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 "ast2firm.h"
  12
  13 #include "adt/error.h"
  14 #include "token_t.h"
  15 #include "type_t.h"
  16 #include "ast_t.h"
  17
  18 static ir_type *ir_type_const_char;
  19 static ir_type *ir_type_void;
  20 static ir_type *ir_type_int;
  21 static ir_type *ir_type_void_ptr;
  22
  23 static type_t *type_const_char;
  24 static type_t *type_void;
  25 static type_t *type_int;
  26
  27 typedef enum declaration_type_t {
  28         DECLARATION_TYPE_UNKNOWN,
  29         DECLARATION_TYPE_FUNCTION,
  30         DECLARATION_TYPE_GLOBAL_VARIABLE,
  31         DECLARATION_TYPE_PARAMETER,
  32         DECLARATION_TYPE_PARAMETER_ENTITY,
  33         DECLARATION_TYPE_LOCAL_VARIABLE,
  34         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  35         DECLARATION_TYPE_COMPOUND_MEMBER
  36 } declaration_type_t;
  37
  38 typedef struct type2firm_env_t type2firm_env_t;
  39 struct type2firm_env_t {
  40         int can_cache;       /* nonzero if type can safely be cached because
  41                                 no typevariables are in the hierarchy */
  42 };
  43
  44 static ir_type *_get_ir_type(type2firm_env_t *env, type_t *type);
  45 static ir_type *get_ir_type(type_t *type);
  46
  47 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  48 {
  49         (void) pos;
  50 #if 0
  51         const declaration_t *declaration = & value_numbers[pos]->declaration;
  52
  53         print_warning_prefix(declaration->source_position);
  54         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  55                         declaration->symbol->string);
  56 #endif
  57         fprintf(stderr, "Some variable might be used uninitialized\n");
  58         return new_r_Unknown(irg, mode);
  59 }
  60
  61 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  62 {
  63         const source_position_t *pos = (const source_position_t*) dbg;
  64         if(pos == NULL)
  65                 return 0;
  66         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  67                                    pos->linenr);
  68 }
  69
  70 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  71 {
  72         const source_position_t *pos = (const source_position_t*) dbg;
  73         if(pos == NULL)
  74                 return NULL;
  75         if(line != NULL)
  76                 *line = pos->linenr;
  77         return pos->input_name;
  78 }
  79
  80 void init_ast2firm(void)
  81 {
  82         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  83         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  84         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  85
  86         ir_type_int        = get_ir_type(type_int);
  87         ir_type_const_char = get_ir_type(type_const_char);
  88         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  89                                                        type in firm */
  90         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  91                                               ir_type_void, mode_P_data);
  92
  93         type_void->firm_type = ir_type_void;
  94 }
  95
  96 void exit_ast2firm(void)
  97 {
  98 }
  99
 100 static unsigned unique_id = 0;
 101
 102 static ident *unique_ident(const char *tag)
 103 {
 104         char buf[256];
 105
 106         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 107         unique_id++;
 108         return new_id_from_str(buf);
 109 }
 110
 111 static type_t *skip_typeref(type_t *type)
 112 {
 113         while(1) {
 114                 switch(type->type) {
 115                 case TYPE_TYPEDEF: {
 116                         const typedef_type_t *typedef_type = (const typedef_type_t*) type;
 117                         type = typedef_type->declaration->type;
 118                         continue;
 119                 }
 120                 case TYPE_TYPEOF: {
 121                         const typeof_type_t *typeof_type = (const typeof_type_t *) type;
 122                         if(typeof_type->typeof_type != NULL) {
 123                                 type = typeof_type->typeof_type;
 124                         } else {
 125                                 type = typeof_type->expression->datatype;
 126                         }
 127                         continue;
 128                 }
 129                 default:
 130                         break;
 131                 }
 132                 break;
 133         }
 134
 135         return type;
 136 }
 137
 138 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 139 {
 140         switch(atomic_type->atype) {
 141         case ATOMIC_TYPE_SCHAR:
 142         case ATOMIC_TYPE_CHAR:
 143                 return mode_Bs;
 144         case ATOMIC_TYPE_UCHAR:
 145                 return mode_Bu;
 146         case ATOMIC_TYPE_SHORT:
 147                 return mode_Hs;
 148         case ATOMIC_TYPE_USHORT:
 149                 return mode_Hu;
 150         case ATOMIC_TYPE_LONG:
 151         case ATOMIC_TYPE_INT:
 152                 return mode_Is;
 153         case ATOMIC_TYPE_ULONG:
 154         case ATOMIC_TYPE_UINT:
 155                 return mode_Iu;
 156         case ATOMIC_TYPE_LONGLONG:
 157                 return mode_Ls;
 158         case ATOMIC_TYPE_ULONGLONG:
 159                 return mode_Lu;
 160         case ATOMIC_TYPE_FLOAT:
 161                 return mode_F;
 162         case ATOMIC_TYPE_DOUBLE:
 163                 return mode_D;
 164         case ATOMIC_TYPE_LONG_DOUBLE:
 165                 return mode_E;
 166         case ATOMIC_TYPE_BOOL:
 167                 return mode_b;
 168 #ifdef PROVIDE_COMPLEX
 169         case ATOMIC_TYPE_FLOAT_COMPLEX:
 170         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 171         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 172                 panic("complex lowering not implemented yet");
 173                 break;
 174         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 175         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 176         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 177                 panic("imaginary lowering not implemented yet");
 178                 break;
 179 #endif
 180         case ATOMIC_TYPE_VOID:
 181                 panic("tried to get mode from void type");
 182                 break;
 183         case ATOMIC_TYPE_INVALID:
 184                 break;
 185         }
 186         panic("Encountered unknown atomic type");
 187 }
 188
 189
 190 static unsigned get_type_size(type_t *type);
 191
 192 static unsigned get_atomic_type_size(const atomic_type_t *type)
 193 {
 194         switch(type->atype) {
 195         case ATOMIC_TYPE_CHAR:
 196         case ATOMIC_TYPE_SCHAR:
 197         case ATOMIC_TYPE_UCHAR:
 198                 return 1;
 199
 200         case ATOMIC_TYPE_SHORT:
 201         case ATOMIC_TYPE_USHORT:
 202                 return 2;
 203
 204         case ATOMIC_TYPE_BOOL:
 205         case ATOMIC_TYPE_INT:
 206         case ATOMIC_TYPE_UINT:
 207         case ATOMIC_TYPE_LONG:
 208         case ATOMIC_TYPE_ULONG:
 209         case ATOMIC_TYPE_FLOAT:
 210                 return 4;
 211
 212         case ATOMIC_TYPE_LONGLONG:
 213         case ATOMIC_TYPE_ULONGLONG:
 214         case ATOMIC_TYPE_DOUBLE:
 215                 return 8;
 216
 217         case ATOMIC_TYPE_LONG_DOUBLE:
 218                 return 12;
 219
 220         case ATOMIC_TYPE_VOID:
 221                 return 1;
 222
 223         case ATOMIC_TYPE_INVALID:
 224                 break;
 225         }
 226         panic("Trying to determine size of invalid atomic type");
 227 }
 228
 229 static unsigned get_compound_type_size(compound_type_t *type)
 230 {
 231         ir_type *irtype = get_ir_type(&type->type);
 232         return get_type_size_bytes(irtype);
 233 }
 234
 235 static unsigned get_array_type_size(array_type_t *type)
 236 {
 237         ir_type *irtype = get_ir_type(&type->type);
 238         return get_type_size_bytes(irtype);
 239 }
 240
 241 static unsigned get_type_size(type_t *type)
 242 {
 243         type = skip_typeref(type);
 244
 245         switch(type->type) {
 246         case TYPE_ATOMIC:
 247                 return get_atomic_type_size((const atomic_type_t*) type);
 248         case TYPE_ENUM:
 249                 return get_mode_size_bytes(mode_Is);
 250         case TYPE_COMPOUND_UNION:
 251         case TYPE_COMPOUND_STRUCT:
 252                 return get_compound_type_size((compound_type_t*) type);
 253         case TYPE_FUNCTION:
 254                 /* just a pointer to the function */
 255                 return get_mode_size_bytes(mode_P_code);
 256         case TYPE_POINTER:
 257                 return get_mode_size_bytes(mode_P_data);
 258         case TYPE_ARRAY:
 259                 return get_array_type_size((array_type_t*) type);
 260         case TYPE_BUILTIN:
 261         case TYPE_TYPEDEF:
 262         case TYPE_TYPEOF:
 263         case TYPE_INVALID:
 264                 break;
 265         }
 266         panic("Trying to determine size of invalid type");
 267 }
 268
 269 static unsigned count_parameters(const function_type_t *function_type)
 270 {
 271         unsigned count = 0;
 272
 273         function_parameter_t *parameter = function_type->parameters;
 274         for ( ; parameter != NULL; parameter = parameter->next) {
 275                 ++count;
 276         }
 277
 278         return count;
 279 }
 280
 281
 282
 283
 284 static ir_type *create_atomic_type(type2firm_env_t *env,
 285                                    const atomic_type_t *type)
 286 {
 287         (void) env;
 288         ir_mode *mode   = get_atomic_mode(type);
 289         ident   *id     = get_mode_ident(mode);
 290         ir_type *irtype = new_type_primitive(id, mode);
 291
 292         return irtype;
 293 }
 294
 295 static ir_type *create_method_type(type2firm_env_t *env,
 296                                    const function_type_t *function_type)
 297 {
 298         type_t  *result_type  = function_type->result_type;
 299
 300         ident   *id           = unique_ident("functiontype");
 301         int      n_parameters = count_parameters(function_type);
 302         int      n_results    = result_type == type_void ? 0 : 1;
 303         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 304
 305         if(result_type != type_void) {
 306                 ir_type *restype = _get_ir_type(env, result_type);
 307                 set_method_res_type(irtype, 0, restype);
 308         }
 309
 310         function_parameter_t *parameter = function_type->parameters;
 311         int                   n         = 0;
 312         for( ; parameter != NULL; parameter = parameter->next) {
 313                 ir_type *p_irtype = _get_ir_type(env, parameter->type);
 314                 set_method_param_type(irtype, n, p_irtype);
 315                 ++n;
 316         }
 317
 318         if(function_type->variadic) {
 319                 set_method_variadicity(irtype, variadicity_variadic);
 320         }
 321
 322         return irtype;
 323 }
 324
 325 static ir_type *create_pointer_type(type2firm_env_t *env, pointer_type_t *type)
 326 {
 327         type_t  *points_to = type->points_to;
 328         ir_type *ir_points_to;
 329         /* Avoid endless recursion if the points_to type contains this poiner type
 330          * again (might be a struct). We therefore first create a void* pointer
 331          * and then set the real points_to type
 332          */
 333         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 334                                             ir_type_void, mode_P_data);
 335         type->type.firm_type  = ir_type;
 336
 337         ir_points_to = _get_ir_type(env, points_to);
 338         set_pointer_points_to_type(ir_type, ir_points_to);
 339
 340         return ir_type;
 341 }
 342
 343 static ir_type *create_array_type(type2firm_env_t *env, array_type_t *type)
 344 {
 345         type_t  *element_type    = type->element_type;
 346         ir_type *ir_element_type = _get_ir_type(env, element_type);
 347
 348         /* TODO... */
 349         int n_elements = 0;
 350         panic("TODO arraytpye size not implemented yet");
 351
 352         ir_type *ir_type = new_type_array(unique_ident("array"), 1, ir_element_type);
 353         set_array_bounds_int(ir_type, 0, 0, n_elements);
 354
 355         size_t elemsize = get_type_size_bytes(ir_element_type);
 356         int align = get_type_alignment_bytes(ir_element_type);
 357         if(elemsize % align > 0) {
 358                 elemsize += align - (elemsize % align);
 359         }
 360         set_type_size_bytes(ir_type, n_elements * elemsize);
 361         set_type_alignment_bytes(ir_type, align);
 362         set_type_state(ir_type, layout_fixed);
 363
 364         return ir_type;
 365 }
 366
 367 #define INVALID_TYPE ((ir_type_ptr)-1)
 368
 369 static ir_type *create_struct_type(type2firm_env_t *env, compound_type_t *type)
 370 {
 371         symbol_t *symbol = type->declaration->symbol;
 372         ident    *id;
 373         if(symbol != NULL) {
 374                 id = unique_ident(symbol->string);
 375         } else {
 376                 id = unique_ident("__anonymous_struct");
 377         }
 378         ir_type *ir_type = new_type_struct(id);
 379
 380         type->type.firm_type = ir_type;
 381
 382         int align_all = 1;
 383         int offset    = 0;
 384         declaration_t *entry = type->declaration->context.declarations;
 385         for( ; entry != NULL; entry = entry->next) {
 386                 ident       *ident         = new_id_from_str(entry->symbol->string);
 387                 ir_type_ptr  entry_ir_type = _get_ir_type(env, entry->type);
 388
 389                 int entry_size      = get_type_size_bytes(entry_ir_type);
 390                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 391                 int misalign = offset % entry_alignment;
 392                 offset += misalign;
 393
 394                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 395                 set_entity_offset(entity, offset);
 396                 add_struct_member(ir_type, entity);
 397                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 398                 entry->v.entity         = entity;
 399
 400                 offset += entry_size;
 401                 if(entry_alignment > align_all) {
 402                         if(entry_alignment % align_all != 0) {
 403                                 panic("Uneven alignments not supported yet");
 404                         }
 405                         align_all = entry_alignment;
 406                 }
 407         }
 408
 409         int misalign = offset % align_all;
 410         offset += misalign;
 411         set_type_alignment_bytes(ir_type, align_all);
 412         set_type_size_bytes(ir_type, offset);
 413         set_type_state(ir_type, layout_fixed);
 414
 415         return ir_type;
 416 }
 417
 418 static ir_type *create_union_type(type2firm_env_t *env, compound_type_t *type)
 419 {
 420         declaration_t *declaration = type->declaration;
 421         symbol_t      *symbol      = declaration->symbol;
 422         ident         *id;
 423         if(symbol != NULL) {
 424                 id = unique_ident(symbol->string);
 425         } else {
 426                 id = unique_ident("__anonymous_union");
 427         }
 428         ir_type  *ir_type = new_type_union(id);
 429
 430         type->type.firm_type = ir_type;
 431
 432         int align_all = 1;
 433         int size      = 0;
 434         declaration_t *entry = declaration->context.declarations;
 435         for( ; entry != NULL; entry = entry->next) {
 436                 ident       *ident         = new_id_from_str(entry->symbol->string);
 437                 ir_type_ptr  entry_ir_type = _get_ir_type(env, entry->type);
 438
 439                 int entry_size      = get_type_size_bytes(entry_ir_type);
 440                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 441
 442                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 443                 add_union_member(ir_type, entity);
 444                 set_entity_offset(entity, 0);
 445                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 446                 entry->v.entity         = entity;
 447
 448                 if(entry_size > size) {
 449                         size = entry_size;
 450                 }
 451                 if(entry_alignment > align_all) {
 452                         if(entry_alignment % align_all != 0) {
 453                                 panic("Uneven alignments not supported yet");
 454                         }
 455                         align_all = entry_alignment;
 456                 }
 457         }
 458
 459         set_type_alignment_bytes(ir_type, align_all);
 460         set_type_size_bytes(ir_type, size);
 461         set_type_state(ir_type, layout_fixed);
 462
 463         return ir_type;
 464 }
 465
 466 static ir_type *_get_ir_type(type2firm_env_t *env, type_t *type)
 467 {
 468         assert(type != NULL);
 469
 470         type = skip_typeref(type);
 471
 472         if(type->firm_type != NULL) {
 473                 assert(type->firm_type != INVALID_TYPE);
 474                 return type->firm_type;
 475         }
 476
 477         ir_type *firm_type = NULL;
 478         switch(type->type) {
 479         case TYPE_ATOMIC:
 480                 firm_type = create_atomic_type(env, (atomic_type_t*) type);
 481                 break;
 482         case TYPE_FUNCTION:
 483                 firm_type = create_method_type(env, (function_type_t*) type);
 484                 break;
 485         case TYPE_POINTER:
 486                 firm_type = create_pointer_type(env, (pointer_type_t*) type);
 487                 break;
 488         case TYPE_ARRAY:
 489                 firm_type = create_array_type(env, (array_type_t*) type);
 490                 break;
 491         case TYPE_COMPOUND_STRUCT:
 492                 firm_type = create_struct_type(env, (compound_type_t*) type);
 493                 break;
 494         case TYPE_COMPOUND_UNION:
 495                 firm_type = create_union_type(env, (compound_type_t*) type);
 496                 break;
 497         case TYPE_ENUM:
 498                 firm_type = ir_type_int;
 499                 break;
 500         case TYPE_BUILTIN:
 501         case TYPE_TYPEOF:
 502         case TYPE_TYPEDEF:
 503         case TYPE_INVALID:
 504                 break;
 505         }
 506         if(firm_type == NULL)
 507                 panic("unknown type found");
 508
 509         if(env->can_cache) {
 510                 type->firm_type = firm_type;
 511         }
 512         return firm_type;
 513
 514 }
 515
 516 static ir_type *get_ir_type(type_t *type)
 517 {
 518         type2firm_env_t env;
 519         env.can_cache = 1;
 520
 521         return _get_ir_type(&env, type);
 522 }
 523
 524 static inline ir_mode *get_ir_mode(type_t *type)
 525 {
 526         ir_type *irtype = get_ir_type(type);
 527         ir_mode *mode   = get_type_mode(irtype);
 528         assert(mode != NULL);
 529         return mode;
 530 }
 531
 532 static ir_entity* get_function_entity(declaration_t *declaration)
 533 {
 534         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 535                 return declaration->v.entity;
 536         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 537
 538         symbol_t *symbol = declaration->symbol;
 539         ident    *id     = new_id_from_str(symbol->string);
 540
 541         ir_type  *global_type    = get_glob_type();
 542         ir_type  *ir_type_method = get_ir_type(declaration->type);
 543         assert(is_Method_type(ir_type_method));
 544
 545         type_t    *type   = declaration->type;
 546         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 547         set_entity_ld_ident(entity, id);
 548         if(declaration->storage_class & STORAGE_CLASS_STATIC
 549                         || type->qualifiers & TYPE_QUALIFIER_INLINE) {
 550                 set_entity_visibility(entity, visibility_local);
 551         } else if(declaration->init.statement != NULL) {
 552                 set_entity_visibility(entity, visibility_external_visible);
 553         } else {
 554                 set_entity_visibility(entity, visibility_external_allocated);
 555         }
 556
 557         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 558         declaration->v.entity         = entity;
 559
 560         return entity;
 561 }
 562
 563
 564
 565 static ir_node *expression_to_firm(const expression_t *expression);
 566
 567 static dbg_info *get_dbg_info(const source_position_t *pos)
 568 {
 569         return (dbg_info*) pos;
 570 }
 571
 572 static ir_node *const_to_firm(const const_t *cnst)
 573 {
 574         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 575         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 576
 577         tarval   *tv;
 578         if(mode_is_float(mode)) {
 579                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 580         } else {
 581                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 582         }
 583
 584         return new_d_Const(dbgi, mode, tv);
 585 }
 586
 587 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 588 {
 589         assert(entity != NULL);
 590         union symconst_symbol sym;
 591         sym.entity_p = entity;
 592         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 593 }
 594
 595 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 596 {
 597         ir_type   *global_type = get_glob_type();
 598         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 599                                                 ir_type_const_char);
 600
 601         ident     *id     = unique_ident("Lstr");
 602         ir_entity *entity = new_entity(global_type, id, type);
 603         set_entity_ld_ident(entity, id);
 604         set_entity_variability(entity, variability_constant);
 605
 606         ir_type    *elem_type = ir_type_const_char;
 607         ir_mode    *mode      = get_type_mode(elem_type);
 608
 609         const char *string = literal->value;
 610         size_t      slen   = strlen(string) + 1;
 611
 612         set_array_lower_bound_int(type, 0, 0);
 613         set_array_upper_bound_int(type, 0, slen);
 614         set_type_size_bytes(type, slen);
 615         set_type_state(type, layout_fixed);
 616
 617         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 618         for(size_t i = 0; i < slen; ++i) {
 619                 tvs[i] = new_tarval_from_long(string[i], mode);
 620         }
 621
 622         set_array_entity_values(entity, tvs, slen);
 623         free(tvs);
 624
 625         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 626
 627         return create_symconst(dbgi, entity);
 628 }
 629
 630 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 631 {
 632         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 633         declaration_t *declaration = ref->declaration;
 634
 635         switch((declaration_type_t) declaration->declaration_type) {
 636         case DECLARATION_TYPE_UNKNOWN:
 637                 break;
 638         case DECLARATION_TYPE_PARAMETER: {
 639                 ir_node *args  = get_irg_args(current_ir_graph);
 640                 ir_mode *mode  = get_ir_mode(declaration->type);
 641                 ir_node *block = get_irg_start_block(current_ir_graph);
 642                 long     pn    = declaration->v.value_number;
 643
 644                 return new_r_Proj(current_ir_graph, block, args, mode, pn);
 645         }
 646         case DECLARATION_TYPE_FUNCTION: {
 647                 return create_symconst(dbgi, declaration->v.entity);
 648         }
 649         case DECLARATION_TYPE_PARAMETER_ENTITY:
 650         case DECLARATION_TYPE_LOCAL_VARIABLE:
 651         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 652         case DECLARATION_TYPE_GLOBAL_VARIABLE:
 653         case DECLARATION_TYPE_COMPOUND_MEMBER:
 654                 panic("not implemented reference type");
 655         }
 656
 657         panic("reference to declaration with unknown type found");
 658 }
 659
 660 static ir_node *call_expression_to_firm(const call_expression_t *call)
 661 {
 662         expression_t  *function = call->function;
 663         ir_node       *callee   = expression_to_firm(function);
 664
 665         assert(function->datatype->type == TYPE_FUNCTION);
 666         function_type_t *function_type = (function_type_t*) function->datatype;
 667
 668         int              n_parameters = 0;
 669         call_argument_t *argument     = call->arguments;
 670         for( ; argument != NULL; argument = argument->next) {
 671                 ++n_parameters;
 672         }
 673
 674         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 675         ir_type *new_method_type = NULL;
 676         if(function_type->variadic) {
 677                 /* we need to construct a new method type matching the call
 678                  * arguments... */
 679                 int n_res       = get_method_n_ress(ir_method_type);
 680                 new_method_type = new_type_method(unique_ident("calltype"),
 681                                                   n_parameters, n_res);
 682                 set_method_calling_convention(new_method_type,
 683                                get_method_calling_convention(ir_method_type));
 684                 set_method_additional_properties(new_method_type,
 685                                get_method_additional_properties(ir_method_type));
 686
 687                 for(int i = 0; i < n_res; ++i) {
 688                         set_method_res_type(new_method_type, i,
 689                                             get_method_res_type(ir_method_type, i));
 690                 }
 691         }
 692         ir_node *in[n_parameters];
 693
 694         argument = call->arguments;
 695         int n = 0;
 696         for( ; argument != NULL; argument = argument->next) {
 697                 expression_t *expression = argument->expression;
 698                 ir_node      *arg_node   = expression_to_firm(expression);
 699
 700                 in[n] = arg_node;
 701                 if(new_method_type != NULL) {
 702                         ir_type *irtype = get_ir_type(expression->datatype);
 703                         set_method_param_type(new_method_type, n, irtype);
 704                 }
 705
 706                 n++;
 707         }
 708         assert(n == n_parameters);
 709
 710         if(new_method_type != NULL)
 711                 ir_method_type = new_method_type;
 712
 713         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 714         ir_node  *store = get_store();
 715         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 716                                      ir_method_type);
 717         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 718         set_store(mem);
 719
 720         type_t  *result_type = function_type->result_type;
 721         ir_node *result      = NULL;
 722         if(result_type != type_void) {
 723                 ir_mode *mode    = get_ir_mode(result_type);
 724                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 725                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 726         }
 727
 728         return result;
 729 }
 730
 731 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 732                                           dbg_info *dbgi)
 733 {
 734         ir_mode *mode     = get_ir_mode(type);
 735         ir_node *memory   = get_store();
 736         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 737         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 738         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 739         set_store(load_mem);
 740
 741         return load_res;
 742 }
 743
 744 static ir_node *expression_addr(const expression_t *expression)
 745 {
 746         (void) expression;
 747         panic("expression_addr not implemented yet");
 748         return NULL;
 749 }
 750
 751 static void set_value_for_expression(const expression_t *expression,
 752                                      ir_node *value)
 753 {
 754         (void) expression;
 755         (void) value;
 756         panic("set_value_for_expression not implemented yet");
 757 }
 758
 759 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 760 {
 761         ir_mode *value_mode = get_irn_mode(value);
 762
 763         if(value_mode == dest_mode)
 764                 return value;
 765
 766         if(dest_mode == mode_b) {
 767                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 768                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 769                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 770                 return proj;
 771         }
 772
 773         return new_d_Conv(dbgi, value, dest_mode);
 774 }
 775
 776 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 777 {
 778         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 779         type_t   *type = expression->expression.datatype;
 780         ir_mode  *mode = get_ir_mode(type);
 781
 782         if(expression->type == UNEXPR_TAKE_ADDRESS)
 783                 return expression_addr(expression->value);
 784
 785         const expression_t *value      = expression->value;
 786         ir_node            *value_node = expression_to_firm(value);
 787
 788         switch(expression->type) {
 789         case UNEXPR_NEGATE:
 790                 return new_d_Minus(dbgi, value_node, mode);
 791         case UNEXPR_PLUS:
 792                 return value_node;
 793         case UNEXPR_BITWISE_NEGATE:
 794                 return new_d_Not(dbgi, value_node, mode);
 795         case UNEXPR_NOT:
 796                 if(get_irn_mode(value_node) != mode_b) {
 797                         value_node = create_conv(dbgi, value_node, mode_b);
 798                 }
 799                 value_node = new_d_Not(dbgi, value_node, mode_b);
 800                 if(mode != mode_b) {
 801                         value_node = create_conv(dbgi, value_node, mode);
 802                 }
 803                 return value_node;
 804         case UNEXPR_DEREFERENCE:
 805                 return load_from_expression_addr(type, value_node, dbgi);
 806         case UNEXPR_POSTFIX_INCREMENT: {
 807                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 808                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 809                 set_value_for_expression(value, new_value);
 810                 return value_node;
 811         }
 812         case UNEXPR_POSTFIX_DECREMENT: {
 813                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 814                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 815                 set_value_for_expression(value, new_value);
 816                 return value_node;
 817         }
 818         case UNEXPR_PREFIX_INCREMENT: {
 819                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 820                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 821                 set_value_for_expression(value, new_value);
 822                 return new_value;
 823         }
 824         case UNEXPR_PREFIX_DECREMENT: {
 825                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 826                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 827                 set_value_for_expression(value, new_value);
 828                 return new_value;
 829         }
 830         case UNEXPR_CAST:
 831                 return create_conv(dbgi, value_node, mode);
 832
 833         case UNEXPR_TAKE_ADDRESS:
 834         case UNEXPR_INVALID:
 835                 break;
 836         }
 837         panic("invalid UNEXPR type found");
 838 }
 839
 840 static ir_node *expression_to_firm(const expression_t *expression)
 841 {
 842         switch(expression->type) {
 843         case EXPR_CONST:
 844                 return const_to_firm((const const_t*) expression);
 845         case EXPR_STRING_LITERAL:
 846                 return string_literal_to_firm((const string_literal_t*) expression);
 847         case EXPR_REFERENCE:
 848                 return reference_expression_to_firm((const reference_expression_t*)
 849                                                     expression);
 850         case EXPR_CALL:
 851                 return call_expression_to_firm((const call_expression_t*) expression);
 852         case EXPR_UNARY:
 853                 return unary_expression_to_firm((const unary_expression_t*) expression);
 854         default:
 855                 break;
 856         }
 857         panic("unsupported expression found");
 858 }
 859
 860
 861
 862 static void statement_to_firm(statement_t *statement);
 863
 864 static void return_statement_to_firm(return_statement_t *statement)
 865 {
 866         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
 867         ir_node  *ret;
 868
 869         if(statement->return_value != NULL) {
 870                 ir_node *retval = expression_to_firm(statement->return_value);
 871                 ir_node *in[1];
 872
 873                 in[0] = retval;
 874                 ret   = new_d_Return(dbgi, get_store(), 1, in);
 875         } else {
 876                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
 877         }
 878         ir_node *end_block = get_irg_end_block(current_ir_graph);
 879         add_immBlock_pred(end_block, ret);
 880
 881         set_cur_block(NULL);
 882 }
 883
 884 static void compound_statement_to_firm(compound_statement_t *compound)
 885 {
 886         statement_t *statement = compound->statements;
 887         for( ; statement != NULL; statement = statement->next) {
 888                 //context2firm(&statement->context);
 889                 statement_to_firm(statement);
 890         }
 891 }
 892
 893 static void expression_statement_to_firm(expression_statement_t *statement)
 894 {
 895         expression_to_firm(statement->expression);
 896 }
 897
 898 static void if_statement_to_firm(if_statement_t *statement)
 899 {
 900         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
 901         ir_node  *condition = expression_to_firm(statement->condition);
 902         assert(condition != NULL);
 903         assert(get_irn_mode(condition) == mode_b);
 904
 905         ir_node *cond       = new_d_Cond(dbgi, condition);
 906         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 907         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 908
 909         ir_node *fallthrough_block = new_immBlock();
 910
 911         /* the true (blocks) */
 912         ir_node *true_block = new_immBlock();
 913         add_immBlock_pred(true_block, true_proj);
 914         mature_immBlock(true_block);
 915
 916         statement_to_firm(statement->true_statement);
 917         if(get_cur_block() != NULL) {
 918                 ir_node *jmp = new_Jmp();
 919                 add_immBlock_pred(fallthrough_block, jmp);
 920         }
 921
 922         /* the false (blocks) */
 923         if(statement->false_statement != NULL) {
 924                 ir_node *false_block = new_immBlock();
 925                 add_immBlock_pred(false_block, false_proj);
 926                 mature_immBlock(false_block);
 927
 928                 statement_to_firm(statement->false_statement);
 929                 if(get_cur_block() != NULL) {
 930                         ir_node *jmp = new_Jmp();
 931                         add_immBlock_pred(fallthrough_block, jmp);
 932                 }
 933         } else {
 934                 add_immBlock_pred(fallthrough_block, false_proj);
 935         }
 936         mature_immBlock(fallthrough_block);
 937
 938         set_cur_block(fallthrough_block);
 939 }
 940
 941 static void statement_to_firm(statement_t *statement)
 942 {
 943         switch(statement->type) {
 944         case STATEMENT_COMPOUND:
 945                 compound_statement_to_firm((compound_statement_t*) statement);
 946                 return;
 947         case STATEMENT_RETURN:
 948                 return_statement_to_firm((return_statement_t*) statement);
 949                 return;
 950         case STATEMENT_EXPRESSION:
 951                 expression_statement_to_firm((expression_statement_t*) statement);
 952                 return;
 953         case STATEMENT_IF:
 954                 if_statement_to_firm((if_statement_t*) statement);
 955                 return;
 956         default:
 957                 break;
 958         }
 959         panic("Statement not implemented\n");
 960 }
 961
 962 static int get_function_n_local_vars(declaration_t *declaration)
 963 {
 964         (void) declaration;
 965         /* TODO */
 966         return 30;
 967 }
 968
 969 static void initialize_function_parameters(declaration_t *declaration)
 970 {
 971         int            n         = 0;
 972         declaration_t *parameter = declaration->context.declarations;
 973         for( ; parameter != NULL; parameter = parameter->next) {
 974                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
 975
 976                 parameter->declaration_type = DECLARATION_TYPE_PARAMETER;
 977                 parameter->v.value_number   = n;
 978                 ++n;
 979         }
 980 }
 981
 982 static void create_function(declaration_t *declaration)
 983 {
 984         ir_entity *entity = get_function_entity(declaration);
 985
 986         if(declaration->init.statement == NULL)
 987                 return;
 988
 989         initialize_function_parameters(declaration);
 990
 991         int        n_local_vars = get_function_n_local_vars(declaration);
 992         ir_graph  *irg          = new_ir_graph(entity, n_local_vars);
 993         ir_node   *first_block  = get_cur_block();
 994
 995         statement_to_firm(declaration->init.statement);
 996
 997         ir_node *end_block = get_irg_end_block(irg);
 998
 999         /* do we have a return statement yet? */
1000         if(get_cur_block() != NULL) {
1001                 ir_node *ret = new_Return(get_store(), 0, NULL);
1002                 add_immBlock_pred(end_block, ret);
1003         }
1004
1005         mature_immBlock(first_block);
1006         mature_immBlock(end_block);
1007
1008         irg_finalize_cons(irg);
1009
1010         /* finalize the frame type */
1011         ir_type *frame_type = get_irg_frame_type(irg);
1012         int      n          = get_compound_n_members(frame_type);
1013         int      align_all  = 4;
1014         int      offset     = 0;
1015         for(int i = 0; i < n; ++i) {
1016                 ir_entity *entity      = get_compound_member(frame_type, i);
1017                 ir_type   *entity_type = get_entity_type(entity);
1018
1019                 int align = get_type_alignment_bytes(entity_type);
1020                 if(align > align_all)
1021                         align_all = align;
1022                 int misalign = 0;
1023                 if(align > 0) {
1024                         misalign  = offset % align;
1025                         offset   += misalign;
1026                 }
1027
1028                 set_entity_offset(entity, offset);
1029                 offset += get_type_size_bytes(entity_type);
1030         }
1031         set_type_size_bytes(frame_type, offset);
1032         set_type_alignment_bytes(frame_type, align_all);
1033         set_type_state(frame_type, layout_fixed);
1034
1035         irg_vrfy(irg);
1036 }
1037
1038 static void context_to_firm(context_t *context)
1039 {
1040         declaration_t *declaration = context->declarations;
1041         for( ; declaration != NULL; declaration = declaration->next) {
1042                 type_t *type = declaration->type;
1043                 if(type->type == TYPE_FUNCTION) {
1044                         create_function(declaration);
1045                 } else {
1046                         /* TODO... */
1047                 }
1048         }
1049 }
1050
1051 void translation_unit_to_firm(translation_unit_t *unit)
1052 {
1053         /* remove me later TODO FIXME */
1054         (void) get_type_size;
1055
1056         context_to_firm(& unit->context);
1057 }