), init, 0); | |
1500 | else if (TYPE_VIRTUAL_P (TREE_TYPE (type))) | |
1501 | sorry ("arrays of objects with virtual functions but no constructors"); | |
1502 | } | |
1503 | else | |
1504 | expand_recursive_init (binfo, true_exp, exp, init, | |
1505 | CLASSTYPE_BASE_INIT_LIST (type), alias_this); | |
1506 | } | |
1507 | ||
1508 | /* A pointer which holds the initializer. First call to | |
1509 | expand_aggr_init gets this value pointed to, and sets it to init_null. */ | |
1510 | static tree *init_ptr, init_null; | |
1511 | ||
1512 | /* Subroutine of expand_recursive_init: | |
1513 | ||
1514 | ADDR is the address of the expression being initialized. | |
1515 | INIT_LIST is the cons-list of initializations to be performed. | |
1516 | ALIAS_THIS is its same, lovable self. */ | |
1517 | static void | |
1518 | expand_recursive_init_1 (binfo, true_exp, addr, init_list, alias_this) | |
1519 | tree binfo, true_exp, addr; | |
1520 | tree init_list; | |
1521 | int alias_this; | |
1522 | { | |
1523 | while (init_list) | |
1524 | { | |
1525 | if (TREE_PURPOSE (init_list)) | |
1526 | { | |
1527 | if (TREE_CODE (TREE_PURPOSE (init_list)) == FIELD_DECL) | |
1528 | { | |
1529 | tree member = TREE_PURPOSE (init_list); | |
1530 | tree subexp = build_indirect_ref (convert_pointer_to (TREE_VALUE (init_list), addr), NULL_PTR); | |
1531 | tree member_base = build (COMPONENT_REF, TREE_TYPE (member), subexp, member); | |
1532 | if (IS_AGGR_TYPE (TREE_TYPE (member))) | |
6060a796 | 1533 | expand_aggr_init (member_base, DECL_INITIAL (member), 0, 0); |
8d08fdba MS |
1534 | else if (TREE_CODE (TREE_TYPE (member)) == ARRAY_TYPE |
1535 | && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (member))) | |
1536 | { | |
1537 | member_base = save_expr (default_conversion (member_base)); | |
1538 | expand_vec_init (member, member_base, | |
1539 | array_type_nelts (TREE_TYPE (member)), | |
1540 | DECL_INITIAL (member), 0); | |
1541 | } | |
1542 | else | |
1543 | expand_expr_stmt (build_modify_expr (member_base, INIT_EXPR, DECL_INITIAL (member))); | |
1544 | } | |
1545 | else if (TREE_CODE (TREE_PURPOSE (init_list)) == TREE_LIST) | |
1546 | { | |
1547 | expand_recursive_init_1 (binfo, true_exp, addr, TREE_PURPOSE (init_list), alias_this); | |
1548 | expand_recursive_init_1 (binfo, true_exp, addr, TREE_VALUE (init_list), alias_this); | |
1549 | } | |
1550 | else if (TREE_CODE (TREE_PURPOSE (init_list)) == ERROR_MARK) | |
1551 | { | |
1552 | /* Only initialize the virtual function tables if we | |
1553 | are initializing the ultimate users of those vtables. */ | |
1554 | if (TREE_VALUE (init_list)) | |
1555 | { | |
7177d104 | 1556 | /* We have to ensure that the first argment to |
8926095f | 1557 | expand_virtual_init is in binfo's hierarchy. */ |
7177d104 MS |
1558 | /* Is it the case that this is exactly the right binfo? */ |
1559 | /* If it is ok, then fixup expand_virtual_init, to make | |
1560 | it much simpler. */ | |
1561 | expand_virtual_init (get_binfo (TREE_VALUE (init_list), binfo, 0), | |
8926095f | 1562 | addr); |
8d08fdba MS |
1563 | if (TREE_VALUE (init_list) == binfo |
1564 | && TYPE_USES_VIRTUAL_BASECLASSES (BINFO_TYPE (binfo))) | |
7177d104 | 1565 | expand_indirect_vtbls_init (binfo, true_exp, addr, 1); |
8d08fdba MS |
1566 | } |
1567 | } | |
1568 | else | |
1569 | my_friendly_abort (49); | |
1570 | } | |
1571 | else if (TREE_VALUE (init_list) | |
1572 | && TREE_CODE (TREE_VALUE (init_list)) == TREE_VEC) | |
1573 | { | |
1574 | tree subexp = build_indirect_ref (convert_pointer_to (TREE_VALUE (init_list), addr), NULL_PTR); | |
1575 | expand_aggr_init_1 (binfo, true_exp, subexp, *init_ptr, | |
1576 | alias_this && BINFO_OFFSET_ZEROP (TREE_VALUE (init_list)), | |
1577 | LOOKUP_COMPLAIN); | |
1578 | ||
1579 | /* INIT_PTR is used up. */ | |
1580 | init_ptr = &init_null; | |
1581 | } | |
1582 | else | |
1583 | my_friendly_abort (50); | |
1584 | init_list = TREE_CHAIN (init_list); | |
1585 | } | |
1586 | } | |
1587 | ||
1588 | /* Initialize EXP with INIT. Type EXP does not have a constructor, | |
1589 | but it has a baseclass with a constructor or a virtual function | |
1590 | table which needs initializing. | |
1591 | ||
1592 | INIT_LIST is a cons-list describing what parts of EXP actually | |
1593 | need to be initialized. INIT is given to the *unique*, first | |
1594 | constructor within INIT_LIST. If there are multiple first | |
1595 | constructors, such as with multiple inheritance, INIT must | |
1596 | be zero or an ambiguity error is reported. | |
1597 | ||
1598 | ALIAS_THIS is passed from `expand_aggr_init'. See comments | |
1599 | there. */ | |
1600 | ||
1601 | static void | |
1602 | expand_recursive_init (binfo, true_exp, exp, init, init_list, alias_this) | |
1603 | tree binfo, true_exp, exp, init; | |
1604 | tree init_list; | |
1605 | int alias_this; | |
1606 | { | |
1607 | tree *old_init_ptr = init_ptr; | |
1608 | tree addr = build_unary_op (ADDR_EXPR, exp, 0); | |
1609 | init_ptr = &init; | |
1610 | ||
1611 | if (true_exp == exp && TYPE_USES_VIRTUAL_BASECLASSES (BINFO_TYPE (binfo))) | |
1612 | { | |
1613 | expand_aggr_vbase_init (binfo, exp, addr, init_list); | |
7177d104 | 1614 | expand_indirect_vtbls_init (binfo, true_exp, addr, 1); |
8d08fdba MS |
1615 | } |
1616 | expand_recursive_init_1 (binfo, true_exp, addr, init_list, alias_this); | |
1617 | ||
1618 | if (*init_ptr) | |
1619 | { | |
1620 | tree type = TREE_TYPE (exp); | |
1621 | ||
1622 | if (TREE_CODE (type) == REFERENCE_TYPE) | |
1623 | type = TREE_TYPE (type); | |
1624 | if (IS_AGGR_TYPE (type)) | |
1625 | cp_error ("unexpected argument to constructor `%T'", type); | |
1626 | else | |
1627 | error ("unexpected argument to constructor"); | |
1628 | } | |
1629 | init_ptr = old_init_ptr; | |
1630 | } | |
1631 | ||
1632 | /* Report an error if NAME is not the name of a user-defined, | |
1633 | aggregate type. If OR_ELSE is nonzero, give an error message. */ | |
1634 | int | |
1635 | is_aggr_typedef (name, or_else) | |
1636 | tree name; | |
1637 | int or_else; | |
1638 | { | |
1639 | tree type; | |
1640 | ||
1641 | if (name == error_mark_node) | |
1642 | return 0; | |
1643 | ||
1644 | if (IDENTIFIER_HAS_TYPE_VALUE (name)) | |
1645 | type = IDENTIFIER_TYPE_VALUE (name); | |
8d08fdba MS |
1646 | else |
1647 | { | |
1648 | if (or_else) | |
a28e3c7f | 1649 | cp_error ("`%T' is not an aggregate typedef", name); |
8d08fdba MS |
1650 | return 0; |
1651 | } | |
1652 | ||
1653 | if (! IS_AGGR_TYPE (type) | |
1654 | && TREE_CODE (type) != TEMPLATE_TYPE_PARM) | |
1655 | { | |
1656 | if (or_else) | |
a28e3c7f | 1657 | cp_error ("`%T' is not an aggregate type", type); |
8d08fdba MS |
1658 | return 0; |
1659 | } | |
1660 | return 1; | |
1661 | } | |
1662 | ||
1663 | /* Like is_aggr_typedef, but returns typedef if successful. */ | |
1664 | tree | |
1665 | get_aggr_from_typedef (name, or_else) | |
1666 | tree name; | |
1667 | int or_else; | |
1668 | { | |
1669 | tree type; | |
1670 | ||
1671 | if (name == error_mark_node) | |
1672 | return NULL_TREE; | |
1673 | ||
1674 | if (IDENTIFIER_HAS_TYPE_VALUE (name)) | |
1675 | type = IDENTIFIER_TYPE_VALUE (name); | |
8d08fdba MS |
1676 | else |
1677 | { | |
1678 | if (or_else) | |
1679 | cp_error ("`%T' fails to be an aggregate typedef", name); | |
1680 | return NULL_TREE; | |
1681 | } | |
1682 | ||
1683 | if (! IS_AGGR_TYPE (type) | |
1684 | && TREE_CODE (type) != TEMPLATE_TYPE_PARM) | |
1685 | { | |
1686 | if (or_else) | |
1687 | cp_error ("type `%T' is of non-aggregate type", type); | |
1688 | return NULL_TREE; | |
1689 | } | |
1690 | return type; | |
1691 | } | |
1692 | ||
1693 | tree | |
1694 | get_type_value (name) | |
1695 | tree name; | |
1696 | { | |
8d08fdba MS |
1697 | if (name == error_mark_node) |
1698 | return NULL_TREE; | |
1699 | ||
1700 | if (IDENTIFIER_HAS_TYPE_VALUE (name)) | |
1701 | return IDENTIFIER_TYPE_VALUE (name); | |
8d08fdba MS |
1702 | else |
1703 | return NULL_TREE; | |
1704 | } | |
1705 | ||
1706 | \f | |
51c184be | 1707 | /* This code could just as well go in `class.c', but is placed here for |
8d08fdba MS |
1708 | modularity. */ |
1709 | ||
1710 | /* For an expression of the form CNAME :: NAME (PARMLIST), build | |
1711 | the appropriate function call. */ | |
1712 | tree | |
1713 | build_member_call (cname, name, parmlist) | |
1714 | tree cname, name, parmlist; | |
1715 | { | |
1716 | tree type, t; | |
1717 | tree method_name = name; | |
1718 | int dtor = 0; | |
1719 | int dont_use_this = 0; | |
1720 | tree basetype_path, decl; | |
1721 | ||
1722 | if (TREE_CODE (method_name) == BIT_NOT_EXPR) | |
1723 | { | |
1724 | method_name = TREE_OPERAND (method_name, 0); | |
1725 | dtor = 1; | |
1726 | } | |
1727 | ||
1728 | if (TREE_CODE (cname) == SCOPE_REF) | |
1729 | cname = resolve_scope_to_name (NULL_TREE, cname); | |
1730 | ||
1731 | if (cname == NULL_TREE || ! (type = get_aggr_from_typedef (cname, 1))) | |
1732 | return error_mark_node; | |
1733 | ||
1734 | /* An operator we did not like. */ | |
1735 | if (name == NULL_TREE) | |
1736 | return error_mark_node; | |
1737 | ||
1738 | if (dtor) | |
1739 | { | |
1740 | #if 0 | |
1741 | /* Everything can explicitly call a destructor; see 12.4 */ | |
1742 | if (! TYPE_HAS_DESTRUCTOR (type)) | |
1743 | cp_error ("type `%#T' does not have a destructor", type); | |
1744 | else | |
1745 | #endif | |
1746 | cp_error ("cannot call destructor `%T::~%T' without object", type, | |
1747 | method_name); | |
1748 | return error_mark_node; | |
1749 | } | |
1750 | ||
1751 | /* No object? Then just fake one up, and let build_method_call | |
1752 | figure out what to do. */ | |
1753 | if (current_class_type == 0 | |
1754 | || get_base_distance (type, current_class_type, 0, &basetype_path) == -1) | |
1755 | dont_use_this = 1; | |
1756 | ||
1757 | if (dont_use_this) | |
1758 | { | |
39211cd5 | 1759 | basetype_path = TYPE_BINFO (type); |
8d08fdba MS |
1760 | decl = build1 (NOP_EXPR, TYPE_POINTER_TO (type), error_mark_node); |
1761 | } | |
1762 | else if (current_class_decl == 0) | |
1763 | { | |
1764 | dont_use_this = 1; | |
1765 | decl = build1 (NOP_EXPR, TYPE_POINTER_TO (type), error_mark_node); | |
1766 | } | |
1767 | else | |
1768 | { | |
1769 | tree olddecl = current_class_decl; | |
1770 | tree oldtype = TREE_TYPE (TREE_TYPE (olddecl)); | |
1771 | if (oldtype != type) | |
1772 | { | |
1773 | tree newtype = build_type_variant (type, TYPE_READONLY (oldtype), | |
1774 | TYPE_VOLATILE (oldtype)); | |
6060a796 | 1775 | decl = convert_force (build_pointer_type (newtype), olddecl, 0); |
8d08fdba MS |
1776 | } |
1777 | else | |
1778 | decl = olddecl; | |
1779 | } | |
1780 | ||
1781 | decl = build_indirect_ref (decl, NULL_PTR); | |
1782 | ||
71851aaa MS |
1783 | if (method_name == constructor_name (type) |
1784 | || method_name == constructor_name_full (type)) | |
1785 | return build_functional_cast (type, parmlist); | |
39211cd5 | 1786 | if (t = lookup_fnfields (basetype_path, method_name, 0)) |
8d08fdba MS |
1787 | return build_method_call (decl, method_name, parmlist, basetype_path, |
1788 | LOOKUP_NORMAL|LOOKUP_NONVIRTUAL); | |
1789 | if (TREE_CODE (name) == IDENTIFIER_NODE | |
8926095f | 1790 | && ((t = lookup_field (TYPE_BINFO (type), name, 1, 0)))) |
8d08fdba MS |
1791 | { |
1792 | if (t == error_mark_node) | |
1793 | return error_mark_node; | |
1794 | if (TREE_CODE (t) == FIELD_DECL) | |
1795 | { | |
1796 | if (dont_use_this) | |
1797 | { | |
1798 | cp_error ("invalid use of non-static field `%D'", t); | |
1799 | return error_mark_node; | |
1800 | } | |
1801 | decl = build (COMPONENT_REF, TREE_TYPE (t), decl, t); | |
1802 | } | |
1803 | else if (TREE_CODE (t) == VAR_DECL) | |
1804 | decl = t; | |
1805 | else | |
1806 | { | |
1807 | cp_error ("invalid use of member `%D'", t); | |
1808 | return error_mark_node; | |
1809 | } | |
1810 | if (TYPE_LANG_SPECIFIC (TREE_TYPE (decl)) | |
1811 | && TYPE_OVERLOADS_CALL_EXPR (TREE_TYPE (decl))) | |
1812 | return build_opfncall (CALL_EXPR, LOOKUP_NORMAL, decl, parmlist, NULL_TREE); | |
1813 | return build_function_call (decl, parmlist); | |
1814 | } | |
1815 | else | |
1816 | { | |
1817 | cp_error ("no method `%T::%D'", type, name); | |
1818 | return error_mark_node; | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | /* Build a reference to a member of an aggregate. This is not a | |
1823 | C++ `&', but really something which can have its address taken, | |
1824 | and then act as a pointer to member, for example CNAME :: FIELD | |
1825 | can have its address taken by saying & CNAME :: FIELD. | |
1826 | ||
1827 | @@ Prints out lousy diagnostics for operator <typename> | |
1828 | @@ fields. | |
1829 | ||
51c184be | 1830 | @@ This function should be rewritten and placed in search.c. */ |
8d08fdba MS |
1831 | tree |
1832 | build_offset_ref (cname, name) | |
1833 | tree cname, name; | |
1834 | { | |
1835 | tree decl, type, fnfields, fields, t = error_mark_node; | |
1836 | tree basetypes = NULL_TREE; | |
1837 | int dtor = 0; | |
1838 | ||
1839 | if (TREE_CODE (cname) == SCOPE_REF) | |
1840 | cname = resolve_scope_to_name (NULL_TREE, cname); | |
1841 | ||
1842 | if (cname == NULL_TREE || ! is_aggr_typedef (cname, 1)) | |
1843 | return error_mark_node; | |
1844 | ||
1845 | type = IDENTIFIER_TYPE_VALUE (cname); | |
1846 | ||
1847 | if (TREE_CODE (name) == BIT_NOT_EXPR) | |
1848 | { | |
1849 | dtor = 1; | |
1850 | name = TREE_OPERAND (name, 0); | |
1851 | } | |
1852 | ||
1853 | if (TYPE_SIZE (type) == 0) | |
1854 | { | |
1855 | t = IDENTIFIER_CLASS_VALUE (name); | |
1856 | if (t == 0) | |
1857 | { | |
1858 | cp_error ("incomplete type `%T' does not have member `%D'", type, | |
1859 | name); | |
1860 | return error_mark_node; | |
1861 | } | |
51c184be MS |
1862 | if (TREE_CODE (t) == TYPE_DECL || TREE_CODE (t) == VAR_DECL |
1863 | || TREE_CODE (t) == CONST_DECL) | |
8d08fdba MS |
1864 | { |
1865 | TREE_USED (t) = 1; | |
1866 | return t; | |
1867 | } | |
1868 | if (TREE_CODE (t) == FIELD_DECL) | |
1869 | sorry ("use of member in incomplete aggregate type"); | |
1870 | else if (TREE_CODE (t) == FUNCTION_DECL) | |
1871 | sorry ("use of member function in incomplete aggregate type"); | |
1872 | else | |
1873 | my_friendly_abort (52); | |
1874 | return error_mark_node; | |
1875 | } | |
1876 | ||
39211cd5 | 1877 | #if 0 |
8d08fdba MS |
1878 | if (TREE_CODE (name) == TYPE_EXPR) |
1879 | /* Pass a TYPE_DECL to build_component_type_expr. */ | |
1880 | return build_component_type_expr (TYPE_NAME (TREE_TYPE (cname)), | |
1881 | name, NULL_TREE, 1); | |
39211cd5 | 1882 | #endif |
8d08fdba | 1883 | |
8d08fdba MS |
1884 | if (current_class_type == 0 |
1885 | || get_base_distance (type, current_class_type, 0, &basetypes) == -1) | |
1886 | { | |
1887 | basetypes = TYPE_BINFO (type); | |
1888 | decl = build1 (NOP_EXPR, | |
1889 | IDENTIFIER_TYPE_VALUE (cname), | |
1890 | error_mark_node); | |
1891 | } | |
1892 | else if (current_class_decl == 0) | |
1893 | decl = build1 (NOP_EXPR, IDENTIFIER_TYPE_VALUE (cname), | |
1894 | error_mark_node); | |
1895 | else | |
1896 | decl = C_C_D; | |
1897 | ||
00595019 MS |
1898 | fnfields = lookup_fnfields (basetypes, name, 1); |
1899 | fields = lookup_field (basetypes, name, 0, 0); | |
1900 | ||
1901 | if (fields == error_mark_node || fnfields == error_mark_node) | |
1902 | return error_mark_node; | |
1903 | ||
8d08fdba MS |
1904 | /* A lot of this logic is now handled in lookup_field and |
1905 | lookup_fnfield. */ | |
1906 | if (fnfields) | |
1907 | { | |
1908 | basetypes = TREE_PURPOSE (fnfields); | |
1909 | ||
1910 | /* Go from the TREE_BASELINK to the member function info. */ | |
1911 | t = TREE_VALUE (fnfields); | |
1912 | ||
1913 | if (fields) | |
1914 | { | |
1915 | if (DECL_FIELD_CONTEXT (fields) == DECL_FIELD_CONTEXT (t)) | |
1916 | { | |
1917 | error ("ambiguous member reference: member `%s' defined as both field and function", | |
1918 | IDENTIFIER_POINTER (name)); | |
1919 | return error_mark_node; | |
1920 | } | |
1921 | if (UNIQUELY_DERIVED_FROM_P (DECL_FIELD_CONTEXT (fields), DECL_FIELD_CONTEXT (t))) | |
1922 | ; | |
1923 | else if (UNIQUELY_DERIVED_FROM_P (DECL_FIELD_CONTEXT (t), DECL_FIELD_CONTEXT (fields))) | |
1924 | t = fields; | |
1925 | else | |
1926 | { | |
1927 | error ("ambiguous member reference: member `%s' derives from distinct classes in multiple inheritance lattice"); | |
1928 | return error_mark_node; | |
1929 | } | |
1930 | } | |
1931 | ||
1932 | if (t == TREE_VALUE (fnfields)) | |
1933 | { | |
1934 | extern int flag_save_memoized_contexts; | |
1935 | ||
8d08fdba MS |
1936 | if (DECL_CHAIN (t) == NULL_TREE || dtor) |
1937 | { | |
1938 | enum access_type access; | |
1939 | ||
1940 | /* unique functions are handled easily. */ | |
1941 | unique: | |
1942 | access = compute_access (basetypes, t); | |
1943 | if (access == access_protected) | |
1944 | { | |
1945 | cp_error_at ("member function `%#D' is protected", t); | |
1946 | error ("in this context"); | |
1947 | return error_mark_node; | |
1948 | } | |
1949 | if (access == access_private) | |
1950 | { | |
1951 | cp_error_at ("member function `%#D' is private", t); | |
1952 | error ("in this context"); | |
1953 | return error_mark_node; | |
1954 | } | |
1955 | assemble_external (t); | |
1956 | return build (OFFSET_REF, TREE_TYPE (t), decl, t); | |
1957 | } | |
1958 | ||
1959 | /* overloaded functions may need more work. */ | |
1960 | if (cname == name) | |
1961 | { | |
1962 | if (TYPE_HAS_DESTRUCTOR (type) | |
1963 | && DECL_CHAIN (DECL_CHAIN (t)) == NULL_TREE) | |
1964 | { | |
1965 | t = DECL_CHAIN (t); | |
1966 | goto unique; | |
1967 | } | |
1968 | } | |
1969 | /* FNFIELDS is most likely allocated on the search_obstack, | |
1970 | which will go away after this class scope. If we need | |
1971 | to save this value for later (either for memoization | |
1972 | or for use as an initializer for a static variable), then | |
1973 | do so here. | |
1974 | ||
1975 | ??? The smart thing to do for the case of saving initializers | |
1976 | is to resolve them before we're done with this scope. */ | |
1977 | if (!TREE_PERMANENT (fnfields) | |
1978 | && ((flag_save_memoized_contexts && global_bindings_p ()) | |
1979 | || ! allocation_temporary_p ())) | |
1980 | fnfields = copy_list (fnfields); | |
28cbf42c MS |
1981 | |
1982 | for (t = TREE_VALUE (fnfields); t; t = DECL_CHAIN (t)) | |
1983 | assemble_external (t); | |
1984 | ||
8d08fdba MS |
1985 | t = build_tree_list (error_mark_node, fnfields); |
1986 | TREE_TYPE (t) = build_offset_type (type, unknown_type_node); | |
1987 | return t; | |
1988 | } | |
1989 | } | |
1990 | ||
1991 | /* Now that we know we are looking for a field, see if we | |
1992 | have access to that field. Lookup_field will give us the | |
1993 | error message. */ | |
1994 | ||
1995 | t = lookup_field (basetypes, name, 1, 0); | |
1996 | ||
1997 | if (t == error_mark_node) | |
1998 | return error_mark_node; | |
1999 | ||
2000 | if (t == NULL_TREE) | |
2001 | { | |
a4443a08 | 2002 | cp_error ("`%D' is not a member of type `%T'", name, type); |
8d08fdba MS |
2003 | return error_mark_node; |
2004 | } | |
2005 | ||
2006 | if (TREE_CODE (t) == TYPE_DECL) | |
2007 | { | |
51c184be MS |
2008 | TREE_USED (t) = 1; |
2009 | return t; | |
8d08fdba MS |
2010 | } |
2011 | /* static class members and class-specific enum | |
2012 | values can be returned without further ado. */ | |
2013 | if (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == CONST_DECL) | |
2014 | { | |
2015 | assemble_external (t); | |
2016 | TREE_USED (t) = 1; | |
2017 | return t; | |
2018 | } | |
2019 | ||
b7484fbe MS |
2020 | if (TREE_CODE (t) == FIELD_DECL && DECL_BIT_FIELD (t)) |
2021 | { | |
2022 | cp_error ("illegal pointer to bit field `%D'", t); | |
2023 | return error_mark_node; | |
2024 | } | |
2025 | ||
8d08fdba MS |
2026 | /* static class functions too. */ |
2027 | if (TREE_CODE (t) == FUNCTION_DECL && TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE) | |
2028 | my_friendly_abort (53); | |
2029 | ||
2030 | /* In member functions, the form `cname::name' is no longer | |
2031 | equivalent to `this->cname::name'. */ | |
2032 | return build (OFFSET_REF, build_offset_type (type, TREE_TYPE (t)), decl, t); | |
2033 | } | |
2034 | ||
2035 | /* Given an object EXP and a member function reference MEMBER, | |
2036 | return the address of the actual member function. */ | |
2037 | tree | |
2038 | get_member_function (exp_addr_ptr, exp, member) | |
2039 | tree *exp_addr_ptr; | |
2040 | tree exp, member; | |
2041 | { | |
2042 | tree ctype = TREE_TYPE (exp); | |
2043 | tree function = save_expr (build_unary_op (ADDR_EXPR, member, 0)); | |
2044 | ||
2045 | if (TYPE_VIRTUAL_P (ctype) | |
2046 | || (flag_all_virtual == 1 && TYPE_OVERLOADS_METHOD_CALL_EXPR (ctype))) | |
2047 | { | |
2048 | tree e0, e1, e3; | |
2049 | tree exp_addr; | |
2050 | ||
2051 | /* Save away the unadulterated `this' pointer. */ | |
2052 | exp_addr = save_expr (*exp_addr_ptr); | |
2053 | ||
2054 | /* Cast function to signed integer. */ | |
2055 | e0 = build1 (NOP_EXPR, integer_type_node, function); | |
2056 | ||
8d08fdba MS |
2057 | /* There is a hack here that takes advantage of |
2058 | twos complement arithmetic, and the fact that | |
2059 | there are more than one UNITS to the WORD. | |
2060 | If the high bit is set for the `function', | |
2061 | then we pretend it is a virtual function, | |
2062 | and the array indexing will knock this bit | |
2063 | out the top, leaving a valid index. */ | |
2064 | if (UNITS_PER_WORD <= 1) | |
2065 | my_friendly_abort (54); | |
2066 | ||
b7484fbe | 2067 | e1 = build (GT_EXPR, boolean_type_node, e0, integer_zero_node); |
8d08fdba MS |
2068 | e1 = build_compound_expr (tree_cons (NULL_TREE, exp_addr, |
2069 | build_tree_list (NULL_TREE, e1))); | |
2070 | e1 = save_expr (e1); | |
8d08fdba MS |
2071 | |
2072 | if (TREE_SIDE_EFFECTS (*exp_addr_ptr)) | |
2073 | { | |
2074 | exp = build_indirect_ref (exp_addr, NULL_PTR); | |
2075 | *exp_addr_ptr = exp_addr; | |
2076 | } | |
2077 | ||
2078 | /* This is really hairy: if the function pointer is a pointer | |
2079 | to a non-virtual member function, then we can't go mucking | |
2080 | with the `this' pointer (any more than we already have to | |
2081 | this point). If it is a pointer to a virtual member function, | |
2082 | then we have to adjust the `this' pointer according to | |
2083 | what the virtual function table tells us. */ | |
2084 | ||
2085 | e3 = build_vfn_ref (exp_addr_ptr, exp, e0); | |
2086 | my_friendly_assert (e3 != error_mark_node, 213); | |
2087 | ||
2088 | /* Change this pointer type from `void *' to the | |
2089 | type it is really supposed to be. */ | |
2090 | TREE_TYPE (e3) = TREE_TYPE (function); | |
2091 | ||
2092 | /* If non-virtual, use what we had originally. Otherwise, | |
2093 | use the value we get from the virtual function table. */ | |
2094 | *exp_addr_ptr = build_conditional_expr (e1, exp_addr, *exp_addr_ptr); | |
2095 | ||
2096 | function = build_conditional_expr (e1, function, e3); | |
2097 | } | |
2098 | return build_indirect_ref (function, NULL_PTR); | |
2099 | } | |
2100 | ||
2101 | /* If a OFFSET_REF made it through to here, then it did | |
2102 | not have its address taken. */ | |
2103 | ||
2104 | tree | |
2105 | resolve_offset_ref (exp) | |
2106 | tree exp; | |
2107 | { | |
2108 | tree type = TREE_TYPE (exp); | |
2109 | tree base = NULL_TREE; | |
2110 | tree member; | |
2111 | tree basetype, addr; | |
2112 | ||
2113 | if (TREE_CODE (exp) == TREE_LIST) | |
2114 | return build_unary_op (ADDR_EXPR, exp, 0); | |
2115 | ||
2116 | if (TREE_CODE (exp) != OFFSET_REF) | |
2117 | { | |
2118 | my_friendly_assert (TREE_CODE (type) == OFFSET_TYPE, 214); | |
2119 | if (TYPE_OFFSET_BASETYPE (type) != current_class_type) | |
2120 | { | |
2121 | error ("object missing in use of pointer-to-member construct"); | |
2122 | return error_mark_node; | |
2123 | } | |
2124 | member = exp; | |
2125 | type = TREE_TYPE (type); | |
2126 | base = C_C_D; | |
2127 | } | |
2128 | else | |
2129 | { | |
2130 | member = TREE_OPERAND (exp, 1); | |
2131 | base = TREE_OPERAND (exp, 0); | |
2132 | } | |
2133 | ||
2134 | if ((TREE_CODE (member) == VAR_DECL | |
2135 | && ! TYPE_PTRMEMFUNC_P (TREE_TYPE (member))) | |
2136 | || TREE_CODE (TREE_TYPE (member)) == FUNCTION_TYPE) | |
2137 | { | |
2138 | /* These were static members. */ | |
2139 | if (mark_addressable (member) == 0) | |
2140 | return error_mark_node; | |
2141 | return member; | |
2142 | } | |
2143 | ||
2144 | /* Syntax error can cause a member which should | |
2145 | have been seen as static to be grok'd as non-static. */ | |
2146 | if (TREE_CODE (member) == FIELD_DECL && C_C_D == NULL_TREE) | |
2147 | { | |
2148 | if (TREE_ADDRESSABLE (member) == 0) | |
2149 | { | |
2150 | cp_error_at ("member `%D' is non-static in static member function context", member); | |
2151 | error ("at this point in file"); | |
2152 | TREE_ADDRESSABLE (member) = 1; | |
2153 | } | |
2154 | return error_mark_node; | |
2155 | } | |
2156 | ||
2157 | /* The first case is really just a reference to a member of `this'. */ | |
2158 | if (TREE_CODE (member) == FIELD_DECL | |
2159 | && (base == C_C_D | |
2160 | || (TREE_CODE (base) == NOP_EXPR | |
2161 | && TREE_OPERAND (base, 0) == error_mark_node))) | |
2162 | { | |
2163 | tree basetype_path; | |
2164 | enum access_type access; | |
2165 | ||
2166 | if (TREE_CODE (exp) == OFFSET_REF && TREE_CODE (type) == OFFSET_TYPE) | |
39211cd5 | 2167 | basetype = TYPE_OFFSET_BASETYPE (type); |
8d08fdba | 2168 | else |
39211cd5 MS |
2169 | basetype = DECL_CONTEXT (member); |
2170 | ||
2171 | base = current_class_decl; | |
8d08fdba MS |
2172 | |
2173 | if (get_base_distance (basetype, TREE_TYPE (TREE_TYPE (base)), 0, &basetype_path) < 0) | |
2174 | { | |
2175 | error_not_base_type (basetype, TREE_TYPE (TREE_TYPE (base))); | |
2176 | return error_mark_node; | |
2177 | } | |
2178 | addr = convert_pointer_to (basetype, base); | |
2179 | access = compute_access (basetype_path, member); | |
2180 | if (access == access_public) | |
2181 | return build (COMPONENT_REF, TREE_TYPE (member), | |
2182 | build_indirect_ref (addr, NULL_PTR), member); | |
2183 | if (access == access_protected) | |
2184 | { | |
2185 | cp_error_at ("member `%D' is protected", member); | |
2186 | error ("in this context"); | |
2187 | return error_mark_node; | |
2188 | } | |
2189 | if (access == access_private) | |
2190 | { | |
2191 | cp_error_at ("member `%D' is private", member); | |
2192 | error ("in this context"); | |
2193 | return error_mark_node; | |
2194 | } | |
2195 | my_friendly_abort (55); | |
2196 | } | |
2197 | ||
2198 | /* If this is a reference to a member function, then return | |
2199 | the address of the member function (which may involve going | |
2200 | through the object's vtable), otherwise, return an expression | |
2201 | for the dereferenced pointer-to-member construct. */ | |
2202 | addr = build_unary_op (ADDR_EXPR, base, 0); | |
2203 | ||
2204 | if (TREE_CODE (TREE_TYPE (member)) == METHOD_TYPE) | |
2205 | { | |
2206 | basetype = DECL_CLASS_CONTEXT (member); | |
2207 | addr = convert_pointer_to (basetype, addr); | |
2208 | return build_unary_op (ADDR_EXPR, get_member_function (&addr, build_indirect_ref (addr, NULL_PTR), member), 0); | |
2209 | } | |
2210 | else if (TREE_CODE (TREE_TYPE (member)) == OFFSET_TYPE) | |
2211 | { | |
2212 | basetype = TYPE_OFFSET_BASETYPE (TREE_TYPE (member)); | |
2213 | addr = convert_pointer_to (basetype, addr); | |
fef71f9d JM |
2214 | member = convert (ptrdiff_type_node, |
2215 | build_unary_op (ADDR_EXPR, member, 0)); | |
8d08fdba | 2216 | return build1 (INDIRECT_REF, type, |
fef71f9d JM |
2217 | build (PLUS_EXPR, build_pointer_type (type), |
2218 | addr, member)); | |
8d08fdba MS |
2219 | } |
2220 | else if (TYPE_PTRMEMFUNC_P (TREE_TYPE (member))) | |
2221 | { | |
b7484fbe | 2222 | return get_member_function_from_ptrfunc (&addr, member); |
8d08fdba MS |
2223 | } |
2224 | my_friendly_abort (56); | |
2225 | /* NOTREACHED */ | |
2226 | return NULL_TREE; | |
2227 | } | |
2228 | ||
2229 | /* Return either DECL or its known constant value (if it has one). */ | |
2230 | ||
2231 | tree | |
2232 | decl_constant_value (decl) | |
2233 | tree decl; | |
2234 | { | |
2235 | if (! TREE_THIS_VOLATILE (decl) | |
2236 | #if 0 | |
2237 | /* These may be necessary for C, but they break C++. */ | |
2238 | ! TREE_PUBLIC (decl) | |
2239 | /* Don't change a variable array bound or initial value to a constant | |
2240 | in a place where a variable is invalid. */ | |
2241 | && ! pedantic | |
2242 | #endif /* 0 */ | |
2243 | && DECL_INITIAL (decl) != 0 | |
2244 | && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK | |
2245 | /* This is invalid if initial value is not constant. | |
2246 | If it has either a function call, a memory reference, | |
2247 | or a variable, then re-evaluating it could give different results. */ | |
2248 | && TREE_CONSTANT (DECL_INITIAL (decl)) | |
2249 | /* Check for cases where this is sub-optimal, even though valid. */ | |
2250 | && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR | |
2251 | #if 0 | |
2252 | /* We must allow this to work outside of functions so that | |
2253 | static constants can be used for array sizes. */ | |
2254 | && current_function_decl != 0 | |
2255 | && DECL_MODE (decl) != BLKmode | |
2256 | #endif | |
2257 | ) | |
2258 | return DECL_INITIAL (decl); | |
2259 | return decl; | |
2260 | } | |
2261 | \f | |
2262 | /* Friend handling routines. */ | |
2263 | /* Friend data structures: | |
2264 | ||
2265 | Lists of friend functions come from TYPE_DECL nodes. Since all | |
2266 | aggregate types are automatically typedef'd, these nodes are guaranteed | |
2267 | to exist. | |
2268 | ||
2269 | The TREE_PURPOSE of a friend list is the name of the friend, | |
2270 | and its TREE_VALUE is another list. | |
2271 | ||
2272 | For each element of that list, either the TREE_VALUE or the TREE_PURPOSE | |
2273 | will be filled in, but not both. The TREE_VALUE of that list is an | |
2274 | individual function which is a friend. The TREE_PURPOSE of that list | |
2275 | indicates a type in which all functions by that name are friends. | |
2276 | ||
2277 | Lists of friend classes come from _TYPE nodes. Love that consistency | |
2278 | thang. */ | |
2279 | ||
2280 | int | |
2281 | is_friend_type (type1, type2) | |
2282 | tree type1, type2; | |
2283 | { | |
2284 | return is_friend (type1, type2); | |
2285 | } | |
2286 | ||
2287 | int | |
2288 | is_friend (type, supplicant) | |
2289 | tree type, supplicant; | |
2290 | { | |
2291 | int declp; | |
2292 | register tree list; | |
2293 | ||
2294 | if (supplicant == NULL_TREE || type == NULL_TREE) | |
2295 | return 0; | |
2296 | ||
2297 | declp = (TREE_CODE_CLASS (TREE_CODE (supplicant)) == 'd'); | |
2298 | ||
2299 | if (declp) | |
2300 | /* It's a function decl. */ | |
2301 | { | |
2302 | tree list = DECL_FRIENDLIST (TYPE_NAME (type)); | |
2303 | tree name = DECL_NAME (supplicant); | |
b7484fbe MS |
2304 | tree ctype; |
2305 | ||
2306 | if (DECL_FUNCTION_MEMBER_P (supplicant)) | |
2307 | ctype = DECL_CLASS_CONTEXT (supplicant); | |
2308 | else | |
2309 | ctype = NULL_TREE; | |
2310 | ||
8d08fdba MS |
2311 | for (; list ; list = TREE_CHAIN (list)) |
2312 | { | |
2313 | if (name == TREE_PURPOSE (list)) | |
2314 | { | |
2315 | tree friends = TREE_VALUE (list); | |
2316 | name = DECL_ASSEMBLER_NAME (supplicant); | |
2317 | for (; friends ; friends = TREE_CHAIN (friends)) | |
2318 | { | |
2319 | if (ctype == TREE_PURPOSE (friends)) | |
2320 | return 1; | |
2321 | if (name == DECL_ASSEMBLER_NAME (TREE_VALUE (friends))) | |
2322 | return 1; | |
2323 | } | |
2324 | break; | |
2325 | } | |
2326 | } | |
2327 | } | |
2328 | else | |
2329 | /* It's a type. */ | |
2330 | { | |
2331 | if (type == supplicant) | |
2332 | return 1; | |
2333 | ||
2334 | list = CLASSTYPE_FRIEND_CLASSES (TREE_TYPE (TYPE_NAME (type))); | |
2335 | for (; list ; list = TREE_CHAIN (list)) | |
2336 | if (supplicant == TREE_VALUE (list)) | |
2337 | return 1; | |
2338 | } | |
2339 | ||
2340 | { | |
b7484fbe MS |
2341 | tree context; |
2342 | ||
2343 | if (! declp) | |
2344 | context = DECL_CONTEXT (TYPE_NAME (supplicant)); | |
2345 | else if (DECL_FUNCTION_MEMBER_P (supplicant)) | |
2346 | context = DECL_CLASS_CONTEXT (supplicant); | |
2347 | else | |
2348 | context = NULL_TREE; | |
8d08fdba MS |
2349 | |
2350 | if (context) | |
2351 | return is_friend (type, context); | |
2352 | } | |
2353 | ||
2354 | return 0; | |
2355 | } | |
2356 | ||
2357 | /* Add a new friend to the friends of the aggregate type TYPE. | |
2358 | DECL is the FUNCTION_DECL of the friend being added. */ | |
2359 | static void | |
2360 | add_friend (type, decl) | |
2361 | tree type, decl; | |
2362 | { | |
2363 | tree typedecl = TYPE_NAME (type); | |
2364 | tree list = DECL_FRIENDLIST (typedecl); | |
2365 | tree name = DECL_NAME (decl); | |
2366 | ||
2367 | while (list) | |
2368 | { | |
2369 | if (name == TREE_PURPOSE (list)) | |
2370 | { | |
2371 | tree friends = TREE_VALUE (list); | |
2372 | for (; friends ; friends = TREE_CHAIN (friends)) | |
2373 | { | |
2374 | if (decl == TREE_VALUE (friends)) | |
2375 | { | |
e1cd6e56 | 2376 | cp_warning ("`%D' is already a friend of class `%T'", |
8926095f | 2377 | decl, type); |
e1cd6e56 | 2378 | cp_warning_at ("previous friend declaration of `%D'", |
8926095f | 2379 | TREE_VALUE (friends)); |
8d08fdba MS |
2380 | return; |
2381 | } | |
2382 | } | |
2383 | TREE_VALUE (list) = tree_cons (error_mark_node, decl, | |
2384 | TREE_VALUE (list)); | |
2385 | return; | |
2386 | } | |
2387 | list = TREE_CHAIN (list); | |
2388 | } | |
2389 | DECL_FRIENDLIST (typedecl) | |
2390 | = tree_cons (DECL_NAME (decl), build_tree_list (error_mark_node, decl), | |
2391 | DECL_FRIENDLIST (typedecl)); | |
2392 | if (DECL_NAME (decl) == ansi_opname[(int) MODIFY_EXPR]) | |
2393 | { | |
2394 | tree parmtypes = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
2395 | TYPE_HAS_ASSIGNMENT (TREE_TYPE (typedecl)) = 1; | |
2396 | if (parmtypes && TREE_CHAIN (parmtypes)) | |
2397 | { | |
2398 | tree parmtype = TREE_VALUE (TREE_CHAIN (parmtypes)); | |
2399 | if (TREE_CODE (parmtype) == REFERENCE_TYPE | |
2400 | && TREE_TYPE (parmtypes) == TREE_TYPE (typedecl)) | |
2401 | TYPE_HAS_ASSIGN_REF (TREE_TYPE (typedecl)) = 1; | |
2402 | } | |
2403 | } | |
2404 | } | |
2405 | ||
2406 | /* Declare that every member function NAME in FRIEND_TYPE | |
2407 | (which may be NULL_TREE) is a friend of type TYPE. */ | |
2408 | static void | |
2409 | add_friends (type, name, friend_type) | |
2410 | tree type, name, friend_type; | |
2411 | { | |
2412 | tree typedecl = TYPE_NAME (type); | |
2413 | tree list = DECL_FRIENDLIST (typedecl); | |
2414 | ||
2415 | while (list) | |
2416 | { | |
2417 | if (name == TREE_PURPOSE (list)) | |
2418 | { | |
2419 | tree friends = TREE_VALUE (list); | |
2420 | while (friends && TREE_PURPOSE (friends) != friend_type) | |
2421 | friends = TREE_CHAIN (friends); | |
2422 | if (friends) | |
2423 | if (friend_type) | |
2424 | warning ("method `%s::%s' is already a friend of class", | |
2425 | TYPE_NAME_STRING (friend_type), | |
2426 | IDENTIFIER_POINTER (name)); | |
2427 | else | |
2428 | warning ("function `%s' is already a friend of class `%s'", | |
2429 | IDENTIFIER_POINTER (name), | |
2430 | IDENTIFIER_POINTER (DECL_NAME (typedecl))); | |
2431 | else | |
2432 | TREE_VALUE (list) = tree_cons (friend_type, NULL_TREE, | |
2433 | TREE_VALUE (list)); | |
2434 | return; | |
2435 | } | |
2436 | list = TREE_CHAIN (list); | |
2437 | } | |
2438 | DECL_FRIENDLIST (typedecl) = | |
2439 | tree_cons (name, | |
2440 | build_tree_list (friend_type, NULL_TREE), | |
2441 | DECL_FRIENDLIST (typedecl)); | |
2442 | if (! strncmp (IDENTIFIER_POINTER (name), | |
2443 | IDENTIFIER_POINTER (ansi_opname[(int) MODIFY_EXPR]), | |
2444 | strlen (IDENTIFIER_POINTER (ansi_opname[(int) MODIFY_EXPR])))) | |
2445 | { | |
2446 | TYPE_HAS_ASSIGNMENT (TREE_TYPE (typedecl)) = 1; | |
2447 | sorry ("declaring \"friend operator =\" will not find \"operator = (X&)\" if it exists"); | |
2448 | } | |
2449 | } | |
2450 | ||
2451 | /* Set up a cross reference so that type TYPE will make member function | |
2452 | CTYPE::DECL a friend when CTYPE is finally defined. For more than | |
2453 | one, set up a cross reference so that functions with the name DECL | |
2454 | and type CTYPE know that they are friends of TYPE. */ | |
2455 | static void | |
2456 | xref_friend (type, decl, ctype) | |
2457 | tree type, decl, ctype; | |
2458 | { | |
8d08fdba MS |
2459 | tree friend_decl = TYPE_NAME (ctype); |
2460 | #if 0 | |
8926095f | 2461 | tree typedecl = TYPE_NAME (type); |
8d08fdba MS |
2462 | tree t = tree_cons (NULL_TREE, ctype, DECL_UNDEFINED_FRIENDS (typedecl)); |
2463 | ||
2464 | DECL_UNDEFINED_FRIENDS (typedecl) = t; | |
2465 | #else | |
2466 | tree t = 0; | |
2467 | #endif | |
2468 | SET_DECL_WAITING_FRIENDS (friend_decl, | |
2469 | tree_cons (type, t, | |
2470 | DECL_WAITING_FRIENDS (friend_decl))); | |
2471 | TREE_TYPE (DECL_WAITING_FRIENDS (friend_decl)) = decl; | |
2472 | } | |
2473 | ||
2474 | /* Make FRIEND_TYPE a friend class to TYPE. If FRIEND_TYPE has already | |
2475 | been defined, we make all of its member functions friends of | |
2476 | TYPE. If not, we make it a pending friend, which can later be added | |
2477 | when its definition is seen. If a type is defined, then its TYPE_DECL's | |
2478 | DECL_UNDEFINED_FRIENDS contains a (possibly empty) list of friend | |
2479 | classes that are not defined. If a type has not yet been defined, | |
2480 | then the DECL_WAITING_FRIENDS contains a list of types | |
2481 | waiting to make it their friend. Note that these two can both | |
2482 | be in use at the same time! */ | |
2483 | void | |
2484 | make_friend_class (type, friend_type) | |
2485 | tree type, friend_type; | |
2486 | { | |
2487 | tree classes; | |
2488 | ||
2489 | if (IS_SIGNATURE (type)) | |
2490 | { | |
2491 | error ("`friend' declaration in signature definition"); | |
2492 | return; | |
2493 | } | |
2494 | if (IS_SIGNATURE (friend_type)) | |
2495 | { | |
2496 | error ("signature type `%s' declared `friend'", | |
2497 | IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (friend_type)))); | |
2498 | return; | |
2499 | } | |
2500 | if (type == friend_type) | |
2501 | { | |
b7484fbe | 2502 | pedwarn ("class `%s' is implicitly friends with itself", |
8d08fdba MS |
2503 | TYPE_NAME_STRING (type)); |
2504 | return; | |
2505 | } | |
2506 | ||
2507 | GNU_xref_hier (TYPE_NAME_STRING (type), | |
2508 | TYPE_NAME_STRING (friend_type), 0, 0, 1); | |
2509 | ||
2510 | classes = CLASSTYPE_FRIEND_CLASSES (type); | |
2511 | while (classes && TREE_VALUE (classes) != friend_type) | |
2512 | classes = TREE_CHAIN (classes); | |
2513 | if (classes) | |
2514 | warning ("class `%s' is already friends with class `%s'", | |
2515 | TYPE_NAME_STRING (TREE_VALUE (classes)), TYPE_NAME_STRING (type)); | |
2516 | else | |
2517 | { | |
2518 | CLASSTYPE_FRIEND_CLASSES (type) | |
2519 | = tree_cons (NULL_TREE, friend_type, CLASSTYPE_FRIEND_CLASSES (type)); | |
2520 | } | |
2521 | } | |
2522 | ||
2523 | /* Main friend processor. This is large, and for modularity purposes, | |
2524 | has been removed from grokdeclarator. It returns `void_type_node' | |
2525 | to indicate that something happened, though a FIELD_DECL is | |
2526 | not returned. | |
2527 | ||
2528 | CTYPE is the class this friend belongs to. | |
2529 | ||
2530 | DECLARATOR is the name of the friend. | |
2531 | ||
2532 | DECL is the FUNCTION_DECL that the friend is. | |
2533 | ||
2534 | In case we are parsing a friend which is part of an inline | |
2535 | definition, we will need to store PARM_DECL chain that comes | |
2536 | with it into the DECL_ARGUMENTS slot of the FUNCTION_DECL. | |
2537 | ||
2538 | FLAGS is just used for `grokclassfn'. | |
2539 | ||
2540 | QUALS say what special qualifies should apply to the object | |
2541 | pointed to by `this'. */ | |
2542 | tree | |
2543 | do_friend (ctype, declarator, decl, parmdecls, flags, quals) | |
2544 | tree ctype, declarator, decl, parmdecls; | |
2545 | enum overload_flags flags; | |
2546 | tree quals; | |
2547 | { | |
8d08fdba MS |
2548 | /* Every decl that gets here is a friend of something. */ |
2549 | DECL_FRIEND_P (decl) = 1; | |
2550 | ||
8d08fdba MS |
2551 | if (ctype) |
2552 | { | |
2553 | tree cname = TYPE_NAME (ctype); | |
2554 | if (TREE_CODE (cname) == TYPE_DECL) | |
2555 | cname = DECL_NAME (cname); | |
2556 | ||
2557 | /* A method friend. */ | |
2558 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
2559 | { | |
2560 | if (flags == NO_SPECIAL && ctype && declarator == cname) | |
2561 | DECL_CONSTRUCTOR_P (decl) = 1; | |
2562 | ||
2563 | /* This will set up DECL_ARGUMENTS for us. */ | |
2564 | grokclassfn (ctype, cname, decl, flags, quals); | |
2565 | if (TYPE_SIZE (ctype) != 0) | |
2566 | check_classfn (ctype, cname, decl); | |
2567 | ||
2568 | if (TREE_TYPE (decl) != error_mark_node) | |
2569 | { | |
2570 | if (TYPE_SIZE (ctype)) | |
2571 | { | |
2572 | /* We don't call pushdecl here yet, or ever on this | |
2573 | actual FUNCTION_DECL. We must preserve its TREE_CHAIN | |
2574 | until the end. */ | |
2575 | make_decl_rtl (decl, NULL_PTR, 1); | |
2576 | add_friend (current_class_type, decl); | |
2577 | } | |
2578 | else | |
2579 | { | |
2580 | register char *classname | |
2581 | = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (ctype))); | |
2582 | ||
2583 | error ("member declared as friend before type `%s' defined", | |
2584 | classname); | |
2585 | } | |
2586 | } | |
2587 | } | |
2588 | else | |
2589 | { | |
2590 | /* Possibly a bunch of method friends. */ | |
2591 | ||
2592 | /* Get the class they belong to. */ | |
2593 | tree ctype = IDENTIFIER_TYPE_VALUE (cname); | |
2594 | ||
2595 | /* This class is defined, use its methods now. */ | |
2596 | if (TYPE_SIZE (ctype)) | |
2597 | { | |
2598 | tree fields = lookup_fnfields (TYPE_BINFO (ctype), declarator, 0); | |
2599 | if (fields) | |
2600 | add_friends (current_class_type, declarator, ctype); | |
2601 | else | |
2602 | error ("method `%s' is not a member of class `%s'", | |
2603 | IDENTIFIER_POINTER (declarator), | |
2604 | IDENTIFIER_POINTER (cname)); | |
2605 | } | |
2606 | else | |
2607 | /* Note: DECLARATOR actually has more than one; in this | |
2608 | case, we're making sure that fns with the name DECLARATOR | |
2609 | and type CTYPE know they are friends of the current | |
2610 | class type. */ | |
2611 | xref_friend (current_class_type, declarator, ctype); | |
2612 | decl = void_type_node; | |
2613 | } | |
2614 | } | |
8d08fdba MS |
2615 | else if (TREE_CODE (decl) == FUNCTION_DECL |
2616 | && ((IDENTIFIER_LENGTH (declarator) == 4 | |
2617 | && IDENTIFIER_POINTER (declarator)[0] == 'm' | |
2618 | && ! strcmp (IDENTIFIER_POINTER (declarator), "main")) | |
2619 | || (IDENTIFIER_LENGTH (declarator) > 10 | |
2620 | && IDENTIFIER_POINTER (declarator)[0] == '_' | |
2621 | && IDENTIFIER_POINTER (declarator)[1] == '_' | |
2622 | && strncmp (IDENTIFIER_POINTER (declarator)+2, | |
a3203465 | 2623 | "builtin_", 8) == 0))) |
8d08fdba MS |
2624 | { |
2625 | /* raw "main", and builtin functions never gets overloaded, | |
2626 | but they can become friends. */ | |
8d08fdba MS |
2627 | add_friend (current_class_type, decl); |
2628 | DECL_FRIEND_P (decl) = 1; | |
8d08fdba MS |
2629 | decl = void_type_node; |
2630 | } | |
2631 | /* A global friend. | |
2632 | @@ or possibly a friend from a base class ?!? */ | |
2633 | else if (TREE_CODE (decl) == FUNCTION_DECL) | |
2634 | { | |
2635 | /* Friends must all go through the overload machinery, | |
2636 | even though they may not technically be overloaded. | |
2637 | ||
2638 | Note that because classes all wind up being top-level | |
2639 | in their scope, their friend wind up in top-level scope as well. */ | |
2640 | DECL_ASSEMBLER_NAME (decl) | |
2641 | = build_decl_overload (declarator, TYPE_ARG_TYPES (TREE_TYPE (decl)), | |
2642 | TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE); | |
2643 | DECL_ARGUMENTS (decl) = parmdecls; | |
2644 | DECL_CLASS_CONTEXT (decl) = current_class_type; | |
2645 | ||
2646 | /* We can call pushdecl here, because the TREE_CHAIN of this | |
2647 | FUNCTION_DECL is not needed for other purposes. */ | |
a4443a08 | 2648 | decl = pushdecl (decl); |
8d08fdba MS |
2649 | |
2650 | make_decl_rtl (decl, NULL_PTR, 1); | |
2651 | add_friend (current_class_type, decl); | |
2652 | ||
8d08fdba | 2653 | DECL_FRIEND_P (decl) = 1; |
7177d104 | 2654 | #if 0 |
8d08fdba | 2655 | TREE_OVERLOADED (declarator) = 1; |
7177d104 | 2656 | #endif |
8d08fdba MS |
2657 | } |
2658 | else | |
2659 | { | |
2660 | /* @@ Should be able to ingest later definitions of this function | |
2661 | before use. */ | |
700f8a87 | 2662 | tree decl = lookup_name_nonclass (declarator); |
8d08fdba MS |
2663 | if (decl == NULL_TREE) |
2664 | { | |
2665 | warning ("implicitly declaring `%s' as struct", | |
2666 | IDENTIFIER_POINTER (declarator)); | |
2667 | decl = xref_tag (record_type_node, declarator, NULL_TREE, 1); | |
2668 | decl = TYPE_NAME (decl); | |
2669 | } | |
2670 | ||
2671 | /* Allow abbreviated declarations of overloaded functions, | |
2672 | but not if those functions are really class names. */ | |
2673 | if (TREE_CODE (decl) == TREE_LIST && TREE_TYPE (TREE_PURPOSE (decl))) | |
2674 | { | |
2675 | warning ("`friend %s' archaic, use `friend class %s' instead", | |
2676 | IDENTIFIER_POINTER (declarator), | |
2677 | IDENTIFIER_POINTER (declarator)); | |
2678 | decl = TREE_TYPE (TREE_PURPOSE (decl)); | |
2679 | } | |
2680 | ||
2681 | if (TREE_CODE (decl) == TREE_LIST) | |
2682 | add_friends (current_class_type, TREE_PURPOSE (decl), NULL_TREE); | |
2683 | else | |
2684 | make_friend_class (current_class_type, TREE_TYPE (decl)); | |
2685 | decl = void_type_node; | |
2686 | } | |
2687 | return decl; | |
2688 | } | |
2689 | ||
2690 | /* TYPE has now been defined. It may, however, have a number of things | |
2691 | waiting make make it their friend. We resolve these references | |
2692 | here. */ | |
2693 | void | |
2694 | embrace_waiting_friends (type) | |
2695 | tree type; | |
2696 | { | |
2697 | tree decl = TYPE_NAME (type); | |
2698 | tree waiters; | |
2699 | ||
2700 | if (TREE_CODE (decl) != TYPE_DECL) | |
2701 | return; | |
2702 | ||
2703 | for (waiters = DECL_WAITING_FRIENDS (decl); waiters; | |
2704 | waiters = TREE_CHAIN (waiters)) | |
2705 | { | |
2706 | tree waiter = TREE_PURPOSE (waiters); | |
2707 | #if 0 | |
2708 | tree waiter_prev = TREE_VALUE (waiters); | |
2709 | #endif | |
2710 | tree decl = TREE_TYPE (waiters); | |
2711 | tree name = decl ? (TREE_CODE (decl) == IDENTIFIER_NODE | |
2712 | ? decl : DECL_NAME (decl)) : NULL_TREE; | |
2713 | if (name) | |
2714 | { | |
2715 | /* @@ There may be work to be done since we have not verified | |
2716 | @@ consistency between original and friend declarations | |
2717 | @@ of the functions waiting to become friends. */ | |
2718 | tree field = lookup_fnfields (TYPE_BINFO (type), name, 0); | |
2719 | if (field) | |
2720 | if (decl == name) | |
2721 | add_friends (waiter, name, type); | |
2722 | else | |
2723 | add_friend (waiter, decl); | |
2724 | else | |
2725 | error_with_file_and_line (DECL_SOURCE_FILE (TYPE_NAME (waiter)), | |
2726 | DECL_SOURCE_LINE (TYPE_NAME (waiter)), | |
2727 | "no method `%s' defined in class `%s' to be friend", | |
2728 | IDENTIFIER_POINTER (DECL_NAME (TREE_TYPE (waiters))), | |
2729 | TYPE_NAME_STRING (type)); | |
2730 | } | |
2731 | else | |
2732 | make_friend_class (type, waiter); | |
2733 | ||
2734 | #if 0 | |
2735 | if (TREE_CHAIN (waiter_prev)) | |
2736 | TREE_CHAIN (waiter_prev) = TREE_CHAIN (TREE_CHAIN (waiter_prev)); | |
2737 | else | |
2738 | DECL_UNDEFINED_FRIENDS (TYPE_NAME (waiter)) = NULL_TREE; | |
2739 | #endif | |
2740 | } | |
2741 | } | |
2742 | \f | |
2743 | /* Common subroutines of build_new and build_vec_delete. */ | |
2744 | ||
2745 | /* Common interface for calling "builtin" functions that are not | |
2746 | really builtin. */ | |
2747 | ||
2748 | tree | |
2749 | build_builtin_call (type, node, arglist) | |
2750 | tree type; | |
2751 | tree node; | |
2752 | tree arglist; | |
2753 | { | |
2754 | tree rval = build (CALL_EXPR, type, node, arglist, 0); | |
2755 | TREE_SIDE_EFFECTS (rval) = 1; | |
2756 | assemble_external (TREE_OPERAND (node, 0)); | |
2757 | TREE_USED (TREE_OPERAND (node, 0)) = 1; | |
2758 | return rval; | |
2759 | } | |
2760 | \f | |
2761 | /* Generate a C++ "new" expression. DECL is either a TREE_LIST | |
2762 | (which needs to go through some sort of groktypename) or it | |
2763 | is the name of the class we are newing. INIT is an initialization value. | |
2764 | It is either an EXPRLIST, an EXPR_NO_COMMAS, or something in braces. | |
2765 | If INIT is void_type_node, it means do *not* call a constructor | |
2766 | for this instance. | |
2767 | ||
2768 | For types with constructors, the data returned is initialized | |
2769 | by the appropriate constructor. | |
2770 | ||
2771 | Whether the type has a constructor or not, if it has a pointer | |
2772 | to a virtual function table, then that pointer is set up | |
2773 | here. | |
2774 | ||
2775 | Unless I am mistaken, a call to new () will return initialized | |
2776 | data regardless of whether the constructor itself is private or | |
8926095f | 2777 | not. NOPE; new fails if the constructor is private (jcm). |
8d08fdba MS |
2778 | |
2779 | Note that build_new does nothing to assure that any special | |
2780 | alignment requirements of the type are met. Rather, it leaves | |
2781 | it up to malloc to do the right thing. Otherwise, folding to | |
2782 | the right alignment cal cause problems if the user tries to later | |
2783 | free the memory returned by `new'. | |
2784 | ||
2785 | PLACEMENT is the `placement' list for user-defined operator new (). */ | |
2786 | ||
d18c083e MS |
2787 | extern int flag_check_new; |
2788 | ||
8d08fdba MS |
2789 | tree |
2790 | build_new (placement, decl, init, use_global_new) | |
2791 | tree placement; | |
2792 | tree decl, init; | |
2793 | int use_global_new; | |
2794 | { | |
2795 | tree type, true_type, size, rval; | |
8926095f | 2796 | tree nelts; |
b7484fbe | 2797 | tree alloc_expr, alloc_temp; |
8926095f | 2798 | int has_array = 0; |
a28e3c7f | 2799 | enum tree_code code = NEW_EXPR; |
8d08fdba MS |
2800 | |
2801 | tree pending_sizes = NULL_TREE; | |
2802 | ||
2803 | if (decl == error_mark_node) | |
2804 | return error_mark_node; | |
2805 | ||
2806 | if (TREE_CODE (decl) == TREE_LIST) | |
2807 | { | |
2808 | tree absdcl = TREE_VALUE (decl); | |
2809 | tree last_absdcl = NULL_TREE; | |
2810 | int old_immediate_size_expand; | |
2811 | ||
2812 | if (current_function_decl | |
2813 | && DECL_CONSTRUCTOR_P (current_function_decl)) | |
2814 | { | |
2815 | old_immediate_size_expand = immediate_size_expand; | |
2816 | immediate_size_expand = 0; | |
2817 | } | |
2818 | ||
2819 | nelts = integer_one_node; | |
2820 | ||
2821 | if (absdcl && TREE_CODE (absdcl) == CALL_EXPR) | |
8926095f | 2822 | my_friendly_abort (215); |
8d08fdba MS |
2823 | while (absdcl && TREE_CODE (absdcl) == INDIRECT_REF) |
2824 | { | |
2825 | last_absdcl = absdcl; | |
2826 | absdcl = TREE_OPERAND (absdcl, 0); | |
2827 | } | |
2828 | ||
2829 | if (absdcl && TREE_CODE (absdcl) == ARRAY_REF) | |
2830 | { | |
2831 | /* probably meant to be a vec new */ | |
2832 | tree this_nelts; | |
2833 | ||
51c184be MS |
2834 | while (TREE_OPERAND (absdcl, 0) |
2835 | && TREE_CODE (TREE_OPERAND (absdcl, 0)) == ARRAY_REF) | |
2836 | { | |
2837 | last_absdcl = absdcl; | |
2838 | absdcl = TREE_OPERAND (absdcl, 0); | |
2839 | } | |
2840 | ||
8d08fdba MS |
2841 | has_array = 1; |
2842 | this_nelts = TREE_OPERAND (absdcl, 1); | |
2843 | if (this_nelts != error_mark_node) | |
2844 | { | |
2845 | if (this_nelts == NULL_TREE) | |
2846 | error ("new of array type fails to specify size"); | |
2847 | else | |
2848 | { | |
8926095f | 2849 | this_nelts = save_expr (convert (sizetype, this_nelts)); |
8d08fdba MS |
2850 | absdcl = TREE_OPERAND (absdcl, 0); |
2851 | if (this_nelts == integer_zero_node) | |
2852 | { | |
2853 | warning ("zero size array reserves no space"); | |
2854 | nelts = integer_zero_node; | |
2855 | } | |
2856 | else | |
2857 | nelts = build_binary_op (MULT_EXPR, nelts, this_nelts, 1); | |
2858 | } | |
2859 | } | |
2860 | else | |
2861 | nelts = integer_zero_node; | |
2862 | } | |
2863 | ||
2864 | if (last_absdcl) | |
2865 | TREE_OPERAND (last_absdcl, 0) = absdcl; | |
2866 | else | |
2867 | TREE_VALUE (decl) = absdcl; | |
2868 | ||
2869 | type = true_type = groktypename (decl); | |
8926095f | 2870 | if (! type || type == error_mark_node) |
8d08fdba MS |
2871 | { |
2872 | immediate_size_expand = old_immediate_size_expand; | |
2873 | return error_mark_node; | |
2874 | } | |
2875 | ||
8d08fdba MS |
2876 | if (current_function_decl |
2877 | && DECL_CONSTRUCTOR_P (current_function_decl)) | |
2878 | { | |
2879 | pending_sizes = get_pending_sizes (); | |
2880 | immediate_size_expand = old_immediate_size_expand; | |
2881 | } | |
2882 | } | |
2883 | else if (TREE_CODE (decl) == IDENTIFIER_NODE) | |
2884 | { | |
2885 | if (IDENTIFIER_HAS_TYPE_VALUE (decl)) | |
2886 | { | |
2887 | /* An aggregate type. */ | |
2888 | type = IDENTIFIER_TYPE_VALUE (decl); | |
2889 | decl = TYPE_NAME (type); | |
2890 | } | |
2891 | else | |
2892 | { | |
2893 | /* A builtin type. */ | |
2894 | decl = lookup_name (decl, 1); | |
2895 | my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 215); | |
2896 | type = TREE_TYPE (decl); | |
2897 | } | |
2898 | true_type = type; | |
2899 | } | |
2900 | else if (TREE_CODE (decl) == TYPE_DECL) | |
2901 | { | |
2902 | type = TREE_TYPE (decl); | |
2903 | true_type = type; | |
2904 | } | |
2905 | else | |
2906 | { | |
2907 | type = decl; | |
2908 | true_type = type; | |
2909 | decl = TYPE_NAME (type); | |
2910 | } | |
2911 | ||
8926095f MS |
2912 | /* ``A reference cannot be created by the new operator. A reference |
2913 | is not an object (8.2.2, 8.4.3), so a pointer to it could not be | |
2914 | returned by new.'' ARM 5.3.3 */ | |
2915 | if (TREE_CODE (type) == REFERENCE_TYPE) | |
8d08fdba | 2916 | { |
8926095f MS |
2917 | error ("new cannot be applied to a reference type"); |
2918 | type = true_type = TREE_TYPE (type); | |
8d08fdba MS |
2919 | } |
2920 | ||
b7484fbe MS |
2921 | if (TREE_CODE (type) == FUNCTION_TYPE) |
2922 | { | |
2923 | error ("new cannot be applied to a function type"); | |
2924 | return error_mark_node; | |
2925 | } | |
2926 | ||
8926095f MS |
2927 | /* When the object being created is an array, the new-expression yields a |
2928 | pointer to the initial element (if any) of the array. For example, | |
2929 | both new int and new int[10] return an int*. 5.3.4. */ | |
2930 | if (TREE_CODE (type) == ARRAY_TYPE && has_array == 0) | |
8d08fdba | 2931 | { |
8926095f MS |
2932 | nelts = array_type_nelts_top (type); |
2933 | has_array = 1; | |
2934 | type = true_type = TREE_TYPE (type); | |
8d08fdba MS |
2935 | } |
2936 | ||
8926095f | 2937 | if (TYPE_READONLY (type) || TYPE_VOLATILE (type)) |
8ccc31eb MS |
2938 | type = TYPE_MAIN_VARIANT (type); |
2939 | ||
8d08fdba MS |
2940 | /* If our base type is an array, then make sure we know how many elements |
2941 | it has. */ | |
2942 | while (TREE_CODE (true_type) == ARRAY_TYPE) | |
2943 | { | |
2944 | tree this_nelts = array_type_nelts_top (true_type); | |
8926095f | 2945 | nelts = build_binary_op (MULT_EXPR, nelts, this_nelts, 1); |
8d08fdba MS |
2946 | true_type = TREE_TYPE (true_type); |
2947 | } | |
2948 | if (has_array) | |
2949 | size = fold (build_binary_op (MULT_EXPR, size_in_bytes (true_type), | |
2950 | nelts, 1)); | |
2951 | else | |
2952 | size = size_in_bytes (type); | |
2953 | ||
e1cd6e56 MS |
2954 | if (true_type == void_type_node) |
2955 | { | |
b7484fbe | 2956 | error ("invalid type `void' for new"); |
e1cd6e56 MS |
2957 | return error_mark_node; |
2958 | } | |
2959 | ||
8926095f MS |
2960 | if (TYPE_SIZE (true_type) == 0) |
2961 | { | |
e1cd6e56 | 2962 | incomplete_type_error (0, true_type); |
8926095f MS |
2963 | return error_mark_node; |
2964 | } | |
2965 | ||
2966 | if (TYPE_LANG_SPECIFIC (true_type) | |
2967 | && CLASSTYPE_ABSTRACT_VIRTUALS (true_type)) | |
2968 | { | |
2969 | abstract_virtuals_error (NULL_TREE, true_type); | |
2970 | return error_mark_node; | |
2971 | } | |
2972 | ||
2973 | if (TYPE_LANG_SPECIFIC (true_type) && IS_SIGNATURE (true_type)) | |
2974 | { | |
2975 | signature_error (NULL_TREE, true_type); | |
2976 | return error_mark_node; | |
2977 | } | |
8d08fdba MS |
2978 | |
2979 | /* Get a little extra space to store a couple of things before the new'ed | |
2980 | array. */ | |
a28e3c7f | 2981 | if (has_array && TYPE_VEC_NEW_USES_COOKIE (true_type)) |
8d08fdba MS |
2982 | { |
2983 | tree extra = BI_header_size; | |
2984 | ||
2985 | size = size_binop (PLUS_EXPR, size, extra); | |
2986 | } | |
2987 | ||
a28e3c7f MS |
2988 | if (has_array) |
2989 | code = VEC_NEW_EXPR; | |
2990 | ||
8d08fdba | 2991 | /* Allocate the object. */ |
a28e3c7f MS |
2992 | if (! use_global_new && TYPE_LANG_SPECIFIC (true_type) |
2993 | && (TYPE_GETS_NEW (true_type) & (1 << has_array))) | |
2994 | rval = build_opfncall (code, LOOKUP_NORMAL, | |
8d08fdba MS |
2995 | TYPE_POINTER_TO (true_type), size, placement); |
2996 | else if (placement) | |
2997 | { | |
a28e3c7f | 2998 | rval = build_opfncall (code, LOOKUP_GLOBAL|LOOKUP_COMPLAIN, |
8d08fdba | 2999 | ptr_type_node, size, placement); |
71851aaa | 3000 | rval = convert (build_pointer_type (true_type), rval); |
8d08fdba | 3001 | } |
a28e3c7f | 3002 | else if (! has_array && flag_this_is_variable > 0 |
8ccc31eb | 3003 | && TYPE_NEEDS_CONSTRUCTING (true_type) && init != void_type_node) |
8d08fdba MS |
3004 | { |
3005 | if (init == NULL_TREE || TREE_CODE (init) == TREE_LIST) | |
3006 | rval = NULL_TREE; | |
3007 | else | |
3008 | { | |
3009 | error ("constructors take parameter lists"); | |
3010 | return error_mark_node; | |
3011 | } | |
3012 | } | |
3013 | else | |
3014 | { | |
3015 | rval = build_builtin_call (build_pointer_type (true_type), | |
a28e3c7f MS |
3016 | has_array ? BIVN : BIN, |
3017 | build_tree_list (NULL_TREE, size)); | |
8d08fdba MS |
3018 | #if 0 |
3019 | /* See comment above as to why this is disabled. */ | |
3020 | if (alignment) | |
3021 | { | |
3022 | rval = build (PLUS_EXPR, TYPE_POINTER_TO (true_type), rval, | |
3023 | alignment); | |
3024 | rval = build (BIT_AND_EXPR, TYPE_POINTER_TO (true_type), | |
3025 | rval, build1 (BIT_NOT_EXPR, integer_type_node, | |
3026 | alignment)); | |
3027 | } | |
3028 | #endif | |
3029 | TREE_CALLS_NEW (rval) = 1; | |
8d08fdba MS |
3030 | } |
3031 | ||
b7484fbe | 3032 | if (flag_check_new && rval) |
d18c083e | 3033 | { |
b7484fbe MS |
3034 | /* For array new, we need to make sure that the call to new is |
3035 | not expanded as part of the RTL_EXPR for the initialization, | |
3036 | so we can't just use save_expr here. */ | |
3037 | ||
3038 | alloc_temp = get_temp_name (TREE_TYPE (rval), 0); | |
3039 | alloc_expr = build (MODIFY_EXPR, TREE_TYPE (rval), alloc_temp, rval); | |
3040 | TREE_SIDE_EFFECTS (alloc_expr) = 1; | |
3041 | rval = alloc_temp; | |
d18c083e | 3042 | } |
b7484fbe MS |
3043 | else |
3044 | alloc_expr = NULL_TREE; | |
d18c083e | 3045 | |
8d08fdba MS |
3046 | /* if rval is NULL_TREE I don't have to allocate it, but are we totally |
3047 | sure we have some extra bytes in that case for the BI_header_size | |
3048 | cookies? And how does that interact with the code below? (mrs) */ | |
3049 | /* Finish up some magic for new'ed arrays */ | |
a28e3c7f | 3050 | if (has_array && TYPE_VEC_NEW_USES_COOKIE (true_type) && rval != NULL_TREE) |
8d08fdba MS |
3051 | { |
3052 | tree extra = BI_header_size; | |
3053 | tree cookie, exp1; | |
3054 | rval = convert (ptr_type_node, rval); /* convert to void * first */ | |
3055 | rval = convert (string_type_node, rval); /* lets not add void* and ints */ | |
3056 | rval = save_expr (build_binary_op (PLUS_EXPR, rval, extra, 1)); | |
3057 | /* Store header info. */ | |
3058 | cookie = build_indirect_ref (build (MINUS_EXPR, TYPE_POINTER_TO (BI_header_type), | |
3059 | rval, extra), NULL_PTR); | |
3060 | exp1 = build (MODIFY_EXPR, void_type_node, | |
3061 | build_component_ref (cookie, nc_nelts_field_id, 0, 0), | |
3062 | nelts); | |
3063 | TREE_SIDE_EFFECTS (exp1) = 1; | |
3064 | rval = convert (build_pointer_type (true_type), rval); | |
3065 | TREE_CALLS_NEW (rval) = 1; | |
3066 | TREE_SIDE_EFFECTS (rval) = 1; | |
3067 | rval = build_compound_expr (tree_cons (NULL_TREE, exp1, | |
3068 | build_tree_list (NULL_TREE, rval))); | |
3069 | } | |
3070 | ||
8d08fdba MS |
3071 | if (rval == error_mark_node) |
3072 | return error_mark_node; | |
8d08fdba MS |
3073 | |
3074 | /* Don't call any constructors or do any initialization. */ | |
3075 | if (init == void_type_node) | |
3076 | goto done; | |
3077 | ||
8926095f | 3078 | if (TYPE_NEEDS_CONSTRUCTING (type) || init) |
8d08fdba | 3079 | { |
b19b4a78 MS |
3080 | if (! TYPE_NEEDS_CONSTRUCTING (type) |
3081 | && ! IS_AGGR_TYPE (type) && ! has_array) | |
8d08fdba MS |
3082 | { |
3083 | /* New 2.0 interpretation: `new int (10)' means | |
3084 | allocate an int, and initialize it with 10. */ | |
8ccc31eb MS |
3085 | tree deref; |
3086 | ||
3087 | rval = save_expr (rval); | |
3088 | deref = build_indirect_ref (rval, NULL_PTR); | |
3089 | TREE_READONLY (deref) = 0; | |
8d08fdba | 3090 | |
8ccc31eb MS |
3091 | if (TREE_CHAIN (init) != NULL_TREE) |
3092 | pedwarn ("initializer list being treated as compound expression"); | |
7215f9a0 MS |
3093 | else if (TREE_CODE (init) == CONSTRUCTOR) |
3094 | { | |
3095 | pedwarn ("initializer list appears where operand should be used"); | |
3096 | init = TREE_OPERAND (init, 1); | |
3097 | } | |
8ccc31eb MS |
3098 | init = build_compound_expr (init); |
3099 | ||
3100 | init = convert_for_initialization (deref, type, init, LOOKUP_NORMAL, | |
3101 | "new", NULL_TREE, 0); | |
8d08fdba | 3102 | rval = build (COMPOUND_EXPR, TREE_TYPE (rval), |
8ccc31eb | 3103 | build_modify_expr (deref, NOP_EXPR, init), |
8d08fdba | 3104 | rval); |
e3417fcd | 3105 | TREE_NO_UNUSED_WARNING (rval) = 1; |
8d08fdba MS |
3106 | TREE_SIDE_EFFECTS (rval) = 1; |
3107 | TREE_CALLS_NEW (rval) = 1; | |
3108 | } | |
8ccc31eb MS |
3109 | else if (! has_array) |
3110 | { | |
3111 | tree newrval; | |
3112 | /* Constructors are never virtual. If it has an initialization, we | |
3113 | need to complain if we aren't allowed to use the ctor that took | |
3114 | that argument. */ | |
3115 | int flags = LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_COMPLAIN; | |
3116 | ||
3117 | if (rval && TYPE_USES_VIRTUAL_BASECLASSES (true_type)) | |
3118 | { | |
3119 | init = tree_cons (NULL_TREE, integer_one_node, init); | |
3120 | flags |= LOOKUP_HAS_IN_CHARGE; | |
3121 | } | |
3122 | ||
3123 | newrval = rval; | |
3124 | ||
3125 | if (newrval && TREE_CODE (TREE_TYPE (newrval)) == POINTER_TYPE) | |
3126 | newrval = build_indirect_ref (newrval, NULL_PTR); | |
3127 | ||
3128 | newrval = build_method_call (newrval, constructor_name_full (true_type), | |
3129 | init, NULL_TREE, flags); | |
3130 | ||
3131 | if (newrval) | |
3132 | { | |
3133 | rval = newrval; | |
3134 | TREE_HAS_CONSTRUCTOR (rval) = 1; | |
3135 | } | |
3136 | else | |
3137 | rval = error_mark_node; | |
3138 | } | |
8d08fdba MS |
3139 | else if (current_function_decl == NULL_TREE) |
3140 | { | |
3141 | extern tree static_aggregates; | |
3142 | ||
3143 | /* In case of static initialization, SAVE_EXPR is good enough. */ | |
8ccc31eb | 3144 | rval = save_expr (rval); |
8d08fdba MS |
3145 | init = copy_to_permanent (init); |
3146 | rval = copy_to_permanent (rval); | |
3147 | static_aggregates = perm_tree_cons (init, rval, static_aggregates); | |
3148 | } | |
3149 | else | |
3150 | { | |
3151 | /* Have to wrap this in RTL_EXPR for two cases: | |
3152 | in base or member initialization and if we | |
3153 | are a branch of a ?: operator. Since we | |
3154 | can't easily know the latter, just do it always. */ | |
3155 | tree xval = make_node (RTL_EXPR); | |
3156 | ||
7215f9a0 MS |
3157 | /* If we want to check the value of the allocation expression, |
3158 | and the number of elements in the array is not a constant, we | |
3159 | *must* expand the SAVE_EXPR for nelts in alloc_expr before we | |
3160 | expand it in the actual initalization. So we need to build up | |
3161 | an RTL_EXPR for alloc_expr. Sigh. */ | |
3162 | if (alloc_expr && ! TREE_CONSTANT (nelts)) | |
3163 | { | |
3164 | tree xval = make_node (RTL_EXPR); | |
3165 | rtx rtxval; | |
3166 | TREE_TYPE (xval) = TREE_TYPE (alloc_expr); | |
3167 | do_pending_stack_adjust (); | |
3168 | start_sequence_for_rtl_expr (xval); | |
3169 | emit_note (0, -1); | |
3170 | rtxval = expand_expr (alloc_expr, NULL, VOIDmode, 0); | |
3171 | do_pending_stack_adjust (); | |
3172 | TREE_SIDE_EFFECTS (xval) = 1; | |
3173 | RTL_EXPR_SEQUENCE (xval) = get_insns (); | |
3174 | end_sequence (); | |
3175 | RTL_EXPR_RTL (xval) = rtxval; | |
3176 | TREE_TYPE (xval) = TREE_TYPE (alloc_expr); | |
3177 | alloc_expr = xval; | |
3178 | } | |
3179 | ||
8d08fdba MS |
3180 | TREE_TYPE (xval) = TREE_TYPE (rval); |
3181 | do_pending_stack_adjust (); | |
3182 | start_sequence_for_rtl_expr (xval); | |
3183 | ||
3184 | /* As a matter of principle, `start_sequence' should do this. */ | |
3185 | emit_note (0, -1); | |
3186 | ||
8ccc31eb MS |
3187 | rval = save_expr (rval); |
3188 | rval = expand_vec_init (decl, rval, | |
3189 | build_binary_op (MINUS_EXPR, nelts, | |
3190 | integer_one_node, 1), | |
3191 | init, 0); | |
8d08fdba MS |
3192 | |
3193 | do_pending_stack_adjust (); | |
3194 | ||
3195 | TREE_SIDE_EFFECTS (xval) = 1; | |
3196 | TREE_CALLS_NEW (xval) = 1; | |
3197 | RTL_EXPR_SEQUENCE (xval) = get_insns (); | |
3198 | end_sequence (); | |
3199 | ||
3200 | if (TREE_CODE (rval) == SAVE_EXPR) | |
3201 | { | |
3202 | /* Errors may cause this to not get evaluated. */ | |
3203 | if (SAVE_EXPR_RTL (rval) == 0) | |
3204 | SAVE_EXPR_RTL (rval) = const0_rtx; | |
3205 | RTL_EXPR_RTL (xval) = SAVE_EXPR_RTL (rval); | |
3206 | } | |
3207 | else | |
3208 | { | |
3209 | my_friendly_assert (TREE_CODE (rval) == VAR_DECL, 217); | |
3210 | RTL_EXPR_RTL (xval) = DECL_RTL (rval); | |
3211 | } | |
3212 | rval = xval; | |
3213 | } | |
3214 | } | |
8ccc31eb MS |
3215 | else if (TYPE_READONLY (true_type)) |
3216 | cp_error ("uninitialized const in `new' of `%#T'", true_type); | |
3217 | ||
8d08fdba | 3218 | done: |
d18c083e | 3219 | |
b7484fbe | 3220 | if (alloc_expr) |
d18c083e | 3221 | { |
b7484fbe MS |
3222 | /* Did we modify the storage? */ |
3223 | if (rval != alloc_temp) | |
3224 | { | |
3225 | tree ifexp = build_binary_op (NE_EXPR, alloc_expr, | |
3226 | integer_zero_node, 1); | |
3227 | rval = build_conditional_expr (ifexp, rval, alloc_temp); | |
3228 | } | |
3229 | else | |
3230 | rval = alloc_expr; | |
d18c083e MS |
3231 | } |
3232 | ||
51c184be MS |
3233 | if (rval && TREE_TYPE (rval) != build_pointer_type (type)) |
3234 | { | |
3235 | /* The type of new int [3][3] is not int *, but int [3] * */ | |
6060a796 | 3236 | rval = build_c_cast (build_pointer_type (type), rval, 0); |
51c184be MS |
3237 | } |
3238 | ||
8d08fdba MS |
3239 | if (pending_sizes) |
3240 | rval = build_compound_expr (chainon (pending_sizes, | |
3241 | build_tree_list (NULL_TREE, rval))); | |
3242 | ||
3243 | if (flag_gc) | |
3244 | { | |
3245 | extern tree gc_visible; | |
3246 | tree objbits; | |
3247 | tree update_expr; | |
3248 | ||
3249 | rval = save_expr (rval); | |
3250 | /* We don't need a `headof' operation to do this because | |
3251 | we know where the object starts. */ | |
3252 | objbits = build1 (INDIRECT_REF, unsigned_type_node, | |
3253 | build (MINUS_EXPR, ptr_type_node, | |
3254 | rval, c_sizeof_nowarn (unsigned_type_node))); | |
3255 | update_expr = build_modify_expr (objbits, BIT_IOR_EXPR, gc_visible); | |
3256 | rval = build_compound_expr (tree_cons (NULL_TREE, rval, | |
3257 | tree_cons (NULL_TREE, update_expr, | |
3258 | build_tree_list (NULL_TREE, rval)))); | |
3259 | } | |
3260 | ||
00595019 | 3261 | return rval; |
8d08fdba MS |
3262 | } |
3263 | \f | |
3264 | /* `expand_vec_init' performs initialization of a vector of aggregate | |
3265 | types. | |
3266 | ||
3267 | DECL is passed only for error reporting, and provides line number | |
3268 | and source file name information. | |
3269 | BASE is the space where the vector will be. | |
3270 | MAXINDEX is the maximum index of the array (one less than the | |
3271 | number of elements). | |
3272 | INIT is the (possibly NULL) initializer. | |
3273 | ||
3274 | FROM_ARRAY is 0 if we should init everything with INIT | |
3275 | (i.e., every element initialized from INIT). | |
3276 | FROM_ARRAY is 1 if we should index into INIT in parallel | |
3277 | with initialization of DECL. | |
3278 | FROM_ARRAY is 2 if we should index into INIT in parallel, | |
3279 | but use assignment instead of initialization. */ | |
3280 | ||
3281 | tree | |
3282 | expand_vec_init (decl, base, maxindex, init, from_array) | |
3283 | tree decl, base, maxindex, init; | |
3284 | int from_array; | |
3285 | { | |
3286 | tree rval; | |
3287 | tree iterator, base2 = NULL_TREE; | |
3288 | tree type = TREE_TYPE (TREE_TYPE (base)); | |
3289 | tree size; | |
3290 | ||
3291 | maxindex = convert (integer_type_node, maxindex); | |
3292 | if (maxindex == error_mark_node) | |
3293 | return error_mark_node; | |
3294 | ||
3295 | if (current_function_decl == NULL_TREE) | |
3296 | { | |
3297 | rval = make_tree_vec (3); | |
3298 | TREE_VEC_ELT (rval, 0) = base; | |
3299 | TREE_VEC_ELT (rval, 1) = maxindex; | |
3300 | TREE_VEC_ELT (rval, 2) = init; | |
3301 | return rval; | |
3302 | } | |
3303 | ||
3304 | size = size_in_bytes (type); | |
3305 | ||
3306 | /* Set to zero in case size is <= 0. Optimizer will delete this if | |
3307 | it is not needed. */ | |
3308 | rval = get_temp_regvar (TYPE_POINTER_TO (type), | |
3309 | convert (TYPE_POINTER_TO (type), null_pointer_node)); | |
3310 | base = default_conversion (base); | |
3311 | base = convert (TYPE_POINTER_TO (type), base); | |
3312 | expand_assignment (rval, base, 0, 0); | |
3313 | base = get_temp_regvar (TYPE_POINTER_TO (type), base); | |
3314 | ||
3315 | if (init != NULL_TREE | |
3316 | && TREE_CODE (init) == CONSTRUCTOR | |
3317 | && TREE_TYPE (init) == TREE_TYPE (decl)) | |
3318 | { | |
3319 | /* Initialization of array from {...}. */ | |
3320 | tree elts = CONSTRUCTOR_ELTS (init); | |
3321 | tree baseref = build1 (INDIRECT_REF, type, base); | |
3322 | tree baseinc = build (PLUS_EXPR, TYPE_POINTER_TO (type), base, size); | |
3323 | int host_i = TREE_INT_CST_LOW (maxindex); | |
3324 | ||
3325 | if (IS_AGGR_TYPE (type)) | |
3326 | { | |
3327 | while (elts) | |
3328 | { | |
3329 | host_i -= 1; | |
6060a796 | 3330 | expand_aggr_init (baseref, TREE_VALUE (elts), 0, 0); |
8d08fdba MS |
3331 | |
3332 | expand_assignment (base, baseinc, 0, 0); | |
3333 | elts = TREE_CHAIN (elts); | |
3334 | } | |
3335 | /* Initialize any elements by default if possible. */ | |
3336 | if (host_i >= 0) | |
3337 | { | |
3338 | if (TYPE_NEEDS_CONSTRUCTING (type) == 0) | |
3339 | { | |
3340 | if (obey_regdecls) | |
3341 | use_variable (DECL_RTL (base)); | |
3342 | goto done_init; | |
3343 | } | |
3344 | ||
3345 | iterator = get_temp_regvar (integer_type_node, | |
3346 | build_int_2 (host_i, 0)); | |
3347 | init = NULL_TREE; | |
3348 | goto init_by_default; | |
3349 | } | |
3350 | } | |
3351 | else | |
3352 | while (elts) | |
3353 | { | |
3354 | expand_assignment (baseref, TREE_VALUE (elts), 0, 0); | |
3355 | ||
3356 | expand_assignment (base, baseinc, 0, 0); | |
3357 | elts = TREE_CHAIN (elts); | |
3358 | } | |
3359 | ||
3360 | if (obey_regdecls) | |
3361 | use_variable (DECL_RTL (base)); | |
3362 | } | |
3363 | else | |
3364 | { | |
3365 | tree itype; | |
3366 | ||
3367 | iterator = get_temp_regvar (integer_type_node, maxindex); | |
3368 | ||
3369 | init_by_default: | |
3370 | ||
3371 | /* If initializing one array from another, | |
3372 | initialize element by element. */ | |
3373 | if (from_array) | |
3374 | { | |
3375 | /* We rely upon the below calls the do argument checking */ | |
3376 | if (decl == NULL_TREE) | |
3377 | { | |
3378 | sorry ("initialization of array from dissimilar array type"); | |
3379 | return error_mark_node; | |
3380 | } | |
3381 | if (init) | |
3382 | { | |
3383 | base2 = default_conversion (init); | |
3384 | itype = TREE_TYPE (base2); | |
3385 | base2 = get_temp_regvar (itype, base2); | |
3386 | itype = TREE_TYPE (itype); | |
3387 | } | |
3388 | else if (TYPE_LANG_SPECIFIC (type) | |
3389 | && TYPE_NEEDS_CONSTRUCTING (type) | |
3390 | && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) | |
3391 | { | |
3392 | error ("initializer ends prematurely"); | |
3393 | return error_mark_node; | |
3394 | } | |
3395 | } | |
3396 | ||
b7484fbe | 3397 | expand_start_cond (build (GE_EXPR, boolean_type_node, |
8d08fdba MS |
3398 | iterator, integer_zero_node), 0); |
3399 | expand_start_loop_continue_elsewhere (1); | |
3400 | ||
3401 | if (from_array) | |
3402 | { | |
3403 | tree to = build1 (INDIRECT_REF, type, base); | |
3404 | tree from; | |
3405 | ||
3406 | if (base2) | |
3407 | from = build1 (INDIRECT_REF, itype, base2); | |
3408 | else | |
3409 | from = NULL_TREE; | |
3410 | ||
3411 | if (from_array == 2) | |
3412 | expand_expr_stmt (build_modify_expr (to, NOP_EXPR, from)); | |
3413 | else if (TYPE_NEEDS_CONSTRUCTING (type)) | |
6060a796 | 3414 | expand_aggr_init (to, from, 0, 0); |
8d08fdba MS |
3415 | else if (from) |
3416 | expand_assignment (to, from, 0, 0); | |
3417 | else | |
3418 | my_friendly_abort (57); | |
3419 | } | |
3420 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
3421 | { | |
3422 | if (init != 0) | |
3423 | sorry ("cannot initialize multi-dimensional array with initializer"); | |
3424 | expand_vec_init (decl, build1 (NOP_EXPR, TYPE_POINTER_TO (TREE_TYPE (type)), base), | |
3425 | array_type_nelts (type), 0, 0); | |
3426 | } | |
3427 | else | |
6060a796 | 3428 | expand_aggr_init (build1 (INDIRECT_REF, type, base), init, 0, 0); |
8d08fdba MS |
3429 | |
3430 | expand_assignment (base, | |
3431 | build (PLUS_EXPR, TYPE_POINTER_TO (type), base, size), | |
3432 | 0, 0); | |
3433 | if (base2) | |
3434 | expand_assignment (base2, | |
3435 | build (PLUS_EXPR, TYPE_POINTER_TO (type), base2, size), 0, 0); | |
3436 | expand_loop_continue_here (); | |
b7484fbe | 3437 | expand_exit_loop_if_false (0, build (NE_EXPR, boolean_type_node, |
8d08fdba MS |
3438 | build (PREDECREMENT_EXPR, integer_type_node, iterator, integer_one_node), minus_one)); |
3439 | ||
3440 | if (obey_regdecls) | |
3441 | { | |
3442 | use_variable (DECL_RTL (base)); | |
3443 | if (base2) | |
3444 | use_variable (DECL_RTL (base2)); | |
3445 | } | |
3446 | expand_end_loop (); | |
3447 | expand_end_cond (); | |
3448 | if (obey_regdecls) | |
3449 | use_variable (DECL_RTL (iterator)); | |
3450 | } | |
3451 | done_init: | |
3452 | ||
3453 | if (obey_regdecls) | |
3454 | use_variable (DECL_RTL (rval)); | |
3455 | return rval; | |
3456 | } | |
3457 | ||
3458 | /* Free up storage of type TYPE, at address ADDR. | |
3459 | ||
3460 | TYPE is a POINTER_TYPE and can be ptr_type_node for no special type | |
3461 | of pointer. | |
3462 | ||
3463 | VIRTUAL_SIZE is the amount of storage that was allocated, and is | |
3464 | used as the second argument to operator delete. It can include | |
3465 | things like padding and magic size cookies. It has virtual in it, | |
3466 | because if you have a base pointer and you delete through a virtual | |
3467 | destructor, it should be the size of the dynamic object, not the | |
3468 | static object, see Free Store 12.5 ANSI C++ WP. | |
3469 | ||
3470 | This does not call any destructors. */ | |
3471 | tree | |
a28e3c7f | 3472 | build_x_delete (type, addr, which_delete, virtual_size) |
8d08fdba | 3473 | tree type, addr; |
a28e3c7f | 3474 | int which_delete; |
8d08fdba MS |
3475 | tree virtual_size; |
3476 | { | |
a28e3c7f MS |
3477 | int use_global_delete = which_delete & 1; |
3478 | int use_vec_delete = !!(which_delete & 2); | |
8d08fdba | 3479 | tree rval; |
a28e3c7f | 3480 | enum tree_code code = use_vec_delete ? VEC_DELETE_EXPR : DELETE_EXPR; |
8d08fdba | 3481 | |
a28e3c7f MS |
3482 | if (! use_global_delete && TYPE_LANG_SPECIFIC (TREE_TYPE (type)) |
3483 | && (TYPE_GETS_DELETE (TREE_TYPE (type)) & (1 << use_vec_delete))) | |
3484 | rval = build_opfncall (code, LOOKUP_NORMAL, addr, virtual_size, NULL_TREE); | |
8d08fdba | 3485 | else |
a28e3c7f | 3486 | rval = build_builtin_call (void_type_node, use_vec_delete ? BIVD : BID, |
8d08fdba MS |
3487 | build_tree_list (NULL_TREE, addr)); |
3488 | return rval; | |
3489 | } | |
3490 | ||
3491 | /* Generate a call to a destructor. TYPE is the type to cast ADDR to. | |
3492 | ADDR is an expression which yields the store to be destroyed. | |
3493 | AUTO_DELETE is nonzero if a call to DELETE should be made or not. | |
3494 | If in the program, (AUTO_DELETE & 2) is non-zero, we tear down the | |
3495 | virtual baseclasses. | |
3496 | If in the program, (AUTO_DELETE & 1) is non-zero, then we deallocate. | |
3497 | ||
3498 | FLAGS is the logical disjunction of zero or more LOOKUP_ | |
3499 | flags. See cp-tree.h for more info. | |
3500 | ||
3501 | This function does not delete an object's virtual base classes. */ | |
3502 | tree | |
3503 | build_delete (type, addr, auto_delete, flags, use_global_delete) | |
3504 | tree type, addr; | |
3505 | tree auto_delete; | |
3506 | int flags; | |
3507 | int use_global_delete; | |
3508 | { | |
3509 | tree function, parms; | |
3510 | tree member; | |
3511 | tree expr; | |
3512 | tree ref; | |
3513 | int ptr; | |
3514 | ||
3515 | if (addr == error_mark_node) | |
3516 | return error_mark_node; | |
3517 | ||
3518 | /* Can happen when CURRENT_EXCEPTION_OBJECT gets its type | |
3519 | set to `error_mark_node' before it gets properly cleaned up. */ | |
3520 | if (type == error_mark_node) | |
3521 | return error_mark_node; | |
3522 | ||
3523 | type = TYPE_MAIN_VARIANT (type); | |
3524 | ||
3525 | if (TREE_CODE (type) == POINTER_TYPE) | |
3526 | { | |
2986ae00 | 3527 | type = TYPE_MAIN_VARIANT (TREE_TYPE (type)); |
8d08fdba MS |
3528 | if (TYPE_SIZE (type) == 0) |
3529 | { | |
3530 | incomplete_type_error (0, type); | |
3531 | return error_mark_node; | |
3532 | } | |
3533 | if (TREE_CODE (type) == ARRAY_TYPE) | |
3534 | goto handle_array; | |
3535 | if (! IS_AGGR_TYPE (type)) | |
3536 | { | |
3537 | /* Call the builtin operator delete. */ | |
3538 | return build_builtin_call (void_type_node, BID, | |
3539 | build_tree_list (NULL_TREE, addr)); | |
3540 | } | |
3541 | if (TREE_SIDE_EFFECTS (addr)) | |
3542 | addr = save_expr (addr); | |
2986ae00 MS |
3543 | |
3544 | /* throw away const and volatile on target type of addr */ | |
6060a796 | 3545 | addr = convert_force (build_pointer_type (type), addr, 0); |
8d08fdba MS |
3546 | ref = build_indirect_ref (addr, NULL_PTR); |
3547 | ptr = 1; | |
3548 | } | |
3549 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
3550 | { | |
3551 | handle_array: | |
3552 | if (TREE_SIDE_EFFECTS (addr)) | |
3553 | addr = save_expr (addr); | |
3554 | return build_vec_delete (addr, array_type_nelts (type), | |
3555 | c_sizeof_nowarn (TREE_TYPE (type)), | |
a28e3c7f MS |
3556 | auto_delete, integer_two_node, |
3557 | use_global_delete); | |
8d08fdba MS |
3558 | } |
3559 | else | |
3560 | { | |
3561 | /* Don't check PROTECT here; leave that decision to the | |
3562 | destructor. If the destructor is accessible, call it, | |
3563 | else report error. */ | |
3564 | addr = build_unary_op (ADDR_EXPR, addr, 0); | |
3565 | if (TREE_SIDE_EFFECTS (addr)) | |
3566 | addr = save_expr (addr); | |
3567 | ||
3568 | if (TREE_CONSTANT (addr)) | |
3569 | addr = convert_pointer_to (type, addr); | |
3570 | else | |
6060a796 | 3571 | addr = convert_force (build_pointer_type (type), addr, 0); |
8d08fdba MS |
3572 | |
3573 | if (TREE_CODE (addr) == NOP_EXPR | |
3574 | && TREE_OPERAND (addr, 0) == current_class_decl) | |
3575 | ref = C_C_D; | |
3576 | else | |
3577 | ref = build_indirect_ref (addr, NULL_PTR); | |
3578 | ptr = 0; | |
3579 | } | |
3580 | ||
3581 | my_friendly_assert (IS_AGGR_TYPE (type), 220); | |
3582 | ||
3583 | if (! TYPE_NEEDS_DESTRUCTOR (type)) | |
3584 | { | |
8d08fdba MS |
3585 | if (auto_delete == integer_zero_node) |
3586 | return void_zero_node; | |
3587 | ||
3588 | /* Pass the size of the object down to the operator delete() in | |
3589 | addition to the ADDR. */ | |
a28e3c7f | 3590 | if (TYPE_GETS_REG_DELETE (type) && !use_global_delete) |
8d08fdba | 3591 | { |
8d08fdba MS |
3592 | tree virtual_size = c_sizeof_nowarn (type); |
3593 | return build_opfncall (DELETE_EXPR, LOOKUP_NORMAL, addr, | |
3594 | virtual_size, NULL_TREE); | |
3595 | } | |
3596 | ||
3597 | /* Call the builtin operator delete. */ | |
3598 | return build_builtin_call (void_type_node, BID, | |
3599 | build_tree_list (NULL_TREE, addr)); | |
3600 | } | |
3601 | parms = build_tree_list (NULL_TREE, addr); | |
3602 | ||
3603 | /* Below, we will reverse the order in which these calls are made. | |
3604 | If we have a destructor, then that destructor will take care | |
3605 | of the base classes; otherwise, we must do that here. */ | |
3606 | if (TYPE_HAS_DESTRUCTOR (type)) | |
3607 | { | |
3608 | tree dtor = DECL_MAIN_VARIANT (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), 0)); | |
3609 | tree basetypes = TYPE_BINFO (type); | |
700f8a87 MS |
3610 | tree passed_auto_delete; |
3611 | tree do_delete = NULL_TREE; | |
3612 | ||
3613 | if (use_global_delete) | |
3614 | { | |
3615 | tree cond = fold (build (BIT_AND_EXPR, integer_type_node, | |
3616 | auto_delete, integer_one_node)); | |
3617 | tree call = build_builtin_call | |
3618 | (void_type_node, BID, build_tree_list (NULL_TREE, addr)); | |
3619 | ||
3620 | cond = fold (build (COND_EXPR, void_type_node, cond, | |
3621 | call, void_zero_node)); | |
3622 | if (cond != void_zero_node) | |
3623 | do_delete = cond; | |
3624 | ||
3625 | passed_auto_delete = fold (build (BIT_AND_EXPR, integer_type_node, | |
3626 | auto_delete, integer_two_node)); | |
3627 | } | |
3628 | else | |
863adfc0 | 3629 | passed_auto_delete = auto_delete; |
8d08fdba MS |
3630 | |
3631 | if (flags & LOOKUP_PROTECT) | |
3632 | { | |
3633 | enum access_type access = compute_access (basetypes, dtor); | |
3634 | ||
3635 | if (access == access_private) | |
3636 | { | |
3637 | if (flags & LOOKUP_COMPLAIN) | |
3638 | cp_error ("destructor for type `%T' is private in this scope", type); | |
3639 | return error_mark_node; | |
3640 | } | |
3641 | else if (access == access_protected) | |
3642 | { | |
3643 | if (flags & LOOKUP_COMPLAIN) | |
3644 | cp_error ("destructor for type `%T' is protected in this scope", type); | |
3645 | return error_mark_node; | |
3646 | } | |
3647 | } | |
3648 | ||
3649 | /* Once we are in a destructor, try not going through | |
3650 | the virtual function table to find the next destructor. */ | |
3651 | if (DECL_VINDEX (dtor) | |
3652 | && ! (flags & LOOKUP_NONVIRTUAL) | |
3653 | && TREE_CODE (auto_delete) != PARM_DECL | |
3654 | && (ptr == 1 || ! resolves_to_fixed_type_p (ref, 0))) | |
3655 | { | |
3656 | tree binfo, basetype; | |
3657 | /* The code below is probably all broken. See call.c for the | |
3658 | complete right way to do this. this offsets may not be right | |
3659 | in the below. (mrs) */ | |
3660 | /* This destructor must be called via virtual function table. */ | |
3661 | dtor = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (DECL_CONTEXT (dtor)), 0); | |
3662 | basetype = DECL_CLASS_CONTEXT (dtor); | |
3663 | binfo = get_binfo (basetype, | |
3664 | TREE_TYPE (TREE_TYPE (TREE_VALUE (parms))), | |
3665 | 0); | |
3666 | expr = convert_pointer_to_real (binfo, TREE_VALUE (parms)); | |
3667 | if (expr != TREE_VALUE (parms)) | |
3668 | { | |
3669 | expr = fold (expr); | |
3670 | ref = build_indirect_ref (expr, NULL_PTR); | |
3671 | TREE_VALUE (parms) = expr; | |
3672 | } | |
3673 | function = build_vfn_ref (&TREE_VALUE (parms), ref, DECL_VINDEX (dtor)); | |
3674 | if (function == error_mark_node) | |
3675 | return error_mark_node; | |
3676 | TREE_TYPE (function) = build_pointer_type (TREE_TYPE (dtor)); | |
700f8a87 | 3677 | TREE_CHAIN (parms) = build_tree_list (NULL_TREE, passed_auto_delete); |
8d08fdba | 3678 | expr = build_function_call (function, parms); |
700f8a87 MS |
3679 | if (do_delete) |
3680 | expr = build (COMPOUND_EXPR, void_type_node, expr, do_delete); | |
8d08fdba MS |
3681 | if (ptr && (flags & LOOKUP_DESTRUCTOR) == 0) |
3682 | { | |
3683 | /* Handle the case where a virtual destructor is | |
3684 | being called on an item that is 0. | |
3685 | ||
3686 | @@ Does this really need to be done? */ | |
3687 | tree ifexp = build_binary_op(NE_EXPR, addr, integer_zero_node,1); | |
3688 | #if 0 | |
3689 | if (TREE_CODE (ref) == VAR_DECL | |
3690 | || TREE_CODE (ref) == COMPONENT_REF) | |
3691 | warning ("losing in build_delete"); | |
3692 | #endif | |
3693 | expr = build (COND_EXPR, void_type_node, | |
3694 | ifexp, expr, void_zero_node); | |
3695 | } | |
3696 | } | |
3697 | else | |
3698 | { | |
3699 | tree ifexp; | |
3700 | ||
3701 | if ((flags & LOOKUP_DESTRUCTOR) | |
3702 | || TREE_CODE (ref) == VAR_DECL | |
3703 | || TREE_CODE (ref) == PARM_DECL | |
3704 | || TREE_CODE (ref) == COMPONENT_REF | |
3705 | || TREE_CODE (ref) == ARRAY_REF) | |
3706 | /* These can't be 0. */ | |
3707 | ifexp = integer_one_node; | |
3708 | else | |
3709 | /* Handle the case where a non-virtual destructor is | |
3710 | being called on an item that is 0. */ | |
3711 | ifexp = build_binary_op (NE_EXPR, addr, integer_zero_node, 1); | |
3712 | ||
3713 | /* Used to mean that this destructor was known to be empty, | |
3714 | but that's now obsolete. */ | |
3715 | my_friendly_assert (DECL_INITIAL (dtor) != void_type_node, 221); | |
3716 | ||
700f8a87 | 3717 | TREE_CHAIN (parms) = build_tree_list (NULL_TREE, passed_auto_delete); |
8d08fdba | 3718 | expr = build_function_call (dtor, parms); |
700f8a87 MS |
3719 | if (do_delete) |
3720 | expr = build (COMPOUND_EXPR, void_type_node, expr, do_delete); | |
8d08fdba MS |
3721 | |
3722 | if (ifexp != integer_one_node) | |
3723 | expr = build (COND_EXPR, void_type_node, | |
3724 | ifexp, expr, void_zero_node); | |
3725 | } | |
3726 | return expr; | |
3727 | } | |
3728 | else | |
3729 | { | |
3730 | /* This can get visibilities wrong. */ | |
3731 | tree binfos = BINFO_BASETYPES (TYPE_BINFO (type)); | |
3732 | int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
3733 | tree base_binfo = n_baseclasses > 0 ? TREE_VEC_ELT (binfos, 0) : NULL_TREE; | |
3734 | tree exprstmt = NULL_TREE; | |
3735 | tree parent_auto_delete = auto_delete; | |
3736 | tree cond; | |
3737 | ||
3738 | /* If this type does not have a destructor, but does have | |
3739 | operator delete, call the parent parent destructor (if any), | |
3740 | but let this node do the deleting. Otherwise, it is ok | |
3741 | to let the parent destructor do the deleting. */ | |
a28e3c7f | 3742 | if (TYPE_GETS_REG_DELETE (type) && !use_global_delete) |
8d08fdba MS |
3743 | { |
3744 | parent_auto_delete = integer_zero_node; | |
3745 | if (auto_delete == integer_zero_node) | |
3746 | cond = NULL_TREE; | |
3747 | else | |
3748 | { | |
3749 | tree virtual_size; | |
3750 | ||
3751 | /* This is probably wrong. It should be the size of the | |
3752 | virtual object being deleted. */ | |
3753 | virtual_size = c_sizeof_nowarn (type); | |
3754 | ||
3755 | expr = build_opfncall (DELETE_EXPR, LOOKUP_NORMAL, addr, | |
3756 | virtual_size, NULL_TREE); | |
3757 | if (expr == error_mark_node) | |
3758 | return error_mark_node; | |
3759 | if (auto_delete != integer_one_node) | |
3760 | cond = build (COND_EXPR, void_type_node, | |
3761 | build (BIT_AND_EXPR, integer_type_node, | |
3762 | auto_delete, integer_one_node), | |
3763 | expr, void_zero_node); | |
3764 | else | |
3765 | cond = expr; | |
3766 | } | |
3767 | } | |
3768 | else if (base_binfo == NULL_TREE | |
3769 | || (TREE_VIA_VIRTUAL (base_binfo) == 0 | |
3770 | && ! TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo)))) | |
3771 | { | |
3772 | tree virtual_size; | |
3773 | ||
3774 | /* This is probably wrong. It should be the size of the virtual | |
3775 | object being deleted. */ | |
3776 | virtual_size = c_sizeof_nowarn (type); | |
3777 | ||
3778 | cond = build (COND_EXPR, void_type_node, | |
3779 | build (BIT_AND_EXPR, integer_type_node, auto_delete, integer_one_node), | |
3780 | build_builtin_call (void_type_node, BID, | |
3781 | build_tree_list (NULL_TREE, addr)), | |
3782 | void_zero_node); | |
3783 | } | |
3784 | else | |
3785 | cond = NULL_TREE; | |
3786 | ||
3787 | if (cond) | |
3788 | exprstmt = build_tree_list (NULL_TREE, cond); | |
3789 | ||
3790 | if (base_binfo | |
3791 | && ! TREE_VIA_VIRTUAL (base_binfo) | |
3792 | && TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo))) | |
3793 | { | |
3794 | tree this_auto_delete; | |
3795 | ||
3796 | if (BINFO_OFFSET_ZEROP (base_binfo)) | |
3797 | this_auto_delete = parent_auto_delete; | |
3798 | else | |
3799 | this_auto_delete = integer_zero_node; | |
3800 | ||
3801 | expr = build_delete (TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), addr, | |
3802 | this_auto_delete, flags, 0); | |
3803 | exprstmt = tree_cons (NULL_TREE, expr, exprstmt); | |
3804 | } | |
3805 | ||
3806 | /* Take care of the remaining baseclasses. */ | |
3807 | for (i = 1; i < n_baseclasses; i++) | |
3808 | { | |
3809 | base_binfo = TREE_VEC_ELT (binfos, i); | |
3810 | if (! TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo)) | |
3811 | || TREE_VIA_VIRTUAL (base_binfo)) | |
3812 | continue; | |
3813 | ||
3814 | /* May be zero offset if other baseclasses are virtual. */ | |
3815 | expr = fold (build (PLUS_EXPR, TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), | |
3816 | addr, BINFO_OFFSET (base_binfo))); | |
3817 | ||
3818 | expr = build_delete (TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), expr, | |
3819 | integer_zero_node, | |
3820 | flags, 0); | |
3821 | ||
3822 | exprstmt = tree_cons (NULL_TREE, expr, exprstmt); | |
3823 | } | |
3824 | ||
3825 | for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member)) | |
3826 | { | |
3827 | if (TREE_CODE (member) != FIELD_DECL) | |
3828 | continue; | |
3829 | if (TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (member))) | |
3830 | { | |
3831 | tree this_member = build_component_ref (ref, DECL_NAME (member), 0, 0); | |
3832 | tree this_type = TREE_TYPE (member); | |
3833 | expr = build_delete (this_type, this_member, integer_two_node, flags, 0); | |
3834 | exprstmt = tree_cons (NULL_TREE, expr, exprstmt); | |
3835 | } | |
3836 | } | |
3837 | ||
3838 | if (exprstmt) | |
3839 | return build_compound_expr (exprstmt); | |
3840 | /* Virtual base classes make this function do nothing. */ | |
3841 | return void_zero_node; | |
3842 | } | |
3843 | } | |
3844 | ||
3845 | /* For type TYPE, delete the virtual baseclass objects of DECL. */ | |
3846 | ||
3847 | tree | |
3848 | build_vbase_delete (type, decl) | |
3849 | tree type, decl; | |
3850 | { | |
3851 | tree vbases = CLASSTYPE_VBASECLASSES (type); | |
3852 | tree result = NULL_TREE; | |
3853 | tree addr = build_unary_op (ADDR_EXPR, decl, 0); | |
3854 | ||
3855 | my_friendly_assert (addr != error_mark_node, 222); | |
3856 | ||
3857 | while (vbases) | |
3858 | { | |
3859 | tree this_addr = convert_force (TYPE_POINTER_TO (BINFO_TYPE (vbases)), | |
6060a796 | 3860 | addr, 0); |
8d08fdba MS |
3861 | result = tree_cons (NULL_TREE, |
3862 | build_delete (TREE_TYPE (this_addr), this_addr, | |
3863 | integer_zero_node, | |
3864 | LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 0), | |
3865 | result); | |
3866 | vbases = TREE_CHAIN (vbases); | |
3867 | } | |
3868 | return build_compound_expr (nreverse (result)); | |
3869 | } | |
3870 | ||
3871 | /* Build a C++ vector delete expression. | |
3872 | MAXINDEX is the number of elements to be deleted. | |
3873 | ELT_SIZE is the nominal size of each element in the vector. | |
3874 | BASE is the expression that should yield the store to be deleted. | |
8d08fdba MS |
3875 | This function expands (or synthesizes) these calls itself. |
3876 | AUTO_DELETE_VEC says whether the container (vector) should be deallocated. | |
3877 | AUTO_DELETE say whether each item in the container should be deallocated. | |
3878 | ||
3879 | This also calls delete for virtual baseclasses of elements of the vector. | |
3880 | ||
3881 | Update: MAXINDEX is no longer needed. The size can be extracted from the | |
3882 | start of the vector for pointers, and from the type for arrays. We still | |
3883 | use MAXINDEX for arrays because it happens to already have one of the | |
3884 | values we'd have to extract. (We could use MAXINDEX with pointers to | |
3885 | confirm the size, and trap if the numbers differ; not clear that it'd | |
3886 | be worth bothering.) */ | |
3887 | tree | |
a28e3c7f MS |
3888 | build_vec_delete (base, maxindex, elt_size, auto_delete_vec, auto_delete, |
3889 | use_global_delete) | |
8d08fdba | 3890 | tree base, maxindex, elt_size; |
8d08fdba | 3891 | tree auto_delete_vec, auto_delete; |
a28e3c7f | 3892 | int use_global_delete; |
8d08fdba MS |
3893 | { |
3894 | tree ptype = TREE_TYPE (base); | |
3895 | tree type; | |
3896 | tree virtual_size; | |
3897 | /* Temporary variables used by the loop. */ | |
3898 | tree tbase, size_exp, tbase_init; | |
3899 | ||
3900 | /* This is the body of the loop that implements the deletion of a | |
3901 | single element, and moves temp variables to next elements. */ | |
3902 | tree body; | |
3903 | ||
3904 | /* This is the LOOP_EXPR that governs the deletion of the elements. */ | |
3905 | tree loop; | |
3906 | ||
3907 | /* This is the thing that governs what to do after the loop has run. */ | |
3908 | tree deallocate_expr = 0; | |
3909 | ||
3910 | /* This is the BIND_EXPR which holds the outermost iterator of the | |
3911 | loop. It is convenient to set this variable up and test it before | |
3912 | executing any other code in the loop. | |
3913 | This is also the containing expression returned by this function. */ | |
3914 | tree controller = NULL_TREE; | |
3915 | ||
3916 | /* This is the BLOCK to record the symbol binding for debugging. */ | |
3917 | tree block; | |
3918 | ||
3919 | base = stabilize_reference (base); | |
3920 | ||
3921 | /* Since we can use base many times, save_expr it. */ | |
3922 | if (TREE_SIDE_EFFECTS (base)) | |
3923 | base = save_expr (base); | |
3924 | ||
3925 | if (TREE_CODE (ptype) == POINTER_TYPE) | |
3926 | { | |
3927 | /* Step back one from start of vector, and read dimension. */ | |
3928 | tree cookie_addr = build (MINUS_EXPR, TYPE_POINTER_TO (BI_header_type), | |
3929 | base, BI_header_size); | |
3930 | tree cookie = build_indirect_ref (cookie_addr, NULL_PTR); | |
3931 | maxindex = build_component_ref (cookie, nc_nelts_field_id, 0, 0); | |
3932 | do | |
3933 | ptype = TREE_TYPE (ptype); | |
3934 | while (TREE_CODE (ptype) == ARRAY_TYPE); | |
3935 | } | |
3936 | else if (TREE_CODE (ptype) == ARRAY_TYPE) | |
3937 | { | |
3938 | /* get the total number of things in the array, maxindex is a bad name */ | |
3939 | maxindex = array_type_nelts_total (ptype); | |
3940 | while (TREE_CODE (ptype) == ARRAY_TYPE) | |
3941 | ptype = TREE_TYPE (ptype); | |
3942 | base = build_unary_op (ADDR_EXPR, base, 1); | |
3943 | } | |
3944 | else | |
3945 | { | |
3946 | error ("type to vector delete is neither pointer or array type"); | |
3947 | return error_mark_node; | |
3948 | } | |
3949 | type = ptype; | |
3950 | ptype = TYPE_POINTER_TO (type); | |
3951 | ||
3952 | size_exp = size_in_bytes (type); | |
3953 | ||
3954 | if (! IS_AGGR_TYPE (type) || ! TYPE_NEEDS_DESTRUCTOR (type)) | |
3955 | { | |
3956 | loop = integer_zero_node; | |
3957 | goto no_destructor; | |
3958 | } | |
3959 | ||
3960 | /* The below is short by BI_header_size */ | |
3961 | virtual_size = fold (size_binop (MULT_EXPR, size_exp, maxindex)); | |
3962 | ||
3963 | tbase = build_decl (VAR_DECL, NULL_TREE, ptype); | |
3964 | tbase_init = build_modify_expr (tbase, NOP_EXPR, | |
3965 | fold (build (PLUS_EXPR, ptype, | |
3966 | base, | |
3967 | virtual_size))); | |
3968 | DECL_REGISTER (tbase) = 1; | |
3969 | controller = build (BIND_EXPR, void_type_node, tbase, 0, 0); | |
3970 | TREE_SIDE_EFFECTS (controller) = 1; | |
3971 | block = build_block (tbase, 0, 0, 0, 0); | |
3972 | add_block_current_level (block); | |
3973 | ||
3974 | if (auto_delete != integer_zero_node | |
3975 | && auto_delete != integer_two_node) | |
3976 | { | |
3977 | tree base_tbd = convert (ptype, | |
3978 | build_binary_op (MINUS_EXPR, | |
3979 | convert (ptr_type_node, base), | |
3980 | BI_header_size, | |
3981 | 1)); | |
3982 | /* This is the real size */ | |
3983 | virtual_size = size_binop (PLUS_EXPR, virtual_size, BI_header_size); | |
3984 | body = build_tree_list (NULL_TREE, | |
a28e3c7f MS |
3985 | build_x_delete (ptype, base_tbd, |
3986 | 2 | use_global_delete, | |
8d08fdba MS |
3987 | virtual_size)); |
3988 | body = build (COND_EXPR, void_type_node, | |
3989 | build (BIT_AND_EXPR, integer_type_node, | |
3990 | auto_delete, integer_one_node), | |
3991 | body, integer_zero_node); | |
3992 | } | |
3993 | else | |
3994 | body = NULL_TREE; | |
3995 | ||
3996 | body = tree_cons (NULL_TREE, | |
3997 | build_delete (ptype, tbase, auto_delete, | |
8926095f | 3998 | LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 1), |
8d08fdba MS |
3999 | body); |
4000 | ||
4001 | body = tree_cons (NULL_TREE, | |
4002 | build_modify_expr (tbase, NOP_EXPR, build (MINUS_EXPR, ptype, tbase, size_exp)), | |
4003 | body); | |
4004 | ||
4005 | body = tree_cons (NULL_TREE, | |
4006 | build (EXIT_EXPR, void_type_node, | |
b7484fbe | 4007 | build (EQ_EXPR, boolean_type_node, base, tbase)), |
8d08fdba MS |
4008 | body); |
4009 | ||
4010 | loop = build (LOOP_EXPR, void_type_node, build_compound_expr (body)); | |
4011 | ||
4012 | loop = tree_cons (NULL_TREE, tbase_init, | |
4013 | tree_cons (NULL_TREE, loop, NULL_TREE)); | |
4014 | loop = build_compound_expr (loop); | |
4015 | ||
4016 | no_destructor: | |
4017 | /* If the delete flag is one, or anything else with the low bit set, | |
4018 | delete the storage. */ | |
4019 | if (auto_delete_vec == integer_zero_node | |
4020 | || auto_delete_vec == integer_two_node) | |
4021 | deallocate_expr = integer_zero_node; | |
4022 | else | |
4023 | { | |
4024 | tree base_tbd; | |
4025 | ||
4026 | /* The below is short by BI_header_size */ | |
4027 | virtual_size = fold (size_binop (MULT_EXPR, size_exp, maxindex)); | |
4028 | ||
a28e3c7f | 4029 | if (! TYPE_VEC_NEW_USES_COOKIE (type)) |
8d08fdba MS |
4030 | /* no header */ |
4031 | base_tbd = base; | |
4032 | else | |
4033 | { | |
4034 | base_tbd = convert (ptype, | |
4035 | build_binary_op (MINUS_EXPR, | |
4036 | convert (string_type_node, base), | |
4037 | BI_header_size, | |
4038 | 1)); | |
4039 | /* True size with header. */ | |
4040 | virtual_size = size_binop (PLUS_EXPR, virtual_size, BI_header_size); | |
4041 | } | |
a28e3c7f MS |
4042 | deallocate_expr = build_x_delete (ptype, base_tbd, |
4043 | 2 | use_global_delete, | |
8d08fdba MS |
4044 | virtual_size); |
4045 | if (auto_delete_vec != integer_one_node) | |
4046 | deallocate_expr = build (COND_EXPR, void_type_node, | |
4047 | build (BIT_AND_EXPR, integer_type_node, | |
4048 | auto_delete_vec, integer_one_node), | |
4049 | deallocate_expr, integer_zero_node); | |
4050 | } | |
4051 | ||
4052 | if (loop && deallocate_expr != integer_zero_node) | |
4053 | { | |
4054 | body = tree_cons (NULL_TREE, loop, | |
4055 | tree_cons (NULL_TREE, deallocate_expr, NULL_TREE)); | |
4056 | body = build_compound_expr (body); | |
4057 | } | |
4058 | else | |
4059 | body = loop; | |
4060 | ||
4061 | /* Outermost wrapper: If pointer is null, punt. */ | |
4062 | body = build (COND_EXPR, void_type_node, | |
b7484fbe | 4063 | build (NE_EXPR, boolean_type_node, base, integer_zero_node), |
8d08fdba MS |
4064 | body, integer_zero_node); |
4065 | body = build1 (NOP_EXPR, void_type_node, body); | |
4066 | ||
4067 | if (controller) | |
4068 | { | |
4069 | TREE_OPERAND (controller, 1) = body; | |
4070 | return controller; | |
4071 | } | |
4072 | else | |
4073 | return convert (void_type_node, body); | |
4074 | } |