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