nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19 #include "parser.h"
  20 #include "lang_features.h"
  21 #include "driver/firm_opt.h"
  22 #include "driver/firm_cmdline.h"
  23
  24 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  25
  26 static ir_type *ir_type_const_char;
  27 static ir_type *ir_type_wchar_t;
  28 static ir_type *ir_type_void;
  29 static ir_type *ir_type_int;
  30
  31 static type_t *type_const_char;
  32 static type_t *type_void;
  33 static type_t *type_int;
  34
  35 static int       next_value_number_function;
  36 static ir_node  *continue_label;
  37 static ir_node  *break_label;
  38 static ir_node  *current_switch_cond;
  39 static bool      saw_default_label;
  40 static ir_node **imature_blocks;
  41
  42 static const declaration_t *current_function_decl;
  43 static ir_node             *current_function_name;
  44
  45 static struct obstack asm_obst;
  46
  47 typedef enum declaration_type_t {
  48         DECLARATION_TYPE_UNKNOWN,
  49         DECLARATION_TYPE_FUNCTION,
  50         DECLARATION_TYPE_GLOBAL_VARIABLE,
  51         DECLARATION_TYPE_LOCAL_VARIABLE,
  52         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  53         DECLARATION_TYPE_COMPOUND_MEMBER,
  54         DECLARATION_TYPE_LABEL_BLOCK,
  55         DECLARATION_TYPE_ENUM_ENTRY
  56 } declaration_type_t;
  57
  58 static ir_type *get_ir_type(type_t *type);
  59 static int count_decls_in_stmts(const statement_t *stmt);
  60
  61 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  62 {
  63         (void) pos;
  64 #if 0
  65         const declaration_t *declaration = & value_numbers[pos]->declaration;
  66
  67         print_warning_prefix(declaration->source_position);
  68         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  69                         declaration->symbol->string);
  70 #endif
  71         fprintf(stderr, "Some variable might be used uninitialized\n");
  72         return new_r_Unknown(irg, mode);
  73 }
  74
  75 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  76 {
  77         const source_position_t *pos = (const source_position_t*) dbg;
  78         if(pos == NULL)
  79                 return 0;
  80         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  81                                    pos->linenr);
  82 }
  83
  84 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
  85 {
  86         const source_position_t *pos = (const source_position_t*) dbg;
  87         if(pos == NULL)
  88                 return NULL;
  89         if(line != NULL)
  90                 *line = pos->linenr;
  91         return pos->input_name;
  92 }
  93
  94 static dbg_info *get_dbg_info(const source_position_t *pos)
  95 {
  96         return (dbg_info*) pos;
  97 }
  98
  99 static unsigned unique_id = 0;
 100
 101 static ident *unique_ident(const char *tag)
 102 {
 103         char buf[256];
 104
 105         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 106         unique_id++;
 107         return new_id_from_str(buf);
 108 }
 109
 110 /**
 111  * Return the signed integer mode of size bytes.
 112  *
 113  * @param size   the size
 114  */
 115 static ir_mode *get_smode(unsigned size)
 116 {
 117         static ir_mode *s_modes[16 + 1] = {0, };
 118         ir_mode *res;
 119
 120         if (size <= 0 || size > 16)
 121                 return NULL;
 122
 123         res = s_modes[size];
 124         if (res == NULL) {
 125                 unsigned bits;
 126         char name[32];
 127
 128         bits = size * 8;
 129         snprintf(name, sizeof(name), "i%u", bits);
 130         res = new_ir_mode(name, irms_int_number, bits, 1, irma_twos_complement,
 131                                         bits <= machine_size ? machine_size : bits );
 132
 133                 s_modes[size] = res;
 134         }
 135         return res;
 136 }
 137
 138 /**
 139  * Return the unsigned integer mode of size bytes.
 140  *
 141  * @param size  the size
 142  */
 143 static ir_mode *get_umode(unsigned size)
 144 {
 145         static ir_mode *u_modes[16 + 1] = {0, };
 146         ir_mode *res;
 147
 148         if (size <= 0 || size > 16)
 149                 return NULL;
 150
 151         res = u_modes[size];
 152         if (res == NULL) {
 153                 unsigned bits;
 154                 char name[32];
 155
 156                 bits = size * 8;
 157                 snprintf(name, sizeof(name), "u%u", bits);
 158                 res = new_ir_mode(name, irms_int_number, bits, 0, irma_twos_complement,
 159                                                 bits <= machine_size ? machine_size : bits );
 160
 161                 u_modes[size] = res;
 162         }
 163         return res;
 164 }
 165
 166 /**
 167  * Return the pointer mode of size bytes.
 168  *
 169  * @param size  the size
 170  */
 171 static ir_mode *get_ptrmode(unsigned size, char *name)
 172 {
 173         static ir_mode *p_modes[16 + 1] = {0, };
 174         ir_mode *res;
 175
 176         if (size <= 0 || size > 16)
 177                 return NULL;
 178
 179         res = p_modes[size];
 180         if (res == NULL) {
 181                 unsigned bits;
 182                 char buf[32];
 183
 184                 bits = size * 8;
 185                 if (name == NULL) {
 186                         snprintf(buf, sizeof(buf), "p%u", bits);
 187                         name = buf;
 188                 }
 189                 res = new_ir_mode(name, irms_reference, bits, 0, irma_twos_complement,
 190                                                 bits <= machine_size ? machine_size : bits);
 191
 192                 p_modes[size] = res;
 193
 194                 set_reference_mode_signed_eq(res, get_smode(size));
 195                 set_reference_mode_unsigned_eq(res, get_umode(size));
 196         }
 197         return res;
 198 }
 199
 200 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST];
 201
 202 static ir_mode *mode_int, *mode_uint;
 203
 204 /**
 205  * Initialises the atomic modes depending on the machine size.
 206  */
 207 static void init_atomic_modes(void) {
 208         unsigned int_size   = machine_size < 32 ? 2 : 4;
 209         unsigned long_size  = machine_size < 64 ? 4 : 8;
 210         unsigned llong_size = machine_size < 32 ? 4 : 8;
 211
 212         /* firm has no real void... */
 213         _atomic_modes[ATOMIC_TYPE_VOID]        = mode_T;
 214         _atomic_modes[ATOMIC_TYPE_CHAR]        = char_is_signed ? get_smode(1) : get_umode(1);
 215         _atomic_modes[ATOMIC_TYPE_SCHAR]       = get_smode(1);
 216         _atomic_modes[ATOMIC_TYPE_UCHAR]       = get_umode(1);
 217         _atomic_modes[ATOMIC_TYPE_SHORT]       = get_smode(2);
 218         _atomic_modes[ATOMIC_TYPE_USHORT]      = get_umode(2);
 219         _atomic_modes[ATOMIC_TYPE_INT]         = get_smode(int_size);
 220         _atomic_modes[ATOMIC_TYPE_UINT]        = get_umode(int_size);
 221         _atomic_modes[ATOMIC_TYPE_LONG]        = get_smode(long_size);
 222         _atomic_modes[ATOMIC_TYPE_ULONG]       = get_umode(long_size);
 223         _atomic_modes[ATOMIC_TYPE_LONGLONG]    = get_smode(llong_size);
 224         _atomic_modes[ATOMIC_TYPE_ULONGLONG]   = get_umode(llong_size);
 225         _atomic_modes[ATOMIC_TYPE_FLOAT]       = mode_F;
 226         _atomic_modes[ATOMIC_TYPE_DOUBLE]      = mode_D;
 227         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE] = mode_E;
 228         _atomic_modes[ATOMIC_TYPE_BOOL]        = get_umode(int_size);
 229
 230 #ifdef PROVIDE_COMPLEX
 231         _atomic_modes[ATOMIC_TYPE_BOOL]                  = _atomic_modes[ATOMIC_TYPE_INT];
 232         _atomic_modes[ATOMIC_TYPE_FLOAT_IMAGINARY]       = _atomic_modes[ATOMIC_TYPE_FLOAT];
 233         _atomic_modes[ATOMIC_TYPE_DOUBLE_IMAGINARY]      = _atomic_modes[ATOMIC_TYPE_DOUBLE];
 234         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY] = _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE];
 235 #endif
 236
 237         /* Hmm, pointers should be machine size */
 238         set_modeP_data(get_ptrmode(machine_size >> 3, NULL));
 239         set_modeP_code(get_ptrmode(machine_size >> 3, NULL));
 240
 241         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 242         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 243 }
 244
 245 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 246 {
 247         ir_mode *res = NULL;
 248         if ((unsigned)atomic_type->atype < (unsigned)ATOMIC_TYPE_LAST)
 249                 res = _atomic_modes[(unsigned)atomic_type->atype];
 250         if (res == NULL)
 251                 panic("Encountered unknown atomic type");
 252         return res;
 253 }
 254
 255 static unsigned get_type_size(type_t *type);
 256
 257 static unsigned get_atomic_type_size(const atomic_type_t *type)
 258 {
 259         switch(type->atype) {
 260         case ATOMIC_TYPE_CHAR:
 261         case ATOMIC_TYPE_SCHAR:
 262         case ATOMIC_TYPE_UCHAR:
 263                 return 1;
 264
 265         case ATOMIC_TYPE_SHORT:
 266         case ATOMIC_TYPE_USHORT:
 267                 return 2;
 268
 269         case ATOMIC_TYPE_BOOL:
 270         case ATOMIC_TYPE_INT:
 271         case ATOMIC_TYPE_UINT:
 272                 return machine_size >> 3;
 273
 274         case ATOMIC_TYPE_LONG:
 275         case ATOMIC_TYPE_ULONG:
 276                 return machine_size > 16 ? machine_size >> 3 : 4;
 277
 278         case ATOMIC_TYPE_LONGLONG:
 279         case ATOMIC_TYPE_ULONGLONG:
 280                 return machine_size > 16 ? 8 : 4;
 281
 282         case ATOMIC_TYPE_FLOAT:
 283                 return 4;
 284
 285         case ATOMIC_TYPE_DOUBLE:
 286                 return 8;
 287
 288         case ATOMIC_TYPE_LONG_DOUBLE:
 289                 return 12;
 290
 291         case ATOMIC_TYPE_VOID:
 292                 return 1;
 293
 294         case ATOMIC_TYPE_INVALID:
 295         case ATOMIC_TYPE_LAST:
 296                 break;
 297         }
 298         panic("Trying to determine size of invalid atomic type");
 299 }
 300
 301 static unsigned get_compound_type_size(compound_type_t *type)
 302 {
 303         ir_type *irtype = get_ir_type((type_t*) type);
 304         return get_type_size_bytes(irtype);
 305 }
 306
 307 static unsigned get_array_type_size(array_type_t *type)
 308 {
 309         ir_type *irtype = get_ir_type((type_t*) type);
 310         return get_type_size_bytes(irtype);
 311 }
 312
 313
 314 static unsigned get_type_size(type_t *type)
 315 {
 316         type = skip_typeref(type);
 317
 318         switch(type->kind) {
 319         case TYPE_ATOMIC:
 320                 return get_atomic_type_size(&type->atomic);
 321         case TYPE_ENUM:
 322                 return get_mode_size_bytes(mode_int);
 323         case TYPE_COMPOUND_UNION:
 324         case TYPE_COMPOUND_STRUCT:
 325                 return get_compound_type_size(&type->compound);
 326         case TYPE_FUNCTION:
 327                 /* just a pointer to the function */
 328                 return get_mode_size_bytes(mode_P_code);
 329         case TYPE_POINTER:
 330                 return get_mode_size_bytes(mode_P_data);
 331         case TYPE_ARRAY:
 332                 return get_array_type_size(&type->array);
 333         case TYPE_BUILTIN:
 334                 return get_type_size(type->builtin.real_type);
 335         case TYPE_TYPEDEF:
 336         case TYPE_TYPEOF:
 337         case TYPE_INVALID:
 338                 break;
 339         }
 340         panic("Trying to determine size of invalid type");
 341 }
 342
 343 static unsigned count_parameters(const function_type_t *function_type)
 344 {
 345         unsigned count = 0;
 346
 347         function_parameter_t *parameter = function_type->parameters;
 348         for ( ; parameter != NULL; parameter = parameter->next) {
 349                 ++count;
 350         }
 351
 352         return count;
 353 }
 354
 355
 356
 357
 358 static long fold_constant(const expression_t *expression);
 359
 360 static ir_type *create_atomic_type(const atomic_type_t *type)
 361 {
 362         ir_mode *mode   = get_atomic_mode(type);
 363         ident   *id     = get_mode_ident(mode);
 364         ir_type *irtype = new_type_primitive(id, mode);
 365
 366         if(type->atype == ATOMIC_TYPE_LONG_DOUBLE) {
 367                 set_type_alignment_bytes(irtype, 4);
 368         }
 369
 370         return irtype;
 371 }
 372
 373 static ir_type *create_method_type(const function_type_t *function_type)
 374 {
 375         type_t  *return_type  = function_type->return_type;
 376
 377         ident   *id           = unique_ident("functiontype");
 378         int      n_parameters = count_parameters(function_type);
 379         int      n_results    = return_type == type_void ? 0 : 1;
 380         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 381
 382         if(return_type != type_void) {
 383                 ir_type *restype = get_ir_type(return_type);
 384                 set_method_res_type(irtype, 0, restype);
 385         }
 386
 387         function_parameter_t *parameter = function_type->parameters;
 388         int                   n         = 0;
 389         for( ; parameter != NULL; parameter = parameter->next) {
 390                 ir_type *p_irtype = get_ir_type(parameter->type);
 391                 set_method_param_type(irtype, n, p_irtype);
 392                 ++n;
 393         }
 394
 395         if(function_type->variadic || function_type->unspecified_parameters) {
 396                 set_method_variadicity(irtype, variadicity_variadic);
 397         }
 398
 399         return irtype;
 400 }
 401
 402 static ir_type *create_pointer_type(pointer_type_t *type)
 403 {
 404         type_t  *points_to = type->points_to;
 405         ir_type *ir_points_to;
 406         /* Avoid endless recursion if the points_to type contains this poiner type
 407          * again (might be a struct). We therefore first create a void* pointer
 408          * and then set the real points_to type
 409          */
 410         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 411                                             ir_type_void, mode_P_data);
 412         type->type.firm_type  = ir_type;
 413
 414         ir_points_to = get_ir_type(points_to);
 415         set_pointer_points_to_type(ir_type, ir_points_to);
 416
 417         return ir_type;
 418 }
 419
 420 static ir_type *create_array_type(array_type_t *type)
 421 {
 422         type_t  *element_type    = type->element_type;
 423         ir_type *ir_element_type = get_ir_type(element_type);
 424
 425         ident   *id      = unique_ident("array");
 426         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 427
 428         if(type->size != NULL) {
 429                 int n_elements = fold_constant(type->size);
 430
 431                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 432
 433                 size_t elemsize = get_type_size_bytes(ir_element_type);
 434                 int align = get_type_alignment_bytes(ir_element_type);
 435                 if(elemsize % align > 0) {
 436                         elemsize += align - (elemsize % align);
 437                 }
 438                 set_type_size_bytes(ir_type, n_elements * elemsize);
 439                 set_type_alignment_bytes(ir_type, align);
 440                 set_type_state(ir_type, layout_fixed);
 441         } else {
 442                 set_array_lower_bound_int(ir_type, 0, 0);
 443         }
 444
 445         return ir_type;
 446 }
 447
 448 #define INVALID_TYPE ((ir_type_ptr)-1)
 449
 450 static ir_type *create_struct_type(compound_type_t *type)
 451 {
 452         symbol_t *symbol = type->declaration->symbol;
 453         ident    *id;
 454         if(symbol != NULL) {
 455                 id = unique_ident(symbol->string);
 456         } else {
 457                 id = unique_ident("__anonymous_struct");
 458         }
 459         ir_type *ir_type = new_type_struct(id);
 460
 461         type->type.firm_type = ir_type;
 462
 463         int align_all = 1;
 464         int offset    = 0;
 465         declaration_t *entry = type->declaration->context.declarations;
 466         for( ; entry != NULL; entry = entry->next) {
 467                 if(entry->namespc != NAMESPACE_NORMAL)
 468                         continue;
 469
 470                 ident       *ident         = new_id_from_str(entry->symbol->string);
 471                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 472
 473                 int entry_size      = get_type_size_bytes(entry_ir_type);
 474                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 475                 int misalign        = offset % entry_alignment;
 476                 if (misalign != 0)
 477                         offset += entry_alignment - misalign;
 478
 479                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 480                 ir_entity *const entity = new_d_entity(ir_type, ident, entry_ir_type, dbgi);
 481                 set_entity_offset(entity, offset);
 482                 add_struct_member(ir_type, entity);
 483                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 484                 entry->v.entity         = entity;
 485
 486                 offset += entry_size;
 487                 if(entry_alignment > align_all) {
 488                         if(entry_alignment % align_all != 0) {
 489                                 panic("Uneven alignments not supported yet");
 490                         }
 491                         align_all = entry_alignment;
 492                 }
 493         }
 494
 495         int misalign = offset % align_all;
 496         offset += misalign;
 497         set_type_alignment_bytes(ir_type, align_all);
 498         set_type_size_bytes(ir_type, offset);
 499         set_type_state(ir_type, layout_fixed);
 500
 501         return ir_type;
 502 }
 503
 504 static ir_type *create_union_type(compound_type_t *type)
 505 {
 506         declaration_t *declaration = type->declaration;
 507         symbol_t      *symbol      = declaration->symbol;
 508         ident         *id;
 509         if(symbol != NULL) {
 510                 id = unique_ident(symbol->string);
 511         } else {
 512                 id = unique_ident("__anonymous_union");
 513         }
 514         ir_type  *ir_type = new_type_union(id);
 515
 516         type->type.firm_type = ir_type;
 517
 518         int align_all = 1;
 519         int size      = 0;
 520         declaration_t *entry = declaration->context.declarations;
 521         for( ; entry != NULL; entry = entry->next) {
 522                 if(entry->namespc != NAMESPACE_NORMAL)
 523                         continue;
 524
 525                 ident       *ident         = new_id_from_str(entry->symbol->string);
 526                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 527
 528                 int entry_size      = get_type_size_bytes(entry_ir_type);
 529                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 530
 531                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 532                 ir_entity *const entity = new_d_entity(ir_type, ident, entry_ir_type, dbgi);
 533                 add_union_member(ir_type, entity);
 534                 set_entity_offset(entity, 0);
 535                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 536                 entry->v.entity         = entity;
 537
 538                 if(entry_size > size) {
 539                         size = entry_size;
 540                 }
 541                 if(entry_alignment > align_all) {
 542                         if(entry_alignment % align_all != 0) {
 543                                 panic("Uneven alignments not supported yet");
 544                         }
 545                         align_all = entry_alignment;
 546                 }
 547         }
 548
 549         set_type_alignment_bytes(ir_type, align_all);
 550         set_type_size_bytes(ir_type, size);
 551         set_type_state(ir_type, layout_fixed);
 552
 553         return ir_type;
 554 }
 555
 556 static ir_node *expression_to_firm(const expression_t *expression);
 557 static inline ir_mode *get_ir_mode(type_t *type);
 558
 559 static ir_type *create_enum_type(enum_type_t *const type)
 560 {
 561         type->type.firm_type = ir_type_int;
 562
 563         ir_mode *const mode    = get_ir_mode((type_t*) type);
 564         tarval  *const one     = get_mode_one(mode);
 565         tarval  *      tv_next = get_tarval_null(mode);
 566
 567         declaration_t *declaration = type->declaration->next;
 568         for (; declaration != NULL; declaration = declaration->next) {
 569                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 570                         break;
 571
 572                 declaration->declaration_type = DECLARATION_TYPE_ENUM_ENTRY;
 573
 574                 expression_t *const init = declaration->init.enum_value;
 575                 if (init != NULL) {
 576                         ir_node *const cnst = expression_to_firm(init);
 577                         if (!is_Const(cnst)) {
 578                                 panic("couldn't fold constant");
 579                         }
 580                         tv_next = get_Const_tarval(cnst);
 581                 }
 582                 declaration->v.enum_val = tv_next;
 583                 tv_next = tarval_add(tv_next, one);
 584         }
 585
 586         return ir_type_int;
 587 }
 588
 589 static ir_type *get_ir_type(type_t *type)
 590 {
 591         assert(type != NULL);
 592
 593         type = skip_typeref(type);
 594
 595         if(type->base.firm_type != NULL) {
 596                 assert(type->base.firm_type != INVALID_TYPE);
 597                 return type->base.firm_type;
 598         }
 599
 600         ir_type *firm_type = NULL;
 601         switch(type->kind) {
 602         case TYPE_ATOMIC:
 603                 firm_type = create_atomic_type(&type->atomic);
 604                 break;
 605         case TYPE_FUNCTION:
 606                 firm_type = create_method_type(&type->function);
 607                 break;
 608         case TYPE_POINTER:
 609                 firm_type = create_pointer_type(&type->pointer);
 610                 break;
 611         case TYPE_ARRAY:
 612                 firm_type = create_array_type(&type->array);
 613                 break;
 614         case TYPE_COMPOUND_STRUCT:
 615                 firm_type = create_struct_type(&type->compound);
 616                 break;
 617         case TYPE_COMPOUND_UNION:
 618                 firm_type = create_union_type(&type->compound);
 619                 break;
 620         case TYPE_ENUM:
 621                 firm_type = create_enum_type(&type->enumt);
 622                 break;
 623         case TYPE_BUILTIN:
 624                 firm_type = get_ir_type(type->builtin.real_type);
 625                 break;
 626         case TYPE_TYPEOF:
 627         case TYPE_TYPEDEF:
 628         case TYPE_INVALID:
 629                 break;
 630         }
 631         if(firm_type == NULL)
 632                 panic("unknown type found");
 633
 634         type->base.firm_type = firm_type;
 635         return firm_type;
 636 }
 637
 638 static inline ir_mode *get_ir_mode(type_t *type)
 639 {
 640         ir_type *irtype = get_ir_type(type);
 641
 642         /* firm doesn't report a mode for arrays somehow... */
 643         if(is_Array_type(irtype)) {
 644                 return mode_P_data;
 645         }
 646
 647         ir_mode *mode = get_type_mode(irtype);
 648         assert(mode != NULL);
 649         return mode;
 650 }
 651
 652 static ident *predef_idents[rts_max];
 653
 654 /** Names of the runtime functions. */
 655 static const struct {
 656         int        id;           /**< the rts id */
 657         int        n_res;        /**< number of return values */
 658         const char *name;        /**< the name of the rts function */
 659         int        n_params;     /**< number of parameters */
 660         unsigned   flags;        /**< language flags */
 661 } rts_data[] = {
 662         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 663         { rts_abort,      0, "abort",        0, _C89 },
 664         { rts_abs,        1, "abs",          1, _C89 },
 665         { rts_labs,       1, "labs",         1, _C89 },
 666         { rts_llabs,      1, "llabs",        1, _C99 },
 667         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 668
 669         { rts_fabs,       1, "fabs",         1, _C89 },
 670         { rts_sqrt,       1, "sqrt",         1, _C89 },
 671         { rts_cbrt,       1, "cbrt",         1, _C99 },
 672         { rts_exp,        1, "exp",          1, _C89 },
 673         { rts_exp2,       1, "exp2",         1, _C89 },
 674         { rts_exp10,      1, "exp10",        1, _GNUC },
 675         { rts_log,        1, "log",          1, _C89 },
 676         { rts_log2,       1, "log2",         1, _C89 },
 677         { rts_log10,      1, "log10",        1, _C89 },
 678         { rts_pow,        1, "pow",          2, _C89 },
 679         { rts_sin,        1, "sin",          1, _C89 },
 680         { rts_cos,        1, "cos",          1, _C89 },
 681         { rts_tan,        1, "tan",          1, _C89 },
 682         { rts_asin,       1, "asin",         1, _C89 },
 683         { rts_acos,       1, "acos",         1, _C89 },
 684         { rts_atan,       1, "atan",         1, _C89 },
 685         { rts_sinh,       1, "sinh",         1, _C89 },
 686         { rts_cosh,       1, "cosh",         1, _C89 },
 687         { rts_tanh,       1, "tanh",         1, _C89 },
 688
 689         { rts_fabsf,      1, "fabsf",        1, _C99 },
 690         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 691         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 692         { rts_expf,       1, "expf",         1, _C99 },
 693         { rts_exp2f,      1, "exp2f",        1, _C99 },
 694         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 695         { rts_logf,       1, "logf",         1, _C99 },
 696         { rts_log2f,      1, "log2f",        1, _C99 },
 697         { rts_log10f,     1, "log10f",       1, _C99 },
 698         { rts_powf,       1, "powf",         2, _C99 },
 699         { rts_sinf,       1, "sinf",         1, _C99 },
 700         { rts_cosf,       1, "cosf",         1, _C99 },
 701         { rts_tanf,       1, "tanf",         1, _C99 },
 702         { rts_asinf,      1, "asinf",        1, _C99 },
 703         { rts_acosf,      1, "acosf",        1, _C99 },
 704         { rts_atanf,      1, "atanf",        1, _C99 },
 705         { rts_sinhf,      1, "sinhf",        1, _C99 },
 706         { rts_coshf,      1, "coshf",        1, _C99 },
 707         { rts_tanhf,      1, "tanhf",        1, _C99 },
 708
 709         { rts_fabsl,      1, "fabsl",        1, _C99 },
 710         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 711         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 712         { rts_expl,       1, "expl",         1, _C99 },
 713         { rts_exp2l,      1, "exp2l",        1, _C99 },
 714         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 715         { rts_logl,       1, "logl",         1, _C99 },
 716         { rts_log2l,      1, "log2l",        1, _C99 },
 717         { rts_log10l,     1, "log10l",       1, _C99 },
 718         { rts_powl,       1, "powl",         2, _C99 },
 719         { rts_sinl,       1, "sinl",         1, _C99 },
 720         { rts_cosl,       1, "cosl",         1, _C99 },
 721         { rts_tanl,       1, "tanl",         1, _C99 },
 722         { rts_asinl,      1, "asinl",        1, _C99 },
 723         { rts_acosl,      1, "acosl",        1, _C99 },
 724         { rts_atanl,      1, "atanl",        1, _C99 },
 725         { rts_sinhl,      1, "sinhl",        1, _C99 },
 726         { rts_coshl,      1, "coshl",        1, _C99 },
 727         { rts_tanhl,      1, "tanhl",        1, _C99 },
 728
 729         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 730         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 731         { rts_strcmp,     1, "strcmp",       2, _C89 },
 732         { rts_strncmp,    1, "strncmp",      3, _C89 }
 733 };
 734
 735 static ir_entity* get_function_entity(declaration_t *declaration)
 736 {
 737         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 738                 return declaration->v.entity;
 739         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 740
 741         symbol_t *symbol = declaration->symbol;
 742         ident    *id     = new_id_from_str(symbol->string);
 743
 744         ir_type  *global_type    = get_glob_type();
 745         ir_type  *ir_type_method = get_ir_type(declaration->type);
 746         assert(is_Method_type(ir_type_method));
 747
 748         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 749         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 750         set_entity_ld_ident(entity, id);
 751         if(declaration->storage_class == STORAGE_CLASS_STATIC
 752                         || declaration->is_inline) {
 753                 set_entity_visibility(entity, visibility_local);
 754         } else if(declaration->init.statement != NULL) {
 755                 set_entity_visibility(entity, visibility_external_visible);
 756         } else {
 757                 set_entity_visibility(entity, visibility_external_allocated);
 758
 759                 /* We should check for file scope here, but as long as we compile C only
 760                    this is not needed. */
 761                 int n_params     = get_method_n_params(ir_type_method);
 762                 int n_res        = get_method_n_ress(ir_type_method);
 763                 ir_ident_ptr id  = get_entity_ident(entity);
 764                 int i;
 765
 766                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
 767                         /* found abort(), store for later */
 768                         //abort_ent = ent;
 769                         //abort_tp  = ftype;
 770                 } else {
 771                         if (! firm_opt.freestanding) {
 772                                 /* check for a known runtime function */
 773                                 for (i = 0; i < rts_max; ++i) {
 774                                         /* ignore those rts functions not necessary needed for current mode */
 775                                         if ((c_mode & rts_data[i].flags) == 0)
 776                                                 continue;
 777                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
 778                                                 id == predef_idents[rts_data[i].id])
 779                                                 rts_entities[rts_data[i].id] = entity;
 780                                 }
 781                         }
 782                 }
 783         }
 784         set_entity_allocation(entity, allocation_static);
 785
 786         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 787         declaration->v.entity         = entity;
 788
 789         return entity;
 790 }
 791
 792 static ir_node *const_to_firm(const const_expression_t *cnst)
 793 {
 794         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 795         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 796
 797         char    buf[128];
 798         tarval *tv;
 799         size_t  len;
 800         if(mode_is_float(mode)) {
 801                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 802         } else {
 803                 if(mode_is_signed(mode)) {
 804                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 805                 } else {
 806                         len = snprintf(buf, sizeof(buf), "%llu",
 807                                        (unsigned long long) cnst->v.int_value);
 808                 }
 809                 tv = new_tarval_from_str(buf, len, mode);
 810         }
 811
 812         return new_d_Const(dbgi, mode, tv);
 813 }
 814
 815 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 816 {
 817         assert(entity != NULL);
 818         union symconst_symbol sym;
 819         sym.entity_p = entity;
 820         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 821 }
 822
 823 static ir_node *string_to_firm(const source_position_t *const src_pos,
 824                                const char *const id_prefix,
 825                                const char *const string)
 826 {
 827         ir_type *const global_type = get_glob_type();
 828         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 829                                                     ir_type_const_char);
 830
 831         ident     *const id     = unique_ident(id_prefix);
 832         dbg_info  *const dbgi   = get_dbg_info(src_pos);
 833         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
 834         set_entity_ld_ident(entity, id);
 835         set_entity_variability(entity, variability_constant);
 836         set_entity_allocation(entity, allocation_static);
 837
 838         ir_type *const elem_type = ir_type_const_char;
 839         ir_mode *const mode      = get_type_mode(elem_type);
 840
 841         const size_t slen = strlen(string) + 1;
 842
 843         set_array_lower_bound_int(type, 0, 0);
 844         set_array_upper_bound_int(type, 0, slen);
 845         set_type_size_bytes(type, slen);
 846         set_type_state(type, layout_fixed);
 847
 848         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 849         for(size_t i = 0; i < slen; ++i) {
 850                 tvs[i] = new_tarval_from_long(string[i], mode);
 851         }
 852
 853         set_array_entity_values(entity, tvs, slen);
 854         free(tvs);
 855
 856         return create_symconst(dbgi, entity);
 857 }
 858
 859 static ir_node *string_literal_to_firm(
 860                 const string_literal_expression_t* literal)
 861 {
 862         return string_to_firm(&literal->expression.source_position, "Lstr",
 863                               literal->value);
 864 }
 865
 866 static ir_node *wide_string_literal_to_firm(
 867         const wide_string_literal_expression_t* const literal)
 868 {
 869         ir_type *const global_type = get_glob_type();
 870         ir_type *const elem_type   = ir_type_wchar_t;
 871         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 872                                                     elem_type);
 873
 874         ident     *const id     = unique_ident("Lstr");
 875         dbg_info  *const dbgi   = get_dbg_info(&literal->expression.source_position);
 876         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
 877         set_entity_ld_ident(entity, id);
 878         set_entity_variability(entity, variability_constant);
 879         set_entity_allocation(entity, allocation_static);
 880
 881         ir_mode *const mode      = get_type_mode(elem_type);
 882
 883         const wchar_rep_t *const string = literal->value.begin;
 884         const size_t             slen   = literal->value.size;
 885
 886         set_array_lower_bound_int(type, 0, 0);
 887         set_array_upper_bound_int(type, 0, slen);
 888         set_type_size_bytes(type, slen);
 889         set_type_state(type, layout_fixed);
 890
 891         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 892         for(size_t i = 0; i < slen; ++i) {
 893                 tvs[i] = new_tarval_from_long(string[i], mode);
 894         }
 895
 896         set_array_entity_values(entity, tvs, slen);
 897         free(tvs);
 898
 899         return create_symconst(dbgi, entity);
 900 }
 901
 902 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
 903                               dbg_info *const dbgi)
 904 {
 905         if(is_compound_type(irtype) || is_Array_type(irtype)) {
 906                 return addr;
 907         }
 908
 909         ir_mode *const mode     = get_type_mode(irtype);
 910         ir_node *const memory   = get_store();
 911         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 912         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 913         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 914         set_store(load_mem);
 915         return load_res;
 916 }
 917
 918 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
 919 {
 920         ir_mode *mode = get_irn_mode(node);
 921
 922         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
 923                 return node;
 924         if(!mode_is_float(mode))
 925                 return node;
 926
 927         /* check if there is already a Conv */
 928         if (get_irn_op(node) == op_Conv) {
 929                 /* convert it into a strict Conv */
 930                 set_Conv_strict(node, 1);
 931                 return node;
 932         }
 933
 934         /* otherwise create a new one */
 935         return new_d_strictConv(dbgi, node, mode);
 936 }
 937
 938 static ir_node *get_global_var_address(dbg_info *const dbgi,
 939                                        const declaration_t *const decl)
 940 {
 941         assert(decl->declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
 942
 943         ir_entity *const entity = decl->v.entity;
 944         switch ((storage_class_tag_t)decl->storage_class) {
 945                 case STORAGE_CLASS_THREAD:
 946                 case STORAGE_CLASS_THREAD_EXTERN:
 947                 case STORAGE_CLASS_THREAD_STATIC: {
 948                         ir_node *const no_mem = new_NoMem();
 949                         ir_node *const tls    = get_irg_tls(current_ir_graph);
 950                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
 951                 }
 952
 953                 default:
 954                         return create_symconst(dbgi, entity);
 955         }
 956 }
 957
 958 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 959 {
 960         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 961         declaration_t *declaration = ref->declaration;
 962         type_t        *type        = skip_typeref(declaration->type);
 963
 964         switch((declaration_type_t) declaration->declaration_type) {
 965         case DECLARATION_TYPE_UNKNOWN:
 966                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
 967                         break;
 968                 }
 969                 get_ir_type(type);
 970                 /* FALLTHROUGH */
 971
 972         case DECLARATION_TYPE_ENUM_ENTRY: {
 973                 ir_mode *const mode = get_ir_mode(type);
 974                 return new_Const(mode, declaration->v.enum_val);
 975         }
 976
 977         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 978                 ir_mode *mode = get_ir_mode(type);
 979                 return get_value(declaration->v.value_number, mode);
 980         }
 981         case DECLARATION_TYPE_FUNCTION: {
 982                 return create_symconst(dbgi, declaration->v.entity);
 983         }
 984         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 985                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
 986                 ir_type *const irtype = get_entity_type(declaration->v.entity);
 987                 return deref_address(irtype, addr, dbgi);
 988         }
 989
 990         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 991                 ir_entity *entity = declaration->v.entity;
 992                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 993                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 994                 ir_type   *irtype = get_entity_type(entity);
 995                 return deref_address(irtype, sel, dbgi);
 996         }
 997
 998         case DECLARATION_TYPE_COMPOUND_MEMBER:
 999         case DECLARATION_TYPE_LABEL_BLOCK:
1000                 panic("not implemented reference type");
1001         }
1002
1003         panic("reference to declaration with unknown type found");
1004 }
1005
1006 static ir_node *reference_addr(const reference_expression_t *ref)
1007 {
1008         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
1009         declaration_t *declaration = ref->declaration;
1010
1011         switch((declaration_type_t) declaration->declaration_type) {
1012         case DECLARATION_TYPE_UNKNOWN:
1013                 break;
1014         case DECLARATION_TYPE_LOCAL_VARIABLE:
1015                 panic("local variable without entity has no address");
1016         case DECLARATION_TYPE_FUNCTION: {
1017                 return create_symconst(dbgi, declaration->v.entity);
1018         }
1019         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
1020                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1021                 return addr;
1022         }
1023         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
1024                 ir_entity *entity = declaration->v.entity;
1025                 ir_node   *frame  = get_irg_frame(current_ir_graph);
1026                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1027
1028                 return sel;
1029         }
1030
1031         case DECLARATION_TYPE_ENUM_ENTRY:
1032                 panic("trying to reference enum entry");
1033
1034         case DECLARATION_TYPE_COMPOUND_MEMBER:
1035         case DECLARATION_TYPE_LABEL_BLOCK:
1036                 panic("not implemented reference type");
1037         }
1038
1039         panic("reference to declaration with unknown type found");
1040 }
1041
1042 static ir_node *process_builtin_call(const call_expression_t *call)
1043 {
1044         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
1045
1046         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1047         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1048
1049         type_t *type = skip_typeref(builtin->expression.datatype);
1050         assert(is_type_pointer(type));
1051
1052         type_t   *function_type = skip_typeref(type->pointer.points_to);
1053         symbol_t *symbol        = builtin->symbol;
1054
1055         switch(symbol->ID) {
1056         case T___builtin_alloca: {
1057                 if(call->arguments == NULL || call->arguments->next != NULL) {
1058                         panic("invalid number of parameters on __builtin_alloca");
1059                 }
1060                 expression_t *argument = call->arguments->expression;
1061                 ir_node      *size     = expression_to_firm(argument);
1062
1063                 ir_node *store  = get_store();
1064                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1065                                               stack_alloc);
1066                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1067                 set_store(proj_m);
1068                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1069
1070                 return res;
1071         }
1072         case T___builtin_nan:
1073         case T___builtin_nanf:
1074         case T___builtin_nand: {
1075                 /* Ignore string for now... */
1076                 assert(is_type_function(function_type));
1077                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1078                 tarval  *tv   = get_mode_NAN(mode);
1079                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1080                 return res;
1081         }
1082         case T___builtin_va_end:
1083                 return NULL;
1084         default:
1085                 panic("Unsupported builtin found\n");
1086         }
1087 }
1088
1089 static ir_node *call_expression_to_firm(const call_expression_t *call)
1090 {
1091         assert(get_cur_block() != NULL);
1092
1093         expression_t *function = call->function;
1094         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1095                 return process_builtin_call(call);
1096         }
1097         ir_node *callee = expression_to_firm(function);
1098
1099         type_t *type = skip_typeref(function->base.datatype);
1100         assert(is_type_pointer(type));
1101         pointer_type_t *pointer_type = &type->pointer;
1102         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1103         assert(is_type_function(points_to));
1104         function_type_t *function_type = &points_to->function;
1105
1106         int              n_parameters = 0;
1107         call_argument_t *argument     = call->arguments;
1108         for( ; argument != NULL; argument = argument->next) {
1109                 ++n_parameters;
1110         }
1111
1112         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
1113
1114         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1115         ir_type *new_method_type = NULL;
1116         if(function_type->variadic || function_type->unspecified_parameters) {
1117                 /* we need to construct a new method type matching the call
1118                  * arguments... */
1119                 int n_res       = get_method_n_ress(ir_method_type);
1120                 new_method_type = new_type_method(unique_ident("calltype"),
1121                                                   n_parameters, n_res);
1122                 set_method_calling_convention(new_method_type,
1123                                get_method_calling_convention(ir_method_type));
1124                 set_method_additional_properties(new_method_type,
1125                                get_method_additional_properties(ir_method_type));
1126
1127                 for(int i = 0; i < n_res; ++i) {
1128                         set_method_res_type(new_method_type, i,
1129                                             get_method_res_type(ir_method_type, i));
1130                 }
1131         }
1132         ir_node *in[n_parameters];
1133
1134         argument = call->arguments;
1135         int n = 0;
1136         for( ; argument != NULL; argument = argument->next) {
1137                 expression_t *expression = argument->expression;
1138                 ir_node      *arg_node   = expression_to_firm(expression);
1139
1140                 arg_node = do_strict_conv(dbgi, arg_node);
1141
1142                 in[n] = arg_node;
1143                 if(new_method_type != NULL) {
1144                         ir_type *irtype = get_ir_type(expression->base.datatype);
1145                         set_method_param_type(new_method_type, n, irtype);
1146                 }
1147
1148                 n++;
1149         }
1150         assert(n == n_parameters);
1151
1152         if(new_method_type != NULL)
1153                 ir_method_type = new_method_type;
1154
1155         ir_node  *store = get_store();
1156         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1157                                      ir_method_type);
1158         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1159         set_store(mem);
1160
1161         type_t  *return_type = skip_typeref(function_type->return_type);
1162         ir_node *result      = NULL;
1163
1164         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1165                 ir_mode *mode;
1166                 if(is_type_scalar(return_type)) {
1167                         mode = get_ir_mode(return_type);
1168                 } else {
1169                         mode = mode_P_data;
1170                 }
1171                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1172                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1173         }
1174
1175         return result;
1176 }
1177
1178 static void statement_to_firm(statement_t *statement);
1179 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1180
1181 static ir_node *expression_to_addr(const expression_t *expression);
1182 static void create_condition_evaluation(const expression_t *expression,
1183                                         ir_node *true_block,
1184                                         ir_node *false_block);
1185
1186 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1187                          ir_node *value)
1188 {
1189         value = do_strict_conv(dbgi, value);
1190
1191         ir_node  *memory = get_store();
1192
1193         if(is_type_scalar(type)) {
1194                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1195                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1196                 set_store(store_mem);
1197         } else {
1198                 ir_type *irtype    = get_ir_type(type);
1199                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1200                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1201                 set_store(copyb_mem);
1202         }
1203 }
1204
1205 static void set_value_for_expression(const expression_t *expression,
1206                                      ir_node *value)
1207 {
1208         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1209         value          = do_strict_conv(dbgi, value);
1210
1211         if(expression->kind == EXPR_REFERENCE) {
1212                 const reference_expression_t *ref = &expression->reference;
1213
1214                 declaration_t *declaration = ref->declaration;
1215                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
1216                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1217                         set_value(declaration->v.value_number, value);
1218                         return;
1219                 }
1220         }
1221
1222         ir_node *addr = expression_to_addr(expression);
1223         type_t  *type = skip_typeref(expression->base.datatype);
1224         assign_value(dbgi, addr, type, value);
1225 }
1226
1227 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1228 {
1229         ir_mode *value_mode = get_irn_mode(value);
1230
1231         if (value_mode == dest_mode || is_Bad(value))
1232                 return value;
1233
1234         if(dest_mode == mode_b) {
1235                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1236                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1237                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1238                 return proj;
1239         }
1240
1241         return new_d_Conv(dbgi, value, dest_mode);
1242 }
1243
1244 static ir_node *create_incdec(const unary_expression_t *expression)
1245 {
1246         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
1247         type_t       *type  = skip_typeref(expression->expression.datatype);
1248         ir_mode      *mode  = get_ir_mode(type);
1249         expression_t *value = expression->value;
1250
1251         ir_node *value_node = expression_to_firm(value);
1252
1253         ir_node *offset;
1254         if(is_type_pointer(type)) {
1255                 pointer_type_t *pointer_type = &type->pointer;
1256                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1257                 offset = new_Const_long(mode_int, elem_size);
1258         } else {
1259                 assert(is_type_arithmetic(type));
1260                 offset = new_Const(mode, get_mode_one(mode));
1261         }
1262
1263         switch(expression->expression.kind) {
1264         case EXPR_UNARY_POSTFIX_INCREMENT: {
1265                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1266                 set_value_for_expression(value, new_value);
1267                 return value_node;
1268         }
1269         case EXPR_UNARY_POSTFIX_DECREMENT: {
1270                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1271                 set_value_for_expression(value, new_value);
1272                 return value_node;
1273         }
1274         case EXPR_UNARY_PREFIX_INCREMENT: {
1275                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1276                 set_value_for_expression(value, new_value);
1277                 return new_value;
1278         }
1279         case EXPR_UNARY_PREFIX_DECREMENT: {
1280                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1281                 set_value_for_expression(value, new_value);
1282                 return new_value;
1283         }
1284         default:
1285                 panic("no incdec expr in create_incdec");
1286                 return NULL;
1287         }
1288 }
1289
1290 static bool is_local_variable(expression_t *expression)
1291 {
1292         if (expression->kind != EXPR_REFERENCE)
1293                 return false;
1294         reference_expression_t *ref_expr    = &expression->reference;
1295         declaration_t          *declaration = ref_expr->declaration;
1296         return declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE;
1297 }
1298
1299 static pn_Cmp get_pnc(const expression_kind_t kind)
1300 {
1301         switch(kind) {
1302         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1303         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1304         case EXPR_BINARY_NOTEQUAL:      return pn_Cmp_Ne;
1305         case EXPR_BINARY_ISLESS:
1306         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1307         case EXPR_BINARY_ISLESSEQUAL:
1308         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1309         case EXPR_BINARY_ISGREATER:
1310         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1311         case EXPR_BINARY_ISGREATEREQUAL:
1312         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1313         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1314
1315         default:
1316                 break;
1317         }
1318         panic("trying to get pn_Cmp from non-comparison binexpr type");
1319 }
1320
1321 /**
1322  * Handle the assume optimizer hint: check if a Confirm
1323  * node can be created.
1324  *
1325  * @param dbi    debug info
1326  * @param expr   the IL assume expression
1327  *
1328  * we support here only some simple cases:
1329  *  - var rel const
1330  *  - const rel val
1331  *  - var rel var
1332  */
1333 static ir_node *handle_assume_compare(dbg_info *dbi, const binary_expression_t *expression)
1334 {
1335         expression_t  *op1 = expression->left;
1336         expression_t  *op2 = expression->right;
1337         expression_t  *con;
1338         declaration_t *var2, *var = NULL;
1339         ir_node       *res = NULL;
1340         pn_Cmp         cmp_val;
1341
1342         cmp_val = get_pnc(expression->expression.kind);
1343
1344         if (is_local_variable(op1) && is_local_variable(op2)) {
1345         var  = op1->reference.declaration;
1346             var2 = op2->reference.declaration;
1347
1348                 type_t  *type       = skip_typeref(var->type);
1349                 ir_mode *const mode = get_ir_mode(type);
1350
1351                 ir_node *irn1       = get_value(var->v.value_number, mode);
1352                 ir_node *irn2       = get_value(var2->v.value_number, mode);
1353
1354                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1355                 set_value(var2->v.value_number, res);
1356
1357                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1358                 set_value(var->v.value_number, res);
1359
1360                 return res;
1361         }
1362
1363         if (is_local_variable(op1) && is_constant_expression(op2)) {
1364                 var = op1->reference.declaration;
1365                 con = op2;
1366         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1367                 cmp_val = get_inversed_pnc(cmp_val);
1368                 var = op2->reference.declaration;
1369                 con = op1;
1370         }
1371
1372         if (var != NULL) {
1373                 type_t  *type       = skip_typeref(var->type);
1374                 ir_mode *const mode = get_ir_mode(type);
1375
1376                 res = get_value(var->v.value_number, mode);
1377                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1378                 set_value(var->v.value_number, res);
1379         }
1380         return res;
1381 }
1382
1383 /**
1384  * Handle the assume optimizer hint.
1385  *
1386  * @param dbi    debug info
1387  * @param expr   the IL assume expression
1388  */
1389 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1390         switch(expression->kind) {
1391         case EXPR_BINARY_EQUAL:
1392         case EXPR_BINARY_NOTEQUAL:
1393         case EXPR_BINARY_LESS:
1394         case EXPR_BINARY_LESSEQUAL:
1395         case EXPR_BINARY_GREATER:
1396         case EXPR_BINARY_GREATEREQUAL:
1397                 return handle_assume_compare(dbi, &expression->binary);
1398         default:
1399                 return NULL;
1400         }
1401 }
1402
1403 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1404 {
1405         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1406         type_t   *type = skip_typeref(expression->expression.datatype);
1407
1408         if(expression->expression.kind == EXPR_UNARY_TAKE_ADDRESS)
1409                 return expression_to_addr(expression->value);
1410
1411         const expression_t *value = expression->value;
1412
1413         switch(expression->expression.kind) {
1414         case EXPR_UNARY_NEGATE: {
1415                 ir_node *value_node = expression_to_firm(value);
1416                 ir_mode *mode = get_ir_mode(type);
1417                 return new_d_Minus(dbgi, value_node, mode);
1418         }
1419         case EXPR_UNARY_PLUS:
1420                 return expression_to_firm(value);
1421         case EXPR_UNARY_BITWISE_NEGATE: {
1422                 ir_node *value_node = expression_to_firm(value);
1423                 ir_mode *mode = get_ir_mode(type);
1424                 return new_d_Not(dbgi, value_node, mode);
1425         }
1426         case EXPR_UNARY_NOT: {
1427                 ir_node *value_node = expression_to_firm(value);
1428                 ir_mode *mode = get_ir_mode(type);
1429                 if(get_irn_mode(value_node) != mode_b) {
1430                         value_node = create_conv(dbgi, value_node, mode_b);
1431                 }
1432                 value_node = new_d_Not(dbgi, value_node, mode_b);
1433                 if(mode != mode_b) {
1434                         value_node = create_conv(dbgi, value_node, mode);
1435                 }
1436                 return value_node;
1437         }
1438         case EXPR_UNARY_DEREFERENCE: {
1439                 ir_node *value_node = expression_to_firm(value);
1440                 type_t  *value_type = skip_typeref(value->base.datatype);
1441                 ir_type *irtype     = get_ir_type(value_type);
1442                 assert(is_Pointer_type(irtype));
1443                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1444                 return deref_address(points_to, value_node, dbgi);
1445         }
1446         case EXPR_UNARY_POSTFIX_INCREMENT:
1447         case EXPR_UNARY_POSTFIX_DECREMENT:
1448         case EXPR_UNARY_PREFIX_INCREMENT:
1449         case EXPR_UNARY_PREFIX_DECREMENT:
1450                 return create_incdec(expression);
1451         case EXPR_UNARY_CAST: {
1452                 ir_node *value_node = expression_to_firm(value);
1453                 ir_mode *mode = get_ir_mode(type);
1454                 ir_node *node = create_conv(dbgi, value_node, mode);
1455                 node = do_strict_conv(dbgi, node);
1456                 return node;
1457         }
1458         case EXPR_UNARY_CAST_IMPLICIT: {
1459                 ir_node *value_node = expression_to_firm(value);
1460                 ir_mode *mode = get_ir_mode(type);
1461                 return create_conv(dbgi, value_node, mode);
1462         }
1463         case EXPR_UNARY_ASSUME:
1464                 if(firm_opt.confirm)
1465                         return handle_assume(dbgi, value);
1466                 else
1467                         return NULL;
1468
1469         default:
1470                 break;
1471         }
1472         panic("invalid UNEXPR type found");
1473 }
1474
1475 static ir_node *create_lazy_op(const binary_expression_t *expression)
1476 {
1477         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1478         type_t   *type = expression->expression.datatype;
1479         ir_mode  *mode = get_ir_mode(type);
1480
1481         if(is_constant_expression(expression->left)) {
1482                 long val = fold_constant(expression->left);
1483                 expression_kind_t ekind = expression->expression.kind;
1484                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1485                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1486                         return expression_to_firm(expression->right);
1487                 } else {
1488                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1489                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1490                         return new_Const(mode, get_mode_one(mode));
1491                 }
1492         }
1493
1494         ir_node *cur_block = get_cur_block();
1495
1496         ir_node *one_block = new_immBlock();
1497         ir_node *one       = new_Const(mode, get_mode_one(mode));
1498         ir_node *jmp_one   = new_d_Jmp(dbgi);
1499
1500         ir_node *zero_block = new_immBlock();
1501         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1502         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1503
1504         set_cur_block(cur_block);
1505         create_condition_evaluation((const expression_t*) expression,
1506                                     one_block, zero_block);
1507         mature_immBlock(one_block);
1508         mature_immBlock(zero_block);
1509
1510         ir_node *common_block = new_immBlock();
1511         add_immBlock_pred(common_block, jmp_one);
1512         add_immBlock_pred(common_block, jmp_zero);
1513         mature_immBlock(common_block);
1514
1515         ir_node *in[2] = { one, zero };
1516         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1517
1518         return val;
1519 }
1520
1521 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1522                                             ir_node *right, ir_mode *mode);
1523
1524 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1525                                         create_arithmetic_func func)
1526 {
1527         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1528         ir_node  *left  = expression_to_firm(expression->left);
1529         ir_node  *right = expression_to_firm(expression->right);
1530         type_t   *type  = expression->right->base.datatype;
1531         /* be careful with the modes, because in arithmetic assign nodes only
1532          * the right operand has the mode of the arithmetic already */
1533         ir_mode  *mode  = get_ir_mode(type);
1534         left            = create_conv(dbgi, left, mode);
1535         ir_node  *res   = func(dbgi, left, right, mode);
1536
1537         return res;
1538 }
1539
1540 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1541                                    ir_node  *      integer,
1542                                    type_t   *const type,
1543                                    dbg_info *const dbgi,
1544                                    const create_arithmetic_func func)
1545 {
1546         pointer_type_t *const pointer_type = &type->pointer;
1547         type_t         *const points_to    = pointer_type->points_to;
1548         const unsigned        elem_size    = get_type_size(points_to);
1549
1550         assert(elem_size >= 1);
1551         if (elem_size > 1) {
1552                 integer             = create_conv(dbgi, integer, mode_int);
1553                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1554                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
1555                 integer = mul;
1556         }
1557
1558         ir_mode *const mode = get_ir_mode(type);
1559         return func(dbgi, pointer, integer, mode);
1560 }
1561
1562 static ir_node *create_arithmetic_assign_binop(
1563                 const binary_expression_t *expression, create_arithmetic_func func)
1564 {
1565         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1566         type_t   *const type = skip_typeref(expression->expression.datatype);
1567         ir_node  *value;
1568
1569         if (is_type_pointer(type)) {
1570                 ir_node        *const pointer = expression_to_firm(expression->left);
1571                 ir_node        *      integer = expression_to_firm(expression->right);
1572                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1573         } else {
1574                 value = create_arithmetic_binop(expression, func);
1575         }
1576
1577         ir_mode  *const mode = get_ir_mode(type);
1578         value = create_conv(dbgi, value, mode);
1579         set_value_for_expression(expression->left, value);
1580
1581         return value;
1582 }
1583
1584 static ir_node *create_add(const binary_expression_t *expression)
1585 {
1586         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1587         ir_node  *left  = expression_to_firm(expression->left);
1588         ir_node  *right = expression_to_firm(expression->right);
1589         type_t   *type  = expression->expression.datatype;
1590
1591         expression_t *expr_left  = expression->left;
1592         expression_t *expr_right = expression->right;
1593         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1594         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1595
1596         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1597                 ir_mode *const mode = get_ir_mode(type);
1598                 return new_d_Add(dbgi, left, right, mode);
1599         }
1600
1601         if (is_type_pointer(type_left)) {
1602                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1603         } else {
1604                 assert(is_type_pointer(type_right));
1605                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1606         }
1607 }
1608
1609 static ir_node *create_sub(const binary_expression_t *expression)
1610 {
1611         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1612         expression_t *const expr_left  = expression->left;
1613         expression_t *const expr_right = expression->right;
1614         ir_node      *const left       = expression_to_firm(expr_left);
1615         ir_node      *const right      = expression_to_firm(expr_right);
1616         type_t       *const type       = expression->expression.datatype;
1617         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1618         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1619
1620         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1621                 ir_mode *const mode = get_ir_mode(type);
1622                 return new_d_Sub(dbgi, left, right, mode);
1623         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
1624                 const pointer_type_t *const ptr_type = &type_left->pointer;
1625                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1626                 ir_mode *const mode   = get_ir_mode(type);
1627                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1628                 ir_node *const cnst   = new_Const_long(mode_int, (long)elem_size);
1629                 ir_node *const no_mem = new_NoMem();
1630                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1631                                                   op_pin_state_floats);
1632                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1633         }
1634
1635         assert(is_type_pointer(type_left));
1636         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1637 }
1638
1639 static ir_node *create_shift(const binary_expression_t *expression)
1640 {
1641         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1642         ir_node  *left  = expression_to_firm(expression->left);
1643         ir_node  *right = expression_to_firm(expression->right);
1644         type_t   *type  = expression->expression.datatype;
1645         ir_mode  *mode  = get_ir_mode(type);
1646
1647         /* firm always wants the shift count to be unsigned */
1648         right = create_conv(dbgi, right, mode_uint);
1649
1650         ir_node *res;
1651
1652         switch(expression->expression.kind) {
1653         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1654         case EXPR_BINARY_SHIFTLEFT:
1655                 res = new_d_Shl(dbgi, left, right, mode);
1656                 break;
1657         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1658         case EXPR_BINARY_SHIFTRIGHT: {
1659                  expression_t *expr_left = expression->left;
1660                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1661
1662                  if(is_type_signed(type_left)) {
1663                         res = new_d_Shrs(dbgi, left, right, mode);
1664                  } else {
1665                          res = new_d_Shr(dbgi, left, right, mode);
1666                  }
1667                  break;
1668         }
1669         default:
1670                 panic("create shift op called for non-shift op");
1671         }
1672
1673         return res;
1674 }
1675
1676
1677 static ir_node *create_divmod(const binary_expression_t *expression)
1678 {
1679         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1680         ir_node  *left  = expression_to_firm(expression->left);
1681         ir_node  *right = expression_to_firm(expression->right);
1682         ir_node  *pin   = new_Pin(new_NoMem());
1683         /* be careful with the modes, because in arithmetic assign nodes only
1684          * the right operand has the mode of the arithmetic already */
1685         type_t   *type  = expression->right->base.datatype;
1686         ir_mode  *mode  = get_ir_mode(type);
1687         left            = create_conv(dbgi, left, mode);
1688         ir_node  *op;
1689         ir_node  *res;
1690
1691         switch (expression->expression.kind) {
1692         case EXPR_BINARY_DIV:
1693         case EXPR_BINARY_DIV_ASSIGN:
1694                 if(mode_is_float(mode)) {
1695                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1696                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1697                 } else {
1698                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1699                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1700                 }
1701                 break;
1702
1703         case EXPR_BINARY_MOD:
1704         case EXPR_BINARY_MOD_ASSIGN:
1705                 assert(!mode_is_float(mode));
1706                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1707                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1708                 break;
1709
1710         default: panic("unexpected binary expression type in create_divmod()");
1711         }
1712
1713         return res;
1714 }
1715
1716 static ir_node *create_arithmetic_assign_divmod(
1717                 const binary_expression_t *expression)
1718 {
1719         ir_node  *      value = create_divmod(expression);
1720         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1721         type_t   *const type  = expression->expression.datatype;
1722         ir_mode  *const mode  = get_ir_mode(type);
1723
1724         assert(type->kind != TYPE_POINTER);
1725
1726         value = create_conv(dbgi, value, mode);
1727         set_value_for_expression(expression->left, value);
1728
1729         return value;
1730 }
1731
1732 static ir_node *create_arithmetic_assign_shift(
1733                 const binary_expression_t *expression)
1734 {
1735         ir_node  *      value = create_shift(expression);
1736         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1737         type_t   *const type  = expression->expression.datatype;
1738         ir_mode  *const mode  = get_ir_mode(type);
1739
1740         value = create_conv(dbgi, value, mode);
1741         set_value_for_expression(expression->left, value);
1742
1743         return value;
1744 }
1745
1746 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1747 {
1748         expression_kind_t kind = expression->expression.kind;
1749
1750         switch(kind) {
1751         case EXPR_BINARY_EQUAL:
1752         case EXPR_BINARY_NOTEQUAL:
1753         case EXPR_BINARY_LESS:
1754         case EXPR_BINARY_LESSEQUAL:
1755         case EXPR_BINARY_GREATER:
1756         case EXPR_BINARY_GREATEREQUAL:
1757         case EXPR_BINARY_ISGREATER:
1758         case EXPR_BINARY_ISGREATEREQUAL:
1759         case EXPR_BINARY_ISLESS:
1760         case EXPR_BINARY_ISLESSEQUAL:
1761         case EXPR_BINARY_ISLESSGREATER:
1762         case EXPR_BINARY_ISUNORDERED: {
1763                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1764                 ir_node *left  = expression_to_firm(expression->left);
1765                 ir_node *right = expression_to_firm(expression->right);
1766                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1767                 long     pnc   = get_pnc(kind);
1768                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1769                 return proj;
1770         }
1771         case EXPR_BINARY_ASSIGN: {
1772                 ir_node *right = expression_to_firm(expression->right);
1773                 set_value_for_expression(expression->left, right);
1774
1775                 return right;
1776         }
1777         case EXPR_BINARY_ADD:
1778                 return create_add(expression);
1779         case EXPR_BINARY_SUB:
1780                 return create_sub(expression);
1781         case EXPR_BINARY_MUL:
1782                 return create_arithmetic_binop(expression, new_d_Mul);
1783         case EXPR_BINARY_BITWISE_AND:
1784                 return create_arithmetic_binop(expression, new_d_And);
1785         case EXPR_BINARY_BITWISE_OR:
1786                 return create_arithmetic_binop(expression, new_d_Or);
1787         case EXPR_BINARY_BITWISE_XOR:
1788                 return create_arithmetic_binop(expression, new_d_Eor);
1789         case EXPR_BINARY_SHIFTLEFT:
1790         case EXPR_BINARY_SHIFTRIGHT:
1791                 return create_shift(expression);
1792         case EXPR_BINARY_DIV:
1793         case EXPR_BINARY_MOD:
1794                 return create_divmod(expression);
1795         case EXPR_BINARY_LOGICAL_AND:
1796         case EXPR_BINARY_LOGICAL_OR:
1797                 return create_lazy_op(expression);
1798         case EXPR_BINARY_COMMA:
1799                 expression_to_firm(expression->left);
1800                 return expression_to_firm(expression->right);
1801         case EXPR_BINARY_ADD_ASSIGN:
1802                 return create_arithmetic_assign_binop(expression, new_d_Add);
1803         case EXPR_BINARY_SUB_ASSIGN:
1804                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1805         case EXPR_BINARY_MUL_ASSIGN:
1806                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1807         case EXPR_BINARY_DIV_ASSIGN:
1808                 return create_arithmetic_assign_divmod(expression);
1809         case EXPR_BINARY_BITWISE_AND_ASSIGN:
1810                 return create_arithmetic_assign_binop(expression, new_d_And);
1811         case EXPR_BINARY_BITWISE_OR_ASSIGN:
1812                 return create_arithmetic_assign_binop(expression, new_d_Or);
1813         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1814                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1815         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1816         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1817                 return create_arithmetic_assign_shift(expression);
1818         case EXPR_BINARY_BUILTIN_EXPECT:
1819                 return expression_to_firm(expression->left);
1820         default:
1821                 panic("TODO binexpr type");
1822         }
1823 }
1824
1825 static ir_node *array_access_addr(const array_access_expression_t *expression)
1826 {
1827         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1828         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1829         ir_node  *offset    = expression_to_firm(expression->index);
1830         offset              = create_conv(dbgi, offset, mode_uint);
1831
1832         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1833         assert(is_type_pointer(ref_type));
1834         pointer_type_t *pointer_type = &ref_type->pointer;
1835
1836         unsigned elem_size       = get_type_size(pointer_type->points_to);
1837         ir_node *elem_size_const = new_Const_long(mode_uint, elem_size);
1838         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1839                                              mode_uint);
1840         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
1841
1842         return result;
1843 }
1844
1845 static ir_node *array_access_to_firm(
1846                 const array_access_expression_t *expression)
1847 {
1848         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1849         ir_node  *addr   = array_access_addr(expression);
1850         type_t   *type   = revert_automatic_type_conversion(
1851                         (const expression_t*) expression);
1852         type             = skip_typeref(type);
1853         ir_type  *irtype = get_ir_type(type);
1854
1855         return deref_address(irtype, addr, dbgi);
1856 }
1857
1858 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1859 {
1860         type_t *type = expression->type;
1861         if(type == NULL) {
1862                 type = expression->size_expression->base.datatype;
1863                 assert(type != NULL);
1864         }
1865
1866         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1867         unsigned  size      = get_type_size(type);
1868         ir_node  *size_node = new_Const_long(mode, size);
1869
1870         return size_node;
1871 }
1872
1873 static long fold_constant(const expression_t *expression)
1874 {
1875         assert(is_constant_expression(expression));
1876
1877         ir_graph *old_current_ir_graph = current_ir_graph;
1878         if(current_ir_graph == NULL) {
1879                 current_ir_graph = get_const_code_irg();
1880         }
1881
1882         ir_node *cnst = expression_to_firm(expression);
1883         current_ir_graph = old_current_ir_graph;
1884
1885         if(!is_Const(cnst)) {
1886                 panic("couldn't fold constant\n");
1887         }
1888
1889         tarval *tv = get_Const_tarval(cnst);
1890         if(!tarval_is_long(tv)) {
1891                 panic("result of constant folding is not integer\n");
1892         }
1893
1894         return get_tarval_long(tv);
1895 }
1896
1897 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1898 {
1899         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1900
1901         /* first try to fold a constant condition */
1902         if(is_constant_expression(expression->condition)) {
1903                 long val = fold_constant(expression->condition);
1904                 if(val) {
1905                         return expression_to_firm(expression->true_expression);
1906                 } else {
1907                         return expression_to_firm(expression->false_expression);
1908                 }
1909         }
1910
1911         ir_node *cur_block   = get_cur_block();
1912
1913         /* create the true block */
1914         ir_node *true_block  = new_immBlock();
1915
1916         ir_node *true_val = expression_to_firm(expression->true_expression);
1917         ir_node *true_jmp = new_Jmp();
1918
1919         /* create the false block */
1920         ir_node *false_block = new_immBlock();
1921
1922         ir_node *false_val = expression_to_firm(expression->false_expression);
1923         ir_node *false_jmp = new_Jmp();
1924
1925         /* create the condition evaluation */
1926         set_cur_block(cur_block);
1927         create_condition_evaluation(expression->condition, true_block, false_block);
1928         mature_immBlock(true_block);
1929         mature_immBlock(false_block);
1930
1931         /* create the common block */
1932         ir_node *common_block = new_immBlock();
1933         add_immBlock_pred(common_block, true_jmp);
1934         add_immBlock_pred(common_block, false_jmp);
1935         mature_immBlock(common_block);
1936
1937         /* TODO improve static semantics, so either both or no values are NULL */
1938         if (true_val == NULL || false_val == NULL)
1939                 return NULL;
1940
1941         ir_node *in[2] = { true_val, false_val };
1942         ir_mode *mode  = get_irn_mode(true_val);
1943         assert(get_irn_mode(false_val) == mode);
1944         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1945
1946         return val;
1947 }
1948
1949 static ir_node *select_addr(const select_expression_t *expression)
1950 {
1951         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1952
1953         ir_node *compound_addr = expression_to_firm(expression->compound);
1954
1955         declaration_t *entry = expression->compound_entry;
1956         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1957         ir_entity     *entity = entry->v.entity;
1958
1959         assert(entity != NULL);
1960
1961         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1962
1963         return sel;
1964 }
1965
1966 static ir_node *select_to_firm(const select_expression_t *expression)
1967 {
1968         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1969         ir_node  *addr   = select_addr(expression);
1970         type_t   *type   = revert_automatic_type_conversion(
1971                         (const expression_t*) expression);
1972         type             = skip_typeref(type);
1973         ir_type  *irtype = get_ir_type(type);
1974
1975         return deref_address(irtype, addr, dbgi);
1976 }
1977
1978 /* Values returned by __builtin_classify_type. */
1979 typedef enum gcc_type_class
1980 {
1981         no_type_class = -1,
1982         void_type_class,
1983         integer_type_class,
1984         char_type_class,
1985         enumeral_type_class,
1986         boolean_type_class,
1987         pointer_type_class,
1988         reference_type_class,
1989         offset_type_class,
1990         real_type_class,
1991         complex_type_class,
1992         function_type_class,
1993         method_type_class,
1994         record_type_class,
1995         union_type_class,
1996         array_type_class,
1997         string_type_class,
1998         set_type_class,
1999         file_type_class,
2000         lang_type_class
2001 } gcc_type_class;
2002
2003 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2004 {
2005         const type_t *const type = expr->type_expression->base.datatype;
2006
2007         gcc_type_class tc;
2008         switch (type->kind)
2009         {
2010                 case TYPE_ATOMIC: {
2011                         const atomic_type_t *const atomic_type = &type->atomic;
2012                         switch (atomic_type->atype) {
2013                                 /* should not be reached */
2014                                 case ATOMIC_TYPE_INVALID:
2015                                         tc = no_type_class;
2016                                         break;
2017
2018                                 /* gcc cannot do that */
2019                                 case ATOMIC_TYPE_VOID:
2020                                         tc = void_type_class;
2021                                         break;
2022
2023                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2024                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2025                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2026                                 case ATOMIC_TYPE_SHORT:
2027                                 case ATOMIC_TYPE_USHORT:
2028                                 case ATOMIC_TYPE_INT:
2029                                 case ATOMIC_TYPE_UINT:
2030                                 case ATOMIC_TYPE_LONG:
2031                                 case ATOMIC_TYPE_ULONG:
2032                                 case ATOMIC_TYPE_LONGLONG:
2033                                 case ATOMIC_TYPE_ULONGLONG:
2034                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2035                                         tc = integer_type_class;
2036                                         break;
2037
2038                                 case ATOMIC_TYPE_FLOAT:
2039                                 case ATOMIC_TYPE_DOUBLE:
2040                                 case ATOMIC_TYPE_LONG_DOUBLE:
2041                                         tc = real_type_class;
2042                                         break;
2043
2044 #ifdef PROVIDE_COMPLEX
2045                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
2046                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
2047                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
2048                                         tc = complex_type_class;
2049                                         break;
2050                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
2051                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
2052                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
2053                                         tc = complex_type_class;
2054                                         break;
2055 #endif
2056
2057                                 default:
2058                                         panic("Unimplemented case in classify_type_to_firm().");
2059                         }
2060                         break;
2061                 }
2062
2063                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2064                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2065                 case TYPE_POINTER:         tc = pointer_type_class; break;
2066                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
2067                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
2068
2069                 /* gcc handles this as integer */
2070                 case TYPE_ENUM:            tc = integer_type_class; break;
2071
2072                 default:
2073                         panic("Unimplemented case in classify_type_to_firm().");
2074         }
2075
2076         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
2077         ir_mode  *const mode = mode_int;
2078         tarval   *const tv   = new_tarval_from_long(tc, mode);
2079         return new_d_Const(dbgi, mode, tv);
2080 }
2081
2082 static ir_node *function_name_to_firm(
2083                 const string_literal_expression_t *const expr)
2084 {
2085         if (current_function_name == NULL) {
2086                 const source_position_t *const src_pos =
2087                         &expr->expression.source_position;
2088                 const char *const name = current_function_decl->symbol->string;
2089                 current_function_name = string_to_firm(src_pos, "__func__", name);
2090         }
2091
2092         return current_function_name;
2093 }
2094
2095 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2096 {
2097         statement_t *statement = expr->statement;
2098
2099         assert(statement->kind == STATEMENT_COMPOUND);
2100         return compound_statement_to_firm(&statement->compound);
2101 }
2102
2103 static ir_node *va_start_expression_to_firm(
2104         const va_start_expression_t *const expr)
2105 {
2106         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2107         int        const n           = get_method_n_params(method_type) - 1;
2108         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2109         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2110         dbg_info  *const dbgi        =
2111                 get_dbg_info(&expr->expression.source_position);
2112         ir_node   *const no_mem      = new_NoMem();
2113         ir_node   *const arg_sel     =
2114                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2115
2116         size_t     const parm_size   = get_type_size(expr->parameter->type);
2117         ir_node   *const cnst        = new_Const_long(mode_uint, parm_size);
2118         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2119         set_value_for_expression(expr->ap, add);
2120
2121         return NULL;
2122 }
2123
2124 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2125 {
2126         ir_type  *const irtype = get_ir_type(expr->expression.datatype);
2127         ir_node  *const ap     = expression_to_firm(expr->ap);
2128         dbg_info *const dbgi   = get_dbg_info(&expr->expression.source_position);
2129         ir_node  *const res    = deref_address(irtype, ap, dbgi);
2130
2131         size_t     const parm_size   = get_type_size(expr->expression.datatype);
2132         ir_node   *const cnst        = new_Const_long(mode_uint, parm_size);
2133         ir_node   *const add         = new_d_Add(dbgi, ap, cnst, mode_P_data);
2134         set_value_for_expression(expr->ap, add);
2135
2136         return res;
2137 }
2138
2139 static ir_node *dereference_addr(const unary_expression_t *const expression)
2140 {
2141         assert(expression->expression.kind == EXPR_UNARY_DEREFERENCE);
2142         return expression_to_firm(expression->value);
2143 }
2144
2145 static ir_node *expression_to_addr(const expression_t *expression)
2146 {
2147         switch(expression->kind) {
2148         case EXPR_REFERENCE:
2149                 return reference_addr(&expression->reference);
2150         case EXPR_ARRAY_ACCESS:
2151                 return array_access_addr(&expression->array_access);
2152         case EXPR_SELECT:
2153                 return select_addr(&expression->select);
2154         case EXPR_CALL:
2155                 return call_expression_to_firm(&expression->call);
2156         case EXPR_UNARY_DEREFERENCE: {
2157                 return dereference_addr(&expression->unary);
2158         }
2159         default:
2160                 break;
2161         }
2162         panic("trying to get address of non-lvalue");
2163 }
2164
2165 static ir_node *_expression_to_firm(const expression_t *expression)
2166 {
2167         switch(expression->kind) {
2168         case EXPR_CONST:
2169                 return const_to_firm(&expression->conste);
2170         case EXPR_STRING_LITERAL:
2171                 return string_literal_to_firm(&expression->string);
2172         case EXPR_WIDE_STRING_LITERAL:
2173                 return wide_string_literal_to_firm(&expression->wide_string);
2174         case EXPR_REFERENCE:
2175                 return reference_expression_to_firm(&expression->reference);
2176         case EXPR_CALL:
2177                 return call_expression_to_firm(&expression->call);
2178         EXPR_UNARY_CASES
2179                 return unary_expression_to_firm(&expression->unary);
2180         EXPR_BINARY_CASES
2181                 return binary_expression_to_firm(&expression->binary);
2182         case EXPR_ARRAY_ACCESS:
2183                 return array_access_to_firm(&expression->array_access);
2184         case EXPR_SIZEOF:
2185                 return sizeof_to_firm(&expression->sizeofe);
2186         case EXPR_CONDITIONAL:
2187                 return conditional_to_firm(&expression->conditional);
2188         case EXPR_SELECT:
2189                 return select_to_firm(&expression->select);
2190         case EXPR_CLASSIFY_TYPE:
2191                 return classify_type_to_firm(&expression->classify_type);
2192         case EXPR_FUNCTION:
2193         case EXPR_PRETTY_FUNCTION:
2194                 return function_name_to_firm(&expression->string);
2195         case EXPR_STATEMENT:
2196                 return statement_expression_to_firm(&expression->statement);
2197         case EXPR_VA_START:
2198                 return va_start_expression_to_firm(&expression->va_starte);
2199         case EXPR_VA_ARG:
2200                 return va_arg_expression_to_firm(&expression->va_arge);
2201         case EXPR_OFFSETOF:
2202         case EXPR_BUILTIN_SYMBOL:
2203                 panic("unimplemented expression found");
2204
2205         case EXPR_UNKNOWN:
2206         case EXPR_INVALID:
2207                 break;
2208         }
2209         panic("invalid expression found");
2210 }
2211
2212 static ir_node *expression_to_firm(const expression_t *expression)
2213 {
2214         ir_node *res = _expression_to_firm(expression);
2215
2216         if(res != NULL && get_irn_mode(res) == mode_b) {
2217                 ir_mode *mode = get_ir_mode(expression->base.datatype);
2218                 res           = create_conv(NULL, res, mode);
2219         }
2220
2221         return res;
2222 }
2223
2224 static ir_node *expression_to_modeb(const expression_t *expression)
2225 {
2226         ir_node *res = _expression_to_firm(expression);
2227         res          = create_conv(NULL, res, mode_b);
2228
2229         return res;
2230 }
2231
2232 /**
2233  * create a short-circuit expression evaluation that tries to construct
2234  * efficient control flow structures for &&, || and ! expressions
2235  */
2236 static void create_condition_evaluation(const expression_t *expression,
2237                                         ir_node *true_block,
2238                                         ir_node *false_block)
2239 {
2240         switch(expression->kind) {
2241         case EXPR_UNARY_NOT: {
2242                 const unary_expression_t *unary_expression = &expression->unary;
2243                 create_condition_evaluation(unary_expression->value, false_block,
2244                                             true_block);
2245                 return;
2246         }
2247         case EXPR_BINARY_LOGICAL_AND: {
2248                 const binary_expression_t *binary_expression = &expression->binary;
2249
2250                 ir_node *cur_block   = get_cur_block();
2251                 ir_node *extra_block = new_immBlock();
2252                 set_cur_block(cur_block);
2253                 create_condition_evaluation(binary_expression->left, extra_block,
2254                                             false_block);
2255                 mature_immBlock(extra_block);
2256                 set_cur_block(extra_block);
2257                 create_condition_evaluation(binary_expression->right, true_block,
2258                                             false_block);
2259                 return;
2260         }
2261         case EXPR_BINARY_LOGICAL_OR: {
2262                 const binary_expression_t *binary_expression = &expression->binary;
2263
2264                 ir_node *cur_block   = get_cur_block();
2265                 ir_node *extra_block = new_immBlock();
2266                 set_cur_block(cur_block);
2267                 create_condition_evaluation(binary_expression->left, true_block,
2268                                             extra_block);
2269                 mature_immBlock(extra_block);
2270                 set_cur_block(extra_block);
2271                 create_condition_evaluation(binary_expression->right, true_block,
2272                                             false_block);
2273                 return;
2274         }
2275         default:
2276                 break;
2277         }
2278
2279         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2280         ir_node  *condition  = expression_to_modeb(expression);
2281         ir_node  *cond       = new_d_Cond(dbgi, condition);
2282         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2283         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2284
2285         add_immBlock_pred(true_block, true_proj);
2286         add_immBlock_pred(false_block, false_proj);
2287
2288         set_cur_block(NULL);
2289 }
2290
2291
2292
2293 static void create_declaration_entity(declaration_t *declaration,
2294                                       declaration_type_t declaration_type,
2295                                       ir_type *parent_type)
2296 {
2297         ident     *const id     = new_id_from_str(declaration->symbol->string);
2298         ir_type   *const irtype = get_ir_type(declaration->type);
2299         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2300         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2301         set_entity_ld_ident(entity, id);
2302
2303         declaration->declaration_type = (unsigned char) declaration_type;
2304         declaration->v.entity         = entity;
2305         set_entity_variability(entity, variability_uninitialized);
2306         if(parent_type == get_tls_type())
2307                 set_entity_allocation(entity, allocation_automatic);
2308         else if(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE)
2309                 set_entity_allocation(entity, allocation_static);
2310         /* TODO: visibility? */
2311 }
2312
2313 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2314
2315 enum compound_graph_entry_type_t {
2316         COMPOUND_GRAPH_ENTRY_ARRAY,
2317         COMPOUND_GRAPH_ENTRY_COMPOUND
2318 };
2319
2320 struct compound_graph_path_entry_t {
2321         int type;
2322         union {
2323                 ir_entity *entity;
2324                 int        array_index;
2325         } v;
2326         compound_graph_path_entry_t *prev;
2327 };
2328
2329 static void create_initializer_object(initializer_t *initializer, type_t *type,
2330                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2331
2332 static compound_graph_path *create_compound_path(ir_type *type,
2333                 compound_graph_path_entry_t *entry, int len)
2334 {
2335         compound_graph_path *path = new_compound_graph_path(type, len);
2336
2337         int i = len - 1;
2338         for( ; entry != NULL; entry = entry->prev, --i) {
2339                 assert(i >= 0);
2340                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2341                         set_compound_graph_path_node(path, i, entry->v.entity);
2342                 } else {
2343                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2344                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2345                 }
2346         }
2347         assert(i == -1);
2348
2349         return path;
2350 }
2351
2352 static void create_initializer_value(initializer_value_t *initializer,
2353                                      ir_entity *entity,
2354                                      compound_graph_path_entry_t *entry,
2355                                      int len)
2356 {
2357         ir_node             *node = expression_to_firm(initializer->value);
2358         ir_type             *type = get_entity_type(entity);
2359         compound_graph_path *path = create_compound_path(type, entry, len);
2360         add_compound_ent_value_w_path(entity, node, path);
2361 }
2362
2363 static void create_initializer_compound(initializer_list_t *initializer,
2364                                         compound_type_t *type,
2365                                         ir_entity *entity,
2366                                         compound_graph_path_entry_t *last_entry,
2367                                         int len)
2368 {
2369         declaration_t *compound_declaration = type->declaration;
2370
2371         declaration_t *compound_entry = compound_declaration->context.declarations;
2372
2373         compound_graph_path_entry_t entry;
2374         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2375         entry.prev = last_entry;
2376         ++len;
2377
2378         size_t i = 0;
2379         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2380                 if(compound_entry->symbol == NULL)
2381                         continue;
2382                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2383                         continue;
2384
2385                 if(i >= initializer->len)
2386                         break;
2387
2388                 entry.v.entity = compound_entry->v.entity;
2389
2390                 initializer_t *sub_initializer = initializer->initializers[i];
2391
2392                 assert(compound_entry != NULL);
2393                 assert(compound_entry->declaration_type
2394                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2395
2396                 if(sub_initializer->type == INITIALIZER_VALUE) {
2397                         create_initializer_value(&sub_initializer->value,
2398                                                  entity, &entry, len);
2399                 } else {
2400                         type_t *entry_type = skip_typeref(compound_entry->type);
2401                         create_initializer_object(sub_initializer, entry_type, entity,
2402                                                   &entry, len);
2403                 }
2404
2405                 ++i;
2406         }
2407 }
2408
2409 static void create_initializer_array(initializer_list_t *initializer,
2410                                      array_type_t *type, ir_entity *entity,
2411                                      compound_graph_path_entry_t *last_entry,
2412                                      int len)
2413 {
2414         type_t *element_type = type->element_type;
2415         element_type         = skip_typeref(element_type);
2416
2417         compound_graph_path_entry_t entry;
2418         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2419         entry.prev = last_entry;
2420         ++len;
2421
2422         size_t i;
2423         for(i = 0; i < initializer->len; ++i) {
2424                 entry.v.array_index = i;
2425
2426                 initializer_t *sub_initializer = initializer->initializers[i];
2427
2428                 if(sub_initializer->type == INITIALIZER_VALUE) {
2429                         create_initializer_value(&sub_initializer->value,
2430                                                  entity, &entry, len);
2431                 } else {
2432                         create_initializer_object(sub_initializer, element_type, entity,
2433                                                   &entry, len);
2434                 }
2435         }
2436
2437 #if 0
2438         /* TODO: initialize rest... */
2439         if(type->size_expression != NULL) {
2440                 size_t array_len = fold_constant(type->size_expression);
2441                 for( ; i < array_len; ++i) {
2442
2443                 }
2444         }
2445 #endif
2446 }
2447
2448 static void create_initializer_string(initializer_string_t *initializer,
2449                                       array_type_t *type, ir_entity *entity,
2450                                       compound_graph_path_entry_t *last_entry,
2451                                       int len)
2452 {
2453         type_t *element_type = type->element_type;
2454         element_type         = skip_typeref(element_type);
2455
2456         compound_graph_path_entry_t entry;
2457         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2458         entry.prev = last_entry;
2459         ++len;
2460
2461         ir_type    *irtype  = get_entity_type(entity);
2462         size_t      arr_len = get_array_type_size(type);
2463         const char *p       = initializer->string;
2464         size_t      i       = 0;
2465         for(i = 0; i < arr_len; ++i, ++p) {
2466                 entry.v.array_index = i;
2467
2468                 ir_node             *node = new_Const_long(mode_Bs, *p);
2469                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2470                 add_compound_ent_value_w_path(entity, node, path);
2471
2472                 if(*p == '\0')
2473                         break;
2474         }
2475 }
2476
2477 static void create_initializer_wide_string(
2478         const initializer_wide_string_t *const initializer, array_type_t *const type,
2479         ir_entity *const entity, compound_graph_path_entry_t *const last_entry,
2480         int len)
2481 {
2482         type_t *element_type = type->element_type;
2483         element_type         = skip_typeref(element_type);
2484
2485         compound_graph_path_entry_t entry;
2486         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2487         entry.prev = last_entry;
2488         ++len;
2489
2490         ir_type           *const irtype  = get_entity_type(entity);
2491         const size_t             arr_len = get_array_type_size(type);
2492         const wchar_rep_t *      p       = initializer->string.begin;
2493         const wchar_rep_t *const end     = p + initializer->string.size;
2494         for (size_t i = 0; i < arr_len && p != end; ++i, ++p) {
2495                 entry.v.array_index = i;
2496
2497                 ir_node             *node = new_Const_long(mode_int, *p);
2498                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2499                 add_compound_ent_value_w_path(entity, node, path);
2500         }
2501 }
2502
2503 static void create_initializer_object(initializer_t *initializer, type_t *type,
2504                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2505 {
2506         if(is_type_array(type)) {
2507                 array_type_t *array_type = &type->array;
2508
2509                 switch (initializer->type) {
2510                         case INITIALIZER_STRING: {
2511                                 initializer_string_t *const string = &initializer->string;
2512                                 create_initializer_string(string, array_type, entity, entry, len);
2513                                 return;
2514                         }
2515
2516                         case INITIALIZER_WIDE_STRING: {
2517                                 initializer_wide_string_t *const string = &initializer->wide_string;
2518                                 create_initializer_wide_string(string, array_type, entity, entry, len);
2519                                 return;
2520                         }
2521
2522                         case INITIALIZER_LIST: {
2523                                 initializer_list_t *const list = &initializer->list;
2524                                 create_initializer_array(list, array_type, entity, entry, len);
2525                                 return;
2526                         }
2527
2528                         case INITIALIZER_VALUE:
2529                                 break;
2530                 }
2531                 panic("Unhandled initializer");
2532         } else {
2533                 assert(initializer->type == INITIALIZER_LIST);
2534                 initializer_list_t *list = &initializer->list;
2535
2536                 assert(is_type_compound(type));
2537                 compound_type_t *compound_type = &type->compound;
2538                 create_initializer_compound(list, compound_type, entity, entry, len);
2539         }
2540 }
2541
2542 static void create_initializer_local_variable_entity(declaration_t *declaration)
2543 {
2544         initializer_t *initializer = declaration->init.initializer;
2545         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2546         ir_entity     *entity      = declaration->v.entity;
2547         ir_node       *memory      = get_store();
2548         ir_node       *nomem       = new_NoMem();
2549         ir_node       *frame       = get_irg_frame(current_ir_graph);
2550         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2551
2552         if(initializer->type == INITIALIZER_VALUE) {
2553                 initializer_value_t *initializer_value = &initializer->value;
2554
2555                 ir_node *value = expression_to_firm(initializer_value->value);
2556                 type_t  *type  = skip_typeref(declaration->type);
2557                 assign_value(dbgi, addr, type, value);
2558                 return;
2559         }
2560
2561         /* create a "template" entity which is copied to the entity on the stack */
2562         ident     *const id          = unique_ident("initializer");
2563         ir_type   *const irtype      = get_ir_type(declaration->type);
2564         ir_type   *const global_type = get_glob_type();
2565         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
2566         set_entity_ld_ident(init_entity, id);
2567
2568         set_entity_variability(init_entity, variability_initialized);
2569         set_entity_visibility(init_entity, visibility_local);
2570         set_entity_allocation(init_entity, allocation_static);
2571
2572         ir_graph *const old_current_ir_graph = current_ir_graph;
2573         current_ir_graph = get_const_code_irg();
2574
2575         type_t *const type = skip_typeref(declaration->type);
2576         create_initializer_object(initializer, type, init_entity, NULL, 0);
2577
2578         assert(current_ir_graph == get_const_code_irg());
2579         current_ir_graph = old_current_ir_graph;
2580
2581         ir_node *const src_addr  = create_symconst(dbgi, init_entity);
2582         ir_node *const copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2583
2584         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2585         set_store(copyb_mem);
2586 }
2587
2588 static void create_initializer(declaration_t *declaration)
2589 {
2590         initializer_t *initializer = declaration->init.initializer;
2591         if(initializer == NULL)
2592                 return;
2593
2594         declaration_type_t declaration_type
2595                 = (declaration_type_t) declaration->declaration_type;
2596         if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY) {
2597                 create_initializer_local_variable_entity(declaration);
2598                 return;
2599         }
2600
2601         if(initializer->type == INITIALIZER_VALUE) {
2602                 initializer_value_t *initializer_value = &initializer->value;
2603
2604                 ir_node *value = expression_to_firm(initializer_value->value);
2605
2606                 if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2607                         set_value(declaration->v.value_number, value);
2608                 } else {
2609                         assert(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2610
2611                         ir_entity *entity = declaration->v.entity;
2612
2613                         set_entity_variability(entity, variability_initialized);
2614                         set_atomic_ent_value(entity, value);
2615                 }
2616         } else {
2617                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2618                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2619
2620                 ir_entity *entity = declaration->v.entity;
2621                 set_entity_variability(entity, variability_initialized);
2622
2623                 type_t *type = skip_typeref(declaration->type);
2624                 create_initializer_object(initializer, type, entity, NULL, 0);
2625         }
2626 }
2627
2628 static void create_local_variable(declaration_t *declaration)
2629 {
2630         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2631
2632         bool needs_entity = declaration->address_taken;
2633         type_t *type = skip_typeref(declaration->type);
2634
2635         if(is_type_array(type) || is_type_compound(type)) {
2636                 needs_entity = true;
2637         }
2638
2639         if(needs_entity) {
2640                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2641                 create_declaration_entity(declaration,
2642                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2643                                           frame_type);
2644         } else {
2645                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2646                 declaration->v.value_number   = next_value_number_function;
2647                 ++next_value_number_function;
2648         }
2649
2650         create_initializer(declaration);
2651 }
2652
2653 static void create_local_static_variable(declaration_t *declaration)
2654 {
2655         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2656
2657         type_t    *const type        = skip_typeref(declaration->type);
2658         ir_type   *const global_type = get_glob_type();
2659         ident     *const id          = unique_ident(declaration->symbol->string);
2660         ir_type   *const irtype      = get_ir_type(type);
2661         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
2662         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2663         set_entity_ld_ident(entity, id);
2664
2665         declaration->declaration_type = DECLARATION_TYPE_GLOBAL_VARIABLE;
2666         declaration->v.entity         = entity;
2667         set_entity_variability(entity, variability_uninitialized);
2668         set_entity_visibility(entity, visibility_local);
2669         set_entity_allocation(entity, allocation_static);
2670
2671         ir_graph *const old_current_ir_graph = current_ir_graph;
2672         current_ir_graph = get_const_code_irg();
2673
2674         create_initializer(declaration);
2675
2676         assert(current_ir_graph == get_const_code_irg());
2677         current_ir_graph = old_current_ir_graph;
2678 }
2679
2680
2681
2682 static void return_statement_to_firm(return_statement_t *statement)
2683 {
2684         if(get_cur_block() == NULL)
2685                 return;
2686
2687         ir_type *func_irtype = get_ir_type(current_function_decl->type);
2688
2689         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
2690
2691         ir_node *in[1];
2692         int      in_len;
2693         if(get_method_n_ress(func_irtype) > 0) {
2694                 ir_type *res_type = get_method_res_type(func_irtype, 0);
2695
2696                 if(statement->return_value != NULL) {
2697                         ir_node *node = expression_to_firm(statement->return_value);
2698                         node  = do_strict_conv(dbgi, node);
2699                         in[0] = node;
2700                 } else {
2701                         ir_mode *mode;
2702                         if(is_compound_type(res_type)) {
2703                                 mode = mode_P_data;
2704                         } else {
2705                                 mode = get_type_mode(res_type);
2706                         }
2707                         in[0] = new_Unknown(mode);
2708                 }
2709                 in_len = 1;
2710         } else {
2711                 /* build return_value for its side effects */
2712                 if(statement->return_value != NULL) {
2713                         expression_to_firm(statement->return_value);
2714                 }
2715                 in_len = 0;
2716         }
2717
2718         ir_node  *store = get_store();
2719         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
2720
2721         ir_node *end_block = get_irg_end_block(current_ir_graph);
2722         add_immBlock_pred(end_block, ret);
2723
2724         set_cur_block(NULL);
2725 }
2726
2727 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
2728 {
2729         if(get_cur_block() == NULL)
2730                 return NULL;
2731
2732         return expression_to_firm(statement->expression);
2733 }
2734
2735 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
2736 {
2737         ir_node     *result    = NULL;
2738         statement_t *statement = compound->statements;
2739         for( ; statement != NULL; statement = statement->base.next) {
2740                 //context2firm(&statement->context);
2741
2742                 if(statement->base.next == NULL
2743                                 && statement->kind == STATEMENT_EXPRESSION) {
2744                         result = expression_statement_to_firm(
2745                                         &statement->expression);
2746                         break;
2747                 }
2748                 statement_to_firm(statement);
2749         }
2750
2751         return result;
2752 }
2753
2754 static void create_local_declaration(declaration_t *declaration)
2755 {
2756         type_t *type = skip_typeref(declaration->type);
2757
2758         switch ((storage_class_tag_t) declaration->storage_class) {
2759         case STORAGE_CLASS_STATIC:
2760                 create_local_static_variable(declaration);
2761                 return;
2762         case STORAGE_CLASS_ENUM_ENTRY:
2763                 panic("enum entry declaration in local block found");
2764         case STORAGE_CLASS_EXTERN:
2765                 panic("extern declaration in local block found");
2766         case STORAGE_CLASS_NONE:
2767         case STORAGE_CLASS_AUTO:
2768         case STORAGE_CLASS_REGISTER:
2769                 if(is_type_function(type)) {
2770                         panic("nested functions not supported yet");
2771                 } else {
2772                         create_local_variable(declaration);
2773                 }
2774                 return;
2775         case STORAGE_CLASS_TYPEDEF:
2776         case STORAGE_CLASS_THREAD:
2777         case STORAGE_CLASS_THREAD_EXTERN:
2778         case STORAGE_CLASS_THREAD_STATIC:
2779                 return;
2780         }
2781         panic("invalid storage class found");
2782 }
2783
2784 static void declaration_statement_to_firm(declaration_statement_t *statement)
2785 {
2786         declaration_t *declaration = statement->declarations_begin;
2787         declaration_t *end         = statement->declarations_end->next;
2788         for( ; declaration != end; declaration = declaration->next) {
2789                 create_local_variable(declaration);
2790         }
2791 }
2792
2793 static void if_statement_to_firm(if_statement_t *statement)
2794 {
2795         ir_node *cur_block = get_cur_block();
2796
2797         ir_node *fallthrough_block = new_immBlock();
2798
2799         /* the true (blocks) */
2800         ir_node *true_block;
2801         if (statement->true_statement != NULL) {
2802                 true_block = new_immBlock();
2803                 statement_to_firm(statement->true_statement);
2804                 if(get_cur_block() != NULL) {
2805                         ir_node *jmp = new_Jmp();
2806                         add_immBlock_pred(fallthrough_block, jmp);
2807                 }
2808         } else {
2809                 true_block = fallthrough_block;
2810         }
2811
2812         /* the false (blocks) */
2813         ir_node *false_block;
2814         if(statement->false_statement != NULL) {
2815                 false_block = new_immBlock();
2816
2817                 statement_to_firm(statement->false_statement);
2818                 if(get_cur_block() != NULL) {
2819                         ir_node *jmp = new_Jmp();
2820                         add_immBlock_pred(fallthrough_block, jmp);
2821                 }
2822         } else {
2823                 false_block = fallthrough_block;
2824         }
2825
2826         /* create the condition */
2827         if(cur_block != NULL) {
2828                 set_cur_block(cur_block);
2829                 create_condition_evaluation(statement->condition, true_block,
2830                                             false_block);
2831         }
2832
2833         mature_immBlock(true_block);
2834         if(false_block != fallthrough_block) {
2835                 mature_immBlock(false_block);
2836         }
2837         mature_immBlock(fallthrough_block);
2838
2839         set_cur_block(fallthrough_block);
2840 }
2841
2842 static void while_statement_to_firm(while_statement_t *statement)
2843 {
2844         ir_node *jmp = NULL;
2845         if(get_cur_block() != NULL) {
2846                 jmp = new_Jmp();
2847         }
2848
2849         /* create the header block */
2850         ir_node *header_block = new_immBlock();
2851         if(jmp != NULL) {
2852                 add_immBlock_pred(header_block, jmp);
2853         }
2854
2855         /* the false block */
2856         ir_node *false_block = new_immBlock();
2857
2858         /* the loop body */
2859         ir_node *body_block;
2860         if (statement->body != NULL) {
2861                 ir_node *old_continue_label = continue_label;
2862                 ir_node *old_break_label    = break_label;
2863                 continue_label              = header_block;
2864                 break_label                 = false_block;
2865
2866                 body_block = new_immBlock();
2867                 statement_to_firm(statement->body);
2868
2869                 assert(continue_label == header_block);
2870                 assert(break_label    == false_block);
2871                 continue_label = old_continue_label;
2872                 break_label    = old_break_label;
2873
2874                 if(get_cur_block() != NULL) {
2875                         jmp = new_Jmp();
2876                         add_immBlock_pred(header_block, jmp);
2877                 }
2878         } else {
2879                 body_block = header_block;
2880         }
2881
2882         /* create the condition */
2883         set_cur_block(header_block);
2884
2885         create_condition_evaluation(statement->condition, body_block, false_block);
2886         mature_immBlock(body_block);
2887         mature_immBlock(false_block);
2888         mature_immBlock(header_block);
2889
2890         set_cur_block(false_block);
2891 }
2892
2893 static void do_while_statement_to_firm(do_while_statement_t *statement)
2894 {
2895         ir_node *jmp = NULL;
2896         if(get_cur_block() != NULL) {
2897                 jmp = new_Jmp();
2898         }
2899
2900         /* create the header block */
2901         ir_node *header_block = new_immBlock();
2902
2903         /* the false block */
2904         ir_node *false_block = new_immBlock();
2905
2906         /* the loop body */
2907         ir_node *body_block = new_immBlock();
2908         if(jmp != NULL) {
2909                 add_immBlock_pred(body_block, jmp);
2910         }
2911
2912         if (statement->body != NULL) {
2913                 ir_node *old_continue_label = continue_label;
2914                 ir_node *old_break_label    = break_label;
2915                 continue_label              = header_block;
2916                 break_label                 = false_block;
2917
2918                 statement_to_firm(statement->body);
2919
2920                 assert(continue_label == header_block);
2921                 assert(break_label    == false_block);
2922                 continue_label = old_continue_label;
2923                 break_label    = old_break_label;
2924
2925                 if (get_cur_block() == NULL) {
2926                         mature_immBlock(header_block);
2927                         mature_immBlock(body_block);
2928                         mature_immBlock(false_block);
2929                         return;
2930                 }
2931         }
2932
2933         ir_node *body_jmp = new_Jmp();
2934         add_immBlock_pred(header_block, body_jmp);
2935         mature_immBlock(header_block);
2936
2937         /* create the condition */
2938         set_cur_block(header_block);
2939
2940         create_condition_evaluation(statement->condition, body_block, false_block);
2941         mature_immBlock(body_block);
2942         mature_immBlock(false_block);
2943         mature_immBlock(header_block);
2944
2945         set_cur_block(false_block);
2946 }
2947
2948 static void for_statement_to_firm(for_statement_t *statement)
2949 {
2950         ir_node *jmp = NULL;
2951         if (get_cur_block() != NULL) {
2952                 if(statement->initialisation != NULL) {
2953                         expression_to_firm(statement->initialisation);
2954                 }
2955
2956                 /* create declarations */
2957                 declaration_t *declaration = statement->context.declarations;
2958                 for( ; declaration != NULL; declaration = declaration->next) {
2959                         create_local_declaration(declaration);
2960                 }
2961
2962                 jmp = new_Jmp();
2963         }
2964
2965
2966         /* create the step block */
2967         ir_node *const step_block = new_immBlock();
2968         if (statement->step != NULL) {
2969                 expression_to_firm(statement->step);
2970         }
2971         ir_node *const step_jmp = new_Jmp();
2972
2973         /* create the header block */
2974         ir_node *const header_block = new_immBlock();
2975         if (jmp != NULL) {
2976                 add_immBlock_pred(header_block, jmp);
2977         }
2978         add_immBlock_pred(header_block, step_jmp);
2979
2980         /* the false block */
2981         ir_node *const false_block = new_immBlock();
2982
2983         /* the loop body */
2984         ir_node * body_block;
2985         if (statement->body != NULL) {
2986                 ir_node *const old_continue_label = continue_label;
2987                 ir_node *const old_break_label    = break_label;
2988                 continue_label = step_block;
2989                 break_label    = false_block;
2990
2991                 body_block = new_immBlock();
2992                 statement_to_firm(statement->body);
2993
2994                 assert(continue_label == step_block);
2995                 assert(break_label    == false_block);
2996                 continue_label = old_continue_label;
2997                 break_label    = old_break_label;
2998
2999                 if (get_cur_block() != NULL) {
3000                         jmp = new_Jmp();
3001                         add_immBlock_pred(step_block, jmp);
3002                 }
3003         } else {
3004                 body_block = step_block;
3005         }
3006
3007         /* create the condition */
3008         set_cur_block(header_block);
3009         if (statement->condition != NULL) {
3010                 create_condition_evaluation(statement->condition, body_block,
3011                                             false_block);
3012         } else {
3013                 keep_alive(header_block);
3014                 jmp = new_Jmp();
3015                 add_immBlock_pred(body_block, jmp);
3016         }
3017
3018         mature_immBlock(body_block);
3019         mature_immBlock(false_block);
3020         mature_immBlock(step_block);
3021         mature_immBlock(header_block);
3022         mature_immBlock(false_block);
3023
3024         set_cur_block(false_block);
3025 }
3026
3027 static void create_jump_statement(const statement_t *statement,
3028                                   ir_node *target_block)
3029 {
3030         if(get_cur_block() == NULL)
3031                 return;
3032
3033         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3034         ir_node  *jump = new_d_Jmp(dbgi);
3035         add_immBlock_pred(target_block, jump);
3036
3037         set_cur_block(NULL);
3038 }
3039
3040 static void switch_statement_to_firm(const switch_statement_t *statement)
3041 {
3042         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
3043
3044         ir_node *expression  = expression_to_firm(statement->expression);
3045         ir_node *cond        = new_d_Cond(dbgi, expression);
3046         ir_node *break_block = new_immBlock();
3047
3048         set_cur_block(NULL);
3049
3050         ir_node *const old_switch_cond       = current_switch_cond;
3051         ir_node *const old_break_label       = break_label;
3052         const bool     old_saw_default_label = saw_default_label;
3053         current_switch_cond                  = cond;
3054         break_label                          = break_block;
3055
3056         statement_to_firm(statement->body);
3057
3058         if(get_cur_block() != NULL) {
3059                 ir_node *jmp = new_Jmp();
3060                 add_immBlock_pred(break_block, jmp);
3061         }
3062
3063         if (!saw_default_label) {
3064                 set_cur_block(get_nodes_block(cond));
3065                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
3066                                                         MAGIC_DEFAULT_PN_NUMBER);
3067                 add_immBlock_pred(break_block, proj);
3068         }
3069
3070         assert(current_switch_cond == cond);
3071         assert(break_label         == break_block);
3072         current_switch_cond = old_switch_cond;
3073         break_label         = old_break_label;
3074         saw_default_label   = old_saw_default_label;
3075
3076         mature_immBlock(break_block);
3077         set_cur_block(break_block);
3078 }
3079
3080 static void case_label_to_firm(const case_label_statement_t *statement)
3081 {
3082         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
3083
3084         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
3085
3086         /* let's create a node and hope firm constant folding creates a Const
3087          * node... */
3088         ir_node *proj;
3089         set_cur_block(get_nodes_block(current_switch_cond));
3090         if(statement->expression) {
3091                 long pn = fold_constant(statement->expression);
3092                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
3093                         /* oops someone detected our cheating... */
3094                         panic("magic default pn used");
3095                 }
3096                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
3097         } else {
3098                 saw_default_label = true;
3099                 proj = new_d_defaultProj(dbgi, current_switch_cond,
3100                                          MAGIC_DEFAULT_PN_NUMBER);
3101         }
3102
3103         ir_node *block = new_immBlock();
3104         if (fallthrough != NULL) {
3105                 add_immBlock_pred(block, fallthrough);
3106         }
3107         add_immBlock_pred(block, proj);
3108         mature_immBlock(block);
3109
3110         if(statement->label_statement != NULL) {
3111                 statement_to_firm(statement->label_statement);
3112         }
3113 }
3114
3115 static ir_node *get_label_block(declaration_t *label)
3116 {
3117         assert(label->namespc == NAMESPACE_LABEL);
3118
3119         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
3120                 return label->v.block;
3121         }
3122         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
3123
3124         ir_node *old_cur_block = get_cur_block();
3125         ir_node *block         = new_immBlock();
3126         set_cur_block(old_cur_block);
3127
3128         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
3129         label->v.block          = block;
3130
3131         ARR_APP1(ir_node *, imature_blocks, block);
3132
3133         return block;
3134 }
3135
3136 static void label_to_firm(const label_statement_t *statement)
3137 {
3138         ir_node *block = get_label_block(statement->label);
3139
3140         if(get_cur_block() != NULL) {
3141                 ir_node *jmp = new_Jmp();
3142                 add_immBlock_pred(block, jmp);
3143         }
3144
3145         set_cur_block(block);
3146         keep_alive(block);
3147
3148         if(statement->label_statement != NULL) {
3149                 statement_to_firm(statement->label_statement);
3150         }
3151 }
3152
3153 static void goto_to_firm(const goto_statement_t *statement)
3154 {
3155         if(get_cur_block() == NULL)
3156                 return;
3157
3158         ir_node *block = get_label_block(statement->label);
3159         ir_node *jmp   = new_Jmp();
3160         add_immBlock_pred(block, jmp);
3161
3162         set_cur_block(NULL);
3163 }
3164
3165 typedef enum modifier_t {
3166         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
3167         ASM_MODIFIER_READ_WRITE   = 1 << 1,
3168         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
3169         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
3170 } modifier_t;
3171
3172 #if 0
3173 static void asm_statement_to_firm(const asm_statement_t *statement)
3174 {
3175         bool needs_memory = false;
3176
3177         size_t         n_clobbers = 0;
3178         asm_clobber_t *clobber    = statement->clobbers;
3179         for( ; clobber != NULL; clobber = clobber->next) {
3180                 if(strcmp(clobber->clobber, "memory") == 0) {
3181                         needs_memory = true;
3182                         continue;
3183                 }
3184
3185                 ident *id = new_id_from_str(clobber->clobber);
3186                 obstack_ptr_grow(&asm_obst, id);
3187                 ++n_clobbers;
3188         }
3189         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
3190         ident **clobbers = NULL;
3191         if(n_clobbers > 0) {
3192                 clobbers = obstack_finish(&asm_obst);
3193         }
3194
3195         /* find and count input and output constraints */
3196         asm_constraint_t *constraint = statement->inputs;
3197         for( ; constraint != NULL; constraint = constraint->next) {
3198                 int  modifiers      = 0;
3199                 bool supports_memop = false;
3200                 for(const char *c = constraint->constraints; *c != 0; ++c) {
3201                         /* TODO: improve error messages */
3202                         switch(*c) {
3203                         case '?':
3204                         case '!':
3205                                 panic("multiple alternative assembler constraints not "
3206                                       "supported");
3207                         case 'm':
3208                         case 'o':
3209                         case 'V':
3210                         case '<':
3211                         case '>':
3212                         case 'X':
3213                                 supports_memop = true;
3214                                 obstack_1grow(&asm_obst, *c);
3215                                 break;
3216                         case '=':
3217                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
3218                                         panic("inconsistent register constraints");
3219                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
3220                                 break;
3221                         case '+':
3222                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
3223                                         panic("inconsistent register constraints");
3224                                 modifiers |= ASM_MODIFIER_READ_WRITE;
3225                                 break;
3226                         case '&':
3227                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
3228                                 panic("early clobber assembler constraint not supported yet");
3229                                 break;
3230                         case '%':
3231                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
3232                                 panic("commutative assembler constraint not supported yet");
3233                                 break;
3234                         case '#':
3235                                 /* skip register preferences stuff... */
3236                                 while(*c != 0 && *c != ',')
3237                                         ++c;
3238                                 break;
3239                         case '*':
3240                                 /* skip register preferences stuff... */
3241                                 ++c;
3242                                 break;
3243                         default:
3244                                 obstack_1grow(&asm_obst, *c);
3245                                 break;
3246                         }
3247                 }
3248                 obstack_1grow(&asm_obst, '\0');
3249                 const char *constraint_string = obstack_finish(&asm_obst);
3250
3251                 needs_memory |= supports_memop;
3252                 if(supports_memop) {
3253
3254                 }
3255         }
3256
3257 }
3258 #endif
3259
3260 static void statement_to_firm(statement_t *statement)
3261 {
3262         switch(statement->kind) {
3263         case STATEMENT_INVALID:
3264                 panic("invalid statement found");
3265         case STATEMENT_COMPOUND:
3266                 compound_statement_to_firm(&statement->compound);
3267                 return;
3268         case STATEMENT_RETURN:
3269                 return_statement_to_firm(&statement->returns);
3270                 return;
3271         case STATEMENT_EXPRESSION:
3272                 expression_statement_to_firm(&statement->expression);
3273                 return;
3274         case STATEMENT_IF:
3275                 if_statement_to_firm(&statement->ifs);
3276                 return;
3277         case STATEMENT_WHILE:
3278                 while_statement_to_firm(&statement->whiles);
3279                 return;
3280         case STATEMENT_DO_WHILE:
3281                 do_while_statement_to_firm(&statement->do_while);
3282                 return;
3283         case STATEMENT_DECLARATION:
3284                 declaration_statement_to_firm(&statement->declaration);
3285                 return;
3286         case STATEMENT_BREAK:
3287                 create_jump_statement(statement, break_label);
3288                 return;
3289         case STATEMENT_CONTINUE:
3290                 create_jump_statement(statement, continue_label);
3291                 return;
3292         case STATEMENT_SWITCH:
3293                 switch_statement_to_firm(&statement->switchs);
3294                 return;
3295         case STATEMENT_CASE_LABEL:
3296                 case_label_to_firm(&statement->case_label);
3297                 return;
3298         case STATEMENT_FOR:
3299                 for_statement_to_firm(&statement->fors);
3300                 return;
3301         case STATEMENT_LABEL:
3302                 label_to_firm(&statement->label);
3303                 return;
3304         case STATEMENT_GOTO:
3305                 goto_to_firm(&statement->gotos);
3306                 return;
3307         case STATEMENT_ASM:
3308                 //asm_statement_to_firm(&statement->asms);
3309                 //return;
3310                 break;
3311         }
3312         panic("Statement not implemented\n");
3313 }
3314
3315 static int count_decls_in_expression(const expression_t *expression);
3316
3317 static int count_local_declarations(const declaration_t *      decl,
3318                                     const declaration_t *const end)
3319 {
3320         int count = 0;
3321         for (; decl != end; decl = decl->next) {
3322                 const type_t *type = skip_typeref(decl->type);
3323                 switch (type->kind) {
3324                         case TYPE_ATOMIC:
3325                         case TYPE_ENUM:
3326                         case TYPE_POINTER:
3327                                 if (!decl->address_taken)
3328                                         ++count;
3329                                 break;
3330
3331                         default: break;
3332                 }
3333                 const initializer_t *initializer = decl->init.initializer;
3334                 /* FIXME: should walk initializer hierarchies... */
3335                 if(initializer != NULL && initializer->type == INITIALIZER_VALUE) {
3336                         count += count_decls_in_expression(initializer->value.value);
3337                 }
3338         }
3339         return count;
3340 }
3341
3342 static int count_decls_in_expression(const expression_t *expression) {
3343         if(expression == NULL)
3344                 return 0;
3345
3346         switch(expression->base.kind) {
3347         case EXPR_STATEMENT:
3348                 return count_decls_in_stmts(expression->statement.statement);
3349         EXPR_BINARY_CASES
3350                 return count_decls_in_expression(expression->binary.left)
3351                         + count_decls_in_expression(expression->binary.right);
3352         EXPR_UNARY_CASES
3353                 return count_decls_in_expression(expression->unary.value);
3354
3355         default:
3356                 break;
3357         }
3358
3359         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
3360          * (or implement all the missing expressions here/implement a walker)
3361          */
3362
3363         return 0;
3364 }
3365
3366 static int count_decls_in_stmts(const statement_t *stmt)
3367 {
3368         int count = 0;
3369         for (; stmt != NULL; stmt = stmt->base.next) {
3370                 switch (stmt->kind) {
3371                         case STATEMENT_DECLARATION: {
3372                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
3373                                 count += count_local_declarations(decl_stmt->declarations_begin,
3374                                                                   decl_stmt->declarations_end->next);
3375                                 break;
3376                         }
3377
3378                         case STATEMENT_COMPOUND: {
3379                                 const compound_statement_t *const comp =
3380                                         &stmt->compound;
3381                                 count += count_decls_in_stmts(comp->statements);
3382                                 break;
3383                         }
3384
3385                         case STATEMENT_IF: {
3386                                 const if_statement_t *const if_stmt = &stmt->ifs;
3387                                 count += count_decls_in_expression(if_stmt->condition);
3388                                 count += count_decls_in_stmts(if_stmt->true_statement);
3389                                 count += count_decls_in_stmts(if_stmt->false_statement);
3390                                 break;
3391                         }
3392
3393                         case STATEMENT_SWITCH: {
3394                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
3395                                 count += count_decls_in_expression(switch_stmt->expression);
3396                                 count += count_decls_in_stmts(switch_stmt->body);
3397                                 break;
3398                         }
3399
3400                         case STATEMENT_LABEL: {
3401                                 const label_statement_t *const label_stmt = &stmt->label;
3402                                 count += count_decls_in_stmts(label_stmt->label_statement);
3403                                 break;
3404                         }
3405
3406                         case STATEMENT_WHILE: {
3407                                 const while_statement_t *const while_stmt = &stmt->whiles;
3408                                 count += count_decls_in_expression(while_stmt->condition);
3409                                 count += count_decls_in_stmts(while_stmt->body);
3410                                 break;
3411                         }
3412
3413                         case STATEMENT_DO_WHILE: {
3414                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
3415                                 count += count_decls_in_expression(do_while_stmt->condition);
3416                                 count += count_decls_in_stmts(do_while_stmt->body);
3417                                 break;
3418                         }
3419
3420                         case STATEMENT_FOR: {
3421                                 const for_statement_t *const for_stmt = &stmt->fors;
3422                                 count += count_local_declarations(for_stmt->context.declarations, NULL);
3423                                 count += count_decls_in_expression(for_stmt->initialisation);
3424                                 count += count_decls_in_expression(for_stmt->condition);
3425                                 count += count_decls_in_expression(for_stmt->step);
3426                                 count += count_decls_in_stmts(for_stmt->body);
3427                                 break;
3428                         }
3429
3430                         case STATEMENT_CASE_LABEL: {
3431                                 const case_label_statement_t *label = &stmt->case_label;
3432                                 count += count_decls_in_expression(label->expression);
3433                                 count += count_decls_in_stmts(label->label_statement);
3434                                 break;
3435                         }
3436
3437                         case STATEMENT_ASM:
3438                         case STATEMENT_BREAK:
3439                         case STATEMENT_CONTINUE:
3440                                 break;
3441
3442                         case STATEMENT_EXPRESSION: {
3443                                 const expression_statement_t *expr_stmt = &stmt->expression;
3444                                 count += count_decls_in_expression(expr_stmt->expression);
3445                                 break;
3446                         }
3447
3448                         case STATEMENT_GOTO:
3449                         case STATEMENT_INVALID:
3450                                 break;
3451
3452                         case STATEMENT_RETURN: {
3453                                 const return_statement_t *ret_stmt = &stmt->returns;
3454                                 count += count_decls_in_expression(ret_stmt->return_value);
3455                                 break;
3456                         }
3457                 }
3458         }
3459         return count;
3460 }
3461
3462 static int get_function_n_local_vars(declaration_t *declaration)
3463 {
3464         int count = 0;
3465
3466         /* count parameters */
3467         count += count_local_declarations(declaration->context.declarations, NULL);
3468
3469         /* count local variables declared in body */
3470         count += count_decls_in_stmts(declaration->init.statement);
3471
3472         return count;
3473 }
3474
3475 static void initialize_function_parameters(declaration_t *declaration)
3476 {
3477         ir_graph        *irg             = current_ir_graph;
3478         ir_node         *args            = get_irg_args(irg);
3479         ir_node         *start_block     = get_irg_start_block(irg);
3480         ir_type         *function_irtype = get_ir_type(declaration->type);
3481
3482         int            n         = 0;
3483         declaration_t *parameter = declaration->context.declarations;
3484         for( ; parameter != NULL; parameter = parameter->next, ++n) {
3485                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
3486                 type_t *type = skip_typeref(parameter->type);
3487
3488                 bool needs_entity = parameter->address_taken;
3489                 assert(!is_type_array(type));
3490                 if(is_type_compound(type)) {
3491                         needs_entity = true;
3492                 }
3493
3494                 if(needs_entity) {
3495                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
3496                         ident     *id     = new_id_from_str(parameter->symbol->string);
3497                         set_entity_ident(entity, id);
3498
3499                         parameter->declaration_type
3500                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
3501                         parameter->v.entity = entity;
3502                         continue;
3503                 }
3504
3505                 ir_mode *mode = get_ir_mode(parameter->type);
3506                 long     pn   = n;
3507                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
3508
3509                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
3510                 parameter->v.value_number   = next_value_number_function;
3511                 ++next_value_number_function;
3512
3513                 set_value(parameter->v.value_number, proj);
3514         }
3515 }
3516
3517 /**
3518  * Handle additional decl modifiers for IR-graphs
3519  *
3520  * @param irg            the IR-graph
3521  * @param dec_modifiers  additional modifiers
3522  */
3523 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
3524 {
3525         if (decl_modifiers & DM_NORETURN) {
3526                 /* TRUE if the declaration includes the Microsoft
3527                    __declspec(noreturn) specifier. */
3528                 set_irg_additional_property(irg, mtp_property_noreturn);
3529         }
3530         if (decl_modifiers & DM_NOTHROW) {
3531                 /* TRUE if the declaration includes the Microsoft
3532                    __declspec(nothrow) specifier. */
3533                 set_irg_additional_property(irg, mtp_property_nothrow);
3534         }
3535         if (decl_modifiers & DM_NAKED) {
3536                 /* TRUE if the declaration includes the Microsoft
3537                    __declspec(naked) specifier. */
3538                 set_irg_additional_property(irg, mtp_property_naked);
3539         }
3540         if (decl_modifiers & DM_FORCEINLINE) {
3541                 /* TRUE if the declaration includes the
3542                    Microsoft __forceinline specifier. */
3543                 set_irg_inline_property(irg, irg_inline_forced);
3544         }
3545         if (decl_modifiers & DM_NOINLINE) {
3546                 /* TRUE if the declaration includes the Microsoft
3547                    __declspec(noinline) specifier. */
3548                 set_irg_inline_property(irg, irg_inline_forbidden);
3549         }
3550 }
3551
3552 static void create_function(declaration_t *declaration)
3553 {
3554         ir_entity *function_entity = get_function_entity(declaration);
3555
3556         if(declaration->init.statement == NULL)
3557                 return;
3558
3559         current_function_decl = declaration;
3560         current_function_name = NULL;
3561
3562         assert(imature_blocks == NULL);
3563         imature_blocks = NEW_ARR_F(ir_node*, 0);
3564
3565         int       n_local_vars = get_function_n_local_vars(declaration);
3566         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
3567         ir_node  *first_block  = get_cur_block();
3568
3569         /* set inline flags */
3570         if (declaration->is_inline)
3571         set_irg_inline_property(irg, irg_inline_recomended);
3572     handle_decl_modifier_irg(irg, declaration->decl_modifiers);
3573
3574         next_value_number_function = 0;
3575         initialize_function_parameters(declaration);
3576
3577         statement_to_firm(declaration->init.statement);
3578
3579         ir_node *end_block = get_irg_end_block(irg);
3580
3581         /* do we have a return statement yet? */
3582         if(get_cur_block() != NULL) {
3583                 type_t *type = skip_typeref(declaration->type);
3584                 assert(is_type_function(type));
3585                 const function_type_t *func_type   = &type->function;
3586                 const type_t          *return_type
3587                         = skip_typeref(func_type->return_type);
3588
3589                 ir_node *ret;
3590                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
3591                         ret = new_Return(get_store(), 0, NULL);
3592                 } else {
3593                         ir_mode *mode;
3594                         if(is_type_scalar(return_type)) {
3595                                 mode = get_ir_mode(func_type->return_type);
3596                         } else {
3597                                 mode = mode_P_data;
3598                         }
3599
3600                         ir_node *in[1];
3601                         /* §5.1.2.2.3 main implicitly returns 0 */
3602                         if (strcmp(declaration->symbol->string, "main") == 0) {
3603                                 in[0] = new_Const(mode, get_mode_null(mode));
3604                         } else {
3605                                 in[0] = new_Unknown(mode);
3606                         }
3607                         ret = new_Return(get_store(), 1, in);
3608                 }
3609                 add_immBlock_pred(end_block, ret);
3610         }
3611
3612         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
3613                 mature_immBlock(imature_blocks[i]);
3614         }
3615         DEL_ARR_F(imature_blocks);
3616         imature_blocks = NULL;
3617
3618         mature_immBlock(first_block);
3619         mature_immBlock(end_block);
3620
3621         irg_finalize_cons(irg);
3622
3623         /* finalize the frame type */
3624         ir_type *frame_type = get_irg_frame_type(irg);
3625         int      n          = get_compound_n_members(frame_type);
3626         int      align_all  = 4;
3627         int      offset     = 0;
3628         for(int i = 0; i < n; ++i) {
3629                 ir_entity *entity      = get_compound_member(frame_type, i);
3630                 ir_type   *entity_type = get_entity_type(entity);
3631
3632                 int align = get_type_alignment_bytes(entity_type);
3633                 if(align > align_all)
3634                         align_all = align;
3635                 int misalign = 0;
3636                 if(align > 0) {
3637                         misalign  = offset % align;
3638                         if(misalign > 0) {
3639                                 offset += align - misalign;
3640                         }
3641                 }
3642
3643                 set_entity_offset(entity, offset);
3644                 offset += get_type_size_bytes(entity_type);
3645         }
3646         set_type_size_bytes(frame_type, offset);
3647         set_type_alignment_bytes(frame_type, align_all);
3648         set_type_state(frame_type, layout_fixed);
3649
3650         irg_vrfy(irg);
3651 }
3652
3653 static void create_global_variable(declaration_t *declaration)
3654 {
3655         ir_visibility  vis;
3656         ir_type       *var_type;
3657         switch ((storage_class_tag_t)declaration->storage_class) {
3658                 case STORAGE_CLASS_STATIC:
3659                         vis = visibility_local;
3660                         goto global_var;
3661
3662                 case STORAGE_CLASS_EXTERN:
3663                         vis = visibility_external_allocated;
3664                         goto global_var;
3665
3666                 case STORAGE_CLASS_NONE:
3667                         vis = visibility_external_visible;
3668                         goto global_var;
3669
3670                 case STORAGE_CLASS_THREAD:
3671                         vis = visibility_external_visible;
3672                         goto tls_var;
3673
3674                 case STORAGE_CLASS_THREAD_EXTERN:
3675                         vis = visibility_external_allocated;
3676                         goto tls_var;
3677
3678                 case STORAGE_CLASS_THREAD_STATIC:
3679                         vis = visibility_local;
3680                         goto tls_var;
3681
3682 tls_var:
3683                         var_type = get_tls_type();
3684                         goto create_var;
3685
3686 global_var:
3687                         var_type = get_glob_type();
3688                         goto create_var;
3689
3690 create_var:
3691                         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
3692                                                   var_type);
3693                         set_entity_visibility(declaration->v.entity, vis);
3694
3695                         current_ir_graph = get_const_code_irg();
3696                         create_initializer(declaration);
3697                         return;
3698
3699                 case STORAGE_CLASS_TYPEDEF:
3700                 case STORAGE_CLASS_AUTO:
3701                 case STORAGE_CLASS_REGISTER:
3702                 case STORAGE_CLASS_ENUM_ENTRY:
3703                         break;
3704         }
3705         panic("Invalid storage class for global variable");
3706 }
3707
3708 static void context_to_firm(context_t *context)
3709 {
3710         /* first pass: create declarations */
3711         declaration_t *declaration = context->declarations;
3712         for( ; declaration != NULL; declaration = declaration->next) {
3713                 if(declaration->namespc != NAMESPACE_NORMAL)
3714                         continue;
3715                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3716                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3717                         continue;
3718                 if(declaration->symbol == NULL)
3719                         continue;
3720
3721                 type_t *type = skip_typeref(declaration->type);
3722                 if(is_type_function(type)) {
3723                         get_function_entity(declaration);
3724                 } else {
3725                         create_global_variable(declaration);
3726                 }
3727         }
3728
3729         /* second pass: create code */
3730         declaration = context->declarations;
3731         for( ; declaration != NULL; declaration = declaration->next) {
3732                 if(declaration->namespc != NAMESPACE_NORMAL)
3733                         continue;
3734                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3735                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3736                         continue;
3737                 if(declaration->symbol == NULL)
3738                         continue;
3739
3740                 type_t *type = declaration->type;
3741                 if(type->kind != TYPE_FUNCTION)
3742                         continue;
3743
3744                 create_function(declaration);
3745         }
3746 }
3747
3748 void init_ast2firm(void)
3749 {
3750         obstack_init(&asm_obst);
3751         init_atomic_modes();
3752
3753         /* create idents for all known runtime functions */
3754         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
3755                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
3756         }
3757 }
3758
3759 void exit_ast2firm(void)
3760 {
3761         obstack_free(&asm_obst, NULL);
3762 }
3763
3764 void translation_unit_to_firm(translation_unit_t *unit)
3765 {
3766         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3767         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
3768         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
3769
3770         ir_type_int        = get_ir_type(type_int);
3771         ir_type_const_char = get_ir_type(type_const_char);
3772         ir_type_wchar_t    = get_ir_type(type_wchar_t);
3773         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
3774                                                        type in firm */
3775
3776         type_void->base.firm_type = ir_type_void;
3777
3778         /* just to be sure */
3779         continue_label      = NULL;
3780         break_label         = NULL;
3781         current_switch_cond = NULL;
3782
3783         context_to_firm(&unit->context);
3784 }