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->namespc != 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->namespc != 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         function_type_t *function_type;
 705         if (function->datatype->type == TYPE_POINTER) {
 706                 pointer_type_t *const ptr_type = (pointer_type_t*)function->datatype;
 707                 assert(ptr_type->points_to->type == TYPE_FUNCTION);
 708                 function_type = (function_type_t*)ptr_type->points_to;
 709         } else {
 710                 assert(function->datatype->type == TYPE_FUNCTION);
 711                 function_type = (function_type_t*)function->datatype;
 712         }
 713
 714         int              n_parameters = 0;
 715         call_argument_t *argument     = call->arguments;
 716         for( ; argument != NULL; argument = argument->next) {
 717                 ++n_parameters;
 718         }
 719
 720         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 721         ir_type *new_method_type = NULL;
 722         if(function_type->variadic || function_type->unspecified_parameters) {
 723                 /* we need to construct a new method type matching the call
 724                  * arguments... */
 725                 int n_res       = get_method_n_ress(ir_method_type);
 726                 new_method_type = new_type_method(unique_ident("calltype"),
 727                                                   n_parameters, n_res);
 728                 set_method_calling_convention(new_method_type,
 729                                get_method_calling_convention(ir_method_type));
 730                 set_method_additional_properties(new_method_type,
 731                                get_method_additional_properties(ir_method_type));
 732
 733                 for(int i = 0; i < n_res; ++i) {
 734                         set_method_res_type(new_method_type, i,
 735                                             get_method_res_type(ir_method_type, i));
 736                 }
 737         }
 738         ir_node *in[n_parameters];
 739
 740         argument = call->arguments;
 741         int n = 0;
 742         for( ; argument != NULL; argument = argument->next) {
 743                 expression_t *expression = argument->expression;
 744                 ir_node      *arg_node   = expression_to_firm(expression);
 745
 746                 in[n] = arg_node;
 747                 if(new_method_type != NULL) {
 748                         ir_type *irtype = get_ir_type(expression->datatype);
 749                         set_method_param_type(new_method_type, n, irtype);
 750                 }
 751
 752                 n++;
 753         }
 754         assert(n == n_parameters);
 755
 756         if(new_method_type != NULL)
 757                 ir_method_type = new_method_type;
 758
 759         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 760         ir_node  *store = get_store();
 761         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 762                                      ir_method_type);
 763         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 764         set_store(mem);
 765
 766         type_t  *result_type = function_type->result_type;
 767         ir_node *result      = NULL;
 768         if(result_type != type_void) {
 769                 ir_mode *mode    = get_ir_mode(result_type);
 770                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 771                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 772         }
 773
 774         return result;
 775 }
 776
 777 static ir_node *expression_to_addr(const expression_t *expression);
 778 static void create_condition_evaluation(const expression_t *expression,
 779                                         ir_node *true_block,
 780                                         ir_node *false_block);
 781
 782 static void set_value_for_expression(const expression_t *expression,
 783                                      ir_node *value)
 784 {
 785         if(expression->type == EXPR_REFERENCE) {
 786                 reference_expression_t *ref = (reference_expression_t*) expression;
 787
 788                 declaration_t *declaration = ref->declaration;
 789                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 790                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 791                         set_value(declaration->v.value_number, value);
 792                         return;
 793                 }
 794         }
 795
 796         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 797         ir_node  *addr      = expression_to_addr(expression);
 798         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 799         ir_node  *memory    = get_store();
 800         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 801         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 802         set_store(store_mem);
 803 }
 804
 805 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 806 {
 807         ir_mode *value_mode = get_irn_mode(value);
 808
 809         if(value_mode == dest_mode)
 810                 return value;
 811
 812         if(dest_mode == mode_b) {
 813                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 814                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 815                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 816                 return proj;
 817         }
 818
 819         return new_d_Conv(dbgi, value, dest_mode);
 820 }
 821
 822 static ir_node *create_incdec(const unary_expression_t *expression)
 823 {
 824         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 825         type_t       *type  = expression->expression.datatype;
 826         ir_mode      *mode  = get_ir_mode(type);
 827         expression_t *value = expression->value;
 828
 829         ir_node *value_node = expression_to_firm(value);
 830
 831         ir_node *offset;
 832         if(type->type == TYPE_POINTER) {
 833                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 834                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 835                 offset = new_Const_long(mode_Is, elem_size);
 836         } else {
 837                 assert(is_type_arithmetic(type));
 838                 offset = new_Const(mode, get_mode_one(mode));
 839         }
 840
 841         ir_node *new_value;
 842         switch(expression->type) {
 843         case UNEXPR_POSTFIX_INCREMENT: {
 844                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 845                 set_value_for_expression(value, new_value);
 846                 return value_node;
 847         }
 848         case UNEXPR_POSTFIX_DECREMENT: {
 849                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 850                 set_value_for_expression(value, new_value);
 851                 return value_node;
 852         }
 853         case UNEXPR_PREFIX_INCREMENT: {
 854                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 855                 set_value_for_expression(value, new_value);
 856                 return new_value;
 857         }
 858         case UNEXPR_PREFIX_DECREMENT: {
 859                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 860                 set_value_for_expression(value, new_value);
 861                 return new_value;
 862         }
 863         default:
 864                 panic("no incdec expr in create_incdec");
 865         }
 866
 867         return new_value;
 868 }
 869
 870 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 871 {
 872         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 873         type_t   *type = expression->expression.datatype;
 874
 875         if(expression->type == UNEXPR_TAKE_ADDRESS)
 876                 return expression_to_addr(expression->value);
 877
 878         const expression_t *value      = expression->value;
 879         ir_node            *value_node = expression_to_firm(value);
 880
 881         switch(expression->type) {
 882         case UNEXPR_NEGATE:
 883                 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
 884         case UNEXPR_PLUS:
 885                 return value_node;
 886         case UNEXPR_BITWISE_NEGATE:
 887                 return new_d_Not(dbgi, value_node, get_ir_mode(type));
 888         case UNEXPR_NOT: {
 889                 if(get_irn_mode(value_node) != mode_b) {
 890                         value_node = create_conv(dbgi, value_node, mode_b);
 891                 }
 892                 value_node = new_d_Not(dbgi, value_node, mode_b);
 893                 ir_mode *const mode = get_ir_mode(type);
 894                 if(mode != mode_b) {
 895                         value_node = create_conv(dbgi, value_node, mode);
 896                 }
 897                 return value_node;
 898         }
 899         case UNEXPR_DEREFERENCE:
 900                 return deref_address(type, value_node, dbgi);
 901         case UNEXPR_POSTFIX_INCREMENT:
 902         case UNEXPR_POSTFIX_DECREMENT:
 903         case UNEXPR_PREFIX_INCREMENT:
 904         case UNEXPR_PREFIX_DECREMENT:
 905                 return create_incdec(expression);
 906         case UNEXPR_CAST:
 907                 return create_conv(dbgi, value_node, get_ir_mode(type));
 908
 909         case UNEXPR_TAKE_ADDRESS:
 910         case UNEXPR_INVALID:
 911                 break;
 912         }
 913         panic("invalid UNEXPR type found");
 914 }
 915
 916 static long get_pnc(binary_expression_type_t type)
 917 {
 918         switch(type) {
 919         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 920         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 921         case BINEXPR_LESS:         return pn_Cmp_Lt;
 922         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 923         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 924         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 925         default:
 926                 break;
 927         }
 928         panic("trying to get pn_Cmp from non-comparison binexpr type");
 929 }
 930
 931 static ir_node *create_lazy_op(const binary_expression_t *expression)
 932 {
 933         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 934         type_t   *type = expression->expression.datatype;
 935         ir_mode  *mode = get_ir_mode(type);
 936
 937         ir_node *cur_block = get_cur_block();
 938
 939         ir_node *one_block = new_immBlock();
 940         ir_node *one       = new_Const(mode, get_mode_one(mode));
 941         ir_node *jmp_one   = new_d_Jmp(dbgi);
 942
 943         ir_node *zero_block = new_immBlock();
 944         ir_node *zero       = new_Const(mode, get_mode_null(mode));
 945         ir_node *jmp_zero   = new_d_Jmp(dbgi);
 946
 947         set_cur_block(cur_block);
 948         create_condition_evaluation((const expression_t*) expression,
 949                                     one_block, zero_block);
 950         mature_immBlock(one_block);
 951         mature_immBlock(zero_block);
 952
 953         ir_node *common_block = new_immBlock();
 954         add_immBlock_pred(common_block, jmp_one);
 955         add_immBlock_pred(common_block, jmp_zero);
 956         mature_immBlock(common_block);
 957
 958         ir_node *in[2] = { one, zero };
 959         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
 960
 961         return val;
 962 }
 963
 964 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 965                                             ir_node *right, ir_mode *mode);
 966
 967 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 968                                         create_arithmetic_func func)
 969 {
 970         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 971         ir_node  *left  = expression_to_firm(expression->left);
 972         ir_node  *right = expression_to_firm(expression->right);
 973         type_t   *type  = expression->right->datatype;
 974         /* be careful with the modes, because in arithmetic assign nodes only
 975          * the right operand has the mode of the arithmetic already */
 976         ir_mode  *mode  = get_ir_mode(type);
 977         left            = create_conv(dbgi, left, mode);
 978         ir_node  *res   = func(dbgi, left, right, mode);
 979
 980         return res;
 981 }
 982
 983 static ir_node *pointer_arithmetic(ir_node  *const pointer,
 984                                    ir_node  *      integer,
 985                                    type_t   *const type,
 986                                    dbg_info *const dbgi,
 987                                    const create_arithmetic_func func)
 988 {
 989         pointer_type_t *const pointer_type = (pointer_type_t*)type;
 990         type_t         *const points_to    = pointer_type->points_to;
 991         const unsigned        elem_size    = get_type_size(points_to);
 992
 993         assert(elem_size >= 1);
 994         if (elem_size > 1) {
 995                 integer             = create_conv(dbgi, integer, mode_Is);
 996                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
 997                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
 998                 integer = mul;
 999         }
1000
1001         ir_mode *const mode = get_ir_mode(type);
1002         return func(dbgi, pointer, integer, mode);
1003 }
1004
1005 static ir_node *create_arithmetic_assign_binop(
1006                 const binary_expression_t *expression, create_arithmetic_func func)
1007 {
1008         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1009         type_t   *const type = expression->expression.datatype;
1010         ir_node  *value;
1011
1012         if (type->type == TYPE_POINTER) {
1013                 ir_node        *const pointer = expression_to_firm(expression->left);
1014                 ir_node        *      integer = expression_to_firm(expression->right);
1015                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1016         } else {
1017                 value = create_arithmetic_binop(expression, func);
1018         }
1019
1020         ir_mode  *const mode = get_ir_mode(type);
1021         value = create_conv(dbgi, value, mode);
1022         set_value_for_expression(expression->left, value);
1023
1024         return value;
1025 }
1026
1027 static ir_node *create_add(const binary_expression_t *expression)
1028 {
1029         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1030         ir_node  *left  = expression_to_firm(expression->left);
1031         ir_node  *right = expression_to_firm(expression->right);
1032         type_t   *type  = expression->expression.datatype;
1033
1034         expression_t *expr_left  = expression->left;
1035         expression_t *expr_right = expression->right;
1036         type_t       *type_left  = skip_typeref(expr_left->datatype);
1037         type_t       *type_right = skip_typeref(expr_right->datatype);
1038
1039         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1040                 ir_mode *const mode = get_ir_mode(type);
1041                 return new_d_Add(dbgi, left, right, mode);
1042         }
1043
1044         if (type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1045                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1046         } else {
1047                 assert(type_right->type == TYPE_POINTER || type_right->type == TYPE_ARRAY);
1048                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1049         }
1050 }
1051
1052 static ir_node *create_sub(const binary_expression_t *expression)
1053 {
1054         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1055         expression_t *const expr_left  = expression->left;
1056         expression_t *const expr_right = expression->right;
1057         ir_node      *const left       = expression_to_firm(expr_left);
1058         ir_node      *const right      = expression_to_firm(expr_right);
1059         type_t       *const type       = expression->expression.datatype;
1060         type_t       *const type_left  = skip_typeref(expr_left->datatype);
1061         type_t       *const type_right = skip_typeref(expr_right->datatype);
1062
1063         if ((is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) ||
1064             (type_left->type == TYPE_POINTER && type_right->type == TYPE_POINTER)) {
1065                 ir_mode *const mode = get_ir_mode(type);
1066                 return new_d_Sub(dbgi, left, right, mode);
1067         }
1068
1069         assert(type_left->type == TYPE_POINTER);
1070         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1071 }
1072
1073 static ir_node *create_shift(const binary_expression_t *expression)
1074 {
1075         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1076         ir_node  *left  = expression_to_firm(expression->left);
1077         ir_node  *right = expression_to_firm(expression->right);
1078         type_t   *type  = expression->expression.datatype;
1079         ir_mode  *mode  = get_ir_mode(type);
1080
1081         /* firm always wants the shift count to be unsigned */
1082         right = create_conv(dbgi, right, mode_Iu);
1083
1084         ir_node *res;
1085
1086         switch(expression->type) {
1087         case BINEXPR_SHIFTLEFT:
1088                 res = new_d_Shl(dbgi, left, right, mode);
1089                 break;
1090         case BINEXPR_SHIFTRIGHT: {
1091                  expression_t *expr_left = expression->left;
1092                  type_t       *type_left = skip_typeref(expr_left->datatype);
1093
1094                  if(is_type_signed(type_left)) {
1095                         res = new_d_Shrs(dbgi, left, right, mode);
1096                  } else {
1097                          res = new_d_Shr(dbgi, left, right, mode);
1098                  }
1099                  break;
1100         }
1101         default:
1102                 panic("create shift op called for non-shift op");
1103         }
1104
1105         return res;
1106 }
1107
1108
1109 static ir_node *create_divmod(const binary_expression_t *expression)
1110 {
1111         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1112         ir_node  *left  = expression_to_firm(expression->left);
1113         ir_node  *right = expression_to_firm(expression->right);
1114         ir_node  *pin   = new_Pin(new_NoMem());
1115         type_t   *type  = expression->expression.datatype;
1116         ir_mode  *mode  = get_ir_mode(type);
1117         ir_node  *op;
1118         ir_node  *res;
1119
1120         switch (expression->type)  {
1121                 case BINEXPR_DIV:
1122                 case BINEXPR_DIV_ASSIGN:
1123                         if(mode_is_float(mode)) {
1124                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1125                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1126                         } else {
1127                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1128                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1129                         }
1130                         break;
1131
1132                 case BINEXPR_MOD:
1133                 case BINEXPR_MOD_ASSIGN:
1134                         assert(!mode_is_float(mode));
1135                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1136                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1137                         break;
1138
1139                 default: panic("unexpected binary expression type in create_divmod()");
1140         }
1141
1142         return res;
1143 }
1144
1145 static ir_node *create_arithmetic_assign_divmod(
1146                 const binary_expression_t *expression)
1147 {
1148         ir_node  *      value = create_divmod(expression);
1149         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1150         type_t   *const type  = expression->expression.datatype;
1151         ir_mode  *const mode  = get_ir_mode(type);
1152
1153         assert(type->type != TYPE_POINTER);
1154
1155         value = create_conv(dbgi, value, mode);
1156         set_value_for_expression(expression->left, value);
1157
1158         return value;
1159 }
1160
1161
1162 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1163 {
1164         binary_expression_type_t type = expression->type;
1165         switch(type) {
1166         case BINEXPR_EQUAL:
1167         case BINEXPR_NOTEQUAL:
1168         case BINEXPR_LESS:
1169         case BINEXPR_LESSEQUAL:
1170         case BINEXPR_GREATER:
1171         case BINEXPR_GREATEREQUAL: {
1172                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1173                 ir_node *left  = expression_to_firm(expression->left);
1174                 ir_node *right = expression_to_firm(expression->right);
1175                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1176                 long     pnc   = get_pnc(type);
1177                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1178                 return proj;
1179         }
1180         case BINEXPR_ASSIGN: {
1181                 ir_node *right = expression_to_firm(expression->right);
1182                 set_value_for_expression(expression->left, right);
1183                 return right;
1184         }
1185         case BINEXPR_ADD:
1186                 return create_add(expression);
1187         case BINEXPR_SUB:
1188                 return create_sub(expression);
1189         case BINEXPR_MUL:
1190                 return create_arithmetic_binop(expression, new_d_Mul);
1191         case BINEXPR_BITWISE_AND:
1192                 return create_arithmetic_binop(expression, new_d_And);
1193         case BINEXPR_BITWISE_OR:
1194                 return create_arithmetic_binop(expression, new_d_Or);
1195         case BINEXPR_BITWISE_XOR:
1196                 return create_arithmetic_binop(expression, new_d_Eor);
1197         case BINEXPR_SHIFTLEFT:
1198         case BINEXPR_SHIFTRIGHT:
1199                 return create_shift(expression);
1200         case BINEXPR_DIV:
1201         case BINEXPR_MOD:
1202                 return create_divmod(expression);
1203         case BINEXPR_LOGICAL_AND:
1204         case BINEXPR_LOGICAL_OR:
1205                 return create_lazy_op(expression);
1206         case BINEXPR_COMMA:
1207                 expression_to_firm(expression->left);
1208                 return expression_to_firm(expression->right);
1209         case BINEXPR_ADD_ASSIGN:
1210                 return create_arithmetic_assign_binop(expression, new_d_Add);
1211         case BINEXPR_SUB_ASSIGN:
1212                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1213         case BINEXPR_MUL_ASSIGN:
1214                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1215         case BINEXPR_DIV_ASSIGN:
1216                 return create_arithmetic_assign_divmod(expression);
1217         case BINEXPR_BITWISE_AND_ASSIGN:
1218                 return create_arithmetic_assign_binop(expression, new_d_And);
1219         case BINEXPR_BITWISE_OR_ASSIGN:
1220                 return create_arithmetic_assign_binop(expression, new_d_Or);
1221         case BINEXPR_BITWISE_XOR_ASSIGN:
1222                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1223         case BINEXPR_SHIFTLEFT_ASSIGN:
1224                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1225         case BINEXPR_SHIFTRIGHT_ASSIGN:
1226                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1227         default:
1228                 panic("TODO binexpr type");
1229         }
1230 }
1231
1232 static ir_node *array_access_addr(const array_access_expression_t *expression)
1233 {
1234         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1235
1236         ir_node *base_addr = expression_to_firm(expression->array_ref);
1237         ir_node *offset    = expression_to_firm(expression->index);
1238         offset             = create_conv(dbgi, offset, mode_Iu);
1239
1240         unsigned elem_size       = get_type_size(expression->expression.datatype);
1241         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1242         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1243                                              mode_Iu);
1244         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1245
1246         return result;
1247 }
1248
1249 static ir_node *array_access_to_firm(
1250                 const array_access_expression_t *expression)
1251 {
1252         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1253         ir_node  *addr = array_access_addr(expression);
1254         type_t   *type = expression->expression.datatype;
1255         return deref_address(type, addr, dbgi);
1256 }
1257
1258 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1259 {
1260         type_t *type = expression->type;
1261         if(type == NULL) {
1262                 type = expression->size_expression->datatype;
1263                 assert(type != NULL);
1264         }
1265
1266         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1267         unsigned  size      = get_type_size(type);
1268         ir_node  *size_node = new_Const_long(mode, size);
1269
1270         return size_node;
1271 }
1272
1273 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1274 {
1275         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1276
1277         ir_node *cur_block   = get_cur_block();
1278
1279         /* create the true block */
1280         ir_node *true_block  = new_immBlock();
1281
1282         ir_node *true_val = expression_to_firm(expression->true_expression);
1283         ir_node *true_jmp = new_Jmp();
1284
1285         /* create the false block */
1286         ir_node *false_block = new_immBlock();
1287
1288         ir_node *false_val = expression_to_firm(expression->false_expression);
1289         ir_node *false_jmp = new_Jmp();
1290
1291         /* create the condition evaluation */
1292         set_cur_block(cur_block);
1293         create_condition_evaluation(expression->condition, true_block, false_block);
1294         mature_immBlock(true_block);
1295         mature_immBlock(false_block);
1296
1297         /* create the common block */
1298         ir_node *common_block = new_immBlock();
1299         add_immBlock_pred(common_block, true_jmp);
1300         add_immBlock_pred(common_block, false_jmp);
1301         mature_immBlock(common_block);
1302
1303         ir_node *in[2] = { true_val, false_val };
1304         ir_mode *mode  = get_irn_mode(true_val);
1305         assert(get_irn_mode(false_val) == mode);
1306         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1307
1308         return val;
1309 }
1310
1311 static ir_node *select_addr(const select_expression_t *expression)
1312 {
1313         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1314
1315         ir_node *compound_addr = expression_to_firm(expression->compound);
1316
1317         declaration_t *entry = expression->compound_entry;
1318         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1319         ir_entity     *entity = entry->v.entity;
1320
1321         assert(entity != NULL);
1322
1323         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1324
1325         return sel;
1326 }
1327
1328 static ir_node *select_to_firm(const select_expression_t *expression)
1329 {
1330         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1331         ir_node  *addr = select_addr(expression);
1332         type_t   *type = skip_typeref(expression->expression.datatype);
1333         return deref_address(type, addr, dbgi);
1334 }
1335
1336 static ir_node *dereference_addr(const unary_expression_t *const expression)
1337 {
1338         assert(expression->type == UNEXPR_DEREFERENCE);
1339         return expression_to_firm(expression->value);
1340 }
1341
1342 static ir_node *expression_to_addr(const expression_t *expression)
1343 {
1344         switch(expression->type) {
1345         case EXPR_REFERENCE:
1346                 return reference_addr((const reference_expression_t*) expression);
1347         case EXPR_ARRAY_ACCESS:
1348                 return array_access_addr((const array_access_expression_t*) expression);
1349         case EXPR_SELECT:
1350                 return select_addr((const select_expression_t*) expression);
1351         case EXPR_UNARY: {
1352                 const unary_expression_t *const unary_expr =
1353                         (const unary_expression_t*)expression;
1354                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1355                         return dereference_addr(unary_expr);
1356                 }
1357                 break;
1358         }
1359         default:
1360                 break;
1361         }
1362         panic("trying to get address of non-lvalue");
1363 }
1364
1365 static ir_node *_expression_to_firm(const expression_t *expression)
1366 {
1367         switch(expression->type) {
1368         case EXPR_CONST:
1369                 return const_to_firm((const const_t*) expression);
1370         case EXPR_STRING_LITERAL:
1371                 return string_literal_to_firm((const string_literal_t*) expression);
1372         case EXPR_REFERENCE:
1373                 return reference_expression_to_firm(
1374                                 (const reference_expression_t*) expression);
1375         case EXPR_CALL:
1376                 return call_expression_to_firm((const call_expression_t*) expression);
1377         case EXPR_UNARY:
1378                 return unary_expression_to_firm((const unary_expression_t*) expression);
1379         case EXPR_BINARY:
1380                 return binary_expression_to_firm(
1381                                 (const binary_expression_t*) expression);
1382         case EXPR_ARRAY_ACCESS:
1383                 return array_access_to_firm(
1384                                 (const array_access_expression_t*) expression);
1385         case EXPR_SIZEOF:
1386                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1387         case EXPR_CONDITIONAL:
1388                 return conditional_to_firm((const conditional_expression_t*)expression);
1389         case EXPR_SELECT:
1390                 return select_to_firm((const select_expression_t*) expression);
1391         case EXPR_FUNCTION:
1392         case EXPR_OFFSETOF:
1393         case EXPR_PRETTY_FUNCTION:
1394         case EXPR_VA_ARG:
1395         case EXPR_STATEMENT:
1396         case EXPR_BUILTIN_SYMBOL:
1397                 panic("unimplemented expression found");
1398
1399         case EXPR_UNKNOWN:
1400         case EXPR_INVALID:
1401                 break;
1402         }
1403         panic("invalid expression found");
1404 }
1405
1406 static ir_node *expression_to_firm(const expression_t *expression)
1407 {
1408         ir_node *res = _expression_to_firm(expression);
1409
1410         if(res != NULL && get_irn_mode(res) == mode_b) {
1411                 ir_mode *mode = get_ir_mode(expression->datatype);
1412                 res           = create_conv(NULL, res, mode);
1413         }
1414
1415         return res;
1416 }
1417
1418 static ir_node *expression_to_modeb(const expression_t *expression)
1419 {
1420         ir_node *res = _expression_to_firm(expression);
1421         res          = create_conv(NULL, res, mode_b);
1422
1423         return res;
1424 }
1425
1426 /**
1427  * create a short-circuit expression evaluation that tries to construct
1428  * efficient control flow structures for &&, || and ! expressions
1429  */
1430 static void create_condition_evaluation(const expression_t *expression,
1431                                         ir_node *true_block,
1432                                         ir_node *false_block)
1433 {
1434         switch(expression->type) {
1435         case EXPR_UNARY: {
1436                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1437                 if(unary_expression->type == UNEXPR_NOT) {
1438                         create_condition_evaluation(unary_expression->value, false_block,
1439                                                     true_block);
1440                         return;
1441                 }
1442                 break;
1443         }
1444         case EXPR_BINARY: {
1445                 binary_expression_t *binary_expression
1446                         = (binary_expression_t*) expression;
1447                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1448                         ir_node *cur_block   = get_cur_block();
1449                         ir_node *extra_block = new_immBlock();
1450                         set_cur_block(cur_block);
1451                         create_condition_evaluation(binary_expression->left, extra_block,
1452                                                     false_block);
1453                         mature_immBlock(extra_block);
1454                         set_cur_block(extra_block);
1455                         create_condition_evaluation(binary_expression->right, true_block,
1456                                                     false_block);
1457                         return;
1458                 }
1459                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1460                         ir_node *cur_block   = get_cur_block();
1461                         ir_node *extra_block = new_immBlock();
1462                         set_cur_block(cur_block);
1463                         create_condition_evaluation(binary_expression->left, true_block,
1464                                                     extra_block);
1465                         mature_immBlock(extra_block);
1466                         set_cur_block(extra_block);
1467                         create_condition_evaluation(binary_expression->right, true_block,
1468                                                     false_block);
1469                         return;
1470                 }
1471                 break;
1472         }
1473         default:
1474                 break;
1475         }
1476
1477         dbg_info *dbgi       = get_dbg_info(&expression->source_position);
1478         ir_node  *condition  = expression_to_modeb(expression);
1479         ir_node  *cond       = new_d_Cond(dbgi, condition);
1480         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1481         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1482
1483         add_immBlock_pred(true_block, true_proj);
1484         add_immBlock_pred(false_block, false_proj);
1485
1486         set_cur_block(NULL);
1487 }
1488
1489 static void statement_to_firm(statement_t *statement);
1490
1491 static void return_statement_to_firm(return_statement_t *statement)
1492 {
1493         if(get_cur_block() == NULL)
1494                 return;
1495
1496         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1497         ir_node  *ret;
1498
1499         if(statement->return_value != NULL) {
1500                 ir_node *retval = expression_to_firm(statement->return_value);
1501                 ir_node *in[1];
1502
1503                 in[0] = retval;
1504                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1505         } else {
1506                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1507         }
1508         ir_node *end_block = get_irg_end_block(current_ir_graph);
1509         add_immBlock_pred(end_block, ret);
1510
1511         set_cur_block(NULL);
1512 }
1513
1514 static void compound_statement_to_firm(compound_statement_t *compound)
1515 {
1516         statement_t *statement = compound->statements;
1517         for( ; statement != NULL; statement = statement->next) {
1518                 //context2firm(&statement->context);
1519                 statement_to_firm(statement);
1520         }
1521 }
1522
1523 static void expression_statement_to_firm(expression_statement_t *statement)
1524 {
1525         if(get_cur_block() == NULL)
1526                 return;
1527
1528         expression_to_firm(statement->expression);
1529 }
1530
1531 static void if_statement_to_firm(if_statement_t *statement)
1532 {
1533         ir_node *cur_block = get_cur_block();
1534
1535         ir_node *fallthrough_block = new_immBlock();
1536
1537         /* the true (blocks) */
1538         ir_node *true_block;
1539         if (statement->true_statement != NULL) {
1540                 true_block = new_immBlock();
1541                 statement_to_firm(statement->true_statement);
1542                 if(get_cur_block() != NULL) {
1543                         ir_node *jmp = new_Jmp();
1544                         add_immBlock_pred(fallthrough_block, jmp);
1545                 }
1546         } else {
1547                 true_block = fallthrough_block;
1548         }
1549
1550         /* the false (blocks) */
1551         ir_node *false_block;
1552         if(statement->false_statement != NULL) {
1553                 false_block = new_immBlock();
1554
1555                 statement_to_firm(statement->false_statement);
1556                 if(get_cur_block() != NULL) {
1557                         ir_node *jmp = new_Jmp();
1558                         add_immBlock_pred(fallthrough_block, jmp);
1559                 }
1560         } else {
1561                 false_block = fallthrough_block;
1562         }
1563
1564         /* create the condition */
1565         if(cur_block != NULL) {
1566                 set_cur_block(cur_block);
1567                 create_condition_evaluation(statement->condition, true_block,
1568                                             false_block);
1569         }
1570
1571         mature_immBlock(true_block);
1572         if(false_block != fallthrough_block) {
1573                 mature_immBlock(false_block);
1574         }
1575         mature_immBlock(fallthrough_block);
1576
1577         set_cur_block(fallthrough_block);
1578 }
1579
1580 static void while_statement_to_firm(while_statement_t *statement)
1581 {
1582         ir_node *jmp = NULL;
1583         if(get_cur_block() != NULL) {
1584                 jmp = new_Jmp();
1585         }
1586
1587         /* create the header block */
1588         ir_node *header_block = new_immBlock();
1589         if(jmp != NULL) {
1590                 add_immBlock_pred(header_block, jmp);
1591         }
1592
1593         /* the false block */
1594         ir_node *false_block = new_immBlock();
1595
1596         /* the loop body */
1597         ir_node *body_block;
1598         if (statement->body != NULL) {
1599                 ir_node *old_continue_label = continue_label;
1600                 ir_node *old_break_label    = break_label;
1601                 continue_label              = header_block;
1602                 break_label                 = false_block;
1603
1604                 body_block = new_immBlock();
1605                 statement_to_firm(statement->body);
1606
1607                 assert(continue_label == header_block);
1608                 assert(break_label    == false_block);
1609                 continue_label = old_continue_label;
1610                 break_label    = old_break_label;
1611
1612                 if(get_cur_block() != NULL) {
1613                         ir_node *jmp = new_Jmp();
1614                         add_immBlock_pred(header_block, jmp);
1615                 }
1616         } else {
1617                 body_block = header_block;
1618         }
1619
1620         /* create the condition */
1621         set_cur_block(header_block);
1622
1623         create_condition_evaluation(statement->condition, body_block, false_block);
1624         mature_immBlock(body_block);
1625         mature_immBlock(false_block);
1626         mature_immBlock(header_block);
1627
1628         set_cur_block(false_block);
1629 }
1630
1631 static void do_while_statement_to_firm(do_while_statement_t *statement)
1632 {
1633         ir_node *jmp = NULL;
1634         if(get_cur_block() != NULL) {
1635                 jmp = new_Jmp();
1636         }
1637
1638         /* create the header block */
1639         ir_node *header_block = new_immBlock();
1640
1641         /* the false block */
1642         ir_node *false_block = new_immBlock();
1643
1644         /* the loop body */
1645         ir_node *body_block = new_immBlock();
1646         if(jmp != NULL) {
1647                 add_immBlock_pred(body_block, jmp);
1648         }
1649
1650         if (statement->body != NULL) {
1651                 ir_node *old_continue_label = continue_label;
1652                 ir_node *old_break_label    = break_label;
1653                 continue_label              = header_block;
1654                 break_label                 = false_block;
1655
1656                 statement_to_firm(statement->body);
1657
1658                 assert(continue_label == header_block);
1659                 assert(break_label    == false_block);
1660                 continue_label = old_continue_label;
1661                 break_label    = old_break_label;
1662
1663                 if (get_cur_block() == NULL) {
1664                         mature_immBlock(header_block);
1665                         mature_immBlock(body_block);
1666                         mature_immBlock(false_block);
1667                         return;
1668                 }
1669         }
1670
1671         ir_node *body_jmp = new_Jmp();
1672         add_immBlock_pred(header_block, body_jmp);
1673         mature_immBlock(header_block);
1674
1675         /* create the condition */
1676         set_cur_block(header_block);
1677
1678         create_condition_evaluation(statement->condition, body_block, false_block);
1679         mature_immBlock(body_block);
1680         mature_immBlock(false_block);
1681         mature_immBlock(header_block);
1682
1683         set_cur_block(false_block);
1684 }
1685
1686 static void for_statement_to_firm(for_statement_t *statement)
1687 {
1688         ir_node *jmp = NULL;
1689         if (get_cur_block() != NULL) {
1690                 if(statement->initialisation != NULL) {
1691                         expression_to_firm(statement->initialisation);
1692                 }
1693                 jmp = new_Jmp();
1694         }
1695
1696         /* create the step block */
1697         ir_node *const step_block = new_immBlock();
1698         if (statement->step != NULL) {
1699                 expression_to_firm(statement->step);
1700         }
1701         ir_node *const step_jmp = new_Jmp();
1702
1703         /* create the header block */
1704         ir_node *const header_block = new_immBlock();
1705         if (jmp != NULL) {
1706                 add_immBlock_pred(header_block, jmp);
1707         }
1708         add_immBlock_pred(header_block, step_jmp);
1709
1710         /* the false block */
1711         ir_node *const false_block = new_immBlock();
1712
1713         /* the loop body */
1714         ir_node * body_block;
1715         if (statement->body != NULL) {
1716                 ir_node *const old_continue_label = continue_label;
1717                 ir_node *const old_break_label    = break_label;
1718                 continue_label = step_block;
1719                 break_label    = false_block;
1720
1721                 body_block = new_immBlock();
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         } else {
1734                 body_block = step_block;
1735         }
1736
1737         /* create the condition */
1738         set_cur_block(header_block);
1739         if (statement->condition != NULL) {
1740                 create_condition_evaluation(statement->condition, body_block,
1741                                             false_block);
1742         } else {
1743                 keep_alive(header_block);
1744                 ir_node *jmp = new_Jmp();
1745                 add_immBlock_pred(body_block, jmp);
1746         }
1747
1748         mature_immBlock(body_block);
1749         mature_immBlock(false_block);
1750         mature_immBlock(step_block);
1751         mature_immBlock(header_block);
1752         mature_immBlock(false_block);
1753
1754         set_cur_block(false_block);
1755 }
1756
1757 static void create_declaration_entity(declaration_t *declaration,
1758                                       declaration_type_t declaration_type,
1759                                       ir_type *parent_type)
1760 {
1761         ident     *id     = new_id_from_str(declaration->symbol->string);
1762         ir_type   *irtype = get_ir_type(declaration->type);
1763         ir_entity *entity = new_entity(parent_type, id, irtype);
1764         set_entity_ld_ident(entity, id);
1765
1766         declaration->declaration_type = declaration_type;
1767         declaration->v.entity         = entity;
1768         set_entity_variability(entity, variability_uninitialized);
1769         /* TODO: visibility? */
1770 }
1771
1772 static void create_initializer(declaration_t *declaration)
1773 {
1774         initializer_t *initializer = declaration->init.initializer;
1775         if(initializer == NULL)
1776                 return;
1777
1778         if(initializer->type == INITIALIZER_VALUE) {
1779                 assert(initializer->designator == NULL);
1780                 assert(initializer->next == NULL);
1781                 ir_node *init_node = expression_to_firm(initializer->v.value);
1782
1783                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1784                         set_value(declaration->v.value_number, init_node);
1785                 } else {
1786                         ir_entity *entity = declaration->v.entity;
1787
1788                         set_entity_variability(entity, variability_initialized);
1789                         set_atomic_ent_value(entity, init_node);
1790                 }
1791         } else {
1792                 assert(initializer->type == INITIALIZER_LIST);
1793                 panic("list initializer not supported yet");
1794         }
1795 }
1796
1797 static void create_local_variable(declaration_t *declaration)
1798 {
1799         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1800
1801         bool needs_entity = declaration->address_taken;
1802         type_t *type = skip_typeref(declaration->type);
1803
1804         if(type->type == TYPE_ARRAY
1805                         || type->type == TYPE_COMPOUND_STRUCT
1806                         || type->type == TYPE_COMPOUND_UNION) {
1807                 needs_entity = true;
1808         }
1809
1810         if(needs_entity) {
1811                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1812                 create_declaration_entity(declaration,
1813                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1814                                           frame_type);
1815         } else {
1816                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1817                 declaration->v.value_number   = next_value_number_function;
1818                 ++next_value_number_function;
1819         }
1820
1821         create_initializer(declaration);
1822 }
1823
1824 static void declaration_statement_to_firm(declaration_statement_t *statement)
1825 {
1826         declaration_t *declaration = statement->declarations_begin;
1827         declaration_t *end         = statement->declarations_end->next;
1828         for( ; declaration != end; declaration = declaration->next) {
1829                 type_t *type = declaration->type;
1830
1831                 switch(declaration->storage_class) {
1832                 case STORAGE_CLASS_TYPEDEF:
1833                         continue;
1834                 case STORAGE_CLASS_STATIC:
1835                         panic("static local vars not implemented yet");
1836                 case STORAGE_CLASS_ENUM_ENTRY:
1837                         panic("enum entry declaration in local block found");
1838                 case STORAGE_CLASS_EXTERN:
1839                         panic("extern declaration in local block found");
1840                 case STORAGE_CLASS_NONE:
1841                 case STORAGE_CLASS_AUTO:
1842                 case STORAGE_CLASS_REGISTER:
1843                         if(type->type == TYPE_FUNCTION) {
1844                                 panic("nested functions not supported yet");
1845                         } else {
1846                                 create_local_variable(declaration);
1847                         }
1848                         continue;
1849                 }
1850                 panic("invalid storage class found");
1851         }
1852 }
1853
1854 static void create_jump_statement(const statement_t *statement,
1855                                   ir_node *target_block)
1856 {
1857         if(get_cur_block() == NULL)
1858                 return;
1859
1860         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1861         ir_node  *jump = new_d_Jmp(dbgi);
1862         add_immBlock_pred(target_block, jump);
1863
1864         set_cur_block(NULL);
1865 }
1866
1867 static void switch_statement_to_firm(const switch_statement_t *statement)
1868 {
1869         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1870
1871         ir_node *expression  = expression_to_firm(statement->expression);
1872         ir_node *cond        = new_d_Cond(dbgi, expression);
1873         ir_node *break_block = new_immBlock();
1874
1875         set_cur_block(NULL);
1876
1877         ir_node *const old_switch_cond       = current_switch_cond;
1878         ir_node *const old_break_label       = break_label;
1879         const bool     old_saw_default_label = saw_default_label;
1880         current_switch_cond                  = cond;
1881         break_label                          = break_block;
1882
1883         statement_to_firm(statement->body);
1884
1885         if(get_cur_block() != NULL) {
1886                 ir_node *jmp = new_Jmp();
1887                 add_immBlock_pred(break_block, jmp);
1888         }
1889
1890         if (!saw_default_label) {
1891                 set_cur_block(get_nodes_block(cond));
1892                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
1893                                                         MAGIC_DEFAULT_PN_NUMBER);
1894                 add_immBlock_pred(break_block, proj);
1895         }
1896
1897         assert(current_switch_cond == cond);
1898         assert(break_label         == break_block);
1899         current_switch_cond = old_switch_cond;
1900         break_label         = old_break_label;
1901         saw_default_label   = old_saw_default_label;
1902
1903         mature_immBlock(break_block);
1904         set_cur_block(break_block);
1905 }
1906
1907 static long fold_constant(const expression_t *expression)
1908 {
1909         ir_graph *old_current_ir_graph = current_ir_graph;
1910         current_ir_graph = get_const_code_irg();
1911
1912         ir_node *cnst = expression_to_firm(expression);
1913         if(!is_Const(cnst)) {
1914                 panic("couldn't fold constantl");
1915         }
1916         tarval *tv = get_Const_tarval(cnst);
1917         if(!tarval_is_long(tv)) {
1918                 panic("folded constant not an integer");
1919         }
1920
1921         long res = get_tarval_long(tv);
1922
1923         current_ir_graph = old_current_ir_graph;
1924         return res;
1925 }
1926
1927 static void case_label_to_firm(const case_label_statement_t *statement)
1928 {
1929         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1930
1931         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
1932
1933         /* let's create a node and hope firm constant folding creates a Const
1934          * node... */
1935         ir_node *proj;
1936         set_cur_block(get_nodes_block(current_switch_cond));
1937         if(statement->expression) {
1938                 long pn = fold_constant(statement->expression);
1939                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1940                         /* oops someone detected our cheating... */
1941                         panic("magic default pn used");
1942                 }
1943                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1944         } else {
1945                 saw_default_label = true;
1946                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1947                                          MAGIC_DEFAULT_PN_NUMBER);
1948         }
1949
1950         ir_node *block = new_immBlock();
1951         if (fallthrough != NULL) {
1952                 add_immBlock_pred(block, fallthrough);
1953         }
1954         add_immBlock_pred(block, proj);
1955         mature_immBlock(block);
1956 }
1957
1958 static ir_node *get_label_block(declaration_t *label)
1959 {
1960         assert(label->namespc == NAMESPACE_LABEL);
1961
1962         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1963                 return label->v.block;
1964         }
1965         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1966
1967         ir_node *old_cur_block = get_cur_block();
1968         ir_node *block         = new_immBlock();
1969         set_cur_block(old_cur_block);
1970
1971         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1972         label->v.block          = block;
1973
1974         ARR_APP1(ir_node *, imature_blocks, block);
1975
1976         return block;
1977 }
1978
1979 static void label_to_firm(const label_statement_t *statement)
1980 {
1981         ir_node *block = get_label_block(statement->label);
1982
1983         if(get_cur_block() != NULL) {
1984                 ir_node *jmp = new_Jmp();
1985                 add_immBlock_pred(block, jmp);
1986         }
1987
1988         set_cur_block(block);
1989         keep_alive(block);
1990
1991         statement_to_firm(statement->label_statement);
1992 }
1993
1994 static void goto_to_firm(const goto_statement_t *statement)
1995 {
1996         if(get_cur_block() == NULL)
1997                 return;
1998
1999         ir_node *block = get_label_block(statement->label);
2000         ir_node *jmp   = new_Jmp();
2001         add_immBlock_pred(block, jmp);
2002
2003         set_cur_block(NULL);
2004 }
2005
2006 static void statement_to_firm(statement_t *statement)
2007 {
2008         switch(statement->type) {
2009         case STATEMENT_COMPOUND:
2010                 compound_statement_to_firm((compound_statement_t*) statement);
2011                 return;
2012         case STATEMENT_RETURN:
2013                 return_statement_to_firm((return_statement_t*) statement);
2014                 return;
2015         case STATEMENT_EXPRESSION:
2016                 expression_statement_to_firm((expression_statement_t*) statement);
2017                 return;
2018         case STATEMENT_IF:
2019                 if_statement_to_firm((if_statement_t*) statement);
2020                 return;
2021         case STATEMENT_WHILE:
2022                 while_statement_to_firm((while_statement_t*) statement);
2023                 return;
2024         case STATEMENT_DO_WHILE:
2025                 do_while_statement_to_firm((do_while_statement_t*) statement);
2026                 return;
2027         case STATEMENT_DECLARATION:
2028                 declaration_statement_to_firm((declaration_statement_t*) statement);
2029                 return;
2030         case STATEMENT_BREAK:
2031                 create_jump_statement(statement, break_label);
2032                 return;
2033         case STATEMENT_CONTINUE:
2034                 create_jump_statement(statement, continue_label);
2035                 return;
2036         case STATEMENT_SWITCH:
2037                 switch_statement_to_firm((switch_statement_t*) statement);
2038                 return;
2039         case STATEMENT_CASE_LABEL:
2040                 case_label_to_firm((case_label_statement_t*) statement);
2041                 return;
2042         case STATEMENT_FOR:
2043                 for_statement_to_firm((for_statement_t*) statement);
2044                 return;
2045         case STATEMENT_LABEL:
2046                 label_to_firm((label_statement_t*) statement);
2047                 return;
2048         case STATEMENT_GOTO:
2049                 goto_to_firm((goto_statement_t*) statement);
2050                 return;
2051         default:
2052                 break;
2053         }
2054         panic("Statement not implemented\n");
2055 }
2056
2057 static int get_function_n_local_vars(declaration_t *declaration)
2058 {
2059         (void) declaration;
2060         /* TODO */
2061         return 30;
2062 }
2063
2064 static void initialize_function_parameters(declaration_t *declaration)
2065 {
2066         ir_graph *irg         = current_ir_graph;
2067         ir_node  *args        = get_irg_args(irg);
2068         ir_node  *start_block = get_irg_start_block(irg);
2069
2070         int            n         = 0;
2071         declaration_t *parameter = declaration->context.declarations;
2072         for( ; parameter != NULL; parameter = parameter->next) {
2073                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2074                 type_t *type = parameter->type;
2075
2076                 bool needs_entity = parameter->address_taken;
2077                 if(type->type == TYPE_COMPOUND_STRUCT
2078                                 || type->type == TYPE_COMPOUND_UNION) {
2079                         needs_entity = true;
2080                 }
2081
2082                 if(needs_entity) {
2083                         panic("entities for function parameters not implemented yet");
2084                 }
2085
2086                 ir_mode *mode = get_ir_mode(parameter->type);
2087                 long     pn   = n;
2088                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2089                 ++n;
2090
2091                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2092                 parameter->v.value_number   = next_value_number_function;
2093                 ++next_value_number_function;
2094
2095                 set_value(parameter->v.value_number, proj);
2096         }
2097 }
2098
2099 static void create_function(declaration_t *declaration)
2100 {
2101         ir_entity *entity = get_function_entity(declaration);
2102
2103         if(declaration->init.statement == NULL)
2104                 return;
2105
2106         assert(imature_blocks == NULL);
2107         imature_blocks = NEW_ARR_F(ir_node*, 0);
2108
2109         int       n_local_vars = get_function_n_local_vars(declaration);
2110         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2111         ir_node  *first_block  = get_cur_block();
2112
2113         next_value_number_function = 0;
2114         initialize_function_parameters(declaration);
2115
2116         statement_to_firm(declaration->init.statement);
2117
2118         ir_node *end_block = get_irg_end_block(irg);
2119
2120         /* do we have a return statement yet? */
2121         if(get_cur_block() != NULL) {
2122                 assert(declaration->type->type == TYPE_FUNCTION);
2123                 const function_type_t* const func_type
2124                         = (const function_type_t*) declaration->type;
2125                 ir_node *ret;
2126                 if (func_type->result_type == type_void) {
2127                         ret = new_Return(get_store(), 0, NULL);
2128                 } else {
2129                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2130                         ir_node *      in[1];
2131                         // §5.1.2.2.3 main implicitly returns 0
2132                         if (strcmp(declaration->symbol->string, "main") == 0) {
2133                                 in[0] = new_Const(mode, get_mode_null(mode));
2134                         } else {
2135                                 in[0] = new_Unknown(mode);
2136                         }
2137                         ret = new_Return(get_store(), 1, in);
2138                 }
2139                 add_immBlock_pred(end_block, ret);
2140         }
2141
2142         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2143                 mature_immBlock(imature_blocks[i]);
2144         }
2145         DEL_ARR_F(imature_blocks);
2146         imature_blocks = NULL;
2147
2148         mature_immBlock(first_block);
2149         mature_immBlock(end_block);
2150
2151         irg_finalize_cons(irg);
2152
2153         /* finalize the frame type */
2154         ir_type *frame_type = get_irg_frame_type(irg);
2155         int      n          = get_compound_n_members(frame_type);
2156         int      align_all  = 4;
2157         int      offset     = 0;
2158         for(int i = 0; i < n; ++i) {
2159                 ir_entity *entity      = get_compound_member(frame_type, i);
2160                 ir_type   *entity_type = get_entity_type(entity);
2161
2162                 int align = get_type_alignment_bytes(entity_type);
2163                 if(align > align_all)
2164                         align_all = align;
2165                 int misalign = 0;
2166                 if(align > 0) {
2167                         misalign  = offset % align;
2168                         offset   += misalign;
2169                 }
2170
2171                 set_entity_offset(entity, offset);
2172                 offset += get_type_size_bytes(entity_type);
2173         }
2174         set_type_size_bytes(frame_type, offset);
2175         set_type_alignment_bytes(frame_type, align_all);
2176         set_type_state(frame_type, layout_fixed);
2177
2178         irg_vrfy(irg);
2179 }
2180
2181 static void create_global_variable(declaration_t *declaration)
2182 {
2183         ir_type   *global_type = get_glob_type();
2184         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2185                                   global_type);
2186
2187         ir_entity *entity = declaration->v.entity;
2188         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2189                 set_entity_visibility(entity, visibility_local);
2190         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2191                 set_entity_visibility(entity, visibility_external_allocated);
2192         } else {
2193                 set_entity_visibility(entity, visibility_external_visible);
2194         }
2195         current_ir_graph = get_const_code_irg();
2196         create_initializer(declaration);
2197 }
2198
2199 static void context_to_firm(context_t *context)
2200 {
2201         declaration_t *declaration = context->declarations;
2202         for( ; declaration != NULL; declaration = declaration->next) {
2203                 if(declaration->namespc != NAMESPACE_NORMAL)
2204                         continue;
2205                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2206                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2207                         continue;
2208                 if(declaration->symbol == NULL)
2209                         continue;
2210
2211                 type_t *type = declaration->type;
2212                 if(type->type == TYPE_FUNCTION) {
2213                         create_function(declaration);
2214                 } else {
2215                         create_global_variable(declaration);
2216                 }
2217         }
2218 }
2219
2220 void translation_unit_to_firm(translation_unit_t *unit)
2221 {
2222         /* remove me later TODO FIXME */
2223         (void) get_type_size;
2224
2225         /* just to be sure */
2226         continue_label      = NULL;
2227         break_label         = NULL;
2228         current_switch_cond = NULL;
2229
2230         context_to_firm(& unit->context);
2231 }