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

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