nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "adt/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "entitymap_t.h"
  50 #include "driver/firm_opt.h"
  51 #include "driver/firm_cmdline.h"
  52
  53 static ir_type *ir_type_const_char;
  54 static ir_type *ir_type_wchar_t;
  55 static ir_type *ir_type_void;
  56 static ir_type *ir_type_int;
  57
  58 /* architecture specific floating point arithmetic mode (if any) */
  59 static ir_mode *mode_float_arithmetic;
  60
  61 static int        next_value_number_function;
  62 static ir_node   *continue_label;
  63 static ir_node   *break_label;
  64 static ir_node   *current_switch_cond;
  65 static bool       saw_default_label;
  66 static label_t  **all_labels;
  67 static entity_t **inner_functions;
  68 static ir_node   *ijmp_list;
  69 static bool       constant_folding;
  70
  71 extern bool       have_const_functions;
  72
  73 static const entity_t     *current_function_entity;
  74 static ir_node            *current_function_name;
  75 static ir_node            *current_funcsig;
  76 static switch_statement_t *current_switch;
  77 static ir_graph           *current_function;
  78 static translation_unit_t *current_translation_unit;
  79
  80 static entitymap_t  entitymap;
  81
  82 static struct obstack asm_obst;
  83
  84 typedef enum declaration_kind_t {
  85         DECLARATION_KIND_UNKNOWN,
  86         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  87         DECLARATION_KIND_GLOBAL_VARIABLE,
  88         DECLARATION_KIND_LOCAL_VARIABLE,
  89         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  90         DECLARATION_KIND_PARAMETER,
  91         DECLARATION_KIND_PARAMETER_ENTITY,
  92         DECLARATION_KIND_FUNCTION,
  93         DECLARATION_KIND_COMPOUND_MEMBER,
  94         DECLARATION_KIND_INNER_FUNCTION
  95 } declaration_kind_t;
  96
  97 static ir_mode *get_ir_mode_storage(type_t *type);
  98 /*
  99  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 100  * int that it returns bigger modes for floating point on some platforms
 101  * (x87 internally does arithemtic with 80bits)
 102  */
 103 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 104
 105 static ir_type *get_ir_type_incomplete(type_t *type);
 106
 107 static void enqueue_inner_function(entity_t *entity)
 108 {
 109         ARR_APP1(entity_t*, inner_functions, entity);
 110 }
 111
 112 static entity_t *next_inner_function(void)
 113 {
 114         int len = ARR_LEN(inner_functions);
 115         if (len == 0)
 116                 return NULL;
 117
 118         entity_t *entity = inner_functions[len-1];
 119         ARR_SHRINKLEN(inner_functions, len-1);
 120
 121         return entity;
 122 }
 123
 124 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 125 {
 126         const entity_t *entity = get_irg_loc_description(irg, pos);
 127
 128         if (entity != NULL) {
 129                 warningf(&entity->base.source_position,
 130                          "%s '%#T' might be used uninitialized",
 131                          get_entity_kind_name(entity->kind),
 132                          entity->declaration.type, entity->base.symbol);
 133         }
 134         return new_r_Unknown(irg, mode);
 135 }
 136
 137 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 138 {
 139         const source_position_t *pos = (const source_position_t*) dbg;
 140         if (pos == NULL)
 141                 return 0;
 142         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 143                                    pos->linenr);
 144 }
 145
 146 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 147 {
 148         const source_position_t *pos = (const source_position_t*) dbg;
 149         if (pos == NULL)
 150                 return NULL;
 151         if (line != NULL)
 152                 *line = pos->linenr;
 153         return pos->input_name;
 154 }
 155
 156 static dbg_info *get_dbg_info(const source_position_t *pos)
 157 {
 158         return (dbg_info*) pos;
 159 }
 160
 161 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 162
 163 static ir_mode *mode_int, *mode_uint;
 164
 165 static ir_node *_expression_to_firm(const expression_t *expression);
 166 static ir_node *expression_to_firm(const expression_t *expression);
 167 static void create_local_declaration(entity_t *entity);
 168
 169 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 170 {
 171         unsigned flags = get_atomic_type_flags(kind);
 172         unsigned size  = get_atomic_type_size(kind);
 173         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 174                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 175                 char            name[64];
 176                 ir_mode_sort    sort;
 177                 unsigned        bit_size     = size * 8;
 178                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 179                 unsigned        modulo_shift;
 180                 ir_mode_arithmetic arithmetic;
 181
 182                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 183                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 184                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 185                                  bit_size);
 186                         sort         = irms_int_number;
 187                         arithmetic   = irma_twos_complement;
 188                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 189                 } else {
 190                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 191                         snprintf(name, sizeof(name), "F%u", bit_size);
 192                         sort         = irms_float_number;
 193                         arithmetic   = irma_ieee754;
 194                         modulo_shift = 0;
 195                 }
 196                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 197                                    modulo_shift);
 198         }
 199
 200         return NULL;
 201 }
 202
 203 /**
 204  * Initialises the atomic modes depending on the machine size.
 205  */
 206 static void init_atomic_modes(void)
 207 {
 208         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 209                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 210         }
 211         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 212         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 213
 214         /* there's no real void type in firm */
 215         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 216
 217         /* initialize pointer modes */
 218         char            name[64];
 219         ir_mode_sort    sort         = irms_reference;
 220         unsigned        bit_size     = machine_size;
 221         bool            is_signed    = 0;
 222         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 223         unsigned        modulo_shift
 224                 = bit_size < machine_size ? machine_size : bit_size;
 225
 226         snprintf(name, sizeof(name), "p%u", machine_size);
 227         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 228                                         modulo_shift);
 229
 230         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 231         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 232
 233         /* Hmm, pointers should be machine size */
 234         set_modeP_data(ptr_mode);
 235         set_modeP_code(ptr_mode);
 236 }
 237
 238 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 239 {
 240         assert(kind <= ATOMIC_TYPE_LAST);
 241         return atomic_modes[kind];
 242 }
 243
 244 static ir_node *get_vla_size(array_type_t *const type)
 245 {
 246         ir_node *size_node = type->size_node;
 247         if (size_node == NULL) {
 248                 size_node = expression_to_firm(type->size_expression);
 249                 type->size_node = size_node;
 250         }
 251         return size_node;
 252 }
 253
 254 static ir_node *get_type_size(type_t *type)
 255 {
 256         type = skip_typeref(type);
 257
 258         if (is_type_array(type) && type->array.is_vla) {
 259                 ir_node *size_node = get_vla_size(&type->array);
 260                 ir_node *elem_size = get_type_size(type->array.element_type);
 261                 ir_mode *mode      = get_irn_mode(size_node);
 262                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 263                 return real_size;
 264         }
 265
 266         ir_mode *mode = get_ir_mode_storage(type_size_t);
 267         symconst_symbol sym;
 268         sym.type_p = get_ir_type(type);
 269         return new_SymConst(mode, sym, symconst_type_size);
 270 }
 271
 272 static unsigned count_parameters(const function_type_t *function_type)
 273 {
 274         unsigned count = 0;
 275
 276         function_parameter_t *parameter = function_type->parameters;
 277         for ( ; parameter != NULL; parameter = parameter->next) {
 278                 ++count;
 279         }
 280
 281         return count;
 282 }
 283
 284 static type_t *get_aligned_type(type_t *type, int alignment)
 285 {
 286         if (alignment == 0)
 287                 return type;
 288
 289         type = skip_typeref(type);
 290         if (alignment > type->base.alignment) {
 291                 type_t *copy         = duplicate_type(type);
 292                 copy->base.alignment = alignment;
 293                 type                 = identify_new_type(copy);
 294         }
 295         return type;
 296 }
 297
 298 /**
 299  * Creates a Firm type for an atomic type
 300  */
 301 static ir_type *create_atomic_type(atomic_type_kind_t akind, int alignment)
 302 {
 303         ir_mode            *mode   = atomic_modes[akind];
 304         ident              *id     = get_mode_ident(mode);
 305         ir_type            *irtype = new_type_primitive(id, mode);
 306
 307         set_type_alignment_bytes(irtype, alignment);
 308
 309         return irtype;
 310 }
 311
 312 /**
 313  * Creates a Firm type for a complex type
 314  */
 315 static ir_type *create_complex_type(const complex_type_t *type)
 316 {
 317         atomic_type_kind_t  kind = type->akind;
 318         ir_mode            *mode = atomic_modes[kind];
 319         ident              *id   = get_mode_ident(mode);
 320
 321         (void) id;
 322
 323         /* FIXME: finish the array */
 324         return NULL;
 325 }
 326
 327 /**
 328  * Creates a Firm type for an imaginary type
 329  */
 330 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 331 {
 332         atomic_type_kind_t  kind      = type->akind;
 333         ir_mode            *mode      = atomic_modes[kind];
 334         ident              *id        = get_mode_ident(mode);
 335         ir_type            *irtype    = new_type_primitive(id, mode);
 336
 337         set_type_alignment_bytes(irtype, type->base.alignment);
 338
 339         return irtype;
 340 }
 341
 342 /**
 343  * return type of a parameter (and take transparent union gnu extension into
 344  * account)
 345  */
 346 static type_t *get_parameter_type(type_t *type)
 347 {
 348         type = skip_typeref(type);
 349         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 350                 compound_t *compound = type->compound.compound;
 351                 type                 = compound->members.entities->declaration.type;
 352         }
 353
 354         return type;
 355 }
 356
 357 static ir_type *create_method_type(const function_type_t *function_type)
 358 {
 359         type_t  *return_type  = skip_typeref(function_type->return_type);
 360
 361         ident   *id           = id_unique("functiontype.%u");
 362         int      n_parameters = count_parameters(function_type);
 363         int      n_results    = return_type == type_void ? 0 : 1;
 364         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 365
 366         if (return_type != type_void) {
 367                 ir_type *restype = get_ir_type(return_type);
 368                 set_method_res_type(irtype, 0, restype);
 369         }
 370
 371         function_parameter_t *parameter = function_type->parameters;
 372         int                   n         = 0;
 373         for ( ; parameter != NULL; parameter = parameter->next) {
 374                 type_t  *type     = get_parameter_type(parameter->type);
 375                 ir_type *p_irtype = get_ir_type(type);
 376                 set_method_param_type(irtype, n, p_irtype);
 377                 ++n;
 378         }
 379
 380         if (function_type->variadic || function_type->unspecified_parameters) {
 381                 set_method_variadicity(irtype, variadicity_variadic);
 382         }
 383
 384         unsigned cc = get_method_calling_convention(irtype);
 385         switch (function_type->calling_convention) {
 386         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 387         case CC_CDECL:
 388 is_cdecl:
 389                 set_method_calling_convention(irtype, SET_CDECL(cc));
 390                 break;
 391
 392         case CC_STDCALL:
 393                 if (function_type->variadic || function_type->unspecified_parameters)
 394                         goto is_cdecl;
 395
 396                 /* only non-variadic function can use stdcall, else use cdecl */
 397                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 398                 break;
 399
 400         case CC_FASTCALL:
 401                 if (function_type->variadic || function_type->unspecified_parameters)
 402                         goto is_cdecl;
 403                 /* only non-variadic function can use fastcall, else use cdecl */
 404                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 405                 break;
 406
 407         case CC_THISCALL:
 408                 /* Hmm, leave default, not accepted by the parser yet. */
 409                 break;
 410         }
 411
 412         return irtype;
 413 }
 414
 415 static ir_type *create_pointer_type(pointer_type_t *type)
 416 {
 417         type_t   *points_to    = type->points_to;
 418         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 419         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 420                                                   ir_points_to, mode_P_data);
 421
 422         return ir_type;
 423 }
 424
 425 static ir_type *create_reference_type(reference_type_t *type)
 426 {
 427         type_t  *refers_to    = type->refers_to;
 428         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 429         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 430                                                  ir_refers_to, mode_P_data);
 431
 432         return ir_type;
 433 }
 434
 435 static ir_type *create_array_type(array_type_t *type)
 436 {
 437         type_t  *element_type    = type->element_type;
 438         ir_type *ir_element_type = get_ir_type(element_type);
 439
 440         ident    *id      = id_unique("array.%u");
 441         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 442
 443         const int align = get_type_alignment_bytes(ir_element_type);
 444         set_type_alignment_bytes(ir_type, align);
 445
 446         if (type->size_constant) {
 447                 int n_elements = type->size;
 448
 449                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 450
 451                 size_t elemsize = get_type_size_bytes(ir_element_type);
 452                 if (elemsize % align > 0) {
 453                         elemsize += align - (elemsize % align);
 454                 }
 455                 set_type_size_bytes(ir_type, n_elements * elemsize);
 456         } else {
 457                 set_array_lower_bound_int(ir_type, 0, 0);
 458         }
 459         set_type_state(ir_type, layout_fixed);
 460
 461         return ir_type;
 462 }
 463
 464 /**
 465  * Return the signed integer type of size bits.
 466  *
 467  * @param size   the size
 468  */
 469 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 470                                                  unsigned size)
 471 {
 472         static ir_mode *s_modes[64 + 1] = {NULL, };
 473         ir_type *res;
 474         ir_mode *mode;
 475
 476         if (size <= 0 || size > 64)
 477                 return NULL;
 478
 479         mode = s_modes[size];
 480         if (mode == NULL) {
 481                 char name[32];
 482
 483                 snprintf(name, sizeof(name), "bf_I%u", size);
 484                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 485                                    size <= 32 ? 32 : size );
 486                 s_modes[size] = mode;
 487         }
 488
 489         char name[32];
 490         snprintf(name, sizeof(name), "I%u", size);
 491         ident *id = new_id_from_str(name);
 492         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 493         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 494         set_primitive_base_type(res, base_tp);
 495
 496         return res;
 497 }
 498
 499 /**
 500  * Return the unsigned integer type of size bits.
 501  *
 502  * @param size   the size
 503  */
 504 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 505                                                    unsigned size)
 506 {
 507         static ir_mode *u_modes[64 + 1] = {NULL, };
 508         ir_type *res;
 509         ir_mode *mode;
 510
 511         if (size <= 0 || size > 64)
 512                 return NULL;
 513
 514         mode = u_modes[size];
 515         if (mode == NULL) {
 516                 char name[32];
 517
 518                 snprintf(name, sizeof(name), "bf_U%u", size);
 519                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 520                                    size <= 32 ? 32 : size );
 521                 u_modes[size] = mode;
 522         }
 523
 524         char name[32];
 525
 526         snprintf(name, sizeof(name), "U%u", size);
 527         ident *id = new_id_from_str(name);
 528         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 529         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 530         set_primitive_base_type(res, base_tp);
 531
 532         return res;
 533 }
 534
 535 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 536 {
 537         type_t *base = skip_typeref(type->base_type);
 538         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 539         ir_type *irbase = get_ir_type(base);
 540
 541         unsigned size = type->bit_size;
 542
 543         assert(!is_type_float(base));
 544         if (is_type_signed(base)) {
 545                 return get_signed_int_type_for_bit_size(irbase, size);
 546         } else {
 547                 return get_unsigned_int_type_for_bit_size(irbase, size);
 548         }
 549 }
 550
 551 #define INVALID_TYPE ((ir_type_ptr)-1)
 552
 553 enum {
 554         COMPOUND_IS_STRUCT = false,
 555         COMPOUND_IS_UNION  = true
 556 };
 557
 558 /**
 559  * Construct firm type from ast struct type.
 560  *
 561  * As anonymous inner structs get flattened to a single firm type, we might get
 562  * irtype, outer_offset and out_align passed (they represent the position of
 563  * the anonymous inner struct inside the resulting firm struct)
 564  */
 565 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 566                                      size_t *outer_offset, size_t *outer_align,
 567                                      bool incomplete, bool is_union)
 568 {
 569         compound_t *compound = type->compound;
 570
 571         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 572                 return compound->irtype;
 573         }
 574
 575         size_t align_all  = 1;
 576         size_t offset     = 0;
 577         size_t bit_offset = 0;
 578         size_t size       = 0;
 579
 580         if (irtype == NULL) {
 581                 symbol_t *symbol = compound->base.symbol;
 582                 ident    *id;
 583                 if (symbol != NULL) {
 584                         id = new_id_from_str(symbol->string);
 585                 } else {
 586                         if (is_union) {
 587                                 id = id_unique("__anonymous_union.%u");
 588                         } else {
 589                                 id = id_unique("__anonymous_struct.%u");
 590                         }
 591                 }
 592                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 593
 594                 if (is_union) {
 595                         irtype = new_d_type_union(id, dbgi);
 596                 } else {
 597                         irtype = new_d_type_struct(id, dbgi);
 598                 }
 599
 600                 compound->irtype_complete = false;
 601                 compound->irtype          = irtype;
 602         } else {
 603                 offset    = *outer_offset;
 604                 align_all = *outer_align;
 605         }
 606
 607         if (incomplete)
 608                 return irtype;
 609
 610         compound->irtype_complete = true;
 611
 612         entity_t *entry = compound->members.entities;
 613         for ( ; entry != NULL; entry = entry->base.next) {
 614                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 615                         continue;
 616
 617                 size_t prev_offset = offset;
 618
 619                 symbol_t *symbol     = entry->base.symbol;
 620                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 621                 entry_type
 622                         = get_aligned_type(entry_type, entry->compound_member.alignment);
 623                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 624
 625                 ident    *ident;
 626                 if (symbol != NULL) {
 627                         ident = new_id_from_str(symbol->string);
 628                 } else {
 629                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 630                                 create_compound_type(&entry_type->compound, irtype, &offset,
 631                                                      &align_all, false, COMPOUND_IS_STRUCT);
 632                                 goto finished_member;
 633                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 634                                 create_compound_type(&entry_type->compound, irtype, &offset,
 635                                                      &align_all, false, COMPOUND_IS_UNION);
 636                                 goto finished_member;
 637                         } else {
 638                                 assert(entry_type->kind == TYPE_BITFIELD);
 639                         }
 640                         ident = id_unique("anon.%u");
 641                 }
 642
 643                 ir_type *base_irtype;
 644                 if (entry_type->kind == TYPE_BITFIELD) {
 645                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 646                 } else {
 647                         base_irtype = get_ir_type(entry_type);
 648                 }
 649
 650                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 651                 size_t misalign        = offset % entry_alignment;
 652
 653                 ir_type   *entry_irtype = get_ir_type(entry_type);
 654                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 655
 656                 size_t base;
 657                 size_t bits_remainder;
 658                 if (entry_type->kind == TYPE_BITFIELD) {
 659                         size_t size_bits      = entry_type->bitfield.bit_size;
 660                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 661
 662                         if (size_bits > rest_size_bits) {
 663                                 /* start a new bucket */
 664                                 offset     += entry_alignment - misalign;
 665                                 bit_offset  = 0;
 666
 667                                 base           = offset;
 668                                 bits_remainder = 0;
 669                         } else {
 670                                 /* put into current bucket */
 671                                 base           = offset - misalign;
 672                                 bits_remainder = misalign * 8 + bit_offset;
 673                         }
 674
 675                         offset     += size_bits / 8;
 676                         bit_offset  = bit_offset + (size_bits % 8);
 677                 } else {
 678                         size_t entry_size = get_type_size_bytes(base_irtype);
 679                         if (misalign > 0 || bit_offset > 0)
 680                                 offset += entry_alignment - misalign;
 681
 682                         base           = offset;
 683                         bits_remainder = 0;
 684                         offset        += entry_size;
 685                         bit_offset     = 0;
 686                 }
 687
 688                 if (entry_alignment > align_all) {
 689                         if (entry_alignment % align_all != 0) {
 690                                 panic("uneven alignments not supported yet");
 691                         }
 692                         align_all = entry_alignment;
 693                 }
 694
 695                 set_entity_offset(entity, base);
 696                 set_entity_offset_bits_remainder(entity,
 697                                                  (unsigned char) bits_remainder);
 698                 //add_struct_member(irtype, entity);
 699                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 700                 assert(entry->compound_member.entity == NULL);
 701                 entry->compound_member.entity = entity;
 702
 703 finished_member:
 704                 if (is_union) {
 705                         size_t entry_size = offset - prev_offset;
 706                         if (entry_size > size) {
 707                                 size = entry_size;
 708                         }
 709                         offset     = 0;
 710                         bit_offset = 0;
 711                 }
 712         }
 713
 714         if (!is_union) {
 715                 size = offset;
 716         }
 717
 718         size_t misalign = offset % align_all;
 719         if (misalign > 0 || bit_offset > 0) {
 720                 size += align_all - misalign;
 721         }
 722
 723         if (outer_offset != NULL) {
 724                 if (!is_union) {
 725                         *outer_offset = offset;
 726                 } else {
 727                         *outer_offset += size;
 728                 }
 729
 730                 if (align_all > *outer_align) {
 731                         if (align_all % *outer_align != 0) {
 732                                 panic("uneven alignments not supported yet");
 733                         }
 734                         *outer_align = align_all;
 735                 }
 736         } else {
 737                 set_type_alignment_bytes(irtype, align_all);
 738                 set_type_size_bytes(irtype, size);
 739                 set_type_state(irtype, layout_fixed);
 740         }
 741
 742         return irtype;
 743 }
 744
 745 static ir_type *create_enum_type(enum_type_t *const type)
 746 {
 747         type->base.firm_type = ir_type_int;
 748
 749         ir_mode *const mode    = mode_int;
 750         tarval  *const one     = get_mode_one(mode);
 751         tarval  *      tv_next = get_tarval_null(mode);
 752
 753         bool constant_folding_old = constant_folding;
 754         constant_folding = true;
 755
 756         enum_t   *enume = type->enume;
 757         entity_t *entry = enume->base.next;
 758         for (; entry != NULL; entry = entry->base.next) {
 759                 if (entry->kind != ENTITY_ENUM_VALUE)
 760                         break;
 761
 762                 expression_t *const init = entry->enum_value.value;
 763                 if (init != NULL) {
 764                         ir_node *const cnst = expression_to_firm(init);
 765                         if (!is_Const(cnst)) {
 766                                 panic("couldn't fold constant");
 767                         }
 768                         tv_next = get_Const_tarval(cnst);
 769                 }
 770                 entry->enum_value.tv = tv_next;
 771                 tv_next = tarval_add(tv_next, one);
 772         }
 773
 774         constant_folding = constant_folding_old;
 775
 776         return create_atomic_type(type->akind, type->base.alignment);
 777 }
 778
 779 static ir_type *get_ir_type_incomplete(type_t *type)
 780 {
 781         assert(type != NULL);
 782         type = skip_typeref(type);
 783
 784         if (type->base.firm_type != NULL) {
 785                 assert(type->base.firm_type != INVALID_TYPE);
 786                 return type->base.firm_type;
 787         }
 788
 789         switch (type->kind) {
 790         case TYPE_COMPOUND_STRUCT:
 791                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 792                                             true, COMPOUND_IS_STRUCT);
 793         case TYPE_COMPOUND_UNION:
 794                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 795                                             true, COMPOUND_IS_UNION);
 796         default:
 797                 return get_ir_type(type);
 798         }
 799 }
 800
 801 ir_type *get_ir_type(type_t *type)
 802 {
 803         assert(type != NULL);
 804
 805         type = skip_typeref(type);
 806
 807         if (type->base.firm_type != NULL) {
 808                 assert(type->base.firm_type != INVALID_TYPE);
 809                 return type->base.firm_type;
 810         }
 811
 812         ir_type *firm_type = NULL;
 813         switch (type->kind) {
 814         case TYPE_ERROR:
 815                 /* Happens while constant folding, when there was an error */
 816                 return create_atomic_type(ATOMIC_TYPE_VOID, 0);
 817
 818         case TYPE_ATOMIC:
 819                 firm_type = create_atomic_type(type->atomic.akind,
 820                                                type->base.alignment);
 821                 break;
 822         case TYPE_COMPLEX:
 823                 firm_type = create_complex_type(&type->complex);
 824                 break;
 825         case TYPE_IMAGINARY:
 826                 firm_type = create_imaginary_type(&type->imaginary);
 827                 break;
 828         case TYPE_FUNCTION:
 829                 firm_type = create_method_type(&type->function);
 830                 break;
 831         case TYPE_POINTER:
 832                 firm_type = create_pointer_type(&type->pointer);
 833                 break;
 834         case TYPE_REFERENCE:
 835                 firm_type = create_reference_type(&type->reference);
 836                 break;
 837         case TYPE_ARRAY:
 838                 firm_type = create_array_type(&type->array);
 839                 break;
 840         case TYPE_COMPOUND_STRUCT:
 841                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 842                                                  false, COMPOUND_IS_STRUCT);
 843                 break;
 844         case TYPE_COMPOUND_UNION:
 845                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 846                                                  false, COMPOUND_IS_UNION);
 847                 break;
 848         case TYPE_ENUM:
 849                 firm_type = create_enum_type(&type->enumt);
 850                 break;
 851         case TYPE_BUILTIN:
 852                 firm_type = get_ir_type(type->builtin.real_type);
 853                 break;
 854         case TYPE_BITFIELD:
 855                 firm_type = create_bitfield_type(&type->bitfield);
 856                 break;
 857
 858         case TYPE_TYPEOF:
 859         case TYPE_TYPEDEF:
 860         case TYPE_INVALID:
 861                 break;
 862         }
 863         if (firm_type == NULL)
 864                 panic("unknown type found");
 865
 866         type->base.firm_type = firm_type;
 867         return firm_type;
 868 }
 869
 870 static ir_mode *get_ir_mode_storage(type_t *type)
 871 {
 872         ir_type *irtype = get_ir_type(type);
 873
 874         /* firm doesn't report a mode for arrays somehow... */
 875         if (is_Array_type(irtype)) {
 876                 return mode_P_data;
 877         }
 878
 879         ir_mode *mode = get_type_mode(irtype);
 880         assert(mode != NULL);
 881         return mode;
 882 }
 883
 884 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 885 {
 886         ir_mode *mode = get_ir_mode_storage(type);
 887         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 888                 return mode_float_arithmetic;
 889         }
 890
 891         return mode;
 892 }
 893
 894 /** Names of the runtime functions. */
 895 static const struct {
 896         int        id;           /**< the rts id */
 897         int        n_res;        /**< number of return values */
 898         const char *name;        /**< the name of the rts function */
 899         int        n_params;     /**< number of parameters */
 900         unsigned   flags;        /**< language flags */
 901 } rts_data[] = {
 902         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 903         { rts_abort,      0, "abort",        0, _C89 },
 904         { rts_alloca,     1, "alloca",       1, _ALL },
 905         { rts_abs,        1, "abs",          1, _C89 },
 906         { rts_labs,       1, "labs",         1, _C89 },
 907         { rts_llabs,      1, "llabs",        1, _C99 },
 908         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 909
 910         { rts_fabs,       1, "fabs",         1, _C89 },
 911         { rts_sqrt,       1, "sqrt",         1, _C89 },
 912         { rts_cbrt,       1, "cbrt",         1, _C99 },
 913         { rts_exp,        1, "exp",          1, _C89 },
 914         { rts_exp2,       1, "exp2",         1, _C89 },
 915         { rts_exp10,      1, "exp10",        1, _GNUC },
 916         { rts_log,        1, "log",          1, _C89 },
 917         { rts_log2,       1, "log2",         1, _C89 },
 918         { rts_log10,      1, "log10",        1, _C89 },
 919         { rts_pow,        1, "pow",          2, _C89 },
 920         { rts_sin,        1, "sin",          1, _C89 },
 921         { rts_cos,        1, "cos",          1, _C89 },
 922         { rts_tan,        1, "tan",          1, _C89 },
 923         { rts_asin,       1, "asin",         1, _C89 },
 924         { rts_acos,       1, "acos",         1, _C89 },
 925         { rts_atan,       1, "atan",         1, _C89 },
 926         { rts_sinh,       1, "sinh",         1, _C89 },
 927         { rts_cosh,       1, "cosh",         1, _C89 },
 928         { rts_tanh,       1, "tanh",         1, _C89 },
 929
 930         { rts_fabsf,      1, "fabsf",        1, _C99 },
 931         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 932         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 933         { rts_expf,       1, "expf",         1, _C99 },
 934         { rts_exp2f,      1, "exp2f",        1, _C99 },
 935         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 936         { rts_logf,       1, "logf",         1, _C99 },
 937         { rts_log2f,      1, "log2f",        1, _C99 },
 938         { rts_log10f,     1, "log10f",       1, _C99 },
 939         { rts_powf,       1, "powf",         2, _C99 },
 940         { rts_sinf,       1, "sinf",         1, _C99 },
 941         { rts_cosf,       1, "cosf",         1, _C99 },
 942         { rts_tanf,       1, "tanf",         1, _C99 },
 943         { rts_asinf,      1, "asinf",        1, _C99 },
 944         { rts_acosf,      1, "acosf",        1, _C99 },
 945         { rts_atanf,      1, "atanf",        1, _C99 },
 946         { rts_sinhf,      1, "sinhf",        1, _C99 },
 947         { rts_coshf,      1, "coshf",        1, _C99 },
 948         { rts_tanhf,      1, "tanhf",        1, _C99 },
 949
 950         { rts_fabsl,      1, "fabsl",        1, _C99 },
 951         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 952         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 953         { rts_expl,       1, "expl",         1, _C99 },
 954         { rts_exp2l,      1, "exp2l",        1, _C99 },
 955         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 956         { rts_logl,       1, "logl",         1, _C99 },
 957         { rts_log2l,      1, "log2l",        1, _C99 },
 958         { rts_log10l,     1, "log10l",       1, _C99 },
 959         { rts_powl,       1, "powl",         2, _C99 },
 960         { rts_sinl,       1, "sinl",         1, _C99 },
 961         { rts_cosl,       1, "cosl",         1, _C99 },
 962         { rts_tanl,       1, "tanl",         1, _C99 },
 963         { rts_asinl,      1, "asinl",        1, _C99 },
 964         { rts_acosl,      1, "acosl",        1, _C99 },
 965         { rts_atanl,      1, "atanl",        1, _C99 },
 966         { rts_sinhl,      1, "sinhl",        1, _C99 },
 967         { rts_coshl,      1, "coshl",        1, _C99 },
 968         { rts_tanhl,      1, "tanhl",        1, _C99 },
 969
 970         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 971         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 972         { rts_strcmp,     1, "strcmp",       2, _C89 },
 973         { rts_strncmp,    1, "strncmp",      3, _C89 }
 974 };
 975
 976 static ident *rts_idents[lengthof(rts_data)];
 977
 978 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 979
 980 /**
 981  * Handle GNU attributes for entities
 982  *
 983  * @param ent   the entity
 984  * @param decl  the routine declaration
 985  */
 986 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
 987 {
 988         assert(is_declaration(entity));
 989         decl_modifiers_t modifiers = entity->declaration.modifiers;
 990         if (modifiers & DM_PURE) {
 991                 /* TRUE if the declaration includes the GNU
 992                    __attribute__((pure)) specifier. */
 993                 set_entity_additional_property(irentity, mtp_property_pure);
 994         }
 995         if (modifiers & DM_CONST) {
 996                 set_entity_additional_property(irentity, mtp_property_const);
 997                 have_const_functions = true;
 998         }
 999         if (modifiers & DM_USED) {
1000                 /* TRUE if the declaration includes the GNU
1001                    __attribute__((used)) specifier. */
1002                 set_entity_stickyness(irentity, stickyness_sticky);
1003         }
1004 }
1005
1006 static bool is_main(entity_t *entity)
1007 {
1008         static symbol_t *sym_main = NULL;
1009         if (sym_main == NULL) {
1010                 sym_main = symbol_table_insert("main");
1011         }
1012
1013         if (entity->base.symbol != sym_main)
1014                 return false;
1015         /* must be in outermost scope */
1016         if (entity->base.parent_scope != &current_translation_unit->scope)
1017                 return false;
1018
1019         return true;
1020 }
1021
1022 /**
1023  * Creates an entity representing a function.
1024  *
1025  * @param declaration  the function declaration
1026  */
1027 static ir_entity *get_function_entity(entity_t *entity)
1028 {
1029         assert(entity->kind == ENTITY_FUNCTION);
1030         if (entity->function.entity != NULL) {
1031                 return entity->function.entity;
1032         }
1033
1034         if (is_main(entity)) {
1035                 /* force main to C linkage */
1036                 type_t *type = entity->declaration.type;
1037                 assert(is_type_function(type));
1038                 if (type->function.linkage != LINKAGE_C) {
1039                         type_t *new_type           = duplicate_type(type);
1040                         new_type->function.linkage = LINKAGE_C;
1041                         type                       = identify_new_type(new_type);
1042                         entity->declaration.type   = type;
1043                 }
1044         }
1045
1046         symbol_t *symbol = entity->base.symbol;
1047         ident    *id     = new_id_from_str(symbol->string);
1048
1049         ir_type   *global_type    = get_glob_type();
1050         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1051         bool const has_body       = entity->function.statement != NULL;
1052
1053         /* already an entity defined? */
1054         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1055         if (irentity != NULL) {
1056                 if (get_entity_visibility(irentity) == visibility_external_allocated
1057                                 && has_body) {
1058                         set_entity_visibility(irentity, visibility_external_visible);
1059                 }
1060                 goto entity_created;
1061         }
1062
1063         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1064         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1065         set_entity_ld_ident(irentity, create_ld_ident(entity));
1066
1067         handle_gnu_attributes_ent(irentity, entity);
1068
1069         /* static inline             => local
1070          * extern inline             => local
1071          * inline without definition => local
1072          * inline with definition    => external_visible */
1073         storage_class_tag_t const storage_class
1074                 = (storage_class_tag_t) entity->declaration.storage_class;
1075         bool                const is_inline     = entity->function.is_inline;
1076         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1077                 set_entity_visibility(irentity, visibility_external_visible);
1078         } else if (storage_class == STORAGE_CLASS_STATIC ||
1079                    (is_inline && has_body)) {
1080                 if (!has_body) {
1081                         /* this entity was declared, but is defined nowhere */
1082                         set_entity_peculiarity(irentity, peculiarity_description);
1083                 }
1084                 set_entity_visibility(irentity, visibility_local);
1085         } else if (has_body) {
1086                 set_entity_visibility(irentity, visibility_external_visible);
1087         } else {
1088                 set_entity_visibility(irentity, visibility_external_allocated);
1089         }
1090         set_entity_allocation(irentity, allocation_static);
1091
1092         /* We should check for file scope here, but as long as we compile C only
1093            this is not needed. */
1094         if (! firm_opt.freestanding) {
1095                 /* check for a known runtime function */
1096                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1097                         if (id != rts_idents[i])
1098                                 continue;
1099
1100                         /* ignore those rts functions not necessary needed for current mode */
1101                         if ((c_mode & rts_data[i].flags) == 0)
1102                                 continue;
1103                         assert(rts_entities[rts_data[i].id] == NULL);
1104                         rts_entities[rts_data[i].id] = irentity;
1105                 }
1106         }
1107
1108         entitymap_insert(&entitymap, symbol, irentity);
1109
1110 entity_created:
1111         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1112         entity->function.entity  = irentity;
1113
1114         return irentity;
1115 }
1116
1117 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1118 {
1119         ir_mode *value_mode = get_irn_mode(value);
1120
1121         if (value_mode == dest_mode || is_Bad(value))
1122                 return value;
1123
1124         if (dest_mode == mode_b) {
1125                 ir_node *zero = new_Const(get_mode_null(value_mode));
1126                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1127                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1128                 return proj;
1129         }
1130
1131         return new_d_Conv(dbgi, value, dest_mode);
1132 }
1133
1134 /**
1135  * Creates a Const node representing a constant.
1136  */
1137 static ir_node *const_to_firm(const const_expression_t *cnst)
1138 {
1139         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1140         type_t   *type = skip_typeref(cnst->base.type);
1141         ir_mode  *mode = get_ir_mode_storage(type);
1142
1143         char    buf[128];
1144         tarval *tv;
1145         size_t  len;
1146         if (mode_is_float(mode)) {
1147                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1148         } else {
1149                 if (mode_is_signed(mode)) {
1150                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1151                 } else {
1152                         len = snprintf(buf, sizeof(buf), "%llu",
1153                                        (unsigned long long) cnst->v.int_value);
1154                 }
1155                 tv = new_tarval_from_str(buf, len, mode);
1156         }
1157
1158         ir_node *res        = new_d_Const(dbgi, tv);
1159         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1160         return create_conv(dbgi, res, mode_arith);
1161 }
1162
1163 /**
1164  * Creates a Const node representing a character constant.
1165  */
1166 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1167 {
1168         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1169         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1170
1171         long long int v;
1172         size_t const  size = cnst->v.character.size;
1173         if (size == 1 && char_is_signed) {
1174                 v = (signed char)cnst->v.character.begin[0];
1175         } else {
1176                 v = 0;
1177                 for (size_t i = 0; i < size; ++i) {
1178                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1179                 }
1180         }
1181         char    buf[128];
1182         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1183         tarval *tv = new_tarval_from_str(buf, len, mode);
1184
1185         return new_d_Const(dbgi, tv);
1186 }
1187
1188 /**
1189  * Creates a Const node representing a wide character constant.
1190  */
1191 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1192 {
1193         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1194         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1195
1196         long long int v = cnst->v.wide_character.begin[0];
1197
1198         char    buf[128];
1199         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1200         tarval *tv = new_tarval_from_str(buf, len, mode);
1201
1202         return new_d_Const(dbgi, tv);
1203 }
1204
1205 /**
1206  * Creates a SymConst for a given entity.
1207  *
1208  * @param dbgi    debug info
1209  * @param mode    the (reference) mode for the SymConst
1210  * @param entity  the entity
1211  */
1212 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1213                               ir_entity *entity)
1214 {
1215         assert(entity != NULL);
1216         union symconst_symbol sym;
1217         sym.entity_p = entity;
1218         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1219 }
1220
1221 /**
1222  * Creates a SymConst node representing a string constant.
1223  *
1224  * @param src_pos    the source position of the string constant
1225  * @param id_prefix  a prefix for the name of the generated string constant
1226  * @param value      the value of the string constant
1227  */
1228 static ir_node *string_to_firm(const source_position_t *const src_pos,
1229                                const char *const id_prefix,
1230                                const string_t *const value)
1231 {
1232         ir_type  *const global_type = get_glob_type();
1233         dbg_info *const dbgi        = get_dbg_info(src_pos);
1234         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1235                                                        ir_type_const_char, dbgi);
1236
1237         ident     *const id     = id_unique(id_prefix);
1238         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1239         set_entity_ld_ident(entity, id);
1240         set_entity_variability(entity, variability_constant);
1241         set_entity_allocation(entity, allocation_static);
1242
1243         ir_type *const elem_type = ir_type_const_char;
1244         ir_mode *const mode      = get_type_mode(elem_type);
1245
1246         const char* const string = value->begin;
1247         const size_t      slen   = value->size;
1248
1249         set_array_lower_bound_int(type, 0, 0);
1250         set_array_upper_bound_int(type, 0, slen);
1251         set_type_size_bytes(type, slen);
1252         set_type_state(type, layout_fixed);
1253
1254         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1255         for (size_t i = 0; i < slen; ++i) {
1256                 tvs[i] = new_tarval_from_long(string[i], mode);
1257         }
1258
1259         set_array_entity_values(entity, tvs, slen);
1260         free(tvs);
1261
1262         return create_symconst(dbgi, mode_P_data, entity);
1263 }
1264
1265 /**
1266  * Creates a SymConst node representing a string literal.
1267  *
1268  * @param literal   the string literal
1269  */
1270 static ir_node *string_literal_to_firm(
1271                 const string_literal_expression_t* literal)
1272 {
1273         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1274                               &literal->value);
1275 }
1276
1277 /**
1278  * Creates a SymConst node representing a wide string literal.
1279  *
1280  * @param literal   the wide string literal
1281  */
1282 static ir_node *wide_string_literal_to_firm(
1283         const wide_string_literal_expression_t* const literal)
1284 {
1285         ir_type *const global_type = get_glob_type();
1286         ir_type *const elem_type   = ir_type_wchar_t;
1287         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1288         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1289                                                     elem_type, dbgi);
1290
1291         ident     *const id     = id_unique("Lstr.%u");
1292         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1293         set_entity_ld_ident(entity, id);
1294         set_entity_variability(entity, variability_constant);
1295         set_entity_allocation(entity, allocation_static);
1296
1297         ir_mode *const mode      = get_type_mode(elem_type);
1298
1299         const wchar_rep_t *const string = literal->value.begin;
1300         const size_t             slen   = literal->value.size;
1301
1302         set_array_lower_bound_int(type, 0, 0);
1303         set_array_upper_bound_int(type, 0, slen);
1304         set_type_size_bytes(type, slen);
1305         set_type_state(type, layout_fixed);
1306
1307         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1308         for (size_t i = 0; i < slen; ++i) {
1309                 tvs[i] = new_tarval_from_long(string[i], mode);
1310         }
1311
1312         set_array_entity_values(entity, tvs, slen);
1313         free(tvs);
1314
1315         return create_symconst(dbgi, mode_P_data, entity);
1316 }
1317
1318 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1319                                       ir_node *const addr)
1320 {
1321         ir_type *irtype = get_ir_type(type);
1322         if (is_compound_type(irtype)
1323                         || is_Method_type(irtype)
1324                         || is_Array_type(irtype)) {
1325                 return addr;
1326         }
1327
1328         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1329                                   ? cons_volatile : cons_none;
1330         ir_mode *const mode     = get_type_mode(irtype);
1331         ir_node *const memory   = get_store();
1332         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1333         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1334         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1335
1336         set_store(load_mem);
1337
1338         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1339         return create_conv(dbgi, load_res, mode_arithmetic);
1340 }
1341
1342 /**
1343  * Creates a strict Conv if necessary.
1344  */
1345 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1346 {
1347         ir_mode *mode = get_irn_mode(node);
1348
1349         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1350                 return node;
1351         if (!mode_is_float(mode))
1352                 return node;
1353
1354         /* check if there is already a Conv */
1355         if (is_Conv(node)) {
1356                 /* convert it into a strict Conv */
1357                 set_Conv_strict(node, 1);
1358                 return node;
1359         }
1360
1361         /* otherwise create a new one */
1362         return new_d_strictConv(dbgi, node, mode);
1363 }
1364
1365 static ir_node *get_global_var_address(dbg_info *const dbgi,
1366                                        const entity_t *const entity)
1367 {
1368         assert(entity->kind == ENTITY_VARIABLE);
1369         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1370
1371         ir_entity *const irentity = entity->variable.v.entity;
1372         if (entity->variable.thread_local) {
1373                 ir_node *const no_mem = new_NoMem();
1374                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1375                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1376         } else {
1377                 return create_symconst(dbgi, mode_P_data, irentity);
1378         }
1379 }
1380
1381 /**
1382  * Returns the correct base address depending on whether it is a parameter or a
1383  * normal local variable.
1384  */
1385 static ir_node *get_local_frame(ir_entity *const ent)
1386 {
1387         ir_graph      *const irg   = current_ir_graph;
1388         const ir_type *const owner = get_entity_owner(ent);
1389         if (owner == get_irg_frame_type(irg)) {
1390                 return get_irg_frame(irg);
1391         } else {
1392                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1393                 return get_irg_value_param_base(irg);
1394         }
1395 }
1396
1397 /**
1398  * Keep all memory edges of the given block.
1399  */
1400 static void keep_all_memory(ir_node *block)
1401 {
1402         ir_node *old = get_cur_block();
1403
1404         set_cur_block(block);
1405         keep_alive(get_store());
1406         /* TODO: keep all memory edges from restricted pointers */
1407         set_cur_block(old);
1408 }
1409
1410 static ir_node *reference_expression_enum_value_to_firm(
1411                 const reference_expression_t *ref)
1412 {
1413         entity_t *entity = ref->entity;
1414         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1415         /* make sure the type is constructed */
1416         (void) get_ir_type(type);
1417
1418         return new_Const(entity->enum_value.tv);
1419 }
1420
1421 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1422 {
1423         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1424         entity_t *entity = ref->entity;
1425         assert(is_declaration(entity));
1426         type_t   *type   = skip_typeref(entity->declaration.type);
1427
1428         /* make sure the type is constructed */
1429         (void) get_ir_type(type);
1430
1431         switch ((declaration_kind_t) entity->declaration.kind) {
1432         case DECLARATION_KIND_UNKNOWN:
1433                 break;
1434
1435         case DECLARATION_KIND_LOCAL_VARIABLE: {
1436                 ir_mode *const mode  = get_ir_mode_storage(type);
1437                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1438                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1439         }
1440         case DECLARATION_KIND_PARAMETER: {
1441                 ir_mode *const mode  = get_ir_mode_storage(type);
1442                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1443                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1444         }
1445         case DECLARATION_KIND_FUNCTION: {
1446                 ir_mode *const mode = get_ir_mode_storage(type);
1447                 return create_symconst(dbgi, mode, entity->function.entity);
1448         }
1449         case DECLARATION_KIND_INNER_FUNCTION: {
1450                 ir_mode *const mode = get_ir_mode_storage(type);
1451                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1452                         /* inner function not using the closure */
1453                         return create_symconst(dbgi, mode, entity->function.entity);
1454                 } else {
1455                         /* TODO: need trampoline here */
1456                         panic("Trampoline code not implemented");
1457                         return create_symconst(dbgi, mode, entity->function.entity);
1458                 }
1459         }
1460         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1461                 ir_node *const addr = get_global_var_address(dbgi, entity);
1462                 return deref_address(dbgi, entity->declaration.type, addr);
1463         }
1464
1465         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1466                 ir_entity *irentity = entity->variable.v.entity;
1467                 ir_node   *frame    = get_local_frame(irentity);
1468                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1469                 return deref_address(dbgi, entity->declaration.type, sel);
1470         }
1471         case DECLARATION_KIND_PARAMETER_ENTITY: {
1472                 ir_entity *irentity = entity->parameter.v.entity;
1473                 ir_node   *frame    = get_local_frame(irentity);
1474                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1475                 return deref_address(dbgi, entity->declaration.type, sel);
1476         }
1477
1478         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1479                 return entity->variable.v.vla_base;
1480
1481         case DECLARATION_KIND_COMPOUND_MEMBER:
1482                 panic("not implemented reference type");
1483         }
1484
1485         panic("reference to declaration with unknown type found");
1486 }
1487
1488 static ir_node *reference_addr(const reference_expression_t *ref)
1489 {
1490         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1491         entity_t *entity = ref->entity;
1492         assert(is_declaration(entity));
1493
1494         switch((declaration_kind_t) entity->declaration.kind) {
1495         case DECLARATION_KIND_UNKNOWN:
1496                 break;
1497         case DECLARATION_KIND_PARAMETER:
1498         case DECLARATION_KIND_LOCAL_VARIABLE:
1499                 /* you can store to a local variable (so we don't panic but return NULL
1500                  * as an indicator for no real address) */
1501                 return NULL;
1502         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1503                 ir_node *const addr = get_global_var_address(dbgi, entity);
1504                 return addr;
1505         }
1506         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1507                 ir_entity *irentity = entity->variable.v.entity;
1508                 ir_node   *frame    = get_local_frame(irentity);
1509                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1510
1511                 return sel;
1512         }
1513         case DECLARATION_KIND_PARAMETER_ENTITY: {
1514                 ir_entity *irentity = entity->parameter.v.entity;
1515                 ir_node   *frame    = get_local_frame(irentity);
1516                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1517
1518                 return sel;
1519         }
1520
1521         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1522                 return entity->variable.v.vla_base;
1523
1524         case DECLARATION_KIND_FUNCTION: {
1525                 type_t  *const type = skip_typeref(entity->declaration.type);
1526                 ir_mode *const mode = get_ir_mode_storage(type);
1527                 return create_symconst(dbgi, mode, entity->function.entity);
1528         }
1529
1530         case DECLARATION_KIND_INNER_FUNCTION:
1531         case DECLARATION_KIND_COMPOUND_MEMBER:
1532                 panic("not implemented reference type");
1533         }
1534
1535         panic("reference to declaration with unknown type found");
1536 }
1537
1538 /**
1539  * Generate an unary builtin.
1540  *
1541  * @param kind           the builtin kind to generate
1542  * @param op             the operand
1543  * @param function_type  the function type for the GNU builtin routine
1544  * @param db             debug info
1545  */
1546 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1547 {
1548         ir_node *in[1];
1549         in[0] = expression_to_firm(op);
1550
1551         ir_type *tp  = get_ir_type(function_type);
1552         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), kind, 1, in, tp);
1553         set_irn_pinned(irn, op_pin_state_floats);
1554         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1555 }
1556
1557 /**
1558  * Transform calls to builtin functions.
1559  */
1560 static ir_node *process_builtin_call(const call_expression_t *call)
1561 {
1562         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1563
1564         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1565         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1566
1567         type_t *type = skip_typeref(builtin->base.type);
1568         assert(is_type_pointer(type));
1569
1570         type_t   *function_type = skip_typeref(type->pointer.points_to);
1571         symbol_t *symbol        = builtin->symbol;
1572
1573         switch(symbol->ID) {
1574         case T___builtin_alloca: {
1575                 if (call->arguments == NULL || call->arguments->next != NULL) {
1576                         panic("invalid number of parameters on __builtin_alloca");
1577                 }
1578                 expression_t *argument = call->arguments->expression;
1579                 ir_node      *size     = expression_to_firm(argument);
1580
1581                 ir_node *store  = get_store();
1582                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1583                                               stack_alloc);
1584                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1585                 set_store(proj_m);
1586                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1587
1588                 return res;
1589         }
1590
1591         case T___builtin_huge_val:
1592         case T___builtin_inf:
1593         case T___builtin_inff:
1594         case T___builtin_infl: {
1595                 type_t  *type = function_type->function.return_type;
1596                 ir_mode *mode = get_ir_mode_arithmetic(type);
1597                 tarval  *tv   = get_mode_infinite(mode);
1598                 ir_node *res  = new_d_Const(dbgi, tv);
1599                 return   res;
1600         }
1601         case T___builtin_nan:
1602         case T___builtin_nanf:
1603         case T___builtin_nanl: {
1604                 /* Ignore string for now... */
1605                 assert(is_type_function(function_type));
1606                 type_t  *type = function_type->function.return_type;
1607                 ir_mode *mode = get_ir_mode_arithmetic(type);
1608                 tarval  *tv   = get_mode_NAN(mode);
1609                 ir_node *res  = new_d_Const(dbgi, tv);
1610                 return res;
1611         }
1612         case T___builtin_expect: {
1613                 expression_t *argument = call->arguments->expression;
1614                 return _expression_to_firm(argument);
1615         }
1616         case T___builtin_va_end:
1617                 /* evaluate the argument of va_end for its side effects */
1618                 _expression_to_firm(call->arguments->expression);
1619                 return NULL;
1620         case T___builtin_frame_address: {
1621                 expression_t *const expression = call->arguments->expression;
1622                 long val = fold_constant(expression);
1623                 if (val == 0) {
1624                         /* the nice case */
1625                         return get_irg_frame(current_ir_graph);
1626                 } else {
1627                         /* get the argument */
1628                         ir_node *in[2];
1629
1630                         in[0] = expression_to_firm(expression);
1631                         in[1] = get_irg_frame(current_ir_graph);
1632                         ir_type *tp  = get_ir_type(function_type);
1633                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_frame_addess, 2, in, tp);
1634                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1635                 }
1636         }
1637         case T___builtin_return_address: {
1638                 expression_t *const expression = call->arguments->expression;
1639                 ir_node *in[2];
1640
1641                 in[0] = expression_to_firm(expression);
1642                 in[1] = get_irg_frame(current_ir_graph);
1643                 ir_type *tp  = get_ir_type(function_type);
1644                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_return_address, 2, in, tp);
1645                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1646         }
1647         case T___builtin_ffs:
1648                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1649         case T___builtin_clz:
1650                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1651         case T___builtin_ctz:
1652                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1653         case T___builtin_popcount:
1654                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1655         case T___builtin_parity:
1656                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1657         case T___builtin_prefetch: {
1658                 call_argument_t *const args = call->arguments;
1659                 expression_t *const addr    = args->expression;
1660                 ir_node *in[3];
1661
1662                 in[0] = _expression_to_firm(addr);
1663                 if (args->next != NULL) {
1664                         expression_t *const rw = args->next->expression;
1665
1666                         in[1] = _expression_to_firm(rw);
1667
1668                         if (args->next->next != NULL) {
1669                                 expression_t *const locality = args->next->next->expression;
1670
1671                                 in[2] = expression_to_firm(locality);
1672                         } else {
1673                                 in[2] = new_Const_long(mode_int, 3);
1674                         }
1675                 } else {
1676                         in[1] = new_Const_long(mode_int, 0);
1677                         in[2] = new_Const_long(mode_int, 3);
1678                 }
1679                 ir_type *tp  = get_ir_type((type_t*) function_type);
1680                 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_prefetch, 3, in, tp);
1681                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1682                 return NULL;
1683         }
1684         default:
1685                 panic("unsupported builtin found");
1686         }
1687 }
1688
1689 /**
1690  * Transform a call expression.
1691  * Handles some special cases, like alloca() calls, which must be resolved
1692  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1693  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1694  * handled right...
1695  */
1696 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1697 {
1698         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1699         assert(get_cur_block() != NULL);
1700
1701         expression_t *function = call->function;
1702         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1703                 return process_builtin_call(call);
1704         }
1705         if (function->kind == EXPR_REFERENCE) {
1706                 const reference_expression_t *ref    = &function->reference;
1707                 entity_t                     *entity = ref->entity;
1708
1709                 if (entity->kind == ENTITY_FUNCTION
1710                                 && entity->function.entity == rts_entities[rts_alloca]) {
1711                         /* handle alloca() call */
1712                         expression_t *argument = call->arguments->expression;
1713                         ir_node      *size     = expression_to_firm(argument);
1714                         ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1715
1716                         size = create_conv(dbgi, size, mode);
1717
1718                         ir_node  *store  = get_store();
1719                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1720                                                        stack_alloc);
1721                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1722                         set_store(proj_m);
1723                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1724
1725                         return res;
1726                 }
1727         }
1728         ir_node *callee = expression_to_firm(function);
1729
1730         type_t *type = skip_typeref(function->base.type);
1731         assert(is_type_pointer(type));
1732         pointer_type_t *pointer_type = &type->pointer;
1733         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1734         assert(is_type_function(points_to));
1735         function_type_t *function_type = &points_to->function;
1736
1737         int      n_parameters = 0;
1738         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1739         ir_type *new_method_type = NULL;
1740         if (function_type->variadic || function_type->unspecified_parameters) {
1741                 const call_argument_t *argument = call->arguments;
1742                 for ( ; argument != NULL; argument = argument->next) {
1743                         ++n_parameters;
1744                 }
1745
1746                 /* we need to construct a new method type matching the call
1747                  * arguments... */
1748                 int n_res       = get_method_n_ress(ir_method_type);
1749                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1750                                                     n_parameters, n_res, dbgi);
1751                 set_method_calling_convention(new_method_type,
1752                                get_method_calling_convention(ir_method_type));
1753                 set_method_additional_properties(new_method_type,
1754                                get_method_additional_properties(ir_method_type));
1755                 set_method_variadicity(new_method_type,
1756                                        get_method_variadicity(ir_method_type));
1757
1758                 for (int i = 0; i < n_res; ++i) {
1759                         set_method_res_type(new_method_type, i,
1760                                             get_method_res_type(ir_method_type, i));
1761                 }
1762                 argument = call->arguments;
1763                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1764                         expression_t *expression = argument->expression;
1765                         ir_type      *irtype     = get_ir_type(expression->base.type);
1766                         set_method_param_type(new_method_type, i, irtype);
1767                 }
1768                 ir_method_type = new_method_type;
1769         } else {
1770                 n_parameters = get_method_n_params(ir_method_type);
1771         }
1772
1773         ir_node *in[n_parameters];
1774
1775         const call_argument_t *argument = call->arguments;
1776         for (int n = 0; n < n_parameters; ++n) {
1777                 expression_t *expression = argument->expression;
1778                 ir_node      *arg_node   = expression_to_firm(expression);
1779
1780                 type_t  *type = skip_typeref(expression->base.type);
1781                 if (!is_type_compound(type)) {
1782                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1783                         arg_node      = create_conv(dbgi, arg_node, mode);
1784                         arg_node      = do_strict_conv(dbgi, arg_node);
1785                 }
1786
1787                 in[n] = arg_node;
1788
1789                 argument = argument->next;
1790         }
1791
1792         ir_node  *store = get_store();
1793         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1794                                      ir_method_type);
1795         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1796         set_store(mem);
1797
1798         type_t  *return_type = skip_typeref(function_type->return_type);
1799         ir_node *result      = NULL;
1800
1801         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1802                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1803
1804                 if (is_type_scalar(return_type)) {
1805                         ir_mode *mode       = get_ir_mode_storage(return_type);
1806                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1807                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1808                         result              = create_conv(NULL, result, mode_arith);
1809                 } else {
1810                         ir_mode *mode = mode_P_data;
1811                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1812                 }
1813         }
1814
1815         if (function->kind == EXPR_REFERENCE &&
1816             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1817                 /* A dead end:  Keep the Call and the Block.  Also place all further
1818                  * nodes into a new and unreachable block. */
1819                 keep_alive(node);
1820                 keep_alive(get_cur_block());
1821                 new_Block(0, NULL);
1822         }
1823
1824         return result;
1825 }
1826
1827 static void statement_to_firm(statement_t *statement);
1828 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1829
1830 static ir_node *expression_to_addr(const expression_t *expression);
1831 static ir_node *create_condition_evaluation(const expression_t *expression,
1832                                             ir_node *true_block,
1833                                             ir_node *false_block);
1834
1835 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1836                          ir_node *value)
1837 {
1838         if (!is_type_compound(type)) {
1839                 ir_mode *mode = get_ir_mode_storage(type);
1840                 value         = create_conv(dbgi, value, mode);
1841                 value         = do_strict_conv(dbgi, value);
1842         }
1843
1844         ir_node *memory = get_store();
1845
1846         if (is_type_scalar(type)) {
1847                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1848                                       ? cons_volatile : cons_none;
1849                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1850                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1851                 set_store(store_mem);
1852         } else {
1853                 ir_type *irtype    = get_ir_type(type);
1854                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1855                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1856                 set_store(copyb_mem);
1857         }
1858 }
1859
1860 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1861 {
1862         tarval *all_one   = get_mode_all_one(mode);
1863         int     mode_size = get_mode_size_bits(mode);
1864
1865         assert(offset >= 0);
1866         assert(size   >= 0);
1867         assert(offset + size <= mode_size);
1868         if (size == mode_size) {
1869                 return all_one;
1870         }
1871
1872         long    shiftr    = get_mode_size_bits(mode) - size;
1873         long    shiftl    = offset;
1874         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1875         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1876         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1877         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1878
1879         return mask1;
1880 }
1881
1882 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1883                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1884 {
1885         ir_type *entity_type = get_entity_type(entity);
1886         ir_type *base_type   = get_primitive_base_type(entity_type);
1887         assert(base_type != NULL);
1888         ir_mode *mode        = get_type_mode(base_type);
1889
1890         value = create_conv(dbgi, value, mode);
1891
1892         /* kill upper bits of value and shift to right position */
1893         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1894         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1895
1896         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1897         ir_node *mask_node       = new_d_Const(dbgi, mask);
1898         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1899         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1900         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
1901         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1902
1903         /* load current value */
1904         ir_node  *mem             = get_store();
1905         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
1906                                         set_volatile ? cons_volatile : cons_none);
1907         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1908         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1909         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1910         tarval   *inv_mask        = tarval_not(shift_mask);
1911         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1912         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1913
1914         /* construct new value and store */
1915         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1916         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1917                                          set_volatile ? cons_volatile : cons_none);
1918         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1919         set_store(store_mem);
1920
1921         return value_masked;
1922 }
1923
1924 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1925                 ir_node *addr)
1926 {
1927         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1928         type_t   *type     = expression->base.type;
1929         ir_mode  *mode     = get_ir_mode_storage(type);
1930         ir_node  *mem      = get_store();
1931         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
1932         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1933         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1934
1935         load_res           = create_conv(dbgi, load_res, mode_int);
1936
1937         set_store(load_mem);
1938
1939         /* kill upper bits */
1940         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1941         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1942         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1943         ir_type   *entity_type  = get_entity_type(entity);
1944         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1945         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1946         assert(shift_bitsl >= 0);
1947         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1948         ir_node   *countl       = new_d_Const(dbgi, tvl);
1949         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1950
1951         long       shift_bitsr  = bitoffset + shift_bitsl;
1952         assert(shift_bitsr <= (long) machine_size);
1953         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1954         ir_node   *countr       = new_d_Const(dbgi, tvr);
1955         ir_node   *shiftr;
1956         if (mode_is_signed(mode)) {
1957                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1958         } else {
1959                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1960         }
1961
1962         return create_conv(dbgi, shiftr, mode);
1963 }
1964
1965 /* make sure the selected compound type is constructed */
1966 static void construct_select_compound(const select_expression_t *expression)
1967 {
1968         type_t *type = skip_typeref(expression->compound->base.type);
1969         if (is_type_pointer(type)) {
1970                 type = type->pointer.points_to;
1971         }
1972         (void) get_ir_type(type);
1973 }
1974
1975 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1976                                               ir_node *value, ir_node *addr)
1977 {
1978         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1979         type_t   *type = skip_typeref(expression->base.type);
1980
1981         if (!is_type_compound(type)) {
1982                 ir_mode  *mode = get_ir_mode_storage(type);
1983                 value          = create_conv(dbgi, value, mode);
1984                 value          = do_strict_conv(dbgi, value);
1985         }
1986
1987         if (expression->kind == EXPR_REFERENCE) {
1988                 const reference_expression_t *ref = &expression->reference;
1989
1990                 entity_t *entity = ref->entity;
1991                 assert(is_declaration(entity));
1992                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1993                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1994                         set_value(entity->variable.v.value_number, value);
1995                         return value;
1996                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1997                         set_value(entity->parameter.v.value_number, value);
1998                         return value;
1999                 }
2000         }
2001
2002         if (addr == NULL)
2003                 addr = expression_to_addr(expression);
2004         assert(addr != NULL);
2005
2006         if (expression->kind == EXPR_SELECT) {
2007                 const select_expression_t *select = &expression->select;
2008
2009                 construct_select_compound(select);
2010
2011                 entity_t *entity = select->compound_entry;
2012                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2013                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2014                         ir_entity *irentity = entity->compound_member.entity;
2015                         bool       set_volatile
2016                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2017                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2018                                                        set_volatile);
2019                         return value;
2020                 }
2021         }
2022
2023         assign_value(dbgi, addr, type, value);
2024         return value;
2025 }
2026
2027 static void set_value_for_expression(const expression_t *expression,
2028                                      ir_node *value)
2029 {
2030         set_value_for_expression_addr(expression, value, NULL);
2031 }
2032
2033 static ir_node *get_value_from_lvalue(const expression_t *expression,
2034                                       ir_node *addr)
2035 {
2036         if (expression->kind == EXPR_REFERENCE) {
2037                 const reference_expression_t *ref = &expression->reference;
2038
2039                 entity_t *entity = ref->entity;
2040                 assert(entity->kind == ENTITY_VARIABLE
2041                                 || entity->kind == ENTITY_PARAMETER);
2042                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2043                 int value_number;
2044                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2045                         value_number = entity->variable.v.value_number;
2046                         assert(addr == NULL);
2047                         type_t  *type = skip_typeref(expression->base.type);
2048                         ir_mode *mode = get_ir_mode_storage(type);
2049                         ir_node *res  = get_value(value_number, mode);
2050                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2051                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2052                         value_number = entity->parameter.v.value_number;
2053                         assert(addr == NULL);
2054                         type_t  *type = skip_typeref(expression->base.type);
2055                         ir_mode *mode = get_ir_mode_storage(type);
2056                         ir_node *res  = get_value(value_number, mode);
2057                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2058                 }
2059         }
2060
2061         assert(addr != NULL);
2062         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2063
2064         ir_node *value;
2065         if (expression->kind == EXPR_SELECT &&
2066             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2067             construct_select_compound(&expression->select);
2068                 value = bitfield_extract_to_firm(&expression->select, addr);
2069         } else {
2070                 value = deref_address(dbgi, expression->base.type, addr);
2071         }
2072
2073         return value;
2074 }
2075
2076
2077 static ir_node *create_incdec(const unary_expression_t *expression)
2078 {
2079         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2080         const expression_t *value_expr = expression->value;
2081         ir_node            *addr       = expression_to_addr(value_expr);
2082         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2083
2084         type_t  *type = skip_typeref(expression->base.type);
2085         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2086
2087         ir_node *offset;
2088         if (is_type_pointer(type)) {
2089                 pointer_type_t *pointer_type = &type->pointer;
2090                 offset                       = get_type_size(pointer_type->points_to);
2091         } else {
2092                 assert(is_type_arithmetic(type));
2093                 offset = new_Const(get_mode_one(mode));
2094         }
2095
2096         ir_node *result;
2097         ir_node *store_value;
2098         switch(expression->base.kind) {
2099         case EXPR_UNARY_POSTFIX_INCREMENT:
2100                 result      = value;
2101                 store_value = new_d_Add(dbgi, value, offset, mode);
2102                 break;
2103         case EXPR_UNARY_POSTFIX_DECREMENT:
2104                 result      = value;
2105                 store_value = new_d_Sub(dbgi, value, offset, mode);
2106                 break;
2107         case EXPR_UNARY_PREFIX_INCREMENT:
2108                 result      = new_d_Add(dbgi, value, offset, mode);
2109                 store_value = result;
2110                 break;
2111         case EXPR_UNARY_PREFIX_DECREMENT:
2112                 result      = new_d_Sub(dbgi, value, offset, mode);
2113                 store_value = result;
2114                 break;
2115         default:
2116                 panic("no incdec expr in create_incdec");
2117         }
2118
2119         set_value_for_expression_addr(value_expr, store_value, addr);
2120
2121         return result;
2122 }
2123
2124 static bool is_local_variable(expression_t *expression)
2125 {
2126         if (expression->kind != EXPR_REFERENCE)
2127                 return false;
2128         reference_expression_t *ref_expr = &expression->reference;
2129         entity_t               *entity   = ref_expr->entity;
2130         if (entity->kind != ENTITY_VARIABLE)
2131                 return false;
2132         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2133         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2134 }
2135
2136 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2137 {
2138         switch(kind) {
2139         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2140         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2141         case EXPR_BINARY_NOTEQUAL:
2142                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2143         case EXPR_BINARY_ISLESS:
2144         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2145         case EXPR_BINARY_ISLESSEQUAL:
2146         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2147         case EXPR_BINARY_ISGREATER:
2148         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2149         case EXPR_BINARY_ISGREATEREQUAL:
2150         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2151         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2152
2153         default:
2154                 break;
2155         }
2156         panic("trying to get pn_Cmp from non-comparison binexpr type");
2157 }
2158
2159 /**
2160  * Handle the assume optimizer hint: check if a Confirm
2161  * node can be created.
2162  *
2163  * @param dbi    debug info
2164  * @param expr   the IL assume expression
2165  *
2166  * we support here only some simple cases:
2167  *  - var rel const
2168  *  - const rel val
2169  *  - var rel var
2170  */
2171 static ir_node *handle_assume_compare(dbg_info *dbi,
2172                                       const binary_expression_t *expression)
2173 {
2174         expression_t *op1 = expression->left;
2175         expression_t *op2 = expression->right;
2176         entity_t     *var2, *var = NULL;
2177         ir_node      *res = NULL;
2178         pn_Cmp        cmp_val;
2179
2180         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2181
2182         if (is_local_variable(op1) && is_local_variable(op2)) {
2183         var  = op1->reference.entity;
2184             var2 = op2->reference.entity;
2185
2186                 type_t  *const type = skip_typeref(var->declaration.type);
2187                 ir_mode *const mode = get_ir_mode_storage(type);
2188
2189                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2190                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2191
2192                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2193                 set_value(var2->variable.v.value_number, res);
2194
2195                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2196                 set_value(var->variable.v.value_number, res);
2197
2198                 return res;
2199         }
2200
2201         expression_t *con;
2202         if (is_local_variable(op1) && is_constant_expression(op2)) {
2203                 var = op1->reference.entity;
2204                 con = op2;
2205         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2206                 cmp_val = get_inversed_pnc(cmp_val);
2207                 var = op2->reference.entity;
2208                 con = op1;
2209         }
2210
2211         if (var != NULL) {
2212                 type_t  *const type = skip_typeref(var->declaration.type);
2213                 ir_mode *const mode = get_ir_mode_storage(type);
2214
2215                 res = get_value(var->variable.v.value_number, mode);
2216                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2217                 set_value(var->variable.v.value_number, res);
2218         }
2219         return res;
2220 }
2221
2222 /**
2223  * Handle the assume optimizer hint.
2224  *
2225  * @param dbi    debug info
2226  * @param expr   the IL assume expression
2227  */
2228 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2229 {
2230         switch(expression->kind) {
2231         case EXPR_BINARY_EQUAL:
2232         case EXPR_BINARY_NOTEQUAL:
2233         case EXPR_BINARY_LESS:
2234         case EXPR_BINARY_LESSEQUAL:
2235         case EXPR_BINARY_GREATER:
2236         case EXPR_BINARY_GREATEREQUAL:
2237                 return handle_assume_compare(dbi, &expression->binary);
2238         default:
2239                 return NULL;
2240         }
2241 }
2242
2243 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2244 {
2245         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2246         type_t   *type = skip_typeref(expression->base.type);
2247
2248         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2249                 return expression_to_addr(expression->value);
2250
2251         const expression_t *value = expression->value;
2252
2253         switch(expression->base.kind) {
2254         case EXPR_UNARY_NEGATE: {
2255                 ir_node *value_node = expression_to_firm(value);
2256                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2257                 return new_d_Minus(dbgi, value_node, mode);
2258         }
2259         case EXPR_UNARY_PLUS:
2260                 return expression_to_firm(value);
2261         case EXPR_UNARY_BITWISE_NEGATE: {
2262                 ir_node *value_node = expression_to_firm(value);
2263                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2264                 return new_d_Not(dbgi, value_node, mode);
2265         }
2266         case EXPR_UNARY_NOT: {
2267                 ir_node *value_node = _expression_to_firm(value);
2268                 value_node          = create_conv(dbgi, value_node, mode_b);
2269                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2270                 return res;
2271         }
2272         case EXPR_UNARY_DEREFERENCE: {
2273                 ir_node *value_node = expression_to_firm(value);
2274                 type_t  *value_type = skip_typeref(value->base.type);
2275                 assert(is_type_pointer(value_type));
2276                 type_t  *points_to  = value_type->pointer.points_to;
2277                 return deref_address(dbgi, points_to, value_node);
2278         }
2279         case EXPR_UNARY_POSTFIX_INCREMENT:
2280         case EXPR_UNARY_POSTFIX_DECREMENT:
2281         case EXPR_UNARY_PREFIX_INCREMENT:
2282         case EXPR_UNARY_PREFIX_DECREMENT:
2283                 return create_incdec(expression);
2284         case EXPR_UNARY_CAST: {
2285                 ir_node *value_node = expression_to_firm(value);
2286                 if (is_type_scalar(type)) {
2287                         ir_mode *mode       = get_ir_mode_storage(type);
2288                         ir_node *node       = create_conv(dbgi, value_node, mode);
2289                         node                = do_strict_conv(dbgi, node);
2290                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2291                         node                = create_conv(dbgi, node, mode_arith);
2292                         return node;
2293                 } else {
2294                         /* make sure firm type is constructed */
2295                         (void) get_ir_type(type);
2296                         return value_node;
2297                 }
2298         }
2299         case EXPR_UNARY_CAST_IMPLICIT: {
2300                 ir_node *value_node = expression_to_firm(value);
2301                 if (is_type_scalar(type)) {
2302                         ir_mode *mode       = get_ir_mode_storage(type);
2303                         ir_node *res        = create_conv(dbgi, value_node, mode);
2304                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2305                         res                 = create_conv(dbgi, res, mode_arith);
2306                         return res;
2307                 } else {
2308                         return value_node;
2309                 }
2310         }
2311         case EXPR_UNARY_ASSUME:
2312                 if (firm_opt.confirm)
2313                         return handle_assume(dbgi, value);
2314                 else
2315                         return NULL;
2316
2317         default:
2318                 break;
2319         }
2320         panic("invalid UNEXPR type found");
2321 }
2322
2323 /**
2324  * produces a 0/1 depending of the value of a mode_b node
2325  */
2326 static ir_node *produce_condition_result(const expression_t *expression,
2327                                          ir_mode *mode, dbg_info *dbgi)
2328 {
2329         ir_node *cur_block = get_cur_block();
2330
2331         ir_node *one_block = new_immBlock();
2332         set_cur_block(one_block);
2333         ir_node *one       = new_Const(get_mode_one(mode));
2334         ir_node *jmp_one   = new_d_Jmp(dbgi);
2335
2336         ir_node *zero_block = new_immBlock();
2337         set_cur_block(zero_block);
2338         ir_node *zero       = new_Const(get_mode_null(mode));
2339         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2340
2341         set_cur_block(cur_block);
2342         create_condition_evaluation(expression, one_block, zero_block);
2343         mature_immBlock(one_block);
2344         mature_immBlock(zero_block);
2345
2346         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2347         new_Block(2, in_cf);
2348
2349         ir_node *in[2] = { one, zero };
2350         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2351
2352         return val;
2353 }
2354
2355 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2356                 ir_node *value, type_t *type)
2357 {
2358         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2359         assert(is_type_pointer(type));
2360         pointer_type_t *const pointer_type = &type->pointer;
2361         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2362         ir_node        *      elem_size    = get_type_size(points_to);
2363         elem_size                          = create_conv(dbgi, elem_size, mode);
2364         value                              = create_conv(dbgi, value,     mode);
2365         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2366         return mul;
2367 }
2368
2369 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2370                           ir_node *left, ir_node *right)
2371 {
2372         ir_mode  *mode;
2373         type_t   *type_left  = skip_typeref(expression->left->base.type);
2374         type_t   *type_right = skip_typeref(expression->right->base.type);
2375
2376         expression_kind_t kind = expression->base.kind;
2377
2378         switch (kind) {
2379         case EXPR_BINARY_SHIFTLEFT:
2380         case EXPR_BINARY_SHIFTRIGHT:
2381         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2382         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2383                 mode  = get_irn_mode(left);
2384                 right = create_conv(dbgi, right, mode_uint);
2385                 break;
2386
2387         case EXPR_BINARY_SUB:
2388                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2389                         const pointer_type_t *const ptr_type = &type_left->pointer;
2390
2391                         mode = get_ir_mode_arithmetic(expression->base.type);
2392                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2393                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2394                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2395                         ir_node *const no_mem    = new_NoMem();
2396                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2397                                                                                                    mode, op_pin_state_floats);
2398                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2399                 }
2400                 /* fallthrough */
2401         case EXPR_BINARY_SUB_ASSIGN:
2402                 if (is_type_pointer(type_left)) {
2403                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2404                         mode  = get_ir_mode_arithmetic(type_left);
2405                         break;
2406                 }
2407                 goto normal_node;
2408
2409         case EXPR_BINARY_ADD:
2410         case EXPR_BINARY_ADD_ASSIGN:
2411                 if (is_type_pointer(type_left)) {
2412                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2413                         mode  = get_ir_mode_arithmetic(type_left);
2414                         break;
2415                 } else if (is_type_pointer(type_right)) {
2416                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2417                         mode  = get_ir_mode_arithmetic(type_right);
2418                         break;
2419                 }
2420                 goto normal_node;
2421
2422         default:
2423 normal_node:
2424                 mode = get_ir_mode_arithmetic(type_right);
2425                 left = create_conv(dbgi, left, mode);
2426                 break;
2427         }
2428
2429         switch (kind) {
2430         case EXPR_BINARY_ADD_ASSIGN:
2431         case EXPR_BINARY_ADD:
2432                 return new_d_Add(dbgi, left, right, mode);
2433         case EXPR_BINARY_SUB_ASSIGN:
2434         case EXPR_BINARY_SUB:
2435                 return new_d_Sub(dbgi, left, right, mode);
2436         case EXPR_BINARY_MUL_ASSIGN:
2437         case EXPR_BINARY_MUL:
2438                 return new_d_Mul(dbgi, left, right, mode);
2439         case EXPR_BINARY_BITWISE_AND:
2440         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2441                 return new_d_And(dbgi, left, right, mode);
2442         case EXPR_BINARY_BITWISE_OR:
2443         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2444                 return new_d_Or(dbgi, left, right, mode);
2445         case EXPR_BINARY_BITWISE_XOR:
2446         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2447                 return new_d_Eor(dbgi, left, right, mode);
2448         case EXPR_BINARY_SHIFTLEFT:
2449         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2450                 return new_d_Shl(dbgi, left, right, mode);
2451         case EXPR_BINARY_SHIFTRIGHT:
2452         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2453                 if (mode_is_signed(mode)) {
2454                         return new_d_Shrs(dbgi, left, right, mode);
2455                 } else {
2456                         return new_d_Shr(dbgi, left, right, mode);
2457                 }
2458         case EXPR_BINARY_DIV:
2459         case EXPR_BINARY_DIV_ASSIGN: {
2460                 ir_node *pin = new_Pin(new_NoMem());
2461                 ir_node *op;
2462                 ir_node *res;
2463                 if (mode_is_float(mode)) {
2464                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2465                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2466                 } else {
2467                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2468                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2469                 }
2470                 return res;
2471         }
2472         case EXPR_BINARY_MOD:
2473         case EXPR_BINARY_MOD_ASSIGN: {
2474                 ir_node *pin = new_Pin(new_NoMem());
2475                 assert(!mode_is_float(mode));
2476                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2477                                          op_pin_state_floats);
2478                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2479                 return res;
2480         }
2481         default:
2482                 panic("unexpected expression kind");
2483         }
2484 }
2485
2486 static ir_node *create_lazy_op(const binary_expression_t *expression)
2487 {
2488         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2489         type_t   *type = skip_typeref(expression->base.type);
2490         ir_mode  *mode = get_ir_mode_arithmetic(type);
2491
2492         if (is_constant_expression(expression->left)) {
2493                 long val = fold_constant(expression->left);
2494                 expression_kind_t ekind = expression->base.kind;
2495                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2496                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2497                         if (val == 0) {
2498                                 return new_Const(get_mode_null(mode));
2499                         }
2500                 } else {
2501                         if (val != 0) {
2502                                 return new_Const(get_mode_one(mode));
2503                         }
2504                 }
2505
2506                 if (is_constant_expression(expression->right)) {
2507                         long const valr = fold_constant(expression->right);
2508                         return valr != 0 ?
2509                                 new_Const(get_mode_one(mode)) :
2510                                 new_Const(get_mode_null(mode));
2511                 }
2512
2513                 return produce_condition_result(expression->right, mode, dbgi);
2514         }
2515
2516         return produce_condition_result((const expression_t*) expression, mode,
2517                                         dbgi);
2518 }
2519
2520 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2521                                             ir_node *right, ir_mode *mode);
2522
2523 static ir_node *create_assign_binop(const binary_expression_t *expression)
2524 {
2525         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2526         const expression_t *left_expr = expression->left;
2527         type_t             *type      = skip_typeref(left_expr->base.type);
2528         ir_mode            *left_mode = get_ir_mode_storage(type);
2529         ir_node            *right     = expression_to_firm(expression->right);
2530         ir_node            *left_addr = expression_to_addr(left_expr);
2531         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2532         ir_node            *result    = create_op(dbgi, expression, left, right);
2533
2534         result = create_conv(dbgi, result, left_mode);
2535         result = do_strict_conv(dbgi, result);
2536
2537         result = set_value_for_expression_addr(left_expr, result, left_addr);
2538
2539         if (!is_type_compound(type)) {
2540                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2541                 result = create_conv(dbgi, result, mode_arithmetic);
2542         }
2543         return result;
2544 }
2545
2546 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2547 {
2548         expression_kind_t kind = expression->base.kind;
2549
2550         switch(kind) {
2551         case EXPR_BINARY_EQUAL:
2552         case EXPR_BINARY_NOTEQUAL:
2553         case EXPR_BINARY_LESS:
2554         case EXPR_BINARY_LESSEQUAL:
2555         case EXPR_BINARY_GREATER:
2556         case EXPR_BINARY_GREATEREQUAL:
2557         case EXPR_BINARY_ISGREATER:
2558         case EXPR_BINARY_ISGREATEREQUAL:
2559         case EXPR_BINARY_ISLESS:
2560         case EXPR_BINARY_ISLESSEQUAL:
2561         case EXPR_BINARY_ISLESSGREATER:
2562         case EXPR_BINARY_ISUNORDERED: {
2563                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2564                 ir_node *left  = expression_to_firm(expression->left);
2565                 ir_node *right = expression_to_firm(expression->right);
2566                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2567                 long     pnc   = get_pnc(kind, expression->left->base.type);
2568                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2569                 return proj;
2570         }
2571         case EXPR_BINARY_ASSIGN: {
2572                 ir_node *addr  = expression_to_addr(expression->left);
2573                 ir_node *right = expression_to_firm(expression->right);
2574                 ir_node *res
2575                         = set_value_for_expression_addr(expression->left, right, addr);
2576
2577                 type_t  *type            = skip_typeref(expression->base.type);
2578                 if (!is_type_compound(type)) {
2579                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2580                         res                      = create_conv(NULL, res, mode_arithmetic);
2581                 }
2582                 return res;
2583         }
2584         case EXPR_BINARY_ADD:
2585         case EXPR_BINARY_SUB:
2586         case EXPR_BINARY_MUL:
2587         case EXPR_BINARY_DIV:
2588         case EXPR_BINARY_MOD:
2589         case EXPR_BINARY_BITWISE_AND:
2590         case EXPR_BINARY_BITWISE_OR:
2591         case EXPR_BINARY_BITWISE_XOR:
2592         case EXPR_BINARY_SHIFTLEFT:
2593         case EXPR_BINARY_SHIFTRIGHT:
2594         {
2595                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2596                 ir_node  *left  = expression_to_firm(expression->left);
2597                 ir_node  *right = expression_to_firm(expression->right);
2598                 return create_op(dbgi, expression, left, right);
2599         }
2600         case EXPR_BINARY_LOGICAL_AND:
2601         case EXPR_BINARY_LOGICAL_OR:
2602                 return create_lazy_op(expression);
2603         case EXPR_BINARY_COMMA:
2604                 /* create side effects of left side */
2605                 (void) expression_to_firm(expression->left);
2606                 return _expression_to_firm(expression->right);
2607
2608         case EXPR_BINARY_ADD_ASSIGN:
2609         case EXPR_BINARY_SUB_ASSIGN:
2610         case EXPR_BINARY_MUL_ASSIGN:
2611         case EXPR_BINARY_MOD_ASSIGN:
2612         case EXPR_BINARY_DIV_ASSIGN:
2613         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2614         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2615         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2616         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2617         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2618                 return create_assign_binop(expression);
2619         default:
2620                 panic("TODO binexpr type");
2621         }
2622 }
2623
2624 static ir_node *array_access_addr(const array_access_expression_t *expression)
2625 {
2626         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2627         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2628         ir_node  *offset      = expression_to_firm(expression->index);
2629         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2630         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2631         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2632
2633         return result;
2634 }
2635
2636 static ir_node *array_access_to_firm(
2637                 const array_access_expression_t *expression)
2638 {
2639         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2640         ir_node  *addr   = array_access_addr(expression);
2641         type_t   *type   = revert_automatic_type_conversion(
2642                         (const expression_t*) expression);
2643         type             = skip_typeref(type);
2644
2645         return deref_address(dbgi, type, addr);
2646 }
2647
2648 static long get_offsetof_offset(const offsetof_expression_t *expression)
2649 {
2650         type_t *orig_type = expression->type;
2651         long    offset    = 0;
2652
2653         designator_t *designator = expression->designator;
2654         for ( ; designator != NULL; designator = designator->next) {
2655                 type_t *type = skip_typeref(orig_type);
2656                 /* be sure the type is constructed */
2657                 (void) get_ir_type(type);
2658
2659                 if (designator->symbol != NULL) {
2660                         assert(is_type_compound(type));
2661                         symbol_t *symbol = designator->symbol;
2662
2663                         compound_t *compound = type->compound.compound;
2664                         entity_t   *iter     = compound->members.entities;
2665                         for ( ; iter != NULL; iter = iter->base.next) {
2666                                 if (iter->base.symbol == symbol) {
2667                                         break;
2668                                 }
2669                         }
2670                         assert(iter != NULL);
2671
2672                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2673                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2674                         offset += get_entity_offset(iter->compound_member.entity);
2675
2676                         orig_type = iter->declaration.type;
2677                 } else {
2678                         expression_t *array_index = designator->array_index;
2679                         assert(designator->array_index != NULL);
2680                         assert(is_type_array(type));
2681
2682                         long index         = fold_constant(array_index);
2683                         ir_type *arr_type  = get_ir_type(type);
2684                         ir_type *elem_type = get_array_element_type(arr_type);
2685                         long     elem_size = get_type_size_bytes(elem_type);
2686
2687                         offset += index * elem_size;
2688
2689                         orig_type = type->array.element_type;
2690                 }
2691         }
2692
2693         return offset;
2694 }
2695
2696 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2697 {
2698         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2699         long      offset = get_offsetof_offset(expression);
2700         tarval   *tv     = new_tarval_from_long(offset, mode);
2701         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2702
2703         return new_d_Const(dbgi, tv);
2704 }
2705
2706 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2707                                      ir_entity *entity, type_t *type);
2708
2709 static ir_node *compound_literal_to_firm(
2710                 const compound_literal_expression_t *expression)
2711 {
2712         type_t *type = expression->type;
2713
2714         /* create an entity on the stack */
2715         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2716
2717         ident     *const id     = id_unique("CompLit.%u");
2718         ir_type   *const irtype = get_ir_type(type);
2719         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2720         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2721         set_entity_ld_ident(entity, id);
2722
2723         set_entity_variability(entity, variability_uninitialized);
2724
2725         /* create initialisation code */
2726         initializer_t *initializer = expression->initializer;
2727         create_local_initializer(initializer, dbgi, entity, type);
2728
2729         /* create a sel for the compound literal address */
2730         ir_node *frame = get_local_frame(entity);
2731         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2732         return sel;
2733 }
2734
2735 /**
2736  * Transform a sizeof expression into Firm code.
2737  */
2738 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2739 {
2740         type_t *type = expression->type;
2741         if (type == NULL) {
2742                 type = expression->tp_expression->base.type;
2743                 assert(type != NULL);
2744         }
2745
2746         type = skip_typeref(type);
2747         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2748         if (is_type_array(type) && type->array.is_vla
2749                         && expression->tp_expression != NULL) {
2750                 expression_to_firm(expression->tp_expression);
2751         }
2752
2753         return get_type_size(type);
2754 }
2755
2756 static entity_t *get_expression_entity(const expression_t *expression)
2757 {
2758         if (expression->kind != EXPR_REFERENCE)
2759                 return NULL;
2760
2761         return expression->reference.entity;
2762 }
2763
2764 /**
2765  * Transform an alignof expression into Firm code.
2766  */
2767 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2768 {
2769         ir_entity *irentity = NULL;
2770
2771         const expression_t *tp_expression = expression->tp_expression;
2772         if (tp_expression != NULL) {
2773                 entity_t *entity = get_expression_entity(tp_expression);
2774                 if (entity != NULL && is_declaration(entity)) {
2775                         switch (entity->declaration.kind) {
2776                         case DECLARATION_KIND_UNKNOWN:
2777                                 panic("unknown entity reference found");
2778                         case DECLARATION_KIND_COMPOUND_MEMBER:
2779                                 irentity = entity->compound_member.entity;
2780                                 break;
2781                         case DECLARATION_KIND_GLOBAL_VARIABLE:
2782                         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2783                                 irentity = entity->variable.v.entity;
2784                                 break;
2785                         case DECLARATION_KIND_PARAMETER_ENTITY:
2786                                 irentity = entity->parameter.v.entity;
2787                                 break;
2788                         case DECLARATION_KIND_FUNCTION:
2789                         case DECLARATION_KIND_INNER_FUNCTION:
2790                                 irentity = entity->function.entity;
2791                                 break;
2792                         case DECLARATION_KIND_PARAMETER:
2793                         case DECLARATION_KIND_LOCAL_VARIABLE:
2794                         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2795                                 break;
2796                         }
2797                 }
2798         }
2799
2800         ir_type *irtype;
2801         if (irentity != NULL) {
2802                 irtype = get_entity_type(irentity);
2803         } else {
2804                 type_t *type = expression->type;
2805                 irtype = get_ir_type(type);
2806         }
2807
2808         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2809         symconst_symbol sym;
2810         sym.type_p = irtype;
2811         return new_SymConst(mode, sym, symconst_type_align);
2812 }
2813
2814 static void init_ir_types(void);
2815
2816 long fold_constant(const expression_t *expression)
2817 {
2818         assert(is_type_valid(skip_typeref(expression->base.type)));
2819
2820         bool constant_folding_old = constant_folding;
2821         constant_folding = true;
2822
2823         init_ir_types();
2824
2825         assert(is_constant_expression(expression));
2826
2827         ir_graph *old_current_ir_graph = current_ir_graph;
2828         current_ir_graph = get_const_code_irg();
2829
2830         ir_node *cnst = expression_to_firm(expression);
2831         current_ir_graph = old_current_ir_graph;
2832
2833         if (!is_Const(cnst)) {
2834                 panic("couldn't fold constant");
2835         }
2836
2837         tarval *tv = get_Const_tarval(cnst);
2838         if (!tarval_is_long(tv)) {
2839                 panic("result of constant folding is not integer");
2840         }
2841
2842         constant_folding = constant_folding_old;
2843
2844         return get_tarval_long(tv);
2845 }
2846
2847 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2848 {
2849         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2850
2851         /* first try to fold a constant condition */
2852         if (is_constant_expression(expression->condition)) {
2853                 long val = fold_constant(expression->condition);
2854                 if (val) {
2855                         expression_t *true_expression = expression->true_expression;
2856                         if (true_expression == NULL)
2857                                 true_expression = expression->condition;
2858                         return expression_to_firm(true_expression);
2859                 } else {
2860                         return expression_to_firm(expression->false_expression);
2861                 }
2862         }
2863
2864         ir_node *cur_block   = get_cur_block();
2865
2866         /* create the true block */
2867         ir_node *true_block  = new_immBlock();
2868         set_cur_block(true_block);
2869
2870         ir_node *true_val = expression->true_expression != NULL ?
2871                 expression_to_firm(expression->true_expression) : NULL;
2872         ir_node *true_jmp = new_Jmp();
2873
2874         /* create the false block */
2875         ir_node *false_block = new_immBlock();
2876         set_cur_block(false_block);
2877
2878         ir_node *false_val = expression_to_firm(expression->false_expression);
2879         ir_node *false_jmp = new_Jmp();
2880
2881         /* create the condition evaluation */
2882         set_cur_block(cur_block);
2883         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2884         if (expression->true_expression == NULL) {
2885                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2886                         true_val = cond_expr;
2887                 } else {
2888                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2889                          * comparison.  Generate a "1" as value for the true branch. */
2890                         true_val = new_Const(get_mode_one(mode_Is));
2891                 }
2892         }
2893         mature_immBlock(true_block);
2894         mature_immBlock(false_block);
2895
2896         /* create the common block */
2897         ir_node *in_cf[2] = { true_jmp, false_jmp };
2898         new_Block(2, in_cf);
2899
2900         /* TODO improve static semantics, so either both or no values are NULL */
2901         if (true_val == NULL || false_val == NULL)
2902                 return NULL;
2903
2904         ir_node *in[2] = { true_val, false_val };
2905         ir_mode *mode  = get_irn_mode(true_val);
2906         assert(get_irn_mode(false_val) == mode);
2907         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2908
2909         return val;
2910 }
2911
2912 /**
2913  * Returns an IR-node representing the address of a field.
2914  */
2915 static ir_node *select_addr(const select_expression_t *expression)
2916 {
2917         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2918
2919         construct_select_compound(expression);
2920
2921         ir_node *compound_addr = expression_to_firm(expression->compound);
2922
2923         entity_t *entry = expression->compound_entry;
2924         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2925         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2926
2927         if (constant_folding) {
2928                 ir_mode *mode = get_irn_mode(compound_addr);
2929                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2930                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
2931                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2932         } else {
2933                 ir_entity *irentity = entry->compound_member.entity;
2934                 assert(irentity != NULL);
2935                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2936         }
2937 }
2938
2939 static ir_node *select_to_firm(const select_expression_t *expression)
2940 {
2941         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2942         ir_node  *addr = select_addr(expression);
2943         type_t   *type = revert_automatic_type_conversion(
2944                         (const expression_t*) expression);
2945         type           = skip_typeref(type);
2946
2947         entity_t *entry      = expression->compound_entry;
2948         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2949         type_t   *entry_type = skip_typeref(entry->declaration.type);
2950
2951         if (entry_type->kind == TYPE_BITFIELD) {
2952                 return bitfield_extract_to_firm(expression, addr);
2953         }
2954
2955         return deref_address(dbgi, type, addr);
2956 }
2957
2958 /* Values returned by __builtin_classify_type. */
2959 typedef enum gcc_type_class
2960 {
2961         no_type_class = -1,
2962         void_type_class,
2963         integer_type_class,
2964         char_type_class,
2965         enumeral_type_class,
2966         boolean_type_class,
2967         pointer_type_class,
2968         reference_type_class,
2969         offset_type_class,
2970         real_type_class,
2971         complex_type_class,
2972         function_type_class,
2973         method_type_class,
2974         record_type_class,
2975         union_type_class,
2976         array_type_class,
2977         string_type_class,
2978         set_type_class,
2979         file_type_class,
2980         lang_type_class
2981 } gcc_type_class;
2982
2983 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2984 {
2985         type_t *type = expr->type_expression->base.type;
2986
2987         /* FIXME gcc returns different values depending on whether compiling C or C++
2988          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2989         gcc_type_class tc;
2990         for (;;) {
2991                 type = skip_typeref(type);
2992                 switch (type->kind) {
2993                         case TYPE_ATOMIC: {
2994                                 const atomic_type_t *const atomic_type = &type->atomic;
2995                                 switch (atomic_type->akind) {
2996                                         /* should not be reached */
2997                                         case ATOMIC_TYPE_INVALID:
2998                                                 tc = no_type_class;
2999                                                 goto make_const;
3000
3001                                         /* gcc cannot do that */
3002                                         case ATOMIC_TYPE_VOID:
3003                                                 tc = void_type_class;
3004                                                 goto make_const;
3005
3006                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3007                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3008                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3009                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3010                                         case ATOMIC_TYPE_SHORT:
3011                                         case ATOMIC_TYPE_USHORT:
3012                                         case ATOMIC_TYPE_INT:
3013                                         case ATOMIC_TYPE_UINT:
3014                                         case ATOMIC_TYPE_LONG:
3015                                         case ATOMIC_TYPE_ULONG:
3016                                         case ATOMIC_TYPE_LONGLONG:
3017                                         case ATOMIC_TYPE_ULONGLONG:
3018                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3019                                                 tc = integer_type_class;
3020                                                 goto make_const;
3021
3022                                         case ATOMIC_TYPE_FLOAT:
3023                                         case ATOMIC_TYPE_DOUBLE:
3024                                         case ATOMIC_TYPE_LONG_DOUBLE:
3025                                                 tc = real_type_class;
3026                                                 goto make_const;
3027                                 }
3028                                 panic("Unexpected atomic type in classify_type_to_firm().");
3029                         }
3030
3031                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3032                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3033                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3034                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3035                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3036                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3037                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3038                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3039
3040                         /* gcc handles this as integer */
3041                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3042
3043                         /* gcc classifies the referenced type */
3044                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3045
3046                         case TYPE_BUILTIN:
3047                         /* typedef/typeof should be skipped already */
3048                         case TYPE_TYPEDEF:
3049                         case TYPE_TYPEOF:
3050                         case TYPE_INVALID:
3051                         case TYPE_ERROR:
3052                                 break;
3053                 }
3054                 panic("unexpected TYPE classify_type_to_firm().");
3055         }
3056
3057 make_const:;
3058         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3059         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3060         return new_d_Const(dbgi, tv);
3061 }
3062
3063 static ir_node *function_name_to_firm(
3064                 const funcname_expression_t *const expr)
3065 {
3066         switch(expr->kind) {
3067         case FUNCNAME_FUNCTION:
3068         case FUNCNAME_PRETTY_FUNCTION:
3069         case FUNCNAME_FUNCDNAME:
3070                 if (current_function_name == NULL) {
3071                         const source_position_t *const src_pos = &expr->base.source_position;
3072                         const char    *name  = current_function_entity->base.symbol->string;
3073                         const string_t string = { name, strlen(name) + 1 };
3074                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3075                 }
3076                 return current_function_name;
3077         case FUNCNAME_FUNCSIG:
3078                 if (current_funcsig == NULL) {
3079                         const source_position_t *const src_pos = &expr->base.source_position;
3080                         ir_entity *ent = get_irg_entity(current_ir_graph);
3081                         const char *const name = get_entity_ld_name(ent);
3082                         const string_t string = { name, strlen(name) + 1 };
3083                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3084                 }
3085                 return current_funcsig;
3086         }
3087         panic("Unsupported function name");
3088 }
3089
3090 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3091 {
3092         statement_t *statement = expr->statement;
3093
3094         assert(statement->kind == STATEMENT_COMPOUND);
3095         return compound_statement_to_firm(&statement->compound);
3096 }
3097
3098 static ir_node *va_start_expression_to_firm(
3099         const va_start_expression_t *const expr)
3100 {
3101         type_t    *const type        = current_function_entity->declaration.type;
3102         ir_type   *const method_type = get_ir_type(type);
3103         int        const n           = get_method_n_params(method_type) - 1;
3104         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3105         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
3106         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3107         ir_node   *const no_mem      = new_NoMem();
3108         ir_node   *const arg_sel     =
3109                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3110
3111         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
3112         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3113         set_value_for_expression(expr->ap, add);
3114
3115         return NULL;
3116 }
3117
3118 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3119 {
3120         type_t       *const type    = expr->base.type;
3121         expression_t *const ap_expr = expr->ap;
3122         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3123         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3124         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3125         ir_node      *const res     = deref_address(dbgi, type, ap);
3126
3127         ir_node      *const cnst    = get_type_size(expr->base.type);
3128         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
3129
3130         set_value_for_expression_addr(ap_expr, add, ap_addr);
3131
3132         return res;
3133 }
3134
3135 static ir_node *dereference_addr(const unary_expression_t *const expression)
3136 {
3137         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3138         return expression_to_firm(expression->value);
3139 }
3140
3141 /**
3142  * Returns a IR-node representing an lvalue of the given expression.
3143  */
3144 static ir_node *expression_to_addr(const expression_t *expression)
3145 {
3146         switch(expression->kind) {
3147         case EXPR_ARRAY_ACCESS:
3148                 return array_access_addr(&expression->array_access);
3149         case EXPR_CALL:
3150                 return call_expression_to_firm(&expression->call);
3151         case EXPR_COMPOUND_LITERAL:
3152                 return compound_literal_to_firm(&expression->compound_literal);
3153         case EXPR_REFERENCE:
3154                 return reference_addr(&expression->reference);
3155         case EXPR_SELECT:
3156                 return select_addr(&expression->select);
3157         case EXPR_UNARY_DEREFERENCE:
3158                 return dereference_addr(&expression->unary);
3159         default:
3160                 break;
3161         }
3162         panic("trying to get address of non-lvalue");
3163 }
3164
3165 static ir_node *builtin_constant_to_firm(
3166                 const builtin_constant_expression_t *expression)
3167 {
3168         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3169         long     v;
3170
3171         if (is_constant_expression(expression->value)) {
3172                 v = 1;
3173         } else {
3174                 v = 0;
3175         }
3176         return new_Const_long(mode, v);
3177 }
3178
3179 static ir_node *builtin_types_compatible_to_firm(
3180                 const builtin_types_compatible_expression_t *expression)
3181 {
3182         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3183         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3184         long     const value = types_compatible(left, right) ? 1 : 0;
3185         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3186         return new_Const_long(mode, value);
3187 }
3188
3189 static ir_node *get_label_block(label_t *label)
3190 {
3191         if (label->block != NULL)
3192                 return label->block;
3193
3194         /* beware: might be called from create initializer with current_ir_graph
3195          * set to const_code_irg. */
3196         ir_graph *rem    = current_ir_graph;
3197         current_ir_graph = current_function;
3198
3199         ir_node *block = new_immBlock();
3200
3201         label->block = block;
3202
3203         ARR_APP1(label_t *, all_labels, label);
3204
3205         current_ir_graph = rem;
3206         return block;
3207 }
3208
3209 /**
3210  * Pointer to a label.  This is used for the
3211  * GNU address-of-label extension.
3212  */
3213 static ir_node *label_address_to_firm(
3214                 const label_address_expression_t *label)
3215 {
3216         ir_node    *block = get_label_block(label->label);
3217         ir_label_t  nr    = get_Block_label(block);
3218
3219         if (nr == 0) {
3220                 nr = get_irp_next_label_nr();
3221                 set_Block_label(block, nr);
3222         }
3223         symconst_symbol value;
3224         value.label = nr;
3225         return new_SymConst(mode_P_code, value, symconst_label);
3226 }
3227
3228 static ir_node *builtin_symbol_to_firm(
3229                 const builtin_symbol_expression_t *expression)
3230 {
3231         /* for gcc compatibility we have to produce (dummy) addresses for some
3232          * builtins */
3233         if (warning.other) {
3234                 warningf(&expression->base.source_position,
3235                                  "taking address of builtin '%Y'", expression->symbol);
3236         }
3237
3238         /* simply create a NULL pointer */
3239         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
3240         ir_node  *res  = new_Const_long(mode, 0);
3241
3242         return res;
3243 }
3244
3245 /**
3246  * creates firm nodes for an expression. The difference between this function
3247  * and expression_to_firm is, that this version might produce mode_b nodes
3248  * instead of mode_Is.
3249  */
3250 static ir_node *_expression_to_firm(const expression_t *expression)
3251 {
3252 #ifndef NDEBUG
3253         if (!constant_folding) {
3254                 assert(!expression->base.transformed);
3255                 ((expression_t*) expression)->base.transformed = true;
3256         }
3257 #endif
3258
3259         switch (expression->kind) {
3260         case EXPR_CHARACTER_CONSTANT:
3261                 return character_constant_to_firm(&expression->conste);
3262         case EXPR_WIDE_CHARACTER_CONSTANT:
3263                 return wide_character_constant_to_firm(&expression->conste);
3264         case EXPR_CONST:
3265                 return const_to_firm(&expression->conste);
3266         case EXPR_STRING_LITERAL:
3267                 return string_literal_to_firm(&expression->string);
3268         case EXPR_WIDE_STRING_LITERAL:
3269                 return wide_string_literal_to_firm(&expression->wide_string);
3270         case EXPR_REFERENCE:
3271                 return reference_expression_to_firm(&expression->reference);
3272         case EXPR_REFERENCE_ENUM_VALUE:
3273                 return reference_expression_enum_value_to_firm(&expression->reference);
3274         case EXPR_CALL:
3275                 return call_expression_to_firm(&expression->call);
3276         EXPR_UNARY_CASES
3277                 return unary_expression_to_firm(&expression->unary);
3278         EXPR_BINARY_CASES
3279                 return binary_expression_to_firm(&expression->binary);
3280         case EXPR_ARRAY_ACCESS:
3281                 return array_access_to_firm(&expression->array_access);
3282         case EXPR_SIZEOF:
3283                 return sizeof_to_firm(&expression->typeprop);
3284         case EXPR_ALIGNOF:
3285                 return alignof_to_firm(&expression->typeprop);
3286         case EXPR_CONDITIONAL:
3287                 return conditional_to_firm(&expression->conditional);
3288         case EXPR_SELECT:
3289                 return select_to_firm(&expression->select);
3290         case EXPR_CLASSIFY_TYPE:
3291                 return classify_type_to_firm(&expression->classify_type);
3292         case EXPR_FUNCNAME:
3293                 return function_name_to_firm(&expression->funcname);
3294         case EXPR_STATEMENT:
3295                 return statement_expression_to_firm(&expression->statement);
3296         case EXPR_VA_START:
3297                 return va_start_expression_to_firm(&expression->va_starte);
3298         case EXPR_VA_ARG:
3299                 return va_arg_expression_to_firm(&expression->va_arge);
3300         case EXPR_BUILTIN_SYMBOL:
3301                 return builtin_symbol_to_firm(&expression->builtin_symbol);
3302         case EXPR_BUILTIN_CONSTANT_P:
3303                 return builtin_constant_to_firm(&expression->builtin_constant);
3304         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3305                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3306         case EXPR_OFFSETOF:
3307                 return offsetof_to_firm(&expression->offsetofe);
3308         case EXPR_COMPOUND_LITERAL:
3309                 return compound_literal_to_firm(&expression->compound_literal);
3310         case EXPR_LABEL_ADDRESS:
3311                 return label_address_to_firm(&expression->label_address);
3312
3313         case EXPR_UNKNOWN:
3314         case EXPR_INVALID:
3315                 break;
3316         }
3317         panic("invalid expression found");
3318 }
3319
3320 static bool is_builtin_expect(const expression_t *expression)
3321 {
3322         if (expression->kind != EXPR_CALL)
3323                 return false;
3324
3325         expression_t *function = expression->call.function;
3326         if (function->kind != EXPR_BUILTIN_SYMBOL)
3327                 return false;
3328         if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3329                 return false;
3330
3331         return true;
3332 }
3333
3334 static bool produces_mode_b(const expression_t *expression)
3335 {
3336         switch (expression->kind) {
3337         case EXPR_BINARY_EQUAL:
3338         case EXPR_BINARY_NOTEQUAL:
3339         case EXPR_BINARY_LESS:
3340         case EXPR_BINARY_LESSEQUAL:
3341         case EXPR_BINARY_GREATER:
3342         case EXPR_BINARY_GREATEREQUAL:
3343         case EXPR_BINARY_ISGREATER:
3344         case EXPR_BINARY_ISGREATEREQUAL:
3345         case EXPR_BINARY_ISLESS:
3346         case EXPR_BINARY_ISLESSEQUAL:
3347         case EXPR_BINARY_ISLESSGREATER:
3348         case EXPR_BINARY_ISUNORDERED:
3349         case EXPR_UNARY_NOT:
3350                 return true;
3351
3352         case EXPR_CALL:
3353                 if (is_builtin_expect(expression)) {
3354                         expression_t *argument = expression->call.arguments->expression;
3355                         return produces_mode_b(argument);
3356                 }
3357                 return false;
3358         case EXPR_BINARY_COMMA:
3359                 return produces_mode_b(expression->binary.right);
3360
3361         default:
3362                 return false;
3363         }
3364 }
3365
3366 static ir_node *expression_to_firm(const expression_t *expression)
3367 {
3368         if (!produces_mode_b(expression)) {
3369                 ir_node *res = _expression_to_firm(expression);
3370                 assert(res == NULL || get_irn_mode(res) != mode_b);
3371                 return res;
3372         }
3373
3374         if (is_constant_expression(expression)) {
3375                 ir_node *res  = _expression_to_firm(expression);
3376                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3377                 assert(is_Const(res));
3378                 if (is_Const_null(res)) {
3379                         return new_Const_long(mode, 0);
3380                 } else {
3381                         return new_Const_long(mode, 1);
3382                 }
3383         }
3384
3385         /* we have to produce a 0/1 from the mode_b expression */
3386         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3387         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3388         return produce_condition_result(expression, mode, dbgi);
3389 }
3390
3391 /**
3392  * create a short-circuit expression evaluation that tries to construct
3393  * efficient control flow structures for &&, || and ! expressions
3394  */
3395 static ir_node *create_condition_evaluation(const expression_t *expression,
3396                                             ir_node *true_block,
3397                                             ir_node *false_block)
3398 {
3399         switch(expression->kind) {
3400         case EXPR_UNARY_NOT: {
3401                 const unary_expression_t *unary_expression = &expression->unary;
3402                 create_condition_evaluation(unary_expression->value, false_block,
3403                                             true_block);
3404                 return NULL;
3405         }
3406         case EXPR_BINARY_LOGICAL_AND: {
3407                 const binary_expression_t *binary_expression = &expression->binary;
3408
3409                 ir_node *extra_block = new_immBlock();
3410                 create_condition_evaluation(binary_expression->left, extra_block,
3411                                             false_block);
3412                 mature_immBlock(extra_block);
3413                 set_cur_block(extra_block);
3414                 create_condition_evaluation(binary_expression->right, true_block,
3415                                             false_block);
3416                 return NULL;
3417         }
3418         case EXPR_BINARY_LOGICAL_OR: {
3419                 const binary_expression_t *binary_expression = &expression->binary;
3420
3421                 ir_node *extra_block = new_immBlock();
3422                 create_condition_evaluation(binary_expression->left, true_block,
3423                                             extra_block);
3424                 mature_immBlock(extra_block);
3425                 set_cur_block(extra_block);
3426                 create_condition_evaluation(binary_expression->right, true_block,
3427                                             false_block);
3428                 return NULL;
3429         }
3430         default:
3431                 break;
3432         }
3433
3434         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3435         ir_node  *cond_expr  = _expression_to_firm(expression);
3436         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3437         ir_node  *cond       = new_d_Cond(dbgi, condition);
3438         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3439         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3440
3441         /* set branch prediction info based on __builtin_expect */
3442         if (is_builtin_expect(expression) && is_Cond(cond)) {
3443                 call_argument_t *argument = expression->call.arguments->next;
3444                 if (is_constant_expression(argument->expression)) {
3445                         long               cnst = fold_constant(argument->expression);
3446                         cond_jmp_predicate pred;
3447
3448                         if (cnst == 0) {
3449                                 pred = COND_JMP_PRED_FALSE;
3450                         } else {
3451                                 pred = COND_JMP_PRED_TRUE;
3452                         }
3453                         set_Cond_jmp_pred(cond, pred);
3454                 }
3455         }
3456
3457         add_immBlock_pred(true_block, true_proj);
3458         add_immBlock_pred(false_block, false_proj);
3459
3460         set_cur_block(NULL);
3461         return cond_expr;
3462 }
3463
3464
3465 static void create_variable_entity(entity_t *variable,
3466                                    declaration_kind_t declaration_kind,
3467                                    ir_type *parent_type)
3468 {
3469         assert(variable->kind == ENTITY_VARIABLE);
3470         type_t    *type = skip_typeref(variable->declaration.type);
3471         type            = get_aligned_type(type, variable->variable.alignment);
3472
3473         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3474         ir_type   *const irtype   = get_ir_type(type);
3475         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3476
3477         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3478
3479         handle_gnu_attributes_ent(irentity, variable);
3480
3481         variable->declaration.kind  = (unsigned char) declaration_kind;
3482         variable->variable.v.entity = irentity;
3483         set_entity_variability(irentity, variability_uninitialized);
3484         set_entity_ld_ident(irentity, create_ld_ident(variable));
3485
3486         if (parent_type == get_tls_type())
3487                 set_entity_allocation(irentity, allocation_automatic);
3488         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3489                 set_entity_allocation(irentity, allocation_static);
3490
3491         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3492                 set_entity_volatility(irentity, volatility_is_volatile);
3493         }
3494 }
3495
3496
3497 typedef struct type_path_entry_t type_path_entry_t;
3498 struct type_path_entry_t {
3499         type_t           *type;
3500         ir_initializer_t *initializer;
3501         size_t            index;
3502         entity_t         *compound_entry;
3503 };
3504
3505 typedef struct type_path_t type_path_t;
3506 struct type_path_t {
3507         type_path_entry_t *path;
3508         type_t            *top_type;
3509         bool               invalid;
3510 };
3511
3512 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3513 {
3514         size_t len = ARR_LEN(path->path);
3515
3516         for (size_t i = 0; i < len; ++i) {
3517                 const type_path_entry_t *entry = & path->path[i];
3518
3519                 type_t *type = skip_typeref(entry->type);
3520                 if (is_type_compound(type)) {
3521                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3522                 } else if (is_type_array(type)) {
3523                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3524                 } else {
3525                         fprintf(stderr, "-INVALID-");
3526                 }
3527         }
3528         fprintf(stderr, "  (");
3529         print_type(path->top_type);
3530         fprintf(stderr, ")");
3531 }
3532
3533 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3534 {
3535         size_t len = ARR_LEN(path->path);
3536         assert(len > 0);
3537         return & path->path[len-1];
3538 }
3539
3540 static type_path_entry_t *append_to_type_path(type_path_t *path)
3541 {
3542         size_t len = ARR_LEN(path->path);
3543         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3544
3545         type_path_entry_t *result = & path->path[len];
3546         memset(result, 0, sizeof(result[0]));
3547         return result;
3548 }
3549
3550 static size_t get_compound_member_count(const compound_type_t *type)
3551 {
3552         compound_t *compound  = type->compound;
3553         size_t      n_members = 0;
3554         entity_t   *member    = compound->members.entities;
3555         for ( ; member != NULL; member = member->base.next) {
3556                 ++n_members;
3557         }
3558
3559         return n_members;
3560 }
3561
3562 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3563 {
3564         type_t *orig_top_type = path->top_type;
3565         type_t *top_type      = skip_typeref(orig_top_type);
3566
3567         assert(is_type_compound(top_type) || is_type_array(top_type));
3568
3569         if (ARR_LEN(path->path) == 0) {
3570                 return NULL;
3571         } else {
3572                 type_path_entry_t *top         = get_type_path_top(path);
3573                 ir_initializer_t  *initializer = top->initializer;
3574                 return get_initializer_compound_value(initializer, top->index);
3575         }
3576 }
3577
3578 static void descend_into_subtype(type_path_t *path)
3579 {
3580         type_t *orig_top_type = path->top_type;
3581         type_t *top_type      = skip_typeref(orig_top_type);
3582
3583         assert(is_type_compound(top_type) || is_type_array(top_type));
3584
3585         ir_initializer_t *initializer = get_initializer_entry(path);
3586
3587         type_path_entry_t *top = append_to_type_path(path);
3588         top->type              = top_type;
3589
3590         size_t len;
3591
3592         if (is_type_compound(top_type)) {
3593                 compound_t *compound = top_type->compound.compound;
3594                 entity_t   *entry    = compound->members.entities;
3595
3596                 top->compound_entry = entry;
3597                 top->index          = 0;
3598                 len                 = get_compound_member_count(&top_type->compound);
3599                 if (entry != NULL) {
3600                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3601                         path->top_type = entry->declaration.type;
3602                 }
3603         } else {
3604                 assert(is_type_array(top_type));
3605                 assert(top_type->array.size > 0);
3606
3607                 top->index     = 0;
3608                 path->top_type = top_type->array.element_type;
3609                 len            = top_type->array.size;
3610         }
3611         if (initializer == NULL
3612                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3613                 initializer = create_initializer_compound(len);
3614                 /* we have to set the entry at the 2nd latest path entry... */
3615                 size_t path_len = ARR_LEN(path->path);
3616                 assert(path_len >= 1);
3617                 if (path_len > 1) {
3618                         type_path_entry_t *entry        = & path->path[path_len-2];
3619                         ir_initializer_t  *tinitializer = entry->initializer;
3620                         set_initializer_compound_value(tinitializer, entry->index,
3621                                                        initializer);
3622                 }
3623         }
3624         top->initializer = initializer;
3625 }
3626
3627 static void ascend_from_subtype(type_path_t *path)
3628 {
3629         type_path_entry_t *top = get_type_path_top(path);
3630
3631         path->top_type = top->type;
3632
3633         size_t len = ARR_LEN(path->path);
3634         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3635 }
3636
3637 static void walk_designator(type_path_t *path, const designator_t *designator)
3638 {
3639         /* designators start at current object type */
3640         ARR_RESIZE(type_path_entry_t, path->path, 1);
3641
3642         for ( ; designator != NULL; designator = designator->next) {
3643                 type_path_entry_t *top         = get_type_path_top(path);
3644                 type_t            *orig_type   = top->type;
3645                 type_t            *type        = skip_typeref(orig_type);
3646
3647                 if (designator->symbol != NULL) {
3648                         assert(is_type_compound(type));
3649                         size_t    index  = 0;
3650                         symbol_t *symbol = designator->symbol;
3651
3652                         compound_t *compound = type->compound.compound;
3653                         entity_t   *iter     = compound->members.entities;
3654                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3655                                 if (iter->base.symbol == symbol) {
3656                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3657                                         break;
3658                                 }
3659                         }
3660                         assert(iter != NULL);
3661
3662                         top->type           = orig_type;
3663                         top->compound_entry = iter;
3664                         top->index          = index;
3665                         orig_type           = iter->declaration.type;
3666                 } else {
3667                         expression_t *array_index = designator->array_index;
3668                         assert(designator->array_index != NULL);
3669                         assert(is_type_array(type));
3670
3671                         long index = fold_constant(array_index);
3672                         assert(index >= 0);
3673 #ifndef NDEBUG
3674                         if (type->array.size_constant) {
3675                                 long array_size = type->array.size;
3676                                 assert(index < array_size);
3677                         }
3678 #endif
3679
3680                         top->type  = orig_type;
3681                         top->index = (size_t) index;
3682                         orig_type  = type->array.element_type;
3683                 }
3684                 path->top_type = orig_type;
3685
3686                 if (designator->next != NULL) {
3687                         descend_into_subtype(path);
3688                 }
3689         }
3690
3691         path->invalid  = false;
3692 }
3693
3694 static void advance_current_object(type_path_t *path)
3695 {
3696         if (path->invalid) {
3697                 /* TODO: handle this... */
3698                 panic("invalid initializer in ast2firm (excessive elements)");
3699         }
3700
3701         type_path_entry_t *top = get_type_path_top(path);
3702
3703         type_t *type = skip_typeref(top->type);
3704         if (is_type_union(type)) {
3705                 top->compound_entry = NULL;
3706         } else if (is_type_struct(type)) {
3707                 entity_t *entry = top->compound_entry;
3708
3709                 top->index++;
3710                 entry               = entry->base.next;
3711                 top->compound_entry = entry;
3712                 if (entry != NULL) {
3713                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3714                         path->top_type = entry->declaration.type;
3715                         return;
3716                 }
3717         } else {
3718                 assert(is_type_array(type));
3719
3720                 top->index++;
3721                 if (!type->array.size_constant || top->index < type->array.size) {
3722                         return;
3723                 }
3724         }
3725
3726         /* we're past the last member of the current sub-aggregate, try if we
3727          * can ascend in the type hierarchy and continue with another subobject */
3728         size_t len = ARR_LEN(path->path);
3729
3730         if (len > 1) {
3731                 ascend_from_subtype(path);
3732                 advance_current_object(path);
3733         } else {
3734                 path->invalid = true;
3735         }
3736 }
3737
3738
3739 static ir_initializer_t *create_ir_initializer(
3740                 const initializer_t *initializer, type_t *type);
3741
3742 static ir_initializer_t *create_ir_initializer_value(
3743                 const initializer_value_t *initializer)
3744 {
3745         if (is_type_compound(initializer->value->base.type)) {
3746                 panic("initializer creation for compounds not implemented yet");
3747         }
3748         ir_node *value = expression_to_firm(initializer->value);
3749         type_t  *type  = initializer->value->base.type;
3750         ir_mode *mode  = get_ir_mode_storage(type);
3751         value          = create_conv(NULL, value, mode);
3752         return create_initializer_const(value);
3753 }
3754
3755 /** test wether type can be initialized by a string constant */
3756 static bool is_string_type(type_t *type)
3757 {
3758         type_t *inner;
3759         if (is_type_pointer(type)) {
3760                 inner = skip_typeref(type->pointer.points_to);
3761         } else if(is_type_array(type)) {
3762                 inner = skip_typeref(type->array.element_type);
3763         } else {
3764                 return false;
3765         }
3766
3767         return is_type_integer(inner);
3768 }
3769
3770 static ir_initializer_t *create_ir_initializer_list(
3771                 const initializer_list_t *initializer, type_t *type)
3772 {
3773         type_path_t path;
3774         memset(&path, 0, sizeof(path));
3775         path.top_type = type;
3776         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3777
3778         descend_into_subtype(&path);
3779
3780         for (size_t i = 0; i < initializer->len; ++i) {
3781                 const initializer_t *sub_initializer = initializer->initializers[i];
3782
3783                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3784                         walk_designator(&path, sub_initializer->designator.designator);
3785                         continue;
3786                 }
3787
3788                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3789                         /* we might have to descend into types until we're at a scalar
3790                          * type */
3791                         while(true) {
3792                                 type_t *orig_top_type = path.top_type;
3793                                 type_t *top_type      = skip_typeref(orig_top_type);
3794
3795                                 if (is_type_scalar(top_type))
3796                                         break;
3797                                 descend_into_subtype(&path);
3798                         }
3799                 } else if (sub_initializer->kind == INITIALIZER_STRING
3800                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3801                         /* we might have to descend into types until we're at a scalar
3802                          * type */
3803                         while (true) {
3804                                 type_t *orig_top_type = path.top_type;
3805                                 type_t *top_type      = skip_typeref(orig_top_type);
3806
3807                                 if (is_string_type(top_type))
3808                                         break;
3809                                 descend_into_subtype(&path);
3810                         }
3811                 }
3812
3813                 ir_initializer_t *sub_irinitializer
3814                         = create_ir_initializer(sub_initializer, path.top_type);
3815
3816                 size_t path_len = ARR_LEN(path.path);
3817                 assert(path_len >= 1);
3818                 type_path_entry_t *entry        = & path.path[path_len-1];
3819                 ir_initializer_t  *tinitializer = entry->initializer;
3820                 set_initializer_compound_value(tinitializer, entry->index,
3821                                                sub_irinitializer);
3822
3823                 advance_current_object(&path);
3824         }
3825
3826         assert(ARR_LEN(path.path) >= 1);
3827         ir_initializer_t *result = path.path[0].initializer;
3828         DEL_ARR_F(path.path);
3829
3830         return result;
3831 }
3832
3833 static ir_initializer_t *create_ir_initializer_string(
3834                 const initializer_string_t *initializer, type_t *type)
3835 {
3836         type = skip_typeref(type);
3837
3838         size_t            string_len    = initializer->string.size;
3839         assert(type->kind == TYPE_ARRAY);
3840         assert(type->array.size_constant);
3841         size_t            len           = type->array.size;
3842         ir_initializer_t *irinitializer = create_initializer_compound(len);
3843
3844         const char *string = initializer->string.begin;
3845         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3846
3847         for (size_t i = 0; i < len; ++i) {
3848                 char c = 0;
3849                 if (i < string_len)
3850                         c = string[i];
3851
3852                 tarval           *tv = new_tarval_from_long(c, mode);
3853                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3854
3855                 set_initializer_compound_value(irinitializer, i, char_initializer);
3856         }
3857
3858         return irinitializer;
3859 }
3860
3861 static ir_initializer_t *create_ir_initializer_wide_string(
3862                 const initializer_wide_string_t *initializer, type_t *type)
3863 {
3864         size_t            string_len    = initializer->string.size;
3865         assert(type->kind == TYPE_ARRAY);
3866         assert(type->array.size_constant);
3867         size_t            len           = type->array.size;
3868         ir_initializer_t *irinitializer = create_initializer_compound(len);
3869
3870         const wchar_rep_t *string = initializer->string.begin;
3871         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3872
3873         for (size_t i = 0; i < len; ++i) {
3874                 wchar_rep_t c = 0;
3875                 if (i < string_len) {
3876                         c = string[i];
3877                 }
3878                 tarval *tv = new_tarval_from_long(c, mode);
3879                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3880
3881                 set_initializer_compound_value(irinitializer, i, char_initializer);
3882         }
3883
3884         return irinitializer;
3885 }
3886
3887 static ir_initializer_t *create_ir_initializer(
3888                 const initializer_t *initializer, type_t *type)
3889 {
3890         switch(initializer->kind) {
3891                 case INITIALIZER_STRING:
3892                         return create_ir_initializer_string(&initializer->string, type);
3893
3894                 case INITIALIZER_WIDE_STRING:
3895                         return create_ir_initializer_wide_string(&initializer->wide_string,
3896                                                                  type);
3897
3898                 case INITIALIZER_LIST:
3899                         return create_ir_initializer_list(&initializer->list, type);
3900
3901                 case INITIALIZER_VALUE:
3902                         return create_ir_initializer_value(&initializer->value);
3903
3904                 case INITIALIZER_DESIGNATOR:
3905                         panic("unexpected designator initializer found");
3906         }
3907         panic("unknown initializer");
3908 }
3909
3910 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3911                 ir_node *base_addr)
3912 {
3913         if (is_atomic_type(type)) {
3914                 ir_mode *mode = get_type_mode(type);
3915                 tarval  *zero = get_mode_null(mode);
3916                 ir_node *cnst = new_d_Const(dbgi, zero);
3917
3918                 /* TODO: bitfields */
3919                 ir_node *mem    = get_store();
3920                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3921                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3922                 set_store(proj_m);
3923         } else {
3924                 assert(is_compound_type(type));
3925
3926                 int n_members;
3927                 if (is_Array_type(type)) {
3928                         assert(has_array_upper_bound(type, 0));
3929                         n_members = get_array_upper_bound_int(type, 0);
3930                 } else {
3931                         n_members = get_compound_n_members(type);
3932                 }
3933
3934                 for (int i = 0; i < n_members; ++i) {
3935                         ir_node *addr;
3936                         ir_type *irtype;
3937                         if (is_Array_type(type)) {
3938                                 ir_entity *entity   = get_array_element_entity(type);
3939                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3940                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3941                                 ir_node   *in[1]    = { cnst };
3942                                 irtype = get_array_element_type(type);
3943                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3944                         } else {
3945                                 ir_entity *member = get_compound_member(type, i);
3946
3947                                 irtype = get_entity_type(member);
3948                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3949                         }
3950
3951                         create_dynamic_null_initializer(irtype, dbgi, addr);
3952                 }
3953         }
3954 }
3955
3956 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3957                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3958 {
3959         switch(get_initializer_kind(initializer)) {
3960         case IR_INITIALIZER_NULL: {
3961                 create_dynamic_null_initializer(type, dbgi, base_addr);
3962                 return;
3963         }
3964         case IR_INITIALIZER_CONST: {
3965                 ir_node *node     = get_initializer_const_value(initializer);
3966                 ir_mode *mode     = get_irn_mode(node);
3967                 ir_type *ent_type = get_entity_type(entity);
3968
3969                 /* is it a bitfield type? */
3970                 if (is_Primitive_type(ent_type) &&
3971                                 get_primitive_base_type(ent_type) != NULL) {
3972                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3973                         return;
3974                 }
3975
3976                 assert(get_type_mode(type) == mode);
3977                 ir_node *mem    = get_store();
3978                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3979                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3980                 set_store(proj_m);
3981                 return;
3982         }
3983         case IR_INITIALIZER_TARVAL: {
3984                 tarval  *tv       = get_initializer_tarval_value(initializer);
3985                 ir_mode *mode     = get_tarval_mode(tv);
3986                 ir_node *cnst     = new_d_Const(dbgi, tv);
3987                 ir_type *ent_type = get_entity_type(entity);
3988
3989                 /* is it a bitfield type? */
3990                 if (is_Primitive_type(ent_type) &&
3991                                 get_primitive_base_type(ent_type) != NULL) {
3992                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3993                         return;
3994                 }
3995
3996                 assert(get_type_mode(type) == mode);
3997                 ir_node *mem    = get_store();
3998                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3999                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4000                 set_store(proj_m);
4001                 return;
4002         }
4003         case IR_INITIALIZER_COMPOUND: {
4004                 assert(is_compound_type(type));
4005                 int n_members;
4006                 if (is_Array_type(type)) {
4007                         assert(has_array_upper_bound(type, 0));
4008                         n_members = get_array_upper_bound_int(type, 0);
4009                 } else {
4010                         n_members = get_compound_n_members(type);
4011                 }
4012
4013                 if (get_initializer_compound_n_entries(initializer)
4014                                 != (unsigned) n_members)
4015                         panic("initializer doesn't match compound type");
4016
4017                 for (int i = 0; i < n_members; ++i) {
4018                         ir_node   *addr;
4019                         ir_type   *irtype;
4020                         ir_entity *sub_entity;
4021                         if (is_Array_type(type)) {
4022                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4023                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4024                                 ir_node   *in[1]    = { cnst };
4025                                 irtype     = get_array_element_type(type);
4026                                 sub_entity = get_array_element_entity(type);
4027                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4028                                                        sub_entity);
4029                         } else {
4030                                 sub_entity = get_compound_member(type, i);
4031                                 irtype     = get_entity_type(sub_entity);
4032                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4033                                                              sub_entity);
4034                         }
4035
4036                         ir_initializer_t *sub_init
4037                                 = get_initializer_compound_value(initializer, i);
4038
4039                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4040                                                        addr);
4041                 }
4042                 return;
4043         }
4044         }
4045
4046         panic("invalid IR_INITIALIZER found");
4047 }
4048
4049 static void create_dynamic_initializer(ir_initializer_t *initializer,
4050                 dbg_info *dbgi, ir_entity *entity)
4051 {
4052         ir_node *frame     = get_local_frame(entity);
4053         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4054         ir_type *type      = get_entity_type(entity);
4055
4056         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4057 }
4058
4059 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4060                                      ir_entity *entity, type_t *type)
4061 {
4062         ir_node *memory = get_store();
4063         ir_node *nomem  = new_NoMem();
4064         ir_node *frame  = get_irg_frame(current_ir_graph);
4065         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4066
4067         if (initializer->kind == INITIALIZER_VALUE) {
4068                 initializer_value_t *initializer_value = &initializer->value;
4069
4070                 ir_node *value = expression_to_firm(initializer_value->value);
4071                 type = skip_typeref(type);
4072                 assign_value(dbgi, addr, type, value);
4073                 return;
4074         }
4075
4076         if (!is_constant_initializer(initializer)) {
4077                 ir_initializer_t *irinitializer
4078                         = create_ir_initializer(initializer, type);
4079
4080                 create_dynamic_initializer(irinitializer, dbgi, entity);
4081                 return;
4082         }
4083
4084         /* create the ir_initializer */
4085         ir_graph *const old_current_ir_graph = current_ir_graph;
4086         current_ir_graph = get_const_code_irg();
4087
4088         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4089
4090         assert(current_ir_graph == get_const_code_irg());
4091         current_ir_graph = old_current_ir_graph;
4092
4093         /* create a "template" entity which is copied to the entity on the stack */
4094         ident     *const id          = id_unique("initializer.%u");
4095         ir_type   *const irtype      = get_ir_type(type);
4096         ir_type   *const global_type = get_glob_type();
4097         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4098         set_entity_ld_ident(init_entity, id);
4099
4100         set_entity_variability(init_entity, variability_initialized);
4101         set_entity_visibility(init_entity, visibility_local);
4102         set_entity_allocation(init_entity, allocation_static);
4103
4104         set_entity_initializer(init_entity, irinitializer);
4105
4106         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4107         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4108
4109         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4110         set_store(copyb_mem);
4111 }
4112
4113 static void create_initializer_local_variable_entity(entity_t *entity)
4114 {
4115         assert(entity->kind == ENTITY_VARIABLE);
4116         initializer_t *initializer = entity->variable.initializer;
4117         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4118         ir_entity     *irentity    = entity->variable.v.entity;
4119         type_t        *type        = entity->declaration.type;
4120
4121         type = get_aligned_type(type, entity->variable.alignment);
4122         create_local_initializer(initializer, dbgi, irentity, type);
4123 }
4124
4125 static void create_variable_initializer(entity_t *entity)
4126 {
4127         assert(entity->kind == ENTITY_VARIABLE);
4128         initializer_t *initializer = entity->variable.initializer;
4129         if (initializer == NULL)
4130                 return;
4131
4132         declaration_kind_t declaration_kind
4133                 = (declaration_kind_t) entity->declaration.kind;
4134         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4135                 create_initializer_local_variable_entity(entity);
4136                 return;
4137         }
4138
4139         type_t            *type = entity->declaration.type;
4140         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4141
4142         if (initializer->kind == INITIALIZER_VALUE) {
4143                 initializer_value_t *initializer_value = &initializer->value;
4144                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4145
4146                 ir_node *value = expression_to_firm(initializer_value->value);
4147
4148                 type_t  *type = initializer_value->value->base.type;
4149                 ir_mode *mode = get_ir_mode_storage(type);
4150                 value = create_conv(dbgi, value, mode);
4151                 value = do_strict_conv(dbgi, value);
4152
4153                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4154                         set_value(entity->variable.v.value_number, value);
4155                 } else {
4156                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4157
4158                         ir_entity *irentity = entity->variable.v.entity;
4159
4160                         if (tq & TYPE_QUALIFIER_CONST) {
4161                                 set_entity_variability(irentity, variability_constant);
4162                         } else {
4163                                 set_entity_variability(irentity, variability_initialized);
4164                         }
4165                         set_atomic_ent_value(irentity, value);
4166                 }
4167         } else {
4168                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4169                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4170
4171                 ir_entity        *irentity        = entity->variable.v.entity;
4172                 ir_initializer_t *irinitializer
4173                         = create_ir_initializer(initializer, type);
4174
4175                 if (tq & TYPE_QUALIFIER_CONST) {
4176                         set_entity_variability(irentity, variability_constant);
4177                 } else {
4178                         set_entity_variability(irentity, variability_initialized);
4179                 }
4180                 set_entity_initializer(irentity, irinitializer);
4181         }
4182 }
4183
4184 static void create_variable_length_array(entity_t *entity)
4185 {
4186         assert(entity->kind == ENTITY_VARIABLE);
4187         assert(entity->variable.initializer == NULL);
4188
4189         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4190         entity->variable.v.vla_base = NULL;
4191
4192         /* TODO: record VLA somewhere so we create the free node when we leave
4193          * it's scope */
4194 }
4195
4196 static void allocate_variable_length_array(entity_t *entity)
4197 {
4198         assert(entity->kind == ENTITY_VARIABLE);
4199         assert(entity->variable.initializer == NULL);
4200         assert(get_cur_block() != NULL);
4201
4202         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4203         type_t   *type      = entity->declaration.type;
4204         ir_type  *el_type   = get_ir_type(type->array.element_type);
4205
4206         /* make sure size_node is calculated */
4207         get_type_size(type);
4208         ir_node  *elems = type->array.size_node;
4209         ir_node  *mem   = get_store();
4210         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4211
4212         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4213         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4214         set_store(proj_m);
4215
4216         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4217         entity->variable.v.vla_base = addr;
4218 }
4219
4220 /**
4221  * Creates a Firm local variable from a declaration.
4222  */
4223 static void create_local_variable(entity_t *entity)
4224 {
4225         assert(entity->kind == ENTITY_VARIABLE);
4226         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4227
4228         bool needs_entity = entity->variable.address_taken;
4229         type_t *type = skip_typeref(entity->declaration.type);
4230
4231         /* is it a variable length array? */
4232         if (is_type_array(type) && !type->array.size_constant) {
4233                 create_variable_length_array(entity);
4234                 return;
4235         } else if (is_type_array(type) || is_type_compound(type)) {
4236                 needs_entity = true;
4237         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4238                 needs_entity = true;
4239         }
4240
4241         if (needs_entity) {
4242                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4243                 create_variable_entity(entity,
4244                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4245                                        frame_type);
4246         } else {
4247                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4248                 entity->variable.v.value_number = next_value_number_function;
4249                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4250                                         entity);
4251                 ++next_value_number_function;
4252         }
4253 }
4254
4255 static void create_local_static_variable(entity_t *entity)
4256 {
4257         assert(entity->kind == ENTITY_VARIABLE);
4258         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4259
4260         type_t    *type = skip_typeref(entity->declaration.type);
4261         type            = get_aligned_type(type, entity->variable.alignment);
4262
4263         ir_type   *const var_type = entity->variable.thread_local ?
4264                 get_tls_type() : get_glob_type();
4265         ir_type   *const irtype   = get_ir_type(type);
4266         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4267
4268         size_t l = strlen(entity->base.symbol->string);
4269         char   buf[l + sizeof(".%u")];
4270         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4271         ident     *const id = id_unique(buf);
4272
4273         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4274
4275         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4276                 set_entity_volatility(irentity, volatility_is_volatile);
4277         }
4278
4279         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4280         entity->variable.v.entity = irentity;
4281
4282         set_entity_ld_ident(irentity, id);
4283         set_entity_variability(irentity, variability_uninitialized);
4284         set_entity_visibility(irentity, visibility_local);
4285         set_entity_allocation(irentity, entity->variable.thread_local ?
4286                 allocation_automatic : allocation_static);
4287
4288         ir_graph *const old_current_ir_graph = current_ir_graph;
4289         current_ir_graph = get_const_code_irg();
4290
4291         create_variable_initializer(entity);
4292
4293         assert(current_ir_graph == get_const_code_irg());
4294         current_ir_graph = old_current_ir_graph;
4295 }
4296
4297
4298
4299 static void return_statement_to_firm(return_statement_t *statement)
4300 {
4301         if (get_cur_block() == NULL)
4302                 return;
4303
4304         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4305         type_t   *type        = current_function_entity->declaration.type;
4306         ir_type  *func_irtype = get_ir_type(type);
4307
4308
4309         ir_node *in[1];
4310         int      in_len;
4311         if (get_method_n_ress(func_irtype) > 0) {
4312                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4313
4314                 if (statement->value != NULL) {
4315                         ir_node *node = expression_to_firm(statement->value);
4316                         if (!is_compound_type(res_type)) {
4317                                 type_t  *type = statement->value->base.type;
4318                                 ir_mode *mode = get_ir_mode_storage(type);
4319                                 node          = create_conv(dbgi, node, mode);
4320                                 node          = do_strict_conv(dbgi, node);
4321                         }
4322                         in[0] = node;
4323                 } else {
4324                         ir_mode *mode;
4325                         if (is_compound_type(res_type)) {
4326                                 mode = mode_P_data;
4327                         } else {
4328                                 mode = get_type_mode(res_type);
4329                         }
4330                         in[0] = new_Unknown(mode);
4331                 }
4332                 in_len = 1;
4333         } else {
4334                 /* build return_value for its side effects */
4335                 if (statement->value != NULL) {
4336                         expression_to_firm(statement->value);
4337                 }
4338                 in_len = 0;
4339         }
4340
4341         ir_node  *store = get_store();
4342         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4343
4344         ir_node *end_block = get_irg_end_block(current_ir_graph);
4345         add_immBlock_pred(end_block, ret);
4346
4347         set_cur_block(NULL);
4348 }
4349
4350 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4351 {
4352         if (get_cur_block() == NULL)
4353                 return NULL;
4354
4355         return expression_to_firm(statement->expression);
4356 }
4357
4358 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4359 {
4360         entity_t *entity = compound->scope.entities;
4361         for ( ; entity != NULL; entity = entity->base.next) {
4362                 if (!is_declaration(entity))
4363                         continue;
4364
4365                 create_local_declaration(entity);
4366         }
4367
4368         ir_node     *result    = NULL;
4369         statement_t *statement = compound->statements;
4370         for ( ; statement != NULL; statement = statement->base.next) {
4371                 if (statement->base.next == NULL
4372                                 && statement->kind == STATEMENT_EXPRESSION) {
4373                         result = expression_statement_to_firm(
4374                                         &statement->expression);
4375                         break;
4376                 }
4377                 statement_to_firm(statement);
4378         }
4379
4380         return result;
4381 }
4382
4383 static void create_global_variable(entity_t *entity)
4384 {
4385         assert(entity->kind == ENTITY_VARIABLE);
4386
4387         ir_visibility vis;
4388         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4389                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4390                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4391                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4392
4393                 default: panic("Invalid storage class for global variable");
4394         }
4395
4396         ir_type *var_type = entity->variable.thread_local ?
4397                 get_tls_type() : get_glob_type();
4398         create_variable_entity(entity,
4399                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4400         set_entity_visibility(entity->variable.v.entity, vis);
4401 }
4402
4403 static void create_local_declaration(entity_t *entity)
4404 {
4405         assert(is_declaration(entity));
4406
4407         /* construct type */
4408         (void) get_ir_type(entity->declaration.type);
4409         if (entity->base.symbol == NULL) {
4410                 return;
4411         }
4412
4413         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4414         case STORAGE_CLASS_STATIC:
4415                 create_local_static_variable(entity);
4416                 return;
4417         case STORAGE_CLASS_EXTERN:
4418                 if (entity->kind == ENTITY_FUNCTION) {
4419                         assert(entity->function.statement == NULL);
4420                         get_function_entity(entity);
4421                 } else {
4422                         create_global_variable(entity);
4423                         create_variable_initializer(entity);
4424                 }
4425                 return;
4426         case STORAGE_CLASS_NONE:
4427         case STORAGE_CLASS_AUTO:
4428         case STORAGE_CLASS_REGISTER:
4429                 if (entity->kind == ENTITY_FUNCTION) {
4430                         if (entity->function.statement != NULL) {
4431                                 get_function_entity(entity);
4432                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4433                                 enqueue_inner_function(entity);
4434                         } else {
4435                                 get_function_entity(entity);
4436                         }
4437                 } else {
4438                         create_local_variable(entity);
4439                 }
4440                 return;
4441         case STORAGE_CLASS_TYPEDEF:
4442                 break;
4443         }
4444         panic("invalid storage class found");
4445 }
4446
4447 static void initialize_local_declaration(entity_t *entity)
4448 {
4449         if (entity->base.symbol == NULL)
4450                 return;
4451
4452         switch ((declaration_kind_t) entity->declaration.kind) {
4453         case DECLARATION_KIND_LOCAL_VARIABLE:
4454         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4455                 create_variable_initializer(entity);
4456                 return;
4457
4458         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4459                 allocate_variable_length_array(entity);
4460                 return;
4461
4462         case DECLARATION_KIND_COMPOUND_MEMBER:
4463         case DECLARATION_KIND_GLOBAL_VARIABLE:
4464         case DECLARATION_KIND_FUNCTION:
4465         case DECLARATION_KIND_INNER_FUNCTION:
4466                 return;
4467
4468         case DECLARATION_KIND_PARAMETER:
4469         case DECLARATION_KIND_PARAMETER_ENTITY:
4470                 panic("can't initialize parameters");
4471
4472         case DECLARATION_KIND_UNKNOWN:
4473                 panic("can't initialize unknown declaration");
4474         }
4475         panic("invalid declaration kind");
4476 }
4477
4478 static void declaration_statement_to_firm(declaration_statement_t *statement)
4479 {
4480         entity_t *entity = statement->declarations_begin;
4481         if (entity == NULL)
4482                 return;
4483
4484         entity_t *const last = statement->declarations_end;
4485         for ( ;; entity = entity->base.next) {
4486                 if (is_declaration(entity)) {
4487                         initialize_local_declaration(entity);
4488                 } else if (entity->kind == ENTITY_TYPEDEF) {
4489                         type_t *const type = skip_typeref(entity->typedefe.type);
4490                         if (is_type_array(type) && type->array.is_vla)
4491                                 get_vla_size(&type->array);
4492                 }
4493                 if (entity == last)
4494                         break;
4495         }
4496 }
4497
4498 static void if_statement_to_firm(if_statement_t *statement)
4499 {
4500         ir_node *cur_block = get_cur_block();
4501
4502         ir_node *fallthrough_block = NULL;
4503
4504         /* the true (blocks) */
4505         ir_node *true_block = NULL;
4506         if (statement->true_statement != NULL) {
4507                 true_block = new_immBlock();
4508                 set_cur_block(true_block);
4509                 statement_to_firm(statement->true_statement);
4510                 if (get_cur_block() != NULL) {
4511                         ir_node *jmp = new_Jmp();
4512                         if (fallthrough_block == NULL)
4513                                 fallthrough_block = new_immBlock();
4514                         add_immBlock_pred(fallthrough_block, jmp);
4515                 }
4516         }
4517
4518         /* the false (blocks) */
4519         ir_node *false_block = NULL;
4520         if (statement->false_statement != NULL) {
4521                 false_block = new_immBlock();
4522                 set_cur_block(false_block);
4523
4524                 statement_to_firm(statement->false_statement);
4525                 if (get_cur_block() != NULL) {
4526                         ir_node *jmp = new_Jmp();
4527                         if (fallthrough_block == NULL)
4528                                 fallthrough_block = new_immBlock();
4529                         add_immBlock_pred(fallthrough_block, jmp);
4530                 }
4531         }
4532
4533         /* create the condition */
4534         if (cur_block != NULL) {
4535                 if (true_block == NULL || false_block == NULL) {
4536                         if (fallthrough_block == NULL)
4537                                 fallthrough_block = new_immBlock();
4538                         if (true_block == NULL)
4539                                 true_block = fallthrough_block;
4540                         if (false_block == NULL)
4541                                 false_block = fallthrough_block;
4542                 }
4543
4544                 set_cur_block(cur_block);
4545                 create_condition_evaluation(statement->condition, true_block,
4546                                             false_block);
4547         }
4548
4549         mature_immBlock(true_block);
4550         if (false_block != fallthrough_block && false_block != NULL) {
4551                 mature_immBlock(false_block);
4552         }
4553         if (fallthrough_block != NULL) {
4554                 mature_immBlock(fallthrough_block);
4555         }
4556
4557         set_cur_block(fallthrough_block);
4558 }
4559
4560 static void while_statement_to_firm(while_statement_t *statement)
4561 {
4562         ir_node *jmp = NULL;
4563         if (get_cur_block() != NULL) {
4564                 jmp = new_Jmp();
4565         }
4566
4567         /* create the header block */
4568         ir_node *header_block = new_immBlock();
4569         if (jmp != NULL) {
4570                 add_immBlock_pred(header_block, jmp);
4571         }
4572
4573         /* the loop body */
4574         ir_node *old_continue_label = continue_label;
4575         ir_node *old_break_label    = break_label;
4576         continue_label              = header_block;
4577         break_label                 = NULL;
4578
4579         ir_node *body_block = new_immBlock();
4580         set_cur_block(body_block);
4581         statement_to_firm(statement->body);
4582         ir_node *false_block = break_label;
4583
4584         assert(continue_label == header_block);
4585         continue_label = old_continue_label;
4586         break_label    = old_break_label;
4587
4588         if (get_cur_block() != NULL) {
4589                 jmp = new_Jmp();
4590                 add_immBlock_pred(header_block, jmp);
4591         }
4592
4593         /* shortcut for while(true) */
4594         if (is_constant_expression(statement->condition)
4595                         && fold_constant(statement->condition) != 0) {
4596                 set_cur_block(header_block);
4597                 ir_node *header_jmp = new_Jmp();
4598                 add_immBlock_pred(body_block, header_jmp);
4599
4600                 keep_alive(body_block);
4601                 keep_all_memory(body_block);
4602                 set_cur_block(body_block);
4603         } else {
4604                 if (false_block == NULL) {
4605                         false_block = new_immBlock();
4606                 }
4607
4608                 /* create the condition */
4609                 set_cur_block(header_block);
4610
4611                 create_condition_evaluation(statement->condition, body_block,
4612                                             false_block);
4613         }
4614
4615         mature_immBlock(body_block);
4616         mature_immBlock(header_block);
4617         if (false_block != NULL) {
4618                 mature_immBlock(false_block);
4619         }
4620
4621         set_cur_block(false_block);
4622 }
4623
4624 static void do_while_statement_to_firm(do_while_statement_t *statement)
4625 {
4626         ir_node *jmp = NULL;
4627         if (get_cur_block() != NULL) {
4628                 jmp = new_Jmp();
4629         }
4630
4631         /* create the header block */
4632         ir_node *header_block = new_immBlock();
4633
4634         /* the loop body */
4635         ir_node *body_block = new_immBlock();
4636         if (jmp != NULL) {
4637                 add_immBlock_pred(body_block, jmp);
4638         }
4639
4640         ir_node *old_continue_label = continue_label;
4641         ir_node *old_break_label    = break_label;
4642         continue_label              = header_block;
4643         break_label                 = NULL;
4644
4645         set_cur_block(body_block);
4646         statement_to_firm(statement->body);
4647         ir_node *false_block = break_label;
4648
4649         assert(continue_label == header_block);
4650         continue_label = old_continue_label;
4651         break_label    = old_break_label;
4652
4653         if (get_cur_block() != NULL) {
4654                 ir_node *body_jmp = new_Jmp();
4655                 add_immBlock_pred(header_block, body_jmp);
4656                 mature_immBlock(header_block);
4657         }
4658
4659         if (false_block == NULL) {
4660                 false_block = new_immBlock();
4661         }
4662
4663         /* create the condition */
4664         set_cur_block(header_block);
4665
4666         create_condition_evaluation(statement->condition, body_block, false_block);
4667         mature_immBlock(body_block);
4668         mature_immBlock(header_block);
4669         mature_immBlock(false_block);
4670
4671         set_cur_block(false_block);
4672 }
4673
4674 static void for_statement_to_firm(for_statement_t *statement)
4675 {
4676         ir_node *jmp = NULL;
4677
4678         /* create declarations */
4679         entity_t *entity = statement->scope.entities;
4680         for ( ; entity != NULL; entity = entity->base.next) {
4681                 if (!is_declaration(entity))
4682                         continue;
4683
4684                 create_local_declaration(entity);
4685         }
4686
4687         if (get_cur_block() != NULL) {
4688                 entity = statement->scope.entities;
4689                 for ( ; entity != NULL; entity = entity->base.next) {
4690                         if (!is_declaration(entity))
4691                                 continue;
4692
4693                         initialize_local_declaration(entity);
4694                 }
4695
4696                 if (statement->initialisation != NULL) {
4697                         expression_to_firm(statement->initialisation);
4698                 }
4699
4700                 jmp = new_Jmp();
4701         }
4702
4703
4704         /* create the step block */
4705         ir_node *const step_block = new_immBlock();
4706         set_cur_block(step_block);
4707         if (statement->step != NULL) {
4708                 expression_to_firm(statement->step);
4709         }
4710         ir_node *const step_jmp = new_Jmp();
4711
4712         /* create the header block */
4713         ir_node *const header_block = new_immBlock();
4714         set_cur_block(header_block);
4715         if (jmp != NULL) {
4716                 add_immBlock_pred(header_block, jmp);
4717         }
4718         add_immBlock_pred(header_block, step_jmp);
4719
4720         /* the false block */
4721         ir_node *const false_block = new_immBlock();
4722
4723         /* the loop body */
4724         ir_node *body_block;
4725         if (statement->body != NULL) {
4726                 ir_node *const old_continue_label = continue_label;
4727                 ir_node *const old_break_label    = break_label;
4728                 continue_label = step_block;
4729                 break_label    = false_block;
4730
4731                 body_block = new_immBlock();
4732                 set_cur_block(body_block);
4733                 statement_to_firm(statement->body);
4734
4735                 assert(continue_label == step_block);
4736                 assert(break_label    == false_block);
4737                 continue_label = old_continue_label;
4738                 break_label    = old_break_label;
4739
4740                 if (get_cur_block() != NULL) {
4741                         jmp = new_Jmp();
4742                         add_immBlock_pred(step_block, jmp);
4743                 }
4744         } else {
4745                 body_block = step_block;
4746         }
4747
4748         /* create the condition */
4749         set_cur_block(header_block);
4750         if (statement->condition != NULL) {
4751                 create_condition_evaluation(statement->condition, body_block,
4752                                             false_block);
4753         } else {
4754                 keep_alive(header_block);
4755                 keep_all_memory(header_block);
4756                 jmp = new_Jmp();
4757                 add_immBlock_pred(body_block, jmp);
4758         }
4759
4760         mature_immBlock(body_block);
4761         mature_immBlock(false_block);
4762         mature_immBlock(step_block);
4763         mature_immBlock(header_block);
4764         mature_immBlock(false_block);
4765
4766         set_cur_block(false_block);
4767 }
4768
4769 static void create_jump_statement(const statement_t *statement,
4770                                   ir_node *target_block)
4771 {
4772         if (get_cur_block() == NULL)
4773                 return;
4774
4775         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4776         ir_node  *jump = new_d_Jmp(dbgi);
4777         add_immBlock_pred(target_block, jump);
4778
4779         set_cur_block(NULL);
4780 }
4781
4782 static ir_node *get_break_label(void)
4783 {
4784         if (break_label == NULL) {
4785                 break_label = new_immBlock();
4786         }
4787         return break_label;
4788 }
4789
4790 static void switch_statement_to_firm(switch_statement_t *statement)
4791 {
4792         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4793
4794         ir_node *expression  = expression_to_firm(statement->expression);
4795         ir_node *cond        = new_d_Cond(dbgi, expression);
4796
4797         set_cur_block(NULL);
4798
4799         ir_node *const old_switch_cond       = current_switch_cond;
4800         ir_node *const old_break_label       = break_label;
4801         const bool     old_saw_default_label = saw_default_label;
4802         saw_default_label                    = false;
4803         current_switch_cond                  = cond;
4804         break_label                          = NULL;
4805         switch_statement_t *const old_switch = current_switch;
4806         current_switch                       = statement;
4807
4808         /* determine a free number for the default label */
4809         unsigned long num_cases = 0;
4810         long def_nr = 0;
4811         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4812                 if (l->expression == NULL) {
4813                         /* default case */
4814                         continue;
4815                 }
4816                 if (l->last_case >= l->first_case)
4817                         num_cases += l->last_case - l->first_case + 1;
4818                 if (l->last_case > def_nr)
4819                         def_nr = l->last_case;
4820         }
4821
4822         if (def_nr == INT_MAX) {
4823                 /* Bad: an overflow will occurr, we cannot be sure that the
4824                  * maximum + 1 is a free number. Scan the values a second
4825                  * time to find a free number.
4826                  */
4827                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4828
4829                 memset(bits, 0, (num_cases + 7) >> 3);
4830                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4831                         if (l->expression == NULL) {
4832                                 /* default case */
4833                                 continue;
4834                         }
4835                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4836                         if (start < num_cases && l->last_case >= 0) {
4837                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4838                                         (unsigned long)l->last_case : num_cases - 1;
4839                                 for (unsigned long cns = start; cns <= end; ++cns) {
4840                                         bits[cns >> 3] |= (1 << (cns & 7));
4841                                 }
4842                         }
4843                 }
4844                 /* We look at the first num_cases constants:
4845                  * Either they are densed, so we took the last (num_cases)
4846                  * one, or they are non densed, so we will find one free
4847                  * there...
4848                  */
4849                 unsigned long i;
4850                 for (i = 0; i < num_cases; ++i)
4851                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4852                                 break;
4853
4854                 free(bits);
4855                 def_nr = i;
4856         } else {
4857                 ++def_nr;
4858         }
4859         statement->default_proj_nr = def_nr;
4860
4861         if (statement->body != NULL) {
4862                 statement_to_firm(statement->body);
4863         }
4864
4865         if (get_cur_block() != NULL) {
4866                 ir_node *jmp = new_Jmp();
4867                 add_immBlock_pred(get_break_label(), jmp);
4868         }
4869
4870         if (!saw_default_label) {
4871                 set_cur_block(get_nodes_block(cond));
4872                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4873                                                         statement->default_proj_nr);
4874                 add_immBlock_pred(get_break_label(), proj);
4875         }
4876
4877         if (break_label != NULL) {
4878                 mature_immBlock(break_label);
4879         }
4880         set_cur_block(break_label);
4881
4882         assert(current_switch_cond == cond);
4883         current_switch      = old_switch;
4884         current_switch_cond = old_switch_cond;
4885         break_label         = old_break_label;
4886         saw_default_label   = old_saw_default_label;
4887 }
4888
4889 static void case_label_to_firm(const case_label_statement_t *statement)
4890 {
4891         if (statement->is_empty_range)
4892                 return;
4893
4894         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4895
4896         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4897
4898         ir_node *proj;
4899         ir_node *block     = new_immBlock();
4900
4901         set_cur_block(get_nodes_block(current_switch_cond));
4902         if (statement->expression != NULL) {
4903                 long pn     = statement->first_case;
4904                 long end_pn = statement->last_case;
4905                 assert(pn <= end_pn);
4906                 /* create jumps for all cases in the given range */
4907                 do {
4908                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4909                         add_immBlock_pred(block, proj);
4910                 } while(pn++ < end_pn);
4911         } else {
4912                 saw_default_label = true;
4913                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4914                                          current_switch->default_proj_nr);
4915
4916                 add_immBlock_pred(block, proj);
4917         }
4918
4919         if (fallthrough != NULL) {
4920                 add_immBlock_pred(block, fallthrough);
4921         }
4922         mature_immBlock(block);
4923         set_cur_block(block);
4924
4925         if (statement->statement != NULL) {
4926                 statement_to_firm(statement->statement);
4927         }
4928 }
4929
4930 static void label_to_firm(const label_statement_t *statement)
4931 {
4932         ir_node *block = get_label_block(statement->label);
4933
4934         if (get_cur_block() != NULL) {
4935                 ir_node *jmp = new_Jmp();
4936                 add_immBlock_pred(block, jmp);
4937         }
4938
4939         set_cur_block(block);
4940         keep_alive(block);
4941         keep_all_memory(block);
4942
4943         if (statement->statement != NULL) {
4944                 statement_to_firm(statement->statement);
4945         }
4946 }
4947
4948 static void goto_to_firm(const goto_statement_t *statement)
4949 {
4950         if (get_cur_block() == NULL)
4951                 return;
4952
4953         if (statement->expression) {
4954                 ir_node  *irn  = expression_to_firm(statement->expression);
4955                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4956                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4957
4958                 set_irn_link(ijmp, ijmp_list);
4959                 ijmp_list = ijmp;
4960         } else {
4961                 ir_node *block = get_label_block(statement->label);
4962                 ir_node *jmp   = new_Jmp();
4963                 add_immBlock_pred(block, jmp);
4964         }
4965         set_cur_block(NULL);
4966 }
4967
4968 static void asm_statement_to_firm(const asm_statement_t *statement)
4969 {
4970         bool needs_memory = false;
4971
4972         if (statement->is_volatile) {
4973                 needs_memory = true;
4974         }
4975
4976         size_t         n_clobbers = 0;
4977         asm_clobber_t *clobber    = statement->clobbers;
4978         for ( ; clobber != NULL; clobber = clobber->next) {
4979                 const char *clobber_str = clobber->clobber.begin;
4980
4981                 if (!be_is_valid_clobber(clobber_str)) {
4982                         errorf(&statement->base.source_position,
4983                                    "invalid clobber '%s' specified", clobber->clobber);
4984                         continue;
4985                 }
4986
4987                 if (strcmp(clobber_str, "memory") == 0) {
4988                         needs_memory = true;
4989                         continue;
4990                 }
4991
4992                 ident *id = new_id_from_str(clobber_str);
4993                 obstack_ptr_grow(&asm_obst, id);
4994                 ++n_clobbers;
4995         }
4996         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4997         ident **clobbers = NULL;
4998         if (n_clobbers > 0) {
4999                 clobbers = obstack_finish(&asm_obst);
5000         }
5001
5002         size_t n_inputs  = 0;
5003         asm_argument_t *argument = statement->inputs;
5004         for ( ; argument != NULL; argument = argument->next)
5005                 n_inputs++;
5006         size_t n_outputs = 0;
5007         argument = statement->outputs;
5008         for ( ; argument != NULL; argument = argument->next)
5009                 n_outputs++;
5010
5011         unsigned next_pos = 0;
5012
5013         ir_node *ins[n_inputs + n_outputs + 1];
5014         size_t   in_size = 0;
5015
5016         ir_asm_constraint tmp_in_constraints[n_outputs];
5017
5018         const expression_t *out_exprs[n_outputs];
5019         ir_node            *out_addrs[n_outputs];
5020         size_t              out_size = 0;
5021
5022         argument = statement->outputs;
5023         for ( ; argument != NULL; argument = argument->next) {
5024                 const char *constraints = argument->constraints.begin;
5025                 asm_constraint_flags_t asm_flags
5026                         = be_parse_asm_constraints(constraints);
5027
5028                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5029                         warningf(&statement->base.source_position,
5030                                "some constraints in '%s' are not supported", constraints);
5031                 }
5032                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5033                         errorf(&statement->base.source_position,
5034                                "some constraints in '%s' are invalid", constraints);
5035                         continue;
5036                 }
5037                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5038                         errorf(&statement->base.source_position,
5039                                "no write flag specified for output constraints '%s'",
5040                                constraints);
5041                         continue;
5042                 }
5043
5044                 unsigned pos = next_pos++;
5045                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5046                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5047                         expression_t *expr = argument->expression;
5048                         ir_node      *addr = expression_to_addr(expr);
5049                         /* in+output, construct an artifical same_as constraint on the
5050                          * input */
5051                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5052                                 char     buf[64];
5053                                 ir_node *value = get_value_from_lvalue(expr, addr);
5054
5055                                 snprintf(buf, sizeof(buf), "%u", pos);
5056
5057                                 ir_asm_constraint constraint;
5058                                 constraint.pos              = pos;
5059                                 constraint.constraint       = new_id_from_str(buf);
5060                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5061                                 tmp_in_constraints[in_size] = constraint;
5062                                 ins[in_size] = value;
5063
5064                                 ++in_size;
5065                         }
5066
5067                         out_exprs[out_size] = expr;
5068                         out_addrs[out_size] = addr;
5069                         ++out_size;
5070                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5071                         /* pure memory ops need no input (but we have to make sure we
5072                          * attach to the memory) */
5073                         assert(! (asm_flags &
5074                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5075                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5076                         needs_memory = true;
5077
5078                         /* we need to attach the address to the inputs */
5079                         expression_t *expr = argument->expression;
5080
5081                         ir_asm_constraint constraint;
5082                         constraint.pos              = pos;
5083                         constraint.constraint       = new_id_from_str(constraints);
5084                         constraint.mode             = NULL;
5085                         tmp_in_constraints[in_size] = constraint;
5086
5087                         ins[in_size]          = expression_to_addr(expr);
5088                         ++in_size;
5089                         continue;
5090                 } else {
5091                         errorf(&statement->base.source_position,
5092                                "only modifiers but no place set in constraints '%s'",
5093                                constraints);
5094                         continue;
5095                 }
5096
5097                 ir_asm_constraint constraint;
5098                 constraint.pos        = pos;
5099                 constraint.constraint = new_id_from_str(constraints);
5100                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5101
5102                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5103         }
5104         assert(obstack_object_size(&asm_obst)
5105                         == out_size * sizeof(ir_asm_constraint));
5106         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5107
5108
5109         obstack_grow(&asm_obst, tmp_in_constraints,
5110                      in_size * sizeof(tmp_in_constraints[0]));
5111         /* find and count input and output arguments */
5112         argument = statement->inputs;
5113         for ( ; argument != NULL; argument = argument->next) {
5114                 const char *constraints = argument->constraints.begin;
5115                 asm_constraint_flags_t asm_flags
5116                         = be_parse_asm_constraints(constraints);
5117
5118                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5119                         errorf(&statement->base.source_position,
5120                                "some constraints in '%s' are not supported", constraints);
5121                         continue;
5122                 }
5123                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5124                         errorf(&statement->base.source_position,
5125                                "some constraints in '%s' are invalid", constraints);
5126                         continue;
5127                 }
5128                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5129                         errorf(&statement->base.source_position,
5130                                "write flag specified for input constraints '%s'",
5131                                constraints);
5132                         continue;
5133                 }
5134
5135                 ir_node *input;
5136                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5137                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5138                         /* we can treat this as "normal" input */
5139                         input = expression_to_firm(argument->expression);
5140                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5141                         /* pure memory ops need no input (but we have to make sure we
5142                          * attach to the memory) */
5143                         assert(! (asm_flags &
5144                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5145                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5146                         needs_memory = true;
5147                         input = expression_to_addr(argument->expression);
5148                 } else {
5149                         errorf(&statement->base.source_position,
5150                                "only modifiers but no place set in constraints '%s'",
5151                                constraints);
5152                         continue;
5153                 }
5154
5155                 ir_asm_constraint constraint;
5156                 constraint.pos        = next_pos++;
5157                 constraint.constraint = new_id_from_str(constraints);
5158                 constraint.mode       = get_irn_mode(input);
5159
5160                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5161                 ins[in_size++] = input;
5162         }
5163
5164         if (needs_memory) {
5165                 ir_asm_constraint constraint;
5166                 constraint.pos        = next_pos++;
5167                 constraint.constraint = new_id_from_str("");
5168                 constraint.mode       = mode_M;
5169
5170                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5171                 ins[in_size++] = get_store();
5172         }
5173
5174         assert(obstack_object_size(&asm_obst)
5175                         == in_size * sizeof(ir_asm_constraint));
5176         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5177
5178         /* create asm node */
5179         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5180
5181         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5182
5183         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5184                                   out_size, output_constraints,
5185                                   n_clobbers, clobbers, asm_text);
5186
5187         if (statement->is_volatile) {
5188                 set_irn_pinned(node, op_pin_state_pinned);
5189         } else {
5190                 set_irn_pinned(node, op_pin_state_floats);
5191         }
5192
5193         /* create output projs & connect them */
5194         if (needs_memory) {
5195                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5196                 set_store(projm);
5197         }
5198
5199         size_t i;
5200         for (i = 0; i < out_size; ++i) {
5201                 const expression_t *out_expr = out_exprs[i];
5202                 long                pn       = i;
5203                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5204                 ir_node            *proj     = new_Proj(node, mode, pn);
5205                 ir_node            *addr     = out_addrs[i];
5206
5207                 set_value_for_expression_addr(out_expr, proj, addr);
5208         }
5209 }
5210
5211 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5212 {
5213         statement_to_firm(statement->try_statement);
5214         warningf(&statement->base.source_position, "structured exception handling ignored");
5215 }
5216
5217 static void     leave_statement_to_firm(leave_statement_t *statement)
5218 {
5219         errorf(&statement->base.source_position, "__leave not supported yet");
5220 }
5221
5222 /**
5223  * Transform a statement.
5224  */
5225 static void statement_to_firm(statement_t *statement)
5226 {
5227 #ifndef NDEBUG
5228         assert(!statement->base.transformed);
5229         statement->base.transformed = true;
5230 #endif
5231
5232         switch (statement->kind) {
5233         case STATEMENT_INVALID:
5234                 panic("invalid statement found");
5235         case STATEMENT_EMPTY:
5236                 /* nothing */
5237                 return;
5238         case STATEMENT_COMPOUND:
5239                 compound_statement_to_firm(&statement->compound);
5240                 return;
5241         case STATEMENT_RETURN:
5242                 return_statement_to_firm(&statement->returns);
5243                 return;
5244         case STATEMENT_EXPRESSION:
5245                 expression_statement_to_firm(&statement->expression);
5246                 return;
5247         case STATEMENT_IF:
5248                 if_statement_to_firm(&statement->ifs);
5249                 return;
5250         case STATEMENT_WHILE:
5251                 while_statement_to_firm(&statement->whiles);
5252                 return;
5253         case STATEMENT_DO_WHILE:
5254                 do_while_statement_to_firm(&statement->do_while);
5255                 return;
5256         case STATEMENT_DECLARATION:
5257                 declaration_statement_to_firm(&statement->declaration);
5258                 return;
5259         case STATEMENT_BREAK:
5260                 create_jump_statement(statement, get_break_label());
5261                 return;
5262         case STATEMENT_CONTINUE:
5263                 create_jump_statement(statement, continue_label);
5264                 return;
5265         case STATEMENT_SWITCH:
5266                 switch_statement_to_firm(&statement->switchs);
5267                 return;
5268         case STATEMENT_CASE_LABEL:
5269                 case_label_to_firm(&statement->case_label);
5270                 return;
5271         case STATEMENT_FOR:
5272                 for_statement_to_firm(&statement->fors);
5273                 return;
5274         case STATEMENT_LABEL:
5275                 label_to_firm(&statement->label);
5276                 return;
5277         case STATEMENT_GOTO:
5278                 goto_to_firm(&statement->gotos);
5279                 return;
5280         case STATEMENT_ASM:
5281                 asm_statement_to_firm(&statement->asms);
5282                 return;
5283         case STATEMENT_MS_TRY:
5284                 ms_try_statement_to_firm(&statement->ms_try);
5285                 return;
5286         case STATEMENT_LEAVE:
5287                 leave_statement_to_firm(&statement->leave);
5288                 return;
5289         }
5290         panic("statement not implemented");
5291 }
5292
5293 static int count_local_variables(const entity_t *entity,
5294                                  const entity_t *const last)
5295 {
5296         int count = 0;
5297         entity_t const *const end = last != NULL ? last->base.next : NULL;
5298         for (; entity != end; entity = entity->base.next) {
5299                 type_t *type;
5300                 bool    address_taken;
5301
5302                 if (entity->kind == ENTITY_VARIABLE) {
5303                         type          = skip_typeref(entity->declaration.type);
5304                         address_taken = entity->variable.address_taken;
5305                 } else if (entity->kind == ENTITY_PARAMETER) {
5306                         type          = skip_typeref(entity->declaration.type);
5307                         address_taken = entity->parameter.address_taken;
5308                 } else {
5309                         continue;
5310                 }
5311
5312                 if (!address_taken && is_type_scalar(type))
5313                         ++count;
5314         }
5315         return count;
5316 }
5317
5318 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5319 {
5320         int *const count = env;
5321
5322         switch (stmt->kind) {
5323         case STATEMENT_DECLARATION: {
5324                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5325                 *count += count_local_variables(decl_stmt->declarations_begin,
5326                                 decl_stmt->declarations_end);
5327                 break;
5328         }
5329
5330         case STATEMENT_FOR:
5331                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5332                 break;
5333
5334         default:
5335                 break;
5336         }
5337 }
5338
5339 static int get_function_n_local_vars(entity_t *entity)
5340 {
5341         int count = 0;
5342
5343         /* count parameters */
5344         count += count_local_variables(entity->function.parameters.entities, NULL);
5345
5346         /* count local variables declared in body */
5347         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5348                         &count);
5349         return count;
5350 }
5351
5352 static void initialize_function_parameters(entity_t *entity)
5353 {
5354         assert(entity->kind == ENTITY_FUNCTION);
5355         ir_graph *irg             = current_ir_graph;
5356         ir_node  *args            = get_irg_args(irg);
5357         ir_node  *start_block     = get_irg_start_block(irg);
5358         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5359
5360         int       n         = 0;
5361         entity_t *parameter = entity->function.parameters.entities;
5362         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5363                 if (parameter->kind != ENTITY_PARAMETER)
5364                         continue;
5365
5366                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5367                 type_t *type = skip_typeref(parameter->declaration.type);
5368
5369                 bool needs_entity = parameter->parameter.address_taken;
5370                 assert(!is_type_array(type));
5371                 if (is_type_compound(type)) {
5372                         needs_entity = true;
5373                 }
5374
5375                 if (needs_entity) {
5376                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5377                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5378                         set_entity_ident(entity, id);
5379
5380                         parameter->declaration.kind
5381                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5382                         parameter->parameter.v.entity = entity;
5383                         continue;
5384                 }
5385
5386                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5387                 ir_mode *param_mode   = get_type_mode(param_irtype);
5388
5389                 long     pn    = n;
5390                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5391
5392                 ir_mode *mode = get_ir_mode_storage(type);
5393                 value = create_conv(NULL, value, mode);
5394                 value = do_strict_conv(NULL, value);
5395
5396                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5397                 parameter->parameter.v.value_number = next_value_number_function;
5398                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5399                                         parameter);
5400                 ++next_value_number_function;
5401
5402                 set_value(parameter->parameter.v.value_number, value);
5403         }
5404 }
5405
5406 /**
5407  * Handle additional decl modifiers for IR-graphs
5408  *
5409  * @param irg            the IR-graph
5410  * @param dec_modifiers  additional modifiers
5411  */
5412 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5413 {
5414         if (decl_modifiers & DM_RETURNS_TWICE) {
5415                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5416                 set_irg_additional_property(irg, mtp_property_returns_twice);
5417         }
5418         if (decl_modifiers & DM_NORETURN) {
5419                 /* TRUE if the declaration includes the Microsoft
5420                    __declspec(noreturn) specifier. */
5421                 set_irg_additional_property(irg, mtp_property_noreturn);
5422         }
5423         if (decl_modifiers & DM_NOTHROW) {
5424                 /* TRUE if the declaration includes the Microsoft
5425                    __declspec(nothrow) specifier. */
5426                 set_irg_additional_property(irg, mtp_property_nothrow);
5427         }
5428         if (decl_modifiers & DM_NAKED) {
5429                 /* TRUE if the declaration includes the Microsoft
5430                    __declspec(naked) specifier. */
5431                 set_irg_additional_property(irg, mtp_property_naked);
5432         }
5433         if (decl_modifiers & DM_FORCEINLINE) {
5434                 /* TRUE if the declaration includes the
5435                    Microsoft __forceinline specifier. */
5436                 set_irg_inline_property(irg, irg_inline_forced);
5437         }
5438         if (decl_modifiers & DM_NOINLINE) {
5439                 /* TRUE if the declaration includes the Microsoft
5440                    __declspec(noinline) specifier. */
5441                 set_irg_inline_property(irg, irg_inline_forbidden);
5442         }
5443 }
5444
5445 static void add_function_pointer(ir_type *segment, ir_entity *method,
5446                                  const char *unique_template)
5447 {
5448         ir_type   *method_type  = get_entity_type(method);
5449         ident     *id           = id_unique(unique_template);
5450         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5451
5452         ident     *ide          = id_unique(unique_template);
5453         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5454         ir_graph  *irg          = get_const_code_irg();
5455         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5456                                                            method, NULL);
5457
5458         set_entity_compiler_generated(ptr, 1);
5459         set_entity_variability(ptr, variability_constant);
5460         set_atomic_ent_value(ptr, val);
5461 }
5462
5463 /**
5464  * Generate possible IJmp branches to a given label block.
5465  */
5466 static void gen_ijmp_branches(ir_node *block)
5467 {
5468         ir_node *ijmp;
5469         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5470                 add_immBlock_pred(block, ijmp);
5471         }
5472 }
5473
5474 /**
5475  * Create code for a function.
5476  */
5477 static void create_function(entity_t *entity)
5478 {
5479         assert(entity->kind == ENTITY_FUNCTION);
5480         ir_entity *function_entity = get_function_entity(entity);
5481
5482         if (entity->function.statement == NULL)
5483                 return;
5484
5485         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5486                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5487                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5488         }
5489         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5490                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5491                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5492         }
5493
5494         current_function_entity = entity;
5495         current_function_name   = NULL;
5496         current_funcsig         = NULL;
5497
5498         assert(all_labels == NULL);
5499         all_labels = NEW_ARR_F(label_t *, 0);
5500         ijmp_list  = NULL;
5501
5502         int       n_local_vars = get_function_n_local_vars(entity);
5503         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5504
5505         ir_graph *old_current_function = current_function;
5506         current_function = irg;
5507
5508         set_irg_fp_model(irg, firm_opt.fp_model);
5509         tarval_enable_fp_ops(1);
5510         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5511
5512         ir_node *first_block = get_cur_block();
5513
5514         /* set inline flags */
5515         if (entity->function.is_inline)
5516                 set_irg_inline_property(irg, irg_inline_recomended);
5517         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5518
5519         next_value_number_function = 0;
5520         initialize_function_parameters(entity);
5521
5522         statement_to_firm(entity->function.statement);
5523
5524         ir_node *end_block = get_irg_end_block(irg);
5525
5526         /* do we have a return statement yet? */
5527         if (get_cur_block() != NULL) {
5528                 type_t *type = skip_typeref(entity->declaration.type);
5529                 assert(is_type_function(type));
5530                 const function_type_t *func_type   = &type->function;
5531                 const type_t          *return_type
5532                         = skip_typeref(func_type->return_type);
5533
5534                 ir_node *ret;
5535                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5536                         ret = new_Return(get_store(), 0, NULL);
5537                 } else {
5538                         ir_mode *mode;
5539                         if (is_type_scalar(return_type)) {
5540                                 mode = get_ir_mode_storage(func_type->return_type);
5541                         } else {
5542                                 mode = mode_P_data;
5543                         }
5544
5545                         ir_node *in[1];
5546                         /* §5.1.2.2.3 main implicitly returns 0 */
5547                         if (is_main(entity)) {
5548                                 in[0] = new_Const(get_mode_null(mode));
5549                         } else {
5550                                 in[0] = new_Unknown(mode);
5551                         }
5552                         ret = new_Return(get_store(), 1, in);
5553                 }
5554                 add_immBlock_pred(end_block, ret);
5555         }
5556
5557         bool has_computed_gotos = false;
5558         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5559                 label_t *label = all_labels[i];
5560                 if (label->address_taken) {
5561                         gen_ijmp_branches(label->block);
5562                         has_computed_gotos = true;
5563                 }
5564                 mature_immBlock(label->block);
5565         }
5566         if (has_computed_gotos) {
5567                 /* if we have computed goto's in the function, we cannot inline it */
5568                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5569                         warningf(&entity->base.source_position,
5570                                  "function '%Y' can never be inlined because it contains a computed goto",
5571                                  entity->base.symbol);
5572                 }
5573                 set_irg_inline_property(irg, irg_inline_forbidden);
5574         }
5575
5576         DEL_ARR_F(all_labels);
5577         all_labels = NULL;
5578
5579         mature_immBlock(first_block);
5580         mature_immBlock(end_block);
5581
5582         irg_finalize_cons(irg);
5583
5584         /* finalize the frame type */
5585         ir_type *frame_type = get_irg_frame_type(irg);
5586         int      n          = get_compound_n_members(frame_type);
5587         int      align_all  = 4;
5588         int      offset     = 0;
5589         for (int i = 0; i < n; ++i) {
5590                 ir_entity *entity      = get_compound_member(frame_type, i);
5591                 ir_type   *entity_type = get_entity_type(entity);
5592
5593                 int align = get_type_alignment_bytes(entity_type);
5594                 if (align > align_all)
5595                         align_all = align;
5596                 int misalign = 0;
5597                 if (align > 0) {
5598                         misalign  = offset % align;
5599                         if (misalign > 0) {
5600                                 offset += align - misalign;
5601                         }
5602                 }
5603
5604                 set_entity_offset(entity, offset);
5605                 offset += get_type_size_bytes(entity_type);
5606         }
5607         set_type_size_bytes(frame_type, offset);
5608         set_type_alignment_bytes(frame_type, align_all);
5609
5610         irg_vrfy(irg);
5611         current_function = old_current_function;
5612
5613         /* create inner functions */
5614         entity_t *inner;
5615         for (inner = next_inner_function(); inner != NULL;
5616              inner = next_inner_function()) {
5617                 create_function(inner);
5618         }
5619 }
5620
5621 static void scope_to_firm(scope_t *scope)
5622 {
5623         /* first pass: create declarations */
5624         entity_t *entity = scope->entities;
5625         for ( ; entity != NULL; entity = entity->base.next) {
5626                 if (entity->base.symbol == NULL)
5627                         continue;
5628
5629                 if (entity->kind == ENTITY_FUNCTION) {
5630                         get_function_entity(entity);
5631                 } else if (entity->kind == ENTITY_VARIABLE) {
5632                         create_global_variable(entity);
5633                 }
5634         }
5635
5636         /* second pass: create code/initializers */
5637         entity = scope->entities;
5638         for ( ; entity != NULL; entity = entity->base.next) {
5639                 if (entity->base.symbol == NULL)
5640                         continue;
5641
5642                 if (entity->kind == ENTITY_FUNCTION) {
5643                         create_function(entity);
5644                 } else if (entity->kind == ENTITY_VARIABLE) {
5645                         assert(entity->declaration.kind
5646                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5647                         current_ir_graph = get_const_code_irg();
5648                         create_variable_initializer(entity);
5649                 }
5650         }
5651 }
5652
5653 void init_ast2firm(void)
5654 {
5655         obstack_init(&asm_obst);
5656         init_atomic_modes();
5657
5658         /* OS option must be set to the backend */
5659         switch (firm_opt.os_support) {
5660         case OS_SUPPORT_MINGW:
5661                 create_ld_ident = create_name_win32;
5662                 break;
5663         case OS_SUPPORT_LINUX:
5664                 create_ld_ident = create_name_linux_elf;
5665                 break;
5666         case OS_SUPPORT_MACHO:
5667                 create_ld_ident = create_name_macho;
5668                 break;
5669         default:
5670                 panic("unexpected OS support mode");
5671         }
5672
5673         /* create idents for all known runtime functions */
5674         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5675                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5676         }
5677
5678         entitymap_init(&entitymap);
5679 }
5680
5681 static void init_ir_types(void)
5682 {
5683         static int ir_types_initialized = 0;
5684         if (ir_types_initialized)
5685                 return;
5686         ir_types_initialized = 1;
5687
5688         ir_type_int        = get_ir_type(type_int);
5689         ir_type_const_char = get_ir_type(type_const_char);
5690         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5691         ir_type_void       = get_ir_type(type_void);
5692
5693         const backend_params *be_params = be_get_backend_param();
5694         mode_float_arithmetic = be_params->mode_float_arithmetic;
5695 }
5696
5697 void exit_ast2firm(void)
5698 {
5699         entitymap_destroy(&entitymap);
5700         obstack_free(&asm_obst, NULL);
5701 }
5702
5703 static void global_asm_to_firm(statement_t *s)
5704 {
5705         for (; s != NULL; s = s->base.next) {
5706                 assert(s->kind == STATEMENT_ASM);
5707
5708                 char const *const text = s->asms.asm_text.begin;
5709                 size_t            size = s->asms.asm_text.size;
5710
5711                 /* skip the last \0 */
5712                 if (text[size - 1] == '\0')
5713                         --size;
5714
5715                 ident *const id = new_id_from_chars(text, size);
5716                 add_irp_asm(id);
5717         }
5718 }
5719
5720 void translation_unit_to_firm(translation_unit_t *unit)
5721 {
5722         /* just to be sure */
5723         continue_label           = NULL;
5724         break_label              = NULL;
5725         current_switch_cond      = NULL;
5726         current_translation_unit = unit;
5727
5728         init_ir_types();
5729         inner_functions = NEW_ARR_F(entity_t *, 0);
5730
5731         scope_to_firm(&unit->scope);
5732         global_asm_to_firm(unit->global_asm);
5733
5734         DEL_ARR_F(inner_functions);
5735         inner_functions  = NULL;
5736
5737         current_ir_graph         = NULL;
5738         current_translation_unit = NULL;
5739 }