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_kind_t {
  48         DECLARATION_KIND_UNKNOWN,
  49         DECLARATION_KIND_FUNCTION,
  50         DECLARATION_KIND_GLOBAL_VARIABLE,
  51         DECLARATION_KIND_LOCAL_VARIABLE,
  52         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  53         DECLARATION_KIND_COMPOUND_MEMBER,
  54         DECLARATION_KIND_LABEL_BLOCK,
  55         DECLARATION_KIND_ENUM_ENTRY
  56 } declaration_kind_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_kind = DECLARATION_KIND_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_kind = DECLARATION_KIND_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_kind = DECLARATION_KIND_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_kind == DECLARATION_KIND_FUNCTION)
 738                 return declaration->v.entity;
 739         assert(declaration->declaration_kind == DECLARATION_KIND_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_kind = DECLARATION_KIND_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_mode *mode, ir_entity *entity)
 816 {
 817         assert(entity != NULL);
 818         union symconst_symbol sym;
 819         sym.entity_p = entity;
 820         return new_d_SymConst(dbgi, mode, 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, mode_P_data, 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, mode_P_data, 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_kind == DECLARATION_KIND_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, mode_P_data, 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_kind_t) declaration->declaration_kind) {
 965         case DECLARATION_KIND_UNKNOWN:
 966                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
 967                         break;
 968                 }
 969                 get_ir_type(type);
 970                 /* FALLTHROUGH */
 971
 972         case DECLARATION_KIND_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_KIND_LOCAL_VARIABLE: {
 978                 ir_mode *const mode = get_ir_mode(type);
 979                 return get_value(declaration->v.value_number, mode);
 980         }
 981         case DECLARATION_KIND_FUNCTION: {
 982                 ir_mode *const mode = get_ir_mode(type);
 983                 return create_symconst(dbgi, mode, declaration->v.entity);
 984         }
 985         case DECLARATION_KIND_GLOBAL_VARIABLE: {
 986                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
 987                 ir_type *const irtype = get_entity_type(declaration->v.entity);
 988                 return deref_address(irtype, addr, dbgi);
 989         }
 990
 991         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
 992                 ir_entity *entity = declaration->v.entity;
 993                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 994                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 995                 ir_type   *irtype = get_entity_type(entity);
 996                 return deref_address(irtype, sel, dbgi);
 997         }
 998
 999         case DECLARATION_KIND_COMPOUND_MEMBER:
1000         case DECLARATION_KIND_LABEL_BLOCK:
1001                 panic("not implemented reference type");
1002         }
1003
1004         panic("reference to declaration with unknown type found");
1005 }
1006
1007 static ir_node *reference_addr(const reference_expression_t *ref)
1008 {
1009         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
1010         declaration_t *declaration = ref->declaration;
1011
1012         switch((declaration_kind_t) declaration->declaration_kind) {
1013         case DECLARATION_KIND_UNKNOWN:
1014                 break;
1015         case DECLARATION_KIND_LOCAL_VARIABLE:
1016                 panic("local variable without entity has no address");
1017         case DECLARATION_KIND_FUNCTION: {
1018                 type_t *const  type = skip_typeref(ref->expression.datatype);
1019                 ir_mode *const mode = get_ir_mode(type);
1020                 return create_symconst(dbgi, mode, declaration->v.entity);
1021         }
1022         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1023                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1024                 return addr;
1025         }
1026         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1027                 ir_entity *entity = declaration->v.entity;
1028                 ir_node   *frame  = get_irg_frame(current_ir_graph);
1029                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1030
1031                 return sel;
1032         }
1033
1034         case DECLARATION_KIND_ENUM_ENTRY:
1035                 panic("trying to reference enum entry");
1036
1037         case DECLARATION_KIND_COMPOUND_MEMBER:
1038         case DECLARATION_KIND_LABEL_BLOCK:
1039                 panic("not implemented reference type");
1040         }
1041
1042         panic("reference to declaration with unknown type found");
1043 }
1044
1045 static ir_node *process_builtin_call(const call_expression_t *call)
1046 {
1047         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
1048
1049         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1050         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1051
1052         type_t *type = skip_typeref(builtin->expression.datatype);
1053         assert(is_type_pointer(type));
1054
1055         type_t   *function_type = skip_typeref(type->pointer.points_to);
1056         symbol_t *symbol        = builtin->symbol;
1057
1058         switch(symbol->ID) {
1059         case T___builtin_alloca: {
1060                 if(call->arguments == NULL || call->arguments->next != NULL) {
1061                         panic("invalid number of parameters on __builtin_alloca");
1062                 }
1063                 expression_t *argument = call->arguments->expression;
1064                 ir_node      *size     = expression_to_firm(argument);
1065
1066                 ir_node *store  = get_store();
1067                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1068                                               stack_alloc);
1069                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1070                 set_store(proj_m);
1071                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1072
1073                 return res;
1074         }
1075         case T___builtin_nan:
1076         case T___builtin_nanf:
1077         case T___builtin_nand: {
1078                 /* Ignore string for now... */
1079                 assert(is_type_function(function_type));
1080                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1081                 tarval  *tv   = get_mode_NAN(mode);
1082                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1083                 return res;
1084         }
1085         case T___builtin_va_end:
1086                 return NULL;
1087         default:
1088                 panic("Unsupported builtin found\n");
1089         }
1090 }
1091
1092 static ir_node *call_expression_to_firm(const call_expression_t *call)
1093 {
1094         assert(get_cur_block() != NULL);
1095
1096         expression_t *function = call->function;
1097         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1098                 return process_builtin_call(call);
1099         }
1100         ir_node *callee = expression_to_firm(function);
1101
1102         type_t *type = skip_typeref(function->base.datatype);
1103         assert(is_type_pointer(type));
1104         pointer_type_t *pointer_type = &type->pointer;
1105         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1106         assert(is_type_function(points_to));
1107         function_type_t *function_type = &points_to->function;
1108
1109         int              n_parameters = 0;
1110         call_argument_t *argument     = call->arguments;
1111         for( ; argument != NULL; argument = argument->next) {
1112                 ++n_parameters;
1113         }
1114
1115         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
1116
1117         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1118         ir_type *new_method_type = NULL;
1119         if(function_type->variadic || function_type->unspecified_parameters) {
1120                 /* we need to construct a new method type matching the call
1121                  * arguments... */
1122                 int n_res       = get_method_n_ress(ir_method_type);
1123                 new_method_type = new_type_method(unique_ident("calltype"),
1124                                                   n_parameters, n_res);
1125                 set_method_calling_convention(new_method_type,
1126                                get_method_calling_convention(ir_method_type));
1127                 set_method_additional_properties(new_method_type,
1128                                get_method_additional_properties(ir_method_type));
1129
1130                 for(int i = 0; i < n_res; ++i) {
1131                         set_method_res_type(new_method_type, i,
1132                                             get_method_res_type(ir_method_type, i));
1133                 }
1134         }
1135         ir_node *in[n_parameters];
1136
1137         argument = call->arguments;
1138         int n = 0;
1139         for( ; argument != NULL; argument = argument->next) {
1140                 expression_t *expression = argument->expression;
1141                 ir_node      *arg_node   = expression_to_firm(expression);
1142
1143                 arg_node = do_strict_conv(dbgi, arg_node);
1144
1145                 in[n] = arg_node;
1146                 if(new_method_type != NULL) {
1147                         ir_type *irtype = get_ir_type(expression->base.datatype);
1148                         set_method_param_type(new_method_type, n, irtype);
1149                 }
1150
1151                 n++;
1152         }
1153         assert(n == n_parameters);
1154
1155         if(new_method_type != NULL)
1156                 ir_method_type = new_method_type;
1157
1158         ir_node  *store = get_store();
1159         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1160                                      ir_method_type);
1161         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1162         set_store(mem);
1163
1164         type_t  *return_type = skip_typeref(function_type->return_type);
1165         ir_node *result      = NULL;
1166
1167         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1168                 ir_mode *mode;
1169                 if(is_type_scalar(return_type)) {
1170                         mode = get_ir_mode(return_type);
1171                 } else {
1172                         mode = mode_P_data;
1173                 }
1174                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1175                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1176         }
1177
1178         return result;
1179 }
1180
1181 static void statement_to_firm(statement_t *statement);
1182 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1183
1184 static ir_node *expression_to_addr(const expression_t *expression);
1185 static void create_condition_evaluation(const expression_t *expression,
1186                                         ir_node *true_block,
1187                                         ir_node *false_block);
1188
1189 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1190                          ir_node *value)
1191 {
1192         value = do_strict_conv(dbgi, value);
1193
1194         ir_node  *memory = get_store();
1195
1196         if(is_type_scalar(type)) {
1197                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1198                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1199                 set_store(store_mem);
1200         } else {
1201                 ir_type *irtype    = get_ir_type(type);
1202                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1203                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1204                 set_store(copyb_mem);
1205         }
1206 }
1207
1208 static void set_value_for_expression(const expression_t *expression,
1209                                      ir_node *value)
1210 {
1211         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1212         value          = do_strict_conv(dbgi, value);
1213
1214         if(expression->kind == EXPR_REFERENCE) {
1215                 const reference_expression_t *ref = &expression->reference;
1216
1217                 declaration_t *declaration = ref->declaration;
1218                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1219                 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1220                         set_value(declaration->v.value_number, value);
1221                         return;
1222                 }
1223         }
1224
1225         ir_node *addr = expression_to_addr(expression);
1226         type_t  *type = skip_typeref(expression->base.datatype);
1227         assign_value(dbgi, addr, type, value);
1228 }
1229
1230 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1231 {
1232         ir_mode *value_mode = get_irn_mode(value);
1233
1234         if (value_mode == dest_mode || is_Bad(value))
1235                 return value;
1236
1237         if(dest_mode == mode_b) {
1238                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1239                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1240                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1241                 return proj;
1242         }
1243
1244         return new_d_Conv(dbgi, value, dest_mode);
1245 }
1246
1247 static ir_node *create_incdec(const unary_expression_t *expression)
1248 {
1249         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
1250         type_t       *type  = skip_typeref(expression->expression.datatype);
1251         ir_mode      *mode  = get_ir_mode(type);
1252         expression_t *value = expression->value;
1253
1254         ir_node *value_node = expression_to_firm(value);
1255
1256         ir_node *offset;
1257         if(is_type_pointer(type)) {
1258                 pointer_type_t *pointer_type = &type->pointer;
1259                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1260                 offset = new_Const_long(mode_int, elem_size);
1261         } else {
1262                 assert(is_type_arithmetic(type));
1263                 offset = new_Const(mode, get_mode_one(mode));
1264         }
1265
1266         switch(expression->expression.kind) {
1267         case EXPR_UNARY_POSTFIX_INCREMENT: {
1268                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1269                 set_value_for_expression(value, new_value);
1270                 return value_node;
1271         }
1272         case EXPR_UNARY_POSTFIX_DECREMENT: {
1273                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1274                 set_value_for_expression(value, new_value);
1275                 return value_node;
1276         }
1277         case EXPR_UNARY_PREFIX_INCREMENT: {
1278                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1279                 set_value_for_expression(value, new_value);
1280                 return new_value;
1281         }
1282         case EXPR_UNARY_PREFIX_DECREMENT: {
1283                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1284                 set_value_for_expression(value, new_value);
1285                 return new_value;
1286         }
1287         default:
1288                 panic("no incdec expr in create_incdec");
1289                 return NULL;
1290         }
1291 }
1292
1293 static bool is_local_variable(expression_t *expression)
1294 {
1295         if (expression->kind != EXPR_REFERENCE)
1296                 return false;
1297         reference_expression_t *ref_expr    = &expression->reference;
1298         declaration_t          *declaration = ref_expr->declaration;
1299         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1300 }
1301
1302 static pn_Cmp get_pnc(const expression_kind_t kind)
1303 {
1304         switch(kind) {
1305         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1306         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1307         case EXPR_BINARY_NOTEQUAL:      return pn_Cmp_Ne;
1308         case EXPR_BINARY_ISLESS:
1309         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1310         case EXPR_BINARY_ISLESSEQUAL:
1311         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1312         case EXPR_BINARY_ISGREATER:
1313         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1314         case EXPR_BINARY_ISGREATEREQUAL:
1315         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1316         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1317
1318         default:
1319                 break;
1320         }
1321         panic("trying to get pn_Cmp from non-comparison binexpr type");
1322 }
1323
1324 /**
1325  * Handle the assume optimizer hint: check if a Confirm
1326  * node can be created.
1327  *
1328  * @param dbi    debug info
1329  * @param expr   the IL assume expression
1330  *
1331  * we support here only some simple cases:
1332  *  - var rel const
1333  *  - const rel val
1334  *  - var rel var
1335  */
1336 static ir_node *handle_assume_compare(dbg_info *dbi, const binary_expression_t *expression)
1337 {
1338         expression_t  *op1 = expression->left;
1339         expression_t  *op2 = expression->right;
1340         declaration_t *var2, *var = NULL;
1341         ir_node       *res = NULL;
1342         pn_Cmp         cmp_val;
1343
1344         cmp_val = get_pnc(expression->expression.kind);
1345
1346         if (is_local_variable(op1) && is_local_variable(op2)) {
1347         var  = op1->reference.declaration;
1348             var2 = op2->reference.declaration;
1349
1350                 type_t  *const type = skip_typeref(var->type);
1351                 ir_mode *const mode = get_ir_mode(type);
1352
1353                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1354                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1355
1356                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1357                 set_value(var2->v.value_number, res);
1358
1359                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1360                 set_value(var->v.value_number, res);
1361
1362                 return res;
1363         }
1364
1365         expression_t *con;
1366         if (is_local_variable(op1) && is_constant_expression(op2)) {
1367                 var = op1->reference.declaration;
1368                 con = op2;
1369         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1370                 cmp_val = get_inversed_pnc(cmp_val);
1371                 var = op2->reference.declaration;
1372                 con = op1;
1373         }
1374
1375         if (var != NULL) {
1376                 type_t  *const type = skip_typeref(var->type);
1377                 ir_mode *const mode = get_ir_mode(type);
1378
1379                 res = get_value(var->v.value_number, mode);
1380                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1381                 set_value(var->v.value_number, res);
1382         }
1383         return res;
1384 }
1385
1386 /**
1387  * Handle the assume optimizer hint.
1388  *
1389  * @param dbi    debug info
1390  * @param expr   the IL assume expression
1391  */
1392 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1393         switch(expression->kind) {
1394         case EXPR_BINARY_EQUAL:
1395         case EXPR_BINARY_NOTEQUAL:
1396         case EXPR_BINARY_LESS:
1397         case EXPR_BINARY_LESSEQUAL:
1398         case EXPR_BINARY_GREATER:
1399         case EXPR_BINARY_GREATEREQUAL:
1400                 return handle_assume_compare(dbi, &expression->binary);
1401         default:
1402                 return NULL;
1403         }
1404 }
1405
1406 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1407 {
1408         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1409         type_t   *type = skip_typeref(expression->expression.datatype);
1410
1411         if(expression->expression.kind == EXPR_UNARY_TAKE_ADDRESS)
1412                 return expression_to_addr(expression->value);
1413
1414         const expression_t *value = expression->value;
1415
1416         switch(expression->expression.kind) {
1417         case EXPR_UNARY_NEGATE: {
1418                 ir_node *value_node = expression_to_firm(value);
1419                 ir_mode *mode = get_ir_mode(type);
1420                 return new_d_Minus(dbgi, value_node, mode);
1421         }
1422         case EXPR_UNARY_PLUS:
1423                 return expression_to_firm(value);
1424         case EXPR_UNARY_BITWISE_NEGATE: {
1425                 ir_node *value_node = expression_to_firm(value);
1426                 ir_mode *mode = get_ir_mode(type);
1427                 return new_d_Not(dbgi, value_node, mode);
1428         }
1429         case EXPR_UNARY_NOT: {
1430                 ir_node *value_node = expression_to_firm(value);
1431                 ir_mode *mode = get_ir_mode(type);
1432                 if(get_irn_mode(value_node) != mode_b) {
1433                         value_node = create_conv(dbgi, value_node, mode_b);
1434                 }
1435                 value_node = new_d_Not(dbgi, value_node, mode_b);
1436                 if(mode != mode_b) {
1437                         value_node = create_conv(dbgi, value_node, mode);
1438                 }
1439                 return value_node;
1440         }
1441         case EXPR_UNARY_DEREFERENCE: {
1442                 ir_node *value_node = expression_to_firm(value);
1443                 type_t  *value_type = skip_typeref(value->base.datatype);
1444                 ir_type *irtype     = get_ir_type(value_type);
1445                 assert(is_Pointer_type(irtype));
1446                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1447                 return deref_address(points_to, value_node, dbgi);
1448         }
1449         case EXPR_UNARY_POSTFIX_INCREMENT:
1450         case EXPR_UNARY_POSTFIX_DECREMENT:
1451         case EXPR_UNARY_PREFIX_INCREMENT:
1452         case EXPR_UNARY_PREFIX_DECREMENT:
1453                 return create_incdec(expression);
1454         case EXPR_UNARY_CAST: {
1455                 ir_node *value_node = expression_to_firm(value);
1456                 ir_mode *mode = get_ir_mode(type);
1457                 ir_node *node = create_conv(dbgi, value_node, mode);
1458                 node = do_strict_conv(dbgi, node);
1459                 return node;
1460         }
1461         case EXPR_UNARY_CAST_IMPLICIT: {
1462                 ir_node *value_node = expression_to_firm(value);
1463                 ir_mode *mode = get_ir_mode(type);
1464                 return create_conv(dbgi, value_node, mode);
1465         }
1466         case EXPR_UNARY_ASSUME:
1467                 if(firm_opt.confirm)
1468                         return handle_assume(dbgi, value);
1469                 else
1470                         return NULL;
1471
1472         default:
1473                 break;
1474         }
1475         panic("invalid UNEXPR type found");
1476 }
1477
1478 static ir_node *create_lazy_op(const binary_expression_t *expression)
1479 {
1480         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1481         type_t   *type = expression->expression.datatype;
1482         ir_mode  *mode = get_ir_mode(type);
1483
1484         if(is_constant_expression(expression->left)) {
1485                 long val = fold_constant(expression->left);
1486                 expression_kind_t ekind = expression->expression.kind;
1487                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1488                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1489                         return expression_to_firm(expression->right);
1490                 } else {
1491                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1492                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1493                         return new_Const(mode, get_mode_one(mode));
1494                 }
1495         }
1496
1497         ir_node *cur_block = get_cur_block();
1498
1499         ir_node *one_block = new_immBlock();
1500         ir_node *one       = new_Const(mode, get_mode_one(mode));
1501         ir_node *jmp_one   = new_d_Jmp(dbgi);
1502
1503         ir_node *zero_block = new_immBlock();
1504         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1505         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1506
1507         set_cur_block(cur_block);
1508         create_condition_evaluation((const expression_t*) expression,
1509                                     one_block, zero_block);
1510         mature_immBlock(one_block);
1511         mature_immBlock(zero_block);
1512
1513         ir_node *common_block = new_immBlock();
1514         add_immBlock_pred(common_block, jmp_one);
1515         add_immBlock_pred(common_block, jmp_zero);
1516         mature_immBlock(common_block);
1517
1518         ir_node *in[2] = { one, zero };
1519         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1520
1521         return val;
1522 }
1523
1524 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1525                                             ir_node *right, ir_mode *mode);
1526
1527 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1528                                         create_arithmetic_func func)
1529 {
1530         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1531         ir_node  *left  = expression_to_firm(expression->left);
1532         ir_node  *right = expression_to_firm(expression->right);
1533         type_t   *type  = expression->right->base.datatype;
1534         /* be careful with the modes, because in arithmetic assign nodes only
1535          * the right operand has the mode of the arithmetic already */
1536         ir_mode  *mode  = get_ir_mode(type);
1537         left            = create_conv(dbgi, left, mode);
1538         ir_node  *res   = func(dbgi, left, right, mode);
1539
1540         return res;
1541 }
1542
1543 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1544                                    ir_node  *      integer,
1545                                    type_t   *const type,
1546                                    dbg_info *const dbgi,
1547                                    const create_arithmetic_func func)
1548 {
1549         pointer_type_t *const pointer_type = &type->pointer;
1550         type_t         *const points_to    = pointer_type->points_to;
1551         const unsigned        elem_size    = get_type_size(points_to);
1552
1553         assert(elem_size >= 1);
1554         if (elem_size > 1) {
1555                 integer             = create_conv(dbgi, integer, mode_int);
1556                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1557                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
1558                 integer = mul;
1559         }
1560
1561         ir_mode *const mode = get_ir_mode(type);
1562         return func(dbgi, pointer, integer, mode);
1563 }
1564
1565 static ir_node *create_arithmetic_assign_binop(
1566                 const binary_expression_t *expression, create_arithmetic_func func)
1567 {
1568         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1569         type_t   *const type = skip_typeref(expression->expression.datatype);
1570         ir_node  *value;
1571
1572         if (is_type_pointer(type)) {
1573                 ir_node *const pointer = expression_to_firm(expression->left);
1574                 ir_node *      integer = expression_to_firm(expression->right);
1575                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1576         } else {
1577                 value = create_arithmetic_binop(expression, func);
1578         }
1579
1580         ir_mode *const mode = get_ir_mode(type);
1581         value = create_conv(dbgi, value, mode);
1582         set_value_for_expression(expression->left, value);
1583
1584         return value;
1585 }
1586
1587 static ir_node *create_add(const binary_expression_t *expression)
1588 {
1589         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1590         ir_node  *left  = expression_to_firm(expression->left);
1591         ir_node  *right = expression_to_firm(expression->right);
1592         type_t   *type  = expression->expression.datatype;
1593
1594         expression_t *expr_left  = expression->left;
1595         expression_t *expr_right = expression->right;
1596         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1597         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1598
1599         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1600                 ir_mode *const mode = get_ir_mode(type);
1601                 return new_d_Add(dbgi, left, right, mode);
1602         }
1603
1604         if (is_type_pointer(type_left)) {
1605                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1606         } else {
1607                 assert(is_type_pointer(type_right));
1608                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1609         }
1610 }
1611
1612 static ir_node *create_sub(const binary_expression_t *expression)
1613 {
1614         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1615         expression_t *const expr_left  = expression->left;
1616         expression_t *const expr_right = expression->right;
1617         ir_node      *const left       = expression_to_firm(expr_left);
1618         ir_node      *const right      = expression_to_firm(expr_right);
1619         type_t       *const type       = expression->expression.datatype;
1620         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1621         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1622
1623         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1624                 ir_mode *const mode = get_ir_mode(type);
1625                 return new_d_Sub(dbgi, left, right, mode);
1626         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
1627                 const pointer_type_t *const ptr_type = &type_left->pointer;
1628                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1629                 ir_mode *const mode   = get_ir_mode(type);
1630                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1631                 ir_node *const cnst   = new_Const_long(mode_int, (long)elem_size);
1632                 ir_node *const no_mem = new_NoMem();
1633                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1634                                                   op_pin_state_floats);
1635                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1636         }
1637
1638         assert(is_type_pointer(type_left));
1639         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1640 }
1641
1642 static ir_node *create_shift(const binary_expression_t *expression)
1643 {
1644         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1645         ir_node  *left  = expression_to_firm(expression->left);
1646         ir_node  *right = expression_to_firm(expression->right);
1647         type_t   *type  = expression->expression.datatype;
1648         ir_mode  *mode  = get_ir_mode(type);
1649
1650         /* firm always wants the shift count to be unsigned */
1651         right = create_conv(dbgi, right, mode_uint);
1652
1653         ir_node *res;
1654
1655         switch(expression->expression.kind) {
1656         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1657         case EXPR_BINARY_SHIFTLEFT:
1658                 res = new_d_Shl(dbgi, left, right, mode);
1659                 break;
1660         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1661         case EXPR_BINARY_SHIFTRIGHT: {
1662                  expression_t *expr_left = expression->left;
1663                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1664
1665                  if(is_type_signed(type_left)) {
1666                         res = new_d_Shrs(dbgi, left, right, mode);
1667                  } else {
1668                          res = new_d_Shr(dbgi, left, right, mode);
1669                  }
1670                  break;
1671         }
1672         default:
1673                 panic("create shift op called for non-shift op");
1674         }
1675
1676         return res;
1677 }
1678
1679
1680 static ir_node *create_divmod(const binary_expression_t *expression)
1681 {
1682         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1683         ir_node  *left  = expression_to_firm(expression->left);
1684         ir_node  *right = expression_to_firm(expression->right);
1685         ir_node  *pin   = new_Pin(new_NoMem());
1686         /* be careful with the modes, because in arithmetic assign nodes only
1687          * the right operand has the mode of the arithmetic already */
1688         type_t   *type  = expression->right->base.datatype;
1689         ir_mode  *mode  = get_ir_mode(type);
1690         left            = create_conv(dbgi, left, mode);
1691         ir_node  *op;
1692         ir_node  *res;
1693
1694         switch (expression->expression.kind) {
1695         case EXPR_BINARY_DIV:
1696         case EXPR_BINARY_DIV_ASSIGN:
1697                 if(mode_is_float(mode)) {
1698                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1699                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1700                 } else {
1701                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1702                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1703                 }
1704                 break;
1705
1706         case EXPR_BINARY_MOD:
1707         case EXPR_BINARY_MOD_ASSIGN:
1708                 assert(!mode_is_float(mode));
1709                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1710                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1711                 break;
1712
1713         default: panic("unexpected binary expression type in create_divmod()");
1714         }
1715
1716         return res;
1717 }
1718
1719 static ir_node *create_arithmetic_assign_divmod(
1720                 const binary_expression_t *expression)
1721 {
1722         ir_node  *      value = create_divmod(expression);
1723         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1724         type_t   *const type  = expression->expression.datatype;
1725         ir_mode  *const mode  = get_ir_mode(type);
1726
1727         assert(type->kind != TYPE_POINTER);
1728
1729         value = create_conv(dbgi, value, mode);
1730         set_value_for_expression(expression->left, value);
1731
1732         return value;
1733 }
1734
1735 static ir_node *create_arithmetic_assign_shift(
1736                 const binary_expression_t *expression)
1737 {
1738         ir_node  *      value = create_shift(expression);
1739         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1740         type_t   *const type  = expression->expression.datatype;
1741         ir_mode  *const mode  = get_ir_mode(type);
1742
1743         value = create_conv(dbgi, value, mode);
1744         set_value_for_expression(expression->left, value);
1745
1746         return value;
1747 }
1748
1749 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1750 {
1751         expression_kind_t kind = expression->expression.kind;
1752
1753         switch(kind) {
1754         case EXPR_BINARY_EQUAL:
1755         case EXPR_BINARY_NOTEQUAL:
1756         case EXPR_BINARY_LESS:
1757         case EXPR_BINARY_LESSEQUAL:
1758         case EXPR_BINARY_GREATER:
1759         case EXPR_BINARY_GREATEREQUAL:
1760         case EXPR_BINARY_ISGREATER:
1761         case EXPR_BINARY_ISGREATEREQUAL:
1762         case EXPR_BINARY_ISLESS:
1763         case EXPR_BINARY_ISLESSEQUAL:
1764         case EXPR_BINARY_ISLESSGREATER:
1765         case EXPR_BINARY_ISUNORDERED: {
1766                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1767                 ir_node *left  = expression_to_firm(expression->left);
1768                 ir_node *right = expression_to_firm(expression->right);
1769                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1770                 long     pnc   = get_pnc(kind);
1771                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1772                 return proj;
1773         }
1774         case EXPR_BINARY_ASSIGN: {
1775                 ir_node *right = expression_to_firm(expression->right);
1776                 set_value_for_expression(expression->left, right);
1777
1778                 return right;
1779         }
1780         case EXPR_BINARY_ADD:
1781                 return create_add(expression);
1782         case EXPR_BINARY_SUB:
1783                 return create_sub(expression);
1784         case EXPR_BINARY_MUL:
1785                 return create_arithmetic_binop(expression, new_d_Mul);
1786         case EXPR_BINARY_BITWISE_AND:
1787                 return create_arithmetic_binop(expression, new_d_And);
1788         case EXPR_BINARY_BITWISE_OR:
1789                 return create_arithmetic_binop(expression, new_d_Or);
1790         case EXPR_BINARY_BITWISE_XOR:
1791                 return create_arithmetic_binop(expression, new_d_Eor);
1792         case EXPR_BINARY_SHIFTLEFT:
1793         case EXPR_BINARY_SHIFTRIGHT:
1794                 return create_shift(expression);
1795         case EXPR_BINARY_DIV:
1796         case EXPR_BINARY_MOD:
1797                 return create_divmod(expression);
1798         case EXPR_BINARY_LOGICAL_AND:
1799         case EXPR_BINARY_LOGICAL_OR:
1800                 return create_lazy_op(expression);
1801         case EXPR_BINARY_COMMA:
1802                 expression_to_firm(expression->left);
1803                 return expression_to_firm(expression->right);
1804         case EXPR_BINARY_ADD_ASSIGN:
1805                 return create_arithmetic_assign_binop(expression, new_d_Add);
1806         case EXPR_BINARY_SUB_ASSIGN:
1807                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1808         case EXPR_BINARY_MUL_ASSIGN:
1809                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1810         case EXPR_BINARY_DIV_ASSIGN:
1811                 return create_arithmetic_assign_divmod(expression);
1812         case EXPR_BINARY_BITWISE_AND_ASSIGN:
1813                 return create_arithmetic_assign_binop(expression, new_d_And);
1814         case EXPR_BINARY_BITWISE_OR_ASSIGN:
1815                 return create_arithmetic_assign_binop(expression, new_d_Or);
1816         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1817                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1818         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1819         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1820                 return create_arithmetic_assign_shift(expression);
1821         case EXPR_BINARY_BUILTIN_EXPECT:
1822                 return expression_to_firm(expression->left);
1823         default:
1824                 panic("TODO binexpr type");
1825         }
1826 }
1827
1828 static ir_node *array_access_addr(const array_access_expression_t *expression)
1829 {
1830         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1831         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1832         ir_node  *offset    = expression_to_firm(expression->index);
1833         offset              = create_conv(dbgi, offset, mode_uint);
1834
1835         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1836         assert(is_type_pointer(ref_type));
1837         pointer_type_t *pointer_type = &ref_type->pointer;
1838
1839         unsigned elem_size       = get_type_size(pointer_type->points_to);
1840         ir_node *elem_size_const = new_Const_long(mode_uint, elem_size);
1841         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1842                                              mode_uint);
1843         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
1844
1845         return result;
1846 }
1847
1848 static ir_node *array_access_to_firm(
1849                 const array_access_expression_t *expression)
1850 {
1851         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1852         ir_node  *addr   = array_access_addr(expression);
1853         type_t   *type   = revert_automatic_type_conversion(
1854                         (const expression_t*) expression);
1855         type             = skip_typeref(type);
1856         ir_type  *irtype = get_ir_type(type);
1857
1858         return deref_address(irtype, addr, dbgi);
1859 }
1860
1861 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1862 {
1863         type_t *type = expression->type;
1864         if(type == NULL) {
1865                 type = expression->size_expression->base.datatype;
1866                 assert(type != NULL);
1867         }
1868
1869         ir_mode *const mode = get_ir_mode(expression->expression.datatype);
1870         symconst_symbol sym;
1871         sym.type_p = get_ir_type(type);
1872         return new_SymConst(mode, sym, symconst_type_size);
1873 }
1874
1875 static ir_node *alignof_to_firm(const alignof_expression_t *expression)
1876 {
1877         type_t *const  type = expression->type;
1878         ir_mode *const mode = get_ir_mode(expression->expression.datatype);
1879         symconst_symbol sym;
1880         sym.type_p = get_ir_type(type);
1881         return new_SymConst(mode, sym, symconst_type_align);
1882 }
1883
1884 static long fold_constant(const expression_t *expression)
1885 {
1886         assert(is_constant_expression(expression));
1887
1888         ir_graph *old_current_ir_graph = current_ir_graph;
1889         if(current_ir_graph == NULL) {
1890                 current_ir_graph = get_const_code_irg();
1891         }
1892
1893         ir_node *cnst = expression_to_firm(expression);
1894         current_ir_graph = old_current_ir_graph;
1895
1896         if(!is_Const(cnst)) {
1897                 panic("couldn't fold constant\n");
1898         }
1899
1900         tarval *tv = get_Const_tarval(cnst);
1901         if(!tarval_is_long(tv)) {
1902                 panic("result of constant folding is not integer\n");
1903         }
1904
1905         return get_tarval_long(tv);
1906 }
1907
1908 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1909 {
1910         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1911
1912         /* first try to fold a constant condition */
1913         if(is_constant_expression(expression->condition)) {
1914                 long val = fold_constant(expression->condition);
1915                 if(val) {
1916                         return expression_to_firm(expression->true_expression);
1917                 } else {
1918                         return expression_to_firm(expression->false_expression);
1919                 }
1920         }
1921
1922         ir_node *cur_block   = get_cur_block();
1923
1924         /* create the true block */
1925         ir_node *true_block  = new_immBlock();
1926
1927         ir_node *true_val = expression_to_firm(expression->true_expression);
1928         ir_node *true_jmp = new_Jmp();
1929
1930         /* create the false block */
1931         ir_node *false_block = new_immBlock();
1932
1933         ir_node *false_val = expression_to_firm(expression->false_expression);
1934         ir_node *false_jmp = new_Jmp();
1935
1936         /* create the condition evaluation */
1937         set_cur_block(cur_block);
1938         create_condition_evaluation(expression->condition, true_block, false_block);
1939         mature_immBlock(true_block);
1940         mature_immBlock(false_block);
1941
1942         /* create the common block */
1943         ir_node *common_block = new_immBlock();
1944         add_immBlock_pred(common_block, true_jmp);
1945         add_immBlock_pred(common_block, false_jmp);
1946         mature_immBlock(common_block);
1947
1948         /* TODO improve static semantics, so either both or no values are NULL */
1949         if (true_val == NULL || false_val == NULL)
1950                 return NULL;
1951
1952         ir_node *in[2] = { true_val, false_val };
1953         ir_mode *mode  = get_irn_mode(true_val);
1954         assert(get_irn_mode(false_val) == mode);
1955         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1956
1957         return val;
1958 }
1959
1960 static ir_node *select_addr(const select_expression_t *expression)
1961 {
1962         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1963
1964         ir_node *compound_addr = expression_to_firm(expression->compound);
1965
1966         declaration_t *entry = expression->compound_entry;
1967         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
1968         ir_entity     *entity = entry->v.entity;
1969
1970         assert(entity != NULL);
1971
1972         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1973
1974         return sel;
1975 }
1976
1977 static ir_node *select_to_firm(const select_expression_t *expression)
1978 {
1979         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1980         ir_node  *addr   = select_addr(expression);
1981         type_t   *type   = revert_automatic_type_conversion(
1982                         (const expression_t*) expression);
1983         type             = skip_typeref(type);
1984         ir_type  *irtype = get_ir_type(type);
1985
1986         return deref_address(irtype, addr, dbgi);
1987 }
1988
1989 /* Values returned by __builtin_classify_type. */
1990 typedef enum gcc_type_class
1991 {
1992         no_type_class = -1,
1993         void_type_class,
1994         integer_type_class,
1995         char_type_class,
1996         enumeral_type_class,
1997         boolean_type_class,
1998         pointer_type_class,
1999         reference_type_class,
2000         offset_type_class,
2001         real_type_class,
2002         complex_type_class,
2003         function_type_class,
2004         method_type_class,
2005         record_type_class,
2006         union_type_class,
2007         array_type_class,
2008         string_type_class,
2009         set_type_class,
2010         file_type_class,
2011         lang_type_class
2012 } gcc_type_class;
2013
2014 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2015 {
2016         const type_t *const type = expr->type_expression->base.datatype;
2017
2018         gcc_type_class tc;
2019         switch (type->kind)
2020         {
2021                 case TYPE_ATOMIC: {
2022                         const atomic_type_t *const atomic_type = &type->atomic;
2023                         switch (atomic_type->atype) {
2024                                 /* should not be reached */
2025                                 case ATOMIC_TYPE_INVALID:
2026                                         tc = no_type_class;
2027                                         break;
2028
2029                                 /* gcc cannot do that */
2030                                 case ATOMIC_TYPE_VOID:
2031                                         tc = void_type_class;
2032                                         break;
2033
2034                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2035                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2036                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2037                                 case ATOMIC_TYPE_SHORT:
2038                                 case ATOMIC_TYPE_USHORT:
2039                                 case ATOMIC_TYPE_INT:
2040                                 case ATOMIC_TYPE_UINT:
2041                                 case ATOMIC_TYPE_LONG:
2042                                 case ATOMIC_TYPE_ULONG:
2043                                 case ATOMIC_TYPE_LONGLONG:
2044                                 case ATOMIC_TYPE_ULONGLONG:
2045                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2046                                         tc = integer_type_class;
2047                                         break;
2048
2049                                 case ATOMIC_TYPE_FLOAT:
2050                                 case ATOMIC_TYPE_DOUBLE:
2051                                 case ATOMIC_TYPE_LONG_DOUBLE:
2052                                         tc = real_type_class;
2053                                         break;
2054
2055 #ifdef PROVIDE_COMPLEX
2056                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
2057                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
2058                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
2059                                         tc = complex_type_class;
2060                                         break;
2061                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
2062                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
2063                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
2064                                         tc = complex_type_class;
2065                                         break;
2066 #endif
2067
2068                                 default:
2069                                         panic("Unimplemented case in classify_type_to_firm().");
2070                         }
2071                         break;
2072                 }
2073
2074                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2075                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2076                 case TYPE_POINTER:         tc = pointer_type_class; break;
2077                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
2078                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
2079
2080                 /* gcc handles this as integer */
2081                 case TYPE_ENUM:            tc = integer_type_class; break;
2082
2083                 default:
2084                         panic("Unimplemented case in classify_type_to_firm().");
2085         }
2086
2087         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
2088         ir_mode  *const mode = mode_int;
2089         tarval   *const tv   = new_tarval_from_long(tc, mode);
2090         return new_d_Const(dbgi, mode, tv);
2091 }
2092
2093 static ir_node *function_name_to_firm(
2094                 const string_literal_expression_t *const expr)
2095 {
2096         if (current_function_name == NULL) {
2097                 const source_position_t *const src_pos =
2098                         &expr->expression.source_position;
2099                 const char *const name = current_function_decl->symbol->string;
2100                 current_function_name = string_to_firm(src_pos, "__func__", name);
2101         }
2102
2103         return current_function_name;
2104 }
2105
2106 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2107 {
2108         statement_t *statement = expr->statement;
2109
2110         assert(statement->kind == STATEMENT_COMPOUND);
2111         return compound_statement_to_firm(&statement->compound);
2112 }
2113
2114 static ir_node *va_start_expression_to_firm(
2115         const va_start_expression_t *const expr)
2116 {
2117         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2118         int        const n           = get_method_n_params(method_type) - 1;
2119         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2120         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2121         dbg_info  *const dbgi        =
2122                 get_dbg_info(&expr->expression.source_position);
2123         ir_node   *const no_mem      = new_NoMem();
2124         ir_node   *const arg_sel     =
2125                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2126
2127         size_t     const parm_size   = get_type_size(expr->parameter->type);
2128         ir_node   *const cnst        = new_Const_long(mode_uint, parm_size);
2129         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2130         set_value_for_expression(expr->ap, add);
2131
2132         return NULL;
2133 }
2134
2135 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2136 {
2137         ir_type  *const irtype = get_ir_type(expr->expression.datatype);
2138         ir_node  *const ap     = expression_to_firm(expr->ap);
2139         dbg_info *const dbgi   = get_dbg_info(&expr->expression.source_position);
2140         ir_node  *const res    = deref_address(irtype, ap, dbgi);
2141
2142         size_t    const parm_size = get_type_size(expr->expression.datatype);
2143         ir_node  *const cnst      = new_Const_long(mode_uint, parm_size);
2144         ir_node  *const add       = new_d_Add(dbgi, ap, cnst, mode_P_data);
2145         set_value_for_expression(expr->ap, add);
2146
2147         return res;
2148 }
2149
2150 static ir_node *dereference_addr(const unary_expression_t *const expression)
2151 {
2152         assert(expression->expression.kind == EXPR_UNARY_DEREFERENCE);
2153         return expression_to_firm(expression->value);
2154 }
2155
2156 static ir_node *expression_to_addr(const expression_t *expression)
2157 {
2158         switch(expression->kind) {
2159         case EXPR_REFERENCE:
2160                 return reference_addr(&expression->reference);
2161         case EXPR_ARRAY_ACCESS:
2162                 return array_access_addr(&expression->array_access);
2163         case EXPR_SELECT:
2164                 return select_addr(&expression->select);
2165         case EXPR_CALL:
2166                 return call_expression_to_firm(&expression->call);
2167         case EXPR_UNARY_DEREFERENCE: {
2168                 return dereference_addr(&expression->unary);
2169         }
2170         default:
2171                 break;
2172         }
2173         panic("trying to get address of non-lvalue");
2174 }
2175
2176 static ir_node *builtin_constant_to_firm(const builtin_constant_expression_t *expression)
2177 {
2178         ir_mode *mode = get_ir_mode(expression->expression.datatype);
2179         long     v;
2180
2181         if (is_constant_expression(expression->value)) {
2182                 v = 1;
2183         } else {
2184                 v = 0;
2185         }
2186         return new_Const_long(mode, v);
2187 }
2188
2189 static ir_node *_expression_to_firm(const expression_t *expression)
2190 {
2191         switch(expression->kind) {
2192         case EXPR_CONST:
2193                 return const_to_firm(&expression->conste);
2194         case EXPR_STRING_LITERAL:
2195                 return string_literal_to_firm(&expression->string);
2196         case EXPR_WIDE_STRING_LITERAL:
2197                 return wide_string_literal_to_firm(&expression->wide_string);
2198         case EXPR_REFERENCE:
2199                 return reference_expression_to_firm(&expression->reference);
2200         case EXPR_CALL:
2201                 return call_expression_to_firm(&expression->call);
2202         EXPR_UNARY_CASES
2203                 return unary_expression_to_firm(&expression->unary);
2204         EXPR_BINARY_CASES
2205                 return binary_expression_to_firm(&expression->binary);
2206         case EXPR_ARRAY_ACCESS:
2207                 return array_access_to_firm(&expression->array_access);
2208         case EXPR_SIZEOF:
2209                 return sizeof_to_firm(&expression->sizeofe);
2210         case EXPR_ALIGNOF:
2211                 return alignof_to_firm(&expression->alignofe);
2212         case EXPR_CONDITIONAL:
2213                 return conditional_to_firm(&expression->conditional);
2214         case EXPR_SELECT:
2215                 return select_to_firm(&expression->select);
2216         case EXPR_CLASSIFY_TYPE:
2217                 return classify_type_to_firm(&expression->classify_type);
2218         case EXPR_FUNCTION:
2219         case EXPR_PRETTY_FUNCTION:
2220                 return function_name_to_firm(&expression->string);
2221         case EXPR_STATEMENT:
2222                 return statement_expression_to_firm(&expression->statement);
2223         case EXPR_VA_START:
2224                 return va_start_expression_to_firm(&expression->va_starte);
2225         case EXPR_VA_ARG:
2226                 return va_arg_expression_to_firm(&expression->va_arge);
2227         case EXPR_OFFSETOF:
2228         case EXPR_BUILTIN_SYMBOL:
2229                 panic("unimplemented expression found");
2230         case EXPR_BUILTIN_CONSTANT_P:
2231                 return builtin_constant_to_firm(&expression->builtin_constant);
2232
2233         case EXPR_UNKNOWN:
2234         case EXPR_INVALID:
2235                 break;
2236         }
2237         panic("invalid expression found");
2238 }
2239
2240 static ir_node *expression_to_firm(const expression_t *expression)
2241 {
2242         ir_node *res = _expression_to_firm(expression);
2243
2244         if(res != NULL && get_irn_mode(res) == mode_b) {
2245                 ir_mode *mode = get_ir_mode(expression->base.datatype);
2246                 res           = create_conv(NULL, res, mode);
2247         }
2248
2249         return res;
2250 }
2251
2252 static ir_node *expression_to_modeb(const expression_t *expression)
2253 {
2254         ir_node *res = _expression_to_firm(expression);
2255         res          = create_conv(NULL, res, mode_b);
2256
2257         return res;
2258 }
2259
2260 /**
2261  * create a short-circuit expression evaluation that tries to construct
2262  * efficient control flow structures for &&, || and ! expressions
2263  */
2264 static void create_condition_evaluation(const expression_t *expression,
2265                                         ir_node *true_block,
2266                                         ir_node *false_block)
2267 {
2268         switch(expression->kind) {
2269         case EXPR_UNARY_NOT: {
2270                 const unary_expression_t *unary_expression = &expression->unary;
2271                 create_condition_evaluation(unary_expression->value, false_block,
2272                                             true_block);
2273                 return;
2274         }
2275         case EXPR_BINARY_LOGICAL_AND: {
2276                 const binary_expression_t *binary_expression = &expression->binary;
2277
2278                 ir_node *cur_block   = get_cur_block();
2279                 ir_node *extra_block = new_immBlock();
2280                 set_cur_block(cur_block);
2281                 create_condition_evaluation(binary_expression->left, extra_block,
2282                                             false_block);
2283                 mature_immBlock(extra_block);
2284                 set_cur_block(extra_block);
2285                 create_condition_evaluation(binary_expression->right, true_block,
2286                                             false_block);
2287                 return;
2288         }
2289         case EXPR_BINARY_LOGICAL_OR: {
2290                 const binary_expression_t *binary_expression = &expression->binary;
2291
2292                 ir_node *cur_block   = get_cur_block();
2293                 ir_node *extra_block = new_immBlock();
2294                 set_cur_block(cur_block);
2295                 create_condition_evaluation(binary_expression->left, true_block,
2296                                             extra_block);
2297                 mature_immBlock(extra_block);
2298                 set_cur_block(extra_block);
2299                 create_condition_evaluation(binary_expression->right, true_block,
2300                                             false_block);
2301                 return;
2302         }
2303         default:
2304                 break;
2305         }
2306
2307         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2308         ir_node  *condition  = expression_to_modeb(expression);
2309         ir_node  *cond       = new_d_Cond(dbgi, condition);
2310         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2311         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2312
2313         /* set branch prediction info based on __builtin_expect */
2314         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2315                 long               cnst = fold_constant(expression->binary.right);
2316                 cond_jmp_predicate pred;
2317
2318                 if(cnst == 0) {
2319                         pred = COND_JMP_PRED_FALSE;
2320                 } else {
2321                         pred = COND_JMP_PRED_TRUE;
2322                 }
2323                 set_Cond_jmp_pred(cond, pred);
2324         }
2325
2326         add_immBlock_pred(true_block, true_proj);
2327         add_immBlock_pred(false_block, false_proj);
2328
2329         set_cur_block(NULL);
2330 }
2331
2332
2333
2334 static void create_declaration_entity(declaration_t *declaration,
2335                                       declaration_kind_t declaration_kind,
2336                                       ir_type *parent_type)
2337 {
2338         ident     *const id     = new_id_from_str(declaration->symbol->string);
2339         ir_type   *const irtype = get_ir_type(declaration->type);
2340         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2341         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2342         set_entity_ld_ident(entity, id);
2343
2344         declaration->declaration_kind = (unsigned char) declaration_kind;
2345         declaration->v.entity         = entity;
2346         set_entity_variability(entity, variability_uninitialized);
2347         if(parent_type == get_tls_type())
2348                 set_entity_allocation(entity, allocation_automatic);
2349         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2350                 set_entity_allocation(entity, allocation_static);
2351         /* TODO: visibility? */
2352 }
2353
2354 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2355
2356 enum compound_graph_entry_type_t {
2357         COMPOUND_GRAPH_ENTRY_ARRAY,
2358         COMPOUND_GRAPH_ENTRY_COMPOUND
2359 };
2360
2361 struct compound_graph_path_entry_t {
2362         int type;
2363         union {
2364                 ir_entity *entity;
2365                 int        array_index;
2366         } v;
2367         compound_graph_path_entry_t *prev;
2368 };
2369
2370 static void create_initializer_object(initializer_t *initializer, type_t *type,
2371                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2372
2373 static compound_graph_path *create_compound_path(ir_type *type,
2374                 compound_graph_path_entry_t *entry, int len)
2375 {
2376         compound_graph_path *path = new_compound_graph_path(type, len);
2377
2378         int i = len - 1;
2379         for( ; entry != NULL; entry = entry->prev, --i) {
2380                 assert(i >= 0);
2381                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2382                         set_compound_graph_path_node(path, i, entry->v.entity);
2383                 } else {
2384                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2385                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2386                 }
2387         }
2388         assert(i == -1);
2389
2390         return path;
2391 }
2392
2393 static void create_initializer_value(initializer_value_t *initializer,
2394                                      ir_entity *entity,
2395                                      compound_graph_path_entry_t *entry,
2396                                      int len)
2397 {
2398         ir_node             *node = expression_to_firm(initializer->value);
2399         ir_type             *type = get_entity_type(entity);
2400         compound_graph_path *path = create_compound_path(type, entry, len);
2401         add_compound_ent_value_w_path(entity, node, path);
2402 }
2403
2404 static void create_initializer_compound(initializer_list_t *initializer,
2405                                         compound_type_t *type,
2406                                         ir_entity *entity,
2407                                         compound_graph_path_entry_t *last_entry,
2408                                         int len)
2409 {
2410         declaration_t *compound_declaration = type->declaration;
2411
2412         declaration_t *compound_entry = compound_declaration->context.declarations;
2413
2414         compound_graph_path_entry_t entry;
2415         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2416         entry.prev = last_entry;
2417         ++len;
2418
2419         size_t i = 0;
2420         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2421                 if(compound_entry->symbol == NULL)
2422                         continue;
2423                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2424                         continue;
2425
2426                 if(i >= initializer->len)
2427                         break;
2428
2429                 entry.v.entity = compound_entry->v.entity;
2430
2431                 initializer_t *sub_initializer = initializer->initializers[i];
2432
2433                 assert(compound_entry != NULL);
2434                 assert(compound_entry->declaration_kind
2435                                 == DECLARATION_KIND_COMPOUND_MEMBER);
2436
2437                 if(sub_initializer->kind == INITIALIZER_VALUE) {
2438                         create_initializer_value(&sub_initializer->value,
2439                                                  entity, &entry, len);
2440                 } else {
2441                         type_t *entry_type = skip_typeref(compound_entry->type);
2442                         create_initializer_object(sub_initializer, entry_type, entity,
2443                                                   &entry, len);
2444                 }
2445
2446                 ++i;
2447         }
2448 }
2449
2450 static void create_initializer_array(initializer_list_t *initializer,
2451                                      array_type_t *type, ir_entity *entity,
2452                                      compound_graph_path_entry_t *last_entry,
2453                                      int len)
2454 {
2455         type_t *element_type = type->element_type;
2456         element_type         = skip_typeref(element_type);
2457
2458         compound_graph_path_entry_t entry;
2459         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2460         entry.prev = last_entry;
2461         ++len;
2462
2463         size_t i;
2464         for(i = 0; i < initializer->len; ++i) {
2465                 entry.v.array_index = i;
2466
2467                 initializer_t *sub_initializer = initializer->initializers[i];
2468
2469                 if(sub_initializer->kind == INITIALIZER_VALUE) {
2470                         create_initializer_value(&sub_initializer->value,
2471                                                  entity, &entry, len);
2472                 } else {
2473                         create_initializer_object(sub_initializer, element_type, entity,
2474                                                   &entry, len);
2475                 }
2476         }
2477
2478 #if 0
2479         /* TODO: initialize rest... */
2480         if(type->size_expression != NULL) {
2481                 size_t array_len = fold_constant(type->size_expression);
2482                 for( ; i < array_len; ++i) {
2483
2484                 }
2485         }
2486 #endif
2487 }
2488
2489 static void create_initializer_string(initializer_string_t *initializer,
2490                                       array_type_t *type, ir_entity *entity,
2491                                       compound_graph_path_entry_t *last_entry,
2492                                       int len)
2493 {
2494         type_t *element_type = type->element_type;
2495         element_type         = skip_typeref(element_type);
2496
2497         compound_graph_path_entry_t entry;
2498         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2499         entry.prev = last_entry;
2500         ++len;
2501
2502         ir_type    *irtype  = get_entity_type(entity);
2503         size_t      arr_len = get_array_type_size(type);
2504         const char *p       = initializer->string;
2505         size_t      i       = 0;
2506         for(i = 0; i < arr_len; ++i, ++p) {
2507                 entry.v.array_index = i;
2508
2509                 ir_node             *node = new_Const_long(mode_Bs, *p);
2510                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2511                 add_compound_ent_value_w_path(entity, node, path);
2512
2513                 if(*p == '\0')
2514                         break;
2515         }
2516 }
2517
2518 static void create_initializer_wide_string(
2519         const initializer_wide_string_t *const initializer, array_type_t *const type,
2520         ir_entity *const entity, compound_graph_path_entry_t *const last_entry,
2521         int len)
2522 {
2523         type_t *element_type = type->element_type;
2524         element_type         = skip_typeref(element_type);
2525
2526         compound_graph_path_entry_t entry;
2527         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2528         entry.prev = last_entry;
2529         ++len;
2530
2531         ir_type           *const irtype  = get_entity_type(entity);
2532         const size_t             arr_len = get_array_type_size(type);
2533         const wchar_rep_t *      p       = initializer->string.begin;
2534         const wchar_rep_t *const end     = p + initializer->string.size;
2535         for (size_t i = 0; i < arr_len && p != end; ++i, ++p) {
2536                 entry.v.array_index = i;
2537
2538                 ir_node             *node = new_Const_long(mode_int, *p);
2539                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2540                 add_compound_ent_value_w_path(entity, node, path);
2541         }
2542 }
2543
2544 static void create_initializer_object(initializer_t *initializer, type_t *type,
2545                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2546 {
2547         if(is_type_array(type)) {
2548                 array_type_t *array_type = &type->array;
2549
2550                 switch (initializer->kind) {
2551                         case INITIALIZER_STRING: {
2552                                 initializer_string_t *const string = &initializer->string;
2553                                 create_initializer_string(string, array_type, entity, entry, len);
2554                                 return;
2555                         }
2556
2557                         case INITIALIZER_WIDE_STRING: {
2558                                 initializer_wide_string_t *const string = &initializer->wide_string;
2559                                 create_initializer_wide_string(string, array_type, entity, entry, len);
2560                                 return;
2561                         }
2562
2563                         case INITIALIZER_LIST: {
2564                                 initializer_list_t *const list = &initializer->list;
2565                                 create_initializer_array(list, array_type, entity, entry, len);
2566                                 return;
2567                         }
2568
2569                         case INITIALIZER_VALUE:
2570                                 break;
2571                 }
2572                 panic("Unhandled initializer");
2573         } else {
2574                 assert(initializer->kind == INITIALIZER_LIST);
2575                 initializer_list_t *list = &initializer->list;
2576
2577                 assert(is_type_compound(type));
2578                 compound_type_t *compound_type = &type->compound;
2579                 create_initializer_compound(list, compound_type, entity, entry, len);
2580         }
2581 }
2582
2583 static void create_initializer_local_variable_entity(declaration_t *declaration)
2584 {
2585         initializer_t *initializer = declaration->init.initializer;
2586         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2587         ir_entity     *entity      = declaration->v.entity;
2588         ir_node       *memory      = get_store();
2589         ir_node       *nomem       = new_NoMem();
2590         ir_node       *frame       = get_irg_frame(current_ir_graph);
2591         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2592
2593         if(initializer->kind == INITIALIZER_VALUE) {
2594                 initializer_value_t *initializer_value = &initializer->value;
2595
2596                 ir_node *value = expression_to_firm(initializer_value->value);
2597                 type_t  *type  = skip_typeref(declaration->type);
2598                 assign_value(dbgi, addr, type, value);
2599                 return;
2600         }
2601
2602         /* create a "template" entity which is copied to the entity on the stack */
2603         ident     *const id          = unique_ident("initializer");
2604         ir_type   *const irtype      = get_ir_type(declaration->type);
2605         ir_type   *const global_type = get_glob_type();
2606         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
2607         set_entity_ld_ident(init_entity, id);
2608
2609         set_entity_variability(init_entity, variability_initialized);
2610         set_entity_visibility(init_entity, visibility_local);
2611         set_entity_allocation(init_entity, allocation_static);
2612
2613         ir_graph *const old_current_ir_graph = current_ir_graph;
2614         current_ir_graph = get_const_code_irg();
2615
2616         type_t *const type = skip_typeref(declaration->type);
2617         create_initializer_object(initializer, type, init_entity, NULL, 0);
2618
2619         assert(current_ir_graph == get_const_code_irg());
2620         current_ir_graph = old_current_ir_graph;
2621
2622         ir_node *const src_addr  = create_symconst(dbgi, mode_P_data, init_entity);
2623         ir_node *const copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2624
2625         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2626         set_store(copyb_mem);
2627 }
2628
2629 static void create_initializer(declaration_t *declaration)
2630 {
2631         initializer_t *initializer = declaration->init.initializer;
2632         if(initializer == NULL)
2633                 return;
2634
2635         declaration_kind_t declaration_kind
2636                 = (declaration_kind_t) declaration->declaration_kind;
2637         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
2638                 create_initializer_local_variable_entity(declaration);
2639                 return;
2640         }
2641
2642         if(initializer->kind == INITIALIZER_VALUE) {
2643                 initializer_value_t *initializer_value = &initializer->value;
2644
2645                 ir_node *value = expression_to_firm(initializer_value->value);
2646
2647                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2648                         set_value(declaration->v.value_number, value);
2649                 } else {
2650                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
2651
2652                         ir_entity *entity = declaration->v.entity;
2653
2654                         set_entity_variability(entity, variability_initialized);
2655                         set_atomic_ent_value(entity, value);
2656                 }
2657         } else {
2658                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
2659                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
2660
2661                 ir_entity *entity = declaration->v.entity;
2662                 set_entity_variability(entity, variability_initialized);
2663
2664                 type_t *type = skip_typeref(declaration->type);
2665                 create_initializer_object(initializer, type, entity, NULL, 0);
2666         }
2667 }
2668
2669 static void create_local_variable(declaration_t *declaration)
2670 {
2671         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
2672
2673         bool needs_entity = declaration->address_taken;
2674         type_t *type = skip_typeref(declaration->type);
2675
2676         if(is_type_array(type) || is_type_compound(type)) {
2677                 needs_entity = true;
2678         }
2679
2680         if(needs_entity) {
2681                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2682                 create_declaration_entity(declaration,
2683                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
2684                                           frame_type);
2685         } else {
2686                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
2687                 declaration->v.value_number   = next_value_number_function;
2688                 ++next_value_number_function;
2689         }
2690
2691         create_initializer(declaration);
2692 }
2693
2694 static void create_local_static_variable(declaration_t *declaration)
2695 {
2696         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
2697
2698         type_t    *const type        = skip_typeref(declaration->type);
2699         ir_type   *const global_type = get_glob_type();
2700         ident     *const id          = unique_ident(declaration->symbol->string);
2701         ir_type   *const irtype      = get_ir_type(type);
2702         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
2703         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2704         set_entity_ld_ident(entity, id);
2705
2706         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
2707         declaration->v.entity         = entity;
2708         set_entity_variability(entity, variability_uninitialized);
2709         set_entity_visibility(entity, visibility_local);
2710         set_entity_allocation(entity, allocation_static);
2711
2712         ir_graph *const old_current_ir_graph = current_ir_graph;
2713         current_ir_graph = get_const_code_irg();
2714
2715         create_initializer(declaration);
2716
2717         assert(current_ir_graph == get_const_code_irg());
2718         current_ir_graph = old_current_ir_graph;
2719 }
2720
2721
2722
2723 static void return_statement_to_firm(return_statement_t *statement)
2724 {
2725         if(get_cur_block() == NULL)
2726                 return;
2727
2728         ir_type *func_irtype = get_ir_type(current_function_decl->type);
2729
2730         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
2731
2732         ir_node *in[1];
2733         int      in_len;
2734         if(get_method_n_ress(func_irtype) > 0) {
2735                 ir_type *res_type = get_method_res_type(func_irtype, 0);
2736
2737                 if(statement->return_value != NULL) {
2738                         ir_node *node = expression_to_firm(statement->return_value);
2739                         node  = do_strict_conv(dbgi, node);
2740                         in[0] = node;
2741                 } else {
2742                         ir_mode *mode;
2743                         if(is_compound_type(res_type)) {
2744                                 mode = mode_P_data;
2745                         } else {
2746                                 mode = get_type_mode(res_type);
2747                         }
2748                         in[0] = new_Unknown(mode);
2749                 }
2750                 in_len = 1;
2751         } else {
2752                 /* build return_value for its side effects */
2753                 if(statement->return_value != NULL) {
2754                         expression_to_firm(statement->return_value);
2755                 }
2756                 in_len = 0;
2757         }
2758
2759         ir_node  *store = get_store();
2760         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
2761
2762         ir_node *end_block = get_irg_end_block(current_ir_graph);
2763         add_immBlock_pred(end_block, ret);
2764
2765         set_cur_block(NULL);
2766 }
2767
2768 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
2769 {
2770         if(get_cur_block() == NULL)
2771                 return NULL;
2772
2773         return expression_to_firm(statement->expression);
2774 }
2775
2776 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
2777 {
2778         ir_node     *result    = NULL;
2779         statement_t *statement = compound->statements;
2780         for( ; statement != NULL; statement = statement->base.next) {
2781                 //context2firm(&statement->context);
2782
2783                 if(statement->base.next == NULL
2784                                 && statement->kind == STATEMENT_EXPRESSION) {
2785                         result = expression_statement_to_firm(
2786                                         &statement->expression);
2787                         break;
2788                 }
2789                 statement_to_firm(statement);
2790         }
2791
2792         return result;
2793 }
2794
2795 static void create_local_declaration(declaration_t *declaration)
2796 {
2797         type_t *type = skip_typeref(declaration->type);
2798
2799         switch ((storage_class_tag_t) declaration->storage_class) {
2800         case STORAGE_CLASS_STATIC:
2801                 create_local_static_variable(declaration);
2802                 return;
2803         case STORAGE_CLASS_ENUM_ENTRY:
2804                 panic("enum entry declaration in local block found");
2805         case STORAGE_CLASS_EXTERN:
2806                 panic("extern declaration in local block found");
2807         case STORAGE_CLASS_NONE:
2808         case STORAGE_CLASS_AUTO:
2809         case STORAGE_CLASS_REGISTER:
2810                 if(is_type_function(type)) {
2811                         panic("nested functions not supported yet");
2812                 } else {
2813                         create_local_variable(declaration);
2814                 }
2815                 return;
2816         case STORAGE_CLASS_TYPEDEF:
2817         case STORAGE_CLASS_THREAD:
2818         case STORAGE_CLASS_THREAD_EXTERN:
2819         case STORAGE_CLASS_THREAD_STATIC:
2820                 return;
2821         }
2822         panic("invalid storage class found");
2823 }
2824
2825 static void declaration_statement_to_firm(declaration_statement_t *statement)
2826 {
2827         declaration_t *declaration = statement->declarations_begin;
2828         declaration_t *end         = statement->declarations_end->next;
2829         for( ; declaration != end; declaration = declaration->next) {
2830                 create_local_variable(declaration);
2831         }
2832 }
2833
2834 static void if_statement_to_firm(if_statement_t *statement)
2835 {
2836         ir_node *cur_block = get_cur_block();
2837
2838         ir_node *fallthrough_block = new_immBlock();
2839
2840         /* the true (blocks) */
2841         ir_node *true_block;
2842         if (statement->true_statement != NULL) {
2843                 true_block = new_immBlock();
2844                 statement_to_firm(statement->true_statement);
2845                 if(get_cur_block() != NULL) {
2846                         ir_node *jmp = new_Jmp();
2847                         add_immBlock_pred(fallthrough_block, jmp);
2848                 }
2849         } else {
2850                 true_block = fallthrough_block;
2851         }
2852
2853         /* the false (blocks) */
2854         ir_node *false_block;
2855         if(statement->false_statement != NULL) {
2856                 false_block = new_immBlock();
2857
2858                 statement_to_firm(statement->false_statement);
2859                 if(get_cur_block() != NULL) {
2860                         ir_node *jmp = new_Jmp();
2861                         add_immBlock_pred(fallthrough_block, jmp);
2862                 }
2863         } else {
2864                 false_block = fallthrough_block;
2865         }
2866
2867         /* create the condition */
2868         if(cur_block != NULL) {
2869                 set_cur_block(cur_block);
2870                 create_condition_evaluation(statement->condition, true_block,
2871                                             false_block);
2872         }
2873
2874         mature_immBlock(true_block);
2875         if(false_block != fallthrough_block) {
2876                 mature_immBlock(false_block);
2877         }
2878         mature_immBlock(fallthrough_block);
2879
2880         set_cur_block(fallthrough_block);
2881 }
2882
2883 static void while_statement_to_firm(while_statement_t *statement)
2884 {
2885         ir_node *jmp = NULL;
2886         if(get_cur_block() != NULL) {
2887                 jmp = new_Jmp();
2888         }
2889
2890         /* create the header block */
2891         ir_node *header_block = new_immBlock();
2892         if(jmp != NULL) {
2893                 add_immBlock_pred(header_block, jmp);
2894         }
2895
2896         /* the false block */
2897         ir_node *false_block = new_immBlock();
2898
2899         /* the loop body */
2900         ir_node *body_block;
2901         if (statement->body != NULL) {
2902                 ir_node *old_continue_label = continue_label;
2903                 ir_node *old_break_label    = break_label;
2904                 continue_label              = header_block;
2905                 break_label                 = false_block;
2906
2907                 body_block = new_immBlock();
2908                 statement_to_firm(statement->body);
2909
2910                 assert(continue_label == header_block);
2911                 assert(break_label    == false_block);
2912                 continue_label = old_continue_label;
2913                 break_label    = old_break_label;
2914
2915                 if(get_cur_block() != NULL) {
2916                         jmp = new_Jmp();
2917                         add_immBlock_pred(header_block, jmp);
2918                 }
2919         } else {
2920                 body_block = header_block;
2921         }
2922
2923         /* create the condition */
2924         set_cur_block(header_block);
2925
2926         create_condition_evaluation(statement->condition, body_block, false_block);
2927         mature_immBlock(body_block);
2928         mature_immBlock(false_block);
2929         mature_immBlock(header_block);
2930
2931         set_cur_block(false_block);
2932 }
2933
2934 static void do_while_statement_to_firm(do_while_statement_t *statement)
2935 {
2936         ir_node *jmp = NULL;
2937         if(get_cur_block() != NULL) {
2938                 jmp = new_Jmp();
2939         }
2940
2941         /* create the header block */
2942         ir_node *header_block = new_immBlock();
2943
2944         /* the false block */
2945         ir_node *false_block = new_immBlock();
2946
2947         /* the loop body */
2948         ir_node *body_block = new_immBlock();
2949         if(jmp != NULL) {
2950                 add_immBlock_pred(body_block, jmp);
2951         }
2952
2953         if (statement->body != NULL) {
2954                 ir_node *old_continue_label = continue_label;
2955                 ir_node *old_break_label    = break_label;
2956                 continue_label              = header_block;
2957                 break_label                 = false_block;
2958
2959                 statement_to_firm(statement->body);
2960
2961                 assert(continue_label == header_block);
2962                 assert(break_label    == false_block);
2963                 continue_label = old_continue_label;
2964                 break_label    = old_break_label;
2965
2966                 if (get_cur_block() == NULL) {
2967                         mature_immBlock(header_block);
2968                         mature_immBlock(body_block);
2969                         mature_immBlock(false_block);
2970                         return;
2971                 }
2972         }
2973
2974         ir_node *body_jmp = new_Jmp();
2975         add_immBlock_pred(header_block, body_jmp);
2976         mature_immBlock(header_block);
2977
2978         /* create the condition */
2979         set_cur_block(header_block);
2980
2981         create_condition_evaluation(statement->condition, body_block, false_block);
2982         mature_immBlock(body_block);
2983         mature_immBlock(false_block);
2984         mature_immBlock(header_block);
2985
2986         set_cur_block(false_block);
2987 }
2988
2989 static void for_statement_to_firm(for_statement_t *statement)
2990 {
2991         ir_node *jmp = NULL;
2992         if (get_cur_block() != NULL) {
2993                 if(statement->initialisation != NULL) {
2994                         expression_to_firm(statement->initialisation);
2995                 }
2996
2997                 /* create declarations */
2998                 declaration_t *declaration = statement->context.declarations;
2999                 for( ; declaration != NULL; declaration = declaration->next) {
3000                         create_local_declaration(declaration);
3001                 }
3002
3003                 jmp = new_Jmp();
3004         }
3005
3006
3007         /* create the step block */
3008         ir_node *const step_block = new_immBlock();
3009         if (statement->step != NULL) {
3010                 expression_to_firm(statement->step);
3011         }
3012         ir_node *const step_jmp = new_Jmp();
3013
3014         /* create the header block */
3015         ir_node *const header_block = new_immBlock();
3016         if (jmp != NULL) {
3017                 add_immBlock_pred(header_block, jmp);
3018         }
3019         add_immBlock_pred(header_block, step_jmp);
3020
3021         /* the false block */
3022         ir_node *const false_block = new_immBlock();
3023
3024         /* the loop body */
3025         ir_node * body_block;
3026         if (statement->body != NULL) {
3027                 ir_node *const old_continue_label = continue_label;
3028                 ir_node *const old_break_label    = break_label;
3029                 continue_label = step_block;
3030                 break_label    = false_block;
3031
3032                 body_block = new_immBlock();
3033                 statement_to_firm(statement->body);
3034
3035                 assert(continue_label == step_block);
3036                 assert(break_label    == false_block);
3037                 continue_label = old_continue_label;
3038                 break_label    = old_break_label;
3039
3040                 if (get_cur_block() != NULL) {
3041                         jmp = new_Jmp();
3042                         add_immBlock_pred(step_block, jmp);
3043                 }
3044         } else {
3045                 body_block = step_block;
3046         }
3047
3048         /* create the condition */
3049         set_cur_block(header_block);
3050         if (statement->condition != NULL) {
3051                 create_condition_evaluation(statement->condition, body_block,
3052                                             false_block);
3053         } else {
3054                 keep_alive(header_block);
3055                 jmp = new_Jmp();
3056                 add_immBlock_pred(body_block, jmp);
3057         }
3058
3059         mature_immBlock(body_block);
3060         mature_immBlock(false_block);
3061         mature_immBlock(step_block);
3062         mature_immBlock(header_block);
3063         mature_immBlock(false_block);
3064
3065         set_cur_block(false_block);
3066 }
3067
3068 static void create_jump_statement(const statement_t *statement,
3069                                   ir_node *target_block)
3070 {
3071         if(get_cur_block() == NULL)
3072                 return;
3073
3074         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3075         ir_node  *jump = new_d_Jmp(dbgi);
3076         add_immBlock_pred(target_block, jump);
3077
3078         set_cur_block(NULL);
3079 }
3080
3081 static void switch_statement_to_firm(const switch_statement_t *statement)
3082 {
3083         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
3084
3085         ir_node *expression  = expression_to_firm(statement->expression);
3086         ir_node *cond        = new_d_Cond(dbgi, expression);
3087         ir_node *break_block = new_immBlock();
3088
3089         set_cur_block(NULL);
3090
3091         ir_node *const old_switch_cond       = current_switch_cond;
3092         ir_node *const old_break_label       = break_label;
3093         const bool     old_saw_default_label = saw_default_label;
3094         current_switch_cond                  = cond;
3095         break_label                          = break_block;
3096
3097         statement_to_firm(statement->body);
3098
3099         if(get_cur_block() != NULL) {
3100                 ir_node *jmp = new_Jmp();
3101                 add_immBlock_pred(break_block, jmp);
3102         }
3103
3104         if (!saw_default_label) {
3105                 set_cur_block(get_nodes_block(cond));
3106                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
3107                                                         MAGIC_DEFAULT_PN_NUMBER);
3108                 add_immBlock_pred(break_block, proj);
3109         }
3110
3111         assert(current_switch_cond == cond);
3112         assert(break_label         == break_block);
3113         current_switch_cond = old_switch_cond;
3114         break_label         = old_break_label;
3115         saw_default_label   = old_saw_default_label;
3116
3117         mature_immBlock(break_block);
3118         set_cur_block(break_block);
3119 }
3120
3121 static void case_label_to_firm(const case_label_statement_t *statement)
3122 {
3123         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
3124
3125         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
3126
3127         /* let's create a node and hope firm constant folding creates a Const
3128          * node... */
3129         ir_node *proj;
3130         set_cur_block(get_nodes_block(current_switch_cond));
3131         if(statement->expression) {
3132                 long pn = fold_constant(statement->expression);
3133                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
3134                         /* oops someone detected our cheating... */
3135                         panic("magic default pn used");
3136                 }
3137                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
3138         } else {
3139                 saw_default_label = true;
3140                 proj = new_d_defaultProj(dbgi, current_switch_cond,
3141                                          MAGIC_DEFAULT_PN_NUMBER);
3142         }
3143
3144         ir_node *block = new_immBlock();
3145         if (fallthrough != NULL) {
3146                 add_immBlock_pred(block, fallthrough);
3147         }
3148         add_immBlock_pred(block, proj);
3149         mature_immBlock(block);
3150
3151         if(statement->label_statement != NULL) {
3152                 statement_to_firm(statement->label_statement);
3153         }
3154 }
3155
3156 static ir_node *get_label_block(declaration_t *label)
3157 {
3158         assert(label->namespc == NAMESPACE_LABEL);
3159
3160         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3161                 return label->v.block;
3162         }
3163         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3164
3165         ir_node *old_cur_block = get_cur_block();
3166         ir_node *block         = new_immBlock();
3167         set_cur_block(old_cur_block);
3168
3169         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3170         label->v.block          = block;
3171
3172         ARR_APP1(ir_node *, imature_blocks, block);
3173
3174         return block;
3175 }
3176
3177 static void label_to_firm(const label_statement_t *statement)
3178 {
3179         ir_node *block = get_label_block(statement->label);
3180
3181         if(get_cur_block() != NULL) {
3182                 ir_node *jmp = new_Jmp();
3183                 add_immBlock_pred(block, jmp);
3184         }
3185
3186         set_cur_block(block);
3187         keep_alive(block);
3188
3189         if(statement->label_statement != NULL) {
3190                 statement_to_firm(statement->label_statement);
3191         }
3192 }
3193
3194 static void goto_to_firm(const goto_statement_t *statement)
3195 {
3196         if(get_cur_block() == NULL)
3197                 return;
3198
3199         ir_node *block = get_label_block(statement->label);
3200         ir_node *jmp   = new_Jmp();
3201         add_immBlock_pred(block, jmp);
3202
3203         set_cur_block(NULL);
3204 }
3205
3206 typedef enum modifier_t {
3207         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
3208         ASM_MODIFIER_READ_WRITE   = 1 << 1,
3209         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
3210         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
3211 } modifier_t;
3212
3213 #if 0
3214 static void asm_statement_to_firm(const asm_statement_t *statement)
3215 {
3216         bool needs_memory = false;
3217
3218         size_t         n_clobbers = 0;
3219         asm_clobber_t *clobber    = statement->clobbers;
3220         for( ; clobber != NULL; clobber = clobber->next) {
3221                 if(strcmp(clobber->clobber, "memory") == 0) {
3222                         needs_memory = true;
3223                         continue;
3224                 }
3225
3226                 ident *id = new_id_from_str(clobber->clobber);
3227                 obstack_ptr_grow(&asm_obst, id);
3228                 ++n_clobbers;
3229         }
3230         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
3231         ident **clobbers = NULL;
3232         if(n_clobbers > 0) {
3233                 clobbers = obstack_finish(&asm_obst);
3234         }
3235
3236         /* find and count input and output constraints */
3237         asm_constraint_t *constraint = statement->inputs;
3238         for( ; constraint != NULL; constraint = constraint->next) {
3239                 int  modifiers      = 0;
3240                 bool supports_memop = false;
3241                 for(const char *c = constraint->constraints; *c != 0; ++c) {
3242                         /* TODO: improve error messages */
3243                         switch(*c) {
3244                         case '?':
3245                         case '!':
3246                                 panic("multiple alternative assembler constraints not "
3247                                       "supported");
3248                         case 'm':
3249                         case 'o':
3250                         case 'V':
3251                         case '<':
3252                         case '>':
3253                         case 'X':
3254                                 supports_memop = true;
3255                                 obstack_1grow(&asm_obst, *c);
3256                                 break;
3257                         case '=':
3258                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
3259                                         panic("inconsistent register constraints");
3260                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
3261                                 break;
3262                         case '+':
3263                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
3264                                         panic("inconsistent register constraints");
3265                                 modifiers |= ASM_MODIFIER_READ_WRITE;
3266                                 break;
3267                         case '&':
3268                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
3269                                 panic("early clobber assembler constraint not supported yet");
3270                                 break;
3271                         case '%':
3272                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
3273                                 panic("commutative assembler constraint not supported yet");
3274                                 break;
3275                         case '#':
3276                                 /* skip register preferences stuff... */
3277                                 while(*c != 0 && *c != ',')
3278                                         ++c;
3279                                 break;
3280                         case '*':
3281                                 /* skip register preferences stuff... */
3282                                 ++c;
3283                                 break;
3284                         default:
3285                                 obstack_1grow(&asm_obst, *c);
3286                                 break;
3287                         }
3288                 }
3289                 obstack_1grow(&asm_obst, '\0');
3290                 const char *constraint_string = obstack_finish(&asm_obst);
3291
3292                 needs_memory |= supports_memop;
3293                 if(supports_memop) {
3294
3295                 }
3296         }
3297
3298 }
3299 #endif
3300
3301 static void statement_to_firm(statement_t *statement)
3302 {
3303         switch(statement->kind) {
3304         case STATEMENT_INVALID:
3305                 panic("invalid statement found");
3306         case STATEMENT_COMPOUND:
3307                 compound_statement_to_firm(&statement->compound);
3308                 return;
3309         case STATEMENT_RETURN:
3310                 return_statement_to_firm(&statement->returns);
3311                 return;
3312         case STATEMENT_EXPRESSION:
3313                 expression_statement_to_firm(&statement->expression);
3314                 return;
3315         case STATEMENT_IF:
3316                 if_statement_to_firm(&statement->ifs);
3317                 return;
3318         case STATEMENT_WHILE:
3319                 while_statement_to_firm(&statement->whiles);
3320                 return;
3321         case STATEMENT_DO_WHILE:
3322                 do_while_statement_to_firm(&statement->do_while);
3323                 return;
3324         case STATEMENT_DECLARATION:
3325                 declaration_statement_to_firm(&statement->declaration);
3326                 return;
3327         case STATEMENT_BREAK:
3328                 create_jump_statement(statement, break_label);
3329                 return;
3330         case STATEMENT_CONTINUE:
3331                 create_jump_statement(statement, continue_label);
3332                 return;
3333         case STATEMENT_SWITCH:
3334                 switch_statement_to_firm(&statement->switchs);
3335                 return;
3336         case STATEMENT_CASE_LABEL:
3337                 case_label_to_firm(&statement->case_label);
3338                 return;
3339         case STATEMENT_FOR:
3340                 for_statement_to_firm(&statement->fors);
3341                 return;
3342         case STATEMENT_LABEL:
3343                 label_to_firm(&statement->label);
3344                 return;
3345         case STATEMENT_GOTO:
3346                 goto_to_firm(&statement->gotos);
3347                 return;
3348         case STATEMENT_ASM:
3349                 //asm_statement_to_firm(&statement->asms);
3350                 //return;
3351                 break;
3352         }
3353         panic("Statement not implemented\n");
3354 }
3355
3356 static int count_decls_in_expression(const expression_t *expression);
3357
3358 static int count_local_declarations(const declaration_t *      decl,
3359                                     const declaration_t *const end)
3360 {
3361         int count = 0;
3362         for (; decl != end; decl = decl->next) {
3363                 const type_t *type = skip_typeref(decl->type);
3364                 switch (type->kind) {
3365                         case TYPE_ATOMIC:
3366                         case TYPE_ENUM:
3367                         case TYPE_POINTER:
3368                                 if (!decl->address_taken)
3369                                         ++count;
3370                                 break;
3371
3372                         default: break;
3373                 }
3374                 const initializer_t *initializer = decl->init.initializer;
3375                 /* FIXME: should walk initializer hierarchies... */
3376                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
3377                         count += count_decls_in_expression(initializer->value.value);
3378                 }
3379         }
3380         return count;
3381 }
3382
3383 static int count_decls_in_expression(const expression_t *expression) {
3384         if(expression == NULL)
3385                 return 0;
3386
3387         switch(expression->base.kind) {
3388         case EXPR_STATEMENT:
3389                 return count_decls_in_stmts(expression->statement.statement);
3390         EXPR_BINARY_CASES
3391                 return count_decls_in_expression(expression->binary.left)
3392                         + count_decls_in_expression(expression->binary.right);
3393         EXPR_UNARY_CASES
3394                 return count_decls_in_expression(expression->unary.value);
3395
3396         default:
3397                 break;
3398         }
3399
3400         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
3401          * (or implement all the missing expressions here/implement a walker)
3402          */
3403
3404         return 0;
3405 }
3406
3407 static int count_decls_in_stmts(const statement_t *stmt)
3408 {
3409         int count = 0;
3410         for (; stmt != NULL; stmt = stmt->base.next) {
3411                 switch (stmt->kind) {
3412                         case STATEMENT_DECLARATION: {
3413                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
3414                                 count += count_local_declarations(decl_stmt->declarations_begin,
3415                                                                   decl_stmt->declarations_end->next);
3416                                 break;
3417                         }
3418
3419                         case STATEMENT_COMPOUND: {
3420                                 const compound_statement_t *const comp =
3421                                         &stmt->compound;
3422                                 count += count_decls_in_stmts(comp->statements);
3423                                 break;
3424                         }
3425
3426                         case STATEMENT_IF: {
3427                                 const if_statement_t *const if_stmt = &stmt->ifs;
3428                                 count += count_decls_in_expression(if_stmt->condition);
3429                                 count += count_decls_in_stmts(if_stmt->true_statement);
3430                                 count += count_decls_in_stmts(if_stmt->false_statement);
3431                                 break;
3432                         }
3433
3434                         case STATEMENT_SWITCH: {
3435                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
3436                                 count += count_decls_in_expression(switch_stmt->expression);
3437                                 count += count_decls_in_stmts(switch_stmt->body);
3438                                 break;
3439                         }
3440
3441                         case STATEMENT_LABEL: {
3442                                 const label_statement_t *const label_stmt = &stmt->label;
3443                                 count += count_decls_in_stmts(label_stmt->label_statement);
3444                                 break;
3445                         }
3446
3447                         case STATEMENT_WHILE: {
3448                                 const while_statement_t *const while_stmt = &stmt->whiles;
3449                                 count += count_decls_in_expression(while_stmt->condition);
3450                                 count += count_decls_in_stmts(while_stmt->body);
3451                                 break;
3452                         }
3453
3454                         case STATEMENT_DO_WHILE: {
3455                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
3456                                 count += count_decls_in_expression(do_while_stmt->condition);
3457                                 count += count_decls_in_stmts(do_while_stmt->body);
3458                                 break;
3459                         }
3460
3461                         case STATEMENT_FOR: {
3462                                 const for_statement_t *const for_stmt = &stmt->fors;
3463                                 count += count_local_declarations(for_stmt->context.declarations, NULL);
3464                                 count += count_decls_in_expression(for_stmt->initialisation);
3465                                 count += count_decls_in_expression(for_stmt->condition);
3466                                 count += count_decls_in_expression(for_stmt->step);
3467                                 count += count_decls_in_stmts(for_stmt->body);
3468                                 break;
3469                         }
3470
3471                         case STATEMENT_CASE_LABEL: {
3472                                 const case_label_statement_t *label = &stmt->case_label;
3473                                 count += count_decls_in_expression(label->expression);
3474                                 count += count_decls_in_stmts(label->label_statement);
3475                                 break;
3476                         }
3477
3478                         case STATEMENT_ASM:
3479                         case STATEMENT_BREAK:
3480                         case STATEMENT_CONTINUE:
3481                                 break;
3482
3483                         case STATEMENT_EXPRESSION: {
3484                                 const expression_statement_t *expr_stmt = &stmt->expression;
3485                                 count += count_decls_in_expression(expr_stmt->expression);
3486                                 break;
3487                         }
3488
3489                         case STATEMENT_GOTO:
3490                         case STATEMENT_INVALID:
3491                                 break;
3492
3493                         case STATEMENT_RETURN: {
3494                                 const return_statement_t *ret_stmt = &stmt->returns;
3495                                 count += count_decls_in_expression(ret_stmt->return_value);
3496                                 break;
3497                         }
3498                 }
3499         }
3500         return count;
3501 }
3502
3503 static int get_function_n_local_vars(declaration_t *declaration)
3504 {
3505         int count = 0;
3506
3507         /* count parameters */
3508         count += count_local_declarations(declaration->context.declarations, NULL);
3509
3510         /* count local variables declared in body */
3511         count += count_decls_in_stmts(declaration->init.statement);
3512
3513         return count;
3514 }
3515
3516 static void initialize_function_parameters(declaration_t *declaration)
3517 {
3518         ir_graph        *irg             = current_ir_graph;
3519         ir_node         *args            = get_irg_args(irg);
3520         ir_node         *start_block     = get_irg_start_block(irg);
3521         ir_type         *function_irtype = get_ir_type(declaration->type);
3522
3523         int            n         = 0;
3524         declaration_t *parameter = declaration->context.declarations;
3525         for( ; parameter != NULL; parameter = parameter->next, ++n) {
3526                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
3527                 type_t *type = skip_typeref(parameter->type);
3528
3529                 bool needs_entity = parameter->address_taken;
3530                 assert(!is_type_array(type));
3531                 if(is_type_compound(type)) {
3532                         needs_entity = true;
3533                 }
3534
3535                 if(needs_entity) {
3536                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
3537                         ident     *id     = new_id_from_str(parameter->symbol->string);
3538                         set_entity_ident(entity, id);
3539
3540                         parameter->declaration_kind
3541                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
3542                         parameter->v.entity = entity;
3543                         continue;
3544                 }
3545
3546                 ir_mode *mode = get_ir_mode(parameter->type);
3547                 long     pn   = n;
3548                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
3549
3550                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3551                 parameter->v.value_number   = next_value_number_function;
3552                 ++next_value_number_function;
3553
3554                 set_value(parameter->v.value_number, proj);
3555         }
3556 }
3557
3558 /**
3559  * Handle additional decl modifiers for IR-graphs
3560  *
3561  * @param irg            the IR-graph
3562  * @param dec_modifiers  additional modifiers
3563  */
3564 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
3565 {
3566         if (decl_modifiers & DM_NORETURN) {
3567                 /* TRUE if the declaration includes the Microsoft
3568                    __declspec(noreturn) specifier. */
3569                 set_irg_additional_property(irg, mtp_property_noreturn);
3570         }
3571         if (decl_modifiers & DM_NOTHROW) {
3572                 /* TRUE if the declaration includes the Microsoft
3573                    __declspec(nothrow) specifier. */
3574                 set_irg_additional_property(irg, mtp_property_nothrow);
3575         }
3576         if (decl_modifiers & DM_NAKED) {
3577                 /* TRUE if the declaration includes the Microsoft
3578                    __declspec(naked) specifier. */
3579                 set_irg_additional_property(irg, mtp_property_naked);
3580         }
3581         if (decl_modifiers & DM_FORCEINLINE) {
3582                 /* TRUE if the declaration includes the
3583                    Microsoft __forceinline specifier. */
3584                 set_irg_inline_property(irg, irg_inline_forced);
3585         }
3586         if (decl_modifiers & DM_NOINLINE) {
3587                 /* TRUE if the declaration includes the Microsoft
3588                    __declspec(noinline) specifier. */
3589                 set_irg_inline_property(irg, irg_inline_forbidden);
3590         }
3591 }
3592
3593 static void create_function(declaration_t *declaration)
3594 {
3595         ir_entity *function_entity = get_function_entity(declaration);
3596
3597         if(declaration->init.statement == NULL)
3598                 return;
3599
3600         current_function_decl = declaration;
3601         current_function_name = NULL;
3602
3603         assert(imature_blocks == NULL);
3604         imature_blocks = NEW_ARR_F(ir_node*, 0);
3605
3606         int       n_local_vars = get_function_n_local_vars(declaration);
3607         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
3608         ir_node  *first_block  = get_cur_block();
3609
3610         /* set inline flags */
3611         if (declaration->is_inline)
3612         set_irg_inline_property(irg, irg_inline_recomended);
3613     handle_decl_modifier_irg(irg, declaration->decl_modifiers);
3614
3615         next_value_number_function = 0;
3616         initialize_function_parameters(declaration);
3617
3618         statement_to_firm(declaration->init.statement);
3619
3620         ir_node *end_block = get_irg_end_block(irg);
3621
3622         /* do we have a return statement yet? */
3623         if(get_cur_block() != NULL) {
3624                 type_t *type = skip_typeref(declaration->type);
3625                 assert(is_type_function(type));
3626                 const function_type_t *func_type   = &type->function;
3627                 const type_t          *return_type
3628                         = skip_typeref(func_type->return_type);
3629
3630                 ir_node *ret;
3631                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
3632                         ret = new_Return(get_store(), 0, NULL);
3633                 } else {
3634                         ir_mode *mode;
3635                         if(is_type_scalar(return_type)) {
3636                                 mode = get_ir_mode(func_type->return_type);
3637                         } else {
3638                                 mode = mode_P_data;
3639                         }
3640
3641                         ir_node *in[1];
3642                         /* §5.1.2.2.3 main implicitly returns 0 */
3643                         if (strcmp(declaration->symbol->string, "main") == 0) {
3644                                 in[0] = new_Const(mode, get_mode_null(mode));
3645                         } else {
3646                                 in[0] = new_Unknown(mode);
3647                         }
3648                         ret = new_Return(get_store(), 1, in);
3649                 }
3650                 add_immBlock_pred(end_block, ret);
3651         }
3652
3653         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
3654                 mature_immBlock(imature_blocks[i]);
3655         }
3656         DEL_ARR_F(imature_blocks);
3657         imature_blocks = NULL;
3658
3659         mature_immBlock(first_block);
3660         mature_immBlock(end_block);
3661
3662         irg_finalize_cons(irg);
3663
3664         /* finalize the frame type */
3665         ir_type *frame_type = get_irg_frame_type(irg);
3666         int      n          = get_compound_n_members(frame_type);
3667         int      align_all  = 4;
3668         int      offset     = 0;
3669         for(int i = 0; i < n; ++i) {
3670                 ir_entity *entity      = get_compound_member(frame_type, i);
3671                 ir_type   *entity_type = get_entity_type(entity);
3672
3673                 int align = get_type_alignment_bytes(entity_type);
3674                 if(align > align_all)
3675                         align_all = align;
3676                 int misalign = 0;
3677                 if(align > 0) {
3678                         misalign  = offset % align;
3679                         if(misalign > 0) {
3680                                 offset += align - misalign;
3681                         }
3682                 }
3683
3684                 set_entity_offset(entity, offset);
3685                 offset += get_type_size_bytes(entity_type);
3686         }
3687         set_type_size_bytes(frame_type, offset);
3688         set_type_alignment_bytes(frame_type, align_all);
3689         set_type_state(frame_type, layout_fixed);
3690
3691         irg_vrfy(irg);
3692 }
3693
3694 static void create_global_variable(declaration_t *declaration)
3695 {
3696         ir_visibility  vis;
3697         ir_type       *var_type;
3698         switch ((storage_class_tag_t)declaration->storage_class) {
3699                 case STORAGE_CLASS_STATIC:
3700                         vis = visibility_local;
3701                         goto global_var;
3702
3703                 case STORAGE_CLASS_EXTERN:
3704                         vis = visibility_external_allocated;
3705                         goto global_var;
3706
3707                 case STORAGE_CLASS_NONE:
3708                         vis = visibility_external_visible;
3709                         goto global_var;
3710
3711                 case STORAGE_CLASS_THREAD:
3712                         vis = visibility_external_visible;
3713                         goto tls_var;
3714
3715                 case STORAGE_CLASS_THREAD_EXTERN:
3716                         vis = visibility_external_allocated;
3717                         goto tls_var;
3718
3719                 case STORAGE_CLASS_THREAD_STATIC:
3720                         vis = visibility_local;
3721                         goto tls_var;
3722
3723 tls_var:
3724                         var_type = get_tls_type();
3725                         goto create_var;
3726
3727 global_var:
3728                         var_type = get_glob_type();
3729                         goto create_var;
3730
3731 create_var:
3732                         create_declaration_entity(declaration, DECLARATION_KIND_GLOBAL_VARIABLE,
3733                                                   var_type);
3734                         set_entity_visibility(declaration->v.entity, vis);
3735
3736                         current_ir_graph = get_const_code_irg();
3737                         create_initializer(declaration);
3738                         return;
3739
3740                 case STORAGE_CLASS_TYPEDEF:
3741                 case STORAGE_CLASS_AUTO:
3742                 case STORAGE_CLASS_REGISTER:
3743                 case STORAGE_CLASS_ENUM_ENTRY:
3744                         break;
3745         }
3746         panic("Invalid storage class for global variable");
3747 }
3748
3749 static void context_to_firm(context_t *context)
3750 {
3751         /* first pass: create declarations */
3752         declaration_t *declaration = context->declarations;
3753         for( ; declaration != NULL; declaration = declaration->next) {
3754                 if(declaration->namespc != NAMESPACE_NORMAL)
3755                         continue;
3756                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3757                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3758                         continue;
3759                 if(declaration->symbol == NULL)
3760                         continue;
3761
3762                 type_t *type = skip_typeref(declaration->type);
3763                 if(is_type_function(type)) {
3764                         get_function_entity(declaration);
3765                 } else {
3766                         create_global_variable(declaration);
3767                 }
3768         }
3769
3770         /* second pass: create code */
3771         declaration = context->declarations;
3772         for( ; declaration != NULL; declaration = declaration->next) {
3773                 if(declaration->namespc != NAMESPACE_NORMAL)
3774                         continue;
3775                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3776                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3777                         continue;
3778                 if(declaration->symbol == NULL)
3779                         continue;
3780
3781                 type_t *type = declaration->type;
3782                 if(type->kind != TYPE_FUNCTION)
3783                         continue;
3784
3785                 create_function(declaration);
3786         }
3787 }
3788
3789 void init_ast2firm(void)
3790 {
3791         obstack_init(&asm_obst);
3792         init_atomic_modes();
3793
3794         /* create idents for all known runtime functions */
3795         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
3796                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
3797         }
3798 }
3799
3800 void exit_ast2firm(void)
3801 {
3802         obstack_free(&asm_obst, NULL);
3803 }
3804
3805 void translation_unit_to_firm(translation_unit_t *unit)
3806 {
3807         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3808         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
3809         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
3810
3811         ir_type_int        = get_ir_type(type_int);
3812         ir_type_const_char = get_ir_type(type_const_char);
3813         ir_type_wchar_t    = get_ir_type(type_wchar_t);
3814         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
3815                                                        type in firm */
3816
3817         type_void->base.firm_type = ir_type_void;
3818
3819         /* just to be sure */
3820         continue_label      = NULL;
3821         break_label         = NULL;
3822         current_switch_cond = NULL;
3823
3824         context_to_firm(&unit->context);
3825 }