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

   1 /*
   2  * Copyright (C) 1995-2011 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  */
  25 #include "config.h"
  26
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <stddef.h>
  30
  31 #include "xmalloc.h"
  32 #include "entity_t.h"
  33 #include "array.h"
  34 #include "util.h"
  35 #include "irhooks.h"
  36 #include "irprintf.h"
  37
  38 #include "irprog_t.h"
  39 #include "ircons.h"
  40 #include "tv_t.h"
  41 #include "irdump.h"
  42 #include "irgraph_t.h"
  43 #include "callgraph.h"
  44 #include "error.h"
  45 #include "compound_path.h"
  46
  47 /** The name of the unknown entity. */
  48 #define UNKNOWN_ENTITY_NAME "unknown_entity"
  49
  50 ir_entity *get_unknown_entity(void)
  51 {
  52         return irp->unknown_entity;
  53 }
  54
  55 /*-----------------------------------------------------------------*/
  56 /* ENTITY                                                          */
  57 /*-----------------------------------------------------------------*/
  58
  59 static ir_entity *intern_new_entity(ir_type *owner, ir_entity_kind kind,
  60                                     ident *name, ir_type *type, dbg_info *dbgi)
  61 {
  62         ir_entity *res = XMALLOCZ(ir_entity);
  63
  64         res->kind    = k_entity;
  65         res->name    = name;
  66         res->ld_name = NULL;
  67         res->type    = type;
  68         res->owner   = owner;
  69
  70         res->entity_kind          = kind;
  71         res->volatility           = volatility_non_volatile;
  72         res->aligned              = align_is_aligned;
  73         res->usage                = ir_usage_unknown;
  74         res->compiler_gen         = 0;
  75         res->visibility           = ir_visibility_default;
  76         res->offset               = -1;
  77         res->offset_bit_remainder = 0;
  78         res->alignment            = 0;
  79         res->link                 = NULL;
  80         res->repr_class           = NULL;
  81 #ifdef DEBUG_libfirm
  82         res->nr = get_irp_new_node_nr();
  83 #endif
  84
  85         /* Remember entity in its owner. */
  86         if (owner != NULL)
  87                 add_compound_member(owner, res);
  88
  89         res->visit = 0;
  90         set_entity_dbg_info(res, dbgi);
  91
  92         return res;
  93 }
  94
  95 ir_entity *new_d_entity(ir_type *owner, ident *name, ir_type *type,
  96                         dbg_info *db)
  97 {
  98         ir_entity *res;
  99
 100         if (is_Method_type(type)) {
 101                 ir_graph *irg = get_const_code_irg();
 102                 symconst_symbol sym;
 103                 ir_mode *mode = is_Method_type(type) ? mode_P_code : mode_P_data;
 104                 res = intern_new_entity(owner, IR_ENTITY_METHOD, name, type, db);
 105                 sym.entity_p            = res;
 106                 set_atomic_ent_value(res, new_r_SymConst(irg, mode, sym, symconst_addr_ent));
 107                 res->linkage            = IR_LINKAGE_CONSTANT;
 108                 res->attr.mtd_attr.irg_add_properties = mtp_property_inherited;
 109                 res->attr.mtd_attr.vtable_number      = IR_VTABLE_NUM_NOT_SET;
 110                 res->attr.mtd_attr.param_access       = NULL;
 111                 res->attr.mtd_attr.param_weight       = NULL;
 112                 res->attr.mtd_attr.irg                = NULL;
 113         } else if (owner != NULL
 114                    && (is_compound_type(owner) && !(owner->flags & tf_segment))) {
 115                 res = intern_new_entity(owner, IR_ENTITY_COMPOUND_MEMBER, name, type, db);
 116                 res->attr.cmpd_attr.values    = NULL;
 117                 res->attr.cmpd_attr.val_paths = NULL;
 118         } else {
 119                 res = intern_new_entity(owner, IR_ENTITY_NORMAL, name, type, db);
 120         }
 121
 122         hook_new_entity(res);
 123         return res;
 124 }
 125
 126 ir_entity *new_entity(ir_type *owner, ident *name, ir_type *type)
 127 {
 128         return new_d_entity(owner, name, type, NULL);
 129 }
 130
 131 static ident *make_parameter_entity_name(size_t pos)
 132 {
 133         char buf[64];
 134         snprintf(buf, sizeof(buf), "parameter.%lu", (unsigned long) pos);
 135         return new_id_from_str(buf);
 136 }
 137
 138 ir_entity *new_d_parameter_entity(ir_type *owner, size_t pos, ir_type *type,
 139                                   dbg_info *dbgi)
 140 {
 141         ident     *name = make_parameter_entity_name(pos);
 142         ir_entity *res
 143                 = intern_new_entity(owner, IR_ENTITY_PARAMETER, name, type, dbgi);
 144         res->attr.parameter.number = pos;
 145         hook_new_entity(res);
 146         return res;
 147 }
 148
 149 ir_entity *new_parameter_entity(ir_type *owner, size_t pos, ir_type *type)
 150 {
 151         return new_d_parameter_entity(owner, pos, type, NULL);
 152 }
 153
 154 ir_entity *new_d_label_entity(ir_label_t label, dbg_info *dbgi)
 155 {
 156         ident *name = id_unique("label_%u");
 157         ir_type *global_type = get_glob_type();
 158         ir_entity *res
 159                 = intern_new_entity(global_type, IR_ENTITY_LABEL, name, get_code_type(),
 160                                     dbgi);
 161         res->attr.code_attr.label = label;
 162         hook_new_entity(res);
 163         return res;
 164 }
 165
 166 ir_entity *new_label_entity(ir_label_t label)
 167 {
 168         return new_d_label_entity(label, NULL);
 169 }
 170
 171 /**
 172  * Free entity attributes.
 173  *
 174  * @param ent  the entity
 175  */
 176 static void free_entity_attrs(ir_entity *ent)
 177 {
 178         if (ent->overwrites != NULL) {
 179                 DEL_ARR_F(ent->overwrites);
 180                 ent->overwrites = NULL;
 181         }
 182         if (ent->overwrittenby != NULL) {
 183                 DEL_ARR_F(ent->overwrittenby);
 184                 ent->overwrittenby = NULL;
 185         }
 186
 187         if (ent->initializer != NULL) {
 188                 /* TODO: free initializers */
 189         } else if (entity_has_compound_ent_values(ent)) {
 190                 /* can't free compound graph path as it might be used
 191                  * multiple times */
 192                 ent->attr.cmpd_attr.val_paths = NULL;
 193         }
 194         if (ent->entity_kind == IR_ENTITY_COMPOUND_MEMBER) {
 195                 ent->attr.cmpd_attr.values = NULL;
 196         } else if (ent->entity_kind == IR_ENTITY_METHOD) {
 197                 if (ent->attr.mtd_attr.param_access) {
 198                         DEL_ARR_F(ent->attr.mtd_attr.param_access);
 199                         ent->attr.mtd_attr.param_access = NULL;
 200                 }
 201                 if (ent->attr.mtd_attr.param_weight) {
 202                         DEL_ARR_F(ent->attr.mtd_attr.param_weight);
 203                         ent->attr.mtd_attr.param_weight = NULL;
 204                 }
 205         }
 206 }
 207
 208 /**
 209  * Creates a deep copy of an entity.
 210  */
 211 static ir_entity *deep_entity_copy(ir_entity *old)
 212 {
 213         ir_entity *newe = XMALLOC(ir_entity);
 214
 215         *newe = *old;
 216         if (old->initializer != NULL) {
 217                 /* FIXME: the initializers are NOT copied */
 218         } else if (entity_has_compound_ent_values(old)) {
 219                 newe->attr.cmpd_attr.values    = NULL;
 220                 newe->attr.cmpd_attr.val_paths = NULL;
 221                 if (old->attr.cmpd_attr.values)
 222                         newe->attr.cmpd_attr.values = DUP_ARR_F(ir_node *, old->attr.cmpd_attr.values);
 223
 224                 /* FIXME: the compound graph paths are NOT copied */
 225                 if (old->attr.cmpd_attr.val_paths)
 226                         newe->attr.cmpd_attr.val_paths = DUP_ARR_F(compound_graph_path *, old->attr.cmpd_attr.val_paths);
 227         } else if (is_method_entity(old)) {
 228                 /* do NOT copy them, reanalyze. This might be the best solution */
 229                 newe->attr.mtd_attr.param_access = NULL;
 230                 newe->attr.mtd_attr.param_weight = NULL;
 231         }
 232         newe->overwrites    = NULL;
 233         newe->overwrittenby = NULL;
 234
 235 #ifdef DEBUG_libfirm
 236         newe->nr = get_irp_new_node_nr();
 237 #endif
 238         hook_new_entity(newe);
 239         return newe;
 240 }
 241
 242 ir_entity *copy_entity_own(ir_entity *old, ir_type *new_owner)
 243 {
 244         ir_entity *newe;
 245         assert(is_entity(old));
 246         assert(is_compound_type(new_owner));
 247         assert(get_type_state(new_owner) != layout_fixed);
 248
 249         if (old->owner == new_owner)
 250                 return old;
 251
 252         /* create a deep copy so we are safe of aliasing and double-freeing. */
 253         newe        = deep_entity_copy(old);
 254         newe->owner = new_owner;
 255         add_compound_member(new_owner, newe);
 256
 257         return newe;
 258 }
 259
 260 ir_entity *copy_entity_name(ir_entity *old, ident *new_name)
 261 {
 262         ir_entity *newe;
 263         assert(old && old->kind == k_entity);
 264
 265         if (old->name == new_name)
 266                 return old;
 267
 268         newe       = deep_entity_copy(old);
 269         newe->name = new_name;
 270         newe->ld_name = NULL;
 271         add_compound_member(old->owner, newe);
 272
 273         return newe;
 274 }
 275
 276 void free_entity(ir_entity *ent)
 277 {
 278         if (ent->owner != NULL && !is_Array_type(ent->owner))
 279                 remove_compound_member(ent->owner, ent);
 280
 281         assert(ent && ent->kind == k_entity);
 282         free_entity_attrs(ent);
 283 #ifdef DEBUG_libfirm
 284         ent->kind = k_BAD;
 285 #endif
 286         xfree(ent);
 287 }
 288
 289 long get_entity_nr(const ir_entity *ent)
 290 {
 291         assert(ent && ent->kind == k_entity);
 292 #ifdef DEBUG_libfirm
 293         return ent->nr;
 294 #else
 295         return (long)PTR_TO_INT(ent);
 296 #endif
 297 }
 298
 299 const char *(get_entity_name)(const ir_entity *ent)
 300 {
 301         return _get_entity_name(ent);
 302 }
 303
 304 ident *(get_entity_ident)(const ir_entity *ent)
 305 {
 306         return _get_entity_ident(ent);
 307 }
 308
 309 void (set_entity_ident)(ir_entity *ent, ident *id)
 310 {
 311         _set_entity_ident(ent, id);
 312 }
 313
 314 ir_type *(get_entity_owner)(const ir_entity *ent)
 315 {
 316         return _get_entity_owner(ent);
 317 }
 318
 319 void set_entity_owner(ir_entity *ent, ir_type *owner)
 320 {
 321         assert(is_entity(ent));
 322         assert(is_compound_type(owner));
 323
 324         remove_compound_member(ent->owner, ent);
 325         add_compound_member(owner, ent);
 326         ent->owner = owner;
 327 }
 328
 329 ident *(get_entity_ld_ident)(const ir_entity *ent)
 330 {
 331         return _get_entity_ld_ident(ent);
 332 }
 333
 334 void (set_entity_ld_ident)(ir_entity *ent, ident *ld_ident)
 335 {
 336         _set_entity_ld_ident(ent, ld_ident);
 337 }
 338
 339 const char *(get_entity_ld_name)(const ir_entity *ent)
 340 {
 341         return _get_entity_ld_name(ent);
 342 }
 343
 344 int entity_has_ld_ident(const ir_entity *entity)
 345 {
 346         return entity->ld_name != NULL;
 347 }
 348
 349 ir_type *(get_entity_type)(const ir_entity *ent)
 350 {
 351         return _get_entity_type(ent);
 352 }
 353
 354 void set_entity_type(ir_entity *ent, ir_type *type)
 355 {
 356         switch (ent->entity_kind) {
 357         case IR_ENTITY_METHOD:
 358                 assert(is_Method_type(type));
 359                 break;
 360         case IR_ENTITY_NORMAL:
 361                 assert(!is_Method_type(type));
 362                 break;
 363         case IR_ENTITY_LABEL:
 364                 assert(type == get_code_type());
 365                 break;
 366         case IR_ENTITY_COMPOUND_MEMBER:
 367                 break;
 368         }
 369         ent->type = type;
 370 }
 371
 372 ir_volatility (get_entity_volatility)(const ir_entity *ent)
 373 {
 374         return _get_entity_volatility(ent);
 375 }
 376
 377 void (set_entity_volatility)(ir_entity *ent, ir_volatility vol)
 378 {
 379         _set_entity_volatility(ent, vol);
 380 }
 381
 382 const char *get_volatility_name(ir_volatility var)
 383 {
 384 #define X(a)    case a: return #a
 385         switch (var) {
 386         X(volatility_non_volatile);
 387         X(volatility_is_volatile);
 388     default: return "BAD VALUE";
 389         }
 390 #undef X
 391 }
 392
 393 ir_align (get_entity_aligned)(const ir_entity *ent)
 394 {
 395         return _get_entity_aligned(ent);
 396 }
 397
 398 void (set_entity_aligned)(ir_entity *ent, ir_align a)
 399 {
 400         _set_entity_aligned(ent, a);
 401 }
 402
 403 unsigned (get_entity_alignment)(const ir_entity *ent)
 404 {
 405         return _get_entity_alignment(ent);
 406 }
 407
 408 void (set_entity_alignment)(ir_entity *ent, unsigned alignment)
 409 {
 410         _set_entity_alignment(ent, alignment);
 411 }
 412
 413 const char *get_align_name(ir_align a)
 414 {
 415 #define X(a)    case a: return #a
 416         switch (a) {
 417         X(align_non_aligned);
 418         X(align_is_aligned);
 419         default: return "BAD VALUE";
 420         }
 421 #undef X
 422 }
 423
 424 void set_entity_label(ir_entity *ent, ir_label_t label)
 425 {
 426         assert(ent->entity_kind == IR_ENTITY_LABEL);
 427         ent->attr.code_attr.label = label;
 428 }
 429
 430 ir_label_t get_entity_label(const ir_entity *ent)
 431 {
 432         assert(ent->entity_kind == IR_ENTITY_LABEL);
 433         return ent->attr.code_attr.label;
 434 }
 435
 436 static void verify_visibility(const ir_entity *entity)
 437 {
 438         if (get_entity_visibility(entity) == ir_visibility_external
 439                         && !is_method_entity(entity)) {
 440                 assert(!entity_has_definition(entity));
 441         }
 442 }
 443
 444 void set_entity_visibility(ir_entity *entity, ir_visibility visibility)
 445 {
 446         entity->visibility = visibility;
 447         verify_visibility(entity);
 448 }
 449
 450 ir_visibility get_entity_visibility(const ir_entity *entity)
 451 {
 452         return (ir_visibility)entity->visibility;
 453 }
 454
 455 void set_entity_linkage(ir_entity *entity, ir_linkage linkage)
 456 {
 457         entity->linkage = linkage;
 458 }
 459
 460 ir_linkage (get_entity_linkage)(const ir_entity *entity)
 461 {
 462         return get_entity_linkage(entity);
 463 }
 464
 465 void add_entity_linkage(ir_entity *entity, ir_linkage linkage)
 466 {
 467         entity->linkage |= linkage;
 468 }
 469
 470 void remove_entity_linkage(ir_entity *entity, ir_linkage linkage)
 471 {
 472         entity->linkage &= ~linkage;
 473 }
 474
 475 int (is_entity_compiler_generated)(const ir_entity *ent)
 476 {
 477         return _is_entity_compiler_generated(ent);
 478 }
 479
 480 void (set_entity_compiler_generated)(ir_entity *ent, int flag)
 481 {
 482         _set_entity_compiler_generated(ent, flag);
 483 }
 484
 485 ir_entity_usage (get_entity_usage)(const ir_entity *ent)
 486 {
 487         return _get_entity_usage(ent);
 488 }
 489
 490 void (set_entity_usage)(ir_entity *ent, ir_entity_usage flags)
 491 {
 492         _set_entity_usage(ent, flags);
 493 }
 494
 495 ir_node *get_atomic_ent_value(ir_entity *entity)
 496 {
 497         ir_initializer_t *initializer = get_entity_initializer(entity);
 498
 499         assert(entity && is_atomic_entity(entity));
 500         if (initializer == NULL) {
 501                 ir_type *type = get_entity_type(entity);
 502                 return new_r_Unknown(get_const_code_irg(), get_type_mode(type));
 503         }
 504
 505         switch (get_initializer_kind(initializer)) {
 506         case IR_INITIALIZER_NULL: {
 507                 ir_type *type = get_entity_type(entity);
 508                 ir_mode *mode = get_type_mode(type);
 509                 return new_r_Const(get_const_code_irg(), get_mode_null(mode));
 510         }
 511         case IR_INITIALIZER_TARVAL: {
 512                 ir_tarval *tv = get_initializer_tarval_value(initializer);
 513                 return new_r_Const(get_const_code_irg(), tv);
 514         }
 515         case IR_INITIALIZER_CONST:
 516                 return get_initializer_const_value(initializer);
 517         case IR_INITIALIZER_COMPOUND:
 518                 panic("compound initializer in atomic entity not allowed (%+F)", entity);
 519         }
 520
 521         panic("invalid initializer kind in get_atomic_ent_value(%+F)", entity);
 522 }
 523
 524 void set_atomic_ent_value(ir_entity *entity, ir_node *val)
 525 {
 526         ir_initializer_t *initializer;
 527
 528         assert(is_atomic_entity(entity));
 529
 530         assert(is_Dummy(val) || get_irn_mode(val) == get_type_mode(entity->type));
 531         initializer = create_initializer_const(val);
 532         entity->initializer = initializer;
 533 }
 534
 535 int is_irn_const_expression(ir_node *n)
 536 {
 537         /* we are in danger iff an exception will arise. TODO: be more precisely,
 538          * for instance Div. will NOT rise if divisor != 0
 539          */
 540         if (is_binop(n) && !is_fragile_op(n))
 541                 return is_irn_const_expression(get_binop_left(n)) && is_irn_const_expression(get_binop_right(n));
 542
 543         switch (get_irn_opcode(n)) {
 544         case iro_Const:
 545         case iro_SymConst:
 546         case iro_Unknown:
 547                 return 1;
 548         case iro_Conv:
 549         case iro_Cast:
 550                 return is_irn_const_expression(get_irn_n(n, 0));
 551         default:
 552                 break;
 553         }
 554         return 0;
 555 }
 556
 557 ir_node *copy_const_value(dbg_info *dbg, ir_node *n, ir_node *block)
 558 {
 559         ir_graph *irg = get_irn_irg(block);
 560         ir_node *nn;
 561         ir_mode *m;
 562
 563         /* @@@ GL I think  we should implement this using the routines from irgopt for
 564                dead node elimination/inlineing. */
 565
 566         m = get_irn_mode(n);
 567         switch (get_irn_opcode(n)) {
 568         case iro_Const:
 569                 nn = new_rd_Const(dbg, irg, get_Const_tarval(n));
 570                 break;
 571         case iro_SymConst:
 572                 nn = new_rd_SymConst(dbg, irg, get_irn_mode(n), get_SymConst_symbol(n), get_SymConst_kind(n));
 573                 break;
 574         case iro_Add:
 575                 nn = new_rd_Add(dbg, block,
 576                                 copy_const_value(dbg, get_Add_left(n), block),
 577                                 copy_const_value(dbg, get_Add_right(n), block), m);
 578                 break;
 579         case iro_Sub:
 580                 nn = new_rd_Sub(dbg, block,
 581                                 copy_const_value(dbg, get_Sub_left(n), block),
 582                                 copy_const_value(dbg, get_Sub_right(n), block), m);
 583                 break;
 584         case iro_Mul:
 585                 nn = new_rd_Mul(dbg, block,
 586                                 copy_const_value(dbg, get_Mul_left(n), block),
 587                                 copy_const_value(dbg, get_Mul_right(n), block), m);
 588                 break;
 589         case iro_And:
 590                 nn = new_rd_And(dbg, block,
 591                                 copy_const_value(dbg, get_And_left(n), block),
 592                                 copy_const_value(dbg, get_And_right(n), block), m);
 593                 break;
 594         case iro_Or:
 595                 nn = new_rd_Or(dbg, block,
 596                                copy_const_value(dbg, get_Or_left(n), block),
 597                                copy_const_value(dbg, get_Or_right(n), block), m);
 598                 break;
 599         case iro_Eor:
 600                 nn = new_rd_Eor(dbg, block,
 601                                 copy_const_value(dbg, get_Eor_left(n), block),
 602                                 copy_const_value(dbg, get_Eor_right(n), block), m);
 603                 break;
 604         case iro_Cast:
 605                 nn = new_rd_Cast(dbg, block,
 606                                  copy_const_value(dbg, get_Cast_op(n), block),
 607                                  get_Cast_type(n));
 608                 break;
 609         case iro_Conv:
 610                 nn = new_rd_Conv(dbg, block,
 611                                  copy_const_value(dbg, get_Conv_op(n), block), m);
 612                 break;
 613         case iro_Unknown:
 614                 nn = new_r_Unknown(irg, m); break;
 615         default:
 616                 panic("opcode invalid or not implemented");
 617         }
 618         return nn;
 619 }
 620
 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                 = (ir_initializer_t*)OALLOC(obst, 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(ir_tarval *tv)
 654 {
 655         struct obstack *obst = get_irg_obstack(get_const_code_irg());
 656
 657         ir_initializer_t *initializer
 658                 = (ir_initializer_t*)OALLOC(obst, 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(size_t 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 * sizeof(ir_initializer_t*)
 672                      - sizeof(ir_initializer_t*);
 673
 674         ir_initializer_t *initializer
 675                 = (ir_initializer_t*)obstack_alloc(obst, size);
 676         initializer->kind                    = IR_INITIALIZER_COMPOUND;
 677         initializer->compound.n_initializers = n_entries;
 678
 679         for (i = 0; i < n_entries; ++i) {
 680                 initializer->compound.initializers[i] = get_initializer_null();
 681         }
 682
 683         return initializer;
 684 }
 685
 686 ir_node *get_initializer_const_value(const ir_initializer_t *initializer)
 687 {
 688         assert(initializer->kind == IR_INITIALIZER_CONST);
 689         return skip_Id(initializer->consti.value);
 690 }
 691
 692 ir_tarval *get_initializer_tarval_value(const ir_initializer_t *initializer)
 693 {
 694         assert(initializer->kind == IR_INITIALIZER_TARVAL);
 695         return initializer->tarval.value;
 696 }
 697
 698 size_t get_initializer_compound_n_entries(const ir_initializer_t *initializer)
 699 {
 700         assert(initializer->kind == IR_INITIALIZER_COMPOUND);
 701         return initializer->compound.n_initializers;
 702 }
 703
 704 void set_initializer_compound_value(ir_initializer_t *initializer,
 705                                     size_t index, ir_initializer_t *value)
 706 {
 707         assert(initializer->kind == IR_INITIALIZER_COMPOUND);
 708         assert(index < initializer->compound.n_initializers);
 709
 710         initializer->compound.initializers[index] = value;
 711 }
 712
 713 ir_initializer_t *get_initializer_compound_value(
 714                 const ir_initializer_t *initializer, size_t index)
 715 {
 716         assert(initializer->kind == IR_INITIALIZER_COMPOUND);
 717         assert(index < initializer->compound.n_initializers);
 718
 719         return initializer->compound.initializers[index];
 720 }
 721
 722 ir_initializer_kind_t get_initializer_kind(const ir_initializer_t *initializer)
 723 {
 724         return initializer->kind;
 725 }
 726
 727 static void check_entity_initializer(ir_entity *entity)
 728 {
 729 #ifndef NDEBUG
 730         ir_initializer_t *initializer = entity->initializer;
 731         ir_type          *entity_tp   = get_entity_type(entity);
 732         switch (initializer->kind) {
 733         case IR_INITIALIZER_COMPOUND:
 734                 assert(is_compound_type(entity_tp) || is_Array_type(entity_tp));
 735                 break;
 736         case IR_INITIALIZER_CONST:
 737                 /* methods are initialized by a SymConst */
 738                 assert(is_atomic_type(entity_tp) || is_Method_type(entity_tp));
 739                 break;
 740         case IR_INITIALIZER_TARVAL:
 741                 assert(is_atomic_type(entity_tp));
 742                 break;
 743         case IR_INITIALIZER_NULL:
 744                 break;
 745         }
 746 #endif
 747 }
 748
 749 void set_entity_initializer(ir_entity *entity, ir_initializer_t *initializer)
 750 {
 751         entity->initializer = initializer;
 752         check_entity_initializer(entity);
 753 }
 754
 755 int has_entity_initializer(const ir_entity *entity)
 756 {
 757         return entity->initializer != NULL;
 758 }
 759
 760 ir_initializer_t *get_entity_initializer(const ir_entity *entity)
 761 {
 762         return entity->initializer;
 763 }
 764
 765 int (get_entity_offset)(const ir_entity *ent)
 766 {
 767         return _get_entity_offset(ent);
 768 }
 769
 770 void (set_entity_offset)(ir_entity *ent, int offset)
 771 {
 772         _set_entity_offset(ent, offset);
 773 }
 774
 775 unsigned char (get_entity_offset_bits_remainder)(const ir_entity *ent)
 776 {
 777         return _get_entity_offset_bits_remainder(ent);
 778 }
 779
 780 void (set_entity_offset_bits_remainder)(ir_entity *ent, unsigned char offset)
 781 {
 782         _set_entity_offset_bits_remainder(ent, offset);
 783 }
 784
 785 void add_entity_overwrites(ir_entity *ent, ir_entity *overwritten)
 786 {
 787         if (ent->overwrites == NULL) {
 788                 ent->overwrites = NEW_ARR_F(ir_entity*, 0);
 789         }
 790         ARR_APP1(ir_entity *, ent->overwrites, overwritten);
 791         if (overwritten->overwrittenby == NULL) {
 792                 overwritten->overwrittenby = NEW_ARR_F(ir_entity*, 0);
 793         }
 794         ARR_APP1(ir_entity *, overwritten->overwrittenby, ent);
 795 }
 796
 797 size_t get_entity_n_overwrites(const ir_entity *ent)
 798 {
 799         if (ent->overwrites == NULL)
 800                 return 0;
 801         return ARR_LEN(ent->overwrites);
 802 }
 803
 804 size_t get_entity_overwrites_index(const ir_entity *ent, ir_entity *overwritten)
 805 {
 806         size_t i;
 807         size_t n = get_entity_n_overwrites(ent);
 808         for (i = 0; i < n; ++i) {
 809                 if (get_entity_overwrites(ent, i) == overwritten)
 810                         return i;
 811         }
 812         return (size_t)-1;
 813 }
 814
 815 ir_entity *get_entity_overwrites(const ir_entity *ent, size_t pos)
 816 {
 817         assert(pos < get_entity_n_overwrites(ent));
 818         return ent->overwrites[pos];
 819 }
 820
 821 void set_entity_overwrites(ir_entity *ent, size_t pos, ir_entity *overwritten)
 822 {
 823         assert(pos < get_entity_n_overwrites(ent));
 824         ent->overwrites[pos] = overwritten;
 825 }
 826
 827 void remove_entity_overwrites(ir_entity *ent, ir_entity *overwritten)
 828 {
 829         size_t i;
 830         size_t n = get_entity_n_overwrites(ent);
 831         for (i = 0; i < n; ++i) {
 832                 if (ent->overwrites[i] == overwritten) {
 833                         for (; i < n - 1; i++)
 834                                 ent->overwrites[i] = ent->overwrites[i+1];
 835                         ARR_SETLEN(ir_entity*, ent->overwrites, n - 1);
 836                         break;
 837                 }
 838         }
 839 }
 840
 841
 842 size_t get_entity_n_overwrittenby(const ir_entity *ent)
 843 {
 844         if (ent->overwrittenby == NULL)
 845                 return 0;
 846         return ARR_LEN(ent->overwrittenby);
 847 }
 848
 849 size_t get_entity_overwrittenby_index(const ir_entity *ent,
 850                                       ir_entity *overwrites)
 851 {
 852         size_t i;
 853         size_t n = get_entity_n_overwrittenby(ent);
 854         for (i = 0; i < n; ++i) {
 855                 if (get_entity_overwrittenby(ent, i) == overwrites)
 856                         return i;
 857         }
 858         return (size_t)-1;
 859 }
 860
 861 ir_entity *get_entity_overwrittenby(const ir_entity *ent, size_t pos)
 862 {
 863         assert(pos < get_entity_n_overwrittenby(ent));
 864         return ent->overwrittenby[pos];
 865 }
 866
 867 void set_entity_overwrittenby(ir_entity *ent, size_t pos, ir_entity *overwrites)
 868 {
 869         assert(pos < get_entity_n_overwrittenby(ent));
 870         ent->overwrittenby[pos] = overwrites;
 871 }
 872
 873 void remove_entity_overwrittenby(ir_entity *ent, ir_entity *overwrites)
 874 {
 875         size_t i;
 876         size_t n = get_entity_n_overwrittenby(ent);
 877         for (i = 0; i < n; ++i) {
 878                 if (ent->overwrittenby[i] == overwrites) {
 879                         for (; i < n - 1; ++i)
 880                                 ent->overwrittenby[i] = ent->overwrittenby[i+1];
 881                         ARR_SETLEN(ir_entity*, ent->overwrittenby, n - 1);
 882                         break;
 883                 }
 884         }
 885 }
 886
 887 void *(get_entity_link)(const ir_entity *ent)
 888 {
 889         return _get_entity_link(ent);
 890 }
 891
 892 void (set_entity_link)(ir_entity *ent, void *l)
 893 {
 894         _set_entity_link(ent, l);
 895 }
 896
 897 ir_graph *(get_entity_irg)(const ir_entity *ent)
 898 {
 899         return _get_entity_irg(ent);
 900 }
 901
 902 void set_entity_irg(ir_entity *ent, ir_graph *irg)
 903 {
 904         assert(is_method_entity(ent));
 905         assert(get_entity_peculiarity(ent) == peculiarity_existent);
 906         ent->attr.mtd_attr.irg = irg;
 907 }
 908
 909 int (is_parameter_entity)(const ir_entity *entity)
 910 {
 911         return _is_parameter_entity(entity);
 912 }
 913
 914 size_t (get_entity_parameter_number)(const ir_entity *entity)
 915 {
 916         return _get_entity_parameter_number(entity);
 917 }
 918
 919 void set_entity_parameter_number(ir_entity *entity, size_t n)
 920 {
 921         assert(is_parameter_entity(entity));
 922         entity->attr.parameter.number = n;
 923 }
 924
 925 unsigned get_entity_vtable_number(const ir_entity *ent)
 926 {
 927         assert(is_method_entity((ir_entity *)ent));
 928         return ent->attr.mtd_attr.vtable_number;
 929 }
 930
 931 void set_entity_vtable_number(ir_entity *ent, unsigned vtable_number)
 932 {
 933         assert(is_method_entity(ent));
 934         ent->attr.mtd_attr.vtable_number = vtable_number;
 935 }
 936
 937 int is_unknown_entity(const ir_entity *entity)
 938 {
 939         return entity->entity_kind == IR_ENTITY_UNKNOWN;
 940 }
 941
 942 int (is_entity)(const void *thing)
 943 {
 944         return _is_entity(thing);
 945 }
 946
 947 int is_atomic_entity(const ir_entity *ent)
 948 {
 949         ir_type *t      = get_entity_type(ent);
 950         const tp_op *op = get_type_tpop(t);
 951         return (op == type_primitive || op == type_pointer ||
 952                 op == type_enumeration || op == type_method);
 953 }
 954
 955 int is_compound_entity(const ir_entity *ent)
 956 {
 957         ir_type     *t  = get_entity_type(ent);
 958         const tp_op *op = get_type_tpop(t);
 959         return (op == type_class || op == type_struct ||
 960                 op == type_array || op == type_union);
 961 }
 962
 963 int is_method_entity(const ir_entity *ent)
 964 {
 965         ir_type *t = get_entity_type(ent);
 966         return is_Method_type(t);
 967 }
 968
 969 ir_visited_t (get_entity_visited)(const ir_entity *ent)
 970 {
 971         return _get_entity_visited(ent);
 972 }
 973
 974 void (set_entity_visited)(ir_entity *ent, ir_visited_t num)
 975 {
 976         _set_entity_visited(ent, num);
 977 }
 978
 979 void (mark_entity_visited)(ir_entity *ent)
 980 {
 981         _mark_entity_visited(ent);
 982 }
 983
 984 int (entity_visited)(const ir_entity *ent)
 985 {
 986         return _entity_visited(ent);
 987 }
 988
 989 int (entity_not_visited)(const ir_entity *ent)
 990 {
 991         return _entity_not_visited(ent);
 992 }
 993
 994 mtp_additional_properties get_entity_additional_properties(const ir_entity *ent)
 995 {
 996         ir_graph *irg;
 997
 998         assert(is_method_entity(ent));
 999
1000         /* first check, if the graph has additional properties */
1001         irg = get_entity_irg(ent);
1002
1003         if (irg)
1004                 return get_irg_additional_properties(irg);
1005
1006         if (ent->attr.mtd_attr.irg_add_properties & mtp_property_inherited)
1007                 return get_method_additional_properties(get_entity_type(ent));
1008
1009         return ent->attr.mtd_attr.irg_add_properties;
1010 }
1011
1012 void set_entity_additional_properties(ir_entity *ent, mtp_additional_properties property_mask)
1013 {
1014         ir_graph *irg;
1015
1016         assert(is_method_entity(ent));
1017
1018         /* first check, if the graph exists */
1019         irg = get_entity_irg(ent);
1020         if (irg)
1021                 set_irg_additional_properties(irg, property_mask);
1022         else {
1023                 /* do not allow to set the mtp_property_inherited flag or
1024                  * the automatic inheritance of flags will not work */
1025                 ent->attr.mtd_attr.irg_add_properties = property_mask & ~mtp_property_inherited;
1026         }
1027 }
1028
1029 void add_entity_additional_properties(ir_entity *ent, mtp_additional_properties properties)
1030 {
1031         ir_graph *irg;
1032
1033         assert(is_method_entity(ent));
1034
1035         /* first check, if the graph exists */
1036         irg = get_entity_irg(ent);
1037         if (irg)
1038                 add_irg_additional_properties(irg, properties);
1039         else {
1040                 mtp_additional_properties mask = ent->attr.mtd_attr.irg_add_properties;
1041
1042                 if (mask & mtp_property_inherited)
1043                         mask = get_method_additional_properties(get_entity_type(ent));
1044
1045                 /* do not allow to set the mtp_property_inherited flag or
1046                  * the automatic inheritance of flags will not work */
1047                 ent->attr.mtd_attr.irg_add_properties = mask | (properties & ~mtp_property_inherited);
1048         }
1049 }
1050
1051 ir_type *(get_entity_repr_class)(const ir_entity *ent)
1052 {
1053         return _get_entity_repr_class(ent);
1054 }
1055
1056 dbg_info *(get_entity_dbg_info)(const ir_entity *ent)
1057 {
1058         return _get_entity_dbg_info(ent);
1059 }
1060
1061 void (set_entity_dbg_info)(ir_entity *ent, dbg_info *db)
1062 {
1063         _set_entity_dbg_info(ent, db);
1064 }
1065
1066 int entity_is_externally_visible(const ir_entity *entity)
1067 {
1068         return get_entity_visibility(entity) != ir_visibility_local
1069                 || (get_entity_linkage(entity) & IR_LINKAGE_HIDDEN_USER);
1070 }
1071
1072 int entity_has_definition(const ir_entity *entity)
1073 {
1074         return entity->initializer != NULL
1075                 || get_entity_irg(entity) != NULL
1076                 || entity_has_compound_ent_values(entity);
1077 }
1078
1079 void ir_init_entity(ir_prog *irp)
1080 {
1081         ident *id = new_id_from_str(UNKNOWN_ENTITY_NAME);
1082         irp->unknown_entity = intern_new_entity(NULL, IR_ENTITY_UNKNOWN, id,
1083                                                 irp->unknown_type, NULL);
1084         set_entity_visibility(irp->unknown_entity, ir_visibility_external);
1085         set_entity_ld_ident(irp->unknown_entity, id);
1086         hook_new_entity(irp->unknown_entity);
1087 }
1088
1089 void ir_finish_entity(ir_prog *irp)
1090 {
1091         free_entity(irp->unknown_entity);
1092 }
1093
1094 ir_allocation get_entity_allocation(const ir_entity *entity)
1095 {
1096         return (ir_allocation)entity->allocation;
1097 }
1098
1099 void set_entity_allocation(ir_entity *entity, ir_allocation allocation)
1100 {
1101         entity->allocation = allocation;
1102 }
1103
1104 ir_peculiarity get_entity_peculiarity(const ir_entity *entity)
1105 {
1106         return (ir_peculiarity)entity->peculiarity;
1107 }
1108
1109 void set_entity_peculiarity(ir_entity *entity, ir_peculiarity peculiarity)
1110 {
1111         entity->peculiarity = peculiarity;
1112 }
1113
1114 void set_entity_final(ir_entity *entity, int final)
1115 {
1116         entity->final = final;
1117 }
1118
1119 int is_entity_final(const ir_entity *entity)
1120 {
1121         return entity->final;
1122 }