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
  26 #include <libfirm/firm.h>
  27 #include <libfirm/adt/obst.h>
  28
  29 #include "ast2firm.h"
  30
  31 #include "adt/error.h"
  32 #include "adt/array.h"
  33 #include "symbol_t.h"
  34 #include "token_t.h"
  35 #include "type_t.h"
  36 #include "ast_t.h"
  37 #include "parser.h"
  38 #include "diagnostic.h"
  39 #include "lang_features.h"
  40 #include "types.h"
  41 #include "warning.h"
  42 #include "entitymap_t.h"
  43 #include "driver/firm_opt.h"
  44 #include "driver/firm_cmdline.h"
  45
  46 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  47
  48 /* some idents needed for name mangling */
  49 static ident *id_underscore;
  50 static ident *id_imp;
  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 static type_t *type_const_char;
  58
  59 static int       next_value_number_function;
  60 static ir_node  *continue_label;
  61 static ir_node  *break_label;
  62 static ir_node  *current_switch_cond;
  63 static bool      saw_default_label;
  64 static ir_node **imature_blocks;
  65
  66 static const declaration_t *current_function_decl;
  67 static ir_node             *current_function_name;
  68 static ir_node             *current_funcsig;
  69
  70 static entitymap_t  entitymap;
  71
  72 static struct obstack asm_obst;
  73
  74 typedef enum declaration_kind_t {
  75         DECLARATION_KIND_UNKNOWN,
  76         DECLARATION_KIND_FUNCTION,
  77         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  78         DECLARATION_KIND_GLOBAL_VARIABLE,
  79         DECLARATION_KIND_LOCAL_VARIABLE,
  80         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  81         DECLARATION_KIND_COMPOUND_MEMBER,
  82         DECLARATION_KIND_LABEL_BLOCK,
  83         DECLARATION_KIND_ENUM_ENTRY,
  84         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  85         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  86         DECLARATION_KIND_TYPE
  87 } declaration_kind_t;
  88
  89 static ir_type *get_ir_type(type_t *type);
  90 static ir_type *get_ir_type_incomplete(type_t *type);
  91 static int count_decls_in_stmts(const statement_t *stmt);
  92
  93 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  94 {
  95         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  96
  97         warningf(&declaration->source_position,
  98                  "variable '%#T' might be used uninitialized",
  99                  declaration->type, declaration->symbol);
 100         return new_r_Unknown(irg, mode);
 101 }
 102
 103 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 104 {
 105         const source_position_t *pos = (const source_position_t*) dbg;
 106         if(pos == NULL)
 107                 return 0;
 108         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 109                                    pos->linenr);
 110 }
 111
 112 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 113 {
 114         const source_position_t *pos = (const source_position_t*) dbg;
 115         if(pos == NULL)
 116                 return NULL;
 117         if(line != NULL)
 118                 *line = pos->linenr;
 119         return pos->input_name;
 120 }
 121
 122 static dbg_info *get_dbg_info(const source_position_t *pos)
 123 {
 124         return (dbg_info*) pos;
 125 }
 126
 127 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 128
 129 static ir_mode *mode_int, *mode_uint;
 130
 131 static ir_node *_expression_to_firm(const expression_t *expression);
 132 static ir_node *expression_to_firm(const expression_t *expression);
 133 static inline ir_mode *get_ir_mode(type_t *type);
 134 static void create_local_declaration(declaration_t *declaration);
 135
 136 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 137 {
 138         unsigned flags = get_atomic_type_flags(kind);
 139         unsigned size  = get_atomic_type_size(kind);
 140         if( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 141                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 142                 char            name[64];
 143                 ir_mode_sort    sort;
 144                 unsigned        bit_size     = size * 8;
 145                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 146                 ir_mode_arithmetic arithmetic;
 147                 unsigned        modulo_shift;
 148
 149                 if(flags & ATOMIC_TYPE_FLAG_INTEGER) {
 150                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 151                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 152                         sort         = irms_int_number;
 153                         arithmetic   = irma_twos_complement;
 154                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 155                 } else {
 156                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 157                         snprintf(name, sizeof(name), "f%d", bit_size);
 158                         sort         = irms_float_number;
 159                         arithmetic   = irma_ieee754;
 160                         modulo_shift = 0;
 161                 }
 162                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 163                                    modulo_shift);
 164         }
 165
 166         return NULL;
 167 }
 168
 169 /**
 170  * Initialises the atomic modes depending on the machine size.
 171  */
 172 static void init_atomic_modes(void)
 173 {
 174         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 175                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 176         }
 177         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 178         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 179
 180         /* there's no real void type in firm */
 181         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 182
 183         /* initialize pointer modes */
 184         char            name[64];
 185         ir_mode_sort    sort         = irms_reference;
 186         unsigned        bit_size     = machine_size;
 187         bool            is_signed    = 0;
 188         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 189         unsigned        modulo_shift
 190                 = bit_size < machine_size ? machine_size : bit_size;
 191
 192         snprintf(name, sizeof(name), "p%d", machine_size);
 193         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 194                                         modulo_shift);
 195
 196         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 197         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 198
 199         /* Hmm, pointers should be machine size */
 200         set_modeP_data(ptr_mode);
 201         set_modeP_code(ptr_mode);
 202 }
 203
 204 static unsigned get_compound_type_size(compound_type_t *type)
 205 {
 206         ir_type *irtype = get_ir_type((type_t*) type);
 207         return get_type_size_bytes(irtype);
 208 }
 209
 210 static unsigned get_array_type_size(array_type_t *type)
 211 {
 212         assert(!type->is_vla);
 213         ir_type *irtype = get_ir_type((type_t*) type);
 214         return get_type_size_bytes(irtype);
 215 }
 216
 217
 218 static unsigned get_type_size_const(type_t *type)
 219 {
 220         type = skip_typeref(type);
 221
 222         switch(type->kind) {
 223         case TYPE_ERROR:
 224                 panic("error type occurred");
 225         case TYPE_ATOMIC:
 226                 return get_atomic_type_size(type->atomic.akind);
 227         case TYPE_COMPLEX:
 228                 return 2 * get_atomic_type_size(type->complex.akind);
 229         case TYPE_IMAGINARY:
 230                 return get_atomic_type_size(type->imaginary.akind);
 231         case TYPE_ENUM:
 232                 return get_mode_size_bytes(mode_int);
 233         case TYPE_COMPOUND_UNION:
 234         case TYPE_COMPOUND_STRUCT:
 235                 return get_compound_type_size(&type->compound);
 236         case TYPE_FUNCTION:
 237                 /* just a pointer to the function */
 238                 return get_mode_size_bytes(mode_P_code);
 239         case TYPE_POINTER:
 240                 return get_mode_size_bytes(mode_P_data);
 241         case TYPE_ARRAY:
 242                 return get_array_type_size(&type->array);
 243         case TYPE_BUILTIN:
 244                 return get_type_size_const(type->builtin.real_type);
 245         case TYPE_BITFIELD:
 246                 panic("type size of bitfield request");
 247         case TYPE_TYPEDEF:
 248         case TYPE_TYPEOF:
 249         case TYPE_INVALID:
 250                 break;
 251         }
 252         panic("Trying to determine size of invalid type");
 253 }
 254
 255 static ir_node *get_type_size(type_t *type)
 256 {
 257         type = skip_typeref(type);
 258
 259         if(is_type_array(type) && type->array.is_vla) {
 260                 ir_node *size_node = type->array.size_node;
 261                 if(size_node == NULL) {
 262                         size_node = expression_to_firm(type->array.size_expression);
 263                         assert(!is_Const(size_node));
 264                         type->array.size_node = size_node;
 265                 }
 266
 267                 ir_node *elem_size = get_type_size(type->array.element_type);
 268                 ir_mode *mode      = get_irn_mode(size_node);
 269                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 270                 return real_size;
 271         }
 272
 273         ir_mode *mode = get_ir_mode(type_size_t);
 274         symconst_symbol sym;
 275         sym.type_p = get_ir_type(type);
 276         return new_SymConst(mode, sym, symconst_type_size);
 277 }
 278
 279 static unsigned count_parameters(const function_type_t *function_type)
 280 {
 281         unsigned count = 0;
 282
 283         function_parameter_t *parameter = function_type->parameters;
 284         for ( ; parameter != NULL; parameter = parameter->next) {
 285                 ++count;
 286         }
 287
 288         return count;
 289 }
 290
 291 /**
 292  * Creates a Firm type for an atomic type
 293  */
 294 static ir_type *create_atomic_type(const atomic_type_t *type)
 295 {
 296         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 297         atomic_type_kind_t  kind      = type->akind;
 298         ir_mode            *mode      = _atomic_modes[kind];
 299         ident              *id        = get_mode_ident(mode);
 300         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 301
 302         set_type_alignment_bytes(irtype, type->base.alignment);
 303
 304         return irtype;
 305 }
 306
 307 /**
 308  * Creates a Firm type for a complex type
 309  */
 310 static ir_type *create_complex_type(const complex_type_t *type)
 311 {
 312         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 313         atomic_type_kind_t  kind      = type->akind;
 314         ir_mode            *mode      = _atomic_modes[kind];
 315         ident              *id        = get_mode_ident(mode);
 316
 317         (void) id;
 318         (void) dbgi;
 319
 320         /* FIXME: finish the array */
 321         return NULL;
 322 }
 323
 324 /**
 325  * Creates a Firm type for an imaginary type
 326  */
 327 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 328 {
 329         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 330         atomic_type_kind_t  kind      = type->akind;
 331         ir_mode            *mode      = _atomic_modes[kind];
 332         ident              *id        = get_mode_ident(mode);
 333         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 334
 335         set_type_alignment_bytes(irtype, type->base.alignment);
 336
 337         return irtype;
 338 }
 339
 340 static ir_type *create_method_type(const function_type_t *function_type)
 341 {
 342         type_t  *return_type  = function_type->return_type;
 343
 344         ident   *id           = id_unique("functiontype.%u");
 345         int      n_parameters = count_parameters(function_type);
 346         int      n_results    = return_type == type_void ? 0 : 1;
 347         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 348         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 349
 350         if (return_type != type_void) {
 351                 ir_type *restype = get_ir_type(return_type);
 352                 set_method_res_type(irtype, 0, restype);
 353         }
 354
 355         function_parameter_t *parameter = function_type->parameters;
 356         int                   n         = 0;
 357         for ( ; parameter != NULL; parameter = parameter->next) {
 358                 ir_type *p_irtype = get_ir_type(parameter->type);
 359                 set_method_param_type(irtype, n, p_irtype);
 360                 ++n;
 361         }
 362
 363         if (function_type->variadic || function_type->unspecified_parameters) {
 364                 set_method_variadicity(irtype, variadicity_variadic);
 365         }
 366
 367         return irtype;
 368 }
 369
 370 static ir_type *create_pointer_type(pointer_type_t *type)
 371 {
 372         type_t   *points_to    = type->points_to;
 373         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 374         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 375         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 376                                                     ir_points_to, mode_P_data, dbgi);
 377
 378         return ir_type;
 379 }
 380
 381 static ir_type *create_array_type(array_type_t *type)
 382 {
 383         type_t  *element_type    = type->element_type;
 384         ir_type *ir_element_type = get_ir_type(element_type);
 385
 386         ident    *id      = id_unique("array.%u");
 387         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 388         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 389
 390         const int align = get_type_alignment_bytes(ir_element_type);
 391         set_type_alignment_bytes(ir_type, align);
 392
 393         if(type->size_constant) {
 394                 int n_elements = type->size;
 395
 396                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 397
 398                 size_t elemsize = get_type_size_bytes(ir_element_type);
 399                 if(elemsize % align > 0) {
 400                         elemsize += align - (elemsize % align);
 401                 }
 402                 set_type_size_bytes(ir_type, n_elements * elemsize);
 403         } else {
 404                 set_array_lower_bound_int(ir_type, 0, 0);
 405         }
 406         set_type_state(ir_type, layout_fixed);
 407
 408         return ir_type;
 409 }
 410
 411 /**
 412  * Return the signed integer type of size bits.
 413  *
 414  * @param size   the size
 415  */
 416 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 417                                                  unsigned size)
 418 {
 419         static ir_mode *s_modes[64 + 1] = {NULL, };
 420         ir_type *res;
 421         ir_mode *mode;
 422
 423         if (size <= 0 || size > 64)
 424                 return NULL;
 425
 426         mode = s_modes[size];
 427         if (mode == NULL) {
 428                 char name[32];
 429
 430                 snprintf(name, sizeof(name), "bf_I%u", size);
 431                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 432                                    size <= 32 ? 32 : size );
 433                 s_modes[size] = mode;
 434         }
 435
 436         char name[32];
 437         snprintf(name, sizeof(name), "I%u", size);
 438         ident *id = new_id_from_str(name);
 439         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 440         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 441         set_primitive_base_type(res, base_tp);
 442
 443         return res;
 444 }
 445
 446 /**
 447  * Return the unsigned integer type of size bits.
 448  *
 449  * @param size   the size
 450  */
 451 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 452                                                    unsigned size)
 453 {
 454         static ir_mode *u_modes[64 + 1] = {NULL, };
 455         ir_type *res;
 456         ir_mode *mode;
 457
 458         if (size <= 0 || size > 64)
 459                 return NULL;
 460
 461         mode = u_modes[size];
 462         if (mode == NULL) {
 463                 char name[32];
 464
 465                 snprintf(name, sizeof(name), "bf_U%u", size);
 466                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 467                                    size <= 32 ? 32 : size );
 468                 u_modes[size] = mode;
 469         }
 470
 471         char name[32];
 472
 473         snprintf(name, sizeof(name), "U%u", size);
 474         ident *id = new_id_from_str(name);
 475         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 476         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 477         set_primitive_base_type(res, base_tp);
 478
 479         return res;
 480 }
 481
 482 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 483 {
 484         type_t *base = skip_typeref(type->base_type);
 485         assert(base->kind == TYPE_ATOMIC);
 486         ir_type *irbase = get_ir_type(base);
 487
 488         unsigned size = fold_constant(type->size);
 489
 490         assert(!is_type_float(base));
 491         if(is_type_signed(base)) {
 492                 return get_signed_int_type_for_bit_size(irbase, size);
 493         } else {
 494                 return get_unsigned_int_type_for_bit_size(irbase, size);
 495         }
 496 }
 497
 498 #define INVALID_TYPE ((ir_type_ptr)-1)
 499
 500 enum {
 501         COMPOUND_IS_STRUCT = false,
 502         COMPOUND_IS_UNION  = true
 503 };
 504
 505 /**
 506  * Construct firm type from ast struct type.
 507  *
 508  * As anonymous inner structs get flattened to a single firm type, we might get
 509  * irtype, outer_offset and out_align passed (they represent the position of
 510  * the anonymous inner struct inside the resulting firm struct)
 511  */
 512 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 513                                      size_t *outer_offset, size_t *outer_align,
 514                                      bool incomplete, bool is_union)
 515 {
 516         declaration_t      *declaration = type->declaration;
 517         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 518
 519         if(kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 520                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 521                                 && incomplete))
 522                 return declaration->v.irtype;
 523
 524         size_t align_all  = 1;
 525         size_t offset     = 0;
 526         size_t bit_offset = 0;
 527         size_t size       = 0;
 528
 529         if(irtype == NULL) {
 530                 symbol_t *symbol = declaration->symbol;
 531                 ident    *id;
 532                 if(symbol != NULL) {
 533                         id = new_id_from_str(symbol->string);
 534                 } else {
 535                         if (is_union) {
 536                                 id = id_unique("__anonymous_union.%u");
 537                         } else {
 538                                 id = id_unique("__anonymous_struct.%u");
 539                         }
 540                 }
 541                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 542
 543                 if (is_union) {
 544                         irtype = new_d_type_union(id, dbgi);
 545                 } else {
 546                         irtype = new_d_type_struct(id, dbgi);
 547                 }
 548
 549                 declaration->declaration_kind
 550                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 551                 declaration->v.irtype         = irtype;
 552                 //type->base.firm_type          = irtype;
 553         } else {
 554                 offset    = *outer_offset;
 555                 align_all = *outer_align;
 556         }
 557
 558         if(incomplete)
 559                 return irtype;
 560
 561         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 562
 563         declaration_t *entry = declaration->scope.declarations;
 564         for( ; entry != NULL; entry = entry->next) {
 565                 if(entry->namespc != NAMESPACE_NORMAL)
 566                         continue;
 567
 568                 size_t prev_offset = offset;
 569
 570                 symbol_t *symbol     = entry->symbol;
 571                 type_t   *entry_type = skip_typeref(entry->type);
 572                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 573
 574                 ident    *ident;
 575                 if(symbol != NULL) {
 576                         ident = new_id_from_str(symbol->string);
 577                 } else {
 578                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 579                                 create_compound_type(&entry_type->compound, irtype, &offset,
 580                                                      &align_all, false, COMPOUND_IS_STRUCT);
 581                                 goto finished_member;
 582                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 583                                 create_compound_type(&entry_type->compound, irtype, &offset,
 584                                                      &align_all, false, COMPOUND_IS_UNION);
 585                                 goto finished_member;
 586                         } else {
 587                                 assert(entry_type->kind == TYPE_BITFIELD);
 588                         }
 589                         ident = id_unique("anon.%u");
 590                 }
 591
 592                 ir_type *base_irtype;
 593                 if(entry_type->kind == TYPE_BITFIELD) {
 594                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 595                 } else {
 596                         base_irtype = get_ir_type(entry_type);
 597                 }
 598
 599                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 600                 size_t misalign        = offset % entry_alignment;
 601
 602                 ir_type   *entry_irtype = get_ir_type(entry_type);
 603                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 604
 605                 size_t base;
 606                 size_t bits_remainder;
 607                 if(entry_type->kind == TYPE_BITFIELD) {
 608                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 609                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 610
 611                         if(size_bits > rest_size_bits) {
 612                                 /* start a new bucket */
 613                                 offset     += entry_alignment - misalign;
 614                                 bit_offset  = 0;
 615
 616                                 base           = offset;
 617                                 bits_remainder = 0;
 618                         } else {
 619                                 /* put into current bucket */
 620                                 base           = offset - misalign;
 621                                 bits_remainder = misalign * 8 + bit_offset;
 622                         }
 623
 624                         offset     += size_bits / 8;
 625                         bit_offset  = bit_offset + (size_bits % 8);
 626                 } else {
 627                         size_t entry_size = get_type_size_bytes(base_irtype);
 628                         if(misalign > 0 || bit_offset > 0)
 629                                 offset += entry_alignment - misalign;
 630
 631                         base           = offset;
 632                         bits_remainder = 0;
 633                         offset        += entry_size;
 634                         bit_offset     = 0;
 635                 }
 636
 637                 if(entry_alignment > align_all) {
 638                         if(entry_alignment % align_all != 0) {
 639                                 panic("uneven alignments not supported yet");
 640                         }
 641                         align_all = entry_alignment;
 642                 }
 643
 644                 set_entity_offset(entity, base);
 645                 set_entity_offset_bits_remainder(entity,
 646                                                  (unsigned char) bits_remainder);
 647                 //add_struct_member(irtype, entity);
 648                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 649                 assert(entry->v.entity == NULL);
 650                 entry->v.entity         = entity;
 651
 652 finished_member:
 653                 if (is_union) {
 654                         size_t entry_size = offset - prev_offset;
 655                         if (entry_size > size) {
 656                                 size = entry_size;
 657                         }
 658                         offset     = 0;
 659                         bit_offset = 0;
 660                 }
 661         }
 662
 663         if (!is_union) {
 664                 size = offset;
 665         }
 666
 667         size_t misalign = offset % align_all;
 668         if(misalign > 0 || bit_offset > 0) {
 669                 size += align_all - misalign;
 670         }
 671
 672         if(outer_offset != NULL) {
 673                 if (!is_union) {
 674                         *outer_offset = offset;
 675                 } else {
 676                         *outer_offset += size;
 677                 }
 678
 679                 if (align_all > *outer_align) {
 680                         if(align_all % *outer_align != 0) {
 681                                 panic("uneven alignments not supported yet");
 682                         }
 683                         *outer_align = align_all;
 684                 }
 685         } else {
 686                 set_type_alignment_bytes(irtype, align_all);
 687                 set_type_size_bytes(irtype, size);
 688                 set_type_state(irtype, layout_fixed);
 689         }
 690
 691         return irtype;
 692 }
 693
 694 static ir_type *create_enum_type(enum_type_t *const type)
 695 {
 696         type->base.firm_type = ir_type_int;
 697
 698         ir_mode *const mode    = mode_int;
 699         tarval  *const one     = get_mode_one(mode);
 700         tarval  *      tv_next = get_tarval_null(mode);
 701
 702         declaration_t *declaration = type->declaration->next;
 703         for (; declaration != NULL; declaration = declaration->next) {
 704                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 705                         break;
 706
 707                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 708
 709                 expression_t *const init = declaration->init.enum_value;
 710                 if (init != NULL) {
 711                         ir_node *const cnst = expression_to_firm(init);
 712                         if (!is_Const(cnst)) {
 713                                 panic("couldn't fold constant");
 714                         }
 715                         tv_next = get_Const_tarval(cnst);
 716                 }
 717                 declaration->v.enum_val = tv_next;
 718                 tv_next = tarval_add(tv_next, one);
 719         }
 720
 721         return ir_type_int;
 722 }
 723
 724 static ir_type *get_ir_type_incomplete(type_t *type)
 725 {
 726         assert(type != NULL);
 727         type = skip_typeref(type);
 728
 729         if (type->base.firm_type != NULL) {
 730                 assert(type->base.firm_type != INVALID_TYPE);
 731                 return type->base.firm_type;
 732         }
 733
 734         switch (type->kind) {
 735         case TYPE_COMPOUND_STRUCT:
 736                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 737                                             true, COMPOUND_IS_STRUCT);
 738                 break;
 739         case TYPE_COMPOUND_UNION:
 740                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 741                                             true, COMPOUND_IS_UNION);
 742         default:
 743                 return get_ir_type(type);
 744         }
 745 }
 746
 747 static ir_type *get_ir_type(type_t *type)
 748 {
 749         assert(type != NULL);
 750
 751         type = skip_typeref(type);
 752
 753         if (type->base.firm_type != NULL) {
 754                 assert(type->base.firm_type != INVALID_TYPE);
 755                 return type->base.firm_type;
 756         }
 757
 758         ir_type *firm_type = NULL;
 759         switch (type->kind) {
 760         case TYPE_ERROR:
 761                 panic("error type occurred");
 762         case TYPE_ATOMIC:
 763                 firm_type = create_atomic_type(&type->atomic);
 764                 break;
 765         case TYPE_COMPLEX:
 766                 firm_type = create_complex_type(&type->complex);
 767                 break;
 768         case TYPE_IMAGINARY:
 769                 firm_type = create_imaginary_type(&type->imaginary);
 770                 break;
 771         case TYPE_FUNCTION:
 772                 firm_type = create_method_type(&type->function);
 773                 break;
 774         case TYPE_POINTER:
 775                 firm_type = create_pointer_type(&type->pointer);
 776                 break;
 777         case TYPE_ARRAY:
 778                 firm_type = create_array_type(&type->array);
 779                 break;
 780         case TYPE_COMPOUND_STRUCT:
 781                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 782                                                  false, COMPOUND_IS_STRUCT);
 783                 break;
 784         case TYPE_COMPOUND_UNION:
 785                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 786                                                  false, COMPOUND_IS_UNION);
 787                 break;
 788         case TYPE_ENUM:
 789                 firm_type = create_enum_type(&type->enumt);
 790                 break;
 791         case TYPE_BUILTIN:
 792                 firm_type = get_ir_type(type->builtin.real_type);
 793                 break;
 794         case TYPE_BITFIELD:
 795                 firm_type = create_bitfield_type(&type->bitfield);
 796                 break;
 797
 798         case TYPE_TYPEOF:
 799         case TYPE_TYPEDEF:
 800         case TYPE_INVALID:
 801                 break;
 802         }
 803         if(firm_type == NULL)
 804                 panic("unknown type found");
 805
 806         type->base.firm_type = firm_type;
 807         return firm_type;
 808 }
 809
 810 static inline ir_mode *get_ir_mode(type_t *type)
 811 {
 812         ir_type *irtype = get_ir_type(type);
 813
 814         /* firm doesn't report a mode for arrays somehow... */
 815         if(is_Array_type(irtype)) {
 816                 return mode_P_data;
 817         }
 818
 819         ir_mode *mode = get_type_mode(irtype);
 820         assert(mode != NULL);
 821         return mode;
 822 }
 823
 824 /** Names of the runtime functions. */
 825 static const struct {
 826         int        id;           /**< the rts id */
 827         int        n_res;        /**< number of return values */
 828         const char *name;        /**< the name of the rts function */
 829         int        n_params;     /**< number of parameters */
 830         unsigned   flags;        /**< language flags */
 831 } rts_data[] = {
 832         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 833         { rts_abort,      0, "abort",        0, _C89 },
 834         { rts_alloca,     1, "alloca",       1, _ALL },
 835         { rts_abs,        1, "abs",          1, _C89 },
 836         { rts_labs,       1, "labs",         1, _C89 },
 837         { rts_llabs,      1, "llabs",        1, _C99 },
 838         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 839
 840         { rts_fabs,       1, "fabs",         1, _C89 },
 841         { rts_sqrt,       1, "sqrt",         1, _C89 },
 842         { rts_cbrt,       1, "cbrt",         1, _C99 },
 843         { rts_exp,        1, "exp",          1, _C89 },
 844         { rts_exp2,       1, "exp2",         1, _C89 },
 845         { rts_exp10,      1, "exp10",        1, _GNUC },
 846         { rts_log,        1, "log",          1, _C89 },
 847         { rts_log2,       1, "log2",         1, _C89 },
 848         { rts_log10,      1, "log10",        1, _C89 },
 849         { rts_pow,        1, "pow",          2, _C89 },
 850         { rts_sin,        1, "sin",          1, _C89 },
 851         { rts_cos,        1, "cos",          1, _C89 },
 852         { rts_tan,        1, "tan",          1, _C89 },
 853         { rts_asin,       1, "asin",         1, _C89 },
 854         { rts_acos,       1, "acos",         1, _C89 },
 855         { rts_atan,       1, "atan",         1, _C89 },
 856         { rts_sinh,       1, "sinh",         1, _C89 },
 857         { rts_cosh,       1, "cosh",         1, _C89 },
 858         { rts_tanh,       1, "tanh",         1, _C89 },
 859
 860         { rts_fabsf,      1, "fabsf",        1, _C99 },
 861         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 862         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 863         { rts_expf,       1, "expf",         1, _C99 },
 864         { rts_exp2f,      1, "exp2f",        1, _C99 },
 865         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 866         { rts_logf,       1, "logf",         1, _C99 },
 867         { rts_log2f,      1, "log2f",        1, _C99 },
 868         { rts_log10f,     1, "log10f",       1, _C99 },
 869         { rts_powf,       1, "powf",         2, _C99 },
 870         { rts_sinf,       1, "sinf",         1, _C99 },
 871         { rts_cosf,       1, "cosf",         1, _C99 },
 872         { rts_tanf,       1, "tanf",         1, _C99 },
 873         { rts_asinf,      1, "asinf",        1, _C99 },
 874         { rts_acosf,      1, "acosf",        1, _C99 },
 875         { rts_atanf,      1, "atanf",        1, _C99 },
 876         { rts_sinhf,      1, "sinhf",        1, _C99 },
 877         { rts_coshf,      1, "coshf",        1, _C99 },
 878         { rts_tanhf,      1, "tanhf",        1, _C99 },
 879
 880         { rts_fabsl,      1, "fabsl",        1, _C99 },
 881         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 882         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 883         { rts_expl,       1, "expl",         1, _C99 },
 884         { rts_exp2l,      1, "exp2l",        1, _C99 },
 885         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 886         { rts_logl,       1, "logl",         1, _C99 },
 887         { rts_log2l,      1, "log2l",        1, _C99 },
 888         { rts_log10l,     1, "log10l",       1, _C99 },
 889         { rts_powl,       1, "powl",         2, _C99 },
 890         { rts_sinl,       1, "sinl",         1, _C99 },
 891         { rts_cosl,       1, "cosl",         1, _C99 },
 892         { rts_tanl,       1, "tanl",         1, _C99 },
 893         { rts_asinl,      1, "asinl",        1, _C99 },
 894         { rts_acosl,      1, "acosl",        1, _C99 },
 895         { rts_atanl,      1, "atanl",        1, _C99 },
 896         { rts_sinhl,      1, "sinhl",        1, _C99 },
 897         { rts_coshl,      1, "coshl",        1, _C99 },
 898         { rts_tanhl,      1, "tanhl",        1, _C99 },
 899
 900         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 901         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 902         { rts_strcmp,     1, "strcmp",       2, _C89 },
 903         { rts_strncmp,    1, "strncmp",      3, _C89 }
 904 };
 905
 906 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 907
 908 /**
 909  * Mangles an entity linker (ld) name for win32 usage.
 910  *
 911  * @param ent          the entity to be mangled
 912  * @param declaration  the declaration
 913  */
 914 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 915 {
 916         ident *id;
 917
 918         if (is_Method_type(get_entity_type(ent)))
 919                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 920         else {
 921                 /* always add an underscore in win32 */
 922                 id = mangle(id_underscore, get_entity_ident(ent));
 923         }
 924
 925         decl_modifiers_t decl_modifiers = declaration->decl_modifiers;
 926         if (decl_modifiers & DM_DLLIMPORT) {
 927                 /* add prefix for imported symbols */
 928                 id = mangle(id_imp, id);
 929         }
 930         return id;
 931 }
 932
 933 /**
 934  * Mangles an entity linker (ld) name for Linux ELF usage.
 935  *
 936  * @param ent          the entity to be mangled
 937  * @param declaration  the declaration
 938  */
 939 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 940                                         declaration_t *declaration)
 941 {
 942         (void) declaration;
 943         return get_entity_ident(entity);
 944 }
 945
 946 /**
 947  * Mangles an entity linker (ld) name for Mach-O usage.
 948  *
 949  * @param ent          the entity to be mangled
 950  * @param declaration  the declaration
 951  */
 952 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
 953 {
 954         (void) declaration;
 955         ident *id = mangle(id_underscore, get_entity_ident(ent));
 956         return id;
 957 }
 958
 959 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
 960                                        declaration_t *declaration);
 961 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
 962
 963 /**
 964  * Creates an entity representing a function.
 965  *
 966  * @param declaration  the function declaration
 967  */
 968 static ir_entity *get_function_entity(declaration_t *declaration)
 969 {
 970         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 971                 return declaration->v.entity;
 972         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 973
 974         symbol_t *symbol = declaration->symbol;
 975         ident    *id     = new_id_from_str(symbol->string);
 976
 977         ir_type  *global_type    = get_glob_type();
 978         ir_type  *ir_type_method = get_ir_type(declaration->type);
 979         assert(is_Method_type(ir_type_method));
 980
 981         /* already an entity defined? */
 982         ir_entity *entity = entitymap_get(&entitymap, symbol);
 983         if (entity != NULL)
 984                 goto entity_created;
 985
 986         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
 987         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
 988         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
 989         if(declaration->storage_class == STORAGE_CLASS_STATIC &&
 990                 declaration->init.statement == NULL) {
 991                 /* this entity was declared, but never defined */
 992                 set_entity_peculiarity(entity, peculiarity_description);
 993         }
 994         if(declaration->storage_class == STORAGE_CLASS_STATIC
 995                         || declaration->is_inline) {
 996                 set_entity_visibility(entity, visibility_local);
 997         } else if(declaration->init.statement != NULL) {
 998                 set_entity_visibility(entity, visibility_external_visible);
 999         } else {
1000                 set_entity_visibility(entity, visibility_external_allocated);
1001         }
1002         set_entity_allocation(entity, allocation_static);
1003
1004         /* We should check for file scope here, but as long as we compile C only
1005            this is not needed. */
1006         if (! firm_opt.freestanding) {
1007                 /* check for a known runtime function */
1008                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1009                         if (id != rts_idents[i])
1010                                 continue;
1011
1012                         /* ignore those rts functions not necessary needed for current mode */
1013                         if ((c_mode & rts_data[i].flags) == 0)
1014                                 continue;
1015                         assert(rts_entities[rts_data[i].id] == NULL);
1016                         rts_entities[rts_data[i].id] = entity;
1017                 }
1018         }
1019
1020         entitymap_insert(&entitymap, symbol, entity);
1021
1022 entity_created:
1023         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1024         declaration->v.entity         = entity;
1025
1026         return entity;
1027 }
1028
1029 /**
1030  * Creates a Const node representing a constant.
1031  */
1032 static ir_node *const_to_firm(const const_expression_t *cnst)
1033 {
1034         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1035         ir_mode  *mode = get_ir_mode(cnst->base.type);
1036
1037         char    buf[128];
1038         tarval *tv;
1039         size_t  len;
1040         if(mode_is_float(mode)) {
1041                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1042         } else {
1043                 if(mode_is_signed(mode)) {
1044                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1045                 } else {
1046                         len = snprintf(buf, sizeof(buf), "%llu",
1047                                        (unsigned long long) cnst->v.int_value);
1048                 }
1049                 tv = new_tarval_from_str(buf, len, mode);
1050         }
1051
1052         return new_d_Const(dbgi, mode, tv);
1053 }
1054
1055 /**
1056  * Creates a Const node representing a character constant.
1057  */
1058 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1059 {
1060         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1061         ir_mode  *mode = get_ir_mode(cnst->base.type);
1062
1063         long long int v = 0;
1064         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1065                 if (char_is_signed) {
1066                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1067                 } else {
1068                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1069                 }
1070         }
1071         char    buf[128];
1072         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1073         tarval *tv = new_tarval_from_str(buf, len, mode);
1074
1075         return new_d_Const(dbgi, mode, tv);
1076 }
1077
1078 /**
1079  * Creates a Const node representing a wide character constant.
1080  */
1081 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1082 {
1083         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1084         ir_mode  *mode = get_ir_mode(cnst->base.type);
1085
1086         long long int v = cnst->v.wide_character.begin[0];
1087
1088         char    buf[128];
1089         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1090         tarval *tv = new_tarval_from_str(buf, len, mode);
1091
1092         return new_d_Const(dbgi, mode, tv);
1093 }
1094
1095 /**
1096  * Creates a SymConst for a given entity.
1097  *
1098  * @param dbgi    debug info
1099  * @param mode    the (reference) mode for the SymConst
1100  * @param entity  the entity
1101  */
1102 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1103                               ir_entity *entity)
1104 {
1105         assert(entity != NULL);
1106         union symconst_symbol sym;
1107         sym.entity_p = entity;
1108         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1109 }
1110
1111 /**
1112  * Creates a SymConst node representing a string constant.
1113  *
1114  * @param src_pos    the source position of the string constant
1115  * @param id_prefix  a prefix for the name of the generated string constant
1116  * @param value      the value of the string constant
1117  */
1118 static ir_node *string_to_firm(const source_position_t *const src_pos,
1119                                const char *const id_prefix,
1120                                const string_t *const value)
1121 {
1122         ir_type  *const global_type = get_glob_type();
1123         dbg_info *const dbgi        = get_dbg_info(src_pos);
1124         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1125                                                        ir_type_const_char, dbgi);
1126
1127         ident     *const id     = id_unique(id_prefix);
1128         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1129         set_entity_ld_ident(entity, id);
1130         set_entity_variability(entity, variability_constant);
1131         set_entity_allocation(entity, allocation_static);
1132
1133         ir_type *const elem_type = ir_type_const_char;
1134         ir_mode *const mode      = get_type_mode(elem_type);
1135
1136         const char* const string = value->begin;
1137         const size_t      slen   = value->size;
1138
1139         set_array_lower_bound_int(type, 0, 0);
1140         set_array_upper_bound_int(type, 0, slen);
1141         set_type_size_bytes(type, slen);
1142         set_type_state(type, layout_fixed);
1143
1144         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1145         for(size_t i = 0; i < slen; ++i) {
1146                 tvs[i] = new_tarval_from_long(string[i], mode);
1147         }
1148
1149         set_array_entity_values(entity, tvs, slen);
1150         free(tvs);
1151
1152         return create_symconst(dbgi, mode_P_data, entity);
1153 }
1154
1155 /**
1156  * Creates a SymConst node representing a string literal.
1157  *
1158  * @param literal   the string literal
1159  */
1160 static ir_node *string_literal_to_firm(
1161                 const string_literal_expression_t* literal)
1162 {
1163         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1164                               &literal->value);
1165 }
1166
1167 /**
1168  * Creates a SymConst node representing a wide string literal.
1169  *
1170  * @param literal   the wide string literal
1171  */
1172 static ir_node *wide_string_literal_to_firm(
1173         const wide_string_literal_expression_t* const literal)
1174 {
1175         ir_type *const global_type = get_glob_type();
1176         ir_type *const elem_type   = ir_type_wchar_t;
1177         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1178         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1179                                                     elem_type, dbgi);
1180
1181         ident     *const id     = id_unique("Lstr.%u");
1182         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1183         set_entity_ld_ident(entity, id);
1184         set_entity_variability(entity, variability_constant);
1185         set_entity_allocation(entity, allocation_static);
1186
1187         ir_mode *const mode      = get_type_mode(elem_type);
1188
1189         const wchar_rep_t *const string = literal->value.begin;
1190         const size_t             slen   = literal->value.size;
1191
1192         set_array_lower_bound_int(type, 0, 0);
1193         set_array_upper_bound_int(type, 0, slen);
1194         set_type_size_bytes(type, slen);
1195         set_type_state(type, layout_fixed);
1196
1197         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1198         for(size_t i = 0; i < slen; ++i) {
1199                 tvs[i] = new_tarval_from_long(string[i], mode);
1200         }
1201
1202         set_array_entity_values(entity, tvs, slen);
1203         free(tvs);
1204
1205         return create_symconst(dbgi, mode_P_data, entity);
1206 }
1207
1208 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1209                                       ir_node *const addr)
1210 {
1211         ir_type *irtype = get_ir_type(type);
1212         if (is_compound_type(irtype)
1213                         || is_Method_type(irtype)
1214                         || is_Array_type(irtype)) {
1215                 return addr;
1216         }
1217
1218         ir_mode *const mode     = get_type_mode(irtype);
1219         ir_node *const memory   = get_store();
1220         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1221         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1222         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1223
1224         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1225                 set_Load_volatility(load, volatility_is_volatile);
1226         }
1227
1228         set_store(load_mem);
1229         return load_res;
1230 }
1231
1232 /**
1233  * Creates a strict Conv if neccessary.
1234  */
1235 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1236 {
1237         ir_mode *mode = get_irn_mode(node);
1238
1239         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1240                 return node;
1241         if (!mode_is_float(mode))
1242                 return node;
1243
1244         /* check if there is already a Conv */
1245         if (is_Conv(node)) {
1246                 /* convert it into a strict Conv */
1247                 set_Conv_strict(node, 1);
1248                 return node;
1249         }
1250
1251         /* otherwise create a new one */
1252         return new_d_strictConv(dbgi, node, mode);
1253 }
1254
1255 static ir_node *get_global_var_address(dbg_info *const dbgi,
1256                                        const declaration_t *const decl)
1257 {
1258         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1259
1260         ir_entity *const entity = decl->v.entity;
1261         switch ((storage_class_tag_t)decl->storage_class) {
1262                 case STORAGE_CLASS_THREAD:
1263                 case STORAGE_CLASS_THREAD_EXTERN:
1264                 case STORAGE_CLASS_THREAD_STATIC: {
1265                         ir_node *const no_mem = new_NoMem();
1266                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1267                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1268                 }
1269
1270                 default:
1271                         return create_symconst(dbgi, mode_P_data, entity);
1272         }
1273 }
1274
1275 /**
1276  * Returns the correct base address depending on whether it is a parameter or a
1277  * normal local variable.
1278  */
1279 static ir_node *get_local_frame(ir_entity *const ent)
1280 {
1281         ir_graph      *const irg   = current_ir_graph;
1282         const ir_type *const owner = get_entity_owner(ent);
1283         if (owner == get_irg_frame_type(irg)) {
1284                 return get_irg_frame(irg);
1285         } else {
1286                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1287                 return get_irg_value_param_base(irg);
1288         }
1289 }
1290
1291 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1292 {
1293         ir_mode *value_mode = get_irn_mode(value);
1294
1295         if (value_mode == dest_mode || is_Bad(value))
1296                 return value;
1297
1298         if(dest_mode == mode_b) {
1299                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1300                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1301                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1302                 return proj;
1303         }
1304
1305         return new_d_Conv(dbgi, value, dest_mode);
1306 }
1307
1308 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1309 {
1310         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1311         declaration_t *declaration = ref->declaration;
1312         type_t        *type        = skip_typeref(declaration->type);
1313
1314         /* make sure the type is constructed */
1315         (void) get_ir_type(type);
1316
1317         switch((declaration_kind_t) declaration->declaration_kind) {
1318         case DECLARATION_KIND_TYPE:
1319         case DECLARATION_KIND_UNKNOWN:
1320                 break;
1321
1322         case DECLARATION_KIND_ENUM_ENTRY: {
1323                 ir_mode *const mode = get_ir_mode(type);
1324                 return new_Const(mode, declaration->v.enum_val);
1325         }
1326
1327         case DECLARATION_KIND_LOCAL_VARIABLE: {
1328                 ir_mode *const mode = get_ir_mode(type);
1329                 return get_value(declaration->v.value_number, mode);
1330         }
1331         case DECLARATION_KIND_FUNCTION: {
1332                 ir_mode *const mode = get_ir_mode(type);
1333                 return create_symconst(dbgi, mode, declaration->v.entity);
1334         }
1335         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1336                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1337                 return deref_address(dbgi, declaration->type, addr);
1338         }
1339
1340         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1341                 ir_entity *entity = declaration->v.entity;
1342                 ir_node   *frame  = get_local_frame(entity);
1343                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1344                 return deref_address(dbgi, declaration->type, sel);
1345         }
1346
1347         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1348                 return declaration->v.vla_base;
1349
1350         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1351         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1352         case DECLARATION_KIND_COMPOUND_MEMBER:
1353         case DECLARATION_KIND_LABEL_BLOCK:
1354                 panic("not implemented reference type");
1355         }
1356
1357         panic("reference to declaration with unknown type found");
1358 }
1359
1360 static ir_node *reference_addr(const reference_expression_t *ref)
1361 {
1362         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1363         declaration_t *declaration = ref->declaration;
1364
1365         switch((declaration_kind_t) declaration->declaration_kind) {
1366         case DECLARATION_KIND_TYPE:
1367         case DECLARATION_KIND_UNKNOWN:
1368                 break;
1369         case DECLARATION_KIND_LOCAL_VARIABLE:
1370                 /* you can store to a local variable (so we don't panic but return NULL
1371                  * as an indicator for no real address) */
1372                 return NULL;
1373         case DECLARATION_KIND_FUNCTION: {
1374                 type_t *const  type = skip_typeref(ref->base.type);
1375                 ir_mode *const mode = get_ir_mode(type);
1376                 return create_symconst(dbgi, mode, declaration->v.entity);
1377         }
1378         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1379                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1380                 return addr;
1381         }
1382         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1383                 ir_entity *entity = declaration->v.entity;
1384                 ir_node   *frame  = get_local_frame(entity);
1385                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1386
1387                 return sel;
1388         }
1389
1390         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1391                 return declaration->v.vla_base;
1392
1393         case DECLARATION_KIND_ENUM_ENTRY:
1394                 panic("trying to reference enum entry");
1395
1396         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1397         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1398         case DECLARATION_KIND_COMPOUND_MEMBER:
1399         case DECLARATION_KIND_LABEL_BLOCK:
1400                 panic("not implemented reference type");
1401         }
1402
1403         panic("reference to declaration with unknown type found");
1404 }
1405
1406 /**
1407  * Transform calls to builtin functions.
1408  */
1409 static ir_node *process_builtin_call(const call_expression_t *call)
1410 {
1411         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1412
1413         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1414         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1415
1416         type_t *type = skip_typeref(builtin->base.type);
1417         assert(is_type_pointer(type));
1418
1419         type_t   *function_type = skip_typeref(type->pointer.points_to);
1420         symbol_t *symbol        = builtin->symbol;
1421
1422         switch(symbol->ID) {
1423         case T___builtin_alloca: {
1424                 if(call->arguments == NULL || call->arguments->next != NULL) {
1425                         panic("invalid number of parameters on __builtin_alloca");
1426                 }
1427                 expression_t *argument = call->arguments->expression;
1428                 ir_node      *size     = expression_to_firm(argument);
1429
1430                 ir_node *store  = get_store();
1431                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1432                                               stack_alloc);
1433                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1434                 set_store(proj_m);
1435                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1436
1437                 return res;
1438         }
1439         case T___builtin_huge_val: {
1440                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1441                 tarval  *tv   = get_mode_infinite(mode);
1442                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1443                 return   res;
1444         }
1445         case T___builtin_nan:
1446         case T___builtin_nanf:
1447         case T___builtin_nand: {
1448                 /* Ignore string for now... */
1449                 assert(is_type_function(function_type));
1450                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1451                 tarval  *tv   = get_mode_NAN(mode);
1452                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1453                 return res;
1454         }
1455         case T___builtin_va_end:
1456                 return NULL;
1457         default:
1458                 panic("Unsupported builtin found\n");
1459         }
1460 }
1461
1462 /**
1463  * Transform a call expression.
1464  * Handles some special cases, like alloca() calls, which must be resolved BEFORE the inlines runs.
1465  * Inlining routines calling alloca() is dangerous, 176.gcc for instance might allocate 2GB instead of
1466  * 256 MB if alloca is not handled right...
1467  */
1468 static ir_node *call_expression_to_firm(const call_expression_t *call)
1469 {
1470         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1471         assert(get_cur_block() != NULL);
1472
1473         expression_t *function = call->function;
1474         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1475                 return process_builtin_call(call);
1476         }
1477         if(function->kind == EXPR_REFERENCE) {
1478                 const reference_expression_t *ref = &function->reference;
1479                 declaration_t *declaration = ref->declaration;
1480
1481                 if((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1482                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1483                                 /* handle alloca() call */
1484                                 expression_t *argument = call->arguments->expression;
1485                                 ir_node      *size     = expression_to_firm(argument);
1486
1487                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1488
1489                                 ir_node *store  = get_store();
1490                                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1491                                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1492                                               stack_alloc);
1493                                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1494                                 set_store(proj_m);
1495                                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1496
1497                                 return res;
1498                         }
1499                 }
1500         }
1501         ir_node *callee = expression_to_firm(function);
1502
1503         type_t *type = skip_typeref(function->base.type);
1504         assert(is_type_pointer(type));
1505         pointer_type_t *pointer_type = &type->pointer;
1506         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1507         assert(is_type_function(points_to));
1508         function_type_t *function_type = &points_to->function;
1509
1510         int      n_parameters = 0;
1511         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1512         ir_type *new_method_type = NULL;
1513         if(function_type->variadic || function_type->unspecified_parameters) {
1514                 const call_argument_t *argument = call->arguments;
1515                 for( ; argument != NULL; argument = argument->next) {
1516                         ++n_parameters;
1517                 }
1518
1519                 /* we need to construct a new method type matching the call
1520                  * arguments... */
1521                 int n_res       = get_method_n_ress(ir_method_type);
1522                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1523                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1524                                                     n_parameters, n_res, dbgi);
1525                 set_method_calling_convention(new_method_type,
1526                                get_method_calling_convention(ir_method_type));
1527                 set_method_additional_properties(new_method_type,
1528                                get_method_additional_properties(ir_method_type));
1529                 set_method_variadicity(new_method_type,
1530                                        get_method_variadicity(ir_method_type));
1531
1532                 for(int i = 0; i < n_res; ++i) {
1533                         set_method_res_type(new_method_type, i,
1534                                             get_method_res_type(ir_method_type, i));
1535                 }
1536                 argument = call->arguments;
1537                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1538                         expression_t *expression = argument->expression;
1539                         ir_type      *irtype     = get_ir_type(expression->base.type);
1540                         set_method_param_type(new_method_type, i, irtype);
1541                 }
1542                 ir_method_type = new_method_type;
1543         } else {
1544                 n_parameters = get_method_n_params(ir_method_type);
1545         }
1546
1547         ir_node *in[n_parameters];
1548
1549         const call_argument_t *argument = call->arguments;
1550         for(int n = 0; n < n_parameters; ++n) {
1551                 expression_t *expression = argument->expression;
1552                 ir_node      *arg_node   = expression_to_firm(expression);
1553
1554                 arg_node = do_strict_conv(dbgi, arg_node);
1555
1556                 in[n] = arg_node;
1557
1558                 argument = argument->next;
1559         }
1560
1561         ir_node  *store = get_store();
1562         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1563                                      ir_method_type);
1564         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1565         set_store(mem);
1566
1567         type_t  *return_type = skip_typeref(function_type->return_type);
1568         ir_node *result      = NULL;
1569
1570         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1571                 ir_mode *mode;
1572                 if(is_type_scalar(return_type)) {
1573                         mode = get_ir_mode(return_type);
1574                 } else {
1575                         mode = mode_P_data;
1576                 }
1577                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1578                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1579         }
1580
1581         return result;
1582 }
1583
1584 static void statement_to_firm(statement_t *statement);
1585 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1586
1587 static ir_node *expression_to_addr(const expression_t *expression);
1588 static void create_condition_evaluation(const expression_t *expression,
1589                                         ir_node *true_block,
1590                                         ir_node *false_block);
1591
1592 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1593                          ir_node *value)
1594 {
1595         value = do_strict_conv(dbgi, value);
1596
1597         ir_node *memory = get_store();
1598
1599         if(is_type_scalar(type)) {
1600                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1601                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1602                 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1603                         set_Store_volatility(store, volatility_is_volatile);
1604                 set_store(store_mem);
1605         } else {
1606                 ir_type *irtype    = get_ir_type(type);
1607                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1608                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1609                 set_store(copyb_mem);
1610         }
1611 }
1612
1613 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1614 {
1615         tarval *all_one   = get_mode_all_one(mode);
1616         int     mode_size = get_mode_size_bits(mode);
1617
1618         assert(offset >= 0 && size >= 0);
1619         assert(offset + size <= mode_size);
1620         if(size == mode_size) {
1621                 return all_one;
1622         }
1623
1624         long    shiftr    = get_mode_size_bits(mode) - size;
1625         long    shiftl    = offset;
1626         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1627         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1628         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1629         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1630
1631         return mask1;
1632 }
1633
1634 static void bitfield_store_to_firm(const select_expression_t *expression,
1635                                    ir_node *addr, ir_node *value)
1636 {
1637         type_t       *type   = expression->base.type;
1638         ir_mode      *mode   = get_ir_mode(type);
1639
1640         assert(get_irn_mode(value) == mode || is_Bad(value));
1641
1642         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1643
1644         /* kill upper bits of value and shift to right position */
1645         ir_entity *entity       = expression->compound_entry->v.entity;
1646         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1647         ir_type   *entity_type  = get_entity_type(entity);
1648         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1649
1650         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1651         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1652         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1653         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1654         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1655         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1656
1657         /* load current value */
1658         ir_node  *mem             = get_store();
1659         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1660         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1661         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1662         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1663         tarval   *inv_mask        = tarval_not(shift_mask);
1664         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1665         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1666
1667         /* construct new value and store */
1668         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1669         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1670         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1671         set_store(store_mem);
1672
1673         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1674                 set_Load_volatility(load, volatility_is_volatile);
1675                 set_Store_volatility(store, volatility_is_volatile);
1676         }
1677 }
1678
1679 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1680                 ir_node *addr)
1681 {
1682         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1683         type_t   *type     = expression->base.type;
1684         ir_mode  *mode     = get_ir_mode(type);
1685         ir_node  *mem      = get_store();
1686         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1687         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1688         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1689
1690         load_res           = create_conv(dbgi, load_res, mode_int);
1691
1692         set_store(load_mem);
1693
1694         /* kill upper bits */
1695         ir_entity *entity       = expression->compound_entry->v.entity;
1696         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1697         ir_type   *entity_type  = get_entity_type(entity);
1698         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1699         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1700         assert(shift_bitsl >= 0);
1701         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1702         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1703         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1704
1705         long       shift_bitsr  = bitoffset + shift_bitsl;
1706         assert(shift_bitsr <= (long) machine_size);
1707         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1708         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1709         ir_node   *shiftr;
1710         if(mode_is_signed(mode)) {
1711                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1712         } else {
1713                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1714         }
1715
1716         return create_conv(dbgi, shiftr, mode);
1717 }
1718
1719 static void set_value_for_expression_addr(const expression_t *expression,
1720                                           ir_node *value, ir_node *addr)
1721 {
1722         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1723         value          = do_strict_conv(dbgi, value);
1724
1725         if (expression->kind == EXPR_REFERENCE) {
1726                 const reference_expression_t *ref = &expression->reference;
1727
1728                 declaration_t *declaration = ref->declaration;
1729                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1730                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1731                         set_value(declaration->v.value_number, value);
1732                         return;
1733                 }
1734         }
1735
1736         if (addr == NULL)
1737                 addr = expression_to_addr(expression);
1738
1739         type_t *type = skip_typeref(expression->base.type);
1740
1741         if (expression->kind == EXPR_SELECT) {
1742                 const select_expression_t *select = &expression->select;
1743
1744                 declaration_t *declaration = select->compound_entry;
1745                 if (declaration->type->kind == TYPE_BITFIELD) {
1746                         bitfield_store_to_firm(select, addr, value);
1747                         return;
1748                 }
1749         }
1750
1751         assign_value(dbgi, addr, type, value);
1752 }
1753
1754 static void set_value_for_expression(const expression_t *expression,
1755                                      ir_node *value)
1756 {
1757         set_value_for_expression_addr(expression, value, NULL);
1758 }
1759
1760 static ir_node *get_value_from_lvalue(const expression_t *expression,
1761                                       ir_node *addr)
1762 {
1763         if (expression->kind == EXPR_REFERENCE) {
1764                 const reference_expression_t *ref = &expression->reference;
1765
1766                 declaration_t *declaration = ref->declaration;
1767                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1768                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1769                         assert(addr == NULL);
1770                         ir_mode *mode = get_ir_mode(expression->base.type);
1771                         return get_value(declaration->v.value_number, mode);
1772                 }
1773         }
1774
1775         assert(addr != NULL);
1776         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1777
1778         ir_node *value;
1779         if (expression->kind == EXPR_SELECT &&
1780             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1781                 value = bitfield_extract_to_firm(&expression->select, addr);
1782         } else {
1783                 value = deref_address(dbgi, expression->base.type, addr);
1784         }
1785
1786         return value;
1787 }
1788
1789
1790 static ir_node *create_incdec(const unary_expression_t *expression)
1791 {
1792         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1793         const expression_t *value_expr = expression->value;
1794         ir_node            *addr       = expression_to_addr(value_expr);
1795         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1796
1797         type_t  *type = skip_typeref(expression->base.type);
1798         ir_mode *mode = get_ir_mode(expression->base.type);
1799
1800         ir_node *offset;
1801         if(is_type_pointer(type)) {
1802                 pointer_type_t *pointer_type = &type->pointer;
1803                 offset                       = get_type_size(pointer_type->points_to);
1804         } else {
1805                 assert(is_type_arithmetic(type));
1806                 offset = new_Const(mode, get_mode_one(mode));
1807         }
1808
1809         ir_node *result;
1810         ir_node *store_value;
1811         switch(expression->base.kind) {
1812         case EXPR_UNARY_POSTFIX_INCREMENT:
1813                 result      = value;
1814                 store_value = new_d_Add(dbgi, value, offset, mode);
1815                 break;
1816         case EXPR_UNARY_POSTFIX_DECREMENT:
1817                 result      = value;
1818                 store_value = new_d_Sub(dbgi, value, offset, mode);
1819                 break;
1820         case EXPR_UNARY_PREFIX_INCREMENT:
1821                 result      = new_d_Add(dbgi, value, offset, mode);
1822                 store_value = result;
1823                 break;
1824         case EXPR_UNARY_PREFIX_DECREMENT:
1825                 result      = new_d_Sub(dbgi, value, offset, mode);
1826                 store_value = result;
1827                 break;
1828         default:
1829                 panic("no incdec expr in create_incdec");
1830         }
1831
1832         set_value_for_expression_addr(value_expr, store_value, addr);
1833
1834         return result;
1835 }
1836
1837 static bool is_local_variable(expression_t *expression)
1838 {
1839         if (expression->kind != EXPR_REFERENCE)
1840                 return false;
1841         reference_expression_t *ref_expr    = &expression->reference;
1842         declaration_t          *declaration = ref_expr->declaration;
1843         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1844 }
1845
1846 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1847 {
1848         switch(kind) {
1849         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1850         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1851         case EXPR_BINARY_NOTEQUAL:
1852                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1853         case EXPR_BINARY_ISLESS:
1854         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1855         case EXPR_BINARY_ISLESSEQUAL:
1856         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1857         case EXPR_BINARY_ISGREATER:
1858         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1859         case EXPR_BINARY_ISGREATEREQUAL:
1860         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1861         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1862
1863         default:
1864                 break;
1865         }
1866         panic("trying to get pn_Cmp from non-comparison binexpr type");
1867 }
1868
1869 /**
1870  * Handle the assume optimizer hint: check if a Confirm
1871  * node can be created.
1872  *
1873  * @param dbi    debug info
1874  * @param expr   the IL assume expression
1875  *
1876  * we support here only some simple cases:
1877  *  - var rel const
1878  *  - const rel val
1879  *  - var rel var
1880  */
1881 static ir_node *handle_assume_compare(dbg_info *dbi,
1882                                       const binary_expression_t *expression)
1883 {
1884         expression_t  *op1 = expression->left;
1885         expression_t  *op2 = expression->right;
1886         declaration_t *var2, *var = NULL;
1887         ir_node       *res = NULL;
1888         pn_Cmp         cmp_val;
1889
1890         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1891
1892         if (is_local_variable(op1) && is_local_variable(op2)) {
1893         var  = op1->reference.declaration;
1894             var2 = op2->reference.declaration;
1895
1896                 type_t  *const type = skip_typeref(var->type);
1897                 ir_mode *const mode = get_ir_mode(type);
1898
1899                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1900                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1901
1902                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1903                 set_value(var2->v.value_number, res);
1904
1905                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1906                 set_value(var->v.value_number, res);
1907
1908                 return res;
1909         }
1910
1911         expression_t *con;
1912         if (is_local_variable(op1) && is_constant_expression(op2)) {
1913                 var = op1->reference.declaration;
1914                 con = op2;
1915         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1916                 cmp_val = get_inversed_pnc(cmp_val);
1917                 var = op2->reference.declaration;
1918                 con = op1;
1919         }
1920
1921         if (var != NULL) {
1922                 type_t  *const type = skip_typeref(var->type);
1923                 ir_mode *const mode = get_ir_mode(type);
1924
1925                 res = get_value(var->v.value_number, mode);
1926                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1927                 set_value(var->v.value_number, res);
1928         }
1929         return res;
1930 }
1931
1932 /**
1933  * Handle the assume optimizer hint.
1934  *
1935  * @param dbi    debug info
1936  * @param expr   the IL assume expression
1937  */
1938 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1939         switch(expression->kind) {
1940         case EXPR_BINARY_EQUAL:
1941         case EXPR_BINARY_NOTEQUAL:
1942         case EXPR_BINARY_LESS:
1943         case EXPR_BINARY_LESSEQUAL:
1944         case EXPR_BINARY_GREATER:
1945         case EXPR_BINARY_GREATEREQUAL:
1946                 return handle_assume_compare(dbi, &expression->binary);
1947         default:
1948                 return NULL;
1949         }
1950 }
1951
1952 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1953 {
1954         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1955         type_t   *type = skip_typeref(expression->base.type);
1956
1957         if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1958                 return expression_to_addr(expression->value);
1959
1960         const expression_t *value = expression->value;
1961
1962         switch(expression->base.kind) {
1963         case EXPR_UNARY_NEGATE: {
1964                 ir_node *value_node = expression_to_firm(value);
1965                 ir_mode *mode = get_ir_mode(type);
1966                 return new_d_Minus(dbgi, value_node, mode);
1967         }
1968         case EXPR_UNARY_PLUS:
1969                 return expression_to_firm(value);
1970         case EXPR_UNARY_BITWISE_NEGATE: {
1971                 ir_node *value_node = expression_to_firm(value);
1972                 ir_mode *mode = get_ir_mode(type);
1973                 return new_d_Not(dbgi, value_node, mode);
1974         }
1975         case EXPR_UNARY_NOT: {
1976                 ir_node *value_node = _expression_to_firm(value);
1977                 value_node          = create_conv(dbgi, value_node, mode_b);
1978                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
1979                 return res;
1980         }
1981         case EXPR_UNARY_DEREFERENCE: {
1982                 ir_node *value_node = expression_to_firm(value);
1983                 type_t  *value_type = skip_typeref(value->base.type);
1984                 assert(is_type_pointer(value_type));
1985                 type_t  *points_to  = value_type->pointer.points_to;
1986                 return deref_address(dbgi, points_to, value_node);
1987         }
1988         case EXPR_UNARY_POSTFIX_INCREMENT:
1989         case EXPR_UNARY_POSTFIX_DECREMENT:
1990         case EXPR_UNARY_PREFIX_INCREMENT:
1991         case EXPR_UNARY_PREFIX_DECREMENT:
1992                 return create_incdec(expression);
1993         case EXPR_UNARY_CAST: {
1994                 ir_node *value_node = expression_to_firm(value);
1995                 if(is_type_scalar(type)) {
1996                         ir_mode *mode = get_ir_mode(type);
1997                         ir_node *node = create_conv(dbgi, value_node, mode);
1998                         node = do_strict_conv(dbgi, node);
1999                         return node;
2000                 } else {
2001                         /* make sure firm type is constructed */
2002                         (void) get_ir_type(type);
2003                         return value_node;
2004                 }
2005         }
2006         case EXPR_UNARY_CAST_IMPLICIT: {
2007                 ir_node *value_node = expression_to_firm(value);
2008                 if(is_type_scalar(type)) {
2009                         ir_mode *mode = get_ir_mode(type);
2010                         return create_conv(dbgi, value_node, mode);
2011                 } else {
2012                         return value_node;
2013                 }
2014         }
2015         case EXPR_UNARY_ASSUME:
2016                 if(firm_opt.confirm)
2017                         return handle_assume(dbgi, value);
2018                 else
2019                         return NULL;
2020
2021         default:
2022                 break;
2023         }
2024         panic("invalid UNEXPR type found");
2025 }
2026
2027 /**
2028  * produces a 0/1 depending of the value of a mode_b node
2029  */
2030 static ir_node *produce_condition_result(const expression_t *expression,
2031                                          dbg_info *dbgi)
2032 {
2033         ir_mode *mode      = get_ir_mode(expression->base.type);
2034         ir_node *cur_block = get_cur_block();
2035
2036         ir_node *one_block = new_immBlock();
2037         ir_node *one       = new_Const(mode, get_mode_one(mode));
2038         ir_node *jmp_one   = new_d_Jmp(dbgi);
2039
2040         ir_node *zero_block = new_immBlock();
2041         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2042         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2043
2044         set_cur_block(cur_block);
2045         create_condition_evaluation(expression, one_block, zero_block);
2046         mature_immBlock(one_block);
2047         mature_immBlock(zero_block);
2048
2049         ir_node *common_block = new_immBlock();
2050         add_immBlock_pred(common_block, jmp_one);
2051         add_immBlock_pred(common_block, jmp_zero);
2052         mature_immBlock(common_block);
2053
2054         ir_node *in[2] = { one, zero };
2055         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2056
2057         return val;
2058 }
2059
2060 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2061                 ir_node *value, type_t *type)
2062 {
2063         pointer_type_t *const pointer_type = &type->pointer;
2064         type_t         *const points_to    = pointer_type->points_to;
2065         const unsigned        elem_size    = get_type_size_const(points_to);
2066
2067         assert(elem_size >= 1);
2068         if (elem_size == 1)
2069                 return value;
2070
2071         value = create_conv(dbgi, value, mode_int);
2072         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2073         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2074         return mul;
2075 }
2076
2077 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2078                           ir_node *left, ir_node *right)
2079 {
2080         ir_mode  *mode;
2081         type_t   *type_left  = skip_typeref(expression->left->base.type);
2082         type_t   *type_right = skip_typeref(expression->right->base.type);
2083
2084         expression_kind_t kind = expression->base.kind;
2085
2086         switch (kind) {
2087         case EXPR_BINARY_SHIFTLEFT:
2088         case EXPR_BINARY_SHIFTRIGHT:
2089         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2090         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2091                 mode  = get_irn_mode(left);
2092                 right = create_conv(dbgi, right, mode_uint);
2093                 break;
2094
2095         case EXPR_BINARY_SUB:
2096                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2097                         const pointer_type_t *const ptr_type = &type_left->pointer;
2098
2099                         mode = get_ir_mode(expression->base.type);
2100                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2101                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2102                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2103                         ir_node *const no_mem    = new_NoMem();
2104                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2105                                                                                                    mode, op_pin_state_floats);
2106                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2107                 }
2108                 /* fallthrough */
2109         case EXPR_BINARY_SUB_ASSIGN:
2110                 if (is_type_pointer(type_left)) {
2111                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2112                         mode  = get_ir_mode(type_left);
2113                         break;
2114                 }
2115                 goto normal_node;
2116
2117         case EXPR_BINARY_ADD:
2118         case EXPR_BINARY_ADD_ASSIGN:
2119                 if (is_type_pointer(type_left)) {
2120                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2121                         mode  = get_ir_mode(type_left);
2122                         break;
2123                 } else if (is_type_pointer(type_right)) {
2124                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2125                         mode  = get_ir_mode(type_right);
2126                         break;
2127                 }
2128                 goto normal_node;
2129
2130         default:
2131 normal_node:
2132                 mode = get_irn_mode(right);
2133                 left = create_conv(dbgi, left, mode);
2134                 break;
2135         }
2136
2137         switch (kind) {
2138         case EXPR_BINARY_ADD_ASSIGN:
2139         case EXPR_BINARY_ADD:
2140                 return new_d_Add(dbgi, left, right, mode);
2141         case EXPR_BINARY_SUB_ASSIGN:
2142         case EXPR_BINARY_SUB:
2143                 return new_d_Sub(dbgi, left, right, mode);
2144         case EXPR_BINARY_MUL_ASSIGN:
2145         case EXPR_BINARY_MUL:
2146                 return new_d_Mul(dbgi, left, right, mode);
2147         case EXPR_BINARY_BITWISE_AND:
2148         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2149                 return new_d_And(dbgi, left, right, mode);
2150         case EXPR_BINARY_BITWISE_OR:
2151         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2152                 return new_d_Or(dbgi, left, right, mode);
2153         case EXPR_BINARY_BITWISE_XOR:
2154         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2155                 return new_d_Eor(dbgi, left, right, mode);
2156         case EXPR_BINARY_SHIFTLEFT:
2157         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2158                 return new_d_Shl(dbgi, left, right, mode);
2159         case EXPR_BINARY_SHIFTRIGHT:
2160         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2161                 if (mode_is_signed(mode)) {
2162                         return new_d_Shrs(dbgi, left, right, mode);
2163                 } else {
2164                         return new_d_Shr(dbgi, left, right, mode);
2165                 }
2166         case EXPR_BINARY_DIV:
2167         case EXPR_BINARY_DIV_ASSIGN: {
2168                 ir_node *pin = new_Pin(new_NoMem());
2169                 ir_node *op;
2170                 ir_node *res;
2171                 if(mode_is_float(mode)) {
2172                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2173                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2174                 } else {
2175                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2176                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2177                 }
2178                 return res;
2179         }
2180         case EXPR_BINARY_MOD:
2181         case EXPR_BINARY_MOD_ASSIGN: {
2182                 ir_node *pin = new_Pin(new_NoMem());
2183                 assert(!mode_is_float(mode));
2184                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2185                                          op_pin_state_floats);
2186                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2187                 return res;
2188         }
2189         default:
2190                 panic("unexpected expression kind");
2191         }
2192 }
2193
2194 static ir_node *create_lazy_op(const binary_expression_t *expression)
2195 {
2196         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2197         type_t   *type = expression->base.type;
2198         ir_mode  *mode = get_ir_mode(type);
2199
2200         if(is_constant_expression(expression->left)) {
2201                 long val = fold_constant(expression->left);
2202                 expression_kind_t ekind = expression->base.kind;
2203                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
2204                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2205                         return expression_to_firm(expression->right);
2206                 } else {
2207                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
2208                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
2209                         return new_Const(mode, get_mode_one(mode));
2210                 }
2211         }
2212
2213         return produce_condition_result((const expression_t*) expression, dbgi);
2214 }
2215
2216 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2217                                             ir_node *right, ir_mode *mode);
2218
2219 static ir_node *create_assign_binop(const binary_expression_t *expression)
2220 {
2221         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2222         const expression_t *left_expr = expression->left;
2223         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2224         ir_node            *left_addr = expression_to_addr(left_expr);
2225         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2226         ir_node            *right     = expression_to_firm(expression->right);
2227         ir_node            *result    = create_op(dbgi, expression, left, right);
2228
2229         result = create_conv(dbgi, result, left_mode);
2230         result = do_strict_conv(dbgi, result);
2231
2232         set_value_for_expression_addr(left_expr, result, left_addr);
2233
2234         return result;
2235 }
2236
2237 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2238 {
2239         expression_kind_t kind = expression->base.kind;
2240
2241         switch(kind) {
2242         case EXPR_BINARY_EQUAL:
2243         case EXPR_BINARY_NOTEQUAL:
2244         case EXPR_BINARY_LESS:
2245         case EXPR_BINARY_LESSEQUAL:
2246         case EXPR_BINARY_GREATER:
2247         case EXPR_BINARY_GREATEREQUAL:
2248         case EXPR_BINARY_ISGREATER:
2249         case EXPR_BINARY_ISGREATEREQUAL:
2250         case EXPR_BINARY_ISLESS:
2251         case EXPR_BINARY_ISLESSEQUAL:
2252         case EXPR_BINARY_ISLESSGREATER:
2253         case EXPR_BINARY_ISUNORDERED: {
2254                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2255                 ir_node *left  = expression_to_firm(expression->left);
2256                 ir_node *right = expression_to_firm(expression->right);
2257                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2258                 long     pnc   = get_pnc(kind, expression->left->base.type);
2259                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2260                 return proj;
2261         }
2262         case EXPR_BINARY_ASSIGN: {
2263                 ir_node *right = expression_to_firm(expression->right);
2264                 set_value_for_expression(expression->left, right);
2265
2266                 return right;
2267         }
2268         case EXPR_BINARY_ADD:
2269         case EXPR_BINARY_SUB:
2270         case EXPR_BINARY_MUL:
2271         case EXPR_BINARY_DIV:
2272         case EXPR_BINARY_MOD:
2273         case EXPR_BINARY_BITWISE_AND:
2274         case EXPR_BINARY_BITWISE_OR:
2275         case EXPR_BINARY_BITWISE_XOR:
2276         case EXPR_BINARY_SHIFTLEFT:
2277         case EXPR_BINARY_SHIFTRIGHT:
2278         {
2279                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2280                 ir_node  *left  = expression_to_firm(expression->left);
2281                 ir_node  *right = expression_to_firm(expression->right);
2282                 return create_op(dbgi, expression, left, right);
2283         }
2284         case EXPR_BINARY_LOGICAL_AND:
2285         case EXPR_BINARY_LOGICAL_OR:
2286                 return create_lazy_op(expression);
2287         case EXPR_BINARY_COMMA:
2288                 /* create side effects of left side */
2289                 (void) expression_to_firm(expression->left);
2290                 return _expression_to_firm(expression->right);
2291
2292         case EXPR_BINARY_ADD_ASSIGN:
2293         case EXPR_BINARY_SUB_ASSIGN:
2294         case EXPR_BINARY_MUL_ASSIGN:
2295         case EXPR_BINARY_MOD_ASSIGN:
2296         case EXPR_BINARY_DIV_ASSIGN:
2297         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2298         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2299         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2300         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2301         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2302                 return create_assign_binop(expression);
2303         case EXPR_BINARY_BUILTIN_EXPECT:
2304                 return _expression_to_firm(expression->left);
2305         default:
2306                 panic("TODO binexpr type");
2307         }
2308 }
2309
2310 static ir_node *array_access_addr(const array_access_expression_t *expression)
2311 {
2312         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2313         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2314         ir_node  *offset    = expression_to_firm(expression->index);
2315
2316         type_t  *offset_type = skip_typeref(expression->index->base.type);
2317         ir_mode *mode;
2318         if (is_type_signed(offset_type)) {
2319                 mode = get_ir_mode(type_ssize_t);
2320         } else {
2321                 mode = get_ir_mode(type_size_t);
2322         }
2323         offset = create_conv(dbgi, offset, mode);
2324
2325         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2326         assert(is_type_pointer(ref_type));
2327         pointer_type_t *pointer_type = &ref_type->pointer;
2328
2329         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2330         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2331         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2332                                              mode);
2333         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2334
2335         return result;
2336 }
2337
2338 static ir_node *array_access_to_firm(
2339                 const array_access_expression_t *expression)
2340 {
2341         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2342         ir_node  *addr   = array_access_addr(expression);
2343         type_t   *type   = revert_automatic_type_conversion(
2344                         (const expression_t*) expression);
2345         type             = skip_typeref(type);
2346
2347         return deref_address(dbgi, type, addr);
2348 }
2349
2350 static long get_offsetof_offset(const offsetof_expression_t *expression)
2351 {
2352         type_t *orig_type = expression->type;
2353         long    offset    = 0;
2354
2355         designator_t *designator = expression->designator;
2356         for( ; designator != NULL; designator = designator->next) {
2357                 type_t *type = skip_typeref(orig_type);
2358                 /* be sure the type is constructed */
2359                 (void) get_ir_type(type);
2360
2361                 if(designator->symbol != NULL) {
2362                         assert(is_type_compound(type));
2363                         symbol_t *symbol = designator->symbol;
2364
2365                         declaration_t *declaration = type->compound.declaration;
2366                         declaration_t *iter        = declaration->scope.declarations;
2367                         for( ; iter != NULL; iter = iter->next) {
2368                                 if(iter->symbol == symbol) {
2369                                         break;
2370                                 }
2371                         }
2372                         assert(iter != NULL);
2373
2374                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2375                         offset += get_entity_offset(iter->v.entity);
2376
2377                         orig_type = iter->type;
2378                 } else {
2379                         expression_t *array_index = designator->array_index;
2380                         assert(designator->array_index != NULL);
2381                         assert(is_type_array(type));
2382                         assert(is_type_valid(array_index->base.type));
2383
2384                         long index         = fold_constant(array_index);
2385                         ir_type *arr_type  = get_ir_type(type);
2386                         ir_type *elem_type = get_array_element_type(arr_type);
2387                         long     elem_size = get_type_size_bytes(elem_type);
2388
2389                         offset += index * elem_size;
2390
2391                         orig_type = type->array.element_type;
2392                 }
2393         }
2394
2395         return offset;
2396 }
2397
2398 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2399 {
2400         ir_mode  *mode   = get_ir_mode(expression->base.type);
2401         long      offset = get_offsetof_offset(expression);
2402         tarval   *tv     = new_tarval_from_long(offset, mode);
2403         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2404
2405         return new_d_Const(dbgi, mode, tv);
2406 }
2407
2408 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2409                                      ir_entity *entity, type_t *type);
2410
2411 static ir_node *compound_literal_to_firm(
2412                 const compound_literal_expression_t *expression)
2413 {
2414         type_t *type = expression->type;
2415
2416         /* create an entity on the stack */
2417         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2418
2419         ident     *const id     = id_unique("CompLit.%u");
2420         ir_type   *const irtype = get_ir_type(type);
2421         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2422         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2423         set_entity_ld_ident(entity, id);
2424
2425         set_entity_variability(entity, variability_uninitialized);
2426
2427         /* create initialisation code */
2428         initializer_t *initializer = expression->initializer;
2429         create_local_initializer(initializer, dbgi, entity, type);
2430
2431         /* create a sel for the compound literal address */
2432         ir_node *frame = get_local_frame(entity);
2433         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2434         return sel;
2435 }
2436
2437 /**
2438  * Transform a sizeof expression into Firm code.
2439  */
2440 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2441 {
2442         type_t *type = expression->type;
2443         if(type == NULL) {
2444                 type = expression->tp_expression->base.type;
2445                 assert(type != NULL);
2446         }
2447
2448         type = skip_typeref(type);
2449         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2450         if(is_type_array(type) && type->array.is_vla
2451                         && expression->tp_expression != NULL) {
2452                 expression_to_firm(expression->tp_expression);
2453         }
2454
2455         return get_type_size(type);
2456 }
2457
2458 /**
2459  * Transform an alignof expression into Firm code.
2460  */
2461 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2462 {
2463         type_t *type = expression->type;
2464         if(type == NULL) {
2465                 /* beware: if expression is a variable reference, return the
2466                    alignment of the variable. */
2467                 const expression_t *tp_expression = expression->tp_expression;
2468                 const declaration_t *declaration = expr_is_variable(tp_expression);
2469                 if (declaration != NULL) {
2470                         /* TODO: get the alignment of this variable. */
2471                 }
2472                 type = tp_expression->base.type;
2473                 assert(type != NULL);
2474         }
2475
2476         ir_mode *const mode = get_ir_mode(expression->base.type);
2477         symconst_symbol sym;
2478         sym.type_p = get_ir_type(type);
2479         return new_SymConst(mode, sym, symconst_type_align);
2480 }
2481
2482 static bool constant_folding;
2483
2484 static void init_ir_types(void);
2485 long fold_constant(const expression_t *expression)
2486 {
2487         bool constant_folding_old = constant_folding;
2488         constant_folding = true;
2489
2490         init_ir_types();
2491
2492         assert(is_constant_expression(expression));
2493
2494         ir_graph *old_current_ir_graph = current_ir_graph;
2495         if(current_ir_graph == NULL) {
2496                 current_ir_graph = get_const_code_irg();
2497         }
2498
2499         ir_node *cnst = expression_to_firm(expression);
2500         current_ir_graph = old_current_ir_graph;
2501
2502         if(!is_Const(cnst)) {
2503                 panic("couldn't fold constant\n");
2504         }
2505
2506         tarval *tv = get_Const_tarval(cnst);
2507         if(!tarval_is_long(tv)) {
2508                 panic("result of constant folding is not integer\n");
2509         }
2510
2511         constant_folding = constant_folding_old;
2512
2513         return get_tarval_long(tv);
2514 }
2515
2516 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2517 {
2518         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2519
2520         /* first try to fold a constant condition */
2521         if(is_constant_expression(expression->condition)) {
2522                 long val = fold_constant(expression->condition);
2523                 if(val) {
2524                         return expression_to_firm(expression->true_expression);
2525                 } else {
2526                         return expression_to_firm(expression->false_expression);
2527                 }
2528         }
2529
2530         ir_node *cur_block   = get_cur_block();
2531
2532         /* create the true block */
2533         ir_node *true_block  = new_immBlock();
2534
2535         ir_node *true_val = expression_to_firm(expression->true_expression);
2536         ir_node *true_jmp = new_Jmp();
2537
2538         /* create the false block */
2539         ir_node *false_block = new_immBlock();
2540
2541         ir_node *false_val = expression_to_firm(expression->false_expression);
2542         ir_node *false_jmp = new_Jmp();
2543
2544         /* create the condition evaluation */
2545         set_cur_block(cur_block);
2546         create_condition_evaluation(expression->condition, true_block, false_block);
2547         mature_immBlock(true_block);
2548         mature_immBlock(false_block);
2549
2550         /* create the common block */
2551         ir_node *common_block = new_immBlock();
2552         add_immBlock_pred(common_block, true_jmp);
2553         add_immBlock_pred(common_block, false_jmp);
2554         mature_immBlock(common_block);
2555
2556         /* TODO improve static semantics, so either both or no values are NULL */
2557         if (true_val == NULL || false_val == NULL)
2558                 return NULL;
2559
2560         ir_node *in[2] = { true_val, false_val };
2561         ir_mode *mode  = get_irn_mode(true_val);
2562         assert(get_irn_mode(false_val) == mode);
2563         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2564
2565         return val;
2566 }
2567
2568 /**
2569  * Returns an IR-node representing the address of a field.
2570  */
2571 static ir_node *select_addr(const select_expression_t *expression)
2572 {
2573         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2574
2575         ir_node *compound_addr = expression_to_firm(expression->compound);
2576
2577         /* make sure the type is constructed */
2578         type_t *type = skip_typeref(expression->compound->base.type);
2579         if (is_type_pointer(type)) {
2580                 type = type->pointer.points_to;
2581         }
2582         (void) get_ir_type(type);
2583
2584         declaration_t *entry = expression->compound_entry;
2585         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2586         ir_entity     *entity = entry->v.entity;
2587
2588         assert(entity != NULL);
2589
2590         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2591
2592         return sel;
2593 }
2594
2595 static ir_node *select_to_firm(const select_expression_t *expression)
2596 {
2597         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2598         ir_node  *addr = select_addr(expression);
2599         type_t   *type = revert_automatic_type_conversion(
2600                         (const expression_t*) expression);
2601         type           = skip_typeref(type);
2602
2603         declaration_t *entry      = expression->compound_entry;
2604         type_t        *entry_type = skip_typeref(entry->type);
2605
2606         if (entry_type->kind == TYPE_BITFIELD) {
2607                 return bitfield_extract_to_firm(expression, addr);
2608         }
2609
2610         return deref_address(dbgi, type, addr);
2611 }
2612
2613 /* Values returned by __builtin_classify_type. */
2614 typedef enum gcc_type_class
2615 {
2616         no_type_class = -1,
2617         void_type_class,
2618         integer_type_class,
2619         char_type_class,
2620         enumeral_type_class,
2621         boolean_type_class,
2622         pointer_type_class,
2623         reference_type_class,
2624         offset_type_class,
2625         real_type_class,
2626         complex_type_class,
2627         function_type_class,
2628         method_type_class,
2629         record_type_class,
2630         union_type_class,
2631         array_type_class,
2632         string_type_class,
2633         set_type_class,
2634         file_type_class,
2635         lang_type_class
2636 } gcc_type_class;
2637
2638 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2639 {
2640         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2641
2642         gcc_type_class tc;
2643         switch (type->kind)
2644         {
2645                 case TYPE_ATOMIC: {
2646                         const atomic_type_t *const atomic_type = &type->atomic;
2647                         switch (atomic_type->akind) {
2648                                 /* should not be reached */
2649                                 case ATOMIC_TYPE_INVALID:
2650                                         tc = no_type_class;
2651                                         goto make_const;
2652
2653                                 /* gcc cannot do that */
2654                                 case ATOMIC_TYPE_VOID:
2655                                         tc = void_type_class;
2656                                         goto make_const;
2657
2658                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2659                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2660                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2661                                 case ATOMIC_TYPE_SHORT:
2662                                 case ATOMIC_TYPE_USHORT:
2663                                 case ATOMIC_TYPE_INT:
2664                                 case ATOMIC_TYPE_UINT:
2665                                 case ATOMIC_TYPE_LONG:
2666                                 case ATOMIC_TYPE_ULONG:
2667                                 case ATOMIC_TYPE_LONGLONG:
2668                                 case ATOMIC_TYPE_ULONGLONG:
2669                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2670                                         tc = integer_type_class;
2671                                         goto make_const;
2672
2673                                 case ATOMIC_TYPE_FLOAT:
2674                                 case ATOMIC_TYPE_DOUBLE:
2675                                 case ATOMIC_TYPE_LONG_DOUBLE:
2676                                         tc = real_type_class;
2677                                         goto make_const;
2678                         }
2679                         panic("Unexpected atomic type in classify_type_to_firm().");
2680                 }
2681
2682                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2683                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2684                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2685                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2686                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2687                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2688                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2689                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2690
2691                 /* gcc handles this as integer */
2692                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2693
2694                 case TYPE_BUILTIN:
2695                 /* typedef/typeof should be skipped already */
2696                 case TYPE_TYPEDEF:
2697                 case TYPE_TYPEOF:
2698                 case TYPE_INVALID:
2699                 case TYPE_ERROR:
2700                         break;
2701         }
2702         panic("unexpected TYPE classify_type_to_firm().");
2703
2704 make_const: ;
2705         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2706         ir_mode  *const mode = mode_int;
2707         tarval   *const tv   = new_tarval_from_long(tc, mode);
2708         return new_d_Const(dbgi, mode, tv);
2709 }
2710
2711 static ir_node *function_name_to_firm(
2712                 const funcname_expression_t *const expr)
2713 {
2714         switch(expr->kind) {
2715         case FUNCNAME_FUNCTION:
2716         case FUNCNAME_PRETTY_FUNCTION:
2717         case FUNCNAME_FUNCDNAME:
2718                 if (current_function_name == NULL) {
2719                         const source_position_t *const src_pos = &expr->base.source_position;
2720                         const char *const name = current_function_decl->symbol->string;
2721                         const string_t string = { name, strlen(name) + 1 };
2722                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2723                 }
2724                 return current_function_name;
2725         case FUNCNAME_FUNCSIG:
2726                 if (current_funcsig == NULL) {
2727                         const source_position_t *const src_pos = &expr->base.source_position;
2728                         ir_entity *ent = get_irg_entity(current_ir_graph);
2729                         const char *const name = get_entity_ld_name(ent);
2730                         const string_t string = { name, strlen(name) + 1 };
2731                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2732                 }
2733                 return current_funcsig;
2734         }
2735         panic("Unsupported function name");
2736 }
2737
2738 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2739 {
2740         statement_t *statement = expr->statement;
2741
2742         assert(statement->kind == STATEMENT_COMPOUND);
2743         return compound_statement_to_firm(&statement->compound);
2744 }
2745
2746 static ir_node *va_start_expression_to_firm(
2747         const va_start_expression_t *const expr)
2748 {
2749         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2750         int        const n           = get_method_n_params(method_type) - 1;
2751         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2752         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2753         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2754         ir_node   *const no_mem      = new_NoMem();
2755         ir_node   *const arg_sel     =
2756                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2757
2758         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2759         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2760         set_value_for_expression(expr->ap, add);
2761
2762         return NULL;
2763 }
2764
2765 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2766 {
2767         type_t       *const type    = expr->base.type;
2768         expression_t *const ap_expr = expr->ap;
2769         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2770         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2771         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2772         ir_node      *const res     = deref_address(dbgi, type, ap);
2773
2774         ir_node      *const cnst    = get_type_size(expr->base.type);
2775         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2776
2777         set_value_for_expression_addr(ap_expr, add, ap_addr);
2778
2779         return res;
2780 }
2781
2782 static ir_node *dereference_addr(const unary_expression_t *const expression)
2783 {
2784         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2785         return expression_to_firm(expression->value);
2786 }
2787
2788 /**
2789  * Returns a IR-node representing an lvalue of the given expression.
2790  */
2791 static ir_node *expression_to_addr(const expression_t *expression)
2792 {
2793         switch(expression->kind) {
2794         case EXPR_REFERENCE:
2795                 return reference_addr(&expression->reference);
2796         case EXPR_ARRAY_ACCESS:
2797                 return array_access_addr(&expression->array_access);
2798         case EXPR_SELECT:
2799                 return select_addr(&expression->select);
2800         case EXPR_CALL:
2801                 return call_expression_to_firm(&expression->call);
2802         case EXPR_UNARY_DEREFERENCE: {
2803                 return dereference_addr(&expression->unary);
2804         }
2805         default:
2806                 break;
2807         }
2808         panic("trying to get address of non-lvalue");
2809 }
2810
2811 static ir_node *builtin_constant_to_firm(
2812                 const builtin_constant_expression_t *expression)
2813 {
2814         ir_mode *mode = get_ir_mode(expression->base.type);
2815         long     v;
2816
2817         if (is_constant_expression(expression->value)) {
2818                 v = 1;
2819         } else {
2820                 v = 0;
2821         }
2822         return new_Const_long(mode, v);
2823 }
2824
2825 static ir_node *builtin_prefetch_to_firm(
2826                 const builtin_prefetch_expression_t *expression)
2827 {
2828         ir_node *adr = expression_to_firm(expression->adr);
2829         /* no Firm support for prefetch yet */
2830         (void) adr;
2831         return NULL;
2832 }
2833
2834 /**
2835  * creates firm nodes for an expression. The difference between this function
2836  * and expression_to_firm is, that this version might produce mode_b nodes
2837  * instead of mode_Is.
2838  */
2839 static ir_node *_expression_to_firm(const expression_t *expression)
2840 {
2841 #ifndef NDEBUG
2842         if (!constant_folding) {
2843                 assert(!expression->base.transformed);
2844                 ((expression_t*) expression)->base.transformed = true;
2845         }
2846 #endif
2847
2848         switch(expression->kind) {
2849         case EXPR_CHARACTER_CONSTANT:
2850                 return character_constant_to_firm(&expression->conste);
2851         case EXPR_WIDE_CHARACTER_CONSTANT:
2852                 return wide_character_constant_to_firm(&expression->conste);
2853         case EXPR_CONST:
2854                 return const_to_firm(&expression->conste);
2855         case EXPR_STRING_LITERAL:
2856                 return string_literal_to_firm(&expression->string);
2857         case EXPR_WIDE_STRING_LITERAL:
2858                 return wide_string_literal_to_firm(&expression->wide_string);
2859         case EXPR_REFERENCE:
2860                 return reference_expression_to_firm(&expression->reference);
2861         case EXPR_CALL:
2862                 return call_expression_to_firm(&expression->call);
2863         EXPR_UNARY_CASES
2864                 return unary_expression_to_firm(&expression->unary);
2865         EXPR_BINARY_CASES
2866                 return binary_expression_to_firm(&expression->binary);
2867         case EXPR_ARRAY_ACCESS:
2868                 return array_access_to_firm(&expression->array_access);
2869         case EXPR_SIZEOF:
2870                 return sizeof_to_firm(&expression->typeprop);
2871         case EXPR_ALIGNOF:
2872                 return alignof_to_firm(&expression->typeprop);
2873         case EXPR_CONDITIONAL:
2874                 return conditional_to_firm(&expression->conditional);
2875         case EXPR_SELECT:
2876                 return select_to_firm(&expression->select);
2877         case EXPR_CLASSIFY_TYPE:
2878                 return classify_type_to_firm(&expression->classify_type);
2879         case EXPR_FUNCNAME:
2880                 return function_name_to_firm(&expression->funcname);
2881         case EXPR_STATEMENT:
2882                 return statement_expression_to_firm(&expression->statement);
2883         case EXPR_VA_START:
2884                 return va_start_expression_to_firm(&expression->va_starte);
2885         case EXPR_VA_ARG:
2886                 return va_arg_expression_to_firm(&expression->va_arge);
2887         case EXPR_BUILTIN_SYMBOL:
2888                 panic("unimplemented expression found");
2889         case EXPR_BUILTIN_CONSTANT_P:
2890                 return builtin_constant_to_firm(&expression->builtin_constant);
2891         case EXPR_BUILTIN_PREFETCH:
2892                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2893         case EXPR_OFFSETOF:
2894                 return offsetof_to_firm(&expression->offsetofe);
2895         case EXPR_COMPOUND_LITERAL:
2896                 return compound_literal_to_firm(&expression->compound_literal);
2897
2898         case EXPR_UNKNOWN:
2899         case EXPR_INVALID:
2900                 break;
2901         }
2902         panic("invalid expression found");
2903 }
2904
2905 static bool produces_mode_b(const expression_t *expression)
2906 {
2907         switch (expression->kind) {
2908         case EXPR_BINARY_EQUAL:
2909         case EXPR_BINARY_NOTEQUAL:
2910         case EXPR_BINARY_LESS:
2911         case EXPR_BINARY_LESSEQUAL:
2912         case EXPR_BINARY_GREATER:
2913         case EXPR_BINARY_GREATEREQUAL:
2914         case EXPR_BINARY_ISGREATER:
2915         case EXPR_BINARY_ISGREATEREQUAL:
2916         case EXPR_BINARY_ISLESS:
2917         case EXPR_BINARY_ISLESSEQUAL:
2918         case EXPR_BINARY_ISLESSGREATER:
2919         case EXPR_BINARY_ISUNORDERED:
2920         case EXPR_UNARY_NOT:
2921                 return true;
2922
2923         case EXPR_BINARY_BUILTIN_EXPECT:
2924                 return produces_mode_b(expression->binary.left);
2925         case EXPR_BINARY_COMMA:
2926                 return produces_mode_b(expression->binary.right);
2927
2928         default:
2929                 return false;
2930         }
2931 }
2932
2933 static ir_node *expression_to_firm(const expression_t *expression)
2934 {
2935         if (!produces_mode_b(expression)) {
2936                 ir_node *res = _expression_to_firm(expression);
2937                 assert(res == NULL || get_irn_mode(res) != mode_b);
2938                 return res;
2939         }
2940
2941         if (is_constant_expression(expression)) {
2942                 ir_node *res  = _expression_to_firm(expression);
2943                 ir_mode *mode = get_ir_mode(expression->base.type);
2944                 assert(is_Const(res));
2945                 if (is_Const_null(res)) {
2946                         return new_Const_long(mode, 0);
2947                 } else {
2948                         return new_Const_long(mode, 1);
2949                 }
2950         }
2951
2952         /* we have to produce a 0/1 from the mode_b expression */
2953         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2954         return produce_condition_result(expression, dbgi);
2955 }
2956
2957 static ir_node *expression_to_modeb(const expression_t *expression)
2958 {
2959         ir_node *res = _expression_to_firm(expression);
2960         res          = create_conv(NULL, res, mode_b);
2961
2962         return res;
2963 }
2964
2965 /**
2966  * create a short-circuit expression evaluation that tries to construct
2967  * efficient control flow structures for &&, || and ! expressions
2968  */
2969 static void create_condition_evaluation(const expression_t *expression,
2970                                         ir_node *true_block,
2971                                         ir_node *false_block)
2972 {
2973         switch(expression->kind) {
2974         case EXPR_UNARY_NOT: {
2975                 const unary_expression_t *unary_expression = &expression->unary;
2976                 create_condition_evaluation(unary_expression->value, false_block,
2977                                             true_block);
2978                 return;
2979         }
2980         case EXPR_BINARY_LOGICAL_AND: {
2981                 const binary_expression_t *binary_expression = &expression->binary;
2982
2983                 ir_node *cur_block   = get_cur_block();
2984                 ir_node *extra_block = new_immBlock();
2985                 set_cur_block(cur_block);
2986                 create_condition_evaluation(binary_expression->left, extra_block,
2987                                             false_block);
2988                 mature_immBlock(extra_block);
2989                 set_cur_block(extra_block);
2990                 create_condition_evaluation(binary_expression->right, true_block,
2991                                             false_block);
2992                 return;
2993         }
2994         case EXPR_BINARY_LOGICAL_OR: {
2995                 const binary_expression_t *binary_expression = &expression->binary;
2996
2997                 ir_node *cur_block   = get_cur_block();
2998                 ir_node *extra_block = new_immBlock();
2999                 set_cur_block(cur_block);
3000                 create_condition_evaluation(binary_expression->left, true_block,
3001                                             extra_block);
3002                 mature_immBlock(extra_block);
3003                 set_cur_block(extra_block);
3004                 create_condition_evaluation(binary_expression->right, true_block,
3005                                             false_block);
3006                 return;
3007         }
3008         default:
3009                 break;
3010         }
3011
3012         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3013         ir_node  *condition  = expression_to_modeb(expression);
3014         ir_node  *cond       = new_d_Cond(dbgi, condition);
3015         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3016         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3017
3018         /* set branch prediction info based on __builtin_expect */
3019         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3020                 long               cnst = fold_constant(expression->binary.right);
3021                 cond_jmp_predicate pred;
3022
3023                 if(cnst == 0) {
3024                         pred = COND_JMP_PRED_FALSE;
3025                 } else {
3026                         pred = COND_JMP_PRED_TRUE;
3027                 }
3028                 set_Cond_jmp_pred(cond, pred);
3029         }
3030
3031         add_immBlock_pred(true_block, true_proj);
3032         add_immBlock_pred(false_block, false_proj);
3033
3034         set_cur_block(NULL);
3035 }
3036
3037
3038
3039 static void create_declaration_entity(declaration_t *declaration,
3040                                       declaration_kind_t declaration_kind,
3041                                       ir_type *parent_type)
3042 {
3043         type_t    *const type   = skip_typeref(declaration->type);
3044         if (is_type_function(type)) {
3045                 (void) get_function_entity(declaration);
3046                 return;
3047         }
3048
3049         ident     *const id     = new_id_from_str(declaration->symbol->string);
3050         ir_type   *const irtype = get_ir_type(type);
3051         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3052         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3053
3054         declaration->declaration_kind = (unsigned char) declaration_kind;
3055         declaration->v.entity         = entity;
3056         set_entity_variability(entity, variability_uninitialized);
3057         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3058         if(parent_type == get_tls_type())
3059                 set_entity_allocation(entity, allocation_automatic);
3060         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3061                 set_entity_allocation(entity, allocation_static);
3062
3063         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3064                 set_entity_volatility(entity, volatility_is_volatile);
3065         }
3066 }
3067
3068
3069 typedef struct type_path_entry_t type_path_entry_t;
3070 struct type_path_entry_t {
3071         type_t           *type;
3072         ir_initializer_t *initializer;
3073         size_t            index;
3074         declaration_t    *compound_entry;
3075 };
3076
3077 typedef struct type_path_t type_path_t;
3078 struct type_path_t {
3079         type_path_entry_t *path;
3080         type_t            *top_type;
3081         bool               invalid;
3082 };
3083
3084 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3085 {
3086         size_t len = ARR_LEN(path->path);
3087
3088         for(size_t i = 0; i < len; ++i) {
3089                 const type_path_entry_t *entry = & path->path[i];
3090
3091                 type_t *type = skip_typeref(entry->type);
3092                 if(is_type_compound(type)) {
3093                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3094                 } else if(is_type_array(type)) {
3095                         fprintf(stderr, "[%zd]", entry->index);
3096                 } else {
3097                         fprintf(stderr, "-INVALID-");
3098                 }
3099         }
3100         fprintf(stderr, "  (");
3101         print_type(path->top_type);
3102         fprintf(stderr, ")");
3103 }
3104
3105 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3106 {
3107         size_t len = ARR_LEN(path->path);
3108         assert(len > 0);
3109         return & path->path[len-1];
3110 }
3111
3112 static type_path_entry_t *append_to_type_path(type_path_t *path)
3113 {
3114         size_t len = ARR_LEN(path->path);
3115         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3116
3117         type_path_entry_t *result = & path->path[len];
3118         memset(result, 0, sizeof(result[0]));
3119         return result;
3120 }
3121
3122 static size_t get_compound_size(const compound_type_t *type)
3123 {
3124         declaration_t *declaration = type->declaration;
3125         declaration_t *member      = declaration->scope.declarations;
3126         size_t         size        = 0;
3127         for( ; member != NULL; member = member->next) {
3128                 ++size;
3129         }
3130         /* TODO: cache results? */
3131
3132         return size;
3133 }
3134
3135 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3136 {
3137         type_t *orig_top_type = path->top_type;
3138         type_t *top_type      = skip_typeref(orig_top_type);
3139
3140         assert(is_type_compound(top_type) || is_type_array(top_type));
3141
3142         if(ARR_LEN(path->path) == 0) {
3143                 return NULL;
3144         } else {
3145                 type_path_entry_t *top         = get_type_path_top(path);
3146                 ir_initializer_t  *initializer = top->initializer;
3147                 return get_initializer_compound_value(initializer, top->index);
3148         }
3149 }
3150
3151 static void descend_into_subtype(type_path_t *path)
3152 {
3153         type_t *orig_top_type = path->top_type;
3154         type_t *top_type      = skip_typeref(orig_top_type);
3155
3156         assert(is_type_compound(top_type) || is_type_array(top_type));
3157
3158         ir_initializer_t *initializer = get_initializer_entry(path);
3159
3160         type_path_entry_t *top = append_to_type_path(path);
3161         top->type              = top_type;
3162
3163         size_t len;
3164
3165         if(is_type_compound(top_type)) {
3166                 declaration_t *declaration = top_type->compound.declaration;
3167                 declaration_t *entry       = declaration->scope.declarations;
3168
3169                 top->compound_entry = entry;
3170                 top->index          = 0;
3171                 len                 = get_compound_size(&top_type->compound);
3172                 if(entry != NULL)
3173                         path->top_type = entry->type;
3174         } else {
3175                 assert(is_type_array(top_type));
3176                 assert(top_type->array.size > 0);
3177
3178                 top->index     = 0;
3179                 path->top_type = top_type->array.element_type;
3180                 len            = top_type->array.size;
3181         }
3182         if(initializer == NULL
3183                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3184                 initializer = create_initializer_compound(len);
3185                 /* we have to set the entry at the 2nd latest path entry... */
3186                 size_t path_len = ARR_LEN(path->path);
3187                 assert(path_len >= 1);
3188                 if(path_len > 1) {
3189                         type_path_entry_t *entry        = & path->path[path_len-2];
3190                         ir_initializer_t  *tinitializer = entry->initializer;
3191                         set_initializer_compound_value(tinitializer, entry->index,
3192                                                        initializer);
3193                 }
3194         }
3195         top->initializer = initializer;
3196 }
3197
3198 static void ascend_from_subtype(type_path_t *path)
3199 {
3200         type_path_entry_t *top = get_type_path_top(path);
3201
3202         path->top_type = top->type;
3203
3204         size_t len = ARR_LEN(path->path);
3205         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3206 }
3207
3208 static void walk_designator(type_path_t *path, const designator_t *designator)
3209 {
3210         /* designators start at current object type */
3211         ARR_RESIZE(type_path_entry_t, path->path, 1);
3212
3213         for( ; designator != NULL; designator = designator->next) {
3214                 type_path_entry_t *top         = get_type_path_top(path);
3215                 type_t            *orig_type   = top->type;
3216                 type_t            *type        = skip_typeref(orig_type);
3217
3218                 if(designator->symbol != NULL) {
3219                         assert(is_type_compound(type));
3220                         size_t    index  = 0;
3221                         symbol_t *symbol = designator->symbol;
3222
3223                         declaration_t *declaration = type->compound.declaration;
3224                         declaration_t *iter        = declaration->scope.declarations;
3225                         for( ; iter != NULL; iter = iter->next, ++index) {
3226                                 if(iter->symbol == symbol) {
3227                                         break;
3228                                 }
3229                         }
3230                         assert(iter != NULL);
3231
3232                         top->type           = orig_type;
3233                         top->compound_entry = iter;
3234                         top->index          = index;
3235                         orig_type           = iter->type;
3236                 } else {
3237                         expression_t *array_index = designator->array_index;
3238                         assert(designator->array_index != NULL);
3239                         assert(is_type_array(type));
3240                         assert(is_type_valid(array_index->base.type));
3241
3242                         long index = fold_constant(array_index);
3243                         assert(index >= 0);
3244 #ifndef NDEBUG
3245                         if(type->array.size_constant == 1) {
3246                                 long array_size = type->array.size;
3247                                 assert(index < array_size);
3248                         }
3249 #endif
3250
3251                         top->type  = orig_type;
3252                         top->index = (size_t) index;
3253                         orig_type  = type->array.element_type;
3254                 }
3255                 path->top_type = orig_type;
3256
3257                 if(designator->next != NULL) {
3258                         descend_into_subtype(path);
3259                 }
3260         }
3261
3262         path->invalid  = false;
3263 }
3264
3265 static void advance_current_object(type_path_t *path)
3266 {
3267         if(path->invalid) {
3268                 /* TODO: handle this... */
3269                 panic("invalid initializer in ast2firm (excessive elements)");
3270                 return;
3271         }
3272
3273         type_path_entry_t *top = get_type_path_top(path);
3274
3275         type_t *type = skip_typeref(top->type);
3276         if(is_type_union(type)) {
3277                 top->compound_entry = NULL;
3278         } else if(is_type_struct(type)) {
3279                 declaration_t *entry = top->compound_entry;
3280
3281                 top->index++;
3282                 entry               = entry->next;
3283                 top->compound_entry = entry;
3284                 if(entry != NULL) {
3285                         path->top_type = entry->type;
3286                         return;
3287                 }
3288         } else {
3289                 assert(is_type_array(type));
3290
3291                 top->index++;
3292                 if(!type->array.size_constant || top->index < type->array.size) {
3293                         return;
3294                 }
3295         }
3296
3297         /* we're past the last member of the current sub-aggregate, try if we
3298          * can ascend in the type hierarchy and continue with another subobject */
3299         size_t len = ARR_LEN(path->path);
3300
3301         if(len > 1) {
3302                 ascend_from_subtype(path);
3303                 advance_current_object(path);
3304         } else {
3305                 path->invalid = true;
3306         }
3307 }
3308
3309
3310 static ir_initializer_t *create_ir_initializer(
3311                 const initializer_t *initializer, type_t *type);
3312
3313 static ir_initializer_t *create_ir_initializer_value(
3314                 const initializer_value_t *initializer)
3315 {
3316         if (is_type_compound(initializer->value->base.type)) {
3317                 panic("initializer creation for compounds not implemented yet");
3318         }
3319         ir_node *value = expression_to_firm(initializer->value);
3320         return create_initializer_const(value);
3321 }
3322
3323 static ir_initializer_t *create_ir_initializer_list(
3324                 const initializer_list_t *initializer, type_t *type)
3325 {
3326         type_path_t path;
3327         memset(&path, 0, sizeof(path));
3328         path.top_type = type;
3329         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3330
3331         descend_into_subtype(&path);
3332
3333         for(size_t i = 0; i < initializer->len; ++i) {
3334                 const initializer_t *sub_initializer = initializer->initializers[i];
3335
3336                 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3337                         walk_designator(&path, sub_initializer->designator.designator);
3338                         continue;
3339                 }
3340
3341                 if(sub_initializer->kind == INITIALIZER_VALUE) {
3342                         /* we might have to descend into types until we're at a scalar
3343                          * type */
3344                         while(true) {
3345                                 type_t *orig_top_type = path.top_type;
3346                                 type_t *top_type      = skip_typeref(orig_top_type);
3347
3348                                 if(is_type_scalar(top_type))
3349                                         break;
3350                                 descend_into_subtype(&path);
3351                         }
3352                 }
3353
3354                 ir_initializer_t *sub_irinitializer
3355                         = create_ir_initializer(sub_initializer, path.top_type);
3356
3357                 size_t path_len = ARR_LEN(path.path);
3358                 assert(path_len >= 1);
3359                 type_path_entry_t *entry        = & path.path[path_len-1];
3360                 ir_initializer_t  *tinitializer = entry->initializer;
3361                 set_initializer_compound_value(tinitializer, entry->index,
3362                                                sub_irinitializer);
3363
3364                 advance_current_object(&path);
3365         }
3366
3367         assert(ARR_LEN(path.path) >= 1);
3368         ir_initializer_t *result = path.path[0].initializer;
3369         DEL_ARR_F(path.path);
3370
3371         return result;
3372 }
3373
3374 static ir_initializer_t *create_ir_initializer_string(
3375                 const initializer_string_t *initializer, type_t *type)
3376 {
3377         type = skip_typeref(type);
3378
3379         size_t            string_len    = initializer->string.size;
3380         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3381         size_t            len           = type->array.size;
3382         ir_initializer_t *irinitializer = create_initializer_compound(len);
3383
3384         const char *string = initializer->string.begin;
3385         ir_mode    *mode   = get_type_mode(ir_type_const_char);
3386
3387         for(size_t i = 0; i < len; ++i) {
3388                 char c = 0;
3389                 if(i < string_len)
3390                         c = string[i];
3391
3392                 tarval           *tv = new_tarval_from_long(c, mode);
3393                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3394
3395                 set_initializer_compound_value(irinitializer, i, char_initializer);
3396         }
3397
3398         return irinitializer;
3399 }
3400
3401 static ir_initializer_t *create_ir_initializer_wide_string(
3402                 const initializer_wide_string_t *initializer, type_t *type)
3403 {
3404         size_t            string_len    = initializer->string.size;
3405         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3406         size_t            len           = type->array.size;
3407         ir_initializer_t *irinitializer = create_initializer_compound(len);
3408
3409         const wchar_rep_t *string = initializer->string.begin;
3410         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3411
3412         for(size_t i = 0; i < len; ++i) {
3413                 wchar_rep_t c = 0;
3414                 if(i < string_len) {
3415                         c = string[i];
3416                 }
3417                 tarval *tv = new_tarval_from_long(c, mode);
3418                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3419
3420                 set_initializer_compound_value(irinitializer, i, char_initializer);
3421         }
3422
3423         return irinitializer;
3424 }
3425
3426 static ir_initializer_t *create_ir_initializer(
3427                 const initializer_t *initializer, type_t *type)
3428 {
3429         switch(initializer->kind) {
3430                 case INITIALIZER_STRING:
3431                         return create_ir_initializer_string(&initializer->string, type);
3432
3433                 case INITIALIZER_WIDE_STRING:
3434                         return create_ir_initializer_wide_string(&initializer->wide_string,
3435                                                                  type);
3436
3437                 case INITIALIZER_LIST:
3438                         return create_ir_initializer_list(&initializer->list, type);
3439
3440                 case INITIALIZER_VALUE:
3441                         return create_ir_initializer_value(&initializer->value);
3442
3443                 case INITIALIZER_DESIGNATOR:
3444                         panic("unexpected designator initializer found");
3445         }
3446         panic("unknown initializer");
3447 }
3448
3449 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3450                 ir_node *base_addr)
3451 {
3452         if (is_atomic_type(type)) {
3453                 ir_mode *mode = get_type_mode(type);
3454                 tarval  *zero = get_mode_null(mode);
3455                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3456
3457                 /* TODO: bitfields */
3458                 ir_node *mem    = get_store();
3459                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3460                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3461                 set_store(proj_m);
3462         } else {
3463                 assert(is_compound_type(type));
3464
3465                 int n_members;
3466                 if(is_Array_type(type)) {
3467                         assert(has_array_upper_bound(type, 0));
3468                         n_members = get_array_upper_bound_int(type, 0);
3469                 } else {
3470                         n_members = get_compound_n_members(type);
3471                 }
3472
3473                 for(int i = 0; i < n_members; ++i) {
3474                         ir_node *addr;
3475                         ir_type *irtype;
3476                         if(is_Array_type(type)) {
3477                                 ir_entity *entity   = get_array_element_entity(type);
3478                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3479                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3480                                 ir_node   *in[1]    = { cnst };
3481                                 irtype = get_array_element_type(type);
3482                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3483                         } else {
3484                                 ir_entity *member = get_compound_member(type, i);
3485
3486                                 irtype = get_entity_type(member);
3487                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3488                         }
3489
3490                         create_dynamic_null_initializer(irtype, dbgi, addr);
3491                 }
3492         }
3493 }
3494
3495 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3496                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3497 {
3498         switch(get_initializer_kind(initializer)) {
3499         case IR_INITIALIZER_NULL: {
3500                 create_dynamic_null_initializer(type, dbgi, base_addr);
3501                 return;
3502         }
3503         case IR_INITIALIZER_CONST: {
3504                 ir_node *node = get_initializer_const_value(initializer);
3505                 ir_mode *mode = get_irn_mode(node);
3506                 assert(get_type_mode(type) == mode);
3507
3508                 /* TODO: bitfields... */
3509                 ir_node *mem    = get_store();
3510                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3511                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3512                 set_store(proj_m);
3513                 return;
3514         }
3515         case IR_INITIALIZER_TARVAL: {
3516                 tarval  *tv   = get_initializer_tarval_value(initializer);
3517                 ir_mode *mode = get_tarval_mode(tv);
3518                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3519                 assert(get_type_mode(type) == mode);
3520
3521                 /* TODO: bitfields... */
3522                 ir_node *mem    = get_store();
3523                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3524                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3525                 set_store(proj_m);
3526                 return;
3527         }
3528         case IR_INITIALIZER_COMPOUND: {
3529                 assert(is_compound_type(type));
3530                 int n_members;
3531                 if(is_Array_type(type)) {
3532                         assert(has_array_upper_bound(type, 0));
3533                         n_members = get_array_upper_bound_int(type, 0);
3534                 } else {
3535                         n_members = get_compound_n_members(type);
3536                 }
3537
3538                 if(get_initializer_compound_n_entries(initializer)
3539                                 != (unsigned) n_members)
3540                         panic("initializer doesn't match compound type");
3541
3542                 for(int i = 0; i < n_members; ++i) {
3543                         ir_node *addr;
3544                         ir_type *irtype;
3545                         if(is_Array_type(type)) {
3546                                 ir_entity *entity   = get_array_element_entity(type);
3547                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3548                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3549                                 ir_node   *in[1]    = { cnst };
3550                                 irtype = get_array_element_type(type);
3551                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3552                         } else {
3553                                 ir_entity *member = get_compound_member(type, i);
3554
3555                                 irtype = get_entity_type(member);
3556                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3557                         }
3558
3559                         ir_initializer_t *sub_init
3560                                 = get_initializer_compound_value(initializer, i);
3561
3562                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3563                 }
3564                 return;
3565         }
3566         }
3567
3568         panic("invalid IR_INITIALIZER found");
3569 }
3570
3571 static void create_dynamic_initializer(ir_initializer_t *initializer,
3572                 dbg_info *dbgi, ir_entity *entity)
3573 {
3574         ir_node *frame     = get_local_frame(entity);
3575         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3576         ir_type *type      = get_entity_type(entity);
3577
3578         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3579 }
3580
3581 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3582                                      ir_entity *entity, type_t *type)
3583 {
3584         ir_node *memory = get_store();
3585         ir_node *nomem  = new_NoMem();
3586         ir_node *frame  = get_irg_frame(current_ir_graph);
3587         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3588
3589         if(initializer->kind == INITIALIZER_VALUE) {
3590                 initializer_value_t *initializer_value = &initializer->value;
3591
3592                 ir_node *value = expression_to_firm(initializer_value->value);
3593                 type = skip_typeref(type);
3594                 assign_value(dbgi, addr, type, value);
3595                 return;
3596         }
3597
3598         if(!is_constant_initializer(initializer)) {
3599                 ir_initializer_t *irinitializer
3600                         = create_ir_initializer(initializer, type);
3601
3602                 create_dynamic_initializer(irinitializer, dbgi, entity);
3603                 return;
3604         }
3605
3606         /* create the ir_initializer */
3607         ir_graph *const old_current_ir_graph = current_ir_graph;
3608         current_ir_graph = get_const_code_irg();
3609
3610         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3611
3612         assert(current_ir_graph == get_const_code_irg());
3613         current_ir_graph = old_current_ir_graph;
3614
3615         /* create a "template" entity which is copied to the entity on the stack */
3616         ident     *const id          = id_unique("initializer.%u");
3617         ir_type   *const irtype      = get_ir_type(type);
3618         ir_type   *const global_type = get_glob_type();
3619         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3620         set_entity_ld_ident(init_entity, id);
3621
3622         set_entity_variability(init_entity, variability_initialized);
3623         set_entity_visibility(init_entity, visibility_local);
3624         set_entity_allocation(init_entity, allocation_static);
3625
3626         set_entity_initializer(init_entity, irinitializer);
3627
3628         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3629         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3630
3631         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3632         set_store(copyb_mem);
3633 }
3634
3635 static void create_initializer_local_variable_entity(declaration_t *declaration)
3636 {
3637         initializer_t *initializer = declaration->init.initializer;
3638         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3639         ir_entity     *entity      = declaration->v.entity;
3640         type_t        *type        = declaration->type;
3641         create_local_initializer(initializer, dbgi, entity, type);
3642 }
3643
3644 static void create_declaration_initializer(declaration_t *declaration)
3645 {
3646         initializer_t *initializer = declaration->init.initializer;
3647         if(initializer == NULL)
3648                 return;
3649
3650         declaration_kind_t declaration_kind
3651                 = (declaration_kind_t) declaration->declaration_kind;
3652         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3653                 create_initializer_local_variable_entity(declaration);
3654                 return;
3655         }
3656
3657         if(initializer->kind == INITIALIZER_VALUE) {
3658                 initializer_value_t *initializer_value = &initializer->value;
3659                 dbg_info            *dbgi
3660                         = get_dbg_info(&declaration->source_position);
3661
3662                 ir_node *value = expression_to_firm(initializer_value->value);
3663                 value = do_strict_conv(dbgi, value);
3664
3665                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3666                         set_value(declaration->v.value_number, value);
3667                 } else {
3668                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3669
3670                         ir_entity *entity = declaration->v.entity;
3671
3672                         set_entity_variability(entity, variability_initialized);
3673                         set_atomic_ent_value(entity, value);
3674                 }
3675         } else {
3676                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3677                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3678
3679                 ir_entity        *entity        = declaration->v.entity;
3680                 ir_initializer_t *irinitializer
3681                         = create_ir_initializer(initializer, declaration->type);
3682
3683                 set_entity_variability(entity, variability_initialized);
3684                 set_entity_initializer(entity, irinitializer);
3685         }
3686 }
3687
3688 static void create_variable_length_array(declaration_t *declaration)
3689 {
3690         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3691         type_t   *type      = declaration->type;
3692         ir_node  *mem       = get_store();
3693         ir_type  *el_type   = get_ir_type(type->array.element_type);
3694
3695         /* make sure size_node is calculated */
3696         get_type_size(type);
3697         ir_node  *elems = type->array.size_node;
3698         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3699
3700         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3701         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3702         set_store(proj_m);
3703
3704         /* initializers are not allowed for VLAs */
3705         assert(declaration->init.initializer == NULL);
3706
3707         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3708         declaration->v.vla_base       = addr;
3709
3710         /* TODO: record VLA somewhere so we create the free node when we leave
3711          * it's scope */
3712 }
3713
3714 /**
3715  * Creates a Firm local variable from a declaration.
3716  */
3717 static void create_local_variable(declaration_t *declaration)
3718 {
3719         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3720
3721         bool needs_entity = declaration->address_taken;
3722         type_t *type = skip_typeref(declaration->type);
3723
3724         /* is it a variable length array? */
3725         if(is_type_array(type) && !type->array.size_constant) {
3726                 create_variable_length_array(declaration);
3727                 return;
3728         } else if(is_type_array(type) || is_type_compound(type)) {
3729                 needs_entity = true;
3730         } else if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3731                 needs_entity = true;
3732         }
3733
3734         if(needs_entity) {
3735                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3736                 create_declaration_entity(declaration,
3737                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3738                                           frame_type);
3739         } else {
3740                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3741                 declaration->v.value_number   = next_value_number_function;
3742                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3743                 ++next_value_number_function;
3744         }
3745 }
3746
3747 static void create_local_static_variable(declaration_t *declaration)
3748 {
3749         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3750
3751         type_t    *const type        = skip_typeref(declaration->type);
3752         ir_type   *const global_type = get_glob_type();
3753         ir_type   *const irtype      = get_ir_type(type);
3754         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3755
3756         size_t l = strlen(declaration->symbol->string);
3757         char   buf[l + sizeof(".%u")];
3758         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3759         ident     *const id = id_unique(buf);
3760
3761         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3762
3763         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3764                 set_entity_volatility(entity, volatility_is_volatile);
3765         }
3766
3767         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3768         declaration->v.entity         = entity;
3769         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3770         set_entity_variability(entity, variability_uninitialized);
3771         set_entity_visibility(entity, visibility_local);
3772         set_entity_allocation(entity, allocation_static);
3773
3774         ir_graph *const old_current_ir_graph = current_ir_graph;
3775         current_ir_graph = get_const_code_irg();
3776
3777         create_declaration_initializer(declaration);
3778
3779         assert(current_ir_graph == get_const_code_irg());
3780         current_ir_graph = old_current_ir_graph;
3781 }
3782
3783
3784
3785 static void return_statement_to_firm(return_statement_t *statement)
3786 {
3787         if(get_cur_block() == NULL)
3788                 return;
3789
3790         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3791         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3792
3793
3794         ir_node *in[1];
3795         int      in_len;
3796         if(get_method_n_ress(func_irtype) > 0) {
3797                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3798
3799                 if(statement->value != NULL) {
3800                         ir_node *node = expression_to_firm(statement->value);
3801                         node  = do_strict_conv(dbgi, node);
3802                         in[0] = node;
3803                 } else {
3804                         ir_mode *mode;
3805                         if(is_compound_type(res_type)) {
3806                                 mode = mode_P_data;
3807                         } else {
3808                                 mode = get_type_mode(res_type);
3809                         }
3810                         in[0] = new_Unknown(mode);
3811                 }
3812                 in_len = 1;
3813         } else {
3814                 /* build return_value for its side effects */
3815                 if(statement->value != NULL) {
3816                         expression_to_firm(statement->value);
3817                 }
3818                 in_len = 0;
3819         }
3820
3821         ir_node  *store = get_store();
3822         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3823
3824         ir_node *end_block = get_irg_end_block(current_ir_graph);
3825         add_immBlock_pred(end_block, ret);
3826
3827         set_cur_block(NULL);
3828 }
3829
3830 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3831 {
3832         if(get_cur_block() == NULL)
3833                 return NULL;
3834
3835         return expression_to_firm(statement->expression);
3836 }
3837
3838 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3839 {
3840         declaration_t *declaration = compound->scope.declarations;
3841         for( ; declaration != NULL; declaration = declaration->next) {
3842                 create_local_declaration(declaration);
3843         }
3844
3845         ir_node     *result    = NULL;
3846         statement_t *statement = compound->statements;
3847         for( ; statement != NULL; statement = statement->base.next) {
3848                 if(statement->base.next == NULL
3849                                 && statement->kind == STATEMENT_EXPRESSION) {
3850                         result = expression_statement_to_firm(
3851                                         &statement->expression);
3852                         break;
3853                 }
3854                 statement_to_firm(statement);
3855         }
3856
3857         return result;
3858 }
3859
3860 static void create_global_variable(declaration_t *declaration)
3861 {
3862         ir_visibility  vis;
3863         ir_type       *var_type;
3864         switch ((storage_class_tag_t)declaration->storage_class) {
3865                 case STORAGE_CLASS_STATIC:
3866                         vis = visibility_local;
3867                         goto global_var;
3868
3869                 case STORAGE_CLASS_EXTERN:
3870                         vis = visibility_external_allocated;
3871                         goto global_var;
3872
3873                 case STORAGE_CLASS_NONE:
3874                         vis = visibility_external_visible;
3875                         goto global_var;
3876
3877                 case STORAGE_CLASS_THREAD:
3878                         vis = visibility_external_visible;
3879                         goto tls_var;
3880
3881                 case STORAGE_CLASS_THREAD_EXTERN:
3882                         vis = visibility_external_allocated;
3883                         goto tls_var;
3884
3885                 case STORAGE_CLASS_THREAD_STATIC:
3886                         vis = visibility_local;
3887                         goto tls_var;
3888
3889 tls_var:
3890                         var_type = get_tls_type();
3891                         goto create_var;
3892
3893 global_var:
3894                         var_type = get_glob_type();
3895                         goto create_var;
3896
3897 create_var:
3898                         create_declaration_entity(declaration,
3899                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3900                                                   var_type);
3901                         set_entity_visibility(declaration->v.entity, vis);
3902
3903                         return;
3904
3905                 case STORAGE_CLASS_TYPEDEF:
3906                 case STORAGE_CLASS_AUTO:
3907                 case STORAGE_CLASS_REGISTER:
3908                 case STORAGE_CLASS_ENUM_ENTRY:
3909                         break;
3910         }
3911         panic("Invalid storage class for global variable");
3912 }
3913
3914 static void create_local_declaration(declaration_t *declaration)
3915 {
3916         if (declaration->namespc != NAMESPACE_NORMAL)
3917                 return;
3918         /* construct type */
3919         (void) get_ir_type(declaration->type);
3920         if (declaration->symbol == NULL) {
3921                 return;
3922         }
3923
3924         type_t *type = skip_typeref(declaration->type);
3925
3926         switch ((storage_class_tag_t) declaration->storage_class) {
3927         case STORAGE_CLASS_STATIC:
3928                 create_local_static_variable(declaration);
3929                 return;
3930         case STORAGE_CLASS_EXTERN:
3931                 create_global_variable(declaration);
3932                 create_declaration_initializer(declaration);
3933                 return;
3934         case STORAGE_CLASS_NONE:
3935         case STORAGE_CLASS_AUTO:
3936         case STORAGE_CLASS_REGISTER:
3937                 if(is_type_function(type)) {
3938                         if(declaration->init.statement != NULL) {
3939                                 panic("nested functions not supported yet");
3940                         } else {
3941                                 get_function_entity(declaration);
3942                         }
3943                 } else {
3944                         create_local_variable(declaration);
3945                 }
3946                 return;
3947         case STORAGE_CLASS_ENUM_ENTRY:
3948                 /* should already be handled */
3949                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
3950                 return;
3951         case STORAGE_CLASS_TYPEDEF:
3952                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
3953                 return;
3954         case STORAGE_CLASS_THREAD:
3955         case STORAGE_CLASS_THREAD_EXTERN:
3956         case STORAGE_CLASS_THREAD_STATIC:
3957                 break;
3958         }
3959         panic("invalid storage class found");
3960 }
3961
3962 static void initialize_local_declaration(declaration_t *declaration)
3963 {
3964         if(declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
3965                 return;
3966
3967         switch ((declaration_kind_t) declaration->declaration_kind) {
3968         case DECLARATION_KIND_LOCAL_VARIABLE:
3969         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
3970                 create_declaration_initializer(declaration);
3971                 return;
3972
3973         case DECLARATION_KIND_LABEL_BLOCK:
3974         case DECLARATION_KIND_COMPOUND_MEMBER:
3975         case DECLARATION_KIND_GLOBAL_VARIABLE:
3976         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
3977         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
3978         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
3979         case DECLARATION_KIND_FUNCTION:
3980         case DECLARATION_KIND_TYPE:
3981         case DECLARATION_KIND_ENUM_ENTRY:
3982                 return;
3983
3984         case DECLARATION_KIND_UNKNOWN:
3985                 panic("can't initialize unknwon declaration");
3986         }
3987         panic("invalid declaration kind");
3988 }
3989
3990 static void declaration_statement_to_firm(declaration_statement_t *statement)
3991 {
3992         declaration_t *declaration = statement->declarations_begin;
3993         declaration_t *end         = statement->declarations_end->next;
3994         for( ; declaration != end; declaration = declaration->next) {
3995                 if(declaration->namespc != NAMESPACE_NORMAL)
3996                         continue;
3997                 initialize_local_declaration(declaration);
3998         }
3999 }
4000
4001 static void if_statement_to_firm(if_statement_t *statement)
4002 {
4003         ir_node *cur_block = get_cur_block();
4004
4005         ir_node *fallthrough_block = NULL;
4006
4007         /* the true (blocks) */
4008         ir_node *true_block = NULL;
4009         if (statement->true_statement != NULL) {
4010                 true_block = new_immBlock();
4011                 statement_to_firm(statement->true_statement);
4012                 if (get_cur_block() != NULL) {
4013                         ir_node *jmp = new_Jmp();
4014                         if (fallthrough_block == NULL)
4015                                 fallthrough_block = new_immBlock();
4016                         add_immBlock_pred(fallthrough_block, jmp);
4017                 }
4018         }
4019
4020         /* the false (blocks) */
4021         ir_node *false_block = NULL;
4022         if (statement->false_statement != NULL) {
4023                 false_block = new_immBlock();
4024
4025                 statement_to_firm(statement->false_statement);
4026                 if (get_cur_block() != NULL) {
4027                         ir_node *jmp = new_Jmp();
4028                         if (fallthrough_block == NULL)
4029                                 fallthrough_block = new_immBlock();
4030                         add_immBlock_pred(fallthrough_block, jmp);
4031                 }
4032         }
4033
4034         /* create the condition */
4035         if (cur_block != NULL) {
4036                 if (true_block == NULL || false_block == NULL) {
4037                         if (fallthrough_block == NULL)
4038                                 fallthrough_block = new_immBlock();
4039                         if (true_block == NULL)
4040                                 true_block = fallthrough_block;
4041                         if (false_block == NULL)
4042                                 false_block = fallthrough_block;
4043                 }
4044
4045                 set_cur_block(cur_block);
4046                 create_condition_evaluation(statement->condition, true_block,
4047                                             false_block);
4048         }
4049
4050         mature_immBlock(true_block);
4051         if (false_block != fallthrough_block) {
4052                 mature_immBlock(false_block);
4053         }
4054         if (fallthrough_block != NULL) {
4055                 mature_immBlock(fallthrough_block);
4056         }
4057
4058         set_cur_block(fallthrough_block);
4059 }
4060
4061 static void while_statement_to_firm(while_statement_t *statement)
4062 {
4063         ir_node *jmp = NULL;
4064         if(get_cur_block() != NULL) {
4065                 jmp = new_Jmp();
4066         }
4067
4068         /* create the header block */
4069         ir_node *header_block = new_immBlock();
4070         if(jmp != NULL) {
4071                 add_immBlock_pred(header_block, jmp);
4072         }
4073
4074         /* the false block */
4075         ir_node *false_block = new_immBlock();
4076
4077         /* the loop body */
4078         ir_node *body_block;
4079         if (statement->body != NULL) {
4080                 ir_node *old_continue_label = continue_label;
4081                 ir_node *old_break_label    = break_label;
4082                 continue_label              = header_block;
4083                 break_label                 = false_block;
4084
4085                 body_block = new_immBlock();
4086                 statement_to_firm(statement->body);
4087
4088                 assert(continue_label == header_block);
4089                 assert(break_label    == false_block);
4090                 continue_label = old_continue_label;
4091                 break_label    = old_break_label;
4092
4093                 if(get_cur_block() != NULL) {
4094                         jmp = new_Jmp();
4095                         add_immBlock_pred(header_block, jmp);
4096                 }
4097         } else {
4098                 body_block = header_block;
4099         }
4100
4101         /* create the condition */
4102         set_cur_block(header_block);
4103
4104         create_condition_evaluation(statement->condition, body_block, false_block);
4105         mature_immBlock(body_block);
4106         mature_immBlock(false_block);
4107         mature_immBlock(header_block);
4108
4109         set_cur_block(false_block);
4110 }
4111
4112 static void do_while_statement_to_firm(do_while_statement_t *statement)
4113 {
4114         ir_node *jmp = NULL;
4115         if(get_cur_block() != NULL) {
4116                 jmp = new_Jmp();
4117         }
4118
4119         /* create the header block */
4120         ir_node *header_block = new_immBlock();
4121
4122         /* the false block */
4123         ir_node *false_block = new_immBlock();
4124
4125         /* the loop body */
4126         ir_node *body_block = new_immBlock();
4127         if(jmp != NULL) {
4128                 add_immBlock_pred(body_block, jmp);
4129         }
4130
4131         if (statement->body != NULL) {
4132                 ir_node *old_continue_label = continue_label;
4133                 ir_node *old_break_label    = break_label;
4134                 continue_label              = header_block;
4135                 break_label                 = false_block;
4136
4137                 statement_to_firm(statement->body);
4138
4139                 assert(continue_label == header_block);
4140                 assert(break_label    == false_block);
4141                 continue_label = old_continue_label;
4142                 break_label    = old_break_label;
4143
4144                 if (get_cur_block() == NULL) {
4145                         mature_immBlock(header_block);
4146                         mature_immBlock(body_block);
4147                         mature_immBlock(false_block);
4148                         return;
4149                 }
4150         }
4151
4152         ir_node *body_jmp = new_Jmp();
4153         add_immBlock_pred(header_block, body_jmp);
4154         mature_immBlock(header_block);
4155
4156         /* create the condition */
4157         set_cur_block(header_block);
4158
4159         create_condition_evaluation(statement->condition, body_block, false_block);
4160         mature_immBlock(body_block);
4161         mature_immBlock(false_block);
4162         mature_immBlock(header_block);
4163
4164         set_cur_block(false_block);
4165 }
4166
4167 static void for_statement_to_firm(for_statement_t *statement)
4168 {
4169         ir_node *jmp = NULL;
4170
4171         /* create declarations */
4172         declaration_t *declaration = statement->scope.declarations;
4173         for( ; declaration != NULL; declaration = declaration->next) {
4174                 create_local_declaration(declaration);
4175         }
4176         declaration = statement->scope.declarations;
4177         for( ; declaration != NULL; declaration = declaration->next) {
4178                 initialize_local_declaration(declaration);
4179         }
4180
4181         if (get_cur_block() != NULL) {
4182                 if(statement->initialisation != NULL) {
4183                         expression_to_firm(statement->initialisation);
4184                 }
4185
4186                 jmp = new_Jmp();
4187         }
4188
4189
4190         /* create the step block */
4191         ir_node *const step_block = new_immBlock();
4192         if (statement->step != NULL) {
4193                 expression_to_firm(statement->step);
4194         }
4195         ir_node *const step_jmp = new_Jmp();
4196
4197         /* create the header block */
4198         ir_node *const header_block = new_immBlock();
4199         if (jmp != NULL) {
4200                 add_immBlock_pred(header_block, jmp);
4201         }
4202         add_immBlock_pred(header_block, step_jmp);
4203
4204         /* the false block */
4205         ir_node *const false_block = new_immBlock();
4206
4207         /* the loop body */
4208         ir_node * body_block;
4209         if (statement->body != NULL) {
4210                 ir_node *const old_continue_label = continue_label;
4211                 ir_node *const old_break_label    = break_label;
4212                 continue_label = step_block;
4213                 break_label    = false_block;
4214
4215                 body_block = new_immBlock();
4216                 statement_to_firm(statement->body);
4217
4218                 assert(continue_label == step_block);
4219                 assert(break_label    == false_block);
4220                 continue_label = old_continue_label;
4221                 break_label    = old_break_label;
4222
4223                 if (get_cur_block() != NULL) {
4224                         jmp = new_Jmp();
4225                         add_immBlock_pred(step_block, jmp);
4226                 }
4227         } else {
4228                 body_block = step_block;
4229         }
4230
4231         /* create the condition */
4232         set_cur_block(header_block);
4233         if (statement->condition != NULL) {
4234                 create_condition_evaluation(statement->condition, body_block,
4235                                             false_block);
4236         } else {
4237                 keep_alive(header_block);
4238                 jmp = new_Jmp();
4239                 add_immBlock_pred(body_block, jmp);
4240         }
4241
4242         mature_immBlock(body_block);
4243         mature_immBlock(false_block);
4244         mature_immBlock(step_block);
4245         mature_immBlock(header_block);
4246         mature_immBlock(false_block);
4247
4248         set_cur_block(false_block);
4249 }
4250
4251 static void create_jump_statement(const statement_t *statement,
4252                                   ir_node *target_block)
4253 {
4254         if(get_cur_block() == NULL)
4255                 return;
4256
4257         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4258         ir_node  *jump = new_d_Jmp(dbgi);
4259         add_immBlock_pred(target_block, jump);
4260
4261         set_cur_block(NULL);
4262 }
4263
4264 static ir_node *get_break_label(void)
4265 {
4266         if (break_label == NULL) {
4267                 ir_node *cur_block = get_cur_block();
4268                 break_label = new_immBlock();
4269                 set_cur_block(cur_block);
4270         }
4271         return break_label;
4272 }
4273
4274 static void switch_statement_to_firm(const switch_statement_t *statement)
4275 {
4276         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4277
4278         ir_node *expression  = expression_to_firm(statement->expression);
4279         ir_node *cond        = new_d_Cond(dbgi, expression);
4280
4281         set_cur_block(NULL);
4282
4283         ir_node *const old_switch_cond       = current_switch_cond;
4284         ir_node *const old_break_label       = break_label;
4285         const bool     old_saw_default_label = saw_default_label;
4286         saw_default_label                    = false;
4287         current_switch_cond                  = cond;
4288         break_label                          = NULL;
4289
4290         if (statement->body != NULL) {
4291                 statement_to_firm(statement->body);
4292         }
4293
4294         if (get_cur_block() != NULL) {
4295                 ir_node *jmp = new_Jmp();
4296                 add_immBlock_pred(get_break_label(), jmp);
4297         }
4298
4299         if (!saw_default_label) {
4300                 set_cur_block(get_nodes_block(cond));
4301                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4302                                                         MAGIC_DEFAULT_PN_NUMBER);
4303                 add_immBlock_pred(get_break_label(), proj);
4304         }
4305
4306         if (break_label != NULL) {
4307                 mature_immBlock(break_label);
4308         }
4309         set_cur_block(break_label);
4310
4311         assert(current_switch_cond == cond);
4312         current_switch_cond = old_switch_cond;
4313         break_label         = old_break_label;
4314         saw_default_label   = old_saw_default_label;
4315 }
4316
4317 static void case_label_to_firm(const case_label_statement_t *statement)
4318 {
4319         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4320
4321         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4322
4323         /* let's create a node and hope firm constant folding creates a Const
4324          * node... */
4325         ir_node *proj;
4326         ir_node *old_block = get_nodes_block(current_switch_cond);
4327         ir_node *block     = new_immBlock();
4328
4329         set_cur_block(old_block);
4330         if(statement->expression != NULL) {
4331                 long start_pn = fold_constant(statement->expression);
4332                 long end_pn = start_pn;
4333                 if (statement->end_range != NULL) {
4334                         end_pn = fold_constant(statement->end_range);
4335                 }
4336                 assert(start_pn <= end_pn);
4337                 /* create jumps for all cases in the given range */
4338                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4339                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
4340                                 /* oops someone detected our cheating... */
4341                                 panic("magic default pn used");
4342                         }
4343                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4344                         add_immBlock_pred(block, proj);
4345                 }
4346         } else {
4347                 saw_default_label = true;
4348                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4349                                          MAGIC_DEFAULT_PN_NUMBER);
4350
4351                 add_immBlock_pred(block, proj);
4352         }
4353
4354         if (fallthrough != NULL) {
4355                 add_immBlock_pred(block, fallthrough);
4356         }
4357         mature_immBlock(block);
4358         set_cur_block(block);
4359
4360         if(statement->statement != NULL) {
4361                 statement_to_firm(statement->statement);
4362         }
4363 }
4364
4365 static ir_node *get_label_block(declaration_t *label)
4366 {
4367         assert(label->namespc == NAMESPACE_LABEL);
4368
4369         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4370                 return label->v.block;
4371         }
4372         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4373
4374         ir_node *old_cur_block = get_cur_block();
4375         ir_node *block         = new_immBlock();
4376         set_cur_block(old_cur_block);
4377
4378         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4379         label->v.block          = block;
4380
4381         ARR_APP1(ir_node *, imature_blocks, block);
4382
4383         return block;
4384 }
4385
4386 static void label_to_firm(const label_statement_t *statement)
4387 {
4388         ir_node *block = get_label_block(statement->label);
4389
4390         if(get_cur_block() != NULL) {
4391                 ir_node *jmp = new_Jmp();
4392                 add_immBlock_pred(block, jmp);
4393         }
4394
4395         set_cur_block(block);
4396         keep_alive(block);
4397
4398         if(statement->statement != NULL) {
4399                 statement_to_firm(statement->statement);
4400         }
4401 }
4402
4403 static void goto_to_firm(const goto_statement_t *statement)
4404 {
4405         if(get_cur_block() == NULL)
4406                 return;
4407
4408         ir_node *block = get_label_block(statement->label);
4409         ir_node *jmp   = new_Jmp();
4410         add_immBlock_pred(block, jmp);
4411
4412         set_cur_block(NULL);
4413 }
4414
4415 typedef enum modifier_t {
4416         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
4417         ASM_MODIFIER_READ_WRITE   = 1 << 1,
4418         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
4419         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
4420 } modifier_t;
4421
4422 static void asm_statement_to_firm(const asm_statement_t *statement)
4423 {
4424         (void) statement;
4425         fprintf(stderr, "WARNING asm not implemented yet!\n");
4426 #if 0
4427         bool needs_memory = false;
4428
4429         size_t         n_clobbers = 0;
4430         asm_clobber_t *clobber    = statement->clobbers;
4431         for( ; clobber != NULL; clobber = clobber->next) {
4432                 if(strcmp(clobber->clobber, "memory") == 0) {
4433                         needs_memory = true;
4434                         continue;
4435                 }
4436
4437                 ident *id = new_id_from_str(clobber->clobber);
4438                 obstack_ptr_grow(&asm_obst, id);
4439                 ++n_clobbers;
4440         }
4441         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4442         ident **clobbers = NULL;
4443         if(n_clobbers > 0) {
4444                 clobbers = obstack_finish(&asm_obst);
4445         }
4446
4447         /* find and count input and output constraints */
4448         asm_constraint_t *constraint = statement->inputs;
4449         for( ; constraint != NULL; constraint = constraint->next) {
4450                 int  modifiers      = 0;
4451                 bool supports_memop = false;
4452                 for(const char *c = constraint->constraints; *c != 0; ++c) {
4453                         /* TODO: improve error messages */
4454                         switch(*c) {
4455                         case '?':
4456                         case '!':
4457                                 panic("multiple alternative assembler constraints not "
4458                                       "supported");
4459                         case 'm':
4460                         case 'o':
4461                         case 'V':
4462                         case '<':
4463                         case '>':
4464                         case 'X':
4465                                 supports_memop = true;
4466                                 obstack_1grow(&asm_obst, *c);
4467                                 break;
4468                         case '=':
4469                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
4470                                         panic("inconsistent register constraints");
4471                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4472                                 break;
4473                         case '+':
4474                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4475                                         panic("inconsistent register constraints");
4476                                 modifiers |= ASM_MODIFIER_READ_WRITE;
4477                                 break;
4478                         case '&':
4479                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4480                                 panic("early clobber assembler constraint not supported yet");
4481                                 break;
4482                         case '%':
4483                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4484                                 panic("commutative assembler constraint not supported yet");
4485                                 break;
4486                         case '#':
4487                                 /* skip register preferences stuff... */
4488                                 while(*c != 0 && *c != ',')
4489                                         ++c;
4490                                 break;
4491                         case '*':
4492                                 /* skip register preferences stuff... */
4493                                 ++c;
4494                                 break;
4495                         default:
4496                                 obstack_1grow(&asm_obst, *c);
4497                                 break;
4498                         }
4499                 }
4500                 obstack_1grow(&asm_obst, '\0');
4501                 const char *constraint_string = obstack_finish(&asm_obst);
4502
4503                 needs_memory |= supports_memop;
4504                 if(supports_memop) {
4505
4506                 }
4507         }
4508 #endif
4509 }
4510
4511 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4512         statement_to_firm(statement->try_statement);
4513         warningf(&statement->base.source_position, "structured exception handling ignored");
4514 }
4515
4516 static void     leave_statement_to_firm(leave_statement_t *statement) {
4517         errorf(&statement->base.source_position, "__leave not supported yet");
4518 }
4519
4520 /**
4521  * Transform a statement.
4522  */
4523 static void statement_to_firm(statement_t *statement)
4524 {
4525 #ifndef NDEBUG
4526         assert(!statement->base.transformed);
4527         statement->base.transformed = true;
4528 #endif
4529
4530         switch(statement->kind) {
4531         case STATEMENT_INVALID:
4532                 panic("invalid statement found");
4533                 return;
4534         case STATEMENT_EMPTY:
4535                 /* nothing */
4536                 return;
4537         case STATEMENT_COMPOUND:
4538                 compound_statement_to_firm(&statement->compound);
4539                 return;
4540         case STATEMENT_RETURN:
4541                 return_statement_to_firm(&statement->returns);
4542                 return;
4543         case STATEMENT_EXPRESSION:
4544                 expression_statement_to_firm(&statement->expression);
4545                 return;
4546         case STATEMENT_IF:
4547                 if_statement_to_firm(&statement->ifs);
4548                 return;
4549         case STATEMENT_WHILE:
4550                 while_statement_to_firm(&statement->whiles);
4551                 return;
4552         case STATEMENT_DO_WHILE:
4553                 do_while_statement_to_firm(&statement->do_while);
4554                 return;
4555         case STATEMENT_DECLARATION:
4556                 declaration_statement_to_firm(&statement->declaration);
4557                 return;
4558         case STATEMENT_BREAK:
4559                 create_jump_statement(statement, get_break_label());
4560                 return;
4561         case STATEMENT_CONTINUE:
4562                 create_jump_statement(statement, continue_label);
4563                 return;
4564         case STATEMENT_SWITCH:
4565                 switch_statement_to_firm(&statement->switchs);
4566                 return;
4567         case STATEMENT_CASE_LABEL:
4568                 case_label_to_firm(&statement->case_label);
4569                 return;
4570         case STATEMENT_FOR:
4571                 for_statement_to_firm(&statement->fors);
4572                 return;
4573         case STATEMENT_LABEL:
4574                 label_to_firm(&statement->label);
4575                 return;
4576         case STATEMENT_GOTO:
4577                 goto_to_firm(&statement->gotos);
4578                 return;
4579         case STATEMENT_ASM:
4580                 asm_statement_to_firm(&statement->asms);
4581                 return;
4582         case STATEMENT_MS_TRY:
4583                 ms_try_statement_to_firm(&statement->ms_try);
4584                 return;
4585         case STATEMENT_LEAVE:
4586                 leave_statement_to_firm(&statement->leave);
4587                 return;
4588         }
4589         panic("Statement not implemented\n");
4590 }
4591
4592 static int count_decls_in_expression(const expression_t *expression);
4593
4594 static int count_local_declarations(const declaration_t *      decl,
4595                                     const declaration_t *const end)
4596 {
4597         int count = 0;
4598         for (; decl != end; decl = decl->next) {
4599                 if(decl->namespc != NAMESPACE_NORMAL)
4600                         continue;
4601                 const type_t *type = skip_typeref(decl->type);
4602                 if (!decl->address_taken && is_type_scalar(type))
4603                         ++count;
4604                 const initializer_t *initializer = decl->init.initializer;
4605                 /* FIXME: should walk initializer hierarchies... */
4606                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4607                         count += count_decls_in_expression(initializer->value.value);
4608                 }
4609         }
4610         return count;
4611 }
4612
4613 static int count_decls_in_expression(const expression_t *expression) {
4614         int count = 0;
4615
4616         if(expression == NULL)
4617                 return 0;
4618
4619         switch((expression_kind_t) expression->base.kind) {
4620         case EXPR_STATEMENT:
4621                 return count_decls_in_stmts(expression->statement.statement);
4622         EXPR_BINARY_CASES {
4623                 int count_left  = count_decls_in_expression(expression->binary.left);
4624                 int count_right = count_decls_in_expression(expression->binary.right);
4625                 return count_left + count_right;
4626         }
4627         EXPR_UNARY_CASES
4628                 return count_decls_in_expression(expression->unary.value);
4629         case EXPR_CALL: {
4630                 call_argument_t *argument = expression->call.arguments;
4631                 for( ; argument != NULL; argument = argument->next) {
4632                         count += count_decls_in_expression(argument->expression);
4633                 }
4634                 return count;
4635         }
4636
4637         case EXPR_UNKNOWN:
4638         case EXPR_INVALID:
4639                 panic("unexpected expression kind");
4640
4641         case EXPR_COMPOUND_LITERAL:
4642                 /* TODO... */
4643                 break;
4644
4645         case EXPR_CONDITIONAL:
4646                 count += count_decls_in_expression(expression->conditional.condition);
4647                 count += count_decls_in_expression(expression->conditional.true_expression);
4648                 count += count_decls_in_expression(expression->conditional.false_expression);
4649                 return count;
4650
4651         case EXPR_BUILTIN_PREFETCH:
4652                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4653                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4654                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4655                 return count;
4656
4657         case EXPR_BUILTIN_CONSTANT_P:
4658                 count += count_decls_in_expression(expression->builtin_constant.value);
4659                 return count;
4660
4661         case EXPR_SELECT:
4662                 count += count_decls_in_expression(expression->select.compound);
4663                 return count;
4664
4665         case EXPR_ARRAY_ACCESS:
4666                 count += count_decls_in_expression(expression->array_access.array_ref);
4667                 count += count_decls_in_expression(expression->array_access.index);
4668                 return count;
4669
4670         case EXPR_CLASSIFY_TYPE:
4671                 count += count_decls_in_expression(expression->classify_type.type_expression);
4672                 return count;
4673
4674         case EXPR_SIZEOF:
4675         case EXPR_ALIGNOF: {
4676                 expression_t *tp_expression = expression->typeprop.tp_expression;
4677                 if (tp_expression != NULL) {
4678                         count += count_decls_in_expression(tp_expression);
4679                 }
4680                 return count;
4681         }
4682
4683         case EXPR_OFFSETOF:
4684         case EXPR_REFERENCE:
4685         case EXPR_CONST:
4686         case EXPR_CHARACTER_CONSTANT:
4687         case EXPR_WIDE_CHARACTER_CONSTANT:
4688         case EXPR_STRING_LITERAL:
4689         case EXPR_WIDE_STRING_LITERAL:
4690         case EXPR_FUNCNAME:
4691         case EXPR_BUILTIN_SYMBOL:
4692         case EXPR_VA_START:
4693         case EXPR_VA_ARG:
4694                 break;
4695         }
4696
4697         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4698          * (or implement all the missing expressions here/implement a walker)
4699          */
4700
4701         return 0;
4702 }
4703
4704 static int count_decls_in_stmts(const statement_t *stmt)
4705 {
4706         int count = 0;
4707         for (; stmt != NULL; stmt = stmt->base.next) {
4708                 switch (stmt->kind) {
4709                         case STATEMENT_EMPTY:
4710                                 break;
4711
4712                         case STATEMENT_DECLARATION: {
4713                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4714                                 count += count_local_declarations(decl_stmt->declarations_begin,
4715                                                                   decl_stmt->declarations_end->next);
4716                                 break;
4717                         }
4718
4719                         case STATEMENT_COMPOUND: {
4720                                 const compound_statement_t *const comp =
4721                                         &stmt->compound;
4722                                 count += count_decls_in_stmts(comp->statements);
4723                                 break;
4724                         }
4725
4726                         case STATEMENT_IF: {
4727                                 const if_statement_t *const if_stmt = &stmt->ifs;
4728                                 count += count_decls_in_expression(if_stmt->condition);
4729                                 count += count_decls_in_stmts(if_stmt->true_statement);
4730                                 count += count_decls_in_stmts(if_stmt->false_statement);
4731                                 break;
4732                         }
4733
4734                         case STATEMENT_SWITCH: {
4735                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4736                                 count += count_decls_in_expression(switch_stmt->expression);
4737                                 count += count_decls_in_stmts(switch_stmt->body);
4738                                 break;
4739                         }
4740
4741                         case STATEMENT_LABEL: {
4742                                 const label_statement_t *const label_stmt = &stmt->label;
4743                                 if(label_stmt->statement != NULL) {
4744                                         count += count_decls_in_stmts(label_stmt->statement);
4745                                 }
4746                                 break;
4747                         }
4748
4749                         case STATEMENT_WHILE: {
4750                                 const while_statement_t *const while_stmt = &stmt->whiles;
4751                                 count += count_decls_in_expression(while_stmt->condition);
4752                                 count += count_decls_in_stmts(while_stmt->body);
4753                                 break;
4754                         }
4755
4756                         case STATEMENT_DO_WHILE: {
4757                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4758                                 count += count_decls_in_expression(do_while_stmt->condition);
4759                                 count += count_decls_in_stmts(do_while_stmt->body);
4760                                 break;
4761                         }
4762
4763                         case STATEMENT_FOR: {
4764                                 const for_statement_t *const for_stmt = &stmt->fors;
4765                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4766                                 count += count_decls_in_expression(for_stmt->initialisation);
4767                                 count += count_decls_in_expression(for_stmt->condition);
4768                                 count += count_decls_in_expression(for_stmt->step);
4769                                 count += count_decls_in_stmts(for_stmt->body);
4770                                 break;
4771                         }
4772
4773                         case STATEMENT_CASE_LABEL: {
4774                                 const case_label_statement_t *label = &stmt->case_label;
4775                                 count += count_decls_in_expression(label->expression);
4776                                 if(label->statement != NULL) {
4777                                         count += count_decls_in_stmts(label->statement);
4778                                 }
4779                                 break;
4780                         }
4781
4782                         case STATEMENT_ASM:
4783                         case STATEMENT_BREAK:
4784                         case STATEMENT_CONTINUE:
4785                                 break;
4786
4787                         case STATEMENT_EXPRESSION: {
4788                                 const expression_statement_t *expr_stmt = &stmt->expression;
4789                                 count += count_decls_in_expression(expr_stmt->expression);
4790                                 break;
4791                         }
4792
4793                         case STATEMENT_GOTO:
4794                         case STATEMENT_LEAVE:
4795                         case STATEMENT_INVALID:
4796                                 break;
4797
4798                         case STATEMENT_RETURN: {
4799                                 const return_statement_t *ret_stmt = &stmt->returns;
4800                                 count += count_decls_in_expression(ret_stmt->value);
4801                                 break;
4802                         }
4803
4804                         case STATEMENT_MS_TRY: {
4805                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
4806                                 count += count_decls_in_stmts(try_stmt->try_statement);
4807                                 if(try_stmt->except_expression != NULL)
4808                                         count += count_decls_in_expression(try_stmt->except_expression);
4809                                 count += count_decls_in_stmts(try_stmt->final_statement);
4810                                 break;
4811                         }
4812                 }
4813         }
4814         return count;
4815 }
4816
4817 static int get_function_n_local_vars(declaration_t *declaration)
4818 {
4819         int count = 0;
4820
4821         /* count parameters */
4822         count += count_local_declarations(declaration->scope.declarations, NULL);
4823
4824         /* count local variables declared in body */
4825         count += count_decls_in_stmts(declaration->init.statement);
4826
4827         return count;
4828 }
4829
4830 static void initialize_function_parameters(declaration_t *declaration)
4831 {
4832         ir_graph        *irg             = current_ir_graph;
4833         ir_node         *args            = get_irg_args(irg);
4834         ir_node         *start_block     = get_irg_start_block(irg);
4835         ir_type         *function_irtype = get_ir_type(declaration->type);
4836
4837         int            n         = 0;
4838         declaration_t *parameter = declaration->scope.declarations;
4839         for( ; parameter != NULL; parameter = parameter->next, ++n) {
4840                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4841                 type_t *type = skip_typeref(parameter->type);
4842
4843                 bool needs_entity = parameter->address_taken;
4844                 assert(!is_type_array(type));
4845                 if(is_type_compound(type)) {
4846                         needs_entity = true;
4847                 }
4848
4849                 if(needs_entity) {
4850                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4851                         ident     *id     = new_id_from_str(parameter->symbol->string);
4852                         set_entity_ident(entity, id);
4853
4854                         parameter->declaration_kind
4855                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4856                         parameter->v.entity = entity;
4857                         continue;
4858                 }
4859
4860                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
4861                 ir_mode *param_mode   = get_type_mode(param_irtype);
4862
4863                 long     pn    = n;
4864                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
4865
4866                 ir_mode *mode = get_ir_mode(parameter->type);
4867                 value = create_conv(NULL, value, mode);
4868                 value = do_strict_conv(NULL, value);
4869
4870                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4871                 parameter->v.value_number   = next_value_number_function;
4872                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4873                 ++next_value_number_function;
4874
4875                 set_value(parameter->v.value_number, value);
4876         }
4877 }
4878
4879 /**
4880  * Handle additional decl modifiers for IR-graphs
4881  *
4882  * @param irg            the IR-graph
4883  * @param dec_modifiers  additional modifiers
4884  */
4885 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4886 {
4887         if (decl_modifiers & DM_NORETURN) {
4888                 /* TRUE if the declaration includes the Microsoft
4889                    __declspec(noreturn) specifier. */
4890                 set_irg_additional_property(irg, mtp_property_noreturn);
4891         }
4892         if (decl_modifiers & DM_NOTHROW) {
4893                 /* TRUE if the declaration includes the Microsoft
4894                    __declspec(nothrow) specifier. */
4895                 set_irg_additional_property(irg, mtp_property_nothrow);
4896         }
4897         if (decl_modifiers & DM_NAKED) {
4898                 /* TRUE if the declaration includes the Microsoft
4899                    __declspec(naked) specifier. */
4900                 set_irg_additional_property(irg, mtp_property_naked);
4901         }
4902         if (decl_modifiers & DM_FORCEINLINE) {
4903                 /* TRUE if the declaration includes the
4904                    Microsoft __forceinline specifier. */
4905                 set_irg_inline_property(irg, irg_inline_forced);
4906         }
4907         if (decl_modifiers & DM_NOINLINE) {
4908                 /* TRUE if the declaration includes the Microsoft
4909                    __declspec(noinline) specifier. */
4910                 set_irg_inline_property(irg, irg_inline_forbidden);
4911         }
4912 }
4913
4914 /**
4915  * Create code for a function.
4916  */
4917 static void create_function(declaration_t *declaration)
4918 {
4919         ir_entity *function_entity = get_function_entity(declaration);
4920
4921         if(declaration->init.statement == NULL)
4922                 return;
4923
4924         current_function_decl = declaration;
4925         current_function_name = NULL;
4926         current_funcsig       = NULL;
4927
4928         assert(imature_blocks == NULL);
4929         imature_blocks = NEW_ARR_F(ir_node*, 0);
4930
4931         int       n_local_vars = get_function_n_local_vars(declaration);
4932         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4933
4934         set_irg_fp_model(irg, firm_opt.fp_model);
4935         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
4936         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
4937
4938         ir_node *first_block = get_cur_block();
4939
4940         /* set inline flags */
4941         if (declaration->is_inline)
4942                 set_irg_inline_property(irg, irg_inline_recomended);
4943         handle_decl_modifier_irg(irg, declaration->decl_modifiers);
4944
4945         next_value_number_function = 0;
4946         initialize_function_parameters(declaration);
4947
4948         statement_to_firm(declaration->init.statement);
4949
4950         ir_node *end_block = get_irg_end_block(irg);
4951
4952         /* do we have a return statement yet? */
4953         if(get_cur_block() != NULL) {
4954                 type_t *type = skip_typeref(declaration->type);
4955                 assert(is_type_function(type));
4956                 const function_type_t *func_type   = &type->function;
4957                 const type_t          *return_type
4958                         = skip_typeref(func_type->return_type);
4959
4960                 ir_node *ret;
4961                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4962                         ret = new_Return(get_store(), 0, NULL);
4963                 } else {
4964                         ir_mode *mode;
4965                         if(is_type_scalar(return_type)) {
4966                                 mode = get_ir_mode(func_type->return_type);
4967                         } else {
4968                                 mode = mode_P_data;
4969                         }
4970
4971                         ir_node *in[1];
4972                         /* §5.1.2.2.3 main implicitly returns 0 */
4973                         if (strcmp(declaration->symbol->string, "main") == 0) {
4974                                 in[0] = new_Const(mode, get_mode_null(mode));
4975                         } else {
4976                                 in[0] = new_Unknown(mode);
4977                                 if(warning.return_type) {
4978                                         warningf(&declaration->source_position,
4979                                                 "missing return statement at end of non-void function '%Y'",
4980                                                 declaration->symbol);
4981                                 }
4982                         }
4983                         ret = new_Return(get_store(), 1, in);
4984                 }
4985                 add_immBlock_pred(end_block, ret);
4986         }
4987
4988         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4989                 mature_immBlock(imature_blocks[i]);
4990         }
4991         DEL_ARR_F(imature_blocks);
4992         imature_blocks = NULL;
4993
4994         mature_immBlock(first_block);
4995         mature_immBlock(end_block);
4996
4997         irg_finalize_cons(irg);
4998
4999         /* finalize the frame type */
5000         ir_type *frame_type = get_irg_frame_type(irg);
5001         int      n          = get_compound_n_members(frame_type);
5002         int      align_all  = 4;
5003         int      offset     = 0;
5004         for(int i = 0; i < n; ++i) {
5005                 ir_entity *entity      = get_compound_member(frame_type, i);
5006                 ir_type   *entity_type = get_entity_type(entity);
5007
5008                 int align = get_type_alignment_bytes(entity_type);
5009                 if(align > align_all)
5010                         align_all = align;
5011                 int misalign = 0;
5012                 if(align > 0) {
5013                         misalign  = offset % align;
5014                         if(misalign > 0) {
5015                                 offset += align - misalign;
5016                         }
5017                 }
5018
5019                 set_entity_offset(entity, offset);
5020                 offset += get_type_size_bytes(entity_type);
5021         }
5022         set_type_size_bytes(frame_type, offset);
5023         set_type_alignment_bytes(frame_type, align_all);
5024
5025         irg_vrfy(irg);
5026 }
5027
5028 static void scope_to_firm(scope_t *scope)
5029 {
5030         /* first pass: create declarations */
5031         declaration_t *declaration = scope->declarations;
5032         for( ; declaration != NULL; declaration = declaration->next) {
5033                 if(declaration->namespc != NAMESPACE_NORMAL)
5034                         continue;
5035                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5036                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5037                         continue;
5038                 if(declaration->symbol == NULL)
5039                         continue;
5040
5041                 type_t *type = skip_typeref(declaration->type);
5042                 if(is_type_function(type)) {
5043                         get_function_entity(declaration);
5044                 } else {
5045                         create_global_variable(declaration);
5046                 }
5047         }
5048
5049         /* second pass: create code/initializers */
5050         declaration = scope->declarations;
5051         for( ; declaration != NULL; declaration = declaration->next) {
5052                 if(declaration->namespc != NAMESPACE_NORMAL)
5053                         continue;
5054                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5055                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5056                         continue;
5057                 if(declaration->symbol == NULL)
5058                         continue;
5059
5060                 type_t *type = declaration->type;
5061                 if(type->kind == TYPE_FUNCTION) {
5062                         create_function(declaration);
5063                 } else {
5064                         assert(declaration->declaration_kind
5065                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5066                         current_ir_graph = get_const_code_irg();
5067                         create_declaration_initializer(declaration);
5068                 }
5069         }
5070 }
5071
5072 void init_ast2firm(void)
5073 {
5074         obstack_init(&asm_obst);
5075         init_atomic_modes();
5076
5077         id_underscore = new_id_from_chars("_", 1);
5078         id_imp        = new_id_from_chars("__imp_", 6);
5079
5080         /* OS option must be set to the backend */
5081         const char *s = "ia32-gasmode=linux";
5082         switch (firm_opt.os_support) {
5083         case OS_SUPPORT_MINGW:
5084                 create_ld_ident = create_ld_ident_win32;
5085                 s = "ia32-gasmode=mingw";
5086                 break;
5087         case OS_SUPPORT_LINUX:
5088                 create_ld_ident = create_ld_ident_linux_elf;
5089                 s = "ia32-gasmode=linux"; break;
5090                 break;
5091         case OS_SUPPORT_MACHO:
5092                 create_ld_ident = create_ld_ident_macho;
5093                 s = "ia32-gasmode=macho"; break;
5094                 break;
5095         }
5096         firm_be_option(s);
5097
5098         /* create idents for all known runtime functions */
5099         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5100                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5101         }
5102
5103         entitymap_init(&entitymap);
5104 }
5105
5106 static void init_ir_types(void)
5107 {
5108         static int ir_types_initialized = 0;
5109         if(ir_types_initialized)
5110                 return;
5111         ir_types_initialized = 1;
5112
5113         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
5114         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
5115         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
5116
5117         ir_type_int        = get_ir_type(type_int);
5118         ir_type_const_char = get_ir_type(type_const_char);
5119         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5120         ir_type_void       = get_ir_type(type_void);
5121 }
5122
5123 void exit_ast2firm(void)
5124 {
5125         entitymap_destroy(&entitymap);
5126         obstack_free(&asm_obst, NULL);
5127 }
5128
5129 void translation_unit_to_firm(translation_unit_t *unit)
5130 {
5131         /* just to be sure */
5132         continue_label      = NULL;
5133         break_label         = NULL;
5134         current_switch_cond = NULL;
5135
5136         init_ir_types();
5137
5138         scope_to_firm(&unit->scope);
5139 }