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         ir_type *owner = ent->owner;
  68         switch (get_type_tpop_code(owner)) {
  69         case tpo_class:
  70                 add_class_member(owner, ent);
  71                 break;
  72         case tpo_struct:
  73                 add_struct_member(owner, ent);
  74                 break;
  75         case tpo_union:
  76                 add_union_member(owner, ent);
  77                 break;
  78         case tpo_array:
  79                 set_array_element_entity(owner, ent);
  80                 break;
  81         default:
  82                 panic("Unsupported type kind");
  83         }
  84 }  /* insert_entity_in_owner */
  85
  86 /**
  87  * Creates a new entity. This entity is NOT inserted in the owner type.
  88  *
  89  * @param db     debug info for this entity
  90  * @param owner  the owner type of the new entity
  91  * @param name   the name of the new entity
  92  * @param type   the type of the new entity
  93  *
  94  * @return the new created entity
  95  */
  96 static inline ir_entity *
  97 new_rd_entity(dbg_info *db, ir_type *owner, ident *name, ir_type *type)
  98 {
  99         ir_entity *res;
 100         ir_graph *rem;
 101
 102         assert(!id_contains_char(name, ' ') && "entity name should not contain spaces");
 103
 104         res = XMALLOCZ(ir_entity);
 105
 106         res->kind    = k_entity;
 107         res->name    = name;
 108         res->ld_name = NULL;
 109         res->type    = type;
 110         res->owner   = owner;
 111
 112         res->volatility           = volatility_non_volatile;
 113         res->aligned              = align_is_aligned;
 114         res->usage                = ir_usage_unknown;
 115         res->compiler_gen         = 0;
 116         res->backend_marked       = 0;
 117         res->offset               = -1;
 118         res->offset_bit_remainder = 0;
 119         res->alignment            = 0;
 120         res->link                 = NULL;
 121         res->repr_class           = NULL;
 122
 123         if (is_Method_type(type)) {
 124                 symconst_symbol sym;
 125                 ir_mode *mode = is_Method_type(type) ? mode_P_code : mode_P_data;
 126                 sym.entity_p            = res;
 127                 rem                     = current_ir_graph;
 128                 current_ir_graph        = get_const_code_irg();
 129                 set_atomic_ent_value(res, new_SymConst(mode, sym, symconst_addr_ent));
 130                 current_ir_graph        = rem;
 131                 res->linkage            = IR_LINKAGE_CONSTANT;
 132                 res->attr.mtd_attr.irg_add_properties = mtp_property_inherited;
 133                 res->attr.mtd_attr.vtable_number      = VTABLE_NUM_NOT_SET;
 134                 res->attr.mtd_attr.param_access       = NULL;
 135                 res->attr.mtd_attr.param_weight       = NULL;
 136                 res->attr.mtd_attr.irg                = NULL;
 137         } else if (is_compound_type(type)) {
 138                 res->attr.cmpd_attr.values    = NULL;
 139                 res->attr.cmpd_attr.val_paths = NULL;
 140         } else if (is_code_type(type)) {
 141                 res->attr.code_attr.label = (ir_label_t) -1;
 142         }
 143
 144         if (is_Class_type(owner)) {
 145                 res->overwrites    = NEW_ARR_F(ir_entity *, 0);
 146                 res->overwrittenby = NEW_ARR_F(ir_entity *, 0);
 147         } else {
 148                 res->overwrites    = NULL;
 149                 res->overwrittenby = NULL;
 150         }
 151
 152 #ifdef DEBUG_libfirm
 153         res->nr = get_irp_new_node_nr();
 154 #endif /* DEBUG_libfirm */
 155
 156         res->visit = 0;
 157         set_entity_dbg_info(res, db);
 158
 159         return res;
 160 }  /* new_rd_entity */
 161
 162 ir_entity *
 163 new_d_entity(ir_type *owner, ident *name, ir_type *type, dbg_info *db) {
 164         ir_entity *res;
 165
 166         assert(is_compound_type(owner));
 167         res = new_rd_entity(db, owner, name, type);
 168         /* Remember entity in it's owner. */
 169         insert_entity_in_owner(res);
 170
 171         hook_new_entity(res);
 172         return res;
 173 }  /* new_d_entity */
 174
 175 ir_entity *
 176 new_entity(ir_type *owner, ident *name, ir_type *type) {
 177         return new_d_entity(owner, name, type, NULL);
 178 }  /* new_entity */
 179
 180 /**
 181  * Free entity attributes.
 182  *
 183  * @param ent  the entity
 184  */
 185 static void free_entity_attrs(ir_entity *ent)
 186 {
 187         int i;
 188         if (get_type_tpop(get_entity_owner(ent)) == type_class) {
 189                 DEL_ARR_F(ent->overwrites);    ent->overwrites = NULL;
 190                 DEL_ARR_F(ent->overwrittenby); ent->overwrittenby = NULL;
 191         } else {
 192                 assert(ent->overwrites == NULL);
 193                 assert(ent->overwrittenby == NULL);
 194         }
 195         if (ent->initializer != NULL) {
 196                 /* TODO: free initializers */
 197         } else if (entity_has_compound_ent_values(ent)) {
 198                 if (ent->attr.cmpd_attr.val_paths) {
 199                         for (i = get_compound_ent_n_values(ent) - 1; i >= 0; --i)
 200                                 if (ent->attr.cmpd_attr.val_paths[i]) {
 201                                         /* free_compound_graph_path(ent->attr.cmpd_attr.val_paths[i]) ;  * @@@ warum nich? */
 202                                         /* Geht nich: wird mehrfach verwendet!!! ==> mehrfach frei gegeben. */
 203                                         /* DEL_ARR_F(ent->attr.cmpd_attr.val_paths); */
 204                                 }
 205                                 ent->attr.cmpd_attr.val_paths = NULL;
 206                 }
 207         }
 208         if (is_compound_entity(ent)) {
 209                 if (ent->attr.cmpd_attr.values) {
 210                         /*DEL_ARR_F(ent->attr.cmpd_attr.values)*/;
 211                 }
 212                 ent->attr.cmpd_attr.values = NULL;
 213         } else if (is_method_entity(ent)) {
 214                 if (ent->attr.mtd_attr.param_access) {
 215                         DEL_ARR_F(ent->attr.mtd_attr.param_access);
 216                         ent->attr.mtd_attr.param_access = NULL;
 217                 }
 218                 if (ent->attr.mtd_attr.param_weight) {
 219                         DEL_ARR_F(ent->attr.mtd_attr.param_weight);
 220                         ent->attr.mtd_attr.param_weight = NULL;
 221                 }
 222         }
 223 }  /* free_entity_attrs */
 224
 225 /**
 226  * Creates a deep copy of an entity.
 227  */
 228 static ir_entity *deep_entity_copy(ir_entity *old)
 229 {
 230         ir_entity *newe = XMALLOC(ir_entity);
 231
 232         *newe = *old;
 233         if (old->initializer != NULL) {
 234                 /* FIXME: the initializers are NOT copied */
 235         } else if (entity_has_compound_ent_values(old)) {
 236                 newe->attr.cmpd_attr.values    = NULL;
 237                 newe->attr.cmpd_attr.val_paths = NULL;
 238                 if (old->attr.cmpd_attr.values)
 239                         newe->attr.cmpd_attr.values = DUP_ARR_F(ir_node *, old->attr.cmpd_attr.values);
 240
 241                 /* FIXME: the compound graph paths are NOT copied */
 242                 if (old->attr.cmpd_attr.val_paths)
 243                         newe->attr.cmpd_attr.val_paths = DUP_ARR_F(compound_graph_path *, old->attr.cmpd_attr.val_paths);
 244         } else if (is_method_entity(old)) {
 245                 /* do NOT copy them, reanalyze. This might be the best solution */
 246                 newe->attr.mtd_attr.param_access = NULL;
 247                 newe->attr.mtd_attr.param_weight = NULL;
 248         }
 249
 250 #ifdef DEBUG_libfirm
 251         newe->nr = get_irp_new_node_nr();
 252 #endif
 253         return newe;
 254 }
 255 /*
 256  * Copies the entity if the new_owner is different from the
 257  * owner of the old entity,  else returns the old entity.
 258  */
 259 ir_entity *
 260 copy_entity_own(ir_entity *old, ir_type *new_owner) {
 261         ir_entity *newe;
 262         assert(is_entity(old));
 263         assert(is_compound_type(new_owner));
 264         assert(get_type_state(new_owner) != layout_fixed);
 265
 266         if (old->owner == new_owner)
 267                 return old;
 268
 269         /* create a deep copy so we are safe of aliasing and double-freeing. */
 270         newe = deep_entity_copy(old);
 271         newe->owner = new_owner;
 272
 273         if (is_Class_type(new_owner)) {
 274                 newe->overwrites    = NEW_ARR_F(ir_entity *, 0);
 275                 newe->overwrittenby = NEW_ARR_F(ir_entity *, 0);
 276         }
 277
 278         insert_entity_in_owner(newe);
 279         return newe;
 280 }  /* copy_entity_own */
 281
 282 ir_entity *
 283 copy_entity_name(ir_entity *old, ident *new_name) {
 284         ir_entity *newe;
 285         assert(old && old->kind == k_entity);
 286
 287         if (old->name == new_name) return old;
 288         newe = deep_entity_copy(old);
 289         newe->name = new_name;
 290         newe->ld_name = NULL;
 291
 292         if (is_Class_type(newe->owner)) {
 293                 newe->overwrites    = DUP_ARR_F(ir_entity *, old->overwrites);
 294                 newe->overwrittenby = DUP_ARR_F(ir_entity *, old->overwrittenby);
 295         }
 296         insert_entity_in_owner(newe);
 297
 298         return newe;
 299 }  /* copy_entity_name */
 300
 301 void
 302 free_entity(ir_entity *ent) {
 303         assert(ent && ent->kind == k_entity);
 304         free_entity_attrs(ent);
 305         ent->kind = k_BAD;
 306         free(ent);
 307 }  /* free_entity */
 308
 309 /* Outputs a unique number for this node */
 310 long
 311 get_entity_nr(const ir_entity *ent) {
 312         assert(ent && ent->kind == k_entity);
 313 #ifdef DEBUG_libfirm
 314         return ent->nr;
 315 #else
 316         return (long)PTR_TO_INT(ent);
 317 #endif
 318 }  /* get_entity_nr */
 319
 320 const char *
 321 (get_entity_name)(const ir_entity *ent) {
 322         return _get_entity_name(ent);
 323 }
 324
 325 ident *
 326 (get_entity_ident)(const ir_entity *ent) {
 327         return _get_entity_ident(ent);
 328 }
 329
 330 void
 331 (set_entity_ident)(ir_entity *ent, ident *id) {
 332         _set_entity_ident(ent, id);
 333 }
 334
 335 ir_type *
 336 (get_entity_owner)(const ir_entity *ent) {
 337         return _get_entity_owner(ent);
 338 }
 339
 340 void
 341 set_entity_owner(ir_entity *ent, ir_type *owner) {
 342         assert(is_entity(ent));
 343         assert(is_compound_type(owner));
 344         ent->owner = owner;
 345 }
 346
 347 ident *(get_entity_ld_ident)(const ir_entity *ent)
 348 {
 349         return _get_entity_ld_ident(ent);
 350 }
 351
 352 void
 353 (set_entity_ld_ident)(ir_entity *ent, ident *ld_ident) {
 354         _set_entity_ld_ident(ent, ld_ident);
 355 }
 356
 357 const char *(get_entity_ld_name)(const ir_entity *ent)
 358 {
 359         return _get_entity_ld_name(ent);
 360 }
 361
 362 ir_type *
 363 (get_entity_type)(const ir_entity *ent) {
 364         return _get_entity_type(ent);
 365 }
 366
 367 void
 368 (set_entity_type)(ir_entity *ent, ir_type *type) {
 369         _set_entity_type(ent, type);
 370 }
 371
 372 ir_volatility
 373 (get_entity_volatility)(const ir_entity *ent) {
 374         return _get_entity_volatility(ent);
 375 }
 376
 377 void
 378 (set_entity_volatility)(ir_entity *ent, ir_volatility vol) {
 379         _set_entity_volatility(ent, vol);
 380 }
 381
 382 /* Return the name of the volatility. */
 383 const char *get_volatility_name(ir_volatility var)
 384 {
 385 #define X(a)    case a: return #a
 386         switch (var) {
 387         X(volatility_non_volatile);
 388         X(volatility_is_volatile);
 389     default: return "BAD VALUE";
 390         }
 391 #undef X
 392 }  /* get_volatility_name */
 393
 394 ir_align
 395 (get_entity_aligned)(const ir_entity *ent) {
 396         return _get_entity_aligned(ent);
 397 }
 398
 399 void
 400 (set_entity_aligned)(ir_entity *ent, ir_align a) {
 401         _set_entity_aligned(ent, a);
 402 }
 403
 404 unsigned
 405 (get_entity_alignment)(const ir_entity *ent) {
 406         return _get_entity_alignment(ent);
 407 }
 408
 409 void
 410 (set_entity_alignment)(ir_entity *ent, unsigned alignment) {
 411         _set_entity_alignment(ent, alignment);
 412 }
 413
 414 /* Return the name of the alignment. */
 415 const char *get_align_name(ir_align a)
 416 {
 417 #define X(a)    case a: return #a
 418         switch (a) {
 419         X(align_non_aligned);
 420         X(align_is_aligned);
 421         default: return "BAD VALUE";
 422         }
 423 #undef X
 424 }  /* get_align_name */
 425
 426 void
 427 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_linkage(ir_entity *entity)
 438 {
 439         ir_linkage linkage = entity->linkage;
 440         /* local and extern are mutually exclusive */
 441         (void) linkage;
 442         assert(! ((linkage & IR_LINKAGE_EXTERN) && (linkage & IR_LINKAGE_LOCAL)));
 443         if (!is_method_entity(entity) && (linkage & IR_LINKAGE_EXTERN)) {
 444                 assert(!entity_has_definition(entity));
 445         }
 446         assert(! ((linkage & IR_LINKAGE_CONSTANT) && (linkage & IR_LINKAGE_WEAK)));
 447 }
 448
 449 void set_entity_linkage(ir_entity *entity, ir_linkage linkage)
 450 {
 451         entity->linkage = linkage;
 452         verify_linkage(entity);
 453 }
 454
 455 ir_linkage (get_entity_linkage)(const ir_entity *entity)
 456 {
 457         return get_entity_linkage(entity);
 458 }
 459
 460 void add_entity_linkage(ir_entity *entity, ir_linkage linkage)
 461 {
 462         entity->linkage |= linkage;
 463         verify_linkage(entity);
 464 }
 465
 466 void remove_entity_linkage(ir_entity *entity, ir_linkage linkage)
 467 {
 468         entity->linkage &= ~linkage;
 469         verify_linkage(entity);
 470 }
 471
 472 /* Checks if an entity is compiler generated */
 473 int (is_entity_compiler_generated)(const ir_entity *ent) {
 474         return _is_entity_compiler_generated(ent);
 475 }  /* is_entity_compiler_generated */
 476
 477 /* Sets/resets the compiler generated flag */
 478 void (set_entity_compiler_generated)(ir_entity *ent, int flag) {
 479         _set_entity_compiler_generated(ent, flag);
 480 }  /* set_entity_compiler_generated */
 481
 482 /* Checks if an entity is marked by the backend */
 483 int (is_entity_backend_marked)(const ir_entity *ent) {
 484         return _is_entity_backend_marked(ent);
 485 }  /* is_entity_backend_marked */
 486
 487 /* Sets/resets the compiler generated flag */
 488 void (set_entity_backend_marked)(ir_entity *ent, int flag) {
 489         _set_entity_backend_marked(ent, flag);
 490 }  /* set_entity_backend_marked */
 491
 492 ir_entity_usage (get_entity_usage)(const ir_entity *ent) {
 493         return _get_entity_usage(ent);
 494 }
 495
 496 void (set_entity_usage)(ir_entity *ent, ir_entity_usage flags) {
 497         _set_entity_usage(ent, flags);
 498 }
 499
 500 /* Set has no effect for existent entities of type method. */
 501 ir_node *get_atomic_ent_value(ir_entity *entity)
 502 {
 503         ir_initializer_t *initializer = get_entity_initializer(entity);
 504
 505         assert(entity && is_atomic_entity(entity));
 506         if (initializer == NULL) {
 507                 ir_type *type = get_entity_type(entity);
 508                 return new_r_Unknown(get_const_code_irg(), get_type_mode(type));
 509         }
 510
 511         switch (get_initializer_kind(initializer)) {
 512         case IR_INITIALIZER_NULL: {
 513                 ir_type *type = get_entity_type(entity);
 514                 ir_mode *mode = get_type_mode(type);
 515                 return new_r_Const(get_const_code_irg(), get_mode_null(mode));
 516         }
 517         case IR_INITIALIZER_TARVAL: {
 518                 tarval *tv = get_initializer_tarval_value(initializer);
 519                 return new_r_Const(get_const_code_irg(), tv);
 520         }
 521         case IR_INITIALIZER_CONST:
 522                 return get_initializer_const_value(initializer);
 523         case IR_INITIALIZER_COMPOUND:
 524                 panic("compound initializer in atomic entity not allowed (%+F)", entity);
 525         }
 526
 527         panic("invalid initializer kind in get_atomic_ent_value(%+F)", entity);
 528 }
 529
 530 void set_atomic_ent_value(ir_entity *entity, ir_node *val)
 531 {
 532         ir_initializer_t *initializer;
 533
 534         assert(is_atomic_entity(entity));
 535         assert(get_entity_peculiarity(entity) != peculiarity_description);
 536
 537         assert(is_Dummy(val) || get_irn_mode(val) == get_type_mode(entity->type));
 538         initializer = create_initializer_const(val);
 539         entity->initializer = initializer;
 540 }
 541
 542 /* Returns true if the the node is representable as code on
 543  *  const_code_irg. */
 544 int is_irn_const_expression(ir_node *n) {
 545         ir_mode *m;
 546
 547         /* we are in danger iff an exception will arise. TODO: be more precisely,
 548          * for instance Div. will NOT rise if divisor != 0
 549          */
 550         if (is_binop(n) && !is_fragile_op(n))
 551                 return is_irn_const_expression(get_binop_left(n)) && is_irn_const_expression(get_binop_right(n));
 552
 553         m = get_irn_mode(n);
 554         switch (get_irn_opcode(n)) {
 555         case iro_Const:
 556         case iro_SymConst:
 557         case iro_Unknown:
 558                 return 1;
 559         case iro_Conv:
 560         case iro_Cast:
 561                 return is_irn_const_expression(get_irn_n(n, 0));
 562         default:
 563                 break;
 564         }
 565         return 0;
 566 }  /* is_irn_const_expression */
 567
 568 /*
 569  * Copies a firm subgraph that complies to the restrictions for
 570  * constant expressions to current_block in current_ir_graph.
 571  */
 572 ir_node *copy_const_value(dbg_info *dbg, ir_node *n) {
 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_linkage(entity) & IR_LINKAGE_LOCAL) == 0;
1055 }
1056
1057 int entity_has_definition(const ir_entity *entity)
1058 {
1059         return entity->initializer != NULL
1060                 || get_entity_irg(entity) != NULL
1061                 || entity_has_compound_ent_values(entity);
1062 }
1063
1064 void firm_init_entity(void)
1065 {
1066         symconst_symbol sym;
1067
1068         assert(firm_unknown_type && "Call init_type() before firm_init_entity()!");
1069         assert(!unknown_entity && "Call firm_init_entity() only once!");
1070
1071         unknown_entity = new_rd_entity(NULL, firm_unknown_type, new_id_from_str(UNKNOWN_ENTITY_NAME), firm_unknown_type);
1072         set_entity_linkage(unknown_entity, IR_LINKAGE_EXTERN);
1073
1074         set_entity_ld_ident(unknown_entity, get_entity_ident(unknown_entity));
1075
1076         current_ir_graph = get_const_code_irg();
1077         sym.entity_p     = unknown_entity;
1078 }
1079
1080 ir_allocation get_entity_allocation(const ir_entity *entity)
1081 {
1082         return entity->allocation;
1083 }
1084
1085 void set_entity_allocation(ir_entity *entity, ir_allocation allocation)
1086 {
1087         entity->allocation = allocation;
1088 }
1089
1090 ir_peculiarity get_entity_peculiarity(const ir_entity *entity)
1091 {
1092         return entity->peculiarity;
1093 }
1094
1095 void set_entity_peculiarity(ir_entity *entity, ir_peculiarity peculiarity)
1096 {
1097         entity->peculiarity = peculiarity;
1098 }
1099
1100 void set_entity_final(ir_entity *entity, int final)
1101 {
1102         entity->final = final;
1103 }
1104
1105 int is_entity_final(const ir_entity *entity)
1106 {
1107         return entity->final;
1108 }