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