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
   8 #include <libfirm/firm.h>
   9 #include <libfirm/adt/obst.h>
  10
  11 #include "adt/error.h"
  12 #include "token_t.h"
  13 #include "type_t.h"
  14 #include "ast_t.h"
  15
  16 static ir_type *ir_type_const_char;
  17 static ir_type *ir_type_void;
  18 static ir_type *ir_type_int;
  19 static ir_type *ir_type_void_ptr;
  20
  21 static type_t *type_const_char;
  22 static type_t *type_void;
  23 static type_t *type_int;
  24
  25 typedef enum declaration_type_t {
  26         DECLARATION_TYPE_UNKNOWN,
  27         DECLARATION_TYPE_FUNCTION,
  28         DECLARATION_TYPE_GLOBAL_VARIABLE,
  29         DECLARATION_TYPE_PARAMETER,
  30         DECLARATION_TYPE_PARAMETER_ENTITY,
  31         DECLARATION_TYPE_LOCAL_VARIABLE,
  32         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  33         DECLARATION_TYPE_COMPOUND_MEMBER
  34 } declaration_type_t;
  35
  36 typedef struct type2firm_env_t type2firm_env_t;
  37 struct type2firm_env_t {
  38         int can_cache;       /* nonzero if type can safely be cached because
  39                                 no typevariables are in the hierarchy */
  40 };
  41
  42 static ir_type *_get_ir_type(type2firm_env_t *env, type_t *type);
  43 static ir_type *get_ir_type(type_t *type);
  44
  45 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  46 {
  47         (void) pos;
  48 #if 0
  49         const declaration_t *declaration = & value_numbers[pos]->declaration;
  50
  51         print_warning_prefix(declaration->source_position);
  52         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  53                         declaration->symbol->string);
  54 #endif
  55         fprintf(stderr, "Some variable might be used uninitialized\n");
  56         return new_r_Unknown(irg, mode);
  57 }
  58
  59 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  60 {
  61         const source_position_t *pos = (const source_position_t*) dbg;
  62         if(pos == NULL)
  63                 return 0;
  64         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  65                                    pos->linenr);
  66 }
  67
  68 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  69 {
  70         const source_position_t *pos = (const source_position_t*) dbg;
  71         if(pos == NULL)
  72                 return NULL;
  73         if(line != NULL)
  74                 *line = pos->linenr;
  75         return pos->input_name;
  76 }
  77
  78 void init_ast2firm(void)
  79 {
  80         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  81         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  82         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  83
  84         ir_type_int        = get_ir_type(type_int);
  85         ir_type_const_char = get_ir_type(type_const_char);
  86         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  87                                                        type in firm */
  88         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  89                                               ir_type_void, mode_P_data);
  90
  91         type_void->firm_type = ir_type_void;
  92 }
  93
  94 void exit_ast2firm(void)
  95 {
  96 }
  97
  98 static unsigned unique_id = 0;
  99
 100 static ident *unique_ident(const char *tag)
 101 {
 102         char buf[256];
 103
 104         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 105         unique_id++;
 106         return new_id_from_str(buf);
 107 }
 108
 109 #if 0
 110 static symbol_t *unique_symbol(const char *tag)
 111 {
 112         obstack_printf(&symbol_obstack, "%s.%d", tag, unique_id);
 113         unique_id++;
 114
 115         const char *string = obstack_finish(&symbol_obstack);
 116         symbol_t   *symbol = symbol_table_insert(string);
 117
 118         assert(symbol->string == string);
 119
 120         return symbol;
 121 }
 122 #endif
 123
 124 static type_t *skip_typeref(type_t *type)
 125 {
 126         while(1) {
 127                 switch(type->type) {
 128                 case TYPE_TYPEDEF: {
 129                         const typedef_type_t *typedef_type = (const typedef_type_t*) type;
 130                         type = typedef_type->declaration->type;
 131                         continue;
 132                 }
 133                 case TYPE_TYPEOF: {
 134                         const typeof_type_t *typeof_type = (const typeof_type_t *) type;
 135                         if(typeof_type->typeof_type != NULL) {
 136                                 type = typeof_type->typeof_type;
 137                         } else {
 138                                 type = typeof_type->expression->datatype;
 139                         }
 140                         continue;
 141                 }
 142                 default:
 143                         break;
 144                 }
 145                 break;
 146         }
 147
 148         return type;
 149 }
 150
 151 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 152 {
 153         switch(atomic_type->atype) {
 154         case ATOMIC_TYPE_SCHAR:
 155         case ATOMIC_TYPE_CHAR:
 156                 return mode_Bs;
 157         case ATOMIC_TYPE_UCHAR:
 158                 return mode_Bu;
 159         case ATOMIC_TYPE_SHORT:
 160                 return mode_Hs;
 161         case ATOMIC_TYPE_USHORT:
 162                 return mode_Hu;
 163         case ATOMIC_TYPE_LONG:
 164         case ATOMIC_TYPE_INT:
 165                 return mode_Is;
 166         case ATOMIC_TYPE_ULONG:
 167         case ATOMIC_TYPE_UINT:
 168                 return mode_Iu;
 169         case ATOMIC_TYPE_LONGLONG:
 170                 return mode_Ls;
 171         case ATOMIC_TYPE_ULONGLONG:
 172                 return mode_Lu;
 173         case ATOMIC_TYPE_FLOAT:
 174                 return mode_F;
 175         case ATOMIC_TYPE_DOUBLE:
 176                 return mode_D;
 177         case ATOMIC_TYPE_LONG_DOUBLE:
 178                 return mode_E;
 179         case ATOMIC_TYPE_BOOL:
 180                 return mode_b;
 181 #ifdef PROVIDE_COMPLEX
 182         case ATOMIC_TYPE_FLOAT_COMPLEX:
 183         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 184         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 185                 panic("complex lowering not implemented yet");
 186                 break;
 187         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 188         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 189         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 190                 panic("imaginary lowering not implemented yet");
 191                 break;
 192 #endif
 193         case ATOMIC_TYPE_VOID:
 194                 panic("tried to get mode from void type");
 195                 break;
 196         case ATOMIC_TYPE_INVALID:
 197                 break;
 198         }
 199         panic("Encountered unknown atomic type");
 200 }
 201
 202
 203 static unsigned get_type_size(type_t *type);
 204
 205 static unsigned get_atomic_type_size(const atomic_type_t *type)
 206 {
 207         switch(type->atype) {
 208         case ATOMIC_TYPE_CHAR:
 209         case ATOMIC_TYPE_SCHAR:
 210         case ATOMIC_TYPE_UCHAR:
 211                 return 1;
 212
 213         case ATOMIC_TYPE_SHORT:
 214         case ATOMIC_TYPE_USHORT:
 215                 return 2;
 216
 217         case ATOMIC_TYPE_BOOL:
 218         case ATOMIC_TYPE_INT:
 219         case ATOMIC_TYPE_UINT:
 220         case ATOMIC_TYPE_LONG:
 221         case ATOMIC_TYPE_ULONG:
 222         case ATOMIC_TYPE_FLOAT:
 223                 return 4;
 224
 225         case ATOMIC_TYPE_LONGLONG:
 226         case ATOMIC_TYPE_ULONGLONG:
 227         case ATOMIC_TYPE_DOUBLE:
 228                 return 8;
 229
 230         case ATOMIC_TYPE_LONG_DOUBLE:
 231                 return 12;
 232
 233         case ATOMIC_TYPE_VOID:
 234                 return 1;
 235
 236         case ATOMIC_TYPE_INVALID:
 237                 break;
 238         }
 239         panic("Trying to determine size of invalid atomic type");
 240 }
 241
 242 static unsigned get_compound_type_size(compound_type_t *type)
 243 {
 244         ir_type *irtype = get_ir_type(&type->type);
 245         return get_type_size_bytes(irtype);
 246 }
 247
 248 static unsigned get_array_type_size(array_type_t *type)
 249 {
 250         ir_type *irtype = get_ir_type(&type->type);
 251         return get_type_size_bytes(irtype);
 252 }
 253
 254 static unsigned get_type_size(type_t *type)
 255 {
 256         type = skip_typeref(type);
 257
 258         switch(type->type) {
 259         case TYPE_ATOMIC:
 260                 return get_atomic_type_size((const atomic_type_t*) type);
 261         case TYPE_ENUM:
 262                 return get_mode_size_bytes(mode_Is);
 263         case TYPE_COMPOUND_UNION:
 264         case TYPE_COMPOUND_STRUCT:
 265                 return get_compound_type_size((compound_type_t*) type);
 266         case TYPE_FUNCTION:
 267                 /* just a pointer to the function */
 268                 return get_mode_size_bytes(mode_P_code);
 269         case TYPE_POINTER:
 270                 return get_mode_size_bytes(mode_P_data);
 271         case TYPE_ARRAY:
 272                 return get_array_type_size((array_type_t*) type);
 273         case TYPE_BUILTIN:
 274         case TYPE_TYPEDEF:
 275         case TYPE_TYPEOF:
 276         case TYPE_INVALID:
 277                 break;
 278         }
 279         panic("Trying to determine size of invalid type");
 280 }
 281
 282 static unsigned count_parameters(const function_type_t *function_type)
 283 {
 284         unsigned count = 0;
 285
 286         function_parameter_t *parameter = function_type->parameters;
 287         for ( ; parameter != NULL; parameter = parameter->next) {
 288                 ++count;
 289         }
 290
 291         return count;
 292 }
 293
 294
 295
 296
 297 static ir_type *create_atomic_type(type2firm_env_t *env,
 298                                    const atomic_type_t *type)
 299 {
 300         (void) env;
 301         ir_mode *mode   = get_atomic_mode(type);
 302         ident   *id     = get_mode_ident(mode);
 303         ir_type *irtype = new_type_primitive(id, mode);
 304
 305         return irtype;
 306 }
 307
 308 static ir_type *create_method_type(type2firm_env_t *env,
 309                                    const function_type_t *function_type)
 310 {
 311         type_t  *result_type  = function_type->result_type;
 312
 313         ident   *id           = unique_ident("functiontype");
 314         int      n_parameters = count_parameters(function_type);
 315         int      n_results    = result_type == type_void ? 0 : 1;
 316         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 317
 318         if(result_type != type_void) {
 319                 ir_type *restype = _get_ir_type(env, result_type);
 320                 set_method_res_type(irtype, 0, restype);
 321         }
 322
 323         function_parameter_t *parameter = function_type->parameters;
 324         int                   n         = 0;
 325         for( ; parameter != NULL; parameter = parameter->next) {
 326                 ir_type *p_irtype = _get_ir_type(env, parameter->type);
 327                 set_method_param_type(irtype, n, p_irtype);
 328                 ++n;
 329         }
 330
 331         if(function_type->variadic) {
 332                 set_method_variadicity(irtype, variadicity_variadic);
 333         }
 334
 335         return irtype;
 336 }
 337
 338 static ir_type *create_pointer_type(type2firm_env_t *env, pointer_type_t *type)
 339 {
 340         type_t  *points_to = type->points_to;
 341         ir_type *ir_points_to;
 342         /* Avoid endless recursion if the points_to type contains this poiner type
 343          * again (might be a struct). We therefore first create a void* pointer
 344          * and then set the real points_to type
 345          */
 346         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 347                                             ir_type_void, mode_P_data);
 348         type->type.firm_type  = ir_type;
 349
 350         ir_points_to = _get_ir_type(env, points_to);
 351         set_pointer_points_to_type(ir_type, ir_points_to);
 352
 353         return ir_type;
 354 }
 355
 356 static ir_type *create_array_type(type2firm_env_t *env, array_type_t *type)
 357 {
 358         type_t  *element_type    = type->element_type;
 359         ir_type *ir_element_type = _get_ir_type(env, element_type);
 360
 361         /* TODO... */
 362         int n_elements = 0;
 363         panic("TODO arraytpye size not implemented yet");
 364
 365         ir_type *ir_type = new_type_array(unique_ident("array"), 1, ir_element_type);
 366         set_array_bounds_int(ir_type, 0, 0, n_elements);
 367
 368         size_t elemsize = get_type_size_bytes(ir_element_type);
 369         int align = get_type_alignment_bytes(ir_element_type);
 370         if(elemsize % align > 0) {
 371                 elemsize += align - (elemsize % align);
 372         }
 373         set_type_size_bytes(ir_type, n_elements * elemsize);
 374         set_type_alignment_bytes(ir_type, align);
 375         set_type_state(ir_type, layout_fixed);
 376
 377         return ir_type;
 378 }
 379
 380 #define INVALID_TYPE ((ir_type_ptr)-1)
 381
 382 static ir_type *create_struct_type(type2firm_env_t *env, compound_type_t *type)
 383 {
 384         symbol_t *symbol = type->declaration->symbol;
 385         ident    *id;
 386         if(symbol != NULL) {
 387                 id = unique_ident(symbol->string);
 388         } else {
 389                 id = unique_ident("__anonymous_struct");
 390         }
 391         ir_type *ir_type = new_type_struct(id);
 392
 393         type->type.firm_type = ir_type;
 394
 395         int align_all = 1;
 396         int offset    = 0;
 397         declaration_t *entry = type->declaration->context.declarations;
 398         for( ; entry != NULL; entry = entry->next) {
 399                 ident       *ident         = new_id_from_str(entry->symbol->string);
 400                 ir_type_ptr  entry_ir_type = _get_ir_type(env, entry->type);
 401
 402                 int entry_size      = get_type_size_bytes(entry_ir_type);
 403                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 404                 int misalign = offset % entry_alignment;
 405                 offset += misalign;
 406
 407                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 408                 set_entity_offset(entity, offset);
 409                 add_struct_member(ir_type, entity);
 410                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 411                 entry->v.entity         = entity;
 412
 413                 offset += entry_size;
 414                 if(entry_alignment > align_all) {
 415                         if(entry_alignment % align_all != 0) {
 416                                 panic("Uneven alignments not supported yet");
 417                         }
 418                         align_all = entry_alignment;
 419                 }
 420         }
 421
 422         int misalign = offset % align_all;
 423         offset += misalign;
 424         set_type_alignment_bytes(ir_type, align_all);
 425         set_type_size_bytes(ir_type, offset);
 426         set_type_state(ir_type, layout_fixed);
 427
 428         return ir_type;
 429 }
 430
 431 static ir_type *create_union_type(type2firm_env_t *env, compound_type_t *type)
 432 {
 433         declaration_t *declaration = type->declaration;
 434         symbol_t      *symbol      = declaration->symbol;
 435         ident         *id;
 436         if(symbol != NULL) {
 437                 id = unique_ident(symbol->string);
 438         } else {
 439                 id = unique_ident("__anonymous_union");
 440         }
 441         ir_type  *ir_type = new_type_union(id);
 442
 443         type->type.firm_type = ir_type;
 444
 445         int align_all = 1;
 446         int size      = 0;
 447         declaration_t *entry = declaration->context.declarations;
 448         for( ; entry != NULL; entry = entry->next) {
 449                 ident       *ident         = new_id_from_str(entry->symbol->string);
 450                 ir_type_ptr  entry_ir_type = _get_ir_type(env, entry->type);
 451
 452                 int entry_size      = get_type_size_bytes(entry_ir_type);
 453                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 454
 455                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 456                 add_union_member(ir_type, entity);
 457                 set_entity_offset(entity, 0);
 458                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 459                 entry->v.entity         = entity;
 460
 461                 if(entry_size > size) {
 462                         size = entry_size;
 463                 }
 464                 if(entry_alignment > align_all) {
 465                         if(entry_alignment % align_all != 0) {
 466                                 panic("Uneven alignments not supported yet");
 467                         }
 468                         align_all = entry_alignment;
 469                 }
 470         }
 471
 472         set_type_alignment_bytes(ir_type, align_all);
 473         set_type_size_bytes(ir_type, size);
 474         set_type_state(ir_type, layout_fixed);
 475
 476         return ir_type;
 477 }
 478
 479 static ir_type *_get_ir_type(type2firm_env_t *env, type_t *type)
 480 {
 481         assert(type != NULL);
 482
 483         type = skip_typeref(type);
 484
 485         if(type->firm_type != NULL) {
 486                 assert(type->firm_type != INVALID_TYPE);
 487                 return type->firm_type;
 488         }
 489
 490         ir_type *firm_type = NULL;
 491         switch(type->type) {
 492         case TYPE_ATOMIC:
 493                 firm_type = create_atomic_type(env, (atomic_type_t*) type);
 494                 break;
 495         case TYPE_FUNCTION:
 496                 firm_type = create_method_type(env, (function_type_t*) type);
 497                 break;
 498         case TYPE_POINTER:
 499                 firm_type = create_pointer_type(env, (pointer_type_t*) type);
 500                 break;
 501         case TYPE_ARRAY:
 502                 firm_type = create_array_type(env, (array_type_t*) type);
 503                 break;
 504         case TYPE_COMPOUND_STRUCT:
 505                 firm_type = create_struct_type(env, (compound_type_t*) type);
 506                 break;
 507         case TYPE_COMPOUND_UNION:
 508                 firm_type = create_union_type(env, (compound_type_t*) type);
 509                 break;
 510         case TYPE_ENUM:
 511                 firm_type = ir_type_int;
 512                 break;
 513         case TYPE_BUILTIN:
 514         case TYPE_TYPEOF:
 515         case TYPE_TYPEDEF:
 516         case TYPE_INVALID:
 517                 break;
 518         }
 519         if(firm_type == NULL)
 520                 panic("unknown type found");
 521
 522         if(env->can_cache) {
 523                 type->firm_type = firm_type;
 524         }
 525         return firm_type;
 526
 527 }
 528
 529 static ir_type *get_ir_type(type_t *type)
 530 {
 531         type2firm_env_t env;
 532         env.can_cache = 1;
 533
 534         return _get_ir_type(&env, type);
 535 }
 536
 537 static inline ir_mode *get_ir_mode(type_t *type)
 538 {
 539         ir_type *irtype = get_ir_type(type);
 540         ir_mode *mode   = get_type_mode(irtype);
 541         assert(mode != NULL);
 542         return mode;
 543 }
 544
 545 static ir_entity* get_function_entity(declaration_t *declaration)
 546 {
 547         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 548                 return declaration->v.entity;
 549         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 550
 551         symbol_t *symbol = declaration->symbol;
 552         ident    *id     = new_id_from_str(symbol->string);
 553
 554         ir_type  *global_type    = get_glob_type();
 555         ir_type  *ir_type_method = get_ir_type(declaration->type);
 556         assert(is_Method_type(ir_type_method));
 557
 558         type_t    *type   = declaration->type;
 559         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 560         set_entity_ld_ident(entity, id);
 561         if(declaration->storage_class & STORAGE_CLASS_STATIC
 562                         || type->qualifiers & TYPE_QUALIFIER_INLINE) {
 563                 set_entity_visibility(entity, visibility_local);
 564         } else if(declaration->init.statement != NULL) {
 565                 set_entity_visibility(entity, visibility_external_visible);
 566         } else {
 567                 set_entity_visibility(entity, visibility_external_allocated);
 568         }
 569
 570         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 571         declaration->v.entity         = entity;
 572
 573         return entity;
 574 }
 575
 576
 577
 578 static ir_node *expression_to_firm(const expression_t *expression);
 579
 580 static dbg_info *get_dbg_info(const source_position_t *pos)
 581 {
 582         return (dbg_info*) pos;
 583 }
 584
 585 static ir_node *const_to_firm(const const_t *cnst)
 586 {
 587         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 588         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 589
 590         tarval   *tv;
 591         if(mode_is_float(mode)) {
 592                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 593         } else {
 594                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 595         }
 596
 597         return new_d_Const(dbgi, mode, tv);
 598 }
 599
 600 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 601 {
 602         assert(entity != NULL);
 603         union symconst_symbol sym;
 604         sym.entity_p = entity;
 605         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 606 }
 607
 608 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 609 {
 610         ir_type   *global_type = get_glob_type();
 611         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 612                                                 ir_type_const_char);
 613
 614         ident     *id     = unique_ident("Lstr");
 615         ir_entity *entity = new_entity(global_type, id, type);
 616         set_entity_ld_ident(entity, id);
 617         set_entity_variability(entity, variability_constant);
 618
 619         ir_type    *elem_type = ir_type_const_char;
 620         ir_mode    *mode      = get_type_mode(elem_type);
 621
 622         const char *string = literal->value;
 623         size_t      slen   = strlen(string) + 1;
 624
 625         set_array_lower_bound_int(type, 0, 0);
 626         set_array_upper_bound_int(type, 0, slen);
 627         set_type_size_bytes(type, slen);
 628         set_type_state(type, layout_fixed);
 629
 630         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 631         for(size_t i = 0; i < slen; ++i) {
 632                 tvs[i] = new_tarval_from_long(string[i], mode);
 633         }
 634
 635         set_array_entity_values(entity, tvs, slen);
 636         free(tvs);
 637
 638         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 639
 640         return create_symconst(dbgi, entity);
 641 }
 642
 643 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 644 {
 645         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 646         declaration_t *declaration = ref->declaration;
 647
 648         switch((declaration_type_t) declaration->declaration_type) {
 649         case DECLARATION_TYPE_UNKNOWN:
 650                 break;
 651         case DECLARATION_TYPE_PARAMETER: {
 652                 ir_node *args  = get_irg_args(current_ir_graph);
 653                 ir_mode *mode  = get_ir_mode(declaration->type);
 654                 ir_node *block = get_irg_start_block(current_ir_graph);
 655                 long     pn    = declaration->v.value_number;
 656
 657                 return new_r_Proj(current_ir_graph, block, args, mode, pn);
 658         }
 659         case DECLARATION_TYPE_FUNCTION: {
 660                 return create_symconst(dbgi, declaration->v.entity);
 661         }
 662         case DECLARATION_TYPE_PARAMETER_ENTITY:
 663         case DECLARATION_TYPE_LOCAL_VARIABLE:
 664         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 665         case DECLARATION_TYPE_GLOBAL_VARIABLE:
 666         case DECLARATION_TYPE_COMPOUND_MEMBER:
 667                 panic("not implemented reference type");
 668         }
 669
 670         panic("reference to declaration with unknown type found");
 671 }
 672
 673 static ir_node *call_expression_to_firm(const call_expression_t *call)
 674 {
 675         expression_t  *function = call->function;
 676         ir_node       *callee   = expression_to_firm(function);
 677
 678         assert(function->datatype->type == TYPE_FUNCTION);
 679         function_type_t *function_type = (function_type_t*) function->datatype;
 680
 681         int              n_parameters = 0;
 682         call_argument_t *argument     = call->arguments;
 683         for( ; argument != NULL; argument = argument->next) {
 684                 ++n_parameters;
 685         }
 686
 687         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 688         ir_type *new_method_type = NULL;
 689         if(function_type->variadic) {
 690                 /* we need to construct a new method type matching the call
 691                  * arguments... */
 692                 int n_res       = get_method_n_ress(ir_method_type);
 693                 new_method_type = new_type_method(unique_ident("calltype"),
 694                                                   n_parameters, n_res);
 695                 set_method_calling_convention(new_method_type,
 696                                get_method_calling_convention(ir_method_type));
 697                 set_method_additional_properties(new_method_type,
 698                                get_method_additional_properties(ir_method_type));
 699
 700                 for(int i = 0; i < n_res; ++i) {
 701                         set_method_res_type(new_method_type, i,
 702                                             get_method_res_type(ir_method_type, i));
 703                 }
 704         }
 705         ir_node *in[n_parameters];
 706
 707         argument = call->arguments;
 708         int n = 0;
 709         for( ; argument != NULL; argument = argument->next) {
 710                 expression_t *expression = argument->expression;
 711                 ir_node      *arg_node   = expression_to_firm(expression);
 712
 713                 in[n] = arg_node;
 714                 if(new_method_type != NULL) {
 715                         ir_type *irtype = get_ir_type(expression->datatype);
 716                         set_method_param_type(new_method_type, n, irtype);
 717                 }
 718
 719                 n++;
 720         }
 721         assert(n == n_parameters);
 722
 723         if(new_method_type != NULL)
 724                 ir_method_type = new_method_type;
 725
 726         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 727         ir_node  *store = get_store();
 728         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 729                                      ir_method_type);
 730         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 731         set_store(mem);
 732
 733         type_t  *result_type = function_type->result_type;
 734         ir_node *result      = NULL;
 735         if(result_type != type_void) {
 736                 ir_mode *mode    = get_ir_mode(result_type);
 737                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 738                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 739         }
 740
 741         return result;
 742 }
 743
 744 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 745                                           dbg_info *dbgi)
 746 {
 747         ir_mode *mode     = get_ir_mode(type);
 748         ir_node *memory   = get_store();
 749         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 750         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 751         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 752         set_store(load_mem);
 753
 754         return load_res;
 755 }
 756
 757 static ir_node *expression_addr(const expression_t *expression)
 758 {
 759         (void) expression;
 760         panic("expression_addr not implemented yet");
 761         return NULL;
 762 }
 763
 764 static void set_value_for_expression(const expression_t *expression,
 765                                      ir_node *value)
 766 {
 767         (void) expression;
 768         (void) value;
 769         panic("set_value_for_expression not implemented yet");
 770 }
 771
 772 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 773 {
 774         ir_mode *value_mode = get_irn_mode(value);
 775
 776         if(value_mode == dest_mode)
 777                 return value;
 778
 779         if(dest_mode == mode_b) {
 780                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 781                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 782                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 783                 return proj;
 784         }
 785
 786         return new_d_Conv(dbgi, value, dest_mode);
 787 }
 788
 789 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 790 {
 791         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 792         type_t   *type = expression->expression.datatype;
 793         ir_mode  *mode = get_ir_mode(type);
 794
 795         if(expression->type == UNEXPR_TAKE_ADDRESS)
 796                 return expression_addr(expression->value);
 797
 798         const expression_t *value      = expression->value;
 799         ir_node            *value_node = expression_to_firm(value);
 800
 801         switch(expression->type) {
 802         case UNEXPR_NEGATE:
 803                 return new_d_Minus(dbgi, value_node, mode);
 804         case UNEXPR_PLUS:
 805                 return value_node;
 806         case UNEXPR_BITWISE_NEGATE:
 807                 return new_d_Not(dbgi, value_node, mode);
 808         case UNEXPR_NOT:
 809                 if(get_irn_mode(value_node) != mode_b) {
 810                         value_node = create_conv(dbgi, value_node, mode_b);
 811                 }
 812                 value_node = new_d_Not(dbgi, value_node, mode_b);
 813                 if(mode != mode_b) {
 814                         value_node = create_conv(dbgi, value_node, mode);
 815                 }
 816                 return value_node;
 817         case UNEXPR_DEREFERENCE:
 818                 return load_from_expression_addr(type, value_node, dbgi);
 819         case UNEXPR_POSTFIX_INCREMENT: {
 820                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 821                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 822                 set_value_for_expression(value, new_value);
 823                 return value_node;
 824         }
 825         case UNEXPR_POSTFIX_DECREMENT: {
 826                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 827                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 828                 set_value_for_expression(value, new_value);
 829                 return value_node;
 830         }
 831         case UNEXPR_PREFIX_INCREMENT: {
 832                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 833                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 834                 set_value_for_expression(value, new_value);
 835                 return new_value;
 836         }
 837         case UNEXPR_PREFIX_DECREMENT: {
 838                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 839                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 840                 set_value_for_expression(value, new_value);
 841                 return new_value;
 842         }
 843         case UNEXPR_CAST:
 844                 return create_conv(dbgi, value_node, mode);
 845
 846         case UNEXPR_TAKE_ADDRESS:
 847         case UNEXPR_INVALID:
 848                 break;
 849         }
 850         panic("invalid UNEXPR type found");
 851 }
 852
 853 static ir_node *expression_to_firm(const expression_t *expression)
 854 {
 855         switch(expression->type) {
 856         case EXPR_CONST:
 857                 return const_to_firm((const const_t*) expression);
 858         case EXPR_STRING_LITERAL:
 859                 return string_literal_to_firm((const string_literal_t*) expression);
 860         case EXPR_REFERENCE:
 861                 return reference_expression_to_firm((const reference_expression_t*)
 862                                                     expression);
 863         case EXPR_CALL:
 864                 return call_expression_to_firm((const call_expression_t*) expression);
 865         case EXPR_UNARY:
 866                 return unary_expression_to_firm((const unary_expression_t*) expression);
 867         default:
 868                 break;
 869         }
 870         panic("unsupported expression found");
 871 }
 872
 873
 874
 875 static void statement_to_firm(statement_t *statement);
 876
 877 static void return_statement_to_firm(return_statement_t *statement)
 878 {
 879         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
 880         ir_node  *ret;
 881
 882         if(statement->return_value != NULL) {
 883                 ir_node *retval = expression_to_firm(statement->return_value);
 884                 ir_node *in[1];
 885
 886                 in[0] = retval;
 887                 ret   = new_d_Return(dbgi, get_store(), 1, in);
 888         } else {
 889                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
 890         }
 891         ir_node *end_block = get_irg_end_block(current_ir_graph);
 892         add_immBlock_pred(end_block, ret);
 893
 894         set_cur_block(NULL);
 895 }
 896
 897 static void compound_statement_to_firm(compound_statement_t *compound)
 898 {
 899         statement_t *statement = compound->statements;
 900         for( ; statement != NULL; statement = statement->next) {
 901                 //context2firm(&statement->context);
 902                 statement_to_firm(statement);
 903         }
 904 }
 905
 906 static void expression_statement_to_firm(expression_statement_t *statement)
 907 {
 908         expression_to_firm(statement->expression);
 909 }
 910
 911 static void statement_to_firm(statement_t *statement)
 912 {
 913         switch(statement->type) {
 914         case STATEMENT_COMPOUND:
 915                 compound_statement_to_firm((compound_statement_t*) statement);
 916                 return;
 917         case STATEMENT_RETURN:
 918                 return_statement_to_firm((return_statement_t*) statement);
 919                 return;
 920         case STATEMENT_EXPRESSION:
 921                 expression_statement_to_firm((expression_statement_t*) statement);
 922                 return;
 923         default:
 924                 break;
 925         }
 926         panic("Statement not implemented\n");
 927 }
 928
 929 static int get_function_n_local_vars(declaration_t *declaration)
 930 {
 931         (void) declaration;
 932         /* TODO */
 933         return 30;
 934 }
 935
 936 static void initialize_function_parameters(declaration_t *declaration)
 937 {
 938         int            n         = 0;
 939         declaration_t *parameter = declaration->context.declarations;
 940         for( ; parameter != NULL; parameter = parameter->next) {
 941                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
 942
 943                 parameter->declaration_type = DECLARATION_TYPE_PARAMETER;
 944                 parameter->v.value_number   = n;
 945                 ++n;
 946         }
 947 }
 948
 949 static void create_function(declaration_t *declaration)
 950 {
 951         ir_entity *entity = get_function_entity(declaration);
 952
 953         if(declaration->init.statement == NULL)
 954                 return;
 955
 956         initialize_function_parameters(declaration);
 957
 958         int        n_local_vars = get_function_n_local_vars(declaration);
 959         ir_graph  *irg          = new_ir_graph(entity, n_local_vars);
 960         ir_node   *first_block  = get_cur_block();
 961
 962         statement_to_firm(declaration->init.statement);
 963
 964         ir_node *end_block = get_irg_end_block(irg);
 965
 966         /* do we have a return statement yet? */
 967         if(get_cur_block() != NULL) {
 968                 ir_node *ret = new_Return(get_store(), 0, NULL);
 969                 add_immBlock_pred(end_block, ret);
 970         }
 971
 972         mature_immBlock(first_block);
 973         mature_immBlock(end_block);
 974
 975         irg_finalize_cons(irg);
 976
 977         /* finalize the frame type */
 978         ir_type *frame_type = get_irg_frame_type(irg);
 979         int      n          = get_compound_n_members(frame_type);
 980         int      align_all  = 4;
 981         int      offset     = 0;
 982         for(int i = 0; i < n; ++i) {
 983                 ir_entity *entity      = get_compound_member(frame_type, i);
 984                 ir_type   *entity_type = get_entity_type(entity);
 985
 986                 int align = get_type_alignment_bytes(entity_type);
 987                 if(align > align_all)
 988                         align_all = align;
 989                 int misalign = 0;
 990                 if(align > 0) {
 991                         misalign  = offset % align;
 992                         offset   += misalign;
 993                 }
 994
 995                 set_entity_offset(entity, offset);
 996                 offset += get_type_size_bytes(entity_type);
 997         }
 998         set_type_size_bytes(frame_type, offset);
 999         set_type_alignment_bytes(frame_type, align_all);
1000         set_type_state(frame_type, layout_fixed);
1001
1002         irg_vrfy(irg);
1003 }
1004
1005 static void context_to_firm(context_t *context)
1006 {
1007         declaration_t *declaration = context->declarations;
1008         for( ; declaration != NULL; declaration = declaration->next) {
1009                 type_t *type = declaration->type;
1010                 if(type->type == TYPE_FUNCTION) {
1011                         create_function(declaration);
1012                 } else {
1013                         /* TODO... */
1014                 }
1015         }
1016 }
1017
1018 void translation_unit_to_firm(translation_unit_t *unit)
1019 {
1020         /* remove me later TODO FIXME */
1021         (void) get_type_size;
1022
1023         context_to_firm(& unit->context);
1024 }