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 bool      saw_default_label;
  36 static ir_node **imature_blocks;
  37
  38 typedef enum declaration_type_t {
  39         DECLARATION_TYPE_UNKNOWN,
  40         DECLARATION_TYPE_FUNCTION,
  41         DECLARATION_TYPE_GLOBAL_VARIABLE,
  42         DECLARATION_TYPE_LOCAL_VARIABLE,
  43         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  44         DECLARATION_TYPE_COMPOUND_MEMBER,
  45         DECLARATION_TYPE_LABEL_BLOCK,
  46 } declaration_type_t;
  47
  48 static ir_type *get_ir_type(type_t *type);
  49
  50 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  51 {
  52         (void) pos;
  53 #if 0
  54         const declaration_t *declaration = & value_numbers[pos]->declaration;
  55
  56         print_warning_prefix(declaration->source_position);
  57         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  58                         declaration->symbol->string);
  59 #endif
  60         fprintf(stderr, "Some variable might be used uninitialized\n");
  61         return new_r_Unknown(irg, mode);
  62 }
  63
  64 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  65 {
  66         const source_position_t *pos = (const source_position_t*) dbg;
  67         if(pos == NULL)
  68                 return 0;
  69         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  70                                    pos->linenr);
  71 }
  72
  73 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  74 {
  75         const source_position_t *pos = (const source_position_t*) dbg;
  76         if(pos == NULL)
  77                 return NULL;
  78         if(line != NULL)
  79                 *line = pos->linenr;
  80         return pos->input_name;
  81 }
  82
  83 void init_ast2firm(void)
  84 {
  85         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  86         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
  87         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
  88
  89         ir_type_int        = get_ir_type(type_int);
  90         ir_type_const_char = get_ir_type(type_const_char);
  91         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  92                                                        type in firm */
  93         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  94                                               ir_type_void, mode_P_data);
  95
  96         type_void->firm_type = ir_type_void;
  97 }
  98
  99 void exit_ast2firm(void)
 100 {
 101 }
 102
 103 static unsigned unique_id = 0;
 104
 105 static ident *unique_ident(const char *tag)
 106 {
 107         char buf[256];
 108
 109         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 110         unique_id++;
 111         return new_id_from_str(buf);
 112 }
 113
 114 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 115 {
 116         switch(atomic_type->atype) {
 117         case ATOMIC_TYPE_SCHAR:
 118         case ATOMIC_TYPE_CHAR:
 119                 return mode_Bs;
 120         case ATOMIC_TYPE_UCHAR:
 121                 return mode_Bu;
 122         case ATOMIC_TYPE_SHORT:
 123                 return mode_Hs;
 124         case ATOMIC_TYPE_USHORT:
 125                 return mode_Hu;
 126         case ATOMIC_TYPE_LONG:
 127         case ATOMIC_TYPE_INT:
 128                 return mode_Is;
 129         case ATOMIC_TYPE_ULONG:
 130         case ATOMIC_TYPE_UINT:
 131                 return mode_Iu;
 132         case ATOMIC_TYPE_LONGLONG:
 133                 return mode_Ls;
 134         case ATOMIC_TYPE_ULONGLONG:
 135                 return mode_Lu;
 136         case ATOMIC_TYPE_FLOAT:
 137                 return mode_F;
 138         case ATOMIC_TYPE_DOUBLE:
 139                 return mode_D;
 140         case ATOMIC_TYPE_LONG_DOUBLE:
 141                 return mode_E;
 142         case ATOMIC_TYPE_BOOL:
 143                 return mode_b;
 144 #ifdef PROVIDE_COMPLEX
 145         case ATOMIC_TYPE_FLOAT_COMPLEX:
 146         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 147         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 148                 panic("complex lowering not implemented yet");
 149                 break;
 150         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 151         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 152         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 153                 panic("imaginary lowering not implemented yet");
 154                 break;
 155 #endif
 156         case ATOMIC_TYPE_VOID:
 157                 /* firm has no real void... */
 158                 return mode_Is;
 159         case ATOMIC_TYPE_INVALID:
 160                 break;
 161         }
 162         panic("Encountered unknown atomic type");
 163 }
 164
 165
 166 static unsigned get_type_size(type_t *type);
 167
 168 static unsigned get_atomic_type_size(const atomic_type_t *type)
 169 {
 170         switch(type->atype) {
 171         case ATOMIC_TYPE_CHAR:
 172         case ATOMIC_TYPE_SCHAR:
 173         case ATOMIC_TYPE_UCHAR:
 174                 return 1;
 175
 176         case ATOMIC_TYPE_SHORT:
 177         case ATOMIC_TYPE_USHORT:
 178                 return 2;
 179
 180         case ATOMIC_TYPE_BOOL:
 181         case ATOMIC_TYPE_INT:
 182         case ATOMIC_TYPE_UINT:
 183         case ATOMIC_TYPE_LONG:
 184         case ATOMIC_TYPE_ULONG:
 185         case ATOMIC_TYPE_FLOAT:
 186                 return 4;
 187
 188         case ATOMIC_TYPE_LONGLONG:
 189         case ATOMIC_TYPE_ULONGLONG:
 190         case ATOMIC_TYPE_DOUBLE:
 191                 return 8;
 192
 193         case ATOMIC_TYPE_LONG_DOUBLE:
 194                 return 12;
 195
 196         case ATOMIC_TYPE_VOID:
 197                 return 1;
 198
 199         case ATOMIC_TYPE_INVALID:
 200                 break;
 201         }
 202         panic("Trying to determine size of invalid atomic type");
 203 }
 204
 205 static unsigned get_compound_type_size(compound_type_t *type)
 206 {
 207         ir_type *irtype = get_ir_type(&type->type);
 208         return get_type_size_bytes(irtype);
 209 }
 210
 211 static unsigned get_array_type_size(array_type_t *type)
 212 {
 213         ir_type *irtype = get_ir_type(&type->type);
 214         return get_type_size_bytes(irtype);
 215 }
 216
 217 static unsigned get_type_size(type_t *type)
 218 {
 219         type = skip_typeref(type);
 220
 221         switch(type->type) {
 222         case TYPE_ATOMIC:
 223                 return get_atomic_type_size((const atomic_type_t*) type);
 224         case TYPE_ENUM:
 225                 return get_mode_size_bytes(mode_Is);
 226         case TYPE_COMPOUND_UNION:
 227         case TYPE_COMPOUND_STRUCT:
 228                 return get_compound_type_size((compound_type_t*) type);
 229         case TYPE_FUNCTION:
 230                 /* just a pointer to the function */
 231                 return get_mode_size_bytes(mode_P_code);
 232         case TYPE_POINTER:
 233                 return get_mode_size_bytes(mode_P_data);
 234         case TYPE_ARRAY:
 235                 return get_array_type_size((array_type_t*) type);
 236         case TYPE_BUILTIN:
 237         case TYPE_TYPEDEF:
 238         case TYPE_TYPEOF:
 239         case TYPE_INVALID:
 240                 break;
 241         }
 242         panic("Trying to determine size of invalid type");
 243 }
 244
 245 static unsigned count_parameters(const function_type_t *function_type)
 246 {
 247         unsigned count = 0;
 248
 249         function_parameter_t *parameter = function_type->parameters;
 250         for ( ; parameter != NULL; parameter = parameter->next) {
 251                 ++count;
 252         }
 253
 254         return count;
 255 }
 256
 257
 258
 259
 260 static long fold_constant(const expression_t *expression);
 261
 262 static ir_type *create_atomic_type(const atomic_type_t *type)
 263 {
 264         ir_mode *mode   = get_atomic_mode(type);
 265         ident   *id     = get_mode_ident(mode);
 266         ir_type *irtype = new_type_primitive(id, mode);
 267
 268         return irtype;
 269 }
 270
 271 static ir_type *create_method_type(const function_type_t *function_type)
 272 {
 273         type_t  *result_type  = function_type->result_type;
 274
 275         ident   *id           = unique_ident("functiontype");
 276         int      n_parameters = count_parameters(function_type);
 277         int      n_results    = result_type == type_void ? 0 : 1;
 278         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 279
 280         if(result_type != type_void) {
 281                 ir_type *restype = get_ir_type(result_type);
 282                 set_method_res_type(irtype, 0, restype);
 283         }
 284
 285         function_parameter_t *parameter = function_type->parameters;
 286         int                   n         = 0;
 287         for( ; parameter != NULL; parameter = parameter->next) {
 288                 ir_type *p_irtype = get_ir_type(parameter->type);
 289                 set_method_param_type(irtype, n, p_irtype);
 290                 ++n;
 291         }
 292
 293         if(function_type->variadic || function_type->unspecified_parameters) {
 294                 set_method_variadicity(irtype, variadicity_variadic);
 295         }
 296
 297         return irtype;
 298 }
 299
 300 static ir_type *create_pointer_type(pointer_type_t *type)
 301 {
 302         type_t  *points_to = type->points_to;
 303         ir_type *ir_points_to;
 304         /* Avoid endless recursion if the points_to type contains this poiner type
 305          * again (might be a struct). We therefore first create a void* pointer
 306          * and then set the real points_to type
 307          */
 308         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 309                                             ir_type_void, mode_P_data);
 310         type->type.firm_type  = ir_type;
 311
 312         ir_points_to = get_ir_type(points_to);
 313         set_pointer_points_to_type(ir_type, ir_points_to);
 314
 315         return ir_type;
 316 }
 317
 318 static ir_type *create_array_type(array_type_t *type)
 319 {
 320         type_t  *element_type    = type->element_type;
 321         ir_type *ir_element_type = get_ir_type(element_type);
 322
 323         ident   *id      = unique_ident("array");
 324         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 325
 326         if(type->size != NULL) {
 327                 int n_elements = fold_constant(type->size);
 328
 329                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 330
 331                 size_t elemsize = get_type_size_bytes(ir_element_type);
 332                 int align = get_type_alignment_bytes(ir_element_type);
 333                 if(elemsize % align > 0) {
 334                         elemsize += align - (elemsize % align);
 335                 }
 336                 set_type_size_bytes(ir_type, n_elements * elemsize);
 337                 set_type_alignment_bytes(ir_type, align);
 338                 set_type_state(ir_type, layout_fixed);
 339         }
 340
 341         return ir_type;
 342 }
 343
 344 #define INVALID_TYPE ((ir_type_ptr)-1)
 345
 346 static ir_type *create_struct_type(compound_type_t *type)
 347 {
 348         symbol_t *symbol = type->declaration->symbol;
 349         ident    *id;
 350         if(symbol != NULL) {
 351                 id = unique_ident(symbol->string);
 352         } else {
 353                 id = unique_ident("__anonymous_struct");
 354         }
 355         ir_type *ir_type = new_type_struct(id);
 356
 357         type->type.firm_type = ir_type;
 358
 359         int align_all = 1;
 360         int offset    = 0;
 361         declaration_t *entry = type->declaration->context.declarations;
 362         for( ; entry != NULL; entry = entry->next) {
 363                 if(entry->namespace != NAMESPACE_NORMAL)
 364                         continue;
 365
 366                 ident       *ident         = new_id_from_str(entry->symbol->string);
 367                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 368
 369                 int entry_size      = get_type_size_bytes(entry_ir_type);
 370                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 371                 int misalign = offset % entry_alignment;
 372                 offset += misalign;
 373
 374                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 375                 set_entity_offset(entity, offset);
 376                 add_struct_member(ir_type, entity);
 377                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 378                 entry->v.entity         = entity;
 379
 380                 offset += entry_size;
 381                 if(entry_alignment > align_all) {
 382                         if(entry_alignment % align_all != 0) {
 383                                 panic("Uneven alignments not supported yet");
 384                         }
 385                         align_all = entry_alignment;
 386                 }
 387         }
 388
 389         int misalign = offset % align_all;
 390         offset += misalign;
 391         set_type_alignment_bytes(ir_type, align_all);
 392         set_type_size_bytes(ir_type, offset);
 393         set_type_state(ir_type, layout_fixed);
 394
 395         return ir_type;
 396 }
 397
 398 static ir_type *create_union_type(compound_type_t *type)
 399 {
 400         declaration_t *declaration = type->declaration;
 401         symbol_t      *symbol      = declaration->symbol;
 402         ident         *id;
 403         if(symbol != NULL) {
 404                 id = unique_ident(symbol->string);
 405         } else {
 406                 id = unique_ident("__anonymous_union");
 407         }
 408         ir_type  *ir_type = new_type_union(id);
 409
 410         type->type.firm_type = ir_type;
 411
 412         int align_all = 1;
 413         int size      = 0;
 414         declaration_t *entry = declaration->context.declarations;
 415         for( ; entry != NULL; entry = entry->next) {
 416                 if(entry->namespace != NAMESPACE_NORMAL)
 417                         continue;
 418
 419                 ident       *ident         = new_id_from_str(entry->symbol->string);
 420                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 421
 422                 int entry_size      = get_type_size_bytes(entry_ir_type);
 423                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 424
 425                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 426                 add_union_member(ir_type, entity);
 427                 set_entity_offset(entity, 0);
 428                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 429                 entry->v.entity         = entity;
 430
 431                 if(entry_size > size) {
 432                         size = entry_size;
 433                 }
 434                 if(entry_alignment > align_all) {
 435                         if(entry_alignment % align_all != 0) {
 436                                 panic("Uneven alignments not supported yet");
 437                         }
 438                         align_all = entry_alignment;
 439                 }
 440         }
 441
 442         set_type_alignment_bytes(ir_type, align_all);
 443         set_type_size_bytes(ir_type, size);
 444         set_type_state(ir_type, layout_fixed);
 445
 446         return ir_type;
 447 }
 448
 449 static ir_type *get_ir_type(type_t *type)
 450 {
 451         assert(type != NULL);
 452
 453         type = skip_typeref(type);
 454
 455         if(type->firm_type != NULL) {
 456                 assert(type->firm_type != INVALID_TYPE);
 457                 return type->firm_type;
 458         }
 459
 460         ir_type *firm_type = NULL;
 461         switch(type->type) {
 462         case TYPE_ATOMIC:
 463                 firm_type = create_atomic_type((atomic_type_t*) type);
 464                 break;
 465         case TYPE_FUNCTION:
 466                 firm_type = create_method_type((function_type_t*) type);
 467                 break;
 468         case TYPE_POINTER:
 469                 firm_type = create_pointer_type((pointer_type_t*) type);
 470                 break;
 471         case TYPE_ARRAY:
 472                 firm_type = create_array_type((array_type_t*) type);
 473                 break;
 474         case TYPE_COMPOUND_STRUCT:
 475                 firm_type = create_struct_type((compound_type_t*) type);
 476                 break;
 477         case TYPE_COMPOUND_UNION:
 478                 firm_type = create_union_type((compound_type_t*) type);
 479                 break;
 480         case TYPE_ENUM:
 481                 firm_type = ir_type_int;
 482                 break;
 483         case TYPE_BUILTIN:
 484         case TYPE_TYPEOF:
 485         case TYPE_TYPEDEF:
 486         case TYPE_INVALID:
 487                 break;
 488         }
 489         if(firm_type == NULL)
 490                 panic("unknown type found");
 491
 492         type->firm_type = firm_type;
 493         return firm_type;
 494 }
 495
 496 static inline ir_mode *get_ir_mode(type_t *type)
 497 {
 498         ir_type *irtype = get_ir_type(type);
 499
 500         /* firm doesn't report a mode for arrays somehow... */
 501         if(is_Array_type(irtype)) {
 502                 return mode_P;
 503         }
 504
 505         ir_mode *mode = get_type_mode(irtype);
 506         assert(mode != NULL);
 507         return mode;
 508 }
 509
 510 static ir_entity* get_function_entity(declaration_t *declaration)
 511 {
 512         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 513                 return declaration->v.entity;
 514         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 515
 516         symbol_t *symbol = declaration->symbol;
 517         ident    *id     = new_id_from_str(symbol->string);
 518
 519         ir_type  *global_type    = get_glob_type();
 520         ir_type  *ir_type_method = get_ir_type(declaration->type);
 521         assert(is_Method_type(ir_type_method));
 522
 523         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 524         set_entity_ld_ident(entity, id);
 525         if(declaration->storage_class == STORAGE_CLASS_STATIC
 526                         || declaration->is_inline) {
 527                 set_entity_visibility(entity, visibility_local);
 528         } else if(declaration->init.statement != NULL) {
 529                 set_entity_visibility(entity, visibility_external_visible);
 530         } else {
 531                 set_entity_visibility(entity, visibility_external_allocated);
 532         }
 533
 534         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 535         declaration->v.entity         = entity;
 536
 537         return entity;
 538 }
 539
 540
 541
 542 static ir_node *expression_to_firm(const expression_t *expression);
 543
 544 static dbg_info *get_dbg_info(const source_position_t *pos)
 545 {
 546         return (dbg_info*) pos;
 547 }
 548
 549 static ir_node *const_to_firm(const const_t *cnst)
 550 {
 551         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 552         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 553
 554         tarval   *tv;
 555         if(mode_is_float(mode)) {
 556                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 557         } else {
 558                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 559         }
 560
 561         return new_d_Const(dbgi, mode, tv);
 562 }
 563
 564 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 565 {
 566         assert(entity != NULL);
 567         union symconst_symbol sym;
 568         sym.entity_p = entity;
 569         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 570 }
 571
 572 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 573 {
 574         ir_type   *global_type = get_glob_type();
 575         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 576                                                 ir_type_const_char);
 577
 578         ident     *id     = unique_ident("Lstr");
 579         ir_entity *entity = new_entity(global_type, id, type);
 580         set_entity_ld_ident(entity, id);
 581         set_entity_variability(entity, variability_constant);
 582
 583         ir_type    *elem_type = ir_type_const_char;
 584         ir_mode    *mode      = get_type_mode(elem_type);
 585
 586         const char *string = literal->value;
 587         size_t      slen   = strlen(string) + 1;
 588
 589         set_array_lower_bound_int(type, 0, 0);
 590         set_array_upper_bound_int(type, 0, slen);
 591         set_type_size_bytes(type, slen);
 592         set_type_state(type, layout_fixed);
 593
 594         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 595         for(size_t i = 0; i < slen; ++i) {
 596                 tvs[i] = new_tarval_from_long(string[i], mode);
 597         }
 598
 599         set_array_entity_values(entity, tvs, slen);
 600         free(tvs);
 601
 602         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 603
 604         return create_symconst(dbgi, entity);
 605 }
 606
 607 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 608                                           dbg_info *dbgi)
 609 {
 610         ir_mode *mode     = get_ir_mode(type);
 611         ir_node *memory   = get_store();
 612         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 613         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 614         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 615         set_store(load_mem);
 616
 617         return load_res;
 618 }
 619
 620 static ir_node *deref_address(type_t *const type, ir_node *const addr,
 621                               dbg_info *const dbgi)
 622 {
 623         switch (type->type) {
 624                 case TYPE_ARRAY:
 625                 case TYPE_COMPOUND_STRUCT:
 626                 case TYPE_COMPOUND_UNION:
 627                         return addr;
 628
 629                 default:
 630                         return load_from_expression_addr(type, addr, dbgi);
 631         }
 632 }
 633
 634 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 635 {
 636         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 637         declaration_t *declaration = ref->declaration;
 638         type_t        *type        = skip_typeref(declaration->type);
 639
 640         switch((declaration_type_t) declaration->declaration_type) {
 641         case DECLARATION_TYPE_UNKNOWN:
 642                 break;
 643         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 644                 ir_mode *mode = get_ir_mode(type);
 645                 return get_value(declaration->v.value_number, mode);
 646         }
 647         case DECLARATION_TYPE_FUNCTION: {
 648                 return create_symconst(dbgi, declaration->v.entity);
 649         }
 650         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 651                 ir_entity *entity   = declaration->v.entity;
 652                 ir_node   *symconst = create_symconst(dbgi, entity);
 653                 return deref_address(type, symconst, dbgi);
 654         }
 655         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 656                 ir_entity *entity = declaration->v.entity;
 657                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 658                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 659                 return deref_address(type, sel, dbgi);
 660         }
 661
 662         case DECLARATION_TYPE_COMPOUND_MEMBER:
 663         case DECLARATION_TYPE_LABEL_BLOCK:
 664                 panic("not implemented reference type");
 665         }
 666
 667         panic("reference to declaration with unknown type found");
 668 }
 669
 670 static ir_node *reference_addr(const reference_expression_t *ref)
 671 {
 672         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 673         declaration_t *declaration = ref->declaration;
 674
 675         switch((declaration_type_t) declaration->declaration_type) {
 676         case DECLARATION_TYPE_UNKNOWN:
 677                 break;
 678         case DECLARATION_TYPE_LOCAL_VARIABLE:
 679                 panic("local variable without entity has no address");
 680         case DECLARATION_TYPE_FUNCTION: {
 681                 return create_symconst(dbgi, declaration->v.entity);
 682         }
 683         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 684                 ir_entity *entity   = declaration->v.entity;
 685                 ir_node   *symconst = create_symconst(dbgi, entity);
 686                 return symconst;
 687         }
 688         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 689                 ir_entity *entity = declaration->v.entity;
 690                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 691                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 692
 693                 return sel;
 694         }
 695         case DECLARATION_TYPE_COMPOUND_MEMBER:
 696         case DECLARATION_TYPE_LABEL_BLOCK:
 697                 panic("not implemented reference type");
 698         }
 699
 700         panic("reference to declaration with unknown type found");
 701 }
 702
 703 static ir_node *call_expression_to_firm(const call_expression_t *call)
 704 {
 705         assert(get_cur_block() != NULL);
 706
 707         expression_t  *function = call->function;
 708         ir_node       *callee   = expression_to_firm(function);
 709
 710         assert(function->datatype->type == TYPE_FUNCTION);
 711         function_type_t *function_type = (function_type_t*) function->datatype;
 712
 713         int              n_parameters = 0;
 714         call_argument_t *argument     = call->arguments;
 715         for( ; argument != NULL; argument = argument->next) {
 716                 ++n_parameters;
 717         }
 718
 719         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 720         ir_type *new_method_type = NULL;
 721         if(function_type->variadic || function_type->unspecified_parameters) {
 722                 /* we need to construct a new method type matching the call
 723                  * arguments... */
 724                 int n_res       = get_method_n_ress(ir_method_type);
 725                 new_method_type = new_type_method(unique_ident("calltype"),
 726                                                   n_parameters, n_res);
 727                 set_method_calling_convention(new_method_type,
 728                                get_method_calling_convention(ir_method_type));
 729                 set_method_additional_properties(new_method_type,
 730                                get_method_additional_properties(ir_method_type));
 731
 732                 for(int i = 0; i < n_res; ++i) {
 733                         set_method_res_type(new_method_type, i,
 734                                             get_method_res_type(ir_method_type, i));
 735                 }
 736         }
 737         ir_node *in[n_parameters];
 738
 739         argument = call->arguments;
 740         int n = 0;
 741         for( ; argument != NULL; argument = argument->next) {
 742                 expression_t *expression = argument->expression;
 743                 ir_node      *arg_node   = expression_to_firm(expression);
 744
 745                 in[n] = arg_node;
 746                 if(new_method_type != NULL) {
 747                         ir_type *irtype = get_ir_type(expression->datatype);
 748                         set_method_param_type(new_method_type, n, irtype);
 749                 }
 750
 751                 n++;
 752         }
 753         assert(n == n_parameters);
 754
 755         if(new_method_type != NULL)
 756                 ir_method_type = new_method_type;
 757
 758         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 759         ir_node  *store = get_store();
 760         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 761                                      ir_method_type);
 762         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 763         set_store(mem);
 764
 765         type_t  *result_type = function_type->result_type;
 766         ir_node *result      = NULL;
 767         if(result_type != type_void) {
 768                 ir_mode *mode    = get_ir_mode(result_type);
 769                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 770                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 771         }
 772
 773         return result;
 774 }
 775
 776 static ir_node *expression_to_addr(const expression_t *expression);
 777 static void create_condition_evaluation(const expression_t *expression,
 778                                         ir_node *true_block,
 779                                         ir_node *false_block);
 780
 781 static void set_value_for_expression(const expression_t *expression,
 782                                      ir_node *value)
 783 {
 784         if(expression->type == EXPR_REFERENCE) {
 785                 reference_expression_t *ref = (reference_expression_t*) expression;
 786
 787                 declaration_t *declaration = ref->declaration;
 788                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 789                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 790                         set_value(declaration->v.value_number, value);
 791                         return;
 792                 }
 793         }
 794
 795         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 796         ir_node  *addr      = expression_to_addr(expression);
 797         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 798         ir_node  *memory    = get_store();
 799         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 800         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 801         set_store(store_mem);
 802 }
 803
 804 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 805 {
 806         ir_mode *value_mode = get_irn_mode(value);
 807
 808         if(value_mode == dest_mode)
 809                 return value;
 810
 811         if(dest_mode == mode_b) {
 812                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 813                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 814                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 815                 return proj;
 816         }
 817
 818         return new_d_Conv(dbgi, value, dest_mode);
 819 }
 820
 821 static ir_node *create_incdec(const unary_expression_t *expression)
 822 {
 823         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 824         type_t       *type  = expression->expression.datatype;
 825         ir_mode      *mode  = get_ir_mode(type);
 826         expression_t *value = expression->value;
 827
 828         ir_node *value_node = expression_to_firm(value);
 829
 830         ir_node *offset;
 831         if(type->type == TYPE_POINTER) {
 832                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 833                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 834                 offset = new_Const_long(mode_Is, elem_size);
 835         } else {
 836                 assert(is_type_arithmetic(type));
 837                 offset = new_Const(mode, get_mode_one(mode));
 838         }
 839
 840         ir_node *new_value;
 841         switch(expression->type) {
 842         case UNEXPR_POSTFIX_INCREMENT: {
 843                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 844                 set_value_for_expression(value, new_value);
 845                 return value_node;
 846         }
 847         case UNEXPR_POSTFIX_DECREMENT: {
 848                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 849                 set_value_for_expression(value, new_value);
 850                 return value_node;
 851         }
 852         case UNEXPR_PREFIX_INCREMENT: {
 853                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 854                 set_value_for_expression(value, new_value);
 855                 return new_value;
 856         }
 857         case UNEXPR_PREFIX_DECREMENT: {
 858                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 859                 set_value_for_expression(value, new_value);
 860                 return new_value;
 861         }
 862         default:
 863                 panic("no incdec expr in create_incdec");
 864         }
 865
 866         return new_value;
 867 }
 868
 869 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 870 {
 871         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 872         type_t   *type = expression->expression.datatype;
 873
 874         if(expression->type == UNEXPR_TAKE_ADDRESS)
 875                 return expression_to_addr(expression->value);
 876
 877         const expression_t *value      = expression->value;
 878         ir_node            *value_node = expression_to_firm(value);
 879
 880         switch(expression->type) {
 881         case UNEXPR_NEGATE:
 882                 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
 883         case UNEXPR_PLUS:
 884                 return value_node;
 885         case UNEXPR_BITWISE_NEGATE:
 886                 return new_d_Not(dbgi, value_node, get_ir_mode(type));
 887         case UNEXPR_NOT: {
 888                 if(get_irn_mode(value_node) != mode_b) {
 889                         value_node = create_conv(dbgi, value_node, mode_b);
 890                 }
 891                 value_node = new_d_Not(dbgi, value_node, mode_b);
 892                 ir_mode *const mode = get_ir_mode(type);
 893                 if(mode != mode_b) {
 894                         value_node = create_conv(dbgi, value_node, mode);
 895                 }
 896                 return value_node;
 897         }
 898         case UNEXPR_DEREFERENCE:
 899                 return deref_address(type, value_node, dbgi);
 900         case UNEXPR_POSTFIX_INCREMENT:
 901         case UNEXPR_POSTFIX_DECREMENT:
 902         case UNEXPR_PREFIX_INCREMENT:
 903         case UNEXPR_PREFIX_DECREMENT:
 904                 return create_incdec(expression);
 905         case UNEXPR_CAST:
 906                 return create_conv(dbgi, value_node, get_ir_mode(type));
 907
 908         case UNEXPR_TAKE_ADDRESS:
 909         case UNEXPR_INVALID:
 910                 break;
 911         }
 912         panic("invalid UNEXPR type found");
 913 }
 914
 915 static long get_pnc(binary_expression_type_t type)
 916 {
 917         switch(type) {
 918         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 919         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 920         case BINEXPR_LESS:         return pn_Cmp_Lt;
 921         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 922         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 923         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 924         default:
 925                 break;
 926         }
 927         panic("trying to get pn_Cmp from non-comparison binexpr type");
 928 }
 929
 930 static ir_node *create_lazy_op(const binary_expression_t *expression)
 931 {
 932         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 933         type_t   *type = expression->expression.datatype;
 934         ir_mode  *mode = get_ir_mode(type);
 935
 936         ir_node *cur_block = get_cur_block();
 937
 938         ir_node *one_block = new_immBlock();
 939         ir_node *one       = new_Const(mode, get_mode_one(mode));
 940         ir_node *jmp_one   = new_d_Jmp(dbgi);
 941
 942         ir_node *zero_block = new_immBlock();
 943         ir_node *zero       = new_Const(mode, get_mode_null(mode));
 944         ir_node *jmp_zero   = new_d_Jmp(dbgi);
 945
 946         set_cur_block(cur_block);
 947         create_condition_evaluation((const expression_t*) expression,
 948                                     one_block, zero_block);
 949         mature_immBlock(one_block);
 950         mature_immBlock(zero_block);
 951
 952         ir_node *common_block = new_immBlock();
 953         add_immBlock_pred(common_block, jmp_one);
 954         add_immBlock_pred(common_block, jmp_zero);
 955         mature_immBlock(common_block);
 956
 957         ir_node *in[2] = { one, zero };
 958         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
 959
 960         return val;
 961 }
 962
 963 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 964                                             ir_node *right, ir_mode *mode);
 965
 966 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 967                                         create_arithmetic_func func)
 968 {
 969         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 970         ir_node  *left  = expression_to_firm(expression->left);
 971         ir_node  *right = expression_to_firm(expression->right);
 972         type_t   *type  = expression->right->datatype;
 973         /* be careful with the modes, because in asithmetic assign nodes only
 974          * the right operand has the mode of the arithmetic alread */
 975         ir_mode  *mode  = get_ir_mode(type);
 976         left            = create_conv(dbgi, left, mode);
 977         ir_node  *res   = func(dbgi, left, right, mode);
 978
 979         return res;
 980 }
 981
 982 static ir_node *create_arithmetic_assign_binop(
 983                 const binary_expression_t *expression, create_arithmetic_func func)
 984 {
 985         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 986         ir_node  *value = create_arithmetic_binop(expression, func);
 987         type_t   *type  = expression->expression.datatype;
 988         ir_mode  *mode  = get_ir_mode(type);
 989
 990         assert(type->type != TYPE_POINTER);
 991
 992         value = create_conv(dbgi, value, mode);
 993         set_value_for_expression(expression->left, value);
 994
 995         return value;
 996 }
 997
 998 static ir_node *create_add(const binary_expression_t *expression)
 999 {
1000         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1001         ir_node  *left  = expression_to_firm(expression->left);
1002         ir_node  *right = expression_to_firm(expression->right);
1003         type_t   *type  = expression->expression.datatype;
1004         ir_mode  *mode  = get_ir_mode(type);
1005
1006         expression_t *expr_left  = expression->left;
1007         expression_t *expr_right = expression->right;
1008         type_t       *type_left  = skip_typeref(expr_left->datatype);
1009         type_t       *type_right = skip_typeref(expr_right->datatype);
1010
1011         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1012                 return new_d_Add(dbgi, left, right, mode);
1013         }
1014
1015         ir_node        *pointer;
1016         ir_node        *integer;
1017         pointer_type_t *pointer_type;
1018         if(type_left->type == TYPE_POINTER) {
1019                 pointer      = left;
1020                 integer      = right;
1021                 pointer_type = (pointer_type_t*) type_left;
1022         } else {
1023                 assert(type_right->type == TYPE_POINTER);
1024                 pointer      = right;
1025                 integer      = left;
1026                 pointer_type = (pointer_type_t*) type_right;
1027         }
1028
1029         type_t   *points_to = pointer_type->points_to;
1030         unsigned  elem_size = get_type_size(points_to);
1031
1032         assert(elem_size >= 1);
1033         if(elem_size > 1) {
1034                 integer       = create_conv(dbgi, integer, mode_Is);
1035                 ir_node *cnst = new_Const_long(mode_Is, (int) elem_size);
1036                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1037                 integer = mul;
1038         }
1039
1040         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
1041
1042         return res;
1043 }
1044
1045 static ir_node *create_sub(const binary_expression_t *expression)
1046 {
1047         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1048         ir_node  *left  = expression_to_firm(expression->left);
1049         ir_node  *right = expression_to_firm(expression->right);
1050         type_t   *type  = expression->expression.datatype;
1051         ir_mode  *mode  = get_ir_mode(type);
1052
1053         expression_t *expr_left  = expression->left;
1054         expression_t *expr_right = expression->right;
1055         type_t       *type_left  = skip_typeref(expr_left->datatype);
1056         type_t       *type_right = skip_typeref(expr_right->datatype);
1057
1058         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
1059                         || (type_left->type == TYPE_POINTER
1060                                 && type_right->type == TYPE_POINTER)) {
1061                 return new_d_Sub(dbgi, left, right, mode);
1062         }
1063
1064         assert(type_right->type == TYPE_POINTER);
1065         ir_node        *pointer      = left;
1066         ir_node        *integer      = right;
1067         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
1068
1069         type_t   *points_to = pointer_type->points_to;
1070         unsigned  elem_size = get_type_size(points_to);
1071
1072         assert(elem_size >= 1);
1073         if(elem_size > 1) {
1074                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
1075                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
1076                 integer = mul;
1077         }
1078
1079         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
1080
1081         return res;
1082 }
1083
1084 static ir_node *create_shift(const binary_expression_t *expression)
1085 {
1086         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1087         ir_node  *left  = expression_to_firm(expression->left);
1088         ir_node  *right = expression_to_firm(expression->right);
1089         type_t   *type  = expression->expression.datatype;
1090         ir_mode  *mode  = get_ir_mode(type);
1091
1092         /* firm always wants the shift count to be unsigned */
1093         right = create_conv(dbgi, right, mode_Iu);
1094
1095         ir_node *res;
1096
1097         switch(expression->type) {
1098         case BINEXPR_SHIFTLEFT:
1099                 res = new_d_Shl(dbgi, left, right, mode);
1100                 break;
1101         case BINEXPR_SHIFTRIGHT: {
1102                  expression_t *expr_left = expression->left;
1103                  type_t       *type_left = skip_typeref(expr_left->datatype);
1104
1105                  if(is_type_signed(type_left)) {
1106                         res = new_d_Shrs(dbgi, left, right, mode);
1107                  } else {
1108                          res = new_d_Shr(dbgi, left, right, mode);
1109                  }
1110                  break;
1111         }
1112         default:
1113                 panic("create shift op called for non-shift op");
1114         }
1115
1116         return res;
1117 }
1118
1119
1120 static ir_node *create_divmod(const binary_expression_t *expression)
1121 {
1122         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1123         ir_node  *left  = expression_to_firm(expression->left);
1124         ir_node  *right = expression_to_firm(expression->right);
1125         ir_node  *pin   = new_Pin(new_NoMem());
1126         type_t   *type  = expression->expression.datatype;
1127         ir_mode  *mode  = get_ir_mode(type);
1128         ir_node  *op;
1129         ir_node  *res;
1130
1131         switch (expression->type)  {
1132                 case BINEXPR_DIV:
1133                 case BINEXPR_DIV_ASSIGN:
1134                         if(mode_is_float(mode)) {
1135                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1136                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1137                         } else {
1138                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1139                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1140                         }
1141                         break;
1142
1143                 case BINEXPR_MOD:
1144                 case BINEXPR_MOD_ASSIGN:
1145                         assert(!mode_is_float(mode));
1146                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1147                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1148                         break;
1149
1150                 default: panic("unexpected binary expression type in create_divmod()");
1151         }
1152
1153         return res;
1154 }
1155
1156 static ir_node *create_arithmetic_assign_divmod(
1157                 const binary_expression_t *expression)
1158 {
1159         ir_node  *      value = create_divmod(expression);
1160         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1161         type_t   *const type  = expression->expression.datatype;
1162         ir_mode  *const mode  = get_ir_mode(type);
1163
1164         assert(type->type != TYPE_POINTER);
1165
1166         value = create_conv(dbgi, value, mode);
1167         set_value_for_expression(expression->left, value);
1168
1169         return value;
1170 }
1171
1172
1173 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1174 {
1175         binary_expression_type_t type = expression->type;
1176         switch(type) {
1177         case BINEXPR_EQUAL:
1178         case BINEXPR_NOTEQUAL:
1179         case BINEXPR_LESS:
1180         case BINEXPR_LESSEQUAL:
1181         case BINEXPR_GREATER:
1182         case BINEXPR_GREATEREQUAL: {
1183                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1184                 ir_node *left  = expression_to_firm(expression->left);
1185                 ir_node *right = expression_to_firm(expression->right);
1186                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1187                 long     pnc   = get_pnc(type);
1188                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1189                 return proj;
1190         }
1191         case BINEXPR_ASSIGN: {
1192                 ir_node *right = expression_to_firm(expression->right);
1193                 set_value_for_expression(expression->left, right);
1194                 return right;
1195         }
1196         case BINEXPR_ADD:
1197                 return create_add(expression);
1198         case BINEXPR_SUB:
1199                 return create_sub(expression);
1200         case BINEXPR_MUL:
1201                 return create_arithmetic_binop(expression, new_d_Mul);
1202         case BINEXPR_BITWISE_AND:
1203                 return create_arithmetic_binop(expression, new_d_And);
1204         case BINEXPR_BITWISE_OR:
1205                 return create_arithmetic_binop(expression, new_d_Or);
1206         case BINEXPR_BITWISE_XOR:
1207                 return create_arithmetic_binop(expression, new_d_Eor);
1208         case BINEXPR_SHIFTLEFT:
1209         case BINEXPR_SHIFTRIGHT:
1210                 return create_shift(expression);
1211         case BINEXPR_DIV:
1212         case BINEXPR_MOD:
1213                 return create_divmod(expression);
1214         case BINEXPR_LOGICAL_AND:
1215         case BINEXPR_LOGICAL_OR:
1216                 return create_lazy_op(expression);
1217         case BINEXPR_COMMA:
1218                 expression_to_firm(expression->left);
1219                 return expression_to_firm(expression->right);
1220         case BINEXPR_ADD_ASSIGN:
1221                 return create_arithmetic_assign_binop(expression, new_d_Add);
1222         case BINEXPR_SUB_ASSIGN:
1223                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1224         case BINEXPR_MUL_ASSIGN:
1225                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1226         case BINEXPR_DIV_ASSIGN:
1227                 return create_arithmetic_assign_divmod(expression);
1228         case BINEXPR_BITWISE_AND_ASSIGN:
1229                 return create_arithmetic_assign_binop(expression, new_d_And);
1230         case BINEXPR_BITWISE_OR_ASSIGN:
1231                 return create_arithmetic_assign_binop(expression, new_d_Or);
1232         case BINEXPR_BITWISE_XOR_ASSIGN:
1233                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1234         case BINEXPR_SHIFTLEFT_ASSIGN:
1235                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1236         case BINEXPR_SHIFTRIGHT_ASSIGN:
1237                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1238         default:
1239                 panic("TODO binexpr type");
1240         }
1241 }
1242
1243 static ir_node *array_access_addr(const array_access_expression_t *expression)
1244 {
1245         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1246
1247         ir_node *base_addr = expression_to_firm(expression->array_ref);
1248         ir_node *offset    = expression_to_firm(expression->index);
1249         offset             = create_conv(dbgi, offset, mode_Iu);
1250
1251         unsigned elem_size       = get_type_size(expression->expression.datatype);
1252         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1253         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1254                                              mode_Iu);
1255         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1256
1257         return result;
1258 }
1259
1260 static ir_node *array_access_to_firm(
1261                 const array_access_expression_t *expression)
1262 {
1263         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1264         ir_node  *addr = array_access_addr(expression);
1265         type_t   *type = expression->expression.datatype;
1266         return deref_address(type, addr, dbgi);
1267 }
1268
1269 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1270 {
1271         type_t *type = expression->type;
1272         if(type == NULL) {
1273                 type = expression->size_expression->datatype;
1274                 assert(type != NULL);
1275         }
1276
1277         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1278         unsigned  size      = get_type_size(type);
1279         ir_node  *size_node = new_Const_long(mode, size);
1280
1281         return size_node;
1282 }
1283
1284 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1285 {
1286         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1287
1288         ir_node *cur_block   = get_cur_block();
1289
1290         /* create the true block */
1291         ir_node *true_block  = new_immBlock();
1292
1293         ir_node *true_val = expression_to_firm(expression->true_expression);
1294         ir_node *true_jmp = new_Jmp();
1295
1296         /* create the false block */
1297         ir_node *false_block = new_immBlock();
1298
1299         ir_node *false_val = expression_to_firm(expression->false_expression);
1300         ir_node *false_jmp = new_Jmp();
1301
1302         /* create the condition evaluation */
1303         set_cur_block(cur_block);
1304         create_condition_evaluation(expression->condition, true_block, false_block);
1305         mature_immBlock(true_block);
1306         mature_immBlock(false_block);
1307
1308         /* create the common block */
1309         ir_node *common_block = new_immBlock();
1310         add_immBlock_pred(common_block, true_jmp);
1311         add_immBlock_pred(common_block, false_jmp);
1312         mature_immBlock(common_block);
1313
1314         ir_node *in[2] = { true_val, false_val };
1315         ir_mode *mode  = get_irn_mode(true_val);
1316         assert(get_irn_mode(false_val) == mode);
1317         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1318
1319         return val;
1320 }
1321
1322 static ir_node *select_addr(const select_expression_t *expression)
1323 {
1324         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1325
1326         ir_node *compound_addr = expression_to_firm(expression->compound);
1327
1328         declaration_t *entry = expression->compound_entry;
1329         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1330         ir_entity     *entity = entry->v.entity;
1331
1332         assert(entity != NULL);
1333
1334         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1335
1336         return sel;
1337 }
1338
1339 static ir_node *select_to_firm(const select_expression_t *expression)
1340 {
1341         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1342         ir_node  *addr = select_addr(expression);
1343         type_t   *type = expression->expression.datatype;
1344         return deref_address(type, addr, dbgi);
1345 }
1346
1347 static ir_node *dereference_addr(const unary_expression_t *const expression)
1348 {
1349         assert(expression->type == UNEXPR_DEREFERENCE);
1350         return expression_to_firm(expression->value);
1351 }
1352
1353 static ir_node *expression_to_addr(const expression_t *expression)
1354 {
1355         switch(expression->type) {
1356         case EXPR_REFERENCE:
1357                 return reference_addr((const reference_expression_t*) expression);
1358         case EXPR_ARRAY_ACCESS:
1359                 return array_access_addr((const array_access_expression_t*) expression);
1360         case EXPR_SELECT:
1361                 return select_addr((const select_expression_t*) expression);
1362         case EXPR_UNARY: {
1363                 const unary_expression_t *const unary_expr =
1364                         (const unary_expression_t*)expression;
1365                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1366                         return dereference_addr(unary_expr);
1367                 }
1368                 break;
1369         }
1370         default:
1371                 break;
1372         }
1373         panic("trying to get address of non-lvalue");
1374 }
1375
1376 static ir_node *_expression_to_firm(const expression_t *expression)
1377 {
1378         switch(expression->type) {
1379         case EXPR_CONST:
1380                 return const_to_firm((const const_t*) expression);
1381         case EXPR_STRING_LITERAL:
1382                 return string_literal_to_firm((const string_literal_t*) expression);
1383         case EXPR_REFERENCE:
1384                 return reference_expression_to_firm(
1385                                 (const reference_expression_t*) expression);
1386         case EXPR_CALL:
1387                 return call_expression_to_firm((const call_expression_t*) expression);
1388         case EXPR_UNARY:
1389                 return unary_expression_to_firm((const unary_expression_t*) expression);
1390         case EXPR_BINARY:
1391                 return binary_expression_to_firm(
1392                                 (const binary_expression_t*) expression);
1393         case EXPR_ARRAY_ACCESS:
1394                 return array_access_to_firm(
1395                                 (const array_access_expression_t*) expression);
1396         case EXPR_SIZEOF:
1397                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1398         case EXPR_CONDITIONAL:
1399                 return conditional_to_firm((const conditional_expression_t*)expression);
1400         case EXPR_SELECT:
1401                 return select_to_firm((const select_expression_t*) expression);
1402         case EXPR_FUNCTION:
1403         case EXPR_OFFSETOF:
1404         case EXPR_PRETTY_FUNCTION:
1405         case EXPR_VA_ARG:
1406         case EXPR_STATEMENT:
1407         case EXPR_BUILTIN_SYMBOL:
1408                 panic("unimplemented expression found");
1409
1410         case EXPR_UNKNOWN:
1411         case EXPR_INVALID:
1412                 break;
1413         }
1414         panic("invalid expression found");
1415 }
1416
1417 static ir_node *expression_to_firm(const expression_t *expression)
1418 {
1419         ir_node *res = _expression_to_firm(expression);
1420
1421         if(res != NULL && get_irn_mode(res) == mode_b) {
1422                 ir_mode *mode = get_ir_mode(expression->datatype);
1423                 res           = create_conv(NULL, res, mode);
1424         }
1425
1426         return res;
1427 }
1428
1429 static ir_node *expression_to_modeb(const expression_t *expression)
1430 {
1431         ir_node *res = _expression_to_firm(expression);
1432         res          = create_conv(NULL, res, mode_b);
1433
1434         return res;
1435 }
1436
1437 /**
1438  * create a short-circuit expression evaluation that tries to construct
1439  * efficient control flow structures for &&, || and ! expressions
1440  */
1441 static void create_condition_evaluation(const expression_t *expression,
1442                                         ir_node *true_block,
1443                                         ir_node *false_block)
1444 {
1445         switch(expression->type) {
1446         case EXPR_UNARY: {
1447                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1448                 if(unary_expression->type == UNEXPR_NOT) {
1449                         create_condition_evaluation(unary_expression->value, false_block,
1450                                                     true_block);
1451                         return;
1452                 }
1453                 break;
1454         }
1455         case EXPR_BINARY: {
1456                 binary_expression_t *binary_expression
1457                         = (binary_expression_t*) expression;
1458                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1459                         ir_node *cur_block   = get_cur_block();
1460                         ir_node *extra_block = new_immBlock();
1461                         set_cur_block(cur_block);
1462                         create_condition_evaluation(binary_expression->left, extra_block,
1463                                                     false_block);
1464                         mature_immBlock(extra_block);
1465                         set_cur_block(extra_block);
1466                         create_condition_evaluation(binary_expression->right, true_block,
1467                                                     false_block);
1468                         return;
1469                 }
1470                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1471                         ir_node *cur_block   = get_cur_block();
1472                         ir_node *extra_block = new_immBlock();
1473                         set_cur_block(cur_block);
1474                         create_condition_evaluation(binary_expression->left, true_block,
1475                                                     extra_block);
1476                         mature_immBlock(extra_block);
1477                         set_cur_block(extra_block);
1478                         create_condition_evaluation(binary_expression->right, true_block,
1479                                                     false_block);
1480                         return;
1481                 }
1482                 break;
1483         }
1484         default:
1485                 break;
1486         }
1487
1488         dbg_info *dbgi       = get_dbg_info(&expression->source_position);
1489         ir_node  *condition  = expression_to_modeb(expression);
1490         ir_node  *cond       = new_d_Cond(dbgi, condition);
1491         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1492         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1493
1494         add_immBlock_pred(true_block, true_proj);
1495         add_immBlock_pred(false_block, false_proj);
1496
1497         set_cur_block(NULL);
1498 }
1499
1500 static void statement_to_firm(statement_t *statement);
1501
1502 static void return_statement_to_firm(return_statement_t *statement)
1503 {
1504         if(get_cur_block() == NULL)
1505                 return;
1506
1507         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1508         ir_node  *ret;
1509
1510         if(statement->return_value != NULL) {
1511                 ir_node *retval = expression_to_firm(statement->return_value);
1512                 ir_node *in[1];
1513
1514                 in[0] = retval;
1515                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1516         } else {
1517                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1518         }
1519         ir_node *end_block = get_irg_end_block(current_ir_graph);
1520         add_immBlock_pred(end_block, ret);
1521
1522         set_cur_block(NULL);
1523 }
1524
1525 static void compound_statement_to_firm(compound_statement_t *compound)
1526 {
1527         statement_t *statement = compound->statements;
1528         for( ; statement != NULL; statement = statement->next) {
1529                 //context2firm(&statement->context);
1530                 statement_to_firm(statement);
1531         }
1532 }
1533
1534 static void expression_statement_to_firm(expression_statement_t *statement)
1535 {
1536         if(get_cur_block() == NULL)
1537                 return;
1538
1539         expression_to_firm(statement->expression);
1540 }
1541
1542 static void if_statement_to_firm(if_statement_t *statement)
1543 {
1544         ir_node *cur_block = get_cur_block();
1545
1546         ir_node *fallthrough_block = new_immBlock();
1547
1548         /* the true (blocks) */
1549         ir_node *true_block = new_immBlock();
1550
1551         statement_to_firm(statement->true_statement);
1552         if(get_cur_block() != NULL) {
1553                 ir_node *jmp = new_Jmp();
1554                 add_immBlock_pred(fallthrough_block, jmp);
1555         }
1556
1557         /* the false (blocks) */
1558         ir_node *false_block;
1559         if(statement->false_statement != NULL) {
1560                 false_block = new_immBlock();
1561
1562                 statement_to_firm(statement->false_statement);
1563                 if(get_cur_block() != NULL) {
1564                         ir_node *jmp = new_Jmp();
1565                         add_immBlock_pred(fallthrough_block, jmp);
1566                 }
1567         } else {
1568                 false_block = fallthrough_block;
1569         }
1570
1571         /* create the condition */
1572         if(cur_block != NULL) {
1573                 set_cur_block(cur_block);
1574                 create_condition_evaluation(statement->condition, true_block,
1575                                             false_block);
1576         }
1577
1578         mature_immBlock(true_block);
1579         if(false_block != fallthrough_block) {
1580                 mature_immBlock(false_block);
1581         }
1582         mature_immBlock(fallthrough_block);
1583
1584         set_cur_block(fallthrough_block);
1585 }
1586
1587 static void while_statement_to_firm(while_statement_t *statement)
1588 {
1589         ir_node *jmp = NULL;
1590         if(get_cur_block() != NULL) {
1591                 jmp = new_Jmp();
1592         }
1593
1594         /* create the header block */
1595         ir_node *header_block = new_immBlock();
1596         if(jmp != NULL) {
1597                 add_immBlock_pred(header_block, jmp);
1598         }
1599
1600         /* the false block */
1601         ir_node *false_block = new_immBlock();
1602
1603         /* the loop body */
1604         ir_node *body_block = new_immBlock();
1605
1606         ir_node *old_continue_label = continue_label;
1607         ir_node *old_break_label    = break_label;
1608         continue_label              = header_block;
1609         break_label                 = false_block;
1610
1611         statement_to_firm(statement->body);
1612
1613         assert(continue_label == header_block);
1614         assert(break_label    == false_block);
1615         continue_label = old_continue_label;
1616         break_label    = old_break_label;
1617
1618         if(get_cur_block() != NULL) {
1619                 ir_node *jmp = new_Jmp();
1620                 add_immBlock_pred(header_block, jmp);
1621         }
1622
1623         /* create the condition */
1624         set_cur_block(header_block);
1625
1626         create_condition_evaluation(statement->condition, body_block, false_block);
1627         mature_immBlock(body_block);
1628         mature_immBlock(false_block);
1629         mature_immBlock(header_block);
1630
1631         set_cur_block(false_block);
1632 }
1633
1634 static void do_while_statement_to_firm(do_while_statement_t *statement)
1635 {
1636         ir_node *jmp = NULL;
1637         if(get_cur_block() != NULL) {
1638                 jmp = new_Jmp();
1639         }
1640
1641         /* create the header block */
1642         ir_node *header_block = new_immBlock();
1643
1644         /* the false block */
1645         ir_node *false_block = new_immBlock();
1646
1647         /* the loop body */
1648         ir_node *body_block = new_immBlock();
1649         if(jmp != NULL) {
1650                 add_immBlock_pred(body_block, jmp);
1651         }
1652
1653         ir_node *old_continue_label = continue_label;
1654         ir_node *old_break_label    = break_label;
1655         continue_label              = header_block;
1656         break_label                 = false_block;
1657
1658         statement_to_firm(statement->body);
1659
1660         assert(continue_label == header_block);
1661         assert(break_label    == false_block);
1662         continue_label = old_continue_label;
1663         break_label    = old_break_label;
1664
1665         if(get_cur_block() == NULL) {
1666                 mature_immBlock(header_block);
1667                 mature_immBlock(body_block);
1668                 mature_immBlock(false_block);
1669                 return;
1670         }
1671
1672         ir_node *body_jmp = new_Jmp();
1673         add_immBlock_pred(header_block, body_jmp);
1674         mature_immBlock(header_block);
1675
1676         /* create the condition */
1677         set_cur_block(header_block);
1678
1679         create_condition_evaluation(statement->condition, body_block, false_block);
1680         mature_immBlock(body_block);
1681         mature_immBlock(false_block);
1682         mature_immBlock(header_block);
1683
1684         set_cur_block(false_block);
1685 }
1686
1687 static void for_statement_to_firm(for_statement_t *statement)
1688 {
1689         ir_node *jmp = NULL;
1690         if (get_cur_block() != NULL) {
1691                 if(statement->initialisation != NULL) {
1692                         expression_to_firm(statement->initialisation);
1693                 }
1694                 jmp = new_Jmp();
1695         }
1696
1697         /* create the step block */
1698         ir_node *const step_block = new_immBlock();
1699         if (statement->step != NULL) {
1700                 expression_to_firm(statement->step);
1701         }
1702         ir_node *const step_jmp = new_Jmp();
1703
1704         /* create the header block */
1705         ir_node *const header_block = new_immBlock();
1706         if (jmp != NULL) {
1707                 add_immBlock_pred(header_block, jmp);
1708         }
1709         add_immBlock_pred(header_block, step_jmp);
1710
1711         /* the false block */
1712         ir_node *const false_block = new_immBlock();
1713
1714         /* the loop body */
1715         ir_node *const body_block = new_immBlock();
1716
1717         ir_node *const old_continue_label = continue_label;
1718         ir_node *const old_break_label    = break_label;
1719         continue_label = step_block;
1720         break_label    = false_block;
1721
1722         statement_to_firm(statement->body);
1723
1724         assert(continue_label == step_block);
1725         assert(break_label    == false_block);
1726         continue_label = old_continue_label;
1727         break_label    = old_break_label;
1728
1729         if (get_cur_block() != NULL) {
1730                 ir_node *const jmp = new_Jmp();
1731                 add_immBlock_pred(step_block, jmp);
1732         }
1733
1734         /* create the condition */
1735         set_cur_block(header_block);
1736         if (statement->condition != NULL) {
1737                 create_condition_evaluation(statement->condition, body_block,
1738                                             false_block);
1739         } else {
1740                 keep_alive(header_block);
1741                 ir_node *jmp = new_Jmp();
1742                 add_immBlock_pred(body_block, jmp);
1743         }
1744
1745         mature_immBlock(body_block);
1746         mature_immBlock(false_block);
1747         mature_immBlock(step_block);
1748         mature_immBlock(header_block);
1749         mature_immBlock(false_block);
1750
1751         set_cur_block(false_block);
1752 }
1753
1754 static void create_declaration_entity(declaration_t *declaration,
1755                                       declaration_type_t declaration_type,
1756                                       ir_type *parent_type)
1757 {
1758         ident     *id     = new_id_from_str(declaration->symbol->string);
1759         ir_type   *irtype = get_ir_type(declaration->type);
1760         ir_entity *entity = new_entity(parent_type, id, irtype);
1761         set_entity_ld_ident(entity, id);
1762
1763         declaration->declaration_type = declaration_type;
1764         declaration->v.entity         = entity;
1765         set_entity_variability(entity, variability_uninitialized);
1766         /* TODO: visibility? */
1767 }
1768
1769 static void create_initializer(declaration_t *declaration)
1770 {
1771         initializer_t *initializer = declaration->init.initializer;
1772         if(initializer == NULL)
1773                 return;
1774
1775         if(initializer->type == INITIALIZER_VALUE) {
1776                 assert(initializer->designator == NULL);
1777                 assert(initializer->next == NULL);
1778                 ir_node *init_node = expression_to_firm(initializer->v.value);
1779
1780                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1781                         set_value(declaration->v.value_number, init_node);
1782                 } else {
1783                         ir_entity *entity = declaration->v.entity;
1784
1785                         set_entity_variability(entity, variability_initialized);
1786                         set_atomic_ent_value(entity, init_node);
1787                 }
1788         } else {
1789                 assert(initializer->type == INITIALIZER_LIST);
1790                 panic("list initializer not supported yet");
1791         }
1792 }
1793
1794 static void create_local_variable(declaration_t *declaration)
1795 {
1796         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1797
1798         bool needs_entity = declaration->address_taken;
1799         type_t *type = skip_typeref(declaration->type);
1800
1801         if(type->type == TYPE_ARRAY
1802                         || type->type == TYPE_COMPOUND_STRUCT
1803                         || type->type == TYPE_COMPOUND_UNION) {
1804                 needs_entity = true;
1805         }
1806
1807         if(needs_entity) {
1808                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1809                 create_declaration_entity(declaration,
1810                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1811                                           frame_type);
1812         } else {
1813                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1814                 declaration->v.value_number   = next_value_number_function;
1815                 ++next_value_number_function;
1816         }
1817
1818         create_initializer(declaration);
1819 }
1820
1821 static void declaration_statement_to_firm(declaration_statement_t *statement)
1822 {
1823         declaration_t *declaration = statement->declarations_begin;
1824         declaration_t *end         = statement->declarations_end->next;
1825         for( ; declaration != end; declaration = declaration->next) {
1826                 type_t *type = declaration->type;
1827
1828                 switch(declaration->storage_class) {
1829                 case STORAGE_CLASS_TYPEDEF:
1830                         continue;
1831                 case STORAGE_CLASS_STATIC:
1832                         panic("static local vars not implemented yet");
1833                 case STORAGE_CLASS_ENUM_ENTRY:
1834                         panic("enum entry declaration in local block found");
1835                 case STORAGE_CLASS_EXTERN:
1836                         panic("extern declaration in local block found");
1837                 case STORAGE_CLASS_NONE:
1838                 case STORAGE_CLASS_AUTO:
1839                 case STORAGE_CLASS_REGISTER:
1840                         if(type->type == TYPE_FUNCTION) {
1841                                 panic("nested functions not supported yet");
1842                         } else {
1843                                 create_local_variable(declaration);
1844                         }
1845                         continue;
1846                 }
1847                 panic("invalid storage class found");
1848         }
1849 }
1850
1851 static void create_jump_statement(const statement_t *statement,
1852                                   ir_node *target_block)
1853 {
1854         if(get_cur_block() == NULL)
1855                 return;
1856
1857         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1858         ir_node  *jump = new_d_Jmp(dbgi);
1859         add_immBlock_pred(target_block, jump);
1860
1861         set_cur_block(NULL);
1862 }
1863
1864 static void switch_statement_to_firm(const switch_statement_t *statement)
1865 {
1866         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1867
1868         ir_node *expression  = expression_to_firm(statement->expression);
1869         ir_node *cond        = new_d_Cond(dbgi, expression);
1870         ir_node *break_block = new_immBlock();
1871
1872         set_cur_block(NULL);
1873
1874         ir_node *const old_switch_cond       = current_switch_cond;
1875         ir_node *const old_break_label       = break_label;
1876         const bool     old_saw_default_label = saw_default_label;
1877         current_switch_cond                  = cond;
1878         break_label                          = break_block;
1879
1880         statement_to_firm(statement->body);
1881
1882         if(get_cur_block() != NULL) {
1883                 ir_node *jmp = new_Jmp();
1884                 add_immBlock_pred(break_block, jmp);
1885         }
1886
1887         if (!saw_default_label) {
1888                 set_cur_block(get_nodes_block(cond));
1889                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
1890                                                         MAGIC_DEFAULT_PN_NUMBER);
1891                 add_immBlock_pred(break_block, proj);
1892         }
1893
1894         assert(current_switch_cond == cond);
1895         assert(break_label         == break_block);
1896         current_switch_cond = old_switch_cond;
1897         break_label         = old_break_label;
1898         saw_default_label   = old_saw_default_label;
1899
1900         mature_immBlock(break_block);
1901         set_cur_block(break_block);
1902 }
1903
1904 static long fold_constant(const expression_t *expression)
1905 {
1906         ir_graph *old_current_ir_graph = current_ir_graph;
1907         current_ir_graph = get_const_code_irg();
1908
1909         ir_node *cnst = expression_to_firm(expression);
1910         if(!is_Const(cnst)) {
1911                 panic("couldn't fold constantl");
1912         }
1913         tarval *tv = get_Const_tarval(cnst);
1914         if(!tarval_is_long(tv)) {
1915                 panic("folded constant not an integer");
1916         }
1917
1918         long res = get_tarval_long(tv);
1919
1920         current_ir_graph = old_current_ir_graph;
1921         return res;
1922 }
1923
1924 static void case_label_to_firm(const case_label_statement_t *statement)
1925 {
1926         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1927
1928         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
1929
1930         /* let's create a node and hope firm constant folding creates a Const
1931          * node... */
1932         ir_node *proj;
1933         set_cur_block(get_nodes_block(current_switch_cond));
1934         if(statement->expression) {
1935                 long pn = fold_constant(statement->expression);
1936                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1937                         /* oops someone detected our cheating... */
1938                         panic("magic default pn used");
1939                 }
1940                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1941         } else {
1942                 saw_default_label = true;
1943                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1944                                          MAGIC_DEFAULT_PN_NUMBER);
1945         }
1946
1947         ir_node *block = new_immBlock();
1948         if (fallthrough != NULL) {
1949                 add_immBlock_pred(block, fallthrough);
1950         }
1951         add_immBlock_pred(block, proj);
1952         mature_immBlock(block);
1953 }
1954
1955 static ir_node *get_label_block(declaration_t *label)
1956 {
1957         assert(label->namespace == NAMESPACE_LABEL);
1958
1959         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1960                 return label->v.block;
1961         }
1962         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1963
1964         ir_node *old_cur_block = get_cur_block();
1965         ir_node *block         = new_immBlock();
1966         set_cur_block(old_cur_block);
1967
1968         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1969         label->v.block          = block;
1970
1971         ARR_APP1(ir_node *, imature_blocks, block);
1972
1973         return block;
1974 }
1975
1976 static void label_to_firm(const label_statement_t *statement)
1977 {
1978         ir_node *block = get_label_block(statement->label);
1979
1980         if(get_cur_block() != NULL) {
1981                 ir_node *jmp = new_Jmp();
1982                 add_immBlock_pred(block, jmp);
1983         }
1984
1985         set_cur_block(block);
1986         keep_alive(block);
1987
1988         statement_to_firm(statement->label_statement);
1989 }
1990
1991 static void goto_to_firm(const goto_statement_t *statement)
1992 {
1993         if(get_cur_block() == NULL)
1994                 return;
1995
1996         ir_node *block = get_label_block(statement->label);
1997         ir_node *jmp   = new_Jmp();
1998         add_immBlock_pred(block, jmp);
1999
2000         set_cur_block(NULL);
2001 }
2002
2003 static void statement_to_firm(statement_t *statement)
2004 {
2005         switch(statement->type) {
2006         case STATEMENT_COMPOUND:
2007                 compound_statement_to_firm((compound_statement_t*) statement);
2008                 return;
2009         case STATEMENT_RETURN:
2010                 return_statement_to_firm((return_statement_t*) statement);
2011                 return;
2012         case STATEMENT_EXPRESSION:
2013                 expression_statement_to_firm((expression_statement_t*) statement);
2014                 return;
2015         case STATEMENT_IF:
2016                 if_statement_to_firm((if_statement_t*) statement);
2017                 return;
2018         case STATEMENT_WHILE:
2019                 while_statement_to_firm((while_statement_t*) statement);
2020                 return;
2021         case STATEMENT_DO_WHILE:
2022                 do_while_statement_to_firm((do_while_statement_t*) statement);
2023                 return;
2024         case STATEMENT_DECLARATION:
2025                 declaration_statement_to_firm((declaration_statement_t*) statement);
2026                 return;
2027         case STATEMENT_BREAK:
2028                 create_jump_statement(statement, break_label);
2029                 return;
2030         case STATEMENT_CONTINUE:
2031                 create_jump_statement(statement, continue_label);
2032                 return;
2033         case STATEMENT_SWITCH:
2034                 switch_statement_to_firm((switch_statement_t*) statement);
2035                 return;
2036         case STATEMENT_CASE_LABEL:
2037                 case_label_to_firm((case_label_statement_t*) statement);
2038                 return;
2039         case STATEMENT_FOR:
2040                 for_statement_to_firm((for_statement_t*) statement);
2041                 return;
2042         case STATEMENT_LABEL:
2043                 label_to_firm((label_statement_t*) statement);
2044                 return;
2045         case STATEMENT_GOTO:
2046                 goto_to_firm((goto_statement_t*) statement);
2047                 return;
2048         default:
2049                 break;
2050         }
2051         panic("Statement not implemented\n");
2052 }
2053
2054 static int get_function_n_local_vars(declaration_t *declaration)
2055 {
2056         (void) declaration;
2057         /* TODO */
2058         return 30;
2059 }
2060
2061 static void initialize_function_parameters(declaration_t *declaration)
2062 {
2063         ir_graph *irg         = current_ir_graph;
2064         ir_node  *args        = get_irg_args(irg);
2065         ir_node  *start_block = get_irg_start_block(irg);
2066
2067         int            n         = 0;
2068         declaration_t *parameter = declaration->context.declarations;
2069         for( ; parameter != NULL; parameter = parameter->next) {
2070                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2071                 type_t *type = parameter->type;
2072
2073                 bool needs_entity = parameter->address_taken;
2074                 if(type->type == TYPE_COMPOUND_STRUCT
2075                                 || type->type == TYPE_COMPOUND_UNION) {
2076                         needs_entity = true;
2077                 }
2078
2079                 if(needs_entity) {
2080                         panic("entities for function parameters not implemented yet");
2081                 }
2082
2083                 ir_mode *mode = get_ir_mode(parameter->type);
2084                 long     pn   = n;
2085                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2086                 ++n;
2087
2088                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2089                 parameter->v.value_number   = next_value_number_function;
2090                 ++next_value_number_function;
2091
2092                 set_value(parameter->v.value_number, proj);
2093         }
2094 }
2095
2096 static void create_function(declaration_t *declaration)
2097 {
2098         ir_entity *entity = get_function_entity(declaration);
2099
2100         if(declaration->init.statement == NULL)
2101                 return;
2102
2103         assert(imature_blocks == NULL);
2104         imature_blocks = NEW_ARR_F(ir_node*, 0);
2105
2106         int       n_local_vars = get_function_n_local_vars(declaration);
2107         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2108         ir_node  *first_block  = get_cur_block();
2109
2110         next_value_number_function = 0;
2111         initialize_function_parameters(declaration);
2112
2113         statement_to_firm(declaration->init.statement);
2114
2115         ir_node *end_block = get_irg_end_block(irg);
2116
2117         /* do we have a return statement yet? */
2118         if(get_cur_block() != NULL) {
2119                 assert(declaration->type->type == TYPE_FUNCTION);
2120                 const function_type_t* const func_type
2121                         = (const function_type_t*) declaration->type;
2122                 ir_node *ret;
2123                 if (func_type->result_type == type_void) {
2124                         ret = new_Return(get_store(), 0, NULL);
2125                 } else {
2126                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2127                         ir_node *      in[1];
2128                         // §5.1.2.2.3 main implicitly returns 0
2129                         if (strcmp(declaration->symbol->string, "main") == 0) {
2130                                 in[0] = new_Const(mode, get_mode_null(mode));
2131                         } else {
2132                                 in[0] = new_Unknown(mode);
2133                         }
2134                         ret = new_Return(get_store(), 1, in);
2135                 }
2136                 add_immBlock_pred(end_block, ret);
2137         }
2138
2139         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2140                 mature_immBlock(imature_blocks[i]);
2141         }
2142         DEL_ARR_F(imature_blocks);
2143         imature_blocks = NULL;
2144
2145         mature_immBlock(first_block);
2146         mature_immBlock(end_block);
2147
2148         irg_finalize_cons(irg);
2149
2150         /* finalize the frame type */
2151         ir_type *frame_type = get_irg_frame_type(irg);
2152         int      n          = get_compound_n_members(frame_type);
2153         int      align_all  = 4;
2154         int      offset     = 0;
2155         for(int i = 0; i < n; ++i) {
2156                 ir_entity *entity      = get_compound_member(frame_type, i);
2157                 ir_type   *entity_type = get_entity_type(entity);
2158
2159                 int align = get_type_alignment_bytes(entity_type);
2160                 if(align > align_all)
2161                         align_all = align;
2162                 int misalign = 0;
2163                 if(align > 0) {
2164                         misalign  = offset % align;
2165                         offset   += misalign;
2166                 }
2167
2168                 set_entity_offset(entity, offset);
2169                 offset += get_type_size_bytes(entity_type);
2170         }
2171         set_type_size_bytes(frame_type, offset);
2172         set_type_alignment_bytes(frame_type, align_all);
2173         set_type_state(frame_type, layout_fixed);
2174
2175         irg_vrfy(irg);
2176 }
2177
2178 static void create_global_variable(declaration_t *declaration)
2179 {
2180         ir_type   *global_type = get_glob_type();
2181         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2182                                   global_type);
2183
2184         ir_entity *entity = declaration->v.entity;
2185         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2186                 set_entity_visibility(entity, visibility_local);
2187         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2188                 set_entity_visibility(entity, visibility_external_allocated);
2189         } else {
2190                 set_entity_visibility(entity, visibility_external_visible);
2191         }
2192         current_ir_graph = get_const_code_irg();
2193         create_initializer(declaration);
2194 }
2195
2196 static void context_to_firm(context_t *context)
2197 {
2198         declaration_t *declaration = context->declarations;
2199         for( ; declaration != NULL; declaration = declaration->next) {
2200                 if(declaration->namespace != NAMESPACE_NORMAL)
2201                         continue;
2202                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2203                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2204                         continue;
2205                 if(declaration->symbol == NULL)
2206                         continue;
2207
2208                 type_t *type = declaration->type;
2209                 if(type->type == TYPE_FUNCTION) {
2210                         create_function(declaration);
2211                 } else {
2212                         create_global_variable(declaration);
2213                 }
2214         }
2215 }
2216
2217 void translation_unit_to_firm(translation_unit_t *unit)
2218 {
2219         /* remove me later TODO FIXME */
2220         (void) get_type_size;
2221
2222         /* just to be sure */
2223         continue_label      = NULL;
2224         break_label         = NULL;
2225         current_switch_cond = NULL;
2226
2227         context_to_firm(& unit->context);
2228 }