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8d08fdba | 1 | /* Language-dependent node constructors for parse phase of GNU compiler. |
06ceef4e | 2 | Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
6615c446 | 3 | 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
8d08fdba MS |
4 | Hacked by Michael Tiemann (tiemann@cygnus.com) |
5 | ||
f5adbb8d | 6 | This file is part of GCC. |
8d08fdba | 7 | |
f5adbb8d | 8 | GCC is free software; you can redistribute it and/or modify |
8d08fdba MS |
9 | it under the terms of the GNU General Public License as published by |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
f5adbb8d | 13 | GCC is distributed in the hope that it will be useful, |
8d08fdba MS |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
f5adbb8d | 19 | along with GCC; see the file COPYING. If not, write to |
e9fa0c7c RK |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, |
21 | Boston, MA 02111-1307, USA. */ | |
8d08fdba MS |
22 | |
23 | #include "config.h" | |
8d052bc7 | 24 | #include "system.h" |
4977bab6 ZW |
25 | #include "coretypes.h" |
26 | #include "tm.h" | |
8d08fdba MS |
27 | #include "tree.h" |
28 | #include "cp-tree.h" | |
29 | #include "flags.h" | |
11ad4784 | 30 | #include "real.h" |
28cbf42c | 31 | #include "rtl.h" |
12027a89 | 32 | #include "toplev.h" |
46e8c075 MM |
33 | #include "insn-config.h" |
34 | #include "integrate.h" | |
25af8512 | 35 | #include "tree-inline.h" |
8a3c9180 | 36 | #include "target.h" |
12027a89 | 37 | |
b57b79f7 NN |
38 | static tree bot_manip (tree *, int *, void *); |
39 | static tree bot_replace (tree *, int *, void *); | |
40 | static tree build_cplus_array_type_1 (tree, tree); | |
41 | static int list_hash_eq (const void *, const void *); | |
42 | static hashval_t list_hash_pieces (tree, tree, tree); | |
43 | static hashval_t list_hash (const void *); | |
d18a8251 | 44 | static cp_lvalue_kind lvalue_p_1 (tree, int); |
b57b79f7 NN |
45 | static tree build_target_expr (tree, tree); |
46 | static tree count_trees_r (tree *, int *, void *); | |
47 | static tree verify_stmt_tree_r (tree *, int *, void *); | |
48 | static tree find_tree_r (tree *, int *, void *); | |
a6f86b51 | 49 | static tree build_local_temp (tree); |
b57b79f7 NN |
50 | |
51 | static tree handle_java_interface_attribute (tree *, tree, tree, int, bool *); | |
52 | static tree handle_com_interface_attribute (tree *, tree, tree, int, bool *); | |
53 | static tree handle_init_priority_attribute (tree *, tree, tree, int, bool *); | |
91d231cb | 54 | |
27b8d0cd MM |
55 | /* If REF is an lvalue, returns the kind of lvalue that REF is. |
56 | Otherwise, returns clk_none. If TREAT_CLASS_RVALUES_AS_LVALUES is | |
838dfd8a | 57 | nonzero, rvalues of class type are considered lvalues. */ |
8d08fdba | 58 | |
27b8d0cd | 59 | static cp_lvalue_kind |
9f63daea | 60 | lvalue_p_1 (tree ref, |
d18a8251 | 61 | int treat_class_rvalues_as_lvalues) |
8ccc31eb | 62 | { |
27b8d0cd MM |
63 | cp_lvalue_kind op1_lvalue_kind = clk_none; |
64 | cp_lvalue_kind op2_lvalue_kind = clk_none; | |
65 | ||
8ccc31eb | 66 | if (TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE) |
27b8d0cd | 67 | return clk_ordinary; |
8ccc31eb | 68 | |
394fd776 | 69 | if (ref == current_class_ptr) |
27b8d0cd | 70 | return clk_none; |
8ccc31eb MS |
71 | |
72 | switch (TREE_CODE (ref)) | |
73 | { | |
74 | /* preincrements and predecrements are valid lvals, provided | |
e92cc029 | 75 | what they refer to are valid lvals. */ |
8ccc31eb MS |
76 | case PREINCREMENT_EXPR: |
77 | case PREDECREMENT_EXPR: | |
8ccc31eb | 78 | case SAVE_EXPR: |
c7ae64f2 JM |
79 | case TRY_CATCH_EXPR: |
80 | case WITH_CLEANUP_EXPR: | |
69851283 MM |
81 | case REALPART_EXPR: |
82 | case IMAGPART_EXPR: | |
83 | return lvalue_p_1 (TREE_OPERAND (ref, 0), | |
d18a8251 | 84 | treat_class_rvalues_as_lvalues); |
8ccc31eb | 85 | |
27b8d0cd MM |
86 | case COMPONENT_REF: |
87 | op1_lvalue_kind = lvalue_p_1 (TREE_OPERAND (ref, 0), | |
d18a8251 | 88 | treat_class_rvalues_as_lvalues); |
c8b2e872 MM |
89 | /* In an expression of the form "X.Y", the packed-ness of the |
90 | expression does not depend on "X". */ | |
91 | op1_lvalue_kind &= ~clk_packed; | |
92 | /* Look at the member designator. */ | |
9f63daea EC |
93 | if (!op1_lvalue_kind |
94 | /* The "field" can be a FUNCTION_DECL or an OVERLOAD in some | |
e0d1297c NS |
95 | situations. */ |
96 | || TREE_CODE (TREE_OPERAND (ref, 1)) != FIELD_DECL) | |
97 | ; | |
98 | else if (DECL_C_BIT_FIELD (TREE_OPERAND (ref, 1))) | |
27b8d0cd MM |
99 | { |
100 | /* Clear the ordinary bit. If this object was a class | |
101 | rvalue we want to preserve that information. */ | |
102 | op1_lvalue_kind &= ~clk_ordinary; | |
cd0be382 | 103 | /* The lvalue is for a bitfield. */ |
27b8d0cd MM |
104 | op1_lvalue_kind |= clk_bitfield; |
105 | } | |
e0d1297c NS |
106 | else if (DECL_PACKED (TREE_OPERAND (ref, 1))) |
107 | op1_lvalue_kind |= clk_packed; | |
9f63daea | 108 | |
27b8d0cd MM |
109 | return op1_lvalue_kind; |
110 | ||
8ccc31eb | 111 | case STRING_CST: |
27b8d0cd | 112 | return clk_ordinary; |
8ccc31eb MS |
113 | |
114 | case VAR_DECL: | |
115 | if (TREE_READONLY (ref) && ! TREE_STATIC (ref) | |
116 | && DECL_LANG_SPECIFIC (ref) | |
117 | && DECL_IN_AGGR_P (ref)) | |
27b8d0cd | 118 | return clk_none; |
8ccc31eb MS |
119 | case INDIRECT_REF: |
120 | case ARRAY_REF: | |
121 | case PARM_DECL: | |
122 | case RESULT_DECL: | |
59e76fc6 | 123 | if (TREE_CODE (TREE_TYPE (ref)) != METHOD_TYPE) |
27b8d0cd | 124 | return clk_ordinary; |
8ccc31eb MS |
125 | break; |
126 | ||
8ccc31eb MS |
127 | /* A currently unresolved scope ref. */ |
128 | case SCOPE_REF: | |
315fb5db | 129 | gcc_unreachable (); |
27b8d0cd MM |
130 | case MAX_EXPR: |
131 | case MIN_EXPR: | |
132 | op1_lvalue_kind = lvalue_p_1 (TREE_OPERAND (ref, 0), | |
d18a8251 | 133 | treat_class_rvalues_as_lvalues); |
27b8d0cd | 134 | op2_lvalue_kind = lvalue_p_1 (TREE_OPERAND (ref, 1), |
d18a8251 | 135 | treat_class_rvalues_as_lvalues); |
8ccc31eb MS |
136 | break; |
137 | ||
138 | case COND_EXPR: | |
27b8d0cd | 139 | op1_lvalue_kind = lvalue_p_1 (TREE_OPERAND (ref, 1), |
d18a8251 | 140 | treat_class_rvalues_as_lvalues); |
27b8d0cd | 141 | op2_lvalue_kind = lvalue_p_1 (TREE_OPERAND (ref, 2), |
d18a8251 | 142 | treat_class_rvalues_as_lvalues); |
27b8d0cd | 143 | break; |
8ccc31eb MS |
144 | |
145 | case MODIFY_EXPR: | |
27b8d0cd | 146 | return clk_ordinary; |
8ccc31eb MS |
147 | |
148 | case COMPOUND_EXPR: | |
69851283 | 149 | return lvalue_p_1 (TREE_OPERAND (ref, 1), |
d18a8251 | 150 | treat_class_rvalues_as_lvalues); |
69851283 MM |
151 | |
152 | case TARGET_EXPR: | |
27b8d0cd | 153 | return treat_class_rvalues_as_lvalues ? clk_class : clk_none; |
69851283 MM |
154 | |
155 | case CALL_EXPR: | |
356955cf | 156 | case VA_ARG_EXPR: |
4e8dca1c JM |
157 | /* Any class-valued call would be wrapped in a TARGET_EXPR. */ |
158 | return clk_none; | |
69851283 MM |
159 | |
160 | case FUNCTION_DECL: | |
161 | /* All functions (except non-static-member functions) are | |
162 | lvalues. */ | |
9f63daea | 163 | return (DECL_NONSTATIC_MEMBER_FUNCTION_P (ref) |
27b8d0cd | 164 | ? clk_none : clk_ordinary); |
7f85441b | 165 | |
d17811fd MM |
166 | case NON_DEPENDENT_EXPR: |
167 | /* We must consider NON_DEPENDENT_EXPRs to be lvalues so that | |
168 | things like "&E" where "E" is an expression with a | |
169 | non-dependent type work. It is safe to be lenient because an | |
170 | error will be issued when the template is instantiated if "E" | |
171 | is not an lvalue. */ | |
172 | return clk_ordinary; | |
173 | ||
7f85441b KG |
174 | default: |
175 | break; | |
8ccc31eb MS |
176 | } |
177 | ||
27b8d0cd MM |
178 | /* If one operand is not an lvalue at all, then this expression is |
179 | not an lvalue. */ | |
180 | if (!op1_lvalue_kind || !op2_lvalue_kind) | |
181 | return clk_none; | |
182 | ||
183 | /* Otherwise, it's an lvalue, and it has all the odd properties | |
184 | contributed by either operand. */ | |
185 | op1_lvalue_kind = op1_lvalue_kind | op2_lvalue_kind; | |
186 | /* It's not an ordinary lvalue if it involves either a bit-field or | |
187 | a class rvalue. */ | |
188 | if ((op1_lvalue_kind & ~clk_ordinary) != clk_none) | |
189 | op1_lvalue_kind &= ~clk_ordinary; | |
190 | return op1_lvalue_kind; | |
8ccc31eb MS |
191 | } |
192 | ||
aa6e8ed3 MM |
193 | /* Returns the kind of lvalue that REF is, in the sense of |
194 | [basic.lval]. This function should really be named lvalue_p; it | |
195 | computes the C++ definition of lvalue. */ | |
196 | ||
197 | cp_lvalue_kind | |
d18a8251 | 198 | real_lvalue_p (tree ref) |
aa6e8ed3 | 199 | { |
9f63daea | 200 | return lvalue_p_1 (ref, |
d18a8251 | 201 | /*treat_class_rvalues_as_lvalues=*/0); |
aa6e8ed3 MM |
202 | } |
203 | ||
27b8d0cd MM |
204 | /* This differs from real_lvalue_p in that class rvalues are |
205 | considered lvalues. */ | |
69851283 | 206 | |
8d08fdba | 207 | int |
b57b79f7 | 208 | lvalue_p (tree ref) |
8d08fdba | 209 | { |
9f63daea | 210 | return |
d18a8251 | 211 | (lvalue_p_1 (ref, /*class rvalue ok*/ 1) != clk_none); |
6c6e776d MA |
212 | } |
213 | ||
8d08fdba MS |
214 | /* Return nonzero if REF is an lvalue valid for this language; |
215 | otherwise, print an error message and return zero. */ | |
216 | ||
217 | int | |
b57b79f7 | 218 | lvalue_or_else (tree ref, const char* string) |
8d08fdba | 219 | { |
d18a8251 MM |
220 | if (!lvalue_p (ref)) |
221 | { | |
222 | error ("non-lvalue in %s", string); | |
223 | return 0; | |
224 | } | |
225 | return 1; | |
8d08fdba MS |
226 | } |
227 | ||
c506ca22 MM |
228 | /* Build a TARGET_EXPR, initializing the DECL with the VALUE. */ |
229 | ||
230 | static tree | |
b57b79f7 | 231 | build_target_expr (tree decl, tree value) |
c506ca22 MM |
232 | { |
233 | tree t; | |
234 | ||
f293ce4b RS |
235 | t = build4 (TARGET_EXPR, TREE_TYPE (decl), decl, value, |
236 | cxx_maybe_build_cleanup (decl), NULL_TREE); | |
c506ca22 MM |
237 | /* We always set TREE_SIDE_EFFECTS so that expand_expr does not |
238 | ignore the TARGET_EXPR. If there really turn out to be no | |
239 | side-effects, then the optimizer should be able to get rid of | |
240 | whatever code is generated anyhow. */ | |
241 | TREE_SIDE_EFFECTS (t) = 1; | |
242 | ||
243 | return t; | |
244 | } | |
245 | ||
a6f86b51 JM |
246 | /* Return an undeclared local temporary of type TYPE for use in building a |
247 | TARGET_EXPR. */ | |
248 | ||
249 | static tree | |
250 | build_local_temp (tree type) | |
251 | { | |
252 | tree slot = build_decl (VAR_DECL, NULL_TREE, type); | |
253 | DECL_ARTIFICIAL (slot) = 1; | |
254 | DECL_CONTEXT (slot) = current_function_decl; | |
255 | layout_decl (slot, 0); | |
256 | return slot; | |
257 | } | |
258 | ||
8d08fdba MS |
259 | /* INIT is a CALL_EXPR which needs info about its target. |
260 | TYPE is the type that this initialization should appear to have. | |
261 | ||
262 | Build an encapsulation of the initialization to perform | |
263 | and return it so that it can be processed by language-independent | |
2ee887f2 | 264 | and language-specific expression expanders. */ |
e92cc029 | 265 | |
8d08fdba | 266 | tree |
b57b79f7 | 267 | build_cplus_new (tree type, tree init) |
8d08fdba | 268 | { |
e1376b00 | 269 | tree fn; |
e8abc66f MS |
270 | tree slot; |
271 | tree rval; | |
4977bab6 | 272 | int is_ctor; |
e8abc66f | 273 | |
27b8d0cd MM |
274 | /* Make sure that we're not trying to create an instance of an |
275 | abstract class. */ | |
5bb2f1e7 | 276 | abstract_virtuals_error (NULL_TREE, type); |
27b8d0cd | 277 | |
02531345 | 278 | if (TREE_CODE (init) != CALL_EXPR && TREE_CODE (init) != AGGR_INIT_EXPR) |
06126ca2 | 279 | return convert (type, init); |
c11b6f21 | 280 | |
4977bab6 ZW |
281 | fn = TREE_OPERAND (init, 0); |
282 | is_ctor = (TREE_CODE (fn) == ADDR_EXPR | |
283 | && TREE_CODE (TREE_OPERAND (fn, 0)) == FUNCTION_DECL | |
284 | && DECL_CONSTRUCTOR_P (TREE_OPERAND (fn, 0))); | |
285 | ||
a6f86b51 | 286 | slot = build_local_temp (type); |
e1376b00 MM |
287 | |
288 | /* We split the CALL_EXPR into its function and its arguments here. | |
289 | Then, in expand_expr, we put them back together. The reason for | |
290 | this is that this expression might be a default argument | |
291 | expression. In that case, we need a new temporary every time the | |
292 | expression is used. That's what break_out_target_exprs does; it | |
293 | replaces every AGGR_INIT_EXPR with a copy that uses a fresh | |
294 | temporary slot. Then, expand_expr builds up a call-expression | |
295 | using the new slot. */ | |
4977bab6 ZW |
296 | |
297 | /* If we don't need to use a constructor to create an object of this | |
298 | type, don't mess with AGGR_INIT_EXPR. */ | |
299 | if (is_ctor || TREE_ADDRESSABLE (type)) | |
300 | { | |
f293ce4b RS |
301 | rval = build3 (AGGR_INIT_EXPR, void_type_node, fn, |
302 | TREE_OPERAND (init, 1), slot); | |
4977bab6 ZW |
303 | TREE_SIDE_EFFECTS (rval) = 1; |
304 | AGGR_INIT_VIA_CTOR_P (rval) = is_ctor; | |
305 | } | |
306 | else | |
307 | rval = init; | |
308 | ||
9d85d30c | 309 | rval = build_target_expr (slot, rval); |
8d08fdba | 310 | |
8d08fdba MS |
311 | return rval; |
312 | } | |
313 | ||
ab93b543 | 314 | /* Build a TARGET_EXPR using INIT to initialize a new temporary of the |
c506ca22 | 315 | indicated TYPE. */ |
aa36c081 JM |
316 | |
317 | tree | |
b57b79f7 | 318 | build_target_expr_with_type (tree init, tree type) |
aa36c081 JM |
319 | { |
320 | tree slot; | |
aa36c081 | 321 | |
50bc768d | 322 | gcc_assert (!VOID_TYPE_P (type)); |
59445d74 | 323 | |
5062dbd5 JM |
324 | if (TREE_CODE (init) == TARGET_EXPR) |
325 | return init; | |
182609b5 | 326 | else if (CLASS_TYPE_P (type) && !TYPE_HAS_TRIVIAL_INIT_REF (type) |
4b5aa881 | 327 | && TREE_CODE (init) != COND_EXPR |
662eceda MM |
328 | && TREE_CODE (init) != CONSTRUCTOR |
329 | && TREE_CODE (init) != VA_ARG_EXPR) | |
182609b5 JM |
330 | /* We need to build up a copy constructor call. COND_EXPR is a special |
331 | case because we already have copies on the arms and we don't want | |
4b5aa881 | 332 | another one here. A CONSTRUCTOR is aggregate initialization, which |
662eceda MM |
333 | is handled separately. A VA_ARG_EXPR is magic creation of an |
334 | aggregate; there's no additional work to be done. */ | |
182609b5 | 335 | return force_rvalue (init); |
5062dbd5 | 336 | |
a6f86b51 JM |
337 | slot = build_local_temp (type); |
338 | return build_target_expr (slot, init); | |
339 | } | |
aa36c081 | 340 | |
a6f86b51 JM |
341 | /* Like the above function, but without the checking. This function should |
342 | only be used by code which is deliberately trying to subvert the type | |
343 | system, such as call_builtin_trap. */ | |
344 | ||
345 | tree | |
346 | force_target_expr (tree type, tree init) | |
347 | { | |
59445d74 RH |
348 | tree slot; |
349 | ||
50bc768d | 350 | gcc_assert (!VOID_TYPE_P (type)); |
59445d74 RH |
351 | |
352 | slot = build_local_temp (type); | |
a6f86b51 | 353 | return build_target_expr (slot, init); |
aa36c081 JM |
354 | } |
355 | ||
c506ca22 MM |
356 | /* Like build_target_expr_with_type, but use the type of INIT. */ |
357 | ||
358 | tree | |
b57b79f7 | 359 | get_target_expr (tree init) |
c506ca22 MM |
360 | { |
361 | return build_target_expr_with_type (init, TREE_TYPE (init)); | |
362 | } | |
363 | ||
8d08fdba | 364 | \f |
bd6dd845 | 365 | static tree |
b57b79f7 | 366 | build_cplus_array_type_1 (tree elt_type, tree index_type) |
8d08fdba | 367 | { |
8d08fdba MS |
368 | tree t; |
369 | ||
adecb3f4 MM |
370 | if (elt_type == error_mark_node || index_type == error_mark_node) |
371 | return error_mark_node; | |
372 | ||
58496de1 NS |
373 | if (dependent_type_p (elt_type) |
374 | || (index_type | |
375 | && value_dependent_expression_p (TYPE_MAX_VALUE (index_type)))) | |
5566b478 MS |
376 | { |
377 | t = make_node (ARRAY_TYPE); | |
378 | TREE_TYPE (t) = elt_type; | |
379 | TYPE_DOMAIN (t) = index_type; | |
380 | } | |
381 | else | |
80661759 | 382 | t = build_array_type (elt_type, index_type); |
8d08fdba MS |
383 | |
384 | /* Push these needs up so that initialization takes place | |
385 | more easily. */ | |
9f63daea | 386 | TYPE_NEEDS_CONSTRUCTING (t) |
db3626d1 | 387 | = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type)); |
9f63daea | 388 | TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t) |
834c6dff | 389 | = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type)); |
8d08fdba MS |
390 | return t; |
391 | } | |
e349ee73 MS |
392 | |
393 | tree | |
b57b79f7 | 394 | build_cplus_array_type (tree elt_type, tree index_type) |
e349ee73 MS |
395 | { |
396 | tree t; | |
89d684bb | 397 | int type_quals = cp_type_quals (elt_type); |
91063b51 | 398 | |
4b011bbf JM |
399 | if (type_quals != TYPE_UNQUALIFIED) |
400 | elt_type = cp_build_qualified_type (elt_type, TYPE_UNQUALIFIED); | |
e349ee73 MS |
401 | |
402 | t = build_cplus_array_type_1 (elt_type, index_type); | |
403 | ||
4b011bbf JM |
404 | if (type_quals != TYPE_UNQUALIFIED) |
405 | t = cp_build_qualified_type (t, type_quals); | |
e349ee73 MS |
406 | |
407 | return t; | |
408 | } | |
8d08fdba | 409 | \f |
adecb3f4 MM |
410 | /* Make a variant of TYPE, qualified with the TYPE_QUALS. Handles |
411 | arrays correctly. In particular, if TYPE is an array of T's, and | |
c2ea3a40 | 412 | TYPE_QUALS is non-empty, returns an array of qualified T's. |
9f63daea | 413 | |
4f2b0fb2 NS |
414 | FLAGS determines how to deal with illformed qualifications. If |
415 | tf_ignore_bad_quals is set, then bad qualifications are dropped | |
416 | (this is permitted if TYPE was introduced via a typedef or template | |
417 | type parameter). If bad qualifications are dropped and tf_warning | |
418 | is set, then a warning is issued for non-const qualifications. If | |
419 | tf_ignore_bad_quals is not set and tf_error is not set, we | |
420 | return error_mark_node. Otherwise, we issue an error, and ignore | |
421 | the qualifications. | |
422 | ||
423 | Qualification of a reference type is valid when the reference came | |
424 | via a typedef or template type argument. [dcl.ref] No such | |
425 | dispensation is provided for qualifying a function type. [dcl.fct] | |
426 | DR 295 queries this and the proposed resolution brings it into line | |
34cd5ae7 | 427 | with qualifying a reference. We implement the DR. We also behave |
4f2b0fb2 | 428 | in a similar manner for restricting non-pointer types. */ |
9f63daea | 429 | |
f376e137 | 430 | tree |
9f63daea EC |
431 | cp_build_qualified_type_real (tree type, |
432 | int type_quals, | |
b57b79f7 | 433 | tsubst_flags_t complain) |
f376e137 | 434 | { |
2adeacc9 | 435 | tree result; |
4f2b0fb2 | 436 | int bad_quals = TYPE_UNQUALIFIED; |
2adeacc9 | 437 | |
e76a2646 MS |
438 | if (type == error_mark_node) |
439 | return type; | |
e271912d | 440 | |
89d684bb | 441 | if (type_quals == cp_type_quals (type)) |
e271912d JM |
442 | return type; |
443 | ||
4f2b0fb2 | 444 | if (TREE_CODE (type) == ARRAY_TYPE) |
f376e137 | 445 | { |
db3626d1 MM |
446 | /* In C++, the qualification really applies to the array element |
447 | type. Obtain the appropriately qualified element type. */ | |
448 | tree t; | |
9f63daea EC |
449 | tree element_type |
450 | = cp_build_qualified_type_real (TREE_TYPE (type), | |
db3626d1 MM |
451 | type_quals, |
452 | complain); | |
453 | ||
454 | if (element_type == error_mark_node) | |
adecb3f4 | 455 | return error_mark_node; |
f376e137 | 456 | |
29fae15c MM |
457 | /* See if we already have an identically qualified type. */ |
458 | for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) | |
9f63daea | 459 | if (cp_type_quals (t) == type_quals |
29fae15c MM |
460 | && TYPE_NAME (t) == TYPE_NAME (type) |
461 | && TYPE_CONTEXT (t) == TYPE_CONTEXT (type)) | |
462 | break; | |
9f63daea | 463 | |
29fae15c MM |
464 | if (!t) |
465 | { | |
466 | /* Make a new array type, just like the old one, but with the | |
467 | appropriately qualified element type. */ | |
8dd16ecc | 468 | t = build_variant_type_copy (type); |
29fae15c MM |
469 | TREE_TYPE (t) = element_type; |
470 | } | |
f376e137 | 471 | |
db3626d1 | 472 | /* Even if we already had this variant, we update |
834c6dff | 473 | TYPE_NEEDS_CONSTRUCTING and TYPE_HAS_NONTRIVIAL_DESTRUCTOR in case |
9f63daea EC |
474 | they changed since the variant was originally created. |
475 | ||
db3626d1 MM |
476 | This seems hokey; if there is some way to use a previous |
477 | variant *without* coming through here, | |
478 | TYPE_NEEDS_CONSTRUCTING will never be updated. */ | |
9f63daea | 479 | TYPE_NEEDS_CONSTRUCTING (t) |
db3626d1 | 480 | = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (element_type)); |
9f63daea | 481 | TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t) |
834c6dff | 482 | = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (element_type)); |
db3626d1 | 483 | return t; |
f376e137 | 484 | } |
2adeacc9 MM |
485 | else if (TYPE_PTRMEMFUNC_P (type)) |
486 | { | |
487 | /* For a pointer-to-member type, we can't just return a | |
488 | cv-qualified version of the RECORD_TYPE. If we do, we | |
4f2b0fb2 | 489 | haven't changed the field that contains the actual pointer to |
2adeacc9 MM |
490 | a method, and so TYPE_PTRMEMFUNC_FN_TYPE will be wrong. */ |
491 | tree t; | |
492 | ||
493 | t = TYPE_PTRMEMFUNC_FN_TYPE (type); | |
494 | t = cp_build_qualified_type_real (t, type_quals, complain); | |
46cbda4a | 495 | return build_ptrmemfunc_type (t); |
2adeacc9 | 496 | } |
9f63daea | 497 | |
4b011bbf JM |
498 | /* A reference, function or method type shall not be cv qualified. |
499 | [dcl.ref], [dct.fct] */ | |
500 | if (type_quals & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE) | |
501 | && (TREE_CODE (type) == REFERENCE_TYPE | |
502 | || TREE_CODE (type) == FUNCTION_TYPE | |
503 | || TREE_CODE (type) == METHOD_TYPE)) | |
504 | { | |
505 | bad_quals |= type_quals & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE); | |
4b011bbf JM |
506 | type_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE); |
507 | } | |
9f63daea | 508 | |
4b011bbf JM |
509 | /* A restrict-qualified type must be a pointer (or reference) |
510 | to object or incomplete type. */ | |
511 | if ((type_quals & TYPE_QUAL_RESTRICT) | |
512 | && TREE_CODE (type) != TEMPLATE_TYPE_PARM | |
513 | && TREE_CODE (type) != TYPENAME_TYPE | |
514 | && !POINTER_TYPE_P (type)) | |
515 | { | |
516 | bad_quals |= TYPE_QUAL_RESTRICT; | |
517 | type_quals &= ~TYPE_QUAL_RESTRICT; | |
518 | } | |
519 | ||
520 | if (bad_quals == TYPE_UNQUALIFIED) | |
521 | /*OK*/; | |
522 | else if (!(complain & (tf_error | tf_ignore_bad_quals))) | |
523 | return error_mark_node; | |
4b011bbf JM |
524 | else |
525 | { | |
526 | if (complain & tf_ignore_bad_quals) | |
527 | /* We're not going to warn about constifying things that can't | |
528 | be constified. */ | |
529 | bad_quals &= ~TYPE_QUAL_CONST; | |
4b011bbf JM |
530 | if (bad_quals) |
531 | { | |
532 | tree bad_type = build_qualified_type (ptr_type_node, bad_quals); | |
9f63daea | 533 | |
2e9ceb77 | 534 | if (!(complain & tf_ignore_bad_quals)) |
4b011bbf JM |
535 | error ("`%V' qualifiers cannot be applied to `%T'", |
536 | bad_type, type); | |
537 | } | |
538 | } | |
9f63daea | 539 | |
2adeacc9 MM |
540 | /* Retrieve (or create) the appropriately qualified variant. */ |
541 | result = build_qualified_type (type, type_quals); | |
542 | ||
543 | /* If this was a pointer-to-method type, and we just made a copy, | |
3cfab7ec GK |
544 | then we need to unshare the record that holds the cached |
545 | pointer-to-member-function type, because these will be distinct | |
546 | between the unqualified and qualified types. */ | |
9f63daea | 547 | if (result != type |
2adeacc9 MM |
548 | && TREE_CODE (type) == POINTER_TYPE |
549 | && TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE) | |
3cfab7ec | 550 | TYPE_LANG_SPECIFIC (result) = NULL; |
2adeacc9 MM |
551 | |
552 | return result; | |
f376e137 | 553 | } |
53929c47 JM |
554 | |
555 | /* Returns the canonical version of TYPE. In other words, if TYPE is | |
556 | a typedef, returns the underlying type. The cv-qualification of | |
557 | the type returned matches the type input; they will always be | |
558 | compatible types. */ | |
559 | ||
560 | tree | |
b57b79f7 | 561 | canonical_type_variant (tree t) |
53929c47 | 562 | { |
89d684bb | 563 | return cp_build_qualified_type (TYPE_MAIN_VARIANT (t), cp_type_quals (t)); |
53929c47 | 564 | } |
f376e137 | 565 | \f |
48b45647 NS |
566 | /* Makes a copy of BINFO and TYPE, which is to be inherited into a |
567 | graph dominated by T. If BINFO is NULL, TYPE is a dependent base, | |
568 | and we do a shallow copy. If BINFO is non-NULL, we do a deep copy. | |
569 | VIRT indicates whether TYPE is inherited virtually or not. | |
570 | IGO_PREV points at the previous binfo of the inheritance graph | |
571 | order chain. The newly copied binfo's TREE_CHAIN forms this | |
572 | ordering. | |
573 | ||
574 | The CLASSTYPE_VBASECLASSES vector of T is constructed in the | |
575 | correct order. That is in the order the bases themselves should be | |
576 | constructed in. | |
dbbf88d1 NS |
577 | |
578 | The BINFO_INHERITANCE of a virtual base class points to the binfo | |
48b45647 NS |
579 | of the most derived type. ??? We could probably change this so that |
580 | BINFO_INHERITANCE becomes synonymous with BINFO_PRIMARY, and hence | |
581 | remove a field. They currently can only differ for primary virtual | |
582 | virtual bases. */ | |
dbbf88d1 NS |
583 | |
584 | tree | |
48b45647 | 585 | copy_binfo (tree binfo, tree type, tree t, tree *igo_prev, int virt) |
9a71c18b | 586 | { |
48b45647 | 587 | tree new_binfo; |
9a71c18b | 588 | |
48b45647 NS |
589 | if (virt) |
590 | { | |
591 | /* See if we've already made this virtual base. */ | |
592 | new_binfo = binfo_for_vbase (type, t); | |
593 | if (new_binfo) | |
594 | return new_binfo; | |
595 | } | |
9f63daea | 596 | |
fa743e8c | 597 | new_binfo = make_tree_binfo (binfo ? BINFO_N_BASE_BINFOS (binfo) : 0); |
48b45647 | 598 | BINFO_TYPE (new_binfo) = type; |
9a71c18b | 599 | |
48b45647 NS |
600 | /* Chain it into the inheritance graph. */ |
601 | TREE_CHAIN (*igo_prev) = new_binfo; | |
602 | *igo_prev = new_binfo; | |
9f63daea | 603 | |
48b45647 | 604 | if (binfo) |
dfbcd65a | 605 | { |
fa743e8c NS |
606 | int ix; |
607 | tree base_binfo; | |
9f63daea | 608 | |
50bc768d NS |
609 | gcc_assert (!BINFO_DEPENDENT_BASE_P (binfo)); |
610 | gcc_assert (type == BINFO_TYPE (binfo)); | |
9f63daea | 611 | |
48b45647 NS |
612 | BINFO_OFFSET (new_binfo) = BINFO_OFFSET (binfo); |
613 | BINFO_VIRTUALS (new_binfo) = BINFO_VIRTUALS (binfo); | |
9f63daea | 614 | |
fa743e8c NS |
615 | /* We do not need to copy the accesses, as they are read only. */ |
616 | BINFO_BASE_ACCESSES (new_binfo) = BINFO_BASE_ACCESSES (binfo); | |
9f63daea | 617 | |
48b45647 | 618 | /* Recursively copy base binfos of BINFO. */ |
fa743e8c | 619 | for (ix = 0; BINFO_BASE_ITERATE (binfo, ix, base_binfo); ix++) |
dbbf88d1 | 620 | { |
48b45647 | 621 | tree new_base_binfo; |
9f63daea | 622 | |
50bc768d | 623 | gcc_assert (!BINFO_DEPENDENT_BASE_P (base_binfo)); |
48b45647 NS |
624 | new_base_binfo = copy_binfo (base_binfo, BINFO_TYPE (base_binfo), |
625 | t, igo_prev, | |
626 | BINFO_VIRTUAL_P (base_binfo)); | |
9f63daea | 627 | |
48b45647 NS |
628 | if (!BINFO_INHERITANCE_CHAIN (new_base_binfo)) |
629 | BINFO_INHERITANCE_CHAIN (new_base_binfo) = new_binfo; | |
fa743e8c | 630 | BINFO_BASE_APPEND (new_binfo, new_base_binfo); |
dbbf88d1 | 631 | } |
9a71c18b | 632 | } |
48b45647 NS |
633 | else |
634 | BINFO_DEPENDENT_BASE_P (new_binfo) = 1; | |
9f63daea | 635 | |
48b45647 NS |
636 | if (virt) |
637 | { | |
638 | /* Push it onto the list after any virtual bases it contains | |
639 | will have been pushed. */ | |
640 | VEC_quick_push (tree, CLASSTYPE_VBASECLASSES (t), new_binfo); | |
641 | BINFO_VIRTUAL_P (new_binfo) = 1; | |
642 | BINFO_INHERITANCE_CHAIN (new_binfo) = TYPE_BINFO (t); | |
643 | } | |
9f63daea | 644 | |
48b45647 | 645 | return new_binfo; |
9a71c18b | 646 | } |
8d08fdba MS |
647 | \f |
648 | /* Hashing of lists so that we don't make duplicates. | |
649 | The entry point is `list_hash_canon'. */ | |
650 | ||
8d08fdba MS |
651 | /* Now here is the hash table. When recording a list, it is added |
652 | to the slot whose index is the hash code mod the table size. | |
653 | Note that the hash table is used for several kinds of lists. | |
654 | While all these live in the same table, they are completely independent, | |
655 | and the hash code is computed differently for each of these. */ | |
656 | ||
e2500fed | 657 | static GTY ((param_is (union tree_node))) htab_t list_hash_table; |
9ccb25d5 | 658 | |
9f63daea | 659 | struct list_proxy |
9ccb25d5 MM |
660 | { |
661 | tree purpose; | |
662 | tree value; | |
663 | tree chain; | |
664 | }; | |
665 | ||
666 | /* Compare ENTRY (an entry in the hash table) with DATA (a list_proxy | |
667 | for a node we are thinking about adding). */ | |
668 | ||
669 | static int | |
b57b79f7 | 670 | list_hash_eq (const void* entry, const void* data) |
9ccb25d5 MM |
671 | { |
672 | tree t = (tree) entry; | |
673 | struct list_proxy *proxy = (struct list_proxy *) data; | |
674 | ||
675 | return (TREE_VALUE (t) == proxy->value | |
676 | && TREE_PURPOSE (t) == proxy->purpose | |
677 | && TREE_CHAIN (t) == proxy->chain); | |
678 | } | |
8d08fdba MS |
679 | |
680 | /* Compute a hash code for a list (chain of TREE_LIST nodes | |
681 | with goodies in the TREE_PURPOSE, TREE_VALUE, and bits of the | |
682 | TREE_COMMON slots), by adding the hash codes of the individual entries. */ | |
683 | ||
9ccb25d5 | 684 | static hashval_t |
b57b79f7 | 685 | list_hash_pieces (tree purpose, tree value, tree chain) |
8d08fdba | 686 | { |
9ccb25d5 | 687 | hashval_t hashcode = 0; |
9f63daea | 688 | |
37c46b43 | 689 | if (chain) |
fd917e0d | 690 | hashcode += TREE_HASH (chain); |
9f63daea | 691 | |
37c46b43 | 692 | if (value) |
fd917e0d | 693 | hashcode += TREE_HASH (value); |
8d08fdba MS |
694 | else |
695 | hashcode += 1007; | |
37c46b43 | 696 | if (purpose) |
fd917e0d | 697 | hashcode += TREE_HASH (purpose); |
8d08fdba MS |
698 | else |
699 | hashcode += 1009; | |
700 | return hashcode; | |
701 | } | |
702 | ||
9ccb25d5 | 703 | /* Hash an already existing TREE_LIST. */ |
8d08fdba | 704 | |
9ccb25d5 | 705 | static hashval_t |
b57b79f7 | 706 | list_hash (const void* p) |
8d08fdba | 707 | { |
9ccb25d5 | 708 | tree t = (tree) p; |
9f63daea EC |
709 | return list_hash_pieces (TREE_PURPOSE (t), |
710 | TREE_VALUE (t), | |
9ccb25d5 | 711 | TREE_CHAIN (t)); |
8d08fdba MS |
712 | } |
713 | ||
51632249 JM |
714 | /* Given list components PURPOSE, VALUE, AND CHAIN, return the canonical |
715 | object for an identical list if one already exists. Otherwise, build a | |
716 | new one, and record it as the canonical object. */ | |
8d08fdba | 717 | |
8d08fdba | 718 | tree |
b57b79f7 | 719 | hash_tree_cons (tree purpose, tree value, tree chain) |
8d08fdba | 720 | { |
a703fb38 | 721 | int hashcode = 0; |
fad205ff | 722 | void **slot; |
9ccb25d5 MM |
723 | struct list_proxy proxy; |
724 | ||
725 | /* Hash the list node. */ | |
726 | hashcode = list_hash_pieces (purpose, value, chain); | |
727 | /* Create a proxy for the TREE_LIST we would like to create. We | |
728 | don't actually create it so as to avoid creating garbage. */ | |
729 | proxy.purpose = purpose; | |
730 | proxy.value = value; | |
731 | proxy.chain = chain; | |
732 | /* See if it is already in the table. */ | |
733 | slot = htab_find_slot_with_hash (list_hash_table, &proxy, hashcode, | |
734 | INSERT); | |
735 | /* If not, create a new node. */ | |
736 | if (!*slot) | |
fad205ff | 737 | *slot = tree_cons (purpose, value, chain); |
9ccb25d5 | 738 | return *slot; |
8d08fdba MS |
739 | } |
740 | ||
741 | /* Constructor for hashed lists. */ | |
e92cc029 | 742 | |
8d08fdba | 743 | tree |
b57b79f7 | 744 | hash_tree_chain (tree value, tree chain) |
8d08fdba | 745 | { |
51632249 | 746 | return hash_tree_cons (NULL_TREE, value, chain); |
8d08fdba MS |
747 | } |
748 | ||
749 | /* Similar, but used for concatenating two lists. */ | |
e92cc029 | 750 | |
8d08fdba | 751 | tree |
b57b79f7 | 752 | hash_chainon (tree list1, tree list2) |
8d08fdba MS |
753 | { |
754 | if (list2 == 0) | |
755 | return list1; | |
756 | if (list1 == 0) | |
757 | return list2; | |
758 | if (TREE_CHAIN (list1) == NULL_TREE) | |
759 | return hash_tree_chain (TREE_VALUE (list1), list2); | |
760 | return hash_tree_chain (TREE_VALUE (list1), | |
761 | hash_chainon (TREE_CHAIN (list1), list2)); | |
762 | } | |
8d08fdba | 763 | \f |
8d08fdba | 764 | void |
b57b79f7 | 765 | debug_binfo (tree elem) |
8d08fdba | 766 | { |
fed3cef0 | 767 | HOST_WIDE_INT n; |
8d08fdba MS |
768 | tree virtuals; |
769 | ||
90ff44cf KG |
770 | fprintf (stderr, "type \"%s\", offset = " HOST_WIDE_INT_PRINT_DEC |
771 | "\nvtable type:\n", | |
772 | TYPE_NAME_STRING (BINFO_TYPE (elem)), | |
fed3cef0 | 773 | TREE_INT_CST_LOW (BINFO_OFFSET (elem))); |
8d08fdba MS |
774 | debug_tree (BINFO_TYPE (elem)); |
775 | if (BINFO_VTABLE (elem)) | |
fed3cef0 | 776 | fprintf (stderr, "vtable decl \"%s\"\n", |
c35cce41 | 777 | IDENTIFIER_POINTER (DECL_NAME (get_vtbl_decl_for_binfo (elem)))); |
8d08fdba MS |
778 | else |
779 | fprintf (stderr, "no vtable decl yet\n"); | |
780 | fprintf (stderr, "virtuals:\n"); | |
da3d4dfa | 781 | virtuals = BINFO_VIRTUALS (elem); |
1f84ec23 | 782 | n = 0; |
f30432d7 | 783 | |
8d08fdba MS |
784 | while (virtuals) |
785 | { | |
83f2ccf4 | 786 | tree fndecl = TREE_VALUE (virtuals); |
71e89f27 | 787 | fprintf (stderr, "%s [%ld =? %ld]\n", |
8d08fdba | 788 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)), |
71e89f27 | 789 | (long) n, (long) TREE_INT_CST_LOW (DECL_VINDEX (fndecl))); |
f30432d7 | 790 | ++n; |
8d08fdba | 791 | virtuals = TREE_CHAIN (virtuals); |
8d08fdba MS |
792 | } |
793 | } | |
794 | ||
8d08fdba | 795 | int |
b57b79f7 | 796 | count_functions (tree t) |
8d08fdba | 797 | { |
2c73f9f5 | 798 | int i; |
315fb5db | 799 | |
8d08fdba MS |
800 | if (TREE_CODE (t) == FUNCTION_DECL) |
801 | return 1; | |
315fb5db NS |
802 | gcc_assert (TREE_CODE (t) == OVERLOAD); |
803 | ||
804 | for (i = 0; t; t = OVL_CHAIN (t)) | |
805 | i++; | |
806 | return i; | |
8d08fdba MS |
807 | } |
808 | ||
8d08fdba | 809 | int |
b57b79f7 | 810 | is_overloaded_fn (tree x) |
8d08fdba | 811 | { |
4bb0968f | 812 | /* A baselink is also considered an overloaded function. */ |
05e0b2f4 JM |
813 | if (TREE_CODE (x) == OFFSET_REF) |
814 | x = TREE_OPERAND (x, 1); | |
4bb0968f | 815 | if (BASELINK_P (x)) |
da15dae6 | 816 | x = BASELINK_FUNCTIONS (x); |
06ab59df MM |
817 | return (TREE_CODE (x) == FUNCTION_DECL |
818 | || TREE_CODE (x) == TEMPLATE_ID_EXPR | |
819 | || DECL_FUNCTION_TEMPLATE_P (x) | |
2c73f9f5 | 820 | || TREE_CODE (x) == OVERLOAD); |
8d08fdba MS |
821 | } |
822 | ||
8926095f | 823 | int |
b57b79f7 | 824 | really_overloaded_fn (tree x) |
9f63daea | 825 | { |
4bb0968f | 826 | /* A baselink is also considered an overloaded function. */ |
05e0b2f4 JM |
827 | if (TREE_CODE (x) == OFFSET_REF) |
828 | x = TREE_OPERAND (x, 1); | |
4bb0968f | 829 | if (BASELINK_P (x)) |
da15dae6 | 830 | x = BASELINK_FUNCTIONS (x); |
9f63daea | 831 | |
5a9a1961 NS |
832 | return ((TREE_CODE (x) == OVERLOAD && OVL_CHAIN (x)) |
833 | || DECL_FUNCTION_TEMPLATE_P (OVL_CURRENT (x)) | |
834 | || TREE_CODE (x) == TEMPLATE_ID_EXPR); | |
8926095f MS |
835 | } |
836 | ||
8d08fdba | 837 | tree |
b57b79f7 | 838 | get_first_fn (tree from) |
8d08fdba | 839 | { |
50bc768d | 840 | gcc_assert (is_overloaded_fn (from)); |
c6002625 | 841 | /* A baselink is also considered an overloaded function. */ |
4bb0968f | 842 | if (BASELINK_P (from)) |
da15dae6 | 843 | from = BASELINK_FUNCTIONS (from); |
2c73f9f5 ML |
844 | return OVL_CURRENT (from); |
845 | } | |
8d08fdba | 846 | |
8d7f862c JM |
847 | /* Returns nonzero if T is a ->* or .* expression that refers to a |
848 | member function. */ | |
849 | ||
850 | int | |
b57b79f7 | 851 | bound_pmf_p (tree t) |
8d7f862c JM |
852 | { |
853 | return (TREE_CODE (t) == OFFSET_REF | |
854 | && TYPE_PTRMEMFUNC_P (TREE_TYPE (TREE_OPERAND (t, 1)))); | |
855 | } | |
856 | ||
c6002625 | 857 | /* Return a new OVL node, concatenating it with the old one. */ |
2c73f9f5 ML |
858 | |
859 | tree | |
b57b79f7 | 860 | ovl_cons (tree decl, tree chain) |
2c73f9f5 ML |
861 | { |
862 | tree result = make_node (OVERLOAD); | |
863 | TREE_TYPE (result) = unknown_type_node; | |
864 | OVL_FUNCTION (result) = decl; | |
865 | TREE_CHAIN (result) = chain; | |
9f63daea | 866 | |
2c73f9f5 ML |
867 | return result; |
868 | } | |
869 | ||
2c73f9f5 ML |
870 | /* Build a new overloaded function. If this is the first one, |
871 | just return it; otherwise, ovl_cons the _DECLs */ | |
872 | ||
873 | tree | |
b57b79f7 | 874 | build_overload (tree decl, tree chain) |
2c73f9f5 | 875 | { |
161c12b0 | 876 | if (! chain && TREE_CODE (decl) != TEMPLATE_DECL) |
2c73f9f5 | 877 | return decl; |
161c12b0 | 878 | if (chain && TREE_CODE (chain) != OVERLOAD) |
2c73f9f5 ML |
879 | chain = ovl_cons (chain, NULL_TREE); |
880 | return ovl_cons (decl, chain); | |
881 | } | |
882 | ||
8d08fdba MS |
883 | \f |
884 | #define PRINT_RING_SIZE 4 | |
885 | ||
e1def31b | 886 | const char * |
b57b79f7 | 887 | cxx_printable_name (tree decl, int v) |
8d08fdba MS |
888 | { |
889 | static tree decl_ring[PRINT_RING_SIZE]; | |
890 | static char *print_ring[PRINT_RING_SIZE]; | |
891 | static int ring_counter; | |
892 | int i; | |
893 | ||
894 | /* Only cache functions. */ | |
2ba25f50 MS |
895 | if (v < 2 |
896 | || TREE_CODE (decl) != FUNCTION_DECL | |
8d08fdba | 897 | || DECL_LANG_SPECIFIC (decl) == 0) |
2ba25f50 | 898 | return lang_decl_name (decl, v); |
8d08fdba MS |
899 | |
900 | /* See if this print name is lying around. */ | |
901 | for (i = 0; i < PRINT_RING_SIZE; i++) | |
902 | if (decl_ring[i] == decl) | |
903 | /* yes, so return it. */ | |
904 | return print_ring[i]; | |
905 | ||
906 | if (++ring_counter == PRINT_RING_SIZE) | |
907 | ring_counter = 0; | |
908 | ||
909 | if (current_function_decl != NULL_TREE) | |
910 | { | |
911 | if (decl_ring[ring_counter] == current_function_decl) | |
912 | ring_counter += 1; | |
913 | if (ring_counter == PRINT_RING_SIZE) | |
914 | ring_counter = 0; | |
315fb5db | 915 | gcc_assert (decl_ring[ring_counter] != current_function_decl); |
8d08fdba MS |
916 | } |
917 | ||
918 | if (print_ring[ring_counter]) | |
919 | free (print_ring[ring_counter]); | |
920 | ||
2ba25f50 MS |
921 | print_ring[ring_counter] = xstrdup (lang_decl_name (decl, v)); |
922 | decl_ring[ring_counter] = decl; | |
8d08fdba MS |
923 | return print_ring[ring_counter]; |
924 | } | |
925 | \f | |
f30432d7 | 926 | /* Build the FUNCTION_TYPE or METHOD_TYPE which may throw exceptions |
8d08fdba | 927 | listed in RAISES. */ |
e92cc029 | 928 | |
8d08fdba | 929 | tree |
b57b79f7 | 930 | build_exception_variant (tree type, tree raises) |
8d08fdba | 931 | { |
8d08fdba | 932 | tree v = TYPE_MAIN_VARIANT (type); |
91063b51 | 933 | int type_quals = TYPE_QUALS (type); |
8d08fdba | 934 | |
45537677 | 935 | for (; v; v = TYPE_NEXT_VARIANT (v)) |
896c3aa3 JM |
936 | if (check_qualified_type (v, type, type_quals) |
937 | && comp_except_specs (raises, TYPE_RAISES_EXCEPTIONS (v), 1)) | |
4cc1d462 | 938 | return v; |
8d08fdba MS |
939 | |
940 | /* Need to build a new variant. */ | |
8dd16ecc | 941 | v = build_variant_type_copy (type); |
8d08fdba MS |
942 | TYPE_RAISES_EXCEPTIONS (v) = raises; |
943 | return v; | |
944 | } | |
945 | ||
dac65501 KL |
946 | /* Given a TEMPLATE_TEMPLATE_PARM node T, create a new |
947 | BOUND_TEMPLATE_TEMPLATE_PARM bound with NEWARGS as its template | |
1899c3a4 | 948 | arguments. */ |
73b0fce8 KL |
949 | |
950 | tree | |
b57b79f7 | 951 | bind_template_template_parm (tree t, tree newargs) |
73b0fce8 | 952 | { |
1899c3a4 | 953 | tree decl = TYPE_NAME (t); |
6b9b6b15 JM |
954 | tree t2; |
955 | ||
dac65501 KL |
956 | t2 = make_aggr_type (BOUND_TEMPLATE_TEMPLATE_PARM); |
957 | decl = build_decl (TYPE_DECL, DECL_NAME (decl), NULL_TREE); | |
1899c3a4 | 958 | |
dac65501 KL |
959 | /* These nodes have to be created to reflect new TYPE_DECL and template |
960 | arguments. */ | |
961 | TEMPLATE_TYPE_PARM_INDEX (t2) = copy_node (TEMPLATE_TYPE_PARM_INDEX (t)); | |
962 | TEMPLATE_PARM_DECL (TEMPLATE_TYPE_PARM_INDEX (t2)) = decl; | |
963 | TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t2) | |
9f63daea | 964 | = tree_cons (TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL (t), |
dac65501 | 965 | newargs, NULL_TREE); |
6b9b6b15 | 966 | |
1899c3a4 KL |
967 | TREE_TYPE (decl) = t2; |
968 | TYPE_NAME (t2) = decl; | |
969 | TYPE_STUB_DECL (t2) = decl; | |
dac65501 | 970 | TYPE_SIZE (t2) = 0; |
73b0fce8 | 971 | |
73b0fce8 KL |
972 | return t2; |
973 | } | |
974 | ||
bf3428d0 | 975 | /* Called from count_trees via walk_tree. */ |
297a5329 JM |
976 | |
977 | static tree | |
44de5aeb | 978 | count_trees_r (tree *tp, int *walk_subtrees, void *data) |
297a5329 | 979 | { |
44de5aeb RK |
980 | ++*((int *) data); |
981 | ||
982 | if (TYPE_P (*tp)) | |
983 | *walk_subtrees = 0; | |
984 | ||
297a5329 JM |
985 | return NULL_TREE; |
986 | } | |
987 | ||
988 | /* Debugging function for measuring the rough complexity of a tree | |
989 | representation. */ | |
990 | ||
991 | int | |
b57b79f7 | 992 | count_trees (tree t) |
297a5329 | 993 | { |
bf3428d0 | 994 | int n_trees = 0; |
ee94fce6 | 995 | walk_tree_without_duplicates (&t, count_trees_r, &n_trees); |
297a5329 | 996 | return n_trees; |
9f63daea | 997 | } |
297a5329 | 998 | |
b2244c65 MM |
999 | /* Called from verify_stmt_tree via walk_tree. */ |
1000 | ||
1001 | static tree | |
9f63daea EC |
1002 | verify_stmt_tree_r (tree* tp, |
1003 | int* walk_subtrees ATTRIBUTE_UNUSED , | |
b57b79f7 | 1004 | void* data) |
b2244c65 MM |
1005 | { |
1006 | tree t = *tp; | |
1007 | htab_t *statements = (htab_t *) data; | |
1008 | void **slot; | |
1009 | ||
009ed910 | 1010 | if (!STATEMENT_CODE_P (TREE_CODE (t))) |
b2244c65 MM |
1011 | return NULL_TREE; |
1012 | ||
1013 | /* If this statement is already present in the hash table, then | |
1014 | there is a circularity in the statement tree. */ | |
315fb5db | 1015 | gcc_assert (!htab_find (*statements, t)); |
9f63daea | 1016 | |
b2244c65 MM |
1017 | slot = htab_find_slot (*statements, t, INSERT); |
1018 | *slot = t; | |
1019 | ||
1020 | return NULL_TREE; | |
1021 | } | |
1022 | ||
1023 | /* Debugging function to check that the statement T has not been | |
1024 | corrupted. For now, this function simply checks that T contains no | |
1025 | circularities. */ | |
1026 | ||
1027 | void | |
b57b79f7 | 1028 | verify_stmt_tree (tree t) |
b2244c65 MM |
1029 | { |
1030 | htab_t statements; | |
1031 | statements = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL); | |
ee94fce6 | 1032 | walk_tree (&t, verify_stmt_tree_r, &statements, NULL); |
b2244c65 MM |
1033 | htab_delete (statements); |
1034 | } | |
1035 | ||
1036 | /* Called from find_tree via walk_tree. */ | |
1037 | ||
1038 | static tree | |
9f63daea EC |
1039 | find_tree_r (tree* tp, |
1040 | int* walk_subtrees ATTRIBUTE_UNUSED , | |
b57b79f7 | 1041 | void* data) |
b2244c65 MM |
1042 | { |
1043 | if (*tp == (tree) data) | |
1044 | return (tree) data; | |
1045 | ||
1046 | return NULL_TREE; | |
1047 | } | |
1048 | ||
1049 | /* Returns X if X appears in the tree structure rooted at T. */ | |
1050 | ||
1051 | tree | |
b57b79f7 | 1052 | find_tree (tree t, tree x) |
b2244c65 | 1053 | { |
ee94fce6 | 1054 | return walk_tree_without_duplicates (&t, find_tree_r, x); |
b2244c65 MM |
1055 | } |
1056 | ||
50a6dbd7 | 1057 | /* Check if the type T depends on a type with no linkage and if so, return |
4684cd27 MM |
1058 | it. If RELAXED_P then do not consider a class type declared within |
1059 | a TREE_PUBLIC function to have no linkage. */ | |
50a6dbd7 JM |
1060 | |
1061 | tree | |
4684cd27 | 1062 | no_linkage_check (tree t, bool relaxed_p) |
50a6dbd7 | 1063 | { |
caf43ca4 MM |
1064 | tree r; |
1065 | ||
2adeacc9 MM |
1066 | /* There's no point in checking linkage on template functions; we |
1067 | can't know their complete types. */ | |
1068 | if (processing_template_decl) | |
1069 | return NULL_TREE; | |
1070 | ||
caf43ca4 MM |
1071 | switch (TREE_CODE (t)) |
1072 | { | |
4684cd27 MM |
1073 | tree fn; |
1074 | ||
caf43ca4 MM |
1075 | case RECORD_TYPE: |
1076 | if (TYPE_PTRMEMFUNC_P (t)) | |
1077 | goto ptrmem; | |
1078 | /* Fall through. */ | |
1079 | case UNION_TYPE: | |
1080 | if (!CLASS_TYPE_P (t)) | |
1081 | return NULL_TREE; | |
1082 | /* Fall through. */ | |
1083 | case ENUMERAL_TYPE: | |
4684cd27 MM |
1084 | if (TYPE_ANONYMOUS_P (t)) |
1085 | return t; | |
1086 | fn = decl_function_context (TYPE_MAIN_DECL (t)); | |
1087 | if (fn && (!relaxed_p || !TREE_PUBLIC (fn))) | |
caf43ca4 MM |
1088 | return t; |
1089 | return NULL_TREE; | |
1090 | ||
1091 | case ARRAY_TYPE: | |
1092 | case POINTER_TYPE: | |
1093 | case REFERENCE_TYPE: | |
4684cd27 | 1094 | return no_linkage_check (TREE_TYPE (t), relaxed_p); |
caf43ca4 MM |
1095 | |
1096 | case OFFSET_TYPE: | |
1097 | ptrmem: | |
4684cd27 MM |
1098 | r = no_linkage_check (TYPE_PTRMEM_POINTED_TO_TYPE (t), |
1099 | relaxed_p); | |
caf43ca4 MM |
1100 | if (r) |
1101 | return r; | |
4684cd27 | 1102 | return no_linkage_check (TYPE_PTRMEM_CLASS_TYPE (t), relaxed_p); |
caf43ca4 MM |
1103 | |
1104 | case METHOD_TYPE: | |
4684cd27 | 1105 | r = no_linkage_check (TYPE_METHOD_BASETYPE (t), relaxed_p); |
caf43ca4 MM |
1106 | if (r) |
1107 | return r; | |
1108 | /* Fall through. */ | |
1109 | case FUNCTION_TYPE: | |
1110 | { | |
1111 | tree parm; | |
9f63daea EC |
1112 | for (parm = TYPE_ARG_TYPES (t); |
1113 | parm && parm != void_list_node; | |
caf43ca4 MM |
1114 | parm = TREE_CHAIN (parm)) |
1115 | { | |
4684cd27 | 1116 | r = no_linkage_check (TREE_VALUE (parm), relaxed_p); |
caf43ca4 MM |
1117 | if (r) |
1118 | return r; | |
1119 | } | |
4684cd27 | 1120 | return no_linkage_check (TREE_TYPE (t), relaxed_p); |
caf43ca4 MM |
1121 | } |
1122 | ||
1123 | default: | |
1124 | return NULL_TREE; | |
1125 | } | |
50a6dbd7 JM |
1126 | } |
1127 | ||
5566b478 MS |
1128 | #ifdef GATHER_STATISTICS |
1129 | extern int depth_reached; | |
1130 | #endif | |
1131 | ||
8d08fdba | 1132 | void |
b57b79f7 | 1133 | cxx_print_statistics (void) |
8d08fdba | 1134 | { |
8d08fdba MS |
1135 | print_search_statistics (); |
1136 | print_class_statistics (); | |
5566b478 MS |
1137 | #ifdef GATHER_STATISTICS |
1138 | fprintf (stderr, "maximum template instantiation depth reached: %d\n", | |
1139 | depth_reached); | |
1140 | #endif | |
8d08fdba MS |
1141 | } |
1142 | ||
e92cc029 MS |
1143 | /* Return, as an INTEGER_CST node, the number of elements for TYPE |
1144 | (which is an ARRAY_TYPE). This counts only elements of the top | |
1145 | array. */ | |
8d08fdba MS |
1146 | |
1147 | tree | |
b57b79f7 | 1148 | array_type_nelts_top (tree type) |
8d08fdba | 1149 | { |
f293ce4b RS |
1150 | return fold (build2 (PLUS_EXPR, sizetype, |
1151 | array_type_nelts (type), | |
1152 | integer_one_node)); | |
8d08fdba MS |
1153 | } |
1154 | ||
e92cc029 MS |
1155 | /* Return, as an INTEGER_CST node, the number of elements for TYPE |
1156 | (which is an ARRAY_TYPE). This one is a recursive count of all | |
1157 | ARRAY_TYPEs that are clumped together. */ | |
8d08fdba MS |
1158 | |
1159 | tree | |
b57b79f7 | 1160 | array_type_nelts_total (tree type) |
8d08fdba MS |
1161 | { |
1162 | tree sz = array_type_nelts_top (type); | |
1163 | type = TREE_TYPE (type); | |
1164 | while (TREE_CODE (type) == ARRAY_TYPE) | |
1165 | { | |
1166 | tree n = array_type_nelts_top (type); | |
f293ce4b | 1167 | sz = fold (build2 (MULT_EXPR, sizetype, sz, n)); |
8d08fdba MS |
1168 | type = TREE_TYPE (type); |
1169 | } | |
1170 | return sz; | |
1171 | } | |
878cd289 | 1172 | |
b3ab27f3 MM |
1173 | /* Called from break_out_target_exprs via mapcar. */ |
1174 | ||
1175 | static tree | |
b57b79f7 | 1176 | bot_manip (tree* tp, int* walk_subtrees, void* data) |
878cd289 | 1177 | { |
8dfaeb63 MM |
1178 | splay_tree target_remap = ((splay_tree) data); |
1179 | tree t = *tp; | |
1180 | ||
4f976745 | 1181 | if (!TYPE_P (t) && TREE_CONSTANT (t)) |
8dfaeb63 | 1182 | { |
495d26d6 JM |
1183 | /* There can't be any TARGET_EXPRs or their slot variables below |
1184 | this point. We used to check !TREE_SIDE_EFFECTS, but then we | |
1185 | failed to copy an ADDR_EXPR of the slot VAR_DECL. */ | |
8dfaeb63 MM |
1186 | *walk_subtrees = 0; |
1187 | return NULL_TREE; | |
1188 | } | |
495d26d6 | 1189 | if (TREE_CODE (t) == TARGET_EXPR) |
73aad9b9 | 1190 | { |
b3ab27f3 MM |
1191 | tree u; |
1192 | ||
02531345 | 1193 | if (TREE_CODE (TREE_OPERAND (t, 1)) == AGGR_INIT_EXPR) |
73aad9b9 JM |
1194 | { |
1195 | mark_used (TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (t, 1), 0), 0)); | |
b3ab27f3 | 1196 | u = build_cplus_new |
73aad9b9 JM |
1197 | (TREE_TYPE (t), break_out_target_exprs (TREE_OPERAND (t, 1))); |
1198 | } | |
9f63daea | 1199 | else |
b3ab27f3 | 1200 | { |
495d26d6 JM |
1201 | u = build_target_expr_with_type |
1202 | (break_out_target_exprs (TREE_OPERAND (t, 1)), TREE_TYPE (t)); | |
b3ab27f3 MM |
1203 | } |
1204 | ||
1205 | /* Map the old variable to the new one. */ | |
9f63daea EC |
1206 | splay_tree_insert (target_remap, |
1207 | (splay_tree_key) TREE_OPERAND (t, 0), | |
b3ab27f3 | 1208 | (splay_tree_value) TREE_OPERAND (u, 0)); |
8dfaeb63 MM |
1209 | |
1210 | /* Replace the old expression with the new version. */ | |
1211 | *tp = u; | |
1212 | /* We don't have to go below this point; the recursive call to | |
1213 | break_out_target_exprs will have handled anything below this | |
1214 | point. */ | |
1215 | *walk_subtrees = 0; | |
1216 | return NULL_TREE; | |
73aad9b9 JM |
1217 | } |
1218 | else if (TREE_CODE (t) == CALL_EXPR) | |
1219 | mark_used (TREE_OPERAND (TREE_OPERAND (t, 0), 0)); | |
1220 | ||
8dfaeb63 MM |
1221 | /* Make a copy of this node. */ |
1222 | return copy_tree_r (tp, walk_subtrees, NULL); | |
878cd289 | 1223 | } |
9f63daea | 1224 | |
8dfaeb63 MM |
1225 | /* Replace all remapped VAR_DECLs in T with their new equivalents. |
1226 | DATA is really a splay-tree mapping old variables to new | |
1227 | variables. */ | |
b3ab27f3 MM |
1228 | |
1229 | static tree | |
9f63daea EC |
1230 | bot_replace (tree* t, |
1231 | int* walk_subtrees ATTRIBUTE_UNUSED , | |
b57b79f7 | 1232 | void* data) |
b3ab27f3 | 1233 | { |
8dfaeb63 MM |
1234 | splay_tree target_remap = ((splay_tree) data); |
1235 | ||
b3ab27f3 MM |
1236 | if (TREE_CODE (*t) == VAR_DECL) |
1237 | { | |
1238 | splay_tree_node n = splay_tree_lookup (target_remap, | |
1239 | (splay_tree_key) *t); | |
1240 | if (n) | |
1241 | *t = (tree) n->value; | |
1242 | } | |
1243 | ||
1244 | return NULL_TREE; | |
1245 | } | |
9f63daea | 1246 | |
8dfaeb63 MM |
1247 | /* When we parse a default argument expression, we may create |
1248 | temporary variables via TARGET_EXPRs. When we actually use the | |
1249 | default-argument expression, we make a copy of the expression, but | |
1250 | we must replace the temporaries with appropriate local versions. */ | |
e92cc029 | 1251 | |
878cd289 | 1252 | tree |
b57b79f7 | 1253 | break_out_target_exprs (tree t) |
878cd289 | 1254 | { |
8dfaeb63 MM |
1255 | static int target_remap_count; |
1256 | static splay_tree target_remap; | |
1257 | ||
b3ab27f3 | 1258 | if (!target_remap_count++) |
9f63daea EC |
1259 | target_remap = splay_tree_new (splay_tree_compare_pointers, |
1260 | /*splay_tree_delete_key_fn=*/NULL, | |
b3ab27f3 | 1261 | /*splay_tree_delete_value_fn=*/NULL); |
ee94fce6 MM |
1262 | walk_tree (&t, bot_manip, target_remap, NULL); |
1263 | walk_tree (&t, bot_replace, target_remap, NULL); | |
b3ab27f3 MM |
1264 | |
1265 | if (!--target_remap_count) | |
1266 | { | |
1267 | splay_tree_delete (target_remap); | |
1268 | target_remap = NULL; | |
1269 | } | |
1270 | ||
1271 | return t; | |
878cd289 | 1272 | } |
f30432d7 | 1273 | |
8e1daa34 NS |
1274 | /* Similar to `build_nt', but for template definitions of dependent |
1275 | expressions */ | |
5566b478 MS |
1276 | |
1277 | tree | |
e34d07f2 | 1278 | build_min_nt (enum tree_code code, ...) |
5566b478 | 1279 | { |
926ce8bd KH |
1280 | tree t; |
1281 | int length; | |
1282 | int i; | |
e34d07f2 | 1283 | va_list p; |
5566b478 | 1284 | |
e34d07f2 | 1285 | va_start (p, code); |
5566b478 | 1286 | |
5566b478 | 1287 | t = make_node (code); |
8d5e6e25 | 1288 | length = TREE_CODE_LENGTH (code); |
5566b478 MS |
1289 | |
1290 | for (i = 0; i < length; i++) | |
1291 | { | |
1292 | tree x = va_arg (p, tree); | |
2a1e9fdd | 1293 | TREE_OPERAND (t, i) = x; |
5566b478 MS |
1294 | } |
1295 | ||
e34d07f2 | 1296 | va_end (p); |
5566b478 MS |
1297 | return t; |
1298 | } | |
1299 | ||
8e1daa34 | 1300 | /* Similar to `build', but for template definitions. */ |
5566b478 MS |
1301 | |
1302 | tree | |
e34d07f2 | 1303 | build_min (enum tree_code code, tree tt, ...) |
5566b478 | 1304 | { |
926ce8bd KH |
1305 | tree t; |
1306 | int length; | |
1307 | int i; | |
e34d07f2 | 1308 | va_list p; |
5566b478 | 1309 | |
e34d07f2 | 1310 | va_start (p, tt); |
5566b478 | 1311 | |
5566b478 | 1312 | t = make_node (code); |
8d5e6e25 | 1313 | length = TREE_CODE_LENGTH (code); |
2a1e9fdd | 1314 | TREE_TYPE (t) = tt; |
5566b478 MS |
1315 | |
1316 | for (i = 0; i < length; i++) | |
1317 | { | |
1318 | tree x = va_arg (p, tree); | |
2a1e9fdd | 1319 | TREE_OPERAND (t, i) = x; |
4f976745 | 1320 | if (x && !TYPE_P (x) && TREE_SIDE_EFFECTS (x)) |
8e1daa34 | 1321 | TREE_SIDE_EFFECTS (t) = 1; |
5566b478 MS |
1322 | } |
1323 | ||
e34d07f2 | 1324 | va_end (p); |
5566b478 MS |
1325 | return t; |
1326 | } | |
1327 | ||
8e1daa34 NS |
1328 | /* Similar to `build', but for template definitions of non-dependent |
1329 | expressions. NON_DEP is the non-dependent expression that has been | |
1330 | built. */ | |
1331 | ||
1332 | tree | |
1333 | build_min_non_dep (enum tree_code code, tree non_dep, ...) | |
1334 | { | |
926ce8bd KH |
1335 | tree t; |
1336 | int length; | |
1337 | int i; | |
8e1daa34 NS |
1338 | va_list p; |
1339 | ||
1340 | va_start (p, non_dep); | |
1341 | ||
1342 | t = make_node (code); | |
1343 | length = TREE_CODE_LENGTH (code); | |
1344 | TREE_TYPE (t) = TREE_TYPE (non_dep); | |
8e1daa34 NS |
1345 | TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (non_dep); |
1346 | ||
1347 | for (i = 0; i < length; i++) | |
1348 | { | |
1349 | tree x = va_arg (p, tree); | |
1350 | TREE_OPERAND (t, i) = x; | |
1351 | } | |
1352 | ||
1353 | if (code == COMPOUND_EXPR && TREE_CODE (non_dep) != COMPOUND_EXPR) | |
1354 | /* This should not be considered a COMPOUND_EXPR, because it | |
04c06002 | 1355 | resolves to an overload. */ |
8e1daa34 | 1356 | COMPOUND_EXPR_OVERLOADED (t) = 1; |
9f63daea | 1357 | |
8e1daa34 NS |
1358 | va_end (p); |
1359 | return t; | |
1360 | } | |
1361 | ||
5566b478 | 1362 | tree |
b57b79f7 | 1363 | get_type_decl (tree t) |
5566b478 | 1364 | { |
5566b478 MS |
1365 | if (TREE_CODE (t) == TYPE_DECL) |
1366 | return t; | |
2f939d94 | 1367 | if (TYPE_P (t)) |
5566b478 | 1368 | return TYPE_STUB_DECL (t); |
315fb5db NS |
1369 | gcc_assert (t == error_mark_node); |
1370 | return t; | |
5566b478 MS |
1371 | } |
1372 | ||
700466c2 JM |
1373 | /* Returns the namespace that contains DECL, whether directly or |
1374 | indirectly. */ | |
1375 | ||
1376 | tree | |
b57b79f7 | 1377 | decl_namespace_context (tree decl) |
700466c2 JM |
1378 | { |
1379 | while (1) | |
1380 | { | |
1381 | if (TREE_CODE (decl) == NAMESPACE_DECL) | |
1382 | return decl; | |
1383 | else if (TYPE_P (decl)) | |
1384 | decl = CP_DECL_CONTEXT (TYPE_MAIN_DECL (decl)); | |
1385 | else | |
1386 | decl = CP_DECL_CONTEXT (decl); | |
1387 | } | |
1388 | } | |
1389 | ||
67d743fe | 1390 | /* Return truthvalue of whether T1 is the same tree structure as T2. |
c8a209ca | 1391 | Return 1 if they are the same. Return 0 if they are different. */ |
67d743fe | 1392 | |
c8a209ca | 1393 | bool |
b57b79f7 | 1394 | cp_tree_equal (tree t1, tree t2) |
67d743fe | 1395 | { |
926ce8bd | 1396 | enum tree_code code1, code2; |
67d743fe MS |
1397 | |
1398 | if (t1 == t2) | |
c8a209ca NS |
1399 | return true; |
1400 | if (!t1 || !t2) | |
1401 | return false; | |
1402 | ||
1403 | for (code1 = TREE_CODE (t1); | |
1404 | code1 == NOP_EXPR || code1 == CONVERT_EXPR | |
1405 | || code1 == NON_LVALUE_EXPR; | |
1406 | code1 = TREE_CODE (t1)) | |
1407 | t1 = TREE_OPERAND (t1, 0); | |
1408 | for (code2 = TREE_CODE (t2); | |
1409 | code2 == NOP_EXPR || code2 == CONVERT_EXPR | |
1410 | || code1 == NON_LVALUE_EXPR; | |
1411 | code2 = TREE_CODE (t2)) | |
1412 | t2 = TREE_OPERAND (t2, 0); | |
1413 | ||
1414 | /* They might have become equal now. */ | |
1415 | if (t1 == t2) | |
1416 | return true; | |
9f63daea | 1417 | |
67d743fe | 1418 | if (code1 != code2) |
c8a209ca | 1419 | return false; |
67d743fe MS |
1420 | |
1421 | switch (code1) | |
1422 | { | |
1423 | case INTEGER_CST: | |
1424 | return TREE_INT_CST_LOW (t1) == TREE_INT_CST_LOW (t2) | |
1425 | && TREE_INT_CST_HIGH (t1) == TREE_INT_CST_HIGH (t2); | |
1426 | ||
1427 | case REAL_CST: | |
1428 | return REAL_VALUES_EQUAL (TREE_REAL_CST (t1), TREE_REAL_CST (t2)); | |
1429 | ||
1430 | case STRING_CST: | |
1431 | return TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2) | |
da61dec9 | 1432 | && !memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2), |
c8a209ca | 1433 | TREE_STRING_LENGTH (t1)); |
67d743fe MS |
1434 | |
1435 | case CONSTRUCTOR: | |
7dd4bdf5 MM |
1436 | /* We need to do this when determining whether or not two |
1437 | non-type pointer to member function template arguments | |
1438 | are the same. */ | |
3bfdc719 | 1439 | if (!(same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)) |
7dd4bdf5 MM |
1440 | /* The first operand is RTL. */ |
1441 | && TREE_OPERAND (t1, 0) == TREE_OPERAND (t2, 0))) | |
c8a209ca | 1442 | return false; |
7dd4bdf5 MM |
1443 | return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)); |
1444 | ||
1445 | case TREE_LIST: | |
c8a209ca NS |
1446 | if (!cp_tree_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2))) |
1447 | return false; | |
1448 | if (!cp_tree_equal (TREE_VALUE (t1), TREE_VALUE (t2))) | |
1449 | return false; | |
7dd4bdf5 | 1450 | return cp_tree_equal (TREE_CHAIN (t1), TREE_CHAIN (t2)); |
67d743fe MS |
1451 | |
1452 | case SAVE_EXPR: | |
1453 | return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); | |
1454 | ||
1455 | case CALL_EXPR: | |
c8a209ca NS |
1456 | if (!cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))) |
1457 | return false; | |
67d743fe MS |
1458 | return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)); |
1459 | ||
c8a209ca NS |
1460 | case TARGET_EXPR: |
1461 | { | |
1462 | tree o1 = TREE_OPERAND (t1, 0); | |
1463 | tree o2 = TREE_OPERAND (t2, 0); | |
9f63daea | 1464 | |
c8a209ca NS |
1465 | /* Special case: if either target is an unallocated VAR_DECL, |
1466 | it means that it's going to be unified with whatever the | |
1467 | TARGET_EXPR is really supposed to initialize, so treat it | |
1468 | as being equivalent to anything. */ | |
1469 | if (TREE_CODE (o1) == VAR_DECL && DECL_NAME (o1) == NULL_TREE | |
1470 | && !DECL_RTL_SET_P (o1)) | |
1471 | /*Nop*/; | |
1472 | else if (TREE_CODE (o2) == VAR_DECL && DECL_NAME (o2) == NULL_TREE | |
1473 | && !DECL_RTL_SET_P (o2)) | |
1474 | /*Nop*/; | |
1475 | else if (!cp_tree_equal (o1, o2)) | |
1476 | return false; | |
9f63daea | 1477 | |
c8a209ca NS |
1478 | return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)); |
1479 | } | |
9f63daea | 1480 | |
67d743fe | 1481 | case WITH_CLEANUP_EXPR: |
c8a209ca NS |
1482 | if (!cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))) |
1483 | return false; | |
6ad7895a | 1484 | return cp_tree_equal (TREE_OPERAND (t1, 1), TREE_OPERAND (t1, 1)); |
67d743fe MS |
1485 | |
1486 | case COMPONENT_REF: | |
c8a209ca NS |
1487 | if (TREE_OPERAND (t1, 1) != TREE_OPERAND (t2, 1)) |
1488 | return false; | |
1489 | return cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0)); | |
67d743fe MS |
1490 | |
1491 | case VAR_DECL: | |
1492 | case PARM_DECL: | |
1493 | case CONST_DECL: | |
1494 | case FUNCTION_DECL: | |
c8a209ca NS |
1495 | case TEMPLATE_DECL: |
1496 | case IDENTIFIER_NODE: | |
1497 | return false; | |
67d743fe | 1498 | |
f84b4be9 | 1499 | case TEMPLATE_PARM_INDEX: |
31758337 NS |
1500 | return (TEMPLATE_PARM_IDX (t1) == TEMPLATE_PARM_IDX (t2) |
1501 | && TEMPLATE_PARM_LEVEL (t1) == TEMPLATE_PARM_LEVEL (t2) | |
1502 | && same_type_p (TREE_TYPE (TEMPLATE_PARM_DECL (t1)), | |
1503 | TREE_TYPE (TEMPLATE_PARM_DECL (t2)))); | |
67d743fe | 1504 | |
bf12d54d NS |
1505 | case TEMPLATE_ID_EXPR: |
1506 | { | |
1507 | unsigned ix; | |
1508 | tree vec1, vec2; | |
9f63daea | 1509 | |
bf12d54d NS |
1510 | if (!cp_tree_equal (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))) |
1511 | return false; | |
1512 | vec1 = TREE_OPERAND (t1, 1); | |
1513 | vec2 = TREE_OPERAND (t2, 1); | |
1514 | ||
1515 | if (!vec1 || !vec2) | |
1516 | return !vec1 && !vec2; | |
9f63daea | 1517 | |
bf12d54d NS |
1518 | if (TREE_VEC_LENGTH (vec1) != TREE_VEC_LENGTH (vec2)) |
1519 | return false; | |
1520 | ||
1521 | for (ix = TREE_VEC_LENGTH (vec1); ix--;) | |
1522 | if (!cp_tree_equal (TREE_VEC_ELT (vec1, ix), | |
1523 | TREE_VEC_ELT (vec2, ix))) | |
1524 | return false; | |
9f63daea | 1525 | |
bf12d54d NS |
1526 | return true; |
1527 | } | |
9f63daea | 1528 | |
67d743fe | 1529 | case SIZEOF_EXPR: |
abff8e06 | 1530 | case ALIGNOF_EXPR: |
c8a209ca NS |
1531 | { |
1532 | tree o1 = TREE_OPERAND (t1, 0); | |
1533 | tree o2 = TREE_OPERAND (t2, 0); | |
9f63daea | 1534 | |
c8a209ca NS |
1535 | if (TREE_CODE (o1) != TREE_CODE (o2)) |
1536 | return false; | |
1537 | if (TYPE_P (o1)) | |
1538 | return same_type_p (o1, o2); | |
1539 | else | |
1540 | return cp_tree_equal (o1, o2); | |
1541 | } | |
9f63daea | 1542 | |
61a127b3 MM |
1543 | case PTRMEM_CST: |
1544 | /* Two pointer-to-members are the same if they point to the same | |
1545 | field or function in the same class. */ | |
c8a209ca NS |
1546 | if (PTRMEM_CST_MEMBER (t1) != PTRMEM_CST_MEMBER (t2)) |
1547 | return false; | |
1548 | ||
1549 | return same_type_p (PTRMEM_CST_CLASS (t1), PTRMEM_CST_CLASS (t2)); | |
61a127b3 | 1550 | |
7f85441b KG |
1551 | default: |
1552 | break; | |
67d743fe MS |
1553 | } |
1554 | ||
1555 | switch (TREE_CODE_CLASS (code1)) | |
1556 | { | |
6615c446 JO |
1557 | case tcc_unary: |
1558 | case tcc_binary: | |
1559 | case tcc_comparison: | |
1560 | case tcc_expression: | |
1561 | case tcc_reference: | |
1562 | case tcc_statement: | |
aa1826e2 NS |
1563 | { |
1564 | int i; | |
9f63daea | 1565 | |
aa1826e2 | 1566 | for (i = 0; i < TREE_CODE_LENGTH (code1); ++i) |
c8a209ca NS |
1567 | if (!cp_tree_equal (TREE_OPERAND (t1, i), TREE_OPERAND (t2, i))) |
1568 | return false; | |
9f63daea | 1569 | |
c8a209ca | 1570 | return true; |
aa1826e2 | 1571 | } |
9f63daea | 1572 | |
6615c446 | 1573 | case tcc_type: |
c8a209ca | 1574 | return same_type_p (t1, t2); |
6615c446 JO |
1575 | default: |
1576 | gcc_unreachable (); | |
67d743fe | 1577 | } |
6615c446 | 1578 | /* We can get here with --disable-checking. */ |
c8a209ca | 1579 | return false; |
67d743fe | 1580 | } |
73aad9b9 | 1581 | |
d11ad92e MS |
1582 | /* The type of ARG when used as an lvalue. */ |
1583 | ||
1584 | tree | |
b57b79f7 | 1585 | lvalue_type (tree arg) |
d11ad92e | 1586 | { |
2c73f9f5 | 1587 | tree type = TREE_TYPE (arg); |
8cd4c175 | 1588 | return type; |
d11ad92e MS |
1589 | } |
1590 | ||
1591 | /* The type of ARG for printing error messages; denote lvalues with | |
1592 | reference types. */ | |
1593 | ||
1594 | tree | |
b57b79f7 | 1595 | error_type (tree arg) |
d11ad92e MS |
1596 | { |
1597 | tree type = TREE_TYPE (arg); | |
9f63daea | 1598 | |
d11ad92e MS |
1599 | if (TREE_CODE (type) == ARRAY_TYPE) |
1600 | ; | |
08476342 NS |
1601 | else if (TREE_CODE (type) == ERROR_MARK) |
1602 | ; | |
d11ad92e MS |
1603 | else if (real_lvalue_p (arg)) |
1604 | type = build_reference_type (lvalue_type (arg)); | |
1605 | else if (IS_AGGR_TYPE (type)) | |
1606 | type = lvalue_type (arg); | |
1607 | ||
1608 | return type; | |
1609 | } | |
eb66be0e MS |
1610 | |
1611 | /* Does FUNCTION use a variable-length argument list? */ | |
1612 | ||
1613 | int | |
b57b79f7 | 1614 | varargs_function_p (tree function) |
eb66be0e MS |
1615 | { |
1616 | tree parm = TYPE_ARG_TYPES (TREE_TYPE (function)); | |
1617 | for (; parm; parm = TREE_CHAIN (parm)) | |
1618 | if (TREE_VALUE (parm) == void_type_node) | |
1619 | return 0; | |
1620 | return 1; | |
1621 | } | |
f94ae2f5 JM |
1622 | |
1623 | /* Returns 1 if decl is a member of a class. */ | |
1624 | ||
1625 | int | |
b57b79f7 | 1626 | member_p (tree decl) |
f94ae2f5 | 1627 | { |
2f939d94 TP |
1628 | const tree ctx = DECL_CONTEXT (decl); |
1629 | return (ctx && TYPE_P (ctx)); | |
f94ae2f5 | 1630 | } |
51924768 JM |
1631 | |
1632 | /* Create a placeholder for member access where we don't actually have an | |
1633 | object that the access is against. */ | |
1634 | ||
1635 | tree | |
b57b79f7 | 1636 | build_dummy_object (tree type) |
51924768 | 1637 | { |
44689c12 | 1638 | tree decl = build1 (NOP_EXPR, build_pointer_type (type), void_zero_node); |
3e411c3f | 1639 | return build_indirect_ref (decl, NULL); |
51924768 JM |
1640 | } |
1641 | ||
1642 | /* We've gotten a reference to a member of TYPE. Return *this if appropriate, | |
1643 | or a dummy object otherwise. If BINFOP is non-0, it is filled with the | |
1644 | binfo path from current_class_type to TYPE, or 0. */ | |
1645 | ||
1646 | tree | |
b57b79f7 | 1647 | maybe_dummy_object (tree type, tree* binfop) |
51924768 JM |
1648 | { |
1649 | tree decl, context; | |
2db1ab2d | 1650 | tree binfo; |
9f63daea | 1651 | |
51924768 | 1652 | if (current_class_type |
2db1ab2d NS |
1653 | && (binfo = lookup_base (current_class_type, type, |
1654 | ba_ignore | ba_quiet, NULL))) | |
51924768 JM |
1655 | context = current_class_type; |
1656 | else | |
1657 | { | |
1658 | /* Reference from a nested class member function. */ | |
1659 | context = type; | |
2db1ab2d | 1660 | binfo = TYPE_BINFO (type); |
51924768 JM |
1661 | } |
1662 | ||
2db1ab2d NS |
1663 | if (binfop) |
1664 | *binfop = binfo; | |
9f63daea | 1665 | |
a29e1034 | 1666 | if (current_class_ref && context == current_class_type |
3ebf5204 NS |
1667 | /* Kludge: Make sure that current_class_type is actually |
1668 | correct. It might not be if we're in the middle of | |
c6002625 | 1669 | tsubst_default_argument. */ |
a29e1034 JM |
1670 | && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (current_class_ref)), |
1671 | current_class_type)) | |
51924768 JM |
1672 | decl = current_class_ref; |
1673 | else | |
1674 | decl = build_dummy_object (context); | |
1675 | ||
1676 | return decl; | |
1677 | } | |
1678 | ||
1679 | /* Returns 1 if OB is a placeholder object, or a pointer to one. */ | |
1680 | ||
1681 | int | |
b57b79f7 | 1682 | is_dummy_object (tree ob) |
51924768 JM |
1683 | { |
1684 | if (TREE_CODE (ob) == INDIRECT_REF) | |
1685 | ob = TREE_OPERAND (ob, 0); | |
1686 | return (TREE_CODE (ob) == NOP_EXPR | |
44689c12 | 1687 | && TREE_OPERAND (ob, 0) == void_zero_node); |
51924768 | 1688 | } |
5524676d JM |
1689 | |
1690 | /* Returns 1 iff type T is a POD type, as defined in [basic.types]. */ | |
1691 | ||
1692 | int | |
b57b79f7 | 1693 | pod_type_p (tree t) |
5524676d | 1694 | { |
38da6039 | 1695 | t = strip_array_types (t); |
5524676d | 1696 | |
17bbb839 MM |
1697 | if (t == error_mark_node) |
1698 | return 1; | |
52fb2769 NS |
1699 | if (INTEGRAL_TYPE_P (t)) |
1700 | return 1; /* integral, character or enumeral type */ | |
1701 | if (FLOAT_TYPE_P (t)) | |
5524676d | 1702 | return 1; |
52fb2769 NS |
1703 | if (TYPE_PTR_P (t)) |
1704 | return 1; /* pointer to non-member */ | |
a5ac359a MM |
1705 | if (TYPE_PTR_TO_MEMBER_P (t)) |
1706 | return 1; /* pointer to member */ | |
b1009a5d ZL |
1707 | |
1708 | if (TREE_CODE (t) == VECTOR_TYPE) | |
1709 | return 1; /* vectors are (small) arrays if scalars */ | |
1710 | ||
52fb2769 NS |
1711 | if (! CLASS_TYPE_P (t)) |
1712 | return 0; /* other non-class type (reference or function) */ | |
1713 | if (CLASSTYPE_NON_POD_P (t)) | |
5524676d | 1714 | return 0; |
5524676d JM |
1715 | return 1; |
1716 | } | |
e5dc5fb2 | 1717 | |
94e6e4c4 AO |
1718 | /* Returns 1 iff zero initialization of type T means actually storing |
1719 | zeros in it. */ | |
1720 | ||
1721 | int | |
b57b79f7 | 1722 | zero_init_p (tree t) |
94e6e4c4 AO |
1723 | { |
1724 | t = strip_array_types (t); | |
1725 | ||
17bbb839 MM |
1726 | if (t == error_mark_node) |
1727 | return 1; | |
1728 | ||
94e6e4c4 AO |
1729 | /* NULL pointers to data members are initialized with -1. */ |
1730 | if (TYPE_PTRMEM_P (t)) | |
1731 | return 0; | |
1732 | ||
1733 | /* Classes that contain types that can't be zero-initialized, cannot | |
1734 | be zero-initialized themselves. */ | |
1735 | if (CLASS_TYPE_P (t) && CLASSTYPE_NON_ZERO_INIT_P (t)) | |
1736 | return 0; | |
1737 | ||
1738 | return 1; | |
1739 | } | |
1740 | ||
91d231cb | 1741 | /* Table of valid C++ attributes. */ |
349ae713 | 1742 | const struct attribute_spec cxx_attribute_table[] = |
e5dc5fb2 | 1743 | { |
91d231cb JM |
1744 | /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ |
1745 | { "java_interface", 0, 0, false, false, false, handle_java_interface_attribute }, | |
1746 | { "com_interface", 0, 0, false, false, false, handle_com_interface_attribute }, | |
1747 | { "init_priority", 1, 1, true, false, false, handle_init_priority_attribute }, | |
1748 | { NULL, 0, 0, false, false, false, NULL } | |
1749 | }; | |
1750 | ||
1751 | /* Handle a "java_interface" attribute; arguments as in | |
1752 | struct attribute_spec.handler. */ | |
1753 | static tree | |
9f63daea EC |
1754 | handle_java_interface_attribute (tree* node, |
1755 | tree name, | |
1756 | tree args ATTRIBUTE_UNUSED , | |
1757 | int flags, | |
b57b79f7 | 1758 | bool* no_add_attrs) |
91d231cb JM |
1759 | { |
1760 | if (DECL_P (*node) | |
1761 | || !CLASS_TYPE_P (*node) | |
1762 | || !TYPE_FOR_JAVA (*node)) | |
60c87482 | 1763 | { |
4460cef2 GDR |
1764 | error ("`%E' attribute can only be applied to Java class definitions", |
1765 | name); | |
91d231cb JM |
1766 | *no_add_attrs = true; |
1767 | return NULL_TREE; | |
60c87482 | 1768 | } |
91d231cb | 1769 | if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) |
8dd16ecc | 1770 | *node = build_variant_type_copy (*node); |
91d231cb | 1771 | TYPE_JAVA_INTERFACE (*node) = 1; |
e5dc5fb2 | 1772 | |
91d231cb JM |
1773 | return NULL_TREE; |
1774 | } | |
1775 | ||
1776 | /* Handle a "com_interface" attribute; arguments as in | |
1777 | struct attribute_spec.handler. */ | |
1778 | static tree | |
9f63daea EC |
1779 | handle_com_interface_attribute (tree* node, |
1780 | tree name, | |
1781 | tree args ATTRIBUTE_UNUSED , | |
1782 | int flags ATTRIBUTE_UNUSED , | |
b57b79f7 | 1783 | bool* no_add_attrs) |
91d231cb JM |
1784 | { |
1785 | static int warned; | |
1786 | ||
1787 | *no_add_attrs = true; | |
1788 | ||
1789 | if (DECL_P (*node) | |
1790 | || !CLASS_TYPE_P (*node) | |
1791 | || *node != TYPE_MAIN_VARIANT (*node)) | |
e5dc5fb2 | 1792 | { |
4460cef2 GDR |
1793 | warning ("`%E' attribute can only be applied to class definitions", |
1794 | name); | |
91d231cb JM |
1795 | return NULL_TREE; |
1796 | } | |
e5dc5fb2 | 1797 | |
91d231cb | 1798 | if (!warned++) |
4460cef2 GDR |
1799 | warning ("`%E' is obsolete; g++ vtables are now COM-compatible by default", |
1800 | name); | |
91d231cb JM |
1801 | |
1802 | return NULL_TREE; | |
1803 | } | |
1804 | ||
1805 | /* Handle an "init_priority" attribute; arguments as in | |
1806 | struct attribute_spec.handler. */ | |
1807 | static tree | |
9f63daea EC |
1808 | handle_init_priority_attribute (tree* node, |
1809 | tree name, | |
1810 | tree args, | |
1811 | int flags ATTRIBUTE_UNUSED , | |
b57b79f7 | 1812 | bool* no_add_attrs) |
91d231cb JM |
1813 | { |
1814 | tree initp_expr = TREE_VALUE (args); | |
1815 | tree decl = *node; | |
1816 | tree type = TREE_TYPE (decl); | |
1817 | int pri; | |
1818 | ||
1819 | STRIP_NOPS (initp_expr); | |
9f63daea | 1820 | |
91d231cb JM |
1821 | if (!initp_expr || TREE_CODE (initp_expr) != INTEGER_CST) |
1822 | { | |
1823 | error ("requested init_priority is not an integer constant"); | |
1824 | *no_add_attrs = true; | |
1825 | return NULL_TREE; | |
1826 | } | |
e5dc5fb2 | 1827 | |
91d231cb | 1828 | pri = TREE_INT_CST_LOW (initp_expr); |
9f63daea | 1829 | |
91d231cb JM |
1830 | type = strip_array_types (type); |
1831 | ||
1832 | if (decl == NULL_TREE | |
1833 | || TREE_CODE (decl) != VAR_DECL | |
1834 | || !TREE_STATIC (decl) | |
1835 | || DECL_EXTERNAL (decl) | |
1836 | || (TREE_CODE (type) != RECORD_TYPE | |
1837 | && TREE_CODE (type) != UNION_TYPE) | |
1838 | /* Static objects in functions are initialized the | |
1839 | first time control passes through that | |
1840 | function. This is not precise enough to pin down an | |
c6002625 | 1841 | init_priority value, so don't allow it. */ |
9f63daea | 1842 | || current_function_decl) |
91d231cb | 1843 | { |
4460cef2 GDR |
1844 | error ("can only use `%E' attribute on file-scope definitions " |
1845 | "of objects of class type", name); | |
91d231cb JM |
1846 | *no_add_attrs = true; |
1847 | return NULL_TREE; | |
1848 | } | |
e5dc5fb2 | 1849 | |
91d231cb JM |
1850 | if (pri > MAX_INIT_PRIORITY || pri <= 0) |
1851 | { | |
1852 | error ("requested init_priority is out of range"); | |
1853 | *no_add_attrs = true; | |
1854 | return NULL_TREE; | |
1855 | } | |
e5dc5fb2 | 1856 | |
91d231cb JM |
1857 | /* Check for init_priorities that are reserved for |
1858 | language and runtime support implementations.*/ | |
1859 | if (pri <= MAX_RESERVED_INIT_PRIORITY) | |
1860 | { | |
9f63daea | 1861 | warning |
91d231cb | 1862 | ("requested init_priority is reserved for internal use"); |
e5dc5fb2 JM |
1863 | } |
1864 | ||
91d231cb JM |
1865 | if (SUPPORTS_INIT_PRIORITY) |
1866 | { | |
1867 | DECL_INIT_PRIORITY (decl) = pri; | |
1868 | return NULL_TREE; | |
1869 | } | |
1870 | else | |
1871 | { | |
4460cef2 | 1872 | error ("`%E' attribute is not supported on this platform", name); |
91d231cb JM |
1873 | *no_add_attrs = true; |
1874 | return NULL_TREE; | |
1875 | } | |
e5dc5fb2 | 1876 | } |
87533b37 | 1877 | |
406d77a4 SB |
1878 | /* Return a new TINST_LEVEL for DECL at location locus. */ |
1879 | tree | |
1880 | make_tinst_level (tree decl, location_t locus) | |
1881 | { | |
1882 | tree tinst_level = make_node (TINST_LEVEL); | |
1883 | TREE_CHAIN (tinst_level) = NULL_TREE; | |
1884 | TINST_DECL (tinst_level) = decl; | |
1885 | TINST_LOCATION (tinst_level) = locus; | |
1886 | return tinst_level; | |
1887 | } | |
1888 | ||
87533b37 MM |
1889 | /* Return a new PTRMEM_CST of the indicated TYPE. The MEMBER is the |
1890 | thing pointed to by the constant. */ | |
1891 | ||
1892 | tree | |
b57b79f7 | 1893 | make_ptrmem_cst (tree type, tree member) |
87533b37 MM |
1894 | { |
1895 | tree ptrmem_cst = make_node (PTRMEM_CST); | |
87533b37 MM |
1896 | TREE_TYPE (ptrmem_cst) = type; |
1897 | PTRMEM_CST_MEMBER (ptrmem_cst) = member; | |
1898 | return ptrmem_cst; | |
1899 | } | |
1900 | ||
e9525111 MM |
1901 | /* Build a variant of TYPE that has the indicated ATTRIBUTES. May |
1902 | return an existing type of an appropriate type already exists. */ | |
1903 | ||
1904 | tree | |
1905 | cp_build_type_attribute_variant (tree type, tree attributes) | |
1906 | { | |
1907 | tree new_type; | |
1908 | ||
1909 | new_type = build_type_attribute_variant (type, attributes); | |
1910 | if (TREE_CODE (new_type) == FUNCTION_TYPE | |
9f63daea | 1911 | && (TYPE_RAISES_EXCEPTIONS (new_type) |
e9525111 MM |
1912 | != TYPE_RAISES_EXCEPTIONS (type))) |
1913 | new_type = build_exception_variant (new_type, | |
1914 | TYPE_RAISES_EXCEPTIONS (type)); | |
1915 | return new_type; | |
1916 | } | |
1917 | ||
25af8512 | 1918 | /* Apply FUNC to all language-specific sub-trees of TP in a pre-order |
350fae66 | 1919 | traversal. Called from walk_tree. */ |
25af8512 | 1920 | |
9f63daea | 1921 | tree |
350fae66 RK |
1922 | cp_walk_subtrees (tree *tp, int *walk_subtrees_p, walk_tree_fn func, |
1923 | void *data, void *htab) | |
25af8512 AO |
1924 | { |
1925 | enum tree_code code = TREE_CODE (*tp); | |
6de9cd9a | 1926 | location_t save_locus; |
25af8512 | 1927 | tree result; |
9f63daea | 1928 | |
25af8512 AO |
1929 | #define WALK_SUBTREE(NODE) \ |
1930 | do \ | |
1931 | { \ | |
1932 | result = walk_tree (&(NODE), func, data, htab); \ | |
6de9cd9a | 1933 | if (result) goto out; \ |
25af8512 AO |
1934 | } \ |
1935 | while (0) | |
1936 | ||
6de9cd9a DN |
1937 | /* Set input_location here so we get the right instantiation context |
1938 | if we call instantiate_decl from inlinable_function_p. */ | |
1939 | save_locus = input_location; | |
93409b8c PB |
1940 | if (EXPR_HAS_LOCATION (*tp)) |
1941 | input_location = EXPR_LOCATION (*tp); | |
6de9cd9a | 1942 | |
25af8512 AO |
1943 | /* Not one of the easy cases. We must explicitly go through the |
1944 | children. */ | |
6de9cd9a | 1945 | result = NULL_TREE; |
25af8512 AO |
1946 | switch (code) |
1947 | { | |
1948 | case DEFAULT_ARG: | |
1949 | case TEMPLATE_TEMPLATE_PARM: | |
1950 | case BOUND_TEMPLATE_TEMPLATE_PARM: | |
b8c6534b | 1951 | case UNBOUND_CLASS_TEMPLATE: |
25af8512 AO |
1952 | case TEMPLATE_PARM_INDEX: |
1953 | case TEMPLATE_TYPE_PARM: | |
1954 | case TYPENAME_TYPE: | |
1955 | case TYPEOF_TYPE: | |
5dae1114 | 1956 | case BASELINK: |
da1d7781 | 1957 | /* None of these have subtrees other than those already walked |
25af8512 AO |
1958 | above. */ |
1959 | *walk_subtrees_p = 0; | |
1960 | break; | |
1961 | ||
406d77a4 SB |
1962 | case TINST_LEVEL: |
1963 | WALK_SUBTREE (TINST_DECL (*tp)); | |
1964 | *walk_subtrees_p = 0; | |
1965 | break; | |
1966 | ||
25af8512 AO |
1967 | case PTRMEM_CST: |
1968 | WALK_SUBTREE (TREE_TYPE (*tp)); | |
1969 | *walk_subtrees_p = 0; | |
1970 | break; | |
1971 | ||
1972 | case TREE_LIST: | |
5dae1114 | 1973 | WALK_SUBTREE (TREE_PURPOSE (*tp)); |
25af8512 AO |
1974 | break; |
1975 | ||
1976 | case OVERLOAD: | |
1977 | WALK_SUBTREE (OVL_FUNCTION (*tp)); | |
1978 | WALK_SUBTREE (OVL_CHAIN (*tp)); | |
1979 | *walk_subtrees_p = 0; | |
1980 | break; | |
1981 | ||
1982 | case RECORD_TYPE: | |
1983 | if (TYPE_PTRMEMFUNC_P (*tp)) | |
1984 | WALK_SUBTREE (TYPE_PTRMEMFUNC_FN_TYPE (*tp)); | |
1985 | break; | |
1986 | ||
1987 | default: | |
6de9cd9a | 1988 | input_location = save_locus; |
350fae66 | 1989 | return NULL_TREE; |
25af8512 AO |
1990 | } |
1991 | ||
1992 | /* We didn't find what we were looking for. */ | |
6de9cd9a DN |
1993 | out: |
1994 | input_location = save_locus; | |
1995 | return result; | |
25af8512 AO |
1996 | |
1997 | #undef WALK_SUBTREE | |
1998 | } | |
1999 | ||
2000 | /* Decide whether there are language-specific reasons to not inline a | |
2001 | function as a tree. */ | |
2002 | ||
19551f29 | 2003 | int |
b57b79f7 | 2004 | cp_cannot_inline_tree_fn (tree* fnp) |
25af8512 AO |
2005 | { |
2006 | tree fn = *fnp; | |
2007 | ||
2008 | /* We can inline a template instantiation only if it's fully | |
2009 | instantiated. */ | |
2010 | if (DECL_TEMPLATE_INFO (fn) | |
2011 | && TI_PENDING_TEMPLATE_FLAG (DECL_TEMPLATE_INFO (fn))) | |
2012 | { | |
a5512a2f MM |
2013 | /* Don't instantiate functions that are not going to be |
2014 | inlined. */ | |
9f63daea | 2015 | if (!DECL_INLINE (DECL_TEMPLATE_RESULT |
a5512a2f MM |
2016 | (template_for_substitution (fn)))) |
2017 | return 1; | |
1a9861e6 | 2018 | |
415c974c | 2019 | fn = *fnp = instantiate_decl (fn, /*defer_ok=*/0, /*undefined_ok=*/0); |
1a9861e6 | 2020 | |
fd852454 RH |
2021 | if (TI_PENDING_TEMPLATE_FLAG (DECL_TEMPLATE_INFO (fn))) |
2022 | return 1; | |
25af8512 AO |
2023 | } |
2024 | ||
d58b7c2d MM |
2025 | if (flag_really_no_inline |
2026 | && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL) | |
2027 | return 1; | |
2028 | ||
8a3c9180 | 2029 | /* Don't auto-inline anything that might not be bound within |
6039a93d JH |
2030 | this unit of translation. |
2031 | Exclude comdat functions from this rule. While they can be bound | |
77077b39 | 2032 | to the other unit, they all must be the same. This is especially |
6039a93d JH |
2033 | important so templates can inline. */ |
2034 | if (!DECL_DECLARED_INLINE_P (fn) && !(*targetm.binds_local_p) (fn) | |
2035 | && !DECL_COMDAT (fn)) | |
8a3c9180 RH |
2036 | { |
2037 | DECL_UNINLINABLE (fn) = 1; | |
2038 | return 1; | |
2039 | } | |
2040 | ||
25af8512 AO |
2041 | if (varargs_function_p (fn)) |
2042 | { | |
2043 | DECL_UNINLINABLE (fn) = 1; | |
2044 | return 1; | |
2045 | } | |
2046 | ||
2047 | if (! function_attribute_inlinable_p (fn)) | |
2048 | { | |
2049 | DECL_UNINLINABLE (fn) = 1; | |
2050 | return 1; | |
2051 | } | |
2052 | ||
2053 | return 0; | |
2054 | } | |
2055 | ||
2056 | /* Add any pending functions other than the current function (already | |
2057 | handled by the caller), that thus cannot be inlined, to FNS_P, then | |
2058 | return the latest function added to the array, PREV_FN. */ | |
2059 | ||
19551f29 | 2060 | tree |
b57b79f7 | 2061 | cp_add_pending_fn_decls (void* fns_p, tree prev_fn) |
25af8512 AO |
2062 | { |
2063 | varray_type *fnsp = (varray_type *)fns_p; | |
2064 | struct saved_scope *s; | |
2065 | ||
2066 | for (s = scope_chain; s; s = s->prev) | |
2067 | if (s->function_decl && s->function_decl != prev_fn) | |
2068 | { | |
2069 | VARRAY_PUSH_TREE (*fnsp, s->function_decl); | |
2070 | prev_fn = s->function_decl; | |
2071 | } | |
2072 | ||
2073 | return prev_fn; | |
2074 | } | |
2075 | ||
2076 | /* Determine whether a tree node is an OVERLOAD node. Used to decide | |
2077 | whether to copy a node or to preserve its chain when inlining a | |
2078 | function. */ | |
2079 | ||
19551f29 | 2080 | int |
b57b79f7 | 2081 | cp_is_overload_p (tree t) |
25af8512 AO |
2082 | { |
2083 | return TREE_CODE (t) == OVERLOAD; | |
2084 | } | |
2085 | ||
2086 | /* Determine whether VAR is a declaration of an automatic variable in | |
2087 | function FN. */ | |
2088 | ||
19551f29 | 2089 | int |
b57b79f7 | 2090 | cp_auto_var_in_fn_p (tree var, tree fn) |
25af8512 AO |
2091 | { |
2092 | return (DECL_P (var) && DECL_CONTEXT (var) == fn | |
2093 | && nonstatic_local_decl_p (var)); | |
2094 | } | |
2095 | ||
18c6ada9 JH |
2096 | /* FN body has been duplicated. Update language specific fields. */ |
2097 | ||
2098 | void | |
9f63daea | 2099 | cp_update_decl_after_saving (tree fn, |
18c6ada9 JH |
2100 | void* decl_map_) |
2101 | { | |
2102 | splay_tree decl_map = (splay_tree)decl_map_; | |
2103 | tree nrv = DECL_SAVED_FUNCTION_DATA (fn)->x_return_value; | |
2104 | if (nrv) | |
2105 | { | |
2106 | DECL_SAVED_FUNCTION_DATA (fn)->x_return_value | |
2107 | = (tree) splay_tree_lookup (decl_map, (splay_tree_key) nrv)->value; | |
2108 | } | |
2109 | } | |
87e3dbc9 MM |
2110 | /* Initialize tree.c. */ |
2111 | ||
0a818f84 | 2112 | void |
b57b79f7 | 2113 | init_tree (void) |
0a818f84 | 2114 | { |
e2500fed | 2115 | list_hash_table = htab_create_ggc (31, list_hash, list_hash_eq, NULL); |
0a818f84 GRK |
2116 | } |
2117 | ||
872f37f9 | 2118 | /* Returns the kind of special function that DECL (a FUNCTION_DECL) |
50ad9642 MM |
2119 | is. Note that sfk_none is zero, so this function can be used as a |
2120 | predicate to test whether or not DECL is a special function. */ | |
872f37f9 MM |
2121 | |
2122 | special_function_kind | |
b57b79f7 | 2123 | special_function_p (tree decl) |
872f37f9 MM |
2124 | { |
2125 | /* Rather than doing all this stuff with magic names, we should | |
2126 | probably have a field of type `special_function_kind' in | |
2127 | DECL_LANG_SPECIFIC. */ | |
2128 | if (DECL_COPY_CONSTRUCTOR_P (decl)) | |
2129 | return sfk_copy_constructor; | |
2130 | if (DECL_CONSTRUCTOR_P (decl)) | |
2131 | return sfk_constructor; | |
596ea4e5 | 2132 | if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR) |
872f37f9 MM |
2133 | return sfk_assignment_operator; |
2134 | if (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl)) | |
2135 | return sfk_destructor; | |
2136 | if (DECL_COMPLETE_DESTRUCTOR_P (decl)) | |
2137 | return sfk_complete_destructor; | |
2138 | if (DECL_BASE_DESTRUCTOR_P (decl)) | |
2139 | return sfk_base_destructor; | |
2140 | if (DECL_DELETING_DESTRUCTOR_P (decl)) | |
2141 | return sfk_deleting_destructor; | |
2142 | if (DECL_CONV_FN_P (decl)) | |
2143 | return sfk_conversion; | |
2144 | ||
2145 | return sfk_none; | |
2146 | } | |
7b019c19 | 2147 | |
50ad9642 MM |
2148 | /* Returns true if and only if NODE is a name, i.e., a node created |
2149 | by the parser when processing an id-expression. */ | |
2150 | ||
2151 | bool | |
2152 | name_p (tree node) | |
2153 | { | |
2154 | if (TREE_CODE (node) == TEMPLATE_ID_EXPR) | |
2155 | node = TREE_OPERAND (node, 0); | |
2156 | return (/* An ordinary unqualified name. */ | |
2157 | TREE_CODE (node) == IDENTIFIER_NODE | |
2158 | /* A destructor name. */ | |
2159 | || TREE_CODE (node) == BIT_NOT_EXPR | |
2160 | /* A qualified name. */ | |
2161 | || TREE_CODE (node) == SCOPE_REF); | |
2162 | } | |
2163 | ||
838dfd8a | 2164 | /* Returns nonzero if TYPE is a character type, including wchar_t. */ |
7b019c19 MM |
2165 | |
2166 | int | |
b57b79f7 | 2167 | char_type_p (tree type) |
7b019c19 MM |
2168 | { |
2169 | return (same_type_p (type, char_type_node) | |
2170 | || same_type_p (type, unsigned_char_type_node) | |
2171 | || same_type_p (type, signed_char_type_node) | |
2172 | || same_type_p (type, wchar_type_node)); | |
2173 | } | |
ad50e811 MM |
2174 | |
2175 | /* Returns the kind of linkage associated with the indicated DECL. Th | |
2176 | value returned is as specified by the language standard; it is | |
2177 | independent of implementation details regarding template | |
2178 | instantiation, etc. For example, it is possible that a declaration | |
2179 | to which this function assigns external linkage would not show up | |
2180 | as a global symbol when you run `nm' on the resulting object file. */ | |
2181 | ||
2182 | linkage_kind | |
b57b79f7 | 2183 | decl_linkage (tree decl) |
ad50e811 MM |
2184 | { |
2185 | /* This function doesn't attempt to calculate the linkage from first | |
2186 | principles as given in [basic.link]. Instead, it makes use of | |
2187 | the fact that we have already set TREE_PUBLIC appropriately, and | |
2188 | then handles a few special cases. Ideally, we would calculate | |
2189 | linkage first, and then transform that into a concrete | |
2190 | implementation. */ | |
2191 | ||
2192 | /* Things that don't have names have no linkage. */ | |
2193 | if (!DECL_NAME (decl)) | |
2194 | return lk_none; | |
2195 | ||
2196 | /* Things that are TREE_PUBLIC have external linkage. */ | |
2197 | if (TREE_PUBLIC (decl)) | |
2198 | return lk_external; | |
2199 | ||
2200 | /* Some things that are not TREE_PUBLIC have external linkage, too. | |
2201 | For example, on targets that don't have weak symbols, we make all | |
2202 | template instantiations have internal linkage (in the object | |
2203 | file), but the symbols should still be treated as having external | |
2204 | linkage from the point of view of the language. */ | |
2205 | if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl)) | |
2206 | return lk_external; | |
2207 | ||
2208 | /* Things in local scope do not have linkage, if they don't have | |
2209 | TREE_PUBLIC set. */ | |
2210 | if (decl_function_context (decl)) | |
2211 | return lk_none; | |
2212 | ||
2213 | /* Everything else has internal linkage. */ | |
2214 | return lk_internal; | |
2215 | } | |
6f30f1f1 JM |
2216 | \f |
2217 | /* EXP is an expression that we want to pre-evaluate. Returns via INITP an | |
2218 | expression to perform the pre-evaluation, and returns directly an | |
2219 | expression to use the precalculated result. */ | |
2220 | ||
2221 | tree | |
b57b79f7 | 2222 | stabilize_expr (tree exp, tree* initp) |
6f30f1f1 JM |
2223 | { |
2224 | tree init_expr; | |
2225 | ||
2226 | if (!TREE_SIDE_EFFECTS (exp)) | |
2227 | { | |
6de9cd9a | 2228 | init_expr = NULL_TREE; |
6f30f1f1 JM |
2229 | } |
2230 | else if (!real_lvalue_p (exp) | |
2231 | || !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (exp))) | |
2232 | { | |
2233 | init_expr = get_target_expr (exp); | |
2234 | exp = TARGET_EXPR_SLOT (init_expr); | |
2235 | } | |
2236 | else | |
2237 | { | |
2238 | exp = build_unary_op (ADDR_EXPR, exp, 1); | |
2239 | init_expr = get_target_expr (exp); | |
2240 | exp = TARGET_EXPR_SLOT (init_expr); | |
2241 | exp = build_indirect_ref (exp, 0); | |
2242 | } | |
2243 | ||
2244 | *initp = init_expr; | |
2245 | return exp; | |
2246 | } | |
6de9cd9a | 2247 | |
40aac948 JM |
2248 | /* Add NEW, an expression whose value we don't care about, after the |
2249 | similar expression ORIG. */ | |
2250 | ||
2251 | tree | |
2252 | add_stmt_to_compound (tree orig, tree new) | |
2253 | { | |
2254 | if (!new || !TREE_SIDE_EFFECTS (new)) | |
2255 | return orig; | |
2256 | if (!orig || !TREE_SIDE_EFFECTS (orig)) | |
2257 | return new; | |
2258 | return build2 (COMPOUND_EXPR, void_type_node, orig, new); | |
2259 | } | |
2260 | ||
6de9cd9a DN |
2261 | /* Like stabilize_expr, but for a call whose args we want to |
2262 | pre-evaluate. */ | |
2263 | ||
2264 | void | |
2265 | stabilize_call (tree call, tree *initp) | |
2266 | { | |
2267 | tree inits = NULL_TREE; | |
2268 | tree t; | |
2269 | ||
2270 | if (call == error_mark_node) | |
2271 | return; | |
2272 | ||
315fb5db NS |
2273 | gcc_assert (TREE_CODE (call) == CALL_EXPR |
2274 | || TREE_CODE (call) == AGGR_INIT_EXPR); | |
6de9cd9a DN |
2275 | |
2276 | for (t = TREE_OPERAND (call, 1); t; t = TREE_CHAIN (t)) | |
2277 | if (TREE_SIDE_EFFECTS (TREE_VALUE (t))) | |
2278 | { | |
2279 | tree init; | |
2280 | TREE_VALUE (t) = stabilize_expr (TREE_VALUE (t), &init); | |
40aac948 | 2281 | inits = add_stmt_to_compound (inits, init); |
6de9cd9a DN |
2282 | } |
2283 | ||
2284 | *initp = inits; | |
2285 | } | |
2286 | ||
2287 | /* Like stabilize_expr, but for an initialization. If we are initializing | |
2288 | an object of class type, we don't want to introduce an extra temporary, | |
2289 | so we look past the TARGET_EXPR and stabilize the arguments of the call | |
2290 | instead. */ | |
2291 | ||
2292 | bool | |
2293 | stabilize_init (tree init, tree *initp) | |
2294 | { | |
2295 | tree t = init; | |
2296 | ||
2297 | if (t == error_mark_node) | |
2298 | return true; | |
2299 | ||
2300 | if (TREE_CODE (t) == INIT_EXPR | |
2301 | && TREE_CODE (TREE_OPERAND (t, 1)) != TARGET_EXPR) | |
2302 | TREE_OPERAND (t, 1) = stabilize_expr (TREE_OPERAND (t, 1), initp); | |
2303 | else | |
2304 | { | |
2305 | if (TREE_CODE (t) == INIT_EXPR) | |
2306 | t = TREE_OPERAND (t, 1); | |
2307 | if (TREE_CODE (t) == TARGET_EXPR) | |
2308 | t = TARGET_EXPR_INITIAL (t); | |
bcac21a0 JM |
2309 | if (TREE_CODE (t) == COMPOUND_EXPR) |
2310 | t = expr_last (t); | |
6de9cd9a DN |
2311 | if (TREE_CODE (t) == CONSTRUCTOR |
2312 | && CONSTRUCTOR_ELTS (t) == NULL_TREE) | |
2313 | { | |
2314 | /* Default-initialization. */ | |
2315 | *initp = NULL_TREE; | |
2316 | return true; | |
2317 | } | |
2318 | ||
2319 | /* If the initializer is a COND_EXPR, we can't preevaluate | |
2320 | anything. */ | |
2321 | if (TREE_CODE (t) == COND_EXPR) | |
2322 | return false; | |
2323 | ||
2324 | stabilize_call (t, initp); | |
2325 | } | |
2326 | ||
2327 | return true; | |
2328 | } | |
2329 | ||
e2500fed GK |
2330 | \f |
2331 | #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007) | |
2332 | /* Complain that some language-specific thing hanging off a tree | |
2333 | node has been accessed improperly. */ | |
2334 | ||
2335 | void | |
b57b79f7 | 2336 | lang_check_failed (const char* file, int line, const char* function) |
e2500fed GK |
2337 | { |
2338 | internal_error ("lang_* check: failed in %s, at %s:%d", | |
2339 | function, trim_filename (file), line); | |
2340 | } | |
2341 | #endif /* ENABLE_TREE_CHECKING */ | |
2342 | ||
2343 | #include "gt-cp-tree.h" |