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
  20 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  21
  22 static ir_type *ir_type_const_char;
  23 static ir_type *ir_type_void;
  24 static ir_type *ir_type_int;
  25 static ir_type *ir_type_void_ptr;
  26
  27 static type_t *type_const_char;
  28 static type_t *type_void;
  29 static type_t *type_int;
  30
  31 static int       next_value_number_function;
  32 static ir_node  *continue_label;
  33 static ir_node  *break_label;
  34 static ir_node  *current_switch_cond;
  35 static ir_node **imature_blocks;
  36
  37 typedef enum declaration_type_t {
  38         DECLARATION_TYPE_UNKNOWN,
  39         DECLARATION_TYPE_FUNCTION,
  40         DECLARATION_TYPE_GLOBAL_VARIABLE,
  41         DECLARATION_TYPE_LOCAL_VARIABLE,
  42         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  43         DECLARATION_TYPE_COMPOUND_MEMBER,
  44         DECLARATION_TYPE_LABEL_BLOCK,
  45 } declaration_type_t;
  46
  47 static ir_type *get_ir_type(type_t *type);
  48
  49 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  50 {
  51         (void) pos;
  52 #if 0
  53         const declaration_t *declaration = & value_numbers[pos]->declaration;
  54
  55         print_warning_prefix(declaration->source_position);
  56         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  57                         declaration->symbol->string);
  58 #endif
  59         fprintf(stderr, "Some variable might be used uninitialized\n");
  60         return new_r_Unknown(irg, mode);
  61 }
  62
  63 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  64 {
  65         const source_position_t *pos = (const source_position_t*) dbg;
  66         if(pos == NULL)
  67                 return 0;
  68         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  69                                    pos->linenr);
  70 }
  71
  72 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  73 {
  74         const source_position_t *pos = (const source_position_t*) dbg;
  75         if(pos == NULL)
  76                 return NULL;
  77         if(line != NULL)
  78                 *line = pos->linenr;
  79         return pos->input_name;
  80 }
  81
  82 void init_ast2firm(void)
  83 {
  84         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  85         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  86         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  87
  88         ir_type_int        = get_ir_type(type_int);
  89         ir_type_const_char = get_ir_type(type_const_char);
  90         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  91                                                        type in firm */
  92         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  93                                               ir_type_void, mode_P_data);
  94
  95         type_void->firm_type = ir_type_void;
  96 }
  97
  98 void exit_ast2firm(void)
  99 {
 100 }
 101
 102 static unsigned unique_id = 0;
 103
 104 static ident *unique_ident(const char *tag)
 105 {
 106         char buf[256];
 107
 108         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 109         unique_id++;
 110         return new_id_from_str(buf);
 111 }
 112
 113 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 114 {
 115         switch(atomic_type->atype) {
 116         case ATOMIC_TYPE_SCHAR:
 117         case ATOMIC_TYPE_CHAR:
 118                 return mode_Bs;
 119         case ATOMIC_TYPE_UCHAR:
 120                 return mode_Bu;
 121         case ATOMIC_TYPE_SHORT:
 122                 return mode_Hs;
 123         case ATOMIC_TYPE_USHORT:
 124                 return mode_Hu;
 125         case ATOMIC_TYPE_LONG:
 126         case ATOMIC_TYPE_INT:
 127                 return mode_Is;
 128         case ATOMIC_TYPE_ULONG:
 129         case ATOMIC_TYPE_UINT:
 130                 return mode_Iu;
 131         case ATOMIC_TYPE_LONGLONG:
 132                 return mode_Ls;
 133         case ATOMIC_TYPE_ULONGLONG:
 134                 return mode_Lu;
 135         case ATOMIC_TYPE_FLOAT:
 136                 return mode_F;
 137         case ATOMIC_TYPE_DOUBLE:
 138                 return mode_D;
 139         case ATOMIC_TYPE_LONG_DOUBLE:
 140                 return mode_E;
 141         case ATOMIC_TYPE_BOOL:
 142                 return mode_b;
 143 #ifdef PROVIDE_COMPLEX
 144         case ATOMIC_TYPE_FLOAT_COMPLEX:
 145         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 146         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 147                 panic("complex lowering not implemented yet");
 148                 break;
 149         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 150         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 151         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 152                 panic("imaginary lowering not implemented yet");
 153                 break;
 154 #endif
 155         case ATOMIC_TYPE_VOID:
 156                 /* firm has no real void... */
 157                 return mode_Is;
 158         case ATOMIC_TYPE_INVALID:
 159                 break;
 160         }
 161         panic("Encountered unknown atomic type");
 162 }
 163
 164
 165 static unsigned get_type_size(type_t *type);
 166
 167 static unsigned get_atomic_type_size(const atomic_type_t *type)
 168 {
 169         switch(type->atype) {
 170         case ATOMIC_TYPE_CHAR:
 171         case ATOMIC_TYPE_SCHAR:
 172         case ATOMIC_TYPE_UCHAR:
 173                 return 1;
 174
 175         case ATOMIC_TYPE_SHORT:
 176         case ATOMIC_TYPE_USHORT:
 177                 return 2;
 178
 179         case ATOMIC_TYPE_BOOL:
 180         case ATOMIC_TYPE_INT:
 181         case ATOMIC_TYPE_UINT:
 182         case ATOMIC_TYPE_LONG:
 183         case ATOMIC_TYPE_ULONG:
 184         case ATOMIC_TYPE_FLOAT:
 185                 return 4;
 186
 187         case ATOMIC_TYPE_LONGLONG:
 188         case ATOMIC_TYPE_ULONGLONG:
 189         case ATOMIC_TYPE_DOUBLE:
 190                 return 8;
 191
 192         case ATOMIC_TYPE_LONG_DOUBLE:
 193                 return 12;
 194
 195         case ATOMIC_TYPE_VOID:
 196                 return 1;
 197
 198         case ATOMIC_TYPE_INVALID:
 199                 break;
 200         }
 201         panic("Trying to determine size of invalid atomic type");
 202 }
 203
 204 static unsigned get_compound_type_size(compound_type_t *type)
 205 {
 206         ir_type *irtype = get_ir_type(&type->type);
 207         return get_type_size_bytes(irtype);
 208 }
 209
 210 static unsigned get_array_type_size(array_type_t *type)
 211 {
 212         ir_type *irtype = get_ir_type(&type->type);
 213         return get_type_size_bytes(irtype);
 214 }
 215
 216 static unsigned get_type_size(type_t *type)
 217 {
 218         type = skip_typeref(type);
 219
 220         switch(type->type) {
 221         case TYPE_ATOMIC:
 222                 return get_atomic_type_size((const atomic_type_t*) type);
 223         case TYPE_ENUM:
 224                 return get_mode_size_bytes(mode_Is);
 225         case TYPE_COMPOUND_UNION:
 226         case TYPE_COMPOUND_STRUCT:
 227                 return get_compound_type_size((compound_type_t*) type);
 228         case TYPE_FUNCTION:
 229                 /* just a pointer to the function */
 230                 return get_mode_size_bytes(mode_P_code);
 231         case TYPE_POINTER:
 232                 return get_mode_size_bytes(mode_P_data);
 233         case TYPE_ARRAY:
 234                 return get_array_type_size((array_type_t*) type);
 235         case TYPE_BUILTIN:
 236         case TYPE_TYPEDEF:
 237         case TYPE_TYPEOF:
 238         case TYPE_INVALID:
 239                 break;
 240         }
 241         panic("Trying to determine size of invalid type");
 242 }
 243
 244 static unsigned count_parameters(const function_type_t *function_type)
 245 {
 246         unsigned count = 0;
 247
 248         function_parameter_t *parameter = function_type->parameters;
 249         for ( ; parameter != NULL; parameter = parameter->next) {
 250                 ++count;
 251         }
 252
 253         return count;
 254 }
 255
 256
 257
 258
 259 static long fold_constant(const expression_t *expression);
 260
 261 static ir_type *create_atomic_type(const atomic_type_t *type)
 262 {
 263         ir_mode *mode   = get_atomic_mode(type);
 264         ident   *id     = get_mode_ident(mode);
 265         ir_type *irtype = new_type_primitive(id, mode);
 266
 267         return irtype;
 268 }
 269
 270 static ir_type *create_method_type(const function_type_t *function_type)
 271 {
 272         type_t  *result_type  = function_type->result_type;
 273
 274         ident   *id           = unique_ident("functiontype");
 275         int      n_parameters = count_parameters(function_type);
 276         int      n_results    = result_type == type_void ? 0 : 1;
 277         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 278
 279         if(result_type != type_void) {
 280                 ir_type *restype = get_ir_type(result_type);
 281                 set_method_res_type(irtype, 0, restype);
 282         }
 283
 284         function_parameter_t *parameter = function_type->parameters;
 285         int                   n         = 0;
 286         for( ; parameter != NULL; parameter = parameter->next) {
 287                 ir_type *p_irtype = get_ir_type(parameter->type);
 288                 set_method_param_type(irtype, n, p_irtype);
 289                 ++n;
 290         }
 291
 292         if(function_type->variadic || function_type->unspecified_parameters) {
 293                 set_method_variadicity(irtype, variadicity_variadic);
 294         }
 295
 296         return irtype;
 297 }
 298
 299 static ir_type *create_pointer_type(pointer_type_t *type)
 300 {
 301         type_t  *points_to = type->points_to;
 302         ir_type *ir_points_to;
 303         /* Avoid endless recursion if the points_to type contains this poiner type
 304          * again (might be a struct). We therefore first create a void* pointer
 305          * and then set the real points_to type
 306          */
 307         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 308                                             ir_type_void, mode_P_data);
 309         type->type.firm_type  = ir_type;
 310
 311         ir_points_to = get_ir_type(points_to);
 312         set_pointer_points_to_type(ir_type, ir_points_to);
 313
 314         return ir_type;
 315 }
 316
 317 static ir_type *create_array_type(array_type_t *type)
 318 {
 319         type_t  *element_type    = type->element_type;
 320         ir_type *ir_element_type = get_ir_type(element_type);
 321
 322         ident   *id      = unique_ident("array");
 323         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 324
 325         if(type->size != NULL) {
 326                 int n_elements = fold_constant(type->size);
 327
 328                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 329
 330                 size_t elemsize = get_type_size_bytes(ir_element_type);
 331                 int align = get_type_alignment_bytes(ir_element_type);
 332                 if(elemsize % align > 0) {
 333                         elemsize += align - (elemsize % align);
 334                 }
 335                 set_type_size_bytes(ir_type, n_elements * elemsize);
 336                 set_type_alignment_bytes(ir_type, align);
 337                 set_type_state(ir_type, layout_fixed);
 338         }
 339
 340         return ir_type;
 341 }
 342
 343 #define INVALID_TYPE ((ir_type_ptr)-1)
 344
 345 static ir_type *create_struct_type(compound_type_t *type)
 346 {
 347         symbol_t *symbol = type->declaration->symbol;
 348         ident    *id;
 349         if(symbol != NULL) {
 350                 id = unique_ident(symbol->string);
 351         } else {
 352                 id = unique_ident("__anonymous_struct");
 353         }
 354         ir_type *ir_type = new_type_struct(id);
 355
 356         type->type.firm_type = ir_type;
 357
 358         int align_all = 1;
 359         int offset    = 0;
 360         declaration_t *entry = type->declaration->context.declarations;
 361         for( ; entry != NULL; entry = entry->next) {
 362                 if(entry->namespace != NAMESPACE_NORMAL)
 363                         continue;
 364
 365                 ident       *ident         = new_id_from_str(entry->symbol->string);
 366                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 367
 368                 int entry_size      = get_type_size_bytes(entry_ir_type);
 369                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 370                 int misalign = offset % entry_alignment;
 371                 offset += misalign;
 372
 373                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 374                 set_entity_offset(entity, offset);
 375                 add_struct_member(ir_type, entity);
 376                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 377                 entry->v.entity         = entity;
 378
 379                 offset += entry_size;
 380                 if(entry_alignment > align_all) {
 381                         if(entry_alignment % align_all != 0) {
 382                                 panic("Uneven alignments not supported yet");
 383                         }
 384                         align_all = entry_alignment;
 385                 }
 386         }
 387
 388         int misalign = offset % align_all;
 389         offset += misalign;
 390         set_type_alignment_bytes(ir_type, align_all);
 391         set_type_size_bytes(ir_type, offset);
 392         set_type_state(ir_type, layout_fixed);
 393
 394         return ir_type;
 395 }
 396
 397 static ir_type *create_union_type(compound_type_t *type)
 398 {
 399         declaration_t *declaration = type->declaration;
 400         symbol_t      *symbol      = declaration->symbol;
 401         ident         *id;
 402         if(symbol != NULL) {
 403                 id = unique_ident(symbol->string);
 404         } else {
 405                 id = unique_ident("__anonymous_union");
 406         }
 407         ir_type  *ir_type = new_type_union(id);
 408
 409         type->type.firm_type = ir_type;
 410
 411         int align_all = 1;
 412         int size      = 0;
 413         declaration_t *entry = declaration->context.declarations;
 414         for( ; entry != NULL; entry = entry->next) {
 415                 if(entry->namespace != NAMESPACE_NORMAL)
 416                         continue;
 417
 418                 ident       *ident         = new_id_from_str(entry->symbol->string);
 419                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 420
 421                 int entry_size      = get_type_size_bytes(entry_ir_type);
 422                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 423
 424                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 425                 add_union_member(ir_type, entity);
 426                 set_entity_offset(entity, 0);
 427                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 428                 entry->v.entity         = entity;
 429
 430                 if(entry_size > size) {
 431                         size = entry_size;
 432                 }
 433                 if(entry_alignment > align_all) {
 434                         if(entry_alignment % align_all != 0) {
 435                                 panic("Uneven alignments not supported yet");
 436                         }
 437                         align_all = entry_alignment;
 438                 }
 439         }
 440
 441         set_type_alignment_bytes(ir_type, align_all);
 442         set_type_size_bytes(ir_type, size);
 443         set_type_state(ir_type, layout_fixed);
 444
 445         return ir_type;
 446 }
 447
 448 static ir_type *get_ir_type(type_t *type)
 449 {
 450         assert(type != NULL);
 451
 452         type = skip_typeref(type);
 453
 454         if(type->firm_type != NULL) {
 455                 assert(type->firm_type != INVALID_TYPE);
 456                 return type->firm_type;
 457         }
 458
 459         ir_type *firm_type = NULL;
 460         switch(type->type) {
 461         case TYPE_ATOMIC:
 462                 firm_type = create_atomic_type((atomic_type_t*) type);
 463                 break;
 464         case TYPE_FUNCTION:
 465                 firm_type = create_method_type((function_type_t*) type);
 466                 break;
 467         case TYPE_POINTER:
 468                 firm_type = create_pointer_type((pointer_type_t*) type);
 469                 break;
 470         case TYPE_ARRAY:
 471                 firm_type = create_array_type((array_type_t*) type);
 472                 break;
 473         case TYPE_COMPOUND_STRUCT:
 474                 firm_type = create_struct_type((compound_type_t*) type);
 475                 break;
 476         case TYPE_COMPOUND_UNION:
 477                 firm_type = create_union_type((compound_type_t*) type);
 478                 break;
 479         case TYPE_ENUM:
 480                 firm_type = ir_type_int;
 481                 break;
 482         case TYPE_BUILTIN:
 483         case TYPE_TYPEOF:
 484         case TYPE_TYPEDEF:
 485         case TYPE_INVALID:
 486                 break;
 487         }
 488         if(firm_type == NULL)
 489                 panic("unknown type found");
 490
 491         type->firm_type = firm_type;
 492         return firm_type;
 493 }
 494
 495 static inline ir_mode *get_ir_mode(type_t *type)
 496 {
 497         ir_type *irtype = get_ir_type(type);
 498
 499         /* firm doesn't report a mode for arrays somehow... */
 500         if(is_Array_type(irtype)) {
 501                 return mode_P;
 502         }
 503
 504         ir_mode *mode   = get_type_mode(irtype);
 505         assert(mode != NULL);
 506         return mode;
 507 }
 508
 509 static ir_entity* get_function_entity(declaration_t *declaration)
 510 {
 511         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 512                 return declaration->v.entity;
 513         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 514
 515         symbol_t *symbol = declaration->symbol;
 516         ident    *id     = new_id_from_str(symbol->string);
 517
 518         ir_type  *global_type    = get_glob_type();
 519         ir_type  *ir_type_method = get_ir_type(declaration->type);
 520         assert(is_Method_type(ir_type_method));
 521
 522         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 523         set_entity_ld_ident(entity, id);
 524         if(declaration->storage_class == STORAGE_CLASS_STATIC
 525                         || declaration->is_inline) {
 526                 set_entity_visibility(entity, visibility_local);
 527         } else if(declaration->init.statement != NULL) {
 528                 set_entity_visibility(entity, visibility_external_visible);
 529         } else {
 530                 set_entity_visibility(entity, visibility_external_allocated);
 531         }
 532
 533         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 534         declaration->v.entity         = entity;
 535
 536         return entity;
 537 }
 538
 539
 540
 541 static ir_node *expression_to_firm(const expression_t *expression);
 542 static ir_node *expression_to_modeb(const expression_t *expression);
 543
 544 static dbg_info *get_dbg_info(const source_position_t *pos)
 545 {
 546         return (dbg_info*) pos;
 547 }
 548
 549 static ir_node *const_to_firm(const const_t *cnst)
 550 {
 551         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 552         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 553
 554         tarval   *tv;
 555         if(mode_is_float(mode)) {
 556                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 557         } else {
 558                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 559         }
 560
 561         return new_d_Const(dbgi, mode, tv);
 562 }
 563
 564 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 565 {
 566         assert(entity != NULL);
 567         union symconst_symbol sym;
 568         sym.entity_p = entity;
 569         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 570 }
 571
 572 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 573 {
 574         ir_type   *global_type = get_glob_type();
 575         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 576                                                 ir_type_const_char);
 577
 578         ident     *id     = unique_ident("Lstr");
 579         ir_entity *entity = new_entity(global_type, id, type);
 580         set_entity_ld_ident(entity, id);
 581         set_entity_variability(entity, variability_constant);
 582
 583         ir_type    *elem_type = ir_type_const_char;
 584         ir_mode    *mode      = get_type_mode(elem_type);
 585
 586         const char *string = literal->value;
 587         size_t      slen   = strlen(string) + 1;
 588
 589         set_array_lower_bound_int(type, 0, 0);
 590         set_array_upper_bound_int(type, 0, slen);
 591         set_type_size_bytes(type, slen);
 592         set_type_state(type, layout_fixed);
 593
 594         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 595         for(size_t i = 0; i < slen; ++i) {
 596                 tvs[i] = new_tarval_from_long(string[i], mode);
 597         }
 598
 599         set_array_entity_values(entity, tvs, slen);
 600         free(tvs);
 601
 602         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 603
 604         return create_symconst(dbgi, entity);
 605 }
 606
 607 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 608                                           dbg_info *dbgi)
 609 {
 610         ir_mode *mode     = get_ir_mode(type);
 611         ir_node *memory   = get_store();
 612         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 613         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 614         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 615         set_store(load_mem);
 616
 617         return load_res;
 618 }
 619
 620 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 621 {
 622         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 623         declaration_t *declaration = ref->declaration;
 624         type_t        *type        = skip_typeref(declaration->type);
 625         ir_mode       *mode        = get_ir_mode(type);
 626
 627         switch((declaration_type_t) declaration->declaration_type) {
 628         case DECLARATION_TYPE_UNKNOWN:
 629                 break;
 630         case DECLARATION_TYPE_LOCAL_VARIABLE:
 631                 return get_value(declaration->v.value_number, mode);
 632         case DECLARATION_TYPE_FUNCTION: {
 633                 return create_symconst(dbgi, declaration->v.entity);
 634         }
 635         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 636                 ir_entity *entity   = declaration->v.entity;
 637                 ir_node   *symconst = create_symconst(dbgi, entity);
 638
 639                 if(type->type == TYPE_ARRAY) {
 640                         return symconst;
 641                 } else {
 642                         return load_from_expression_addr(type, symconst, dbgi);
 643                 }
 644         }
 645         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 646         case DECLARATION_TYPE_COMPOUND_MEMBER:
 647         case DECLARATION_TYPE_LABEL_BLOCK:
 648                 panic("not implemented reference type");
 649         }
 650
 651         panic("reference to declaration with unknown type found");
 652 }
 653
 654 static ir_node *reference_addr(const reference_expression_t *ref)
 655 {
 656         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 657         declaration_t *declaration = ref->declaration;
 658
 659         switch((declaration_type_t) declaration->declaration_type) {
 660         case DECLARATION_TYPE_UNKNOWN:
 661                 break;
 662         case DECLARATION_TYPE_LOCAL_VARIABLE:
 663                 panic("local variable without entity has no address");
 664         case DECLARATION_TYPE_FUNCTION: {
 665                 return create_symconst(dbgi, declaration->v.entity);
 666         }
 667         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 668                 ir_entity *entity   = declaration->v.entity;
 669                 ir_node   *symconst = create_symconst(dbgi, entity);
 670                 return symconst;
 671         }
 672         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 673         case DECLARATION_TYPE_COMPOUND_MEMBER:
 674         case DECLARATION_TYPE_LABEL_BLOCK:
 675                 panic("not implemented reference type");
 676         }
 677
 678         panic("reference to declaration with unknown type found");
 679 }
 680
 681 static ir_node *call_expression_to_firm(const call_expression_t *call)
 682 {
 683         assert(get_cur_block() != NULL);
 684
 685         expression_t  *function = call->function;
 686         ir_node       *callee   = expression_to_firm(function);
 687
 688         assert(function->datatype->type == TYPE_FUNCTION);
 689         function_type_t *function_type = (function_type_t*) function->datatype;
 690
 691         int              n_parameters = 0;
 692         call_argument_t *argument     = call->arguments;
 693         for( ; argument != NULL; argument = argument->next) {
 694                 ++n_parameters;
 695         }
 696
 697         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 698         ir_type *new_method_type = NULL;
 699         if(function_type->variadic || function_type->unspecified_parameters) {
 700                 /* we need to construct a new method type matching the call
 701                  * arguments... */
 702                 int n_res       = get_method_n_ress(ir_method_type);
 703                 new_method_type = new_type_method(unique_ident("calltype"),
 704                                                   n_parameters, n_res);
 705                 set_method_calling_convention(new_method_type,
 706                                get_method_calling_convention(ir_method_type));
 707                 set_method_additional_properties(new_method_type,
 708                                get_method_additional_properties(ir_method_type));
 709
 710                 for(int i = 0; i < n_res; ++i) {
 711                         set_method_res_type(new_method_type, i,
 712                                             get_method_res_type(ir_method_type, i));
 713                 }
 714         }
 715         ir_node *in[n_parameters];
 716
 717         argument = call->arguments;
 718         int n = 0;
 719         for( ; argument != NULL; argument = argument->next) {
 720                 expression_t *expression = argument->expression;
 721                 ir_node      *arg_node   = expression_to_firm(expression);
 722
 723                 in[n] = arg_node;
 724                 if(new_method_type != NULL) {
 725                         ir_type *irtype = get_ir_type(expression->datatype);
 726                         set_method_param_type(new_method_type, n, irtype);
 727                 }
 728
 729                 n++;
 730         }
 731         assert(n == n_parameters);
 732
 733         if(new_method_type != NULL)
 734                 ir_method_type = new_method_type;
 735
 736         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 737         ir_node  *store = get_store();
 738         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 739                                      ir_method_type);
 740         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 741         set_store(mem);
 742
 743         type_t  *result_type = function_type->result_type;
 744         ir_node *result      = NULL;
 745         if(result_type != type_void) {
 746                 ir_mode *mode    = get_ir_mode(result_type);
 747                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 748                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 749         }
 750
 751         return result;
 752 }
 753
 754 static ir_node *expression_to_addr(const expression_t *expression);
 755
 756 static void set_value_for_expression(const expression_t *expression,
 757                                      ir_node *value)
 758 {
 759         if(expression->type == EXPR_REFERENCE) {
 760                 reference_expression_t *ref = (reference_expression_t*) expression;
 761
 762                 declaration_t *declaration = ref->declaration;
 763                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 764                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 765                         set_value(declaration->v.value_number, value);
 766                         return;
 767                 }
 768         }
 769
 770         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 771         ir_node  *addr      = expression_to_addr(expression);
 772         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 773         ir_node  *memory    = get_store();
 774         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 775         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 776         set_store(store_mem);
 777 }
 778
 779 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 780 {
 781         ir_mode *value_mode = get_irn_mode(value);
 782
 783         if(value_mode == dest_mode)
 784                 return value;
 785
 786         if(dest_mode == mode_b) {
 787                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 788                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 789                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 790                 return proj;
 791         }
 792
 793         return new_d_Conv(dbgi, value, dest_mode);
 794 }
 795
 796 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 797 {
 798         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 799         type_t   *type = expression->expression.datatype;
 800         ir_mode  *mode = get_ir_mode(type);
 801
 802         if(expression->type == UNEXPR_TAKE_ADDRESS)
 803                 return expression_to_addr(expression->value);
 804
 805         const expression_t *value      = expression->value;
 806         ir_node            *value_node = expression_to_firm(value);
 807
 808         switch(expression->type) {
 809         case UNEXPR_NEGATE:
 810                 return new_d_Minus(dbgi, value_node, mode);
 811         case UNEXPR_PLUS:
 812                 return value_node;
 813         case UNEXPR_BITWISE_NEGATE:
 814                 return new_d_Not(dbgi, value_node, mode);
 815         case UNEXPR_NOT:
 816                 if(get_irn_mode(value_node) != mode_b) {
 817                         value_node = create_conv(dbgi, value_node, mode_b);
 818                 }
 819                 value_node = new_d_Not(dbgi, value_node, mode_b);
 820                 if(mode != mode_b) {
 821                         value_node = create_conv(dbgi, value_node, mode);
 822                 }
 823                 return value_node;
 824         case UNEXPR_DEREFERENCE:
 825                 return load_from_expression_addr(type, value_node, dbgi);
 826         case UNEXPR_POSTFIX_INCREMENT: {
 827                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 828                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 829                 set_value_for_expression(value, new_value);
 830                 return value_node;
 831         }
 832         case UNEXPR_POSTFIX_DECREMENT: {
 833                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 834                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 835                 set_value_for_expression(value, new_value);
 836                 return value_node;
 837         }
 838         case UNEXPR_PREFIX_INCREMENT: {
 839                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 840                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 841                 set_value_for_expression(value, new_value);
 842                 return new_value;
 843         }
 844         case UNEXPR_PREFIX_DECREMENT: {
 845                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 846                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 847                 set_value_for_expression(value, new_value);
 848                 return new_value;
 849         }
 850         case UNEXPR_CAST:
 851                 return create_conv(dbgi, value_node, mode);
 852
 853         case UNEXPR_TAKE_ADDRESS:
 854         case UNEXPR_INVALID:
 855                 break;
 856         }
 857         panic("invalid UNEXPR type found");
 858 }
 859
 860 static long get_pnc(binary_expression_type_t type)
 861 {
 862         switch(type) {
 863         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 864         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 865         case BINEXPR_LESS:         return pn_Cmp_Lt;
 866         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 867         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 868         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 869         default:
 870                 break;
 871         }
 872         panic("trying to get pn_Cmp from non-comparison binexpr type");
 873 }
 874
 875 static ir_node *create_lazy_op(const binary_expression_t *expression)
 876 {
 877         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 878
 879         bool is_or = (expression->type == BINEXPR_LOGICAL_OR);
 880         assert(is_or || expression->type == BINEXPR_LOGICAL_AND);
 881
 882         ir_node  *val1       = expression_to_modeb(expression->left);
 883         ir_node  *cond       = new_d_Cond(dbgi, val1);
 884         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 885         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 886
 887         ir_node *fallthrough_block = new_immBlock();
 888
 889         /* the true case */
 890         ir_node *calc_val2_block = new_immBlock();
 891         if(is_or) {
 892                 add_immBlock_pred(calc_val2_block, false_proj);
 893         } else {
 894                 add_immBlock_pred(calc_val2_block, true_proj);
 895         }
 896
 897         mature_immBlock(calc_val2_block);
 898
 899         ir_node *val2 = expression_to_modeb(expression->right);
 900         if(get_cur_block() != NULL) {
 901                 ir_node *jmp = new_d_Jmp(dbgi);
 902                 add_immBlock_pred(fallthrough_block, jmp);
 903         }
 904
 905         /* fallthrough */
 906         ir_node *constb;
 907         if(is_or) {
 908                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_true());
 909                 add_immBlock_pred(fallthrough_block, true_proj);
 910         } else {
 911                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_false());
 912                 add_immBlock_pred(fallthrough_block, false_proj);
 913         }
 914         mature_immBlock(fallthrough_block);
 915
 916         set_cur_block(fallthrough_block);
 917
 918         ir_node *in[2] = { val2, constb };
 919         ir_node *val   = new_d_Phi(dbgi, 2, in, mode_b);
 920
 921         return val;
 922 }
 923
 924 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 925                                             ir_node *right, ir_mode *mode);
 926
 927 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 928                                         create_arithmetic_func func)
 929 {
 930         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 931         ir_node  *left  = expression_to_firm(expression->left);
 932         ir_node  *right = expression_to_firm(expression->right);
 933         type_t   *type  = expression->right->datatype;
 934         /* be careful with the modes, because in asithmetic assign nodes only
 935          * the right operand has the mode of the arithmetic alread */
 936         ir_mode  *mode  = get_ir_mode(type);
 937         left            = create_conv(dbgi, left, mode);
 938         ir_node  *res   = func(dbgi, left, right, mode);
 939
 940         return res;
 941 }
 942
 943 static ir_node *create_arithmetic_assign_binop(
 944                 const binary_expression_t *expression, create_arithmetic_func func)
 945 {
 946         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 947         ir_node  *value = create_arithmetic_binop(expression, func);
 948         type_t   *type  = expression->expression.datatype;
 949         ir_mode  *mode  = get_ir_mode(type);
 950
 951         assert(type->type != TYPE_POINTER);
 952
 953         value = create_conv(dbgi, value, mode);
 954         set_value_for_expression(expression->left, value);
 955
 956         return value;
 957 }
 958
 959 static ir_node *create_add(const binary_expression_t *expression)
 960 {
 961         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 962         ir_node  *left  = expression_to_firm(expression->left);
 963         ir_node  *right = expression_to_firm(expression->right);
 964         type_t   *type  = expression->expression.datatype;
 965         ir_mode  *mode  = get_ir_mode(type);
 966
 967         expression_t *expr_left  = expression->left;
 968         expression_t *expr_right = expression->right;
 969         type_t       *type_left  = skip_typeref(expr_left->datatype);
 970         type_t       *type_right = skip_typeref(expr_right->datatype);
 971
 972         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
 973                 return new_d_Add(dbgi, left, right, mode);
 974         }
 975
 976         ir_node        *pointer;
 977         ir_node        *integer;
 978         pointer_type_t *pointer_type;
 979         if(type_left->type == TYPE_POINTER) {
 980                 pointer      = left;
 981                 integer      = right;
 982                 pointer_type = (pointer_type_t*) type_left;
 983         } else {
 984                 assert(type_right->type == TYPE_POINTER);
 985                 pointer      = right;
 986                 integer      = left;
 987                 pointer_type = (pointer_type_t*) type_right;
 988         }
 989
 990         type_t   *points_to = pointer_type->points_to;
 991         unsigned  elem_size = get_type_size(points_to);
 992
 993         assert(elem_size >= 1);
 994         if(elem_size > 1) {
 995                 integer       = create_conv(dbgi, integer, mode_Is);
 996                 ir_node *cnst = new_Const_long(mode_Is, (int) elem_size);
 997                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
 998                 integer = mul;
 999         }
1000
1001         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
1002
1003         return res;
1004 }
1005
1006 static ir_node *create_sub(const binary_expression_t *expression)
1007 {
1008         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1009         ir_node  *left  = expression_to_firm(expression->left);
1010         ir_node  *right = expression_to_firm(expression->right);
1011         type_t   *type  = expression->expression.datatype;
1012         ir_mode  *mode  = get_ir_mode(type);
1013
1014         expression_t *expr_left  = expression->left;
1015         expression_t *expr_right = expression->right;
1016         type_t       *type_left  = skip_typeref(expr_left->datatype);
1017         type_t       *type_right = skip_typeref(expr_right->datatype);
1018
1019         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
1020                         || (type_left->type == TYPE_POINTER
1021                                 && type_right->type == TYPE_POINTER)) {
1022                 return new_d_Sub(dbgi, left, right, mode);
1023         }
1024
1025         assert(type_right->type == TYPE_POINTER);
1026         ir_node        *pointer      = left;
1027         ir_node        *integer      = right;
1028         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
1029
1030         type_t   *points_to = pointer_type->points_to;
1031         unsigned  elem_size = get_type_size(points_to);
1032
1033         assert(elem_size >= 1);
1034         if(elem_size > 1) {
1035                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
1036                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
1037                 integer = mul;
1038         }
1039
1040         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
1041
1042         return res;
1043 }
1044
1045 static ir_node *create_shift(const binary_expression_t *expression)
1046 {
1047         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1048         ir_node  *left  = expression_to_firm(expression->left);
1049         ir_node  *right = expression_to_firm(expression->right);
1050         type_t   *type  = expression->expression.datatype;
1051         ir_mode  *mode  = get_ir_mode(type);
1052
1053         /* firm always wants the shift count to be unsigned */
1054         right = create_conv(dbgi, right, mode_Iu);
1055
1056         ir_node *res;
1057
1058         switch(expression->type) {
1059         case BINEXPR_SHIFTLEFT:
1060                 res = new_d_Shl(dbgi, left, right, mode);
1061                 break;
1062         case BINEXPR_SHIFTRIGHT: {
1063                  expression_t *expr_left = expression->left;
1064                  type_t       *type_left = skip_typeref(expr_left->datatype);
1065
1066                  if(is_type_signed(type_left)) {
1067                         res = new_d_Shrs(dbgi, left, right, mode);
1068                  } else {
1069                          res = new_d_Shr(dbgi, left, right, mode);
1070                  }
1071                  break;
1072         }
1073         default:
1074                 panic("create shift op called for non-shift op");
1075         }
1076
1077         return res;
1078 }
1079
1080
1081 static ir_node *create_divmod(const binary_expression_t *expression)
1082 {
1083         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1084         ir_node  *left  = expression_to_firm(expression->left);
1085         ir_node  *right = expression_to_firm(expression->right);
1086         ir_node  *pin   = new_Pin(new_NoMem());
1087         type_t   *type  = expression->expression.datatype;
1088         ir_mode  *mode  = get_ir_mode(type);
1089         ir_node  *op;
1090         ir_node  *res;
1091
1092         if(expression->type == BINEXPR_DIV) {
1093                 if(mode_is_float(mode)) {
1094                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1095                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1096                 } else {
1097                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1098                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1099                 }
1100         } else {
1101                 assert(expression->type == BINEXPR_MOD);
1102                 assert(!mode_is_float(mode));
1103                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1104                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1105         }
1106
1107         return res;
1108 }
1109
1110
1111
1112 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1113 {
1114         binary_expression_type_t type = expression->type;
1115         switch(type) {
1116         case BINEXPR_EQUAL:
1117         case BINEXPR_NOTEQUAL:
1118         case BINEXPR_LESS:
1119         case BINEXPR_LESSEQUAL:
1120         case BINEXPR_GREATER:
1121         case BINEXPR_GREATEREQUAL: {
1122                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1123                 ir_node *left  = expression_to_firm(expression->left);
1124                 ir_node *right = expression_to_firm(expression->right);
1125                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1126                 long     pnc   = get_pnc(type);
1127                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1128                 return proj;
1129         }
1130         case BINEXPR_ASSIGN: {
1131                 ir_node *right = expression_to_firm(expression->right);
1132                 set_value_for_expression(expression->left, right);
1133                 return right;
1134         }
1135         case BINEXPR_ADD:
1136                 return create_add(expression);
1137         case BINEXPR_SUB:
1138                 return create_sub(expression);
1139         case BINEXPR_MUL:
1140                 return create_arithmetic_binop(expression, new_d_Mul);
1141         case BINEXPR_BITWISE_AND:
1142                 return create_arithmetic_binop(expression, new_d_And);
1143         case BINEXPR_BITWISE_OR:
1144                 return create_arithmetic_binop(expression, new_d_Or);
1145         case BINEXPR_BITWISE_XOR:
1146                 return create_arithmetic_binop(expression, new_d_Eor);
1147         case BINEXPR_SHIFTLEFT:
1148         case BINEXPR_SHIFTRIGHT:
1149                 return create_shift(expression);
1150         case BINEXPR_DIV:
1151         case BINEXPR_MOD:
1152                 return create_divmod(expression);
1153         case BINEXPR_LOGICAL_AND:
1154         case BINEXPR_LOGICAL_OR:
1155                 return create_lazy_op(expression);
1156         case BINEXPR_COMMA:
1157                 expression_to_firm(expression->left);
1158                 return expression_to_firm(expression->right);
1159         case BINEXPR_ADD_ASSIGN:
1160                 return create_arithmetic_assign_binop(expression, new_d_Add);
1161         case BINEXPR_SUB_ASSIGN:
1162                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1163         case BINEXPR_MUL_ASSIGN:
1164                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1165         case BINEXPR_BITWISE_AND_ASSIGN:
1166                 return create_arithmetic_assign_binop(expression, new_d_And);
1167         case BINEXPR_BITWISE_OR_ASSIGN:
1168                 return create_arithmetic_assign_binop(expression, new_d_Or);
1169         case BINEXPR_BITWISE_XOR_ASSIGN:
1170                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1171         case BINEXPR_SHIFTLEFT_ASSIGN:
1172                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1173         case BINEXPR_SHIFTRIGHT_ASSIGN:
1174                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1175         default:
1176                 panic("TODO binexpr type");
1177         }
1178 }
1179
1180 static ir_node *array_access_addr(const array_access_expression_t *expression)
1181 {
1182         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1183
1184         ir_node *base_addr = expression_to_firm(expression->array_ref);
1185         ir_node *offset    = expression_to_firm(expression->index);
1186         offset             = create_conv(dbgi, offset, mode_Iu);
1187
1188         unsigned elem_size       = get_type_size(expression->expression.datatype);
1189         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1190         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1191                                              mode_Iu);
1192         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1193
1194         return result;
1195 }
1196
1197 static ir_node *array_access_to_firm(
1198                 const array_access_expression_t *expression)
1199 {
1200         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1201         ir_node  *addr = array_access_addr(expression);
1202         type_t   *type = expression->expression.datatype;
1203
1204         return load_from_expression_addr(type, addr, dbgi);
1205 }
1206
1207 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1208 {
1209         type_t *type = expression->type;
1210         if(type == NULL) {
1211                 type = expression->size_expression->datatype;
1212                 assert(type != NULL);
1213         }
1214
1215         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1216         unsigned  size      = get_type_size(type);
1217         ir_node  *size_node = new_Const_long(mode, size);
1218
1219         return size_node;
1220 }
1221
1222 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1223 {
1224         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1225
1226         ir_node *condition  = expression_to_modeb(expression->condition);
1227         ir_node *cond       = new_d_Cond(dbgi, condition);
1228         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1229         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1230
1231         /* create the true block */
1232         ir_node *true_block = new_immBlock();
1233         add_immBlock_pred(true_block, true_proj);
1234         mature_immBlock(true_block);
1235
1236         ir_node *true_val = expression_to_firm(expression->true_expression);
1237         ir_node *true_jmp = new_Jmp();
1238
1239         /* create the false block */
1240         ir_node *false_block = new_immBlock();
1241         add_immBlock_pred(false_block, false_proj);
1242         mature_immBlock(false_block);
1243
1244         ir_node *false_val = expression_to_firm(expression->false_expression);
1245         ir_node *false_jmp = new_Jmp();
1246
1247         /* create the common block */
1248         ir_node *common_block = new_immBlock();
1249         add_immBlock_pred(common_block, true_jmp);
1250         add_immBlock_pred(common_block, false_jmp);
1251         mature_immBlock(common_block);
1252
1253         ir_node *in[2] = { true_val, false_val };
1254         ir_mode *mode  = get_irn_mode(true_val);
1255         assert(get_irn_mode(false_val) == mode);
1256         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1257
1258         return val;
1259 }
1260
1261 static ir_node *expression_to_addr(const expression_t *expression)
1262 {
1263         switch(expression->type) {
1264         case EXPR_REFERENCE:
1265                 return reference_addr((const reference_expression_t*) expression);
1266         case EXPR_ARRAY_ACCESS:
1267                 return array_access_addr((const array_access_expression_t*) expression);
1268         default:
1269                 break;
1270         }
1271         panic("trying to get address of non-lvalue");
1272 }
1273
1274 static ir_node *_expression_to_firm(const expression_t *expression)
1275 {
1276         switch(expression->type) {
1277         case EXPR_CONST:
1278                 return const_to_firm((const const_t*) expression);
1279         case EXPR_STRING_LITERAL:
1280                 return string_literal_to_firm((const string_literal_t*) expression);
1281         case EXPR_REFERENCE:
1282                 return reference_expression_to_firm(
1283                                 (const reference_expression_t*) expression);
1284         case EXPR_CALL:
1285                 return call_expression_to_firm((const call_expression_t*) expression);
1286         case EXPR_UNARY:
1287                 return unary_expression_to_firm((const unary_expression_t*) expression);
1288         case EXPR_BINARY:
1289                 return binary_expression_to_firm(
1290                                 (const binary_expression_t*) expression);
1291         case EXPR_ARRAY_ACCESS:
1292                 return array_access_to_firm(
1293                                 (const array_access_expression_t*) expression);
1294         case EXPR_SIZEOF:
1295                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1296         case EXPR_CONDITIONAL:
1297                 return conditional_to_firm((const conditional_expression_t*)expression);
1298         default:
1299                 break;
1300         }
1301         panic("unsupported expression found");
1302 }
1303
1304 static ir_node *expression_to_firm(const expression_t *expression)
1305 {
1306         ir_node *res  = _expression_to_firm(expression);
1307
1308         if(expression->datatype == type_void)
1309                 return NULL;
1310
1311         ir_mode *mode = get_ir_mode(expression->datatype);
1312         res           = create_conv(NULL, res, mode);
1313         return res;
1314 }
1315
1316 static ir_node *expression_to_modeb(const expression_t *expression)
1317 {
1318         ir_node *res = _expression_to_firm(expression);
1319         res          = create_conv(NULL, res, mode_b);
1320
1321         return res;
1322 }
1323
1324 static void statement_to_firm(statement_t *statement);
1325
1326 static void return_statement_to_firm(return_statement_t *statement)
1327 {
1328         if(get_cur_block() == NULL)
1329                 return;
1330
1331         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1332         ir_node  *ret;
1333
1334         if(statement->return_value != NULL) {
1335                 ir_node *retval = expression_to_firm(statement->return_value);
1336                 ir_node *in[1];
1337
1338                 in[0] = retval;
1339                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1340         } else {
1341                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1342         }
1343         ir_node *end_block = get_irg_end_block(current_ir_graph);
1344         add_immBlock_pred(end_block, ret);
1345
1346         set_cur_block(NULL);
1347 }
1348
1349 static void compound_statement_to_firm(compound_statement_t *compound)
1350 {
1351         statement_t *statement = compound->statements;
1352         for( ; statement != NULL; statement = statement->next) {
1353                 //context2firm(&statement->context);
1354                 statement_to_firm(statement);
1355         }
1356 }
1357
1358 static void expression_statement_to_firm(expression_statement_t *statement)
1359 {
1360         if(get_cur_block() == NULL)
1361                 return;
1362
1363         expression_to_firm(statement->expression);
1364 }
1365
1366 static void if_statement_to_firm(if_statement_t *statement)
1367 {
1368         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
1369         ir_node  *condition = expression_to_modeb(statement->condition);
1370
1371         /* make sure we have a mode_b condition */
1372         ir_node *cond       = new_d_Cond(dbgi, condition);
1373         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1374         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1375
1376         ir_node *fallthrough_block = new_immBlock();
1377
1378         /* the true (blocks) */
1379         ir_node *true_block = new_immBlock();
1380         add_immBlock_pred(true_block, true_proj);
1381         mature_immBlock(true_block);
1382
1383         statement_to_firm(statement->true_statement);
1384         if(get_cur_block() != NULL) {
1385                 ir_node *jmp = new_Jmp();
1386                 add_immBlock_pred(fallthrough_block, jmp);
1387         }
1388
1389         /* the false (blocks) */
1390         if(statement->false_statement != NULL) {
1391                 ir_node *false_block = new_immBlock();
1392                 add_immBlock_pred(false_block, false_proj);
1393                 mature_immBlock(false_block);
1394
1395                 statement_to_firm(statement->false_statement);
1396                 if(get_cur_block() != NULL) {
1397                         ir_node *jmp = new_Jmp();
1398                         add_immBlock_pred(fallthrough_block, jmp);
1399                 }
1400         } else {
1401                 add_immBlock_pred(fallthrough_block, false_proj);
1402         }
1403         mature_immBlock(fallthrough_block);
1404
1405         set_cur_block(fallthrough_block);
1406 }
1407
1408 static void while_statement_to_firm(while_statement_t *statement)
1409 {
1410         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1411
1412         ir_node *jmp = NULL;
1413         if(get_cur_block() != NULL) {
1414                 jmp = new_Jmp();
1415         }
1416
1417         /* create the header block */
1418         ir_node *header_block = new_immBlock();
1419         if(jmp != NULL) {
1420                 add_immBlock_pred(header_block, jmp);
1421         }
1422
1423         /* create the condition */
1424         ir_node *condition  = expression_to_modeb(statement->condition);
1425         ir_node *cond       = new_d_Cond(dbgi, condition);
1426         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1427         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1428
1429         /* the false block */
1430         ir_node *false_block = new_immBlock();
1431         add_immBlock_pred(false_block, false_proj);
1432
1433         /* the loop body */
1434         ir_node *body_block = new_immBlock();
1435         add_immBlock_pred(body_block, true_proj);
1436         mature_immBlock(body_block);
1437
1438         ir_node *old_continue_label = continue_label;
1439         ir_node *old_break_label    = break_label;
1440         continue_label              = header_block;
1441         break_label                 = false_block;
1442
1443         statement_to_firm(statement->body);
1444
1445         assert(continue_label == header_block);
1446         assert(break_label    == false_block);
1447         continue_label = old_continue_label;
1448         break_label    = old_break_label;
1449
1450         if(get_cur_block() != NULL) {
1451                 ir_node *jmp = new_Jmp();
1452                 add_immBlock_pred(header_block, jmp);
1453         }
1454
1455         mature_immBlock(header_block);
1456         mature_immBlock(false_block);
1457
1458         set_cur_block(false_block);
1459 }
1460
1461 static void do_while_statement_to_firm(do_while_statement_t *statement)
1462 {
1463         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1464
1465         ir_node *jmp = NULL;
1466         if(get_cur_block() != NULL) {
1467                 jmp = new_Jmp();
1468         }
1469
1470         /* create the header block */
1471         ir_node *header_block = new_immBlock();
1472
1473         /* the false block */
1474         ir_node *false_block = new_immBlock();
1475
1476         /* the loop body */
1477         ir_node *body_block = new_immBlock();
1478         if(jmp != NULL) {
1479                 add_immBlock_pred(body_block, jmp);
1480         }
1481
1482         ir_node *old_continue_label = continue_label;
1483         ir_node *old_break_label    = break_label;
1484         continue_label              = header_block;
1485         break_label                 = false_block;
1486
1487         statement_to_firm(statement->body);
1488
1489         assert(continue_label == header_block);
1490         assert(break_label    == false_block);
1491         continue_label = old_continue_label;
1492         break_label    = old_break_label;
1493
1494         if(get_cur_block() == NULL) {
1495                 mature_immBlock(header_block);
1496                 mature_immBlock(body_block);
1497                 return;
1498         }
1499
1500         ir_node *body_jmp = new_Jmp();
1501         add_immBlock_pred(header_block, body_jmp);
1502         mature_immBlock(header_block);
1503
1504         /* create the condition */
1505         ir_node *condition  = expression_to_modeb(statement->condition);
1506         ir_node *cond       = new_d_Cond(dbgi, condition);
1507         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1508         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1509
1510         add_immBlock_pred(body_block, true_proj);
1511         mature_immBlock(body_block);
1512
1513         add_immBlock_pred(false_block, false_proj);
1514         mature_immBlock(false_block);
1515
1516         set_cur_block(false_block);
1517 }
1518
1519 static void for_statement_to_firm(for_statement_t *statement)
1520 {
1521         dbg_info *const dbgi = get_dbg_info(&statement->statement.source_position);
1522
1523         ir_node *jmp = NULL;
1524         if (get_cur_block() != NULL) {
1525                 if(statement->initialisation != NULL) {
1526                         expression_to_firm(statement->initialisation);
1527                 }
1528                 jmp = new_Jmp();
1529         }
1530
1531         /* create the step block */
1532         ir_node *const step_block = new_immBlock();
1533         if (statement->step != NULL) {
1534                 expression_to_firm(statement->step);
1535         }
1536         ir_node *const step_jmp   = new_Jmp();
1537
1538         /* create the header block */
1539         ir_node *const header_block = new_immBlock();
1540         if (jmp != NULL) {
1541                 add_immBlock_pred(header_block, jmp);
1542         }
1543         add_immBlock_pred(header_block, step_jmp);
1544
1545         /* create the condition */
1546         ir_node *true_proj;
1547         ir_node *false_proj;
1548         if (statement->condition != NULL) {
1549                 ir_node *const condition  = expression_to_modeb(statement->condition);
1550                 ir_node *const cond       = new_d_Cond(dbgi, condition);
1551                 true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1552                 false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1553         } else {
1554                 keep_alive(header_block);
1555                 true_proj  = new_Jmp();
1556                 false_proj = NULL;
1557         }
1558
1559         /* the false block */
1560         ir_node *const false_block = new_immBlock();
1561         if (false_proj != NULL) {
1562                 add_immBlock_pred(false_block, false_proj);
1563         }
1564
1565         /* the loop body */
1566         ir_node *const body_block = new_immBlock();
1567         add_immBlock_pred(body_block, true_proj);
1568         mature_immBlock(body_block);
1569
1570         ir_node *const old_continue_label = continue_label;
1571         ir_node *const old_break_label    = break_label;
1572         continue_label = step_block;
1573         break_label    = false_block;
1574
1575         statement_to_firm(statement->body);
1576
1577         assert(continue_label == step_block);
1578         assert(break_label    == false_block);
1579         continue_label = old_continue_label;
1580         break_label    = old_break_label;
1581
1582         if (get_cur_block() != NULL) {
1583                 ir_node *const jmp = new_Jmp();
1584                 add_immBlock_pred(step_block, jmp);
1585         }
1586
1587         mature_immBlock(step_block);
1588         mature_immBlock(header_block);
1589         mature_immBlock(false_block);
1590
1591         set_cur_block(false_block);
1592 }
1593
1594 static void create_declaration_entity(declaration_t *declaration,
1595                                       declaration_type_t declaration_type,
1596                                       ir_type *parent_type)
1597 {
1598         ident     *id     = new_id_from_str(declaration->symbol->string);
1599         ir_type   *irtype = get_ir_type(declaration->type);
1600         ir_entity *entity = new_entity(parent_type, id, irtype);
1601         set_entity_ld_ident(entity, id);
1602
1603         declaration->declaration_type = declaration_type;
1604         declaration->v.entity         = entity;
1605         set_entity_variability(entity, variability_uninitialized);
1606         /* TODO: visibility? */
1607 }
1608
1609 static void create_initializer(declaration_t *declaration)
1610 {
1611         initializer_t *initializer = declaration->init.initializer;
1612         if(initializer == NULL)
1613                 return;
1614
1615         if(initializer->type == INITIALIZER_VALUE) {
1616                 assert(initializer->designator == NULL);
1617                 assert(initializer->next == NULL);
1618                 ir_node *init_node = expression_to_firm(initializer->v.value);
1619
1620                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1621                         set_value(declaration->v.value_number, init_node);
1622                 } else {
1623                         ir_entity *entity = declaration->v.entity;
1624
1625                         set_entity_variability(entity, variability_initialized);
1626                         set_atomic_ent_value(entity, init_node);
1627                 }
1628         } else {
1629                 assert(initializer->type == INITIALIZER_LIST);
1630                 panic("list initializer not supported yet");
1631         }
1632 }
1633
1634 static void create_local_variable(declaration_t *declaration)
1635 {
1636         bool needs_entity = declaration->address_taken;
1637
1638         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1639
1640         if(needs_entity) {
1641                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1642                 create_declaration_entity(declaration,
1643                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1644                                           frame_type);
1645         } else {
1646                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1647                 declaration->v.value_number   = next_value_number_function;
1648                 ++next_value_number_function;
1649         }
1650
1651         create_initializer(declaration);
1652 }
1653
1654 static void declaration_statement_to_firm(declaration_statement_t *statement)
1655 {
1656         declaration_t *declaration = statement->declarations_begin;
1657         declaration_t *end         = statement->declarations_end->next;
1658         for( ; declaration != end; declaration = declaration->next) {
1659                 type_t *type = declaration->type;
1660
1661                 switch(declaration->storage_class) {
1662                 case STORAGE_CLASS_TYPEDEF:
1663                         continue;
1664                 case STORAGE_CLASS_STATIC:
1665                         panic("static local vars not implemented yet");
1666                 case STORAGE_CLASS_ENUM_ENTRY:
1667                         panic("enum entry declaration in local block found");
1668                 case STORAGE_CLASS_EXTERN:
1669                         panic("extern declaration in local block found");
1670                 case STORAGE_CLASS_NONE:
1671                 case STORAGE_CLASS_AUTO:
1672                 case STORAGE_CLASS_REGISTER:
1673                         if(type->type == TYPE_FUNCTION) {
1674                                 panic("nested functions not supported yet");
1675                         } else {
1676                                 create_local_variable(declaration);
1677                         }
1678                         continue;
1679                 }
1680                 panic("invalid storage class found");
1681         }
1682 }
1683
1684 static void create_jump_statement(const statement_t *statement,
1685                                   ir_node *target_block)
1686 {
1687         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1688         ir_node  *jump = new_d_Jmp(dbgi);
1689         add_immBlock_pred(target_block, jump);
1690
1691         set_cur_block(NULL);
1692 }
1693
1694 static void switch_statement_to_firm(const switch_statement_t *statement)
1695 {
1696         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1697
1698         ir_node *expression  = expression_to_firm(statement->expression);
1699         ir_node *cond        = new_d_Cond(dbgi, expression);
1700         ir_node *break_block = new_immBlock();
1701
1702         set_cur_block(NULL);
1703
1704         ir_node *old_switch_cond = current_switch_cond;
1705         ir_node *old_break_label = break_label;
1706         current_switch_cond      = cond;
1707         break_label              = break_block;
1708
1709         statement_to_firm(statement->body);
1710
1711         if(get_cur_block() != NULL) {
1712                 ir_node *jmp = new_Jmp();
1713                 add_immBlock_pred(break_block, jmp);
1714         }
1715
1716         assert(current_switch_cond == cond);
1717         assert(break_label         == break_block);
1718         current_switch_cond = old_switch_cond;
1719         break_label         = old_break_label;
1720
1721         mature_immBlock(break_block);
1722         set_cur_block(break_block);
1723 }
1724
1725 static long fold_constant(const expression_t *expression)
1726 {
1727         ir_graph *old_current_ir_graph = current_ir_graph;
1728         current_ir_graph = get_const_code_irg();
1729
1730         ir_node *cnst = expression_to_firm(expression);
1731         if(!is_Const(cnst)) {
1732                 panic("couldn't fold constantl");
1733         }
1734         tarval *tv = get_Const_tarval(cnst);
1735         if(!tarval_is_long(tv)) {
1736                 panic("folded constant not an integer");
1737         }
1738
1739         long res = get_tarval_long(tv);
1740
1741         current_ir_graph = old_current_ir_graph;
1742         return res;
1743 }
1744
1745 static void case_label_to_firm(const case_label_statement_t *statement)
1746 {
1747         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1748
1749         /* let's create a node and hope firm constant folding creates a Const
1750          * node... */
1751         ir_node *proj;
1752         set_cur_block(get_nodes_block(current_switch_cond));
1753         if(statement->expression) {
1754                 long pn = fold_constant(statement->expression);
1755                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1756                         /* oops someone detected our cheating... */
1757                         panic("magic default pn used");
1758                 }
1759                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1760         } else {
1761                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1762                                          MAGIC_DEFAULT_PN_NUMBER);
1763         }
1764
1765         ir_node *block = new_immBlock();
1766         add_immBlock_pred(block, proj);
1767         mature_immBlock(block);
1768 }
1769
1770 static ir_node *get_label_block(declaration_t *label)
1771 {
1772         assert(label->namespace == NAMESPACE_LABEL);
1773
1774         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1775                 return label->v.block;
1776         }
1777         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1778
1779         ir_node *old_cur_block = get_cur_block();
1780         ir_node *block         = new_immBlock();
1781         set_cur_block(old_cur_block);
1782
1783         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1784         label->v.block          = block;
1785
1786         ARR_APP1(imature_blocks, block);
1787
1788         return block;
1789 }
1790
1791 static void label_to_firm(const label_statement_t *statement)
1792 {
1793         ir_node *block = get_label_block(statement->label);
1794
1795         if(get_cur_block() != NULL) {
1796                 ir_node *jmp = new_Jmp();
1797                 add_immBlock_pred(block, jmp);
1798         }
1799
1800         set_cur_block(block);
1801         keep_alive(block);
1802
1803         statement_to_firm(statement->label_statement);
1804 }
1805
1806 static void goto_to_firm(const goto_statement_t *statement)
1807 {
1808         if(get_cur_block() == NULL)
1809                 return;
1810
1811         ir_node *block = get_label_block(statement->label);
1812         ir_node *jmp   = new_Jmp();
1813         add_immBlock_pred(block, jmp);
1814
1815         set_cur_block(NULL);
1816 }
1817
1818 static void statement_to_firm(statement_t *statement)
1819 {
1820         switch(statement->type) {
1821         case STATEMENT_COMPOUND:
1822                 compound_statement_to_firm((compound_statement_t*) statement);
1823                 return;
1824         case STATEMENT_RETURN:
1825                 return_statement_to_firm((return_statement_t*) statement);
1826                 return;
1827         case STATEMENT_EXPRESSION:
1828                 expression_statement_to_firm((expression_statement_t*) statement);
1829                 return;
1830         case STATEMENT_IF:
1831                 if_statement_to_firm((if_statement_t*) statement);
1832                 return;
1833         case STATEMENT_WHILE:
1834                 while_statement_to_firm((while_statement_t*) statement);
1835                 return;
1836         case STATEMENT_DO_WHILE:
1837                 do_while_statement_to_firm((do_while_statement_t*) statement);
1838                 return;
1839         case STATEMENT_DECLARATION:
1840                 declaration_statement_to_firm((declaration_statement_t*) statement);
1841                 return;
1842         case STATEMENT_BREAK:
1843                 create_jump_statement(statement, break_label);
1844                 return;
1845         case STATEMENT_CONTINUE:
1846                 create_jump_statement(statement, continue_label);
1847                 return;
1848         case STATEMENT_SWITCH:
1849                 switch_statement_to_firm((switch_statement_t*) statement);
1850                 return;
1851         case STATEMENT_CASE_LABEL:
1852                 case_label_to_firm((case_label_statement_t*) statement);
1853                 return;
1854         case STATEMENT_FOR:
1855                 for_statement_to_firm((for_statement_t*) statement);
1856                 return;
1857         case STATEMENT_LABEL:
1858                 label_to_firm((label_statement_t*) statement);
1859                 return;
1860         case STATEMENT_GOTO:
1861                 goto_to_firm((goto_statement_t*) statement);
1862                 return;
1863         default:
1864                 break;
1865         }
1866         panic("Statement not implemented\n");
1867 }
1868
1869 static int get_function_n_local_vars(declaration_t *declaration)
1870 {
1871         (void) declaration;
1872         /* TODO */
1873         return 30;
1874 }
1875
1876 static void initialize_function_parameters(declaration_t *declaration)
1877 {
1878         ir_graph *irg         = current_ir_graph;
1879         ir_node  *args        = get_irg_args(irg);
1880         ir_node  *start_block = get_irg_start_block(irg);
1881
1882         int            n         = 0;
1883         declaration_t *parameter = declaration->context.declarations;
1884         for( ; parameter != NULL; parameter = parameter->next) {
1885                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
1886
1887                 if(parameter->address_taken) {
1888                         panic("address take from parameter not implemented yet");
1889                 }
1890
1891                 ir_mode *mode = get_ir_mode(parameter->type);
1892                 long     pn   = n;
1893                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
1894                 ++n;
1895
1896                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1897                 parameter->v.value_number   = next_value_number_function;
1898                 ++next_value_number_function;
1899
1900                 set_value(parameter->v.value_number, proj);
1901         }
1902 }
1903
1904 static void create_function(declaration_t *declaration)
1905 {
1906         ir_entity *entity = get_function_entity(declaration);
1907
1908         if(declaration->init.statement == NULL)
1909                 return;
1910
1911         assert(imature_blocks == NULL);
1912         imature_blocks = NEW_ARR_F(ir_node*, 0);
1913
1914         int       n_local_vars = get_function_n_local_vars(declaration);
1915         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
1916         ir_node  *first_block  = get_cur_block();
1917
1918         next_value_number_function = 0;
1919         initialize_function_parameters(declaration);
1920
1921         statement_to_firm(declaration->init.statement);
1922
1923         ir_node *end_block = get_irg_end_block(irg);
1924
1925         /* do we have a return statement yet? */
1926         if(get_cur_block() != NULL) {
1927                 assert(declaration->type->type == TYPE_FUNCTION);
1928                 const function_type_t* const func_type
1929                         = (const function_type_t*) declaration->type;
1930                 ir_node *ret;
1931                 if (func_type->result_type == type_void) {
1932                         ret = new_Return(get_store(), 0, NULL);
1933                 } else {
1934                         ir_mode *const mode = get_ir_mode(func_type->result_type);
1935                         ir_node *      in[1];
1936                         // §5.1.2.2.3 main implicitly returns 0
1937                         if (strcmp(declaration->symbol->string, "main") == 0) {
1938                                 in[0] = new_Const(mode, get_mode_null(mode));
1939                         } else {
1940                                 in[0] = new_Unknown(mode);
1941                         }
1942                         ret = new_Return(get_store(), 1, in);
1943                 }
1944                 add_immBlock_pred(end_block, ret);
1945         }
1946
1947         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
1948                 mature_immBlock(imature_blocks[i]);
1949         }
1950         DEL_ARR_F(imature_blocks);
1951         imature_blocks = NULL;
1952
1953         mature_immBlock(first_block);
1954         mature_immBlock(end_block);
1955
1956         irg_finalize_cons(irg);
1957
1958         /* finalize the frame type */
1959         ir_type *frame_type = get_irg_frame_type(irg);
1960         int      n          = get_compound_n_members(frame_type);
1961         int      align_all  = 4;
1962         int      offset     = 0;
1963         for(int i = 0; i < n; ++i) {
1964                 ir_entity *entity      = get_compound_member(frame_type, i);
1965                 ir_type   *entity_type = get_entity_type(entity);
1966
1967                 int align = get_type_alignment_bytes(entity_type);
1968                 if(align > align_all)
1969                         align_all = align;
1970                 int misalign = 0;
1971                 if(align > 0) {
1972                         misalign  = offset % align;
1973                         offset   += misalign;
1974                 }
1975
1976                 set_entity_offset(entity, offset);
1977                 offset += get_type_size_bytes(entity_type);
1978         }
1979         set_type_size_bytes(frame_type, offset);
1980         set_type_alignment_bytes(frame_type, align_all);
1981         set_type_state(frame_type, layout_fixed);
1982
1983         irg_vrfy(irg);
1984 }
1985
1986 static void create_global_variable(declaration_t *declaration)
1987 {
1988         ir_type   *global_type = get_glob_type();
1989         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
1990                                   global_type);
1991
1992         ir_entity *entity = declaration->v.entity;
1993         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
1994                 set_entity_visibility(entity, visibility_local);
1995         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
1996                 set_entity_visibility(entity, visibility_external_allocated);
1997         } else {
1998                 set_entity_visibility(entity, visibility_external_visible);
1999         }
2000         current_ir_graph = get_const_code_irg();
2001         create_initializer(declaration);
2002 }
2003
2004 static void context_to_firm(context_t *context)
2005 {
2006         declaration_t *declaration = context->declarations;
2007         for( ; declaration != NULL; declaration = declaration->next) {
2008                 if(declaration->namespace != NAMESPACE_NORMAL)
2009                         continue;
2010                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2011                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2012                         continue;
2013                 if(declaration->symbol == NULL)
2014                         continue;
2015
2016                 type_t *type = declaration->type;
2017                 if(type->type == TYPE_FUNCTION) {
2018                         create_function(declaration);
2019                 } else {
2020                         create_global_variable(declaration);
2021                 }
2022         }
2023 }
2024
2025 void translation_unit_to_firm(translation_unit_t *unit)
2026 {
2027         /* remove me later TODO FIXME */
2028         (void) get_type_size;
2029
2030         /* just to be sure */
2031         continue_label      = NULL;
2032         break_label         = NULL;
2033         current_switch_cond = NULL;
2034
2035         context_to_firm(& unit->context);
2036 }