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