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Commit | Line | Data |
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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 | |
23a5b65a | 6 | Copyright (C) 1998-2014 Free Software Foundation, Inc. |
ad321293 | 7 | Written by Mark Mitchell (mmitchell@usa.net) based on code found |
c8094d83 | 8 | formerly in parse.y and pt.c. |
ad321293 | 9 | |
f5adbb8d | 10 | This file is part of GCC. |
ad321293 | 11 | |
f5adbb8d | 12 | GCC is free software; you can redistribute it and/or modify it |
ad321293 | 13 | under the terms of the GNU General Public License as published by |
e77f031d | 14 | the Free Software Foundation; either version 3, or (at your option) |
ad321293 | 15 | any later version. |
c8094d83 | 16 | |
f5adbb8d | 17 | GCC is distributed in the hope that it will be useful, but |
ad321293 MM |
18 | WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | General Public License for more details. | |
c8094d83 | 21 | |
e77f031d NC |
22 | You should have received a copy of the GNU General Public License |
23 | along with GCC; see the file COPYING3. If not see | |
24 | <http://www.gnu.org/licenses/>. */ | |
ad321293 MM |
25 | |
26 | #include "config.h" | |
8d052bc7 | 27 | #include "system.h" |
4977bab6 ZW |
28 | #include "coretypes.h" |
29 | #include "tm.h" | |
ad321293 | 30 | #include "tree.h" |
d8a2d370 DN |
31 | #include "stmt.h" |
32 | #include "varasm.h" | |
33 | #include "stor-layout.h" | |
34 | #include "stringpool.h" | |
ad321293 | 35 | #include "cp-tree.h" |
39dabefd | 36 | #include "c-family/c-common.h" |
61d3ce20 | 37 | #include "c-family/c-objc.h" |
25af8512 | 38 | #include "tree-inline.h" |
9b6ab3c0 | 39 | #include "intl.h" |
12027a89 | 40 | #include "toplev.h" |
84df082b | 41 | #include "flags.h" |
ea11ca7e | 42 | #include "timevar.h" |
6de9cd9a | 43 | #include "diagnostic.h" |
8cd2462c | 44 | #include "cgraph.h" |
325c3691 | 45 | #include "tree-iterator.h" |
44d10c10 | 46 | #include "target.h" |
2fb9a547 | 47 | #include "hash-table.h" |
45b0be94 | 48 | #include "gimplify.h" |
7a8cba34 | 49 | #include "bitmap.h" |
0645c1a2 | 50 | #include "omp-low.h" |
9b2b7279 | 51 | #include "builtins.h" |
ad321293 | 52 | |
3da2b176 AH |
53 | static bool verify_constant (tree, bool, bool *, bool *); |
54 | #define VERIFY_CONSTANT(X) \ | |
55 | do { \ | |
56 | if (verify_constant ((X), allow_non_constant, non_constant_p, overflow_p)) \ | |
57 | return t; \ | |
58 | } while (0) | |
59 | ||
ad321293 MM |
60 | /* There routines provide a modular interface to perform many parsing |
61 | operations. They may therefore be used during actual parsing, or | |
62 | during template instantiation, which may be regarded as a | |
0b4d5576 | 63 | degenerate form of parsing. */ |
ad321293 | 64 | |
3a978d72 | 65 | static tree maybe_convert_cond (tree); |
6de9cd9a | 66 | static tree finalize_nrv_r (tree *, int *, void *); |
d5f4eddd | 67 | static tree capture_decltype (tree); |
4985cde3 | 68 | |
558475f0 | 69 | |
8d241e0b KL |
70 | /* Deferred Access Checking Overview |
71 | --------------------------------- | |
72 | ||
73 | Most C++ expressions and declarations require access checking | |
74 | to be performed during parsing. However, in several cases, | |
75 | this has to be treated differently. | |
76 | ||
77 | For member declarations, access checking has to be deferred | |
78 | until more information about the declaration is known. For | |
79 | example: | |
80 | ||
81 | class A { | |
0cbd7506 | 82 | typedef int X; |
8d241e0b | 83 | public: |
0cbd7506 | 84 | X f(); |
8d241e0b KL |
85 | }; |
86 | ||
87 | A::X A::f(); | |
88 | A::X g(); | |
89 | ||
90 | When we are parsing the function return type `A::X', we don't | |
91 | really know if this is allowed until we parse the function name. | |
92 | ||
93 | Furthermore, some contexts require that access checking is | |
94 | never performed at all. These include class heads, and template | |
95 | instantiations. | |
96 | ||
97 | Typical use of access checking functions is described here: | |
c8094d83 | 98 | |
8d241e0b KL |
99 | 1. When we enter a context that requires certain access checking |
100 | mode, the function `push_deferring_access_checks' is called with | |
101 | DEFERRING argument specifying the desired mode. Access checking | |
102 | may be performed immediately (dk_no_deferred), deferred | |
103 | (dk_deferred), or not performed (dk_no_check). | |
104 | ||
105 | 2. When a declaration such as a type, or a variable, is encountered, | |
106 | the function `perform_or_defer_access_check' is called. It | |
9771b263 | 107 | maintains a vector of all deferred checks. |
8d241e0b KL |
108 | |
109 | 3. The global `current_class_type' or `current_function_decl' is then | |
110 | setup by the parser. `enforce_access' relies on these information | |
111 | to check access. | |
112 | ||
113 | 4. Upon exiting the context mentioned in step 1, | |
114 | `perform_deferred_access_checks' is called to check all declaration | |
9771b263 | 115 | stored in the vector. `pop_deferring_access_checks' is then |
8d241e0b KL |
116 | called to restore the previous access checking mode. |
117 | ||
118 | In case of parsing error, we simply call `pop_deferring_access_checks' | |
119 | without `perform_deferred_access_checks'. */ | |
120 | ||
d1b38208 | 121 | typedef struct GTY(()) deferred_access { |
9771b263 | 122 | /* A vector representing name-lookups for which we have deferred |
3e1f1ba5 NS |
123 | checking access controls. We cannot check the accessibility of |
124 | names used in a decl-specifier-seq until we know what is being | |
125 | declared because code like: | |
126 | ||
c8094d83 | 127 | class A { |
0cbd7506 MS |
128 | class B {}; |
129 | B* f(); | |
3e1f1ba5 NS |
130 | } |
131 | ||
132 | A::B* A::f() { return 0; } | |
133 | ||
d6b418fa | 134 | is valid, even though `A::B' is not generally accessible. */ |
9771b263 | 135 | vec<deferred_access_check, va_gc> * GTY(()) deferred_access_checks; |
c8094d83 | 136 | |
3e1f1ba5 NS |
137 | /* The current mode of access checks. */ |
138 | enum deferring_kind deferring_access_checks_kind; | |
c8094d83 | 139 | |
3e1f1ba5 | 140 | } deferred_access; |
3e1f1ba5 | 141 | |
cf22909c | 142 | /* Data for deferred access checking. */ |
9771b263 | 143 | static GTY(()) vec<deferred_access, va_gc> *deferred_access_stack; |
3e1f1ba5 | 144 | static GTY(()) unsigned deferred_access_no_check; |
cf22909c KL |
145 | |
146 | /* Save the current deferred access states and start deferred | |
147 | access checking iff DEFER_P is true. */ | |
148 | ||
572c2b17 AP |
149 | void |
150 | push_deferring_access_checks (deferring_kind deferring) | |
cf22909c | 151 | { |
78757caa KL |
152 | /* For context like template instantiation, access checking |
153 | disabling applies to all nested context. */ | |
3e1f1ba5 NS |
154 | if (deferred_access_no_check || deferring == dk_no_check) |
155 | deferred_access_no_check++; | |
cf22909c | 156 | else |
3e1f1ba5 | 157 | { |
f32682ca | 158 | deferred_access e = {NULL, deferring}; |
9771b263 | 159 | vec_safe_push (deferred_access_stack, e); |
3e1f1ba5 | 160 | } |
cf22909c KL |
161 | } |
162 | ||
0ef08a81 JM |
163 | /* Save the current deferred access states and start deferred access |
164 | checking, continuing the set of deferred checks in CHECKS. */ | |
165 | ||
166 | void | |
167 | reopen_deferring_access_checks (vec<deferred_access_check, va_gc> * checks) | |
168 | { | |
169 | push_deferring_access_checks (dk_deferred); | |
170 | if (!deferred_access_no_check) | |
171 | deferred_access_stack->last().deferred_access_checks = checks; | |
172 | } | |
173 | ||
cf22909c KL |
174 | /* Resume deferring access checks again after we stopped doing |
175 | this previously. */ | |
176 | ||
572c2b17 AP |
177 | void |
178 | resume_deferring_access_checks (void) | |
cf22909c | 179 | { |
3e1f1ba5 | 180 | if (!deferred_access_no_check) |
9771b263 | 181 | deferred_access_stack->last().deferring_access_checks_kind = dk_deferred; |
cf22909c KL |
182 | } |
183 | ||
184 | /* Stop deferring access checks. */ | |
185 | ||
572c2b17 AP |
186 | void |
187 | stop_deferring_access_checks (void) | |
cf22909c | 188 | { |
3e1f1ba5 | 189 | if (!deferred_access_no_check) |
9771b263 | 190 | deferred_access_stack->last().deferring_access_checks_kind = dk_no_deferred; |
cf22909c KL |
191 | } |
192 | ||
193 | /* Discard the current deferred access checks and restore the | |
194 | previous states. */ | |
195 | ||
572c2b17 AP |
196 | void |
197 | pop_deferring_access_checks (void) | |
cf22909c | 198 | { |
3e1f1ba5 NS |
199 | if (deferred_access_no_check) |
200 | deferred_access_no_check--; | |
201 | else | |
9771b263 | 202 | deferred_access_stack->pop (); |
cf22909c KL |
203 | } |
204 | ||
c8094d83 MS |
205 | /* Returns a TREE_LIST representing the deferred checks. |
206 | The TREE_PURPOSE of each node is the type through which the | |
cf22909c KL |
207 | access occurred; the TREE_VALUE is the declaration named. |
208 | */ | |
209 | ||
9771b263 | 210 | vec<deferred_access_check, va_gc> * |
572c2b17 | 211 | get_deferred_access_checks (void) |
cf22909c | 212 | { |
3e1f1ba5 NS |
213 | if (deferred_access_no_check) |
214 | return NULL; | |
215 | else | |
9771b263 | 216 | return (deferred_access_stack->last().deferred_access_checks); |
cf22909c KL |
217 | } |
218 | ||
219 | /* Take current deferred checks and combine with the | |
220 | previous states if we also defer checks previously. | |
221 | Otherwise perform checks now. */ | |
222 | ||
572c2b17 AP |
223 | void |
224 | pop_to_parent_deferring_access_checks (void) | |
cf22909c | 225 | { |
3e1f1ba5 NS |
226 | if (deferred_access_no_check) |
227 | deferred_access_no_check--; | |
228 | else | |
229 | { | |
9771b263 | 230 | vec<deferred_access_check, va_gc> *checks; |
3e1f1ba5 NS |
231 | deferred_access *ptr; |
232 | ||
9771b263 | 233 | checks = (deferred_access_stack->last ().deferred_access_checks); |
3e1f1ba5 | 234 | |
9771b263 DN |
235 | deferred_access_stack->pop (); |
236 | ptr = &deferred_access_stack->last (); | |
3e1f1ba5 NS |
237 | if (ptr->deferring_access_checks_kind == dk_no_deferred) |
238 | { | |
239 | /* Check access. */ | |
0e69fdf0 | 240 | perform_access_checks (checks, tf_warning_or_error); |
3e1f1ba5 NS |
241 | } |
242 | else | |
243 | { | |
244 | /* Merge with parent. */ | |
d6b418fa SM |
245 | int i, j; |
246 | deferred_access_check *chk, *probe; | |
c8094d83 | 247 | |
9771b263 | 248 | FOR_EACH_VEC_SAFE_ELT (checks, i, chk) |
3e1f1ba5 | 249 | { |
9771b263 | 250 | FOR_EACH_VEC_SAFE_ELT (ptr->deferred_access_checks, j, probe) |
d6b418fa SM |
251 | { |
252 | if (probe->binfo == chk->binfo && | |
253 | probe->decl == chk->decl && | |
254 | probe->diag_decl == chk->diag_decl) | |
255 | goto found; | |
256 | } | |
3e1f1ba5 | 257 | /* Insert into parent's checks. */ |
9771b263 | 258 | vec_safe_push (ptr->deferred_access_checks, *chk); |
3e1f1ba5 NS |
259 | found:; |
260 | } | |
261 | } | |
262 | } | |
cf22909c KL |
263 | } |
264 | ||
6b648482 MM |
265 | /* Perform the access checks in CHECKS. The TREE_PURPOSE of each node |
266 | is the BINFO indicating the qualifying scope used to access the | |
0e69fdf0 PC |
267 | DECL node stored in the TREE_VALUE of the node. If CHECKS is empty |
268 | or we aren't in SFINAE context or all the checks succeed return TRUE, | |
269 | otherwise FALSE. */ | |
6b648482 | 270 | |
0e69fdf0 | 271 | bool |
9771b263 | 272 | perform_access_checks (vec<deferred_access_check, va_gc> *checks, |
0e69fdf0 | 273 | tsubst_flags_t complain) |
6b648482 | 274 | { |
d6b418fa SM |
275 | int i; |
276 | deferred_access_check *chk; | |
b3ff651a | 277 | location_t loc = input_location; |
0e69fdf0 | 278 | bool ok = true; |
d6b418fa SM |
279 | |
280 | if (!checks) | |
0e69fdf0 | 281 | return true; |
d6b418fa | 282 | |
9771b263 | 283 | FOR_EACH_VEC_SAFE_ELT (checks, i, chk) |
b3ff651a JM |
284 | { |
285 | input_location = chk->loc; | |
0e69fdf0 | 286 | ok &= enforce_access (chk->binfo, chk->decl, chk->diag_decl, complain); |
b3ff651a JM |
287 | } |
288 | ||
289 | input_location = loc; | |
0e69fdf0 | 290 | return (complain & tf_error) ? true : ok; |
6b648482 MM |
291 | } |
292 | ||
25903d03 KL |
293 | /* Perform the deferred access checks. |
294 | ||
295 | After performing the checks, we still have to keep the list | |
296 | `deferred_access_stack->deferred_access_checks' since we may want | |
297 | to check access for them again later in a different context. | |
298 | For example: | |
299 | ||
300 | class A { | |
301 | typedef int X; | |
302 | static X a; | |
303 | }; | |
304 | A::X A::a, x; // No error for `A::a', error for `x' | |
305 | ||
306 | We have to perform deferred access of `A::X', first with `A::a', | |
0e69fdf0 | 307 | next with `x'. Return value like perform_access_checks above. */ |
cf22909c | 308 | |
0e69fdf0 PC |
309 | bool |
310 | perform_deferred_access_checks (tsubst_flags_t complain) | |
cf22909c | 311 | { |
0e69fdf0 | 312 | return perform_access_checks (get_deferred_access_checks (), complain); |
cf22909c KL |
313 | } |
314 | ||
315 | /* Defer checking the accessibility of DECL, when looked up in | |
0e69fdf0 PC |
316 | BINFO. DIAG_DECL is the declaration to use to print diagnostics. |
317 | Return value like perform_access_checks above. */ | |
cf22909c | 318 | |
0e69fdf0 PC |
319 | bool |
320 | perform_or_defer_access_check (tree binfo, tree decl, tree diag_decl, | |
321 | tsubst_flags_t complain) | |
cf22909c | 322 | { |
d6b418fa | 323 | int i; |
3e1f1ba5 | 324 | deferred_access *ptr; |
d6b418fa | 325 | deferred_access_check *chk; |
d6b418fa | 326 | |
cf22909c | 327 | |
3e1f1ba5 NS |
328 | /* Exit if we are in a context that no access checking is performed. |
329 | */ | |
330 | if (deferred_access_no_check) | |
0e69fdf0 | 331 | return true; |
c8094d83 | 332 | |
50bc768d | 333 | gcc_assert (TREE_CODE (binfo) == TREE_BINFO); |
0f2a66c9 | 334 | |
9771b263 | 335 | ptr = &deferred_access_stack->last (); |
c8094d83 | 336 | |
cf22909c | 337 | /* If we are not supposed to defer access checks, just check now. */ |
3e1f1ba5 | 338 | if (ptr->deferring_access_checks_kind == dk_no_deferred) |
cf22909c | 339 | { |
0e69fdf0 PC |
340 | bool ok = enforce_access (binfo, decl, diag_decl, complain); |
341 | return (complain & tf_error) ? true : ok; | |
cf22909c | 342 | } |
c8094d83 | 343 | |
cf22909c | 344 | /* See if we are already going to perform this check. */ |
9771b263 | 345 | FOR_EACH_VEC_SAFE_ELT (ptr->deferred_access_checks, i, chk) |
d6b418fa SM |
346 | { |
347 | if (chk->decl == decl && chk->binfo == binfo && | |
348 | chk->diag_decl == diag_decl) | |
349 | { | |
0e69fdf0 | 350 | return true; |
d6b418fa SM |
351 | } |
352 | } | |
cf22909c | 353 | /* If not, record the check. */ |
f32682ca | 354 | deferred_access_check new_access = {binfo, decl, diag_decl, input_location}; |
9771b263 | 355 | vec_safe_push (ptr->deferred_access_checks, new_access); |
f7d042e2 JM |
356 | |
357 | return true; | |
358 | } | |
359 | ||
838dfd8a | 360 | /* Returns nonzero if the current statement is a full expression, |
f2c5f623 BC |
361 | i.e. temporaries created during that statement should be destroyed |
362 | at the end of the statement. */ | |
35b1567d | 363 | |
f2c5f623 | 364 | int |
3a978d72 | 365 | stmts_are_full_exprs_p (void) |
f2c5f623 | 366 | { |
ae499cce MM |
367 | return current_stmt_tree ()->stmts_are_full_exprs_p; |
368 | } | |
369 | ||
ed3d0b14 ILT |
370 | /* T is a statement. Add it to the statement-tree. This is the C++ |
371 | version. The C/ObjC frontends have a slightly different version of | |
372 | this function. */ | |
373 | ||
374 | tree | |
375 | add_stmt (tree t) | |
376 | { | |
377 | enum tree_code code = TREE_CODE (t); | |
378 | ||
379 | if (EXPR_P (t) && code != LABEL_EXPR) | |
380 | { | |
381 | if (!EXPR_HAS_LOCATION (t)) | |
382 | SET_EXPR_LOCATION (t, input_location); | |
383 | ||
384 | /* When we expand a statement-tree, we must know whether or not the | |
385 | statements are full-expressions. We record that fact here. */ | |
386 | STMT_IS_FULL_EXPR_P (t) = stmts_are_full_exprs_p (); | |
387 | } | |
388 | ||
0450fc0b PP |
389 | if (code == LABEL_EXPR || code == CASE_LABEL_EXPR) |
390 | STATEMENT_LIST_HAS_LABEL (cur_stmt_list) = 1; | |
391 | ||
ed3d0b14 ILT |
392 | /* Add T to the statement-tree. Non-side-effect statements need to be |
393 | recorded during statement expressions. */ | |
9771b263 | 394 | gcc_checking_assert (!stmt_list_stack->is_empty ()); |
ed3d0b14 ILT |
395 | append_to_statement_list_force (t, &cur_stmt_list); |
396 | ||
397 | return t; | |
398 | } | |
399 | ||
e8924938 | 400 | /* Returns the stmt_tree to which statements are currently being added. */ |
ae499cce MM |
401 | |
402 | stmt_tree | |
3a978d72 | 403 | current_stmt_tree (void) |
ae499cce | 404 | { |
c8094d83 MS |
405 | return (cfun |
406 | ? &cfun->language->base.x_stmt_tree | |
ae499cce | 407 | : &scope_chain->x_stmt_tree); |
f2c5f623 | 408 | } |
35b1567d | 409 | |
543a0daa RH |
410 | /* If statements are full expressions, wrap STMT in a CLEANUP_POINT_EXPR. */ |
411 | ||
412 | static tree | |
413 | maybe_cleanup_point_expr (tree expr) | |
414 | { | |
415 | if (!processing_template_decl && stmts_are_full_exprs_p ()) | |
0ad28dde | 416 | expr = fold_build_cleanup_point_expr (TREE_TYPE (expr), expr); |
543a0daa RH |
417 | return expr; |
418 | } | |
419 | ||
0ad28dde | 420 | /* Like maybe_cleanup_point_expr except have the type of the new expression be |
22423a1f KH |
421 | void so we don't need to create a temporary variable to hold the inner |
422 | expression. The reason why we do this is because the original type might be | |
423 | an aggregate and we cannot create a temporary variable for that type. */ | |
0ad28dde | 424 | |
14a3430e | 425 | tree |
0ad28dde AP |
426 | maybe_cleanup_point_expr_void (tree expr) |
427 | { | |
428 | if (!processing_template_decl && stmts_are_full_exprs_p ()) | |
429 | expr = fold_build_cleanup_point_expr (void_type_node, expr); | |
430 | return expr; | |
431 | } | |
432 | ||
433 | ||
434 | ||
543a0daa RH |
435 | /* Create a declaration statement for the declaration given by the DECL. */ |
436 | ||
437 | void | |
350fae66 | 438 | add_decl_expr (tree decl) |
543a0daa | 439 | { |
c2255bc4 | 440 | tree r = build_stmt (input_location, DECL_EXPR, decl); |
b187901e AP |
441 | if (DECL_INITIAL (decl) |
442 | || (DECL_SIZE (decl) && TREE_SIDE_EFFECTS (DECL_SIZE (decl)))) | |
0ad28dde | 443 | r = maybe_cleanup_point_expr_void (r); |
543a0daa RH |
444 | add_stmt (r); |
445 | } | |
446 | ||
f2c5f623 | 447 | /* Finish a scope. */ |
35b1567d | 448 | |
20aff0b3 | 449 | tree |
325c3691 | 450 | do_poplevel (tree stmt_list) |
35b1567d | 451 | { |
325c3691 | 452 | tree block = NULL; |
35b1567d | 453 | |
f2c5f623 | 454 | if (stmts_are_full_exprs_p ()) |
325c3691 | 455 | block = poplevel (kept_level_p (), 1, 0); |
f2c5f623 | 456 | |
325c3691 | 457 | stmt_list = pop_stmt_list (stmt_list); |
c8094d83 | 458 | |
325c3691 RH |
459 | if (!processing_template_decl) |
460 | { | |
c2255bc4 | 461 | stmt_list = c_build_bind_expr (input_location, block, stmt_list); |
325c3691 | 462 | /* ??? See c_end_compound_stmt re statement expressions. */ |
35b1567d BC |
463 | } |
464 | ||
325c3691 | 465 | return stmt_list; |
35b1567d BC |
466 | } |
467 | ||
c8094d83 | 468 | /* Begin a new scope. */ |
35b1567d | 469 | |
325c3691 | 470 | static tree |
92bc1323 | 471 | do_pushlevel (scope_kind sk) |
35b1567d | 472 | { |
325c3691 | 473 | tree ret = push_stmt_list (); |
f2c5f623 | 474 | if (stmts_are_full_exprs_p ()) |
325c3691 RH |
475 | begin_scope (sk, NULL); |
476 | return ret; | |
477 | } | |
5a508662 RH |
478 | |
479 | /* Queue a cleanup. CLEANUP is an expression/statement to be executed | |
480 | when the current scope is exited. EH_ONLY is true when this is not | |
481 | meant to apply to normal control flow transfer. */ | |
482 | ||
483 | void | |
484 | push_cleanup (tree decl, tree cleanup, bool eh_only) | |
485 | { | |
c2255bc4 | 486 | tree stmt = build_stmt (input_location, CLEANUP_STMT, NULL, cleanup, decl); |
5a508662 RH |
487 | CLEANUP_EH_ONLY (stmt) = eh_only; |
488 | add_stmt (stmt); | |
489 | CLEANUP_BODY (stmt) = push_stmt_list (); | |
490 | } | |
325c3691 | 491 | |
20f18c3c JM |
492 | /* Simple infinite loop tracking for -Wreturn-type. We keep a stack of all |
493 | the current loops, represented by 'NULL_TREE' if we've seen a possible | |
494 | exit, and 'error_mark_node' if not. This is currently used only to | |
495 | suppress the warning about a function with no return statements, and | |
496 | therefore we don't bother noting returns as possible exits. We also | |
497 | don't bother with gotos. */ | |
498 | ||
499 | static void | |
500 | begin_maybe_infinite_loop (tree cond) | |
501 | { | |
502 | /* Only track this while parsing a function, not during instantiation. */ | |
503 | if (!cfun || (DECL_TEMPLATE_INSTANTIATION (current_function_decl) | |
504 | && !processing_template_decl)) | |
505 | return; | |
506 | bool maybe_infinite = true; | |
507 | if (cond) | |
508 | { | |
fe96264f | 509 | cond = fold_non_dependent_expr_sfinae (cond, tf_none); |
20f18c3c JM |
510 | cond = maybe_constant_value (cond); |
511 | maybe_infinite = integer_nonzerop (cond); | |
512 | } | |
513 | vec_safe_push (cp_function_chain->infinite_loops, | |
514 | maybe_infinite ? error_mark_node : NULL_TREE); | |
515 | ||
516 | } | |
517 | ||
518 | /* A break is a possible exit for the current loop. */ | |
519 | ||
520 | void | |
521 | break_maybe_infinite_loop (void) | |
522 | { | |
523 | if (!cfun) | |
524 | return; | |
525 | cp_function_chain->infinite_loops->last() = NULL_TREE; | |
526 | } | |
527 | ||
528 | /* If we reach the end of the loop without seeing a possible exit, we have | |
529 | an infinite loop. */ | |
530 | ||
531 | static void | |
532 | end_maybe_infinite_loop (tree cond) | |
533 | { | |
534 | if (!cfun || (DECL_TEMPLATE_INSTANTIATION (current_function_decl) | |
535 | && !processing_template_decl)) | |
536 | return; | |
537 | tree current = cp_function_chain->infinite_loops->pop(); | |
538 | if (current != NULL_TREE) | |
539 | { | |
540 | cond = fold_non_dependent_expr (cond); | |
541 | cond = maybe_constant_value (cond); | |
542 | if (integer_nonzerop (cond)) | |
543 | current_function_infinite_loop = 1; | |
544 | } | |
545 | } | |
546 | ||
547 | ||
caf2523d RH |
548 | /* Begin a conditional that might contain a declaration. When generating |
549 | normal code, we want the declaration to appear before the statement | |
550 | containing the conditional. When generating template code, we want the | |
350fae66 | 551 | conditional to be rendered as the raw DECL_EXPR. */ |
325c3691 RH |
552 | |
553 | static void | |
caf2523d | 554 | begin_cond (tree *cond_p) |
325c3691 | 555 | { |
caf2523d RH |
556 | if (processing_template_decl) |
557 | *cond_p = push_stmt_list (); | |
558 | } | |
559 | ||
560 | /* Finish such a conditional. */ | |
561 | ||
562 | static void | |
563 | finish_cond (tree *cond_p, tree expr) | |
564 | { | |
565 | if (processing_template_decl) | |
35b1567d | 566 | { |
caf2523d | 567 | tree cond = pop_stmt_list (*cond_p); |
5d80a306 | 568 | |
fdaf2f48 JM |
569 | if (expr == NULL_TREE) |
570 | /* Empty condition in 'for'. */ | |
571 | gcc_assert (empty_expr_stmt_p (cond)); | |
572 | else if (check_for_bare_parameter_packs (expr)) | |
573 | expr = error_mark_node; | |
574 | else if (!empty_expr_stmt_p (cond)) | |
575 | expr = build2 (COMPOUND_EXPR, TREE_TYPE (expr), cond, expr); | |
35b1567d | 576 | } |
caf2523d | 577 | *cond_p = expr; |
35b1567d BC |
578 | } |
579 | ||
325c3691 RH |
580 | /* If *COND_P specifies a conditional with a declaration, transform the |
581 | loop such that | |
0cbd7506 MS |
582 | while (A x = 42) { } |
583 | for (; A x = 42;) { } | |
325c3691 | 584 | becomes |
0cbd7506 MS |
585 | while (true) { A x = 42; if (!x) break; } |
586 | for (;;) { A x = 42; if (!x) break; } | |
caf2523d RH |
587 | The statement list for BODY will be empty if the conditional did |
588 | not declare anything. */ | |
c8094d83 | 589 | |
325c3691 | 590 | static void |
caf2523d | 591 | simplify_loop_decl_cond (tree *cond_p, tree body) |
325c3691 | 592 | { |
caf2523d | 593 | tree cond, if_stmt; |
325c3691 | 594 | |
caf2523d RH |
595 | if (!TREE_SIDE_EFFECTS (body)) |
596 | return; | |
325c3691 | 597 | |
caf2523d RH |
598 | cond = *cond_p; |
599 | *cond_p = boolean_true_node; | |
c8094d83 | 600 | |
caf2523d | 601 | if_stmt = begin_if_stmt (); |
5ade1ed2 | 602 | cond = cp_build_unary_op (TRUTH_NOT_EXPR, cond, 0, tf_warning_or_error); |
caf2523d RH |
603 | finish_if_stmt_cond (cond, if_stmt); |
604 | finish_break_stmt (); | |
605 | finish_then_clause (if_stmt); | |
606 | finish_if_stmt (if_stmt); | |
607 | } | |
325c3691 | 608 | |
35b1567d BC |
609 | /* Finish a goto-statement. */ |
610 | ||
3e4d04a1 | 611 | tree |
3a978d72 | 612 | finish_goto_stmt (tree destination) |
35b1567d | 613 | { |
9dc6f476 | 614 | if (identifier_p (destination)) |
35b1567d BC |
615 | destination = lookup_label (destination); |
616 | ||
617 | /* We warn about unused labels with -Wunused. That means we have to | |
618 | mark the used labels as used. */ | |
619 | if (TREE_CODE (destination) == LABEL_DECL) | |
620 | TREE_USED (destination) = 1; | |
fc2b8477 MM |
621 | else |
622 | { | |
84628aa8 | 623 | destination = mark_rvalue_use (destination); |
fc2b8477 | 624 | if (!processing_template_decl) |
f5651df1 | 625 | { |
4b978f96 PC |
626 | destination = cp_convert (ptr_type_node, destination, |
627 | tf_warning_or_error); | |
f5651df1 JJ |
628 | if (error_operand_p (destination)) |
629 | return NULL_TREE; | |
53406315 JJ |
630 | destination |
631 | = fold_build_cleanup_point_expr (TREE_TYPE (destination), | |
632 | destination); | |
f5651df1 | 633 | } |
fc2b8477 | 634 | } |
c8094d83 | 635 | |
35b1567d BC |
636 | check_goto (destination); |
637 | ||
c2255bc4 | 638 | return add_stmt (build_stmt (input_location, GOTO_EXPR, destination)); |
35b1567d BC |
639 | } |
640 | ||
ed5511d9 | 641 | /* COND is the condition-expression for an if, while, etc., |
d4033c81 MLI |
642 | statement. Convert it to a boolean value, if appropriate. |
643 | In addition, verify sequence points if -Wsequence-point is enabled. */ | |
ed5511d9 | 644 | |
8ce33230 | 645 | static tree |
3a978d72 | 646 | maybe_convert_cond (tree cond) |
ed5511d9 MM |
647 | { |
648 | /* Empty conditions remain empty. */ | |
649 | if (!cond) | |
650 | return NULL_TREE; | |
651 | ||
652 | /* Wait until we instantiate templates before doing conversion. */ | |
653 | if (processing_template_decl) | |
654 | return cond; | |
655 | ||
d4033c81 MLI |
656 | if (warn_sequence_point) |
657 | verify_sequence_points (cond); | |
658 | ||
ed5511d9 MM |
659 | /* Do the conversion. */ |
660 | cond = convert_from_reference (cond); | |
fbc8d2d3 ILT |
661 | |
662 | if (TREE_CODE (cond) == MODIFY_EXPR | |
663 | && !TREE_NO_WARNING (cond) | |
664 | && warn_parentheses) | |
665 | { | |
666 | warning (OPT_Wparentheses, | |
667 | "suggest parentheses around assignment used as truth value"); | |
668 | TREE_NO_WARNING (cond) = 1; | |
669 | } | |
670 | ||
ed5511d9 MM |
671 | return condition_conversion (cond); |
672 | } | |
673 | ||
9bfadf57 | 674 | /* Finish an expression-statement, whose EXPRESSION is as indicated. */ |
a7e4cfa0 | 675 | |
3e4d04a1 | 676 | tree |
3a978d72 | 677 | finish_expr_stmt (tree expr) |
ad321293 | 678 | { |
3e4d04a1 RH |
679 | tree r = NULL_TREE; |
680 | ||
ce4a0391 | 681 | if (expr != NULL_TREE) |
ad321293 | 682 | { |
a5bcc582 | 683 | if (!processing_template_decl) |
3a5b9284 RH |
684 | { |
685 | if (warn_sequence_point) | |
686 | verify_sequence_points (expr); | |
ebeb2c24 | 687 | expr = convert_to_void (expr, ICV_STATEMENT, tf_warning_or_error); |
3a5b9284 | 688 | } |
47d4c811 | 689 | else if (!type_dependent_expression_p (expr)) |
ebeb2c24 | 690 | convert_to_void (build_non_dependent_expr (expr), ICV_STATEMENT, |
5ade1ed2 | 691 | tf_warning_or_error); |
325c3691 | 692 | |
7b3e2d46 | 693 | if (check_for_bare_parameter_packs (expr)) |
4439d02f | 694 | expr = error_mark_node; |
5d80a306 | 695 | |
325c3691 | 696 | /* Simplification of inner statement expressions, compound exprs, |
ca5b80f3 | 697 | etc can result in us already having an EXPR_STMT. */ |
543a0daa RH |
698 | if (TREE_CODE (expr) != CLEANUP_POINT_EXPR) |
699 | { | |
700 | if (TREE_CODE (expr) != EXPR_STMT) | |
c2255bc4 | 701 | expr = build_stmt (input_location, EXPR_STMT, expr); |
0ad28dde | 702 | expr = maybe_cleanup_point_expr_void (expr); |
543a0daa RH |
703 | } |
704 | ||
325c3691 | 705 | r = add_stmt (expr); |
35b1567d | 706 | } |
364460b6 | 707 | |
3e4d04a1 | 708 | return r; |
35b1567d BC |
709 | } |
710 | ||
35b1567d | 711 | |
ad321293 MM |
712 | /* Begin an if-statement. Returns a newly created IF_STMT if |
713 | appropriate. */ | |
714 | ||
715 | tree | |
3a978d72 | 716 | begin_if_stmt (void) |
ad321293 | 717 | { |
325c3691 | 718 | tree r, scope; |
1eb2a14d | 719 | scope = do_pushlevel (sk_cond); |
545f261b NF |
720 | r = build_stmt (input_location, IF_STMT, NULL_TREE, |
721 | NULL_TREE, NULL_TREE, scope); | |
caf2523d | 722 | begin_cond (&IF_COND (r)); |
ad321293 MM |
723 | return r; |
724 | } | |
725 | ||
726 | /* Process the COND of an if-statement, which may be given by | |
727 | IF_STMT. */ | |
728 | ||
c8094d83 | 729 | void |
3a978d72 | 730 | finish_if_stmt_cond (tree cond, tree if_stmt) |
ad321293 | 731 | { |
caf2523d RH |
732 | finish_cond (&IF_COND (if_stmt), maybe_convert_cond (cond)); |
733 | add_stmt (if_stmt); | |
325c3691 | 734 | THEN_CLAUSE (if_stmt) = push_stmt_list (); |
ad321293 MM |
735 | } |
736 | ||
737 | /* Finish the then-clause of an if-statement, which may be given by | |
738 | IF_STMT. */ | |
739 | ||
740 | tree | |
3a978d72 | 741 | finish_then_clause (tree if_stmt) |
ad321293 | 742 | { |
325c3691 | 743 | THEN_CLAUSE (if_stmt) = pop_stmt_list (THEN_CLAUSE (if_stmt)); |
35b1567d | 744 | return if_stmt; |
ad321293 MM |
745 | } |
746 | ||
747 | /* Begin the else-clause of an if-statement. */ | |
748 | ||
325c3691 RH |
749 | void |
750 | begin_else_clause (tree if_stmt) | |
ad321293 | 751 | { |
325c3691 | 752 | ELSE_CLAUSE (if_stmt) = push_stmt_list (); |
ad321293 MM |
753 | } |
754 | ||
755 | /* Finish the else-clause of an if-statement, which may be given by | |
756 | IF_STMT. */ | |
757 | ||
758 | void | |
3a978d72 | 759 | finish_else_clause (tree if_stmt) |
ad321293 | 760 | { |
325c3691 | 761 | ELSE_CLAUSE (if_stmt) = pop_stmt_list (ELSE_CLAUSE (if_stmt)); |
ad321293 MM |
762 | } |
763 | ||
dfbb4f34 | 764 | /* Finish an if-statement. */ |
ad321293 | 765 | |
c8094d83 | 766 | void |
325c3691 | 767 | finish_if_stmt (tree if_stmt) |
ad321293 | 768 | { |
545f261b NF |
769 | tree scope = IF_SCOPE (if_stmt); |
770 | IF_SCOPE (if_stmt) = NULL; | |
325c3691 | 771 | add_stmt (do_poplevel (scope)); |
35b1567d BC |
772 | } |
773 | ||
ad321293 MM |
774 | /* Begin a while-statement. Returns a newly created WHILE_STMT if |
775 | appropriate. */ | |
776 | ||
777 | tree | |
3a978d72 | 778 | begin_while_stmt (void) |
ad321293 MM |
779 | { |
780 | tree r; | |
c2255bc4 | 781 | r = build_stmt (input_location, WHILE_STMT, NULL_TREE, NULL_TREE); |
ae499cce | 782 | add_stmt (r); |
325c3691 | 783 | WHILE_BODY (r) = do_pushlevel (sk_block); |
caf2523d | 784 | begin_cond (&WHILE_COND (r)); |
ad321293 MM |
785 | return r; |
786 | } | |
787 | ||
27d26ee7 | 788 | /* Process the COND of a while-statement, which may be given by |
ad321293 MM |
789 | WHILE_STMT. */ |
790 | ||
c8094d83 | 791 | void |
c5028d80 | 792 | finish_while_stmt_cond (tree cond, tree while_stmt, bool ivdep) |
ad321293 | 793 | { |
20f18c3c JM |
794 | cond = maybe_convert_cond (cond); |
795 | finish_cond (&WHILE_COND (while_stmt), cond); | |
796 | begin_maybe_infinite_loop (cond); | |
c5028d80 TB |
797 | if (ivdep && cond != error_mark_node) |
798 | WHILE_COND (while_stmt) = build2 (ANNOTATE_EXPR, | |
799 | TREE_TYPE (WHILE_COND (while_stmt)), | |
800 | WHILE_COND (while_stmt), | |
801 | build_int_cst (integer_type_node, | |
802 | annot_expr_ivdep_kind)); | |
caf2523d | 803 | simplify_loop_decl_cond (&WHILE_COND (while_stmt), WHILE_BODY (while_stmt)); |
ad321293 MM |
804 | } |
805 | ||
806 | /* Finish a while-statement, which may be given by WHILE_STMT. */ | |
807 | ||
c8094d83 | 808 | void |
3a978d72 | 809 | finish_while_stmt (tree while_stmt) |
ad321293 | 810 | { |
20f18c3c | 811 | end_maybe_infinite_loop (boolean_true_node); |
325c3691 | 812 | WHILE_BODY (while_stmt) = do_poplevel (WHILE_BODY (while_stmt)); |
ad321293 MM |
813 | } |
814 | ||
815 | /* Begin a do-statement. Returns a newly created DO_STMT if | |
816 | appropriate. */ | |
817 | ||
818 | tree | |
3a978d72 | 819 | begin_do_stmt (void) |
ad321293 | 820 | { |
c2255bc4 | 821 | tree r = build_stmt (input_location, DO_STMT, NULL_TREE, NULL_TREE); |
20f18c3c | 822 | begin_maybe_infinite_loop (boolean_true_node); |
ae499cce | 823 | add_stmt (r); |
325c3691 | 824 | DO_BODY (r) = push_stmt_list (); |
35b1567d | 825 | return r; |
ad321293 MM |
826 | } |
827 | ||
828 | /* Finish the body of a do-statement, which may be given by DO_STMT. */ | |
829 | ||
830 | void | |
3a978d72 | 831 | finish_do_body (tree do_stmt) |
ad321293 | 832 | { |
62e00e94 DM |
833 | tree body = DO_BODY (do_stmt) = pop_stmt_list (DO_BODY (do_stmt)); |
834 | ||
835 | if (TREE_CODE (body) == STATEMENT_LIST && STATEMENT_LIST_TAIL (body)) | |
836 | body = STATEMENT_LIST_TAIL (body)->stmt; | |
837 | ||
838 | if (IS_EMPTY_STMT (body)) | |
839 | warning (OPT_Wempty_body, | |
840 | "suggest explicit braces around empty body in %<do%> statement"); | |
ad321293 MM |
841 | } |
842 | ||
843 | /* Finish a do-statement, which may be given by DO_STMT, and whose | |
844 | COND is as indicated. */ | |
845 | ||
846 | void | |
c5028d80 | 847 | finish_do_stmt (tree cond, tree do_stmt, bool ivdep) |
ad321293 | 848 | { |
ed5511d9 | 849 | cond = maybe_convert_cond (cond); |
20f18c3c | 850 | end_maybe_infinite_loop (cond); |
c5028d80 TB |
851 | if (ivdep && cond != error_mark_node) |
852 | cond = build2 (ANNOTATE_EXPR, TREE_TYPE (cond), cond, | |
853 | build_int_cst (integer_type_node, annot_expr_ivdep_kind)); | |
35b1567d | 854 | DO_COND (do_stmt) = cond; |
35b1567d | 855 | } |
ed5511d9 | 856 | |
ad321293 MM |
857 | /* Finish a return-statement. The EXPRESSION returned, if any, is as |
858 | indicated. */ | |
859 | ||
3e4d04a1 | 860 | tree |
3a978d72 | 861 | finish_return_stmt (tree expr) |
ad321293 | 862 | { |
3e4d04a1 | 863 | tree r; |
0c9b182b | 864 | bool no_warning; |
3e4d04a1 | 865 | |
0c9b182b | 866 | expr = check_return_expr (expr, &no_warning); |
1799e5d5 | 867 | |
830ce0a2 MP |
868 | if (error_operand_p (expr) |
869 | || (flag_openmp && !check_omp_return ())) | |
1799e5d5 | 870 | return error_mark_node; |
35b1567d | 871 | if (!processing_template_decl) |
efee38a9 | 872 | { |
d4033c81 MLI |
873 | if (warn_sequence_point) |
874 | verify_sequence_points (expr); | |
875 | ||
44d10c10 | 876 | if (DECL_DESTRUCTOR_P (current_function_decl) |
c8094d83 | 877 | || (DECL_CONSTRUCTOR_P (current_function_decl) |
44d10c10 | 878 | && targetm.cxx.cdtor_returns_this ())) |
efee38a9 MM |
879 | { |
880 | /* Similarly, all destructors must run destructors for | |
881 | base-classes before returning. So, all returns in a | |
dfbb4f34 | 882 | destructor get sent to the DTOR_LABEL; finish_function emits |
efee38a9 | 883 | code to return a value there. */ |
44d10c10 | 884 | return finish_goto_stmt (cdtor_label); |
efee38a9 MM |
885 | } |
886 | } | |
543a0daa | 887 | |
c2255bc4 | 888 | r = build_stmt (input_location, RETURN_EXPR, expr); |
0c9b182b | 889 | TREE_NO_WARNING (r) |= no_warning; |
0ad28dde | 890 | r = maybe_cleanup_point_expr_void (r); |
543a0daa | 891 | r = add_stmt (r); |
3e4d04a1 RH |
892 | |
893 | return r; | |
35b1567d | 894 | } |
efee38a9 | 895 | |
3f43ac31 RRC |
896 | /* Begin the scope of a for-statement or a range-for-statement. |
897 | Both the returned trees are to be used in a call to | |
898 | begin_for_stmt or begin_range_for_stmt. */ | |
ad321293 MM |
899 | |
900 | tree | |
3f43ac31 RRC |
901 | begin_for_scope (tree *init) |
902 | { | |
903 | tree scope = NULL_TREE; | |
904 | if (flag_new_for_scope > 0) | |
905 | scope = do_pushlevel (sk_for); | |
906 | ||
907 | if (processing_template_decl) | |
908 | *init = push_stmt_list (); | |
909 | else | |
910 | *init = NULL_TREE; | |
911 | ||
912 | return scope; | |
913 | } | |
914 | ||
915 | /* Begin a for-statement. Returns a new FOR_STMT. | |
916 | SCOPE and INIT should be the return of begin_for_scope, | |
917 | or both NULL_TREE */ | |
918 | ||
919 | tree | |
920 | begin_for_stmt (tree scope, tree init) | |
ad321293 MM |
921 | { |
922 | tree r; | |
923 | ||
c2255bc4 | 924 | r = build_stmt (input_location, FOR_STMT, NULL_TREE, NULL_TREE, |
40e71fc7 | 925 | NULL_TREE, NULL_TREE, NULL_TREE); |
325c3691 | 926 | |
3f43ac31 RRC |
927 | if (scope == NULL_TREE) |
928 | { | |
95cc031f JJ |
929 | gcc_assert (!init || !(flag_new_for_scope > 0)); |
930 | if (!init) | |
931 | scope = begin_for_scope (&init); | |
3f43ac31 RRC |
932 | } |
933 | FOR_INIT_STMT (r) = init; | |
40e71fc7 | 934 | FOR_SCOPE (r) = scope; |
894ca2c9 | 935 | |
ad321293 MM |
936 | return r; |
937 | } | |
938 | ||
939 | /* Finish the for-init-statement of a for-statement, which may be | |
940 | given by FOR_STMT. */ | |
941 | ||
942 | void | |
3a978d72 | 943 | finish_for_init_stmt (tree for_stmt) |
ad321293 | 944 | { |
894ca2c9 RH |
945 | if (processing_template_decl) |
946 | FOR_INIT_STMT (for_stmt) = pop_stmt_list (FOR_INIT_STMT (for_stmt)); | |
325c3691 RH |
947 | add_stmt (for_stmt); |
948 | FOR_BODY (for_stmt) = do_pushlevel (sk_block); | |
caf2523d | 949 | begin_cond (&FOR_COND (for_stmt)); |
ad321293 MM |
950 | } |
951 | ||
952 | /* Finish the COND of a for-statement, which may be given by | |
953 | FOR_STMT. */ | |
954 | ||
955 | void | |
c5028d80 | 956 | finish_for_cond (tree cond, tree for_stmt, bool ivdep) |
ad321293 | 957 | { |
20f18c3c JM |
958 | cond = maybe_convert_cond (cond); |
959 | finish_cond (&FOR_COND (for_stmt), cond); | |
960 | begin_maybe_infinite_loop (cond); | |
c5028d80 TB |
961 | if (ivdep && cond != error_mark_node) |
962 | FOR_COND (for_stmt) = build2 (ANNOTATE_EXPR, | |
963 | TREE_TYPE (FOR_COND (for_stmt)), | |
964 | FOR_COND (for_stmt), | |
965 | build_int_cst (integer_type_node, | |
966 | annot_expr_ivdep_kind)); | |
caf2523d | 967 | simplify_loop_decl_cond (&FOR_COND (for_stmt), FOR_BODY (for_stmt)); |
ad321293 MM |
968 | } |
969 | ||
970 | /* Finish the increment-EXPRESSION in a for-statement, which may be | |
971 | given by FOR_STMT. */ | |
972 | ||
973 | void | |
3a978d72 | 974 | finish_for_expr (tree expr, tree for_stmt) |
ad321293 | 975 | { |
543a0daa RH |
976 | if (!expr) |
977 | return; | |
6f69173e MM |
978 | /* If EXPR is an overloaded function, issue an error; there is no |
979 | context available to use to perform overload resolution. */ | |
543a0daa | 980 | if (type_unknown_p (expr)) |
6f69173e MM |
981 | { |
982 | cxx_incomplete_type_error (expr, TREE_TYPE (expr)); | |
983 | expr = error_mark_node; | |
984 | } | |
bcd46a7c AP |
985 | if (!processing_template_decl) |
986 | { | |
987 | if (warn_sequence_point) | |
0cbd7506 | 988 | verify_sequence_points (expr); |
ebeb2c24 | 989 | expr = convert_to_void (expr, ICV_THIRD_IN_FOR, |
5ade1ed2 | 990 | tf_warning_or_error); |
bcd46a7c AP |
991 | } |
992 | else if (!type_dependent_expression_p (expr)) | |
ebeb2c24 | 993 | convert_to_void (build_non_dependent_expr (expr), ICV_THIRD_IN_FOR, |
5ade1ed2 | 994 | tf_warning_or_error); |
0ad28dde | 995 | expr = maybe_cleanup_point_expr_void (expr); |
7b3e2d46 | 996 | if (check_for_bare_parameter_packs (expr)) |
4439d02f | 997 | expr = error_mark_node; |
35b1567d | 998 | FOR_EXPR (for_stmt) = expr; |
ad321293 MM |
999 | } |
1000 | ||
1001 | /* Finish the body of a for-statement, which may be given by | |
1002 | FOR_STMT. The increment-EXPR for the loop must be | |
f9132eb7 RRC |
1003 | provided. |
1004 | It can also finish RANGE_FOR_STMT. */ | |
ad321293 MM |
1005 | |
1006 | void | |
3a978d72 | 1007 | finish_for_stmt (tree for_stmt) |
ad321293 | 1008 | { |
20f18c3c JM |
1009 | end_maybe_infinite_loop (boolean_true_node); |
1010 | ||
f9132eb7 | 1011 | if (TREE_CODE (for_stmt) == RANGE_FOR_STMT) |
a8733ebf | 1012 | RANGE_FOR_BODY (for_stmt) = do_poplevel (RANGE_FOR_BODY (for_stmt)); |
f9132eb7 | 1013 | else |
a8733ebf | 1014 | FOR_BODY (for_stmt) = do_poplevel (FOR_BODY (for_stmt)); |
325c3691 | 1015 | |
ad321293 | 1016 | /* Pop the scope for the body of the loop. */ |
a8733ebf | 1017 | if (flag_new_for_scope > 0) |
325c3691 | 1018 | { |
40e71fc7 NF |
1019 | tree scope; |
1020 | tree *scope_ptr = (TREE_CODE (for_stmt) == RANGE_FOR_STMT | |
1021 | ? &RANGE_FOR_SCOPE (for_stmt) | |
1022 | : &FOR_SCOPE (for_stmt)); | |
1023 | scope = *scope_ptr; | |
1024 | *scope_ptr = NULL; | |
325c3691 RH |
1025 | add_stmt (do_poplevel (scope)); |
1026 | } | |
ad321293 MM |
1027 | } |
1028 | ||
f9132eb7 | 1029 | /* Begin a range-for-statement. Returns a new RANGE_FOR_STMT. |
3f43ac31 RRC |
1030 | SCOPE and INIT should be the return of begin_for_scope, |
1031 | or both NULL_TREE . | |
f9132eb7 RRC |
1032 | To finish it call finish_for_stmt(). */ |
1033 | ||
1034 | tree | |
3f43ac31 | 1035 | begin_range_for_stmt (tree scope, tree init) |
f9132eb7 RRC |
1036 | { |
1037 | tree r; | |
a8733ebf | 1038 | |
20f18c3c JM |
1039 | begin_maybe_infinite_loop (boolean_false_node); |
1040 | ||
f9132eb7 | 1041 | r = build_stmt (input_location, RANGE_FOR_STMT, |
40e71fc7 | 1042 | NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE); |
a8733ebf | 1043 | |
3f43ac31 RRC |
1044 | if (scope == NULL_TREE) |
1045 | { | |
95cc031f JJ |
1046 | gcc_assert (!init || !(flag_new_for_scope > 0)); |
1047 | if (!init) | |
1048 | scope = begin_for_scope (&init); | |
3f43ac31 RRC |
1049 | } |
1050 | ||
1051 | /* RANGE_FOR_STMTs do not use nor save the init tree, so we | |
1052 | pop it now. */ | |
1053 | if (init) | |
1054 | pop_stmt_list (init); | |
40e71fc7 | 1055 | RANGE_FOR_SCOPE (r) = scope; |
f9132eb7 RRC |
1056 | |
1057 | return r; | |
1058 | } | |
1059 | ||
1060 | /* Finish the head of a range-based for statement, which may | |
1061 | be given by RANGE_FOR_STMT. DECL must be the declaration | |
1062 | and EXPR must be the loop expression. */ | |
1063 | ||
1064 | void | |
1065 | finish_range_for_decl (tree range_for_stmt, tree decl, tree expr) | |
1066 | { | |
1067 | RANGE_FOR_DECL (range_for_stmt) = decl; | |
1068 | RANGE_FOR_EXPR (range_for_stmt) = expr; | |
1069 | add_stmt (range_for_stmt); | |
1070 | RANGE_FOR_BODY (range_for_stmt) = do_pushlevel (sk_block); | |
1071 | } | |
1072 | ||
ad321293 MM |
1073 | /* Finish a break-statement. */ |
1074 | ||
3e4d04a1 | 1075 | tree |
3a978d72 | 1076 | finish_break_stmt (void) |
ad321293 | 1077 | { |
04771457 JM |
1078 | /* In switch statements break is sometimes stylistically used after |
1079 | a return statement. This can lead to spurious warnings about | |
1080 | control reaching the end of a non-void function when it is | |
1081 | inlined. Note that we are calling block_may_fallthru with | |
1082 | language specific tree nodes; this works because | |
1083 | block_may_fallthru returns true when given something it does not | |
1084 | understand. */ | |
1085 | if (!block_may_fallthru (cur_stmt_list)) | |
632f2871 | 1086 | return void_node; |
c2255bc4 | 1087 | return add_stmt (build_stmt (input_location, BREAK_STMT)); |
35b1567d BC |
1088 | } |
1089 | ||
ad321293 MM |
1090 | /* Finish a continue-statement. */ |
1091 | ||
3e4d04a1 | 1092 | tree |
3a978d72 | 1093 | finish_continue_stmt (void) |
ad321293 | 1094 | { |
c2255bc4 | 1095 | return add_stmt (build_stmt (input_location, CONTINUE_STMT)); |
ad321293 MM |
1096 | } |
1097 | ||
35b1567d BC |
1098 | /* Begin a switch-statement. Returns a new SWITCH_STMT if |
1099 | appropriate. */ | |
1100 | ||
1101 | tree | |
3a978d72 | 1102 | begin_switch_stmt (void) |
35b1567d | 1103 | { |
325c3691 RH |
1104 | tree r, scope; |
1105 | ||
1eb2a14d | 1106 | scope = do_pushlevel (sk_cond); |
1f18dbc6 NF |
1107 | r = build_stmt (input_location, SWITCH_STMT, NULL_TREE, NULL_TREE, NULL_TREE, scope); |
1108 | ||
ebaae582 | 1109 | begin_cond (&SWITCH_STMT_COND (r)); |
325c3691 | 1110 | |
527f0080 | 1111 | return r; |
ad321293 MM |
1112 | } |
1113 | ||
527f0080 | 1114 | /* Finish the cond of a switch-statement. */ |
ad321293 | 1115 | |
527f0080 | 1116 | void |
3a978d72 | 1117 | finish_switch_cond (tree cond, tree switch_stmt) |
ad321293 | 1118 | { |
6f9fdf4d | 1119 | tree orig_type = NULL; |
35b1567d | 1120 | if (!processing_template_decl) |
373eb3b3 | 1121 | { |
35b1567d | 1122 | /* Convert the condition to an integer or enumeration type. */ |
b746c5dc | 1123 | cond = build_expr_type_conversion (WANT_INT | WANT_ENUM, cond, true); |
35b1567d | 1124 | if (cond == NULL_TREE) |
373eb3b3 | 1125 | { |
35b1567d BC |
1126 | error ("switch quantity not an integer"); |
1127 | cond = error_mark_node; | |
1128 | } | |
6f9fdf4d | 1129 | orig_type = TREE_TYPE (cond); |
35b1567d BC |
1130 | if (cond != error_mark_node) |
1131 | { | |
fedfecef MP |
1132 | /* Warn if the condition has boolean value. */ |
1133 | if (TREE_CODE (orig_type) == BOOLEAN_TYPE) | |
1134 | warning_at (input_location, OPT_Wswitch_bool, | |
1135 | "switch condition has type bool"); | |
1136 | ||
0a72704b MM |
1137 | /* [stmt.switch] |
1138 | ||
1139 | Integral promotions are performed. */ | |
1140 | cond = perform_integral_promotions (cond); | |
543a0daa | 1141 | cond = maybe_cleanup_point_expr (cond); |
373eb3b3 | 1142 | } |
ad321293 | 1143 | } |
7b3e2d46 | 1144 | if (check_for_bare_parameter_packs (cond)) |
4439d02f | 1145 | cond = error_mark_node; |
d4033c81 MLI |
1146 | else if (!processing_template_decl && warn_sequence_point) |
1147 | verify_sequence_points (cond); | |
1148 | ||
ebaae582 SB |
1149 | finish_cond (&SWITCH_STMT_COND (switch_stmt), cond); |
1150 | SWITCH_STMT_TYPE (switch_stmt) = orig_type; | |
caf2523d | 1151 | add_stmt (switch_stmt); |
56cb9733 | 1152 | push_switch (switch_stmt); |
ebaae582 | 1153 | SWITCH_STMT_BODY (switch_stmt) = push_stmt_list (); |
ad321293 MM |
1154 | } |
1155 | ||
1156 | /* Finish the body of a switch-statement, which may be given by | |
1157 | SWITCH_STMT. The COND to switch on is indicated. */ | |
1158 | ||
1159 | void | |
3a978d72 | 1160 | finish_switch_stmt (tree switch_stmt) |
ad321293 | 1161 | { |
325c3691 RH |
1162 | tree scope; |
1163 | ||
ebaae582 SB |
1164 | SWITCH_STMT_BODY (switch_stmt) = |
1165 | pop_stmt_list (SWITCH_STMT_BODY (switch_stmt)); | |
c8094d83 | 1166 | pop_switch (); |
325c3691 | 1167 | |
1f18dbc6 NF |
1168 | scope = SWITCH_STMT_SCOPE (switch_stmt); |
1169 | SWITCH_STMT_SCOPE (switch_stmt) = NULL; | |
325c3691 | 1170 | add_stmt (do_poplevel (scope)); |
ad321293 MM |
1171 | } |
1172 | ||
ad321293 MM |
1173 | /* Begin a try-block. Returns a newly-created TRY_BLOCK if |
1174 | appropriate. */ | |
1175 | ||
1176 | tree | |
3a978d72 | 1177 | begin_try_block (void) |
ad321293 | 1178 | { |
c2255bc4 | 1179 | tree r = build_stmt (input_location, TRY_BLOCK, NULL_TREE, NULL_TREE); |
ae499cce | 1180 | add_stmt (r); |
325c3691 | 1181 | TRY_STMTS (r) = push_stmt_list (); |
35b1567d | 1182 | return r; |
ad321293 MM |
1183 | } |
1184 | ||
eaf6fb90 MM |
1185 | /* Likewise, for a function-try-block. The block returned in |
1186 | *COMPOUND_STMT is an artificial outer scope, containing the | |
1187 | function-try-block. */ | |
0dde4175 JM |
1188 | |
1189 | tree | |
eaf6fb90 | 1190 | begin_function_try_block (tree *compound_stmt) |
0dde4175 | 1191 | { |
eaf6fb90 MM |
1192 | tree r; |
1193 | /* This outer scope does not exist in the C++ standard, but we need | |
1194 | a place to put __FUNCTION__ and similar variables. */ | |
1195 | *compound_stmt = begin_compound_stmt (0); | |
1196 | r = begin_try_block (); | |
35b1567d | 1197 | FN_TRY_BLOCK_P (r) = 1; |
35b1567d | 1198 | return r; |
0dde4175 JM |
1199 | } |
1200 | ||
ad321293 MM |
1201 | /* Finish a try-block, which may be given by TRY_BLOCK. */ |
1202 | ||
1203 | void | |
3a978d72 | 1204 | finish_try_block (tree try_block) |
ad321293 | 1205 | { |
325c3691 RH |
1206 | TRY_STMTS (try_block) = pop_stmt_list (TRY_STMTS (try_block)); |
1207 | TRY_HANDLERS (try_block) = push_stmt_list (); | |
ad321293 MM |
1208 | } |
1209 | ||
efa8eda3 MM |
1210 | /* Finish the body of a cleanup try-block, which may be given by |
1211 | TRY_BLOCK. */ | |
1212 | ||
62409b39 | 1213 | void |
3a978d72 | 1214 | finish_cleanup_try_block (tree try_block) |
62409b39 | 1215 | { |
325c3691 | 1216 | TRY_STMTS (try_block) = pop_stmt_list (TRY_STMTS (try_block)); |
62409b39 MM |
1217 | } |
1218 | ||
f1dedc31 MM |
1219 | /* Finish an implicitly generated try-block, with a cleanup is given |
1220 | by CLEANUP. */ | |
1221 | ||
1222 | void | |
3a978d72 | 1223 | finish_cleanup (tree cleanup, tree try_block) |
f1dedc31 | 1224 | { |
35b1567d BC |
1225 | TRY_HANDLERS (try_block) = cleanup; |
1226 | CLEANUP_P (try_block) = 1; | |
f1dedc31 MM |
1227 | } |
1228 | ||
0dde4175 JM |
1229 | /* Likewise, for a function-try-block. */ |
1230 | ||
1231 | void | |
3a978d72 | 1232 | finish_function_try_block (tree try_block) |
0dde4175 | 1233 | { |
325c3691 RH |
1234 | finish_try_block (try_block); |
1235 | /* FIXME : something queer about CTOR_INITIALIZER somehow following | |
1236 | the try block, but moving it inside. */ | |
b35d4555 | 1237 | in_function_try_handler = 1; |
0dde4175 JM |
1238 | } |
1239 | ||
ad321293 MM |
1240 | /* Finish a handler-sequence for a try-block, which may be given by |
1241 | TRY_BLOCK. */ | |
1242 | ||
1243 | void | |
3a978d72 | 1244 | finish_handler_sequence (tree try_block) |
ad321293 | 1245 | { |
325c3691 | 1246 | TRY_HANDLERS (try_block) = pop_stmt_list (TRY_HANDLERS (try_block)); |
35b1567d | 1247 | check_handlers (TRY_HANDLERS (try_block)); |
ad321293 MM |
1248 | } |
1249 | ||
eaf6fb90 MM |
1250 | /* Finish the handler-seq for a function-try-block, given by |
1251 | TRY_BLOCK. COMPOUND_STMT is the outer block created by | |
1252 | begin_function_try_block. */ | |
0dde4175 JM |
1253 | |
1254 | void | |
eaf6fb90 | 1255 | finish_function_handler_sequence (tree try_block, tree compound_stmt) |
0dde4175 | 1256 | { |
b35d4555 | 1257 | in_function_try_handler = 0; |
325c3691 | 1258 | finish_handler_sequence (try_block); |
eaf6fb90 | 1259 | finish_compound_stmt (compound_stmt); |
35b1567d BC |
1260 | } |
1261 | ||
ad321293 MM |
1262 | /* Begin a handler. Returns a HANDLER if appropriate. */ |
1263 | ||
1264 | tree | |
3a978d72 | 1265 | begin_handler (void) |
ad321293 MM |
1266 | { |
1267 | tree r; | |
325c3691 | 1268 | |
c2255bc4 | 1269 | r = build_stmt (input_location, HANDLER, NULL_TREE, NULL_TREE); |
ae499cce | 1270 | add_stmt (r); |
325c3691 | 1271 | |
1a6025b4 JM |
1272 | /* Create a binding level for the eh_info and the exception object |
1273 | cleanup. */ | |
325c3691 RH |
1274 | HANDLER_BODY (r) = do_pushlevel (sk_catch); |
1275 | ||
ad321293 MM |
1276 | return r; |
1277 | } | |
1278 | ||
1279 | /* Finish the handler-parameters for a handler, which may be given by | |
b35d4555 MM |
1280 | HANDLER. DECL is the declaration for the catch parameter, or NULL |
1281 | if this is a `catch (...)' clause. */ | |
ad321293 | 1282 | |
1a6025b4 | 1283 | void |
3a978d72 | 1284 | finish_handler_parms (tree decl, tree handler) |
b35d4555 | 1285 | { |
1a6025b4 | 1286 | tree type = NULL_TREE; |
b35d4555 MM |
1287 | if (processing_template_decl) |
1288 | { | |
1289 | if (decl) | |
1290 | { | |
1291 | decl = pushdecl (decl); | |
1292 | decl = push_template_decl (decl); | |
325c3691 | 1293 | HANDLER_PARMS (handler) = decl; |
1a6025b4 | 1294 | type = TREE_TYPE (decl); |
b35d4555 MM |
1295 | } |
1296 | } | |
35b1567d | 1297 | else |
1a6025b4 | 1298 | type = expand_start_catch_block (decl); |
1a6025b4 | 1299 | HANDLER_TYPE (handler) = type; |
35b1567d BC |
1300 | } |
1301 | ||
1302 | /* Finish a handler, which may be given by HANDLER. The BLOCKs are | |
1303 | the return value from the matching call to finish_handler_parms. */ | |
1304 | ||
1305 | void | |
3a978d72 | 1306 | finish_handler (tree handler) |
35b1567d BC |
1307 | { |
1308 | if (!processing_template_decl) | |
1a6025b4 | 1309 | expand_end_catch_block (); |
325c3691 | 1310 | HANDLER_BODY (handler) = do_poplevel (HANDLER_BODY (handler)); |
35b1567d BC |
1311 | } |
1312 | ||
5882f0f3 | 1313 | /* Begin a compound statement. FLAGS contains some bits that control the |
5995ebfb | 1314 | behavior and context. If BCS_NO_SCOPE is set, the compound statement |
5882f0f3 | 1315 | does not define a scope. If BCS_FN_BODY is set, this is the outermost |
c8094d83 | 1316 | block of a function. If BCS_TRY_BLOCK is set, this is the block |
5882f0f3 RH |
1317 | created on behalf of a TRY statement. Returns a token to be passed to |
1318 | finish_compound_stmt. */ | |
ad321293 MM |
1319 | |
1320 | tree | |
325c3691 | 1321 | begin_compound_stmt (unsigned int flags) |
ad321293 | 1322 | { |
325c3691 | 1323 | tree r; |
558475f0 | 1324 | |
325c3691 RH |
1325 | if (flags & BCS_NO_SCOPE) |
1326 | { | |
1327 | r = push_stmt_list (); | |
1328 | STATEMENT_LIST_NO_SCOPE (r) = 1; | |
1329 | ||
1330 | /* Normally, we try hard to keep the BLOCK for a statement-expression. | |
1331 | But, if it's a statement-expression with a scopeless block, there's | |
1332 | nothing to keep, and we don't want to accidentally keep a block | |
c8094d83 | 1333 | *inside* the scopeless block. */ |
325c3691 RH |
1334 | keep_next_level (false); |
1335 | } | |
f1dedc31 | 1336 | else |
325c3691 RH |
1337 | r = do_pushlevel (flags & BCS_TRY_BLOCK ? sk_try : sk_block); |
1338 | ||
5882f0f3 RH |
1339 | /* When processing a template, we need to remember where the braces were, |
1340 | so that we can set up identical scopes when instantiating the template | |
1341 | later. BIND_EXPR is a handy candidate for this. | |
1342 | Note that do_poplevel won't create a BIND_EXPR itself here (and thus | |
1343 | result in nested BIND_EXPRs), since we don't build BLOCK nodes when | |
1344 | processing templates. */ | |
1345 | if (processing_template_decl) | |
325c3691 | 1346 | { |
f293ce4b | 1347 | r = build3 (BIND_EXPR, NULL, NULL, r, NULL); |
5882f0f3 RH |
1348 | BIND_EXPR_TRY_BLOCK (r) = (flags & BCS_TRY_BLOCK) != 0; |
1349 | BIND_EXPR_BODY_BLOCK (r) = (flags & BCS_FN_BODY) != 0; | |
325c3691 RH |
1350 | TREE_SIDE_EFFECTS (r) = 1; |
1351 | } | |
ad321293 MM |
1352 | |
1353 | return r; | |
1354 | } | |
1355 | ||
5882f0f3 | 1356 | /* Finish a compound-statement, which is given by STMT. */ |
ad321293 | 1357 | |
325c3691 RH |
1358 | void |
1359 | finish_compound_stmt (tree stmt) | |
ad321293 | 1360 | { |
5882f0f3 | 1361 | if (TREE_CODE (stmt) == BIND_EXPR) |
e02927a1 JM |
1362 | { |
1363 | tree body = do_poplevel (BIND_EXPR_BODY (stmt)); | |
1364 | /* If the STATEMENT_LIST is empty and this BIND_EXPR isn't special, | |
1365 | discard the BIND_EXPR so it can be merged with the containing | |
1366 | STATEMENT_LIST. */ | |
1367 | if (TREE_CODE (body) == STATEMENT_LIST | |
1368 | && STATEMENT_LIST_HEAD (body) == NULL | |
1369 | && !BIND_EXPR_BODY_BLOCK (stmt) | |
1370 | && !BIND_EXPR_TRY_BLOCK (stmt)) | |
1371 | stmt = body; | |
1372 | else | |
1373 | BIND_EXPR_BODY (stmt) = body; | |
1374 | } | |
325c3691 RH |
1375 | else if (STATEMENT_LIST_NO_SCOPE (stmt)) |
1376 | stmt = pop_stmt_list (stmt); | |
7a3397c7 | 1377 | else |
5f070bc7 ZL |
1378 | { |
1379 | /* Destroy any ObjC "super" receivers that may have been | |
1380 | created. */ | |
1381 | objc_clear_super_receiver (); | |
1382 | ||
1383 | stmt = do_poplevel (stmt); | |
1384 | } | |
ad321293 | 1385 | |
325c3691 RH |
1386 | /* ??? See c_end_compound_stmt wrt statement expressions. */ |
1387 | add_stmt (stmt); | |
ad321293 MM |
1388 | } |
1389 | ||
6de9cd9a | 1390 | /* Finish an asm-statement, whose components are a STRING, some |
1c384bf1 RH |
1391 | OUTPUT_OPERANDS, some INPUT_OPERANDS, some CLOBBERS and some |
1392 | LABELS. Also note whether the asm-statement should be | |
1393 | considered volatile. */ | |
7dc5bd62 | 1394 | |
3e4d04a1 | 1395 | tree |
6de9cd9a | 1396 | finish_asm_stmt (int volatile_p, tree string, tree output_operands, |
1c384bf1 | 1397 | tree input_operands, tree clobbers, tree labels) |
35b1567d BC |
1398 | { |
1399 | tree r; | |
abfc8a36 | 1400 | tree t; |
5544530a PB |
1401 | int ninputs = list_length (input_operands); |
1402 | int noutputs = list_length (output_operands); | |
abfc8a36 | 1403 | |
abfc8a36 | 1404 | if (!processing_template_decl) |
40b18c0a | 1405 | { |
74f0c611 RH |
1406 | const char *constraint; |
1407 | const char **oconstraints; | |
1408 | bool allows_mem, allows_reg, is_inout; | |
1409 | tree operand; | |
40b18c0a | 1410 | int i; |
40b18c0a | 1411 | |
86b8fed1 | 1412 | oconstraints = XALLOCAVEC (const char *, noutputs); |
74f0c611 RH |
1413 | |
1414 | string = resolve_asm_operand_names (string, output_operands, | |
1c384bf1 | 1415 | input_operands, labels); |
74f0c611 RH |
1416 | |
1417 | for (i = 0, t = output_operands; t; t = TREE_CHAIN (t), ++i) | |
40b18c0a | 1418 | { |
74f0c611 RH |
1419 | operand = TREE_VALUE (t); |
1420 | ||
1421 | /* ??? Really, this should not be here. Users should be using a | |
1422 | proper lvalue, dammit. But there's a long history of using | |
1423 | casts in the output operands. In cases like longlong.h, this | |
1424 | becomes a primitive form of typechecking -- if the cast can be | |
1425 | removed, then the output operand had a type of the proper width; | |
1426 | otherwise we'll get an error. Gross, but ... */ | |
1427 | STRIP_NOPS (operand); | |
1428 | ||
03a904b5 JJ |
1429 | operand = mark_lvalue_use (operand); |
1430 | ||
5ade1ed2 | 1431 | if (!lvalue_or_else (operand, lv_asm, tf_warning_or_error)) |
74f0c611 RH |
1432 | operand = error_mark_node; |
1433 | ||
3db45ab5 | 1434 | if (operand != error_mark_node |
5544530a PB |
1435 | && (TREE_READONLY (operand) |
1436 | || CP_TYPE_CONST_P (TREE_TYPE (operand)) | |
3db45ab5 MS |
1437 | /* Functions are not modifiable, even though they are |
1438 | lvalues. */ | |
1439 | || TREE_CODE (TREE_TYPE (operand)) == FUNCTION_TYPE | |
1440 | || TREE_CODE (TREE_TYPE (operand)) == METHOD_TYPE | |
1441 | /* If it's an aggregate and any field is const, then it is | |
1442 | effectively const. */ | |
1443 | || (CLASS_TYPE_P (TREE_TYPE (operand)) | |
1444 | && C_TYPE_FIELDS_READONLY (TREE_TYPE (operand))))) | |
4816c593 | 1445 | cxx_readonly_error (operand, lv_asm); |
5544530a | 1446 | |
74f0c611 RH |
1447 | constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); |
1448 | oconstraints[i] = constraint; | |
1449 | ||
1450 | if (parse_output_constraint (&constraint, i, ninputs, noutputs, | |
1451 | &allows_mem, &allows_reg, &is_inout)) | |
1452 | { | |
1453 | /* If the operand is going to end up in memory, | |
1454 | mark it addressable. */ | |
1455 | if (!allows_reg && !cxx_mark_addressable (operand)) | |
1456 | operand = error_mark_node; | |
1457 | } | |
1458 | else | |
1459 | operand = error_mark_node; | |
1460 | ||
1461 | TREE_VALUE (t) = operand; | |
1462 | } | |
1463 | ||
1464 | for (i = 0, t = input_operands; t; ++i, t = TREE_CHAIN (t)) | |
1465 | { | |
1466 | constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t))); | |
0ab19cbc JJ |
1467 | bool constraint_parsed |
1468 | = parse_input_constraint (&constraint, i, ninputs, noutputs, 0, | |
1469 | oconstraints, &allows_mem, &allows_reg); | |
1470 | /* If the operand is going to end up in memory, don't call | |
1471 | decay_conversion. */ | |
1472 | if (constraint_parsed && !allows_reg && allows_mem) | |
1473 | operand = mark_lvalue_use (TREE_VALUE (t)); | |
1474 | else | |
1475 | operand = decay_conversion (TREE_VALUE (t), tf_warning_or_error); | |
74f0c611 | 1476 | |
40b18c0a MM |
1477 | /* If the type of the operand hasn't been determined (e.g., |
1478 | because it involves an overloaded function), then issue | |
1479 | an error message. There's no context available to | |
1480 | resolve the overloading. */ | |
74f0c611 | 1481 | if (TREE_TYPE (operand) == unknown_type_node) |
40b18c0a | 1482 | { |
c8094d83 | 1483 | error ("type of asm operand %qE could not be determined", |
0cbd7506 | 1484 | TREE_VALUE (t)); |
74f0c611 | 1485 | operand = error_mark_node; |
40b18c0a | 1486 | } |
40b18c0a | 1487 | |
0ab19cbc | 1488 | if (constraint_parsed) |
40b18c0a | 1489 | { |
74f0c611 RH |
1490 | /* If the operand is going to end up in memory, |
1491 | mark it addressable. */ | |
b4c33883 AP |
1492 | if (!allows_reg && allows_mem) |
1493 | { | |
1494 | /* Strip the nops as we allow this case. FIXME, this really | |
1495 | should be rejected or made deprecated. */ | |
1496 | STRIP_NOPS (operand); | |
1497 | if (!cxx_mark_addressable (operand)) | |
1498 | operand = error_mark_node; | |
1499 | } | |
6760071f JJ |
1500 | else if (!allows_reg && !allows_mem) |
1501 | { | |
1502 | /* If constraint allows neither register nor memory, | |
1503 | try harder to get a constant. */ | |
1504 | tree constop = maybe_constant_value (operand); | |
1505 | if (TREE_CONSTANT (constop)) | |
1506 | operand = constop; | |
1507 | } | |
40b18c0a | 1508 | } |
74f0c611 RH |
1509 | else |
1510 | operand = error_mark_node; | |
40b18c0a | 1511 | |
74f0c611 | 1512 | TREE_VALUE (t) = operand; |
40b18c0a MM |
1513 | } |
1514 | } | |
abfc8a36 | 1515 | |
c2255bc4 | 1516 | r = build_stmt (input_location, ASM_EXPR, string, |
0dfdeca6 | 1517 | output_operands, input_operands, |
1c384bf1 | 1518 | clobbers, labels); |
5544530a | 1519 | ASM_VOLATILE_P (r) = volatile_p || noutputs == 0; |
0ad28dde | 1520 | r = maybe_cleanup_point_expr_void (r); |
3e4d04a1 | 1521 | return add_stmt (r); |
ad321293 | 1522 | } |
b4c4a9ec | 1523 | |
5bca4e80 | 1524 | /* Finish a label with the indicated NAME. Returns the new label. */ |
f01b0acb | 1525 | |
a723baf1 | 1526 | tree |
3a978d72 | 1527 | finish_label_stmt (tree name) |
f01b0acb | 1528 | { |
5b030314 | 1529 | tree decl = define_label (input_location, name); |
417fa55b | 1530 | |
5bca4e80 | 1531 | if (decl == error_mark_node) |
417fa55b LM |
1532 | return error_mark_node; |
1533 | ||
c2255bc4 | 1534 | add_stmt (build_stmt (input_location, LABEL_EXPR, decl)); |
5bca4e80 ILT |
1535 | |
1536 | return decl; | |
f01b0acb MM |
1537 | } |
1538 | ||
acef433b MM |
1539 | /* Finish a series of declarations for local labels. G++ allows users |
1540 | to declare "local" labels, i.e., labels with scope. This extension | |
1541 | is useful when writing code involving statement-expressions. */ | |
1542 | ||
1543 | void | |
3a978d72 | 1544 | finish_label_decl (tree name) |
acef433b | 1545 | { |
a6d76a95 PC |
1546 | if (!at_function_scope_p ()) |
1547 | { | |
1548 | error ("__label__ declarations are only allowed in function scopes"); | |
1549 | return; | |
1550 | } | |
1551 | ||
1552 | add_decl_expr (declare_local_label (name)); | |
acef433b MM |
1553 | } |
1554 | ||
659e5a7a | 1555 | /* When DECL goes out of scope, make sure that CLEANUP is executed. */ |
f1dedc31 | 1556 | |
c8094d83 | 1557 | void |
3a978d72 | 1558 | finish_decl_cleanup (tree decl, tree cleanup) |
f1dedc31 | 1559 | { |
325c3691 | 1560 | push_cleanup (decl, cleanup, false); |
35b1567d BC |
1561 | } |
1562 | ||
659e5a7a | 1563 | /* If the current scope exits with an exception, run CLEANUP. */ |
24bef158 | 1564 | |
659e5a7a | 1565 | void |
3a978d72 | 1566 | finish_eh_cleanup (tree cleanup) |
24bef158 | 1567 | { |
325c3691 | 1568 | push_cleanup (NULL, cleanup, true); |
35b1567d BC |
1569 | } |
1570 | ||
2282d28d MM |
1571 | /* The MEM_INITS is a list of mem-initializers, in reverse of the |
1572 | order they were written by the user. Each node is as for | |
1573 | emit_mem_initializers. */ | |
bf3428d0 MM |
1574 | |
1575 | void | |
2282d28d | 1576 | finish_mem_initializers (tree mem_inits) |
bf3428d0 | 1577 | { |
2282d28d MM |
1578 | /* Reorder the MEM_INITS so that they are in the order they appeared |
1579 | in the source program. */ | |
1580 | mem_inits = nreverse (mem_inits); | |
bf3428d0 | 1581 | |
a0de9d20 | 1582 | if (processing_template_decl) |
5d80a306 DG |
1583 | { |
1584 | tree mem; | |
1585 | ||
1586 | for (mem = mem_inits; mem; mem = TREE_CHAIN (mem)) | |
1587 | { | |
1588 | /* If the TREE_PURPOSE is a TYPE_PACK_EXPANSION, skip the | |
1589 | check for bare parameter packs in the TREE_VALUE, because | |
1590 | any parameter packs in the TREE_VALUE have already been | |
1591 | bound as part of the TREE_PURPOSE. See | |
1592 | make_pack_expansion for more information. */ | |
4439d02f | 1593 | if (TREE_CODE (TREE_PURPOSE (mem)) != TYPE_PACK_EXPANSION |
7b3e2d46 | 1594 | && check_for_bare_parameter_packs (TREE_VALUE (mem))) |
4439d02f | 1595 | TREE_VALUE (mem) = error_mark_node; |
5d80a306 DG |
1596 | } |
1597 | ||
f330f599 PC |
1598 | add_stmt (build_min_nt_loc (UNKNOWN_LOCATION, |
1599 | CTOR_INITIALIZER, mem_inits)); | |
5d80a306 | 1600 | } |
cdd2559c | 1601 | else |
2282d28d | 1602 | emit_mem_initializers (mem_inits); |
558475f0 MM |
1603 | } |
1604 | ||
10c6dc8e JM |
1605 | /* Obfuscate EXPR if it looks like an id-expression or member access so |
1606 | that the call to finish_decltype in do_auto_deduction will give the | |
1607 | right result. */ | |
1608 | ||
1609 | tree | |
1610 | force_paren_expr (tree expr) | |
1611 | { | |
1612 | /* This is only needed for decltype(auto) in C++14. */ | |
e4276ba5 | 1613 | if (cxx_dialect < cxx14) |
10c6dc8e JM |
1614 | return expr; |
1615 | ||
0e4cf887 JM |
1616 | /* If we're in unevaluated context, we can't be deducing a |
1617 | return/initializer type, so we don't need to mess with this. */ | |
1618 | if (cp_unevaluated_operand) | |
1619 | return expr; | |
1620 | ||
10c6dc8e JM |
1621 | if (!DECL_P (expr) && TREE_CODE (expr) != COMPONENT_REF |
1622 | && TREE_CODE (expr) != SCOPE_REF) | |
1623 | return expr; | |
1624 | ||
0e4cf887 JM |
1625 | if (TREE_CODE (expr) == COMPONENT_REF) |
1626 | REF_PARENTHESIZED_P (expr) = true; | |
1627 | else if (type_dependent_expression_p (expr)) | |
10c6dc8e JM |
1628 | expr = build1 (PAREN_EXPR, TREE_TYPE (expr), expr); |
1629 | else | |
1630 | { | |
1631 | cp_lvalue_kind kind = lvalue_kind (expr); | |
1632 | if ((kind & ~clk_class) != clk_none) | |
1633 | { | |
1634 | tree type = unlowered_expr_type (expr); | |
1635 | bool rval = !!(kind & clk_rvalueref); | |
1636 | type = cp_build_reference_type (type, rval); | |
0e4cf887 | 1637 | expr = build_static_cast (type, expr, tf_error); |
10c6dc8e JM |
1638 | } |
1639 | } | |
1640 | ||
1641 | return expr; | |
1642 | } | |
1643 | ||
b4c4a9ec MM |
1644 | /* Finish a parenthesized expression EXPR. */ |
1645 | ||
1646 | tree | |
3a978d72 | 1647 | finish_parenthesized_expr (tree expr) |
b4c4a9ec | 1648 | { |
6615c446 | 1649 | if (EXPR_P (expr)) |
78ef5b89 | 1650 | /* This inhibits warnings in c_common_truthvalue_conversion. */ |
31ec7d2f | 1651 | TREE_NO_WARNING (expr) = 1; |
b4c4a9ec | 1652 | |
d816a3ba JM |
1653 | if (TREE_CODE (expr) == OFFSET_REF |
1654 | || TREE_CODE (expr) == SCOPE_REF) | |
19420d00 NS |
1655 | /* [expr.unary.op]/3 The qualified id of a pointer-to-member must not be |
1656 | enclosed in parentheses. */ | |
1657 | PTRMEM_OK_P (expr) = 0; | |
c8094d83 | 1658 | |
7a8380ae NS |
1659 | if (TREE_CODE (expr) == STRING_CST) |
1660 | PAREN_STRING_LITERAL_P (expr) = 1; | |
c8094d83 | 1661 | |
10c6dc8e JM |
1662 | expr = force_paren_expr (expr); |
1663 | ||
b4c4a9ec MM |
1664 | return expr; |
1665 | } | |
1666 | ||
a723baf1 MM |
1667 | /* Finish a reference to a non-static data member (DECL) that is not |
1668 | preceded by `.' or `->'. */ | |
1669 | ||
1670 | tree | |
a3f10e50 | 1671 | finish_non_static_data_member (tree decl, tree object, tree qualifying_scope) |
a723baf1 | 1672 | { |
50bc768d | 1673 | gcc_assert (TREE_CODE (decl) == FIELD_DECL); |
a723baf1 | 1674 | |
2defb926 | 1675 | if (!object) |
51fc2d02 | 1676 | { |
51fc2d02 JM |
1677 | tree scope = qualifying_scope; |
1678 | if (scope == NULL_TREE) | |
1679 | scope = context_for_name_lookup (decl); | |
1680 | object = maybe_dummy_object (scope, NULL); | |
1681 | } | |
1682 | ||
0b360a07 | 1683 | object = maybe_resolve_dummy (object, true); |
1496e7d6 PC |
1684 | if (object == error_mark_node) |
1685 | return error_mark_node; | |
1686 | ||
2defb926 JM |
1687 | /* DR 613: Can use non-static data members without an associated |
1688 | object in sizeof/decltype/alignof. */ | |
1689 | if (is_dummy_object (object) && cp_unevaluated_operand == 0 | |
1690 | && (!processing_template_decl || !current_class_ref)) | |
a723baf1 | 1691 | { |
c8094d83 | 1692 | if (current_function_decl |
a723baf1 | 1693 | && DECL_STATIC_FUNCTION_P (current_function_decl)) |
dee15844 | 1694 | error ("invalid use of member %q+D in static member function", decl); |
a723baf1 | 1695 | else |
dee15844 | 1696 | error ("invalid use of non-static data member %q+D", decl); |
a723baf1 MM |
1697 | error ("from this location"); |
1698 | ||
1699 | return error_mark_node; | |
1700 | } | |
d5f4eddd | 1701 | |
51fc2d02 JM |
1702 | if (current_class_ptr) |
1703 | TREE_USED (current_class_ptr) = 1; | |
58e1d54c | 1704 | if (processing_template_decl && !qualifying_scope) |
a723baf1 | 1705 | { |
a3f10e50 | 1706 | tree type = TREE_TYPE (decl); |
a723baf1 | 1707 | |
a3f10e50 | 1708 | if (TREE_CODE (type) == REFERENCE_TYPE) |
2516ccfe | 1709 | /* Quals on the object don't matter. */; |
2993d08a JM |
1710 | else if (PACK_EXPANSION_P (type)) |
1711 | /* Don't bother trying to represent this. */ | |
1712 | type = NULL_TREE; | |
a3f10e50 NS |
1713 | else |
1714 | { | |
f4f206f4 | 1715 | /* Set the cv qualifiers. */ |
bab5167f | 1716 | int quals = cp_type_quals (TREE_TYPE (object)); |
c8094d83 | 1717 | |
a3f10e50 NS |
1718 | if (DECL_MUTABLE_P (decl)) |
1719 | quals &= ~TYPE_QUAL_CONST; | |
9e95d15f | 1720 | |
a3f10e50 NS |
1721 | quals |= cp_type_quals (TREE_TYPE (decl)); |
1722 | type = cp_build_qualified_type (type, quals); | |
1723 | } | |
c8094d83 | 1724 | |
2516ccfe JM |
1725 | return (convert_from_reference |
1726 | (build_min (COMPONENT_REF, type, object, decl, NULL_TREE))); | |
a3f10e50 | 1727 | } |
ab11c13f JM |
1728 | /* If PROCESSING_TEMPLATE_DECL is nonzero here, then |
1729 | QUALIFYING_SCOPE is also non-null. Wrap this in a SCOPE_REF | |
1730 | for now. */ | |
1731 | else if (processing_template_decl) | |
1732 | return build_qualified_name (TREE_TYPE (decl), | |
1733 | qualifying_scope, | |
c5c8755a | 1734 | decl, |
ab11c13f | 1735 | /*template_p=*/false); |
a3f10e50 NS |
1736 | else |
1737 | { | |
1738 | tree access_type = TREE_TYPE (object); | |
9f01ded6 | 1739 | |
02022f3a | 1740 | perform_or_defer_access_check (TYPE_BINFO (access_type), decl, |
0e69fdf0 | 1741 | decl, tf_warning_or_error); |
a723baf1 MM |
1742 | |
1743 | /* If the data member was named `C::M', convert `*this' to `C' | |
1744 | first. */ | |
1745 | if (qualifying_scope) | |
1746 | { | |
1747 | tree binfo = NULL_TREE; | |
1748 | object = build_scoped_ref (object, qualifying_scope, | |
1749 | &binfo); | |
1750 | } | |
1751 | ||
1752 | return build_class_member_access_expr (object, decl, | |
1753 | /*access_path=*/NULL_TREE, | |
5ade1ed2 DG |
1754 | /*preserve_reference=*/false, |
1755 | tf_warning_or_error); | |
a723baf1 MM |
1756 | } |
1757 | } | |
1758 | ||
aa373032 DS |
1759 | /* If we are currently parsing a template and we encountered a typedef |
1760 | TYPEDEF_DECL that is being accessed though CONTEXT, this function | |
1761 | adds the typedef to a list tied to the current template. | |
b52259e1 | 1762 | At template instantiation time, that list is walked and access check |
aa373032 DS |
1763 | performed for each typedef. |
1764 | LOCATION is the location of the usage point of TYPEDEF_DECL. */ | |
1765 | ||
1766 | void | |
1767 | add_typedef_to_current_template_for_access_check (tree typedef_decl, | |
1768 | tree context, | |
1769 | location_t location) | |
1770 | { | |
1771 | tree template_info = NULL; | |
1772 | tree cs = current_scope (); | |
1773 | ||
1774 | if (!is_typedef_decl (typedef_decl) | |
1775 | || !context | |
1776 | || !CLASS_TYPE_P (context) | |
1777 | || !cs) | |
1778 | return; | |
1779 | ||
1780 | if (CLASS_TYPE_P (cs) || TREE_CODE (cs) == FUNCTION_DECL) | |
1781 | template_info = get_template_info (cs); | |
1782 | ||
1783 | if (template_info | |
1784 | && TI_TEMPLATE (template_info) | |
1785 | && !currently_open_class (context)) | |
1786 | append_type_to_template_for_access_check (cs, typedef_decl, | |
1787 | context, location); | |
1788 | } | |
1789 | ||
ee76b931 MM |
1790 | /* DECL was the declaration to which a qualified-id resolved. Issue |
1791 | an error message if it is not accessible. If OBJECT_TYPE is | |
1792 | non-NULL, we have just seen `x->' or `x.' and OBJECT_TYPE is the | |
1793 | type of `*x', or `x', respectively. If the DECL was named as | |
1794 | `A::B' then NESTED_NAME_SPECIFIER is `A'. */ | |
1795 | ||
1796 | void | |
c8094d83 MS |
1797 | check_accessibility_of_qualified_id (tree decl, |
1798 | tree object_type, | |
ee76b931 MM |
1799 | tree nested_name_specifier) |
1800 | { | |
1801 | tree scope; | |
1802 | tree qualifying_type = NULL_TREE; | |
95b4aca6 | 1803 | |
d0940d56 DS |
1804 | /* If we are parsing a template declaration and if decl is a typedef, |
1805 | add it to a list tied to the template. | |
1806 | At template instantiation time, that list will be walked and | |
1807 | access check performed. */ | |
aa373032 DS |
1808 | add_typedef_to_current_template_for_access_check (decl, |
1809 | nested_name_specifier | |
1810 | ? nested_name_specifier | |
1811 | : DECL_CONTEXT (decl), | |
1812 | input_location); | |
d0940d56 | 1813 | |
77880ae4 | 1814 | /* If we're not checking, return immediately. */ |
95b4aca6 NS |
1815 | if (deferred_access_no_check) |
1816 | return; | |
c8094d83 | 1817 | |
ee76b931 MM |
1818 | /* Determine the SCOPE of DECL. */ |
1819 | scope = context_for_name_lookup (decl); | |
1820 | /* If the SCOPE is not a type, then DECL is not a member. */ | |
1821 | if (!TYPE_P (scope)) | |
1822 | return; | |
1823 | /* Compute the scope through which DECL is being accessed. */ | |
c8094d83 | 1824 | if (object_type |
ee76b931 MM |
1825 | /* OBJECT_TYPE might not be a class type; consider: |
1826 | ||
1827 | class A { typedef int I; }; | |
1828 | I *p; | |
1829 | p->A::I::~I(); | |
1830 | ||
0cbd7506 | 1831 | In this case, we will have "A::I" as the DECL, but "I" as the |
ee76b931 MM |
1832 | OBJECT_TYPE. */ |
1833 | && CLASS_TYPE_P (object_type) | |
1834 | && DERIVED_FROM_P (scope, object_type)) | |
1835 | /* If we are processing a `->' or `.' expression, use the type of the | |
1836 | left-hand side. */ | |
1837 | qualifying_type = object_type; | |
1838 | else if (nested_name_specifier) | |
1839 | { | |
1840 | /* If the reference is to a non-static member of the | |
1841 | current class, treat it as if it were referenced through | |
1842 | `this'. */ | |
adb50dfb | 1843 | tree ct; |
ee76b931 MM |
1844 | if (DECL_NONSTATIC_MEMBER_P (decl) |
1845 | && current_class_ptr | |
adb50dfb VV |
1846 | && DERIVED_FROM_P (scope, ct = current_nonlambda_class_type ())) |
1847 | qualifying_type = ct; | |
ee76b931 MM |
1848 | /* Otherwise, use the type indicated by the |
1849 | nested-name-specifier. */ | |
1850 | else | |
1851 | qualifying_type = nested_name_specifier; | |
1852 | } | |
1853 | else | |
1854 | /* Otherwise, the name must be from the current class or one of | |
1855 | its bases. */ | |
1856 | qualifying_type = currently_open_derived_class (scope); | |
1857 | ||
fc429748 MM |
1858 | if (qualifying_type |
1859 | /* It is possible for qualifying type to be a TEMPLATE_TYPE_PARM | |
1860 | or similar in a default argument value. */ | |
1861 | && CLASS_TYPE_P (qualifying_type) | |
1862 | && !dependent_type_p (qualifying_type)) | |
02022f3a | 1863 | perform_or_defer_access_check (TYPE_BINFO (qualifying_type), decl, |
0e69fdf0 | 1864 | decl, tf_warning_or_error); |
ee76b931 MM |
1865 | } |
1866 | ||
1867 | /* EXPR is the result of a qualified-id. The QUALIFYING_CLASS was the | |
1868 | class named to the left of the "::" operator. DONE is true if this | |
1869 | expression is a complete postfix-expression; it is false if this | |
1870 | expression is followed by '->', '[', '(', etc. ADDRESS_P is true | |
02ed62dd MM |
1871 | iff this expression is the operand of '&'. TEMPLATE_P is true iff |
1872 | the qualified-id was of the form "A::template B". TEMPLATE_ARG_P | |
1873 | is true iff this qualified name appears as a template argument. */ | |
ee76b931 MM |
1874 | |
1875 | tree | |
3db45ab5 MS |
1876 | finish_qualified_id_expr (tree qualifying_class, |
1877 | tree expr, | |
02ed62dd | 1878 | bool done, |
3db45ab5 | 1879 | bool address_p, |
02ed62dd | 1880 | bool template_p, |
a378996b PC |
1881 | bool template_arg_p, |
1882 | tsubst_flags_t complain) | |
ee76b931 | 1883 | { |
d4f0f205 MM |
1884 | gcc_assert (TYPE_P (qualifying_class)); |
1885 | ||
5e08432e MM |
1886 | if (error_operand_p (expr)) |
1887 | return error_mark_node; | |
1888 | ||
2e649151 PC |
1889 | if ((DECL_P (expr) || BASELINK_P (expr)) |
1890 | && !mark_used (expr, complain)) | |
1891 | return error_mark_node; | |
d4f0f205 | 1892 | |
02ed62dd MM |
1893 | if (template_p) |
1894 | check_template_keyword (expr); | |
1895 | ||
ee76b931 MM |
1896 | /* If EXPR occurs as the operand of '&', use special handling that |
1897 | permits a pointer-to-member. */ | |
1898 | if (address_p && done) | |
1899 | { | |
1900 | if (TREE_CODE (expr) == SCOPE_REF) | |
1901 | expr = TREE_OPERAND (expr, 1); | |
c8094d83 | 1902 | expr = build_offset_ref (qualifying_class, expr, |
a378996b | 1903 | /*address_p=*/true, complain); |
ee76b931 MM |
1904 | return expr; |
1905 | } | |
1906 | ||
d348f172 JM |
1907 | /* No need to check access within an enum. */ |
1908 | if (TREE_CODE (qualifying_class) == ENUMERAL_TYPE) | |
1909 | return expr; | |
1910 | ||
02ed62dd MM |
1911 | /* Within the scope of a class, turn references to non-static |
1912 | members into expression of the form "this->...". */ | |
1913 | if (template_arg_p) | |
1914 | /* But, within a template argument, we do not want make the | |
1915 | transformation, as there is no "this" pointer. */ | |
1916 | ; | |
1917 | else if (TREE_CODE (expr) == FIELD_DECL) | |
43854f72 SB |
1918 | { |
1919 | push_deferring_access_checks (dk_no_check); | |
2defb926 | 1920 | expr = finish_non_static_data_member (expr, NULL_TREE, |
43854f72 SB |
1921 | qualifying_class); |
1922 | pop_deferring_access_checks (); | |
1923 | } | |
ee76b931 MM |
1924 | else if (BASELINK_P (expr) && !processing_template_decl) |
1925 | { | |
ee76b931 | 1926 | /* See if any of the functions are non-static members. */ |
7e361ae6 | 1927 | /* If so, the expression may be relative to 'this'. */ |
294e855f | 1928 | if (!shared_member_p (expr) |
0ef811d7 JM |
1929 | && current_class_ptr |
1930 | && DERIVED_FROM_P (qualifying_class, | |
1931 | current_nonlambda_class_type ())) | |
c8094d83 | 1932 | expr = (build_class_member_access_expr |
0ef811d7 | 1933 | (maybe_dummy_object (qualifying_class, NULL), |
ee76b931 MM |
1934 | expr, |
1935 | BASELINK_ACCESS_BINFO (expr), | |
5ade1ed2 | 1936 | /*preserve_reference=*/false, |
a378996b | 1937 | complain)); |
ee76b931 | 1938 | else if (done) |
a5ac359a MM |
1939 | /* The expression is a qualified name whose address is not |
1940 | being taken. */ | |
a378996b PC |
1941 | expr = build_offset_ref (qualifying_class, expr, /*address_p=*/false, |
1942 | complain); | |
ee76b931 | 1943 | } |
e467c9d2 JM |
1944 | else if (BASELINK_P (expr)) |
1945 | ; | |
1946 | else | |
1947 | { | |
e467c9d2 JM |
1948 | /* In a template, return a SCOPE_REF for most qualified-ids |
1949 | so that we can check access at instantiation time. But if | |
1950 | we're looking at a member of the current instantiation, we | |
1951 | know we have access and building up the SCOPE_REF confuses | |
1952 | non-type template argument handling. */ | |
1953 | if (processing_template_decl | |
1954 | && !currently_open_class (qualifying_class)) | |
1955 | expr = build_qualified_name (TREE_TYPE (expr), | |
1956 | qualifying_class, expr, | |
1957 | template_p); | |
1e8671f7 JM |
1958 | |
1959 | expr = convert_from_reference (expr); | |
e467c9d2 | 1960 | } |
ee76b931 MM |
1961 | |
1962 | return expr; | |
1963 | } | |
1964 | ||
b69b1501 MM |
1965 | /* Begin a statement-expression. The value returned must be passed to |
1966 | finish_stmt_expr. */ | |
b4c4a9ec | 1967 | |
c8094d83 | 1968 | tree |
3a978d72 | 1969 | begin_stmt_expr (void) |
b4c4a9ec | 1970 | { |
325c3691 | 1971 | return push_stmt_list (); |
35b1567d BC |
1972 | } |
1973 | ||
a5bcc582 | 1974 | /* Process the final expression of a statement expression. EXPR can be |
85a56c9d MM |
1975 | NULL, if the final expression is empty. Return a STATEMENT_LIST |
1976 | containing all the statements in the statement-expression, or | |
1977 | ERROR_MARK_NODE if there was an error. */ | |
a5bcc582 NS |
1978 | |
1979 | tree | |
325c3691 | 1980 | finish_stmt_expr_expr (tree expr, tree stmt_expr) |
a5bcc582 | 1981 | { |
72e4661a | 1982 | if (error_operand_p (expr)) |
76b9a2a1 AP |
1983 | { |
1984 | /* The type of the statement-expression is the type of the last | |
1985 | expression. */ | |
1986 | TREE_TYPE (stmt_expr) = error_mark_node; | |
1987 | return error_mark_node; | |
1988 | } | |
c8094d83 | 1989 | |
85a56c9d | 1990 | /* If the last statement does not have "void" type, then the value |
3db45ab5 | 1991 | of the last statement is the value of the entire expression. */ |
a5bcc582 NS |
1992 | if (expr) |
1993 | { | |
c6c7698d JM |
1994 | tree type = TREE_TYPE (expr); |
1995 | ||
1996 | if (processing_template_decl) | |
1997 | { | |
c2255bc4 | 1998 | expr = build_stmt (input_location, EXPR_STMT, expr); |
c6c7698d JM |
1999 | expr = add_stmt (expr); |
2000 | /* Mark the last statement so that we can recognize it as such at | |
2001 | template-instantiation time. */ | |
2002 | EXPR_STMT_STMT_EXPR_RESULT (expr) = 1; | |
2003 | } | |
2004 | else if (VOID_TYPE_P (type)) | |
a5bcc582 | 2005 | { |
c6c7698d JM |
2006 | /* Just treat this like an ordinary statement. */ |
2007 | expr = finish_expr_stmt (expr); | |
2008 | } | |
2009 | else | |
2010 | { | |
2011 | /* It actually has a value we need to deal with. First, force it | |
2012 | to be an rvalue so that we won't need to build up a copy | |
2013 | constructor call later when we try to assign it to something. */ | |
574cfaa4 | 2014 | expr = force_rvalue (expr, tf_warning_or_error); |
85a56c9d MM |
2015 | if (error_operand_p (expr)) |
2016 | return error_mark_node; | |
c6c7698d JM |
2017 | |
2018 | /* Update for array-to-pointer decay. */ | |
2692eb7d | 2019 | type = TREE_TYPE (expr); |
c6c7698d JM |
2020 | |
2021 | /* Wrap it in a CLEANUP_POINT_EXPR and add it to the list like a | |
2022 | normal statement, but don't convert to void or actually add | |
2023 | the EXPR_STMT. */ | |
2024 | if (TREE_CODE (expr) != CLEANUP_POINT_EXPR) | |
2025 | expr = maybe_cleanup_point_expr (expr); | |
2026 | add_stmt (expr); | |
85a56c9d | 2027 | } |
c6c7698d | 2028 | |
85a56c9d MM |
2029 | /* The type of the statement-expression is the type of the last |
2030 | expression. */ | |
2031 | TREE_TYPE (stmt_expr) = type; | |
a5bcc582 | 2032 | } |
c8094d83 | 2033 | |
85a56c9d | 2034 | return stmt_expr; |
a5bcc582 NS |
2035 | } |
2036 | ||
303b7406 NS |
2037 | /* Finish a statement-expression. EXPR should be the value returned |
2038 | by the previous begin_stmt_expr. Returns an expression | |
2039 | representing the statement-expression. */ | |
b4c4a9ec | 2040 | |
c8094d83 | 2041 | tree |
325c3691 | 2042 | finish_stmt_expr (tree stmt_expr, bool has_no_scope) |
b4c4a9ec | 2043 | { |
85a56c9d MM |
2044 | tree type; |
2045 | tree result; | |
325c3691 | 2046 | |
85a56c9d | 2047 | if (error_operand_p (stmt_expr)) |
d7b5fa31 JJ |
2048 | { |
2049 | pop_stmt_list (stmt_expr); | |
2050 | return error_mark_node; | |
2051 | } | |
325c3691 | 2052 | |
85a56c9d | 2053 | gcc_assert (TREE_CODE (stmt_expr) == STATEMENT_LIST); |
325c3691 | 2054 | |
85a56c9d MM |
2055 | type = TREE_TYPE (stmt_expr); |
2056 | result = pop_stmt_list (stmt_expr); | |
c6c7698d | 2057 | TREE_TYPE (result) = type; |
6f80451c | 2058 | |
a5bcc582 | 2059 | if (processing_template_decl) |
325c3691 RH |
2060 | { |
2061 | result = build_min (STMT_EXPR, type, result); | |
2062 | TREE_SIDE_EFFECTS (result) = 1; | |
2063 | STMT_EXPR_NO_SCOPE (result) = has_no_scope; | |
2064 | } | |
c6c7698d | 2065 | else if (CLASS_TYPE_P (type)) |
a5bcc582 | 2066 | { |
c6c7698d JM |
2067 | /* Wrap the statement-expression in a TARGET_EXPR so that the |
2068 | temporary object created by the final expression is destroyed at | |
2069 | the end of the full-expression containing the | |
2070 | statement-expression. */ | |
574cfaa4 | 2071 | result = force_target_expr (type, result, tf_warning_or_error); |
a5bcc582 | 2072 | } |
325c3691 | 2073 | |
b4c4a9ec MM |
2074 | return result; |
2075 | } | |
2076 | ||
c2acde1e JM |
2077 | /* Returns the expression which provides the value of STMT_EXPR. */ |
2078 | ||
2079 | tree | |
2080 | stmt_expr_value_expr (tree stmt_expr) | |
2081 | { | |
2082 | tree t = STMT_EXPR_STMT (stmt_expr); | |
2083 | ||
2084 | if (TREE_CODE (t) == BIND_EXPR) | |
2085 | t = BIND_EXPR_BODY (t); | |
2086 | ||
9de0e916 | 2087 | if (TREE_CODE (t) == STATEMENT_LIST && STATEMENT_LIST_TAIL (t)) |
c2acde1e JM |
2088 | t = STATEMENT_LIST_TAIL (t)->stmt; |
2089 | ||
2090 | if (TREE_CODE (t) == EXPR_STMT) | |
2091 | t = EXPR_STMT_EXPR (t); | |
2092 | ||
2093 | return t; | |
2094 | } | |
2095 | ||
9af66ed1 DS |
2096 | /* Return TRUE iff EXPR_STMT is an empty list of |
2097 | expression statements. */ | |
2098 | ||
2099 | bool | |
2100 | empty_expr_stmt_p (tree expr_stmt) | |
2101 | { | |
2102 | tree body = NULL_TREE; | |
2103 | ||
632f2871 | 2104 | if (expr_stmt == void_node) |
489df541 DS |
2105 | return true; |
2106 | ||
9af66ed1 DS |
2107 | if (expr_stmt) |
2108 | { | |
2109 | if (TREE_CODE (expr_stmt) == EXPR_STMT) | |
2110 | body = EXPR_STMT_EXPR (expr_stmt); | |
2111 | else if (TREE_CODE (expr_stmt) == STATEMENT_LIST) | |
2112 | body = expr_stmt; | |
2113 | } | |
2114 | ||
489df541 DS |
2115 | if (body) |
2116 | { | |
2117 | if (TREE_CODE (body) == STATEMENT_LIST) | |
2118 | return tsi_end_p (tsi_start (body)); | |
2119 | else | |
2120 | return empty_expr_stmt_p (body); | |
2121 | } | |
9af66ed1 DS |
2122 | return false; |
2123 | } | |
2124 | ||
b3445994 | 2125 | /* Perform Koenig lookup. FN is the postfix-expression representing |
fa531100 | 2126 | the function (or functions) to call; ARGS are the arguments to the |
cdc23b1b | 2127 | call. Returns the functions to be considered by overload resolution. */ |
b3445994 MM |
2128 | |
2129 | tree | |
cdc23b1b | 2130 | perform_koenig_lookup (tree fn, vec<tree, va_gc> *args, |
94df301f | 2131 | tsubst_flags_t complain) |
b3445994 MM |
2132 | { |
2133 | tree identifier = NULL_TREE; | |
2134 | tree functions = NULL_TREE; | |
d095e03c | 2135 | tree tmpl_args = NULL_TREE; |
4e6a9725 | 2136 | bool template_id = false; |
d095e03c JM |
2137 | |
2138 | if (TREE_CODE (fn) == TEMPLATE_ID_EXPR) | |
2139 | { | |
4e6a9725 JM |
2140 | /* Use a separate flag to handle null args. */ |
2141 | template_id = true; | |
d095e03c JM |
2142 | tmpl_args = TREE_OPERAND (fn, 1); |
2143 | fn = TREE_OPERAND (fn, 0); | |
2144 | } | |
b3445994 MM |
2145 | |
2146 | /* Find the name of the overloaded function. */ | |
9dc6f476 | 2147 | if (identifier_p (fn)) |
b3445994 MM |
2148 | identifier = fn; |
2149 | else if (is_overloaded_fn (fn)) | |
2150 | { | |
2151 | functions = fn; | |
2152 | identifier = DECL_NAME (get_first_fn (functions)); | |
2153 | } | |
2154 | else if (DECL_P (fn)) | |
2155 | { | |
2156 | functions = fn; | |
2157 | identifier = DECL_NAME (fn); | |
2158 | } | |
2159 | ||
2160 | /* A call to a namespace-scope function using an unqualified name. | |
2161 | ||
2162 | Do Koenig lookup -- unless any of the arguments are | |
2163 | type-dependent. */ | |
d095e03c JM |
2164 | if (!any_type_dependent_arguments_p (args) |
2165 | && !any_dependent_template_arguments_p (tmpl_args)) | |
b3445994 | 2166 | { |
cdc23b1b | 2167 | fn = lookup_arg_dependent (identifier, functions, args); |
b3445994 | 2168 | if (!fn) |
94df301f JM |
2169 | { |
2170 | /* The unqualified name could not be resolved. */ | |
2171 | if (complain) | |
2172 | fn = unqualified_fn_lookup_error (identifier); | |
2173 | else | |
2174 | fn = identifier; | |
2175 | } | |
b3445994 | 2176 | } |
b3445994 | 2177 | |
4e6a9725 JM |
2178 | if (fn && template_id) |
2179 | fn = build2 (TEMPLATE_ID_EXPR, unknown_type_node, fn, tmpl_args); | |
d095e03c | 2180 | |
b3445994 MM |
2181 | return fn; |
2182 | } | |
2183 | ||
c166b898 ILT |
2184 | /* Generate an expression for `FN (ARGS)'. This may change the |
2185 | contents of ARGS. | |
4ba126e4 MM |
2186 | |
2187 | If DISALLOW_VIRTUAL is true, the call to FN will be not generated | |
2188 | as a virtual call, even if FN is virtual. (This flag is set when | |
2189 | encountering an expression where the function name is explicitly | |
2190 | qualified. For example a call to `X::f' never generates a virtual | |
2191 | call.) | |
2192 | ||
2193 | Returns code for the call. */ | |
b4c4a9ec | 2194 | |
c8094d83 | 2195 | tree |
9771b263 | 2196 | finish_call_expr (tree fn, vec<tree, va_gc> **args, bool disallow_virtual, |
c166b898 | 2197 | bool koenig_p, tsubst_flags_t complain) |
b4c4a9ec | 2198 | { |
d17811fd MM |
2199 | tree result; |
2200 | tree orig_fn; | |
9771b263 | 2201 | vec<tree, va_gc> *orig_args = NULL; |
d17811fd | 2202 | |
c166b898 | 2203 | if (fn == error_mark_node) |
4ba126e4 MM |
2204 | return error_mark_node; |
2205 | ||
4860b874 | 2206 | gcc_assert (!TYPE_P (fn)); |
a759e627 | 2207 | |
d17811fd | 2208 | orig_fn = fn; |
d17811fd MM |
2209 | |
2210 | if (processing_template_decl) | |
2211 | { | |
1770aeed DS |
2212 | /* If the call expression is dependent, build a CALL_EXPR node |
2213 | with no type; type_dependent_expression_p recognizes | |
2214 | expressions with no type as being dependent. */ | |
d17811fd | 2215 | if (type_dependent_expression_p (fn) |
1770aeed | 2216 | || any_type_dependent_arguments_p (*args) |
712c948a JM |
2217 | /* For a non-static member function that doesn't have an |
2218 | explicit object argument, we need to specifically | |
1770aeed DS |
2219 | test the type dependency of the "this" pointer because it |
2220 | is not included in *ARGS even though it is considered to | |
2221 | be part of the list of arguments. Note that this is | |
2222 | related to CWG issues 515 and 1005. */ | |
712c948a JM |
2223 | || (TREE_CODE (fn) != COMPONENT_REF |
2224 | && non_static_member_function_p (fn) | |
1770aeed DS |
2225 | && current_class_ref |
2226 | && type_dependent_expression_p (current_class_ref))) | |
6d80c4b9 | 2227 | { |
c166b898 | 2228 | result = build_nt_call_vec (fn, *args); |
8400e75e | 2229 | SET_EXPR_LOCATION (result, EXPR_LOC_OR_LOC (fn, input_location)); |
5094a795 | 2230 | KOENIG_LOOKUP_P (result) = koenig_p; |
be461b8f JJ |
2231 | if (cfun) |
2232 | { | |
2233 | do | |
2234 | { | |
2235 | tree fndecl = OVL_CURRENT (fn); | |
2236 | if (TREE_CODE (fndecl) != FUNCTION_DECL | |
2237 | || !TREE_THIS_VOLATILE (fndecl)) | |
2238 | break; | |
2239 | fn = OVL_NEXT (fn); | |
2240 | } | |
2241 | while (fn); | |
2242 | if (!fn) | |
2243 | current_function_returns_abnormally = 1; | |
2244 | } | |
6d80c4b9 MM |
2245 | return result; |
2246 | } | |
c166b898 | 2247 | orig_args = make_tree_vector_copy (*args); |
d17811fd MM |
2248 | if (!BASELINK_P (fn) |
2249 | && TREE_CODE (fn) != PSEUDO_DTOR_EXPR | |
2250 | && TREE_TYPE (fn) != unknown_type_node) | |
2251 | fn = build_non_dependent_expr (fn); | |
c166b898 | 2252 | make_args_non_dependent (*args); |
d17811fd MM |
2253 | } |
2254 | ||
deb9642d JM |
2255 | if (TREE_CODE (fn) == COMPONENT_REF) |
2256 | { | |
2257 | tree member = TREE_OPERAND (fn, 1); | |
2258 | if (BASELINK_P (member)) | |
2259 | { | |
2260 | tree object = TREE_OPERAND (fn, 0); | |
2261 | return build_new_method_call (object, member, | |
2262 | args, NULL_TREE, | |
2263 | (disallow_virtual | |
2264 | ? LOOKUP_NORMAL | LOOKUP_NONVIRTUAL | |
2265 | : LOOKUP_NORMAL), | |
2266 | /*fn_p=*/NULL, | |
2267 | complain); | |
2268 | } | |
2269 | } | |
2270 | ||
53677b17 PC |
2271 | /* Per 13.3.1.1, '(&f)(...)' is the same as '(f)(...)'. */ |
2272 | if (TREE_CODE (fn) == ADDR_EXPR | |
2273 | && TREE_CODE (TREE_OPERAND (fn, 0)) == OVERLOAD) | |
2274 | fn = TREE_OPERAND (fn, 0); | |
2275 | ||
eff3a276 MM |
2276 | if (is_overloaded_fn (fn)) |
2277 | fn = baselink_for_fns (fn); | |
a723baf1 | 2278 | |
d17811fd | 2279 | result = NULL_TREE; |
4ba126e4 | 2280 | if (BASELINK_P (fn)) |
03d82991 | 2281 | { |
4ba126e4 MM |
2282 | tree object; |
2283 | ||
2284 | /* A call to a member function. From [over.call.func]: | |
2285 | ||
2286 | If the keyword this is in scope and refers to the class of | |
2287 | that member function, or a derived class thereof, then the | |
2288 | function call is transformed into a qualified function call | |
2289 | using (*this) as the postfix-expression to the left of the | |
2290 | . operator.... [Otherwise] a contrived object of type T | |
c8094d83 | 2291 | becomes the implied object argument. |
4ba126e4 | 2292 | |
38f1276b | 2293 | In this situation: |
4ba126e4 MM |
2294 | |
2295 | struct A { void f(); }; | |
2296 | struct B : public A {}; | |
2297 | struct C : public A { void g() { B::f(); }}; | |
2298 | ||
38f1276b JM |
2299 | "the class of that member function" refers to `A'. But 11.2 |
2300 | [class.access.base] says that we need to convert 'this' to B* as | |
2301 | part of the access, so we pass 'B' to maybe_dummy_object. */ | |
b4c4a9ec | 2302 | |
38f1276b JM |
2303 | object = maybe_dummy_object (BINFO_TYPE (BASELINK_ACCESS_BINFO (fn)), |
2304 | NULL); | |
b4c4a9ec | 2305 | |
d17811fd MM |
2306 | if (processing_template_decl) |
2307 | { | |
2308 | if (type_dependent_expression_p (object)) | |
c166b898 ILT |
2309 | { |
2310 | tree ret = build_nt_call_vec (orig_fn, orig_args); | |
2311 | release_tree_vector (orig_args); | |
2312 | return ret; | |
2313 | } | |
d17811fd MM |
2314 | object = build_non_dependent_expr (object); |
2315 | } | |
2316 | ||
2317 | result = build_new_method_call (object, fn, args, NULL_TREE, | |
c8094d83 | 2318 | (disallow_virtual |
c2aa8dc9 JM |
2319 | ? LOOKUP_NORMAL|LOOKUP_NONVIRTUAL |
2320 | : LOOKUP_NORMAL), | |
5ade1ed2 DG |
2321 | /*fn_p=*/NULL, |
2322 | complain); | |
4ba126e4 MM |
2323 | } |
2324 | else if (is_overloaded_fn (fn)) | |
16c35a1f RH |
2325 | { |
2326 | /* If the function is an overloaded builtin, resolve it. */ | |
2327 | if (TREE_CODE (fn) == FUNCTION_DECL | |
58646b77 PB |
2328 | && (DECL_BUILT_IN_CLASS (fn) == BUILT_IN_NORMAL |
2329 | || DECL_BUILT_IN_CLASS (fn) == BUILT_IN_MD)) | |
c2255bc4 | 2330 | result = resolve_overloaded_builtin (input_location, fn, *args); |
16c35a1f RH |
2331 | |
2332 | if (!result) | |
0d23cf7a JJ |
2333 | { |
2334 | if (warn_sizeof_pointer_memaccess | |
9771b263 | 2335 | && !vec_safe_is_empty (*args) |
0d23cf7a JJ |
2336 | && !processing_template_decl) |
2337 | { | |
3a785c97 JJ |
2338 | location_t sizeof_arg_loc[3]; |
2339 | tree sizeof_arg[3]; | |
2340 | unsigned int i; | |
2341 | for (i = 0; i < 3; i++) | |
2342 | { | |
2343 | tree t; | |
2344 | ||
2345 | sizeof_arg_loc[i] = UNKNOWN_LOCATION; | |
2346 | sizeof_arg[i] = NULL_TREE; | |
9771b263 | 2347 | if (i >= (*args)->length ()) |
3a785c97 | 2348 | continue; |
9771b263 | 2349 | t = (**args)[i]; |
3a785c97 JJ |
2350 | if (TREE_CODE (t) != SIZEOF_EXPR) |
2351 | continue; | |
2352 | if (SIZEOF_EXPR_TYPE_P (t)) | |
2353 | sizeof_arg[i] = TREE_TYPE (TREE_OPERAND (t, 0)); | |
2354 | else | |
2355 | sizeof_arg[i] = TREE_OPERAND (t, 0); | |
2356 | sizeof_arg_loc[i] = EXPR_LOCATION (t); | |
2357 | } | |
0d23cf7a | 2358 | sizeof_pointer_memaccess_warning |
3a785c97 | 2359 | (sizeof_arg_loc, fn, *args, |
0d23cf7a JJ |
2360 | sizeof_arg, same_type_ignoring_top_level_qualifiers_p); |
2361 | } | |
2362 | ||
2363 | /* A call to a namespace-scope function. */ | |
2364 | result = build_new_function_call (fn, args, koenig_p, complain); | |
2365 | } | |
16c35a1f | 2366 | } |
a723baf1 MM |
2367 | else if (TREE_CODE (fn) == PSEUDO_DTOR_EXPR) |
2368 | { | |
9771b263 | 2369 | if (!vec_safe_is_empty (*args)) |
a723baf1 MM |
2370 | error ("arguments to destructor are not allowed"); |
2371 | /* Mark the pseudo-destructor call as having side-effects so | |
2372 | that we do not issue warnings about its use. */ | |
2373 | result = build1 (NOP_EXPR, | |
2374 | void_type_node, | |
2375 | TREE_OPERAND (fn, 0)); | |
2376 | TREE_SIDE_EFFECTS (result) = 1; | |
a723baf1 | 2377 | } |
4ba126e4 | 2378 | else if (CLASS_TYPE_P (TREE_TYPE (fn))) |
d17811fd MM |
2379 | /* If the "function" is really an object of class type, it might |
2380 | have an overloaded `operator ()'. */ | |
c166b898 | 2381 | result = build_op_call (fn, args, complain); |
16c35a1f | 2382 | |
d17811fd MM |
2383 | if (!result) |
2384 | /* A call where the function is unknown. */ | |
c166b898 | 2385 | result = cp_build_function_call_vec (fn, args, complain); |
4ba126e4 | 2386 | |
bb4586d3 | 2387 | if (processing_template_decl && result != error_mark_node) |
6d80c4b9 | 2388 | { |
591cb3cf | 2389 | if (INDIRECT_REF_P (result)) |
bb4586d3 | 2390 | result = TREE_OPERAND (result, 0); |
c166b898 | 2391 | result = build_call_vec (TREE_TYPE (result), orig_fn, orig_args); |
6e04dcd5 | 2392 | SET_EXPR_LOCATION (result, input_location); |
5094a795 | 2393 | KOENIG_LOOKUP_P (result) = koenig_p; |
c166b898 | 2394 | release_tree_vector (orig_args); |
bb4586d3 | 2395 | result = convert_from_reference (result); |
6d80c4b9 | 2396 | } |
c166b898 | 2397 | |
3a2cb4d0 JM |
2398 | if (koenig_p) |
2399 | { | |
2400 | /* Free garbage OVERLOADs from arg-dependent lookup. */ | |
2401 | tree next = NULL_TREE; | |
2402 | for (fn = orig_fn; | |
2403 | fn && TREE_CODE (fn) == OVERLOAD && OVL_ARG_DEPENDENT (fn); | |
2404 | fn = next) | |
2405 | { | |
2406 | if (processing_template_decl) | |
2407 | /* In a template, we'll re-use them at instantiation time. */ | |
2408 | OVL_ARG_DEPENDENT (fn) = false; | |
2409 | else | |
2410 | { | |
2411 | next = OVL_CHAIN (fn); | |
2412 | ggc_free (fn); | |
2413 | } | |
2414 | } | |
2415 | } | |
2416 | ||
d17811fd | 2417 | return result; |
b4c4a9ec MM |
2418 | } |
2419 | ||
4a4f287d BO |
2420 | /* Instantiate a variable declaration from a TEMPLATE_ID_EXPR for use. */ |
2421 | ||
2422 | tree | |
2423 | finish_template_variable (tree var) | |
2424 | { | |
2425 | return instantiate_template (TREE_OPERAND (var, 0), TREE_OPERAND (var, 1), | |
2426 | tf_error); | |
2427 | } | |
2428 | ||
b4c4a9ec MM |
2429 | /* Finish a call to a postfix increment or decrement or EXPR. (Which |
2430 | is indicated by CODE, which should be POSTINCREMENT_EXPR or | |
2431 | POSTDECREMENT_EXPR.) */ | |
2432 | ||
c8094d83 | 2433 | tree |
3a978d72 | 2434 | finish_increment_expr (tree expr, enum tree_code code) |
b4c4a9ec | 2435 | { |
4fe977f2 | 2436 | return build_x_unary_op (input_location, code, expr, tf_warning_or_error); |
b4c4a9ec MM |
2437 | } |
2438 | ||
2439 | /* Finish a use of `this'. Returns an expression for `this'. */ | |
2440 | ||
c8094d83 | 2441 | tree |
3a978d72 | 2442 | finish_this_expr (void) |
b4c4a9ec MM |
2443 | { |
2444 | tree result; | |
2445 | ||
c6be04ad JM |
2446 | if (current_class_ptr) |
2447 | { | |
2448 | tree type = TREE_TYPE (current_class_ref); | |
2449 | ||
2450 | /* In a lambda expression, 'this' refers to the captured 'this'. */ | |
2451 | if (LAMBDA_TYPE_P (type)) | |
0b360a07 | 2452 | result = lambda_expr_this_capture (CLASSTYPE_LAMBDA_EXPR (type), true); |
c6be04ad JM |
2453 | else |
2454 | result = current_class_ptr; | |
c6be04ad | 2455 | } |
b4c4a9ec MM |
2456 | else if (current_function_decl |
2457 | && DECL_STATIC_FUNCTION_P (current_function_decl)) | |
2458 | { | |
9e637a26 | 2459 | error ("%<this%> is unavailable for static member functions"); |
b4c4a9ec MM |
2460 | result = error_mark_node; |
2461 | } | |
2462 | else | |
2463 | { | |
2464 | if (current_function_decl) | |
9e637a26 | 2465 | error ("invalid use of %<this%> in non-member function"); |
b4c4a9ec | 2466 | else |
9e637a26 | 2467 | error ("invalid use of %<this%> at top level"); |
b4c4a9ec MM |
2468 | result = error_mark_node; |
2469 | } | |
2470 | ||
374b2837 JM |
2471 | /* The keyword 'this' is a prvalue expression. */ |
2472 | result = rvalue (result); | |
2473 | ||
b4c4a9ec MM |
2474 | return result; |
2475 | } | |
2476 | ||
a723baf1 MM |
2477 | /* Finish a pseudo-destructor expression. If SCOPE is NULL, the |
2478 | expression was of the form `OBJECT.~DESTRUCTOR' where DESTRUCTOR is | |
2479 | the TYPE for the type given. If SCOPE is non-NULL, the expression | |
2480 | was of the form `OBJECT.SCOPE::~DESTRUCTOR'. */ | |
b4c4a9ec | 2481 | |
c8094d83 | 2482 | tree |
2dc6ed87 PC |
2483 | finish_pseudo_destructor_expr (tree object, tree scope, tree destructor, |
2484 | location_t loc) | |
b4c4a9ec | 2485 | { |
09b1ccd6 | 2486 | if (object == error_mark_node || destructor == error_mark_node) |
a723baf1 | 2487 | return error_mark_node; |
40242ccf | 2488 | |
50bc768d | 2489 | gcc_assert (TYPE_P (destructor)); |
b4c4a9ec | 2490 | |
a723baf1 MM |
2491 | if (!processing_template_decl) |
2492 | { | |
2493 | if (scope == error_mark_node) | |
2494 | { | |
2dc6ed87 | 2495 | error_at (loc, "invalid qualifying scope in pseudo-destructor name"); |
a723baf1 MM |
2496 | return error_mark_node; |
2497 | } | |
3df70c62 JM |
2498 | if (is_auto (destructor)) |
2499 | destructor = TREE_TYPE (object); | |
5cf10afb AP |
2500 | if (scope && TYPE_P (scope) && !check_dtor_name (scope, destructor)) |
2501 | { | |
2dc6ed87 PC |
2502 | error_at (loc, |
2503 | "qualified type %qT does not match destructor name ~%qT", | |
2504 | scope, destructor); | |
5cf10afb AP |
2505 | return error_mark_node; |
2506 | } | |
2507 | ||
c8094d83 | 2508 | |
26bcf8fc MM |
2509 | /* [expr.pseudo] says both: |
2510 | ||
0cbd7506 | 2511 | The type designated by the pseudo-destructor-name shall be |
26bcf8fc MM |
2512 | the same as the object type. |
2513 | ||
0cbd7506 | 2514 | and: |
26bcf8fc | 2515 | |
0cbd7506 | 2516 | The cv-unqualified versions of the object type and of the |
26bcf8fc MM |
2517 | type designated by the pseudo-destructor-name shall be the |
2518 | same type. | |
2519 | ||
0cbd7506 MS |
2520 | We implement the more generous second sentence, since that is |
2521 | what most other compilers do. */ | |
c8094d83 | 2522 | if (!same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (object), |
26bcf8fc | 2523 | destructor)) |
a723baf1 | 2524 | { |
2dc6ed87 | 2525 | error_at (loc, "%qE is not of type %qT", object, destructor); |
a723baf1 MM |
2526 | return error_mark_node; |
2527 | } | |
2528 | } | |
b4c4a9ec | 2529 | |
2dc6ed87 PC |
2530 | return build3_loc (loc, PSEUDO_DTOR_EXPR, void_type_node, object, |
2531 | scope, destructor); | |
b4c4a9ec MM |
2532 | } |
2533 | ||
ce4a0391 MM |
2534 | /* Finish an expression of the form CODE EXPR. */ |
2535 | ||
2536 | tree | |
e59baf05 JM |
2537 | finish_unary_op_expr (location_t loc, enum tree_code code, tree expr, |
2538 | tsubst_flags_t complain) | |
ce4a0391 | 2539 | { |
e59baf05 JM |
2540 | tree result = build_x_unary_op (loc, code, expr, complain); |
2541 | if ((complain & tf_warning) | |
2542 | && TREE_OVERFLOW_P (result) && !TREE_OVERFLOW_P (expr)) | |
c2255bc4 | 2543 | overflow_warning (input_location, result); |
59c0753d | 2544 | |
ce4a0391 MM |
2545 | return result; |
2546 | } | |
2547 | ||
a723baf1 | 2548 | /* Finish a compound-literal expression. TYPE is the type to which |
09357846 | 2549 | the CONSTRUCTOR in COMPOUND_LITERAL is being cast. */ |
a723baf1 MM |
2550 | |
2551 | tree | |
834aa426 JM |
2552 | finish_compound_literal (tree type, tree compound_literal, |
2553 | tsubst_flags_t complain) | |
a723baf1 | 2554 | { |
326a4d4e JJ |
2555 | if (type == error_mark_node) |
2556 | return error_mark_node; | |
2557 | ||
76186d20 JM |
2558 | if (TREE_CODE (type) == REFERENCE_TYPE) |
2559 | { | |
2560 | compound_literal | |
2561 | = finish_compound_literal (TREE_TYPE (type), compound_literal, | |
2562 | complain); | |
2563 | return cp_build_c_cast (type, compound_literal, complain); | |
2564 | } | |
2565 | ||
2b643eda MM |
2566 | if (!TYPE_OBJ_P (type)) |
2567 | { | |
834aa426 JM |
2568 | if (complain & tf_error) |
2569 | error ("compound literal of non-object type %qT", type); | |
2b643eda MM |
2570 | return error_mark_node; |
2571 | } | |
2572 | ||
a723baf1 | 2573 | if (processing_template_decl) |
a723baf1 | 2574 | { |
e92fb501 MM |
2575 | TREE_TYPE (compound_literal) = type; |
2576 | /* Mark the expression as a compound literal. */ | |
2577 | TREE_HAS_CONSTRUCTOR (compound_literal) = 1; | |
2578 | return compound_literal; | |
a723baf1 MM |
2579 | } |
2580 | ||
df794884 | 2581 | type = complete_type (type); |
09357846 JM |
2582 | |
2583 | if (TYPE_NON_AGGREGATE_CLASS (type)) | |
2584 | { | |
2585 | /* Trying to deal with a CONSTRUCTOR instead of a TREE_LIST | |
2586 | everywhere that deals with function arguments would be a pain, so | |
2587 | just wrap it in a TREE_LIST. The parser set a flag so we know | |
2588 | that it came from T{} rather than T({}). */ | |
2589 | CONSTRUCTOR_IS_DIRECT_INIT (compound_literal) = 1; | |
2590 | compound_literal = build_tree_list (NULL_TREE, compound_literal); | |
834aa426 | 2591 | return build_functional_cast (type, compound_literal, complain); |
09357846 JM |
2592 | } |
2593 | ||
23bee8f4 JJ |
2594 | if (TREE_CODE (type) == ARRAY_TYPE |
2595 | && check_array_initializer (NULL_TREE, type, compound_literal)) | |
2596 | return error_mark_node; | |
754af126 | 2597 | compound_literal = reshape_init (type, compound_literal, complain); |
25339f10 | 2598 | if (SCALAR_TYPE_P (type) |
c428869b | 2599 | && !BRACE_ENCLOSED_INITIALIZER_P (compound_literal) |
6a6bdc3d PC |
2600 | && !check_narrowing (type, compound_literal, complain)) |
2601 | return error_mark_node; | |
80c6dcf5 JM |
2602 | if (TREE_CODE (type) == ARRAY_TYPE |
2603 | && TYPE_DOMAIN (type) == NULL_TREE) | |
2604 | { | |
2605 | cp_complete_array_type_or_error (&type, compound_literal, | |
2606 | false, complain); | |
2607 | if (type == error_mark_node) | |
2608 | return error_mark_node; | |
2609 | } | |
754af126 | 2610 | compound_literal = digest_init (type, compound_literal, complain); |
8c53f5e2 JM |
2611 | if (TREE_CODE (compound_literal) == CONSTRUCTOR) |
2612 | TREE_HAS_CONSTRUCTOR (compound_literal) = true; | |
a63940ba JM |
2613 | /* Put static/constant array temporaries in static variables, but always |
2614 | represent class temporaries with TARGET_EXPR so we elide copies. */ | |
2615 | if ((!at_function_scope_p () || CP_TYPE_CONST_P (type)) | |
2616 | && TREE_CODE (type) == ARRAY_TYPE | |
fa9ef321 | 2617 | && !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type) |
a63940ba JM |
2618 | && initializer_constant_valid_p (compound_literal, type)) |
2619 | { | |
2620 | tree decl = create_temporary_var (type); | |
2621 | DECL_INITIAL (decl) = compound_literal; | |
2622 | TREE_STATIC (decl) = 1; | |
2623 | if (literal_type_p (type) && CP_TYPE_CONST_NON_VOLATILE_P (type)) | |
2624 | { | |
2625 | /* 5.19 says that a constant expression can include an | |
2626 | lvalue-rvalue conversion applied to "a glvalue of literal type | |
2627 | that refers to a non-volatile temporary object initialized | |
2628 | with a constant expression". Rather than try to communicate | |
2629 | that this VAR_DECL is a temporary, just mark it constexpr. */ | |
2630 | DECL_DECLARED_CONSTEXPR_P (decl) = true; | |
2631 | DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = true; | |
2632 | TREE_CONSTANT (decl) = true; | |
2633 | } | |
2634 | cp_apply_type_quals_to_decl (cp_type_quals (type), decl); | |
2635 | decl = pushdecl_top_level (decl); | |
2636 | DECL_NAME (decl) = make_anon_name (); | |
2637 | SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl)); | |
eca7fc57 JM |
2638 | /* Make sure the destructor is callable. */ |
2639 | tree clean = cxx_maybe_build_cleanup (decl, complain); | |
2640 | if (clean == error_mark_node) | |
2641 | return error_mark_node; | |
a63940ba JM |
2642 | return decl; |
2643 | } | |
2644 | else | |
574cfaa4 | 2645 | return get_target_expr_sfinae (compound_literal, complain); |
a723baf1 MM |
2646 | } |
2647 | ||
5f261ba9 MM |
2648 | /* Return the declaration for the function-name variable indicated by |
2649 | ID. */ | |
2650 | ||
2651 | tree | |
2652 | finish_fname (tree id) | |
2653 | { | |
2654 | tree decl; | |
c8094d83 | 2655 | |
3ba09659 | 2656 | decl = fname_decl (input_location, C_RID_CODE (id), id); |
f2381074 KT |
2657 | if (processing_template_decl && current_function_decl |
2658 | && decl != error_mark_node) | |
10b1d5e7 | 2659 | decl = DECL_NAME (decl); |
5f261ba9 MM |
2660 | return decl; |
2661 | } | |
2662 | ||
8014a339 | 2663 | /* Finish a translation unit. */ |
ce4a0391 | 2664 | |
c8094d83 | 2665 | void |
3a978d72 | 2666 | finish_translation_unit (void) |
ce4a0391 MM |
2667 | { |
2668 | /* In case there were missing closebraces, | |
2669 | get us back to the global binding level. */ | |
273a708f | 2670 | pop_everything (); |
ce4a0391 MM |
2671 | while (current_namespace != global_namespace) |
2672 | pop_namespace (); | |
0ba8a114 | 2673 | |
c6002625 | 2674 | /* Do file scope __FUNCTION__ et al. */ |
0ba8a114 | 2675 | finish_fname_decls (); |
ce4a0391 MM |
2676 | } |
2677 | ||
b4c4a9ec MM |
2678 | /* Finish a template type parameter, specified as AGGR IDENTIFIER. |
2679 | Returns the parameter. */ | |
2680 | ||
c8094d83 | 2681 | tree |
3a978d72 | 2682 | finish_template_type_parm (tree aggr, tree identifier) |
b4c4a9ec | 2683 | { |
6eabb241 | 2684 | if (aggr != class_type_node) |
b4c4a9ec | 2685 | { |
cbe5f3b3 | 2686 | permerror (input_location, "template type parameters must use the keyword %<class%> or %<typename%>"); |
b4c4a9ec MM |
2687 | aggr = class_type_node; |
2688 | } | |
2689 | ||
2690 | return build_tree_list (aggr, identifier); | |
2691 | } | |
2692 | ||
2693 | /* Finish a template template parameter, specified as AGGR IDENTIFIER. | |
2694 | Returns the parameter. */ | |
2695 | ||
c8094d83 | 2696 | tree |
3a978d72 | 2697 | finish_template_template_parm (tree aggr, tree identifier) |
b4c4a9ec | 2698 | { |
c2255bc4 AH |
2699 | tree decl = build_decl (input_location, |
2700 | TYPE_DECL, identifier, NULL_TREE); | |
b4c4a9ec MM |
2701 | tree tmpl = build_lang_decl (TEMPLATE_DECL, identifier, NULL_TREE); |
2702 | DECL_TEMPLATE_PARMS (tmpl) = current_template_parms; | |
2703 | DECL_TEMPLATE_RESULT (tmpl) = decl; | |
c727aa5e | 2704 | DECL_ARTIFICIAL (decl) = 1; |
b4c4a9ec MM |
2705 | end_template_decl (); |
2706 | ||
50bc768d | 2707 | gcc_assert (DECL_TEMPLATE_PARMS (tmpl)); |
b37bf5bd | 2708 | |
85d85234 DG |
2709 | check_default_tmpl_args (decl, DECL_TEMPLATE_PARMS (tmpl), |
2710 | /*is_primary=*/true, /*is_partial=*/false, | |
2711 | /*is_friend=*/0); | |
2712 | ||
b4c4a9ec MM |
2713 | return finish_template_type_parm (aggr, tmpl); |
2714 | } | |
ce4a0391 | 2715 | |
8ba658ee MM |
2716 | /* ARGUMENT is the default-argument value for a template template |
2717 | parameter. If ARGUMENT is invalid, issue error messages and return | |
2718 | the ERROR_MARK_NODE. Otherwise, ARGUMENT itself is returned. */ | |
2719 | ||
2720 | tree | |
2721 | check_template_template_default_arg (tree argument) | |
2722 | { | |
2723 | if (TREE_CODE (argument) != TEMPLATE_DECL | |
2724 | && TREE_CODE (argument) != TEMPLATE_TEMPLATE_PARM | |
8ba658ee MM |
2725 | && TREE_CODE (argument) != UNBOUND_CLASS_TEMPLATE) |
2726 | { | |
a3a503a5 | 2727 | if (TREE_CODE (argument) == TYPE_DECL) |
e488a090 VR |
2728 | error ("invalid use of type %qT as a default value for a template " |
2729 | "template-parameter", TREE_TYPE (argument)); | |
a3a503a5 GB |
2730 | else |
2731 | error ("invalid default argument for a template template parameter"); | |
8ba658ee MM |
2732 | return error_mark_node; |
2733 | } | |
2734 | ||
2735 | return argument; | |
2736 | } | |
2737 | ||
ce4a0391 MM |
2738 | /* Begin a class definition, as indicated by T. */ |
2739 | ||
2740 | tree | |
e3c888eb | 2741 | begin_class_definition (tree t) |
ce4a0391 | 2742 | { |
7d2f0ecd | 2743 | if (error_operand_p (t) || error_operand_p (TYPE_MAIN_DECL (t))) |
7437519c ZW |
2744 | return error_mark_node; |
2745 | ||
522d6614 NS |
2746 | if (processing_template_parmlist) |
2747 | { | |
a82e1a7d | 2748 | error ("definition of %q#T inside template parameter list", t); |
522d6614 NS |
2749 | return error_mark_node; |
2750 | } | |
ebf0bf7f JJ |
2751 | |
2752 | /* According to the C++ ABI, decimal classes defined in ISO/IEC TR 24733 | |
2753 | are passed the same as decimal scalar types. */ | |
cd924144 JM |
2754 | if (TREE_CODE (t) == RECORD_TYPE |
2755 | && !processing_template_decl) | |
ebf0bf7f | 2756 | { |
cd924144 JM |
2757 | tree ns = TYPE_CONTEXT (t); |
2758 | if (ns && TREE_CODE (ns) == NAMESPACE_DECL | |
2759 | && DECL_CONTEXT (ns) == std_node | |
935c0a5d | 2760 | && DECL_NAME (ns) |
cd924144 JM |
2761 | && !strcmp (IDENTIFIER_POINTER (DECL_NAME (ns)), "decimal")) |
2762 | { | |
2763 | const char *n = TYPE_NAME_STRING (t); | |
2764 | if ((strcmp (n, "decimal32") == 0) | |
2765 | || (strcmp (n, "decimal64") == 0) | |
2766 | || (strcmp (n, "decimal128") == 0)) | |
2767 | TYPE_TRANSPARENT_AGGR (t) = 1; | |
2768 | } | |
ebf0bf7f JJ |
2769 | } |
2770 | ||
47ee8904 MM |
2771 | /* A non-implicit typename comes from code like: |
2772 | ||
2773 | template <typename T> struct A { | |
0cbd7506 | 2774 | template <typename U> struct A<T>::B ... |
47ee8904 MM |
2775 | |
2776 | This is erroneous. */ | |
2777 | else if (TREE_CODE (t) == TYPENAME_TYPE) | |
2778 | { | |
a82e1a7d | 2779 | error ("invalid definition of qualified type %qT", t); |
47ee8904 MM |
2780 | t = error_mark_node; |
2781 | } | |
2782 | ||
9e1e64ec | 2783 | if (t == error_mark_node || ! MAYBE_CLASS_TYPE_P (t)) |
ce4a0391 | 2784 | { |
9e1e64ec | 2785 | t = make_class_type (RECORD_TYPE); |
bd3d082e | 2786 | pushtag (make_anon_name (), t, /*tag_scope=*/ts_current); |
ce4a0391 | 2787 | } |
830fcda8 | 2788 | |
4c571114 | 2789 | if (TYPE_BEING_DEFINED (t)) |
ce4a0391 | 2790 | { |
9e1e64ec | 2791 | t = make_class_type (TREE_CODE (t)); |
bd3d082e | 2792 | pushtag (TYPE_IDENTIFIER (t), t, /*tag_scope=*/ts_current); |
ce4a0391 | 2793 | } |
ff350acd | 2794 | maybe_process_partial_specialization (t); |
29370796 | 2795 | pushclass (t); |
ce4a0391 | 2796 | TYPE_BEING_DEFINED (t) = 1; |
5294e4c3 | 2797 | class_binding_level->defining_class_p = 1; |
b9e75696 | 2798 | |
c0694c4b MM |
2799 | if (flag_pack_struct) |
2800 | { | |
2801 | tree v; | |
2802 | TYPE_PACKED (t) = 1; | |
2803 | /* Even though the type is being defined for the first time | |
2804 | here, there might have been a forward declaration, so there | |
2805 | might be cv-qualified variants of T. */ | |
2806 | for (v = TYPE_NEXT_VARIANT (t); v; v = TYPE_NEXT_VARIANT (v)) | |
2807 | TYPE_PACKED (v) = 1; | |
2808 | } | |
ce4a0391 MM |
2809 | /* Reset the interface data, at the earliest possible |
2810 | moment, as it might have been set via a class foo; | |
2811 | before. */ | |
1951a1b6 JM |
2812 | if (! TYPE_ANONYMOUS_P (t)) |
2813 | { | |
8400e75e DM |
2814 | struct c_fileinfo *finfo = \ |
2815 | get_fileinfo (LOCATION_FILE (input_location)); | |
5d709b00 | 2816 | CLASSTYPE_INTERFACE_ONLY (t) = finfo->interface_only; |
1951a1b6 | 2817 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X |
5d709b00 | 2818 | (t, finfo->interface_unknown); |
1951a1b6 | 2819 | } |
ce4a0391 | 2820 | reset_specialization(); |
c8094d83 | 2821 | |
b7975aed MM |
2822 | /* Make a declaration for this class in its own scope. */ |
2823 | build_self_reference (); | |
2824 | ||
830fcda8 | 2825 | return t; |
ce4a0391 MM |
2826 | } |
2827 | ||
61a127b3 MM |
2828 | /* Finish the member declaration given by DECL. */ |
2829 | ||
2830 | void | |
3a978d72 | 2831 | finish_member_declaration (tree decl) |
61a127b3 MM |
2832 | { |
2833 | if (decl == error_mark_node || decl == NULL_TREE) | |
2834 | return; | |
2835 | ||
2836 | if (decl == void_type_node) | |
2837 | /* The COMPONENT was a friend, not a member, and so there's | |
2838 | nothing for us to do. */ | |
2839 | return; | |
2840 | ||
2841 | /* We should see only one DECL at a time. */ | |
910ad8de | 2842 | gcc_assert (DECL_CHAIN (decl) == NULL_TREE); |
61a127b3 MM |
2843 | |
2844 | /* Set up access control for DECL. */ | |
c8094d83 | 2845 | TREE_PRIVATE (decl) |
61a127b3 | 2846 | = (current_access_specifier == access_private_node); |
c8094d83 | 2847 | TREE_PROTECTED (decl) |
61a127b3 MM |
2848 | = (current_access_specifier == access_protected_node); |
2849 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
2850 | { | |
17aec3eb RK |
2851 | TREE_PRIVATE (DECL_TEMPLATE_RESULT (decl)) = TREE_PRIVATE (decl); |
2852 | TREE_PROTECTED (DECL_TEMPLATE_RESULT (decl)) = TREE_PROTECTED (decl); | |
61a127b3 MM |
2853 | } |
2854 | ||
8d0d1915 JM |
2855 | /* Mark the DECL as a member of the current class, unless it's |
2856 | a member of an enumeration. */ | |
2857 | if (TREE_CODE (decl) != CONST_DECL) | |
2858 | DECL_CONTEXT (decl) = current_class_type; | |
61a127b3 | 2859 | |
b1d7b1c0 | 2860 | /* Check for bare parameter packs in the member variable declaration. */ |
1ad8aeeb | 2861 | if (TREE_CODE (decl) == FIELD_DECL) |
4439d02f | 2862 | { |
7b3e2d46 | 2863 | if (check_for_bare_parameter_packs (TREE_TYPE (decl))) |
4439d02f | 2864 | TREE_TYPE (decl) = error_mark_node; |
7b3e2d46 | 2865 | if (check_for_bare_parameter_packs (DECL_ATTRIBUTES (decl))) |
4439d02f DG |
2866 | DECL_ATTRIBUTES (decl) = NULL_TREE; |
2867 | } | |
b1d7b1c0 | 2868 | |
421844e7 MM |
2869 | /* [dcl.link] |
2870 | ||
2871 | A C language linkage is ignored for the names of class members | |
2872 | and the member function type of class member functions. */ | |
2873 | if (DECL_LANG_SPECIFIC (decl) && DECL_LANGUAGE (decl) == lang_c) | |
5d2ed28c | 2874 | SET_DECL_LANGUAGE (decl, lang_cplusplus); |
421844e7 | 2875 | |
61a127b3 MM |
2876 | /* Put functions on the TYPE_METHODS list and everything else on the |
2877 | TYPE_FIELDS list. Note that these are built up in reverse order. | |
2878 | We reverse them (to obtain declaration order) in finish_struct. */ | |
9ededfc5 | 2879 | if (DECL_DECLARES_FUNCTION_P (decl)) |
61a127b3 MM |
2880 | { |
2881 | /* We also need to add this function to the | |
2882 | CLASSTYPE_METHOD_VEC. */ | |
b77fe7b4 NS |
2883 | if (add_method (current_class_type, decl, NULL_TREE)) |
2884 | { | |
910ad8de | 2885 | DECL_CHAIN (decl) = TYPE_METHODS (current_class_type); |
b77fe7b4 | 2886 | TYPE_METHODS (current_class_type) = decl; |
f139561c | 2887 | |
b77fe7b4 NS |
2888 | maybe_add_class_template_decl_list (current_class_type, decl, |
2889 | /*friend_p=*/0); | |
2890 | } | |
61a127b3 | 2891 | } |
fad882c6 JM |
2892 | /* Enter the DECL into the scope of the class, if the class |
2893 | isn't a closure (whose fields are supposed to be unnamed). */ | |
2894 | else if (CLASSTYPE_LAMBDA_EXPR (current_class_type) | |
2895 | || pushdecl_class_level (decl)) | |
61a127b3 | 2896 | { |
557831a9 FC |
2897 | if (TREE_CODE (decl) == USING_DECL) |
2898 | { | |
557831a9 FC |
2899 | /* For now, ignore class-scope USING_DECLS, so that |
2900 | debugging backends do not see them. */ | |
2901 | DECL_IGNORED_P (decl) = 1; | |
2902 | } | |
2903 | ||
61a127b3 MM |
2904 | /* All TYPE_DECLs go at the end of TYPE_FIELDS. Ordinary fields |
2905 | go at the beginning. The reason is that lookup_field_1 | |
2906 | searches the list in order, and we want a field name to | |
2907 | override a type name so that the "struct stat hack" will | |
2908 | work. In particular: | |
2909 | ||
2910 | struct S { enum E { }; int E } s; | |
2911 | s.E = 3; | |
2912 | ||
0e339752 | 2913 | is valid. In addition, the FIELD_DECLs must be maintained in |
61a127b3 MM |
2914 | declaration order so that class layout works as expected. |
2915 | However, we don't need that order until class layout, so we | |
2916 | save a little time by putting FIELD_DECLs on in reverse order | |
2917 | here, and then reversing them in finish_struct_1. (We could | |
2918 | also keep a pointer to the correct insertion points in the | |
2919 | list.) */ | |
2920 | ||
2921 | if (TREE_CODE (decl) == TYPE_DECL) | |
c8094d83 | 2922 | TYPE_FIELDS (current_class_type) |
61a127b3 MM |
2923 | = chainon (TYPE_FIELDS (current_class_type), decl); |
2924 | else | |
2925 | { | |
910ad8de | 2926 | DECL_CHAIN (decl) = TYPE_FIELDS (current_class_type); |
61a127b3 MM |
2927 | TYPE_FIELDS (current_class_type) = decl; |
2928 | } | |
8f032717 | 2929 | |
c8094d83 | 2930 | maybe_add_class_template_decl_list (current_class_type, decl, |
f139561c | 2931 | /*friend_p=*/0); |
61a127b3 | 2932 | } |
5e2f4cd2 MM |
2933 | |
2934 | if (pch_file) | |
2935 | note_decl_for_pch (decl); | |
2936 | } | |
2937 | ||
2938 | /* DECL has been declared while we are building a PCH file. Perform | |
2939 | actions that we might normally undertake lazily, but which can be | |
2940 | performed now so that they do not have to be performed in | |
2941 | translation units which include the PCH file. */ | |
2942 | ||
2943 | void | |
2944 | note_decl_for_pch (tree decl) | |
2945 | { | |
2946 | gcc_assert (pch_file); | |
2947 | ||
5e2f4cd2 MM |
2948 | /* There's a good chance that we'll have to mangle names at some |
2949 | point, even if only for emission in debugging information. */ | |
cb6da767 | 2950 | if (VAR_OR_FUNCTION_DECL_P (decl) |
ec0897de | 2951 | && !processing_template_decl) |
5e2f4cd2 | 2952 | mangle_decl (decl); |
61a127b3 MM |
2953 | } |
2954 | ||
306ef644 | 2955 | /* Finish processing a complete template declaration. The PARMS are |
36a117a5 MM |
2956 | the template parameters. */ |
2957 | ||
2958 | void | |
3a978d72 | 2959 | finish_template_decl (tree parms) |
36a117a5 MM |
2960 | { |
2961 | if (parms) | |
2962 | end_template_decl (); | |
2963 | else | |
2964 | end_specialization (); | |
2965 | } | |
2966 | ||
509fc277 | 2967 | /* Finish processing a template-id (which names a type) of the form |
36a117a5 | 2968 | NAME < ARGS >. Return the TYPE_DECL for the type named by the |
838dfd8a | 2969 | template-id. If ENTERING_SCOPE is nonzero we are about to enter |
36a117a5 MM |
2970 | the scope of template-id indicated. */ |
2971 | ||
2972 | tree | |
3a978d72 | 2973 | finish_template_type (tree name, tree args, int entering_scope) |
36a117a5 | 2974 | { |
28704289 | 2975 | tree type; |
36a117a5 | 2976 | |
28704289 | 2977 | type = lookup_template_class (name, args, |
42eaed49 | 2978 | NULL_TREE, NULL_TREE, entering_scope, |
23fca1f5 | 2979 | tf_warning_or_error | tf_user); |
28704289 DS |
2980 | if (type == error_mark_node) |
2981 | return type; | |
2982 | else if (CLASS_TYPE_P (type) && !alias_type_or_template_p (type)) | |
2983 | return TYPE_STUB_DECL (type); | |
2984 | else | |
2985 | return TYPE_NAME (type); | |
36a117a5 | 2986 | } |
648f19f6 | 2987 | |
ea6021e8 MM |
2988 | /* Finish processing a BASE_CLASS with the indicated ACCESS_SPECIFIER. |
2989 | Return a TREE_LIST containing the ACCESS_SPECIFIER and the | |
2990 | BASE_CLASS, or NULL_TREE if an error occurred. The | |
aba649ba | 2991 | ACCESS_SPECIFIER is one of |
809e3e7f NS |
2992 | access_{default,public,protected_private}_node. For a virtual base |
2993 | we set TREE_TYPE. */ | |
ea6021e8 | 2994 | |
c8094d83 | 2995 | tree |
dbbf88d1 | 2996 | finish_base_specifier (tree base, tree access, bool virtual_p) |
ea6021e8 | 2997 | { |
ea6021e8 MM |
2998 | tree result; |
2999 | ||
dbbf88d1 | 3000 | if (base == error_mark_node) |
acb044ee GDR |
3001 | { |
3002 | error ("invalid base-class specification"); | |
3003 | result = NULL_TREE; | |
3004 | } | |
9e1e64ec PC |
3005 | else if (! MAYBE_CLASS_TYPE_P (base)) |
3006 | { | |
3007 | error ("%qT is not a class type", base); | |
3008 | result = NULL_TREE; | |
3009 | } | |
ea6021e8 | 3010 | else |
bb92901d | 3011 | { |
dbbf88d1 | 3012 | if (cp_type_quals (base) != 0) |
0cbd7506 | 3013 | { |
546a4197 PC |
3014 | /* DR 484: Can a base-specifier name a cv-qualified |
3015 | class type? */ | |
0cbd7506 MS |
3016 | base = TYPE_MAIN_VARIANT (base); |
3017 | } | |
dbbf88d1 | 3018 | result = build_tree_list (access, base); |
809e3e7f NS |
3019 | if (virtual_p) |
3020 | TREE_TYPE (result) = integer_type_node; | |
bb92901d | 3021 | } |
ea6021e8 MM |
3022 | |
3023 | return result; | |
3024 | } | |
61a127b3 | 3025 | |
eff3a276 MM |
3026 | /* If FNS is a member function, a set of member functions, or a |
3027 | template-id referring to one or more member functions, return a | |
3028 | BASELINK for FNS, incorporating the current access context. | |
3029 | Otherwise, return FNS unchanged. */ | |
3030 | ||
3031 | tree | |
3032 | baselink_for_fns (tree fns) | |
3033 | { | |
aef3a6b2 | 3034 | tree scope; |
eff3a276 MM |
3035 | tree cl; |
3036 | ||
3037 | if (BASELINK_P (fns) | |
eff3a276 MM |
3038 | || error_operand_p (fns)) |
3039 | return fns; | |
aef3a6b2 JM |
3040 | |
3041 | scope = ovl_scope (fns); | |
3042 | if (!CLASS_TYPE_P (scope)) | |
eff3a276 MM |
3043 | return fns; |
3044 | ||
aef3a6b2 | 3045 | cl = currently_open_derived_class (scope); |
eff3a276 | 3046 | if (!cl) |
aef3a6b2 | 3047 | cl = scope; |
eff3a276 | 3048 | cl = TYPE_BINFO (cl); |
5a40306b | 3049 | return build_baselink (cl, cl, fns, /*optype=*/NULL_TREE); |
eff3a276 MM |
3050 | } |
3051 | ||
9fd30fec | 3052 | /* Returns true iff DECL is a variable from a function outside |
d5f4eddd JM |
3053 | the current one. */ |
3054 | ||
3055 | static bool | |
9fd30fec | 3056 | outer_var_p (tree decl) |
d5f4eddd | 3057 | { |
5a6ccc94 | 3058 | return ((VAR_P (decl) || TREE_CODE (decl) == PARM_DECL) |
d5f4eddd | 3059 | && DECL_FUNCTION_SCOPE_P (decl) |
cdf47df0 JM |
3060 | && (DECL_CONTEXT (decl) != current_function_decl |
3061 | || parsing_nsdmi ())); | |
d5f4eddd JM |
3062 | } |
3063 | ||
9fd30fec JM |
3064 | /* As above, but also checks that DECL is automatic. */ |
3065 | ||
3066 | static bool | |
3067 | outer_automatic_var_p (tree decl) | |
3068 | { | |
3069 | return (outer_var_p (decl) | |
3070 | && !TREE_STATIC (decl)); | |
3071 | } | |
3072 | ||
b3445994 MM |
3073 | /* ID_EXPRESSION is a representation of parsed, but unprocessed, |
3074 | id-expression. (See cp_parser_id_expression for details.) SCOPE, | |
3075 | if non-NULL, is the type or namespace used to explicitly qualify | |
3076 | ID_EXPRESSION. DECL is the entity to which that name has been | |
c8094d83 | 3077 | resolved. |
b3445994 MM |
3078 | |
3079 | *CONSTANT_EXPRESSION_P is true if we are presently parsing a | |
3080 | constant-expression. In that case, *NON_CONSTANT_EXPRESSION_P will | |
3081 | be set to true if this expression isn't permitted in a | |
3082 | constant-expression, but it is otherwise not set by this function. | |
3083 | *ALLOW_NON_CONSTANT_EXPRESSION_P is true if we are parsing a | |
3084 | constant-expression, but a non-constant expression is also | |
3085 | permissible. | |
3086 | ||
02ed62dd MM |
3087 | DONE is true if this expression is a complete postfix-expression; |
3088 | it is false if this expression is followed by '->', '[', '(', etc. | |
3089 | ADDRESS_P is true iff this expression is the operand of '&'. | |
3090 | TEMPLATE_P is true iff the qualified-id was of the form | |
3091 | "A::template B". TEMPLATE_ARG_P is true iff this qualified name | |
3092 | appears as a template argument. | |
3093 | ||
b3445994 MM |
3094 | If an error occurs, and it is the kind of error that might cause |
3095 | the parser to abort a tentative parse, *ERROR_MSG is filled in. It | |
3096 | is the caller's responsibility to issue the message. *ERROR_MSG | |
3097 | will be a string with static storage duration, so the caller need | |
3098 | not "free" it. | |
3099 | ||
3100 | Return an expression for the entity, after issuing appropriate | |
3101 | diagnostics. This function is also responsible for transforming a | |
3102 | reference to a non-static member into a COMPONENT_REF that makes | |
c8094d83 | 3103 | the use of "this" explicit. |
b3445994 MM |
3104 | |
3105 | Upon return, *IDK will be filled in appropriately. */ | |
b3445994 | 3106 | tree |
c8094d83 | 3107 | finish_id_expression (tree id_expression, |
b3445994 MM |
3108 | tree decl, |
3109 | tree scope, | |
3110 | cp_id_kind *idk, | |
67c03833 JM |
3111 | bool integral_constant_expression_p, |
3112 | bool allow_non_integral_constant_expression_p, | |
3113 | bool *non_integral_constant_expression_p, | |
02ed62dd MM |
3114 | bool template_p, |
3115 | bool done, | |
3116 | bool address_p, | |
3117 | bool template_arg_p, | |
2b7a3abf DS |
3118 | const char **error_msg, |
3119 | location_t location) | |
b3445994 | 3120 | { |
a9727434 FC |
3121 | decl = strip_using_decl (decl); |
3122 | ||
b3445994 MM |
3123 | /* Initialize the output parameters. */ |
3124 | *idk = CP_ID_KIND_NONE; | |
3125 | *error_msg = NULL; | |
3126 | ||
3127 | if (id_expression == error_mark_node) | |
3128 | return error_mark_node; | |
3129 | /* If we have a template-id, then no further lookup is | |
3130 | required. If the template-id was for a template-class, we | |
3131 | will sometimes have a TYPE_DECL at this point. */ | |
3132 | else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
ee935db4 | 3133 | || TREE_CODE (decl) == TYPE_DECL) |
b3445994 MM |
3134 | ; |
3135 | /* Look up the name. */ | |
c8094d83 | 3136 | else |
b3445994 MM |
3137 | { |
3138 | if (decl == error_mark_node) | |
3139 | { | |
3140 | /* Name lookup failed. */ | |
c8094d83 MS |
3141 | if (scope |
3142 | && (!TYPE_P (scope) | |
4546865e | 3143 | || (!dependent_type_p (scope) |
9dc6f476 | 3144 | && !(identifier_p (id_expression) |
4546865e MM |
3145 | && IDENTIFIER_TYPENAME_P (id_expression) |
3146 | && dependent_type_p (TREE_TYPE (id_expression)))))) | |
b3445994 | 3147 | { |
4546865e MM |
3148 | /* If the qualifying type is non-dependent (and the name |
3149 | does not name a conversion operator to a dependent | |
3150 | type), issue an error. */ | |
2b7a3abf | 3151 | qualified_name_lookup_error (scope, id_expression, decl, location); |
b3445994 MM |
3152 | return error_mark_node; |
3153 | } | |
3154 | else if (!scope) | |
3155 | { | |
3156 | /* It may be resolved via Koenig lookup. */ | |
3157 | *idk = CP_ID_KIND_UNQUALIFIED; | |
3158 | return id_expression; | |
3159 | } | |
4546865e MM |
3160 | else |
3161 | decl = id_expression; | |
b3445994 MM |
3162 | } |
3163 | /* If DECL is a variable that would be out of scope under | |
3164 | ANSI/ISO rules, but in scope in the ARM, name lookup | |
3165 | will succeed. Issue a diagnostic here. */ | |
3166 | else | |
3167 | decl = check_for_out_of_scope_variable (decl); | |
3168 | ||
3169 | /* Remember that the name was used in the definition of | |
3170 | the current class so that we can check later to see if | |
3171 | the meaning would have been different after the class | |
3172 | was entirely defined. */ | |
9dc6f476 | 3173 | if (!scope && decl != error_mark_node && identifier_p (id_expression)) |
b3445994 | 3174 | maybe_note_name_used_in_class (id_expression, decl); |
8ca4bf25 | 3175 | |
d5f4eddd JM |
3176 | /* Disallow uses of local variables from containing functions, except |
3177 | within lambda-expressions. */ | |
ce901100 JM |
3178 | if (!outer_var_p (decl)) |
3179 | /* OK */; | |
3180 | else if (TREE_STATIC (decl) | |
3181 | /* It's not a use (3.2) if we're in an unevaluated context. */ | |
3182 | || cp_unevaluated_operand) | |
d1a902a2 | 3183 | /* OK */; |
9fd30fec | 3184 | else |
8ca4bf25 | 3185 | { |
d5f4eddd JM |
3186 | tree context = DECL_CONTEXT (decl); |
3187 | tree containing_function = current_function_decl; | |
3188 | tree lambda_stack = NULL_TREE; | |
3189 | tree lambda_expr = NULL_TREE; | |
f395f5e2 | 3190 | tree initializer = convert_from_reference (decl); |
d5f4eddd | 3191 | |
809fbdce JM |
3192 | /* Mark it as used now even if the use is ill-formed. */ |
3193 | mark_used (decl); | |
3194 | ||
d5f4eddd JM |
3195 | /* Core issue 696: "[At the July 2009 meeting] the CWG expressed |
3196 | support for an approach in which a reference to a local | |
3197 | [constant] automatic variable in a nested class or lambda body | |
3198 | would enter the expression as an rvalue, which would reduce | |
3199 | the complexity of the problem" | |
3200 | ||
3201 | FIXME update for final resolution of core issue 696. */ | |
d1a902a2 | 3202 | if (decl_maybe_constant_var_p (decl)) |
30fa2a51 JM |
3203 | { |
3204 | if (processing_template_decl) | |
3205 | /* In a template, the constant value may not be in a usable | |
d1a902a2 JM |
3206 | form, so wait until instantiation time. */ |
3207 | return decl; | |
3208 | else if (decl_constant_var_p (decl)) | |
30fa2a51 JM |
3209 | return integral_constant_value (decl); |
3210 | } | |
d5f4eddd | 3211 | |
cdf47df0 JM |
3212 | if (parsing_nsdmi ()) |
3213 | containing_function = NULL_TREE; | |
d5f4eddd JM |
3214 | /* If we are in a lambda function, we can move out until we hit |
3215 | 1. the context, | |
3216 | 2. a non-lambda function, or | |
3217 | 3. a non-default capturing lambda function. */ | |
cdf47df0 JM |
3218 | else while (context != containing_function |
3219 | && LAMBDA_FUNCTION_P (containing_function)) | |
d5f4eddd JM |
3220 | { |
3221 | lambda_expr = CLASSTYPE_LAMBDA_EXPR | |
3222 | (DECL_CONTEXT (containing_function)); | |
3223 | ||
3224 | if (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda_expr) | |
3225 | == CPLD_NONE) | |
3226 | break; | |
3227 | ||
3228 | lambda_stack = tree_cons (NULL_TREE, | |
3229 | lambda_expr, | |
3230 | lambda_stack); | |
3231 | ||
3232 | containing_function | |
3233 | = decl_function_context (containing_function); | |
3234 | } | |
3235 | ||
08afbd3b JM |
3236 | if (lambda_expr && TREE_CODE (decl) == VAR_DECL |
3237 | && DECL_ANON_UNION_VAR_P (decl)) | |
3238 | { | |
3239 | error ("cannot capture member %qD of anonymous union", decl); | |
3240 | return error_mark_node; | |
3241 | } | |
d5f4eddd JM |
3242 | if (context == containing_function) |
3243 | { | |
3244 | decl = add_default_capture (lambda_stack, | |
3245 | /*id=*/DECL_NAME (decl), | |
9660afe0 | 3246 | initializer); |
d5f4eddd JM |
3247 | } |
3248 | else if (lambda_expr) | |
3249 | { | |
3250 | error ("%qD is not captured", decl); | |
3251 | return error_mark_node; | |
3252 | } | |
3253 | else | |
8ca4bf25 | 3254 | { |
5a6ccc94 | 3255 | error (VAR_P (decl) |
e9e9638d | 3256 | ? G_("use of local variable with automatic storage from containing function") |
9b6ab3c0 | 3257 | : G_("use of parameter from containing function")); |
2e507b9a | 3258 | inform (input_location, "%q+#D declared here", decl); |
8ca4bf25 MM |
3259 | return error_mark_node; |
3260 | } | |
3261 | } | |
da9bc840 JM |
3262 | |
3263 | /* Also disallow uses of function parameters outside the function | |
3264 | body, except inside an unevaluated context (i.e. decltype). */ | |
3265 | if (TREE_CODE (decl) == PARM_DECL | |
3266 | && DECL_CONTEXT (decl) == NULL_TREE | |
3267 | && !cp_unevaluated_operand) | |
3268 | { | |
5d264d62 | 3269 | *error_msg = "use of parameter outside function body"; |
da9bc840 JM |
3270 | return error_mark_node; |
3271 | } | |
b3445994 MM |
3272 | } |
3273 | ||
3274 | /* If we didn't find anything, or what we found was a type, | |
3275 | then this wasn't really an id-expression. */ | |
3276 | if (TREE_CODE (decl) == TEMPLATE_DECL | |
3277 | && !DECL_FUNCTION_TEMPLATE_P (decl)) | |
3278 | { | |
3279 | *error_msg = "missing template arguments"; | |
3280 | return error_mark_node; | |
3281 | } | |
3282 | else if (TREE_CODE (decl) == TYPE_DECL | |
3283 | || TREE_CODE (decl) == NAMESPACE_DECL) | |
3284 | { | |
3285 | *error_msg = "expected primary-expression"; | |
3286 | return error_mark_node; | |
3287 | } | |
3288 | ||
3289 | /* If the name resolved to a template parameter, there is no | |
931a9c05 GB |
3290 | need to look it up again later. */ |
3291 | if ((TREE_CODE (decl) == CONST_DECL && DECL_TEMPLATE_PARM_P (decl)) | |
3292 | || TREE_CODE (decl) == TEMPLATE_PARM_INDEX) | |
b3445994 | 3293 | { |
db24eb1f | 3294 | tree r; |
c8094d83 | 3295 | |
b3445994 | 3296 | *idk = CP_ID_KIND_NONE; |
931a9c05 GB |
3297 | if (TREE_CODE (decl) == TEMPLATE_PARM_INDEX) |
3298 | decl = TEMPLATE_PARM_DECL (decl); | |
db24eb1f | 3299 | r = convert_from_reference (DECL_INITIAL (decl)); |
c8094d83 MS |
3300 | |
3301 | if (integral_constant_expression_p | |
68deab91 | 3302 | && !dependent_type_p (TREE_TYPE (decl)) |
db24eb1f | 3303 | && !(INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (r)))) |
931a9c05 | 3304 | { |
67c03833 | 3305 | if (!allow_non_integral_constant_expression_p) |
a82e1a7d | 3306 | error ("template parameter %qD of type %qT is not allowed in " |
931a9c05 GB |
3307 | "an integral constant expression because it is not of " |
3308 | "integral or enumeration type", decl, TREE_TYPE (decl)); | |
67c03833 | 3309 | *non_integral_constant_expression_p = true; |
931a9c05 | 3310 | } |
db24eb1f | 3311 | return r; |
931a9c05 | 3312 | } |
b3445994 MM |
3313 | else |
3314 | { | |
3315 | bool dependent_p; | |
3316 | ||
3317 | /* If the declaration was explicitly qualified indicate | |
3318 | that. The semantics of `A::f(3)' are different than | |
3319 | `f(3)' if `f' is virtual. */ | |
c8094d83 | 3320 | *idk = (scope |
b3445994 MM |
3321 | ? CP_ID_KIND_QUALIFIED |
3322 | : (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
3323 | ? CP_ID_KIND_TEMPLATE_ID | |
3324 | : CP_ID_KIND_UNQUALIFIED)); | |
3325 | ||
3326 | ||
3327 | /* [temp.dep.expr] | |
3328 | ||
3329 | An id-expression is type-dependent if it contains an | |
3330 | identifier that was declared with a dependent type. | |
3331 | ||
b3445994 MM |
3332 | The standard is not very specific about an id-expression that |
3333 | names a set of overloaded functions. What if some of them | |
3334 | have dependent types and some of them do not? Presumably, | |
3335 | such a name should be treated as a dependent name. */ | |
3336 | /* Assume the name is not dependent. */ | |
3337 | dependent_p = false; | |
3338 | if (!processing_template_decl) | |
3339 | /* No names are dependent outside a template. */ | |
3340 | ; | |
8d0d1915 JM |
3341 | else if (TREE_CODE (decl) == CONST_DECL) |
3342 | /* We don't want to treat enumerators as dependent. */ | |
3343 | ; | |
b3445994 MM |
3344 | /* A template-id where the name of the template was not resolved |
3345 | is definitely dependent. */ | |
3346 | else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR | |
9dc6f476 | 3347 | && (identifier_p (TREE_OPERAND (decl, 0)))) |
b3445994 MM |
3348 | dependent_p = true; |
3349 | /* For anything except an overloaded function, just check its | |
3350 | type. */ | |
3351 | else if (!is_overloaded_fn (decl)) | |
c8094d83 | 3352 | dependent_p |
b3445994 MM |
3353 | = dependent_type_p (TREE_TYPE (decl)); |
3354 | /* For a set of overloaded functions, check each of the | |
3355 | functions. */ | |
3356 | else | |
3357 | { | |
3358 | tree fns = decl; | |
3359 | ||
3360 | if (BASELINK_P (fns)) | |
3361 | fns = BASELINK_FUNCTIONS (fns); | |
3362 | ||
3363 | /* For a template-id, check to see if the template | |
3364 | arguments are dependent. */ | |
3365 | if (TREE_CODE (fns) == TEMPLATE_ID_EXPR) | |
3366 | { | |
3367 | tree args = TREE_OPERAND (fns, 1); | |
3368 | dependent_p = any_dependent_template_arguments_p (args); | |
3369 | /* The functions are those referred to by the | |
3370 | template-id. */ | |
3371 | fns = TREE_OPERAND (fns, 0); | |
3372 | } | |
3373 | ||
3374 | /* If there are no dependent template arguments, go through | |
cd0be382 | 3375 | the overloaded functions. */ |
b3445994 MM |
3376 | while (fns && !dependent_p) |
3377 | { | |
3378 | tree fn = OVL_CURRENT (fns); | |
3379 | ||
3380 | /* Member functions of dependent classes are | |
3381 | dependent. */ | |
3382 | if (TREE_CODE (fn) == FUNCTION_DECL | |
3383 | && type_dependent_expression_p (fn)) | |
3384 | dependent_p = true; | |
3385 | else if (TREE_CODE (fn) == TEMPLATE_DECL | |
3386 | && dependent_template_p (fn)) | |
3387 | dependent_p = true; | |
3388 | ||
3389 | fns = OVL_NEXT (fns); | |
3390 | } | |
3391 | } | |
3392 | ||
3393 | /* If the name was dependent on a template parameter, we will | |
3394 | resolve the name at instantiation time. */ | |
3395 | if (dependent_p) | |
3396 | { | |
3397 | /* Create a SCOPE_REF for qualified names, if the scope is | |
3398 | dependent. */ | |
3399 | if (scope) | |
3400 | { | |
02ed62dd MM |
3401 | if (TYPE_P (scope)) |
3402 | { | |
3403 | if (address_p && done) | |
3404 | decl = finish_qualified_id_expr (scope, decl, | |
3405 | done, address_p, | |
3406 | template_p, | |
a378996b PC |
3407 | template_arg_p, |
3408 | tf_warning_or_error); | |
7e361ae6 JM |
3409 | else |
3410 | { | |
3411 | tree type = NULL_TREE; | |
3412 | if (DECL_P (decl) && !dependent_scope_p (scope)) | |
3413 | type = TREE_TYPE (decl); | |
3414 | decl = build_qualified_name (type, | |
3415 | scope, | |
3416 | id_expression, | |
3417 | template_p); | |
3418 | } | |
02ed62dd MM |
3419 | } |
3420 | if (TREE_TYPE (decl)) | |
3421 | decl = convert_from_reference (decl); | |
3422 | return decl; | |
b3445994 MM |
3423 | } |
3424 | /* A TEMPLATE_ID already contains all the information we | |
3425 | need. */ | |
3426 | if (TREE_CODE (id_expression) == TEMPLATE_ID_EXPR) | |
3427 | return id_expression; | |
10b1d5e7 | 3428 | *idk = CP_ID_KIND_UNQUALIFIED_DEPENDENT; |
5a98fa7b MM |
3429 | /* If we found a variable, then name lookup during the |
3430 | instantiation will always resolve to the same VAR_DECL | |
3431 | (or an instantiation thereof). */ | |
5a6ccc94 | 3432 | if (VAR_P (decl) |
3c398f34 | 3433 | || TREE_CODE (decl) == PARM_DECL) |
80390766 JM |
3434 | { |
3435 | mark_used (decl); | |
3436 | return convert_from_reference (decl); | |
3437 | } | |
bad1f462 KL |
3438 | /* The same is true for FIELD_DECL, but we also need to |
3439 | make sure that the syntax is correct. */ | |
3440 | else if (TREE_CODE (decl) == FIELD_DECL) | |
a26ddf11 KL |
3441 | { |
3442 | /* Since SCOPE is NULL here, this is an unqualified name. | |
3443 | Access checking has been performed during name lookup | |
3444 | already. Turn off checking to avoid duplicate errors. */ | |
3445 | push_deferring_access_checks (dk_no_check); | |
3446 | decl = finish_non_static_data_member | |
2defb926 | 3447 | (decl, NULL_TREE, |
a26ddf11 KL |
3448 | /*qualifying_scope=*/NULL_TREE); |
3449 | pop_deferring_access_checks (); | |
3450 | return decl; | |
3451 | } | |
10b1d5e7 | 3452 | return id_expression; |
b3445994 MM |
3453 | } |
3454 | ||
415d4636 | 3455 | if (TREE_CODE (decl) == NAMESPACE_DECL) |
9e95d15f | 3456 | { |
a82e1a7d | 3457 | error ("use of namespace %qD as expression", decl); |
9e95d15f NS |
3458 | return error_mark_node; |
3459 | } | |
3460 | else if (DECL_CLASS_TEMPLATE_P (decl)) | |
3461 | { | |
a82e1a7d | 3462 | error ("use of class template %qT as expression", decl); |
9e95d15f NS |
3463 | return error_mark_node; |
3464 | } | |
3465 | else if (TREE_CODE (decl) == TREE_LIST) | |
3466 | { | |
3467 | /* Ambiguous reference to base members. */ | |
a82e1a7d | 3468 | error ("request for member %qD is ambiguous in " |
9e95d15f NS |
3469 | "multiple inheritance lattice", id_expression); |
3470 | print_candidates (decl); | |
3471 | return error_mark_node; | |
3472 | } | |
415d4636 MM |
3473 | |
3474 | /* Mark variable-like entities as used. Functions are similarly | |
3475 | marked either below or after overload resolution. */ | |
5a6ccc94 | 3476 | if ((VAR_P (decl) |
f27a59cf PC |
3477 | || TREE_CODE (decl) == PARM_DECL |
3478 | || TREE_CODE (decl) == CONST_DECL | |
3479 | || TREE_CODE (decl) == RESULT_DECL) | |
3480 | && !mark_used (decl)) | |
3481 | return error_mark_node; | |
415d4636 | 3482 | |
aef4a215 | 3483 | /* Only certain kinds of names are allowed in constant |
8d0d1915 | 3484 | expression. Template parameters have already |
aef4a215 | 3485 | been handled above. */ |
7f7d4b12 DS |
3486 | if (! error_operand_p (decl) |
3487 | && integral_constant_expression_p | |
aef4a215 | 3488 | && ! decl_constant_var_p (decl) |
8d0d1915 | 3489 | && TREE_CODE (decl) != CONST_DECL |
aef4a215 JM |
3490 | && ! builtin_valid_in_constant_expr_p (decl)) |
3491 | { | |
3492 | if (!allow_non_integral_constant_expression_p) | |
3493 | { | |
3494 | error ("%qD cannot appear in a constant-expression", decl); | |
3495 | return error_mark_node; | |
3496 | } | |
3497 | *non_integral_constant_expression_p = true; | |
3498 | } | |
3499 | ||
7c424acd | 3500 | tree wrap; |
5a6ccc94 | 3501 | if (VAR_P (decl) |
7c424acd | 3502 | && !cp_unevaluated_operand |
56363ffd | 3503 | && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)) |
7c424acd JM |
3504 | && DECL_THREAD_LOCAL_P (decl) |
3505 | && (wrap = get_tls_wrapper_fn (decl))) | |
3506 | { | |
3507 | /* Replace an evaluated use of the thread_local variable with | |
3508 | a call to its wrapper. */ | |
3509 | decl = build_cxx_call (wrap, 0, NULL, tf_warning_or_error); | |
3510 | } | |
4a4f287d BO |
3511 | else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR |
3512 | && variable_template_p (TREE_OPERAND (decl, 0))) | |
3513 | { | |
3514 | decl = finish_template_variable (decl); | |
5e0231c2 | 3515 | mark_used (decl); |
4a4f287d | 3516 | } |
7c424acd | 3517 | else if (scope) |
415d4636 | 3518 | { |
c8094d83 | 3519 | decl = (adjust_result_of_qualified_name_lookup |
90677b8d | 3520 | (decl, scope, current_nonlambda_class_type())); |
e20bcc5e JH |
3521 | |
3522 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
3523 | mark_used (decl); | |
3524 | ||
e467c9d2 | 3525 | if (TYPE_P (scope)) |
02ed62dd MM |
3526 | decl = finish_qualified_id_expr (scope, |
3527 | decl, | |
3528 | done, | |
3529 | address_p, | |
3530 | template_p, | |
a378996b PC |
3531 | template_arg_p, |
3532 | tf_warning_or_error); | |
db24eb1f | 3533 | else |
e467c9d2 | 3534 | decl = convert_from_reference (decl); |
415d4636 | 3535 | } |
9e95d15f | 3536 | else if (TREE_CODE (decl) == FIELD_DECL) |
a26ddf11 KL |
3537 | { |
3538 | /* Since SCOPE is NULL here, this is an unqualified name. | |
3539 | Access checking has been performed during name lookup | |
3540 | already. Turn off checking to avoid duplicate errors. */ | |
3541 | push_deferring_access_checks (dk_no_check); | |
2defb926 | 3542 | decl = finish_non_static_data_member (decl, NULL_TREE, |
a26ddf11 KL |
3543 | /*qualifying_scope=*/NULL_TREE); |
3544 | pop_deferring_access_checks (); | |
3545 | } | |
9e95d15f NS |
3546 | else if (is_overloaded_fn (decl)) |
3547 | { | |
eff3a276 | 3548 | tree first_fn; |
b3445994 | 3549 | |
294e855f | 3550 | first_fn = get_first_fn (decl); |
9e95d15f NS |
3551 | if (TREE_CODE (first_fn) == TEMPLATE_DECL) |
3552 | first_fn = DECL_TEMPLATE_RESULT (first_fn); | |
415d4636 | 3553 | |
9965f21f PC |
3554 | if (!really_overloaded_fn (decl) |
3555 | && !mark_used (first_fn)) | |
3556 | return error_mark_node; | |
415d4636 | 3557 | |
02ed62dd MM |
3558 | if (!template_arg_p |
3559 | && TREE_CODE (first_fn) == FUNCTION_DECL | |
821eaf2a MM |
3560 | && DECL_FUNCTION_MEMBER_P (first_fn) |
3561 | && !shared_member_p (decl)) | |
9e95d15f NS |
3562 | { |
3563 | /* A set of member functions. */ | |
3564 | decl = maybe_dummy_object (DECL_CONTEXT (first_fn), 0); | |
02ed62dd | 3565 | return finish_class_member_access_expr (decl, id_expression, |
5ade1ed2 DG |
3566 | /*template_p=*/false, |
3567 | tf_warning_or_error); | |
9e95d15f | 3568 | } |
eff3a276 MM |
3569 | |
3570 | decl = baselink_for_fns (decl); | |
9e95d15f NS |
3571 | } |
3572 | else | |
3573 | { | |
9e95d15f | 3574 | if (DECL_P (decl) && DECL_NONLOCAL (decl) |
24f58e74 | 3575 | && DECL_CLASS_SCOPE_P (decl)) |
9e95d15f | 3576 | { |
24f58e74 PC |
3577 | tree context = context_for_name_lookup (decl); |
3578 | if (context != current_class_type) | |
3579 | { | |
3580 | tree path = currently_open_derived_class (context); | |
3581 | perform_or_defer_access_check (TYPE_BINFO (path), | |
0e69fdf0 PC |
3582 | decl, decl, |
3583 | tf_warning_or_error); | |
24f58e74 | 3584 | } |
9e95d15f | 3585 | } |
c8094d83 | 3586 | |
db24eb1f | 3587 | decl = convert_from_reference (decl); |
9e95d15f | 3588 | } |
b3445994 MM |
3589 | } |
3590 | ||
98cf9ac9 PC |
3591 | /* Handle references (c++/56130). */ |
3592 | tree t = REFERENCE_REF_P (decl) ? TREE_OPERAND (decl, 0) : decl; | |
3593 | if (TREE_DEPRECATED (t)) | |
3594 | warn_deprecated_use (t, NULL_TREE); | |
b3445994 MM |
3595 | |
3596 | return decl; | |
3597 | } | |
3598 | ||
0213a355 JM |
3599 | /* Implement the __typeof keyword: Return the type of EXPR, suitable for |
3600 | use as a type-specifier. */ | |
3601 | ||
b894fc05 | 3602 | tree |
3a978d72 | 3603 | finish_typeof (tree expr) |
b894fc05 | 3604 | { |
65a5559b MM |
3605 | tree type; |
3606 | ||
dffbbe80 | 3607 | if (type_dependent_expression_p (expr)) |
b894fc05 | 3608 | { |
9e1e64ec | 3609 | type = cxx_make_type (TYPEOF_TYPE); |
eb34af89 | 3610 | TYPEOF_TYPE_EXPR (type) = expr; |
3ad6a8e1 | 3611 | SET_TYPE_STRUCTURAL_EQUALITY (type); |
b894fc05 | 3612 | |
65a5559b | 3613 | return type; |
b894fc05 JM |
3614 | } |
3615 | ||
03a904b5 JJ |
3616 | expr = mark_type_use (expr); |
3617 | ||
3c38f0ff | 3618 | type = unlowered_expr_type (expr); |
65a5559b MM |
3619 | |
3620 | if (!type || type == unknown_type_node) | |
3621 | { | |
a82e1a7d | 3622 | error ("type of %qE is unknown", expr); |
65a5559b MM |
3623 | return error_mark_node; |
3624 | } | |
3625 | ||
3626 | return type; | |
b894fc05 | 3627 | } |
558475f0 | 3628 | |
a0d260fc PC |
3629 | /* Implement the __underlying_type keyword: Return the underlying |
3630 | type of TYPE, suitable for use as a type-specifier. */ | |
3631 | ||
3632 | tree | |
3633 | finish_underlying_type (tree type) | |
3634 | { | |
3635 | tree underlying_type; | |
3636 | ||
3637 | if (processing_template_decl) | |
3638 | { | |
3639 | underlying_type = cxx_make_type (UNDERLYING_TYPE); | |
3640 | UNDERLYING_TYPE_TYPE (underlying_type) = type; | |
3641 | SET_TYPE_STRUCTURAL_EQUALITY (underlying_type); | |
3642 | ||
3643 | return underlying_type; | |
3644 | } | |
3645 | ||
3646 | complete_type (type); | |
3647 | ||
3648 | if (TREE_CODE (type) != ENUMERAL_TYPE) | |
3649 | { | |
ca2507dc | 3650 | error ("%qT is not an enumeration type", type); |
a0d260fc PC |
3651 | return error_mark_node; |
3652 | } | |
3653 | ||
3654 | underlying_type = ENUM_UNDERLYING_TYPE (type); | |
3655 | ||
3656 | /* Fixup necessary in this case because ENUM_UNDERLYING_TYPE | |
3657 | includes TYPE_MIN_VALUE and TYPE_MAX_VALUE information. | |
3658 | See finish_enum_value_list for details. */ | |
3659 | if (!ENUM_FIXED_UNDERLYING_TYPE_P (type)) | |
3660 | underlying_type | |
3661 | = c_common_type_for_mode (TYPE_MODE (underlying_type), | |
3662 | TYPE_UNSIGNED (underlying_type)); | |
3663 | ||
3664 | return underlying_type; | |
3665 | } | |
3666 | ||
4daba884 BK |
3667 | /* Implement the __direct_bases keyword: Return the direct base classes |
3668 | of type */ | |
3669 | ||
3670 | tree | |
3671 | calculate_direct_bases (tree type) | |
3672 | { | |
9771b263 | 3673 | vec<tree, va_gc> *vector = make_tree_vector(); |
4daba884 | 3674 | tree bases_vec = NULL_TREE; |
9771b263 | 3675 | vec<tree, va_gc> *base_binfos; |
4daba884 BK |
3676 | tree binfo; |
3677 | unsigned i; | |
3678 | ||
3679 | complete_type (type); | |
3680 | ||
3681 | if (!NON_UNION_CLASS_TYPE_P (type)) | |
3682 | return make_tree_vec (0); | |
3683 | ||
3684 | base_binfos = BINFO_BASE_BINFOS (TYPE_BINFO (type)); | |
3685 | ||
3686 | /* Virtual bases are initialized first */ | |
9771b263 | 3687 | for (i = 0; base_binfos->iterate (i, &binfo); i++) |
4daba884 BK |
3688 | { |
3689 | if (BINFO_VIRTUAL_P (binfo)) | |
3690 | { | |
9771b263 | 3691 | vec_safe_push (vector, binfo); |
4daba884 BK |
3692 | } |
3693 | } | |
3694 | ||
3695 | /* Now non-virtuals */ | |
9771b263 | 3696 | for (i = 0; base_binfos->iterate (i, &binfo); i++) |
4daba884 BK |
3697 | { |
3698 | if (!BINFO_VIRTUAL_P (binfo)) | |
3699 | { | |
9771b263 | 3700 | vec_safe_push (vector, binfo); |
4daba884 BK |
3701 | } |
3702 | } | |
3703 | ||
3704 | ||
9771b263 | 3705 | bases_vec = make_tree_vec (vector->length ()); |
4daba884 | 3706 | |
9771b263 | 3707 | for (i = 0; i < vector->length (); ++i) |
4daba884 | 3708 | { |
9771b263 | 3709 | TREE_VEC_ELT (bases_vec, i) = BINFO_TYPE ((*vector)[i]); |
4daba884 BK |
3710 | } |
3711 | return bases_vec; | |
3712 | } | |
3713 | ||
3714 | /* Implement the __bases keyword: Return the base classes | |
3715 | of type */ | |
3716 | ||
3717 | /* Find morally non-virtual base classes by walking binfo hierarchy */ | |
3718 | /* Virtual base classes are handled separately in finish_bases */ | |
3719 | ||
3720 | static tree | |
12308bc6 | 3721 | dfs_calculate_bases_pre (tree binfo, void * /*data_*/) |
4daba884 BK |
3722 | { |
3723 | /* Don't walk bases of virtual bases */ | |
3724 | return BINFO_VIRTUAL_P (binfo) ? dfs_skip_bases : NULL_TREE; | |
3725 | } | |
3726 | ||
3727 | static tree | |
3728 | dfs_calculate_bases_post (tree binfo, void *data_) | |
3729 | { | |
9771b263 | 3730 | vec<tree, va_gc> **data = ((vec<tree, va_gc> **) data_); |
4daba884 BK |
3731 | if (!BINFO_VIRTUAL_P (binfo)) |
3732 | { | |
9771b263 | 3733 | vec_safe_push (*data, BINFO_TYPE (binfo)); |
4daba884 BK |
3734 | } |
3735 | return NULL_TREE; | |
3736 | } | |
3737 | ||
3738 | /* Calculates the morally non-virtual base classes of a class */ | |
9771b263 | 3739 | static vec<tree, va_gc> * |
4daba884 BK |
3740 | calculate_bases_helper (tree type) |
3741 | { | |
9771b263 | 3742 | vec<tree, va_gc> *vector = make_tree_vector(); |
4daba884 BK |
3743 | |
3744 | /* Now add non-virtual base classes in order of construction */ | |
3745 | dfs_walk_all (TYPE_BINFO (type), | |
3746 | dfs_calculate_bases_pre, dfs_calculate_bases_post, &vector); | |
3747 | return vector; | |
3748 | } | |
3749 | ||
3750 | tree | |
3751 | calculate_bases (tree type) | |
3752 | { | |
9771b263 | 3753 | vec<tree, va_gc> *vector = make_tree_vector(); |
4daba884 BK |
3754 | tree bases_vec = NULL_TREE; |
3755 | unsigned i; | |
9771b263 DN |
3756 | vec<tree, va_gc> *vbases; |
3757 | vec<tree, va_gc> *nonvbases; | |
4daba884 BK |
3758 | tree binfo; |
3759 | ||
3760 | complete_type (type); | |
3761 | ||
3762 | if (!NON_UNION_CLASS_TYPE_P (type)) | |
3763 | return make_tree_vec (0); | |
3764 | ||
3765 | /* First go through virtual base classes */ | |
3766 | for (vbases = CLASSTYPE_VBASECLASSES (type), i = 0; | |
9771b263 | 3767 | vec_safe_iterate (vbases, i, &binfo); i++) |
4daba884 | 3768 | { |
9771b263 DN |
3769 | vec<tree, va_gc> *vbase_bases; |
3770 | vbase_bases = calculate_bases_helper (BINFO_TYPE (binfo)); | |
3771 | vec_safe_splice (vector, vbase_bases); | |
4daba884 BK |
3772 | release_tree_vector (vbase_bases); |
3773 | } | |
3774 | ||
3775 | /* Now for the non-virtual bases */ | |
3776 | nonvbases = calculate_bases_helper (type); | |
9771b263 | 3777 | vec_safe_splice (vector, nonvbases); |
4daba884 BK |
3778 | release_tree_vector (nonvbases); |
3779 | ||
3780 | /* Last element is entire class, so don't copy */ | |
9771b263 | 3781 | bases_vec = make_tree_vec (vector->length () - 1); |
4daba884 | 3782 | |
9771b263 | 3783 | for (i = 0; i < vector->length () - 1; ++i) |
4daba884 | 3784 | { |
9771b263 | 3785 | TREE_VEC_ELT (bases_vec, i) = (*vector)[i]; |
4daba884 BK |
3786 | } |
3787 | release_tree_vector (vector); | |
3788 | return bases_vec; | |
3789 | } | |
3790 | ||
3791 | tree | |
3792 | finish_bases (tree type, bool direct) | |
3793 | { | |
3794 | tree bases = NULL_TREE; | |
3795 | ||
3796 | if (!processing_template_decl) | |
3797 | { | |
3798 | /* Parameter packs can only be used in templates */ | |
3799 | error ("Parameter pack __bases only valid in template declaration"); | |
3800 | return error_mark_node; | |
3801 | } | |
3802 | ||
3803 | bases = cxx_make_type (BASES); | |
3804 | BASES_TYPE (bases) = type; | |
3805 | BASES_DIRECT (bases) = direct; | |
3806 | SET_TYPE_STRUCTURAL_EQUALITY (bases); | |
3807 | ||
3808 | return bases; | |
3809 | } | |
3810 | ||
c291f8b1 VR |
3811 | /* Perform C++-specific checks for __builtin_offsetof before calling |
3812 | fold_offsetof. */ | |
3813 | ||
3814 | tree | |
3815 | finish_offsetof (tree expr) | |
3816 | { | |
4c65a534 VR |
3817 | if (TREE_CODE (expr) == PSEUDO_DTOR_EXPR) |
3818 | { | |
3819 | error ("cannot apply %<offsetof%> to destructor %<~%T%>", | |
3820 | TREE_OPERAND (expr, 2)); | |
3821 | return error_mark_node; | |
3822 | } | |
c291f8b1 VR |
3823 | if (TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE |
3824 | || TREE_CODE (TREE_TYPE (expr)) == METHOD_TYPE | |
fbfc8363 | 3825 | || TREE_TYPE (expr) == unknown_type_node) |
c291f8b1 | 3826 | { |
98cf9ac9 | 3827 | if (INDIRECT_REF_P (expr)) |
929f647a PC |
3828 | error ("second operand of %<offsetof%> is neither a single " |
3829 | "identifier nor a sequence of member accesses and " | |
3830 | "array references"); | |
3831 | else | |
3832 | { | |
3833 | if (TREE_CODE (expr) == COMPONENT_REF | |
3834 | || TREE_CODE (expr) == COMPOUND_EXPR) | |
3835 | expr = TREE_OPERAND (expr, 1); | |
3836 | error ("cannot apply %<offsetof%> to member function %qD", expr); | |
3837 | } | |
c291f8b1 VR |
3838 | return error_mark_node; |
3839 | } | |
31e292c7 | 3840 | if (REFERENCE_REF_P (expr)) |
60c4d135 | 3841 | expr = TREE_OPERAND (expr, 0); |
a174e38c JM |
3842 | if (TREE_CODE (expr) == COMPONENT_REF) |
3843 | { | |
3844 | tree object = TREE_OPERAND (expr, 0); | |
3845 | if (!complete_type_or_else (TREE_TYPE (object), object)) | |
3846 | return error_mark_node; | |
3847 | } | |
cf9e9959 | 3848 | return fold_offsetof (expr); |
c291f8b1 VR |
3849 | } |
3850 | ||
9eeb200f JM |
3851 | /* Replace the AGGR_INIT_EXPR at *TP with an equivalent CALL_EXPR. This |
3852 | function is broken out from the above for the benefit of the tree-ssa | |
3853 | project. */ | |
3854 | ||
3855 | void | |
3856 | simplify_aggr_init_expr (tree *tp) | |
3857 | { | |
3858 | tree aggr_init_expr = *tp; | |
3859 | ||
3eb24f73 | 3860 | /* Form an appropriate CALL_EXPR. */ |
5039610b SL |
3861 | tree fn = AGGR_INIT_EXPR_FN (aggr_init_expr); |
3862 | tree slot = AGGR_INIT_EXPR_SLOT (aggr_init_expr); | |
2692eb7d | 3863 | tree type = TREE_TYPE (slot); |
9eeb200f JM |
3864 | |
3865 | tree call_expr; | |
3866 | enum style_t { ctor, arg, pcc } style; | |
4977bab6 | 3867 | |
3eb24f73 | 3868 | if (AGGR_INIT_VIA_CTOR_P (aggr_init_expr)) |
4977bab6 ZW |
3869 | style = ctor; |
3870 | #ifdef PCC_STATIC_STRUCT_RETURN | |
3871 | else if (1) | |
3872 | style = pcc; | |
3873 | #endif | |
4977bab6 | 3874 | else |
315fb5db NS |
3875 | { |
3876 | gcc_assert (TREE_ADDRESSABLE (type)); | |
3877 | style = arg; | |
3878 | } | |
4977bab6 | 3879 | |
db3927fb AH |
3880 | call_expr = build_call_array_loc (input_location, |
3881 | TREE_TYPE (TREE_TYPE (TREE_TYPE (fn))), | |
3882 | fn, | |
3883 | aggr_init_expr_nargs (aggr_init_expr), | |
3884 | AGGR_INIT_EXPR_ARGP (aggr_init_expr)); | |
d8a0d13e | 3885 | TREE_NOTHROW (call_expr) = TREE_NOTHROW (aggr_init_expr); |
fe6ebcf1 | 3886 | CALL_EXPR_LIST_INIT_P (call_expr) = CALL_EXPR_LIST_INIT_P (aggr_init_expr); |
5039610b | 3887 | |
fa47911c | 3888 | if (style == ctor) |
3eb24f73 | 3889 | { |
fa47911c JM |
3890 | /* Replace the first argument to the ctor with the address of the |
3891 | slot. */ | |
dffd7eb6 | 3892 | cxx_mark_addressable (slot); |
5039610b SL |
3893 | CALL_EXPR_ARG (call_expr, 0) = |
3894 | build1 (ADDR_EXPR, build_pointer_type (type), slot); | |
3eb24f73 | 3895 | } |
5039610b | 3896 | else if (style == arg) |
fa47911c JM |
3897 | { |
3898 | /* Just mark it addressable here, and leave the rest to | |
3899 | expand_call{,_inline}. */ | |
3900 | cxx_mark_addressable (slot); | |
3901 | CALL_EXPR_RETURN_SLOT_OPT (call_expr) = true; | |
71d1add3 | 3902 | call_expr = build2 (INIT_EXPR, TREE_TYPE (call_expr), slot, call_expr); |
fa47911c | 3903 | } |
4977bab6 | 3904 | else if (style == pcc) |
3eb24f73 | 3905 | { |
4977bab6 ZW |
3906 | /* If we're using the non-reentrant PCC calling convention, then we |
3907 | need to copy the returned value out of the static buffer into the | |
3908 | SLOT. */ | |
78757caa | 3909 | push_deferring_access_checks (dk_no_check); |
71d1add3 JM |
3910 | call_expr = build_aggr_init (slot, call_expr, |
3911 | DIRECT_BIND | LOOKUP_ONLYCONVERTING, | |
3912 | tf_warning_or_error); | |
78757caa | 3913 | pop_deferring_access_checks (); |
71d1add3 | 3914 | call_expr = build2 (COMPOUND_EXPR, TREE_TYPE (slot), call_expr, slot); |
4561285b JM |
3915 | } |
3916 | ||
450a927a JM |
3917 | if (AGGR_INIT_ZERO_FIRST (aggr_init_expr)) |
3918 | { | |
3919 | tree init = build_zero_init (type, NULL_TREE, | |
3920 | /*static_storage_p=*/false); | |
3921 | init = build2 (INIT_EXPR, void_type_node, slot, init); | |
71d1add3 JM |
3922 | call_expr = build2 (COMPOUND_EXPR, TREE_TYPE (call_expr), |
3923 | init, call_expr); | |
450a927a JM |
3924 | } |
3925 | ||
71d1add3 | 3926 | *tp = call_expr; |
3eb24f73 MM |
3927 | } |
3928 | ||
31f8e4f3 MM |
3929 | /* Emit all thunks to FN that should be emitted when FN is emitted. */ |
3930 | ||
e89d6010 | 3931 | void |
3a978d72 | 3932 | emit_associated_thunks (tree fn) |
31f8e4f3 MM |
3933 | { |
3934 | /* When we use vcall offsets, we emit thunks with the virtual | |
3935 | functions to which they thunk. The whole point of vcall offsets | |
3936 | is so that you can know statically the entire set of thunks that | |
3937 | will ever be needed for a given virtual function, thereby | |
3938 | enabling you to output all the thunks with the function itself. */ | |
4537ec0c DN |
3939 | if (DECL_VIRTUAL_P (fn) |
3940 | /* Do not emit thunks for extern template instantiations. */ | |
3941 | && ! DECL_REALLY_EXTERN (fn)) | |
31f8e4f3 | 3942 | { |
bb5e8a7f | 3943 | tree thunk; |
c8094d83 | 3944 | |
910ad8de | 3945 | for (thunk = DECL_THUNKS (fn); thunk; thunk = DECL_CHAIN (thunk)) |
4977bab6 | 3946 | { |
e00853fd | 3947 | if (!THUNK_ALIAS (thunk)) |
4977bab6 | 3948 | { |
bb885938 NS |
3949 | use_thunk (thunk, /*emit_p=*/1); |
3950 | if (DECL_RESULT_THUNK_P (thunk)) | |
3951 | { | |
3952 | tree probe; | |
c8094d83 | 3953 | |
bb885938 | 3954 | for (probe = DECL_THUNKS (thunk); |
910ad8de | 3955 | probe; probe = DECL_CHAIN (probe)) |
bb885938 NS |
3956 | use_thunk (probe, /*emit_p=*/1); |
3957 | } | |
4977bab6 | 3958 | } |
bb885938 | 3959 | else |
50bc768d | 3960 | gcc_assert (!DECL_THUNKS (thunk)); |
4977bab6 | 3961 | } |
31f8e4f3 MM |
3962 | } |
3963 | } | |
3964 | ||
f732fa7b | 3965 | /* Returns true iff FUN is an instantiation of a constexpr function |
e89ff446 | 3966 | template or a defaulted constexpr function. */ |
f732fa7b JM |
3967 | |
3968 | static inline bool | |
3969 | is_instantiation_of_constexpr (tree fun) | |
3970 | { | |
e89ff446 JM |
3971 | return ((DECL_TEMPLOID_INSTANTIATION (fun) |
3972 | && DECL_DECLARED_CONSTEXPR_P (DECL_TI_TEMPLATE (fun))) | |
3973 | || (DECL_DEFAULTED_FN (fun) | |
3974 | && DECL_DECLARED_CONSTEXPR_P (fun))); | |
3975 | ||
f732fa7b JM |
3976 | } |
3977 | ||
558475f0 MM |
3978 | /* Generate RTL for FN. */ |
3979 | ||
b2583345 JJ |
3980 | bool |
3981 | expand_or_defer_fn_1 (tree fn) | |
8cd2462c JH |
3982 | { |
3983 | /* When the parser calls us after finishing the body of a template | |
c353b8e3 MM |
3984 | function, we don't really want to expand the body. */ |
3985 | if (processing_template_decl) | |
8cd2462c JH |
3986 | { |
3987 | /* Normally, collection only occurs in rest_of_compilation. So, | |
3988 | if we don't collect here, we never collect junk generated | |
3989 | during the processing of templates until we hit a | |
27250734 MM |
3990 | non-template function. It's not safe to do this inside a |
3991 | nested class, though, as the parser may have local state that | |
3992 | is not a GC root. */ | |
3993 | if (!function_depth) | |
3994 | ggc_collect (); | |
b2583345 | 3995 | return false; |
8cd2462c JH |
3996 | } |
3997 | ||
a406865a | 3998 | gcc_assert (DECL_SAVED_TREE (fn)); |
726a989a | 3999 | |
4684cd27 MM |
4000 | /* We make a decision about linkage for these functions at the end |
4001 | of the compilation. Until that point, we do not want the back | |
4002 | end to output them -- but we do want it to see the bodies of | |
1a10290c | 4003 | these functions so that it can inline them as appropriate. */ |
4684cd27 MM |
4004 | if (DECL_DECLARED_INLINE_P (fn) || DECL_IMPLICIT_INSTANTIATION (fn)) |
4005 | { | |
1ef0df47 MM |
4006 | if (DECL_INTERFACE_KNOWN (fn)) |
4007 | /* We've already made a decision as to how this function will | |
4008 | be handled. */; | |
4009 | else if (!at_eof) | |
944b63db | 4010 | tentative_decl_linkage (fn); |
4684cd27 MM |
4011 | else |
4012 | import_export_decl (fn); | |
1a10290c MM |
4013 | |
4014 | /* If the user wants us to keep all inline functions, then mark | |
4015 | this function as needed so that finish_file will make sure to | |
fe2978fb MM |
4016 | output it later. Similarly, all dllexport'd functions must |
4017 | be emitted; there may be callers in other DLLs. */ | |
322d490e KT |
4018 | if (DECL_DECLARED_INLINE_P (fn) |
4019 | && !DECL_REALLY_EXTERN (fn) | |
4020 | && (flag_keep_inline_functions | |
4021 | || (flag_keep_inline_dllexport | |
4022 | && lookup_attribute ("dllexport", DECL_ATTRIBUTES (fn))))) | |
ffca9d53 JM |
4023 | { |
4024 | mark_needed (fn); | |
4025 | DECL_EXTERNAL (fn) = 0; | |
4026 | } | |
4684cd27 MM |
4027 | } |
4028 | ||
1f26ac87 JM |
4029 | /* If this is a constructor or destructor body, we have to clone |
4030 | it. */ | |
4031 | if (maybe_clone_body (fn)) | |
4032 | { | |
4033 | /* We don't want to process FN again, so pretend we've written | |
4034 | it out, even though we haven't. */ | |
4035 | TREE_ASM_WRITTEN (fn) = 1; | |
4036 | /* If this is an instantiation of a constexpr function, keep | |
4037 | DECL_SAVED_TREE for explain_invalid_constexpr_fn. */ | |
4038 | if (!is_instantiation_of_constexpr (fn)) | |
4039 | DECL_SAVED_TREE (fn) = NULL_TREE; | |
4040 | return false; | |
4041 | } | |
4042 | ||
8cd2462c JH |
4043 | /* There's no reason to do any of the work here if we're only doing |
4044 | semantic analysis; this code just generates RTL. */ | |
4045 | if (flag_syntax_only) | |
b2583345 JJ |
4046 | return false; |
4047 | ||
4048 | return true; | |
4049 | } | |
8cd2462c | 4050 | |
b2583345 JJ |
4051 | void |
4052 | expand_or_defer_fn (tree fn) | |
4053 | { | |
4054 | if (expand_or_defer_fn_1 (fn)) | |
4055 | { | |
4056 | function_depth++; | |
99edd65d | 4057 | |
b2583345 JJ |
4058 | /* Expand or defer, at the whim of the compilation unit manager. */ |
4059 | cgraph_finalize_function (fn, function_depth > 1); | |
6744a6ab | 4060 | emit_associated_thunks (fn); |
99edd65d | 4061 | |
b2583345 JJ |
4062 | function_depth--; |
4063 | } | |
8cd2462c JH |
4064 | } |
4065 | ||
6de9cd9a DN |
4066 | struct nrv_data |
4067 | { | |
c203e8a7 TS |
4068 | nrv_data () : visited (37) {} |
4069 | ||
6de9cd9a DN |
4070 | tree var; |
4071 | tree result; | |
c203e8a7 | 4072 | hash_table<pointer_hash <tree_node> > visited; |
6de9cd9a | 4073 | }; |
0d97bf4c | 4074 | |
6de9cd9a DN |
4075 | /* Helper function for walk_tree, used by finalize_nrv below. */ |
4076 | ||
4077 | static tree | |
4078 | finalize_nrv_r (tree* tp, int* walk_subtrees, void* data) | |
0d97bf4c | 4079 | { |
6de9cd9a | 4080 | struct nrv_data *dp = (struct nrv_data *)data; |
703c8606 | 4081 | tree_node **slot; |
07b2f2fd JM |
4082 | |
4083 | /* No need to walk into types. There wouldn't be any need to walk into | |
4084 | non-statements, except that we have to consider STMT_EXPRs. */ | |
0d97bf4c JM |
4085 | if (TYPE_P (*tp)) |
4086 | *walk_subtrees = 0; | |
6de9cd9a DN |
4087 | /* Change all returns to just refer to the RESULT_DECL; this is a nop, |
4088 | but differs from using NULL_TREE in that it indicates that we care | |
4089 | about the value of the RESULT_DECL. */ | |
5088b058 RH |
4090 | else if (TREE_CODE (*tp) == RETURN_EXPR) |
4091 | TREE_OPERAND (*tp, 0) = dp->result; | |
6de9cd9a DN |
4092 | /* Change all cleanups for the NRV to only run when an exception is |
4093 | thrown. */ | |
07b2f2fd | 4094 | else if (TREE_CODE (*tp) == CLEANUP_STMT |
6de9cd9a | 4095 | && CLEANUP_DECL (*tp) == dp->var) |
659e5a7a | 4096 | CLEANUP_EH_ONLY (*tp) = 1; |
350fae66 | 4097 | /* Replace the DECL_EXPR for the NRV with an initialization of the |
6de9cd9a | 4098 | RESULT_DECL, if needed. */ |
350fae66 RK |
4099 | else if (TREE_CODE (*tp) == DECL_EXPR |
4100 | && DECL_EXPR_DECL (*tp) == dp->var) | |
6de9cd9a DN |
4101 | { |
4102 | tree init; | |
4103 | if (DECL_INITIAL (dp->var) | |
4104 | && DECL_INITIAL (dp->var) != error_mark_node) | |
2d188530 JJ |
4105 | init = build2 (INIT_EXPR, void_type_node, dp->result, |
4106 | DECL_INITIAL (dp->var)); | |
6de9cd9a | 4107 | else |
c2255bc4 | 4108 | init = build_empty_stmt (EXPR_LOCATION (*tp)); |
2d188530 | 4109 | DECL_INITIAL (dp->var) = NULL_TREE; |
5e278028 | 4110 | SET_EXPR_LOCATION (init, EXPR_LOCATION (*tp)); |
6de9cd9a DN |
4111 | *tp = init; |
4112 | } | |
4113 | /* And replace all uses of the NRV with the RESULT_DECL. */ | |
4114 | else if (*tp == dp->var) | |
4115 | *tp = dp->result; | |
4116 | ||
4117 | /* Avoid walking into the same tree more than once. Unfortunately, we | |
4118 | can't just use walk_tree_without duplicates because it would only call | |
4119 | us for the first occurrence of dp->var in the function body. */ | |
703c8606 | 4120 | slot = dp->visited.find_slot (*tp, INSERT); |
6de9cd9a DN |
4121 | if (*slot) |
4122 | *walk_subtrees = 0; | |
4123 | else | |
4124 | *slot = *tp; | |
0d97bf4c JM |
4125 | |
4126 | /* Keep iterating. */ | |
4127 | return NULL_TREE; | |
4128 | } | |
4129 | ||
6de9cd9a | 4130 | /* Called from finish_function to implement the named return value |
5088b058 | 4131 | optimization by overriding all the RETURN_EXPRs and pertinent |
6de9cd9a DN |
4132 | CLEANUP_STMTs and replacing all occurrences of VAR with RESULT, the |
4133 | RESULT_DECL for the function. */ | |
f444e36b | 4134 | |
4985cde3 | 4135 | void |
6de9cd9a | 4136 | finalize_nrv (tree *tp, tree var, tree result) |
f444e36b | 4137 | { |
6de9cd9a DN |
4138 | struct nrv_data data; |
4139 | ||
add86e09 | 4140 | /* Copy name from VAR to RESULT. */ |
6de9cd9a | 4141 | DECL_NAME (result) = DECL_NAME (var); |
6de9cd9a DN |
4142 | /* Don't forget that we take its address. */ |
4143 | TREE_ADDRESSABLE (result) = TREE_ADDRESSABLE (var); | |
add86e09 JJ |
4144 | /* Finally set DECL_VALUE_EXPR to avoid assigning |
4145 | a stack slot at -O0 for the original var and debug info | |
4146 | uses RESULT location for VAR. */ | |
4147 | SET_DECL_VALUE_EXPR (var, result); | |
4148 | DECL_HAS_VALUE_EXPR_P (var) = 1; | |
6de9cd9a DN |
4149 | |
4150 | data.var = var; | |
4151 | data.result = result; | |
14588106 | 4152 | cp_walk_tree (tp, finalize_nrv_r, &data, 0); |
b850de4f | 4153 | } |
1799e5d5 | 4154 | \f |
a68ab351 JJ |
4155 | /* Create CP_OMP_CLAUSE_INFO for clause C. Returns true if it is invalid. */ |
4156 | ||
4157 | bool | |
4158 | cxx_omp_create_clause_info (tree c, tree type, bool need_default_ctor, | |
acf0174b JJ |
4159 | bool need_copy_ctor, bool need_copy_assignment, |
4160 | bool need_dtor) | |
a68ab351 JJ |
4161 | { |
4162 | int save_errorcount = errorcount; | |
4163 | tree info, t; | |
4164 | ||
4165 | /* Always allocate 3 elements for simplicity. These are the | |
4166 | function decls for the ctor, dtor, and assignment op. | |
4167 | This layout is known to the three lang hooks, | |
4168 | cxx_omp_clause_default_init, cxx_omp_clause_copy_init, | |
4169 | and cxx_omp_clause_assign_op. */ | |
4170 | info = make_tree_vec (3); | |
4171 | CP_OMP_CLAUSE_INFO (c) = info; | |
4172 | ||
ac177431 | 4173 | if (need_default_ctor || need_copy_ctor) |
a68ab351 JJ |
4174 | { |
4175 | if (need_default_ctor) | |
ac177431 | 4176 | t = get_default_ctor (type); |
a68ab351 | 4177 | else |
4577f730 | 4178 | t = get_copy_ctor (type, tf_warning_or_error); |
ac177431 JM |
4179 | |
4180 | if (t && !trivial_fn_p (t)) | |
4181 | TREE_VEC_ELT (info, 0) = t; | |
a68ab351 JJ |
4182 | } |
4183 | ||
acf0174b | 4184 | if (need_dtor && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)) |
4577f730 | 4185 | TREE_VEC_ELT (info, 1) = get_dtor (type, tf_warning_or_error); |
a68ab351 | 4186 | |
ac177431 | 4187 | if (need_copy_assignment) |
a68ab351 | 4188 | { |
ac177431 JM |
4189 | t = get_copy_assign (type); |
4190 | ||
4191 | if (t && !trivial_fn_p (t)) | |
4192 | TREE_VEC_ELT (info, 2) = t; | |
a68ab351 JJ |
4193 | } |
4194 | ||
4195 | return errorcount != save_errorcount; | |
4196 | } | |
4197 | ||
acf0174b JJ |
4198 | /* Helper function for handle_omp_array_sections. Called recursively |
4199 | to handle multiple array-section-subscripts. C is the clause, | |
4200 | T current expression (initially OMP_CLAUSE_DECL), which is either | |
4201 | a TREE_LIST for array-section-subscript (TREE_PURPOSE is low-bound | |
4202 | expression if specified, TREE_VALUE length expression if specified, | |
4203 | TREE_CHAIN is what it has been specified after, or some decl. | |
4204 | TYPES vector is populated with array section types, MAYBE_ZERO_LEN | |
4205 | set to true if any of the array-section-subscript could have length | |
4206 | of zero (explicit or implicit), FIRST_NON_ONE is the index of the | |
4207 | first array-section-subscript which is known not to have length | |
4208 | of one. Given say: | |
4209 | map(a[:b][2:1][:c][:2][:d][e:f][2:5]) | |
4210 | FIRST_NON_ONE will be 3, array-section-subscript [:b], [2:1] and [:c] | |
4211 | all are or may have length of 1, array-section-subscript [:2] is the | |
4212 | first one knonwn not to have length 1. For array-section-subscript | |
4213 | <= FIRST_NON_ONE we diagnose non-contiguous arrays if low bound isn't | |
4214 | 0 or length isn't the array domain max + 1, for > FIRST_NON_ONE we | |
4215 | can if MAYBE_ZERO_LEN is false. MAYBE_ZERO_LEN will be true in the above | |
4216 | case though, as some lengths could be zero. */ | |
4217 | ||
4218 | static tree | |
4219 | handle_omp_array_sections_1 (tree c, tree t, vec<tree> &types, | |
4220 | bool &maybe_zero_len, unsigned int &first_non_one) | |
4221 | { | |
4222 | tree ret, low_bound, length, type; | |
4223 | if (TREE_CODE (t) != TREE_LIST) | |
4224 | { | |
4225 | if (error_operand_p (t)) | |
4226 | return error_mark_node; | |
4227 | if (type_dependent_expression_p (t)) | |
4228 | return NULL_TREE; | |
4229 | if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
4230 | { | |
4231 | if (processing_template_decl) | |
4232 | return NULL_TREE; | |
4233 | if (DECL_P (t)) | |
4234 | error_at (OMP_CLAUSE_LOCATION (c), | |
4235 | "%qD is not a variable in %qs clause", t, | |
4236 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4237 | else | |
4238 | error_at (OMP_CLAUSE_LOCATION (c), | |
4239 | "%qE is not a variable in %qs clause", t, | |
4240 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4241 | return error_mark_node; | |
4242 | } | |
4243 | else if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND | |
4244 | && TREE_CODE (t) == VAR_DECL && DECL_THREAD_LOCAL_P (t)) | |
4245 | { | |
4246 | error_at (OMP_CLAUSE_LOCATION (c), | |
4247 | "%qD is threadprivate variable in %qs clause", t, | |
4248 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4249 | return error_mark_node; | |
4250 | } | |
4251 | t = convert_from_reference (t); | |
4252 | return t; | |
4253 | } | |
4254 | ||
4255 | ret = handle_omp_array_sections_1 (c, TREE_CHAIN (t), types, | |
4256 | maybe_zero_len, first_non_one); | |
4257 | if (ret == error_mark_node || ret == NULL_TREE) | |
4258 | return ret; | |
4259 | ||
4260 | type = TREE_TYPE (ret); | |
4261 | low_bound = TREE_PURPOSE (t); | |
4262 | length = TREE_VALUE (t); | |
4263 | if ((low_bound && type_dependent_expression_p (low_bound)) | |
4264 | || (length && type_dependent_expression_p (length))) | |
4265 | return NULL_TREE; | |
4266 | ||
4267 | if (low_bound == error_mark_node || length == error_mark_node) | |
4268 | return error_mark_node; | |
4269 | ||
4270 | if (low_bound && !INTEGRAL_TYPE_P (TREE_TYPE (low_bound))) | |
4271 | { | |
4272 | error_at (OMP_CLAUSE_LOCATION (c), | |
4273 | "low bound %qE of array section does not have integral type", | |
4274 | low_bound); | |
4275 | return error_mark_node; | |
4276 | } | |
4277 | if (length && !INTEGRAL_TYPE_P (TREE_TYPE (length))) | |
4278 | { | |
4279 | error_at (OMP_CLAUSE_LOCATION (c), | |
4280 | "length %qE of array section does not have integral type", | |
4281 | length); | |
4282 | return error_mark_node; | |
4283 | } | |
4284 | if (low_bound | |
4285 | && TREE_CODE (low_bound) == INTEGER_CST | |
4286 | && TYPE_PRECISION (TREE_TYPE (low_bound)) | |
4287 | > TYPE_PRECISION (sizetype)) | |
4288 | low_bound = fold_convert (sizetype, low_bound); | |
4289 | if (length | |
4290 | && TREE_CODE (length) == INTEGER_CST | |
4291 | && TYPE_PRECISION (TREE_TYPE (length)) | |
4292 | > TYPE_PRECISION (sizetype)) | |
4293 | length = fold_convert (sizetype, length); | |
4294 | if (low_bound == NULL_TREE) | |
4295 | low_bound = integer_zero_node; | |
4296 | ||
4297 | if (length != NULL_TREE) | |
4298 | { | |
4299 | if (!integer_nonzerop (length)) | |
4300 | maybe_zero_len = true; | |
4301 | if (first_non_one == types.length () | |
4302 | && (TREE_CODE (length) != INTEGER_CST || integer_onep (length))) | |
4303 | first_non_one++; | |
4304 | } | |
4305 | if (TREE_CODE (type) == ARRAY_TYPE) | |
4306 | { | |
4307 | if (length == NULL_TREE | |
4308 | && (TYPE_DOMAIN (type) == NULL_TREE | |
4309 | || TYPE_MAX_VALUE (TYPE_DOMAIN (type)) == NULL_TREE)) | |
4310 | { | |
4311 | error_at (OMP_CLAUSE_LOCATION (c), | |
4312 | "for unknown bound array type length expression must " | |
4313 | "be specified"); | |
4314 | return error_mark_node; | |
4315 | } | |
4316 | if (TREE_CODE (low_bound) == INTEGER_CST | |
4317 | && tree_int_cst_sgn (low_bound) == -1) | |
4318 | { | |
4319 | error_at (OMP_CLAUSE_LOCATION (c), | |
4320 | "negative low bound in array section in %qs clause", | |
4321 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4322 | return error_mark_node; | |
4323 | } | |
4324 | if (length != NULL_TREE | |
4325 | && TREE_CODE (length) == INTEGER_CST | |
4326 | && tree_int_cst_sgn (length) == -1) | |
4327 | { | |
4328 | error_at (OMP_CLAUSE_LOCATION (c), | |
4329 | "negative length in array section in %qs clause", | |
4330 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4331 | return error_mark_node; | |
4332 | } | |
4333 | if (TYPE_DOMAIN (type) | |
4334 | && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) | |
4335 | && TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) | |
4336 | == INTEGER_CST) | |
4337 | { | |
4338 | tree size = size_binop (PLUS_EXPR, | |
4339 | TYPE_MAX_VALUE (TYPE_DOMAIN (type)), | |
4340 | size_one_node); | |
4341 | if (TREE_CODE (low_bound) == INTEGER_CST) | |
4342 | { | |
4343 | if (tree_int_cst_lt (size, low_bound)) | |
4344 | { | |
4345 | error_at (OMP_CLAUSE_LOCATION (c), | |
4346 | "low bound %qE above array section size " | |
4347 | "in %qs clause", low_bound, | |
4348 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4349 | return error_mark_node; | |
4350 | } | |
4351 | if (tree_int_cst_equal (size, low_bound)) | |
4352 | maybe_zero_len = true; | |
4353 | else if (length == NULL_TREE | |
4354 | && first_non_one == types.length () | |
4355 | && tree_int_cst_equal | |
4356 | (TYPE_MAX_VALUE (TYPE_DOMAIN (type)), | |
4357 | low_bound)) | |
4358 | first_non_one++; | |
4359 | } | |
4360 | else if (length == NULL_TREE) | |
4361 | { | |
4362 | maybe_zero_len = true; | |
4363 | if (first_non_one == types.length ()) | |
4364 | first_non_one++; | |
4365 | } | |
4366 | if (length && TREE_CODE (length) == INTEGER_CST) | |
4367 | { | |
4368 | if (tree_int_cst_lt (size, length)) | |
4369 | { | |
4370 | error_at (OMP_CLAUSE_LOCATION (c), | |
4371 | "length %qE above array section size " | |
4372 | "in %qs clause", length, | |
4373 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4374 | return error_mark_node; | |
4375 | } | |
4376 | if (TREE_CODE (low_bound) == INTEGER_CST) | |
4377 | { | |
4378 | tree lbpluslen | |
4379 | = size_binop (PLUS_EXPR, | |
4380 | fold_convert (sizetype, low_bound), | |
4381 | fold_convert (sizetype, length)); | |
4382 | if (TREE_CODE (lbpluslen) == INTEGER_CST | |
4383 | && tree_int_cst_lt (size, lbpluslen)) | |
4384 | { | |
4385 | error_at (OMP_CLAUSE_LOCATION (c), | |
4386 | "high bound %qE above array section size " | |
4387 | "in %qs clause", lbpluslen, | |
4388 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4389 | return error_mark_node; | |
4390 | } | |
4391 | } | |
4392 | } | |
4393 | } | |
4394 | else if (length == NULL_TREE) | |
4395 | { | |
4396 | maybe_zero_len = true; | |
4397 | if (first_non_one == types.length ()) | |
4398 | first_non_one++; | |
4399 | } | |
4400 | ||
4401 | /* For [lb:] we will need to evaluate lb more than once. */ | |
4402 | if (length == NULL_TREE && OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND) | |
4403 | { | |
4404 | tree lb = cp_save_expr (low_bound); | |
4405 | if (lb != low_bound) | |
4406 | { | |
4407 | TREE_PURPOSE (t) = lb; | |
4408 | low_bound = lb; | |
4409 | } | |
4410 | } | |
4411 | } | |
4412 | else if (TREE_CODE (type) == POINTER_TYPE) | |
4413 | { | |
4414 | if (length == NULL_TREE) | |
4415 | { | |
4416 | error_at (OMP_CLAUSE_LOCATION (c), | |
4417 | "for pointer type length expression must be specified"); | |
4418 | return error_mark_node; | |
4419 | } | |
4420 | /* If there is a pointer type anywhere but in the very first | |
4421 | array-section-subscript, the array section can't be contiguous. */ | |
4422 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND | |
4423 | && TREE_CODE (TREE_CHAIN (t)) == TREE_LIST) | |
4424 | { | |
4425 | error_at (OMP_CLAUSE_LOCATION (c), | |
4426 | "array section is not contiguous in %qs clause", | |
4427 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
4428 | return error_mark_node; | |
4429 | } | |
4430 | } | |
4431 | else | |
4432 | { | |
4433 | error_at (OMP_CLAUSE_LOCATION (c), | |
4434 | "%qE does not have pointer or array type", ret); | |
4435 | return error_mark_node; | |
4436 | } | |
4437 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_DEPEND) | |
4438 | types.safe_push (TREE_TYPE (ret)); | |
4439 | /* We will need to evaluate lb more than once. */ | |
4440 | tree lb = cp_save_expr (low_bound); | |
4441 | if (lb != low_bound) | |
4442 | { | |
4443 | TREE_PURPOSE (t) = lb; | |
4444 | low_bound = lb; | |
4445 | } | |
4446 | ret = grok_array_decl (OMP_CLAUSE_LOCATION (c), ret, low_bound, false); | |
4447 | return ret; | |
4448 | } | |
4449 | ||
4450 | /* Handle array sections for clause C. */ | |
4451 | ||
4452 | static bool | |
4453 | handle_omp_array_sections (tree c) | |
4454 | { | |
4455 | bool maybe_zero_len = false; | |
4456 | unsigned int first_non_one = 0; | |
ef062b13 | 4457 | auto_vec<tree> types; |
acf0174b JJ |
4458 | tree first = handle_omp_array_sections_1 (c, OMP_CLAUSE_DECL (c), types, |
4459 | maybe_zero_len, first_non_one); | |
4460 | if (first == error_mark_node) | |
ef062b13 | 4461 | return true; |
acf0174b | 4462 | if (first == NULL_TREE) |
ef062b13 | 4463 | return false; |
acf0174b JJ |
4464 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_DEPEND) |
4465 | { | |
4466 | tree t = OMP_CLAUSE_DECL (c); | |
4467 | tree tem = NULL_TREE; | |
acf0174b JJ |
4468 | if (processing_template_decl) |
4469 | return false; | |
4470 | /* Need to evaluate side effects in the length expressions | |
4471 | if any. */ | |
4472 | while (TREE_CODE (t) == TREE_LIST) | |
4473 | { | |
4474 | if (TREE_VALUE (t) && TREE_SIDE_EFFECTS (TREE_VALUE (t))) | |
4475 | { | |
4476 | if (tem == NULL_TREE) | |
4477 | tem = TREE_VALUE (t); | |
4478 | else | |
4479 | tem = build2 (COMPOUND_EXPR, TREE_TYPE (tem), | |
4480 | TREE_VALUE (t), tem); | |
4481 | } | |
4482 | t = TREE_CHAIN (t); | |
4483 | } | |
4484 | if (tem) | |
4485 | first = build2 (COMPOUND_EXPR, TREE_TYPE (first), tem, first); | |
4486 | OMP_CLAUSE_DECL (c) = first; | |
4487 | } | |
4488 | else | |
4489 | { | |
4490 | unsigned int num = types.length (), i; | |
4491 | tree t, side_effects = NULL_TREE, size = NULL_TREE; | |
4492 | tree condition = NULL_TREE; | |
4493 | ||
4494 | if (int_size_in_bytes (TREE_TYPE (first)) <= 0) | |
4495 | maybe_zero_len = true; | |
4496 | if (processing_template_decl && maybe_zero_len) | |
ef062b13 | 4497 | return false; |
acf0174b JJ |
4498 | |
4499 | for (i = num, t = OMP_CLAUSE_DECL (c); i > 0; | |
4500 | t = TREE_CHAIN (t)) | |
4501 | { | |
4502 | tree low_bound = TREE_PURPOSE (t); | |
4503 | tree length = TREE_VALUE (t); | |
4504 | ||
4505 | i--; | |
4506 | if (low_bound | |
4507 | && TREE_CODE (low_bound) == INTEGER_CST | |
4508 | && TYPE_PRECISION (TREE_TYPE (low_bound)) | |
4509 | > TYPE_PRECISION (sizetype)) | |
4510 | low_bound = fold_convert (sizetype, low_bound); | |
4511 | if (length | |
4512 | && TREE_CODE (length) == INTEGER_CST | |
4513 | && TYPE_PRECISION (TREE_TYPE (length)) | |
4514 | > TYPE_PRECISION (sizetype)) | |
4515 | length = fold_convert (sizetype, length); | |
4516 | if (low_bound == NULL_TREE) | |
4517 | low_bound = integer_zero_node; | |
4518 | if (!maybe_zero_len && i > first_non_one) | |
4519 | { | |
4520 | if (integer_nonzerop (low_bound)) | |
4521 | goto do_warn_noncontiguous; | |
4522 | if (length != NULL_TREE | |
4523 | && TREE_CODE (length) == INTEGER_CST | |
4524 | && TYPE_DOMAIN (types[i]) | |
4525 | && TYPE_MAX_VALUE (TYPE_DOMAIN (types[i])) | |
4526 | && TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (types[i]))) | |
4527 | == INTEGER_CST) | |
4528 | { | |
4529 | tree size; | |
4530 | size = size_binop (PLUS_EXPR, | |
4531 | TYPE_MAX_VALUE (TYPE_DOMAIN (types[i])), | |
4532 | size_one_node); | |
4533 | if (!tree_int_cst_equal (length, size)) | |
4534 | { | |
4535 | do_warn_noncontiguous: | |
4536 | error_at (OMP_CLAUSE_LOCATION (c), | |
4537 | "array section is not contiguous in %qs " | |
4538 | "clause", | |
4539 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
acf0174b JJ |
4540 | return true; |
4541 | } | |
4542 | } | |
4543 | if (!processing_template_decl | |
4544 | && length != NULL_TREE | |
4545 | && TREE_SIDE_EFFECTS (length)) | |
4546 | { | |
4547 | if (side_effects == NULL_TREE) | |
4548 | side_effects = length; | |
4549 | else | |
4550 | side_effects = build2 (COMPOUND_EXPR, | |
4551 | TREE_TYPE (side_effects), | |
4552 | length, side_effects); | |
4553 | } | |
4554 | } | |
4555 | else if (processing_template_decl) | |
4556 | continue; | |
4557 | else | |
4558 | { | |
4559 | tree l; | |
4560 | ||
4561 | if (i > first_non_one && length && integer_nonzerop (length)) | |
4562 | continue; | |
4563 | if (length) | |
4564 | l = fold_convert (sizetype, length); | |
4565 | else | |
4566 | { | |
4567 | l = size_binop (PLUS_EXPR, | |
4568 | TYPE_MAX_VALUE (TYPE_DOMAIN (types[i])), | |
4569 | size_one_node); | |
4570 | l = size_binop (MINUS_EXPR, l, | |
4571 | fold_convert (sizetype, low_bound)); | |
4572 | } | |
4573 | if (i > first_non_one) | |
4574 | { | |
4575 | l = fold_build2 (NE_EXPR, boolean_type_node, l, | |
4576 | size_zero_node); | |
4577 | if (condition == NULL_TREE) | |
4578 | condition = l; | |
4579 | else | |
4580 | condition = fold_build2 (BIT_AND_EXPR, boolean_type_node, | |
4581 | l, condition); | |
4582 | } | |
4583 | else if (size == NULL_TREE) | |
4584 | { | |
4585 | size = size_in_bytes (TREE_TYPE (types[i])); | |
4586 | size = size_binop (MULT_EXPR, size, l); | |
4587 | if (condition) | |
4588 | size = fold_build3 (COND_EXPR, sizetype, condition, | |
4589 | size, size_zero_node); | |
4590 | } | |
4591 | else | |
4592 | size = size_binop (MULT_EXPR, size, l); | |
4593 | } | |
4594 | } | |
acf0174b JJ |
4595 | if (!processing_template_decl) |
4596 | { | |
4597 | if (side_effects) | |
4598 | size = build2 (COMPOUND_EXPR, sizetype, side_effects, size); | |
4599 | OMP_CLAUSE_DECL (c) = first; | |
4600 | OMP_CLAUSE_SIZE (c) = size; | |
4601 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_MAP) | |
4602 | return false; | |
4603 | tree c2 = build_omp_clause (OMP_CLAUSE_LOCATION (c), | |
4604 | OMP_CLAUSE_MAP); | |
4605 | OMP_CLAUSE_MAP_KIND (c2) = OMP_CLAUSE_MAP_POINTER; | |
4606 | if (!cxx_mark_addressable (t)) | |
4607 | return false; | |
4608 | OMP_CLAUSE_DECL (c2) = t; | |
4609 | t = build_fold_addr_expr (first); | |
4610 | t = fold_convert_loc (OMP_CLAUSE_LOCATION (c), | |
4611 | ptrdiff_type_node, t); | |
4612 | tree ptr = OMP_CLAUSE_DECL (c2); | |
4613 | ptr = convert_from_reference (ptr); | |
4614 | if (!POINTER_TYPE_P (TREE_TYPE (ptr))) | |
4615 | ptr = build_fold_addr_expr (ptr); | |
4616 | t = fold_build2_loc (OMP_CLAUSE_LOCATION (c), MINUS_EXPR, | |
4617 | ptrdiff_type_node, t, | |
4618 | fold_convert_loc (OMP_CLAUSE_LOCATION (c), | |
4619 | ptrdiff_type_node, ptr)); | |
4620 | OMP_CLAUSE_SIZE (c2) = t; | |
4621 | OMP_CLAUSE_CHAIN (c2) = OMP_CLAUSE_CHAIN (c); | |
4622 | OMP_CLAUSE_CHAIN (c) = c2; | |
4623 | ptr = OMP_CLAUSE_DECL (c2); | |
4624 | if (TREE_CODE (TREE_TYPE (ptr)) == REFERENCE_TYPE | |
4625 | && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (ptr)))) | |
4626 | { | |
4627 | tree c3 = build_omp_clause (OMP_CLAUSE_LOCATION (c), | |
4628 | OMP_CLAUSE_MAP); | |
4629 | OMP_CLAUSE_MAP_KIND (c3) = OMP_CLAUSE_MAP_POINTER; | |
4630 | OMP_CLAUSE_DECL (c3) = ptr; | |
4631 | OMP_CLAUSE_DECL (c2) = convert_from_reference (ptr); | |
4632 | OMP_CLAUSE_SIZE (c3) = size_zero_node; | |
4633 | OMP_CLAUSE_CHAIN (c3) = OMP_CLAUSE_CHAIN (c2); | |
4634 | OMP_CLAUSE_CHAIN (c2) = c3; | |
4635 | } | |
4636 | } | |
4637 | } | |
4638 | return false; | |
4639 | } | |
4640 | ||
4641 | /* Return identifier to look up for omp declare reduction. */ | |
4642 | ||
4643 | tree | |
4644 | omp_reduction_id (enum tree_code reduction_code, tree reduction_id, tree type) | |
4645 | { | |
4646 | const char *p = NULL; | |
4647 | const char *m = NULL; | |
4648 | switch (reduction_code) | |
4649 | { | |
4650 | case PLUS_EXPR: | |
4651 | case MULT_EXPR: | |
4652 | case MINUS_EXPR: | |
4653 | case BIT_AND_EXPR: | |
4654 | case BIT_XOR_EXPR: | |
4655 | case BIT_IOR_EXPR: | |
4656 | case TRUTH_ANDIF_EXPR: | |
4657 | case TRUTH_ORIF_EXPR: | |
4658 | reduction_id = ansi_opname (reduction_code); | |
4659 | break; | |
4660 | case MIN_EXPR: | |
4661 | p = "min"; | |
4662 | break; | |
4663 | case MAX_EXPR: | |
4664 | p = "max"; | |
4665 | break; | |
4666 | default: | |
4667 | break; | |
4668 | } | |
4669 | ||
4670 | if (p == NULL) | |
4671 | { | |
4672 | if (TREE_CODE (reduction_id) != IDENTIFIER_NODE) | |
4673 | return error_mark_node; | |
4674 | p = IDENTIFIER_POINTER (reduction_id); | |
4675 | } | |
4676 | ||
4677 | if (type != NULL_TREE) | |
4678 | m = mangle_type_string (TYPE_MAIN_VARIANT (type)); | |
4679 | ||
4680 | const char prefix[] = "omp declare reduction "; | |
4681 | size_t lenp = sizeof (prefix); | |
4682 | if (strncmp (p, prefix, lenp - 1) == 0) | |
4683 | lenp = 1; | |
4684 | size_t len = strlen (p); | |
4685 | size_t lenm = m ? strlen (m) + 1 : 0; | |
4686 | char *name = XALLOCAVEC (char, lenp + len + lenm); | |
4687 | if (lenp > 1) | |
4688 | memcpy (name, prefix, lenp - 1); | |
4689 | memcpy (name + lenp - 1, p, len + 1); | |
4690 | if (m) | |
4691 | { | |
4692 | name[lenp + len - 1] = '~'; | |
4693 | memcpy (name + lenp + len, m, lenm); | |
4694 | } | |
4695 | return get_identifier (name); | |
4696 | } | |
4697 | ||
4698 | /* Lookup OpenMP UDR ID for TYPE, return the corresponding artificial | |
4699 | FUNCTION_DECL or NULL_TREE if not found. */ | |
4700 | ||
4701 | static tree | |
4702 | omp_reduction_lookup (location_t loc, tree id, tree type, tree *baselinkp, | |
4703 | vec<tree> *ambiguousp) | |
4704 | { | |
4705 | tree orig_id = id; | |
4706 | tree baselink = NULL_TREE; | |
4707 | if (identifier_p (id)) | |
4708 | { | |
4709 | cp_id_kind idk; | |
4710 | bool nonint_cst_expression_p; | |
4711 | const char *error_msg; | |
4712 | id = omp_reduction_id (ERROR_MARK, id, type); | |
4713 | tree decl = lookup_name (id); | |
4714 | if (decl == NULL_TREE) | |
4715 | decl = error_mark_node; | |
4716 | id = finish_id_expression (id, decl, NULL_TREE, &idk, false, true, | |
4717 | &nonint_cst_expression_p, false, true, false, | |
4718 | false, &error_msg, loc); | |
4719 | if (idk == CP_ID_KIND_UNQUALIFIED | |
4720 | && identifier_p (id)) | |
4721 | { | |
4722 | vec<tree, va_gc> *args = NULL; | |
4723 | vec_safe_push (args, build_reference_type (type)); | |
cdc23b1b | 4724 | id = perform_koenig_lookup (id, args, tf_none); |
acf0174b JJ |
4725 | } |
4726 | } | |
4727 | else if (TREE_CODE (id) == SCOPE_REF) | |
4728 | id = lookup_qualified_name (TREE_OPERAND (id, 0), | |
4729 | omp_reduction_id (ERROR_MARK, | |
4730 | TREE_OPERAND (id, 1), | |
4731 | type), | |
4732 | false, false); | |
4733 | tree fns = id; | |
4734 | if (id && is_overloaded_fn (id)) | |
4735 | id = get_fns (id); | |
4736 | for (; id; id = OVL_NEXT (id)) | |
4737 | { | |
4738 | tree fndecl = OVL_CURRENT (id); | |
4739 | if (TREE_CODE (fndecl) == FUNCTION_DECL) | |
4740 | { | |
4741 | tree argtype = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (fndecl))); | |
4742 | if (same_type_p (TREE_TYPE (argtype), type)) | |
4743 | break; | |
4744 | } | |
4745 | } | |
4746 | if (id && BASELINK_P (fns)) | |
4747 | { | |
4748 | if (baselinkp) | |
4749 | *baselinkp = fns; | |
4750 | else | |
4751 | baselink = fns; | |
4752 | } | |
4753 | if (id == NULL_TREE && CLASS_TYPE_P (type) && TYPE_BINFO (type)) | |
4754 | { | |
4755 | vec<tree> ambiguous = vNULL; | |
4756 | tree binfo = TYPE_BINFO (type), base_binfo, ret = NULL_TREE; | |
4757 | unsigned int ix; | |
4758 | if (ambiguousp == NULL) | |
4759 | ambiguousp = &ambiguous; | |
4760 | for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++) | |
4761 | { | |
4762 | id = omp_reduction_lookup (loc, orig_id, BINFO_TYPE (base_binfo), | |
4763 | baselinkp ? baselinkp : &baselink, | |
4764 | ambiguousp); | |
4765 | if (id == NULL_TREE) | |
4766 | continue; | |
4767 | if (!ambiguousp->is_empty ()) | |
4768 | ambiguousp->safe_push (id); | |
4769 | else if (ret != NULL_TREE) | |
4770 | { | |
4771 | ambiguousp->safe_push (ret); | |
4772 | ambiguousp->safe_push (id); | |
4773 | ret = NULL_TREE; | |
4774 | } | |
4775 | else | |
4776 | ret = id; | |
4777 | } | |
4778 | if (ambiguousp != &ambiguous) | |
4779 | return ret; | |
4780 | if (!ambiguous.is_empty ()) | |
4781 | { | |
4782 | const char *str = _("candidates are:"); | |
4783 | unsigned int idx; | |
4784 | tree udr; | |
4785 | error_at (loc, "user defined reduction lookup is ambiguous"); | |
4786 | FOR_EACH_VEC_ELT (ambiguous, idx, udr) | |
4787 | { | |
4788 | inform (DECL_SOURCE_LOCATION (udr), "%s %#D", str, udr); | |
4789 | if (idx == 0) | |
4790 | str = get_spaces (str); | |
4791 | } | |
4792 | ambiguous.release (); | |
4793 | ret = error_mark_node; | |
4794 | baselink = NULL_TREE; | |
4795 | } | |
4796 | id = ret; | |
4797 | } | |
4798 | if (id && baselink) | |
4799 | perform_or_defer_access_check (BASELINK_BINFO (baselink), | |
4800 | id, id, tf_warning_or_error); | |
4801 | return id; | |
4802 | } | |
4803 | ||
4804 | /* Helper function for cp_parser_omp_declare_reduction_exprs | |
4805 | and tsubst_omp_udr. | |
4806 | Remove CLEANUP_STMT for data (omp_priv variable). | |
4807 | Also append INIT_EXPR for DECL_INITIAL of omp_priv after its | |
4808 | DECL_EXPR. */ | |
4809 | ||
4810 | tree | |
4811 | cp_remove_omp_priv_cleanup_stmt (tree *tp, int *walk_subtrees, void *data) | |
4812 | { | |
4813 | if (TYPE_P (*tp)) | |
4814 | *walk_subtrees = 0; | |
4815 | else if (TREE_CODE (*tp) == CLEANUP_STMT && CLEANUP_DECL (*tp) == (tree) data) | |
4816 | *tp = CLEANUP_BODY (*tp); | |
4817 | else if (TREE_CODE (*tp) == DECL_EXPR) | |
4818 | { | |
4819 | tree decl = DECL_EXPR_DECL (*tp); | |
4820 | if (!processing_template_decl | |
4821 | && decl == (tree) data | |
4822 | && DECL_INITIAL (decl) | |
4823 | && DECL_INITIAL (decl) != error_mark_node) | |
4824 | { | |
4825 | tree list = NULL_TREE; | |
4826 | append_to_statement_list_force (*tp, &list); | |
4827 | tree init_expr = build2 (INIT_EXPR, void_type_node, | |
4828 | decl, DECL_INITIAL (decl)); | |
4829 | DECL_INITIAL (decl) = NULL_TREE; | |
4830 | append_to_statement_list_force (init_expr, &list); | |
4831 | *tp = list; | |
4832 | } | |
4833 | } | |
4834 | return NULL_TREE; | |
4835 | } | |
4836 | ||
4837 | /* Data passed from cp_check_omp_declare_reduction to | |
4838 | cp_check_omp_declare_reduction_r. */ | |
4839 | ||
4840 | struct cp_check_omp_declare_reduction_data | |
4841 | { | |
4842 | location_t loc; | |
4843 | tree stmts[7]; | |
4844 | bool combiner_p; | |
4845 | }; | |
4846 | ||
4847 | /* Helper function for cp_check_omp_declare_reduction, called via | |
4848 | cp_walk_tree. */ | |
4849 | ||
4850 | static tree | |
4851 | cp_check_omp_declare_reduction_r (tree *tp, int *, void *data) | |
4852 | { | |
4853 | struct cp_check_omp_declare_reduction_data *udr_data | |
4854 | = (struct cp_check_omp_declare_reduction_data *) data; | |
4855 | if (SSA_VAR_P (*tp) | |
4856 | && !DECL_ARTIFICIAL (*tp) | |
4857 | && *tp != DECL_EXPR_DECL (udr_data->stmts[udr_data->combiner_p ? 0 : 3]) | |
4858 | && *tp != DECL_EXPR_DECL (udr_data->stmts[udr_data->combiner_p ? 1 : 4])) | |
4859 | { | |
4860 | location_t loc = udr_data->loc; | |
4861 | if (udr_data->combiner_p) | |
4862 | error_at (loc, "%<#pragma omp declare reduction%> combiner refers to " | |
4863 | "variable %qD which is not %<omp_out%> nor %<omp_in%>", | |
4864 | *tp); | |
4865 | else | |
4866 | error_at (loc, "%<#pragma omp declare reduction%> initializer refers " | |
4867 | "to variable %qD which is not %<omp_priv%> nor " | |
4868 | "%<omp_orig%>", | |
4869 | *tp); | |
4870 | return *tp; | |
4871 | } | |
4872 | return NULL_TREE; | |
4873 | } | |
4874 | ||
4875 | /* Diagnose violation of OpenMP #pragma omp declare reduction restrictions. */ | |
4876 | ||
4877 | void | |
4878 | cp_check_omp_declare_reduction (tree udr) | |
4879 | { | |
4880 | tree type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (udr))); | |
4881 | gcc_assert (TREE_CODE (type) == REFERENCE_TYPE); | |
4882 | type = TREE_TYPE (type); | |
4883 | int i; | |
4884 | location_t loc = DECL_SOURCE_LOCATION (udr); | |
4885 | ||
4886 | if (type == error_mark_node) | |
4887 | return; | |
4888 | if (ARITHMETIC_TYPE_P (type)) | |
4889 | { | |
4890 | static enum tree_code predef_codes[] | |
4891 | = { PLUS_EXPR, MULT_EXPR, MINUS_EXPR, BIT_AND_EXPR, BIT_XOR_EXPR, | |
4892 | BIT_IOR_EXPR, TRUTH_ANDIF_EXPR, TRUTH_ORIF_EXPR }; | |
4893 | for (i = 0; i < 8; i++) | |
4894 | { | |
4895 | tree id = omp_reduction_id (predef_codes[i], NULL_TREE, NULL_TREE); | |
4896 | const char *n1 = IDENTIFIER_POINTER (DECL_NAME (udr)); | |
4897 | const char *n2 = IDENTIFIER_POINTER (id); | |
4898 | if (strncmp (n1, n2, IDENTIFIER_LENGTH (id)) == 0 | |
4899 | && (n1[IDENTIFIER_LENGTH (id)] == '~' | |
4900 | || n1[IDENTIFIER_LENGTH (id)] == '\0')) | |
4901 | break; | |
4902 | } | |
4903 | ||
4904 | if (i == 8 | |
4905 | && TREE_CODE (type) != COMPLEX_EXPR) | |
4906 | { | |
4907 | const char prefix_minmax[] = "omp declare reduction m"; | |
4908 | size_t prefix_size = sizeof (prefix_minmax) - 1; | |
4909 | const char *n = IDENTIFIER_POINTER (DECL_NAME (udr)); | |
4910 | if (strncmp (IDENTIFIER_POINTER (DECL_NAME (udr)), | |
4911 | prefix_minmax, prefix_size) == 0 | |
4912 | && ((n[prefix_size] == 'i' && n[prefix_size + 1] == 'n') | |
4913 | || (n[prefix_size] == 'a' && n[prefix_size + 1] == 'x')) | |
4914 | && (n[prefix_size + 2] == '~' || n[prefix_size + 2] == '\0')) | |
4915 | i = 0; | |
4916 | } | |
4917 | if (i < 8) | |
4918 | { | |
4919 | error_at (loc, "predeclared arithmetic type %qT in " | |
4920 | "%<#pragma omp declare reduction%>", type); | |
4921 | return; | |
4922 | } | |
4923 | } | |
4924 | else if (TREE_CODE (type) == FUNCTION_TYPE | |
4925 | || TREE_CODE (type) == METHOD_TYPE | |
4926 | || TREE_CODE (type) == ARRAY_TYPE) | |
4927 | { | |
4928 | error_at (loc, "function or array type %qT in " | |
4929 | "%<#pragma omp declare reduction%>", type); | |
4930 | return; | |
4931 | } | |
4932 | else if (TREE_CODE (type) == REFERENCE_TYPE) | |
4933 | { | |
4934 | error_at (loc, "reference type %qT in %<#pragma omp declare reduction%>", | |
4935 | type); | |
4936 | return; | |
4937 | } | |
4938 | else if (TYPE_QUALS_NO_ADDR_SPACE (type)) | |
4939 | { | |
4940 | error_at (loc, "const, volatile or __restrict qualified type %qT in " | |
4941 | "%<#pragma omp declare reduction%>", type); | |
4942 | return; | |
4943 | } | |
4944 | ||
4945 | tree body = DECL_SAVED_TREE (udr); | |
4946 | if (body == NULL_TREE || TREE_CODE (body) != STATEMENT_LIST) | |
4947 | return; | |
4948 | ||
4949 | tree_stmt_iterator tsi; | |
4950 | struct cp_check_omp_declare_reduction_data data; | |
4951 | memset (data.stmts, 0, sizeof data.stmts); | |
4952 | for (i = 0, tsi = tsi_start (body); | |
4953 | i < 7 && !tsi_end_p (tsi); | |
4954 | i++, tsi_next (&tsi)) | |
4955 | data.stmts[i] = tsi_stmt (tsi); | |
4956 | data.loc = loc; | |
4957 | gcc_assert (tsi_end_p (tsi)); | |
4958 | if (i >= 3) | |
4959 | { | |
4960 | gcc_assert (TREE_CODE (data.stmts[0]) == DECL_EXPR | |
4961 | && TREE_CODE (data.stmts[1]) == DECL_EXPR); | |
4962 | if (TREE_NO_WARNING (DECL_EXPR_DECL (data.stmts[0]))) | |
4963 | return; | |
4964 | data.combiner_p = true; | |
4965 | if (cp_walk_tree (&data.stmts[2], cp_check_omp_declare_reduction_r, | |
4966 | &data, NULL)) | |
4967 | TREE_NO_WARNING (DECL_EXPR_DECL (data.stmts[0])) = 1; | |
4968 | } | |
4969 | if (i >= 6) | |
4970 | { | |
4971 | gcc_assert (TREE_CODE (data.stmts[3]) == DECL_EXPR | |
4972 | && TREE_CODE (data.stmts[4]) == DECL_EXPR); | |
4973 | data.combiner_p = false; | |
4974 | if (cp_walk_tree (&data.stmts[5], cp_check_omp_declare_reduction_r, | |
4975 | &data, NULL) | |
4976 | || cp_walk_tree (&DECL_INITIAL (DECL_EXPR_DECL (data.stmts[3])), | |
4977 | cp_check_omp_declare_reduction_r, &data, NULL)) | |
4978 | TREE_NO_WARNING (DECL_EXPR_DECL (data.stmts[0])) = 1; | |
4979 | if (i == 7) | |
4980 | gcc_assert (TREE_CODE (data.stmts[6]) == DECL_EXPR); | |
4981 | } | |
4982 | } | |
4983 | ||
4984 | /* Helper function of finish_omp_clauses. Clone STMT as if we were making | |
4985 | an inline call. But, remap | |
4986 | the OMP_DECL1 VAR_DECL (omp_out resp. omp_orig) to PLACEHOLDER | |
4987 | and OMP_DECL2 VAR_DECL (omp_in resp. omp_priv) to DECL. */ | |
4988 | ||
4989 | static tree | |
4990 | clone_omp_udr (tree stmt, tree omp_decl1, tree omp_decl2, | |
4991 | tree decl, tree placeholder) | |
4992 | { | |
4993 | copy_body_data id; | |
b787e7a2 | 4994 | hash_map<tree, tree> decl_map; |
acf0174b | 4995 | |
b787e7a2 TS |
4996 | decl_map.put (omp_decl1, placeholder); |
4997 | decl_map.put (omp_decl2, decl); | |
acf0174b JJ |
4998 | memset (&id, 0, sizeof (id)); |
4999 | id.src_fn = DECL_CONTEXT (omp_decl1); | |
5000 | id.dst_fn = current_function_decl; | |
5001 | id.src_cfun = DECL_STRUCT_FUNCTION (id.src_fn); | |
b787e7a2 | 5002 | id.decl_map = &decl_map; |
acf0174b JJ |
5003 | |
5004 | id.copy_decl = copy_decl_no_change; | |
5005 | id.transform_call_graph_edges = CB_CGE_DUPLICATE; | |
5006 | id.transform_new_cfg = true; | |
5007 | id.transform_return_to_modify = false; | |
5008 | id.transform_lang_insert_block = NULL; | |
5009 | id.eh_lp_nr = 0; | |
5010 | walk_tree (&stmt, copy_tree_body_r, &id, NULL); | |
acf0174b JJ |
5011 | return stmt; |
5012 | } | |
5013 | ||
5014 | /* Helper function of finish_omp_clauses, called via cp_walk_tree. | |
5015 | Find OMP_CLAUSE_PLACEHOLDER (passed in DATA) in *TP. */ | |
5016 | ||
5017 | static tree | |
5018 | find_omp_placeholder_r (tree *tp, int *, void *data) | |
5019 | { | |
5020 | if (*tp == (tree) data) | |
5021 | return *tp; | |
5022 | return NULL_TREE; | |
5023 | } | |
5024 | ||
5025 | /* Helper function of finish_omp_clauses. Handle OMP_CLAUSE_REDUCTION C. | |
5026 | Return true if there is some error and the clause should be removed. */ | |
5027 | ||
5028 | static bool | |
5029 | finish_omp_reduction_clause (tree c, bool *need_default_ctor, bool *need_dtor) | |
5030 | { | |
5031 | tree t = OMP_CLAUSE_DECL (c); | |
5032 | bool predefined = false; | |
5033 | tree type = TREE_TYPE (t); | |
5034 | if (TREE_CODE (type) == REFERENCE_TYPE) | |
5035 | type = TREE_TYPE (type); | |
4ca56230 PC |
5036 | if (type == error_mark_node) |
5037 | return true; | |
5038 | else if (ARITHMETIC_TYPE_P (type)) | |
acf0174b JJ |
5039 | switch (OMP_CLAUSE_REDUCTION_CODE (c)) |
5040 | { | |
5041 | case PLUS_EXPR: | |
5042 | case MULT_EXPR: | |
5043 | case MINUS_EXPR: | |
5044 | predefined = true; | |
5045 | break; | |
5046 | case MIN_EXPR: | |
5047 | case MAX_EXPR: | |
5048 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
5049 | break; | |
5050 | predefined = true; | |
5051 | break; | |
5052 | case BIT_AND_EXPR: | |
5053 | case BIT_IOR_EXPR: | |
5054 | case BIT_XOR_EXPR: | |
652fea39 JJ |
5055 | if (FLOAT_TYPE_P (type) || TREE_CODE (type) == COMPLEX_TYPE) |
5056 | break; | |
5057 | predefined = true; | |
5058 | break; | |
acf0174b JJ |
5059 | case TRUTH_ANDIF_EXPR: |
5060 | case TRUTH_ORIF_EXPR: | |
5061 | if (FLOAT_TYPE_P (type)) | |
5062 | break; | |
5063 | predefined = true; | |
5064 | break; | |
5065 | default: | |
5066 | break; | |
5067 | } | |
5068 | else if (TREE_CODE (type) == ARRAY_TYPE || TYPE_READONLY (type)) | |
5069 | { | |
5070 | error ("%qE has invalid type for %<reduction%>", t); | |
5071 | return true; | |
5072 | } | |
5073 | else if (!processing_template_decl) | |
5074 | { | |
5075 | t = require_complete_type (t); | |
5076 | if (t == error_mark_node) | |
5077 | return true; | |
5078 | OMP_CLAUSE_DECL (c) = t; | |
5079 | } | |
5080 | ||
5081 | if (predefined) | |
5082 | { | |
5083 | OMP_CLAUSE_REDUCTION_PLACEHOLDER (c) = NULL_TREE; | |
5084 | return false; | |
5085 | } | |
5086 | else if (processing_template_decl) | |
5087 | return false; | |
5088 | ||
5089 | tree id = OMP_CLAUSE_REDUCTION_PLACEHOLDER (c); | |
5090 | ||
5091 | type = TYPE_MAIN_VARIANT (TREE_TYPE (t)); | |
5092 | if (TREE_CODE (type) == REFERENCE_TYPE) | |
5093 | type = TREE_TYPE (type); | |
5094 | OMP_CLAUSE_REDUCTION_PLACEHOLDER (c) = NULL_TREE; | |
5095 | if (id == NULL_TREE) | |
5096 | id = omp_reduction_id (OMP_CLAUSE_REDUCTION_CODE (c), | |
5097 | NULL_TREE, NULL_TREE); | |
5098 | id = omp_reduction_lookup (OMP_CLAUSE_LOCATION (c), id, type, NULL, NULL); | |
5099 | if (id) | |
5100 | { | |
5101 | if (id == error_mark_node) | |
5102 | return true; | |
5103 | id = OVL_CURRENT (id); | |
5104 | mark_used (id); | |
5105 | tree body = DECL_SAVED_TREE (id); | |
5106 | if (TREE_CODE (body) == STATEMENT_LIST) | |
5107 | { | |
5108 | tree_stmt_iterator tsi; | |
5109 | tree placeholder = NULL_TREE; | |
5110 | int i; | |
5111 | tree stmts[7]; | |
5112 | tree atype = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (id))); | |
5113 | atype = TREE_TYPE (atype); | |
5114 | bool need_static_cast = !same_type_p (type, atype); | |
5115 | memset (stmts, 0, sizeof stmts); | |
5116 | for (i = 0, tsi = tsi_start (body); | |
5117 | i < 7 && !tsi_end_p (tsi); | |
5118 | i++, tsi_next (&tsi)) | |
5119 | stmts[i] = tsi_stmt (tsi); | |
5120 | gcc_assert (tsi_end_p (tsi)); | |
5121 | ||
5122 | if (i >= 3) | |
5123 | { | |
5124 | gcc_assert (TREE_CODE (stmts[0]) == DECL_EXPR | |
5125 | && TREE_CODE (stmts[1]) == DECL_EXPR); | |
5126 | placeholder = build_lang_decl (VAR_DECL, NULL_TREE, type); | |
5127 | DECL_ARTIFICIAL (placeholder) = 1; | |
5128 | DECL_IGNORED_P (placeholder) = 1; | |
5129 | OMP_CLAUSE_REDUCTION_PLACEHOLDER (c) = placeholder; | |
5130 | if (TREE_ADDRESSABLE (DECL_EXPR_DECL (stmts[0]))) | |
5131 | cxx_mark_addressable (placeholder); | |
5132 | if (TREE_ADDRESSABLE (DECL_EXPR_DECL (stmts[1])) | |
5133 | && TREE_CODE (TREE_TYPE (OMP_CLAUSE_DECL (c))) | |
5134 | != REFERENCE_TYPE) | |
5135 | cxx_mark_addressable (OMP_CLAUSE_DECL (c)); | |
5136 | tree omp_out = placeholder; | |
5137 | tree omp_in = convert_from_reference (OMP_CLAUSE_DECL (c)); | |
5138 | if (need_static_cast) | |
5139 | { | |
5140 | tree rtype = build_reference_type (atype); | |
5141 | omp_out = build_static_cast (rtype, omp_out, | |
5142 | tf_warning_or_error); | |
5143 | omp_in = build_static_cast (rtype, omp_in, | |
5144 | tf_warning_or_error); | |
5145 | if (omp_out == error_mark_node || omp_in == error_mark_node) | |
5146 | return true; | |
5147 | omp_out = convert_from_reference (omp_out); | |
5148 | omp_in = convert_from_reference (omp_in); | |
5149 | } | |
5150 | OMP_CLAUSE_REDUCTION_MERGE (c) | |
5151 | = clone_omp_udr (stmts[2], DECL_EXPR_DECL (stmts[0]), | |
5152 | DECL_EXPR_DECL (stmts[1]), omp_in, omp_out); | |
5153 | } | |
5154 | if (i >= 6) | |
5155 | { | |
5156 | gcc_assert (TREE_CODE (stmts[3]) == DECL_EXPR | |
5157 | && TREE_CODE (stmts[4]) == DECL_EXPR); | |
5158 | if (TREE_ADDRESSABLE (DECL_EXPR_DECL (stmts[3]))) | |
5159 | cxx_mark_addressable (OMP_CLAUSE_DECL (c)); | |
5160 | if (TREE_ADDRESSABLE (DECL_EXPR_DECL (stmts[4]))) | |
5161 | cxx_mark_addressable (placeholder); | |
5162 | tree omp_priv = convert_from_reference (OMP_CLAUSE_DECL (c)); | |
5163 | tree omp_orig = placeholder; | |
5164 | if (need_static_cast) | |
5165 | { | |
5166 | if (i == 7) | |
5167 | { | |
5168 | error_at (OMP_CLAUSE_LOCATION (c), | |
5169 | "user defined reduction with constructor " | |
5170 | "initializer for base class %qT", atype); | |
5171 | return true; | |
5172 | } | |
5173 | tree rtype = build_reference_type (atype); | |
5174 | omp_priv = build_static_cast (rtype, omp_priv, | |
5175 | tf_warning_or_error); | |
5176 | omp_orig = build_static_cast (rtype, omp_orig, | |
5177 | tf_warning_or_error); | |
5178 | if (omp_priv == error_mark_node | |
5179 | || omp_orig == error_mark_node) | |
5180 | return true; | |
5181 | omp_priv = convert_from_reference (omp_priv); | |
5182 | omp_orig = convert_from_reference (omp_orig); | |
5183 | } | |
5184 | if (i == 6) | |
5185 | *need_default_ctor = true; | |
5186 | OMP_CLAUSE_REDUCTION_INIT (c) | |
5187 | = clone_omp_udr (stmts[5], DECL_EXPR_DECL (stmts[4]), | |
5188 | DECL_EXPR_DECL (stmts[3]), | |
5189 | omp_priv, omp_orig); | |
5190 | if (cp_walk_tree (&OMP_CLAUSE_REDUCTION_INIT (c), | |
5191 | find_omp_placeholder_r, placeholder, NULL)) | |
5192 | OMP_CLAUSE_REDUCTION_OMP_ORIG_REF (c) = 1; | |
5193 | } | |
5194 | else if (i >= 3) | |
5195 | { | |
5196 | if (CLASS_TYPE_P (type) && !pod_type_p (type)) | |
5197 | *need_default_ctor = true; | |
5198 | else | |
5199 | { | |
5200 | tree init; | |
5201 | tree v = convert_from_reference (t); | |
5202 | if (AGGREGATE_TYPE_P (TREE_TYPE (v))) | |
5203 | init = build_constructor (TREE_TYPE (v), NULL); | |
5204 | else | |
5205 | init = fold_convert (TREE_TYPE (v), integer_zero_node); | |
5206 | OMP_CLAUSE_REDUCTION_INIT (c) | |
5207 | = build2 (INIT_EXPR, TREE_TYPE (v), v, init); | |
5208 | } | |
5209 | } | |
5210 | } | |
5211 | } | |
5212 | if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (c)) | |
5213 | *need_dtor = true; | |
5214 | else | |
5215 | { | |
5216 | error ("user defined reduction not found for %qD", t); | |
5217 | return true; | |
5218 | } | |
5219 | return false; | |
5220 | } | |
5221 | ||
1799e5d5 RH |
5222 | /* For all elements of CLAUSES, validate them vs OpenMP constraints. |
5223 | Remove any elements from the list that are invalid. */ | |
5224 | ||
5225 | tree | |
5226 | finish_omp_clauses (tree clauses) | |
5227 | { | |
5228 | bitmap_head generic_head, firstprivate_head, lastprivate_head; | |
acf0174b | 5229 | bitmap_head aligned_head; |
f3316c6d | 5230 | tree c, t, *pc; |
acf0174b JJ |
5231 | bool branch_seen = false; |
5232 | bool copyprivate_seen = false; | |
1799e5d5 RH |
5233 | |
5234 | bitmap_obstack_initialize (NULL); | |
5235 | bitmap_initialize (&generic_head, &bitmap_default_obstack); | |
5236 | bitmap_initialize (&firstprivate_head, &bitmap_default_obstack); | |
5237 | bitmap_initialize (&lastprivate_head, &bitmap_default_obstack); | |
acf0174b | 5238 | bitmap_initialize (&aligned_head, &bitmap_default_obstack); |
1799e5d5 RH |
5239 | |
5240 | for (pc = &clauses, c = clauses; c ; c = *pc) | |
5241 | { | |
5242 | bool remove = false; | |
5243 | ||
5244 | switch (OMP_CLAUSE_CODE (c)) | |
5245 | { | |
5246 | case OMP_CLAUSE_SHARED: | |
1799e5d5 RH |
5247 | goto check_dup_generic; |
5248 | case OMP_CLAUSE_PRIVATE: | |
1799e5d5 RH |
5249 | goto check_dup_generic; |
5250 | case OMP_CLAUSE_REDUCTION: | |
1799e5d5 RH |
5251 | goto check_dup_generic; |
5252 | case OMP_CLAUSE_COPYPRIVATE: | |
acf0174b | 5253 | copyprivate_seen = true; |
1799e5d5 RH |
5254 | goto check_dup_generic; |
5255 | case OMP_CLAUSE_COPYIN: | |
acf0174b JJ |
5256 | goto check_dup_generic; |
5257 | case OMP_CLAUSE_LINEAR: | |
5258 | t = OMP_CLAUSE_DECL (c); | |
5259 | if (!type_dependent_expression_p (t) | |
5260 | && !INTEGRAL_TYPE_P (TREE_TYPE (t)) | |
5261 | && TREE_CODE (TREE_TYPE (t)) != POINTER_TYPE) | |
5262 | { | |
5263 | error ("linear clause applied to non-integral non-pointer " | |
5264 | "variable with %qT type", TREE_TYPE (t)); | |
5265 | remove = true; | |
5266 | break; | |
5267 | } | |
5268 | t = OMP_CLAUSE_LINEAR_STEP (c); | |
5269 | if (t == NULL_TREE) | |
5270 | t = integer_one_node; | |
5271 | if (t == error_mark_node) | |
ee1d5a02 JJ |
5272 | { |
5273 | remove = true; | |
5274 | break; | |
5275 | } | |
acf0174b JJ |
5276 | else if (!type_dependent_expression_p (t) |
5277 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
5278 | { | |
5279 | error ("linear step expression must be integral"); | |
5280 | remove = true; | |
ee1d5a02 | 5281 | break; |
acf0174b JJ |
5282 | } |
5283 | else | |
5284 | { | |
5285 | t = mark_rvalue_use (t); | |
5286 | if (!processing_template_decl) | |
5287 | { | |
0136f8f0 AH |
5288 | if (TREE_CODE (OMP_CLAUSE_DECL (c)) == PARM_DECL) |
5289 | t = maybe_constant_value (t); | |
acf0174b JJ |
5290 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); |
5291 | if (TREE_CODE (TREE_TYPE (OMP_CLAUSE_DECL (c))) | |
5292 | == POINTER_TYPE) | |
5293 | { | |
5294 | t = pointer_int_sum (OMP_CLAUSE_LOCATION (c), PLUS_EXPR, | |
5295 | OMP_CLAUSE_DECL (c), t); | |
5296 | t = fold_build2_loc (OMP_CLAUSE_LOCATION (c), | |
5297 | MINUS_EXPR, sizetype, t, | |
5298 | OMP_CLAUSE_DECL (c)); | |
5299 | if (t == error_mark_node) | |
ee1d5a02 JJ |
5300 | { |
5301 | remove = true; | |
5302 | break; | |
5303 | } | |
acf0174b | 5304 | } |
da6f124d JJ |
5305 | else |
5306 | t = fold_convert (TREE_TYPE (OMP_CLAUSE_DECL (c)), t); | |
acf0174b JJ |
5307 | } |
5308 | OMP_CLAUSE_LINEAR_STEP (c) = t; | |
5309 | } | |
1799e5d5 RH |
5310 | goto check_dup_generic; |
5311 | check_dup_generic: | |
5312 | t = OMP_CLAUSE_DECL (c); | |
5a6ccc94 | 5313 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
1799e5d5 RH |
5314 | { |
5315 | if (processing_template_decl) | |
5316 | break; | |
76dc15d4 | 5317 | if (DECL_P (t)) |
acf0174b JJ |
5318 | error ("%qD is not a variable in clause %qs", t, |
5319 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
76dc15d4 | 5320 | else |
acf0174b JJ |
5321 | error ("%qE is not a variable in clause %qs", t, |
5322 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
1799e5d5 RH |
5323 | remove = true; |
5324 | } | |
5325 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
5326 | || bitmap_bit_p (&firstprivate_head, DECL_UID (t)) | |
5327 | || bitmap_bit_p (&lastprivate_head, DECL_UID (t))) | |
5328 | { | |
76dc15d4 | 5329 | error ("%qD appears more than once in data clauses", t); |
1799e5d5 RH |
5330 | remove = true; |
5331 | } | |
5332 | else | |
5333 | bitmap_set_bit (&generic_head, DECL_UID (t)); | |
5334 | break; | |
5335 | ||
5336 | case OMP_CLAUSE_FIRSTPRIVATE: | |
5337 | t = OMP_CLAUSE_DECL (c); | |
5a6ccc94 | 5338 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
1799e5d5 RH |
5339 | { |
5340 | if (processing_template_decl) | |
5341 | break; | |
85b20612 JJ |
5342 | if (DECL_P (t)) |
5343 | error ("%qD is not a variable in clause %<firstprivate%>", t); | |
5344 | else | |
5345 | error ("%qE is not a variable in clause %<firstprivate%>", t); | |
1799e5d5 RH |
5346 | remove = true; |
5347 | } | |
5348 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
5349 | || bitmap_bit_p (&firstprivate_head, DECL_UID (t))) | |
5350 | { | |
85b20612 | 5351 | error ("%qD appears more than once in data clauses", t); |
1799e5d5 RH |
5352 | remove = true; |
5353 | } | |
5354 | else | |
5355 | bitmap_set_bit (&firstprivate_head, DECL_UID (t)); | |
5356 | break; | |
5357 | ||
5358 | case OMP_CLAUSE_LASTPRIVATE: | |
5359 | t = OMP_CLAUSE_DECL (c); | |
5a6ccc94 | 5360 | if (!VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
1799e5d5 RH |
5361 | { |
5362 | if (processing_template_decl) | |
5363 | break; | |
85b20612 JJ |
5364 | if (DECL_P (t)) |
5365 | error ("%qD is not a variable in clause %<lastprivate%>", t); | |
5366 | else | |
5367 | error ("%qE is not a variable in clause %<lastprivate%>", t); | |
1799e5d5 RH |
5368 | remove = true; |
5369 | } | |
5370 | else if (bitmap_bit_p (&generic_head, DECL_UID (t)) | |
5371 | || bitmap_bit_p (&lastprivate_head, DECL_UID (t))) | |
5372 | { | |
85b20612 | 5373 | error ("%qD appears more than once in data clauses", t); |
1799e5d5 RH |
5374 | remove = true; |
5375 | } | |
5376 | else | |
5377 | bitmap_set_bit (&lastprivate_head, DECL_UID (t)); | |
5378 | break; | |
5379 | ||
5380 | case OMP_CLAUSE_IF: | |
5381 | t = OMP_CLAUSE_IF_EXPR (c); | |
5382 | t = maybe_convert_cond (t); | |
5383 | if (t == error_mark_node) | |
5384 | remove = true; | |
b848354b JJ |
5385 | else if (!processing_template_decl) |
5386 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
1799e5d5 RH |
5387 | OMP_CLAUSE_IF_EXPR (c) = t; |
5388 | break; | |
5389 | ||
20906c66 JJ |
5390 | case OMP_CLAUSE_FINAL: |
5391 | t = OMP_CLAUSE_FINAL_EXPR (c); | |
5392 | t = maybe_convert_cond (t); | |
5393 | if (t == error_mark_node) | |
5394 | remove = true; | |
b848354b JJ |
5395 | else if (!processing_template_decl) |
5396 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
20906c66 JJ |
5397 | OMP_CLAUSE_FINAL_EXPR (c) = t; |
5398 | break; | |
5399 | ||
1799e5d5 RH |
5400 | case OMP_CLAUSE_NUM_THREADS: |
5401 | t = OMP_CLAUSE_NUM_THREADS_EXPR (c); | |
5402 | if (t == error_mark_node) | |
5403 | remove = true; | |
6e684eee JJ |
5404 | else if (!type_dependent_expression_p (t) |
5405 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
1799e5d5 RH |
5406 | { |
5407 | error ("num_threads expression must be integral"); | |
5408 | remove = true; | |
5409 | } | |
7d1362bc | 5410 | else |
b848354b JJ |
5411 | { |
5412 | t = mark_rvalue_use (t); | |
5413 | if (!processing_template_decl) | |
5414 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
5415 | OMP_CLAUSE_NUM_THREADS_EXPR (c) = t; | |
5416 | } | |
1799e5d5 RH |
5417 | break; |
5418 | ||
5419 | case OMP_CLAUSE_SCHEDULE: | |
5420 | t = OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c); | |
5421 | if (t == NULL) | |
5422 | ; | |
5423 | else if (t == error_mark_node) | |
5424 | remove = true; | |
6e684eee JJ |
5425 | else if (!type_dependent_expression_p (t) |
5426 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
1799e5d5 RH |
5427 | { |
5428 | error ("schedule chunk size expression must be integral"); | |
5429 | remove = true; | |
5430 | } | |
7d1362bc | 5431 | else |
b848354b JJ |
5432 | { |
5433 | t = mark_rvalue_use (t); | |
5434 | if (!processing_template_decl) | |
5435 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
5436 | OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t; | |
5437 | } | |
1799e5d5 RH |
5438 | break; |
5439 | ||
acf0174b JJ |
5440 | case OMP_CLAUSE_SIMDLEN: |
5441 | case OMP_CLAUSE_SAFELEN: | |
5442 | t = OMP_CLAUSE_OPERAND (c, 0); | |
5443 | if (t == error_mark_node) | |
5444 | remove = true; | |
5445 | else if (!type_dependent_expression_p (t) | |
5446 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
5447 | { | |
5448 | error ("%qs length expression must be integral", | |
5449 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
5450 | remove = true; | |
5451 | } | |
5452 | else | |
5453 | { | |
5454 | t = mark_rvalue_use (t); | |
5455 | t = maybe_constant_value (t); | |
5456 | if (!processing_template_decl) | |
5457 | { | |
5458 | if (TREE_CODE (t) != INTEGER_CST | |
5459 | || tree_int_cst_sgn (t) != 1) | |
5460 | { | |
5461 | error ("%qs length expression must be positive constant" | |
5462 | " integer expression", | |
5463 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
5464 | remove = true; | |
5465 | } | |
5466 | } | |
5467 | OMP_CLAUSE_OPERAND (c, 0) = t; | |
5468 | } | |
5469 | break; | |
5470 | ||
5471 | case OMP_CLAUSE_NUM_TEAMS: | |
5472 | t = OMP_CLAUSE_NUM_TEAMS_EXPR (c); | |
5473 | if (t == error_mark_node) | |
5474 | remove = true; | |
5475 | else if (!type_dependent_expression_p (t) | |
5476 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
5477 | { | |
5478 | error ("%<num_teams%> expression must be integral"); | |
5479 | remove = true; | |
5480 | } | |
5481 | else | |
5482 | { | |
5483 | t = mark_rvalue_use (t); | |
5484 | if (!processing_template_decl) | |
5485 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
5486 | OMP_CLAUSE_NUM_TEAMS_EXPR (c) = t; | |
5487 | } | |
5488 | break; | |
5489 | ||
5490 | case OMP_CLAUSE_THREAD_LIMIT: | |
5491 | t = OMP_CLAUSE_THREAD_LIMIT_EXPR (c); | |
5492 | if (t == error_mark_node) | |
5493 | remove = true; | |
5494 | else if (!type_dependent_expression_p (t) | |
5495 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
5496 | { | |
5497 | error ("%<thread_limit%> expression must be integral"); | |
5498 | remove = true; | |
5499 | } | |
5500 | else | |
5501 | { | |
5502 | t = mark_rvalue_use (t); | |
5503 | if (!processing_template_decl) | |
5504 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
5505 | OMP_CLAUSE_THREAD_LIMIT_EXPR (c) = t; | |
5506 | } | |
5507 | break; | |
5508 | ||
5509 | case OMP_CLAUSE_DEVICE: | |
5510 | t = OMP_CLAUSE_DEVICE_ID (c); | |
5511 | if (t == error_mark_node) | |
5512 | remove = true; | |
5513 | else if (!type_dependent_expression_p (t) | |
5514 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
5515 | { | |
5516 | error ("%<device%> id must be integral"); | |
5517 | remove = true; | |
5518 | } | |
5519 | else | |
5520 | { | |
5521 | t = mark_rvalue_use (t); | |
5522 | if (!processing_template_decl) | |
5523 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
5524 | OMP_CLAUSE_DEVICE_ID (c) = t; | |
5525 | } | |
5526 | break; | |
5527 | ||
5528 | case OMP_CLAUSE_DIST_SCHEDULE: | |
5529 | t = OMP_CLAUSE_DIST_SCHEDULE_CHUNK_EXPR (c); | |
5530 | if (t == NULL) | |
5531 | ; | |
5532 | else if (t == error_mark_node) | |
5533 | remove = true; | |
5534 | else if (!type_dependent_expression_p (t) | |
5535 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
5536 | { | |
5537 | error ("%<dist_schedule%> chunk size expression must be " | |
5538 | "integral"); | |
5539 | remove = true; | |
5540 | } | |
5541 | else | |
5542 | { | |
5543 | t = mark_rvalue_use (t); | |
5544 | if (!processing_template_decl) | |
5545 | t = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
5546 | OMP_CLAUSE_DIST_SCHEDULE_CHUNK_EXPR (c) = t; | |
5547 | } | |
5548 | break; | |
5549 | ||
5550 | case OMP_CLAUSE_ALIGNED: | |
5551 | t = OMP_CLAUSE_DECL (c); | |
5552 | if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
5553 | { | |
5554 | if (processing_template_decl) | |
5555 | break; | |
5556 | if (DECL_P (t)) | |
5557 | error ("%qD is not a variable in %<aligned%> clause", t); | |
5558 | else | |
5559 | error ("%qE is not a variable in %<aligned%> clause", t); | |
5560 | remove = true; | |
5561 | } | |
5a9785fb JJ |
5562 | else if (!type_dependent_expression_p (t) |
5563 | && TREE_CODE (TREE_TYPE (t)) != POINTER_TYPE | |
5564 | && TREE_CODE (TREE_TYPE (t)) != ARRAY_TYPE | |
5565 | && (TREE_CODE (TREE_TYPE (t)) != REFERENCE_TYPE | |
5566 | || (!POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (t))) | |
5567 | && (TREE_CODE (TREE_TYPE (TREE_TYPE (t))) | |
5568 | != ARRAY_TYPE)))) | |
5569 | { | |
5570 | error_at (OMP_CLAUSE_LOCATION (c), | |
5571 | "%qE in %<aligned%> clause is neither a pointer nor " | |
5572 | "an array nor a reference to pointer or array", t); | |
5573 | remove = true; | |
5574 | } | |
acf0174b JJ |
5575 | else if (bitmap_bit_p (&aligned_head, DECL_UID (t))) |
5576 | { | |
5577 | error ("%qD appears more than once in %<aligned%> clauses", t); | |
5578 | remove = true; | |
5579 | } | |
5580 | else | |
5581 | bitmap_set_bit (&aligned_head, DECL_UID (t)); | |
5582 | t = OMP_CLAUSE_ALIGNED_ALIGNMENT (c); | |
5583 | if (t == error_mark_node) | |
5584 | remove = true; | |
5585 | else if (t == NULL_TREE) | |
5586 | break; | |
5587 | else if (!type_dependent_expression_p (t) | |
5588 | && !INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
5589 | { | |
5590 | error ("%<aligned%> clause alignment expression must " | |
5591 | "be integral"); | |
5592 | remove = true; | |
5593 | } | |
5594 | else | |
5595 | { | |
5596 | t = mark_rvalue_use (t); | |
5597 | t = maybe_constant_value (t); | |
5598 | if (!processing_template_decl) | |
5599 | { | |
5600 | if (TREE_CODE (t) != INTEGER_CST | |
5601 | || tree_int_cst_sgn (t) != 1) | |
5602 | { | |
5603 | error ("%<aligned%> clause alignment expression must be " | |
5604 | "positive constant integer expression"); | |
5605 | remove = true; | |
5606 | } | |
5607 | } | |
5608 | OMP_CLAUSE_ALIGNED_ALIGNMENT (c) = t; | |
5609 | } | |
5610 | break; | |
5611 | ||
5612 | case OMP_CLAUSE_DEPEND: | |
5613 | t = OMP_CLAUSE_DECL (c); | |
5614 | if (TREE_CODE (t) == TREE_LIST) | |
5615 | { | |
5616 | if (handle_omp_array_sections (c)) | |
5617 | remove = true; | |
5618 | break; | |
5619 | } | |
5620 | if (t == error_mark_node) | |
5621 | remove = true; | |
5622 | else if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
5623 | { | |
5624 | if (processing_template_decl) | |
5625 | break; | |
5626 | if (DECL_P (t)) | |
5627 | error ("%qD is not a variable in %<depend%> clause", t); | |
5628 | else | |
5629 | error ("%qE is not a variable in %<depend%> clause", t); | |
5630 | remove = true; | |
5631 | } | |
5632 | else if (!processing_template_decl | |
5633 | && !cxx_mark_addressable (t)) | |
5634 | remove = true; | |
5635 | break; | |
5636 | ||
5637 | case OMP_CLAUSE_MAP: | |
5638 | case OMP_CLAUSE_TO: | |
5639 | case OMP_CLAUSE_FROM: | |
5640 | t = OMP_CLAUSE_DECL (c); | |
5641 | if (TREE_CODE (t) == TREE_LIST) | |
5642 | { | |
5643 | if (handle_omp_array_sections (c)) | |
5644 | remove = true; | |
5645 | else | |
5646 | { | |
5647 | t = OMP_CLAUSE_DECL (c); | |
5648 | if (!cp_omp_mappable_type (TREE_TYPE (t))) | |
5649 | { | |
5650 | error_at (OMP_CLAUSE_LOCATION (c), | |
5651 | "array section does not have mappable type " | |
5652 | "in %qs clause", | |
5653 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
5654 | remove = true; | |
5655 | } | |
5656 | } | |
5657 | break; | |
5658 | } | |
5659 | if (t == error_mark_node) | |
5660 | remove = true; | |
5661 | else if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL) | |
5662 | { | |
5663 | if (processing_template_decl) | |
5664 | break; | |
5665 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP | |
5666 | && OMP_CLAUSE_MAP_KIND (c) == OMP_CLAUSE_MAP_POINTER) | |
5667 | break; | |
5668 | if (DECL_P (t)) | |
5669 | error ("%qD is not a variable in %qs clause", t, | |
5670 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
5671 | else | |
5672 | error ("%qE is not a variable in %qs clause", t, | |
5673 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
5674 | remove = true; | |
5675 | } | |
5676 | else if (TREE_CODE (t) == VAR_DECL && DECL_THREAD_LOCAL_P (t)) | |
5677 | { | |
5678 | error ("%qD is threadprivate variable in %qs clause", t, | |
5679 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
5680 | remove = true; | |
5681 | } | |
5682 | else if (!processing_template_decl | |
5683 | && TREE_CODE (TREE_TYPE (t)) != REFERENCE_TYPE | |
5684 | && !cxx_mark_addressable (t)) | |
5685 | remove = true; | |
5686 | else if (!(OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP | |
5687 | && OMP_CLAUSE_MAP_KIND (c) == OMP_CLAUSE_MAP_POINTER) | |
5688 | && !cp_omp_mappable_type ((TREE_CODE (TREE_TYPE (t)) | |
5689 | == REFERENCE_TYPE) | |
5690 | ? TREE_TYPE (TREE_TYPE (t)) | |
5691 | : TREE_TYPE (t))) | |
5692 | { | |
5693 | error_at (OMP_CLAUSE_LOCATION (c), | |
5694 | "%qD does not have a mappable type in %qs clause", t, | |
5695 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
5696 | remove = true; | |
5697 | } | |
5698 | else if (bitmap_bit_p (&generic_head, DECL_UID (t))) | |
5699 | { | |
5700 | if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_MAP) | |
5701 | error ("%qD appears more than once in motion clauses", t); | |
5702 | else | |
5703 | error ("%qD appears more than once in map clauses", t); | |
5704 | remove = true; | |
5705 | } | |
5706 | else | |
5707 | bitmap_set_bit (&generic_head, DECL_UID (t)); | |
5708 | break; | |
5709 | ||
5710 | case OMP_CLAUSE_UNIFORM: | |
5711 | t = OMP_CLAUSE_DECL (c); | |
5712 | if (TREE_CODE (t) != PARM_DECL) | |
5713 | { | |
5714 | if (processing_template_decl) | |
5715 | break; | |
5716 | if (DECL_P (t)) | |
5717 | error ("%qD is not an argument in %<uniform%> clause", t); | |
5718 | else | |
5719 | error ("%qE is not an argument in %<uniform%> clause", t); | |
5720 | remove = true; | |
ee1d5a02 | 5721 | break; |
acf0174b | 5722 | } |
ee1d5a02 | 5723 | goto check_dup_generic; |
acf0174b | 5724 | |
1799e5d5 RH |
5725 | case OMP_CLAUSE_NOWAIT: |
5726 | case OMP_CLAUSE_ORDERED: | |
5727 | case OMP_CLAUSE_DEFAULT: | |
a68ab351 JJ |
5728 | case OMP_CLAUSE_UNTIED: |
5729 | case OMP_CLAUSE_COLLAPSE: | |
20906c66 | 5730 | case OMP_CLAUSE_MERGEABLE: |
acf0174b JJ |
5731 | case OMP_CLAUSE_PARALLEL: |
5732 | case OMP_CLAUSE_FOR: | |
5733 | case OMP_CLAUSE_SECTIONS: | |
5734 | case OMP_CLAUSE_TASKGROUP: | |
5735 | case OMP_CLAUSE_PROC_BIND: | |
5736 | break; | |
5737 | ||
5738 | case OMP_CLAUSE_INBRANCH: | |
5739 | case OMP_CLAUSE_NOTINBRANCH: | |
5740 | if (branch_seen) | |
5741 | { | |
5742 | error ("%<inbranch%> clause is incompatible with " | |
5743 | "%<notinbranch%>"); | |
5744 | remove = true; | |
5745 | } | |
5746 | branch_seen = true; | |
1799e5d5 RH |
5747 | break; |
5748 | ||
5749 | default: | |
5750 | gcc_unreachable (); | |
5751 | } | |
5752 | ||
5753 | if (remove) | |
5754 | *pc = OMP_CLAUSE_CHAIN (c); | |
5755 | else | |
5756 | pc = &OMP_CLAUSE_CHAIN (c); | |
5757 | } | |
5758 | ||
5759 | for (pc = &clauses, c = clauses; c ; c = *pc) | |
5760 | { | |
81f40b79 | 5761 | enum omp_clause_code c_kind = OMP_CLAUSE_CODE (c); |
1799e5d5 RH |
5762 | bool remove = false; |
5763 | bool need_complete_non_reference = false; | |
5764 | bool need_default_ctor = false; | |
5765 | bool need_copy_ctor = false; | |
5766 | bool need_copy_assignment = false; | |
5767 | bool need_implicitly_determined = false; | |
acf0174b | 5768 | bool need_dtor = false; |
1799e5d5 RH |
5769 | tree type, inner_type; |
5770 | ||
5771 | switch (c_kind) | |
5772 | { | |
5773 | case OMP_CLAUSE_SHARED: | |
1799e5d5 RH |
5774 | need_implicitly_determined = true; |
5775 | break; | |
5776 | case OMP_CLAUSE_PRIVATE: | |
1799e5d5 RH |
5777 | need_complete_non_reference = true; |
5778 | need_default_ctor = true; | |
acf0174b | 5779 | need_dtor = true; |
1799e5d5 RH |
5780 | need_implicitly_determined = true; |
5781 | break; | |
5782 | case OMP_CLAUSE_FIRSTPRIVATE: | |
1799e5d5 RH |
5783 | need_complete_non_reference = true; |
5784 | need_copy_ctor = true; | |
acf0174b | 5785 | need_dtor = true; |
1799e5d5 RH |
5786 | need_implicitly_determined = true; |
5787 | break; | |
5788 | case OMP_CLAUSE_LASTPRIVATE: | |
1799e5d5 RH |
5789 | need_complete_non_reference = true; |
5790 | need_copy_assignment = true; | |
5791 | need_implicitly_determined = true; | |
5792 | break; | |
5793 | case OMP_CLAUSE_REDUCTION: | |
1799e5d5 RH |
5794 | need_implicitly_determined = true; |
5795 | break; | |
5796 | case OMP_CLAUSE_COPYPRIVATE: | |
1799e5d5 RH |
5797 | need_copy_assignment = true; |
5798 | break; | |
5799 | case OMP_CLAUSE_COPYIN: | |
1799e5d5 RH |
5800 | need_copy_assignment = true; |
5801 | break; | |
acf0174b JJ |
5802 | case OMP_CLAUSE_NOWAIT: |
5803 | if (copyprivate_seen) | |
5804 | { | |
5805 | error_at (OMP_CLAUSE_LOCATION (c), | |
5806 | "%<nowait%> clause must not be used together " | |
5807 | "with %<copyprivate%>"); | |
5808 | *pc = OMP_CLAUSE_CHAIN (c); | |
5809 | continue; | |
5810 | } | |
5811 | /* FALLTHRU */ | |
1799e5d5 RH |
5812 | default: |
5813 | pc = &OMP_CLAUSE_CHAIN (c); | |
5814 | continue; | |
5815 | } | |
5816 | ||
5817 | t = OMP_CLAUSE_DECL (c); | |
5818 | if (processing_template_decl | |
5a6ccc94 | 5819 | && !VAR_P (t) && TREE_CODE (t) != PARM_DECL) |
1799e5d5 RH |
5820 | { |
5821 | pc = &OMP_CLAUSE_CHAIN (c); | |
5822 | continue; | |
5823 | } | |
5824 | ||
5825 | switch (c_kind) | |
5826 | { | |
5827 | case OMP_CLAUSE_LASTPRIVATE: | |
5828 | if (!bitmap_bit_p (&firstprivate_head, DECL_UID (t))) | |
acf0174b JJ |
5829 | { |
5830 | need_default_ctor = true; | |
5831 | need_dtor = true; | |
5832 | } | |
1799e5d5 RH |
5833 | break; |
5834 | ||
5835 | case OMP_CLAUSE_REDUCTION: | |
acf0174b JJ |
5836 | if (finish_omp_reduction_clause (c, &need_default_ctor, |
5837 | &need_dtor)) | |
5838 | remove = true; | |
5839 | else | |
5840 | t = OMP_CLAUSE_DECL (c); | |
1799e5d5 RH |
5841 | break; |
5842 | ||
5843 | case OMP_CLAUSE_COPYIN: | |
5a6ccc94 | 5844 | if (!VAR_P (t) || !DECL_THREAD_LOCAL_P (t)) |
1799e5d5 RH |
5845 | { |
5846 | error ("%qE must be %<threadprivate%> for %<copyin%>", t); | |
5847 | remove = true; | |
5848 | } | |
5849 | break; | |
5850 | ||
5851 | default: | |
5852 | break; | |
5853 | } | |
5854 | ||
8a8c12a3 | 5855 | if (need_complete_non_reference || need_copy_assignment) |
1799e5d5 RH |
5856 | { |
5857 | t = require_complete_type (t); | |
5858 | if (t == error_mark_node) | |
5859 | remove = true; | |
8a8c12a3 JJ |
5860 | else if (TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE |
5861 | && need_complete_non_reference) | |
1799e5d5 | 5862 | { |
acf0174b JJ |
5863 | error ("%qE has reference type for %qs", t, |
5864 | omp_clause_code_name[OMP_CLAUSE_CODE (c)]); | |
1799e5d5 RH |
5865 | remove = true; |
5866 | } | |
5867 | } | |
5868 | if (need_implicitly_determined) | |
5869 | { | |
5870 | const char *share_name = NULL; | |
5871 | ||
5a6ccc94 | 5872 | if (VAR_P (t) && DECL_THREAD_LOCAL_P (t)) |
1799e5d5 RH |
5873 | share_name = "threadprivate"; |
5874 | else switch (cxx_omp_predetermined_sharing (t)) | |
5875 | { | |
5876 | case OMP_CLAUSE_DEFAULT_UNSPECIFIED: | |
5877 | break; | |
5878 | case OMP_CLAUSE_DEFAULT_SHARED: | |
20906c66 JJ |
5879 | /* const vars may be specified in firstprivate clause. */ |
5880 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE | |
5881 | && cxx_omp_const_qual_no_mutable (t)) | |
5882 | break; | |
1799e5d5 RH |
5883 | share_name = "shared"; |
5884 | break; | |
5885 | case OMP_CLAUSE_DEFAULT_PRIVATE: | |
5886 | share_name = "private"; | |
5887 | break; | |
5888 | default: | |
5889 | gcc_unreachable (); | |
5890 | } | |
5891 | if (share_name) | |
5892 | { | |
5893 | error ("%qE is predetermined %qs for %qs", | |
acf0174b | 5894 | t, share_name, omp_clause_code_name[OMP_CLAUSE_CODE (c)]); |
1799e5d5 RH |
5895 | remove = true; |
5896 | } | |
5897 | } | |
5898 | ||
5899 | /* We're interested in the base element, not arrays. */ | |
5900 | inner_type = type = TREE_TYPE (t); | |
5901 | while (TREE_CODE (inner_type) == ARRAY_TYPE) | |
5902 | inner_type = TREE_TYPE (inner_type); | |
5903 | ||
acf0174b JJ |
5904 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION |
5905 | && TREE_CODE (inner_type) == REFERENCE_TYPE) | |
5906 | inner_type = TREE_TYPE (inner_type); | |
5907 | ||
84dc00e8 | 5908 | /* Check for special function availability by building a call to one. |
1799e5d5 RH |
5909 | Save the results, because later we won't be in the right context |
5910 | for making these queries. */ | |
5911 | if (CLASS_TYPE_P (inner_type) | |
8a8c12a3 | 5912 | && COMPLETE_TYPE_P (inner_type) |
acf0174b JJ |
5913 | && (need_default_ctor || need_copy_ctor |
5914 | || need_copy_assignment || need_dtor) | |
a68ab351 JJ |
5915 | && !type_dependent_expression_p (t) |
5916 | && cxx_omp_create_clause_info (c, inner_type, need_default_ctor, | |
acf0174b JJ |
5917 | need_copy_ctor, need_copy_assignment, |
5918 | need_dtor)) | |
a68ab351 | 5919 | remove = true; |
1799e5d5 RH |
5920 | |
5921 | if (remove) | |
5922 | *pc = OMP_CLAUSE_CHAIN (c); | |
5923 | else | |
5924 | pc = &OMP_CLAUSE_CHAIN (c); | |
5925 | } | |
5926 | ||
5927 | bitmap_obstack_release (NULL); | |
5928 | return clauses; | |
5929 | } | |
5930 | ||
5931 | /* For all variables in the tree_list VARS, mark them as thread local. */ | |
5932 | ||
5933 | void | |
5934 | finish_omp_threadprivate (tree vars) | |
5935 | { | |
5936 | tree t; | |
5937 | ||
5938 | /* Mark every variable in VARS to be assigned thread local storage. */ | |
5939 | for (t = vars; t; t = TREE_CHAIN (t)) | |
5940 | { | |
5941 | tree v = TREE_PURPOSE (t); | |
5942 | ||
edb6000e JJ |
5943 | if (error_operand_p (v)) |
5944 | ; | |
5a6ccc94 | 5945 | else if (!VAR_P (v)) |
edb6000e JJ |
5946 | error ("%<threadprivate%> %qD is not file, namespace " |
5947 | "or block scope variable", v); | |
1799e5d5 RH |
5948 | /* If V had already been marked threadprivate, it doesn't matter |
5949 | whether it had been used prior to this point. */ | |
edb6000e | 5950 | else if (TREE_USED (v) |
1799e5d5 RH |
5951 | && (DECL_LANG_SPECIFIC (v) == NULL |
5952 | || !CP_DECL_THREADPRIVATE_P (v))) | |
5953 | error ("%qE declared %<threadprivate%> after first use", v); | |
5954 | else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v)) | |
5955 | error ("automatic variable %qE cannot be %<threadprivate%>", v); | |
57c3feb4 | 5956 | else if (! COMPLETE_TYPE_P (complete_type (TREE_TYPE (v)))) |
1799e5d5 | 5957 | error ("%<threadprivate%> %qE has incomplete type", v); |
a68ab351 JJ |
5958 | else if (TREE_STATIC (v) && TYPE_P (CP_DECL_CONTEXT (v)) |
5959 | && CP_DECL_CONTEXT (v) != current_class_type) | |
5960 | error ("%<threadprivate%> %qE directive not " | |
5961 | "in %qT definition", v, CP_DECL_CONTEXT (v)); | |
1799e5d5 RH |
5962 | else |
5963 | { | |
5964 | /* Allocate a LANG_SPECIFIC structure for V, if needed. */ | |
5965 | if (DECL_LANG_SPECIFIC (v) == NULL) | |
5966 | { | |
5967 | retrofit_lang_decl (v); | |
5968 | ||
5969 | /* Make sure that DECL_DISCRIMINATOR_P continues to be true | |
5970 | after the allocation of the lang_decl structure. */ | |
5971 | if (DECL_DISCRIMINATOR_P (v)) | |
b97e8a14 | 5972 | DECL_LANG_SPECIFIC (v)->u.base.u2sel = 1; |
1799e5d5 RH |
5973 | } |
5974 | ||
5975 | if (! DECL_THREAD_LOCAL_P (v)) | |
5976 | { | |
56363ffd | 5977 | set_decl_tls_model (v, decl_default_tls_model (v)); |
1799e5d5 RH |
5978 | /* If rtl has been already set for this var, call |
5979 | make_decl_rtl once again, so that encode_section_info | |
5980 | has a chance to look at the new decl flags. */ | |
5981 | if (DECL_RTL_SET_P (v)) | |
5982 | make_decl_rtl (v); | |
5983 | } | |
5984 | CP_DECL_THREADPRIVATE_P (v) = 1; | |
5985 | } | |
5986 | } | |
5987 | } | |
5988 | ||
5989 | /* Build an OpenMP structured block. */ | |
5990 | ||
5991 | tree | |
5992 | begin_omp_structured_block (void) | |
5993 | { | |
5994 | return do_pushlevel (sk_omp); | |
5995 | } | |
5996 | ||
5997 | tree | |
5998 | finish_omp_structured_block (tree block) | |
5999 | { | |
6000 | return do_poplevel (block); | |
6001 | } | |
6002 | ||
84dc00e8 | 6003 | /* Similarly, except force the retention of the BLOCK. */ |
1799e5d5 RH |
6004 | |
6005 | tree | |
6006 | begin_omp_parallel (void) | |
6007 | { | |
6008 | keep_next_level (true); | |
6009 | return begin_omp_structured_block (); | |
6010 | } | |
6011 | ||
6012 | tree | |
6013 | finish_omp_parallel (tree clauses, tree body) | |
6014 | { | |
6015 | tree stmt; | |
6016 | ||
6017 | body = finish_omp_structured_block (body); | |
b850de4f | 6018 | |
1799e5d5 RH |
6019 | stmt = make_node (OMP_PARALLEL); |
6020 | TREE_TYPE (stmt) = void_type_node; | |
6021 | OMP_PARALLEL_CLAUSES (stmt) = clauses; | |
6022 | OMP_PARALLEL_BODY (stmt) = body; | |
54f7877c | 6023 | |
1799e5d5 RH |
6024 | return add_stmt (stmt); |
6025 | } | |
6026 | ||
a68ab351 JJ |
6027 | tree |
6028 | begin_omp_task (void) | |
6029 | { | |
6030 | keep_next_level (true); | |
6031 | return begin_omp_structured_block (); | |
6032 | } | |
6033 | ||
6034 | tree | |
6035 | finish_omp_task (tree clauses, tree body) | |
6036 | { | |
6037 | tree stmt; | |
6038 | ||
6039 | body = finish_omp_structured_block (body); | |
6040 | ||
6041 | stmt = make_node (OMP_TASK); | |
6042 | TREE_TYPE (stmt) = void_type_node; | |
6043 | OMP_TASK_CLAUSES (stmt) = clauses; | |
6044 | OMP_TASK_BODY (stmt) = body; | |
6045 | ||
6046 | return add_stmt (stmt); | |
6047 | } | |
6048 | ||
6049 | /* Helper function for finish_omp_for. Convert Ith random access iterator | |
6050 | into integral iterator. Return FALSE if successful. */ | |
6051 | ||
6052 | static bool | |
6053 | handle_omp_for_class_iterator (int i, location_t locus, tree declv, tree initv, | |
6054 | tree condv, tree incrv, tree *body, | |
6055 | tree *pre_body, tree clauses) | |
6056 | { | |
6057 | tree diff, iter_init, iter_incr = NULL, last; | |
6058 | tree incr_var = NULL, orig_pre_body, orig_body, c; | |
6059 | tree decl = TREE_VEC_ELT (declv, i); | |
6060 | tree init = TREE_VEC_ELT (initv, i); | |
6061 | tree cond = TREE_VEC_ELT (condv, i); | |
6062 | tree incr = TREE_VEC_ELT (incrv, i); | |
6063 | tree iter = decl; | |
6064 | location_t elocus = locus; | |
6065 | ||
6066 | if (init && EXPR_HAS_LOCATION (init)) | |
6067 | elocus = EXPR_LOCATION (init); | |
6068 | ||
6069 | switch (TREE_CODE (cond)) | |
6070 | { | |
6071 | case GT_EXPR: | |
6072 | case GE_EXPR: | |
6073 | case LT_EXPR: | |
6074 | case LE_EXPR: | |
c5cdb03f JJ |
6075 | if (TREE_OPERAND (cond, 1) == iter) |
6076 | cond = build2 (swap_tree_comparison (TREE_CODE (cond)), | |
6077 | TREE_TYPE (cond), iter, TREE_OPERAND (cond, 0)); | |
a68ab351 JJ |
6078 | if (TREE_OPERAND (cond, 0) != iter) |
6079 | cond = error_mark_node; | |
6080 | else | |
6081 | { | |
f330f599 PC |
6082 | tree tem = build_x_binary_op (EXPR_LOCATION (cond), |
6083 | TREE_CODE (cond), | |
4fe977f2 | 6084 | iter, ERROR_MARK, |
a68ab351 JJ |
6085 | TREE_OPERAND (cond, 1), ERROR_MARK, |
6086 | NULL, tf_warning_or_error); | |
6087 | if (error_operand_p (tem)) | |
6088 | return true; | |
6089 | } | |
6090 | break; | |
6091 | default: | |
6092 | cond = error_mark_node; | |
6093 | break; | |
6094 | } | |
6095 | if (cond == error_mark_node) | |
6096 | { | |
69bc6bff | 6097 | error_at (elocus, "invalid controlling predicate"); |
a68ab351 JJ |
6098 | return true; |
6099 | } | |
f330f599 | 6100 | diff = build_x_binary_op (elocus, MINUS_EXPR, TREE_OPERAND (cond, 1), |
a68ab351 JJ |
6101 | ERROR_MARK, iter, ERROR_MARK, NULL, |
6102 | tf_warning_or_error); | |
6103 | if (error_operand_p (diff)) | |
6104 | return true; | |
6105 | if (TREE_CODE (TREE_TYPE (diff)) != INTEGER_TYPE) | |
6106 | { | |
69bc6bff MLI |
6107 | error_at (elocus, "difference between %qE and %qD does not have integer type", |
6108 | TREE_OPERAND (cond, 1), iter); | |
a68ab351 JJ |
6109 | return true; |
6110 | } | |
6111 | ||
6112 | switch (TREE_CODE (incr)) | |
6113 | { | |
6114 | case PREINCREMENT_EXPR: | |
6115 | case PREDECREMENT_EXPR: | |
6116 | case POSTINCREMENT_EXPR: | |
6117 | case POSTDECREMENT_EXPR: | |
6118 | if (TREE_OPERAND (incr, 0) != iter) | |
6119 | { | |
6120 | incr = error_mark_node; | |
6121 | break; | |
6122 | } | |
f330f599 PC |
6123 | iter_incr = build_x_unary_op (EXPR_LOCATION (incr), |
6124 | TREE_CODE (incr), iter, | |
a68ab351 JJ |
6125 | tf_warning_or_error); |
6126 | if (error_operand_p (iter_incr)) | |
6127 | return true; | |
6128 | else if (TREE_CODE (incr) == PREINCREMENT_EXPR | |
6129 | || TREE_CODE (incr) == POSTINCREMENT_EXPR) | |
6130 | incr = integer_one_node; | |
6131 | else | |
6132 | incr = integer_minus_one_node; | |
6133 | break; | |
6134 | case MODIFY_EXPR: | |
6135 | if (TREE_OPERAND (incr, 0) != iter) | |
6136 | incr = error_mark_node; | |
6137 | else if (TREE_CODE (TREE_OPERAND (incr, 1)) == PLUS_EXPR | |
6138 | || TREE_CODE (TREE_OPERAND (incr, 1)) == MINUS_EXPR) | |
6139 | { | |
6140 | tree rhs = TREE_OPERAND (incr, 1); | |
6141 | if (TREE_OPERAND (rhs, 0) == iter) | |
6142 | { | |
6143 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (rhs, 1))) | |
6144 | != INTEGER_TYPE) | |
6145 | incr = error_mark_node; | |
6146 | else | |
6147 | { | |
f330f599 PC |
6148 | iter_incr = build_x_modify_expr (EXPR_LOCATION (rhs), |
6149 | iter, TREE_CODE (rhs), | |
a68ab351 JJ |
6150 | TREE_OPERAND (rhs, 1), |
6151 | tf_warning_or_error); | |
6152 | if (error_operand_p (iter_incr)) | |
6153 | return true; | |
6154 | incr = TREE_OPERAND (rhs, 1); | |
4b978f96 PC |
6155 | incr = cp_convert (TREE_TYPE (diff), incr, |
6156 | tf_warning_or_error); | |
a68ab351 JJ |
6157 | if (TREE_CODE (rhs) == MINUS_EXPR) |
6158 | { | |
6159 | incr = build1 (NEGATE_EXPR, TREE_TYPE (diff), incr); | |
6160 | incr = fold_if_not_in_template (incr); | |
6161 | } | |
6162 | if (TREE_CODE (incr) != INTEGER_CST | |
6163 | && (TREE_CODE (incr) != NOP_EXPR | |
6164 | || (TREE_CODE (TREE_OPERAND (incr, 0)) | |
6165 | != INTEGER_CST))) | |
6166 | iter_incr = NULL; | |
6167 | } | |
6168 | } | |
6169 | else if (TREE_OPERAND (rhs, 1) == iter) | |
6170 | { | |
6171 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (rhs, 0))) != INTEGER_TYPE | |
6172 | || TREE_CODE (rhs) != PLUS_EXPR) | |
6173 | incr = error_mark_node; | |
6174 | else | |
6175 | { | |
f330f599 PC |
6176 | iter_incr = build_x_binary_op (EXPR_LOCATION (rhs), |
6177 | PLUS_EXPR, | |
a68ab351 JJ |
6178 | TREE_OPERAND (rhs, 0), |
6179 | ERROR_MARK, iter, | |
6180 | ERROR_MARK, NULL, | |
6181 | tf_warning_or_error); | |
6182 | if (error_operand_p (iter_incr)) | |
6183 | return true; | |
f330f599 PC |
6184 | iter_incr = build_x_modify_expr (EXPR_LOCATION (rhs), |
6185 | iter, NOP_EXPR, | |
a68ab351 JJ |
6186 | iter_incr, |
6187 | tf_warning_or_error); | |
6188 | if (error_operand_p (iter_incr)) | |
6189 | return true; | |
6190 | incr = TREE_OPERAND (rhs, 0); | |
6191 | iter_incr = NULL; | |
6192 | } | |
6193 | } | |
6194 | else | |
6195 | incr = error_mark_node; | |
6196 | } | |
6197 | else | |
6198 | incr = error_mark_node; | |
6199 | break; | |
6200 | default: | |
6201 | incr = error_mark_node; | |
6202 | break; | |
6203 | } | |
6204 | ||
6205 | if (incr == error_mark_node) | |
6206 | { | |
69bc6bff | 6207 | error_at (elocus, "invalid increment expression"); |
a68ab351 JJ |
6208 | return true; |
6209 | } | |
6210 | ||
4b978f96 | 6211 | incr = cp_convert (TREE_TYPE (diff), incr, tf_warning_or_error); |
a68ab351 JJ |
6212 | for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c)) |
6213 | if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE | |
6214 | && OMP_CLAUSE_DECL (c) == iter) | |
6215 | break; | |
6216 | ||
6217 | decl = create_temporary_var (TREE_TYPE (diff)); | |
6218 | pushdecl (decl); | |
6219 | add_decl_expr (decl); | |
6220 | last = create_temporary_var (TREE_TYPE (diff)); | |
6221 | pushdecl (last); | |
6222 | add_decl_expr (last); | |
6223 | if (c && iter_incr == NULL) | |
6224 | { | |
6225 | incr_var = create_temporary_var (TREE_TYPE (diff)); | |
6226 | pushdecl (incr_var); | |
6227 | add_decl_expr (incr_var); | |
6228 | } | |
6229 | gcc_assert (stmts_are_full_exprs_p ()); | |
6230 | ||
6231 | orig_pre_body = *pre_body; | |
6232 | *pre_body = push_stmt_list (); | |
6233 | if (orig_pre_body) | |
6234 | add_stmt (orig_pre_body); | |
6235 | if (init != NULL) | |
f330f599 PC |
6236 | finish_expr_stmt (build_x_modify_expr (elocus, |
6237 | iter, NOP_EXPR, init, | |
a68ab351 JJ |
6238 | tf_warning_or_error)); |
6239 | init = build_int_cst (TREE_TYPE (diff), 0); | |
6240 | if (c && iter_incr == NULL) | |
6241 | { | |
f330f599 PC |
6242 | finish_expr_stmt (build_x_modify_expr (elocus, |
6243 | incr_var, NOP_EXPR, | |
a68ab351 JJ |
6244 | incr, tf_warning_or_error)); |
6245 | incr = incr_var; | |
f330f599 PC |
6246 | iter_incr = build_x_modify_expr (elocus, |
6247 | iter, PLUS_EXPR, incr, | |
a68ab351 JJ |
6248 | tf_warning_or_error); |
6249 | } | |
f330f599 PC |
6250 | finish_expr_stmt (build_x_modify_expr (elocus, |
6251 | last, NOP_EXPR, init, | |
a68ab351 JJ |
6252 | tf_warning_or_error)); |
6253 | *pre_body = pop_stmt_list (*pre_body); | |
6254 | ||
ba47d38d AH |
6255 | cond = cp_build_binary_op (elocus, |
6256 | TREE_CODE (cond), decl, diff, | |
a68ab351 | 6257 | tf_warning_or_error); |
32e8bb8e | 6258 | incr = build_modify_expr (elocus, decl, NULL_TREE, PLUS_EXPR, |
c2255bc4 | 6259 | elocus, incr, NULL_TREE); |
a68ab351 JJ |
6260 | |
6261 | orig_body = *body; | |
6262 | *body = push_stmt_list (); | |
6263 | iter_init = build2 (MINUS_EXPR, TREE_TYPE (diff), decl, last); | |
f330f599 PC |
6264 | iter_init = build_x_modify_expr (elocus, |
6265 | iter, PLUS_EXPR, iter_init, | |
a68ab351 JJ |
6266 | tf_warning_or_error); |
6267 | iter_init = build1 (NOP_EXPR, void_type_node, iter_init); | |
6268 | finish_expr_stmt (iter_init); | |
f330f599 PC |
6269 | finish_expr_stmt (build_x_modify_expr (elocus, |
6270 | last, NOP_EXPR, decl, | |
a68ab351 JJ |
6271 | tf_warning_or_error)); |
6272 | add_stmt (orig_body); | |
6273 | *body = pop_stmt_list (*body); | |
6274 | ||
6275 | if (c) | |
6276 | { | |
6277 | OMP_CLAUSE_LASTPRIVATE_STMT (c) = push_stmt_list (); | |
6278 | finish_expr_stmt (iter_incr); | |
6279 | OMP_CLAUSE_LASTPRIVATE_STMT (c) | |
6280 | = pop_stmt_list (OMP_CLAUSE_LASTPRIVATE_STMT (c)); | |
6281 | } | |
6282 | ||
6283 | TREE_VEC_ELT (declv, i) = decl; | |
6284 | TREE_VEC_ELT (initv, i) = init; | |
6285 | TREE_VEC_ELT (condv, i) = cond; | |
6286 | TREE_VEC_ELT (incrv, i) = incr; | |
6287 | ||
6288 | return false; | |
6289 | } | |
6290 | ||
1799e5d5 RH |
6291 | /* Build and validate an OMP_FOR statement. CLAUSES, BODY, COND, INCR |
6292 | are directly for their associated operands in the statement. DECL | |
6293 | and INIT are a combo; if DECL is NULL then INIT ought to be a | |
6294 | MODIFY_EXPR, and the DECL should be extracted. PRE_BODY are | |
6295 | optional statements that need to go before the loop into its | |
6296 | sk_omp scope. */ | |
6297 | ||
6298 | tree | |
acf0174b JJ |
6299 | finish_omp_for (location_t locus, enum tree_code code, tree declv, tree initv, |
6300 | tree condv, tree incrv, tree body, tree pre_body, tree clauses) | |
a68ab351 JJ |
6301 | { |
6302 | tree omp_for = NULL, orig_incr = NULL; | |
6303 | tree decl, init, cond, incr; | |
6304 | location_t elocus; | |
6305 | int i; | |
6306 | ||
6307 | gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (initv)); | |
6308 | gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (condv)); | |
6309 | gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (incrv)); | |
6310 | for (i = 0; i < TREE_VEC_LENGTH (declv); i++) | |
6311 | { | |
6312 | decl = TREE_VEC_ELT (declv, i); | |
6313 | init = TREE_VEC_ELT (initv, i); | |
6314 | cond = TREE_VEC_ELT (condv, i); | |
6315 | incr = TREE_VEC_ELT (incrv, i); | |
6316 | elocus = locus; | |
6317 | ||
6318 | if (decl == NULL) | |
6319 | { | |
6320 | if (init != NULL) | |
6321 | switch (TREE_CODE (init)) | |
1799e5d5 | 6322 | { |
a68ab351 | 6323 | case MODIFY_EXPR: |
1799e5d5 | 6324 | decl = TREE_OPERAND (init, 0); |
a68ab351 JJ |
6325 | init = TREE_OPERAND (init, 1); |
6326 | break; | |
6327 | case MODOP_EXPR: | |
6328 | if (TREE_CODE (TREE_OPERAND (init, 1)) == NOP_EXPR) | |
6329 | { | |
6330 | decl = TREE_OPERAND (init, 0); | |
6331 | init = TREE_OPERAND (init, 2); | |
6332 | } | |
6333 | break; | |
6334 | default: | |
6335 | break; | |
1799e5d5 | 6336 | } |
1799e5d5 | 6337 | |
a68ab351 JJ |
6338 | if (decl == NULL) |
6339 | { | |
69bc6bff MLI |
6340 | error_at (locus, |
6341 | "expected iteration declaration or initialization"); | |
a68ab351 JJ |
6342 | return NULL; |
6343 | } | |
1799e5d5 | 6344 | } |
1799e5d5 | 6345 | |
a68ab351 JJ |
6346 | if (init && EXPR_HAS_LOCATION (init)) |
6347 | elocus = EXPR_LOCATION (init); | |
1799e5d5 RH |
6348 | |
6349 | if (cond == NULL) | |
6350 | { | |
69bc6bff | 6351 | error_at (elocus, "missing controlling predicate"); |
1799e5d5 RH |
6352 | return NULL; |
6353 | } | |
6354 | ||
6355 | if (incr == NULL) | |
6356 | { | |
69bc6bff | 6357 | error_at (elocus, "missing increment expression"); |
1799e5d5 RH |
6358 | return NULL; |
6359 | } | |
6360 | ||
a68ab351 JJ |
6361 | TREE_VEC_ELT (declv, i) = decl; |
6362 | TREE_VEC_ELT (initv, i) = init; | |
6363 | } | |
6364 | ||
6365 | if (dependent_omp_for_p (declv, initv, condv, incrv)) | |
6366 | { | |
6367 | tree stmt; | |
6368 | ||
acf0174b | 6369 | stmt = make_node (code); |
1799e5d5 | 6370 | |
a68ab351 JJ |
6371 | for (i = 0; i < TREE_VEC_LENGTH (declv); i++) |
6372 | { | |
6373 | /* This is really just a place-holder. We'll be decomposing this | |
6374 | again and going through the cp_build_modify_expr path below when | |
6375 | we instantiate the thing. */ | |
6376 | TREE_VEC_ELT (initv, i) | |
6377 | = build2 (MODIFY_EXPR, void_type_node, TREE_VEC_ELT (declv, i), | |
6378 | TREE_VEC_ELT (initv, i)); | |
6379 | } | |
1799e5d5 RH |
6380 | |
6381 | TREE_TYPE (stmt) = void_type_node; | |
a68ab351 JJ |
6382 | OMP_FOR_INIT (stmt) = initv; |
6383 | OMP_FOR_COND (stmt) = condv; | |
6384 | OMP_FOR_INCR (stmt) = incrv; | |
1799e5d5 RH |
6385 | OMP_FOR_BODY (stmt) = body; |
6386 | OMP_FOR_PRE_BODY (stmt) = pre_body; | |
a68ab351 | 6387 | OMP_FOR_CLAUSES (stmt) = clauses; |
1799e5d5 RH |
6388 | |
6389 | SET_EXPR_LOCATION (stmt, locus); | |
6390 | return add_stmt (stmt); | |
6391 | } | |
6392 | ||
a68ab351 JJ |
6393 | if (processing_template_decl) |
6394 | orig_incr = make_tree_vec (TREE_VEC_LENGTH (incrv)); | |
1799e5d5 | 6395 | |
a68ab351 | 6396 | for (i = 0; i < TREE_VEC_LENGTH (declv); ) |
dadb19e0 | 6397 | { |
a68ab351 JJ |
6398 | decl = TREE_VEC_ELT (declv, i); |
6399 | init = TREE_VEC_ELT (initv, i); | |
6400 | cond = TREE_VEC_ELT (condv, i); | |
6401 | incr = TREE_VEC_ELT (incrv, i); | |
6402 | if (orig_incr) | |
6403 | TREE_VEC_ELT (orig_incr, i) = incr; | |
6404 | elocus = locus; | |
6405 | ||
6406 | if (init && EXPR_HAS_LOCATION (init)) | |
dadb19e0 | 6407 | elocus = EXPR_LOCATION (init); |
dadb19e0 | 6408 | |
a68ab351 JJ |
6409 | if (!DECL_P (decl)) |
6410 | { | |
69bc6bff | 6411 | error_at (elocus, "expected iteration declaration or initialization"); |
a68ab351 JJ |
6412 | return NULL; |
6413 | } | |
969c111d | 6414 | |
a68ab351 JJ |
6415 | if (incr && TREE_CODE (incr) == MODOP_EXPR) |
6416 | { | |
6417 | if (orig_incr) | |
6418 | TREE_VEC_ELT (orig_incr, i) = incr; | |
6419 | incr = cp_build_modify_expr (TREE_OPERAND (incr, 0), | |
6420 | TREE_CODE (TREE_OPERAND (incr, 1)), | |
6421 | TREE_OPERAND (incr, 2), | |
6422 | tf_warning_or_error); | |
6423 | } | |
6424 | ||
6425 | if (CLASS_TYPE_P (TREE_TYPE (decl))) | |
6426 | { | |
acf0174b JJ |
6427 | if (code == OMP_SIMD) |
6428 | { | |
6429 | error_at (elocus, "%<#pragma omp simd%> used with class " | |
6430 | "iteration variable %qE", decl); | |
6431 | return NULL; | |
6432 | } | |
a68ab351 JJ |
6433 | if (handle_omp_for_class_iterator (i, locus, declv, initv, condv, |
6434 | incrv, &body, &pre_body, clauses)) | |
6435 | return NULL; | |
6436 | continue; | |
6437 | } | |
6438 | ||
6439 | if (!INTEGRAL_TYPE_P (TREE_TYPE (decl)) | |
50e10fa8 | 6440 | && !TYPE_PTR_P (TREE_TYPE (decl))) |
a68ab351 | 6441 | { |
69bc6bff | 6442 | error_at (elocus, "invalid type for iteration variable %qE", decl); |
a68ab351 JJ |
6443 | return NULL; |
6444 | } | |
969c111d | 6445 | |
b2ebd268 | 6446 | if (!processing_template_decl) |
8569b2d0 JJ |
6447 | { |
6448 | init = fold_build_cleanup_point_expr (TREE_TYPE (init), init); | |
6449 | init = cp_build_modify_expr (decl, NOP_EXPR, init, tf_warning_or_error); | |
6450 | } | |
6451 | else | |
6452 | init = build2 (MODIFY_EXPR, void_type_node, decl, init); | |
e4ebaef3 JJ |
6453 | if (cond |
6454 | && TREE_SIDE_EFFECTS (cond) | |
6455 | && COMPARISON_CLASS_P (cond) | |
6456 | && !processing_template_decl) | |
a68ab351 | 6457 | { |
e4ebaef3 JJ |
6458 | tree t = TREE_OPERAND (cond, 0); |
6459 | if (TREE_SIDE_EFFECTS (t) | |
6460 | && t != decl | |
6461 | && (TREE_CODE (t) != NOP_EXPR | |
6462 | || TREE_OPERAND (t, 0) != decl)) | |
6463 | TREE_OPERAND (cond, 0) | |
6464 | = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
a68ab351 | 6465 | |
e4ebaef3 JJ |
6466 | t = TREE_OPERAND (cond, 1); |
6467 | if (TREE_SIDE_EFFECTS (t) | |
6468 | && t != decl | |
6469 | && (TREE_CODE (t) != NOP_EXPR | |
6470 | || TREE_OPERAND (t, 0) != decl)) | |
6471 | TREE_OPERAND (cond, 1) | |
a68ab351 JJ |
6472 | = fold_build_cleanup_point_expr (TREE_TYPE (t), t); |
6473 | } | |
6474 | if (decl == error_mark_node || init == error_mark_node) | |
6475 | return NULL; | |
6476 | ||
6477 | TREE_VEC_ELT (declv, i) = decl; | |
6478 | TREE_VEC_ELT (initv, i) = init; | |
6479 | TREE_VEC_ELT (condv, i) = cond; | |
6480 | TREE_VEC_ELT (incrv, i) = incr; | |
6481 | i++; | |
969c111d | 6482 | } |
a68ab351 JJ |
6483 | |
6484 | if (IS_EMPTY_STMT (pre_body)) | |
6485 | pre_body = NULL; | |
6486 | ||
acf0174b | 6487 | omp_for = c_finish_omp_for (locus, code, declv, initv, condv, incrv, |
a68ab351 JJ |
6488 | body, pre_body); |
6489 | ||
6490 | if (omp_for == NULL) | |
6491 | return NULL; | |
6492 | ||
6493 | for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INCR (omp_for)); i++) | |
969c111d | 6494 | { |
e4ebaef3 JJ |
6495 | decl = TREE_OPERAND (TREE_VEC_ELT (OMP_FOR_INIT (omp_for), i), 0); |
6496 | incr = TREE_VEC_ELT (OMP_FOR_INCR (omp_for), i); | |
969c111d | 6497 | |
a68ab351 JJ |
6498 | if (TREE_CODE (incr) != MODIFY_EXPR) |
6499 | continue; | |
6500 | ||
6501 | if (TREE_SIDE_EFFECTS (TREE_OPERAND (incr, 1)) | |
e4ebaef3 JJ |
6502 | && BINARY_CLASS_P (TREE_OPERAND (incr, 1)) |
6503 | && !processing_template_decl) | |
a68ab351 | 6504 | { |
e4ebaef3 JJ |
6505 | tree t = TREE_OPERAND (TREE_OPERAND (incr, 1), 0); |
6506 | if (TREE_SIDE_EFFECTS (t) | |
6507 | && t != decl | |
6508 | && (TREE_CODE (t) != NOP_EXPR | |
6509 | || TREE_OPERAND (t, 0) != decl)) | |
6510 | TREE_OPERAND (TREE_OPERAND (incr, 1), 0) | |
6511 | = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
a68ab351 | 6512 | |
e4ebaef3 JJ |
6513 | t = TREE_OPERAND (TREE_OPERAND (incr, 1), 1); |
6514 | if (TREE_SIDE_EFFECTS (t) | |
6515 | && t != decl | |
6516 | && (TREE_CODE (t) != NOP_EXPR | |
6517 | || TREE_OPERAND (t, 0) != decl)) | |
6518 | TREE_OPERAND (TREE_OPERAND (incr, 1), 1) | |
6519 | = fold_build_cleanup_point_expr (TREE_TYPE (t), t); | |
a68ab351 JJ |
6520 | } |
6521 | ||
6522 | if (orig_incr) | |
6523 | TREE_VEC_ELT (OMP_FOR_INCR (omp_for), i) = TREE_VEC_ELT (orig_incr, i); | |
969c111d | 6524 | } |
a68ab351 JJ |
6525 | if (omp_for != NULL) |
6526 | OMP_FOR_CLAUSES (omp_for) = clauses; | |
969c111d | 6527 | return omp_for; |
1799e5d5 RH |
6528 | } |
6529 | ||
6530 | void | |
20906c66 | 6531 | finish_omp_atomic (enum tree_code code, enum tree_code opcode, tree lhs, |
acf0174b | 6532 | tree rhs, tree v, tree lhs1, tree rhs1, bool seq_cst) |
1799e5d5 | 6533 | { |
239371f9 JJ |
6534 | tree orig_lhs; |
6535 | tree orig_rhs; | |
20906c66 JJ |
6536 | tree orig_v; |
6537 | tree orig_lhs1; | |
6538 | tree orig_rhs1; | |
239371f9 | 6539 | bool dependent_p; |
e6bd5565 MM |
6540 | tree stmt; |
6541 | ||
239371f9 JJ |
6542 | orig_lhs = lhs; |
6543 | orig_rhs = rhs; | |
20906c66 JJ |
6544 | orig_v = v; |
6545 | orig_lhs1 = lhs1; | |
6546 | orig_rhs1 = rhs1; | |
239371f9 JJ |
6547 | dependent_p = false; |
6548 | stmt = NULL_TREE; | |
6549 | ||
6550 | /* Even in a template, we can detect invalid uses of the atomic | |
6551 | pragma if neither LHS nor RHS is type-dependent. */ | |
6552 | if (processing_template_decl) | |
e6bd5565 | 6553 | { |
239371f9 | 6554 | dependent_p = (type_dependent_expression_p (lhs) |
20906c66 JJ |
6555 | || (rhs && type_dependent_expression_p (rhs)) |
6556 | || (v && type_dependent_expression_p (v)) | |
6557 | || (lhs1 && type_dependent_expression_p (lhs1)) | |
6558 | || (rhs1 && type_dependent_expression_p (rhs1))); | |
239371f9 | 6559 | if (!dependent_p) |
e6bd5565 MM |
6560 | { |
6561 | lhs = build_non_dependent_expr (lhs); | |
20906c66 JJ |
6562 | if (rhs) |
6563 | rhs = build_non_dependent_expr (rhs); | |
6564 | if (v) | |
6565 | v = build_non_dependent_expr (v); | |
6566 | if (lhs1) | |
6567 | lhs1 = build_non_dependent_expr (lhs1); | |
6568 | if (rhs1) | |
6569 | rhs1 = build_non_dependent_expr (rhs1); | |
e6bd5565 | 6570 | } |
239371f9 JJ |
6571 | } |
6572 | if (!dependent_p) | |
6573 | { | |
acf0174b JJ |
6574 | bool swapped = false; |
6575 | if (rhs1 && cp_tree_equal (lhs, rhs)) | |
6576 | { | |
6577 | tree tem = rhs; | |
6578 | rhs = rhs1; | |
6579 | rhs1 = tem; | |
6580 | swapped = !commutative_tree_code (opcode); | |
6581 | } | |
6582 | if (rhs1 && !cp_tree_equal (lhs, rhs1)) | |
6583 | { | |
6584 | if (code == OMP_ATOMIC) | |
6585 | error ("%<#pragma omp atomic update%> uses two different " | |
6586 | "expressions for memory"); | |
6587 | else | |
6588 | error ("%<#pragma omp atomic capture%> uses two different " | |
6589 | "expressions for memory"); | |
6590 | return; | |
6591 | } | |
6592 | if (lhs1 && !cp_tree_equal (lhs, lhs1)) | |
6593 | { | |
6594 | if (code == OMP_ATOMIC) | |
6595 | error ("%<#pragma omp atomic update%> uses two different " | |
6596 | "expressions for memory"); | |
6597 | else | |
6598 | error ("%<#pragma omp atomic capture%> uses two different " | |
6599 | "expressions for memory"); | |
6600 | return; | |
6601 | } | |
20906c66 | 6602 | stmt = c_finish_omp_atomic (input_location, code, opcode, lhs, rhs, |
acf0174b | 6603 | v, lhs1, rhs1, swapped, seq_cst); |
239371f9 JJ |
6604 | if (stmt == error_mark_node) |
6605 | return; | |
e6bd5565 | 6606 | } |
239371f9 | 6607 | if (processing_template_decl) |
20906c66 JJ |
6608 | { |
6609 | if (code == OMP_ATOMIC_READ) | |
6610 | { | |
f330f599 PC |
6611 | stmt = build_min_nt_loc (EXPR_LOCATION (orig_lhs), |
6612 | OMP_ATOMIC_READ, orig_lhs); | |
acf0174b | 6613 | OMP_ATOMIC_SEQ_CST (stmt) = seq_cst; |
20906c66 JJ |
6614 | stmt = build2 (MODIFY_EXPR, void_type_node, orig_v, stmt); |
6615 | } | |
6616 | else | |
6617 | { | |
6618 | if (opcode == NOP_EXPR) | |
6619 | stmt = build2 (MODIFY_EXPR, void_type_node, orig_lhs, orig_rhs); | |
6620 | else | |
6621 | stmt = build2 (opcode, void_type_node, orig_lhs, orig_rhs); | |
6622 | if (orig_rhs1) | |
f330f599 PC |
6623 | stmt = build_min_nt_loc (EXPR_LOCATION (orig_rhs1), |
6624 | COMPOUND_EXPR, orig_rhs1, stmt); | |
20906c66 JJ |
6625 | if (code != OMP_ATOMIC) |
6626 | { | |
f330f599 PC |
6627 | stmt = build_min_nt_loc (EXPR_LOCATION (orig_lhs1), |
6628 | code, orig_lhs1, stmt); | |
acf0174b | 6629 | OMP_ATOMIC_SEQ_CST (stmt) = seq_cst; |
20906c66 JJ |
6630 | stmt = build2 (MODIFY_EXPR, void_type_node, orig_v, stmt); |
6631 | } | |
6632 | } | |
6633 | stmt = build2 (OMP_ATOMIC, void_type_node, integer_zero_node, stmt); | |
acf0174b | 6634 | OMP_ATOMIC_SEQ_CST (stmt) = seq_cst; |
20906c66 | 6635 | } |
e3f505d8 | 6636 | finish_expr_stmt (stmt); |
1799e5d5 RH |
6637 | } |
6638 | ||
6639 | void | |
6640 | finish_omp_barrier (void) | |
6641 | { | |
e79983f4 | 6642 | tree fn = builtin_decl_explicit (BUILT_IN_GOMP_BARRIER); |
9771b263 | 6643 | vec<tree, va_gc> *vec = make_tree_vector (); |
c166b898 ILT |
6644 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); |
6645 | release_tree_vector (vec); | |
1799e5d5 RH |
6646 | finish_expr_stmt (stmt); |
6647 | } | |
6648 | ||
6649 | void | |
6650 | finish_omp_flush (void) | |
6651 | { | |
e79983f4 | 6652 | tree fn = builtin_decl_explicit (BUILT_IN_SYNC_SYNCHRONIZE); |
9771b263 | 6653 | vec<tree, va_gc> *vec = make_tree_vector (); |
c166b898 ILT |
6654 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); |
6655 | release_tree_vector (vec); | |
1799e5d5 RH |
6656 | finish_expr_stmt (stmt); |
6657 | } | |
6658 | ||
a68ab351 JJ |
6659 | void |
6660 | finish_omp_taskwait (void) | |
1799e5d5 | 6661 | { |
e79983f4 | 6662 | tree fn = builtin_decl_explicit (BUILT_IN_GOMP_TASKWAIT); |
9771b263 | 6663 | vec<tree, va_gc> *vec = make_tree_vector (); |
c166b898 ILT |
6664 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); |
6665 | release_tree_vector (vec); | |
a68ab351 | 6666 | finish_expr_stmt (stmt); |
1799e5d5 | 6667 | } |
20906c66 JJ |
6668 | |
6669 | void | |
6670 | finish_omp_taskyield (void) | |
6671 | { | |
e79983f4 | 6672 | tree fn = builtin_decl_explicit (BUILT_IN_GOMP_TASKYIELD); |
9771b263 | 6673 | vec<tree, va_gc> *vec = make_tree_vector (); |
20906c66 JJ |
6674 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); |
6675 | release_tree_vector (vec); | |
6676 | finish_expr_stmt (stmt); | |
6677 | } | |
acf0174b JJ |
6678 | |
6679 | void | |
6680 | finish_omp_cancel (tree clauses) | |
6681 | { | |
6682 | tree fn = builtin_decl_explicit (BUILT_IN_GOMP_CANCEL); | |
6683 | int mask = 0; | |
6684 | if (find_omp_clause (clauses, OMP_CLAUSE_PARALLEL)) | |
6685 | mask = 1; | |
6686 | else if (find_omp_clause (clauses, OMP_CLAUSE_FOR)) | |
6687 | mask = 2; | |
6688 | else if (find_omp_clause (clauses, OMP_CLAUSE_SECTIONS)) | |
6689 | mask = 4; | |
6690 | else if (find_omp_clause (clauses, OMP_CLAUSE_TASKGROUP)) | |
6691 | mask = 8; | |
6692 | else | |
6693 | { | |
6694 | error ("%<#pragma omp cancel must specify one of " | |
6695 | "%<parallel%>, %<for%>, %<sections%> or %<taskgroup%> clauses"); | |
6696 | return; | |
6697 | } | |
6698 | vec<tree, va_gc> *vec = make_tree_vector (); | |
6699 | tree ifc = find_omp_clause (clauses, OMP_CLAUSE_IF); | |
6700 | if (ifc != NULL_TREE) | |
6701 | { | |
6702 | tree type = TREE_TYPE (OMP_CLAUSE_IF_EXPR (ifc)); | |
6703 | ifc = fold_build2_loc (OMP_CLAUSE_LOCATION (ifc), NE_EXPR, | |
6704 | boolean_type_node, OMP_CLAUSE_IF_EXPR (ifc), | |
6705 | build_zero_cst (type)); | |
6706 | } | |
6707 | else | |
6708 | ifc = boolean_true_node; | |
6709 | vec->quick_push (build_int_cst (integer_type_node, mask)); | |
6710 | vec->quick_push (ifc); | |
6711 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); | |
6712 | release_tree_vector (vec); | |
6713 | finish_expr_stmt (stmt); | |
6714 | } | |
6715 | ||
6716 | void | |
6717 | finish_omp_cancellation_point (tree clauses) | |
6718 | { | |
6719 | tree fn = builtin_decl_explicit (BUILT_IN_GOMP_CANCELLATION_POINT); | |
6720 | int mask = 0; | |
6721 | if (find_omp_clause (clauses, OMP_CLAUSE_PARALLEL)) | |
6722 | mask = 1; | |
6723 | else if (find_omp_clause (clauses, OMP_CLAUSE_FOR)) | |
6724 | mask = 2; | |
6725 | else if (find_omp_clause (clauses, OMP_CLAUSE_SECTIONS)) | |
6726 | mask = 4; | |
6727 | else if (find_omp_clause (clauses, OMP_CLAUSE_TASKGROUP)) | |
6728 | mask = 8; | |
6729 | else | |
6730 | { | |
6731 | error ("%<#pragma omp cancellation point must specify one of " | |
6732 | "%<parallel%>, %<for%>, %<sections%> or %<taskgroup%> clauses"); | |
6733 | return; | |
6734 | } | |
6735 | vec<tree, va_gc> *vec | |
6736 | = make_tree_vector_single (build_int_cst (integer_type_node, mask)); | |
6737 | tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error); | |
6738 | release_tree_vector (vec); | |
6739 | finish_expr_stmt (stmt); | |
6740 | } | |
1799e5d5 | 6741 | \f |
0a35513e AH |
6742 | /* Begin a __transaction_atomic or __transaction_relaxed statement. |
6743 | If PCOMPOUND is non-null, this is for a function-transaction-block, and we | |
6744 | should create an extra compound stmt. */ | |
6745 | ||
6746 | tree | |
6747 | begin_transaction_stmt (location_t loc, tree *pcompound, int flags) | |
6748 | { | |
6749 | tree r; | |
6750 | ||
6751 | if (pcompound) | |
6752 | *pcompound = begin_compound_stmt (0); | |
6753 | ||
6754 | r = build_stmt (loc, TRANSACTION_EXPR, NULL_TREE); | |
6755 | ||
6756 | /* Only add the statement to the function if support enabled. */ | |
6757 | if (flag_tm) | |
6758 | add_stmt (r); | |
6759 | else | |
6760 | error_at (loc, ((flags & TM_STMT_ATTR_RELAXED) != 0 | |
6761 | ? G_("%<__transaction_relaxed%> without " | |
6762 | "transactional memory support enabled") | |
6763 | : G_("%<__transaction_atomic%> without " | |
6764 | "transactional memory support enabled"))); | |
6765 | ||
6766 | TRANSACTION_EXPR_BODY (r) = push_stmt_list (); | |
6f2d959b | 6767 | TREE_SIDE_EFFECTS (r) = 1; |
0a35513e AH |
6768 | return r; |
6769 | } | |
6770 | ||
6771 | /* End a __transaction_atomic or __transaction_relaxed statement. | |
6772 | If COMPOUND_STMT is non-null, this is for a function-transaction-block, | |
f0f3286a TR |
6773 | and we should end the compound. If NOEX is non-NULL, we wrap the body in |
6774 | a MUST_NOT_THROW_EXPR with NOEX as condition. */ | |
0a35513e AH |
6775 | |
6776 | void | |
f0f3286a | 6777 | finish_transaction_stmt (tree stmt, tree compound_stmt, int flags, tree noex) |
0a35513e AH |
6778 | { |
6779 | TRANSACTION_EXPR_BODY (stmt) = pop_stmt_list (TRANSACTION_EXPR_BODY (stmt)); | |
6780 | TRANSACTION_EXPR_OUTER (stmt) = (flags & TM_STMT_ATTR_OUTER) != 0; | |
6781 | TRANSACTION_EXPR_RELAXED (stmt) = (flags & TM_STMT_ATTR_RELAXED) != 0; | |
6782 | TRANSACTION_EXPR_IS_STMT (stmt) = 1; | |
6783 | ||
f0f3286a TR |
6784 | /* noexcept specifications are not allowed for function transactions. */ |
6785 | gcc_assert (!(noex && compound_stmt)); | |
6786 | if (noex) | |
6787 | { | |
6788 | tree body = build_must_not_throw_expr (TRANSACTION_EXPR_BODY (stmt), | |
6789 | noex); | |
550dfe7f MP |
6790 | /* This may not be true when the STATEMENT_LIST is empty. */ |
6791 | if (EXPR_P (body)) | |
6792 | SET_EXPR_LOCATION (body, EXPR_LOCATION (TRANSACTION_EXPR_BODY (stmt))); | |
f0f3286a TR |
6793 | TREE_SIDE_EFFECTS (body) = 1; |
6794 | TRANSACTION_EXPR_BODY (stmt) = body; | |
6795 | } | |
6796 | ||
0a35513e AH |
6797 | if (compound_stmt) |
6798 | finish_compound_stmt (compound_stmt); | |
0a35513e AH |
6799 | } |
6800 | ||
f0f3286a TR |
6801 | /* Build a __transaction_atomic or __transaction_relaxed expression. If |
6802 | NOEX is non-NULL, we wrap the body in a MUST_NOT_THROW_EXPR with NOEX as | |
6803 | condition. */ | |
0a35513e AH |
6804 | |
6805 | tree | |
f0f3286a | 6806 | build_transaction_expr (location_t loc, tree expr, int flags, tree noex) |
0a35513e AH |
6807 | { |
6808 | tree ret; | |
f0f3286a TR |
6809 | if (noex) |
6810 | { | |
6811 | expr = build_must_not_throw_expr (expr, noex); | |
830ce0a2 MP |
6812 | if (EXPR_P (expr)) |
6813 | SET_EXPR_LOCATION (expr, loc); | |
f0f3286a TR |
6814 | TREE_SIDE_EFFECTS (expr) = 1; |
6815 | } | |
0a35513e AH |
6816 | ret = build1 (TRANSACTION_EXPR, TREE_TYPE (expr), expr); |
6817 | if (flags & TM_STMT_ATTR_RELAXED) | |
6818 | TRANSACTION_EXPR_RELAXED (ret) = 1; | |
6f2d959b | 6819 | TREE_SIDE_EFFECTS (ret) = 1; |
0a35513e AH |
6820 | SET_EXPR_LOCATION (ret, loc); |
6821 | return ret; | |
6822 | } | |
6823 | \f | |
54f7877c | 6824 | void |
3a978d72 | 6825 | init_cp_semantics (void) |
54f7877c | 6826 | { |
54f7877c | 6827 | } |
55a3debe DG |
6828 | \f |
6829 | /* Build a STATIC_ASSERT for a static assertion with the condition | |
6830 | CONDITION and the message text MESSAGE. LOCATION is the location | |
6831 | of the static assertion in the source code. When MEMBER_P, this | |
6832 | static assertion is a member of a class. */ | |
6833 | void | |
6834 | finish_static_assert (tree condition, tree message, location_t location, | |
6835 | bool member_p) | |
6836 | { | |
61b6d4cd DS |
6837 | if (message == NULL_TREE |
6838 | || message == error_mark_node | |
6839 | || condition == NULL_TREE | |
6840 | || condition == error_mark_node) | |
6841 | return; | |
6842 | ||
7b3e2d46 DG |
6843 | if (check_for_bare_parameter_packs (condition)) |
6844 | condition = error_mark_node; | |
6845 | ||
55a3debe DG |
6846 | if (type_dependent_expression_p (condition) |
6847 | || value_dependent_expression_p (condition)) | |
6848 | { | |
6849 | /* We're in a template; build a STATIC_ASSERT and put it in | |
6850 | the right place. */ | |
6851 | tree assertion; | |
6852 | ||
6853 | assertion = make_node (STATIC_ASSERT); | |
6854 | STATIC_ASSERT_CONDITION (assertion) = condition; | |
6855 | STATIC_ASSERT_MESSAGE (assertion) = message; | |
6856 | STATIC_ASSERT_SOURCE_LOCATION (assertion) = location; | |
6857 | ||
6858 | if (member_p) | |
6859 | maybe_add_class_template_decl_list (current_class_type, | |
6860 | assertion, | |
6861 | /*friend_p=*/0); | |
6862 | else | |
6863 | add_stmt (assertion); | |
6864 | ||
6865 | return; | |
6866 | } | |
6867 | ||
6868 | /* Fold the expression and convert it to a boolean value. */ | |
6869 | condition = fold_non_dependent_expr (condition); | |
4b978f96 | 6870 | condition = cp_convert (boolean_type_node, condition, tf_warning_or_error); |
fa2200cb | 6871 | condition = maybe_constant_value (condition); |
55a3debe DG |
6872 | |
6873 | if (TREE_CODE (condition) == INTEGER_CST && !integer_zerop (condition)) | |
6874 | /* Do nothing; the condition is satisfied. */ | |
6875 | ; | |
6876 | else | |
6877 | { | |
6878 | location_t saved_loc = input_location; | |
6879 | ||
6880 | input_location = location; | |
6881 | if (TREE_CODE (condition) == INTEGER_CST | |
6882 | && integer_zerop (condition)) | |
6883 | /* Report the error. */ | |
32210fd6 | 6884 | error ("static assertion failed: %s", TREE_STRING_POINTER (message)); |
55a3debe | 6885 | else if (condition && condition != error_mark_node) |
fa2200cb JM |
6886 | { |
6887 | error ("non-constant condition for static assertion"); | |
9299bde0 PC |
6888 | if (require_potential_rvalue_constant_expression (condition)) |
6889 | cxx_constant_value (condition); | |
fa2200cb | 6890 | } |
55a3debe DG |
6891 | input_location = saved_loc; |
6892 | } | |
6893 | } | |
3ad6a8e1 DG |
6894 | \f |
6895 | /* Implements the C++0x decltype keyword. Returns the type of EXPR, | |
6896 | suitable for use as a type-specifier. | |
6897 | ||
6898 | ID_EXPRESSION_OR_MEMBER_ACCESS_P is true when EXPR was parsed as an | |
6899 | id-expression or a class member access, FALSE when it was parsed as | |
6900 | a full expression. */ | |
a77f94e2 | 6901 | |
3ad6a8e1 | 6902 | tree |
5b97c77f JM |
6903 | finish_decltype_type (tree expr, bool id_expression_or_member_access_p, |
6904 | tsubst_flags_t complain) | |
3ad6a8e1 | 6905 | { |
056dd1af | 6906 | tree type = NULL_TREE; |
3ad6a8e1 | 6907 | |
e4fd5b87 DG |
6908 | if (!expr || error_operand_p (expr)) |
6909 | return error_mark_node; | |
6910 | ||
7a547b93 JJ |
6911 | if (TYPE_P (expr) |
6912 | || TREE_CODE (expr) == TYPE_DECL | |
6913 | || (TREE_CODE (expr) == BIT_NOT_EXPR | |
6914 | && TYPE_P (TREE_OPERAND (expr, 0)))) | |
6915 | { | |
5b97c77f JM |
6916 | if (complain & tf_error) |
6917 | error ("argument to decltype must be an expression"); | |
7a547b93 JJ |
6918 | return error_mark_node; |
6919 | } | |
6920 | ||
2c905502 JM |
6921 | /* Depending on the resolution of DR 1172, we may later need to distinguish |
6922 | instantiation-dependent but not type-dependent expressions so that, say, | |
6923 | A<decltype(sizeof(T))>::U doesn't require 'typename'. */ | |
6924 | if (instantiation_dependent_expression_p (expr)) | |
3ad6a8e1 | 6925 | { |
9e1e64ec | 6926 | type = cxx_make_type (DECLTYPE_TYPE); |
3ad6a8e1 DG |
6927 | DECLTYPE_TYPE_EXPR (type) = expr; |
6928 | DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P (type) | |
6929 | = id_expression_or_member_access_p; | |
6930 | SET_TYPE_STRUCTURAL_EQUALITY (type); | |
6931 | ||
6932 | return type; | |
6933 | } | |
6934 | ||
6935 | /* The type denoted by decltype(e) is defined as follows: */ | |
6936 | ||
ccb05613 | 6937 | expr = resolve_nondeduced_context (expr); |
48326487 | 6938 | |
6c74ff23 JM |
6939 | if (invalid_nonstatic_memfn_p (expr, complain)) |
6940 | return error_mark_node; | |
6941 | ||
6cdb1428 JM |
6942 | if (type_unknown_p (expr)) |
6943 | { | |
6944 | if (complain & tf_error) | |
6945 | error ("decltype cannot resolve address of overloaded function"); | |
6946 | return error_mark_node; | |
6947 | } | |
6948 | ||
48326487 JM |
6949 | /* To get the size of a static data member declared as an array of |
6950 | unknown bound, we need to instantiate it. */ | |
5a6ccc94 | 6951 | if (VAR_P (expr) |
48326487 JM |
6952 | && VAR_HAD_UNKNOWN_BOUND (expr) |
6953 | && DECL_TEMPLATE_INSTANTIATION (expr)) | |
6954 | instantiate_decl (expr, /*defer_ok*/true, /*expl_inst_mem*/false); | |
6955 | ||
3ad6a8e1 DG |
6956 | if (id_expression_or_member_access_p) |
6957 | { | |
6958 | /* If e is an id-expression or a class member access (5.2.5 | |
6959 | [expr.ref]), decltype(e) is defined as the type of the entity | |
6960 | named by e. If there is no such entity, or e names a set of | |
6961 | overloaded functions, the program is ill-formed. */ | |
9dc6f476 | 6962 | if (identifier_p (expr)) |
3ad6a8e1 DG |
6963 | expr = lookup_name (expr); |
6964 | ||
591cb3cf | 6965 | if (INDIRECT_REF_P (expr)) |
3ad6a8e1 DG |
6966 | /* This can happen when the expression is, e.g., "a.b". Just |
6967 | look at the underlying operand. */ | |
6968 | expr = TREE_OPERAND (expr, 0); | |
6969 | ||
6970 | if (TREE_CODE (expr) == OFFSET_REF | |
cf3c30d3 JM |
6971 | || TREE_CODE (expr) == MEMBER_REF |
6972 | || TREE_CODE (expr) == SCOPE_REF) | |
3ad6a8e1 DG |
6973 | /* We're only interested in the field itself. If it is a |
6974 | BASELINK, we will need to see through it in the next | |
6975 | step. */ | |
6976 | expr = TREE_OPERAND (expr, 1); | |
6977 | ||
c5ce25ce | 6978 | if (BASELINK_P (expr)) |
6cdb1428 | 6979 | /* See through BASELINK nodes to the underlying function. */ |
3ad6a8e1 DG |
6980 | expr = BASELINK_FUNCTIONS (expr); |
6981 | ||
3ad6a8e1 DG |
6982 | switch (TREE_CODE (expr)) |
6983 | { | |
6984 | case FIELD_DECL: | |
e76d7cc7 | 6985 | if (DECL_BIT_FIELD_TYPE (expr)) |
3ad6a8e1 DG |
6986 | { |
6987 | type = DECL_BIT_FIELD_TYPE (expr); | |
6988 | break; | |
6989 | } | |
6990 | /* Fall through for fields that aren't bitfields. */ | |
6991 | ||
6992 | case FUNCTION_DECL: | |
6993 | case VAR_DECL: | |
6994 | case CONST_DECL: | |
6995 | case PARM_DECL: | |
6996 | case RESULT_DECL: | |
088d4f95 | 6997 | case TEMPLATE_PARM_INDEX: |
03a904b5 | 6998 | expr = mark_type_use (expr); |
3ad6a8e1 DG |
6999 | type = TREE_TYPE (expr); |
7000 | break; | |
7001 | ||
7002 | case ERROR_MARK: | |
7003 | type = error_mark_node; | |
7004 | break; | |
7005 | ||
7006 | case COMPONENT_REF: | |
4882d82a | 7007 | case COMPOUND_EXPR: |
03a904b5 | 7008 | mark_type_use (expr); |
3ad6a8e1 DG |
7009 | type = is_bitfield_expr_with_lowered_type (expr); |
7010 | if (!type) | |
7011 | type = TREE_TYPE (TREE_OPERAND (expr, 1)); | |
7012 | break; | |
7013 | ||
7014 | case BIT_FIELD_REF: | |
7015 | gcc_unreachable (); | |
7016 | ||
7017 | case INTEGER_CST: | |
8733916b | 7018 | case PTRMEM_CST: |
3ad6a8e1 | 7019 | /* We can get here when the id-expression refers to an |
8733916b | 7020 | enumerator or non-type template parameter. */ |
3ad6a8e1 DG |
7021 | type = TREE_TYPE (expr); |
7022 | break; | |
7023 | ||
7024 | default: | |
57c16a5e PC |
7025 | /* Handle instantiated template non-type arguments. */ |
7026 | type = TREE_TYPE (expr); | |
7027 | break; | |
3ad6a8e1 DG |
7028 | } |
7029 | } | |
7030 | else | |
7031 | { | |
c1e41527 JM |
7032 | /* Within a lambda-expression: |
7033 | ||
7034 | Every occurrence of decltype((x)) where x is a possibly | |
7035 | parenthesized id-expression that names an entity of | |
7036 | automatic storage duration is treated as if x were | |
7037 | transformed into an access to a corresponding data member | |
7038 | of the closure type that would have been declared if x | |
7039 | were a use of the denoted entity. */ | |
7040 | if (outer_automatic_var_p (expr) | |
7041 | && current_function_decl | |
7042 | && LAMBDA_FUNCTION_P (current_function_decl)) | |
7043 | type = capture_decltype (expr); | |
7044 | else if (error_operand_p (expr)) | |
7045 | type = error_mark_node; | |
7046 | else if (expr == current_class_ptr) | |
7047 | /* If the expression is just "this", we want the | |
7048 | cv-unqualified pointer for the "this" type. */ | |
7049 | type = TYPE_MAIN_VARIANT (TREE_TYPE (expr)); | |
7050 | else | |
7051 | { | |
7052 | /* Otherwise, where T is the type of e, if e is an lvalue, | |
7053 | decltype(e) is defined as T&; if an xvalue, T&&; otherwise, T. */ | |
7054 | cp_lvalue_kind clk = lvalue_kind (expr); | |
7055 | type = unlowered_expr_type (expr); | |
7056 | gcc_assert (TREE_CODE (type) != REFERENCE_TYPE); | |
7cea661c MG |
7057 | |
7058 | /* For vector types, pick a non-opaque variant. */ | |
7059 | if (TREE_CODE (type) == VECTOR_TYPE) | |
7060 | type = strip_typedefs (type); | |
7061 | ||
c1e41527 JM |
7062 | if (clk != clk_none && !(clk & clk_class)) |
7063 | type = cp_build_reference_type (type, (clk & clk_rvalueref)); | |
7064 | } | |
3ad6a8e1 DG |
7065 | } |
7066 | ||
e4276ba5 | 7067 | if (cxx_dialect >= cxx14 && array_of_runtime_bound_p (type) |
b75bf8b1 | 7068 | && (flag_iso || warn_vla > 0)) |
a57dbdaa JM |
7069 | { |
7070 | if (complain & tf_warning_or_error) | |
7071 | pedwarn (input_location, OPT_Wvla, | |
7072 | "taking decltype of array of runtime bound"); | |
7073 | else | |
7074 | return error_mark_node; | |
7075 | } | |
7076 | ||
3ad6a8e1 DG |
7077 | return type; |
7078 | } | |
cf22909c | 7079 | |
b29441ec PC |
7080 | /* Called from trait_expr_value to evaluate either __has_nothrow_assign or |
7081 | __has_nothrow_copy, depending on assign_p. */ | |
cb68ec50 PC |
7082 | |
7083 | static bool | |
b29441ec | 7084 | classtype_has_nothrow_assign_or_copy_p (tree type, bool assign_p) |
cb68ec50 | 7085 | { |
b29441ec | 7086 | tree fns; |
cb68ec50 | 7087 | |
b29441ec PC |
7088 | if (assign_p) |
7089 | { | |
7090 | int ix; | |
7091 | ix = lookup_fnfields_1 (type, ansi_assopname (NOP_EXPR)); | |
7092 | if (ix < 0) | |
cb68ec50 | 7093 | return false; |
9771b263 | 7094 | fns = (*CLASSTYPE_METHOD_VEC (type))[ix]; |
b29441ec | 7095 | } |
066ec0a4 | 7096 | else if (TYPE_HAS_COPY_CTOR (type)) |
b29441ec PC |
7097 | { |
7098 | /* If construction of the copy constructor was postponed, create | |
7099 | it now. */ | |
7100 | if (CLASSTYPE_LAZY_COPY_CTOR (type)) | |
7101 | lazily_declare_fn (sfk_copy_constructor, type); | |
d5f4eddd JM |
7102 | if (CLASSTYPE_LAZY_MOVE_CTOR (type)) |
7103 | lazily_declare_fn (sfk_move_constructor, type); | |
b29441ec | 7104 | fns = CLASSTYPE_CONSTRUCTORS (type); |
cb68ec50 PC |
7105 | } |
7106 | else | |
7107 | return false; | |
7108 | ||
b29441ec | 7109 | for (; fns; fns = OVL_NEXT (fns)) |
279086c3 PC |
7110 | { |
7111 | tree fn = OVL_CURRENT (fns); | |
7112 | ||
7113 | if (assign_p) | |
7114 | { | |
7115 | if (copy_fn_p (fn) == 0) | |
7116 | continue; | |
7117 | } | |
7118 | else if (copy_fn_p (fn) <= 0) | |
7119 | continue; | |
7120 | ||
ba9146c1 | 7121 | maybe_instantiate_noexcept (fn); |
279086c3 PC |
7122 | if (!TYPE_NOTHROW_P (TREE_TYPE (fn))) |
7123 | return false; | |
7124 | } | |
b29441ec | 7125 | |
cb68ec50 PC |
7126 | return true; |
7127 | } | |
7128 | ||
7129 | /* Actually evaluates the trait. */ | |
7130 | ||
7131 | static bool | |
7132 | trait_expr_value (cp_trait_kind kind, tree type1, tree type2) | |
7133 | { | |
7134 | enum tree_code type_code1; | |
7135 | tree t; | |
7136 | ||
7137 | type_code1 = TREE_CODE (type1); | |
7138 | ||
7139 | switch (kind) | |
7140 | { | |
7141 | case CPTK_HAS_NOTHROW_ASSIGN: | |
c32097d8 | 7142 | type1 = strip_array_types (type1); |
b29441ec PC |
7143 | return (!CP_TYPE_CONST_P (type1) && type_code1 != REFERENCE_TYPE |
7144 | && (trait_expr_value (CPTK_HAS_TRIVIAL_ASSIGN, type1, type2) | |
7145 | || (CLASS_TYPE_P (type1) | |
7146 | && classtype_has_nothrow_assign_or_copy_p (type1, | |
7147 | true)))); | |
cb68ec50 PC |
7148 | |
7149 | case CPTK_HAS_TRIVIAL_ASSIGN: | |
c32097d8 JM |
7150 | /* ??? The standard seems to be missing the "or array of such a class |
7151 | type" wording for this trait. */ | |
7152 | type1 = strip_array_types (type1); | |
cb68ec50 | 7153 | return (!CP_TYPE_CONST_P (type1) && type_code1 != REFERENCE_TYPE |
c32097d8 | 7154 | && (trivial_type_p (type1) |
cb68ec50 | 7155 | || (CLASS_TYPE_P (type1) |
066ec0a4 | 7156 | && TYPE_HAS_TRIVIAL_COPY_ASSIGN (type1)))); |
cb68ec50 PC |
7157 | |
7158 | case CPTK_HAS_NOTHROW_CONSTRUCTOR: | |
7159 | type1 = strip_array_types (type1); | |
7160 | return (trait_expr_value (CPTK_HAS_TRIVIAL_CONSTRUCTOR, type1, type2) | |
7161 | || (CLASS_TYPE_P (type1) | |
ac177431 | 7162 | && (t = locate_ctor (type1)) |
ffabb761 JM |
7163 | && (maybe_instantiate_noexcept (t), |
7164 | TYPE_NOTHROW_P (TREE_TYPE (t))))); | |
cb68ec50 PC |
7165 | |
7166 | case CPTK_HAS_TRIVIAL_CONSTRUCTOR: | |
7167 | type1 = strip_array_types (type1); | |
c32097d8 | 7168 | return (trivial_type_p (type1) |
cb68ec50 PC |
7169 | || (CLASS_TYPE_P (type1) && TYPE_HAS_TRIVIAL_DFLT (type1))); |
7170 | ||
7171 | case CPTK_HAS_NOTHROW_COPY: | |
c32097d8 | 7172 | type1 = strip_array_types (type1); |
cb68ec50 PC |
7173 | return (trait_expr_value (CPTK_HAS_TRIVIAL_COPY, type1, type2) |
7174 | || (CLASS_TYPE_P (type1) | |
b29441ec | 7175 | && classtype_has_nothrow_assign_or_copy_p (type1, false))); |
cb68ec50 PC |
7176 | |
7177 | case CPTK_HAS_TRIVIAL_COPY: | |
c32097d8 JM |
7178 | /* ??? The standard seems to be missing the "or array of such a class |
7179 | type" wording for this trait. */ | |
7180 | type1 = strip_array_types (type1); | |
7181 | return (trivial_type_p (type1) || type_code1 == REFERENCE_TYPE | |
066ec0a4 | 7182 | || (CLASS_TYPE_P (type1) && TYPE_HAS_TRIVIAL_COPY_CTOR (type1))); |
cb68ec50 PC |
7183 | |
7184 | case CPTK_HAS_TRIVIAL_DESTRUCTOR: | |
7185 | type1 = strip_array_types (type1); | |
c32097d8 | 7186 | return (trivial_type_p (type1) || type_code1 == REFERENCE_TYPE |
cb68ec50 PC |
7187 | || (CLASS_TYPE_P (type1) |
7188 | && TYPE_HAS_TRIVIAL_DESTRUCTOR (type1))); | |
7189 | ||
7190 | case CPTK_HAS_VIRTUAL_DESTRUCTOR: | |
46408846 | 7191 | return type_has_virtual_destructor (type1); |
cb68ec50 PC |
7192 | |
7193 | case CPTK_IS_ABSTRACT: | |
94ccc95d | 7194 | return (ABSTRACT_CLASS_TYPE_P (type1)); |
cb68ec50 PC |
7195 | |
7196 | case CPTK_IS_BASE_OF: | |
7197 | return (NON_UNION_CLASS_TYPE_P (type1) && NON_UNION_CLASS_TYPE_P (type2) | |
1f872df7 PC |
7198 | && (same_type_ignoring_top_level_qualifiers_p (type1, type2) |
7199 | || DERIVED_FROM_P (type1, type2))); | |
cb68ec50 PC |
7200 | |
7201 | case CPTK_IS_CLASS: | |
7202 | return (NON_UNION_CLASS_TYPE_P (type1)); | |
7203 | ||
7204 | case CPTK_IS_CONVERTIBLE_TO: | |
7205 | /* TODO */ | |
7206 | return false; | |
7207 | ||
7208 | case CPTK_IS_EMPTY: | |
7209 | return (NON_UNION_CLASS_TYPE_P (type1) && CLASSTYPE_EMPTY_P (type1)); | |
7210 | ||
7211 | case CPTK_IS_ENUM: | |
7212 | return (type_code1 == ENUMERAL_TYPE); | |
7213 | ||
b3908fcc JW |
7214 | case CPTK_IS_FINAL: |
7215 | return (CLASS_TYPE_P (type1) && CLASSTYPE_FINAL (type1)); | |
7216 | ||
3c0d13bf PC |
7217 | case CPTK_IS_LITERAL_TYPE: |
7218 | return (literal_type_p (type1)); | |
7219 | ||
cb68ec50 PC |
7220 | case CPTK_IS_POD: |
7221 | return (pod_type_p (type1)); | |
7222 | ||
7223 | case CPTK_IS_POLYMORPHIC: | |
7224 | return (CLASS_TYPE_P (type1) && TYPE_POLYMORPHIC_P (type1)); | |
7225 | ||
c32097d8 JM |
7226 | case CPTK_IS_STD_LAYOUT: |
7227 | return (std_layout_type_p (type1)); | |
7228 | ||
7229 | case CPTK_IS_TRIVIAL: | |
7230 | return (trivial_type_p (type1)); | |
7231 | ||
cb68ec50 PC |
7232 | case CPTK_IS_UNION: |
7233 | return (type_code1 == UNION_TYPE); | |
7234 | ||
7235 | default: | |
7236 | gcc_unreachable (); | |
7237 | return false; | |
7238 | } | |
7239 | } | |
7240 | ||
4f75413f PC |
7241 | /* If TYPE is an array of unknown bound, or (possibly cv-qualified) |
7242 | void, or a complete type, returns it, otherwise NULL_TREE. */ | |
ff284b4b | 7243 | |
4f75413f | 7244 | static tree |
ff284b4b PC |
7245 | check_trait_type (tree type) |
7246 | { | |
f94ae987 JM |
7247 | if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type) |
7248 | && COMPLETE_TYPE_P (TREE_TYPE (type))) | |
4f75413f | 7249 | return type; |
ff284b4b PC |
7250 | |
7251 | if (VOID_TYPE_P (type)) | |
4f75413f | 7252 | return type; |
ff284b4b | 7253 | |
4f75413f | 7254 | return complete_type_or_else (strip_array_types (type), NULL_TREE); |
ff284b4b PC |
7255 | } |
7256 | ||
cb68ec50 PC |
7257 | /* Process a trait expression. */ |
7258 | ||
7259 | tree | |
7260 | finish_trait_expr (cp_trait_kind kind, tree type1, tree type2) | |
7261 | { | |
7262 | gcc_assert (kind == CPTK_HAS_NOTHROW_ASSIGN | |
7263 | || kind == CPTK_HAS_NOTHROW_CONSTRUCTOR | |
7264 | || kind == CPTK_HAS_NOTHROW_COPY | |
7265 | || kind == CPTK_HAS_TRIVIAL_ASSIGN | |
7266 | || kind == CPTK_HAS_TRIVIAL_CONSTRUCTOR | |
7267 | || kind == CPTK_HAS_TRIVIAL_COPY | |
7268 | || kind == CPTK_HAS_TRIVIAL_DESTRUCTOR | |
7269 | || kind == CPTK_HAS_VIRTUAL_DESTRUCTOR | |
7270 | || kind == CPTK_IS_ABSTRACT | |
7271 | || kind == CPTK_IS_BASE_OF | |
7272 | || kind == CPTK_IS_CLASS | |
7273 | || kind == CPTK_IS_CONVERTIBLE_TO | |
7274 | || kind == CPTK_IS_EMPTY | |
7275 | || kind == CPTK_IS_ENUM | |
b3908fcc | 7276 | || kind == CPTK_IS_FINAL |
3c0d13bf | 7277 | || kind == CPTK_IS_LITERAL_TYPE |
cb68ec50 PC |
7278 | || kind == CPTK_IS_POD |
7279 | || kind == CPTK_IS_POLYMORPHIC | |
c32097d8 JM |
7280 | || kind == CPTK_IS_STD_LAYOUT |
7281 | || kind == CPTK_IS_TRIVIAL | |
cb68ec50 PC |
7282 | || kind == CPTK_IS_UNION); |
7283 | ||
7284 | if (kind == CPTK_IS_CONVERTIBLE_TO) | |
7285 | { | |
7286 | sorry ("__is_convertible_to"); | |
7287 | return error_mark_node; | |
7288 | } | |
7289 | ||
7290 | if (type1 == error_mark_node | |
7291 | || ((kind == CPTK_IS_BASE_OF || kind == CPTK_IS_CONVERTIBLE_TO) | |
7292 | && type2 == error_mark_node)) | |
7293 | return error_mark_node; | |
7294 | ||
7295 | if (processing_template_decl) | |
7296 | { | |
7297 | tree trait_expr = make_node (TRAIT_EXPR); | |
7298 | TREE_TYPE (trait_expr) = boolean_type_node; | |
7299 | TRAIT_EXPR_TYPE1 (trait_expr) = type1; | |
7300 | TRAIT_EXPR_TYPE2 (trait_expr) = type2; | |
7301 | TRAIT_EXPR_KIND (trait_expr) = kind; | |
7302 | return trait_expr; | |
7303 | } | |
7304 | ||
ff284b4b | 7305 | switch (kind) |
cb68ec50 | 7306 | { |
ff284b4b PC |
7307 | case CPTK_HAS_NOTHROW_ASSIGN: |
7308 | case CPTK_HAS_TRIVIAL_ASSIGN: | |
7309 | case CPTK_HAS_NOTHROW_CONSTRUCTOR: | |
7310 | case CPTK_HAS_TRIVIAL_CONSTRUCTOR: | |
7311 | case CPTK_HAS_NOTHROW_COPY: | |
7312 | case CPTK_HAS_TRIVIAL_COPY: | |
7313 | case CPTK_HAS_TRIVIAL_DESTRUCTOR: | |
7314 | case CPTK_HAS_VIRTUAL_DESTRUCTOR: | |
7315 | case CPTK_IS_ABSTRACT: | |
7316 | case CPTK_IS_EMPTY: | |
b3908fcc | 7317 | case CPTK_IS_FINAL: |
3c0d13bf | 7318 | case CPTK_IS_LITERAL_TYPE: |
ff284b4b PC |
7319 | case CPTK_IS_POD: |
7320 | case CPTK_IS_POLYMORPHIC: | |
c32097d8 JM |
7321 | case CPTK_IS_STD_LAYOUT: |
7322 | case CPTK_IS_TRIVIAL: | |
ff284b4b | 7323 | if (!check_trait_type (type1)) |
4f75413f | 7324 | return error_mark_node; |
ff284b4b PC |
7325 | break; |
7326 | ||
7327 | case CPTK_IS_BASE_OF: | |
7328 | if (NON_UNION_CLASS_TYPE_P (type1) && NON_UNION_CLASS_TYPE_P (type2) | |
7329 | && !same_type_ignoring_top_level_qualifiers_p (type1, type2) | |
4f75413f PC |
7330 | && !complete_type_or_else (type2, NULL_TREE)) |
7331 | /* We already issued an error. */ | |
7332 | return error_mark_node; | |
ff284b4b PC |
7333 | break; |
7334 | ||
7335 | case CPTK_IS_CLASS: | |
7336 | case CPTK_IS_ENUM: | |
7337 | case CPTK_IS_UNION: | |
7338 | break; | |
7339 | ||
7340 | case CPTK_IS_CONVERTIBLE_TO: | |
7341 | default: | |
7342 | gcc_unreachable (); | |
cb68ec50 PC |
7343 | } |
7344 | ||
7345 | return (trait_expr_value (kind, type1, type2) | |
7346 | ? boolean_true_node : boolean_false_node); | |
7347 | } | |
7348 | ||
6ec637a4 JJ |
7349 | /* Do-nothing variants of functions to handle pragma FLOAT_CONST_DECIMAL64, |
7350 | which is ignored for C++. */ | |
7351 | ||
7352 | void | |
7353 | set_float_const_decimal64 (void) | |
7354 | { | |
7355 | } | |
7356 | ||
7357 | void | |
7358 | clear_float_const_decimal64 (void) | |
7359 | { | |
7360 | } | |
7361 | ||
7362 | bool | |
7363 | float_const_decimal64_p (void) | |
7364 | { | |
7365 | return 0; | |
7366 | } | |
7367 | ||
3b49d762 | 7368 | \f |
7ecbca9d GDR |
7369 | /* Return true if T is a literal type. */ |
7370 | ||
7371 | bool | |
7372 | literal_type_p (tree t) | |
7373 | { | |
83b6b866 | 7374 | if (SCALAR_TYPE_P (t) |
9e1a8dd1 | 7375 | || TREE_CODE (t) == VECTOR_TYPE |
83b6b866 | 7376 | || TREE_CODE (t) == REFERENCE_TYPE) |
7ecbca9d GDR |
7377 | return true; |
7378 | if (CLASS_TYPE_P (t)) | |
6eb47b98 | 7379 | { |
0515f4d2 JM |
7380 | t = complete_type (t); |
7381 | gcc_assert (COMPLETE_TYPE_P (t) || errorcount); | |
7382 | return CLASSTYPE_LITERAL_P (t); | |
6eb47b98 | 7383 | } |
7ecbca9d GDR |
7384 | if (TREE_CODE (t) == ARRAY_TYPE) |
7385 | return literal_type_p (strip_array_types (t)); | |
7386 | return false; | |
7387 | } | |
7388 | ||
7ecbca9d GDR |
7389 | /* If DECL is a variable declared `constexpr', require its type |
7390 | be literal. Return the DECL if OK, otherwise NULL. */ | |
7391 | ||
7392 | tree | |
7393 | ensure_literal_type_for_constexpr_object (tree decl) | |
7394 | { | |
7395 | tree type = TREE_TYPE (decl); | |
5a6ccc94 | 7396 | if (VAR_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl) |
6eb47b98 | 7397 | && !processing_template_decl) |
7ecbca9d | 7398 | { |
a1535f52 PC |
7399 | tree stype = strip_array_types (type); |
7400 | if (CLASS_TYPE_P (stype) && !COMPLETE_TYPE_P (complete_type (stype))) | |
6eb47b98 JM |
7401 | /* Don't complain here, we'll complain about incompleteness |
7402 | when we try to initialize the variable. */; | |
7403 | else if (!literal_type_p (type)) | |
7404 | { | |
7405 | error ("the type %qT of constexpr variable %qD is not literal", | |
7406 | type, decl); | |
f732fa7b | 7407 | explain_non_literal_class (type); |
6eb47b98 JM |
7408 | return NULL; |
7409 | } | |
7ecbca9d GDR |
7410 | } |
7411 | return decl; | |
7412 | } | |
7413 | ||
66e61a34 JM |
7414 | /* Representation of entries in the constexpr function definition table. */ |
7415 | ||
7416 | typedef struct GTY(()) constexpr_fundef { | |
7417 | tree decl; | |
7418 | tree body; | |
7419 | } constexpr_fundef; | |
7420 | ||
7421 | /* This table holds all constexpr function definitions seen in | |
7422 | the current translation unit. */ | |
7423 | ||
7424 | static GTY ((param_is (constexpr_fundef))) htab_t constexpr_fundef_table; | |
7425 | ||
66e61a34 JM |
7426 | /* Utility function used for managing the constexpr function table. |
7427 | Return true if the entries pointed to by P and Q are for the | |
7428 | same constexpr function. */ | |
7429 | ||
7430 | static inline int | |
7431 | constexpr_fundef_equal (const void *p, const void *q) | |
7432 | { | |
7433 | const constexpr_fundef *lhs = (const constexpr_fundef *) p; | |
7434 | const constexpr_fundef *rhs = (const constexpr_fundef *) q; | |
7435 | return lhs->decl == rhs->decl; | |
7436 | } | |
7437 | ||
7438 | /* Utility function used for managing the constexpr function table. | |
7439 | Return a hash value for the entry pointed to by Q. */ | |
7440 | ||
7441 | static inline hashval_t | |
7442 | constexpr_fundef_hash (const void *p) | |
7443 | { | |
7444 | const constexpr_fundef *fundef = (const constexpr_fundef *) p; | |
7445 | return DECL_UID (fundef->decl); | |
7446 | } | |
7447 | ||
7448 | /* Return a previously saved definition of function FUN. */ | |
7449 | ||
7450 | static constexpr_fundef * | |
7451 | retrieve_constexpr_fundef (tree fun) | |
7452 | { | |
7453 | constexpr_fundef fundef = { NULL, NULL }; | |
7454 | if (constexpr_fundef_table == NULL) | |
7455 | return NULL; | |
7456 | ||
7457 | fundef.decl = fun; | |
7458 | return (constexpr_fundef *) htab_find (constexpr_fundef_table, &fundef); | |
7459 | } | |
7460 | ||
91ea6df3 | 7461 | /* Check whether the parameter and return types of FUN are valid for a |
0515f4d2 | 7462 | constexpr function, and complain if COMPLAIN. */ |
91ea6df3 | 7463 | |
0515f4d2 JM |
7464 | static bool |
7465 | is_valid_constexpr_fn (tree fun, bool complain) | |
91ea6df3 | 7466 | { |
91ea6df3 | 7467 | bool ret = true; |
5af1876c PC |
7468 | |
7469 | if (DECL_INHERITED_CTOR_BASE (fun) | |
7470 | && TREE_CODE (fun) == TEMPLATE_DECL) | |
7471 | { | |
7472 | ret = false; | |
7473 | if (complain) | |
7474 | error ("inherited constructor %qD is not constexpr", | |
7475 | get_inherited_ctor (fun)); | |
7476 | } | |
7477 | else | |
7478 | { | |
7479 | for (tree parm = FUNCTION_FIRST_USER_PARM (fun); | |
7480 | parm != NULL_TREE; parm = TREE_CHAIN (parm)) | |
7481 | if (!literal_type_p (TREE_TYPE (parm))) | |
f732fa7b | 7482 | { |
5af1876c PC |
7483 | ret = false; |
7484 | if (complain) | |
7485 | { | |
7486 | error ("invalid type for parameter %d of constexpr " | |
7487 | "function %q+#D", DECL_PARM_INDEX (parm), fun); | |
7488 | explain_non_literal_class (TREE_TYPE (parm)); | |
7489 | } | |
f732fa7b | 7490 | } |
5af1876c | 7491 | } |
91ea6df3 GDR |
7492 | |
7493 | if (!DECL_CONSTRUCTOR_P (fun)) | |
7494 | { | |
7495 | tree rettype = TREE_TYPE (TREE_TYPE (fun)); | |
0515f4d2 | 7496 | if (!literal_type_p (rettype)) |
91ea6df3 GDR |
7497 | { |
7498 | ret = false; | |
7499 | if (complain) | |
f732fa7b JM |
7500 | { |
7501 | error ("invalid return type %qT of constexpr function %q+D", | |
7502 | rettype, fun); | |
7503 | explain_non_literal_class (rettype); | |
7504 | } | |
91ea6df3 GDR |
7505 | } |
7506 | ||
0515f4d2 JM |
7507 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fun) |
7508 | && !CLASSTYPE_LITERAL_P (DECL_CONTEXT (fun))) | |
91ea6df3 | 7509 | { |
0515f4d2 JM |
7510 | ret = false; |
7511 | if (complain) | |
f732fa7b JM |
7512 | { |
7513 | error ("enclosing class of constexpr non-static member " | |
7514 | "function %q+#D is not a literal type", fun); | |
7515 | explain_non_literal_class (DECL_CONTEXT (fun)); | |
7516 | } | |
91ea6df3 GDR |
7517 | } |
7518 | } | |
f0bc5f84 PC |
7519 | else if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fun))) |
7520 | { | |
7521 | ret = false; | |
7522 | if (complain) | |
7523 | error ("%q#T has virtual base classes", DECL_CONTEXT (fun)); | |
7524 | } | |
91ea6df3 GDR |
7525 | |
7526 | return ret; | |
7527 | } | |
7528 | ||
9b2f0394 JM |
7529 | /* Subroutine of build_data_member_initialization. MEMBER is a COMPONENT_REF |
7530 | for a member of an anonymous aggregate, INIT is the initializer for that | |
7531 | member, and VEC_OUTER is the vector of constructor elements for the class | |
7532 | whose constructor we are processing. Add the initializer to the vector | |
7533 | and return true to indicate success. */ | |
7534 | ||
7535 | static bool | |
7536 | build_anon_member_initialization (tree member, tree init, | |
7537 | vec<constructor_elt, va_gc> **vec_outer) | |
7538 | { | |
7539 | /* MEMBER presents the relevant fields from the inside out, but we need | |
7540 | to build up the initializer from the outside in so that we can reuse | |
7541 | previously built CONSTRUCTORs if this is, say, the second field in an | |
7542 | anonymous struct. So we use a vec as a stack. */ | |
00f96dc9 | 7543 | auto_vec<tree, 2> fields; |
9b2f0394 JM |
7544 | do |
7545 | { | |
7546 | fields.safe_push (TREE_OPERAND (member, 1)); | |
7547 | member = TREE_OPERAND (member, 0); | |
7548 | } | |
0f59a31d JM |
7549 | while (ANON_AGGR_TYPE_P (TREE_TYPE (member)) |
7550 | && TREE_CODE (member) == COMPONENT_REF); | |
9b2f0394 JM |
7551 | |
7552 | /* VEC has the constructor elements vector for the context of FIELD. | |
7553 | If FIELD is an anonymous aggregate, we will push inside it. */ | |
7554 | vec<constructor_elt, va_gc> **vec = vec_outer; | |
7555 | tree field; | |
7556 | while (field = fields.pop(), | |
7557 | ANON_AGGR_TYPE_P (TREE_TYPE (field))) | |
7558 | { | |
7559 | tree ctor; | |
7560 | /* If there is already an outer constructor entry for the anonymous | |
7561 | aggregate FIELD, use it; otherwise, insert one. */ | |
7562 | if (vec_safe_is_empty (*vec) | |
7563 | || (*vec)->last().index != field) | |
7564 | { | |
7565 | ctor = build_constructor (TREE_TYPE (field), NULL); | |
7566 | CONSTRUCTOR_APPEND_ELT (*vec, field, ctor); | |
7567 | } | |
7568 | else | |
7569 | ctor = (*vec)->last().value; | |
7570 | vec = &CONSTRUCTOR_ELTS (ctor); | |
7571 | } | |
7572 | ||
7573 | /* Now we're at the innermost field, the one that isn't an anonymous | |
7574 | aggregate. Add its initializer to the CONSTRUCTOR and we're done. */ | |
7575 | gcc_assert (fields.is_empty()); | |
9b2f0394 JM |
7576 | CONSTRUCTOR_APPEND_ELT (*vec, field, init); |
7577 | ||
7578 | return true; | |
7579 | } | |
7580 | ||
66e61a34 JM |
7581 | /* Subroutine of build_constexpr_constructor_member_initializers. |
7582 | The expression tree T represents a data member initialization | |
7583 | in a (constexpr) constructor definition. Build a pairing of | |
7584 | the data member with its initializer, and prepend that pair | |
7585 | to the existing initialization pair INITS. */ | |
7586 | ||
7587 | static bool | |
9771b263 | 7588 | build_data_member_initialization (tree t, vec<constructor_elt, va_gc> **vec) |
66e61a34 JM |
7589 | { |
7590 | tree member, init; | |
7591 | if (TREE_CODE (t) == CLEANUP_POINT_EXPR) | |
7592 | t = TREE_OPERAND (t, 0); | |
7593 | if (TREE_CODE (t) == EXPR_STMT) | |
7594 | t = TREE_OPERAND (t, 0); | |
7595 | if (t == error_mark_node) | |
7596 | return false; | |
60d237af JJ |
7597 | if (TREE_CODE (t) == STATEMENT_LIST) |
7598 | { | |
7599 | tree_stmt_iterator i; | |
7600 | for (i = tsi_start (t); !tsi_end_p (i); tsi_next (&i)) | |
7601 | { | |
7602 | if (! build_data_member_initialization (tsi_stmt (i), vec)) | |
7603 | return false; | |
7604 | } | |
7605 | return true; | |
7606 | } | |
66e61a34 | 7607 | if (TREE_CODE (t) == CLEANUP_STMT) |
ebb526f9 JJ |
7608 | { |
7609 | /* We can't see a CLEANUP_STMT in a constructor for a literal class, | |
7610 | but we can in a constexpr constructor for a non-literal class. Just | |
7611 | ignore it; either all the initialization will be constant, in which | |
7612 | case the cleanup can't run, or it can't be constexpr. | |
7613 | Still recurse into CLEANUP_BODY. */ | |
60d237af | 7614 | return build_data_member_initialization (CLEANUP_BODY (t), vec); |
ebb526f9 | 7615 | } |
66e61a34 JM |
7616 | if (TREE_CODE (t) == CONVERT_EXPR) |
7617 | t = TREE_OPERAND (t, 0); | |
7618 | if (TREE_CODE (t) == INIT_EXPR | |
7619 | || TREE_CODE (t) == MODIFY_EXPR) | |
7620 | { | |
7621 | member = TREE_OPERAND (t, 0); | |
b6d846de | 7622 | init = break_out_target_exprs (TREE_OPERAND (t, 1)); |
66e61a34 | 7623 | } |
b53e0533 | 7624 | else if (TREE_CODE (t) == CALL_EXPR) |
66e61a34 | 7625 | { |
66e61a34 | 7626 | member = CALL_EXPR_ARG (t, 0); |
0e5dcad1 JM |
7627 | /* We don't use build_cplus_new here because it complains about |
7628 | abstract bases. Leaving the call unwrapped means that it has the | |
7629 | wrong type, but cxx_eval_constant_expression doesn't care. */ | |
b6d846de | 7630 | init = break_out_target_exprs (t); |
0e5dcad1 | 7631 | } |
b53e0533 JM |
7632 | else if (TREE_CODE (t) == DECL_EXPR) |
7633 | /* Declaring a temporary, don't add it to the CONSTRUCTOR. */ | |
7634 | return true; | |
7635 | else | |
7636 | gcc_unreachable (); | |
591cb3cf | 7637 | if (INDIRECT_REF_P (member)) |
0e5dcad1 JM |
7638 | member = TREE_OPERAND (member, 0); |
7639 | if (TREE_CODE (member) == NOP_EXPR) | |
7640 | { | |
7641 | tree op = member; | |
7642 | STRIP_NOPS (op); | |
7643 | if (TREE_CODE (op) == ADDR_EXPR) | |
66e61a34 | 7644 | { |
0e5dcad1 JM |
7645 | gcc_assert (same_type_ignoring_top_level_qualifiers_p |
7646 | (TREE_TYPE (TREE_TYPE (op)), | |
7647 | TREE_TYPE (TREE_TYPE (member)))); | |
7648 | /* Initializing a cv-qualified member; we need to look through | |
7649 | the const_cast. */ | |
7650 | member = op; | |
66e61a34 | 7651 | } |
176fcc5d JM |
7652 | else if (op == current_class_ptr |
7653 | && (same_type_ignoring_top_level_qualifiers_p | |
7654 | (TREE_TYPE (TREE_TYPE (member)), | |
7655 | current_class_type))) | |
7656 | /* Delegating constructor. */ | |
7657 | member = op; | |
66e61a34 JM |
7658 | else |
7659 | { | |
72de8622 JM |
7660 | /* This is an initializer for an empty base; keep it for now so |
7661 | we can check it in cxx_eval_bare_aggregate. */ | |
0e5dcad1 | 7662 | gcc_assert (is_empty_class (TREE_TYPE (TREE_TYPE (member)))); |
66e61a34 | 7663 | } |
66e61a34 | 7664 | } |
0e5dcad1 JM |
7665 | if (TREE_CODE (member) == ADDR_EXPR) |
7666 | member = TREE_OPERAND (member, 0); | |
9b2f0394 JM |
7667 | if (TREE_CODE (member) == COMPONENT_REF) |
7668 | { | |
7669 | tree aggr = TREE_OPERAND (member, 0); | |
7670 | if (TREE_CODE (aggr) != COMPONENT_REF) | |
7671 | /* Normal member initialization. */ | |
7672 | member = TREE_OPERAND (member, 1); | |
7673 | else if (ANON_AGGR_TYPE_P (TREE_TYPE (aggr))) | |
7674 | /* Initializing a member of an anonymous union. */ | |
7675 | return build_anon_member_initialization (member, init, vec); | |
7676 | else | |
7677 | /* We're initializing a vtable pointer in a base. Leave it as | |
7678 | COMPONENT_REF so we remember the path to get to the vfield. */ | |
7679 | gcc_assert (TREE_TYPE (member) == vtbl_ptr_type_node); | |
7680 | } | |
7681 | ||
66e61a34 JM |
7682 | CONSTRUCTOR_APPEND_ELT (*vec, member, init); |
7683 | return true; | |
7684 | } | |
7685 | ||
9b7d0509 JM |
7686 | /* Make sure that there are no statements after LAST in the constructor |
7687 | body represented by LIST. */ | |
7688 | ||
7689 | bool | |
7690 | check_constexpr_ctor_body (tree last, tree list) | |
7691 | { | |
7692 | bool ok = true; | |
7693 | if (TREE_CODE (list) == STATEMENT_LIST) | |
7694 | { | |
7695 | tree_stmt_iterator i = tsi_last (list); | |
7696 | for (; !tsi_end_p (i); tsi_prev (&i)) | |
7697 | { | |
7698 | tree t = tsi_stmt (i); | |
7699 | if (t == last) | |
7700 | break; | |
7701 | if (TREE_CODE (t) == BIND_EXPR) | |
7702 | { | |
4fd602a1 PC |
7703 | if (BIND_EXPR_VARS (t)) |
7704 | { | |
7705 | ok = false; | |
7706 | break; | |
7707 | } | |
9b7d0509 JM |
7708 | if (!check_constexpr_ctor_body (last, BIND_EXPR_BODY (t))) |
7709 | return false; | |
7710 | else | |
7711 | continue; | |
7712 | } | |
7713 | /* We currently allow typedefs and static_assert. | |
7714 | FIXME allow them in the standard, too. */ | |
7715 | if (TREE_CODE (t) != STATIC_ASSERT) | |
7716 | { | |
7717 | ok = false; | |
7718 | break; | |
7719 | } | |
7720 | } | |
7721 | } | |
7722 | else if (list != last | |
7723 | && TREE_CODE (list) != STATIC_ASSERT) | |
7724 | ok = false; | |
7725 | if (!ok) | |
7726 | { | |
7727 | error ("constexpr constructor does not have empty body"); | |
7728 | DECL_DECLARED_CONSTEXPR_P (current_function_decl) = false; | |
7729 | } | |
7730 | return ok; | |
7731 | } | |
7732 | ||
9771b263 | 7733 | /* V is a vector of constructor elements built up for the base and member |
c2b3ec18 JM |
7734 | initializers of a constructor for TYPE. They need to be in increasing |
7735 | offset order, which they might not be yet if TYPE has a primary base | |
1f8aec00 JM |
7736 | which is not first in the base-clause or a vptr and at least one base |
7737 | all of which are non-primary. */ | |
c2b3ec18 | 7738 | |
9771b263 DN |
7739 | static vec<constructor_elt, va_gc> * |
7740 | sort_constexpr_mem_initializers (tree type, vec<constructor_elt, va_gc> *v) | |
c2b3ec18 | 7741 | { |
091871ea | 7742 | tree pri = CLASSTYPE_PRIMARY_BINFO (type); |
1f8aec00 | 7743 | tree field_type; |
9119c7fa PC |
7744 | unsigned i; |
7745 | constructor_elt *ce; | |
091871ea | 7746 | |
1f8aec00 JM |
7747 | if (pri) |
7748 | field_type = BINFO_TYPE (pri); | |
7749 | else if (TYPE_CONTAINS_VPTR_P (type)) | |
7750 | field_type = vtbl_ptr_type_node; | |
7751 | else | |
9771b263 | 7752 | return v; |
c2b3ec18 | 7753 | |
1f8aec00 JM |
7754 | /* Find the element for the primary base or vptr and move it to the |
7755 | beginning of the vec. */ | |
9119c7fa PC |
7756 | for (i = 0; vec_safe_iterate (v, i, &ce); ++i) |
7757 | if (TREE_TYPE (ce->index) == field_type) | |
c2b3ec18 | 7758 | break; |
091871ea | 7759 | |
9119c7fa | 7760 | if (i > 0 && i < vec_safe_length (v)) |
1f8aec00 | 7761 | { |
9119c7fa PC |
7762 | vec<constructor_elt, va_gc> &vref = *v; |
7763 | constructor_elt elt = vref[i]; | |
1f8aec00 JM |
7764 | for (; i > 0; --i) |
7765 | vref[i] = vref[i-1]; | |
7766 | vref[0] = elt; | |
7767 | } | |
7768 | ||
9771b263 | 7769 | return v; |
c2b3ec18 JM |
7770 | } |
7771 | ||
66e61a34 JM |
7772 | /* Build compile-time evalable representations of member-initializer list |
7773 | for a constexpr constructor. */ | |
7774 | ||
7775 | static tree | |
7776 | build_constexpr_constructor_member_initializers (tree type, tree body) | |
7777 | { | |
9771b263 | 7778 | vec<constructor_elt, va_gc> *vec = NULL; |
66e61a34 JM |
7779 | bool ok = true; |
7780 | if (TREE_CODE (body) == MUST_NOT_THROW_EXPR | |
7781 | || TREE_CODE (body) == EH_SPEC_BLOCK) | |
7782 | body = TREE_OPERAND (body, 0); | |
d4e55f30 JM |
7783 | if (TREE_CODE (body) == STATEMENT_LIST) |
7784 | body = STATEMENT_LIST_HEAD (body)->stmt; | |
7785 | body = BIND_EXPR_BODY (body); | |
66e61a34 | 7786 | if (TREE_CODE (body) == CLEANUP_POINT_EXPR) |
62f9aedc JM |
7787 | { |
7788 | body = TREE_OPERAND (body, 0); | |
7789 | if (TREE_CODE (body) == EXPR_STMT) | |
7790 | body = TREE_OPERAND (body, 0); | |
7791 | if (TREE_CODE (body) == INIT_EXPR | |
7792 | && (same_type_ignoring_top_level_qualifiers_p | |
7793 | (TREE_TYPE (TREE_OPERAND (body, 0)), | |
7794 | current_class_type))) | |
7795 | { | |
7796 | /* Trivial copy. */ | |
7797 | return TREE_OPERAND (body, 1); | |
7798 | } | |
7799 | ok = build_data_member_initialization (body, &vec); | |
7800 | } | |
0787e2e7 | 7801 | else if (TREE_CODE (body) == STATEMENT_LIST) |
66e61a34 JM |
7802 | { |
7803 | tree_stmt_iterator i; | |
66e61a34 JM |
7804 | for (i = tsi_start (body); !tsi_end_p (i); tsi_next (&i)) |
7805 | { | |
7806 | ok = build_data_member_initialization (tsi_stmt (i), &vec); | |
7807 | if (!ok) | |
7808 | break; | |
7809 | } | |
7810 | } | |
0fced815 PC |
7811 | else if (TREE_CODE (body) == TRY_BLOCK) |
7812 | { | |
7813 | error ("body of %<constexpr%> constructor cannot be " | |
7814 | "a function-try-block"); | |
7815 | return error_mark_node; | |
7816 | } | |
1cef7102 DS |
7817 | else if (EXPR_P (body)) |
7818 | ok = build_data_member_initialization (body, &vec); | |
0787e2e7 JM |
7819 | else |
7820 | gcc_assert (errorcount > 0); | |
66e61a34 | 7821 | if (ok) |
176fcc5d | 7822 | { |
9771b263 | 7823 | if (vec_safe_length (vec) > 0) |
176fcc5d JM |
7824 | { |
7825 | /* In a delegating constructor, return the target. */ | |
9771b263 | 7826 | constructor_elt *ce = &(*vec)[0]; |
176fcc5d JM |
7827 | if (ce->index == current_class_ptr) |
7828 | { | |
7829 | body = ce->value; | |
9771b263 | 7830 | vec_free (vec); |
176fcc5d JM |
7831 | return body; |
7832 | } | |
7833 | } | |
c2b3ec18 | 7834 | vec = sort_constexpr_mem_initializers (type, vec); |
176fcc5d JM |
7835 | return build_constructor (type, vec); |
7836 | } | |
66e61a34 JM |
7837 | else |
7838 | return error_mark_node; | |
7839 | } | |
7840 | ||
62add5e1 JM |
7841 | /* Subroutine of register_constexpr_fundef. BODY is the body of a function |
7842 | declared to be constexpr, or a sub-statement thereof. Returns the | |
7843 | return value if suitable, error_mark_node for a statement not allowed in | |
7844 | a constexpr function, or NULL_TREE if no return value was found. */ | |
7845 | ||
7846 | static tree | |
7847 | constexpr_fn_retval (tree body) | |
7848 | { | |
7849 | switch (TREE_CODE (body)) | |
7850 | { | |
7851 | case STATEMENT_LIST: | |
7852 | { | |
7853 | tree_stmt_iterator i; | |
7854 | tree expr = NULL_TREE; | |
7855 | for (i = tsi_start (body); !tsi_end_p (i); tsi_next (&i)) | |
7856 | { | |
7857 | tree s = constexpr_fn_retval (tsi_stmt (i)); | |
7858 | if (s == error_mark_node) | |
7859 | return error_mark_node; | |
7860 | else if (s == NULL_TREE) | |
7861 | /* Keep iterating. */; | |
7862 | else if (expr) | |
7863 | /* Multiple return statements. */ | |
7864 | return error_mark_node; | |
7865 | else | |
7866 | expr = s; | |
7867 | } | |
7868 | return expr; | |
7869 | } | |
7870 | ||
7871 | case RETURN_EXPR: | |
b6d846de | 7872 | return break_out_target_exprs (TREE_OPERAND (body, 0)); |
62add5e1 JM |
7873 | |
7874 | case DECL_EXPR: | |
7875 | if (TREE_CODE (DECL_EXPR_DECL (body)) == USING_DECL) | |
7876 | return NULL_TREE; | |
7877 | return error_mark_node; | |
7878 | ||
11324716 JM |
7879 | case CLEANUP_POINT_EXPR: |
7880 | return constexpr_fn_retval (TREE_OPERAND (body, 0)); | |
7881 | ||
62add5e1 JM |
7882 | case USING_STMT: |
7883 | return NULL_TREE; | |
7884 | ||
7885 | default: | |
7886 | return error_mark_node; | |
7887 | } | |
7888 | } | |
7889 | ||
f732fa7b JM |
7890 | /* Subroutine of register_constexpr_fundef. BODY is the DECL_SAVED_TREE of |
7891 | FUN; do the necessary transformations to turn it into a single expression | |
7892 | that we can store in the hash table. */ | |
66e61a34 | 7893 | |
f732fa7b JM |
7894 | static tree |
7895 | massage_constexpr_body (tree fun, tree body) | |
66e61a34 | 7896 | { |
66e61a34 JM |
7897 | if (DECL_CONSTRUCTOR_P (fun)) |
7898 | body = build_constexpr_constructor_member_initializers | |
7899 | (DECL_CONTEXT (fun), body); | |
7900 | else | |
7901 | { | |
66e61a34 JM |
7902 | if (TREE_CODE (body) == EH_SPEC_BLOCK) |
7903 | body = EH_SPEC_STMTS (body); | |
7904 | if (TREE_CODE (body) == MUST_NOT_THROW_EXPR) | |
7905 | body = TREE_OPERAND (body, 0); | |
65a6f609 PC |
7906 | if (TREE_CODE (body) == BIND_EXPR) |
7907 | body = BIND_EXPR_BODY (body); | |
62add5e1 | 7908 | body = constexpr_fn_retval (body); |
f732fa7b JM |
7909 | } |
7910 | return body; | |
7911 | } | |
7912 | ||
aee88012 JM |
7913 | /* FUN is a constexpr constructor with massaged body BODY. Return true |
7914 | if some bases/fields are uninitialized, and complain if COMPLAIN. */ | |
7915 | ||
7916 | static bool | |
7917 | cx_check_missing_mem_inits (tree fun, tree body, bool complain) | |
7918 | { | |
7919 | bool bad; | |
7920 | tree field; | |
7921 | unsigned i, nelts; | |
88f7a9f6 | 7922 | tree ctype; |
aee88012 JM |
7923 | |
7924 | if (TREE_CODE (body) != CONSTRUCTOR) | |
7925 | return false; | |
7926 | ||
aee88012 | 7927 | nelts = CONSTRUCTOR_NELTS (body); |
88f7a9f6 JM |
7928 | ctype = DECL_CONTEXT (fun); |
7929 | field = TYPE_FIELDS (ctype); | |
7930 | ||
7931 | if (TREE_CODE (ctype) == UNION_TYPE) | |
7932 | { | |
7933 | if (nelts == 0 && next_initializable_field (field)) | |
7934 | { | |
7935 | if (complain) | |
7936 | error ("%<constexpr%> constructor for union %qT must " | |
7937 | "initialize exactly one non-static data member", ctype); | |
7938 | return true; | |
7939 | } | |
7940 | return false; | |
7941 | } | |
7942 | ||
7943 | bad = false; | |
aee88012 JM |
7944 | for (i = 0; i <= nelts; ++i) |
7945 | { | |
7946 | tree index; | |
7947 | if (i == nelts) | |
7948 | index = NULL_TREE; | |
7949 | else | |
7950 | { | |
7951 | index = CONSTRUCTOR_ELT (body, i)->index; | |
e2605091 | 7952 | /* Skip base and vtable inits. */ |
e1dfe005 PC |
7953 | if (TREE_CODE (index) != FIELD_DECL |
7954 | || DECL_ARTIFICIAL (index)) | |
aee88012 JM |
7955 | continue; |
7956 | } | |
e1dfe005 | 7957 | for (; field != index; field = DECL_CHAIN (field)) |
aee88012 | 7958 | { |
e2605091 | 7959 | tree ftype; |
aee88012 | 7960 | if (TREE_CODE (field) != FIELD_DECL |
c2b3ec18 JM |
7961 | || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field)) |
7962 | || DECL_ARTIFICIAL (field)) | |
aee88012 | 7963 | continue; |
e2605091 JM |
7964 | ftype = strip_array_types (TREE_TYPE (field)); |
7965 | if (type_has_constexpr_default_constructor (ftype)) | |
7966 | { | |
7967 | /* It's OK to skip a member with a trivial constexpr ctor. | |
7968 | A constexpr ctor that isn't trivial should have been | |
7969 | added in by now. */ | |
358b9253 DS |
7970 | gcc_checking_assert (!TYPE_HAS_COMPLEX_DFLT (ftype) |
7971 | || errorcount != 0); | |
e2605091 JM |
7972 | continue; |
7973 | } | |
88f7a9f6 JM |
7974 | if (!complain) |
7975 | return true; | |
aee88012 JM |
7976 | error ("uninitialized member %qD in %<constexpr%> constructor", |
7977 | field); | |
7978 | bad = true; | |
7979 | } | |
7980 | if (field == NULL_TREE) | |
7981 | break; | |
7982 | field = DECL_CHAIN (field); | |
7983 | } | |
7984 | ||
7985 | return bad; | |
7986 | } | |
7987 | ||
f732fa7b JM |
7988 | /* We are processing the definition of the constexpr function FUN. |
7989 | Check that its BODY fulfills the propriate requirements and | |
7990 | enter it in the constexpr function definition table. | |
7991 | For constructor BODY is actually the TREE_LIST of the | |
7992 | member-initializer list. */ | |
7993 | ||
7994 | tree | |
7995 | register_constexpr_fundef (tree fun, tree body) | |
7996 | { | |
7997 | constexpr_fundef entry; | |
7998 | constexpr_fundef **slot; | |
7999 | ||
b432106b | 8000 | if (!is_valid_constexpr_fn (fun, !DECL_GENERATED_P (fun))) |
e2605091 JM |
8001 | return NULL; |
8002 | ||
f732fa7b JM |
8003 | body = massage_constexpr_body (fun, body); |
8004 | if (body == NULL_TREE || body == error_mark_node) | |
8005 | { | |
0e5f8a59 JM |
8006 | if (!DECL_CONSTRUCTOR_P (fun)) |
8007 | error ("body of constexpr function %qD not a return-statement", fun); | |
f732fa7b | 8008 | return NULL; |
66e61a34 JM |
8009 | } |
8010 | ||
cb21e9cd | 8011 | if (!potential_rvalue_constant_expression (body)) |
66e61a34 | 8012 | { |
b432106b | 8013 | if (!DECL_GENERATED_P (fun)) |
cb21e9cd | 8014 | require_potential_rvalue_constant_expression (body); |
66e61a34 JM |
8015 | return NULL; |
8016 | } | |
9b41f0d3 | 8017 | |
aee88012 | 8018 | if (DECL_CONSTRUCTOR_P (fun) |
b432106b | 8019 | && cx_check_missing_mem_inits (fun, body, !DECL_GENERATED_P (fun))) |
aee88012 JM |
8020 | return NULL; |
8021 | ||
9b41f0d3 JM |
8022 | /* Create the constexpr function table if necessary. */ |
8023 | if (constexpr_fundef_table == NULL) | |
8024 | constexpr_fundef_table = htab_create_ggc (101, | |
8025 | constexpr_fundef_hash, | |
8026 | constexpr_fundef_equal, | |
8027 | ggc_free); | |
8028 | entry.decl = fun; | |
8029 | entry.body = body; | |
8030 | slot = (constexpr_fundef **) | |
8031 | htab_find_slot (constexpr_fundef_table, &entry, INSERT); | |
8032 | ||
8033 | gcc_assert (*slot == NULL); | |
766090c2 | 8034 | *slot = ggc_alloc<constexpr_fundef> (); |
9b41f0d3 JM |
8035 | **slot = entry; |
8036 | ||
66e61a34 JM |
8037 | return fun; |
8038 | } | |
8039 | ||
f732fa7b JM |
8040 | /* FUN is a non-constexpr function called in a context that requires a |
8041 | constant expression. If it comes from a constexpr template, explain why | |
8042 | the instantiation isn't constexpr. */ | |
8043 | ||
8044 | void | |
8045 | explain_invalid_constexpr_fn (tree fun) | |
8046 | { | |
6e2830c3 | 8047 | static hash_set<tree> *diagnosed; |
f732fa7b JM |
8048 | tree body; |
8049 | location_t save_loc; | |
fd3faf2b JM |
8050 | /* Only diagnose defaulted functions or instantiations. */ |
8051 | if (!DECL_DEFAULTED_FN (fun) | |
8052 | && !is_instantiation_of_constexpr (fun)) | |
f732fa7b JM |
8053 | return; |
8054 | if (diagnosed == NULL) | |
6e2830c3 TS |
8055 | diagnosed = new hash_set<tree>; |
8056 | if (diagnosed->add (fun)) | |
f732fa7b JM |
8057 | /* Already explained. */ |
8058 | return; | |
8059 | ||
8060 | save_loc = input_location; | |
8061 | input_location = DECL_SOURCE_LOCATION (fun); | |
aee88012 | 8062 | inform (0, "%q+D is not usable as a constexpr function because:", fun); |
f732fa7b JM |
8063 | /* First check the declaration. */ |
8064 | if (is_valid_constexpr_fn (fun, true)) | |
8065 | { | |
8066 | /* Then if it's OK, the body. */ | |
e89ff446 | 8067 | if (!DECL_DECLARED_CONSTEXPR_P (fun)) |
f732fa7b JM |
8068 | explain_implicit_non_constexpr (fun); |
8069 | else | |
8070 | { | |
8071 | body = massage_constexpr_body (fun, DECL_SAVED_TREE (fun)); | |
8072 | require_potential_rvalue_constant_expression (body); | |
aee88012 JM |
8073 | if (DECL_CONSTRUCTOR_P (fun)) |
8074 | cx_check_missing_mem_inits (fun, body, true); | |
f732fa7b JM |
8075 | } |
8076 | } | |
8077 | input_location = save_loc; | |
8078 | } | |
8079 | ||
c41095db GDR |
8080 | /* Objects of this type represent calls to constexpr functions |
8081 | along with the bindings of parameters to their arguments, for | |
8082 | the purpose of compile time evaluation. */ | |
8083 | ||
8084 | typedef struct GTY(()) constexpr_call { | |
8085 | /* Description of the constexpr function definition. */ | |
8086 | constexpr_fundef *fundef; | |
c523fc89 | 8087 | /* Parameter bindings environment. A TREE_LIST where each TREE_PURPOSE |
c41095db | 8088 | is a parameter _DECL and the TREE_VALUE is the value of the parameter. |
c65cb8d1 | 8089 | Note: This arrangement is made to accommodate the use of |
c41095db GDR |
8090 | iterative_hash_template_arg (see pt.c). If you change this |
8091 | representation, also change the hash calculation in | |
8092 | cxx_eval_call_expression. */ | |
8093 | tree bindings; | |
8094 | /* Result of the call. | |
8095 | NULL means the call is being evaluated. | |
8096 | error_mark_node means that the evaluation was erroneous; | |
8097 | otherwise, the actuall value of the call. */ | |
8098 | tree result; | |
8099 | /* The hash of this call; we remember it here to avoid having to | |
8100 | recalculate it when expanding the hash table. */ | |
8101 | hashval_t hash; | |
8102 | } constexpr_call; | |
8103 | ||
8104 | /* A table of all constexpr calls that have been evaluated by the | |
8105 | compiler in this translation unit. */ | |
8106 | ||
8107 | static GTY ((param_is (constexpr_call))) htab_t constexpr_call_table; | |
8108 | ||
8109 | static tree cxx_eval_constant_expression (const constexpr_call *, tree, | |
81ede53a | 8110 | bool, bool, bool *, bool *); |
c41095db GDR |
8111 | |
8112 | /* Compute a hash value for a constexpr call representation. */ | |
8113 | ||
8114 | static hashval_t | |
8115 | constexpr_call_hash (const void *p) | |
8116 | { | |
8117 | const constexpr_call *info = (const constexpr_call *) p; | |
8118 | return info->hash; | |
8119 | } | |
8120 | ||
8121 | /* Return 1 if the objects pointed to by P and Q represent calls | |
8122 | to the same constexpr function with the same arguments. | |
8123 | Otherwise, return 0. */ | |
8124 | ||
8125 | static int | |
8126 | constexpr_call_equal (const void *p, const void *q) | |
8127 | { | |
8128 | const constexpr_call *lhs = (const constexpr_call *) p; | |
8129 | const constexpr_call *rhs = (const constexpr_call *) q; | |
8130 | tree lhs_bindings; | |
8131 | tree rhs_bindings; | |
8132 | if (lhs == rhs) | |
8133 | return 1; | |
8134 | if (!constexpr_fundef_equal (lhs->fundef, rhs->fundef)) | |
8135 | return 0; | |
8136 | lhs_bindings = lhs->bindings; | |
8137 | rhs_bindings = rhs->bindings; | |
8138 | while (lhs_bindings != NULL && rhs_bindings != NULL) | |
8139 | { | |
8140 | tree lhs_arg = TREE_VALUE (lhs_bindings); | |
8141 | tree rhs_arg = TREE_VALUE (rhs_bindings); | |
8142 | gcc_assert (TREE_TYPE (lhs_arg) == TREE_TYPE (rhs_arg)); | |
8143 | if (!cp_tree_equal (lhs_arg, rhs_arg)) | |
8144 | return 0; | |
8145 | lhs_bindings = TREE_CHAIN (lhs_bindings); | |
8146 | rhs_bindings = TREE_CHAIN (rhs_bindings); | |
8147 | } | |
8148 | return lhs_bindings == rhs_bindings; | |
8149 | } | |
8150 | ||
8151 | /* Initialize the constexpr call table, if needed. */ | |
8152 | ||
8153 | static void | |
8154 | maybe_initialize_constexpr_call_table (void) | |
8155 | { | |
8156 | if (constexpr_call_table == NULL) | |
8157 | constexpr_call_table = htab_create_ggc (101, | |
8158 | constexpr_call_hash, | |
8159 | constexpr_call_equal, | |
8160 | ggc_free); | |
8161 | } | |
8162 | ||
66e61a34 JM |
8163 | /* Return true if T designates the implied `this' parameter. */ |
8164 | ||
43b781fa | 8165 | bool |
66e61a34 JM |
8166 | is_this_parameter (tree t) |
8167 | { | |
6626c52e JM |
8168 | if (!DECL_P (t) || DECL_NAME (t) != this_identifier) |
8169 | return false; | |
8170 | gcc_assert (TREE_CODE (t) == PARM_DECL || is_capture_proxy (t)); | |
8171 | return true; | |
66e61a34 JM |
8172 | } |
8173 | ||
8174 | /* We have an expression tree T that represents a call, either CALL_EXPR | |
8175 | or AGGR_INIT_EXPR. If the call is lexically to a named function, | |
8176 | retrun the _DECL for that function. */ | |
8177 | ||
8178 | static tree | |
8179 | get_function_named_in_call (tree t) | |
8180 | { | |
8181 | tree fun = NULL; | |
8182 | switch (TREE_CODE (t)) | |
8183 | { | |
8184 | case CALL_EXPR: | |
8185 | fun = CALL_EXPR_FN (t); | |
8186 | break; | |
8187 | ||
8188 | case AGGR_INIT_EXPR: | |
8189 | fun = AGGR_INIT_EXPR_FN (t); | |
8190 | break; | |
8191 | ||
8192 | default: | |
8193 | gcc_unreachable(); | |
8194 | break; | |
8195 | } | |
8196 | if (TREE_CODE (fun) == ADDR_EXPR | |
8197 | && TREE_CODE (TREE_OPERAND (fun, 0)) == FUNCTION_DECL) | |
8198 | fun = TREE_OPERAND (fun, 0); | |
7ecbca9d GDR |
8199 | return fun; |
8200 | } | |
8201 | ||
66e61a34 JM |
8202 | /* We have an expression tree T that represents a call, either CALL_EXPR |
8203 | or AGGR_INIT_EXPR. Return the Nth argument. */ | |
8204 | ||
8205 | static inline tree | |
8206 | get_nth_callarg (tree t, int n) | |
8207 | { | |
8208 | switch (TREE_CODE (t)) | |
8209 | { | |
8210 | case CALL_EXPR: | |
8211 | return CALL_EXPR_ARG (t, n); | |
8212 | ||
8213 | case AGGR_INIT_EXPR: | |
8214 | return AGGR_INIT_EXPR_ARG (t, n); | |
8215 | ||
8216 | default: | |
8217 | gcc_unreachable (); | |
8218 | return NULL; | |
8219 | } | |
8220 | } | |
8221 | ||
c41095db GDR |
8222 | /* Look up the binding of the function parameter T in a constexpr |
8223 | function call context CALL. */ | |
8224 | ||
8225 | static tree | |
8226 | lookup_parameter_binding (const constexpr_call *call, tree t) | |
8227 | { | |
8228 | tree b = purpose_member (t, call->bindings); | |
8229 | return TREE_VALUE (b); | |
8230 | } | |
8231 | ||
8232 | /* Attempt to evaluate T which represents a call to a builtin function. | |
8233 | We assume here that all builtin functions evaluate to scalar types | |
8234 | represented by _CST nodes. */ | |
8235 | ||
8236 | static tree | |
8237 | cxx_eval_builtin_function_call (const constexpr_call *call, tree t, | |
8238 | bool allow_non_constant, bool addr, | |
81ede53a | 8239 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
8240 | { |
8241 | const int nargs = call_expr_nargs (t); | |
8242 | tree *args = (tree *) alloca (nargs * sizeof (tree)); | |
8243 | tree new_call; | |
8244 | int i; | |
8245 | for (i = 0; i < nargs; ++i) | |
8246 | { | |
8247 | args[i] = cxx_eval_constant_expression (call, CALL_EXPR_ARG (t, i), | |
8248 | allow_non_constant, addr, | |
81ede53a | 8249 | non_constant_p, overflow_p); |
c41095db GDR |
8250 | if (allow_non_constant && *non_constant_p) |
8251 | return t; | |
8252 | } | |
8253 | if (*non_constant_p) | |
8254 | return t; | |
8255 | new_call = build_call_array_loc (EXPR_LOCATION (t), TREE_TYPE (t), | |
8256 | CALL_EXPR_FN (t), nargs, args); | |
3da2b176 AH |
8257 | new_call = fold (new_call); |
8258 | VERIFY_CONSTANT (new_call); | |
8259 | return new_call; | |
c41095db GDR |
8260 | } |
8261 | ||
8262 | /* TEMP is the constant value of a temporary object of type TYPE. Adjust | |
8263 | the type of the value to match. */ | |
8264 | ||
8265 | static tree | |
8266 | adjust_temp_type (tree type, tree temp) | |
8267 | { | |
8268 | if (TREE_TYPE (temp) == type) | |
8269 | return temp; | |
8270 | /* Avoid wrapping an aggregate value in a NOP_EXPR. */ | |
8271 | if (TREE_CODE (temp) == CONSTRUCTOR) | |
8272 | return build_constructor (type, CONSTRUCTOR_ELTS (temp)); | |
947f720f | 8273 | gcc_assert (scalarish_type_p (type)); |
9e115cec | 8274 | return cp_fold_convert (type, temp); |
c41095db GDR |
8275 | } |
8276 | ||
8277 | /* Subroutine of cxx_eval_call_expression. | |
8278 | We are processing a call expression (either CALL_EXPR or | |
8279 | AGGR_INIT_EXPR) in the call context of OLD_CALL. Evaluate | |
8280 | all arguments and bind their values to correspondings | |
8281 | parameters, making up the NEW_CALL context. */ | |
8282 | ||
8283 | static void | |
8284 | cxx_bind_parameters_in_call (const constexpr_call *old_call, tree t, | |
8285 | constexpr_call *new_call, | |
8286 | bool allow_non_constant, | |
81ede53a | 8287 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
8288 | { |
8289 | const int nargs = call_expr_nargs (t); | |
8290 | tree fun = new_call->fundef->decl; | |
8291 | tree parms = DECL_ARGUMENTS (fun); | |
8292 | int i; | |
8293 | for (i = 0; i < nargs; ++i) | |
8294 | { | |
8295 | tree x, arg; | |
8296 | tree type = parms ? TREE_TYPE (parms) : void_type_node; | |
8297 | /* For member function, the first argument is a pointer to the implied | |
c65cb8d1 | 8298 | object. And for an object construction, don't bind `this' before |
c41095db GDR |
8299 | it is fully constructed. */ |
8300 | if (i == 0 && DECL_CONSTRUCTOR_P (fun)) | |
8301 | goto next; | |
8302 | x = get_nth_callarg (t, i); | |
70fc7c6c JM |
8303 | if (parms && DECL_BY_REFERENCE (parms)) |
8304 | { | |
8305 | /* cp_genericize made this a reference for argument passing, but | |
8306 | we don't want to treat it like one for constexpr evaluation. */ | |
8307 | gcc_assert (TREE_CODE (type) == REFERENCE_TYPE); | |
8308 | gcc_assert (TREE_CODE (TREE_TYPE (x)) == REFERENCE_TYPE); | |
8309 | type = TREE_TYPE (type); | |
8310 | x = convert_from_reference (x); | |
8311 | } | |
c41095db GDR |
8312 | arg = cxx_eval_constant_expression (old_call, x, allow_non_constant, |
8313 | TREE_CODE (type) == REFERENCE_TYPE, | |
81ede53a | 8314 | non_constant_p, overflow_p); |
c41095db GDR |
8315 | /* Don't VERIFY_CONSTANT here. */ |
8316 | if (*non_constant_p && allow_non_constant) | |
8317 | return; | |
8318 | /* Just discard ellipsis args after checking their constantitude. */ | |
8319 | if (!parms) | |
8320 | continue; | |
c6f54c7a JM |
8321 | if (*non_constant_p) |
8322 | /* Don't try to adjust the type of non-constant args. */ | |
8323 | goto next; | |
c41095db GDR |
8324 | |
8325 | /* Make sure the binding has the same type as the parm. */ | |
8326 | if (TREE_CODE (type) != REFERENCE_TYPE) | |
8327 | arg = adjust_temp_type (type, arg); | |
8328 | new_call->bindings = tree_cons (parms, arg, new_call->bindings); | |
8329 | next: | |
8330 | parms = TREE_CHAIN (parms); | |
8331 | } | |
8332 | } | |
8333 | ||
2bfe0527 JM |
8334 | /* Variables and functions to manage constexpr call expansion context. |
8335 | These do not need to be marked for PCH or GC. */ | |
8336 | ||
17bc631c | 8337 | /* FIXME remember and print actual constant arguments. */ |
6e1aa848 | 8338 | static vec<tree> call_stack = vNULL; |
2bfe0527 JM |
8339 | static int call_stack_tick; |
8340 | static int last_cx_error_tick; | |
8341 | ||
17bc631c | 8342 | static bool |
2bfe0527 JM |
8343 | push_cx_call_context (tree call) |
8344 | { | |
8345 | ++call_stack_tick; | |
8346 | if (!EXPR_HAS_LOCATION (call)) | |
8347 | SET_EXPR_LOCATION (call, input_location); | |
9771b263 DN |
8348 | call_stack.safe_push (call); |
8349 | if (call_stack.length () > (unsigned) max_constexpr_depth) | |
17bc631c JM |
8350 | return false; |
8351 | return true; | |
2bfe0527 JM |
8352 | } |
8353 | ||
8354 | static void | |
8355 | pop_cx_call_context (void) | |
8356 | { | |
8357 | ++call_stack_tick; | |
9771b263 | 8358 | call_stack.pop (); |
2bfe0527 JM |
8359 | } |
8360 | ||
9771b263 | 8361 | vec<tree> |
2bfe0527 JM |
8362 | cx_error_context (void) |
8363 | { | |
6e1aa848 | 8364 | vec<tree> r = vNULL; |
2bfe0527 | 8365 | if (call_stack_tick != last_cx_error_tick |
9771b263 | 8366 | && !call_stack.is_empty ()) |
2bfe0527 JM |
8367 | r = call_stack; |
8368 | last_cx_error_tick = call_stack_tick; | |
8369 | return r; | |
8370 | } | |
8371 | ||
c41095db GDR |
8372 | /* Subroutine of cxx_eval_constant_expression. |
8373 | Evaluate the call expression tree T in the context of OLD_CALL expression | |
8374 | evaluation. */ | |
8375 | ||
8376 | static tree | |
8377 | cxx_eval_call_expression (const constexpr_call *old_call, tree t, | |
8378 | bool allow_non_constant, bool addr, | |
81ede53a | 8379 | bool *non_constant_p, bool *overflow_p) |
c41095db | 8380 | { |
8400e75e | 8381 | location_t loc = EXPR_LOC_OR_LOC (t, input_location); |
c41095db GDR |
8382 | tree fun = get_function_named_in_call (t); |
8383 | tree result; | |
8384 | constexpr_call new_call = { NULL, NULL, NULL, 0 }; | |
8385 | constexpr_call **slot; | |
17bc631c JM |
8386 | constexpr_call *entry; |
8387 | bool depth_ok; | |
8388 | ||
c41095db GDR |
8389 | if (TREE_CODE (fun) != FUNCTION_DECL) |
8390 | { | |
8391 | /* Might be a constexpr function pointer. */ | |
8392 | fun = cxx_eval_constant_expression (old_call, fun, allow_non_constant, | |
81ede53a | 8393 | /*addr*/false, non_constant_p, overflow_p); |
c41095db GDR |
8394 | if (TREE_CODE (fun) == ADDR_EXPR) |
8395 | fun = TREE_OPERAND (fun, 0); | |
8396 | } | |
8397 | if (TREE_CODE (fun) != FUNCTION_DECL) | |
8398 | { | |
f732fa7b | 8399 | if (!allow_non_constant && !*non_constant_p) |
c41095db GDR |
8400 | error_at (loc, "expression %qE does not designate a constexpr " |
8401 | "function", fun); | |
8402 | *non_constant_p = true; | |
8403 | return t; | |
8404 | } | |
8405 | if (DECL_CLONED_FUNCTION_P (fun)) | |
8406 | fun = DECL_CLONED_FUNCTION (fun); | |
8407 | if (is_builtin_fn (fun)) | |
8408 | return cxx_eval_builtin_function_call (old_call, t, allow_non_constant, | |
81ede53a | 8409 | addr, non_constant_p, overflow_p); |
c41095db GDR |
8410 | if (!DECL_DECLARED_CONSTEXPR_P (fun)) |
8411 | { | |
8412 | if (!allow_non_constant) | |
8413 | { | |
f732fa7b JM |
8414 | error_at (loc, "call to non-constexpr function %qD", fun); |
8415 | explain_invalid_constexpr_fn (fun); | |
c41095db GDR |
8416 | } |
8417 | *non_constant_p = true; | |
8418 | return t; | |
8419 | } | |
8420 | ||
c1c2162e JM |
8421 | /* Shortcut trivial constructor/op=. */ |
8422 | if (trivial_fn_p (fun)) | |
c62f4cd9 | 8423 | { |
c1c2162e JM |
8424 | if (call_expr_nargs (t) == 2) |
8425 | { | |
8426 | tree arg = convert_from_reference (get_nth_callarg (t, 1)); | |
8427 | return cxx_eval_constant_expression (old_call, arg, allow_non_constant, | |
8428 | addr, non_constant_p, overflow_p); | |
8429 | } | |
8430 | else if (TREE_CODE (t) == AGGR_INIT_EXPR | |
8431 | && AGGR_INIT_ZERO_FIRST (t)) | |
8432 | return build_zero_init (DECL_CONTEXT (fun), NULL_TREE, false); | |
c62f4cd9 | 8433 | } |
06a85dd3 | 8434 | |
c41095db GDR |
8435 | /* If in direct recursive call, optimize definition search. */ |
8436 | if (old_call != NULL && old_call->fundef->decl == fun) | |
8437 | new_call.fundef = old_call->fundef; | |
8438 | else | |
8439 | { | |
8440 | new_call.fundef = retrieve_constexpr_fundef (fun); | |
8441 | if (new_call.fundef == NULL || new_call.fundef->body == NULL) | |
8442 | { | |
8443 | if (!allow_non_constant) | |
aee88012 | 8444 | { |
0e5f8a59 | 8445 | if (DECL_INITIAL (fun)) |
aee88012 JM |
8446 | { |
8447 | /* The definition of fun was somehow unsuitable. */ | |
8448 | error_at (loc, "%qD called in a constant expression", fun); | |
8449 | explain_invalid_constexpr_fn (fun); | |
8450 | } | |
8451 | else | |
8452 | error_at (loc, "%qD used before its definition", fun); | |
8453 | } | |
c41095db GDR |
8454 | *non_constant_p = true; |
8455 | return t; | |
8456 | } | |
8457 | } | |
8458 | cxx_bind_parameters_in_call (old_call, t, &new_call, | |
81ede53a | 8459 | allow_non_constant, non_constant_p, overflow_p); |
c41095db GDR |
8460 | if (*non_constant_p) |
8461 | return t; | |
8462 | ||
17bc631c | 8463 | depth_ok = push_cx_call_context (t); |
2bfe0527 | 8464 | |
c41095db GDR |
8465 | new_call.hash |
8466 | = iterative_hash_template_arg (new_call.bindings, | |
8467 | constexpr_fundef_hash (new_call.fundef)); | |
8468 | ||
8469 | /* If we have seen this call before, we are done. */ | |
8470 | maybe_initialize_constexpr_call_table (); | |
8471 | slot = (constexpr_call **) | |
8472 | htab_find_slot (constexpr_call_table, &new_call, INSERT); | |
17bc631c JM |
8473 | entry = *slot; |
8474 | if (entry == NULL) | |
c41095db GDR |
8475 | { |
8476 | /* We need to keep a pointer to the entry, not just the slot, as the | |
8477 | slot can move in the call to cxx_eval_builtin_function_call. */ | |
766090c2 | 8478 | *slot = entry = ggc_alloc<constexpr_call> (); |
c41095db | 8479 | *entry = new_call; |
17bc631c JM |
8480 | } |
8481 | /* Calls which are in progress have their result set to NULL | |
8482 | so that we can detect circular dependencies. */ | |
8483 | else if (entry->result == NULL) | |
8484 | { | |
8485 | if (!allow_non_constant) | |
8486 | error ("call has circular dependency"); | |
8487 | *non_constant_p = true; | |
8488 | entry->result = result = error_mark_node; | |
8489 | } | |
8490 | ||
8491 | if (!depth_ok) | |
8492 | { | |
8493 | if (!allow_non_constant) | |
8494 | error ("constexpr evaluation depth exceeds maximum of %d (use " | |
8495 | "-fconstexpr-depth= to increase the maximum)", | |
8496 | max_constexpr_depth); | |
8497 | *non_constant_p = true; | |
8498 | entry->result = result = error_mark_node; | |
8499 | } | |
8500 | else | |
8501 | { | |
8502 | result = entry->result; | |
a1e0490f | 8503 | if (!result || result == error_mark_node) |
17bc631c JM |
8504 | result = (cxx_eval_constant_expression |
8505 | (&new_call, new_call.fundef->body, | |
8506 | allow_non_constant, addr, | |
81ede53a | 8507 | non_constant_p, overflow_p)); |
17bc631c JM |
8508 | if (result == error_mark_node) |
8509 | *non_constant_p = true; | |
c41095db GDR |
8510 | if (*non_constant_p) |
8511 | entry->result = result = error_mark_node; | |
8512 | else | |
8513 | { | |
8514 | /* If this was a call to initialize an object, set the type of | |
8515 | the CONSTRUCTOR to the type of that object. */ | |
8516 | if (DECL_CONSTRUCTOR_P (fun)) | |
8517 | { | |
8518 | tree ob_arg = get_nth_callarg (t, 0); | |
8519 | STRIP_NOPS (ob_arg); | |
50e10fa8 | 8520 | gcc_assert (TYPE_PTR_P (TREE_TYPE (ob_arg)) |
c41095db GDR |
8521 | && CLASS_TYPE_P (TREE_TYPE (TREE_TYPE (ob_arg)))); |
8522 | result = adjust_temp_type (TREE_TYPE (TREE_TYPE (ob_arg)), | |
8523 | result); | |
8524 | } | |
8525 | entry->result = result; | |
8526 | } | |
8527 | } | |
8528 | ||
2bfe0527 | 8529 | pop_cx_call_context (); |
e26ab5ec | 8530 | return unshare_expr (result); |
c41095db GDR |
8531 | } |
8532 | ||
9e115cec JM |
8533 | /* FIXME speed this up, it's taking 16% of compile time on sieve testcase. */ |
8534 | ||
c41095db GDR |
8535 | bool |
8536 | reduced_constant_expression_p (tree t) | |
8537 | { | |
a25b76d8 JM |
8538 | switch (TREE_CODE (t)) |
8539 | { | |
8540 | case PTRMEM_CST: | |
8541 | /* Even if we can't lower this yet, it's constant. */ | |
8542 | return true; | |
8543 | ||
8544 | case CONSTRUCTOR: | |
8545 | /* And we need to handle PTRMEM_CST wrapped in a CONSTRUCTOR. */ | |
8546 | tree elt; unsigned HOST_WIDE_INT idx; | |
8547 | FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (t), idx, elt) | |
8548 | if (!reduced_constant_expression_p (elt)) | |
8549 | return false; | |
8550 | return true; | |
8551 | ||
8552 | default: | |
8553 | /* FIXME are we calling this too much? */ | |
8554 | return initializer_constant_valid_p (t, TREE_TYPE (t)) != NULL_TREE; | |
8555 | } | |
c41095db GDR |
8556 | } |
8557 | ||
8558 | /* Some expressions may have constant operands but are not constant | |
8559 | themselves, such as 1/0. Call this function (or rather, the macro | |
8560 | following it) to check for that condition. | |
8561 | ||
8562 | We only call this in places that require an arithmetic constant, not in | |
8563 | places where we might have a non-constant expression that can be a | |
8564 | component of a constant expression, such as the address of a constexpr | |
8565 | variable that might be dereferenced later. */ | |
8566 | ||
8567 | static bool | |
81ede53a JM |
8568 | verify_constant (tree t, bool allow_non_constant, bool *non_constant_p, |
8569 | bool *overflow_p) | |
c41095db GDR |
8570 | { |
8571 | if (!*non_constant_p && !reduced_constant_expression_p (t)) | |
81ede53a JM |
8572 | { |
8573 | if (!allow_non_constant) | |
8574 | error ("%q+E is not a constant expression", t); | |
8575 | *non_constant_p = true; | |
8576 | } | |
8577 | if (TREE_OVERFLOW_P (t)) | |
c41095db GDR |
8578 | { |
8579 | if (!allow_non_constant) | |
9e115cec | 8580 | { |
81ede53a JM |
8581 | permerror (input_location, "overflow in constant expression"); |
8582 | /* If we're being permissive (and are in an enforcing | |
8583 | context), ignore the overflow. */ | |
8584 | if (flag_permissive) | |
8585 | return *non_constant_p; | |
9e115cec | 8586 | } |
81ede53a | 8587 | *overflow_p = true; |
c41095db GDR |
8588 | } |
8589 | return *non_constant_p; | |
8590 | } | |
c41095db GDR |
8591 | |
8592 | /* Subroutine of cxx_eval_constant_expression. | |
8593 | Attempt to reduce the unary expression tree T to a compile time value. | |
8594 | If successful, return the value. Otherwise issue a diagnostic | |
8595 | and return error_mark_node. */ | |
8596 | ||
8597 | static tree | |
8598 | cxx_eval_unary_expression (const constexpr_call *call, tree t, | |
8599 | bool allow_non_constant, bool addr, | |
81ede53a | 8600 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
8601 | { |
8602 | tree r; | |
8603 | tree orig_arg = TREE_OPERAND (t, 0); | |
8604 | tree arg = cxx_eval_constant_expression (call, orig_arg, allow_non_constant, | |
81ede53a | 8605 | addr, non_constant_p, overflow_p); |
c41095db GDR |
8606 | VERIFY_CONSTANT (arg); |
8607 | if (arg == orig_arg) | |
8608 | return t; | |
8609 | r = fold_build1 (TREE_CODE (t), TREE_TYPE (t), arg); | |
8610 | VERIFY_CONSTANT (r); | |
8611 | return r; | |
8612 | } | |
8613 | ||
8614 | /* Subroutine of cxx_eval_constant_expression. | |
8615 | Like cxx_eval_unary_expression, except for binary expressions. */ | |
8616 | ||
8617 | static tree | |
8618 | cxx_eval_binary_expression (const constexpr_call *call, tree t, | |
8619 | bool allow_non_constant, bool addr, | |
81ede53a | 8620 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
8621 | { |
8622 | tree r; | |
8623 | tree orig_lhs = TREE_OPERAND (t, 0); | |
8624 | tree orig_rhs = TREE_OPERAND (t, 1); | |
8625 | tree lhs, rhs; | |
8626 | lhs = cxx_eval_constant_expression (call, orig_lhs, | |
8627 | allow_non_constant, addr, | |
81ede53a | 8628 | non_constant_p, overflow_p); |
c41095db GDR |
8629 | VERIFY_CONSTANT (lhs); |
8630 | rhs = cxx_eval_constant_expression (call, orig_rhs, | |
8631 | allow_non_constant, addr, | |
81ede53a | 8632 | non_constant_p, overflow_p); |
c41095db GDR |
8633 | VERIFY_CONSTANT (rhs); |
8634 | if (lhs == orig_lhs && rhs == orig_rhs) | |
8635 | return t; | |
8636 | r = fold_build2 (TREE_CODE (t), TREE_TYPE (t), lhs, rhs); | |
8637 | VERIFY_CONSTANT (r); | |
8638 | return r; | |
8639 | } | |
8640 | ||
8641 | /* Subroutine of cxx_eval_constant_expression. | |
8642 | Attempt to evaluate condition expressions. Dead branches are not | |
8643 | looked into. */ | |
8644 | ||
8645 | static tree | |
8646 | cxx_eval_conditional_expression (const constexpr_call *call, tree t, | |
8647 | bool allow_non_constant, bool addr, | |
81ede53a | 8648 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
8649 | { |
8650 | tree val = cxx_eval_constant_expression (call, TREE_OPERAND (t, 0), | |
8651 | allow_non_constant, addr, | |
81ede53a | 8652 | non_constant_p, overflow_p); |
c41095db | 8653 | VERIFY_CONSTANT (val); |
9e33e321 JM |
8654 | /* Don't VERIFY_CONSTANT the other operands. */ |
8655 | if (integer_zerop (val)) | |
8656 | return cxx_eval_constant_expression (call, TREE_OPERAND (t, 2), | |
c41095db | 8657 | allow_non_constant, addr, |
81ede53a | 8658 | non_constant_p, overflow_p); |
9e33e321 | 8659 | return cxx_eval_constant_expression (call, TREE_OPERAND (t, 1), |
c41095db | 8660 | allow_non_constant, addr, |
81ede53a | 8661 | non_constant_p, overflow_p); |
c41095db GDR |
8662 | } |
8663 | ||
8664 | /* Subroutine of cxx_eval_constant_expression. | |
8665 | Attempt to reduce a reference to an array slot. */ | |
8666 | ||
8667 | static tree | |
8668 | cxx_eval_array_reference (const constexpr_call *call, tree t, | |
8669 | bool allow_non_constant, bool addr, | |
81ede53a | 8670 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
8671 | { |
8672 | tree oldary = TREE_OPERAND (t, 0); | |
8673 | tree ary = cxx_eval_constant_expression (call, oldary, | |
8674 | allow_non_constant, addr, | |
81ede53a | 8675 | non_constant_p, overflow_p); |
c41095db GDR |
8676 | tree index, oldidx; |
8677 | HOST_WIDE_INT i; | |
c80e3e02 | 8678 | tree elem_type; |
9c76a19e | 8679 | unsigned len, elem_nchars = 1; |
c41095db GDR |
8680 | if (*non_constant_p) |
8681 | return t; | |
8682 | oldidx = TREE_OPERAND (t, 1); | |
8683 | index = cxx_eval_constant_expression (call, oldidx, | |
8684 | allow_non_constant, false, | |
81ede53a | 8685 | non_constant_p, overflow_p); |
c41095db GDR |
8686 | VERIFY_CONSTANT (index); |
8687 | if (addr && ary == oldary && index == oldidx) | |
8688 | return t; | |
8689 | else if (addr) | |
8690 | return build4 (ARRAY_REF, TREE_TYPE (t), ary, index, NULL, NULL); | |
c80e3e02 | 8691 | elem_type = TREE_TYPE (TREE_TYPE (ary)); |
9c76a19e JJ |
8692 | if (TREE_CODE (ary) == CONSTRUCTOR) |
8693 | len = CONSTRUCTOR_NELTS (ary); | |
5c67ef9a | 8694 | else if (TREE_CODE (ary) == STRING_CST) |
9c76a19e | 8695 | { |
c80e3e02 | 8696 | elem_nchars = (TYPE_PRECISION (elem_type) |
9c76a19e JJ |
8697 | / TYPE_PRECISION (char_type_node)); |
8698 | len = (unsigned) TREE_STRING_LENGTH (ary) / elem_nchars; | |
8699 | } | |
5c67ef9a JM |
8700 | else |
8701 | { | |
8702 | /* We can't do anything with other tree codes, so use | |
8703 | VERIFY_CONSTANT to complain and fail. */ | |
8704 | VERIFY_CONSTANT (ary); | |
8705 | gcc_unreachable (); | |
8706 | } | |
c41095db GDR |
8707 | if (compare_tree_int (index, len) >= 0) |
8708 | { | |
c80e3e02 JM |
8709 | if (tree_int_cst_lt (index, array_type_nelts_top (TREE_TYPE (ary)))) |
8710 | { | |
8711 | /* If it's within the array bounds but doesn't have an explicit | |
8712 | initializer, it's value-initialized. */ | |
8713 | tree val = build_value_init (elem_type, tf_warning_or_error); | |
8714 | return cxx_eval_constant_expression (call, val, | |
8715 | allow_non_constant, addr, | |
81ede53a | 8716 | non_constant_p, overflow_p); |
c80e3e02 JM |
8717 | } |
8718 | ||
c41095db GDR |
8719 | if (!allow_non_constant) |
8720 | error ("array subscript out of bound"); | |
8721 | *non_constant_p = true; | |
8722 | return t; | |
8723 | } | |
9a54d96a PC |
8724 | else if (tree_int_cst_lt (index, integer_zero_node)) |
8725 | { | |
8726 | if (!allow_non_constant) | |
8727 | error ("negative array subscript"); | |
8728 | *non_constant_p = true; | |
8729 | return t; | |
8730 | } | |
9439e9a1 | 8731 | i = tree_to_shwi (index); |
c41095db | 8732 | if (TREE_CODE (ary) == CONSTRUCTOR) |
9771b263 | 8733 | return (*CONSTRUCTOR_ELTS (ary))[i].value; |
9c76a19e | 8734 | else if (elem_nchars == 1) |
c41095db GDR |
8735 | return build_int_cst (cv_unqualified (TREE_TYPE (TREE_TYPE (ary))), |
8736 | TREE_STRING_POINTER (ary)[i]); | |
9c76a19e JJ |
8737 | else |
8738 | { | |
8739 | tree type = cv_unqualified (TREE_TYPE (TREE_TYPE (ary))); | |
8740 | return native_interpret_expr (type, (const unsigned char *) | |
8741 | TREE_STRING_POINTER (ary) | |
8742 | + i * elem_nchars, elem_nchars); | |
8743 | } | |
c41095db GDR |
8744 | /* Don't VERIFY_CONSTANT here. */ |
8745 | } | |
8746 | ||
8747 | /* Subroutine of cxx_eval_constant_expression. | |
8748 | Attempt to reduce a field access of a value of class type. */ | |
8749 | ||
8750 | static tree | |
8751 | cxx_eval_component_reference (const constexpr_call *call, tree t, | |
8752 | bool allow_non_constant, bool addr, | |
81ede53a | 8753 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
8754 | { |
8755 | unsigned HOST_WIDE_INT i; | |
8756 | tree field; | |
8757 | tree value; | |
8758 | tree part = TREE_OPERAND (t, 1); | |
8759 | tree orig_whole = TREE_OPERAND (t, 0); | |
8760 | tree whole = cxx_eval_constant_expression (call, orig_whole, | |
8761 | allow_non_constant, addr, | |
81ede53a | 8762 | non_constant_p, overflow_p); |
c41095db GDR |
8763 | if (whole == orig_whole) |
8764 | return t; | |
8765 | if (addr) | |
8766 | return fold_build3 (COMPONENT_REF, TREE_TYPE (t), | |
8767 | whole, part, NULL_TREE); | |
8768 | /* Don't VERIFY_CONSTANT here; we only want to check that we got a | |
8769 | CONSTRUCTOR. */ | |
8770 | if (!*non_constant_p && TREE_CODE (whole) != CONSTRUCTOR) | |
8771 | { | |
8772 | if (!allow_non_constant) | |
8773 | error ("%qE is not a constant expression", orig_whole); | |
8774 | *non_constant_p = true; | |
8775 | } | |
53b51666 JM |
8776 | if (DECL_MUTABLE_P (part)) |
8777 | { | |
8778 | if (!allow_non_constant) | |
8779 | error ("mutable %qD is not usable in a constant expression", part); | |
8780 | *non_constant_p = true; | |
8781 | } | |
c41095db GDR |
8782 | if (*non_constant_p) |
8783 | return t; | |
8784 | FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (whole), i, field, value) | |
8785 | { | |
8786 | if (field == part) | |
8787 | return value; | |
8788 | } | |
d05da2b9 JM |
8789 | if (TREE_CODE (TREE_TYPE (whole)) == UNION_TYPE |
8790 | && CONSTRUCTOR_NELTS (whole) > 0) | |
c41095db | 8791 | { |
e618eb62 | 8792 | /* DR 1188 says we don't have to deal with this. */ |
c41095db GDR |
8793 | if (!allow_non_constant) |
8794 | error ("accessing %qD member instead of initialized %qD member in " | |
8795 | "constant expression", part, CONSTRUCTOR_ELT (whole, 0)->index); | |
8796 | *non_constant_p = true; | |
8797 | return t; | |
8798 | } | |
d05da2b9 JM |
8799 | |
8800 | /* If there's no explicit init for this field, it's value-initialized. */ | |
8801 | value = build_value_init (TREE_TYPE (t), tf_warning_or_error); | |
8802 | return cxx_eval_constant_expression (call, value, | |
8803 | allow_non_constant, addr, | |
81ede53a | 8804 | non_constant_p, overflow_p); |
c41095db GDR |
8805 | } |
8806 | ||
4ddf1c7f JM |
8807 | /* Subroutine of cxx_eval_constant_expression. |
8808 | Attempt to reduce a field access of a value of class type that is | |
8809 | expressed as a BIT_FIELD_REF. */ | |
8810 | ||
8811 | static tree | |
8812 | cxx_eval_bit_field_ref (const constexpr_call *call, tree t, | |
8813 | bool allow_non_constant, bool addr, | |
81ede53a | 8814 | bool *non_constant_p, bool *overflow_p) |
4ddf1c7f JM |
8815 | { |
8816 | tree orig_whole = TREE_OPERAND (t, 0); | |
98933689 JJ |
8817 | tree retval, fldval, utype, mask; |
8818 | bool fld_seen = false; | |
8819 | HOST_WIDE_INT istart, isize; | |
4ddf1c7f JM |
8820 | tree whole = cxx_eval_constant_expression (call, orig_whole, |
8821 | allow_non_constant, addr, | |
81ede53a | 8822 | non_constant_p, overflow_p); |
4ddf1c7f JM |
8823 | tree start, field, value; |
8824 | unsigned HOST_WIDE_INT i; | |
8825 | ||
8826 | if (whole == orig_whole) | |
8827 | return t; | |
8828 | /* Don't VERIFY_CONSTANT here; we only want to check that we got a | |
8829 | CONSTRUCTOR. */ | |
40e0364c MG |
8830 | if (!*non_constant_p |
8831 | && TREE_CODE (whole) != VECTOR_CST | |
8832 | && TREE_CODE (whole) != CONSTRUCTOR) | |
4ddf1c7f JM |
8833 | { |
8834 | if (!allow_non_constant) | |
8835 | error ("%qE is not a constant expression", orig_whole); | |
8836 | *non_constant_p = true; | |
8837 | } | |
8838 | if (*non_constant_p) | |
8839 | return t; | |
8840 | ||
40e0364c MG |
8841 | if (TREE_CODE (whole) == VECTOR_CST) |
8842 | return fold_ternary (BIT_FIELD_REF, TREE_TYPE (t), whole, | |
8843 | TREE_OPERAND (t, 1), TREE_OPERAND (t, 2)); | |
8844 | ||
4ddf1c7f | 8845 | start = TREE_OPERAND (t, 2); |
9439e9a1 RS |
8846 | istart = tree_to_shwi (start); |
8847 | isize = tree_to_shwi (TREE_OPERAND (t, 1)); | |
98933689 JJ |
8848 | utype = TREE_TYPE (t); |
8849 | if (!TYPE_UNSIGNED (utype)) | |
8850 | utype = build_nonstandard_integer_type (TYPE_PRECISION (utype), 1); | |
8851 | retval = build_int_cst (utype, 0); | |
4ddf1c7f JM |
8852 | FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (whole), i, field, value) |
8853 | { | |
98933689 JJ |
8854 | tree bitpos = bit_position (field); |
8855 | if (bitpos == start && DECL_SIZE (field) == TREE_OPERAND (t, 1)) | |
4ddf1c7f | 8856 | return value; |
98933689 JJ |
8857 | if (TREE_CODE (TREE_TYPE (field)) == INTEGER_TYPE |
8858 | && TREE_CODE (value) == INTEGER_CST | |
9541ffee RS |
8859 | && tree_fits_shwi_p (bitpos) |
8860 | && tree_fits_shwi_p (DECL_SIZE (field))) | |
98933689 | 8861 | { |
9439e9a1 RS |
8862 | HOST_WIDE_INT bit = tree_to_shwi (bitpos); |
8863 | HOST_WIDE_INT sz = tree_to_shwi (DECL_SIZE (field)); | |
98933689 JJ |
8864 | HOST_WIDE_INT shift; |
8865 | if (bit >= istart && bit + sz <= istart + isize) | |
8866 | { | |
8867 | fldval = fold_convert (utype, value); | |
8868 | mask = build_int_cst_type (utype, -1); | |
8869 | mask = fold_build2 (LSHIFT_EXPR, utype, mask, | |
8870 | size_int (TYPE_PRECISION (utype) - sz)); | |
8871 | mask = fold_build2 (RSHIFT_EXPR, utype, mask, | |
8872 | size_int (TYPE_PRECISION (utype) - sz)); | |
8873 | fldval = fold_build2 (BIT_AND_EXPR, utype, fldval, mask); | |
8874 | shift = bit - istart; | |
8875 | if (BYTES_BIG_ENDIAN) | |
8876 | shift = TYPE_PRECISION (utype) - shift - sz; | |
8877 | fldval = fold_build2 (LSHIFT_EXPR, utype, fldval, | |
8878 | size_int (shift)); | |
8879 | retval = fold_build2 (BIT_IOR_EXPR, utype, retval, fldval); | |
8880 | fld_seen = true; | |
8881 | } | |
8882 | } | |
4ddf1c7f | 8883 | } |
98933689 JJ |
8884 | if (fld_seen) |
8885 | return fold_convert (TREE_TYPE (t), retval); | |
8886 | gcc_unreachable (); | |
4ddf1c7f JM |
8887 | return error_mark_node; |
8888 | } | |
8889 | ||
c41095db GDR |
8890 | /* Subroutine of cxx_eval_constant_expression. |
8891 | Evaluate a short-circuited logical expression T in the context | |
8892 | of a given constexpr CALL. BAILOUT_VALUE is the value for | |
8893 | early return. CONTINUE_VALUE is used here purely for | |
8894 | sanity check purposes. */ | |
8895 | ||
8896 | static tree | |
8897 | cxx_eval_logical_expression (const constexpr_call *call, tree t, | |
8898 | tree bailout_value, tree continue_value, | |
8899 | bool allow_non_constant, bool addr, | |
81ede53a | 8900 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
8901 | { |
8902 | tree r; | |
8903 | tree lhs = cxx_eval_constant_expression (call, TREE_OPERAND (t, 0), | |
8904 | allow_non_constant, addr, | |
81ede53a | 8905 | non_constant_p, overflow_p); |
c41095db | 8906 | VERIFY_CONSTANT (lhs); |
15442c9c | 8907 | if (tree_int_cst_equal (lhs, bailout_value)) |
c41095db | 8908 | return lhs; |
15442c9c | 8909 | gcc_assert (tree_int_cst_equal (lhs, continue_value)); |
c41095db | 8910 | r = cxx_eval_constant_expression (call, TREE_OPERAND (t, 1), |
81ede53a | 8911 | allow_non_constant, addr, non_constant_p, overflow_p); |
c41095db GDR |
8912 | VERIFY_CONSTANT (r); |
8913 | return r; | |
8914 | } | |
8915 | ||
d79b88a1 JM |
8916 | /* REF is a COMPONENT_REF designating a particular field. V is a vector of |
8917 | CONSTRUCTOR elements to initialize (part of) an object containing that | |
8918 | field. Return a pointer to the constructor_elt corresponding to the | |
8919 | initialization of the field. */ | |
8920 | ||
8921 | static constructor_elt * | |
9771b263 | 8922 | base_field_constructor_elt (vec<constructor_elt, va_gc> *v, tree ref) |
d79b88a1 JM |
8923 | { |
8924 | tree aggr = TREE_OPERAND (ref, 0); | |
8925 | tree field = TREE_OPERAND (ref, 1); | |
8926 | HOST_WIDE_INT i; | |
8927 | constructor_elt *ce; | |
8928 | ||
8929 | gcc_assert (TREE_CODE (ref) == COMPONENT_REF); | |
8930 | ||
8931 | if (TREE_CODE (aggr) == COMPONENT_REF) | |
8932 | { | |
8933 | constructor_elt *base_ce | |
8934 | = base_field_constructor_elt (v, aggr); | |
8935 | v = CONSTRUCTOR_ELTS (base_ce->value); | |
8936 | } | |
8937 | ||
9771b263 | 8938 | for (i = 0; vec_safe_iterate (v, i, &ce); ++i) |
d79b88a1 JM |
8939 | if (ce->index == field) |
8940 | return ce; | |
8941 | ||
8942 | gcc_unreachable (); | |
8943 | return NULL; | |
8944 | } | |
8945 | ||
c41095db GDR |
8946 | /* Subroutine of cxx_eval_constant_expression. |
8947 | The expression tree T denotes a C-style array or a C-style | |
8948 | aggregate. Reduce it to a constant expression. */ | |
8949 | ||
8950 | static tree | |
8951 | cxx_eval_bare_aggregate (const constexpr_call *call, tree t, | |
8952 | bool allow_non_constant, bool addr, | |
81ede53a | 8953 | bool *non_constant_p, bool *overflow_p) |
c41095db | 8954 | { |
9771b263 DN |
8955 | vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (t); |
8956 | vec<constructor_elt, va_gc> *n; | |
8957 | vec_alloc (n, vec_safe_length (v)); | |
c41095db GDR |
8958 | constructor_elt *ce; |
8959 | HOST_WIDE_INT i; | |
8960 | bool changed = false; | |
c41095db | 8961 | gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (t)); |
9771b263 | 8962 | for (i = 0; vec_safe_iterate (v, i, &ce); ++i) |
c41095db GDR |
8963 | { |
8964 | tree elt = cxx_eval_constant_expression (call, ce->value, | |
8965 | allow_non_constant, addr, | |
81ede53a | 8966 | non_constant_p, overflow_p); |
c41095db GDR |
8967 | /* Don't VERIFY_CONSTANT here. */ |
8968 | if (allow_non_constant && *non_constant_p) | |
8969 | goto fail; | |
8970 | if (elt != ce->value) | |
8971 | changed = true; | |
4eab75dd | 8972 | if (ce->index && TREE_CODE (ce->index) == COMPONENT_REF) |
c41095db | 8973 | { |
d79b88a1 JM |
8974 | /* This is an initialization of a vfield inside a base |
8975 | subaggregate that we already initialized; push this | |
8976 | initialization into the previous initialization. */ | |
8977 | constructor_elt *inner = base_field_constructor_elt (n, ce->index); | |
8978 | inner->value = elt; | |
c41095db | 8979 | } |
2e8e74c0 JM |
8980 | else if (ce->index |
8981 | && (TREE_CODE (ce->index) == NOP_EXPR | |
8982 | || TREE_CODE (ce->index) == POINTER_PLUS_EXPR)) | |
72de8622 JM |
8983 | { |
8984 | /* This is an initializer for an empty base; now that we've | |
8985 | checked that it's constant, we can ignore it. */ | |
8986 | gcc_assert (is_empty_class (TREE_TYPE (TREE_TYPE (ce->index)))); | |
8987 | } | |
c41095db GDR |
8988 | else |
8989 | CONSTRUCTOR_APPEND_ELT (n, ce->index, elt); | |
8990 | } | |
8991 | if (*non_constant_p || !changed) | |
8992 | { | |
8993 | fail: | |
9771b263 | 8994 | vec_free (n); |
c41095db GDR |
8995 | return t; |
8996 | } | |
8997 | t = build_constructor (TREE_TYPE (t), n); | |
8998 | TREE_CONSTANT (t) = true; | |
4eab75dd MG |
8999 | if (TREE_CODE (TREE_TYPE (t)) == VECTOR_TYPE) |
9000 | t = fold (t); | |
c41095db GDR |
9001 | return t; |
9002 | } | |
9003 | ||
9004 | /* Subroutine of cxx_eval_constant_expression. | |
9005 | The expression tree T is a VEC_INIT_EXPR which denotes the desired | |
9006 | initialization of a non-static data member of array type. Reduce it to a | |
9007 | CONSTRUCTOR. | |
9008 | ||
2b00e201 JM |
9009 | Note that apart from value-initialization (when VALUE_INIT is true), |
9010 | this is only intended to support value-initialization and the | |
9011 | initializations done by defaulted constructors for classes with | |
9012 | non-static data members of array type. In this case, VEC_INIT_EXPR_INIT | |
9013 | will either be NULL_TREE for the default constructor, or a COMPONENT_REF | |
9014 | for the copy/move constructor. */ | |
c41095db GDR |
9015 | |
9016 | static tree | |
9017 | cxx_eval_vec_init_1 (const constexpr_call *call, tree atype, tree init, | |
2b00e201 | 9018 | bool value_init, bool allow_non_constant, bool addr, |
81ede53a | 9019 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
9020 | { |
9021 | tree elttype = TREE_TYPE (atype); | |
9439e9a1 | 9022 | int max = tree_to_shwi (array_type_nelts (atype)); |
9771b263 DN |
9023 | vec<constructor_elt, va_gc> *n; |
9024 | vec_alloc (n, max + 1); | |
3748a54c | 9025 | bool pre_init = false; |
c41095db GDR |
9026 | int i; |
9027 | ||
9028 | /* For the default constructor, build up a call to the default | |
9029 | constructor of the element type. We only need to handle class types | |
9030 | here, as for a constructor to be constexpr, all members must be | |
9031 | initialized, which for a defaulted default constructor means they must | |
9032 | be of a class type with a constexpr default constructor. */ | |
3748a54c JM |
9033 | if (TREE_CODE (elttype) == ARRAY_TYPE) |
9034 | /* We only do this at the lowest level. */; | |
9035 | else if (value_init) | |
9036 | { | |
9037 | init = build_value_init (elttype, tf_warning_or_error); | |
9038 | init = cxx_eval_constant_expression | |
81ede53a | 9039 | (call, init, allow_non_constant, addr, non_constant_p, overflow_p); |
3748a54c JM |
9040 | pre_init = true; |
9041 | } | |
2b00e201 | 9042 | else if (!init) |
c41095db | 9043 | { |
9771b263 | 9044 | vec<tree, va_gc> *argvec = make_tree_vector (); |
c41095db GDR |
9045 | init = build_special_member_call (NULL_TREE, complete_ctor_identifier, |
9046 | &argvec, elttype, LOOKUP_NORMAL, | |
9047 | tf_warning_or_error); | |
9048 | release_tree_vector (argvec); | |
9049 | init = cxx_eval_constant_expression (call, init, allow_non_constant, | |
81ede53a | 9050 | addr, non_constant_p, overflow_p); |
3748a54c | 9051 | pre_init = true; |
c41095db GDR |
9052 | } |
9053 | ||
9054 | if (*non_constant_p && !allow_non_constant) | |
9055 | goto fail; | |
9056 | ||
9057 | for (i = 0; i <= max; ++i) | |
9058 | { | |
9059 | tree idx = build_int_cst (size_type_node, i); | |
9060 | tree eltinit; | |
9061 | if (TREE_CODE (elttype) == ARRAY_TYPE) | |
9062 | { | |
9063 | /* A multidimensional array; recurse. */ | |
23a3541f | 9064 | if (value_init || init == NULL_TREE) |
2b00e201 JM |
9065 | eltinit = NULL_TREE; |
9066 | else | |
9067 | eltinit = cp_build_array_ref (input_location, init, idx, | |
9068 | tf_warning_or_error); | |
9069 | eltinit = cxx_eval_vec_init_1 (call, elttype, eltinit, value_init, | |
c41095db | 9070 | allow_non_constant, addr, |
81ede53a | 9071 | non_constant_p, overflow_p); |
c41095db | 9072 | } |
3748a54c | 9073 | else if (pre_init) |
2b00e201 | 9074 | { |
3748a54c JM |
9075 | /* Initializing an element using value or default initialization |
9076 | we just pre-built above. */ | |
9077 | if (i == 0) | |
9078 | eltinit = init; | |
9079 | else | |
9080 | eltinit = unshare_expr (init); | |
c41095db GDR |
9081 | } |
9082 | else | |
9083 | { | |
9084 | /* Copying an element. */ | |
c41095db GDR |
9085 | gcc_assert (same_type_ignoring_top_level_qualifiers_p |
9086 | (atype, TREE_TYPE (init))); | |
9087 | eltinit = cp_build_array_ref (input_location, init, idx, | |
9088 | tf_warning_or_error); | |
9089 | if (!real_lvalue_p (init)) | |
9090 | eltinit = move (eltinit); | |
41852027 | 9091 | eltinit = force_rvalue (eltinit, tf_warning_or_error); |
c41095db | 9092 | eltinit = cxx_eval_constant_expression |
81ede53a | 9093 | (call, eltinit, allow_non_constant, addr, non_constant_p, overflow_p); |
c41095db GDR |
9094 | } |
9095 | if (*non_constant_p && !allow_non_constant) | |
9096 | goto fail; | |
9097 | CONSTRUCTOR_APPEND_ELT (n, idx, eltinit); | |
9098 | } | |
9099 | ||
9100 | if (!*non_constant_p) | |
9101 | { | |
1f291147 | 9102 | init = build_constructor (atype, n); |
c41095db GDR |
9103 | TREE_CONSTANT (init) = true; |
9104 | return init; | |
9105 | } | |
9106 | ||
9107 | fail: | |
9771b263 | 9108 | vec_free (n); |
c41095db GDR |
9109 | return init; |
9110 | } | |
9111 | ||
9112 | static tree | |
9113 | cxx_eval_vec_init (const constexpr_call *call, tree t, | |
9114 | bool allow_non_constant, bool addr, | |
81ede53a | 9115 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
9116 | { |
9117 | tree atype = TREE_TYPE (t); | |
9118 | tree init = VEC_INIT_EXPR_INIT (t); | |
2b00e201 JM |
9119 | tree r = cxx_eval_vec_init_1 (call, atype, init, |
9120 | VEC_INIT_EXPR_VALUE_INIT (t), | |
81ede53a | 9121 | allow_non_constant, addr, non_constant_p, overflow_p); |
c41095db GDR |
9122 | if (*non_constant_p) |
9123 | return t; | |
9124 | else | |
9125 | return r; | |
9126 | } | |
9127 | ||
9128 | /* A less strict version of fold_indirect_ref_1, which requires cv-quals to | |
9129 | match. We want to be less strict for simple *& folding; if we have a | |
9130 | non-const temporary that we access through a const pointer, that should | |
9131 | work. We handle this here rather than change fold_indirect_ref_1 | |
9132 | because we're dealing with things like ADDR_EXPR of INTEGER_CST which | |
9133 | don't really make sense outside of constant expression evaluation. Also | |
9134 | we want to allow folding to COMPONENT_REF, which could cause trouble | |
11f449ab JM |
9135 | with TBAA in fold_indirect_ref_1. |
9136 | ||
9137 | Try to keep this function synced with fold_indirect_ref_1. */ | |
c41095db GDR |
9138 | |
9139 | static tree | |
11f449ab | 9140 | cxx_fold_indirect_ref (location_t loc, tree type, tree op0, bool *empty_base) |
c41095db | 9141 | { |
11f449ab | 9142 | tree sub, subtype; |
c41095db | 9143 | |
c41095db | 9144 | sub = op0; |
c41095db GDR |
9145 | STRIP_NOPS (sub); |
9146 | subtype = TREE_TYPE (sub); | |
9a1cb58a MI |
9147 | if (!POINTER_TYPE_P (subtype)) |
9148 | return NULL_TREE; | |
c41095db GDR |
9149 | |
9150 | if (TREE_CODE (sub) == ADDR_EXPR) | |
9151 | { | |
9152 | tree op = TREE_OPERAND (sub, 0); | |
9153 | tree optype = TREE_TYPE (op); | |
9154 | ||
11f449ab JM |
9155 | /* *&CONST_DECL -> to the value of the const decl. */ |
9156 | if (TREE_CODE (op) == CONST_DECL) | |
9157 | return DECL_INITIAL (op); | |
9158 | /* *&p => p; make sure to handle *&"str"[cst] here. */ | |
c41095db | 9159 | if (same_type_ignoring_top_level_qualifiers_p (optype, type)) |
11f449ab JM |
9160 | { |
9161 | tree fop = fold_read_from_constant_string (op); | |
9162 | if (fop) | |
9163 | return fop; | |
9164 | else | |
9165 | return op; | |
9166 | } | |
9167 | /* *(foo *)&fooarray => fooarray[0] */ | |
9168 | else if (TREE_CODE (optype) == ARRAY_TYPE | |
9169 | && (same_type_ignoring_top_level_qualifiers_p | |
9170 | (type, TREE_TYPE (optype)))) | |
9171 | { | |
9172 | tree type_domain = TYPE_DOMAIN (optype); | |
9173 | tree min_val = size_zero_node; | |
9174 | if (type_domain && TYPE_MIN_VALUE (type_domain)) | |
9175 | min_val = TYPE_MIN_VALUE (type_domain); | |
9176 | return build4_loc (loc, ARRAY_REF, type, op, min_val, | |
9177 | NULL_TREE, NULL_TREE); | |
9178 | } | |
9179 | /* *(foo *)&complexfoo => __real__ complexfoo */ | |
9180 | else if (TREE_CODE (optype) == COMPLEX_TYPE | |
9181 | && (same_type_ignoring_top_level_qualifiers_p | |
9182 | (type, TREE_TYPE (optype)))) | |
9183 | return fold_build1_loc (loc, REALPART_EXPR, type, op); | |
9184 | /* *(foo *)&vectorfoo => BIT_FIELD_REF<vectorfoo,...> */ | |
9185 | else if (TREE_CODE (optype) == VECTOR_TYPE | |
9186 | && (same_type_ignoring_top_level_qualifiers_p | |
9187 | (type, TREE_TYPE (optype)))) | |
9188 | { | |
9189 | tree part_width = TYPE_SIZE (type); | |
9190 | tree index = bitsize_int (0); | |
9191 | return fold_build3_loc (loc, BIT_FIELD_REF, type, op, part_width, index); | |
9192 | } | |
c41095db GDR |
9193 | /* Also handle conversion to an empty base class, which |
9194 | is represented with a NOP_EXPR. */ | |
11f449ab | 9195 | else if (is_empty_class (type) |
c41095db GDR |
9196 | && CLASS_TYPE_P (optype) |
9197 | && DERIVED_FROM_P (type, optype)) | |
9198 | { | |
11f449ab JM |
9199 | *empty_base = true; |
9200 | return op; | |
c41095db GDR |
9201 | } |
9202 | /* *(foo *)&struct_with_foo_field => COMPONENT_REF */ | |
9203 | else if (RECORD_OR_UNION_TYPE_P (optype)) | |
9204 | { | |
9205 | tree field = TYPE_FIELDS (optype); | |
9206 | for (; field; field = DECL_CHAIN (field)) | |
9207 | if (TREE_CODE (field) == FIELD_DECL | |
9208 | && integer_zerop (byte_position (field)) | |
9209 | && (same_type_ignoring_top_level_qualifiers_p | |
9210 | (TREE_TYPE (field), type))) | |
9211 | { | |
11f449ab | 9212 | return fold_build3 (COMPONENT_REF, type, op, field, NULL_TREE); |
c41095db GDR |
9213 | break; |
9214 | } | |
9215 | } | |
9216 | } | |
9217 | else if (TREE_CODE (sub) == POINTER_PLUS_EXPR | |
9218 | && TREE_CODE (TREE_OPERAND (sub, 1)) == INTEGER_CST) | |
9219 | { | |
9220 | tree op00 = TREE_OPERAND (sub, 0); | |
9221 | tree op01 = TREE_OPERAND (sub, 1); | |
9222 | ||
9223 | STRIP_NOPS (op00); | |
9224 | if (TREE_CODE (op00) == ADDR_EXPR) | |
9225 | { | |
9226 | tree op00type; | |
9227 | op00 = TREE_OPERAND (op00, 0); | |
9228 | op00type = TREE_TYPE (op00); | |
9229 | ||
11f449ab JM |
9230 | /* ((foo*)&vectorfoo)[1] => BIT_FIELD_REF<vectorfoo,...> */ |
9231 | if (TREE_CODE (op00type) == VECTOR_TYPE | |
9232 | && (same_type_ignoring_top_level_qualifiers_p | |
9233 | (type, TREE_TYPE (op00type)))) | |
9234 | { | |
9439e9a1 | 9235 | HOST_WIDE_INT offset = tree_to_shwi (op01); |
11f449ab | 9236 | tree part_width = TYPE_SIZE (type); |
9439e9a1 | 9237 | unsigned HOST_WIDE_INT part_widthi = tree_to_shwi (part_width)/BITS_PER_UNIT; |
11f449ab JM |
9238 | unsigned HOST_WIDE_INT indexi = offset * BITS_PER_UNIT; |
9239 | tree index = bitsize_int (indexi); | |
9240 | ||
e934916c | 9241 | if (offset / part_widthi < TYPE_VECTOR_SUBPARTS (op00type)) |
11f449ab JM |
9242 | return fold_build3_loc (loc, |
9243 | BIT_FIELD_REF, type, op00, | |
9244 | part_width, index); | |
9245 | ||
9246 | } | |
9247 | /* ((foo*)&complexfoo)[1] => __imag__ complexfoo */ | |
9248 | else if (TREE_CODE (op00type) == COMPLEX_TYPE | |
9249 | && (same_type_ignoring_top_level_qualifiers_p | |
9250 | (type, TREE_TYPE (op00type)))) | |
9251 | { | |
9252 | tree size = TYPE_SIZE_UNIT (type); | |
9253 | if (tree_int_cst_equal (size, op01)) | |
9254 | return fold_build1_loc (loc, IMAGPART_EXPR, type, op00); | |
9255 | } | |
9256 | /* ((foo *)&fooarray)[1] => fooarray[1] */ | |
9257 | else if (TREE_CODE (op00type) == ARRAY_TYPE | |
9258 | && (same_type_ignoring_top_level_qualifiers_p | |
9259 | (type, TREE_TYPE (op00type)))) | |
9260 | { | |
9261 | tree type_domain = TYPE_DOMAIN (op00type); | |
9262 | tree min_val = size_zero_node; | |
9263 | if (type_domain && TYPE_MIN_VALUE (type_domain)) | |
9264 | min_val = TYPE_MIN_VALUE (type_domain); | |
9265 | op01 = size_binop_loc (loc, EXACT_DIV_EXPR, op01, | |
9266 | TYPE_SIZE_UNIT (type)); | |
9267 | op01 = size_binop_loc (loc, PLUS_EXPR, op01, min_val); | |
9268 | return build4_loc (loc, ARRAY_REF, type, op00, op01, | |
9269 | NULL_TREE, NULL_TREE); | |
9270 | } | |
58b922f8 JM |
9271 | /* Also handle conversion to an empty base class, which |
9272 | is represented with a NOP_EXPR. */ | |
9273 | else if (is_empty_class (type) | |
9274 | && CLASS_TYPE_P (op00type) | |
9275 | && DERIVED_FROM_P (type, op00type)) | |
9276 | { | |
9277 | *empty_base = true; | |
9278 | return op00; | |
9279 | } | |
c41095db | 9280 | /* ((foo *)&struct_with_foo_field)[1] => COMPONENT_REF */ |
11f449ab | 9281 | else if (RECORD_OR_UNION_TYPE_P (op00type)) |
c41095db GDR |
9282 | { |
9283 | tree field = TYPE_FIELDS (op00type); | |
9284 | for (; field; field = DECL_CHAIN (field)) | |
9285 | if (TREE_CODE (field) == FIELD_DECL | |
9286 | && tree_int_cst_equal (byte_position (field), op01) | |
9287 | && (same_type_ignoring_top_level_qualifiers_p | |
9288 | (TREE_TYPE (field), type))) | |
9289 | { | |
11f449ab | 9290 | return fold_build3 (COMPONENT_REF, type, op00, |
c41095db GDR |
9291 | field, NULL_TREE); |
9292 | break; | |
9293 | } | |
9294 | } | |
9295 | } | |
9296 | } | |
616eece3 | 9297 | /* *(foo *)fooarrptr => (*fooarrptr)[0] */ |
11f449ab JM |
9298 | else if (TREE_CODE (TREE_TYPE (subtype)) == ARRAY_TYPE |
9299 | && (same_type_ignoring_top_level_qualifiers_p | |
9300 | (type, TREE_TYPE (TREE_TYPE (subtype))))) | |
9301 | { | |
9302 | tree type_domain; | |
9303 | tree min_val = size_zero_node; | |
616eece3 JM |
9304 | tree newsub = cxx_fold_indirect_ref (loc, TREE_TYPE (subtype), sub, NULL); |
9305 | if (newsub) | |
9306 | sub = newsub; | |
9307 | else | |
11f449ab JM |
9308 | sub = build1_loc (loc, INDIRECT_REF, TREE_TYPE (subtype), sub); |
9309 | type_domain = TYPE_DOMAIN (TREE_TYPE (sub)); | |
9310 | if (type_domain && TYPE_MIN_VALUE (type_domain)) | |
9311 | min_val = TYPE_MIN_VALUE (type_domain); | |
9312 | return build4_loc (loc, ARRAY_REF, type, sub, min_val, NULL_TREE, | |
9313 | NULL_TREE); | |
9314 | } | |
c41095db | 9315 | |
11f449ab JM |
9316 | return NULL_TREE; |
9317 | } | |
9318 | ||
9319 | static tree | |
9320 | cxx_eval_indirect_ref (const constexpr_call *call, tree t, | |
9321 | bool allow_non_constant, bool addr, | |
81ede53a | 9322 | bool *non_constant_p, bool *overflow_p) |
11f449ab JM |
9323 | { |
9324 | tree orig_op0 = TREE_OPERAND (t, 0); | |
9325 | tree op0 = cxx_eval_constant_expression (call, orig_op0, allow_non_constant, | |
81ede53a | 9326 | /*addr*/false, non_constant_p, overflow_p); |
11f449ab JM |
9327 | bool empty_base = false; |
9328 | tree r; | |
9329 | ||
9330 | /* Don't VERIFY_CONSTANT here. */ | |
9331 | if (*non_constant_p) | |
9332 | return t; | |
9333 | ||
9334 | r = cxx_fold_indirect_ref (EXPR_LOCATION (t), TREE_TYPE (t), op0, | |
9335 | &empty_base); | |
9336 | ||
9337 | if (r) | |
c41095db | 9338 | r = cxx_eval_constant_expression (call, r, allow_non_constant, |
81ede53a | 9339 | addr, non_constant_p, overflow_p); |
11f449ab | 9340 | else |
c41095db | 9341 | { |
11f449ab JM |
9342 | tree sub = op0; |
9343 | STRIP_NOPS (sub); | |
da326566 JM |
9344 | if (TREE_CODE (sub) == ADDR_EXPR) |
9345 | { | |
9346 | /* We couldn't fold to a constant value. Make sure it's not | |
9347 | something we should have been able to fold. */ | |
11f449ab JM |
9348 | gcc_assert (!same_type_ignoring_top_level_qualifiers_p |
9349 | (TREE_TYPE (TREE_TYPE (sub)), TREE_TYPE (t))); | |
e618eb62 | 9350 | /* DR 1188 says we don't have to deal with this. */ |
11f449ab JM |
9351 | if (!allow_non_constant) |
9352 | error ("accessing value of %qE through a %qT glvalue in a " | |
9353 | "constant expression", build_fold_indirect_ref (sub), | |
9354 | TREE_TYPE (t)); | |
9355 | *non_constant_p = true; | |
9356 | return t; | |
9357 | } | |
c41095db GDR |
9358 | } |
9359 | ||
9360 | /* If we're pulling out the value of an empty base, make sure | |
9361 | that the whole object is constant and then return an empty | |
9362 | CONSTRUCTOR. */ | |
9363 | if (empty_base) | |
9364 | { | |
9365 | VERIFY_CONSTANT (r); | |
9366 | r = build_constructor (TREE_TYPE (t), NULL); | |
9367 | TREE_CONSTANT (r) = true; | |
9368 | } | |
9369 | ||
11f449ab | 9370 | if (r == NULL_TREE) |
9c7de5c6 | 9371 | { |
477e1843 JM |
9372 | if (addr && op0 != orig_op0) |
9373 | return build1 (INDIRECT_REF, TREE_TYPE (t), op0); | |
9c7de5c6 JM |
9374 | if (!addr) |
9375 | VERIFY_CONSTANT (t); | |
9376 | return t; | |
9377 | } | |
c41095db GDR |
9378 | return r; |
9379 | } | |
9380 | ||
acfd3fff JM |
9381 | /* Complain about R, a VAR_DECL, not being usable in a constant expression. |
9382 | Shared between potential_constant_expression and | |
9383 | cxx_eval_constant_expression. */ | |
9384 | ||
9385 | static void | |
9386 | non_const_var_error (tree r) | |
9387 | { | |
9388 | tree type = TREE_TYPE (r); | |
9389 | error ("the value of %qD is not usable in a constant " | |
9390 | "expression", r); | |
ef5daa25 JM |
9391 | /* Avoid error cascade. */ |
9392 | if (DECL_INITIAL (r) == error_mark_node) | |
9393 | return; | |
acfd3fff JM |
9394 | if (DECL_DECLARED_CONSTEXPR_P (r)) |
9395 | inform (DECL_SOURCE_LOCATION (r), | |
9396 | "%qD used in its own initializer", r); | |
9397 | else if (INTEGRAL_OR_ENUMERATION_TYPE_P (type)) | |
9398 | { | |
9399 | if (!CP_TYPE_CONST_P (type)) | |
9400 | inform (DECL_SOURCE_LOCATION (r), | |
9401 | "%q#D is not const", r); | |
9402 | else if (CP_TYPE_VOLATILE_P (type)) | |
9403 | inform (DECL_SOURCE_LOCATION (r), | |
9404 | "%q#D is volatile", r); | |
793fbf0b JM |
9405 | else if (!DECL_INITIAL (r) |
9406 | || !TREE_CONSTANT (DECL_INITIAL (r))) | |
acfd3fff JM |
9407 | inform (DECL_SOURCE_LOCATION (r), |
9408 | "%qD was not initialized with a constant " | |
9409 | "expression", r); | |
9410 | else | |
9411 | gcc_unreachable (); | |
9412 | } | |
9413 | else | |
9414 | { | |
604b2bfc | 9415 | if (cxx_dialect >= cxx11 && !DECL_DECLARED_CONSTEXPR_P (r)) |
acfd3fff JM |
9416 | inform (DECL_SOURCE_LOCATION (r), |
9417 | "%qD was not declared %<constexpr%>", r); | |
9418 | else | |
9419 | inform (DECL_SOURCE_LOCATION (r), | |
9420 | "%qD does not have integral or enumeration type", | |
9421 | r); | |
9422 | } | |
9423 | } | |
9424 | ||
f746a029 JM |
9425 | /* Subroutine of cxx_eval_constant_expression. |
9426 | Like cxx_eval_unary_expression, except for trinary expressions. */ | |
9427 | ||
c523fc89 | 9428 | static tree |
f746a029 JM |
9429 | cxx_eval_trinary_expression (const constexpr_call *call, tree t, |
9430 | bool allow_non_constant, bool addr, | |
9431 | bool *non_constant_p, bool *overflow_p) | |
c523fc89 RR |
9432 | { |
9433 | int i; | |
9434 | tree args[3]; | |
9435 | tree val; | |
c523fc89 RR |
9436 | |
9437 | for (i = 0; i < 3; i++) | |
9438 | { | |
9439 | args[i] = cxx_eval_constant_expression (call, TREE_OPERAND (t, i), | |
9440 | allow_non_constant, addr, | |
81ede53a | 9441 | non_constant_p, overflow_p); |
f746a029 | 9442 | VERIFY_CONSTANT (args[i]); |
c523fc89 RR |
9443 | } |
9444 | ||
f746a029 | 9445 | val = fold_ternary_loc (EXPR_LOCATION (t), TREE_CODE (t), TREE_TYPE (t), |
c523fc89 | 9446 | args[0], args[1], args[2]); |
f746a029 JM |
9447 | if (val == NULL_TREE) |
9448 | return t; | |
9449 | VERIFY_CONSTANT (val); | |
9450 | return val; | |
c523fc89 RR |
9451 | } |
9452 | ||
c41095db GDR |
9453 | /* Attempt to reduce the expression T to a constant value. |
9454 | On failure, issue diagnostic and return error_mark_node. */ | |
9455 | /* FIXME unify with c_fully_fold */ | |
9456 | ||
9457 | static tree | |
9458 | cxx_eval_constant_expression (const constexpr_call *call, tree t, | |
9459 | bool allow_non_constant, bool addr, | |
81ede53a | 9460 | bool *non_constant_p, bool *overflow_p) |
c41095db GDR |
9461 | { |
9462 | tree r = t; | |
9463 | ||
9464 | if (t == error_mark_node) | |
9465 | { | |
9466 | *non_constant_p = true; | |
9467 | return t; | |
9468 | } | |
9469 | if (CONSTANT_CLASS_P (t)) | |
9470 | { | |
9471 | if (TREE_CODE (t) == PTRMEM_CST) | |
9472 | t = cplus_expand_constant (t); | |
81ede53a JM |
9473 | else if (TREE_OVERFLOW (t) && (!flag_permissive || allow_non_constant)) |
9474 | *overflow_p = true; | |
c41095db GDR |
9475 | return t; |
9476 | } | |
9477 | if (TREE_CODE (t) != NOP_EXPR | |
9478 | && reduced_constant_expression_p (t)) | |
9479 | return fold (t); | |
9480 | ||
9481 | switch (TREE_CODE (t)) | |
9482 | { | |
9483 | case VAR_DECL: | |
9484 | if (addr) | |
9485 | return t; | |
9486 | /* else fall through. */ | |
9487 | case CONST_DECL: | |
9488 | r = integral_constant_value (t); | |
9489 | if (TREE_CODE (r) == TARGET_EXPR | |
9490 | && TREE_CODE (TARGET_EXPR_INITIAL (r)) == CONSTRUCTOR) | |
9491 | r = TARGET_EXPR_INITIAL (r); | |
9492 | if (DECL_P (r)) | |
9493 | { | |
9494 | if (!allow_non_constant) | |
acfd3fff | 9495 | non_const_var_error (r); |
c41095db GDR |
9496 | *non_constant_p = true; |
9497 | } | |
9498 | break; | |
9499 | ||
9500 | case FUNCTION_DECL: | |
f5ad54d7 | 9501 | case TEMPLATE_DECL: |
c41095db GDR |
9502 | case LABEL_DECL: |
9503 | return t; | |
9504 | ||
9505 | case PARM_DECL: | |
9506 | if (call && DECL_CONTEXT (t) == call->fundef->decl) | |
aee88012 JM |
9507 | { |
9508 | if (DECL_ARTIFICIAL (t) && DECL_CONSTRUCTOR_P (DECL_CONTEXT (t))) | |
9509 | { | |
9510 | if (!allow_non_constant) | |
9511 | sorry ("use of the value of the object being constructed " | |
9512 | "in a constant expression"); | |
9513 | *non_constant_p = true; | |
9514 | } | |
9515 | else | |
9516 | r = lookup_parameter_binding (call, t); | |
9517 | } | |
c41095db GDR |
9518 | else if (addr) |
9519 | /* Defer in case this is only used for its type. */; | |
9520 | else | |
9521 | { | |
9522 | if (!allow_non_constant) | |
9523 | error ("%qE is not a constant expression", t); | |
9524 | *non_constant_p = true; | |
9525 | } | |
9526 | break; | |
9527 | ||
9528 | case CALL_EXPR: | |
9529 | case AGGR_INIT_EXPR: | |
9530 | r = cxx_eval_call_expression (call, t, allow_non_constant, addr, | |
81ede53a | 9531 | non_constant_p, overflow_p); |
c41095db GDR |
9532 | break; |
9533 | ||
9534 | case TARGET_EXPR: | |
8c2f5419 | 9535 | if (!literal_type_p (TREE_TYPE (t))) |
07a9e891 JM |
9536 | { |
9537 | if (!allow_non_constant) | |
f732fa7b JM |
9538 | { |
9539 | error ("temporary of non-literal type %qT in a " | |
9540 | "constant expression", TREE_TYPE (t)); | |
9541 | explain_non_literal_class (TREE_TYPE (t)); | |
9542 | } | |
07a9e891 JM |
9543 | *non_constant_p = true; |
9544 | break; | |
9545 | } | |
9546 | /* else fall through. */ | |
c41095db GDR |
9547 | case INIT_EXPR: |
9548 | /* Pass false for 'addr' because these codes indicate | |
9549 | initialization of a temporary. */ | |
9550 | r = cxx_eval_constant_expression (call, TREE_OPERAND (t, 1), | |
9551 | allow_non_constant, false, | |
81ede53a | 9552 | non_constant_p, overflow_p); |
c41095db GDR |
9553 | if (!*non_constant_p) |
9554 | /* Adjust the type of the result to the type of the temporary. */ | |
9555 | r = adjust_temp_type (TREE_TYPE (t), r); | |
9556 | break; | |
9557 | ||
9558 | case SCOPE_REF: | |
9559 | r = cxx_eval_constant_expression (call, TREE_OPERAND (t, 1), | |
9560 | allow_non_constant, addr, | |
81ede53a | 9561 | non_constant_p, overflow_p); |
c41095db GDR |
9562 | break; |
9563 | ||
9564 | case RETURN_EXPR: | |
9565 | case NON_LVALUE_EXPR: | |
9566 | case TRY_CATCH_EXPR: | |
9567 | case CLEANUP_POINT_EXPR: | |
9568 | case MUST_NOT_THROW_EXPR: | |
9569 | case SAVE_EXPR: | |
9570 | r = cxx_eval_constant_expression (call, TREE_OPERAND (t, 0), | |
9571 | allow_non_constant, addr, | |
81ede53a | 9572 | non_constant_p, overflow_p); |
c41095db GDR |
9573 | break; |
9574 | ||
9575 | /* These differ from cxx_eval_unary_expression in that this doesn't | |
9576 | check for a constant operand or result; an address can be | |
9577 | constant without its operand being, and vice versa. */ | |
9578 | case INDIRECT_REF: | |
9579 | r = cxx_eval_indirect_ref (call, t, allow_non_constant, addr, | |
81ede53a | 9580 | non_constant_p, overflow_p); |
c41095db GDR |
9581 | break; |
9582 | ||
9583 | case ADDR_EXPR: | |
9584 | { | |
9585 | tree oldop = TREE_OPERAND (t, 0); | |
9586 | tree op = cxx_eval_constant_expression (call, oldop, | |
9587 | allow_non_constant, | |
9588 | /*addr*/true, | |
81ede53a | 9589 | non_constant_p, overflow_p); |
c41095db GDR |
9590 | /* Don't VERIFY_CONSTANT here. */ |
9591 | if (*non_constant_p) | |
9592 | return t; | |
9593 | /* This function does more aggressive folding than fold itself. */ | |
9594 | r = build_fold_addr_expr_with_type (op, TREE_TYPE (t)); | |
9595 | if (TREE_CODE (r) == ADDR_EXPR && TREE_OPERAND (r, 0) == oldop) | |
9596 | return t; | |
9597 | break; | |
9598 | } | |
9599 | ||
9600 | case REALPART_EXPR: | |
9601 | case IMAGPART_EXPR: | |
9602 | case CONJ_EXPR: | |
9603 | case FIX_TRUNC_EXPR: | |
9604 | case FLOAT_EXPR: | |
9605 | case NEGATE_EXPR: | |
9606 | case ABS_EXPR: | |
9607 | case BIT_NOT_EXPR: | |
9608 | case TRUTH_NOT_EXPR: | |
9609 | case FIXED_CONVERT_EXPR: | |
9610 | r = cxx_eval_unary_expression (call, t, allow_non_constant, addr, | |
81ede53a | 9611 | non_constant_p, overflow_p); |
c41095db GDR |
9612 | break; |
9613 | ||
0d23cf7a JJ |
9614 | case SIZEOF_EXPR: |
9615 | if (SIZEOF_EXPR_TYPE_P (t)) | |
9616 | r = cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (t, 0)), | |
9617 | SIZEOF_EXPR, false); | |
9618 | else if (TYPE_P (TREE_OPERAND (t, 0))) | |
9619 | r = cxx_sizeof_or_alignof_type (TREE_OPERAND (t, 0), SIZEOF_EXPR, | |
9620 | false); | |
9621 | else | |
9622 | r = cxx_sizeof_or_alignof_expr (TREE_OPERAND (t, 0), SIZEOF_EXPR, | |
9623 | false); | |
9624 | if (r == error_mark_node) | |
9625 | r = size_one_node; | |
9626 | VERIFY_CONSTANT (r); | |
9627 | break; | |
9628 | ||
c41095db GDR |
9629 | case COMPOUND_EXPR: |
9630 | { | |
9631 | /* check_return_expr sometimes wraps a TARGET_EXPR in a | |
9632 | COMPOUND_EXPR; don't get confused. Also handle EMPTY_CLASS_EXPR | |
9633 | introduced by build_call_a. */ | |
9634 | tree op0 = TREE_OPERAND (t, 0); | |
9635 | tree op1 = TREE_OPERAND (t, 1); | |
9636 | STRIP_NOPS (op1); | |
9637 | if ((TREE_CODE (op0) == TARGET_EXPR && op1 == TARGET_EXPR_SLOT (op0)) | |
9638 | || TREE_CODE (op1) == EMPTY_CLASS_EXPR) | |
9639 | r = cxx_eval_constant_expression (call, op0, allow_non_constant, | |
81ede53a | 9640 | addr, non_constant_p, overflow_p); |
c41095db | 9641 | else |
3f7c7453 JM |
9642 | { |
9643 | /* Check that the LHS is constant and then discard it. */ | |
9644 | cxx_eval_constant_expression (call, op0, allow_non_constant, | |
81ede53a | 9645 | false, non_constant_p, overflow_p); |
75ab707c | 9646 | op1 = TREE_OPERAND (t, 1); |
3f7c7453 | 9647 | r = cxx_eval_constant_expression (call, op1, allow_non_constant, |
81ede53a | 9648 | addr, non_constant_p, overflow_p); |
3f7c7453 | 9649 | } |
c41095db GDR |
9650 | } |
9651 | break; | |
9652 | ||
9653 | case POINTER_PLUS_EXPR: | |
9654 | case PLUS_EXPR: | |
9655 | case MINUS_EXPR: | |
9656 | case MULT_EXPR: | |
9657 | case TRUNC_DIV_EXPR: | |
9658 | case CEIL_DIV_EXPR: | |
9659 | case FLOOR_DIV_EXPR: | |
9660 | case ROUND_DIV_EXPR: | |
9661 | case TRUNC_MOD_EXPR: | |
9662 | case CEIL_MOD_EXPR: | |
9663 | case ROUND_MOD_EXPR: | |
9664 | case RDIV_EXPR: | |
9665 | case EXACT_DIV_EXPR: | |
9666 | case MIN_EXPR: | |
9667 | case MAX_EXPR: | |
9668 | case LSHIFT_EXPR: | |
9669 | case RSHIFT_EXPR: | |
9670 | case LROTATE_EXPR: | |
9671 | case RROTATE_EXPR: | |
9672 | case BIT_IOR_EXPR: | |
9673 | case BIT_XOR_EXPR: | |
9674 | case BIT_AND_EXPR: | |
9675 | case TRUTH_XOR_EXPR: | |
9676 | case LT_EXPR: | |
9677 | case LE_EXPR: | |
9678 | case GT_EXPR: | |
9679 | case GE_EXPR: | |
9680 | case EQ_EXPR: | |
9681 | case NE_EXPR: | |
9682 | case UNORDERED_EXPR: | |
9683 | case ORDERED_EXPR: | |
9684 | case UNLT_EXPR: | |
9685 | case UNLE_EXPR: | |
9686 | case UNGT_EXPR: | |
9687 | case UNGE_EXPR: | |
9688 | case UNEQ_EXPR: | |
da834cfc | 9689 | case LTGT_EXPR: |
c41095db GDR |
9690 | case RANGE_EXPR: |
9691 | case COMPLEX_EXPR: | |
c41095db | 9692 | r = cxx_eval_binary_expression (call, t, allow_non_constant, addr, |
81ede53a | 9693 | non_constant_p, overflow_p); |
c41095db GDR |
9694 | break; |
9695 | ||
9696 | /* fold can introduce non-IF versions of these; still treat them as | |
9697 | short-circuiting. */ | |
9698 | case TRUTH_AND_EXPR: | |
9699 | case TRUTH_ANDIF_EXPR: | |
9700 | r = cxx_eval_logical_expression (call, t, boolean_false_node, | |
9701 | boolean_true_node, | |
9702 | allow_non_constant, addr, | |
81ede53a | 9703 | non_constant_p, overflow_p); |
c41095db GDR |
9704 | break; |
9705 | ||
9706 | case TRUTH_OR_EXPR: | |
9707 | case TRUTH_ORIF_EXPR: | |
9708 | r = cxx_eval_logical_expression (call, t, boolean_true_node, | |
9709 | boolean_false_node, | |
9710 | allow_non_constant, addr, | |
81ede53a | 9711 | non_constant_p, overflow_p); |
c41095db GDR |
9712 | break; |
9713 | ||
9714 | case ARRAY_REF: | |
9715 | r = cxx_eval_array_reference (call, t, allow_non_constant, addr, | |
81ede53a | 9716 | non_constant_p, overflow_p); |
c41095db GDR |
9717 | break; |
9718 | ||
9719 | case COMPONENT_REF: | |
6f831b6d PC |
9720 | if (is_overloaded_fn (t)) |
9721 | { | |
9722 | /* We can only get here in checking mode via | |
9723 | build_non_dependent_expr, because any expression that | |
9724 | calls or takes the address of the function will have | |
9725 | pulled a FUNCTION_DECL out of the COMPONENT_REF. */ | |
a1535f52 | 9726 | gcc_checking_assert (allow_non_constant || errorcount); |
6f831b6d PC |
9727 | *non_constant_p = true; |
9728 | return t; | |
9729 | } | |
c41095db | 9730 | r = cxx_eval_component_reference (call, t, allow_non_constant, addr, |
81ede53a | 9731 | non_constant_p, overflow_p); |
c41095db GDR |
9732 | break; |
9733 | ||
4ddf1c7f JM |
9734 | case BIT_FIELD_REF: |
9735 | r = cxx_eval_bit_field_ref (call, t, allow_non_constant, addr, | |
81ede53a | 9736 | non_constant_p, overflow_p); |
4ddf1c7f JM |
9737 | break; |
9738 | ||
c41095db GDR |
9739 | case COND_EXPR: |
9740 | case VEC_COND_EXPR: | |
9741 | r = cxx_eval_conditional_expression (call, t, allow_non_constant, addr, | |
81ede53a | 9742 | non_constant_p, overflow_p); |
c41095db GDR |
9743 | break; |
9744 | ||
9745 | case CONSTRUCTOR: | |
9746 | r = cxx_eval_bare_aggregate (call, t, allow_non_constant, addr, | |
81ede53a | 9747 | non_constant_p, overflow_p); |
c41095db GDR |
9748 | break; |
9749 | ||
9750 | case VEC_INIT_EXPR: | |
9751 | /* We can get this in a defaulted constructor for a class with a | |
9752 | non-static data member of array type. Either the initializer will | |
9753 | be NULL, meaning default-initialization, or it will be an lvalue | |
9754 | or xvalue of the same type, meaning direct-initialization from the | |
9755 | corresponding member. */ | |
9756 | r = cxx_eval_vec_init (call, t, allow_non_constant, addr, | |
81ede53a | 9757 | non_constant_p, overflow_p); |
c41095db GDR |
9758 | break; |
9759 | ||
f746a029 | 9760 | case FMA_EXPR: |
c523fc89 | 9761 | case VEC_PERM_EXPR: |
f746a029 JM |
9762 | r = cxx_eval_trinary_expression (call, t, allow_non_constant, addr, |
9763 | non_constant_p, overflow_p); | |
c523fc89 RR |
9764 | break; |
9765 | ||
c41095db GDR |
9766 | case CONVERT_EXPR: |
9767 | case VIEW_CONVERT_EXPR: | |
9768 | case NOP_EXPR: | |
9769 | { | |
9770 | tree oldop = TREE_OPERAND (t, 0); | |
db327b64 PC |
9771 | tree op = cxx_eval_constant_expression (call, oldop, |
9772 | allow_non_constant, addr, | |
81ede53a | 9773 | non_constant_p, overflow_p); |
c41095db GDR |
9774 | if (*non_constant_p) |
9775 | return t; | |
477e1843 JM |
9776 | if (POINTER_TYPE_P (TREE_TYPE (t)) |
9777 | && TREE_CODE (op) == INTEGER_CST | |
9778 | && !integer_zerop (op)) | |
9779 | { | |
9780 | if (!allow_non_constant) | |
8400e75e | 9781 | error_at (EXPR_LOC_OR_LOC (t, input_location), |
477e1843 JM |
9782 | "reinterpret_cast from integer to pointer"); |
9783 | *non_constant_p = true; | |
9784 | return t; | |
9785 | } | |
c41095db GDR |
9786 | if (op == oldop) |
9787 | /* We didn't fold at the top so we could check for ptr-int | |
9788 | conversion. */ | |
9789 | return fold (t); | |
db327b64 | 9790 | r = fold_build1 (TREE_CODE (t), TREE_TYPE (t), op); |
c598e5fa JM |
9791 | /* Conversion of an out-of-range value has implementation-defined |
9792 | behavior; the language considers it different from arithmetic | |
9793 | overflow, which is undefined. */ | |
9794 | if (TREE_OVERFLOW_P (r) && !TREE_OVERFLOW_P (op)) | |
9795 | TREE_OVERFLOW (r) = false; | |
c41095db GDR |
9796 | } |
9797 | break; | |
9798 | ||
9799 | case EMPTY_CLASS_EXPR: | |
9800 | /* This is good enough for a function argument that might not get | |
9801 | used, and they can't do anything with it, so just return it. */ | |
9802 | return t; | |
9803 | ||
9804 | case LAMBDA_EXPR: | |
c41095db GDR |
9805 | case PREINCREMENT_EXPR: |
9806 | case POSTINCREMENT_EXPR: | |
9807 | case PREDECREMENT_EXPR: | |
9808 | case POSTDECREMENT_EXPR: | |
9809 | case NEW_EXPR: | |
9810 | case VEC_NEW_EXPR: | |
9811 | case DELETE_EXPR: | |
9812 | case VEC_DELETE_EXPR: | |
9813 | case THROW_EXPR: | |
9814 | case MODIFY_EXPR: | |
9815 | case MODOP_EXPR: | |
9816 | /* GCC internal stuff. */ | |
9817 | case VA_ARG_EXPR: | |
9818 | case OBJ_TYPE_REF: | |
9819 | case WITH_CLEANUP_EXPR: | |
9820 | case STATEMENT_LIST: | |
9821 | case BIND_EXPR: | |
9822 | case NON_DEPENDENT_EXPR: | |
9823 | case BASELINK: | |
9824 | case EXPR_STMT: | |
0eb35d46 | 9825 | case OFFSET_REF: |
c41095db | 9826 | if (!allow_non_constant) |
8400e75e | 9827 | error_at (EXPR_LOC_OR_LOC (t, input_location), |
c41095db GDR |
9828 | "expression %qE is not a constant-expression", t); |
9829 | *non_constant_p = true; | |
9830 | break; | |
9831 | ||
9832 | default: | |
9833 | internal_error ("unexpected expression %qE of kind %s", t, | |
5806f481 | 9834 | get_tree_code_name (TREE_CODE (t))); |
c41095db GDR |
9835 | *non_constant_p = true; |
9836 | break; | |
9837 | } | |
9838 | ||
9839 | if (r == error_mark_node) | |
9840 | *non_constant_p = true; | |
9841 | ||
9842 | if (*non_constant_p) | |
9843 | return t; | |
9844 | else | |
9845 | return r; | |
9846 | } | |
9847 | ||
9848 | static tree | |
9849 | cxx_eval_outermost_constant_expr (tree t, bool allow_non_constant) | |
9850 | { | |
9851 | bool non_constant_p = false; | |
81ede53a | 9852 | bool overflow_p = false; |
c41095db | 9853 | tree r = cxx_eval_constant_expression (NULL, t, allow_non_constant, |
81ede53a | 9854 | false, &non_constant_p, &overflow_p); |
c41095db | 9855 | |
81ede53a | 9856 | verify_constant (r, allow_non_constant, &non_constant_p, &overflow_p); |
c41095db | 9857 | |
53b51666 JM |
9858 | if (TREE_CODE (t) != CONSTRUCTOR |
9859 | && cp_has_mutable_p (TREE_TYPE (t))) | |
9860 | { | |
9861 | /* We allow a mutable type if the original expression was a | |
9862 | CONSTRUCTOR so that we can do aggregate initialization of | |
9863 | constexpr variables. */ | |
9864 | if (!allow_non_constant) | |
9865 | error ("%qT cannot be the type of a complete constant expression " | |
9866 | "because it has mutable sub-objects", TREE_TYPE (t)); | |
9867 | non_constant_p = true; | |
9868 | } | |
9869 | ||
37ef545a JM |
9870 | /* Technically we should check this for all subexpressions, but that |
9871 | runs into problems with our internal representation of pointer | |
9872 | subtraction and the 5.19 rules are still in flux. */ | |
9873 | if (CONVERT_EXPR_CODE_P (TREE_CODE (r)) | |
9874 | && ARITHMETIC_TYPE_P (TREE_TYPE (r)) | |
9875 | && TREE_CODE (TREE_OPERAND (r, 0)) == ADDR_EXPR) | |
9876 | { | |
9877 | if (!allow_non_constant) | |
9878 | error ("conversion from pointer type %qT " | |
9879 | "to arithmetic type %qT in a constant-expression", | |
9880 | TREE_TYPE (TREE_OPERAND (r, 0)), TREE_TYPE (r)); | |
9881 | non_constant_p = true; | |
9882 | } | |
9883 | ||
81ede53a JM |
9884 | if (!non_constant_p && overflow_p) |
9885 | non_constant_p = true; | |
9886 | ||
c41095db GDR |
9887 | if (non_constant_p && !allow_non_constant) |
9888 | return error_mark_node; | |
81ede53a | 9889 | else if (non_constant_p && TREE_CONSTANT (r)) |
c41095db GDR |
9890 | { |
9891 | /* This isn't actually constant, so unset TREE_CONSTANT. */ | |
81ede53a JM |
9892 | if (EXPR_P (r)) |
9893 | r = copy_node (r); | |
9894 | else if (TREE_CODE (r) == CONSTRUCTOR) | |
9895 | r = build1 (VIEW_CONVERT_EXPR, TREE_TYPE (r), r); | |
c41095db | 9896 | else |
81ede53a | 9897 | r = build_nop (TREE_TYPE (r), r); |
c41095db | 9898 | TREE_CONSTANT (r) = false; |
c41095db GDR |
9899 | } |
9900 | else if (non_constant_p || r == t) | |
9901 | return t; | |
81ede53a JM |
9902 | |
9903 | if (TREE_CODE (r) == CONSTRUCTOR && CLASS_TYPE_P (TREE_TYPE (r))) | |
c41095db GDR |
9904 | { |
9905 | if (TREE_CODE (t) == TARGET_EXPR | |
9906 | && TARGET_EXPR_INITIAL (t) == r) | |
9907 | return t; | |
9908 | else | |
9909 | { | |
9910 | r = get_target_expr (r); | |
9911 | TREE_CONSTANT (r) = true; | |
9912 | return r; | |
9913 | } | |
9914 | } | |
9915 | else | |
9916 | return r; | |
9917 | } | |
9918 | ||
fa2200cb JM |
9919 | /* Returns true if T is a valid subexpression of a constant expression, |
9920 | even if it isn't itself a constant expression. */ | |
9921 | ||
9922 | bool | |
9923 | is_sub_constant_expr (tree t) | |
9924 | { | |
9925 | bool non_constant_p = false; | |
81ede53a JM |
9926 | bool overflow_p = false; |
9927 | cxx_eval_constant_expression (NULL, t, true, false, &non_constant_p, | |
9928 | &overflow_p); | |
9929 | return !non_constant_p && !overflow_p; | |
fa2200cb JM |
9930 | } |
9931 | ||
c41095db GDR |
9932 | /* If T represents a constant expression returns its reduced value. |
9933 | Otherwise return error_mark_node. If T is dependent, then | |
9934 | return NULL. */ | |
9935 | ||
9936 | tree | |
9937 | cxx_constant_value (tree t) | |
9938 | { | |
9939 | return cxx_eval_outermost_constant_expr (t, false); | |
9940 | } | |
9941 | ||
9942 | /* If T is a constant expression, returns its reduced value. | |
9943 | Otherwise, if T does not have TREE_CONSTANT set, returns T. | |
9944 | Otherwise, returns a version of T without TREE_CONSTANT. */ | |
9945 | ||
9946 | tree | |
9947 | maybe_constant_value (tree t) | |
9948 | { | |
9949 | tree r; | |
9950 | ||
2ad8cf26 | 9951 | if (instantiation_dependent_expression_p (t) |
4be5e5b1 | 9952 | || type_unknown_p (t) |
27879147 | 9953 | || BRACE_ENCLOSED_INITIALIZER_P (t) |
2ad8cf26 | 9954 | || !potential_constant_expression (t)) |
793fbf0b JM |
9955 | { |
9956 | if (TREE_OVERFLOW_P (t)) | |
9957 | { | |
9958 | t = build_nop (TREE_TYPE (t), t); | |
9959 | TREE_CONSTANT (t) = false; | |
9960 | } | |
9961 | return t; | |
9962 | } | |
c41095db GDR |
9963 | |
9964 | r = cxx_eval_outermost_constant_expr (t, true); | |
9965 | #ifdef ENABLE_CHECKING | |
9966 | /* cp_tree_equal looks through NOPs, so allow them. */ | |
9967 | gcc_assert (r == t | |
9968 | || CONVERT_EXPR_P (t) | |
9969 | || (TREE_CONSTANT (t) && !TREE_CONSTANT (r)) | |
9970 | || !cp_tree_equal (r, t)); | |
9971 | #endif | |
9972 | return r; | |
9973 | } | |
9974 | ||
9975 | /* Like maybe_constant_value, but returns a CONSTRUCTOR directly, rather | |
9976 | than wrapped in a TARGET_EXPR. */ | |
9977 | ||
9978 | tree | |
9979 | maybe_constant_init (tree t) | |
9980 | { | |
c0014b07 JM |
9981 | if (TREE_CODE (t) == EXPR_STMT) |
9982 | t = TREE_OPERAND (t, 0); | |
9983 | if (TREE_CODE (t) == CONVERT_EXPR | |
9984 | && VOID_TYPE_P (TREE_TYPE (t))) | |
9985 | t = TREE_OPERAND (t, 0); | |
c41095db GDR |
9986 | t = maybe_constant_value (t); |
9987 | if (TREE_CODE (t) == TARGET_EXPR) | |
9988 | { | |
9989 | tree init = TARGET_EXPR_INITIAL (t); | |
81ede53a | 9990 | if (TREE_CODE (init) == CONSTRUCTOR) |
c41095db GDR |
9991 | t = init; |
9992 | } | |
9993 | return t; | |
9994 | } | |
9995 | ||
d6ed1c89 JM |
9996 | #if 0 |
9997 | /* FIXME see ADDR_EXPR section in potential_constant_expression_1. */ | |
66e61a34 JM |
9998 | /* Return true if the object referred to by REF has automatic or thread |
9999 | local storage. */ | |
7ecbca9d | 10000 | |
66e61a34 JM |
10001 | enum { ck_ok, ck_bad, ck_unknown }; |
10002 | static int | |
10003 | check_automatic_or_tls (tree ref) | |
10004 | { | |
10005 | enum machine_mode mode; | |
10006 | HOST_WIDE_INT bitsize, bitpos; | |
10007 | tree offset; | |
10008 | int volatilep = 0, unsignedp = 0; | |
10009 | tree decl = get_inner_reference (ref, &bitsize, &bitpos, &offset, | |
10010 | &mode, &unsignedp, &volatilep, false); | |
10011 | duration_kind dk; | |
10012 | ||
10013 | /* If there isn't a decl in the middle, we don't know the linkage here, | |
10014 | and this isn't a constant expression anyway. */ | |
10015 | if (!DECL_P (decl)) | |
10016 | return ck_unknown; | |
10017 | dk = decl_storage_duration (decl); | |
10018 | return (dk == dk_auto || dk == dk_thread) ? ck_bad : ck_ok; | |
10019 | } | |
d6ed1c89 | 10020 | #endif |
66e61a34 | 10021 | |
d6ed1c89 JM |
10022 | /* Return true if T denotes a potentially constant expression. Issue |
10023 | diagnostic as appropriate under control of FLAGS. If WANT_RVAL is true, | |
10024 | an lvalue-rvalue conversion is implied. | |
66e61a34 | 10025 | |
d6ed1c89 | 10026 | C++0x [expr.const] used to say |
66e61a34 JM |
10027 | |
10028 | 6 An expression is a potential constant expression if it is | |
c65cb8d1 | 10029 | a constant expression where all occurrences of function |
66e61a34 JM |
10030 | parameters are replaced by arbitrary constant expressions |
10031 | of the appropriate type. | |
10032 | ||
10033 | 2 A conditional expression is a constant expression unless it | |
10034 | involves one of the following as a potentially evaluated | |
10035 | subexpression (3.2), but subexpressions of logical AND (5.14), | |
10036 | logical OR (5.15), and conditional (5.16) operations that are | |
10037 | not evaluated are not considered. */ | |
10038 | ||
d6ed1c89 JM |
10039 | static bool |
10040 | potential_constant_expression_1 (tree t, bool want_rval, tsubst_flags_t flags) | |
66e61a34 | 10041 | { |
d6ed1c89 | 10042 | enum { any = false, rval = true }; |
66e61a34 JM |
10043 | int i; |
10044 | tree tmp; | |
d6ed1c89 | 10045 | |
66e61a34 JM |
10046 | if (t == error_mark_node) |
10047 | return false; | |
d6ed1c89 JM |
10048 | if (t == NULL_TREE) |
10049 | return true; | |
66e61a34 JM |
10050 | if (TREE_THIS_VOLATILE (t)) |
10051 | { | |
10052 | if (flags & tf_error) | |
10053 | error ("expression %qE has side-effects", t); | |
10054 | return false; | |
10055 | } | |
10056 | if (CONSTANT_CLASS_P (t)) | |
81ede53a | 10057 | return true; |
66e61a34 JM |
10058 | |
10059 | switch (TREE_CODE (t)) | |
10060 | { | |
10061 | case FUNCTION_DECL: | |
d6ed1c89 | 10062 | case BASELINK: |
5b883ca6 | 10063 | case TEMPLATE_DECL: |
d6ed1c89 JM |
10064 | case OVERLOAD: |
10065 | case TEMPLATE_ID_EXPR: | |
66e61a34 | 10066 | case LABEL_DECL: |
0eb3d6c6 | 10067 | case LABEL_EXPR: |
66e61a34 | 10068 | case CONST_DECL: |
d6ed1c89 JM |
10069 | case SIZEOF_EXPR: |
10070 | case ALIGNOF_EXPR: | |
10071 | case OFFSETOF_EXPR: | |
10072 | case NOEXCEPT_EXPR: | |
10073 | case TEMPLATE_PARM_INDEX: | |
10074 | case TRAIT_EXPR: | |
10075 | case IDENTIFIER_NODE: | |
3ce4f9e4 | 10076 | case USERDEF_LITERAL: |
a651bcbe JM |
10077 | /* We can see a FIELD_DECL in a pointer-to-member expression. */ |
10078 | case FIELD_DECL: | |
66e61a34 | 10079 | case PARM_DECL: |
ee71530f | 10080 | case USING_DECL: |
66e61a34 JM |
10081 | return true; |
10082 | ||
10083 | case AGGR_INIT_EXPR: | |
10084 | case CALL_EXPR: | |
10085 | /* -- an invocation of a function other than a constexpr function | |
10086 | or a constexpr constructor. */ | |
10087 | { | |
10088 | tree fun = get_function_named_in_call (t); | |
10089 | const int nargs = call_expr_nargs (t); | |
f5a28e87 JM |
10090 | i = 0; |
10091 | ||
10092 | if (is_overloaded_fn (fun)) | |
10093 | { | |
10094 | if (TREE_CODE (fun) == FUNCTION_DECL) | |
10095 | { | |
10096 | if (builtin_valid_in_constant_expr_p (fun)) | |
10097 | return true; | |
10098 | if (!DECL_DECLARED_CONSTEXPR_P (fun) | |
0701bb56 JM |
10099 | /* Allow any built-in function; if the expansion |
10100 | isn't constant, we'll deal with that then. */ | |
10101 | && !is_builtin_fn (fun)) | |
f5a28e87 JM |
10102 | { |
10103 | if (flags & tf_error) | |
f732fa7b | 10104 | { |
8400e75e | 10105 | error_at (EXPR_LOC_OR_LOC (t, input_location), |
f732fa7b JM |
10106 | "call to non-constexpr function %qD", fun); |
10107 | explain_invalid_constexpr_fn (fun); | |
10108 | } | |
f5a28e87 JM |
10109 | return false; |
10110 | } | |
10111 | /* A call to a non-static member function takes the address | |
10112 | of the object as the first argument. But in a constant | |
10113 | expression the address will be folded away, so look | |
10114 | through it now. */ | |
10115 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fun) | |
10116 | && !DECL_CONSTRUCTOR_P (fun)) | |
10117 | { | |
10118 | tree x = get_nth_callarg (t, 0); | |
10119 | if (is_this_parameter (x)) | |
b569be8c | 10120 | { |
cefb0898 JM |
10121 | if (DECL_CONTEXT (x) == NULL_TREE |
10122 | || DECL_CONSTRUCTOR_P (DECL_CONTEXT (x))) | |
b569be8c JM |
10123 | { |
10124 | if (flags & tf_error) | |
10125 | sorry ("calling a member function of the " | |
10126 | "object being constructed in a constant " | |
10127 | "expression"); | |
10128 | return false; | |
10129 | } | |
10130 | /* Otherwise OK. */; | |
10131 | } | |
f5a28e87 | 10132 | else if (!potential_constant_expression_1 (x, rval, flags)) |
f732fa7b | 10133 | return false; |
f5a28e87 JM |
10134 | i = 1; |
10135 | } | |
10136 | } | |
10137 | else | |
1a288768 JM |
10138 | { |
10139 | if (!potential_constant_expression_1 (fun, true, flags)) | |
10140 | return false; | |
10141 | fun = get_first_fn (fun); | |
10142 | } | |
f5a28e87 JM |
10143 | /* Skip initial arguments to base constructors. */ |
10144 | if (DECL_BASE_CONSTRUCTOR_P (fun)) | |
10145 | i = num_artificial_parms_for (fun); | |
10146 | fun = DECL_ORIGIN (fun); | |
10147 | } | |
66e61a34 | 10148 | else |
66e61a34 | 10149 | { |
f5a28e87 JM |
10150 | if (potential_constant_expression_1 (fun, rval, flags)) |
10151 | /* Might end up being a constant function pointer. */; | |
10152 | else | |
f732fa7b | 10153 | return false; |
66e61a34 JM |
10154 | } |
10155 | for (; i < nargs; ++i) | |
10156 | { | |
10157 | tree x = get_nth_callarg (t, i); | |
f5a28e87 | 10158 | if (!potential_constant_expression_1 (x, rval, flags)) |
f732fa7b | 10159 | return false; |
66e61a34 JM |
10160 | } |
10161 | return true; | |
10162 | } | |
10163 | ||
10164 | case NON_LVALUE_EXPR: | |
10165 | /* -- an lvalue-to-rvalue conversion (4.1) unless it is applied to | |
10166 | -- an lvalue of integral type that refers to a non-volatile | |
10167 | const variable or static data member initialized with | |
10168 | constant expressions, or | |
10169 | ||
10170 | -- an lvalue of literal type that refers to non-volatile | |
10171 | object defined with constexpr, or that refers to a | |
10172 | sub-object of such an object; */ | |
d6ed1c89 | 10173 | return potential_constant_expression_1 (TREE_OPERAND (t, 0), rval, flags); |
66e61a34 JM |
10174 | |
10175 | case VAR_DECL: | |
acfd3fff JM |
10176 | if (want_rval && !decl_constant_var_p (t) |
10177 | && !dependent_type_p (TREE_TYPE (t))) | |
66e61a34 JM |
10178 | { |
10179 | if (flags & tf_error) | |
acfd3fff | 10180 | non_const_var_error (t); |
66e61a34 JM |
10181 | return false; |
10182 | } | |
10183 | return true; | |
10184 | ||
10185 | case NOP_EXPR: | |
10186 | case CONVERT_EXPR: | |
10187 | case VIEW_CONVERT_EXPR: | |
37ef545a JM |
10188 | /* -- a reinterpret_cast. FIXME not implemented, and this rule |
10189 | may change to something more specific to type-punning (DR 1312). */ | |
66e61a34 JM |
10190 | { |
10191 | tree from = TREE_OPERAND (t, 0); | |
477e1843 JM |
10192 | if (POINTER_TYPE_P (TREE_TYPE (t)) |
10193 | && TREE_CODE (from) == INTEGER_CST | |
10194 | && !integer_zerop (from)) | |
10195 | { | |
10196 | if (flags & tf_error) | |
8400e75e | 10197 | error_at (EXPR_LOC_OR_LOC (t, input_location), |
477e1843 JM |
10198 | "reinterpret_cast from integer to pointer"); |
10199 | return false; | |
10200 | } | |
d6ed1c89 JM |
10201 | return (potential_constant_expression_1 |
10202 | (from, TREE_CODE (t) != VIEW_CONVERT_EXPR, flags)); | |
66e61a34 JM |
10203 | } |
10204 | ||
10205 | case ADDR_EXPR: | |
10206 | /* -- a unary operator & that is applied to an lvalue that | |
10207 | designates an object with thread or automatic storage | |
10208 | duration; */ | |
10209 | t = TREE_OPERAND (t, 0); | |
d6ed1c89 JM |
10210 | #if 0 |
10211 | /* FIXME adjust when issue 1197 is fully resolved. For now don't do | |
10212 | any checking here, as we might dereference the pointer later. If | |
10213 | we remove this code, also remove check_automatic_or_tls. */ | |
66e61a34 JM |
10214 | i = check_automatic_or_tls (t); |
10215 | if (i == ck_ok) | |
10216 | return true; | |
10217 | if (i == ck_bad) | |
10218 | { | |
10219 | if (flags & tf_error) | |
10220 | error ("address-of an object %qE with thread local or " | |
10221 | "automatic storage is not a constant expression", t); | |
10222 | return false; | |
10223 | } | |
d6ed1c89 JM |
10224 | #endif |
10225 | return potential_constant_expression_1 (t, any, flags); | |
66e61a34 JM |
10226 | |
10227 | case COMPONENT_REF: | |
10228 | case BIT_FIELD_REF: | |
d6ed1c89 JM |
10229 | case ARROW_EXPR: |
10230 | case OFFSET_REF: | |
66e61a34 JM |
10231 | /* -- a class member access unless its postfix-expression is |
10232 | of literal type or of pointer to literal type. */ | |
10233 | /* This test would be redundant, as it follows from the | |
10234 | postfix-expression being a potential constant expression. */ | |
d6ed1c89 JM |
10235 | return potential_constant_expression_1 (TREE_OPERAND (t, 0), |
10236 | want_rval, flags); | |
10237 | ||
10238 | case EXPR_PACK_EXPANSION: | |
10239 | return potential_constant_expression_1 (PACK_EXPANSION_PATTERN (t), | |
10240 | want_rval, flags); | |
66e61a34 JM |
10241 | |
10242 | case INDIRECT_REF: | |
10243 | { | |
10244 | tree x = TREE_OPERAND (t, 0); | |
10245 | STRIP_NOPS (x); | |
10246 | if (is_this_parameter (x)) | |
cb21e9cd | 10247 | { |
b7df43cd JM |
10248 | if (DECL_CONTEXT (x) |
10249 | && !DECL_DECLARED_CONSTEXPR_P (DECL_CONTEXT (x))) | |
10250 | { | |
10251 | if (flags & tf_error) | |
10252 | error ("use of %<this%> in a constant expression"); | |
10253 | return false; | |
10254 | } | |
f2fe30af JM |
10255 | if (want_rval && DECL_CONTEXT (x) |
10256 | && DECL_CONSTRUCTOR_P (DECL_CONTEXT (x))) | |
cb21e9cd JM |
10257 | { |
10258 | if (flags & tf_error) | |
00a0d6f3 JM |
10259 | sorry ("use of the value of the object being constructed " |
10260 | "in a constant expression"); | |
cb21e9cd JM |
10261 | return false; |
10262 | } | |
10263 | return true; | |
10264 | } | |
d6ed1c89 | 10265 | return potential_constant_expression_1 (x, rval, flags); |
66e61a34 JM |
10266 | } |
10267 | ||
10268 | case LAMBDA_EXPR: | |
10269 | case DYNAMIC_CAST_EXPR: | |
10270 | case PSEUDO_DTOR_EXPR: | |
10271 | case PREINCREMENT_EXPR: | |
10272 | case POSTINCREMENT_EXPR: | |
10273 | case PREDECREMENT_EXPR: | |
10274 | case POSTDECREMENT_EXPR: | |
10275 | case NEW_EXPR: | |
10276 | case VEC_NEW_EXPR: | |
10277 | case DELETE_EXPR: | |
10278 | case VEC_DELETE_EXPR: | |
10279 | case THROW_EXPR: | |
10280 | case MODIFY_EXPR: | |
10281 | case MODOP_EXPR: | |
da834cfc JM |
10282 | case OMP_ATOMIC: |
10283 | case OMP_ATOMIC_READ: | |
10284 | case OMP_ATOMIC_CAPTURE_OLD: | |
10285 | case OMP_ATOMIC_CAPTURE_NEW: | |
66e61a34 JM |
10286 | /* GCC internal stuff. */ |
10287 | case VA_ARG_EXPR: | |
10288 | case OBJ_TYPE_REF: | |
10289 | case WITH_CLEANUP_EXPR: | |
10290 | case CLEANUP_POINT_EXPR: | |
10291 | case MUST_NOT_THROW_EXPR: | |
10292 | case TRY_CATCH_EXPR: | |
10293 | case STATEMENT_LIST: | |
d6ed1c89 JM |
10294 | /* Don't bother trying to define a subset of statement-expressions to |
10295 | be constant-expressions, at least for now. */ | |
10296 | case STMT_EXPR: | |
10297 | case EXPR_STMT: | |
66e61a34 | 10298 | case BIND_EXPR: |
0a35513e | 10299 | case TRANSACTION_EXPR: |
3afeafbc PC |
10300 | case IF_STMT: |
10301 | case DO_STMT: | |
10302 | case FOR_STMT: | |
10303 | case WHILE_STMT: | |
8bcc90b0 | 10304 | case DECL_EXPR: |
66e61a34 JM |
10305 | if (flags & tf_error) |
10306 | error ("expression %qE is not a constant-expression", t); | |
10307 | return false; | |
10308 | ||
10309 | case TYPEID_EXPR: | |
10310 | /* -- a typeid expression whose operand is of polymorphic | |
10311 | class type; */ | |
10312 | { | |
10313 | tree e = TREE_OPERAND (t, 0); | |
d6ed1c89 JM |
10314 | if (!TYPE_P (e) && !type_dependent_expression_p (e) |
10315 | && TYPE_POLYMORPHIC_P (TREE_TYPE (e))) | |
66e61a34 JM |
10316 | { |
10317 | if (flags & tf_error) | |
10318 | error ("typeid-expression is not a constant expression " | |
10319 | "because %qE is of polymorphic type", e); | |
10320 | return false; | |
10321 | } | |
10322 | return true; | |
10323 | } | |
10324 | ||
10325 | case MINUS_EXPR: | |
10326 | /* -- a subtraction where both operands are pointers. */ | |
10327 | if (TYPE_PTR_P (TREE_OPERAND (t, 0)) | |
10328 | && TYPE_PTR_P (TREE_OPERAND (t, 1))) | |
10329 | { | |
10330 | if (flags & tf_error) | |
10331 | error ("difference of two pointer expressions is not " | |
10332 | "a constant expression"); | |
10333 | return false; | |
10334 | } | |
d6ed1c89 | 10335 | want_rval = true; |
66e61a34 JM |
10336 | goto binary; |
10337 | ||
10338 | case LT_EXPR: | |
10339 | case LE_EXPR: | |
10340 | case GT_EXPR: | |
10341 | case GE_EXPR: | |
10342 | case EQ_EXPR: | |
10343 | case NE_EXPR: | |
10344 | /* -- a relational or equality operator where at least | |
10345 | one of the operands is a pointer. */ | |
10346 | if (TYPE_PTR_P (TREE_OPERAND (t, 0)) | |
10347 | || TYPE_PTR_P (TREE_OPERAND (t, 1))) | |
10348 | { | |
10349 | if (flags & tf_error) | |
10350 | error ("pointer comparison expression is not a " | |
10351 | "constant expression"); | |
10352 | return false; | |
10353 | } | |
d6ed1c89 | 10354 | want_rval = true; |
66e61a34 JM |
10355 | goto binary; |
10356 | ||
535fb6eb JM |
10357 | case BIT_NOT_EXPR: |
10358 | /* A destructor. */ | |
10359 | if (TYPE_P (TREE_OPERAND (t, 0))) | |
10360 | return true; | |
10361 | /* else fall through. */ | |
10362 | ||
66e61a34 JM |
10363 | case REALPART_EXPR: |
10364 | case IMAGPART_EXPR: | |
10365 | case CONJ_EXPR: | |
10366 | case SAVE_EXPR: | |
10367 | case FIX_TRUNC_EXPR: | |
10368 | case FLOAT_EXPR: | |
10369 | case NEGATE_EXPR: | |
10370 | case ABS_EXPR: | |
66e61a34 | 10371 | case TRUTH_NOT_EXPR: |
66e61a34 | 10372 | case FIXED_CONVERT_EXPR: |
d6ed1c89 JM |
10373 | case UNARY_PLUS_EXPR: |
10374 | return potential_constant_expression_1 (TREE_OPERAND (t, 0), rval, | |
10375 | flags); | |
10376 | ||
10377 | case CAST_EXPR: | |
10378 | case CONST_CAST_EXPR: | |
10379 | case STATIC_CAST_EXPR: | |
10380 | case REINTERPRET_CAST_EXPR: | |
a4474a38 | 10381 | case IMPLICIT_CONV_EXPR: |
604b2bfc | 10382 | if (cxx_dialect < cxx11 |
70e9ab23 JM |
10383 | && !dependent_type_p (TREE_TYPE (t)) |
10384 | && !INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (t))) | |
10385 | /* In C++98, a conversion to non-integral type can't be part of a | |
10386 | constant expression. */ | |
10387 | { | |
10388 | if (flags & tf_error) | |
10389 | error ("cast to non-integral type %qT in a constant expression", | |
10390 | TREE_TYPE (t)); | |
10391 | return false; | |
10392 | } | |
10393 | ||
d6ed1c89 JM |
10394 | return (potential_constant_expression_1 |
10395 | (TREE_OPERAND (t, 0), | |
10396 | TREE_CODE (TREE_TYPE (t)) != REFERENCE_TYPE, flags)); | |
10397 | ||
10398 | case PAREN_EXPR: | |
10399 | case NON_DEPENDENT_EXPR: | |
66e61a34 JM |
10400 | /* For convenience. */ |
10401 | case RETURN_EXPR: | |
d6ed1c89 JM |
10402 | return potential_constant_expression_1 (TREE_OPERAND (t, 0), |
10403 | want_rval, flags); | |
10404 | ||
10405 | case SCOPE_REF: | |
10406 | return potential_constant_expression_1 (TREE_OPERAND (t, 1), | |
10407 | want_rval, flags); | |
66e61a34 | 10408 | |
66e61a34 | 10409 | case TARGET_EXPR: |
8c2f5419 | 10410 | if (!literal_type_p (TREE_TYPE (t))) |
07a9e891 JM |
10411 | { |
10412 | if (flags & tf_error) | |
f732fa7b JM |
10413 | { |
10414 | error ("temporary of non-literal type %qT in a " | |
10415 | "constant expression", TREE_TYPE (t)); | |
10416 | explain_non_literal_class (TREE_TYPE (t)); | |
10417 | } | |
07a9e891 JM |
10418 | return false; |
10419 | } | |
10420 | case INIT_EXPR: | |
d6ed1c89 JM |
10421 | return potential_constant_expression_1 (TREE_OPERAND (t, 1), |
10422 | rval, flags); | |
66e61a34 JM |
10423 | |
10424 | case CONSTRUCTOR: | |
10425 | { | |
9771b263 | 10426 | vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (t); |
66e61a34 | 10427 | constructor_elt *ce; |
9771b263 | 10428 | for (i = 0; vec_safe_iterate (v, i, &ce); ++i) |
d6ed1c89 | 10429 | if (!potential_constant_expression_1 (ce->value, want_rval, flags)) |
66e61a34 JM |
10430 | return false; |
10431 | return true; | |
10432 | } | |
10433 | ||
10434 | case TREE_LIST: | |
10435 | { | |
10436 | gcc_assert (TREE_PURPOSE (t) == NULL_TREE | |
10437 | || DECL_P (TREE_PURPOSE (t))); | |
d6ed1c89 JM |
10438 | if (!potential_constant_expression_1 (TREE_VALUE (t), want_rval, |
10439 | flags)) | |
66e61a34 JM |
10440 | return false; |
10441 | if (TREE_CHAIN (t) == NULL_TREE) | |
10442 | return true; | |
d6ed1c89 JM |
10443 | return potential_constant_expression_1 (TREE_CHAIN (t), want_rval, |
10444 | flags); | |
66e61a34 JM |
10445 | } |
10446 | ||
10447 | case TRUNC_DIV_EXPR: | |
10448 | case CEIL_DIV_EXPR: | |
10449 | case FLOOR_DIV_EXPR: | |
10450 | case ROUND_DIV_EXPR: | |
10451 | case TRUNC_MOD_EXPR: | |
10452 | case CEIL_MOD_EXPR: | |
10453 | case ROUND_MOD_EXPR: | |
d6ed1c89 JM |
10454 | { |
10455 | tree denom = TREE_OPERAND (t, 1); | |
728761be JM |
10456 | if (!potential_constant_expression_1 (denom, rval, flags)) |
10457 | return false; | |
10458 | /* We can't call cxx_eval_outermost_constant_expr on an expression | |
d6ed1c89 JM |
10459 | that hasn't been through fold_non_dependent_expr yet. */ |
10460 | if (!processing_template_decl) | |
728761be | 10461 | denom = cxx_eval_outermost_constant_expr (denom, true); |
d6ed1c89 JM |
10462 | if (integer_zerop (denom)) |
10463 | { | |
10464 | if (flags & tf_error) | |
10465 | error ("division by zero is not a constant-expression"); | |
10466 | return false; | |
10467 | } | |
10468 | else | |
10469 | { | |
10470 | want_rval = true; | |
728761be JM |
10471 | return potential_constant_expression_1 (TREE_OPERAND (t, 0), |
10472 | want_rval, flags); | |
d6ed1c89 JM |
10473 | } |
10474 | } | |
66e61a34 JM |
10475 | |
10476 | case COMPOUND_EXPR: | |
10477 | { | |
10478 | /* check_return_expr sometimes wraps a TARGET_EXPR in a | |
10479 | COMPOUND_EXPR; don't get confused. Also handle EMPTY_CLASS_EXPR | |
10480 | introduced by build_call_a. */ | |
10481 | tree op0 = TREE_OPERAND (t, 0); | |
10482 | tree op1 = TREE_OPERAND (t, 1); | |
10483 | STRIP_NOPS (op1); | |
10484 | if ((TREE_CODE (op0) == TARGET_EXPR && op1 == TARGET_EXPR_SLOT (op0)) | |
10485 | || TREE_CODE (op1) == EMPTY_CLASS_EXPR) | |
d6ed1c89 | 10486 | return potential_constant_expression_1 (op0, want_rval, flags); |
66e61a34 JM |
10487 | else |
10488 | goto binary; | |
10489 | } | |
10490 | ||
10491 | /* If the first operand is the non-short-circuit constant, look at | |
10492 | the second operand; otherwise we only care about the first one for | |
10493 | potentiality. */ | |
10494 | case TRUTH_AND_EXPR: | |
10495 | case TRUTH_ANDIF_EXPR: | |
10496 | tmp = boolean_true_node; | |
10497 | goto truth; | |
10498 | case TRUTH_OR_EXPR: | |
10499 | case TRUTH_ORIF_EXPR: | |
10500 | tmp = boolean_false_node; | |
10501 | truth: | |
9155a6dd JM |
10502 | { |
10503 | tree op = TREE_OPERAND (t, 0); | |
10504 | if (!potential_constant_expression_1 (op, rval, flags)) | |
10505 | return false; | |
10506 | if (!processing_template_decl) | |
728761be | 10507 | op = cxx_eval_outermost_constant_expr (op, true); |
9155a6dd JM |
10508 | if (tree_int_cst_equal (op, tmp)) |
10509 | return potential_constant_expression_1 (TREE_OPERAND (t, 1), rval, flags); | |
10510 | else | |
10511 | return true; | |
10512 | } | |
66e61a34 | 10513 | |
66e61a34 JM |
10514 | case PLUS_EXPR: |
10515 | case MULT_EXPR: | |
10516 | case POINTER_PLUS_EXPR: | |
10517 | case RDIV_EXPR: | |
10518 | case EXACT_DIV_EXPR: | |
10519 | case MIN_EXPR: | |
10520 | case MAX_EXPR: | |
10521 | case LSHIFT_EXPR: | |
10522 | case RSHIFT_EXPR: | |
10523 | case LROTATE_EXPR: | |
10524 | case RROTATE_EXPR: | |
10525 | case BIT_IOR_EXPR: | |
10526 | case BIT_XOR_EXPR: | |
10527 | case BIT_AND_EXPR: | |
81cce6f6 | 10528 | case TRUTH_XOR_EXPR: |
e0f89433 JM |
10529 | case UNORDERED_EXPR: |
10530 | case ORDERED_EXPR: | |
66e61a34 JM |
10531 | case UNLT_EXPR: |
10532 | case UNLE_EXPR: | |
10533 | case UNGT_EXPR: | |
10534 | case UNGE_EXPR: | |
10535 | case UNEQ_EXPR: | |
5d497b05 | 10536 | case LTGT_EXPR: |
66e61a34 JM |
10537 | case RANGE_EXPR: |
10538 | case COMPLEX_EXPR: | |
d6ed1c89 JM |
10539 | want_rval = true; |
10540 | /* Fall through. */ | |
10541 | case ARRAY_REF: | |
10542 | case ARRAY_RANGE_REF: | |
10543 | case MEMBER_REF: | |
10544 | case DOTSTAR_EXPR: | |
66e61a34 JM |
10545 | binary: |
10546 | for (i = 0; i < 2; ++i) | |
d6ed1c89 JM |
10547 | if (!potential_constant_expression_1 (TREE_OPERAND (t, i), |
10548 | want_rval, flags)) | |
66e61a34 JM |
10549 | return false; |
10550 | return true; | |
10551 | ||
12893402 BI |
10552 | case CILK_SYNC_STMT: |
10553 | case CILK_SPAWN_STMT: | |
1141ed3f BI |
10554 | case ARRAY_NOTATION_REF: |
10555 | return false; | |
10556 | ||
f715f0c1 | 10557 | case FMA_EXPR: |
9e1a8dd1 | 10558 | case VEC_PERM_EXPR: |
f715f0c1 PC |
10559 | for (i = 0; i < 3; ++i) |
10560 | if (!potential_constant_expression_1 (TREE_OPERAND (t, i), | |
10561 | true, flags)) | |
10562 | return false; | |
10563 | return true; | |
10564 | ||
66e61a34 JM |
10565 | case COND_EXPR: |
10566 | case VEC_COND_EXPR: | |
10567 | /* If the condition is a known constant, we know which of the legs we | |
10568 | care about; otherwise we only require that the condition and | |
10569 | either of the legs be potentially constant. */ | |
10570 | tmp = TREE_OPERAND (t, 0); | |
d6ed1c89 | 10571 | if (!potential_constant_expression_1 (tmp, rval, flags)) |
66e61a34 | 10572 | return false; |
9155a6dd | 10573 | if (!processing_template_decl) |
728761be | 10574 | tmp = cxx_eval_outermost_constant_expr (tmp, true); |
9155a6dd | 10575 | if (integer_zerop (tmp)) |
d6ed1c89 JM |
10576 | return potential_constant_expression_1 (TREE_OPERAND (t, 2), |
10577 | want_rval, flags); | |
9e33e321 JM |
10578 | else if (TREE_CODE (tmp) == INTEGER_CST) |
10579 | return potential_constant_expression_1 (TREE_OPERAND (t, 1), | |
10580 | want_rval, flags); | |
66e61a34 | 10581 | for (i = 1; i < 3; ++i) |
d6ed1c89 JM |
10582 | if (potential_constant_expression_1 (TREE_OPERAND (t, i), |
10583 | want_rval, tf_none)) | |
66e61a34 JM |
10584 | return true; |
10585 | if (flags & tf_error) | |
10586 | error ("expression %qE is not a constant-expression", t); | |
10587 | return false; | |
10588 | ||
10589 | case VEC_INIT_EXPR: | |
d6ed1c89 JM |
10590 | if (VEC_INIT_EXPR_IS_CONSTEXPR (t)) |
10591 | return true; | |
10592 | if (flags & tf_error) | |
262a7d6b JM |
10593 | { |
10594 | error ("non-constant array initialization"); | |
10595 | diagnose_non_constexpr_vec_init (t); | |
10596 | } | |
d6ed1c89 | 10597 | return false; |
66e61a34 JM |
10598 | |
10599 | default: | |
0d23cf7a JJ |
10600 | if (objc_is_property_ref (t)) |
10601 | return false; | |
10602 | ||
5806f481 | 10603 | sorry ("unexpected AST of kind %s", get_tree_code_name (TREE_CODE (t))); |
66e61a34 JM |
10604 | gcc_unreachable(); |
10605 | return false; | |
10606 | } | |
10607 | } | |
10608 | ||
d6ed1c89 JM |
10609 | /* The main entry point to the above. */ |
10610 | ||
10611 | bool | |
10612 | potential_constant_expression (tree t) | |
10613 | { | |
10614 | return potential_constant_expression_1 (t, false, tf_none); | |
10615 | } | |
10616 | ||
4be5e5b1 JM |
10617 | /* As above, but require a constant rvalue. */ |
10618 | ||
10619 | bool | |
10620 | potential_rvalue_constant_expression (tree t) | |
10621 | { | |
10622 | return potential_constant_expression_1 (t, true, tf_none); | |
10623 | } | |
10624 | ||
d6ed1c89 JM |
10625 | /* Like above, but complain about non-constant expressions. */ |
10626 | ||
10627 | bool | |
10628 | require_potential_constant_expression (tree t) | |
10629 | { | |
10630 | return potential_constant_expression_1 (t, false, tf_warning_or_error); | |
10631 | } | |
4be5e5b1 JM |
10632 | |
10633 | /* Cross product of the above. */ | |
10634 | ||
10635 | bool | |
10636 | require_potential_rvalue_constant_expression (tree t) | |
10637 | { | |
10638 | return potential_constant_expression_1 (t, true, tf_warning_or_error); | |
10639 | } | |
66e61a34 | 10640 | \f |
852497a3 | 10641 | /* Insert the deduced return type for an auto function. */ |
d5f4eddd JM |
10642 | |
10643 | void | |
852497a3 | 10644 | apply_deduced_return_type (tree fco, tree return_type) |
d5f4eddd | 10645 | { |
d5f4eddd JM |
10646 | tree result; |
10647 | ||
d5f4eddd JM |
10648 | if (return_type == error_mark_node) |
10649 | return; | |
10650 | ||
852497a3 JM |
10651 | if (LAMBDA_FUNCTION_P (fco)) |
10652 | { | |
10653 | tree lambda = CLASSTYPE_LAMBDA_EXPR (current_class_type); | |
10654 | LAMBDA_EXPR_RETURN_TYPE (lambda) = return_type; | |
10655 | } | |
10656 | ||
10657 | if (DECL_CONV_FN_P (fco)) | |
10658 | DECL_NAME (fco) = mangle_conv_op_name_for_type (return_type); | |
10659 | ||
643d4cd6 | 10660 | TREE_TYPE (fco) = change_return_type (return_type, TREE_TYPE (fco)); |
d5f4eddd JM |
10661 | |
10662 | result = DECL_RESULT (fco); | |
10663 | if (result == NULL_TREE) | |
10664 | return; | |
852497a3 JM |
10665 | if (TREE_TYPE (result) == return_type) |
10666 | return; | |
d5f4eddd JM |
10667 | |
10668 | /* We already have a DECL_RESULT from start_preparsed_function. | |
10669 | Now we need to redo the work it and allocate_struct_function | |
10670 | did to reflect the new type. */ | |
9b8662c2 | 10671 | gcc_assert (current_function_decl == fco); |
d5f4eddd JM |
10672 | result = build_decl (input_location, RESULT_DECL, NULL_TREE, |
10673 | TYPE_MAIN_VARIANT (return_type)); | |
10674 | DECL_ARTIFICIAL (result) = 1; | |
10675 | DECL_IGNORED_P (result) = 1; | |
10676 | cp_apply_type_quals_to_decl (cp_type_quals (return_type), | |
10677 | result); | |
10678 | ||
10679 | DECL_RESULT (fco) = result; | |
10680 | ||
852497a3 | 10681 | if (!processing_template_decl) |
d5f4eddd | 10682 | { |
3734964f DT |
10683 | if (!VOID_TYPE_P (TREE_TYPE (result))) |
10684 | complete_type_or_else (TREE_TYPE (result), NULL_TREE); | |
852497a3 | 10685 | bool aggr = aggregate_value_p (result, fco); |
d5f4eddd | 10686 | #ifdef PCC_STATIC_STRUCT_RETURN |
852497a3 | 10687 | cfun->returns_pcc_struct = aggr; |
d5f4eddd | 10688 | #endif |
852497a3 | 10689 | cfun->returns_struct = aggr; |
d5f4eddd JM |
10690 | } |
10691 | ||
10692 | } | |
10693 | ||
10694 | /* DECL is a local variable or parameter from the surrounding scope of a | |
10695 | lambda-expression. Returns the decltype for a use of the capture field | |
10696 | for DECL even if it hasn't been captured yet. */ | |
10697 | ||
10698 | static tree | |
10699 | capture_decltype (tree decl) | |
10700 | { | |
10701 | tree lam = CLASSTYPE_LAMBDA_EXPR (DECL_CONTEXT (current_function_decl)); | |
10702 | /* FIXME do lookup instead of list walk? */ | |
10703 | tree cap = value_member (decl, LAMBDA_EXPR_CAPTURE_LIST (lam)); | |
10704 | tree type; | |
10705 | ||
10706 | if (cap) | |
10707 | type = TREE_TYPE (TREE_PURPOSE (cap)); | |
10708 | else | |
10709 | switch (LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lam)) | |
10710 | { | |
10711 | case CPLD_NONE: | |
10712 | error ("%qD is not captured", decl); | |
10713 | return error_mark_node; | |
10714 | ||
10715 | case CPLD_COPY: | |
10716 | type = TREE_TYPE (decl); | |
10717 | if (TREE_CODE (type) == REFERENCE_TYPE | |
10718 | && TREE_CODE (TREE_TYPE (type)) != FUNCTION_TYPE) | |
10719 | type = TREE_TYPE (type); | |
10720 | break; | |
10721 | ||
10722 | case CPLD_REFERENCE: | |
10723 | type = TREE_TYPE (decl); | |
10724 | if (TREE_CODE (type) != REFERENCE_TYPE) | |
10725 | type = build_reference_type (TREE_TYPE (decl)); | |
10726 | break; | |
10727 | ||
10728 | default: | |
10729 | gcc_unreachable (); | |
10730 | } | |
10731 | ||
10732 | if (TREE_CODE (type) != REFERENCE_TYPE) | |
10733 | { | |
10734 | if (!LAMBDA_EXPR_MUTABLE_P (lam)) | |
a3360e77 | 10735 | type = cp_build_qualified_type (type, (cp_type_quals (type) |
d5f4eddd JM |
10736 | |TYPE_QUAL_CONST)); |
10737 | type = build_reference_type (type); | |
10738 | } | |
10739 | return type; | |
10740 | } | |
10741 | ||
cf22909c | 10742 | #include "gt-cp-semantics.h" |