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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 | |
c8094d83 | 4 | and during the instantiation of template functions. |
ad321293 | 5 | |
b2ebd268 | 6 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
056928b2 | 7 | 2008, 2009, 2010 Free Software Foundation, Inc. |
ad321293 | 8 | Written by Mark Mitchell (mmitchell@usa.net) based on code found |
c8094d83 | 9 | formerly in parse.y and pt.c. |
ad321293 | 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 | 14 | under the terms of the GNU General Public License as published by |
e77f031d | 15 | the Free Software Foundation; either version 3, or (at your option) |
ad321293 | 16 | any later version. |
c8094d83 | 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. | |
c8094d83 | 22 | |
e77f031d NC |
23 | You should have received a copy of the GNU General Public License |
24 | along with GCC; see the file COPYING3. If not see | |
25 | <http://www.gnu.org/licenses/>. */ | |
ad321293 MM |
26 | |
27 | #include "config.h" | |
8d052bc7 | 28 | #include "system.h" |
4977bab6 ZW |
29 | #include "coretypes.h" |
30 | #include "tm.h" | |
ad321293 MM |
31 | #include "tree.h" |
32 | #include "cp-tree.h" | |
39dabefd | 33 | #include "c-family/c-common.h" |
25af8512 | 34 | #include "tree-inline.h" |
6de9cd9a | 35 | #include "tree-mudflap.h" |
12027a89 | 36 | #include "toplev.h" |
84df082b | 37 | #include "flags.h" |
225ff119 | 38 | #include "output.h" |
ea11ca7e | 39 | #include "timevar.h" |
6de9cd9a | 40 | #include "diagnostic.h" |
8cd2462c | 41 | #include "cgraph.h" |
325c3691 | 42 | #include "tree-iterator.h" |
3e1f1ba5 | 43 | #include "vec.h" |
44d10c10 | 44 | #include "target.h" |
726a989a | 45 | #include "gimple.h" |
7a8cba34 | 46 | #include "bitmap.h" |
ad321293 MM |
47 | |
48 | /* There routines provide a modular interface to perform many parsing | |
49 | operations. They may therefore be used during actual parsing, or | |
50 | during template instantiation, which may be regarded as a | |
0b4d5576 | 51 | degenerate form of parsing. */ |
ad321293 | 52 | |
3a978d72 | 53 | static tree maybe_convert_cond (tree); |
6de9cd9a | 54 | static tree finalize_nrv_r (tree *, int *, void *); |
d5f4eddd | 55 | static tree capture_decltype (tree); |
9660afe0 | 56 | static tree thisify_lambda_field (tree); |
4985cde3 | 57 | |
558475f0 | 58 | |
8d241e0b KL |
59 | /* Deferred Access Checking Overview |
60 | --------------------------------- | |
61 | ||
62 | Most C++ expressions and declarations require access checking | |
63 | to be performed during parsing. However, in several cases, | |
64 | this has to be treated differently. | |
65 | ||
66 | For member declarations, access checking has to be deferred | |
67 | until more information about the declaration is known. For | |
68 | example: | |
69 | ||
70 | class A { | |
0cbd7506 | 71 | typedef int X; |
8d241e0b | 72 | public: |
0cbd7506 | 73 | X f(); |
8d241e0b KL |
74 | }; |
75 | ||
76 | A::X A::f(); | |
77 | A::X g(); | |
78 | ||
79 | When we are parsing the function return type `A::X', we don't | |
80 | really know if this is allowed until we parse the function name. | |
81 | ||
82 | Furthermore, some contexts require that access checking is | |
83 | never performed at all. These include class heads, and template | |
84 | instantiations. | |
85 | ||
86 | Typical use of access checking functions is described here: | |
c8094d83 | 87 | |
8d241e0b KL |
88 | 1. When we enter a context that requires certain access checking |
89 | mode, the function `push_deferring_access_checks' is called with | |
90 | DEFERRING argument specifying the desired mode. Access checking | |
91 | may be performed immediately (dk_no_deferred), deferred | |
92 | (dk_deferred), or not performed (dk_no_check). | |
93 | ||
94 | 2. When a declaration such as a type, or a variable, is encountered, | |
95 | the function `perform_or_defer_access_check' is called. It | |
d6b418fa | 96 | maintains a VEC of all deferred checks. |
8d241e0b KL |
97 | |
98 | 3. The global `current_class_type' or `current_function_decl' is then | |
99 | setup by the parser. `enforce_access' relies on these information | |
100 | to check access. | |
101 | ||
102 | 4. Upon exiting the context mentioned in step 1, | |
103 | `perform_deferred_access_checks' is called to check all declaration | |
d6b418fa | 104 | stored in the VEC. `pop_deferring_access_checks' is then |
8d241e0b KL |
105 | called to restore the previous access checking mode. |
106 | ||
107 | In case of parsing error, we simply call `pop_deferring_access_checks' | |
108 | without `perform_deferred_access_checks'. */ | |
109 | ||
d1b38208 | 110 | typedef struct GTY(()) deferred_access { |
d6b418fa | 111 | /* A VEC representing name-lookups for which we have deferred |
3e1f1ba5 NS |
112 | checking access controls. We cannot check the accessibility of |
113 | names used in a decl-specifier-seq until we know what is being | |
114 | declared because code like: | |
115 | ||
c8094d83 | 116 | class A { |
0cbd7506 MS |
117 | class B {}; |
118 | B* f(); | |
3e1f1ba5 NS |
119 | } |
120 | ||
121 | A::B* A::f() { return 0; } | |
122 | ||
d6b418fa SM |
123 | is valid, even though `A::B' is not generally accessible. */ |
124 | VEC (deferred_access_check,gc)* GTY(()) deferred_access_checks; | |
c8094d83 | 125 | |
3e1f1ba5 NS |
126 | /* The current mode of access checks. */ |
127 | enum deferring_kind deferring_access_checks_kind; | |
c8094d83 | 128 | |
3e1f1ba5 | 129 | } deferred_access; |
d4e6fecb NS |
130 | DEF_VEC_O (deferred_access); |
131 | DEF_VEC_ALLOC_O (deferred_access,gc); | |
3e1f1ba5 | 132 | |
cf22909c | 133 | /* Data for deferred access checking. */ |
d4e6fecb | 134 | static GTY(()) VEC(deferred_access,gc) *deferred_access_stack; |
3e1f1ba5 | 135 | static GTY(()) unsigned deferred_access_no_check; |
cf22909c KL |
136 | |
137 | /* Save the current deferred access states and start deferred | |
138 | access checking iff DEFER_P is true. */ | |
139 | ||
572c2b17 AP |
140 | void |
141 | push_deferring_access_checks (deferring_kind deferring) | |
cf22909c | 142 | { |
78757caa KL |
143 | /* For context like template instantiation, access checking |
144 | disabling applies to all nested context. */ | |
3e1f1ba5 NS |
145 | if (deferred_access_no_check || deferring == dk_no_check) |
146 | deferred_access_no_check++; | |
cf22909c | 147 | else |
3e1f1ba5 NS |
148 | { |
149 | deferred_access *ptr; | |
cf22909c | 150 | |
d4e6fecb | 151 | ptr = VEC_safe_push (deferred_access, gc, deferred_access_stack, NULL); |
d6b418fa | 152 | ptr->deferred_access_checks = NULL; |
3e1f1ba5 NS |
153 | ptr->deferring_access_checks_kind = deferring; |
154 | } | |
cf22909c KL |
155 | } |
156 | ||
157 | /* Resume deferring access checks again after we stopped doing | |
158 | this previously. */ | |
159 | ||
572c2b17 AP |
160 | void |
161 | resume_deferring_access_checks (void) | |
cf22909c | 162 | { |
3e1f1ba5 NS |
163 | if (!deferred_access_no_check) |
164 | VEC_last (deferred_access, deferred_access_stack) | |
165 | ->deferring_access_checks_kind = dk_deferred; | |
cf22909c KL |
166 | } |
167 | ||
168 | /* Stop deferring access checks. */ | |
169 | ||
572c2b17 AP |
170 | void |
171 | stop_deferring_access_checks (void) | |
cf22909c | 172 | { |
3e1f1ba5 NS |
173 | if (!deferred_access_no_check) |
174 | VEC_last (deferred_access, deferred_access_stack) | |
175 | ->deferring_access_checks_kind = dk_no_deferred; | |
cf22909c KL |
176 | } |
177 | ||
178 | /* Discard the current deferred access checks and restore the | |
179 | previous states. */ | |
180 | ||
572c2b17 AP |
181 | void |
182 | pop_deferring_access_checks (void) | |
cf22909c | 183 | { |
3e1f1ba5 NS |
184 | if (deferred_access_no_check) |
185 | deferred_access_no_check--; | |
186 | else | |
187 | VEC_pop (deferred_access, deferred_access_stack); | |
cf22909c KL |
188 | } |
189 | ||
c8094d83 MS |
190 | /* Returns a TREE_LIST representing the deferred checks. |
191 | The TREE_PURPOSE of each node is the type through which the | |
cf22909c KL |
192 | access occurred; the TREE_VALUE is the declaration named. |
193 | */ | |
194 | ||
d6b418fa | 195 | VEC (deferred_access_check,gc)* |
572c2b17 | 196 | get_deferred_access_checks (void) |
cf22909c | 197 | { |
3e1f1ba5 NS |
198 | if (deferred_access_no_check) |
199 | return NULL; | |
200 | else | |
201 | return (VEC_last (deferred_access, deferred_access_stack) | |
202 | ->deferred_access_checks); | |
cf22909c KL |
203 | } |
204 | ||
205 | /* Take current deferred checks and combine with the | |
206 | previous states if we also defer checks previously. | |
207 | Otherwise perform checks now. */ | |
208 | ||
572c2b17 AP |
209 | void |
210 | pop_to_parent_deferring_access_checks (void) | |
cf22909c | 211 | { |
3e1f1ba5 NS |
212 | if (deferred_access_no_check) |
213 | deferred_access_no_check--; | |
214 | else | |
215 | { | |
d6b418fa | 216 | VEC (deferred_access_check,gc) *checks; |
3e1f1ba5 NS |
217 | deferred_access *ptr; |
218 | ||
219 | checks = (VEC_last (deferred_access, deferred_access_stack) | |
220 | ->deferred_access_checks); | |
221 | ||
222 | VEC_pop (deferred_access, deferred_access_stack); | |
223 | ptr = VEC_last (deferred_access, deferred_access_stack); | |
224 | if (ptr->deferring_access_checks_kind == dk_no_deferred) | |
225 | { | |
226 | /* Check access. */ | |
d6b418fa | 227 | perform_access_checks (checks); |
3e1f1ba5 NS |
228 | } |
229 | else | |
230 | { | |
231 | /* Merge with parent. */ | |
d6b418fa SM |
232 | int i, j; |
233 | deferred_access_check *chk, *probe; | |
c8094d83 | 234 | |
ac47786e | 235 | FOR_EACH_VEC_ELT (deferred_access_check, checks, i, chk) |
3e1f1ba5 | 236 | { |
ac47786e NF |
237 | FOR_EACH_VEC_ELT (deferred_access_check, |
238 | ptr->deferred_access_checks, j, probe) | |
d6b418fa SM |
239 | { |
240 | if (probe->binfo == chk->binfo && | |
241 | probe->decl == chk->decl && | |
242 | probe->diag_decl == chk->diag_decl) | |
243 | goto found; | |
244 | } | |
3e1f1ba5 | 245 | /* Insert into parent's checks. */ |
d6b418fa SM |
246 | VEC_safe_push (deferred_access_check, gc, |
247 | ptr->deferred_access_checks, chk); | |
3e1f1ba5 NS |
248 | found:; |
249 | } | |
250 | } | |
251 | } | |
cf22909c KL |
252 | } |
253 | ||
6b648482 MM |
254 | /* Perform the access checks in CHECKS. The TREE_PURPOSE of each node |
255 | is the BINFO indicating the qualifying scope used to access the | |
256 | DECL node stored in the TREE_VALUE of the node. */ | |
257 | ||
258 | void | |
d6b418fa | 259 | perform_access_checks (VEC (deferred_access_check,gc)* checks) |
6b648482 | 260 | { |
d6b418fa SM |
261 | int i; |
262 | deferred_access_check *chk; | |
263 | ||
264 | if (!checks) | |
265 | return; | |
266 | ||
ac47786e | 267 | FOR_EACH_VEC_ELT (deferred_access_check, checks, i, chk) |
d6b418fa | 268 | enforce_access (chk->binfo, chk->decl, chk->diag_decl); |
6b648482 MM |
269 | } |
270 | ||
25903d03 KL |
271 | /* Perform the deferred access checks. |
272 | ||
273 | After performing the checks, we still have to keep the list | |
274 | `deferred_access_stack->deferred_access_checks' since we may want | |
275 | to check access for them again later in a different context. | |
276 | For example: | |
277 | ||
278 | class A { | |
279 | typedef int X; | |
280 | static X a; | |
281 | }; | |
282 | A::X A::a, x; // No error for `A::a', error for `x' | |
283 | ||
284 | We have to perform deferred access of `A::X', first with `A::a', | |
285 | next with `x'. */ | |
cf22909c | 286 | |
572c2b17 AP |
287 | void |
288 | perform_deferred_access_checks (void) | |
cf22909c | 289 | { |
6b648482 | 290 | perform_access_checks (get_deferred_access_checks ()); |
cf22909c KL |
291 | } |
292 | ||
293 | /* Defer checking the accessibility of DECL, when looked up in | |
02022f3a | 294 | BINFO. DIAG_DECL is the declaration to use to print diagnostics. */ |
cf22909c | 295 | |
572c2b17 | 296 | void |
02022f3a | 297 | perform_or_defer_access_check (tree binfo, tree decl, tree diag_decl) |
cf22909c | 298 | { |
d6b418fa | 299 | int i; |
3e1f1ba5 | 300 | deferred_access *ptr; |
d6b418fa SM |
301 | deferred_access_check *chk; |
302 | deferred_access_check *new_access; | |
303 | ||
cf22909c | 304 | |
3e1f1ba5 NS |
305 | /* Exit if we are in a context that no access checking is performed. |
306 | */ | |
307 | if (deferred_access_no_check) | |
0f2a66c9 | 308 | return; |
c8094d83 | 309 | |
50bc768d | 310 | gcc_assert (TREE_CODE (binfo) == TREE_BINFO); |
0f2a66c9 | 311 | |
3e1f1ba5 | 312 | ptr = VEC_last (deferred_access, deferred_access_stack); |
c8094d83 | 313 | |
cf22909c | 314 | /* If we are not supposed to defer access checks, just check now. */ |
3e1f1ba5 | 315 | if (ptr->deferring_access_checks_kind == dk_no_deferred) |
cf22909c | 316 | { |
02022f3a | 317 | enforce_access (binfo, decl, diag_decl); |
cf22909c KL |
318 | return; |
319 | } | |
c8094d83 | 320 | |
cf22909c | 321 | /* See if we are already going to perform this check. */ |
ac47786e NF |
322 | FOR_EACH_VEC_ELT (deferred_access_check, |
323 | ptr->deferred_access_checks, i, chk) | |
d6b418fa SM |
324 | { |
325 | if (chk->decl == decl && chk->binfo == binfo && | |
326 | chk->diag_decl == diag_decl) | |
327 | { | |
328 | return; | |
329 | } | |
330 | } | |
cf22909c | 331 | /* If not, record the check. */ |
d6b418fa SM |
332 | new_access = |
333 | VEC_safe_push (deferred_access_check, gc, | |
334 | ptr->deferred_access_checks, 0); | |
335 | new_access->binfo = binfo; | |
336 | new_access->decl = decl; | |
337 | new_access->diag_decl = diag_decl; | |
cf22909c KL |
338 | } |
339 | ||
838dfd8a | 340 | /* Returns nonzero if the current statement is a full expression, |
f2c5f623 BC |
341 | i.e. temporaries created during that statement should be destroyed |
342 | at the end of the statement. */ | |
35b1567d | 343 | |
f2c5f623 | 344 | int |
3a978d72 | 345 | stmts_are_full_exprs_p (void) |
f2c5f623 | 346 | { |
ae499cce MM |
347 | return current_stmt_tree ()->stmts_are_full_exprs_p; |
348 | } | |
349 | ||
ed3d0b14 ILT |
350 | /* T is a statement. Add it to the statement-tree. This is the C++ |
351 | version. The C/ObjC frontends have a slightly different version of | |
352 | this function. */ | |
353 | ||
354 | tree | |
355 | add_stmt (tree t) | |
356 | { | |
357 | enum tree_code code = TREE_CODE (t); | |
358 | ||
359 | if (EXPR_P (t) && code != LABEL_EXPR) | |
360 | { | |
361 | if (!EXPR_HAS_LOCATION (t)) | |
362 | SET_EXPR_LOCATION (t, input_location); | |
363 | ||
364 | /* When we expand a statement-tree, we must know whether or not the | |
365 | statements are full-expressions. We record that fact here. */ | |
366 | STMT_IS_FULL_EXPR_P (t) = stmts_are_full_exprs_p (); | |
367 | } | |
368 | ||
369 | /* Add T to the statement-tree. Non-side-effect statements need to be | |
370 | recorded during statement expressions. */ | |
371 | append_to_statement_list_force (t, &cur_stmt_list); | |
372 | ||
373 | return t; | |
374 | } | |
375 | ||
e8924938 | 376 | /* Returns the stmt_tree to which statements are currently being added. */ |
ae499cce MM |
377 | |
378 | stmt_tree | |
3a978d72 | 379 | current_stmt_tree (void) |
ae499cce | 380 | { |
c8094d83 MS |
381 | return (cfun |
382 | ? &cfun->language->base.x_stmt_tree | |
ae499cce | 383 | : &scope_chain->x_stmt_tree); |
f2c5f623 | 384 | } |
35b1567d | 385 | |
543a0daa RH |
386 | /* If statements are full expressions, wrap STMT in a CLEANUP_POINT_EXPR. */ |
387 | ||
388 | static tree | |
389 | maybe_cleanup_point_expr (tree expr) | |
390 | { | |
391 | if (!processing_template_decl && stmts_are_full_exprs_p ()) | |
0ad28dde | 392 | expr = fold_build_cleanup_point_expr (TREE_TYPE (expr), expr); |
543a0daa RH |
393 | return expr; |
394 | } | |
395 | ||
0ad28dde | 396 | /* Like maybe_cleanup_point_expr except have the type of the new expression be |
22423a1f KH |
397 | void so we don't need to create a temporary variable to hold the inner |
398 | expression. The reason why we do this is because the original type might be | |
399 | an aggregate and we cannot create a temporary variable for that type. */ | |
0ad28dde AP |
400 | |
401 | static tree | |
402 | maybe_cleanup_point_expr_void (tree expr) | |
403 | { | |
404 | if (!processing_template_decl && stmts_are_full_exprs_p ()) | |
405 | expr = fold_build_cleanup_point_expr (void_type_node, expr); | |
406 | return expr; | |
407 | } | |
408 | ||
409 | ||
410 | ||
543a0daa RH |
411 | /* Create a declaration statement for the declaration given by the DECL. */ |
412 | ||
413 | void | |
350fae66 | 414 | add_decl_expr (tree decl) |
543a0daa | 415 | { |
c2255bc4 | 416 | tree r = build_stmt (input_location, DECL_EXPR, decl); |
b187901e AP |
417 | if (DECL_INITIAL (decl) |
418 | || (DECL_SIZE (decl) && TREE_SIDE_EFFECTS (DECL_SIZE (decl)))) | |
0ad28dde | 419 | r = maybe_cleanup_point_expr_void (r); |
543a0daa RH |
420 | add_stmt (r); |
421 | } | |
422 | ||
f2c5f623 | 423 | /* Finish a scope. */ |
35b1567d | 424 | |
20aff0b3 | 425 | tree |
325c3691 | 426 | do_poplevel (tree stmt_list) |
35b1567d | 427 | { |
325c3691 | 428 | tree block = NULL; |
35b1567d | 429 | |
f2c5f623 | 430 | if (stmts_are_full_exprs_p ()) |
325c3691 | 431 | block = poplevel (kept_level_p (), 1, 0); |
f2c5f623 | 432 | |
325c3691 | 433 | stmt_list = pop_stmt_list (stmt_list); |
c8094d83 | 434 | |
325c3691 RH |
435 | if (!processing_template_decl) |
436 | { | |
c2255bc4 | 437 | stmt_list = c_build_bind_expr (input_location, block, stmt_list); |
325c3691 | 438 | /* ??? See c_end_compound_stmt re statement expressions. */ |
35b1567d BC |
439 | } |
440 | ||
325c3691 | 441 | return stmt_list; |
35b1567d BC |
442 | } |
443 | ||
c8094d83 | 444 | /* Begin a new scope. */ |
35b1567d | 445 | |
325c3691 | 446 | static tree |
92bc1323 | 447 | do_pushlevel (scope_kind sk) |
35b1567d | 448 | { |
325c3691 | 449 | tree ret = push_stmt_list (); |
f2c5f623 | 450 | if (stmts_are_full_exprs_p ()) |
325c3691 RH |
451 | begin_scope (sk, NULL); |
452 | return ret; | |
453 | } | |
5a508662 RH |
454 | |
455 | /* Queue a cleanup. CLEANUP is an expression/statement to be executed | |
456 | when the current scope is exited. EH_ONLY is true when this is not | |
457 | meant to apply to normal control flow transfer. */ | |
458 | ||
459 | void | |
460 | push_cleanup (tree decl, tree cleanup, bool eh_only) | |
461 | { | |
c2255bc4 | 462 | tree stmt = build_stmt (input_location, CLEANUP_STMT, NULL, cleanup, decl); |
5a508662 RH |
463 | CLEANUP_EH_ONLY (stmt) = eh_only; |
464 | add_stmt (stmt); | |
465 | CLEANUP_BODY (stmt) = push_stmt_list (); | |
466 | } | |
325c3691 | 467 | |
caf2523d RH |
468 | /* Begin a conditional that might contain a declaration. When generating |
469 | normal code, we want the declaration to appear before the statement | |
470 | containing the conditional. When generating template code, we want the | |
350fae66 | 471 | conditional to be rendered as the raw DECL_EXPR. */ |
325c3691 RH |
472 | |
473 | static void | |
caf2523d | 474 | begin_cond (tree *cond_p) |
325c3691 | 475 | { |
caf2523d RH |
476 | if (processing_template_decl) |
477 | *cond_p = push_stmt_list (); | |
478 | } | |
479 | ||
480 | /* Finish such a conditional. */ | |
481 | ||
482 | static void | |
483 | finish_cond (tree *cond_p, tree expr) | |
484 | { | |
485 | if (processing_template_decl) | |
35b1567d | 486 | { |
caf2523d | 487 | tree cond = pop_stmt_list (*cond_p); |
350fae66 | 488 | if (TREE_CODE (cond) == DECL_EXPR) |
caf2523d | 489 | expr = cond; |
5d80a306 | 490 | |
7b3e2d46 | 491 | if (check_for_bare_parameter_packs (expr)) |
4439d02f | 492 | *cond_p = error_mark_node; |
35b1567d | 493 | } |
caf2523d | 494 | *cond_p = expr; |
35b1567d BC |
495 | } |
496 | ||
325c3691 RH |
497 | /* If *COND_P specifies a conditional with a declaration, transform the |
498 | loop such that | |
0cbd7506 MS |
499 | while (A x = 42) { } |
500 | for (; A x = 42;) { } | |
325c3691 | 501 | becomes |
0cbd7506 MS |
502 | while (true) { A x = 42; if (!x) break; } |
503 | for (;;) { A x = 42; if (!x) break; } | |
caf2523d RH |
504 | The statement list for BODY will be empty if the conditional did |
505 | not declare anything. */ | |
c8094d83 | 506 | |
325c3691 | 507 | static void |
caf2523d | 508 | simplify_loop_decl_cond (tree *cond_p, tree body) |
325c3691 | 509 | { |
caf2523d | 510 | tree cond, if_stmt; |
325c3691 | 511 | |
caf2523d RH |
512 | if (!TREE_SIDE_EFFECTS (body)) |
513 | return; | |
325c3691 | 514 | |
caf2523d RH |
515 | cond = *cond_p; |
516 | *cond_p = boolean_true_node; | |
c8094d83 | 517 | |
caf2523d | 518 | if_stmt = begin_if_stmt (); |
5ade1ed2 | 519 | cond = cp_build_unary_op (TRUTH_NOT_EXPR, cond, 0, tf_warning_or_error); |
caf2523d RH |
520 | finish_if_stmt_cond (cond, if_stmt); |
521 | finish_break_stmt (); | |
522 | finish_then_clause (if_stmt); | |
523 | finish_if_stmt (if_stmt); | |
524 | } | |
325c3691 | 525 | |
35b1567d BC |
526 | /* Finish a goto-statement. */ |
527 | ||
3e4d04a1 | 528 | tree |
3a978d72 | 529 | finish_goto_stmt (tree destination) |
35b1567d BC |
530 | { |
531 | if (TREE_CODE (destination) == IDENTIFIER_NODE) | |
532 | destination = lookup_label (destination); | |
533 | ||
534 | /* We warn about unused labels with -Wunused. That means we have to | |
535 | mark the used labels as used. */ | |
536 | if (TREE_CODE (destination) == LABEL_DECL) | |
537 | TREE_USED (destination) = 1; | |
fc2b8477 MM |
538 | else |
539 | { | |
84628aa8 | 540 | destination = mark_rvalue_use (destination); |
fc2b8477 | 541 | if (!processing_template_decl) |
f5651df1 | 542 | { |
f5651df1 JJ |
543 | destination = cp_convert (ptr_type_node, destination); |
544 | if (error_operand_p (destination)) | |
545 | return NULL_TREE; | |
546 | } | |
fc2b8477 MM |
547 | /* We don't inline calls to functions with computed gotos. |
548 | Those functions are typically up to some funny business, | |
549 | and may be depending on the labels being at particular | |
550 | addresses, or some such. */ | |
551 | DECL_UNINLINABLE (current_function_decl) = 1; | |
552 | } | |
c8094d83 | 553 | |
35b1567d BC |
554 | check_goto (destination); |
555 | ||
c2255bc4 | 556 | return add_stmt (build_stmt (input_location, GOTO_EXPR, destination)); |
35b1567d BC |
557 | } |
558 | ||
ed5511d9 | 559 | /* COND is the condition-expression for an if, while, etc., |
d4033c81 MLI |
560 | statement. Convert it to a boolean value, if appropriate. |
561 | In addition, verify sequence points if -Wsequence-point is enabled. */ | |
ed5511d9 | 562 | |
8ce33230 | 563 | static tree |
3a978d72 | 564 | maybe_convert_cond (tree cond) |
ed5511d9 MM |
565 | { |
566 | /* Empty conditions remain empty. */ | |
567 | if (!cond) | |
568 | return NULL_TREE; | |
569 | ||
570 | /* Wait until we instantiate templates before doing conversion. */ | |
571 | if (processing_template_decl) | |
572 | return cond; | |
573 | ||
d4033c81 MLI |
574 | if (warn_sequence_point) |
575 | verify_sequence_points (cond); | |
576 | ||
ed5511d9 MM |
577 | /* Do the conversion. */ |
578 | cond = convert_from_reference (cond); | |
fbc8d2d3 ILT |
579 | |
580 | if (TREE_CODE (cond) == MODIFY_EXPR | |
581 | && !TREE_NO_WARNING (cond) | |
582 | && warn_parentheses) | |
583 | { | |
584 | warning (OPT_Wparentheses, | |
585 | "suggest parentheses around assignment used as truth value"); | |
586 | TREE_NO_WARNING (cond) = 1; | |
587 | } | |
588 | ||
ed5511d9 MM |
589 | return condition_conversion (cond); |
590 | } | |
591 | ||
9bfadf57 | 592 | /* Finish an expression-statement, whose EXPRESSION is as indicated. */ |
a7e4cfa0 | 593 | |
3e4d04a1 | 594 | tree |
3a978d72 | 595 | finish_expr_stmt (tree expr) |
ad321293 | 596 | { |
3e4d04a1 RH |
597 | tree r = NULL_TREE; |
598 | ||
ce4a0391 | 599 | if (expr != NULL_TREE) |
ad321293 | 600 | { |
a5bcc582 | 601 | if (!processing_template_decl) |
3a5b9284 RH |
602 | { |
603 | if (warn_sequence_point) | |
604 | verify_sequence_points (expr); | |
ebeb2c24 | 605 | expr = convert_to_void (expr, ICV_STATEMENT, tf_warning_or_error); |
3a5b9284 | 606 | } |
47d4c811 | 607 | else if (!type_dependent_expression_p (expr)) |
ebeb2c24 | 608 | convert_to_void (build_non_dependent_expr (expr), ICV_STATEMENT, |
5ade1ed2 | 609 | tf_warning_or_error); |
325c3691 | 610 | |
7b3e2d46 | 611 | if (check_for_bare_parameter_packs (expr)) |
4439d02f | 612 | expr = error_mark_node; |
5d80a306 | 613 | |
325c3691 | 614 | /* Simplification of inner statement expressions, compound exprs, |
ca5b80f3 | 615 | etc can result in us already having an EXPR_STMT. */ |
543a0daa RH |
616 | if (TREE_CODE (expr) != CLEANUP_POINT_EXPR) |
617 | { | |
618 | if (TREE_CODE (expr) != EXPR_STMT) | |
c2255bc4 | 619 | expr = build_stmt (input_location, EXPR_STMT, expr); |
0ad28dde | 620 | expr = maybe_cleanup_point_expr_void (expr); |
543a0daa RH |
621 | } |
622 | ||
325c3691 | 623 | r = add_stmt (expr); |
35b1567d | 624 | } |
364460b6 | 625 | |
35b1567d | 626 | finish_stmt (); |
558475f0 | 627 | |
3e4d04a1 | 628 | return r; |
35b1567d BC |
629 | } |
630 | ||
35b1567d | 631 | |
ad321293 MM |
632 | /* Begin an if-statement. Returns a newly created IF_STMT if |
633 | appropriate. */ | |
634 | ||
635 | tree | |
3a978d72 | 636 | begin_if_stmt (void) |
ad321293 | 637 | { |
325c3691 RH |
638 | tree r, scope; |
639 | scope = do_pushlevel (sk_block); | |
c2255bc4 | 640 | r = build_stmt (input_location, IF_STMT, NULL_TREE, NULL_TREE, NULL_TREE); |
325c3691 | 641 | TREE_CHAIN (r) = scope; |
caf2523d | 642 | begin_cond (&IF_COND (r)); |
ad321293 MM |
643 | return r; |
644 | } | |
645 | ||
646 | /* Process the COND of an if-statement, which may be given by | |
647 | IF_STMT. */ | |
648 | ||
c8094d83 | 649 | void |
3a978d72 | 650 | finish_if_stmt_cond (tree cond, tree if_stmt) |
ad321293 | 651 | { |
caf2523d RH |
652 | finish_cond (&IF_COND (if_stmt), maybe_convert_cond (cond)); |
653 | add_stmt (if_stmt); | |
325c3691 | 654 | THEN_CLAUSE (if_stmt) = push_stmt_list (); |
ad321293 MM |
655 | } |
656 | ||
657 | /* Finish the then-clause of an if-statement, which may be given by | |
658 | IF_STMT. */ | |
659 | ||
660 | tree | |
3a978d72 | 661 | finish_then_clause (tree if_stmt) |
ad321293 | 662 | { |
325c3691 | 663 | THEN_CLAUSE (if_stmt) = pop_stmt_list (THEN_CLAUSE (if_stmt)); |
35b1567d | 664 | return if_stmt; |
ad321293 MM |
665 | } |
666 | ||
667 | /* Begin the else-clause of an if-statement. */ | |
668 | ||
325c3691 RH |
669 | void |
670 | begin_else_clause (tree if_stmt) | |
ad321293 | 671 | { |
325c3691 | 672 | ELSE_CLAUSE (if_stmt) = push_stmt_list (); |
ad321293 MM |
673 | } |
674 | ||
675 | /* Finish the else-clause of an if-statement, which may be given by | |
676 | IF_STMT. */ | |
677 | ||
678 | void | |
3a978d72 | 679 | finish_else_clause (tree if_stmt) |
ad321293 | 680 | { |
325c3691 | 681 | ELSE_CLAUSE (if_stmt) = pop_stmt_list (ELSE_CLAUSE (if_stmt)); |
ad321293 MM |
682 | } |
683 | ||
dfbb4f34 | 684 | /* Finish an if-statement. */ |
ad321293 | 685 | |
c8094d83 | 686 | void |
325c3691 | 687 | finish_if_stmt (tree if_stmt) |
ad321293 | 688 | { |
325c3691 RH |
689 | tree scope = TREE_CHAIN (if_stmt); |
690 | TREE_CHAIN (if_stmt) = NULL; | |
691 | add_stmt (do_poplevel (scope)); | |
ad321293 | 692 | finish_stmt (); |
35b1567d BC |
693 | } |
694 | ||
ad321293 MM |
695 | /* Begin a while-statement. Returns a newly created WHILE_STMT if |
696 | appropriate. */ | |
697 | ||
698 | tree | |
3a978d72 | 699 | begin_while_stmt (void) |
ad321293 MM |
700 | { |
701 | tree r; | |
c2255bc4 | 702 | r = build_stmt (input_location, WHILE_STMT, NULL_TREE, NULL_TREE); |
ae499cce | 703 | add_stmt (r); |
325c3691 | 704 | WHILE_BODY (r) = do_pushlevel (sk_block); |
caf2523d | 705 | begin_cond (&WHILE_COND (r)); |
ad321293 MM |
706 | return r; |
707 | } | |
708 | ||
27d26ee7 | 709 | /* Process the COND of a while-statement, which may be given by |
ad321293 MM |
710 | WHILE_STMT. */ |
711 | ||
c8094d83 | 712 | void |
3a978d72 | 713 | finish_while_stmt_cond (tree cond, tree while_stmt) |
ad321293 | 714 | { |
caf2523d RH |
715 | finish_cond (&WHILE_COND (while_stmt), maybe_convert_cond (cond)); |
716 | simplify_loop_decl_cond (&WHILE_COND (while_stmt), WHILE_BODY (while_stmt)); | |
ad321293 MM |
717 | } |
718 | ||
719 | /* Finish a while-statement, which may be given by WHILE_STMT. */ | |
720 | ||
c8094d83 | 721 | void |
3a978d72 | 722 | finish_while_stmt (tree while_stmt) |
ad321293 | 723 | { |
325c3691 | 724 | WHILE_BODY (while_stmt) = do_poplevel (WHILE_BODY (while_stmt)); |
ad321293 MM |
725 | finish_stmt (); |
726 | } | |
727 | ||
728 | /* Begin a do-statement. Returns a newly created DO_STMT if | |
729 | appropriate. */ | |
730 | ||
731 | tree | |
3a978d72 | 732 | begin_do_stmt (void) |
ad321293 | 733 | { |
c2255bc4 | 734 | tree r = build_stmt (input_location, DO_STMT, NULL_TREE, NULL_TREE); |
ae499cce | 735 | add_stmt (r); |
325c3691 | 736 | DO_BODY (r) = push_stmt_list (); |
35b1567d | 737 | return r; |
ad321293 MM |
738 | } |
739 | ||
740 | /* Finish the body of a do-statement, which may be given by DO_STMT. */ | |
741 | ||
742 | void | |
3a978d72 | 743 | finish_do_body (tree do_stmt) |
ad321293 | 744 | { |
62e00e94 DM |
745 | tree body = DO_BODY (do_stmt) = pop_stmt_list (DO_BODY (do_stmt)); |
746 | ||
747 | if (TREE_CODE (body) == STATEMENT_LIST && STATEMENT_LIST_TAIL (body)) | |
748 | body = STATEMENT_LIST_TAIL (body)->stmt; | |
749 | ||
750 | if (IS_EMPTY_STMT (body)) | |
751 | warning (OPT_Wempty_body, | |
752 | "suggest explicit braces around empty body in %<do%> statement"); | |
ad321293 MM |
753 | } |
754 | ||
755 | /* Finish a do-statement, which may be given by DO_STMT, and whose | |
756 | COND is as indicated. */ | |
757 | ||
758 | void | |
3a978d72 | 759 | finish_do_stmt (tree cond, tree do_stmt) |
ad321293 | 760 | { |
ed5511d9 | 761 | cond = maybe_convert_cond (cond); |
35b1567d BC |
762 | DO_COND (do_stmt) = cond; |
763 | finish_stmt (); | |
764 | } | |
ed5511d9 | 765 | |
ad321293 MM |
766 | /* Finish a return-statement. The EXPRESSION returned, if any, is as |
767 | indicated. */ | |
768 | ||
3e4d04a1 | 769 | tree |
3a978d72 | 770 | finish_return_stmt (tree expr) |
ad321293 | 771 | { |
3e4d04a1 | 772 | tree r; |
0c9b182b | 773 | bool no_warning; |
3e4d04a1 | 774 | |
0c9b182b | 775 | expr = check_return_expr (expr, &no_warning); |
1799e5d5 RH |
776 | |
777 | if (flag_openmp && !check_omp_return ()) | |
778 | return error_mark_node; | |
35b1567d | 779 | if (!processing_template_decl) |
efee38a9 | 780 | { |
d4033c81 MLI |
781 | if (warn_sequence_point) |
782 | verify_sequence_points (expr); | |
783 | ||
44d10c10 | 784 | if (DECL_DESTRUCTOR_P (current_function_decl) |
c8094d83 | 785 | || (DECL_CONSTRUCTOR_P (current_function_decl) |
44d10c10 | 786 | && targetm.cxx.cdtor_returns_this ())) |
efee38a9 MM |
787 | { |
788 | /* Similarly, all destructors must run destructors for | |
789 | base-classes before returning. So, all returns in a | |
dfbb4f34 | 790 | destructor get sent to the DTOR_LABEL; finish_function emits |
efee38a9 | 791 | code to return a value there. */ |
44d10c10 | 792 | return finish_goto_stmt (cdtor_label); |
efee38a9 MM |
793 | } |
794 | } | |
543a0daa | 795 | |
c2255bc4 | 796 | r = build_stmt (input_location, RETURN_EXPR, expr); |
0c9b182b | 797 | TREE_NO_WARNING (r) |= no_warning; |
0ad28dde | 798 | r = maybe_cleanup_point_expr_void (r); |
543a0daa | 799 | r = add_stmt (r); |
35b1567d | 800 | finish_stmt (); |
3e4d04a1 RH |
801 | |
802 | return r; | |
35b1567d | 803 | } |
efee38a9 | 804 | |
ad321293 MM |
805 | /* Begin a for-statement. Returns a new FOR_STMT if appropriate. */ |
806 | ||
807 | tree | |
3a978d72 | 808 | begin_for_stmt (void) |
ad321293 MM |
809 | { |
810 | tree r; | |
811 | ||
c2255bc4 | 812 | r = build_stmt (input_location, FOR_STMT, NULL_TREE, NULL_TREE, |
0dfdeca6 | 813 | NULL_TREE, NULL_TREE); |
325c3691 RH |
814 | |
815 | if (flag_new_for_scope > 0) | |
816 | TREE_CHAIN (r) = do_pushlevel (sk_for); | |
ad321293 | 817 | |
894ca2c9 RH |
818 | if (processing_template_decl) |
819 | FOR_INIT_STMT (r) = push_stmt_list (); | |
820 | ||
ad321293 MM |
821 | return r; |
822 | } | |
823 | ||
824 | /* Finish the for-init-statement of a for-statement, which may be | |
825 | given by FOR_STMT. */ | |
826 | ||
827 | void | |
3a978d72 | 828 | finish_for_init_stmt (tree for_stmt) |
ad321293 | 829 | { |
894ca2c9 RH |
830 | if (processing_template_decl) |
831 | FOR_INIT_STMT (for_stmt) = pop_stmt_list (FOR_INIT_STMT (for_stmt)); | |
325c3691 RH |
832 | add_stmt (for_stmt); |
833 | FOR_BODY (for_stmt) = do_pushlevel (sk_block); | |
caf2523d | 834 | begin_cond (&FOR_COND (for_stmt)); |
ad321293 MM |
835 | } |
836 | ||
837 | /* Finish the COND of a for-statement, which may be given by | |
838 | FOR_STMT. */ | |
839 | ||
840 | void | |
3a978d72 | 841 | finish_for_cond (tree cond, tree for_stmt) |
ad321293 | 842 | { |
caf2523d RH |
843 | finish_cond (&FOR_COND (for_stmt), maybe_convert_cond (cond)); |
844 | simplify_loop_decl_cond (&FOR_COND (for_stmt), FOR_BODY (for_stmt)); | |
ad321293 MM |
845 | } |
846 | ||
847 | /* Finish the increment-EXPRESSION in a for-statement, which may be | |
848 | given by FOR_STMT. */ | |
849 | ||
850 | void | |
3a978d72 | 851 | finish_for_expr (tree expr, tree for_stmt) |
ad321293 | 852 | { |
543a0daa RH |
853 | if (!expr) |
854 | return; | |
6f69173e MM |
855 | /* If EXPR is an overloaded function, issue an error; there is no |
856 | context available to use to perform overload resolution. */ | |
543a0daa | 857 | if (type_unknown_p (expr)) |
6f69173e MM |
858 | { |
859 | cxx_incomplete_type_error (expr, TREE_TYPE (expr)); | |
860 | expr = error_mark_node; | |
861 | } | |
bcd46a7c AP |
862 | if (!processing_template_decl) |
863 | { | |
864 | if (warn_sequence_point) | |
0cbd7506 | 865 | verify_sequence_points (expr); |
ebeb2c24 | 866 | expr = convert_to_void (expr, ICV_THIRD_IN_FOR, |
5ade1ed2 | 867 | tf_warning_or_error); |
bcd46a7c AP |
868 | } |
869 | else if (!type_dependent_expression_p (expr)) | |
ebeb2c24 | 870 | convert_to_void (build_non_dependent_expr (expr), ICV_THIRD_IN_FOR, |
5ade1ed2 | 871 | tf_warning_or_error); |
0ad28dde | 872 | expr = maybe_cleanup_point_expr_void (expr); |
7b3e2d46 | 873 | if (check_for_bare_parameter_packs (expr)) |
4439d02f | 874 | expr = error_mark_node; |
35b1567d | 875 | FOR_EXPR (for_stmt) = expr; |
ad321293 MM |
876 | } |
877 | ||
878 | /* Finish the body of a for-statement, which may be given by | |
879 | FOR_STMT. The increment-EXPR for the loop must be | |
f9132eb7 RRC |
880 | provided. |
881 | It can also finish RANGE_FOR_STMT. */ | |
ad321293 MM |
882 | |
883 | void | |
3a978d72 | 884 | finish_for_stmt (tree for_stmt) |
ad321293 | 885 | { |
f9132eb7 | 886 | if (TREE_CODE (for_stmt) == RANGE_FOR_STMT) |
a8733ebf | 887 | RANGE_FOR_BODY (for_stmt) = do_poplevel (RANGE_FOR_BODY (for_stmt)); |
f9132eb7 | 888 | else |
a8733ebf | 889 | FOR_BODY (for_stmt) = do_poplevel (FOR_BODY (for_stmt)); |
325c3691 | 890 | |
ad321293 | 891 | /* Pop the scope for the body of the loop. */ |
a8733ebf | 892 | if (flag_new_for_scope > 0) |
325c3691 RH |
893 | { |
894 | tree scope = TREE_CHAIN (for_stmt); | |
895 | TREE_CHAIN (for_stmt) = NULL; | |
896 | add_stmt (do_poplevel (scope)); | |
897 | } | |
898 | ||
c8094d83 | 899 | finish_stmt (); |
ad321293 MM |
900 | } |
901 | ||
f9132eb7 RRC |
902 | /* Begin a range-for-statement. Returns a new RANGE_FOR_STMT. |
903 | To finish it call finish_for_stmt(). */ | |
904 | ||
905 | tree | |
906 | begin_range_for_stmt (void) | |
907 | { | |
908 | tree r; | |
a8733ebf | 909 | |
f9132eb7 RRC |
910 | r = build_stmt (input_location, RANGE_FOR_STMT, |
911 | NULL_TREE, NULL_TREE, NULL_TREE); | |
a8733ebf RRC |
912 | |
913 | if (flag_new_for_scope > 0) | |
914 | TREE_CHAIN (r) = do_pushlevel (sk_for); | |
f9132eb7 RRC |
915 | |
916 | return r; | |
917 | } | |
918 | ||
919 | /* Finish the head of a range-based for statement, which may | |
920 | be given by RANGE_FOR_STMT. DECL must be the declaration | |
921 | and EXPR must be the loop expression. */ | |
922 | ||
923 | void | |
924 | finish_range_for_decl (tree range_for_stmt, tree decl, tree expr) | |
925 | { | |
926 | RANGE_FOR_DECL (range_for_stmt) = decl; | |
927 | RANGE_FOR_EXPR (range_for_stmt) = expr; | |
928 | add_stmt (range_for_stmt); | |
929 | RANGE_FOR_BODY (range_for_stmt) = do_pushlevel (sk_block); | |
930 | } | |
931 | ||
ad321293 MM |
932 | /* Finish a break-statement. */ |
933 | ||
3e4d04a1 | 934 | tree |
3a978d72 | 935 | finish_break_stmt (void) |
ad321293 | 936 | { |
c2255bc4 | 937 | return add_stmt (build_stmt (input_location, BREAK_STMT)); |
35b1567d BC |
938 | } |
939 | ||
ad321293 MM |
940 | /* Finish a continue-statement. */ |
941 | ||
3e4d04a1 | 942 | tree |
3a978d72 | 943 | finish_continue_stmt (void) |
ad321293 | 944 | { |
c2255bc4 | 945 | return add_stmt (build_stmt (input_location, CONTINUE_STMT)); |
ad321293 MM |
946 | } |
947 | ||
35b1567d BC |
948 | /* Begin a switch-statement. Returns a new SWITCH_STMT if |
949 | appropriate. */ | |
950 | ||
951 | tree | |
3a978d72 | 952 | begin_switch_stmt (void) |
35b1567d | 953 | { |
325c3691 RH |
954 | tree r, scope; |
955 | ||
c2255bc4 | 956 | r = build_stmt (input_location, SWITCH_STMT, NULL_TREE, NULL_TREE, NULL_TREE); |
325c3691 RH |
957 | |
958 | scope = do_pushlevel (sk_block); | |
959 | TREE_CHAIN (r) = scope; | |
ebaae582 | 960 | begin_cond (&SWITCH_STMT_COND (r)); |
325c3691 | 961 | |
527f0080 | 962 | return r; |
ad321293 MM |
963 | } |
964 | ||
527f0080 | 965 | /* Finish the cond of a switch-statement. */ |
ad321293 | 966 | |
527f0080 | 967 | void |
3a978d72 | 968 | finish_switch_cond (tree cond, tree switch_stmt) |
ad321293 | 969 | { |
6f9fdf4d | 970 | tree orig_type = NULL; |
35b1567d | 971 | if (!processing_template_decl) |
373eb3b3 | 972 | { |
35b1567d | 973 | /* Convert the condition to an integer or enumeration type. */ |
b746c5dc | 974 | cond = build_expr_type_conversion (WANT_INT | WANT_ENUM, cond, true); |
35b1567d | 975 | if (cond == NULL_TREE) |
373eb3b3 | 976 | { |
35b1567d BC |
977 | error ("switch quantity not an integer"); |
978 | cond = error_mark_node; | |
979 | } | |
6f9fdf4d | 980 | orig_type = TREE_TYPE (cond); |
35b1567d BC |
981 | if (cond != error_mark_node) |
982 | { | |
0a72704b MM |
983 | /* [stmt.switch] |
984 | ||
985 | Integral promotions are performed. */ | |
986 | cond = perform_integral_promotions (cond); | |
543a0daa | 987 | cond = maybe_cleanup_point_expr (cond); |
373eb3b3 | 988 | } |
ad321293 | 989 | } |
7b3e2d46 | 990 | if (check_for_bare_parameter_packs (cond)) |
4439d02f | 991 | cond = error_mark_node; |
d4033c81 MLI |
992 | else if (!processing_template_decl && warn_sequence_point) |
993 | verify_sequence_points (cond); | |
994 | ||
ebaae582 SB |
995 | finish_cond (&SWITCH_STMT_COND (switch_stmt), cond); |
996 | SWITCH_STMT_TYPE (switch_stmt) = orig_type; | |
caf2523d | 997 | add_stmt (switch_stmt); |
56cb9733 | 998 | push_switch (switch_stmt); |
ebaae582 | 999 | SWITCH_STMT_BODY (switch_stmt) = push_stmt_list (); |
ad321293 MM |
1000 | } |
1001 | ||
1002 | /* Finish the body of a switch-statement, which may be given by | |
1003 | SWITCH_STMT. The COND to switch on is indicated. */ | |
1004 | ||
1005 | void | |
3a978d72 | 1006 | finish_switch_stmt (tree switch_stmt) |
ad321293 | 1007 | { |
325c3691 RH |
1008 | tree scope; |
1009 | ||
ebaae582 SB |
1010 | SWITCH_STMT_BODY (switch_stmt) = |
1011 | pop_stmt_list (SWITCH_STMT_BODY (switch_stmt)); | |
c8094d83 | 1012 | pop_switch (); |
ad321293 | 1013 | finish_stmt (); |
325c3691 RH |
1014 | |
1015 | scope = TREE_CHAIN (switch_stmt); | |
1016 | TREE_CHAIN (switch_stmt) = NULL; | |
1017 | add_stmt (do_poplevel (scope)); | |
ad321293 MM |
1018 | } |
1019 | ||
ad321293 MM |
1020 | /* Begin a try-block. Returns a newly-created TRY_BLOCK if |
1021 | appropriate. */ | |
1022 | ||
1023 | tree | |
3a978d72 | 1024 | begin_try_block (void) |
ad321293 | 1025 | { |
c2255bc4 | 1026 | tree r = build_stmt (input_location, TRY_BLOCK, NULL_TREE, NULL_TREE); |
ae499cce | 1027 | add_stmt (r); |
325c3691 | 1028 | TRY_STMTS (r) = push_stmt_list (); |
35b1567d | 1029 | return r; |
ad321293 MM |
1030 | } |
1031 | ||
eaf6fb90 MM |
1032 | /* Likewise, for a function-try-block. The block returned in |
1033 | *COMPOUND_STMT is an artificial outer scope, containing the | |
1034 | function-try-block. */ | |
0dde4175 JM |
1035 | |
1036 | tree | |
eaf6fb90 | 1037 | begin_function_try_block (tree *compound_stmt) |
0dde4175 | 1038 | { |
eaf6fb90 MM |
1039 | tree r; |
1040 | /* This outer scope does not exist in the C++ standard, but we need | |
1041 | a place to put __FUNCTION__ and similar variables. */ | |
1042 | *compound_stmt = begin_compound_stmt (0); | |
1043 | r = begin_try_block (); | |
35b1567d | 1044 | FN_TRY_BLOCK_P (r) = 1; |
35b1567d | 1045 | return r; |
0dde4175 JM |
1046 | } |
1047 | ||
ad321293 MM |
1048 | /* Finish a try-block, which may be given by TRY_BLOCK. */ |
1049 | ||
1050 | void | |
3a978d72 | 1051 | finish_try_block (tree try_block) |
ad321293 | 1052 | { |
325c3691 RH |
1053 | TRY_STMTS (try_block) = pop_stmt_list (TRY_STMTS (try_block)); |
1054 | TRY_HANDLERS (try_block) = push_stmt_list (); | |
ad321293 MM |
1055 | } |
1056 | ||
efa8eda3 MM |
1057 | /* Finish the body of a cleanup try-block, which may be given by |
1058 | TRY_BLOCK. */ | |
1059 | ||
62409b39 | 1060 | void |
3a978d72 | 1061 | finish_cleanup_try_block (tree try_block) |
62409b39 | 1062 | { |
325c3691 | 1063 | TRY_STMTS (try_block) = pop_stmt_list (TRY_STMTS (try_block)); |
62409b39 MM |
1064 | } |
1065 | ||
f1dedc31 MM |
1066 | /* Finish an implicitly generated try-block, with a cleanup is given |
1067 | by CLEANUP. */ | |
1068 | ||
1069 | void | |
3a978d72 | 1070 | finish_cleanup (tree cleanup, tree try_block) |
f1dedc31 | 1071 | { |
35b1567d BC |
1072 | TRY_HANDLERS (try_block) = cleanup; |
1073 | CLEANUP_P (try_block) = 1; | |
f1dedc31 MM |
1074 | } |
1075 | ||
0dde4175 JM |
1076 | /* Likewise, for a function-try-block. */ |
1077 | ||
1078 | void | |
3a978d72 | 1079 | finish_function_try_block (tree try_block) |
0dde4175 | 1080 | { |
325c3691 RH |
1081 | finish_try_block (try_block); |
1082 | /* FIXME : something queer about CTOR_INITIALIZER somehow following | |
1083 | the try block, but moving it inside. */ | |
b35d4555 | 1084 | in_function_try_handler = 1; |
0dde4175 JM |
1085 | } |
1086 | ||
ad321293 MM |
1087 | /* Finish a handler-sequence for a try-block, which may be given by |
1088 | TRY_BLOCK. */ | |
1089 | ||
1090 | void | |
3a978d72 | 1091 | finish_handler_sequence (tree try_block) |
ad321293 | 1092 | { |
325c3691 | 1093 | TRY_HANDLERS (try_block) = pop_stmt_list (TRY_HANDLERS (try_block)); |
35b1567d | 1094 | check_handlers (TRY_HANDLERS (try_block)); |
ad321293 MM |
1095 | } |
1096 | ||
eaf6fb90 MM |
1097 | /* Finish the handler-seq for a function-try-block, given by |
1098 | TRY_BLOCK. COMPOUND_STMT is the outer block created by | |
1099 | begin_function_try_block. */ | |
0dde4175 JM |
1100 | |
1101 | void | |
eaf6fb90 | 1102 | finish_function_handler_sequence (tree try_block, tree compound_stmt) |
0dde4175 | 1103 | { |
b35d4555 | 1104 | in_function_try_handler = 0; |
325c3691 | 1105 | finish_handler_sequence (try_block); |
eaf6fb90 | 1106 | finish_compound_stmt (compound_stmt); |
35b1567d BC |
1107 | } |
1108 | ||
ad321293 MM |
1109 | /* Begin a handler. Returns a HANDLER if appropriate. */ |
1110 | ||
1111 | tree | |
3a978d72 | 1112 | begin_handler (void) |
ad321293 MM |
1113 | { |
1114 | tree r; | |
325c3691 | 1115 | |
c2255bc4 | 1116 | r = build_stmt (input_location, HANDLER, NULL_TREE, NULL_TREE); |
ae499cce | 1117 | add_stmt (r); |
325c3691 | 1118 | |
1a6025b4 JM |
1119 | /* Create a binding level for the eh_info and the exception object |
1120 | cleanup. */ | |
325c3691 RH |
1121 | HANDLER_BODY (r) = do_pushlevel (sk_catch); |
1122 | ||
ad321293 MM |
1123 | return r; |
1124 | } | |
1125 | ||
1126 | /* Finish the handler-parameters for a handler, which may be given by | |
b35d4555 MM |
1127 | HANDLER. DECL is the declaration for the catch parameter, or NULL |
1128 | if this is a `catch (...)' clause. */ | |
ad321293 | 1129 | |
1a6025b4 | 1130 | void |
3a978d72 | 1131 | finish_handler_parms (tree decl, tree handler) |
b35d4555 | 1132 | { |
1a6025b4 | 1133 | tree type = NULL_TREE; |
b35d4555 MM |
1134 | if (processing_template_decl) |
1135 | { | |
1136 | if (decl) | |
1137 | { | |
1138 | decl = pushdecl (decl); | |
1139 | decl = push_template_decl (decl); | |
325c3691 | 1140 | HANDLER_PARMS (handler) = decl; |
1a6025b4 | 1141 | type = TREE_TYPE (decl); |
b35d4555 MM |
1142 | } |
1143 | } | |
35b1567d | 1144 | else |
1a6025b4 | 1145 | type = expand_start_catch_block (decl); |
1a6025b4 | 1146 | HANDLER_TYPE (handler) = type; |
b80cfdcd | 1147 | if (!processing_template_decl && type) |
6cad4e17 | 1148 | mark_used (eh_type_info (type)); |
35b1567d BC |
1149 | } |
1150 | ||
1151 | /* Finish a handler, which may be given by HANDLER. The BLOCKs are | |
1152 | the return value from the matching call to finish_handler_parms. */ | |
1153 | ||
1154 | void | |
3a978d72 | 1155 | finish_handler (tree handler) |
35b1567d BC |
1156 | { |
1157 | if (!processing_template_decl) | |
1a6025b4 | 1158 | expand_end_catch_block (); |
325c3691 | 1159 | HANDLER_BODY (handler) = do_poplevel (HANDLER_BODY (handler)); |
35b1567d BC |
1160 | } |
1161 | ||
5882f0f3 | 1162 | /* Begin a compound statement. FLAGS contains some bits that control the |
5995ebfb | 1163 | behavior and context. If BCS_NO_SCOPE is set, the compound statement |
5882f0f3 | 1164 | does not define a scope. If BCS_FN_BODY is set, this is the outermost |
c8094d83 | 1165 | block of a function. If BCS_TRY_BLOCK is set, this is the block |
5882f0f3 RH |
1166 | created on behalf of a TRY statement. Returns a token to be passed to |
1167 | finish_compound_stmt. */ | |
ad321293 MM |
1168 | |
1169 | tree | |
325c3691 | 1170 | begin_compound_stmt (unsigned int flags) |
ad321293 | 1171 | { |
325c3691 | 1172 | tree r; |
558475f0 | 1173 | |
325c3691 RH |
1174 | if (flags & BCS_NO_SCOPE) |
1175 | { | |
1176 | r = push_stmt_list (); | |
1177 | STATEMENT_LIST_NO_SCOPE (r) = 1; | |
1178 | ||
1179 | /* Normally, we try hard to keep the BLOCK for a statement-expression. | |
1180 | But, if it's a statement-expression with a scopeless block, there's | |
1181 | nothing to keep, and we don't want to accidentally keep a block | |
c8094d83 | 1182 | *inside* the scopeless block. */ |
325c3691 RH |
1183 | keep_next_level (false); |
1184 | } | |
f1dedc31 | 1185 | else |
325c3691 RH |
1186 | r = do_pushlevel (flags & BCS_TRY_BLOCK ? sk_try : sk_block); |
1187 | ||
5882f0f3 RH |
1188 | /* When processing a template, we need to remember where the braces were, |
1189 | so that we can set up identical scopes when instantiating the template | |
1190 | later. BIND_EXPR is a handy candidate for this. | |
1191 | Note that do_poplevel won't create a BIND_EXPR itself here (and thus | |
1192 | result in nested BIND_EXPRs), since we don't build BLOCK nodes when | |
1193 | processing templates. */ | |
1194 | if (processing_template_decl) | |
325c3691 | 1195 | { |
f293ce4b | 1196 | r = build3 (BIND_EXPR, NULL, NULL, r, NULL); |
5882f0f3 RH |
1197 | BIND_EXPR_TRY_BLOCK (r) = (flags & BCS_TRY_BLOCK) != 0; |
1198 | BIND_EXPR_BODY_BLOCK (r) = (flags & BCS_FN_BODY) != 0; | |
325c3691 RH |
1199 | TREE_SIDE_EFFECTS (r) = 1; |
1200 | } | |
ad321293 MM |
1201 | |
1202 | return r; | |
1203 | } | |
1204 | ||
5882f0f3 | 1205 | /* Finish a compound-statement, which is given by STMT. */ |
ad321293 | 1206 | |
325c3691 RH |
1207 | void |
1208 | finish_compound_stmt (tree stmt) | |
ad321293 | 1209 | { |
5882f0f3 | 1210 | if (TREE_CODE (stmt) == BIND_EXPR) |
e02927a1 JM |
1211 | { |
1212 | tree body = do_poplevel (BIND_EXPR_BODY (stmt)); | |
1213 | /* If the STATEMENT_LIST is empty and this BIND_EXPR isn't special, | |
1214 | discard the BIND_EXPR so it can be merged with the containing | |
1215 | STATEMENT_LIST. */ | |
1216 | if (TREE_CODE (body) == STATEMENT_LIST | |
1217 | && STATEMENT_LIST_HEAD (body) == NULL | |
1218 | && !BIND_EXPR_BODY_BLOCK (stmt) | |
1219 | && !BIND_EXPR_TRY_BLOCK (stmt)) | |
1220 | stmt = body; | |
1221 | else | |
1222 | BIND_EXPR_BODY (stmt) = body; | |
1223 | } | |
325c3691 RH |
1224 | else if (STATEMENT_LIST_NO_SCOPE (stmt)) |
1225 | stmt = pop_stmt_list (stmt); | |
7a3397c7 | 1226 | else |
5f070bc7 ZL |
1227 | { |
1228 | /* Destroy any ObjC "super" receivers that may have been | |
1229 | created. */ | |
1230 | objc_clear_super_receiver (); | |
1231 | ||
1232 | stmt = do_poplevel (stmt); | |
1233 | } | |
ad321293 | 1234 | |
325c3691 RH |
1235 | /* ??? See c_end_compound_stmt wrt statement expressions. */ |
1236 | add_stmt (stmt); | |
ad321293 | 1237 | finish_stmt (); |
ad321293 MM |
1238 | } |
1239 | ||
6de9cd9a | 1240 | /* Finish an asm-statement, whose components are a STRING, some |
1c384bf1 RH |
1241 | OUTPUT_OPERANDS, some INPUT_OPERANDS, some CLOBBERS and some |
1242 | LABELS. Also note whether the asm-statement should be | |
1243 | considered volatile. */ | |
7dc5bd62 | 1244 | |
3e4d04a1 | 1245 | tree |
6de9cd9a | 1246 | finish_asm_stmt (int volatile_p, tree string, tree output_operands, |
1c384bf1 | 1247 | tree input_operands, tree clobbers, tree labels) |
35b1567d BC |
1248 | { |
1249 | tree r; | |
abfc8a36 | 1250 | tree t; |
5544530a PB |
1251 | int ninputs = list_length (input_operands); |
1252 | int noutputs = list_length (output_operands); | |
abfc8a36 | 1253 | |
abfc8a36 | 1254 | if (!processing_template_decl) |
40b18c0a | 1255 | { |
74f0c611 RH |
1256 | const char *constraint; |
1257 | const char **oconstraints; | |
1258 | bool allows_mem, allows_reg, is_inout; | |
1259 | tree operand; | |
40b18c0a | 1260 | int i; |
40b18c0a | 1261 | |
86b8fed1 | 1262 | oconstraints = XALLOCAVEC (const char *, noutputs); |
74f0c611 RH |
1263 | |
1264 | string = resolve_asm_operand_names (string, output_operands, | |
1c384bf1 | 1265 | input_operands, labels); |
74f0c611 RH |
1266 | |
1267 | for (i = 0, t = output_operands; t; t = TREE_CHAIN (t), ++i) | |
40b18c0a | 1268 | { |
74f0c611 RH |
1269 | operand = TREE_VALUE (t); |
1270 | ||
1271 | /* ??? Really, this should not be here. Users should be using a | |
1272 | proper lvalue, dammit. But there's a long history of using | |
1273 | casts in the output operands. In cases like longlong.h, this | |
1274 | becomes a primitive form of typechecking -- if the cast can be | |
1275 | removed, then the output operand had a type of the proper width; | |
1276 | otherwise we'll get an error. Gross, but ... */ | |
1277 | STRIP_NOPS (operand); | |
1278 | ||
03a904b5 JJ |
1279 | operand = mark_lvalue_use (operand); |
1280 | ||
5ade1ed2 | 1281 | if (!lvalue_or_else (operand, lv_asm, tf_warning_or_error)) |
74f0c611 RH |
1282 | operand = error_mark_node; |
1283 | ||
3db45ab5 | 1284 | if (operand != error_mark_node |
5544530a PB |
1285 | && (TREE_READONLY (operand) |
1286 | || CP_TYPE_CONST_P (TREE_TYPE (operand)) | |
3db45ab5 MS |
1287 | /* Functions are not modifiable, even though they are |
1288 | lvalues. */ | |
1289 | || TREE_CODE (TREE_TYPE (operand)) == FUNCTION_TYPE | |
1290 | || TREE_CODE (TREE_TYPE (operand)) == METHOD_TYPE | |
1291 | /* If it's an aggregate and any field is const, then it is | |
1292 | effectively const. */ | |
1293 | || (CLASS_TYPE_P (TREE_TYPE (operand)) | |
1294 | && C_TYPE_FIELDS_READONLY (TREE_TYPE (operand))))) | |
4cd5a50a | 1295 | readonly_error (operand, REK_ASSIGNMENT_ASM); |
5544530a | 1296 | |
74f0c611 RH |
1297 | constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); |
1298 | oconstraints[i] = constraint; | |
1299 | ||
1300 | if (parse_output_constraint (&constraint, i, ninputs, noutputs, | |
1301 | &allows_mem, &allows_reg, &is_inout)) | |
1302 | { | |
1303 | /* If the operand is going to end up in memory, | |
1304 | mark it addressable. */ | |
1305 | if (!allows_reg && !cxx_mark_addressable (operand)) | |
1306 | operand = error_mark_node; | |
1307 | } | |
1308 | else | |
1309 | operand = error_mark_node; | |
1310 | ||
1311 | TREE_VALUE (t) = operand; | |
1312 | } | |
1313 | ||
1314 | for (i = 0, t = input_operands; t; ++i, t = TREE_CHAIN (t)) | |
1315 | { | |
1316 | constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); | |
c8094d83 | 1317 | operand = decay_conversion (TREE_VALUE (t)); |
74f0c611 | 1318 | |
40b18c0a MM |
1319 | /* If the type of the operand hasn't been determined (e.g., |
1320 | because it involves an overloaded function), then issue | |
1321 | an error message. There's no context available to | |
1322 | resolve the overloading. */ | |
74f0c611 | 1323 | if (TREE_TYPE (operand) == unknown_type_node) |
40b18c0a | 1324 | { |
c8094d83 | 1325 | error ("type of asm operand %qE could not be determined", |
0cbd7506 | 1326 | TREE_VALUE (t)); |
74f0c611 | 1327 | operand = error_mark_node; |
40b18c0a | 1328 | } |
40b18c0a | 1329 | |
74f0c611 RH |
1330 | if (parse_input_constraint (&constraint, i, ninputs, noutputs, 0, |
1331 | oconstraints, &allows_mem, &allows_reg)) | |
40b18c0a | 1332 | { |
74f0c611 RH |
1333 | /* If the operand is going to end up in memory, |
1334 | mark it addressable. */ | |
b4c33883 AP |
1335 | if (!allows_reg && allows_mem) |
1336 | { | |
1337 | /* Strip the nops as we allow this case. FIXME, this really | |
1338 | should be rejected or made deprecated. */ | |
1339 | STRIP_NOPS (operand); | |
1340 | if (!cxx_mark_addressable (operand)) | |
1341 | operand = error_mark_node; | |
1342 | } | |
40b18c0a | 1343 | } |
74f0c611 RH |
1344 | else |
1345 | operand = error_mark_node; | |
40b18c0a | 1346 | |
74f0c611 | 1347 | TREE_VALUE (t) = operand; |
40b18c0a MM |
1348 | } |
1349 | } | |
abfc8a36 | 1350 | |
c2255bc4 | 1351 | r = build_stmt (input_location, ASM_EXPR, string, |
0dfdeca6 | 1352 | output_operands, input_operands, |
1c384bf1 | 1353 | clobbers, labels); |
5544530a | 1354 | ASM_VOLATILE_P (r) = volatile_p || noutputs == 0; |
0ad28dde | 1355 | r = maybe_cleanup_point_expr_void (r); |
3e4d04a1 | 1356 | return add_stmt (r); |
ad321293 | 1357 | } |
b4c4a9ec | 1358 | |
5bca4e80 | 1359 | /* Finish a label with the indicated NAME. Returns the new label. */ |
f01b0acb | 1360 | |
a723baf1 | 1361 | tree |
3a978d72 | 1362 | finish_label_stmt (tree name) |
f01b0acb | 1363 | { |
5b030314 | 1364 | tree decl = define_label (input_location, name); |
417fa55b | 1365 | |
5bca4e80 | 1366 | if (decl == error_mark_node) |
417fa55b LM |
1367 | return error_mark_node; |
1368 | ||
c2255bc4 | 1369 | add_stmt (build_stmt (input_location, LABEL_EXPR, decl)); |
5bca4e80 ILT |
1370 | |
1371 | return decl; | |
f01b0acb MM |
1372 | } |
1373 | ||
acef433b MM |
1374 | /* Finish a series of declarations for local labels. G++ allows users |
1375 | to declare "local" labels, i.e., labels with scope. This extension | |
1376 | is useful when writing code involving statement-expressions. */ | |
1377 | ||
1378 | void | |
3a978d72 | 1379 | finish_label_decl (tree name) |
acef433b | 1380 | { |
a6d76a95 PC |
1381 | if (!at_function_scope_p ()) |
1382 | { | |
1383 | error ("__label__ declarations are only allowed in function scopes"); | |
1384 | return; | |
1385 | } | |
1386 | ||
1387 | add_decl_expr (declare_local_label (name)); | |
acef433b MM |
1388 | } |
1389 | ||
659e5a7a | 1390 | /* When DECL goes out of scope, make sure that CLEANUP is executed. */ |
f1dedc31 | 1391 | |
c8094d83 | 1392 | void |
3a978d72 | 1393 | finish_decl_cleanup (tree decl, tree cleanup) |
f1dedc31 | 1394 | { |
325c3691 | 1395 | push_cleanup (decl, cleanup, false); |
35b1567d BC |
1396 | } |
1397 | ||
659e5a7a | 1398 | /* If the current scope exits with an exception, run CLEANUP. */ |
24bef158 | 1399 | |
659e5a7a | 1400 | void |
3a978d72 | 1401 | finish_eh_cleanup (tree cleanup) |
24bef158 | 1402 | { |
325c3691 | 1403 | push_cleanup (NULL, cleanup, true); |
35b1567d BC |
1404 | } |
1405 | ||
2282d28d MM |
1406 | /* The MEM_INITS is a list of mem-initializers, in reverse of the |
1407 | order they were written by the user. Each node is as for | |
1408 | emit_mem_initializers. */ | |
bf3428d0 MM |
1409 | |
1410 | void | |
2282d28d | 1411 | finish_mem_initializers (tree mem_inits) |
bf3428d0 | 1412 | { |
2282d28d MM |
1413 | /* Reorder the MEM_INITS so that they are in the order they appeared |
1414 | in the source program. */ | |
1415 | mem_inits = nreverse (mem_inits); | |
bf3428d0 | 1416 | |
a0de9d20 | 1417 | if (processing_template_decl) |
5d80a306 DG |
1418 | { |
1419 | tree mem; | |
1420 | ||
1421 | for (mem = mem_inits; mem; mem = TREE_CHAIN (mem)) | |
1422 | { | |
1423 | /* If the TREE_PURPOSE is a TYPE_PACK_EXPANSION, skip the | |
1424 | check for bare parameter packs in the TREE_VALUE, because | |
1425 | any parameter packs in the TREE_VALUE have already been | |
1426 | bound as part of the TREE_PURPOSE. See | |
1427 | make_pack_expansion for more information. */ | |
4439d02f | 1428 | if (TREE_CODE (TREE_PURPOSE (mem)) != TYPE_PACK_EXPANSION |
7b3e2d46 | 1429 | && check_for_bare_parameter_packs (TREE_VALUE (mem))) |
4439d02f | 1430 | TREE_VALUE (mem) = error_mark_node; |
5d80a306 DG |
1431 | } |
1432 | ||
1433 | add_stmt (build_min_nt (CTOR_INITIALIZER, mem_inits)); | |
1434 | } | |
cdd2559c | 1435 | else |
2282d28d | 1436 | emit_mem_initializers (mem_inits); |
558475f0 MM |
1437 | } |
1438 | ||
b4c4a9ec MM |
1439 | /* Finish a parenthesized expression EXPR. */ |
1440 | ||
1441 | tree | |
3a978d72 | 1442 | finish_parenthesized_expr (tree expr) |
b4c4a9ec | 1443 | { |
6615c446 | 1444 | if (EXPR_P (expr)) |
78ef5b89 | 1445 | /* This inhibits warnings in c_common_truthvalue_conversion. */ |
31ec7d2f | 1446 | TREE_NO_WARNING (expr) = 1; |
b4c4a9ec | 1447 | |
19420d00 NS |
1448 | if (TREE_CODE (expr) == OFFSET_REF) |
1449 | /* [expr.unary.op]/3 The qualified id of a pointer-to-member must not be | |
1450 | enclosed in parentheses. */ | |
1451 | PTRMEM_OK_P (expr) = 0; | |
c8094d83 | 1452 | |
7a8380ae NS |
1453 | if (TREE_CODE (expr) == STRING_CST) |
1454 | PAREN_STRING_LITERAL_P (expr) = 1; | |
c8094d83 | 1455 | |
b4c4a9ec MM |
1456 | return expr; |
1457 | } | |
1458 | ||
a723baf1 MM |
1459 | /* Finish a reference to a non-static data member (DECL) that is not |
1460 | preceded by `.' or `->'. */ | |
1461 | ||
1462 | tree | |
a3f10e50 | 1463 | finish_non_static_data_member (tree decl, tree object, tree qualifying_scope) |
a723baf1 | 1464 | { |
50bc768d | 1465 | gcc_assert (TREE_CODE (decl) == FIELD_DECL); |
a723baf1 | 1466 | |
2defb926 | 1467 | if (!object) |
51fc2d02 | 1468 | { |
51fc2d02 JM |
1469 | tree scope = qualifying_scope; |
1470 | if (scope == NULL_TREE) | |
1471 | scope = context_for_name_lookup (decl); | |
1472 | object = maybe_dummy_object (scope, NULL); | |
1473 | } | |
1474 | ||
2defb926 JM |
1475 | /* DR 613: Can use non-static data members without an associated |
1476 | object in sizeof/decltype/alignof. */ | |
1477 | if (is_dummy_object (object) && cp_unevaluated_operand == 0 | |
1478 | && (!processing_template_decl || !current_class_ref)) | |
a723baf1 | 1479 | { |
c8094d83 | 1480 | if (current_function_decl |
a723baf1 | 1481 | && DECL_STATIC_FUNCTION_P (current_function_decl)) |
dee15844 | 1482 | error ("invalid use of member %q+D in static member function", decl); |
a723baf1 | 1483 | else |
dee15844 | 1484 | error ("invalid use of non-static data member %q+D", decl); |
a723baf1 MM |
1485 | error ("from this location"); |
1486 | ||
1487 | return error_mark_node; | |
1488 | } | |
d5f4eddd | 1489 | |
51fc2d02 JM |
1490 | if (current_class_ptr) |
1491 | TREE_USED (current_class_ptr) = 1; | |
58e1d54c | 1492 | if (processing_template_decl && !qualifying_scope) |
a723baf1 | 1493 | { |
a3f10e50 | 1494 | tree type = TREE_TYPE (decl); |
a723baf1 | 1495 | |
a3f10e50 NS |
1496 | if (TREE_CODE (type) == REFERENCE_TYPE) |
1497 | type = TREE_TYPE (type); | |
1498 | else | |
1499 | { | |
f4f206f4 | 1500 | /* Set the cv qualifiers. */ |
51fc2d02 JM |
1501 | int quals = (current_class_ref |
1502 | ? cp_type_quals (TREE_TYPE (current_class_ref)) | |
1503 | : TYPE_UNQUALIFIED); | |
c8094d83 | 1504 | |
a3f10e50 NS |
1505 | if (DECL_MUTABLE_P (decl)) |
1506 | quals &= ~TYPE_QUAL_CONST; | |
9e95d15f | 1507 | |
a3f10e50 NS |
1508 | quals |= cp_type_quals (TREE_TYPE (decl)); |
1509 | type = cp_build_qualified_type (type, quals); | |
1510 | } | |
c8094d83 | 1511 | |
44de5aeb | 1512 | return build_min (COMPONENT_REF, type, object, decl, NULL_TREE); |
a3f10e50 | 1513 | } |
ab11c13f JM |
1514 | /* If PROCESSING_TEMPLATE_DECL is nonzero here, then |
1515 | QUALIFYING_SCOPE is also non-null. Wrap this in a SCOPE_REF | |
1516 | for now. */ | |
1517 | else if (processing_template_decl) | |
1518 | return build_qualified_name (TREE_TYPE (decl), | |
1519 | qualifying_scope, | |
1520 | DECL_NAME (decl), | |
1521 | /*template_p=*/false); | |
a3f10e50 NS |
1522 | else |
1523 | { | |
1524 | tree access_type = TREE_TYPE (object); | |
9f01ded6 | 1525 | |
02022f3a SM |
1526 | perform_or_defer_access_check (TYPE_BINFO (access_type), decl, |
1527 | decl); | |
a723baf1 MM |
1528 | |
1529 | /* If the data member was named `C::M', convert `*this' to `C' | |
1530 | first. */ | |
1531 | if (qualifying_scope) | |
1532 | { | |
1533 | tree binfo = NULL_TREE; | |
1534 | object = build_scoped_ref (object, qualifying_scope, | |
1535 | &binfo); | |
1536 | } | |
1537 | ||
1538 | return build_class_member_access_expr (object, decl, | |
1539 | /*access_path=*/NULL_TREE, | |
5ade1ed2 DG |
1540 | /*preserve_reference=*/false, |
1541 | tf_warning_or_error); | |
a723baf1 MM |
1542 | } |
1543 | } | |
1544 | ||
aa373032 DS |
1545 | /* If we are currently parsing a template and we encountered a typedef |
1546 | TYPEDEF_DECL that is being accessed though CONTEXT, this function | |
1547 | adds the typedef to a list tied to the current template. | |
1548 | At tempate instantiatin time, that list is walked and access check | |
1549 | performed for each typedef. | |
1550 | LOCATION is the location of the usage point of TYPEDEF_DECL. */ | |
1551 | ||
1552 | void | |
1553 | add_typedef_to_current_template_for_access_check (tree typedef_decl, | |
1554 | tree context, | |
1555 | location_t location) | |
1556 | { | |
1557 | tree template_info = NULL; | |
1558 | tree cs = current_scope (); | |
1559 | ||
1560 | if (!is_typedef_decl (typedef_decl) | |
1561 | || !context | |
1562 | || !CLASS_TYPE_P (context) | |
1563 | || !cs) | |
1564 | return; | |
1565 | ||
1566 | if (CLASS_TYPE_P (cs) || TREE_CODE (cs) == FUNCTION_DECL) | |
1567 | template_info = get_template_info (cs); | |
1568 | ||
1569 | if (template_info | |
1570 | && TI_TEMPLATE (template_info) | |
1571 | && !currently_open_class (context)) | |
1572 | append_type_to_template_for_access_check (cs, typedef_decl, | |
1573 | context, location); | |
1574 | } | |
1575 | ||
ee76b931 MM |
1576 | /* DECL was the declaration to which a qualified-id resolved. Issue |
1577 | an error message if it is not accessible. If OBJECT_TYPE is | |
1578 | non-NULL, we have just seen `x->' or `x.' and OBJECT_TYPE is the | |
1579 | type of `*x', or `x', respectively. If the DECL was named as | |
1580 | `A::B' then NESTED_NAME_SPECIFIER is `A'. */ | |
1581 | ||
1582 | void | |
c8094d83 MS |
1583 | check_accessibility_of_qualified_id (tree decl, |
1584 | tree object_type, | |
ee76b931 MM |
1585 | tree nested_name_specifier) |
1586 | { | |
1587 | tree scope; | |
1588 | tree qualifying_type = NULL_TREE; | |
95b4aca6 | 1589 | |
d0940d56 DS |
1590 | /* If we are parsing a template declaration and if decl is a typedef, |
1591 | add it to a list tied to the template. | |
1592 | At template instantiation time, that list will be walked and | |
1593 | access check performed. */ | |
aa373032 DS |
1594 | add_typedef_to_current_template_for_access_check (decl, |
1595 | nested_name_specifier | |
1596 | ? nested_name_specifier | |
1597 | : DECL_CONTEXT (decl), | |
1598 | input_location); | |
d0940d56 | 1599 | |
77880ae4 | 1600 | /* If we're not checking, return immediately. */ |
95b4aca6 NS |
1601 | if (deferred_access_no_check) |
1602 | return; | |
c8094d83 | 1603 | |
ee76b931 MM |
1604 | /* Determine the SCOPE of DECL. */ |
1605 | scope = context_for_name_lookup (decl); | |
1606 | /* If the SCOPE is not a type, then DECL is not a member. */ | |
1607 | if (!TYPE_P (scope)) | |
1608 | return; | |
1609 | /* Compute the scope through which DECL is being accessed. */ | |
c8094d83 | 1610 | if (object_type |
ee76b931 MM |
1611 | /* OBJECT_TYPE might not be a class type; consider: |
1612 | ||
1613 | class A { typedef int I; }; | |
1614 | I *p; | |
1615 | p->A::I::~I(); | |
1616 | ||
0cbd7506 | 1617 | In this case, we will have "A::I" as the DECL, but "I" as the |
ee76b931 MM |
1618 | OBJECT_TYPE. */ |
1619 | && CLASS_TYPE_P (object_type) | |
1620 | && DERIVED_FROM_P (scope, object_type)) | |
1621 | /* If we are processing a `->' or `.' expression, use the type of the | |
1622 | left-hand side. */ | |
1623 | qualifying_type = object_type; | |
1624 | else if (nested_name_specifier) | |
1625 | { | |
1626 | /* If the reference is to a non-static member of the | |
1627 | current class, treat it as if it were referenced through | |
1628 | `this'. */ | |
1629 | if (DECL_NONSTATIC_MEMBER_P (decl) | |
1630 | && current_class_ptr | |
1631 | && DERIVED_FROM_P (scope, current_class_type)) | |
1632 | qualifying_type = current_class_type; | |
1633 | /* Otherwise, use the type indicated by the | |
1634 | nested-name-specifier. */ | |
1635 | else | |
1636 | qualifying_type = nested_name_specifier; | |
1637 | } | |
1638 | else | |
1639 | /* Otherwise, the name must be from the current class or one of | |
1640 | its bases. */ | |
1641 | qualifying_type = currently_open_derived_class (scope); | |
1642 | ||
fc429748 MM |
1643 | if (qualifying_type |
1644 | /* It is possible for qualifying type to be a TEMPLATE_TYPE_PARM | |
1645 | or similar in a default argument value. */ | |
1646 | && CLASS_TYPE_P (qualifying_type) | |
1647 | && !dependent_type_p (qualifying_type)) | |
02022f3a SM |
1648 | perform_or_defer_access_check (TYPE_BINFO (qualifying_type), decl, |
1649 | decl); | |
ee76b931 MM |
1650 | } |
1651 | ||
1652 | /* EXPR is the result of a qualified-id. The QUALIFYING_CLASS was the | |
1653 | class named to the left of the "::" operator. DONE is true if this | |
1654 | expression is a complete postfix-expression; it is false if this | |
1655 | expression is followed by '->', '[', '(', etc. ADDRESS_P is true | |
02ed62dd MM |
1656 | iff this expression is the operand of '&'. TEMPLATE_P is true iff |
1657 | the qualified-id was of the form "A::template B". TEMPLATE_ARG_P | |
1658 | is true iff this qualified name appears as a template argument. */ | |
ee76b931 MM |
1659 | |
1660 | tree | |
3db45ab5 MS |
1661 | finish_qualified_id_expr (tree qualifying_class, |
1662 | tree expr, | |
02ed62dd | 1663 | bool done, |
3db45ab5 | 1664 | bool address_p, |
02ed62dd MM |
1665 | bool template_p, |
1666 | bool template_arg_p) | |
ee76b931 | 1667 | { |
d4f0f205 MM |
1668 | gcc_assert (TYPE_P (qualifying_class)); |
1669 | ||
5e08432e MM |
1670 | if (error_operand_p (expr)) |
1671 | return error_mark_node; | |
1672 | ||
7eab6e7b | 1673 | if (DECL_P (expr) || BASELINK_P (expr)) |
d4f0f205 | 1674 | mark_used (expr); |
d4f0f205 | 1675 | |
02ed62dd MM |
1676 | if (template_p) |
1677 | check_template_keyword (expr); | |
1678 | ||
ee76b931 MM |
1679 | /* If EXPR occurs as the operand of '&', use special handling that |
1680 | permits a pointer-to-member. */ | |
1681 | if (address_p && done) | |
1682 | { | |
1683 | if (TREE_CODE (expr) == SCOPE_REF) | |
1684 | expr = TREE_OPERAND (expr, 1); | |
c8094d83 | 1685 | expr = build_offset_ref (qualifying_class, expr, |
a5ac359a | 1686 | /*address_p=*/true); |
ee76b931 MM |
1687 | return expr; |
1688 | } | |
1689 | ||
02ed62dd MM |
1690 | /* Within the scope of a class, turn references to non-static |
1691 | members into expression of the form "this->...". */ | |
1692 | if (template_arg_p) | |
1693 | /* But, within a template argument, we do not want make the | |
1694 | transformation, as there is no "this" pointer. */ | |
1695 | ; | |
1696 | else if (TREE_CODE (expr) == FIELD_DECL) | |
43854f72 SB |
1697 | { |
1698 | push_deferring_access_checks (dk_no_check); | |
2defb926 | 1699 | expr = finish_non_static_data_member (expr, NULL_TREE, |
43854f72 SB |
1700 | qualifying_class); |
1701 | pop_deferring_access_checks (); | |
1702 | } | |
ee76b931 MM |
1703 | else if (BASELINK_P (expr) && !processing_template_decl) |
1704 | { | |
38f1276b | 1705 | tree ob; |
ee76b931 MM |
1706 | |
1707 | /* See if any of the functions are non-static members. */ | |
7e361ae6 | 1708 | /* If so, the expression may be relative to 'this'. */ |
294e855f | 1709 | if (!shared_member_p (expr) |
38f1276b JM |
1710 | && (ob = maybe_dummy_object (qualifying_class, NULL), |
1711 | !is_dummy_object (ob))) | |
c8094d83 | 1712 | expr = (build_class_member_access_expr |
38f1276b | 1713 | (ob, |
ee76b931 MM |
1714 | expr, |
1715 | BASELINK_ACCESS_BINFO (expr), | |
5ade1ed2 DG |
1716 | /*preserve_reference=*/false, |
1717 | tf_warning_or_error)); | |
ee76b931 | 1718 | else if (done) |
a5ac359a MM |
1719 | /* The expression is a qualified name whose address is not |
1720 | being taken. */ | |
1721 | expr = build_offset_ref (qualifying_class, expr, /*address_p=*/false); | |
ee76b931 MM |
1722 | } |
1723 | ||
1724 | return expr; | |
1725 | } | |
1726 | ||
b69b1501 MM |
1727 | /* Begin a statement-expression. The value returned must be passed to |
1728 | finish_stmt_expr. */ | |
b4c4a9ec | 1729 | |
c8094d83 | 1730 | tree |
3a978d72 | 1731 | begin_stmt_expr (void) |
b4c4a9ec | 1732 | { |
325c3691 | 1733 | return push_stmt_list (); |
35b1567d BC |
1734 | } |
1735 | ||
a5bcc582 | 1736 | /* Process the final expression of a statement expression. EXPR can be |
85a56c9d MM |
1737 | NULL, if the final expression is empty. Return a STATEMENT_LIST |
1738 | containing all the statements in the statement-expression, or | |
1739 | ERROR_MARK_NODE if there was an error. */ | |
a5bcc582 NS |
1740 | |
1741 | tree | |
325c3691 | 1742 | finish_stmt_expr_expr (tree expr, tree stmt_expr) |
a5bcc582 | 1743 | { |
72e4661a | 1744 | if (error_operand_p (expr)) |
76b9a2a1 AP |
1745 | { |
1746 | /* The type of the statement-expression is the type of the last | |
1747 | expression. */ | |
1748 | TREE_TYPE (stmt_expr) = error_mark_node; | |
1749 | return error_mark_node; | |
1750 | } | |
c8094d83 | 1751 | |
85a56c9d | 1752 | /* If the last statement does not have "void" type, then the value |
3db45ab5 | 1753 | of the last statement is the value of the entire expression. */ |
a5bcc582 NS |
1754 | if (expr) |
1755 | { | |
c6c7698d JM |
1756 | tree type = TREE_TYPE (expr); |
1757 | ||
1758 | if (processing_template_decl) | |
1759 | { | |
c2255bc4 | 1760 | expr = build_stmt (input_location, EXPR_STMT, expr); |
c6c7698d JM |
1761 | expr = add_stmt (expr); |
1762 | /* Mark the last statement so that we can recognize it as such at | |
1763 | template-instantiation time. */ | |
1764 | EXPR_STMT_STMT_EXPR_RESULT (expr) = 1; | |
1765 | } | |
1766 | else if (VOID_TYPE_P (type)) | |
a5bcc582 | 1767 | { |
c6c7698d JM |
1768 | /* Just treat this like an ordinary statement. */ |
1769 | expr = finish_expr_stmt (expr); | |
1770 | } | |
1771 | else | |
1772 | { | |
1773 | /* It actually has a value we need to deal with. First, force it | |
1774 | to be an rvalue so that we won't need to build up a copy | |
1775 | constructor call later when we try to assign it to something. */ | |
1776 | expr = force_rvalue (expr); | |
85a56c9d MM |
1777 | if (error_operand_p (expr)) |
1778 | return error_mark_node; | |
c6c7698d JM |
1779 | |
1780 | /* Update for array-to-pointer decay. */ | |
2692eb7d | 1781 | type = TREE_TYPE (expr); |
c6c7698d JM |
1782 | |
1783 | /* Wrap it in a CLEANUP_POINT_EXPR and add it to the list like a | |
1784 | normal statement, but don't convert to void or actually add | |
1785 | the EXPR_STMT. */ | |
1786 | if (TREE_CODE (expr) != CLEANUP_POINT_EXPR) | |
1787 | expr = maybe_cleanup_point_expr (expr); | |
1788 | add_stmt (expr); | |
85a56c9d | 1789 | } |
c6c7698d | 1790 | |
85a56c9d MM |
1791 | /* The type of the statement-expression is the type of the last |
1792 | expression. */ | |
1793 | TREE_TYPE (stmt_expr) = type; | |
a5bcc582 | 1794 | } |
c8094d83 | 1795 | |
85a56c9d | 1796 | return stmt_expr; |
a5bcc582 NS |
1797 | } |
1798 | ||
303b7406 NS |
1799 | /* Finish a statement-expression. EXPR should be the value returned |
1800 | by the previous begin_stmt_expr. Returns an expression | |
1801 | representing the statement-expression. */ | |
b4c4a9ec | 1802 | |
c8094d83 | 1803 | tree |
325c3691 | 1804 | finish_stmt_expr (tree stmt_expr, bool has_no_scope) |
b4c4a9ec | 1805 | { |
85a56c9d MM |
1806 | tree type; |
1807 | tree result; | |
325c3691 | 1808 | |
85a56c9d | 1809 | if (error_operand_p (stmt_expr)) |
d7b5fa31 JJ |
1810 | { |
1811 | pop_stmt_list (stmt_expr); | |
1812 | return error_mark_node; | |
1813 | } | |
325c3691 | 1814 | |
85a56c9d | 1815 | gcc_assert (TREE_CODE (stmt_expr) == STATEMENT_LIST); |
325c3691 | 1816 | |
85a56c9d MM |
1817 | type = TREE_TYPE (stmt_expr); |
1818 | result = pop_stmt_list (stmt_expr); | |
c6c7698d | 1819 | TREE_TYPE (result) = type; |
6f80451c | 1820 | |
a5bcc582 | 1821 | if (processing_template_decl) |
325c3691 RH |
1822 | { |
1823 | result = build_min (STMT_EXPR, type, result); | |
1824 | TREE_SIDE_EFFECTS (result) = 1; | |
1825 | STMT_EXPR_NO_SCOPE (result) = has_no_scope; | |
1826 | } | |
c6c7698d | 1827 | else if (CLASS_TYPE_P (type)) |
a5bcc582 | 1828 | { |
c6c7698d JM |
1829 | /* Wrap the statement-expression in a TARGET_EXPR so that the |
1830 | temporary object created by the final expression is destroyed at | |
1831 | the end of the full-expression containing the | |
1832 | statement-expression. */ | |
1833 | result = force_target_expr (type, result); | |
a5bcc582 | 1834 | } |
325c3691 | 1835 | |
b4c4a9ec MM |
1836 | return result; |
1837 | } | |
1838 | ||
c2acde1e JM |
1839 | /* Returns the expression which provides the value of STMT_EXPR. */ |
1840 | ||
1841 | tree | |
1842 | stmt_expr_value_expr (tree stmt_expr) | |
1843 | { | |
1844 | tree t = STMT_EXPR_STMT (stmt_expr); | |
1845 | ||
1846 | if (TREE_CODE (t) == BIND_EXPR) | |
1847 | t = BIND_EXPR_BODY (t); | |
1848 | ||
9de0e916 | 1849 | if (TREE_CODE (t) == STATEMENT_LIST && STATEMENT_LIST_TAIL (t)) |
c2acde1e JM |
1850 | t = STATEMENT_LIST_TAIL (t)->stmt; |
1851 | ||
1852 | if (TREE_CODE (t) == EXPR_STMT) | |
1853 | t = EXPR_STMT_EXPR (t); | |
1854 | ||
1855 | return t; | |
1856 | } | |
1857 | ||
9af66ed1 DS |
1858 | /* Return TRUE iff EXPR_STMT is an empty list of |
1859 | expression statements. */ | |
1860 | ||
1861 | bool | |
1862 | empty_expr_stmt_p (tree expr_stmt) | |
1863 | { | |
1864 | tree body = NULL_TREE; | |
1865 | ||
489df541 DS |
1866 | if (expr_stmt == void_zero_node) |
1867 | return true; | |
1868 | ||
9af66ed1 DS |
1869 | if (expr_stmt) |
1870 | { | |
1871 | if (TREE_CODE (expr_stmt) == EXPR_STMT) | |
1872 | body = EXPR_STMT_EXPR (expr_stmt); | |
1873 | else if (TREE_CODE (expr_stmt) == STATEMENT_LIST) | |
1874 | body = expr_stmt; | |
1875 | } | |
1876 | ||
489df541 DS |
1877 | if (body) |
1878 | { | |
1879 | if (TREE_CODE (body) == STATEMENT_LIST) | |
1880 | return tsi_end_p (tsi_start (body)); | |
1881 | else | |
1882 | return empty_expr_stmt_p (body); | |
1883 | } | |
9af66ed1 DS |
1884 | return false; |
1885 | } | |
1886 | ||
b3445994 | 1887 | /* Perform Koenig lookup. FN is the postfix-expression representing |
fa531100 | 1888 | the function (or functions) to call; ARGS are the arguments to the |
f9132eb7 RRC |
1889 | call; if INCLUDE_STD then the `std' namespace is automatically |
1890 | considered an associated namespace (used in range-based for loops). | |
1891 | Returns the functions to be considered by overload resolution. */ | |
b3445994 MM |
1892 | |
1893 | tree | |
f9132eb7 | 1894 | perform_koenig_lookup (tree fn, VEC(tree,gc) *args, bool include_std) |
b3445994 MM |
1895 | { |
1896 | tree identifier = NULL_TREE; | |
1897 | tree functions = NULL_TREE; | |
d095e03c | 1898 | tree tmpl_args = NULL_TREE; |
4e6a9725 | 1899 | bool template_id = false; |
d095e03c JM |
1900 | |
1901 | if (TREE_CODE (fn) == TEMPLATE_ID_EXPR) | |
1902 | { | |
4e6a9725 JM |
1903 | /* Use a separate flag to handle null args. */ |
1904 | template_id = true; | |
d095e03c JM |
1905 | tmpl_args = TREE_OPERAND (fn, 1); |
1906 | fn = TREE_OPERAND (fn, 0); | |
1907 | } | |
b3445994 MM |
1908 | |
1909 | /* Find the name of the overloaded function. */ | |
1910 | if (TREE_CODE (fn) == IDENTIFIER_NODE) | |
1911 | identifier = fn; | |
1912 | else if (is_overloaded_fn (fn)) | |
1913 | { | |
1914 | functions = fn; | |
1915 | identifier = DECL_NAME (get_first_fn (functions)); | |
1916 | } | |
1917 | else if (DECL_P (fn)) | |
1918 | { | |
1919 | functions = fn; | |
1920 | identifier = DECL_NAME (fn); | |
1921 | } | |
1922 | ||
1923 | /* A call to a namespace-scope function using an unqualified name. | |
1924 | ||
1925 | Do Koenig lookup -- unless any of the arguments are | |
1926 | type-dependent. */ | |
d095e03c JM |
1927 | if (!any_type_dependent_arguments_p (args) |
1928 | && !any_dependent_template_arguments_p (tmpl_args)) | |
b3445994 | 1929 | { |
f9132eb7 | 1930 | fn = lookup_arg_dependent (identifier, functions, args, include_std); |
b3445994 MM |
1931 | if (!fn) |
1932 | /* The unqualified name could not be resolved. */ | |
1933 | fn = unqualified_fn_lookup_error (identifier); | |
1934 | } | |
b3445994 | 1935 | |
4e6a9725 JM |
1936 | if (fn && template_id) |
1937 | fn = build2 (TEMPLATE_ID_EXPR, unknown_type_node, fn, tmpl_args); | |
d095e03c | 1938 | |
b3445994 MM |
1939 | return fn; |
1940 | } | |
1941 | ||
c166b898 ILT |
1942 | /* Generate an expression for `FN (ARGS)'. This may change the |
1943 | contents of ARGS. | |
4ba126e4 MM |
1944 | |
1945 | If DISALLOW_VIRTUAL is true, the call to FN will be not generated | |
1946 | as a virtual call, even if FN is virtual. (This flag is set when | |
1947 | encountering an expression where the function name is explicitly | |
1948 | qualified. For example a call to `X::f' never generates a virtual | |
1949 | call.) | |
1950 | ||
1951 | Returns code for the call. */ | |
b4c4a9ec | 1952 | |
c8094d83 | 1953 | tree |
c166b898 ILT |
1954 | finish_call_expr (tree fn, VEC(tree,gc) **args, bool disallow_virtual, |
1955 | bool koenig_p, tsubst_flags_t complain) | |
b4c4a9ec | 1956 | { |
d17811fd MM |
1957 | tree result; |
1958 | tree orig_fn; | |
c166b898 | 1959 | VEC(tree,gc) *orig_args = NULL; |
d17811fd | 1960 | |
c166b898 | 1961 | if (fn == error_mark_node) |
4ba126e4 MM |
1962 | return error_mark_node; |
1963 | ||
4860b874 | 1964 | gcc_assert (!TYPE_P (fn)); |
a759e627 | 1965 | |
d17811fd | 1966 | orig_fn = fn; |
d17811fd MM |
1967 | |
1968 | if (processing_template_decl) | |
1969 | { | |
1970 | if (type_dependent_expression_p (fn) | |
c166b898 | 1971 | || any_type_dependent_arguments_p (*args)) |
6d80c4b9 | 1972 | { |
c166b898 | 1973 | result = build_nt_call_vec (fn, *args); |
5094a795 | 1974 | KOENIG_LOOKUP_P (result) = koenig_p; |
be461b8f JJ |
1975 | if (cfun) |
1976 | { | |
1977 | do | |
1978 | { | |
1979 | tree fndecl = OVL_CURRENT (fn); | |
1980 | if (TREE_CODE (fndecl) != FUNCTION_DECL | |
1981 | || !TREE_THIS_VOLATILE (fndecl)) | |
1982 | break; | |
1983 | fn = OVL_NEXT (fn); | |
1984 | } | |
1985 | while (fn); | |
1986 | if (!fn) | |
1987 | current_function_returns_abnormally = 1; | |
1988 | } | |
6d80c4b9 MM |
1989 | return result; |
1990 | } | |
c166b898 | 1991 | orig_args = make_tree_vector_copy (*args); |
d17811fd MM |
1992 | if (!BASELINK_P (fn) |
1993 | && TREE_CODE (fn) != PSEUDO_DTOR_EXPR | |
1994 | && TREE_TYPE (fn) != unknown_type_node) | |
1995 | fn = build_non_dependent_expr (fn); | |
c166b898 | 1996 | make_args_non_dependent (*args); |
d17811fd MM |
1997 | } |
1998 | ||
eff3a276 MM |
1999 | if (is_overloaded_fn (fn)) |
2000 | fn = baselink_for_fns (fn); | |
a723baf1 | 2001 | |
d17811fd | 2002 | result = NULL_TREE; |
4ba126e4 | 2003 | if (BASELINK_P (fn)) |
03d82991 | 2004 | { |
4ba126e4 MM |
2005 | tree object; |
2006 | ||
2007 | /* A call to a member function. From [over.call.func]: | |
2008 | ||
2009 | If the keyword this is in scope and refers to the class of | |
2010 | that member function, or a derived class thereof, then the | |
2011 | function call is transformed into a qualified function call | |
2012 | using (*this) as the postfix-expression to the left of the | |
2013 | . operator.... [Otherwise] a contrived object of type T | |
c8094d83 | 2014 | becomes the implied object argument. |
4ba126e4 | 2015 | |
38f1276b | 2016 | In this situation: |
4ba126e4 MM |
2017 | |
2018 | struct A { void f(); }; | |
2019 | struct B : public A {}; | |
2020 | struct C : public A { void g() { B::f(); }}; | |
2021 | ||
38f1276b JM |
2022 | "the class of that member function" refers to `A'. But 11.2 |
2023 | [class.access.base] says that we need to convert 'this' to B* as | |
2024 | part of the access, so we pass 'B' to maybe_dummy_object. */ | |
b4c4a9ec | 2025 | |
38f1276b JM |
2026 | object = maybe_dummy_object (BINFO_TYPE (BASELINK_ACCESS_BINFO (fn)), |
2027 | NULL); | |
b4c4a9ec | 2028 | |
d17811fd MM |
2029 | if (processing_template_decl) |
2030 | { | |
2031 | if (type_dependent_expression_p (object)) | |
c166b898 ILT |
2032 | { |
2033 | tree ret = build_nt_call_vec (orig_fn, orig_args); | |
2034 | release_tree_vector (orig_args); | |
2035 | return ret; | |
2036 | } | |
d17811fd MM |
2037 | object = build_non_dependent_expr (object); |
2038 | } | |
2039 | ||
2040 | result = build_new_method_call (object, fn, args, NULL_TREE, | |
c8094d83 | 2041 | (disallow_virtual |
63c9a190 | 2042 | ? LOOKUP_NONVIRTUAL : 0), |
5ade1ed2 DG |
2043 | /*fn_p=*/NULL, |
2044 | complain); | |
4ba126e4 MM |
2045 | } |
2046 | else if (is_overloaded_fn (fn)) | |
16c35a1f RH |
2047 | { |
2048 | /* If the function is an overloaded builtin, resolve it. */ | |
2049 | if (TREE_CODE (fn) == FUNCTION_DECL | |
58646b77 PB |
2050 | && (DECL_BUILT_IN_CLASS (fn) == BUILT_IN_NORMAL |
2051 | || DECL_BUILT_IN_CLASS (fn) == BUILT_IN_MD)) | |
c2255bc4 | 2052 | result = resolve_overloaded_builtin (input_location, fn, *args); |
16c35a1f RH |
2053 | |
2054 | if (!result) | |
2055 | /* A call to a namespace-scope function. */ | |
5094a795 | 2056 | result = build_new_function_call (fn, args, koenig_p, complain); |
16c35a1f | 2057 | } |
a723baf1 MM |
2058 | else if (TREE_CODE (fn) == PSEUDO_DTOR_EXPR) |
2059 | { | |
c166b898 | 2060 | if (!VEC_empty (tree, *args)) |
a723baf1 MM |
2061 | error ("arguments to destructor are not allowed"); |
2062 | /* Mark the pseudo-destructor call as having side-effects so | |
2063 | that we do not issue warnings about its use. */ | |
2064 | result = build1 (NOP_EXPR, | |
2065 | void_type_node, | |
2066 | TREE_OPERAND (fn, 0)); | |
2067 | TREE_SIDE_EFFECTS (result) = 1; | |
a723baf1 | 2068 | } |
4ba126e4 | 2069 | else if (CLASS_TYPE_P (TREE_TYPE (fn))) |
d17811fd MM |
2070 | /* If the "function" is really an object of class type, it might |
2071 | have an overloaded `operator ()'. */ | |
c166b898 | 2072 | result = build_op_call (fn, args, complain); |
16c35a1f | 2073 | |
d17811fd MM |
2074 | if (!result) |
2075 | /* A call where the function is unknown. */ | |
c166b898 | 2076 | result = cp_build_function_call_vec (fn, args, complain); |
4ba126e4 | 2077 | |
d17811fd | 2078 | if (processing_template_decl) |
6d80c4b9 | 2079 | { |
c166b898 | 2080 | result = build_call_vec (TREE_TYPE (result), orig_fn, orig_args); |
5094a795 | 2081 | KOENIG_LOOKUP_P (result) = koenig_p; |
c166b898 | 2082 | release_tree_vector (orig_args); |
6d80c4b9 | 2083 | } |
c166b898 | 2084 | |
d17811fd | 2085 | return result; |
b4c4a9ec MM |
2086 | } |
2087 | ||
2088 | /* Finish a call to a postfix increment or decrement or EXPR. (Which | |
2089 | is indicated by CODE, which should be POSTINCREMENT_EXPR or | |
2090 | POSTDECREMENT_EXPR.) */ | |
2091 | ||
c8094d83 | 2092 | tree |
3a978d72 | 2093 | finish_increment_expr (tree expr, enum tree_code code) |
b4c4a9ec | 2094 | { |
5ade1ed2 | 2095 | return build_x_unary_op (code, expr, tf_warning_or_error); |
b4c4a9ec MM |
2096 | } |
2097 | ||
2098 | /* Finish a use of `this'. Returns an expression for `this'. */ | |
2099 | ||
c8094d83 | 2100 | tree |
3a978d72 | 2101 | finish_this_expr (void) |
b4c4a9ec MM |
2102 | { |
2103 | tree result; | |
2104 | ||
c6be04ad JM |
2105 | if (current_class_ptr) |
2106 | { | |
2107 | tree type = TREE_TYPE (current_class_ref); | |
2108 | ||
2109 | /* In a lambda expression, 'this' refers to the captured 'this'. */ | |
2110 | if (LAMBDA_TYPE_P (type)) | |
2111 | result = lambda_expr_this_capture (CLASSTYPE_LAMBDA_EXPR (type)); | |
2112 | else | |
2113 | result = current_class_ptr; | |
2114 | ||
2115 | } | |
b4c4a9ec MM |
2116 | else if (current_function_decl |
2117 | && DECL_STATIC_FUNCTION_P (current_function_decl)) | |
2118 | { | |
9e637a26 | 2119 | error ("%<this%> is unavailable for static member functions"); |
b4c4a9ec MM |
2120 | result = error_mark_node; |
2121 | } | |
2122 | else | |
2123 | { | |
2124 | if (current_function_decl) | |
9e637a26 | 2125 | error ("invalid use of %<this%> in non-member function"); |
b4c4a9ec | 2126 | else |
9e637a26 | 2127 | error ("invalid use of %<this%> at top level"); |
b4c4a9ec MM |
2128 | result = error_mark_node; |
2129 | } | |
2130 | ||
2131 | return result; | |
2132 | } | |
2133 | ||
a723baf1 MM |
2134 | /* Finish a pseudo-destructor expression. If SCOPE is NULL, the |
2135 | expression was of the form `OBJECT.~DESTRUCTOR' where DESTRUCTOR is | |
2136 | the TYPE for the type given. If SCOPE is non-NULL, the expression | |
2137 | was of the form `OBJECT.SCOPE::~DESTRUCTOR'. */ | |
b4c4a9ec | 2138 | |
c8094d83 | 2139 | tree |
3a978d72 | 2140 | finish_pseudo_destructor_expr (tree object, tree scope, tree destructor) |
b4c4a9ec | 2141 | { |
09b1ccd6 | 2142 | if (object == error_mark_node || destructor == error_mark_node) |
a723baf1 | 2143 | return error_mark_node; |
40242ccf | 2144 | |
50bc768d | 2145 | gcc_assert (TYPE_P (destructor)); |
b4c4a9ec | 2146 | |
a723baf1 MM |
2147 | if (!processing_template_decl) |
2148 | { | |
2149 | if (scope == error_mark_node) | |
2150 | { | |
2151 | error ("invalid qualifying scope in pseudo-destructor name"); | |
2152 | return error_mark_node; | |
2153 | } | |
5cf10afb AP |
2154 | if (scope && TYPE_P (scope) && !check_dtor_name (scope, destructor)) |
2155 | { | |
2156 | error ("qualified type %qT does not match destructor name ~%qT", | |
2157 | scope, destructor); | |
2158 | return error_mark_node; | |
2159 | } | |
2160 | ||
c8094d83 | 2161 | |
26bcf8fc MM |
2162 | /* [expr.pseudo] says both: |
2163 | ||
0cbd7506 | 2164 | The type designated by the pseudo-destructor-name shall be |
26bcf8fc MM |
2165 | the same as the object type. |
2166 | ||
0cbd7506 | 2167 | and: |
26bcf8fc | 2168 | |
0cbd7506 | 2169 | The cv-unqualified versions of the object type and of the |
26bcf8fc MM |
2170 | type designated by the pseudo-destructor-name shall be the |
2171 | same type. | |
2172 | ||
0cbd7506 MS |
2173 | We implement the more generous second sentence, since that is |
2174 | what most other compilers do. */ | |
c8094d83 | 2175 | if (!same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (object), |
26bcf8fc | 2176 | destructor)) |
a723baf1 | 2177 | { |
a82e1a7d | 2178 | error ("%qE is not of type %qT", object, destructor); |
a723baf1 MM |
2179 | return error_mark_node; |
2180 | } | |
2181 | } | |
b4c4a9ec | 2182 | |
f293ce4b | 2183 | return build3 (PSEUDO_DTOR_EXPR, void_type_node, object, scope, destructor); |
b4c4a9ec MM |
2184 | } |
2185 | ||
ce4a0391 MM |
2186 | /* Finish an expression of the form CODE EXPR. */ |
2187 | ||
2188 | tree | |
3a978d72 | 2189 | finish_unary_op_expr (enum tree_code code, tree expr) |
ce4a0391 | 2190 | { |
5ade1ed2 | 2191 | tree result = build_x_unary_op (code, expr, tf_warning_or_error); |
7c355bca ML |
2192 | /* Inside a template, build_x_unary_op does not fold the |
2193 | expression. So check whether the result is folded before | |
2194 | setting TREE_NEGATED_INT. */ | |
2195 | if (code == NEGATE_EXPR && TREE_CODE (expr) == INTEGER_CST | |
88b4335f | 2196 | && TREE_CODE (result) == INTEGER_CST |
8df83eae | 2197 | && !TYPE_UNSIGNED (TREE_TYPE (result)) |
88b4335f | 2198 | && INT_CST_LT (result, integer_zero_node)) |
6fc98adf MM |
2199 | { |
2200 | /* RESULT may be a cached INTEGER_CST, so we must copy it before | |
2201 | setting TREE_NEGATED_INT. */ | |
2202 | result = copy_node (result); | |
2203 | TREE_NEGATED_INT (result) = 1; | |
2204 | } | |
59c0753d | 2205 | if (TREE_OVERFLOW_P (result) && !TREE_OVERFLOW_P (expr)) |
c2255bc4 | 2206 | overflow_warning (input_location, result); |
59c0753d | 2207 | |
ce4a0391 MM |
2208 | return result; |
2209 | } | |
2210 | ||
a723baf1 | 2211 | /* Finish a compound-literal expression. TYPE is the type to which |
09357846 | 2212 | the CONSTRUCTOR in COMPOUND_LITERAL is being cast. */ |
a723baf1 MM |
2213 | |
2214 | tree | |
09357846 | 2215 | finish_compound_literal (tree type, tree compound_literal) |
a723baf1 | 2216 | { |
326a4d4e JJ |
2217 | if (type == error_mark_node) |
2218 | return error_mark_node; | |
2219 | ||
2b643eda MM |
2220 | if (!TYPE_OBJ_P (type)) |
2221 | { | |
2222 | error ("compound literal of non-object type %qT", type); | |
2223 | return error_mark_node; | |
2224 | } | |
2225 | ||
a723baf1 | 2226 | if (processing_template_decl) |
a723baf1 | 2227 | { |
e92fb501 MM |
2228 | TREE_TYPE (compound_literal) = type; |
2229 | /* Mark the expression as a compound literal. */ | |
2230 | TREE_HAS_CONSTRUCTOR (compound_literal) = 1; | |
2231 | return compound_literal; | |
a723baf1 MM |
2232 | } |
2233 | ||
df794884 | 2234 | type = complete_type (type); |
09357846 JM |
2235 | |
2236 | if (TYPE_NON_AGGREGATE_CLASS (type)) | |
2237 | { | |
2238 | /* Trying to deal with a CONSTRUCTOR instead of a TREE_LIST | |
2239 | everywhere that deals with function arguments would be a pain, so | |
2240 | just wrap it in a TREE_LIST. The parser set a flag so we know | |
2241 | that it came from T{} rather than T({}). */ | |
2242 | CONSTRUCTOR_IS_DIRECT_INIT (compound_literal) = 1; | |
2243 | compound_literal = build_tree_list (NULL_TREE, compound_literal); | |
2244 | return build_functional_cast (type, compound_literal, tf_error); | |
2245 | } | |
2246 | ||
23bee8f4 JJ |
2247 | if (TREE_CODE (type) == ARRAY_TYPE |
2248 | && check_array_initializer (NULL_TREE, type, compound_literal)) | |
2249 | return error_mark_node; | |
df794884 JM |
2250 | compound_literal = reshape_init (type, compound_literal); |
2251 | if (TREE_CODE (type) == ARRAY_TYPE) | |
2252 | cp_complete_array_type (&type, compound_literal, false); | |
2253 | compound_literal = digest_init (type, compound_literal); | |
467649eb | 2254 | return get_target_expr (compound_literal); |
a723baf1 MM |
2255 | } |
2256 | ||
5f261ba9 MM |
2257 | /* Return the declaration for the function-name variable indicated by |
2258 | ID. */ | |
2259 | ||
2260 | tree | |
2261 | finish_fname (tree id) | |
2262 | { | |
2263 | tree decl; | |
c8094d83 | 2264 | |
3ba09659 | 2265 | decl = fname_decl (input_location, C_RID_CODE (id), id); |
5f261ba9 | 2266 | if (processing_template_decl) |
10b1d5e7 | 2267 | decl = DECL_NAME (decl); |
5f261ba9 MM |
2268 | return decl; |
2269 | } | |
2270 | ||
8014a339 | 2271 | /* Finish a translation unit. */ |
ce4a0391 | 2272 | |
c8094d83 | 2273 | void |
3a978d72 | 2274 | finish_translation_unit (void) |
ce4a0391 MM |
2275 | { |
2276 | /* In case there were missing closebraces, | |
2277 | get us back to the global binding level. */ | |
273a708f | 2278 | pop_everything (); |
ce4a0391 MM |
2279 | while (current_namespace != global_namespace) |
2280 | pop_namespace (); | |
0ba8a114 | 2281 | |
c6002625 | 2282 | /* Do file scope __FUNCTION__ et al. */ |
0ba8a114 | 2283 | finish_fname_decls (); |
ce4a0391 MM |
2284 | } |
2285 | ||
b4c4a9ec MM |
2286 | /* Finish a template type parameter, specified as AGGR IDENTIFIER. |
2287 | Returns the parameter. */ | |
2288 | ||
c8094d83 | 2289 | tree |
3a978d72 | 2290 | finish_template_type_parm (tree aggr, tree identifier) |
b4c4a9ec | 2291 | { |
6eabb241 | 2292 | if (aggr != class_type_node) |
b4c4a9ec | 2293 | { |
cbe5f3b3 | 2294 | permerror (input_location, "template type parameters must use the keyword %<class%> or %<typename%>"); |
b4c4a9ec MM |
2295 | aggr = class_type_node; |
2296 | } | |
2297 | ||
2298 | return build_tree_list (aggr, identifier); | |
2299 | } | |
2300 | ||
2301 | /* Finish a template template parameter, specified as AGGR IDENTIFIER. | |
2302 | Returns the parameter. */ | |
2303 | ||
c8094d83 | 2304 | tree |
3a978d72 | 2305 | finish_template_template_parm (tree aggr, tree identifier) |
b4c4a9ec | 2306 | { |
c2255bc4 AH |
2307 | tree decl = build_decl (input_location, |
2308 | TYPE_DECL, identifier, NULL_TREE); | |
b4c4a9ec MM |
2309 | tree tmpl = build_lang_decl (TEMPLATE_DECL, identifier, NULL_TREE); |
2310 | DECL_TEMPLATE_PARMS (tmpl) = current_template_parms; | |
2311 | DECL_TEMPLATE_RESULT (tmpl) = decl; | |
c727aa5e | 2312 | DECL_ARTIFICIAL (decl) = 1; |
b4c4a9ec MM |
2313 | end_template_decl (); |
2314 | ||
50bc768d | 2315 | gcc_assert (DECL_TEMPLATE_PARMS (tmpl)); |
b37bf5bd | 2316 | |
85d85234 DG |
2317 | check_default_tmpl_args (decl, DECL_TEMPLATE_PARMS (tmpl), |
2318 | /*is_primary=*/true, /*is_partial=*/false, | |
2319 | /*is_friend=*/0); | |
2320 | ||
b4c4a9ec MM |
2321 | return finish_template_type_parm (aggr, tmpl); |
2322 | } | |
ce4a0391 | 2323 | |
8ba658ee MM |
2324 | /* ARGUMENT is the default-argument value for a template template |
2325 | parameter. If ARGUMENT is invalid, issue error messages and return | |
2326 | the ERROR_MARK_NODE. Otherwise, ARGUMENT itself is returned. */ | |
2327 | ||
2328 | tree | |
2329 | check_template_template_default_arg (tree argument) | |
2330 | { | |
2331 | if (TREE_CODE (argument) != TEMPLATE_DECL | |
2332 | && TREE_CODE (argument) != TEMPLATE_TEMPLATE_PARM | |
8ba658ee MM |
2333 | && TREE_CODE (argument) != UNBOUND_CLASS_TEMPLATE) |
2334 | { | |
a3a503a5 | 2335 | if (TREE_CODE (argument) == TYPE_DECL) |
e488a090 VR |
2336 | error ("invalid use of type %qT as a default value for a template " |
2337 | "template-parameter", TREE_TYPE (argument)); | |
a3a503a5 GB |
2338 | else |
2339 | error ("invalid default argument for a template template parameter"); | |
8ba658ee MM |
2340 | return error_mark_node; |
2341 | } | |
2342 | ||
2343 | return argument; | |
2344 | } | |
2345 | ||
ce4a0391 MM |
2346 | /* Begin a class definition, as indicated by T. */ |
2347 | ||
2348 | tree | |
b9e75696 | 2349 | begin_class_definition (tree t, tree attributes) |
ce4a0391 | 2350 | { |
7d2f0ecd | 2351 | if (error_operand_p (t) || error_operand_p (TYPE_MAIN_DECL (t))) |
7437519c ZW |
2352 | return error_mark_node; |
2353 | ||
522d6614 NS |
2354 | if (processing_template_parmlist) |
2355 | { | |
a82e1a7d | 2356 | error ("definition of %q#T inside template parameter list", t); |
522d6614 NS |
2357 | return error_mark_node; |
2358 | } | |
ebf0bf7f JJ |
2359 | |
2360 | /* According to the C++ ABI, decimal classes defined in ISO/IEC TR 24733 | |
2361 | are passed the same as decimal scalar types. */ | |
cd924144 JM |
2362 | if (TREE_CODE (t) == RECORD_TYPE |
2363 | && !processing_template_decl) | |
ebf0bf7f | 2364 | { |
cd924144 JM |
2365 | tree ns = TYPE_CONTEXT (t); |
2366 | if (ns && TREE_CODE (ns) == NAMESPACE_DECL | |
2367 | && DECL_CONTEXT (ns) == std_node | |
935c0a5d | 2368 | && DECL_NAME (ns) |
cd924144 JM |
2369 | && !strcmp (IDENTIFIER_POINTER (DECL_NAME (ns)), "decimal")) |
2370 | { | |
2371 | const char *n = TYPE_NAME_STRING (t); | |
2372 | if ((strcmp (n, "decimal32") == 0) | |
2373 | || (strcmp (n, "decimal64") == 0) | |
2374 | || (strcmp (n, "decimal128") == 0)) | |
2375 | TYPE_TRANSPARENT_AGGR (t) = 1; | |
2376 | } | |
ebf0bf7f JJ |
2377 | } |
2378 | ||
47ee8904 MM |
2379 | /* A non-implicit typename comes from code like: |
2380 | ||
2381 | template <typename T> struct A { | |
0cbd7506 | 2382 | template <typename U> struct A<T>::B ... |
47ee8904 MM |
2383 | |
2384 | This is erroneous. */ | |
2385 | else if (TREE_CODE (t) == TYPENAME_TYPE) | |
2386 | { | |
a82e1a7d | 2387 | error ("invalid definition of qualified type %qT", t); |
47ee8904 MM |
2388 | t = error_mark_node; |
2389 | } | |
2390 | ||
9e1e64ec | 2391 | if (t == error_mark_node || ! MAYBE_CLASS_TYPE_P (t)) |
ce4a0391 | 2392 | { |
9e1e64ec | 2393 | t = make_class_type (RECORD_TYPE); |
bd3d082e | 2394 | pushtag (make_anon_name (), t, /*tag_scope=*/ts_current); |
ce4a0391 | 2395 | } |
830fcda8 | 2396 | |
4c571114 | 2397 | if (TYPE_BEING_DEFINED (t)) |
ce4a0391 | 2398 | { |
9e1e64ec | 2399 | t = make_class_type (TREE_CODE (t)); |
bd3d082e | 2400 | pushtag (TYPE_IDENTIFIER (t), t, /*tag_scope=*/ts_current); |
ce4a0391 | 2401 | } |
ff350acd | 2402 | maybe_process_partial_specialization (t); |
29370796 | 2403 | pushclass (t); |
ce4a0391 | 2404 | TYPE_BEING_DEFINED (t) = 1; |
b9e75696 JM |
2405 | |
2406 | cplus_decl_attributes (&t, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE); | |
8943989d | 2407 | fixup_attribute_variants (t); |
b9e75696 | 2408 | |
c0694c4b MM |
2409 | if (flag_pack_struct) |
2410 | { | |
2411 | tree v; | |
2412 | TYPE_PACKED (t) = 1; | |
2413 | /* Even though the type is being defined for the first time | |
2414 | here, there might have been a forward declaration, so there | |
2415 | might be cv-qualified variants of T. */ | |
2416 | for (v = TYPE_NEXT_VARIANT (t); v; v = TYPE_NEXT_VARIANT (v)) | |
2417 | TYPE_PACKED (v) = 1; | |
2418 | } | |
ce4a0391 MM |
2419 | /* Reset the interface data, at the earliest possible |
2420 | moment, as it might have been set via a class foo; | |
2421 | before. */ | |
1951a1b6 JM |
2422 | if (! TYPE_ANONYMOUS_P (t)) |
2423 | { | |
c533e34d | 2424 | struct c_fileinfo *finfo = get_fileinfo (input_filename); |
5d709b00 | 2425 | CLASSTYPE_INTERFACE_ONLY (t) = finfo->interface_only; |
1951a1b6 | 2426 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X |
5d709b00 | 2427 | (t, finfo->interface_unknown); |
1951a1b6 | 2428 | } |
ce4a0391 | 2429 | reset_specialization(); |
c8094d83 | 2430 | |
b7975aed MM |
2431 | /* Make a declaration for this class in its own scope. */ |
2432 | build_self_reference (); | |
2433 | ||
830fcda8 | 2434 | return t; |
ce4a0391 MM |
2435 | } |
2436 | ||
61a127b3 MM |
2437 | /* Finish the member declaration given by DECL. */ |
2438 | ||
2439 | void | |
3a978d72 | 2440 | finish_member_declaration (tree decl) |
61a127b3 MM |
2441 | { |
2442 | if (decl == error_mark_node || decl == NULL_TREE) | |
2443 | return; | |
2444 | ||
2445 | if (decl == void_type_node) | |
2446 | /* The COMPONENT was a friend, not a member, and so there's | |
2447 | nothing for us to do. */ | |
2448 | return; | |
2449 | ||
2450 | /* We should see only one DECL at a time. */ | |
910ad8de | 2451 | gcc_assert (DECL_CHAIN (decl) == NULL_TREE); |
61a127b3 MM |
2452 | |
2453 | /* Set up access control for DECL. */ | |
c8094d83 | 2454 | TREE_PRIVATE (decl) |
61a127b3 | 2455 | = (current_access_specifier == access_private_node); |
c8094d83 | 2456 | TREE_PROTECTED (decl) |
61a127b3 MM |
2457 | = (current_access_specifier == access_protected_node); |
2458 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
2459 | { | |
17aec3eb RK |
2460 | TREE_PRIVATE (DECL_TEMPLATE_RESULT (decl)) = TREE_PRIVATE (decl); |
2461 | TREE_PROTECTED (DECL_TEMPLATE_RESULT (decl)) = TREE_PROTECTED (decl); | |
61a127b3 MM |
2462 | } |
2463 | ||
2464 | /* Mark the DECL as a member of the current class. */ | |
4f1c5b7d | 2465 | DECL_CONTEXT (decl) = current_class_type; |
61a127b3 | 2466 | |
b1d7b1c0 | 2467 | /* Check for bare parameter packs in the member variable declaration. */ |
1ad8aeeb | 2468 | if (TREE_CODE (decl) == FIELD_DECL) |
4439d02f | 2469 | { |
7b3e2d46 | 2470 | if (check_for_bare_parameter_packs (TREE_TYPE (decl))) |
4439d02f | 2471 | TREE_TYPE (decl) = error_mark_node; |
7b3e2d46 | 2472 | if (check_for_bare_parameter_packs (DECL_ATTRIBUTES (decl))) |
4439d02f DG |
2473 | DECL_ATTRIBUTES (decl) = NULL_TREE; |
2474 | } | |
b1d7b1c0 | 2475 | |
421844e7 MM |
2476 | /* [dcl.link] |
2477 | ||
2478 | A C language linkage is ignored for the names of class members | |
2479 | and the member function type of class member functions. */ | |
2480 | if (DECL_LANG_SPECIFIC (decl) && DECL_LANGUAGE (decl) == lang_c) | |
5d2ed28c | 2481 | SET_DECL_LANGUAGE (decl, lang_cplusplus); |
421844e7 | 2482 | |
61a127b3 MM |
2483 | /* Put functions on the TYPE_METHODS list and everything else on the |
2484 | TYPE_FIELDS list. Note that these are built up in reverse order. | |
2485 | We reverse them (to obtain declaration order) in finish_struct. */ | |
c8094d83 | 2486 | if (TREE_CODE (decl) == FUNCTION_DECL |
61a127b3 MM |
2487 | || DECL_FUNCTION_TEMPLATE_P (decl)) |
2488 | { | |
2489 | /* We also need to add this function to the | |
2490 | CLASSTYPE_METHOD_VEC. */ | |
b77fe7b4 NS |
2491 | if (add_method (current_class_type, decl, NULL_TREE)) |
2492 | { | |
910ad8de | 2493 | DECL_CHAIN (decl) = TYPE_METHODS (current_class_type); |
b77fe7b4 | 2494 | TYPE_METHODS (current_class_type) = decl; |
f139561c | 2495 | |
b77fe7b4 NS |
2496 | maybe_add_class_template_decl_list (current_class_type, decl, |
2497 | /*friend_p=*/0); | |
2498 | } | |
61a127b3 | 2499 | } |
f139561c | 2500 | /* Enter the DECL into the scope of the class. */ |
98ed9dae | 2501 | else if ((TREE_CODE (decl) == USING_DECL && !DECL_DEPENDENT_P (decl)) |
399dedb9 | 2502 | || pushdecl_class_level (decl)) |
61a127b3 MM |
2503 | { |
2504 | /* All TYPE_DECLs go at the end of TYPE_FIELDS. Ordinary fields | |
2505 | go at the beginning. The reason is that lookup_field_1 | |
2506 | searches the list in order, and we want a field name to | |
2507 | override a type name so that the "struct stat hack" will | |
2508 | work. In particular: | |
2509 | ||
2510 | struct S { enum E { }; int E } s; | |
2511 | s.E = 3; | |
2512 | ||
0e339752 | 2513 | is valid. In addition, the FIELD_DECLs must be maintained in |
61a127b3 MM |
2514 | declaration order so that class layout works as expected. |
2515 | However, we don't need that order until class layout, so we | |
2516 | save a little time by putting FIELD_DECLs on in reverse order | |
2517 | here, and then reversing them in finish_struct_1. (We could | |
2518 | also keep a pointer to the correct insertion points in the | |
2519 | list.) */ | |
2520 | ||
2521 | if (TREE_CODE (decl) == TYPE_DECL) | |
c8094d83 | 2522 | TYPE_FIELDS (current_class_type) |
61a127b3 MM |
2523 | = chainon (TYPE_FIELDS (current_class_type), decl); |
2524 | else | |
2525 | { | |
910ad8de | 2526 | DECL_CHAIN (decl) = TYPE_FIELDS (current_class_type); |
61a127b3 MM |
2527 | TYPE_FIELDS (current_class_type) = decl; |
2528 | } | |
8f032717 | 2529 | |
c8094d83 | 2530 | maybe_add_class_template_decl_list (current_class_type, decl, |
f139561c | 2531 | /*friend_p=*/0); |
61a127b3 | 2532 | } |
5e2f4cd2 MM |
2533 | |
2534 | if (pch_file) | |
2535 | note_decl_for_pch (decl); | |
2536 | } | |
2537 | ||
2538 | /* DECL has been declared while we are building a PCH file. Perform | |
2539 | actions that we might normally undertake lazily, but which can be | |
2540 | performed now so that they do not have to be performed in | |
2541 | translation units which include the PCH file. */ | |
2542 | ||
2543 | void | |
2544 | note_decl_for_pch (tree decl) | |
2545 | { | |
2546 | gcc_assert (pch_file); | |
2547 | ||
5e2f4cd2 MM |
2548 | /* There's a good chance that we'll have to mangle names at some |
2549 | point, even if only for emission in debugging information. */ | |
ec0897de JM |
2550 | if ((TREE_CODE (decl) == VAR_DECL |
2551 | || TREE_CODE (decl) == FUNCTION_DECL) | |
2552 | && !processing_template_decl) | |
5e2f4cd2 | 2553 | mangle_decl (decl); |
61a127b3 MM |
2554 | } |
2555 | ||
306ef644 | 2556 | /* Finish processing a complete template declaration. The PARMS are |
36a117a5 MM |
2557 | the template parameters. */ |
2558 | ||
2559 | void | |
3a978d72 | 2560 | finish_template_decl (tree parms) |
36a117a5 MM |
2561 | { |
2562 | if (parms) | |
2563 | end_template_decl (); | |
2564 | else | |
2565 | end_specialization (); | |
2566 | } | |
2567 | ||
509fc277 | 2568 | /* Finish processing a template-id (which names a type) of the form |
36a117a5 | 2569 | NAME < ARGS >. Return the TYPE_DECL for the type named by the |
838dfd8a | 2570 | template-id. If ENTERING_SCOPE is nonzero we are about to enter |
36a117a5 MM |
2571 | the scope of template-id indicated. */ |
2572 | ||
2573 | tree | |
3a978d72 | 2574 | finish_template_type (tree name, tree args, int entering_scope) |
36a117a5 MM |
2575 | { |
2576 | tree decl; | |
2577 | ||
2578 | decl = lookup_template_class (name, args, | |
42eaed49 | 2579 | NULL_TREE, NULL_TREE, entering_scope, |
23fca1f5 | 2580 | tf_warning_or_error | tf_user); |
36a117a5 MM |
2581 | if (decl != error_mark_node) |
2582 | decl = TYPE_STUB_DECL (decl); | |
2583 | ||
2584 | return decl; | |
2585 | } | |
648f19f6 | 2586 | |
ea6021e8 MM |
2587 | /* Finish processing a BASE_CLASS with the indicated ACCESS_SPECIFIER. |
2588 | Return a TREE_LIST containing the ACCESS_SPECIFIER and the | |
2589 | BASE_CLASS, or NULL_TREE if an error occurred. The | |
aba649ba | 2590 | ACCESS_SPECIFIER is one of |
809e3e7f NS |
2591 | access_{default,public,protected_private}_node. For a virtual base |
2592 | we set TREE_TYPE. */ | |
ea6021e8 | 2593 | |
c8094d83 | 2594 | tree |
dbbf88d1 | 2595 | finish_base_specifier (tree base, tree access, bool virtual_p) |
ea6021e8 | 2596 | { |
ea6021e8 MM |
2597 | tree result; |
2598 | ||
dbbf88d1 | 2599 | if (base == error_mark_node) |
acb044ee GDR |
2600 | { |
2601 | error ("invalid base-class specification"); | |
2602 | result = NULL_TREE; | |
2603 | } | |
9e1e64ec PC |
2604 | else if (! MAYBE_CLASS_TYPE_P (base)) |
2605 | { | |
2606 | error ("%qT is not a class type", base); | |
2607 | result = NULL_TREE; | |
2608 | } | |
ea6021e8 | 2609 | else |
bb92901d | 2610 | { |
dbbf88d1 | 2611 | if (cp_type_quals (base) != 0) |
0cbd7506 MS |
2612 | { |
2613 | error ("base class %qT has cv qualifiers", base); | |
2614 | base = TYPE_MAIN_VARIANT (base); | |
2615 | } | |
dbbf88d1 | 2616 | result = build_tree_list (access, base); |
809e3e7f NS |
2617 | if (virtual_p) |
2618 | TREE_TYPE (result) = integer_type_node; | |
bb92901d | 2619 | } |
ea6021e8 MM |
2620 | |
2621 | return result; | |
2622 | } | |
61a127b3 | 2623 | |
8f78f01f | 2624 | /* Issue a diagnostic that NAME cannot be found in SCOPE. DECL is |
2b7a3abf DS |
2625 | what we found when we tried to do the lookup. |
2626 | LOCATION is the location of the NAME identifier; | |
2627 | The location is used in the error message*/ | |
22038b2c NS |
2628 | |
2629 | void | |
2b7a3abf DS |
2630 | qualified_name_lookup_error (tree scope, tree name, |
2631 | tree decl, location_t location) | |
22038b2c | 2632 | { |
1e1b4b37 VR |
2633 | if (scope == error_mark_node) |
2634 | ; /* We already complained. */ | |
2635 | else if (TYPE_P (scope)) | |
22038b2c NS |
2636 | { |
2637 | if (!COMPLETE_TYPE_P (scope)) | |
69bc6bff MLI |
2638 | error_at (location, "incomplete type %qT used in nested name specifier", |
2639 | scope); | |
8f78f01f MM |
2640 | else if (TREE_CODE (decl) == TREE_LIST) |
2641 | { | |
69bc6bff MLI |
2642 | error_at (location, "reference to %<%T::%D%> is ambiguous", |
2643 | scope, name); | |
8f78f01f MM |
2644 | print_candidates (decl); |
2645 | } | |
22038b2c | 2646 | else |
69bc6bff | 2647 | error_at (location, "%qD is not a member of %qT", name, scope); |
22038b2c NS |
2648 | } |
2649 | else if (scope != global_namespace) | |
69bc6bff | 2650 | error_at (location, "%qD is not a member of %qD", name, scope); |
22038b2c | 2651 | else |
69bc6bff | 2652 | error_at (location, "%<::%D%> has not been declared", name); |
22038b2c | 2653 | } |
c8094d83 | 2654 | |
eff3a276 MM |
2655 | /* If FNS is a member function, a set of member functions, or a |
2656 | template-id referring to one or more member functions, return a | |
2657 | BASELINK for FNS, incorporating the current access context. | |
2658 | Otherwise, return FNS unchanged. */ | |
2659 | ||
2660 | tree | |
2661 | baselink_for_fns (tree fns) | |
2662 | { | |
2663 | tree fn; | |
2664 | tree cl; | |
2665 | ||
2666 | if (BASELINK_P (fns) | |
eff3a276 MM |
2667 | || error_operand_p (fns)) |
2668 | return fns; | |
2669 | ||
2670 | fn = fns; | |
2671 | if (TREE_CODE (fn) == TEMPLATE_ID_EXPR) | |
2672 | fn = TREE_OPERAND (fn, 0); | |
2673 | fn = get_first_fn (fn); | |
2674 | if (!DECL_FUNCTION_MEMBER_P (fn)) | |
2675 | return fns; | |
2676 | ||
2677 | cl = currently_open_derived_class (DECL_CONTEXT (fn)); | |
2678 | if (!cl) | |
2679 | cl = DECL_CONTEXT (fn); | |
2680 | cl = TYPE_BINFO (cl); | |
5a40306b | 2681 | return build_baselink (cl, cl, fns, /*optype=*/NULL_TREE); |
eff3a276 MM |
2682 | } |
2683 | ||
d5f4eddd JM |
2684 | /* Returns true iff DECL is an automatic variable from a function outside |
2685 | the current one. */ | |
2686 | ||
2687 | static bool | |
2688 | outer_automatic_var_p (tree decl) | |
2689 | { | |
2690 | return ((TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL) | |
2691 | && DECL_FUNCTION_SCOPE_P (decl) | |
2692 | && !TREE_STATIC (decl) | |
2693 | && DECL_CONTEXT (decl) != current_function_decl); | |
2694 | } | |
2695 | ||
9660afe0 JM |
2696 | /* Returns true iff DECL is a capture field from a lambda that is not our |
2697 | immediate context. */ | |
2698 | ||
2699 | static bool | |
2700 | outer_lambda_capture_p (tree decl) | |
2701 | { | |
2702 | return (TREE_CODE (decl) == FIELD_DECL | |
2703 | && LAMBDA_TYPE_P (DECL_CONTEXT (decl)) | |
19030d77 JM |
2704 | && (!current_class_type |
2705 | || !DERIVED_FROM_P (DECL_CONTEXT (decl), current_class_type))); | |
9660afe0 JM |
2706 | } |
2707 | ||
b3445994 MM |
2708 | /* ID_EXPRESSION is a representation of parsed, but unprocessed, |
2709 | id-expression. (See cp_parser_id_expression for details.) SCOPE, | |
2710 | if non-NULL, is the type or namespace used to explicitly qualify | |
2711 | ID_EXPRESSION. DECL is the entity to which that name has been | |
c8094d83 | 2712 | resolved. |
b3445994 MM |
2713 | |
2714 | *CONSTANT_EXPRESSION_P is true if we are presently parsing a | |
2715 | constant-expression. In that case, *NON_CONSTANT_EXPRESSION_P will | |
2716 | be set to true if this expression isn't permitted in a | |
2717 | constant-expression, but it is otherwise not set by this function. | |
2718 | *ALLOW_NON_CONSTANT_EXPRESSION_P is true if we are parsing a | |
2719 | constant-expression, but a non-constant expression is also | |
2720 | permissible. | |
2721 | ||
02ed62dd MM |
2722 | DONE is true if this expression is a complete postfix-expression; |
2723 | it is false if this expression is followed by '->', '[', '(', etc. | |
2724 | ADDRESS_P is true iff this expression is the operand of '&'. | |
2725 | TEMPLATE_P is true iff the qualified-id was of the form | |
2726 | "A::template B". TEMPLATE_ARG_P is true iff this qualified name | |
2727 | appears as a template argument. | |
2728 | ||
b3445994 MM |
2729 | If an error occurs, and it is the kind of error that might cause |
2730 | the parser to abort a tentative parse, *ERROR_MSG is filled in. It | |
2731 | is the caller's responsibility to issue the message. *ERROR_MSG | |
2732 | will be a string with static storage duration, so the caller need | |
2733 | not "free" it. | |
2734 | ||
2735 | Return an expression for the entity, after issuing appropriate | |
2736 | diagnostics. This function is also responsible for transforming a | |
2737 | reference to a non-static member into a COMPONENT_REF that makes | |
c8094d83 | 2738 | the use of "this" explicit. |
b3445994 MM |
2739 | |
2740 | Upon return, *IDK will be filled in appropriately. */ | |
b3445994 | 2741 | tree |
c8094d83 | 2742 | finish_id_expression (tree id_expression, |
b3445994 MM |
2743 | tree decl, |
2744 | tree scope, | |
2745 | cp_id_kind *idk, | |
67c03833 JM |
2746 | bool integral_constant_expression_p, |
2747 | bool allow_non_integral_constant_expression_p, | |
2748 | bool *non_integral_constant_expression_p, | |
02ed62dd MM |
2749 | bool template_p, |
2750 | bool done, | |
2751 | bool address_p, | |
2752 | bool template_arg_p, | |
2b7a3abf DS |
2753 | const char **error_msg, |
2754 | location_t location) | |
b3445994 MM |
2755 | { |
2756 | /* Initialize the output parameters. */ | |
2757 | *idk = CP_ID_KIND_NONE; | |
2758 | *error_msg = NULL; | |
2759 | ||
2760 | if (id_expression == error_mark_node) | |
2761 | return error_mark_node; | |
2762 | /* If we have a template-id, then no further lookup is | |
2763 | required. If the template-id was for a template-class, we | |
2764 | will sometimes have a TYPE_DECL at this point. */ | |
2765 | else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
ee935db4 | 2766 | || TREE_CODE (decl) == TYPE_DECL) |
b3445994 MM |
2767 | ; |
2768 | /* Look up the name. */ | |
c8094d83 | 2769 | else |
b3445994 MM |
2770 | { |
2771 | if (decl == error_mark_node) | |
2772 | { | |
2773 | /* Name lookup failed. */ | |
c8094d83 MS |
2774 | if (scope |
2775 | && (!TYPE_P (scope) | |
4546865e MM |
2776 | || (!dependent_type_p (scope) |
2777 | && !(TREE_CODE (id_expression) == IDENTIFIER_NODE | |
2778 | && IDENTIFIER_TYPENAME_P (id_expression) | |
2779 | && dependent_type_p (TREE_TYPE (id_expression)))))) | |
b3445994 | 2780 | { |
4546865e MM |
2781 | /* If the qualifying type is non-dependent (and the name |
2782 | does not name a conversion operator to a dependent | |
2783 | type), issue an error. */ | |
2b7a3abf | 2784 | qualified_name_lookup_error (scope, id_expression, decl, location); |
b3445994 MM |
2785 | return error_mark_node; |
2786 | } | |
2787 | else if (!scope) | |
2788 | { | |
2789 | /* It may be resolved via Koenig lookup. */ | |
2790 | *idk = CP_ID_KIND_UNQUALIFIED; | |
2791 | return id_expression; | |
2792 | } | |
4546865e MM |
2793 | else |
2794 | decl = id_expression; | |
b3445994 MM |
2795 | } |
2796 | /* If DECL is a variable that would be out of scope under | |
2797 | ANSI/ISO rules, but in scope in the ARM, name lookup | |
2798 | will succeed. Issue a diagnostic here. */ | |
2799 | else | |
2800 | decl = check_for_out_of_scope_variable (decl); | |
2801 | ||
2802 | /* Remember that the name was used in the definition of | |
2803 | the current class so that we can check later to see if | |
2804 | the meaning would have been different after the class | |
2805 | was entirely defined. */ | |
2806 | if (!scope && decl != error_mark_node) | |
2807 | maybe_note_name_used_in_class (id_expression, decl); | |
8ca4bf25 | 2808 | |
d5f4eddd JM |
2809 | /* Disallow uses of local variables from containing functions, except |
2810 | within lambda-expressions. */ | |
9660afe0 JM |
2811 | if ((outer_automatic_var_p (decl) |
2812 | || outer_lambda_capture_p (decl)) | |
d5f4eddd JM |
2813 | /* It's not a use (3.2) if we're in an unevaluated context. */ |
2814 | && !cp_unevaluated_operand) | |
8ca4bf25 | 2815 | { |
d5f4eddd JM |
2816 | tree context = DECL_CONTEXT (decl); |
2817 | tree containing_function = current_function_decl; | |
2818 | tree lambda_stack = NULL_TREE; | |
2819 | tree lambda_expr = NULL_TREE; | |
9660afe0 | 2820 | tree initializer = decl; |
d5f4eddd JM |
2821 | |
2822 | /* Core issue 696: "[At the July 2009 meeting] the CWG expressed | |
2823 | support for an approach in which a reference to a local | |
2824 | [constant] automatic variable in a nested class or lambda body | |
2825 | would enter the expression as an rvalue, which would reduce | |
2826 | the complexity of the problem" | |
2827 | ||
2828 | FIXME update for final resolution of core issue 696. */ | |
aef4a215 | 2829 | if (decl_constant_var_p (decl)) |
d5f4eddd JM |
2830 | return integral_constant_value (decl); |
2831 | ||
9660afe0 JM |
2832 | if (TYPE_P (context)) |
2833 | { | |
2834 | /* Implicit capture of an explicit capture. */ | |
2835 | context = lambda_function (context); | |
2836 | initializer = thisify_lambda_field (decl); | |
2837 | } | |
2838 | ||
d5f4eddd JM |
2839 | /* If we are in a lambda function, we can move out until we hit |
2840 | 1. the context, | |
2841 | 2. a non-lambda function, or | |
2842 | 3. a non-default capturing lambda function. */ | |
2843 | while (context != containing_function | |
2844 | && LAMBDA_FUNCTION_P (containing_function)) | |
2845 | { | |
2846 | lambda_expr = CLASSTYPE_LAMBDA_EXPR | |
2847 | (DECL_CONTEXT (containing_function)); | |
2848 | ||
2849 | if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) | |
2850 | == CPLD_NONE) | |
2851 | break; | |
2852 | ||
2853 | lambda_stack = tree_cons (NULL_TREE, | |
2854 | lambda_expr, | |
2855 | lambda_stack); | |
2856 | ||
2857 | containing_function | |
2858 | = decl_function_context (containing_function); | |
2859 | } | |
2860 | ||
2861 | if (context == containing_function) | |
2862 | { | |
2863 | decl = add_default_capture (lambda_stack, | |
2864 | /*id=*/DECL_NAME (decl), | |
9660afe0 | 2865 | initializer); |
d5f4eddd JM |
2866 | } |
2867 | else if (lambda_expr) | |
2868 | { | |
2869 | error ("%qD is not captured", decl); | |
2870 | return error_mark_node; | |
2871 | } | |
2872 | else | |
8ca4bf25 MM |
2873 | { |
2874 | error (TREE_CODE (decl) == VAR_DECL | |
2875 | ? "use of %<auto%> variable from containing function" | |
2876 | : "use of parameter from containing function"); | |
2877 | error (" %q+#D declared here", decl); | |
2878 | return error_mark_node; | |
2879 | } | |
2880 | } | |
da9bc840 JM |
2881 | |
2882 | /* Also disallow uses of function parameters outside the function | |
2883 | body, except inside an unevaluated context (i.e. decltype). */ | |
2884 | if (TREE_CODE (decl) == PARM_DECL | |
2885 | && DECL_CONTEXT (decl) == NULL_TREE | |
2886 | && !cp_unevaluated_operand) | |
2887 | { | |
2888 | error ("use of parameter %qD outside function body", decl); | |
2889 | return error_mark_node; | |
2890 | } | |
b3445994 MM |
2891 | } |
2892 | ||
2893 | /* If we didn't find anything, or what we found was a type, | |
2894 | then this wasn't really an id-expression. */ | |
2895 | if (TREE_CODE (decl) == TEMPLATE_DECL | |
2896 | && !DECL_FUNCTION_TEMPLATE_P (decl)) | |
2897 | { | |
2898 | *error_msg = "missing template arguments"; | |
2899 | return error_mark_node; | |
2900 | } | |
2901 | else if (TREE_CODE (decl) == TYPE_DECL | |
2902 | || TREE_CODE (decl) == NAMESPACE_DECL) | |
2903 | { | |
2904 | *error_msg = "expected primary-expression"; | |
2905 | return error_mark_node; | |
2906 | } | |
2907 | ||
2908 | /* If the name resolved to a template parameter, there is no | |
931a9c05 GB |
2909 | need to look it up again later. */ |
2910 | if ((TREE_CODE (decl) == CONST_DECL && DECL_TEMPLATE_PARM_P (decl)) | |
2911 | || TREE_CODE (decl) == TEMPLATE_PARM_INDEX) | |
b3445994 | 2912 | { |
db24eb1f | 2913 | tree r; |
c8094d83 | 2914 | |
b3445994 | 2915 | *idk = CP_ID_KIND_NONE; |
931a9c05 GB |
2916 | if (TREE_CODE (decl) == TEMPLATE_PARM_INDEX) |
2917 | decl = TEMPLATE_PARM_DECL (decl); | |
db24eb1f | 2918 | r = convert_from_reference (DECL_INITIAL (decl)); |
c8094d83 MS |
2919 | |
2920 | if (integral_constant_expression_p | |
68deab91 | 2921 | && !dependent_type_p (TREE_TYPE (decl)) |
db24eb1f | 2922 | && !(INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (r)))) |
931a9c05 | 2923 | { |
67c03833 | 2924 | if (!allow_non_integral_constant_expression_p) |
a82e1a7d | 2925 | error ("template parameter %qD of type %qT is not allowed in " |
931a9c05 GB |
2926 | "an integral constant expression because it is not of " |
2927 | "integral or enumeration type", decl, TREE_TYPE (decl)); | |
67c03833 | 2928 | *non_integral_constant_expression_p = true; |
931a9c05 | 2929 | } |
db24eb1f | 2930 | return r; |
931a9c05 | 2931 | } |
c8094d83 | 2932 | /* Similarly, we resolve enumeration constants to their |
931a9c05 GB |
2933 | underlying values. */ |
2934 | else if (TREE_CODE (decl) == CONST_DECL) | |
2935 | { | |
2936 | *idk = CP_ID_KIND_NONE; | |
2937 | if (!processing_template_decl) | |
6193b8b7 DJ |
2938 | { |
2939 | used_types_insert (TREE_TYPE (decl)); | |
2940 | return DECL_INITIAL (decl); | |
2941 | } | |
b3445994 MM |
2942 | return decl; |
2943 | } | |
2944 | else | |
2945 | { | |
2946 | bool dependent_p; | |
2947 | ||
2948 | /* If the declaration was explicitly qualified indicate | |
2949 | that. The semantics of `A::f(3)' are different than | |
2950 | `f(3)' if `f' is virtual. */ | |
c8094d83 | 2951 | *idk = (scope |
b3445994 MM |
2952 | ? CP_ID_KIND_QUALIFIED |
2953 | : (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
2954 | ? CP_ID_KIND_TEMPLATE_ID | |
2955 | : CP_ID_KIND_UNQUALIFIED)); | |
2956 | ||
2957 | ||
2958 | /* [temp.dep.expr] | |
2959 | ||
2960 | An id-expression is type-dependent if it contains an | |
2961 | identifier that was declared with a dependent type. | |
2962 | ||
b3445994 MM |
2963 | The standard is not very specific about an id-expression that |
2964 | names a set of overloaded functions. What if some of them | |
2965 | have dependent types and some of them do not? Presumably, | |
2966 | such a name should be treated as a dependent name. */ | |
2967 | /* Assume the name is not dependent. */ | |
2968 | dependent_p = false; | |
2969 | if (!processing_template_decl) | |
2970 | /* No names are dependent outside a template. */ | |
2971 | ; | |
2972 | /* A template-id where the name of the template was not resolved | |
2973 | is definitely dependent. */ | |
2974 | else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
c8094d83 | 2975 | && (TREE_CODE (TREE_OPERAND (decl, 0)) |
b3445994 MM |
2976 | == IDENTIFIER_NODE)) |
2977 | dependent_p = true; | |
2978 | /* For anything except an overloaded function, just check its | |
2979 | type. */ | |
2980 | else if (!is_overloaded_fn (decl)) | |
c8094d83 | 2981 | dependent_p |
b3445994 MM |
2982 | = dependent_type_p (TREE_TYPE (decl)); |
2983 | /* For a set of overloaded functions, check each of the | |
2984 | functions. */ | |
2985 | else | |
2986 | { | |
2987 | tree fns = decl; | |
2988 | ||
2989 | if (BASELINK_P (fns)) | |
2990 | fns = BASELINK_FUNCTIONS (fns); | |
2991 | ||
2992 | /* For a template-id, check to see if the template | |
2993 | arguments are dependent. */ | |
2994 | if (TREE_CODE (fns) == TEMPLATE_ID_EXPR) | |
2995 | { | |
2996 | tree args = TREE_OPERAND (fns, 1); | |
2997 | dependent_p = any_dependent_template_arguments_p (args); | |
2998 | /* The functions are those referred to by the | |
2999 | template-id. */ | |
3000 | fns = TREE_OPERAND (fns, 0); | |
3001 | } | |
3002 | ||
3003 | /* If there are no dependent template arguments, go through | |
cd0be382 | 3004 | the overloaded functions. */ |
b3445994 MM |
3005 | while (fns && !dependent_p) |
3006 | { | |
3007 | tree fn = OVL_CURRENT (fns); | |
3008 | ||
3009 | /* Member functions of dependent classes are | |
3010 | dependent. */ | |
3011 | if (TREE_CODE (fn) == FUNCTION_DECL | |
3012 | && type_dependent_expression_p (fn)) | |
3013 | dependent_p = true; | |
3014 | else if (TREE_CODE (fn) == TEMPLATE_DECL | |
3015 | && dependent_template_p (fn)) | |
3016 | dependent_p = true; | |
3017 | ||
3018 | fns = OVL_NEXT (fns); | |
3019 | } | |
3020 | } | |
3021 | ||
3022 | /* If the name was dependent on a template parameter, we will | |
3023 | resolve the name at instantiation time. */ | |
3024 | if (dependent_p) | |
3025 | { | |
3026 | /* Create a SCOPE_REF for qualified names, if the scope is | |
3027 | dependent. */ | |
3028 | if (scope) | |
3029 | { | |
02ed62dd MM |
3030 | if (TYPE_P (scope)) |
3031 | { | |
3032 | if (address_p && done) | |
3033 | decl = finish_qualified_id_expr (scope, decl, | |
3034 | done, address_p, | |
3035 | template_p, | |
3036 | template_arg_p); | |
7e361ae6 JM |
3037 | else |
3038 | { | |
3039 | tree type = NULL_TREE; | |
3040 | if (DECL_P (decl) && !dependent_scope_p (scope)) | |
3041 | type = TREE_TYPE (decl); | |
3042 | decl = build_qualified_name (type, | |
3043 | scope, | |
3044 | id_expression, | |
3045 | template_p); | |
3046 | } | |
02ed62dd MM |
3047 | } |
3048 | if (TREE_TYPE (decl)) | |
3049 | decl = convert_from_reference (decl); | |
3050 | return decl; | |
b3445994 MM |
3051 | } |
3052 | /* A TEMPLATE_ID already contains all the information we | |
3053 | need. */ | |
3054 | if (TREE_CODE (id_expression) == TEMPLATE_ID_EXPR) | |
3055 | return id_expression; | |
10b1d5e7 | 3056 | *idk = CP_ID_KIND_UNQUALIFIED_DEPENDENT; |
5a98fa7b MM |
3057 | /* If we found a variable, then name lookup during the |
3058 | instantiation will always resolve to the same VAR_DECL | |
3059 | (or an instantiation thereof). */ | |
3c398f34 MM |
3060 | if (TREE_CODE (decl) == VAR_DECL |
3061 | || TREE_CODE (decl) == PARM_DECL) | |
db24eb1f | 3062 | return convert_from_reference (decl); |
bad1f462 KL |
3063 | /* The same is true for FIELD_DECL, but we also need to |
3064 | make sure that the syntax is correct. */ | |
3065 | else if (TREE_CODE (decl) == FIELD_DECL) | |
a26ddf11 KL |
3066 | { |
3067 | /* Since SCOPE is NULL here, this is an unqualified name. | |
3068 | Access checking has been performed during name lookup | |
3069 | already. Turn off checking to avoid duplicate errors. */ | |
3070 | push_deferring_access_checks (dk_no_check); | |
3071 | decl = finish_non_static_data_member | |
2defb926 | 3072 | (decl, NULL_TREE, |
a26ddf11 KL |
3073 | /*qualifying_scope=*/NULL_TREE); |
3074 | pop_deferring_access_checks (); | |
3075 | return decl; | |
3076 | } | |
10b1d5e7 | 3077 | return id_expression; |
b3445994 MM |
3078 | } |
3079 | ||
415d4636 | 3080 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
9e95d15f | 3081 | { |
a82e1a7d | 3082 | error ("use of namespace %qD as expression", decl); |
9e95d15f NS |
3083 | return error_mark_node; |
3084 | } | |
3085 | else if (DECL_CLASS_TEMPLATE_P (decl)) | |
3086 | { | |
a82e1a7d | 3087 | error ("use of class template %qT as expression", decl); |
9e95d15f NS |
3088 | return error_mark_node; |
3089 | } | |
3090 | else if (TREE_CODE (decl) == TREE_LIST) | |
3091 | { | |
3092 | /* Ambiguous reference to base members. */ | |
a82e1a7d | 3093 | error ("request for member %qD is ambiguous in " |
9e95d15f NS |
3094 | "multiple inheritance lattice", id_expression); |
3095 | print_candidates (decl); | |
3096 | return error_mark_node; | |
3097 | } | |
415d4636 MM |
3098 | |
3099 | /* Mark variable-like entities as used. Functions are similarly | |
3100 | marked either below or after overload resolution. */ | |
3101 | if (TREE_CODE (decl) == VAR_DECL | |
3102 | || TREE_CODE (decl) == PARM_DECL | |
3103 | || TREE_CODE (decl) == RESULT_DECL) | |
3104 | mark_used (decl); | |
3105 | ||
aef4a215 JM |
3106 | /* Only certain kinds of names are allowed in constant |
3107 | expression. Enumerators and template parameters have already | |
3108 | been handled above. */ | |
3109 | if (integral_constant_expression_p | |
3110 | && ! decl_constant_var_p (decl) | |
3111 | && ! builtin_valid_in_constant_expr_p (decl)) | |
3112 | { | |
3113 | if (!allow_non_integral_constant_expression_p) | |
3114 | { | |
3115 | error ("%qD cannot appear in a constant-expression", decl); | |
3116 | return error_mark_node; | |
3117 | } | |
3118 | *non_integral_constant_expression_p = true; | |
3119 | } | |
3120 | ||
415d4636 MM |
3121 | if (scope) |
3122 | { | |
c8094d83 | 3123 | decl = (adjust_result_of_qualified_name_lookup |
415d4636 | 3124 | (decl, scope, current_class_type)); |
e20bcc5e JH |
3125 | |
3126 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
3127 | mark_used (decl); | |
3128 | ||
415d4636 | 3129 | if (TREE_CODE (decl) == FIELD_DECL || BASELINK_P (decl)) |
02ed62dd MM |
3130 | decl = finish_qualified_id_expr (scope, |
3131 | decl, | |
3132 | done, | |
3133 | address_p, | |
3134 | template_p, | |
3135 | template_arg_p); | |
db24eb1f NS |
3136 | else |
3137 | { | |
3138 | tree r = convert_from_reference (decl); | |
c8094d83 | 3139 | |
d3a79fcc JM |
3140 | /* In a template, return a SCOPE_REF for most qualified-ids |
3141 | so that we can check access at instantiation time. But if | |
3142 | we're looking at a member of the current instantiation, we | |
3143 | know we have access and building up the SCOPE_REF confuses | |
3144 | non-type template argument handling. */ | |
3145 | if (processing_template_decl && TYPE_P (scope) | |
3146 | && !currently_open_class (scope)) | |
02ed62dd MM |
3147 | r = build_qualified_name (TREE_TYPE (r), |
3148 | scope, decl, | |
3149 | template_p); | |
db24eb1f NS |
3150 | decl = r; |
3151 | } | |
415d4636 | 3152 | } |
9e95d15f | 3153 | else if (TREE_CODE (decl) == FIELD_DECL) |
a26ddf11 KL |
3154 | { |
3155 | /* Since SCOPE is NULL here, this is an unqualified name. | |
3156 | Access checking has been performed during name lookup | |
3157 | already. Turn off checking to avoid duplicate errors. */ | |
3158 | push_deferring_access_checks (dk_no_check); | |
2defb926 | 3159 | decl = finish_non_static_data_member (decl, NULL_TREE, |
a26ddf11 KL |
3160 | /*qualifying_scope=*/NULL_TREE); |
3161 | pop_deferring_access_checks (); | |
3162 | } | |
9e95d15f NS |
3163 | else if (is_overloaded_fn (decl)) |
3164 | { | |
eff3a276 | 3165 | tree first_fn; |
b3445994 | 3166 | |
294e855f | 3167 | first_fn = get_first_fn (decl); |
9e95d15f NS |
3168 | if (TREE_CODE (first_fn) == TEMPLATE_DECL) |
3169 | first_fn = DECL_TEMPLATE_RESULT (first_fn); | |
415d4636 MM |
3170 | |
3171 | if (!really_overloaded_fn (decl)) | |
3172 | mark_used (first_fn); | |
3173 | ||
02ed62dd MM |
3174 | if (!template_arg_p |
3175 | && TREE_CODE (first_fn) == FUNCTION_DECL | |
821eaf2a MM |
3176 | && DECL_FUNCTION_MEMBER_P (first_fn) |
3177 | && !shared_member_p (decl)) | |
9e95d15f NS |
3178 | { |
3179 | /* A set of member functions. */ | |
3180 | decl = maybe_dummy_object (DECL_CONTEXT (first_fn), 0); | |
02ed62dd | 3181 | return finish_class_member_access_expr (decl, id_expression, |
5ade1ed2 DG |
3182 | /*template_p=*/false, |
3183 | tf_warning_or_error); | |
9e95d15f | 3184 | } |
eff3a276 MM |
3185 | |
3186 | decl = baselink_for_fns (decl); | |
9e95d15f NS |
3187 | } |
3188 | else | |
3189 | { | |
9e95d15f | 3190 | if (DECL_P (decl) && DECL_NONLOCAL (decl) |
24f58e74 | 3191 | && DECL_CLASS_SCOPE_P (decl)) |
9e95d15f | 3192 | { |
24f58e74 PC |
3193 | tree context = context_for_name_lookup (decl); |
3194 | if (context != current_class_type) | |
3195 | { | |
3196 | tree path = currently_open_derived_class (context); | |
3197 | perform_or_defer_access_check (TYPE_BINFO (path), | |
3198 | decl, decl); | |
3199 | } | |
9e95d15f | 3200 | } |
c8094d83 | 3201 | |
db24eb1f | 3202 | decl = convert_from_reference (decl); |
9e95d15f | 3203 | } |
b3445994 MM |
3204 | } |
3205 | ||
3206 | if (TREE_DEPRECATED (decl)) | |
9b86d6bb | 3207 | warn_deprecated_use (decl, NULL_TREE); |
b3445994 MM |
3208 | |
3209 | return decl; | |
3210 | } | |
3211 | ||
0213a355 JM |
3212 | /* Implement the __typeof keyword: Return the type of EXPR, suitable for |
3213 | use as a type-specifier. */ | |
3214 | ||
b894fc05 | 3215 | tree |
3a978d72 | 3216 | finish_typeof (tree expr) |
b894fc05 | 3217 | { |
65a5559b MM |
3218 | tree type; |
3219 | ||
dffbbe80 | 3220 | if (type_dependent_expression_p (expr)) |
b894fc05 | 3221 | { |
9e1e64ec | 3222 | type = cxx_make_type (TYPEOF_TYPE); |
eb34af89 | 3223 | TYPEOF_TYPE_EXPR (type) = expr; |
3ad6a8e1 | 3224 | SET_TYPE_STRUCTURAL_EQUALITY (type); |
b894fc05 | 3225 | |
65a5559b | 3226 | return type; |
b894fc05 JM |
3227 | } |
3228 | ||
03a904b5 JJ |
3229 | expr = mark_type_use (expr); |
3230 | ||
3c38f0ff | 3231 | type = unlowered_expr_type (expr); |
65a5559b MM |
3232 | |
3233 | if (!type || type == unknown_type_node) | |
3234 | { | |
a82e1a7d | 3235 | error ("type of %qE is unknown", expr); |
65a5559b MM |
3236 | return error_mark_node; |
3237 | } | |
3238 | ||
3239 | return type; | |
b894fc05 | 3240 | } |
558475f0 | 3241 | |
c291f8b1 VR |
3242 | /* Perform C++-specific checks for __builtin_offsetof before calling |
3243 | fold_offsetof. */ | |
3244 | ||
3245 | tree | |
3246 | finish_offsetof (tree expr) | |
3247 | { | |
4c65a534 VR |
3248 | if (TREE_CODE (expr) == PSEUDO_DTOR_EXPR) |
3249 | { | |
3250 | error ("cannot apply %<offsetof%> to destructor %<~%T%>", | |
3251 | TREE_OPERAND (expr, 2)); | |
3252 | return error_mark_node; | |
3253 | } | |
c291f8b1 VR |
3254 | if (TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE |
3255 | || TREE_CODE (TREE_TYPE (expr)) == METHOD_TYPE | |
fbfc8363 | 3256 | || TREE_TYPE (expr) == unknown_type_node) |
c291f8b1 | 3257 | { |
1916c916 VR |
3258 | if (TREE_CODE (expr) == COMPONENT_REF |
3259 | || TREE_CODE (expr) == COMPOUND_EXPR) | |
0a9367cb VR |
3260 | expr = TREE_OPERAND (expr, 1); |
3261 | error ("cannot apply %<offsetof%> to member function %qD", expr); | |
c291f8b1 VR |
3262 | return error_mark_node; |
3263 | } | |
60c4d135 JJ |
3264 | if (TREE_CODE (expr) == INDIRECT_REF && REFERENCE_REF_P (expr)) |
3265 | expr = TREE_OPERAND (expr, 0); | |
6d4d7b0e | 3266 | return fold_offsetof (expr, NULL_TREE); |
c291f8b1 VR |
3267 | } |
3268 | ||
9eeb200f JM |
3269 | /* Replace the AGGR_INIT_EXPR at *TP with an equivalent CALL_EXPR. This |
3270 | function is broken out from the above for the benefit of the tree-ssa | |
3271 | project. */ | |
3272 | ||
3273 | void | |
3274 | simplify_aggr_init_expr (tree *tp) | |
3275 | { | |
3276 | tree aggr_init_expr = *tp; | |
3277 | ||
3eb24f73 | 3278 | /* Form an appropriate CALL_EXPR. */ |
5039610b SL |
3279 | tree fn = AGGR_INIT_EXPR_FN (aggr_init_expr); |
3280 | tree slot = AGGR_INIT_EXPR_SLOT (aggr_init_expr); | |
2692eb7d | 3281 | tree type = TREE_TYPE (slot); |
9eeb200f JM |
3282 | |
3283 | tree call_expr; | |
3284 | enum style_t { ctor, arg, pcc } style; | |
4977bab6 | 3285 | |
3eb24f73 | 3286 | if (AGGR_INIT_VIA_CTOR_P (aggr_init_expr)) |
4977bab6 ZW |
3287 | style = ctor; |
3288 | #ifdef PCC_STATIC_STRUCT_RETURN | |
3289 | else if (1) | |
3290 | style = pcc; | |
3291 | #endif | |
4977bab6 | 3292 | else |
315fb5db NS |
3293 | { |
3294 | gcc_assert (TREE_ADDRESSABLE (type)); | |
3295 | style = arg; | |
3296 | } | |
4977bab6 | 3297 | |
db3927fb AH |
3298 | call_expr = build_call_array_loc (input_location, |
3299 | TREE_TYPE (TREE_TYPE (TREE_TYPE (fn))), | |
3300 | fn, | |
3301 | aggr_init_expr_nargs (aggr_init_expr), | |
3302 | AGGR_INIT_EXPR_ARGP (aggr_init_expr)); | |
d8a0d13e | 3303 | TREE_NOTHROW (call_expr) = TREE_NOTHROW (aggr_init_expr); |
5039610b | 3304 | |
fa47911c | 3305 | if (style == ctor) |
3eb24f73 | 3306 | { |
fa47911c JM |
3307 | /* Replace the first argument to the ctor with the address of the |
3308 | slot. */ | |
dffd7eb6 | 3309 | cxx_mark_addressable (slot); |
5039610b SL |
3310 | CALL_EXPR_ARG (call_expr, 0) = |
3311 | build1 (ADDR_EXPR, build_pointer_type (type), slot); | |
3eb24f73 | 3312 | } |
5039610b | 3313 | else if (style == arg) |
fa47911c JM |
3314 | { |
3315 | /* Just mark it addressable here, and leave the rest to | |
3316 | expand_call{,_inline}. */ | |
3317 | cxx_mark_addressable (slot); | |
3318 | CALL_EXPR_RETURN_SLOT_OPT (call_expr) = true; | |
941f78d1 | 3319 | call_expr = build2 (INIT_EXPR, TREE_TYPE (call_expr), slot, call_expr); |
fa47911c | 3320 | } |
4977bab6 | 3321 | else if (style == pcc) |
3eb24f73 | 3322 | { |
4977bab6 ZW |
3323 | /* If we're using the non-reentrant PCC calling convention, then we |
3324 | need to copy the returned value out of the static buffer into the | |
3325 | SLOT. */ | |
78757caa | 3326 | push_deferring_access_checks (dk_no_check); |
46af705a | 3327 | call_expr = build_aggr_init (slot, call_expr, |
5ade1ed2 DG |
3328 | DIRECT_BIND | LOOKUP_ONLYCONVERTING, |
3329 | tf_warning_or_error); | |
78757caa | 3330 | pop_deferring_access_checks (); |
d17791d6 | 3331 | call_expr = build2 (COMPOUND_EXPR, TREE_TYPE (slot), call_expr, slot); |
3eb24f73 | 3332 | } |
3eb24f73 | 3333 | |
450a927a JM |
3334 | if (AGGR_INIT_ZERO_FIRST (aggr_init_expr)) |
3335 | { | |
3336 | tree init = build_zero_init (type, NULL_TREE, | |
3337 | /*static_storage_p=*/false); | |
3338 | init = build2 (INIT_EXPR, void_type_node, slot, init); | |
3339 | call_expr = build2 (COMPOUND_EXPR, TREE_TYPE (call_expr), | |
3340 | init, call_expr); | |
3341 | } | |
3342 | ||
3eb24f73 | 3343 | *tp = call_expr; |
3eb24f73 MM |
3344 | } |
3345 | ||
31f8e4f3 MM |
3346 | /* Emit all thunks to FN that should be emitted when FN is emitted. */ |
3347 | ||
e89d6010 | 3348 | void |
3a978d72 | 3349 | emit_associated_thunks (tree fn) |
31f8e4f3 MM |
3350 | { |
3351 | /* When we use vcall offsets, we emit thunks with the virtual | |
3352 | functions to which they thunk. The whole point of vcall offsets | |
3353 | is so that you can know statically the entire set of thunks that | |
3354 | will ever be needed for a given virtual function, thereby | |
3355 | enabling you to output all the thunks with the function itself. */ | |
4537ec0c DN |
3356 | if (DECL_VIRTUAL_P (fn) |
3357 | /* Do not emit thunks for extern template instantiations. */ | |
3358 | && ! DECL_REALLY_EXTERN (fn)) | |
31f8e4f3 | 3359 | { |
bb5e8a7f | 3360 | tree thunk; |
c8094d83 | 3361 | |
910ad8de | 3362 | for (thunk = DECL_THUNKS (fn); thunk; thunk = DECL_CHAIN (thunk)) |
4977bab6 | 3363 | { |
e00853fd | 3364 | if (!THUNK_ALIAS (thunk)) |
4977bab6 | 3365 | { |
bb885938 NS |
3366 | use_thunk (thunk, /*emit_p=*/1); |
3367 | if (DECL_RESULT_THUNK_P (thunk)) | |
3368 | { | |
3369 | tree probe; | |
c8094d83 | 3370 | |
bb885938 | 3371 | for (probe = DECL_THUNKS (thunk); |
910ad8de | 3372 | probe; probe = DECL_CHAIN (probe)) |
bb885938 NS |
3373 | use_thunk (probe, /*emit_p=*/1); |
3374 | } | |
4977bab6 | 3375 | } |
bb885938 | 3376 | else |
50bc768d | 3377 | gcc_assert (!DECL_THUNKS (thunk)); |
4977bab6 | 3378 | } |
31f8e4f3 MM |
3379 | } |
3380 | } | |
3381 | ||
558475f0 MM |
3382 | /* Generate RTL for FN. */ |
3383 | ||
b2583345 JJ |
3384 | bool |
3385 | expand_or_defer_fn_1 (tree fn) | |
8cd2462c JH |
3386 | { |
3387 | /* When the parser calls us after finishing the body of a template | |
c353b8e3 MM |
3388 | function, we don't really want to expand the body. */ |
3389 | if (processing_template_decl) | |
8cd2462c JH |
3390 | { |
3391 | /* Normally, collection only occurs in rest_of_compilation. So, | |
3392 | if we don't collect here, we never collect junk generated | |
3393 | during the processing of templates until we hit a | |
27250734 MM |
3394 | non-template function. It's not safe to do this inside a |
3395 | nested class, though, as the parser may have local state that | |
3396 | is not a GC root. */ | |
3397 | if (!function_depth) | |
3398 | ggc_collect (); | |
b2583345 | 3399 | return false; |
8cd2462c JH |
3400 | } |
3401 | ||
a406865a | 3402 | gcc_assert (DECL_SAVED_TREE (fn)); |
726a989a | 3403 | |
8cd2462c JH |
3404 | /* If this is a constructor or destructor body, we have to clone |
3405 | it. */ | |
3406 | if (maybe_clone_body (fn)) | |
3407 | { | |
3408 | /* We don't want to process FN again, so pretend we've written | |
3409 | it out, even though we haven't. */ | |
3410 | TREE_ASM_WRITTEN (fn) = 1; | |
c6a21142 | 3411 | DECL_SAVED_TREE (fn) = NULL_TREE; |
b2583345 | 3412 | return false; |
8cd2462c JH |
3413 | } |
3414 | ||
4684cd27 MM |
3415 | /* We make a decision about linkage for these functions at the end |
3416 | of the compilation. Until that point, we do not want the back | |
3417 | end to output them -- but we do want it to see the bodies of | |
1a10290c | 3418 | these functions so that it can inline them as appropriate. */ |
4684cd27 MM |
3419 | if (DECL_DECLARED_INLINE_P (fn) || DECL_IMPLICIT_INSTANTIATION (fn)) |
3420 | { | |
1ef0df47 MM |
3421 | if (DECL_INTERFACE_KNOWN (fn)) |
3422 | /* We've already made a decision as to how this function will | |
3423 | be handled. */; | |
3424 | else if (!at_eof) | |
4684cd27 MM |
3425 | { |
3426 | DECL_EXTERNAL (fn) = 1; | |
3427 | DECL_NOT_REALLY_EXTERN (fn) = 1; | |
3428 | note_vague_linkage_fn (fn); | |
1ef0df47 MM |
3429 | /* A non-template inline function with external linkage will |
3430 | always be COMDAT. As we must eventually determine the | |
3431 | linkage of all functions, and as that causes writes to | |
3432 | the data mapped in from the PCH file, it's advantageous | |
3433 | to mark the functions at this point. */ | |
3434 | if (!DECL_IMPLICIT_INSTANTIATION (fn)) | |
3435 | { | |
3436 | /* This function must have external linkage, as | |
3437 | otherwise DECL_INTERFACE_KNOWN would have been | |
3438 | set. */ | |
3439 | gcc_assert (TREE_PUBLIC (fn)); | |
3440 | comdat_linkage (fn); | |
3441 | DECL_INTERFACE_KNOWN (fn) = 1; | |
3442 | } | |
4684cd27 MM |
3443 | } |
3444 | else | |
3445 | import_export_decl (fn); | |
1a10290c MM |
3446 | |
3447 | /* If the user wants us to keep all inline functions, then mark | |
3448 | this function as needed so that finish_file will make sure to | |
fe2978fb MM |
3449 | output it later. Similarly, all dllexport'd functions must |
3450 | be emitted; there may be callers in other DLLs. */ | |
3fc20697 RG |
3451 | if ((flag_keep_inline_functions |
3452 | && DECL_DECLARED_INLINE_P (fn) | |
3453 | && !DECL_REALLY_EXTERN (fn)) | |
fe2978fb | 3454 | || lookup_attribute ("dllexport", DECL_ATTRIBUTES (fn))) |
1a10290c | 3455 | mark_needed (fn); |
4684cd27 MM |
3456 | } |
3457 | ||
8cd2462c JH |
3458 | /* There's no reason to do any of the work here if we're only doing |
3459 | semantic analysis; this code just generates RTL. */ | |
3460 | if (flag_syntax_only) | |
b2583345 JJ |
3461 | return false; |
3462 | ||
3463 | return true; | |
3464 | } | |
8cd2462c | 3465 | |
b2583345 JJ |
3466 | void |
3467 | expand_or_defer_fn (tree fn) | |
3468 | { | |
3469 | if (expand_or_defer_fn_1 (fn)) | |
3470 | { | |
3471 | function_depth++; | |
99edd65d | 3472 | |
b2583345 JJ |
3473 | /* Expand or defer, at the whim of the compilation unit manager. */ |
3474 | cgraph_finalize_function (fn, function_depth > 1); | |
6744a6ab | 3475 | emit_associated_thunks (fn); |
99edd65d | 3476 | |
b2583345 JJ |
3477 | function_depth--; |
3478 | } | |
8cd2462c JH |
3479 | } |
3480 | ||
6de9cd9a DN |
3481 | struct nrv_data |
3482 | { | |
3483 | tree var; | |
3484 | tree result; | |
3485 | htab_t visited; | |
3486 | }; | |
0d97bf4c | 3487 | |
6de9cd9a DN |
3488 | /* Helper function for walk_tree, used by finalize_nrv below. */ |
3489 | ||
3490 | static tree | |
3491 | finalize_nrv_r (tree* tp, int* walk_subtrees, void* data) | |
0d97bf4c | 3492 | { |
6de9cd9a DN |
3493 | struct nrv_data *dp = (struct nrv_data *)data; |
3494 | void **slot; | |
07b2f2fd JM |
3495 | |
3496 | /* No need to walk into types. There wouldn't be any need to walk into | |
3497 | non-statements, except that we have to consider STMT_EXPRs. */ | |
0d97bf4c JM |
3498 | if (TYPE_P (*tp)) |
3499 | *walk_subtrees = 0; | |
6de9cd9a DN |
3500 | /* Change all returns to just refer to the RESULT_DECL; this is a nop, |
3501 | but differs from using NULL_TREE in that it indicates that we care | |
3502 | about the value of the RESULT_DECL. */ | |
5088b058 RH |
3503 | else if (TREE_CODE (*tp) == RETURN_EXPR) |
3504 | TREE_OPERAND (*tp, 0) = dp->result; | |
6de9cd9a DN |
3505 | /* Change all cleanups for the NRV to only run when an exception is |
3506 | thrown. */ | |
07b2f2fd | 3507 | else if (TREE_CODE (*tp) == CLEANUP_STMT |
6de9cd9a | 3508 | && CLEANUP_DECL (*tp) == dp->var) |
659e5a7a | 3509 | CLEANUP_EH_ONLY (*tp) = 1; |
350fae66 | 3510 | /* Replace the DECL_EXPR for the NRV with an initialization of the |
6de9cd9a | 3511 | RESULT_DECL, if needed. */ |
350fae66 RK |
3512 | else if (TREE_CODE (*tp) == DECL_EXPR |
3513 | && DECL_EXPR_DECL (*tp) == dp->var) | |
6de9cd9a DN |
3514 | { |
3515 | tree init; | |
3516 | if (DECL_INITIAL (dp->var) | |
3517 | && DECL_INITIAL (dp->var) != error_mark_node) | |
2d188530 JJ |
3518 | init = build2 (INIT_EXPR, void_type_node, dp->result, |
3519 | DECL_INITIAL (dp->var)); | |
6de9cd9a | 3520 | else |
c2255bc4 | 3521 | init = build_empty_stmt (EXPR_LOCATION (*tp)); |
2d188530 | 3522 | DECL_INITIAL (dp->var) = NULL_TREE; |
5e278028 | 3523 | SET_EXPR_LOCATION (init, EXPR_LOCATION (*tp)); |
6de9cd9a DN |
3524 | *tp = init; |
3525 | } | |
3526 | /* And replace all uses of the NRV with the RESULT_DECL. */ | |
3527 | else if (*tp == dp->var) | |
3528 | *tp = dp->result; | |
3529 | ||
3530 | /* Avoid walking into the same tree more than once. Unfortunately, we | |
3531 | can't just use walk_tree_without duplicates because it would only call | |
3532 | us for the first occurrence of dp->var in the function body. */ | |
3533 | slot = htab_find_slot (dp->visited, *tp, INSERT); | |
3534 | if (*slot) | |
3535 | *walk_subtrees = 0; | |
3536 | else | |
3537 | *slot = *tp; | |
0d97bf4c JM |
3538 | |
3539 | /* Keep iterating. */ | |
3540 | return NULL_TREE; | |
3541 | } | |
3542 | ||
6de9cd9a | 3543 | /* Called from finish_function to implement the named return value |
5088b058 | 3544 | optimization by overriding all the RETURN_EXPRs and pertinent |
6de9cd9a DN |
3545 | CLEANUP_STMTs and replacing all occurrences of VAR with RESULT, the |
3546 | RESULT_DECL for the function. */ | |
f444e36b | 3547 | |
4985cde3 | 3548 | void |
6de9cd9a | 3549 | finalize_nrv (tree *tp, tree var, tree result) |
f444e36b | 3550 | { |
6de9cd9a DN |
3551 | struct nrv_data data; |
3552 | ||
add86e09 | 3553 | /* Copy name from VAR to RESULT. */ |
6de9cd9a | 3554 | DECL_NAME (result) = DECL_NAME (var); |
6de9cd9a DN |
3555 | /* Don't forget that we take its address. */ |
3556 | TREE_ADDRESSABLE (result) = TREE_ADDRESSABLE (var); | |
add86e09 JJ |
3557 | /* Finally set DECL_VALUE_EXPR to avoid assigning |
3558 | a stack slot at -O0 for the original var and debug info | |
3559 | uses RESULT location for VAR. */ | |
3560 | SET_DECL_VALUE_EXPR (var, result); | |
3561 | DECL_HAS_VALUE_EXPR_P (var) = 1; | |
6de9cd9a DN |
3562 | |
3563 | data.var = var; | |
3564 | data.result = result; | |
3565 | data.visited = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL); | |
14588106 | 3566 | cp_walk_tree (tp, finalize_nrv_r, &data, 0); |
6de9cd9a | 3567 | htab_delete (data.visited); |
b850de4f | 3568 | } |
1799e5d5 | 3569 | \f |
a68ab351 JJ |
3570 | /* Create CP_OMP_CLAUSE_INFO for clause C. Returns true if it is invalid. */ |
3571 | ||
3572 | bool | |
3573 | cxx_omp_create_clause_info (tree c, tree type, bool need_default_ctor, | |
3574 | bool need_copy_ctor, bool need_copy_assignment) | |
3575 | { | |
3576 | int save_errorcount = errorcount; | |
3577 | tree info, t; | |
3578 | ||
3579 | /* Always allocate 3 elements for simplicity. These are the | |
3580 | function decls for the ctor, dtor, and assignment op. | |
3581 | This layout is known to the three lang hooks, | |
3582 | cxx_omp_clause_default_init, cxx_omp_clause_copy_init, | |
3583 | and cxx_omp_clause_assign_op. */ | |
3584 | info = make_tree_vec (3); | |
3585 | CP_OMP_CLAUSE_INFO (c) = info; | |
3586 | ||
ac177431 | 3587 | if (need_default_ctor || need_copy_ctor) |
a68ab351 JJ |
3588 | { |
3589 | if (need_default_ctor) | |
ac177431 | 3590 | t = get_default_ctor (type); |
a68ab351 | 3591 | else |
ac177431 JM |
3592 | t = get_copy_ctor (type); |
3593 | ||
3594 | if (t && !trivial_fn_p (t)) | |
3595 | TREE_VEC_ELT (info, 0) = t; | |
a68ab351 JJ |
3596 | } |
3597 | ||
3598 | if ((need_default_ctor || need_copy_ctor) | |
3599 | && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)) | |
ac177431 | 3600 | TREE_VEC_ELT (info, 1) = get_dtor (type); |
a68ab351 | 3601 | |
ac177431 | 3602 | if (need_copy_assignment) |
a68ab351 | 3603 | { |
ac177431 JM |
3604 | t = get_copy_assign (type); |
3605 | ||
3606 | if (t && !trivial_fn_p (t)) | |
3607 | TREE_VEC_ELT (info, 2) = t; | |
a68ab351 JJ |
3608 | } |
3609 | ||
3610 | return errorcount != save_errorcount; | |
3611 | } | |
3612 | ||
1799e5d5 RH |
3613 | /* For all elements of CLAUSES, validate them vs OpenMP constraints. |
3614 | Remove any elements from the list that are invalid. */ | |
3615 | ||
3616 | tree | |
3617 | finish_omp_clauses (tree clauses) | |
3618 | { | |
3619 | bitmap_head generic_head, firstprivate_head, lastprivate_head; | |
3620 | tree c, t, *pc = &clauses; | |
3621 | const char *name; | |
3622 | ||
3623 | bitmap_obstack_initialize (NULL); | |
3624 | bitmap_initialize (&generic_head, &bitmap_default_obstack); | |
3625 | bitmap_initialize (&firstprivate_head, &bitmap_default_obstack); | |
3626 | bitmap_initialize (&lastprivate_head, &bitmap_default_obstack); | |
3627 | ||
3628 | for (pc = &clauses, c = clauses; c ; c = *pc) | |
3629 | { | |
3630 | bool remove = false; | |
3631 | ||
3632 | switch (OMP_CLAUSE_CODE (c)) | |
3633 | { | |
3634 | case OMP_CLAUSE_SHARED: | |
3635 | name = "shared"; | |
3636 | goto check_dup_generic; | |
3637 | case OMP_CLAUSE_PRIVATE: | |
3638 | name = "private"; | |
3639 | goto check_dup_generic; | |
3640 | case OMP_CLAUSE_REDUCTION: | |
3641 | name = "reduction"; | |
3642 | goto check_dup_generic; | |
3643 | case OMP_CLAUSE_COPYPRIVATE: | |
3644 | name = "copyprivate"; | |
3645 | goto check_dup_generic; | |
3646 | case OMP_CLAUSE_COPYIN: | |
3647 | name = "copyin"; | |
3648 | goto check_dup_generic; | |
3649 | check_dup_generic: | |
3650 | t = OMP_CLAUSE_DECL (c); | |
3651 | if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
3652 | { | |
3653 | if (processing_template_decl) | |
3654 | break; | |
76dc15d4 JJ |
3655 | if (DECL_P (t)) |
3656 | error ("%qD is not a variable in clause %qs", t, name); | |
3657 | else | |
3658 | error ("%qE is not a variable in clause %qs", t, name); | |
1799e5d5 RH |
3659 | remove = true; |
3660 | } | |
3661 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
3662 | || bitmap_bit_p (&firstprivate_head, DECL_UID (t)) | |
3663 | || bitmap_bit_p (&lastprivate_head, DECL_UID (t))) | |
3664 | { | |
76dc15d4 | 3665 | error ("%qD appears more than once in data clauses", t); |
1799e5d5 RH |
3666 | remove = true; |
3667 | } | |
3668 | else | |
3669 | bitmap_set_bit (&generic_head, DECL_UID (t)); | |
3670 | break; | |
3671 | ||
3672 | case OMP_CLAUSE_FIRSTPRIVATE: | |
3673 | t = OMP_CLAUSE_DECL (c); | |
3674 | if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
3675 | { | |
3676 | if (processing_template_decl) | |
3677 | break; | |
85b20612 JJ |
3678 | if (DECL_P (t)) |
3679 | error ("%qD is not a variable in clause %<firstprivate%>", t); | |
3680 | else | |
3681 | error ("%qE is not a variable in clause %<firstprivate%>", t); | |
1799e5d5 RH |
3682 | remove = true; |
3683 | } | |
3684 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
3685 | || bitmap_bit_p (&firstprivate_head, DECL_UID (t))) | |
3686 | { | |
85b20612 | 3687 | error ("%qD appears more than once in data clauses", t); |
1799e5d5 RH |
3688 | remove = true; |
3689 | } | |
3690 | else | |
3691 | bitmap_set_bit (&firstprivate_head, DECL_UID (t)); | |
3692 | break; | |
3693 | ||
3694 | case OMP_CLAUSE_LASTPRIVATE: | |
3695 | t = OMP_CLAUSE_DECL (c); | |
3696 | if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
3697 | { | |
3698 | if (processing_template_decl) | |
3699 | break; | |
85b20612 JJ |
3700 | if (DECL_P (t)) |
3701 | error ("%qD is not a variable in clause %<lastprivate%>", t); | |
3702 | else | |
3703 | error ("%qE is not a variable in clause %<lastprivate%>", t); | |
1799e5d5 RH |
3704 | remove = true; |
3705 | } | |
3706 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
3707 | || bitmap_bit_p (&lastprivate_head, DECL_UID (t))) | |
3708 | { | |
85b20612 | 3709 | error ("%qD appears more than once in data clauses", t); |
1799e5d5 RH |
3710 | remove = true; |
3711 | } | |
3712 | else | |
3713 | bitmap_set_bit (&lastprivate_head, DECL_UID (t)); | |
3714 | break; | |
3715 | ||
3716 | case OMP_CLAUSE_IF: | |
3717 | t = OMP_CLAUSE_IF_EXPR (c); | |
3718 | t = maybe_convert_cond (t); | |
3719 | if (t == error_mark_node) | |
3720 | remove = true; | |
3721 | OMP_CLAUSE_IF_EXPR (c) = t; | |
3722 | break; | |
3723 | ||
3724 | case OMP_CLAUSE_NUM_THREADS: | |
3725 | t = OMP_CLAUSE_NUM_THREADS_EXPR (c); | |
3726 | if (t == error_mark_node) | |
3727 | remove = true; | |
6e684eee JJ |
3728 | else if (!type_dependent_expression_p (t) |
3729 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
1799e5d5 RH |
3730 | { |
3731 | error ("num_threads expression must be integral"); | |
3732 | remove = true; | |
3733 | } | |
3734 | break; | |
3735 | ||
3736 | case OMP_CLAUSE_SCHEDULE: | |
3737 | t = OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c); | |
3738 | if (t == NULL) | |
3739 | ; | |
3740 | else if (t == error_mark_node) | |
3741 | remove = true; | |
6e684eee JJ |
3742 | else if (!type_dependent_expression_p (t) |
3743 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
1799e5d5 RH |
3744 | { |
3745 | error ("schedule chunk size expression must be integral"); | |
3746 | remove = true; | |
3747 | } | |
3748 | break; | |
3749 | ||
3750 | case OMP_CLAUSE_NOWAIT: | |
3751 | case OMP_CLAUSE_ORDERED: | |
3752 | case OMP_CLAUSE_DEFAULT: | |
a68ab351 JJ |
3753 | case OMP_CLAUSE_UNTIED: |
3754 | case OMP_CLAUSE_COLLAPSE: | |
1799e5d5 RH |
3755 | break; |
3756 | ||
3757 | default: | |
3758 | gcc_unreachable (); | |
3759 | } | |
3760 | ||
3761 | if (remove) | |
3762 | *pc = OMP_CLAUSE_CHAIN (c); | |
3763 | else | |
3764 | pc = &OMP_CLAUSE_CHAIN (c); | |
3765 | } | |
3766 | ||
3767 | for (pc = &clauses, c = clauses; c ; c = *pc) | |
3768 | { | |
81f40b79 | 3769 | enum omp_clause_code c_kind = OMP_CLAUSE_CODE (c); |
1799e5d5 RH |
3770 | bool remove = false; |
3771 | bool need_complete_non_reference = false; | |
3772 | bool need_default_ctor = false; | |
3773 | bool need_copy_ctor = false; | |
3774 | bool need_copy_assignment = false; | |
3775 | bool need_implicitly_determined = false; | |
3776 | tree type, inner_type; | |
3777 | ||
3778 | switch (c_kind) | |
3779 | { | |
3780 | case OMP_CLAUSE_SHARED: | |
3781 | name = "shared"; | |
3782 | need_implicitly_determined = true; | |
3783 | break; | |
3784 | case OMP_CLAUSE_PRIVATE: | |
3785 | name = "private"; | |
3786 | need_complete_non_reference = true; | |
3787 | need_default_ctor = true; | |
3788 | need_implicitly_determined = true; | |
3789 | break; | |
3790 | case OMP_CLAUSE_FIRSTPRIVATE: | |
3791 | name = "firstprivate"; | |
3792 | need_complete_non_reference = true; | |
3793 | need_copy_ctor = true; | |
3794 | need_implicitly_determined = true; | |
3795 | break; | |
3796 | case OMP_CLAUSE_LASTPRIVATE: | |
3797 | name = "lastprivate"; | |
3798 | need_complete_non_reference = true; | |
3799 | need_copy_assignment = true; | |
3800 | need_implicitly_determined = true; | |
3801 | break; | |
3802 | case OMP_CLAUSE_REDUCTION: | |
3803 | name = "reduction"; | |
3804 | need_implicitly_determined = true; | |
3805 | break; | |
3806 | case OMP_CLAUSE_COPYPRIVATE: | |
3807 | name = "copyprivate"; | |
3808 | need_copy_assignment = true; | |
3809 | break; | |
3810 | case OMP_CLAUSE_COPYIN: | |
3811 | name = "copyin"; | |
3812 | need_copy_assignment = true; | |
3813 | break; | |
3814 | default: | |
3815 | pc = &OMP_CLAUSE_CHAIN (c); | |
3816 | continue; | |
3817 | } | |
3818 | ||
3819 | t = OMP_CLAUSE_DECL (c); | |
3820 | if (processing_template_decl | |
3821 | && TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
3822 | { | |
3823 | pc = &OMP_CLAUSE_CHAIN (c); | |
3824 | continue; | |
3825 | } | |
3826 | ||
3827 | switch (c_kind) | |
3828 | { | |
3829 | case OMP_CLAUSE_LASTPRIVATE: | |
3830 | if (!bitmap_bit_p (&firstprivate_head, DECL_UID (t))) | |
3831 | need_default_ctor = true; | |
3832 | break; | |
3833 | ||
3834 | case OMP_CLAUSE_REDUCTION: | |
3835 | if (AGGREGATE_TYPE_P (TREE_TYPE (t)) | |
3836 | || POINTER_TYPE_P (TREE_TYPE (t))) | |
3837 | { | |
3838 | error ("%qE has invalid type for %<reduction%>", t); | |
3839 | remove = true; | |
3840 | } | |
3841 | else if (FLOAT_TYPE_P (TREE_TYPE (t))) | |
3842 | { | |
3843 | enum tree_code r_code = OMP_CLAUSE_REDUCTION_CODE (c); | |
3844 | switch (r_code) | |
3845 | { | |
3846 | case PLUS_EXPR: | |
3847 | case MULT_EXPR: | |
3848 | case MINUS_EXPR: | |
3849 | break; | |
3850 | default: | |
3851 | error ("%qE has invalid type for %<reduction(%s)%>", | |
3852 | t, operator_name_info[r_code].name); | |
3853 | remove = true; | |
3854 | } | |
3855 | } | |
3856 | break; | |
3857 | ||
3858 | case OMP_CLAUSE_COPYIN: | |
3859 | if (TREE_CODE (t) != VAR_DECL || !DECL_THREAD_LOCAL_P (t)) | |
3860 | { | |
3861 | error ("%qE must be %<threadprivate%> for %<copyin%>", t); | |
3862 | remove = true; | |
3863 | } | |
3864 | break; | |
3865 | ||
3866 | default: | |
3867 | break; | |
3868 | } | |
3869 | ||
3870 | if (need_complete_non_reference) | |
3871 | { | |
3872 | t = require_complete_type (t); | |
3873 | if (t == error_mark_node) | |
3874 | remove = true; | |
3875 | else if (TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE) | |
3876 | { | |
3877 | error ("%qE has reference type for %qs", t, name); | |
3878 | remove = true; | |
3879 | } | |
3880 | } | |
3881 | if (need_implicitly_determined) | |
3882 | { | |
3883 | const char *share_name = NULL; | |
3884 | ||
3885 | if (TREE_CODE (t) == VAR_DECL && DECL_THREAD_LOCAL_P (t)) | |
3886 | share_name = "threadprivate"; | |
3887 | else switch (cxx_omp_predetermined_sharing (t)) | |
3888 | { | |
3889 | case OMP_CLAUSE_DEFAULT_UNSPECIFIED: | |
3890 | break; | |
3891 | case OMP_CLAUSE_DEFAULT_SHARED: | |
3892 | share_name = "shared"; | |
3893 | break; | |
3894 | case OMP_CLAUSE_DEFAULT_PRIVATE: | |
3895 | share_name = "private"; | |
3896 | break; | |
3897 | default: | |
3898 | gcc_unreachable (); | |
3899 | } | |
3900 | if (share_name) | |
3901 | { | |
3902 | error ("%qE is predetermined %qs for %qs", | |
3903 | t, share_name, name); | |
3904 | remove = true; | |
3905 | } | |
3906 | } | |
3907 | ||
3908 | /* We're interested in the base element, not arrays. */ | |
3909 | inner_type = type = TREE_TYPE (t); | |
3910 | while (TREE_CODE (inner_type) == ARRAY_TYPE) | |
3911 | inner_type = TREE_TYPE (inner_type); | |
3912 | ||
84dc00e8 | 3913 | /* Check for special function availability by building a call to one. |
1799e5d5 RH |
3914 | Save the results, because later we won't be in the right context |
3915 | for making these queries. */ | |
3916 | if (CLASS_TYPE_P (inner_type) | |
6f719560 | 3917 | && (need_default_ctor || need_copy_ctor || need_copy_assignment) |
a68ab351 JJ |
3918 | && !type_dependent_expression_p (t) |
3919 | && cxx_omp_create_clause_info (c, inner_type, need_default_ctor, | |
3920 | need_copy_ctor, need_copy_assignment)) | |
3921 | remove = true; | |
1799e5d5 RH |
3922 | |
3923 | if (remove) | |
3924 | *pc = OMP_CLAUSE_CHAIN (c); | |
3925 | else | |
3926 | pc = &OMP_CLAUSE_CHAIN (c); | |
3927 | } | |
3928 | ||
3929 | bitmap_obstack_release (NULL); | |
3930 | return clauses; | |
3931 | } | |
3932 | ||
3933 | /* For all variables in the tree_list VARS, mark them as thread local. */ | |
3934 | ||
3935 | void | |
3936 | finish_omp_threadprivate (tree vars) | |
3937 | { | |
3938 | tree t; | |
3939 | ||
3940 | /* Mark every variable in VARS to be assigned thread local storage. */ | |
3941 | for (t = vars; t; t = TREE_CHAIN (t)) | |
3942 | { | |
3943 | tree v = TREE_PURPOSE (t); | |
3944 | ||
edb6000e JJ |
3945 | if (error_operand_p (v)) |
3946 | ; | |
3947 | else if (TREE_CODE (v) != VAR_DECL) | |
3948 | error ("%<threadprivate%> %qD is not file, namespace " | |
3949 | "or block scope variable", v); | |
1799e5d5 RH |
3950 | /* If V had already been marked threadprivate, it doesn't matter |
3951 | whether it had been used prior to this point. */ | |
edb6000e | 3952 | else if (TREE_USED (v) |
1799e5d5 RH |
3953 | && (DECL_LANG_SPECIFIC (v) == NULL |
3954 | || !CP_DECL_THREADPRIVATE_P (v))) | |
3955 | error ("%qE declared %<threadprivate%> after first use", v); | |
3956 | else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v)) | |
3957 | error ("automatic variable %qE cannot be %<threadprivate%>", v); | |
3958 | else if (! COMPLETE_TYPE_P (TREE_TYPE (v))) | |
3959 | error ("%<threadprivate%> %qE has incomplete type", v); | |
a68ab351 JJ |
3960 | else if (TREE_STATIC (v) && TYPE_P (CP_DECL_CONTEXT (v)) |
3961 | && CP_DECL_CONTEXT (v) != current_class_type) | |
3962 | error ("%<threadprivate%> %qE directive not " | |
3963 | "in %qT definition", v, CP_DECL_CONTEXT (v)); | |
1799e5d5 RH |
3964 | else |
3965 | { | |
3966 | /* Allocate a LANG_SPECIFIC structure for V, if needed. */ | |
3967 | if (DECL_LANG_SPECIFIC (v) == NULL) | |
3968 | { | |
3969 | retrofit_lang_decl (v); | |
3970 | ||
3971 | /* Make sure that DECL_DISCRIMINATOR_P continues to be true | |
3972 | after the allocation of the lang_decl structure. */ | |
3973 | if (DECL_DISCRIMINATOR_P (v)) | |
b97e8a14 | 3974 | DECL_LANG_SPECIFIC (v)->u.base.u2sel = 1; |
1799e5d5 RH |
3975 | } |
3976 | ||
3977 | if (! DECL_THREAD_LOCAL_P (v)) | |
3978 | { | |
3979 | DECL_TLS_MODEL (v) = decl_default_tls_model (v); | |
3980 | /* If rtl has been already set for this var, call | |
3981 | make_decl_rtl once again, so that encode_section_info | |
3982 | has a chance to look at the new decl flags. */ | |
3983 | if (DECL_RTL_SET_P (v)) | |
3984 | make_decl_rtl (v); | |
3985 | } | |
3986 | CP_DECL_THREADPRIVATE_P (v) = 1; | |
3987 | } | |
3988 | } | |
3989 | } | |
3990 | ||
3991 | /* Build an OpenMP structured block. */ | |
3992 | ||
3993 | tree | |
3994 | begin_omp_structured_block (void) | |
3995 | { | |
3996 | return do_pushlevel (sk_omp); | |
3997 | } | |
3998 | ||
3999 | tree | |
4000 | finish_omp_structured_block (tree block) | |
4001 | { | |
4002 | return do_poplevel (block); | |
4003 | } | |
4004 | ||
84dc00e8 | 4005 | /* Similarly, except force the retention of the BLOCK. */ |
1799e5d5 RH |
4006 | |
4007 | tree | |
4008 | begin_omp_parallel (void) | |
4009 | { | |
4010 | keep_next_level (true); | |
4011 | return begin_omp_structured_block (); | |
4012 | } | |
4013 | ||
4014 | tree | |
4015 | finish_omp_parallel (tree clauses, tree body) | |
4016 | { | |
4017 | tree stmt; | |
4018 | ||
4019 | body = finish_omp_structured_block (body); | |
b850de4f | 4020 | |
1799e5d5 RH |
4021 | stmt = make_node (OMP_PARALLEL); |
4022 | TREE_TYPE (stmt) = void_type_node; | |
4023 | OMP_PARALLEL_CLAUSES (stmt) = clauses; | |
4024 | OMP_PARALLEL_BODY (stmt) = body; | |
54f7877c | 4025 | |
1799e5d5 RH |
4026 | return add_stmt (stmt); |
4027 | } | |
4028 | ||
a68ab351 JJ |
4029 | tree |
4030 | begin_omp_task (void) | |
4031 | { | |
4032 | keep_next_level (true); | |
4033 | return begin_omp_structured_block (); | |
4034 | } | |
4035 | ||
4036 | tree | |
4037 | finish_omp_task (tree clauses, tree body) | |
4038 | { | |
4039 | tree stmt; | |
4040 | ||
4041 | body = finish_omp_structured_block (body); | |
4042 | ||
4043 | stmt = make_node (OMP_TASK); | |
4044 | TREE_TYPE (stmt) = void_type_node; | |
4045 | OMP_TASK_CLAUSES (stmt) = clauses; | |
4046 | OMP_TASK_BODY (stmt) = body; | |
4047 | ||
4048 | return add_stmt (stmt); | |
4049 | } | |
4050 | ||
4051 | /* Helper function for finish_omp_for. Convert Ith random access iterator | |
4052 | into integral iterator. Return FALSE if successful. */ | |
4053 | ||
4054 | static bool | |
4055 | handle_omp_for_class_iterator (int i, location_t locus, tree declv, tree initv, | |
4056 | tree condv, tree incrv, tree *body, | |
4057 | tree *pre_body, tree clauses) | |
4058 | { | |
4059 | tree diff, iter_init, iter_incr = NULL, last; | |
4060 | tree incr_var = NULL, orig_pre_body, orig_body, c; | |
4061 | tree decl = TREE_VEC_ELT (declv, i); | |
4062 | tree init = TREE_VEC_ELT (initv, i); | |
4063 | tree cond = TREE_VEC_ELT (condv, i); | |
4064 | tree incr = TREE_VEC_ELT (incrv, i); | |
4065 | tree iter = decl; | |
4066 | location_t elocus = locus; | |
4067 | ||
4068 | if (init && EXPR_HAS_LOCATION (init)) | |
4069 | elocus = EXPR_LOCATION (init); | |
4070 | ||
4071 | switch (TREE_CODE (cond)) | |
4072 | { | |
4073 | case GT_EXPR: | |
4074 | case GE_EXPR: | |
4075 | case LT_EXPR: | |
4076 | case LE_EXPR: | |
c5cdb03f JJ |
4077 | if (TREE_OPERAND (cond, 1) == iter) |
4078 | cond = build2 (swap_tree_comparison (TREE_CODE (cond)), | |
4079 | TREE_TYPE (cond), iter, TREE_OPERAND (cond, 0)); | |
a68ab351 JJ |
4080 | if (TREE_OPERAND (cond, 0) != iter) |
4081 | cond = error_mark_node; | |
4082 | else | |
4083 | { | |
4084 | tree tem = build_x_binary_op (TREE_CODE (cond), iter, ERROR_MARK, | |
4085 | TREE_OPERAND (cond, 1), ERROR_MARK, | |
4086 | NULL, tf_warning_or_error); | |
4087 | if (error_operand_p (tem)) | |
4088 | return true; | |
4089 | } | |
4090 | break; | |
4091 | default: | |
4092 | cond = error_mark_node; | |
4093 | break; | |
4094 | } | |
4095 | if (cond == error_mark_node) | |
4096 | { | |
69bc6bff | 4097 | error_at (elocus, "invalid controlling predicate"); |
a68ab351 JJ |
4098 | return true; |
4099 | } | |
4100 | diff = build_x_binary_op (MINUS_EXPR, TREE_OPERAND (cond, 1), | |
4101 | ERROR_MARK, iter, ERROR_MARK, NULL, | |
4102 | tf_warning_or_error); | |
4103 | if (error_operand_p (diff)) | |
4104 | return true; | |
4105 | if (TREE_CODE (TREE_TYPE (diff)) != INTEGER_TYPE) | |
4106 | { | |
69bc6bff MLI |
4107 | error_at (elocus, "difference between %qE and %qD does not have integer type", |
4108 | TREE_OPERAND (cond, 1), iter); | |
a68ab351 JJ |
4109 | return true; |
4110 | } | |
4111 | ||
4112 | switch (TREE_CODE (incr)) | |
4113 | { | |
4114 | case PREINCREMENT_EXPR: | |
4115 | case PREDECREMENT_EXPR: | |
4116 | case POSTINCREMENT_EXPR: | |
4117 | case POSTDECREMENT_EXPR: | |
4118 | if (TREE_OPERAND (incr, 0) != iter) | |
4119 | { | |
4120 | incr = error_mark_node; | |
4121 | break; | |
4122 | } | |
4123 | iter_incr = build_x_unary_op (TREE_CODE (incr), iter, | |
4124 | tf_warning_or_error); | |
4125 | if (error_operand_p (iter_incr)) | |
4126 | return true; | |
4127 | else if (TREE_CODE (incr) == PREINCREMENT_EXPR | |
4128 | || TREE_CODE (incr) == POSTINCREMENT_EXPR) | |
4129 | incr = integer_one_node; | |
4130 | else | |
4131 | incr = integer_minus_one_node; | |
4132 | break; | |
4133 | case MODIFY_EXPR: | |
4134 | if (TREE_OPERAND (incr, 0) != iter) | |
4135 | incr = error_mark_node; | |
4136 | else if (TREE_CODE (TREE_OPERAND (incr, 1)) == PLUS_EXPR | |
4137 | || TREE_CODE (TREE_OPERAND (incr, 1)) == MINUS_EXPR) | |
4138 | { | |
4139 | tree rhs = TREE_OPERAND (incr, 1); | |
4140 | if (TREE_OPERAND (rhs, 0) == iter) | |
4141 | { | |
4142 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (rhs, 1))) | |
4143 | != INTEGER_TYPE) | |
4144 | incr = error_mark_node; | |
4145 | else | |
4146 | { | |
4147 | iter_incr = build_x_modify_expr (iter, TREE_CODE (rhs), | |
4148 | TREE_OPERAND (rhs, 1), | |
4149 | tf_warning_or_error); | |
4150 | if (error_operand_p (iter_incr)) | |
4151 | return true; | |
4152 | incr = TREE_OPERAND (rhs, 1); | |
4153 | incr = cp_convert (TREE_TYPE (diff), incr); | |
4154 | if (TREE_CODE (rhs) == MINUS_EXPR) | |
4155 | { | |
4156 | incr = build1 (NEGATE_EXPR, TREE_TYPE (diff), incr); | |
4157 | incr = fold_if_not_in_template (incr); | |
4158 | } | |
4159 | if (TREE_CODE (incr) != INTEGER_CST | |
4160 | && (TREE_CODE (incr) != NOP_EXPR | |
4161 | || (TREE_CODE (TREE_OPERAND (incr, 0)) | |
4162 | != INTEGER_CST))) | |
4163 | iter_incr = NULL; | |
4164 | } | |
4165 | } | |
4166 | else if (TREE_OPERAND (rhs, 1) == iter) | |
4167 | { | |
4168 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (rhs, 0))) != INTEGER_TYPE | |
4169 | || TREE_CODE (rhs) != PLUS_EXPR) | |
4170 | incr = error_mark_node; | |
4171 | else | |
4172 | { | |
4173 | iter_incr = build_x_binary_op (PLUS_EXPR, | |
4174 | TREE_OPERAND (rhs, 0), | |
4175 | ERROR_MARK, iter, | |
4176 | ERROR_MARK, NULL, | |
4177 | tf_warning_or_error); | |
4178 | if (error_operand_p (iter_incr)) | |
4179 | return true; | |
4180 | iter_incr = build_x_modify_expr (iter, NOP_EXPR, | |
4181 | iter_incr, | |
4182 | tf_warning_or_error); | |
4183 | if (error_operand_p (iter_incr)) | |
4184 | return true; | |
4185 | incr = TREE_OPERAND (rhs, 0); | |
4186 | iter_incr = NULL; | |
4187 | } | |
4188 | } | |
4189 | else | |
4190 | incr = error_mark_node; | |
4191 | } | |
4192 | else | |
4193 | incr = error_mark_node; | |
4194 | break; | |
4195 | default: | |
4196 | incr = error_mark_node; | |
4197 | break; | |
4198 | } | |
4199 | ||
4200 | if (incr == error_mark_node) | |
4201 | { | |
69bc6bff | 4202 | error_at (elocus, "invalid increment expression"); |
a68ab351 JJ |
4203 | return true; |
4204 | } | |
4205 | ||
4206 | incr = cp_convert (TREE_TYPE (diff), incr); | |
4207 | for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c)) | |
4208 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE | |
4209 | && OMP_CLAUSE_DECL (c) == iter) | |
4210 | break; | |
4211 | ||
4212 | decl = create_temporary_var (TREE_TYPE (diff)); | |
4213 | pushdecl (decl); | |
4214 | add_decl_expr (decl); | |
4215 | last = create_temporary_var (TREE_TYPE (diff)); | |
4216 | pushdecl (last); | |
4217 | add_decl_expr (last); | |
4218 | if (c && iter_incr == NULL) | |
4219 | { | |
4220 | incr_var = create_temporary_var (TREE_TYPE (diff)); | |
4221 | pushdecl (incr_var); | |
4222 | add_decl_expr (incr_var); | |
4223 | } | |
4224 | gcc_assert (stmts_are_full_exprs_p ()); | |
4225 | ||
4226 | orig_pre_body = *pre_body; | |
4227 | *pre_body = push_stmt_list (); | |
4228 | if (orig_pre_body) | |
4229 | add_stmt (orig_pre_body); | |
4230 | if (init != NULL) | |
4231 | finish_expr_stmt (build_x_modify_expr (iter, NOP_EXPR, init, | |
4232 | tf_warning_or_error)); | |
4233 | init = build_int_cst (TREE_TYPE (diff), 0); | |
4234 | if (c && iter_incr == NULL) | |
4235 | { | |
4236 | finish_expr_stmt (build_x_modify_expr (incr_var, NOP_EXPR, | |
4237 | incr, tf_warning_or_error)); | |
4238 | incr = incr_var; | |
4239 | iter_incr = build_x_modify_expr (iter, PLUS_EXPR, incr, | |
4240 | tf_warning_or_error); | |
4241 | } | |
4242 | finish_expr_stmt (build_x_modify_expr (last, NOP_EXPR, init, | |
4243 | tf_warning_or_error)); | |
4244 | *pre_body = pop_stmt_list (*pre_body); | |
4245 | ||
ba47d38d AH |
4246 | cond = cp_build_binary_op (elocus, |
4247 | TREE_CODE (cond), decl, diff, | |
a68ab351 | 4248 | tf_warning_or_error); |
32e8bb8e | 4249 | incr = build_modify_expr (elocus, decl, NULL_TREE, PLUS_EXPR, |
c2255bc4 | 4250 | elocus, incr, NULL_TREE); |
a68ab351 JJ |
4251 | |
4252 | orig_body = *body; | |
4253 | *body = push_stmt_list (); | |
4254 | iter_init = build2 (MINUS_EXPR, TREE_TYPE (diff), decl, last); | |
4255 | iter_init = build_x_modify_expr (iter, PLUS_EXPR, iter_init, | |
4256 | tf_warning_or_error); | |
4257 | iter_init = build1 (NOP_EXPR, void_type_node, iter_init); | |
4258 | finish_expr_stmt (iter_init); | |
4259 | finish_expr_stmt (build_x_modify_expr (last, NOP_EXPR, decl, | |
4260 | tf_warning_or_error)); | |
4261 | add_stmt (orig_body); | |
4262 | *body = pop_stmt_list (*body); | |
4263 | ||
4264 | if (c) | |
4265 | { | |
4266 | OMP_CLAUSE_LASTPRIVATE_STMT (c) = push_stmt_list (); | |
4267 | finish_expr_stmt (iter_incr); | |
4268 | OMP_CLAUSE_LASTPRIVATE_STMT (c) | |
4269 | = pop_stmt_list (OMP_CLAUSE_LASTPRIVATE_STMT (c)); | |
4270 | } | |
4271 | ||
4272 | TREE_VEC_ELT (declv, i) = decl; | |
4273 | TREE_VEC_ELT (initv, i) = init; | |
4274 | TREE_VEC_ELT (condv, i) = cond; | |
4275 | TREE_VEC_ELT (incrv, i) = incr; | |
4276 | ||
4277 | return false; | |
4278 | } | |
4279 | ||
1799e5d5 RH |
4280 | /* Build and validate an OMP_FOR statement. CLAUSES, BODY, COND, INCR |
4281 | are directly for their associated operands in the statement. DECL | |
4282 | and INIT are a combo; if DECL is NULL then INIT ought to be a | |
4283 | MODIFY_EXPR, and the DECL should be extracted. PRE_BODY are | |
4284 | optional statements that need to go before the loop into its | |
4285 | sk_omp scope. */ | |
4286 | ||
4287 | tree | |
a68ab351 JJ |
4288 | finish_omp_for (location_t locus, tree declv, tree initv, tree condv, |
4289 | tree incrv, tree body, tree pre_body, tree clauses) | |
4290 | { | |
4291 | tree omp_for = NULL, orig_incr = NULL; | |
4292 | tree decl, init, cond, incr; | |
4293 | location_t elocus; | |
4294 | int i; | |
4295 | ||
4296 | gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (initv)); | |
4297 | gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (condv)); | |
4298 | gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (incrv)); | |
4299 | for (i = 0; i < TREE_VEC_LENGTH (declv); i++) | |
4300 | { | |
4301 | decl = TREE_VEC_ELT (declv, i); | |
4302 | init = TREE_VEC_ELT (initv, i); | |
4303 | cond = TREE_VEC_ELT (condv, i); | |
4304 | incr = TREE_VEC_ELT (incrv, i); | |
4305 | elocus = locus; | |
4306 | ||
4307 | if (decl == NULL) | |
4308 | { | |
4309 | if (init != NULL) | |
4310 | switch (TREE_CODE (init)) | |
1799e5d5 | 4311 | { |
a68ab351 | 4312 | case MODIFY_EXPR: |
1799e5d5 | 4313 | decl = TREE_OPERAND (init, 0); |
a68ab351 JJ |
4314 | init = TREE_OPERAND (init, 1); |
4315 | break; | |
4316 | case MODOP_EXPR: | |
4317 | if (TREE_CODE (TREE_OPERAND (init, 1)) == NOP_EXPR) | |
4318 | { | |
4319 | decl = TREE_OPERAND (init, 0); | |
4320 | init = TREE_OPERAND (init, 2); | |
4321 | } | |
4322 | break; | |
4323 | default: | |
4324 | break; | |
1799e5d5 | 4325 | } |
1799e5d5 | 4326 | |
a68ab351 JJ |
4327 | if (decl == NULL) |
4328 | { | |
69bc6bff MLI |
4329 | error_at (locus, |
4330 | "expected iteration declaration or initialization"); | |
a68ab351 JJ |
4331 | return NULL; |
4332 | } | |
1799e5d5 | 4333 | } |
1799e5d5 | 4334 | |
a68ab351 JJ |
4335 | if (init && EXPR_HAS_LOCATION (init)) |
4336 | elocus = EXPR_LOCATION (init); | |
1799e5d5 RH |
4337 | |
4338 | if (cond == NULL) | |
4339 | { | |
69bc6bff | 4340 | error_at (elocus, "missing controlling predicate"); |
1799e5d5 RH |
4341 | return NULL; |
4342 | } | |
4343 | ||
4344 | if (incr == NULL) | |
4345 | { | |
69bc6bff | 4346 | error_at (elocus, "missing increment expression"); |
1799e5d5 RH |
4347 | return NULL; |
4348 | } | |
4349 | ||
a68ab351 JJ |
4350 | TREE_VEC_ELT (declv, i) = decl; |
4351 | TREE_VEC_ELT (initv, i) = init; | |
4352 | } | |
4353 | ||
4354 | if (dependent_omp_for_p (declv, initv, condv, incrv)) | |
4355 | { | |
4356 | tree stmt; | |
4357 | ||
1799e5d5 RH |
4358 | stmt = make_node (OMP_FOR); |
4359 | ||
a68ab351 JJ |
4360 | for (i = 0; i < TREE_VEC_LENGTH (declv); i++) |
4361 | { | |
4362 | /* This is really just a place-holder. We'll be decomposing this | |
4363 | again and going through the cp_build_modify_expr path below when | |
4364 | we instantiate the thing. */ | |
4365 | TREE_VEC_ELT (initv, i) | |
4366 | = build2 (MODIFY_EXPR, void_type_node, TREE_VEC_ELT (declv, i), | |
4367 | TREE_VEC_ELT (initv, i)); | |
4368 | } | |
1799e5d5 RH |
4369 | |
4370 | TREE_TYPE (stmt) = void_type_node; | |
a68ab351 JJ |
4371 | OMP_FOR_INIT (stmt) = initv; |
4372 | OMP_FOR_COND (stmt) = condv; | |
4373 | OMP_FOR_INCR (stmt) = incrv; | |
1799e5d5 RH |
4374 | OMP_FOR_BODY (stmt) = body; |
4375 | OMP_FOR_PRE_BODY (stmt) = pre_body; | |
a68ab351 | 4376 | OMP_FOR_CLAUSES (stmt) = clauses; |
1799e5d5 RH |
4377 | |
4378 | SET_EXPR_LOCATION (stmt, locus); | |
4379 | return add_stmt (stmt); | |
4380 | } | |
4381 | ||
a68ab351 JJ |
4382 | if (processing_template_decl) |
4383 | orig_incr = make_tree_vec (TREE_VEC_LENGTH (incrv)); | |
1799e5d5 | 4384 | |
a68ab351 | 4385 | for (i = 0; i < TREE_VEC_LENGTH (declv); ) |
dadb19e0 | 4386 | { |
a68ab351 JJ |
4387 | decl = TREE_VEC_ELT (declv, i); |
4388 | init = TREE_VEC_ELT (initv, i); | |
4389 | cond = TREE_VEC_ELT (condv, i); | |
4390 | incr = TREE_VEC_ELT (incrv, i); | |
4391 | if (orig_incr) | |
4392 | TREE_VEC_ELT (orig_incr, i) = incr; | |
4393 | elocus = locus; | |
4394 | ||
4395 | if (init && EXPR_HAS_LOCATION (init)) | |
dadb19e0 | 4396 | elocus = EXPR_LOCATION (init); |
dadb19e0 | 4397 | |
a68ab351 JJ |
4398 | if (!DECL_P (decl)) |
4399 | { | |
69bc6bff | 4400 | error_at (elocus, "expected iteration declaration or initialization"); |
a68ab351 JJ |
4401 | return NULL; |
4402 | } | |
969c111d | 4403 | |
a68ab351 JJ |
4404 | if (incr && TREE_CODE (incr) == MODOP_EXPR) |
4405 | { | |
4406 | if (orig_incr) | |
4407 | TREE_VEC_ELT (orig_incr, i) = incr; | |
4408 | incr = cp_build_modify_expr (TREE_OPERAND (incr, 0), | |
4409 | TREE_CODE (TREE_OPERAND (incr, 1)), | |
4410 | TREE_OPERAND (incr, 2), | |
4411 | tf_warning_or_error); | |
4412 | } | |
4413 | ||
4414 | if (CLASS_TYPE_P (TREE_TYPE (decl))) | |
4415 | { | |
4416 | if (handle_omp_for_class_iterator (i, locus, declv, initv, condv, | |
4417 | incrv, &body, &pre_body, clauses)) | |
4418 | return NULL; | |
4419 | continue; | |
4420 | } | |
4421 | ||
4422 | if (!INTEGRAL_TYPE_P (TREE_TYPE (decl)) | |
4423 | && TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE) | |
4424 | { | |
69bc6bff | 4425 | error_at (elocus, "invalid type for iteration variable %qE", decl); |
a68ab351 JJ |
4426 | return NULL; |
4427 | } | |
969c111d | 4428 | |
b2ebd268 | 4429 | if (!processing_template_decl) |
8569b2d0 JJ |
4430 | { |
4431 | init = fold_build_cleanup_point_expr (TREE_TYPE (init), init); | |
4432 | init = cp_build_modify_expr (decl, NOP_EXPR, init, tf_warning_or_error); | |
4433 | } | |
4434 | else | |
4435 | init = build2 (MODIFY_EXPR, void_type_node, decl, init); | |
e4ebaef3 JJ |
4436 | if (cond |
4437 | && TREE_SIDE_EFFECTS (cond) | |
4438 | && COMPARISON_CLASS_P (cond) | |
4439 | && !processing_template_decl) | |
a68ab351 | 4440 | { |
e4ebaef3 JJ |
4441 | tree t = TREE_OPERAND (cond, 0); |
4442 | if (TREE_SIDE_EFFECTS (t) | |
4443 | && t != decl | |
4444 | && (TREE_CODE (t) != NOP_EXPR | |
4445 | || TREE_OPERAND (t, 0) != decl)) | |
4446 | TREE_OPERAND (cond, 0) | |
4447 | = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
a68ab351 | 4448 | |
e4ebaef3 JJ |
4449 | t = TREE_OPERAND (cond, 1); |
4450 | if (TREE_SIDE_EFFECTS (t) | |
4451 | && t != decl | |
4452 | && (TREE_CODE (t) != NOP_EXPR | |
4453 | || TREE_OPERAND (t, 0) != decl)) | |
4454 | TREE_OPERAND (cond, 1) | |
a68ab351 JJ |
4455 | = fold_build_cleanup_point_expr (TREE_TYPE (t), t); |
4456 | } | |
4457 | if (decl == error_mark_node || init == error_mark_node) | |
4458 | return NULL; | |
4459 | ||
4460 | TREE_VEC_ELT (declv, i) = decl; | |
4461 | TREE_VEC_ELT (initv, i) = init; | |
4462 | TREE_VEC_ELT (condv, i) = cond; | |
4463 | TREE_VEC_ELT (incrv, i) = incr; | |
4464 | i++; | |
969c111d | 4465 | } |
a68ab351 JJ |
4466 | |
4467 | if (IS_EMPTY_STMT (pre_body)) | |
4468 | pre_body = NULL; | |
4469 | ||
4470 | omp_for = c_finish_omp_for (locus, declv, initv, condv, incrv, | |
4471 | body, pre_body); | |
4472 | ||
4473 | if (omp_for == NULL) | |
4474 | return NULL; | |
4475 | ||
4476 | for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INCR (omp_for)); i++) | |
969c111d | 4477 | { |
e4ebaef3 JJ |
4478 | decl = TREE_OPERAND (TREE_VEC_ELT (OMP_FOR_INIT (omp_for), i), 0); |
4479 | incr = TREE_VEC_ELT (OMP_FOR_INCR (omp_for), i); | |
969c111d | 4480 | |
a68ab351 JJ |
4481 | if (TREE_CODE (incr) != MODIFY_EXPR) |
4482 | continue; | |
4483 | ||
4484 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (incr, 1)) | |
e4ebaef3 JJ |
4485 | && BINARY_CLASS_P (TREE_OPERAND (incr, 1)) |
4486 | && !processing_template_decl) | |
a68ab351 | 4487 | { |
e4ebaef3 JJ |
4488 | tree t = TREE_OPERAND (TREE_OPERAND (incr, 1), 0); |
4489 | if (TREE_SIDE_EFFECTS (t) | |
4490 | && t != decl | |
4491 | && (TREE_CODE (t) != NOP_EXPR | |
4492 | || TREE_OPERAND (t, 0) != decl)) | |
4493 | TREE_OPERAND (TREE_OPERAND (incr, 1), 0) | |
4494 | = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
a68ab351 | 4495 | |
e4ebaef3 JJ |
4496 | t = TREE_OPERAND (TREE_OPERAND (incr, 1), 1); |
4497 | if (TREE_SIDE_EFFECTS (t) | |
4498 | && t != decl | |
4499 | && (TREE_CODE (t) != NOP_EXPR | |
4500 | || TREE_OPERAND (t, 0) != decl)) | |
4501 | TREE_OPERAND (TREE_OPERAND (incr, 1), 1) | |
4502 | = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
a68ab351 JJ |
4503 | } |
4504 | ||
4505 | if (orig_incr) | |
4506 | TREE_VEC_ELT (OMP_FOR_INCR (omp_for), i) = TREE_VEC_ELT (orig_incr, i); | |
969c111d | 4507 | } |
a68ab351 JJ |
4508 | if (omp_for != NULL) |
4509 | OMP_FOR_CLAUSES (omp_for) = clauses; | |
969c111d | 4510 | return omp_for; |
1799e5d5 RH |
4511 | } |
4512 | ||
4513 | void | |
4514 | finish_omp_atomic (enum tree_code code, tree lhs, tree rhs) | |
4515 | { | |
239371f9 JJ |
4516 | tree orig_lhs; |
4517 | tree orig_rhs; | |
4518 | bool dependent_p; | |
e6bd5565 MM |
4519 | tree stmt; |
4520 | ||
239371f9 JJ |
4521 | orig_lhs = lhs; |
4522 | orig_rhs = rhs; | |
4523 | dependent_p = false; | |
4524 | stmt = NULL_TREE; | |
4525 | ||
4526 | /* Even in a template, we can detect invalid uses of the atomic | |
4527 | pragma if neither LHS nor RHS is type-dependent. */ | |
4528 | if (processing_template_decl) | |
e6bd5565 | 4529 | { |
239371f9 JJ |
4530 | dependent_p = (type_dependent_expression_p (lhs) |
4531 | || type_dependent_expression_p (rhs)); | |
4532 | if (!dependent_p) | |
e6bd5565 MM |
4533 | { |
4534 | lhs = build_non_dependent_expr (lhs); | |
4535 | rhs = build_non_dependent_expr (rhs); | |
4536 | } | |
239371f9 JJ |
4537 | } |
4538 | if (!dependent_p) | |
4539 | { | |
c2255bc4 | 4540 | stmt = c_finish_omp_atomic (input_location, code, lhs, rhs); |
239371f9 JJ |
4541 | if (stmt == error_mark_node) |
4542 | return; | |
e6bd5565 | 4543 | } |
239371f9 JJ |
4544 | if (processing_template_decl) |
4545 | stmt = build2 (OMP_ATOMIC, void_type_node, integer_zero_node, | |
4546 | build2 (code, void_type_node, orig_lhs, orig_rhs)); | |
4547 | add_stmt (stmt); | |
1799e5d5 RH |
4548 | } |
4549 | ||
4550 | void | |
4551 | finish_omp_barrier (void) | |
4552 | { | |
4553 | tree fn = built_in_decls[BUILT_IN_GOMP_BARRIER]; | |
c166b898 ILT |
4554 | VEC(tree,gc) *vec = make_tree_vector (); |
4555 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); | |
4556 | release_tree_vector (vec); | |
1799e5d5 RH |
4557 | finish_expr_stmt (stmt); |
4558 | } | |
4559 | ||
4560 | void | |
4561 | finish_omp_flush (void) | |
4562 | { | |
4563 | tree fn = built_in_decls[BUILT_IN_SYNCHRONIZE]; | |
c166b898 ILT |
4564 | VEC(tree,gc) *vec = make_tree_vector (); |
4565 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); | |
4566 | release_tree_vector (vec); | |
1799e5d5 RH |
4567 | finish_expr_stmt (stmt); |
4568 | } | |
4569 | ||
a68ab351 JJ |
4570 | void |
4571 | finish_omp_taskwait (void) | |
1799e5d5 | 4572 | { |
a68ab351 | 4573 | tree fn = built_in_decls[BUILT_IN_GOMP_TASKWAIT]; |
c166b898 ILT |
4574 | VEC(tree,gc) *vec = make_tree_vector (); |
4575 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); | |
4576 | release_tree_vector (vec); | |
a68ab351 | 4577 | finish_expr_stmt (stmt); |
1799e5d5 RH |
4578 | } |
4579 | \f | |
54f7877c | 4580 | void |
3a978d72 | 4581 | init_cp_semantics (void) |
54f7877c | 4582 | { |
54f7877c | 4583 | } |
55a3debe DG |
4584 | \f |
4585 | /* Build a STATIC_ASSERT for a static assertion with the condition | |
4586 | CONDITION and the message text MESSAGE. LOCATION is the location | |
4587 | of the static assertion in the source code. When MEMBER_P, this | |
4588 | static assertion is a member of a class. */ | |
4589 | void | |
4590 | finish_static_assert (tree condition, tree message, location_t location, | |
4591 | bool member_p) | |
4592 | { | |
7b3e2d46 DG |
4593 | if (check_for_bare_parameter_packs (condition)) |
4594 | condition = error_mark_node; | |
4595 | ||
55a3debe DG |
4596 | if (type_dependent_expression_p (condition) |
4597 | || value_dependent_expression_p (condition)) | |
4598 | { | |
4599 | /* We're in a template; build a STATIC_ASSERT and put it in | |
4600 | the right place. */ | |
4601 | tree assertion; | |
4602 | ||
4603 | assertion = make_node (STATIC_ASSERT); | |
4604 | STATIC_ASSERT_CONDITION (assertion) = condition; | |
4605 | STATIC_ASSERT_MESSAGE (assertion) = message; | |
4606 | STATIC_ASSERT_SOURCE_LOCATION (assertion) = location; | |
4607 | ||
4608 | if (member_p) | |
4609 | maybe_add_class_template_decl_list (current_class_type, | |
4610 | assertion, | |
4611 | /*friend_p=*/0); | |
4612 | else | |
4613 | add_stmt (assertion); | |
4614 | ||
4615 | return; | |
4616 | } | |
4617 | ||
4618 | /* Fold the expression and convert it to a boolean value. */ | |
4619 | condition = fold_non_dependent_expr (condition); | |
4620 | condition = cp_convert (boolean_type_node, condition); | |
4621 | ||
4622 | if (TREE_CODE (condition) == INTEGER_CST && !integer_zerop (condition)) | |
4623 | /* Do nothing; the condition is satisfied. */ | |
4624 | ; | |
4625 | else | |
4626 | { | |
4627 | location_t saved_loc = input_location; | |
4628 | ||
4629 | input_location = location; | |
4630 | if (TREE_CODE (condition) == INTEGER_CST | |
4631 | && integer_zerop (condition)) | |
4632 | /* Report the error. */ | |
4633 | error ("static assertion failed: %E", message); | |
4634 | else if (condition && condition != error_mark_node) | |
4635 | error ("non-constant condition for static assertion"); | |
4636 | input_location = saved_loc; | |
4637 | } | |
4638 | } | |
3ad6a8e1 | 4639 | \f |
4b4a42c4 JM |
4640 | /* Returns the type of EXPR for cases where we can determine it even though |
4641 | EXPR is a type-dependent expression. */ | |
a77f94e2 JM |
4642 | |
4643 | tree | |
4644 | describable_type (tree expr) | |
4645 | { | |
4646 | tree type = NULL_TREE; | |
4647 | ||
a77f94e2 JM |
4648 | if (! type_dependent_expression_p (expr) |
4649 | && ! type_unknown_p (expr)) | |
4650 | { | |
aef8bce8 | 4651 | type = unlowered_expr_type (expr); |
a77f94e2 JM |
4652 | if (real_lvalue_p (expr)) |
4653 | type = build_reference_type (type); | |
4654 | } | |
a77f94e2 JM |
4655 | |
4656 | if (type) | |
4657 | return type; | |
4658 | ||
4659 | switch (TREE_CODE (expr)) | |
4660 | { | |
4661 | case VAR_DECL: | |
4662 | case PARM_DECL: | |
4663 | case RESULT_DECL: | |
4664 | case FUNCTION_DECL: | |
4b4a42c4 | 4665 | return TREE_TYPE (expr); |
a77f94e2 JM |
4666 | break; |
4667 | ||
4668 | case NEW_EXPR: | |
4669 | case CONST_DECL: | |
4670 | case TEMPLATE_PARM_INDEX: | |
4671 | case CAST_EXPR: | |
4672 | case STATIC_CAST_EXPR: | |
4673 | case REINTERPRET_CAST_EXPR: | |
4674 | case CONST_CAST_EXPR: | |
4675 | case DYNAMIC_CAST_EXPR: | |
4676 | type = TREE_TYPE (expr); | |
4677 | break; | |
4678 | ||
4679 | case INDIRECT_REF: | |
4680 | { | |
4681 | tree ptrtype = describable_type (TREE_OPERAND (expr, 0)); | |
4682 | if (ptrtype && POINTER_TYPE_P (ptrtype)) | |
4683 | type = build_reference_type (TREE_TYPE (ptrtype)); | |
4684 | } | |
4685 | break; | |
4686 | ||
4687 | default: | |
4688 | if (TREE_CODE_CLASS (TREE_CODE (expr)) == tcc_constant) | |
4689 | type = TREE_TYPE (expr); | |
4690 | break; | |
4691 | } | |
4692 | ||
4693 | if (type && type_uses_auto (type)) | |
4694 | return NULL_TREE; | |
4695 | else | |
4696 | return type; | |
4697 | } | |
4698 | ||
3ad6a8e1 DG |
4699 | /* Implements the C++0x decltype keyword. Returns the type of EXPR, |
4700 | suitable for use as a type-specifier. | |
4701 | ||
4702 | ID_EXPRESSION_OR_MEMBER_ACCESS_P is true when EXPR was parsed as an | |
4703 | id-expression or a class member access, FALSE when it was parsed as | |
4704 | a full expression. */ | |
a77f94e2 | 4705 | |
3ad6a8e1 DG |
4706 | tree |
4707 | finish_decltype_type (tree expr, bool id_expression_or_member_access_p) | |
4708 | { | |
4709 | tree orig_expr = expr; | |
056dd1af | 4710 | tree type = NULL_TREE; |
3ad6a8e1 | 4711 | |
e4fd5b87 DG |
4712 | if (!expr || error_operand_p (expr)) |
4713 | return error_mark_node; | |
4714 | ||
7a547b93 JJ |
4715 | if (TYPE_P (expr) |
4716 | || TREE_CODE (expr) == TYPE_DECL | |
4717 | || (TREE_CODE (expr) == BIT_NOT_EXPR | |
4718 | && TYPE_P (TREE_OPERAND (expr, 0)))) | |
4719 | { | |
4720 | error ("argument to decltype must be an expression"); | |
4721 | return error_mark_node; | |
4722 | } | |
4723 | ||
21920fd1 JM |
4724 | if (type_dependent_expression_p (expr) |
4725 | /* In a template, a COMPONENT_REF has an IDENTIFIER_NODE for op1 even | |
4726 | if it isn't dependent, so that we can check access control at | |
4727 | instantiation time, so defer the decltype as well (PR 42277). */ | |
4728 | || (id_expression_or_member_access_p | |
4729 | && processing_template_decl | |
4730 | && TREE_CODE (expr) == COMPONENT_REF)) | |
3ad6a8e1 | 4731 | { |
a77f94e2 JM |
4732 | if (id_expression_or_member_access_p) |
4733 | { | |
4734 | switch (TREE_CODE (expr)) | |
4735 | { | |
4736 | case VAR_DECL: | |
4737 | case PARM_DECL: | |
4738 | case RESULT_DECL: | |
4739 | case FUNCTION_DECL: | |
4740 | case CONST_DECL: | |
4741 | case TEMPLATE_PARM_INDEX: | |
4742 | type = TREE_TYPE (expr); | |
4743 | break; | |
4744 | ||
4745 | default: | |
4746 | break; | |
4747 | } | |
4748 | } | |
a77f94e2 JM |
4749 | |
4750 | if (type && !type_uses_auto (type)) | |
4751 | return type; | |
4752 | ||
d1c05c88 | 4753 | treat_as_dependent: |
9e1e64ec | 4754 | type = cxx_make_type (DECLTYPE_TYPE); |
3ad6a8e1 DG |
4755 | DECLTYPE_TYPE_EXPR (type) = expr; |
4756 | DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P (type) | |
4757 | = id_expression_or_member_access_p; | |
4758 | SET_TYPE_STRUCTURAL_EQUALITY (type); | |
4759 | ||
4760 | return type; | |
4761 | } | |
4762 | ||
4763 | /* The type denoted by decltype(e) is defined as follows: */ | |
4764 | ||
ccb05613 | 4765 | expr = resolve_nondeduced_context (expr); |
48326487 JM |
4766 | |
4767 | /* To get the size of a static data member declared as an array of | |
4768 | unknown bound, we need to instantiate it. */ | |
4769 | if (TREE_CODE (expr) == VAR_DECL | |
4770 | && VAR_HAD_UNKNOWN_BOUND (expr) | |
4771 | && DECL_TEMPLATE_INSTANTIATION (expr)) | |
4772 | instantiate_decl (expr, /*defer_ok*/true, /*expl_inst_mem*/false); | |
4773 | ||
3ad6a8e1 DG |
4774 | if (id_expression_or_member_access_p) |
4775 | { | |
4776 | /* If e is an id-expression or a class member access (5.2.5 | |
4777 | [expr.ref]), decltype(e) is defined as the type of the entity | |
4778 | named by e. If there is no such entity, or e names a set of | |
4779 | overloaded functions, the program is ill-formed. */ | |
4780 | if (TREE_CODE (expr) == IDENTIFIER_NODE) | |
4781 | expr = lookup_name (expr); | |
4782 | ||
4783 | if (TREE_CODE (expr) == INDIRECT_REF) | |
4784 | /* This can happen when the expression is, e.g., "a.b". Just | |
4785 | look at the underlying operand. */ | |
4786 | expr = TREE_OPERAND (expr, 0); | |
4787 | ||
4788 | if (TREE_CODE (expr) == OFFSET_REF | |
4789 | || TREE_CODE (expr) == MEMBER_REF) | |
4790 | /* We're only interested in the field itself. If it is a | |
4791 | BASELINK, we will need to see through it in the next | |
4792 | step. */ | |
4793 | expr = TREE_OPERAND (expr, 1); | |
4794 | ||
4795 | if (TREE_CODE (expr) == BASELINK) | |
4796 | /* See through BASELINK nodes to the underlying functions. */ | |
4797 | expr = BASELINK_FUNCTIONS (expr); | |
4798 | ||
ccb05613 JM |
4799 | if (TREE_CODE (expr) == TEMPLATE_ID_EXPR) |
4800 | expr = TREE_OPERAND (expr, 0); | |
4801 | ||
3ad6a8e1 DG |
4802 | if (TREE_CODE (expr) == OVERLOAD) |
4803 | { | |
ccb05613 JM |
4804 | if (OVL_CHAIN (expr) |
4805 | || TREE_CODE (OVL_FUNCTION (expr)) == TEMPLATE_DECL) | |
3ad6a8e1 DG |
4806 | { |
4807 | error ("%qE refers to a set of overloaded functions", orig_expr); | |
4808 | return error_mark_node; | |
4809 | } | |
4810 | else | |
4811 | /* An overload set containing only one function: just look | |
4812 | at that function. */ | |
4813 | expr = OVL_FUNCTION (expr); | |
4814 | } | |
4815 | ||
4816 | switch (TREE_CODE (expr)) | |
4817 | { | |
4818 | case FIELD_DECL: | |
e76d7cc7 | 4819 | if (DECL_BIT_FIELD_TYPE (expr)) |
3ad6a8e1 DG |
4820 | { |
4821 | type = DECL_BIT_FIELD_TYPE (expr); | |
4822 | break; | |
4823 | } | |
4824 | /* Fall through for fields that aren't bitfields. */ | |
4825 | ||
4826 | case FUNCTION_DECL: | |
4827 | case VAR_DECL: | |
4828 | case CONST_DECL: | |
4829 | case PARM_DECL: | |
4830 | case RESULT_DECL: | |
088d4f95 | 4831 | case TEMPLATE_PARM_INDEX: |
03a904b5 | 4832 | expr = mark_type_use (expr); |
3ad6a8e1 DG |
4833 | type = TREE_TYPE (expr); |
4834 | break; | |
4835 | ||
4836 | case ERROR_MARK: | |
4837 | type = error_mark_node; | |
4838 | break; | |
4839 | ||
4840 | case COMPONENT_REF: | |
03a904b5 | 4841 | mark_type_use (expr); |
3ad6a8e1 DG |
4842 | type = is_bitfield_expr_with_lowered_type (expr); |
4843 | if (!type) | |
4844 | type = TREE_TYPE (TREE_OPERAND (expr, 1)); | |
4845 | break; | |
4846 | ||
4847 | case BIT_FIELD_REF: | |
4848 | gcc_unreachable (); | |
4849 | ||
4850 | case INTEGER_CST: | |
4851 | /* We can get here when the id-expression refers to an | |
4852 | enumerator. */ | |
4853 | type = TREE_TYPE (expr); | |
4854 | break; | |
4855 | ||
4856 | default: | |
91929b4d JJ |
4857 | gcc_assert (TYPE_P (expr) || DECL_P (expr) |
4858 | || TREE_CODE (expr) == SCOPE_REF); | |
3ad6a8e1 DG |
4859 | error ("argument to decltype must be an expression"); |
4860 | return error_mark_node; | |
4861 | } | |
4862 | } | |
4863 | else | |
4864 | { | |
e4fd5b87 DG |
4865 | /* Expressions of reference type are sometimes wrapped in |
4866 | INDIRECT_REFs. INDIRECT_REFs are just internal compiler | |
4867 | representation, not part of the language, so we have to look | |
4868 | through them. */ | |
4869 | if (TREE_CODE (expr) == INDIRECT_REF | |
4870 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) | |
4871 | == REFERENCE_TYPE) | |
4872 | expr = TREE_OPERAND (expr, 0); | |
4873 | ||
ed85a1f6 DG |
4874 | if (TREE_CODE (expr) == CALL_EXPR) |
4875 | { | |
4876 | /* If e is a function call (5.2.2 [expr.call]) or an | |
3ad6a8e1 DG |
4877 | invocation of an overloaded operator (parentheses around e |
4878 | are ignored), decltype(e) is defined as the return type of | |
4879 | that function. */ | |
ed85a1f6 DG |
4880 | tree fndecl = get_callee_fndecl (expr); |
4881 | if (fndecl && fndecl != error_mark_node) | |
4882 | type = TREE_TYPE (TREE_TYPE (fndecl)); | |
4883 | else | |
4884 | { | |
4885 | tree target_type = TREE_TYPE (CALL_EXPR_FN (expr)); | |
4886 | if ((TREE_CODE (target_type) == REFERENCE_TYPE | |
4887 | || TREE_CODE (target_type) == POINTER_TYPE) | |
4888 | && (TREE_CODE (TREE_TYPE (target_type)) == FUNCTION_TYPE | |
4889 | || TREE_CODE (TREE_TYPE (target_type)) == METHOD_TYPE)) | |
4890 | type = TREE_TYPE (TREE_TYPE (target_type)); | |
d1c05c88 JM |
4891 | else if (processing_template_decl) |
4892 | /* Within a template finish_call_expr doesn't resolve | |
4893 | CALL_EXPR_FN, so even though this decltype isn't really | |
4894 | dependent let's defer resolving it. */ | |
4895 | goto treat_as_dependent; | |
ed85a1f6 DG |
4896 | else |
4897 | sorry ("unable to determine the declared type of expression %<%E%>", | |
4898 | expr); | |
4899 | } | |
4900 | } | |
3ad6a8e1 DG |
4901 | else |
4902 | { | |
4903 | type = is_bitfield_expr_with_lowered_type (expr); | |
4904 | if (type) | |
4905 | { | |
4906 | /* Bitfields are special, because their type encodes the | |
4907 | number of bits they store. If the expression referenced a | |
4908 | bitfield, TYPE now has the declared type of that | |
4909 | bitfield. */ | |
4910 | type = cp_build_qualified_type (type, | |
4911 | cp_type_quals (TREE_TYPE (expr))); | |
4912 | ||
4913 | if (real_lvalue_p (expr)) | |
4914 | type = build_reference_type (type); | |
4915 | } | |
d5f4eddd JM |
4916 | /* Within a lambda-expression: |
4917 | ||
4918 | Every occurrence of decltype((x)) where x is a possibly | |
4919 | parenthesized id-expression that names an entity of | |
4920 | automatic storage duration is treated as if x were | |
4921 | transformed into an access to a corresponding data member | |
4922 | of the closure type that would have been declared if x | |
4923 | were a use of the denoted entity. */ | |
4924 | else if (outer_automatic_var_p (expr) | |
4925 | && current_function_decl | |
4926 | && LAMBDA_FUNCTION_P (current_function_decl)) | |
4927 | type = capture_decltype (expr); | |
3ad6a8e1 DG |
4928 | else |
4929 | { | |
4930 | /* Otherwise, where T is the type of e, if e is an lvalue, | |
4931 | decltype(e) is defined as T&, otherwise decltype(e) is | |
4932 | defined as T. */ | |
4933 | type = TREE_TYPE (expr); | |
e4fd5b87 DG |
4934 | if (type == error_mark_node) |
4935 | return error_mark_node; | |
4936 | else if (expr == current_class_ptr) | |
3ad6a8e1 DG |
4937 | /* If the expression is just "this", we want the |
4938 | cv-unqualified pointer for the "this" type. */ | |
4939 | type = TYPE_MAIN_VARIANT (type); | |
4940 | else if (real_lvalue_p (expr)) | |
4941 | { | |
8145be01 JM |
4942 | if (TREE_CODE (type) != REFERENCE_TYPE |
4943 | || TYPE_REF_IS_RVALUE (type)) | |
4944 | type = build_reference_type (non_reference (type)); | |
3ad6a8e1 DG |
4945 | } |
4946 | else | |
4947 | type = non_reference (type); | |
4948 | } | |
4949 | } | |
4950 | } | |
4951 | ||
4952 | if (!type || type == unknown_type_node) | |
4953 | { | |
4954 | error ("type of %qE is unknown", expr); | |
4955 | return error_mark_node; | |
4956 | } | |
4957 | ||
4958 | return type; | |
4959 | } | |
cf22909c | 4960 | |
b29441ec PC |
4961 | /* Called from trait_expr_value to evaluate either __has_nothrow_assign or |
4962 | __has_nothrow_copy, depending on assign_p. */ | |
cb68ec50 PC |
4963 | |
4964 | static bool | |
b29441ec | 4965 | classtype_has_nothrow_assign_or_copy_p (tree type, bool assign_p) |
cb68ec50 | 4966 | { |
b29441ec | 4967 | tree fns; |
cb68ec50 | 4968 | |
b29441ec PC |
4969 | if (assign_p) |
4970 | { | |
4971 | int ix; | |
4972 | ix = lookup_fnfields_1 (type, ansi_assopname (NOP_EXPR)); | |
4973 | if (ix < 0) | |
cb68ec50 | 4974 | return false; |
b29441ec PC |
4975 | fns = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), ix); |
4976 | } | |
066ec0a4 | 4977 | else if (TYPE_HAS_COPY_CTOR (type)) |
b29441ec PC |
4978 | { |
4979 | /* If construction of the copy constructor was postponed, create | |
4980 | it now. */ | |
4981 | if (CLASSTYPE_LAZY_COPY_CTOR (type)) | |
4982 | lazily_declare_fn (sfk_copy_constructor, type); | |
d5f4eddd JM |
4983 | if (CLASSTYPE_LAZY_MOVE_CTOR (type)) |
4984 | lazily_declare_fn (sfk_move_constructor, type); | |
b29441ec | 4985 | fns = CLASSTYPE_CONSTRUCTORS (type); |
cb68ec50 PC |
4986 | } |
4987 | else | |
4988 | return false; | |
4989 | ||
b29441ec | 4990 | for (; fns; fns = OVL_NEXT (fns)) |
279086c3 PC |
4991 | { |
4992 | tree fn = OVL_CURRENT (fns); | |
4993 | ||
4994 | if (assign_p) | |
4995 | { | |
4996 | if (copy_fn_p (fn) == 0) | |
4997 | continue; | |
4998 | } | |
4999 | else if (copy_fn_p (fn) <= 0) | |
5000 | continue; | |
5001 | ||
5002 | if (!TYPE_NOTHROW_P (TREE_TYPE (fn))) | |
5003 | return false; | |
5004 | } | |
b29441ec | 5005 | |
cb68ec50 PC |
5006 | return true; |
5007 | } | |
5008 | ||
5009 | /* Actually evaluates the trait. */ | |
5010 | ||
5011 | static bool | |
5012 | trait_expr_value (cp_trait_kind kind, tree type1, tree type2) | |
5013 | { | |
5014 | enum tree_code type_code1; | |
5015 | tree t; | |
5016 | ||
5017 | type_code1 = TREE_CODE (type1); | |
5018 | ||
5019 | switch (kind) | |
5020 | { | |
5021 | case CPTK_HAS_NOTHROW_ASSIGN: | |
c32097d8 | 5022 | type1 = strip_array_types (type1); |
b29441ec PC |
5023 | return (!CP_TYPE_CONST_P (type1) && type_code1 != REFERENCE_TYPE |
5024 | && (trait_expr_value (CPTK_HAS_TRIVIAL_ASSIGN, type1, type2) | |
5025 | || (CLASS_TYPE_P (type1) | |
5026 | && classtype_has_nothrow_assign_or_copy_p (type1, | |
5027 | true)))); | |
cb68ec50 PC |
5028 | |
5029 | case CPTK_HAS_TRIVIAL_ASSIGN: | |
c32097d8 JM |
5030 | /* ??? The standard seems to be missing the "or array of such a class |
5031 | type" wording for this trait. */ | |
5032 | type1 = strip_array_types (type1); | |
cb68ec50 | 5033 | return (!CP_TYPE_CONST_P (type1) && type_code1 != REFERENCE_TYPE |
c32097d8 | 5034 | && (trivial_type_p (type1) |
cb68ec50 | 5035 | || (CLASS_TYPE_P (type1) |
066ec0a4 | 5036 | && TYPE_HAS_TRIVIAL_COPY_ASSIGN (type1)))); |
cb68ec50 PC |
5037 | |
5038 | case CPTK_HAS_NOTHROW_CONSTRUCTOR: | |
5039 | type1 = strip_array_types (type1); | |
5040 | return (trait_expr_value (CPTK_HAS_TRIVIAL_CONSTRUCTOR, type1, type2) | |
5041 | || (CLASS_TYPE_P (type1) | |
ac177431 | 5042 | && (t = locate_ctor (type1)) |
e24313f3 | 5043 | && TYPE_NOTHROW_P (TREE_TYPE (t)))); |
cb68ec50 PC |
5044 | |
5045 | case CPTK_HAS_TRIVIAL_CONSTRUCTOR: | |
5046 | type1 = strip_array_types (type1); | |
c32097d8 | 5047 | return (trivial_type_p (type1) |
cb68ec50 PC |
5048 | || (CLASS_TYPE_P (type1) && TYPE_HAS_TRIVIAL_DFLT (type1))); |
5049 | ||
5050 | case CPTK_HAS_NOTHROW_COPY: | |
c32097d8 | 5051 | type1 = strip_array_types (type1); |
cb68ec50 PC |
5052 | return (trait_expr_value (CPTK_HAS_TRIVIAL_COPY, type1, type2) |
5053 | || (CLASS_TYPE_P (type1) | |
b29441ec | 5054 | && classtype_has_nothrow_assign_or_copy_p (type1, false))); |
cb68ec50 PC |
5055 | |
5056 | case CPTK_HAS_TRIVIAL_COPY: | |
c32097d8 JM |
5057 | /* ??? The standard seems to be missing the "or array of such a class |
5058 | type" wording for this trait. */ | |
5059 | type1 = strip_array_types (type1); | |
5060 | return (trivial_type_p (type1) || type_code1 == REFERENCE_TYPE | |
066ec0a4 | 5061 | || (CLASS_TYPE_P (type1) && TYPE_HAS_TRIVIAL_COPY_CTOR (type1))); |
cb68ec50 PC |
5062 | |
5063 | case CPTK_HAS_TRIVIAL_DESTRUCTOR: | |
5064 | type1 = strip_array_types (type1); | |
c32097d8 | 5065 | return (trivial_type_p (type1) || type_code1 == REFERENCE_TYPE |
cb68ec50 PC |
5066 | || (CLASS_TYPE_P (type1) |
5067 | && TYPE_HAS_TRIVIAL_DESTRUCTOR (type1))); | |
5068 | ||
5069 | case CPTK_HAS_VIRTUAL_DESTRUCTOR: | |
46408846 | 5070 | return type_has_virtual_destructor (type1); |
cb68ec50 PC |
5071 | |
5072 | case CPTK_IS_ABSTRACT: | |
5073 | return (CLASS_TYPE_P (type1) && CLASSTYPE_PURE_VIRTUALS (type1)); | |
5074 | ||
5075 | case CPTK_IS_BASE_OF: | |
5076 | return (NON_UNION_CLASS_TYPE_P (type1) && NON_UNION_CLASS_TYPE_P (type2) | |
5077 | && DERIVED_FROM_P (type1, type2)); | |
5078 | ||
5079 | case CPTK_IS_CLASS: | |
5080 | return (NON_UNION_CLASS_TYPE_P (type1)); | |
5081 | ||
5082 | case CPTK_IS_CONVERTIBLE_TO: | |
5083 | /* TODO */ | |
5084 | return false; | |
5085 | ||
5086 | case CPTK_IS_EMPTY: | |
5087 | return (NON_UNION_CLASS_TYPE_P (type1) && CLASSTYPE_EMPTY_P (type1)); | |
5088 | ||
5089 | case CPTK_IS_ENUM: | |
5090 | return (type_code1 == ENUMERAL_TYPE); | |
5091 | ||
5092 | case CPTK_IS_POD: | |
5093 | return (pod_type_p (type1)); | |
5094 | ||
5095 | case CPTK_IS_POLYMORPHIC: | |
5096 | return (CLASS_TYPE_P (type1) && TYPE_POLYMORPHIC_P (type1)); | |
5097 | ||
c32097d8 JM |
5098 | case CPTK_IS_STD_LAYOUT: |
5099 | return (std_layout_type_p (type1)); | |
5100 | ||
5101 | case CPTK_IS_TRIVIAL: | |
5102 | return (trivial_type_p (type1)); | |
5103 | ||
cb68ec50 PC |
5104 | case CPTK_IS_UNION: |
5105 | return (type_code1 == UNION_TYPE); | |
5106 | ||
2b08f2c5 JM |
5107 | case CPTK_IS_LITERAL_TYPE: |
5108 | return (literal_type_p (type1)); | |
5109 | ||
cb68ec50 PC |
5110 | default: |
5111 | gcc_unreachable (); | |
5112 | return false; | |
5113 | } | |
5114 | } | |
5115 | ||
ff284b4b PC |
5116 | /* Returns true if TYPE is a complete type, an array of unknown bound, |
5117 | or (possibly cv-qualified) void, returns false otherwise. */ | |
5118 | ||
5119 | static bool | |
5120 | check_trait_type (tree type) | |
5121 | { | |
5122 | if (COMPLETE_TYPE_P (type)) | |
5123 | return true; | |
5124 | ||
f94ae987 JM |
5125 | if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type) |
5126 | && COMPLETE_TYPE_P (TREE_TYPE (type))) | |
ff284b4b PC |
5127 | return true; |
5128 | ||
5129 | if (VOID_TYPE_P (type)) | |
5130 | return true; | |
5131 | ||
5132 | return false; | |
5133 | } | |
5134 | ||
cb68ec50 PC |
5135 | /* Process a trait expression. */ |
5136 | ||
5137 | tree | |
5138 | finish_trait_expr (cp_trait_kind kind, tree type1, tree type2) | |
5139 | { | |
5140 | gcc_assert (kind == CPTK_HAS_NOTHROW_ASSIGN | |
5141 | || kind == CPTK_HAS_NOTHROW_CONSTRUCTOR | |
5142 | || kind == CPTK_HAS_NOTHROW_COPY | |
5143 | || kind == CPTK_HAS_TRIVIAL_ASSIGN | |
5144 | || kind == CPTK_HAS_TRIVIAL_CONSTRUCTOR | |
5145 | || kind == CPTK_HAS_TRIVIAL_COPY | |
5146 | || kind == CPTK_HAS_TRIVIAL_DESTRUCTOR | |
5147 | || kind == CPTK_HAS_VIRTUAL_DESTRUCTOR | |
5148 | || kind == CPTK_IS_ABSTRACT | |
5149 | || kind == CPTK_IS_BASE_OF | |
5150 | || kind == CPTK_IS_CLASS | |
5151 | || kind == CPTK_IS_CONVERTIBLE_TO | |
5152 | || kind == CPTK_IS_EMPTY | |
5153 | || kind == CPTK_IS_ENUM | |
5154 | || kind == CPTK_IS_POD | |
5155 | || kind == CPTK_IS_POLYMORPHIC | |
c32097d8 JM |
5156 | || kind == CPTK_IS_STD_LAYOUT |
5157 | || kind == CPTK_IS_TRIVIAL | |
2b08f2c5 | 5158 | || kind == CPTK_IS_LITERAL_TYPE |
cb68ec50 PC |
5159 | || kind == CPTK_IS_UNION); |
5160 | ||
5161 | if (kind == CPTK_IS_CONVERTIBLE_TO) | |
5162 | { | |
5163 | sorry ("__is_convertible_to"); | |
5164 | return error_mark_node; | |
5165 | } | |
5166 | ||
5167 | if (type1 == error_mark_node | |
5168 | || ((kind == CPTK_IS_BASE_OF || kind == CPTK_IS_CONVERTIBLE_TO) | |
5169 | && type2 == error_mark_node)) | |
5170 | return error_mark_node; | |
5171 | ||
5172 | if (processing_template_decl) | |
5173 | { | |
5174 | tree trait_expr = make_node (TRAIT_EXPR); | |
5175 | TREE_TYPE (trait_expr) = boolean_type_node; | |
5176 | TRAIT_EXPR_TYPE1 (trait_expr) = type1; | |
5177 | TRAIT_EXPR_TYPE2 (trait_expr) = type2; | |
5178 | TRAIT_EXPR_KIND (trait_expr) = kind; | |
5179 | return trait_expr; | |
5180 | } | |
5181 | ||
10c1d4af PC |
5182 | complete_type (type1); |
5183 | if (type2) | |
5184 | complete_type (type2); | |
5185 | ||
ff284b4b | 5186 | switch (kind) |
cb68ec50 | 5187 | { |
ff284b4b PC |
5188 | case CPTK_HAS_NOTHROW_ASSIGN: |
5189 | case CPTK_HAS_TRIVIAL_ASSIGN: | |
5190 | case CPTK_HAS_NOTHROW_CONSTRUCTOR: | |
5191 | case CPTK_HAS_TRIVIAL_CONSTRUCTOR: | |
5192 | case CPTK_HAS_NOTHROW_COPY: | |
5193 | case CPTK_HAS_TRIVIAL_COPY: | |
5194 | case CPTK_HAS_TRIVIAL_DESTRUCTOR: | |
5195 | case CPTK_HAS_VIRTUAL_DESTRUCTOR: | |
5196 | case CPTK_IS_ABSTRACT: | |
5197 | case CPTK_IS_EMPTY: | |
5198 | case CPTK_IS_POD: | |
5199 | case CPTK_IS_POLYMORPHIC: | |
c32097d8 JM |
5200 | case CPTK_IS_STD_LAYOUT: |
5201 | case CPTK_IS_TRIVIAL: | |
2b08f2c5 | 5202 | case CPTK_IS_LITERAL_TYPE: |
ff284b4b PC |
5203 | if (!check_trait_type (type1)) |
5204 | { | |
5205 | error ("incomplete type %qT not allowed", type1); | |
5206 | return error_mark_node; | |
5207 | } | |
5208 | break; | |
5209 | ||
5210 | case CPTK_IS_BASE_OF: | |
5211 | if (NON_UNION_CLASS_TYPE_P (type1) && NON_UNION_CLASS_TYPE_P (type2) | |
5212 | && !same_type_ignoring_top_level_qualifiers_p (type1, type2) | |
5213 | && !COMPLETE_TYPE_P (type2)) | |
5214 | { | |
5215 | error ("incomplete type %qT not allowed", type2); | |
5216 | return error_mark_node; | |
5217 | } | |
5218 | break; | |
5219 | ||
5220 | case CPTK_IS_CLASS: | |
5221 | case CPTK_IS_ENUM: | |
5222 | case CPTK_IS_UNION: | |
5223 | break; | |
5224 | ||
5225 | case CPTK_IS_CONVERTIBLE_TO: | |
5226 | default: | |
5227 | gcc_unreachable (); | |
cb68ec50 PC |
5228 | } |
5229 | ||
5230 | return (trait_expr_value (kind, type1, type2) | |
5231 | ? boolean_true_node : boolean_false_node); | |
5232 | } | |
5233 | ||
6ec637a4 JJ |
5234 | /* Do-nothing variants of functions to handle pragma FLOAT_CONST_DECIMAL64, |
5235 | which is ignored for C++. */ | |
5236 | ||
5237 | void | |
5238 | set_float_const_decimal64 (void) | |
5239 | { | |
5240 | } | |
5241 | ||
5242 | void | |
5243 | clear_float_const_decimal64 (void) | |
5244 | { | |
5245 | } | |
5246 | ||
5247 | bool | |
5248 | float_const_decimal64_p (void) | |
5249 | { | |
5250 | return 0; | |
5251 | } | |
5252 | ||
3b49d762 | 5253 | \f |
7ecbca9d GDR |
5254 | /* Return true if T is a literal type. */ |
5255 | ||
5256 | bool | |
5257 | literal_type_p (tree t) | |
5258 | { | |
5259 | if (SCALAR_TYPE_P (t)) | |
5260 | return true; | |
5261 | if (CLASS_TYPE_P (t)) | |
5262 | return CLASSTYPE_LITERAL_P (t); | |
5263 | if (TREE_CODE (t) == ARRAY_TYPE) | |
5264 | return literal_type_p (strip_array_types (t)); | |
5265 | return false; | |
5266 | } | |
5267 | ||
7ecbca9d GDR |
5268 | /* If DECL is a variable declared `constexpr', require its type |
5269 | be literal. Return the DECL if OK, otherwise NULL. */ | |
5270 | ||
5271 | tree | |
5272 | ensure_literal_type_for_constexpr_object (tree decl) | |
5273 | { | |
5274 | tree type = TREE_TYPE (decl); | |
5275 | if (TREE_CODE (decl) == VAR_DECL && DECL_DECLARED_CONSTEXPR_P (decl) | |
5276 | && !processing_template_decl && !literal_type_p (type)) | |
5277 | { | |
5278 | error ("the type %qT of constexpr variable %qD is not literal", | |
5279 | type, decl); | |
5280 | return NULL; | |
5281 | } | |
5282 | return decl; | |
5283 | } | |
5284 | ||
66e61a34 JM |
5285 | /* Representation of entries in the constexpr function definition table. */ |
5286 | ||
5287 | typedef struct GTY(()) constexpr_fundef { | |
5288 | tree decl; | |
5289 | tree body; | |
5290 | } constexpr_fundef; | |
5291 | ||
5292 | /* This table holds all constexpr function definitions seen in | |
5293 | the current translation unit. */ | |
5294 | ||
5295 | static GTY ((param_is (constexpr_fundef))) htab_t constexpr_fundef_table; | |
5296 | ||
5297 | static bool potential_constant_expression (tree, tsubst_flags_t); | |
5298 | ||
5299 | /* Utility function used for managing the constexpr function table. | |
5300 | Return true if the entries pointed to by P and Q are for the | |
5301 | same constexpr function. */ | |
5302 | ||
5303 | static inline int | |
5304 | constexpr_fundef_equal (const void *p, const void *q) | |
5305 | { | |
5306 | const constexpr_fundef *lhs = (const constexpr_fundef *) p; | |
5307 | const constexpr_fundef *rhs = (const constexpr_fundef *) q; | |
5308 | return lhs->decl == rhs->decl; | |
5309 | } | |
5310 | ||
5311 | /* Utility function used for managing the constexpr function table. | |
5312 | Return a hash value for the entry pointed to by Q. */ | |
5313 | ||
5314 | static inline hashval_t | |
5315 | constexpr_fundef_hash (const void *p) | |
5316 | { | |
5317 | const constexpr_fundef *fundef = (const constexpr_fundef *) p; | |
5318 | return DECL_UID (fundef->decl); | |
5319 | } | |
5320 | ||
5321 | /* Return a previously saved definition of function FUN. */ | |
5322 | ||
5323 | static constexpr_fundef * | |
5324 | retrieve_constexpr_fundef (tree fun) | |
5325 | { | |
5326 | constexpr_fundef fundef = { NULL, NULL }; | |
5327 | if (constexpr_fundef_table == NULL) | |
5328 | return NULL; | |
5329 | ||
5330 | fundef.decl = fun; | |
5331 | return (constexpr_fundef *) htab_find (constexpr_fundef_table, &fundef); | |
5332 | } | |
5333 | ||
91ea6df3 GDR |
5334 | /* Return true if type expression T is a valid parameter type, or |
5335 | a valid return type, of a constexpr function. */ | |
5336 | ||
5337 | static bool | |
5338 | valid_type_in_constexpr_fundecl_p (tree t) | |
5339 | { | |
5340 | return (literal_type_p (t) | |
5341 | /* FIXME we allow ref to non-literal; should change standard to | |
5342 | match, or change back if not. */ | |
5343 | || TREE_CODE (t) == REFERENCE_TYPE); | |
5344 | } | |
5345 | ||
5346 | /* Check whether the parameter and return types of FUN are valid for a | |
5347 | constexpr function, and complain if COMPLAIN. */ | |
5348 | ||
5349 | static bool | |
5350 | is_valid_constexpr_fn (tree fun, bool complain) | |
5351 | { | |
5352 | tree parm = FUNCTION_FIRST_USER_PARM (fun); | |
5353 | bool ret = true; | |
5354 | for (; parm != NULL; parm = TREE_CHAIN (parm)) | |
5355 | if (!valid_type_in_constexpr_fundecl_p (TREE_TYPE (parm))) | |
5356 | { | |
5357 | ret = false; | |
5358 | if (complain) | |
5359 | error ("invalid type for parameter %q#D of constexpr function", | |
5360 | parm); | |
5361 | } | |
5362 | ||
5363 | if (!DECL_CONSTRUCTOR_P (fun)) | |
5364 | { | |
5365 | tree rettype = TREE_TYPE (TREE_TYPE (fun)); | |
5366 | if (!valid_type_in_constexpr_fundecl_p (rettype)) | |
5367 | { | |
5368 | ret = false; | |
5369 | if (complain) | |
5370 | error ("invalid return type %qT of constexpr function %qD", | |
5371 | rettype, fun); | |
5372 | } | |
5373 | ||
5374 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fun) | |
5375 | && COMPLETE_TYPE_P (DECL_CONTEXT (fun)) | |
5376 | && !valid_type_in_constexpr_fundecl_p (DECL_CONTEXT (fun))) | |
5377 | { | |
5378 | ret = false; | |
5379 | if (complain) | |
5380 | error ("enclosing class of %q#D is not a literal type", fun); | |
5381 | } | |
5382 | } | |
5383 | ||
5384 | return ret; | |
5385 | } | |
5386 | ||
7ecbca9d GDR |
5387 | /* Return non-null if FUN certainly designates a valid constexpr function |
5388 | declaration. Otherwise return NULL. Issue appropriate diagnostics | |
5389 | if necessary. Note that we only check the declaration, not the body | |
5390 | of the function. */ | |
5391 | ||
5392 | tree | |
5393 | validate_constexpr_fundecl (tree fun) | |
5394 | { | |
66e61a34 JM |
5395 | constexpr_fundef entry; |
5396 | constexpr_fundef **slot; | |
5397 | ||
91ea6df3 | 5398 | if (processing_template_decl || !DECL_DECLARED_CONSTEXPR_P (fun)) |
7ecbca9d | 5399 | return NULL; |
91ea6df3 GDR |
5400 | else if (DECL_CLONED_FUNCTION_P (fun)) |
5401 | /* We already checked the original function. */ | |
7ecbca9d GDR |
5402 | return fun; |
5403 | ||
91ea6df3 | 5404 | if (!is_valid_constexpr_fn (fun, !DECL_TEMPLATE_INSTANTIATION (fun))) |
7ecbca9d | 5405 | { |
91ea6df3 | 5406 | DECL_DECLARED_CONSTEXPR_P (fun) = false; |
7ecbca9d GDR |
5407 | return NULL; |
5408 | } | |
91ea6df3 | 5409 | |
66e61a34 JM |
5410 | /* Create the constexpr function table if necessary. */ |
5411 | if (constexpr_fundef_table == NULL) | |
5412 | constexpr_fundef_table = htab_create_ggc (101, | |
5413 | constexpr_fundef_hash, | |
5414 | constexpr_fundef_equal, | |
5415 | ggc_free); | |
5416 | entry.decl = fun; | |
5417 | entry.body = NULL; | |
5418 | slot = (constexpr_fundef **) | |
5419 | htab_find_slot (constexpr_fundef_table, &entry, INSERT); | |
5420 | if (*slot == NULL) | |
5421 | { | |
5422 | *slot = ggc_alloc_constexpr_fundef (); | |
5423 | **slot = entry; | |
5424 | } | |
5425 | return fun; | |
5426 | } | |
5427 | ||
5428 | /* Subroutine of build_constexpr_constructor_member_initializers. | |
5429 | The expression tree T represents a data member initialization | |
5430 | in a (constexpr) constructor definition. Build a pairing of | |
5431 | the data member with its initializer, and prepend that pair | |
5432 | to the existing initialization pair INITS. */ | |
5433 | ||
5434 | static bool | |
5435 | build_data_member_initialization (tree t, VEC(constructor_elt,gc) **vec) | |
5436 | { | |
5437 | tree member, init; | |
5438 | if (TREE_CODE (t) == CLEANUP_POINT_EXPR) | |
5439 | t = TREE_OPERAND (t, 0); | |
5440 | if (TREE_CODE (t) == EXPR_STMT) | |
5441 | t = TREE_OPERAND (t, 0); | |
5442 | if (t == error_mark_node) | |
5443 | return false; | |
5444 | if (TREE_CODE (t) == CLEANUP_STMT) | |
5445 | /* We can't see a CLEANUP_STMT in a constructor for a literal class, | |
5446 | but we can in a constexpr constructor for a non-literal class. Just | |
5447 | ignore it; either all the initialization will be constant, in which | |
5448 | case the cleanup can't run, or it can't be constexpr. */ | |
5449 | return true; | |
5450 | if (TREE_CODE (t) == CONVERT_EXPR) | |
5451 | t = TREE_OPERAND (t, 0); | |
5452 | if (TREE_CODE (t) == INIT_EXPR | |
5453 | || TREE_CODE (t) == MODIFY_EXPR) | |
5454 | { | |
5455 | member = TREE_OPERAND (t, 0); | |
5456 | init = unshare_expr (TREE_OPERAND (t, 1)); | |
5457 | } | |
5458 | else | |
5459 | { | |
5460 | tree memtype; | |
5461 | gcc_assert (TREE_CODE (t) == CALL_EXPR); | |
5462 | member = CALL_EXPR_ARG (t, 0); | |
5463 | memtype = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (member))); | |
5464 | if (TREE_CODE (member) == NOP_EXPR) | |
5465 | { | |
5466 | /* We don't put out anything for an empty base. */ | |
5467 | gcc_assert (is_empty_class (memtype)); | |
5468 | /* But if the constructor used isn't constexpr, leave in the call | |
5469 | so we complain later. */ | |
5470 | if (potential_constant_expression (t, tf_none)) | |
5471 | return true; | |
5472 | } | |
5473 | else | |
5474 | { | |
5475 | gcc_assert (TREE_CODE (member) == ADDR_EXPR); | |
5476 | member = TREE_OPERAND (member, 0); | |
5477 | } | |
5478 | /* We don't use build_cplus_new here because it complains about | |
5479 | abstract bases. T has the wrong type, but | |
5480 | cxx_eval_constant_expression doesn't care. */ | |
5481 | init = unshare_expr (t); | |
5482 | } | |
5483 | if (TREE_CODE (member) == COMPONENT_REF) | |
5484 | member = TREE_OPERAND (member, 1); | |
5485 | CONSTRUCTOR_APPEND_ELT (*vec, member, init); | |
5486 | return true; | |
5487 | } | |
5488 | ||
5489 | /* Build compile-time evalable representations of member-initializer list | |
5490 | for a constexpr constructor. */ | |
5491 | ||
5492 | static tree | |
5493 | build_constexpr_constructor_member_initializers (tree type, tree body) | |
5494 | { | |
5495 | VEC(constructor_elt,gc) *vec = NULL; | |
5496 | bool ok = true; | |
5497 | if (TREE_CODE (body) == MUST_NOT_THROW_EXPR | |
5498 | || TREE_CODE (body) == EH_SPEC_BLOCK) | |
5499 | body = TREE_OPERAND (body, 0); | |
5500 | if (TREE_CODE (body) == BIND_EXPR) | |
5501 | body = BIND_EXPR_BODY (body); | |
5502 | if (TREE_CODE (body) == CLEANUP_POINT_EXPR) | |
5503 | ok = build_data_member_initialization (body, &vec); | |
5504 | else | |
5505 | { | |
5506 | tree_stmt_iterator i; | |
5507 | gcc_assert (TREE_CODE (body) == STATEMENT_LIST); | |
5508 | for (i = tsi_start (body); !tsi_end_p (i); tsi_next (&i)) | |
5509 | { | |
5510 | ok = build_data_member_initialization (tsi_stmt (i), &vec); | |
5511 | if (!ok) | |
5512 | break; | |
5513 | } | |
5514 | } | |
5515 | if (ok) | |
5516 | return build_constructor (type, vec); | |
5517 | else | |
5518 | return error_mark_node; | |
5519 | } | |
5520 | ||
5521 | /* We are processing the definition of the constexpr function FUN. | |
5522 | Check that its BODY fulfills the propriate requirements and | |
5523 | enter it in the constexpr function definition table. | |
5524 | For constructor BODY is actually the TREE_LIST of the | |
5525 | member-initializer list. */ | |
5526 | ||
5527 | tree | |
5528 | register_constexpr_fundef (tree fun, tree body) | |
5529 | { | |
5530 | constexpr_fundef *fundef = retrieve_constexpr_fundef (fun); | |
5531 | gcc_assert (fundef != NULL && fundef->body == NULL); | |
5532 | ||
5533 | if (DECL_CONSTRUCTOR_P (fun)) | |
5534 | body = build_constexpr_constructor_member_initializers | |
5535 | (DECL_CONTEXT (fun), body); | |
5536 | else | |
5537 | { | |
5538 | if (TREE_CODE (body) == BIND_EXPR) | |
5539 | body = BIND_EXPR_BODY (body); | |
5540 | if (TREE_CODE (body) == EH_SPEC_BLOCK) | |
5541 | body = EH_SPEC_STMTS (body); | |
5542 | if (TREE_CODE (body) == MUST_NOT_THROW_EXPR) | |
5543 | body = TREE_OPERAND (body, 0); | |
5544 | if (TREE_CODE (body) == CLEANUP_POINT_EXPR) | |
5545 | body = TREE_OPERAND (body, 0); | |
5546 | if (TREE_CODE (body) != RETURN_EXPR) | |
5547 | { | |
5548 | error ("body of constexpr function %qD not a return-statement", fun); | |
5549 | DECL_DECLARED_CONSTEXPR_P (fun) = false; | |
5550 | return NULL; | |
5551 | } | |
5552 | body = unshare_expr (TREE_OPERAND (body, 0)); | |
5553 | } | |
5554 | ||
5555 | if (!potential_constant_expression (body, (DECL_TEMPLATE_INSTANTIATION (fun) | |
5556 | ? tf_none : tf_error))) | |
5557 | { | |
5558 | DECL_DECLARED_CONSTEXPR_P (fun) = false; | |
5559 | return NULL; | |
5560 | } | |
5561 | fundef->body = body; | |
5562 | return fun; | |
5563 | } | |
5564 | ||
5565 | /* Return true if T designates the implied `this' parameter. */ | |
5566 | ||
5567 | static inline bool | |
5568 | is_this_parameter (tree t) | |
5569 | { | |
5570 | return t == current_class_ptr; | |
5571 | } | |
5572 | ||
5573 | /* We have an expression tree T that represents a call, either CALL_EXPR | |
5574 | or AGGR_INIT_EXPR. If the call is lexically to a named function, | |
5575 | retrun the _DECL for that function. */ | |
5576 | ||
5577 | static tree | |
5578 | get_function_named_in_call (tree t) | |
5579 | { | |
5580 | tree fun = NULL; | |
5581 | switch (TREE_CODE (t)) | |
5582 | { | |
5583 | case CALL_EXPR: | |
5584 | fun = CALL_EXPR_FN (t); | |
5585 | break; | |
5586 | ||
5587 | case AGGR_INIT_EXPR: | |
5588 | fun = AGGR_INIT_EXPR_FN (t); | |
5589 | break; | |
5590 | ||
5591 | default: | |
5592 | gcc_unreachable(); | |
5593 | break; | |
5594 | } | |
5595 | if (TREE_CODE (fun) == ADDR_EXPR | |
5596 | && TREE_CODE (TREE_OPERAND (fun, 0)) == FUNCTION_DECL) | |
5597 | fun = TREE_OPERAND (fun, 0); | |
7ecbca9d GDR |
5598 | return fun; |
5599 | } | |
5600 | ||
66e61a34 JM |
5601 | /* We have an expression tree T that represents a call, either CALL_EXPR |
5602 | or AGGR_INIT_EXPR. Return the Nth argument. */ | |
5603 | ||
5604 | static inline tree | |
5605 | get_nth_callarg (tree t, int n) | |
5606 | { | |
5607 | switch (TREE_CODE (t)) | |
5608 | { | |
5609 | case CALL_EXPR: | |
5610 | return CALL_EXPR_ARG (t, n); | |
5611 | ||
5612 | case AGGR_INIT_EXPR: | |
5613 | return AGGR_INIT_EXPR_ARG (t, n); | |
5614 | ||
5615 | default: | |
5616 | gcc_unreachable (); | |
5617 | return NULL; | |
5618 | } | |
5619 | } | |
5620 | ||
5621 | /* Return true if the object referred to by REF has automatic or thread | |
5622 | local storage. */ | |
7ecbca9d | 5623 | |
66e61a34 JM |
5624 | enum { ck_ok, ck_bad, ck_unknown }; |
5625 | static int | |
5626 | check_automatic_or_tls (tree ref) | |
5627 | { | |
5628 | enum machine_mode mode; | |
5629 | HOST_WIDE_INT bitsize, bitpos; | |
5630 | tree offset; | |
5631 | int volatilep = 0, unsignedp = 0; | |
5632 | tree decl = get_inner_reference (ref, &bitsize, &bitpos, &offset, | |
5633 | &mode, &unsignedp, &volatilep, false); | |
5634 | duration_kind dk; | |
5635 | ||
5636 | /* If there isn't a decl in the middle, we don't know the linkage here, | |
5637 | and this isn't a constant expression anyway. */ | |
5638 | if (!DECL_P (decl)) | |
5639 | return ck_unknown; | |
5640 | dk = decl_storage_duration (decl); | |
5641 | return (dk == dk_auto || dk == dk_thread) ? ck_bad : ck_ok; | |
5642 | } | |
5643 | ||
5644 | /* Return true if the DECL designates a builtin function that is | |
5645 | morally constexpr, in the sense that its parameter types and | |
5646 | return type are literal types and the compiler is allowed to | |
5647 | fold its invocations. */ | |
5648 | ||
5649 | static bool | |
5650 | morally_constexpr_builtin_function_p (tree decl) | |
5651 | { | |
5652 | tree funtype = TREE_TYPE (decl); | |
5653 | tree t; | |
5654 | ||
5655 | if (!is_builtin_fn (decl)) | |
5656 | return false; | |
5657 | if (!literal_type_p (TREE_TYPE (funtype))) | |
5658 | return false; | |
5659 | for (t = TYPE_ARG_TYPES (funtype); t != NULL ; t = TREE_CHAIN (t)) | |
5660 | { | |
5661 | if (t == void_list_node) | |
5662 | return true; | |
5663 | if (!literal_type_p (TREE_VALUE (t))) | |
5664 | return false; | |
5665 | } | |
5666 | /* We assume no varargs builtins are suitable. */ | |
5667 | return t != NULL; | |
5668 | } | |
5669 | ||
5670 | /* Return true if T denotes a constant expression, or potential constant | |
5671 | expression if POTENTIAL is true. | |
5672 | Issue diagnostic as appropriate under control of flags. Variables | |
5673 | with static storage duration initialized by constant expressions | |
5674 | are guaranteed to be statically initialized. | |
5675 | ||
5676 | C++0x [expr.const] | |
5677 | ||
5678 | 6 An expression is a potential constant expression if it is | |
5679 | a constant expression where all occurences of function | |
5680 | parameters are replaced by arbitrary constant expressions | |
5681 | of the appropriate type. | |
5682 | ||
5683 | 2 A conditional expression is a constant expression unless it | |
5684 | involves one of the following as a potentially evaluated | |
5685 | subexpression (3.2), but subexpressions of logical AND (5.14), | |
5686 | logical OR (5.15), and conditional (5.16) operations that are | |
5687 | not evaluated are not considered. */ | |
5688 | ||
5689 | static bool | |
5690 | potential_constant_expression (tree t, tsubst_flags_t flags) | |
5691 | { | |
5692 | int i; | |
5693 | tree tmp; | |
5694 | if (t == error_mark_node) | |
5695 | return false; | |
5696 | if (TREE_THIS_VOLATILE (t)) | |
5697 | { | |
5698 | if (flags & tf_error) | |
5699 | error ("expression %qE has side-effects", t); | |
5700 | return false; | |
5701 | } | |
5702 | if (CONSTANT_CLASS_P (t)) | |
5703 | return true; | |
5704 | ||
5705 | switch (TREE_CODE (t)) | |
5706 | { | |
5707 | case FUNCTION_DECL: | |
5708 | case LABEL_DECL: | |
5709 | case CONST_DECL: | |
5710 | return true; | |
5711 | ||
5712 | case PARM_DECL: | |
5713 | /* -- this (5.1) unless it appears as the postfix-expression in a | |
5714 | class member access expression, including the result of the | |
5715 | implicit transformation in the body of the non-static | |
5716 | member function (9.3.1); */ | |
5717 | if (is_this_parameter (t)) | |
5718 | { | |
5719 | if (flags & tf_error) | |
5720 | error ("%qE is not a potential constant expression", t); | |
5721 | return false; | |
5722 | } | |
5723 | return true; | |
5724 | ||
5725 | case AGGR_INIT_EXPR: | |
5726 | case CALL_EXPR: | |
5727 | /* -- an invocation of a function other than a constexpr function | |
5728 | or a constexpr constructor. */ | |
5729 | { | |
5730 | tree fun = get_function_named_in_call (t); | |
5731 | const int nargs = call_expr_nargs (t); | |
5732 | if (TREE_CODE (fun) != FUNCTION_DECL) | |
5733 | { | |
5734 | if (potential_constant_expression (fun, flags)) | |
5735 | /* Might end up being a constant function pointer. */ | |
5736 | return true; | |
5737 | if (flags & tf_error) | |
5738 | error ("%qE is not a function name", fun); | |
5739 | return false; | |
5740 | } | |
5741 | /* Skip initial arguments to base constructors. */ | |
5742 | if (DECL_BASE_CONSTRUCTOR_P (fun)) | |
5743 | i = num_artificial_parms_for (fun); | |
5744 | else | |
5745 | i = 0; | |
5746 | fun = DECL_ORIGIN (fun); | |
5747 | if (builtin_valid_in_constant_expr_p (fun)) | |
5748 | return true; | |
5749 | if (!DECL_DECLARED_CONSTEXPR_P (fun) | |
5750 | && !morally_constexpr_builtin_function_p (fun)) | |
5751 | { | |
5752 | if (flags & tf_error) | |
5753 | error ("%qD is not %<constexpr%>", fun); | |
5754 | return false; | |
5755 | } | |
5756 | for (; i < nargs; ++i) | |
5757 | { | |
5758 | tree x = get_nth_callarg (t, i); | |
5759 | /* A call to a non-static member function takes the | |
5760 | address of the object as the first argument. | |
5761 | But in a constant expression the address will be folded | |
5762 | away, so look through it now. */ | |
5763 | if (i == 0 && DECL_NONSTATIC_MEMBER_P (fun) | |
5764 | && !DECL_CONSTRUCTOR_P (fun)) | |
5765 | { | |
5766 | if (TREE_CODE (x) == ADDR_EXPR) | |
5767 | x = TREE_OPERAND (x, 0); | |
5768 | if (is_this_parameter (x)) | |
5769 | /* OK. */; | |
5770 | else if (!potential_constant_expression (x, flags)) | |
5771 | { | |
5772 | if (flags & tf_error) | |
5773 | error ("object argument is not a potential constant " | |
5774 | "expression"); | |
5775 | return false; | |
5776 | } | |
5777 | } | |
5778 | else if (!potential_constant_expression (x, flags)) | |
5779 | { | |
5780 | if (flags & tf_error) | |
5781 | error ("argument in position %qP is not a " | |
5782 | "potential constant expression", i); | |
5783 | return false; | |
5784 | } | |
5785 | } | |
5786 | return true; | |
5787 | } | |
5788 | ||
5789 | case NON_LVALUE_EXPR: | |
5790 | /* -- an lvalue-to-rvalue conversion (4.1) unless it is applied to | |
5791 | -- an lvalue of integral type that refers to a non-volatile | |
5792 | const variable or static data member initialized with | |
5793 | constant expressions, or | |
5794 | ||
5795 | -- an lvalue of literal type that refers to non-volatile | |
5796 | object defined with constexpr, or that refers to a | |
5797 | sub-object of such an object; */ | |
5798 | return potential_constant_expression (TREE_OPERAND (t, 0), flags); | |
5799 | ||
5800 | case VAR_DECL: | |
5801 | if (!decl_constant_var_p (t)) | |
5802 | { | |
5803 | if (flags & tf_error) | |
5804 | error ("variable %qD is not declared constexpr", t); | |
5805 | return false; | |
5806 | } | |
5807 | return true; | |
5808 | ||
5809 | case NOP_EXPR: | |
5810 | case CONVERT_EXPR: | |
5811 | case VIEW_CONVERT_EXPR: | |
5812 | /* -- an array-to-pointer conversion that is applied to an lvalue | |
5813 | that designates an object with thread or automatic storage | |
5814 | duration; FIXME not implemented as it breaks constexpr arrays; | |
5815 | need to fix the standard | |
5816 | -- a type conversion from a pointer or pointer-to-member type | |
5817 | to a literal type. */ | |
5818 | { | |
5819 | tree from = TREE_OPERAND (t, 0); | |
5820 | tree source = TREE_TYPE (from); | |
5821 | tree target = TREE_TYPE (t); | |
5822 | if (TYPE_PTR_P (source) && ARITHMETIC_TYPE_P (target) | |
5823 | && !(TREE_CODE (from) == COMPONENT_REF | |
5824 | && TYPE_PTRMEMFUNC_P (TREE_TYPE (TREE_OPERAND (from, 0))))) | |
5825 | { | |
5826 | if (flags & tf_error) | |
5827 | error ("conversion of expression %qE of pointer type " | |
5828 | "cannot yield a constant expression", from); | |
5829 | return false; | |
5830 | } | |
5831 | return potential_constant_expression (from, flags); | |
5832 | } | |
5833 | ||
5834 | case ADDR_EXPR: | |
5835 | /* -- a unary operator & that is applied to an lvalue that | |
5836 | designates an object with thread or automatic storage | |
5837 | duration; */ | |
5838 | t = TREE_OPERAND (t, 0); | |
5839 | i = check_automatic_or_tls (t); | |
5840 | if (i == ck_ok) | |
5841 | return true; | |
5842 | if (i == ck_bad) | |
5843 | { | |
5844 | if (flags & tf_error) | |
5845 | error ("address-of an object %qE with thread local or " | |
5846 | "automatic storage is not a constant expression", t); | |
5847 | return false; | |
5848 | } | |
5849 | return potential_constant_expression (t, flags); | |
5850 | ||
5851 | case COMPONENT_REF: | |
5852 | case BIT_FIELD_REF: | |
5853 | /* -- a class member access unless its postfix-expression is | |
5854 | of literal type or of pointer to literal type. */ | |
5855 | /* This test would be redundant, as it follows from the | |
5856 | postfix-expression being a potential constant expression. */ | |
5857 | return potential_constant_expression (TREE_OPERAND (t, 0), flags); | |
5858 | ||
5859 | case INDIRECT_REF: | |
5860 | { | |
5861 | tree x = TREE_OPERAND (t, 0); | |
5862 | STRIP_NOPS (x); | |
5863 | if (is_this_parameter (x)) | |
5864 | return true; | |
5865 | return potential_constant_expression (x, flags); | |
5866 | } | |
5867 | ||
5868 | case LAMBDA_EXPR: | |
5869 | case DYNAMIC_CAST_EXPR: | |
5870 | case PSEUDO_DTOR_EXPR: | |
5871 | case PREINCREMENT_EXPR: | |
5872 | case POSTINCREMENT_EXPR: | |
5873 | case PREDECREMENT_EXPR: | |
5874 | case POSTDECREMENT_EXPR: | |
5875 | case NEW_EXPR: | |
5876 | case VEC_NEW_EXPR: | |
5877 | case DELETE_EXPR: | |
5878 | case VEC_DELETE_EXPR: | |
5879 | case THROW_EXPR: | |
5880 | case MODIFY_EXPR: | |
5881 | case MODOP_EXPR: | |
5882 | /* GCC internal stuff. */ | |
5883 | case VA_ARG_EXPR: | |
5884 | case OBJ_TYPE_REF: | |
5885 | case WITH_CLEANUP_EXPR: | |
5886 | case CLEANUP_POINT_EXPR: | |
5887 | case MUST_NOT_THROW_EXPR: | |
5888 | case TRY_CATCH_EXPR: | |
5889 | case STATEMENT_LIST: | |
5890 | case BIND_EXPR: | |
5891 | if (flags & tf_error) | |
5892 | error ("expression %qE is not a constant-expression", t); | |
5893 | return false; | |
5894 | ||
5895 | case TYPEID_EXPR: | |
5896 | /* -- a typeid expression whose operand is of polymorphic | |
5897 | class type; */ | |
5898 | { | |
5899 | tree e = TREE_OPERAND (t, 0); | |
5900 | if (!TYPE_P (e) && TYPE_POLYMORPHIC_P (TREE_TYPE (e))) | |
5901 | { | |
5902 | if (flags & tf_error) | |
5903 | error ("typeid-expression is not a constant expression " | |
5904 | "because %qE is of polymorphic type", e); | |
5905 | return false; | |
5906 | } | |
5907 | return true; | |
5908 | } | |
5909 | ||
5910 | case MINUS_EXPR: | |
5911 | /* -- a subtraction where both operands are pointers. */ | |
5912 | if (TYPE_PTR_P (TREE_OPERAND (t, 0)) | |
5913 | && TYPE_PTR_P (TREE_OPERAND (t, 1))) | |
5914 | { | |
5915 | if (flags & tf_error) | |
5916 | error ("difference of two pointer expressions is not " | |
5917 | "a constant expression"); | |
5918 | return false; | |
5919 | } | |
5920 | goto binary; | |
5921 | ||
5922 | case LT_EXPR: | |
5923 | case LE_EXPR: | |
5924 | case GT_EXPR: | |
5925 | case GE_EXPR: | |
5926 | case EQ_EXPR: | |
5927 | case NE_EXPR: | |
5928 | /* -- a relational or equality operator where at least | |
5929 | one of the operands is a pointer. */ | |
5930 | if (TYPE_PTR_P (TREE_OPERAND (t, 0)) | |
5931 | || TYPE_PTR_P (TREE_OPERAND (t, 1))) | |
5932 | { | |
5933 | if (flags & tf_error) | |
5934 | error ("pointer comparison expression is not a " | |
5935 | "constant expression"); | |
5936 | return false; | |
5937 | } | |
5938 | goto binary; | |
5939 | ||
5940 | case REALPART_EXPR: | |
5941 | case IMAGPART_EXPR: | |
5942 | case CONJ_EXPR: | |
5943 | case SAVE_EXPR: | |
5944 | case FIX_TRUNC_EXPR: | |
5945 | case FLOAT_EXPR: | |
5946 | case NEGATE_EXPR: | |
5947 | case ABS_EXPR: | |
5948 | case BIT_NOT_EXPR: | |
5949 | case TRUTH_NOT_EXPR: | |
5950 | case PAREN_EXPR: | |
5951 | case FIXED_CONVERT_EXPR: | |
5952 | /* For convenience. */ | |
5953 | case RETURN_EXPR: | |
5954 | return potential_constant_expression (TREE_OPERAND (t, 0), flags); | |
5955 | ||
5956 | case INIT_EXPR: | |
5957 | case TARGET_EXPR: | |
5958 | return potential_constant_expression (TREE_OPERAND (t, 1), flags); | |
5959 | ||
5960 | case CONSTRUCTOR: | |
5961 | { | |
5962 | VEC(constructor_elt, gc) *v = CONSTRUCTOR_ELTS (t); | |
5963 | constructor_elt *ce; | |
5964 | for (i = 0; VEC_iterate (constructor_elt, v, i, ce); ++i) | |
5965 | if (!potential_constant_expression (ce->value, flags)) | |
5966 | return false; | |
5967 | return true; | |
5968 | } | |
5969 | ||
5970 | case TREE_LIST: | |
5971 | { | |
5972 | gcc_assert (TREE_PURPOSE (t) == NULL_TREE | |
5973 | || DECL_P (TREE_PURPOSE (t))); | |
5974 | if (!potential_constant_expression (TREE_VALUE (t), flags)) | |
5975 | return false; | |
5976 | if (TREE_CHAIN (t) == NULL_TREE) | |
5977 | return true; | |
5978 | return potential_constant_expression (TREE_CHAIN (t), flags); | |
5979 | } | |
5980 | ||
5981 | case TRUNC_DIV_EXPR: | |
5982 | case CEIL_DIV_EXPR: | |
5983 | case FLOOR_DIV_EXPR: | |
5984 | case ROUND_DIV_EXPR: | |
5985 | case TRUNC_MOD_EXPR: | |
5986 | case CEIL_MOD_EXPR: | |
5987 | case ROUND_MOD_EXPR: | |
5988 | if (integer_zerop (decl_constant_value (TREE_OPERAND (t, 1)))) | |
5989 | return false; | |
5990 | else | |
5991 | goto binary; | |
5992 | ||
5993 | case COMPOUND_EXPR: | |
5994 | { | |
5995 | /* check_return_expr sometimes wraps a TARGET_EXPR in a | |
5996 | COMPOUND_EXPR; don't get confused. Also handle EMPTY_CLASS_EXPR | |
5997 | introduced by build_call_a. */ | |
5998 | tree op0 = TREE_OPERAND (t, 0); | |
5999 | tree op1 = TREE_OPERAND (t, 1); | |
6000 | STRIP_NOPS (op1); | |
6001 | if ((TREE_CODE (op0) == TARGET_EXPR && op1 == TARGET_EXPR_SLOT (op0)) | |
6002 | || TREE_CODE (op1) == EMPTY_CLASS_EXPR) | |
6003 | return potential_constant_expression (op0, flags); | |
6004 | else | |
6005 | goto binary; | |
6006 | } | |
6007 | ||
6008 | /* If the first operand is the non-short-circuit constant, look at | |
6009 | the second operand; otherwise we only care about the first one for | |
6010 | potentiality. */ | |
6011 | case TRUTH_AND_EXPR: | |
6012 | case TRUTH_ANDIF_EXPR: | |
6013 | tmp = boolean_true_node; | |
6014 | goto truth; | |
6015 | case TRUTH_OR_EXPR: | |
6016 | case TRUTH_ORIF_EXPR: | |
6017 | tmp = boolean_false_node; | |
6018 | truth: | |
6019 | if (TREE_OPERAND (t, 0) == tmp) | |
6020 | return potential_constant_expression (TREE_OPERAND (t, 1), flags); | |
6021 | else | |
6022 | return potential_constant_expression (TREE_OPERAND (t, 0), flags); | |
6023 | ||
6024 | case ARRAY_REF: | |
6025 | case ARRAY_RANGE_REF: | |
6026 | case PLUS_EXPR: | |
6027 | case MULT_EXPR: | |
6028 | case POINTER_PLUS_EXPR: | |
6029 | case RDIV_EXPR: | |
6030 | case EXACT_DIV_EXPR: | |
6031 | case MIN_EXPR: | |
6032 | case MAX_EXPR: | |
6033 | case LSHIFT_EXPR: | |
6034 | case RSHIFT_EXPR: | |
6035 | case LROTATE_EXPR: | |
6036 | case RROTATE_EXPR: | |
6037 | case BIT_IOR_EXPR: | |
6038 | case BIT_XOR_EXPR: | |
6039 | case BIT_AND_EXPR: | |
6040 | case UNLT_EXPR: | |
6041 | case UNLE_EXPR: | |
6042 | case UNGT_EXPR: | |
6043 | case UNGE_EXPR: | |
6044 | case UNEQ_EXPR: | |
6045 | case RANGE_EXPR: | |
6046 | case COMPLEX_EXPR: | |
6047 | binary: | |
6048 | for (i = 0; i < 2; ++i) | |
6049 | if (!potential_constant_expression (TREE_OPERAND (t, i), | |
6050 | flags)) | |
6051 | return false; | |
6052 | return true; | |
6053 | ||
6054 | case COND_EXPR: | |
6055 | case VEC_COND_EXPR: | |
6056 | /* If the condition is a known constant, we know which of the legs we | |
6057 | care about; otherwise we only require that the condition and | |
6058 | either of the legs be potentially constant. */ | |
6059 | tmp = TREE_OPERAND (t, 0); | |
6060 | if (!potential_constant_expression (tmp, flags)) | |
6061 | return false; | |
6062 | else if (tmp == boolean_true_node) | |
6063 | return potential_constant_expression (TREE_OPERAND (t, 1), flags); | |
6064 | else if (tmp == boolean_false_node) | |
6065 | return potential_constant_expression (TREE_OPERAND (t, 2), flags); | |
6066 | for (i = 1; i < 3; ++i) | |
6067 | if (potential_constant_expression (TREE_OPERAND (t, i), tf_none)) | |
6068 | return true; | |
6069 | if (flags & tf_error) | |
6070 | error ("expression %qE is not a constant-expression", t); | |
6071 | return false; | |
6072 | ||
6073 | case VEC_INIT_EXPR: | |
6074 | /* We should only see this in a defaulted constructor for a class | |
6075 | with a non-static data member of array type; if we get here we | |
6076 | know this is a potential constant expression. */ | |
6077 | gcc_assert (DECL_DEFAULTED_FN (current_function_decl)); | |
6078 | return true; | |
6079 | ||
6080 | default: | |
6081 | sorry ("unexpected ast of kind %s", tree_code_name[TREE_CODE (t)]); | |
6082 | gcc_unreachable(); | |
6083 | return false; | |
6084 | } | |
6085 | } | |
6086 | ||
6087 | \f | |
d5f4eddd JM |
6088 | /* Constructor for a lambda expression. */ |
6089 | ||
6090 | tree | |
6091 | build_lambda_expr (void) | |
6092 | { | |
6093 | tree lambda = make_node (LAMBDA_EXPR); | |
6094 | LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda) = CPLD_NONE; | |
6095 | LAMBDA_EXPR_CAPTURE_LIST (lambda) = NULL_TREE; | |
6096 | LAMBDA_EXPR_THIS_CAPTURE (lambda) = NULL_TREE; | |
6097 | LAMBDA_EXPR_RETURN_TYPE (lambda) = NULL_TREE; | |
6098 | LAMBDA_EXPR_MUTABLE_P (lambda) = false; | |
6099 | return lambda; | |
6100 | } | |
6101 | ||
6102 | /* Create the closure object for a LAMBDA_EXPR. */ | |
6103 | ||
6104 | tree | |
6105 | build_lambda_object (tree lambda_expr) | |
6106 | { | |
6107 | /* Build aggregate constructor call. | |
6108 | - cp_parser_braced_list | |
6109 | - cp_parser_functional_cast */ | |
6110 | VEC(constructor_elt,gc) *elts = NULL; | |
6111 | tree node, expr, type; | |
6112 | location_t saved_loc; | |
6113 | ||
6114 | if (processing_template_decl) | |
6115 | return lambda_expr; | |
6116 | ||
6117 | /* Make sure any error messages refer to the lambda-introducer. */ | |
6118 | saved_loc = input_location; | |
6119 | input_location = LAMBDA_EXPR_LOCATION (lambda_expr); | |
6120 | ||
6121 | for (node = LAMBDA_EXPR_CAPTURE_LIST (lambda_expr); | |
6122 | node; | |
6123 | node = TREE_CHAIN (node)) | |
6124 | { | |
6125 | tree field = TREE_PURPOSE (node); | |
6126 | tree val = TREE_VALUE (node); | |
6127 | ||
1f4a7a48 JM |
6128 | if (DECL_P (val)) |
6129 | mark_used (val); | |
6130 | ||
d5f4eddd JM |
6131 | /* Mere mortals can't copy arrays with aggregate initialization, so |
6132 | do some magic to make it work here. */ | |
6133 | if (TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE) | |
6134 | val = build_array_copy (val); | |
37a7519a JM |
6135 | else if (DECL_NORMAL_CAPTURE_P (field) |
6136 | && TREE_CODE (TREE_TYPE (field)) != REFERENCE_TYPE) | |
6137 | { | |
6138 | /* "the entities that are captured by copy are used to | |
6139 | direct-initialize each corresponding non-static data | |
6140 | member of the resulting closure object." | |
6141 | ||
6142 | There's normally no way to express direct-initialization | |
6143 | from an element of a CONSTRUCTOR, so we build up a special | |
6144 | TARGET_EXPR to bypass the usual copy-initialization. */ | |
6145 | val = force_rvalue (val); | |
6146 | if (TREE_CODE (val) == TARGET_EXPR) | |
6147 | TARGET_EXPR_DIRECT_INIT_P (val) = true; | |
6148 | } | |
d5f4eddd JM |
6149 | |
6150 | CONSTRUCTOR_APPEND_ELT (elts, DECL_NAME (field), val); | |
6151 | } | |
6152 | ||
6153 | expr = build_constructor (init_list_type_node, elts); | |
6154 | CONSTRUCTOR_IS_DIRECT_INIT (expr) = 1; | |
6155 | ||
6156 | /* N2927: "[The closure] class type is not an aggregate." | |
6157 | But we briefly treat it as an aggregate to make this simpler. */ | |
6158 | type = TREE_TYPE (lambda_expr); | |
6159 | CLASSTYPE_NON_AGGREGATE (type) = 0; | |
6160 | expr = finish_compound_literal (type, expr); | |
6161 | CLASSTYPE_NON_AGGREGATE (type) = 1; | |
6162 | ||
6163 | input_location = saved_loc; | |
6164 | return expr; | |
6165 | } | |
6166 | ||
6167 | /* Return an initialized RECORD_TYPE for LAMBDA. | |
6168 | LAMBDA must have its explicit captures already. */ | |
6169 | ||
6170 | tree | |
6171 | begin_lambda_type (tree lambda) | |
6172 | { | |
6173 | tree type; | |
6174 | ||
6175 | { | |
6176 | /* Unique name. This is just like an unnamed class, but we cannot use | |
6177 | make_anon_name because of certain checks against TYPE_ANONYMOUS_P. */ | |
6178 | tree name; | |
6179 | name = make_lambda_name (); | |
6180 | ||
6181 | /* Create the new RECORD_TYPE for this lambda. */ | |
6182 | type = xref_tag (/*tag_code=*/record_type, | |
6183 | name, | |
6184 | /*scope=*/ts_within_enclosing_non_class, | |
6185 | /*template_header_p=*/false); | |
6186 | } | |
6187 | ||
6188 | /* Designate it as a struct so that we can use aggregate initialization. */ | |
6189 | CLASSTYPE_DECLARED_CLASS (type) = false; | |
6190 | ||
6191 | /* Clear base types. */ | |
6192 | xref_basetypes (type, /*bases=*/NULL_TREE); | |
6193 | ||
6194 | /* Start the class. */ | |
6195 | type = begin_class_definition (type, /*attributes=*/NULL_TREE); | |
6196 | ||
6197 | /* Cross-reference the expression and the type. */ | |
6198 | TREE_TYPE (lambda) = type; | |
6199 | CLASSTYPE_LAMBDA_EXPR (type) = lambda; | |
6200 | ||
6201 | return type; | |
6202 | } | |
6203 | ||
6204 | /* Returns the type to use for the return type of the operator() of a | |
6205 | closure class. */ | |
6206 | ||
6207 | tree | |
6208 | lambda_return_type (tree expr) | |
6209 | { | |
6210 | tree type; | |
95b24c84 JM |
6211 | if (BRACE_ENCLOSED_INITIALIZER_P (expr)) |
6212 | { | |
6213 | warning (0, "cannot deduce lambda return type from a braced-init-list"); | |
6214 | return void_type_node; | |
6215 | } | |
d5f4eddd JM |
6216 | if (type_dependent_expression_p (expr)) |
6217 | { | |
6218 | type = cxx_make_type (DECLTYPE_TYPE); | |
6219 | DECLTYPE_TYPE_EXPR (type) = expr; | |
6220 | DECLTYPE_FOR_LAMBDA_RETURN (type) = true; | |
6221 | SET_TYPE_STRUCTURAL_EQUALITY (type); | |
6222 | } | |
6223 | else | |
6224 | type = type_decays_to (unlowered_expr_type (expr)); | |
6225 | return type; | |
6226 | } | |
6227 | ||
6228 | /* Given a LAMBDA_EXPR or closure type LAMBDA, return the op() of the | |
6229 | closure type. */ | |
6230 | ||
6231 | tree | |
6232 | lambda_function (tree lambda) | |
6233 | { | |
6234 | tree type; | |
6235 | if (TREE_CODE (lambda) == LAMBDA_EXPR) | |
6236 | type = TREE_TYPE (lambda); | |
6237 | else | |
6238 | type = lambda; | |
6239 | gcc_assert (LAMBDA_TYPE_P (type)); | |
6240 | /* Don't let debug_tree cause instantiation. */ | |
6241 | if (CLASSTYPE_TEMPLATE_INSTANTIATION (type) && !COMPLETE_TYPE_P (type)) | |
6242 | return NULL_TREE; | |
6243 | lambda = lookup_member (type, ansi_opname (CALL_EXPR), | |
6244 | /*protect=*/0, /*want_type=*/false); | |
6245 | if (lambda) | |
6246 | lambda = BASELINK_FUNCTIONS (lambda); | |
6247 | return lambda; | |
6248 | } | |
6249 | ||
6250 | /* Returns the type to use for the FIELD_DECL corresponding to the | |
6251 | capture of EXPR. | |
6252 | The caller should add REFERENCE_TYPE for capture by reference. */ | |
6253 | ||
6254 | tree | |
6255 | lambda_capture_field_type (tree expr) | |
6256 | { | |
6257 | tree type; | |
6258 | if (type_dependent_expression_p (expr)) | |
6259 | { | |
6260 | type = cxx_make_type (DECLTYPE_TYPE); | |
6261 | DECLTYPE_TYPE_EXPR (type) = expr; | |
6262 | DECLTYPE_FOR_LAMBDA_CAPTURE (type) = true; | |
6263 | SET_TYPE_STRUCTURAL_EQUALITY (type); | |
6264 | } | |
6265 | else | |
6266 | type = non_reference (unlowered_expr_type (expr)); | |
6267 | return type; | |
6268 | } | |
6269 | ||
6270 | /* Recompute the return type for LAMBDA with body of the form: | |
6271 | { return EXPR ; } */ | |
6272 | ||
6273 | void | |
6274 | apply_lambda_return_type (tree lambda, tree return_type) | |
6275 | { | |
6276 | tree fco = lambda_function (lambda); | |
6277 | tree result; | |
6278 | ||
6279 | LAMBDA_EXPR_RETURN_TYPE (lambda) = return_type; | |
6280 | ||
6281 | /* If we got a DECLTYPE_TYPE, don't stick it in the function yet, | |
6282 | it would interfere with instantiating the closure type. */ | |
6283 | if (dependent_type_p (return_type)) | |
6284 | return; | |
6285 | if (return_type == error_mark_node) | |
6286 | return; | |
6287 | ||
6288 | /* TREE_TYPE (FUNCTION_DECL) == METHOD_TYPE | |
6289 | TREE_TYPE (METHOD_TYPE) == return-type */ | |
643d4cd6 | 6290 | TREE_TYPE (fco) = change_return_type (return_type, TREE_TYPE (fco)); |
d5f4eddd JM |
6291 | |
6292 | result = DECL_RESULT (fco); | |
6293 | if (result == NULL_TREE) | |
6294 | return; | |
6295 | ||
6296 | /* We already have a DECL_RESULT from start_preparsed_function. | |
6297 | Now we need to redo the work it and allocate_struct_function | |
6298 | did to reflect the new type. */ | |
6299 | result = build_decl (input_location, RESULT_DECL, NULL_TREE, | |
6300 | TYPE_MAIN_VARIANT (return_type)); | |
6301 | DECL_ARTIFICIAL (result) = 1; | |
6302 | DECL_IGNORED_P (result) = 1; | |
6303 | cp_apply_type_quals_to_decl (cp_type_quals (return_type), | |
6304 | result); | |
6305 | ||
6306 | DECL_RESULT (fco) = result; | |
6307 | ||
6308 | if (!processing_template_decl && aggregate_value_p (result, fco)) | |
6309 | { | |
6310 | #ifdef PCC_STATIC_STRUCT_RETURN | |
6311 | cfun->returns_pcc_struct = 1; | |
6312 | #endif | |
6313 | cfun->returns_struct = 1; | |
6314 | } | |
6315 | ||
6316 | } | |
6317 | ||
6318 | /* DECL is a local variable or parameter from the surrounding scope of a | |
6319 | lambda-expression. Returns the decltype for a use of the capture field | |
6320 | for DECL even if it hasn't been captured yet. */ | |
6321 | ||
6322 | static tree | |
6323 | capture_decltype (tree decl) | |
6324 | { | |
6325 | tree lam = CLASSTYPE_LAMBDA_EXPR (DECL_CONTEXT (current_function_decl)); | |
6326 | /* FIXME do lookup instead of list walk? */ | |
6327 | tree cap = value_member (decl, LAMBDA_EXPR_CAPTURE_LIST (lam)); | |
6328 | tree type; | |
6329 | ||
6330 | if (cap) | |
6331 | type = TREE_TYPE (TREE_PURPOSE (cap)); | |
6332 | else | |
6333 | switch (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lam)) | |
6334 | { | |
6335 | case CPLD_NONE: | |
6336 | error ("%qD is not captured", decl); | |
6337 | return error_mark_node; | |
6338 | ||
6339 | case CPLD_COPY: | |
6340 | type = TREE_TYPE (decl); | |
6341 | if (TREE_CODE (type) == REFERENCE_TYPE | |
6342 | && TREE_CODE (TREE_TYPE (type)) != FUNCTION_TYPE) | |
6343 | type = TREE_TYPE (type); | |
6344 | break; | |
6345 | ||
6346 | case CPLD_REFERENCE: | |
6347 | type = TREE_TYPE (decl); | |
6348 | if (TREE_CODE (type) != REFERENCE_TYPE) | |
6349 | type = build_reference_type (TREE_TYPE (decl)); | |
6350 | break; | |
6351 | ||
6352 | default: | |
6353 | gcc_unreachable (); | |
6354 | } | |
6355 | ||
6356 | if (TREE_CODE (type) != REFERENCE_TYPE) | |
6357 | { | |
6358 | if (!LAMBDA_EXPR_MUTABLE_P (lam)) | |
a3360e77 | 6359 | type = cp_build_qualified_type (type, (cp_type_quals (type) |
d5f4eddd JM |
6360 | |TYPE_QUAL_CONST)); |
6361 | type = build_reference_type (type); | |
6362 | } | |
6363 | return type; | |
6364 | } | |
6365 | ||
6366 | /* From an ID and INITIALIZER, create a capture (by reference if | |
6367 | BY_REFERENCE_P is true), add it to the capture-list for LAMBDA, | |
6368 | and return it. */ | |
6369 | ||
6370 | tree | |
37a7519a JM |
6371 | add_capture (tree lambda, tree id, tree initializer, bool by_reference_p, |
6372 | bool explicit_init_p) | |
d5f4eddd JM |
6373 | { |
6374 | tree type; | |
6375 | tree member; | |
6376 | ||
6377 | type = lambda_capture_field_type (initializer); | |
6378 | if (by_reference_p) | |
6379 | { | |
6380 | type = build_reference_type (type); | |
6381 | if (!real_lvalue_p (initializer)) | |
6382 | error ("cannot capture %qE by reference", initializer); | |
6383 | } | |
6384 | ||
6385 | /* Make member variable. */ | |
6386 | member = build_lang_decl (FIELD_DECL, id, type); | |
37a7519a JM |
6387 | if (!explicit_init_p) |
6388 | /* Normal captures are invisible to name lookup but uses are replaced | |
6389 | with references to the capture field; we implement this by only | |
6390 | really making them invisible in unevaluated context; see | |
6391 | qualify_lookup. For now, let's make explicitly initialized captures | |
6392 | always visible. */ | |
6393 | DECL_NORMAL_CAPTURE_P (member) = true; | |
d5f4eddd | 6394 | |
19030d77 JM |
6395 | /* Add it to the appropriate closure class if we've started it. */ |
6396 | if (current_class_type && current_class_type == TREE_TYPE (lambda)) | |
6397 | finish_member_declaration (member); | |
d5f4eddd JM |
6398 | |
6399 | LAMBDA_EXPR_CAPTURE_LIST (lambda) | |
6400 | = tree_cons (member, initializer, LAMBDA_EXPR_CAPTURE_LIST (lambda)); | |
6401 | ||
6402 | if (id == get_identifier ("__this")) | |
6403 | { | |
6404 | if (LAMBDA_EXPR_CAPTURES_THIS_P (lambda)) | |
6405 | error ("already captured %<this%> in lambda expression"); | |
6406 | LAMBDA_EXPR_THIS_CAPTURE (lambda) = member; | |
6407 | } | |
6408 | ||
6409 | return member; | |
6410 | } | |
6411 | ||
19030d77 JM |
6412 | /* Register all the capture members on the list CAPTURES, which is the |
6413 | LAMBDA_EXPR_CAPTURE_LIST for the lambda after the introducer. */ | |
6414 | ||
6415 | void register_capture_members (tree captures) | |
6416 | { | |
6417 | if (captures) | |
6418 | { | |
6419 | register_capture_members (TREE_CHAIN (captures)); | |
6420 | finish_member_declaration (TREE_PURPOSE (captures)); | |
6421 | } | |
6422 | } | |
6423 | ||
9660afe0 JM |
6424 | /* Given a FIELD_DECL decl belonging to a closure type, return a |
6425 | COMPONENT_REF of it relative to the 'this' parameter of the op() for | |
6426 | that type. */ | |
6427 | ||
6428 | static tree | |
6429 | thisify_lambda_field (tree decl) | |
6430 | { | |
6431 | tree context = lambda_function (DECL_CONTEXT (decl)); | |
6432 | tree object = cp_build_indirect_ref (DECL_ARGUMENTS (context), | |
dd865ef6 | 6433 | RO_NULL, |
9660afe0 JM |
6434 | tf_warning_or_error); |
6435 | return finish_non_static_data_member (decl, object, | |
6436 | /*qualifying_scope*/NULL_TREE); | |
6437 | } | |
6438 | ||
d5f4eddd JM |
6439 | /* Similar to add_capture, except this works on a stack of nested lambdas. |
6440 | BY_REFERENCE_P in this case is derived from the default capture mode. | |
6441 | Returns the capture for the lambda at the bottom of the stack. */ | |
6442 | ||
6443 | tree | |
6444 | add_default_capture (tree lambda_stack, tree id, tree initializer) | |
6445 | { | |
6446 | bool this_capture_p = (id == get_identifier ("__this")); | |
6447 | ||
6448 | tree member = NULL_TREE; | |
6449 | ||
6450 | tree saved_class_type = current_class_type; | |
6451 | ||
6452 | tree node; | |
6453 | ||
6454 | for (node = lambda_stack; | |
6455 | node; | |
6456 | node = TREE_CHAIN (node)) | |
6457 | { | |
6458 | tree lambda = TREE_VALUE (node); | |
6459 | ||
6460 | current_class_type = TREE_TYPE (lambda); | |
6461 | member = add_capture (lambda, | |
6462 | id, | |
6463 | initializer, | |
6464 | /*by_reference_p=*/ | |
6465 | (!this_capture_p | |
6466 | && (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda) | |
37a7519a JM |
6467 | == CPLD_REFERENCE)), |
6468 | /*explicit_init_p=*/false); | |
9660afe0 | 6469 | initializer = thisify_lambda_field (member); |
d5f4eddd JM |
6470 | } |
6471 | ||
6472 | current_class_type = saved_class_type; | |
6473 | ||
6474 | return member; | |
d5f4eddd JM |
6475 | } |
6476 | ||
6477 | /* Return the capture pertaining to a use of 'this' in LAMBDA, in the form of an | |
6478 | INDIRECT_REF, possibly adding it through default capturing. */ | |
6479 | ||
6480 | tree | |
6481 | lambda_expr_this_capture (tree lambda) | |
6482 | { | |
6483 | tree result; | |
6484 | ||
6485 | tree this_capture = LAMBDA_EXPR_THIS_CAPTURE (lambda); | |
6486 | ||
6487 | /* Try to default capture 'this' if we can. */ | |
6488 | if (!this_capture | |
6489 | && LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda) != CPLD_NONE) | |
6490 | { | |
6491 | tree containing_function = TYPE_CONTEXT (TREE_TYPE (lambda)); | |
6492 | tree lambda_stack = tree_cons (NULL_TREE, lambda, NULL_TREE); | |
71d16049 | 6493 | tree init = NULL_TREE; |
d5f4eddd JM |
6494 | |
6495 | /* If we are in a lambda function, we can move out until we hit: | |
6496 | 1. a non-lambda function, | |
6497 | 2. a lambda function capturing 'this', or | |
6498 | 3. a non-default capturing lambda function. */ | |
6499 | while (LAMBDA_FUNCTION_P (containing_function)) | |
6500 | { | |
6501 | tree lambda | |
6502 | = CLASSTYPE_LAMBDA_EXPR (DECL_CONTEXT (containing_function)); | |
6503 | ||
71d16049 JM |
6504 | if (LAMBDA_EXPR_THIS_CAPTURE (lambda)) |
6505 | { | |
6506 | /* An outer lambda has already captured 'this'. */ | |
6507 | tree cap = LAMBDA_EXPR_THIS_CAPTURE (lambda); | |
92de1b37 | 6508 | init = thisify_lambda_field (cap); |
71d16049 JM |
6509 | break; |
6510 | } | |
6511 | ||
6512 | if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda) == CPLD_NONE) | |
6513 | /* An outer lambda won't let us capture 'this'. */ | |
6514 | break; | |
d5f4eddd JM |
6515 | |
6516 | lambda_stack = tree_cons (NULL_TREE, | |
6517 | lambda, | |
6518 | lambda_stack); | |
6519 | ||
6520 | containing_function = decl_function_context (containing_function); | |
6521 | } | |
6522 | ||
71d16049 JM |
6523 | if (!init && DECL_NONSTATIC_MEMBER_FUNCTION_P (containing_function) |
6524 | && !LAMBDA_FUNCTION_P (containing_function)) | |
6525 | /* First parameter is 'this'. */ | |
6526 | init = DECL_ARGUMENTS (containing_function); | |
d5f4eddd | 6527 | |
71d16049 JM |
6528 | if (init) |
6529 | this_capture = add_default_capture (lambda_stack, | |
6530 | /*id=*/get_identifier ("__this"), | |
6531 | init); | |
d5f4eddd JM |
6532 | } |
6533 | ||
6534 | if (!this_capture) | |
6535 | { | |
6536 | error ("%<this%> was not captured for this lambda function"); | |
6537 | result = error_mark_node; | |
6538 | } | |
6539 | else | |
6540 | { | |
6541 | /* To make sure that current_class_ref is for the lambda. */ | |
6542 | gcc_assert (TYPE_MAIN_VARIANT (TREE_TYPE (current_class_ref)) == TREE_TYPE (lambda)); | |
6543 | ||
6544 | result = finish_non_static_data_member (this_capture, | |
2defb926 | 6545 | NULL_TREE, |
d5f4eddd JM |
6546 | /*qualifying_scope=*/NULL_TREE); |
6547 | ||
6548 | /* If 'this' is captured, each use of 'this' is transformed into an | |
6549 | access to the corresponding unnamed data member of the closure | |
6550 | type cast (_expr.cast_ 5.4) to the type of 'this'. [ The cast | |
6551 | ensures that the transformed expression is an rvalue. ] */ | |
6552 | result = rvalue (result); | |
6553 | } | |
6554 | ||
6555 | return result; | |
6556 | } | |
6557 | ||
a6846853 JM |
6558 | /* Returns the method basetype of the innermost non-lambda function, or |
6559 | NULL_TREE if none. */ | |
6560 | ||
6561 | tree | |
6562 | nonlambda_method_basetype (void) | |
6563 | { | |
6564 | tree fn, type; | |
6565 | if (!current_class_ref) | |
6566 | return NULL_TREE; | |
6567 | ||
6568 | type = current_class_type; | |
6569 | if (!LAMBDA_TYPE_P (type)) | |
6570 | return type; | |
6571 | ||
6572 | /* Find the nearest enclosing non-lambda function. */ | |
6573 | fn = TYPE_NAME (type); | |
6574 | do | |
6575 | fn = decl_function_context (fn); | |
6576 | while (fn && LAMBDA_FUNCTION_P (fn)); | |
6577 | ||
6578 | if (!fn || !DECL_NONSTATIC_MEMBER_FUNCTION_P (fn)) | |
6579 | return NULL_TREE; | |
6580 | ||
6581 | return TYPE_METHOD_BASETYPE (TREE_TYPE (fn)); | |
6582 | } | |
6583 | ||
b77068f2 JM |
6584 | /* If the closure TYPE has a static op(), also add a conversion to function |
6585 | pointer. */ | |
6586 | ||
6587 | void | |
6588 | maybe_add_lambda_conv_op (tree type) | |
6589 | { | |
6590 | bool nested = (current_function_decl != NULL_TREE); | |
6591 | tree callop = lambda_function (type); | |
6592 | tree rettype, name, fntype, fn, body, compound_stmt; | |
c6be04ad JM |
6593 | tree thistype, stattype, statfn, convfn, call, arg; |
6594 | VEC (tree, gc) *argvec; | |
b77068f2 | 6595 | |
c6be04ad | 6596 | if (LAMBDA_EXPR_CAPTURE_LIST (CLASSTYPE_LAMBDA_EXPR (type)) != NULL_TREE) |
b77068f2 JM |
6597 | return; |
6598 | ||
c6be04ad JM |
6599 | stattype = build_function_type (TREE_TYPE (TREE_TYPE (callop)), |
6600 | FUNCTION_ARG_CHAIN (callop)); | |
6601 | ||
6602 | /* First build up the conversion op. */ | |
6603 | ||
6604 | rettype = build_pointer_type (stattype); | |
b77068f2 | 6605 | name = mangle_conv_op_name_for_type (rettype); |
c6be04ad JM |
6606 | thistype = cp_build_qualified_type (type, TYPE_QUAL_CONST); |
6607 | fntype = build_method_type_directly (thistype, rettype, void_list_node); | |
6608 | fn = convfn = build_lang_decl (FUNCTION_DECL, name, fntype); | |
b77068f2 JM |
6609 | DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (callop); |
6610 | ||
6611 | if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn | |
6612 | && DECL_ALIGN (fn) < 2 * BITS_PER_UNIT) | |
6613 | DECL_ALIGN (fn) = 2 * BITS_PER_UNIT; | |
6614 | ||
6615 | SET_OVERLOADED_OPERATOR_CODE (fn, TYPE_EXPR); | |
6616 | grokclassfn (type, fn, NO_SPECIAL); | |
6617 | set_linkage_according_to_type (type, fn); | |
6618 | rest_of_decl_compilation (fn, toplevel_bindings_p (), at_eof); | |
6619 | DECL_IN_AGGR_P (fn) = 1; | |
6620 | DECL_ARTIFICIAL (fn) = 1; | |
6621 | DECL_NOT_REALLY_EXTERN (fn) = 1; | |
6622 | DECL_DECLARED_INLINE_P (fn) = 1; | |
c6be04ad JM |
6623 | DECL_ARGUMENTS (fn) = build_this_parm (fntype, TYPE_QUAL_CONST); |
6624 | if (nested) | |
6625 | DECL_INTERFACE_KNOWN (fn) = 1; | |
6626 | ||
6627 | add_method (type, fn, NULL_TREE); | |
6628 | ||
6629 | /* Generic thunk code fails for varargs; we'll complain in mark_used if | |
6630 | the conversion op is used. */ | |
6631 | if (varargs_function_p (callop)) | |
6632 | { | |
6633 | DECL_DELETED_FN (fn) = 1; | |
6634 | return; | |
6635 | } | |
6636 | ||
6637 | /* Now build up the thunk to be returned. */ | |
6638 | ||
6639 | name = get_identifier ("_FUN"); | |
6640 | fn = statfn = build_lang_decl (FUNCTION_DECL, name, stattype); | |
6641 | DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (callop); | |
6642 | if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn | |
6643 | && DECL_ALIGN (fn) < 2 * BITS_PER_UNIT) | |
6644 | DECL_ALIGN (fn) = 2 * BITS_PER_UNIT; | |
6645 | grokclassfn (type, fn, NO_SPECIAL); | |
6646 | set_linkage_according_to_type (type, fn); | |
6647 | rest_of_decl_compilation (fn, toplevel_bindings_p (), at_eof); | |
6648 | DECL_IN_AGGR_P (fn) = 1; | |
6649 | DECL_ARTIFICIAL (fn) = 1; | |
6650 | DECL_NOT_REALLY_EXTERN (fn) = 1; | |
6651 | DECL_DECLARED_INLINE_P (fn) = 1; | |
b77068f2 | 6652 | DECL_STATIC_FUNCTION_P (fn) = 1; |
910ad8de NF |
6653 | DECL_ARGUMENTS (fn) = copy_list (DECL_CHAIN (DECL_ARGUMENTS (callop))); |
6654 | for (arg = DECL_ARGUMENTS (fn); arg; arg = DECL_CHAIN (arg)) | |
c6be04ad | 6655 | DECL_CONTEXT (arg) = fn; |
7a79ff3b JM |
6656 | if (nested) |
6657 | DECL_INTERFACE_KNOWN (fn) = 1; | |
b77068f2 JM |
6658 | |
6659 | add_method (type, fn, NULL_TREE); | |
6660 | ||
6661 | if (nested) | |
6662 | push_function_context (); | |
c6be04ad JM |
6663 | |
6664 | /* Generate the body of the thunk. */ | |
6665 | ||
6666 | start_preparsed_function (statfn, NULL_TREE, | |
6667 | SF_PRE_PARSED | SF_INCLASS_INLINE); | |
6668 | if (DECL_ONE_ONLY (statfn)) | |
6669 | { | |
6670 | /* Put the thunk in the same comdat group as the call op. */ | |
6671 | struct cgraph_node *callop_node, *thunk_node; | |
6672 | DECL_COMDAT_GROUP (statfn) = DECL_COMDAT_GROUP (callop); | |
6673 | callop_node = cgraph_node (callop); | |
6674 | thunk_node = cgraph_node (statfn); | |
6675 | gcc_assert (callop_node->same_comdat_group == NULL); | |
6676 | gcc_assert (thunk_node->same_comdat_group == NULL); | |
6677 | callop_node->same_comdat_group = thunk_node; | |
6678 | thunk_node->same_comdat_group = callop_node; | |
6679 | } | |
6680 | body = begin_function_body (); | |
6681 | compound_stmt = begin_compound_stmt (0); | |
6682 | ||
9542943d JM |
6683 | arg = build1 (NOP_EXPR, TREE_TYPE (DECL_ARGUMENTS (callop)), |
6684 | null_pointer_node); | |
c6be04ad JM |
6685 | argvec = make_tree_vector (); |
6686 | VEC_quick_push (tree, argvec, arg); | |
910ad8de | 6687 | for (arg = DECL_ARGUMENTS (statfn); arg; arg = DECL_CHAIN (arg)) |
c6be04ad | 6688 | VEC_safe_push (tree, gc, argvec, arg); |
e62e4922 JM |
6689 | call = build_call_a (callop, VEC_length (tree, argvec), |
6690 | VEC_address (tree, argvec)); | |
c6be04ad | 6691 | CALL_FROM_THUNK_P (call) = 1; |
e62e4922 JM |
6692 | if (MAYBE_CLASS_TYPE_P (TREE_TYPE (call))) |
6693 | call = build_cplus_new (TREE_TYPE (call), call); | |
6694 | call = convert_from_reference (call); | |
c6be04ad JM |
6695 | finish_return_stmt (call); |
6696 | ||
6697 | finish_compound_stmt (compound_stmt); | |
6698 | finish_function_body (body); | |
6699 | ||
6700 | expand_or_defer_fn (finish_function (2)); | |
6701 | ||
6702 | /* Generate the body of the conversion op. */ | |
6703 | ||
6704 | start_preparsed_function (convfn, NULL_TREE, | |
b77068f2 JM |
6705 | SF_PRE_PARSED | SF_INCLASS_INLINE); |
6706 | body = begin_function_body (); | |
6707 | compound_stmt = begin_compound_stmt (0); | |
6708 | ||
c6be04ad | 6709 | finish_return_stmt (decay_conversion (statfn)); |
b77068f2 JM |
6710 | |
6711 | finish_compound_stmt (compound_stmt); | |
6712 | finish_function_body (body); | |
6713 | ||
6714 | expand_or_defer_fn (finish_function (2)); | |
c6be04ad | 6715 | |
b77068f2 JM |
6716 | if (nested) |
6717 | pop_function_context (); | |
6718 | } | |
cf22909c | 6719 | #include "gt-cp-semantics.h" |