nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "token_t.h"
  16 #include "type_t.h"
  17 #include "ast_t.h"
  18
  19 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  20
  21 static ir_type *ir_type_const_char;
  22 static ir_type *ir_type_void;
  23 static ir_type *ir_type_int;
  24 static ir_type *ir_type_void_ptr;
  25
  26 static type_t *type_const_char;
  27 static type_t *type_void;
  28 static type_t *type_int;
  29
  30 static int next_value_number_function;
  31 static ir_node *continue_label;
  32 static ir_node *break_label;
  33 static ir_node *current_switch_cond;
  34
  35 typedef enum declaration_type_t {
  36         DECLARATION_TYPE_UNKNOWN,
  37         DECLARATION_TYPE_FUNCTION,
  38         DECLARATION_TYPE_GLOBAL_VARIABLE,
  39         DECLARATION_TYPE_LOCAL_VARIABLE,
  40         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  41         DECLARATION_TYPE_COMPOUND_MEMBER
  42 } declaration_type_t;
  43
  44 static ir_type *get_ir_type(type_t *type);
  45
  46 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  47 {
  48         (void) pos;
  49 #if 0
  50         const declaration_t *declaration = & value_numbers[pos]->declaration;
  51
  52         print_warning_prefix(declaration->source_position);
  53         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  54                         declaration->symbol->string);
  55 #endif
  56         fprintf(stderr, "Some variable might be used uninitialized\n");
  57         return new_r_Unknown(irg, mode);
  58 }
  59
  60 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  61 {
  62         const source_position_t *pos = (const source_position_t*) dbg;
  63         if(pos == NULL)
  64                 return 0;
  65         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  66                                    pos->linenr);
  67 }
  68
  69 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  70 {
  71         const source_position_t *pos = (const source_position_t*) dbg;
  72         if(pos == NULL)
  73                 return NULL;
  74         if(line != NULL)
  75                 *line = pos->linenr;
  76         return pos->input_name;
  77 }
  78
  79 void init_ast2firm(void)
  80 {
  81         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  82         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  83         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  84
  85         ir_type_int        = get_ir_type(type_int);
  86         ir_type_const_char = get_ir_type(type_const_char);
  87         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  88                                                        type in firm */
  89         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  90                                               ir_type_void, mode_P_data);
  91
  92         type_void->firm_type = ir_type_void;
  93 }
  94
  95 void exit_ast2firm(void)
  96 {
  97 }
  98
  99 static unsigned unique_id = 0;
 100
 101 static ident *unique_ident(const char *tag)
 102 {
 103         char buf[256];
 104
 105         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 106         unique_id++;
 107         return new_id_from_str(buf);
 108 }
 109
 110 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 111 {
 112         switch(atomic_type->atype) {
 113         case ATOMIC_TYPE_SCHAR:
 114         case ATOMIC_TYPE_CHAR:
 115                 return mode_Bs;
 116         case ATOMIC_TYPE_UCHAR:
 117                 return mode_Bu;
 118         case ATOMIC_TYPE_SHORT:
 119                 return mode_Hs;
 120         case ATOMIC_TYPE_USHORT:
 121                 return mode_Hu;
 122         case ATOMIC_TYPE_LONG:
 123         case ATOMIC_TYPE_INT:
 124                 return mode_Is;
 125         case ATOMIC_TYPE_ULONG:
 126         case ATOMIC_TYPE_UINT:
 127                 return mode_Iu;
 128         case ATOMIC_TYPE_LONGLONG:
 129                 return mode_Ls;
 130         case ATOMIC_TYPE_ULONGLONG:
 131                 return mode_Lu;
 132         case ATOMIC_TYPE_FLOAT:
 133                 return mode_F;
 134         case ATOMIC_TYPE_DOUBLE:
 135                 return mode_D;
 136         case ATOMIC_TYPE_LONG_DOUBLE:
 137                 return mode_E;
 138         case ATOMIC_TYPE_BOOL:
 139                 return mode_b;
 140 #ifdef PROVIDE_COMPLEX
 141         case ATOMIC_TYPE_FLOAT_COMPLEX:
 142         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 143         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 144                 panic("complex lowering not implemented yet");
 145                 break;
 146         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 147         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 148         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 149                 panic("imaginary lowering not implemented yet");
 150                 break;
 151 #endif
 152         case ATOMIC_TYPE_VOID:
 153                 /* firm has no real void... */
 154                 return mode_Is;
 155         case ATOMIC_TYPE_INVALID:
 156                 break;
 157         }
 158         panic("Encountered unknown atomic type");
 159 }
 160
 161
 162 static unsigned get_type_size(type_t *type);
 163
 164 static unsigned get_atomic_type_size(const atomic_type_t *type)
 165 {
 166         switch(type->atype) {
 167         case ATOMIC_TYPE_CHAR:
 168         case ATOMIC_TYPE_SCHAR:
 169         case ATOMIC_TYPE_UCHAR:
 170                 return 1;
 171
 172         case ATOMIC_TYPE_SHORT:
 173         case ATOMIC_TYPE_USHORT:
 174                 return 2;
 175
 176         case ATOMIC_TYPE_BOOL:
 177         case ATOMIC_TYPE_INT:
 178         case ATOMIC_TYPE_UINT:
 179         case ATOMIC_TYPE_LONG:
 180         case ATOMIC_TYPE_ULONG:
 181         case ATOMIC_TYPE_FLOAT:
 182                 return 4;
 183
 184         case ATOMIC_TYPE_LONGLONG:
 185         case ATOMIC_TYPE_ULONGLONG:
 186         case ATOMIC_TYPE_DOUBLE:
 187                 return 8;
 188
 189         case ATOMIC_TYPE_LONG_DOUBLE:
 190                 return 12;
 191
 192         case ATOMIC_TYPE_VOID:
 193                 return 1;
 194
 195         case ATOMIC_TYPE_INVALID:
 196                 break;
 197         }
 198         panic("Trying to determine size of invalid atomic type");
 199 }
 200
 201 static unsigned get_compound_type_size(compound_type_t *type)
 202 {
 203         ir_type *irtype = get_ir_type(&type->type);
 204         return get_type_size_bytes(irtype);
 205 }
 206
 207 static unsigned get_array_type_size(array_type_t *type)
 208 {
 209         ir_type *irtype = get_ir_type(&type->type);
 210         return get_type_size_bytes(irtype);
 211 }
 212
 213 static unsigned get_type_size(type_t *type)
 214 {
 215         type = skip_typeref(type);
 216
 217         switch(type->type) {
 218         case TYPE_ATOMIC:
 219                 return get_atomic_type_size((const atomic_type_t*) type);
 220         case TYPE_ENUM:
 221                 return get_mode_size_bytes(mode_Is);
 222         case TYPE_COMPOUND_UNION:
 223         case TYPE_COMPOUND_STRUCT:
 224                 return get_compound_type_size((compound_type_t*) type);
 225         case TYPE_FUNCTION:
 226                 /* just a pointer to the function */
 227                 return get_mode_size_bytes(mode_P_code);
 228         case TYPE_POINTER:
 229                 return get_mode_size_bytes(mode_P_data);
 230         case TYPE_ARRAY:
 231                 return get_array_type_size((array_type_t*) type);
 232         case TYPE_BUILTIN:
 233         case TYPE_TYPEDEF:
 234         case TYPE_TYPEOF:
 235         case TYPE_INVALID:
 236                 break;
 237         }
 238         panic("Trying to determine size of invalid type");
 239 }
 240
 241 static unsigned count_parameters(const function_type_t *function_type)
 242 {
 243         unsigned count = 0;
 244
 245         function_parameter_t *parameter = function_type->parameters;
 246         for ( ; parameter != NULL; parameter = parameter->next) {
 247                 ++count;
 248         }
 249
 250         return count;
 251 }
 252
 253
 254
 255
 256 static ir_type *create_atomic_type(const atomic_type_t *type)
 257 {
 258         ir_mode *mode   = get_atomic_mode(type);
 259         ident   *id     = get_mode_ident(mode);
 260         ir_type *irtype = new_type_primitive(id, mode);
 261
 262         return irtype;
 263 }
 264
 265 static ir_type *create_method_type(const function_type_t *function_type)
 266 {
 267         type_t  *result_type  = function_type->result_type;
 268
 269         ident   *id           = unique_ident("functiontype");
 270         int      n_parameters = count_parameters(function_type);
 271         int      n_results    = result_type == type_void ? 0 : 1;
 272         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 273
 274         if(result_type != type_void) {
 275                 ir_type *restype = get_ir_type(result_type);
 276                 set_method_res_type(irtype, 0, restype);
 277         }
 278
 279         function_parameter_t *parameter = function_type->parameters;
 280         int                   n         = 0;
 281         for( ; parameter != NULL; parameter = parameter->next) {
 282                 ir_type *p_irtype = get_ir_type(parameter->type);
 283                 set_method_param_type(irtype, n, p_irtype);
 284                 ++n;
 285         }
 286
 287         if(function_type->variadic || function_type->unspecified_parameters) {
 288                 set_method_variadicity(irtype, variadicity_variadic);
 289         }
 290
 291         return irtype;
 292 }
 293
 294 static ir_type *create_pointer_type(pointer_type_t *type)
 295 {
 296         type_t  *points_to = type->points_to;
 297         ir_type *ir_points_to;
 298         /* Avoid endless recursion if the points_to type contains this poiner type
 299          * again (might be a struct). We therefore first create a void* pointer
 300          * and then set the real points_to type
 301          */
 302         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 303                                             ir_type_void, mode_P_data);
 304         type->type.firm_type  = ir_type;
 305
 306         ir_points_to = get_ir_type(points_to);
 307         set_pointer_points_to_type(ir_type, ir_points_to);
 308
 309         return ir_type;
 310 }
 311
 312 static ir_type *create_array_type(array_type_t *type)
 313 {
 314         type_t  *element_type    = type->element_type;
 315         ir_type *ir_element_type = get_ir_type(element_type);
 316
 317         /* TODO... */
 318         int n_elements = 0;
 319         panic("TODO arraytpye size not implemented yet");
 320
 321         ir_type *ir_type = new_type_array(unique_ident("array"), 1, ir_element_type);
 322         set_array_bounds_int(ir_type, 0, 0, n_elements);
 323
 324         size_t elemsize = get_type_size_bytes(ir_element_type);
 325         int align = get_type_alignment_bytes(ir_element_type);
 326         if(elemsize % align > 0) {
 327                 elemsize += align - (elemsize % align);
 328         }
 329         set_type_size_bytes(ir_type, n_elements * elemsize);
 330         set_type_alignment_bytes(ir_type, align);
 331         set_type_state(ir_type, layout_fixed);
 332
 333         return ir_type;
 334 }
 335
 336 #define INVALID_TYPE ((ir_type_ptr)-1)
 337
 338 static ir_type *create_struct_type(compound_type_t *type)
 339 {
 340         symbol_t *symbol = type->declaration->symbol;
 341         ident    *id;
 342         if(symbol != NULL) {
 343                 id = unique_ident(symbol->string);
 344         } else {
 345                 id = unique_ident("__anonymous_struct");
 346         }
 347         ir_type *ir_type = new_type_struct(id);
 348
 349         type->type.firm_type = ir_type;
 350
 351         int align_all = 1;
 352         int offset    = 0;
 353         declaration_t *entry = type->declaration->context.declarations;
 354         for( ; entry != NULL; entry = entry->next) {
 355                 if(entry->namespace != NAMESPACE_NORMAL)
 356                         continue;
 357
 358                 ident       *ident         = new_id_from_str(entry->symbol->string);
 359                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 360
 361                 int entry_size      = get_type_size_bytes(entry_ir_type);
 362                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 363                 int misalign = offset % entry_alignment;
 364                 offset += misalign;
 365
 366                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 367                 set_entity_offset(entity, offset);
 368                 add_struct_member(ir_type, entity);
 369                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 370                 entry->v.entity         = entity;
 371
 372                 offset += entry_size;
 373                 if(entry_alignment > align_all) {
 374                         if(entry_alignment % align_all != 0) {
 375                                 panic("Uneven alignments not supported yet");
 376                         }
 377                         align_all = entry_alignment;
 378                 }
 379         }
 380
 381         int misalign = offset % align_all;
 382         offset += misalign;
 383         set_type_alignment_bytes(ir_type, align_all);
 384         set_type_size_bytes(ir_type, offset);
 385         set_type_state(ir_type, layout_fixed);
 386
 387         return ir_type;
 388 }
 389
 390 static ir_type *create_union_type(compound_type_t *type)
 391 {
 392         declaration_t *declaration = type->declaration;
 393         symbol_t      *symbol      = declaration->symbol;
 394         ident         *id;
 395         if(symbol != NULL) {
 396                 id = unique_ident(symbol->string);
 397         } else {
 398                 id = unique_ident("__anonymous_union");
 399         }
 400         ir_type  *ir_type = new_type_union(id);
 401
 402         type->type.firm_type = ir_type;
 403
 404         int align_all = 1;
 405         int size      = 0;
 406         declaration_t *entry = declaration->context.declarations;
 407         for( ; entry != NULL; entry = entry->next) {
 408                 if(entry->namespace != NAMESPACE_NORMAL)
 409                         continue;
 410
 411                 ident       *ident         = new_id_from_str(entry->symbol->string);
 412                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 413
 414                 int entry_size      = get_type_size_bytes(entry_ir_type);
 415                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 416
 417                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 418                 add_union_member(ir_type, entity);
 419                 set_entity_offset(entity, 0);
 420                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 421                 entry->v.entity         = entity;
 422
 423                 if(entry_size > size) {
 424                         size = entry_size;
 425                 }
 426                 if(entry_alignment > align_all) {
 427                         if(entry_alignment % align_all != 0) {
 428                                 panic("Uneven alignments not supported yet");
 429                         }
 430                         align_all = entry_alignment;
 431                 }
 432         }
 433
 434         set_type_alignment_bytes(ir_type, align_all);
 435         set_type_size_bytes(ir_type, size);
 436         set_type_state(ir_type, layout_fixed);
 437
 438         return ir_type;
 439 }
 440
 441 static ir_type *get_ir_type(type_t *type)
 442 {
 443         assert(type != NULL);
 444
 445         type = skip_typeref(type);
 446
 447         if(type->firm_type != NULL) {
 448                 assert(type->firm_type != INVALID_TYPE);
 449                 return type->firm_type;
 450         }
 451
 452         ir_type *firm_type = NULL;
 453         switch(type->type) {
 454         case TYPE_ATOMIC:
 455                 firm_type = create_atomic_type((atomic_type_t*) type);
 456                 break;
 457         case TYPE_FUNCTION:
 458                 firm_type = create_method_type((function_type_t*) type);
 459                 break;
 460         case TYPE_POINTER:
 461                 firm_type = create_pointer_type((pointer_type_t*) type);
 462                 break;
 463         case TYPE_ARRAY:
 464                 firm_type = create_array_type((array_type_t*) type);
 465                 break;
 466         case TYPE_COMPOUND_STRUCT:
 467                 firm_type = create_struct_type((compound_type_t*) type);
 468                 break;
 469         case TYPE_COMPOUND_UNION:
 470                 firm_type = create_union_type((compound_type_t*) type);
 471                 break;
 472         case TYPE_ENUM:
 473                 firm_type = ir_type_int;
 474                 break;
 475         case TYPE_BUILTIN:
 476         case TYPE_TYPEOF:
 477         case TYPE_TYPEDEF:
 478         case TYPE_INVALID:
 479                 break;
 480         }
 481         if(firm_type == NULL)
 482                 panic("unknown type found");
 483
 484         type->firm_type = firm_type;
 485         return firm_type;
 486 }
 487
 488 static inline ir_mode *get_ir_mode(type_t *type)
 489 {
 490         ir_type *irtype = get_ir_type(type);
 491         ir_mode *mode   = get_type_mode(irtype);
 492         assert(mode != NULL);
 493         return mode;
 494 }
 495
 496 static ir_entity* get_function_entity(declaration_t *declaration)
 497 {
 498         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 499                 return declaration->v.entity;
 500         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 501
 502         symbol_t *symbol = declaration->symbol;
 503         ident    *id     = new_id_from_str(symbol->string);
 504
 505         ir_type  *global_type    = get_glob_type();
 506         ir_type  *ir_type_method = get_ir_type(declaration->type);
 507         assert(is_Method_type(ir_type_method));
 508
 509         type_t    *type   = declaration->type;
 510         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 511         set_entity_ld_ident(entity, id);
 512         if(declaration->storage_class & STORAGE_CLASS_STATIC
 513                         || type->qualifiers & TYPE_QUALIFIER_INLINE) {
 514                 set_entity_visibility(entity, visibility_local);
 515         } else if(declaration->init.statement != NULL) {
 516                 set_entity_visibility(entity, visibility_external_visible);
 517         } else {
 518                 set_entity_visibility(entity, visibility_external_allocated);
 519         }
 520
 521         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 522         declaration->v.entity         = entity;
 523
 524         return entity;
 525 }
 526
 527
 528
 529 static ir_node *expression_to_firm(const expression_t *expression);
 530 static ir_node *_expression_to_firm(const expression_t *expression);
 531
 532 static dbg_info *get_dbg_info(const source_position_t *pos)
 533 {
 534         return (dbg_info*) pos;
 535 }
 536
 537 static ir_node *const_to_firm(const const_t *cnst)
 538 {
 539         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 540         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 541
 542         tarval   *tv;
 543         if(mode_is_float(mode)) {
 544                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 545         } else {
 546                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 547         }
 548
 549         return new_d_Const(dbgi, mode, tv);
 550 }
 551
 552 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 553 {
 554         assert(entity != NULL);
 555         union symconst_symbol sym;
 556         sym.entity_p = entity;
 557         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 558 }
 559
 560 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 561 {
 562         ir_type   *global_type = get_glob_type();
 563         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 564                                                 ir_type_const_char);
 565
 566         ident     *id     = unique_ident("Lstr");
 567         ir_entity *entity = new_entity(global_type, id, type);
 568         set_entity_ld_ident(entity, id);
 569         set_entity_variability(entity, variability_constant);
 570
 571         ir_type    *elem_type = ir_type_const_char;
 572         ir_mode    *mode      = get_type_mode(elem_type);
 573
 574         const char *string = literal->value;
 575         size_t      slen   = strlen(string) + 1;
 576
 577         set_array_lower_bound_int(type, 0, 0);
 578         set_array_upper_bound_int(type, 0, slen);
 579         set_type_size_bytes(type, slen);
 580         set_type_state(type, layout_fixed);
 581
 582         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 583         for(size_t i = 0; i < slen; ++i) {
 584                 tvs[i] = new_tarval_from_long(string[i], mode);
 585         }
 586
 587         set_array_entity_values(entity, tvs, slen);
 588         free(tvs);
 589
 590         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 591
 592         return create_symconst(dbgi, entity);
 593 }
 594
 595 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 596                                           dbg_info *dbgi)
 597 {
 598         ir_mode *mode     = get_ir_mode(type);
 599         ir_node *memory   = get_store();
 600         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 601         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 602         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 603         set_store(load_mem);
 604
 605         return load_res;
 606 }
 607
 608 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 609 {
 610         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 611         declaration_t *declaration = ref->declaration;
 612         type_t        *type        = declaration->type;
 613         ir_mode       *mode        = get_ir_mode(type);
 614
 615         switch((declaration_type_t) declaration->declaration_type) {
 616         case DECLARATION_TYPE_UNKNOWN:
 617                 break;
 618         case DECLARATION_TYPE_LOCAL_VARIABLE:
 619                 return get_value(declaration->v.value_number, mode);
 620         case DECLARATION_TYPE_FUNCTION: {
 621                 return create_symconst(dbgi, declaration->v.entity);
 622         }
 623         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 624                 ir_entity *entity   = declaration->v.entity;
 625                 ir_node   *symconst = create_symconst(dbgi, entity);
 626                 return load_from_expression_addr(type, symconst, dbgi);
 627         }
 628         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 629         case DECLARATION_TYPE_COMPOUND_MEMBER:
 630                 panic("not implemented reference type");
 631         }
 632
 633         panic("reference to declaration with unknown type found");
 634 }
 635
 636 static ir_node *reference_addr(const reference_expression_t *ref)
 637 {
 638         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 639         declaration_t *declaration = ref->declaration;
 640
 641         switch((declaration_type_t) declaration->declaration_type) {
 642         case DECLARATION_TYPE_UNKNOWN:
 643                 break;
 644         case DECLARATION_TYPE_LOCAL_VARIABLE:
 645                 panic("local variable without entity has no address");
 646         case DECLARATION_TYPE_FUNCTION: {
 647                 return create_symconst(dbgi, declaration->v.entity);
 648         }
 649         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 650                 ir_entity *entity   = declaration->v.entity;
 651                 ir_node   *symconst = create_symconst(dbgi, entity);
 652                 return symconst;
 653         }
 654         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 655         case DECLARATION_TYPE_COMPOUND_MEMBER:
 656                 panic("not implemented reference type");
 657         }
 658
 659         panic("reference to declaration with unknown type found");
 660 }
 661
 662 static ir_node *call_expression_to_firm(const call_expression_t *call)
 663 {
 664         assert(get_cur_block() != NULL);
 665
 666         expression_t  *function = call->function;
 667         ir_node       *callee   = expression_to_firm(function);
 668
 669         assert(function->datatype->type == TYPE_FUNCTION);
 670         function_type_t *function_type = (function_type_t*) function->datatype;
 671
 672         int              n_parameters = 0;
 673         call_argument_t *argument     = call->arguments;
 674         for( ; argument != NULL; argument = argument->next) {
 675                 ++n_parameters;
 676         }
 677
 678         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 679         ir_type *new_method_type = NULL;
 680         if(function_type->variadic || function_type->unspecified_parameters) {
 681                 /* we need to construct a new method type matching the call
 682                  * arguments... */
 683                 int n_res       = get_method_n_ress(ir_method_type);
 684                 new_method_type = new_type_method(unique_ident("calltype"),
 685                                                   n_parameters, n_res);
 686                 set_method_calling_convention(new_method_type,
 687                                get_method_calling_convention(ir_method_type));
 688                 set_method_additional_properties(new_method_type,
 689                                get_method_additional_properties(ir_method_type));
 690
 691                 for(int i = 0; i < n_res; ++i) {
 692                         set_method_res_type(new_method_type, i,
 693                                             get_method_res_type(ir_method_type, i));
 694                 }
 695         }
 696         ir_node *in[n_parameters];
 697
 698         argument = call->arguments;
 699         int n = 0;
 700         for( ; argument != NULL; argument = argument->next) {
 701                 expression_t *expression = argument->expression;
 702                 ir_node      *arg_node   = expression_to_firm(expression);
 703
 704                 in[n] = arg_node;
 705                 if(new_method_type != NULL) {
 706                         ir_type *irtype = get_ir_type(expression->datatype);
 707                         set_method_param_type(new_method_type, n, irtype);
 708                 }
 709
 710                 n++;
 711         }
 712         assert(n == n_parameters);
 713
 714         if(new_method_type != NULL)
 715                 ir_method_type = new_method_type;
 716
 717         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 718         ir_node  *store = get_store();
 719         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 720                                      ir_method_type);
 721         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 722         set_store(mem);
 723
 724         type_t  *result_type = function_type->result_type;
 725         ir_node *result      = NULL;
 726         if(result_type != type_void) {
 727                 ir_mode *mode    = get_ir_mode(result_type);
 728                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 729                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 730         }
 731
 732         return result;
 733 }
 734
 735 static ir_node *expression_to_addr(const expression_t *expression);
 736
 737 static void set_value_for_expression(const expression_t *expression,
 738                                      ir_node *value)
 739 {
 740         if(expression->type == EXPR_REFERENCE) {
 741                 reference_expression_t *ref = (reference_expression_t*) expression;
 742
 743                 declaration_t *declaration = ref->declaration;
 744                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 745                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 746                         set_value(declaration->v.value_number, value);
 747                         return;
 748                 }
 749         }
 750
 751         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 752         ir_node  *addr      = expression_to_addr(expression);
 753         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 754         ir_node  *memory    = get_store();
 755         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 756         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 757         set_store(store_mem);
 758 }
 759
 760 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 761 {
 762         ir_mode *value_mode = get_irn_mode(value);
 763
 764         if(value_mode == dest_mode)
 765                 return value;
 766
 767         if(dest_mode == mode_b) {
 768                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 769                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 770                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 771                 return proj;
 772         }
 773
 774         return new_d_Conv(dbgi, value, dest_mode);
 775 }
 776
 777 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 778 {
 779         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 780         type_t   *type = expression->expression.datatype;
 781         ir_mode  *mode = get_ir_mode(type);
 782
 783         if(expression->type == UNEXPR_TAKE_ADDRESS)
 784                 return expression_to_addr(expression->value);
 785
 786         const expression_t *value      = expression->value;
 787         ir_node            *value_node = expression_to_firm(value);
 788
 789         switch(expression->type) {
 790         case UNEXPR_NEGATE:
 791                 return new_d_Minus(dbgi, value_node, mode);
 792         case UNEXPR_PLUS:
 793                 return value_node;
 794         case UNEXPR_BITWISE_NEGATE:
 795                 return new_d_Not(dbgi, value_node, mode);
 796         case UNEXPR_NOT:
 797                 if(get_irn_mode(value_node) != mode_b) {
 798                         value_node = create_conv(dbgi, value_node, mode_b);
 799                 }
 800                 value_node = new_d_Not(dbgi, value_node, mode_b);
 801                 if(mode != mode_b) {
 802                         value_node = create_conv(dbgi, value_node, mode);
 803                 }
 804                 return value_node;
 805         case UNEXPR_DEREFERENCE:
 806                 return load_from_expression_addr(type, value_node, dbgi);
 807         case UNEXPR_POSTFIX_INCREMENT: {
 808                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 809                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 810                 set_value_for_expression(value, new_value);
 811                 return value_node;
 812         }
 813         case UNEXPR_POSTFIX_DECREMENT: {
 814                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 815                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 816                 set_value_for_expression(value, new_value);
 817                 return value_node;
 818         }
 819         case UNEXPR_PREFIX_INCREMENT: {
 820                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 821                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 822                 set_value_for_expression(value, new_value);
 823                 return new_value;
 824         }
 825         case UNEXPR_PREFIX_DECREMENT: {
 826                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 827                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 828                 set_value_for_expression(value, new_value);
 829                 return new_value;
 830         }
 831         case UNEXPR_CAST:
 832                 return create_conv(dbgi, value_node, mode);
 833
 834         case UNEXPR_TAKE_ADDRESS:
 835         case UNEXPR_INVALID:
 836                 break;
 837         }
 838         panic("invalid UNEXPR type found");
 839 }
 840
 841 static long get_pnc(binary_expression_type_t type)
 842 {
 843         switch(type) {
 844         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 845         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 846         case BINEXPR_LESS:         return pn_Cmp_Lt;
 847         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 848         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 849         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 850         default:
 851                 break;
 852         }
 853         panic("trying to get pn_Cmp from non-comparison binexpr type");
 854 }
 855
 856 static ir_node *create_lazy_op(const binary_expression_t *expression)
 857 {
 858         bool is_or = (expression->type == BINEXPR_LOGICAL_OR);
 859         assert(is_or || expression->type == BINEXPR_LOGICAL_AND);
 860
 861         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 862         ir_node  *val1 = expression_to_firm(expression->left);
 863         val1           = create_conv(dbgi, val1, mode_b);
 864
 865         ir_node *cond       = new_d_Cond(dbgi, val1);
 866         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 867         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 868
 869         ir_node *fallthrough_block = new_immBlock();
 870
 871         /* the true case */
 872         ir_node *calc_val2_block = new_immBlock();
 873         if(is_or) {
 874                 add_immBlock_pred(calc_val2_block, false_proj);
 875         } else {
 876                 add_immBlock_pred(calc_val2_block, true_proj);
 877         }
 878
 879         mature_immBlock(calc_val2_block);
 880
 881         ir_node *val2 = expression_to_firm(expression->right);
 882         val2          = create_conv(dbgi, val2, mode_b);
 883         if(get_cur_block() != NULL) {
 884                 ir_node *jmp = new_d_Jmp(dbgi);
 885                 add_immBlock_pred(fallthrough_block, jmp);
 886         }
 887
 888         /* fallthrough */
 889         ir_node *constb;
 890         if(is_or) {
 891                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_true());
 892                 add_immBlock_pred(fallthrough_block, true_proj);
 893         } else {
 894                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_false());
 895                 add_immBlock_pred(fallthrough_block, false_proj);
 896         }
 897         mature_immBlock(fallthrough_block);
 898
 899         set_cur_block(fallthrough_block);
 900
 901         ir_node *in[2] = { val2, constb };
 902         ir_node *val   = new_d_Phi(dbgi, 2, in, mode_b);
 903
 904         return val;
 905 }
 906
 907 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 908                                             ir_node *right, ir_mode *mode);
 909
 910 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 911                                         create_arithmetic_func func)
 912 {
 913         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 914         ir_node  *left  = expression_to_firm(expression->left);
 915         ir_node  *right = expression_to_firm(expression->right);
 916         type_t   *type  = expression->expression.datatype;
 917         ir_mode  *mode  = get_ir_mode(type);
 918         ir_node  *res   = func(dbgi, left, right, mode);
 919
 920         return res;
 921 }
 922
 923 static ir_node *create_add(const binary_expression_t *expression)
 924 {
 925         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 926         ir_node  *left  = expression_to_firm(expression->left);
 927         ir_node  *right = expression_to_firm(expression->right);
 928         type_t   *type  = expression->expression.datatype;
 929         ir_mode  *mode  = get_ir_mode(type);
 930
 931         expression_t *expr_left  = expression->left;
 932         expression_t *expr_right = expression->right;
 933         type_t       *type_left  = skip_typeref(expr_left->datatype);
 934         type_t       *type_right = skip_typeref(expr_right->datatype);
 935
 936         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
 937                 return new_d_Add(dbgi, left, right, mode);
 938         }
 939
 940         ir_node        *pointer;
 941         ir_node        *integer;
 942         pointer_type_t *pointer_type;
 943         if(type_left->type == TYPE_POINTER) {
 944                 pointer      = left;
 945                 integer      = right;
 946                 pointer_type = (pointer_type_t*) type_left;
 947         } else {
 948                 assert(type_right->type == TYPE_POINTER);
 949                 pointer      = right;
 950                 integer      = left;
 951                 pointer_type = (pointer_type_t*) type_right;
 952         }
 953
 954         type_t   *points_to = pointer_type->points_to;
 955         unsigned  elem_size = get_type_size(points_to);
 956
 957         assert(elem_size >= 1);
 958         if(elem_size > 1) {
 959                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
 960                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
 961                 integer = mul;
 962         }
 963
 964         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
 965
 966         return res;
 967 }
 968
 969 static ir_node *create_sub(const binary_expression_t *expression)
 970 {
 971         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 972         ir_node  *left  = expression_to_firm(expression->left);
 973         ir_node  *right = expression_to_firm(expression->right);
 974         type_t   *type  = expression->expression.datatype;
 975         ir_mode  *mode  = get_ir_mode(type);
 976
 977         expression_t *expr_left  = expression->left;
 978         expression_t *expr_right = expression->right;
 979         type_t       *type_left  = skip_typeref(expr_left->datatype);
 980         type_t       *type_right = skip_typeref(expr_right->datatype);
 981
 982         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
 983                         || (type_left->type == TYPE_POINTER
 984                                 && type_right->type == TYPE_POINTER)) {
 985                 return new_d_Sub(dbgi, left, right, mode);
 986         }
 987
 988         assert(type_right->type == TYPE_POINTER);
 989         ir_node        *pointer      = left;
 990         ir_node        *integer      = right;
 991         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
 992
 993         type_t   *points_to = pointer_type->points_to;
 994         unsigned  elem_size = get_type_size(points_to);
 995
 996         assert(elem_size >= 1);
 997         if(elem_size > 1) {
 998                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
 999                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
1000                 integer = mul;
1001         }
1002
1003         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
1004
1005         return res;
1006 }
1007
1008
1009
1010 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1011 {
1012         binary_expression_type_t type = expression->type;
1013         switch(type) {
1014         case BINEXPR_EQUAL:
1015         case BINEXPR_NOTEQUAL:
1016         case BINEXPR_LESS:
1017         case BINEXPR_LESSEQUAL:
1018         case BINEXPR_GREATER:
1019         case BINEXPR_GREATEREQUAL: {
1020                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1021                 ir_node *left  = expression_to_firm(expression->left);
1022                 ir_node *right = expression_to_firm(expression->right);
1023                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1024                 long     pnc   = get_pnc(type);
1025                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1026                 return proj;
1027         }
1028         case BINEXPR_ASSIGN: {
1029                 ir_node *right = expression_to_firm(expression->right);
1030                 set_value_for_expression(expression->left, right);
1031                 return right;
1032         }
1033         case BINEXPR_ADD:
1034                 return create_add(expression);
1035         case BINEXPR_SUB:
1036                 return create_sub(expression);
1037         case BINEXPR_MUL:
1038                 return create_arithmetic_binop(expression, new_d_Mul);
1039         case BINEXPR_BITWISE_AND:
1040                 return create_arithmetic_binop(expression, new_d_And);
1041         case BINEXPR_BITWISE_OR:
1042                 return create_arithmetic_binop(expression, new_d_Or);
1043         case BINEXPR_BITWISE_XOR:
1044                 return create_arithmetic_binop(expression, new_d_Eor);
1045         case BINEXPR_SHIFTLEFT:
1046                 return create_arithmetic_binop(expression, new_d_Shl);
1047         case BINEXPR_SHIFTRIGHT:
1048                 return create_arithmetic_binop(expression, new_d_Shr);
1049         case BINEXPR_LOGICAL_AND:
1050         case BINEXPR_LOGICAL_OR:
1051                 return create_lazy_op(expression);
1052         default:
1053                 panic("TODO binexpr type");
1054         }
1055 }
1056
1057 static ir_node *array_access_addr(const array_access_expression_t *expression)
1058 {
1059         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1060
1061         ir_node *base_addr = expression_to_firm(expression->array_ref);
1062         ir_node *offset    = expression_to_firm(expression->index);
1063         offset             = create_conv(dbgi, offset, mode_Iu);
1064
1065         unsigned elem_size       = get_type_size(expression->expression.datatype);
1066         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1067         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1068                                              mode_Iu);
1069         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1070
1071         return result;
1072 }
1073
1074 static ir_node *array_access_to_firm(
1075                 const array_access_expression_t *expression)
1076 {
1077
1078         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1079         ir_node  *addr = array_access_addr(expression);
1080         type_t   *type = expression->expression.datatype;
1081
1082         return load_from_expression_addr(type, addr, dbgi);
1083 }
1084
1085 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1086 {
1087         type_t *type = expression->type;
1088         if(type == NULL) {
1089                 type = expression->size_expression->datatype;
1090                 assert(type != NULL);
1091         }
1092
1093         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1094         unsigned  size      = get_type_size(type);
1095         ir_node  *size_node = new_Const_long(mode, size);
1096
1097         return size_node;
1098 }
1099
1100 static ir_node *expression_to_addr(const expression_t *expression)
1101 {
1102         switch(expression->type) {
1103         case EXPR_REFERENCE:
1104                 return reference_addr((const reference_expression_t*) expression);
1105         case EXPR_ARRAY_ACCESS:
1106                 return array_access_addr((const array_access_expression_t*) expression);
1107         default:
1108                 break;
1109         }
1110         panic("trying to get address of non-lvalue");
1111 }
1112
1113 static ir_node *_expression_to_firm(const expression_t *expression)
1114 {
1115         switch(expression->type) {
1116         case EXPR_CONST:
1117                 return const_to_firm((const const_t*) expression);
1118         case EXPR_STRING_LITERAL:
1119                 return string_literal_to_firm((const string_literal_t*) expression);
1120         case EXPR_REFERENCE:
1121                 return reference_expression_to_firm(
1122                                 (const reference_expression_t*) expression);
1123         case EXPR_CALL:
1124                 return call_expression_to_firm((const call_expression_t*) expression);
1125         case EXPR_UNARY:
1126                 return unary_expression_to_firm((const unary_expression_t*) expression);
1127         case EXPR_BINARY:
1128                 return binary_expression_to_firm(
1129                                 (const binary_expression_t*) expression);
1130         case EXPR_ARRAY_ACCESS:
1131                 return array_access_to_firm(
1132                                 (const array_access_expression_t*) expression);
1133         case EXPR_SIZEOF:
1134                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1135         default:
1136                 break;
1137         }
1138         panic("unsupported expression found");
1139 }
1140
1141 static ir_node *expression_to_firm(const expression_t *expression)
1142 {
1143         ir_node *res  = _expression_to_firm(expression);
1144
1145         if(expression->datatype == type_void)
1146                 return NULL;
1147
1148         ir_mode *mode = get_ir_mode(expression->datatype);
1149         res           = create_conv(NULL, res, mode);
1150         return res;
1151 }
1152
1153
1154 static void statement_to_firm(statement_t *statement);
1155
1156 static void return_statement_to_firm(return_statement_t *statement)
1157 {
1158         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1159         ir_node  *ret;
1160
1161         if(statement->return_value != NULL) {
1162                 ir_node *retval = expression_to_firm(statement->return_value);
1163                 ir_node *in[1];
1164
1165                 in[0] = retval;
1166                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1167         } else {
1168                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1169         }
1170         ir_node *end_block = get_irg_end_block(current_ir_graph);
1171         add_immBlock_pred(end_block, ret);
1172
1173         set_cur_block(NULL);
1174 }
1175
1176 static void compound_statement_to_firm(compound_statement_t *compound)
1177 {
1178         statement_t *statement = compound->statements;
1179         for( ; statement != NULL; statement = statement->next) {
1180                 //context2firm(&statement->context);
1181                 statement_to_firm(statement);
1182         }
1183 }
1184
1185 static void expression_statement_to_firm(expression_statement_t *statement)
1186 {
1187         expression_to_firm(statement->expression);
1188 }
1189
1190 static void if_statement_to_firm(if_statement_t *statement)
1191 {
1192         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
1193         ir_node  *condition = _expression_to_firm(statement->condition);
1194         assert(condition != NULL);
1195
1196         /* make sure we have a mode_b condition */
1197         condition = create_conv(dbgi, condition, mode_b);
1198
1199         ir_node *cond       = new_d_Cond(dbgi, condition);
1200         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1201         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1202
1203         ir_node *fallthrough_block = new_immBlock();
1204
1205         /* the true (blocks) */
1206         ir_node *true_block = new_immBlock();
1207         add_immBlock_pred(true_block, true_proj);
1208         mature_immBlock(true_block);
1209
1210         statement_to_firm(statement->true_statement);
1211         if(get_cur_block() != NULL) {
1212                 ir_node *jmp = new_Jmp();
1213                 add_immBlock_pred(fallthrough_block, jmp);
1214         }
1215
1216         /* the false (blocks) */
1217         if(statement->false_statement != NULL) {
1218                 ir_node *false_block = new_immBlock();
1219                 add_immBlock_pred(false_block, false_proj);
1220                 mature_immBlock(false_block);
1221
1222                 statement_to_firm(statement->false_statement);
1223                 if(get_cur_block() != NULL) {
1224                         ir_node *jmp = new_Jmp();
1225                         add_immBlock_pred(fallthrough_block, jmp);
1226                 }
1227         } else {
1228                 add_immBlock_pred(fallthrough_block, false_proj);
1229         }
1230         mature_immBlock(fallthrough_block);
1231
1232         set_cur_block(fallthrough_block);
1233 }
1234
1235 static void while_statement_to_firm(while_statement_t *statement)
1236 {
1237         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1238
1239         ir_node *jmp = NULL;
1240         if(get_cur_block() != NULL) {
1241                 jmp = new_Jmp();
1242         }
1243
1244         /* create the header block */
1245         ir_node *header_block = new_immBlock();
1246         if(jmp != NULL) {
1247                 add_immBlock_pred(header_block, jmp);
1248         }
1249
1250         /* create the condition */
1251         ir_node *condition = _expression_to_firm(statement->condition);
1252         condition          = create_conv(dbgi, condition, mode_b);
1253
1254         ir_node *cond       = new_d_Cond(dbgi, condition);
1255         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1256         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1257
1258         /* the false block */
1259         ir_node *false_block = new_immBlock();
1260         add_immBlock_pred(false_block, false_proj);
1261
1262         /* the loop body */
1263         ir_node *body_block = new_immBlock();
1264         add_immBlock_pred(body_block, true_proj);
1265         mature_immBlock(body_block);
1266
1267         ir_node *old_continue_label = continue_label;
1268         ir_node *old_break_label    = break_label;
1269         continue_label              = header_block;
1270         break_label                 = false_block;
1271
1272         statement_to_firm(statement->body);
1273
1274         assert(continue_label == header_block);
1275         assert(break_label    == false_block);
1276         continue_label = old_continue_label;
1277         break_label    = old_break_label;
1278
1279         if(get_cur_block() != NULL) {
1280                 ir_node *jmp = new_Jmp();
1281                 add_immBlock_pred(header_block, jmp);
1282         }
1283
1284         mature_immBlock(header_block);
1285         mature_immBlock(false_block);
1286
1287         set_cur_block(false_block);
1288 }
1289
1290 static void do_while_statement_to_firm(do_while_statement_t *statement)
1291 {
1292         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1293
1294         ir_node *jmp = NULL;
1295         if(get_cur_block() != NULL) {
1296                 jmp = new_Jmp();
1297         }
1298
1299         /* create the header block */
1300         ir_node *header_block = new_immBlock();
1301
1302         /* the false block */
1303         ir_node *false_block = new_immBlock();
1304
1305         /* the loop body */
1306         ir_node *body_block = new_immBlock();
1307         if(jmp != NULL) {
1308                 add_immBlock_pred(body_block, jmp);
1309         }
1310
1311         ir_node *old_continue_label = continue_label;
1312         ir_node *old_break_label    = break_label;
1313         continue_label              = header_block;
1314         break_label                 = false_block;
1315
1316         statement_to_firm(statement->body);
1317
1318         assert(continue_label == header_block);
1319         assert(break_label    == false_block);
1320         continue_label = old_continue_label;
1321         break_label    = old_break_label;
1322
1323         if(get_cur_block() == NULL) {
1324                 mature_immBlock(header_block);
1325                 mature_immBlock(body_block);
1326                 return;
1327         }
1328
1329         ir_node *body_jmp = new_Jmp();
1330         add_immBlock_pred(header_block, body_jmp);
1331         mature_immBlock(header_block);
1332
1333         /* create the condition */
1334         ir_node *condition = _expression_to_firm(statement->condition);
1335         condition          = create_conv(dbgi, condition, mode_b);
1336
1337         ir_node *cond       = new_d_Cond(dbgi, condition);
1338         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1339         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1340
1341         add_immBlock_pred(body_block, true_proj);
1342         mature_immBlock(body_block);
1343
1344         add_immBlock_pred(false_block, false_proj);
1345         mature_immBlock(false_block);
1346
1347         set_cur_block(false_block);
1348 }
1349
1350 static void for_statement_to_firm(for_statement_t *statement)
1351 {
1352         dbg_info *const dbgi = get_dbg_info(&statement->statement.source_position);
1353
1354         ir_node *jmp = NULL;
1355         if (get_cur_block() != NULL) {
1356                 if(statement->initialisation != NULL) {
1357                         expression_to_firm(statement->initialisation);
1358                 }
1359                 jmp = new_Jmp();
1360         }
1361
1362         /* create the step block */
1363         ir_node *const step_block = new_immBlock();
1364         expression_to_firm(statement->step);
1365         ir_node *const step_jmp   = new_Jmp();
1366
1367         /* create the header block */
1368         ir_node *const header_block = new_immBlock();
1369         if (jmp != NULL) {
1370                 add_immBlock_pred(header_block, jmp);
1371         }
1372         add_immBlock_pred(header_block, step_jmp);
1373
1374         /* create the condition */
1375         ir_node *const cond_expr = _expression_to_firm(statement->condition);
1376         ir_node *const condition = create_conv(dbgi, cond_expr, mode_b);
1377
1378         ir_node *const cond       = new_d_Cond(dbgi, condition);
1379         ir_node *const true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1380         ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1381
1382         /* the false block */
1383         ir_node *const false_block = new_immBlock();
1384         add_immBlock_pred(false_block, false_proj);
1385
1386         /* the loop body */
1387         ir_node *const body_block = new_immBlock();
1388         add_immBlock_pred(body_block, true_proj);
1389         mature_immBlock(body_block);
1390
1391         ir_node *const old_continue_label = continue_label;
1392         ir_node *const old_break_label    = break_label;
1393         continue_label = step_block;
1394         break_label    = false_block;
1395
1396         statement_to_firm(statement->body);
1397
1398         assert(continue_label == step_block);
1399         assert(break_label    == false_block);
1400         continue_label = old_continue_label;
1401         break_label    = old_break_label;
1402
1403         if (get_cur_block() != NULL) {
1404                 ir_node *const jmp = new_Jmp();
1405                 add_immBlock_pred(step_block, jmp);
1406         }
1407
1408         mature_immBlock(step_block);
1409         mature_immBlock(header_block);
1410         mature_immBlock(false_block);
1411
1412         set_cur_block(false_block);
1413 }
1414
1415 static void create_declaration_entity(declaration_t *declaration,
1416                                       declaration_type_t declaration_type,
1417                                       ir_type *parent_type)
1418 {
1419         ident     *id     = new_id_from_str(declaration->symbol->string);
1420         ir_type   *irtype = get_ir_type(declaration->type);
1421         ir_entity *entity = new_entity(parent_type, id, irtype);
1422         set_entity_ld_ident(entity, id);
1423
1424         declaration->declaration_type = declaration_type;
1425         declaration->v.entity         = entity;
1426         set_entity_variability(entity, variability_uninitialized);
1427         /* TODO: visibility? */
1428 }
1429
1430 static void create_initializer(declaration_t *declaration)
1431 {
1432         initializer_t *initializer = declaration->init.initializer;
1433         if(initializer == NULL)
1434                 return;
1435
1436         if(initializer->type == INITIALIZER_VALUE) {
1437                 assert(initializer->designator == NULL);
1438                 assert(initializer->next == NULL);
1439                 ir_node *init_node = expression_to_firm(initializer->v.value);
1440
1441                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1442                         set_value(declaration->v.value_number, init_node);
1443                 } else {
1444                         panic("initializer not completely implemented yet");
1445                 }
1446         } else {
1447                 assert(initializer->type == INITIALIZER_LIST);
1448                 panic("list initializer not supported yet");
1449         }
1450 }
1451
1452 static void create_local_variable(declaration_t *declaration)
1453 {
1454         bool needs_entity = declaration->address_taken;
1455
1456         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1457
1458         if(needs_entity) {
1459                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1460                 create_declaration_entity(declaration,
1461                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1462                                           frame_type);
1463         } else {
1464                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1465                 declaration->v.value_number   = next_value_number_function;
1466                 ++next_value_number_function;
1467         }
1468
1469         create_initializer(declaration);
1470 }
1471
1472 static void declaration_statement_to_firm(declaration_statement_t *statement)
1473 {
1474         declaration_t *declaration = statement->declarations_begin;
1475         declaration_t *end         = statement->declarations_end->next;
1476         for( ; declaration != end; declaration = declaration->next) {
1477                 type_t *type = declaration->type;
1478
1479                 switch(declaration->storage_class) {
1480                 case STORAGE_CLASS_TYPEDEF:
1481                         continue;
1482                 case STORAGE_CLASS_STATIC:
1483                         panic("static local vars not implemented yet");
1484                 case STORAGE_CLASS_ENUM_ENTRY:
1485                         panic("enum entry declaration in local block found");
1486                 case STORAGE_CLASS_EXTERN:
1487                         panic("extern declaration in local block found");
1488                 case STORAGE_CLASS_NONE:
1489                 case STORAGE_CLASS_AUTO:
1490                 case STORAGE_CLASS_REGISTER:
1491                         if(type->type == TYPE_FUNCTION) {
1492                                 panic("nested functions not supported yet");
1493                         } else {
1494                                 create_local_variable(declaration);
1495                         }
1496                         continue;
1497                 }
1498                 panic("invalid storage class found");
1499         }
1500 }
1501
1502 static void create_jump_statement(const statement_t *statement,
1503                                   ir_node *target_block)
1504 {
1505         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1506         ir_node  *jump = new_d_Jmp(dbgi);
1507         add_immBlock_pred(target_block, jump);
1508
1509         set_cur_block(NULL);
1510 }
1511
1512 static void switch_statement_to_firm(const switch_statement_t *statement)
1513 {
1514         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1515
1516         ir_node *expression  = expression_to_firm(statement->expression);
1517         ir_node *cond        = new_d_Cond(dbgi, expression);
1518         ir_node *break_block = new_immBlock();
1519
1520         set_cur_block(NULL);
1521
1522         ir_node *old_switch_cond = current_switch_cond;
1523         ir_node *old_break_label = break_label;
1524         current_switch_cond      = cond;
1525         break_label              = break_block;
1526
1527         statement_to_firm(statement->body);
1528
1529         if(get_cur_block() != NULL) {
1530                 ir_node *jmp = new_Jmp();
1531                 add_immBlock_pred(break_block, jmp);
1532         }
1533
1534         assert(current_switch_cond == cond);
1535         assert(break_label         == break_block);
1536         current_switch_cond = old_switch_cond;
1537         break_label         = old_break_label;
1538
1539         mature_immBlock(break_block);
1540         set_cur_block(break_block);
1541 }
1542
1543 static void case_label_to_firm(const case_label_statement_t *statement)
1544 {
1545         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1546
1547         /* let's create a node and hope firm constant folding creates a Const
1548          * node... */
1549         ir_node *proj;
1550         set_cur_block(get_nodes_block(current_switch_cond));
1551         if(statement->expression) {
1552                 ir_node *cnst = expression_to_firm(statement->expression);
1553                 if(!is_Const(cnst)) {
1554                         panic("couldn't fold constant for case label");
1555                 }
1556                 tarval *tv = get_Const_tarval(cnst);
1557                 if(!mode_is_int(get_tarval_mode(tv))) {
1558                         panic("case label not an integer");
1559                 }
1560
1561                 long pn = get_tarval_long(tv);
1562                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1563                         /* oops someone detected our cheating... */
1564                         panic("magic default pn used");
1565                 }
1566                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1567         } else {
1568                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1569                                          MAGIC_DEFAULT_PN_NUMBER);
1570         }
1571
1572         ir_node *block = new_immBlock();
1573         add_immBlock_pred(block, proj);
1574         mature_immBlock(block);
1575 }
1576
1577 static void statement_to_firm(statement_t *statement)
1578 {
1579         switch(statement->type) {
1580         case STATEMENT_COMPOUND:
1581                 compound_statement_to_firm((compound_statement_t*) statement);
1582                 return;
1583         case STATEMENT_RETURN:
1584                 return_statement_to_firm((return_statement_t*) statement);
1585                 return;
1586         case STATEMENT_EXPRESSION:
1587                 expression_statement_to_firm((expression_statement_t*) statement);
1588                 return;
1589         case STATEMENT_IF:
1590                 if_statement_to_firm((if_statement_t*) statement);
1591                 return;
1592         case STATEMENT_WHILE:
1593                 while_statement_to_firm((while_statement_t*) statement);
1594                 return;
1595         case STATEMENT_DO_WHILE:
1596                 do_while_statement_to_firm((do_while_statement_t*) statement);
1597                 return;
1598         case STATEMENT_DECLARATION:
1599                 declaration_statement_to_firm((declaration_statement_t*) statement);
1600                 return;
1601         case STATEMENT_BREAK:
1602                 create_jump_statement(statement, break_label);
1603                 return;
1604         case STATEMENT_CONTINUE:
1605                 create_jump_statement(statement, continue_label);
1606                 return;
1607         case STATEMENT_SWITCH:
1608                 switch_statement_to_firm((switch_statement_t*) statement);
1609                 return;
1610         case STATEMENT_CASE_LABEL:
1611                 case_label_to_firm((case_label_statement_t*) statement);
1612                 return;
1613         case STATEMENT_FOR:
1614                 for_statement_to_firm((for_statement_t*) statement);
1615                 return;
1616         default:
1617                 break;
1618         }
1619         panic("Statement not implemented\n");
1620 }
1621
1622 static int get_function_n_local_vars(declaration_t *declaration)
1623 {
1624         (void) declaration;
1625         /* TODO */
1626         return 30;
1627 }
1628
1629 static void initialize_function_parameters(declaration_t *declaration)
1630 {
1631         ir_graph *irg         = current_ir_graph;
1632         ir_node  *args        = get_irg_args(irg);
1633         ir_node  *start_block = get_irg_start_block(irg);
1634
1635         int            n         = 0;
1636         declaration_t *parameter = declaration->context.declarations;
1637         for( ; parameter != NULL; parameter = parameter->next) {
1638                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
1639
1640                 if(parameter->address_taken) {
1641                         panic("address take from parameter not implemented yet");
1642                 }
1643
1644                 ir_mode *mode = get_ir_mode(parameter->type);
1645                 long     pn   = n;
1646                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
1647                 ++n;
1648
1649                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1650                 parameter->v.value_number   = next_value_number_function;
1651                 ++next_value_number_function;
1652
1653                 set_value(parameter->v.value_number, proj);
1654         }
1655 }
1656
1657 static void create_function(declaration_t *declaration)
1658 {
1659         ir_entity *entity = get_function_entity(declaration);
1660
1661         if(declaration->init.statement == NULL)
1662                 return;
1663
1664         int       n_local_vars = get_function_n_local_vars(declaration);
1665         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
1666         ir_node  *first_block  = get_cur_block();
1667
1668         next_value_number_function = 0;
1669         initialize_function_parameters(declaration);
1670
1671         statement_to_firm(declaration->init.statement);
1672
1673         ir_node *end_block = get_irg_end_block(irg);
1674
1675         /* do we have a return statement yet? */
1676         if(get_cur_block() != NULL) {
1677                 assert(declaration->type->type == TYPE_FUNCTION);
1678                 const function_type_t* const func_type = (const function_type_t*)declaration->type;
1679                 ir_node *ret;
1680                 if (func_type->result_type == type_void) {
1681                         ret = new_Return(get_store(), 0, NULL);
1682                 } else {
1683                         ir_mode *const mode = get_ir_mode(func_type->result_type);
1684                         ir_node *      in[1];
1685                         // §5.1.2.2.3 main implicitly returns 0
1686                         if (strcmp(declaration->symbol->string, "main") == 0) {
1687                                 in[0] = new_Const(mode, get_mode_null(mode));
1688                         } else {
1689                                 in[0] = new_Unknown(mode);
1690                         }
1691                         ret = new_Return(get_store(), 1, in);
1692                 }
1693                 add_immBlock_pred(end_block, ret);
1694         }
1695
1696         mature_immBlock(first_block);
1697         mature_immBlock(end_block);
1698
1699         irg_finalize_cons(irg);
1700
1701         /* finalize the frame type */
1702         ir_type *frame_type = get_irg_frame_type(irg);
1703         int      n          = get_compound_n_members(frame_type);
1704         int      align_all  = 4;
1705         int      offset     = 0;
1706         for(int i = 0; i < n; ++i) {
1707                 ir_entity *entity      = get_compound_member(frame_type, i);
1708                 ir_type   *entity_type = get_entity_type(entity);
1709
1710                 int align = get_type_alignment_bytes(entity_type);
1711                 if(align > align_all)
1712                         align_all = align;
1713                 int misalign = 0;
1714                 if(align > 0) {
1715                         misalign  = offset % align;
1716                         offset   += misalign;
1717                 }
1718
1719                 set_entity_offset(entity, offset);
1720                 offset += get_type_size_bytes(entity_type);
1721         }
1722         set_type_size_bytes(frame_type, offset);
1723         set_type_alignment_bytes(frame_type, align_all);
1724         set_type_state(frame_type, layout_fixed);
1725
1726         irg_vrfy(irg);
1727 }
1728
1729 static void create_global_variable(declaration_t *declaration)
1730 {
1731         ir_type   *global_type = get_glob_type();
1732         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
1733                                   global_type);
1734
1735         ir_entity *entity = declaration->v.entity;
1736         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
1737                 set_entity_visibility(entity, visibility_local);
1738         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
1739                 set_entity_visibility(entity, visibility_external_allocated);
1740         } else {
1741                 set_entity_visibility(entity, visibility_external_visible);
1742         }
1743 }
1744
1745 static void context_to_firm(context_t *context)
1746 {
1747         declaration_t *declaration = context->declarations;
1748         for( ; declaration != NULL; declaration = declaration->next) {
1749                 if(declaration->namespace != NAMESPACE_NORMAL)
1750                         continue;
1751                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
1752                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
1753                         continue;
1754
1755                 type_t *type = declaration->type;
1756                 if(type->type == TYPE_FUNCTION) {
1757                         create_function(declaration);
1758                 } else {
1759                         create_global_variable(declaration);
1760                 }
1761         }
1762 }
1763
1764 void translation_unit_to_firm(translation_unit_t *unit)
1765 {
1766         /* remove me later TODO FIXME */
1767         (void) get_type_size;
1768
1769         /* just to be sure */
1770         continue_label      = NULL;
1771         break_label         = NULL;
1772         current_switch_cond = NULL;
1773
1774         context_to_firm(& unit->context);
1775 }