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 *deref_address(type_t *const type, ir_node *const addr,
 608                               dbg_info *const dbgi)
 609 {
 610         switch (type->type) {
 611                 case TYPE_ARRAY:
 612                 case TYPE_COMPOUND_STRUCT:
 613                 case TYPE_COMPOUND_UNION:
 614                         return addr;
 615
 616                 default: {
 617                         ir_mode *const mode     = get_ir_mode(type);
 618                         ir_node *const memory   = get_store();
 619                         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 620                         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 621                         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 622                         set_store(load_mem);
 623                         return load_res;
 624                 }
 625         }
 626 }
 627
 628 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 629 {
 630         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 631         declaration_t *declaration = ref->declaration;
 632         type_t        *type        = skip_typeref(declaration->type);
 633
 634         switch((declaration_type_t) declaration->declaration_type) {
 635         case DECLARATION_TYPE_UNKNOWN:
 636                 break;
 637         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 638                 ir_mode *mode = get_ir_mode(type);
 639                 return get_value(declaration->v.value_number, mode);
 640         }
 641         case DECLARATION_TYPE_FUNCTION: {
 642                 return create_symconst(dbgi, declaration->v.entity);
 643         }
 644         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 645                 ir_entity *entity   = declaration->v.entity;
 646                 ir_node   *symconst = create_symconst(dbgi, entity);
 647                 return deref_address(type, symconst, dbgi);
 648         }
 649         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 650                 ir_entity *entity = declaration->v.entity;
 651                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 652                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 653                 return deref_address(type, sel, dbgi);
 654         }
 655
 656         case DECLARATION_TYPE_COMPOUND_MEMBER:
 657         case DECLARATION_TYPE_LABEL_BLOCK:
 658                 panic("not implemented reference type");
 659         }
 660
 661         panic("reference to declaration with unknown type found");
 662 }
 663
 664 static ir_node *reference_addr(const reference_expression_t *ref)
 665 {
 666         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 667         declaration_t *declaration = ref->declaration;
 668
 669         switch((declaration_type_t) declaration->declaration_type) {
 670         case DECLARATION_TYPE_UNKNOWN:
 671                 break;
 672         case DECLARATION_TYPE_LOCAL_VARIABLE:
 673                 panic("local variable without entity has no address");
 674         case DECLARATION_TYPE_FUNCTION: {
 675                 return create_symconst(dbgi, declaration->v.entity);
 676         }
 677         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 678                 ir_entity *entity   = declaration->v.entity;
 679                 ir_node   *symconst = create_symconst(dbgi, entity);
 680                 return symconst;
 681         }
 682         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 683                 ir_entity *entity = declaration->v.entity;
 684                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 685                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 686
 687                 return sel;
 688         }
 689         case DECLARATION_TYPE_COMPOUND_MEMBER:
 690         case DECLARATION_TYPE_LABEL_BLOCK:
 691                 panic("not implemented reference type");
 692         }
 693
 694         panic("reference to declaration with unknown type found");
 695 }
 696
 697 static ir_node *call_expression_to_firm(const call_expression_t *call)
 698 {
 699         assert(get_cur_block() != NULL);
 700
 701         expression_t  *function = call->function;
 702         ir_node       *callee   = expression_to_firm(function);
 703
 704         assert(function->datatype->type == TYPE_FUNCTION);
 705         function_type_t *function_type = (function_type_t*) function->datatype;
 706
 707         int              n_parameters = 0;
 708         call_argument_t *argument     = call->arguments;
 709         for( ; argument != NULL; argument = argument->next) {
 710                 ++n_parameters;
 711         }
 712
 713         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 714         ir_type *new_method_type = NULL;
 715         if(function_type->variadic || function_type->unspecified_parameters) {
 716                 /* we need to construct a new method type matching the call
 717                  * arguments... */
 718                 int n_res       = get_method_n_ress(ir_method_type);
 719                 new_method_type = new_type_method(unique_ident("calltype"),
 720                                                   n_parameters, n_res);
 721                 set_method_calling_convention(new_method_type,
 722                                get_method_calling_convention(ir_method_type));
 723                 set_method_additional_properties(new_method_type,
 724                                get_method_additional_properties(ir_method_type));
 725
 726                 for(int i = 0; i < n_res; ++i) {
 727                         set_method_res_type(new_method_type, i,
 728                                             get_method_res_type(ir_method_type, i));
 729                 }
 730         }
 731         ir_node *in[n_parameters];
 732
 733         argument = call->arguments;
 734         int n = 0;
 735         for( ; argument != NULL; argument = argument->next) {
 736                 expression_t *expression = argument->expression;
 737                 ir_node      *arg_node   = expression_to_firm(expression);
 738
 739                 in[n] = arg_node;
 740                 if(new_method_type != NULL) {
 741                         ir_type *irtype = get_ir_type(expression->datatype);
 742                         set_method_param_type(new_method_type, n, irtype);
 743                 }
 744
 745                 n++;
 746         }
 747         assert(n == n_parameters);
 748
 749         if(new_method_type != NULL)
 750                 ir_method_type = new_method_type;
 751
 752         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 753         ir_node  *store = get_store();
 754         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 755                                      ir_method_type);
 756         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 757         set_store(mem);
 758
 759         type_t  *result_type = function_type->result_type;
 760         ir_node *result      = NULL;
 761         if(result_type != type_void) {
 762                 ir_mode *mode    = get_ir_mode(result_type);
 763                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 764                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 765         }
 766
 767         return result;
 768 }
 769
 770 static ir_node *expression_to_addr(const expression_t *expression);
 771 static void create_condition_evaluation(const expression_t *expression,
 772                                         ir_node *true_block,
 773                                         ir_node *false_block);
 774
 775 static void set_value_for_expression(const expression_t *expression,
 776                                      ir_node *value)
 777 {
 778         if(expression->type == EXPR_REFERENCE) {
 779                 reference_expression_t *ref = (reference_expression_t*) expression;
 780
 781                 declaration_t *declaration = ref->declaration;
 782                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 783                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 784                         set_value(declaration->v.value_number, value);
 785                         return;
 786                 }
 787         }
 788
 789         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 790         ir_node  *addr      = expression_to_addr(expression);
 791         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 792         ir_node  *memory    = get_store();
 793         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 794         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 795         set_store(store_mem);
 796 }
 797
 798 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 799 {
 800         ir_mode *value_mode = get_irn_mode(value);
 801
 802         if(value_mode == dest_mode)
 803                 return value;
 804
 805         if(dest_mode == mode_b) {
 806                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 807                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 808                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 809                 return proj;
 810         }
 811
 812         return new_d_Conv(dbgi, value, dest_mode);
 813 }
 814
 815 static ir_node *create_incdec(const unary_expression_t *expression)
 816 {
 817         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 818         type_t       *type  = expression->expression.datatype;
 819         ir_mode      *mode  = get_ir_mode(type);
 820         expression_t *value = expression->value;
 821
 822         ir_node *value_node = expression_to_firm(value);
 823
 824         ir_node *offset;
 825         if(type->type == TYPE_POINTER) {
 826                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 827                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 828                 offset = new_Const_long(mode_Is, elem_size);
 829         } else {
 830                 assert(is_type_arithmetic(type));
 831                 offset = new_Const(mode, get_mode_one(mode));
 832         }
 833
 834         ir_node *new_value;
 835         switch(expression->type) {
 836         case UNEXPR_POSTFIX_INCREMENT: {
 837                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 838                 set_value_for_expression(value, new_value);
 839                 return value_node;
 840         }
 841         case UNEXPR_POSTFIX_DECREMENT: {
 842                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 843                 set_value_for_expression(value, new_value);
 844                 return value_node;
 845         }
 846         case UNEXPR_PREFIX_INCREMENT: {
 847                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 848                 set_value_for_expression(value, new_value);
 849                 return new_value;
 850         }
 851         case UNEXPR_PREFIX_DECREMENT: {
 852                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 853                 set_value_for_expression(value, new_value);
 854                 return new_value;
 855         }
 856         default:
 857                 panic("no incdec expr in create_incdec");
 858         }
 859
 860         return new_value;
 861 }
 862
 863 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 864 {
 865         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 866         type_t   *type = expression->expression.datatype;
 867
 868         if(expression->type == UNEXPR_TAKE_ADDRESS)
 869                 return expression_to_addr(expression->value);
 870
 871         const expression_t *value      = expression->value;
 872         ir_node            *value_node = expression_to_firm(value);
 873
 874         switch(expression->type) {
 875         case UNEXPR_NEGATE:
 876                 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
 877         case UNEXPR_PLUS:
 878                 return value_node;
 879         case UNEXPR_BITWISE_NEGATE:
 880                 return new_d_Not(dbgi, value_node, get_ir_mode(type));
 881         case UNEXPR_NOT: {
 882                 if(get_irn_mode(value_node) != mode_b) {
 883                         value_node = create_conv(dbgi, value_node, mode_b);
 884                 }
 885                 value_node = new_d_Not(dbgi, value_node, mode_b);
 886                 ir_mode *const mode = get_ir_mode(type);
 887                 if(mode != mode_b) {
 888                         value_node = create_conv(dbgi, value_node, mode);
 889                 }
 890                 return value_node;
 891         }
 892         case UNEXPR_DEREFERENCE:
 893                 return deref_address(type, value_node, dbgi);
 894         case UNEXPR_POSTFIX_INCREMENT:
 895         case UNEXPR_POSTFIX_DECREMENT:
 896         case UNEXPR_PREFIX_INCREMENT:
 897         case UNEXPR_PREFIX_DECREMENT:
 898                 return create_incdec(expression);
 899         case UNEXPR_CAST:
 900                 return create_conv(dbgi, value_node, get_ir_mode(type));
 901
 902         case UNEXPR_TAKE_ADDRESS:
 903         case UNEXPR_INVALID:
 904                 break;
 905         }
 906         panic("invalid UNEXPR type found");
 907 }
 908
 909 static long get_pnc(binary_expression_type_t type)
 910 {
 911         switch(type) {
 912         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 913         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 914         case BINEXPR_LESS:         return pn_Cmp_Lt;
 915         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 916         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 917         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 918         default:
 919                 break;
 920         }
 921         panic("trying to get pn_Cmp from non-comparison binexpr type");
 922 }
 923
 924 static ir_node *create_lazy_op(const binary_expression_t *expression)
 925 {
 926         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 927         type_t   *type = expression->expression.datatype;
 928         ir_mode  *mode = get_ir_mode(type);
 929
 930         ir_node *cur_block = get_cur_block();
 931
 932         ir_node *one_block = new_immBlock();
 933         ir_node *one       = new_Const(mode, get_mode_one(mode));
 934         ir_node *jmp_one   = new_d_Jmp(dbgi);
 935
 936         ir_node *zero_block = new_immBlock();
 937         ir_node *zero       = new_Const(mode, get_mode_null(mode));
 938         ir_node *jmp_zero   = new_d_Jmp(dbgi);
 939
 940         set_cur_block(cur_block);
 941         create_condition_evaluation((const expression_t*) expression,
 942                                     one_block, zero_block);
 943         mature_immBlock(one_block);
 944         mature_immBlock(zero_block);
 945
 946         ir_node *common_block = new_immBlock();
 947         add_immBlock_pred(common_block, jmp_one);
 948         add_immBlock_pred(common_block, jmp_zero);
 949         mature_immBlock(common_block);
 950
 951         ir_node *in[2] = { one, zero };
 952         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
 953
 954         return val;
 955 }
 956
 957 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 958                                             ir_node *right, ir_mode *mode);
 959
 960 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 961                                         create_arithmetic_func func)
 962 {
 963         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 964         ir_node  *left  = expression_to_firm(expression->left);
 965         ir_node  *right = expression_to_firm(expression->right);
 966         type_t   *type  = expression->right->datatype;
 967         /* be careful with the modes, because in asithmetic assign nodes only
 968          * the right operand has the mode of the arithmetic alread */
 969         ir_mode  *mode  = get_ir_mode(type);
 970         left            = create_conv(dbgi, left, mode);
 971         ir_node  *res   = func(dbgi, left, right, mode);
 972
 973         return res;
 974 }
 975
 976 static ir_node *pointer_arithmetic(ir_node  *const pointer,
 977                                    ir_node  *      integer,
 978                                    type_t   *const type,
 979                                    dbg_info *const dbgi,
 980                                    const create_arithmetic_func func)
 981 {
 982         pointer_type_t *const pointer_type = (pointer_type_t*)type;
 983         type_t         *const points_to    = pointer_type->points_to;
 984         const unsigned        elem_size    = get_type_size(points_to);
 985
 986         assert(elem_size >= 1);
 987         if (elem_size > 1) {
 988                 integer             = create_conv(dbgi, integer, mode_Is);
 989                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
 990                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
 991                 integer = mul;
 992         }
 993
 994         ir_mode *const mode = get_ir_mode(type);
 995         return func(dbgi, pointer, integer, mode);
 996 }
 997
 998 static ir_node *create_arithmetic_assign_binop(
 999                 const binary_expression_t *expression, create_arithmetic_func func)
1000 {
1001         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1002         type_t   *const type = expression->expression.datatype;
1003         ir_node  *value;
1004
1005         if (type->type == TYPE_POINTER) {
1006                 ir_node        *const pointer = expression_to_firm(expression->left);
1007                 ir_node        *      integer = expression_to_firm(expression->right);
1008                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1009         } else {
1010                 value = create_arithmetic_binop(expression, func);
1011         }
1012
1013         ir_mode  *const mode = get_ir_mode(type);
1014         value = create_conv(dbgi, value, mode);
1015         set_value_for_expression(expression->left, value);
1016
1017         return value;
1018 }
1019
1020 static ir_node *create_add(const binary_expression_t *expression)
1021 {
1022         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1023         ir_node  *left  = expression_to_firm(expression->left);
1024         ir_node  *right = expression_to_firm(expression->right);
1025         type_t   *type  = expression->expression.datatype;
1026
1027         expression_t *expr_left  = expression->left;
1028         expression_t *expr_right = expression->right;
1029         type_t       *type_left  = skip_typeref(expr_left->datatype);
1030         type_t       *type_right = skip_typeref(expr_right->datatype);
1031
1032         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1033                 ir_mode *const mode = get_ir_mode(type);
1034                 return new_d_Add(dbgi, left, right, mode);
1035         }
1036
1037         if(type_left->type == TYPE_POINTER) {
1038                 return pointer_arithmetic(left, right, type_left, dbgi, new_d_Add);
1039         } else {
1040                 assert(type_right->type == TYPE_POINTER);
1041                 return pointer_arithmetic(right, left, type_right, dbgi, new_d_Add);
1042         }
1043 }
1044
1045 static ir_node *create_sub(const binary_expression_t *expression)
1046 {
1047         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1048         expression_t *const expr_left  = expression->left;
1049         expression_t *const expr_right = expression->right;
1050         ir_node      *const left       = expression_to_firm(expr_left);
1051         ir_node      *const right      = expression_to_firm(expr_right);
1052         type_t       *const type       = expression->expression.datatype;
1053         type_t       *const type_left  = skip_typeref(expr_left->datatype);
1054         type_t       *const type_right = skip_typeref(expr_right->datatype);
1055
1056         if ((is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) ||
1057             (type_left->type == TYPE_POINTER && type_right->type == TYPE_POINTER)) {
1058                 ir_mode *const mode = get_ir_mode(type);
1059                 return new_d_Sub(dbgi, left, right, mode);
1060         }
1061
1062         assert(type_left->type == TYPE_POINTER);
1063         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1064 }
1065
1066 static ir_node *create_shift(const binary_expression_t *expression)
1067 {
1068         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1069         ir_node  *left  = expression_to_firm(expression->left);
1070         ir_node  *right = expression_to_firm(expression->right);
1071         type_t   *type  = expression->expression.datatype;
1072         ir_mode  *mode  = get_ir_mode(type);
1073
1074         /* firm always wants the shift count to be unsigned */
1075         right = create_conv(dbgi, right, mode_Iu);
1076
1077         ir_node *res;
1078
1079         switch(expression->type) {
1080         case BINEXPR_SHIFTLEFT:
1081                 res = new_d_Shl(dbgi, left, right, mode);
1082                 break;
1083         case BINEXPR_SHIFTRIGHT: {
1084                  expression_t *expr_left = expression->left;
1085                  type_t       *type_left = skip_typeref(expr_left->datatype);
1086
1087                  if(is_type_signed(type_left)) {
1088                         res = new_d_Shrs(dbgi, left, right, mode);
1089                  } else {
1090                          res = new_d_Shr(dbgi, left, right, mode);
1091                  }
1092                  break;
1093         }
1094         default:
1095                 panic("create shift op called for non-shift op");
1096         }
1097
1098         return res;
1099 }
1100
1101
1102 static ir_node *create_divmod(const binary_expression_t *expression)
1103 {
1104         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1105         ir_node  *left  = expression_to_firm(expression->left);
1106         ir_node  *right = expression_to_firm(expression->right);
1107         ir_node  *pin   = new_Pin(new_NoMem());
1108         type_t   *type  = expression->expression.datatype;
1109         ir_mode  *mode  = get_ir_mode(type);
1110         ir_node  *op;
1111         ir_node  *res;
1112
1113         switch (expression->type)  {
1114                 case BINEXPR_DIV:
1115                 case BINEXPR_DIV_ASSIGN:
1116                         if(mode_is_float(mode)) {
1117                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1118                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1119                         } else {
1120                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1121                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1122                         }
1123                         break;
1124
1125                 case BINEXPR_MOD:
1126                 case BINEXPR_MOD_ASSIGN:
1127                         assert(!mode_is_float(mode));
1128                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1129                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1130                         break;
1131
1132                 default: panic("unexpected binary expression type in create_divmod()");
1133         }
1134
1135         return res;
1136 }
1137
1138 static ir_node *create_arithmetic_assign_divmod(
1139                 const binary_expression_t *expression)
1140 {
1141         ir_node  *      value = create_divmod(expression);
1142         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1143         type_t   *const type  = expression->expression.datatype;
1144         ir_mode  *const mode  = get_ir_mode(type);
1145
1146         assert(type->type != TYPE_POINTER);
1147
1148         value = create_conv(dbgi, value, mode);
1149         set_value_for_expression(expression->left, value);
1150
1151         return value;
1152 }
1153
1154
1155 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1156 {
1157         binary_expression_type_t type = expression->type;
1158         switch(type) {
1159         case BINEXPR_EQUAL:
1160         case BINEXPR_NOTEQUAL:
1161         case BINEXPR_LESS:
1162         case BINEXPR_LESSEQUAL:
1163         case BINEXPR_GREATER:
1164         case BINEXPR_GREATEREQUAL: {
1165                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1166                 ir_node *left  = expression_to_firm(expression->left);
1167                 ir_node *right = expression_to_firm(expression->right);
1168                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1169                 long     pnc   = get_pnc(type);
1170                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1171                 return proj;
1172         }
1173         case BINEXPR_ASSIGN: {
1174                 ir_node *right = expression_to_firm(expression->right);
1175                 set_value_for_expression(expression->left, right);
1176                 return right;
1177         }
1178         case BINEXPR_ADD:
1179                 return create_add(expression);
1180         case BINEXPR_SUB:
1181                 return create_sub(expression);
1182         case BINEXPR_MUL:
1183                 return create_arithmetic_binop(expression, new_d_Mul);
1184         case BINEXPR_BITWISE_AND:
1185                 return create_arithmetic_binop(expression, new_d_And);
1186         case BINEXPR_BITWISE_OR:
1187                 return create_arithmetic_binop(expression, new_d_Or);
1188         case BINEXPR_BITWISE_XOR:
1189                 return create_arithmetic_binop(expression, new_d_Eor);
1190         case BINEXPR_SHIFTLEFT:
1191         case BINEXPR_SHIFTRIGHT:
1192                 return create_shift(expression);
1193         case BINEXPR_DIV:
1194         case BINEXPR_MOD:
1195                 return create_divmod(expression);
1196         case BINEXPR_LOGICAL_AND:
1197         case BINEXPR_LOGICAL_OR:
1198                 return create_lazy_op(expression);
1199         case BINEXPR_COMMA:
1200                 expression_to_firm(expression->left);
1201                 return expression_to_firm(expression->right);
1202         case BINEXPR_ADD_ASSIGN:
1203                 return create_arithmetic_assign_binop(expression, new_d_Add);
1204         case BINEXPR_SUB_ASSIGN:
1205                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1206         case BINEXPR_MUL_ASSIGN:
1207                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1208         case BINEXPR_DIV_ASSIGN:
1209                 return create_arithmetic_assign_divmod(expression);
1210         case BINEXPR_BITWISE_AND_ASSIGN:
1211                 return create_arithmetic_assign_binop(expression, new_d_And);
1212         case BINEXPR_BITWISE_OR_ASSIGN:
1213                 return create_arithmetic_assign_binop(expression, new_d_Or);
1214         case BINEXPR_BITWISE_XOR_ASSIGN:
1215                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1216         case BINEXPR_SHIFTLEFT_ASSIGN:
1217                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1218         case BINEXPR_SHIFTRIGHT_ASSIGN:
1219                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1220         default:
1221                 panic("TODO binexpr type");
1222         }
1223 }
1224
1225 static ir_node *array_access_addr(const array_access_expression_t *expression)
1226 {
1227         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1228
1229         ir_node *base_addr = expression_to_firm(expression->array_ref);
1230         ir_node *offset    = expression_to_firm(expression->index);
1231         offset             = create_conv(dbgi, offset, mode_Iu);
1232
1233         unsigned elem_size       = get_type_size(expression->expression.datatype);
1234         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1235         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1236                                              mode_Iu);
1237         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1238
1239         return result;
1240 }
1241
1242 static ir_node *array_access_to_firm(
1243                 const array_access_expression_t *expression)
1244 {
1245         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1246         ir_node  *addr = array_access_addr(expression);
1247         type_t   *type = expression->expression.datatype;
1248         return deref_address(type, addr, dbgi);
1249 }
1250
1251 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1252 {
1253         type_t *type = expression->type;
1254         if(type == NULL) {
1255                 type = expression->size_expression->datatype;
1256                 assert(type != NULL);
1257         }
1258
1259         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1260         unsigned  size      = get_type_size(type);
1261         ir_node  *size_node = new_Const_long(mode, size);
1262
1263         return size_node;
1264 }
1265
1266 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1267 {
1268         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1269
1270         ir_node *cur_block   = get_cur_block();
1271
1272         /* create the true block */
1273         ir_node *true_block  = new_immBlock();
1274
1275         ir_node *true_val = expression_to_firm(expression->true_expression);
1276         ir_node *true_jmp = new_Jmp();
1277
1278         /* create the false block */
1279         ir_node *false_block = new_immBlock();
1280
1281         ir_node *false_val = expression_to_firm(expression->false_expression);
1282         ir_node *false_jmp = new_Jmp();
1283
1284         /* create the condition evaluation */
1285         set_cur_block(cur_block);
1286         create_condition_evaluation(expression->condition, true_block, false_block);
1287         mature_immBlock(true_block);
1288         mature_immBlock(false_block);
1289
1290         /* create the common block */
1291         ir_node *common_block = new_immBlock();
1292         add_immBlock_pred(common_block, true_jmp);
1293         add_immBlock_pred(common_block, false_jmp);
1294         mature_immBlock(common_block);
1295
1296         ir_node *in[2] = { true_val, false_val };
1297         ir_mode *mode  = get_irn_mode(true_val);
1298         assert(get_irn_mode(false_val) == mode);
1299         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1300
1301         return val;
1302 }
1303
1304 static ir_node *select_addr(const select_expression_t *expression)
1305 {
1306         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1307
1308         ir_node *compound_addr = expression_to_firm(expression->compound);
1309
1310         declaration_t *entry = expression->compound_entry;
1311         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1312         ir_entity     *entity = entry->v.entity;
1313
1314         assert(entity != NULL);
1315
1316         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1317
1318         return sel;
1319 }
1320
1321 static ir_node *select_to_firm(const select_expression_t *expression)
1322 {
1323         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1324         ir_node  *addr = select_addr(expression);
1325         type_t   *type = expression->expression.datatype;
1326         return deref_address(type, addr, dbgi);
1327 }
1328
1329 static ir_node *dereference_addr(const unary_expression_t *const expression)
1330 {
1331         assert(expression->type == UNEXPR_DEREFERENCE);
1332         return expression_to_firm(expression->value);
1333 }
1334
1335 static ir_node *expression_to_addr(const expression_t *expression)
1336 {
1337         switch(expression->type) {
1338         case EXPR_REFERENCE:
1339                 return reference_addr((const reference_expression_t*) expression);
1340         case EXPR_ARRAY_ACCESS:
1341                 return array_access_addr((const array_access_expression_t*) expression);
1342         case EXPR_SELECT:
1343                 return select_addr((const select_expression_t*) expression);
1344         case EXPR_UNARY: {
1345                 const unary_expression_t *const unary_expr =
1346                         (const unary_expression_t*)expression;
1347                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1348                         return dereference_addr(unary_expr);
1349                 }
1350                 break;
1351         }
1352         default:
1353                 break;
1354         }
1355         panic("trying to get address of non-lvalue");
1356 }
1357
1358 static ir_node *_expression_to_firm(const expression_t *expression)
1359 {
1360         switch(expression->type) {
1361         case EXPR_CONST:
1362                 return const_to_firm((const const_t*) expression);
1363         case EXPR_STRING_LITERAL:
1364                 return string_literal_to_firm((const string_literal_t*) expression);
1365         case EXPR_REFERENCE:
1366                 return reference_expression_to_firm(
1367                                 (const reference_expression_t*) expression);
1368         case EXPR_CALL:
1369                 return call_expression_to_firm((const call_expression_t*) expression);
1370         case EXPR_UNARY:
1371                 return unary_expression_to_firm((const unary_expression_t*) expression);
1372         case EXPR_BINARY:
1373                 return binary_expression_to_firm(
1374                                 (const binary_expression_t*) expression);
1375         case EXPR_ARRAY_ACCESS:
1376                 return array_access_to_firm(
1377                                 (const array_access_expression_t*) expression);
1378         case EXPR_SIZEOF:
1379                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1380         case EXPR_CONDITIONAL:
1381                 return conditional_to_firm((const conditional_expression_t*)expression);
1382         case EXPR_SELECT:
1383                 return select_to_firm((const select_expression_t*) expression);
1384         case EXPR_FUNCTION:
1385         case EXPR_OFFSETOF:
1386         case EXPR_PRETTY_FUNCTION:
1387         case EXPR_VA_ARG:
1388         case EXPR_STATEMENT:
1389         case EXPR_BUILTIN_SYMBOL:
1390                 panic("unimplemented expression found");
1391
1392         case EXPR_UNKNOWN:
1393         case EXPR_INVALID:
1394                 break;
1395         }
1396         panic("invalid expression found");
1397 }
1398
1399 static ir_node *expression_to_firm(const expression_t *expression)
1400 {
1401         ir_node *res = _expression_to_firm(expression);
1402
1403         if(res != NULL && get_irn_mode(res) == mode_b) {
1404                 ir_mode *mode = get_ir_mode(expression->datatype);
1405                 res           = create_conv(NULL, res, mode);
1406         }
1407
1408         return res;
1409 }
1410
1411 static ir_node *expression_to_modeb(const expression_t *expression)
1412 {
1413         ir_node *res = _expression_to_firm(expression);
1414         res          = create_conv(NULL, res, mode_b);
1415
1416         return res;
1417 }
1418
1419 /**
1420  * create a short-circuit expression evaluation that tries to construct
1421  * efficient control flow structures for &&, || and ! expressions
1422  */
1423 static void create_condition_evaluation(const expression_t *expression,
1424                                         ir_node *true_block,
1425                                         ir_node *false_block)
1426 {
1427         switch(expression->type) {
1428         case EXPR_UNARY: {
1429                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1430                 if(unary_expression->type == UNEXPR_NOT) {
1431                         create_condition_evaluation(unary_expression->value, false_block,
1432                                                     true_block);
1433                         return;
1434                 }
1435                 break;
1436         }
1437         case EXPR_BINARY: {
1438                 binary_expression_t *binary_expression
1439                         = (binary_expression_t*) expression;
1440                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1441                         ir_node *cur_block   = get_cur_block();
1442                         ir_node *extra_block = new_immBlock();
1443                         set_cur_block(cur_block);
1444                         create_condition_evaluation(binary_expression->left, extra_block,
1445                                                     false_block);
1446                         mature_immBlock(extra_block);
1447                         set_cur_block(extra_block);
1448                         create_condition_evaluation(binary_expression->right, true_block,
1449                                                     false_block);
1450                         return;
1451                 }
1452                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1453                         ir_node *cur_block   = get_cur_block();
1454                         ir_node *extra_block = new_immBlock();
1455                         set_cur_block(cur_block);
1456                         create_condition_evaluation(binary_expression->left, true_block,
1457                                                     extra_block);
1458                         mature_immBlock(extra_block);
1459                         set_cur_block(extra_block);
1460                         create_condition_evaluation(binary_expression->right, true_block,
1461                                                     false_block);
1462                         return;
1463                 }
1464                 break;
1465         }
1466         default:
1467                 break;
1468         }
1469
1470         dbg_info *dbgi       = get_dbg_info(&expression->source_position);
1471         ir_node  *condition  = expression_to_modeb(expression);
1472         ir_node  *cond       = new_d_Cond(dbgi, condition);
1473         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1474         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1475
1476         add_immBlock_pred(true_block, true_proj);
1477         add_immBlock_pred(false_block, false_proj);
1478
1479         set_cur_block(NULL);
1480 }
1481
1482 static void statement_to_firm(statement_t *statement);
1483
1484 static void return_statement_to_firm(return_statement_t *statement)
1485 {
1486         if(get_cur_block() == NULL)
1487                 return;
1488
1489         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1490         ir_node  *ret;
1491
1492         if(statement->return_value != NULL) {
1493                 ir_node *retval = expression_to_firm(statement->return_value);
1494                 ir_node *in[1];
1495
1496                 in[0] = retval;
1497                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1498         } else {
1499                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1500         }
1501         ir_node *end_block = get_irg_end_block(current_ir_graph);
1502         add_immBlock_pred(end_block, ret);
1503
1504         set_cur_block(NULL);
1505 }
1506
1507 static void compound_statement_to_firm(compound_statement_t *compound)
1508 {
1509         statement_t *statement = compound->statements;
1510         for( ; statement != NULL; statement = statement->next) {
1511                 //context2firm(&statement->context);
1512                 statement_to_firm(statement);
1513         }
1514 }
1515
1516 static void expression_statement_to_firm(expression_statement_t *statement)
1517 {
1518         if(get_cur_block() == NULL)
1519                 return;
1520
1521         expression_to_firm(statement->expression);
1522 }
1523
1524 static void if_statement_to_firm(if_statement_t *statement)
1525 {
1526         ir_node *cur_block = get_cur_block();
1527
1528         ir_node *fallthrough_block = new_immBlock();
1529
1530         /* the true (blocks) */
1531         ir_node *true_block = new_immBlock();
1532
1533         statement_to_firm(statement->true_statement);
1534         if(get_cur_block() != NULL) {
1535                 ir_node *jmp = new_Jmp();
1536                 add_immBlock_pred(fallthrough_block, jmp);
1537         }
1538
1539         /* the false (blocks) */
1540         ir_node *false_block;
1541         if(statement->false_statement != NULL) {
1542                 false_block = new_immBlock();
1543
1544                 statement_to_firm(statement->false_statement);
1545                 if(get_cur_block() != NULL) {
1546                         ir_node *jmp = new_Jmp();
1547                         add_immBlock_pred(fallthrough_block, jmp);
1548                 }
1549         } else {
1550                 false_block = fallthrough_block;
1551         }
1552
1553         /* create the condition */
1554         if(cur_block != NULL) {
1555                 set_cur_block(cur_block);
1556                 create_condition_evaluation(statement->condition, true_block,
1557                                             false_block);
1558         }
1559
1560         mature_immBlock(true_block);
1561         if(false_block != fallthrough_block) {
1562                 mature_immBlock(false_block);
1563         }
1564         mature_immBlock(fallthrough_block);
1565
1566         set_cur_block(fallthrough_block);
1567 }
1568
1569 static void while_statement_to_firm(while_statement_t *statement)
1570 {
1571         ir_node *jmp = NULL;
1572         if(get_cur_block() != NULL) {
1573                 jmp = new_Jmp();
1574         }
1575
1576         /* create the header block */
1577         ir_node *header_block = new_immBlock();
1578         if(jmp != NULL) {
1579                 add_immBlock_pred(header_block, jmp);
1580         }
1581
1582         /* the false block */
1583         ir_node *false_block = new_immBlock();
1584
1585         /* the loop body */
1586         ir_node *body_block = new_immBlock();
1587
1588         ir_node *old_continue_label = continue_label;
1589         ir_node *old_break_label    = break_label;
1590         continue_label              = header_block;
1591         break_label                 = false_block;
1592
1593         statement_to_firm(statement->body);
1594
1595         assert(continue_label == header_block);
1596         assert(break_label    == false_block);
1597         continue_label = old_continue_label;
1598         break_label    = old_break_label;
1599
1600         if(get_cur_block() != NULL) {
1601                 ir_node *jmp = new_Jmp();
1602                 add_immBlock_pred(header_block, jmp);
1603         }
1604
1605         /* create the condition */
1606         set_cur_block(header_block);
1607
1608         create_condition_evaluation(statement->condition, body_block, false_block);
1609         mature_immBlock(body_block);
1610         mature_immBlock(false_block);
1611         mature_immBlock(header_block);
1612
1613         set_cur_block(false_block);
1614 }
1615
1616 static void do_while_statement_to_firm(do_while_statement_t *statement)
1617 {
1618         ir_node *jmp = NULL;
1619         if(get_cur_block() != NULL) {
1620                 jmp = new_Jmp();
1621         }
1622
1623         /* create the header block */
1624         ir_node *header_block = new_immBlock();
1625
1626         /* the false block */
1627         ir_node *false_block = new_immBlock();
1628
1629         /* the loop body */
1630         ir_node *body_block = new_immBlock();
1631         if(jmp != NULL) {
1632                 add_immBlock_pred(body_block, jmp);
1633         }
1634
1635         ir_node *old_continue_label = continue_label;
1636         ir_node *old_break_label    = break_label;
1637         continue_label              = header_block;
1638         break_label                 = false_block;
1639
1640         statement_to_firm(statement->body);
1641
1642         assert(continue_label == header_block);
1643         assert(break_label    == false_block);
1644         continue_label = old_continue_label;
1645         break_label    = old_break_label;
1646
1647         if(get_cur_block() == NULL) {
1648                 mature_immBlock(header_block);
1649                 mature_immBlock(body_block);
1650                 mature_immBlock(false_block);
1651                 return;
1652         }
1653
1654         ir_node *body_jmp = new_Jmp();
1655         add_immBlock_pred(header_block, body_jmp);
1656         mature_immBlock(header_block);
1657
1658         /* create the condition */
1659         set_cur_block(header_block);
1660
1661         create_condition_evaluation(statement->condition, body_block, false_block);
1662         mature_immBlock(body_block);
1663         mature_immBlock(false_block);
1664         mature_immBlock(header_block);
1665
1666         set_cur_block(false_block);
1667 }
1668
1669 static void for_statement_to_firm(for_statement_t *statement)
1670 {
1671         ir_node *jmp = NULL;
1672         if (get_cur_block() != NULL) {
1673                 if(statement->initialisation != NULL) {
1674                         expression_to_firm(statement->initialisation);
1675                 }
1676                 jmp = new_Jmp();
1677         }
1678
1679         /* create the step block */
1680         ir_node *const step_block = new_immBlock();
1681         if (statement->step != NULL) {
1682                 expression_to_firm(statement->step);
1683         }
1684         ir_node *const step_jmp = new_Jmp();
1685
1686         /* create the header block */
1687         ir_node *const header_block = new_immBlock();
1688         if (jmp != NULL) {
1689                 add_immBlock_pred(header_block, jmp);
1690         }
1691         add_immBlock_pred(header_block, step_jmp);
1692
1693         /* the false block */
1694         ir_node *const false_block = new_immBlock();
1695
1696         /* the loop body */
1697         ir_node *const body_block = new_immBlock();
1698
1699         ir_node *const old_continue_label = continue_label;
1700         ir_node *const old_break_label    = break_label;
1701         continue_label = step_block;
1702         break_label    = false_block;
1703
1704         statement_to_firm(statement->body);
1705
1706         assert(continue_label == step_block);
1707         assert(break_label    == false_block);
1708         continue_label = old_continue_label;
1709         break_label    = old_break_label;
1710
1711         if (get_cur_block() != NULL) {
1712                 ir_node *const jmp = new_Jmp();
1713                 add_immBlock_pred(step_block, jmp);
1714         }
1715
1716         /* create the condition */
1717         set_cur_block(header_block);
1718         if (statement->condition != NULL) {
1719                 create_condition_evaluation(statement->condition, body_block,
1720                                             false_block);
1721         } else {
1722                 keep_alive(header_block);
1723                 ir_node *jmp = new_Jmp();
1724                 add_immBlock_pred(body_block, jmp);
1725         }
1726
1727         mature_immBlock(body_block);
1728         mature_immBlock(false_block);
1729         mature_immBlock(step_block);
1730         mature_immBlock(header_block);
1731         mature_immBlock(false_block);
1732
1733         set_cur_block(false_block);
1734 }
1735
1736 static void create_declaration_entity(declaration_t *declaration,
1737                                       declaration_type_t declaration_type,
1738                                       ir_type *parent_type)
1739 {
1740         ident     *id     = new_id_from_str(declaration->symbol->string);
1741         ir_type   *irtype = get_ir_type(declaration->type);
1742         ir_entity *entity = new_entity(parent_type, id, irtype);
1743         set_entity_ld_ident(entity, id);
1744
1745         declaration->declaration_type = declaration_type;
1746         declaration->v.entity         = entity;
1747         set_entity_variability(entity, variability_uninitialized);
1748         /* TODO: visibility? */
1749 }
1750
1751 static void create_initializer(declaration_t *declaration)
1752 {
1753         initializer_t *initializer = declaration->init.initializer;
1754         if(initializer == NULL)
1755                 return;
1756
1757         if(initializer->type == INITIALIZER_VALUE) {
1758                 assert(initializer->designator == NULL);
1759                 assert(initializer->next == NULL);
1760                 ir_node *init_node = expression_to_firm(initializer->v.value);
1761
1762                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1763                         set_value(declaration->v.value_number, init_node);
1764                 } else {
1765                         ir_entity *entity = declaration->v.entity;
1766
1767                         set_entity_variability(entity, variability_initialized);
1768                         set_atomic_ent_value(entity, init_node);
1769                 }
1770         } else {
1771                 assert(initializer->type == INITIALIZER_LIST);
1772                 panic("list initializer not supported yet");
1773         }
1774 }
1775
1776 static void create_local_variable(declaration_t *declaration)
1777 {
1778         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1779
1780         bool needs_entity = declaration->address_taken;
1781         type_t *type = skip_typeref(declaration->type);
1782
1783         if(type->type == TYPE_ARRAY
1784                         || type->type == TYPE_COMPOUND_STRUCT
1785                         || type->type == TYPE_COMPOUND_UNION) {
1786                 needs_entity = true;
1787         }
1788
1789         if(needs_entity) {
1790                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1791                 create_declaration_entity(declaration,
1792                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1793                                           frame_type);
1794         } else {
1795                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1796                 declaration->v.value_number   = next_value_number_function;
1797                 ++next_value_number_function;
1798         }
1799
1800         create_initializer(declaration);
1801 }
1802
1803 static void declaration_statement_to_firm(declaration_statement_t *statement)
1804 {
1805         declaration_t *declaration = statement->declarations_begin;
1806         declaration_t *end         = statement->declarations_end->next;
1807         for( ; declaration != end; declaration = declaration->next) {
1808                 type_t *type = declaration->type;
1809
1810                 switch(declaration->storage_class) {
1811                 case STORAGE_CLASS_TYPEDEF:
1812                         continue;
1813                 case STORAGE_CLASS_STATIC:
1814                         panic("static local vars not implemented yet");
1815                 case STORAGE_CLASS_ENUM_ENTRY:
1816                         panic("enum entry declaration in local block found");
1817                 case STORAGE_CLASS_EXTERN:
1818                         panic("extern declaration in local block found");
1819                 case STORAGE_CLASS_NONE:
1820                 case STORAGE_CLASS_AUTO:
1821                 case STORAGE_CLASS_REGISTER:
1822                         if(type->type == TYPE_FUNCTION) {
1823                                 panic("nested functions not supported yet");
1824                         } else {
1825                                 create_local_variable(declaration);
1826                         }
1827                         continue;
1828                 }
1829                 panic("invalid storage class found");
1830         }
1831 }
1832
1833 static void create_jump_statement(const statement_t *statement,
1834                                   ir_node *target_block)
1835 {
1836         if(get_cur_block() == NULL)
1837                 return;
1838
1839         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1840         ir_node  *jump = new_d_Jmp(dbgi);
1841         add_immBlock_pred(target_block, jump);
1842
1843         set_cur_block(NULL);
1844 }
1845
1846 static void switch_statement_to_firm(const switch_statement_t *statement)
1847 {
1848         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1849
1850         ir_node *expression  = expression_to_firm(statement->expression);
1851         ir_node *cond        = new_d_Cond(dbgi, expression);
1852         ir_node *break_block = new_immBlock();
1853
1854         set_cur_block(NULL);
1855
1856         ir_node *const old_switch_cond       = current_switch_cond;
1857         ir_node *const old_break_label       = break_label;
1858         const bool     old_saw_default_label = saw_default_label;
1859         current_switch_cond                  = cond;
1860         break_label                          = break_block;
1861
1862         statement_to_firm(statement->body);
1863
1864         if(get_cur_block() != NULL) {
1865                 ir_node *jmp = new_Jmp();
1866                 add_immBlock_pred(break_block, jmp);
1867         }
1868
1869         if (!saw_default_label) {
1870                 set_cur_block(get_nodes_block(cond));
1871                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
1872                                                         MAGIC_DEFAULT_PN_NUMBER);
1873                 add_immBlock_pred(break_block, proj);
1874         }
1875
1876         assert(current_switch_cond == cond);
1877         assert(break_label         == break_block);
1878         current_switch_cond = old_switch_cond;
1879         break_label         = old_break_label;
1880         saw_default_label   = old_saw_default_label;
1881
1882         mature_immBlock(break_block);
1883         set_cur_block(break_block);
1884 }
1885
1886 static long fold_constant(const expression_t *expression)
1887 {
1888         ir_graph *old_current_ir_graph = current_ir_graph;
1889         current_ir_graph = get_const_code_irg();
1890
1891         ir_node *cnst = expression_to_firm(expression);
1892         if(!is_Const(cnst)) {
1893                 panic("couldn't fold constantl");
1894         }
1895         tarval *tv = get_Const_tarval(cnst);
1896         if(!tarval_is_long(tv)) {
1897                 panic("folded constant not an integer");
1898         }
1899
1900         long res = get_tarval_long(tv);
1901
1902         current_ir_graph = old_current_ir_graph;
1903         return res;
1904 }
1905
1906 static void case_label_to_firm(const case_label_statement_t *statement)
1907 {
1908         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1909
1910         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
1911
1912         /* let's create a node and hope firm constant folding creates a Const
1913          * node... */
1914         ir_node *proj;
1915         set_cur_block(get_nodes_block(current_switch_cond));
1916         if(statement->expression) {
1917                 long pn = fold_constant(statement->expression);
1918                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1919                         /* oops someone detected our cheating... */
1920                         panic("magic default pn used");
1921                 }
1922                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1923         } else {
1924                 saw_default_label = true;
1925                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1926                                          MAGIC_DEFAULT_PN_NUMBER);
1927         }
1928
1929         ir_node *block = new_immBlock();
1930         if (fallthrough != NULL) {
1931                 add_immBlock_pred(block, fallthrough);
1932         }
1933         add_immBlock_pred(block, proj);
1934         mature_immBlock(block);
1935 }
1936
1937 static ir_node *get_label_block(declaration_t *label)
1938 {
1939         assert(label->namespace == NAMESPACE_LABEL);
1940
1941         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1942                 return label->v.block;
1943         }
1944         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1945
1946         ir_node *old_cur_block = get_cur_block();
1947         ir_node *block         = new_immBlock();
1948         set_cur_block(old_cur_block);
1949
1950         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1951         label->v.block          = block;
1952
1953         ARR_APP1(ir_node *, imature_blocks, block);
1954
1955         return block;
1956 }
1957
1958 static void label_to_firm(const label_statement_t *statement)
1959 {
1960         ir_node *block = get_label_block(statement->label);
1961
1962         if(get_cur_block() != NULL) {
1963                 ir_node *jmp = new_Jmp();
1964                 add_immBlock_pred(block, jmp);
1965         }
1966
1967         set_cur_block(block);
1968         keep_alive(block);
1969
1970         statement_to_firm(statement->label_statement);
1971 }
1972
1973 static void goto_to_firm(const goto_statement_t *statement)
1974 {
1975         if(get_cur_block() == NULL)
1976                 return;
1977
1978         ir_node *block = get_label_block(statement->label);
1979         ir_node *jmp   = new_Jmp();
1980         add_immBlock_pred(block, jmp);
1981
1982         set_cur_block(NULL);
1983 }
1984
1985 static void statement_to_firm(statement_t *statement)
1986 {
1987         switch(statement->type) {
1988         case STATEMENT_COMPOUND:
1989                 compound_statement_to_firm((compound_statement_t*) statement);
1990                 return;
1991         case STATEMENT_RETURN:
1992                 return_statement_to_firm((return_statement_t*) statement);
1993                 return;
1994         case STATEMENT_EXPRESSION:
1995                 expression_statement_to_firm((expression_statement_t*) statement);
1996                 return;
1997         case STATEMENT_IF:
1998                 if_statement_to_firm((if_statement_t*) statement);
1999                 return;
2000         case STATEMENT_WHILE:
2001                 while_statement_to_firm((while_statement_t*) statement);
2002                 return;
2003         case STATEMENT_DO_WHILE:
2004                 do_while_statement_to_firm((do_while_statement_t*) statement);
2005                 return;
2006         case STATEMENT_DECLARATION:
2007                 declaration_statement_to_firm((declaration_statement_t*) statement);
2008                 return;
2009         case STATEMENT_BREAK:
2010                 create_jump_statement(statement, break_label);
2011                 return;
2012         case STATEMENT_CONTINUE:
2013                 create_jump_statement(statement, continue_label);
2014                 return;
2015         case STATEMENT_SWITCH:
2016                 switch_statement_to_firm((switch_statement_t*) statement);
2017                 return;
2018         case STATEMENT_CASE_LABEL:
2019                 case_label_to_firm((case_label_statement_t*) statement);
2020                 return;
2021         case STATEMENT_FOR:
2022                 for_statement_to_firm((for_statement_t*) statement);
2023                 return;
2024         case STATEMENT_LABEL:
2025                 label_to_firm((label_statement_t*) statement);
2026                 return;
2027         case STATEMENT_GOTO:
2028                 goto_to_firm((goto_statement_t*) statement);
2029                 return;
2030         default:
2031                 break;
2032         }
2033         panic("Statement not implemented\n");
2034 }
2035
2036 static int get_function_n_local_vars(declaration_t *declaration)
2037 {
2038         (void) declaration;
2039         /* TODO */
2040         return 30;
2041 }
2042
2043 static void initialize_function_parameters(declaration_t *declaration)
2044 {
2045         ir_graph *irg         = current_ir_graph;
2046         ir_node  *args        = get_irg_args(irg);
2047         ir_node  *start_block = get_irg_start_block(irg);
2048
2049         int            n         = 0;
2050         declaration_t *parameter = declaration->context.declarations;
2051         for( ; parameter != NULL; parameter = parameter->next) {
2052                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2053                 type_t *type = parameter->type;
2054
2055                 bool needs_entity = parameter->address_taken;
2056                 if(type->type == TYPE_COMPOUND_STRUCT
2057                                 || type->type == TYPE_COMPOUND_UNION) {
2058                         needs_entity = true;
2059                 }
2060
2061                 if(needs_entity) {
2062                         panic("entities for function parameters not implemented yet");
2063                 }
2064
2065                 ir_mode *mode = get_ir_mode(parameter->type);
2066                 long     pn   = n;
2067                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2068                 ++n;
2069
2070                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2071                 parameter->v.value_number   = next_value_number_function;
2072                 ++next_value_number_function;
2073
2074                 set_value(parameter->v.value_number, proj);
2075         }
2076 }
2077
2078 static void create_function(declaration_t *declaration)
2079 {
2080         ir_entity *entity = get_function_entity(declaration);
2081
2082         if(declaration->init.statement == NULL)
2083                 return;
2084
2085         assert(imature_blocks == NULL);
2086         imature_blocks = NEW_ARR_F(ir_node*, 0);
2087
2088         int       n_local_vars = get_function_n_local_vars(declaration);
2089         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2090         ir_node  *first_block  = get_cur_block();
2091
2092         next_value_number_function = 0;
2093         initialize_function_parameters(declaration);
2094
2095         statement_to_firm(declaration->init.statement);
2096
2097         ir_node *end_block = get_irg_end_block(irg);
2098
2099         /* do we have a return statement yet? */
2100         if(get_cur_block() != NULL) {
2101                 assert(declaration->type->type == TYPE_FUNCTION);
2102                 const function_type_t* const func_type
2103                         = (const function_type_t*) declaration->type;
2104                 ir_node *ret;
2105                 if (func_type->result_type == type_void) {
2106                         ret = new_Return(get_store(), 0, NULL);
2107                 } else {
2108                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2109                         ir_node *      in[1];
2110                         // §5.1.2.2.3 main implicitly returns 0
2111                         if (strcmp(declaration->symbol->string, "main") == 0) {
2112                                 in[0] = new_Const(mode, get_mode_null(mode));
2113                         } else {
2114                                 in[0] = new_Unknown(mode);
2115                         }
2116                         ret = new_Return(get_store(), 1, in);
2117                 }
2118                 add_immBlock_pred(end_block, ret);
2119         }
2120
2121         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2122                 mature_immBlock(imature_blocks[i]);
2123         }
2124         DEL_ARR_F(imature_blocks);
2125         imature_blocks = NULL;
2126
2127         mature_immBlock(first_block);
2128         mature_immBlock(end_block);
2129
2130         irg_finalize_cons(irg);
2131
2132         /* finalize the frame type */
2133         ir_type *frame_type = get_irg_frame_type(irg);
2134         int      n          = get_compound_n_members(frame_type);
2135         int      align_all  = 4;
2136         int      offset     = 0;
2137         for(int i = 0; i < n; ++i) {
2138                 ir_entity *entity      = get_compound_member(frame_type, i);
2139                 ir_type   *entity_type = get_entity_type(entity);
2140
2141                 int align = get_type_alignment_bytes(entity_type);
2142                 if(align > align_all)
2143                         align_all = align;
2144                 int misalign = 0;
2145                 if(align > 0) {
2146                         misalign  = offset % align;
2147                         offset   += misalign;
2148                 }
2149
2150                 set_entity_offset(entity, offset);
2151                 offset += get_type_size_bytes(entity_type);
2152         }
2153         set_type_size_bytes(frame_type, offset);
2154         set_type_alignment_bytes(frame_type, align_all);
2155         set_type_state(frame_type, layout_fixed);
2156
2157         irg_vrfy(irg);
2158 }
2159
2160 static void create_global_variable(declaration_t *declaration)
2161 {
2162         ir_type   *global_type = get_glob_type();
2163         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2164                                   global_type);
2165
2166         ir_entity *entity = declaration->v.entity;
2167         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2168                 set_entity_visibility(entity, visibility_local);
2169         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2170                 set_entity_visibility(entity, visibility_external_allocated);
2171         } else {
2172                 set_entity_visibility(entity, visibility_external_visible);
2173         }
2174         current_ir_graph = get_const_code_irg();
2175         create_initializer(declaration);
2176 }
2177
2178 static void context_to_firm(context_t *context)
2179 {
2180         declaration_t *declaration = context->declarations;
2181         for( ; declaration != NULL; declaration = declaration->next) {
2182                 if(declaration->namespace != NAMESPACE_NORMAL)
2183                         continue;
2184                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2185                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2186                         continue;
2187                 if(declaration->symbol == NULL)
2188                         continue;
2189
2190                 type_t *type = declaration->type;
2191                 if(type->type == TYPE_FUNCTION) {
2192                         create_function(declaration);
2193                 } else {
2194                         create_global_variable(declaration);
2195                 }
2196         }
2197 }
2198
2199 void translation_unit_to_firm(translation_unit_t *unit)
2200 {
2201         /* remove me later TODO FIXME */
2202         (void) get_type_size;
2203
2204         /* just to be sure */
2205         continue_label      = NULL;
2206         break_label         = NULL;
2207         current_switch_cond = NULL;
2208
2209         context_to_firm(& unit->context);
2210 }