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ad321293 MM |
1 | /* Perform the semantic phase of parsing, i.e., the process of |
2 | building tree structure, checking semantic consistency, and | |
3 | building RTL. These routines are used both during actual parsing | |
4 | and during the instantiation of template functions. | |
5 | ||
5088b058 RH |
6 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
7 | Free Software Foundation, Inc. | |
ad321293 MM |
8 | Written by Mark Mitchell (mmitchell@usa.net) based on code found |
9 | formerly in parse.y and pt.c. | |
10 | ||
f5adbb8d | 11 | This file is part of GCC. |
ad321293 | 12 | |
f5adbb8d | 13 | GCC is free software; you can redistribute it and/or modify it |
ad321293 MM |
14 | under the terms of the GNU General Public License as published by |
15 | the Free Software Foundation; either version 2, or (at your option) | |
16 | any later version. | |
17 | ||
f5adbb8d | 18 | GCC is distributed in the hope that it will be useful, but |
ad321293 MM |
19 | WITHOUT ANY WARRANTY; without even the implied warranty of |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU General Public License | |
f5adbb8d | 24 | along with GCC; see the file COPYING. If not, write to the Free |
ad321293 MM |
25 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
26 | 02111-1307, USA. */ | |
27 | ||
28 | #include "config.h" | |
8d052bc7 | 29 | #include "system.h" |
4977bab6 ZW |
30 | #include "coretypes.h" |
31 | #include "tm.h" | |
ad321293 MM |
32 | #include "tree.h" |
33 | #include "cp-tree.h" | |
25af8512 | 34 | #include "tree-inline.h" |
6de9cd9a | 35 | #include "tree-mudflap.h" |
ad321293 | 36 | #include "except.h" |
12027a89 | 37 | #include "toplev.h" |
84df082b | 38 | #include "flags.h" |
d9b2d9da | 39 | #include "rtl.h" |
d6684bc8 | 40 | #include "expr.h" |
225ff119 | 41 | #include "output.h" |
ea11ca7e | 42 | #include "timevar.h" |
2b85879e | 43 | #include "debug.h" |
6de9cd9a | 44 | #include "diagnostic.h" |
8cd2462c | 45 | #include "cgraph.h" |
325c3691 | 46 | #include "tree-iterator.h" |
3e1f1ba5 | 47 | #include "vec.h" |
ad321293 MM |
48 | |
49 | /* There routines provide a modular interface to perform many parsing | |
50 | operations. They may therefore be used during actual parsing, or | |
51 | during template instantiation, which may be regarded as a | |
52 | degenerate form of parsing. Since the current g++ parser is | |
53 | lacking in several respects, and will be reimplemented, we are | |
54 | attempting to move most code that is not directly related to | |
55 | parsing into this file; that will make implementing the new parser | |
56 | much easier since it will be able to make use of these routines. */ | |
57 | ||
3a978d72 NN |
58 | static tree maybe_convert_cond (tree); |
59 | static tree simplify_aggr_init_exprs_r (tree *, int *, void *); | |
60 | static void emit_associated_thunks (tree); | |
6de9cd9a | 61 | static tree finalize_nrv_r (tree *, int *, void *); |
4985cde3 | 62 | |
558475f0 | 63 | |
8d241e0b KL |
64 | /* Deferred Access Checking Overview |
65 | --------------------------------- | |
66 | ||
67 | Most C++ expressions and declarations require access checking | |
68 | to be performed during parsing. However, in several cases, | |
69 | this has to be treated differently. | |
70 | ||
71 | For member declarations, access checking has to be deferred | |
72 | until more information about the declaration is known. For | |
73 | example: | |
74 | ||
75 | class A { | |
76 | typedef int X; | |
77 | public: | |
78 | X f(); | |
79 | }; | |
80 | ||
81 | A::X A::f(); | |
82 | A::X g(); | |
83 | ||
84 | When we are parsing the function return type `A::X', we don't | |
85 | really know if this is allowed until we parse the function name. | |
86 | ||
87 | Furthermore, some contexts require that access checking is | |
88 | never performed at all. These include class heads, and template | |
89 | instantiations. | |
90 | ||
91 | Typical use of access checking functions is described here: | |
92 | ||
93 | 1. When we enter a context that requires certain access checking | |
94 | mode, the function `push_deferring_access_checks' is called with | |
95 | DEFERRING argument specifying the desired mode. Access checking | |
96 | may be performed immediately (dk_no_deferred), deferred | |
97 | (dk_deferred), or not performed (dk_no_check). | |
98 | ||
99 | 2. When a declaration such as a type, or a variable, is encountered, | |
100 | the function `perform_or_defer_access_check' is called. It | |
101 | maintains a TREE_LIST of all deferred checks. | |
102 | ||
103 | 3. The global `current_class_type' or `current_function_decl' is then | |
104 | setup by the parser. `enforce_access' relies on these information | |
105 | to check access. | |
106 | ||
107 | 4. Upon exiting the context mentioned in step 1, | |
108 | `perform_deferred_access_checks' is called to check all declaration | |
109 | stored in the TREE_LIST. `pop_deferring_access_checks' is then | |
110 | called to restore the previous access checking mode. | |
111 | ||
112 | In case of parsing error, we simply call `pop_deferring_access_checks' | |
113 | without `perform_deferred_access_checks'. */ | |
114 | ||
3e1f1ba5 NS |
115 | typedef struct deferred_access GTY(()) |
116 | { | |
117 | /* A TREE_LIST representing name-lookups for which we have deferred | |
118 | checking access controls. We cannot check the accessibility of | |
119 | names used in a decl-specifier-seq until we know what is being | |
120 | declared because code like: | |
121 | ||
122 | class A { | |
123 | class B {}; | |
124 | B* f(); | |
125 | } | |
126 | ||
127 | A::B* A::f() { return 0; } | |
128 | ||
129 | is valid, even though `A::B' is not generally accessible. | |
130 | ||
131 | The TREE_PURPOSE of each node is the scope used to qualify the | |
132 | name being looked up; the TREE_VALUE is the DECL to which the | |
133 | name was resolved. */ | |
134 | tree deferred_access_checks; | |
135 | ||
136 | /* The current mode of access checks. */ | |
137 | enum deferring_kind deferring_access_checks_kind; | |
138 | ||
139 | } deferred_access; | |
140 | DEF_VEC_O (deferred_access); | |
141 | ||
cf22909c | 142 | /* Data for deferred access checking. */ |
3e1f1ba5 NS |
143 | static GTY(()) VEC (deferred_access) *deferred_access_stack; |
144 | static GTY(()) unsigned deferred_access_no_check; | |
cf22909c KL |
145 | |
146 | /* Save the current deferred access states and start deferred | |
147 | access checking iff DEFER_P is true. */ | |
148 | ||
572c2b17 AP |
149 | void |
150 | push_deferring_access_checks (deferring_kind deferring) | |
cf22909c | 151 | { |
78757caa KL |
152 | /* For context like template instantiation, access checking |
153 | disabling applies to all nested context. */ | |
3e1f1ba5 NS |
154 | if (deferred_access_no_check || deferring == dk_no_check) |
155 | deferred_access_no_check++; | |
cf22909c | 156 | else |
3e1f1ba5 NS |
157 | { |
158 | deferred_access *ptr; | |
cf22909c | 159 | |
3e1f1ba5 NS |
160 | ptr = VEC_safe_push (deferred_access, deferred_access_stack, NULL); |
161 | ptr->deferred_access_checks = NULL_TREE; | |
162 | ptr->deferring_access_checks_kind = deferring; | |
163 | } | |
cf22909c KL |
164 | } |
165 | ||
166 | /* Resume deferring access checks again after we stopped doing | |
167 | this previously. */ | |
168 | ||
572c2b17 AP |
169 | void |
170 | resume_deferring_access_checks (void) | |
cf22909c | 171 | { |
3e1f1ba5 NS |
172 | if (!deferred_access_no_check) |
173 | VEC_last (deferred_access, deferred_access_stack) | |
174 | ->deferring_access_checks_kind = dk_deferred; | |
cf22909c KL |
175 | } |
176 | ||
177 | /* Stop deferring access checks. */ | |
178 | ||
572c2b17 AP |
179 | void |
180 | stop_deferring_access_checks (void) | |
cf22909c | 181 | { |
3e1f1ba5 NS |
182 | if (!deferred_access_no_check) |
183 | VEC_last (deferred_access, deferred_access_stack) | |
184 | ->deferring_access_checks_kind = dk_no_deferred; | |
cf22909c KL |
185 | } |
186 | ||
187 | /* Discard the current deferred access checks and restore the | |
188 | previous states. */ | |
189 | ||
572c2b17 AP |
190 | void |
191 | pop_deferring_access_checks (void) | |
cf22909c | 192 | { |
3e1f1ba5 NS |
193 | if (deferred_access_no_check) |
194 | deferred_access_no_check--; | |
195 | else | |
196 | VEC_pop (deferred_access, deferred_access_stack); | |
cf22909c KL |
197 | } |
198 | ||
199 | /* Returns a TREE_LIST representing the deferred checks. | |
200 | The TREE_PURPOSE of each node is the type through which the | |
201 | access occurred; the TREE_VALUE is the declaration named. | |
202 | */ | |
203 | ||
572c2b17 AP |
204 | tree |
205 | get_deferred_access_checks (void) | |
cf22909c | 206 | { |
3e1f1ba5 NS |
207 | if (deferred_access_no_check) |
208 | return NULL; | |
209 | else | |
210 | return (VEC_last (deferred_access, deferred_access_stack) | |
211 | ->deferred_access_checks); | |
cf22909c KL |
212 | } |
213 | ||
214 | /* Take current deferred checks and combine with the | |
215 | previous states if we also defer checks previously. | |
216 | Otherwise perform checks now. */ | |
217 | ||
572c2b17 AP |
218 | void |
219 | pop_to_parent_deferring_access_checks (void) | |
cf22909c | 220 | { |
3e1f1ba5 NS |
221 | if (deferred_access_no_check) |
222 | deferred_access_no_check--; | |
223 | else | |
224 | { | |
225 | tree checks; | |
226 | deferred_access *ptr; | |
227 | ||
228 | checks = (VEC_last (deferred_access, deferred_access_stack) | |
229 | ->deferred_access_checks); | |
230 | ||
231 | VEC_pop (deferred_access, deferred_access_stack); | |
232 | ptr = VEC_last (deferred_access, deferred_access_stack); | |
233 | if (ptr->deferring_access_checks_kind == dk_no_deferred) | |
234 | { | |
235 | /* Check access. */ | |
236 | for (; checks; checks = TREE_CHAIN (checks)) | |
237 | enforce_access (TREE_PURPOSE (checks), | |
238 | TREE_VALUE (checks)); | |
239 | } | |
240 | else | |
241 | { | |
242 | /* Merge with parent. */ | |
243 | tree next; | |
244 | tree original = ptr->deferred_access_checks; | |
245 | ||
246 | for (; checks; checks = next) | |
247 | { | |
248 | tree probe; | |
249 | ||
250 | next = TREE_CHAIN (checks); | |
251 | ||
252 | for (probe = original; probe; probe = TREE_CHAIN (probe)) | |
253 | if (TREE_VALUE (probe) == TREE_VALUE (checks) | |
254 | && TREE_PURPOSE (probe) == TREE_PURPOSE (checks)) | |
255 | goto found; | |
256 | /* Insert into parent's checks. */ | |
257 | TREE_CHAIN (checks) = ptr->deferred_access_checks; | |
258 | ptr->deferred_access_checks = checks; | |
259 | found:; | |
260 | } | |
261 | } | |
262 | } | |
cf22909c KL |
263 | } |
264 | ||
25903d03 KL |
265 | /* Perform the deferred access checks. |
266 | ||
267 | After performing the checks, we still have to keep the list | |
268 | `deferred_access_stack->deferred_access_checks' since we may want | |
269 | to check access for them again later in a different context. | |
270 | For example: | |
271 | ||
272 | class A { | |
273 | typedef int X; | |
274 | static X a; | |
275 | }; | |
276 | A::X A::a, x; // No error for `A::a', error for `x' | |
277 | ||
278 | We have to perform deferred access of `A::X', first with `A::a', | |
279 | next with `x'. */ | |
cf22909c | 280 | |
572c2b17 AP |
281 | void |
282 | perform_deferred_access_checks (void) | |
cf22909c KL |
283 | { |
284 | tree deferred_check; | |
3e1f1ba5 NS |
285 | |
286 | for (deferred_check = (VEC_last (deferred_access, deferred_access_stack) | |
287 | ->deferred_access_checks); | |
cf22909c KL |
288 | deferred_check; |
289 | deferred_check = TREE_CHAIN (deferred_check)) | |
290 | /* Check access. */ | |
291 | enforce_access (TREE_PURPOSE (deferred_check), | |
292 | TREE_VALUE (deferred_check)); | |
cf22909c KL |
293 | } |
294 | ||
295 | /* Defer checking the accessibility of DECL, when looked up in | |
6df5158a | 296 | BINFO. */ |
cf22909c | 297 | |
572c2b17 AP |
298 | void |
299 | perform_or_defer_access_check (tree binfo, tree decl) | |
cf22909c KL |
300 | { |
301 | tree check; | |
3e1f1ba5 | 302 | deferred_access *ptr; |
cf22909c | 303 | |
3e1f1ba5 NS |
304 | /* Exit if we are in a context that no access checking is performed. |
305 | */ | |
306 | if (deferred_access_no_check) | |
0f2a66c9 | 307 | return; |
6df5158a | 308 | |
95b4aca6 | 309 | my_friendly_assert (TREE_CODE (binfo) == TREE_BINFO, 20030623); |
0f2a66c9 | 310 | |
3e1f1ba5 NS |
311 | ptr = VEC_last (deferred_access, deferred_access_stack); |
312 | ||
cf22909c | 313 | /* If we are not supposed to defer access checks, just check now. */ |
3e1f1ba5 | 314 | if (ptr->deferring_access_checks_kind == dk_no_deferred) |
cf22909c | 315 | { |
6df5158a | 316 | enforce_access (binfo, decl); |
cf22909c KL |
317 | return; |
318 | } | |
0f2a66c9 | 319 | |
cf22909c | 320 | /* See if we are already going to perform this check. */ |
3e1f1ba5 | 321 | for (check = ptr->deferred_access_checks; |
cf22909c KL |
322 | check; |
323 | check = TREE_CHAIN (check)) | |
6df5158a | 324 | if (TREE_VALUE (check) == decl && TREE_PURPOSE (check) == binfo) |
cf22909c KL |
325 | return; |
326 | /* If not, record the check. */ | |
3e1f1ba5 NS |
327 | ptr->deferred_access_checks |
328 | = tree_cons (binfo, decl, ptr->deferred_access_checks); | |
cf22909c KL |
329 | } |
330 | ||
838dfd8a | 331 | /* Returns nonzero if the current statement is a full expression, |
f2c5f623 BC |
332 | i.e. temporaries created during that statement should be destroyed |
333 | at the end of the statement. */ | |
35b1567d | 334 | |
f2c5f623 | 335 | int |
3a978d72 | 336 | stmts_are_full_exprs_p (void) |
f2c5f623 | 337 | { |
ae499cce MM |
338 | return current_stmt_tree ()->stmts_are_full_exprs_p; |
339 | } | |
340 | ||
341 | /* Returns the stmt_tree (if any) to which statements are currently | |
342 | being added. If there is no active statement-tree, NULL is | |
343 | returned. */ | |
344 | ||
345 | stmt_tree | |
3a978d72 | 346 | current_stmt_tree (void) |
ae499cce MM |
347 | { |
348 | return (cfun | |
e2500fed | 349 | ? &cfun->language->base.x_stmt_tree |
ae499cce | 350 | : &scope_chain->x_stmt_tree); |
f2c5f623 | 351 | } |
35b1567d | 352 | |
543a0daa RH |
353 | /* If statements are full expressions, wrap STMT in a CLEANUP_POINT_EXPR. */ |
354 | ||
355 | static tree | |
356 | maybe_cleanup_point_expr (tree expr) | |
357 | { | |
358 | if (!processing_template_decl && stmts_are_full_exprs_p ()) | |
359 | expr = fold (build1 (CLEANUP_POINT_EXPR, TREE_TYPE (expr), expr)); | |
360 | return expr; | |
361 | } | |
362 | ||
363 | /* Create a declaration statement for the declaration given by the DECL. */ | |
364 | ||
365 | void | |
350fae66 | 366 | add_decl_expr (tree decl) |
543a0daa | 367 | { |
350fae66 | 368 | tree r = build_stmt (DECL_EXPR, decl); |
543a0daa RH |
369 | if (DECL_INITIAL (decl)) |
370 | r = maybe_cleanup_point_expr (r); | |
371 | add_stmt (r); | |
372 | } | |
373 | ||
f2c5f623 BC |
374 | /* Nonzero if TYPE is an anonymous union or struct type. We have to use a |
375 | flag for this because "A union for which objects or pointers are | |
376 | declared is not an anonymous union" [class.union]. */ | |
35b1567d | 377 | |
f2c5f623 | 378 | int |
3a978d72 | 379 | anon_aggr_type_p (tree node) |
35b1567d | 380 | { |
e2500fed | 381 | return ANON_AGGR_TYPE_P (node); |
35b1567d BC |
382 | } |
383 | ||
f2c5f623 | 384 | /* Finish a scope. */ |
35b1567d | 385 | |
325c3691 RH |
386 | static tree |
387 | do_poplevel (tree stmt_list) | |
35b1567d | 388 | { |
325c3691 | 389 | tree block = NULL; |
35b1567d | 390 | |
f2c5f623 | 391 | if (stmts_are_full_exprs_p ()) |
325c3691 | 392 | block = poplevel (kept_level_p (), 1, 0); |
f2c5f623 | 393 | |
325c3691 RH |
394 | stmt_list = pop_stmt_list (stmt_list); |
395 | ||
396 | if (!processing_template_decl) | |
397 | { | |
398 | stmt_list = c_build_bind_expr (block, stmt_list); | |
399 | /* ??? See c_end_compound_stmt re statement expressions. */ | |
35b1567d BC |
400 | } |
401 | ||
325c3691 | 402 | return stmt_list; |
35b1567d BC |
403 | } |
404 | ||
f2c5f623 | 405 | /* Begin a new scope. */ |
35b1567d | 406 | |
325c3691 | 407 | static tree |
92bc1323 | 408 | do_pushlevel (scope_kind sk) |
35b1567d | 409 | { |
325c3691 | 410 | tree ret = push_stmt_list (); |
f2c5f623 | 411 | if (stmts_are_full_exprs_p ()) |
325c3691 RH |
412 | begin_scope (sk, NULL); |
413 | return ret; | |
414 | } | |
5a508662 RH |
415 | |
416 | /* Queue a cleanup. CLEANUP is an expression/statement to be executed | |
417 | when the current scope is exited. EH_ONLY is true when this is not | |
418 | meant to apply to normal control flow transfer. */ | |
419 | ||
420 | void | |
421 | push_cleanup (tree decl, tree cleanup, bool eh_only) | |
422 | { | |
423 | tree stmt = build_stmt (CLEANUP_STMT, NULL, cleanup, decl); | |
424 | CLEANUP_EH_ONLY (stmt) = eh_only; | |
425 | add_stmt (stmt); | |
426 | CLEANUP_BODY (stmt) = push_stmt_list (); | |
427 | } | |
325c3691 | 428 | |
caf2523d RH |
429 | /* Begin a conditional that might contain a declaration. When generating |
430 | normal code, we want the declaration to appear before the statement | |
431 | containing the conditional. When generating template code, we want the | |
350fae66 | 432 | conditional to be rendered as the raw DECL_EXPR. */ |
325c3691 RH |
433 | |
434 | static void | |
caf2523d | 435 | begin_cond (tree *cond_p) |
325c3691 | 436 | { |
caf2523d RH |
437 | if (processing_template_decl) |
438 | *cond_p = push_stmt_list (); | |
439 | } | |
440 | ||
441 | /* Finish such a conditional. */ | |
442 | ||
443 | static void | |
444 | finish_cond (tree *cond_p, tree expr) | |
445 | { | |
446 | if (processing_template_decl) | |
35b1567d | 447 | { |
caf2523d | 448 | tree cond = pop_stmt_list (*cond_p); |
350fae66 | 449 | if (TREE_CODE (cond) == DECL_EXPR) |
caf2523d | 450 | expr = cond; |
35b1567d | 451 | } |
caf2523d | 452 | *cond_p = expr; |
35b1567d BC |
453 | } |
454 | ||
325c3691 RH |
455 | /* If *COND_P specifies a conditional with a declaration, transform the |
456 | loop such that | |
caf2523d RH |
457 | while (A x = 42) { } |
458 | for (; A x = 42;) { } | |
325c3691 | 459 | becomes |
caf2523d RH |
460 | while (true) { A x = 42; if (!x) break; } |
461 | for (;;) { A x = 42; if (!x) break; } | |
462 | The statement list for BODY will be empty if the conditional did | |
463 | not declare anything. */ | |
464 | ||
325c3691 | 465 | static void |
caf2523d | 466 | simplify_loop_decl_cond (tree *cond_p, tree body) |
325c3691 | 467 | { |
caf2523d | 468 | tree cond, if_stmt; |
325c3691 | 469 | |
caf2523d RH |
470 | if (!TREE_SIDE_EFFECTS (body)) |
471 | return; | |
325c3691 | 472 | |
caf2523d RH |
473 | cond = *cond_p; |
474 | *cond_p = boolean_true_node; | |
475 | ||
476 | if_stmt = begin_if_stmt (); | |
477 | cond = build_unary_op (TRUTH_NOT_EXPR, cond, 0); | |
478 | finish_if_stmt_cond (cond, if_stmt); | |
479 | finish_break_stmt (); | |
480 | finish_then_clause (if_stmt); | |
481 | finish_if_stmt (if_stmt); | |
482 | } | |
325c3691 | 483 | |
35b1567d BC |
484 | /* Finish a goto-statement. */ |
485 | ||
3e4d04a1 | 486 | tree |
3a978d72 | 487 | finish_goto_stmt (tree destination) |
35b1567d BC |
488 | { |
489 | if (TREE_CODE (destination) == IDENTIFIER_NODE) | |
490 | destination = lookup_label (destination); | |
491 | ||
492 | /* We warn about unused labels with -Wunused. That means we have to | |
493 | mark the used labels as used. */ | |
494 | if (TREE_CODE (destination) == LABEL_DECL) | |
495 | TREE_USED (destination) = 1; | |
fc2b8477 MM |
496 | else |
497 | { | |
498 | /* The DESTINATION is being used as an rvalue. */ | |
499 | if (!processing_template_decl) | |
500 | destination = decay_conversion (destination); | |
501 | /* We don't inline calls to functions with computed gotos. | |
502 | Those functions are typically up to some funny business, | |
503 | and may be depending on the labels being at particular | |
504 | addresses, or some such. */ | |
505 | DECL_UNINLINABLE (current_function_decl) = 1; | |
506 | } | |
35b1567d BC |
507 | |
508 | check_goto (destination); | |
509 | ||
9e14e18f | 510 | return add_stmt (build_stmt (GOTO_EXPR, destination)); |
35b1567d BC |
511 | } |
512 | ||
ed5511d9 MM |
513 | /* COND is the condition-expression for an if, while, etc., |
514 | statement. Convert it to a boolean value, if appropriate. */ | |
515 | ||
8ce33230 | 516 | static tree |
3a978d72 | 517 | maybe_convert_cond (tree cond) |
ed5511d9 MM |
518 | { |
519 | /* Empty conditions remain empty. */ | |
520 | if (!cond) | |
521 | return NULL_TREE; | |
522 | ||
523 | /* Wait until we instantiate templates before doing conversion. */ | |
524 | if (processing_template_decl) | |
525 | return cond; | |
526 | ||
527 | /* Do the conversion. */ | |
528 | cond = convert_from_reference (cond); | |
529 | return condition_conversion (cond); | |
530 | } | |
531 | ||
9bfadf57 | 532 | /* Finish an expression-statement, whose EXPRESSION is as indicated. */ |
a7e4cfa0 | 533 | |
3e4d04a1 | 534 | tree |
3a978d72 | 535 | finish_expr_stmt (tree expr) |
ad321293 | 536 | { |
3e4d04a1 RH |
537 | tree r = NULL_TREE; |
538 | ||
ce4a0391 | 539 | if (expr != NULL_TREE) |
ad321293 | 540 | { |
a5bcc582 | 541 | if (!processing_template_decl) |
3a5b9284 RH |
542 | { |
543 | if (warn_sequence_point) | |
544 | verify_sequence_points (expr); | |
545 | expr = convert_to_void (expr, "statement"); | |
546 | } | |
47d4c811 NS |
547 | else if (!type_dependent_expression_p (expr)) |
548 | convert_to_void (build_non_dependent_expr (expr), "statement"); | |
325c3691 RH |
549 | |
550 | /* Simplification of inner statement expressions, compound exprs, | |
551 | etc can result in the us already having an EXPR_STMT. */ | |
543a0daa RH |
552 | if (TREE_CODE (expr) != CLEANUP_POINT_EXPR) |
553 | { | |
554 | if (TREE_CODE (expr) != EXPR_STMT) | |
555 | expr = build_stmt (EXPR_STMT, expr); | |
556 | expr = maybe_cleanup_point_expr (expr); | |
557 | } | |
558 | ||
325c3691 | 559 | r = add_stmt (expr); |
35b1567d | 560 | } |
364460b6 | 561 | |
35b1567d | 562 | finish_stmt (); |
558475f0 | 563 | |
3e4d04a1 | 564 | return r; |
35b1567d BC |
565 | } |
566 | ||
35b1567d | 567 | |
ad321293 MM |
568 | /* Begin an if-statement. Returns a newly created IF_STMT if |
569 | appropriate. */ | |
570 | ||
571 | tree | |
3a978d72 | 572 | begin_if_stmt (void) |
ad321293 | 573 | { |
325c3691 RH |
574 | tree r, scope; |
575 | scope = do_pushlevel (sk_block); | |
0dfdeca6 | 576 | r = build_stmt (IF_STMT, NULL_TREE, NULL_TREE, NULL_TREE); |
325c3691 | 577 | TREE_CHAIN (r) = scope; |
caf2523d | 578 | begin_cond (&IF_COND (r)); |
ad321293 MM |
579 | return r; |
580 | } | |
581 | ||
582 | /* Process the COND of an if-statement, which may be given by | |
583 | IF_STMT. */ | |
584 | ||
585 | void | |
3a978d72 | 586 | finish_if_stmt_cond (tree cond, tree if_stmt) |
ad321293 | 587 | { |
caf2523d RH |
588 | finish_cond (&IF_COND (if_stmt), maybe_convert_cond (cond)); |
589 | add_stmt (if_stmt); | |
325c3691 | 590 | THEN_CLAUSE (if_stmt) = push_stmt_list (); |
ad321293 MM |
591 | } |
592 | ||
593 | /* Finish the then-clause of an if-statement, which may be given by | |
594 | IF_STMT. */ | |
595 | ||
596 | tree | |
3a978d72 | 597 | finish_then_clause (tree if_stmt) |
ad321293 | 598 | { |
325c3691 | 599 | THEN_CLAUSE (if_stmt) = pop_stmt_list (THEN_CLAUSE (if_stmt)); |
35b1567d | 600 | return if_stmt; |
ad321293 MM |
601 | } |
602 | ||
603 | /* Begin the else-clause of an if-statement. */ | |
604 | ||
325c3691 RH |
605 | void |
606 | begin_else_clause (tree if_stmt) | |
ad321293 | 607 | { |
325c3691 | 608 | ELSE_CLAUSE (if_stmt) = push_stmt_list (); |
ad321293 MM |
609 | } |
610 | ||
611 | /* Finish the else-clause of an if-statement, which may be given by | |
612 | IF_STMT. */ | |
613 | ||
614 | void | |
3a978d72 | 615 | finish_else_clause (tree if_stmt) |
ad321293 | 616 | { |
325c3691 | 617 | ELSE_CLAUSE (if_stmt) = pop_stmt_list (ELSE_CLAUSE (if_stmt)); |
ad321293 MM |
618 | } |
619 | ||
dfbb4f34 | 620 | /* Finish an if-statement. */ |
ad321293 MM |
621 | |
622 | void | |
325c3691 | 623 | finish_if_stmt (tree if_stmt) |
ad321293 | 624 | { |
325c3691 RH |
625 | tree scope = TREE_CHAIN (if_stmt); |
626 | TREE_CHAIN (if_stmt) = NULL; | |
627 | add_stmt (do_poplevel (scope)); | |
ad321293 | 628 | finish_stmt (); |
35b1567d BC |
629 | } |
630 | ||
ad321293 MM |
631 | /* Begin a while-statement. Returns a newly created WHILE_STMT if |
632 | appropriate. */ | |
633 | ||
634 | tree | |
3a978d72 | 635 | begin_while_stmt (void) |
ad321293 MM |
636 | { |
637 | tree r; | |
0dfdeca6 | 638 | r = build_stmt (WHILE_STMT, NULL_TREE, NULL_TREE); |
ae499cce | 639 | add_stmt (r); |
325c3691 | 640 | WHILE_BODY (r) = do_pushlevel (sk_block); |
caf2523d | 641 | begin_cond (&WHILE_COND (r)); |
ad321293 MM |
642 | return r; |
643 | } | |
644 | ||
27d26ee7 | 645 | /* Process the COND of a while-statement, which may be given by |
ad321293 MM |
646 | WHILE_STMT. */ |
647 | ||
648 | void | |
3a978d72 | 649 | finish_while_stmt_cond (tree cond, tree while_stmt) |
ad321293 | 650 | { |
caf2523d RH |
651 | finish_cond (&WHILE_COND (while_stmt), maybe_convert_cond (cond)); |
652 | simplify_loop_decl_cond (&WHILE_COND (while_stmt), WHILE_BODY (while_stmt)); | |
ad321293 MM |
653 | } |
654 | ||
655 | /* Finish a while-statement, which may be given by WHILE_STMT. */ | |
656 | ||
657 | void | |
3a978d72 | 658 | finish_while_stmt (tree while_stmt) |
ad321293 | 659 | { |
325c3691 | 660 | WHILE_BODY (while_stmt) = do_poplevel (WHILE_BODY (while_stmt)); |
ad321293 MM |
661 | finish_stmt (); |
662 | } | |
663 | ||
664 | /* Begin a do-statement. Returns a newly created DO_STMT if | |
665 | appropriate. */ | |
666 | ||
667 | tree | |
3a978d72 | 668 | begin_do_stmt (void) |
ad321293 | 669 | { |
0dfdeca6 | 670 | tree r = build_stmt (DO_STMT, NULL_TREE, NULL_TREE); |
ae499cce | 671 | add_stmt (r); |
325c3691 | 672 | DO_BODY (r) = push_stmt_list (); |
35b1567d | 673 | return r; |
ad321293 MM |
674 | } |
675 | ||
676 | /* Finish the body of a do-statement, which may be given by DO_STMT. */ | |
677 | ||
678 | void | |
3a978d72 | 679 | finish_do_body (tree do_stmt) |
ad321293 | 680 | { |
325c3691 | 681 | DO_BODY (do_stmt) = pop_stmt_list (DO_BODY (do_stmt)); |
ad321293 MM |
682 | } |
683 | ||
684 | /* Finish a do-statement, which may be given by DO_STMT, and whose | |
685 | COND is as indicated. */ | |
686 | ||
687 | void | |
3a978d72 | 688 | finish_do_stmt (tree cond, tree do_stmt) |
ad321293 | 689 | { |
ed5511d9 | 690 | cond = maybe_convert_cond (cond); |
35b1567d BC |
691 | DO_COND (do_stmt) = cond; |
692 | finish_stmt (); | |
693 | } | |
ed5511d9 | 694 | |
ad321293 MM |
695 | /* Finish a return-statement. The EXPRESSION returned, if any, is as |
696 | indicated. */ | |
697 | ||
3e4d04a1 | 698 | tree |
3a978d72 | 699 | finish_return_stmt (tree expr) |
ad321293 | 700 | { |
3e4d04a1 RH |
701 | tree r; |
702 | ||
efc7052d | 703 | expr = check_return_expr (expr); |
35b1567d | 704 | if (!processing_template_decl) |
efee38a9 | 705 | { |
a0de9d20 | 706 | if (DECL_DESTRUCTOR_P (current_function_decl)) |
efee38a9 MM |
707 | { |
708 | /* Similarly, all destructors must run destructors for | |
709 | base-classes before returning. So, all returns in a | |
dfbb4f34 | 710 | destructor get sent to the DTOR_LABEL; finish_function emits |
efee38a9 | 711 | code to return a value there. */ |
3e4d04a1 | 712 | return finish_goto_stmt (dtor_label); |
efee38a9 MM |
713 | } |
714 | } | |
543a0daa | 715 | |
5088b058 | 716 | r = build_stmt (RETURN_EXPR, expr); |
543a0daa RH |
717 | r = maybe_cleanup_point_expr (r); |
718 | r = add_stmt (r); | |
35b1567d | 719 | finish_stmt (); |
3e4d04a1 RH |
720 | |
721 | return r; | |
35b1567d | 722 | } |
efee38a9 | 723 | |
ad321293 MM |
724 | /* Begin a for-statement. Returns a new FOR_STMT if appropriate. */ |
725 | ||
726 | tree | |
3a978d72 | 727 | begin_for_stmt (void) |
ad321293 MM |
728 | { |
729 | tree r; | |
730 | ||
0dfdeca6 BC |
731 | r = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE, |
732 | NULL_TREE, NULL_TREE); | |
325c3691 RH |
733 | |
734 | if (flag_new_for_scope > 0) | |
735 | TREE_CHAIN (r) = do_pushlevel (sk_for); | |
ad321293 | 736 | |
894ca2c9 RH |
737 | if (processing_template_decl) |
738 | FOR_INIT_STMT (r) = push_stmt_list (); | |
739 | ||
ad321293 MM |
740 | return r; |
741 | } | |
742 | ||
743 | /* Finish the for-init-statement of a for-statement, which may be | |
744 | given by FOR_STMT. */ | |
745 | ||
746 | void | |
3a978d72 | 747 | finish_for_init_stmt (tree for_stmt) |
ad321293 | 748 | { |
894ca2c9 RH |
749 | if (processing_template_decl) |
750 | FOR_INIT_STMT (for_stmt) = pop_stmt_list (FOR_INIT_STMT (for_stmt)); | |
325c3691 RH |
751 | add_stmt (for_stmt); |
752 | FOR_BODY (for_stmt) = do_pushlevel (sk_block); | |
caf2523d | 753 | begin_cond (&FOR_COND (for_stmt)); |
ad321293 MM |
754 | } |
755 | ||
756 | /* Finish the COND of a for-statement, which may be given by | |
757 | FOR_STMT. */ | |
758 | ||
759 | void | |
3a978d72 | 760 | finish_for_cond (tree cond, tree for_stmt) |
ad321293 | 761 | { |
caf2523d RH |
762 | finish_cond (&FOR_COND (for_stmt), maybe_convert_cond (cond)); |
763 | simplify_loop_decl_cond (&FOR_COND (for_stmt), FOR_BODY (for_stmt)); | |
ad321293 MM |
764 | } |
765 | ||
766 | /* Finish the increment-EXPRESSION in a for-statement, which may be | |
767 | given by FOR_STMT. */ | |
768 | ||
769 | void | |
3a978d72 | 770 | finish_for_expr (tree expr, tree for_stmt) |
ad321293 | 771 | { |
543a0daa RH |
772 | if (!expr) |
773 | return; | |
6f69173e MM |
774 | /* If EXPR is an overloaded function, issue an error; there is no |
775 | context available to use to perform overload resolution. */ | |
543a0daa | 776 | if (type_unknown_p (expr)) |
6f69173e MM |
777 | { |
778 | cxx_incomplete_type_error (expr, TREE_TYPE (expr)); | |
779 | expr = error_mark_node; | |
780 | } | |
543a0daa | 781 | expr = maybe_cleanup_point_expr (expr); |
35b1567d | 782 | FOR_EXPR (for_stmt) = expr; |
ad321293 MM |
783 | } |
784 | ||
785 | /* Finish the body of a for-statement, which may be given by | |
786 | FOR_STMT. The increment-EXPR for the loop must be | |
787 | provided. */ | |
788 | ||
789 | void | |
3a978d72 | 790 | finish_for_stmt (tree for_stmt) |
ad321293 | 791 | { |
325c3691 RH |
792 | FOR_BODY (for_stmt) = do_poplevel (FOR_BODY (for_stmt)); |
793 | ||
ad321293 | 794 | /* Pop the scope for the body of the loop. */ |
325c3691 RH |
795 | if (flag_new_for_scope > 0) |
796 | { | |
797 | tree scope = TREE_CHAIN (for_stmt); | |
798 | TREE_CHAIN (for_stmt) = NULL; | |
799 | add_stmt (do_poplevel (scope)); | |
800 | } | |
801 | ||
ad321293 MM |
802 | finish_stmt (); |
803 | } | |
804 | ||
805 | /* Finish a break-statement. */ | |
806 | ||
3e4d04a1 | 807 | tree |
3a978d72 | 808 | finish_break_stmt (void) |
ad321293 | 809 | { |
3e4d04a1 | 810 | return add_stmt (build_break_stmt ()); |
35b1567d BC |
811 | } |
812 | ||
ad321293 MM |
813 | /* Finish a continue-statement. */ |
814 | ||
3e4d04a1 | 815 | tree |
3a978d72 | 816 | finish_continue_stmt (void) |
ad321293 | 817 | { |
3e4d04a1 | 818 | return add_stmt (build_continue_stmt ()); |
ad321293 MM |
819 | } |
820 | ||
35b1567d BC |
821 | /* Begin a switch-statement. Returns a new SWITCH_STMT if |
822 | appropriate. */ | |
823 | ||
824 | tree | |
3a978d72 | 825 | begin_switch_stmt (void) |
35b1567d | 826 | { |
325c3691 RH |
827 | tree r, scope; |
828 | ||
6f9fdf4d | 829 | r = build_stmt (SWITCH_STMT, NULL_TREE, NULL_TREE, NULL_TREE); |
325c3691 RH |
830 | |
831 | scope = do_pushlevel (sk_block); | |
832 | TREE_CHAIN (r) = scope; | |
caf2523d | 833 | begin_cond (&SWITCH_COND (r)); |
325c3691 | 834 | |
527f0080 | 835 | return r; |
ad321293 MM |
836 | } |
837 | ||
527f0080 | 838 | /* Finish the cond of a switch-statement. */ |
ad321293 | 839 | |
527f0080 | 840 | void |
3a978d72 | 841 | finish_switch_cond (tree cond, tree switch_stmt) |
ad321293 | 842 | { |
6f9fdf4d | 843 | tree orig_type = NULL; |
35b1567d | 844 | if (!processing_template_decl) |
373eb3b3 | 845 | { |
56cb9733 MM |
846 | tree index; |
847 | ||
35b1567d | 848 | /* Convert the condition to an integer or enumeration type. */ |
b746c5dc | 849 | cond = build_expr_type_conversion (WANT_INT | WANT_ENUM, cond, true); |
35b1567d | 850 | if (cond == NULL_TREE) |
373eb3b3 | 851 | { |
35b1567d BC |
852 | error ("switch quantity not an integer"); |
853 | cond = error_mark_node; | |
854 | } | |
6f9fdf4d | 855 | orig_type = TREE_TYPE (cond); |
35b1567d BC |
856 | if (cond != error_mark_node) |
857 | { | |
0a72704b MM |
858 | /* [stmt.switch] |
859 | ||
860 | Integral promotions are performed. */ | |
861 | cond = perform_integral_promotions (cond); | |
543a0daa | 862 | cond = maybe_cleanup_point_expr (cond); |
373eb3b3 | 863 | } |
56cb9733 | 864 | |
25c8b645 JJ |
865 | if (cond != error_mark_node) |
866 | { | |
867 | index = get_unwidened (cond, NULL_TREE); | |
868 | /* We can't strip a conversion from a signed type to an unsigned, | |
869 | because if we did, int_fits_type_p would do the wrong thing | |
870 | when checking case values for being in range, | |
871 | and it's too hard to do the right thing. */ | |
8df83eae RK |
872 | if (TYPE_UNSIGNED (TREE_TYPE (cond)) |
873 | == TYPE_UNSIGNED (TREE_TYPE (index))) | |
25c8b645 JJ |
874 | cond = index; |
875 | } | |
ad321293 | 876 | } |
caf2523d | 877 | finish_cond (&SWITCH_COND (switch_stmt), cond); |
6f9fdf4d | 878 | SWITCH_TYPE (switch_stmt) = orig_type; |
caf2523d | 879 | add_stmt (switch_stmt); |
56cb9733 | 880 | push_switch (switch_stmt); |
325c3691 | 881 | SWITCH_BODY (switch_stmt) = push_stmt_list (); |
ad321293 MM |
882 | } |
883 | ||
884 | /* Finish the body of a switch-statement, which may be given by | |
885 | SWITCH_STMT. The COND to switch on is indicated. */ | |
886 | ||
887 | void | |
3a978d72 | 888 | finish_switch_stmt (tree switch_stmt) |
ad321293 | 889 | { |
325c3691 RH |
890 | tree scope; |
891 | ||
892 | SWITCH_BODY (switch_stmt) = pop_stmt_list (SWITCH_BODY (switch_stmt)); | |
ad321293 | 893 | pop_switch (); |
ad321293 | 894 | finish_stmt (); |
325c3691 RH |
895 | |
896 | scope = TREE_CHAIN (switch_stmt); | |
897 | TREE_CHAIN (switch_stmt) = NULL; | |
898 | add_stmt (do_poplevel (scope)); | |
ad321293 MM |
899 | } |
900 | ||
ad321293 MM |
901 | /* Begin a try-block. Returns a newly-created TRY_BLOCK if |
902 | appropriate. */ | |
903 | ||
904 | tree | |
3a978d72 | 905 | begin_try_block (void) |
ad321293 | 906 | { |
0dfdeca6 | 907 | tree r = build_stmt (TRY_BLOCK, NULL_TREE, NULL_TREE); |
ae499cce | 908 | add_stmt (r); |
325c3691 | 909 | TRY_STMTS (r) = push_stmt_list (); |
35b1567d | 910 | return r; |
ad321293 MM |
911 | } |
912 | ||
0dde4175 JM |
913 | /* Likewise, for a function-try-block. */ |
914 | ||
915 | tree | |
3a978d72 | 916 | begin_function_try_block (void) |
0dde4175 | 917 | { |
325c3691 | 918 | tree r = begin_try_block (); |
35b1567d | 919 | FN_TRY_BLOCK_P (r) = 1; |
35b1567d | 920 | return r; |
0dde4175 JM |
921 | } |
922 | ||
ad321293 MM |
923 | /* Finish a try-block, which may be given by TRY_BLOCK. */ |
924 | ||
925 | void | |
3a978d72 | 926 | finish_try_block (tree try_block) |
ad321293 | 927 | { |
325c3691 RH |
928 | TRY_STMTS (try_block) = pop_stmt_list (TRY_STMTS (try_block)); |
929 | TRY_HANDLERS (try_block) = push_stmt_list (); | |
ad321293 MM |
930 | } |
931 | ||
efa8eda3 MM |
932 | /* Finish the body of a cleanup try-block, which may be given by |
933 | TRY_BLOCK. */ | |
934 | ||
62409b39 | 935 | void |
3a978d72 | 936 | finish_cleanup_try_block (tree try_block) |
62409b39 | 937 | { |
325c3691 | 938 | TRY_STMTS (try_block) = pop_stmt_list (TRY_STMTS (try_block)); |
62409b39 MM |
939 | } |
940 | ||
f1dedc31 MM |
941 | /* Finish an implicitly generated try-block, with a cleanup is given |
942 | by CLEANUP. */ | |
943 | ||
944 | void | |
3a978d72 | 945 | finish_cleanup (tree cleanup, tree try_block) |
f1dedc31 | 946 | { |
35b1567d BC |
947 | TRY_HANDLERS (try_block) = cleanup; |
948 | CLEANUP_P (try_block) = 1; | |
f1dedc31 MM |
949 | } |
950 | ||
0dde4175 JM |
951 | /* Likewise, for a function-try-block. */ |
952 | ||
953 | void | |
3a978d72 | 954 | finish_function_try_block (tree try_block) |
0dde4175 | 955 | { |
325c3691 RH |
956 | finish_try_block (try_block); |
957 | /* FIXME : something queer about CTOR_INITIALIZER somehow following | |
958 | the try block, but moving it inside. */ | |
b35d4555 | 959 | in_function_try_handler = 1; |
0dde4175 JM |
960 | } |
961 | ||
ad321293 MM |
962 | /* Finish a handler-sequence for a try-block, which may be given by |
963 | TRY_BLOCK. */ | |
964 | ||
965 | void | |
3a978d72 | 966 | finish_handler_sequence (tree try_block) |
ad321293 | 967 | { |
325c3691 | 968 | TRY_HANDLERS (try_block) = pop_stmt_list (TRY_HANDLERS (try_block)); |
35b1567d | 969 | check_handlers (TRY_HANDLERS (try_block)); |
ad321293 MM |
970 | } |
971 | ||
0dde4175 JM |
972 | /* Likewise, for a function-try-block. */ |
973 | ||
974 | void | |
3a978d72 | 975 | finish_function_handler_sequence (tree try_block) |
0dde4175 | 976 | { |
b35d4555 | 977 | in_function_try_handler = 0; |
325c3691 | 978 | finish_handler_sequence (try_block); |
35b1567d BC |
979 | } |
980 | ||
ad321293 MM |
981 | /* Begin a handler. Returns a HANDLER if appropriate. */ |
982 | ||
983 | tree | |
3a978d72 | 984 | begin_handler (void) |
ad321293 MM |
985 | { |
986 | tree r; | |
325c3691 | 987 | |
0dfdeca6 | 988 | r = build_stmt (HANDLER, NULL_TREE, NULL_TREE); |
ae499cce | 989 | add_stmt (r); |
325c3691 | 990 | |
1a6025b4 JM |
991 | /* Create a binding level for the eh_info and the exception object |
992 | cleanup. */ | |
325c3691 RH |
993 | HANDLER_BODY (r) = do_pushlevel (sk_catch); |
994 | ||
ad321293 MM |
995 | return r; |
996 | } | |
997 | ||
998 | /* Finish the handler-parameters for a handler, which may be given by | |
b35d4555 MM |
999 | HANDLER. DECL is the declaration for the catch parameter, or NULL |
1000 | if this is a `catch (...)' clause. */ | |
ad321293 | 1001 | |
1a6025b4 | 1002 | void |
3a978d72 | 1003 | finish_handler_parms (tree decl, tree handler) |
b35d4555 | 1004 | { |
1a6025b4 | 1005 | tree type = NULL_TREE; |
b35d4555 MM |
1006 | if (processing_template_decl) |
1007 | { | |
1008 | if (decl) | |
1009 | { | |
1010 | decl = pushdecl (decl); | |
1011 | decl = push_template_decl (decl); | |
325c3691 | 1012 | HANDLER_PARMS (handler) = decl; |
1a6025b4 | 1013 | type = TREE_TYPE (decl); |
b35d4555 MM |
1014 | } |
1015 | } | |
35b1567d | 1016 | else |
1a6025b4 | 1017 | type = expand_start_catch_block (decl); |
35b1567d | 1018 | |
1a6025b4 | 1019 | HANDLER_TYPE (handler) = type; |
b80cfdcd | 1020 | if (!processing_template_decl && type) |
6cad4e17 | 1021 | mark_used (eh_type_info (type)); |
35b1567d BC |
1022 | } |
1023 | ||
1024 | /* Finish a handler, which may be given by HANDLER. The BLOCKs are | |
1025 | the return value from the matching call to finish_handler_parms. */ | |
1026 | ||
1027 | void | |
3a978d72 | 1028 | finish_handler (tree handler) |
35b1567d BC |
1029 | { |
1030 | if (!processing_template_decl) | |
1a6025b4 | 1031 | expand_end_catch_block (); |
325c3691 | 1032 | HANDLER_BODY (handler) = do_poplevel (HANDLER_BODY (handler)); |
35b1567d BC |
1033 | } |
1034 | ||
5882f0f3 RH |
1035 | /* Begin a compound statement. FLAGS contains some bits that control the |
1036 | behaviour and context. If BCS_NO_SCOPE is set, the compound statement | |
1037 | does not define a scope. If BCS_FN_BODY is set, this is the outermost | |
1038 | block of a function. If BCS_TRY_BLOCK is set, this is the block | |
1039 | created on behalf of a TRY statement. Returns a token to be passed to | |
1040 | finish_compound_stmt. */ | |
ad321293 MM |
1041 | |
1042 | tree | |
325c3691 | 1043 | begin_compound_stmt (unsigned int flags) |
ad321293 | 1044 | { |
325c3691 | 1045 | tree r; |
558475f0 | 1046 | |
325c3691 RH |
1047 | if (flags & BCS_NO_SCOPE) |
1048 | { | |
1049 | r = push_stmt_list (); | |
1050 | STATEMENT_LIST_NO_SCOPE (r) = 1; | |
1051 | ||
1052 | /* Normally, we try hard to keep the BLOCK for a statement-expression. | |
1053 | But, if it's a statement-expression with a scopeless block, there's | |
1054 | nothing to keep, and we don't want to accidentally keep a block | |
1055 | *inside* the scopeless block. */ | |
1056 | keep_next_level (false); | |
1057 | } | |
f1dedc31 | 1058 | else |
325c3691 RH |
1059 | r = do_pushlevel (flags & BCS_TRY_BLOCK ? sk_try : sk_block); |
1060 | ||
5882f0f3 RH |
1061 | /* When processing a template, we need to remember where the braces were, |
1062 | so that we can set up identical scopes when instantiating the template | |
1063 | later. BIND_EXPR is a handy candidate for this. | |
1064 | Note that do_poplevel won't create a BIND_EXPR itself here (and thus | |
1065 | result in nested BIND_EXPRs), since we don't build BLOCK nodes when | |
1066 | processing templates. */ | |
1067 | if (processing_template_decl) | |
325c3691 | 1068 | { |
5882f0f3 RH |
1069 | r = build (BIND_EXPR, NULL, NULL, r, NULL); |
1070 | BIND_EXPR_TRY_BLOCK (r) = (flags & BCS_TRY_BLOCK) != 0; | |
1071 | BIND_EXPR_BODY_BLOCK (r) = (flags & BCS_FN_BODY) != 0; | |
325c3691 RH |
1072 | TREE_SIDE_EFFECTS (r) = 1; |
1073 | } | |
ad321293 MM |
1074 | |
1075 | return r; | |
1076 | } | |
1077 | ||
5882f0f3 | 1078 | /* Finish a compound-statement, which is given by STMT. */ |
ad321293 | 1079 | |
325c3691 RH |
1080 | void |
1081 | finish_compound_stmt (tree stmt) | |
ad321293 | 1082 | { |
5882f0f3 RH |
1083 | if (TREE_CODE (stmt) == BIND_EXPR) |
1084 | BIND_EXPR_BODY (stmt) = do_poplevel (BIND_EXPR_BODY (stmt)); | |
325c3691 RH |
1085 | else if (STATEMENT_LIST_NO_SCOPE (stmt)) |
1086 | stmt = pop_stmt_list (stmt); | |
7a3397c7 | 1087 | else |
325c3691 | 1088 | stmt = do_poplevel (stmt); |
ad321293 | 1089 | |
325c3691 RH |
1090 | /* ??? See c_end_compound_stmt wrt statement expressions. */ |
1091 | add_stmt (stmt); | |
ad321293 | 1092 | finish_stmt (); |
ad321293 MM |
1093 | } |
1094 | ||
6de9cd9a DN |
1095 | /* Finish an asm-statement, whose components are a STRING, some |
1096 | OUTPUT_OPERANDS, some INPUT_OPERANDS, and some CLOBBERS. Also note | |
1097 | whether the asm-statement should be considered volatile. */ | |
7dc5bd62 | 1098 | |
3e4d04a1 | 1099 | tree |
6de9cd9a DN |
1100 | finish_asm_stmt (int volatile_p, tree string, tree output_operands, |
1101 | tree input_operands, tree clobbers) | |
35b1567d BC |
1102 | { |
1103 | tree r; | |
abfc8a36 MM |
1104 | tree t; |
1105 | ||
abfc8a36 | 1106 | if (!processing_template_decl) |
40b18c0a MM |
1107 | { |
1108 | int i; | |
1109 | int ninputs; | |
1110 | int noutputs; | |
1111 | ||
1112 | for (t = input_operands; t; t = TREE_CHAIN (t)) | |
1113 | { | |
1114 | tree converted_operand | |
1115 | = decay_conversion (TREE_VALUE (t)); | |
1116 | ||
1117 | /* If the type of the operand hasn't been determined (e.g., | |
1118 | because it involves an overloaded function), then issue | |
1119 | an error message. There's no context available to | |
1120 | resolve the overloading. */ | |
1121 | if (TREE_TYPE (converted_operand) == unknown_type_node) | |
1122 | { | |
33bd39a2 | 1123 | error ("type of asm operand `%E' could not be determined", |
40b18c0a MM |
1124 | TREE_VALUE (t)); |
1125 | converted_operand = error_mark_node; | |
1126 | } | |
1127 | TREE_VALUE (t) = converted_operand; | |
1128 | } | |
1129 | ||
1130 | ninputs = list_length (input_operands); | |
1131 | noutputs = list_length (output_operands); | |
1132 | ||
1133 | for (i = 0, t = output_operands; t; t = TREE_CHAIN (t), ++i) | |
1134 | { | |
1135 | bool allows_mem; | |
1136 | bool allows_reg; | |
1137 | bool is_inout; | |
1138 | const char *constraint; | |
1139 | tree operand; | |
1140 | ||
84b72302 | 1141 | constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); |
28c56d25 | 1142 | operand = TREE_VALUE (t); |
40b18c0a MM |
1143 | |
1144 | if (!parse_output_constraint (&constraint, | |
1145 | i, ninputs, noutputs, | |
1146 | &allows_mem, | |
1147 | &allows_reg, | |
1148 | &is_inout)) | |
1149 | { | |
a723baf1 MM |
1150 | /* By marking this operand as erroneous, we will not try |
1151 | to process this operand again in expand_asm_operands. */ | |
1152 | TREE_VALUE (t) = error_mark_node; | |
40b18c0a MM |
1153 | continue; |
1154 | } | |
1155 | ||
1156 | /* If the operand is a DECL that is going to end up in | |
1157 | memory, assume it is addressable. This is a bit more | |
1158 | conservative than it would ideally be; the exact test is | |
1159 | buried deep in expand_asm_operands and depends on the | |
1160 | DECL_RTL for the OPERAND -- which we don't have at this | |
1161 | point. */ | |
1162 | if (!allows_reg && DECL_P (operand)) | |
dffd7eb6 | 1163 | cxx_mark_addressable (operand); |
40b18c0a MM |
1164 | } |
1165 | } | |
abfc8a36 | 1166 | |
e130a54b | 1167 | r = build_stmt (ASM_EXPR, string, |
0dfdeca6 BC |
1168 | output_operands, input_operands, |
1169 | clobbers); | |
6de9cd9a | 1170 | ASM_VOLATILE_P (r) = volatile_p; |
3e4d04a1 | 1171 | return add_stmt (r); |
ad321293 | 1172 | } |
b4c4a9ec | 1173 | |
f01b0acb MM |
1174 | /* Finish a label with the indicated NAME. */ |
1175 | ||
a723baf1 | 1176 | tree |
3a978d72 | 1177 | finish_label_stmt (tree name) |
f01b0acb | 1178 | { |
5b030314 | 1179 | tree decl = define_label (input_location, name); |
9e14e18f | 1180 | return add_stmt (build_stmt (LABEL_EXPR, decl)); |
f01b0acb MM |
1181 | } |
1182 | ||
acef433b MM |
1183 | /* Finish a series of declarations for local labels. G++ allows users |
1184 | to declare "local" labels, i.e., labels with scope. This extension | |
1185 | is useful when writing code involving statement-expressions. */ | |
1186 | ||
1187 | void | |
3a978d72 | 1188 | finish_label_decl (tree name) |
acef433b MM |
1189 | { |
1190 | tree decl = declare_local_label (name); | |
350fae66 | 1191 | add_decl_expr (decl); |
acef433b MM |
1192 | } |
1193 | ||
659e5a7a | 1194 | /* When DECL goes out of scope, make sure that CLEANUP is executed. */ |
f1dedc31 MM |
1195 | |
1196 | void | |
3a978d72 | 1197 | finish_decl_cleanup (tree decl, tree cleanup) |
f1dedc31 | 1198 | { |
325c3691 | 1199 | push_cleanup (decl, cleanup, false); |
35b1567d BC |
1200 | } |
1201 | ||
659e5a7a | 1202 | /* If the current scope exits with an exception, run CLEANUP. */ |
24bef158 | 1203 | |
659e5a7a | 1204 | void |
3a978d72 | 1205 | finish_eh_cleanup (tree cleanup) |
24bef158 | 1206 | { |
325c3691 | 1207 | push_cleanup (NULL, cleanup, true); |
35b1567d BC |
1208 | } |
1209 | ||
2282d28d MM |
1210 | /* The MEM_INITS is a list of mem-initializers, in reverse of the |
1211 | order they were written by the user. Each node is as for | |
1212 | emit_mem_initializers. */ | |
bf3428d0 MM |
1213 | |
1214 | void | |
2282d28d | 1215 | finish_mem_initializers (tree mem_inits) |
bf3428d0 | 1216 | { |
2282d28d MM |
1217 | /* Reorder the MEM_INITS so that they are in the order they appeared |
1218 | in the source program. */ | |
1219 | mem_inits = nreverse (mem_inits); | |
bf3428d0 | 1220 | |
a0de9d20 | 1221 | if (processing_template_decl) |
2282d28d | 1222 | add_stmt (build_min_nt (CTOR_INITIALIZER, mem_inits)); |
cdd2559c | 1223 | else |
2282d28d | 1224 | emit_mem_initializers (mem_inits); |
558475f0 MM |
1225 | } |
1226 | ||
b4c4a9ec MM |
1227 | /* Finish a parenthesized expression EXPR. */ |
1228 | ||
1229 | tree | |
3a978d72 | 1230 | finish_parenthesized_expr (tree expr) |
b4c4a9ec MM |
1231 | { |
1232 | if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (expr)))) | |
78ef5b89 | 1233 | /* This inhibits warnings in c_common_truthvalue_conversion. */ |
31ec7d2f | 1234 | TREE_NO_WARNING (expr) = 1; |
b4c4a9ec | 1235 | |
19420d00 NS |
1236 | if (TREE_CODE (expr) == OFFSET_REF) |
1237 | /* [expr.unary.op]/3 The qualified id of a pointer-to-member must not be | |
1238 | enclosed in parentheses. */ | |
1239 | PTRMEM_OK_P (expr) = 0; | |
b4c4a9ec MM |
1240 | return expr; |
1241 | } | |
1242 | ||
a723baf1 MM |
1243 | /* Finish a reference to a non-static data member (DECL) that is not |
1244 | preceded by `.' or `->'. */ | |
1245 | ||
1246 | tree | |
a3f10e50 | 1247 | finish_non_static_data_member (tree decl, tree object, tree qualifying_scope) |
a723baf1 MM |
1248 | { |
1249 | my_friendly_assert (TREE_CODE (decl) == FIELD_DECL, 20020909); | |
1250 | ||
a3f10e50 | 1251 | if (!object) |
a723baf1 MM |
1252 | { |
1253 | if (current_function_decl | |
1254 | && DECL_STATIC_FUNCTION_P (current_function_decl)) | |
1255 | cp_error_at ("invalid use of member `%D' in static member function", | |
1256 | decl); | |
1257 | else | |
1258 | cp_error_at ("invalid use of non-static data member `%D'", decl); | |
1259 | error ("from this location"); | |
1260 | ||
1261 | return error_mark_node; | |
1262 | } | |
1263 | TREE_USED (current_class_ptr) = 1; | |
58e1d54c | 1264 | if (processing_template_decl && !qualifying_scope) |
a723baf1 | 1265 | { |
a3f10e50 | 1266 | tree type = TREE_TYPE (decl); |
a723baf1 | 1267 | |
a3f10e50 NS |
1268 | if (TREE_CODE (type) == REFERENCE_TYPE) |
1269 | type = TREE_TYPE (type); | |
1270 | else | |
1271 | { | |
f4f206f4 | 1272 | /* Set the cv qualifiers. */ |
a3f10e50 NS |
1273 | int quals = cp_type_quals (TREE_TYPE (current_class_ref)); |
1274 | ||
1275 | if (DECL_MUTABLE_P (decl)) | |
1276 | quals &= ~TYPE_QUAL_CONST; | |
9e95d15f | 1277 | |
a3f10e50 NS |
1278 | quals |= cp_type_quals (TREE_TYPE (decl)); |
1279 | type = cp_build_qualified_type (type, quals); | |
1280 | } | |
9e95d15f | 1281 | |
44de5aeb | 1282 | return build_min (COMPONENT_REF, type, object, decl, NULL_TREE); |
a3f10e50 NS |
1283 | } |
1284 | else | |
1285 | { | |
1286 | tree access_type = TREE_TYPE (object); | |
1287 | tree lookup_context = context_for_name_lookup (decl); | |
1288 | ||
1289 | while (!DERIVED_FROM_P (lookup_context, access_type)) | |
a723baf1 MM |
1290 | { |
1291 | access_type = TYPE_CONTEXT (access_type); | |
9f01ded6 | 1292 | while (access_type && DECL_P (access_type)) |
a723baf1 | 1293 | access_type = DECL_CONTEXT (access_type); |
a723baf1 | 1294 | |
a3f10e50 NS |
1295 | if (!access_type) |
1296 | { | |
1297 | cp_error_at ("object missing in reference to `%D'", decl); | |
1298 | error ("from this location"); | |
1299 | return error_mark_node; | |
1300 | } | |
9f01ded6 KL |
1301 | } |
1302 | ||
5c425df5 | 1303 | /* If PROCESSING_TEMPLATE_DECL is nonzero here, then |
58e1d54c KL |
1304 | QUALIFYING_SCOPE is also non-null. Wrap this in a SCOPE_REF |
1305 | for now. */ | |
1306 | if (processing_template_decl) | |
1307 | return build_min (SCOPE_REF, TREE_TYPE (decl), | |
1308 | qualifying_scope, DECL_NAME (decl)); | |
1309 | ||
6df5158a | 1310 | perform_or_defer_access_check (TYPE_BINFO (access_type), decl); |
a723baf1 MM |
1311 | |
1312 | /* If the data member was named `C::M', convert `*this' to `C' | |
1313 | first. */ | |
1314 | if (qualifying_scope) | |
1315 | { | |
1316 | tree binfo = NULL_TREE; | |
1317 | object = build_scoped_ref (object, qualifying_scope, | |
1318 | &binfo); | |
1319 | } | |
1320 | ||
1321 | return build_class_member_access_expr (object, decl, | |
1322 | /*access_path=*/NULL_TREE, | |
1323 | /*preserve_reference=*/false); | |
1324 | } | |
1325 | } | |
1326 | ||
ee76b931 MM |
1327 | /* DECL was the declaration to which a qualified-id resolved. Issue |
1328 | an error message if it is not accessible. If OBJECT_TYPE is | |
1329 | non-NULL, we have just seen `x->' or `x.' and OBJECT_TYPE is the | |
1330 | type of `*x', or `x', respectively. If the DECL was named as | |
1331 | `A::B' then NESTED_NAME_SPECIFIER is `A'. */ | |
1332 | ||
1333 | void | |
1334 | check_accessibility_of_qualified_id (tree decl, | |
1335 | tree object_type, | |
1336 | tree nested_name_specifier) | |
1337 | { | |
1338 | tree scope; | |
1339 | tree qualifying_type = NULL_TREE; | |
95b4aca6 NS |
1340 | |
1341 | /* If we're not checking, return imediately. */ | |
1342 | if (deferred_access_no_check) | |
1343 | return; | |
ee76b931 MM |
1344 | |
1345 | /* Determine the SCOPE of DECL. */ | |
1346 | scope = context_for_name_lookup (decl); | |
1347 | /* If the SCOPE is not a type, then DECL is not a member. */ | |
1348 | if (!TYPE_P (scope)) | |
1349 | return; | |
1350 | /* Compute the scope through which DECL is being accessed. */ | |
1351 | if (object_type | |
1352 | /* OBJECT_TYPE might not be a class type; consider: | |
1353 | ||
1354 | class A { typedef int I; }; | |
1355 | I *p; | |
1356 | p->A::I::~I(); | |
1357 | ||
1358 | In this case, we will have "A::I" as the DECL, but "I" as the | |
1359 | OBJECT_TYPE. */ | |
1360 | && CLASS_TYPE_P (object_type) | |
1361 | && DERIVED_FROM_P (scope, object_type)) | |
1362 | /* If we are processing a `->' or `.' expression, use the type of the | |
1363 | left-hand side. */ | |
1364 | qualifying_type = object_type; | |
1365 | else if (nested_name_specifier) | |
1366 | { | |
1367 | /* If the reference is to a non-static member of the | |
1368 | current class, treat it as if it were referenced through | |
1369 | `this'. */ | |
1370 | if (DECL_NONSTATIC_MEMBER_P (decl) | |
1371 | && current_class_ptr | |
1372 | && DERIVED_FROM_P (scope, current_class_type)) | |
1373 | qualifying_type = current_class_type; | |
1374 | /* Otherwise, use the type indicated by the | |
1375 | nested-name-specifier. */ | |
1376 | else | |
1377 | qualifying_type = nested_name_specifier; | |
1378 | } | |
1379 | else | |
1380 | /* Otherwise, the name must be from the current class or one of | |
1381 | its bases. */ | |
1382 | qualifying_type = currently_open_derived_class (scope); | |
1383 | ||
1384 | if (qualifying_type) | |
1385 | perform_or_defer_access_check (TYPE_BINFO (qualifying_type), decl); | |
1386 | } | |
1387 | ||
1388 | /* EXPR is the result of a qualified-id. The QUALIFYING_CLASS was the | |
1389 | class named to the left of the "::" operator. DONE is true if this | |
1390 | expression is a complete postfix-expression; it is false if this | |
1391 | expression is followed by '->', '[', '(', etc. ADDRESS_P is true | |
1392 | iff this expression is the operand of '&'. */ | |
1393 | ||
1394 | tree | |
1395 | finish_qualified_id_expr (tree qualifying_class, tree expr, bool done, | |
1396 | bool address_p) | |
1397 | { | |
5e08432e MM |
1398 | if (error_operand_p (expr)) |
1399 | return error_mark_node; | |
1400 | ||
ee76b931 MM |
1401 | /* If EXPR occurs as the operand of '&', use special handling that |
1402 | permits a pointer-to-member. */ | |
1403 | if (address_p && done) | |
1404 | { | |
1405 | if (TREE_CODE (expr) == SCOPE_REF) | |
1406 | expr = TREE_OPERAND (expr, 1); | |
a5ac359a MM |
1407 | expr = build_offset_ref (qualifying_class, expr, |
1408 | /*address_p=*/true); | |
ee76b931 MM |
1409 | return expr; |
1410 | } | |
1411 | ||
1412 | if (TREE_CODE (expr) == FIELD_DECL) | |
a3f10e50 NS |
1413 | expr = finish_non_static_data_member (expr, current_class_ref, |
1414 | qualifying_class); | |
ee76b931 MM |
1415 | else if (BASELINK_P (expr) && !processing_template_decl) |
1416 | { | |
1417 | tree fn; | |
1418 | tree fns; | |
1419 | ||
1420 | /* See if any of the functions are non-static members. */ | |
1421 | fns = BASELINK_FUNCTIONS (expr); | |
1422 | if (TREE_CODE (fns) == TEMPLATE_ID_EXPR) | |
1423 | fns = TREE_OPERAND (fns, 0); | |
1424 | for (fn = fns; fn; fn = OVL_NEXT (fn)) | |
1425 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fn)) | |
1426 | break; | |
1427 | /* If so, the expression may be relative to the current | |
1428 | class. */ | |
1429 | if (fn && current_class_type | |
1430 | && DERIVED_FROM_P (qualifying_class, current_class_type)) | |
1431 | expr = (build_class_member_access_expr | |
1432 | (maybe_dummy_object (qualifying_class, NULL), | |
1433 | expr, | |
1434 | BASELINK_ACCESS_BINFO (expr), | |
1435 | /*preserve_reference=*/false)); | |
1436 | else if (done) | |
a5ac359a MM |
1437 | /* The expression is a qualified name whose address is not |
1438 | being taken. */ | |
1439 | expr = build_offset_ref (qualifying_class, expr, /*address_p=*/false); | |
ee76b931 MM |
1440 | } |
1441 | ||
1442 | return expr; | |
1443 | } | |
1444 | ||
b69b1501 MM |
1445 | /* Begin a statement-expression. The value returned must be passed to |
1446 | finish_stmt_expr. */ | |
b4c4a9ec MM |
1447 | |
1448 | tree | |
3a978d72 | 1449 | begin_stmt_expr (void) |
b4c4a9ec | 1450 | { |
325c3691 | 1451 | return push_stmt_list (); |
35b1567d BC |
1452 | } |
1453 | ||
a5bcc582 NS |
1454 | /* Process the final expression of a statement expression. EXPR can be |
1455 | NULL, if the final expression is empty. Build up a TARGET_EXPR so | |
1456 | that the result value can be safely returned to the enclosing | |
1457 | expression. */ | |
1458 | ||
1459 | tree | |
325c3691 | 1460 | finish_stmt_expr_expr (tree expr, tree stmt_expr) |
a5bcc582 NS |
1461 | { |
1462 | tree result = NULL_TREE; | |
a5bcc582 NS |
1463 | |
1464 | if (expr) | |
1465 | { | |
a5bcc582 NS |
1466 | if (!processing_template_decl && !VOID_TYPE_P (TREE_TYPE (expr))) |
1467 | { | |
2692eb7d JM |
1468 | tree type = TREE_TYPE (expr); |
1469 | ||
a5bcc582 NS |
1470 | if (TREE_CODE (type) == ARRAY_TYPE |
1471 | || TREE_CODE (type) == FUNCTION_TYPE) | |
1472 | expr = decay_conversion (expr); | |
1473 | ||
1474 | expr = convert_from_reference (expr); | |
1475 | expr = require_complete_type (expr); | |
1476 | ||
2692eb7d JM |
1477 | type = TREE_TYPE (expr); |
1478 | ||
a5bcc582 NS |
1479 | /* Build a TARGET_EXPR for this aggregate. finish_stmt_expr |
1480 | will then pull it apart so the lifetime of the target is | |
cd0be382 | 1481 | within the scope of the expression containing this statement |
a5bcc582 NS |
1482 | expression. */ |
1483 | if (TREE_CODE (expr) == TARGET_EXPR) | |
1484 | ; | |
1485 | else if (!IS_AGGR_TYPE (type) || TYPE_HAS_TRIVIAL_INIT_REF (type)) | |
1486 | expr = build_target_expr_with_type (expr, type); | |
1487 | else | |
1488 | { | |
1489 | /* Copy construct. */ | |
1490 | expr = build_special_member_call | |
1491 | (NULL_TREE, complete_ctor_identifier, | |
1492 | build_tree_list (NULL_TREE, expr), | |
cad7e87b | 1493 | type, LOOKUP_NORMAL); |
a5bcc582 NS |
1494 | expr = build_cplus_new (type, expr); |
1495 | my_friendly_assert (TREE_CODE (expr) == TARGET_EXPR, 20030729); | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | if (expr != error_mark_node) | |
1500 | { | |
1501 | result = build_stmt (EXPR_STMT, expr); | |
325c3691 | 1502 | EXPR_STMT_STMT_EXPR_RESULT (result) = 1; |
a5bcc582 NS |
1503 | add_stmt (result); |
1504 | } | |
1505 | } | |
1506 | ||
1507 | finish_stmt (); | |
1508 | ||
325c3691 RH |
1509 | /* Remember the last expression so that finish_stmt_expr |
1510 | can pull it apart. */ | |
1511 | TREE_TYPE (stmt_expr) = result; | |
a5bcc582 NS |
1512 | |
1513 | return result; | |
1514 | } | |
1515 | ||
303b7406 NS |
1516 | /* Finish a statement-expression. EXPR should be the value returned |
1517 | by the previous begin_stmt_expr. Returns an expression | |
1518 | representing the statement-expression. */ | |
b4c4a9ec MM |
1519 | |
1520 | tree | |
325c3691 | 1521 | finish_stmt_expr (tree stmt_expr, bool has_no_scope) |
b4c4a9ec | 1522 | { |
325c3691 RH |
1523 | tree result, result_stmt, type; |
1524 | tree *result_stmt_p = NULL; | |
1525 | ||
1526 | result_stmt = TREE_TYPE (stmt_expr); | |
1527 | TREE_TYPE (stmt_expr) = void_type_node; | |
1528 | result = pop_stmt_list (stmt_expr); | |
1529 | ||
1530 | if (!result_stmt || VOID_TYPE_P (result_stmt)) | |
a5bcc582 NS |
1531 | type = void_type_node; |
1532 | else | |
1533 | { | |
325c3691 RH |
1534 | /* We need to search the statement expression for the result_stmt, |
1535 | since we'll need to replace it entirely. */ | |
1536 | tree t; | |
1537 | result_stmt_p = &result; | |
1538 | while (1) | |
a5bcc582 | 1539 | { |
325c3691 RH |
1540 | t = *result_stmt_p; |
1541 | if (t == result_stmt) | |
1542 | break; | |
1543 | ||
1544 | switch (TREE_CODE (t)) | |
1545 | { | |
1546 | case STATEMENT_LIST: | |
1547 | { | |
1548 | tree_stmt_iterator i = tsi_last (t); | |
1549 | result_stmt_p = tsi_stmt_ptr (i); | |
1550 | break; | |
1551 | } | |
1552 | case BIND_EXPR: | |
1553 | result_stmt_p = &BIND_EXPR_BODY (t); | |
1554 | break; | |
325c3691 RH |
1555 | case TRY_FINALLY_EXPR: |
1556 | case TRY_CATCH_EXPR: | |
1557 | case CLEANUP_STMT: | |
1558 | result_stmt_p = &TREE_OPERAND (t, 0); | |
1559 | break; | |
1560 | default: | |
1561 | abort (); | |
1562 | } | |
a5bcc582 | 1563 | } |
325c3691 | 1564 | type = TREE_TYPE (EXPR_STMT_EXPR (result_stmt)); |
a5bcc582 | 1565 | } |
6f80451c | 1566 | |
a5bcc582 | 1567 | if (processing_template_decl) |
325c3691 RH |
1568 | { |
1569 | result = build_min (STMT_EXPR, type, result); | |
1570 | TREE_SIDE_EFFECTS (result) = 1; | |
1571 | STMT_EXPR_NO_SCOPE (result) = has_no_scope; | |
1572 | } | |
1573 | else if (!VOID_TYPE_P (type)) | |
a5bcc582 NS |
1574 | { |
1575 | /* Pull out the TARGET_EXPR that is the final expression. Put | |
1576 | the target's init_expr as the final expression and then put | |
1577 | the statement expression itself as the target's init | |
1578 | expr. Finally, return the target expression. */ | |
2692eb7d JM |
1579 | tree init, target_expr = EXPR_STMT_EXPR (result_stmt); |
1580 | my_friendly_assert (TREE_CODE (target_expr) == TARGET_EXPR, 20030729); | |
1581 | ||
1582 | /* The initializer will be void if the initialization is done by | |
1583 | AGGR_INIT_EXPR; propagate that out to the statement-expression as | |
1584 | a whole. */ | |
1585 | init = TREE_OPERAND (target_expr, 1); | |
1586 | type = TREE_TYPE (init); | |
1587 | ||
543a0daa | 1588 | init = maybe_cleanup_point_expr (init); |
2692eb7d JM |
1589 | *result_stmt_p = init; |
1590 | ||
1591 | if (VOID_TYPE_P (type)) | |
1592 | /* No frobbing needed. */; | |
1593 | else if (TREE_CODE (result) == BIND_EXPR) | |
325c3691 | 1594 | { |
2692eb7d JM |
1595 | /* The BIND_EXPR created in finish_compound_stmt is void; if we're |
1596 | returning a value directly, give it the appropriate type. */ | |
325c3691 | 1597 | if (VOID_TYPE_P (TREE_TYPE (result))) |
2692eb7d JM |
1598 | TREE_TYPE (result) = type; |
1599 | else if (same_type_p (TREE_TYPE (result), type)) | |
325c3691 RH |
1600 | ; |
1601 | else | |
1602 | abort (); | |
1603 | } | |
1604 | else if (TREE_CODE (result) == STATEMENT_LIST) | |
2692eb7d JM |
1605 | /* We need to wrap a STATEMENT_LIST in a BIND_EXPR so it can have a |
1606 | type other than void. FIXME why can't we just return a value | |
1607 | from STATEMENT_LIST? */ | |
1608 | result = build3 (BIND_EXPR, type, NULL, result, NULL); | |
325c3691 | 1609 | |
2692eb7d JM |
1610 | TREE_OPERAND (target_expr, 1) = result; |
1611 | result = target_expr; | |
a5bcc582 | 1612 | } |
325c3691 | 1613 | |
b4c4a9ec MM |
1614 | return result; |
1615 | } | |
1616 | ||
b3445994 | 1617 | /* Perform Koenig lookup. FN is the postfix-expression representing |
fa531100 MM |
1618 | the function (or functions) to call; ARGS are the arguments to the |
1619 | call. Returns the functions to be considered by overload | |
1620 | resolution. */ | |
b3445994 MM |
1621 | |
1622 | tree | |
1623 | perform_koenig_lookup (tree fn, tree args) | |
1624 | { | |
1625 | tree identifier = NULL_TREE; | |
1626 | tree functions = NULL_TREE; | |
1627 | ||
1628 | /* Find the name of the overloaded function. */ | |
1629 | if (TREE_CODE (fn) == IDENTIFIER_NODE) | |
1630 | identifier = fn; | |
1631 | else if (is_overloaded_fn (fn)) | |
1632 | { | |
1633 | functions = fn; | |
1634 | identifier = DECL_NAME (get_first_fn (functions)); | |
1635 | } | |
1636 | else if (DECL_P (fn)) | |
1637 | { | |
1638 | functions = fn; | |
1639 | identifier = DECL_NAME (fn); | |
1640 | } | |
1641 | ||
1642 | /* A call to a namespace-scope function using an unqualified name. | |
1643 | ||
1644 | Do Koenig lookup -- unless any of the arguments are | |
1645 | type-dependent. */ | |
1646 | if (!any_type_dependent_arguments_p (args)) | |
1647 | { | |
1648 | fn = lookup_arg_dependent (identifier, functions, args); | |
1649 | if (!fn) | |
1650 | /* The unqualified name could not be resolved. */ | |
1651 | fn = unqualified_fn_lookup_error (identifier); | |
1652 | } | |
1653 | else | |
10b1d5e7 | 1654 | fn = identifier; |
b3445994 MM |
1655 | |
1656 | return fn; | |
1657 | } | |
1658 | ||
4ba126e4 MM |
1659 | /* Generate an expression for `FN (ARGS)'. |
1660 | ||
1661 | If DISALLOW_VIRTUAL is true, the call to FN will be not generated | |
1662 | as a virtual call, even if FN is virtual. (This flag is set when | |
1663 | encountering an expression where the function name is explicitly | |
1664 | qualified. For example a call to `X::f' never generates a virtual | |
1665 | call.) | |
1666 | ||
1667 | Returns code for the call. */ | |
b4c4a9ec MM |
1668 | |
1669 | tree | |
6d80c4b9 | 1670 | finish_call_expr (tree fn, tree args, bool disallow_virtual, bool koenig_p) |
b4c4a9ec | 1671 | { |
d17811fd MM |
1672 | tree result; |
1673 | tree orig_fn; | |
1674 | tree orig_args; | |
1675 | ||
4ba126e4 MM |
1676 | if (fn == error_mark_node || args == error_mark_node) |
1677 | return error_mark_node; | |
1678 | ||
4ba126e4 MM |
1679 | /* ARGS should be a list of arguments. */ |
1680 | my_friendly_assert (!args || TREE_CODE (args) == TREE_LIST, | |
1681 | 20020712); | |
a759e627 | 1682 | |
d17811fd MM |
1683 | orig_fn = fn; |
1684 | orig_args = args; | |
1685 | ||
1686 | if (processing_template_decl) | |
1687 | { | |
1688 | if (type_dependent_expression_p (fn) | |
1689 | || any_type_dependent_arguments_p (args)) | |
6d80c4b9 | 1690 | { |
6de9cd9a | 1691 | result = build_nt (CALL_EXPR, fn, args, NULL_TREE); |
6d80c4b9 MM |
1692 | KOENIG_LOOKUP_P (result) = koenig_p; |
1693 | return result; | |
1694 | } | |
d17811fd MM |
1695 | if (!BASELINK_P (fn) |
1696 | && TREE_CODE (fn) != PSEUDO_DTOR_EXPR | |
1697 | && TREE_TYPE (fn) != unknown_type_node) | |
1698 | fn = build_non_dependent_expr (fn); | |
1699 | args = build_non_dependent_args (orig_args); | |
1700 | } | |
1701 | ||
a723baf1 MM |
1702 | /* A reference to a member function will appear as an overloaded |
1703 | function (rather than a BASELINK) if an unqualified name was used | |
1704 | to refer to it. */ | |
1705 | if (!BASELINK_P (fn) && is_overloaded_fn (fn)) | |
1706 | { | |
12483c9f | 1707 | tree f = fn; |
a723baf1 | 1708 | |
12483c9f NS |
1709 | if (TREE_CODE (f) == TEMPLATE_ID_EXPR) |
1710 | f = TREE_OPERAND (f, 0); | |
1711 | f = get_first_fn (f); | |
a723baf1 MM |
1712 | if (DECL_FUNCTION_MEMBER_P (f)) |
1713 | { | |
1714 | tree type = currently_open_derived_class (DECL_CONTEXT (f)); | |
c44e68a5 KL |
1715 | if (!type) |
1716 | type = DECL_CONTEXT (f); | |
a723baf1 MM |
1717 | fn = build_baselink (TYPE_BINFO (type), |
1718 | TYPE_BINFO (type), | |
1719 | fn, /*optype=*/NULL_TREE); | |
1720 | } | |
1721 | } | |
1722 | ||
d17811fd | 1723 | result = NULL_TREE; |
4ba126e4 | 1724 | if (BASELINK_P (fn)) |
03d82991 | 1725 | { |
4ba126e4 MM |
1726 | tree object; |
1727 | ||
1728 | /* A call to a member function. From [over.call.func]: | |
1729 | ||
1730 | If the keyword this is in scope and refers to the class of | |
1731 | that member function, or a derived class thereof, then the | |
1732 | function call is transformed into a qualified function call | |
1733 | using (*this) as the postfix-expression to the left of the | |
1734 | . operator.... [Otherwise] a contrived object of type T | |
1735 | becomes the implied object argument. | |
1736 | ||
1737 | This paragraph is unclear about this situation: | |
1738 | ||
1739 | struct A { void f(); }; | |
1740 | struct B : public A {}; | |
1741 | struct C : public A { void g() { B::f(); }}; | |
1742 | ||
1743 | In particular, for `B::f', this paragraph does not make clear | |
1744 | whether "the class of that member function" refers to `A' or | |
1745 | to `B'. We believe it refers to `B'. */ | |
1746 | if (current_class_type | |
1747 | && DERIVED_FROM_P (BINFO_TYPE (BASELINK_ACCESS_BINFO (fn)), | |
1748 | current_class_type) | |
1749 | && current_class_ref) | |
127b8136 MM |
1750 | object = maybe_dummy_object (BINFO_TYPE (BASELINK_ACCESS_BINFO (fn)), |
1751 | NULL); | |
4ba126e4 MM |
1752 | else |
1753 | { | |
1754 | tree representative_fn; | |
b4c4a9ec | 1755 | |
4ba126e4 MM |
1756 | representative_fn = BASELINK_FUNCTIONS (fn); |
1757 | if (TREE_CODE (representative_fn) == TEMPLATE_ID_EXPR) | |
1758 | representative_fn = TREE_OPERAND (representative_fn, 0); | |
1759 | representative_fn = get_first_fn (representative_fn); | |
1760 | object = build_dummy_object (DECL_CONTEXT (representative_fn)); | |
1761 | } | |
b4c4a9ec | 1762 | |
d17811fd MM |
1763 | if (processing_template_decl) |
1764 | { | |
1765 | if (type_dependent_expression_p (object)) | |
6de9cd9a | 1766 | return build_nt (CALL_EXPR, orig_fn, orig_args, NULL_TREE); |
d17811fd MM |
1767 | object = build_non_dependent_expr (object); |
1768 | } | |
1769 | ||
1770 | result = build_new_method_call (object, fn, args, NULL_TREE, | |
1771 | (disallow_virtual | |
1772 | ? LOOKUP_NONVIRTUAL : 0)); | |
4ba126e4 MM |
1773 | } |
1774 | else if (is_overloaded_fn (fn)) | |
1775 | /* A call to a namespace-scope function. */ | |
d17811fd | 1776 | result = build_new_function_call (fn, args); |
a723baf1 MM |
1777 | else if (TREE_CODE (fn) == PSEUDO_DTOR_EXPR) |
1778 | { | |
a723baf1 MM |
1779 | if (args) |
1780 | error ("arguments to destructor are not allowed"); | |
1781 | /* Mark the pseudo-destructor call as having side-effects so | |
1782 | that we do not issue warnings about its use. */ | |
1783 | result = build1 (NOP_EXPR, | |
1784 | void_type_node, | |
1785 | TREE_OPERAND (fn, 0)); | |
1786 | TREE_SIDE_EFFECTS (result) = 1; | |
a723baf1 | 1787 | } |
4ba126e4 | 1788 | else if (CLASS_TYPE_P (TREE_TYPE (fn))) |
d17811fd MM |
1789 | /* If the "function" is really an object of class type, it might |
1790 | have an overloaded `operator ()'. */ | |
ec835fb2 MM |
1791 | result = build_new_op (CALL_EXPR, LOOKUP_NORMAL, fn, args, NULL_TREE, |
1792 | /*overloaded_p=*/NULL); | |
d17811fd MM |
1793 | if (!result) |
1794 | /* A call where the function is unknown. */ | |
1795 | result = build_function_call (fn, args); | |
4ba126e4 | 1796 | |
d17811fd | 1797 | if (processing_template_decl) |
6d80c4b9 | 1798 | { |
6de9cd9a DN |
1799 | result = build (CALL_EXPR, TREE_TYPE (result), orig_fn, |
1800 | orig_args, NULL_TREE); | |
6d80c4b9 MM |
1801 | KOENIG_LOOKUP_P (result) = koenig_p; |
1802 | } | |
d17811fd | 1803 | return result; |
b4c4a9ec MM |
1804 | } |
1805 | ||
1806 | /* Finish a call to a postfix increment or decrement or EXPR. (Which | |
1807 | is indicated by CODE, which should be POSTINCREMENT_EXPR or | |
1808 | POSTDECREMENT_EXPR.) */ | |
1809 | ||
1810 | tree | |
3a978d72 | 1811 | finish_increment_expr (tree expr, enum tree_code code) |
b4c4a9ec | 1812 | { |
b4c4a9ec MM |
1813 | return build_x_unary_op (code, expr); |
1814 | } | |
1815 | ||
1816 | /* Finish a use of `this'. Returns an expression for `this'. */ | |
1817 | ||
1818 | tree | |
3a978d72 | 1819 | finish_this_expr (void) |
b4c4a9ec MM |
1820 | { |
1821 | tree result; | |
1822 | ||
1823 | if (current_class_ptr) | |
1824 | { | |
b4c4a9ec MM |
1825 | result = current_class_ptr; |
1826 | } | |
1827 | else if (current_function_decl | |
1828 | && DECL_STATIC_FUNCTION_P (current_function_decl)) | |
1829 | { | |
8251199e | 1830 | error ("`this' is unavailable for static member functions"); |
b4c4a9ec MM |
1831 | result = error_mark_node; |
1832 | } | |
1833 | else | |
1834 | { | |
1835 | if (current_function_decl) | |
8251199e | 1836 | error ("invalid use of `this' in non-member function"); |
b4c4a9ec | 1837 | else |
8251199e | 1838 | error ("invalid use of `this' at top level"); |
b4c4a9ec MM |
1839 | result = error_mark_node; |
1840 | } | |
1841 | ||
1842 | return result; | |
1843 | } | |
1844 | ||
a723baf1 MM |
1845 | /* Finish a pseudo-destructor expression. If SCOPE is NULL, the |
1846 | expression was of the form `OBJECT.~DESTRUCTOR' where DESTRUCTOR is | |
1847 | the TYPE for the type given. If SCOPE is non-NULL, the expression | |
1848 | was of the form `OBJECT.SCOPE::~DESTRUCTOR'. */ | |
b4c4a9ec MM |
1849 | |
1850 | tree | |
3a978d72 | 1851 | finish_pseudo_destructor_expr (tree object, tree scope, tree destructor) |
b4c4a9ec | 1852 | { |
a723baf1 MM |
1853 | if (destructor == error_mark_node) |
1854 | return error_mark_node; | |
40242ccf | 1855 | |
a723baf1 | 1856 | my_friendly_assert (TYPE_P (destructor), 20010905); |
b4c4a9ec | 1857 | |
a723baf1 MM |
1858 | if (!processing_template_decl) |
1859 | { | |
1860 | if (scope == error_mark_node) | |
1861 | { | |
1862 | error ("invalid qualifying scope in pseudo-destructor name"); | |
1863 | return error_mark_node; | |
1864 | } | |
1865 | ||
26bcf8fc MM |
1866 | /* [expr.pseudo] says both: |
1867 | ||
1868 | The type designated by the pseudo-destructor-name shall be | |
1869 | the same as the object type. | |
1870 | ||
1871 | and: | |
1872 | ||
1873 | The cv-unqualified versions of the object type and of the | |
1874 | type designated by the pseudo-destructor-name shall be the | |
1875 | same type. | |
1876 | ||
1877 | We implement the more generous second sentence, since that is | |
1878 | what most other compilers do. */ | |
1879 | if (!same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (object), | |
1880 | destructor)) | |
a723baf1 MM |
1881 | { |
1882 | error ("`%E' is not of type `%T'", object, destructor); | |
1883 | return error_mark_node; | |
1884 | } | |
1885 | } | |
b4c4a9ec | 1886 | |
a723baf1 | 1887 | return build (PSEUDO_DTOR_EXPR, void_type_node, object, scope, destructor); |
b4c4a9ec MM |
1888 | } |
1889 | ||
ce4a0391 MM |
1890 | /* Finish an expression of the form CODE EXPR. */ |
1891 | ||
1892 | tree | |
3a978d72 | 1893 | finish_unary_op_expr (enum tree_code code, tree expr) |
ce4a0391 MM |
1894 | { |
1895 | tree result = build_x_unary_op (code, expr); | |
7c355bca ML |
1896 | /* Inside a template, build_x_unary_op does not fold the |
1897 | expression. So check whether the result is folded before | |
1898 | setting TREE_NEGATED_INT. */ | |
1899 | if (code == NEGATE_EXPR && TREE_CODE (expr) == INTEGER_CST | |
88b4335f | 1900 | && TREE_CODE (result) == INTEGER_CST |
8df83eae | 1901 | && !TYPE_UNSIGNED (TREE_TYPE (result)) |
88b4335f | 1902 | && INT_CST_LT (result, integer_zero_node)) |
ce4a0391 MM |
1903 | TREE_NEGATED_INT (result) = 1; |
1904 | overflow_warning (result); | |
1905 | return result; | |
1906 | } | |
1907 | ||
a723baf1 MM |
1908 | /* Finish a compound-literal expression. TYPE is the type to which |
1909 | the INITIALIZER_LIST is being cast. */ | |
1910 | ||
1911 | tree | |
3a978d72 | 1912 | finish_compound_literal (tree type, tree initializer_list) |
a723baf1 MM |
1913 | { |
1914 | tree compound_literal; | |
1915 | ||
1916 | /* Build a CONSTRUCTOR for the INITIALIZER_LIST. */ | |
dcf92453 | 1917 | compound_literal = build_constructor (NULL_TREE, initializer_list); |
a723baf1 MM |
1918 | /* Mark it as a compound-literal. */ |
1919 | TREE_HAS_CONSTRUCTOR (compound_literal) = 1; | |
1920 | if (processing_template_decl) | |
1921 | TREE_TYPE (compound_literal) = type; | |
1922 | else | |
1923 | { | |
1924 | /* Check the initialization. */ | |
1925 | compound_literal = digest_init (type, compound_literal, NULL); | |
1926 | /* If the TYPE was an array type with an unknown bound, then we can | |
1927 | figure out the dimension now. For example, something like: | |
1928 | ||
1929 | `(int []) { 2, 3 }' | |
1930 | ||
1931 | implies that the array has two elements. */ | |
1932 | if (TREE_CODE (type) == ARRAY_TYPE && !COMPLETE_TYPE_P (type)) | |
1933 | complete_array_type (type, compound_literal, 1); | |
1934 | } | |
1935 | ||
1936 | return compound_literal; | |
1937 | } | |
1938 | ||
5f261ba9 MM |
1939 | /* Return the declaration for the function-name variable indicated by |
1940 | ID. */ | |
1941 | ||
1942 | tree | |
1943 | finish_fname (tree id) | |
1944 | { | |
1945 | tree decl; | |
1946 | ||
1947 | decl = fname_decl (C_RID_CODE (id), id); | |
1948 | if (processing_template_decl) | |
10b1d5e7 | 1949 | decl = DECL_NAME (decl); |
5f261ba9 MM |
1950 | return decl; |
1951 | } | |
1952 | ||
8014a339 | 1953 | /* Finish a translation unit. */ |
ce4a0391 MM |
1954 | |
1955 | void | |
3a978d72 | 1956 | finish_translation_unit (void) |
ce4a0391 MM |
1957 | { |
1958 | /* In case there were missing closebraces, | |
1959 | get us back to the global binding level. */ | |
273a708f | 1960 | pop_everything (); |
ce4a0391 MM |
1961 | while (current_namespace != global_namespace) |
1962 | pop_namespace (); | |
0ba8a114 | 1963 | |
c6002625 | 1964 | /* Do file scope __FUNCTION__ et al. */ |
0ba8a114 | 1965 | finish_fname_decls (); |
ce4a0391 MM |
1966 | } |
1967 | ||
b4c4a9ec MM |
1968 | /* Finish a template type parameter, specified as AGGR IDENTIFIER. |
1969 | Returns the parameter. */ | |
1970 | ||
1971 | tree | |
3a978d72 | 1972 | finish_template_type_parm (tree aggr, tree identifier) |
b4c4a9ec | 1973 | { |
6eabb241 | 1974 | if (aggr != class_type_node) |
b4c4a9ec | 1975 | { |
8251199e | 1976 | pedwarn ("template type parameters must use the keyword `class' or `typename'"); |
b4c4a9ec MM |
1977 | aggr = class_type_node; |
1978 | } | |
1979 | ||
1980 | return build_tree_list (aggr, identifier); | |
1981 | } | |
1982 | ||
1983 | /* Finish a template template parameter, specified as AGGR IDENTIFIER. | |
1984 | Returns the parameter. */ | |
1985 | ||
1986 | tree | |
3a978d72 | 1987 | finish_template_template_parm (tree aggr, tree identifier) |
b4c4a9ec MM |
1988 | { |
1989 | tree decl = build_decl (TYPE_DECL, identifier, NULL_TREE); | |
1990 | tree tmpl = build_lang_decl (TEMPLATE_DECL, identifier, NULL_TREE); | |
1991 | DECL_TEMPLATE_PARMS (tmpl) = current_template_parms; | |
1992 | DECL_TEMPLATE_RESULT (tmpl) = decl; | |
c727aa5e | 1993 | DECL_ARTIFICIAL (decl) = 1; |
b4c4a9ec MM |
1994 | end_template_decl (); |
1995 | ||
b37bf5bd NS |
1996 | my_friendly_assert (DECL_TEMPLATE_PARMS (tmpl), 20010110); |
1997 | ||
b4c4a9ec MM |
1998 | return finish_template_type_parm (aggr, tmpl); |
1999 | } | |
ce4a0391 | 2000 | |
8ba658ee MM |
2001 | /* ARGUMENT is the default-argument value for a template template |
2002 | parameter. If ARGUMENT is invalid, issue error messages and return | |
2003 | the ERROR_MARK_NODE. Otherwise, ARGUMENT itself is returned. */ | |
2004 | ||
2005 | tree | |
2006 | check_template_template_default_arg (tree argument) | |
2007 | { | |
2008 | if (TREE_CODE (argument) != TEMPLATE_DECL | |
2009 | && TREE_CODE (argument) != TEMPLATE_TEMPLATE_PARM | |
8ba658ee MM |
2010 | && TREE_CODE (argument) != UNBOUND_CLASS_TEMPLATE) |
2011 | { | |
a3a503a5 GB |
2012 | if (TREE_CODE (argument) == TYPE_DECL) |
2013 | { | |
2014 | tree t = TREE_TYPE (argument); | |
2015 | ||
2016 | /* Try to emit a slightly smarter error message if we detect | |
2017 | that the user is using a template instantiation. */ | |
2018 | if (CLASSTYPE_TEMPLATE_INFO (t) | |
2019 | && CLASSTYPE_TEMPLATE_INSTANTIATION (t)) | |
2020 | error ("invalid use of type `%T' as a default value for a " | |
2021 | "template template-parameter", t); | |
2022 | else | |
2023 | error ("invalid use of `%D' as a default value for a template " | |
2024 | "template-parameter", argument); | |
2025 | } | |
2026 | else | |
2027 | error ("invalid default argument for a template template parameter"); | |
8ba658ee MM |
2028 | return error_mark_node; |
2029 | } | |
2030 | ||
2031 | return argument; | |
2032 | } | |
2033 | ||
ce4a0391 MM |
2034 | /* Begin a class definition, as indicated by T. */ |
2035 | ||
2036 | tree | |
3a978d72 | 2037 | begin_class_definition (tree t) |
ce4a0391 | 2038 | { |
7437519c ZW |
2039 | if (t == error_mark_node) |
2040 | return error_mark_node; | |
2041 | ||
522d6614 NS |
2042 | if (processing_template_parmlist) |
2043 | { | |
33bd39a2 | 2044 | error ("definition of `%#T' inside template parameter list", t); |
522d6614 NS |
2045 | return error_mark_node; |
2046 | } | |
47ee8904 MM |
2047 | /* A non-implicit typename comes from code like: |
2048 | ||
2049 | template <typename T> struct A { | |
2050 | template <typename U> struct A<T>::B ... | |
2051 | ||
2052 | This is erroneous. */ | |
2053 | else if (TREE_CODE (t) == TYPENAME_TYPE) | |
2054 | { | |
33bd39a2 | 2055 | error ("invalid definition of qualified type `%T'", t); |
47ee8904 MM |
2056 | t = error_mark_node; |
2057 | } | |
2058 | ||
2059 | if (t == error_mark_node || ! IS_AGGR_TYPE (t)) | |
ce4a0391 | 2060 | { |
33848bb0 | 2061 | t = make_aggr_type (RECORD_TYPE); |
ce4a0391 MM |
2062 | pushtag (make_anon_name (), t, 0); |
2063 | } | |
830fcda8 | 2064 | |
4c571114 MM |
2065 | /* If this type was already complete, and we see another definition, |
2066 | that's an error. */ | |
8fbc5ae7 | 2067 | if (COMPLETE_TYPE_P (t)) |
4223f82f MM |
2068 | { |
2069 | error ("redefinition of `%#T'", t); | |
2070 | cp_error_at ("previous definition of `%#T'", t); | |
2071 | return error_mark_node; | |
2072 | } | |
4c571114 | 2073 | |
b4f70b3d | 2074 | /* Update the location of the decl. */ |
f31686a3 | 2075 | DECL_SOURCE_LOCATION (TYPE_NAME (t)) = input_location; |
b4f70b3d | 2076 | |
4c571114 | 2077 | if (TYPE_BEING_DEFINED (t)) |
ce4a0391 | 2078 | { |
33848bb0 | 2079 | t = make_aggr_type (TREE_CODE (t)); |
ce4a0391 | 2080 | pushtag (TYPE_IDENTIFIER (t), t, 0); |
ce4a0391 | 2081 | } |
ff350acd | 2082 | maybe_process_partial_specialization (t); |
29370796 | 2083 | pushclass (t); |
ce4a0391 | 2084 | TYPE_BEING_DEFINED (t) = 1; |
c0694c4b MM |
2085 | if (flag_pack_struct) |
2086 | { | |
2087 | tree v; | |
2088 | TYPE_PACKED (t) = 1; | |
2089 | /* Even though the type is being defined for the first time | |
2090 | here, there might have been a forward declaration, so there | |
2091 | might be cv-qualified variants of T. */ | |
2092 | for (v = TYPE_NEXT_VARIANT (t); v; v = TYPE_NEXT_VARIANT (v)) | |
2093 | TYPE_PACKED (v) = 1; | |
2094 | } | |
ce4a0391 MM |
2095 | /* Reset the interface data, at the earliest possible |
2096 | moment, as it might have been set via a class foo; | |
2097 | before. */ | |
1951a1b6 JM |
2098 | if (! TYPE_ANONYMOUS_P (t)) |
2099 | { | |
2100 | CLASSTYPE_INTERFACE_ONLY (t) = interface_only; | |
2101 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X | |
2102 | (t, interface_unknown); | |
2103 | } | |
ce4a0391 MM |
2104 | reset_specialization(); |
2105 | ||
b7975aed MM |
2106 | /* Make a declaration for this class in its own scope. */ |
2107 | build_self_reference (); | |
2108 | ||
830fcda8 | 2109 | return t; |
ce4a0391 MM |
2110 | } |
2111 | ||
61a127b3 MM |
2112 | /* Finish the member declaration given by DECL. */ |
2113 | ||
2114 | void | |
3a978d72 | 2115 | finish_member_declaration (tree decl) |
61a127b3 MM |
2116 | { |
2117 | if (decl == error_mark_node || decl == NULL_TREE) | |
2118 | return; | |
2119 | ||
2120 | if (decl == void_type_node) | |
2121 | /* The COMPONENT was a friend, not a member, and so there's | |
2122 | nothing for us to do. */ | |
2123 | return; | |
2124 | ||
2125 | /* We should see only one DECL at a time. */ | |
2126 | my_friendly_assert (TREE_CHAIN (decl) == NULL_TREE, 0); | |
2127 | ||
2128 | /* Set up access control for DECL. */ | |
2129 | TREE_PRIVATE (decl) | |
2130 | = (current_access_specifier == access_private_node); | |
2131 | TREE_PROTECTED (decl) | |
2132 | = (current_access_specifier == access_protected_node); | |
2133 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
2134 | { | |
17aec3eb RK |
2135 | TREE_PRIVATE (DECL_TEMPLATE_RESULT (decl)) = TREE_PRIVATE (decl); |
2136 | TREE_PROTECTED (DECL_TEMPLATE_RESULT (decl)) = TREE_PROTECTED (decl); | |
61a127b3 MM |
2137 | } |
2138 | ||
2139 | /* Mark the DECL as a member of the current class. */ | |
4f1c5b7d | 2140 | DECL_CONTEXT (decl) = current_class_type; |
61a127b3 | 2141 | |
421844e7 MM |
2142 | /* [dcl.link] |
2143 | ||
2144 | A C language linkage is ignored for the names of class members | |
2145 | and the member function type of class member functions. */ | |
2146 | if (DECL_LANG_SPECIFIC (decl) && DECL_LANGUAGE (decl) == lang_c) | |
5d2ed28c | 2147 | SET_DECL_LANGUAGE (decl, lang_cplusplus); |
421844e7 | 2148 | |
61a127b3 MM |
2149 | /* Put functions on the TYPE_METHODS list and everything else on the |
2150 | TYPE_FIELDS list. Note that these are built up in reverse order. | |
2151 | We reverse them (to obtain declaration order) in finish_struct. */ | |
2152 | if (TREE_CODE (decl) == FUNCTION_DECL | |
2153 | || DECL_FUNCTION_TEMPLATE_P (decl)) | |
2154 | { | |
2155 | /* We also need to add this function to the | |
2156 | CLASSTYPE_METHOD_VEC. */ | |
aaaa46d2 | 2157 | add_method (current_class_type, decl); |
61a127b3 MM |
2158 | |
2159 | TREE_CHAIN (decl) = TYPE_METHODS (current_class_type); | |
2160 | TYPE_METHODS (current_class_type) = decl; | |
f139561c MM |
2161 | |
2162 | maybe_add_class_template_decl_list (current_class_type, decl, | |
2163 | /*friend_p=*/0); | |
61a127b3 | 2164 | } |
f139561c | 2165 | /* Enter the DECL into the scope of the class. */ |
fd9aef9d | 2166 | else if ((TREE_CODE (decl) == USING_DECL && TREE_TYPE (decl)) |
399dedb9 | 2167 | || pushdecl_class_level (decl)) |
61a127b3 MM |
2168 | { |
2169 | /* All TYPE_DECLs go at the end of TYPE_FIELDS. Ordinary fields | |
2170 | go at the beginning. The reason is that lookup_field_1 | |
2171 | searches the list in order, and we want a field name to | |
2172 | override a type name so that the "struct stat hack" will | |
2173 | work. In particular: | |
2174 | ||
2175 | struct S { enum E { }; int E } s; | |
2176 | s.E = 3; | |
2177 | ||
0e339752 | 2178 | is valid. In addition, the FIELD_DECLs must be maintained in |
61a127b3 MM |
2179 | declaration order so that class layout works as expected. |
2180 | However, we don't need that order until class layout, so we | |
2181 | save a little time by putting FIELD_DECLs on in reverse order | |
2182 | here, and then reversing them in finish_struct_1. (We could | |
2183 | also keep a pointer to the correct insertion points in the | |
2184 | list.) */ | |
2185 | ||
2186 | if (TREE_CODE (decl) == TYPE_DECL) | |
2187 | TYPE_FIELDS (current_class_type) | |
2188 | = chainon (TYPE_FIELDS (current_class_type), decl); | |
2189 | else | |
2190 | { | |
2191 | TREE_CHAIN (decl) = TYPE_FIELDS (current_class_type); | |
2192 | TYPE_FIELDS (current_class_type) = decl; | |
2193 | } | |
8f032717 | 2194 | |
f139561c MM |
2195 | maybe_add_class_template_decl_list (current_class_type, decl, |
2196 | /*friend_p=*/0); | |
61a127b3 MM |
2197 | } |
2198 | } | |
2199 | ||
306ef644 | 2200 | /* Finish processing a complete template declaration. The PARMS are |
36a117a5 MM |
2201 | the template parameters. */ |
2202 | ||
2203 | void | |
3a978d72 | 2204 | finish_template_decl (tree parms) |
36a117a5 MM |
2205 | { |
2206 | if (parms) | |
2207 | end_template_decl (); | |
2208 | else | |
2209 | end_specialization (); | |
2210 | } | |
2211 | ||
509fc277 | 2212 | /* Finish processing a template-id (which names a type) of the form |
36a117a5 | 2213 | NAME < ARGS >. Return the TYPE_DECL for the type named by the |
838dfd8a | 2214 | template-id. If ENTERING_SCOPE is nonzero we are about to enter |
36a117a5 MM |
2215 | the scope of template-id indicated. */ |
2216 | ||
2217 | tree | |
3a978d72 | 2218 | finish_template_type (tree name, tree args, int entering_scope) |
36a117a5 MM |
2219 | { |
2220 | tree decl; | |
2221 | ||
2222 | decl = lookup_template_class (name, args, | |
42eaed49 NS |
2223 | NULL_TREE, NULL_TREE, entering_scope, |
2224 | tf_error | tf_warning | tf_user); | |
36a117a5 MM |
2225 | if (decl != error_mark_node) |
2226 | decl = TYPE_STUB_DECL (decl); | |
2227 | ||
2228 | return decl; | |
2229 | } | |
648f19f6 | 2230 | |
ea6021e8 MM |
2231 | /* Finish processing a BASE_CLASS with the indicated ACCESS_SPECIFIER. |
2232 | Return a TREE_LIST containing the ACCESS_SPECIFIER and the | |
2233 | BASE_CLASS, or NULL_TREE if an error occurred. The | |
aba649ba | 2234 | ACCESS_SPECIFIER is one of |
809e3e7f NS |
2235 | access_{default,public,protected_private}_node. For a virtual base |
2236 | we set TREE_TYPE. */ | |
ea6021e8 MM |
2237 | |
2238 | tree | |
dbbf88d1 | 2239 | finish_base_specifier (tree base, tree access, bool virtual_p) |
ea6021e8 | 2240 | { |
ea6021e8 MM |
2241 | tree result; |
2242 | ||
dbbf88d1 | 2243 | if (base == error_mark_node) |
acb044ee GDR |
2244 | { |
2245 | error ("invalid base-class specification"); | |
2246 | result = NULL_TREE; | |
2247 | } | |
dbbf88d1 | 2248 | else if (! is_aggr_type (base, 1)) |
ea6021e8 | 2249 | result = NULL_TREE; |
ea6021e8 | 2250 | else |
bb92901d | 2251 | { |
dbbf88d1 | 2252 | if (cp_type_quals (base) != 0) |
bb92901d | 2253 | { |
dbbf88d1 NS |
2254 | error ("base class `%T' has cv qualifiers", base); |
2255 | base = TYPE_MAIN_VARIANT (base); | |
bb92901d | 2256 | } |
dbbf88d1 | 2257 | result = build_tree_list (access, base); |
809e3e7f NS |
2258 | if (virtual_p) |
2259 | TREE_TYPE (result) = integer_type_node; | |
bb92901d | 2260 | } |
ea6021e8 MM |
2261 | |
2262 | return result; | |
2263 | } | |
61a127b3 MM |
2264 | |
2265 | /* Called when multiple declarators are processed. If that is not | |
cd0be382 | 2266 | permitted in this context, an error is issued. */ |
61a127b3 MM |
2267 | |
2268 | void | |
3a978d72 | 2269 | check_multiple_declarators (void) |
61a127b3 MM |
2270 | { |
2271 | /* [temp] | |
2272 | ||
2273 | In a template-declaration, explicit specialization, or explicit | |
2274 | instantiation the init-declarator-list in the declaration shall | |
2275 | contain at most one declarator. | |
2276 | ||
2277 | We don't just use PROCESSING_TEMPLATE_DECL for the first | |
0e339752 | 2278 | condition since that would disallow the perfectly valid code, |
61a127b3 | 2279 | like `template <class T> struct S { int i, j; };'. */ |
5f261ba9 | 2280 | if (at_function_scope_p ()) |
61a127b3 MM |
2281 | /* It's OK to write `template <class T> void f() { int i, j;}'. */ |
2282 | return; | |
2283 | ||
2284 | if (PROCESSING_REAL_TEMPLATE_DECL_P () | |
2285 | || processing_explicit_instantiation | |
2286 | || processing_specialization) | |
33bd39a2 | 2287 | error ("multiple declarators in template declaration"); |
61a127b3 MM |
2288 | } |
2289 | ||
22038b2c NS |
2290 | /* Issue a diagnostic that NAME cannot be found in SCOPE. */ |
2291 | ||
2292 | void | |
2293 | qualified_name_lookup_error (tree scope, tree name) | |
2294 | { | |
2295 | if (TYPE_P (scope)) | |
2296 | { | |
2297 | if (!COMPLETE_TYPE_P (scope)) | |
2298 | error ("incomplete type `%T' used in nested name specifier", scope); | |
2299 | else | |
2300 | error ("`%D' is not a member of `%T'", name, scope); | |
2301 | } | |
2302 | else if (scope != global_namespace) | |
2303 | error ("`%D' is not a member of `%D'", name, scope); | |
2304 | else | |
2305 | error ("`::%D' has not been declared", name); | |
2306 | } | |
2307 | ||
b3445994 MM |
2308 | /* ID_EXPRESSION is a representation of parsed, but unprocessed, |
2309 | id-expression. (See cp_parser_id_expression for details.) SCOPE, | |
2310 | if non-NULL, is the type or namespace used to explicitly qualify | |
2311 | ID_EXPRESSION. DECL is the entity to which that name has been | |
2312 | resolved. | |
2313 | ||
2314 | *CONSTANT_EXPRESSION_P is true if we are presently parsing a | |
2315 | constant-expression. In that case, *NON_CONSTANT_EXPRESSION_P will | |
2316 | be set to true if this expression isn't permitted in a | |
2317 | constant-expression, but it is otherwise not set by this function. | |
2318 | *ALLOW_NON_CONSTANT_EXPRESSION_P is true if we are parsing a | |
2319 | constant-expression, but a non-constant expression is also | |
2320 | permissible. | |
2321 | ||
2322 | If an error occurs, and it is the kind of error that might cause | |
2323 | the parser to abort a tentative parse, *ERROR_MSG is filled in. It | |
2324 | is the caller's responsibility to issue the message. *ERROR_MSG | |
2325 | will be a string with static storage duration, so the caller need | |
2326 | not "free" it. | |
2327 | ||
2328 | Return an expression for the entity, after issuing appropriate | |
2329 | diagnostics. This function is also responsible for transforming a | |
2330 | reference to a non-static member into a COMPONENT_REF that makes | |
2331 | the use of "this" explicit. | |
2332 | ||
2333 | Upon return, *IDK will be filled in appropriately. */ | |
2334 | ||
2335 | tree | |
2336 | finish_id_expression (tree id_expression, | |
2337 | tree decl, | |
2338 | tree scope, | |
2339 | cp_id_kind *idk, | |
2340 | tree *qualifying_class, | |
67c03833 JM |
2341 | bool integral_constant_expression_p, |
2342 | bool allow_non_integral_constant_expression_p, | |
2343 | bool *non_integral_constant_expression_p, | |
b3445994 MM |
2344 | const char **error_msg) |
2345 | { | |
2346 | /* Initialize the output parameters. */ | |
2347 | *idk = CP_ID_KIND_NONE; | |
2348 | *error_msg = NULL; | |
2349 | ||
2350 | if (id_expression == error_mark_node) | |
2351 | return error_mark_node; | |
2352 | /* If we have a template-id, then no further lookup is | |
2353 | required. If the template-id was for a template-class, we | |
2354 | will sometimes have a TYPE_DECL at this point. */ | |
2355 | else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
ee935db4 | 2356 | || TREE_CODE (decl) == TYPE_DECL) |
b3445994 MM |
2357 | ; |
2358 | /* Look up the name. */ | |
2359 | else | |
2360 | { | |
2361 | if (decl == error_mark_node) | |
2362 | { | |
2363 | /* Name lookup failed. */ | |
4546865e MM |
2364 | if (scope |
2365 | && (!TYPE_P (scope) | |
2366 | || (!dependent_type_p (scope) | |
2367 | && !(TREE_CODE (id_expression) == IDENTIFIER_NODE | |
2368 | && IDENTIFIER_TYPENAME_P (id_expression) | |
2369 | && dependent_type_p (TREE_TYPE (id_expression)))))) | |
b3445994 | 2370 | { |
4546865e MM |
2371 | /* If the qualifying type is non-dependent (and the name |
2372 | does not name a conversion operator to a dependent | |
2373 | type), issue an error. */ | |
22038b2c | 2374 | qualified_name_lookup_error (scope, id_expression); |
b3445994 MM |
2375 | return error_mark_node; |
2376 | } | |
2377 | else if (!scope) | |
2378 | { | |
2379 | /* It may be resolved via Koenig lookup. */ | |
2380 | *idk = CP_ID_KIND_UNQUALIFIED; | |
2381 | return id_expression; | |
2382 | } | |
4546865e MM |
2383 | else |
2384 | decl = id_expression; | |
b3445994 MM |
2385 | } |
2386 | /* If DECL is a variable that would be out of scope under | |
2387 | ANSI/ISO rules, but in scope in the ARM, name lookup | |
2388 | will succeed. Issue a diagnostic here. */ | |
2389 | else | |
2390 | decl = check_for_out_of_scope_variable (decl); | |
2391 | ||
2392 | /* Remember that the name was used in the definition of | |
2393 | the current class so that we can check later to see if | |
2394 | the meaning would have been different after the class | |
2395 | was entirely defined. */ | |
2396 | if (!scope && decl != error_mark_node) | |
2397 | maybe_note_name_used_in_class (id_expression, decl); | |
2398 | } | |
2399 | ||
2400 | /* If we didn't find anything, or what we found was a type, | |
2401 | then this wasn't really an id-expression. */ | |
2402 | if (TREE_CODE (decl) == TEMPLATE_DECL | |
2403 | && !DECL_FUNCTION_TEMPLATE_P (decl)) | |
2404 | { | |
2405 | *error_msg = "missing template arguments"; | |
2406 | return error_mark_node; | |
2407 | } | |
2408 | else if (TREE_CODE (decl) == TYPE_DECL | |
2409 | || TREE_CODE (decl) == NAMESPACE_DECL) | |
2410 | { | |
2411 | *error_msg = "expected primary-expression"; | |
2412 | return error_mark_node; | |
2413 | } | |
2414 | ||
2415 | /* If the name resolved to a template parameter, there is no | |
931a9c05 GB |
2416 | need to look it up again later. */ |
2417 | if ((TREE_CODE (decl) == CONST_DECL && DECL_TEMPLATE_PARM_P (decl)) | |
2418 | || TREE_CODE (decl) == TEMPLATE_PARM_INDEX) | |
b3445994 MM |
2419 | { |
2420 | *idk = CP_ID_KIND_NONE; | |
931a9c05 GB |
2421 | if (TREE_CODE (decl) == TEMPLATE_PARM_INDEX) |
2422 | decl = TEMPLATE_PARM_DECL (decl); | |
67c03833 | 2423 | if (integral_constant_expression_p |
68deab91 | 2424 | && !dependent_type_p (TREE_TYPE (decl)) |
931a9c05 GB |
2425 | && !INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (decl))) |
2426 | { | |
67c03833 | 2427 | if (!allow_non_integral_constant_expression_p) |
931a9c05 GB |
2428 | error ("template parameter `%D' of type `%T' is not allowed in " |
2429 | "an integral constant expression because it is not of " | |
2430 | "integral or enumeration type", decl, TREE_TYPE (decl)); | |
67c03833 | 2431 | *non_integral_constant_expression_p = true; |
931a9c05 GB |
2432 | } |
2433 | return DECL_INITIAL (decl); | |
2434 | } | |
2435 | /* Similarly, we resolve enumeration constants to their | |
2436 | underlying values. */ | |
2437 | else if (TREE_CODE (decl) == CONST_DECL) | |
2438 | { | |
2439 | *idk = CP_ID_KIND_NONE; | |
2440 | if (!processing_template_decl) | |
b3445994 MM |
2441 | return DECL_INITIAL (decl); |
2442 | return decl; | |
2443 | } | |
2444 | else | |
2445 | { | |
2446 | bool dependent_p; | |
2447 | ||
2448 | /* If the declaration was explicitly qualified indicate | |
2449 | that. The semantics of `A::f(3)' are different than | |
2450 | `f(3)' if `f' is virtual. */ | |
2451 | *idk = (scope | |
2452 | ? CP_ID_KIND_QUALIFIED | |
2453 | : (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
2454 | ? CP_ID_KIND_TEMPLATE_ID | |
2455 | : CP_ID_KIND_UNQUALIFIED)); | |
2456 | ||
2457 | ||
2458 | /* [temp.dep.expr] | |
2459 | ||
2460 | An id-expression is type-dependent if it contains an | |
2461 | identifier that was declared with a dependent type. | |
2462 | ||
b3445994 MM |
2463 | The standard is not very specific about an id-expression that |
2464 | names a set of overloaded functions. What if some of them | |
2465 | have dependent types and some of them do not? Presumably, | |
2466 | such a name should be treated as a dependent name. */ | |
2467 | /* Assume the name is not dependent. */ | |
2468 | dependent_p = false; | |
2469 | if (!processing_template_decl) | |
2470 | /* No names are dependent outside a template. */ | |
2471 | ; | |
2472 | /* A template-id where the name of the template was not resolved | |
2473 | is definitely dependent. */ | |
2474 | else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
2475 | && (TREE_CODE (TREE_OPERAND (decl, 0)) | |
2476 | == IDENTIFIER_NODE)) | |
2477 | dependent_p = true; | |
2478 | /* For anything except an overloaded function, just check its | |
2479 | type. */ | |
2480 | else if (!is_overloaded_fn (decl)) | |
2481 | dependent_p | |
2482 | = dependent_type_p (TREE_TYPE (decl)); | |
2483 | /* For a set of overloaded functions, check each of the | |
2484 | functions. */ | |
2485 | else | |
2486 | { | |
2487 | tree fns = decl; | |
2488 | ||
2489 | if (BASELINK_P (fns)) | |
2490 | fns = BASELINK_FUNCTIONS (fns); | |
2491 | ||
2492 | /* For a template-id, check to see if the template | |
2493 | arguments are dependent. */ | |
2494 | if (TREE_CODE (fns) == TEMPLATE_ID_EXPR) | |
2495 | { | |
2496 | tree args = TREE_OPERAND (fns, 1); | |
2497 | dependent_p = any_dependent_template_arguments_p (args); | |
2498 | /* The functions are those referred to by the | |
2499 | template-id. */ | |
2500 | fns = TREE_OPERAND (fns, 0); | |
2501 | } | |
2502 | ||
2503 | /* If there are no dependent template arguments, go through | |
cd0be382 | 2504 | the overloaded functions. */ |
b3445994 MM |
2505 | while (fns && !dependent_p) |
2506 | { | |
2507 | tree fn = OVL_CURRENT (fns); | |
2508 | ||
2509 | /* Member functions of dependent classes are | |
2510 | dependent. */ | |
2511 | if (TREE_CODE (fn) == FUNCTION_DECL | |
2512 | && type_dependent_expression_p (fn)) | |
2513 | dependent_p = true; | |
2514 | else if (TREE_CODE (fn) == TEMPLATE_DECL | |
2515 | && dependent_template_p (fn)) | |
2516 | dependent_p = true; | |
2517 | ||
2518 | fns = OVL_NEXT (fns); | |
2519 | } | |
2520 | } | |
2521 | ||
2522 | /* If the name was dependent on a template parameter, we will | |
2523 | resolve the name at instantiation time. */ | |
2524 | if (dependent_p) | |
2525 | { | |
2526 | /* Create a SCOPE_REF for qualified names, if the scope is | |
2527 | dependent. */ | |
2528 | if (scope) | |
2529 | { | |
2530 | if (TYPE_P (scope)) | |
2531 | *qualifying_class = scope; | |
2532 | /* Since this name was dependent, the expression isn't | |
2533 | constant -- yet. No error is issued because it might | |
2534 | be constant when things are instantiated. */ | |
67c03833 JM |
2535 | if (integral_constant_expression_p) |
2536 | *non_integral_constant_expression_p = true; | |
b3445994 MM |
2537 | if (TYPE_P (scope) && dependent_type_p (scope)) |
2538 | return build_nt (SCOPE_REF, scope, id_expression); | |
2539 | else if (TYPE_P (scope) && DECL_P (decl)) | |
2540 | return build (SCOPE_REF, TREE_TYPE (decl), scope, | |
2541 | id_expression); | |
2542 | else | |
2543 | return decl; | |
2544 | } | |
2545 | /* A TEMPLATE_ID already contains all the information we | |
2546 | need. */ | |
2547 | if (TREE_CODE (id_expression) == TEMPLATE_ID_EXPR) | |
2548 | return id_expression; | |
2549 | /* Since this name was dependent, the expression isn't | |
2550 | constant -- yet. No error is issued because it might be | |
2551 | constant when things are instantiated. */ | |
67c03833 JM |
2552 | if (integral_constant_expression_p) |
2553 | *non_integral_constant_expression_p = true; | |
10b1d5e7 | 2554 | *idk = CP_ID_KIND_UNQUALIFIED_DEPENDENT; |
5a98fa7b MM |
2555 | /* If we found a variable, then name lookup during the |
2556 | instantiation will always resolve to the same VAR_DECL | |
2557 | (or an instantiation thereof). */ | |
3c398f34 MM |
2558 | if (TREE_CODE (decl) == VAR_DECL |
2559 | || TREE_CODE (decl) == PARM_DECL) | |
5a98fa7b | 2560 | return decl; |
10b1d5e7 | 2561 | return id_expression; |
b3445994 MM |
2562 | } |
2563 | ||
2564 | /* Only certain kinds of names are allowed in constant | |
931a9c05 GB |
2565 | expression. Enumerators and template parameters |
2566 | have already been handled above. */ | |
67c03833 | 2567 | if (integral_constant_expression_p) |
b3445994 | 2568 | { |
931a9c05 GB |
2569 | /* Const variables or static data members of integral or |
2570 | enumeration types initialized with constant expressions | |
2571 | are OK. */ | |
2572 | if (TREE_CODE (decl) == VAR_DECL | |
2573 | && CP_TYPE_CONST_P (TREE_TYPE (decl)) | |
2574 | && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (decl)) | |
2575 | && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl)) | |
b3445994 MM |
2576 | ; |
2577 | else | |
2578 | { | |
67c03833 | 2579 | if (!allow_non_integral_constant_expression_p) |
b3445994 MM |
2580 | { |
2581 | error ("`%D' cannot appear in a constant-expression", decl); | |
2582 | return error_mark_node; | |
2583 | } | |
67c03833 | 2584 | *non_integral_constant_expression_p = true; |
b3445994 MM |
2585 | } |
2586 | } | |
415d4636 MM |
2587 | |
2588 | if (TREE_CODE (decl) == NAMESPACE_DECL) | |
9e95d15f NS |
2589 | { |
2590 | error ("use of namespace `%D' as expression", decl); | |
2591 | return error_mark_node; | |
2592 | } | |
2593 | else if (DECL_CLASS_TEMPLATE_P (decl)) | |
2594 | { | |
2595 | error ("use of class template `%T' as expression", decl); | |
2596 | return error_mark_node; | |
2597 | } | |
2598 | else if (TREE_CODE (decl) == TREE_LIST) | |
2599 | { | |
2600 | /* Ambiguous reference to base members. */ | |
2601 | error ("request for member `%D' is ambiguous in " | |
2602 | "multiple inheritance lattice", id_expression); | |
2603 | print_candidates (decl); | |
2604 | return error_mark_node; | |
2605 | } | |
415d4636 MM |
2606 | |
2607 | /* Mark variable-like entities as used. Functions are similarly | |
2608 | marked either below or after overload resolution. */ | |
2609 | if (TREE_CODE (decl) == VAR_DECL | |
2610 | || TREE_CODE (decl) == PARM_DECL | |
2611 | || TREE_CODE (decl) == RESULT_DECL) | |
2612 | mark_used (decl); | |
2613 | ||
2614 | if (scope) | |
2615 | { | |
2616 | decl = (adjust_result_of_qualified_name_lookup | |
2617 | (decl, scope, current_class_type)); | |
e20bcc5e JH |
2618 | |
2619 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
2620 | mark_used (decl); | |
2621 | ||
415d4636 MM |
2622 | if (TREE_CODE (decl) == FIELD_DECL || BASELINK_P (decl)) |
2623 | *qualifying_class = scope; | |
2624 | else if (!processing_template_decl) | |
2625 | decl = convert_from_reference (decl); | |
2626 | else if (TYPE_P (scope)) | |
2627 | decl = build (SCOPE_REF, TREE_TYPE (decl), scope, decl); | |
2628 | } | |
9e95d15f NS |
2629 | else if (TREE_CODE (decl) == FIELD_DECL) |
2630 | decl = finish_non_static_data_member (decl, current_class_ref, | |
2631 | /*qualifying_scope=*/NULL_TREE); | |
2632 | else if (is_overloaded_fn (decl)) | |
2633 | { | |
2634 | tree first_fn = OVL_CURRENT (decl); | |
b3445994 | 2635 | |
9e95d15f NS |
2636 | if (TREE_CODE (first_fn) == TEMPLATE_DECL) |
2637 | first_fn = DECL_TEMPLATE_RESULT (first_fn); | |
415d4636 MM |
2638 | |
2639 | if (!really_overloaded_fn (decl)) | |
2640 | mark_used (first_fn); | |
2641 | ||
9e95d15f NS |
2642 | if (TREE_CODE (first_fn) == FUNCTION_DECL |
2643 | && DECL_FUNCTION_MEMBER_P (first_fn)) | |
2644 | { | |
2645 | /* A set of member functions. */ | |
2646 | decl = maybe_dummy_object (DECL_CONTEXT (first_fn), 0); | |
2647 | return finish_class_member_access_expr (decl, id_expression); | |
2648 | } | |
9e95d15f NS |
2649 | } |
2650 | else | |
2651 | { | |
2652 | if (TREE_CODE (decl) == VAR_DECL | |
2653 | || TREE_CODE (decl) == PARM_DECL | |
2654 | || TREE_CODE (decl) == RESULT_DECL) | |
2655 | { | |
2656 | tree context = decl_function_context (decl); | |
2657 | ||
2658 | if (context != NULL_TREE && context != current_function_decl | |
2659 | && ! TREE_STATIC (decl)) | |
2660 | { | |
2661 | error ("use of %s from containing function", | |
2662 | (TREE_CODE (decl) == VAR_DECL | |
2663 | ? "`auto' variable" : "parameter")); | |
2664 | cp_error_at (" `%#D' declared here", decl); | |
2665 | return error_mark_node; | |
2666 | } | |
2667 | } | |
2668 | ||
2669 | if (DECL_P (decl) && DECL_NONLOCAL (decl) | |
2670 | && DECL_CLASS_SCOPE_P (decl) | |
2671 | && DECL_CONTEXT (decl) != current_class_type) | |
2672 | { | |
2673 | tree path; | |
2674 | ||
2675 | path = currently_open_derived_class (DECL_CONTEXT (decl)); | |
2676 | perform_or_defer_access_check (TYPE_BINFO (path), decl); | |
2677 | } | |
2678 | ||
9e95d15f NS |
2679 | if (! processing_template_decl) |
2680 | decl = convert_from_reference (decl); | |
2681 | } | |
2682 | ||
b3445994 MM |
2683 | /* Resolve references to variables of anonymous unions |
2684 | into COMPONENT_REFs. */ | |
2685 | if (TREE_CODE (decl) == ALIAS_DECL) | |
6de9cd9a | 2686 | decl = unshare_expr (DECL_INITIAL (decl)); |
b3445994 MM |
2687 | } |
2688 | ||
2689 | if (TREE_DEPRECATED (decl)) | |
2690 | warn_deprecated_use (decl); | |
2691 | ||
2692 | return decl; | |
2693 | } | |
2694 | ||
0213a355 JM |
2695 | /* Implement the __typeof keyword: Return the type of EXPR, suitable for |
2696 | use as a type-specifier. */ | |
2697 | ||
b894fc05 | 2698 | tree |
3a978d72 | 2699 | finish_typeof (tree expr) |
b894fc05 | 2700 | { |
65a5559b MM |
2701 | tree type; |
2702 | ||
dffbbe80 | 2703 | if (type_dependent_expression_p (expr)) |
b894fc05 | 2704 | { |
65a5559b | 2705 | type = make_aggr_type (TYPEOF_TYPE); |
eb34af89 | 2706 | TYPEOF_TYPE_EXPR (type) = expr; |
b894fc05 | 2707 | |
65a5559b | 2708 | return type; |
b894fc05 JM |
2709 | } |
2710 | ||
65a5559b MM |
2711 | type = TREE_TYPE (expr); |
2712 | ||
2713 | if (!type || type == unknown_type_node) | |
2714 | { | |
2715 | error ("type of `%E' is unknown", expr); | |
2716 | return error_mark_node; | |
2717 | } | |
2718 | ||
2719 | return type; | |
b894fc05 | 2720 | } |
558475f0 | 2721 | |
3eb24f73 | 2722 | /* Called from expand_body via walk_tree. Replace all AGGR_INIT_EXPRs |
6de9cd9a | 2723 | with equivalent CALL_EXPRs. */ |
3eb24f73 MM |
2724 | |
2725 | static tree | |
3a978d72 | 2726 | simplify_aggr_init_exprs_r (tree* tp, |
9eeb200f JM |
2727 | int* walk_subtrees, |
2728 | void* data ATTRIBUTE_UNUSED) | |
3eb24f73 | 2729 | { |
22e92ac3 MM |
2730 | /* We don't need to walk into types; there's nothing in a type that |
2731 | needs simplification. (And, furthermore, there are places we | |
2732 | actively don't want to go. For example, we don't want to wander | |
2733 | into the default arguments for a FUNCTION_DECL that appears in a | |
2734 | CALL_EXPR.) */ | |
9eeb200f | 2735 | if (TYPE_P (*tp)) |
22e92ac3 MM |
2736 | { |
2737 | *walk_subtrees = 0; | |
2738 | return NULL_TREE; | |
2739 | } | |
2740 | /* Only AGGR_INIT_EXPRs are interesting. */ | |
9eeb200f | 2741 | else if (TREE_CODE (*tp) != AGGR_INIT_EXPR) |
3eb24f73 MM |
2742 | return NULL_TREE; |
2743 | ||
9eeb200f JM |
2744 | simplify_aggr_init_expr (tp); |
2745 | ||
2746 | /* Keep iterating. */ | |
2747 | return NULL_TREE; | |
2748 | } | |
2749 | ||
2750 | /* Replace the AGGR_INIT_EXPR at *TP with an equivalent CALL_EXPR. This | |
2751 | function is broken out from the above for the benefit of the tree-ssa | |
2752 | project. */ | |
2753 | ||
2754 | void | |
2755 | simplify_aggr_init_expr (tree *tp) | |
2756 | { | |
2757 | tree aggr_init_expr = *tp; | |
2758 | ||
3eb24f73 | 2759 | /* Form an appropriate CALL_EXPR. */ |
9eeb200f JM |
2760 | tree fn = TREE_OPERAND (aggr_init_expr, 0); |
2761 | tree args = TREE_OPERAND (aggr_init_expr, 1); | |
2762 | tree slot = TREE_OPERAND (aggr_init_expr, 2); | |
2692eb7d | 2763 | tree type = TREE_TYPE (slot); |
9eeb200f JM |
2764 | |
2765 | tree call_expr; | |
2766 | enum style_t { ctor, arg, pcc } style; | |
4977bab6 | 2767 | |
3eb24f73 | 2768 | if (AGGR_INIT_VIA_CTOR_P (aggr_init_expr)) |
4977bab6 ZW |
2769 | style = ctor; |
2770 | #ifdef PCC_STATIC_STRUCT_RETURN | |
2771 | else if (1) | |
2772 | style = pcc; | |
2773 | #endif | |
2774 | else if (TREE_ADDRESSABLE (type)) | |
2775 | style = arg; | |
2776 | else | |
2777 | /* We shouldn't build an AGGR_INIT_EXPR if we don't need any special | |
2778 | handling. See build_cplus_new. */ | |
2779 | abort (); | |
2780 | ||
2781 | if (style == ctor || style == arg) | |
3eb24f73 | 2782 | { |
4977bab6 ZW |
2783 | /* Pass the address of the slot. If this is a constructor, we |
2784 | replace the first argument; otherwise, we tack on a new one. */ | |
9eeb200f JM |
2785 | tree addr; |
2786 | ||
4977bab6 ZW |
2787 | if (style == ctor) |
2788 | args = TREE_CHAIN (args); | |
2789 | ||
dffd7eb6 | 2790 | cxx_mark_addressable (slot); |
2692eb7d | 2791 | addr = build1 (ADDR_EXPR, build_pointer_type (type), slot); |
9eeb200f JM |
2792 | if (style == arg) |
2793 | { | |
2794 | /* The return type might have different cv-quals from the slot. */ | |
2795 | tree fntype = TREE_TYPE (TREE_TYPE (fn)); | |
2796 | #ifdef ENABLE_CHECKING | |
2797 | if (TREE_CODE (fntype) != FUNCTION_TYPE | |
2798 | && TREE_CODE (fntype) != METHOD_TYPE) | |
2799 | abort (); | |
2800 | #endif | |
2801 | addr = convert (build_pointer_type (TREE_TYPE (fntype)), addr); | |
2802 | } | |
2803 | ||
2804 | args = tree_cons (NULL_TREE, addr, args); | |
3eb24f73 | 2805 | } |
4977bab6 | 2806 | |
b850de4f MM |
2807 | call_expr = build (CALL_EXPR, |
2808 | TREE_TYPE (TREE_TYPE (TREE_TYPE (fn))), | |
2809 | fn, args, NULL_TREE); | |
3eb24f73 | 2810 | |
4977bab6 | 2811 | if (style == arg) |
89ea02fb JM |
2812 | /* Tell the backend that we've added our return slot to the argument |
2813 | list. */ | |
2814 | CALL_EXPR_HAS_RETURN_SLOT_ADDR (call_expr) = 1; | |
4977bab6 | 2815 | else if (style == pcc) |
3eb24f73 | 2816 | { |
4977bab6 ZW |
2817 | /* If we're using the non-reentrant PCC calling convention, then we |
2818 | need to copy the returned value out of the static buffer into the | |
2819 | SLOT. */ | |
78757caa | 2820 | push_deferring_access_checks (dk_no_check); |
46af705a JDA |
2821 | call_expr = build_aggr_init (slot, call_expr, |
2822 | DIRECT_BIND | LOOKUP_ONLYCONVERTING); | |
78757caa | 2823 | pop_deferring_access_checks (); |
3eb24f73 | 2824 | } |
3eb24f73 | 2825 | |
3eb24f73 | 2826 | *tp = call_expr; |
3eb24f73 MM |
2827 | } |
2828 | ||
31f8e4f3 MM |
2829 | /* Emit all thunks to FN that should be emitted when FN is emitted. */ |
2830 | ||
2831 | static void | |
3a978d72 | 2832 | emit_associated_thunks (tree fn) |
31f8e4f3 MM |
2833 | { |
2834 | /* When we use vcall offsets, we emit thunks with the virtual | |
2835 | functions to which they thunk. The whole point of vcall offsets | |
2836 | is so that you can know statically the entire set of thunks that | |
2837 | will ever be needed for a given virtual function, thereby | |
2838 | enabling you to output all the thunks with the function itself. */ | |
3461fba7 | 2839 | if (DECL_VIRTUAL_P (fn)) |
31f8e4f3 | 2840 | { |
bb5e8a7f | 2841 | tree thunk; |
4977bab6 | 2842 | |
bb5e8a7f | 2843 | for (thunk = DECL_THUNKS (fn); thunk; thunk = TREE_CHAIN (thunk)) |
4977bab6 | 2844 | { |
e00853fd | 2845 | if (!THUNK_ALIAS (thunk)) |
4977bab6 | 2846 | { |
bb885938 NS |
2847 | use_thunk (thunk, /*emit_p=*/1); |
2848 | if (DECL_RESULT_THUNK_P (thunk)) | |
2849 | { | |
2850 | tree probe; | |
2851 | ||
2852 | for (probe = DECL_THUNKS (thunk); | |
2853 | probe; probe = TREE_CHAIN (probe)) | |
2854 | use_thunk (probe, /*emit_p=*/1); | |
2855 | } | |
4977bab6 | 2856 | } |
bb885938 NS |
2857 | else |
2858 | my_friendly_assert (!DECL_THUNKS (thunk), 20031023); | |
4977bab6 | 2859 | } |
31f8e4f3 MM |
2860 | } |
2861 | } | |
2862 | ||
558475f0 MM |
2863 | /* Generate RTL for FN. */ |
2864 | ||
2865 | void | |
3a978d72 | 2866 | expand_body (tree fn) |
558475f0 | 2867 | { |
367aa585 | 2868 | tree saved_function; |
6de9cd9a | 2869 | |
92788413 MM |
2870 | /* Compute the appropriate object-file linkage for inline |
2871 | functions. */ | |
79065db2 | 2872 | if (DECL_DECLARED_INLINE_P (fn)) |
92788413 MM |
2873 | import_export_decl (fn); |
2874 | ||
4f8e1232 MM |
2875 | /* If FN is external, then there's no point in generating RTL for |
2876 | it. This situation can arise with an inline function under | |
83662e2b | 2877 | `-fexternal-templates'; we instantiate the function, even though |
4f8e1232 MM |
2878 | we're not planning on emitting it, in case we get a chance to |
2879 | inline it. */ | |
2880 | if (DECL_EXTERNAL (fn)) | |
2881 | return; | |
2882 | ||
4985cde3 | 2883 | /* ??? When is this needed? */ |
367aa585 | 2884 | saved_function = current_function_decl; |
367aa585 | 2885 | |
de81ffd4 JH |
2886 | /* Emit any thunks that should be emitted at the same time as FN. */ |
2887 | emit_associated_thunks (fn); | |
2888 | ||
c1f927e8 | 2889 | tree_rest_of_compilation (fn, function_depth > 1); |
d658cd4c | 2890 | |
367aa585 | 2891 | current_function_decl = saved_function; |
ea11ca7e | 2892 | |
4985cde3 | 2893 | extract_interface_info (); |
14691f8d | 2894 | |
4985cde3 RH |
2895 | /* If this function is marked with the constructor attribute, add it |
2896 | to the list of functions to be called along with constructors | |
2897 | from static duration objects. */ | |
2898 | if (DECL_STATIC_CONSTRUCTOR (fn)) | |
2899 | static_ctors = tree_cons (NULL_TREE, fn, static_ctors); | |
2900 | ||
2901 | /* If this function is marked with the destructor attribute, add it | |
2902 | to the list of functions to be called along with destructors from | |
2903 | static duration objects. */ | |
2904 | if (DECL_STATIC_DESTRUCTOR (fn)) | |
2905 | static_dtors = tree_cons (NULL_TREE, fn, static_dtors); | |
85b22f78 NS |
2906 | |
2907 | if (DECL_CLONED_FUNCTION_P (fn)) | |
2908 | { | |
2909 | /* If this is a clone, go through the other clones now and mark | |
2910 | their parameters used. We have to do that here, as we don't | |
2911 | know whether any particular clone will be expanded, and | |
2912 | therefore cannot pick one arbitrarily. */ | |
2913 | tree probe; | |
2914 | ||
2915 | for (probe = TREE_CHAIN (DECL_CLONED_FUNCTION (fn)); | |
2916 | probe && DECL_CLONED_FUNCTION_P (probe); | |
2917 | probe = TREE_CHAIN (probe)) | |
2918 | { | |
2919 | tree parms; | |
2920 | ||
2921 | for (parms = DECL_ARGUMENTS (probe); | |
2922 | parms; parms = TREE_CHAIN (parms)) | |
2923 | TREE_USED (parms) = 1; | |
2924 | } | |
2925 | } | |
558475f0 | 2926 | } |
54f7877c | 2927 | |
8cd2462c JH |
2928 | /* Generate RTL for FN. */ |
2929 | ||
2930 | void | |
5671bf27 | 2931 | expand_or_defer_fn (tree fn) |
8cd2462c JH |
2932 | { |
2933 | /* When the parser calls us after finishing the body of a template | |
c353b8e3 MM |
2934 | function, we don't really want to expand the body. */ |
2935 | if (processing_template_decl) | |
8cd2462c JH |
2936 | { |
2937 | /* Normally, collection only occurs in rest_of_compilation. So, | |
2938 | if we don't collect here, we never collect junk generated | |
2939 | during the processing of templates until we hit a | |
2940 | non-template function. */ | |
2941 | ggc_collect (); | |
2942 | return; | |
2943 | } | |
2944 | ||
2945 | /* Replace AGGR_INIT_EXPRs with appropriate CALL_EXPRs. */ | |
2946 | walk_tree_without_duplicates (&DECL_SAVED_TREE (fn), | |
2947 | simplify_aggr_init_exprs_r, | |
2948 | NULL); | |
2949 | ||
2950 | /* If this is a constructor or destructor body, we have to clone | |
2951 | it. */ | |
2952 | if (maybe_clone_body (fn)) | |
2953 | { | |
2954 | /* We don't want to process FN again, so pretend we've written | |
2955 | it out, even though we haven't. */ | |
2956 | TREE_ASM_WRITTEN (fn) = 1; | |
2957 | return; | |
2958 | } | |
2959 | ||
2960 | /* There's no reason to do any of the work here if we're only doing | |
2961 | semantic analysis; this code just generates RTL. */ | |
2962 | if (flag_syntax_only) | |
2963 | return; | |
2964 | ||
e4d91027 RH |
2965 | /* Compute the appropriate object-file linkage for inline functions. */ |
2966 | if (DECL_DECLARED_INLINE_P (fn)) | |
2967 | import_export_decl (fn); | |
8cd2462c | 2968 | |
99edd65d RH |
2969 | function_depth++; |
2970 | ||
e4d91027 | 2971 | /* Expand or defer, at the whim of the compilation unit manager. */ |
6b00c969 | 2972 | cgraph_finalize_function (fn, function_depth > 1); |
99edd65d RH |
2973 | |
2974 | function_depth--; | |
8cd2462c JH |
2975 | } |
2976 | ||
6de9cd9a DN |
2977 | struct nrv_data |
2978 | { | |
2979 | tree var; | |
2980 | tree result; | |
2981 | htab_t visited; | |
2982 | }; | |
0d97bf4c | 2983 | |
6de9cd9a DN |
2984 | /* Helper function for walk_tree, used by finalize_nrv below. */ |
2985 | ||
2986 | static tree | |
2987 | finalize_nrv_r (tree* tp, int* walk_subtrees, void* data) | |
0d97bf4c | 2988 | { |
6de9cd9a DN |
2989 | struct nrv_data *dp = (struct nrv_data *)data; |
2990 | void **slot; | |
07b2f2fd JM |
2991 | |
2992 | /* No need to walk into types. There wouldn't be any need to walk into | |
2993 | non-statements, except that we have to consider STMT_EXPRs. */ | |
0d97bf4c JM |
2994 | if (TYPE_P (*tp)) |
2995 | *walk_subtrees = 0; | |
6de9cd9a DN |
2996 | /* Change all returns to just refer to the RESULT_DECL; this is a nop, |
2997 | but differs from using NULL_TREE in that it indicates that we care | |
2998 | about the value of the RESULT_DECL. */ | |
5088b058 RH |
2999 | else if (TREE_CODE (*tp) == RETURN_EXPR) |
3000 | TREE_OPERAND (*tp, 0) = dp->result; | |
6de9cd9a DN |
3001 | /* Change all cleanups for the NRV to only run when an exception is |
3002 | thrown. */ | |
07b2f2fd | 3003 | else if (TREE_CODE (*tp) == CLEANUP_STMT |
6de9cd9a | 3004 | && CLEANUP_DECL (*tp) == dp->var) |
659e5a7a | 3005 | CLEANUP_EH_ONLY (*tp) = 1; |
350fae66 | 3006 | /* Replace the DECL_EXPR for the NRV with an initialization of the |
6de9cd9a | 3007 | RESULT_DECL, if needed. */ |
350fae66 RK |
3008 | else if (TREE_CODE (*tp) == DECL_EXPR |
3009 | && DECL_EXPR_DECL (*tp) == dp->var) | |
6de9cd9a DN |
3010 | { |
3011 | tree init; | |
3012 | if (DECL_INITIAL (dp->var) | |
3013 | && DECL_INITIAL (dp->var) != error_mark_node) | |
3014 | { | |
3015 | init = build (INIT_EXPR, void_type_node, dp->result, | |
3016 | DECL_INITIAL (dp->var)); | |
3017 | DECL_INITIAL (dp->var) = error_mark_node; | |
3018 | } | |
3019 | else | |
543a0daa | 3020 | init = build_empty_stmt (); |
6de9cd9a | 3021 | SET_EXPR_LOCUS (init, EXPR_LOCUS (*tp)); |
6de9cd9a DN |
3022 | *tp = init; |
3023 | } | |
3024 | /* And replace all uses of the NRV with the RESULT_DECL. */ | |
3025 | else if (*tp == dp->var) | |
3026 | *tp = dp->result; | |
3027 | ||
3028 | /* Avoid walking into the same tree more than once. Unfortunately, we | |
3029 | can't just use walk_tree_without duplicates because it would only call | |
3030 | us for the first occurrence of dp->var in the function body. */ | |
3031 | slot = htab_find_slot (dp->visited, *tp, INSERT); | |
3032 | if (*slot) | |
3033 | *walk_subtrees = 0; | |
3034 | else | |
3035 | *slot = *tp; | |
0d97bf4c JM |
3036 | |
3037 | /* Keep iterating. */ | |
3038 | return NULL_TREE; | |
3039 | } | |
3040 | ||
6de9cd9a | 3041 | /* Called from finish_function to implement the named return value |
5088b058 | 3042 | optimization by overriding all the RETURN_EXPRs and pertinent |
6de9cd9a DN |
3043 | CLEANUP_STMTs and replacing all occurrences of VAR with RESULT, the |
3044 | RESULT_DECL for the function. */ | |
f444e36b | 3045 | |
4985cde3 | 3046 | void |
6de9cd9a | 3047 | finalize_nrv (tree *tp, tree var, tree result) |
f444e36b | 3048 | { |
6de9cd9a DN |
3049 | struct nrv_data data; |
3050 | ||
3051 | /* Copy debugging information from VAR to RESULT. */ | |
3052 | DECL_NAME (result) = DECL_NAME (var); | |
3053 | DECL_SOURCE_LOCATION (result) = DECL_SOURCE_LOCATION (var); | |
3054 | DECL_ABSTRACT_ORIGIN (result) = DECL_ABSTRACT_ORIGIN (var); | |
3055 | /* Don't forget that we take its address. */ | |
3056 | TREE_ADDRESSABLE (result) = TREE_ADDRESSABLE (var); | |
3057 | ||
3058 | data.var = var; | |
3059 | data.result = result; | |
3060 | data.visited = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL); | |
3061 | walk_tree (tp, finalize_nrv_r, &data, 0); | |
3062 | htab_delete (data.visited); | |
b850de4f MM |
3063 | } |
3064 | ||
54f7877c MM |
3065 | /* Perform initialization related to this module. */ |
3066 | ||
3067 | void | |
3a978d72 | 3068 | init_cp_semantics (void) |
54f7877c | 3069 | { |
54f7877c | 3070 | } |
cf22909c KL |
3071 | |
3072 | #include "gt-cp-semantics.h" |