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

   1 /*
   2  * Copyright (C) 1995-2007 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 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <stddef.h>
  33
  34 #include "firm_common_t.h"
  35
  36 #include "xmalloc.h"
  37 #include "entity_t.h"
  38 #include "array.h"
  39 #include "irtools.h"
  40 #include "irhooks.h"
  41 #include "irprintf.h"
  42
  43 /* All this is needed to build the constant node for methods: */
  44 #include "irprog_t.h"
  45 #include "ircons.h"
  46 #include "tv_t.h"
  47 #include "irdump.h"  /* for output if errors occur. */
  48
  49 #include "callgraph.h"  /* for dumping debug output */
  50
  51 /**
  52  * An interval initializer.
  53  */
  54 typedef struct interval_initializer interval_initializer;
  55
  56 /**
  57  * A value initializer.
  58  */
  59 typedef struct value_initializer value_initializer;
  60
  61 struct interval_initializer {
  62         int                  first_index; /**< The first index of the initialized interval. */
  63         int                  last_index;  /**< The last index of the initialized interval. */
  64         interval_initializer *next;       /**< Points to the next interval initializer. */
  65 };
  66
  67 struct value_initializer {
  68         ir_entity *ent;           /**< The initialized entity. */
  69         value_initializer *next;  /**< Points to the next value initializer. */
  70 };
  71
  72 typedef union initializer {
  73         ir_node              *value;     /**< The value of the initializer. */
  74         ir_node              **values;   /**< The values of an interval. */
  75         value_initializer    *val_init;  /**< Points the the head of the next value initializers. */
  76         interval_initializer *int_init;  /**< Points to the head of the next value initializers. */
  77 } initializer;
  78
  79 /*-----------------------------------------------------------------*/
  80 /** general                                                       **/
  81 /*-----------------------------------------------------------------*/
  82
  83 ir_entity *unknown_entity = NULL;
  84
  85 ir_entity *get_unknown_entity(void) { return unknown_entity; }
  86
  87 /** The name of the unknown entity. */
  88 #define UNKNOWN_ENTITY_NAME "unknown_entity"
  89
  90 /*-----------------------------------------------------------------*/
  91 /* ENTITY                                                          */
  92 /*-----------------------------------------------------------------*/
  93
  94 /**
  95  * Add an entity to it's already set owner type.
  96  */
  97 static INLINE void insert_entity_in_owner(ir_entity *ent) {
  98         ir_type *owner = ent->owner;
  99         switch (get_type_tpop_code(owner)) {
 100         case tpo_class:
 101                 add_class_member(owner, ent);
 102                 break;
 103         case tpo_struct:
 104                 add_struct_member(owner, ent);
 105                 break;
 106         case tpo_union:
 107                 add_union_member(owner, ent);
 108                 break;
 109         case tpo_array:
 110                 set_array_element_entity(owner, ent);
 111                 break;
 112         default: assert(0);
 113         }
 114 }  /* insert_entity_in_owner */
 115
 116 /**
 117  * Creates a new entity. This entity is NOT inserted in the owner type.
 118  *
 119  * @param db     debug info for this entity
 120  * @param owner  the owner type of the new entity
 121  * @param name   the name of the new entity
 122  * @param type   the type of the new entity
 123  *
 124  * @return the new created entity
 125  */
 126 static INLINE ir_entity *
 127 new_rd_entity(dbg_info *db, ir_type *owner, ident *name, ir_type *type)
 128 {
 129         ir_entity *res;
 130         ir_graph *rem;
 131
 132         assert(!id_contains_char(name, ' ') && "entity name should not contain spaces");
 133
 134         res = xmalloc(sizeof(*res));
 135         memset(res, 0, sizeof(*res));
 136
 137         res->kind    = k_entity;
 138         res->name    = name;
 139         res->ld_name = NULL;
 140         res->type    = type;
 141         res->owner   = owner;
 142
 143         res->allocation           = allocation_automatic;
 144         res->visibility           = visibility_local;
 145         res->volatility           = volatility_non_volatile;
 146         res->align                = align_is_aligned;
 147         res->stickyness           = stickyness_unsticky;
 148         res->peculiarity          = peculiarity_existent;
 149         res->address_taken        = ir_address_taken_unknown;
 150         res->final                = 0;
 151         res->compiler_gen         = 0;
 152         res->backend_marked       = 0;
 153         res->offset               = -1;
 154         res->offset_bit_remainder = 0;
 155         res->link                 = NULL;
 156         res->repr_class           = NULL;
 157
 158         if (is_Method_type(type)) {
 159                 symconst_symbol sym;
 160                 sym.entity_p            = res;
 161                 rem                     = current_ir_graph;
 162                 current_ir_graph        = get_const_code_irg();
 163                 res->value              = new_SymConst(sym, symconst_addr_ent);
 164                 current_ir_graph        = rem;
 165                 res->allocation         = allocation_static;
 166                 res->variability        = variability_constant;
 167                 res->attr.mtd_attr.irg_add_properties = mtp_property_inherited;
 168                 res->attr.mtd_attr.vtable_number      = VTABLE_NUM_NOT_SET;
 169                 res->attr.mtd_attr.param_access       = NULL;
 170                 res->attr.mtd_attr.param_weight       = NULL;
 171                 res->attr.mtd_attr.irg                = NULL;
 172                 res->attr.mtd_attr.section            = section_text;
 173         } else if (is_compound_type(type)) {
 174                 res->variability = variability_uninitialized;
 175                 res->value       = NULL;
 176                 res->attr.cmpd_attr.values    = NULL;
 177                 res->attr.cmpd_attr.val_paths = NULL;
 178         } else {
 179                 res->variability = variability_uninitialized;
 180                 res->value       = NULL;
 181         }
 182
 183         if (is_Class_type(owner)) {
 184                 res->overwrites    = NEW_ARR_F(ir_entity *, 0);
 185                 res->overwrittenby = NEW_ARR_F(ir_entity *, 0);
 186         } else {
 187                 res->overwrites    = NULL;
 188                 res->overwrittenby = NULL;
 189         }
 190
 191 #ifdef DEBUG_libfirm
 192         res->nr = get_irp_new_node_nr();
 193 #endif /* DEBUG_libfirm */
 194
 195         res->visit = 0;
 196         set_entity_dbg_info(res, db);
 197
 198         return res;
 199 }  /* new_rd_entity */
 200
 201 ir_entity *
 202 new_d_entity(ir_type *owner, ident *name, ir_type *type, dbg_info *db) {
 203         ir_entity *res;
 204
 205         assert(is_compound_type(owner));
 206         res = new_rd_entity(db, owner, name, type);
 207         /* Remember entity in it's owner. */
 208         insert_entity_in_owner(res);
 209
 210         hook_new_entity(res);
 211         return res;
 212 }  /* new_d_entity */
 213
 214 ir_entity *
 215 new_entity(ir_type *owner, ident *name, ir_type *type) {
 216         return new_d_entity(owner, name, type, NULL);
 217 }  /* new_entity */
 218
 219 /**
 220  * Free entity attributes.
 221  *
 222  * @param ent  the entity
 223  */
 224 static void free_entity_attrs(ir_entity *ent) {
 225         int i;
 226         if (get_type_tpop(get_entity_owner(ent)) == type_class) {
 227                 DEL_ARR_F(ent->overwrites);    ent->overwrites = NULL;
 228                 DEL_ARR_F(ent->overwrittenby); ent->overwrittenby = NULL;
 229         } else {
 230                 assert(ent->overwrites == NULL);
 231                 assert(ent->overwrittenby == NULL);
 232         }
 233         if (is_compound_entity(ent)) {
 234                 if (ent->attr.cmpd_attr.val_paths) {
 235                         for (i = get_compound_ent_n_values(ent) - 1; i >= 0; --i)
 236                                 if (ent->attr.cmpd_attr.val_paths[i]) {
 237                                         /* free_compound_graph_path(ent->attr.cmpd_attr.val_paths[i]) ;  * @@@ warum nich? */
 238                                         /* Geht nich: wird mehrfach verwendet!!! ==> mehrfach frei gegeben. */
 239                                         /* DEL_ARR_F(ent->attr.cmpd_attr.val_paths); */
 240                                 }
 241                                 ent->attr.cmpd_attr.val_paths = NULL;
 242                 }
 243                 /* if (ent->attr.cmpd_attr.values) DEL_ARR_F(ent->attr.cmpd_attr.values); *//* @@@ warum nich? */
 244                 ent->attr.cmpd_attr.values = NULL;
 245         } else if (is_method_entity(ent)) {
 246                 if (ent->attr.mtd_attr.param_access) {
 247                         DEL_ARR_F(ent->attr.mtd_attr.param_access);
 248                         ent->attr.mtd_attr.param_access = NULL;
 249                 }
 250                 if (ent->attr.mtd_attr.param_weight) {
 251                         DEL_ARR_F(ent->attr.mtd_attr.param_weight);
 252                         ent->attr.mtd_attr.param_weight = NULL;
 253                 }
 254         }
 255 }  /* free_entity_attrs */
 256
 257 ir_entity *
 258 copy_entity_own(ir_entity *old, ir_type *new_owner) {
 259         ir_entity *newe;
 260         assert(is_entity(old));
 261         assert(is_compound_type(new_owner));
 262
 263         if (old->owner == new_owner) return old;
 264         newe = xmalloc(sizeof(*newe));
 265         memcpy(newe, old, sizeof(*newe));
 266         newe->owner = new_owner;
 267         if (is_Class_type(new_owner)) {
 268                 newe->overwrites    = NEW_ARR_F(ir_entity *, 0);
 269                 newe->overwrittenby = NEW_ARR_F(ir_entity *, 0);
 270         }
 271 #ifdef DEBUG_libfirm
 272         newe->nr = get_irp_new_node_nr();
 273 #endif
 274
 275         insert_entity_in_owner(newe);
 276
 277         return newe;
 278 }  /* copy_entity_own */
 279
 280 ir_entity *
 281 copy_entity_name(ir_entity *old, ident *new_name) {
 282         ir_entity *newe;
 283         assert(old && old->kind == k_entity);
 284
 285         if (old->name == new_name) return old;
 286         newe = xmalloc(sizeof(*newe));
 287         memcpy(newe, old, sizeof(*newe));
 288         newe->name = new_name;
 289         newe->ld_name = NULL;
 290         if (is_Class_type(newe->owner)) {
 291                 newe->overwrites    = DUP_ARR_F(ir_entity *, old->overwrites);
 292                 newe->overwrittenby = DUP_ARR_F(ir_entity *, old->overwrittenby);
 293         }
 294 #ifdef DEBUG_libfirm
 295         newe->nr = get_irp_new_node_nr();
 296 #endif
 297
 298         insert_entity_in_owner(newe);
 299
 300         return newe;
 301 }  /* copy_entity_name */
 302
 303
 304 void
 305 free_entity(ir_entity *ent) {
 306         assert(ent && ent->kind == k_entity);
 307         free_entity_attrs(ent);
 308         ent->kind = k_BAD;
 309         free(ent);
 310 }  /* free_entity */
 311
 312 /* Outputs a unique number for this node */
 313 long
 314 get_entity_nr(const ir_entity *ent) {
 315         assert(ent && ent->kind == k_entity);
 316 #ifdef DEBUG_libfirm
 317         return ent->nr;
 318 #else
 319         return (long)PTR_TO_INT(ent);
 320 #endif
 321 }  /* get_entity_nr */
 322
 323 const char *
 324 (get_entity_name)(const ir_entity *ent) {
 325         return _get_entity_name(ent);
 326 }  /* get_entity_name */
 327
 328 ident *
 329 (get_entity_ident)(const ir_entity *ent) {
 330         return _get_entity_ident(ent);
 331 }  /* get_entity_ident */
 332
 333 void
 334 (set_entity_ident)(ir_entity *ent, ident *id) {
 335         _set_entity_ident(ent, id);
 336 }  /* set_entity_ident */
 337
 338 ir_type *
 339 (get_entity_owner)(ir_entity *ent) {
 340         return _get_entity_owner(ent);
 341 }  /* get_entity_owner */
 342
 343 void
 344 set_entity_owner(ir_entity *ent, ir_type *owner) {
 345         assert(is_entity(ent));
 346         assert(is_compound_type(owner));
 347         ent->owner = owner;
 348 }  /* set_entity_owner */
 349
 350 ident *
 351 (get_entity_ld_ident)(ir_entity *ent) {
 352         return _get_entity_ld_ident(ent);
 353 }  /* get_entity_ld_ident */
 354
 355 void
 356 (set_entity_ld_ident)(ir_entity *ent, ident *ld_ident) {
 357         _set_entity_ld_ident(ent, ld_ident);
 358 }  /* set_entity_ld_ident */
 359
 360 const char *
 361 (get_entity_ld_name)(ir_entity *ent) {
 362         return _get_entity_ld_name(ent);
 363 }  /* get_entity_ld_name */
 364
 365 ir_type *
 366 (get_entity_type)(ir_entity *ent) {
 367         return _get_entity_type(ent);
 368 }  /* get_entity_type */
 369
 370 void
 371 (set_entity_type)(ir_entity *ent, ir_type *type) {
 372         _set_entity_type(ent, type);
 373 }  /* set_entity_type */
 374
 375 ir_allocation
 376 (get_entity_allocation)(const ir_entity *ent) {
 377         return _get_entity_allocation(ent);
 378 }  /* get_entity_allocation */
 379
 380 void
 381 (set_entity_allocation)(ir_entity *ent, ir_allocation al) {
 382         _set_entity_allocation(ent, al);
 383 }  /* set_entity_allocation */
 384
 385 /* return the name of the visibility */
 386 const char *get_allocation_name(ir_allocation all)
 387 {
 388 #define X(a)    case a: return #a
 389         switch (all) {
 390         X(allocation_automatic);
 391         X(allocation_parameter);
 392         X(allocation_dynamic);
 393         X(allocation_static);
 394     default: return "BAD VALUE";
 395         }
 396 #undef X
 397 }  /* get_allocation_name */
 398
 399 ir_visibility
 400 (get_entity_visibility)(const ir_entity *ent) {
 401         return _get_entity_visibility(ent);
 402 }  /* get_entity_visibility */
 403
 404 void
 405 set_entity_visibility(ir_entity *ent, ir_visibility vis) {
 406         assert(ent && ent->kind == k_entity);
 407         if (vis != visibility_local)
 408                 assert((ent->allocation == allocation_static) ||
 409                 (ent->allocation == allocation_automatic));
 410                 /* @@@ Test that the owner type is not local, but how??
 411         && get_class_visibility(get_entity_owner(ent)) != local));*/
 412         ent->visibility = vis;
 413 }  /* set_entity_visibility */
 414
 415 /* return the name of the visibility */
 416 const char *get_visibility_name(ir_visibility vis)
 417 {
 418 #define X(a)    case a: return #a
 419         switch (vis) {
 420         X(visibility_local);
 421         X(visibility_external_visible);
 422         X(visibility_external_allocated);
 423     default: return "BAD VALUE";
 424         }
 425 #undef X
 426 }  /* get_visibility_name */
 427
 428 ir_variability
 429 (get_entity_variability)(const ir_entity *ent) {
 430         return _get_entity_variability(ent);
 431 }  /* get_entity_variability */
 432
 433 void
 434 set_entity_variability(ir_entity *ent, ir_variability var)
 435 {
 436         assert(ent && ent->kind == k_entity);
 437         if (var == variability_part_constant)
 438                 assert(is_Class_type(ent->type) || is_Struct_type(ent->type));
 439
 440         if ((is_compound_type(ent->type)) &&
 441                 (ent->variability == variability_uninitialized) && (var != variability_uninitialized)) {
 442                 /* Allocate data structures for constant values */
 443                 ent->attr.cmpd_attr.values    = NEW_ARR_F(ir_node *, 0);
 444                 ent->attr.cmpd_attr.val_paths = NEW_ARR_F(compound_graph_path *, 0);
 445         }
 446         if ((is_atomic_type(ent->type)) &&
 447                 (ent->variability == variability_uninitialized) && (var != variability_uninitialized)) {
 448                 /* Set default constant value. */
 449                 ent->value = new_rd_Unknown(get_const_code_irg(), get_type_mode(ent->type));
 450         }
 451
 452         if ((is_compound_type(ent->type)) &&
 453                 (var == variability_uninitialized) && (ent->variability != variability_uninitialized)) {
 454                 /* Free data structures for constant values */
 455                 DEL_ARR_F(ent->attr.cmpd_attr.values);    ent->attr.cmpd_attr.values    = NULL;
 456                 DEL_ARR_F(ent->attr.cmpd_attr.val_paths); ent->attr.cmpd_attr.val_paths = NULL;
 457         }
 458         ent->variability = var;
 459 }  /* set_entity_variability */
 460
 461 /* return the name of the variability */
 462 const char *get_variability_name(ir_variability var)
 463 {
 464 #define X(a)    case a: return #a
 465         switch (var) {
 466         X(variability_uninitialized);
 467         X(variability_initialized);
 468         X(variability_part_constant);
 469         X(variability_constant);
 470     default: return "BAD VALUE";
 471         }
 472 #undef X
 473 }  /* get_variability_name */
 474
 475 ir_volatility
 476 (get_entity_volatility)(const ir_entity *ent) {
 477         return _get_entity_volatility(ent);
 478 }  /* get_entity_volatility */
 479
 480 void
 481 (set_entity_volatility)(ir_entity *ent, ir_volatility vol) {
 482         _set_entity_volatility(ent, vol);
 483 }  /* set_entity_volatility */
 484
 485 /* Return the name of the volatility. */
 486 const char *get_volatility_name(ir_volatility var)
 487 {
 488 #define X(a)    case a: return #a
 489         switch (var) {
 490         X(volatility_non_volatile);
 491         X(volatility_is_volatile);
 492     default: return "BAD VALUE";
 493         }
 494 #undef X
 495 }  /* get_volatility_name */
 496
 497 ir_align
 498 (get_entity_align)(const ir_entity *ent) {
 499         return _get_entity_align(ent);
 500 }  /* get_entity_align */
 501
 502 void
 503 (set_entity_align)(ir_entity *ent, ir_align a) {
 504         _set_entity_align(ent, a);
 505 }  /* set_entity_align */
 506
 507 /* Return the name of the alignment. */
 508 const char *get_align_name(ir_align a)
 509 {
 510 #define X(a)    case a: return #a
 511         switch (a) {
 512         X(align_non_aligned);
 513         X(align_is_aligned);
 514         default: return "BAD VALUE";
 515         }
 516 #undef X
 517 }  /* get_align_name */
 518
 519 ir_peculiarity
 520 (get_entity_peculiarity)(const ir_entity *ent) {
 521         return _get_entity_peculiarity(ent);
 522 }  /* get_entity_peculiarity */
 523
 524 void
 525 (set_entity_peculiarity)(ir_entity *ent, ir_peculiarity pec) {
 526         _set_entity_peculiarity(ent, pec);
 527 }  /* set_entity_peculiarity */
 528
 529 /* Checks if an entity cannot be overridden anymore. */
 530 int (is_entity_final)(const ir_entity *ent) {
 531         return _is_entity_final(ent);
 532 }  /* is_entity_final */
 533
 534 /* Sets/resets the final flag of an entity. */
 535 void (set_entity_final)(ir_entity *ent, int final) {
 536         _set_entity_final(ent, final);
 537 }  /* set_entity_final */
 538
 539 /* Checks if an entity is compiler generated */
 540 int (is_entity_compiler_generated)(const ir_entity *ent) {
 541         return _is_entity_compiler_generated(ent);
 542 }  /* is_entity_compiler_generated */
 543
 544 /* Sets/resets the compiler generated flag */
 545 void (set_entity_compiler_generated)(ir_entity *ent, int flag) {
 546         _set_entity_compiler_generated(ent, flag);
 547 }  /* set_entity_compiler_generated */
 548
 549 /* Checks if an entity is marked by the backend */
 550 int (is_entity_backend_marked)(const ir_entity *ent) {
 551         return _is_entity_backend_marked(ent);
 552 }  /* is_entity_backend_marked */
 553
 554 /* Sets/resets the compiler generated flag */
 555 void (set_entity_backend_marked)(ir_entity *ent, int flag) {
 556         _set_entity_backend_marked(ent, flag);
 557 }  /* set_entity_backend_marked */
 558
 559 /* Checks if the address of an entity was taken. */
 560 ir_address_taken_state (get_entity_address_taken)(const ir_entity *ent) {
 561         return _get_entity_address_taken(ent);
 562 }  /* is_entity_address_taken */
 563
 564 /* Sets/resets the address taken flag. */
 565 void (set_entity_address_taken)(ir_entity *ent, ir_address_taken_state flag) {
 566         _set_entity_address_taken(ent, flag);
 567 }  /* set_entity_address_taken */
 568
 569 /* Return the name of the address_taken state. */
 570 const char *get_address_taken_state_name(ir_address_taken_state state) {
 571 #define X(a)    case a: return #a
 572         switch (state) {
 573         X(ir_address_not_taken);
 574         X(ir_address_taken_unknown);
 575         X(ir_address_taken);
 576     default: return "BAD VALUE";
 577         }
 578 #undef X
 579 }  /* get_address_taken_state_name */
 580
 581 /* Get the entity's stickyness */
 582 ir_stickyness
 583 (get_entity_stickyness)(const ir_entity *ent) {
 584         return _get_entity_stickyness(ent);
 585 }  /* get_entity_stickyness */
 586
 587 /* Set the entity's stickyness */
 588 void
 589 (set_entity_stickyness)(ir_entity *ent, ir_stickyness stickyness) {
 590         _set_entity_stickyness(ent, stickyness);
 591 }  /* set_entity_stickyness */
 592
 593 /* Set has no effect for existent entities of type method. */
 594 ir_node *
 595 get_atomic_ent_value(ir_entity *ent)
 596 {
 597         assert(ent && is_atomic_entity(ent));
 598         assert(ent->variability != variability_uninitialized);
 599         return skip_Id(ent->value);
 600 }  /* get_atomic_ent_value */
 601
 602 void
 603 set_atomic_ent_value(ir_entity *ent, ir_node *val) {
 604         assert(is_atomic_entity(ent) && (ent->variability != variability_uninitialized));
 605         if (is_Method_type(ent->type) && (ent->peculiarity == peculiarity_existent))
 606                 return;
 607         ent->value = val;
 608 }  /* set_atomic_ent_value */
 609
 610 /* Returns true if the the node is representable as code on
 611  *  const_code_irg. */
 612 int is_irn_const_expression(ir_node *n) {
 613         ir_mode *m;
 614
 615         /* we are in danger iff an exception will arise. TODO: be more precisely,
 616          * for instance Div. will NOT rise if divisor != 0
 617          */
 618         if (is_binop(n) && !is_fragile_op(n))
 619                 return is_irn_const_expression(get_binop_left(n)) && is_irn_const_expression(get_binop_right(n));
 620
 621         m = get_irn_mode(n);
 622         switch (get_irn_opcode(n)) {
 623         case iro_Const:
 624         case iro_SymConst:
 625         case iro_Unknown:
 626                 return 1;
 627         case iro_Conv:
 628         case iro_Cast:
 629                 return is_irn_const_expression(get_irn_n(n, 0));
 630         default:
 631                 break;
 632         }
 633         return 0;
 634 }  /* is_irn_const_expression */
 635
 636 /*
 637  * Copies a firm subgraph that complies to the restrictions for
 638  * constant expressions to current_block in current_ir_graph.
 639  */
 640 ir_node *copy_const_value(dbg_info *dbg, ir_node *n) {
 641         ir_node *nn;
 642         ir_mode *m;
 643
 644         /* @@@ GL I think  we should implement this using the routines from irgopt for
 645                dead node elimination/inlineing. */
 646
 647         m = get_irn_mode(n);
 648         switch (get_irn_opcode(n)) {
 649         case iro_Const:
 650                 nn = new_d_Const_type(dbg, m, get_Const_tarval(n), get_Const_type(n));
 651                 break;
 652         case iro_SymConst:
 653                 nn = new_d_SymConst_type(dbg, get_SymConst_symbol(n), get_SymConst_kind(n),
 654                         get_SymConst_value_type(n));
 655                 break;
 656         case iro_Add:
 657                 nn = new_d_Add(dbg, copy_const_value(dbg, get_Add_left(n)),
 658                         copy_const_value(dbg, get_Add_right(n)), m); break;
 659         case iro_Sub:
 660                 nn = new_d_Sub(dbg, copy_const_value(dbg, get_Sub_left(n)),
 661                         copy_const_value(dbg, get_Sub_right(n)), m); break;
 662         case iro_Mul:
 663                 nn = new_d_Mul(dbg, copy_const_value(dbg, get_Mul_left(n)),
 664                         copy_const_value(dbg, get_Mul_right(n)), m); break;
 665         case iro_And:
 666                 nn = new_d_And(dbg, copy_const_value(dbg, get_And_left(n)),
 667                         copy_const_value(dbg, get_And_right(n)), m); break;
 668         case iro_Or:
 669                 nn = new_d_Or(dbg, copy_const_value(dbg, get_Or_left(n)),
 670                         copy_const_value(dbg, get_Or_right(n)), m); break;
 671         case iro_Eor:
 672                 nn = new_d_Eor(dbg, copy_const_value(dbg, get_Eor_left(n)),
 673                         copy_const_value(dbg, get_Eor_right(n)), m); break;
 674         case iro_Cast:
 675                 nn = new_d_Cast(dbg, copy_const_value(dbg, get_Cast_op(n)), get_Cast_type(n)); break;
 676         case iro_Conv:
 677                 nn = new_d_Conv(dbg, copy_const_value(dbg, get_Conv_op(n)), m); break;
 678         case iro_Unknown:
 679                 nn = new_d_Unknown(m); break;
 680         default:
 681                 assert(0 && "opcode invalid or not implemented");
 682                 nn = NULL;
 683                 break;
 684         }
 685         return nn;
 686 }  /* copy_const_value */
 687
 688 /* Creates a new compound graph path. */
 689 compound_graph_path *
 690 new_compound_graph_path(ir_type *tp, int length) {
 691         compound_graph_path *res;
 692
 693         assert(is_compound_type(tp));
 694         assert(length > 0);
 695
 696         res = xmalloc(sizeof(*res) + (length-1) * sizeof(res->list[0]));
 697         memset(res, 0, sizeof(*res) + (length-1) * sizeof(res->list[0]));
 698         res->kind         = k_ir_compound_graph_path;
 699         res->tp           = tp;
 700         res->len          = length;
 701
 702         return res;
 703 }  /* new_compound_graph_path */
 704
 705 /* Frees an graph path object */
 706 void free_compound_graph_path (compound_graph_path *gr) {
 707         assert(gr && is_compound_graph_path(gr));
 708         gr->kind = k_BAD;
 709         free(gr);
 710 }  /* free_compound_graph_path */
 711
 712 /* Returns non-zero if an object is a compound graph path */
 713 int is_compound_graph_path(const void *thing) {
 714         return (get_kind(thing) == k_ir_compound_graph_path);
 715 }  /* is_compound_graph_path */
 716
 717 /* Checks whether the path up to pos is correct. If the path contains a NULL,
 718  *  assumes the path is not complete and returns 'true'. */
 719 int is_proper_compound_graph_path(compound_graph_path *gr, int pos) {
 720         int i;
 721         ir_entity *node;
 722         ir_type *owner = gr->tp;
 723
 724         for (i = 0; i <= pos; i++) {
 725                 node = get_compound_graph_path_node(gr, i);
 726                 if (node == NULL)
 727                         /* Path not yet complete. */
 728                         return 1;
 729                 if (get_entity_owner(node) != owner)
 730                         return 0;
 731                 owner = get_entity_type(node);
 732         }
 733         if (pos == get_compound_graph_path_length(gr))
 734                 if (!is_atomic_type(owner))
 735                         return 0;
 736                 return 1;
 737 }  /* is_proper_compound_graph_path */
 738
 739 /* Returns the length of a graph path */
 740 int get_compound_graph_path_length(const compound_graph_path *gr) {
 741         assert(gr && is_compound_graph_path(gr));
 742         return gr->len;
 743 }  /* get_compound_graph_path_length */
 744
 745 ir_entity *
 746 get_compound_graph_path_node(const compound_graph_path *gr, int pos) {
 747         assert(gr && is_compound_graph_path(gr));
 748         assert(pos >= 0 && pos < gr->len);
 749         return gr->list[pos].node;
 750 }  /* get_compound_graph_path_node */
 751
 752 void
 753 set_compound_graph_path_node(compound_graph_path *gr, int pos, ir_entity *node) {
 754         assert(gr && is_compound_graph_path(gr));
 755         assert(pos >= 0 && pos < gr->len);
 756         assert(is_entity(node));
 757         gr->list[pos].node = node;
 758         assert(is_proper_compound_graph_path(gr, pos));
 759 }  /* set_compound_graph_path_node */
 760
 761 int
 762 get_compound_graph_path_array_index(const compound_graph_path *gr, int pos) {
 763         assert(gr && is_compound_graph_path(gr));
 764         assert(pos >= 0 && pos < gr->len);
 765         return gr->list[pos].index;
 766 }  /* get_compound_graph_path_array_index */
 767
 768 void
 769 set_compound_graph_path_array_index(compound_graph_path *gr, int pos, int index) {
 770         assert(gr && is_compound_graph_path(gr));
 771         assert(pos >= 0 && pos < gr->len);
 772         gr->list[pos].index = index;
 773 }  /* set_compound_graph_path_array_index */
 774
 775 /* A value of a compound entity is a pair of value and the corresponding path to a member of
 776    the compound. */
 777 void
 778 add_compound_ent_value_w_path(ir_entity *ent, ir_node *val, compound_graph_path *path) {
 779         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 780         assert(is_compound_graph_path(path));
 781         ARR_APP1(ir_node *, ent->attr.cmpd_attr.values, val);
 782         ARR_APP1(compound_graph_path *, ent->attr.cmpd_attr.val_paths, path);
 783 }  /* add_compound_ent_value_w_path */
 784
 785 void
 786 set_compound_ent_value_w_path(ir_entity *ent, ir_node *val, compound_graph_path *path, int pos) {
 787         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 788         assert(is_compound_graph_path(path));
 789         assert(0 <= pos && pos < ARR_LEN(ent->attr.cmpd_attr.values));
 790         ent->attr.cmpd_attr.values[pos]    = val;
 791         ent->attr.cmpd_attr.val_paths[pos] = path;
 792 }  /* set_compound_ent_value_w_path */
 793
 794 int
 795 get_compound_ent_n_values(ir_entity *ent) {
 796         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 797         return ARR_LEN(ent->attr.cmpd_attr.values);
 798 }  /* get_compound_ent_n_values */
 799
 800 ir_node *
 801 get_compound_ent_value(ir_entity *ent, int pos) {
 802         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 803         assert(0 <= pos && pos < ARR_LEN(ent->attr.cmpd_attr.values));
 804         return ent->attr.cmpd_attr.values[pos];
 805 }  /* get_compound_ent_value */
 806
 807 compound_graph_path *
 808 get_compound_ent_value_path(ir_entity *ent, int pos) {
 809         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 810         assert(0 <= pos && pos < ARR_LEN(ent->attr.cmpd_attr.val_paths));
 811         return ent->attr.cmpd_attr.val_paths[pos];
 812 }  /* get_compound_ent_value_path */
 813
 814 /**
 815  * Returns non-zero, if two compound_graph_pathes are equal
 816  *
 817  * @param path1            the first path
 818  * @param visited_indices
 819  * @param path2            the second path
 820  */
 821 static int equal_paths(compound_graph_path *path1, int *visited_indices, compound_graph_path *path2) {
 822         int i;
 823         int len1 = get_compound_graph_path_length(path1);
 824         int len2 = get_compound_graph_path_length(path2);
 825
 826         if (len2 != len1) return 0;
 827
 828         for (i = 0; i < len1; i++) {
 829                 ir_type *tp;
 830                 ir_entity *node1 = get_compound_graph_path_node(path1, i);
 831                 ir_entity *node2 = get_compound_graph_path_node(path2, i);
 832
 833                 if (node1 != node2) return 0;
 834
 835                 /* FIXME: Strange code. What is it good for? */
 836                 tp = get_entity_owner(node1);
 837                 if (is_Array_type(tp)) {
 838                         long low;
 839
 840                         /* Compute the index of this node. */
 841                         assert(get_array_n_dimensions(tp) == 1 && "multidim not implemented");
 842
 843                         low = get_array_lower_bound_int(tp, 0);
 844                         if (low + visited_indices[i] < get_compound_graph_path_array_index(path2, i)) {
 845                                 visited_indices[i]++;
 846                                 return 0;
 847                         } else
 848                                 assert(low + visited_indices[i] == get_compound_graph_path_array_index(path2, i));
 849                 }
 850         }
 851         return 1;
 852 }  /* equal_paths */
 853
 854 /**
 855  * Returns the position of a value with the given path.
 856  * The path must contain array indices for all array element entities.
 857  *
 858  * @todo  This implementation is very slow (O(number of initializers^2) and should
 859  *        be replaced when the new tree oriented
 860  *        value representation is finally implemented.
 861  */
 862 static int get_compound_ent_pos_by_path(ir_entity *ent, compound_graph_path *path) {
 863         int i, n_paths = get_compound_ent_n_values(ent);
 864         int *visited_indices;
 865         int path_len = get_compound_graph_path_length(path);
 866
 867         NEW_ARR_A(int *, visited_indices, path_len);
 868         memset(visited_indices, 0, sizeof(*visited_indices) * path_len);
 869         for (i = 0; i < n_paths; i ++) {
 870                 if (equal_paths(get_compound_ent_value_path(ent, i), visited_indices, path))
 871                         return i;
 872         }
 873
 874 #if 0
 875         {
 876                 int j;
 877                 printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
 878                 printf("Entity %s : ", get_entity_name(ent));
 879                 for (j = 0; j < get_compound_graph_path_length(path); ++j) {
 880                         ir_entity *node = get_compound_graph_path_node(path, j);
 881                         printf("%s", get_entity_name(node));
 882                         if (is_Array_type(get_entity_owner(node)))
 883                                 printf("[%d]", get_compound_graph_path_array_index(path, j));
 884                 }
 885                 printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
 886         }
 887 #endif
 888
 889         assert(0 && "path not found");
 890         return -1;
 891 }  /* get_compound_ent_pos_by_path */
 892
 893 /* Returns a constant value given the access path.
 894  *  The path must contain array indices for all array element entities. */
 895 ir_node *get_compound_ent_value_by_path(ir_entity *ent, compound_graph_path *path) {
 896         return get_compound_ent_value(ent, get_compound_ent_pos_by_path(ent, path));
 897 }  /* get_compound_ent_value_by_path */
 898
 899
 900 void
 901 remove_compound_ent_value(ir_entity *ent, ir_entity *value_ent) {
 902         int i;
 903         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 904         for (i = 0; i < (ARR_LEN(ent->attr.cmpd_attr.val_paths)); ++i) {
 905                 compound_graph_path *path = ent->attr.cmpd_attr.val_paths[i];
 906                 if (path->list[path->len-1].node == value_ent) {
 907                         for (; i < (ARR_LEN(ent->attr.cmpd_attr.val_paths))-1; ++i) {
 908                                 ent->attr.cmpd_attr.val_paths[i] = ent->attr.cmpd_attr.val_paths[i+1];
 909                                 ent->attr.cmpd_attr.values[i]    = ent->attr.cmpd_attr.values[i+1];
 910                         }
 911                         ARR_SETLEN(ir_entity*, ent->attr.cmpd_attr.val_paths, ARR_LEN(ent->attr.cmpd_attr.val_paths) - 1);
 912                         ARR_SETLEN(ir_node*,   ent->attr.cmpd_attr.values,    ARR_LEN(ent->attr.cmpd_attr.values)    - 1);
 913                         break;
 914                 }
 915         }
 916 }  /* remove_compound_ent_value */
 917
 918 void
 919 add_compound_ent_value(ir_entity *ent, ir_node *val, ir_entity *member) {
 920         compound_graph_path *path;
 921         ir_type *owner_tp = get_entity_owner(member);
 922         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 923         path = new_compound_graph_path(get_entity_type(ent), 1);
 924         path->list[0].node = member;
 925         if (is_Array_type(owner_tp)) {
 926                 int max;
 927                 int i, n;
 928
 929                 assert(get_array_n_dimensions(owner_tp) == 1 && has_array_lower_bound(owner_tp, 0));
 930                 max = get_array_lower_bound_int(owner_tp, 0) -1;
 931                 for (i = 0, n = get_compound_ent_n_values(ent); i < n; ++i) {
 932                         int index = get_compound_graph_path_array_index(get_compound_ent_value_path(ent, i), 0);
 933                         if (index > max) {
 934                                 max = index;
 935                         }
 936                 }
 937                 path->list[0].index = max + 1;
 938         }
 939         add_compound_ent_value_w_path(ent, val, path);
 940 }  /* add_compound_ent_value */
 941
 942
 943 ir_entity *
 944 get_compound_ent_value_member(ir_entity *ent, int pos) {
 945         compound_graph_path *path;
 946         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 947         path = get_compound_ent_value_path(ent, pos);
 948
 949         return get_compound_graph_path_node(path, get_compound_graph_path_length(path)-1);
 950 }  /* get_compound_ent_value_member */
 951
 952 void
 953 set_compound_ent_value(ir_entity *ent, ir_node *val, ir_entity *member, int pos) {
 954         compound_graph_path *path;
 955         assert(is_compound_entity(ent) && (ent->variability != variability_uninitialized));
 956         path = get_compound_ent_value_path(ent, pos);
 957         set_compound_graph_path_node(path, 0, member);
 958         set_compound_ent_value_w_path(ent, val, path, pos);
 959 }  /* set_compound_ent_value */
 960
 961 void
 962 set_array_entity_values(ir_entity *ent, tarval **values, int num_vals) {
 963         int i;
 964         ir_graph *rem = current_ir_graph;
 965         ir_type *arrtp = get_entity_type(ent);
 966         ir_node *val;
 967         ir_type *elttp = get_array_element_type(arrtp);
 968
 969         assert(is_Array_type(arrtp));
 970         assert(get_array_n_dimensions(arrtp) == 1);
 971         /* One bound is sufficient, the number of constant fields makes the
 972            size. */
 973         assert(get_array_lower_bound (arrtp, 0) || get_array_upper_bound (arrtp, 0));
 974         assert(get_entity_variability(ent) != variability_uninitialized);
 975         current_ir_graph = get_const_code_irg();
 976
 977         for (i = 0; i < num_vals; i++) {
 978                 val = new_Const_type(values[i], elttp);
 979                 add_compound_ent_value(ent, val, get_array_element_entity(arrtp));
 980                 set_compound_graph_path_array_index(get_compound_ent_value_path(ent, i), 0, i);
 981         }
 982         current_ir_graph = rem;
 983 }  /* set_array_entity_values */
 984
 985 /* Return the overall offset of value at position pos in bytes. */
 986 int get_compound_ent_value_offset_bytes(ir_entity *ent, int pos) {
 987         compound_graph_path *path;
 988         int path_len, i;
 989         int offset = 0;
 990         ir_type *curr_tp;
 991
 992         assert(get_type_state(get_entity_type(ent)) == layout_fixed);
 993
 994         path = get_compound_ent_value_path(ent, pos);
 995         path_len = get_compound_graph_path_length(path);
 996         curr_tp = path->tp;
 997
 998         for (i = 0; i < path_len; ++i) {
 999                 ir_entity *node = get_compound_graph_path_node(path, i);
1000                 ir_type *node_tp = get_entity_type(node);
1001
1002                 if (is_Array_type(curr_tp)) {
1003                         int size  = get_type_size_bits(node_tp);
1004                         int align = get_type_alignment_bits(node_tp);
1005                         int idx;
1006
1007                         assert(size > 0);
1008                         if(size % align > 0) {
1009                                 size += align - (size % align);
1010                         }
1011                         assert(size % 8 == 0);
1012                         size /= 8;
1013                         idx = get_compound_graph_path_array_index(path, i);
1014                         assert(idx >= 0);
1015                         offset += size * idx;
1016                 } else {
1017                         offset += get_entity_offset(node);
1018                 }
1019                 curr_tp = node_tp;
1020         }
1021
1022         return offset;
1023 }  /* get_compound_ent_value_offset_bytes */
1024
1025 /* Return the offset in bits from the last byte address. */
1026 int get_compound_ent_value_offset_bit_remainder(ir_entity *ent, int pos) {
1027         compound_graph_path *path;
1028         int path_len;
1029         ir_entity *last_node;
1030
1031         assert(get_type_state(get_entity_type(ent)) == layout_fixed);
1032
1033         path = get_compound_ent_value_path(ent, pos);
1034         path_len = get_compound_graph_path_length(path);
1035         last_node = get_compound_graph_path_node(path, path_len - 1);
1036
1037         return get_entity_offset_bits_remainder(last_node);
1038 }  /* get_compound_ent_value_offset_bit_remainder */
1039
1040 int
1041 (get_entity_offset)(const ir_entity *ent) {
1042         return _get_entity_offset(ent);
1043 }  /* get_entity_offset */
1044
1045 void
1046 (set_entity_offset)(ir_entity *ent, int offset) {
1047         _set_entity_offset(ent, offset);
1048 }  /* set_entity_offset */
1049
1050 unsigned char
1051 (get_entity_offset_bits_remainder)(const ir_entity *ent) {
1052         return _get_entity_offset_bits_remainder(ent);
1053 }  /* get_entity_offset_bits_remainder */
1054
1055 void
1056 (set_entity_offset_bits_remainder)(ir_entity *ent, unsigned char offset) {
1057         _set_entity_offset_bits_remainder(ent, offset);
1058 }  /* set_entity_offset_bits_remainder */
1059
1060 void
1061 add_entity_overwrites(ir_entity *ent, ir_entity *overwritten) {
1062 #ifndef NDEBUG
1063         ir_type *owner     = get_entity_owner(ent);
1064         ir_type *ovw_ovner = get_entity_owner(overwritten);
1065         assert(is_Class_type(owner));
1066         assert(is_Class_type(ovw_ovner));
1067         assert(! is_class_final(ovw_ovner));
1068 #endif /* NDEBUG */
1069         ARR_APP1(ir_entity *, ent->overwrites, overwritten);
1070         ARR_APP1(ir_entity *, overwritten->overwrittenby, ent);
1071 }  /* add_entity_overwrites */
1072
1073 int
1074 get_entity_n_overwrites(ir_entity *ent) {
1075         assert(is_Class_type(get_entity_owner(ent)));
1076         return (ARR_LEN(ent->overwrites));
1077 }  /* get_entity_n_overwrites */
1078
1079 int
1080 get_entity_overwrites_index(ir_entity *ent, ir_entity *overwritten) {
1081         int i;
1082         assert(is_Class_type(get_entity_owner(ent)));
1083         for (i = 0; i < get_entity_n_overwrites(ent); i++)
1084                 if (get_entity_overwrites(ent, i) == overwritten)
1085                         return i;
1086         return -1;
1087 }  /* get_entity_overwrites_index */
1088
1089 ir_entity *
1090 get_entity_overwrites(ir_entity *ent, int pos) {
1091         assert(is_Class_type(get_entity_owner(ent)));
1092         assert(pos < get_entity_n_overwrites(ent));
1093         return ent->overwrites[pos];
1094 }  /* get_entity_overwrites */
1095
1096 void
1097 set_entity_overwrites(ir_entity *ent, int pos, ir_entity *overwritten) {
1098         assert(is_Class_type(get_entity_owner(ent)));
1099         assert(pos < get_entity_n_overwrites(ent));
1100         ent->overwrites[pos] = overwritten;
1101 }  /* set_entity_overwrites */
1102
1103 void
1104 remove_entity_overwrites(ir_entity *ent, ir_entity *overwritten) {
1105         int i;
1106         assert(is_Class_type(get_entity_owner(ent)));
1107         for (i = 0; i < (ARR_LEN (ent->overwrites)); i++)
1108                 if (ent->overwrites[i] == overwritten) {
1109                         for(; i < (ARR_LEN (ent->overwrites))-1; i++)
1110                                 ent->overwrites[i] = ent->overwrites[i+1];
1111                         ARR_SETLEN(ir_entity*, ent->overwrites, ARR_LEN(ent->overwrites) - 1);
1112                         break;
1113                 }
1114 }  /* remove_entity_overwrites */
1115
1116 void
1117 add_entity_overwrittenby(ir_entity *ent, ir_entity *overwrites) {
1118         add_entity_overwrites(overwrites, ent);
1119 }  /* add_entity_overwrittenby */
1120
1121 int
1122 get_entity_n_overwrittenby(ir_entity *ent) {
1123         assert(is_Class_type(get_entity_owner(ent)));
1124         return (ARR_LEN (ent->overwrittenby));
1125 }  /* get_entity_n_overwrittenby */
1126
1127 int
1128 get_entity_overwrittenby_index(ir_entity *ent, ir_entity *overwrites) {
1129         int i;
1130         assert(is_Class_type(get_entity_owner(ent)));
1131         for (i = 0; i < get_entity_n_overwrittenby(ent); i++)
1132                 if (get_entity_overwrittenby(ent, i) == overwrites)
1133                         return i;
1134         return -1;
1135 }  /* get_entity_overwrittenby_index */
1136
1137 ir_entity *
1138 get_entity_overwrittenby(ir_entity *ent, int pos) {
1139         assert(is_Class_type(get_entity_owner(ent)));
1140         assert(pos < get_entity_n_overwrittenby(ent));
1141         return ent->overwrittenby[pos];
1142 }  /* get_entity_overwrittenby */
1143
1144 void
1145 set_entity_overwrittenby(ir_entity *ent, int pos, ir_entity *overwrites) {
1146         assert(is_Class_type(get_entity_owner(ent)));
1147         assert(pos < get_entity_n_overwrittenby(ent));
1148         ent->overwrittenby[pos] = overwrites;
1149 }  /* set_entity_overwrittenby */
1150
1151 void    remove_entity_overwrittenby(ir_entity *ent, ir_entity *overwrites) {
1152         int i;
1153         assert(is_Class_type(get_entity_owner(ent)));
1154         for (i = 0; i < (ARR_LEN (ent->overwrittenby)); i++)
1155                 if (ent->overwrittenby[i] == overwrites) {
1156                         for(; i < (ARR_LEN (ent->overwrittenby))-1; i++)
1157                                 ent->overwrittenby[i] = ent->overwrittenby[i+1];
1158                         ARR_SETLEN(ir_entity*, ent->overwrittenby, ARR_LEN(ent->overwrittenby) - 1);
1159                         break;
1160                 }
1161 }  /* remove_entity_overwrittenby */
1162
1163 /* A link to store intermediate information */
1164 void *
1165 (get_entity_link)(const ir_entity *ent) {
1166         return _get_entity_link(ent);
1167 }  /* get_entity_link */
1168
1169 void
1170 (set_entity_link)(ir_entity *ent, void *l) {
1171         _set_entity_link(ent, l);
1172 }  /* set_entity_link */
1173
1174 ir_graph *
1175 (get_entity_irg)(const ir_entity *ent) {
1176         return _get_entity_irg(ent);
1177 }  /* get_entity_irg */
1178
1179 void
1180 set_entity_irg(ir_entity *ent, ir_graph *irg) {
1181         assert(is_method_entity(ent));
1182         /* Wie kann man die Referenz auf einen IRG löschen, z.B. wenn die
1183          * Methode selbst nicht mehr aufgerufen werden kann, die Entität
1184          * aber erhalten bleiben soll?  Wandle die Entitaet in description oder
1185          * inherited um! */
1186         /* assert(irg); */
1187         assert((irg  && ent->peculiarity == peculiarity_existent) ||
1188                 (!irg && (ent->peculiarity == peculiarity_existent)
1189                 && (ent -> visibility == visibility_external_allocated)) ||
1190                 (!irg && ent->peculiarity == peculiarity_description) ||
1191                 (!irg && ent->peculiarity == peculiarity_inherited));
1192         ent->attr.mtd_attr.irg = irg;
1193 }  /* set_entity_irg */
1194
1195 unsigned get_entity_vtable_number(const ir_entity *ent) {
1196         assert(is_method_entity((ir_entity *)ent));
1197         return ent->attr.mtd_attr.vtable_number;
1198 }  /* get_entity_vtable_number */
1199
1200 void set_entity_vtable_number(ir_entity *ent, unsigned vtable_number) {
1201         assert(is_method_entity(ent));
1202         ent->attr.mtd_attr.vtable_number = vtable_number;
1203 }  /* set_entity_vtable_number */
1204
1205 /* Returns the section of a method. */
1206 ir_img_section get_method_img_section(const ir_entity *ent) {
1207         assert(is_method_entity((ir_entity *)ent));
1208         return ent->attr.mtd_attr.section;
1209 }  /* get_method_img_section */
1210
1211 /* Sets the section of a method. */
1212 void set_method_img_section(ir_entity *ent, ir_img_section section) {
1213         assert(is_method_entity(ent));
1214         ent->attr.mtd_attr.section = section;
1215 }  /* set_method_img_section */
1216
1217 int
1218 (is_entity)(const void *thing) {
1219         return _is_entity(thing);
1220 }  /* is_entity */
1221
1222 int is_atomic_entity(ir_entity *ent) {
1223         ir_type *t      = get_entity_type(ent);
1224         const tp_op *op = get_type_tpop(t);
1225         return (op == type_primitive || op == type_pointer ||
1226                 op == type_enumeration || op == type_method);
1227 }  /* is_atomic_entity */
1228
1229 int is_compound_entity(ir_entity *ent) {
1230         ir_type     *t  = get_entity_type(ent);
1231         const tp_op *op = get_type_tpop(t);
1232         return (op == type_class || op == type_struct ||
1233                 op == type_array || op == type_union);
1234 }  /* is_compound_entity */
1235
1236 int is_method_entity(ir_entity *ent) {
1237         ir_type *t = get_entity_type(ent);
1238         return is_Method_type(t);
1239 }  /* is_method_entity */
1240
1241 /**
1242  * @todo not implemented!!! */
1243 int equal_entity(ir_entity *ent1, ir_entity *ent2) {
1244         (void) ent1;
1245         (void) ent2;
1246         fprintf(stderr, " calling unimplemented equal entity!!! \n");
1247         return 1;
1248 }  /* equal_entity */
1249
1250
1251 unsigned long (get_entity_visited)(ir_entity *ent) {
1252         return _get_entity_visited(ent);
1253 }  /* get_entity_visited */
1254
1255 void (set_entity_visited)(ir_entity *ent, unsigned long num) {
1256         _set_entity_visited(ent, num);
1257 }  /* set_entity_visited */
1258
1259 /* Sets visited field in ir_entity to entity_visited. */
1260 void (mark_entity_visited)(ir_entity *ent) {
1261         _mark_entity_visited(ent);
1262 }  /* mark_entity_visited */
1263
1264 int (entity_visited)(ir_entity *ent) {
1265         return _entity_visited(ent);
1266 }  /* entity_visited */
1267
1268 int (entity_not_visited)(ir_entity *ent) {
1269         return _entity_not_visited(ent);
1270 }  /* entity_not_visited */
1271
1272 /* Returns the mask of the additional entity properties. */
1273 unsigned get_entity_additional_properties(ir_entity *ent) {
1274         ir_graph *irg;
1275
1276         assert(is_method_entity(ent));
1277
1278         /* first check, if the graph has additional properties */
1279         irg = get_entity_irg(ent);
1280
1281         if (irg)
1282                 return get_irg_additional_properties(irg);
1283
1284         if (ent->attr.mtd_attr.irg_add_properties & mtp_property_inherited)
1285                 return get_method_additional_properties(get_entity_type(ent));
1286
1287         return ent->attr.mtd_attr.irg_add_properties;
1288 }  /* get_entity_additional_properties */
1289
1290 /* Sets the mask of the additional graph properties. */
1291 void set_entity_additional_properties(ir_entity *ent, unsigned property_mask)
1292 {
1293         ir_graph *irg;
1294
1295         assert(is_method_entity(ent));
1296
1297         /* first check, if the graph exists */
1298         irg = get_entity_irg(ent);
1299         if (irg)
1300                 set_irg_additional_properties(irg, property_mask);
1301         else {
1302     /* do not allow to set the mtp_property_inherited flag or
1303                 * the automatic inheritance of flags will not work */
1304                 ent->attr.mtd_attr.irg_add_properties = property_mask & ~mtp_property_inherited;
1305         }
1306 }  /* set_entity_additional_properties */
1307
1308 /* Sets one additional graph property. */
1309 void set_entity_additional_property(ir_entity *ent, mtp_additional_property flag)
1310 {
1311         ir_graph *irg;
1312
1313         assert(is_method_entity(ent));
1314
1315         /* first check, if the graph exists */
1316         irg = get_entity_irg(ent);
1317         if (irg)
1318                 set_irg_additional_property(irg, flag);
1319         else {
1320                 unsigned mask = ent->attr.mtd_attr.irg_add_properties;
1321
1322                 if (mask & mtp_property_inherited)
1323                         mask = get_method_additional_properties(get_entity_type(ent));
1324
1325                         /* do not allow to set the mtp_property_inherited flag or
1326                 * the automatic inheritance of flags will not work */
1327                 ent->attr.mtd_attr.irg_add_properties = mask | (flag & ~mtp_property_inherited);
1328         }
1329 }  /* set_entity_additional_property */
1330
1331 /* Returns the class type that this type info entity represents or NULL
1332    if ent is no type info entity. */
1333 ir_type *(get_entity_repr_class)(const ir_entity *ent) {
1334         return _get_entity_repr_class(ent);
1335 }  /* get_entity_repr_class */
1336
1337 dbg_info *(get_entity_dbg_info)(const ir_entity *ent) {
1338         return _get_entity_dbg_info(ent);
1339 }  /* get_entity_dbg_info */
1340
1341 void (set_entity_dbg_info)(ir_entity *ent, dbg_info *db) {
1342         _set_entity_dbg_info(ent, db);
1343 }  /* set_entity_dbg_info */
1344
1345 /* Initialize entity module. */
1346 void firm_init_entity(void)
1347 {
1348         symconst_symbol sym;
1349
1350         assert(firm_unknown_type && "Call init_type() before firm_init_entity()!");
1351         assert(!unknown_entity && "Call firm_init_entity() only once!");
1352
1353         unknown_entity = new_rd_entity(NULL, firm_unknown_type, new_id_from_str(UNKNOWN_ENTITY_NAME), firm_unknown_type);
1354         set_entity_visibility(unknown_entity, visibility_external_allocated);
1355         set_entity_ld_ident(unknown_entity, get_entity_ident(unknown_entity));
1356
1357         current_ir_graph      = get_const_code_irg();
1358         sym.entity_p          = unknown_entity;
1359         unknown_entity->value = new_SymConst(sym, symconst_addr_ent);
1360 }  /* firm_init_entity */