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 "token_t.h"
  16 #include "type_t.h"
  17 #include "ast_t.h"
  18
  19 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  20
  21 static ir_type *ir_type_const_char;
  22 static ir_type *ir_type_void;
  23 static ir_type *ir_type_int;
  24 static ir_type *ir_type_void_ptr;
  25
  26 static type_t *type_const_char;
  27 static type_t *type_void;
  28 static type_t *type_int;
  29
  30 static int next_value_number_function;
  31 static ir_node *continue_label;
  32 static ir_node *break_label;
  33 static ir_node *current_switch_cond;
  34
  35 typedef enum declaration_type_t {
  36         DECLARATION_TYPE_UNKNOWN,
  37         DECLARATION_TYPE_FUNCTION,
  38         DECLARATION_TYPE_GLOBAL_VARIABLE,
  39         DECLARATION_TYPE_LOCAL_VARIABLE,
  40         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  41         DECLARATION_TYPE_COMPOUND_MEMBER
  42 } declaration_type_t;
  43
  44 static ir_type *get_ir_type(type_t *type);
  45
  46 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  47 {
  48         (void) pos;
  49 #if 0
  50         const declaration_t *declaration = & value_numbers[pos]->declaration;
  51
  52         print_warning_prefix(declaration->source_position);
  53         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  54                         declaration->symbol->string);
  55 #endif
  56         fprintf(stderr, "Some variable might be used uninitialized\n");
  57         return new_r_Unknown(irg, mode);
  58 }
  59
  60 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  61 {
  62         const source_position_t *pos = (const source_position_t*) dbg;
  63         if(pos == NULL)
  64                 return 0;
  65         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  66                                    pos->linenr);
  67 }
  68
  69 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  70 {
  71         const source_position_t *pos = (const source_position_t*) dbg;
  72         if(pos == NULL)
  73                 return NULL;
  74         if(line != NULL)
  75                 *line = pos->linenr;
  76         return pos->input_name;
  77 }
  78
  79 void init_ast2firm(void)
  80 {
  81         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  82         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  83         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  84
  85         ir_type_int        = get_ir_type(type_int);
  86         ir_type_const_char = get_ir_type(type_const_char);
  87         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  88                                                        type in firm */
  89         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  90                                               ir_type_void, mode_P_data);
  91
  92         type_void->firm_type = ir_type_void;
  93 }
  94
  95 void exit_ast2firm(void)
  96 {
  97 }
  98
  99 static unsigned unique_id = 0;
 100
 101 static ident *unique_ident(const char *tag)
 102 {
 103         char buf[256];
 104
 105         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 106         unique_id++;
 107         return new_id_from_str(buf);
 108 }
 109
 110 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 111 {
 112         switch(atomic_type->atype) {
 113         case ATOMIC_TYPE_SCHAR:
 114         case ATOMIC_TYPE_CHAR:
 115                 return mode_Bs;
 116         case ATOMIC_TYPE_UCHAR:
 117                 return mode_Bu;
 118         case ATOMIC_TYPE_SHORT:
 119                 return mode_Hs;
 120         case ATOMIC_TYPE_USHORT:
 121                 return mode_Hu;
 122         case ATOMIC_TYPE_LONG:
 123         case ATOMIC_TYPE_INT:
 124                 return mode_Is;
 125         case ATOMIC_TYPE_ULONG:
 126         case ATOMIC_TYPE_UINT:
 127                 return mode_Iu;
 128         case ATOMIC_TYPE_LONGLONG:
 129                 return mode_Ls;
 130         case ATOMIC_TYPE_ULONGLONG:
 131                 return mode_Lu;
 132         case ATOMIC_TYPE_FLOAT:
 133                 return mode_F;
 134         case ATOMIC_TYPE_DOUBLE:
 135                 return mode_D;
 136         case ATOMIC_TYPE_LONG_DOUBLE:
 137                 return mode_E;
 138         case ATOMIC_TYPE_BOOL:
 139                 return mode_b;
 140 #ifdef PROVIDE_COMPLEX
 141         case ATOMIC_TYPE_FLOAT_COMPLEX:
 142         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 143         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 144                 panic("complex lowering not implemented yet");
 145                 break;
 146         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 147         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 148         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 149                 panic("imaginary lowering not implemented yet");
 150                 break;
 151 #endif
 152         case ATOMIC_TYPE_VOID:
 153                 /* firm has no real void... */
 154                 return mode_Is;
 155         case ATOMIC_TYPE_INVALID:
 156                 break;
 157         }
 158         panic("Encountered unknown atomic type");
 159 }
 160
 161
 162 static unsigned get_type_size(type_t *type);
 163
 164 static unsigned get_atomic_type_size(const atomic_type_t *type)
 165 {
 166         switch(type->atype) {
 167         case ATOMIC_TYPE_CHAR:
 168         case ATOMIC_TYPE_SCHAR:
 169         case ATOMIC_TYPE_UCHAR:
 170                 return 1;
 171
 172         case ATOMIC_TYPE_SHORT:
 173         case ATOMIC_TYPE_USHORT:
 174                 return 2;
 175
 176         case ATOMIC_TYPE_BOOL:
 177         case ATOMIC_TYPE_INT:
 178         case ATOMIC_TYPE_UINT:
 179         case ATOMIC_TYPE_LONG:
 180         case ATOMIC_TYPE_ULONG:
 181         case ATOMIC_TYPE_FLOAT:
 182                 return 4;
 183
 184         case ATOMIC_TYPE_LONGLONG:
 185         case ATOMIC_TYPE_ULONGLONG:
 186         case ATOMIC_TYPE_DOUBLE:
 187                 return 8;
 188
 189         case ATOMIC_TYPE_LONG_DOUBLE:
 190                 return 12;
 191
 192         case ATOMIC_TYPE_VOID:
 193                 return 1;
 194
 195         case ATOMIC_TYPE_INVALID:
 196                 break;
 197         }
 198         panic("Trying to determine size of invalid atomic type");
 199 }
 200
 201 static unsigned get_compound_type_size(compound_type_t *type)
 202 {
 203         ir_type *irtype = get_ir_type(&type->type);
 204         return get_type_size_bytes(irtype);
 205 }
 206
 207 static unsigned get_array_type_size(array_type_t *type)
 208 {
 209         ir_type *irtype = get_ir_type(&type->type);
 210         return get_type_size_bytes(irtype);
 211 }
 212
 213 static unsigned get_type_size(type_t *type)
 214 {
 215         type = skip_typeref(type);
 216
 217         switch(type->type) {
 218         case TYPE_ATOMIC:
 219                 return get_atomic_type_size((const atomic_type_t*) type);
 220         case TYPE_ENUM:
 221                 return get_mode_size_bytes(mode_Is);
 222         case TYPE_COMPOUND_UNION:
 223         case TYPE_COMPOUND_STRUCT:
 224                 return get_compound_type_size((compound_type_t*) type);
 225         case TYPE_FUNCTION:
 226                 /* just a pointer to the function */
 227                 return get_mode_size_bytes(mode_P_code);
 228         case TYPE_POINTER:
 229                 return get_mode_size_bytes(mode_P_data);
 230         case TYPE_ARRAY:
 231                 return get_array_type_size((array_type_t*) type);
 232         case TYPE_BUILTIN:
 233         case TYPE_TYPEDEF:
 234         case TYPE_TYPEOF:
 235         case TYPE_INVALID:
 236                 break;
 237         }
 238         panic("Trying to determine size of invalid type");
 239 }
 240
 241 static unsigned count_parameters(const function_type_t *function_type)
 242 {
 243         unsigned count = 0;
 244
 245         function_parameter_t *parameter = function_type->parameters;
 246         for ( ; parameter != NULL; parameter = parameter->next) {
 247                 ++count;
 248         }
 249
 250         return count;
 251 }
 252
 253
 254
 255
 256 static ir_type *create_atomic_type(const atomic_type_t *type)
 257 {
 258         ir_mode *mode   = get_atomic_mode(type);
 259         ident   *id     = get_mode_ident(mode);
 260         ir_type *irtype = new_type_primitive(id, mode);
 261
 262         return irtype;
 263 }
 264
 265 static ir_type *create_method_type(const function_type_t *function_type)
 266 {
 267         type_t  *result_type  = function_type->result_type;
 268
 269         ident   *id           = unique_ident("functiontype");
 270         int      n_parameters = count_parameters(function_type);
 271         int      n_results    = result_type == type_void ? 0 : 1;
 272         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 273
 274         if(result_type != type_void) {
 275                 ir_type *restype = get_ir_type(result_type);
 276                 set_method_res_type(irtype, 0, restype);
 277         }
 278
 279         function_parameter_t *parameter = function_type->parameters;
 280         int                   n         = 0;
 281         for( ; parameter != NULL; parameter = parameter->next) {
 282                 ir_type *p_irtype = get_ir_type(parameter->type);
 283                 set_method_param_type(irtype, n, p_irtype);
 284                 ++n;
 285         }
 286
 287         if(function_type->variadic || function_type->unspecified_parameters) {
 288                 set_method_variadicity(irtype, variadicity_variadic);
 289         }
 290
 291         return irtype;
 292 }
 293
 294 static ir_type *create_pointer_type(pointer_type_t *type)
 295 {
 296         type_t  *points_to = type->points_to;
 297         ir_type *ir_points_to;
 298         /* Avoid endless recursion if the points_to type contains this poiner type
 299          * again (might be a struct). We therefore first create a void* pointer
 300          * and then set the real points_to type
 301          */
 302         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 303                                             ir_type_void, mode_P_data);
 304         type->type.firm_type  = ir_type;
 305
 306         ir_points_to = get_ir_type(points_to);
 307         set_pointer_points_to_type(ir_type, ir_points_to);
 308
 309         return ir_type;
 310 }
 311
 312 static ir_type *create_array_type(array_type_t *type)
 313 {
 314         type_t  *element_type    = type->element_type;
 315         ir_type *ir_element_type = get_ir_type(element_type);
 316
 317         /* TODO... */
 318         int n_elements = 0;
 319         panic("TODO arraytpye size not implemented yet");
 320
 321         ir_type *ir_type = new_type_array(unique_ident("array"), 1, ir_element_type);
 322         set_array_bounds_int(ir_type, 0, 0, n_elements);
 323
 324         size_t elemsize = get_type_size_bytes(ir_element_type);
 325         int align = get_type_alignment_bytes(ir_element_type);
 326         if(elemsize % align > 0) {
 327                 elemsize += align - (elemsize % align);
 328         }
 329         set_type_size_bytes(ir_type, n_elements * elemsize);
 330         set_type_alignment_bytes(ir_type, align);
 331         set_type_state(ir_type, layout_fixed);
 332
 333         return ir_type;
 334 }
 335
 336 #define INVALID_TYPE ((ir_type_ptr)-1)
 337
 338 static ir_type *create_struct_type(compound_type_t *type)
 339 {
 340         symbol_t *symbol = type->declaration->symbol;
 341         ident    *id;
 342         if(symbol != NULL) {
 343                 id = unique_ident(symbol->string);
 344         } else {
 345                 id = unique_ident("__anonymous_struct");
 346         }
 347         ir_type *ir_type = new_type_struct(id);
 348
 349         type->type.firm_type = ir_type;
 350
 351         int align_all = 1;
 352         int offset    = 0;
 353         declaration_t *entry = type->declaration->context.declarations;
 354         for( ; entry != NULL; entry = entry->next) {
 355                 if(entry->namespace != NAMESPACE_NORMAL)
 356                         continue;
 357
 358                 ident       *ident         = new_id_from_str(entry->symbol->string);
 359                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 360
 361                 int entry_size      = get_type_size_bytes(entry_ir_type);
 362                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 363                 int misalign = offset % entry_alignment;
 364                 offset += misalign;
 365
 366                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 367                 set_entity_offset(entity, offset);
 368                 add_struct_member(ir_type, entity);
 369                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 370                 entry->v.entity         = entity;
 371
 372                 offset += entry_size;
 373                 if(entry_alignment > align_all) {
 374                         if(entry_alignment % align_all != 0) {
 375                                 panic("Uneven alignments not supported yet");
 376                         }
 377                         align_all = entry_alignment;
 378                 }
 379         }
 380
 381         int misalign = offset % align_all;
 382         offset += misalign;
 383         set_type_alignment_bytes(ir_type, align_all);
 384         set_type_size_bytes(ir_type, offset);
 385         set_type_state(ir_type, layout_fixed);
 386
 387         return ir_type;
 388 }
 389
 390 static ir_type *create_union_type(compound_type_t *type)
 391 {
 392         declaration_t *declaration = type->declaration;
 393         symbol_t      *symbol      = declaration->symbol;
 394         ident         *id;
 395         if(symbol != NULL) {
 396                 id = unique_ident(symbol->string);
 397         } else {
 398                 id = unique_ident("__anonymous_union");
 399         }
 400         ir_type  *ir_type = new_type_union(id);
 401
 402         type->type.firm_type = ir_type;
 403
 404         int align_all = 1;
 405         int size      = 0;
 406         declaration_t *entry = declaration->context.declarations;
 407         for( ; entry != NULL; entry = entry->next) {
 408                 if(entry->namespace != NAMESPACE_NORMAL)
 409                         continue;
 410
 411                 ident       *ident         = new_id_from_str(entry->symbol->string);
 412                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 413
 414                 int entry_size      = get_type_size_bytes(entry_ir_type);
 415                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 416
 417                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 418                 add_union_member(ir_type, entity);
 419                 set_entity_offset(entity, 0);
 420                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 421                 entry->v.entity         = entity;
 422
 423                 if(entry_size > size) {
 424                         size = entry_size;
 425                 }
 426                 if(entry_alignment > align_all) {
 427                         if(entry_alignment % align_all != 0) {
 428                                 panic("Uneven alignments not supported yet");
 429                         }
 430                         align_all = entry_alignment;
 431                 }
 432         }
 433
 434         set_type_alignment_bytes(ir_type, align_all);
 435         set_type_size_bytes(ir_type, size);
 436         set_type_state(ir_type, layout_fixed);
 437
 438         return ir_type;
 439 }
 440
 441 static ir_type *get_ir_type(type_t *type)
 442 {
 443         assert(type != NULL);
 444
 445         type = skip_typeref(type);
 446
 447         if(type->firm_type != NULL) {
 448                 assert(type->firm_type != INVALID_TYPE);
 449                 return type->firm_type;
 450         }
 451
 452         ir_type *firm_type = NULL;
 453         switch(type->type) {
 454         case TYPE_ATOMIC:
 455                 firm_type = create_atomic_type((atomic_type_t*) type);
 456                 break;
 457         case TYPE_FUNCTION:
 458                 firm_type = create_method_type((function_type_t*) type);
 459                 break;
 460         case TYPE_POINTER:
 461                 firm_type = create_pointer_type((pointer_type_t*) type);
 462                 break;
 463         case TYPE_ARRAY:
 464                 firm_type = create_array_type((array_type_t*) type);
 465                 break;
 466         case TYPE_COMPOUND_STRUCT:
 467                 firm_type = create_struct_type((compound_type_t*) type);
 468                 break;
 469         case TYPE_COMPOUND_UNION:
 470                 firm_type = create_union_type((compound_type_t*) type);
 471                 break;
 472         case TYPE_ENUM:
 473                 firm_type = ir_type_int;
 474                 break;
 475         case TYPE_BUILTIN:
 476         case TYPE_TYPEOF:
 477         case TYPE_TYPEDEF:
 478         case TYPE_INVALID:
 479                 break;
 480         }
 481         if(firm_type == NULL)
 482                 panic("unknown type found");
 483
 484         type->firm_type = firm_type;
 485         return firm_type;
 486 }
 487
 488 static inline ir_mode *get_ir_mode(type_t *type)
 489 {
 490         ir_type *irtype = get_ir_type(type);
 491         ir_mode *mode   = get_type_mode(irtype);
 492         assert(mode != NULL);
 493         return mode;
 494 }
 495
 496 static ir_entity* get_function_entity(declaration_t *declaration)
 497 {
 498         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 499                 return declaration->v.entity;
 500         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 501
 502         symbol_t *symbol = declaration->symbol;
 503         ident    *id     = new_id_from_str(symbol->string);
 504
 505         ir_type  *global_type    = get_glob_type();
 506         ir_type  *ir_type_method = get_ir_type(declaration->type);
 507         assert(is_Method_type(ir_type_method));
 508
 509         type_t    *type   = declaration->type;
 510         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 511         set_entity_ld_ident(entity, id);
 512         if(declaration->storage_class & STORAGE_CLASS_STATIC
 513                         || type->qualifiers & TYPE_QUALIFIER_INLINE) {
 514                 set_entity_visibility(entity, visibility_local);
 515         } else if(declaration->init.statement != NULL) {
 516                 set_entity_visibility(entity, visibility_external_visible);
 517         } else {
 518                 set_entity_visibility(entity, visibility_external_allocated);
 519         }
 520
 521         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 522         declaration->v.entity         = entity;
 523
 524         return entity;
 525 }
 526
 527
 528
 529 static ir_node *expression_to_firm(const expression_t *expression);
 530 static ir_node *_expression_to_firm(const expression_t *expression);
 531
 532 static dbg_info *get_dbg_info(const source_position_t *pos)
 533 {
 534         return (dbg_info*) pos;
 535 }
 536
 537 static ir_node *const_to_firm(const const_t *cnst)
 538 {
 539         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 540         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 541
 542         tarval   *tv;
 543         if(mode_is_float(mode)) {
 544                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 545         } else {
 546                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 547         }
 548
 549         return new_d_Const(dbgi, mode, tv);
 550 }
 551
 552 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 553 {
 554         assert(entity != NULL);
 555         union symconst_symbol sym;
 556         sym.entity_p = entity;
 557         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 558 }
 559
 560 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 561 {
 562         ir_type   *global_type = get_glob_type();
 563         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 564                                                 ir_type_const_char);
 565
 566         ident     *id     = unique_ident("Lstr");
 567         ir_entity *entity = new_entity(global_type, id, type);
 568         set_entity_ld_ident(entity, id);
 569         set_entity_variability(entity, variability_constant);
 570
 571         ir_type    *elem_type = ir_type_const_char;
 572         ir_mode    *mode      = get_type_mode(elem_type);
 573
 574         const char *string = literal->value;
 575         size_t      slen   = strlen(string) + 1;
 576
 577         set_array_lower_bound_int(type, 0, 0);
 578         set_array_upper_bound_int(type, 0, slen);
 579         set_type_size_bytes(type, slen);
 580         set_type_state(type, layout_fixed);
 581
 582         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 583         for(size_t i = 0; i < slen; ++i) {
 584                 tvs[i] = new_tarval_from_long(string[i], mode);
 585         }
 586
 587         set_array_entity_values(entity, tvs, slen);
 588         free(tvs);
 589
 590         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 591
 592         return create_symconst(dbgi, entity);
 593 }
 594
 595 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 596 {
 597         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 598         declaration_t *declaration = ref->declaration;
 599         type_t        *type        = declaration->type;
 600         ir_mode       *mode        = get_ir_mode(type);
 601
 602         switch((declaration_type_t) declaration->declaration_type) {
 603         case DECLARATION_TYPE_UNKNOWN:
 604                 break;
 605         case DECLARATION_TYPE_LOCAL_VARIABLE:
 606                 return get_value(declaration->v.value_number, mode);
 607         case DECLARATION_TYPE_FUNCTION: {
 608                 return create_symconst(dbgi, declaration->v.entity);
 609         }
 610         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 611         case DECLARATION_TYPE_GLOBAL_VARIABLE:
 612         case DECLARATION_TYPE_COMPOUND_MEMBER:
 613                 panic("not implemented reference type");
 614         }
 615
 616         panic("reference to declaration with unknown type found");
 617 }
 618
 619 static ir_node *call_expression_to_firm(const call_expression_t *call)
 620 {
 621         assert(get_cur_block() != NULL);
 622
 623         expression_t  *function = call->function;
 624         ir_node       *callee   = expression_to_firm(function);
 625
 626         assert(function->datatype->type == TYPE_FUNCTION);
 627         function_type_t *function_type = (function_type_t*) function->datatype;
 628
 629         int              n_parameters = 0;
 630         call_argument_t *argument     = call->arguments;
 631         for( ; argument != NULL; argument = argument->next) {
 632                 ++n_parameters;
 633         }
 634
 635         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 636         ir_type *new_method_type = NULL;
 637         if(function_type->variadic || function_type->unspecified_parameters) {
 638                 /* we need to construct a new method type matching the call
 639                  * arguments... */
 640                 int n_res       = get_method_n_ress(ir_method_type);
 641                 new_method_type = new_type_method(unique_ident("calltype"),
 642                                                   n_parameters, n_res);
 643                 set_method_calling_convention(new_method_type,
 644                                get_method_calling_convention(ir_method_type));
 645                 set_method_additional_properties(new_method_type,
 646                                get_method_additional_properties(ir_method_type));
 647
 648                 for(int i = 0; i < n_res; ++i) {
 649                         set_method_res_type(new_method_type, i,
 650                                             get_method_res_type(ir_method_type, i));
 651                 }
 652         }
 653         ir_node *in[n_parameters];
 654
 655         argument = call->arguments;
 656         int n = 0;
 657         for( ; argument != NULL; argument = argument->next) {
 658                 expression_t *expression = argument->expression;
 659                 ir_node      *arg_node   = expression_to_firm(expression);
 660
 661                 in[n] = arg_node;
 662                 if(new_method_type != NULL) {
 663                         ir_type *irtype = get_ir_type(expression->datatype);
 664                         set_method_param_type(new_method_type, n, irtype);
 665                 }
 666
 667                 n++;
 668         }
 669         assert(n == n_parameters);
 670
 671         if(new_method_type != NULL)
 672                 ir_method_type = new_method_type;
 673
 674         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 675         ir_node  *store = get_store();
 676         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 677                                      ir_method_type);
 678         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 679         set_store(mem);
 680
 681         type_t  *result_type = function_type->result_type;
 682         ir_node *result      = NULL;
 683         if(result_type != type_void) {
 684                 ir_mode *mode    = get_ir_mode(result_type);
 685                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 686                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 687         }
 688
 689         return result;
 690 }
 691
 692 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 693                                           dbg_info *dbgi)
 694 {
 695         ir_mode *mode     = get_ir_mode(type);
 696         ir_node *memory   = get_store();
 697         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 698         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 699         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 700         set_store(load_mem);
 701
 702         return load_res;
 703 }
 704
 705 static ir_node *expression_to_addr(const expression_t *expression);
 706
 707 static void set_value_for_expression(const expression_t *expression,
 708                                      ir_node *value)
 709 {
 710         if(expression->type == EXPR_REFERENCE) {
 711                 reference_expression_t *ref = (reference_expression_t*) expression;
 712
 713                 declaration_t *declaration = ref->declaration;
 714                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 715                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 716                         set_value(declaration->v.value_number, value);
 717                         return;
 718                 }
 719         }
 720
 721         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 722         ir_node  *addr      = expression_to_addr(expression);
 723         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 724         ir_node  *memory    = get_store();
 725         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 726         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 727         set_store(store_mem);
 728 }
 729
 730 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 731 {
 732         ir_mode *value_mode = get_irn_mode(value);
 733
 734         if(value_mode == dest_mode)
 735                 return value;
 736
 737         if(dest_mode == mode_b) {
 738                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 739                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 740                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 741                 return proj;
 742         }
 743
 744         return new_d_Conv(dbgi, value, dest_mode);
 745 }
 746
 747 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 748 {
 749         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 750         type_t   *type = expression->expression.datatype;
 751         ir_mode  *mode = get_ir_mode(type);
 752
 753         if(expression->type == UNEXPR_TAKE_ADDRESS)
 754                 return expression_to_addr(expression->value);
 755
 756         const expression_t *value      = expression->value;
 757         ir_node            *value_node = expression_to_firm(value);
 758
 759         switch(expression->type) {
 760         case UNEXPR_NEGATE:
 761                 return new_d_Minus(dbgi, value_node, mode);
 762         case UNEXPR_PLUS:
 763                 return value_node;
 764         case UNEXPR_BITWISE_NEGATE:
 765                 return new_d_Not(dbgi, value_node, mode);
 766         case UNEXPR_NOT:
 767                 if(get_irn_mode(value_node) != mode_b) {
 768                         value_node = create_conv(dbgi, value_node, mode_b);
 769                 }
 770                 value_node = new_d_Not(dbgi, value_node, mode_b);
 771                 if(mode != mode_b) {
 772                         value_node = create_conv(dbgi, value_node, mode);
 773                 }
 774                 return value_node;
 775         case UNEXPR_DEREFERENCE:
 776                 return load_from_expression_addr(type, value_node, dbgi);
 777         case UNEXPR_POSTFIX_INCREMENT: {
 778                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 779                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 780                 set_value_for_expression(value, new_value);
 781                 return value_node;
 782         }
 783         case UNEXPR_POSTFIX_DECREMENT: {
 784                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 785                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 786                 set_value_for_expression(value, new_value);
 787                 return value_node;
 788         }
 789         case UNEXPR_PREFIX_INCREMENT: {
 790                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 791                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 792                 set_value_for_expression(value, new_value);
 793                 return new_value;
 794         }
 795         case UNEXPR_PREFIX_DECREMENT: {
 796                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 797                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 798                 set_value_for_expression(value, new_value);
 799                 return new_value;
 800         }
 801         case UNEXPR_CAST:
 802                 return create_conv(dbgi, value_node, mode);
 803
 804         case UNEXPR_TAKE_ADDRESS:
 805         case UNEXPR_INVALID:
 806                 break;
 807         }
 808         panic("invalid UNEXPR type found");
 809 }
 810
 811 static long get_pnc(binary_expression_type_t type)
 812 {
 813         switch(type) {
 814         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 815         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 816         case BINEXPR_LESS:         return pn_Cmp_Lt;
 817         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 818         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 819         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 820         default:
 821                 break;
 822         }
 823         panic("trying to get pn_Cmp from non-comparison binexpr type");
 824 }
 825
 826 static ir_node *create_lazy_op(const binary_expression_t *expression)
 827 {
 828         bool is_or = (expression->type == BINEXPR_LOGICAL_OR);
 829         assert(is_or || expression->type == BINEXPR_LOGICAL_AND);
 830
 831         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 832         ir_node  *val1 = expression_to_firm(expression->left);
 833         val1           = create_conv(dbgi, val1, mode_b);
 834
 835         ir_node *cond       = new_d_Cond(dbgi, val1);
 836         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 837         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 838
 839         ir_node *fallthrough_block = new_immBlock();
 840
 841         /* the true case */
 842         ir_node *calc_val2_block = new_immBlock();
 843         if(is_or) {
 844                 add_immBlock_pred(calc_val2_block, false_proj);
 845         } else {
 846                 add_immBlock_pred(calc_val2_block, true_proj);
 847         }
 848
 849         mature_immBlock(calc_val2_block);
 850
 851         ir_node *val2 = expression_to_firm(expression->right);
 852         val2          = create_conv(dbgi, val2, mode_b);
 853         if(get_cur_block() != NULL) {
 854                 ir_node *jmp = new_d_Jmp(dbgi);
 855                 add_immBlock_pred(fallthrough_block, jmp);
 856         }
 857
 858         /* fallthrough */
 859         ir_node *constb;
 860         if(is_or) {
 861                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_true());
 862                 add_immBlock_pred(fallthrough_block, true_proj);
 863         } else {
 864                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_false());
 865                 add_immBlock_pred(fallthrough_block, false_proj);
 866         }
 867         mature_immBlock(fallthrough_block);
 868
 869         set_cur_block(fallthrough_block);
 870
 871         ir_node *in[2] = { val2, constb };
 872         ir_node *val   = new_d_Phi(dbgi, 2, in, mode_b);
 873
 874         return val;
 875 }
 876
 877 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 878                                             ir_node *right, ir_mode *mode);
 879
 880 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 881                                         create_arithmetic_func func)
 882 {
 883         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 884         ir_node  *left  = expression_to_firm(expression->left);
 885         ir_node  *right = expression_to_firm(expression->right);
 886         type_t   *type  = expression->expression.datatype;
 887         ir_mode  *mode  = get_ir_mode(type);
 888         ir_node  *res   = func(dbgi, left, right, mode);
 889
 890         return res;
 891 }
 892
 893 static ir_node *create_add(const binary_expression_t *expression)
 894 {
 895         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 896         ir_node  *left  = expression_to_firm(expression->left);
 897         ir_node  *right = expression_to_firm(expression->right);
 898         type_t   *type  = expression->expression.datatype;
 899         ir_mode  *mode  = get_ir_mode(type);
 900
 901         expression_t *expr_left  = expression->left;
 902         expression_t *expr_right = expression->right;
 903         type_t       *type_left  = skip_typeref(expr_left->datatype);
 904         type_t       *type_right = skip_typeref(expr_right->datatype);
 905
 906         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
 907                 return new_d_Add(dbgi, left, right, mode);
 908         }
 909
 910         ir_node        *pointer;
 911         ir_node        *integer;
 912         pointer_type_t *pointer_type;
 913         if(type_left->type == TYPE_POINTER) {
 914                 pointer      = left;
 915                 integer      = right;
 916                 pointer_type = (pointer_type_t*) type_left;
 917         } else {
 918                 assert(type_right->type == TYPE_POINTER);
 919                 pointer      = right;
 920                 integer      = left;
 921                 pointer_type = (pointer_type_t*) type_right;
 922         }
 923
 924         type_t   *points_to = pointer_type->points_to;
 925         unsigned  elem_size = get_type_size(points_to);
 926
 927         assert(elem_size >= 1);
 928         if(elem_size > 1) {
 929                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
 930                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
 931                 integer = mul;
 932         }
 933
 934         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
 935
 936         return res;
 937 }
 938
 939 static ir_node *create_sub(const binary_expression_t *expression)
 940 {
 941         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 942         ir_node  *left  = expression_to_firm(expression->left);
 943         ir_node  *right = expression_to_firm(expression->right);
 944         type_t   *type  = expression->expression.datatype;
 945         ir_mode  *mode  = get_ir_mode(type);
 946
 947         expression_t *expr_left  = expression->left;
 948         expression_t *expr_right = expression->right;
 949         type_t       *type_left  = skip_typeref(expr_left->datatype);
 950         type_t       *type_right = skip_typeref(expr_right->datatype);
 951
 952         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
 953                         || (type_left->type == TYPE_POINTER
 954                                 && type_right->type == TYPE_POINTER)) {
 955                 return new_d_Sub(dbgi, left, right, mode);
 956         }
 957
 958         assert(type_right->type == TYPE_POINTER);
 959         ir_node        *pointer      = left;
 960         ir_node        *integer      = right;
 961         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
 962
 963         type_t   *points_to = pointer_type->points_to;
 964         unsigned  elem_size = get_type_size(points_to);
 965
 966         assert(elem_size >= 1);
 967         if(elem_size > 1) {
 968                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
 969                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
 970                 integer = mul;
 971         }
 972
 973         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
 974
 975         return res;
 976 }
 977
 978
 979
 980 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
 981 {
 982         binary_expression_type_t type = expression->type;
 983         switch(type) {
 984         case BINEXPR_EQUAL:
 985         case BINEXPR_NOTEQUAL:
 986         case BINEXPR_LESS:
 987         case BINEXPR_LESSEQUAL:
 988         case BINEXPR_GREATER:
 989         case BINEXPR_GREATEREQUAL: {
 990                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 991                 ir_node *left  = expression_to_firm(expression->left);
 992                 ir_node *right = expression_to_firm(expression->right);
 993                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
 994                 long     pnc   = get_pnc(type);
 995                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
 996                 return proj;
 997         }
 998         case BINEXPR_ASSIGN: {
 999                 ir_node *right = expression_to_firm(expression->right);
1000                 set_value_for_expression(expression->left, right);
1001                 return right;
1002         }
1003         case BINEXPR_ADD:
1004                 return create_add(expression);
1005         case BINEXPR_SUB:
1006                 return create_sub(expression);
1007         case BINEXPR_MUL:
1008                 return create_arithmetic_binop(expression, new_d_Mul);
1009         case BINEXPR_BITWISE_AND:
1010                 return create_arithmetic_binop(expression, new_d_And);
1011         case BINEXPR_BITWISE_OR:
1012                 return create_arithmetic_binop(expression, new_d_Or);
1013         case BINEXPR_BITWISE_XOR:
1014                 return create_arithmetic_binop(expression, new_d_Eor);
1015         case BINEXPR_SHIFTLEFT:
1016                 return create_arithmetic_binop(expression, new_d_Shl);
1017         case BINEXPR_SHIFTRIGHT:
1018                 return create_arithmetic_binop(expression, new_d_Shr);
1019         case BINEXPR_LOGICAL_AND:
1020         case BINEXPR_LOGICAL_OR:
1021                 return create_lazy_op(expression);
1022         default:
1023                 panic("TODO binexpr type");
1024         }
1025 }
1026
1027 static ir_node *array_access_addr(const array_access_expression_t *expression)
1028 {
1029         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1030
1031         ir_node *base_addr = expression_to_firm(expression->array_ref);
1032         ir_node *offset    = expression_to_firm(expression->index);
1033         offset             = create_conv(dbgi, offset, mode_Iu);
1034
1035         unsigned elem_size       = get_type_size(expression->expression.datatype);
1036         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1037         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1038                                              mode_Iu);
1039         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1040
1041         return result;
1042 }
1043
1044 static ir_node *array_access_to_firm(
1045                 const array_access_expression_t *expression)
1046 {
1047
1048         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1049         ir_node  *addr = array_access_addr(expression);
1050         type_t   *type = expression->expression.datatype;
1051
1052         return load_from_expression_addr(type, addr, dbgi);
1053 }
1054
1055 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1056 {
1057         type_t *type = expression->type;
1058         if(type == NULL) {
1059                 type = expression->size_expression->datatype;
1060                 assert(type != NULL);
1061         }
1062
1063         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1064         unsigned  size      = get_type_size(type);
1065         ir_node  *size_node = new_Const_long(mode, size);
1066
1067         return size_node;
1068 }
1069
1070 static ir_node *expression_to_addr(const expression_t *expression)
1071 {
1072         switch(expression->type) {
1073         case EXPR_ARRAY_ACCESS:
1074                 return array_access_addr((const array_access_expression_t*) expression);
1075         default:
1076                 break;
1077         }
1078         panic("trying to get address of non-lvalue");
1079 }
1080
1081 static ir_node *_expression_to_firm(const expression_t *expression)
1082 {
1083         switch(expression->type) {
1084         case EXPR_CONST:
1085                 return const_to_firm((const const_t*) expression);
1086         case EXPR_STRING_LITERAL:
1087                 return string_literal_to_firm((const string_literal_t*) expression);
1088         case EXPR_REFERENCE:
1089                 return reference_expression_to_firm(
1090                                 (const reference_expression_t*) expression);
1091         case EXPR_CALL:
1092                 return call_expression_to_firm((const call_expression_t*) expression);
1093         case EXPR_UNARY:
1094                 return unary_expression_to_firm((const unary_expression_t*) expression);
1095         case EXPR_BINARY:
1096                 return binary_expression_to_firm(
1097                                 (const binary_expression_t*) expression);
1098         case EXPR_ARRAY_ACCESS:
1099                 return array_access_to_firm(
1100                                 (const array_access_expression_t*) expression);
1101         case EXPR_SIZEOF:
1102                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1103         default:
1104                 break;
1105         }
1106         panic("unsupported expression found");
1107 }
1108
1109 static ir_node *expression_to_firm(const expression_t *expression)
1110 {
1111         ir_node *res  = _expression_to_firm(expression);
1112
1113         if(expression->datatype == type_void)
1114                 return NULL;
1115
1116         ir_mode *mode = get_ir_mode(expression->datatype);
1117         res           = create_conv(NULL, res, mode);
1118         return res;
1119 }
1120
1121
1122 static void statement_to_firm(statement_t *statement);
1123
1124 static void return_statement_to_firm(return_statement_t *statement)
1125 {
1126         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1127         ir_node  *ret;
1128
1129         if(statement->return_value != NULL) {
1130                 ir_node *retval = expression_to_firm(statement->return_value);
1131                 ir_node *in[1];
1132
1133                 in[0] = retval;
1134                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1135         } else {
1136                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1137         }
1138         ir_node *end_block = get_irg_end_block(current_ir_graph);
1139         add_immBlock_pred(end_block, ret);
1140
1141         set_cur_block(NULL);
1142 }
1143
1144 static void compound_statement_to_firm(compound_statement_t *compound)
1145 {
1146         statement_t *statement = compound->statements;
1147         for( ; statement != NULL; statement = statement->next) {
1148                 //context2firm(&statement->context);
1149                 statement_to_firm(statement);
1150         }
1151 }
1152
1153 static void expression_statement_to_firm(expression_statement_t *statement)
1154 {
1155         expression_to_firm(statement->expression);
1156 }
1157
1158 static void if_statement_to_firm(if_statement_t *statement)
1159 {
1160         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
1161         ir_node  *condition = _expression_to_firm(statement->condition);
1162         assert(condition != NULL);
1163
1164         /* make sure we have a mode_b condition */
1165         condition = create_conv(dbgi, condition, mode_b);
1166
1167         ir_node *cond       = new_d_Cond(dbgi, condition);
1168         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1169         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1170
1171         ir_node *fallthrough_block = new_immBlock();
1172
1173         /* the true (blocks) */
1174         ir_node *true_block = new_immBlock();
1175         add_immBlock_pred(true_block, true_proj);
1176         mature_immBlock(true_block);
1177
1178         statement_to_firm(statement->true_statement);
1179         if(get_cur_block() != NULL) {
1180                 ir_node *jmp = new_Jmp();
1181                 add_immBlock_pred(fallthrough_block, jmp);
1182         }
1183
1184         /* the false (blocks) */
1185         if(statement->false_statement != NULL) {
1186                 ir_node *false_block = new_immBlock();
1187                 add_immBlock_pred(false_block, false_proj);
1188                 mature_immBlock(false_block);
1189
1190                 statement_to_firm(statement->false_statement);
1191                 if(get_cur_block() != NULL) {
1192                         ir_node *jmp = new_Jmp();
1193                         add_immBlock_pred(fallthrough_block, jmp);
1194                 }
1195         } else {
1196                 add_immBlock_pred(fallthrough_block, false_proj);
1197         }
1198         mature_immBlock(fallthrough_block);
1199
1200         set_cur_block(fallthrough_block);
1201 }
1202
1203 static void while_statement_to_firm(while_statement_t *statement)
1204 {
1205         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1206
1207         ir_node *jmp = NULL;
1208         if(get_cur_block() != NULL) {
1209                 jmp = new_Jmp();
1210         }
1211
1212         /* create the header block */
1213         ir_node *header_block = new_immBlock();
1214         if(jmp != NULL) {
1215                 add_immBlock_pred(header_block, jmp);
1216         }
1217
1218         /* create the condition */
1219         ir_node *condition = _expression_to_firm(statement->condition);
1220         condition          = create_conv(dbgi, condition, mode_b);
1221
1222         ir_node *cond       = new_d_Cond(dbgi, condition);
1223         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1224         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1225
1226         /* the false block */
1227         ir_node *false_block = new_immBlock();
1228         add_immBlock_pred(false_block, false_proj);
1229
1230         /* the loop body */
1231         ir_node *body_block = new_immBlock();
1232         add_immBlock_pred(body_block, true_proj);
1233         mature_immBlock(body_block);
1234
1235         ir_node *old_continue_label = continue_label;
1236         ir_node *old_break_label    = break_label;
1237         continue_label              = header_block;
1238         break_label                 = false_block;
1239
1240         statement_to_firm(statement->body);
1241
1242         assert(continue_label == header_block);
1243         assert(break_label    == false_block);
1244         continue_label = old_continue_label;
1245         break_label    = old_break_label;
1246
1247         if(get_cur_block() != NULL) {
1248                 ir_node *jmp = new_Jmp();
1249                 add_immBlock_pred(header_block, jmp);
1250         }
1251
1252         mature_immBlock(header_block);
1253         mature_immBlock(false_block);
1254
1255         set_cur_block(false_block);
1256 }
1257
1258 static void do_while_statement_to_firm(do_while_statement_t *statement)
1259 {
1260         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1261
1262         ir_node *jmp = NULL;
1263         if(get_cur_block() != NULL) {
1264                 jmp = new_Jmp();
1265         }
1266
1267         /* create the header block */
1268         ir_node *header_block = new_immBlock();
1269
1270         /* the false block */
1271         ir_node *false_block = new_immBlock();
1272
1273         /* the loop body */
1274         ir_node *body_block = new_immBlock();
1275         if(jmp != NULL) {
1276                 add_immBlock_pred(body_block, jmp);
1277         }
1278
1279         ir_node *old_continue_label = continue_label;
1280         ir_node *old_break_label    = break_label;
1281         continue_label              = header_block;
1282         break_label                 = false_block;
1283
1284         statement_to_firm(statement->body);
1285
1286         assert(continue_label == header_block);
1287         assert(break_label    == false_block);
1288         continue_label = old_continue_label;
1289         break_label    = old_break_label;
1290
1291         if(get_cur_block() == NULL) {
1292                 mature_immBlock(header_block);
1293                 mature_immBlock(body_block);
1294                 return;
1295         }
1296
1297         ir_node *body_jmp = new_Jmp();
1298         add_immBlock_pred(header_block, body_jmp);
1299         mature_immBlock(header_block);
1300
1301         /* create the condition */
1302         ir_node *condition = _expression_to_firm(statement->condition);
1303         condition          = create_conv(dbgi, condition, mode_b);
1304
1305         ir_node *cond       = new_d_Cond(dbgi, condition);
1306         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1307         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1308
1309         add_immBlock_pred(body_block, true_proj);
1310         mature_immBlock(body_block);
1311
1312         add_immBlock_pred(false_block, false_proj);
1313         mature_immBlock(false_block);
1314
1315         set_cur_block(false_block);
1316 }
1317
1318 static void for_statement_to_firm(for_statement_t *statement)
1319 {
1320         dbg_info *const dbgi = get_dbg_info(&statement->statement.source_position);
1321
1322         ir_node *jmp = NULL;
1323         if (get_cur_block() != NULL) {
1324                 if(statement->initialisation != NULL) {
1325                         expression_to_firm(statement->initialisation);
1326                 }
1327                 jmp = new_Jmp();
1328         }
1329
1330         /* create the step block */
1331         ir_node *const step_block = new_immBlock();
1332         expression_to_firm(statement->step);
1333         ir_node *const step_jmp   = new_Jmp();
1334
1335         /* create the header block */
1336         ir_node *const header_block = new_immBlock();
1337         if (jmp != NULL) {
1338                 add_immBlock_pred(header_block, jmp);
1339         }
1340         add_immBlock_pred(header_block, step_jmp);
1341
1342         /* create the condition */
1343         ir_node *const cond_expr = _expression_to_firm(statement->condition);
1344         ir_node *const condition = create_conv(dbgi, cond_expr, mode_b);
1345
1346         ir_node *const cond       = new_d_Cond(dbgi, condition);
1347         ir_node *const true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1348         ir_node *const false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1349
1350         /* the false block */
1351         ir_node *const false_block = new_immBlock();
1352         add_immBlock_pred(false_block, false_proj);
1353
1354         /* the loop body */
1355         ir_node *const body_block = new_immBlock();
1356         add_immBlock_pred(body_block, true_proj);
1357         mature_immBlock(body_block);
1358
1359         ir_node *const old_continue_label = continue_label;
1360         ir_node *const old_break_label    = break_label;
1361         continue_label = step_block;
1362         break_label    = false_block;
1363
1364         statement_to_firm(statement->body);
1365
1366         assert(continue_label == step_block);
1367         assert(break_label    == false_block);
1368         continue_label = old_continue_label;
1369         break_label    = old_break_label;
1370
1371         if (get_cur_block() != NULL) {
1372                 ir_node *const jmp = new_Jmp();
1373                 add_immBlock_pred(step_block, jmp);
1374         }
1375
1376         mature_immBlock(step_block);
1377         mature_immBlock(header_block);
1378         mature_immBlock(false_block);
1379
1380         set_cur_block(false_block);
1381 }
1382
1383 static void create_declaration_entity(declaration_t *declaration,
1384                                       declaration_type_t declaration_type,
1385                                       ir_type *parent_type)
1386 {
1387         ident     *id     = new_id_from_str(declaration->symbol->string);
1388         ir_type   *irtype = get_ir_type(declaration->type);
1389         ir_entity *entity = new_entity(parent_type, id, irtype);
1390         set_entity_ld_ident(entity, id);
1391
1392         declaration->declaration_type = declaration_type;
1393         declaration->v.entity         = entity;
1394         set_entity_variability(entity, variability_uninitialized);
1395         /* TODO: visibility? */
1396 }
1397
1398 static void create_initializer(declaration_t *declaration)
1399 {
1400         initializer_t *initializer = declaration->init.initializer;
1401         if(initializer == NULL)
1402                 return;
1403
1404         if(initializer->type == INITIALIZER_VALUE) {
1405                 assert(initializer->designator == NULL);
1406                 assert(initializer->next == NULL);
1407                 ir_node *init_node = expression_to_firm(initializer->v.value);
1408
1409                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1410                         set_value(declaration->v.value_number, init_node);
1411                 } else {
1412                         panic("initializer not completely implemented yet");
1413                 }
1414         } else {
1415                 assert(initializer->type == INITIALIZER_LIST);
1416                 panic("list initializer not supported yet");
1417         }
1418 }
1419
1420 static void create_local_variable(declaration_t *declaration)
1421 {
1422         bool needs_entity = declaration->address_taken;
1423
1424         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1425
1426         if(needs_entity) {
1427                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1428                 create_declaration_entity(declaration,
1429                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1430                                           frame_type);
1431         } else {
1432                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1433                 declaration->v.value_number   = next_value_number_function;
1434                 ++next_value_number_function;
1435         }
1436
1437         create_initializer(declaration);
1438 }
1439
1440 static void declaration_statement_to_firm(declaration_statement_t *statement)
1441 {
1442         declaration_t *declaration = statement->declarations_begin;
1443         declaration_t *end         = statement->declarations_end->next;
1444         for( ; declaration != end; declaration = declaration->next) {
1445                 type_t *type = declaration->type;
1446
1447                 switch(declaration->storage_class) {
1448                 case STORAGE_CLASS_TYPEDEF:
1449                         continue;
1450                 case STORAGE_CLASS_STATIC:
1451                         panic("static local vars not implemented yet");
1452                 case STORAGE_CLASS_ENUM_ENTRY:
1453                         panic("enum entry declaration in local block found");
1454                 case STORAGE_CLASS_EXTERN:
1455                         panic("extern declaration in local block found");
1456                 case STORAGE_CLASS_NONE:
1457                 case STORAGE_CLASS_AUTO:
1458                 case STORAGE_CLASS_REGISTER:
1459                         if(type->type == TYPE_FUNCTION) {
1460                                 panic("nested functions not supported yet");
1461                         } else {
1462                                 create_local_variable(declaration);
1463                         }
1464                         continue;
1465                 }
1466                 panic("invalid storage class found");
1467         }
1468 }
1469
1470 static void create_jump_statement(const statement_t *statement,
1471                                   ir_node *target_block)
1472 {
1473         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1474         ir_node  *jump = new_d_Jmp(dbgi);
1475         add_immBlock_pred(target_block, jump);
1476
1477         set_cur_block(NULL);
1478 }
1479
1480 static void switch_statement_to_firm(const switch_statement_t *statement)
1481 {
1482         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1483
1484         ir_node *expression  = expression_to_firm(statement->expression);
1485         ir_node *cond        = new_d_Cond(dbgi, expression);
1486         ir_node *break_block = new_immBlock();
1487
1488         set_cur_block(NULL);
1489
1490         ir_node *old_switch_cond = current_switch_cond;
1491         ir_node *old_break_label = break_label;
1492         current_switch_cond      = cond;
1493         break_label              = break_block;
1494
1495         statement_to_firm(statement->body);
1496
1497         if(get_cur_block() != NULL) {
1498                 ir_node *jmp = new_Jmp();
1499                 add_immBlock_pred(break_block, jmp);
1500         }
1501
1502         assert(current_switch_cond == cond);
1503         assert(break_label         == break_block);
1504         current_switch_cond = old_switch_cond;
1505         break_label         = old_break_label;
1506
1507         mature_immBlock(break_block);
1508         set_cur_block(break_block);
1509 }
1510
1511 static void case_label_to_firm(const case_label_statement_t *statement)
1512 {
1513         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1514
1515         /* let's create a node and hope firm constant folding creates a Const
1516          * node... */
1517         ir_node *proj;
1518         set_cur_block(get_nodes_block(current_switch_cond));
1519         if(statement->expression) {
1520                 ir_node *cnst = expression_to_firm(statement->expression);
1521                 if(!is_Const(cnst)) {
1522                         panic("couldn't fold constant for case label");
1523                 }
1524                 tarval *tv = get_Const_tarval(cnst);
1525                 if(!mode_is_int(get_tarval_mode(tv))) {
1526                         panic("case label not an integer");
1527                 }
1528
1529                 long pn = get_tarval_long(tv);
1530                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1531                         /* oops someone detected our cheating... */
1532                         panic("magic default pn used");
1533                 }
1534                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1535         } else {
1536                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1537                                          MAGIC_DEFAULT_PN_NUMBER);
1538         }
1539
1540         ir_node *block = new_immBlock();
1541         add_immBlock_pred(block, proj);
1542         mature_immBlock(block);
1543 }
1544
1545 static void statement_to_firm(statement_t *statement)
1546 {
1547         switch(statement->type) {
1548         case STATEMENT_COMPOUND:
1549                 compound_statement_to_firm((compound_statement_t*) statement);
1550                 return;
1551         case STATEMENT_RETURN:
1552                 return_statement_to_firm((return_statement_t*) statement);
1553                 return;
1554         case STATEMENT_EXPRESSION:
1555                 expression_statement_to_firm((expression_statement_t*) statement);
1556                 return;
1557         case STATEMENT_IF:
1558                 if_statement_to_firm((if_statement_t*) statement);
1559                 return;
1560         case STATEMENT_WHILE:
1561                 while_statement_to_firm((while_statement_t*) statement);
1562                 return;
1563         case STATEMENT_DO_WHILE:
1564                 do_while_statement_to_firm((do_while_statement_t*) statement);
1565                 return;
1566         case STATEMENT_DECLARATION:
1567                 declaration_statement_to_firm((declaration_statement_t*) statement);
1568                 return;
1569         case STATEMENT_BREAK:
1570                 create_jump_statement(statement, break_label);
1571                 return;
1572         case STATEMENT_CONTINUE:
1573                 create_jump_statement(statement, continue_label);
1574                 return;
1575         case STATEMENT_SWITCH:
1576                 switch_statement_to_firm((switch_statement_t*) statement);
1577                 return;
1578         case STATEMENT_CASE_LABEL:
1579                 case_label_to_firm((case_label_statement_t*) statement);
1580                 return;
1581         case STATEMENT_FOR:
1582                 for_statement_to_firm((for_statement_t*) statement);
1583                 return;
1584         default:
1585                 break;
1586         }
1587         panic("Statement not implemented\n");
1588 }
1589
1590 static int get_function_n_local_vars(declaration_t *declaration)
1591 {
1592         (void) declaration;
1593         /* TODO */
1594         return 30;
1595 }
1596
1597 static void initialize_function_parameters(declaration_t *declaration)
1598 {
1599         ir_graph *irg         = current_ir_graph;
1600         ir_node  *args        = get_irg_args(irg);
1601         ir_node  *start_block = get_irg_start_block(irg);
1602
1603         int            n         = 0;
1604         declaration_t *parameter = declaration->context.declarations;
1605         for( ; parameter != NULL; parameter = parameter->next) {
1606                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
1607
1608                 if(parameter->address_taken) {
1609                         panic("address take from parameter not implemented yet");
1610                 }
1611
1612                 ir_mode *mode = get_ir_mode(parameter->type);
1613                 long     pn   = n;
1614                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
1615                 ++n;
1616
1617                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1618                 parameter->v.value_number   = next_value_number_function;
1619                 ++next_value_number_function;
1620
1621                 set_value(parameter->v.value_number, proj);
1622         }
1623 }
1624
1625 static void create_function(declaration_t *declaration)
1626 {
1627         ir_entity *entity = get_function_entity(declaration);
1628
1629         if(declaration->init.statement == NULL)
1630                 return;
1631
1632         int       n_local_vars = get_function_n_local_vars(declaration);
1633         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
1634         ir_node  *first_block  = get_cur_block();
1635
1636         next_value_number_function = 0;
1637         initialize_function_parameters(declaration);
1638
1639         statement_to_firm(declaration->init.statement);
1640
1641         ir_node *end_block = get_irg_end_block(irg);
1642
1643         /* do we have a return statement yet? */
1644         if(get_cur_block() != NULL) {
1645                 assert(declaration->type->type == TYPE_FUNCTION);
1646                 const function_type_t* const func_type = (const function_type_t*)declaration->type;
1647                 ir_node *ret;
1648                 if (func_type->result_type == type_void) {
1649                         ret = new_Return(get_store(), 0, NULL);
1650                 } else {
1651                         ir_mode *const mode = get_ir_mode(func_type->result_type);
1652                         ir_node *      in[1];
1653                         // §5.1.2.2.3 main implicitly returns 0
1654                         if (strcmp(declaration->symbol->string, "main") == 0) {
1655                                 in[0] = new_Const(mode, get_mode_null(mode));
1656                         } else {
1657                                 in[0] = new_Unknown(mode);
1658                         }
1659                         ret = new_Return(get_store(), 1, in);
1660                 }
1661                 add_immBlock_pred(end_block, ret);
1662         }
1663
1664         mature_immBlock(first_block);
1665         mature_immBlock(end_block);
1666
1667         irg_finalize_cons(irg);
1668
1669         /* finalize the frame type */
1670         ir_type *frame_type = get_irg_frame_type(irg);
1671         int      n          = get_compound_n_members(frame_type);
1672         int      align_all  = 4;
1673         int      offset     = 0;
1674         for(int i = 0; i < n; ++i) {
1675                 ir_entity *entity      = get_compound_member(frame_type, i);
1676                 ir_type   *entity_type = get_entity_type(entity);
1677
1678                 int align = get_type_alignment_bytes(entity_type);
1679                 if(align > align_all)
1680                         align_all = align;
1681                 int misalign = 0;
1682                 if(align > 0) {
1683                         misalign  = offset % align;
1684                         offset   += misalign;
1685                 }
1686
1687                 set_entity_offset(entity, offset);
1688                 offset += get_type_size_bytes(entity_type);
1689         }
1690         set_type_size_bytes(frame_type, offset);
1691         set_type_alignment_bytes(frame_type, align_all);
1692         set_type_state(frame_type, layout_fixed);
1693
1694         irg_vrfy(irg);
1695 }
1696
1697 static void context_to_firm(context_t *context)
1698 {
1699         declaration_t *declaration = context->declarations;
1700         for( ; declaration != NULL; declaration = declaration->next) {
1701                 if(declaration->namespace != NAMESPACE_NORMAL)
1702                         continue;
1703                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
1704                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
1705                         continue;
1706
1707                 type_t *type = declaration->type;
1708                 if(type->type == TYPE_FUNCTION) {
1709                         create_function(declaration);
1710                 } else {
1711                         /* TODO... */
1712                 }
1713         }
1714 }
1715
1716 void translation_unit_to_firm(translation_unit_t *unit)
1717 {
1718         /* remove me later TODO FIXME */
1719         (void) get_type_size;
1720
1721         /* just to be sure */
1722         continue_label      = NULL;
1723         break_label         = NULL;
1724         current_switch_cond = NULL;
1725
1726         context_to_firm(& unit->context);
1727 }