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 "token_t.h"
  16 #include "type_t.h"
  17 #include "ast_t.h"
  18
  19 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  20
  21 static ir_type *ir_type_const_char;
  22 static ir_type *ir_type_void;
  23 static ir_type *ir_type_int;
  24 static ir_type *ir_type_void_ptr;
  25
  26 static type_t *type_const_char;
  27 static type_t *type_void;
  28 static type_t *type_int;
  29
  30 static int next_value_number_function;
  31 static ir_node *continue_label;
  32 static ir_node *break_label;
  33 static ir_node *current_switch_cond;
  34
  35 typedef enum declaration_type_t {
  36         DECLARATION_TYPE_UNKNOWN,
  37         DECLARATION_TYPE_FUNCTION,
  38         DECLARATION_TYPE_GLOBAL_VARIABLE,
  39         DECLARATION_TYPE_LOCAL_VARIABLE,
  40         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  41         DECLARATION_TYPE_COMPOUND_MEMBER
  42 } declaration_type_t;
  43
  44 typedef struct type2firm_env_t type2firm_env_t;
  45 struct type2firm_env_t {
  46         int can_cache;       /* nonzero if type can safely be cached because
  47                                 no typevariables are in the hierarchy */
  48 };
  49
  50 static ir_type *_get_ir_type(type2firm_env_t *env, type_t *type);
  51 static ir_type *get_ir_type(type_t *type);
  52
  53 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  54 {
  55         (void) pos;
  56 #if 0
  57         const declaration_t *declaration = & value_numbers[pos]->declaration;
  58
  59         print_warning_prefix(declaration->source_position);
  60         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  61                         declaration->symbol->string);
  62 #endif
  63         fprintf(stderr, "Some variable might be used uninitialized\n");
  64         return new_r_Unknown(irg, mode);
  65 }
  66
  67 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  68 {
  69         const source_position_t *pos = (const source_position_t*) dbg;
  70         if(pos == NULL)
  71                 return 0;
  72         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  73                                    pos->linenr);
  74 }
  75
  76 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  77 {
  78         const source_position_t *pos = (const source_position_t*) dbg;
  79         if(pos == NULL)
  80                 return NULL;
  81         if(line != NULL)
  82                 *line = pos->linenr;
  83         return pos->input_name;
  84 }
  85
  86 void init_ast2firm(void)
  87 {
  88         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  89         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  90         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  91
  92         ir_type_int        = get_ir_type(type_int);
  93         ir_type_const_char = get_ir_type(type_const_char);
  94         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  95                                                        type in firm */
  96         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  97                                               ir_type_void, mode_P_data);
  98
  99         type_void->firm_type = ir_type_void;
 100 }
 101
 102 void exit_ast2firm(void)
 103 {
 104 }
 105
 106 static unsigned unique_id = 0;
 107
 108 static ident *unique_ident(const char *tag)
 109 {
 110         char buf[256];
 111
 112         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 113         unique_id++;
 114         return new_id_from_str(buf);
 115 }
 116
 117 static type_t *skip_typeref(type_t *type)
 118 {
 119         while(1) {
 120                 switch(type->type) {
 121                 case TYPE_TYPEDEF: {
 122                         const typedef_type_t *typedef_type = (const typedef_type_t*) type;
 123                         type = typedef_type->declaration->type;
 124                         continue;
 125                 }
 126                 case TYPE_TYPEOF: {
 127                         const typeof_type_t *typeof_type = (const typeof_type_t *) type;
 128                         if(typeof_type->typeof_type != NULL) {
 129                                 type = typeof_type->typeof_type;
 130                         } else {
 131                                 type = typeof_type->expression->datatype;
 132                         }
 133                         continue;
 134                 }
 135                 default:
 136                         break;
 137                 }
 138                 break;
 139         }
 140
 141         return type;
 142 }
 143
 144 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 145 {
 146         switch(atomic_type->atype) {
 147         case ATOMIC_TYPE_SCHAR:
 148         case ATOMIC_TYPE_CHAR:
 149                 return mode_Bs;
 150         case ATOMIC_TYPE_UCHAR:
 151                 return mode_Bu;
 152         case ATOMIC_TYPE_SHORT:
 153                 return mode_Hs;
 154         case ATOMIC_TYPE_USHORT:
 155                 return mode_Hu;
 156         case ATOMIC_TYPE_LONG:
 157         case ATOMIC_TYPE_INT:
 158                 return mode_Is;
 159         case ATOMIC_TYPE_ULONG:
 160         case ATOMIC_TYPE_UINT:
 161                 return mode_Iu;
 162         case ATOMIC_TYPE_LONGLONG:
 163                 return mode_Ls;
 164         case ATOMIC_TYPE_ULONGLONG:
 165                 return mode_Lu;
 166         case ATOMIC_TYPE_FLOAT:
 167                 return mode_F;
 168         case ATOMIC_TYPE_DOUBLE:
 169                 return mode_D;
 170         case ATOMIC_TYPE_LONG_DOUBLE:
 171                 return mode_E;
 172         case ATOMIC_TYPE_BOOL:
 173                 return mode_b;
 174 #ifdef PROVIDE_COMPLEX
 175         case ATOMIC_TYPE_FLOAT_COMPLEX:
 176         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 177         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 178                 panic("complex lowering not implemented yet");
 179                 break;
 180         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 181         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 182         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 183                 panic("imaginary lowering not implemented yet");
 184                 break;
 185 #endif
 186         case ATOMIC_TYPE_VOID:
 187                 panic("tried to get mode from void type");
 188                 break;
 189         case ATOMIC_TYPE_INVALID:
 190                 break;
 191         }
 192         panic("Encountered unknown atomic type");
 193 }
 194
 195
 196 static unsigned get_type_size(type_t *type);
 197
 198 static unsigned get_atomic_type_size(const atomic_type_t *type)
 199 {
 200         switch(type->atype) {
 201         case ATOMIC_TYPE_CHAR:
 202         case ATOMIC_TYPE_SCHAR:
 203         case ATOMIC_TYPE_UCHAR:
 204                 return 1;
 205
 206         case ATOMIC_TYPE_SHORT:
 207         case ATOMIC_TYPE_USHORT:
 208                 return 2;
 209
 210         case ATOMIC_TYPE_BOOL:
 211         case ATOMIC_TYPE_INT:
 212         case ATOMIC_TYPE_UINT:
 213         case ATOMIC_TYPE_LONG:
 214         case ATOMIC_TYPE_ULONG:
 215         case ATOMIC_TYPE_FLOAT:
 216                 return 4;
 217
 218         case ATOMIC_TYPE_LONGLONG:
 219         case ATOMIC_TYPE_ULONGLONG:
 220         case ATOMIC_TYPE_DOUBLE:
 221                 return 8;
 222
 223         case ATOMIC_TYPE_LONG_DOUBLE:
 224                 return 12;
 225
 226         case ATOMIC_TYPE_VOID:
 227                 return 1;
 228
 229         case ATOMIC_TYPE_INVALID:
 230                 break;
 231         }
 232         panic("Trying to determine size of invalid atomic type");
 233 }
 234
 235 static unsigned get_compound_type_size(compound_type_t *type)
 236 {
 237         ir_type *irtype = get_ir_type(&type->type);
 238         return get_type_size_bytes(irtype);
 239 }
 240
 241 static unsigned get_array_type_size(array_type_t *type)
 242 {
 243         ir_type *irtype = get_ir_type(&type->type);
 244         return get_type_size_bytes(irtype);
 245 }
 246
 247 static unsigned get_type_size(type_t *type)
 248 {
 249         type = skip_typeref(type);
 250
 251         switch(type->type) {
 252         case TYPE_ATOMIC:
 253                 return get_atomic_type_size((const atomic_type_t*) type);
 254         case TYPE_ENUM:
 255                 return get_mode_size_bytes(mode_Is);
 256         case TYPE_COMPOUND_UNION:
 257         case TYPE_COMPOUND_STRUCT:
 258                 return get_compound_type_size((compound_type_t*) type);
 259         case TYPE_FUNCTION:
 260                 /* just a pointer to the function */
 261                 return get_mode_size_bytes(mode_P_code);
 262         case TYPE_POINTER:
 263                 return get_mode_size_bytes(mode_P_data);
 264         case TYPE_ARRAY:
 265                 return get_array_type_size((array_type_t*) type);
 266         case TYPE_BUILTIN:
 267         case TYPE_TYPEDEF:
 268         case TYPE_TYPEOF:
 269         case TYPE_INVALID:
 270                 break;
 271         }
 272         panic("Trying to determine size of invalid type");
 273 }
 274
 275 static unsigned count_parameters(const function_type_t *function_type)
 276 {
 277         unsigned count = 0;
 278
 279         function_parameter_t *parameter = function_type->parameters;
 280         for ( ; parameter != NULL; parameter = parameter->next) {
 281                 ++count;
 282         }
 283
 284         return count;
 285 }
 286
 287
 288
 289
 290 static ir_type *create_atomic_type(type2firm_env_t *env,
 291                                    const atomic_type_t *type)
 292 {
 293         (void) env;
 294         ir_mode *mode   = get_atomic_mode(type);
 295         ident   *id     = get_mode_ident(mode);
 296         ir_type *irtype = new_type_primitive(id, mode);
 297
 298         return irtype;
 299 }
 300
 301 static ir_type *create_method_type(type2firm_env_t *env,
 302                                    const function_type_t *function_type)
 303 {
 304         type_t  *result_type  = function_type->result_type;
 305
 306         ident   *id           = unique_ident("functiontype");
 307         int      n_parameters = count_parameters(function_type);
 308         int      n_results    = result_type == type_void ? 0 : 1;
 309         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 310
 311         if(result_type != type_void) {
 312                 ir_type *restype = _get_ir_type(env, result_type);
 313                 set_method_res_type(irtype, 0, restype);
 314         }
 315
 316         function_parameter_t *parameter = function_type->parameters;
 317         int                   n         = 0;
 318         for( ; parameter != NULL; parameter = parameter->next) {
 319                 ir_type *p_irtype = _get_ir_type(env, parameter->type);
 320                 set_method_param_type(irtype, n, p_irtype);
 321                 ++n;
 322         }
 323
 324         if(function_type->variadic) {
 325                 set_method_variadicity(irtype, variadicity_variadic);
 326         }
 327
 328         return irtype;
 329 }
 330
 331 static ir_type *create_pointer_type(type2firm_env_t *env, pointer_type_t *type)
 332 {
 333         type_t  *points_to = type->points_to;
 334         ir_type *ir_points_to;
 335         /* Avoid endless recursion if the points_to type contains this poiner type
 336          * again (might be a struct). We therefore first create a void* pointer
 337          * and then set the real points_to type
 338          */
 339         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 340                                             ir_type_void, mode_P_data);
 341         type->type.firm_type  = ir_type;
 342
 343         ir_points_to = _get_ir_type(env, points_to);
 344         set_pointer_points_to_type(ir_type, ir_points_to);
 345
 346         return ir_type;
 347 }
 348
 349 static ir_type *create_array_type(type2firm_env_t *env, array_type_t *type)
 350 {
 351         type_t  *element_type    = type->element_type;
 352         ir_type *ir_element_type = _get_ir_type(env, element_type);
 353
 354         /* TODO... */
 355         int n_elements = 0;
 356         panic("TODO arraytpye size not implemented yet");
 357
 358         ir_type *ir_type = new_type_array(unique_ident("array"), 1, ir_element_type);
 359         set_array_bounds_int(ir_type, 0, 0, n_elements);
 360
 361         size_t elemsize = get_type_size_bytes(ir_element_type);
 362         int align = get_type_alignment_bytes(ir_element_type);
 363         if(elemsize % align > 0) {
 364                 elemsize += align - (elemsize % align);
 365         }
 366         set_type_size_bytes(ir_type, n_elements * elemsize);
 367         set_type_alignment_bytes(ir_type, align);
 368         set_type_state(ir_type, layout_fixed);
 369
 370         return ir_type;
 371 }
 372
 373 #define INVALID_TYPE ((ir_type_ptr)-1)
 374
 375 static ir_type *create_struct_type(type2firm_env_t *env, compound_type_t *type)
 376 {
 377         symbol_t *symbol = type->declaration->symbol;
 378         ident    *id;
 379         if(symbol != NULL) {
 380                 id = unique_ident(symbol->string);
 381         } else {
 382                 id = unique_ident("__anonymous_struct");
 383         }
 384         ir_type *ir_type = new_type_struct(id);
 385
 386         type->type.firm_type = ir_type;
 387
 388         int align_all = 1;
 389         int offset    = 0;
 390         declaration_t *entry = type->declaration->context.declarations;
 391         for( ; entry != NULL; entry = entry->next) {
 392                 ident       *ident         = new_id_from_str(entry->symbol->string);
 393                 ir_type_ptr  entry_ir_type = _get_ir_type(env, entry->type);
 394
 395                 int entry_size      = get_type_size_bytes(entry_ir_type);
 396                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 397                 int misalign = offset % entry_alignment;
 398                 offset += misalign;
 399
 400                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 401                 set_entity_offset(entity, offset);
 402                 add_struct_member(ir_type, entity);
 403                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 404                 entry->v.entity         = entity;
 405
 406                 offset += entry_size;
 407                 if(entry_alignment > align_all) {
 408                         if(entry_alignment % align_all != 0) {
 409                                 panic("Uneven alignments not supported yet");
 410                         }
 411                         align_all = entry_alignment;
 412                 }
 413         }
 414
 415         int misalign = offset % align_all;
 416         offset += misalign;
 417         set_type_alignment_bytes(ir_type, align_all);
 418         set_type_size_bytes(ir_type, offset);
 419         set_type_state(ir_type, layout_fixed);
 420
 421         return ir_type;
 422 }
 423
 424 static ir_type *create_union_type(type2firm_env_t *env, compound_type_t *type)
 425 {
 426         declaration_t *declaration = type->declaration;
 427         symbol_t      *symbol      = declaration->symbol;
 428         ident         *id;
 429         if(symbol != NULL) {
 430                 id = unique_ident(symbol->string);
 431         } else {
 432                 id = unique_ident("__anonymous_union");
 433         }
 434         ir_type  *ir_type = new_type_union(id);
 435
 436         type->type.firm_type = ir_type;
 437
 438         int align_all = 1;
 439         int size      = 0;
 440         declaration_t *entry = declaration->context.declarations;
 441         for( ; entry != NULL; entry = entry->next) {
 442                 ident       *ident         = new_id_from_str(entry->symbol->string);
 443                 ir_type_ptr  entry_ir_type = _get_ir_type(env, entry->type);
 444
 445                 int entry_size      = get_type_size_bytes(entry_ir_type);
 446                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 447
 448                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 449                 add_union_member(ir_type, entity);
 450                 set_entity_offset(entity, 0);
 451                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 452                 entry->v.entity         = entity;
 453
 454                 if(entry_size > size) {
 455                         size = entry_size;
 456                 }
 457                 if(entry_alignment > align_all) {
 458                         if(entry_alignment % align_all != 0) {
 459                                 panic("Uneven alignments not supported yet");
 460                         }
 461                         align_all = entry_alignment;
 462                 }
 463         }
 464
 465         set_type_alignment_bytes(ir_type, align_all);
 466         set_type_size_bytes(ir_type, size);
 467         set_type_state(ir_type, layout_fixed);
 468
 469         return ir_type;
 470 }
 471
 472 static ir_type *_get_ir_type(type2firm_env_t *env, type_t *type)
 473 {
 474         assert(type != NULL);
 475
 476         type = skip_typeref(type);
 477
 478         if(type->firm_type != NULL) {
 479                 assert(type->firm_type != INVALID_TYPE);
 480                 return type->firm_type;
 481         }
 482
 483         ir_type *firm_type = NULL;
 484         switch(type->type) {
 485         case TYPE_ATOMIC:
 486                 firm_type = create_atomic_type(env, (atomic_type_t*) type);
 487                 break;
 488         case TYPE_FUNCTION:
 489                 firm_type = create_method_type(env, (function_type_t*) type);
 490                 break;
 491         case TYPE_POINTER:
 492                 firm_type = create_pointer_type(env, (pointer_type_t*) type);
 493                 break;
 494         case TYPE_ARRAY:
 495                 firm_type = create_array_type(env, (array_type_t*) type);
 496                 break;
 497         case TYPE_COMPOUND_STRUCT:
 498                 firm_type = create_struct_type(env, (compound_type_t*) type);
 499                 break;
 500         case TYPE_COMPOUND_UNION:
 501                 firm_type = create_union_type(env, (compound_type_t*) type);
 502                 break;
 503         case TYPE_ENUM:
 504                 firm_type = ir_type_int;
 505                 break;
 506         case TYPE_BUILTIN:
 507         case TYPE_TYPEOF:
 508         case TYPE_TYPEDEF:
 509         case TYPE_INVALID:
 510                 break;
 511         }
 512         if(firm_type == NULL)
 513                 panic("unknown type found");
 514
 515         if(env->can_cache) {
 516                 type->firm_type = firm_type;
 517         }
 518         return firm_type;
 519
 520 }
 521
 522 static ir_type *get_ir_type(type_t *type)
 523 {
 524         type2firm_env_t env;
 525         env.can_cache = 1;
 526
 527         return _get_ir_type(&env, type);
 528 }
 529
 530 static inline ir_mode *get_ir_mode(type_t *type)
 531 {
 532         ir_type *irtype = get_ir_type(type);
 533         ir_mode *mode   = get_type_mode(irtype);
 534         assert(mode != NULL);
 535         return mode;
 536 }
 537
 538 static ir_entity* get_function_entity(declaration_t *declaration)
 539 {
 540         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 541                 return declaration->v.entity;
 542         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 543
 544         symbol_t *symbol = declaration->symbol;
 545         ident    *id     = new_id_from_str(symbol->string);
 546
 547         ir_type  *global_type    = get_glob_type();
 548         ir_type  *ir_type_method = get_ir_type(declaration->type);
 549         assert(is_Method_type(ir_type_method));
 550
 551         type_t    *type   = declaration->type;
 552         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 553         set_entity_ld_ident(entity, id);
 554         if(declaration->storage_class & STORAGE_CLASS_STATIC
 555                         || type->qualifiers & TYPE_QUALIFIER_INLINE) {
 556                 set_entity_visibility(entity, visibility_local);
 557         } else if(declaration->init.statement != NULL) {
 558                 set_entity_visibility(entity, visibility_external_visible);
 559         } else {
 560                 set_entity_visibility(entity, visibility_external_allocated);
 561         }
 562
 563         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 564         declaration->v.entity         = entity;
 565
 566         return entity;
 567 }
 568
 569
 570
 571 static ir_node *expression_to_firm(const expression_t *expression);
 572 static ir_node *_expression_to_firm(const expression_t *expression);
 573
 574 static dbg_info *get_dbg_info(const source_position_t *pos)
 575 {
 576         return (dbg_info*) pos;
 577 }
 578
 579 static ir_node *const_to_firm(const const_t *cnst)
 580 {
 581         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 582         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 583
 584         tarval   *tv;
 585         if(mode_is_float(mode)) {
 586                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 587         } else {
 588                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 589         }
 590
 591         return new_d_Const(dbgi, mode, tv);
 592 }
 593
 594 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 595 {
 596         assert(entity != NULL);
 597         union symconst_symbol sym;
 598         sym.entity_p = entity;
 599         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 600 }
 601
 602 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 603 {
 604         ir_type   *global_type = get_glob_type();
 605         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 606                                                 ir_type_const_char);
 607
 608         ident     *id     = unique_ident("Lstr");
 609         ir_entity *entity = new_entity(global_type, id, type);
 610         set_entity_ld_ident(entity, id);
 611         set_entity_variability(entity, variability_constant);
 612
 613         ir_type    *elem_type = ir_type_const_char;
 614         ir_mode    *mode      = get_type_mode(elem_type);
 615
 616         const char *string = literal->value;
 617         size_t      slen   = strlen(string) + 1;
 618
 619         set_array_lower_bound_int(type, 0, 0);
 620         set_array_upper_bound_int(type, 0, slen);
 621         set_type_size_bytes(type, slen);
 622         set_type_state(type, layout_fixed);
 623
 624         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 625         for(size_t i = 0; i < slen; ++i) {
 626                 tvs[i] = new_tarval_from_long(string[i], mode);
 627         }
 628
 629         set_array_entity_values(entity, tvs, slen);
 630         free(tvs);
 631
 632         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 633
 634         return create_symconst(dbgi, entity);
 635 }
 636
 637 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 638 {
 639         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 640         declaration_t *declaration = ref->declaration;
 641         type_t        *type        = declaration->type;
 642         ir_mode       *mode        = get_ir_mode(type);
 643
 644         switch((declaration_type_t) declaration->declaration_type) {
 645         case DECLARATION_TYPE_UNKNOWN:
 646                 break;
 647         case DECLARATION_TYPE_LOCAL_VARIABLE:
 648                 return get_value(declaration->v.value_number, mode);
 649         case DECLARATION_TYPE_FUNCTION: {
 650                 return create_symconst(dbgi, declaration->v.entity);
 651         }
 652         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 653         case DECLARATION_TYPE_GLOBAL_VARIABLE:
 654         case DECLARATION_TYPE_COMPOUND_MEMBER:
 655                 panic("not implemented reference type");
 656         }
 657
 658         panic("reference to declaration with unknown type found");
 659 }
 660
 661 static ir_node *call_expression_to_firm(const call_expression_t *call)
 662 {
 663         assert(get_cur_block() != NULL);
 664
 665         expression_t  *function = call->function;
 666         ir_node       *callee   = expression_to_firm(function);
 667
 668         assert(function->datatype->type == TYPE_FUNCTION);
 669         function_type_t *function_type = (function_type_t*) function->datatype;
 670
 671         int              n_parameters = 0;
 672         call_argument_t *argument     = call->arguments;
 673         for( ; argument != NULL; argument = argument->next) {
 674                 ++n_parameters;
 675         }
 676
 677         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 678         ir_type *new_method_type = NULL;
 679         if(function_type->variadic) {
 680                 /* we need to construct a new method type matching the call
 681                  * arguments... */
 682                 int n_res       = get_method_n_ress(ir_method_type);
 683                 new_method_type = new_type_method(unique_ident("calltype"),
 684                                                   n_parameters, n_res);
 685                 set_method_calling_convention(new_method_type,
 686                                get_method_calling_convention(ir_method_type));
 687                 set_method_additional_properties(new_method_type,
 688                                get_method_additional_properties(ir_method_type));
 689
 690                 for(int i = 0; i < n_res; ++i) {
 691                         set_method_res_type(new_method_type, i,
 692                                             get_method_res_type(ir_method_type, i));
 693                 }
 694         }
 695         ir_node *in[n_parameters];
 696
 697         argument = call->arguments;
 698         int n = 0;
 699         for( ; argument != NULL; argument = argument->next) {
 700                 expression_t *expression = argument->expression;
 701                 ir_node      *arg_node   = expression_to_firm(expression);
 702
 703                 in[n] = arg_node;
 704                 if(new_method_type != NULL) {
 705                         ir_type *irtype = get_ir_type(expression->datatype);
 706                         set_method_param_type(new_method_type, n, irtype);
 707                 }
 708
 709                 n++;
 710         }
 711         assert(n == n_parameters);
 712
 713         if(new_method_type != NULL)
 714                 ir_method_type = new_method_type;
 715
 716         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 717         ir_node  *store = get_store();
 718         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 719                                      ir_method_type);
 720         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 721         set_store(mem);
 722
 723         type_t  *result_type = function_type->result_type;
 724         ir_node *result      = NULL;
 725         if(result_type != type_void) {
 726                 ir_mode *mode    = get_ir_mode(result_type);
 727                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 728                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 729         }
 730
 731         return result;
 732 }
 733
 734 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 735                                           dbg_info *dbgi)
 736 {
 737         ir_mode *mode     = get_ir_mode(type);
 738         ir_node *memory   = get_store();
 739         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 740         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 741         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 742         set_store(load_mem);
 743
 744         return load_res;
 745 }
 746
 747 static ir_node *expression_to_addr(const expression_t *expression);
 748
 749 static void set_value_for_expression(const expression_t *expression,
 750                                      ir_node *value)
 751 {
 752         if(expression->type == EXPR_REFERENCE) {
 753                 reference_expression_t *ref = (reference_expression_t*) expression;
 754
 755                 declaration_t *declaration = ref->declaration;
 756                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 757                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 758                         set_value(declaration->v.value_number, value);
 759                         return;
 760                 }
 761         }
 762
 763         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 764         ir_node  *addr      = expression_to_addr(expression);
 765         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 766         ir_node  *memory    = get_store();
 767         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 768         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 769         set_store(store_mem);
 770 }
 771
 772 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 773 {
 774         ir_mode *value_mode = get_irn_mode(value);
 775
 776         if(value_mode == dest_mode)
 777                 return value;
 778
 779         if(dest_mode == mode_b) {
 780                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 781                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 782                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 783                 return proj;
 784         }
 785
 786         return new_d_Conv(dbgi, value, dest_mode);
 787 }
 788
 789 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 790 {
 791         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 792         type_t   *type = expression->expression.datatype;
 793         ir_mode  *mode = get_ir_mode(type);
 794
 795         if(expression->type == UNEXPR_TAKE_ADDRESS)
 796                 return expression_to_addr(expression->value);
 797
 798         const expression_t *value      = expression->value;
 799         ir_node            *value_node = expression_to_firm(value);
 800
 801         switch(expression->type) {
 802         case UNEXPR_NEGATE:
 803                 return new_d_Minus(dbgi, value_node, mode);
 804         case UNEXPR_PLUS:
 805                 return value_node;
 806         case UNEXPR_BITWISE_NEGATE:
 807                 return new_d_Not(dbgi, value_node, mode);
 808         case UNEXPR_NOT:
 809                 if(get_irn_mode(value_node) != mode_b) {
 810                         value_node = create_conv(dbgi, value_node, mode_b);
 811                 }
 812                 value_node = new_d_Not(dbgi, value_node, mode_b);
 813                 if(mode != mode_b) {
 814                         value_node = create_conv(dbgi, value_node, mode);
 815                 }
 816                 return value_node;
 817         case UNEXPR_DEREFERENCE:
 818                 return load_from_expression_addr(type, value_node, dbgi);
 819         case UNEXPR_POSTFIX_INCREMENT: {
 820                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 821                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 822                 set_value_for_expression(value, new_value);
 823                 return value_node;
 824         }
 825         case UNEXPR_POSTFIX_DECREMENT: {
 826                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 827                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 828                 set_value_for_expression(value, new_value);
 829                 return value_node;
 830         }
 831         case UNEXPR_PREFIX_INCREMENT: {
 832                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 833                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 834                 set_value_for_expression(value, new_value);
 835                 return new_value;
 836         }
 837         case UNEXPR_PREFIX_DECREMENT: {
 838                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 839                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 840                 set_value_for_expression(value, new_value);
 841                 return new_value;
 842         }
 843         case UNEXPR_CAST:
 844                 return create_conv(dbgi, value_node, mode);
 845
 846         case UNEXPR_TAKE_ADDRESS:
 847         case UNEXPR_INVALID:
 848                 break;
 849         }
 850         panic("invalid UNEXPR type found");
 851 }
 852
 853 static long get_pnc(binary_expression_type_t type)
 854 {
 855         switch(type) {
 856         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 857         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 858         case BINEXPR_LESS:         return pn_Cmp_Lt;
 859         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 860         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 861         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 862         default:
 863                 break;
 864         }
 865         panic("trying to get pn_Cmp from non-comparison binexpr type");
 866 }
 867
 868 static ir_node *create_lazy_op(const binary_expression_t *expression)
 869 {
 870         bool is_or = (expression->type == BINEXPR_LOGICAL_OR);
 871         assert(is_or || expression->type == BINEXPR_LOGICAL_AND);
 872
 873         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 874         ir_node  *val1 = expression_to_firm(expression->left);
 875         val1           = create_conv(dbgi, val1, mode_b);
 876
 877         ir_node *cond       = new_d_Cond(dbgi, val1);
 878         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 879         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 880
 881         ir_node *fallthrough_block = new_immBlock();
 882
 883         /* the true case */
 884         ir_node *calc_val2_block = new_immBlock();
 885         if(is_or) {
 886                 add_immBlock_pred(calc_val2_block, false_proj);
 887         } else {
 888                 add_immBlock_pred(calc_val2_block, true_proj);
 889         }
 890
 891         mature_immBlock(calc_val2_block);
 892
 893         ir_node *val2 = expression_to_firm(expression->right);
 894         val2          = create_conv(dbgi, val2, mode_b);
 895         if(get_cur_block() != NULL) {
 896                 ir_node *jmp = new_d_Jmp(dbgi);
 897                 add_immBlock_pred(fallthrough_block, jmp);
 898         }
 899
 900         /* fallthrough */
 901         ir_node *constb;
 902         if(is_or) {
 903                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_true());
 904                 add_immBlock_pred(fallthrough_block, true_proj);
 905         } else {
 906                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_false());
 907                 add_immBlock_pred(fallthrough_block, false_proj);
 908         }
 909         mature_immBlock(fallthrough_block);
 910
 911         set_cur_block(fallthrough_block);
 912
 913         ir_node *in[2] = { val2, constb };
 914         ir_node *val   = new_d_Phi(dbgi, 2, in, mode_b);
 915
 916         return val;
 917 }
 918
 919 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 920                                             ir_node *right, ir_mode *mode);
 921
 922 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 923                                         create_arithmetic_func func)
 924 {
 925         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 926         ir_node  *left  = expression_to_firm(expression->left);
 927         ir_node  *right = expression_to_firm(expression->right);
 928         type_t   *type  = expression->expression.datatype;
 929         ir_mode  *mode  = get_ir_mode(type);
 930         /* TODO FIXME Hack for now */
 931         right = create_conv(dbgi, right, get_irn_mode(left));
 932
 933         ir_node  *res   = func(dbgi, left, right, mode);
 934
 935         return res;
 936 }
 937
 938 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
 939 {
 940         binary_expression_type_t type = expression->type;
 941         switch(type) {
 942         case BINEXPR_EQUAL:
 943         case BINEXPR_NOTEQUAL:
 944         case BINEXPR_LESS:
 945         case BINEXPR_LESSEQUAL:
 946         case BINEXPR_GREATER:
 947         case BINEXPR_GREATEREQUAL: {
 948                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 949                 ir_node *left  = expression_to_firm(expression->left);
 950                 ir_node *right = expression_to_firm(expression->right);
 951                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
 952                 long     pnc   = get_pnc(type);
 953                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
 954                 return proj;
 955         }
 956         case BINEXPR_ASSIGN: {
 957                 ir_node *right = expression_to_firm(expression->right);
 958                 set_value_for_expression(expression->left, right);
 959                 return right;
 960         }
 961         case BINEXPR_ADD:
 962                 return create_arithmetic_binop(expression, new_d_Add);
 963         case BINEXPR_SUB:
 964                 return create_arithmetic_binop(expression, new_d_Sub);
 965         case BINEXPR_MUL:
 966                 return create_arithmetic_binop(expression, new_d_Mul);
 967         case BINEXPR_BITWISE_AND:
 968                 return create_arithmetic_binop(expression, new_d_And);
 969         case BINEXPR_BITWISE_OR:
 970                 return create_arithmetic_binop(expression, new_d_Or);
 971         case BINEXPR_BITWISE_XOR:
 972                 return create_arithmetic_binop(expression, new_d_Eor);
 973         case BINEXPR_SHIFTLEFT:
 974                 return create_arithmetic_binop(expression, new_d_Shl);
 975         case BINEXPR_SHIFTRIGHT:
 976                 return create_arithmetic_binop(expression, new_d_Shr);
 977         case BINEXPR_LOGICAL_AND:
 978         case BINEXPR_LOGICAL_OR:
 979                 return create_lazy_op(expression);
 980         default:
 981                 panic("TODO binexpr type");
 982         }
 983 }
 984
 985 static ir_node *array_access_addr(const array_access_expression_t *expression)
 986 {
 987         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 988
 989         ir_node *base_addr = expression_to_firm(expression->array_ref);
 990         ir_node *offset    = expression_to_firm(expression->index);
 991         offset             = create_conv(dbgi, offset, mode_Iu);
 992
 993         unsigned elem_size       = get_type_size(expression->expression.datatype);
 994         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
 995         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
 996                                              mode_Iu);
 997         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
 998
 999         return result;
1000 }
1001
1002 static ir_node *array_access_to_firm(
1003                 const array_access_expression_t *expression)
1004 {
1005
1006         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1007         ir_node  *addr = array_access_addr(expression);
1008         type_t   *type = expression->expression.datatype;
1009
1010         return load_from_expression_addr(type, addr, dbgi);
1011 }
1012
1013 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1014 {
1015         type_t *type = expression->type;
1016         if(type == NULL) {
1017                 type = expression->size_expression->datatype;
1018                 assert(type != NULL);
1019         }
1020
1021         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1022         unsigned  size      = get_type_size(type);
1023         ir_node  *size_node = new_Const_long(mode, size);
1024
1025         return size_node;
1026 }
1027
1028 static ir_node *expression_to_addr(const expression_t *expression)
1029 {
1030         switch(expression->type) {
1031         case EXPR_ARRAY_ACCESS:
1032                 return array_access_addr((const array_access_expression_t*) expression);
1033         default:
1034                 break;
1035         }
1036         panic("trying to get address of non-lvalue");
1037 }
1038
1039 static ir_node *_expression_to_firm(const expression_t *expression)
1040 {
1041         switch(expression->type) {
1042         case EXPR_CONST:
1043                 return const_to_firm((const const_t*) expression);
1044         case EXPR_STRING_LITERAL:
1045                 return string_literal_to_firm((const string_literal_t*) expression);
1046         case EXPR_REFERENCE:
1047                 return reference_expression_to_firm(
1048                                 (const reference_expression_t*) expression);
1049         case EXPR_CALL:
1050                 return call_expression_to_firm((const call_expression_t*) expression);
1051         case EXPR_UNARY:
1052                 return unary_expression_to_firm((const unary_expression_t*) expression);
1053         case EXPR_BINARY:
1054                 return binary_expression_to_firm(
1055                                 (const binary_expression_t*) expression);
1056         case EXPR_ARRAY_ACCESS:
1057                 return array_access_to_firm(
1058                                 (const array_access_expression_t*) expression);
1059         case EXPR_SIZEOF:
1060                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1061         default:
1062                 break;
1063         }
1064         panic("unsupported expression found");
1065 }
1066
1067 static ir_node *expression_to_firm(const expression_t *expression)
1068 {
1069         ir_node *res  = _expression_to_firm(expression);
1070
1071         if(expression->datatype == type_void)
1072                 return NULL;
1073
1074         ir_mode *mode = get_ir_mode(expression->datatype);
1075         res           = create_conv(NULL, res, mode);
1076         return res;
1077 }
1078
1079
1080 static void statement_to_firm(statement_t *statement);
1081
1082 static void return_statement_to_firm(return_statement_t *statement)
1083 {
1084         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1085         ir_node  *ret;
1086
1087         if(statement->return_value != NULL) {
1088                 ir_node *retval = expression_to_firm(statement->return_value);
1089                 ir_node *in[1];
1090
1091                 in[0] = retval;
1092                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1093         } else {
1094                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1095         }
1096         ir_node *end_block = get_irg_end_block(current_ir_graph);
1097         add_immBlock_pred(end_block, ret);
1098
1099         set_cur_block(NULL);
1100 }
1101
1102 static void compound_statement_to_firm(compound_statement_t *compound)
1103 {
1104         statement_t *statement = compound->statements;
1105         for( ; statement != NULL; statement = statement->next) {
1106                 //context2firm(&statement->context);
1107                 statement_to_firm(statement);
1108         }
1109 }
1110
1111 static void expression_statement_to_firm(expression_statement_t *statement)
1112 {
1113         expression_to_firm(statement->expression);
1114 }
1115
1116 static void if_statement_to_firm(if_statement_t *statement)
1117 {
1118         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
1119         ir_node  *condition = _expression_to_firm(statement->condition);
1120         assert(condition != NULL);
1121
1122         /* make sure we have a mode_b condition */
1123         condition = create_conv(dbgi, condition, mode_b);
1124
1125         ir_node *cond       = new_d_Cond(dbgi, condition);
1126         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1127         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1128
1129         ir_node *fallthrough_block = new_immBlock();
1130
1131         /* the true (blocks) */
1132         ir_node *true_block = new_immBlock();
1133         add_immBlock_pred(true_block, true_proj);
1134         mature_immBlock(true_block);
1135
1136         statement_to_firm(statement->true_statement);
1137         if(get_cur_block() != NULL) {
1138                 ir_node *jmp = new_Jmp();
1139                 add_immBlock_pred(fallthrough_block, jmp);
1140         }
1141
1142         /* the false (blocks) */
1143         if(statement->false_statement != NULL) {
1144                 ir_node *false_block = new_immBlock();
1145                 add_immBlock_pred(false_block, false_proj);
1146                 mature_immBlock(false_block);
1147
1148                 statement_to_firm(statement->false_statement);
1149                 if(get_cur_block() != NULL) {
1150                         ir_node *jmp = new_Jmp();
1151                         add_immBlock_pred(fallthrough_block, jmp);
1152                 }
1153         } else {
1154                 add_immBlock_pred(fallthrough_block, false_proj);
1155         }
1156         mature_immBlock(fallthrough_block);
1157
1158         set_cur_block(fallthrough_block);
1159 }
1160
1161 static void while_statement_to_firm(while_statement_t *statement)
1162 {
1163         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1164
1165         ir_node *jmp = NULL;
1166         if(get_cur_block() != NULL) {
1167                 jmp = new_Jmp();
1168         }
1169
1170         /* create the header block */
1171         ir_node *header_block = new_immBlock();
1172         if(jmp != NULL) {
1173                 add_immBlock_pred(header_block, jmp);
1174         }
1175
1176         /* create the condition */
1177         ir_node *condition = _expression_to_firm(statement->condition);
1178         condition          = create_conv(dbgi, condition, mode_b);
1179
1180         ir_node *cond       = new_d_Cond(dbgi, condition);
1181         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1182         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1183
1184         /* the false block */
1185         ir_node *false_block = new_immBlock();
1186         add_immBlock_pred(false_block, false_proj);
1187
1188         /* the loop body */
1189         ir_node *body_block = new_immBlock();
1190         add_immBlock_pred(body_block, true_proj);
1191         mature_immBlock(body_block);
1192
1193         ir_node *old_continue_label = continue_label;
1194         ir_node *old_break_label    = break_label;
1195         continue_label              = header_block;
1196         break_label                 = false_block;
1197
1198         statement_to_firm(statement->body);
1199
1200         assert(continue_label == header_block);
1201         assert(break_label    == false_block);
1202         continue_label = old_continue_label;
1203         break_label    = old_break_label;
1204
1205         if(get_cur_block() != NULL) {
1206                 ir_node *jmp = new_Jmp();
1207                 add_immBlock_pred(header_block, jmp);
1208         }
1209
1210         mature_immBlock(header_block);
1211         mature_immBlock(false_block);
1212
1213         set_cur_block(false_block);
1214 }
1215
1216 static void do_while_statement_to_firm(do_while_statement_t *statement)
1217 {
1218         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1219
1220         ir_node *jmp = NULL;
1221         if(get_cur_block() != NULL) {
1222                 jmp = new_Jmp();
1223         }
1224
1225         /* create the header block */
1226         ir_node *header_block = new_immBlock();
1227
1228         /* the false block */
1229         ir_node *false_block = new_immBlock();
1230
1231         /* the loop body */
1232         ir_node *body_block = new_immBlock();
1233         if(jmp != NULL) {
1234                 add_immBlock_pred(body_block, jmp);
1235         }
1236
1237         ir_node *old_continue_label = continue_label;
1238         ir_node *old_break_label    = break_label;
1239         continue_label              = header_block;
1240         break_label                 = false_block;
1241
1242         statement_to_firm(statement->body);
1243
1244         assert(continue_label == header_block);
1245         assert(break_label    == false_block);
1246         continue_label = old_continue_label;
1247         break_label    = old_break_label;
1248
1249         if(get_cur_block() == NULL) {
1250                 mature_immBlock(header_block);
1251                 mature_immBlock(body_block);
1252                 return;
1253         }
1254
1255         ir_node *body_jmp = new_Jmp();
1256         add_immBlock_pred(header_block, body_jmp);
1257         mature_immBlock(header_block);
1258
1259         /* create the condition */
1260         ir_node *condition = _expression_to_firm(statement->condition);
1261         condition          = create_conv(dbgi, condition, mode_b);
1262
1263         ir_node *cond       = new_d_Cond(dbgi, condition);
1264         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1265         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1266
1267         add_immBlock_pred(body_block, true_proj);
1268         mature_immBlock(body_block);
1269
1270         add_immBlock_pred(false_block, false_proj);
1271         mature_immBlock(false_block);
1272
1273         set_cur_block(false_block);
1274 }
1275
1276 static void for_statement_to_firm(for_statement_t *statement)
1277 {
1278         dbg_info *const dbgi = get_dbg_info(&statement->statement.source_position);
1279
1280         ir_node *jmp = NULL;
1281         if (get_cur_block() != NULL) {
1282                 expression_to_firm(statement->initialisation);
1283                 jmp = new_Jmp();
1284         }
1285
1286         /* create the step block */
1287         ir_node *const step_block = new_immBlock();
1288         expression_to_firm(statement->step);
1289         ir_node *const step_jmp   = new_Jmp();
1290
1291         /* create the header block */
1292         ir_node *const header_block = new_immBlock();
1293         if (jmp != NULL) {
1294                 add_immBlock_pred(header_block, jmp);
1295         }
1296         add_immBlock_pred(header_block, step_jmp);
1297
1298         /* create the condition */
1299         ir_node *const cond_expr = _expression_to_firm(statement->condition);
1300         ir_node *const condition = create_conv(dbgi, cond_expr, mode_b);
1301
1302         ir_node *const cond       = new_d_Cond(dbgi, condition);
1303         ir_node *const true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1304         ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1305
1306         /* the false block */
1307         ir_node *const false_block = new_immBlock();
1308         add_immBlock_pred(false_block, false_proj);
1309
1310         /* the loop body */
1311         ir_node *const body_block = new_immBlock();
1312         add_immBlock_pred(body_block, true_proj);
1313         mature_immBlock(body_block);
1314
1315         ir_node *const old_continue_label = continue_label;
1316         ir_node *const old_break_label    = break_label;
1317         continue_label = step_block;
1318         break_label    = false_block;
1319
1320         statement_to_firm(statement->body);
1321
1322         assert(continue_label == step_block);
1323         assert(break_label    == false_block);
1324         continue_label = old_continue_label;
1325         break_label    = old_break_label;
1326
1327         if (get_cur_block() != NULL) {
1328                 ir_node *const jmp = new_Jmp();
1329                 add_immBlock_pred(step_block, jmp);
1330         }
1331
1332         mature_immBlock(step_block);
1333         mature_immBlock(header_block);
1334         mature_immBlock(false_block);
1335
1336         set_cur_block(false_block);
1337 }
1338
1339 static void create_declaration_entity(declaration_t *declaration,
1340                                       declaration_type_t declaration_type,
1341                                       ir_type *parent_type)
1342 {
1343         ident     *id     = new_id_from_str(declaration->symbol->string);
1344         ir_type   *irtype = get_ir_type(declaration->type);
1345         ir_entity *entity = new_entity(parent_type, id, irtype);
1346         set_entity_ld_ident(entity, id);
1347
1348         declaration->declaration_type = declaration_type;
1349         declaration->v.entity         = entity;
1350         set_entity_variability(entity, variability_uninitialized);
1351         /* TODO: visibility? */
1352 }
1353
1354 static void create_initializer(declaration_t *declaration)
1355 {
1356         initializer_t *initializer = declaration->init.initializer;
1357         if(initializer == NULL)
1358                 return;
1359
1360         if(initializer->type == INITIALIZER_VALUE) {
1361                 assert(initializer->designator == NULL);
1362                 assert(initializer->next == NULL);
1363                 ir_node *init_node = expression_to_firm(initializer->v.value);
1364
1365                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1366                         set_value(declaration->v.value_number, init_node);
1367                 } else {
1368                         panic("initializer not completely implemented yet");
1369                 }
1370         } else {
1371                 assert(initializer->type == INITIALIZER_LIST);
1372                 panic("list initializer not supported yet");
1373         }
1374 }
1375
1376 static void create_local_variable(declaration_t *declaration)
1377 {
1378         bool needs_entity = declaration->address_taken;
1379
1380         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1381
1382         if(needs_entity) {
1383                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1384                 create_declaration_entity(declaration,
1385                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1386                                           frame_type);
1387         } else {
1388                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1389                 declaration->v.value_number   = next_value_number_function;
1390                 ++next_value_number_function;
1391         }
1392
1393         create_initializer(declaration);
1394 }
1395
1396 static void declaration_statement_to_firm(declaration_statement_t *statement)
1397 {
1398         declaration_t *declaration = statement->declarations_begin;
1399         declaration_t *end         = statement->declarations_end->next;
1400         for( ; declaration != end; declaration = declaration->next) {
1401                 type_t *type = declaration->type;
1402
1403                 switch(declaration->storage_class) {
1404                 case STORAGE_CLASS_TYPEDEF:
1405                         continue;
1406                 case STORAGE_CLASS_STATIC:
1407                         panic("static local vars not implemented yet");
1408                 case STORAGE_CLASS_ENUM_ENTRY:
1409                         panic("enum entry declaration in local block found");
1410                 case STORAGE_CLASS_EXTERN:
1411                         panic("extern declaration in local block found");
1412                 case STORAGE_CLASS_NONE:
1413                 case STORAGE_CLASS_AUTO:
1414                 case STORAGE_CLASS_REGISTER:
1415                         if(type->type == TYPE_FUNCTION) {
1416                                 panic("nested functions not supported yet");
1417                         } else {
1418                                 create_local_variable(declaration);
1419                         }
1420                         continue;
1421                 }
1422                 panic("invalid storage class found");
1423         }
1424 }
1425
1426 static void create_jump_statement(const statement_t *statement,
1427                                   ir_node *target_block)
1428 {
1429         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1430         ir_node  *jump = new_d_Jmp(dbgi);
1431         add_immBlock_pred(target_block, jump);
1432
1433         set_cur_block(NULL);
1434 }
1435
1436 static void switch_statement_to_firm(const switch_statement_t *statement)
1437 {
1438         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1439
1440         ir_node *expression  = expression_to_firm(statement->expression);
1441         ir_node *cond        = new_d_Cond(dbgi, expression);
1442         ir_node *break_block = new_immBlock();
1443
1444         set_cur_block(NULL);
1445
1446         ir_node *old_switch_cond = current_switch_cond;
1447         ir_node *old_break_label = break_label;
1448         current_switch_cond      = cond;
1449         break_label              = break_block;
1450
1451         statement_to_firm(statement->body);
1452
1453         if(get_cur_block() != NULL) {
1454                 ir_node *jmp = new_Jmp();
1455                 add_immBlock_pred(break_block, jmp);
1456         }
1457
1458         assert(current_switch_cond == cond);
1459         assert(break_label         == break_block);
1460         current_switch_cond = old_switch_cond;
1461         break_label         = old_break_label;
1462
1463         mature_immBlock(break_block);
1464         set_cur_block(break_block);
1465 }
1466
1467 static void case_label_to_firm(const case_label_statement_t *statement)
1468 {
1469         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1470
1471         /* let's create a node and hope firm constant folding creates a Const
1472          * node... */
1473         ir_node *proj;
1474         set_cur_block(get_nodes_block(current_switch_cond));
1475         if(statement->expression) {
1476                 ir_node *cnst = expression_to_firm(statement->expression);
1477                 if(!is_Const(cnst)) {
1478                         panic("couldn't fold constant for case label");
1479                 }
1480                 tarval *tv = get_Const_tarval(cnst);
1481                 if(!mode_is_int(get_tarval_mode(tv))) {
1482                         panic("case label not an integer");
1483                 }
1484
1485                 long pn = get_tarval_long(tv);
1486                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1487                         /* oops someone detected our cheating... */
1488                         panic("magic default pn used");
1489                 }
1490                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1491         } else {
1492                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1493                                          MAGIC_DEFAULT_PN_NUMBER);
1494         }
1495
1496         ir_node *block = new_immBlock();
1497         add_immBlock_pred(block, proj);
1498         mature_immBlock(block);
1499 }
1500
1501 static void statement_to_firm(statement_t *statement)
1502 {
1503         switch(statement->type) {
1504         case STATEMENT_COMPOUND:
1505                 compound_statement_to_firm((compound_statement_t*) statement);
1506                 return;
1507         case STATEMENT_RETURN:
1508                 return_statement_to_firm((return_statement_t*) statement);
1509                 return;
1510         case STATEMENT_EXPRESSION:
1511                 expression_statement_to_firm((expression_statement_t*) statement);
1512                 return;
1513         case STATEMENT_IF:
1514                 if_statement_to_firm((if_statement_t*) statement);
1515                 return;
1516         case STATEMENT_WHILE:
1517                 while_statement_to_firm((while_statement_t*) statement);
1518                 return;
1519         case STATEMENT_DO_WHILE:
1520                 do_while_statement_to_firm((do_while_statement_t*) statement);
1521                 return;
1522         case STATEMENT_DECLARATION:
1523                 declaration_statement_to_firm((declaration_statement_t*) statement);
1524                 return;
1525         case STATEMENT_BREAK:
1526                 create_jump_statement(statement, break_label);
1527                 return;
1528         case STATEMENT_CONTINUE:
1529                 create_jump_statement(statement, continue_label);
1530                 return;
1531         case STATEMENT_SWITCH:
1532                 switch_statement_to_firm((switch_statement_t*) statement);
1533                 return;
1534         case STATEMENT_CASE_LABEL:
1535                 case_label_to_firm((case_label_statement_t*) statement);
1536                 return;
1537         case STATEMENT_FOR:
1538                 for_statement_to_firm((for_statement_t*) statement);
1539                 return;
1540         default:
1541                 break;
1542         }
1543         panic("Statement not implemented\n");
1544 }
1545
1546 static int get_function_n_local_vars(declaration_t *declaration)
1547 {
1548         (void) declaration;
1549         /* TODO */
1550         return 30;
1551 }
1552
1553 static void initialize_function_parameters(declaration_t *declaration)
1554 {
1555         ir_graph *irg         = current_ir_graph;
1556         ir_node  *args        = get_irg_args(irg);
1557         ir_node  *start_block = get_irg_start_block(irg);
1558
1559         int            n         = 0;
1560         declaration_t *parameter = declaration->context.declarations;
1561         for( ; parameter != NULL; parameter = parameter->next) {
1562                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
1563
1564                 if(parameter->address_taken) {
1565                         panic("address take from parameter not implemented yet");
1566                 }
1567
1568                 ir_mode *mode = get_ir_mode(parameter->type);
1569                 long     pn   = n;
1570                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
1571                 ++n;
1572
1573                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1574                 parameter->v.value_number   = next_value_number_function;
1575                 ++next_value_number_function;
1576
1577                 set_value(parameter->v.value_number, proj);
1578         }
1579 }
1580
1581 static void create_function(declaration_t *declaration)
1582 {
1583         ir_entity *entity = get_function_entity(declaration);
1584
1585         if(declaration->init.statement == NULL)
1586                 return;
1587
1588         int       n_local_vars = get_function_n_local_vars(declaration);
1589         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
1590         ir_node  *first_block  = get_cur_block();
1591
1592         next_value_number_function = 0;
1593         initialize_function_parameters(declaration);
1594
1595         statement_to_firm(declaration->init.statement);
1596
1597         ir_node *end_block = get_irg_end_block(irg);
1598
1599         /* do we have a return statement yet? */
1600         if(get_cur_block() != NULL) {
1601                 assert(declaration->type->type == TYPE_FUNCTION);
1602                 const function_type_t* const func_type = (const function_type_t*)declaration->type;
1603                 ir_node *ret;
1604                 if (func_type->result_type == type_void) {
1605                         ret = new_Return(get_store(), 0, NULL);
1606                 } else {
1607                         ir_mode *const mode = get_ir_mode(func_type->result_type);
1608                         ir_node *      in[1];
1609                         // §5.1.2.2.3 main implicitly returns 0
1610                         if (strcmp(declaration->symbol->string, "main") == 0) {
1611                                 in[0] = new_Const(mode, get_mode_null(mode));
1612                         } else {
1613                                 in[0] = new_Unknown(mode);
1614                         }
1615                         ret = new_Return(get_store(), 1, in);
1616                 }
1617                 add_immBlock_pred(end_block, ret);
1618         }
1619
1620         mature_immBlock(first_block);
1621         mature_immBlock(end_block);
1622
1623         irg_finalize_cons(irg);
1624
1625         /* finalize the frame type */
1626         ir_type *frame_type = get_irg_frame_type(irg);
1627         int      n          = get_compound_n_members(frame_type);
1628         int      align_all  = 4;
1629         int      offset     = 0;
1630         for(int i = 0; i < n; ++i) {
1631                 ir_entity *entity      = get_compound_member(frame_type, i);
1632                 ir_type   *entity_type = get_entity_type(entity);
1633
1634                 int align = get_type_alignment_bytes(entity_type);
1635                 if(align > align_all)
1636                         align_all = align;
1637                 int misalign = 0;
1638                 if(align > 0) {
1639                         misalign  = offset % align;
1640                         offset   += misalign;
1641                 }
1642
1643                 set_entity_offset(entity, offset);
1644                 offset += get_type_size_bytes(entity_type);
1645         }
1646         set_type_size_bytes(frame_type, offset);
1647         set_type_alignment_bytes(frame_type, align_all);
1648         set_type_state(frame_type, layout_fixed);
1649
1650         irg_vrfy(irg);
1651 }
1652
1653 static void context_to_firm(context_t *context)
1654 {
1655         declaration_t *declaration = context->declarations;
1656         for( ; declaration != NULL; declaration = declaration->next) {
1657                 if(declaration->namespace != NAMESPACE_NORMAL)
1658                         continue;
1659
1660                 type_t *type = declaration->type;
1661                 if(type->type == TYPE_FUNCTION) {
1662                         create_function(declaration);
1663                 } else {
1664                         /* TODO... */
1665                 }
1666         }
1667 }
1668
1669 void translation_unit_to_firm(translation_unit_t *unit)
1670 {
1671         /* remove me later TODO FIXME */
1672         (void) get_type_size;
1673
1674         /* just to be sure */
1675         continue_label      = NULL;
1676         break_label         = NULL;
1677         current_switch_cond = NULL;
1678
1679         context_to_firm(& unit->context);
1680 }