nsz Git - libfirm/blob - ir/tr/entity.c

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Representation of all program known entities.
  23  * @author  Martin Trapp, Christian Schaefer, Goetz Lindenmaier, Michael Beck
  24  * @version $Id$
  25  */
  26 #include "config.h"
  27
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <stddef.h>
  31
  32 #include "xmalloc.h"
  33 #include "entity_t.h"
  34 #include "array.h"
  35 #include "irtools.h"
  36 #include "irhooks.h"
  37 #include "irprintf.h"
  38
  39 #include "irprog_t.h"
  40 #include "ircons.h"
  41 #include "tv_t.h"
  42 #include "irdump.h"
  43 #include "irgraph_t.h"
  44 #include "callgraph.h"
  45 #include "error.h"
  46 #include "compound_path.h"
  47
  48 /*-----------------------------------------------------------------*/
  49 /** general                                                       **/
  50 /*-----------------------------------------------------------------*/
  51
  52 ir_entity *unknown_entity = NULL;
  53
  54 ir_entity *get_unknown_entity(void) { return unknown_entity; }
  55
  56 /** The name of the unknown entity. */
  57 #define UNKNOWN_ENTITY_NAME "unknown_entity"
  58
  59 /*-----------------------------------------------------------------*/
  60 /* ENTITY                                                          */
  61 /*-----------------------------------------------------------------*/
  62
  63 /**
  64  * Add an entity to it's already set owner type.
  65  */
  66 static inline void insert_entity_in_owner(ir_entity *ent)
  67 {
  68         ir_type *owner = ent->owner;
  69         switch (get_type_tpop_code(owner)) {
  70         case tpo_class:
  71                 add_class_member(owner, ent);
  72                 break;
  73         case tpo_struct:
  74                 add_struct_member(owner, ent);
  75                 break;
  76         case tpo_union:
  77                 add_union_member(owner, ent);
  78                 break;
  79         case tpo_array:
  80                 set_array_element_entity(owner, ent);
  81                 break;
  82         default:
  83                 panic("Unsupported type kind");
  84         }
  85 }  /* insert_entity_in_owner */
  86
  87 /**
  88  * Creates a new entity. This entity is NOT inserted in the owner type.
  89  *
  90  * @param db     debug info for this entity
  91  * @param owner  the owner type of the new entity
  92  * @param name   the name of the new entity
  93  * @param type   the type of the new entity
  94  *
  95  * @return the new created entity
  96  */
  97 static inline ir_entity *
  98 new_rd_entity(dbg_info *db, ir_type *owner, ident *name, ir_type *type)
  99 {
 100         ir_entity *res;
 101         ir_graph *rem;
 102
 103         assert(!id_contains_char(name, ' ') && "entity name should not contain spaces");
 104
 105         res = XMALLOCZ(ir_entity);
 106
 107         res->kind    = k_entity;
 108         res->name    = name;
 109         res->ld_name = NULL;
 110         res->type    = type;
 111         res->owner   = owner;
 112
 113         res->volatility           = volatility_non_volatile;
 114         res->aligned              = align_is_aligned;
 115         res->usage                = ir_usage_unknown;
 116         res->compiler_gen         = 0;
 117         res->visibility           = ir_visibility_default;
 118         res->offset               = -1;
 119         res->offset_bit_remainder = 0;
 120         res->alignment            = 0;
 121         res->link                 = NULL;
 122         res->repr_class           = NULL;
 123
 124         if (is_Method_type(type)) {
 125                 symconst_symbol sym;
 126                 ir_mode *mode = is_Method_type(type) ? mode_P_code : mode_P_data;
 127                 sym.entity_p            = res;
 128                 rem                     = current_ir_graph;
 129                 current_ir_graph        = get_const_code_irg();
 130                 set_atomic_ent_value(res, new_SymConst(mode, sym, symconst_addr_ent));
 131                 current_ir_graph        = rem;
 132                 res->linkage            = IR_LINKAGE_CONSTANT;
 133                 res->attr.mtd_attr.irg_add_properties = mtp_property_inherited;
 134                 res->attr.mtd_attr.vtable_number      = VTABLE_NUM_NOT_SET;
 135                 res->attr.mtd_attr.param_access       = NULL;
 136                 res->attr.mtd_attr.param_weight       = NULL;
 137                 res->attr.mtd_attr.irg                = NULL;
 138         } else if (is_compound_type(type)) {
 139                 res->attr.cmpd_attr.values    = NULL;
 140                 res->attr.cmpd_attr.val_paths = NULL;
 141         } else if (is_code_type(type)) {
 142                 res->attr.code_attr.label = (ir_label_t) -1;
 143         }
 144
 145         if (is_Class_type(owner)) {
 146                 res->overwrites    = NEW_ARR_F(ir_entity *, 0);
 147                 res->overwrittenby = NEW_ARR_F(ir_entity *, 0);
 148         } else {
 149                 res->overwrites    = NULL;
 150                 res->overwrittenby = NULL;
 151         }
 152
 153 #ifdef DEBUG_libfirm
 154         res->nr = get_irp_new_node_nr();
 155 #endif /* DEBUG_libfirm */
 156
 157         res->visit = 0;
 158         set_entity_dbg_info(res, db);
 159
 160         return res;
 161 }  /* new_rd_entity */
 162
 163 ir_entity *
 164 new_d_entity(ir_type *owner, ident *name, ir_type *type, dbg_info *db)
 165 {
 166         ir_entity *res;
 167
 168         assert(is_compound_type(owner));
 169         res = new_rd_entity(db, owner, name, type);
 170         /* Remember entity in it's owner. */
 171         insert_entity_in_owner(res);
 172
 173         hook_new_entity(res);
 174         return res;
 175 }  /* new_d_entity */
 176
 177 ir_entity *
 178 new_entity(ir_type *owner, ident *name, ir_type *type)
 179 {
 180         return new_d_entity(owner, name, type, NULL);
 181 }  /* new_entity */
 182
 183 /**
 184  * Free entity attributes.
 185  *
 186  * @param ent  the entity
 187  */
 188 static void free_entity_attrs(ir_entity *ent)
 189 {
 190         int i;
 191         if (get_type_tpop(get_entity_owner(ent)) == type_class) {
 192                 DEL_ARR_F(ent->overwrites);    ent->overwrites = NULL;
 193                 DEL_ARR_F(ent->overwrittenby); ent->overwrittenby = NULL;
 194         } else {
 195                 assert(ent->overwrites == NULL);
 196                 assert(ent->overwrittenby == NULL);
 197         }
 198         if (ent->initializer != NULL) {
 199                 /* TODO: free initializers */
 200         } else if (entity_has_compound_ent_values(ent)) {
 201                 if (ent->attr.cmpd_attr.val_paths) {
 202                         for (i = get_compound_ent_n_values(ent) - 1; i >= 0; --i)
 203                                 if (ent->attr.cmpd_attr.val_paths[i]) {
 204                                         /* free_compound_graph_path(ent->attr.cmpd_attr.val_paths[i]) ;  * @@@ warum nich? */
 205                                         /* Geht nich: wird mehrfach verwendet!!! ==> mehrfach frei gegeben. */
 206                                         /* DEL_ARR_F(ent->attr.cmpd_attr.val_paths); */
 207                                 }
 208                                 ent->attr.cmpd_attr.val_paths = NULL;
 209                 }
 210         }
 211         if (is_compound_entity(ent)) {
 212                 if (ent->attr.cmpd_attr.values) {
 213                         /*DEL_ARR_F(ent->attr.cmpd_attr.values)*/;
 214                 }
 215                 ent->attr.cmpd_attr.values = NULL;
 216         } else if (is_method_entity(ent)) {
 217                 if (ent->attr.mtd_attr.param_access) {
 218                         DEL_ARR_F(ent->attr.mtd_attr.param_access);
 219                         ent->attr.mtd_attr.param_access = NULL;
 220                 }
 221                 if (ent->attr.mtd_attr.param_weight) {
 222                         DEL_ARR_F(ent->attr.mtd_attr.param_weight);
 223                         ent->attr.mtd_attr.param_weight = NULL;
 224                 }
 225         }
 226 }  /* free_entity_attrs */
 227
 228 /**
 229  * Creates a deep copy of an entity.
 230  */
 231 static ir_entity *deep_entity_copy(ir_entity *old)
 232 {
 233         ir_entity *newe = XMALLOC(ir_entity);
 234
 235         *newe = *old;
 236         if (old->initializer != NULL) {
 237                 /* FIXME: the initializers are NOT copied */
 238         } else if (entity_has_compound_ent_values(old)) {
 239                 newe->attr.cmpd_attr.values    = NULL;
 240                 newe->attr.cmpd_attr.val_paths = NULL;
 241                 if (old->attr.cmpd_attr.values)
 242                         newe->attr.cmpd_attr.values = DUP_ARR_F(ir_node *, old->attr.cmpd_attr.values);
 243
 244                 /* FIXME: the compound graph paths are NOT copied */
 245                 if (old->attr.cmpd_attr.val_paths)
 246                         newe->attr.cmpd_attr.val_paths = DUP_ARR_F(compound_graph_path *, old->attr.cmpd_attr.val_paths);
 247         } else if (is_method_entity(old)) {
 248                 /* do NOT copy them, reanalyze. This might be the best solution */
 249                 newe->attr.mtd_attr.param_access = NULL;
 250                 newe->attr.mtd_attr.param_weight = NULL;
 251         }
 252
 253 #ifdef DEBUG_libfirm
 254         newe->nr = get_irp_new_node_nr();
 255 #endif
 256         return newe;
 257 }
 258 /*
 259  * Copies the entity if the new_owner is different from the
 260  * owner of the old entity,  else returns the old entity.
 261  */
 262 ir_entity *
 263 copy_entity_own(ir_entity *old, ir_type *new_owner)
 264 {
 265         ir_entity *newe;
 266         assert(is_entity(old));
 267         assert(is_compound_type(new_owner));
 268         assert(get_type_state(new_owner) != layout_fixed);
 269
 270         if (old->owner == new_owner)
 271                 return old;
 272
 273         /* create a deep copy so we are safe of aliasing and double-freeing. */
 274         newe = deep_entity_copy(old);
 275         newe->owner = new_owner;
 276
 277         if (is_Class_type(new_owner)) {
 278                 newe->overwrites    = NEW_ARR_F(ir_entity *, 0);
 279                 newe->overwrittenby = NEW_ARR_F(ir_entity *, 0);
 280         }
 281
 282         insert_entity_in_owner(newe);
 283         return newe;
 284 }  /* copy_entity_own */
 285
 286 ir_entity *
 287 copy_entity_name(ir_entity *old, ident *new_name)
 288 {
 289         ir_entity *newe;
 290         assert(old && old->kind == k_entity);
 291
 292         if (old->name == new_name) return old;
 293         newe = deep_entity_copy(old);
 294         newe->name = new_name;
 295         newe->ld_name = NULL;
 296
 297         if (is_Class_type(newe->owner)) {
 298                 newe->overwrites    = DUP_ARR_F(ir_entity *, old->overwrites);
 299                 newe->overwrittenby = DUP_ARR_F(ir_entity *, old->overwrittenby);
 300         }
 301         insert_entity_in_owner(newe);
 302
 303         return newe;
 304 }  /* copy_entity_name */
 305
 306 void
 307 free_entity(ir_entity *ent)
 308 {
 309         assert(ent && ent->kind == k_entity);
 310         free_entity_attrs(ent);
 311         ent->kind = k_BAD;
 312         free(ent);
 313 }  /* free_entity */
 314
 315 /* Outputs a unique number for this node */
 316 long
 317 get_entity_nr(const ir_entity *ent)
 318 {
 319         assert(ent && ent->kind == k_entity);
 320 #ifdef DEBUG_libfirm
 321         return ent->nr;
 322 #else
 323         return (long)PTR_TO_INT(ent);
 324 #endif
 325 }  /* get_entity_nr */
 326
 327 const char *
 328 (get_entity_name)(const ir_entity *ent) {
 329         return _get_entity_name(ent);
 330 }
 331
 332 ident *
 333 (get_entity_ident)(const ir_entity *ent) {
 334         return _get_entity_ident(ent);
 335 }
 336
 337 void
 338 (set_entity_ident)(ir_entity *ent, ident *id) {
 339         _set_entity_ident(ent, id);
 340 }
 341
 342 ir_type *
 343 (get_entity_owner)(const ir_entity *ent) {
 344         return _get_entity_owner(ent);
 345 }
 346
 347 void
 348 set_entity_owner(ir_entity *ent, ir_type *owner)
 349 {
 350         assert(is_entity(ent));
 351         assert(is_compound_type(owner));
 352         ent->owner = owner;
 353 }
 354
 355 ident *(get_entity_ld_ident)(const ir_entity *ent)
 356 {
 357         return _get_entity_ld_ident(ent);
 358 }
 359
 360 void
 361 (set_entity_ld_ident)(ir_entity *ent, ident *ld_ident) {
 362         _set_entity_ld_ident(ent, ld_ident);
 363 }
 364
 365 const char *(get_entity_ld_name)(const ir_entity *ent)
 366 {
 367         return _get_entity_ld_name(ent);
 368 }
 369
 370 ir_type *
 371 (get_entity_type)(const ir_entity *ent) {
 372         return _get_entity_type(ent);
 373 }
 374
 375 void
 376 (set_entity_type)(ir_entity *ent, ir_type *type) {
 377         _set_entity_type(ent, type);
 378 }
 379
 380 ir_volatility
 381 (get_entity_volatility)(const ir_entity *ent) {
 382         return _get_entity_volatility(ent);
 383 }
 384
 385 void
 386 (set_entity_volatility)(ir_entity *ent, ir_volatility vol) {
 387         _set_entity_volatility(ent, vol);
 388 }
 389
 390 /* Return the name of the volatility. */
 391 const char *get_volatility_name(ir_volatility var)
 392 {
 393 #define X(a)    case a: return #a
 394         switch (var) {
 395         X(volatility_non_volatile);
 396         X(volatility_is_volatile);
 397     default: return "BAD VALUE";
 398         }
 399 #undef X
 400 }  /* get_volatility_name */
 401
 402 ir_align
 403 (get_entity_aligned)(const ir_entity *ent) {
 404         return _get_entity_aligned(ent);
 405 }
 406
 407 void
 408 (set_entity_aligned)(ir_entity *ent, ir_align a) {
 409         _set_entity_aligned(ent, a);
 410 }
 411
 412 unsigned
 413 (get_entity_alignment)(const ir_entity *ent) {
 414         return _get_entity_alignment(ent);
 415 }
 416
 417 void
 418 (set_entity_alignment)(ir_entity *ent, unsigned alignment) {
 419         _set_entity_alignment(ent, alignment);
 420 }
 421
 422 /* Return the name of the alignment. */
 423 const char *get_align_name(ir_align a)
 424 {
 425 #define X(a)    case a: return #a
 426         switch (a) {
 427         X(align_non_aligned);
 428         X(align_is_aligned);
 429         default: return "BAD VALUE";
 430         }
 431 #undef X
 432 }  /* get_align_name */
 433
 434 void
 435 set_entity_label(ir_entity *ent, ir_label_t label)
 436 {
 437         ent->attr.code_attr.label = label;
 438 }
 439
 440 ir_label_t get_entity_label(const ir_entity *ent)
 441 {
 442         return ent->attr.code_attr.label;
 443 }
 444
 445 static void verify_visibility(const ir_entity *entity)
 446 {
 447         if (get_entity_visibility(entity) == ir_visibility_external
 448                         && !is_method_entity(entity)) {
 449                 assert(!entity_has_definition(entity));
 450         }
 451 }
 452
 453 void set_entity_visibility(ir_entity *entity, ir_visibility visibility)
 454 {
 455         entity->visibility = visibility;
 456         verify_visibility(entity);
 457 }
 458
 459 ir_visibility get_entity_visibility(const ir_entity *entity)
 460 {
 461         return entity->visibility;
 462 }
 463
 464 void set_entity_linkage(ir_entity *entity, ir_linkage linkage)
 465 {
 466         entity->linkage = linkage;
 467 }
 468
 469 ir_linkage (get_entity_linkage)(const ir_entity *entity)
 470 {
 471         return get_entity_linkage(entity);
 472 }
 473
 474 void add_entity_linkage(ir_entity *entity, ir_linkage linkage)
 475 {
 476         entity->linkage |= linkage;
 477 }
 478
 479 void remove_entity_linkage(ir_entity *entity, ir_linkage linkage)
 480 {
 481         entity->linkage &= ~linkage;
 482 }
 483
 484 /* Checks if an entity is compiler generated */
 485 int (is_entity_compiler_generated)(const ir_entity *ent)
 486 {
 487         return _is_entity_compiler_generated(ent);
 488 }  /* is_entity_compiler_generated */
 489
 490 /* Sets/resets the compiler generated flag */
 491 void (set_entity_compiler_generated)(ir_entity *ent, int flag)
 492 {
 493         _set_entity_compiler_generated(ent, flag);
 494 }  /* set_entity_compiler_generated */
 495
 496 ir_entity_usage (get_entity_usage)(const ir_entity *ent)
 497 {
 498         return _get_entity_usage(ent);
 499 }
 500
 501 void (set_entity_usage)(ir_entity *ent, ir_entity_usage flags)
 502 {
 503         _set_entity_usage(ent, flags);
 504 }
 505
 506 /* Set has no effect for existent entities of type method. */
 507 ir_node *get_atomic_ent_value(ir_entity *entity)
 508 {
 509         ir_initializer_t *initializer = get_entity_initializer(entity);
 510
 511         assert(entity && is_atomic_entity(entity));
 512         if (initializer == NULL) {
 513                 ir_type *type = get_entity_type(entity);
 514                 return new_r_Unknown(get_const_code_irg(), get_type_mode(type));
 515         }
 516
 517         switch (get_initializer_kind(initializer)) {
 518         case IR_INITIALIZER_NULL: {
 519                 ir_type *type = get_entity_type(entity);
 520                 ir_mode *mode = get_type_mode(type);
 521                 return new_r_Const(get_const_code_irg(), get_mode_null(mode));
 522         }
 523         case IR_INITIALIZER_TARVAL: {
 524                 tarval *tv = get_initializer_tarval_value(initializer);
 525                 return new_r_Const(get_const_code_irg(), tv);
 526         }
 527         case IR_INITIALIZER_CONST:
 528                 return get_initializer_const_value(initializer);
 529         case IR_INITIALIZER_COMPOUND:
 530                 panic("compound initializer in atomic entity not allowed (%+F)", entity);
 531         }
 532
 533         panic("invalid initializer kind in get_atomic_ent_value(%+F)", entity);
 534 }
 535
 536 void set_atomic_ent_value(ir_entity *entity, ir_node *val)
 537 {
 538         ir_initializer_t *initializer;
 539
 540         assert(is_atomic_entity(entity));
 541         assert(get_entity_peculiarity(entity) != peculiarity_description);
 542
 543         assert(is_Dummy(val) || get_irn_mode(val) == get_type_mode(entity->type));
 544         initializer = create_initializer_const(val);
 545         entity->initializer = initializer;
 546 }
 547
 548 /* Returns true if the the node is representable as code on
 549  *  const_code_irg. */
 550 int is_irn_const_expression(ir_node *n)
 551 {
 552         ir_mode *m;
 553
 554         /* we are in danger iff an exception will arise. TODO: be more precisely,
 555          * for instance Div. will NOT rise if divisor != 0
 556          */
 557         if (is_binop(n) && !is_fragile_op(n))
 558                 return is_irn_const_expression(get_binop_left(n)) && is_irn_const_expression(get_binop_right(n));
 559
 560         m = get_irn_mode(n);
 561         switch (get_irn_opcode(n)) {
 562         case iro_Const:
 563         case iro_SymConst:
 564         case iro_Unknown:
 565                 return 1;
 566         case iro_Conv:
 567         case iro_Cast:
 568                 return is_irn_const_expression(get_irn_n(n, 0));
 569         default:
 570                 break;
 571         }
 572         return 0;
 573 }  /* is_irn_const_expression */
 574
 575 /*
 576  * Copies a firm subgraph that complies to the restrictions for
 577  * constant expressions to current_block in current_ir_graph.
 578  */
 579 ir_node *copy_const_value(dbg_info *dbg, ir_node *n)
 580 {
 581         ir_node *nn;
 582         ir_mode *m;
 583
 584         /* @@@ GL I think  we should implement this using the routines from irgopt for
 585                dead node elimination/inlineing. */
 586
 587         m = get_irn_mode(n);
 588         switch (get_irn_opcode(n)) {
 589         case iro_Const:
 590                 nn = new_d_Const_type(dbg, get_Const_tarval(n), get_Const_type(n));
 591                 break;
 592         case iro_SymConst:
 593                 nn = new_d_SymConst_type(dbg, get_irn_mode(n), get_SymConst_symbol(n), get_SymConst_kind(n),
 594                         get_SymConst_value_type(n));
 595                 break;
 596         case iro_Add:
 597                 nn = new_d_Add(dbg, copy_const_value(dbg, get_Add_left(n)),
 598                         copy_const_value(dbg, get_Add_right(n)), m); break;
 599         case iro_Sub:
 600                 nn = new_d_Sub(dbg, copy_const_value(dbg, get_Sub_left(n)),
 601                         copy_const_value(dbg, get_Sub_right(n)), m); break;
 602         case iro_Mul:
 603                 nn = new_d_Mul(dbg, copy_const_value(dbg, get_Mul_left(n)),
 604                         copy_const_value(dbg, get_Mul_right(n)), m); break;
 605         case iro_And:
 606                 nn = new_d_And(dbg, copy_const_value(dbg, get_And_left(n)),
 607                         copy_const_value(dbg, get_And_right(n)), m); break;
 608         case iro_Or:
 609                 nn = new_d_Or(dbg, copy_const_value(dbg, get_Or_left(n)),
 610                         copy_const_value(dbg, get_Or_right(n)), m); break;
 611         case iro_Eor:
 612                 nn = new_d_Eor(dbg, copy_const_value(dbg, get_Eor_left(n)),
 613                         copy_const_value(dbg, get_Eor_right(n)), m); break;
 614         case iro_Cast:
 615                 nn = new_d_Cast(dbg, copy_const_value(dbg, get_Cast_op(n)), get_Cast_type(n)); break;
 616         case iro_Conv:
 617                 nn = new_d_Conv(dbg, copy_const_value(dbg, get_Conv_op(n)), m); break;
 618         case iro_Unknown:
 619                 nn = new_Unknown(m); break;
 620         default:
 621                 assert(0 && "opcode invalid or not implemented");
 622                 nn = NULL;
 623                 break;
 624         }
 625         return nn;
 626 }  /* copy_const_value */
 627
 628 /** Return the name of the initializer kind. */
 629 const char *get_initializer_kind_name(ir_initializer_kind_t ini)
 630 {
 631 #define X(a)    case a: return #a
 632         switch (ini) {
 633         X(IR_INITIALIZER_CONST);
 634         X(IR_INITIALIZER_TARVAL);
 635         X(IR_INITIALIZER_NULL);
 636         X(IR_INITIALIZER_COMPOUND);
 637     default: return "BAD VALUE";
 638         }
 639 #undef X
 640 }
 641
 642 static ir_initializer_t null_initializer = { IR_INITIALIZER_NULL };
 643
 644 ir_initializer_t *get_initializer_null(void)
 645 {
 646         return &null_initializer;
 647 }
 648
 649 ir_initializer_t *create_initializer_const(ir_node *value)
 650 {
 651         struct obstack *obst = get_irg_obstack(get_const_code_irg());
 652
 653         ir_initializer_t *initializer
 654                 = obstack_alloc(obst, sizeof(ir_initializer_const_t));
 655         initializer->kind         = IR_INITIALIZER_CONST;
 656         initializer->consti.value = value;
 657
 658         return initializer;
 659 }
 660
 661 ir_initializer_t *create_initializer_tarval(tarval *tv)
 662 {
 663         struct obstack *obst = get_irg_obstack(get_const_code_irg());
 664
 665         ir_initializer_t *initializer
 666                 = obstack_alloc(obst, sizeof(ir_initializer_tarval_t));
 667         initializer->kind         = IR_INITIALIZER_TARVAL;
 668         initializer->tarval.value = tv;
 669
 670         return initializer;
 671 }
 672
 673 ir_initializer_t *create_initializer_compound(unsigned n_entries)
 674 {
 675         struct obstack *obst = get_irg_obstack(get_const_code_irg());
 676
 677         size_t i;
 678         size_t size  = sizeof(ir_initializer_compound_t)
 679                      + (n_entries-1) * sizeof(ir_initializer_t*);
 680
 681         ir_initializer_t *initializer = obstack_alloc(obst, size);
 682         initializer->kind                    = IR_INITIALIZER_COMPOUND;
 683         initializer->compound.n_initializers = n_entries;
 684
 685         for(i = 0; i < n_entries; ++i) {
 686                 initializer->compound.initializers[i] = get_initializer_null();
 687         }
 688
 689         return initializer;
 690 }
 691
 692 ir_node *get_initializer_const_value(const ir_initializer_t *initializer)
 693 {
 694         assert(initializer->kind == IR_INITIALIZER_CONST);
 695         return skip_Id(initializer->consti.value);
 696 }
 697
 698 tarval *get_initializer_tarval_value(const ir_initializer_t *initializer)
 699 {
 700         assert(initializer->kind == IR_INITIALIZER_TARVAL);
 701         return initializer->tarval.value;
 702 }
 703
 704 unsigned get_initializer_compound_n_entries(const ir_initializer_t *initializer)
 705 {
 706         assert(initializer->kind == IR_INITIALIZER_COMPOUND);
 707         return initializer->compound.n_initializers;
 708 }
 709
 710 void set_initializer_compound_value(ir_initializer_t *initializer,
 711                                     unsigned index, ir_initializer_t *value)
 712 {
 713         assert(initializer->kind == IR_INITIALIZER_COMPOUND);
 714         assert(index < initializer->compound.n_initializers);
 715
 716         initializer->compound.initializers[index] = value;
 717 }
 718
 719 ir_initializer_t *get_initializer_compound_value(
 720                 const ir_initializer_t *initializer, unsigned index)
 721 {
 722         assert(initializer->kind == IR_INITIALIZER_COMPOUND);
 723         assert(index < initializer->compound.n_initializers);
 724
 725         return initializer->compound.initializers[index];
 726 }
 727
 728 ir_initializer_kind_t get_initializer_kind(const ir_initializer_t *initializer)
 729 {
 730         return initializer->kind;
 731 }
 732
 733 static void check_entity_initializer(ir_entity *entity)
 734 {
 735 #ifndef NDEBUG
 736         ir_initializer_t *initializer = entity->initializer;
 737         switch (initializer->kind) {
 738         case IR_INITIALIZER_COMPOUND:
 739                 assert(is_compound_entity(entity));
 740                 break;
 741         case IR_INITIALIZER_CONST:
 742         case IR_INITIALIZER_TARVAL:
 743                 assert(is_atomic_entity(entity));
 744                 break;
 745         case IR_INITIALIZER_NULL:
 746                 break;
 747         }
 748 #endif
 749 }
 750
 751 void set_entity_initializer(ir_entity *entity, ir_initializer_t *initializer)
 752 {
 753         entity->initializer = initializer;
 754         check_entity_initializer(entity);
 755 }
 756
 757 int has_entity_initializer(const ir_entity *entity)
 758 {
 759         return entity->initializer != NULL;
 760 }
 761
 762 ir_initializer_t *get_entity_initializer(const ir_entity *entity)
 763 {
 764         return entity->initializer;
 765 }
 766
 767 int (get_entity_offset)(const ir_entity *ent)
 768 {
 769         return _get_entity_offset(ent);
 770 }
 771
 772 void (set_entity_offset)(ir_entity *ent, int offset)
 773 {
 774         _set_entity_offset(ent, offset);
 775 }
 776
 777 unsigned char (get_entity_offset_bits_remainder)(const ir_entity *ent)
 778 {
 779         return _get_entity_offset_bits_remainder(ent);
 780 }
 781
 782 void (set_entity_offset_bits_remainder)(ir_entity *ent, unsigned char offset)
 783 {
 784         _set_entity_offset_bits_remainder(ent, offset);
 785 }
 786
 787 void add_entity_overwrites(ir_entity *ent, ir_entity *overwritten)
 788 {
 789 #ifndef NDEBUG
 790         ir_type *owner     = get_entity_owner(ent);
 791         ir_type *ovw_ovner = get_entity_owner(overwritten);
 792         assert(is_Class_type(owner));
 793         assert(is_Class_type(ovw_ovner));
 794         assert(! is_class_final(ovw_ovner));
 795 #endif /* NDEBUG */
 796         ARR_APP1(ir_entity *, ent->overwrites, overwritten);
 797         ARR_APP1(ir_entity *, overwritten->overwrittenby, ent);
 798 }
 799
 800 int get_entity_n_overwrites(const ir_entity *ent)
 801 {
 802         assert(is_Class_type(get_entity_owner(ent)));
 803         return (ARR_LEN(ent->overwrites));
 804 }
 805
 806 int get_entity_overwrites_index(const ir_entity *ent, ir_entity *overwritten)
 807 {
 808         int i, n;
 809         assert(is_Class_type(get_entity_owner(ent)));
 810         n = get_entity_n_overwrites(ent);
 811         for (i = 0; i < n; ++i) {
 812                 if (get_entity_overwrites(ent, i) == overwritten)
 813                         return i;
 814         }
 815         return -1;
 816 }
 817
 818 ir_entity *get_entity_overwrites(const ir_entity *ent, int pos)
 819 {
 820         assert(is_Class_type(get_entity_owner(ent)));
 821         assert(pos < get_entity_n_overwrites(ent));
 822         return ent->overwrites[pos];
 823 }
 824
 825 void set_entity_overwrites(ir_entity *ent, int pos, ir_entity *overwritten)
 826 {
 827         assert(is_Class_type(get_entity_owner(ent)));
 828         assert(pos < get_entity_n_overwrites(ent));
 829         ent->overwrites[pos] = overwritten;
 830 }
 831
 832 void remove_entity_overwrites(ir_entity *ent, ir_entity *overwritten)
 833 {
 834         int i, n;
 835         assert(is_Class_type(get_entity_owner(ent)));
 836         n = ARR_LEN(ent->overwrites);
 837         for (i = 0; i < n; ++i) {
 838                 if (ent->overwrites[i] == overwritten) {
 839                         for (; i < n - 1; i++)
 840                                 ent->overwrites[i] = ent->overwrites[i+1];
 841                         ARR_SETLEN(ir_entity*, ent->overwrites, n - 1);
 842                         break;
 843                 }
 844         }
 845 }
 846
 847 void add_entity_overwrittenby(ir_entity *ent, ir_entity *overwrites)
 848 {
 849         add_entity_overwrites(overwrites, ent);
 850 }
 851
 852 int get_entity_n_overwrittenby(const ir_entity *ent)
 853 {
 854         assert(is_Class_type(get_entity_owner(ent)));
 855         return ARR_LEN(ent->overwrittenby);
 856 }
 857
 858 int get_entity_overwrittenby_index(const ir_entity *ent, ir_entity *overwrites)
 859 {
 860         int i, n;
 861         assert(is_Class_type(get_entity_owner(ent)));
 862         n = get_entity_n_overwrittenby(ent);
 863         for (i = 0; i < n; ++i) {
 864                 if (get_entity_overwrittenby(ent, i) == overwrites)
 865                         return i;
 866         }
 867         return -1;
 868 }
 869
 870 ir_entity *get_entity_overwrittenby(const ir_entity *ent, int pos)
 871 {
 872         assert(is_Class_type(get_entity_owner(ent)));
 873         assert(pos < get_entity_n_overwrittenby(ent));
 874         return ent->overwrittenby[pos];
 875 }
 876
 877 void set_entity_overwrittenby(ir_entity *ent, int pos, ir_entity *overwrites)
 878 {
 879         assert(is_Class_type(get_entity_owner(ent)));
 880         assert(pos < get_entity_n_overwrittenby(ent));
 881         ent->overwrittenby[pos] = overwrites;
 882 }
 883
 884 void remove_entity_overwrittenby(ir_entity *ent, ir_entity *overwrites)
 885 {
 886         int i, n;
 887         assert(is_Class_type(get_entity_owner(ent)));
 888
 889         n = ARR_LEN(ent->overwrittenby);
 890         for (i = 0; i < n; ++i) {
 891                 if (ent->overwrittenby[i] == overwrites) {
 892                         for(; i < n - 1; ++i)
 893                                 ent->overwrittenby[i] = ent->overwrittenby[i+1];
 894                         ARR_SETLEN(ir_entity*, ent->overwrittenby, n - 1);
 895                         break;
 896                 }
 897         }
 898 }
 899
 900 void *(get_entity_link)(const ir_entity *ent)
 901 {
 902         return _get_entity_link(ent);
 903 }
 904
 905 void (set_entity_link)(ir_entity *ent, void *l)
 906 {
 907         _set_entity_link(ent, l);
 908 }
 909
 910 ir_graph *(get_entity_irg)(const ir_entity *ent)
 911 {
 912         return _get_entity_irg(ent);
 913 }
 914
 915 void set_entity_irg(ir_entity *ent, ir_graph *irg)
 916 {
 917         assert(is_method_entity(ent));
 918         assert(get_entity_peculiarity(ent) == peculiarity_existent);
 919         ent->attr.mtd_attr.irg = irg;
 920 }
 921
 922 unsigned get_entity_vtable_number(const ir_entity *ent)
 923 {
 924         assert(is_method_entity((ir_entity *)ent));
 925         return ent->attr.mtd_attr.vtable_number;
 926 }
 927
 928 void set_entity_vtable_number(ir_entity *ent, unsigned vtable_number)
 929 {
 930         assert(is_method_entity(ent));
 931         ent->attr.mtd_attr.vtable_number = vtable_number;
 932 }
 933
 934 int (is_entity)(const void *thing)
 935 {
 936         return _is_entity(thing);
 937 }
 938
 939 int is_atomic_entity(const ir_entity *ent)
 940 {
 941         ir_type *t      = get_entity_type(ent);
 942         const tp_op *op = get_type_tpop(t);
 943         return (op == type_primitive || op == type_pointer ||
 944                 op == type_enumeration || op == type_method);
 945 }
 946
 947 int is_compound_entity(const ir_entity *ent)
 948 {
 949         ir_type     *t  = get_entity_type(ent);
 950         const tp_op *op = get_type_tpop(t);
 951         return (op == type_class || op == type_struct ||
 952                 op == type_array || op == type_union);
 953 }
 954
 955 int is_method_entity(const ir_entity *ent)
 956 {
 957         ir_type *t = get_entity_type(ent);
 958         return is_Method_type(t);
 959 }
 960
 961 ir_visited_t (get_entity_visited)(const ir_entity *ent)
 962 {
 963         return _get_entity_visited(ent);
 964 }
 965
 966 void (set_entity_visited)(ir_entity *ent, ir_visited_t num)
 967 {
 968         _set_entity_visited(ent, num);
 969 }
 970
 971 void (mark_entity_visited)(ir_entity *ent)
 972 {
 973         _mark_entity_visited(ent);
 974 }
 975
 976 int (entity_visited)(const ir_entity *ent)
 977 {
 978         return _entity_visited(ent);
 979 }
 980
 981 int (entity_not_visited)(const ir_entity *ent)
 982 {
 983         return _entity_not_visited(ent);
 984 }
 985
 986 unsigned get_entity_additional_properties(const ir_entity *ent)
 987 {
 988         ir_graph *irg;
 989
 990         assert(is_method_entity(ent));
 991
 992         /* first check, if the graph has additional properties */
 993         irg = get_entity_irg(ent);
 994
 995         if (irg)
 996                 return get_irg_additional_properties(irg);
 997
 998         if (ent->attr.mtd_attr.irg_add_properties & mtp_property_inherited)
 999                 return get_method_additional_properties(get_entity_type(ent));
1000
1001         return ent->attr.mtd_attr.irg_add_properties;
1002 }
1003
1004 void set_entity_additional_properties(ir_entity *ent, unsigned property_mask)
1005 {
1006         ir_graph *irg;
1007
1008         assert(is_method_entity(ent));
1009
1010         /* first check, if the graph exists */
1011         irg = get_entity_irg(ent);
1012         if (irg)
1013                 set_irg_additional_properties(irg, property_mask);
1014         else {
1015     /* do not allow to set the mtp_property_inherited flag or
1016                 * the automatic inheritance of flags will not work */
1017                 ent->attr.mtd_attr.irg_add_properties = property_mask & ~mtp_property_inherited;
1018         }
1019 }
1020
1021 void set_entity_additional_property(ir_entity *ent, mtp_additional_property flag)
1022 {
1023         ir_graph *irg;
1024
1025         assert(is_method_entity(ent));
1026
1027         /* first check, if the graph exists */
1028         irg = get_entity_irg(ent);
1029         if (irg)
1030                 set_irg_additional_property(irg, flag);
1031         else {
1032                 unsigned mask = ent->attr.mtd_attr.irg_add_properties;
1033
1034                 if (mask & mtp_property_inherited)
1035                         mask = get_method_additional_properties(get_entity_type(ent));
1036
1037                         /* do not allow to set the mtp_property_inherited flag or
1038                 * the automatic inheritance of flags will not work */
1039                 ent->attr.mtd_attr.irg_add_properties = mask | (flag & ~mtp_property_inherited);
1040         }
1041 }
1042
1043 /* Returns the class type that this type info entity represents or NULL
1044    if ent is no type info entity. */
1045 ir_type *(get_entity_repr_class)(const ir_entity *ent)
1046 {
1047         return _get_entity_repr_class(ent);
1048 }
1049
1050 dbg_info *(get_entity_dbg_info)(const ir_entity *ent)
1051 {
1052         return _get_entity_dbg_info(ent);
1053 }
1054
1055 void (set_entity_dbg_info)(ir_entity *ent, dbg_info *db)
1056 {
1057         _set_entity_dbg_info(ent, db);
1058 }
1059
1060 int entity_is_externally_visible(const ir_entity *entity)
1061 {
1062         return get_entity_visibility(entity) != ir_visibility_local
1063                 || (get_entity_linkage(entity) & IR_LINKAGE_HIDDEN_USER);
1064 }
1065
1066 int entity_has_definition(const ir_entity *entity)
1067 {
1068         return entity->initializer != NULL
1069                 || get_entity_irg(entity) != NULL
1070                 || entity_has_compound_ent_values(entity);
1071 }
1072
1073 void firm_init_entity(void)
1074 {
1075         symconst_symbol sym;
1076
1077         assert(firm_unknown_type && "Call init_type() before firm_init_entity()!");
1078         assert(!unknown_entity && "Call firm_init_entity() only once!");
1079
1080         unknown_entity = new_rd_entity(NULL, firm_unknown_type, new_id_from_str(UNKNOWN_ENTITY_NAME), firm_unknown_type);
1081         set_entity_visibility(unknown_entity, ir_visibility_external);
1082
1083         set_entity_ld_ident(unknown_entity, get_entity_ident(unknown_entity));
1084
1085         current_ir_graph = get_const_code_irg();
1086         sym.entity_p     = unknown_entity;
1087 }
1088
1089 ir_allocation get_entity_allocation(const ir_entity *entity)
1090 {
1091         return entity->allocation;
1092 }
1093
1094 void set_entity_allocation(ir_entity *entity, ir_allocation allocation)
1095 {
1096         entity->allocation = allocation;
1097 }
1098
1099 ir_peculiarity get_entity_peculiarity(const ir_entity *entity)
1100 {
1101         return entity->peculiarity;
1102 }
1103
1104 void set_entity_peculiarity(ir_entity *entity, ir_peculiarity peculiarity)
1105 {
1106         entity->peculiarity = peculiarity;
1107 }
1108
1109 void set_entity_final(ir_entity *entity, int final)
1110 {
1111         entity->final = final;
1112 }
1113
1114 int is_entity_final(const ir_entity *entity)
1115 {
1116         return entity->final;
1117 }