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8d08fdba | 1 | /* Handle initialization things in C++. |
d6a8bdff | 2 | Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
66647d44 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
058dcc25 | 4 | Free Software Foundation, Inc. |
8d08fdba MS |
5 | Contributed by Michael Tiemann (tiemann@cygnus.com) |
6 | ||
f5adbb8d | 7 | This file is part of GCC. |
8d08fdba | 8 | |
f5adbb8d | 9 | GCC is free software; you can redistribute it and/or modify |
8d08fdba | 10 | it under the terms of the GNU General Public License as published by |
e77f031d | 11 | the Free Software Foundation; either version 3, or (at your option) |
8d08fdba MS |
12 | any later version. |
13 | ||
f5adbb8d | 14 | GCC is distributed in the hope that it will be useful, |
8d08fdba MS |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
e77f031d NC |
20 | along with GCC; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. */ | |
8d08fdba | 22 | |
e92cc029 | 23 | /* High-level class interface. */ |
8d08fdba MS |
24 | |
25 | #include "config.h" | |
8d052bc7 | 26 | #include "system.h" |
4977bab6 ZW |
27 | #include "coretypes.h" |
28 | #include "tm.h" | |
8d08fdba MS |
29 | #include "tree.h" |
30 | #include "rtl.h" | |
8f17b5c5 | 31 | #include "expr.h" |
8d08fdba MS |
32 | #include "cp-tree.h" |
33 | #include "flags.h" | |
e8abc66f | 34 | #include "output.h" |
eb66be0e | 35 | #include "except.h" |
54f92bfb | 36 | #include "toplev.h" |
46e995e0 | 37 | #include "target.h" |
8d08fdba | 38 | |
2a3398e1 NS |
39 | static bool begin_init_stmts (tree *, tree *); |
40 | static tree finish_init_stmts (bool, tree, tree); | |
2282d28d | 41 | static void construct_virtual_base (tree, tree); |
5ade1ed2 DG |
42 | static void expand_aggr_init_1 (tree, tree, tree, tree, int, tsubst_flags_t); |
43 | static void expand_default_init (tree, tree, tree, tree, int, tsubst_flags_t); | |
362efdc1 | 44 | static tree build_vec_delete_1 (tree, tree, tree, special_function_kind, int); |
2282d28d | 45 | static void perform_member_init (tree, tree); |
362efdc1 NN |
46 | static tree build_builtin_delete_call (tree); |
47 | static int member_init_ok_or_else (tree, tree, tree); | |
48 | static void expand_virtual_init (tree, tree); | |
2282d28d | 49 | static tree sort_mem_initializers (tree, tree); |
362efdc1 NN |
50 | static tree initializing_context (tree); |
51 | static void expand_cleanup_for_base (tree, tree); | |
52 | static tree get_temp_regvar (tree, tree); | |
53 | static tree dfs_initialize_vtbl_ptrs (tree, void *); | |
362efdc1 NN |
54 | static tree build_dtor_call (tree, special_function_kind, int); |
55 | static tree build_field_list (tree, tree, int *); | |
56 | static tree build_vtbl_address (tree); | |
8d08fdba | 57 | |
3dbc07b6 MM |
58 | /* We are about to generate some complex initialization code. |
59 | Conceptually, it is all a single expression. However, we may want | |
60 | to include conditionals, loops, and other such statement-level | |
61 | constructs. Therefore, we build the initialization code inside a | |
62 | statement-expression. This function starts such an expression. | |
63 | STMT_EXPR_P and COMPOUND_STMT_P are filled in by this function; | |
64 | pass them back to finish_init_stmts when the expression is | |
65 | complete. */ | |
66 | ||
2a3398e1 | 67 | static bool |
362efdc1 | 68 | begin_init_stmts (tree *stmt_expr_p, tree *compound_stmt_p) |
3dbc07b6 | 69 | { |
2a3398e1 | 70 | bool is_global = !building_stmt_tree (); |
c8094d83 | 71 | |
2a3398e1 | 72 | *stmt_expr_p = begin_stmt_expr (); |
325c3691 | 73 | *compound_stmt_p = begin_compound_stmt (BCS_NO_SCOPE); |
2a3398e1 NS |
74 | |
75 | return is_global; | |
3dbc07b6 MM |
76 | } |
77 | ||
78 | /* Finish out the statement-expression begun by the previous call to | |
79 | begin_init_stmts. Returns the statement-expression itself. */ | |
80 | ||
2a3398e1 NS |
81 | static tree |
82 | finish_init_stmts (bool is_global, tree stmt_expr, tree compound_stmt) | |
c8094d83 | 83 | { |
7a3397c7 | 84 | finish_compound_stmt (compound_stmt); |
c8094d83 | 85 | |
303b7406 | 86 | stmt_expr = finish_stmt_expr (stmt_expr, true); |
3dbc07b6 | 87 | |
50bc768d | 88 | gcc_assert (!building_stmt_tree () == is_global); |
c8094d83 | 89 | |
3dbc07b6 MM |
90 | return stmt_expr; |
91 | } | |
92 | ||
93 | /* Constructors */ | |
94 | ||
338d90b8 NS |
95 | /* Called from initialize_vtbl_ptrs via dfs_walk. BINFO is the base |
96 | which we want to initialize the vtable pointer for, DATA is | |
97 | TREE_LIST whose TREE_VALUE is the this ptr expression. */ | |
7177d104 | 98 | |
d569399b | 99 | static tree |
362efdc1 | 100 | dfs_initialize_vtbl_ptrs (tree binfo, void *data) |
d569399b | 101 | { |
5d5a519f NS |
102 | if (!TYPE_CONTAINS_VPTR_P (BINFO_TYPE (binfo))) |
103 | return dfs_skip_bases; | |
c8094d83 | 104 | |
5d5a519f | 105 | if (!BINFO_PRIMARY_P (binfo) || BINFO_VIRTUAL_P (binfo)) |
d569399b MM |
106 | { |
107 | tree base_ptr = TREE_VALUE ((tree) data); | |
7177d104 | 108 | |
338d90b8 | 109 | base_ptr = build_base_path (PLUS_EXPR, base_ptr, binfo, /*nonnull=*/1); |
d569399b MM |
110 | |
111 | expand_virtual_init (binfo, base_ptr); | |
112 | } | |
7177d104 | 113 | |
d569399b MM |
114 | return NULL_TREE; |
115 | } | |
116 | ||
cf2e003b MM |
117 | /* Initialize all the vtable pointers in the object pointed to by |
118 | ADDR. */ | |
e92cc029 | 119 | |
8d08fdba | 120 | void |
362efdc1 | 121 | initialize_vtbl_ptrs (tree addr) |
8d08fdba | 122 | { |
cf2e003b MM |
123 | tree list; |
124 | tree type; | |
125 | ||
126 | type = TREE_TYPE (TREE_TYPE (addr)); | |
127 | list = build_tree_list (type, addr); | |
d569399b | 128 | |
bbd15aac | 129 | /* Walk through the hierarchy, initializing the vptr in each base |
1f5a253a | 130 | class. We do these in pre-order because we can't find the virtual |
3461fba7 NS |
131 | bases for a class until we've initialized the vtbl for that |
132 | class. */ | |
5d5a519f | 133 | dfs_walk_once (TYPE_BINFO (type), dfs_initialize_vtbl_ptrs, NULL, list); |
8d08fdba | 134 | } |
d569399b | 135 | |
17bbb839 MM |
136 | /* Return an expression for the zero-initialization of an object with |
137 | type T. This expression will either be a constant (in the case | |
138 | that T is a scalar), or a CONSTRUCTOR (in the case that T is an | |
b43d1bde PC |
139 | aggregate), or NULL (in the case that T does not require |
140 | initialization). In either case, the value can be used as | |
141 | DECL_INITIAL for a decl of the indicated TYPE; it is a valid static | |
142 | initializer. If NELTS is non-NULL, and TYPE is an ARRAY_TYPE, NELTS | |
143 | is the number of elements in the array. If STATIC_STORAGE_P is | |
144 | TRUE, initializers are only generated for entities for which | |
1cb8292f MM |
145 | zero-initialization does not simply mean filling the storage with |
146 | zero bytes. */ | |
94e6e4c4 AO |
147 | |
148 | tree | |
1cb8292f | 149 | build_zero_init (tree type, tree nelts, bool static_storage_p) |
94e6e4c4 | 150 | { |
17bbb839 MM |
151 | tree init = NULL_TREE; |
152 | ||
153 | /* [dcl.init] | |
154 | ||
0fcedd9c | 155 | To zero-initialize an object of type T means: |
17bbb839 MM |
156 | |
157 | -- if T is a scalar type, the storage is set to the value of zero | |
0cbd7506 | 158 | converted to T. |
17bbb839 MM |
159 | |
160 | -- if T is a non-union class type, the storage for each nonstatic | |
0cbd7506 | 161 | data member and each base-class subobject is zero-initialized. |
17bbb839 MM |
162 | |
163 | -- if T is a union type, the storage for its first data member is | |
0cbd7506 | 164 | zero-initialized. |
17bbb839 MM |
165 | |
166 | -- if T is an array type, the storage for each element is | |
0cbd7506 | 167 | zero-initialized. |
17bbb839 MM |
168 | |
169 | -- if T is a reference type, no initialization is performed. */ | |
94e6e4c4 | 170 | |
50bc768d | 171 | gcc_assert (nelts == NULL_TREE || TREE_CODE (nelts) == INTEGER_CST); |
7a1d37e9 | 172 | |
17bbb839 MM |
173 | if (type == error_mark_node) |
174 | ; | |
175 | else if (static_storage_p && zero_init_p (type)) | |
176 | /* In order to save space, we do not explicitly build initializers | |
177 | for items that do not need them. GCC's semantics are that | |
178 | items with static storage duration that are not otherwise | |
179 | initialized are initialized to zero. */ | |
180 | ; | |
b8063b29 | 181 | else if (SCALAR_TYPE_P (type)) |
17bbb839 MM |
182 | init = convert (type, integer_zero_node); |
183 | else if (CLASS_TYPE_P (type)) | |
184 | { | |
185 | tree field; | |
4038c495 | 186 | VEC(constructor_elt,gc) *v = NULL; |
17bbb839 | 187 | |
17bbb839 | 188 | /* Iterate over the fields, building initializations. */ |
17bbb839 MM |
189 | for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) |
190 | { | |
191 | if (TREE_CODE (field) != FIELD_DECL) | |
192 | continue; | |
193 | ||
194 | /* Note that for class types there will be FIELD_DECLs | |
195 | corresponding to base classes as well. Thus, iterating | |
196 | over TYPE_FIELDs will result in correct initialization of | |
197 | all of the subobjects. */ | |
32a11c08 | 198 | if (!static_storage_p || !zero_init_p (TREE_TYPE (field))) |
4038c495 GB |
199 | { |
200 | tree value = build_zero_init (TREE_TYPE (field), | |
201 | /*nelts=*/NULL_TREE, | |
202 | static_storage_p); | |
b43d1bde PC |
203 | if (value) |
204 | CONSTRUCTOR_APPEND_ELT(v, field, value); | |
4038c495 | 205 | } |
17bbb839 MM |
206 | |
207 | /* For unions, only the first field is initialized. */ | |
208 | if (TREE_CODE (type) == UNION_TYPE) | |
209 | break; | |
210 | } | |
4038c495 | 211 | |
0fcedd9c JM |
212 | /* Build a constructor to contain the initializations. */ |
213 | init = build_constructor (type, v); | |
17bbb839 MM |
214 | } |
215 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
94e6e4c4 | 216 | { |
17bbb839 | 217 | tree max_index; |
4038c495 | 218 | VEC(constructor_elt,gc) *v = NULL; |
17bbb839 | 219 | |
17bbb839 | 220 | /* Iterate over the array elements, building initializations. */ |
6b6c8106 | 221 | if (nelts) |
7866705a SB |
222 | max_index = fold_build2 (MINUS_EXPR, TREE_TYPE (nelts), |
223 | nelts, integer_one_node); | |
6b6c8106 SB |
224 | else |
225 | max_index = array_type_nelts (type); | |
9bdb04a2 AP |
226 | |
227 | /* If we have an error_mark here, we should just return error mark | |
228 | as we don't know the size of the array yet. */ | |
229 | if (max_index == error_mark_node) | |
230 | return error_mark_node; | |
50bc768d | 231 | gcc_assert (TREE_CODE (max_index) == INTEGER_CST); |
7a1d37e9 | 232 | |
a8e6c82a MM |
233 | /* A zero-sized array, which is accepted as an extension, will |
234 | have an upper bound of -1. */ | |
235 | if (!tree_int_cst_equal (max_index, integer_minus_one_node)) | |
94763647 | 236 | { |
4038c495 GB |
237 | constructor_elt *ce; |
238 | ||
239 | v = VEC_alloc (constructor_elt, gc, 1); | |
240 | ce = VEC_quick_push (constructor_elt, v, NULL); | |
c8094d83 | 241 | |
b01f0d13 AP |
242 | /* If this is a one element array, we just use a regular init. */ |
243 | if (tree_int_cst_equal (size_zero_node, max_index)) | |
4038c495 | 244 | ce->index = size_zero_node; |
b01f0d13 | 245 | else |
4038c495 GB |
246 | ce->index = build2 (RANGE_EXPR, sizetype, size_zero_node, |
247 | max_index); | |
c8094d83 | 248 | |
4038c495 GB |
249 | ce->value = build_zero_init (TREE_TYPE (type), |
250 | /*nelts=*/NULL_TREE, | |
251 | static_storage_p); | |
94763647 | 252 | } |
c8094d83 | 253 | |
4038c495 GB |
254 | /* Build a constructor to contain the initializations. */ |
255 | init = build_constructor (type, v); | |
94e6e4c4 | 256 | } |
c846e8cd AP |
257 | else if (TREE_CODE (type) == VECTOR_TYPE) |
258 | init = fold_convert (type, integer_zero_node); | |
94e6e4c4 | 259 | else |
8dc2b103 | 260 | gcc_assert (TREE_CODE (type) == REFERENCE_TYPE); |
94e6e4c4 | 261 | |
17bbb839 MM |
262 | /* In all cases, the initializer is a constant. */ |
263 | if (init) | |
51eed280 | 264 | TREE_CONSTANT (init) = 1; |
94e6e4c4 AO |
265 | |
266 | return init; | |
267 | } | |
268 | ||
0fcedd9c | 269 | /* Return a suitable initializer for value-initializing an object of type |
8f540f06 | 270 | TYPE, as described in [dcl.init]. */ |
0fcedd9c | 271 | |
8f540f06 JM |
272 | tree |
273 | build_value_init (tree type) | |
0fcedd9c JM |
274 | { |
275 | /* [dcl.init] | |
276 | ||
277 | To value-initialize an object of type T means: | |
278 | ||
279 | - if T is a class type (clause 9) with a user-provided constructor | |
280 | (12.1), then the default constructor for T is called (and the | |
281 | initialization is ill-formed if T has no accessible default | |
282 | constructor); | |
283 | ||
284 | - if T is a non-union class type without a user-provided constructor, | |
285 | then every non-static data member and base-class component of T is | |
286 | value-initialized;92) | |
287 | ||
288 | - if T is an array type, then each element is value-initialized; | |
289 | ||
290 | - otherwise, the object is zero-initialized. | |
291 | ||
292 | A program that calls for default-initialization or | |
293 | value-initialization of an entity of reference type is ill-formed. | |
294 | ||
295 | 92) Value-initialization for such a class object may be implemented by | |
296 | zero-initializing the object and then calling the default | |
297 | constructor. */ | |
298 | ||
299 | if (CLASS_TYPE_P (type)) | |
300 | { | |
8f540f06 | 301 | if (type_has_user_provided_constructor (type)) |
844ae01d | 302 | return build_aggr_init_expr |
0fcedd9c JM |
303 | (type, |
304 | build_special_member_call (NULL_TREE, complete_ctor_identifier, | |
5ade1ed2 DG |
305 | NULL_TREE, type, LOOKUP_NORMAL, |
306 | tf_warning_or_error)); | |
8f540f06 JM |
307 | else if (TREE_CODE (type) != UNION_TYPE && TYPE_NEEDS_CONSTRUCTING (type)) |
308 | { | |
309 | /* This is a class that needs constructing, but doesn't have | |
310 | a user-provided constructor. So we need to zero-initialize | |
311 | the object and then call the implicitly defined ctor. | |
450a927a | 312 | This will be handled in simplify_aggr_init_expr. */ |
8f540f06 JM |
313 | tree ctor = build_special_member_call |
314 | (NULL_TREE, complete_ctor_identifier, | |
315 | NULL_TREE, type, LOOKUP_NORMAL, tf_warning_or_error); | |
316 | ||
450a927a JM |
317 | ctor = build_aggr_init_expr (type, ctor); |
318 | AGGR_INIT_ZERO_FIRST (ctor) = 1; | |
8f540f06 JM |
319 | return ctor; |
320 | } | |
fd97a96a JM |
321 | } |
322 | return build_value_init_noctor (type); | |
323 | } | |
324 | ||
325 | /* Like build_value_init, but don't call the constructor for TYPE. Used | |
326 | for base initializers. */ | |
327 | ||
328 | tree | |
329 | build_value_init_noctor (tree type) | |
330 | { | |
331 | if (CLASS_TYPE_P (type)) | |
332 | { | |
333 | gcc_assert (!TYPE_NEEDS_CONSTRUCTING (type)); | |
334 | ||
335 | if (TREE_CODE (type) != UNION_TYPE) | |
0fcedd9c | 336 | { |
8f540f06 | 337 | tree field; |
0fcedd9c | 338 | VEC(constructor_elt,gc) *v = NULL; |
0fcedd9c JM |
339 | |
340 | /* Iterate over the fields, building initializations. */ | |
341 | for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) | |
342 | { | |
343 | tree ftype, value; | |
344 | ||
345 | if (TREE_CODE (field) != FIELD_DECL) | |
346 | continue; | |
347 | ||
348 | ftype = TREE_TYPE (field); | |
349 | ||
350 | if (TREE_CODE (ftype) == REFERENCE_TYPE) | |
351 | error ("value-initialization of reference"); | |
352 | ||
353 | /* We could skip vfields and fields of types with | |
354 | user-defined constructors, but I think that won't improve | |
355 | performance at all; it should be simpler in general just | |
356 | to zero out the entire object than try to only zero the | |
357 | bits that actually need it. */ | |
358 | ||
359 | /* Note that for class types there will be FIELD_DECLs | |
360 | corresponding to base classes as well. Thus, iterating | |
361 | over TYPE_FIELDs will result in correct initialization of | |
362 | all of the subobjects. */ | |
8f540f06 | 363 | value = build_value_init (ftype); |
0fcedd9c JM |
364 | |
365 | if (value) | |
366 | CONSTRUCTOR_APPEND_ELT(v, field, value); | |
367 | } | |
368 | ||
369 | /* Build a constructor to contain the zero- initializations. */ | |
8f540f06 | 370 | return build_constructor (type, v); |
0fcedd9c JM |
371 | } |
372 | } | |
373 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
374 | { | |
375 | VEC(constructor_elt,gc) *v = NULL; | |
376 | ||
377 | /* Iterate over the array elements, building initializations. */ | |
378 | tree max_index = array_type_nelts (type); | |
379 | ||
380 | /* If we have an error_mark here, we should just return error mark | |
381 | as we don't know the size of the array yet. */ | |
382 | if (max_index == error_mark_node) | |
383 | return error_mark_node; | |
384 | gcc_assert (TREE_CODE (max_index) == INTEGER_CST); | |
385 | ||
386 | /* A zero-sized array, which is accepted as an extension, will | |
387 | have an upper bound of -1. */ | |
388 | if (!tree_int_cst_equal (max_index, integer_minus_one_node)) | |
389 | { | |
390 | constructor_elt *ce; | |
391 | ||
392 | v = VEC_alloc (constructor_elt, gc, 1); | |
393 | ce = VEC_quick_push (constructor_elt, v, NULL); | |
394 | ||
395 | /* If this is a one element array, we just use a regular init. */ | |
396 | if (tree_int_cst_equal (size_zero_node, max_index)) | |
397 | ce->index = size_zero_node; | |
398 | else | |
399 | ce->index = build2 (RANGE_EXPR, sizetype, size_zero_node, | |
400 | max_index); | |
401 | ||
8f540f06 | 402 | ce->value = build_value_init (TREE_TYPE (type)); |
9dbd4406 JM |
403 | |
404 | /* The gimplifier can't deal with a RANGE_EXPR of TARGET_EXPRs. */ | |
405 | gcc_assert (TREE_CODE (ce->value) != TARGET_EXPR | |
406 | && TREE_CODE (ce->value) != AGGR_INIT_EXPR); | |
0fcedd9c JM |
407 | } |
408 | ||
409 | /* Build a constructor to contain the initializations. */ | |
410 | return build_constructor (type, v); | |
411 | } | |
412 | ||
413 | return build_zero_init (type, NULL_TREE, /*static_storage_p=*/false); | |
414 | } | |
415 | ||
2282d28d MM |
416 | /* Initialize MEMBER, a FIELD_DECL, with INIT, a TREE_LIST of |
417 | arguments. If TREE_LIST is void_type_node, an empty initializer | |
418 | list was given; if NULL_TREE no initializer was given. */ | |
e92cc029 | 419 | |
8d08fdba | 420 | static void |
2282d28d | 421 | perform_member_init (tree member, tree init) |
8d08fdba MS |
422 | { |
423 | tree decl; | |
424 | tree type = TREE_TYPE (member); | |
2282d28d MM |
425 | |
426 | /* Effective C++ rule 12 requires that all data members be | |
427 | initialized. */ | |
9dbd4406 | 428 | if (warn_ecpp && init == NULL_TREE && TREE_CODE (type) != ARRAY_TYPE) |
b323323f | 429 | warning (OPT_Weffc__, "%J%qD should be initialized in the member initialization " |
2cfe82fe | 430 | "list", current_function_decl, member); |
2282d28d | 431 | |
2282d28d | 432 | /* Get an lvalue for the data member. */ |
50ad9642 MM |
433 | decl = build_class_member_access_expr (current_class_ref, member, |
434 | /*access_path=*/NULL_TREE, | |
5ade1ed2 DG |
435 | /*preserve_reference=*/true, |
436 | tf_warning_or_error); | |
2fbfe9b8 MS |
437 | if (decl == error_mark_node) |
438 | return; | |
439 | ||
9dbd4406 JM |
440 | if (init == void_type_node) |
441 | { | |
442 | /* mem() means value-initialization. */ | |
443 | if (TREE_CODE (type) == ARRAY_TYPE) | |
0f737a30 JJ |
444 | { |
445 | init = build_vec_init (decl, NULL_TREE, NULL_TREE, | |
446 | /*explicit_value_init_p=*/true, | |
447 | /* from_array=*/0, | |
448 | tf_warning_or_error); | |
449 | finish_expr_stmt (init); | |
450 | } | |
9dbd4406 JM |
451 | else |
452 | { | |
453 | if (TREE_CODE (type) == REFERENCE_TYPE) | |
0f737a30 JJ |
454 | permerror (input_location, "%Jvalue-initialization of %q#D, " |
455 | "which has reference type", | |
456 | current_function_decl, member); | |
457 | else | |
458 | { | |
459 | init = build2 (INIT_EXPR, type, decl, build_value_init (type)); | |
460 | finish_expr_stmt (init); | |
461 | } | |
9dbd4406 | 462 | } |
9dbd4406 | 463 | } |
6bdb8141 JM |
464 | /* Deal with this here, as we will get confused if we try to call the |
465 | assignment op for an anonymous union. This can happen in a | |
466 | synthesized copy constructor. */ | |
9dbd4406 | 467 | else if (ANON_AGGR_TYPE_P (type)) |
6bdb8141 | 468 | { |
ff9f1a5d MM |
469 | if (init) |
470 | { | |
f293ce4b | 471 | init = build2 (INIT_EXPR, type, decl, TREE_VALUE (init)); |
ff9f1a5d MM |
472 | finish_expr_stmt (init); |
473 | } | |
6bdb8141 | 474 | } |
92a62aad | 475 | else if (TYPE_NEEDS_CONSTRUCTING (type)) |
8d08fdba | 476 | { |
9dbd4406 | 477 | if (init != NULL_TREE |
8d08fdba | 478 | && TREE_CODE (type) == ARRAY_TYPE |
8d08fdba MS |
479 | && TREE_CHAIN (init) == NULL_TREE |
480 | && TREE_CODE (TREE_TYPE (TREE_VALUE (init))) == ARRAY_TYPE) | |
481 | { | |
482 | /* Initialization of one array from another. */ | |
a48cccea | 483 | finish_expr_stmt (build_vec_init (decl, NULL_TREE, TREE_VALUE (init), |
844ae01d | 484 | /*explicit_value_init_p=*/false, |
5ade1ed2 DG |
485 | /* from_array=*/1, |
486 | tf_warning_or_error)); | |
8d08fdba MS |
487 | } |
488 | else | |
b87d79e6 JM |
489 | { |
490 | if (CP_TYPE_CONST_P (type) | |
491 | && init == NULL_TREE | |
492 | && !type_has_user_provided_default_constructor (type)) | |
493 | /* TYPE_NEEDS_CONSTRUCTING can be set just because we have a | |
494 | vtable; still give this diagnostic. */ | |
cbe5f3b3 | 495 | permerror (input_location, "%Juninitialized member %qD with %<const%> type %qT", |
b87d79e6 JM |
496 | current_function_decl, member, type); |
497 | finish_expr_stmt (build_aggr_init (decl, init, 0, | |
498 | tf_warning_or_error)); | |
499 | } | |
8d08fdba MS |
500 | } |
501 | else | |
502 | { | |
503 | if (init == NULL_TREE) | |
504 | { | |
8d08fdba | 505 | /* member traversal: note it leaves init NULL */ |
9dbd4406 | 506 | if (TREE_CODE (type) == REFERENCE_TYPE) |
cbe5f3b3 | 507 | permerror (input_location, "%Juninitialized reference member %qD", |
37ec60ed | 508 | current_function_decl, member); |
58ec3cc5 | 509 | else if (CP_TYPE_CONST_P (type)) |
cbe5f3b3 | 510 | permerror (input_location, "%Juninitialized member %qD with %<const%> type %qT", |
37ec60ed | 511 | current_function_decl, member, type); |
8d08fdba MS |
512 | } |
513 | else if (TREE_CODE (init) == TREE_LIST) | |
c7b62f14 NS |
514 | /* There was an explicit member initialization. Do some work |
515 | in that case. */ | |
516 | init = build_x_compound_expr_from_list (init, "member initializer"); | |
8d08fdba | 517 | |
4f0aa416 | 518 | if (init) |
5ade1ed2 DG |
519 | finish_expr_stmt (cp_build_modify_expr (decl, INIT_EXPR, init, |
520 | tf_warning_or_error)); | |
8d08fdba | 521 | } |
eb66be0e | 522 | |
834c6dff | 523 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)) |
b7484fbe | 524 | { |
de22184b MS |
525 | tree expr; |
526 | ||
50ad9642 MM |
527 | expr = build_class_member_access_expr (current_class_ref, member, |
528 | /*access_path=*/NULL_TREE, | |
5ade1ed2 DG |
529 | /*preserve_reference=*/false, |
530 | tf_warning_or_error); | |
3ec6bad3 | 531 | expr = build_delete (type, expr, sfk_complete_destructor, |
b7484fbe MS |
532 | LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); |
533 | ||
534 | if (expr != error_mark_node) | |
659e5a7a | 535 | finish_eh_cleanup (expr); |
b7484fbe | 536 | } |
8d08fdba MS |
537 | } |
538 | ||
ff9f1a5d MM |
539 | /* Returns a TREE_LIST containing (as the TREE_PURPOSE of each node) all |
540 | the FIELD_DECLs on the TYPE_FIELDS list for T, in reverse order. */ | |
541 | ||
c8094d83 | 542 | static tree |
362efdc1 | 543 | build_field_list (tree t, tree list, int *uses_unions_p) |
ff9f1a5d MM |
544 | { |
545 | tree fields; | |
546 | ||
01c3fb15 JM |
547 | *uses_unions_p = 0; |
548 | ||
ff9f1a5d MM |
549 | /* Note whether or not T is a union. */ |
550 | if (TREE_CODE (t) == UNION_TYPE) | |
551 | *uses_unions_p = 1; | |
552 | ||
553 | for (fields = TYPE_FIELDS (t); fields; fields = TREE_CHAIN (fields)) | |
554 | { | |
555 | /* Skip CONST_DECLs for enumeration constants and so forth. */ | |
17bbb839 | 556 | if (TREE_CODE (fields) != FIELD_DECL || DECL_ARTIFICIAL (fields)) |
ff9f1a5d | 557 | continue; |
c8094d83 | 558 | |
ff9f1a5d MM |
559 | /* Keep track of whether or not any fields are unions. */ |
560 | if (TREE_CODE (TREE_TYPE (fields)) == UNION_TYPE) | |
561 | *uses_unions_p = 1; | |
562 | ||
563 | /* For an anonymous struct or union, we must recursively | |
564 | consider the fields of the anonymous type. They can be | |
565 | directly initialized from the constructor. */ | |
566 | if (ANON_AGGR_TYPE_P (TREE_TYPE (fields))) | |
567 | { | |
568 | /* Add this field itself. Synthesized copy constructors | |
569 | initialize the entire aggregate. */ | |
570 | list = tree_cons (fields, NULL_TREE, list); | |
571 | /* And now add the fields in the anonymous aggregate. */ | |
c8094d83 | 572 | list = build_field_list (TREE_TYPE (fields), list, |
ff9f1a5d MM |
573 | uses_unions_p); |
574 | } | |
575 | /* Add this field. */ | |
576 | else if (DECL_NAME (fields)) | |
577 | list = tree_cons (fields, NULL_TREE, list); | |
578 | } | |
579 | ||
580 | return list; | |
581 | } | |
582 | ||
2282d28d MM |
583 | /* The MEM_INITS are a TREE_LIST. The TREE_PURPOSE of each list gives |
584 | a FIELD_DECL or BINFO in T that needs initialization. The | |
585 | TREE_VALUE gives the initializer, or list of initializer arguments. | |
586 | ||
587 | Return a TREE_LIST containing all of the initializations required | |
588 | for T, in the order in which they should be performed. The output | |
589 | list has the same format as the input. */ | |
e92cc029 | 590 | |
8d08fdba | 591 | static tree |
2282d28d | 592 | sort_mem_initializers (tree t, tree mem_inits) |
8d08fdba | 593 | { |
ff9f1a5d | 594 | tree init; |
fa743e8c | 595 | tree base, binfo, base_binfo; |
2282d28d MM |
596 | tree sorted_inits; |
597 | tree next_subobject; | |
d4e6fecb | 598 | VEC(tree,gc) *vbases; |
2282d28d | 599 | int i; |
ff9f1a5d MM |
600 | int uses_unions_p; |
601 | ||
2282d28d MM |
602 | /* Build up a list of initializations. The TREE_PURPOSE of entry |
603 | will be the subobject (a FIELD_DECL or BINFO) to initialize. The | |
604 | TREE_VALUE will be the constructor arguments, or NULL if no | |
605 | explicit initialization was provided. */ | |
606 | sorted_inits = NULL_TREE; | |
c8094d83 | 607 | |
2282d28d | 608 | /* Process the virtual bases. */ |
9ba5ff0f NS |
609 | for (vbases = CLASSTYPE_VBASECLASSES (t), i = 0; |
610 | VEC_iterate (tree, vbases, i, base); i++) | |
58c42dc2 | 611 | sorted_inits = tree_cons (base, NULL_TREE, sorted_inits); |
c8094d83 | 612 | |
2282d28d | 613 | /* Process the direct bases. */ |
fa743e8c NS |
614 | for (binfo = TYPE_BINFO (t), i = 0; |
615 | BINFO_BASE_ITERATE (binfo, i, base_binfo); ++i) | |
616 | if (!BINFO_VIRTUAL_P (base_binfo)) | |
617 | sorted_inits = tree_cons (base_binfo, NULL_TREE, sorted_inits); | |
618 | ||
2282d28d MM |
619 | /* Process the non-static data members. */ |
620 | sorted_inits = build_field_list (t, sorted_inits, &uses_unions_p); | |
621 | /* Reverse the entire list of initializations, so that they are in | |
622 | the order that they will actually be performed. */ | |
623 | sorted_inits = nreverse (sorted_inits); | |
624 | ||
625 | /* If the user presented the initializers in an order different from | |
626 | that in which they will actually occur, we issue a warning. Keep | |
627 | track of the next subobject which can be explicitly initialized | |
628 | without issuing a warning. */ | |
629 | next_subobject = sorted_inits; | |
630 | ||
631 | /* Go through the explicit initializers, filling in TREE_PURPOSE in | |
632 | the SORTED_INITS. */ | |
633 | for (init = mem_inits; init; init = TREE_CHAIN (init)) | |
634 | { | |
635 | tree subobject; | |
636 | tree subobject_init; | |
637 | ||
638 | subobject = TREE_PURPOSE (init); | |
639 | ||
640 | /* If the explicit initializers are in sorted order, then | |
c8094d83 | 641 | SUBOBJECT will be NEXT_SUBOBJECT, or something following |
2282d28d | 642 | it. */ |
c8094d83 MS |
643 | for (subobject_init = next_subobject; |
644 | subobject_init; | |
2282d28d MM |
645 | subobject_init = TREE_CHAIN (subobject_init)) |
646 | if (TREE_PURPOSE (subobject_init) == subobject) | |
ff9f1a5d MM |
647 | break; |
648 | ||
2282d28d | 649 | /* Issue a warning if the explicit initializer order does not |
2cfe82fe | 650 | match that which will actually occur. |
0cbd7506 | 651 | ??? Are all these on the correct lines? */ |
2282d28d | 652 | if (warn_reorder && !subobject_init) |
ff9f1a5d | 653 | { |
2282d28d | 654 | if (TREE_CODE (TREE_PURPOSE (next_subobject)) == FIELD_DECL) |
b323323f | 655 | warning (OPT_Wreorder, "%q+D will be initialized after", |
dee15844 | 656 | TREE_PURPOSE (next_subobject)); |
2282d28d | 657 | else |
b323323f | 658 | warning (OPT_Wreorder, "base %qT will be initialized after", |
2282d28d MM |
659 | TREE_PURPOSE (next_subobject)); |
660 | if (TREE_CODE (subobject) == FIELD_DECL) | |
b323323f | 661 | warning (OPT_Wreorder, " %q+#D", subobject); |
2282d28d | 662 | else |
b323323f LM |
663 | warning (OPT_Wreorder, " base %qT", subobject); |
664 | warning (OPT_Wreorder, "%J when initialized here", current_function_decl); | |
ff9f1a5d | 665 | } |
b7484fbe | 666 | |
2282d28d MM |
667 | /* Look again, from the beginning of the list. */ |
668 | if (!subobject_init) | |
ff9f1a5d | 669 | { |
2282d28d MM |
670 | subobject_init = sorted_inits; |
671 | while (TREE_PURPOSE (subobject_init) != subobject) | |
672 | subobject_init = TREE_CHAIN (subobject_init); | |
ff9f1a5d | 673 | } |
c8094d83 | 674 | |
2282d28d MM |
675 | /* It is invalid to initialize the same subobject more than |
676 | once. */ | |
677 | if (TREE_VALUE (subobject_init)) | |
ff9f1a5d | 678 | { |
2282d28d | 679 | if (TREE_CODE (subobject) == FIELD_DECL) |
2cfe82fe ZW |
680 | error ("%Jmultiple initializations given for %qD", |
681 | current_function_decl, subobject); | |
2282d28d | 682 | else |
c8094d83 | 683 | error ("%Jmultiple initializations given for base %qT", |
2cfe82fe | 684 | current_function_decl, subobject); |
ff9f1a5d MM |
685 | } |
686 | ||
2282d28d MM |
687 | /* Record the initialization. */ |
688 | TREE_VALUE (subobject_init) = TREE_VALUE (init); | |
689 | next_subobject = subobject_init; | |
ff9f1a5d MM |
690 | } |
691 | ||
692 | /* [class.base.init] | |
b7484fbe | 693 | |
ff9f1a5d MM |
694 | If a ctor-initializer specifies more than one mem-initializer for |
695 | multiple members of the same union (including members of | |
696 | anonymous unions), the ctor-initializer is ill-formed. */ | |
697 | if (uses_unions_p) | |
698 | { | |
2282d28d MM |
699 | tree last_field = NULL_TREE; |
700 | for (init = sorted_inits; init; init = TREE_CHAIN (init)) | |
8d08fdba | 701 | { |
ff9f1a5d MM |
702 | tree field; |
703 | tree field_type; | |
704 | int done; | |
705 | ||
2282d28d | 706 | /* Skip uninitialized members and base classes. */ |
c8094d83 | 707 | if (!TREE_VALUE (init) |
2282d28d | 708 | || TREE_CODE (TREE_PURPOSE (init)) != FIELD_DECL) |
ff9f1a5d MM |
709 | continue; |
710 | /* See if this field is a member of a union, or a member of a | |
711 | structure contained in a union, etc. */ | |
712 | field = TREE_PURPOSE (init); | |
713 | for (field_type = DECL_CONTEXT (field); | |
714 | !same_type_p (field_type, t); | |
715 | field_type = TYPE_CONTEXT (field_type)) | |
716 | if (TREE_CODE (field_type) == UNION_TYPE) | |
717 | break; | |
718 | /* If this field is not a member of a union, skip it. */ | |
719 | if (TREE_CODE (field_type) != UNION_TYPE) | |
8d08fdba | 720 | continue; |
8d08fdba | 721 | |
ff9f1a5d MM |
722 | /* It's only an error if we have two initializers for the same |
723 | union type. */ | |
724 | if (!last_field) | |
6bdb8141 | 725 | { |
ff9f1a5d MM |
726 | last_field = field; |
727 | continue; | |
6bdb8141 | 728 | } |
8d08fdba | 729 | |
ff9f1a5d MM |
730 | /* See if LAST_FIELD and the field initialized by INIT are |
731 | members of the same union. If so, there's a problem, | |
732 | unless they're actually members of the same structure | |
733 | which is itself a member of a union. For example, given: | |
8d08fdba | 734 | |
ff9f1a5d MM |
735 | union { struct { int i; int j; }; }; |
736 | ||
737 | initializing both `i' and `j' makes sense. */ | |
738 | field_type = DECL_CONTEXT (field); | |
739 | done = 0; | |
740 | do | |
8d08fdba | 741 | { |
ff9f1a5d MM |
742 | tree last_field_type; |
743 | ||
744 | last_field_type = DECL_CONTEXT (last_field); | |
745 | while (1) | |
00595019 | 746 | { |
ff9f1a5d | 747 | if (same_type_p (last_field_type, field_type)) |
00595019 | 748 | { |
ff9f1a5d | 749 | if (TREE_CODE (field_type) == UNION_TYPE) |
2cfe82fe ZW |
750 | error ("%Jinitializations for multiple members of %qT", |
751 | current_function_decl, last_field_type); | |
ff9f1a5d MM |
752 | done = 1; |
753 | break; | |
00595019 | 754 | } |
8d08fdba | 755 | |
ff9f1a5d MM |
756 | if (same_type_p (last_field_type, t)) |
757 | break; | |
8d08fdba | 758 | |
ff9f1a5d MM |
759 | last_field_type = TYPE_CONTEXT (last_field_type); |
760 | } | |
c8094d83 | 761 | |
ff9f1a5d MM |
762 | /* If we've reached the outermost class, then we're |
763 | done. */ | |
764 | if (same_type_p (field_type, t)) | |
765 | break; | |
8d08fdba | 766 | |
ff9f1a5d | 767 | field_type = TYPE_CONTEXT (field_type); |
8d08fdba | 768 | } |
ff9f1a5d MM |
769 | while (!done); |
770 | ||
771 | last_field = field; | |
b7484fbe MS |
772 | } |
773 | } | |
8d08fdba | 774 | |
2282d28d | 775 | return sorted_inits; |
b7484fbe MS |
776 | } |
777 | ||
2282d28d MM |
778 | /* Initialize all bases and members of CURRENT_CLASS_TYPE. MEM_INITS |
779 | is a TREE_LIST giving the explicit mem-initializer-list for the | |
780 | constructor. The TREE_PURPOSE of each entry is a subobject (a | |
781 | FIELD_DECL or a BINFO) of the CURRENT_CLASS_TYPE. The TREE_VALUE | |
782 | is a TREE_LIST giving the arguments to the constructor or | |
783 | void_type_node for an empty list of arguments. */ | |
a9aedbc2 | 784 | |
3dbc07b6 | 785 | void |
2282d28d | 786 | emit_mem_initializers (tree mem_inits) |
8d08fdba | 787 | { |
72e4661a PC |
788 | /* We will already have issued an error message about the fact that |
789 | the type is incomplete. */ | |
790 | if (!COMPLETE_TYPE_P (current_class_type)) | |
791 | return; | |
c8094d83 | 792 | |
2282d28d MM |
793 | /* Sort the mem-initializers into the order in which the |
794 | initializations should be performed. */ | |
795 | mem_inits = sort_mem_initializers (current_class_type, mem_inits); | |
8d08fdba | 796 | |
1f5a253a | 797 | in_base_initializer = 1; |
c8094d83 | 798 | |
2282d28d | 799 | /* Initialize base classes. */ |
c8094d83 | 800 | while (mem_inits |
2282d28d | 801 | && TREE_CODE (TREE_PURPOSE (mem_inits)) != FIELD_DECL) |
8d08fdba | 802 | { |
2282d28d MM |
803 | tree subobject = TREE_PURPOSE (mem_inits); |
804 | tree arguments = TREE_VALUE (mem_inits); | |
805 | ||
8c95264b MLI |
806 | /* If these initializations are taking place in a copy constructor, |
807 | the base class should probably be explicitly initialized if there | |
808 | is a user-defined constructor in the base class (other than the | |
809 | default constructor, which will be called anyway). */ | |
c8094d83 | 810 | if (extra_warnings && !arguments |
2282d28d | 811 | && DECL_COPY_CONSTRUCTOR_P (current_function_decl) |
8c95264b | 812 | && type_has_user_nondefault_constructor (BINFO_TYPE (subobject))) |
b323323f | 813 | warning (OPT_Wextra, "%Jbase class %q#T should be explicitly initialized in the " |
2282d28d | 814 | "copy constructor", |
2cfe82fe | 815 | current_function_decl, BINFO_TYPE (subobject)); |
2282d28d | 816 | |
2282d28d | 817 | /* Initialize the base. */ |
809e3e7f | 818 | if (BINFO_VIRTUAL_P (subobject)) |
2282d28d MM |
819 | construct_virtual_base (subobject, arguments); |
820 | else | |
b7484fbe | 821 | { |
2282d28d | 822 | tree base_addr; |
c8094d83 | 823 | |
2282d28d MM |
824 | base_addr = build_base_path (PLUS_EXPR, current_class_ptr, |
825 | subobject, 1); | |
826 | expand_aggr_init_1 (subobject, NULL_TREE, | |
5ade1ed2 DG |
827 | cp_build_indirect_ref (base_addr, NULL, |
828 | tf_warning_or_error), | |
2282d28d | 829 | arguments, |
5ade1ed2 DG |
830 | LOOKUP_NORMAL, |
831 | tf_warning_or_error); | |
2282d28d | 832 | expand_cleanup_for_base (subobject, NULL_TREE); |
8d08fdba | 833 | } |
8d08fdba | 834 | |
2282d28d | 835 | mem_inits = TREE_CHAIN (mem_inits); |
8d08fdba | 836 | } |
1f5a253a | 837 | in_base_initializer = 0; |
8d08fdba | 838 | |
2282d28d | 839 | /* Initialize the vptrs. */ |
cf2e003b | 840 | initialize_vtbl_ptrs (current_class_ptr); |
c8094d83 | 841 | |
2282d28d MM |
842 | /* Initialize the data members. */ |
843 | while (mem_inits) | |
8d08fdba | 844 | { |
2282d28d MM |
845 | perform_member_init (TREE_PURPOSE (mem_inits), |
846 | TREE_VALUE (mem_inits)); | |
847 | mem_inits = TREE_CHAIN (mem_inits); | |
b7484fbe | 848 | } |
8d08fdba MS |
849 | } |
850 | ||
3ec6bad3 MM |
851 | /* Returns the address of the vtable (i.e., the value that should be |
852 | assigned to the vptr) for BINFO. */ | |
853 | ||
854 | static tree | |
362efdc1 | 855 | build_vtbl_address (tree binfo) |
3ec6bad3 | 856 | { |
9965d119 | 857 | tree binfo_for = binfo; |
3ec6bad3 MM |
858 | tree vtbl; |
859 | ||
fc6633e0 | 860 | if (BINFO_VPTR_INDEX (binfo) && BINFO_VIRTUAL_P (binfo)) |
9965d119 NS |
861 | /* If this is a virtual primary base, then the vtable we want to store |
862 | is that for the base this is being used as the primary base of. We | |
863 | can't simply skip the initialization, because we may be expanding the | |
864 | inits of a subobject constructor where the virtual base layout | |
865 | can be different. */ | |
fc6633e0 NS |
866 | while (BINFO_PRIMARY_P (binfo_for)) |
867 | binfo_for = BINFO_INHERITANCE_CHAIN (binfo_for); | |
9965d119 | 868 | |
3ec6bad3 MM |
869 | /* Figure out what vtable BINFO's vtable is based on, and mark it as |
870 | used. */ | |
9965d119 | 871 | vtbl = get_vtbl_decl_for_binfo (binfo_for); |
3ec6bad3 MM |
872 | TREE_USED (vtbl) = 1; |
873 | ||
874 | /* Now compute the address to use when initializing the vptr. */ | |
6de9cd9a | 875 | vtbl = unshare_expr (BINFO_VTABLE (binfo_for)); |
3ec6bad3 | 876 | if (TREE_CODE (vtbl) == VAR_DECL) |
6de9cd9a | 877 | vtbl = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (vtbl)), vtbl); |
3ec6bad3 MM |
878 | |
879 | return vtbl; | |
880 | } | |
881 | ||
8d08fdba MS |
882 | /* This code sets up the virtual function tables appropriate for |
883 | the pointer DECL. It is a one-ply initialization. | |
884 | ||
885 | BINFO is the exact type that DECL is supposed to be. In | |
886 | multiple inheritance, this might mean "C's A" if C : A, B. */ | |
e92cc029 | 887 | |
8926095f | 888 | static void |
362efdc1 | 889 | expand_virtual_init (tree binfo, tree decl) |
8d08fdba | 890 | { |
8d08fdba | 891 | tree vtbl, vtbl_ptr; |
3ec6bad3 | 892 | tree vtt_index; |
8d08fdba | 893 | |
3ec6bad3 MM |
894 | /* Compute the initializer for vptr. */ |
895 | vtbl = build_vtbl_address (binfo); | |
896 | ||
3461fba7 NS |
897 | /* We may get this vptr from a VTT, if this is a subobject |
898 | constructor or subobject destructor. */ | |
3ec6bad3 MM |
899 | vtt_index = BINFO_VPTR_INDEX (binfo); |
900 | if (vtt_index) | |
901 | { | |
902 | tree vtbl2; | |
903 | tree vtt_parm; | |
904 | ||
905 | /* Compute the value to use, when there's a VTT. */ | |
e0fff4b3 | 906 | vtt_parm = current_vtt_parm; |
5be014d5 | 907 | vtbl2 = build2 (POINTER_PLUS_EXPR, |
c8094d83 | 908 | TREE_TYPE (vtt_parm), |
f293ce4b RS |
909 | vtt_parm, |
910 | vtt_index); | |
5ade1ed2 | 911 | vtbl2 = cp_build_indirect_ref (vtbl2, NULL, tf_warning_or_error); |
6de9cd9a | 912 | vtbl2 = convert (TREE_TYPE (vtbl), vtbl2); |
3ec6bad3 MM |
913 | |
914 | /* The actual initializer is the VTT value only in the subobject | |
915 | constructor. In maybe_clone_body we'll substitute NULL for | |
916 | the vtt_parm in the case of the non-subobject constructor. */ | |
c8094d83 MS |
917 | vtbl = build3 (COND_EXPR, |
918 | TREE_TYPE (vtbl), | |
f293ce4b RS |
919 | build2 (EQ_EXPR, boolean_type_node, |
920 | current_in_charge_parm, integer_zero_node), | |
c8094d83 | 921 | vtbl2, |
f293ce4b | 922 | vtbl); |
3ec6bad3 | 923 | } |
70ae3201 MM |
924 | |
925 | /* Compute the location of the vtpr. */ | |
5ade1ed2 DG |
926 | vtbl_ptr = build_vfield_ref (cp_build_indirect_ref (decl, NULL, |
927 | tf_warning_or_error), | |
338d90b8 | 928 | TREE_TYPE (binfo)); |
50bc768d | 929 | gcc_assert (vtbl_ptr != error_mark_node); |
8d08fdba | 930 | |
70ae3201 | 931 | /* Assign the vtable to the vptr. */ |
6060a796 | 932 | vtbl = convert_force (TREE_TYPE (vtbl_ptr), vtbl, 0); |
5ade1ed2 DG |
933 | finish_expr_stmt (cp_build_modify_expr (vtbl_ptr, NOP_EXPR, vtbl, |
934 | tf_warning_or_error)); | |
8d08fdba MS |
935 | } |
936 | ||
f33e32a8 MM |
937 | /* If an exception is thrown in a constructor, those base classes already |
938 | constructed must be destroyed. This function creates the cleanup | |
0b8a1e58 | 939 | for BINFO, which has just been constructed. If FLAG is non-NULL, |
838dfd8a | 940 | it is a DECL which is nonzero when this base needs to be |
0b8a1e58 | 941 | destroyed. */ |
f33e32a8 MM |
942 | |
943 | static void | |
362efdc1 | 944 | expand_cleanup_for_base (tree binfo, tree flag) |
f33e32a8 MM |
945 | { |
946 | tree expr; | |
947 | ||
834c6dff | 948 | if (TYPE_HAS_TRIVIAL_DESTRUCTOR (BINFO_TYPE (binfo))) |
f33e32a8 MM |
949 | return; |
950 | ||
0b8a1e58 | 951 | /* Call the destructor. */ |
c8094d83 | 952 | expr = build_special_member_call (current_class_ref, |
4ba126e4 MM |
953 | base_dtor_identifier, |
954 | NULL_TREE, | |
955 | binfo, | |
5ade1ed2 DG |
956 | LOOKUP_NORMAL | LOOKUP_NONVIRTUAL, |
957 | tf_warning_or_error); | |
0b8a1e58 | 958 | if (flag) |
7866705a | 959 | expr = fold_build3 (COND_EXPR, void_type_node, |
ba47d38d | 960 | c_common_truthvalue_conversion (input_location, flag), |
7866705a | 961 | expr, integer_zero_node); |
0b8a1e58 | 962 | |
659e5a7a | 963 | finish_eh_cleanup (expr); |
f33e32a8 MM |
964 | } |
965 | ||
2282d28d MM |
966 | /* Construct the virtual base-class VBASE passing the ARGUMENTS to its |
967 | constructor. */ | |
e92cc029 | 968 | |
8d08fdba | 969 | static void |
2282d28d | 970 | construct_virtual_base (tree vbase, tree arguments) |
8d08fdba | 971 | { |
2282d28d | 972 | tree inner_if_stmt; |
2282d28d | 973 | tree exp; |
c8094d83 | 974 | tree flag; |
2282d28d MM |
975 | |
976 | /* If there are virtual base classes with destructors, we need to | |
977 | emit cleanups to destroy them if an exception is thrown during | |
978 | the construction process. These exception regions (i.e., the | |
979 | period during which the cleanups must occur) begin from the time | |
980 | the construction is complete to the end of the function. If we | |
981 | create a conditional block in which to initialize the | |
982 | base-classes, then the cleanup region for the virtual base begins | |
983 | inside a block, and ends outside of that block. This situation | |
984 | confuses the sjlj exception-handling code. Therefore, we do not | |
985 | create a single conditional block, but one for each | |
986 | initialization. (That way the cleanup regions always begin | |
3b426391 | 987 | in the outer block.) We trust the back end to figure out |
2282d28d MM |
988 | that the FLAG will not change across initializations, and |
989 | avoid doing multiple tests. */ | |
990 | flag = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); | |
991 | inner_if_stmt = begin_if_stmt (); | |
992 | finish_if_stmt_cond (flag, inner_if_stmt); | |
2282d28d MM |
993 | |
994 | /* Compute the location of the virtual base. If we're | |
995 | constructing virtual bases, then we must be the most derived | |
996 | class. Therefore, we don't have to look up the virtual base; | |
997 | we already know where it is. */ | |
22ed7e5f MM |
998 | exp = convert_to_base_statically (current_class_ref, vbase); |
999 | ||
c8094d83 | 1000 | expand_aggr_init_1 (vbase, current_class_ref, exp, arguments, |
5ade1ed2 | 1001 | LOOKUP_COMPLAIN, tf_warning_or_error); |
2282d28d | 1002 | finish_then_clause (inner_if_stmt); |
325c3691 | 1003 | finish_if_stmt (inner_if_stmt); |
2282d28d MM |
1004 | |
1005 | expand_cleanup_for_base (vbase, flag); | |
8d08fdba MS |
1006 | } |
1007 | ||
2ee887f2 | 1008 | /* Find the context in which this FIELD can be initialized. */ |
e92cc029 | 1009 | |
2ee887f2 | 1010 | static tree |
362efdc1 | 1011 | initializing_context (tree field) |
2ee887f2 MS |
1012 | { |
1013 | tree t = DECL_CONTEXT (field); | |
1014 | ||
1015 | /* Anonymous union members can be initialized in the first enclosing | |
1016 | non-anonymous union context. */ | |
6bdb8141 | 1017 | while (t && ANON_AGGR_TYPE_P (t)) |
2ee887f2 MS |
1018 | t = TYPE_CONTEXT (t); |
1019 | return t; | |
1020 | } | |
1021 | ||
8d08fdba MS |
1022 | /* Function to give error message if member initialization specification |
1023 | is erroneous. FIELD is the member we decided to initialize. | |
1024 | TYPE is the type for which the initialization is being performed. | |
72b7eeff | 1025 | FIELD must be a member of TYPE. |
c8094d83 | 1026 | |
8d08fdba MS |
1027 | MEMBER_NAME is the name of the member. */ |
1028 | ||
1029 | static int | |
362efdc1 | 1030 | member_init_ok_or_else (tree field, tree type, tree member_name) |
8d08fdba MS |
1031 | { |
1032 | if (field == error_mark_node) | |
1033 | return 0; | |
a723baf1 | 1034 | if (!field) |
8d08fdba | 1035 | { |
15a7ee29 | 1036 | error ("class %qT does not have any field named %qD", type, |
a723baf1 | 1037 | member_name); |
8d08fdba MS |
1038 | return 0; |
1039 | } | |
a723baf1 | 1040 | if (TREE_CODE (field) == VAR_DECL) |
b7484fbe | 1041 | { |
15a7ee29 | 1042 | error ("%q#D is a static data member; it can only be " |
a723baf1 MM |
1043 | "initialized at its definition", |
1044 | field); | |
1045 | return 0; | |
1046 | } | |
1047 | if (TREE_CODE (field) != FIELD_DECL) | |
1048 | { | |
15a7ee29 | 1049 | error ("%q#D is not a non-static data member of %qT", |
a723baf1 MM |
1050 | field, type); |
1051 | return 0; | |
1052 | } | |
1053 | if (initializing_context (field) != type) | |
1054 | { | |
15a7ee29 | 1055 | error ("class %qT does not have any field named %qD", type, |
a723baf1 | 1056 | member_name); |
b7484fbe MS |
1057 | return 0; |
1058 | } | |
1059 | ||
8d08fdba MS |
1060 | return 1; |
1061 | } | |
1062 | ||
2282d28d MM |
1063 | /* NAME is a FIELD_DECL, an IDENTIFIER_NODE which names a field, or it |
1064 | is a _TYPE node or TYPE_DECL which names a base for that type. | |
1f5a253a NS |
1065 | Check the validity of NAME, and return either the base _TYPE, base |
1066 | binfo, or the FIELD_DECL of the member. If NAME is invalid, return | |
2282d28d | 1067 | NULL_TREE and issue a diagnostic. |
8d08fdba | 1068 | |
36a68fe7 NS |
1069 | An old style unnamed direct single base construction is permitted, |
1070 | where NAME is NULL. */ | |
8d08fdba | 1071 | |
fd74ca0b | 1072 | tree |
1f5a253a | 1073 | expand_member_init (tree name) |
8d08fdba | 1074 | { |
2282d28d MM |
1075 | tree basetype; |
1076 | tree field; | |
8d08fdba | 1077 | |
2282d28d | 1078 | if (!current_class_ref) |
fd74ca0b | 1079 | return NULL_TREE; |
8d08fdba | 1080 | |
36a68fe7 | 1081 | if (!name) |
90418208 | 1082 | { |
36a68fe7 NS |
1083 | /* This is an obsolete unnamed base class initializer. The |
1084 | parser will already have warned about its use. */ | |
604a3205 | 1085 | switch (BINFO_N_BASE_BINFOS (TYPE_BINFO (current_class_type))) |
36a68fe7 NS |
1086 | { |
1087 | case 0: | |
15a7ee29 | 1088 | error ("unnamed initializer for %qT, which has no base classes", |
2282d28d | 1089 | current_class_type); |
36a68fe7 NS |
1090 | return NULL_TREE; |
1091 | case 1: | |
604a3205 NS |
1092 | basetype = BINFO_TYPE |
1093 | (BINFO_BASE_BINFO (TYPE_BINFO (current_class_type), 0)); | |
36a68fe7 NS |
1094 | break; |
1095 | default: | |
15a7ee29 | 1096 | error ("unnamed initializer for %qT, which uses multiple inheritance", |
2282d28d | 1097 | current_class_type); |
36a68fe7 NS |
1098 | return NULL_TREE; |
1099 | } | |
90418208 | 1100 | } |
36a68fe7 | 1101 | else if (TYPE_P (name)) |
be99da77 | 1102 | { |
a82d6da5 | 1103 | basetype = TYPE_MAIN_VARIANT (name); |
36a68fe7 | 1104 | name = TYPE_NAME (name); |
be99da77 | 1105 | } |
36a68fe7 NS |
1106 | else if (TREE_CODE (name) == TYPE_DECL) |
1107 | basetype = TYPE_MAIN_VARIANT (TREE_TYPE (name)); | |
2282d28d MM |
1108 | else |
1109 | basetype = NULL_TREE; | |
8d08fdba | 1110 | |
36a68fe7 | 1111 | if (basetype) |
41efda8f | 1112 | { |
d9148cf4 MM |
1113 | tree class_binfo; |
1114 | tree direct_binfo; | |
1115 | tree virtual_binfo; | |
1116 | int i; | |
2282d28d | 1117 | |
36a68fe7 | 1118 | if (current_template_parms) |
1f5a253a | 1119 | return basetype; |
2282d28d | 1120 | |
d9148cf4 MM |
1121 | class_binfo = TYPE_BINFO (current_class_type); |
1122 | direct_binfo = NULL_TREE; | |
1123 | virtual_binfo = NULL_TREE; | |
1124 | ||
1125 | /* Look for a direct base. */ | |
fa743e8c | 1126 | for (i = 0; BINFO_BASE_ITERATE (class_binfo, i, direct_binfo); ++i) |
539ed333 | 1127 | if (SAME_BINFO_TYPE_P (BINFO_TYPE (direct_binfo), basetype)) |
fa743e8c NS |
1128 | break; |
1129 | ||
d9148cf4 MM |
1130 | /* Look for a virtual base -- unless the direct base is itself |
1131 | virtual. */ | |
809e3e7f | 1132 | if (!direct_binfo || !BINFO_VIRTUAL_P (direct_binfo)) |
58c42dc2 | 1133 | virtual_binfo = binfo_for_vbase (basetype, current_class_type); |
d9148cf4 MM |
1134 | |
1135 | /* [class.base.init] | |
c8094d83 | 1136 | |
0cbd7506 | 1137 | If a mem-initializer-id is ambiguous because it designates |
d9148cf4 MM |
1138 | both a direct non-virtual base class and an inherited virtual |
1139 | base class, the mem-initializer is ill-formed. */ | |
1140 | if (direct_binfo && virtual_binfo) | |
1141 | { | |
15a7ee29 | 1142 | error ("%qD is both a direct base and an indirect virtual base", |
d9148cf4 MM |
1143 | basetype); |
1144 | return NULL_TREE; | |
1145 | } | |
1146 | ||
1147 | if (!direct_binfo && !virtual_binfo) | |
8d08fdba | 1148 | { |
5775a06a | 1149 | if (CLASSTYPE_VBASECLASSES (current_class_type)) |
c3115fd2 MM |
1150 | error ("type %qT is not a direct or virtual base of %qT", |
1151 | basetype, current_class_type); | |
41efda8f | 1152 | else |
c3115fd2 MM |
1153 | error ("type %qT is not a direct base of %qT", |
1154 | basetype, current_class_type); | |
fd74ca0b | 1155 | return NULL_TREE; |
41efda8f | 1156 | } |
d9148cf4 MM |
1157 | |
1158 | return direct_binfo ? direct_binfo : virtual_binfo; | |
41efda8f MM |
1159 | } |
1160 | else | |
1161 | { | |
2282d28d | 1162 | if (TREE_CODE (name) == IDENTIFIER_NODE) |
86ac0575 | 1163 | field = lookup_field (current_class_type, name, 1, false); |
2282d28d MM |
1164 | else |
1165 | field = name; | |
8d08fdba | 1166 | |
2282d28d | 1167 | if (member_init_ok_or_else (field, current_class_type, name)) |
1f5a253a | 1168 | return field; |
41efda8f | 1169 | } |
fd74ca0b | 1170 | |
2282d28d | 1171 | return NULL_TREE; |
8d08fdba MS |
1172 | } |
1173 | ||
1174 | /* This is like `expand_member_init', only it stores one aggregate | |
1175 | value into another. | |
1176 | ||
1177 | INIT comes in two flavors: it is either a value which | |
1178 | is to be stored in EXP, or it is a parameter list | |
1179 | to go to a constructor, which will operate on EXP. | |
f30432d7 MS |
1180 | If INIT is not a parameter list for a constructor, then set |
1181 | LOOKUP_ONLYCONVERTING. | |
6060a796 MS |
1182 | If FLAGS is LOOKUP_ONLYCONVERTING then it is the = init form of |
1183 | the initializer, if FLAGS is 0, then it is the (init) form. | |
8d08fdba | 1184 | If `init' is a CONSTRUCTOR, then we emit a warning message, |
59be0cdd | 1185 | explaining that such initializations are invalid. |
8d08fdba | 1186 | |
8d08fdba MS |
1187 | If INIT resolves to a CALL_EXPR which happens to return |
1188 | something of the type we are looking for, then we know | |
1189 | that we can safely use that call to perform the | |
1190 | initialization. | |
1191 | ||
1192 | The virtual function table pointer cannot be set up here, because | |
1193 | we do not really know its type. | |
1194 | ||
8d08fdba MS |
1195 | This never calls operator=(). |
1196 | ||
1197 | When initializing, nothing is CONST. | |
1198 | ||
1199 | A default copy constructor may have to be used to perform the | |
1200 | initialization. | |
1201 | ||
1202 | A constructor or a conversion operator may have to be used to | |
e92cc029 | 1203 | perform the initialization, but not both, as it would be ambiguous. */ |
8d08fdba | 1204 | |
f1dedc31 | 1205 | tree |
5ade1ed2 | 1206 | build_aggr_init (tree exp, tree init, int flags, tsubst_flags_t complain) |
8d08fdba | 1207 | { |
f1dedc31 MM |
1208 | tree stmt_expr; |
1209 | tree compound_stmt; | |
1210 | int destroy_temps; | |
8d08fdba MS |
1211 | tree type = TREE_TYPE (exp); |
1212 | int was_const = TREE_READONLY (exp); | |
f30432d7 | 1213 | int was_volatile = TREE_THIS_VOLATILE (exp); |
2a3398e1 | 1214 | int is_global; |
8d08fdba MS |
1215 | |
1216 | if (init == error_mark_node) | |
f1dedc31 | 1217 | return error_mark_node; |
8d08fdba MS |
1218 | |
1219 | TREE_READONLY (exp) = 0; | |
f30432d7 MS |
1220 | TREE_THIS_VOLATILE (exp) = 0; |
1221 | ||
1222 | if (init && TREE_CODE (init) != TREE_LIST) | |
1223 | flags |= LOOKUP_ONLYCONVERTING; | |
8d08fdba MS |
1224 | |
1225 | if (TREE_CODE (type) == ARRAY_TYPE) | |
1226 | { | |
671cb993 MM |
1227 | tree itype; |
1228 | ||
92a62aad MM |
1229 | /* An array may not be initialized use the parenthesized |
1230 | initialization form -- unless the initializer is "()". */ | |
1231 | if (init && TREE_CODE (init) == TREE_LIST) | |
8d08fdba | 1232 | { |
5ade1ed2 DG |
1233 | if (complain & tf_error) |
1234 | error ("bad array initializer"); | |
f1dedc31 | 1235 | return error_mark_node; |
8d08fdba | 1236 | } |
92a62aad MM |
1237 | /* Must arrange to initialize each element of EXP |
1238 | from elements of INIT. */ | |
671cb993 | 1239 | itype = init ? TREE_TYPE (init) : NULL_TREE; |
89d684bb | 1240 | if (cp_type_quals (type) != TYPE_UNQUALIFIED) |
b2153b98 KL |
1241 | TREE_TYPE (exp) = TYPE_MAIN_VARIANT (type); |
1242 | if (itype && cp_type_quals (itype) != TYPE_UNQUALIFIED) | |
92a62aad | 1243 | itype = TREE_TYPE (init) = TYPE_MAIN_VARIANT (itype); |
a48cccea | 1244 | stmt_expr = build_vec_init (exp, NULL_TREE, init, |
844ae01d | 1245 | /*explicit_value_init_p=*/false, |
92a62aad | 1246 | itype && same_type_p (itype, |
5ade1ed2 DG |
1247 | TREE_TYPE (exp)), |
1248 | complain); | |
8d08fdba | 1249 | TREE_READONLY (exp) = was_const; |
f30432d7 | 1250 | TREE_THIS_VOLATILE (exp) = was_volatile; |
8d08fdba | 1251 | TREE_TYPE (exp) = type; |
f376e137 MS |
1252 | if (init) |
1253 | TREE_TYPE (init) = itype; | |
f1dedc31 | 1254 | return stmt_expr; |
8d08fdba MS |
1255 | } |
1256 | ||
1257 | if (TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == PARM_DECL) | |
f4f206f4 | 1258 | /* Just know that we've seen something for this node. */ |
8d08fdba MS |
1259 | TREE_USED (exp) = 1; |
1260 | ||
2a3398e1 | 1261 | is_global = begin_init_stmts (&stmt_expr, &compound_stmt); |
f2c5f623 | 1262 | destroy_temps = stmts_are_full_exprs_p (); |
ae499cce | 1263 | current_stmt_tree ()->stmts_are_full_exprs_p = 0; |
8d08fdba | 1264 | expand_aggr_init_1 (TYPE_BINFO (type), exp, exp, |
5ade1ed2 | 1265 | init, LOOKUP_NORMAL|flags, complain); |
2a3398e1 | 1266 | stmt_expr = finish_init_stmts (is_global, stmt_expr, compound_stmt); |
ae499cce | 1267 | current_stmt_tree ()->stmts_are_full_exprs_p = destroy_temps; |
8d08fdba | 1268 | TREE_READONLY (exp) = was_const; |
f30432d7 | 1269 | TREE_THIS_VOLATILE (exp) = was_volatile; |
f1dedc31 MM |
1270 | |
1271 | return stmt_expr; | |
8d08fdba MS |
1272 | } |
1273 | ||
1274 | static void | |
5ade1ed2 DG |
1275 | expand_default_init (tree binfo, tree true_exp, tree exp, tree init, int flags, |
1276 | tsubst_flags_t complain) | |
8d08fdba | 1277 | { |
fc378698 | 1278 | tree type = TREE_TYPE (exp); |
9eb71d8c | 1279 | tree ctor_name; |
fc378698 | 1280 | |
8d08fdba MS |
1281 | /* It fails because there may not be a constructor which takes |
1282 | its own type as the first (or only parameter), but which does | |
1283 | take other types via a conversion. So, if the thing initializing | |
1284 | the expression is a unit element of type X, first try X(X&), | |
1285 | followed by initialization by X. If neither of these work | |
1286 | out, then look hard. */ | |
1287 | tree rval; | |
1288 | tree parms; | |
8d08fdba | 1289 | |
277294d7 | 1290 | if (init && TREE_CODE (init) != TREE_LIST |
faf5394a MS |
1291 | && (flags & LOOKUP_ONLYCONVERTING)) |
1292 | { | |
1293 | /* Base subobjects should only get direct-initialization. */ | |
8dc2b103 | 1294 | gcc_assert (true_exp == exp); |
faf5394a | 1295 | |
c37dc68e JM |
1296 | if (flags & DIRECT_BIND) |
1297 | /* Do nothing. We hit this in two cases: Reference initialization, | |
1298 | where we aren't initializing a real variable, so we don't want | |
1299 | to run a new constructor; and catching an exception, where we | |
1300 | have already built up the constructor call so we could wrap it | |
1301 | in an exception region. */; | |
09357846 JM |
1302 | else if (BRACE_ENCLOSED_INITIALIZER_P (init) |
1303 | && CP_AGGREGATE_TYPE_P (type)) | |
8e3df2de | 1304 | { |
b216f69b | 1305 | /* A brace-enclosed initializer for an aggregate. */ |
4038c495 | 1306 | init = digest_init (type, init); |
8e3df2de | 1307 | } |
c37dc68e | 1308 | else |
37c46b43 | 1309 | init = ocp_convert (type, init, CONV_IMPLICIT|CONV_FORCE_TEMP, flags); |
faf5394a | 1310 | |
4e8dca1c JM |
1311 | if (TREE_CODE (init) == MUST_NOT_THROW_EXPR) |
1312 | /* We need to protect the initialization of a catch parm with a | |
1313 | call to terminate(), which shows up as a MUST_NOT_THROW_EXPR | |
c7ae64f2 | 1314 | around the TARGET_EXPR for the copy constructor. See |
4e8dca1c JM |
1315 | initialize_handler_parm. */ |
1316 | { | |
f293ce4b RS |
1317 | TREE_OPERAND (init, 0) = build2 (INIT_EXPR, TREE_TYPE (exp), exp, |
1318 | TREE_OPERAND (init, 0)); | |
4e8dca1c JM |
1319 | TREE_TYPE (init) = void_type_node; |
1320 | } | |
c7ae64f2 | 1321 | else |
f293ce4b | 1322 | init = build2 (INIT_EXPR, TREE_TYPE (exp), exp, init); |
c7ae64f2 | 1323 | TREE_SIDE_EFFECTS (init) = 1; |
f1dedc31 | 1324 | finish_expr_stmt (init); |
faf5394a MS |
1325 | return; |
1326 | } | |
1327 | ||
b7484fbe MS |
1328 | if (init == NULL_TREE |
1329 | || (TREE_CODE (init) == TREE_LIST && ! TREE_TYPE (init))) | |
8d08fdba MS |
1330 | { |
1331 | parms = init; | |
db5ae43f MS |
1332 | if (parms) |
1333 | init = TREE_VALUE (parms); | |
8d08fdba | 1334 | } |
8d08fdba | 1335 | else |
051e6fd7 | 1336 | parms = build_tree_list (NULL_TREE, init); |
8d08fdba | 1337 | |
9eb71d8c MM |
1338 | if (true_exp == exp) |
1339 | ctor_name = complete_ctor_identifier; | |
1340 | else | |
1341 | ctor_name = base_ctor_identifier; | |
8d08fdba | 1342 | |
5ade1ed2 DG |
1343 | rval = build_special_member_call (exp, ctor_name, parms, binfo, flags, |
1344 | complain); | |
25eb19ff | 1345 | if (TREE_SIDE_EFFECTS (rval)) |
5ade1ed2 | 1346 | finish_expr_stmt (convert_to_void (rval, NULL, complain)); |
8d08fdba MS |
1347 | } |
1348 | ||
1349 | /* This function is responsible for initializing EXP with INIT | |
1350 | (if any). | |
1351 | ||
1352 | BINFO is the binfo of the type for who we are performing the | |
1353 | initialization. For example, if W is a virtual base class of A and B, | |
1354 | and C : A, B. | |
1355 | If we are initializing B, then W must contain B's W vtable, whereas | |
1356 | were we initializing C, W must contain C's W vtable. | |
1357 | ||
1358 | TRUE_EXP is nonzero if it is the true expression being initialized. | |
1359 | In this case, it may be EXP, or may just contain EXP. The reason we | |
1360 | need this is because if EXP is a base element of TRUE_EXP, we | |
1361 | don't necessarily know by looking at EXP where its virtual | |
1362 | baseclass fields should really be pointing. But we do know | |
1363 | from TRUE_EXP. In constructors, we don't know anything about | |
1364 | the value being initialized. | |
1365 | ||
9f880ef9 MM |
1366 | FLAGS is just passed to `build_new_method_call'. See that function |
1367 | for its description. */ | |
8d08fdba MS |
1368 | |
1369 | static void | |
5ade1ed2 DG |
1370 | expand_aggr_init_1 (tree binfo, tree true_exp, tree exp, tree init, int flags, |
1371 | tsubst_flags_t complain) | |
8d08fdba MS |
1372 | { |
1373 | tree type = TREE_TYPE (exp); | |
8d08fdba | 1374 | |
50bc768d NS |
1375 | gcc_assert (init != error_mark_node && type != error_mark_node); |
1376 | gcc_assert (building_stmt_tree ()); | |
8d08fdba MS |
1377 | |
1378 | /* Use a function returning the desired type to initialize EXP for us. | |
1379 | If the function is a constructor, and its first argument is | |
1380 | NULL_TREE, know that it was meant for us--just slide exp on | |
1381 | in and expand the constructor. Constructors now come | |
1382 | as TARGET_EXPRs. */ | |
faf5394a MS |
1383 | |
1384 | if (init && TREE_CODE (exp) == VAR_DECL | |
3b2db49f | 1385 | && COMPOUND_LITERAL_P (init)) |
faf5394a | 1386 | { |
f1dedc31 | 1387 | /* If store_init_value returns NULL_TREE, the INIT has been |
3b2db49f | 1388 | recorded as the DECL_INITIAL for EXP. That means there's |
f1dedc31 | 1389 | nothing more we have to do. */ |
25ebb82a RH |
1390 | init = store_init_value (exp, init); |
1391 | if (init) | |
1392 | finish_expr_stmt (init); | |
faf5394a MS |
1393 | return; |
1394 | } | |
1395 | ||
fd97a96a JM |
1396 | /* If an explicit -- but empty -- initializer list was present, |
1397 | that's value-initialization. */ | |
1398 | if (init == void_type_node) | |
1399 | { | |
1400 | /* If there's a user-provided constructor, we just call that. */ | |
1401 | if (type_has_user_provided_constructor (type)) | |
1402 | /* Fall through. */; | |
1403 | /* If there isn't, but we still need to call the constructor, | |
1404 | zero out the object first. */ | |
1405 | else if (TYPE_NEEDS_CONSTRUCTING (type)) | |
1406 | { | |
1407 | init = build_zero_init (type, NULL_TREE, /*static_storage_p=*/false); | |
1408 | init = build2 (INIT_EXPR, type, exp, init); | |
1409 | finish_expr_stmt (init); | |
1410 | /* And then call the constructor. */ | |
1411 | } | |
1412 | /* If we don't need to mess with the constructor at all, | |
1413 | then just zero out the object and we're done. */ | |
1414 | else | |
1415 | { | |
1416 | init = build2 (INIT_EXPR, type, exp, build_value_init_noctor (type)); | |
1417 | finish_expr_stmt (init); | |
1418 | return; | |
1419 | } | |
1420 | init = NULL_TREE; | |
1421 | } | |
1422 | ||
9e9ff709 MS |
1423 | /* We know that expand_default_init can handle everything we want |
1424 | at this point. */ | |
5ade1ed2 | 1425 | expand_default_init (binfo, true_exp, exp, init, flags, complain); |
8d08fdba MS |
1426 | } |
1427 | ||
9e1e64ec | 1428 | /* Report an error if TYPE is not a user-defined, class type. If |
be99da77 | 1429 | OR_ELSE is nonzero, give an error message. */ |
e92cc029 | 1430 | |
be99da77 | 1431 | int |
9e1e64ec | 1432 | is_class_type (tree type, int or_else) |
be99da77 MS |
1433 | { |
1434 | if (type == error_mark_node) | |
1435 | return 0; | |
1436 | ||
9e1e64ec | 1437 | if (! CLASS_TYPE_P (type)) |
be99da77 MS |
1438 | { |
1439 | if (or_else) | |
9e1e64ec | 1440 | error ("%qT is not a class type", type); |
be99da77 MS |
1441 | return 0; |
1442 | } | |
1443 | return 1; | |
1444 | } | |
1445 | ||
8d08fdba | 1446 | tree |
362efdc1 | 1447 | get_type_value (tree name) |
8d08fdba | 1448 | { |
8d08fdba MS |
1449 | if (name == error_mark_node) |
1450 | return NULL_TREE; | |
1451 | ||
1452 | if (IDENTIFIER_HAS_TYPE_VALUE (name)) | |
1453 | return IDENTIFIER_TYPE_VALUE (name); | |
8d08fdba MS |
1454 | else |
1455 | return NULL_TREE; | |
1456 | } | |
051e6fd7 | 1457 | |
a5ac359a MM |
1458 | /* Build a reference to a member of an aggregate. This is not a C++ |
1459 | `&', but really something which can have its address taken, and | |
1460 | then act as a pointer to member, for example TYPE :: FIELD can have | |
1461 | its address taken by saying & TYPE :: FIELD. ADDRESS_P is true if | |
1462 | this expression is the operand of "&". | |
8d08fdba MS |
1463 | |
1464 | @@ Prints out lousy diagnostics for operator <typename> | |
1465 | @@ fields. | |
1466 | ||
51c184be | 1467 | @@ This function should be rewritten and placed in search.c. */ |
e92cc029 | 1468 | |
8d08fdba | 1469 | tree |
d4f0f205 | 1470 | build_offset_ref (tree type, tree member, bool address_p) |
8d08fdba | 1471 | { |
8d245821 | 1472 | tree decl; |
fc378698 | 1473 | tree basebinfo = NULL_TREE; |
8d08fdba | 1474 | |
5f311aec | 1475 | /* class templates can come in as TEMPLATE_DECLs here. */ |
d4f0f205 MM |
1476 | if (TREE_CODE (member) == TEMPLATE_DECL) |
1477 | return member; | |
93cdc044 | 1478 | |
d4f0f205 | 1479 | if (dependent_type_p (type) || type_dependent_expression_p (member)) |
3db45ab5 | 1480 | return build_qualified_name (NULL_TREE, type, member, |
02ed62dd | 1481 | /*template_p=*/false); |
5566b478 | 1482 | |
d4f0f205 | 1483 | gcc_assert (TYPE_P (type)); |
9e1e64ec | 1484 | if (! is_class_type (type, 1)) |
c833d2be NS |
1485 | return error_mark_node; |
1486 | ||
d4f0f205 MM |
1487 | gcc_assert (DECL_P (member) || BASELINK_P (member)); |
1488 | /* Callers should call mark_used before this point. */ | |
1489 | gcc_assert (!DECL_P (member) || TREE_USED (member)); | |
be99da77 | 1490 | |
d0f062fb | 1491 | if (!COMPLETE_TYPE_P (complete_type (type)) |
61a127b3 | 1492 | && !TYPE_BEING_DEFINED (type)) |
8d08fdba | 1493 | { |
d4f0f205 | 1494 | error ("incomplete type %qT does not have member %qD", type, member); |
a5ac359a MM |
1495 | return error_mark_node; |
1496 | } | |
1497 | ||
d4f0f205 | 1498 | /* Entities other than non-static members need no further |
3db45ab5 | 1499 | processing. */ |
a5ac359a | 1500 | if (TREE_CODE (member) == TYPE_DECL) |
d4f0f205 | 1501 | return member; |
a5ac359a | 1502 | if (TREE_CODE (member) == VAR_DECL || TREE_CODE (member) == CONST_DECL) |
d4f0f205 | 1503 | return convert_from_reference (member); |
a5ac359a MM |
1504 | |
1505 | if (TREE_CODE (member) == FIELD_DECL && DECL_C_BIT_FIELD (member)) | |
1506 | { | |
15a7ee29 | 1507 | error ("invalid pointer to bit-field %qD", member); |
a5ac359a MM |
1508 | return error_mark_node; |
1509 | } | |
1510 | ||
d4f0f205 MM |
1511 | /* Set up BASEBINFO for member lookup. */ |
1512 | decl = maybe_dummy_object (type, &basebinfo); | |
1513 | ||
aa52c1ff | 1514 | /* A lot of this logic is now handled in lookup_member. */ |
a5ac359a | 1515 | if (BASELINK_P (member)) |
8d08fdba | 1516 | { |
8d08fdba | 1517 | /* Go from the TREE_BASELINK to the member function info. */ |
7304fcb4 | 1518 | tree t = BASELINK_FUNCTIONS (member); |
8d08fdba | 1519 | |
50ad9642 | 1520 | if (TREE_CODE (t) != TEMPLATE_ID_EXPR && !really_overloaded_fn (t)) |
8d08fdba | 1521 | { |
f4f206f4 | 1522 | /* Get rid of a potential OVERLOAD around it. */ |
2c73f9f5 ML |
1523 | t = OVL_CURRENT (t); |
1524 | ||
b54f5338 KL |
1525 | /* Unique functions are handled easily. */ |
1526 | ||
1527 | /* For non-static member of base class, we need a special rule | |
1528 | for access checking [class.protected]: | |
1529 | ||
1530 | If the access is to form a pointer to member, the | |
1531 | nested-name-specifier shall name the derived class | |
1532 | (or any class derived from that class). */ | |
1533 | if (address_p && DECL_P (t) | |
1534 | && DECL_NONSTATIC_MEMBER_P (t)) | |
02022f3a | 1535 | perform_or_defer_access_check (TYPE_BINFO (type), t, t); |
b54f5338 | 1536 | else |
02022f3a | 1537 | perform_or_defer_access_check (basebinfo, t, t); |
b54f5338 | 1538 | |
848b92e1 JM |
1539 | if (DECL_STATIC_FUNCTION_P (t)) |
1540 | return t; | |
a5ac359a MM |
1541 | member = t; |
1542 | } | |
1543 | else | |
7304fcb4 | 1544 | TREE_TYPE (member) = unknown_type_node; |
8d08fdba | 1545 | } |
b54f5338 KL |
1546 | else if (address_p && TREE_CODE (member) == FIELD_DECL) |
1547 | /* We need additional test besides the one in | |
1548 | check_accessibility_of_qualified_id in case it is | |
1549 | a pointer to non-static member. */ | |
02022f3a | 1550 | perform_or_defer_access_check (TYPE_BINFO (type), member, member); |
8d08fdba | 1551 | |
a5ac359a | 1552 | if (!address_p) |
8d08fdba | 1553 | { |
a5ac359a MM |
1554 | /* If MEMBER is non-static, then the program has fallen afoul of |
1555 | [expr.prim]: | |
8d08fdba | 1556 | |
a5ac359a MM |
1557 | An id-expression that denotes a nonstatic data member or |
1558 | nonstatic member function of a class can only be used: | |
8d08fdba | 1559 | |
a5ac359a MM |
1560 | -- as part of a class member access (_expr.ref_) in which the |
1561 | object-expression refers to the member's class or a class | |
1562 | derived from that class, or | |
b7484fbe | 1563 | |
a5ac359a MM |
1564 | -- to form a pointer to member (_expr.unary.op_), or |
1565 | ||
1566 | -- in the body of a nonstatic member function of that class or | |
1567 | of a class derived from that class (_class.mfct.nonstatic_), or | |
1568 | ||
1569 | -- in a mem-initializer for a constructor for that class or for | |
1570 | a class derived from that class (_class.base.init_). */ | |
1571 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (member)) | |
1572 | { | |
39a13be5 | 1573 | /* Build a representation of the qualified name suitable |
e9525111 MM |
1574 | for use as the operand to "&" -- even though the "&" is |
1575 | not actually present. */ | |
f293ce4b | 1576 | member = build2 (OFFSET_REF, TREE_TYPE (member), decl, member); |
a5ac359a MM |
1577 | /* In Microsoft mode, treat a non-static member function as if |
1578 | it were a pointer-to-member. */ | |
1579 | if (flag_ms_extensions) | |
1580 | { | |
a5ac359a | 1581 | PTRMEM_OK_P (member) = 1; |
5ade1ed2 DG |
1582 | return cp_build_unary_op (ADDR_EXPR, member, 0, |
1583 | tf_warning_or_error); | |
a5ac359a | 1584 | } |
c8094d83 | 1585 | error ("invalid use of non-static member function %qD", |
e9525111 | 1586 | TREE_OPERAND (member, 1)); |
07471dfb | 1587 | return error_mark_node; |
a5ac359a MM |
1588 | } |
1589 | else if (TREE_CODE (member) == FIELD_DECL) | |
1590 | { | |
15a7ee29 | 1591 | error ("invalid use of non-static data member %qD", member); |
a5ac359a MM |
1592 | return error_mark_node; |
1593 | } | |
1594 | return member; | |
1595 | } | |
8d08fdba | 1596 | |
f293ce4b | 1597 | member = build2 (OFFSET_REF, TREE_TYPE (member), decl, member); |
8d245821 MM |
1598 | PTRMEM_OK_P (member) = 1; |
1599 | return member; | |
8d08fdba MS |
1600 | } |
1601 | ||
393e756d MM |
1602 | /* If DECL is a scalar enumeration constant or variable with a |
1603 | constant initializer, return the initializer (or, its initializers, | |
1604 | recursively); otherwise, return DECL. If INTEGRAL_P, the | |
1605 | initializer is only returned if DECL is an integral | |
1606 | constant-expression. */ | |
8d08fdba | 1607 | |
393e756d MM |
1608 | static tree |
1609 | constant_value_1 (tree decl, bool integral_p) | |
8d08fdba | 1610 | { |
f513e31f | 1611 | while (TREE_CODE (decl) == CONST_DECL |
3db45ab5 | 1612 | || (integral_p |
393e756d MM |
1613 | ? DECL_INTEGRAL_CONSTANT_VAR_P (decl) |
1614 | : (TREE_CODE (decl) == VAR_DECL | |
1615 | && CP_TYPE_CONST_NON_VOLATILE_P (TREE_TYPE (decl))))) | |
b794e321 MM |
1616 | { |
1617 | tree init; | |
2d22db1f MM |
1618 | /* Static data members in template classes may have |
1619 | non-dependent initializers. References to such non-static | |
d174af6c | 1620 | data members are not value-dependent, so we must retrieve the |
2d22db1f MM |
1621 | initializer here. The DECL_INITIAL will have the right type, |
1622 | but will not have been folded because that would prevent us | |
1623 | from performing all appropriate semantic checks at | |
1624 | instantiation time. */ | |
1625 | if (DECL_CLASS_SCOPE_P (decl) | |
1626 | && CLASSTYPE_TEMPLATE_INFO (DECL_CONTEXT (decl)) | |
3db45ab5 | 1627 | && uses_template_parms (CLASSTYPE_TI_ARGS |
2d22db1f | 1628 | (DECL_CONTEXT (decl)))) |
d174af6c MM |
1629 | { |
1630 | ++processing_template_decl; | |
1631 | init = fold_non_dependent_expr (DECL_INITIAL (decl)); | |
1632 | --processing_template_decl; | |
1633 | } | |
2d22db1f MM |
1634 | else |
1635 | { | |
1636 | /* If DECL is a static data member in a template | |
1637 | specialization, we must instantiate it here. The | |
1638 | initializer for the static data member is not processed | |
1639 | until needed; we need it now. */ | |
1640 | mark_used (decl); | |
1641 | init = DECL_INITIAL (decl); | |
1642 | } | |
d174af6c | 1643 | if (init == error_mark_node) |
1ac8104c | 1644 | return decl; |
73ce7fcb JJ |
1645 | /* Initializers in templates are generally expanded during |
1646 | instantiation, so before that for const int i(2) | |
1647 | INIT is a TREE_LIST with the actual initializer as | |
1648 | TREE_VALUE. */ | |
1649 | if (processing_template_decl | |
1650 | && init | |
1651 | && TREE_CODE (init) == TREE_LIST | |
1652 | && TREE_CHAIN (init) == NULL_TREE) | |
1653 | init = TREE_VALUE (init); | |
d174af6c | 1654 | if (!init |
b794e321 | 1655 | || !TREE_TYPE (init) |
393e756d MM |
1656 | || (integral_p |
1657 | ? !INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (init)) | |
1658 | : (!TREE_CONSTANT (init) | |
1659 | /* Do not return an aggregate constant (of which | |
1660 | string literals are a special case), as we do not | |
dd36d4e1 | 1661 | want to make inadvertent copies of such entities, |
393e756d MM |
1662 | and we must be sure that their addresses are the |
1663 | same everywhere. */ | |
1664 | || TREE_CODE (init) == CONSTRUCTOR | |
1665 | || TREE_CODE (init) == STRING_CST))) | |
b794e321 | 1666 | break; |
57b37fe3 | 1667 | decl = unshare_expr (init); |
b794e321 | 1668 | } |
8a784e4a NS |
1669 | return decl; |
1670 | } | |
a1652802 | 1671 | |
393e756d MM |
1672 | /* If DECL is a CONST_DECL, or a constant VAR_DECL initialized by |
1673 | constant of integral or enumeration type, then return that value. | |
1674 | These are those variables permitted in constant expressions by | |
1675 | [5.19/1]. */ | |
a1652802 | 1676 | |
8a784e4a | 1677 | tree |
393e756d | 1678 | integral_constant_value (tree decl) |
8a784e4a | 1679 | { |
393e756d MM |
1680 | return constant_value_1 (decl, /*integral_p=*/true); |
1681 | } | |
c8094d83 | 1682 | |
393e756d | 1683 | /* A more relaxed version of integral_constant_value, used by the |
3b426391 | 1684 | common C/C++ code and by the C++ front end for optimization |
393e756d MM |
1685 | purposes. */ |
1686 | ||
1687 | tree | |
1688 | decl_constant_value (tree decl) | |
1689 | { | |
3db45ab5 | 1690 | return constant_value_1 (decl, |
393e756d | 1691 | /*integral_p=*/processing_template_decl); |
8d08fdba MS |
1692 | } |
1693 | \f | |
8d08fdba MS |
1694 | /* Common subroutines of build_new and build_vec_delete. */ |
1695 | ||
c787dd82 | 1696 | /* Call the global __builtin_delete to delete ADDR. */ |
8d08fdba | 1697 | |
bd6dd845 | 1698 | static tree |
362efdc1 | 1699 | build_builtin_delete_call (tree addr) |
8d08fdba | 1700 | { |
a6ecf8b6 | 1701 | mark_used (global_delete_fndecl); |
94a0dd7b | 1702 | return build_call_n (global_delete_fndecl, 1, addr); |
8d08fdba MS |
1703 | } |
1704 | \f | |
63c9a190 MM |
1705 | /* Build and return a NEW_EXPR. If NELTS is non-NULL, TYPE[NELTS] is |
1706 | the type of the object being allocated; otherwise, it's just TYPE. | |
1707 | INIT is the initializer, if any. USE_GLOBAL_NEW is true if the | |
1708 | user explicitly wrote "::operator new". PLACEMENT, if non-NULL, is | |
1709 | the TREE_LIST of arguments to be provided as arguments to a | |
1710 | placement new operator. This routine performs no semantic checks; | |
1711 | it just creates and returns a NEW_EXPR. */ | |
a0d5fba7 | 1712 | |
63c9a190 MM |
1713 | static tree |
1714 | build_raw_new_expr (tree placement, tree type, tree nelts, tree init, | |
1715 | int use_global_new) | |
743f140d | 1716 | { |
63c9a190 | 1717 | tree new_expr; |
3db45ab5 MS |
1718 | |
1719 | new_expr = build4 (NEW_EXPR, build_pointer_type (type), placement, type, | |
1720 | nelts, init); | |
63c9a190 MM |
1721 | NEW_EXPR_USE_GLOBAL (new_expr) = use_global_new; |
1722 | TREE_SIDE_EFFECTS (new_expr) = 1; | |
1723 | ||
1724 | return new_expr; | |
743f140d PB |
1725 | } |
1726 | ||
058dcc25 ILT |
1727 | /* Make sure that there are no aliasing issues with T, a placement new |
1728 | expression applied to PLACEMENT, by recording the change in dynamic | |
1729 | type. If placement new is inlined, as it is with libstdc++, and if | |
1730 | the type of the placement new differs from the type of the | |
1731 | placement location itself, then alias analysis may think it is OK | |
1732 | to interchange writes to the location from before the placement new | |
1733 | and from after the placement new. We have to prevent type-based | |
1734 | alias analysis from applying. PLACEMENT may be NULL, which means | |
1735 | that we couldn't capture it in a temporary variable, in which case | |
1736 | we use a memory clobber. */ | |
1737 | ||
1738 | static tree | |
1739 | avoid_placement_new_aliasing (tree t, tree placement) | |
1740 | { | |
1741 | tree type_change; | |
1742 | ||
1743 | if (processing_template_decl) | |
1744 | return t; | |
1745 | ||
1746 | /* If we are not using type based aliasing, we don't have to do | |
1747 | anything. */ | |
1748 | if (!flag_strict_aliasing) | |
1749 | return t; | |
1750 | ||
1751 | /* If we have a pointer and a location, record the change in dynamic | |
1752 | type. Otherwise we need a general memory clobber. */ | |
1753 | if (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE | |
1754 | && placement != NULL_TREE | |
1755 | && TREE_CODE (TREE_TYPE (placement)) == POINTER_TYPE) | |
1756 | type_change = build_stmt (CHANGE_DYNAMIC_TYPE_EXPR, | |
1757 | TREE_TYPE (t), | |
1758 | placement); | |
1759 | else | |
1760 | { | |
1761 | /* Build a memory clobber. */ | |
1762 | type_change = build_stmt (ASM_EXPR, | |
1763 | build_string (0, ""), | |
1764 | NULL_TREE, | |
1765 | NULL_TREE, | |
1766 | tree_cons (NULL_TREE, | |
1767 | build_string (6, "memory"), | |
1768 | NULL_TREE)); | |
1769 | ||
1770 | ASM_VOLATILE_P (type_change) = 1; | |
1771 | } | |
1772 | ||
1773 | return build2 (COMPOUND_EXPR, TREE_TYPE (t), type_change, t); | |
1774 | } | |
1775 | ||
63c9a190 MM |
1776 | /* Generate code for a new-expression, including calling the "operator |
1777 | new" function, initializing the object, and, if an exception occurs | |
1778 | during construction, cleaning up. The arguments are as for | |
1779 | build_raw_new_expr. */ | |
a0d5fba7 | 1780 | |
834c6dff | 1781 | static tree |
63c9a190 | 1782 | build_new_1 (tree placement, tree type, tree nelts, tree init, |
5ade1ed2 | 1783 | bool globally_qualified_p, tsubst_flags_t complain) |
a0d5fba7 | 1784 | { |
d746e87d MM |
1785 | tree size, rval; |
1786 | /* True iff this is a call to "operator new[]" instead of just | |
c8094d83 | 1787 | "operator new". */ |
d746e87d | 1788 | bool array_p = false; |
9207099b JM |
1789 | /* If ARRAY_P is true, the element type of the array. This is never |
1790 | an ARRAY_TYPE; for something like "new int[3][4]", the | |
d746e87d | 1791 | ELT_TYPE is "int". If ARRAY_P is false, this is the same type as |
9207099b | 1792 | TYPE. */ |
d746e87d | 1793 | tree elt_type; |
f4f4610e MM |
1794 | /* The type of the new-expression. (This type is always a pointer |
1795 | type.) */ | |
1796 | tree pointer_type; | |
a48cccea | 1797 | tree outer_nelts = NULL_TREE; |
f4f4610e MM |
1798 | tree alloc_call, alloc_expr; |
1799 | /* The address returned by the call to "operator new". This node is | |
1800 | a VAR_DECL and is therefore reusable. */ | |
1801 | tree alloc_node; | |
46ff5047 | 1802 | tree alloc_fn; |
8b5e2ce4 | 1803 | tree cookie_expr, init_expr; |
089d6ea7 | 1804 | int nothrow, check_new; |
743f140d | 1805 | int use_java_new = 0; |
834c6dff MM |
1806 | /* If non-NULL, the number of extra bytes to allocate at the |
1807 | beginning of the storage allocated for an array-new expression in | |
1808 | order to store the number of elements. */ | |
1809 | tree cookie_size = NULL_TREE; | |
a9de800a | 1810 | tree placement_expr = NULL_TREE; |
3f41ffd8 MM |
1811 | /* True if the function we are calling is a placement allocation |
1812 | function. */ | |
1813 | bool placement_allocation_fn_p; | |
4f649415 | 1814 | tree args = NULL_TREE; |
f4f4610e | 1815 | /* True if the storage must be initialized, either by a constructor |
34cd5ae7 | 1816 | or due to an explicit new-initializer. */ |
f4f4610e MM |
1817 | bool is_initialized; |
1818 | /* The address of the thing allocated, not including any cookie. In | |
1819 | particular, if an array cookie is in use, DATA_ADDR is the | |
1820 | address of the first array element. This node is a VAR_DECL, and | |
1821 | is therefore reusable. */ | |
1822 | tree data_addr; | |
6de9cd9a | 1823 | tree init_preeval_expr = NULL_TREE; |
a0d5fba7 | 1824 | |
058b15c1 | 1825 | if (nelts) |
a0d5fba7 | 1826 | { |
058b15c1 | 1827 | outer_nelts = nelts; |
d746e87d | 1828 | array_p = true; |
a0d5fba7 | 1829 | } |
9207099b | 1830 | else if (TREE_CODE (type) == ARRAY_TYPE) |
d746e87d | 1831 | { |
9207099b JM |
1832 | array_p = true; |
1833 | nelts = array_type_nelts_top (type); | |
1834 | outer_nelts = nelts; | |
1835 | type = TREE_TYPE (type); | |
d746e87d | 1836 | } |
834c6dff | 1837 | |
8d08fdba MS |
1838 | /* If our base type is an array, then make sure we know how many elements |
1839 | it has. */ | |
d746e87d MM |
1840 | for (elt_type = type; |
1841 | TREE_CODE (elt_type) == ARRAY_TYPE; | |
1842 | elt_type = TREE_TYPE (elt_type)) | |
ba47d38d AH |
1843 | nelts = cp_build_binary_op (input_location, |
1844 | MULT_EXPR, nelts, | |
5ade1ed2 DG |
1845 | array_type_nelts_top (elt_type), |
1846 | complain); | |
5566b478 | 1847 | |
d746e87d | 1848 | if (TREE_CODE (elt_type) == VOID_TYPE) |
e1cd6e56 | 1849 | { |
5ade1ed2 DG |
1850 | if (complain & tf_error) |
1851 | error ("invalid type %<void%> for new"); | |
e1cd6e56 MS |
1852 | return error_mark_node; |
1853 | } | |
1854 | ||
d746e87d | 1855 | if (abstract_virtuals_error (NULL_TREE, elt_type)) |
a7a64a77 | 1856 | return error_mark_node; |
8926095f | 1857 | |
d746e87d | 1858 | is_initialized = (TYPE_NEEDS_CONSTRUCTING (elt_type) || init); |
b87d79e6 JM |
1859 | |
1860 | if (CP_TYPE_CONST_P (elt_type) && !init | |
1861 | && !type_has_user_provided_default_constructor (elt_type)) | |
f4f4610e | 1862 | { |
5ade1ed2 DG |
1863 | if (complain & tf_error) |
1864 | error ("uninitialized const in %<new%> of %q#T", elt_type); | |
f4f4610e MM |
1865 | return error_mark_node; |
1866 | } | |
1867 | ||
d746e87d MM |
1868 | size = size_in_bytes (elt_type); |
1869 | if (array_p) | |
9207099b | 1870 | size = size_binop (MULT_EXPR, size, convert (sizetype, nelts)); |
a28e3c7f | 1871 | |
63c9a190 MM |
1872 | alloc_fn = NULL_TREE; |
1873 | ||
e92cc029 | 1874 | /* Allocate the object. */ |
d746e87d | 1875 | if (! placement && TYPE_FOR_JAVA (elt_type)) |
743f140d | 1876 | { |
63c9a190 | 1877 | tree class_addr; |
d746e87d | 1878 | tree class_decl = build_java_class_ref (elt_type); |
8b60264b | 1879 | static const char alloc_name[] = "_Jv_AllocObject"; |
6de9cd9a | 1880 | |
a3d536f1 VR |
1881 | if (class_decl == error_mark_node) |
1882 | return error_mark_node; | |
1883 | ||
743f140d | 1884 | use_java_new = 1; |
c8094d83 | 1885 | if (!get_global_value_if_present (get_identifier (alloc_name), |
63c9a190 | 1886 | &alloc_fn)) |
b1e5b86c | 1887 | { |
5ade1ed2 DG |
1888 | if (complain & tf_error) |
1889 | error ("call to Java constructor with %qs undefined", alloc_name); | |
6961a592 GB |
1890 | return error_mark_node; |
1891 | } | |
63c9a190 | 1892 | else if (really_overloaded_fn (alloc_fn)) |
b1e5b86c | 1893 | { |
5ade1ed2 DG |
1894 | if (complain & tf_error) |
1895 | error ("%qD should never be overloaded", alloc_fn); | |
6961a592 GB |
1896 | return error_mark_node; |
1897 | } | |
63c9a190 | 1898 | alloc_fn = OVL_CURRENT (alloc_fn); |
743f140d | 1899 | class_addr = build1 (ADDR_EXPR, jclass_node, class_decl); |
5ade1ed2 | 1900 | alloc_call = (cp_build_function_call |
63c9a190 | 1901 | (alloc_fn, |
5ade1ed2 DG |
1902 | build_tree_list (NULL_TREE, class_addr), |
1903 | complain)); | |
743f140d | 1904 | } |
9e1e64ec | 1905 | else if (TYPE_FOR_JAVA (elt_type) && MAYBE_CLASS_TYPE_P (elt_type)) |
360f866c JJ |
1906 | { |
1907 | error ("Java class %q#T object allocated using placement new", elt_type); | |
1908 | return error_mark_node; | |
1909 | } | |
8d08fdba MS |
1910 | else |
1911 | { | |
834c6dff | 1912 | tree fnname; |
9f880ef9 | 1913 | tree fns; |
834c6dff | 1914 | |
d746e87d | 1915 | fnname = ansi_opname (array_p ? VEC_NEW_EXPR : NEW_EXPR); |
834c6dff | 1916 | |
c8094d83 | 1917 | if (!globally_qualified_p |
d746e87d MM |
1918 | && CLASS_TYPE_P (elt_type) |
1919 | && (array_p | |
1920 | ? TYPE_HAS_ARRAY_NEW_OPERATOR (elt_type) | |
1921 | : TYPE_HAS_NEW_OPERATOR (elt_type))) | |
089d6ea7 MM |
1922 | { |
1923 | /* Use a class-specific operator new. */ | |
1924 | /* If a cookie is required, add some extra space. */ | |
d746e87d | 1925 | if (array_p && TYPE_VEC_NEW_USES_COOKIE (elt_type)) |
089d6ea7 | 1926 | { |
d746e87d | 1927 | cookie_size = targetm.cxx.get_cookie_size (elt_type); |
089d6ea7 MM |
1928 | size = size_binop (PLUS_EXPR, size, cookie_size); |
1929 | } | |
1930 | /* Create the argument list. */ | |
1931 | args = tree_cons (NULL_TREE, size, placement); | |
9f880ef9 | 1932 | /* Do name-lookup to find the appropriate operator. */ |
d746e87d | 1933 | fns = lookup_fnfields (elt_type, fnname, /*protect=*/2); |
a85cb0d7 VR |
1934 | if (fns == NULL_TREE) |
1935 | { | |
5ade1ed2 DG |
1936 | if (complain & tf_error) |
1937 | error ("no suitable %qD found in class %qT", fnname, elt_type); | |
a85cb0d7 VR |
1938 | return error_mark_node; |
1939 | } | |
9f880ef9 MM |
1940 | if (TREE_CODE (fns) == TREE_LIST) |
1941 | { | |
5ade1ed2 DG |
1942 | if (complain & tf_error) |
1943 | { | |
1944 | error ("request for member %qD is ambiguous", fnname); | |
1945 | print_candidates (fns); | |
1946 | } | |
9f880ef9 MM |
1947 | return error_mark_node; |
1948 | } | |
d746e87d | 1949 | alloc_call = build_new_method_call (build_dummy_object (elt_type), |
9f880ef9 MM |
1950 | fns, args, |
1951 | /*conversion_path=*/NULL_TREE, | |
63c9a190 | 1952 | LOOKUP_NORMAL, |
5ade1ed2 DG |
1953 | &alloc_fn, |
1954 | complain); | |
089d6ea7 | 1955 | } |
834c6dff | 1956 | else |
089d6ea7 MM |
1957 | { |
1958 | /* Use a global operator new. */ | |
125e6594 | 1959 | /* See if a cookie might be required. */ |
d746e87d MM |
1960 | if (array_p && TYPE_VEC_NEW_USES_COOKIE (elt_type)) |
1961 | cookie_size = targetm.cxx.get_cookie_size (elt_type); | |
125e6594 MM |
1962 | else |
1963 | cookie_size = NULL_TREE; | |
1964 | ||
c8094d83 | 1965 | alloc_call = build_operator_new_call (fnname, placement, |
63c9a190 MM |
1966 | &size, &cookie_size, |
1967 | &alloc_fn); | |
089d6ea7 | 1968 | } |
8d08fdba MS |
1969 | } |
1970 | ||
96790071 | 1971 | if (alloc_call == error_mark_node) |
2bb5d995 JM |
1972 | return error_mark_node; |
1973 | ||
63c9a190 MM |
1974 | gcc_assert (alloc_fn != NULL_TREE); |
1975 | ||
a9de800a JJ |
1976 | /* If PLACEMENT is a simple pointer type and is not passed by reference, |
1977 | then copy it into PLACEMENT_EXPR. */ | |
1978 | if (!processing_template_decl | |
1979 | && placement != NULL_TREE | |
1980 | && TREE_CHAIN (placement) == NULL_TREE | |
1981 | && TREE_CODE (TREE_TYPE (TREE_VALUE (placement))) == POINTER_TYPE | |
1982 | && TREE_CODE (alloc_call) == CALL_EXPR | |
1983 | && call_expr_nargs (alloc_call) == 2 | |
1984 | && TREE_CODE (TREE_TYPE (CALL_EXPR_ARG (alloc_call, 0))) == INTEGER_TYPE | |
1985 | && TREE_CODE (TREE_TYPE (CALL_EXPR_ARG (alloc_call, 1))) == POINTER_TYPE) | |
1986 | { | |
1987 | tree placement_arg = CALL_EXPR_ARG (alloc_call, 1); | |
1988 | ||
1989 | if (INTEGRAL_TYPE_P (TREE_TYPE (TREE_TYPE (placement_arg))) | |
1990 | || VOID_TYPE_P (TREE_TYPE (TREE_TYPE (placement_arg)))) | |
1991 | { | |
1992 | placement_expr = get_target_expr (TREE_VALUE (placement)); | |
1993 | CALL_EXPR_ARG (alloc_call, 1) | |
1994 | = convert (TREE_TYPE (placement_arg), placement_expr); | |
1995 | } | |
1996 | } | |
1997 | ||
a6111661 JM |
1998 | /* In the simple case, we can stop now. */ |
1999 | pointer_type = build_pointer_type (type); | |
2000 | if (!cookie_size && !is_initialized) | |
058dcc25 ILT |
2001 | { |
2002 | rval = build_nop (pointer_type, alloc_call); | |
2003 | if (placement != NULL) | |
412bbe81 | 2004 | rval = avoid_placement_new_aliasing (rval, placement_expr); |
058dcc25 ILT |
2005 | return rval; |
2006 | } | |
a6111661 | 2007 | |
10ee5386 JM |
2008 | /* Store the result of the allocation call in a variable so that we can |
2009 | use it more than once. */ | |
2010 | alloc_expr = get_target_expr (alloc_call); | |
a6111661 JM |
2011 | alloc_node = TARGET_EXPR_SLOT (alloc_expr); |
2012 | ||
2013 | /* Strip any COMPOUND_EXPRs from ALLOC_CALL. */ | |
c8094d83 | 2014 | while (TREE_CODE (alloc_call) == COMPOUND_EXPR) |
a6111661 | 2015 | alloc_call = TREE_OPERAND (alloc_call, 1); |
089d6ea7 | 2016 | |
3f41ffd8 MM |
2017 | /* Now, check to see if this function is actually a placement |
2018 | allocation function. This can happen even when PLACEMENT is NULL | |
2019 | because we might have something like: | |
2020 | ||
2021 | struct S { void* operator new (size_t, int i = 0); }; | |
2022 | ||
2023 | A call to `new S' will get this allocation function, even though | |
2024 | there is no explicit placement argument. If there is more than | |
2025 | one argument, or there are variable arguments, then this is a | |
2026 | placement allocation function. */ | |
c8094d83 MS |
2027 | placement_allocation_fn_p |
2028 | = (type_num_arguments (TREE_TYPE (alloc_fn)) > 1 | |
46ff5047 | 2029 | || varargs_function_p (alloc_fn)); |
96790071 | 2030 | |
a6111661 JM |
2031 | /* Preevaluate the placement args so that we don't reevaluate them for a |
2032 | placement delete. */ | |
2033 | if (placement_allocation_fn_p) | |
2034 | { | |
6de9cd9a DN |
2035 | tree inits; |
2036 | stabilize_call (alloc_call, &inits); | |
a6111661 | 2037 | if (inits) |
f293ce4b RS |
2038 | alloc_expr = build2 (COMPOUND_EXPR, TREE_TYPE (alloc_expr), inits, |
2039 | alloc_expr); | |
a6111661 JM |
2040 | } |
2041 | ||
047f64a3 JM |
2042 | /* unless an allocation function is declared with an empty excep- |
2043 | tion-specification (_except.spec_), throw(), it indicates failure to | |
2044 | allocate storage by throwing a bad_alloc exception (clause _except_, | |
2045 | _lib.bad.alloc_); it returns a non-null pointer otherwise If the allo- | |
2046 | cation function is declared with an empty exception-specification, | |
2047 | throw(), it returns null to indicate failure to allocate storage and a | |
2048 | non-null pointer otherwise. | |
2049 | ||
2050 | So check for a null exception spec on the op new we just called. */ | |
2051 | ||
46ff5047 | 2052 | nothrow = TYPE_NOTHROW_P (TREE_TYPE (alloc_fn)); |
743f140d | 2053 | check_new = (flag_check_new || nothrow) && ! use_java_new; |
047f64a3 | 2054 | |
089d6ea7 | 2055 | if (cookie_size) |
8d08fdba | 2056 | { |
96790071 | 2057 | tree cookie; |
46e995e0 | 2058 | tree cookie_ptr; |
b5119fa1 | 2059 | tree size_ptr_type; |
f4f4610e MM |
2060 | |
2061 | /* Adjust so we're pointing to the start of the object. */ | |
10ee5386 JM |
2062 | data_addr = build2 (POINTER_PLUS_EXPR, TREE_TYPE (alloc_node), |
2063 | alloc_node, cookie_size); | |
96790071 | 2064 | |
834c6dff | 2065 | /* Store the number of bytes allocated so that we can know how |
3461fba7 NS |
2066 | many elements to destroy later. We use the last sizeof |
2067 | (size_t) bytes to store the number of elements. */ | |
10ee5386 JM |
2068 | cookie_ptr = size_binop (MINUS_EXPR, cookie_size, size_in_bytes (sizetype)); |
2069 | cookie_ptr = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (alloc_node), | |
2070 | alloc_node, cookie_ptr); | |
b5119fa1 | 2071 | size_ptr_type = build_pointer_type (sizetype); |
10ee5386 | 2072 | cookie_ptr = fold_convert (size_ptr_type, cookie_ptr); |
5ade1ed2 | 2073 | cookie = cp_build_indirect_ref (cookie_ptr, NULL, complain); |
1f84ec23 | 2074 | |
f293ce4b | 2075 | cookie_expr = build2 (MODIFY_EXPR, sizetype, cookie, nelts); |
46e995e0 PB |
2076 | |
2077 | if (targetm.cxx.cookie_has_size ()) | |
2078 | { | |
2079 | /* Also store the element size. */ | |
b2ec1738 DD |
2080 | cookie_ptr = build2 (POINTER_PLUS_EXPR, size_ptr_type, cookie_ptr, |
2081 | fold_build1 (NEGATE_EXPR, sizetype, | |
2082 | size_in_bytes (sizetype))); | |
2083 | ||
5ade1ed2 | 2084 | cookie = cp_build_indirect_ref (cookie_ptr, NULL, complain); |
f293ce4b | 2085 | cookie = build2 (MODIFY_EXPR, sizetype, cookie, |
10ee5386 | 2086 | size_in_bytes (elt_type)); |
f293ce4b RS |
2087 | cookie_expr = build2 (COMPOUND_EXPR, TREE_TYPE (cookie_expr), |
2088 | cookie, cookie_expr); | |
46e995e0 | 2089 | } |
8d08fdba | 2090 | } |
96790071 | 2091 | else |
8b5e2ce4 JM |
2092 | { |
2093 | cookie_expr = NULL_TREE; | |
2094 | data_addr = alloc_node; | |
2095 | } | |
8d08fdba | 2096 | |
10ee5386 | 2097 | /* Now use a pointer to the type we've actually allocated. */ |
9207099b JM |
2098 | data_addr = fold_convert (pointer_type, data_addr); |
2099 | /* Any further uses of alloc_node will want this type, too. */ | |
2100 | alloc_node = fold_convert (pointer_type, alloc_node); | |
10ee5386 | 2101 | |
6de9cd9a DN |
2102 | /* Now initialize the allocated object. Note that we preevaluate the |
2103 | initialization expression, apart from the actual constructor call or | |
2104 | assignment--we do this because we want to delay the allocation as long | |
2105 | as possible in order to minimize the size of the exception region for | |
2106 | placement delete. */ | |
f4f4610e | 2107 | if (is_initialized) |
8d08fdba | 2108 | { |
6de9cd9a | 2109 | bool stable; |
844ae01d | 2110 | bool explicit_value_init_p = false; |
6de9cd9a | 2111 | |
844ae01d | 2112 | if (init == void_zero_node) |
6de9cd9a | 2113 | { |
844ae01d JM |
2114 | init = NULL_TREE; |
2115 | explicit_value_init_p = true; | |
2116 | } | |
b84f4651 | 2117 | |
844ae01d JM |
2118 | if (array_p) |
2119 | { | |
2120 | if (init) | |
5ade1ed2 DG |
2121 | { |
2122 | if (complain & tf_error) | |
cbe5f3b3 | 2123 | permerror (input_location, "ISO C++ forbids initialization in array new"); |
5ade1ed2 DG |
2124 | else |
2125 | return error_mark_node; | |
2126 | } | |
6de9cd9a | 2127 | init_expr |
9207099b | 2128 | = build_vec_init (data_addr, |
ba47d38d AH |
2129 | cp_build_binary_op (input_location, |
2130 | MINUS_EXPR, outer_nelts, | |
5ade1ed2 DG |
2131 | integer_one_node, |
2132 | complain), | |
3db45ab5 | 2133 | init, |
844ae01d | 2134 | explicit_value_init_p, |
5ade1ed2 DG |
2135 | /*from_array=*/0, |
2136 | complain); | |
6de9cd9a DN |
2137 | |
2138 | /* An array initialization is stable because the initialization | |
2139 | of each element is a full-expression, so the temporaries don't | |
2140 | leak out. */ | |
2141 | stable = true; | |
2142 | } | |
f30efcb7 | 2143 | else |
8d08fdba | 2144 | { |
9207099b JM |
2145 | init_expr = cp_build_indirect_ref (data_addr, NULL, complain); |
2146 | ||
844ae01d | 2147 | if (TYPE_NEEDS_CONSTRUCTING (type) && !explicit_value_init_p) |
b84f4651 MM |
2148 | { |
2149 | init_expr = build_special_member_call (init_expr, | |
2150 | complete_ctor_identifier, | |
2151 | init, elt_type, | |
5ade1ed2 DG |
2152 | LOOKUP_NORMAL, |
2153 | complain); | |
844ae01d JM |
2154 | } |
2155 | else if (explicit_value_init_p) | |
2156 | { | |
2157 | /* Something like `new int()'. */ | |
9207099b JM |
2158 | init_expr = build2 (INIT_EXPR, type, |
2159 | init_expr, build_value_init (type)); | |
b84f4651 | 2160 | } |
8dc2b103 | 2161 | else |
b84f4651 MM |
2162 | { |
2163 | /* We are processing something like `new int (10)', which | |
2164 | means allocate an int, and initialize it with 10. */ | |
3db45ab5 | 2165 | |
b84f4651 | 2166 | if (TREE_CODE (init) == TREE_LIST) |
3db45ab5 | 2167 | init = build_x_compound_expr_from_list (init, |
b84f4651 MM |
2168 | "new initializer"); |
2169 | else | |
2170 | gcc_assert (TREE_CODE (init) != CONSTRUCTOR | |
2171 | || TREE_TYPE (init) != NULL_TREE); | |
3db45ab5 | 2172 | |
5ade1ed2 DG |
2173 | init_expr = cp_build_modify_expr (init_expr, INIT_EXPR, init, |
2174 | complain); | |
b84f4651 | 2175 | } |
844ae01d | 2176 | stable = stabilize_init (init_expr, &init_preeval_expr); |
96790071 JM |
2177 | } |
2178 | ||
2179 | if (init_expr == error_mark_node) | |
2180 | return error_mark_node; | |
1f109f0f | 2181 | |
20c39572 JM |
2182 | /* If any part of the object initialization terminates by throwing an |
2183 | exception and a suitable deallocation function can be found, the | |
2184 | deallocation function is called to free the memory in which the | |
2185 | object was being constructed, after which the exception continues | |
2186 | to propagate in the context of the new-expression. If no | |
2187 | unambiguous matching deallocation function can be found, | |
2188 | propagating the exception does not cause the object's memory to be | |
2189 | freed. */ | |
96790071 | 2190 | if (flag_exceptions && ! use_java_new) |
1f109f0f | 2191 | { |
d746e87d | 2192 | enum tree_code dcode = array_p ? VEC_DELETE_EXPR : DELETE_EXPR; |
96790071 | 2193 | tree cleanup; |
a7d87521 | 2194 | |
5355deec | 2195 | /* The Standard is unclear here, but the right thing to do |
f4f4610e MM |
2196 | is to use the same method for finding deallocation |
2197 | functions that we use for finding allocation functions. */ | |
10ee5386 JM |
2198 | cleanup = (build_op_delete_call |
2199 | (dcode, | |
9207099b | 2200 | alloc_node, |
10ee5386 JM |
2201 | size, |
2202 | globally_qualified_p, | |
2203 | placement_allocation_fn_p ? alloc_call : NULL_TREE, | |
2204 | alloc_fn)); | |
2bb14213 | 2205 | |
6de9cd9a DN |
2206 | if (!cleanup) |
2207 | /* We're done. */; | |
2208 | else if (stable) | |
2209 | /* This is much simpler if we were able to preevaluate all of | |
2210 | the arguments to the constructor call. */ | |
f293ce4b RS |
2211 | init_expr = build2 (TRY_CATCH_EXPR, void_type_node, |
2212 | init_expr, cleanup); | |
6de9cd9a DN |
2213 | else |
2214 | /* Ack! First we allocate the memory. Then we set our sentry | |
2215 | variable to true, and expand a cleanup that deletes the | |
2216 | memory if sentry is true. Then we run the constructor, and | |
2217 | finally clear the sentry. | |
2218 | ||
2219 | We need to do this because we allocate the space first, so | |
2220 | if there are any temporaries with cleanups in the | |
2221 | constructor args and we weren't able to preevaluate them, we | |
2222 | need this EH region to extend until end of full-expression | |
2223 | to preserve nesting. */ | |
da4768fe | 2224 | { |
96790071 | 2225 | tree end, sentry, begin; |
2face519 JM |
2226 | |
2227 | begin = get_target_expr (boolean_true_node); | |
659e5a7a | 2228 | CLEANUP_EH_ONLY (begin) = 1; |
2face519 | 2229 | |
659e5a7a JM |
2230 | sentry = TARGET_EXPR_SLOT (begin); |
2231 | ||
2232 | TARGET_EXPR_CLEANUP (begin) | |
f293ce4b RS |
2233 | = build3 (COND_EXPR, void_type_node, sentry, |
2234 | cleanup, void_zero_node); | |
2face519 | 2235 | |
f293ce4b RS |
2236 | end = build2 (MODIFY_EXPR, TREE_TYPE (sentry), |
2237 | sentry, boolean_false_node); | |
2face519 | 2238 | |
96790071 | 2239 | init_expr |
f293ce4b RS |
2240 | = build2 (COMPOUND_EXPR, void_type_node, begin, |
2241 | build2 (COMPOUND_EXPR, void_type_node, init_expr, | |
2242 | end)); | |
da4768fe | 2243 | } |
c8094d83 | 2244 | |
1f109f0f | 2245 | } |
f4f4610e | 2246 | } |
8b5e2ce4 JM |
2247 | else |
2248 | init_expr = NULL_TREE; | |
2249 | ||
2250 | /* Now build up the return value in reverse order. */ | |
96790071 | 2251 | |
8b5e2ce4 | 2252 | rval = data_addr; |
2face519 | 2253 | |
8b5e2ce4 | 2254 | if (init_expr) |
f293ce4b | 2255 | rval = build2 (COMPOUND_EXPR, TREE_TYPE (rval), init_expr, rval); |
8b5e2ce4 | 2256 | if (cookie_expr) |
f293ce4b | 2257 | rval = build2 (COMPOUND_EXPR, TREE_TYPE (rval), cookie_expr, rval); |
8b5e2ce4 | 2258 | |
10ee5386 | 2259 | if (rval == data_addr) |
8b5e2ce4 JM |
2260 | /* If we don't have an initializer or a cookie, strip the TARGET_EXPR |
2261 | and return the call (which doesn't need to be adjusted). */ | |
2262 | rval = TARGET_EXPR_INITIAL (alloc_expr); | |
2263 | else | |
d18c083e | 2264 | { |
8b5e2ce4 JM |
2265 | if (check_new) |
2266 | { | |
ba47d38d AH |
2267 | tree ifexp = cp_build_binary_op (input_location, |
2268 | NE_EXPR, alloc_node, | |
5ade1ed2 DG |
2269 | integer_zero_node, |
2270 | complain); | |
2271 | rval = build_conditional_expr (ifexp, rval, alloc_node, | |
2272 | complain); | |
8b5e2ce4 | 2273 | } |
d18c083e | 2274 | |
8b5e2ce4 JM |
2275 | /* Perform the allocation before anything else, so that ALLOC_NODE |
2276 | has been initialized before we start using it. */ | |
f293ce4b | 2277 | rval = build2 (COMPOUND_EXPR, TREE_TYPE (rval), alloc_expr, rval); |
8b5e2ce4 | 2278 | } |
51c184be | 2279 | |
6de9cd9a | 2280 | if (init_preeval_expr) |
f293ce4b | 2281 | rval = build2 (COMPOUND_EXPR, TREE_TYPE (rval), init_preeval_expr, rval); |
6de9cd9a | 2282 | |
d04a575f | 2283 | /* A new-expression is never an lvalue. */ |
41990f96 | 2284 | gcc_assert (!lvalue_p (rval)); |
d04a575f | 2285 | |
058dcc25 | 2286 | if (placement != NULL) |
412bbe81 | 2287 | rval = avoid_placement_new_aliasing (rval, placement_expr); |
058dcc25 | 2288 | |
d04a575f | 2289 | return rval; |
8d08fdba | 2290 | } |
63c9a190 MM |
2291 | |
2292 | /* Generate a representation for a C++ "new" expression. PLACEMENT is | |
2293 | a TREE_LIST of placement-new arguments (or NULL_TREE if none). If | |
2294 | NELTS is NULL, TYPE is the type of the storage to be allocated. If | |
2295 | NELTS is not NULL, then this is an array-new allocation; TYPE is | |
2296 | the type of the elements in the array and NELTS is the number of | |
2297 | elements in the array. INIT, if non-NULL, is the initializer for | |
2298 | the new object, or void_zero_node to indicate an initializer of | |
2299 | "()". If USE_GLOBAL_NEW is true, then the user explicitly wrote | |
2300 | "::new" rather than just "new". */ | |
2301 | ||
2302 | tree | |
2303 | build_new (tree placement, tree type, tree nelts, tree init, | |
5ade1ed2 | 2304 | int use_global_new, tsubst_flags_t complain) |
63c9a190 MM |
2305 | { |
2306 | tree rval; | |
2307 | tree orig_placement; | |
2308 | tree orig_nelts; | |
2309 | tree orig_init; | |
2310 | ||
95fb85c6 VR |
2311 | if (placement == error_mark_node || type == error_mark_node |
2312 | || init == error_mark_node) | |
63c9a190 MM |
2313 | return error_mark_node; |
2314 | ||
2315 | orig_placement = placement; | |
2316 | orig_nelts = nelts; | |
2317 | orig_init = init; | |
2318 | ||
b7da27c2 | 2319 | if (nelts == NULL_TREE && init != void_zero_node && list_length (init) == 1) |
86a09a9e JM |
2320 | { |
2321 | tree auto_node = type_uses_auto (type); | |
b7da27c2 | 2322 | if (auto_node && describable_type (TREE_VALUE (init))) |
86a09a9e JM |
2323 | type = do_auto_deduction (type, TREE_VALUE (init), auto_node); |
2324 | } | |
2325 | ||
63c9a190 MM |
2326 | if (processing_template_decl) |
2327 | { | |
2328 | if (dependent_type_p (type) | |
2329 | || any_type_dependent_arguments_p (placement) | |
2330 | || (nelts && type_dependent_expression_p (nelts)) | |
2331 | || (init != void_zero_node | |
2332 | && any_type_dependent_arguments_p (init))) | |
2333 | return build_raw_new_expr (placement, type, nelts, init, | |
2334 | use_global_new); | |
2335 | placement = build_non_dependent_args (placement); | |
2336 | if (nelts) | |
2337 | nelts = build_non_dependent_expr (nelts); | |
2338 | if (init != void_zero_node) | |
2339 | init = build_non_dependent_args (init); | |
2340 | } | |
2341 | ||
2342 | if (nelts) | |
2343 | { | |
2344 | if (!build_expr_type_conversion (WANT_INT | WANT_ENUM, nelts, false)) | |
5ade1ed2 DG |
2345 | { |
2346 | if (complain & tf_error) | |
cbe5f3b3 | 2347 | permerror (input_location, "size in array new must have integral type"); |
5ade1ed2 DG |
2348 | else |
2349 | return error_mark_node; | |
2350 | } | |
b655f214 | 2351 | nelts = cp_save_expr (cp_convert (sizetype, nelts)); |
63c9a190 MM |
2352 | } |
2353 | ||
2354 | /* ``A reference cannot be created by the new operator. A reference | |
2355 | is not an object (8.2.2, 8.4.3), so a pointer to it could not be | |
2356 | returned by new.'' ARM 5.3.3 */ | |
2357 | if (TREE_CODE (type) == REFERENCE_TYPE) | |
2358 | { | |
5ade1ed2 DG |
2359 | if (complain & tf_error) |
2360 | error ("new cannot be applied to a reference type"); | |
2361 | else | |
2362 | return error_mark_node; | |
63c9a190 MM |
2363 | type = TREE_TYPE (type); |
2364 | } | |
2365 | ||
2366 | if (TREE_CODE (type) == FUNCTION_TYPE) | |
2367 | { | |
5ade1ed2 DG |
2368 | if (complain & tf_error) |
2369 | error ("new cannot be applied to a function type"); | |
63c9a190 MM |
2370 | return error_mark_node; |
2371 | } | |
2372 | ||
57ccb546 MM |
2373 | /* The type allocated must be complete. If the new-type-id was |
2374 | "T[N]" then we are just checking that "T" is complete here, but | |
2375 | that is equivalent, since the value of "N" doesn't matter. */ | |
39fb9d72 DB |
2376 | if (!complete_type_or_else (type, NULL_TREE)) |
2377 | return error_mark_node; | |
2378 | ||
5ade1ed2 | 2379 | rval = build_new_1 (placement, type, nelts, init, use_global_new, complain); |
63c9a190 MM |
2380 | if (rval == error_mark_node) |
2381 | return error_mark_node; | |
2382 | ||
2383 | if (processing_template_decl) | |
2384 | return build_raw_new_expr (orig_placement, type, orig_nelts, orig_init, | |
2385 | use_global_new); | |
2386 | ||
2387 | /* Wrap it in a NOP_EXPR so warn_if_unused_value doesn't complain. */ | |
2388 | rval = build1 (NOP_EXPR, TREE_TYPE (rval), rval); | |
2389 | TREE_NO_WARNING (rval) = 1; | |
2390 | ||
2391 | return rval; | |
2392 | } | |
2393 | ||
2394 | /* Given a Java class, return a decl for the corresponding java.lang.Class. */ | |
2395 | ||
2396 | tree | |
2397 | build_java_class_ref (tree type) | |
2398 | { | |
2399 | tree name = NULL_TREE, class_decl; | |
2400 | static tree CL_suffix = NULL_TREE; | |
2401 | if (CL_suffix == NULL_TREE) | |
2402 | CL_suffix = get_identifier("class$"); | |
2403 | if (jclass_node == NULL_TREE) | |
2404 | { | |
2405 | jclass_node = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass")); | |
2406 | if (jclass_node == NULL_TREE) | |
a3d536f1 VR |
2407 | { |
2408 | error ("call to Java constructor, while %<jclass%> undefined"); | |
2409 | return error_mark_node; | |
2410 | } | |
63c9a190 MM |
2411 | jclass_node = TREE_TYPE (jclass_node); |
2412 | } | |
2413 | ||
2414 | /* Mangle the class$ field. */ | |
2415 | { | |
2416 | tree field; | |
2417 | for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) | |
2418 | if (DECL_NAME (field) == CL_suffix) | |
2419 | { | |
2420 | mangle_decl (field); | |
2421 | name = DECL_ASSEMBLER_NAME (field); | |
2422 | break; | |
2423 | } | |
2424 | if (!field) | |
a3d536f1 VR |
2425 | { |
2426 | error ("can't find %<class$%> in %qT", type); | |
2427 | return error_mark_node; | |
2428 | } | |
2429 | } | |
63c9a190 MM |
2430 | |
2431 | class_decl = IDENTIFIER_GLOBAL_VALUE (name); | |
2432 | if (class_decl == NULL_TREE) | |
2433 | { | |
2434 | class_decl = build_decl (VAR_DECL, name, TREE_TYPE (jclass_node)); | |
2435 | TREE_STATIC (class_decl) = 1; | |
2436 | DECL_EXTERNAL (class_decl) = 1; | |
2437 | TREE_PUBLIC (class_decl) = 1; | |
2438 | DECL_ARTIFICIAL (class_decl) = 1; | |
2439 | DECL_IGNORED_P (class_decl) = 1; | |
2440 | pushdecl_top_level (class_decl); | |
2441 | make_decl_rtl (class_decl); | |
2442 | } | |
2443 | return class_decl; | |
2444 | } | |
8d08fdba | 2445 | \f |
f30432d7 | 2446 | static tree |
362efdc1 NN |
2447 | build_vec_delete_1 (tree base, tree maxindex, tree type, |
2448 | special_function_kind auto_delete_vec, int use_global_delete) | |
f30432d7 MS |
2449 | { |
2450 | tree virtual_size; | |
e92cc029 | 2451 | tree ptype = build_pointer_type (type = complete_type (type)); |
f30432d7 MS |
2452 | tree size_exp = size_in_bytes (type); |
2453 | ||
2454 | /* Temporary variables used by the loop. */ | |
2455 | tree tbase, tbase_init; | |
2456 | ||
2457 | /* This is the body of the loop that implements the deletion of a | |
2458 | single element, and moves temp variables to next elements. */ | |
2459 | tree body; | |
2460 | ||
2461 | /* This is the LOOP_EXPR that governs the deletion of the elements. */ | |
c7b62f14 | 2462 | tree loop = 0; |
f30432d7 MS |
2463 | |
2464 | /* This is the thing that governs what to do after the loop has run. */ | |
2465 | tree deallocate_expr = 0; | |
2466 | ||
2467 | /* This is the BIND_EXPR which holds the outermost iterator of the | |
2468 | loop. It is convenient to set this variable up and test it before | |
2469 | executing any other code in the loop. | |
2470 | This is also the containing expression returned by this function. */ | |
2471 | tree controller = NULL_TREE; | |
5be014d5 | 2472 | tree tmp; |
f30432d7 | 2473 | |
b2153b98 | 2474 | /* We should only have 1-D arrays here. */ |
8dc2b103 | 2475 | gcc_assert (TREE_CODE (type) != ARRAY_TYPE); |
b2153b98 | 2476 | |
9e1e64ec | 2477 | if (! MAYBE_CLASS_TYPE_P (type) || TYPE_HAS_TRIVIAL_DESTRUCTOR (type)) |
c7b62f14 | 2478 | goto no_destructor; |
f30432d7 | 2479 | |
708cae97 | 2480 | /* The below is short by the cookie size. */ |
fed3cef0 RK |
2481 | virtual_size = size_binop (MULT_EXPR, size_exp, |
2482 | convert (sizetype, maxindex)); | |
f30432d7 | 2483 | |
46e8c075 | 2484 | tbase = create_temporary_var (ptype); |
5ade1ed2 DG |
2485 | tbase_init = cp_build_modify_expr (tbase, NOP_EXPR, |
2486 | fold_build2 (POINTER_PLUS_EXPR, ptype, | |
2487 | fold_convert (ptype, base), | |
2488 | virtual_size), | |
2489 | tf_warning_or_error); | |
f30432d7 | 2490 | DECL_REGISTER (tbase) = 1; |
f293ce4b RS |
2491 | controller = build3 (BIND_EXPR, void_type_node, tbase, |
2492 | NULL_TREE, NULL_TREE); | |
f30432d7 | 2493 | TREE_SIDE_EFFECTS (controller) = 1; |
f30432d7 | 2494 | |
f293ce4b | 2495 | body = build1 (EXIT_EXPR, void_type_node, |
5cd88d68 RS |
2496 | build2 (EQ_EXPR, boolean_type_node, tbase, |
2497 | fold_convert (ptype, base))); | |
5be014d5 | 2498 | tmp = fold_build1 (NEGATE_EXPR, sizetype, size_exp); |
c7b62f14 | 2499 | body = build_compound_expr |
5ade1ed2 DG |
2500 | (body, cp_build_modify_expr (tbase, NOP_EXPR, |
2501 | build2 (POINTER_PLUS_EXPR, ptype, tbase, tmp), | |
525521b6 | 2502 | tf_warning_or_error)); |
c7b62f14 NS |
2503 | body = build_compound_expr |
2504 | (body, build_delete (ptype, tbase, sfk_complete_destructor, | |
525521b6 | 2505 | LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 1)); |
f30432d7 | 2506 | |
f293ce4b | 2507 | loop = build1 (LOOP_EXPR, void_type_node, body); |
525521b6 | 2508 | loop = build_compound_expr (tbase_init, loop); |
f30432d7 MS |
2509 | |
2510 | no_destructor: | |
2511 | /* If the delete flag is one, or anything else with the low bit set, | |
2512 | delete the storage. */ | |
86f45d2c | 2513 | if (auto_delete_vec != sfk_base_destructor) |
f30432d7 MS |
2514 | { |
2515 | tree base_tbd; | |
2516 | ||
708cae97 | 2517 | /* The below is short by the cookie size. */ |
fed3cef0 RK |
2518 | virtual_size = size_binop (MULT_EXPR, size_exp, |
2519 | convert (sizetype, maxindex)); | |
f30432d7 MS |
2520 | |
2521 | if (! TYPE_VEC_NEW_USES_COOKIE (type)) | |
2522 | /* no header */ | |
2523 | base_tbd = base; | |
2524 | else | |
2525 | { | |
834c6dff MM |
2526 | tree cookie_size; |
2527 | ||
46e995e0 | 2528 | cookie_size = targetm.cxx.get_cookie_size (type); |
c8094d83 | 2529 | base_tbd |
834c6dff | 2530 | = cp_convert (ptype, |
ba47d38d AH |
2531 | cp_build_binary_op (input_location, |
2532 | MINUS_EXPR, | |
c8094d83 | 2533 | cp_convert (string_type_node, |
ab76ca54 | 2534 | base), |
5ade1ed2 DG |
2535 | cookie_size, |
2536 | tf_warning_or_error)); | |
e92cc029 | 2537 | /* True size with header. */ |
834c6dff | 2538 | virtual_size = size_binop (PLUS_EXPR, virtual_size, cookie_size); |
f30432d7 | 2539 | } |
86f45d2c MM |
2540 | |
2541 | if (auto_delete_vec == sfk_deleting_destructor) | |
1c71c747 VR |
2542 | deallocate_expr = build_op_delete_call (VEC_DELETE_EXPR, |
2543 | base_tbd, virtual_size, | |
2544 | use_global_delete & 1, | |
3db45ab5 | 2545 | /*placement=*/NULL_TREE, |
63c9a190 | 2546 | /*alloc_fn=*/NULL_TREE); |
f30432d7 MS |
2547 | } |
2548 | ||
c7b62f14 NS |
2549 | body = loop; |
2550 | if (!deallocate_expr) | |
2551 | ; | |
2552 | else if (!body) | |
2553 | body = deallocate_expr; | |
f30432d7 | 2554 | else |
525521b6 | 2555 | body = build_compound_expr (body, deallocate_expr); |
c8094d83 | 2556 | |
c7b62f14 NS |
2557 | if (!body) |
2558 | body = integer_zero_node; | |
c8094d83 | 2559 | |
f30432d7 | 2560 | /* Outermost wrapper: If pointer is null, punt. */ |
7866705a SB |
2561 | body = fold_build3 (COND_EXPR, void_type_node, |
2562 | fold_build2 (NE_EXPR, boolean_type_node, base, | |
2563 | convert (TREE_TYPE (base), | |
2564 | integer_zero_node)), | |
2565 | body, integer_zero_node); | |
f30432d7 MS |
2566 | body = build1 (NOP_EXPR, void_type_node, body); |
2567 | ||
2568 | if (controller) | |
2569 | { | |
2570 | TREE_OPERAND (controller, 1) = body; | |
4e8dca1c | 2571 | body = controller; |
f30432d7 | 2572 | } |
4e8dca1c JM |
2573 | |
2574 | if (TREE_CODE (base) == SAVE_EXPR) | |
2575 | /* Pre-evaluate the SAVE_EXPR outside of the BIND_EXPR. */ | |
f293ce4b | 2576 | body = build2 (COMPOUND_EXPR, void_type_node, base, body); |
4e8dca1c | 2577 | |
5ade1ed2 | 2578 | return convert_to_void (body, /*implicit=*/NULL, tf_warning_or_error); |
f30432d7 MS |
2579 | } |
2580 | ||
c8094d83 | 2581 | /* Create an unnamed variable of the indicated TYPE. */ |
c395453c | 2582 | |
f1dedc31 | 2583 | tree |
362efdc1 | 2584 | create_temporary_var (tree type) |
8a72a046 | 2585 | { |
f1dedc31 | 2586 | tree decl; |
c8094d83 | 2587 | |
f1dedc31 MM |
2588 | decl = build_decl (VAR_DECL, NULL_TREE, type); |
2589 | TREE_USED (decl) = 1; | |
2590 | DECL_ARTIFICIAL (decl) = 1; | |
f1dedc31 | 2591 | DECL_IGNORED_P (decl) = 1; |
78e0d62b | 2592 | DECL_SOURCE_LOCATION (decl) = input_location; |
b35d4555 | 2593 | DECL_CONTEXT (decl) = current_function_decl; |
f1dedc31 | 2594 | |
f1dedc31 | 2595 | return decl; |
8a72a046 MM |
2596 | } |
2597 | ||
f1dedc31 MM |
2598 | /* Create a new temporary variable of the indicated TYPE, initialized |
2599 | to INIT. | |
8a72a046 | 2600 | |
f1dedc31 MM |
2601 | It is not entered into current_binding_level, because that breaks |
2602 | things when it comes time to do final cleanups (which take place | |
2603 | "outside" the binding contour of the function). */ | |
2604 | ||
2605 | static tree | |
362efdc1 | 2606 | get_temp_regvar (tree type, tree init) |
f30432d7 | 2607 | { |
f1dedc31 | 2608 | tree decl; |
8a72a046 | 2609 | |
f1dedc31 | 2610 | decl = create_temporary_var (type); |
350fae66 | 2611 | add_decl_expr (decl); |
c8094d83 | 2612 | |
5ade1ed2 DG |
2613 | finish_expr_stmt (cp_build_modify_expr (decl, INIT_EXPR, init, |
2614 | tf_warning_or_error)); | |
8a72a046 | 2615 | |
f1dedc31 | 2616 | return decl; |
f30432d7 MS |
2617 | } |
2618 | ||
f1dedc31 MM |
2619 | /* `build_vec_init' returns tree structure that performs |
2620 | initialization of a vector of aggregate types. | |
8d08fdba | 2621 | |
9207099b JM |
2622 | BASE is a reference to the vector, of ARRAY_TYPE, or a pointer |
2623 | to the first element, of POINTER_TYPE. | |
a48cccea | 2624 | MAXINDEX is the maximum index of the array (one less than the |
9207099b | 2625 | number of elements). It is only used if BASE is a pointer or |
a48cccea | 2626 | TYPE_DOMAIN (TREE_TYPE (BASE)) == NULL_TREE. |
b84f4651 | 2627 | |
8d08fdba MS |
2628 | INIT is the (possibly NULL) initializer. |
2629 | ||
844ae01d JM |
2630 | If EXPLICIT_VALUE_INIT_P is true, then INIT must be NULL. All |
2631 | elements in the array are value-initialized. | |
b84f4651 | 2632 | |
8d08fdba MS |
2633 | FROM_ARRAY is 0 if we should init everything with INIT |
2634 | (i.e., every element initialized from INIT). | |
2635 | FROM_ARRAY is 1 if we should index into INIT in parallel | |
2636 | with initialization of DECL. | |
2637 | FROM_ARRAY is 2 if we should index into INIT in parallel, | |
2638 | but use assignment instead of initialization. */ | |
2639 | ||
2640 | tree | |
3db45ab5 | 2641 | build_vec_init (tree base, tree maxindex, tree init, |
844ae01d | 2642 | bool explicit_value_init_p, |
5ade1ed2 | 2643 | int from_array, tsubst_flags_t complain) |
8d08fdba MS |
2644 | { |
2645 | tree rval; | |
8a72a046 | 2646 | tree base2 = NULL_TREE; |
8d08fdba | 2647 | tree size; |
e833cb11 | 2648 | tree itype = NULL_TREE; |
8a72a046 | 2649 | tree iterator; |
9207099b | 2650 | /* The type of BASE. */ |
f30efcb7 | 2651 | tree atype = TREE_TYPE (base); |
f1dedc31 | 2652 | /* The type of an element in the array. */ |
f30efcb7 | 2653 | tree type = TREE_TYPE (atype); |
c8094d83 | 2654 | /* The element type reached after removing all outer array |
b5af3133 MM |
2655 | types. */ |
2656 | tree inner_elt_type; | |
f1dedc31 MM |
2657 | /* The type of a pointer to an element in the array. */ |
2658 | tree ptype; | |
2659 | tree stmt_expr; | |
2660 | tree compound_stmt; | |
2661 | int destroy_temps; | |
f5984164 | 2662 | tree try_block = NULL_TREE; |
8a72a046 | 2663 | int num_initialized_elts = 0; |
2a3398e1 | 2664 | bool is_global; |
c8094d83 | 2665 | |
9207099b | 2666 | if (TREE_CODE (atype) == ARRAY_TYPE && TYPE_DOMAIN (atype)) |
a48cccea JM |
2667 | maxindex = array_type_nelts (atype); |
2668 | ||
2669 | if (maxindex == NULL_TREE || maxindex == error_mark_node) | |
8d08fdba MS |
2670 | return error_mark_node; |
2671 | ||
844ae01d | 2672 | if (explicit_value_init_p) |
b84f4651 MM |
2673 | gcc_assert (!init); |
2674 | ||
9207099b | 2675 | inner_elt_type = strip_array_types (type); |
c8a3d889 AO |
2676 | if (init |
2677 | && (from_array == 2 | |
c8094d83 | 2678 | ? (!CLASS_TYPE_P (inner_elt_type) |
b5af3133 | 2679 | || !TYPE_HAS_COMPLEX_ASSIGN_REF (inner_elt_type)) |
c8a3d889 | 2680 | : !TYPE_NEEDS_CONSTRUCTING (type)) |
f30efcb7 JM |
2681 | && ((TREE_CODE (init) == CONSTRUCTOR |
2682 | /* Don't do this if the CONSTRUCTOR might contain something | |
2683 | that might throw and require us to clean up. */ | |
4038c495 | 2684 | && (VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (init)) |
b5af3133 | 2685 | || ! TYPE_HAS_NONTRIVIAL_DESTRUCTOR (inner_elt_type))) |
f30efcb7 JM |
2686 | || from_array)) |
2687 | { | |
2688 | /* Do non-default initialization of POD arrays resulting from | |
2689 | brace-enclosed initializers. In this case, digest_init and | |
2690 | store_constructor will handle the semantics for us. */ | |
2691 | ||
9207099b | 2692 | gcc_assert (TREE_CODE (atype) == ARRAY_TYPE); |
f293ce4b | 2693 | stmt_expr = build2 (INIT_EXPR, atype, base, init); |
f30efcb7 JM |
2694 | return stmt_expr; |
2695 | } | |
2696 | ||
2697 | maxindex = cp_convert (ptrdiff_type_node, maxindex); | |
8d08fdba | 2698 | size = size_in_bytes (type); |
9207099b JM |
2699 | if (TREE_CODE (atype) == ARRAY_TYPE) |
2700 | { | |
2701 | ptype = build_pointer_type (type); | |
2702 | base = cp_convert (ptype, decay_conversion (base)); | |
2703 | } | |
2704 | else | |
2705 | ptype = atype; | |
8d08fdba | 2706 | |
f1dedc31 | 2707 | /* The code we are generating looks like: |
303b7406 | 2708 | ({ |
f1dedc31 | 2709 | T* t1 = (T*) base; |
f30efcb7 | 2710 | T* rval = t1; |
f1dedc31 MM |
2711 | ptrdiff_t iterator = maxindex; |
2712 | try { | |
4977bab6 | 2713 | for (; iterator != -1; --iterator) { |
f30efcb7 JM |
2714 | ... initialize *t1 ... |
2715 | ++t1; | |
4977bab6 | 2716 | } |
f1dedc31 | 2717 | } catch (...) { |
0cbd7506 | 2718 | ... destroy elements that were constructed ... |
f1dedc31 | 2719 | } |
303b7406 NS |
2720 | rval; |
2721 | }) | |
c8094d83 | 2722 | |
f1dedc31 MM |
2723 | We can omit the try and catch blocks if we know that the |
2724 | initialization will never throw an exception, or if the array | |
f30efcb7 | 2725 | elements do not have destructors. We can omit the loop completely if |
c8094d83 | 2726 | the elements of the array do not have constructors. |
f1dedc31 MM |
2727 | |
2728 | We actually wrap the entire body of the above in a STMT_EXPR, for | |
c8094d83 | 2729 | tidiness. |
f1dedc31 MM |
2730 | |
2731 | When copying from array to another, when the array elements have | |
2732 | only trivial copy constructors, we should use __builtin_memcpy | |
2733 | rather than generating a loop. That way, we could take advantage | |
3b426391 | 2734 | of whatever cleverness the back end has for dealing with copies |
f1dedc31 MM |
2735 | of blocks of memory. */ |
2736 | ||
2a3398e1 | 2737 | is_global = begin_init_stmts (&stmt_expr, &compound_stmt); |
f2c5f623 | 2738 | destroy_temps = stmts_are_full_exprs_p (); |
ae499cce | 2739 | current_stmt_tree ()->stmts_are_full_exprs_p = 0; |
f30efcb7 | 2740 | rval = get_temp_regvar (ptype, base); |
f1dedc31 | 2741 | base = get_temp_regvar (ptype, rval); |
8a72a046 | 2742 | iterator = get_temp_regvar (ptrdiff_type_node, maxindex); |
8d08fdba | 2743 | |
8a72a046 | 2744 | /* Protect the entire array initialization so that we can destroy |
f30efcb7 JM |
2745 | the partially constructed array if an exception is thrown. |
2746 | But don't do this if we're assigning. */ | |
2747 | if (flag_exceptions && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) | |
2748 | && from_array != 2) | |
ed5511d9 MM |
2749 | { |
2750 | try_block = begin_try_block (); | |
ed5511d9 | 2751 | } |
8a72a046 | 2752 | |
f30efcb7 | 2753 | if (init != NULL_TREE && TREE_CODE (init) == CONSTRUCTOR) |
8d08fdba | 2754 | { |
f30efcb7 JM |
2755 | /* Do non-default initialization of non-POD arrays resulting from |
2756 | brace-enclosed initializers. */ | |
4038c495 GB |
2757 | unsigned HOST_WIDE_INT idx; |
2758 | tree elt; | |
094fe153 JM |
2759 | from_array = 0; |
2760 | ||
4038c495 | 2761 | FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init), idx, elt) |
8d08fdba | 2762 | { |
f1dedc31 | 2763 | tree baseref = build1 (INDIRECT_REF, type, base); |
8d08fdba | 2764 | |
8a72a046 | 2765 | num_initialized_elts++; |
8d08fdba | 2766 | |
67c03833 | 2767 | current_stmt_tree ()->stmts_are_full_exprs_p = 1; |
9e1e64ec | 2768 | if (MAYBE_CLASS_TYPE_P (type) || TREE_CODE (type) == ARRAY_TYPE) |
5ade1ed2 | 2769 | finish_expr_stmt (build_aggr_init (baseref, elt, 0, complain)); |
8a72a046 | 2770 | else |
5ade1ed2 DG |
2771 | finish_expr_stmt (cp_build_modify_expr (baseref, NOP_EXPR, |
2772 | elt, complain)); | |
67c03833 | 2773 | current_stmt_tree ()->stmts_are_full_exprs_p = 0; |
8a72a046 | 2774 | |
5ade1ed2 DG |
2775 | finish_expr_stmt (cp_build_unary_op (PREINCREMENT_EXPR, base, 0, |
2776 | complain)); | |
2777 | finish_expr_stmt (cp_build_unary_op (PREDECREMENT_EXPR, iterator, 0, | |
2778 | complain)); | |
8d08fdba | 2779 | } |
8d08fdba | 2780 | |
8a72a046 MM |
2781 | /* Clear out INIT so that we don't get confused below. */ |
2782 | init = NULL_TREE; | |
8d08fdba | 2783 | } |
8a72a046 | 2784 | else if (from_array) |
8d08fdba | 2785 | { |
8a72a046 MM |
2786 | /* If initializing one array from another, initialize element by |
2787 | element. We rely upon the below calls the do argument | |
c8094d83 | 2788 | checking. */ |
8a72a046 MM |
2789 | if (init) |
2790 | { | |
0a72704b | 2791 | base2 = decay_conversion (init); |
8a72a046 MM |
2792 | itype = TREE_TYPE (base2); |
2793 | base2 = get_temp_regvar (itype, base2); | |
2794 | itype = TREE_TYPE (itype); | |
2795 | } | |
2796 | else if (TYPE_LANG_SPECIFIC (type) | |
2797 | && TYPE_NEEDS_CONSTRUCTING (type) | |
2798 | && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) | |
2799 | { | |
5ade1ed2 DG |
2800 | if (complain & tf_error) |
2801 | error ("initializer ends prematurely"); | |
8a72a046 MM |
2802 | return error_mark_node; |
2803 | } | |
2804 | } | |
8d08fdba | 2805 | |
8a72a046 MM |
2806 | /* Now, default-initialize any remaining elements. We don't need to |
2807 | do that if a) the type does not need constructing, or b) we've | |
094fe153 JM |
2808 | already initialized all the elements. |
2809 | ||
2810 | We do need to keep going if we're copying an array. */ | |
2811 | ||
2812 | if (from_array | |
844ae01d | 2813 | || ((TYPE_NEEDS_CONSTRUCTING (type) || explicit_value_init_p) |
665f2503 | 2814 | && ! (host_integerp (maxindex, 0) |
05bccae2 | 2815 | && (num_initialized_elts |
665f2503 | 2816 | == tree_low_cst (maxindex, 0) + 1)))) |
8a72a046 | 2817 | { |
37e05cd5 | 2818 | /* If the ITERATOR is equal to -1, then we don't have to loop; |
8a72a046 | 2819 | we've already initialized all the elements. */ |
4977bab6 | 2820 | tree for_stmt; |
f1dedc31 | 2821 | tree elt_init; |
b84f4651 | 2822 | tree to; |
f1dedc31 | 2823 | |
4977bab6 ZW |
2824 | for_stmt = begin_for_stmt (); |
2825 | finish_for_init_stmt (for_stmt); | |
aab384ae RG |
2826 | finish_for_cond (build2 (NE_EXPR, boolean_type_node, iterator, |
2827 | build_int_cst (TREE_TYPE (iterator), -1)), | |
4977bab6 | 2828 | for_stmt); |
5ade1ed2 DG |
2829 | finish_for_expr (cp_build_unary_op (PREDECREMENT_EXPR, iterator, 0, |
2830 | complain), | |
4977bab6 | 2831 | for_stmt); |
8d08fdba | 2832 | |
b84f4651 MM |
2833 | to = build1 (INDIRECT_REF, type, base); |
2834 | ||
8d08fdba MS |
2835 | if (from_array) |
2836 | { | |
8d08fdba MS |
2837 | tree from; |
2838 | ||
2839 | if (base2) | |
2840 | from = build1 (INDIRECT_REF, itype, base2); | |
2841 | else | |
2842 | from = NULL_TREE; | |
2843 | ||
2844 | if (from_array == 2) | |
5ade1ed2 DG |
2845 | elt_init = cp_build_modify_expr (to, NOP_EXPR, from, |
2846 | complain); | |
8d08fdba | 2847 | else if (TYPE_NEEDS_CONSTRUCTING (type)) |
5ade1ed2 | 2848 | elt_init = build_aggr_init (to, from, 0, complain); |
8d08fdba | 2849 | else if (from) |
5ade1ed2 DG |
2850 | elt_init = cp_build_modify_expr (to, NOP_EXPR, from, |
2851 | complain); | |
8d08fdba | 2852 | else |
8dc2b103 | 2853 | gcc_unreachable (); |
8d08fdba MS |
2854 | } |
2855 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
2856 | { | |
2857 | if (init != 0) | |
f30efcb7 JM |
2858 | sorry |
2859 | ("cannot initialize multi-dimensional array with initializer"); | |
2860 | elt_init = build_vec_init (build1 (INDIRECT_REF, type, base), | |
3db45ab5 | 2861 | 0, 0, |
844ae01d | 2862 | explicit_value_init_p, |
5ade1ed2 | 2863 | 0, complain); |
f1dedc31 | 2864 | } |
844ae01d JM |
2865 | else if (explicit_value_init_p) |
2866 | elt_init = build2 (INIT_EXPR, type, to, | |
2867 | build_value_init (type)); | |
f1dedc31 | 2868 | else |
844ae01d JM |
2869 | { |
2870 | gcc_assert (TYPE_NEEDS_CONSTRUCTING (type)); | |
2871 | elt_init = build_aggr_init (to, init, 0, complain); | |
2872 | } | |
c8094d83 | 2873 | |
2a3398e1 NS |
2874 | current_stmt_tree ()->stmts_are_full_exprs_p = 1; |
2875 | finish_expr_stmt (elt_init); | |
2876 | current_stmt_tree ()->stmts_are_full_exprs_p = 0; | |
8d08fdba | 2877 | |
5ade1ed2 DG |
2878 | finish_expr_stmt (cp_build_unary_op (PREINCREMENT_EXPR, base, 0, |
2879 | complain)); | |
8d08fdba | 2880 | if (base2) |
5ade1ed2 DG |
2881 | finish_expr_stmt (cp_build_unary_op (PREINCREMENT_EXPR, base2, 0, |
2882 | complain)); | |
0fac6b0b | 2883 | |
4977bab6 | 2884 | finish_for_stmt (for_stmt); |
8d08fdba | 2885 | } |
8a72a046 MM |
2886 | |
2887 | /* Make sure to cleanup any partially constructed elements. */ | |
f30efcb7 JM |
2888 | if (flag_exceptions && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) |
2889 | && from_array != 2) | |
f1dedc31 MM |
2890 | { |
2891 | tree e; | |
ba47d38d AH |
2892 | tree m = cp_build_binary_op (input_location, |
2893 | MINUS_EXPR, maxindex, iterator, | |
5ade1ed2 | 2894 | complain); |
b2153b98 KL |
2895 | |
2896 | /* Flatten multi-dimensional array since build_vec_delete only | |
2897 | expects one-dimensional array. */ | |
2898 | if (TREE_CODE (type) == ARRAY_TYPE) | |
ba47d38d AH |
2899 | m = cp_build_binary_op (input_location, |
2900 | MULT_EXPR, m, | |
5ade1ed2 DG |
2901 | array_type_nelts_total (type), |
2902 | complain); | |
8d08fdba | 2903 | |
ed5511d9 | 2904 | finish_cleanup_try_block (try_block); |
c8094d83 | 2905 | e = build_vec_delete_1 (rval, m, |
b5af3133 | 2906 | inner_elt_type, sfk_base_destructor, |
f1dedc31 | 2907 | /*use_global_delete=*/0); |
f1dedc31 MM |
2908 | finish_cleanup (e, try_block); |
2909 | } | |
2910 | ||
303b7406 NS |
2911 | /* The value of the array initialization is the array itself, RVAL |
2912 | is a pointer to the first element. */ | |
325c3691 | 2913 | finish_stmt_expr_expr (rval, stmt_expr); |
f1dedc31 | 2914 | |
2a3398e1 | 2915 | stmt_expr = finish_init_stmts (is_global, stmt_expr, compound_stmt); |
303b7406 | 2916 | |
9207099b JM |
2917 | /* Now make the result have the correct type. */ |
2918 | if (TREE_CODE (atype) == ARRAY_TYPE) | |
2919 | { | |
2920 | atype = build_pointer_type (atype); | |
2921 | stmt_expr = build1 (NOP_EXPR, atype, stmt_expr); | |
2922 | stmt_expr = cp_build_indirect_ref (stmt_expr, NULL, complain); | |
2923 | } | |
c8094d83 | 2924 | |
ae499cce | 2925 | current_stmt_tree ()->stmts_are_full_exprs_p = destroy_temps; |
f1dedc31 | 2926 | return stmt_expr; |
8d08fdba MS |
2927 | } |
2928 | ||
86f45d2c MM |
2929 | /* Call the DTOR_KIND destructor for EXP. FLAGS are as for |
2930 | build_delete. */ | |
298d6f60 MM |
2931 | |
2932 | static tree | |
362efdc1 | 2933 | build_dtor_call (tree exp, special_function_kind dtor_kind, int flags) |
298d6f60 | 2934 | { |
86f45d2c | 2935 | tree name; |
ee76b931 | 2936 | tree fn; |
86f45d2c MM |
2937 | switch (dtor_kind) |
2938 | { | |
2939 | case sfk_complete_destructor: | |
2940 | name = complete_dtor_identifier; | |
2941 | break; | |
2942 | ||
2943 | case sfk_base_destructor: | |
2944 | name = base_dtor_identifier; | |
2945 | break; | |
2946 | ||
2947 | case sfk_deleting_destructor: | |
2948 | name = deleting_dtor_identifier; | |
2949 | break; | |
2950 | ||
2951 | default: | |
8dc2b103 | 2952 | gcc_unreachable (); |
86f45d2c | 2953 | } |
ee76b931 | 2954 | fn = lookup_fnfields (TREE_TYPE (exp), name, /*protect=*/2); |
c8094d83 | 2955 | return build_new_method_call (exp, fn, |
ee76b931 MM |
2956 | /*args=*/NULL_TREE, |
2957 | /*conversion_path=*/NULL_TREE, | |
63c9a190 | 2958 | flags, |
5ade1ed2 DG |
2959 | /*fn_p=*/NULL, |
2960 | tf_warning_or_error); | |
298d6f60 MM |
2961 | } |
2962 | ||
8d08fdba MS |
2963 | /* Generate a call to a destructor. TYPE is the type to cast ADDR to. |
2964 | ADDR is an expression which yields the store to be destroyed. | |
86f45d2c MM |
2965 | AUTO_DELETE is the name of the destructor to call, i.e., either |
2966 | sfk_complete_destructor, sfk_base_destructor, or | |
2967 | sfk_deleting_destructor. | |
8d08fdba MS |
2968 | |
2969 | FLAGS is the logical disjunction of zero or more LOOKUP_ | |
ade3dc07 | 2970 | flags. See cp-tree.h for more info. */ |
e92cc029 | 2971 | |
8d08fdba | 2972 | tree |
362efdc1 NN |
2973 | build_delete (tree type, tree addr, special_function_kind auto_delete, |
2974 | int flags, int use_global_delete) | |
8d08fdba | 2975 | { |
8d08fdba | 2976 | tree expr; |
8d08fdba MS |
2977 | |
2978 | if (addr == error_mark_node) | |
2979 | return error_mark_node; | |
2980 | ||
2981 | /* Can happen when CURRENT_EXCEPTION_OBJECT gets its type | |
2982 | set to `error_mark_node' before it gets properly cleaned up. */ | |
2983 | if (type == error_mark_node) | |
2984 | return error_mark_node; | |
2985 | ||
2986 | type = TYPE_MAIN_VARIANT (type); | |
2987 | ||
2988 | if (TREE_CODE (type) == POINTER_TYPE) | |
2989 | { | |
b1e5b86c GB |
2990 | bool complete_p = true; |
2991 | ||
2986ae00 | 2992 | type = TYPE_MAIN_VARIANT (TREE_TYPE (type)); |
8d08fdba MS |
2993 | if (TREE_CODE (type) == ARRAY_TYPE) |
2994 | goto handle_array; | |
23b4deba | 2995 | |
b1e5b86c GB |
2996 | /* We don't want to warn about delete of void*, only other |
2997 | incomplete types. Deleting other incomplete types | |
2998 | invokes undefined behavior, but it is not ill-formed, so | |
2999 | compile to something that would even do The Right Thing | |
3000 | (TM) should the type have a trivial dtor and no delete | |
3001 | operator. */ | |
3002 | if (!VOID_TYPE_P (type)) | |
8d08fdba | 3003 | { |
b1e5b86c GB |
3004 | complete_type (type); |
3005 | if (!COMPLETE_TYPE_P (type)) | |
3006 | { | |
71205d17 MLI |
3007 | if (warning (0, "possible problem detected in invocation of " |
3008 | "delete operator:")) | |
3009 | { | |
3010 | cxx_incomplete_type_diagnostic (addr, type, DK_WARNING); | |
1f5b3869 | 3011 | inform (input_location, "neither the destructor nor the class-specific " |
71205d17 MLI |
3012 | "operator delete will be called, even if they are " |
3013 | "declared when the class is defined."); | |
3014 | } | |
b1e5b86c GB |
3015 | complete_p = false; |
3016 | } | |
8d08fdba | 3017 | } |
9e1e64ec | 3018 | if (VOID_TYPE_P (type) || !complete_p || !MAYBE_CLASS_TYPE_P (type)) |
b1e5b86c GB |
3019 | /* Call the builtin operator delete. */ |
3020 | return build_builtin_delete_call (addr); | |
8d08fdba MS |
3021 | if (TREE_SIDE_EFFECTS (addr)) |
3022 | addr = save_expr (addr); | |
2986ae00 | 3023 | |
f4f206f4 | 3024 | /* Throw away const and volatile on target type of addr. */ |
6060a796 | 3025 | addr = convert_force (build_pointer_type (type), addr, 0); |
8d08fdba MS |
3026 | } |
3027 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
3028 | { | |
3029 | handle_array: | |
c8094d83 | 3030 | |
c407792d RK |
3031 | if (TYPE_DOMAIN (type) == NULL_TREE) |
3032 | { | |
8251199e | 3033 | error ("unknown array size in delete"); |
c407792d RK |
3034 | return error_mark_node; |
3035 | } | |
8d08fdba | 3036 | return build_vec_delete (addr, array_type_nelts (type), |
c7edeea3 | 3037 | auto_delete, use_global_delete); |
8d08fdba MS |
3038 | } |
3039 | else | |
3040 | { | |
3041 | /* Don't check PROTECT here; leave that decision to the | |
3042 | destructor. If the destructor is accessible, call it, | |
3043 | else report error. */ | |
5ade1ed2 | 3044 | addr = cp_build_unary_op (ADDR_EXPR, addr, 0, tf_warning_or_error); |
8d08fdba MS |
3045 | if (TREE_SIDE_EFFECTS (addr)) |
3046 | addr = save_expr (addr); | |
3047 | ||
60696c53 | 3048 | addr = convert_force (build_pointer_type (type), addr, 0); |
8d08fdba MS |
3049 | } |
3050 | ||
9e1e64ec | 3051 | gcc_assert (MAYBE_CLASS_TYPE_P (type)); |
8d08fdba | 3052 | |
834c6dff | 3053 | if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type)) |
8d08fdba | 3054 | { |
60696c53 | 3055 | if (auto_delete != sfk_deleting_destructor) |
8d08fdba MS |
3056 | return void_zero_node; |
3057 | ||
3db45ab5 MS |
3058 | return build_op_delete_call (DELETE_EXPR, addr, |
3059 | cxx_sizeof_nowarn (type), | |
63c9a190 MM |
3060 | use_global_delete, |
3061 | /*placement=*/NULL_TREE, | |
3062 | /*alloc_fn=*/NULL_TREE); | |
8d08fdba | 3063 | } |
ade3dc07 | 3064 | else |
8d08fdba | 3065 | { |
6f06d231 | 3066 | tree head = NULL_TREE; |
700f8a87 | 3067 | tree do_delete = NULL_TREE; |
bd6dd845 | 3068 | tree ifexp; |
700f8a87 | 3069 | |
9f4faeae MM |
3070 | if (CLASSTYPE_LAZY_DESTRUCTOR (type)) |
3071 | lazily_declare_fn (sfk_destructor, type); | |
ade3dc07 | 3072 | |
52682a1b MM |
3073 | /* For `::delete x', we must not use the deleting destructor |
3074 | since then we would not be sure to get the global `operator | |
3075 | delete'. */ | |
86f45d2c | 3076 | if (use_global_delete && auto_delete == sfk_deleting_destructor) |
700f8a87 | 3077 | { |
1b4a93f7 MM |
3078 | /* We will use ADDR multiple times so we must save it. */ |
3079 | addr = save_expr (addr); | |
6f06d231 | 3080 | head = get_target_expr (build_headof (addr)); |
c6002625 | 3081 | /* Delete the object. */ |
6f06d231 | 3082 | do_delete = build_builtin_delete_call (head); |
86f45d2c MM |
3083 | /* Otherwise, treat this like a complete object destructor |
3084 | call. */ | |
3085 | auto_delete = sfk_complete_destructor; | |
700f8a87 | 3086 | } |
52682a1b MM |
3087 | /* If the destructor is non-virtual, there is no deleting |
3088 | variant. Instead, we must explicitly call the appropriate | |
3089 | `operator delete' here. */ | |
3090 | else if (!DECL_VIRTUAL_P (CLASSTYPE_DESTRUCTORS (type)) | |
3091 | && auto_delete == sfk_deleting_destructor) | |
3092 | { | |
1b4a93f7 MM |
3093 | /* We will use ADDR multiple times so we must save it. */ |
3094 | addr = save_expr (addr); | |
3095 | /* Build the call. */ | |
52682a1b MM |
3096 | do_delete = build_op_delete_call (DELETE_EXPR, |
3097 | addr, | |
ea793912 | 3098 | cxx_sizeof_nowarn (type), |
5bd61841 | 3099 | /*global_p=*/false, |
63c9a190 MM |
3100 | /*placement=*/NULL_TREE, |
3101 | /*alloc_fn=*/NULL_TREE); | |
52682a1b MM |
3102 | /* Call the complete object destructor. */ |
3103 | auto_delete = sfk_complete_destructor; | |
3104 | } | |
e3fe84e5 JM |
3105 | else if (auto_delete == sfk_deleting_destructor |
3106 | && TYPE_GETS_REG_DELETE (type)) | |
3107 | { | |
3108 | /* Make sure we have access to the member op delete, even though | |
3109 | we'll actually be calling it from the destructor. */ | |
ea793912 | 3110 | build_op_delete_call (DELETE_EXPR, addr, cxx_sizeof_nowarn (type), |
3db45ab5 | 3111 | /*global_p=*/false, |
63c9a190 MM |
3112 | /*placement=*/NULL_TREE, |
3113 | /*alloc_fn=*/NULL_TREE); | |
e3fe84e5 | 3114 | } |
8d08fdba | 3115 | |
5ade1ed2 DG |
3116 | expr = build_dtor_call (cp_build_indirect_ref (addr, NULL, |
3117 | tf_warning_or_error), | |
1b4a93f7 | 3118 | auto_delete, flags); |
bd6dd845 | 3119 | if (do_delete) |
f293ce4b | 3120 | expr = build2 (COMPOUND_EXPR, void_type_node, expr, do_delete); |
9e9ff709 | 3121 | |
6f06d231 JM |
3122 | /* We need to calculate this before the dtor changes the vptr. */ |
3123 | if (head) | |
3124 | expr = build2 (COMPOUND_EXPR, void_type_node, head, expr); | |
3125 | ||
bd6dd845 MS |
3126 | if (flags & LOOKUP_DESTRUCTOR) |
3127 | /* Explicit destructor call; don't check for null pointer. */ | |
3128 | ifexp = integer_one_node; | |
8d08fdba | 3129 | else |
bd6dd845 | 3130 | /* Handle deleting a null pointer. */ |
ba47d38d AH |
3131 | ifexp = fold (cp_build_binary_op (input_location, |
3132 | NE_EXPR, addr, integer_zero_node, | |
5ade1ed2 | 3133 | tf_warning_or_error)); |
8d08fdba | 3134 | |
bd6dd845 | 3135 | if (ifexp != integer_one_node) |
f293ce4b RS |
3136 | expr = build3 (COND_EXPR, void_type_node, |
3137 | ifexp, expr, void_zero_node); | |
8d08fdba | 3138 | |
8d08fdba MS |
3139 | return expr; |
3140 | } | |
ade3dc07 | 3141 | } |
8d08fdba | 3142 | |
ade3dc07 JM |
3143 | /* At the beginning of a destructor, push cleanups that will call the |
3144 | destructors for our base classes and members. | |
2a2480e1 | 3145 | |
a29e1034 | 3146 | Called from begin_destructor_body. */ |
8d08fdba | 3147 | |
ade3dc07 | 3148 | void |
edaf3e03 | 3149 | push_base_cleanups (void) |
ade3dc07 | 3150 | { |
fa743e8c NS |
3151 | tree binfo, base_binfo; |
3152 | int i; | |
ade3dc07 JM |
3153 | tree member; |
3154 | tree expr; | |
d4e6fecb | 3155 | VEC(tree,gc) *vbases; |
8d08fdba | 3156 | |
ade3dc07 | 3157 | /* Run destructors for all virtual baseclasses. */ |
5775a06a | 3158 | if (CLASSTYPE_VBASECLASSES (current_class_type)) |
ade3dc07 | 3159 | { |
ade3dc07 | 3160 | tree cond = (condition_conversion |
f293ce4b RS |
3161 | (build2 (BIT_AND_EXPR, integer_type_node, |
3162 | current_in_charge_parm, | |
3163 | integer_two_node))); | |
8d08fdba | 3164 | |
58c42dc2 | 3165 | /* The CLASSTYPE_VBASECLASSES vector is in initialization |
ade3dc07 | 3166 | order, which is also the right order for pushing cleanups. */ |
9ba5ff0f NS |
3167 | for (vbases = CLASSTYPE_VBASECLASSES (current_class_type), i = 0; |
3168 | VEC_iterate (tree, vbases, i, base_binfo); i++) | |
8d08fdba | 3169 | { |
9ba5ff0f | 3170 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (BINFO_TYPE (base_binfo))) |
8d08fdba | 3171 | { |
c8094d83 | 3172 | expr = build_special_member_call (current_class_ref, |
4ba126e4 MM |
3173 | base_dtor_identifier, |
3174 | NULL_TREE, | |
9ba5ff0f | 3175 | base_binfo, |
c8094d83 | 3176 | (LOOKUP_NORMAL |
5ade1ed2 DG |
3177 | | LOOKUP_NONVIRTUAL), |
3178 | tf_warning_or_error); | |
f293ce4b RS |
3179 | expr = build3 (COND_EXPR, void_type_node, cond, |
3180 | expr, void_zero_node); | |
ade3dc07 | 3181 | finish_decl_cleanup (NULL_TREE, expr); |
8d08fdba MS |
3182 | } |
3183 | } | |
ade3dc07 JM |
3184 | } |
3185 | ||
ade3dc07 | 3186 | /* Take care of the remaining baseclasses. */ |
fa743e8c NS |
3187 | for (binfo = TYPE_BINFO (current_class_type), i = 0; |
3188 | BINFO_BASE_ITERATE (binfo, i, base_binfo); i++) | |
ade3dc07 | 3189 | { |
ade3dc07 | 3190 | if (TYPE_HAS_TRIVIAL_DESTRUCTOR (BINFO_TYPE (base_binfo)) |
809e3e7f | 3191 | || BINFO_VIRTUAL_P (base_binfo)) |
ade3dc07 JM |
3192 | continue; |
3193 | ||
c8094d83 | 3194 | expr = build_special_member_call (current_class_ref, |
4ba126e4 | 3195 | base_dtor_identifier, |
c8094d83 | 3196 | NULL_TREE, base_binfo, |
5ade1ed2 DG |
3197 | LOOKUP_NORMAL | LOOKUP_NONVIRTUAL, |
3198 | tf_warning_or_error); | |
ade3dc07 JM |
3199 | finish_decl_cleanup (NULL_TREE, expr); |
3200 | } | |
3201 | ||
3202 | for (member = TYPE_FIELDS (current_class_type); member; | |
3203 | member = TREE_CHAIN (member)) | |
3204 | { | |
2e5d2970 VR |
3205 | if (TREE_TYPE (member) == error_mark_node |
3206 | || TREE_CODE (member) != FIELD_DECL | |
3207 | || DECL_ARTIFICIAL (member)) | |
ade3dc07 JM |
3208 | continue; |
3209 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (member))) | |
3210 | { | |
c8094d83 MS |
3211 | tree this_member = (build_class_member_access_expr |
3212 | (current_class_ref, member, | |
50ad9642 | 3213 | /*access_path=*/NULL_TREE, |
5ade1ed2 DG |
3214 | /*preserve_reference=*/false, |
3215 | tf_warning_or_error)); | |
ade3dc07 JM |
3216 | tree this_type = TREE_TYPE (member); |
3217 | expr = build_delete (this_type, this_member, | |
3218 | sfk_complete_destructor, | |
3219 | LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR|LOOKUP_NORMAL, | |
3220 | 0); | |
3221 | finish_decl_cleanup (NULL_TREE, expr); | |
3222 | } | |
8d08fdba MS |
3223 | } |
3224 | } | |
3225 | ||
8d08fdba MS |
3226 | /* Build a C++ vector delete expression. |
3227 | MAXINDEX is the number of elements to be deleted. | |
3228 | ELT_SIZE is the nominal size of each element in the vector. | |
3229 | BASE is the expression that should yield the store to be deleted. | |
8d08fdba MS |
3230 | This function expands (or synthesizes) these calls itself. |
3231 | AUTO_DELETE_VEC says whether the container (vector) should be deallocated. | |
8d08fdba MS |
3232 | |
3233 | This also calls delete for virtual baseclasses of elements of the vector. | |
3234 | ||
3235 | Update: MAXINDEX is no longer needed. The size can be extracted from the | |
3236 | start of the vector for pointers, and from the type for arrays. We still | |
3237 | use MAXINDEX for arrays because it happens to already have one of the | |
3238 | values we'd have to extract. (We could use MAXINDEX with pointers to | |
3239 | confirm the size, and trap if the numbers differ; not clear that it'd | |
3240 | be worth bothering.) */ | |
e92cc029 | 3241 | |
8d08fdba | 3242 | tree |
362efdc1 NN |
3243 | build_vec_delete (tree base, tree maxindex, |
3244 | special_function_kind auto_delete_vec, int use_global_delete) | |
8d08fdba | 3245 | { |
f30432d7 | 3246 | tree type; |
49b7aacb JM |
3247 | tree rval; |
3248 | tree base_init = NULL_TREE; | |
8d08fdba | 3249 | |
f30432d7 | 3250 | type = TREE_TYPE (base); |
c407792d | 3251 | |
f30432d7 | 3252 | if (TREE_CODE (type) == POINTER_TYPE) |
8d08fdba MS |
3253 | { |
3254 | /* Step back one from start of vector, and read dimension. */ | |
834c6dff | 3255 | tree cookie_addr; |
726a989a | 3256 | tree size_ptr_type = build_pointer_type (sizetype); |
834c6dff | 3257 | |
6742d92b | 3258 | if (TREE_SIDE_EFFECTS (base)) |
49b7aacb JM |
3259 | { |
3260 | base_init = get_target_expr (base); | |
3261 | base = TARGET_EXPR_SLOT (base_init); | |
3262 | } | |
708cae97 | 3263 | type = strip_array_types (TREE_TYPE (type)); |
5be014d5 AP |
3264 | cookie_addr = fold_build1 (NEGATE_EXPR, sizetype, TYPE_SIZE_UNIT (sizetype)); |
3265 | cookie_addr = build2 (POINTER_PLUS_EXPR, | |
726a989a RB |
3266 | size_ptr_type, |
3267 | fold_convert (size_ptr_type, base), | |
5be014d5 | 3268 | cookie_addr); |
5ade1ed2 | 3269 | maxindex = cp_build_indirect_ref (cookie_addr, NULL, tf_warning_or_error); |
8d08fdba | 3270 | } |
f30432d7 | 3271 | else if (TREE_CODE (type) == ARRAY_TYPE) |
8d08fdba | 3272 | { |
f4f206f4 KH |
3273 | /* Get the total number of things in the array, maxindex is a |
3274 | bad name. */ | |
f30432d7 | 3275 | maxindex = array_type_nelts_total (type); |
834c6dff | 3276 | type = strip_array_types (type); |
5ade1ed2 | 3277 | base = cp_build_unary_op (ADDR_EXPR, base, 1, tf_warning_or_error); |
6742d92b | 3278 | if (TREE_SIDE_EFFECTS (base)) |
49b7aacb JM |
3279 | { |
3280 | base_init = get_target_expr (base); | |
3281 | base = TARGET_EXPR_SLOT (base_init); | |
3282 | } | |
8d08fdba MS |
3283 | } |
3284 | else | |
3285 | { | |
9e9ff709 | 3286 | if (base != error_mark_node) |
8251199e | 3287 | error ("type to vector delete is neither pointer or array type"); |
8d08fdba MS |
3288 | return error_mark_node; |
3289 | } | |
8d08fdba | 3290 | |
49b7aacb | 3291 | rval = build_vec_delete_1 (base, maxindex, type, auto_delete_vec, |
f30432d7 | 3292 | use_global_delete); |
49b7aacb | 3293 | if (base_init) |
f293ce4b | 3294 | rval = build2 (COMPOUND_EXPR, TREE_TYPE (rval), base_init, rval); |
49b7aacb JM |
3295 | |
3296 | return rval; | |
8d08fdba | 3297 | } |