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