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8d08fdba | 1 | /* Handle initialization things in C++. |
d6a8bdff | 2 | Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
521cc508 | 3 | 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
8d08fdba MS |
4 | Contributed by Michael Tiemann (tiemann@cygnus.com) |
5 | ||
f5adbb8d | 6 | This file is part of GCC. |
8d08fdba | 7 | |
f5adbb8d | 8 | GCC is free software; you can redistribute it and/or modify |
8d08fdba MS |
9 | it under the terms of the GNU General Public License as published by |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
f5adbb8d | 13 | GCC is distributed in the hope that it will be useful, |
8d08fdba MS |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
f5adbb8d | 19 | along with GCC; see the file COPYING. If not, write to |
e9fa0c7c RK |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, |
21 | Boston, MA 02111-1307, USA. */ | |
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" |
8d08fdba | 37 | |
2a3398e1 NS |
38 | static bool begin_init_stmts (tree *, tree *); |
39 | static tree finish_init_stmts (bool, tree, tree); | |
2282d28d | 40 | static void construct_virtual_base (tree, tree); |
362efdc1 NN |
41 | static void expand_aggr_init_1 (tree, tree, tree, tree, int); |
42 | static void expand_default_init (tree, tree, tree, tree, int); | |
43 | static tree build_vec_delete_1 (tree, tree, tree, special_function_kind, int); | |
2282d28d | 44 | static void perform_member_init (tree, tree); |
362efdc1 NN |
45 | static tree build_builtin_delete_call (tree); |
46 | static int member_init_ok_or_else (tree, tree, tree); | |
47 | static void expand_virtual_init (tree, tree); | |
2282d28d | 48 | static tree sort_mem_initializers (tree, tree); |
362efdc1 NN |
49 | static tree initializing_context (tree); |
50 | static void expand_cleanup_for_base (tree, tree); | |
51 | static tree get_temp_regvar (tree, tree); | |
52 | static tree dfs_initialize_vtbl_ptrs (tree, void *); | |
53 | static tree build_default_init (tree, tree); | |
54 | static tree build_new_1 (tree); | |
55 | static tree get_cookie_size (tree); | |
56 | static tree build_dtor_call (tree, special_function_kind, int); | |
57 | static tree build_field_list (tree, tree, int *); | |
58 | static tree build_vtbl_address (tree); | |
8d08fdba | 59 | |
3dbc07b6 MM |
60 | /* We are about to generate some complex initialization code. |
61 | Conceptually, it is all a single expression. However, we may want | |
62 | to include conditionals, loops, and other such statement-level | |
63 | constructs. Therefore, we build the initialization code inside a | |
64 | statement-expression. This function starts such an expression. | |
65 | STMT_EXPR_P and COMPOUND_STMT_P are filled in by this function; | |
66 | pass them back to finish_init_stmts when the expression is | |
67 | complete. */ | |
68 | ||
2a3398e1 | 69 | static bool |
362efdc1 | 70 | begin_init_stmts (tree *stmt_expr_p, tree *compound_stmt_p) |
3dbc07b6 | 71 | { |
2a3398e1 | 72 | bool is_global = !building_stmt_tree (); |
35b1567d | 73 | |
2a3398e1 | 74 | *stmt_expr_p = begin_stmt_expr (); |
7a3397c7 | 75 | *compound_stmt_p = begin_compound_stmt (/*has_no_scope=*/true); |
2a3398e1 NS |
76 | |
77 | return is_global; | |
3dbc07b6 MM |
78 | } |
79 | ||
80 | /* Finish out the statement-expression begun by the previous call to | |
81 | begin_init_stmts. Returns the statement-expression itself. */ | |
82 | ||
2a3398e1 NS |
83 | static tree |
84 | finish_init_stmts (bool is_global, tree stmt_expr, tree compound_stmt) | |
35b1567d | 85 | { |
7a3397c7 | 86 | finish_compound_stmt (compound_stmt); |
35b1567d | 87 | |
303b7406 | 88 | stmt_expr = finish_stmt_expr (stmt_expr, true); |
3dbc07b6 | 89 | |
2a3398e1 NS |
90 | my_friendly_assert (!building_stmt_tree () == is_global, 20030726); |
91 | ||
3dbc07b6 MM |
92 | return stmt_expr; |
93 | } | |
94 | ||
95 | /* Constructors */ | |
96 | ||
338d90b8 NS |
97 | /* Called from initialize_vtbl_ptrs via dfs_walk. BINFO is the base |
98 | which we want to initialize the vtable pointer for, DATA is | |
99 | TREE_LIST whose TREE_VALUE is the this ptr expression. */ | |
7177d104 | 100 | |
d569399b | 101 | static tree |
362efdc1 | 102 | dfs_initialize_vtbl_ptrs (tree binfo, void *data) |
d569399b | 103 | { |
9965d119 | 104 | if ((!BINFO_PRIMARY_P (binfo) || TREE_VIA_VIRTUAL (binfo)) |
d569399b MM |
105 | && CLASSTYPE_VFIELDS (BINFO_TYPE (binfo))) |
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 | |
dbbf88d1 | 114 | BINFO_MARKED (binfo) = 1; |
d569399b MM |
115 | |
116 | return NULL_TREE; | |
117 | } | |
118 | ||
cf2e003b MM |
119 | /* Initialize all the vtable pointers in the object pointed to by |
120 | ADDR. */ | |
e92cc029 | 121 | |
8d08fdba | 122 | void |
362efdc1 | 123 | initialize_vtbl_ptrs (tree addr) |
8d08fdba | 124 | { |
cf2e003b MM |
125 | tree list; |
126 | tree type; | |
127 | ||
128 | type = TREE_TYPE (TREE_TYPE (addr)); | |
129 | list = build_tree_list (type, addr); | |
d569399b | 130 | |
bbd15aac | 131 | /* Walk through the hierarchy, initializing the vptr in each base |
1f5a253a | 132 | class. We do these in pre-order because we can't find the virtual |
3461fba7 NS |
133 | bases for a class until we've initialized the vtbl for that |
134 | class. */ | |
dbbf88d1 NS |
135 | dfs_walk_real (TYPE_BINFO (type), dfs_initialize_vtbl_ptrs, |
136 | NULL, unmarkedp, list); | |
137 | dfs_walk (TYPE_BINFO (type), dfs_unmark, markedp, type); | |
8d08fdba | 138 | } |
d569399b | 139 | |
17bbb839 MM |
140 | /* Return an expression for the zero-initialization of an object with |
141 | type T. This expression will either be a constant (in the case | |
142 | that T is a scalar), or a CONSTRUCTOR (in the case that T is an | |
143 | aggregate). In either case, the value can be used as DECL_INITIAL | |
144 | for a decl of the indicated TYPE; it is a valid static initializer. | |
1cb8292f MM |
145 | If NELTS is non-NULL, and TYPE is an ARRAY_TYPE, NELTS is the |
146 | number of elements in the array. If STATIC_STORAGE_P is TRUE, | |
147 | initializers are only generated for entities for which | |
148 | zero-initialization does not simply mean filling the storage with | |
149 | zero bytes. */ | |
94e6e4c4 AO |
150 | |
151 | tree | |
1cb8292f | 152 | build_zero_init (tree type, tree nelts, bool static_storage_p) |
94e6e4c4 | 153 | { |
17bbb839 MM |
154 | tree init = NULL_TREE; |
155 | ||
156 | /* [dcl.init] | |
157 | ||
158 | To zero-initialization storage for an object of type T means: | |
159 | ||
160 | -- if T is a scalar type, the storage is set to the value of zero | |
161 | converted to T. | |
162 | ||
163 | -- if T is a non-union class type, the storage for each nonstatic | |
164 | data member and each base-class subobject is zero-initialized. | |
165 | ||
166 | -- if T is a union type, the storage for its first data member is | |
167 | zero-initialized. | |
168 | ||
169 | -- if T is an array type, the storage for each element is | |
170 | zero-initialized. | |
171 | ||
172 | -- if T is a reference type, no initialization is performed. */ | |
94e6e4c4 | 173 | |
7a1d37e9 MA |
174 | my_friendly_assert (nelts == NULL_TREE || TREE_CODE (nelts) == INTEGER_CST, |
175 | 20030618); | |
176 | ||
17bbb839 MM |
177 | if (type == error_mark_node) |
178 | ; | |
179 | else if (static_storage_p && zero_init_p (type)) | |
180 | /* In order to save space, we do not explicitly build initializers | |
181 | for items that do not need them. GCC's semantics are that | |
182 | items with static storage duration that are not otherwise | |
183 | initialized are initialized to zero. */ | |
184 | ; | |
185 | else if (SCALAR_TYPE_P (type)) | |
186 | init = convert (type, integer_zero_node); | |
187 | else if (CLASS_TYPE_P (type)) | |
188 | { | |
189 | tree field; | |
190 | tree inits; | |
191 | ||
192 | /* Build a constructor to contain the initializations. */ | |
dcf92453 | 193 | init = build_constructor (type, NULL_TREE); |
17bbb839 MM |
194 | /* Iterate over the fields, building initializations. */ |
195 | inits = NULL_TREE; | |
196 | for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) | |
197 | { | |
198 | if (TREE_CODE (field) != FIELD_DECL) | |
199 | continue; | |
200 | ||
201 | /* Note that for class types there will be FIELD_DECLs | |
202 | corresponding to base classes as well. Thus, iterating | |
203 | over TYPE_FIELDs will result in correct initialization of | |
204 | all of the subobjects. */ | |
205 | if (static_storage_p && !zero_init_p (TREE_TYPE (field))) | |
206 | inits = tree_cons (field, | |
207 | build_zero_init (TREE_TYPE (field), | |
1cb8292f | 208 | /*nelts=*/NULL_TREE, |
17bbb839 MM |
209 | static_storage_p), |
210 | inits); | |
211 | ||
212 | /* For unions, only the first field is initialized. */ | |
213 | if (TREE_CODE (type) == UNION_TYPE) | |
214 | break; | |
215 | } | |
216 | CONSTRUCTOR_ELTS (init) = nreverse (inits); | |
217 | } | |
218 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
94e6e4c4 | 219 | { |
17bbb839 MM |
220 | tree index; |
221 | tree max_index; | |
222 | tree inits; | |
223 | ||
224 | /* Build a constructor to contain the initializations. */ | |
dcf92453 | 225 | init = build_constructor (type, NULL_TREE); |
17bbb839 MM |
226 | /* Iterate over the array elements, building initializations. */ |
227 | inits = NULL_TREE; | |
1cb8292f | 228 | max_index = nelts ? nelts : array_type_nelts (type); |
7a1d37e9 MA |
229 | my_friendly_assert (TREE_CODE (max_index) == INTEGER_CST, 20030618); |
230 | ||
a8e6c82a MM |
231 | /* A zero-sized array, which is accepted as an extension, will |
232 | have an upper bound of -1. */ | |
233 | if (!tree_int_cst_equal (max_index, integer_minus_one_node)) | |
234 | for (index = size_zero_node; | |
235 | !tree_int_cst_lt (max_index, index); | |
236 | index = size_binop (PLUS_EXPR, index, size_one_node)) | |
237 | inits = tree_cons (index, | |
238 | build_zero_init (TREE_TYPE (type), | |
239 | /*nelts=*/NULL_TREE, | |
240 | static_storage_p), | |
241 | inits); | |
17bbb839 | 242 | CONSTRUCTOR_ELTS (init) = nreverse (inits); |
94e6e4c4 AO |
243 | } |
244 | else if (TREE_CODE (type) == REFERENCE_TYPE) | |
17bbb839 | 245 | ; |
94e6e4c4 | 246 | else |
17bbb839 | 247 | abort (); |
94e6e4c4 | 248 | |
17bbb839 MM |
249 | /* In all cases, the initializer is a constant. */ |
250 | if (init) | |
251 | TREE_CONSTANT (init) = 1; | |
94e6e4c4 AO |
252 | |
253 | return init; | |
254 | } | |
255 | ||
1cb8292f MM |
256 | /* Build an expression for the default-initialization of an object of |
257 | the indicated TYPE. If NELTS is non-NULL, and TYPE is an | |
258 | ARRAY_TYPE, NELTS is the number of elements in the array. If | |
259 | initialization of TYPE requires calling constructors, this function | |
260 | returns NULL_TREE; the caller is responsible for arranging for the | |
261 | constructors to be called. */ | |
f30efcb7 | 262 | |
17bbb839 | 263 | static tree |
362efdc1 | 264 | build_default_init (tree type, tree nelts) |
17bbb839 MM |
265 | { |
266 | /* [dcl.init]: | |
f30efcb7 | 267 | |
17bbb839 | 268 | To default-initialize an object of type T means: |
f30efcb7 | 269 | |
17bbb839 MM |
270 | --if T is a non-POD class type (clause _class_), the default construc- |
271 | tor for T is called (and the initialization is ill-formed if T has | |
272 | no accessible default constructor); | |
f30efcb7 | 273 | |
17bbb839 | 274 | --if T is an array type, each element is default-initialized; |
f30efcb7 | 275 | |
17bbb839 | 276 | --otherwise, the storage for the object is zero-initialized. |
f30efcb7 | 277 | |
17bbb839 MM |
278 | A program that calls for default-initialization of an entity of refer- |
279 | ence type is ill-formed. */ | |
280 | ||
281 | /* If TYPE_NEEDS_CONSTRUCTING is true, the caller is responsible for | |
282 | performing the initialization. This is confusing in that some | |
283 | non-PODs do not have TYPE_NEEDS_CONSTRUCTING set. (For example, | |
284 | a class with a pointer-to-data member as a non-static data member | |
285 | does not have TYPE_NEEDS_CONSTRUCTING set.) Therefore, we end up | |
286 | passing non-PODs to build_zero_init below, which is contrary to | |
287 | the semantics quoted above from [dcl.init]. | |
288 | ||
289 | It happens, however, that the behavior of the constructor the | |
290 | standard says we should have generated would be precisely the | |
291 | same as that obtained by calling build_zero_init below, so things | |
292 | work out OK. */ | |
7a1d37e9 MA |
293 | if (TYPE_NEEDS_CONSTRUCTING (type) |
294 | || (nelts && TREE_CODE (nelts) != INTEGER_CST)) | |
f30efcb7 | 295 | return NULL_TREE; |
17bbb839 MM |
296 | |
297 | /* At this point, TYPE is either a POD class type, an array of POD | |
cd0be382 | 298 | classes, or something even more innocuous. */ |
1cb8292f | 299 | return build_zero_init (type, nelts, /*static_storage_p=*/false); |
f30efcb7 JM |
300 | } |
301 | ||
2282d28d MM |
302 | /* Initialize MEMBER, a FIELD_DECL, with INIT, a TREE_LIST of |
303 | arguments. If TREE_LIST is void_type_node, an empty initializer | |
304 | list was given; if NULL_TREE no initializer was given. */ | |
e92cc029 | 305 | |
8d08fdba | 306 | static void |
2282d28d | 307 | perform_member_init (tree member, tree init) |
8d08fdba MS |
308 | { |
309 | tree decl; | |
310 | tree type = TREE_TYPE (member); | |
2282d28d | 311 | bool explicit; |
eb66be0e | 312 | |
2282d28d MM |
313 | explicit = (init != NULL_TREE); |
314 | ||
315 | /* Effective C++ rule 12 requires that all data members be | |
316 | initialized. */ | |
317 | if (warn_ecpp && !explicit && TREE_CODE (type) != ARRAY_TYPE) | |
318 | warning ("`%D' should be initialized in the member initialization " | |
319 | "list", | |
320 | member); | |
321 | ||
322 | if (init == void_type_node) | |
323 | init = NULL_TREE; | |
324 | ||
325 | /* Get an lvalue for the data member. */ | |
50ad9642 MM |
326 | decl = build_class_member_access_expr (current_class_ref, member, |
327 | /*access_path=*/NULL_TREE, | |
328 | /*preserve_reference=*/true); | |
2fbfe9b8 MS |
329 | if (decl == error_mark_node) |
330 | return; | |
331 | ||
6bdb8141 JM |
332 | /* Deal with this here, as we will get confused if we try to call the |
333 | assignment op for an anonymous union. This can happen in a | |
334 | synthesized copy constructor. */ | |
335 | if (ANON_AGGR_TYPE_P (type)) | |
336 | { | |
ff9f1a5d MM |
337 | if (init) |
338 | { | |
339 | init = build (INIT_EXPR, type, decl, TREE_VALUE (init)); | |
340 | finish_expr_stmt (init); | |
341 | } | |
6bdb8141 | 342 | } |
92a62aad | 343 | else if (TYPE_NEEDS_CONSTRUCTING (type)) |
8d08fdba | 344 | { |
8d08fdba MS |
345 | if (explicit |
346 | && TREE_CODE (type) == ARRAY_TYPE | |
347 | && init != NULL_TREE | |
348 | && TREE_CHAIN (init) == NULL_TREE | |
349 | && TREE_CODE (TREE_TYPE (TREE_VALUE (init))) == ARRAY_TYPE) | |
350 | { | |
351 | /* Initialization of one array from another. */ | |
a48cccea JM |
352 | finish_expr_stmt (build_vec_init (decl, NULL_TREE, TREE_VALUE (init), |
353 | /* from_array=*/1)); | |
8d08fdba MS |
354 | } |
355 | else | |
f1dedc31 | 356 | finish_expr_stmt (build_aggr_init (decl, init, 0)); |
8d08fdba MS |
357 | } |
358 | else | |
359 | { | |
360 | if (init == NULL_TREE) | |
361 | { | |
362 | if (explicit) | |
363 | { | |
1cb8292f | 364 | init = build_default_init (type, /*nelts=*/NULL_TREE); |
f30efcb7 | 365 | if (TREE_CODE (type) == REFERENCE_TYPE) |
33bd39a2 | 366 | warning |
f30efcb7 JM |
367 | ("default-initialization of `%#D', which has reference type", |
368 | member); | |
8d08fdba MS |
369 | } |
370 | /* member traversal: note it leaves init NULL */ | |
f30efcb7 | 371 | else if (TREE_CODE (type) == REFERENCE_TYPE) |
33bd39a2 | 372 | pedwarn ("uninitialized reference member `%D'", member); |
58ec3cc5 | 373 | else if (CP_TYPE_CONST_P (type)) |
f3dfc177 | 374 | pedwarn ("uninitialized member `%D' with `const' type `%T'", |
58ec3cc5 | 375 | member, type); |
8d08fdba MS |
376 | } |
377 | else if (TREE_CODE (init) == TREE_LIST) | |
c7b62f14 NS |
378 | /* There was an explicit member initialization. Do some work |
379 | in that case. */ | |
380 | init = build_x_compound_expr_from_list (init, "member initializer"); | |
8d08fdba | 381 | |
4f0aa416 | 382 | if (init) |
f1dedc31 | 383 | finish_expr_stmt (build_modify_expr (decl, INIT_EXPR, init)); |
8d08fdba | 384 | } |
eb66be0e | 385 | |
834c6dff | 386 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)) |
b7484fbe | 387 | { |
de22184b MS |
388 | tree expr; |
389 | ||
50ad9642 MM |
390 | expr = build_class_member_access_expr (current_class_ref, member, |
391 | /*access_path=*/NULL_TREE, | |
392 | /*preserve_reference=*/false); | |
3ec6bad3 | 393 | expr = build_delete (type, expr, sfk_complete_destructor, |
b7484fbe MS |
394 | LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); |
395 | ||
396 | if (expr != error_mark_node) | |
659e5a7a | 397 | finish_eh_cleanup (expr); |
b7484fbe | 398 | } |
8d08fdba MS |
399 | } |
400 | ||
ff9f1a5d MM |
401 | /* Returns a TREE_LIST containing (as the TREE_PURPOSE of each node) all |
402 | the FIELD_DECLs on the TYPE_FIELDS list for T, in reverse order. */ | |
403 | ||
404 | static tree | |
362efdc1 | 405 | build_field_list (tree t, tree list, int *uses_unions_p) |
ff9f1a5d MM |
406 | { |
407 | tree fields; | |
408 | ||
01c3fb15 JM |
409 | *uses_unions_p = 0; |
410 | ||
ff9f1a5d MM |
411 | /* Note whether or not T is a union. */ |
412 | if (TREE_CODE (t) == UNION_TYPE) | |
413 | *uses_unions_p = 1; | |
414 | ||
415 | for (fields = TYPE_FIELDS (t); fields; fields = TREE_CHAIN (fields)) | |
416 | { | |
417 | /* Skip CONST_DECLs for enumeration constants and so forth. */ | |
17bbb839 | 418 | if (TREE_CODE (fields) != FIELD_DECL || DECL_ARTIFICIAL (fields)) |
ff9f1a5d MM |
419 | continue; |
420 | ||
421 | /* Keep track of whether or not any fields are unions. */ | |
422 | if (TREE_CODE (TREE_TYPE (fields)) == UNION_TYPE) | |
423 | *uses_unions_p = 1; | |
424 | ||
425 | /* For an anonymous struct or union, we must recursively | |
426 | consider the fields of the anonymous type. They can be | |
427 | directly initialized from the constructor. */ | |
428 | if (ANON_AGGR_TYPE_P (TREE_TYPE (fields))) | |
429 | { | |
430 | /* Add this field itself. Synthesized copy constructors | |
431 | initialize the entire aggregate. */ | |
432 | list = tree_cons (fields, NULL_TREE, list); | |
433 | /* And now add the fields in the anonymous aggregate. */ | |
434 | list = build_field_list (TREE_TYPE (fields), list, | |
435 | uses_unions_p); | |
436 | } | |
437 | /* Add this field. */ | |
438 | else if (DECL_NAME (fields)) | |
439 | list = tree_cons (fields, NULL_TREE, list); | |
440 | } | |
441 | ||
442 | return list; | |
443 | } | |
444 | ||
2282d28d MM |
445 | /* The MEM_INITS are a TREE_LIST. The TREE_PURPOSE of each list gives |
446 | a FIELD_DECL or BINFO in T that needs initialization. The | |
447 | TREE_VALUE gives the initializer, or list of initializer arguments. | |
448 | ||
449 | Return a TREE_LIST containing all of the initializations required | |
450 | for T, in the order in which they should be performed. The output | |
451 | list has the same format as the input. */ | |
e92cc029 | 452 | |
8d08fdba | 453 | static tree |
2282d28d | 454 | sort_mem_initializers (tree t, tree mem_inits) |
8d08fdba | 455 | { |
ff9f1a5d | 456 | tree init; |
2282d28d MM |
457 | tree base; |
458 | tree sorted_inits; | |
459 | tree next_subobject; | |
460 | int i; | |
ff9f1a5d MM |
461 | int uses_unions_p; |
462 | ||
2282d28d MM |
463 | /* Build up a list of initializations. The TREE_PURPOSE of entry |
464 | will be the subobject (a FIELD_DECL or BINFO) to initialize. The | |
465 | TREE_VALUE will be the constructor arguments, or NULL if no | |
466 | explicit initialization was provided. */ | |
467 | sorted_inits = NULL_TREE; | |
468 | /* Process the virtual bases. */ | |
469 | for (base = CLASSTYPE_VBASECLASSES (t); base; base = TREE_CHAIN (base)) | |
470 | sorted_inits = tree_cons (TREE_VALUE (base), NULL_TREE, sorted_inits); | |
471 | /* Process the direct bases. */ | |
472 | for (i = 0; i < CLASSTYPE_N_BASECLASSES (t); ++i) | |
8d08fdba | 473 | { |
2282d28d MM |
474 | base = BINFO_BASETYPE (TYPE_BINFO (t), i); |
475 | if (!TREE_VIA_VIRTUAL (base)) | |
476 | sorted_inits = tree_cons (base, NULL_TREE, sorted_inits); | |
477 | } | |
478 | /* Process the non-static data members. */ | |
479 | sorted_inits = build_field_list (t, sorted_inits, &uses_unions_p); | |
480 | /* Reverse the entire list of initializations, so that they are in | |
481 | the order that they will actually be performed. */ | |
482 | sorted_inits = nreverse (sorted_inits); | |
483 | ||
484 | /* If the user presented the initializers in an order different from | |
485 | that in which they will actually occur, we issue a warning. Keep | |
486 | track of the next subobject which can be explicitly initialized | |
487 | without issuing a warning. */ | |
488 | next_subobject = sorted_inits; | |
489 | ||
490 | /* Go through the explicit initializers, filling in TREE_PURPOSE in | |
491 | the SORTED_INITS. */ | |
492 | for (init = mem_inits; init; init = TREE_CHAIN (init)) | |
493 | { | |
494 | tree subobject; | |
495 | tree subobject_init; | |
496 | ||
497 | subobject = TREE_PURPOSE (init); | |
498 | ||
499 | /* If the explicit initializers are in sorted order, then | |
500 | SUBOBJECT will be NEXT_SUBOBJECT, or something following | |
501 | it. */ | |
502 | for (subobject_init = next_subobject; | |
503 | subobject_init; | |
504 | subobject_init = TREE_CHAIN (subobject_init)) | |
505 | if (TREE_PURPOSE (subobject_init) == subobject) | |
ff9f1a5d MM |
506 | break; |
507 | ||
2282d28d MM |
508 | /* Issue a warning if the explicit initializer order does not |
509 | match that which will actually occur. */ | |
510 | if (warn_reorder && !subobject_init) | |
ff9f1a5d | 511 | { |
2282d28d MM |
512 | if (TREE_CODE (TREE_PURPOSE (next_subobject)) == FIELD_DECL) |
513 | cp_warning_at ("`%D' will be initialized after", | |
514 | TREE_PURPOSE (next_subobject)); | |
515 | else | |
516 | warning ("base `%T' will be initialized after", | |
517 | TREE_PURPOSE (next_subobject)); | |
518 | if (TREE_CODE (subobject) == FIELD_DECL) | |
519 | cp_warning_at (" `%#D'", subobject); | |
520 | else | |
521 | warning (" base `%T'", subobject); | |
d9dd2c4e | 522 | warning (" when initialized here"); |
ff9f1a5d | 523 | } |
b7484fbe | 524 | |
2282d28d MM |
525 | /* Look again, from the beginning of the list. */ |
526 | if (!subobject_init) | |
ff9f1a5d | 527 | { |
2282d28d MM |
528 | subobject_init = sorted_inits; |
529 | while (TREE_PURPOSE (subobject_init) != subobject) | |
530 | subobject_init = TREE_CHAIN (subobject_init); | |
ff9f1a5d | 531 | } |
2282d28d MM |
532 | |
533 | /* It is invalid to initialize the same subobject more than | |
534 | once. */ | |
535 | if (TREE_VALUE (subobject_init)) | |
ff9f1a5d | 536 | { |
2282d28d MM |
537 | if (TREE_CODE (subobject) == FIELD_DECL) |
538 | error ("multiple initializations given for `%D'", subobject); | |
539 | else | |
540 | error ("multiple initializations given for base `%T'", | |
541 | subobject); | |
ff9f1a5d MM |
542 | } |
543 | ||
2282d28d MM |
544 | /* Record the initialization. */ |
545 | TREE_VALUE (subobject_init) = TREE_VALUE (init); | |
546 | next_subobject = subobject_init; | |
ff9f1a5d MM |
547 | } |
548 | ||
549 | /* [class.base.init] | |
b7484fbe | 550 | |
ff9f1a5d MM |
551 | If a ctor-initializer specifies more than one mem-initializer for |
552 | multiple members of the same union (including members of | |
553 | anonymous unions), the ctor-initializer is ill-formed. */ | |
554 | if (uses_unions_p) | |
555 | { | |
2282d28d MM |
556 | tree last_field = NULL_TREE; |
557 | for (init = sorted_inits; init; init = TREE_CHAIN (init)) | |
8d08fdba | 558 | { |
ff9f1a5d MM |
559 | tree field; |
560 | tree field_type; | |
561 | int done; | |
562 | ||
2282d28d MM |
563 | /* Skip uninitialized members and base classes. */ |
564 | if (!TREE_VALUE (init) | |
565 | || TREE_CODE (TREE_PURPOSE (init)) != FIELD_DECL) | |
ff9f1a5d MM |
566 | continue; |
567 | /* See if this field is a member of a union, or a member of a | |
568 | structure contained in a union, etc. */ | |
569 | field = TREE_PURPOSE (init); | |
570 | for (field_type = DECL_CONTEXT (field); | |
571 | !same_type_p (field_type, t); | |
572 | field_type = TYPE_CONTEXT (field_type)) | |
573 | if (TREE_CODE (field_type) == UNION_TYPE) | |
574 | break; | |
575 | /* If this field is not a member of a union, skip it. */ | |
576 | if (TREE_CODE (field_type) != UNION_TYPE) | |
8d08fdba | 577 | continue; |
8d08fdba | 578 | |
ff9f1a5d MM |
579 | /* It's only an error if we have two initializers for the same |
580 | union type. */ | |
581 | if (!last_field) | |
6bdb8141 | 582 | { |
ff9f1a5d MM |
583 | last_field = field; |
584 | continue; | |
6bdb8141 | 585 | } |
8d08fdba | 586 | |
ff9f1a5d MM |
587 | /* See if LAST_FIELD and the field initialized by INIT are |
588 | members of the same union. If so, there's a problem, | |
589 | unless they're actually members of the same structure | |
590 | which is itself a member of a union. For example, given: | |
8d08fdba | 591 | |
ff9f1a5d MM |
592 | union { struct { int i; int j; }; }; |
593 | ||
594 | initializing both `i' and `j' makes sense. */ | |
595 | field_type = DECL_CONTEXT (field); | |
596 | done = 0; | |
597 | do | |
8d08fdba | 598 | { |
ff9f1a5d MM |
599 | tree last_field_type; |
600 | ||
601 | last_field_type = DECL_CONTEXT (last_field); | |
602 | while (1) | |
00595019 | 603 | { |
ff9f1a5d | 604 | if (same_type_p (last_field_type, field_type)) |
00595019 | 605 | { |
ff9f1a5d | 606 | if (TREE_CODE (field_type) == UNION_TYPE) |
33bd39a2 | 607 | error ("initializations for multiple members of `%T'", |
ff9f1a5d MM |
608 | last_field_type); |
609 | done = 1; | |
610 | break; | |
00595019 | 611 | } |
8d08fdba | 612 | |
ff9f1a5d MM |
613 | if (same_type_p (last_field_type, t)) |
614 | break; | |
8d08fdba | 615 | |
ff9f1a5d MM |
616 | last_field_type = TYPE_CONTEXT (last_field_type); |
617 | } | |
618 | ||
619 | /* If we've reached the outermost class, then we're | |
620 | done. */ | |
621 | if (same_type_p (field_type, t)) | |
622 | break; | |
8d08fdba | 623 | |
ff9f1a5d | 624 | field_type = TYPE_CONTEXT (field_type); |
8d08fdba | 625 | } |
ff9f1a5d MM |
626 | while (!done); |
627 | ||
628 | last_field = field; | |
b7484fbe MS |
629 | } |
630 | } | |
8d08fdba | 631 | |
2282d28d | 632 | return sorted_inits; |
b7484fbe MS |
633 | } |
634 | ||
2282d28d MM |
635 | /* Initialize all bases and members of CURRENT_CLASS_TYPE. MEM_INITS |
636 | is a TREE_LIST giving the explicit mem-initializer-list for the | |
637 | constructor. The TREE_PURPOSE of each entry is a subobject (a | |
638 | FIELD_DECL or a BINFO) of the CURRENT_CLASS_TYPE. The TREE_VALUE | |
639 | is a TREE_LIST giving the arguments to the constructor or | |
640 | void_type_node for an empty list of arguments. */ | |
a9aedbc2 | 641 | |
3dbc07b6 | 642 | void |
2282d28d | 643 | emit_mem_initializers (tree mem_inits) |
8d08fdba | 644 | { |
2282d28d MM |
645 | /* Sort the mem-initializers into the order in which the |
646 | initializations should be performed. */ | |
647 | mem_inits = sort_mem_initializers (current_class_type, mem_inits); | |
8d08fdba | 648 | |
1f5a253a NS |
649 | in_base_initializer = 1; |
650 | ||
2282d28d MM |
651 | /* Initialize base classes. */ |
652 | while (mem_inits | |
653 | && TREE_CODE (TREE_PURPOSE (mem_inits)) != FIELD_DECL) | |
8d08fdba | 654 | { |
2282d28d MM |
655 | tree subobject = TREE_PURPOSE (mem_inits); |
656 | tree arguments = TREE_VALUE (mem_inits); | |
657 | ||
658 | /* If these initializations are taking place in a copy | |
659 | constructor, the base class should probably be explicitly | |
660 | initialized. */ | |
661 | if (extra_warnings && !arguments | |
662 | && DECL_COPY_CONSTRUCTOR_P (current_function_decl) | |
663 | && TYPE_NEEDS_CONSTRUCTING (BINFO_TYPE (subobject))) | |
664 | warning ("base class `%#T' should be explicitly initialized in the " | |
665 | "copy constructor", | |
666 | BINFO_TYPE (subobject)); | |
667 | ||
668 | /* If an explicit -- but empty -- initializer list was present, | |
669 | treat it just like default initialization at this point. */ | |
670 | if (arguments == void_type_node) | |
671 | arguments = NULL_TREE; | |
672 | ||
673 | /* Initialize the base. */ | |
674 | if (TREE_VIA_VIRTUAL (subobject)) | |
675 | construct_virtual_base (subobject, arguments); | |
676 | else | |
b7484fbe | 677 | { |
2282d28d MM |
678 | tree base_addr; |
679 | ||
680 | base_addr = build_base_path (PLUS_EXPR, current_class_ptr, | |
681 | subobject, 1); | |
682 | expand_aggr_init_1 (subobject, NULL_TREE, | |
683 | build_indirect_ref (base_addr, NULL), | |
684 | arguments, | |
b370501f | 685 | LOOKUP_NORMAL); |
2282d28d | 686 | expand_cleanup_for_base (subobject, NULL_TREE); |
8d08fdba | 687 | } |
8d08fdba | 688 | |
2282d28d | 689 | mem_inits = TREE_CHAIN (mem_inits); |
8d08fdba | 690 | } |
1f5a253a | 691 | in_base_initializer = 0; |
8d08fdba | 692 | |
2282d28d | 693 | /* Initialize the vptrs. */ |
cf2e003b | 694 | initialize_vtbl_ptrs (current_class_ptr); |
1f5a253a | 695 | |
2282d28d MM |
696 | /* Initialize the data members. */ |
697 | while (mem_inits) | |
8d08fdba | 698 | { |
2282d28d MM |
699 | perform_member_init (TREE_PURPOSE (mem_inits), |
700 | TREE_VALUE (mem_inits)); | |
701 | mem_inits = TREE_CHAIN (mem_inits); | |
b7484fbe | 702 | } |
8d08fdba MS |
703 | } |
704 | ||
3ec6bad3 MM |
705 | /* Returns the address of the vtable (i.e., the value that should be |
706 | assigned to the vptr) for BINFO. */ | |
707 | ||
708 | static tree | |
362efdc1 | 709 | build_vtbl_address (tree binfo) |
3ec6bad3 | 710 | { |
9965d119 | 711 | tree binfo_for = binfo; |
3ec6bad3 MM |
712 | tree vtbl; |
713 | ||
9965d119 NS |
714 | if (BINFO_VPTR_INDEX (binfo) && TREE_VIA_VIRTUAL (binfo) |
715 | && BINFO_PRIMARY_P (binfo)) | |
716 | /* If this is a virtual primary base, then the vtable we want to store | |
717 | is that for the base this is being used as the primary base of. We | |
718 | can't simply skip the initialization, because we may be expanding the | |
719 | inits of a subobject constructor where the virtual base layout | |
720 | can be different. */ | |
721 | while (BINFO_PRIMARY_BASE_OF (binfo_for)) | |
722 | binfo_for = BINFO_PRIMARY_BASE_OF (binfo_for); | |
723 | ||
3ec6bad3 MM |
724 | /* Figure out what vtable BINFO's vtable is based on, and mark it as |
725 | used. */ | |
9965d119 | 726 | vtbl = get_vtbl_decl_for_binfo (binfo_for); |
3ec6bad3 MM |
727 | assemble_external (vtbl); |
728 | TREE_USED (vtbl) = 1; | |
729 | ||
730 | /* Now compute the address to use when initializing the vptr. */ | |
9965d119 | 731 | vtbl = BINFO_VTABLE (binfo_for); |
3ec6bad3 MM |
732 | if (TREE_CODE (vtbl) == VAR_DECL) |
733 | { | |
734 | vtbl = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (vtbl)), vtbl); | |
735 | TREE_CONSTANT (vtbl) = 1; | |
736 | } | |
737 | ||
738 | return vtbl; | |
739 | } | |
740 | ||
8d08fdba MS |
741 | /* This code sets up the virtual function tables appropriate for |
742 | the pointer DECL. It is a one-ply initialization. | |
743 | ||
744 | BINFO is the exact type that DECL is supposed to be. In | |
745 | multiple inheritance, this might mean "C's A" if C : A, B. */ | |
e92cc029 | 746 | |
8926095f | 747 | static void |
362efdc1 | 748 | expand_virtual_init (tree binfo, tree decl) |
8d08fdba | 749 | { |
8d08fdba | 750 | tree vtbl, vtbl_ptr; |
3ec6bad3 | 751 | tree vtt_index; |
8d08fdba | 752 | |
3ec6bad3 MM |
753 | /* Compute the initializer for vptr. */ |
754 | vtbl = build_vtbl_address (binfo); | |
755 | ||
3461fba7 NS |
756 | /* We may get this vptr from a VTT, if this is a subobject |
757 | constructor or subobject destructor. */ | |
3ec6bad3 MM |
758 | vtt_index = BINFO_VPTR_INDEX (binfo); |
759 | if (vtt_index) | |
760 | { | |
761 | tree vtbl2; | |
762 | tree vtt_parm; | |
763 | ||
764 | /* Compute the value to use, when there's a VTT. */ | |
e0fff4b3 | 765 | vtt_parm = current_vtt_parm; |
3ec6bad3 MM |
766 | vtbl2 = build (PLUS_EXPR, |
767 | TREE_TYPE (vtt_parm), | |
768 | vtt_parm, | |
769 | vtt_index); | |
770 | vtbl2 = build1 (INDIRECT_REF, TREE_TYPE (vtbl), vtbl2); | |
771 | ||
772 | /* The actual initializer is the VTT value only in the subobject | |
773 | constructor. In maybe_clone_body we'll substitute NULL for | |
774 | the vtt_parm in the case of the non-subobject constructor. */ | |
775 | vtbl = build (COND_EXPR, | |
776 | TREE_TYPE (vtbl), | |
48f22ed2 JM |
777 | build (EQ_EXPR, boolean_type_node, |
778 | current_in_charge_parm, integer_zero_node), | |
3ec6bad3 MM |
779 | vtbl2, |
780 | vtbl); | |
781 | } | |
70ae3201 MM |
782 | |
783 | /* Compute the location of the vtpr. */ | |
338d90b8 NS |
784 | vtbl_ptr = build_vfield_ref (build_indirect_ref (decl, NULL), |
785 | TREE_TYPE (binfo)); | |
786 | my_friendly_assert (vtbl_ptr != error_mark_node, 20010730); | |
8d08fdba | 787 | |
70ae3201 | 788 | /* Assign the vtable to the vptr. */ |
6060a796 | 789 | vtbl = convert_force (TREE_TYPE (vtbl_ptr), vtbl, 0); |
f1dedc31 | 790 | finish_expr_stmt (build_modify_expr (vtbl_ptr, NOP_EXPR, vtbl)); |
8d08fdba MS |
791 | } |
792 | ||
f33e32a8 MM |
793 | /* If an exception is thrown in a constructor, those base classes already |
794 | constructed must be destroyed. This function creates the cleanup | |
0b8a1e58 | 795 | for BINFO, which has just been constructed. If FLAG is non-NULL, |
838dfd8a | 796 | it is a DECL which is nonzero when this base needs to be |
0b8a1e58 | 797 | destroyed. */ |
f33e32a8 MM |
798 | |
799 | static void | |
362efdc1 | 800 | expand_cleanup_for_base (tree binfo, tree flag) |
f33e32a8 MM |
801 | { |
802 | tree expr; | |
803 | ||
834c6dff | 804 | if (TYPE_HAS_TRIVIAL_DESTRUCTOR (BINFO_TYPE (binfo))) |
f33e32a8 MM |
805 | return; |
806 | ||
0b8a1e58 | 807 | /* Call the destructor. */ |
4ba126e4 MM |
808 | expr = build_special_member_call (current_class_ref, |
809 | base_dtor_identifier, | |
810 | NULL_TREE, | |
811 | binfo, | |
812 | LOOKUP_NORMAL | LOOKUP_NONVIRTUAL); | |
0b8a1e58 MM |
813 | if (flag) |
814 | expr = fold (build (COND_EXPR, void_type_node, | |
78ef5b89 | 815 | c_common_truthvalue_conversion (flag), |
0b8a1e58 MM |
816 | expr, integer_zero_node)); |
817 | ||
659e5a7a | 818 | finish_eh_cleanup (expr); |
f33e32a8 MM |
819 | } |
820 | ||
2282d28d MM |
821 | /* Construct the virtual base-class VBASE passing the ARGUMENTS to its |
822 | constructor. */ | |
e92cc029 | 823 | |
8d08fdba | 824 | static void |
2282d28d | 825 | construct_virtual_base (tree vbase, tree arguments) |
8d08fdba | 826 | { |
2282d28d MM |
827 | tree inner_if_stmt; |
828 | tree compound_stmt; | |
829 | tree exp; | |
830 | tree flag; | |
831 | ||
832 | /* If there are virtual base classes with destructors, we need to | |
833 | emit cleanups to destroy them if an exception is thrown during | |
834 | the construction process. These exception regions (i.e., the | |
835 | period during which the cleanups must occur) begin from the time | |
836 | the construction is complete to the end of the function. If we | |
837 | create a conditional block in which to initialize the | |
838 | base-classes, then the cleanup region for the virtual base begins | |
839 | inside a block, and ends outside of that block. This situation | |
840 | confuses the sjlj exception-handling code. Therefore, we do not | |
841 | create a single conditional block, but one for each | |
842 | initialization. (That way the cleanup regions always begin | |
843 | in the outer block.) We trust the back-end to figure out | |
844 | that the FLAG will not change across initializations, and | |
845 | avoid doing multiple tests. */ | |
846 | flag = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); | |
847 | inner_if_stmt = begin_if_stmt (); | |
848 | finish_if_stmt_cond (flag, inner_if_stmt); | |
7a3397c7 | 849 | compound_stmt = begin_compound_stmt (/*has_no_scope=*/true); |
2282d28d MM |
850 | |
851 | /* Compute the location of the virtual base. If we're | |
852 | constructing virtual bases, then we must be the most derived | |
853 | class. Therefore, we don't have to look up the virtual base; | |
854 | we already know where it is. */ | |
22ed7e5f MM |
855 | exp = convert_to_base_statically (current_class_ref, vbase); |
856 | ||
857 | expand_aggr_init_1 (vbase, current_class_ref, exp, arguments, | |
858 | LOOKUP_COMPLAIN); | |
7a3397c7 | 859 | finish_compound_stmt (compound_stmt); |
2282d28d MM |
860 | finish_then_clause (inner_if_stmt); |
861 | finish_if_stmt (); | |
862 | ||
863 | expand_cleanup_for_base (vbase, flag); | |
8d08fdba MS |
864 | } |
865 | ||
2ee887f2 | 866 | /* Find the context in which this FIELD can be initialized. */ |
e92cc029 | 867 | |
2ee887f2 | 868 | static tree |
362efdc1 | 869 | initializing_context (tree field) |
2ee887f2 MS |
870 | { |
871 | tree t = DECL_CONTEXT (field); | |
872 | ||
873 | /* Anonymous union members can be initialized in the first enclosing | |
874 | non-anonymous union context. */ | |
6bdb8141 | 875 | while (t && ANON_AGGR_TYPE_P (t)) |
2ee887f2 MS |
876 | t = TYPE_CONTEXT (t); |
877 | return t; | |
878 | } | |
879 | ||
8d08fdba MS |
880 | /* Function to give error message if member initialization specification |
881 | is erroneous. FIELD is the member we decided to initialize. | |
882 | TYPE is the type for which the initialization is being performed. | |
72b7eeff | 883 | FIELD must be a member of TYPE. |
8d08fdba MS |
884 | |
885 | MEMBER_NAME is the name of the member. */ | |
886 | ||
887 | static int | |
362efdc1 | 888 | member_init_ok_or_else (tree field, tree type, tree member_name) |
8d08fdba MS |
889 | { |
890 | if (field == error_mark_node) | |
891 | return 0; | |
a723baf1 | 892 | if (!field) |
8d08fdba | 893 | { |
33bd39a2 | 894 | error ("class `%T' does not have any field named `%D'", type, |
a723baf1 | 895 | member_name); |
8d08fdba MS |
896 | return 0; |
897 | } | |
a723baf1 | 898 | if (TREE_CODE (field) == VAR_DECL) |
b7484fbe | 899 | { |
a723baf1 MM |
900 | error ("`%#D' is a static data member; it can only be " |
901 | "initialized at its definition", | |
902 | field); | |
903 | return 0; | |
904 | } | |
905 | if (TREE_CODE (field) != FIELD_DECL) | |
906 | { | |
907 | error ("`%#D' is not a non-static data member of `%T'", | |
908 | field, type); | |
909 | return 0; | |
910 | } | |
911 | if (initializing_context (field) != type) | |
912 | { | |
913 | error ("class `%T' does not have any field named `%D'", type, | |
914 | member_name); | |
b7484fbe MS |
915 | return 0; |
916 | } | |
917 | ||
8d08fdba MS |
918 | return 1; |
919 | } | |
920 | ||
2282d28d MM |
921 | /* NAME is a FIELD_DECL, an IDENTIFIER_NODE which names a field, or it |
922 | is a _TYPE node or TYPE_DECL which names a base for that type. | |
1f5a253a NS |
923 | Check the validity of NAME, and return either the base _TYPE, base |
924 | binfo, or the FIELD_DECL of the member. If NAME is invalid, return | |
2282d28d | 925 | NULL_TREE and issue a diagnostic. |
8d08fdba | 926 | |
36a68fe7 NS |
927 | An old style unnamed direct single base construction is permitted, |
928 | where NAME is NULL. */ | |
8d08fdba | 929 | |
fd74ca0b | 930 | tree |
1f5a253a | 931 | expand_member_init (tree name) |
8d08fdba | 932 | { |
2282d28d MM |
933 | tree basetype; |
934 | tree field; | |
8d08fdba | 935 | |
2282d28d | 936 | if (!current_class_ref) |
fd74ca0b | 937 | return NULL_TREE; |
8d08fdba | 938 | |
36a68fe7 | 939 | if (!name) |
90418208 | 940 | { |
36a68fe7 NS |
941 | /* This is an obsolete unnamed base class initializer. The |
942 | parser will already have warned about its use. */ | |
2282d28d | 943 | switch (CLASSTYPE_N_BASECLASSES (current_class_type)) |
36a68fe7 NS |
944 | { |
945 | case 0: | |
33bd39a2 | 946 | error ("unnamed initializer for `%T', which has no base classes", |
2282d28d | 947 | current_class_type); |
36a68fe7 NS |
948 | return NULL_TREE; |
949 | case 1: | |
2282d28d | 950 | basetype = TYPE_BINFO_BASETYPE (current_class_type, 0); |
36a68fe7 NS |
951 | break; |
952 | default: | |
33bd39a2 | 953 | error ("unnamed initializer for `%T', which uses multiple inheritance", |
2282d28d | 954 | current_class_type); |
36a68fe7 NS |
955 | return NULL_TREE; |
956 | } | |
90418208 | 957 | } |
36a68fe7 | 958 | else if (TYPE_P (name)) |
be99da77 | 959 | { |
a82d6da5 | 960 | basetype = TYPE_MAIN_VARIANT (name); |
36a68fe7 | 961 | name = TYPE_NAME (name); |
be99da77 | 962 | } |
36a68fe7 NS |
963 | else if (TREE_CODE (name) == TYPE_DECL) |
964 | basetype = TYPE_MAIN_VARIANT (TREE_TYPE (name)); | |
2282d28d MM |
965 | else |
966 | basetype = NULL_TREE; | |
8d08fdba | 967 | |
36a68fe7 | 968 | if (basetype) |
41efda8f | 969 | { |
d9148cf4 MM |
970 | tree class_binfo; |
971 | tree direct_binfo; | |
972 | tree virtual_binfo; | |
973 | int i; | |
2282d28d | 974 | |
36a68fe7 | 975 | if (current_template_parms) |
1f5a253a | 976 | return basetype; |
2282d28d | 977 | |
d9148cf4 MM |
978 | class_binfo = TYPE_BINFO (current_class_type); |
979 | direct_binfo = NULL_TREE; | |
980 | virtual_binfo = NULL_TREE; | |
981 | ||
982 | /* Look for a direct base. */ | |
983 | for (i = 0; i < BINFO_N_BASETYPES (class_binfo); ++i) | |
984 | if (same_type_p (basetype, | |
985 | TYPE_BINFO_BASETYPE (current_class_type, i))) | |
986 | { | |
987 | direct_binfo = BINFO_BASETYPE (class_binfo, i); | |
988 | break; | |
989 | } | |
990 | /* Look for a virtual base -- unless the direct base is itself | |
991 | virtual. */ | |
992 | if (!direct_binfo || !TREE_VIA_VIRTUAL (direct_binfo)) | |
993 | { | |
994 | virtual_binfo | |
995 | = purpose_member (basetype, | |
996 | CLASSTYPE_VBASECLASSES (current_class_type)); | |
997 | if (virtual_binfo) | |
998 | virtual_binfo = TREE_VALUE (virtual_binfo); | |
999 | } | |
1000 | ||
1001 | /* [class.base.init] | |
1002 | ||
1003 | If a mem-initializer-id is ambiguous because it designates | |
1004 | both a direct non-virtual base class and an inherited virtual | |
1005 | base class, the mem-initializer is ill-formed. */ | |
1006 | if (direct_binfo && virtual_binfo) | |
1007 | { | |
1008 | error ("'%D' is both a direct base and an indirect virtual base", | |
1009 | basetype); | |
1010 | return NULL_TREE; | |
1011 | } | |
1012 | ||
1013 | if (!direct_binfo && !virtual_binfo) | |
8d08fdba | 1014 | { |
2282d28d | 1015 | if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)) |
33bd39a2 | 1016 | error ("type `%D' is not a direct or virtual base of `%T'", |
2282d28d | 1017 | name, current_class_type); |
41efda8f | 1018 | else |
33bd39a2 | 1019 | error ("type `%D' is not a direct base of `%T'", |
2282d28d | 1020 | name, current_class_type); |
fd74ca0b | 1021 | return NULL_TREE; |
41efda8f | 1022 | } |
d9148cf4 MM |
1023 | |
1024 | return direct_binfo ? direct_binfo : virtual_binfo; | |
41efda8f MM |
1025 | } |
1026 | else | |
1027 | { | |
2282d28d | 1028 | if (TREE_CODE (name) == IDENTIFIER_NODE) |
86ac0575 | 1029 | field = lookup_field (current_class_type, name, 1, false); |
2282d28d MM |
1030 | else |
1031 | field = name; | |
8d08fdba | 1032 | |
2282d28d | 1033 | if (member_init_ok_or_else (field, current_class_type, name)) |
1f5a253a | 1034 | return field; |
41efda8f | 1035 | } |
fd74ca0b | 1036 | |
2282d28d | 1037 | return NULL_TREE; |
8d08fdba MS |
1038 | } |
1039 | ||
1040 | /* This is like `expand_member_init', only it stores one aggregate | |
1041 | value into another. | |
1042 | ||
1043 | INIT comes in two flavors: it is either a value which | |
1044 | is to be stored in EXP, or it is a parameter list | |
1045 | to go to a constructor, which will operate on EXP. | |
f30432d7 MS |
1046 | If INIT is not a parameter list for a constructor, then set |
1047 | LOOKUP_ONLYCONVERTING. | |
6060a796 MS |
1048 | If FLAGS is LOOKUP_ONLYCONVERTING then it is the = init form of |
1049 | the initializer, if FLAGS is 0, then it is the (init) form. | |
8d08fdba | 1050 | If `init' is a CONSTRUCTOR, then we emit a warning message, |
59be0cdd | 1051 | explaining that such initializations are invalid. |
8d08fdba | 1052 | |
8d08fdba MS |
1053 | If INIT resolves to a CALL_EXPR which happens to return |
1054 | something of the type we are looking for, then we know | |
1055 | that we can safely use that call to perform the | |
1056 | initialization. | |
1057 | ||
1058 | The virtual function table pointer cannot be set up here, because | |
1059 | we do not really know its type. | |
1060 | ||
8d08fdba MS |
1061 | This never calls operator=(). |
1062 | ||
1063 | When initializing, nothing is CONST. | |
1064 | ||
1065 | A default copy constructor may have to be used to perform the | |
1066 | initialization. | |
1067 | ||
1068 | A constructor or a conversion operator may have to be used to | |
e92cc029 | 1069 | perform the initialization, but not both, as it would be ambiguous. */ |
8d08fdba | 1070 | |
f1dedc31 | 1071 | tree |
362efdc1 | 1072 | build_aggr_init (tree exp, tree init, int flags) |
8d08fdba | 1073 | { |
f1dedc31 MM |
1074 | tree stmt_expr; |
1075 | tree compound_stmt; | |
1076 | int destroy_temps; | |
8d08fdba MS |
1077 | tree type = TREE_TYPE (exp); |
1078 | int was_const = TREE_READONLY (exp); | |
f30432d7 | 1079 | int was_volatile = TREE_THIS_VOLATILE (exp); |
2a3398e1 | 1080 | int is_global; |
8d08fdba MS |
1081 | |
1082 | if (init == error_mark_node) | |
f1dedc31 | 1083 | return error_mark_node; |
8d08fdba MS |
1084 | |
1085 | TREE_READONLY (exp) = 0; | |
f30432d7 MS |
1086 | TREE_THIS_VOLATILE (exp) = 0; |
1087 | ||
1088 | if (init && TREE_CODE (init) != TREE_LIST) | |
1089 | flags |= LOOKUP_ONLYCONVERTING; | |
8d08fdba MS |
1090 | |
1091 | if (TREE_CODE (type) == ARRAY_TYPE) | |
1092 | { | |
92a62aad MM |
1093 | /* An array may not be initialized use the parenthesized |
1094 | initialization form -- unless the initializer is "()". */ | |
1095 | if (init && TREE_CODE (init) == TREE_LIST) | |
8d08fdba | 1096 | { |
33bd39a2 | 1097 | error ("bad array initializer"); |
f1dedc31 | 1098 | return error_mark_node; |
8d08fdba | 1099 | } |
92a62aad MM |
1100 | /* Must arrange to initialize each element of EXP |
1101 | from elements of INIT. */ | |
1102 | tree itype = init ? TREE_TYPE (init) : NULL_TREE; | |
89d684bb | 1103 | if (cp_type_quals (type) != TYPE_UNQUALIFIED) |
b2153b98 KL |
1104 | TREE_TYPE (exp) = TYPE_MAIN_VARIANT (type); |
1105 | if (itype && cp_type_quals (itype) != TYPE_UNQUALIFIED) | |
92a62aad | 1106 | itype = TREE_TYPE (init) = TYPE_MAIN_VARIANT (itype); |
a48cccea | 1107 | stmt_expr = build_vec_init (exp, NULL_TREE, init, |
92a62aad MM |
1108 | itype && same_type_p (itype, |
1109 | TREE_TYPE (exp))); | |
8d08fdba | 1110 | TREE_READONLY (exp) = was_const; |
f30432d7 | 1111 | TREE_THIS_VOLATILE (exp) = was_volatile; |
8d08fdba | 1112 | TREE_TYPE (exp) = type; |
f376e137 MS |
1113 | if (init) |
1114 | TREE_TYPE (init) = itype; | |
f1dedc31 | 1115 | return stmt_expr; |
8d08fdba MS |
1116 | } |
1117 | ||
1118 | if (TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == PARM_DECL) | |
f4f206f4 | 1119 | /* Just know that we've seen something for this node. */ |
8d08fdba MS |
1120 | TREE_USED (exp) = 1; |
1121 | ||
e7843f33 | 1122 | TREE_TYPE (exp) = TYPE_MAIN_VARIANT (type); |
2a3398e1 | 1123 | is_global = begin_init_stmts (&stmt_expr, &compound_stmt); |
f2c5f623 | 1124 | destroy_temps = stmts_are_full_exprs_p (); |
ae499cce | 1125 | current_stmt_tree ()->stmts_are_full_exprs_p = 0; |
8d08fdba | 1126 | expand_aggr_init_1 (TYPE_BINFO (type), exp, exp, |
b370501f | 1127 | init, LOOKUP_NORMAL|flags); |
2a3398e1 | 1128 | stmt_expr = finish_init_stmts (is_global, stmt_expr, compound_stmt); |
ae499cce | 1129 | current_stmt_tree ()->stmts_are_full_exprs_p = destroy_temps; |
e7843f33 | 1130 | TREE_TYPE (exp) = type; |
8d08fdba | 1131 | TREE_READONLY (exp) = was_const; |
f30432d7 | 1132 | TREE_THIS_VOLATILE (exp) = was_volatile; |
f1dedc31 MM |
1133 | |
1134 | return stmt_expr; | |
8d08fdba MS |
1135 | } |
1136 | ||
6f30f1f1 JM |
1137 | /* Like build_aggr_init, but not just for aggregates. */ |
1138 | ||
1139 | tree | |
362efdc1 | 1140 | build_init (tree decl, tree init, int flags) |
6f30f1f1 JM |
1141 | { |
1142 | tree expr; | |
1143 | ||
1144 | if (IS_AGGR_TYPE (TREE_TYPE (decl)) | |
1145 | || TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) | |
1146 | expr = build_aggr_init (decl, init, flags); | |
1147 | else | |
8e3df2de MM |
1148 | expr = build (INIT_EXPR, TREE_TYPE (decl), decl, init); |
1149 | ||
6f30f1f1 JM |
1150 | return expr; |
1151 | } | |
1152 | ||
8d08fdba | 1153 | static void |
362efdc1 | 1154 | expand_default_init (tree binfo, tree true_exp, tree exp, tree init, int flags) |
8d08fdba | 1155 | { |
fc378698 | 1156 | tree type = TREE_TYPE (exp); |
9eb71d8c | 1157 | tree ctor_name; |
fc378698 | 1158 | |
8d08fdba MS |
1159 | /* It fails because there may not be a constructor which takes |
1160 | its own type as the first (or only parameter), but which does | |
1161 | take other types via a conversion. So, if the thing initializing | |
1162 | the expression is a unit element of type X, first try X(X&), | |
1163 | followed by initialization by X. If neither of these work | |
1164 | out, then look hard. */ | |
1165 | tree rval; | |
1166 | tree parms; | |
8d08fdba | 1167 | |
277294d7 | 1168 | if (init && TREE_CODE (init) != TREE_LIST |
faf5394a MS |
1169 | && (flags & LOOKUP_ONLYCONVERTING)) |
1170 | { | |
1171 | /* Base subobjects should only get direct-initialization. */ | |
1172 | if (true_exp != exp) | |
1173 | abort (); | |
1174 | ||
c37dc68e JM |
1175 | if (flags & DIRECT_BIND) |
1176 | /* Do nothing. We hit this in two cases: Reference initialization, | |
1177 | where we aren't initializing a real variable, so we don't want | |
1178 | to run a new constructor; and catching an exception, where we | |
1179 | have already built up the constructor call so we could wrap it | |
1180 | in an exception region. */; | |
92a62aad | 1181 | else if (BRACE_ENCLOSED_INITIALIZER_P (init)) |
8e3df2de | 1182 | { |
b216f69b MM |
1183 | /* A brace-enclosed initializer for an aggregate. */ |
1184 | my_friendly_assert (CP_AGGREGATE_TYPE_P (type), 20021016); | |
1185 | init = digest_init (type, init, (tree *)NULL); | |
8e3df2de | 1186 | } |
c37dc68e | 1187 | else |
37c46b43 | 1188 | init = ocp_convert (type, init, CONV_IMPLICIT|CONV_FORCE_TEMP, flags); |
faf5394a | 1189 | |
4e8dca1c JM |
1190 | if (TREE_CODE (init) == MUST_NOT_THROW_EXPR) |
1191 | /* We need to protect the initialization of a catch parm with a | |
1192 | call to terminate(), which shows up as a MUST_NOT_THROW_EXPR | |
c7ae64f2 | 1193 | around the TARGET_EXPR for the copy constructor. See |
4e8dca1c JM |
1194 | initialize_handler_parm. */ |
1195 | { | |
1196 | TREE_OPERAND (init, 0) = build (INIT_EXPR, TREE_TYPE (exp), exp, | |
1197 | TREE_OPERAND (init, 0)); | |
1198 | TREE_TYPE (init) = void_type_node; | |
1199 | } | |
c7ae64f2 JM |
1200 | else |
1201 | init = build (INIT_EXPR, TREE_TYPE (exp), exp, init); | |
1202 | TREE_SIDE_EFFECTS (init) = 1; | |
f1dedc31 | 1203 | finish_expr_stmt (init); |
faf5394a MS |
1204 | return; |
1205 | } | |
1206 | ||
b7484fbe MS |
1207 | if (init == NULL_TREE |
1208 | || (TREE_CODE (init) == TREE_LIST && ! TREE_TYPE (init))) | |
8d08fdba MS |
1209 | { |
1210 | parms = init; | |
db5ae43f MS |
1211 | if (parms) |
1212 | init = TREE_VALUE (parms); | |
8d08fdba | 1213 | } |
8d08fdba | 1214 | else |
051e6fd7 | 1215 | parms = build_tree_list (NULL_TREE, init); |
8d08fdba | 1216 | |
9eb71d8c MM |
1217 | if (true_exp == exp) |
1218 | ctor_name = complete_ctor_identifier; | |
1219 | else | |
1220 | ctor_name = base_ctor_identifier; | |
8d08fdba | 1221 | |
4ba126e4 | 1222 | rval = build_special_member_call (exp, ctor_name, parms, binfo, flags); |
25eb19ff | 1223 | if (TREE_SIDE_EFFECTS (rval)) |
e895113a | 1224 | finish_expr_stmt (convert_to_void (rval, NULL)); |
8d08fdba MS |
1225 | } |
1226 | ||
1227 | /* This function is responsible for initializing EXP with INIT | |
1228 | (if any). | |
1229 | ||
1230 | BINFO is the binfo of the type for who we are performing the | |
1231 | initialization. For example, if W is a virtual base class of A and B, | |
1232 | and C : A, B. | |
1233 | If we are initializing B, then W must contain B's W vtable, whereas | |
1234 | were we initializing C, W must contain C's W vtable. | |
1235 | ||
1236 | TRUE_EXP is nonzero if it is the true expression being initialized. | |
1237 | In this case, it may be EXP, or may just contain EXP. The reason we | |
1238 | need this is because if EXP is a base element of TRUE_EXP, we | |
1239 | don't necessarily know by looking at EXP where its virtual | |
1240 | baseclass fields should really be pointing. But we do know | |
1241 | from TRUE_EXP. In constructors, we don't know anything about | |
1242 | the value being initialized. | |
1243 | ||
9f880ef9 MM |
1244 | FLAGS is just passed to `build_new_method_call'. See that function |
1245 | for its description. */ | |
8d08fdba MS |
1246 | |
1247 | static void | |
362efdc1 | 1248 | expand_aggr_init_1 (tree binfo, tree true_exp, tree exp, tree init, int flags) |
8d08fdba MS |
1249 | { |
1250 | tree type = TREE_TYPE (exp); | |
8d08fdba MS |
1251 | |
1252 | my_friendly_assert (init != error_mark_node && type != error_mark_node, 211); | |
8e3df2de | 1253 | my_friendly_assert (building_stmt_tree (), 20021010); |
8d08fdba MS |
1254 | |
1255 | /* Use a function returning the desired type to initialize EXP for us. | |
1256 | If the function is a constructor, and its first argument is | |
1257 | NULL_TREE, know that it was meant for us--just slide exp on | |
1258 | in and expand the constructor. Constructors now come | |
1259 | as TARGET_EXPRs. */ | |
faf5394a MS |
1260 | |
1261 | if (init && TREE_CODE (exp) == VAR_DECL | |
1262 | && TREE_CODE (init) == CONSTRUCTOR | |
1263 | && TREE_HAS_CONSTRUCTOR (init)) | |
1264 | { | |
f1dedc31 MM |
1265 | /* If store_init_value returns NULL_TREE, the INIT has been |
1266 | record in the DECL_INITIAL for EXP. That means there's | |
1267 | nothing more we have to do. */ | |
25ebb82a RH |
1268 | init = store_init_value (exp, init); |
1269 | if (init) | |
1270 | finish_expr_stmt (init); | |
faf5394a MS |
1271 | return; |
1272 | } | |
1273 | ||
9e9ff709 MS |
1274 | /* We know that expand_default_init can handle everything we want |
1275 | at this point. */ | |
b370501f | 1276 | expand_default_init (binfo, true_exp, exp, init, flags); |
8d08fdba MS |
1277 | } |
1278 | ||
be99da77 MS |
1279 | /* Report an error if TYPE is not a user-defined, aggregate type. If |
1280 | OR_ELSE is nonzero, give an error message. */ | |
e92cc029 | 1281 | |
be99da77 | 1282 | int |
362efdc1 | 1283 | is_aggr_type (tree type, int or_else) |
be99da77 MS |
1284 | { |
1285 | if (type == error_mark_node) | |
1286 | return 0; | |
1287 | ||
1288 | if (! IS_AGGR_TYPE (type) | |
73b0fce8 | 1289 | && TREE_CODE (type) != TEMPLATE_TYPE_PARM |
a1281f45 | 1290 | && TREE_CODE (type) != BOUND_TEMPLATE_TEMPLATE_PARM) |
be99da77 MS |
1291 | { |
1292 | if (or_else) | |
33bd39a2 | 1293 | error ("`%T' is not an aggregate type", type); |
be99da77 MS |
1294 | return 0; |
1295 | } | |
1296 | return 1; | |
1297 | } | |
1298 | ||
8d08fdba | 1299 | /* Like is_aggr_typedef, but returns typedef if successful. */ |
e92cc029 | 1300 | |
8d08fdba | 1301 | tree |
362efdc1 | 1302 | get_aggr_from_typedef (tree name, int or_else) |
8d08fdba MS |
1303 | { |
1304 | tree type; | |
1305 | ||
1306 | if (name == error_mark_node) | |
1307 | return NULL_TREE; | |
1308 | ||
1309 | if (IDENTIFIER_HAS_TYPE_VALUE (name)) | |
1310 | type = IDENTIFIER_TYPE_VALUE (name); | |
8d08fdba MS |
1311 | else |
1312 | { | |
1313 | if (or_else) | |
33bd39a2 | 1314 | error ("`%T' fails to be an aggregate typedef", name); |
8d08fdba MS |
1315 | return NULL_TREE; |
1316 | } | |
1317 | ||
1318 | if (! IS_AGGR_TYPE (type) | |
73b0fce8 | 1319 | && TREE_CODE (type) != TEMPLATE_TYPE_PARM |
a1281f45 | 1320 | && TREE_CODE (type) != BOUND_TEMPLATE_TEMPLATE_PARM) |
8d08fdba MS |
1321 | { |
1322 | if (or_else) | |
33bd39a2 | 1323 | error ("type `%T' is of non-aggregate type", type); |
8d08fdba MS |
1324 | return NULL_TREE; |
1325 | } | |
1326 | return type; | |
1327 | } | |
1328 | ||
1329 | tree | |
362efdc1 | 1330 | get_type_value (tree name) |
8d08fdba | 1331 | { |
8d08fdba MS |
1332 | if (name == error_mark_node) |
1333 | return NULL_TREE; | |
1334 | ||
1335 | if (IDENTIFIER_HAS_TYPE_VALUE (name)) | |
1336 | return IDENTIFIER_TYPE_VALUE (name); | |
8d08fdba MS |
1337 | else |
1338 | return NULL_TREE; | |
1339 | } | |
051e6fd7 | 1340 | |
a5ac359a MM |
1341 | /* Build a reference to a member of an aggregate. This is not a C++ |
1342 | `&', but really something which can have its address taken, and | |
1343 | then act as a pointer to member, for example TYPE :: FIELD can have | |
1344 | its address taken by saying & TYPE :: FIELD. ADDRESS_P is true if | |
1345 | this expression is the operand of "&". | |
8d08fdba MS |
1346 | |
1347 | @@ Prints out lousy diagnostics for operator <typename> | |
1348 | @@ fields. | |
1349 | ||
51c184be | 1350 | @@ This function should be rewritten and placed in search.c. */ |
e92cc029 | 1351 | |
8d08fdba | 1352 | tree |
a5ac359a | 1353 | build_offset_ref (tree type, tree name, bool address_p) |
8d08fdba | 1354 | { |
8d245821 | 1355 | tree decl; |
d6479fe7 | 1356 | tree member; |
fc378698 | 1357 | tree basebinfo = NULL_TREE; |
2a238a97 | 1358 | tree orig_name = name; |
8d08fdba | 1359 | |
5f311aec | 1360 | /* class templates can come in as TEMPLATE_DECLs here. */ |
874503bc | 1361 | if (TREE_CODE (name) == TEMPLATE_DECL) |
93cdc044 JM |
1362 | return name; |
1363 | ||
53b22f3d MM |
1364 | if (processing_template_decl || uses_template_parms (type)) |
1365 | return build_min_nt (SCOPE_REF, type, name); | |
5566b478 | 1366 | |
2a238a97 MM |
1367 | if (TREE_CODE (name) == TEMPLATE_ID_EXPR) |
1368 | { | |
1369 | /* If the NAME is a TEMPLATE_ID_EXPR, we are looking at | |
1370 | something like `a.template f<int>' or the like. For the most | |
1371 | part, we treat this just like a.f. We do remember, however, | |
1372 | the template-id that was used. */ | |
1373 | name = TREE_OPERAND (orig_name, 0); | |
e4a84209 | 1374 | |
c65a922c TP |
1375 | if (DECL_P (name)) |
1376 | name = DECL_NAME (name); | |
1377 | else | |
1378 | { | |
10b1d5e7 MM |
1379 | if (TREE_CODE (name) == COMPONENT_REF) |
1380 | name = TREE_OPERAND (name, 1); | |
1381 | if (TREE_CODE (name) == OVERLOAD) | |
1382 | name = DECL_NAME (OVL_CURRENT (name)); | |
c65a922c | 1383 | } |
e4a84209 | 1384 | |
2a238a97 MM |
1385 | my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 0); |
1386 | } | |
1387 | ||
c833d2be NS |
1388 | if (type == NULL_TREE) |
1389 | return error_mark_node; | |
1390 | ||
1391 | /* Handle namespace names fully here. */ | |
1392 | if (TREE_CODE (type) == NAMESPACE_DECL) | |
1393 | { | |
8d245821 | 1394 | tree t = lookup_namespace_name (type, name); |
c833d2be NS |
1395 | if (t == error_mark_node) |
1396 | return t; | |
1397 | if (TREE_CODE (orig_name) == TEMPLATE_ID_EXPR) | |
1398 | /* Reconstruct the TEMPLATE_ID_EXPR. */ | |
1399 | t = build (TEMPLATE_ID_EXPR, TREE_TYPE (t), | |
1400 | t, TREE_OPERAND (orig_name, 1)); | |
1401 | if (! type_unknown_p (t)) | |
1402 | { | |
1403 | mark_used (t); | |
1404 | t = convert_from_reference (t); | |
1405 | } | |
1406 | return t; | |
1407 | } | |
1408 | ||
1409 | if (! is_aggr_type (type, 1)) | |
1410 | return error_mark_node; | |
1411 | ||
8d08fdba MS |
1412 | if (TREE_CODE (name) == BIT_NOT_EXPR) |
1413 | { | |
1c2c08a5 | 1414 | if (! check_dtor_name (type, name)) |
33bd39a2 | 1415 | error ("qualified type `%T' does not match destructor name `~%T'", |
1c2c08a5 JM |
1416 | type, TREE_OPERAND (name, 0)); |
1417 | name = dtor_identifier; | |
8d08fdba | 1418 | } |
be99da77 | 1419 | |
d0f062fb | 1420 | if (!COMPLETE_TYPE_P (complete_type (type)) |
61a127b3 | 1421 | && !TYPE_BEING_DEFINED (type)) |
8d08fdba | 1422 | { |
33bd39a2 | 1423 | error ("incomplete type `%T' does not have member `%D'", type, |
61a127b3 | 1424 | name); |
8d08fdba MS |
1425 | return error_mark_node; |
1426 | } | |
1427 | ||
51924768 | 1428 | decl = maybe_dummy_object (type, &basebinfo); |
8d08fdba | 1429 | |
a723baf1 | 1430 | if (BASELINK_P (name) || DECL_P (name)) |
50ad9642 MM |
1431 | member = name; |
1432 | else | |
1433 | { | |
1434 | member = lookup_member (basebinfo, name, 1, 0); | |
1435 | ||
1436 | if (member == error_mark_node) | |
1437 | return error_mark_node; | |
1438 | } | |
00595019 | 1439 | |
a5ac359a MM |
1440 | if (!member) |
1441 | { | |
1442 | error ("`%D' is not a member of type `%T'", name, type); | |
1443 | return error_mark_node; | |
1444 | } | |
1445 | ||
1446 | if (TREE_CODE (member) == TYPE_DECL) | |
1447 | { | |
1448 | TREE_USED (member) = 1; | |
1449 | return member; | |
1450 | } | |
1451 | /* static class members and class-specific enum | |
1452 | values can be returned without further ado. */ | |
1453 | if (TREE_CODE (member) == VAR_DECL || TREE_CODE (member) == CONST_DECL) | |
1454 | { | |
1455 | mark_used (member); | |
1456 | return convert_from_reference (member); | |
1457 | } | |
1458 | ||
1459 | if (TREE_CODE (member) == FIELD_DECL && DECL_C_BIT_FIELD (member)) | |
1460 | { | |
1461 | error ("invalid pointer to bit-field `%D'", member); | |
1462 | return error_mark_node; | |
1463 | } | |
1464 | ||
aa52c1ff | 1465 | /* A lot of this logic is now handled in lookup_member. */ |
a5ac359a | 1466 | if (BASELINK_P (member)) |
8d08fdba | 1467 | { |
8d08fdba | 1468 | /* Go from the TREE_BASELINK to the member function info. */ |
d6479fe7 | 1469 | tree fnfields = member; |
8d245821 | 1470 | tree t = BASELINK_FUNCTIONS (fnfields); |
8d08fdba | 1471 | |
2a238a97 MM |
1472 | if (TREE_CODE (orig_name) == TEMPLATE_ID_EXPR) |
1473 | { | |
1474 | /* The FNFIELDS are going to contain functions that aren't | |
1475 | necessarily templates, and templates that don't | |
1476 | necessarily match the explicit template parameters. We | |
1477 | save all the functions, and the explicit parameters, and | |
1478 | then figure out exactly what to instantiate with what | |
1479 | arguments in instantiate_type. */ | |
1480 | ||
1481 | if (TREE_CODE (t) != OVERLOAD) | |
1482 | /* The code in instantiate_type which will process this | |
1483 | expects to encounter OVERLOADs, not raw functions. */ | |
1484 | t = ovl_cons (t, NULL_TREE); | |
051e6fd7 | 1485 | |
19420d00 NS |
1486 | t = build (TEMPLATE_ID_EXPR, TREE_TYPE (t), t, |
1487 | TREE_OPERAND (orig_name, 1)); | |
1488 | t = build (OFFSET_REF, unknown_type_node, decl, t); | |
1489 | ||
1490 | PTRMEM_OK_P (t) = 1; | |
1491 | ||
1492 | return t; | |
2a238a97 MM |
1493 | } |
1494 | ||
50ad9642 | 1495 | if (TREE_CODE (t) != TEMPLATE_ID_EXPR && !really_overloaded_fn (t)) |
8d08fdba | 1496 | { |
f4f206f4 | 1497 | /* Get rid of a potential OVERLOAD around it. */ |
2c73f9f5 ML |
1498 | t = OVL_CURRENT (t); |
1499 | ||
b54f5338 KL |
1500 | /* Unique functions are handled easily. */ |
1501 | ||
1502 | /* For non-static member of base class, we need a special rule | |
1503 | for access checking [class.protected]: | |
1504 | ||
1505 | If the access is to form a pointer to member, the | |
1506 | nested-name-specifier shall name the derived class | |
1507 | (or any class derived from that class). */ | |
1508 | if (address_p && DECL_P (t) | |
1509 | && DECL_NONSTATIC_MEMBER_P (t)) | |
1510 | perform_or_defer_access_check (TYPE_BINFO (type), t); | |
1511 | else | |
1512 | perform_or_defer_access_check (basebinfo, t); | |
1513 | ||
fc378698 | 1514 | mark_used (t); |
848b92e1 JM |
1515 | if (DECL_STATIC_FUNCTION_P (t)) |
1516 | return t; | |
a5ac359a MM |
1517 | member = t; |
1518 | } | |
1519 | else | |
1520 | { | |
1521 | TREE_TYPE (fnfields) = unknown_type_node; | |
1522 | member = fnfields; | |
8d08fdba | 1523 | } |
8d08fdba | 1524 | } |
b54f5338 KL |
1525 | else if (address_p && TREE_CODE (member) == FIELD_DECL) |
1526 | /* We need additional test besides the one in | |
1527 | check_accessibility_of_qualified_id in case it is | |
1528 | a pointer to non-static member. */ | |
1529 | perform_or_defer_access_check (TYPE_BINFO (type), member); | |
8d08fdba | 1530 | |
a5ac359a | 1531 | if (!address_p) |
8d08fdba | 1532 | { |
a5ac359a MM |
1533 | /* If MEMBER is non-static, then the program has fallen afoul of |
1534 | [expr.prim]: | |
8d08fdba | 1535 | |
a5ac359a MM |
1536 | An id-expression that denotes a nonstatic data member or |
1537 | nonstatic member function of a class can only be used: | |
8d08fdba | 1538 | |
a5ac359a MM |
1539 | -- as part of a class member access (_expr.ref_) in which the |
1540 | object-expression refers to the member's class or a class | |
1541 | derived from that class, or | |
b7484fbe | 1542 | |
a5ac359a MM |
1543 | -- to form a pointer to member (_expr.unary.op_), or |
1544 | ||
1545 | -- in the body of a nonstatic member function of that class or | |
1546 | of a class derived from that class (_class.mfct.nonstatic_), or | |
1547 | ||
1548 | -- in a mem-initializer for a constructor for that class or for | |
1549 | a class derived from that class (_class.base.init_). */ | |
1550 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (member)) | |
1551 | { | |
e9525111 MM |
1552 | /* Build a representation of a the qualified name suitable |
1553 | for use as the operand to "&" -- even though the "&" is | |
1554 | not actually present. */ | |
1555 | member = build (OFFSET_REF, TREE_TYPE (member), decl, member); | |
a5ac359a MM |
1556 | /* In Microsoft mode, treat a non-static member function as if |
1557 | it were a pointer-to-member. */ | |
1558 | if (flag_ms_extensions) | |
1559 | { | |
a5ac359a MM |
1560 | PTRMEM_OK_P (member) = 1; |
1561 | return build_unary_op (ADDR_EXPR, member, 0); | |
1562 | } | |
e9525111 MM |
1563 | error ("invalid use of non-static member function `%D'", |
1564 | TREE_OPERAND (member, 1)); | |
1565 | return member; | |
a5ac359a MM |
1566 | } |
1567 | else if (TREE_CODE (member) == FIELD_DECL) | |
1568 | { | |
1569 | error ("invalid use of non-static data member `%D'", member); | |
1570 | return error_mark_node; | |
1571 | } | |
1572 | return member; | |
1573 | } | |
8d08fdba | 1574 | |
be99da77 MS |
1575 | /* In member functions, the form `type::name' is no longer |
1576 | equivalent to `this->type::name', at least not until | |
1577 | resolve_offset_ref. */ | |
a5ac359a | 1578 | member = build (OFFSET_REF, TREE_TYPE (member), decl, member); |
8d245821 MM |
1579 | PTRMEM_OK_P (member) = 1; |
1580 | return member; | |
8d08fdba MS |
1581 | } |
1582 | ||
fc611ce0 MM |
1583 | /* If DECL is a `const' declaration, and its value is a known |
1584 | constant, then return that value. */ | |
8d08fdba MS |
1585 | |
1586 | tree | |
362efdc1 | 1587 | decl_constant_value (tree decl) |
8d08fdba | 1588 | { |
a1652802 MM |
1589 | /* When we build a COND_EXPR, we don't know whether it will be used |
1590 | as an lvalue or as an rvalue. If it is an lvalue, it's not safe | |
1591 | to replace the second and third operands with their | |
1592 | initializers. So, we do that here. */ | |
1593 | if (TREE_CODE (decl) == COND_EXPR) | |
1594 | { | |
1595 | tree d1; | |
1596 | tree d2; | |
1597 | ||
1598 | d1 = decl_constant_value (TREE_OPERAND (decl, 1)); | |
1599 | d2 = decl_constant_value (TREE_OPERAND (decl, 2)); | |
1600 | ||
1601 | if (d1 != TREE_OPERAND (decl, 1) || d2 != TREE_OPERAND (decl, 2)) | |
1602 | return build (COND_EXPR, | |
1603 | TREE_TYPE (decl), | |
1604 | TREE_OPERAND (decl, 0), d1, d2); | |
1605 | } | |
1606 | ||
c353b8e3 MM |
1607 | if (DECL_P (decl) |
1608 | && (/* Enumeration constants are constant. */ | |
1609 | TREE_CODE (decl) == CONST_DECL | |
1610 | /* And so are variables with a 'const' type -- unless they | |
1611 | are also 'volatile'. */ | |
1612 | || CP_TYPE_CONST_NON_VOLATILE_P (TREE_TYPE (decl))) | |
4f976745 | 1613 | && TREE_CODE (decl) != PARM_DECL |
61a127b3 | 1614 | && DECL_INITIAL (decl) |
bd6dd845 | 1615 | && DECL_INITIAL (decl) != error_mark_node |
8d08fdba MS |
1616 | /* This is invalid if initial value is not constant. |
1617 | If it has either a function call, a memory reference, | |
1618 | or a variable, then re-evaluating it could give different results. */ | |
1619 | && TREE_CONSTANT (DECL_INITIAL (decl)) | |
1620 | /* Check for cases where this is sub-optimal, even though valid. */ | |
61a127b3 | 1621 | && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR) |
8d08fdba MS |
1622 | return DECL_INITIAL (decl); |
1623 | return decl; | |
1624 | } | |
1625 | \f | |
8d08fdba MS |
1626 | /* Common subroutines of build_new and build_vec_delete. */ |
1627 | ||
c787dd82 | 1628 | /* Call the global __builtin_delete to delete ADDR. */ |
8d08fdba | 1629 | |
bd6dd845 | 1630 | static tree |
362efdc1 | 1631 | build_builtin_delete_call (tree addr) |
8d08fdba | 1632 | { |
a6ecf8b6 | 1633 | mark_used (global_delete_fndecl); |
0c11ada6 | 1634 | return build_call (global_delete_fndecl, build_tree_list (NULL_TREE, addr)); |
8d08fdba MS |
1635 | } |
1636 | \f | |
1637 | /* Generate a C++ "new" expression. DECL is either a TREE_LIST | |
1638 | (which needs to go through some sort of groktypename) or it | |
1639 | is the name of the class we are newing. INIT is an initialization value. | |
1640 | It is either an EXPRLIST, an EXPR_NO_COMMAS, or something in braces. | |
1641 | If INIT is void_type_node, it means do *not* call a constructor | |
1642 | for this instance. | |
1643 | ||
1644 | For types with constructors, the data returned is initialized | |
1645 | by the appropriate constructor. | |
1646 | ||
1647 | Whether the type has a constructor or not, if it has a pointer | |
1648 | to a virtual function table, then that pointer is set up | |
1649 | here. | |
1650 | ||
1651 | Unless I am mistaken, a call to new () will return initialized | |
1652 | data regardless of whether the constructor itself is private or | |
8926095f | 1653 | not. NOPE; new fails if the constructor is private (jcm). |
8d08fdba MS |
1654 | |
1655 | Note that build_new does nothing to assure that any special | |
1656 | alignment requirements of the type are met. Rather, it leaves | |
1657 | it up to malloc to do the right thing. Otherwise, folding to | |
1658 | the right alignment cal cause problems if the user tries to later | |
1659 | free the memory returned by `new'. | |
1660 | ||
1661 | PLACEMENT is the `placement' list for user-defined operator new (). */ | |
1662 | ||
1663 | tree | |
362efdc1 | 1664 | build_new (tree placement, tree decl, tree init, int use_global_new) |
8d08fdba | 1665 | { |
a0d5fba7 | 1666 | tree type, rval; |
a703fb38 | 1667 | tree nelts = NULL_TREE, t; |
8926095f | 1668 | int has_array = 0; |
8d08fdba | 1669 | |
8d08fdba MS |
1670 | if (decl == error_mark_node) |
1671 | return error_mark_node; | |
1672 | ||
1673 | if (TREE_CODE (decl) == TREE_LIST) | |
1674 | { | |
1675 | tree absdcl = TREE_VALUE (decl); | |
1676 | tree last_absdcl = NULL_TREE; | |
8d08fdba MS |
1677 | |
1678 | if (current_function_decl | |
1679 | && DECL_CONSTRUCTOR_P (current_function_decl)) | |
2aa3110a | 1680 | my_friendly_assert (immediate_size_expand == 0, 19990926); |
8d08fdba MS |
1681 | |
1682 | nelts = integer_one_node; | |
1683 | ||
1684 | if (absdcl && TREE_CODE (absdcl) == CALL_EXPR) | |
a98facb0 | 1685 | abort (); |
8d08fdba MS |
1686 | while (absdcl && TREE_CODE (absdcl) == INDIRECT_REF) |
1687 | { | |
1688 | last_absdcl = absdcl; | |
1689 | absdcl = TREE_OPERAND (absdcl, 0); | |
1690 | } | |
1691 | ||
1692 | if (absdcl && TREE_CODE (absdcl) == ARRAY_REF) | |
1693 | { | |
f4f206f4 | 1694 | /* Probably meant to be a vec new. */ |
8d08fdba MS |
1695 | tree this_nelts; |
1696 | ||
51c184be MS |
1697 | while (TREE_OPERAND (absdcl, 0) |
1698 | && TREE_CODE (TREE_OPERAND (absdcl, 0)) == ARRAY_REF) | |
1699 | { | |
1700 | last_absdcl = absdcl; | |
1701 | absdcl = TREE_OPERAND (absdcl, 0); | |
1702 | } | |
1703 | ||
8d08fdba MS |
1704 | has_array = 1; |
1705 | this_nelts = TREE_OPERAND (absdcl, 1); | |
1706 | if (this_nelts != error_mark_node) | |
1707 | { | |
1708 | if (this_nelts == NULL_TREE) | |
8251199e | 1709 | error ("new of array type fails to specify size"); |
5156628f | 1710 | else if (processing_template_decl) |
5566b478 MS |
1711 | { |
1712 | nelts = this_nelts; | |
1713 | absdcl = TREE_OPERAND (absdcl, 0); | |
1714 | } | |
8d08fdba MS |
1715 | else |
1716 | { | |
12fa82db | 1717 | if (build_expr_type_conversion (WANT_INT | WANT_ENUM, |
b746c5dc | 1718 | this_nelts, false) |
6a8f78d5 JM |
1719 | == NULL_TREE) |
1720 | pedwarn ("size in array new must have integral type"); | |
1721 | ||
37c46b43 | 1722 | this_nelts = save_expr (cp_convert (sizetype, this_nelts)); |
8d08fdba MS |
1723 | absdcl = TREE_OPERAND (absdcl, 0); |
1724 | if (this_nelts == integer_zero_node) | |
1725 | { | |
8251199e | 1726 | warning ("zero size array reserves no space"); |
8d08fdba MS |
1727 | nelts = integer_zero_node; |
1728 | } | |
1729 | else | |
ab76ca54 | 1730 | nelts = cp_build_binary_op (MULT_EXPR, nelts, this_nelts); |
8d08fdba MS |
1731 | } |
1732 | } | |
1733 | else | |
1734 | nelts = integer_zero_node; | |
1735 | } | |
1736 | ||
1737 | if (last_absdcl) | |
1738 | TREE_OPERAND (last_absdcl, 0) = absdcl; | |
1739 | else | |
1740 | TREE_VALUE (decl) = absdcl; | |
1741 | ||
a0d5fba7 | 1742 | type = groktypename (decl); |
8926095f | 1743 | if (! type || type == error_mark_node) |
2aa3110a | 1744 | return error_mark_node; |
8d08fdba MS |
1745 | } |
1746 | else if (TREE_CODE (decl) == IDENTIFIER_NODE) | |
1747 | { | |
1748 | if (IDENTIFIER_HAS_TYPE_VALUE (decl)) | |
1749 | { | |
1750 | /* An aggregate type. */ | |
1751 | type = IDENTIFIER_TYPE_VALUE (decl); | |
d2e5ee5c | 1752 | decl = TYPE_MAIN_DECL (type); |
8d08fdba MS |
1753 | } |
1754 | else | |
1755 | { | |
1756 | /* A builtin type. */ | |
1757 | decl = lookup_name (decl, 1); | |
1758 | my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 215); | |
1759 | type = TREE_TYPE (decl); | |
1760 | } | |
8d08fdba MS |
1761 | } |
1762 | else if (TREE_CODE (decl) == TYPE_DECL) | |
1763 | { | |
1764 | type = TREE_TYPE (decl); | |
8d08fdba MS |
1765 | } |
1766 | else | |
1767 | { | |
1768 | type = decl; | |
d2e5ee5c | 1769 | decl = TYPE_MAIN_DECL (type); |
8d08fdba MS |
1770 | } |
1771 | ||
5156628f | 1772 | if (processing_template_decl) |
5566b478 | 1773 | { |
5566b478 | 1774 | if (has_array) |
a09ba2e0 MM |
1775 | t = tree_cons (tree_cons (NULL_TREE, type, NULL_TREE), |
1776 | build_min_nt (ARRAY_REF, NULL_TREE, nelts), | |
1777 | NULL_TREE); | |
5566b478 MS |
1778 | else |
1779 | t = type; | |
1780 | ||
c006d942 MM |
1781 | rval = build_min (NEW_EXPR, build_pointer_type (type), |
1782 | placement, t, init); | |
5566b478 MS |
1783 | NEW_EXPR_USE_GLOBAL (rval) = use_global_new; |
1784 | return rval; | |
1785 | } | |
1786 | ||
8926095f MS |
1787 | /* ``A reference cannot be created by the new operator. A reference |
1788 | is not an object (8.2.2, 8.4.3), so a pointer to it could not be | |
1789 | returned by new.'' ARM 5.3.3 */ | |
1790 | if (TREE_CODE (type) == REFERENCE_TYPE) | |
8d08fdba | 1791 | { |
8251199e | 1792 | error ("new cannot be applied to a reference type"); |
a0d5fba7 | 1793 | type = TREE_TYPE (type); |
8d08fdba MS |
1794 | } |
1795 | ||
b7484fbe MS |
1796 | if (TREE_CODE (type) == FUNCTION_TYPE) |
1797 | { | |
8251199e | 1798 | error ("new cannot be applied to a function type"); |
b7484fbe MS |
1799 | return error_mark_node; |
1800 | } | |
1801 | ||
8926095f MS |
1802 | /* When the object being created is an array, the new-expression yields a |
1803 | pointer to the initial element (if any) of the array. For example, | |
1804 | both new int and new int[10] return an int*. 5.3.4. */ | |
1805 | if (TREE_CODE (type) == ARRAY_TYPE && has_array == 0) | |
8d08fdba | 1806 | { |
8926095f MS |
1807 | nelts = array_type_nelts_top (type); |
1808 | has_array = 1; | |
a0d5fba7 | 1809 | type = TREE_TYPE (type); |
8d08fdba MS |
1810 | } |
1811 | ||
a0d5fba7 JM |
1812 | if (has_array) |
1813 | t = build_nt (ARRAY_REF, type, nelts); | |
1814 | else | |
1815 | t = type; | |
1816 | ||
1817 | rval = build (NEW_EXPR, build_pointer_type (type), placement, t, init); | |
1818 | NEW_EXPR_USE_GLOBAL (rval) = use_global_new; | |
1819 | TREE_SIDE_EFFECTS (rval) = 1; | |
b3ab27f3 MM |
1820 | rval = build_new_1 (rval); |
1821 | if (rval == error_mark_node) | |
1822 | return error_mark_node; | |
a0d5fba7 JM |
1823 | |
1824 | /* Wrap it in a NOP_EXPR so warn_if_unused_value doesn't complain. */ | |
1825 | rval = build1 (NOP_EXPR, TREE_TYPE (rval), rval); | |
1826 | TREE_NO_UNUSED_WARNING (rval) = 1; | |
1827 | ||
a0d5fba7 JM |
1828 | return rval; |
1829 | } | |
1830 | ||
c6002625 | 1831 | /* Given a Java class, return a decl for the corresponding java.lang.Class. */ |
743f140d | 1832 | |
e97f22c9 | 1833 | tree |
362efdc1 | 1834 | build_java_class_ref (tree type) |
743f140d | 1835 | { |
ae0ed63a | 1836 | tree name = NULL_TREE, class_decl; |
d1a458c4 TT |
1837 | static tree CL_suffix = NULL_TREE; |
1838 | if (CL_suffix == NULL_TREE) | |
1839 | CL_suffix = get_identifier("class$"); | |
743f140d PB |
1840 | if (jclass_node == NULL_TREE) |
1841 | { | |
400500c4 | 1842 | jclass_node = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass")); |
743f140d | 1843 | if (jclass_node == NULL_TREE) |
400500c4 RK |
1844 | fatal_error ("call to Java constructor, while `jclass' undefined"); |
1845 | ||
743f140d PB |
1846 | jclass_node = TREE_TYPE (jclass_node); |
1847 | } | |
23d4e4cc | 1848 | |
f4f206f4 | 1849 | /* Mangle the class$ field. */ |
1f84ec23 MM |
1850 | { |
1851 | tree field; | |
1852 | for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) | |
1853 | if (DECL_NAME (field) == CL_suffix) | |
1854 | { | |
92643fea MM |
1855 | mangle_decl (field); |
1856 | name = DECL_ASSEMBLER_NAME (field); | |
1f84ec23 MM |
1857 | break; |
1858 | } | |
1859 | if (!field) | |
1f978f5f | 1860 | internal_error ("can't find class$"); |
23d4e4cc | 1861 | } |
23d4e4cc | 1862 | |
743f140d PB |
1863 | class_decl = IDENTIFIER_GLOBAL_VALUE (name); |
1864 | if (class_decl == NULL_TREE) | |
1865 | { | |
743f140d PB |
1866 | class_decl = build_decl (VAR_DECL, name, TREE_TYPE (jclass_node)); |
1867 | TREE_STATIC (class_decl) = 1; | |
1868 | DECL_EXTERNAL (class_decl) = 1; | |
1869 | TREE_PUBLIC (class_decl) = 1; | |
1870 | DECL_ARTIFICIAL (class_decl) = 1; | |
1871 | DECL_IGNORED_P (class_decl) = 1; | |
1872 | pushdecl_top_level (class_decl); | |
3e411c3f | 1873 | make_decl_rtl (class_decl, NULL); |
743f140d PB |
1874 | } |
1875 | return class_decl; | |
1876 | } | |
1877 | ||
d1a458c4 | 1878 | /* Returns the size of the cookie to use when allocating an array |
834c6dff MM |
1879 | whose elements have the indicated TYPE. Assumes that it is already |
1880 | known that a cookie is needed. */ | |
1881 | ||
1882 | static tree | |
362efdc1 | 1883 | get_cookie_size (tree type) |
834c6dff MM |
1884 | { |
1885 | tree cookie_size; | |
1886 | ||
3461fba7 NS |
1887 | /* We need to allocate an additional max (sizeof (size_t), alignof |
1888 | (true_type)) bytes. */ | |
1f84ec23 MM |
1889 | tree sizetype_size; |
1890 | tree type_align; | |
1891 | ||
1892 | sizetype_size = size_in_bytes (sizetype); | |
1893 | type_align = size_int (TYPE_ALIGN_UNIT (type)); | |
1894 | if (INT_CST_LT_UNSIGNED (type_align, sizetype_size)) | |
1895 | cookie_size = sizetype_size; | |
834c6dff | 1896 | else |
1f84ec23 | 1897 | cookie_size = type_align; |
834c6dff MM |
1898 | |
1899 | return cookie_size; | |
1900 | } | |
1901 | ||
a0d5fba7 JM |
1902 | /* Called from cplus_expand_expr when expanding a NEW_EXPR. The return |
1903 | value is immediately handed to expand_expr. */ | |
1904 | ||
834c6dff | 1905 | static tree |
362efdc1 | 1906 | build_new_1 (tree exp) |
a0d5fba7 | 1907 | { |
56c5d8bf | 1908 | tree placement, init; |
f4f4610e MM |
1909 | tree true_type, size, rval, t; |
1910 | /* The type of the new-expression. (This type is always a pointer | |
1911 | type.) */ | |
1912 | tree pointer_type; | |
1913 | /* The type pointed to by POINTER_TYPE. */ | |
1914 | tree type; | |
1915 | /* The type being allocated. For "new T[...]" this will be an | |
1916 | ARRAY_TYPE. */ | |
f30efcb7 | 1917 | tree full_type; |
f4f4610e MM |
1918 | /* A pointer type pointing to to the FULL_TYPE. */ |
1919 | tree full_pointer_type; | |
a48cccea | 1920 | tree outer_nelts = NULL_TREE; |
a703fb38 | 1921 | tree nelts = NULL_TREE; |
f4f4610e MM |
1922 | tree alloc_call, alloc_expr; |
1923 | /* The address returned by the call to "operator new". This node is | |
1924 | a VAR_DECL and is therefore reusable. */ | |
1925 | tree alloc_node; | |
46ff5047 | 1926 | tree alloc_fn; |
8b5e2ce4 | 1927 | tree cookie_expr, init_expr; |
a0d5fba7 | 1928 | int has_array = 0; |
834c6dff | 1929 | enum tree_code code; |
089d6ea7 | 1930 | int nothrow, check_new; |
834c6dff MM |
1931 | /* Nonzero if the user wrote `::new' rather than just `new'. */ |
1932 | int globally_qualified_p; | |
743f140d | 1933 | int use_java_new = 0; |
834c6dff MM |
1934 | /* If non-NULL, the number of extra bytes to allocate at the |
1935 | beginning of the storage allocated for an array-new expression in | |
1936 | order to store the number of elements. */ | |
1937 | tree cookie_size = NULL_TREE; | |
3f41ffd8 MM |
1938 | /* True if the function we are calling is a placement allocation |
1939 | function. */ | |
1940 | bool placement_allocation_fn_p; | |
4f649415 | 1941 | tree args = NULL_TREE; |
f4f4610e | 1942 | /* True if the storage must be initialized, either by a constructor |
34cd5ae7 | 1943 | or due to an explicit new-initializer. */ |
f4f4610e MM |
1944 | bool is_initialized; |
1945 | /* The address of the thing allocated, not including any cookie. In | |
1946 | particular, if an array cookie is in use, DATA_ADDR is the | |
1947 | address of the first array element. This node is a VAR_DECL, and | |
1948 | is therefore reusable. */ | |
1949 | tree data_addr; | |
a0d5fba7 JM |
1950 | |
1951 | placement = TREE_OPERAND (exp, 0); | |
1952 | type = TREE_OPERAND (exp, 1); | |
1953 | init = TREE_OPERAND (exp, 2); | |
834c6dff | 1954 | globally_qualified_p = NEW_EXPR_USE_GLOBAL (exp); |
a0d5fba7 JM |
1955 | |
1956 | if (TREE_CODE (type) == ARRAY_REF) | |
1957 | { | |
1958 | has_array = 1; | |
a48cccea | 1959 | nelts = outer_nelts = TREE_OPERAND (type, 1); |
a0d5fba7 | 1960 | type = TREE_OPERAND (type, 0); |
f30efcb7 | 1961 | |
a48cccea JM |
1962 | /* Use an incomplete array type to avoid VLA headaches. */ |
1963 | full_type = build_cplus_array_type (type, NULL_TREE); | |
a0d5fba7 | 1964 | } |
f30efcb7 JM |
1965 | else |
1966 | full_type = type; | |
1967 | ||
a0d5fba7 JM |
1968 | true_type = type; |
1969 | ||
834c6dff MM |
1970 | code = has_array ? VEC_NEW_EXPR : NEW_EXPR; |
1971 | ||
8d08fdba MS |
1972 | /* If our base type is an array, then make sure we know how many elements |
1973 | it has. */ | |
1974 | while (TREE_CODE (true_type) == ARRAY_TYPE) | |
1975 | { | |
1976 | tree this_nelts = array_type_nelts_top (true_type); | |
ab76ca54 | 1977 | nelts = cp_build_binary_op (MULT_EXPR, nelts, this_nelts); |
8d08fdba MS |
1978 | true_type = TREE_TYPE (true_type); |
1979 | } | |
5566b478 | 1980 | |
66543169 | 1981 | if (!complete_type_or_else (true_type, exp)) |
8f259df3 | 1982 | return error_mark_node; |
5566b478 | 1983 | |
cc600f33 | 1984 | if (TREE_CODE (true_type) == VOID_TYPE) |
e1cd6e56 | 1985 | { |
8251199e | 1986 | error ("invalid type `void' for new"); |
e1cd6e56 MS |
1987 | return error_mark_node; |
1988 | } | |
1989 | ||
a7a64a77 MM |
1990 | if (abstract_virtuals_error (NULL_TREE, true_type)) |
1991 | return error_mark_node; | |
8926095f | 1992 | |
f4f4610e MM |
1993 | is_initialized = (TYPE_NEEDS_CONSTRUCTING (type) || init); |
1994 | if (CP_TYPE_CONST_P (true_type) && !is_initialized) | |
1995 | { | |
1996 | error ("uninitialized const in `new' of `%#T'", true_type); | |
1997 | return error_mark_node; | |
1998 | } | |
1999 | ||
089d6ea7 MM |
2000 | size = size_in_bytes (true_type); |
2001 | if (has_array) | |
2002 | size = size_binop (MULT_EXPR, size, convert (sizetype, nelts)); | |
a28e3c7f | 2003 | |
e92cc029 | 2004 | /* Allocate the object. */ |
9bfadf57 | 2005 | if (! placement && TYPE_FOR_JAVA (true_type)) |
743f140d | 2006 | { |
8c1bd4f5 | 2007 | tree class_addr, alloc_decl; |
743f140d | 2008 | tree class_decl = build_java_class_ref (true_type); |
8b60264b | 2009 | static const char alloc_name[] = "_Jv_AllocObject"; |
743f140d | 2010 | use_java_new = 1; |
6961a592 GB |
2011 | if (!get_global_value_if_present (get_identifier (alloc_name), |
2012 | &alloc_decl)) | |
b1e5b86c | 2013 | { |
6961a592 GB |
2014 | error ("call to Java constructor with `%s' undefined", alloc_name); |
2015 | return error_mark_node; | |
2016 | } | |
2017 | else if (really_overloaded_fn (alloc_decl)) | |
b1e5b86c | 2018 | { |
6961a592 GB |
2019 | error ("`%D' should never be overloaded", alloc_decl); |
2020 | return error_mark_node; | |
2021 | } | |
2022 | alloc_decl = OVL_CURRENT (alloc_decl); | |
743f140d | 2023 | class_addr = build1 (ADDR_EXPR, jclass_node, class_decl); |
96790071 JM |
2024 | alloc_call = (build_function_call |
2025 | (alloc_decl, | |
245c3c04 | 2026 | build_tree_list (NULL_TREE, class_addr))); |
743f140d | 2027 | } |
8d08fdba MS |
2028 | else |
2029 | { | |
834c6dff | 2030 | tree fnname; |
9f880ef9 | 2031 | tree fns; |
834c6dff | 2032 | |
596ea4e5 | 2033 | fnname = ansi_opname (code); |
834c6dff | 2034 | |
089d6ea7 MM |
2035 | if (!globally_qualified_p |
2036 | && CLASS_TYPE_P (true_type) | |
2037 | && (has_array | |
2038 | ? TYPE_HAS_ARRAY_NEW_OPERATOR (true_type) | |
2039 | : TYPE_HAS_NEW_OPERATOR (true_type))) | |
2040 | { | |
2041 | /* Use a class-specific operator new. */ | |
2042 | /* If a cookie is required, add some extra space. */ | |
2043 | if (has_array && TYPE_VEC_NEW_USES_COOKIE (true_type)) | |
2044 | { | |
2045 | cookie_size = get_cookie_size (true_type); | |
2046 | size = size_binop (PLUS_EXPR, size, cookie_size); | |
2047 | } | |
2048 | /* Create the argument list. */ | |
2049 | args = tree_cons (NULL_TREE, size, placement); | |
9f880ef9 MM |
2050 | /* Do name-lookup to find the appropriate operator. */ |
2051 | fns = lookup_fnfields (true_type, fnname, /*protect=*/2); | |
2052 | if (TREE_CODE (fns) == TREE_LIST) | |
2053 | { | |
2054 | error ("request for member `%D' is ambiguous", fnname); | |
2055 | print_candidates (fns); | |
2056 | return error_mark_node; | |
2057 | } | |
2058 | alloc_call = build_new_method_call (build_dummy_object (true_type), | |
2059 | fns, args, | |
2060 | /*conversion_path=*/NULL_TREE, | |
2061 | LOOKUP_NORMAL); | |
089d6ea7 | 2062 | } |
834c6dff | 2063 | else |
089d6ea7 MM |
2064 | { |
2065 | /* Use a global operator new. */ | |
125e6594 MM |
2066 | /* See if a cookie might be required. */ |
2067 | if (has_array && TYPE_VEC_NEW_USES_COOKIE (true_type)) | |
2068 | cookie_size = get_cookie_size (true_type); | |
2069 | else | |
2070 | cookie_size = NULL_TREE; | |
2071 | ||
2072 | alloc_call = build_operator_new_call (fnname, placement, | |
2073 | &size, &cookie_size); | |
089d6ea7 | 2074 | } |
8d08fdba MS |
2075 | } |
2076 | ||
96790071 | 2077 | if (alloc_call == error_mark_node) |
2bb5d995 JM |
2078 | return error_mark_node; |
2079 | ||
a6111661 JM |
2080 | /* In the simple case, we can stop now. */ |
2081 | pointer_type = build_pointer_type (type); | |
2082 | if (!cookie_size && !is_initialized) | |
2083 | return build_nop (pointer_type, alloc_call); | |
2084 | ||
2085 | /* While we're working, use a pointer to the type we've actually | |
2086 | allocated. Store the result of the call in a variable so that we | |
2087 | can use it more than once. */ | |
2088 | full_pointer_type = build_pointer_type (full_type); | |
2089 | alloc_expr = get_target_expr (build_nop (full_pointer_type, alloc_call)); | |
2090 | alloc_node = TARGET_EXPR_SLOT (alloc_expr); | |
2091 | ||
2092 | /* Strip any COMPOUND_EXPRs from ALLOC_CALL. */ | |
2093 | while (TREE_CODE (alloc_call) == COMPOUND_EXPR) | |
2094 | alloc_call = TREE_OPERAND (alloc_call, 1); | |
2095 | alloc_fn = get_callee_fndecl (alloc_call); | |
46ff5047 | 2096 | my_friendly_assert (alloc_fn != NULL_TREE, 20020325); |
089d6ea7 | 2097 | |
3f41ffd8 MM |
2098 | /* Now, check to see if this function is actually a placement |
2099 | allocation function. This can happen even when PLACEMENT is NULL | |
2100 | because we might have something like: | |
2101 | ||
2102 | struct S { void* operator new (size_t, int i = 0); }; | |
2103 | ||
2104 | A call to `new S' will get this allocation function, even though | |
2105 | there is no explicit placement argument. If there is more than | |
2106 | one argument, or there are variable arguments, then this is a | |
2107 | placement allocation function. */ | |
2108 | placement_allocation_fn_p | |
46ff5047 MM |
2109 | = (type_num_arguments (TREE_TYPE (alloc_fn)) > 1 |
2110 | || varargs_function_p (alloc_fn)); | |
96790071 | 2111 | |
a6111661 JM |
2112 | /* Preevaluate the placement args so that we don't reevaluate them for a |
2113 | placement delete. */ | |
2114 | if (placement_allocation_fn_p) | |
2115 | { | |
2116 | tree inits = NULL_TREE; | |
2117 | t = TREE_CHAIN (TREE_OPERAND (alloc_call, 1)); | |
2118 | for (; t; t = TREE_CHAIN (t)) | |
2119 | if (TREE_SIDE_EFFECTS (TREE_VALUE (t))) | |
2120 | { | |
2121 | tree init; | |
2122 | TREE_VALUE (t) = stabilize_expr (TREE_VALUE (t), &init); | |
2123 | if (inits) | |
2124 | inits = build (COMPOUND_EXPR, void_type_node, inits, init); | |
2125 | else | |
2126 | inits = init; | |
2127 | } | |
2128 | if (inits) | |
2129 | alloc_expr = build (COMPOUND_EXPR, TREE_TYPE (alloc_expr), inits, | |
2130 | alloc_expr); | |
2131 | } | |
2132 | ||
047f64a3 JM |
2133 | /* unless an allocation function is declared with an empty excep- |
2134 | tion-specification (_except.spec_), throw(), it indicates failure to | |
2135 | allocate storage by throwing a bad_alloc exception (clause _except_, | |
2136 | _lib.bad.alloc_); it returns a non-null pointer otherwise If the allo- | |
2137 | cation function is declared with an empty exception-specification, | |
2138 | throw(), it returns null to indicate failure to allocate storage and a | |
2139 | non-null pointer otherwise. | |
2140 | ||
2141 | So check for a null exception spec on the op new we just called. */ | |
2142 | ||
46ff5047 | 2143 | nothrow = TYPE_NOTHROW_P (TREE_TYPE (alloc_fn)); |
743f140d | 2144 | check_new = (flag_check_new || nothrow) && ! use_java_new; |
047f64a3 | 2145 | |
089d6ea7 | 2146 | if (cookie_size) |
8d08fdba | 2147 | { |
96790071 | 2148 | tree cookie; |
f4f4610e MM |
2149 | |
2150 | /* Adjust so we're pointing to the start of the object. */ | |
2151 | data_addr = get_target_expr (build (PLUS_EXPR, full_pointer_type, | |
2152 | alloc_node, cookie_size)); | |
96790071 | 2153 | |
834c6dff | 2154 | /* Store the number of bytes allocated so that we can know how |
3461fba7 NS |
2155 | many elements to destroy later. We use the last sizeof |
2156 | (size_t) bytes to store the number of elements. */ | |
1f84ec23 | 2157 | cookie = build (MINUS_EXPR, build_pointer_type (sizetype), |
f4f4610e | 2158 | data_addr, size_in_bytes (sizetype)); |
3e411c3f | 2159 | cookie = build_indirect_ref (cookie, NULL); |
1f84ec23 | 2160 | |
f4f4610e | 2161 | cookie_expr = build (MODIFY_EXPR, sizetype, cookie, nelts); |
8b5e2ce4 | 2162 | data_addr = TARGET_EXPR_SLOT (data_addr); |
8d08fdba | 2163 | } |
96790071 | 2164 | else |
8b5e2ce4 JM |
2165 | { |
2166 | cookie_expr = NULL_TREE; | |
2167 | data_addr = alloc_node; | |
2168 | } | |
8d08fdba | 2169 | |
96790071 | 2170 | /* Now initialize the allocated object. */ |
f4f4610e | 2171 | if (is_initialized) |
8d08fdba | 2172 | { |
f4f4610e | 2173 | init_expr = build_indirect_ref (data_addr, NULL); |
f30efcb7 JM |
2174 | |
2175 | if (init == void_zero_node) | |
1cb8292f | 2176 | init = build_default_init (full_type, nelts); |
f30efcb7 | 2177 | else if (init && pedantic && has_array) |
33bd39a2 | 2178 | pedwarn ("ISO C++ forbids initialization in array new"); |
f30efcb7 JM |
2179 | |
2180 | if (has_array) | |
a48cccea JM |
2181 | init_expr |
2182 | = build_vec_init (init_expr, | |
2183 | cp_build_binary_op (MINUS_EXPR, outer_nelts, | |
2184 | integer_one_node), | |
2185 | init, /*from_array=*/0); | |
f30efcb7 | 2186 | else if (TYPE_NEEDS_CONSTRUCTING (type)) |
4ba126e4 MM |
2187 | init_expr = build_special_member_call (init_expr, |
2188 | complete_ctor_identifier, | |
2189 | init, TYPE_BINFO (true_type), | |
2190 | LOOKUP_NORMAL); | |
f30efcb7 | 2191 | else |
8d08fdba | 2192 | { |
01240200 MM |
2193 | /* We are processing something like `new int (10)', which |
2194 | means allocate an int, and initialize it with 10. */ | |
f30efcb7 JM |
2195 | |
2196 | if (TREE_CODE (init) == TREE_LIST) | |
c7b62f14 NS |
2197 | init = build_x_compound_expr_from_list (init, "new initializer"); |
2198 | ||
f30efcb7 JM |
2199 | else if (TREE_CODE (init) == CONSTRUCTOR |
2200 | && TREE_TYPE (init) == NULL_TREE) | |
2201 | { | |
2202 | pedwarn ("ISO C++ forbids aggregate initializer to new"); | |
2203 | init = digest_init (type, init, 0); | |
7215f9a0 | 2204 | } |
80170791 | 2205 | |
f30efcb7 | 2206 | init_expr = build_modify_expr (init_expr, INIT_EXPR, init); |
96790071 JM |
2207 | } |
2208 | ||
2209 | if (init_expr == error_mark_node) | |
2210 | return error_mark_node; | |
1f109f0f | 2211 | |
20c39572 JM |
2212 | /* If any part of the object initialization terminates by throwing an |
2213 | exception and a suitable deallocation function can be found, the | |
2214 | deallocation function is called to free the memory in which the | |
2215 | object was being constructed, after which the exception continues | |
2216 | to propagate in the context of the new-expression. If no | |
2217 | unambiguous matching deallocation function can be found, | |
2218 | propagating the exception does not cause the object's memory to be | |
2219 | freed. */ | |
96790071 | 2220 | if (flag_exceptions && ! use_java_new) |
1f109f0f | 2221 | { |
2face519 | 2222 | enum tree_code dcode = has_array ? VEC_DELETE_EXPR : DELETE_EXPR; |
96790071 | 2223 | tree cleanup; |
a7d87521 | 2224 | |
5355deec | 2225 | /* The Standard is unclear here, but the right thing to do |
f4f4610e MM |
2226 | is to use the same method for finding deallocation |
2227 | functions that we use for finding allocation functions. */ | |
5bd61841 MM |
2228 | cleanup = build_op_delete_call (dcode, alloc_node, size, |
2229 | globally_qualified_p, | |
3f41ffd8 MM |
2230 | (placement_allocation_fn_p |
2231 | ? alloc_call : NULL_TREE)); | |
2bb14213 | 2232 | |
2face519 JM |
2233 | /* Ack! First we allocate the memory. Then we set our sentry |
2234 | variable to true, and expand a cleanup that deletes the memory | |
96790071 JM |
2235 | if sentry is true. Then we run the constructor, and finally |
2236 | clear the sentry. | |
2237 | ||
2238 | It would be nice to be able to handle this without the sentry | |
2239 | variable, perhaps with a TRY_CATCH_EXPR, but this doesn't | |
2240 | work. We allocate the space first, so if there are any | |
2241 | temporaries with cleanups in the constructor args we need this | |
2242 | EH region to extend until end of full-expression to preserve | |
2243 | nesting. | |
2244 | ||
2245 | If the backend had some mechanism so that we could force the | |
2246 | allocation to be expanded after all the other args to the | |
2247 | constructor, that would fix the nesting problem and we could | |
2248 | do away with this complexity. But that would complicate other | |
2249 | things; in particular, it would make it difficult to bail out | |
8e51619a JM |
2250 | if the allocation function returns null. Er, no, it wouldn't; |
2251 | we just don't run the constructor. The standard says it's | |
4977bab6 ZW |
2252 | unspecified whether or not the args are evaluated. |
2253 | ||
2254 | FIXME FIXME FIXME inline invisible refs as refs. That way we | |
2255 | can preevaluate value parameters. */ | |
2face519 | 2256 | |
da4768fe JM |
2257 | if (cleanup) |
2258 | { | |
96790071 | 2259 | tree end, sentry, begin; |
2face519 JM |
2260 | |
2261 | begin = get_target_expr (boolean_true_node); | |
659e5a7a | 2262 | CLEANUP_EH_ONLY (begin) = 1; |
2face519 | 2263 | |
659e5a7a JM |
2264 | sentry = TARGET_EXPR_SLOT (begin); |
2265 | ||
2266 | TARGET_EXPR_CLEANUP (begin) | |
2face519 JM |
2267 | = build (COND_EXPR, void_type_node, sentry, |
2268 | cleanup, void_zero_node); | |
2face519 | 2269 | |
2face519 JM |
2270 | end = build (MODIFY_EXPR, TREE_TYPE (sentry), |
2271 | sentry, boolean_false_node); | |
2face519 | 2272 | |
96790071 JM |
2273 | init_expr |
2274 | = build (COMPOUND_EXPR, void_type_node, begin, | |
2275 | build (COMPOUND_EXPR, void_type_node, init_expr, | |
2276 | end)); | |
da4768fe | 2277 | } |
1f109f0f | 2278 | } |
f4f4610e | 2279 | } |
8b5e2ce4 JM |
2280 | else |
2281 | init_expr = NULL_TREE; | |
2282 | ||
2283 | /* Now build up the return value in reverse order. */ | |
96790071 | 2284 | |
8b5e2ce4 | 2285 | rval = data_addr; |
2face519 | 2286 | |
8b5e2ce4 JM |
2287 | if (init_expr) |
2288 | rval = build (COMPOUND_EXPR, TREE_TYPE (rval), init_expr, rval); | |
2289 | if (cookie_expr) | |
2290 | rval = build (COMPOUND_EXPR, TREE_TYPE (rval), cookie_expr, rval); | |
2291 | ||
2292 | if (rval == alloc_node) | |
2293 | /* If we don't have an initializer or a cookie, strip the TARGET_EXPR | |
2294 | and return the call (which doesn't need to be adjusted). */ | |
2295 | rval = TARGET_EXPR_INITIAL (alloc_expr); | |
2296 | else | |
d18c083e | 2297 | { |
8b5e2ce4 JM |
2298 | if (check_new) |
2299 | { | |
2300 | tree ifexp = cp_build_binary_op (NE_EXPR, alloc_node, | |
2301 | integer_zero_node); | |
2302 | rval = build_conditional_expr (ifexp, rval, alloc_node); | |
2303 | } | |
d18c083e | 2304 | |
8b5e2ce4 JM |
2305 | /* Perform the allocation before anything else, so that ALLOC_NODE |
2306 | has been initialized before we start using it. */ | |
2307 | rval = build (COMPOUND_EXPR, TREE_TYPE (rval), alloc_expr, rval); | |
2308 | } | |
51c184be | 2309 | |
f4f4610e | 2310 | /* Convert to the final type. */ |
d04a575f MM |
2311 | rval = build_nop (pointer_type, rval); |
2312 | ||
2313 | /* A new-expression is never an lvalue. */ | |
2314 | if (real_lvalue_p (rval)) | |
2315 | rval = build1 (NON_LVALUE_EXPR, TREE_TYPE (rval), rval); | |
2316 | ||
2317 | return rval; | |
8d08fdba MS |
2318 | } |
2319 | \f | |
f30432d7 | 2320 | static tree |
362efdc1 NN |
2321 | build_vec_delete_1 (tree base, tree maxindex, tree type, |
2322 | special_function_kind auto_delete_vec, int use_global_delete) | |
f30432d7 MS |
2323 | { |
2324 | tree virtual_size; | |
e92cc029 | 2325 | tree ptype = build_pointer_type (type = complete_type (type)); |
f30432d7 MS |
2326 | tree size_exp = size_in_bytes (type); |
2327 | ||
2328 | /* Temporary variables used by the loop. */ | |
2329 | tree tbase, tbase_init; | |
2330 | ||
2331 | /* This is the body of the loop that implements the deletion of a | |
2332 | single element, and moves temp variables to next elements. */ | |
2333 | tree body; | |
2334 | ||
2335 | /* This is the LOOP_EXPR that governs the deletion of the elements. */ | |
c7b62f14 | 2336 | tree loop = 0; |
f30432d7 MS |
2337 | |
2338 | /* This is the thing that governs what to do after the loop has run. */ | |
2339 | tree deallocate_expr = 0; | |
2340 | ||
2341 | /* This is the BIND_EXPR which holds the outermost iterator of the | |
2342 | loop. It is convenient to set this variable up and test it before | |
2343 | executing any other code in the loop. | |
2344 | This is also the containing expression returned by this function. */ | |
2345 | tree controller = NULL_TREE; | |
2346 | ||
b2153b98 KL |
2347 | /* We should only have 1-D arrays here. */ |
2348 | if (TREE_CODE (type) == ARRAY_TYPE) | |
2349 | abort (); | |
2350 | ||
834c6dff | 2351 | if (! IS_AGGR_TYPE (type) || TYPE_HAS_TRIVIAL_DESTRUCTOR (type)) |
c7b62f14 | 2352 | goto no_destructor; |
f30432d7 | 2353 | |
708cae97 | 2354 | /* The below is short by the cookie size. */ |
fed3cef0 RK |
2355 | virtual_size = size_binop (MULT_EXPR, size_exp, |
2356 | convert (sizetype, maxindex)); | |
f30432d7 | 2357 | |
46e8c075 | 2358 | tbase = create_temporary_var (ptype); |
f30432d7 MS |
2359 | tbase_init = build_modify_expr (tbase, NOP_EXPR, |
2360 | fold (build (PLUS_EXPR, ptype, | |
2361 | base, | |
2362 | virtual_size))); | |
2363 | DECL_REGISTER (tbase) = 1; | |
4dabb379 | 2364 | controller = build (BIND_EXPR, void_type_node, tbase, NULL_TREE, NULL_TREE); |
f30432d7 | 2365 | TREE_SIDE_EFFECTS (controller) = 1; |
f30432d7 | 2366 | |
c7b62f14 NS |
2367 | body = build (EXIT_EXPR, void_type_node, |
2368 | build (EQ_EXPR, boolean_type_node, base, tbase)); | |
2369 | body = build_compound_expr | |
2370 | (body, build_modify_expr (tbase, NOP_EXPR, | |
2371 | build (MINUS_EXPR, ptype, tbase, size_exp))); | |
2372 | body = build_compound_expr | |
2373 | (body, build_delete (ptype, tbase, sfk_complete_destructor, | |
2374 | LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 1)); | |
f30432d7 | 2375 | |
c7b62f14 NS |
2376 | loop = build (LOOP_EXPR, void_type_node, body); |
2377 | loop = build_compound_expr (tbase_init, loop); | |
f30432d7 MS |
2378 | |
2379 | no_destructor: | |
2380 | /* If the delete flag is one, or anything else with the low bit set, | |
2381 | delete the storage. */ | |
86f45d2c | 2382 | if (auto_delete_vec != sfk_base_destructor) |
f30432d7 MS |
2383 | { |
2384 | tree base_tbd; | |
2385 | ||
708cae97 | 2386 | /* The below is short by the cookie size. */ |
fed3cef0 RK |
2387 | virtual_size = size_binop (MULT_EXPR, size_exp, |
2388 | convert (sizetype, maxindex)); | |
f30432d7 MS |
2389 | |
2390 | if (! TYPE_VEC_NEW_USES_COOKIE (type)) | |
2391 | /* no header */ | |
2392 | base_tbd = base; | |
2393 | else | |
2394 | { | |
834c6dff MM |
2395 | tree cookie_size; |
2396 | ||
2397 | cookie_size = get_cookie_size (type); | |
2398 | base_tbd | |
2399 | = cp_convert (ptype, | |
ab76ca54 MM |
2400 | cp_build_binary_op (MINUS_EXPR, |
2401 | cp_convert (string_type_node, | |
2402 | base), | |
2403 | cookie_size)); | |
e92cc029 | 2404 | /* True size with header. */ |
834c6dff | 2405 | virtual_size = size_binop (PLUS_EXPR, virtual_size, cookie_size); |
f30432d7 | 2406 | } |
86f45d2c MM |
2407 | |
2408 | if (auto_delete_vec == sfk_deleting_destructor) | |
2409 | deallocate_expr = build_x_delete (base_tbd, | |
2410 | 2 | use_global_delete, | |
2411 | virtual_size); | |
f30432d7 MS |
2412 | } |
2413 | ||
c7b62f14 NS |
2414 | body = loop; |
2415 | if (!deallocate_expr) | |
2416 | ; | |
2417 | else if (!body) | |
2418 | body = deallocate_expr; | |
f30432d7 | 2419 | else |
c7b62f14 NS |
2420 | body = build_compound_expr (body, deallocate_expr); |
2421 | ||
2422 | if (!body) | |
2423 | body = integer_zero_node; | |
2424 | ||
f30432d7 | 2425 | /* Outermost wrapper: If pointer is null, punt. */ |
37f88e3e JM |
2426 | body = fold (build (COND_EXPR, void_type_node, |
2427 | fold (build (NE_EXPR, boolean_type_node, base, | |
9bf793f9 JL |
2428 | convert (TREE_TYPE (base), |
2429 | integer_zero_node))), | |
37f88e3e | 2430 | body, integer_zero_node)); |
f30432d7 MS |
2431 | body = build1 (NOP_EXPR, void_type_node, body); |
2432 | ||
2433 | if (controller) | |
2434 | { | |
2435 | TREE_OPERAND (controller, 1) = body; | |
4e8dca1c | 2436 | body = controller; |
f30432d7 | 2437 | } |
4e8dca1c JM |
2438 | |
2439 | if (TREE_CODE (base) == SAVE_EXPR) | |
2440 | /* Pre-evaluate the SAVE_EXPR outside of the BIND_EXPR. */ | |
2441 | body = build (COMPOUND_EXPR, void_type_node, base, body); | |
2442 | ||
8d245821 | 2443 | return convert_to_void (body, /*implicit=*/NULL); |
f30432d7 MS |
2444 | } |
2445 | ||
c395453c MM |
2446 | /* Create an unnamed variable of the indicated TYPE. */ |
2447 | ||
f1dedc31 | 2448 | tree |
362efdc1 | 2449 | create_temporary_var (tree type) |
8a72a046 | 2450 | { |
f1dedc31 MM |
2451 | tree decl; |
2452 | ||
2453 | decl = build_decl (VAR_DECL, NULL_TREE, type); | |
2454 | TREE_USED (decl) = 1; | |
2455 | DECL_ARTIFICIAL (decl) = 1; | |
f31686a3 | 2456 | DECL_SOURCE_LOCATION (decl) = input_location; |
f1dedc31 | 2457 | DECL_IGNORED_P (decl) = 1; |
b35d4555 | 2458 | DECL_CONTEXT (decl) = current_function_decl; |
f1dedc31 | 2459 | |
f1dedc31 | 2460 | return decl; |
8a72a046 MM |
2461 | } |
2462 | ||
f1dedc31 MM |
2463 | /* Create a new temporary variable of the indicated TYPE, initialized |
2464 | to INIT. | |
8a72a046 | 2465 | |
f1dedc31 MM |
2466 | It is not entered into current_binding_level, because that breaks |
2467 | things when it comes time to do final cleanups (which take place | |
2468 | "outside" the binding contour of the function). */ | |
2469 | ||
2470 | static tree | |
362efdc1 | 2471 | get_temp_regvar (tree type, tree init) |
f30432d7 | 2472 | { |
f1dedc31 | 2473 | tree decl; |
8a72a046 | 2474 | |
f1dedc31 | 2475 | decl = create_temporary_var (type); |
2a3398e1 NS |
2476 | add_decl_stmt (decl); |
2477 | ||
f1dedc31 | 2478 | finish_expr_stmt (build_modify_expr (decl, INIT_EXPR, init)); |
8a72a046 | 2479 | |
f1dedc31 | 2480 | return decl; |
f30432d7 MS |
2481 | } |
2482 | ||
f1dedc31 MM |
2483 | /* `build_vec_init' returns tree structure that performs |
2484 | initialization of a vector of aggregate types. | |
8d08fdba | 2485 | |
f30efcb7 | 2486 | BASE is a reference to the vector, of ARRAY_TYPE. |
a48cccea JM |
2487 | MAXINDEX is the maximum index of the array (one less than the |
2488 | number of elements). It is only used if | |
2489 | TYPE_DOMAIN (TREE_TYPE (BASE)) == NULL_TREE. | |
8d08fdba MS |
2490 | INIT is the (possibly NULL) initializer. |
2491 | ||
2492 | FROM_ARRAY is 0 if we should init everything with INIT | |
2493 | (i.e., every element initialized from INIT). | |
2494 | FROM_ARRAY is 1 if we should index into INIT in parallel | |
2495 | with initialization of DECL. | |
2496 | FROM_ARRAY is 2 if we should index into INIT in parallel, | |
2497 | but use assignment instead of initialization. */ | |
2498 | ||
2499 | tree | |
362efdc1 | 2500 | build_vec_init (tree base, tree maxindex, tree init, int from_array) |
8d08fdba MS |
2501 | { |
2502 | tree rval; | |
8a72a046 | 2503 | tree base2 = NULL_TREE; |
8d08fdba | 2504 | tree size; |
e833cb11 | 2505 | tree itype = NULL_TREE; |
8a72a046 | 2506 | tree iterator; |
f30efcb7 JM |
2507 | /* The type of the array. */ |
2508 | tree atype = TREE_TYPE (base); | |
f1dedc31 | 2509 | /* The type of an element in the array. */ |
f30efcb7 | 2510 | tree type = TREE_TYPE (atype); |
f1dedc31 MM |
2511 | /* The type of a pointer to an element in the array. */ |
2512 | tree ptype; | |
2513 | tree stmt_expr; | |
2514 | tree compound_stmt; | |
2515 | int destroy_temps; | |
f5984164 | 2516 | tree try_block = NULL_TREE; |
486837a7 | 2517 | tree try_body = NULL_TREE; |
8a72a046 | 2518 | int num_initialized_elts = 0; |
2a3398e1 NS |
2519 | bool is_global; |
2520 | ||
a48cccea JM |
2521 | if (TYPE_DOMAIN (atype)) |
2522 | maxindex = array_type_nelts (atype); | |
2523 | ||
2524 | if (maxindex == NULL_TREE || maxindex == error_mark_node) | |
8d08fdba MS |
2525 | return error_mark_node; |
2526 | ||
c8a3d889 AO |
2527 | if (init |
2528 | && (from_array == 2 | |
2529 | ? (!CLASS_TYPE_P (type) || !TYPE_HAS_COMPLEX_ASSIGN_REF (type)) | |
2530 | : !TYPE_NEEDS_CONSTRUCTING (type)) | |
f30efcb7 JM |
2531 | && ((TREE_CODE (init) == CONSTRUCTOR |
2532 | /* Don't do this if the CONSTRUCTOR might contain something | |
2533 | that might throw and require us to clean up. */ | |
2534 | && (CONSTRUCTOR_ELTS (init) == NULL_TREE | |
2535 | || ! TYPE_HAS_NONTRIVIAL_DESTRUCTOR (target_type (type)))) | |
2536 | || from_array)) | |
2537 | { | |
2538 | /* Do non-default initialization of POD arrays resulting from | |
2539 | brace-enclosed initializers. In this case, digest_init and | |
2540 | store_constructor will handle the semantics for us. */ | |
2541 | ||
2542 | stmt_expr = build (INIT_EXPR, atype, base, init); | |
f30efcb7 JM |
2543 | return stmt_expr; |
2544 | } | |
2545 | ||
2546 | maxindex = cp_convert (ptrdiff_type_node, maxindex); | |
f1dedc31 | 2547 | ptype = build_pointer_type (type); |
8d08fdba | 2548 | size = size_in_bytes (type); |
f30efcb7 | 2549 | if (TREE_CODE (TREE_TYPE (base)) == ARRAY_TYPE) |
0a72704b | 2550 | base = cp_convert (ptype, decay_conversion (base)); |
8d08fdba | 2551 | |
f1dedc31 | 2552 | /* The code we are generating looks like: |
303b7406 | 2553 | ({ |
f1dedc31 | 2554 | T* t1 = (T*) base; |
f30efcb7 | 2555 | T* rval = t1; |
f1dedc31 MM |
2556 | ptrdiff_t iterator = maxindex; |
2557 | try { | |
4977bab6 | 2558 | for (; iterator != -1; --iterator) { |
f30efcb7 JM |
2559 | ... initialize *t1 ... |
2560 | ++t1; | |
4977bab6 | 2561 | } |
f1dedc31 MM |
2562 | } catch (...) { |
2563 | ... destroy elements that were constructed ... | |
2564 | } | |
303b7406 NS |
2565 | rval; |
2566 | }) | |
f1dedc31 MM |
2567 | |
2568 | We can omit the try and catch blocks if we know that the | |
2569 | initialization will never throw an exception, or if the array | |
f30efcb7 | 2570 | elements do not have destructors. We can omit the loop completely if |
f1dedc31 MM |
2571 | the elements of the array do not have constructors. |
2572 | ||
2573 | We actually wrap the entire body of the above in a STMT_EXPR, for | |
2574 | tidiness. | |
2575 | ||
2576 | When copying from array to another, when the array elements have | |
2577 | only trivial copy constructors, we should use __builtin_memcpy | |
2578 | rather than generating a loop. That way, we could take advantage | |
2579 | of whatever cleverness the back-end has for dealing with copies | |
2580 | of blocks of memory. */ | |
2581 | ||
2a3398e1 | 2582 | is_global = begin_init_stmts (&stmt_expr, &compound_stmt); |
f2c5f623 | 2583 | destroy_temps = stmts_are_full_exprs_p (); |
ae499cce | 2584 | current_stmt_tree ()->stmts_are_full_exprs_p = 0; |
f30efcb7 | 2585 | rval = get_temp_regvar (ptype, base); |
f1dedc31 | 2586 | base = get_temp_regvar (ptype, rval); |
8a72a046 | 2587 | iterator = get_temp_regvar (ptrdiff_type_node, maxindex); |
8d08fdba | 2588 | |
8a72a046 | 2589 | /* Protect the entire array initialization so that we can destroy |
f30efcb7 JM |
2590 | the partially constructed array if an exception is thrown. |
2591 | But don't do this if we're assigning. */ | |
2592 | if (flag_exceptions && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) | |
2593 | && from_array != 2) | |
ed5511d9 MM |
2594 | { |
2595 | try_block = begin_try_block (); | |
7a3397c7 | 2596 | try_body = begin_compound_stmt (/*has_no_scope=*/true); |
ed5511d9 | 2597 | } |
8a72a046 | 2598 | |
f30efcb7 | 2599 | if (init != NULL_TREE && TREE_CODE (init) == CONSTRUCTOR) |
8d08fdba | 2600 | { |
f30efcb7 JM |
2601 | /* Do non-default initialization of non-POD arrays resulting from |
2602 | brace-enclosed initializers. */ | |
8a72a046 MM |
2603 | |
2604 | tree elts; | |
094fe153 JM |
2605 | from_array = 0; |
2606 | ||
8a72a046 | 2607 | for (elts = CONSTRUCTOR_ELTS (init); elts; elts = TREE_CHAIN (elts)) |
8d08fdba | 2608 | { |
8a72a046 | 2609 | tree elt = TREE_VALUE (elts); |
f1dedc31 | 2610 | tree baseref = build1 (INDIRECT_REF, type, base); |
8d08fdba | 2611 | |
8a72a046 | 2612 | num_initialized_elts++; |
8d08fdba | 2613 | |
67c03833 | 2614 | current_stmt_tree ()->stmts_are_full_exprs_p = 1; |
8a72a046 | 2615 | if (IS_AGGR_TYPE (type) || TREE_CODE (type) == ARRAY_TYPE) |
f1dedc31 | 2616 | finish_expr_stmt (build_aggr_init (baseref, elt, 0)); |
8a72a046 | 2617 | else |
f1dedc31 MM |
2618 | finish_expr_stmt (build_modify_expr (baseref, NOP_EXPR, |
2619 | elt)); | |
67c03833 | 2620 | current_stmt_tree ()->stmts_are_full_exprs_p = 0; |
8a72a046 | 2621 | |
f30efcb7 JM |
2622 | finish_expr_stmt (build_unary_op (PREINCREMENT_EXPR, base, 0)); |
2623 | finish_expr_stmt (build_unary_op (PREDECREMENT_EXPR, iterator, 0)); | |
8d08fdba | 2624 | } |
8d08fdba | 2625 | |
8a72a046 MM |
2626 | /* Clear out INIT so that we don't get confused below. */ |
2627 | init = NULL_TREE; | |
8d08fdba | 2628 | } |
8a72a046 | 2629 | else if (from_array) |
8d08fdba | 2630 | { |
8a72a046 MM |
2631 | /* If initializing one array from another, initialize element by |
2632 | element. We rely upon the below calls the do argument | |
2633 | checking. */ | |
8a72a046 MM |
2634 | if (init) |
2635 | { | |
0a72704b | 2636 | base2 = decay_conversion (init); |
8a72a046 MM |
2637 | itype = TREE_TYPE (base2); |
2638 | base2 = get_temp_regvar (itype, base2); | |
2639 | itype = TREE_TYPE (itype); | |
2640 | } | |
2641 | else if (TYPE_LANG_SPECIFIC (type) | |
2642 | && TYPE_NEEDS_CONSTRUCTING (type) | |
2643 | && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) | |
2644 | { | |
2645 | error ("initializer ends prematurely"); | |
2646 | return error_mark_node; | |
2647 | } | |
2648 | } | |
8d08fdba | 2649 | |
8a72a046 MM |
2650 | /* Now, default-initialize any remaining elements. We don't need to |
2651 | do that if a) the type does not need constructing, or b) we've | |
094fe153 JM |
2652 | already initialized all the elements. |
2653 | ||
2654 | We do need to keep going if we're copying an array. */ | |
2655 | ||
2656 | if (from_array | |
2657 | || (TYPE_NEEDS_CONSTRUCTING (type) | |
665f2503 | 2658 | && ! (host_integerp (maxindex, 0) |
05bccae2 | 2659 | && (num_initialized_elts |
665f2503 | 2660 | == tree_low_cst (maxindex, 0) + 1)))) |
8a72a046 | 2661 | { |
37e05cd5 | 2662 | /* If the ITERATOR is equal to -1, then we don't have to loop; |
8a72a046 | 2663 | we've already initialized all the elements. */ |
4977bab6 ZW |
2664 | tree for_stmt; |
2665 | tree for_body; | |
f1dedc31 MM |
2666 | tree elt_init; |
2667 | ||
4977bab6 ZW |
2668 | for_stmt = begin_for_stmt (); |
2669 | finish_for_init_stmt (for_stmt); | |
2670 | finish_for_cond (build (NE_EXPR, boolean_type_node, | |
2671 | iterator, integer_minus_one_node), | |
2672 | for_stmt); | |
2673 | finish_for_expr (build_unary_op (PREDECREMENT_EXPR, iterator, 0), | |
2674 | for_stmt); | |
8d08fdba | 2675 | |
8a72a046 | 2676 | /* Otherwise, loop through the elements. */ |
7a3397c7 | 2677 | for_body = begin_compound_stmt (/*has_no_scope=*/true); |
f1dedc31 | 2678 | |
8d08fdba MS |
2679 | if (from_array) |
2680 | { | |
2681 | tree to = build1 (INDIRECT_REF, type, base); | |
2682 | tree from; | |
2683 | ||
2684 | if (base2) | |
2685 | from = build1 (INDIRECT_REF, itype, base2); | |
2686 | else | |
2687 | from = NULL_TREE; | |
2688 | ||
2689 | if (from_array == 2) | |
f1dedc31 | 2690 | elt_init = build_modify_expr (to, NOP_EXPR, from); |
8d08fdba | 2691 | else if (TYPE_NEEDS_CONSTRUCTING (type)) |
f1dedc31 | 2692 | elt_init = build_aggr_init (to, from, 0); |
8d08fdba | 2693 | else if (from) |
f1dedc31 | 2694 | elt_init = build_modify_expr (to, NOP_EXPR, from); |
8d08fdba | 2695 | else |
a98facb0 | 2696 | abort (); |
8d08fdba MS |
2697 | } |
2698 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
2699 | { | |
2700 | if (init != 0) | |
f30efcb7 JM |
2701 | sorry |
2702 | ("cannot initialize multi-dimensional array with initializer"); | |
2703 | elt_init = build_vec_init (build1 (INDIRECT_REF, type, base), | |
a48cccea | 2704 | 0, 0, 0); |
f1dedc31 MM |
2705 | } |
2706 | else | |
2707 | elt_init = build_aggr_init (build1 (INDIRECT_REF, type, base), | |
2708 | init, 0); | |
2709 | ||
2a3398e1 NS |
2710 | current_stmt_tree ()->stmts_are_full_exprs_p = 1; |
2711 | finish_expr_stmt (elt_init); | |
2712 | current_stmt_tree ()->stmts_are_full_exprs_p = 0; | |
8d08fdba | 2713 | |
f30efcb7 | 2714 | finish_expr_stmt (build_unary_op (PREINCREMENT_EXPR, base, 0)); |
8d08fdba | 2715 | if (base2) |
f30efcb7 | 2716 | finish_expr_stmt (build_unary_op (PREINCREMENT_EXPR, base2, 0)); |
0fac6b0b | 2717 | |
7a3397c7 | 2718 | finish_compound_stmt (for_body); |
4977bab6 | 2719 | finish_for_stmt (for_stmt); |
8d08fdba | 2720 | } |
8a72a046 MM |
2721 | |
2722 | /* Make sure to cleanup any partially constructed elements. */ | |
f30efcb7 JM |
2723 | if (flag_exceptions && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) |
2724 | && from_array != 2) | |
f1dedc31 MM |
2725 | { |
2726 | tree e; | |
b2153b98 KL |
2727 | tree m = cp_build_binary_op (MINUS_EXPR, maxindex, iterator); |
2728 | ||
2729 | /* Flatten multi-dimensional array since build_vec_delete only | |
2730 | expects one-dimensional array. */ | |
2731 | if (TREE_CODE (type) == ARRAY_TYPE) | |
2732 | { | |
2733 | m = cp_build_binary_op (MULT_EXPR, m, | |
2734 | array_type_nelts_total (type)); | |
2735 | type = strip_array_types (type); | |
2736 | } | |
8d08fdba | 2737 | |
7a3397c7 | 2738 | finish_compound_stmt (try_body); |
ed5511d9 | 2739 | finish_cleanup_try_block (try_block); |
303b7406 | 2740 | e = build_vec_delete_1 (rval, m, type, sfk_base_destructor, |
f1dedc31 | 2741 | /*use_global_delete=*/0); |
f1dedc31 MM |
2742 | finish_cleanup (e, try_block); |
2743 | } | |
2744 | ||
303b7406 NS |
2745 | /* The value of the array initialization is the array itself, RVAL |
2746 | is a pointer to the first element. */ | |
2747 | finish_stmt_expr_expr (rval); | |
f1dedc31 | 2748 | |
2a3398e1 | 2749 | stmt_expr = finish_init_stmts (is_global, stmt_expr, compound_stmt); |
303b7406 | 2750 | |
04c06002 | 2751 | /* Now convert make the result have the correct type. */ |
303b7406 NS |
2752 | atype = build_pointer_type (atype); |
2753 | stmt_expr = build1 (NOP_EXPR, atype, stmt_expr); | |
2754 | stmt_expr = build_indirect_ref (stmt_expr, NULL); | |
2755 | ||
ae499cce | 2756 | current_stmt_tree ()->stmts_are_full_exprs_p = destroy_temps; |
f1dedc31 | 2757 | return stmt_expr; |
8d08fdba MS |
2758 | } |
2759 | ||
2760 | /* Free up storage of type TYPE, at address ADDR. | |
2761 | ||
2762 | TYPE is a POINTER_TYPE and can be ptr_type_node for no special type | |
2763 | of pointer. | |
2764 | ||
2765 | VIRTUAL_SIZE is the amount of storage that was allocated, and is | |
2766 | used as the second argument to operator delete. It can include | |
2767 | things like padding and magic size cookies. It has virtual in it, | |
2768 | because if you have a base pointer and you delete through a virtual | |
2769 | destructor, it should be the size of the dynamic object, not the | |
cab1f180 | 2770 | static object, see Free Store 12.5 ISO C++. |
8d08fdba MS |
2771 | |
2772 | This does not call any destructors. */ | |
e92cc029 | 2773 | |
8d08fdba | 2774 | tree |
362efdc1 | 2775 | build_x_delete (tree addr, int which_delete, tree virtual_size) |
8d08fdba | 2776 | { |
a28e3c7f MS |
2777 | int use_global_delete = which_delete & 1; |
2778 | int use_vec_delete = !!(which_delete & 2); | |
a28e3c7f | 2779 | enum tree_code code = use_vec_delete ? VEC_DELETE_EXPR : DELETE_EXPR; |
8d08fdba | 2780 | |
5bd61841 MM |
2781 | return build_op_delete_call (code, addr, virtual_size, use_global_delete, |
2782 | NULL_TREE); | |
8d08fdba MS |
2783 | } |
2784 | ||
86f45d2c MM |
2785 | /* Call the DTOR_KIND destructor for EXP. FLAGS are as for |
2786 | build_delete. */ | |
298d6f60 MM |
2787 | |
2788 | static tree | |
362efdc1 | 2789 | build_dtor_call (tree exp, special_function_kind dtor_kind, int flags) |
298d6f60 | 2790 | { |
86f45d2c | 2791 | tree name; |
ee76b931 | 2792 | tree fn; |
86f45d2c MM |
2793 | switch (dtor_kind) |
2794 | { | |
2795 | case sfk_complete_destructor: | |
2796 | name = complete_dtor_identifier; | |
2797 | break; | |
2798 | ||
2799 | case sfk_base_destructor: | |
2800 | name = base_dtor_identifier; | |
2801 | break; | |
2802 | ||
2803 | case sfk_deleting_destructor: | |
2804 | name = deleting_dtor_identifier; | |
2805 | break; | |
2806 | ||
2807 | default: | |
a98facb0 | 2808 | abort (); |
86f45d2c | 2809 | } |
ee76b931 MM |
2810 | |
2811 | exp = convert_from_reference (exp); | |
2812 | fn = lookup_fnfields (TREE_TYPE (exp), name, /*protect=*/2); | |
2813 | return build_new_method_call (exp, fn, | |
2814 | /*args=*/NULL_TREE, | |
2815 | /*conversion_path=*/NULL_TREE, | |
2816 | flags); | |
298d6f60 MM |
2817 | } |
2818 | ||
8d08fdba MS |
2819 | /* Generate a call to a destructor. TYPE is the type to cast ADDR to. |
2820 | ADDR is an expression which yields the store to be destroyed. | |
86f45d2c MM |
2821 | AUTO_DELETE is the name of the destructor to call, i.e., either |
2822 | sfk_complete_destructor, sfk_base_destructor, or | |
2823 | sfk_deleting_destructor. | |
8d08fdba MS |
2824 | |
2825 | FLAGS is the logical disjunction of zero or more LOOKUP_ | |
ade3dc07 | 2826 | flags. See cp-tree.h for more info. */ |
e92cc029 | 2827 | |
8d08fdba | 2828 | tree |
362efdc1 NN |
2829 | build_delete (tree type, tree addr, special_function_kind auto_delete, |
2830 | int flags, int use_global_delete) | |
8d08fdba | 2831 | { |
8d08fdba | 2832 | tree expr; |
8d08fdba MS |
2833 | |
2834 | if (addr == error_mark_node) | |
2835 | return error_mark_node; | |
2836 | ||
2837 | /* Can happen when CURRENT_EXCEPTION_OBJECT gets its type | |
2838 | set to `error_mark_node' before it gets properly cleaned up. */ | |
2839 | if (type == error_mark_node) | |
2840 | return error_mark_node; | |
2841 | ||
2842 | type = TYPE_MAIN_VARIANT (type); | |
2843 | ||
2844 | if (TREE_CODE (type) == POINTER_TYPE) | |
2845 | { | |
b1e5b86c GB |
2846 | bool complete_p = true; |
2847 | ||
2986ae00 | 2848 | type = TYPE_MAIN_VARIANT (TREE_TYPE (type)); |
8d08fdba MS |
2849 | if (TREE_CODE (type) == ARRAY_TYPE) |
2850 | goto handle_array; | |
23b4deba | 2851 | |
b1e5b86c GB |
2852 | /* We don't want to warn about delete of void*, only other |
2853 | incomplete types. Deleting other incomplete types | |
2854 | invokes undefined behavior, but it is not ill-formed, so | |
2855 | compile to something that would even do The Right Thing | |
2856 | (TM) should the type have a trivial dtor and no delete | |
2857 | operator. */ | |
2858 | if (!VOID_TYPE_P (type)) | |
8d08fdba | 2859 | { |
b1e5b86c GB |
2860 | complete_type (type); |
2861 | if (!COMPLETE_TYPE_P (type)) | |
2862 | { | |
2863 | warning ("possible problem detected in invocation of " | |
2864 | "delete operator:"); | |
2865 | cxx_incomplete_type_diagnostic (addr, type, 1); | |
2866 | inform ("neither the destructor nor the class-specific "\r | |
2867 | "operator delete will be called, even if they are "\r | |
2868 | "declared when the class is defined."); | |
2869 | complete_p = false; | |
2870 | } | |
8d08fdba | 2871 | } |
b1e5b86c GB |
2872 | if (VOID_TYPE_P (type) || !complete_p || !IS_AGGR_TYPE (type)) |
2873 | /* Call the builtin operator delete. */ | |
2874 | return build_builtin_delete_call (addr); | |
8d08fdba MS |
2875 | if (TREE_SIDE_EFFECTS (addr)) |
2876 | addr = save_expr (addr); | |
2986ae00 | 2877 | |
f4f206f4 | 2878 | /* Throw away const and volatile on target type of addr. */ |
6060a796 | 2879 | addr = convert_force (build_pointer_type (type), addr, 0); |
8d08fdba MS |
2880 | } |
2881 | else if (TREE_CODE (type) == ARRAY_TYPE) | |
2882 | { | |
2883 | handle_array: | |
6742d92b | 2884 | |
c407792d RK |
2885 | if (TYPE_DOMAIN (type) == NULL_TREE) |
2886 | { | |
8251199e | 2887 | error ("unknown array size in delete"); |
c407792d RK |
2888 | return error_mark_node; |
2889 | } | |
8d08fdba | 2890 | return build_vec_delete (addr, array_type_nelts (type), |
c7edeea3 | 2891 | auto_delete, use_global_delete); |
8d08fdba MS |
2892 | } |
2893 | else | |
2894 | { | |
2895 | /* Don't check PROTECT here; leave that decision to the | |
2896 | destructor. If the destructor is accessible, call it, | |
2897 | else report error. */ | |
2898 | addr = build_unary_op (ADDR_EXPR, addr, 0); | |
2899 | if (TREE_SIDE_EFFECTS (addr)) | |
2900 | addr = save_expr (addr); | |
2901 | ||
60696c53 | 2902 | addr = convert_force (build_pointer_type (type), addr, 0); |
8d08fdba MS |
2903 | } |
2904 | ||
2905 | my_friendly_assert (IS_AGGR_TYPE (type), 220); | |
2906 | ||
834c6dff | 2907 | if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type)) |
8d08fdba | 2908 | { |
60696c53 | 2909 | if (auto_delete != sfk_deleting_destructor) |
8d08fdba MS |
2910 | return void_zero_node; |
2911 | ||
da4768fe | 2912 | return build_op_delete_call |
5bd61841 | 2913 | (DELETE_EXPR, addr, cxx_sizeof_nowarn (type), use_global_delete, |
519ebd1e | 2914 | NULL_TREE); |
8d08fdba | 2915 | } |
ade3dc07 | 2916 | else |
8d08fdba | 2917 | { |
700f8a87 | 2918 | tree do_delete = NULL_TREE; |
bd6dd845 | 2919 | tree ifexp; |
700f8a87 | 2920 | |
ade3dc07 JM |
2921 | my_friendly_assert (TYPE_HAS_DESTRUCTOR (type), 20011213); |
2922 | ||
52682a1b MM |
2923 | /* For `::delete x', we must not use the deleting destructor |
2924 | since then we would not be sure to get the global `operator | |
2925 | delete'. */ | |
86f45d2c | 2926 | if (use_global_delete && auto_delete == sfk_deleting_destructor) |
700f8a87 | 2927 | { |
1b4a93f7 MM |
2928 | /* We will use ADDR multiple times so we must save it. */ |
2929 | addr = save_expr (addr); | |
c6002625 | 2930 | /* Delete the object. */ |
86f45d2c MM |
2931 | do_delete = build_builtin_delete_call (addr); |
2932 | /* Otherwise, treat this like a complete object destructor | |
2933 | call. */ | |
2934 | auto_delete = sfk_complete_destructor; | |
700f8a87 | 2935 | } |
52682a1b MM |
2936 | /* If the destructor is non-virtual, there is no deleting |
2937 | variant. Instead, we must explicitly call the appropriate | |
2938 | `operator delete' here. */ | |
2939 | else if (!DECL_VIRTUAL_P (CLASSTYPE_DESTRUCTORS (type)) | |
2940 | && auto_delete == sfk_deleting_destructor) | |
2941 | { | |
1b4a93f7 MM |
2942 | /* We will use ADDR multiple times so we must save it. */ |
2943 | addr = save_expr (addr); | |
2944 | /* Build the call. */ | |
52682a1b MM |
2945 | do_delete = build_op_delete_call (DELETE_EXPR, |
2946 | addr, | |
ea793912 | 2947 | cxx_sizeof_nowarn (type), |
5bd61841 | 2948 | /*global_p=*/false, |
52682a1b MM |
2949 | NULL_TREE); |
2950 | /* Call the complete object destructor. */ | |
2951 | auto_delete = sfk_complete_destructor; | |
2952 | } | |
e3fe84e5 JM |
2953 | else if (auto_delete == sfk_deleting_destructor |
2954 | && TYPE_GETS_REG_DELETE (type)) | |
2955 | { | |
2956 | /* Make sure we have access to the member op delete, even though | |
2957 | we'll actually be calling it from the destructor. */ | |
ea793912 | 2958 | build_op_delete_call (DELETE_EXPR, addr, cxx_sizeof_nowarn (type), |
5bd61841 | 2959 | /*global_p=*/false, NULL_TREE); |
e3fe84e5 | 2960 | } |
8d08fdba | 2961 | |
3e411c3f | 2962 | expr = build_dtor_call (build_indirect_ref (addr, NULL), |
1b4a93f7 | 2963 | auto_delete, flags); |
bd6dd845 MS |
2964 | if (do_delete) |
2965 | expr = build (COMPOUND_EXPR, void_type_node, expr, do_delete); | |
9e9ff709 | 2966 | |
bd6dd845 MS |
2967 | if (flags & LOOKUP_DESTRUCTOR) |
2968 | /* Explicit destructor call; don't check for null pointer. */ | |
2969 | ifexp = integer_one_node; | |
8d08fdba | 2970 | else |
bd6dd845 | 2971 | /* Handle deleting a null pointer. */ |
ab76ca54 | 2972 | ifexp = fold (cp_build_binary_op (NE_EXPR, addr, integer_zero_node)); |
8d08fdba | 2973 | |
bd6dd845 MS |
2974 | if (ifexp != integer_one_node) |
2975 | expr = build (COND_EXPR, void_type_node, | |
2976 | ifexp, expr, void_zero_node); | |
8d08fdba | 2977 | |
8d08fdba MS |
2978 | return expr; |
2979 | } | |
ade3dc07 | 2980 | } |
8d08fdba | 2981 | |
ade3dc07 JM |
2982 | /* At the beginning of a destructor, push cleanups that will call the |
2983 | destructors for our base classes and members. | |
2a2480e1 | 2984 | |
a29e1034 | 2985 | Called from begin_destructor_body. */ |
8d08fdba | 2986 | |
ade3dc07 | 2987 | void |
edaf3e03 | 2988 | push_base_cleanups (void) |
ade3dc07 JM |
2989 | { |
2990 | tree binfos; | |
2991 | int i, n_baseclasses; | |
2992 | tree member; | |
2993 | tree expr; | |
8d08fdba | 2994 | |
ade3dc07 JM |
2995 | /* Run destructors for all virtual baseclasses. */ |
2996 | if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)) | |
2997 | { | |
2998 | tree vbases; | |
2999 | tree cond = (condition_conversion | |
3000 | (build (BIT_AND_EXPR, integer_type_node, | |
3001 | current_in_charge_parm, | |
3002 | integer_two_node))); | |
8d08fdba | 3003 | |
ade3dc07 JM |
3004 | vbases = CLASSTYPE_VBASECLASSES (current_class_type); |
3005 | /* The CLASSTYPE_VBASECLASSES list is in initialization | |
3006 | order, which is also the right order for pushing cleanups. */ | |
3007 | for (; vbases; | |
3008 | vbases = TREE_CHAIN (vbases)) | |
8d08fdba | 3009 | { |
ade3dc07 JM |
3010 | tree vbase = TREE_VALUE (vbases); |
3011 | tree base_type = BINFO_TYPE (vbase); | |
3012 | ||
3013 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (base_type)) | |
8d08fdba | 3014 | { |
4ba126e4 MM |
3015 | expr = build_special_member_call (current_class_ref, |
3016 | base_dtor_identifier, | |
3017 | NULL_TREE, | |
3018 | vbase, | |
3019 | (LOOKUP_NORMAL | |
3020 | | LOOKUP_NONVIRTUAL)); | |
ade3dc07 JM |
3021 | expr = build (COND_EXPR, void_type_node, cond, |
3022 | expr, void_zero_node); | |
3023 | finish_decl_cleanup (NULL_TREE, expr); | |
8d08fdba MS |
3024 | } |
3025 | } | |
ade3dc07 JM |
3026 | } |
3027 | ||
3028 | binfos = BINFO_BASETYPES (TYPE_BINFO (current_class_type)); | |
3029 | n_baseclasses = CLASSTYPE_N_BASECLASSES (current_class_type); | |
8d08fdba | 3030 | |
ade3dc07 JM |
3031 | /* Take care of the remaining baseclasses. */ |
3032 | for (i = 0; i < n_baseclasses; i++) | |
3033 | { | |
3034 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
3035 | if (TYPE_HAS_TRIVIAL_DESTRUCTOR (BINFO_TYPE (base_binfo)) | |
3036 | || TREE_VIA_VIRTUAL (base_binfo)) | |
3037 | continue; | |
3038 | ||
4ba126e4 MM |
3039 | expr = build_special_member_call (current_class_ref, |
3040 | base_dtor_identifier, | |
3041 | NULL_TREE, base_binfo, | |
3042 | LOOKUP_NORMAL | LOOKUP_NONVIRTUAL); | |
ade3dc07 JM |
3043 | finish_decl_cleanup (NULL_TREE, expr); |
3044 | } | |
3045 | ||
3046 | for (member = TYPE_FIELDS (current_class_type); member; | |
3047 | member = TREE_CHAIN (member)) | |
3048 | { | |
17bbb839 | 3049 | if (TREE_CODE (member) != FIELD_DECL || DECL_ARTIFICIAL (member)) |
ade3dc07 JM |
3050 | continue; |
3051 | if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (member))) | |
3052 | { | |
50ad9642 MM |
3053 | tree this_member = (build_class_member_access_expr |
3054 | (current_class_ref, member, | |
3055 | /*access_path=*/NULL_TREE, | |
3056 | /*preserve_reference=*/false)); | |
ade3dc07 JM |
3057 | tree this_type = TREE_TYPE (member); |
3058 | expr = build_delete (this_type, this_member, | |
3059 | sfk_complete_destructor, | |
3060 | LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR|LOOKUP_NORMAL, | |
3061 | 0); | |
3062 | finish_decl_cleanup (NULL_TREE, expr); | |
3063 | } | |
8d08fdba MS |
3064 | } |
3065 | } | |
3066 | ||
3067 | /* For type TYPE, delete the virtual baseclass objects of DECL. */ | |
3068 | ||
3069 | tree | |
362efdc1 | 3070 | build_vbase_delete (tree type, tree decl) |
8d08fdba MS |
3071 | { |
3072 | tree vbases = CLASSTYPE_VBASECLASSES (type); | |
c7b62f14 | 3073 | tree result; |
8d08fdba MS |
3074 | tree addr = build_unary_op (ADDR_EXPR, decl, 0); |
3075 | ||
3076 | my_friendly_assert (addr != error_mark_node, 222); | |
3077 | ||
c7b62f14 NS |
3078 | for (result = convert_to_void (integer_zero_node, NULL); |
3079 | vbases; vbases = TREE_CHAIN (vbases)) | |
8d08fdba | 3080 | { |
c7b62f14 NS |
3081 | tree base_addr = convert_force |
3082 | (build_pointer_type (BINFO_TYPE (TREE_VALUE (vbases))), addr, 0); | |
3083 | tree base_delete = build_delete | |
3084 | (TREE_TYPE (base_addr), base_addr, sfk_base_destructor, | |
3085 | LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 0); | |
3086 | ||
3087 | result = build_compound_expr (result, base_delete); | |
8d08fdba | 3088 | } |
c7b62f14 | 3089 | return result; |
8d08fdba MS |
3090 | } |
3091 | ||
3092 | /* Build a C++ vector delete expression. | |
3093 | MAXINDEX is the number of elements to be deleted. | |
3094 | ELT_SIZE is the nominal size of each element in the vector. | |
3095 | BASE is the expression that should yield the store to be deleted. | |
8d08fdba MS |
3096 | This function expands (or synthesizes) these calls itself. |
3097 | AUTO_DELETE_VEC says whether the container (vector) should be deallocated. | |
8d08fdba MS |
3098 | |
3099 | This also calls delete for virtual baseclasses of elements of the vector. | |
3100 | ||
3101 | Update: MAXINDEX is no longer needed. The size can be extracted from the | |
3102 | start of the vector for pointers, and from the type for arrays. We still | |
3103 | use MAXINDEX for arrays because it happens to already have one of the | |
3104 | values we'd have to extract. (We could use MAXINDEX with pointers to | |
3105 | confirm the size, and trap if the numbers differ; not clear that it'd | |
3106 | be worth bothering.) */ | |
e92cc029 | 3107 | |
8d08fdba | 3108 | tree |
362efdc1 NN |
3109 | build_vec_delete (tree base, tree maxindex, |
3110 | special_function_kind auto_delete_vec, int use_global_delete) | |
8d08fdba | 3111 | { |
f30432d7 | 3112 | tree type; |
49b7aacb JM |
3113 | tree rval; |
3114 | tree base_init = NULL_TREE; | |
8d08fdba | 3115 | |
f30432d7 | 3116 | type = TREE_TYPE (base); |
c407792d | 3117 | |
f30432d7 | 3118 | if (TREE_CODE (type) == POINTER_TYPE) |
8d08fdba MS |
3119 | { |
3120 | /* Step back one from start of vector, and read dimension. */ | |
834c6dff MM |
3121 | tree cookie_addr; |
3122 | ||
6742d92b | 3123 | if (TREE_SIDE_EFFECTS (base)) |
49b7aacb JM |
3124 | { |
3125 | base_init = get_target_expr (base); | |
3126 | base = TARGET_EXPR_SLOT (base_init); | |
3127 | } | |
708cae97 | 3128 | type = strip_array_types (TREE_TYPE (type)); |
1f84ec23 MM |
3129 | cookie_addr = build (MINUS_EXPR, |
3130 | build_pointer_type (sizetype), | |
3131 | base, | |
3132 | TYPE_SIZE_UNIT (sizetype)); | |
3e411c3f | 3133 | maxindex = build_indirect_ref (cookie_addr, NULL); |
8d08fdba | 3134 | } |
f30432d7 | 3135 | else if (TREE_CODE (type) == ARRAY_TYPE) |
8d08fdba | 3136 | { |
f4f206f4 KH |
3137 | /* Get the total number of things in the array, maxindex is a |
3138 | bad name. */ | |
f30432d7 | 3139 | maxindex = array_type_nelts_total (type); |
834c6dff | 3140 | type = strip_array_types (type); |
8d08fdba | 3141 | base = build_unary_op (ADDR_EXPR, base, 1); |
6742d92b | 3142 | if (TREE_SIDE_EFFECTS (base)) |
49b7aacb JM |
3143 | { |
3144 | base_init = get_target_expr (base); | |
3145 | base = TARGET_EXPR_SLOT (base_init); | |
3146 | } | |
8d08fdba MS |
3147 | } |
3148 | else | |
3149 | { | |
9e9ff709 | 3150 | if (base != error_mark_node) |
8251199e | 3151 | error ("type to vector delete is neither pointer or array type"); |
8d08fdba MS |
3152 | return error_mark_node; |
3153 | } | |
8d08fdba | 3154 | |
49b7aacb | 3155 | rval = build_vec_delete_1 (base, maxindex, type, auto_delete_vec, |
f30432d7 | 3156 | use_global_delete); |
49b7aacb JM |
3157 | if (base_init) |
3158 | rval = build (COMPOUND_EXPR, TREE_TYPE (rval), base_init, rval); | |
3159 | ||
3160 | return rval; | |
8d08fdba | 3161 | } |