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8d08fdba | 1 | /* Functions related to building classes and their related objects. |
956d6950 | 2 | Copyright (C) 1987, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc. |
8d08fdba MS |
3 | Contributed by Michael Tiemann (tiemann@cygnus.com) |
4 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
e9fa0c7c RK |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
8d08fdba MS |
21 | |
22 | ||
e92cc029 | 23 | /* High-level class interface. */ |
8d08fdba MS |
24 | |
25 | #include "config.h" | |
8d052bc7 | 26 | #include "system.h" |
e7a587ef | 27 | #include "tree.h" |
8d08fdba MS |
28 | #include "cp-tree.h" |
29 | #include "flags.h" | |
28cbf42c | 30 | #include "rtl.h" |
e8abc66f | 31 | #include "output.h" |
54f92bfb | 32 | #include "toplev.h" |
8d08fdba MS |
33 | |
34 | #include "obstack.h" | |
35 | #define obstack_chunk_alloc xmalloc | |
36 | #define obstack_chunk_free free | |
37 | ||
38 | extern struct obstack permanent_obstack; | |
39 | ||
40 | /* This is how we tell when two virtual member functions are really the | |
e92cc029 | 41 | same. */ |
8d08fdba MS |
42 | #define SAME_FN(FN1DECL, FN2DECL) (DECL_ASSEMBLER_NAME (FN1DECL) == DECL_ASSEMBLER_NAME (FN2DECL)) |
43 | ||
44 | extern void set_class_shadows PROTO ((tree)); | |
45 | ||
46 | /* Way of stacking class types. */ | |
47 | static tree *current_class_base, *current_class_stack; | |
48 | static int current_class_stacksize; | |
49 | int current_class_depth; | |
50 | ||
51 | struct class_level | |
52 | { | |
53 | /* The previous class level. */ | |
54 | struct class_level *level_chain; | |
55 | ||
56 | /* The class instance variable, as a PARM_DECL. */ | |
57 | tree decl; | |
58 | /* The class instance variable, as an object. */ | |
59 | tree object; | |
60 | /* The virtual function table pointer | |
61 | for the class instance variable. */ | |
62 | tree vtable_decl; | |
63 | ||
64 | /* Name of the current class. */ | |
65 | tree name; | |
66 | /* Type of the current class. */ | |
67 | tree type; | |
68 | ||
69 | /* Flags for this class level. */ | |
70 | int this_is_variable; | |
71 | int memoized_lookups; | |
72 | int save_memoized; | |
73 | int unused; | |
74 | }; | |
75 | ||
956d6950 | 76 | /* The current_class_ptr is the pointer to the current class. |
4ac14744 MS |
77 | current_class_ref is the actual current class. */ |
78 | tree current_class_ptr, current_class_ref; | |
8d08fdba MS |
79 | |
80 | /* The following two can be derived from the previous one */ | |
81 | tree current_class_name; /* IDENTIFIER_NODE: name of current class */ | |
82 | tree current_class_type; /* _TYPE: the type of the current class */ | |
83 | tree previous_class_type; /* _TYPE: the previous type that was a class */ | |
84 | tree previous_class_values; /* TREE_LIST: copy of the class_shadowed list | |
85 | when leaving an outermost class scope. */ | |
49c249e1 JM |
86 | |
87 | struct base_info; | |
88 | ||
8d08fdba | 89 | static tree get_vfield_name PROTO((tree)); |
49c249e1 JM |
90 | static void finish_struct_anon PROTO((tree)); |
91 | static tree build_vbase_pointer PROTO((tree, tree)); | |
92 | static int complete_type_p PROTO((tree)); | |
93 | static int typecode_p PROTO((tree, enum tree_code)); | |
94 | static tree build_vtable_entry PROTO((tree, tree)); | |
95 | static tree get_vtable_name PROTO((tree)); | |
96 | static tree get_derived_offset PROTO((tree, tree)); | |
97 | static tree get_basefndecls PROTO((tree, tree)); | |
98 | static void set_rtti_entry PROTO((tree, tree, tree)); | |
99 | static tree build_vtable PROTO((tree, tree)); | |
49c249e1 JM |
100 | static void prepare_fresh_vtable PROTO((tree, tree)); |
101 | static void fixup_vtable_deltas1 PROTO((tree, tree)); | |
102 | static void fixup_vtable_deltas PROTO((tree, int, tree)); | |
103 | static void grow_method PROTO((tree, tree *)); | |
104 | static void finish_vtbls PROTO((tree, int, tree)); | |
105 | static void modify_vtable_entry PROTO((tree, tree, tree)); | |
106 | static tree get_vtable_entry_n PROTO((tree, unsigned HOST_WIDE_INT)); | |
aa598818 | 107 | static void add_virtual_function PROTO((tree *, tree *, int *, tree, tree)); |
49c249e1 JM |
108 | static tree delete_duplicate_fields_1 PROTO((tree, tree)); |
109 | static void delete_duplicate_fields PROTO((tree)); | |
110 | static void finish_struct_bits PROTO((tree, int)); | |
111 | static int alter_access PROTO((tree, tree, tree)); | |
112 | static int overrides PROTO((tree, tree)); | |
113 | static int strictly_overrides PROTO((tree, tree)); | |
114 | static void merge_overrides PROTO((tree, tree, int, tree)); | |
115 | static void override_one_vtable PROTO((tree, tree, tree)); | |
116 | static void mark_overriders PROTO((tree, tree)); | |
117 | static void check_for_override PROTO((tree, tree)); | |
118 | static tree maybe_fixup_vptrs PROTO((tree, tree, tree)); | |
119 | static tree get_class_offset_1 PROTO((tree, tree, tree, tree, tree)); | |
120 | static tree get_class_offset PROTO((tree, tree, tree, tree)); | |
121 | static void modify_one_vtable PROTO((tree, tree, tree, tree)); | |
122 | static void modify_all_vtables PROTO((tree, tree, tree)); | |
123 | static void modify_all_direct_vtables PROTO((tree, int, tree, tree, | |
124 | tree)); | |
125 | static void modify_all_indirect_vtables PROTO((tree, int, int, tree, | |
126 | tree, tree)); | |
127 | static void build_class_init_list PROTO((tree)); | |
9a71c18b | 128 | static int finish_base_struct PROTO((tree, struct base_info *)); |
8d08fdba MS |
129 | |
130 | /* Way of stacking language names. */ | |
131 | tree *current_lang_base, *current_lang_stack; | |
51c184be | 132 | int current_lang_stacksize; |
8d08fdba MS |
133 | |
134 | /* Names of languages we recognize. */ | |
a1774733 | 135 | tree lang_name_c, lang_name_cplusplus, lang_name_java; |
8d08fdba MS |
136 | tree current_lang_name; |
137 | ||
138 | /* When layout out an aggregate type, the size of the | |
139 | basetypes (virtual and non-virtual) is passed to layout_record | |
140 | via this node. */ | |
141 | static tree base_layout_decl; | |
142 | ||
be99da77 MS |
143 | /* Constants used for access control. */ |
144 | tree access_default_node; /* 0 */ | |
145 | tree access_public_node; /* 1 */ | |
146 | tree access_protected_node; /* 2 */ | |
147 | tree access_private_node; /* 3 */ | |
148 | tree access_default_virtual_node; /* 4 */ | |
149 | tree access_public_virtual_node; /* 5 */ | |
d8b55a76 JM |
150 | tree access_protected_virtual_node; /* 6 */ |
151 | tree access_private_virtual_node; /* 7 */ | |
be99da77 | 152 | |
51c184be | 153 | /* Variables shared between class.c and call.c. */ |
8d08fdba | 154 | |
5566b478 | 155 | #ifdef GATHER_STATISTICS |
8d08fdba MS |
156 | int n_vtables = 0; |
157 | int n_vtable_entries = 0; | |
158 | int n_vtable_searches = 0; | |
159 | int n_vtable_elems = 0; | |
160 | int n_convert_harshness = 0; | |
161 | int n_compute_conversion_costs = 0; | |
162 | int n_build_method_call = 0; | |
163 | int n_inner_fields_searched = 0; | |
5566b478 | 164 | #endif |
8d08fdba MS |
165 | |
166 | /* Virtual baseclass things. */ | |
e92cc029 | 167 | |
bd6dd845 | 168 | static tree |
8d08fdba MS |
169 | build_vbase_pointer (exp, type) |
170 | tree exp, type; | |
171 | { | |
172 | char *name; | |
173 | ||
174 | name = (char *) alloca (TYPE_NAME_LENGTH (type) + sizeof (VBASE_NAME) + 1); | |
175 | sprintf (name, VBASE_NAME_FORMAT, TYPE_NAME_STRING (type)); | |
4dabb379 | 176 | return build_component_ref (exp, get_identifier (name), NULL_TREE, 0); |
8d08fdba MS |
177 | } |
178 | ||
179 | /* Is the type of the EXPR, the complete type of the object? | |
e92cc029 MS |
180 | If we are going to be wrong, we must be conservative, and return 0. */ |
181 | ||
bd6dd845 | 182 | static int |
8d08fdba MS |
183 | complete_type_p (expr) |
184 | tree expr; | |
185 | { | |
186 | tree type = TYPE_MAIN_VARIANT (TREE_TYPE (expr)); | |
187 | while (1) | |
188 | { | |
189 | switch (TREE_CODE (expr)) | |
190 | { | |
191 | case SAVE_EXPR: | |
192 | case INDIRECT_REF: | |
193 | case ADDR_EXPR: | |
194 | case NOP_EXPR: | |
195 | case CONVERT_EXPR: | |
196 | expr = TREE_OPERAND (expr, 0); | |
197 | continue; | |
198 | ||
199 | case CALL_EXPR: | |
200 | if (! TREE_HAS_CONSTRUCTOR (expr)) | |
201 | break; | |
e92cc029 | 202 | /* fall through... */ |
8d08fdba MS |
203 | case VAR_DECL: |
204 | case FIELD_DECL: | |
205 | if (TREE_CODE (TREE_TYPE (expr)) == ARRAY_TYPE | |
206 | && IS_AGGR_TYPE (TREE_TYPE (TREE_TYPE (expr))) | |
207 | && TYPE_MAIN_VARIANT (TREE_TYPE (expr)) == type) | |
208 | return 1; | |
e92cc029 | 209 | /* fall through... */ |
8d08fdba MS |
210 | case TARGET_EXPR: |
211 | case PARM_DECL: | |
212 | if (IS_AGGR_TYPE (TREE_TYPE (expr)) | |
213 | && TYPE_MAIN_VARIANT (TREE_TYPE (expr)) == type) | |
214 | return 1; | |
e92cc029 | 215 | /* fall through... */ |
8d08fdba MS |
216 | case PLUS_EXPR: |
217 | default: | |
218 | break; | |
219 | } | |
220 | break; | |
221 | } | |
222 | return 0; | |
223 | } | |
224 | ||
225 | /* Build multi-level access to EXPR using hierarchy path PATH. | |
226 | CODE is PLUS_EXPR if we are going with the grain, | |
227 | and MINUS_EXPR if we are not (in which case, we cannot traverse | |
228 | virtual baseclass links). | |
229 | ||
230 | TYPE is the type we want this path to have on exit. | |
231 | ||
232 | ALIAS_THIS is non-zero if EXPR in an expression involving `this'. */ | |
e92cc029 | 233 | |
8d08fdba MS |
234 | tree |
235 | build_vbase_path (code, type, expr, path, alias_this) | |
236 | enum tree_code code; | |
237 | tree type, expr, path; | |
238 | int alias_this; | |
239 | { | |
240 | register int changed = 0; | |
241 | tree last = NULL_TREE, last_virtual = NULL_TREE; | |
242 | int nonnull = 0; | |
6633d636 | 243 | int fixed_type_p; |
8d08fdba MS |
244 | tree null_expr = 0, nonnull_expr; |
245 | tree basetype; | |
246 | tree offset = integer_zero_node; | |
247 | ||
6633d636 MS |
248 | if (BINFO_INHERITANCE_CHAIN (path) == NULL_TREE) |
249 | return build1 (NOP_EXPR, type, expr); | |
250 | ||
f30432d7 MS |
251 | if (nonnull == 0 && (alias_this && flag_this_is_variable <= 0)) |
252 | nonnull = 1; | |
253 | ||
6633d636 | 254 | #if 0 |
8d08fdba MS |
255 | /* We need additional logic to convert back to the unconverted type |
256 | (the static type of the complete object), and then convert back | |
257 | to the type we want. Until that is done, or until we can | |
258 | recognize when that is, we cannot do the short cut logic. (mrs) */ | |
6633d636 MS |
259 | fixed_type_p = resolves_to_fixed_type_p (expr, &nonnull); |
260 | #else | |
ddd5a7c1 | 261 | /* Do this, until we can undo any previous conversions. See net35.C |
e92cc029 | 262 | for a testcase. */ |
8d08fdba | 263 | fixed_type_p = complete_type_p (expr); |
6633d636 | 264 | #endif |
8d08fdba MS |
265 | |
266 | if (!fixed_type_p && TREE_SIDE_EFFECTS (expr)) | |
267 | expr = save_expr (expr); | |
268 | nonnull_expr = expr; | |
269 | ||
270 | if (BINFO_INHERITANCE_CHAIN (path)) | |
271 | { | |
272 | tree reverse_path = NULL_TREE; | |
273 | ||
e66d884e | 274 | push_expression_obstack (); |
8d08fdba MS |
275 | while (path) |
276 | { | |
277 | tree r = copy_node (path); | |
278 | BINFO_INHERITANCE_CHAIN (r) = reverse_path; | |
279 | reverse_path = r; | |
280 | path = BINFO_INHERITANCE_CHAIN (path); | |
281 | } | |
282 | path = reverse_path; | |
e66d884e | 283 | pop_obstacks (); |
8d08fdba MS |
284 | } |
285 | ||
286 | basetype = BINFO_TYPE (path); | |
287 | ||
288 | while (path) | |
289 | { | |
290 | if (TREE_VIA_VIRTUAL (path)) | |
291 | { | |
292 | last_virtual = BINFO_TYPE (path); | |
293 | if (code == PLUS_EXPR) | |
294 | { | |
295 | changed = ! fixed_type_p; | |
296 | ||
297 | if (changed) | |
298 | { | |
8d08fdba MS |
299 | tree ind; |
300 | ||
301 | /* We already check for ambiguous things in the caller, just | |
e92cc029 | 302 | find a path. */ |
8d08fdba MS |
303 | if (last) |
304 | { | |
305 | tree binfo = get_binfo (last, TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (nonnull_expr))), 0); | |
306 | nonnull_expr = convert_pointer_to_real (binfo, nonnull_expr); | |
307 | } | |
308 | ind = build_indirect_ref (nonnull_expr, NULL_PTR); | |
309 | nonnull_expr = build_vbase_pointer (ind, last_virtual); | |
a9aedbc2 MS |
310 | if (nonnull == 0 |
311 | && (TREE_CODE (type) == POINTER_TYPE | |
312 | || !flag_assume_nonnull_objects) | |
8d08fdba MS |
313 | && null_expr == NULL_TREE) |
314 | { | |
f30432d7 MS |
315 | null_expr = build1 (NOP_EXPR, build_pointer_type (last_virtual), integer_zero_node); |
316 | expr = build (COND_EXPR, build_pointer_type (last_virtual), | |
b7484fbe | 317 | build (EQ_EXPR, boolean_type_node, expr, |
8d08fdba MS |
318 | integer_zero_node), |
319 | null_expr, nonnull_expr); | |
320 | } | |
321 | } | |
322 | /* else we'll figure out the offset below. */ | |
323 | ||
324 | /* Happens in the case of parse errors. */ | |
325 | if (nonnull_expr == error_mark_node) | |
326 | return error_mark_node; | |
327 | } | |
328 | else | |
329 | { | |
330 | cp_error ("cannot cast up from virtual baseclass `%T'", | |
331 | last_virtual); | |
332 | return error_mark_node; | |
333 | } | |
334 | } | |
335 | last = path; | |
336 | path = BINFO_INHERITANCE_CHAIN (path); | |
337 | } | |
338 | /* LAST is now the last basetype assoc on the path. */ | |
339 | ||
340 | /* A pointer to a virtual base member of a non-null object | |
341 | is non-null. Therefore, we only need to test for zeroness once. | |
342 | Make EXPR the canonical expression to deal with here. */ | |
343 | if (null_expr) | |
344 | { | |
345 | TREE_OPERAND (expr, 2) = nonnull_expr; | |
b9ddcfac JM |
346 | TREE_TYPE (expr) = TREE_TYPE (TREE_OPERAND (expr, 1)) |
347 | = TREE_TYPE (nonnull_expr); | |
8d08fdba MS |
348 | } |
349 | else | |
350 | expr = nonnull_expr; | |
351 | ||
352 | /* If we go through any virtual base pointers, make sure that | |
353 | casts to BASETYPE from the last virtual base class use | |
354 | the right value for BASETYPE. */ | |
355 | if (changed) | |
356 | { | |
357 | tree intype = TREE_TYPE (TREE_TYPE (expr)); | |
f30432d7 | 358 | if (TYPE_MAIN_VARIANT (intype) != BINFO_TYPE (last)) |
8d08fdba MS |
359 | { |
360 | tree binfo = get_binfo (last, TYPE_MAIN_VARIANT (intype), 0); | |
8d08fdba MS |
361 | offset = BINFO_OFFSET (binfo); |
362 | } | |
363 | } | |
364 | else | |
365 | { | |
366 | if (last_virtual) | |
367 | { | |
368 | offset = BINFO_OFFSET (binfo_member (last_virtual, | |
369 | CLASSTYPE_VBASECLASSES (basetype))); | |
370 | offset = size_binop (PLUS_EXPR, offset, BINFO_OFFSET (last)); | |
371 | } | |
372 | else | |
373 | offset = BINFO_OFFSET (last); | |
374 | } | |
375 | ||
376 | if (TREE_INT_CST_LOW (offset)) | |
377 | { | |
59be85d7 | 378 | /* Bash types to make the backend happy. */ |
37c46b43 MS |
379 | offset = cp_convert (type, offset); |
380 | #if 0 | |
381 | /* This shouldn't be necessary. (mrs) */ | |
59be85d7 | 382 | expr = build1 (NOP_EXPR, type, expr); |
37c46b43 | 383 | #endif |
59be85d7 | 384 | |
8d08fdba MS |
385 | /* For multiple inheritance: if `this' can be set by any |
386 | function, then it could be 0 on entry to any function. | |
387 | Preserve such zeroness here. Otherwise, only in the | |
388 | case of constructors need we worry, and in those cases, | |
db6f8fbe | 389 | it will be zero, or initialized to some valid value to |
8d08fdba | 390 | which we may add. */ |
f30432d7 | 391 | if (nonnull == 0) |
8d08fdba MS |
392 | { |
393 | if (null_expr) | |
394 | TREE_TYPE (null_expr) = type; | |
395 | else | |
396 | null_expr = build1 (NOP_EXPR, type, integer_zero_node); | |
397 | if (TREE_SIDE_EFFECTS (expr)) | |
398 | expr = save_expr (expr); | |
399 | ||
400 | return build (COND_EXPR, type, | |
b7484fbe | 401 | build (EQ_EXPR, boolean_type_node, expr, integer_zero_node), |
8d08fdba MS |
402 | null_expr, |
403 | build (code, type, expr, offset)); | |
404 | } | |
405 | else return build (code, type, expr, offset); | |
406 | } | |
407 | ||
408 | /* Cannot change the TREE_TYPE of a NOP_EXPR here, since it may | |
409 | be used multiple times in initialization of multiple inheritance. */ | |
410 | if (null_expr) | |
411 | { | |
412 | TREE_TYPE (expr) = type; | |
413 | return expr; | |
414 | } | |
415 | else | |
416 | return build1 (NOP_EXPR, type, expr); | |
417 | } | |
418 | ||
419 | /* Virtual function things. */ | |
420 | ||
8d08fdba MS |
421 | /* Build an entry in the virtual function table. |
422 | DELTA is the offset for the `this' pointer. | |
423 | PFN is an ADDR_EXPR containing a pointer to the virtual function. | |
424 | Note that the index (DELTA2) in the virtual function table | |
425 | is always 0. */ | |
e92cc029 | 426 | |
bd6dd845 | 427 | static tree |
8d08fdba MS |
428 | build_vtable_entry (delta, pfn) |
429 | tree delta, pfn; | |
430 | { | |
8926095f MS |
431 | if (flag_vtable_thunks) |
432 | { | |
433 | HOST_WIDE_INT idelta = TREE_INT_CST_LOW (delta); | |
46b02c6d | 434 | if (idelta && ! DECL_ABSTRACT_VIRTUAL_P (TREE_OPERAND (pfn, 0))) |
8926095f | 435 | { |
700f8a87 | 436 | pfn = build1 (ADDR_EXPR, vtable_entry_type, |
8926095f MS |
437 | make_thunk (pfn, idelta)); |
438 | TREE_READONLY (pfn) = 1; | |
439 | TREE_CONSTANT (pfn) = 1; | |
440 | } | |
441 | #ifdef GATHER_STATISTICS | |
442 | n_vtable_entries += 1; | |
443 | #endif | |
444 | return pfn; | |
445 | } | |
446 | else | |
447 | { | |
448 | extern int flag_huge_objects; | |
e66d884e JM |
449 | tree elems = expr_tree_cons (NULL_TREE, delta, |
450 | expr_tree_cons (NULL_TREE, integer_zero_node, | |
451 | build_expr_list (NULL_TREE, pfn))); | |
8926095f MS |
452 | tree entry = build (CONSTRUCTOR, vtable_entry_type, NULL_TREE, elems); |
453 | ||
454 | /* DELTA is constructed by `size_int', which means it may be an | |
455 | unsigned quantity on some platforms. Therefore, we cannot use | |
456 | `int_fits_type_p', because when DELTA is really negative, | |
457 | `force_fit_type' will make it look like a very large number. */ | |
458 | ||
459 | if ((TREE_INT_CST_LOW (TYPE_MAX_VALUE (delta_type_node)) | |
460 | < TREE_INT_CST_LOW (delta)) | |
461 | || (TREE_INT_CST_LOW (delta) | |
462 | < TREE_INT_CST_LOW (TYPE_MIN_VALUE (delta_type_node)))) | |
a703fb38 KG |
463 | { |
464 | if (flag_huge_objects) | |
465 | sorry ("object size exceeds built-in limit for virtual function table implementation"); | |
466 | else | |
467 | sorry ("object size exceeds normal limit for virtual function table implementation, recompile all source and use -fhuge-objects"); | |
468 | } | |
469 | ||
8926095f MS |
470 | TREE_CONSTANT (entry) = 1; |
471 | TREE_STATIC (entry) = 1; | |
472 | TREE_READONLY (entry) = 1; | |
8d08fdba MS |
473 | |
474 | #ifdef GATHER_STATISTICS | |
8926095f | 475 | n_vtable_entries += 1; |
8d08fdba MS |
476 | #endif |
477 | ||
8926095f MS |
478 | return entry; |
479 | } | |
8d08fdba MS |
480 | } |
481 | ||
482 | /* Given an object INSTANCE, return an expression which yields the | |
6b5fbb55 MS |
483 | virtual function vtable element corresponding to INDEX. There are |
484 | many special cases for INSTANCE which we take care of here, mainly | |
485 | to avoid creating extra tree nodes when we don't have to. */ | |
e92cc029 | 486 | |
8d08fdba | 487 | tree |
6b5fbb55 MS |
488 | build_vtbl_ref (instance, idx) |
489 | tree instance, idx; | |
8d08fdba | 490 | { |
8d08fdba MS |
491 | tree vtbl, aref; |
492 | tree basetype = TREE_TYPE (instance); | |
493 | ||
494 | if (TREE_CODE (basetype) == REFERENCE_TYPE) | |
495 | basetype = TREE_TYPE (basetype); | |
496 | ||
4ac14744 | 497 | if (instance == current_class_ref) |
8bf41929 RK |
498 | vtbl = build_indirect_ref (build_vfield_ref (instance, basetype), |
499 | NULL_PTR); | |
8d08fdba MS |
500 | else |
501 | { | |
502 | if (optimize) | |
503 | { | |
504 | /* Try to figure out what a reference refers to, and | |
505 | access its virtual function table directly. */ | |
506 | tree ref = NULL_TREE; | |
507 | ||
508 | if (TREE_CODE (instance) == INDIRECT_REF | |
509 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (instance, 0))) == REFERENCE_TYPE) | |
510 | ref = TREE_OPERAND (instance, 0); | |
511 | else if (TREE_CODE (TREE_TYPE (instance)) == REFERENCE_TYPE) | |
512 | ref = instance; | |
513 | ||
514 | if (ref && TREE_CODE (ref) == VAR_DECL | |
515 | && DECL_INITIAL (ref)) | |
516 | { | |
517 | tree init = DECL_INITIAL (ref); | |
518 | ||
519 | while (TREE_CODE (init) == NOP_EXPR | |
520 | || TREE_CODE (init) == NON_LVALUE_EXPR) | |
521 | init = TREE_OPERAND (init, 0); | |
522 | if (TREE_CODE (init) == ADDR_EXPR) | |
523 | { | |
524 | init = TREE_OPERAND (init, 0); | |
525 | if (IS_AGGR_TYPE (TREE_TYPE (init)) | |
526 | && (TREE_CODE (init) == PARM_DECL | |
527 | || TREE_CODE (init) == VAR_DECL)) | |
528 | instance = init; | |
529 | } | |
530 | } | |
531 | } | |
532 | ||
533 | if (IS_AGGR_TYPE (TREE_TYPE (instance)) | |
8d08fdba MS |
534 | && (TREE_CODE (instance) == RESULT_DECL |
535 | || TREE_CODE (instance) == PARM_DECL | |
536 | || TREE_CODE (instance) == VAR_DECL)) | |
537 | vtbl = TYPE_BINFO_VTABLE (basetype); | |
538 | else | |
539 | vtbl = build_indirect_ref (build_vfield_ref (instance, basetype), | |
540 | NULL_PTR); | |
541 | } | |
e3417fcd | 542 | assemble_external (vtbl); |
8d08fdba MS |
543 | aref = build_array_ref (vtbl, idx); |
544 | ||
6b5fbb55 MS |
545 | return aref; |
546 | } | |
547 | ||
548 | /* Given an object INSTANCE, return an expression which yields the | |
549 | virtual function corresponding to INDEX. There are many special | |
550 | cases for INSTANCE which we take care of here, mainly to avoid | |
551 | creating extra tree nodes when we don't have to. */ | |
e92cc029 | 552 | |
6b5fbb55 MS |
553 | tree |
554 | build_vfn_ref (ptr_to_instptr, instance, idx) | |
555 | tree *ptr_to_instptr, instance; | |
556 | tree idx; | |
557 | { | |
558 | tree aref = build_vtbl_ref (instance, idx); | |
8d08fdba | 559 | |
6b5fbb55 MS |
560 | /* When using thunks, there is no extra delta, and we get the pfn |
561 | directly. */ | |
8926095f MS |
562 | if (flag_vtable_thunks) |
563 | return aref; | |
6b5fbb55 MS |
564 | |
565 | if (ptr_to_instptr) | |
8926095f | 566 | { |
6b5fbb55 MS |
567 | /* Save the intermediate result in a SAVE_EXPR so we don't have to |
568 | compute each component of the virtual function pointer twice. */ | |
569 | if (TREE_CODE (aref) == INDIRECT_REF) | |
570 | TREE_OPERAND (aref, 0) = save_expr (TREE_OPERAND (aref, 0)); | |
571 | ||
572 | *ptr_to_instptr | |
573 | = build (PLUS_EXPR, TREE_TYPE (*ptr_to_instptr), | |
574 | *ptr_to_instptr, | |
37c46b43 MS |
575 | cp_convert (ptrdiff_type_node, |
576 | build_component_ref (aref, delta_identifier, NULL_TREE, 0))); | |
8926095f | 577 | } |
6b5fbb55 MS |
578 | |
579 | return build_component_ref (aref, pfn_identifier, NULL_TREE, 0); | |
8d08fdba MS |
580 | } |
581 | ||
8d08fdba MS |
582 | /* Return the name of the virtual function table (as an IDENTIFIER_NODE) |
583 | for the given TYPE. */ | |
e92cc029 | 584 | |
8d08fdba MS |
585 | static tree |
586 | get_vtable_name (type) | |
587 | tree type; | |
588 | { | |
589 | tree type_id = build_typename_overload (type); | |
2636fde4 JM |
590 | char *buf = (char *) alloca (strlen (VTABLE_NAME_FORMAT) |
591 | + IDENTIFIER_LENGTH (type_id) + 2); | |
8d08fdba MS |
592 | char *ptr = IDENTIFIER_POINTER (type_id); |
593 | int i; | |
594 | for (i = 0; ptr[i] == OPERATOR_TYPENAME_FORMAT[i]; i++) ; | |
595 | #if 0 | |
596 | /* We don't take off the numbers; prepare_fresh_vtable uses the | |
597 | DECL_ASSEMBLER_NAME for the type, which includes the number | |
598 | in `3foo'. If we were to pull them off here, we'd end up with | |
599 | something like `_vt.foo.3bar', instead of a uniform definition. */ | |
600 | while (ptr[i] >= '0' && ptr[i] <= '9') | |
601 | i += 1; | |
602 | #endif | |
603 | sprintf (buf, VTABLE_NAME_FORMAT, ptr+i); | |
604 | return get_identifier (buf); | |
605 | } | |
606 | ||
6b5fbb55 | 607 | /* Return the offset to the main vtable for a given base BINFO. */ |
e92cc029 | 608 | |
6b5fbb55 MS |
609 | tree |
610 | get_vfield_offset (binfo) | |
611 | tree binfo; | |
612 | { | |
f5426d1e R |
613 | tree tmp |
614 | = size_binop (FLOOR_DIV_EXPR, | |
615 | DECL_FIELD_BITPOS (CLASSTYPE_VFIELD (BINFO_TYPE (binfo))), | |
616 | size_int (BITS_PER_UNIT)); | |
617 | tmp = convert (sizetype, tmp); | |
618 | return size_binop (PLUS_EXPR, tmp, BINFO_OFFSET (binfo)); | |
6b5fbb55 MS |
619 | } |
620 | ||
621 | /* Get the offset to the start of the original binfo that we derived | |
622 | this binfo from. If we find TYPE first, return the offset only | |
623 | that far. The shortened search is useful because the this pointer | |
624 | on method calling is expected to point to a DECL_CONTEXT (fndecl) | |
625 | object, and not a baseclass of it. */ | |
e92cc029 | 626 | |
6b5fbb55 MS |
627 | static tree |
628 | get_derived_offset (binfo, type) | |
629 | tree binfo, type; | |
630 | { | |
631 | tree offset1 = get_vfield_offset (TYPE_BINFO (BINFO_TYPE (binfo))); | |
632 | tree offset2; | |
633 | int i; | |
634 | while (BINFO_BASETYPES (binfo) | |
635 | && (i=CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (binfo))) != -1) | |
636 | { | |
637 | tree binfos = BINFO_BASETYPES (binfo); | |
638 | if (BINFO_TYPE (binfo) == type) | |
639 | break; | |
640 | binfo = TREE_VEC_ELT (binfos, i); | |
641 | } | |
642 | offset2 = get_vfield_offset (TYPE_BINFO (BINFO_TYPE (binfo))); | |
643 | return size_binop (MINUS_EXPR, offset1, offset2); | |
644 | } | |
645 | ||
646 | /* Update the rtti info for this class. */ | |
e92cc029 | 647 | |
6b5fbb55 MS |
648 | static void |
649 | set_rtti_entry (virtuals, offset, type) | |
650 | tree virtuals, offset, type; | |
651 | { | |
652 | tree vfn; | |
653 | ||
654 | if (flag_rtti) | |
655 | vfn = build1 (ADDR_EXPR, vfunc_ptr_type_node, get_tinfo_fn (type)); | |
656 | else | |
46b02c6d | 657 | vfn = build1 (NOP_EXPR, vfunc_ptr_type_node, size_zero_node); |
6b5fbb55 MS |
658 | TREE_CONSTANT (vfn) = 1; |
659 | ||
660 | if (! flag_vtable_thunks) | |
661 | TREE_VALUE (virtuals) = build_vtable_entry (offset, vfn); | |
662 | else | |
663 | { | |
664 | tree voff = build1 (NOP_EXPR, vfunc_ptr_type_node, offset); | |
665 | TREE_CONSTANT (voff) = 1; | |
666 | ||
46b02c6d | 667 | TREE_VALUE (virtuals) = build_vtable_entry (size_zero_node, voff); |
6b5fbb55 MS |
668 | |
669 | /* The second slot is for the tdesc pointer when thunks are used. */ | |
670 | TREE_VALUE (TREE_CHAIN (virtuals)) | |
46b02c6d | 671 | = build_vtable_entry (size_zero_node, vfn); |
6b5fbb55 MS |
672 | } |
673 | } | |
674 | ||
8d08fdba MS |
675 | /* Build a virtual function for type TYPE. |
676 | If BINFO is non-NULL, build the vtable starting with the initial | |
677 | approximation that it is the same as the one which is the head of | |
678 | the association list. */ | |
e92cc029 | 679 | |
8d08fdba MS |
680 | static tree |
681 | build_vtable (binfo, type) | |
682 | tree binfo, type; | |
683 | { | |
684 | tree name = get_vtable_name (type); | |
685 | tree virtuals, decl; | |
686 | ||
687 | if (binfo) | |
688 | { | |
6b5fbb55 MS |
689 | tree offset; |
690 | ||
8d08fdba MS |
691 | virtuals = copy_list (BINFO_VIRTUALS (binfo)); |
692 | decl = build_decl (VAR_DECL, name, TREE_TYPE (BINFO_VTABLE (binfo))); | |
6b5fbb55 MS |
693 | |
694 | /* Now do rtti stuff. */ | |
695 | offset = get_derived_offset (TYPE_BINFO (type), NULL_TREE); | |
46b02c6d | 696 | offset = size_binop (MINUS_EXPR, size_zero_node, offset); |
6b5fbb55 | 697 | set_rtti_entry (virtuals, offset, type); |
8d08fdba MS |
698 | } |
699 | else | |
700 | { | |
701 | virtuals = NULL_TREE; | |
702 | decl = build_decl (VAR_DECL, name, void_type_node); | |
703 | } | |
704 | ||
705 | #ifdef GATHER_STATISTICS | |
706 | n_vtables += 1; | |
707 | n_vtable_elems += list_length (virtuals); | |
708 | #endif | |
709 | ||
710 | /* Set TREE_PUBLIC and TREE_EXTERN as appropriate. */ | |
e3417fcd | 711 | import_export_vtable (decl, type, 0); |
8d08fdba | 712 | |
2c73f9f5 ML |
713 | decl = pushdecl_top_level (decl); |
714 | SET_IDENTIFIER_GLOBAL_VALUE (name, decl); | |
8d08fdba MS |
715 | /* Initialize the association list for this type, based |
716 | on our first approximation. */ | |
717 | TYPE_BINFO_VTABLE (type) = decl; | |
718 | TYPE_BINFO_VIRTUALS (type) = virtuals; | |
719 | ||
da20811c | 720 | DECL_ARTIFICIAL (decl) = 1; |
8d08fdba MS |
721 | TREE_STATIC (decl) = 1; |
722 | #ifndef WRITABLE_VTABLES | |
723 | /* Make them READONLY by default. (mrs) */ | |
724 | TREE_READONLY (decl) = 1; | |
725 | #endif | |
726 | /* At one time the vtable info was grabbed 2 words at a time. This | |
727 | fails on sparc unless you have 8-byte alignment. (tiemann) */ | |
728 | DECL_ALIGN (decl) = MAX (TYPE_ALIGN (double_type_node), | |
729 | DECL_ALIGN (decl)); | |
730 | ||
731 | /* Why is this conditional? (mrs) */ | |
732 | if (binfo && write_virtuals >= 0) | |
733 | DECL_VIRTUAL_P (decl) = 1; | |
8d08fdba MS |
734 | DECL_CONTEXT (decl) = type; |
735 | ||
736 | binfo = TYPE_BINFO (type); | |
8d08fdba MS |
737 | SET_BINFO_NEW_VTABLE_MARKED (binfo); |
738 | return decl; | |
739 | } | |
740 | ||
e92cc029 MS |
741 | extern tree signed_size_zero_node; |
742 | ||
8d08fdba MS |
743 | /* Give TYPE a new virtual function table which is initialized |
744 | with a skeleton-copy of its original initialization. The only | |
745 | entry that changes is the `delta' entry, so we can really | |
746 | share a lot of structure. | |
747 | ||
748 | FOR_TYPE is the derived type which caused this table to | |
749 | be needed. | |
750 | ||
2636fde4 JM |
751 | BINFO is the type association which provided TYPE for FOR_TYPE. |
752 | ||
753 | The order in which vtables are built (by calling this function) for | |
754 | an object must remain the same, otherwise a binary incompatibility | |
755 | can result. */ | |
e92cc029 | 756 | |
8d08fdba | 757 | static void |
7177d104 MS |
758 | prepare_fresh_vtable (binfo, for_type) |
759 | tree binfo, for_type; | |
8d08fdba | 760 | { |
2636fde4 | 761 | tree basetype; |
8d08fdba | 762 | tree orig_decl = BINFO_VTABLE (binfo); |
2636fde4 JM |
763 | tree name; |
764 | tree new_decl; | |
5566b478 | 765 | tree offset; |
2636fde4 JM |
766 | tree path = binfo; |
767 | char *buf, *buf2; | |
768 | char joiner = '_'; | |
769 | int i; | |
770 | ||
771 | #ifdef JOINER | |
772 | joiner = JOINER; | |
773 | #endif | |
774 | ||
775 | basetype = TYPE_MAIN_VARIANT (BINFO_TYPE (binfo)); | |
776 | ||
777 | buf2 = TYPE_ASSEMBLER_NAME_STRING (basetype); | |
778 | i = TYPE_ASSEMBLER_NAME_LENGTH (basetype) + 1; | |
779 | ||
780 | /* We know that the vtable that we are going to create doesn't exist | |
781 | yet in the global namespace, and when we finish, it will be | |
782 | pushed into the global namespace. In complex MI hierarchies, we | |
783 | have to loop while the name we are thinking of adding is globally | |
784 | defined, adding more name components to the vtable name as we | |
785 | loop, until the name is unique. This is because in complex MI | |
786 | cases, we might have the same base more than once. This means | |
787 | that the order in which this function is called for vtables must | |
788 | remain the same, otherwise binary compatibility can be | |
789 | compromised. */ | |
790 | ||
791 | while (1) | |
792 | { | |
de35891e JM |
793 | char *buf1 = (char *) alloca (TYPE_ASSEMBLER_NAME_LENGTH (for_type) |
794 | + 1 + i); | |
2636fde4 JM |
795 | char *new_buf2; |
796 | ||
797 | sprintf (buf1, "%s%c%s", TYPE_ASSEMBLER_NAME_STRING (for_type), joiner, | |
798 | buf2); | |
799 | buf = (char *) alloca (strlen (VTABLE_NAME_FORMAT) + strlen (buf1) + 1); | |
800 | sprintf (buf, VTABLE_NAME_FORMAT, buf1); | |
801 | name = get_identifier (buf); | |
802 | ||
803 | /* If this name doesn't clash, then we can use it, otherwise | |
804 | we add more to the name until it is unique. */ | |
805 | ||
806 | if (! IDENTIFIER_GLOBAL_VALUE (name)) | |
807 | break; | |
808 | ||
809 | /* Set values for next loop through, if the name isn't unique. */ | |
810 | ||
811 | path = BINFO_INHERITANCE_CHAIN (path); | |
812 | ||
813 | /* We better not run out of stuff to make it unique. */ | |
814 | my_friendly_assert (path != NULL_TREE, 368); | |
815 | ||
816 | basetype = TYPE_MAIN_VARIANT (BINFO_TYPE (path)); | |
817 | ||
de35891e JM |
818 | if (for_type == basetype) |
819 | { | |
820 | /* If we run out of basetypes in the path, we have already | |
821 | found created a vtable with that name before, we now | |
822 | resort to tacking on _%d to distinguish them. */ | |
823 | int j = 2; | |
824 | i = TYPE_ASSEMBLER_NAME_LENGTH (basetype) + 1 + i + 1 + 3; | |
825 | buf1 = (char *) alloca (i); | |
826 | do { | |
827 | sprintf (buf1, "%s%c%s%c%d", | |
828 | TYPE_ASSEMBLER_NAME_STRING (basetype), joiner, | |
829 | buf2, joiner, j); | |
830 | buf = (char *) alloca (strlen (VTABLE_NAME_FORMAT) | |
831 | + strlen (buf1) + 1); | |
832 | sprintf (buf, VTABLE_NAME_FORMAT, buf1); | |
833 | name = get_identifier (buf); | |
834 | ||
835 | /* If this name doesn't clash, then we can use it, | |
836 | otherwise we add something different to the name until | |
837 | it is unique. */ | |
838 | } while (++j <= 999 && IDENTIFIER_GLOBAL_VALUE (name)); | |
839 | ||
840 | /* Hey, they really like MI don't they? Increase the 3 | |
841 | above to 6, and the 999 to 999999. :-) */ | |
842 | my_friendly_assert (j <= 999, 369); | |
843 | ||
844 | break; | |
845 | } | |
2636fde4 JM |
846 | |
847 | i = TYPE_ASSEMBLER_NAME_LENGTH (basetype) + 1 + i; | |
848 | new_buf2 = (char *) alloca (i); | |
849 | sprintf (new_buf2, "%s%c%s", | |
850 | TYPE_ASSEMBLER_NAME_STRING (basetype), joiner, buf2); | |
851 | buf2 = new_buf2; | |
852 | } | |
8d08fdba | 853 | |
2636fde4 | 854 | new_decl = build_decl (VAR_DECL, name, TREE_TYPE (orig_decl)); |
8d08fdba | 855 | /* Remember which class this vtable is really for. */ |
8d08fdba MS |
856 | DECL_CONTEXT (new_decl) = for_type; |
857 | ||
da20811c | 858 | DECL_ARTIFICIAL (new_decl) = 1; |
8d08fdba MS |
859 | TREE_STATIC (new_decl) = 1; |
860 | BINFO_VTABLE (binfo) = pushdecl_top_level (new_decl); | |
861 | DECL_VIRTUAL_P (new_decl) = 1; | |
862 | #ifndef WRITABLE_VTABLES | |
863 | /* Make them READONLY by default. (mrs) */ | |
864 | TREE_READONLY (new_decl) = 1; | |
865 | #endif | |
866 | DECL_ALIGN (new_decl) = DECL_ALIGN (orig_decl); | |
867 | ||
868 | /* Make fresh virtual list, so we can smash it later. */ | |
869 | BINFO_VIRTUALS (binfo) = copy_list (BINFO_VIRTUALS (binfo)); | |
db5ae43f MS |
870 | |
871 | if (TREE_VIA_VIRTUAL (binfo)) | |
6b5fbb55 MS |
872 | { |
873 | tree binfo1 = binfo_member (BINFO_TYPE (binfo), | |
874 | CLASSTYPE_VBASECLASSES (for_type)); | |
875 | ||
876 | /* XXX - This should never happen, if it does, the caller should | |
877 | ensure that the binfo is from for_type's binfos, not from any | |
878 | base type's. We can remove all this code after a while. */ | |
879 | if (binfo1 != binfo) | |
880 | warning ("internal inconsistency: binfo offset error for rtti"); | |
881 | ||
882 | offset = BINFO_OFFSET (binfo1); | |
883 | } | |
db5ae43f MS |
884 | else |
885 | offset = BINFO_OFFSET (binfo); | |
886 | ||
f30432d7 | 887 | set_rtti_entry (BINFO_VIRTUALS (binfo), |
e92cc029 | 888 | size_binop (MINUS_EXPR, signed_size_zero_node, offset), |
f30432d7 | 889 | for_type); |
8d08fdba MS |
890 | |
891 | #ifdef GATHER_STATISTICS | |
892 | n_vtables += 1; | |
893 | n_vtable_elems += list_length (BINFO_VIRTUALS (binfo)); | |
894 | #endif | |
895 | ||
896 | /* Set TREE_PUBLIC and TREE_EXTERN as appropriate. */ | |
e3417fcd | 897 | import_export_vtable (new_decl, for_type, 0); |
8d08fdba MS |
898 | |
899 | if (TREE_VIA_VIRTUAL (binfo)) | |
900 | my_friendly_assert (binfo == binfo_member (BINFO_TYPE (binfo), | |
901 | CLASSTYPE_VBASECLASSES (current_class_type)), | |
902 | 170); | |
903 | SET_BINFO_NEW_VTABLE_MARKED (binfo); | |
8d08fdba MS |
904 | } |
905 | ||
5566b478 | 906 | #if 0 |
8d08fdba MS |
907 | /* Access the virtual function table entry that logically |
908 | contains BASE_FNDECL. VIRTUALS is the virtual function table's | |
51c184be MS |
909 | initializer. We can run off the end, when dealing with virtual |
910 | destructors in MI situations, return NULL_TREE in that case. */ | |
e92cc029 | 911 | |
8d08fdba MS |
912 | static tree |
913 | get_vtable_entry (virtuals, base_fndecl) | |
914 | tree virtuals, base_fndecl; | |
915 | { | |
f30432d7 | 916 | unsigned HOST_WIDE_INT n = (HOST_BITS_PER_WIDE_INT >= BITS_PER_WORD |
8d08fdba MS |
917 | ? (TREE_INT_CST_LOW (DECL_VINDEX (base_fndecl)) |
918 | & (((unsigned HOST_WIDE_INT)1<<(BITS_PER_WORD-1))-1)) | |
919 | : TREE_INT_CST_LOW (DECL_VINDEX (base_fndecl))); | |
920 | ||
921 | #ifdef GATHER_STATISTICS | |
f30432d7 | 922 | n_vtable_searches += n; |
8d08fdba MS |
923 | #endif |
924 | ||
f30432d7 | 925 | while (n > 0 && virtuals) |
8d08fdba | 926 | { |
f30432d7 | 927 | --n; |
8d08fdba | 928 | virtuals = TREE_CHAIN (virtuals); |
8d08fdba MS |
929 | } |
930 | return virtuals; | |
931 | } | |
5566b478 | 932 | #endif |
8d08fdba MS |
933 | |
934 | /* Put new entry ENTRY into virtual function table initializer | |
935 | VIRTUALS. | |
936 | ||
937 | Also update DECL_VINDEX (FNDECL). */ | |
938 | ||
939 | static void | |
940 | modify_vtable_entry (old_entry_in_list, new_entry, fndecl) | |
941 | tree old_entry_in_list, new_entry, fndecl; | |
942 | { | |
7177d104 | 943 | tree base_fndecl = TREE_OPERAND (FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (old_entry_in_list)), 0); |
8d08fdba MS |
944 | |
945 | #ifdef NOTQUITE | |
7177d104 MS |
946 | cp_warning ("replaced %D with %D", DECL_ASSEMBLER_NAME (base_fndecl), |
947 | DECL_ASSEMBLER_NAME (fndecl)); | |
8d08fdba | 948 | #endif |
8d08fdba | 949 | TREE_VALUE (old_entry_in_list) = new_entry; |
8d08fdba | 950 | |
7177d104 | 951 | /* Now assign virtual dispatch information, if unset. */ |
e92cc029 | 952 | /* We can dispatch this, through any overridden base function. */ |
7177d104 | 953 | if (TREE_CODE (DECL_VINDEX (fndecl)) != INTEGER_CST) |
8d08fdba | 954 | { |
7177d104 MS |
955 | DECL_VINDEX (fndecl) = DECL_VINDEX (base_fndecl); |
956 | DECL_CONTEXT (fndecl) = DECL_CONTEXT (base_fndecl); | |
8d08fdba | 957 | } |
8d08fdba MS |
958 | } |
959 | ||
9a3b49ac | 960 | /* Access the virtual function table entry N. VIRTUALS is the virtual |
8d08fdba | 961 | function table's initializer. */ |
e92cc029 | 962 | |
8d08fdba | 963 | static tree |
f30432d7 | 964 | get_vtable_entry_n (virtuals, n) |
8d08fdba | 965 | tree virtuals; |
f30432d7 | 966 | unsigned HOST_WIDE_INT n; |
8d08fdba | 967 | { |
f30432d7 | 968 | while (n > 0) |
8d08fdba | 969 | { |
f30432d7 | 970 | --n; |
8d08fdba | 971 | virtuals = TREE_CHAIN (virtuals); |
8d08fdba MS |
972 | } |
973 | return virtuals; | |
974 | } | |
975 | ||
7177d104 MS |
976 | /* Add a virtual function to all the appropriate vtables for the class |
977 | T. DECL_VINDEX(X) should be error_mark_node, if we want to | |
978 | allocate a new slot in our table. If it is error_mark_node, we | |
979 | know that no other function from another vtable is overridden by X. | |
980 | HAS_VIRTUAL keeps track of how many virtuals there are in our main | |
981 | vtable for the type, and we build upon the PENDING_VIRTUALS list | |
982 | and return it. */ | |
e92cc029 | 983 | |
aa598818 JM |
984 | static void |
985 | add_virtual_function (pv, phv, has_virtual, fndecl, t) | |
986 | tree *pv, *phv; | |
8d08fdba | 987 | int *has_virtual; |
7177d104 | 988 | tree fndecl; |
e92cc029 | 989 | tree t; /* Structure type. */ |
8d08fdba | 990 | { |
aa598818 JM |
991 | tree pending_virtuals = *pv; |
992 | tree pending_hard_virtuals = *phv; | |
993 | ||
8d08fdba MS |
994 | /* FUNCTION_TYPEs and OFFSET_TYPEs no longer freely |
995 | convert to void *. Make such a conversion here. */ | |
700f8a87 | 996 | tree vfn = build1 (ADDR_EXPR, vfunc_ptr_type_node, fndecl); |
8d08fdba MS |
997 | TREE_CONSTANT (vfn) = 1; |
998 | ||
7177d104 MS |
999 | #ifndef DUMB_USER |
1000 | if (current_class_type == 0) | |
1001 | cp_warning ("internal problem, current_class_type is zero when adding `%D', please report", | |
1002 | fndecl); | |
1003 | if (current_class_type && t != current_class_type) | |
1004 | cp_warning ("internal problem, current_class_type differs when adding `%D', please report", | |
1005 | fndecl); | |
1006 | #endif | |
1007 | ||
8d08fdba MS |
1008 | /* If the virtual function is a redefinition of a prior one, |
1009 | figure out in which base class the new definition goes, | |
1010 | and if necessary, make a fresh virtual function table | |
1011 | to hold that entry. */ | |
7177d104 | 1012 | if (DECL_VINDEX (fndecl) == error_mark_node) |
8d08fdba | 1013 | { |
8926095f | 1014 | tree entry; |
8d08fdba | 1015 | |
6b5fbb55 MS |
1016 | /* We remember that this was the base sub-object for rtti. */ |
1017 | CLASSTYPE_RTTI (t) = t; | |
8d08fdba | 1018 | |
f30432d7 MS |
1019 | /* If we are using thunks, use two slots at the front, one |
1020 | for the offset pointer, one for the tdesc pointer. */ | |
1021 | if (*has_virtual == 0 && flag_vtable_thunks) | |
1022 | { | |
1023 | *has_virtual = 1; | |
1024 | } | |
1025 | ||
8d08fdba | 1026 | /* Build a new INT_CST for this DECL_VINDEX. */ |
8d08fdba MS |
1027 | { |
1028 | static tree index_table[256]; | |
e92cc029 | 1029 | tree idx; |
f30432d7 | 1030 | /* We skip a slot for the offset/tdesc entry. */ |
8d08fdba MS |
1031 | int i = ++(*has_virtual); |
1032 | ||
1033 | if (i >= 256 || index_table[i] == 0) | |
1034 | { | |
e92cc029 | 1035 | idx = build_int_2 (i, 0); |
8d08fdba | 1036 | if (i < 256) |
e92cc029 | 1037 | index_table[i] = idx; |
8d08fdba MS |
1038 | } |
1039 | else | |
e92cc029 | 1040 | idx = index_table[i]; |
8d08fdba | 1041 | |
e92cc029 MS |
1042 | /* Now assign virtual dispatch information. */ |
1043 | DECL_VINDEX (fndecl) = idx; | |
7177d104 | 1044 | DECL_CONTEXT (fndecl) = t; |
8d08fdba | 1045 | } |
8926095f | 1046 | entry = build_vtable_entry (integer_zero_node, vfn); |
7177d104 | 1047 | pending_virtuals = tree_cons (DECL_VINDEX (fndecl), entry, pending_virtuals); |
8d08fdba | 1048 | } |
7177d104 MS |
1049 | /* Might already be INTEGER_CST if declared twice in class. We will |
1050 | give error later or we've already given it. */ | |
1051 | else if (TREE_CODE (DECL_VINDEX (fndecl)) != INTEGER_CST) | |
8d08fdba MS |
1052 | { |
1053 | /* Need an entry in some other virtual function table. | |
1054 | Deal with this after we have laid out our virtual base classes. */ | |
7177d104 | 1055 | pending_hard_virtuals = temp_tree_cons (fndecl, vfn, pending_hard_virtuals); |
8d08fdba | 1056 | } |
aa598818 JM |
1057 | *pv = pending_virtuals; |
1058 | *phv = pending_hard_virtuals; | |
8d08fdba MS |
1059 | } |
1060 | \f | |
1061 | /* Obstack on which to build the vector of class methods. */ | |
1062 | struct obstack class_obstack; | |
1063 | extern struct obstack *current_obstack; | |
1064 | ||
1065 | /* Add method METHOD to class TYPE. This is used when a method | |
1066 | has been defined which did not initially appear in the class definition, | |
1067 | and helps cut down on spurious error messages. | |
1068 | ||
1069 | FIELDS is the entry in the METHOD_VEC vector entry of the class type where | |
1070 | the method should be added. */ | |
e92cc029 | 1071 | |
8d08fdba MS |
1072 | void |
1073 | add_method (type, fields, method) | |
1074 | tree type, *fields, method; | |
1075 | { | |
8d08fdba | 1076 | push_obstacks (&permanent_obstack, &permanent_obstack); |
8d08fdba MS |
1077 | |
1078 | if (fields && *fields) | |
2c73f9f5 | 1079 | *fields = build_overload (method, *fields); |
8d08fdba MS |
1080 | else if (CLASSTYPE_METHOD_VEC (type) == 0) |
1081 | { | |
1082 | tree method_vec = make_node (TREE_VEC); | |
2c73f9f5 | 1083 | if (TYPE_IDENTIFIER (type) == DECL_NAME (method)) |
8d08fdba | 1084 | { |
fc378698 MS |
1085 | /* ??? Is it possible for there to have been enough room in the |
1086 | current chunk for the tree_vec structure but not a tree_vec | |
1087 | plus a tree*? Will this work in that case? */ | |
1088 | obstack_free (current_obstack, method_vec); | |
1089 | obstack_blank (current_obstack, sizeof (struct tree_vec) + sizeof (tree *)); | |
2c73f9f5 ML |
1090 | if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (method))) |
1091 | TREE_VEC_ELT (method_vec, 1) = method; | |
fc378698 | 1092 | else |
2c73f9f5 | 1093 | TREE_VEC_ELT (method_vec, 0) = method; |
fc378698 | 1094 | TREE_VEC_LENGTH (method_vec) = 2; |
8d08fdba MS |
1095 | } |
1096 | else | |
1097 | { | |
1098 | /* ??? Is it possible for there to have been enough room in the | |
1099 | current chunk for the tree_vec structure but not a tree_vec | |
1100 | plus a tree*? Will this work in that case? */ | |
1101 | obstack_free (current_obstack, method_vec); | |
fc378698 | 1102 | obstack_blank (current_obstack, sizeof (struct tree_vec) + 2*sizeof (tree *)); |
2c73f9f5 | 1103 | TREE_VEC_ELT (method_vec, 2) = method; |
fc378698 | 1104 | TREE_VEC_LENGTH (method_vec) = 3; |
8d08fdba MS |
1105 | obstack_finish (current_obstack); |
1106 | } | |
1107 | CLASSTYPE_METHOD_VEC (type) = method_vec; | |
1108 | } | |
1109 | else | |
1110 | { | |
1111 | tree method_vec = CLASSTYPE_METHOD_VEC (type); | |
1112 | int len = TREE_VEC_LENGTH (method_vec); | |
1113 | ||
1114 | /* Adding a new ctor or dtor. This is easy because our | |
1115 | METHOD_VEC always has a slot for such entries. */ | |
2c73f9f5 | 1116 | if (TYPE_IDENTIFIER (type) == DECL_NAME (method)) |
8d08fdba | 1117 | { |
2c73f9f5 ML |
1118 | int idx = !!DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (method)); |
1119 | /* TREE_VEC_ELT (method_vec, idx) = method; */ | |
1120 | if (method != TREE_VEC_ELT (method_vec, idx)) | |
1121 | TREE_VEC_ELT (method_vec, idx) = | |
1122 | build_overload (method, TREE_VEC_ELT (method_vec, idx)); | |
8d08fdba MS |
1123 | } |
1124 | else | |
1125 | { | |
1126 | /* This is trickier. We try to extend the TREE_VEC in-place, | |
1127 | but if that does not work, we copy all its data to a new | |
1128 | TREE_VEC that's large enough. */ | |
1129 | struct obstack *ob = &class_obstack; | |
1130 | tree *end = (tree *)obstack_next_free (ob); | |
1131 | ||
1132 | if (end != TREE_VEC_END (method_vec)) | |
1133 | { | |
1134 | ob = current_obstack; | |
1135 | TREE_VEC_LENGTH (method_vec) += 1; | |
1136 | TREE_VEC_ELT (method_vec, len) = NULL_TREE; | |
1137 | method_vec = copy_node (method_vec); | |
1138 | TREE_VEC_LENGTH (method_vec) -= 1; | |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | tree tmp_vec = (tree) obstack_base (ob); | |
1143 | if (obstack_room (ob) < sizeof (tree)) | |
1144 | { | |
1145 | obstack_blank (ob, sizeof (struct tree_common) | |
1146 | + tree_code_length[(int) TREE_VEC] | |
1147 | * sizeof (char *) | |
1148 | + len * sizeof (tree)); | |
1149 | tmp_vec = (tree) obstack_base (ob); | |
1daa5dd8 | 1150 | bcopy ((char *) method_vec, (char *) tmp_vec, |
8d08fdba MS |
1151 | (sizeof (struct tree_common) |
1152 | + tree_code_length[(int) TREE_VEC] * sizeof (char *) | |
1153 | + (len-1) * sizeof (tree))); | |
1154 | method_vec = tmp_vec; | |
1155 | } | |
1156 | else | |
1157 | obstack_blank (ob, sizeof (tree)); | |
1158 | } | |
1159 | ||
1160 | obstack_finish (ob); | |
2c73f9f5 | 1161 | TREE_VEC_ELT (method_vec, len) = method; |
8d08fdba MS |
1162 | TREE_VEC_LENGTH (method_vec) = len + 1; |
1163 | CLASSTYPE_METHOD_VEC (type) = method_vec; | |
1164 | ||
1165 | if (TYPE_BINFO_BASETYPES (type) && CLASSTYPE_BASELINK_VEC (type)) | |
1166 | { | |
1167 | /* ??? May be better to know whether these can be extended? */ | |
1168 | tree baselink_vec = CLASSTYPE_BASELINK_VEC (type); | |
1169 | ||
1170 | TREE_VEC_LENGTH (baselink_vec) += 1; | |
1171 | CLASSTYPE_BASELINK_VEC (type) = copy_node (baselink_vec); | |
1172 | TREE_VEC_LENGTH (baselink_vec) -= 1; | |
1173 | ||
1174 | TREE_VEC_ELT (CLASSTYPE_BASELINK_VEC (type), len) = 0; | |
1175 | } | |
1176 | } | |
1177 | } | |
2c73f9f5 ML |
1178 | DECL_CONTEXT (method) = type; |
1179 | DECL_CLASS_CONTEXT (method) = type; | |
8d08fdba MS |
1180 | |
1181 | pop_obstacks (); | |
1182 | } | |
1183 | ||
1184 | /* Subroutines of finish_struct. */ | |
1185 | ||
1186 | /* Look through the list of fields for this struct, deleting | |
1187 | duplicates as we go. This must be recursive to handle | |
1188 | anonymous unions. | |
1189 | ||
1190 | FIELD is the field which may not appear anywhere in FIELDS. | |
1191 | FIELD_PTR, if non-null, is the starting point at which | |
1192 | chained deletions may take place. | |
1193 | The value returned is the first acceptable entry found | |
1194 | in FIELDS. | |
1195 | ||
1196 | Note that anonymous fields which are not of UNION_TYPE are | |
1197 | not duplicates, they are just anonymous fields. This happens | |
1198 | when we have unnamed bitfields, for example. */ | |
e92cc029 | 1199 | |
8d08fdba | 1200 | static tree |
00595019 MS |
1201 | delete_duplicate_fields_1 (field, fields) |
1202 | tree field, fields; | |
8d08fdba MS |
1203 | { |
1204 | tree x; | |
00595019 | 1205 | tree prev = 0; |
8d08fdba MS |
1206 | if (DECL_NAME (field) == 0) |
1207 | { | |
1208 | if (TREE_CODE (TREE_TYPE (field)) != UNION_TYPE) | |
1209 | return fields; | |
1210 | ||
1211 | for (x = TYPE_FIELDS (TREE_TYPE (field)); x; x = TREE_CHAIN (x)) | |
00595019 | 1212 | fields = delete_duplicate_fields_1 (x, fields); |
8d08fdba MS |
1213 | return fields; |
1214 | } | |
1215 | else | |
1216 | { | |
1217 | for (x = fields; x; prev = x, x = TREE_CHAIN (x)) | |
1218 | { | |
1219 | if (DECL_NAME (x) == 0) | |
1220 | { | |
1221 | if (TREE_CODE (TREE_TYPE (x)) != UNION_TYPE) | |
1222 | continue; | |
1223 | TYPE_FIELDS (TREE_TYPE (x)) | |
00595019 | 1224 | = delete_duplicate_fields_1 (field, TYPE_FIELDS (TREE_TYPE (x))); |
8d08fdba MS |
1225 | if (TYPE_FIELDS (TREE_TYPE (x)) == 0) |
1226 | { | |
1227 | if (prev == 0) | |
1228 | fields = TREE_CHAIN (fields); | |
1229 | else | |
1230 | TREE_CHAIN (prev) = TREE_CHAIN (x); | |
1231 | } | |
1232 | } | |
1233 | else | |
1234 | { | |
1235 | if (DECL_NAME (field) == DECL_NAME (x)) | |
1236 | { | |
1237 | if (TREE_CODE (field) == CONST_DECL | |
1238 | && TREE_CODE (x) == CONST_DECL) | |
1239 | cp_error_at ("duplicate enum value `%D'", x); | |
1240 | else if (TREE_CODE (field) == CONST_DECL | |
1241 | || TREE_CODE (x) == CONST_DECL) | |
1242 | cp_error_at ("duplicate field `%D' (as enum and non-enum)", | |
1243 | x); | |
1244 | else if (TREE_CODE (field) == TYPE_DECL | |
1245 | && TREE_CODE (x) == TYPE_DECL) | |
fc378698 MS |
1246 | { |
1247 | if (TREE_TYPE (field) == TREE_TYPE (x)) | |
1248 | continue; | |
1249 | cp_error_at ("duplicate nested type `%D'", x); | |
1250 | } | |
8d08fdba MS |
1251 | else if (TREE_CODE (field) == TYPE_DECL |
1252 | || TREE_CODE (x) == TYPE_DECL) | |
5566b478 MS |
1253 | { |
1254 | /* Hide tag decls. */ | |
1255 | if ((TREE_CODE (field) == TYPE_DECL | |
1256 | && DECL_ARTIFICIAL (field)) | |
1257 | || (TREE_CODE (x) == TYPE_DECL | |
1258 | && DECL_ARTIFICIAL (x))) | |
1259 | continue; | |
1260 | cp_error_at ("duplicate field `%D' (as type and non-type)", | |
1261 | x); | |
1262 | } | |
8d08fdba MS |
1263 | else |
1264 | cp_error_at ("duplicate member `%D'", x); | |
1265 | if (prev == 0) | |
1266 | fields = TREE_CHAIN (fields); | |
1267 | else | |
1268 | TREE_CHAIN (prev) = TREE_CHAIN (x); | |
1269 | } | |
1270 | } | |
1271 | } | |
1272 | } | |
1273 | return fields; | |
1274 | } | |
1275 | ||
1276 | static void | |
1277 | delete_duplicate_fields (fields) | |
1278 | tree fields; | |
1279 | { | |
1280 | tree x; | |
1281 | for (x = fields; x && TREE_CHAIN (x); x = TREE_CHAIN (x)) | |
00595019 | 1282 | TREE_CHAIN (x) = delete_duplicate_fields_1 (x, TREE_CHAIN (x)); |
8d08fdba MS |
1283 | } |
1284 | ||
1285 | /* Change the access of FDECL to ACCESS in T. | |
1286 | Return 1 if change was legit, otherwise return 0. */ | |
e92cc029 | 1287 | |
8d08fdba MS |
1288 | static int |
1289 | alter_access (t, fdecl, access) | |
1290 | tree t; | |
1291 | tree fdecl; | |
be99da77 | 1292 | tree access; |
8d08fdba MS |
1293 | { |
1294 | tree elem = purpose_member (t, DECL_ACCESS (fdecl)); | |
38afd588 | 1295 | if (elem) |
8d08fdba | 1296 | { |
38afd588 | 1297 | if (TREE_VALUE (elem) != access) |
8d08fdba | 1298 | { |
38afd588 MM |
1299 | if (TREE_CODE (TREE_TYPE (fdecl)) == FUNCTION_DECL) |
1300 | cp_error_at ("conflicting access specifications for method `%D', ignored", TREE_TYPE (fdecl)); | |
1301 | else | |
1302 | error ("conflicting access specifications for field `%s', ignored", | |
1303 | IDENTIFIER_POINTER (DECL_NAME (fdecl))); | |
8d08fdba MS |
1304 | } |
1305 | else | |
430bb96b JL |
1306 | { |
1307 | /* They're changing the access to the same thing they changed | |
1308 | it to before. That's OK. */ | |
1309 | ; | |
1310 | } | |
db5ae43f | 1311 | } |
38afd588 | 1312 | else |
8d08fdba | 1313 | { |
38afd588 MM |
1314 | enforce_access (TYPE_BINFO (t), fdecl); |
1315 | ||
be99da77 | 1316 | DECL_ACCESS (fdecl) = tree_cons (t, access, DECL_ACCESS (fdecl)); |
8d08fdba MS |
1317 | return 1; |
1318 | } | |
1319 | return 0; | |
1320 | } | |
1321 | ||
8d08fdba MS |
1322 | /* If FOR_TYPE needs to reinitialize virtual function table pointers |
1323 | for TYPE's sub-objects, add such reinitializations to BASE_INIT_LIST. | |
1324 | Returns BASE_INIT_LIST appropriately modified. */ | |
1325 | ||
1326 | static tree | |
1327 | maybe_fixup_vptrs (for_type, binfo, base_init_list) | |
1328 | tree for_type, binfo, base_init_list; | |
1329 | { | |
1330 | /* Now reinitialize any slots that don't fall under our virtual | |
1331 | function table pointer. */ | |
1332 | tree vfields = CLASSTYPE_VFIELDS (BINFO_TYPE (binfo)); | |
1333 | while (vfields) | |
1334 | { | |
1335 | tree basetype = VF_NORMAL_VALUE (vfields) | |
1336 | ? TYPE_MAIN_VARIANT (VF_NORMAL_VALUE (vfields)) | |
1337 | : VF_BASETYPE_VALUE (vfields); | |
1338 | ||
1339 | tree base_binfo = get_binfo (basetype, for_type, 0); | |
e92cc029 | 1340 | /* Punt until this is implemented. */ |
8d08fdba MS |
1341 | if (1 /* BINFO_MODIFIED (base_binfo) */) |
1342 | { | |
1343 | tree base_offset = get_vfield_offset (base_binfo); | |
1344 | if (! tree_int_cst_equal (base_offset, get_vfield_offset (TYPE_BINFO (for_type))) | |
1345 | && ! tree_int_cst_equal (base_offset, get_vfield_offset (binfo))) | |
1346 | base_init_list = tree_cons (error_mark_node, base_binfo, | |
1347 | base_init_list); | |
1348 | } | |
1349 | vfields = TREE_CHAIN (vfields); | |
1350 | } | |
1351 | return base_init_list; | |
1352 | } | |
1353 | ||
1354 | /* If TYPE does not have a constructor, then the compiler must | |
1355 | manually deal with all of the initialization this type requires. | |
1356 | ||
1357 | If a base initializer exists only to fill in the virtual function | |
1358 | table pointer, then we mark that fact with the TREE_VIRTUAL bit. | |
1359 | This way, we avoid multiple initializations of the same field by | |
1360 | each virtual function table up the class hierarchy. | |
1361 | ||
1362 | Virtual base class pointers are not initialized here. They are | |
1363 | initialized only at the "top level" of object creation. If we | |
1364 | initialized them here, we would have to skip a lot of work. */ | |
1365 | ||
1366 | static void | |
1367 | build_class_init_list (type) | |
1368 | tree type; | |
1369 | { | |
1370 | tree base_init_list = NULL_TREE; | |
1371 | tree member_init_list = NULL_TREE; | |
1372 | ||
1373 | /* Since we build member_init_list and base_init_list using | |
1374 | tree_cons, backwards fields the all through work. */ | |
1375 | tree x; | |
1376 | tree binfos = BINFO_BASETYPES (TYPE_BINFO (type)); | |
1377 | int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
1378 | ||
1379 | for (x = TYPE_FIELDS (type); x; x = TREE_CHAIN (x)) | |
1380 | { | |
1381 | if (TREE_CODE (x) != FIELD_DECL) | |
1382 | continue; | |
1383 | ||
1384 | if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (x)) | |
1385 | || DECL_INITIAL (x) != NULL_TREE) | |
1386 | member_init_list = tree_cons (x, type, member_init_list); | |
1387 | } | |
1388 | member_init_list = nreverse (member_init_list); | |
1389 | ||
1390 | /* We will end up doing this last. Need special marker | |
1391 | to avoid infinite regress. */ | |
1392 | if (TYPE_VIRTUAL_P (type)) | |
1393 | { | |
1394 | base_init_list = build_tree_list (error_mark_node, TYPE_BINFO (type)); | |
1395 | if (CLASSTYPE_NEEDS_VIRTUAL_REINIT (type) == 0) | |
1396 | TREE_VALUE (base_init_list) = NULL_TREE; | |
1397 | TREE_ADDRESSABLE (base_init_list) = 1; | |
1398 | } | |
1399 | ||
1400 | /* Each base class which needs to have initialization | |
1401 | of some kind gets to make such requests known here. */ | |
1402 | for (i = n_baseclasses-1; i >= 0; i--) | |
1403 | { | |
1404 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
1405 | tree blist; | |
1406 | ||
1407 | /* Don't initialize virtual baseclasses this way. */ | |
1408 | if (TREE_VIA_VIRTUAL (base_binfo)) | |
1409 | continue; | |
1410 | ||
1411 | if (TYPE_HAS_CONSTRUCTOR (BINFO_TYPE (base_binfo))) | |
1412 | { | |
1413 | /* ...and the last shall come first... */ | |
1414 | base_init_list = maybe_fixup_vptrs (type, base_binfo, base_init_list); | |
1415 | base_init_list = tree_cons (NULL_TREE, base_binfo, base_init_list); | |
1416 | continue; | |
1417 | } | |
1418 | ||
1419 | if ((blist = CLASSTYPE_BASE_INIT_LIST (BINFO_TYPE (base_binfo))) == NULL_TREE) | |
1420 | /* Nothing to initialize. */ | |
1421 | continue; | |
1422 | ||
1423 | /* ...ditto... */ | |
1424 | base_init_list = maybe_fixup_vptrs (type, base_binfo, base_init_list); | |
1425 | ||
1426 | /* This is normally true for single inheritance. | |
1427 | The win is we can shrink the chain of initializations | |
1428 | to be done by only converting to the actual type | |
1429 | we are interested in. */ | |
1430 | if (TREE_VALUE (blist) | |
1431 | && TREE_CODE (TREE_VALUE (blist)) == TREE_VEC | |
1432 | && tree_int_cst_equal (BINFO_OFFSET (base_binfo), | |
1433 | BINFO_OFFSET (TREE_VALUE (blist)))) | |
1434 | { | |
1435 | if (base_init_list) | |
1436 | { | |
1437 | /* Does it do more than just fill in a | |
1438 | virtual function table pointer? */ | |
1439 | if (! TREE_ADDRESSABLE (blist)) | |
1440 | base_init_list = build_tree_list (blist, base_init_list); | |
1441 | /* Can we get by just with the virtual function table | |
1442 | pointer that it fills in? */ | |
1443 | else if (TREE_ADDRESSABLE (base_init_list) | |
1444 | && TREE_VALUE (base_init_list) == 0) | |
1445 | base_init_list = blist; | |
1446 | /* Maybe, but it is not obvious as the previous case. */ | |
1447 | else if (! CLASSTYPE_NEEDS_VIRTUAL_REINIT (type)) | |
1448 | { | |
1449 | tree last = tree_last (base_init_list); | |
1450 | while (TREE_VALUE (last) | |
1451 | && TREE_CODE (TREE_VALUE (last)) == TREE_LIST) | |
1452 | last = tree_last (TREE_VALUE (last)); | |
1453 | if (TREE_VALUE (last) == 0) | |
1454 | base_init_list = build_tree_list (blist, base_init_list); | |
1455 | } | |
1456 | } | |
1457 | else | |
1458 | base_init_list = blist; | |
1459 | } | |
1460 | else | |
1461 | { | |
1462 | /* The function expand_aggr_init knows how to do the | |
1463 | initialization of `basetype' without getting | |
1464 | an explicit `blist'. */ | |
1465 | if (base_init_list) | |
1466 | base_init_list = tree_cons (NULL_TREE, base_binfo, base_init_list); | |
1467 | else | |
1468 | base_init_list = CLASSTYPE_BINFO_AS_LIST (BINFO_TYPE (base_binfo)); | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | if (base_init_list) | |
a703fb38 KG |
1473 | { |
1474 | if (member_init_list) | |
1475 | CLASSTYPE_BASE_INIT_LIST (type) = | |
1476 | build_tree_list (base_init_list, member_init_list); | |
1477 | else | |
1478 | CLASSTYPE_BASE_INIT_LIST (type) = base_init_list; | |
1479 | } | |
8d08fdba MS |
1480 | else if (member_init_list) |
1481 | CLASSTYPE_BASE_INIT_LIST (type) = member_init_list; | |
1482 | } | |
1483 | \f | |
1484 | struct base_info | |
1485 | { | |
1486 | int has_virtual; | |
1487 | int max_has_virtual; | |
1488 | int n_ancestors; | |
1489 | tree vfield; | |
1490 | tree vfields; | |
6b5fbb55 | 1491 | tree rtti; |
8d08fdba MS |
1492 | char cant_have_default_ctor; |
1493 | char cant_have_const_ctor; | |
8d08fdba | 1494 | char no_const_asn_ref; |
8d08fdba MS |
1495 | }; |
1496 | ||
1497 | /* Record information about type T derived from its base classes. | |
1498 | Store most of that information in T itself, and place the | |
1499 | remaining information in the struct BASE_INFO. | |
1500 | ||
1501 | Propagate basetype offsets throughout the lattice. Note that the | |
1502 | lattice topped by T is really a pair: it's a DAG that gives the | |
1503 | structure of the derivation hierarchy, and it's a list of the | |
1504 | virtual baseclasses that appear anywhere in the DAG. When a vbase | |
1505 | type appears in the DAG, it's offset is 0, and it's children start | |
1506 | their offsets from that point. When a vbase type appears in the list, | |
1507 | its offset is the offset it has in the hierarchy, and its children's | |
1508 | offsets include that offset in theirs. | |
1509 | ||
1510 | Returns the index of the first base class to have virtual functions, | |
9a71c18b | 1511 | or -1 if no such base class. */ |
8d08fdba MS |
1512 | |
1513 | static int | |
9a71c18b | 1514 | finish_base_struct (t, b) |
8d08fdba MS |
1515 | tree t; |
1516 | struct base_info *b; | |
8d08fdba | 1517 | { |
9a71c18b | 1518 | tree binfos = TYPE_BINFO_BASETYPES (t); |
8d08fdba MS |
1519 | int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; |
1520 | int first_vfn_base_index = -1; | |
1daa5dd8 | 1521 | bzero ((char *) b, sizeof (struct base_info)); |
8d08fdba MS |
1522 | |
1523 | for (i = 0; i < n_baseclasses; i++) | |
1524 | { | |
1525 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
1526 | tree basetype = BINFO_TYPE (base_binfo); | |
1527 | ||
9a71c18b JM |
1528 | /* Effective C++ rule 14. We only need to check TYPE_VIRTUAL_P |
1529 | here because the case of virtual functions but non-virtual | |
1530 | dtor is handled in finish_struct_1. */ | |
1531 | if (warn_ecpp && ! TYPE_VIRTUAL_P (basetype) | |
1532 | && TYPE_HAS_DESTRUCTOR (basetype)) | |
1533 | cp_warning ("base class `%#T' has a non-virtual destructor", basetype); | |
1534 | ||
8d08fdba MS |
1535 | /* If the type of basetype is incomplete, then |
1536 | we already complained about that fact | |
1537 | (and we should have fixed it up as well). */ | |
1538 | if (TYPE_SIZE (basetype) == 0) | |
1539 | { | |
1540 | int j; | |
1541 | /* The base type is of incomplete type. It is | |
1542 | probably best to pretend that it does not | |
1543 | exist. */ | |
1544 | if (i == n_baseclasses-1) | |
1545 | TREE_VEC_ELT (binfos, i) = NULL_TREE; | |
1546 | TREE_VEC_LENGTH (binfos) -= 1; | |
1547 | n_baseclasses -= 1; | |
1548 | for (j = i; j+1 < n_baseclasses; j++) | |
1549 | TREE_VEC_ELT (binfos, j) = TREE_VEC_ELT (binfos, j+1); | |
1550 | } | |
1551 | ||
e349ee73 | 1552 | if (! TYPE_HAS_CONST_INIT_REF (basetype)) |
8d08fdba | 1553 | b->cant_have_const_ctor = 1; |
8d08fdba MS |
1554 | |
1555 | if (TYPE_HAS_CONSTRUCTOR (basetype) | |
1556 | && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (basetype)) | |
1557 | { | |
1558 | b->cant_have_default_ctor = 1; | |
1559 | if (! TYPE_HAS_CONSTRUCTOR (t)) | |
1560 | { | |
1561 | cp_pedwarn ("base `%T' with only non-default constructor", | |
1562 | basetype); | |
1563 | cp_pedwarn ("in class without a constructor"); | |
1564 | } | |
1565 | } | |
1566 | ||
1567 | if (TYPE_HAS_ASSIGN_REF (basetype) | |
1568 | && !TYPE_HAS_CONST_ASSIGN_REF (basetype)) | |
1569 | b->no_const_asn_ref = 1; | |
8d08fdba MS |
1570 | |
1571 | b->n_ancestors += CLASSTYPE_N_SUPERCLASSES (basetype); | |
1572 | TYPE_NEEDS_CONSTRUCTING (t) |= TYPE_NEEDS_CONSTRUCTING (basetype); | |
1573 | TYPE_NEEDS_DESTRUCTOR (t) |= TYPE_NEEDS_DESTRUCTOR (basetype); | |
1574 | TYPE_HAS_COMPLEX_ASSIGN_REF (t) |= TYPE_HAS_COMPLEX_ASSIGN_REF (basetype); | |
e8abc66f | 1575 | TYPE_HAS_COMPLEX_INIT_REF (t) |= TYPE_HAS_COMPLEX_INIT_REF (basetype); |
8d08fdba MS |
1576 | |
1577 | TYPE_OVERLOADS_CALL_EXPR (t) |= TYPE_OVERLOADS_CALL_EXPR (basetype); | |
1578 | TYPE_OVERLOADS_ARRAY_REF (t) |= TYPE_OVERLOADS_ARRAY_REF (basetype); | |
1579 | TYPE_OVERLOADS_ARROW (t) |= TYPE_OVERLOADS_ARROW (basetype); | |
1580 | ||
8d08fdba MS |
1581 | if (! TREE_VIA_VIRTUAL (base_binfo)) |
1582 | CLASSTYPE_N_SUPERCLASSES (t) += 1; | |
1583 | ||
1584 | if (TYPE_VIRTUAL_P (basetype)) | |
1585 | { | |
6b5fbb55 MS |
1586 | /* Ensure that this is set from at least a virtual base |
1587 | class. */ | |
1588 | if (b->rtti == NULL_TREE) | |
1589 | b->rtti = CLASSTYPE_RTTI (basetype); | |
1590 | ||
8d08fdba MS |
1591 | /* Don't borrow virtuals from virtual baseclasses. */ |
1592 | if (TREE_VIA_VIRTUAL (base_binfo)) | |
1593 | continue; | |
1594 | ||
1595 | if (first_vfn_base_index < 0) | |
1596 | { | |
1597 | tree vfields; | |
1598 | first_vfn_base_index = i; | |
1599 | ||
7177d104 MS |
1600 | /* Update these two, now that we know what vtable we are |
1601 | going to extend. This is so that we can add virtual | |
1602 | functions, and override them properly. */ | |
9a71c18b JM |
1603 | TYPE_BINFO_VTABLE (t) = TYPE_BINFO_VTABLE (basetype); |
1604 | TYPE_BINFO_VIRTUALS (t) = TYPE_BINFO_VIRTUALS (basetype); | |
8d08fdba MS |
1605 | b->has_virtual = CLASSTYPE_VSIZE (basetype); |
1606 | b->vfield = CLASSTYPE_VFIELD (basetype); | |
1607 | b->vfields = copy_list (CLASSTYPE_VFIELDS (basetype)); | |
1608 | vfields = b->vfields; | |
1609 | while (vfields) | |
1610 | { | |
1611 | if (VF_BINFO_VALUE (vfields) == NULL_TREE | |
1612 | || ! TREE_VIA_VIRTUAL (VF_BINFO_VALUE (vfields))) | |
1613 | { | |
1614 | tree value = VF_BASETYPE_VALUE (vfields); | |
1615 | if (DECL_NAME (CLASSTYPE_VFIELD (value)) | |
1616 | == DECL_NAME (CLASSTYPE_VFIELD (basetype))) | |
1617 | VF_NORMAL_VALUE (b->vfields) = basetype; | |
1618 | else | |
1619 | VF_NORMAL_VALUE (b->vfields) = VF_NORMAL_VALUE (vfields); | |
1620 | } | |
1621 | vfields = TREE_CHAIN (vfields); | |
1622 | } | |
1623 | CLASSTYPE_VFIELD (t) = b->vfield; | |
1624 | } | |
1625 | else | |
1626 | { | |
1627 | /* Only add unique vfields, and flatten them out as we go. */ | |
1628 | tree vfields = CLASSTYPE_VFIELDS (basetype); | |
1629 | while (vfields) | |
1630 | { | |
1631 | if (VF_BINFO_VALUE (vfields) == NULL_TREE | |
1632 | || ! TREE_VIA_VIRTUAL (VF_BINFO_VALUE (vfields))) | |
1633 | { | |
1634 | tree value = VF_BASETYPE_VALUE (vfields); | |
1635 | b->vfields = tree_cons (base_binfo, value, b->vfields); | |
1636 | if (DECL_NAME (CLASSTYPE_VFIELD (value)) | |
1637 | == DECL_NAME (CLASSTYPE_VFIELD (basetype))) | |
1638 | VF_NORMAL_VALUE (b->vfields) = basetype; | |
1639 | else | |
1640 | VF_NORMAL_VALUE (b->vfields) = VF_NORMAL_VALUE (vfields); | |
1641 | } | |
1642 | vfields = TREE_CHAIN (vfields); | |
1643 | } | |
1644 | ||
1645 | if (b->has_virtual == 0) | |
1646 | { | |
1647 | first_vfn_base_index = i; | |
2986ae00 MS |
1648 | |
1649 | /* Update these two, now that we know what vtable we are | |
1650 | going to extend. This is so that we can add virtual | |
1651 | functions, and override them properly. */ | |
9a71c18b JM |
1652 | TYPE_BINFO_VTABLE (t) = TYPE_BINFO_VTABLE (basetype); |
1653 | TYPE_BINFO_VIRTUALS (t) = TYPE_BINFO_VIRTUALS (basetype); | |
8d08fdba MS |
1654 | b->has_virtual = CLASSTYPE_VSIZE (basetype); |
1655 | b->vfield = CLASSTYPE_VFIELD (basetype); | |
1656 | CLASSTYPE_VFIELD (t) = b->vfield; | |
1657 | /* When we install the first one, set the VF_NORMAL_VALUE | |
1658 | to be the current class, as this it is the most derived | |
1659 | class. Hopefully, this is not set to something else | |
1660 | later. (mrs) */ | |
1661 | vfields = b->vfields; | |
1662 | while (vfields) | |
1663 | { | |
1664 | if (DECL_NAME (CLASSTYPE_VFIELD (t)) | |
1665 | == DECL_NAME (CLASSTYPE_VFIELD (basetype))) | |
1666 | { | |
1667 | VF_NORMAL_VALUE (vfields) = t; | |
1668 | /* There should only be one of them! And it should | |
1669 | always be found, if we get into here. (mrs) */ | |
1670 | break; | |
1671 | } | |
1672 | vfields = TREE_CHAIN (vfields); | |
1673 | } | |
1674 | } | |
1675 | } | |
1676 | } | |
1677 | } | |
1678 | ||
9a71c18b JM |
1679 | /* This comment said "Must come after offsets are fixed for all bases." |
1680 | Well, now this happens before the offsets are fixed, but it seems to | |
1681 | work fine. Guess we'll see... */ | |
8d08fdba MS |
1682 | for (i = 0; i < n_baseclasses; i++) |
1683 | { | |
1684 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
1685 | tree basetype = BINFO_TYPE (base_binfo); | |
1686 | ||
9a71c18b | 1687 | if (get_base_distance (basetype, t, 0, (tree*)0) == -2) |
8d08fdba MS |
1688 | { |
1689 | cp_warning ("direct base `%T' inaccessible in `%T' due to ambiguity", | |
1690 | basetype, t); | |
8d08fdba MS |
1691 | } |
1692 | } | |
51c184be | 1693 | { |
9a71c18b | 1694 | tree v = get_vbase_types (t); |
51c184be MS |
1695 | |
1696 | for (; v; v = TREE_CHAIN (v)) | |
1697 | { | |
1698 | tree basetype = BINFO_TYPE (v); | |
9a71c18b | 1699 | if (get_base_distance (basetype, t, 0, (tree*)0) == -2) |
51c184be MS |
1700 | { |
1701 | if (extra_warnings) | |
1702 | cp_warning ("virtual base `%T' inaccessible in `%T' due to ambiguity", | |
1703 | basetype, t); | |
51c184be MS |
1704 | } |
1705 | } | |
1706 | } | |
8d08fdba MS |
1707 | |
1708 | { | |
1709 | tree vfields; | |
1710 | /* Find the base class with the largest number of virtual functions. */ | |
1711 | for (vfields = b->vfields; vfields; vfields = TREE_CHAIN (vfields)) | |
1712 | { | |
1713 | if (CLASSTYPE_VSIZE (VF_BASETYPE_VALUE (vfields)) > b->max_has_virtual) | |
1714 | b->max_has_virtual = CLASSTYPE_VSIZE (VF_BASETYPE_VALUE (vfields)); | |
1715 | if (VF_DERIVED_VALUE (vfields) | |
1716 | && CLASSTYPE_VSIZE (VF_DERIVED_VALUE (vfields)) > b->max_has_virtual) | |
1717 | b->max_has_virtual = CLASSTYPE_VSIZE (VF_DERIVED_VALUE (vfields)); | |
1718 | } | |
1719 | } | |
1720 | ||
1721 | if (b->vfield == 0) | |
1722 | /* If all virtual functions come only from virtual baseclasses. */ | |
1723 | return -1; | |
6b5fbb55 MS |
1724 | |
1725 | /* Update the rtti base if we have a non-virtual base class version | |
1726 | of it. */ | |
1727 | b->rtti = CLASSTYPE_RTTI (BINFO_TYPE (TREE_VEC_ELT (binfos, first_vfn_base_index))); | |
1728 | ||
8d08fdba MS |
1729 | return first_vfn_base_index; |
1730 | } | |
1731 | ||
1732 | static int | |
1733 | typecode_p (type, code) | |
1734 | tree type; | |
1735 | enum tree_code code; | |
1736 | { | |
1737 | return (TREE_CODE (type) == code | |
1738 | || (TREE_CODE (type) == REFERENCE_TYPE | |
1739 | && TREE_CODE (TREE_TYPE (type)) == code)); | |
1740 | } | |
1741 | \f | |
1742 | /* Set memoizing fields and bits of T (and its variants) for later use. | |
1743 | MAX_HAS_VIRTUAL is the largest size of any T's virtual function tables. */ | |
e92cc029 | 1744 | |
8d08fdba MS |
1745 | static void |
1746 | finish_struct_bits (t, max_has_virtual) | |
1747 | tree t; | |
1748 | int max_has_virtual; | |
1749 | { | |
1750 | int i, n_baseclasses = CLASSTYPE_N_BASECLASSES (t); | |
8d08fdba MS |
1751 | |
1752 | /* Fix up variants (if any). */ | |
1753 | tree variants = TYPE_NEXT_VARIANT (t); | |
1754 | while (variants) | |
1755 | { | |
1756 | /* These fields are in the _TYPE part of the node, not in | |
1757 | the TYPE_LANG_SPECIFIC component, so they are not shared. */ | |
1758 | TYPE_HAS_CONSTRUCTOR (variants) = TYPE_HAS_CONSTRUCTOR (t); | |
1759 | TYPE_HAS_DESTRUCTOR (variants) = TYPE_HAS_DESTRUCTOR (t); | |
1760 | TYPE_NEEDS_CONSTRUCTING (variants) = TYPE_NEEDS_CONSTRUCTING (t); | |
1761 | TYPE_NEEDS_DESTRUCTOR (variants) = TYPE_NEEDS_DESTRUCTOR (t); | |
1762 | ||
1763 | TYPE_USES_COMPLEX_INHERITANCE (variants) = TYPE_USES_COMPLEX_INHERITANCE (t); | |
1764 | TYPE_VIRTUAL_P (variants) = TYPE_VIRTUAL_P (t); | |
1765 | TYPE_USES_VIRTUAL_BASECLASSES (variants) = TYPE_USES_VIRTUAL_BASECLASSES (t); | |
1766 | /* Copy whatever these are holding today. */ | |
1767 | TYPE_MIN_VALUE (variants) = TYPE_MIN_VALUE (t); | |
1768 | TYPE_MAX_VALUE (variants) = TYPE_MAX_VALUE (t); | |
5566b478 | 1769 | TYPE_FIELDS (variants) = TYPE_FIELDS (t); |
e92cc029 | 1770 | TYPE_SIZE (variants) = TYPE_SIZE (t); |
8d08fdba MS |
1771 | variants = TYPE_NEXT_VARIANT (variants); |
1772 | } | |
1773 | ||
1774 | if (n_baseclasses && max_has_virtual) | |
1775 | { | |
1776 | /* Done by `finish_struct' for classes without baseclasses. */ | |
39211cd5 | 1777 | int might_have_abstract_virtuals = CLASSTYPE_ABSTRACT_VIRTUALS (t) != 0; |
8d08fdba MS |
1778 | tree binfos = TYPE_BINFO_BASETYPES (t); |
1779 | for (i = n_baseclasses-1; i >= 0; i--) | |
1780 | { | |
39211cd5 | 1781 | might_have_abstract_virtuals |
8d08fdba | 1782 | |= (CLASSTYPE_ABSTRACT_VIRTUALS (BINFO_TYPE (TREE_VEC_ELT (binfos, i))) != 0); |
39211cd5 | 1783 | if (might_have_abstract_virtuals) |
8d08fdba MS |
1784 | break; |
1785 | } | |
39211cd5 MS |
1786 | if (might_have_abstract_virtuals) |
1787 | { | |
1788 | /* We use error_mark_node from override_one_vtable to signal | |
e92cc029 | 1789 | an artificial abstract. */ |
39211cd5 MS |
1790 | if (CLASSTYPE_ABSTRACT_VIRTUALS (t) == error_mark_node) |
1791 | CLASSTYPE_ABSTRACT_VIRTUALS (t) = NULL_TREE; | |
1792 | CLASSTYPE_ABSTRACT_VIRTUALS (t) = get_abstract_virtuals (t); | |
1793 | } | |
8d08fdba MS |
1794 | } |
1795 | ||
1796 | if (n_baseclasses) | |
1797 | { | |
1798 | /* Notice whether this class has type conversion functions defined. */ | |
1799 | tree binfo = TYPE_BINFO (t); | |
1800 | tree binfos = BINFO_BASETYPES (binfo); | |
1801 | tree basetype; | |
1802 | ||
1803 | for (i = n_baseclasses-1; i >= 0; i--) | |
1804 | { | |
1805 | basetype = BINFO_TYPE (TREE_VEC_ELT (binfos, i)); | |
1806 | ||
0b41abe6 | 1807 | TYPE_HAS_CONVERSION (t) |= TYPE_HAS_CONVERSION (basetype); |
8d08fdba MS |
1808 | if (CLASSTYPE_MAX_DEPTH (basetype) >= CLASSTYPE_MAX_DEPTH (t)) |
1809 | CLASSTYPE_MAX_DEPTH (t) = CLASSTYPE_MAX_DEPTH (basetype) + 1; | |
1810 | } | |
1811 | } | |
1812 | ||
e8abc66f MS |
1813 | /* If this type has a copy constructor, force its mode to be BLKmode, and |
1814 | force its TREE_ADDRESSABLE bit to be nonzero. This will cause it to | |
1815 | be passed by invisible reference and prevent it from being returned in | |
72b7eeff MS |
1816 | a register. |
1817 | ||
1818 | Also do this if the class has BLKmode but can still be returned in | |
1819 | registers, since function_cannot_inline_p won't let us inline | |
1820 | functions returning such a type. This affects the HP-PA. */ | |
1821 | if (! TYPE_HAS_TRIVIAL_INIT_REF (t) | |
1822 | || (TYPE_MODE (t) == BLKmode && ! aggregate_value_p (t) | |
1823 | && CLASSTYPE_NON_AGGREGATE (t))) | |
8d08fdba | 1824 | { |
e8abc66f | 1825 | tree variants; |
d2e5ee5c | 1826 | DECL_MODE (TYPE_MAIN_DECL (t)) = BLKmode; |
e8abc66f | 1827 | for (variants = t; variants; variants = TYPE_NEXT_VARIANT (variants)) |
8d08fdba MS |
1828 | { |
1829 | TYPE_MODE (variants) = BLKmode; | |
1830 | TREE_ADDRESSABLE (variants) = 1; | |
8d08fdba MS |
1831 | } |
1832 | } | |
1833 | } | |
1834 | ||
fc378698 MS |
1835 | /* Add FNDECL to the method_vec growing on the class_obstack. Used by |
1836 | finish_struct_methods. Note, FNDECL cannot be a constructor or | |
1837 | destructor, those cases are handled by the caller. */ | |
e92cc029 | 1838 | |
e1cd6e56 | 1839 | static void |
fc378698 MS |
1840 | grow_method (fndecl, method_vec_ptr) |
1841 | tree fndecl; | |
8ccc31eb | 1842 | tree *method_vec_ptr; |
e1cd6e56 MS |
1843 | { |
1844 | tree method_vec = (tree)obstack_base (&class_obstack); | |
fc378698 MS |
1845 | |
1846 | /* Start off past the constructors and destructor. */ | |
1847 | tree *testp = &TREE_VEC_ELT (method_vec, 2); | |
1848 | ||
1849 | while (testp < (tree *) obstack_next_free (&class_obstack) | |
2c73f9f5 | 1850 | && (*testp == NULL_TREE || DECL_NAME (OVL_CURRENT (*testp)) != DECL_NAME (fndecl))) |
e1cd6e56 | 1851 | testp++; |
fc378698 MS |
1852 | |
1853 | if (testp < (tree *) obstack_next_free (&class_obstack)) | |
2c73f9f5 | 1854 | *testp = build_overload (fndecl, *testp); |
e1cd6e56 | 1855 | else |
8ccc31eb | 1856 | { |
fc378698 | 1857 | obstack_ptr_grow (&class_obstack, fndecl); |
8ccc31eb MS |
1858 | *method_vec_ptr = (tree)obstack_base (&class_obstack); |
1859 | } | |
e1cd6e56 MS |
1860 | } |
1861 | ||
8d08fdba MS |
1862 | /* Warn about duplicate methods in fn_fields. Also compact method |
1863 | lists so that lookup can be made faster. | |
1864 | ||
1865 | Algorithm: Outer loop builds lists by method name. Inner loop | |
1866 | checks for redundant method names within a list. | |
1867 | ||
1868 | Data Structure: List of method lists. The outer list is a | |
1869 | TREE_LIST, whose TREE_PURPOSE field is the field name and the | |
e1cd6e56 MS |
1870 | TREE_VALUE is the DECL_CHAIN of the FUNCTION_DECLs. TREE_CHAIN |
1871 | links the entire list of methods for TYPE_METHODS. Friends are | |
1872 | chained in the same way as member functions (? TREE_CHAIN or | |
1873 | DECL_CHAIN), but they live in the TREE_TYPE field of the outer | |
1874 | list. That allows them to be quickly deleted, and requires no | |
1875 | extra storage. | |
8d08fdba MS |
1876 | |
1877 | If there are any constructors/destructors, they are moved to the | |
1878 | front of the list. This makes pushclass more efficient. | |
1879 | ||
1880 | We also link each field which has shares a name with its baseclass | |
1881 | to the head of the list of fields for that base class. This allows | |
1882 | us to reduce search time in places like `build_method_call' to | |
1883 | consider only reasonably likely functions. */ | |
1884 | ||
72b7eeff | 1885 | tree |
8d08fdba MS |
1886 | finish_struct_methods (t, fn_fields, nonprivate_method) |
1887 | tree t; | |
1888 | tree fn_fields; | |
1889 | int nonprivate_method; | |
1890 | { | |
1891 | tree method_vec; | |
72b7eeff | 1892 | tree save_fn_fields = fn_fields; |
fc378698 | 1893 | tree ctor_name = constructor_name (t); |
8d08fdba MS |
1894 | int i, n_baseclasses = CLASSTYPE_N_BASECLASSES (t); |
1895 | ||
1896 | /* Now prepare to gather fn_fields into vector. */ | |
1897 | struct obstack *ambient_obstack = current_obstack; | |
1898 | current_obstack = &class_obstack; | |
fc378698 | 1899 | method_vec = make_tree_vec (2); |
8d08fdba | 1900 | current_obstack = ambient_obstack; |
fc378698 | 1901 | |
8d08fdba MS |
1902 | /* Now make this a live vector. */ |
1903 | obstack_free (&class_obstack, method_vec); | |
8d08fdba | 1904 | |
fc378698 MS |
1905 | /* Save room for constructors and destructors. */ |
1906 | obstack_blank (&class_obstack, sizeof (struct tree_vec) + sizeof (struct tree *)); | |
1907 | ||
1908 | /* First fill in entry 0 with the constructors, entry 1 with destructors, | |
1909 | and the next few with type conversion operators (if any). */ | |
e1cd6e56 | 1910 | |
72b7eeff | 1911 | for (; fn_fields; fn_fields = TREE_CHAIN (fn_fields)) |
8d08fdba | 1912 | { |
8d08fdba | 1913 | tree fn_name = DECL_NAME (fn_fields); |
8d08fdba | 1914 | |
8d08fdba MS |
1915 | /* Clear out this flag. |
1916 | ||
1917 | @@ Doug may figure out how to break | |
1918 | @@ this with nested classes and friends. */ | |
1919 | DECL_IN_AGGR_P (fn_fields) = 0; | |
1920 | ||
1921 | /* Note here that a copy ctor is private, so we don't dare generate | |
1922 | a default copy constructor for a class that has a member | |
1923 | of this type without making sure they have access to it. */ | |
fc378698 | 1924 | if (fn_name == ctor_name) |
8d08fdba MS |
1925 | { |
1926 | tree parmtypes = FUNCTION_ARG_CHAIN (fn_fields); | |
1927 | tree parmtype = parmtypes ? TREE_VALUE (parmtypes) : void_type_node; | |
1928 | ||
1929 | if (TREE_CODE (parmtype) == REFERENCE_TYPE | |
1930 | && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) == t) | |
1931 | { | |
1932 | if (TREE_CHAIN (parmtypes) == NULL_TREE | |
1933 | || TREE_CHAIN (parmtypes) == void_list_node | |
1934 | || TREE_PURPOSE (TREE_CHAIN (parmtypes))) | |
1935 | { | |
1936 | if (TREE_PROTECTED (fn_fields)) | |
1937 | TYPE_HAS_NONPUBLIC_CTOR (t) = 1; | |
1938 | else if (TREE_PRIVATE (fn_fields)) | |
1939 | TYPE_HAS_NONPUBLIC_CTOR (t) = 2; | |
1940 | } | |
1941 | } | |
fc378698 MS |
1942 | if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (fn_fields))) |
1943 | { | |
1944 | /* Destructors go in slot 1. */ | |
2c73f9f5 ML |
1945 | TREE_VEC_ELT (method_vec, 1) = |
1946 | build_overload (fn_fields, TREE_VEC_ELT (method_vec, 1)); | |
fc378698 MS |
1947 | } |
1948 | else | |
1949 | { | |
1950 | /* Constructors go in slot 0. */ | |
2c73f9f5 ML |
1951 | TREE_VEC_ELT (method_vec, 0) = |
1952 | build_overload (fn_fields, TREE_VEC_ELT (method_vec, 0)); | |
fc378698 | 1953 | } |
8d08fdba | 1954 | } |
e1cd6e56 | 1955 | else if (IDENTIFIER_TYPENAME_P (fn_name)) |
0b41abe6 | 1956 | grow_method (fn_fields, &method_vec); |
e1cd6e56 MS |
1957 | } |
1958 | ||
72b7eeff MS |
1959 | fn_fields = save_fn_fields; |
1960 | for (; fn_fields; fn_fields = TREE_CHAIN (fn_fields)) | |
e1cd6e56 | 1961 | { |
e1cd6e56 | 1962 | tree fn_name = DECL_NAME (fn_fields); |
e1cd6e56 | 1963 | |
fc378698 | 1964 | if (fn_name == ctor_name || IDENTIFIER_TYPENAME_P (fn_name)) |
72b7eeff | 1965 | continue; |
e1cd6e56 MS |
1966 | |
1967 | if (fn_name == ansi_opname[(int) MODIFY_EXPR]) | |
8d08fdba MS |
1968 | { |
1969 | tree parmtype = TREE_VALUE (FUNCTION_ARG_CHAIN (fn_fields)); | |
1970 | ||
a292b002 | 1971 | if (copy_assignment_arg_p (parmtype, DECL_VIRTUAL_P (fn_fields))) |
8d08fdba MS |
1972 | { |
1973 | if (TREE_PROTECTED (fn_fields)) | |
1974 | TYPE_HAS_NONPUBLIC_ASSIGN_REF (t) = 1; | |
1975 | else if (TREE_PRIVATE (fn_fields)) | |
1976 | TYPE_HAS_NONPUBLIC_ASSIGN_REF (t) = 2; | |
1977 | } | |
1978 | } | |
1979 | ||
8ccc31eb | 1980 | grow_method (fn_fields, &method_vec); |
8d08fdba MS |
1981 | } |
1982 | ||
1983 | TREE_VEC_LENGTH (method_vec) = (tree *)obstack_next_free (&class_obstack) | |
1984 | - (&TREE_VEC_ELT (method_vec, 0)); | |
1985 | obstack_finish (&class_obstack); | |
1986 | CLASSTYPE_METHOD_VEC (t) = method_vec; | |
1987 | ||
1988 | if (nonprivate_method == 0 | |
1989 | && CLASSTYPE_FRIEND_CLASSES (t) == NULL_TREE | |
d2e5ee5c | 1990 | && DECL_FRIENDLIST (TYPE_MAIN_DECL (t)) == NULL_TREE) |
8d08fdba MS |
1991 | { |
1992 | tree binfos = BINFO_BASETYPES (TYPE_BINFO (t)); | |
1993 | for (i = 0; i < n_baseclasses; i++) | |
1994 | if (TREE_VIA_PUBLIC (TREE_VEC_ELT (binfos, i)) | |
1995 | || TREE_VIA_PROTECTED (TREE_VEC_ELT (binfos, i))) | |
1996 | { | |
1997 | nonprivate_method = 1; | |
1998 | break; | |
1999 | } | |
42976354 BK |
2000 | if (nonprivate_method == 0 |
2001 | && warn_ctor_dtor_privacy) | |
8d08fdba MS |
2002 | cp_warning ("all member functions in class `%T' are private", t); |
2003 | } | |
2004 | ||
fc378698 MS |
2005 | /* Warn if all destructors are private (in which case this class is |
2006 | effectively unusable. */ | |
8d08fdba MS |
2007 | if (TYPE_HAS_DESTRUCTOR (t)) |
2008 | { | |
fc378698 | 2009 | tree dtor = TREE_VEC_ELT (method_vec, 1); |
8d08fdba MS |
2010 | |
2011 | /* Wild parse errors can cause this to happen. */ | |
2012 | if (dtor == NULL_TREE) | |
2013 | TYPE_HAS_DESTRUCTOR (t) = 0; | |
fc378698 MS |
2014 | else if (TREE_PRIVATE (dtor) |
2015 | && CLASSTYPE_FRIEND_CLASSES (t) == NULL_TREE | |
d2e5ee5c | 2016 | && DECL_FRIENDLIST (TYPE_MAIN_DECL (t)) == NULL_TREE |
fc378698 MS |
2017 | && warn_ctor_dtor_privacy) |
2018 | cp_warning ("`%#T' only defines a private destructor and has no friends", | |
2019 | t); | |
8d08fdba MS |
2020 | } |
2021 | ||
2022 | /* Now for each member function (except for constructors and | |
2023 | destructors), compute where member functions of the same | |
2024 | name reside in base classes. */ | |
2025 | if (n_baseclasses != 0 | |
fc378698 | 2026 | && TREE_VEC_LENGTH (method_vec) > 2) |
8d08fdba MS |
2027 | { |
2028 | int len = TREE_VEC_LENGTH (method_vec); | |
2029 | tree baselink_vec = make_tree_vec (len); | |
2030 | int any_links = 0; | |
2031 | tree baselink_binfo = build_tree_list (NULL_TREE, TYPE_BINFO (t)); | |
2032 | ||
fc378698 | 2033 | for (i = 2; i < len; i++) |
8d08fdba MS |
2034 | { |
2035 | TREE_VEC_ELT (baselink_vec, i) | |
2c73f9f5 ML |
2036 | = get_baselinks (baselink_binfo, t, |
2037 | DECL_NAME (OVL_CURRENT (TREE_VEC_ELT (method_vec, i)))); | |
8d08fdba MS |
2038 | if (TREE_VEC_ELT (baselink_vec, i) != 0) |
2039 | any_links = 1; | |
2040 | } | |
2041 | if (any_links != 0) | |
2042 | CLASSTYPE_BASELINK_VEC (t) = baselink_vec; | |
2043 | else | |
2044 | obstack_free (current_obstack, baselink_vec); | |
2045 | } | |
2046 | ||
8d08fdba MS |
2047 | return method_vec; |
2048 | } | |
2049 | ||
e92cc029 | 2050 | /* Emit error when a duplicate definition of a type is seen. Patch up. */ |
8d08fdba MS |
2051 | |
2052 | void | |
2053 | duplicate_tag_error (t) | |
2054 | tree t; | |
2055 | { | |
2056 | cp_error ("redefinition of `%#T'", t); | |
b7484fbe | 2057 | cp_error_at ("previous definition here", t); |
8d08fdba MS |
2058 | |
2059 | /* Pretend we haven't defined this type. */ | |
2060 | ||
2061 | /* All of the component_decl's were TREE_CHAINed together in the parser. | |
2062 | finish_struct_methods walks these chains and assembles all methods with | |
2063 | the same base name into DECL_CHAINs. Now we don't need the parser chains | |
e92cc029 MS |
2064 | anymore, so we unravel them. */ |
2065 | ||
2066 | /* This used to be in finish_struct, but it turns out that the | |
2067 | TREE_CHAIN is used by dbxout_type_methods and perhaps some other | |
2068 | things... */ | |
fc378698 | 2069 | if (CLASSTYPE_METHOD_VEC (t)) |
8d08fdba | 2070 | { |
fc378698 MS |
2071 | tree method_vec = CLASSTYPE_METHOD_VEC (t); |
2072 | int i, len = TREE_VEC_LENGTH (method_vec); | |
8d08fdba MS |
2073 | for (i = 0; i < len; i++) |
2074 | { | |
fc378698 | 2075 | tree unchain = TREE_VEC_ELT (method_vec, i); |
8d08fdba MS |
2076 | while (unchain != NULL_TREE) |
2077 | { | |
2c73f9f5 ML |
2078 | TREE_CHAIN (OVL_CURRENT (unchain)) = NULL_TREE; |
2079 | unchain = OVL_NEXT (unchain); | |
8d08fdba MS |
2080 | } |
2081 | } | |
2082 | } | |
2083 | ||
2084 | if (TYPE_LANG_SPECIFIC (t)) | |
2085 | { | |
2086 | tree as_list = CLASSTYPE_AS_LIST (t); | |
2087 | tree binfo = TYPE_BINFO (t); | |
2088 | tree binfo_as_list = CLASSTYPE_BINFO_AS_LIST (t); | |
2089 | int interface_only = CLASSTYPE_INTERFACE_ONLY (t); | |
2090 | int interface_unknown = CLASSTYPE_INTERFACE_UNKNOWN (t); | |
2091 | ||
1daa5dd8 | 2092 | bzero ((char *) TYPE_LANG_SPECIFIC (t), sizeof (struct lang_type)); |
8d08fdba MS |
2093 | BINFO_BASETYPES(binfo) = NULL_TREE; |
2094 | ||
2095 | CLASSTYPE_AS_LIST (t) = as_list; | |
2096 | TYPE_BINFO (t) = binfo; | |
2097 | CLASSTYPE_BINFO_AS_LIST (t) = binfo_as_list; | |
2098 | CLASSTYPE_INTERFACE_ONLY (t) = interface_only; | |
2099 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, interface_unknown); | |
8d08fdba MS |
2100 | TYPE_REDEFINED (t) = 1; |
2101 | } | |
2102 | TYPE_SIZE (t) = NULL_TREE; | |
2103 | TYPE_MODE (t) = VOIDmode; | |
2104 | TYPE_FIELDS (t) = NULL_TREE; | |
2105 | TYPE_METHODS (t) = NULL_TREE; | |
2106 | TYPE_VFIELD (t) = NULL_TREE; | |
2107 | TYPE_CONTEXT (t) = NULL_TREE; | |
2108 | } | |
2109 | ||
e92cc029 MS |
2110 | /* finish up all new vtables. */ |
2111 | ||
7177d104 MS |
2112 | static void |
2113 | finish_vtbls (binfo, do_self, t) | |
6b5fbb55 | 2114 | tree binfo; |
7177d104 | 2115 | int do_self; |
6b5fbb55 | 2116 | tree t; |
7177d104 MS |
2117 | { |
2118 | tree binfos = BINFO_BASETYPES (binfo); | |
2119 | int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2120 | ||
2121 | /* Should we use something besides CLASSTYPE_VFIELDS? */ | |
2122 | if (do_self && CLASSTYPE_VFIELDS (BINFO_TYPE (binfo))) | |
2123 | { | |
2124 | if (BINFO_NEW_VTABLE_MARKED (binfo)) | |
2125 | { | |
2126 | tree decl, context; | |
2127 | ||
2128 | decl = BINFO_VTABLE (binfo); | |
2129 | context = DECL_CONTEXT (decl); | |
2130 | DECL_CONTEXT (decl) = 0; | |
2131 | if (write_virtuals >= 0 | |
2132 | && DECL_INITIAL (decl) != BINFO_VIRTUALS (binfo)) | |
2133 | DECL_INITIAL (decl) = build_nt (CONSTRUCTOR, NULL_TREE, | |
2134 | BINFO_VIRTUALS (binfo)); | |
b3417a04 | 2135 | cp_finish_decl (decl, DECL_INITIAL (decl), NULL_TREE, 0, 0); |
7177d104 MS |
2136 | DECL_CONTEXT (decl) = context; |
2137 | } | |
2138 | CLEAR_BINFO_NEW_VTABLE_MARKED (binfo); | |
2139 | } | |
2140 | ||
2141 | for (i = 0; i < n_baselinks; i++) | |
2142 | { | |
2143 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
beb53fb8 JM |
2144 | int is_not_base_vtable |
2145 | = i != CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (binfo)); | |
7177d104 MS |
2146 | if (TREE_VIA_VIRTUAL (base_binfo)) |
2147 | { | |
2148 | base_binfo = binfo_member (BINFO_TYPE (base_binfo), CLASSTYPE_VBASECLASSES (t)); | |
2149 | } | |
44a8d0b3 | 2150 | finish_vtbls (base_binfo, is_not_base_vtable, t); |
7177d104 MS |
2151 | } |
2152 | } | |
2153 | ||
2154 | /* True if we should override the given BASE_FNDECL with the given | |
2155 | FNDECL. */ | |
e92cc029 | 2156 | |
7177d104 MS |
2157 | static int |
2158 | overrides (fndecl, base_fndecl) | |
2159 | tree fndecl, base_fndecl; | |
2160 | { | |
e92cc029 | 2161 | /* Destructors have special names. */ |
beb53fb8 JM |
2162 | if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (base_fndecl)) |
2163 | && DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (fndecl))) | |
7177d104 | 2164 | return 1; |
beb53fb8 JM |
2165 | if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (base_fndecl)) |
2166 | || DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (fndecl))) | |
7177d104 MS |
2167 | return 0; |
2168 | if (DECL_NAME (fndecl) == DECL_NAME (base_fndecl)) | |
2169 | { | |
5566b478 | 2170 | tree types, base_types; |
7177d104 MS |
2171 | #if 0 |
2172 | retypes = TREE_TYPE (TREE_TYPE (fndecl)); | |
2173 | base_retypes = TREE_TYPE (TREE_TYPE (base_fndecl)); | |
2174 | #endif | |
2175 | types = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); | |
2176 | base_types = TYPE_ARG_TYPES (TREE_TYPE (base_fndecl)); | |
2177 | if ((TYPE_READONLY (TREE_TYPE (TREE_VALUE (base_types))) | |
2178 | == TYPE_READONLY (TREE_TYPE (TREE_VALUE (types)))) | |
2179 | && compparms (TREE_CHAIN (base_types), TREE_CHAIN (types), 3)) | |
2180 | return 1; | |
2181 | } | |
2182 | return 0; | |
2183 | } | |
2184 | ||
a292b002 MS |
2185 | static tree |
2186 | get_class_offset_1 (parent, binfo, context, t, fndecl) | |
2187 | tree parent, binfo, context, t, fndecl; | |
2188 | { | |
2189 | tree binfos = BINFO_BASETYPES (binfo); | |
2190 | int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2191 | tree rval = NULL_TREE; | |
2192 | ||
2193 | if (binfo == parent) | |
2194 | return error_mark_node; | |
2195 | ||
2196 | for (i = 0; i < n_baselinks; i++) | |
2197 | { | |
2198 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
2199 | tree nrval; | |
2200 | ||
2201 | if (TREE_VIA_VIRTUAL (base_binfo)) | |
2202 | base_binfo = binfo_member (BINFO_TYPE (base_binfo), | |
2203 | CLASSTYPE_VBASECLASSES (t)); | |
2204 | nrval = get_class_offset_1 (parent, base_binfo, context, t, fndecl); | |
2205 | /* See if we have a new value */ | |
2206 | if (nrval && (nrval != error_mark_node || rval==0)) | |
2207 | { | |
2208 | /* Only compare if we have two offsets */ | |
2209 | if (rval && rval != error_mark_node | |
2210 | && ! tree_int_cst_equal (nrval, rval)) | |
2211 | { | |
2212 | /* Only give error if the two offsets are different */ | |
2213 | error ("every virtual function must have a unique final overrider"); | |
2214 | cp_error (" found two (or more) `%T' class subobjects in `%T'", context, t); | |
2215 | cp_error (" with virtual `%D' from virtual base class", fndecl); | |
2216 | return rval; | |
2217 | } | |
2218 | rval = nrval; | |
2219 | } | |
2220 | ||
2221 | if (rval && BINFO_TYPE (binfo) == context) | |
2222 | { | |
2223 | my_friendly_assert (rval == error_mark_node | |
2224 | || tree_int_cst_equal (rval, BINFO_OFFSET (binfo)), 999); | |
2225 | rval = BINFO_OFFSET (binfo); | |
2226 | } | |
2227 | } | |
2228 | return rval; | |
2229 | } | |
2230 | ||
2231 | /* Get the offset to the CONTEXT subobject that is related to the | |
2232 | given BINFO. */ | |
e92cc029 | 2233 | |
a292b002 MS |
2234 | static tree |
2235 | get_class_offset (context, t, binfo, fndecl) | |
2236 | tree context, t, binfo, fndecl; | |
2237 | { | |
2238 | tree first_binfo = binfo; | |
2239 | tree offset; | |
2240 | int i; | |
2241 | ||
2242 | if (context == t) | |
2243 | return integer_zero_node; | |
2244 | ||
2245 | if (BINFO_TYPE (binfo) == context) | |
2246 | return BINFO_OFFSET (binfo); | |
2247 | ||
2248 | /* Check less derived binfos first. */ | |
2249 | while (BINFO_BASETYPES (binfo) | |
2250 | && (i=CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (binfo))) != -1) | |
2251 | { | |
2252 | tree binfos = BINFO_BASETYPES (binfo); | |
2253 | binfo = TREE_VEC_ELT (binfos, i); | |
2254 | if (BINFO_TYPE (binfo) == context) | |
2255 | return BINFO_OFFSET (binfo); | |
2256 | } | |
2257 | ||
2258 | /* Ok, not found in the less derived binfos, now check the more | |
e92cc029 | 2259 | derived binfos. */ |
a292b002 MS |
2260 | offset = get_class_offset_1 (first_binfo, TYPE_BINFO (t), context, t, fndecl); |
2261 | if (offset==0 || TREE_CODE (offset) != INTEGER_CST) | |
2262 | my_friendly_abort (999); /* we have to find it. */ | |
2263 | return offset; | |
2264 | } | |
2265 | ||
f30432d7 | 2266 | /* Skip RTTI information at the front of the virtual list. */ |
e92cc029 | 2267 | |
f30432d7 MS |
2268 | unsigned HOST_WIDE_INT |
2269 | skip_rtti_stuff (virtuals) | |
2270 | tree *virtuals; | |
2271 | { | |
2272 | int n; | |
2273 | ||
2274 | n = 0; | |
2275 | if (*virtuals) | |
2276 | { | |
2277 | /* We always reserve a slot for the offset/tdesc entry. */ | |
2278 | ++n; | |
2279 | *virtuals = TREE_CHAIN (*virtuals); | |
2280 | } | |
2281 | if (flag_vtable_thunks && *virtuals) | |
2282 | { | |
2283 | /* The second slot is reserved for the tdesc pointer when thunks | |
2284 | are used. */ | |
2285 | ++n; | |
2286 | *virtuals = TREE_CHAIN (*virtuals); | |
2287 | } | |
2288 | return n; | |
2289 | } | |
2290 | ||
7177d104 MS |
2291 | static void |
2292 | modify_one_vtable (binfo, t, fndecl, pfn) | |
2293 | tree binfo, t, fndecl, pfn; | |
2294 | { | |
39211cd5 | 2295 | tree virtuals = BINFO_VIRTUALS (binfo); |
7177d104 MS |
2296 | unsigned HOST_WIDE_INT n; |
2297 | ||
db5ae43f MS |
2298 | /* update rtti entry */ |
2299 | if (flag_rtti) | |
2300 | { | |
2301 | if (binfo == TYPE_BINFO (t)) | |
2302 | { | |
2303 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2304 | build_vtable (TYPE_BINFO (DECL_CONTEXT (CLASSTYPE_VFIELD (t))), t); | |
2305 | } | |
2306 | else | |
2307 | { | |
2308 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2309 | prepare_fresh_vtable (binfo, t); | |
2310 | } | |
db5ae43f | 2311 | } |
f30432d7 MS |
2312 | if (fndecl == NULL_TREE) |
2313 | return; | |
2314 | ||
2315 | n = skip_rtti_stuff (&virtuals); | |
db5ae43f | 2316 | |
7177d104 MS |
2317 | while (virtuals) |
2318 | { | |
2319 | tree current_fndecl = TREE_VALUE (virtuals); | |
2320 | current_fndecl = FNADDR_FROM_VTABLE_ENTRY (current_fndecl); | |
2321 | current_fndecl = TREE_OPERAND (current_fndecl, 0); | |
2322 | if (current_fndecl && overrides (fndecl, current_fndecl)) | |
2323 | { | |
2324 | tree base_offset, offset; | |
2325 | tree context = DECL_CLASS_CONTEXT (fndecl); | |
2326 | tree vfield = CLASSTYPE_VFIELD (t); | |
2327 | tree this_offset; | |
2328 | ||
a292b002 | 2329 | offset = get_class_offset (context, t, binfo, fndecl); |
7177d104 | 2330 | |
2986ae00 MS |
2331 | /* Find the right offset for the this pointer based on the |
2332 | base class we just found. We have to take into | |
2333 | consideration the virtual base class pointers that we | |
a0a33927 MS |
2334 | stick in before the virtual function table pointer. |
2335 | ||
ddd5a7c1 | 2336 | Also, we want just the delta between the most base class |
a0a33927 MS |
2337 | that we derived this vfield from and us. */ |
2338 | base_offset = size_binop (PLUS_EXPR, | |
13306d4f | 2339 | get_derived_offset (binfo, DECL_CONTEXT (current_fndecl)), |
a0a33927 | 2340 | BINFO_OFFSET (binfo)); |
7177d104 MS |
2341 | this_offset = size_binop (MINUS_EXPR, offset, base_offset); |
2342 | ||
2343 | /* Make sure we can modify the derived association with immunity. */ | |
8ccc31eb | 2344 | if (TREE_USED (binfo)) |
7177d104 | 2345 | my_friendly_assert (0, 999); |
8ccc31eb | 2346 | |
7177d104 MS |
2347 | if (binfo == TYPE_BINFO (t)) |
2348 | { | |
2349 | /* In this case, it is *type*'s vtable we are modifying. | |
2350 | We start with the approximation that it's vtable is that | |
2351 | of the immediate base class. */ | |
2352 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2353 | build_vtable (TYPE_BINFO (DECL_CONTEXT (vfield)), t); | |
2354 | } | |
2355 | else | |
2356 | { | |
2357 | /* This is our very own copy of `basetype' to play with. | |
2358 | Later, we will fill in all the virtual functions | |
2359 | that override the virtual functions in these base classes | |
2360 | which are not defined by the current type. */ | |
2361 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2362 | prepare_fresh_vtable (binfo, t); | |
2363 | } | |
2364 | ||
2365 | #ifdef NOTQUITE | |
2366 | cp_warning ("in %D", DECL_NAME (BINFO_VTABLE (binfo))); | |
2367 | #endif | |
2368 | modify_vtable_entry (get_vtable_entry_n (BINFO_VIRTUALS (binfo), n), | |
2369 | build_vtable_entry (this_offset, pfn), | |
2370 | fndecl); | |
2371 | } | |
2372 | ++n; | |
2373 | virtuals = TREE_CHAIN (virtuals); | |
2374 | } | |
2375 | } | |
2376 | ||
e92cc029 MS |
2377 | /* These are the ones that are not through virtual base classes. */ |
2378 | ||
7177d104 MS |
2379 | static void |
2380 | modify_all_direct_vtables (binfo, do_self, t, fndecl, pfn) | |
6b5fbb55 | 2381 | tree binfo; |
7177d104 | 2382 | int do_self; |
6b5fbb55 | 2383 | tree t, fndecl, pfn; |
7177d104 MS |
2384 | { |
2385 | tree binfos = BINFO_BASETYPES (binfo); | |
2386 | int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2387 | ||
2388 | /* Should we use something besides CLASSTYPE_VFIELDS? */ | |
2389 | if (do_self && CLASSTYPE_VFIELDS (BINFO_TYPE (binfo))) | |
2390 | { | |
2391 | modify_one_vtable (binfo, t, fndecl, pfn); | |
2392 | } | |
2393 | ||
2394 | for (i = 0; i < n_baselinks; i++) | |
2395 | { | |
2396 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
beb53fb8 JM |
2397 | int is_not_base_vtable |
2398 | = i != CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (binfo)); | |
7177d104 | 2399 | if (! TREE_VIA_VIRTUAL (base_binfo)) |
44a8d0b3 | 2400 | modify_all_direct_vtables (base_binfo, is_not_base_vtable, t, fndecl, pfn); |
7177d104 MS |
2401 | } |
2402 | } | |
2403 | ||
43f2999d | 2404 | /* Fixup all the delta entries in this one vtable that need updating. */ |
e92cc029 | 2405 | |
21474714 | 2406 | static void |
43f2999d | 2407 | fixup_vtable_deltas1 (binfo, t) |
21474714 MS |
2408 | tree binfo, t; |
2409 | { | |
2410 | tree virtuals = BINFO_VIRTUALS (binfo); | |
2411 | unsigned HOST_WIDE_INT n; | |
2412 | ||
f30432d7 MS |
2413 | n = skip_rtti_stuff (&virtuals); |
2414 | ||
21474714 MS |
2415 | while (virtuals) |
2416 | { | |
2417 | tree fndecl = TREE_VALUE (virtuals); | |
2418 | tree pfn = FNADDR_FROM_VTABLE_ENTRY (fndecl); | |
2419 | tree delta = DELTA_FROM_VTABLE_ENTRY (fndecl); | |
2420 | fndecl = TREE_OPERAND (pfn, 0); | |
2421 | if (fndecl) | |
2422 | { | |
2423 | tree base_offset, offset; | |
2424 | tree context = DECL_CLASS_CONTEXT (fndecl); | |
2425 | tree vfield = CLASSTYPE_VFIELD (t); | |
2426 | tree this_offset; | |
2427 | ||
a292b002 | 2428 | offset = get_class_offset (context, t, binfo, fndecl); |
21474714 MS |
2429 | |
2430 | /* Find the right offset for the this pointer based on the | |
2431 | base class we just found. We have to take into | |
2432 | consideration the virtual base class pointers that we | |
2433 | stick in before the virtual function table pointer. | |
2434 | ||
ddd5a7c1 | 2435 | Also, we want just the delta between the most base class |
21474714 MS |
2436 | that we derived this vfield from and us. */ |
2437 | base_offset = size_binop (PLUS_EXPR, | |
13306d4f | 2438 | get_derived_offset (binfo, DECL_CONTEXT (fndecl)), |
21474714 MS |
2439 | BINFO_OFFSET (binfo)); |
2440 | this_offset = size_binop (MINUS_EXPR, offset, base_offset); | |
2441 | ||
2442 | if (! tree_int_cst_equal (this_offset, delta)) | |
2443 | { | |
2444 | /* Make sure we can modify the derived association with immunity. */ | |
2445 | if (TREE_USED (binfo)) | |
2446 | my_friendly_assert (0, 999); | |
2447 | ||
2448 | if (binfo == TYPE_BINFO (t)) | |
2449 | { | |
2450 | /* In this case, it is *type*'s vtable we are modifying. | |
2451 | We start with the approximation that it's vtable is that | |
2452 | of the immediate base class. */ | |
2453 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2454 | build_vtable (TYPE_BINFO (DECL_CONTEXT (vfield)), t); | |
2455 | } | |
2456 | else | |
2457 | { | |
2458 | /* This is our very own copy of `basetype' to play with. | |
2459 | Later, we will fill in all the virtual functions | |
2460 | that override the virtual functions in these base classes | |
2461 | which are not defined by the current type. */ | |
2462 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2463 | prepare_fresh_vtable (binfo, t); | |
2464 | } | |
2465 | ||
2466 | modify_vtable_entry (get_vtable_entry_n (BINFO_VIRTUALS (binfo), n), | |
2467 | build_vtable_entry (this_offset, pfn), | |
2468 | fndecl); | |
2469 | } | |
2470 | } | |
2471 | ++n; | |
2472 | virtuals = TREE_CHAIN (virtuals); | |
2473 | } | |
2474 | } | |
2475 | ||
43f2999d MS |
2476 | /* Fixup all the delta entries in all the direct vtables that need updating. |
2477 | This happens when we have non-overridden virtual functions from a | |
2478 | virtual base class, that are at a different offset, in the new | |
2479 | hierarchy, because the layout of the virtual bases has changed. */ | |
e92cc029 | 2480 | |
43f2999d MS |
2481 | static void |
2482 | fixup_vtable_deltas (binfo, init_self, t) | |
6b5fbb55 | 2483 | tree binfo; |
43f2999d | 2484 | int init_self; |
6b5fbb55 | 2485 | tree t; |
43f2999d MS |
2486 | { |
2487 | tree binfos = BINFO_BASETYPES (binfo); | |
2488 | int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2489 | ||
2490 | for (i = 0; i < n_baselinks; i++) | |
2491 | { | |
2492 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
beb53fb8 JM |
2493 | int is_not_base_vtable |
2494 | = i != CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (binfo)); | |
43f2999d MS |
2495 | if (! TREE_VIA_VIRTUAL (base_binfo)) |
2496 | fixup_vtable_deltas (base_binfo, is_not_base_vtable, t); | |
2497 | } | |
2498 | /* Should we use something besides CLASSTYPE_VFIELDS? */ | |
2499 | if (init_self && CLASSTYPE_VFIELDS (BINFO_TYPE (binfo))) | |
2500 | { | |
2501 | fixup_vtable_deltas1 (binfo, t); | |
2502 | } | |
2503 | } | |
2504 | ||
e92cc029 MS |
2505 | /* These are the ones that are through virtual base classes. */ |
2506 | ||
7177d104 MS |
2507 | static void |
2508 | modify_all_indirect_vtables (binfo, do_self, via_virtual, t, fndecl, pfn) | |
6b5fbb55 | 2509 | tree binfo; |
7177d104 | 2510 | int do_self, via_virtual; |
6b5fbb55 | 2511 | tree t, fndecl, pfn; |
7177d104 MS |
2512 | { |
2513 | tree binfos = BINFO_BASETYPES (binfo); | |
2514 | int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2515 | ||
2516 | /* Should we use something besides CLASSTYPE_VFIELDS? */ | |
2517 | if (do_self && via_virtual && CLASSTYPE_VFIELDS (BINFO_TYPE (binfo))) | |
2518 | { | |
2519 | modify_one_vtable (binfo, t, fndecl, pfn); | |
2520 | } | |
2521 | ||
2522 | for (i = 0; i < n_baselinks; i++) | |
2523 | { | |
2524 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
beb53fb8 JM |
2525 | int is_not_base_vtable |
2526 | = i != CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (binfo)); | |
7177d104 MS |
2527 | if (TREE_VIA_VIRTUAL (base_binfo)) |
2528 | { | |
2529 | via_virtual = 1; | |
2530 | base_binfo = binfo_member (BINFO_TYPE (base_binfo), CLASSTYPE_VBASECLASSES (t)); | |
2531 | } | |
2532 | modify_all_indirect_vtables (base_binfo, is_not_base_vtable, via_virtual, t, fndecl, pfn); | |
2533 | } | |
2534 | } | |
2535 | ||
2536 | static void | |
2537 | modify_all_vtables (t, fndecl, vfn) | |
2538 | tree t, fndecl, vfn; | |
2539 | { | |
2540 | /* Do these first, so that we will make use of any non-virtual class's | |
e92cc029 | 2541 | vtable, over a virtual classes vtable. */ |
7177d104 MS |
2542 | modify_all_direct_vtables (TYPE_BINFO (t), 1, t, fndecl, vfn); |
2543 | if (TYPE_USES_VIRTUAL_BASECLASSES (t)) | |
2544 | modify_all_indirect_vtables (TYPE_BINFO (t), 1, 0, t, fndecl, vfn); | |
2545 | } | |
2546 | ||
39211cd5 MS |
2547 | /* Here, we already know that they match in every respect. |
2548 | All we have to check is where they had their declarations. */ | |
e92cc029 | 2549 | |
39211cd5 MS |
2550 | static int |
2551 | strictly_overrides (fndecl1, fndecl2) | |
2552 | tree fndecl1, fndecl2; | |
2553 | { | |
2554 | int distance = get_base_distance (DECL_CLASS_CONTEXT (fndecl2), | |
2555 | DECL_CLASS_CONTEXT (fndecl1), | |
2556 | 0, (tree *)0); | |
2557 | if (distance == -2 || distance > 0) | |
2558 | return 1; | |
2559 | return 0; | |
2560 | } | |
2561 | ||
2562 | /* Merge overrides for one vtable. | |
2563 | If we want to merge in same function, we are fine. | |
2564 | else | |
2565 | if one has a DECL_CLASS_CONTEXT that is a parent of the | |
2566 | other, than choose the more derived one | |
2567 | else | |
2568 | potentially ill-formed (see 10.3 [class.virtual]) | |
2569 | we have to check later to see if there was an | |
2570 | override in this class. If there was ok, if not | |
2571 | then it is ill-formed. (mrs) | |
2572 | ||
2573 | We take special care to reuse a vtable, if we can. */ | |
e92cc029 | 2574 | |
39211cd5 MS |
2575 | static void |
2576 | override_one_vtable (binfo, old, t) | |
2577 | tree binfo, old, t; | |
2578 | { | |
2579 | tree virtuals = BINFO_VIRTUALS (binfo); | |
2580 | tree old_virtuals = BINFO_VIRTUALS (old); | |
2581 | enum { REUSE_NEW, REUSE_OLD, UNDECIDED, NEITHER } choose = UNDECIDED; | |
2582 | ||
2583 | /* If we have already committed to modifying it, then don't try and | |
e92cc029 | 2584 | reuse another vtable. */ |
39211cd5 MS |
2585 | if (BINFO_NEW_VTABLE_MARKED (binfo)) |
2586 | choose = NEITHER; | |
2587 | ||
f30432d7 MS |
2588 | skip_rtti_stuff (&virtuals); |
2589 | skip_rtti_stuff (&old_virtuals); | |
39211cd5 MS |
2590 | |
2591 | while (virtuals) | |
2592 | { | |
2593 | tree fndecl = TREE_VALUE (virtuals); | |
2594 | tree old_fndecl = TREE_VALUE (old_virtuals); | |
2595 | fndecl = FNADDR_FROM_VTABLE_ENTRY (fndecl); | |
2596 | old_fndecl = FNADDR_FROM_VTABLE_ENTRY (old_fndecl); | |
2597 | fndecl = TREE_OPERAND (fndecl, 0); | |
2598 | old_fndecl = TREE_OPERAND (old_fndecl, 0); | |
e92cc029 | 2599 | /* First check to see if they are the same. */ |
39211cd5 MS |
2600 | if (DECL_ASSEMBLER_NAME (fndecl) == DECL_ASSEMBLER_NAME (old_fndecl)) |
2601 | { | |
e92cc029 | 2602 | /* No need to do anything. */ |
39211cd5 MS |
2603 | } |
2604 | else if (strictly_overrides (fndecl, old_fndecl)) | |
2605 | { | |
2606 | if (choose == UNDECIDED) | |
2607 | choose = REUSE_NEW; | |
2608 | else if (choose == REUSE_OLD) | |
2609 | { | |
2610 | choose = NEITHER; | |
2611 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2612 | { | |
2613 | prepare_fresh_vtable (binfo, t); | |
2614 | override_one_vtable (binfo, old, t); | |
2615 | return; | |
2616 | } | |
2617 | } | |
2618 | } | |
2619 | else if (strictly_overrides (old_fndecl, fndecl)) | |
2620 | { | |
2621 | if (choose == UNDECIDED) | |
2622 | choose = REUSE_OLD; | |
2623 | else if (choose == REUSE_NEW) | |
2624 | { | |
2625 | choose = NEITHER; | |
2626 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2627 | { | |
2628 | prepare_fresh_vtable (binfo, t); | |
2629 | override_one_vtable (binfo, old, t); | |
2630 | return; | |
2631 | } | |
a0a33927 | 2632 | TREE_VALUE (virtuals) = TREE_VALUE (old_virtuals); |
39211cd5 | 2633 | } |
a3203465 MS |
2634 | else if (choose == NEITHER) |
2635 | { | |
2636 | TREE_VALUE (virtuals) = TREE_VALUE (old_virtuals); | |
2637 | } | |
39211cd5 MS |
2638 | } |
2639 | else | |
2640 | { | |
2641 | choose = NEITHER; | |
2642 | if (! BINFO_NEW_VTABLE_MARKED (binfo)) | |
2643 | { | |
2644 | prepare_fresh_vtable (binfo, t); | |
2645 | override_one_vtable (binfo, old, t); | |
2646 | return; | |
2647 | } | |
2648 | { | |
ddd5a7c1 | 2649 | /* This MUST be overridden, or the class is ill-formed. */ |
39211cd5 MS |
2650 | /* For now, we just make it abstract. */ |
2651 | tree fndecl = TREE_OPERAND (FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (virtuals)), 0); | |
2652 | tree vfn; | |
2653 | ||
2654 | fndecl = copy_node (fndecl); | |
2655 | copy_lang_decl (fndecl); | |
2656 | DECL_ABSTRACT_VIRTUAL_P (fndecl) = 1; | |
4a67c9e9 | 2657 | DECL_NEEDS_FINAL_OVERRIDER_P (fndecl) = 1; |
e92cc029 | 2658 | /* Make sure we search for it later. */ |
39211cd5 MS |
2659 | if (! CLASSTYPE_ABSTRACT_VIRTUALS (t)) |
2660 | CLASSTYPE_ABSTRACT_VIRTUALS (t) = error_mark_node; | |
2661 | ||
700f8a87 | 2662 | vfn = build1 (ADDR_EXPR, vfunc_ptr_type_node, fndecl); |
39211cd5 MS |
2663 | TREE_CONSTANT (vfn) = 1; |
2664 | ||
38e01259 | 2665 | /* We can use integer_zero_node, as we will core dump |
e92cc029 | 2666 | if this is used anyway. */ |
39211cd5 MS |
2667 | TREE_VALUE (virtuals) = build_vtable_entry (integer_zero_node, vfn); |
2668 | } | |
2669 | } | |
2670 | virtuals = TREE_CHAIN (virtuals); | |
2671 | old_virtuals = TREE_CHAIN (old_virtuals); | |
2672 | } | |
2673 | ||
e92cc029 | 2674 | /* Let's reuse the old vtable. */ |
39211cd5 MS |
2675 | if (choose == REUSE_OLD) |
2676 | { | |
2677 | BINFO_VTABLE (binfo) = BINFO_VTABLE (old); | |
2678 | BINFO_VIRTUALS (binfo) = BINFO_VIRTUALS (old); | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | /* Merge in overrides for virtual bases. | |
2683 | BINFO is the hierarchy we want to modify, and OLD has the potential | |
2684 | overrides. */ | |
e92cc029 | 2685 | |
39211cd5 MS |
2686 | static void |
2687 | merge_overrides (binfo, old, do_self, t) | |
6b5fbb55 | 2688 | tree binfo, old; |
39211cd5 | 2689 | int do_self; |
6b5fbb55 | 2690 | tree t; |
39211cd5 MS |
2691 | { |
2692 | tree binfos = BINFO_BASETYPES (binfo); | |
2693 | tree old_binfos = BINFO_BASETYPES (old); | |
2694 | int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2695 | ||
2696 | /* Should we use something besides CLASSTYPE_VFIELDS? */ | |
2697 | if (do_self && CLASSTYPE_VFIELDS (BINFO_TYPE (binfo))) | |
2698 | { | |
2699 | override_one_vtable (binfo, old, t); | |
2700 | } | |
2701 | ||
2702 | for (i = 0; i < n_baselinks; i++) | |
2703 | { | |
2704 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
2705 | tree old_base_binfo = TREE_VEC_ELT (old_binfos, i); | |
beb53fb8 JM |
2706 | int is_not_base_vtable |
2707 | = i != CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (binfo)); | |
39211cd5 MS |
2708 | if (! TREE_VIA_VIRTUAL (base_binfo)) |
2709 | merge_overrides (base_binfo, old_base_binfo, is_not_base_vtable, t); | |
2710 | } | |
2711 | } | |
2712 | ||
9e9ff709 MS |
2713 | /* Get the base virtual function declarations in T that are either |
2714 | overridden or hidden by FNDECL as a list. We set TREE_PURPOSE with | |
2715 | the overrider/hider. */ | |
e92cc029 | 2716 | |
5ddc28a5 | 2717 | static tree |
9e9ff709 MS |
2718 | get_basefndecls (fndecl, t) |
2719 | tree fndecl, t; | |
2720 | { | |
2721 | tree methods = TYPE_METHODS (t); | |
2722 | tree base_fndecls = NULL_TREE; | |
2723 | tree binfos = BINFO_BASETYPES (TYPE_BINFO (t)); | |
2724 | int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2725 | ||
2726 | while (methods) | |
2727 | { | |
9e9ff709 MS |
2728 | if (TREE_CODE (methods) == FUNCTION_DECL |
2729 | && DECL_VINDEX (methods) != NULL_TREE | |
2730 | && DECL_NAME (fndecl) == DECL_NAME (methods)) | |
2731 | base_fndecls = temp_tree_cons (fndecl, methods, base_fndecls); | |
2732 | ||
2733 | methods = TREE_CHAIN (methods); | |
2734 | } | |
2735 | ||
2736 | if (base_fndecls) | |
2737 | return base_fndecls; | |
2738 | ||
2739 | for (i = 0; i < n_baseclasses; i++) | |
2740 | { | |
2741 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
2742 | tree basetype = BINFO_TYPE (base_binfo); | |
9e9ff709 MS |
2743 | |
2744 | base_fndecls = chainon (get_basefndecls (fndecl, basetype), | |
2745 | base_fndecls); | |
2746 | } | |
2747 | ||
2748 | return base_fndecls; | |
2749 | } | |
2750 | ||
2751 | /* Mark the functions that have been hidden with their overriders. | |
2752 | Since we start out with all functions already marked with a hider, | |
2753 | no need to mark functions that are just hidden. */ | |
e92cc029 | 2754 | |
bd6dd845 | 2755 | static void |
9e9ff709 MS |
2756 | mark_overriders (fndecl, base_fndecls) |
2757 | tree fndecl, base_fndecls; | |
2758 | { | |
2759 | while (base_fndecls) | |
2760 | { | |
2761 | if (overrides (TREE_VALUE (base_fndecls), fndecl)) | |
2762 | TREE_PURPOSE (base_fndecls) = fndecl; | |
2763 | ||
2764 | base_fndecls = TREE_CHAIN (base_fndecls); | |
2765 | } | |
2766 | } | |
2767 | ||
2ee887f2 MS |
2768 | /* If this declaration supersedes the declaration of |
2769 | a method declared virtual in the base class, then | |
2770 | mark this field as being virtual as well. */ | |
2771 | ||
bd6dd845 | 2772 | static void |
cffa8729 | 2773 | check_for_override (decl, ctype) |
2ee887f2 MS |
2774 | tree decl, ctype; |
2775 | { | |
2776 | tree binfos = BINFO_BASETYPES (TYPE_BINFO (ctype)); | |
2777 | int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2778 | int virtualp = DECL_VIRTUAL_P (decl); | |
2779 | ||
2780 | for (i = 0; i < n_baselinks; i++) | |
2781 | { | |
2782 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
2783 | if (TYPE_VIRTUAL_P (BINFO_TYPE (base_binfo)) | |
2784 | || flag_all_virtual == 1) | |
2785 | { | |
2786 | tree tmp = get_matching_virtual | |
2787 | (base_binfo, decl, | |
2788 | DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl))); | |
2789 | if (tmp) | |
2790 | { | |
2791 | /* If this function overrides some virtual in some base | |
2792 | class, then the function itself is also necessarily | |
2793 | virtual, even if the user didn't explicitly say so. */ | |
2794 | DECL_VIRTUAL_P (decl) = 1; | |
2795 | ||
2796 | /* The TMP we really want is the one from the deepest | |
2797 | baseclass on this path, taking care not to | |
2798 | duplicate if we have already found it (via another | |
2799 | path to its virtual baseclass. */ | |
2800 | if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE) | |
2801 | { | |
2802 | cp_error_at ("method `%D' may not be declared static", | |
2803 | decl); | |
2804 | cp_error_at ("(since `%D' declared virtual in base class.)", | |
2805 | tmp); | |
2806 | break; | |
2807 | } | |
2808 | virtualp = 1; | |
2809 | ||
eb66be0e | 2810 | #if 0 /* The signature of an overriding function is not changed. */ |
2ee887f2 | 2811 | { |
e92cc029 | 2812 | /* The argument types may have changed... */ |
2ee887f2 MS |
2813 | tree type = TREE_TYPE (decl); |
2814 | tree argtypes = TYPE_ARG_TYPES (type); | |
2815 | tree base_variant = TREE_TYPE (TREE_VALUE (argtypes)); | |
2816 | tree raises = TYPE_RAISES_EXCEPTIONS (type); | |
2817 | ||
2818 | argtypes = commonparms (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (tmp))), | |
2819 | TREE_CHAIN (argtypes)); | |
2820 | /* But the return type has not. */ | |
2821 | type = build_cplus_method_type (base_variant, TREE_TYPE (type), argtypes); | |
2822 | if (raises) | |
2823 | type = build_exception_variant (type, raises); | |
2824 | TREE_TYPE (decl) = type; | |
2ee887f2 | 2825 | } |
eb66be0e MS |
2826 | #endif |
2827 | DECL_VINDEX (decl) | |
2828 | = tree_cons (NULL_TREE, tmp, DECL_VINDEX (decl)); | |
2ee887f2 MS |
2829 | break; |
2830 | } | |
2831 | } | |
2832 | } | |
2833 | if (virtualp) | |
2834 | { | |
2835 | if (DECL_VINDEX (decl) == NULL_TREE) | |
2836 | DECL_VINDEX (decl) = error_mark_node; | |
2837 | IDENTIFIER_VIRTUAL_P (DECL_NAME (decl)) = 1; | |
2838 | } | |
2839 | } | |
2840 | ||
fc378698 MS |
2841 | /* Warn about hidden virtual functions that are not overridden in t. |
2842 | We know that constructors and destructors don't apply. */ | |
e92cc029 | 2843 | |
9e9ff709 MS |
2844 | void |
2845 | warn_hidden (t) | |
2846 | tree t; | |
2847 | { | |
2848 | tree method_vec = CLASSTYPE_METHOD_VEC (t); | |
2849 | int n_methods = method_vec ? TREE_VEC_LENGTH (method_vec) : 0; | |
2850 | int i; | |
2851 | ||
2852 | /* We go through each separately named virtual function. */ | |
fc378698 | 2853 | for (i = 2; i < n_methods; ++i) |
9e9ff709 MS |
2854 | { |
2855 | tree fndecl = TREE_VEC_ELT (method_vec, i); | |
2856 | ||
2857 | tree base_fndecls = NULL_TREE; | |
2858 | tree binfos = BINFO_BASETYPES (TYPE_BINFO (t)); | |
2859 | int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
2860 | ||
2861 | if (DECL_VINDEX (fndecl) == NULL_TREE) | |
2862 | continue; | |
2863 | ||
2864 | /* First we get a list of all possible functions that might be | |
2865 | hidden from each base class. */ | |
2866 | for (i = 0; i < n_baseclasses; i++) | |
2867 | { | |
2868 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
2869 | tree basetype = BINFO_TYPE (base_binfo); | |
2870 | ||
2871 | base_fndecls = chainon (get_basefndecls (fndecl, basetype), | |
2872 | base_fndecls); | |
2873 | } | |
2874 | ||
2875 | if (TREE_CHAIN (fndecl) | |
2876 | && DECL_NAME (TREE_CHAIN (fndecl)) == DECL_NAME (fndecl)) | |
2877 | fndecl = TREE_CHAIN (fndecl); | |
2878 | else | |
2879 | fndecl = NULL_TREE; | |
2880 | ||
2881 | /* ...then mark up all the base functions with overriders, preferring | |
2882 | overriders to hiders. */ | |
2883 | if (base_fndecls) | |
2884 | while (fndecl) | |
2885 | { | |
2886 | mark_overriders (fndecl, base_fndecls); | |
2887 | ||
2888 | if (TREE_CHAIN (fndecl) | |
2889 | && DECL_NAME (TREE_CHAIN (fndecl)) == DECL_NAME (fndecl)) | |
2890 | fndecl = TREE_CHAIN (fndecl); | |
2891 | else | |
2892 | fndecl = NULL_TREE; | |
2893 | } | |
2894 | ||
2895 | /* Now give a warning for all base functions without overriders, | |
2896 | as they are hidden. */ | |
2897 | while (base_fndecls) | |
2898 | { | |
2899 | if (! overrides (TREE_VALUE (base_fndecls), | |
2900 | TREE_PURPOSE (base_fndecls))) | |
2901 | { | |
2902 | /* Here we know it is a hider, and no overrider exists. */ | |
2903 | cp_warning_at ("`%D' was hidden", TREE_VALUE (base_fndecls)); | |
2904 | cp_warning_at (" by `%D'", TREE_PURPOSE (base_fndecls)); | |
2905 | } | |
2906 | ||
2907 | base_fndecls = TREE_CHAIN (base_fndecls); | |
2908 | } | |
2909 | } | |
2910 | } | |
2911 | ||
2912 | /* Check for things that are invalid. There are probably plenty of other | |
2913 | things we should check for also. */ | |
e92cc029 | 2914 | |
9e9ff709 MS |
2915 | static void |
2916 | finish_struct_anon (t) | |
2917 | tree t; | |
2918 | { | |
2919 | tree field; | |
2920 | for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field)) | |
2921 | { | |
2922 | if (TREE_STATIC (field)) | |
2923 | continue; | |
2924 | if (TREE_CODE (field) != FIELD_DECL) | |
2925 | continue; | |
2926 | ||
2927 | if (DECL_NAME (field) == NULL_TREE | |
2928 | && TREE_CODE (TREE_TYPE (field)) == UNION_TYPE) | |
2929 | { | |
2930 | tree* uelt = &TYPE_FIELDS (TREE_TYPE (field)); | |
2931 | for (; *uelt; uelt = &TREE_CHAIN (*uelt)) | |
2932 | { | |
9e9ff709 MS |
2933 | if (TREE_CODE (*uelt) != FIELD_DECL) |
2934 | continue; | |
2935 | ||
2936 | if (TREE_PRIVATE (*uelt)) | |
2937 | cp_pedwarn_at ("private member `%#D' in anonymous union", | |
2938 | *uelt); | |
2939 | else if (TREE_PROTECTED (*uelt)) | |
2940 | cp_pedwarn_at ("protected member `%#D' in anonymous union", | |
2941 | *uelt); | |
fc378698 MS |
2942 | |
2943 | TREE_PRIVATE (*uelt) = TREE_PRIVATE (field); | |
2944 | TREE_PROTECTED (*uelt) = TREE_PROTECTED (field); | |
9e9ff709 MS |
2945 | } |
2946 | } | |
2947 | } | |
2948 | } | |
2949 | ||
f30432d7 MS |
2950 | extern int interface_only, interface_unknown; |
2951 | ||
8d08fdba MS |
2952 | /* Create a RECORD_TYPE or UNION_TYPE node for a C struct or union declaration |
2953 | (or C++ class declaration). | |
2954 | ||
2955 | For C++, we must handle the building of derived classes. | |
2956 | Also, C++ allows static class members. The way that this is | |
2957 | handled is to keep the field name where it is (as the DECL_NAME | |
2958 | of the field), and place the overloaded decl in the DECL_FIELD_BITPOS | |
2959 | of the field. layout_record and layout_union will know about this. | |
2960 | ||
2961 | More C++ hair: inline functions have text in their | |
2962 | DECL_PENDING_INLINE_INFO nodes which must somehow be parsed into | |
2963 | meaningful tree structure. After the struct has been laid out, set | |
2964 | things up so that this can happen. | |
2965 | ||
2966 | And still more: virtual functions. In the case of single inheritance, | |
2967 | when a new virtual function is seen which redefines a virtual function | |
2968 | from the base class, the new virtual function is placed into | |
2969 | the virtual function table at exactly the same address that | |
2970 | it had in the base class. When this is extended to multiple | |
2971 | inheritance, the same thing happens, except that multiple virtual | |
2972 | function tables must be maintained. The first virtual function | |
2973 | table is treated in exactly the same way as in the case of single | |
2974 | inheritance. Additional virtual function tables have different | |
2975 | DELTAs, which tell how to adjust `this' to point to the right thing. | |
2976 | ||
2977 | LIST_OF_FIELDLISTS is just that. The elements of the list are | |
2978 | TREE_LIST elements, whose TREE_PURPOSE field tells what access | |
2979 | the list has, and the TREE_VALUE slot gives the actual fields. | |
2980 | ||
2ee887f2 MS |
2981 | ATTRIBUTES is the set of decl attributes to be applied, if any. |
2982 | ||
8d08fdba MS |
2983 | If flag_all_virtual == 1, then we lay all functions into |
2984 | the virtual function table, as though they were declared | |
2985 | virtual. Constructors do not lay down in the virtual function table. | |
2986 | ||
2987 | If flag_all_virtual == 2, then we lay all functions into | |
2988 | the virtual function table, such that virtual functions | |
2989 | occupy a space by themselves, and then all functions | |
2990 | of the class occupy a space by themselves. This is illustrated | |
2991 | in the following diagram: | |
2992 | ||
2993 | class A; class B : A; | |
2994 | ||
2995 | Class A's vtbl: Class B's vtbl: | |
2996 | -------------------------------------------------------------------- | |
2997 | | A's virtual functions| | B's virtual functions | | |
2998 | | | | (may inherit some from A). | | |
2999 | -------------------------------------------------------------------- | |
3000 | | All of A's functions | | All of A's functions | | |
3001 | | (such as a->A::f). | | (such as b->A::f) | | |
3002 | -------------------------------------------------------------------- | |
3003 | | B's new virtual functions | | |
3004 | | (not defined in A.) | | |
3005 | ------------------------------- | |
3006 | | All of B's functions | | |
3007 | | (such as b->B::f) | | |
3008 | ------------------------------- | |
3009 | ||
3010 | this allows the program to make references to any function, virtual | |
3011 | or otherwise in a type-consistent manner. */ | |
3012 | ||
3013 | tree | |
6467930b MS |
3014 | finish_struct_1 (t, warn_anon) |
3015 | tree t; | |
8d08fdba MS |
3016 | int warn_anon; |
3017 | { | |
8d08fdba | 3018 | int old; |
f30432d7 | 3019 | tree name = TYPE_IDENTIFIER (t); |
8d08fdba | 3020 | enum tree_code code = TREE_CODE (t); |
f30432d7 | 3021 | tree fields = TYPE_FIELDS (t); |
72b7eeff | 3022 | tree fn_fields = TYPE_METHODS (t); |
f30432d7 | 3023 | tree x, last_x, method_vec; |
8d08fdba MS |
3024 | int all_virtual; |
3025 | int has_virtual; | |
3026 | int max_has_virtual; | |
3027 | tree pending_virtuals = NULL_TREE; | |
aa598818 | 3028 | tree pending_hard_virtuals = NULL_TREE; |
8d08fdba MS |
3029 | tree abstract_virtuals = NULL_TREE; |
3030 | tree vfield; | |
3031 | tree vfields; | |
3032 | int cant_have_default_ctor; | |
3033 | int cant_have_const_ctor; | |
8d08fdba MS |
3034 | int no_const_asn_ref; |
3035 | ||
3036 | /* The index of the first base class which has virtual | |
3037 | functions. Only applied to non-virtual baseclasses. */ | |
3038 | int first_vfn_base_index; | |
3039 | ||
3040 | int n_baseclasses; | |
3041 | int any_default_members = 0; | |
3042 | int const_sans_init = 0; | |
3043 | int ref_sans_init = 0; | |
8d08fdba | 3044 | int nonprivate_method = 0; |
a0a33927 | 3045 | tree access_decls = NULL_TREE; |
f30432d7 | 3046 | int aggregate = 1; |
691c003d | 3047 | int empty = 1; |
824b9a4c | 3048 | int has_pointers = 0; |
8d08fdba | 3049 | |
f30432d7 | 3050 | if (warn_anon && code != UNION_TYPE && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t))) |
a0a33927 | 3051 | pedwarn ("anonymous class type not used to declare any objects"); |
8d08fdba | 3052 | |
8d08fdba MS |
3053 | if (TYPE_SIZE (t)) |
3054 | { | |
3055 | if (IS_AGGR_TYPE (t)) | |
3056 | cp_error ("redefinition of `%#T'", t); | |
3057 | else | |
3058 | my_friendly_abort (172); | |
3059 | popclass (0); | |
3060 | return t; | |
3061 | } | |
3062 | ||
8d08fdba MS |
3063 | GNU_xref_decl (current_function_decl, t); |
3064 | ||
3065 | /* If this type was previously laid out as a forward reference, | |
3066 | make sure we lay it out again. */ | |
3067 | ||
a0a33927 | 3068 | TYPE_SIZE (t) = NULL_TREE; |
8d08fdba MS |
3069 | CLASSTYPE_GOT_SEMICOLON (t) = 0; |
3070 | ||
f376e137 | 3071 | #if 0 |
00595019 MS |
3072 | /* This is in general too late to do this. I moved the main case up to |
3073 | left_curly, what else needs to move? */ | |
3074 | if (! IS_SIGNATURE (t)) | |
8d08fdba | 3075 | { |
00595019 MS |
3076 | my_friendly_assert (CLASSTYPE_INTERFACE_ONLY (t) == interface_only, 999); |
3077 | my_friendly_assert (CLASSTYPE_INTERFACE_KNOWN (t) == ! interface_unknown, 999); | |
8d08fdba | 3078 | } |
f376e137 | 3079 | #endif |
8d08fdba | 3080 | |
8d08fdba MS |
3081 | old = suspend_momentary (); |
3082 | ||
3083 | /* Install struct as DECL_FIELD_CONTEXT of each field decl. | |
3084 | Also process specified field sizes. | |
3085 | Set DECL_FIELD_SIZE to the specified size, or 0 if none specified. | |
3086 | The specified size is found in the DECL_INITIAL. | |
3087 | Store 0 there, except for ": 0" fields (so we can find them | |
3088 | and delete them, below). */ | |
3089 | ||
9a71c18b JM |
3090 | if (TYPE_BINFO_BASETYPES (t)) |
3091 | n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (t)); | |
8d08fdba MS |
3092 | else |
3093 | n_baseclasses = 0; | |
3094 | ||
3095 | if (n_baseclasses > 0) | |
3096 | { | |
3097 | struct base_info base_info; | |
3098 | ||
9a71c18b | 3099 | first_vfn_base_index = finish_base_struct (t, &base_info); |
e92cc029 | 3100 | /* Remember where we got our vfield from. */ |
8d08fdba MS |
3101 | CLASSTYPE_VFIELD_PARENT (t) = first_vfn_base_index; |
3102 | has_virtual = base_info.has_virtual; | |
3103 | max_has_virtual = base_info.max_has_virtual; | |
3104 | CLASSTYPE_N_SUPERCLASSES (t) += base_info.n_ancestors; | |
3105 | vfield = base_info.vfield; | |
3106 | vfields = base_info.vfields; | |
6b5fbb55 | 3107 | CLASSTYPE_RTTI (t) = base_info.rtti; |
8d08fdba MS |
3108 | cant_have_default_ctor = base_info.cant_have_default_ctor; |
3109 | cant_have_const_ctor = base_info.cant_have_const_ctor; | |
8d08fdba | 3110 | no_const_asn_ref = base_info.no_const_asn_ref; |
f30432d7 | 3111 | aggregate = 0; |
8d08fdba MS |
3112 | } |
3113 | else | |
3114 | { | |
3115 | first_vfn_base_index = -1; | |
3116 | has_virtual = 0; | |
3117 | max_has_virtual = has_virtual; | |
3118 | vfield = NULL_TREE; | |
3119 | vfields = NULL_TREE; | |
6b5fbb55 | 3120 | CLASSTYPE_RTTI (t) = NULL_TREE; |
8d08fdba MS |
3121 | cant_have_default_ctor = 0; |
3122 | cant_have_const_ctor = 0; | |
8d08fdba | 3123 | no_const_asn_ref = 0; |
8d08fdba MS |
3124 | } |
3125 | ||
f376e137 | 3126 | #if 0 |
00595019 | 3127 | /* Both of these should be done before now. */ |
8d08fdba | 3128 | if (write_virtuals == 3 && CLASSTYPE_INTERFACE_KNOWN (t) |
700f8a87 | 3129 | && ! IS_SIGNATURE (t)) |
8d08fdba | 3130 | { |
00595019 MS |
3131 | my_friendly_assert (CLASSTYPE_INTERFACE_ONLY (t) == interface_only, 999); |
3132 | my_friendly_assert (CLASSTYPE_VTABLE_NEEDS_WRITING (t) == ! interface_only, 999); | |
8d08fdba | 3133 | } |
f376e137 | 3134 | #endif |
8d08fdba MS |
3135 | |
3136 | /* The three of these are approximations which may later be | |
3137 | modified. Needed at this point to make add_virtual_function | |
3138 | and modify_vtable_entries work. */ | |
8d08fdba MS |
3139 | CLASSTYPE_VFIELDS (t) = vfields; |
3140 | CLASSTYPE_VFIELD (t) = vfield; | |
3141 | ||
8d08fdba MS |
3142 | if (IS_SIGNATURE (t)) |
3143 | all_virtual = 0; | |
277294d7 | 3144 | else if (flag_all_virtual == 1) |
8d08fdba MS |
3145 | all_virtual = 1; |
3146 | else | |
3147 | all_virtual = 0; | |
3148 | ||
72b7eeff | 3149 | for (x = TYPE_METHODS (t); x; x = TREE_CHAIN (x)) |
8d08fdba | 3150 | { |
f30432d7 | 3151 | GNU_xref_member (current_class_name, x); |
8d08fdba | 3152 | |
f30432d7 | 3153 | nonprivate_method |= ! TREE_PRIVATE (x); |
8d08fdba | 3154 | |
f30432d7 MS |
3155 | /* If this was an evil function, don't keep it in class. */ |
3156 | if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (x))) | |
3157 | continue; | |
8d08fdba | 3158 | |
f30432d7 | 3159 | DECL_CLASS_CONTEXT (x) = t; |
8d2733ca | 3160 | |
f30432d7 MS |
3161 | /* Do both of these, even though they're in the same union; |
3162 | if the insn `r' member and the size `i' member are | |
3163 | different sizes, as on the alpha, the larger of the two | |
3164 | will end up with garbage in it. */ | |
3165 | DECL_SAVED_INSNS (x) = NULL_RTX; | |
3166 | DECL_FIELD_SIZE (x) = 0; | |
a4443a08 | 3167 | |
cffa8729 MS |
3168 | check_for_override (x, t); |
3169 | if (DECL_ABSTRACT_VIRTUAL_P (x) && ! DECL_VINDEX (x)) | |
3170 | cp_error_at ("initializer specified for non-virtual method `%D'", x); | |
2ee887f2 | 3171 | |
f30432d7 MS |
3172 | /* The name of the field is the original field name |
3173 | Save this in auxiliary field for later overloading. */ | |
3174 | if (DECL_VINDEX (x) | |
3175 | || (all_virtual == 1 && ! DECL_CONSTRUCTOR_P (x))) | |
3176 | { | |
aa598818 JM |
3177 | add_virtual_function (&pending_virtuals, &pending_hard_virtuals, |
3178 | &has_virtual, x, t); | |
f30432d7 MS |
3179 | if (DECL_ABSTRACT_VIRTUAL_P (x)) |
3180 | abstract_virtuals = tree_cons (NULL_TREE, x, abstract_virtuals); | |
5566b478 MS |
3181 | #if 0 |
3182 | /* XXX Why did I comment this out? (jason) */ | |
f30432d7 MS |
3183 | else |
3184 | TREE_USED (x) = 1; | |
5566b478 | 3185 | #endif |
f30432d7 MS |
3186 | } |
3187 | } | |
8d08fdba | 3188 | |
732dcb6f JM |
3189 | if (n_baseclasses) |
3190 | fields = chainon (build_vbase_pointer_fields (t), fields); | |
3191 | ||
9a71c18b JM |
3192 | last_x = NULL_TREE; |
3193 | for (x = fields; x; x = TREE_CHAIN (x)) | |
f30432d7 MS |
3194 | { |
3195 | GNU_xref_member (current_class_name, x); | |
8d08fdba | 3196 | |
c91a56d2 | 3197 | if (TREE_CODE (x) == FIELD_DECL) |
691c003d MS |
3198 | { |
3199 | DECL_PACKED (x) |= TYPE_PACKED (t); | |
3200 | empty = 0; | |
3201 | } | |
c91a56d2 | 3202 | |
f30432d7 | 3203 | /* Handle access declarations. */ |
cffa8729 | 3204 | if (TREE_CODE (x) == USING_DECL) |
f30432d7 | 3205 | { |
cffa8729 MS |
3206 | tree ctype = DECL_INITIAL (x); |
3207 | tree sname = DECL_NAME (x); | |
be99da77 | 3208 | tree access |
beb53fb8 JM |
3209 | = TREE_PRIVATE (x) ? access_private_node |
3210 | : TREE_PROTECTED (x) ? access_protected_node | |
3211 | : access_public_node; | |
cffa8729 | 3212 | tree fdecl, binfo; |
8d08fdba | 3213 | |
f30432d7 MS |
3214 | if (last_x) |
3215 | TREE_CHAIN (last_x) = TREE_CHAIN (x); | |
3216 | else | |
3217 | fields = TREE_CHAIN (x); | |
8d08fdba | 3218 | |
cffa8729 MS |
3219 | binfo = binfo_or_else (ctype, t); |
3220 | if (! binfo) | |
3221 | continue; | |
3222 | ||
3223 | if (sname == constructor_name (ctype) | |
3224 | || sname == constructor_name_full (ctype)) | |
3225 | cp_error_at ("using-declaration for constructor", x); | |
3226 | ||
3227 | fdecl = lookup_field (binfo, sname, 0, 0); | |
3228 | if (! fdecl) | |
3229 | fdecl = lookup_fnfields (binfo, sname, 0); | |
3230 | ||
3231 | if (fdecl) | |
e66d884e | 3232 | access_decls = scratch_tree_cons (access, fdecl, access_decls); |
cffa8729 MS |
3233 | else |
3234 | cp_error_at ("no members matching `%D' in `%#T'", x, ctype); | |
f30432d7 MS |
3235 | continue; |
3236 | } | |
8d08fdba | 3237 | |
f30432d7 | 3238 | last_x = x; |
8d08fdba | 3239 | |
050367a3 MM |
3240 | if (TREE_CODE (x) == TYPE_DECL |
3241 | || TREE_CODE (x) == TEMPLATE_DECL) | |
f30432d7 | 3242 | continue; |
8d08fdba | 3243 | |
f30432d7 | 3244 | /* If we've gotten this far, it's a data member, possibly static, |
e92cc029 | 3245 | or an enumerator. */ |
8d08fdba | 3246 | |
f30432d7 | 3247 | DECL_FIELD_CONTEXT (x) = t; |
8d08fdba | 3248 | |
f30432d7 MS |
3249 | /* ``A local class cannot have static data members.'' ARM 9.4 */ |
3250 | if (current_function_decl && TREE_STATIC (x)) | |
3251 | cp_error_at ("field `%D' in local class cannot be static", x); | |
8d08fdba | 3252 | |
f30432d7 MS |
3253 | /* Perform error checking that did not get done in |
3254 | grokdeclarator. */ | |
3255 | if (TREE_CODE (TREE_TYPE (x)) == FUNCTION_TYPE) | |
3256 | { | |
3257 | cp_error_at ("field `%D' invalidly declared function type", | |
3258 | x); | |
3259 | TREE_TYPE (x) = build_pointer_type (TREE_TYPE (x)); | |
3260 | } | |
3261 | else if (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE) | |
3262 | { | |
3263 | cp_error_at ("field `%D' invalidly declared method type", x); | |
3264 | TREE_TYPE (x) = build_pointer_type (TREE_TYPE (x)); | |
3265 | } | |
3266 | else if (TREE_CODE (TREE_TYPE (x)) == OFFSET_TYPE) | |
3267 | { | |
3268 | cp_error_at ("field `%D' invalidly declared offset type", x); | |
3269 | TREE_TYPE (x) = build_pointer_type (TREE_TYPE (x)); | |
3270 | } | |
8d08fdba | 3271 | |
f714b8e5 | 3272 | #if 0 |
f30432d7 | 3273 | if (DECL_NAME (x) == constructor_name (t)) |
e349ee73 | 3274 | cant_have_default_ctor = 1; |
f714b8e5 | 3275 | #endif |
f376e137 | 3276 | |
f30432d7 MS |
3277 | if (TREE_TYPE (x) == error_mark_node) |
3278 | continue; | |
8d08fdba | 3279 | |
f30432d7 MS |
3280 | DECL_SAVED_INSNS (x) = NULL_RTX; |
3281 | DECL_FIELD_SIZE (x) = 0; | |
8d08fdba | 3282 | |
f30432d7 MS |
3283 | /* When this goes into scope, it will be a non-local reference. */ |
3284 | DECL_NONLOCAL (x) = 1; | |
8d08fdba | 3285 | |
f30432d7 MS |
3286 | if (TREE_CODE (x) == CONST_DECL) |
3287 | continue; | |
8d08fdba | 3288 | |
f30432d7 MS |
3289 | if (TREE_CODE (x) == VAR_DECL) |
3290 | { | |
3291 | if (TREE_CODE (t) == UNION_TYPE) | |
3292 | /* Unions cannot have static members. */ | |
3293 | cp_error_at ("field `%D' declared static in union", x); | |
8d08fdba | 3294 | |
f30432d7 MS |
3295 | continue; |
3296 | } | |
8d08fdba | 3297 | |
f30432d7 | 3298 | /* Now it can only be a FIELD_DECL. */ |
8d08fdba | 3299 | |
f30432d7 MS |
3300 | if (TREE_PRIVATE (x) || TREE_PROTECTED (x)) |
3301 | aggregate = 0; | |
8d08fdba | 3302 | |
f30432d7 MS |
3303 | /* If this is of reference type, check if it needs an init. |
3304 | Also do a little ANSI jig if necessary. */ | |
3305 | if (TREE_CODE (TREE_TYPE (x)) == REFERENCE_TYPE) | |
3306 | { | |
3307 | if (DECL_INITIAL (x) == NULL_TREE) | |
3308 | ref_sans_init = 1; | |
8d08fdba | 3309 | |
f30432d7 MS |
3310 | /* ARM $12.6.2: [A member initializer list] (or, for an |
3311 | aggregate, initialization by a brace-enclosed list) is the | |
3312 | only way to initialize nonstatic const and reference | |
3313 | members. */ | |
f30432d7 | 3314 | cant_have_default_ctor = 1; |
e349ee73 | 3315 | TYPE_HAS_COMPLEX_ASSIGN_REF (t) = 1; |
f30432d7 MS |
3316 | |
3317 | if (! TYPE_HAS_CONSTRUCTOR (t) && extra_warnings) | |
3318 | { | |
3319 | if (DECL_NAME (x)) | |
3320 | cp_warning_at ("non-static reference `%#D' in class without a constructor", x); | |
3321 | else | |
3322 | cp_warning_at ("non-static reference in class without a constructor", x); | |
8d08fdba | 3323 | } |
f30432d7 | 3324 | } |
8d08fdba | 3325 | |
824b9a4c MS |
3326 | if (TREE_CODE (TREE_TYPE (x)) == POINTER_TYPE) |
3327 | has_pointers = 1; | |
3328 | ||
f30432d7 MS |
3329 | /* If any field is const, the structure type is pseudo-const. */ |
3330 | if (TREE_READONLY (x)) | |
3331 | { | |
3332 | C_TYPE_FIELDS_READONLY (t) = 1; | |
3333 | if (DECL_INITIAL (x) == NULL_TREE) | |
3334 | const_sans_init = 1; | |
3335 | ||
3336 | /* ARM $12.6.2: [A member initializer list] (or, for an | |
3337 | aggregate, initialization by a brace-enclosed list) is the | |
3338 | only way to initialize nonstatic const and reference | |
3339 | members. */ | |
f30432d7 | 3340 | cant_have_default_ctor = 1; |
e349ee73 | 3341 | TYPE_HAS_COMPLEX_ASSIGN_REF (t) = 1; |
f30432d7 MS |
3342 | |
3343 | if (! TYPE_HAS_CONSTRUCTOR (t) && !IS_SIGNATURE (t) | |
3344 | && extra_warnings) | |
3345 | { | |
3346 | if (DECL_NAME (x)) | |
3347 | cp_warning_at ("non-static const member `%#D' in class without a constructor", x); | |
3348 | else | |
3349 | cp_warning_at ("non-static const member in class without a constructor", x); | |
3350 | } | |
3351 | } | |
3352 | else | |
3353 | { | |
3354 | /* A field that is pseudo-const makes the structure | |
3355 | likewise. */ | |
3356 | tree t1 = TREE_TYPE (x); | |
3357 | while (TREE_CODE (t1) == ARRAY_TYPE) | |
3358 | t1 = TREE_TYPE (t1); | |
3359 | if (IS_AGGR_TYPE (t1)) | |
8d08fdba | 3360 | { |
f30432d7 MS |
3361 | if (C_TYPE_FIELDS_READONLY (t1)) |
3362 | C_TYPE_FIELDS_READONLY (t) = 1; | |
3363 | if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (t1)) | |
8d08fdba | 3364 | const_sans_init = 1; |
f30432d7 MS |
3365 | } |
3366 | } | |
8d08fdba | 3367 | |
f30432d7 MS |
3368 | /* We set DECL_BIT_FIELD tentatively in grokbitfield. |
3369 | If the type and width are valid, we'll keep it set. | |
3370 | Otherwise, the flag is cleared. */ | |
3371 | if (DECL_BIT_FIELD (x)) | |
3372 | { | |
3373 | DECL_BIT_FIELD (x) = 0; | |
3374 | /* Invalid bit-field size done by grokfield. */ | |
3375 | /* Detect invalid bit-field type. */ | |
3376 | if (DECL_INITIAL (x) | |
3377 | && ! INTEGRAL_TYPE_P (TREE_TYPE (x))) | |
3378 | { | |
3379 | cp_error_at ("bit-field `%#D' with non-integral type", x); | |
3380 | DECL_INITIAL (x) = NULL; | |
3381 | } | |
8d08fdba | 3382 | |
f30432d7 MS |
3383 | /* Detect and ignore out of range field width. */ |
3384 | if (DECL_INITIAL (x)) | |
3385 | { | |
5566b478 | 3386 | tree w = DECL_INITIAL (x); |
a703fb38 | 3387 | register int width = 0; |
f30432d7 | 3388 | |
5566b478 MS |
3389 | /* Avoid the non_lvalue wrapper added by fold for PLUS_EXPRs. */ |
3390 | STRIP_NOPS (w); | |
3391 | ||
3392 | /* detect invalid field size. */ | |
3393 | if (TREE_CODE (w) == CONST_DECL) | |
3394 | w = DECL_INITIAL (w); | |
3395 | else if (TREE_READONLY_DECL_P (w)) | |
3396 | w = decl_constant_value (w); | |
3397 | ||
3398 | if (TREE_CODE (w) != INTEGER_CST) | |
3399 | { | |
3400 | cp_error_at ("bit-field `%D' width not an integer constant", | |
3401 | x); | |
3402 | DECL_INITIAL (x) = NULL_TREE; | |
3403 | } | |
3404 | else if (width = TREE_INT_CST_LOW (w), | |
3405 | width < 0) | |
8d08fdba | 3406 | { |
f30432d7 MS |
3407 | DECL_INITIAL (x) = NULL; |
3408 | cp_error_at ("negative width in bit-field `%D'", x); | |
8d08fdba | 3409 | } |
f30432d7 | 3410 | else if (width == 0 && DECL_NAME (x) != 0) |
8d08fdba | 3411 | { |
f30432d7 MS |
3412 | DECL_INITIAL (x) = NULL; |
3413 | cp_error_at ("zero width for bit-field `%D'", x); | |
8d08fdba | 3414 | } |
f30432d7 MS |
3415 | else if (width |
3416 | > TYPE_PRECISION (long_long_unsigned_type_node)) | |
8d08fdba | 3417 | { |
f30432d7 MS |
3418 | /* The backend will dump if you try to use something |
3419 | too big; avoid that. */ | |
8d08fdba | 3420 | DECL_INITIAL (x) = NULL; |
f30432d7 MS |
3421 | sorry ("bit-fields larger than %d bits", |
3422 | TYPE_PRECISION (long_long_unsigned_type_node)); | |
3423 | cp_error_at (" in declaration of `%D'", x); | |
8d08fdba | 3424 | } |
f30432d7 | 3425 | else if (width > TYPE_PRECISION (TREE_TYPE (x)) |
18922a6b JM |
3426 | && TREE_CODE (TREE_TYPE (x)) != ENUMERAL_TYPE |
3427 | && TREE_CODE (TREE_TYPE (x)) != BOOLEAN_TYPE) | |
8d08fdba | 3428 | { |
f30432d7 | 3429 | cp_warning_at ("width of `%D' exceeds its type", x); |
8d08fdba | 3430 | } |
f30432d7 MS |
3431 | else if (TREE_CODE (TREE_TYPE (x)) == ENUMERAL_TYPE |
3432 | && ((min_precision (TYPE_MIN_VALUE (TREE_TYPE (x)), | |
3433 | TREE_UNSIGNED (TREE_TYPE (x))) > width) | |
3434 | || (min_precision (TYPE_MAX_VALUE (TREE_TYPE (x)), | |
3435 | TREE_UNSIGNED (TREE_TYPE (x))) > width))) | |
8d08fdba | 3436 | { |
f30432d7 MS |
3437 | cp_warning_at ("`%D' is too small to hold all values of `%#T'", |
3438 | x, TREE_TYPE (x)); | |
3439 | } | |
f30432d7 | 3440 | |
e92cc029 MS |
3441 | if (DECL_INITIAL (x) == NULL_TREE) |
3442 | ; | |
3443 | else if (width == 0) | |
f30432d7 | 3444 | { |
8d08fdba | 3445 | #ifdef EMPTY_FIELD_BOUNDARY |
2ee887f2 | 3446 | DECL_ALIGN (x) = MAX (DECL_ALIGN (x), EMPTY_FIELD_BOUNDARY); |
8d08fdba MS |
3447 | #endif |
3448 | #ifdef PCC_BITFIELD_TYPE_MATTERS | |
f30432d7 MS |
3449 | DECL_ALIGN (x) = MAX (DECL_ALIGN (x), |
3450 | TYPE_ALIGN (TREE_TYPE (x))); | |
8d08fdba | 3451 | #endif |
8d08fdba MS |
3452 | } |
3453 | else | |
f30432d7 MS |
3454 | { |
3455 | DECL_INITIAL (x) = NULL_TREE; | |
3456 | DECL_FIELD_SIZE (x) = width; | |
3457 | DECL_BIT_FIELD (x) = 1; | |
f30432d7 | 3458 | } |
8d08fdba MS |
3459 | } |
3460 | else | |
f30432d7 MS |
3461 | /* Non-bit-fields are aligned for their type. */ |
3462 | DECL_ALIGN (x) = MAX (DECL_ALIGN (x), TYPE_ALIGN (TREE_TYPE (x))); | |
3463 | } | |
3464 | else | |
3465 | { | |
3466 | tree type = TREE_TYPE (x); | |
8d08fdba | 3467 | |
72b7eeff | 3468 | while (TREE_CODE (type) == ARRAY_TYPE) |
f30432d7 | 3469 | type = TREE_TYPE (type); |
8d08fdba | 3470 | |
f30432d7 MS |
3471 | if (TYPE_LANG_SPECIFIC (type) && ! ANON_UNION_P (x) |
3472 | && ! TYPE_PTRMEMFUNC_P (type)) | |
3473 | { | |
3474 | /* Never let anything with uninheritable virtuals | |
3475 | make it through without complaint. */ | |
3476 | if (CLASSTYPE_ABSTRACT_VIRTUALS (type)) | |
3477 | abstract_virtuals_error (x, type); | |
8d08fdba | 3478 | |
f30432d7 MS |
3479 | /* Don't let signatures make it through either. */ |
3480 | if (IS_SIGNATURE (type)) | |
3481 | signature_error (x, type); | |
8d08fdba | 3482 | |
f30432d7 MS |
3483 | if (code == UNION_TYPE) |
3484 | { | |
3485 | char *fie = NULL; | |
3486 | if (TYPE_NEEDS_CONSTRUCTING (type)) | |
3487 | fie = "constructor"; | |
3488 | else if (TYPE_NEEDS_DESTRUCTOR (type)) | |
3489 | fie = "destructor"; | |
3490 | else if (TYPE_HAS_REAL_ASSIGNMENT (type)) | |
3491 | fie = "assignment operator"; | |
3492 | if (fie) | |
3493 | cp_error_at ("member `%#D' with %s not allowed in union", x, | |
3494 | fie); | |
3495 | } | |
3496 | else | |
3497 | { | |
3498 | TYPE_NEEDS_CONSTRUCTING (t) |= TYPE_NEEDS_CONSTRUCTING (type); | |
3499 | TYPE_NEEDS_DESTRUCTOR (t) |= TYPE_NEEDS_DESTRUCTOR (type); | |
3500 | TYPE_HAS_COMPLEX_ASSIGN_REF (t) |= TYPE_HAS_COMPLEX_ASSIGN_REF (type); | |
3501 | TYPE_HAS_COMPLEX_INIT_REF (t) |= TYPE_HAS_COMPLEX_INIT_REF (type); | |
3502 | } | |
8d08fdba | 3503 | |
e349ee73 | 3504 | if (!TYPE_HAS_CONST_INIT_REF (type)) |
f30432d7 MS |
3505 | cant_have_const_ctor = 1; |
3506 | ||
e349ee73 | 3507 | if (!TYPE_HAS_CONST_ASSIGN_REF (type)) |
f30432d7 MS |
3508 | no_const_asn_ref = 1; |
3509 | ||
3510 | if (TYPE_HAS_CONSTRUCTOR (type) | |
3511 | && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) | |
3512 | { | |
3513 | cant_have_default_ctor = 1; | |
c19a8067 | 3514 | #if 0 |
f30432d7 MS |
3515 | /* This is wrong for aggregates. */ |
3516 | if (! TYPE_HAS_CONSTRUCTOR (t)) | |
3517 | { | |
3518 | if (DECL_NAME (x)) | |
3519 | cp_pedwarn_at ("member `%#D' with only non-default constructor", x); | |
3520 | else | |
3521 | cp_pedwarn_at ("member with only non-default constructor", x); | |
3522 | cp_pedwarn_at ("in class without a constructor", | |
3523 | x); | |
8d08fdba | 3524 | } |
f30432d7 | 3525 | #endif |
8d08fdba MS |
3526 | } |
3527 | } | |
f30432d7 MS |
3528 | if (DECL_INITIAL (x) != NULL_TREE) |
3529 | { | |
3530 | /* `build_class_init_list' does not recognize | |
3531 | non-FIELD_DECLs. */ | |
3532 | if (code == UNION_TYPE && any_default_members != 0) | |
3533 | cp_error_at ("multiple fields in union `%T' initialized"); | |
3534 | any_default_members = 1; | |
3535 | } | |
8d08fdba MS |
3536 | } |
3537 | } | |
3538 | ||
8d08fdba MS |
3539 | /* If this type has any constant members which did not come |
3540 | with their own initialization, mark that fact here. It is | |
3541 | not an error here, since such types can be saved either by their | |
3542 | constructors, or by fortuitous initialization. */ | |
3543 | CLASSTYPE_READONLY_FIELDS_NEED_INIT (t) = const_sans_init; | |
3544 | CLASSTYPE_REF_FIELDS_NEED_INIT (t) = ref_sans_init; | |
3545 | CLASSTYPE_ABSTRACT_VIRTUALS (t) = abstract_virtuals; | |
3546 | ||
f376e137 MS |
3547 | /* Synthesize any needed methods. Note that methods will be synthesized |
3548 | for anonymous unions; grok_x_components undoes that. */ | |
3549 | ||
f30432d7 MS |
3550 | if (! fn_fields) |
3551 | nonprivate_method = 1; | |
3552 | ||
8d08fdba MS |
3553 | if (TYPE_NEEDS_DESTRUCTOR (t) && !TYPE_HAS_DESTRUCTOR (t) |
3554 | && !IS_SIGNATURE (t)) | |
3555 | { | |
3556 | /* Here we must cons up a destructor on the fly. */ | |
c91a56d2 | 3557 | tree dtor = cons_up_default_function (t, name, 0); |
cffa8729 | 3558 | check_for_override (dtor, t); |
8d08fdba MS |
3559 | |
3560 | /* If we couldn't make it work, then pretend we didn't need it. */ | |
3561 | if (dtor == void_type_node) | |
3562 | TYPE_NEEDS_DESTRUCTOR (t) = 0; | |
3563 | else | |
3564 | { | |
e92cc029 | 3565 | /* Link dtor onto end of fn_fields. */ |
f30432d7 MS |
3566 | |
3567 | TREE_CHAIN (dtor) = fn_fields; | |
3568 | fn_fields = dtor; | |
8d08fdba | 3569 | |
8d08fdba | 3570 | if (DECL_VINDEX (dtor)) |
aa598818 JM |
3571 | add_virtual_function (&pending_virtuals, &pending_hard_virtuals, |
3572 | &has_virtual, dtor, t); | |
8d08fdba MS |
3573 | nonprivate_method = 1; |
3574 | } | |
3575 | } | |
3576 | ||
824b9a4c | 3577 | /* Effective C++ rule 11. */ |
7834ab39 | 3578 | if (has_pointers && warn_ecpp && TYPE_HAS_CONSTRUCTOR (t) |
824b9a4c MS |
3579 | && ! (TYPE_HAS_INIT_REF (t) && TYPE_HAS_ASSIGN_REF (t))) |
3580 | { | |
3581 | cp_warning ("`%#T' has pointer data members", t); | |
3582 | ||
3583 | if (! TYPE_HAS_INIT_REF (t)) | |
3584 | { | |
3585 | cp_warning (" but does not override `%T(const %T&)'", t, t); | |
3586 | if (! TYPE_HAS_ASSIGN_REF (t)) | |
3587 | cp_warning (" or `operator=(const %T&)'", t); | |
3588 | } | |
3589 | else if (! TYPE_HAS_ASSIGN_REF (t)) | |
3590 | cp_warning (" but does not override `operator=(const %T&)'", t); | |
3591 | } | |
3592 | ||
8d08fdba MS |
3593 | TYPE_NEEDS_DESTRUCTOR (t) |= TYPE_HAS_DESTRUCTOR (t); |
3594 | ||
8d08fdba MS |
3595 | TYPE_HAS_COMPLEX_INIT_REF (t) |
3596 | |= (TYPE_HAS_INIT_REF (t) || TYPE_USES_VIRTUAL_BASECLASSES (t) | |
faf5394a | 3597 | || has_virtual || any_default_members); |
8d08fdba MS |
3598 | TYPE_NEEDS_CONSTRUCTING (t) |
3599 | |= (TYPE_HAS_CONSTRUCTOR (t) || TYPE_USES_VIRTUAL_BASECLASSES (t) | |
faf5394a | 3600 | || has_virtual || any_default_members); |
f30432d7 MS |
3601 | if (! IS_SIGNATURE (t)) |
3602 | CLASSTYPE_NON_AGGREGATE (t) | |
3603 | = ! aggregate || has_virtual || TYPE_HAS_CONSTRUCTOR (t); | |
8d08fdba MS |
3604 | |
3605 | /* ARM $12.1: A default constructor will be generated for a class X | |
3606 | only if no constructor has been declared for class X. So we | |
3607 | check TYPE_HAS_CONSTRUCTOR also, to make sure we don't generate | |
3608 | one if they declared a constructor in this class. */ | |
63718c49 GB |
3609 | if (! TYPE_HAS_CONSTRUCTOR (t) && ! cant_have_default_ctor |
3610 | && ! IS_SIGNATURE (t)) | |
8d08fdba | 3611 | { |
f376e137 | 3612 | tree default_fn = cons_up_default_function (t, name, 2); |
8d08fdba MS |
3613 | TREE_CHAIN (default_fn) = fn_fields; |
3614 | fn_fields = default_fn; | |
3615 | } | |
3616 | ||
8d2733ca | 3617 | /* Create default copy constructor, if needed. */ |
e349ee73 | 3618 | if (! TYPE_HAS_INIT_REF (t) && ! IS_SIGNATURE (t)) |
8d08fdba MS |
3619 | { |
3620 | /* ARM 12.18: You get either X(X&) or X(const X&), but | |
3621 | not both. --Chip */ | |
f376e137 MS |
3622 | tree default_fn = cons_up_default_function (t, name, |
3623 | 3 + cant_have_const_ctor); | |
8d08fdba MS |
3624 | TREE_CHAIN (default_fn) = fn_fields; |
3625 | fn_fields = default_fn; | |
3626 | } | |
3627 | ||
3628 | TYPE_HAS_REAL_ASSIGNMENT (t) |= TYPE_HAS_ASSIGNMENT (t); | |
3629 | TYPE_HAS_REAL_ASSIGN_REF (t) |= TYPE_HAS_ASSIGN_REF (t); | |
3630 | TYPE_HAS_COMPLEX_ASSIGN_REF (t) | |
e8abc66f | 3631 | |= TYPE_HAS_ASSIGN_REF (t) || TYPE_USES_VIRTUAL_BASECLASSES (t); |
8d08fdba | 3632 | |
e349ee73 | 3633 | if (! TYPE_HAS_ASSIGN_REF (t) && ! IS_SIGNATURE (t)) |
8d08fdba | 3634 | { |
f376e137 MS |
3635 | tree default_fn = cons_up_default_function (t, name, |
3636 | 5 + no_const_asn_ref); | |
8d08fdba MS |
3637 | TREE_CHAIN (default_fn) = fn_fields; |
3638 | fn_fields = default_fn; | |
3639 | } | |
3640 | ||
3641 | if (fn_fields) | |
3642 | { | |
f49422da | 3643 | TYPE_METHODS (t) = fn_fields; |
8d08fdba MS |
3644 | method_vec = finish_struct_methods (t, fn_fields, nonprivate_method); |
3645 | ||
3646 | if (TYPE_HAS_CONSTRUCTOR (t) | |
8d08fdba | 3647 | && CLASSTYPE_FRIEND_CLASSES (t) == NULL_TREE |
d2e5ee5c | 3648 | && DECL_FRIENDLIST (TYPE_MAIN_DECL (t)) == NULL_TREE) |
8d08fdba MS |
3649 | { |
3650 | int nonprivate_ctor = 0; | |
3651 | tree ctor; | |
3652 | ||
3653 | for (ctor = TREE_VEC_ELT (method_vec, 0); | |
3654 | ctor; | |
2c73f9f5 ML |
3655 | ctor = OVL_NEXT (ctor)) |
3656 | if (! TREE_PRIVATE (OVL_CURRENT (ctor))) | |
8d08fdba MS |
3657 | { |
3658 | nonprivate_ctor = 1; | |
3659 | break; | |
3660 | } | |
3661 | ||
3662 | if (nonprivate_ctor == 0 && warn_ctor_dtor_privacy) | |
3663 | cp_warning ("`%#T' only defines private constructors and has no friends", | |
3664 | t); | |
3665 | } | |
3666 | } | |
3667 | else | |
3668 | { | |
3669 | method_vec = 0; | |
3670 | ||
3671 | /* Just in case these got accidentally | |
3672 | filled in by syntax errors. */ | |
3673 | TYPE_HAS_CONSTRUCTOR (t) = 0; | |
3674 | TYPE_HAS_DESTRUCTOR (t) = 0; | |
3675 | } | |
3676 | ||
3677 | { | |
63718c49 | 3678 | int n_methods = method_vec ? TREE_VEC_LENGTH (method_vec) : 0; |
8d08fdba MS |
3679 | |
3680 | for (access_decls = nreverse (access_decls); access_decls; | |
3681 | access_decls = TREE_CHAIN (access_decls)) | |
3682 | { | |
3683 | tree fdecl = TREE_VALUE (access_decls); | |
3684 | tree flist = NULL_TREE; | |
3685 | tree name; | |
fc378698 MS |
3686 | tree access = TREE_PURPOSE (access_decls); |
3687 | int i = 2; | |
8d08fdba MS |
3688 | tree tmp; |
3689 | ||
2c73f9f5 ML |
3690 | /* Functions are represented as TREE_LIST, with the purpose |
3691 | being the type and the value the functions. Other members | |
3692 | come as themselves. */ | |
8d08fdba MS |
3693 | if (TREE_CODE (fdecl) == TREE_LIST) |
3694 | { | |
2c73f9f5 ML |
3695 | /* Ignore base type this came from. */ |
3696 | fdecl = TREE_VALUE (fdecl); | |
3697 | } | |
3698 | if (TREE_CODE (fdecl) == OVERLOAD) | |
3699 | { | |
3700 | /* We later iterate over all functions. */ | |
8d08fdba | 3701 | flist = fdecl; |
2c73f9f5 | 3702 | fdecl = OVL_FUNCTION (flist); |
8d08fdba MS |
3703 | } |
3704 | ||
3705 | name = DECL_NAME (fdecl); | |
3706 | ||
3707 | for (; i < n_methods; i++) | |
3708 | if (DECL_NAME (TREE_VEC_ELT (method_vec, i)) == name) | |
3709 | { | |
3710 | cp_error ("cannot adjust access to `%#D' in `%#T'", fdecl, t); | |
a0a33927 | 3711 | cp_error_at (" because of local method `%#D' with same name", |
8d08fdba | 3712 | TREE_VEC_ELT (method_vec, i)); |
a0a33927 | 3713 | fdecl = NULL_TREE; |
8d08fdba MS |
3714 | break; |
3715 | } | |
3716 | ||
3717 | if (! fdecl) | |
3718 | continue; | |
3719 | ||
3720 | for (tmp = fields; tmp; tmp = TREE_CHAIN (tmp)) | |
3721 | if (DECL_NAME (tmp) == name) | |
3722 | { | |
3723 | cp_error ("cannot adjust access to `%#D' in `%#T'", fdecl, t); | |
a0a33927 MS |
3724 | cp_error_at (" because of local field `%#D' with same name", tmp); |
3725 | fdecl = NULL_TREE; | |
8d08fdba MS |
3726 | break; |
3727 | } | |
3728 | ||
3729 | if (!fdecl) | |
3730 | continue; | |
3731 | ||
3732 | /* Make type T see field decl FDECL with access ACCESS.*/ | |
3733 | if (flist) | |
3734 | { | |
2c73f9f5 | 3735 | while (flist) |
8d08fdba | 3736 | { |
2c73f9f5 | 3737 | if (alter_access (t, OVL_FUNCTION (flist), access) == 0) |
8d08fdba | 3738 | break; |
2c73f9f5 | 3739 | flist = OVL_CHAIN (flist); |
8d08fdba MS |
3740 | } |
3741 | } | |
3742 | else | |
3743 | alter_access (t, fdecl, access); | |
3744 | } | |
3745 | ||
3746 | } | |
3747 | ||
3748 | if (vfield == NULL_TREE && has_virtual) | |
3749 | { | |
3750 | /* We build this decl with ptr_type_node, and | |
3751 | change the type when we know what it should be. */ | |
3752 | vfield = build_lang_field_decl (FIELD_DECL, get_vfield_name (t), | |
3753 | ptr_type_node); | |
3754 | /* If you change any of the below, take a look at all the | |
3755 | other VFIELD_BASEs and VTABLE_BASEs in the code, and change | |
e92cc029 | 3756 | them too. */ |
8d08fdba MS |
3757 | DECL_ASSEMBLER_NAME (vfield) = get_identifier (VFIELD_BASE); |
3758 | CLASSTYPE_VFIELD (t) = vfield; | |
3759 | DECL_VIRTUAL_P (vfield) = 1; | |
d2e5ee5c | 3760 | DECL_ARTIFICIAL (vfield) = 1; |
8d08fdba MS |
3761 | DECL_FIELD_CONTEXT (vfield) = t; |
3762 | DECL_CLASS_CONTEXT (vfield) = t; | |
3763 | DECL_FCONTEXT (vfield) = t; | |
28cbf42c | 3764 | DECL_SAVED_INSNS (vfield) = NULL_RTX; |
8d08fdba MS |
3765 | DECL_FIELD_SIZE (vfield) = 0; |
3766 | DECL_ALIGN (vfield) = TYPE_ALIGN (ptr_type_node); | |
6b5fbb55 MS |
3767 | #if 0 |
3768 | /* This is more efficient, but breaks binary compatibility, turn | |
3769 | it on sometime when we don't care. If we turn it on, we also | |
3770 | have to enable the code in dfs_init_vbase_pointers. */ | |
3771 | /* vfield is always first entry in structure. */ | |
3772 | TREE_CHAIN (vfield) = fields; | |
3773 | fields = vfield; | |
3774 | #else | |
3775 | if (last_x) | |
8d08fdba | 3776 | { |
a0a33927 | 3777 | my_friendly_assert (TREE_CHAIN (last_x) == NULL_TREE, 175); |
8d08fdba MS |
3778 | TREE_CHAIN (last_x) = vfield; |
3779 | last_x = vfield; | |
3780 | } | |
3781 | else | |
3782 | fields = vfield; | |
6b5fbb55 | 3783 | #endif |
691c003d | 3784 | empty = 0; |
8d08fdba MS |
3785 | vfields = chainon (vfields, CLASSTYPE_AS_LIST (t)); |
3786 | } | |
3787 | ||
3788 | /* Now DECL_INITIAL is null on all members except for zero-width bit-fields. | |
3789 | And they have already done their work. | |
3790 | ||
3791 | C++: maybe we will support default field initialization some day... */ | |
3792 | ||
3793 | /* Delete all zero-width bit-fields from the front of the fieldlist */ | |
3794 | while (fields && DECL_BIT_FIELD (fields) | |
3795 | && DECL_INITIAL (fields)) | |
3796 | fields = TREE_CHAIN (fields); | |
3797 | /* Delete all such fields from the rest of the fields. */ | |
3798 | for (x = fields; x;) | |
3799 | { | |
3800 | if (TREE_CHAIN (x) && DECL_BIT_FIELD (TREE_CHAIN (x)) | |
3801 | && DECL_INITIAL (TREE_CHAIN (x))) | |
3802 | TREE_CHAIN (x) = TREE_CHAIN (TREE_CHAIN (x)); | |
3803 | else | |
3804 | x = TREE_CHAIN (x); | |
3805 | } | |
3806 | /* Delete all duplicate fields from the fields */ | |
3807 | delete_duplicate_fields (fields); | |
3808 | ||
f376e137 MS |
3809 | /* Catch function/field name conflict. We don't need to do this for a |
3810 | signature, since it can only contain the fields constructed in | |
3811 | append_signature_fields. */ | |
3812 | if (! IS_SIGNATURE (t)) | |
3813 | { | |
3814 | int n_methods = method_vec ? TREE_VEC_LENGTH (method_vec) : 0; | |
3815 | for (x = fields; x; x = TREE_CHAIN (x)) | |
3816 | { | |
3817 | tree name = DECL_NAME (x); | |
fc378698 MS |
3818 | int i = 2; |
3819 | ||
5566b478 MS |
3820 | if (TREE_CODE (x) == TYPE_DECL && DECL_ARTIFICIAL (x)) |
3821 | continue; | |
fc378698 | 3822 | |
f376e137 MS |
3823 | for (; i < n_methods; ++i) |
3824 | if (DECL_NAME (TREE_VEC_ELT (method_vec, i)) == name) | |
3825 | { | |
3826 | cp_error_at ("data member `%#D' conflicts with", x); | |
3827 | cp_error_at ("function member `%#D'", | |
3828 | TREE_VEC_ELT (method_vec, i)); | |
3829 | break; | |
3830 | } | |
3831 | } | |
3832 | } | |
00595019 | 3833 | |
8d08fdba MS |
3834 | /* Now we have the final fieldlist for the data fields. Record it, |
3835 | then lay out the structure or union (including the fields). */ | |
3836 | ||
3837 | TYPE_FIELDS (t) = fields; | |
3838 | ||
8d08fdba | 3839 | if (n_baseclasses) |
732dcb6f JM |
3840 | { |
3841 | last_x = build_base_fields (t); | |
3842 | ||
3843 | /* If all our bases are empty, we can be empty too. */ | |
3844 | for (x = last_x; empty && x; x = TREE_CHAIN (x)) | |
3845 | if (DECL_SIZE (x) != integer_zero_node) | |
3846 | empty = 0; | |
3847 | } | |
3848 | if (empty) | |
691c003d MS |
3849 | { |
3850 | /* C++: do not let empty structures exist. */ | |
3851 | tree decl = build_lang_field_decl | |
3852 | (FIELD_DECL, NULL_TREE, char_type_node); | |
732dcb6f | 3853 | TREE_CHAIN (decl) = fields; |
691c003d MS |
3854 | TYPE_FIELDS (t) = decl; |
3855 | } | |
732dcb6f JM |
3856 | if (n_baseclasses) |
3857 | TYPE_FIELDS (t) = chainon (last_x, TYPE_FIELDS (t)); | |
8d08fdba MS |
3858 | |
3859 | layout_type (t); | |
3860 | ||
9a71c18b | 3861 | /* Remember the size and alignment of the class before adding |
0b41abe6 | 3862 | the virtual bases. */ |
732dcb6f JM |
3863 | if (empty && flag_new_abi) |
3864 | CLASSTYPE_SIZE (t) = integer_zero_node; | |
3865 | else | |
3866 | CLASSTYPE_SIZE (t) = TYPE_SIZE (t); | |
0b41abe6 JM |
3867 | CLASSTYPE_ALIGN (t) = TYPE_ALIGN (t); |
3868 | ||
9e9ff709 | 3869 | finish_struct_anon (t); |
8d08fdba | 3870 | |
8d08fdba MS |
3871 | /* Set the TYPE_DECL for this type to contain the right |
3872 | value for DECL_OFFSET, so that we can use it as part | |
3873 | of a COMPONENT_REF for multiple inheritance. */ | |
3874 | ||
d2e5ee5c | 3875 | layout_decl (TYPE_MAIN_DECL (t), 0); |
8d08fdba | 3876 | |
7177d104 MS |
3877 | /* Now fix up any virtual base class types that we left lying |
3878 | around. We must get these done before we try to lay out the | |
3879 | virtual function table. */ | |
8d08fdba MS |
3880 | pending_hard_virtuals = nreverse (pending_hard_virtuals); |
3881 | ||
9a71c18b JM |
3882 | if (n_baseclasses) |
3883 | /* layout_basetypes will remove the base subobject fields. */ | |
3884 | max_has_virtual = layout_basetypes (t, max_has_virtual); | |
3885 | else if (empty) | |
3886 | TYPE_FIELDS (t) = fields; | |
3887 | ||
8d08fdba MS |
3888 | if (TYPE_USES_VIRTUAL_BASECLASSES (t)) |
3889 | { | |
3890 | tree vbases; | |
3891 | ||
8d08fdba MS |
3892 | vbases = CLASSTYPE_VBASECLASSES (t); |
3893 | CLASSTYPE_N_VBASECLASSES (t) = list_length (vbases); | |
3894 | ||
39211cd5 MS |
3895 | { |
3896 | /* Now fixup overrides of all functions in vtables from all | |
3897 | direct or indirect virtual base classes. */ | |
3898 | tree binfos = BINFO_BASETYPES (TYPE_BINFO (t)); | |
3899 | int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; | |
3900 | ||
3901 | for (i = 0; i < n_baseclasses; i++) | |
3902 | { | |
3903 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
3904 | tree basetype = BINFO_TYPE (base_binfo); | |
3905 | tree vbases; | |
3906 | ||
3907 | vbases = CLASSTYPE_VBASECLASSES (basetype); | |
3908 | while (vbases) | |
3909 | { | |
3910 | merge_overrides (binfo_member (BINFO_TYPE (vbases), | |
3911 | CLASSTYPE_VBASECLASSES (t)), | |
3912 | vbases, 1, t); | |
3913 | vbases = TREE_CHAIN (vbases); | |
3914 | } | |
3915 | } | |
3916 | } | |
8d08fdba MS |
3917 | } |
3918 | ||
2986ae00 MS |
3919 | /* Set up the DECL_FIELD_BITPOS of the vfield if we need to, as we |
3920 | might need to know it for setting up the offsets in the vtable | |
3921 | (or in thunks) below. */ | |
3922 | if (vfield != NULL_TREE | |
3923 | && DECL_FIELD_CONTEXT (vfield) != t) | |
3924 | { | |
3925 | tree binfo = get_binfo (DECL_FIELD_CONTEXT (vfield), t, 0); | |
3926 | tree offset = BINFO_OFFSET (binfo); | |
3927 | ||
3928 | vfield = copy_node (vfield); | |
3929 | copy_lang_decl (vfield); | |
3930 | ||
3931 | if (! integer_zerop (offset)) | |
3932 | offset = size_binop (MULT_EXPR, offset, size_int (BITS_PER_UNIT)); | |
3933 | DECL_FIELD_CONTEXT (vfield) = t; | |
3934 | DECL_CLASS_CONTEXT (vfield) = t; | |
3935 | DECL_FIELD_BITPOS (vfield) | |
3936 | = size_binop (PLUS_EXPR, offset, DECL_FIELD_BITPOS (vfield)); | |
3937 | CLASSTYPE_VFIELD (t) = vfield; | |
3938 | } | |
3939 | ||
8d08fdba MS |
3940 | #ifdef NOTQUITE |
3941 | cp_warning ("Doing hard virtuals for %T...", t); | |
3942 | #endif | |
db5ae43f MS |
3943 | |
3944 | if (has_virtual > max_has_virtual) | |
3945 | max_has_virtual = has_virtual; | |
3946 | if (max_has_virtual > 0) | |
3947 | TYPE_VIRTUAL_P (t) = 1; | |
3948 | ||
3949 | if (flag_rtti && TYPE_VIRTUAL_P (t) && !pending_hard_virtuals) | |
3950 | modify_all_vtables (t, NULL_TREE, NULL_TREE); | |
3951 | ||
8d08fdba MS |
3952 | while (pending_hard_virtuals) |
3953 | { | |
7177d104 MS |
3954 | modify_all_vtables (t, |
3955 | TREE_PURPOSE (pending_hard_virtuals), | |
3956 | TREE_VALUE (pending_hard_virtuals)); | |
8d08fdba MS |
3957 | pending_hard_virtuals = TREE_CHAIN (pending_hard_virtuals); |
3958 | } | |
72b7eeff MS |
3959 | |
3960 | if (TYPE_USES_VIRTUAL_BASECLASSES (t)) | |
3961 | { | |
3962 | tree vbases; | |
3963 | /* Now fixup any virtual function entries from virtual bases | |
3964 | that have different deltas. This has to come after we do the | |
3965 | pending hard virtuals, as we might have a function that comes | |
3966 | from multiple virtual base instances that is only overridden | |
3967 | by a hard virtual above. */ | |
3968 | vbases = CLASSTYPE_VBASECLASSES (t); | |
3969 | while (vbases) | |
3970 | { | |
3971 | /* We might be able to shorten the amount of work we do by | |
3972 | only doing this for vtables that come from virtual bases | |
3973 | that have differing offsets, but don't want to miss any | |
3974 | entries. */ | |
3975 | fixup_vtable_deltas (vbases, 1, t); | |
3976 | vbases = TREE_CHAIN (vbases); | |
3977 | } | |
3978 | } | |
3979 | ||
8d08fdba MS |
3980 | /* Under our model of GC, every C++ class gets its own virtual |
3981 | function table, at least virtually. */ | |
6b5fbb55 | 3982 | if (pending_virtuals) |
8d08fdba MS |
3983 | { |
3984 | pending_virtuals = nreverse (pending_virtuals); | |
3985 | /* We must enter these virtuals into the table. */ | |
3986 | if (first_vfn_base_index < 0) | |
3987 | { | |
f30432d7 MS |
3988 | /* The second slot is for the tdesc pointer when thunks are used. */ |
3989 | if (flag_vtable_thunks) | |
3990 | pending_virtuals = tree_cons (NULL_TREE, NULL_TREE, pending_virtuals); | |
3991 | ||
6b5fbb55 MS |
3992 | /* The first slot is for the rtti offset. */ |
3993 | pending_virtuals = tree_cons (NULL_TREE, NULL_TREE, pending_virtuals); | |
3994 | ||
46b02c6d | 3995 | set_rtti_entry (pending_virtuals, size_zero_node, t); |
8d08fdba MS |
3996 | build_vtable (NULL_TREE, t); |
3997 | } | |
3998 | else | |
3999 | { | |
4000 | /* Here we know enough to change the type of our virtual | |
4001 | function table, but we will wait until later this function. */ | |
4002 | ||
4003 | if (! BINFO_NEW_VTABLE_MARKED (TYPE_BINFO (t))) | |
4004 | build_vtable (TREE_VEC_ELT (TYPE_BINFO_BASETYPES (t), first_vfn_base_index), t); | |
8d08fdba MS |
4005 | } |
4006 | ||
4007 | /* If this type has basetypes with constructors, then those | |
4008 | constructors might clobber the virtual function table. But | |
4009 | they don't if the derived class shares the exact vtable of the base | |
4010 | class. */ | |
4011 | ||
4012 | CLASSTYPE_NEEDS_VIRTUAL_REINIT (t) = 1; | |
4013 | } | |
4014 | else if (first_vfn_base_index >= 0) | |
4015 | { | |
4016 | tree binfo = TREE_VEC_ELT (TYPE_BINFO_BASETYPES (t), first_vfn_base_index); | |
8d08fdba MS |
4017 | /* This class contributes nothing new to the virtual function |
4018 | table. However, it may have declared functions which | |
4019 | went into the virtual function table "inherited" from the | |
4020 | base class. If so, we grab a copy of those updated functions, | |
4021 | and pretend they are ours. */ | |
4022 | ||
4023 | /* See if we should steal the virtual info from base class. */ | |
4024 | if (TYPE_BINFO_VTABLE (t) == NULL_TREE) | |
4025 | TYPE_BINFO_VTABLE (t) = BINFO_VTABLE (binfo); | |
4026 | if (TYPE_BINFO_VIRTUALS (t) == NULL_TREE) | |
4027 | TYPE_BINFO_VIRTUALS (t) = BINFO_VIRTUALS (binfo); | |
4028 | if (TYPE_BINFO_VTABLE (t) != BINFO_VTABLE (binfo)) | |
4029 | CLASSTYPE_NEEDS_VIRTUAL_REINIT (t) = 1; | |
4030 | } | |
4031 | ||
8d08fdba MS |
4032 | if (max_has_virtual || first_vfn_base_index >= 0) |
4033 | { | |
8d08fdba MS |
4034 | CLASSTYPE_VSIZE (t) = has_virtual; |
4035 | if (first_vfn_base_index >= 0) | |
4036 | { | |
4037 | if (pending_virtuals) | |
4038 | TYPE_BINFO_VIRTUALS (t) = chainon (TYPE_BINFO_VIRTUALS (t), | |
4039 | pending_virtuals); | |
4040 | } | |
4041 | else if (has_virtual) | |
4042 | { | |
4043 | TYPE_BINFO_VIRTUALS (t) = pending_virtuals; | |
4044 | if (write_virtuals >= 0) | |
4045 | DECL_VIRTUAL_P (TYPE_BINFO_VTABLE (t)) = 1; | |
4046 | } | |
4047 | } | |
4048 | ||
4049 | /* Now lay out the virtual function table. */ | |
4050 | if (has_virtual) | |
4051 | { | |
4052 | tree atype, itype; | |
4053 | ||
4054 | if (TREE_TYPE (vfield) == ptr_type_node) | |
4055 | { | |
4056 | /* We must create a pointer to this table because | |
4057 | the one inherited from base class does not exist. | |
4058 | We will fill in the type when we know what it | |
4059 | should really be. Use `size_int' so values are memoized | |
4060 | in common cases. */ | |
4061 | itype = build_index_type (size_int (has_virtual)); | |
4062 | atype = build_array_type (vtable_entry_type, itype); | |
4063 | layout_type (atype); | |
4064 | TREE_TYPE (vfield) = build_pointer_type (atype); | |
4065 | } | |
4066 | else | |
4067 | { | |
4068 | atype = TREE_TYPE (TREE_TYPE (vfield)); | |
4069 | ||
4070 | if (has_virtual != TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (atype)))) | |
4071 | { | |
4072 | /* We must extend (or create) the boundaries on this array, | |
4073 | because we picked up virtual functions from multiple | |
4074 | base classes. */ | |
4075 | itype = build_index_type (size_int (has_virtual)); | |
4076 | atype = build_array_type (vtable_entry_type, itype); | |
4077 | layout_type (atype); | |
4078 | vfield = copy_node (vfield); | |
4079 | TREE_TYPE (vfield) = build_pointer_type (atype); | |
4080 | } | |
4081 | } | |
4082 | ||
4083 | CLASSTYPE_VFIELD (t) = vfield; | |
4084 | if (TREE_TYPE (TYPE_BINFO_VTABLE (t)) != atype) | |
4085 | { | |
4086 | TREE_TYPE (TYPE_BINFO_VTABLE (t)) = atype; | |
28cbf42c | 4087 | DECL_SIZE (TYPE_BINFO_VTABLE (t)) = 0; |
8d08fdba MS |
4088 | layout_decl (TYPE_BINFO_VTABLE (t), 0); |
4089 | /* At one time the vtable info was grabbed 2 words at a time. This | |
4090 | fails on sparc unless you have 8-byte alignment. (tiemann) */ | |
4091 | DECL_ALIGN (TYPE_BINFO_VTABLE (t)) | |
4092 | = MAX (TYPE_ALIGN (double_type_node), | |
4093 | DECL_ALIGN (TYPE_BINFO_VTABLE (t))); | |
4094 | } | |
4095 | } | |
4096 | else if (first_vfn_base_index >= 0) | |
4097 | CLASSTYPE_VFIELD (t) = vfield; | |
4098 | CLASSTYPE_VFIELDS (t) = vfields; | |
4099 | ||
4100 | finish_struct_bits (t, max_has_virtual); | |
4101 | ||
f30432d7 MS |
4102 | /* Complete the rtl for any static member objects of the type we're |
4103 | working on. */ | |
8d08fdba MS |
4104 | for (x = fields; x; x = TREE_CHAIN (x)) |
4105 | { | |
8d08fdba MS |
4106 | if (TREE_CODE (x) == VAR_DECL && TREE_STATIC (x) |
4107 | && TREE_TYPE (x) == t) | |
4108 | { | |
4109 | DECL_MODE (x) = TYPE_MODE (t); | |
4110 | make_decl_rtl (x, NULL, 0); | |
4111 | } | |
4112 | } | |
4113 | ||
8d08fdba MS |
4114 | if (TYPE_HAS_CONSTRUCTOR (t)) |
4115 | { | |
4116 | tree vfields = CLASSTYPE_VFIELDS (t); | |
4117 | ||
4118 | while (vfields) | |
4119 | { | |
4120 | /* Mark the fact that constructor for T | |
4121 | could affect anybody inheriting from T | |
4122 | who wants to initialize vtables for VFIELDS's type. */ | |
4123 | if (VF_DERIVED_VALUE (vfields)) | |
4124 | TREE_ADDRESSABLE (vfields) = 1; | |
4125 | vfields = TREE_CHAIN (vfields); | |
4126 | } | |
4127 | if (any_default_members != 0) | |
4128 | build_class_init_list (t); | |
4129 | } | |
4130 | else if (TYPE_NEEDS_CONSTRUCTING (t)) | |
4131 | build_class_init_list (t); | |
4132 | ||
700f8a87 MS |
4133 | /* Write out inline function definitions. */ |
4134 | do_inline_function_hair (t, CLASSTYPE_INLINE_FRIENDS (t)); | |
4135 | CLASSTYPE_INLINE_FRIENDS (t) = 0; | |
8d08fdba MS |
4136 | |
4137 | if (CLASSTYPE_VSIZE (t) != 0) | |
4138 | { | |
2986ae00 | 4139 | #if 0 |
e92cc029 | 4140 | /* This is now done above. */ |
8d08fdba MS |
4141 | if (DECL_FIELD_CONTEXT (vfield) != t) |
4142 | { | |
4143 | tree binfo = get_binfo (DECL_FIELD_CONTEXT (vfield), t, 0); | |
4144 | tree offset = BINFO_OFFSET (binfo); | |
4145 | ||
4146 | vfield = copy_node (vfield); | |
4147 | copy_lang_decl (vfield); | |
4148 | ||
4149 | if (! integer_zerop (offset)) | |
4150 | offset = size_binop (MULT_EXPR, offset, size_int (BITS_PER_UNIT)); | |
4151 | DECL_FIELD_CONTEXT (vfield) = t; | |
4152 | DECL_CLASS_CONTEXT (vfield) = t; | |
4153 | DECL_FIELD_BITPOS (vfield) | |
4154 | = size_binop (PLUS_EXPR, offset, DECL_FIELD_BITPOS (vfield)); | |
4155 | CLASSTYPE_VFIELD (t) = vfield; | |
4156 | } | |
2986ae00 | 4157 | #endif |
8d08fdba | 4158 | |
e92cc029 | 4159 | /* In addition to this one, all the other vfields should be listed. */ |
8d08fdba MS |
4160 | /* Before that can be done, we have to have FIELD_DECLs for them, and |
4161 | a place to find them. */ | |
4162 | TYPE_NONCOPIED_PARTS (t) = build_tree_list (default_conversion (TYPE_BINFO_VTABLE (t)), vfield); | |
4163 | ||
4164 | if (warn_nonvdtor && TYPE_HAS_DESTRUCTOR (t) | |
c91a56d2 | 4165 | && DECL_VINDEX (TREE_VEC_ELT (method_vec, 1)) == NULL_TREE) |
8d08fdba MS |
4166 | cp_warning ("`%#T' has virtual functions but non-virtual destructor", |
4167 | t); | |
4168 | } | |
4169 | ||
4170 | /* Make the rtl for any new vtables we have created, and unmark | |
4171 | the base types we marked. */ | |
7177d104 | 4172 | finish_vtbls (TYPE_BINFO (t), 1, t); |
8145f082 | 4173 | hack_incomplete_structures (t); |
8d08fdba | 4174 | |
a28e3c7f | 4175 | #if 0 |
8d08fdba MS |
4176 | if (TYPE_NAME (t) && TYPE_IDENTIFIER (t)) |
4177 | undo_template_name_overload (TYPE_IDENTIFIER (t), 1); | |
a28e3c7f | 4178 | #endif |
8d08fdba | 4179 | |
8d08fdba MS |
4180 | resume_momentary (old); |
4181 | ||
9e9ff709 MS |
4182 | if (warn_overloaded_virtual) |
4183 | warn_hidden (t); | |
8d08fdba MS |
4184 | |
4185 | #if 0 | |
4186 | /* This has to be done after we have sorted out what to do with | |
4187 | the enclosing type. */ | |
4188 | if (write_symbols != DWARF_DEBUG) | |
4189 | { | |
4190 | /* Be smarter about nested classes here. If a type is nested, | |
4191 | only output it if we would output the enclosing type. */ | |
d2e5ee5c MS |
4192 | if (DECL_CONTEXT (TYPE_MAIN_DECL (t)) |
4193 | && TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (TYPE_MAIN_DECL (t)))) == 't') | |
4194 | DECL_IGNORED_P (TYPE_MAIN_DECL (t)) = TREE_ASM_WRITTEN (TYPE_MAIN_DECL (t)); | |
8d08fdba MS |
4195 | } |
4196 | #endif | |
4197 | ||
faf5394a | 4198 | if (write_symbols != DWARF_DEBUG && write_symbols != DWARF2_DEBUG) |
8d08fdba MS |
4199 | { |
4200 | /* If the type has methods, we want to think about cutting down | |
4201 | the amount of symbol table stuff we output. The value stored in | |
4202 | the TYPE_DECL's DECL_IGNORED_P slot is a first approximation. | |
4203 | For example, if a member function is seen and we decide to | |
4204 | write out that member function, then we can change the value | |
4205 | of the DECL_IGNORED_P slot, and the type will be output when | |
9a3b49ac MS |
4206 | that member function's debug info is written out. |
4207 | ||
4208 | We can't do this with DWARF, which does not support name | |
4209 | references between translation units. */ | |
8d08fdba MS |
4210 | if (CLASSTYPE_METHOD_VEC (t)) |
4211 | { | |
4212 | extern tree pending_vtables; | |
4213 | ||
4214 | /* Don't output full info about any type | |
4215 | which does not have its implementation defined here. */ | |
4216 | if (TYPE_VIRTUAL_P (t) && write_virtuals == 2) | |
d2e5ee5c | 4217 | TYPE_DECL_SUPPRESS_DEBUG (TYPE_MAIN_DECL (t)) |
8d08fdba MS |
4218 | = (value_member (TYPE_IDENTIFIER (t), pending_vtables) == 0); |
4219 | else if (CLASSTYPE_INTERFACE_ONLY (t)) | |
d2e5ee5c | 4220 | TYPE_DECL_SUPPRESS_DEBUG (TYPE_MAIN_DECL (t)) = 1; |
5566b478 MS |
4221 | #if 0 |
4222 | /* XXX do something about this. */ | |
8d08fdba MS |
4223 | else if (CLASSTYPE_INTERFACE_UNKNOWN (t)) |
4224 | /* Only a first approximation! */ | |
d2e5ee5c | 4225 | TYPE_DECL_SUPPRESS_DEBUG (TYPE_MAIN_DECL (t)) = 1; |
5566b478 | 4226 | #endif |
8d08fdba MS |
4227 | } |
4228 | else if (CLASSTYPE_INTERFACE_ONLY (t)) | |
d2e5ee5c | 4229 | TYPE_DECL_SUPPRESS_DEBUG (TYPE_MAIN_DECL (t)) = 1; |
9a3b49ac | 4230 | } |
8d08fdba | 4231 | |
d2e5ee5c MS |
4232 | /* Finish debugging output for this type. */ |
4233 | rest_of_type_compilation (t, toplevel_bindings_p ()); | |
4234 | ||
8d08fdba MS |
4235 | return t; |
4236 | } | |
f30432d7 MS |
4237 | |
4238 | tree | |
2ee887f2 MS |
4239 | finish_struct (t, list_of_fieldlists, attributes, warn_anon) |
4240 | tree t, list_of_fieldlists, attributes; | |
f30432d7 MS |
4241 | int warn_anon; |
4242 | { | |
72b7eeff MS |
4243 | tree fields = NULL_TREE; |
4244 | tree *tail = &TYPE_METHODS (t); | |
75650646 MM |
4245 | tree specializations = NULL_TREE; |
4246 | tree *specialization_tail = &specializations; | |
f30432d7 MS |
4247 | tree name = TYPE_NAME (t); |
4248 | tree x, last_x = NULL_TREE; | |
be99da77 | 4249 | tree access; |
c91a56d2 | 4250 | tree dummy = NULL_TREE; |
75650646 | 4251 | tree next_x = NULL_TREE; |
f30432d7 MS |
4252 | |
4253 | if (TREE_CODE (name) == TYPE_DECL) | |
4254 | { | |
4255 | extern int lineno; | |
4256 | ||
4257 | DECL_SOURCE_FILE (name) = input_filename; | |
4258 | /* For TYPE_DECL that are not typedefs (those marked with a line | |
4259 | number of zero, we don't want to mark them as real typedefs. | |
4260 | If this fails one needs to make sure real typedefs have a | |
4261 | previous line number, even if it is wrong, that way the below | |
4262 | will fill in the right line number. (mrs) */ | |
4263 | if (DECL_SOURCE_LINE (name)) | |
4264 | DECL_SOURCE_LINE (name) = lineno; | |
4265 | CLASSTYPE_SOURCE_LINE (t) = lineno; | |
4266 | name = DECL_NAME (name); | |
4267 | } | |
4268 | ||
4269 | /* Append the fields we need for constructing signature tables. */ | |
4270 | if (IS_SIGNATURE (t)) | |
4271 | append_signature_fields (list_of_fieldlists); | |
4272 | ||
c91a56d2 MS |
4273 | /* Move our self-reference declaration to the end of the field list so |
4274 | any real field with the same name takes precedence. */ | |
4275 | if (list_of_fieldlists | |
4276 | && TREE_VALUE (list_of_fieldlists) | |
4277 | && DECL_ARTIFICIAL (TREE_VALUE (list_of_fieldlists))) | |
f30432d7 | 4278 | { |
c91a56d2 MS |
4279 | dummy = TREE_VALUE (list_of_fieldlists); |
4280 | list_of_fieldlists = TREE_CHAIN (list_of_fieldlists); | |
f30432d7 | 4281 | } |
c91a56d2 MS |
4282 | |
4283 | if (last_x && list_of_fieldlists) | |
4284 | TREE_CHAIN (last_x) = TREE_VALUE (list_of_fieldlists); | |
f30432d7 MS |
4285 | |
4286 | while (list_of_fieldlists) | |
4287 | { | |
be99da77 | 4288 | access = TREE_PURPOSE (list_of_fieldlists); |
f30432d7 | 4289 | |
c91a56d2 MS |
4290 | /* For signatures, we made all methods `public' in the parser and |
4291 | reported an error if a access specifier was used. */ | |
4292 | if (access == access_default_node) | |
4293 | { | |
4294 | if (CLASSTYPE_DECLARED_CLASS (t) == 0) | |
4295 | access = access_public_node; | |
4296 | else | |
4297 | access = access_private_node; | |
4298 | } | |
4299 | ||
75650646 | 4300 | for (x = TREE_VALUE (list_of_fieldlists); x; x = next_x) |
f30432d7 | 4301 | { |
75650646 MM |
4302 | next_x = TREE_CHAIN (x); |
4303 | ||
be99da77 MS |
4304 | TREE_PRIVATE (x) = access == access_private_node; |
4305 | TREE_PROTECTED (x) = access == access_protected_node; | |
f30432d7 | 4306 | |
43ee49e8 MM |
4307 | if (TREE_CODE (x) == TEMPLATE_DECL) |
4308 | { | |
4309 | TREE_PRIVATE (DECL_RESULT (x)) = TREE_PRIVATE (x); | |
4310 | TREE_PROTECTED (DECL_RESULT (x)) = TREE_PROTECTED (x); | |
4311 | } | |
4312 | ||
f30432d7 MS |
4313 | /* Check for inconsistent use of this name in the class body. |
4314 | Enums, types and static vars have already been checked. */ | |
cffa8729 | 4315 | if (TREE_CODE (x) != TYPE_DECL && TREE_CODE (x) != USING_DECL |
8d019cef JM |
4316 | && ! (TREE_CODE (x) == TEMPLATE_DECL |
4317 | && TREE_CODE (DECL_RESULT (x)) == TYPE_DECL) | |
f30432d7 MS |
4318 | && TREE_CODE (x) != CONST_DECL && TREE_CODE (x) != VAR_DECL) |
4319 | { | |
4320 | tree name = DECL_NAME (x); | |
4321 | tree icv; | |
4322 | ||
4323 | /* Don't get confused by access decls. */ | |
4324 | if (name && TREE_CODE (name) == IDENTIFIER_NODE) | |
4325 | icv = IDENTIFIER_CLASS_VALUE (name); | |
4326 | else | |
4327 | icv = NULL_TREE; | |
4328 | ||
4329 | if (icv | |
4330 | /* Don't complain about constructors. */ | |
4331 | && name != constructor_name (current_class_type) | |
4332 | /* Or inherited names. */ | |
4333 | && id_in_current_class (name) | |
4334 | /* Or shadowed tags. */ | |
4335 | && !(TREE_CODE (icv) == TYPE_DECL | |
4336 | && DECL_CONTEXT (icv) == t)) | |
4337 | { | |
4338 | cp_error_at ("declaration of identifier `%D' as `%+#D'", | |
4339 | name, x); | |
4340 | cp_error_at ("conflicts with other use in class as `%#D'", | |
4341 | icv); | |
4342 | } | |
4343 | } | |
4344 | ||
98c1c668 JM |
4345 | if (TREE_CODE (x) == FUNCTION_DECL |
4346 | || DECL_FUNCTION_TEMPLATE_P (x)) | |
f30432d7 | 4347 | { |
5566b478 | 4348 | DECL_CLASS_CONTEXT (x) = t; |
75650646 | 4349 | |
f30432d7 | 4350 | if (last_x) |
75650646 MM |
4351 | TREE_CHAIN (last_x) = next_x; |
4352 | ||
4353 | if (DECL_TEMPLATE_SPECIALIZATION (x)) | |
4354 | /* We don't enter the specialization into the class | |
4355 | method vector since specializations don't affect | |
4356 | overloading. Instead we keep track of the | |
4357 | specializations, and process them after the method | |
4358 | vector is complete. */ | |
4359 | { | |
4360 | *specialization_tail = x; | |
4361 | specialization_tail = &TREE_CHAIN (x); | |
4362 | TREE_CHAIN (x) = NULL_TREE; | |
4363 | continue; | |
4364 | } | |
4365 | ||
e92cc029 | 4366 | /* Link x onto end of TYPE_METHODS. */ |
f30432d7 MS |
4367 | *tail = x; |
4368 | tail = &TREE_CHAIN (x); | |
f30432d7 MS |
4369 | continue; |
4370 | } | |
4371 | ||
5566b478 MS |
4372 | if (TREE_CODE (x) != TYPE_DECL) |
4373 | DECL_FIELD_CONTEXT (x) = t; | |
f30432d7 MS |
4374 | |
4375 | if (! fields) | |
4376 | fields = x; | |
4377 | last_x = x; | |
4378 | } | |
4379 | list_of_fieldlists = TREE_CHAIN (list_of_fieldlists); | |
4380 | /* link the tail while we have it! */ | |
4381 | if (last_x) | |
4382 | { | |
4383 | TREE_CHAIN (last_x) = NULL_TREE; | |
4384 | ||
4385 | if (list_of_fieldlists | |
4386 | && TREE_VALUE (list_of_fieldlists) | |
4387 | && TREE_CODE (TREE_VALUE (list_of_fieldlists)) != FUNCTION_DECL) | |
4388 | TREE_CHAIN (last_x) = TREE_VALUE (list_of_fieldlists); | |
4389 | } | |
4390 | } | |
4391 | ||
5566b478 MS |
4392 | /* Now add the tags, if any, to the list of TYPE_DECLs |
4393 | defined for this type. */ | |
c91a56d2 | 4394 | if (CLASSTYPE_TAGS (t) || dummy) |
5566b478 | 4395 | { |
5156628f MS |
4396 | /* The list of tags was built up in pushtag in reverse order; we need |
4397 | to fix that so that enumerators will be processed in forward order | |
4398 | in template instantiation. */ | |
4399 | CLASSTYPE_TAGS (t) = x = nreverse (CLASSTYPE_TAGS (t)); | |
5566b478 MS |
4400 | while (x) |
4401 | { | |
d2e5ee5c | 4402 | tree tag = TYPE_MAIN_DECL (TREE_VALUE (x)); |
5566b478 | 4403 | |
5566b478 MS |
4404 | TREE_NONLOCAL_FLAG (TREE_VALUE (x)) = 0; |
4405 | x = TREE_CHAIN (x); | |
4406 | last_x = chainon (last_x, tag); | |
4407 | } | |
c91a56d2 MS |
4408 | if (dummy) |
4409 | last_x = chainon (last_x, dummy); | |
5566b478 MS |
4410 | if (fields == NULL_TREE) |
4411 | fields = last_x; | |
4412 | CLASSTYPE_LOCAL_TYPEDECLS (t) = 1; | |
4413 | } | |
4414 | ||
f30432d7 | 4415 | *tail = NULL_TREE; |
f30432d7 MS |
4416 | TYPE_FIELDS (t) = fields; |
4417 | ||
6467930b MS |
4418 | cplus_decl_attributes (t, attributes, NULL_TREE); |
4419 | ||
5566b478 | 4420 | if (processing_template_decl) |
f30432d7 | 4421 | { |
5566b478 MS |
4422 | tree d = getdecls (); |
4423 | for (; d; d = TREE_CHAIN (d)) | |
4424 | { | |
4425 | /* If this is the decl for the class or one of the template | |
4426 | parms, we've seen all the injected decls. */ | |
4427 | if ((TREE_CODE (d) == TYPE_DECL | |
4428 | && (TREE_TYPE (d) == t | |
73b0fce8 KL |
4429 | || TREE_CODE (TREE_TYPE (d)) == TEMPLATE_TYPE_PARM |
4430 | || TREE_CODE (TREE_TYPE (d)) == TEMPLATE_TEMPLATE_PARM)) | |
5566b478 MS |
4431 | || TREE_CODE (d) == CONST_DECL) |
4432 | break; | |
a80e4195 MS |
4433 | /* Don't inject cache decls. */ |
4434 | else if (IDENTIFIER_TEMPLATE (DECL_NAME (d))) | |
5566b478 MS |
4435 | continue; |
4436 | DECL_TEMPLATE_INJECT (CLASSTYPE_TI_TEMPLATE (t)) | |
4437 | = tree_cons (NULL_TREE, d, | |
4438 | DECL_TEMPLATE_INJECT (CLASSTYPE_TI_TEMPLATE (t))); | |
4439 | } | |
72b7eeff MS |
4440 | CLASSTYPE_METHOD_VEC (t) |
4441 | = finish_struct_methods (t, TYPE_METHODS (t), 1); | |
5566b478 MS |
4442 | TYPE_SIZE (t) = integer_zero_node; |
4443 | } | |
f30432d7 | 4444 | else |
6467930b | 4445 | t = finish_struct_1 (t, warn_anon); |
5566b478 MS |
4446 | |
4447 | TYPE_BEING_DEFINED (t) = 0; | |
4448 | ||
b7a29012 | 4449 | /* Now, figure out which member templates we're specializing. */ |
75650646 MM |
4450 | for (x = specializations; x != NULL_TREE; x = TREE_CHAIN (x)) |
4451 | { | |
4452 | tree spec_args; | |
4453 | tree fn; | |
e1467ff2 | 4454 | int pending_specialization; |
75650646 MM |
4455 | |
4456 | if (uses_template_parms (t)) | |
4457 | /* If t is a template class, and x is a specialization, then x | |
4458 | is itself really a template. Due to the vagaries of the | |
4459 | parser, however, we will have a handle to a function | |
4460 | declaration, rather than the template declaration, at this | |
4461 | point. */ | |
4462 | { | |
4463 | my_friendly_assert (DECL_TEMPLATE_INFO (x) != NULL_TREE, 0); | |
4464 | my_friendly_assert (DECL_TI_TEMPLATE (x) != NULL_TREE, 0); | |
4465 | fn = DECL_TI_TEMPLATE (x); | |
4466 | } | |
4467 | else | |
4468 | fn = x; | |
4469 | ||
4470 | /* We want the specialization arguments, which will be the | |
4471 | innermost ones. */ | |
4472 | if (DECL_TI_ARGS (fn) && TREE_CODE (DECL_TI_ARGS (fn)) == TREE_VEC) | |
4473 | spec_args | |
4474 | = TREE_VEC_ELT (DECL_TI_ARGS (fn), 0); | |
4475 | else | |
4476 | spec_args = DECL_TI_ARGS (fn); | |
4477 | ||
e1467ff2 MM |
4478 | pending_specialization |
4479 | = TI_PENDING_SPECIALIZATION_FLAG (DECL_TEMPLATE_INFO (fn)); | |
75650646 MM |
4480 | check_explicit_specialization |
4481 | (lookup_template_function (DECL_NAME (fn), spec_args), | |
e1467ff2 MM |
4482 | fn, 0, 1 | (8 * pending_specialization)); |
4483 | TI_PENDING_SPECIALIZATION_FLAG (DECL_TEMPLATE_INFO (fn)) = 0; | |
75650646 MM |
4484 | |
4485 | /* Now, the assembler name will be correct for fn, so we | |
4486 | make its RTL. */ | |
4487 | DECL_RTL (fn) = 0; | |
4488 | make_decl_rtl (fn, NULL_PTR, 1); | |
4489 | ||
4490 | if (x != fn) | |
4491 | { | |
4492 | DECL_RTL (x) = 0; | |
4493 | make_decl_rtl (x, NULL_PTR, 1); | |
4494 | } | |
4495 | } | |
4496 | ||
5566b478 MS |
4497 | if (current_class_type) |
4498 | popclass (0); | |
4499 | else | |
4500 | error ("trying to finish struct, but kicked out due to previous parse errors."); | |
4501 | ||
4502 | return t; | |
f30432d7 | 4503 | } |
8d08fdba MS |
4504 | \f |
4505 | /* Return non-zero if the effective type of INSTANCE is static. | |
4506 | Used to determine whether the virtual function table is needed | |
4507 | or not. | |
4508 | ||
4509 | *NONNULL is set iff INSTANCE can be known to be nonnull, regardless | |
4510 | of our knowledge of its type. */ | |
e92cc029 | 4511 | |
8d08fdba MS |
4512 | int |
4513 | resolves_to_fixed_type_p (instance, nonnull) | |
4514 | tree instance; | |
4515 | int *nonnull; | |
4516 | { | |
4517 | switch (TREE_CODE (instance)) | |
4518 | { | |
4519 | case INDIRECT_REF: | |
4520 | /* Check that we are not going through a cast of some sort. */ | |
4521 | if (TREE_TYPE (instance) | |
4522 | == TREE_TYPE (TREE_TYPE (TREE_OPERAND (instance, 0)))) | |
4523 | instance = TREE_OPERAND (instance, 0); | |
4524 | /* fall through... */ | |
4525 | case CALL_EXPR: | |
4526 | /* This is a call to a constructor, hence it's never zero. */ | |
4527 | if (TREE_HAS_CONSTRUCTOR (instance)) | |
4528 | { | |
4529 | if (nonnull) | |
4530 | *nonnull = 1; | |
4531 | return 1; | |
4532 | } | |
4533 | return 0; | |
4534 | ||
4535 | case SAVE_EXPR: | |
4536 | /* This is a call to a constructor, hence it's never zero. */ | |
4537 | if (TREE_HAS_CONSTRUCTOR (instance)) | |
4538 | { | |
4539 | if (nonnull) | |
4540 | *nonnull = 1; | |
4541 | return 1; | |
4542 | } | |
4543 | return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); | |
4544 | ||
4545 | case RTL_EXPR: | |
8d08fdba MS |
4546 | return 0; |
4547 | ||
4548 | case PLUS_EXPR: | |
4549 | case MINUS_EXPR: | |
4550 | if (TREE_CODE (TREE_OPERAND (instance, 1)) == INTEGER_CST) | |
4551 | /* Propagate nonnull. */ | |
4552 | resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); | |
4553 | if (TREE_CODE (TREE_OPERAND (instance, 0)) == ADDR_EXPR) | |
4554 | return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); | |
4555 | return 0; | |
4556 | ||
4557 | case NOP_EXPR: | |
4558 | case CONVERT_EXPR: | |
4559 | return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); | |
4560 | ||
4561 | case ADDR_EXPR: | |
4562 | if (nonnull) | |
4563 | *nonnull = 1; | |
4564 | return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); | |
4565 | ||
4566 | case COMPONENT_REF: | |
4567 | return resolves_to_fixed_type_p (TREE_OPERAND (instance, 1), nonnull); | |
4568 | ||
8d08fdba MS |
4569 | case VAR_DECL: |
4570 | case FIELD_DECL: | |
4571 | if (TREE_CODE (TREE_TYPE (instance)) == ARRAY_TYPE | |
4572 | && IS_AGGR_TYPE (TREE_TYPE (TREE_TYPE (instance)))) | |
4573 | { | |
4574 | if (nonnull) | |
4575 | *nonnull = 1; | |
4576 | return 1; | |
4577 | } | |
e92cc029 | 4578 | /* fall through... */ |
8d08fdba MS |
4579 | case TARGET_EXPR: |
4580 | case PARM_DECL: | |
4581 | if (IS_AGGR_TYPE (TREE_TYPE (instance))) | |
4582 | { | |
4583 | if (nonnull) | |
4584 | *nonnull = 1; | |
4585 | return 1; | |
4586 | } | |
4587 | else if (nonnull) | |
4588 | { | |
4ac14744 | 4589 | if (instance == current_class_ptr |
8d08fdba MS |
4590 | && flag_this_is_variable <= 0) |
4591 | { | |
4592 | /* Some people still use `this = 0' inside destructors. */ | |
4593 | *nonnull = ! DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (current_function_decl)); | |
4594 | /* In a constructor, we know our type. */ | |
4595 | if (flag_this_is_variable < 0) | |
4596 | return 1; | |
4597 | } | |
4598 | else if (TREE_CODE (TREE_TYPE (instance)) == REFERENCE_TYPE) | |
4599 | /* Reference variables should be references to objects. */ | |
4600 | *nonnull = 1; | |
4601 | } | |
4602 | return 0; | |
4603 | ||
4604 | default: | |
4605 | return 0; | |
4606 | } | |
4607 | } | |
4608 | \f | |
4609 | void | |
4610 | init_class_processing () | |
4611 | { | |
4612 | current_class_depth = 0; | |
4613 | current_class_stacksize = 10; | |
4614 | current_class_base = (tree *)xmalloc(current_class_stacksize * sizeof (tree)); | |
4615 | current_class_stack = current_class_base; | |
4616 | ||
4617 | current_lang_stacksize = 10; | |
4618 | current_lang_base = (tree *)xmalloc(current_lang_stacksize * sizeof (tree)); | |
4619 | current_lang_stack = current_lang_base; | |
4620 | ||
be99da77 MS |
4621 | access_default_node = build_int_2 (0, 0); |
4622 | access_public_node = build_int_2 (1, 0); | |
4623 | access_protected_node = build_int_2 (2, 0); | |
4624 | access_private_node = build_int_2 (3, 0); | |
4625 | access_default_virtual_node = build_int_2 (4, 0); | |
4626 | access_public_virtual_node = build_int_2 (5, 0); | |
d8b55a76 JM |
4627 | access_protected_virtual_node = build_int_2 (6, 0); |
4628 | access_private_virtual_node = build_int_2 (7, 0); | |
be99da77 | 4629 | |
8d08fdba | 4630 | /* Keep these values lying around. */ |
8d08fdba MS |
4631 | base_layout_decl = build_lang_field_decl (FIELD_DECL, NULL_TREE, error_mark_node); |
4632 | TREE_TYPE (base_layout_decl) = make_node (RECORD_TYPE); | |
4633 | ||
4634 | gcc_obstack_init (&class_obstack); | |
4635 | } | |
4636 | ||
4637 | /* Set current scope to NAME. CODE tells us if this is a | |
4638 | STRUCT, UNION, or ENUM environment. | |
4639 | ||
4640 | NAME may end up being NULL_TREE if this is an anonymous or | |
4641 | late-bound struct (as in "struct { ... } foo;") */ | |
4642 | ||
4643 | /* Set global variables CURRENT_CLASS_NAME and CURRENT_CLASS_TYPE to | |
4644 | appropriate values, found by looking up the type definition of | |
4645 | NAME (as a CODE). | |
4646 | ||
4647 | If MODIFY is 1, we set IDENTIFIER_CLASS_VALUE's of names | |
4648 | which can be seen locally to the class. They are shadowed by | |
4649 | any subsequent local declaration (including parameter names). | |
4650 | ||
4651 | If MODIFY is 2, we set IDENTIFIER_CLASS_VALUE's of names | |
4652 | which have static meaning (i.e., static members, static | |
4653 | member functions, enum declarations, etc). | |
4654 | ||
4655 | If MODIFY is 3, we set IDENTIFIER_CLASS_VALUE of names | |
4656 | which can be seen locally to the class (as in 1), but | |
4657 | know that we are doing this for declaration purposes | |
4658 | (i.e. friend foo::bar (int)). | |
4659 | ||
4660 | So that we may avoid calls to lookup_name, we cache the _TYPE | |
4661 | nodes of local TYPE_DECLs in the TREE_TYPE field of the name. | |
4662 | ||
4663 | For multiple inheritance, we perform a two-pass depth-first search | |
4664 | of the type lattice. The first pass performs a pre-order search, | |
4665 | marking types after the type has had its fields installed in | |
4666 | the appropriate IDENTIFIER_CLASS_VALUE slot. The second pass merely | |
4667 | unmarks the marked types. If a field or member function name | |
4668 | appears in an ambiguous way, the IDENTIFIER_CLASS_VALUE of | |
4669 | that name becomes `error_mark_node'. */ | |
4670 | ||
4671 | void | |
4672 | pushclass (type, modify) | |
4673 | tree type; | |
4674 | int modify; | |
4675 | { | |
4676 | push_memoized_context (type, modify); | |
4677 | ||
4678 | current_class_depth++; | |
4679 | *current_class_stack++ = current_class_name; | |
4680 | *current_class_stack++ = current_class_type; | |
4681 | if (current_class_stack >= current_class_base + current_class_stacksize) | |
4682 | { | |
beb53fb8 JM |
4683 | current_class_base |
4684 | = (tree *)xrealloc (current_class_base, | |
4685 | sizeof (tree) * (current_class_stacksize + 10)); | |
8d08fdba MS |
4686 | current_class_stack = current_class_base + current_class_stacksize; |
4687 | current_class_stacksize += 10; | |
4688 | } | |
4689 | ||
4690 | current_class_name = TYPE_NAME (type); | |
4691 | if (TREE_CODE (current_class_name) == TYPE_DECL) | |
4692 | current_class_name = DECL_NAME (current_class_name); | |
4693 | current_class_type = type; | |
4694 | ||
4695 | if (previous_class_type != NULL_TREE | |
4696 | && (type != previous_class_type || TYPE_SIZE (previous_class_type) == NULL_TREE) | |
4697 | && current_class_depth == 1) | |
4698 | { | |
4699 | /* Forcibly remove any old class remnants. */ | |
4700 | popclass (-1); | |
4701 | previous_class_type = NULL_TREE; | |
4702 | } | |
4703 | ||
4704 | pushlevel_class (); | |
4705 | ||
37c46b43 | 4706 | #if 0 |
5566b478 MS |
4707 | if (CLASSTYPE_TEMPLATE_INFO (type)) |
4708 | overload_template_name (type); | |
37c46b43 | 4709 | #endif |
5566b478 | 4710 | |
8d08fdba MS |
4711 | if (modify) |
4712 | { | |
4713 | tree tags; | |
4714 | tree this_fndecl = current_function_decl; | |
4715 | ||
4716 | if (current_function_decl | |
4717 | && DECL_CONTEXT (current_function_decl) | |
4718 | && TREE_CODE (DECL_CONTEXT (current_function_decl)) == FUNCTION_DECL) | |
4719 | current_function_decl = DECL_CONTEXT (current_function_decl); | |
4720 | else | |
4721 | current_function_decl = NULL_TREE; | |
4722 | ||
5566b478 | 4723 | if (type != previous_class_type || current_class_depth > 1) |
8d08fdba | 4724 | { |
22531e51 | 4725 | #ifdef MI_MATRIX |
8d08fdba | 4726 | build_mi_matrix (type); |
45537677 | 4727 | push_class_decls (type); |
8d08fdba | 4728 | free_mi_matrix (); |
22531e51 JM |
4729 | #else |
4730 | push_class_decls (type); | |
4731 | #endif | |
8d08fdba MS |
4732 | } |
4733 | else | |
4734 | { | |
4735 | tree item; | |
4736 | ||
ddd5a7c1 | 4737 | /* Hooray, we successfully cached; let's just install the |
8d08fdba MS |
4738 | cached class_shadowed list, and walk through it to get the |
4739 | IDENTIFIER_TYPE_VALUEs correct. */ | |
4740 | set_class_shadows (previous_class_values); | |
4741 | for (item = previous_class_values; item; item = TREE_CHAIN (item)) | |
4742 | { | |
4743 | tree id = TREE_PURPOSE (item); | |
4744 | tree decl = IDENTIFIER_CLASS_VALUE (id); | |
4745 | ||
4746 | if (TREE_CODE (decl) == TYPE_DECL) | |
4747 | set_identifier_type_value (id, TREE_TYPE (decl)); | |
4748 | } | |
4749 | unuse_fields (type); | |
4750 | } | |
4751 | ||
4752 | for (tags = CLASSTYPE_TAGS (type); tags; tags = TREE_CHAIN (tags)) | |
4753 | { | |
4754 | TREE_NONLOCAL_FLAG (TREE_VALUE (tags)) = 1; | |
4755 | if (! TREE_PURPOSE (tags)) | |
4756 | continue; | |
4757 | pushtag (TREE_PURPOSE (tags), TREE_VALUE (tags), 0); | |
4758 | } | |
4759 | ||
4760 | current_function_decl = this_fndecl; | |
4761 | } | |
8d08fdba MS |
4762 | } |
4763 | ||
4764 | /* Get out of the current class scope. If we were in a class scope | |
700f8a87 MS |
4765 | previously, that is the one popped to. The flag MODIFY tells whether |
4766 | the current scope declarations needs to be modified as a result of | |
4767 | popping to the previous scope. 0 is used for class definitions. */ | |
e92cc029 | 4768 | |
8d08fdba MS |
4769 | void |
4770 | popclass (modify) | |
4771 | int modify; | |
4772 | { | |
8d08fdba MS |
4773 | if (modify < 0) |
4774 | { | |
4775 | /* Back this old class out completely. */ | |
4776 | tree tags = CLASSTYPE_TAGS (previous_class_type); | |
4777 | tree t; | |
4778 | ||
4779 | /* This code can be seen as a cache miss. When we've cached a | |
4780 | class' scope's bindings and we can't use them, we need to reset | |
4781 | them. This is it! */ | |
700f8a87 | 4782 | for (t = previous_class_values; t; t = TREE_CHAIN (t)) |
8d08fdba MS |
4783 | IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (t)) = NULL_TREE; |
4784 | while (tags) | |
4785 | { | |
4786 | TREE_NONLOCAL_FLAG (TREE_VALUE (tags)) = 0; | |
4787 | tags = TREE_CHAIN (tags); | |
4788 | } | |
4789 | goto ret; | |
4790 | } | |
4791 | ||
4792 | if (modify) | |
4793 | { | |
4794 | /* Just remove from this class what didn't make | |
4795 | it into IDENTIFIER_CLASS_VALUE. */ | |
4796 | tree tags = CLASSTYPE_TAGS (current_class_type); | |
4797 | ||
4798 | while (tags) | |
4799 | { | |
4800 | TREE_NONLOCAL_FLAG (TREE_VALUE (tags)) = 0; | |
4801 | tags = TREE_CHAIN (tags); | |
4802 | } | |
4803 | } | |
8d08fdba | 4804 | |
700f8a87 MS |
4805 | /* Force clearing of IDENTIFIER_CLASS_VALUEs after a class definition, |
4806 | since not all class decls make it there currently. */ | |
4807 | poplevel_class (! modify); | |
8d08fdba MS |
4808 | |
4809 | /* Since poplevel_class does the popping of class decls nowadays, | |
4810 | this really only frees the obstack used for these decls. | |
4811 | That's why it had to be moved down here. */ | |
4812 | if (modify) | |
5566b478 | 4813 | pop_class_decls (); |
8d08fdba MS |
4814 | |
4815 | current_class_depth--; | |
4816 | current_class_type = *--current_class_stack; | |
4817 | current_class_name = *--current_class_stack; | |
4818 | ||
8d08fdba MS |
4819 | pop_memoized_context (modify); |
4820 | ||
4821 | ret: | |
4822 | ; | |
4823 | } | |
4824 | ||
4825 | /* When entering a class scope, all enclosing class scopes' names with | |
4826 | static meaning (static variables, static functions, types and enumerators) | |
4827 | have to be visible. This recursive function calls pushclass for all | |
4828 | enclosing class contexts until global or a local scope is reached. | |
4829 | TYPE is the enclosed class and MODIFY is equivalent with the pushclass | |
4830 | formal of the same name. */ | |
4831 | ||
4832 | void | |
4833 | push_nested_class (type, modify) | |
4834 | tree type; | |
4835 | int modify; | |
4836 | { | |
a28e3c7f MS |
4837 | tree context; |
4838 | ||
5566b478 | 4839 | if (type == NULL_TREE || type == error_mark_node || ! IS_AGGR_TYPE (type) |
73b0fce8 KL |
4840 | || TREE_CODE (type) == TEMPLATE_TYPE_PARM |
4841 | || TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM) | |
a28e3c7f MS |
4842 | return; |
4843 | ||
d2e5ee5c | 4844 | context = DECL_CONTEXT (TYPE_MAIN_DECL (type)); |
8d08fdba MS |
4845 | |
4846 | if (context && TREE_CODE (context) == RECORD_TYPE) | |
4847 | push_nested_class (context, 2); | |
4848 | pushclass (type, modify); | |
4849 | } | |
4850 | ||
4851 | /* Undoes a push_nested_class call. MODIFY is passed on to popclass. */ | |
4852 | ||
4853 | void | |
4854 | pop_nested_class (modify) | |
4855 | int modify; | |
4856 | { | |
d2e5ee5c | 4857 | tree context = DECL_CONTEXT (TYPE_MAIN_DECL (current_class_type)); |
8d08fdba MS |
4858 | |
4859 | popclass (modify); | |
4860 | if (context && TREE_CODE (context) == RECORD_TYPE) | |
4861 | pop_nested_class (modify); | |
4862 | } | |
4863 | ||
4864 | /* Set global variables CURRENT_LANG_NAME to appropriate value | |
4865 | so that behavior of name-mangling machinery is correct. */ | |
4866 | ||
4867 | void | |
4868 | push_lang_context (name) | |
4869 | tree name; | |
4870 | { | |
4871 | *current_lang_stack++ = current_lang_name; | |
4872 | if (current_lang_stack >= current_lang_base + current_lang_stacksize) | |
4873 | { | |
beb53fb8 JM |
4874 | current_lang_base |
4875 | = (tree *)xrealloc (current_lang_base, | |
4876 | sizeof (tree) * (current_lang_stacksize + 10)); | |
8d08fdba MS |
4877 | current_lang_stack = current_lang_base + current_lang_stacksize; |
4878 | current_lang_stacksize += 10; | |
4879 | } | |
4880 | ||
a1774733 | 4881 | if (name == lang_name_cplusplus || name == lang_name_java) |
8d08fdba MS |
4882 | { |
4883 | strict_prototype = strict_prototypes_lang_cplusplus; | |
4884 | current_lang_name = name; | |
4885 | } | |
4886 | else if (name == lang_name_c) | |
4887 | { | |
4888 | strict_prototype = strict_prototypes_lang_c; | |
4889 | current_lang_name = name; | |
4890 | } | |
4891 | else | |
4892 | error ("language string `\"%s\"' not recognized", IDENTIFIER_POINTER (name)); | |
8d08fdba MS |
4893 | } |
4894 | ||
4895 | /* Get out of the current language scope. */ | |
e92cc029 | 4896 | |
8d08fdba MS |
4897 | void |
4898 | pop_lang_context () | |
4899 | { | |
8d08fdba MS |
4900 | current_lang_name = *--current_lang_stack; |
4901 | if (current_lang_name == lang_name_cplusplus) | |
4902 | strict_prototype = strict_prototypes_lang_cplusplus; | |
4903 | else if (current_lang_name == lang_name_c) | |
4904 | strict_prototype = strict_prototypes_lang_c; | |
4905 | } | |
8d08fdba MS |
4906 | \f |
4907 | /* Type instantiation routines. */ | |
4908 | ||
2c73f9f5 ML |
4909 | static tree |
4910 | validate_lhs (lhstype, complain) | |
4911 | tree lhstype; | |
4912 | int complain; | |
4913 | { | |
4914 | if (TYPE_PTRMEMFUNC_P (lhstype)) | |
4915 | lhstype = TYPE_PTRMEMFUNC_FN_TYPE (lhstype); | |
4916 | ||
4917 | if (TREE_CODE (lhstype) == POINTER_TYPE) | |
4918 | { | |
4919 | if (TREE_CODE (TREE_TYPE (lhstype)) == FUNCTION_TYPE | |
4920 | || TREE_CODE (TREE_TYPE (lhstype)) == METHOD_TYPE) | |
4921 | lhstype = TREE_TYPE (lhstype); | |
4922 | else | |
4923 | { | |
4924 | if (complain) | |
4925 | error ("invalid type combination for overload"); | |
4926 | return error_mark_node; | |
4927 | } | |
4928 | } | |
4929 | return lhstype; | |
4930 | } | |
4931 | ||
ec255269 MS |
4932 | /* This function will instantiate the type of the expression given in |
4933 | RHS to match the type of LHSTYPE. If errors exist, then return | |
4934 | error_mark_node. If only complain is COMPLAIN is set. If we are | |
4935 | not complaining, never modify rhs, as overload resolution wants to | |
4936 | try many possible instantiations, in hopes that at least one will | |
4937 | work. | |
8d08fdba MS |
4938 | |
4939 | This function is used in build_modify_expr, convert_arguments, | |
4940 | build_c_cast, and compute_conversion_costs. */ | |
e92cc029 | 4941 | |
8d08fdba MS |
4942 | tree |
4943 | instantiate_type (lhstype, rhs, complain) | |
4944 | tree lhstype, rhs; | |
4945 | int complain; | |
4946 | { | |
386b8a85 JM |
4947 | tree explicit_targs = NULL_TREE; |
4948 | ||
8d08fdba MS |
4949 | if (TREE_CODE (lhstype) == UNKNOWN_TYPE) |
4950 | { | |
4951 | if (complain) | |
4952 | error ("not enough type information"); | |
4953 | return error_mark_node; | |
4954 | } | |
4955 | ||
4956 | if (TREE_TYPE (rhs) != NULL_TREE && ! (type_unknown_p (rhs))) | |
abff8e06 JM |
4957 | { |
4958 | if (comptypes (lhstype, TREE_TYPE (rhs), 1)) | |
4959 | return rhs; | |
4960 | if (complain) | |
4961 | cp_error ("argument of type `%T' does not match `%T'", | |
4962 | TREE_TYPE (rhs), lhstype); | |
4963 | return error_mark_node; | |
4964 | } | |
8d08fdba | 4965 | |
2c73f9f5 ML |
4966 | /* We don't overwrite rhs if it is an overloaded function. |
4967 | Copying it would destroy the tree link. */ | |
4968 | if (TREE_CODE (rhs) != OVERLOAD) | |
4969 | rhs = copy_node (rhs); | |
c73964b2 | 4970 | |
8d08fdba MS |
4971 | /* This should really only be used when attempting to distinguish |
4972 | what sort of a pointer to function we have. For now, any | |
4973 | arithmetic operation which is not supported on pointers | |
4974 | is rejected as an error. */ | |
4975 | ||
4976 | switch (TREE_CODE (rhs)) | |
4977 | { | |
4978 | case TYPE_EXPR: | |
4979 | case CONVERT_EXPR: | |
4980 | case SAVE_EXPR: | |
4981 | case CONSTRUCTOR: | |
4982 | case BUFFER_REF: | |
4983 | my_friendly_abort (177); | |
4984 | return error_mark_node; | |
4985 | ||
4986 | case INDIRECT_REF: | |
4987 | case ARRAY_REF: | |
ec255269 MS |
4988 | { |
4989 | tree new_rhs; | |
8d08fdba | 4990 | |
ec255269 MS |
4991 | new_rhs = instantiate_type (build_pointer_type (lhstype), |
4992 | TREE_OPERAND (rhs, 0), complain); | |
4993 | if (new_rhs == error_mark_node) | |
4994 | return error_mark_node; | |
4995 | ||
4996 | TREE_TYPE (rhs) = lhstype; | |
4997 | TREE_OPERAND (rhs, 0) = new_rhs; | |
4998 | return rhs; | |
4999 | } | |
8d08fdba MS |
5000 | |
5001 | case NOP_EXPR: | |
5002 | rhs = copy_node (TREE_OPERAND (rhs, 0)); | |
5003 | TREE_TYPE (rhs) = unknown_type_node; | |
5004 | return instantiate_type (lhstype, rhs, complain); | |
5005 | ||
5006 | case COMPONENT_REF: | |
5007 | { | |
5008 | tree field = TREE_OPERAND (rhs, 1); | |
5009 | if (TREE_CODE (field) == TREE_LIST) | |
5010 | { | |
5011 | tree function = instantiate_type (lhstype, field, complain); | |
5012 | if (function == error_mark_node) | |
5013 | return error_mark_node; | |
5014 | my_friendly_assert (TREE_CODE (function) == FUNCTION_DECL, 185); | |
5015 | if (DECL_VINDEX (function)) | |
5016 | { | |
5017 | tree base = TREE_OPERAND (rhs, 0); | |
5018 | tree base_ptr = build_unary_op (ADDR_EXPR, base, 0); | |
5019 | if (base_ptr == error_mark_node) | |
5020 | return error_mark_node; | |
5021 | base_ptr = convert_pointer_to (DECL_CONTEXT (function), base_ptr); | |
5022 | if (base_ptr == error_mark_node) | |
5023 | return error_mark_node; | |
5024 | return build_vfn_ref (&base_ptr, base, DECL_VINDEX (function)); | |
5025 | } | |
72b7eeff | 5026 | mark_used (function); |
8d08fdba MS |
5027 | return function; |
5028 | } | |
5029 | ||
2c73f9f5 ML |
5030 | /* I could not trigger this code. MvL */ |
5031 | my_friendly_abort (980326); | |
5032 | #if 0 | |
8d08fdba MS |
5033 | my_friendly_assert (TREE_CODE (field) == FIELD_DECL, 178); |
5034 | my_friendly_assert (!(TREE_CODE (TREE_TYPE (field)) == FUNCTION_TYPE | |
5035 | || TREE_CODE (TREE_TYPE (field)) == METHOD_TYPE), | |
5036 | 179); | |
5037 | ||
5038 | TREE_TYPE (rhs) = lhstype; | |
5039 | /* First look for an exact match */ | |
5040 | ||
5041 | while (field && TREE_TYPE (field) != lhstype) | |
e1cd6e56 | 5042 | field = DECL_CHAIN (field); |
8d08fdba MS |
5043 | if (field) |
5044 | { | |
5045 | TREE_OPERAND (rhs, 1) = field; | |
72b7eeff | 5046 | mark_used (field); |
8d08fdba MS |
5047 | return rhs; |
5048 | } | |
5049 | ||
5050 | /* No exact match found, look for a compatible function. */ | |
5051 | field = TREE_OPERAND (rhs, 1); | |
5052 | while (field && ! comptypes (lhstype, TREE_TYPE (field), 0)) | |
e1cd6e56 | 5053 | field = DECL_CHAIN (field); |
8d08fdba MS |
5054 | if (field) |
5055 | { | |
5056 | TREE_OPERAND (rhs, 1) = field; | |
e1cd6e56 | 5057 | field = DECL_CHAIN (field); |
8d08fdba | 5058 | while (field && ! comptypes (lhstype, TREE_TYPE (field), 0)) |
e1cd6e56 | 5059 | field = DECL_CHAIN (field); |
8d08fdba MS |
5060 | if (field) |
5061 | { | |
5062 | if (complain) | |
5063 | error ("ambiguous overload for COMPONENT_REF requested"); | |
5064 | return error_mark_node; | |
5065 | } | |
5066 | } | |
5067 | else | |
5068 | { | |
5069 | if (complain) | |
5070 | error ("no appropriate overload exists for COMPONENT_REF"); | |
5071 | return error_mark_node; | |
5072 | } | |
2c73f9f5 | 5073 | #endif |
8d08fdba MS |
5074 | return rhs; |
5075 | } | |
5076 | ||
386b8a85 JM |
5077 | case TEMPLATE_ID_EXPR: |
5078 | { | |
5079 | explicit_targs = TREE_OPERAND (rhs, 1); | |
5080 | rhs = TREE_OPERAND (rhs, 0); | |
5081 | } | |
2c73f9f5 ML |
5082 | /* fall through */ |
5083 | my_friendly_assert (TREE_CODE (rhs) == OVERLOAD, 980401); | |
386b8a85 | 5084 | |
2c73f9f5 | 5085 | case OVERLOAD: |
8d08fdba | 5086 | { |
2c73f9f5 | 5087 | tree elem, elems; |
8d08fdba | 5088 | |
2c73f9f5 ML |
5089 | /* First look for an exact match. Search overloaded |
5090 | functions. May have to undo what `default_conversion' | |
5091 | might do to lhstype. */ | |
8d08fdba | 5092 | |
2c73f9f5 ML |
5093 | lhstype = validate_lhs (lhstype, complain); |
5094 | if (lhstype == error_mark_node) | |
5095 | return lhstype; | |
28cbf42c | 5096 | |
2c73f9f5 | 5097 | if (TREE_CODE (lhstype) != FUNCTION_TYPE) |
8d08fdba | 5098 | { |
2c73f9f5 | 5099 | rhs = DECL_NAME (OVL_FUNCTION (rhs)); |
8d08fdba | 5100 | if (complain) |
2c73f9f5 ML |
5101 | cp_error("cannot resolve overloaded function `%D' " |
5102 | "based on non-function type", rhs); | |
8d08fdba MS |
5103 | return error_mark_node; |
5104 | } | |
2c73f9f5 ML |
5105 | |
5106 | elems = rhs; | |
5107 | /* If there are explicit_targs, only a template function | |
5108 | can match. */ | |
5109 | if (explicit_targs == NULL_TREE) | |
5110 | while (elems) | |
5111 | { | |
5112 | elem = OVL_FUNCTION (elems); | |
5113 | if (! comptypes (lhstype, TREE_TYPE (elem), 1)) | |
5114 | elems = OVL_CHAIN (elems); | |
5115 | else | |
a703fb38 | 5116 | { |
2c73f9f5 ML |
5117 | mark_used (elem); |
5118 | return elem; | |
a703fb38 | 5119 | } |
2c73f9f5 | 5120 | } |
00595019 | 5121 | |
2c73f9f5 ML |
5122 | /* No exact match found, look for a compatible template. */ |
5123 | { | |
5124 | tree save_elem = 0; | |
5125 | elems = rhs; | |
5126 | if (TREE_CODE (elems) == TREE_LIST) | |
5127 | elems = TREE_VALUE (rhs); | |
5128 | for (; elems; elems = OVL_NEXT (elems)) | |
5129 | if (TREE_CODE (elem = OVL_CURRENT (elems)) == TEMPLATE_DECL) | |
5130 | { | |
5131 | int n = DECL_NTPARMS (elem); | |
5132 | tree t = make_scratch_vec (n); | |
5133 | int i; | |
5134 | i = type_unification | |
5135 | (DECL_INNERMOST_TEMPLATE_PARMS (elem), t, | |
5136 | TYPE_ARG_TYPES (TREE_TYPE (elem)), | |
5137 | TYPE_ARG_TYPES (lhstype), explicit_targs, 1, 1); | |
5138 | if (i == 0) | |
00595019 | 5139 | { |
2c73f9f5 | 5140 | if (save_elem) |
00595019 | 5141 | { |
2c73f9f5 ML |
5142 | cp_error ("ambiguous template instantiation converting to `%#T'", lhstype); |
5143 | return error_mark_node; | |
00595019 | 5144 | } |
2c73f9f5 ML |
5145 | save_elem = instantiate_template (elem, t); |
5146 | /* Check the return type. */ | |
5147 | if (! comptypes (TREE_TYPE (lhstype), | |
5148 | TREE_TYPE (TREE_TYPE (save_elem)), 1)) | |
5149 | save_elem = 0; | |
00595019 | 5150 | } |
2c73f9f5 ML |
5151 | } |
5152 | if (save_elem) | |
5153 | { | |
5154 | mark_used (save_elem); | |
5155 | return save_elem; | |
00595019 | 5156 | } |
2c73f9f5 | 5157 | } |
00595019 | 5158 | |
2c73f9f5 ML |
5159 | /* If there are explicit_targs, only a template function |
5160 | can match. */ | |
5161 | if (explicit_targs == NULL_TREE) | |
5162 | { | |
5163 | /* No match found, look for a compatible function. */ | |
5164 | tree elems = rhs; | |
5165 | elems = rhs; | |
5166 | for (; elems; elems = OVL_NEXT (elems)) | |
8d08fdba | 5167 | { |
2c73f9f5 ML |
5168 | elem = OVL_CURRENT (elems); |
5169 | if (comp_target_types (lhstype, TREE_TYPE (elem), 1) > 0) | |
5170 | break; | |
5171 | } | |
5172 | if (elems) | |
5173 | { | |
5174 | tree save_elem = elem; | |
5175 | for (elems = OVL_CHAIN (elems); elems; | |
5176 | elems = OVL_CHAIN (elems)) | |
8d08fdba | 5177 | { |
2c73f9f5 ML |
5178 | elem = OVL_FUNCTION (elems); |
5179 | if (comp_target_types (lhstype, TREE_TYPE (elem), 0) > 0) | |
5180 | break; | |
5181 | } | |
5182 | if (elems) | |
5183 | { | |
5184 | if (complain) | |
8d08fdba | 5185 | { |
2c73f9f5 ML |
5186 | cp_error |
5187 | ("cannot resolve overload to target type `%#T'", | |
5188 | lhstype); | |
5189 | cp_error_at (" ambiguity between `%#D'", save_elem); | |
5190 | cp_error_at (" and `%#D', at least", elem); | |
8d08fdba | 5191 | } |
2c73f9f5 | 5192 | return error_mark_node; |
8d08fdba | 5193 | } |
2c73f9f5 ML |
5194 | mark_used (save_elem); |
5195 | return save_elem; | |
8d08fdba | 5196 | } |
8d08fdba | 5197 | } |
2c73f9f5 ML |
5198 | if (complain) |
5199 | { | |
5200 | cp_error ("cannot resolve overload to target type `%#T'", lhstype); | |
5201 | cp_error | |
5202 | (" because no suitable overload of function `%D' exists", | |
5203 | DECL_NAME (OVL_FUNCTION (rhs))); | |
5204 | } | |
5205 | return error_mark_node; | |
5206 | } | |
5207 | ||
5208 | case TREE_LIST: | |
5209 | { | |
5210 | tree elem, baselink, name = NULL_TREE; | |
5211 | ||
5212 | if (TREE_PURPOSE (rhs) == error_mark_node) | |
5213 | { | |
5214 | /* Make sure we don't drop the non-local flag, as the old code | |
5215 | would rely on it. */ | |
5216 | int nl = TREE_NONLOCAL_FLAG (rhs); | |
5217 | /* We don't need the type of this node. */ | |
5218 | rhs = TREE_VALUE (rhs); | |
5219 | my_friendly_assert (TREE_NONLOCAL_FLAG (rhs) == nl, 980331); | |
5220 | } | |
5221 | /* Now we should have a baselink. */ | |
5222 | my_friendly_assert (TREE_CODE (TREE_PURPOSE (rhs)) == TREE_VEC, 980331); | |
5223 | /* First look for an exact match. Search member functions. | |
5224 | May have to undo what `default_conversion' might do to | |
5225 | lhstype. */ | |
5226 | ||
5227 | lhstype = validate_lhs (lhstype, complain); | |
5228 | if (lhstype == error_mark_node) | |
5229 | return lhstype; | |
8d08fdba MS |
5230 | |
5231 | if (TREE_NONLOCAL_FLAG (rhs)) | |
5232 | { | |
2c73f9f5 | 5233 | my_friendly_abort (980401); |
8d08fdba MS |
5234 | /* Got to get it as a baselink. */ |
5235 | rhs = lookup_fnfields (TYPE_BINFO (current_class_type), | |
2c73f9f5 | 5236 | DECL_NAME (OVL_FUNCTION (rhs)), 0); |
8d08fdba MS |
5237 | } |
5238 | else | |
5239 | { | |
5240 | my_friendly_assert (TREE_CHAIN (rhs) == NULL_TREE, 181); | |
2c73f9f5 ML |
5241 | my_friendly_assert (TREE_CODE (TREE_VALUE (rhs)) == FUNCTION_DECL |
5242 | || TREE_CODE (TREE_VALUE (rhs)) == OVERLOAD, | |
8d08fdba MS |
5243 | 182); |
5244 | } | |
5245 | ||
5246 | for (baselink = rhs; baselink; | |
5247 | baselink = next_baselink (baselink)) | |
5248 | { | |
5249 | elem = TREE_VALUE (baselink); | |
5250 | while (elem) | |
2c73f9f5 | 5251 | if (comptypes (lhstype, TREE_TYPE (OVL_CURRENT (elem)), 1)) |
72b7eeff | 5252 | { |
2c73f9f5 ML |
5253 | mark_used (OVL_CURRENT (elem)); |
5254 | return OVL_CURRENT (elem); | |
72b7eeff | 5255 | } |
9a0e77ba | 5256 | else |
2c73f9f5 | 5257 | elem = OVL_NEXT (elem); |
8d08fdba MS |
5258 | } |
5259 | ||
5260 | /* No exact match found, look for a compatible method. */ | |
5261 | for (baselink = rhs; baselink; | |
5262 | baselink = next_baselink (baselink)) | |
5263 | { | |
5264 | elem = TREE_VALUE (baselink); | |
2c73f9f5 ML |
5265 | for (; elem; elem = OVL_NEXT (elem)) |
5266 | if (comp_target_types (lhstype, | |
5267 | TREE_TYPE (OVL_CURRENT (elem)), 1) > 0) | |
5268 | break; | |
8d08fdba MS |
5269 | if (elem) |
5270 | { | |
2c73f9f5 ML |
5271 | tree save_elem = OVL_CURRENT (elem); |
5272 | for (elem = OVL_NEXT (elem); elem; elem = OVL_NEXT (elem)) | |
5273 | if (comp_target_types (lhstype, | |
5274 | TREE_TYPE (OVL_CURRENT (elem)), 0) > 0) | |
5275 | break; | |
8d08fdba MS |
5276 | if (elem) |
5277 | { | |
5278 | if (complain) | |
5279 | error ("ambiguous overload for overloaded method requested"); | |
5280 | return error_mark_node; | |
5281 | } | |
72b7eeff | 5282 | mark_used (save_elem); |
8d08fdba MS |
5283 | return save_elem; |
5284 | } | |
2c73f9f5 ML |
5285 | name = rhs; |
5286 | while (TREE_CODE (name) == TREE_LIST) | |
5287 | name = TREE_VALUE (name); | |
5288 | name = DECL_NAME (OVL_CURRENT (name)); | |
700f8a87 | 5289 | #if 0 |
8d08fdba MS |
5290 | if (TREE_CODE (lhstype) == FUNCTION_TYPE && globals < 0) |
5291 | { | |
5292 | /* Try to instantiate from non-member functions. */ | |
700f8a87 | 5293 | rhs = lookup_name_nonclass (name); |
8d08fdba MS |
5294 | if (rhs && TREE_CODE (rhs) == TREE_LIST) |
5295 | { | |
5296 | /* This code seems to be missing a `return'. */ | |
5297 | my_friendly_abort (4); | |
5298 | instantiate_type (lhstype, rhs, complain); | |
5299 | } | |
5300 | } | |
700f8a87 | 5301 | #endif |
8d08fdba MS |
5302 | } |
5303 | if (complain) | |
28cbf42c | 5304 | cp_error ("no compatible member functions named `%D'", name); |
8d08fdba MS |
5305 | return error_mark_node; |
5306 | } | |
5307 | ||
5308 | case CALL_EXPR: | |
5309 | /* This is too hard for now. */ | |
5310 | my_friendly_abort (183); | |
5311 | return error_mark_node; | |
5312 | ||
5313 | case PLUS_EXPR: | |
5314 | case MINUS_EXPR: | |
5315 | case COMPOUND_EXPR: | |
a0a33927 MS |
5316 | TREE_OPERAND (rhs, 0) |
5317 | = instantiate_type (lhstype, TREE_OPERAND (rhs, 0), complain); | |
8d08fdba MS |
5318 | if (TREE_OPERAND (rhs, 0) == error_mark_node) |
5319 | return error_mark_node; | |
a0a33927 MS |
5320 | TREE_OPERAND (rhs, 1) |
5321 | = instantiate_type (lhstype, TREE_OPERAND (rhs, 1), complain); | |
8d08fdba MS |
5322 | if (TREE_OPERAND (rhs, 1) == error_mark_node) |
5323 | return error_mark_node; | |
5324 | ||
5325 | TREE_TYPE (rhs) = lhstype; | |
5326 | return rhs; | |
5327 | ||
5328 | case MULT_EXPR: | |
5329 | case TRUNC_DIV_EXPR: | |
5330 | case FLOOR_DIV_EXPR: | |
5331 | case CEIL_DIV_EXPR: | |
5332 | case ROUND_DIV_EXPR: | |
5333 | case RDIV_EXPR: | |
5334 | case TRUNC_MOD_EXPR: | |
5335 | case FLOOR_MOD_EXPR: | |
5336 | case CEIL_MOD_EXPR: | |
5337 | case ROUND_MOD_EXPR: | |
5338 | case FIX_ROUND_EXPR: | |
5339 | case FIX_FLOOR_EXPR: | |
5340 | case FIX_CEIL_EXPR: | |
5341 | case FIX_TRUNC_EXPR: | |
5342 | case FLOAT_EXPR: | |
5343 | case NEGATE_EXPR: | |
5344 | case ABS_EXPR: | |
5345 | case MAX_EXPR: | |
5346 | case MIN_EXPR: | |
5347 | case FFS_EXPR: | |
5348 | ||
5349 | case BIT_AND_EXPR: | |
5350 | case BIT_IOR_EXPR: | |
5351 | case BIT_XOR_EXPR: | |
5352 | case LSHIFT_EXPR: | |
5353 | case RSHIFT_EXPR: | |
5354 | case LROTATE_EXPR: | |
5355 | case RROTATE_EXPR: | |
5356 | ||
5357 | case PREINCREMENT_EXPR: | |
5358 | case PREDECREMENT_EXPR: | |
5359 | case POSTINCREMENT_EXPR: | |
5360 | case POSTDECREMENT_EXPR: | |
5361 | if (complain) | |
db6f8fbe | 5362 | error ("invalid operation on uninstantiated type"); |
8d08fdba MS |
5363 | return error_mark_node; |
5364 | ||
5365 | case TRUTH_AND_EXPR: | |
5366 | case TRUTH_OR_EXPR: | |
5367 | case TRUTH_XOR_EXPR: | |
5368 | case LT_EXPR: | |
5369 | case LE_EXPR: | |
5370 | case GT_EXPR: | |
5371 | case GE_EXPR: | |
5372 | case EQ_EXPR: | |
5373 | case NE_EXPR: | |
5374 | case TRUTH_ANDIF_EXPR: | |
5375 | case TRUTH_ORIF_EXPR: | |
5376 | case TRUTH_NOT_EXPR: | |
5377 | if (complain) | |
5378 | error ("not enough type information"); | |
5379 | return error_mark_node; | |
5380 | ||
5381 | case COND_EXPR: | |
5382 | if (type_unknown_p (TREE_OPERAND (rhs, 0))) | |
5383 | { | |
5384 | if (complain) | |
5385 | error ("not enough type information"); | |
5386 | return error_mark_node; | |
5387 | } | |
a0a33927 MS |
5388 | TREE_OPERAND (rhs, 1) |
5389 | = instantiate_type (lhstype, TREE_OPERAND (rhs, 1), complain); | |
8d08fdba MS |
5390 | if (TREE_OPERAND (rhs, 1) == error_mark_node) |
5391 | return error_mark_node; | |
a0a33927 MS |
5392 | TREE_OPERAND (rhs, 2) |
5393 | = instantiate_type (lhstype, TREE_OPERAND (rhs, 2), complain); | |
8d08fdba MS |
5394 | if (TREE_OPERAND (rhs, 2) == error_mark_node) |
5395 | return error_mark_node; | |
5396 | ||
5397 | TREE_TYPE (rhs) = lhstype; | |
5398 | return rhs; | |
5399 | ||
5400 | case MODIFY_EXPR: | |
a0a33927 MS |
5401 | TREE_OPERAND (rhs, 1) |
5402 | = instantiate_type (lhstype, TREE_OPERAND (rhs, 1), complain); | |
8d08fdba MS |
5403 | if (TREE_OPERAND (rhs, 1) == error_mark_node) |
5404 | return error_mark_node; | |
5405 | ||
5406 | TREE_TYPE (rhs) = lhstype; | |
5407 | return rhs; | |
5408 | ||
5409 | case ADDR_EXPR: | |
700f8a87 MS |
5410 | if (TYPE_PTRMEMFUNC_P (lhstype)) |
5411 | lhstype = TYPE_PTRMEMFUNC_FN_TYPE (lhstype); | |
5412 | else if (TREE_CODE (lhstype) != POINTER_TYPE) | |
8d08fdba MS |
5413 | { |
5414 | if (complain) | |
5415 | error ("type for resolving address of overloaded function must be pointer type"); | |
5416 | return error_mark_node; | |
5417 | } | |
f376e137 | 5418 | { |
ec255269 | 5419 | tree fn = instantiate_type (TREE_TYPE (lhstype), TREE_OPERAND (rhs, 0), complain); |
f376e137 MS |
5420 | if (fn == error_mark_node) |
5421 | return error_mark_node; | |
5422 | mark_addressable (fn); | |
ec255269 | 5423 | TREE_TYPE (rhs) = lhstype; |
f376e137 MS |
5424 | TREE_OPERAND (rhs, 0) = fn; |
5425 | TREE_CONSTANT (rhs) = staticp (fn); | |
beb53fb8 JM |
5426 | if (TREE_CODE (lhstype) == POINTER_TYPE |
5427 | && TREE_CODE (TREE_TYPE (lhstype)) == METHOD_TYPE) | |
c73964b2 MS |
5428 | { |
5429 | build_ptrmemfunc_type (lhstype); | |
5430 | rhs = build_ptrmemfunc (lhstype, rhs, 0); | |
5431 | } | |
f376e137 | 5432 | } |
8d08fdba MS |
5433 | return rhs; |
5434 | ||
5435 | case ENTRY_VALUE_EXPR: | |
5436 | my_friendly_abort (184); | |
5437 | return error_mark_node; | |
5438 | ||
5439 | case ERROR_MARK: | |
5440 | return error_mark_node; | |
5441 | ||
5442 | default: | |
5443 | my_friendly_abort (185); | |
5444 | return error_mark_node; | |
5445 | } | |
5446 | } | |
5447 | \f | |
5448 | /* Return the name of the virtual function pointer field | |
5449 | (as an IDENTIFIER_NODE) for the given TYPE. Note that | |
5450 | this may have to look back through base types to find the | |
5451 | ultimate field name. (For single inheritance, these could | |
5452 | all be the same name. Who knows for multiple inheritance). */ | |
e92cc029 | 5453 | |
8d08fdba MS |
5454 | static tree |
5455 | get_vfield_name (type) | |
5456 | tree type; | |
5457 | { | |
5458 | tree binfo = TYPE_BINFO (type); | |
5459 | char *buf; | |
5460 | ||
5461 | while (BINFO_BASETYPES (binfo) | |
5462 | && TYPE_VIRTUAL_P (BINFO_TYPE (BINFO_BASETYPE (binfo, 0))) | |
5463 | && ! TREE_VIA_VIRTUAL (BINFO_BASETYPE (binfo, 0))) | |
5464 | binfo = BINFO_BASETYPE (binfo, 0); | |
5465 | ||
5466 | type = BINFO_TYPE (binfo); | |
2636fde4 JM |
5467 | buf = (char *) alloca (sizeof (VFIELD_NAME_FORMAT) |
5468 | + TYPE_NAME_LENGTH (type) + 2); | |
8d08fdba MS |
5469 | sprintf (buf, VFIELD_NAME_FORMAT, TYPE_NAME_STRING (type)); |
5470 | return get_identifier (buf); | |
5471 | } | |
5472 | ||
5473 | void | |
5474 | print_class_statistics () | |
5475 | { | |
5476 | #ifdef GATHER_STATISTICS | |
5477 | fprintf (stderr, "convert_harshness = %d\n", n_convert_harshness); | |
5478 | fprintf (stderr, "compute_conversion_costs = %d\n", n_compute_conversion_costs); | |
5479 | fprintf (stderr, "build_method_call = %d (inner = %d)\n", | |
5480 | n_build_method_call, n_inner_fields_searched); | |
5481 | if (n_vtables) | |
5482 | { | |
5483 | fprintf (stderr, "vtables = %d; vtable searches = %d\n", | |
5484 | n_vtables, n_vtable_searches); | |
5485 | fprintf (stderr, "vtable entries = %d; vtable elems = %d\n", | |
5486 | n_vtable_entries, n_vtable_elems); | |
5487 | } | |
5488 | #endif | |
5489 | } | |
5490 | ||
5491 | /* Push an obstack which is sufficiently long-lived to hold such class | |
5492 | decls that may be cached in the previous_class_values list. For now, let's | |
5493 | use the permanent obstack, later we may create a dedicated obstack just | |
5494 | for this purpose. The effect is undone by pop_obstacks. */ | |
c91a56d2 | 5495 | |
8d08fdba MS |
5496 | void |
5497 | maybe_push_cache_obstack () | |
5498 | { | |
5499 | push_obstacks_nochange (); | |
5500 | if (current_class_depth == 1) | |
5501 | current_obstack = &permanent_obstack; | |
5502 | } | |
c91a56d2 MS |
5503 | |
5504 | /* Build a dummy reference to ourselves so Derived::Base (and A::A) works, | |
5505 | according to [class]: | |
5506 | The class-name is also inserted | |
5507 | into the scope of the class itself. For purposes of access checking, | |
5508 | the inserted class name is treated as if it were a public member name. */ | |
5509 | ||
5510 | tree | |
5511 | build_self_reference () | |
5512 | { | |
5513 | tree name = constructor_name (current_class_type); | |
5514 | tree value = build_lang_decl (TYPE_DECL, name, current_class_type); | |
5515 | DECL_NONLOCAL (value) = 1; | |
5516 | DECL_CONTEXT (value) = current_class_type; | |
5517 | DECL_CLASS_CONTEXT (value) = current_class_type; | |
5518 | CLASSTYPE_LOCAL_TYPEDECLS (current_class_type) = 1; | |
5519 | DECL_ARTIFICIAL (value) = 1; | |
5520 | ||
5521 | pushdecl_class_level (value); | |
5522 | return value; | |
5523 | } | |
570221c2 JM |
5524 | |
5525 | /* Returns 1 if TYPE contains only padding bytes. */ | |
5526 | ||
5527 | int | |
5528 | is_empty_class (type) | |
5529 | tree type; | |
5530 | { | |
5531 | tree t; | |
5532 | ||
a59ca936 JM |
5533 | if (! IS_AGGR_TYPE (type)) |
5534 | return 0; | |
5535 | ||
5536 | if (flag_new_abi) | |
5537 | return CLASSTYPE_SIZE (type) == integer_zero_node; | |
5538 | ||
5539 | if (TYPE_BINFO_BASETYPES (type)) | |
570221c2 JM |
5540 | return 0; |
5541 | t = TYPE_FIELDS (type); | |
5542 | while (t && TREE_CODE (t) != FIELD_DECL) | |
5543 | t = TREE_CHAIN (t); | |
5544 | return (t == NULL_TREE); | |
5545 | } |