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
1448                 if (entity->function.btk != bk_none) {
1449                         /* for gcc compatibility we have to produce (dummy) addresses for some
1450                          * builtins */
1451                         if (warning.other) {
1452                                 warningf(&ref->base.source_position,
1453                                         "taking address of builtin '%Y'", ref->entity->base.symbol);
1454                         }
1455
1456                         /* simply create a NULL pointer */
1457                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1458                         ir_node  *res  = new_Const_long(mode, 0);
1459
1460                         return res;
1461                 }
1462                 return create_symconst(dbgi, mode, entity->function.entity);
1463         }
1464         case DECLARATION_KIND_INNER_FUNCTION: {
1465                 ir_mode *const mode = get_ir_mode_storage(type);
1466                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1467                         /* inner function not using the closure */
1468                         return create_symconst(dbgi, mode, entity->function.entity);
1469                 } else {
1470                         /* TODO: need trampoline here */
1471                         panic("Trampoline code not implemented");
1472                         return create_symconst(dbgi, mode, entity->function.entity);
1473                 }
1474         }
1475         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1476                 ir_node *const addr = get_global_var_address(dbgi, entity);
1477                 return deref_address(dbgi, entity->declaration.type, addr);
1478         }
1479
1480         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1481                 ir_entity *irentity = entity->variable.v.entity;
1482                 ir_node   *frame    = get_local_frame(irentity);
1483                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1484                 return deref_address(dbgi, entity->declaration.type, sel);
1485         }
1486         case DECLARATION_KIND_PARAMETER_ENTITY: {
1487                 ir_entity *irentity = entity->parameter.v.entity;
1488                 ir_node   *frame    = get_local_frame(irentity);
1489                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1490                 return deref_address(dbgi, entity->declaration.type, sel);
1491         }
1492
1493         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1494                 return entity->variable.v.vla_base;
1495
1496         case DECLARATION_KIND_COMPOUND_MEMBER:
1497                 panic("not implemented reference type");
1498         }
1499
1500         panic("reference to declaration with unknown type found");
1501 }
1502
1503 static ir_node *reference_addr(const reference_expression_t *ref)
1504 {
1505         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1506         entity_t *entity = ref->entity;
1507         assert(is_declaration(entity));
1508
1509         switch((declaration_kind_t) entity->declaration.kind) {
1510         case DECLARATION_KIND_UNKNOWN:
1511                 break;
1512         case DECLARATION_KIND_PARAMETER:
1513         case DECLARATION_KIND_LOCAL_VARIABLE:
1514                 /* you can store to a local variable (so we don't panic but return NULL
1515                  * as an indicator for no real address) */
1516                 return NULL;
1517         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1518                 ir_node *const addr = get_global_var_address(dbgi, entity);
1519                 return addr;
1520         }
1521         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1522                 ir_entity *irentity = entity->variable.v.entity;
1523                 ir_node   *frame    = get_local_frame(irentity);
1524                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1525
1526                 return sel;
1527         }
1528         case DECLARATION_KIND_PARAMETER_ENTITY: {
1529                 ir_entity *irentity = entity->parameter.v.entity;
1530                 ir_node   *frame    = get_local_frame(irentity);
1531                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1532
1533                 return sel;
1534         }
1535
1536         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1537                 return entity->variable.v.vla_base;
1538
1539         case DECLARATION_KIND_FUNCTION: {
1540                 type_t  *const type = skip_typeref(entity->declaration.type);
1541                 ir_mode *const mode = get_ir_mode_storage(type);
1542                 return create_symconst(dbgi, mode, entity->function.entity);
1543         }
1544
1545         case DECLARATION_KIND_INNER_FUNCTION:
1546         case DECLARATION_KIND_COMPOUND_MEMBER:
1547                 panic("not implemented reference type");
1548         }
1549
1550         panic("reference to declaration with unknown type found");
1551 }
1552
1553 /**
1554  * Generate an unary builtin.
1555  *
1556  * @param kind           the builtin kind to generate
1557  * @param op             the operand
1558  * @param function_type  the function type for the GNU builtin routine
1559  * @param db             debug info
1560  */
1561 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1562 {
1563         ir_node *in[1];
1564         in[0] = expression_to_firm(op);
1565
1566         ir_type *tp  = get_ir_type(function_type);
1567         ir_type *res = get_method_res_type(tp, 0);
1568         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), kind, 1, in, tp);
1569         set_irn_pinned(irn, op_pin_state_floats);
1570         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1571 }
1572
1573 /**
1574  * Transform calls to builtin functions.
1575  */
1576 static ir_node *process_builtin_call(const call_expression_t *call)
1577 {
1578         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1579
1580         assert(call->function->kind == EXPR_REFERENCE);
1581         reference_expression_t *builtin = &call->function->reference;
1582
1583         type_t *type = skip_typeref(builtin->base.type);
1584         assert(is_type_pointer(type));
1585
1586         type_t   *function_type = skip_typeref(type->pointer.points_to);
1587
1588         switch (builtin->entity->function.btk) {
1589         case bk_gnu_builtin_alloca: {
1590                 if (call->arguments == NULL || call->arguments->next != NULL) {
1591                         panic("invalid number of parameters on __builtin_alloca");
1592                 }
1593                 expression_t *argument = call->arguments->expression;
1594                 ir_node      *size     = expression_to_firm(argument);
1595
1596                 ir_node *store  = get_store();
1597                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1598                                               stack_alloc);
1599                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1600                 set_store(proj_m);
1601                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1602
1603                 return res;
1604         }
1605
1606         case bk_gnu_builtin_huge_val:
1607         case bk_gnu_builtin_inf:
1608         case bk_gnu_builtin_inff:
1609         case bk_gnu_builtin_infl: {
1610                 type_t  *type = function_type->function.return_type;
1611                 ir_mode *mode = get_ir_mode_arithmetic(type);
1612                 tarval  *tv   = get_mode_infinite(mode);
1613                 ir_node *res  = new_d_Const(dbgi, tv);
1614                 return   res;
1615         }
1616         case bk_gnu_builtin_nan:
1617         case bk_gnu_builtin_nanf:
1618         case bk_gnu_builtin_nanl: {
1619                 /* Ignore string for now... */
1620                 assert(is_type_function(function_type));
1621                 type_t  *type = function_type->function.return_type;
1622                 ir_mode *mode = get_ir_mode_arithmetic(type);
1623                 tarval  *tv   = get_mode_NAN(mode);
1624                 ir_node *res  = new_d_Const(dbgi, tv);
1625                 return res;
1626         }
1627         case bk_gnu_builtin_expect: {
1628                 expression_t *argument = call->arguments->expression;
1629                 return _expression_to_firm(argument);
1630         }
1631         case bk_gnu_builtin_va_end:
1632                 /* evaluate the argument of va_end for its side effects */
1633                 _expression_to_firm(call->arguments->expression);
1634                 return NULL;
1635         case bk_gnu_builtin_frame_address: {
1636                 expression_t *const expression = call->arguments->expression;
1637                 long val = fold_constant(expression);
1638                 if (val == 0) {
1639                         /* the nice case */
1640                         return get_irg_frame(current_ir_graph);
1641                 } else {
1642                         /* get the argument */
1643                         ir_node *in[2];
1644
1645                         in[0] = expression_to_firm(expression);
1646                         in[1] = get_irg_frame(current_ir_graph);
1647                         ir_type *tp  = get_ir_type(function_type);
1648                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_frame_addess, 2, in, tp);
1649                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1650                 }
1651         }
1652         case bk_gnu_builtin_return_address: {
1653                 expression_t *const expression = call->arguments->expression;
1654                 ir_node *in[2];
1655
1656                 in[0] = expression_to_firm(expression);
1657                 in[1] = get_irg_frame(current_ir_graph);
1658                 ir_type *tp  = get_ir_type(function_type);
1659                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_return_address, 2, in, tp);
1660                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1661         }
1662         case bk_gnu_builtin_ffs:
1663                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1664         case bk_gnu_builtin_clz:
1665                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1666         case bk_gnu_builtin_ctz:
1667                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1668         case bk_gnu_builtin_popcount:
1669         case bk_ms__popcount:
1670                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1671         case bk_gnu_builtin_parity:
1672                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1673         case bk_gnu_builtin_prefetch: {
1674                 call_argument_t *const args = call->arguments;
1675                 expression_t *const addr    = args->expression;
1676                 ir_node *in[3];
1677
1678                 in[0] = _expression_to_firm(addr);
1679                 if (args->next != NULL) {
1680                         expression_t *const rw = args->next->expression;
1681
1682                         in[1] = _expression_to_firm(rw);
1683
1684                         if (args->next->next != NULL) {
1685                                 expression_t *const locality = args->next->next->expression;
1686
1687                                 in[2] = expression_to_firm(locality);
1688                         } else {
1689                                 in[2] = new_Const_long(mode_int, 3);
1690                         }
1691                 } else {
1692                         in[1] = new_Const_long(mode_int, 0);
1693                         in[2] = new_Const_long(mode_int, 3);
1694                 }
1695                 ir_type *tp  = get_ir_type(function_type);
1696                 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_prefetch, 3, in, tp);
1697                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1698                 return NULL;
1699         }
1700         case bk_gnu_builtin_trap:
1701         case bk_ms__ud2:
1702         {
1703                 ir_type *tp  = get_ir_type(function_type);
1704                 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_trap, 0, NULL, tp);
1705                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1706                 return NULL;
1707         }
1708         case bk_ms__debugbreak: {
1709                 ir_type *tp  = get_ir_type(function_type);
1710                 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_debugbreak, 0, NULL, tp);
1711                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1712                 return NULL;
1713         }
1714         case bk_ms_ReturnAddress: {
1715                 ir_node *in[2];
1716
1717                 in[0] = new_Const_long(mode_int, 0);
1718                 in[1] = get_irg_frame(current_ir_graph);
1719                 ir_type *tp  = get_ir_type(function_type);
1720                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_return_address, 2, in, tp);
1721                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1722         }
1723         default:
1724                 panic("unsupported builtin found");
1725         }
1726 }
1727
1728 /**
1729  * Transform a call expression.
1730  * Handles some special cases, like alloca() calls, which must be resolved
1731  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1732  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1733  * handled right...
1734  */
1735 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1736 {
1737         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1738         assert(get_cur_block() != NULL);
1739
1740         expression_t *function = call->function;
1741         if (function->kind == EXPR_REFERENCE) {
1742                 const reference_expression_t *ref    = &function->reference;
1743                 entity_t                     *entity = ref->entity;
1744
1745                 if (ref->entity->kind == ENTITY_FUNCTION &&
1746                     ref->entity->function.btk != bk_none) {
1747                         return process_builtin_call(call);
1748                 }
1749
1750                 if (entity->kind == ENTITY_FUNCTION
1751                                 && entity->function.entity == rts_entities[rts_alloca]) {
1752                         /* handle alloca() call */
1753                         expression_t *argument = call->arguments->expression;
1754                         ir_node      *size     = expression_to_firm(argument);
1755                         ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1756
1757                         size = create_conv(dbgi, size, mode);
1758
1759                         ir_node  *store  = get_store();
1760                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1761                                                        stack_alloc);
1762                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1763                         set_store(proj_m);
1764                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1765
1766                         return res;
1767                 }
1768         }
1769         ir_node *callee = expression_to_firm(function);
1770
1771         type_t *type = skip_typeref(function->base.type);
1772         assert(is_type_pointer(type));
1773         pointer_type_t *pointer_type = &type->pointer;
1774         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1775         assert(is_type_function(points_to));
1776         function_type_t *function_type = &points_to->function;
1777
1778         int      n_parameters = 0;
1779         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1780         ir_type *new_method_type = NULL;
1781         if (function_type->variadic || function_type->unspecified_parameters) {
1782                 const call_argument_t *argument = call->arguments;
1783                 for ( ; argument != NULL; argument = argument->next) {
1784                         ++n_parameters;
1785                 }
1786
1787                 /* we need to construct a new method type matching the call
1788                  * arguments... */
1789                 int n_res       = get_method_n_ress(ir_method_type);
1790                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1791                                                     n_parameters, n_res, dbgi);
1792                 set_method_calling_convention(new_method_type,
1793                                get_method_calling_convention(ir_method_type));
1794                 set_method_additional_properties(new_method_type,
1795                                get_method_additional_properties(ir_method_type));
1796                 set_method_variadicity(new_method_type,
1797                                        get_method_variadicity(ir_method_type));
1798
1799                 for (int i = 0; i < n_res; ++i) {
1800                         set_method_res_type(new_method_type, i,
1801                                             get_method_res_type(ir_method_type, i));
1802                 }
1803                 argument = call->arguments;
1804                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1805                         expression_t *expression = argument->expression;
1806                         ir_type      *irtype     = get_ir_type(expression->base.type);
1807                         set_method_param_type(new_method_type, i, irtype);
1808                 }
1809                 ir_method_type = new_method_type;
1810         } else {
1811                 n_parameters = get_method_n_params(ir_method_type);
1812         }
1813
1814         ir_node *in[n_parameters];
1815
1816         const call_argument_t *argument = call->arguments;
1817         for (int n = 0; n < n_parameters; ++n) {
1818                 expression_t *expression = argument->expression;
1819                 ir_node      *arg_node   = expression_to_firm(expression);
1820
1821                 type_t  *type = skip_typeref(expression->base.type);
1822                 if (!is_type_compound(type)) {
1823                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1824                         arg_node      = create_conv(dbgi, arg_node, mode);
1825                         arg_node      = do_strict_conv(dbgi, arg_node);
1826                 }
1827
1828                 in[n] = arg_node;
1829
1830                 argument = argument->next;
1831         }
1832
1833         ir_node  *store = get_store();
1834         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1835                                      ir_method_type);
1836         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1837         set_store(mem);
1838
1839         type_t  *return_type = skip_typeref(function_type->return_type);
1840         ir_node *result      = NULL;
1841
1842         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1843                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1844
1845                 if (is_type_scalar(return_type)) {
1846                         ir_mode *mode       = get_ir_mode_storage(return_type);
1847                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1848                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1849                         result              = create_conv(NULL, result, mode_arith);
1850                 } else {
1851                         ir_mode *mode = mode_P_data;
1852                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1853                 }
1854         }
1855
1856         if (function->kind == EXPR_REFERENCE &&
1857             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1858                 /* A dead end:  Keep the Call and the Block.  Also place all further
1859                  * nodes into a new and unreachable block. */
1860                 keep_alive(node);
1861                 keep_alive(get_cur_block());
1862                 new_Block(0, NULL);
1863         }
1864
1865         return result;
1866 }
1867
1868 static void statement_to_firm(statement_t *statement);
1869 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1870
1871 static ir_node *expression_to_addr(const expression_t *expression);
1872 static ir_node *create_condition_evaluation(const expression_t *expression,
1873                                             ir_node *true_block,
1874                                             ir_node *false_block);
1875
1876 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1877                          ir_node *value)
1878 {
1879         if (!is_type_compound(type)) {
1880                 ir_mode *mode = get_ir_mode_storage(type);
1881                 value         = create_conv(dbgi, value, mode);
1882                 value         = do_strict_conv(dbgi, value);
1883         }
1884
1885         ir_node *memory = get_store();
1886
1887         if (is_type_scalar(type)) {
1888                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1889                                       ? cons_volatile : cons_none;
1890                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1891                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1892                 set_store(store_mem);
1893         } else {
1894                 ir_type *irtype    = get_ir_type(type);
1895                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1896                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1897                 set_store(copyb_mem);
1898         }
1899 }
1900
1901 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1902 {
1903         tarval *all_one   = get_mode_all_one(mode);
1904         int     mode_size = get_mode_size_bits(mode);
1905
1906         assert(offset >= 0);
1907         assert(size   >= 0);
1908         assert(offset + size <= mode_size);
1909         if (size == mode_size) {
1910                 return all_one;
1911         }
1912
1913         long    shiftr    = get_mode_size_bits(mode) - size;
1914         long    shiftl    = offset;
1915         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1916         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1917         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1918         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1919
1920         return mask1;
1921 }
1922
1923 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1924                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1925 {
1926         ir_type *entity_type = get_entity_type(entity);
1927         ir_type *base_type   = get_primitive_base_type(entity_type);
1928         assert(base_type != NULL);
1929         ir_mode *mode        = get_type_mode(base_type);
1930
1931         value = create_conv(dbgi, value, mode);
1932
1933         /* kill upper bits of value and shift to right position */
1934         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1935         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1936
1937         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1938         ir_node *mask_node       = new_d_Const(dbgi, mask);
1939         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1940         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1941         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
1942         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1943
1944         /* load current value */
1945         ir_node  *mem             = get_store();
1946         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
1947                                         set_volatile ? cons_volatile : cons_none);
1948         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1949         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1950         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1951         tarval   *inv_mask        = tarval_not(shift_mask);
1952         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1953         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1954
1955         /* construct new value and store */
1956         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1957         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1958                                          set_volatile ? cons_volatile : cons_none);
1959         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1960         set_store(store_mem);
1961
1962         return value_masked;
1963 }
1964
1965 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1966                 ir_node *addr)
1967 {
1968         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1969         type_t   *type     = expression->base.type;
1970         ir_mode  *mode     = get_ir_mode_storage(type);
1971         ir_node  *mem      = get_store();
1972         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
1973         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1974         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1975
1976         load_res           = create_conv(dbgi, load_res, mode_int);
1977
1978         set_store(load_mem);
1979
1980         /* kill upper bits */
1981         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1982         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1983         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1984         ir_type   *entity_type  = get_entity_type(entity);
1985         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1986         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1987         assert(shift_bitsl >= 0);
1988         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1989         ir_node   *countl       = new_d_Const(dbgi, tvl);
1990         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1991
1992         long       shift_bitsr  = bitoffset + shift_bitsl;
1993         assert(shift_bitsr <= (long) machine_size);
1994         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1995         ir_node   *countr       = new_d_Const(dbgi, tvr);
1996         ir_node   *shiftr;
1997         if (mode_is_signed(mode)) {
1998                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1999         } else {
2000                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2001         }
2002
2003         return create_conv(dbgi, shiftr, mode);
2004 }
2005
2006 /* make sure the selected compound type is constructed */
2007 static void construct_select_compound(const select_expression_t *expression)
2008 {
2009         type_t *type = skip_typeref(expression->compound->base.type);
2010         if (is_type_pointer(type)) {
2011                 type = type->pointer.points_to;
2012         }
2013         (void) get_ir_type(type);
2014 }
2015
2016 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2017                                               ir_node *value, ir_node *addr)
2018 {
2019         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2020         type_t   *type = skip_typeref(expression->base.type);
2021
2022         if (!is_type_compound(type)) {
2023                 ir_mode  *mode = get_ir_mode_storage(type);
2024                 value          = create_conv(dbgi, value, mode);
2025                 value          = do_strict_conv(dbgi, value);
2026         }
2027
2028         if (expression->kind == EXPR_REFERENCE) {
2029                 const reference_expression_t *ref = &expression->reference;
2030
2031                 entity_t *entity = ref->entity;
2032                 assert(is_declaration(entity));
2033                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2034                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2035                         set_value(entity->variable.v.value_number, value);
2036                         return value;
2037                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2038                         set_value(entity->parameter.v.value_number, value);
2039                         return value;
2040                 }
2041         }
2042
2043         if (addr == NULL)
2044                 addr = expression_to_addr(expression);
2045         assert(addr != NULL);
2046
2047         if (expression->kind == EXPR_SELECT) {
2048                 const select_expression_t *select = &expression->select;
2049
2050                 construct_select_compound(select);
2051
2052                 entity_t *entity = select->compound_entry;
2053                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2054                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2055                         ir_entity *irentity = entity->compound_member.entity;
2056                         bool       set_volatile
2057                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2058                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2059                                                        set_volatile);
2060                         return value;
2061                 }
2062         }
2063
2064         assign_value(dbgi, addr, type, value);
2065         return value;
2066 }
2067
2068 static void set_value_for_expression(const expression_t *expression,
2069                                      ir_node *value)
2070 {
2071         set_value_for_expression_addr(expression, value, NULL);
2072 }
2073
2074 static ir_node *get_value_from_lvalue(const expression_t *expression,
2075                                       ir_node *addr)
2076 {
2077         if (expression->kind == EXPR_REFERENCE) {
2078                 const reference_expression_t *ref = &expression->reference;
2079
2080                 entity_t *entity = ref->entity;
2081                 assert(entity->kind == ENTITY_VARIABLE
2082                                 || entity->kind == ENTITY_PARAMETER);
2083                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2084                 int value_number;
2085                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2086                         value_number = entity->variable.v.value_number;
2087                         assert(addr == NULL);
2088                         type_t  *type = skip_typeref(expression->base.type);
2089                         ir_mode *mode = get_ir_mode_storage(type);
2090                         ir_node *res  = get_value(value_number, mode);
2091                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2092                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2093                         value_number = entity->parameter.v.value_number;
2094                         assert(addr == NULL);
2095                         type_t  *type = skip_typeref(expression->base.type);
2096                         ir_mode *mode = get_ir_mode_storage(type);
2097                         ir_node *res  = get_value(value_number, mode);
2098                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2099                 }
2100         }
2101
2102         assert(addr != NULL);
2103         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2104
2105         ir_node *value;
2106         if (expression->kind == EXPR_SELECT &&
2107             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2108             construct_select_compound(&expression->select);
2109                 value = bitfield_extract_to_firm(&expression->select, addr);
2110         } else {
2111                 value = deref_address(dbgi, expression->base.type, addr);
2112         }
2113
2114         return value;
2115 }
2116
2117
2118 static ir_node *create_incdec(const unary_expression_t *expression)
2119 {
2120         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2121         const expression_t *value_expr = expression->value;
2122         ir_node            *addr       = expression_to_addr(value_expr);
2123         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2124
2125         type_t  *type = skip_typeref(expression->base.type);
2126         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2127
2128         ir_node *offset;
2129         if (is_type_pointer(type)) {
2130                 pointer_type_t *pointer_type = &type->pointer;
2131                 offset                       = get_type_size(pointer_type->points_to);
2132         } else {
2133                 assert(is_type_arithmetic(type));
2134                 offset = new_Const(get_mode_one(mode));
2135         }
2136
2137         ir_node *result;
2138         ir_node *store_value;
2139         switch(expression->base.kind) {
2140         case EXPR_UNARY_POSTFIX_INCREMENT:
2141                 result      = value;
2142                 store_value = new_d_Add(dbgi, value, offset, mode);
2143                 break;
2144         case EXPR_UNARY_POSTFIX_DECREMENT:
2145                 result      = value;
2146                 store_value = new_d_Sub(dbgi, value, offset, mode);
2147                 break;
2148         case EXPR_UNARY_PREFIX_INCREMENT:
2149                 result      = new_d_Add(dbgi, value, offset, mode);
2150                 store_value = result;
2151                 break;
2152         case EXPR_UNARY_PREFIX_DECREMENT:
2153                 result      = new_d_Sub(dbgi, value, offset, mode);
2154                 store_value = result;
2155                 break;
2156         default:
2157                 panic("no incdec expr in create_incdec");
2158         }
2159
2160         set_value_for_expression_addr(value_expr, store_value, addr);
2161
2162         return result;
2163 }
2164
2165 static bool is_local_variable(expression_t *expression)
2166 {
2167         if (expression->kind != EXPR_REFERENCE)
2168                 return false;
2169         reference_expression_t *ref_expr = &expression->reference;
2170         entity_t               *entity   = ref_expr->entity;
2171         if (entity->kind != ENTITY_VARIABLE)
2172                 return false;
2173         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2174         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2175 }
2176
2177 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2178 {
2179         switch(kind) {
2180         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2181         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2182         case EXPR_BINARY_NOTEQUAL:
2183                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2184         case EXPR_BINARY_ISLESS:
2185         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2186         case EXPR_BINARY_ISLESSEQUAL:
2187         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2188         case EXPR_BINARY_ISGREATER:
2189         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2190         case EXPR_BINARY_ISGREATEREQUAL:
2191         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2192         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2193
2194         default:
2195                 break;
2196         }
2197         panic("trying to get pn_Cmp from non-comparison binexpr type");
2198 }
2199
2200 /**
2201  * Handle the assume optimizer hint: check if a Confirm
2202  * node can be created.
2203  *
2204  * @param dbi    debug info
2205  * @param expr   the IL assume expression
2206  *
2207  * we support here only some simple cases:
2208  *  - var rel const
2209  *  - const rel val
2210  *  - var rel var
2211  */
2212 static ir_node *handle_assume_compare(dbg_info *dbi,
2213                                       const binary_expression_t *expression)
2214 {
2215         expression_t *op1 = expression->left;
2216         expression_t *op2 = expression->right;
2217         entity_t     *var2, *var = NULL;
2218         ir_node      *res = NULL;
2219         pn_Cmp        cmp_val;
2220
2221         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2222
2223         if (is_local_variable(op1) && is_local_variable(op2)) {
2224         var  = op1->reference.entity;
2225             var2 = op2->reference.entity;
2226
2227                 type_t  *const type = skip_typeref(var->declaration.type);
2228                 ir_mode *const mode = get_ir_mode_storage(type);
2229
2230                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2231                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2232
2233                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2234                 set_value(var2->variable.v.value_number, res);
2235
2236                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2237                 set_value(var->variable.v.value_number, res);
2238
2239                 return res;
2240         }
2241
2242         expression_t *con;
2243         if (is_local_variable(op1) && is_constant_expression(op2)) {
2244                 var = op1->reference.entity;
2245                 con = op2;
2246         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2247                 cmp_val = get_inversed_pnc(cmp_val);
2248                 var = op2->reference.entity;
2249                 con = op1;
2250         }
2251
2252         if (var != NULL) {
2253                 type_t  *const type = skip_typeref(var->declaration.type);
2254                 ir_mode *const mode = get_ir_mode_storage(type);
2255
2256                 res = get_value(var->variable.v.value_number, mode);
2257                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2258                 set_value(var->variable.v.value_number, res);
2259         }
2260         return res;
2261 }
2262
2263 /**
2264  * Handle the assume optimizer hint.
2265  *
2266  * @param dbi    debug info
2267  * @param expr   the IL assume expression
2268  */
2269 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2270 {
2271         switch(expression->kind) {
2272         case EXPR_BINARY_EQUAL:
2273         case EXPR_BINARY_NOTEQUAL:
2274         case EXPR_BINARY_LESS:
2275         case EXPR_BINARY_LESSEQUAL:
2276         case EXPR_BINARY_GREATER:
2277         case EXPR_BINARY_GREATEREQUAL:
2278                 return handle_assume_compare(dbi, &expression->binary);
2279         default:
2280                 return NULL;
2281         }
2282 }
2283
2284 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2285 {
2286         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2287         type_t   *type = skip_typeref(expression->base.type);
2288
2289         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2290                 return expression_to_addr(expression->value);
2291
2292         const expression_t *value = expression->value;
2293
2294         switch(expression->base.kind) {
2295         case EXPR_UNARY_NEGATE: {
2296                 ir_node *value_node = expression_to_firm(value);
2297                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2298                 return new_d_Minus(dbgi, value_node, mode);
2299         }
2300         case EXPR_UNARY_PLUS:
2301                 return expression_to_firm(value);
2302         case EXPR_UNARY_BITWISE_NEGATE: {
2303                 ir_node *value_node = expression_to_firm(value);
2304                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2305                 return new_d_Not(dbgi, value_node, mode);
2306         }
2307         case EXPR_UNARY_NOT: {
2308                 ir_node *value_node = _expression_to_firm(value);
2309                 value_node          = create_conv(dbgi, value_node, mode_b);
2310                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2311                 return res;
2312         }
2313         case EXPR_UNARY_DEREFERENCE: {
2314                 ir_node *value_node = expression_to_firm(value);
2315                 type_t  *value_type = skip_typeref(value->base.type);
2316                 assert(is_type_pointer(value_type));
2317                 type_t  *points_to  = value_type->pointer.points_to;
2318                 return deref_address(dbgi, points_to, value_node);
2319         }
2320         case EXPR_UNARY_POSTFIX_INCREMENT:
2321         case EXPR_UNARY_POSTFIX_DECREMENT:
2322         case EXPR_UNARY_PREFIX_INCREMENT:
2323         case EXPR_UNARY_PREFIX_DECREMENT:
2324                 return create_incdec(expression);
2325         case EXPR_UNARY_CAST: {
2326                 ir_node *value_node = expression_to_firm(value);
2327                 if (is_type_scalar(type)) {
2328                         ir_mode *mode       = get_ir_mode_storage(type);
2329                         ir_node *node       = create_conv(dbgi, value_node, mode);
2330                         node                = do_strict_conv(dbgi, node);
2331                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2332                         node                = create_conv(dbgi, node, mode_arith);
2333                         return node;
2334                 } else {
2335                         /* make sure firm type is constructed */
2336                         (void) get_ir_type(type);
2337                         return value_node;
2338                 }
2339         }
2340         case EXPR_UNARY_CAST_IMPLICIT: {
2341                 ir_node *value_node = expression_to_firm(value);
2342                 if (is_type_scalar(type)) {
2343                         ir_mode *mode       = get_ir_mode_storage(type);
2344                         ir_node *res        = create_conv(dbgi, value_node, mode);
2345                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2346                         res                 = create_conv(dbgi, res, mode_arith);
2347                         return res;
2348                 } else {
2349                         return value_node;
2350                 }
2351         }
2352         case EXPR_UNARY_ASSUME:
2353                 if (firm_opt.confirm)
2354                         return handle_assume(dbgi, value);
2355                 else
2356                         return NULL;
2357
2358         default:
2359                 break;
2360         }
2361         panic("invalid UNEXPR type found");
2362 }
2363
2364 /**
2365  * produces a 0/1 depending of the value of a mode_b node
2366  */
2367 static ir_node *produce_condition_result(const expression_t *expression,
2368                                          ir_mode *mode, dbg_info *dbgi)
2369 {
2370         ir_node *cur_block = get_cur_block();
2371
2372         ir_node *one_block = new_immBlock();
2373         set_cur_block(one_block);
2374         ir_node *one       = new_Const(get_mode_one(mode));
2375         ir_node *jmp_one   = new_d_Jmp(dbgi);
2376
2377         ir_node *zero_block = new_immBlock();
2378         set_cur_block(zero_block);
2379         ir_node *zero       = new_Const(get_mode_null(mode));
2380         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2381
2382         set_cur_block(cur_block);
2383         create_condition_evaluation(expression, one_block, zero_block);
2384         mature_immBlock(one_block);
2385         mature_immBlock(zero_block);
2386
2387         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2388         new_Block(2, in_cf);
2389
2390         ir_node *in[2] = { one, zero };
2391         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2392
2393         return val;
2394 }
2395
2396 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2397                 ir_node *value, type_t *type)
2398 {
2399         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2400         assert(is_type_pointer(type));
2401         pointer_type_t *const pointer_type = &type->pointer;
2402         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2403         ir_node        *      elem_size    = get_type_size(points_to);
2404         elem_size                          = create_conv(dbgi, elem_size, mode);
2405         value                              = create_conv(dbgi, value,     mode);
2406         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2407         return mul;
2408 }
2409
2410 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2411                           ir_node *left, ir_node *right)
2412 {
2413         ir_mode  *mode;
2414         type_t   *type_left  = skip_typeref(expression->left->base.type);
2415         type_t   *type_right = skip_typeref(expression->right->base.type);
2416
2417         expression_kind_t kind = expression->base.kind;
2418
2419         switch (kind) {
2420         case EXPR_BINARY_SHIFTLEFT:
2421         case EXPR_BINARY_SHIFTRIGHT:
2422         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2423         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2424                 mode  = get_irn_mode(left);
2425                 right = create_conv(dbgi, right, mode_uint);
2426                 break;
2427
2428         case EXPR_BINARY_SUB:
2429                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2430                         const pointer_type_t *const ptr_type = &type_left->pointer;
2431
2432                         mode = get_ir_mode_arithmetic(expression->base.type);
2433                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2434                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2435                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2436                         ir_node *const no_mem    = new_NoMem();
2437                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2438                                                                                                    mode, op_pin_state_floats);
2439                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2440                 }
2441                 /* fallthrough */
2442         case EXPR_BINARY_SUB_ASSIGN:
2443                 if (is_type_pointer(type_left)) {
2444                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2445                         mode  = get_ir_mode_arithmetic(type_left);
2446                         break;
2447                 }
2448                 goto normal_node;
2449
2450         case EXPR_BINARY_ADD:
2451         case EXPR_BINARY_ADD_ASSIGN:
2452                 if (is_type_pointer(type_left)) {
2453                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2454                         mode  = get_ir_mode_arithmetic(type_left);
2455                         break;
2456                 } else if (is_type_pointer(type_right)) {
2457                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2458                         mode  = get_ir_mode_arithmetic(type_right);
2459                         break;
2460                 }
2461                 goto normal_node;
2462
2463         default:
2464 normal_node:
2465                 mode = get_ir_mode_arithmetic(type_right);
2466                 left = create_conv(dbgi, left, mode);
2467                 break;
2468         }
2469
2470         switch (kind) {
2471         case EXPR_BINARY_ADD_ASSIGN:
2472         case EXPR_BINARY_ADD:
2473                 return new_d_Add(dbgi, left, right, mode);
2474         case EXPR_BINARY_SUB_ASSIGN:
2475         case EXPR_BINARY_SUB:
2476                 return new_d_Sub(dbgi, left, right, mode);
2477         case EXPR_BINARY_MUL_ASSIGN:
2478         case EXPR_BINARY_MUL:
2479                 return new_d_Mul(dbgi, left, right, mode);
2480         case EXPR_BINARY_BITWISE_AND:
2481         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2482                 return new_d_And(dbgi, left, right, mode);
2483         case EXPR_BINARY_BITWISE_OR:
2484         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2485                 return new_d_Or(dbgi, left, right, mode);
2486         case EXPR_BINARY_BITWISE_XOR:
2487         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2488                 return new_d_Eor(dbgi, left, right, mode);
2489         case EXPR_BINARY_SHIFTLEFT:
2490         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2491                 return new_d_Shl(dbgi, left, right, mode);
2492         case EXPR_BINARY_SHIFTRIGHT:
2493         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2494                 if (mode_is_signed(mode)) {
2495                         return new_d_Shrs(dbgi, left, right, mode);
2496                 } else {
2497                         return new_d_Shr(dbgi, left, right, mode);
2498                 }
2499         case EXPR_BINARY_DIV:
2500         case EXPR_BINARY_DIV_ASSIGN: {
2501                 ir_node *pin = new_Pin(new_NoMem());
2502                 ir_node *op;
2503                 ir_node *res;
2504                 if (mode_is_float(mode)) {
2505                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2506                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2507                 } else {
2508                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2509                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2510                 }
2511                 return res;
2512         }
2513         case EXPR_BINARY_MOD:
2514         case EXPR_BINARY_MOD_ASSIGN: {
2515                 ir_node *pin = new_Pin(new_NoMem());
2516                 assert(!mode_is_float(mode));
2517                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2518                                          op_pin_state_floats);
2519                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2520                 return res;
2521         }
2522         default:
2523                 panic("unexpected expression kind");
2524         }
2525 }
2526
2527 static ir_node *create_lazy_op(const binary_expression_t *expression)
2528 {
2529         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2530         type_t   *type = skip_typeref(expression->base.type);
2531         ir_mode  *mode = get_ir_mode_arithmetic(type);
2532
2533         if (is_constant_expression(expression->left)) {
2534                 long val = fold_constant(expression->left);
2535                 expression_kind_t ekind = expression->base.kind;
2536                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2537                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2538                         if (val == 0) {
2539                                 return new_Const(get_mode_null(mode));
2540                         }
2541                 } else {
2542                         if (val != 0) {
2543                                 return new_Const(get_mode_one(mode));
2544                         }
2545                 }
2546
2547                 if (is_constant_expression(expression->right)) {
2548                         long const valr = fold_constant(expression->right);
2549                         return valr != 0 ?
2550                                 new_Const(get_mode_one(mode)) :
2551                                 new_Const(get_mode_null(mode));
2552                 }
2553
2554                 return produce_condition_result(expression->right, mode, dbgi);
2555         }
2556
2557         return produce_condition_result((const expression_t*) expression, mode,
2558                                         dbgi);
2559 }
2560
2561 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2562                                             ir_node *right, ir_mode *mode);
2563
2564 static ir_node *create_assign_binop(const binary_expression_t *expression)
2565 {
2566         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2567         const expression_t *left_expr = expression->left;
2568         type_t             *type      = skip_typeref(left_expr->base.type);
2569         ir_mode            *left_mode = get_ir_mode_storage(type);
2570         ir_node            *right     = expression_to_firm(expression->right);
2571         ir_node            *left_addr = expression_to_addr(left_expr);
2572         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2573         ir_node            *result    = create_op(dbgi, expression, left, right);
2574
2575         result = create_conv(dbgi, result, left_mode);
2576         result = do_strict_conv(dbgi, result);
2577
2578         result = set_value_for_expression_addr(left_expr, result, left_addr);
2579
2580         if (!is_type_compound(type)) {
2581                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2582                 result = create_conv(dbgi, result, mode_arithmetic);
2583         }
2584         return result;
2585 }
2586
2587 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2588 {
2589         expression_kind_t kind = expression->base.kind;
2590
2591         switch(kind) {
2592         case EXPR_BINARY_EQUAL:
2593         case EXPR_BINARY_NOTEQUAL:
2594         case EXPR_BINARY_LESS:
2595         case EXPR_BINARY_LESSEQUAL:
2596         case EXPR_BINARY_GREATER:
2597         case EXPR_BINARY_GREATEREQUAL:
2598         case EXPR_BINARY_ISGREATER:
2599         case EXPR_BINARY_ISGREATEREQUAL:
2600         case EXPR_BINARY_ISLESS:
2601         case EXPR_BINARY_ISLESSEQUAL:
2602         case EXPR_BINARY_ISLESSGREATER:
2603         case EXPR_BINARY_ISUNORDERED: {
2604                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2605                 ir_node *left  = expression_to_firm(expression->left);
2606                 ir_node *right = expression_to_firm(expression->right);
2607                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2608                 long     pnc   = get_pnc(kind, expression->left->base.type);
2609                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2610                 return proj;
2611         }
2612         case EXPR_BINARY_ASSIGN: {
2613                 ir_node *addr  = expression_to_addr(expression->left);
2614                 ir_node *right = expression_to_firm(expression->right);
2615                 ir_node *res
2616                         = set_value_for_expression_addr(expression->left, right, addr);
2617
2618                 type_t  *type            = skip_typeref(expression->base.type);
2619                 if (!is_type_compound(type)) {
2620                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2621                         res                      = create_conv(NULL, res, mode_arithmetic);
2622                 }
2623                 return res;
2624         }
2625         case EXPR_BINARY_ADD:
2626         case EXPR_BINARY_SUB:
2627         case EXPR_BINARY_MUL:
2628         case EXPR_BINARY_DIV:
2629         case EXPR_BINARY_MOD:
2630         case EXPR_BINARY_BITWISE_AND:
2631         case EXPR_BINARY_BITWISE_OR:
2632         case EXPR_BINARY_BITWISE_XOR:
2633         case EXPR_BINARY_SHIFTLEFT:
2634         case EXPR_BINARY_SHIFTRIGHT:
2635         {
2636                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2637                 ir_node  *left  = expression_to_firm(expression->left);
2638                 ir_node  *right = expression_to_firm(expression->right);
2639                 return create_op(dbgi, expression, left, right);
2640         }
2641         case EXPR_BINARY_LOGICAL_AND:
2642         case EXPR_BINARY_LOGICAL_OR:
2643                 return create_lazy_op(expression);
2644         case EXPR_BINARY_COMMA:
2645                 /* create side effects of left side */
2646                 (void) expression_to_firm(expression->left);
2647                 return _expression_to_firm(expression->right);
2648
2649         case EXPR_BINARY_ADD_ASSIGN:
2650         case EXPR_BINARY_SUB_ASSIGN:
2651         case EXPR_BINARY_MUL_ASSIGN:
2652         case EXPR_BINARY_MOD_ASSIGN:
2653         case EXPR_BINARY_DIV_ASSIGN:
2654         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2655         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2656         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2657         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2658         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2659                 return create_assign_binop(expression);
2660         default:
2661                 panic("TODO binexpr type");
2662         }
2663 }
2664
2665 static ir_node *array_access_addr(const array_access_expression_t *expression)
2666 {
2667         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2668         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2669         ir_node  *offset      = expression_to_firm(expression->index);
2670         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2671         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2672         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2673
2674         return result;
2675 }
2676
2677 static ir_node *array_access_to_firm(
2678                 const array_access_expression_t *expression)
2679 {
2680         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2681         ir_node  *addr   = array_access_addr(expression);
2682         type_t   *type   = revert_automatic_type_conversion(
2683                         (const expression_t*) expression);
2684         type             = skip_typeref(type);
2685
2686         return deref_address(dbgi, type, addr);
2687 }
2688
2689 static long get_offsetof_offset(const offsetof_expression_t *expression)
2690 {
2691         type_t *orig_type = expression->type;
2692         long    offset    = 0;
2693
2694         designator_t *designator = expression->designator;
2695         for ( ; designator != NULL; designator = designator->next) {
2696                 type_t *type = skip_typeref(orig_type);
2697                 /* be sure the type is constructed */
2698                 (void) get_ir_type(type);
2699
2700                 if (designator->symbol != NULL) {
2701                         assert(is_type_compound(type));
2702                         symbol_t *symbol = designator->symbol;
2703
2704                         compound_t *compound = type->compound.compound;
2705                         entity_t   *iter     = compound->members.entities;
2706                         for ( ; iter != NULL; iter = iter->base.next) {
2707                                 if (iter->base.symbol == symbol) {
2708                                         break;
2709                                 }
2710                         }
2711                         assert(iter != NULL);
2712
2713                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2714                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2715                         offset += get_entity_offset(iter->compound_member.entity);
2716
2717                         orig_type = iter->declaration.type;
2718                 } else {
2719                         expression_t *array_index = designator->array_index;
2720                         assert(designator->array_index != NULL);
2721                         assert(is_type_array(type));
2722
2723                         long index         = fold_constant(array_index);
2724                         ir_type *arr_type  = get_ir_type(type);
2725                         ir_type *elem_type = get_array_element_type(arr_type);
2726                         long     elem_size = get_type_size_bytes(elem_type);
2727
2728                         offset += index * elem_size;
2729
2730                         orig_type = type->array.element_type;
2731                 }
2732         }
2733
2734         return offset;
2735 }
2736
2737 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2738 {
2739         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2740         long      offset = get_offsetof_offset(expression);
2741         tarval   *tv     = new_tarval_from_long(offset, mode);
2742         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2743
2744         return new_d_Const(dbgi, tv);
2745 }
2746
2747 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2748                                      ir_entity *entity, type_t *type);
2749
2750 static ir_node *compound_literal_to_firm(
2751                 const compound_literal_expression_t *expression)
2752 {
2753         type_t *type = expression->type;
2754
2755         /* create an entity on the stack */
2756         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2757
2758         ident     *const id     = id_unique("CompLit.%u");
2759         ir_type   *const irtype = get_ir_type(type);
2760         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2761         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2762         set_entity_ld_ident(entity, id);
2763
2764         set_entity_variability(entity, variability_uninitialized);
2765
2766         /* create initialisation code */
2767         initializer_t *initializer = expression->initializer;
2768         create_local_initializer(initializer, dbgi, entity, type);
2769
2770         /* create a sel for the compound literal address */
2771         ir_node *frame = get_local_frame(entity);
2772         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2773         return sel;
2774 }
2775
2776 /**
2777  * Transform a sizeof expression into Firm code.
2778  */
2779 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2780 {
2781         type_t *type = expression->type;
2782         if (type == NULL) {
2783                 type = expression->tp_expression->base.type;
2784                 assert(type != NULL);
2785         }
2786
2787         type = skip_typeref(type);
2788         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2789         if (is_type_array(type) && type->array.is_vla
2790                         && expression->tp_expression != NULL) {
2791                 expression_to_firm(expression->tp_expression);
2792         }
2793
2794         return get_type_size(type);
2795 }
2796
2797 static entity_t *get_expression_entity(const expression_t *expression)
2798 {
2799         if (expression->kind != EXPR_REFERENCE)
2800                 return NULL;
2801
2802         return expression->reference.entity;
2803 }
2804
2805 /**
2806  * Transform an alignof expression into Firm code.
2807  */
2808 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2809 {
2810         ir_entity *irentity = NULL;
2811
2812         const expression_t *tp_expression = expression->tp_expression;
2813         if (tp_expression != NULL) {
2814                 entity_t *entity = get_expression_entity(tp_expression);
2815                 if (entity != NULL && is_declaration(entity)) {
2816                         switch (entity->declaration.kind) {
2817                         case DECLARATION_KIND_UNKNOWN:
2818                                 panic("unknown entity reference found");
2819                         case DECLARATION_KIND_COMPOUND_MEMBER:
2820                                 irentity = entity->compound_member.entity;
2821                                 break;
2822                         case DECLARATION_KIND_GLOBAL_VARIABLE:
2823                         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2824                                 irentity = entity->variable.v.entity;
2825                                 break;
2826                         case DECLARATION_KIND_PARAMETER_ENTITY:
2827                                 irentity = entity->parameter.v.entity;
2828                                 break;
2829                         case DECLARATION_KIND_FUNCTION:
2830                         case DECLARATION_KIND_INNER_FUNCTION:
2831                                 irentity = entity->function.entity;
2832                                 break;
2833                         case DECLARATION_KIND_PARAMETER:
2834                         case DECLARATION_KIND_LOCAL_VARIABLE:
2835                         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2836                                 break;
2837                         }
2838                 }
2839         }
2840
2841         ir_type *irtype;
2842         if (irentity != NULL) {
2843                 irtype = get_entity_type(irentity);
2844         } else {
2845                 type_t *type = expression->type;
2846                 irtype = get_ir_type(type);
2847         }
2848
2849         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2850         symconst_symbol sym;
2851         sym.type_p = irtype;
2852         return new_SymConst(mode, sym, symconst_type_align);
2853 }
2854
2855 static void init_ir_types(void);
2856
2857 long fold_constant(const expression_t *expression)
2858 {
2859         assert(is_type_valid(skip_typeref(expression->base.type)));
2860
2861         bool constant_folding_old = constant_folding;
2862         constant_folding = true;
2863
2864         init_ir_types();
2865
2866         assert(is_constant_expression(expression));
2867
2868         ir_graph *old_current_ir_graph = current_ir_graph;
2869         current_ir_graph = get_const_code_irg();
2870
2871         ir_node *cnst = expression_to_firm(expression);
2872         current_ir_graph = old_current_ir_graph;
2873
2874         if (!is_Const(cnst)) {
2875                 panic("couldn't fold constant");
2876         }
2877
2878         tarval *tv = get_Const_tarval(cnst);
2879         if (!tarval_is_long(tv)) {
2880                 panic("result of constant folding is not integer");
2881         }
2882
2883         constant_folding = constant_folding_old;
2884
2885         return get_tarval_long(tv);
2886 }
2887
2888 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2889 {
2890         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2891
2892         /* first try to fold a constant condition */
2893         if (is_constant_expression(expression->condition)) {
2894                 long val = fold_constant(expression->condition);
2895                 if (val) {
2896                         expression_t *true_expression = expression->true_expression;
2897                         if (true_expression == NULL)
2898                                 true_expression = expression->condition;
2899                         return expression_to_firm(true_expression);
2900                 } else {
2901                         return expression_to_firm(expression->false_expression);
2902                 }
2903         }
2904
2905         ir_node *cur_block   = get_cur_block();
2906
2907         /* create the true block */
2908         ir_node *true_block  = new_immBlock();
2909         set_cur_block(true_block);
2910
2911         ir_node *true_val = expression->true_expression != NULL ?
2912                 expression_to_firm(expression->true_expression) : NULL;
2913         ir_node *true_jmp = new_Jmp();
2914
2915         /* create the false block */
2916         ir_node *false_block = new_immBlock();
2917         set_cur_block(false_block);
2918
2919         ir_node *false_val = expression_to_firm(expression->false_expression);
2920         ir_node *false_jmp = new_Jmp();
2921
2922         /* create the condition evaluation */
2923         set_cur_block(cur_block);
2924         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2925         if (expression->true_expression == NULL) {
2926                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2927                         true_val = cond_expr;
2928                 } else {
2929                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2930                          * comparison.  Generate a "1" as value for the true branch. */
2931                         true_val = new_Const(get_mode_one(mode_Is));
2932                 }
2933         }
2934         mature_immBlock(true_block);
2935         mature_immBlock(false_block);
2936
2937         /* create the common block */
2938         ir_node *in_cf[2] = { true_jmp, false_jmp };
2939         new_Block(2, in_cf);
2940
2941         /* TODO improve static semantics, so either both or no values are NULL */
2942         if (true_val == NULL || false_val == NULL)
2943                 return NULL;
2944
2945         ir_node *in[2] = { true_val, false_val };
2946         ir_mode *mode  = get_irn_mode(true_val);
2947         assert(get_irn_mode(false_val) == mode);
2948         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2949
2950         return val;
2951 }
2952
2953 /**
2954  * Returns an IR-node representing the address of a field.
2955  */
2956 static ir_node *select_addr(const select_expression_t *expression)
2957 {
2958         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2959
2960         construct_select_compound(expression);
2961
2962         ir_node *compound_addr = expression_to_firm(expression->compound);
2963
2964         entity_t *entry = expression->compound_entry;
2965         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2966         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2967
2968         if (constant_folding) {
2969                 ir_mode *mode = get_irn_mode(compound_addr);
2970                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2971                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
2972                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2973         } else {
2974                 ir_entity *irentity = entry->compound_member.entity;
2975                 assert(irentity != NULL);
2976                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2977         }
2978 }
2979
2980 static ir_node *select_to_firm(const select_expression_t *expression)
2981 {
2982         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2983         ir_node  *addr = select_addr(expression);
2984         type_t   *type = revert_automatic_type_conversion(
2985                         (const expression_t*) expression);
2986         type           = skip_typeref(type);
2987
2988         entity_t *entry      = expression->compound_entry;
2989         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2990         type_t   *entry_type = skip_typeref(entry->declaration.type);
2991
2992         if (entry_type->kind == TYPE_BITFIELD) {
2993                 return bitfield_extract_to_firm(expression, addr);
2994         }
2995
2996         return deref_address(dbgi, type, addr);
2997 }
2998
2999 /* Values returned by __builtin_classify_type. */
3000 typedef enum gcc_type_class
3001 {
3002         no_type_class = -1,
3003         void_type_class,
3004         integer_type_class,
3005         char_type_class,
3006         enumeral_type_class,
3007         boolean_type_class,
3008         pointer_type_class,
3009         reference_type_class,
3010         offset_type_class,
3011         real_type_class,
3012         complex_type_class,
3013         function_type_class,
3014         method_type_class,
3015         record_type_class,
3016         union_type_class,
3017         array_type_class,
3018         string_type_class,
3019         set_type_class,
3020         file_type_class,
3021         lang_type_class
3022 } gcc_type_class;
3023
3024 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3025 {
3026         type_t *type = expr->type_expression->base.type;
3027
3028         /* FIXME gcc returns different values depending on whether compiling C or C++
3029          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3030         gcc_type_class tc;
3031         for (;;) {
3032                 type = skip_typeref(type);
3033                 switch (type->kind) {
3034                         case TYPE_ATOMIC: {
3035                                 const atomic_type_t *const atomic_type = &type->atomic;
3036                                 switch (atomic_type->akind) {
3037                                         /* should not be reached */
3038                                         case ATOMIC_TYPE_INVALID:
3039                                                 tc = no_type_class;
3040                                                 goto make_const;
3041
3042                                         /* gcc cannot do that */
3043                                         case ATOMIC_TYPE_VOID:
3044                                                 tc = void_type_class;
3045                                                 goto make_const;
3046
3047                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3048                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3049                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3050                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3051                                         case ATOMIC_TYPE_SHORT:
3052                                         case ATOMIC_TYPE_USHORT:
3053                                         case ATOMIC_TYPE_INT:
3054                                         case ATOMIC_TYPE_UINT:
3055                                         case ATOMIC_TYPE_LONG:
3056                                         case ATOMIC_TYPE_ULONG:
3057                                         case ATOMIC_TYPE_LONGLONG:
3058                                         case ATOMIC_TYPE_ULONGLONG:
3059                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3060                                                 tc = integer_type_class;
3061                                                 goto make_const;
3062
3063                                         case ATOMIC_TYPE_FLOAT:
3064                                         case ATOMIC_TYPE_DOUBLE:
3065                                         case ATOMIC_TYPE_LONG_DOUBLE:
3066                                                 tc = real_type_class;
3067                                                 goto make_const;
3068                                 }
3069                                 panic("Unexpected atomic type in classify_type_to_firm().");
3070                         }
3071
3072                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3073                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3074                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3075                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3076                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3077                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3078                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3079                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3080
3081                         /* gcc handles this as integer */
3082                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3083
3084                         /* gcc classifies the referenced type */
3085                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3086
3087                         case TYPE_BUILTIN:
3088                         /* typedef/typeof should be skipped already */
3089                         case TYPE_TYPEDEF:
3090                         case TYPE_TYPEOF:
3091                         case TYPE_INVALID:
3092                         case TYPE_ERROR:
3093                                 break;
3094                 }
3095                 panic("unexpected TYPE classify_type_to_firm().");
3096         }
3097
3098 make_const:;
3099         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3100         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3101         return new_d_Const(dbgi, tv);
3102 }
3103
3104 static ir_node *function_name_to_firm(
3105                 const funcname_expression_t *const expr)
3106 {
3107         switch(expr->kind) {
3108         case FUNCNAME_FUNCTION:
3109         case FUNCNAME_PRETTY_FUNCTION:
3110         case FUNCNAME_FUNCDNAME:
3111                 if (current_function_name == NULL) {
3112                         const source_position_t *const src_pos = &expr->base.source_position;
3113                         const char    *name  = current_function_entity->base.symbol->string;
3114                         const string_t string = { name, strlen(name) + 1 };
3115                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3116                 }
3117                 return current_function_name;
3118         case FUNCNAME_FUNCSIG:
3119                 if (current_funcsig == NULL) {
3120                         const source_position_t *const src_pos = &expr->base.source_position;
3121                         ir_entity *ent = get_irg_entity(current_ir_graph);
3122                         const char *const name = get_entity_ld_name(ent);
3123                         const string_t string = { name, strlen(name) + 1 };
3124                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3125                 }
3126                 return current_funcsig;
3127         }
3128         panic("Unsupported function name");
3129 }
3130
3131 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3132 {
3133         statement_t *statement = expr->statement;
3134
3135         assert(statement->kind == STATEMENT_COMPOUND);
3136         return compound_statement_to_firm(&statement->compound);
3137 }
3138
3139 static ir_node *va_start_expression_to_firm(
3140         const va_start_expression_t *const expr)
3141 {
3142         type_t    *const type        = current_function_entity->declaration.type;
3143         ir_type   *const method_type = get_ir_type(type);
3144         int        const n           = get_method_n_params(method_type) - 1;
3145         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3146         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
3147         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3148         ir_node   *const no_mem      = new_NoMem();
3149         ir_node   *const arg_sel     =
3150                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3151
3152         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
3153         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3154         set_value_for_expression(expr->ap, add);
3155
3156         return NULL;
3157 }
3158
3159 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3160 {
3161         type_t       *const type    = expr->base.type;
3162         expression_t *const ap_expr = expr->ap;
3163         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3164         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3165         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3166         ir_node      *const res     = deref_address(dbgi, type, ap);
3167
3168         ir_node      *const cnst    = get_type_size(expr->base.type);
3169         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
3170
3171         set_value_for_expression_addr(ap_expr, add, ap_addr);
3172
3173         return res;
3174 }
3175
3176 static ir_node *dereference_addr(const unary_expression_t *const expression)
3177 {
3178         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3179         return expression_to_firm(expression->value);
3180 }
3181
3182 /**
3183  * Returns a IR-node representing an lvalue of the given expression.
3184  */
3185 static ir_node *expression_to_addr(const expression_t *expression)
3186 {
3187         switch(expression->kind) {
3188         case EXPR_ARRAY_ACCESS:
3189                 return array_access_addr(&expression->array_access);
3190         case EXPR_CALL:
3191                 return call_expression_to_firm(&expression->call);
3192         case EXPR_COMPOUND_LITERAL:
3193                 return compound_literal_to_firm(&expression->compound_literal);
3194         case EXPR_REFERENCE:
3195                 return reference_addr(&expression->reference);
3196         case EXPR_SELECT:
3197                 return select_addr(&expression->select);
3198         case EXPR_UNARY_DEREFERENCE:
3199                 return dereference_addr(&expression->unary);
3200         default:
3201                 break;
3202         }
3203         panic("trying to get address of non-lvalue");
3204 }
3205
3206 static ir_node *builtin_constant_to_firm(
3207                 const builtin_constant_expression_t *expression)
3208 {
3209         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3210         long     v;
3211
3212         if (is_constant_expression(expression->value)) {
3213                 v = 1;
3214         } else {
3215                 v = 0;
3216         }
3217         return new_Const_long(mode, v);
3218 }
3219
3220 static ir_node *builtin_types_compatible_to_firm(
3221                 const builtin_types_compatible_expression_t *expression)
3222 {
3223         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3224         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3225         long     const value = types_compatible(left, right) ? 1 : 0;
3226         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3227         return new_Const_long(mode, value);
3228 }
3229
3230 static ir_node *get_label_block(label_t *label)
3231 {
3232         if (label->block != NULL)
3233                 return label->block;
3234
3235         /* beware: might be called from create initializer with current_ir_graph
3236          * set to const_code_irg. */
3237         ir_graph *rem    = current_ir_graph;
3238         current_ir_graph = current_function;
3239
3240         ir_node *block = new_immBlock();
3241
3242         label->block = block;
3243
3244         ARR_APP1(label_t *, all_labels, label);
3245
3246         current_ir_graph = rem;
3247         return block;
3248 }
3249
3250 /**
3251  * Pointer to a label.  This is used for the
3252  * GNU address-of-label extension.
3253  */
3254 static ir_node *label_address_to_firm(
3255                 const label_address_expression_t *label)
3256 {
3257         ir_node    *block = get_label_block(label->label);
3258         ir_label_t  nr    = get_Block_label(block);
3259
3260         if (nr == 0) {
3261                 nr = get_irp_next_label_nr();
3262                 set_Block_label(block, nr);
3263         }
3264         symconst_symbol value;
3265         value.label = nr;
3266         return new_SymConst(mode_P_code, value, symconst_label);
3267 }
3268
3269 /**
3270  * creates firm nodes for an expression. The difference between this function
3271  * and expression_to_firm is, that this version might produce mode_b nodes
3272  * instead of mode_Is.
3273  */
3274 static ir_node *_expression_to_firm(const expression_t *expression)
3275 {
3276 #ifndef NDEBUG
3277         if (!constant_folding) {
3278                 assert(!expression->base.transformed);
3279                 ((expression_t*) expression)->base.transformed = true;
3280         }
3281 #endif
3282
3283         switch (expression->kind) {
3284         case EXPR_CHARACTER_CONSTANT:
3285                 return character_constant_to_firm(&expression->conste);
3286         case EXPR_WIDE_CHARACTER_CONSTANT:
3287                 return wide_character_constant_to_firm(&expression->conste);
3288         case EXPR_CONST:
3289                 return const_to_firm(&expression->conste);
3290         case EXPR_STRING_LITERAL:
3291                 return string_literal_to_firm(&expression->string);
3292         case EXPR_WIDE_STRING_LITERAL:
3293                 return wide_string_literal_to_firm(&expression->wide_string);
3294         case EXPR_REFERENCE:
3295                 return reference_expression_to_firm(&expression->reference);
3296         case EXPR_REFERENCE_ENUM_VALUE:
3297                 return reference_expression_enum_value_to_firm(&expression->reference);
3298         case EXPR_CALL:
3299                 return call_expression_to_firm(&expression->call);
3300         EXPR_UNARY_CASES
3301                 return unary_expression_to_firm(&expression->unary);
3302         EXPR_BINARY_CASES
3303                 return binary_expression_to_firm(&expression->binary);
3304         case EXPR_ARRAY_ACCESS:
3305                 return array_access_to_firm(&expression->array_access);
3306         case EXPR_SIZEOF:
3307                 return sizeof_to_firm(&expression->typeprop);
3308         case EXPR_ALIGNOF:
3309                 return alignof_to_firm(&expression->typeprop);
3310         case EXPR_CONDITIONAL:
3311                 return conditional_to_firm(&expression->conditional);
3312         case EXPR_SELECT:
3313                 return select_to_firm(&expression->select);
3314         case EXPR_CLASSIFY_TYPE:
3315                 return classify_type_to_firm(&expression->classify_type);
3316         case EXPR_FUNCNAME:
3317                 return function_name_to_firm(&expression->funcname);
3318         case EXPR_STATEMENT:
3319                 return statement_expression_to_firm(&expression->statement);
3320         case EXPR_VA_START:
3321                 return va_start_expression_to_firm(&expression->va_starte);
3322         case EXPR_VA_ARG:
3323                 return va_arg_expression_to_firm(&expression->va_arge);
3324         case EXPR_BUILTIN_CONSTANT_P:
3325                 return builtin_constant_to_firm(&expression->builtin_constant);
3326         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3327                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3328         case EXPR_OFFSETOF:
3329                 return offsetof_to_firm(&expression->offsetofe);
3330         case EXPR_COMPOUND_LITERAL:
3331                 return compound_literal_to_firm(&expression->compound_literal);
3332         case EXPR_LABEL_ADDRESS:
3333                 return label_address_to_firm(&expression->label_address);
3334
3335         case EXPR_UNKNOWN:
3336         case EXPR_INVALID:
3337                 break;
3338         }
3339         panic("invalid expression found");
3340 }
3341
3342 /**
3343  * Check if a given expression is a GNU __builtin_expect() call.
3344  */
3345 static bool is_builtin_expect(const expression_t *expression)
3346 {
3347         if (expression->kind != EXPR_CALL)
3348                 return false;
3349
3350         expression_t *function = expression->call.function;
3351         if (function->kind != EXPR_REFERENCE)
3352                 return false;
3353         reference_expression_t *ref = &function->reference;
3354         if (ref->entity->kind == ENTITY_FUNCTION &&
3355             ref->entity->function.btk != bk_gnu_builtin_expect)
3356                 return false;
3357
3358         return true;
3359 }
3360
3361 static bool produces_mode_b(const expression_t *expression)
3362 {
3363         switch (expression->kind) {
3364         case EXPR_BINARY_EQUAL:
3365         case EXPR_BINARY_NOTEQUAL:
3366         case EXPR_BINARY_LESS:
3367         case EXPR_BINARY_LESSEQUAL:
3368         case EXPR_BINARY_GREATER:
3369         case EXPR_BINARY_GREATEREQUAL:
3370         case EXPR_BINARY_ISGREATER:
3371         case EXPR_BINARY_ISGREATEREQUAL:
3372         case EXPR_BINARY_ISLESS:
3373         case EXPR_BINARY_ISLESSEQUAL:
3374         case EXPR_BINARY_ISLESSGREATER:
3375         case EXPR_BINARY_ISUNORDERED:
3376         case EXPR_UNARY_NOT:
3377                 return true;
3378
3379         case EXPR_CALL:
3380                 if (is_builtin_expect(expression)) {
3381                         expression_t *argument = expression->call.arguments->expression;
3382                         return produces_mode_b(argument);
3383                 }
3384                 return false;
3385         case EXPR_BINARY_COMMA:
3386                 return produces_mode_b(expression->binary.right);
3387
3388         default:
3389                 return false;
3390         }
3391 }
3392
3393 static ir_node *expression_to_firm(const expression_t *expression)
3394 {
3395         if (!produces_mode_b(expression)) {
3396                 ir_node *res = _expression_to_firm(expression);
3397                 assert(res == NULL || get_irn_mode(res) != mode_b);
3398                 return res;
3399         }
3400
3401         if (is_constant_expression(expression)) {
3402                 ir_node *res  = _expression_to_firm(expression);
3403                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3404                 assert(is_Const(res));
3405                 if (is_Const_null(res)) {
3406                         return new_Const_long(mode, 0);
3407                 } else {
3408                         return new_Const_long(mode, 1);
3409                 }
3410         }
3411
3412         /* we have to produce a 0/1 from the mode_b expression */
3413         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3414         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3415         return produce_condition_result(expression, mode, dbgi);
3416 }
3417
3418 /**
3419  * create a short-circuit expression evaluation that tries to construct
3420  * efficient control flow structures for &&, || and ! expressions
3421  */
3422 static ir_node *create_condition_evaluation(const expression_t *expression,
3423                                             ir_node *true_block,
3424                                             ir_node *false_block)
3425 {
3426         switch(expression->kind) {
3427         case EXPR_UNARY_NOT: {
3428                 const unary_expression_t *unary_expression = &expression->unary;
3429                 create_condition_evaluation(unary_expression->value, false_block,
3430                                             true_block);
3431                 return NULL;
3432         }
3433         case EXPR_BINARY_LOGICAL_AND: {
3434                 const binary_expression_t *binary_expression = &expression->binary;
3435
3436                 ir_node *extra_block = new_immBlock();
3437                 create_condition_evaluation(binary_expression->left, extra_block,
3438                                             false_block);
3439                 mature_immBlock(extra_block);
3440                 set_cur_block(extra_block);
3441                 create_condition_evaluation(binary_expression->right, true_block,
3442                                             false_block);
3443                 return NULL;
3444         }
3445         case EXPR_BINARY_LOGICAL_OR: {
3446                 const binary_expression_t *binary_expression = &expression->binary;
3447
3448                 ir_node *extra_block = new_immBlock();
3449                 create_condition_evaluation(binary_expression->left, true_block,
3450                                             extra_block);
3451                 mature_immBlock(extra_block);
3452                 set_cur_block(extra_block);
3453                 create_condition_evaluation(binary_expression->right, true_block,
3454                                             false_block);
3455                 return NULL;
3456         }
3457         default:
3458                 break;
3459         }
3460
3461         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3462         ir_node  *cond_expr  = _expression_to_firm(expression);
3463         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3464         ir_node  *cond       = new_d_Cond(dbgi, condition);
3465         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3466         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3467
3468         /* set branch prediction info based on __builtin_expect */
3469         if (is_builtin_expect(expression) && is_Cond(cond)) {
3470                 call_argument_t *argument = expression->call.arguments->next;
3471                 if (is_constant_expression(argument->expression)) {
3472                         long               cnst = fold_constant(argument->expression);
3473                         cond_jmp_predicate pred;
3474
3475                         if (cnst == 0) {
3476                                 pred = COND_JMP_PRED_FALSE;
3477                         } else {
3478                                 pred = COND_JMP_PRED_TRUE;
3479                         }
3480                         set_Cond_jmp_pred(cond, pred);
3481                 }
3482         }
3483
3484         add_immBlock_pred(true_block, true_proj);
3485         add_immBlock_pred(false_block, false_proj);
3486
3487         set_cur_block(NULL);
3488         return cond_expr;
3489 }
3490
3491
3492 static void create_variable_entity(entity_t *variable,
3493                                    declaration_kind_t declaration_kind,
3494                                    ir_type *parent_type)
3495 {
3496         assert(variable->kind == ENTITY_VARIABLE);
3497         type_t    *type = skip_typeref(variable->declaration.type);
3498         type            = get_aligned_type(type, variable->variable.alignment);
3499
3500         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3501         ir_type   *const irtype   = get_ir_type(type);
3502         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3503
3504         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3505
3506         handle_gnu_attributes_ent(irentity, variable);
3507
3508         variable->declaration.kind  = (unsigned char) declaration_kind;
3509         variable->variable.v.entity = irentity;
3510         set_entity_variability(irentity, variability_uninitialized);
3511         set_entity_ld_ident(irentity, create_ld_ident(variable));
3512
3513         if (parent_type == get_tls_type())
3514                 set_entity_allocation(irentity, allocation_automatic);
3515         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3516                 set_entity_allocation(irentity, allocation_static);
3517
3518         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3519                 set_entity_volatility(irentity, volatility_is_volatile);
3520         }
3521 }
3522
3523
3524 typedef struct type_path_entry_t type_path_entry_t;
3525 struct type_path_entry_t {
3526         type_t           *type;
3527         ir_initializer_t *initializer;
3528         size_t            index;
3529         entity_t         *compound_entry;
3530 };
3531
3532 typedef struct type_path_t type_path_t;
3533 struct type_path_t {
3534         type_path_entry_t *path;
3535         type_t            *top_type;
3536         bool               invalid;
3537 };
3538
3539 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3540 {
3541         size_t len = ARR_LEN(path->path);
3542
3543         for (size_t i = 0; i < len; ++i) {
3544                 const type_path_entry_t *entry = & path->path[i];
3545
3546                 type_t *type = skip_typeref(entry->type);
3547                 if (is_type_compound(type)) {
3548                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3549                 } else if (is_type_array(type)) {
3550                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3551                 } else {
3552                         fprintf(stderr, "-INVALID-");
3553                 }
3554         }
3555         fprintf(stderr, "  (");
3556         print_type(path->top_type);
3557         fprintf(stderr, ")");
3558 }
3559
3560 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3561 {
3562         size_t len = ARR_LEN(path->path);
3563         assert(len > 0);
3564         return & path->path[len-1];
3565 }
3566
3567 static type_path_entry_t *append_to_type_path(type_path_t *path)
3568 {
3569         size_t len = ARR_LEN(path->path);
3570         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3571
3572         type_path_entry_t *result = & path->path[len];
3573         memset(result, 0, sizeof(result[0]));
3574         return result;
3575 }
3576
3577 static size_t get_compound_member_count(const compound_type_t *type)
3578 {
3579         compound_t *compound  = type->compound;
3580         size_t      n_members = 0;
3581         entity_t   *member    = compound->members.entities;
3582         for ( ; member != NULL; member = member->base.next) {
3583                 ++n_members;
3584         }
3585
3586         return n_members;
3587 }
3588
3589 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3590 {
3591         type_t *orig_top_type = path->top_type;
3592         type_t *top_type      = skip_typeref(orig_top_type);
3593
3594         assert(is_type_compound(top_type) || is_type_array(top_type));
3595
3596         if (ARR_LEN(path->path) == 0) {
3597                 return NULL;
3598         } else {
3599                 type_path_entry_t *top         = get_type_path_top(path);
3600                 ir_initializer_t  *initializer = top->initializer;
3601                 return get_initializer_compound_value(initializer, top->index);
3602         }
3603 }
3604
3605 static void descend_into_subtype(type_path_t *path)
3606 {
3607         type_t *orig_top_type = path->top_type;
3608         type_t *top_type      = skip_typeref(orig_top_type);
3609
3610         assert(is_type_compound(top_type) || is_type_array(top_type));
3611
3612         ir_initializer_t *initializer = get_initializer_entry(path);
3613
3614         type_path_entry_t *top = append_to_type_path(path);
3615         top->type              = top_type;
3616
3617         size_t len;
3618
3619         if (is_type_compound(top_type)) {
3620                 compound_t *compound = top_type->compound.compound;
3621                 entity_t   *entry    = compound->members.entities;
3622
3623                 top->compound_entry = entry;
3624                 top->index          = 0;
3625                 len                 = get_compound_member_count(&top_type->compound);
3626                 if (entry != NULL) {
3627                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3628                         path->top_type = entry->declaration.type;
3629                 }
3630         } else {
3631                 assert(is_type_array(top_type));
3632                 assert(top_type->array.size > 0);
3633
3634                 top->index     = 0;
3635                 path->top_type = top_type->array.element_type;
3636                 len            = top_type->array.size;
3637         }
3638         if (initializer == NULL
3639                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3640                 initializer = create_initializer_compound(len);
3641                 /* we have to set the entry at the 2nd latest path entry... */
3642                 size_t path_len = ARR_LEN(path->path);
3643                 assert(path_len >= 1);
3644                 if (path_len > 1) {
3645                         type_path_entry_t *entry        = & path->path[path_len-2];
3646                         ir_initializer_t  *tinitializer = entry->initializer;
3647                         set_initializer_compound_value(tinitializer, entry->index,
3648                                                        initializer);
3649                 }
3650         }
3651         top->initializer = initializer;
3652 }
3653
3654 static void ascend_from_subtype(type_path_t *path)
3655 {
3656         type_path_entry_t *top = get_type_path_top(path);
3657
3658         path->top_type = top->type;
3659
3660         size_t len = ARR_LEN(path->path);
3661         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3662 }
3663
3664 static void walk_designator(type_path_t *path, const designator_t *designator)
3665 {
3666         /* designators start at current object type */
3667         ARR_RESIZE(type_path_entry_t, path->path, 1);
3668
3669         for ( ; designator != NULL; designator = designator->next) {
3670                 type_path_entry_t *top         = get_type_path_top(path);
3671                 type_t            *orig_type   = top->type;
3672                 type_t            *type        = skip_typeref(orig_type);
3673
3674                 if (designator->symbol != NULL) {
3675                         assert(is_type_compound(type));
3676                         size_t    index  = 0;
3677                         symbol_t *symbol = designator->symbol;
3678
3679                         compound_t *compound = type->compound.compound;
3680                         entity_t   *iter     = compound->members.entities;
3681                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3682                                 if (iter->base.symbol == symbol) {
3683                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3684                                         break;
3685                                 }
3686                         }
3687                         assert(iter != NULL);
3688
3689                         top->type           = orig_type;
3690                         top->compound_entry = iter;
3691                         top->index          = index;
3692                         orig_type           = iter->declaration.type;
3693                 } else {
3694                         expression_t *array_index = designator->array_index;
3695                         assert(designator->array_index != NULL);
3696                         assert(is_type_array(type));
3697
3698                         long index = fold_constant(array_index);
3699                         assert(index >= 0);
3700 #ifndef NDEBUG
3701                         if (type->array.size_constant) {
3702                                 long array_size = type->array.size;
3703                                 assert(index < array_size);
3704                         }
3705 #endif
3706
3707                         top->type  = orig_type;
3708                         top->index = (size_t) index;
3709                         orig_type  = type->array.element_type;
3710                 }
3711                 path->top_type = orig_type;
3712
3713                 if (designator->next != NULL) {
3714                         descend_into_subtype(path);
3715                 }
3716         }
3717
3718         path->invalid  = false;
3719 }
3720
3721 static void advance_current_object(type_path_t *path)
3722 {
3723         if (path->invalid) {
3724                 /* TODO: handle this... */
3725                 panic("invalid initializer in ast2firm (excessive elements)");
3726         }
3727
3728         type_path_entry_t *top = get_type_path_top(path);
3729
3730         type_t *type = skip_typeref(top->type);
3731         if (is_type_union(type)) {
3732                 top->compound_entry = NULL;
3733         } else if (is_type_struct(type)) {
3734                 entity_t *entry = top->compound_entry;
3735
3736                 top->index++;
3737                 entry               = entry->base.next;
3738                 top->compound_entry = entry;
3739                 if (entry != NULL) {
3740                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3741                         path->top_type = entry->declaration.type;
3742                         return;
3743                 }
3744         } else {
3745                 assert(is_type_array(type));
3746
3747                 top->index++;
3748                 if (!type->array.size_constant || top->index < type->array.size) {
3749                         return;
3750                 }
3751         }
3752
3753         /* we're past the last member of the current sub-aggregate, try if we
3754          * can ascend in the type hierarchy and continue with another subobject */
3755         size_t len = ARR_LEN(path->path);
3756
3757         if (len > 1) {
3758                 ascend_from_subtype(path);
3759                 advance_current_object(path);
3760         } else {
3761                 path->invalid = true;
3762         }
3763 }
3764
3765
3766 static ir_initializer_t *create_ir_initializer(
3767                 const initializer_t *initializer, type_t *type);
3768
3769 static ir_initializer_t *create_ir_initializer_value(
3770                 const initializer_value_t *initializer)
3771 {
3772         if (is_type_compound(initializer->value->base.type)) {
3773                 panic("initializer creation for compounds not implemented yet");
3774         }
3775         ir_node *value = expression_to_firm(initializer->value);
3776         type_t  *type  = initializer->value->base.type;
3777         ir_mode *mode  = get_ir_mode_storage(type);
3778         value          = create_conv(NULL, value, mode);
3779         return create_initializer_const(value);
3780 }
3781
3782 /** test wether type can be initialized by a string constant */
3783 static bool is_string_type(type_t *type)
3784 {
3785         type_t *inner;
3786         if (is_type_pointer(type)) {
3787                 inner = skip_typeref(type->pointer.points_to);
3788         } else if(is_type_array(type)) {
3789                 inner = skip_typeref(type->array.element_type);
3790         } else {
3791                 return false;
3792         }
3793
3794         return is_type_integer(inner);
3795 }
3796
3797 static ir_initializer_t *create_ir_initializer_list(
3798                 const initializer_list_t *initializer, type_t *type)
3799 {
3800         type_path_t path;
3801         memset(&path, 0, sizeof(path));
3802         path.top_type = type;
3803         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3804
3805         descend_into_subtype(&path);
3806
3807         for (size_t i = 0; i < initializer->len; ++i) {
3808                 const initializer_t *sub_initializer = initializer->initializers[i];
3809
3810                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3811                         walk_designator(&path, sub_initializer->designator.designator);
3812                         continue;
3813                 }
3814
3815                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3816                         /* we might have to descend into types until we're at a scalar
3817                          * type */
3818                         while(true) {
3819                                 type_t *orig_top_type = path.top_type;
3820                                 type_t *top_type      = skip_typeref(orig_top_type);
3821
3822                                 if (is_type_scalar(top_type))
3823                                         break;
3824                                 descend_into_subtype(&path);
3825                         }
3826                 } else if (sub_initializer->kind == INITIALIZER_STRING
3827                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3828                         /* we might have to descend into types until we're at a scalar
3829                          * type */
3830                         while (true) {
3831                                 type_t *orig_top_type = path.top_type;
3832                                 type_t *top_type      = skip_typeref(orig_top_type);
3833
3834                                 if (is_string_type(top_type))
3835                                         break;
3836                                 descend_into_subtype(&path);
3837                         }
3838                 }
3839
3840                 ir_initializer_t *sub_irinitializer
3841                         = create_ir_initializer(sub_initializer, path.top_type);
3842
3843                 size_t path_len = ARR_LEN(path.path);
3844                 assert(path_len >= 1);
3845                 type_path_entry_t *entry        = & path.path[path_len-1];
3846                 ir_initializer_t  *tinitializer = entry->initializer;
3847                 set_initializer_compound_value(tinitializer, entry->index,
3848                                                sub_irinitializer);
3849
3850                 advance_current_object(&path);
3851         }
3852
3853         assert(ARR_LEN(path.path) >= 1);
3854         ir_initializer_t *result = path.path[0].initializer;
3855         DEL_ARR_F(path.path);
3856
3857         return result;
3858 }
3859
3860 static ir_initializer_t *create_ir_initializer_string(
3861                 const initializer_string_t *initializer, type_t *type)
3862 {
3863         type = skip_typeref(type);
3864
3865         size_t            string_len    = initializer->string.size;
3866         assert(type->kind == TYPE_ARRAY);
3867         assert(type->array.size_constant);
3868         size_t            len           = type->array.size;
3869         ir_initializer_t *irinitializer = create_initializer_compound(len);
3870
3871         const char *string = initializer->string.begin;
3872         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3873
3874         for (size_t i = 0; i < len; ++i) {
3875                 char c = 0;
3876                 if (i < string_len)
3877                         c = string[i];
3878
3879                 tarval           *tv = new_tarval_from_long(c, mode);
3880                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3881
3882                 set_initializer_compound_value(irinitializer, i, char_initializer);
3883         }
3884
3885         return irinitializer;
3886 }
3887
3888 static ir_initializer_t *create_ir_initializer_wide_string(
3889                 const initializer_wide_string_t *initializer, type_t *type)
3890 {
3891         size_t            string_len    = initializer->string.size;
3892         assert(type->kind == TYPE_ARRAY);
3893         assert(type->array.size_constant);
3894         size_t            len           = type->array.size;
3895         ir_initializer_t *irinitializer = create_initializer_compound(len);
3896
3897         const wchar_rep_t *string = initializer->string.begin;
3898         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3899
3900         for (size_t i = 0; i < len; ++i) {
3901                 wchar_rep_t c = 0;
3902                 if (i < string_len) {
3903                         c = string[i];
3904                 }
3905                 tarval *tv = new_tarval_from_long(c, mode);
3906                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3907
3908                 set_initializer_compound_value(irinitializer, i, char_initializer);
3909         }
3910
3911         return irinitializer;
3912 }
3913
3914 static ir_initializer_t *create_ir_initializer(
3915                 const initializer_t *initializer, type_t *type)
3916 {
3917         switch(initializer->kind) {
3918                 case INITIALIZER_STRING:
3919                         return create_ir_initializer_string(&initializer->string, type);
3920
3921                 case INITIALIZER_WIDE_STRING:
3922                         return create_ir_initializer_wide_string(&initializer->wide_string,
3923                                                                  type);
3924
3925                 case INITIALIZER_LIST:
3926                         return create_ir_initializer_list(&initializer->list, type);
3927
3928                 case INITIALIZER_VALUE:
3929                         return create_ir_initializer_value(&initializer->value);
3930
3931                 case INITIALIZER_DESIGNATOR:
3932                         panic("unexpected designator initializer found");
3933         }
3934         panic("unknown initializer");
3935 }
3936
3937 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3938                 ir_node *base_addr)
3939 {
3940         if (is_atomic_type(type)) {
3941                 ir_mode *mode = get_type_mode(type);
3942                 tarval  *zero = get_mode_null(mode);
3943                 ir_node *cnst = new_d_Const(dbgi, zero);
3944
3945                 /* TODO: bitfields */
3946                 ir_node *mem    = get_store();
3947                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3948                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3949                 set_store(proj_m);
3950         } else {
3951                 assert(is_compound_type(type));
3952
3953                 int n_members;
3954                 if (is_Array_type(type)) {
3955                         assert(has_array_upper_bound(type, 0));
3956                         n_members = get_array_upper_bound_int(type, 0);
3957                 } else {
3958                         n_members = get_compound_n_members(type);
3959                 }
3960
3961                 for (int i = 0; i < n_members; ++i) {
3962                         ir_node *addr;
3963                         ir_type *irtype;
3964                         if (is_Array_type(type)) {
3965                                 ir_entity *entity   = get_array_element_entity(type);
3966                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3967                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3968                                 ir_node   *in[1]    = { cnst };
3969                                 irtype = get_array_element_type(type);
3970                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3971                         } else {
3972                                 ir_entity *member = get_compound_member(type, i);
3973
3974                                 irtype = get_entity_type(member);
3975                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3976                         }
3977
3978                         create_dynamic_null_initializer(irtype, dbgi, addr);
3979                 }
3980         }
3981 }
3982
3983 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3984                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3985 {
3986         switch(get_initializer_kind(initializer)) {
3987         case IR_INITIALIZER_NULL: {
3988                 create_dynamic_null_initializer(type, dbgi, base_addr);
3989                 return;
3990         }
3991         case IR_INITIALIZER_CONST: {
3992                 ir_node *node     = get_initializer_const_value(initializer);
3993                 ir_mode *mode     = get_irn_mode(node);
3994                 ir_type *ent_type = get_entity_type(entity);
3995
3996                 /* is it a bitfield type? */
3997                 if (is_Primitive_type(ent_type) &&
3998                                 get_primitive_base_type(ent_type) != NULL) {
3999                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4000                         return;
4001                 }
4002
4003                 assert(get_type_mode(type) == mode);
4004                 ir_node *mem    = get_store();
4005                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4006                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4007                 set_store(proj_m);
4008                 return;
4009         }
4010         case IR_INITIALIZER_TARVAL: {
4011                 tarval  *tv       = get_initializer_tarval_value(initializer);
4012                 ir_mode *mode     = get_tarval_mode(tv);
4013                 ir_node *cnst     = new_d_Const(dbgi, tv);
4014                 ir_type *ent_type = get_entity_type(entity);
4015
4016                 /* is it a bitfield type? */
4017                 if (is_Primitive_type(ent_type) &&
4018                                 get_primitive_base_type(ent_type) != NULL) {
4019                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4020                         return;
4021                 }
4022
4023                 assert(get_type_mode(type) == mode);
4024                 ir_node *mem    = get_store();
4025                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4026                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4027                 set_store(proj_m);
4028                 return;
4029         }
4030         case IR_INITIALIZER_COMPOUND: {
4031                 assert(is_compound_type(type));
4032                 int n_members;
4033                 if (is_Array_type(type)) {
4034                         assert(has_array_upper_bound(type, 0));
4035                         n_members = get_array_upper_bound_int(type, 0);
4036                 } else {
4037                         n_members = get_compound_n_members(type);
4038                 }
4039
4040                 if (get_initializer_compound_n_entries(initializer)
4041                                 != (unsigned) n_members)
4042                         panic("initializer doesn't match compound type");
4043
4044                 for (int i = 0; i < n_members; ++i) {
4045                         ir_node   *addr;
4046                         ir_type   *irtype;
4047                         ir_entity *sub_entity;
4048                         if (is_Array_type(type)) {
4049                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4050                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4051                                 ir_node   *in[1]    = { cnst };
4052                                 irtype     = get_array_element_type(type);
4053                                 sub_entity = get_array_element_entity(type);
4054                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4055                                                        sub_entity);
4056                         } else {
4057                                 sub_entity = get_compound_member(type, i);
4058                                 irtype     = get_entity_type(sub_entity);
4059                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4060                                                              sub_entity);
4061                         }
4062
4063                         ir_initializer_t *sub_init
4064                                 = get_initializer_compound_value(initializer, i);
4065
4066                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4067                                                        addr);
4068                 }
4069                 return;
4070         }
4071         }
4072
4073         panic("invalid IR_INITIALIZER found");
4074 }
4075
4076 static void create_dynamic_initializer(ir_initializer_t *initializer,
4077                 dbg_info *dbgi, ir_entity *entity)
4078 {
4079         ir_node *frame     = get_local_frame(entity);
4080         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4081         ir_type *type      = get_entity_type(entity);
4082
4083         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4084 }
4085
4086 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4087                                      ir_entity *entity, type_t *type)
4088 {
4089         ir_node *memory = get_store();
4090         ir_node *nomem  = new_NoMem();
4091         ir_node *frame  = get_irg_frame(current_ir_graph);
4092         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4093
4094         if (initializer->kind == INITIALIZER_VALUE) {
4095                 initializer_value_t *initializer_value = &initializer->value;
4096
4097                 ir_node *value = expression_to_firm(initializer_value->value);
4098                 type = skip_typeref(type);
4099                 assign_value(dbgi, addr, type, value);
4100                 return;
4101         }
4102
4103         if (!is_constant_initializer(initializer)) {
4104                 ir_initializer_t *irinitializer
4105                         = create_ir_initializer(initializer, type);
4106
4107                 create_dynamic_initializer(irinitializer, dbgi, entity);
4108                 return;
4109         }
4110
4111         /* create the ir_initializer */
4112         ir_graph *const old_current_ir_graph = current_ir_graph;
4113         current_ir_graph = get_const_code_irg();
4114
4115         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4116
4117         assert(current_ir_graph == get_const_code_irg());
4118         current_ir_graph = old_current_ir_graph;
4119
4120         /* create a "template" entity which is copied to the entity on the stack */
4121         ident     *const id          = id_unique("initializer.%u");
4122         ir_type   *const irtype      = get_ir_type(type);
4123         ir_type   *const global_type = get_glob_type();
4124         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4125         set_entity_ld_ident(init_entity, id);
4126
4127         set_entity_variability(init_entity, variability_initialized);
4128         set_entity_visibility(init_entity, visibility_local);
4129         set_entity_allocation(init_entity, allocation_static);
4130
4131         set_entity_initializer(init_entity, irinitializer);
4132
4133         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4134         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4135
4136         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4137         set_store(copyb_mem);
4138 }
4139
4140 static void create_initializer_local_variable_entity(entity_t *entity)
4141 {
4142         assert(entity->kind == ENTITY_VARIABLE);
4143         initializer_t *initializer = entity->variable.initializer;
4144         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4145         ir_entity     *irentity    = entity->variable.v.entity;
4146         type_t        *type        = entity->declaration.type;
4147
4148         type = get_aligned_type(type, entity->variable.alignment);
4149         create_local_initializer(initializer, dbgi, irentity, type);
4150 }
4151
4152 static void create_variable_initializer(entity_t *entity)
4153 {
4154         assert(entity->kind == ENTITY_VARIABLE);
4155         initializer_t *initializer = entity->variable.initializer;
4156         if (initializer == NULL)
4157                 return;
4158
4159         declaration_kind_t declaration_kind
4160                 = (declaration_kind_t) entity->declaration.kind;
4161         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4162                 create_initializer_local_variable_entity(entity);
4163                 return;
4164         }
4165
4166         type_t            *type = entity->declaration.type;
4167         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4168
4169         if (initializer->kind == INITIALIZER_VALUE) {
4170                 initializer_value_t *initializer_value = &initializer->value;
4171                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4172
4173                 ir_node *value = expression_to_firm(initializer_value->value);
4174
4175                 type_t  *type = initializer_value->value->base.type;
4176                 ir_mode *mode = get_ir_mode_storage(type);
4177                 value = create_conv(dbgi, value, mode);
4178                 value = do_strict_conv(dbgi, value);
4179
4180                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4181                         set_value(entity->variable.v.value_number, value);
4182                 } else {
4183                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4184
4185                         ir_entity *irentity = entity->variable.v.entity;
4186
4187                         if (tq & TYPE_QUALIFIER_CONST) {
4188                                 set_entity_variability(irentity, variability_constant);
4189                         } else {
4190                                 set_entity_variability(irentity, variability_initialized);
4191                         }
4192                         set_atomic_ent_value(irentity, value);
4193                 }
4194         } else {
4195                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4196                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4197
4198                 ir_entity        *irentity        = entity->variable.v.entity;
4199                 ir_initializer_t *irinitializer
4200                         = create_ir_initializer(initializer, type);
4201
4202                 if (tq & TYPE_QUALIFIER_CONST) {
4203                         set_entity_variability(irentity, variability_constant);
4204                 } else {
4205                         set_entity_variability(irentity, variability_initialized);
4206                 }
4207                 set_entity_initializer(irentity, irinitializer);
4208         }
4209 }
4210
4211 static void create_variable_length_array(entity_t *entity)
4212 {
4213         assert(entity->kind == ENTITY_VARIABLE);
4214         assert(entity->variable.initializer == NULL);
4215
4216         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4217         entity->variable.v.vla_base = NULL;
4218
4219         /* TODO: record VLA somewhere so we create the free node when we leave
4220          * it's scope */
4221 }
4222
4223 static void allocate_variable_length_array(entity_t *entity)
4224 {
4225         assert(entity->kind == ENTITY_VARIABLE);
4226         assert(entity->variable.initializer == NULL);
4227         assert(get_cur_block() != NULL);
4228
4229         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4230         type_t   *type      = entity->declaration.type;
4231         ir_type  *el_type   = get_ir_type(type->array.element_type);
4232
4233         /* make sure size_node is calculated */
4234         get_type_size(type);
4235         ir_node  *elems = type->array.size_node;
4236         ir_node  *mem   = get_store();
4237         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4238
4239         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4240         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4241         set_store(proj_m);
4242
4243         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4244         entity->variable.v.vla_base = addr;
4245 }
4246
4247 /**
4248  * Creates a Firm local variable from a declaration.
4249  */
4250 static void create_local_variable(entity_t *entity)
4251 {
4252         assert(entity->kind == ENTITY_VARIABLE);
4253         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4254
4255         bool needs_entity = entity->variable.address_taken;
4256         type_t *type = skip_typeref(entity->declaration.type);
4257
4258         /* is it a variable length array? */
4259         if (is_type_array(type) && !type->array.size_constant) {
4260                 create_variable_length_array(entity);
4261                 return;
4262         } else if (is_type_array(type) || is_type_compound(type)) {
4263                 needs_entity = true;
4264         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4265                 needs_entity = true;
4266         }
4267
4268         if (needs_entity) {
4269                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4270                 create_variable_entity(entity,
4271                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4272                                        frame_type);
4273         } else {
4274                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4275                 entity->variable.v.value_number = next_value_number_function;
4276                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4277                                         entity);
4278                 ++next_value_number_function;
4279         }
4280 }
4281
4282 static void create_local_static_variable(entity_t *entity)
4283 {
4284         assert(entity->kind == ENTITY_VARIABLE);
4285         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4286
4287         type_t    *type = skip_typeref(entity->declaration.type);
4288         type            = get_aligned_type(type, entity->variable.alignment);
4289
4290         ir_type   *const var_type = entity->variable.thread_local ?
4291                 get_tls_type() : get_glob_type();
4292         ir_type   *const irtype   = get_ir_type(type);
4293         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4294
4295         size_t l = strlen(entity->base.symbol->string);
4296         char   buf[l + sizeof(".%u")];
4297         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4298         ident     *const id = id_unique(buf);
4299
4300         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4301
4302         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4303                 set_entity_volatility(irentity, volatility_is_volatile);
4304         }
4305
4306         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4307         entity->variable.v.entity = irentity;
4308
4309         set_entity_ld_ident(irentity, id);
4310         set_entity_variability(irentity, variability_uninitialized);
4311         set_entity_visibility(irentity, visibility_local);
4312         set_entity_allocation(irentity, entity->variable.thread_local ?
4313                 allocation_automatic : allocation_static);
4314
4315         ir_graph *const old_current_ir_graph = current_ir_graph;
4316         current_ir_graph = get_const_code_irg();
4317
4318         create_variable_initializer(entity);
4319
4320         assert(current_ir_graph == get_const_code_irg());
4321         current_ir_graph = old_current_ir_graph;
4322 }
4323
4324
4325
4326 static void return_statement_to_firm(return_statement_t *statement)
4327 {
4328         if (get_cur_block() == NULL)
4329                 return;
4330
4331         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4332         type_t   *type        = current_function_entity->declaration.type;
4333         ir_type  *func_irtype = get_ir_type(type);
4334
4335
4336         ir_node *in[1];
4337         int      in_len;
4338         if (get_method_n_ress(func_irtype) > 0) {
4339                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4340
4341                 if (statement->value != NULL) {
4342                         ir_node *node = expression_to_firm(statement->value);
4343                         if (!is_compound_type(res_type)) {
4344                                 type_t  *type = statement->value->base.type;
4345                                 ir_mode *mode = get_ir_mode_storage(type);
4346                                 node          = create_conv(dbgi, node, mode);
4347                                 node          = do_strict_conv(dbgi, node);
4348                         }
4349                         in[0] = node;
4350                 } else {
4351                         ir_mode *mode;
4352                         if (is_compound_type(res_type)) {
4353                                 mode = mode_P_data;
4354                         } else {
4355                                 mode = get_type_mode(res_type);
4356                         }
4357                         in[0] = new_Unknown(mode);
4358                 }
4359                 in_len = 1;
4360         } else {
4361                 /* build return_value for its side effects */
4362                 if (statement->value != NULL) {
4363                         expression_to_firm(statement->value);
4364                 }
4365                 in_len = 0;
4366         }
4367
4368         ir_node  *store = get_store();
4369         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4370
4371         ir_node *end_block = get_irg_end_block(current_ir_graph);
4372         add_immBlock_pred(end_block, ret);
4373
4374         set_cur_block(NULL);
4375 }
4376
4377 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4378 {
4379         if (get_cur_block() == NULL)
4380                 return NULL;
4381
4382         return expression_to_firm(statement->expression);
4383 }
4384
4385 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4386 {
4387         entity_t *entity = compound->scope.entities;
4388         for ( ; entity != NULL; entity = entity->base.next) {
4389                 if (!is_declaration(entity))
4390                         continue;
4391
4392                 create_local_declaration(entity);
4393         }
4394
4395         ir_node     *result    = NULL;
4396         statement_t *statement = compound->statements;
4397         for ( ; statement != NULL; statement = statement->base.next) {
4398                 if (statement->base.next == NULL
4399                                 && statement->kind == STATEMENT_EXPRESSION) {
4400                         result = expression_statement_to_firm(
4401                                         &statement->expression);
4402                         break;
4403                 }
4404                 statement_to_firm(statement);
4405         }
4406
4407         return result;
4408 }
4409
4410 static void create_global_variable(entity_t *entity)
4411 {
4412         assert(entity->kind == ENTITY_VARIABLE);
4413
4414         ir_visibility vis;
4415         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4416                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4417                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4418                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4419
4420                 default: panic("Invalid storage class for global variable");
4421         }
4422
4423         ir_type *var_type = entity->variable.thread_local ?
4424                 get_tls_type() : get_glob_type();
4425         create_variable_entity(entity,
4426                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4427         set_entity_visibility(entity->variable.v.entity, vis);
4428 }
4429
4430 static void create_local_declaration(entity_t *entity)
4431 {
4432         assert(is_declaration(entity));
4433
4434         /* construct type */
4435         (void) get_ir_type(entity->declaration.type);
4436         if (entity->base.symbol == NULL) {
4437                 return;
4438         }
4439
4440         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4441         case STORAGE_CLASS_STATIC:
4442                 create_local_static_variable(entity);
4443                 return;
4444         case STORAGE_CLASS_EXTERN:
4445                 if (entity->kind == ENTITY_FUNCTION) {
4446                         assert(entity->function.statement == NULL);
4447                         get_function_entity(entity);
4448                 } else {
4449                         create_global_variable(entity);
4450                         create_variable_initializer(entity);
4451                 }
4452                 return;
4453         case STORAGE_CLASS_NONE:
4454         case STORAGE_CLASS_AUTO:
4455         case STORAGE_CLASS_REGISTER:
4456                 if (entity->kind == ENTITY_FUNCTION) {
4457                         if (entity->function.statement != NULL) {
4458                                 get_function_entity(entity);
4459                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4460                                 enqueue_inner_function(entity);
4461                         } else {
4462                                 get_function_entity(entity);
4463                         }
4464                 } else {
4465                         create_local_variable(entity);
4466                 }
4467                 return;
4468         case STORAGE_CLASS_TYPEDEF:
4469                 break;
4470         }
4471         panic("invalid storage class found");
4472 }
4473
4474 static void initialize_local_declaration(entity_t *entity)
4475 {
4476         if (entity->base.symbol == NULL)
4477                 return;
4478
4479         switch ((declaration_kind_t) entity->declaration.kind) {
4480         case DECLARATION_KIND_LOCAL_VARIABLE:
4481         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4482                 create_variable_initializer(entity);
4483                 return;
4484
4485         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4486                 allocate_variable_length_array(entity);
4487                 return;
4488
4489         case DECLARATION_KIND_COMPOUND_MEMBER:
4490         case DECLARATION_KIND_GLOBAL_VARIABLE:
4491         case DECLARATION_KIND_FUNCTION:
4492         case DECLARATION_KIND_INNER_FUNCTION:
4493                 return;
4494
4495         case DECLARATION_KIND_PARAMETER:
4496         case DECLARATION_KIND_PARAMETER_ENTITY:
4497                 panic("can't initialize parameters");
4498
4499         case DECLARATION_KIND_UNKNOWN:
4500                 panic("can't initialize unknown declaration");
4501         }
4502         panic("invalid declaration kind");
4503 }
4504
4505 static void declaration_statement_to_firm(declaration_statement_t *statement)
4506 {
4507         entity_t *entity = statement->declarations_begin;
4508         if (entity == NULL)
4509                 return;
4510
4511         entity_t *const last = statement->declarations_end;
4512         for ( ;; entity = entity->base.next) {
4513                 if (is_declaration(entity)) {
4514                         initialize_local_declaration(entity);
4515                 } else if (entity->kind == ENTITY_TYPEDEF) {
4516                         type_t *const type = skip_typeref(entity->typedefe.type);
4517                         if (is_type_array(type) && type->array.is_vla)
4518                                 get_vla_size(&type->array);
4519                 }
4520                 if (entity == last)
4521                         break;
4522         }
4523 }
4524
4525 static void if_statement_to_firm(if_statement_t *statement)
4526 {
4527         ir_node *cur_block = get_cur_block();
4528
4529         ir_node *fallthrough_block = NULL;
4530
4531         /* the true (blocks) */
4532         ir_node *true_block = NULL;
4533         if (statement->true_statement != NULL) {
4534                 true_block = new_immBlock();
4535                 set_cur_block(true_block);
4536                 statement_to_firm(statement->true_statement);
4537                 if (get_cur_block() != NULL) {
4538                         ir_node *jmp = new_Jmp();
4539                         if (fallthrough_block == NULL)
4540                                 fallthrough_block = new_immBlock();
4541                         add_immBlock_pred(fallthrough_block, jmp);
4542                 }
4543         }
4544
4545         /* the false (blocks) */
4546         ir_node *false_block = NULL;
4547         if (statement->false_statement != NULL) {
4548                 false_block = new_immBlock();
4549                 set_cur_block(false_block);
4550
4551                 statement_to_firm(statement->false_statement);
4552                 if (get_cur_block() != NULL) {
4553                         ir_node *jmp = new_Jmp();
4554                         if (fallthrough_block == NULL)
4555                                 fallthrough_block = new_immBlock();
4556                         add_immBlock_pred(fallthrough_block, jmp);
4557                 }
4558         }
4559
4560         /* create the condition */
4561         if (cur_block != NULL) {
4562                 if (true_block == NULL || false_block == NULL) {
4563                         if (fallthrough_block == NULL)
4564                                 fallthrough_block = new_immBlock();
4565                         if (true_block == NULL)
4566                                 true_block = fallthrough_block;
4567                         if (false_block == NULL)
4568                                 false_block = fallthrough_block;
4569                 }
4570
4571                 set_cur_block(cur_block);
4572                 create_condition_evaluation(statement->condition, true_block,
4573                                             false_block);
4574         }
4575
4576         mature_immBlock(true_block);
4577         if (false_block != fallthrough_block && false_block != NULL) {
4578                 mature_immBlock(false_block);
4579         }
4580         if (fallthrough_block != NULL) {
4581                 mature_immBlock(fallthrough_block);
4582         }
4583
4584         set_cur_block(fallthrough_block);
4585 }
4586
4587 static void while_statement_to_firm(while_statement_t *statement)
4588 {
4589         ir_node *jmp = NULL;
4590         if (get_cur_block() != NULL) {
4591                 jmp = new_Jmp();
4592         }
4593
4594         /* create the header block */
4595         ir_node *header_block = new_immBlock();
4596         if (jmp != NULL) {
4597                 add_immBlock_pred(header_block, jmp);
4598         }
4599
4600         /* the loop body */
4601         ir_node *old_continue_label = continue_label;
4602         ir_node *old_break_label    = break_label;
4603         continue_label              = header_block;
4604         break_label                 = NULL;
4605
4606         ir_node *body_block = new_immBlock();
4607         set_cur_block(body_block);
4608         statement_to_firm(statement->body);
4609         ir_node *false_block = break_label;
4610
4611         assert(continue_label == header_block);
4612         continue_label = old_continue_label;
4613         break_label    = old_break_label;
4614
4615         if (get_cur_block() != NULL) {
4616                 jmp = new_Jmp();
4617                 add_immBlock_pred(header_block, jmp);
4618         }
4619
4620         /* shortcut for while(true) */
4621         if (is_constant_expression(statement->condition)
4622                         && fold_constant(statement->condition) != 0) {
4623                 set_cur_block(header_block);
4624                 ir_node *header_jmp = new_Jmp();
4625                 add_immBlock_pred(body_block, header_jmp);
4626
4627                 keep_alive(body_block);
4628                 keep_all_memory(body_block);
4629                 set_cur_block(body_block);
4630         } else {
4631                 if (false_block == NULL) {
4632                         false_block = new_immBlock();
4633                 }
4634
4635                 /* create the condition */
4636                 set_cur_block(header_block);
4637
4638                 create_condition_evaluation(statement->condition, body_block,
4639                                             false_block);
4640         }
4641
4642         mature_immBlock(body_block);
4643         mature_immBlock(header_block);
4644         if (false_block != NULL) {
4645                 mature_immBlock(false_block);
4646         }
4647
4648         set_cur_block(false_block);
4649 }
4650
4651 static void do_while_statement_to_firm(do_while_statement_t *statement)
4652 {
4653         ir_node *jmp = NULL;
4654         if (get_cur_block() != NULL) {
4655                 jmp = new_Jmp();
4656         }
4657
4658         /* create the header block */
4659         ir_node *header_block = new_immBlock();
4660
4661         /* the loop body */
4662         ir_node *body_block = new_immBlock();
4663         if (jmp != NULL) {
4664                 add_immBlock_pred(body_block, jmp);
4665         }
4666
4667         ir_node *old_continue_label = continue_label;
4668         ir_node *old_break_label    = break_label;
4669         continue_label              = header_block;
4670         break_label                 = NULL;
4671
4672         set_cur_block(body_block);
4673         statement_to_firm(statement->body);
4674         ir_node *false_block = break_label;
4675
4676         assert(continue_label == header_block);
4677         continue_label = old_continue_label;
4678         break_label    = old_break_label;
4679
4680         if (get_cur_block() != NULL) {
4681                 ir_node *body_jmp = new_Jmp();
4682                 add_immBlock_pred(header_block, body_jmp);
4683                 mature_immBlock(header_block);
4684         }
4685
4686         if (false_block == NULL) {
4687                 false_block = new_immBlock();
4688         }
4689
4690         /* create the condition */
4691         set_cur_block(header_block);
4692
4693         create_condition_evaluation(statement->condition, body_block, false_block);
4694         mature_immBlock(body_block);
4695         mature_immBlock(header_block);
4696         mature_immBlock(false_block);
4697
4698         set_cur_block(false_block);
4699 }
4700
4701 static void for_statement_to_firm(for_statement_t *statement)
4702 {
4703         ir_node *jmp = NULL;
4704
4705         /* create declarations */
4706         entity_t *entity = statement->scope.entities;
4707         for ( ; entity != NULL; entity = entity->base.next) {
4708                 if (!is_declaration(entity))
4709                         continue;
4710
4711                 create_local_declaration(entity);
4712         }
4713
4714         if (get_cur_block() != NULL) {
4715                 entity = statement->scope.entities;
4716                 for ( ; entity != NULL; entity = entity->base.next) {
4717                         if (!is_declaration(entity))
4718                                 continue;
4719
4720                         initialize_local_declaration(entity);
4721                 }
4722
4723                 if (statement->initialisation != NULL) {
4724                         expression_to_firm(statement->initialisation);
4725                 }
4726
4727                 jmp = new_Jmp();
4728         }
4729
4730
4731         /* create the step block */
4732         ir_node *const step_block = new_immBlock();
4733         set_cur_block(step_block);
4734         if (statement->step != NULL) {
4735                 expression_to_firm(statement->step);
4736         }
4737         ir_node *const step_jmp = new_Jmp();
4738
4739         /* create the header block */
4740         ir_node *const header_block = new_immBlock();
4741         set_cur_block(header_block);
4742         if (jmp != NULL) {
4743                 add_immBlock_pred(header_block, jmp);
4744         }
4745         add_immBlock_pred(header_block, step_jmp);
4746
4747         /* the false block */
4748         ir_node *const false_block = new_immBlock();
4749
4750         /* the loop body */
4751         ir_node *body_block;
4752         if (statement->body != NULL) {
4753                 ir_node *const old_continue_label = continue_label;
4754                 ir_node *const old_break_label    = break_label;
4755                 continue_label = step_block;
4756                 break_label    = false_block;
4757
4758                 body_block = new_immBlock();
4759                 set_cur_block(body_block);
4760                 statement_to_firm(statement->body);
4761
4762                 assert(continue_label == step_block);
4763                 assert(break_label    == false_block);
4764                 continue_label = old_continue_label;
4765                 break_label    = old_break_label;
4766
4767                 if (get_cur_block() != NULL) {
4768                         jmp = new_Jmp();
4769                         add_immBlock_pred(step_block, jmp);
4770                 }
4771         } else {
4772                 body_block = step_block;
4773         }
4774
4775         /* create the condition */
4776         set_cur_block(header_block);
4777         if (statement->condition != NULL) {
4778                 create_condition_evaluation(statement->condition, body_block,
4779                                             false_block);
4780         } else {
4781                 keep_alive(header_block);
4782                 keep_all_memory(header_block);
4783                 jmp = new_Jmp();
4784                 add_immBlock_pred(body_block, jmp);
4785         }
4786
4787         mature_immBlock(body_block);
4788         mature_immBlock(false_block);
4789         mature_immBlock(step_block);
4790         mature_immBlock(header_block);
4791         mature_immBlock(false_block);
4792
4793         set_cur_block(false_block);
4794 }
4795
4796 static void create_jump_statement(const statement_t *statement,
4797                                   ir_node *target_block)
4798 {
4799         if (get_cur_block() == NULL)
4800                 return;
4801
4802         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4803         ir_node  *jump = new_d_Jmp(dbgi);
4804         add_immBlock_pred(target_block, jump);
4805
4806         set_cur_block(NULL);
4807 }
4808
4809 static ir_node *get_break_label(void)
4810 {
4811         if (break_label == NULL) {
4812                 break_label = new_immBlock();
4813         }
4814         return break_label;
4815 }
4816
4817 static void switch_statement_to_firm(switch_statement_t *statement)
4818 {
4819         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4820
4821         ir_node *expression  = expression_to_firm(statement->expression);
4822         ir_node *cond        = new_d_Cond(dbgi, expression);
4823
4824         set_cur_block(NULL);
4825
4826         ir_node *const old_switch_cond       = current_switch_cond;
4827         ir_node *const old_break_label       = break_label;
4828         const bool     old_saw_default_label = saw_default_label;
4829         saw_default_label                    = false;
4830         current_switch_cond                  = cond;
4831         break_label                          = NULL;
4832         switch_statement_t *const old_switch = current_switch;
4833         current_switch                       = statement;
4834
4835         /* determine a free number for the default label */
4836         unsigned long num_cases = 0;
4837         long def_nr = 0;
4838         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4839                 if (l->expression == NULL) {
4840                         /* default case */
4841                         continue;
4842                 }
4843                 if (l->last_case >= l->first_case)
4844                         num_cases += l->last_case - l->first_case + 1;
4845                 if (l->last_case > def_nr)
4846                         def_nr = l->last_case;
4847         }
4848
4849         if (def_nr == INT_MAX) {
4850                 /* Bad: an overflow will occurr, we cannot be sure that the
4851                  * maximum + 1 is a free number. Scan the values a second
4852                  * time to find a free number.
4853                  */
4854                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4855
4856                 memset(bits, 0, (num_cases + 7) >> 3);
4857                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4858                         if (l->expression == NULL) {
4859                                 /* default case */
4860                                 continue;
4861                         }
4862                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4863                         if (start < num_cases && l->last_case >= 0) {
4864                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4865                                         (unsigned long)l->last_case : num_cases - 1;
4866                                 for (unsigned long cns = start; cns <= end; ++cns) {
4867                                         bits[cns >> 3] |= (1 << (cns & 7));
4868                                 }
4869                         }
4870                 }
4871                 /* We look at the first num_cases constants:
4872                  * Either they are densed, so we took the last (num_cases)
4873                  * one, or they are non densed, so we will find one free
4874                  * there...
4875                  */
4876                 unsigned long i;
4877                 for (i = 0; i < num_cases; ++i)
4878                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4879                                 break;
4880
4881                 free(bits);
4882                 def_nr = i;
4883         } else {
4884                 ++def_nr;
4885         }
4886         statement->default_proj_nr = def_nr;
4887
4888         if (statement->body != NULL) {
4889                 statement_to_firm(statement->body);
4890         }
4891
4892         if (get_cur_block() != NULL) {
4893                 ir_node *jmp = new_Jmp();
4894                 add_immBlock_pred(get_break_label(), jmp);
4895         }
4896
4897         if (!saw_default_label) {
4898                 set_cur_block(get_nodes_block(cond));
4899                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4900                                                         statement->default_proj_nr);
4901                 add_immBlock_pred(get_break_label(), proj);
4902         }
4903
4904         if (break_label != NULL) {
4905                 mature_immBlock(break_label);
4906         }
4907         set_cur_block(break_label);
4908
4909         assert(current_switch_cond == cond);
4910         current_switch      = old_switch;
4911         current_switch_cond = old_switch_cond;
4912         break_label         = old_break_label;
4913         saw_default_label   = old_saw_default_label;
4914 }
4915
4916 static void case_label_to_firm(const case_label_statement_t *statement)
4917 {
4918         if (statement->is_empty_range)
4919                 return;
4920
4921         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4922
4923         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4924
4925         ir_node *proj;
4926         ir_node *block     = new_immBlock();
4927
4928         set_cur_block(get_nodes_block(current_switch_cond));
4929         if (statement->expression != NULL) {
4930                 long pn     = statement->first_case;
4931                 long end_pn = statement->last_case;
4932                 assert(pn <= end_pn);
4933                 /* create jumps for all cases in the given range */
4934                 do {
4935                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4936                         add_immBlock_pred(block, proj);
4937                 } while(pn++ < end_pn);
4938         } else {
4939                 saw_default_label = true;
4940                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4941                                          current_switch->default_proj_nr);
4942
4943                 add_immBlock_pred(block, proj);
4944         }
4945
4946         if (fallthrough != NULL) {
4947                 add_immBlock_pred(block, fallthrough);
4948         }
4949         mature_immBlock(block);
4950         set_cur_block(block);
4951
4952         if (statement->statement != NULL) {
4953                 statement_to_firm(statement->statement);
4954         }
4955 }
4956
4957 static void label_to_firm(const label_statement_t *statement)
4958 {
4959         ir_node *block = get_label_block(statement->label);
4960
4961         if (get_cur_block() != NULL) {
4962                 ir_node *jmp = new_Jmp();
4963                 add_immBlock_pred(block, jmp);
4964         }
4965
4966         set_cur_block(block);
4967         keep_alive(block);
4968         keep_all_memory(block);
4969
4970         if (statement->statement != NULL) {
4971                 statement_to_firm(statement->statement);
4972         }
4973 }
4974
4975 static void goto_to_firm(const goto_statement_t *statement)
4976 {
4977         if (get_cur_block() == NULL)
4978                 return;
4979
4980         if (statement->expression) {
4981                 ir_node  *irn  = expression_to_firm(statement->expression);
4982                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4983                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4984
4985                 set_irn_link(ijmp, ijmp_list);
4986                 ijmp_list = ijmp;
4987         } else {
4988                 ir_node *block = get_label_block(statement->label);
4989                 ir_node *jmp   = new_Jmp();
4990                 add_immBlock_pred(block, jmp);
4991         }
4992         set_cur_block(NULL);
4993 }
4994
4995 static void asm_statement_to_firm(const asm_statement_t *statement)
4996 {
4997         bool needs_memory = false;
4998
4999         if (statement->is_volatile) {
5000                 needs_memory = true;
5001         }
5002
5003         size_t         n_clobbers = 0;
5004         asm_clobber_t *clobber    = statement->clobbers;
5005         for ( ; clobber != NULL; clobber = clobber->next) {
5006                 const char *clobber_str = clobber->clobber.begin;
5007
5008                 if (!be_is_valid_clobber(clobber_str)) {
5009                         errorf(&statement->base.source_position,
5010                                    "invalid clobber '%s' specified", clobber->clobber);
5011                         continue;
5012                 }
5013
5014                 if (strcmp(clobber_str, "memory") == 0) {
5015                         needs_memory = true;
5016                         continue;
5017                 }
5018
5019                 ident *id = new_id_from_str(clobber_str);
5020                 obstack_ptr_grow(&asm_obst, id);
5021                 ++n_clobbers;
5022         }
5023         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5024         ident **clobbers = NULL;
5025         if (n_clobbers > 0) {
5026                 clobbers = obstack_finish(&asm_obst);
5027         }
5028
5029         size_t n_inputs  = 0;
5030         asm_argument_t *argument = statement->inputs;
5031         for ( ; argument != NULL; argument = argument->next)
5032                 n_inputs++;
5033         size_t n_outputs = 0;
5034         argument = statement->outputs;
5035         for ( ; argument != NULL; argument = argument->next)
5036                 n_outputs++;
5037
5038         unsigned next_pos = 0;
5039
5040         ir_node *ins[n_inputs + n_outputs + 1];
5041         size_t   in_size = 0;
5042
5043         ir_asm_constraint tmp_in_constraints[n_outputs];
5044
5045         const expression_t *out_exprs[n_outputs];
5046         ir_node            *out_addrs[n_outputs];
5047         size_t              out_size = 0;
5048
5049         argument = statement->outputs;
5050         for ( ; argument != NULL; argument = argument->next) {
5051                 const char *constraints = argument->constraints.begin;
5052                 asm_constraint_flags_t asm_flags
5053                         = be_parse_asm_constraints(constraints);
5054
5055                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5056                         warningf(&statement->base.source_position,
5057                                "some constraints in '%s' are not supported", constraints);
5058                 }
5059                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5060                         errorf(&statement->base.source_position,
5061                                "some constraints in '%s' are invalid", constraints);
5062                         continue;
5063                 }
5064                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5065                         errorf(&statement->base.source_position,
5066                                "no write flag specified for output constraints '%s'",
5067                                constraints);
5068                         continue;
5069                 }
5070
5071                 unsigned pos = next_pos++;
5072                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5073                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5074                         expression_t *expr = argument->expression;
5075                         ir_node      *addr = expression_to_addr(expr);
5076                         /* in+output, construct an artifical same_as constraint on the
5077                          * input */
5078                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5079                                 char     buf[64];
5080                                 ir_node *value = get_value_from_lvalue(expr, addr);
5081
5082                                 snprintf(buf, sizeof(buf), "%u", pos);
5083
5084                                 ir_asm_constraint constraint;
5085                                 constraint.pos              = pos;
5086                                 constraint.constraint       = new_id_from_str(buf);
5087                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5088                                 tmp_in_constraints[in_size] = constraint;
5089                                 ins[in_size] = value;
5090
5091                                 ++in_size;
5092                         }
5093
5094                         out_exprs[out_size] = expr;
5095                         out_addrs[out_size] = addr;
5096                         ++out_size;
5097                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5098                         /* pure memory ops need no input (but we have to make sure we
5099                          * attach to the memory) */
5100                         assert(! (asm_flags &
5101                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5102                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5103                         needs_memory = true;
5104
5105                         /* we need to attach the address to the inputs */
5106                         expression_t *expr = argument->expression;
5107
5108                         ir_asm_constraint constraint;
5109                         constraint.pos              = pos;
5110                         constraint.constraint       = new_id_from_str(constraints);
5111                         constraint.mode             = NULL;
5112                         tmp_in_constraints[in_size] = constraint;
5113
5114                         ins[in_size]          = expression_to_addr(expr);
5115                         ++in_size;
5116                         continue;
5117                 } else {
5118                         errorf(&statement->base.source_position,
5119                                "only modifiers but no place set in constraints '%s'",
5120                                constraints);
5121                         continue;
5122                 }
5123
5124                 ir_asm_constraint constraint;
5125                 constraint.pos        = pos;
5126                 constraint.constraint = new_id_from_str(constraints);
5127                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5128
5129                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5130         }
5131         assert(obstack_object_size(&asm_obst)
5132                         == out_size * sizeof(ir_asm_constraint));
5133         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5134
5135
5136         obstack_grow(&asm_obst, tmp_in_constraints,
5137                      in_size * sizeof(tmp_in_constraints[0]));
5138         /* find and count input and output arguments */
5139         argument = statement->inputs;
5140         for ( ; argument != NULL; argument = argument->next) {
5141                 const char *constraints = argument->constraints.begin;
5142                 asm_constraint_flags_t asm_flags
5143                         = be_parse_asm_constraints(constraints);
5144
5145                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5146                         errorf(&statement->base.source_position,
5147                                "some constraints in '%s' are not supported", constraints);
5148                         continue;
5149                 }
5150                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5151                         errorf(&statement->base.source_position,
5152                                "some constraints in '%s' are invalid", constraints);
5153                         continue;
5154                 }
5155                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5156                         errorf(&statement->base.source_position,
5157                                "write flag specified for input constraints '%s'",
5158                                constraints);
5159                         continue;
5160                 }
5161
5162                 ir_node *input;
5163                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5164                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5165                         /* we can treat this as "normal" input */
5166                         input = expression_to_firm(argument->expression);
5167                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5168                         /* pure memory ops need no input (but we have to make sure we
5169                          * attach to the memory) */
5170                         assert(! (asm_flags &
5171                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5172                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5173                         needs_memory = true;
5174                         input = expression_to_addr(argument->expression);
5175                 } else {
5176                         errorf(&statement->base.source_position,
5177                                "only modifiers but no place set in constraints '%s'",
5178                                constraints);
5179                         continue;
5180                 }
5181
5182                 ir_asm_constraint constraint;
5183                 constraint.pos        = next_pos++;
5184                 constraint.constraint = new_id_from_str(constraints);
5185                 constraint.mode       = get_irn_mode(input);
5186
5187                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5188                 ins[in_size++] = input;
5189         }
5190
5191         if (needs_memory) {
5192                 ir_asm_constraint constraint;
5193                 constraint.pos        = next_pos++;
5194                 constraint.constraint = new_id_from_str("");
5195                 constraint.mode       = mode_M;
5196
5197                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5198                 ins[in_size++] = get_store();
5199         }
5200
5201         assert(obstack_object_size(&asm_obst)
5202                         == in_size * sizeof(ir_asm_constraint));
5203         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5204
5205         /* create asm node */
5206         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5207
5208         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5209
5210         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5211                                   out_size, output_constraints,
5212                                   n_clobbers, clobbers, asm_text);
5213
5214         if (statement->is_volatile) {
5215                 set_irn_pinned(node, op_pin_state_pinned);
5216         } else {
5217                 set_irn_pinned(node, op_pin_state_floats);
5218         }
5219
5220         /* create output projs & connect them */
5221         if (needs_memory) {
5222                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5223                 set_store(projm);
5224         }
5225
5226         size_t i;
5227         for (i = 0; i < out_size; ++i) {
5228                 const expression_t *out_expr = out_exprs[i];
5229                 long                pn       = i;
5230                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5231                 ir_node            *proj     = new_Proj(node, mode, pn);
5232                 ir_node            *addr     = out_addrs[i];
5233
5234                 set_value_for_expression_addr(out_expr, proj, addr);
5235         }
5236 }
5237
5238 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5239 {
5240         statement_to_firm(statement->try_statement);
5241         warningf(&statement->base.source_position, "structured exception handling ignored");
5242 }
5243
5244 static void     leave_statement_to_firm(leave_statement_t *statement)
5245 {
5246         errorf(&statement->base.source_position, "__leave not supported yet");
5247 }
5248
5249 /**
5250  * Transform a statement.
5251  */
5252 static void statement_to_firm(statement_t *statement)
5253 {
5254 #ifndef NDEBUG
5255         assert(!statement->base.transformed);
5256         statement->base.transformed = true;
5257 #endif
5258
5259         switch (statement->kind) {
5260         case STATEMENT_INVALID:
5261                 panic("invalid statement found");
5262         case STATEMENT_EMPTY:
5263                 /* nothing */
5264                 return;
5265         case STATEMENT_COMPOUND:
5266                 compound_statement_to_firm(&statement->compound);
5267                 return;
5268         case STATEMENT_RETURN:
5269                 return_statement_to_firm(&statement->returns);
5270                 return;
5271         case STATEMENT_EXPRESSION:
5272                 expression_statement_to_firm(&statement->expression);
5273                 return;
5274         case STATEMENT_IF:
5275                 if_statement_to_firm(&statement->ifs);
5276                 return;
5277         case STATEMENT_WHILE:
5278                 while_statement_to_firm(&statement->whiles);
5279                 return;
5280         case STATEMENT_DO_WHILE:
5281                 do_while_statement_to_firm(&statement->do_while);
5282                 return;
5283         case STATEMENT_DECLARATION:
5284                 declaration_statement_to_firm(&statement->declaration);
5285                 return;
5286         case STATEMENT_BREAK:
5287                 create_jump_statement(statement, get_break_label());
5288                 return;
5289         case STATEMENT_CONTINUE:
5290                 create_jump_statement(statement, continue_label);
5291                 return;
5292         case STATEMENT_SWITCH:
5293                 switch_statement_to_firm(&statement->switchs);
5294                 return;
5295         case STATEMENT_CASE_LABEL:
5296                 case_label_to_firm(&statement->case_label);
5297                 return;
5298         case STATEMENT_FOR:
5299                 for_statement_to_firm(&statement->fors);
5300                 return;
5301         case STATEMENT_LABEL:
5302                 label_to_firm(&statement->label);
5303                 return;
5304         case STATEMENT_GOTO:
5305                 goto_to_firm(&statement->gotos);
5306                 return;
5307         case STATEMENT_ASM:
5308                 asm_statement_to_firm(&statement->asms);
5309                 return;
5310         case STATEMENT_MS_TRY:
5311                 ms_try_statement_to_firm(&statement->ms_try);
5312                 return;
5313         case STATEMENT_LEAVE:
5314                 leave_statement_to_firm(&statement->leave);
5315                 return;
5316         }
5317         panic("statement not implemented");
5318 }
5319
5320 static int count_local_variables(const entity_t *entity,
5321                                  const entity_t *const last)
5322 {
5323         int count = 0;
5324         entity_t const *const end = last != NULL ? last->base.next : NULL;
5325         for (; entity != end; entity = entity->base.next) {
5326                 type_t *type;
5327                 bool    address_taken;
5328
5329                 if (entity->kind == ENTITY_VARIABLE) {
5330                         type          = skip_typeref(entity->declaration.type);
5331                         address_taken = entity->variable.address_taken;
5332                 } else if (entity->kind == ENTITY_PARAMETER) {
5333                         type          = skip_typeref(entity->declaration.type);
5334                         address_taken = entity->parameter.address_taken;
5335                 } else {
5336                         continue;
5337                 }
5338
5339                 if (!address_taken && is_type_scalar(type))
5340                         ++count;
5341         }
5342         return count;
5343 }
5344
5345 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5346 {
5347         int *const count = env;
5348
5349         switch (stmt->kind) {
5350         case STATEMENT_DECLARATION: {
5351                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5352                 *count += count_local_variables(decl_stmt->declarations_begin,
5353                                 decl_stmt->declarations_end);
5354                 break;
5355         }
5356
5357         case STATEMENT_FOR:
5358                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5359                 break;
5360
5361         default:
5362                 break;
5363         }
5364 }
5365
5366 static int get_function_n_local_vars(entity_t *entity)
5367 {
5368         int count = 0;
5369
5370         /* count parameters */
5371         count += count_local_variables(entity->function.parameters.entities, NULL);
5372
5373         /* count local variables declared in body */
5374         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5375                         &count);
5376         return count;
5377 }
5378
5379 static void initialize_function_parameters(entity_t *entity)
5380 {
5381         assert(entity->kind == ENTITY_FUNCTION);
5382         ir_graph *irg             = current_ir_graph;
5383         ir_node  *args            = get_irg_args(irg);
5384         ir_node  *start_block     = get_irg_start_block(irg);
5385         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5386
5387         int       n         = 0;
5388         entity_t *parameter = entity->function.parameters.entities;
5389         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5390                 if (parameter->kind != ENTITY_PARAMETER)
5391                         continue;
5392
5393                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5394                 type_t *type = skip_typeref(parameter->declaration.type);
5395
5396                 bool needs_entity = parameter->parameter.address_taken;
5397                 assert(!is_type_array(type));
5398                 if (is_type_compound(type)) {
5399                         needs_entity = true;
5400                 }
5401
5402                 if (needs_entity) {
5403                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5404                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5405                         set_entity_ident(entity, id);
5406
5407                         parameter->declaration.kind
5408                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5409                         parameter->parameter.v.entity = entity;
5410                         continue;
5411                 }
5412
5413                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5414                 ir_mode *param_mode   = get_type_mode(param_irtype);
5415
5416                 long     pn    = n;
5417                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5418
5419                 ir_mode *mode = get_ir_mode_storage(type);
5420                 value = create_conv(NULL, value, mode);
5421                 value = do_strict_conv(NULL, value);
5422
5423                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5424                 parameter->parameter.v.value_number = next_value_number_function;
5425                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5426                                         parameter);
5427                 ++next_value_number_function;
5428
5429                 set_value(parameter->parameter.v.value_number, value);
5430         }
5431 }
5432
5433 /**
5434  * Handle additional decl modifiers for IR-graphs
5435  *
5436  * @param irg            the IR-graph
5437  * @param dec_modifiers  additional modifiers
5438  */
5439 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5440 {
5441         if (decl_modifiers & DM_RETURNS_TWICE) {
5442                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5443                 set_irg_additional_property(irg, mtp_property_returns_twice);
5444         }
5445         if (decl_modifiers & DM_NORETURN) {
5446                 /* TRUE if the declaration includes the Microsoft
5447                    __declspec(noreturn) specifier. */
5448                 set_irg_additional_property(irg, mtp_property_noreturn);
5449         }
5450         if (decl_modifiers & DM_NOTHROW) {
5451                 /* TRUE if the declaration includes the Microsoft
5452                    __declspec(nothrow) specifier. */
5453                 set_irg_additional_property(irg, mtp_property_nothrow);
5454         }
5455         if (decl_modifiers & DM_NAKED) {
5456                 /* TRUE if the declaration includes the Microsoft
5457                    __declspec(naked) specifier. */
5458                 set_irg_additional_property(irg, mtp_property_naked);
5459         }
5460         if (decl_modifiers & DM_FORCEINLINE) {
5461                 /* TRUE if the declaration includes the
5462                    Microsoft __forceinline specifier. */
5463                 set_irg_inline_property(irg, irg_inline_forced);
5464         }
5465         if (decl_modifiers & DM_NOINLINE) {
5466                 /* TRUE if the declaration includes the Microsoft
5467                    __declspec(noinline) specifier. */
5468                 set_irg_inline_property(irg, irg_inline_forbidden);
5469         }
5470 }
5471
5472 static void add_function_pointer(ir_type *segment, ir_entity *method,
5473                                  const char *unique_template)
5474 {
5475         ir_type   *method_type  = get_entity_type(method);
5476         ident     *id           = id_unique(unique_template);
5477         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5478
5479         ident     *ide          = id_unique(unique_template);
5480         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5481         ir_graph  *irg          = get_const_code_irg();
5482         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5483                                                            method, NULL);
5484
5485         set_entity_compiler_generated(ptr, 1);
5486         set_entity_variability(ptr, variability_constant);
5487         set_atomic_ent_value(ptr, val);
5488 }
5489
5490 /**
5491  * Generate possible IJmp branches to a given label block.
5492  */
5493 static void gen_ijmp_branches(ir_node *block)
5494 {
5495         ir_node *ijmp;
5496         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5497                 add_immBlock_pred(block, ijmp);
5498         }
5499 }
5500
5501 /**
5502  * Create code for a function.
5503  */
5504 static void create_function(entity_t *entity)
5505 {
5506         assert(entity->kind == ENTITY_FUNCTION);
5507         ir_entity *function_entity = get_function_entity(entity);
5508
5509         if (entity->function.statement == NULL)
5510                 return;
5511
5512         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5513                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5514                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5515         }
5516         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5517                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5518                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5519         }
5520
5521         current_function_entity = entity;
5522         current_function_name   = NULL;
5523         current_funcsig         = NULL;
5524
5525         assert(all_labels == NULL);
5526         all_labels = NEW_ARR_F(label_t *, 0);
5527         ijmp_list  = NULL;
5528
5529         int       n_local_vars = get_function_n_local_vars(entity);
5530         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5531
5532         ir_graph *old_current_function = current_function;
5533         current_function = irg;
5534
5535         set_irg_fp_model(irg, firm_opt.fp_model);
5536         tarval_enable_fp_ops(1);
5537         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5538
5539         ir_node *first_block = get_cur_block();
5540
5541         /* set inline flags */
5542         if (entity->function.is_inline)
5543                 set_irg_inline_property(irg, irg_inline_recomended);
5544         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5545
5546         next_value_number_function = 0;
5547         initialize_function_parameters(entity);
5548
5549         statement_to_firm(entity->function.statement);
5550
5551         ir_node *end_block = get_irg_end_block(irg);
5552
5553         /* do we have a return statement yet? */
5554         if (get_cur_block() != NULL) {
5555                 type_t *type = skip_typeref(entity->declaration.type);
5556                 assert(is_type_function(type));
5557                 const function_type_t *func_type   = &type->function;
5558                 const type_t          *return_type
5559                         = skip_typeref(func_type->return_type);
5560
5561                 ir_node *ret;
5562                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5563                         ret = new_Return(get_store(), 0, NULL);
5564                 } else {
5565                         ir_mode *mode;
5566                         if (is_type_scalar(return_type)) {
5567                                 mode = get_ir_mode_storage(func_type->return_type);
5568                         } else {
5569                                 mode = mode_P_data;
5570                         }
5571
5572                         ir_node *in[1];
5573                         /* §5.1.2.2.3 main implicitly returns 0 */
5574                         if (is_main(entity)) {
5575                                 in[0] = new_Const(get_mode_null(mode));
5576                         } else {
5577                                 in[0] = new_Unknown(mode);
5578                         }
5579                         ret = new_Return(get_store(), 1, in);
5580                 }
5581                 add_immBlock_pred(end_block, ret);
5582         }
5583
5584         bool has_computed_gotos = false;
5585         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5586                 label_t *label = all_labels[i];
5587                 if (label->address_taken) {
5588                         gen_ijmp_branches(label->block);
5589                         has_computed_gotos = true;
5590                 }
5591                 mature_immBlock(label->block);
5592         }
5593         if (has_computed_gotos) {
5594                 /* if we have computed goto's in the function, we cannot inline it */
5595                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5596                         warningf(&entity->base.source_position,
5597                                  "function '%Y' can never be inlined because it contains a computed goto",
5598                                  entity->base.symbol);
5599                 }
5600                 set_irg_inline_property(irg, irg_inline_forbidden);
5601         }
5602
5603         DEL_ARR_F(all_labels);
5604         all_labels = NULL;
5605
5606         mature_immBlock(first_block);
5607         mature_immBlock(end_block);
5608
5609         irg_finalize_cons(irg);
5610
5611         /* finalize the frame type */
5612         ir_type *frame_type = get_irg_frame_type(irg);
5613         int      n          = get_compound_n_members(frame_type);
5614         int      align_all  = 4;
5615         int      offset     = 0;
5616         for (int i = 0; i < n; ++i) {
5617                 ir_entity *entity      = get_compound_member(frame_type, i);
5618                 ir_type   *entity_type = get_entity_type(entity);
5619
5620                 int align = get_type_alignment_bytes(entity_type);
5621                 if (align > align_all)
5622                         align_all = align;
5623                 int misalign = 0;
5624                 if (align > 0) {
5625                         misalign  = offset % align;
5626                         if (misalign > 0) {
5627                                 offset += align - misalign;
5628                         }
5629                 }
5630
5631                 set_entity_offset(entity, offset);
5632                 offset += get_type_size_bytes(entity_type);
5633         }
5634         set_type_size_bytes(frame_type, offset);
5635         set_type_alignment_bytes(frame_type, align_all);
5636
5637         irg_vrfy(irg);
5638         current_function = old_current_function;
5639
5640         /* create inner functions */
5641         entity_t *inner;
5642         for (inner = next_inner_function(); inner != NULL;
5643              inner = next_inner_function()) {
5644                 create_function(inner);
5645         }
5646 }
5647
5648 static void scope_to_firm(scope_t *scope)
5649 {
5650         /* first pass: create declarations */
5651         entity_t *entity = scope->entities;
5652         for ( ; entity != NULL; entity = entity->base.next) {
5653                 if (entity->base.symbol == NULL)
5654                         continue;
5655
5656                 if (entity->kind == ENTITY_FUNCTION) {
5657                         if (entity->function.btk != bk_none) {
5658                                 /* builtins have no representation */
5659                                 continue;
5660                         }
5661                         get_function_entity(entity);
5662                 } else if (entity->kind == ENTITY_VARIABLE) {
5663                         create_global_variable(entity);
5664                 }
5665         }
5666
5667         /* second pass: create code/initializers */
5668         entity = scope->entities;
5669         for ( ; entity != NULL; entity = entity->base.next) {
5670                 if (entity->base.symbol == NULL)
5671                         continue;
5672
5673                 if (entity->kind == ENTITY_FUNCTION) {
5674                         if (entity->function.btk != bk_none) {
5675                                 /* builtins have no representation */
5676                                 continue;
5677                         }
5678                         create_function(entity);
5679                 } else if (entity->kind == ENTITY_VARIABLE) {
5680                         assert(entity->declaration.kind
5681                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5682                         current_ir_graph = get_const_code_irg();
5683                         create_variable_initializer(entity);
5684                 }
5685         }
5686 }
5687
5688 void init_ast2firm(void)
5689 {
5690         obstack_init(&asm_obst);
5691         init_atomic_modes();
5692
5693         /* OS option must be set to the backend */
5694         switch (firm_opt.os_support) {
5695         case OS_SUPPORT_MINGW:
5696                 create_ld_ident = create_name_win32;
5697                 break;
5698         case OS_SUPPORT_LINUX:
5699                 create_ld_ident = create_name_linux_elf;
5700                 break;
5701         case OS_SUPPORT_MACHO:
5702                 create_ld_ident = create_name_macho;
5703                 break;
5704         default:
5705                 panic("unexpected OS support mode");
5706         }
5707
5708         /* create idents for all known runtime functions */
5709         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5710                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5711         }
5712
5713         entitymap_init(&entitymap);
5714 }
5715
5716 static void init_ir_types(void)
5717 {
5718         static int ir_types_initialized = 0;
5719         if (ir_types_initialized)
5720                 return;
5721         ir_types_initialized = 1;
5722
5723         ir_type_int        = get_ir_type(type_int);
5724         ir_type_const_char = get_ir_type(type_const_char);
5725         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5726         ir_type_void       = get_ir_type(type_void);
5727
5728         const backend_params *be_params = be_get_backend_param();
5729         mode_float_arithmetic = be_params->mode_float_arithmetic;
5730 }
5731
5732 void exit_ast2firm(void)
5733 {
5734         entitymap_destroy(&entitymap);
5735         obstack_free(&asm_obst, NULL);
5736 }
5737
5738 static void global_asm_to_firm(statement_t *s)
5739 {
5740         for (; s != NULL; s = s->base.next) {
5741                 assert(s->kind == STATEMENT_ASM);
5742
5743                 char const *const text = s->asms.asm_text.begin;
5744                 size_t            size = s->asms.asm_text.size;
5745
5746                 /* skip the last \0 */
5747                 if (text[size - 1] == '\0')
5748                         --size;
5749
5750                 ident *const id = new_id_from_chars(text, size);
5751                 add_irp_asm(id);
5752         }
5753 }
5754
5755 void translation_unit_to_firm(translation_unit_t *unit)
5756 {
5757         /* just to be sure */
5758         continue_label           = NULL;
5759         break_label              = NULL;
5760         current_switch_cond      = NULL;
5761         current_translation_unit = unit;
5762
5763         init_ir_types();
5764         inner_functions = NEW_ARR_F(entity_t *, 0);
5765
5766         scope_to_firm(&unit->scope);
5767         global_asm_to_firm(unit->global_asm);
5768
5769         DEL_ARR_F(inner_functions);
5770         inner_functions  = NULL;
5771
5772         current_ir_graph         = NULL;
5773         current_translation_unit = NULL;
5774 }