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