nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25
  26 #include <libfirm/firm.h>
  27 #include <libfirm/adt/obst.h>
  28
  29 #include "ast2firm.h"
  30
  31 #include "adt/error.h"
  32 #include "adt/array.h"
  33 #include "symbol_t.h"
  34 #include "token_t.h"
  35 #include "type_t.h"
  36 #include "ast_t.h"
  37 #include "parser.h"
  38 #include "diagnostic.h"
  39 #include "lang_features.h"
  40 #include "types.h"
  41 #include "warning.h"
  42 #include "driver/firm_opt.h"
  43 #include "driver/firm_cmdline.h"
  44
  45 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  46
  47 /* some idents needed for name mangling */
  48 static ident *id_underscore;
  49 static ident *id_imp;
  50
  51 static ir_type *ir_type_const_char;
  52 static ir_type *ir_type_wchar_t;
  53 static ir_type *ir_type_void;
  54 static ir_type *ir_type_int;
  55
  56 static type_t *type_const_char;
  57
  58 static int       next_value_number_function;
  59 static ir_node  *continue_label;
  60 static ir_node  *break_label;
  61 static ir_node  *current_switch_cond;
  62 static bool      saw_default_label;
  63 static ir_node **imature_blocks;
  64
  65 static const declaration_t *current_function_decl;
  66 static ir_node             *current_function_name;
  67 static ir_node             *current_funcsig;
  68
  69 static struct obstack asm_obst;
  70
  71 typedef enum declaration_kind_t {
  72         DECLARATION_KIND_UNKNOWN,
  73         DECLARATION_KIND_FUNCTION,
  74         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  75         DECLARATION_KIND_GLOBAL_VARIABLE,
  76         DECLARATION_KIND_LOCAL_VARIABLE,
  77         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  78         DECLARATION_KIND_COMPOUND_MEMBER,
  79         DECLARATION_KIND_LABEL_BLOCK,
  80         DECLARATION_KIND_ENUM_ENTRY,
  81         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  82         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  83         DECLARATION_KIND_TYPE
  84 } declaration_kind_t;
  85
  86 static ir_type *get_ir_type(type_t *type);
  87 static ir_type *get_ir_type_incomplete(type_t *type);
  88 static int count_decls_in_stmts(const statement_t *stmt);
  89
  90 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  91 {
  92         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  93
  94         warningf(&declaration->source_position,
  95                  "variable '%#T' might be used uninitialized",
  96                  declaration->type, declaration->symbol);
  97         return new_r_Unknown(irg, mode);
  98 }
  99
 100 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 101 {
 102         const source_position_t *pos = (const source_position_t*) dbg;
 103         if(pos == NULL)
 104                 return 0;
 105         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 106                                    pos->linenr);
 107 }
 108
 109 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 110 {
 111         const source_position_t *pos = (const source_position_t*) dbg;
 112         if(pos == NULL)
 113                 return NULL;
 114         if(line != NULL)
 115                 *line = pos->linenr;
 116         return pos->input_name;
 117 }
 118
 119 static dbg_info *get_dbg_info(const source_position_t *pos)
 120 {
 121         return (dbg_info*) pos;
 122 }
 123
 124 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 125
 126 static ir_mode *mode_int, *mode_uint;
 127
 128 static ir_node *_expression_to_firm(const expression_t *expression);
 129 static ir_node *expression_to_firm(const expression_t *expression);
 130 static inline ir_mode *get_ir_mode(type_t *type);
 131 static void create_local_declaration(declaration_t *declaration);
 132
 133 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 134 {
 135         unsigned flags = get_atomic_type_flags(kind);
 136         unsigned size  = get_atomic_type_size(kind);
 137         if( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 138                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 139                 char            name[64];
 140                 ir_mode_sort    sort;
 141                 unsigned        bit_size     = size * 8;
 142                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 143                 ir_mode_arithmetic arithmetic;
 144                 unsigned        modulo_shift;
 145
 146                 if(flags & ATOMIC_TYPE_FLAG_INTEGER) {
 147                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 148                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 149                         sort         = irms_int_number;
 150                         arithmetic   = irma_twos_complement;
 151                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 152                 } else {
 153                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 154                         snprintf(name, sizeof(name), "f%d", bit_size);
 155                         sort         = irms_float_number;
 156                         arithmetic   = irma_ieee754;
 157                         modulo_shift = 0;
 158                 }
 159                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 160                                    modulo_shift);
 161         }
 162
 163         return NULL;
 164 }
 165
 166 /**
 167  * Initialises the atomic modes depending on the machine size.
 168  */
 169 static void init_atomic_modes(void)
 170 {
 171         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 172                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 173         }
 174         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 175         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 176
 177         /* there's no real void type in firm */
 178         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 179
 180         /* initialize pointer modes */
 181         char            name[64];
 182         ir_mode_sort    sort         = irms_reference;
 183         unsigned        bit_size     = machine_size;
 184         bool            is_signed    = 0;
 185         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 186         unsigned        modulo_shift
 187                 = bit_size < machine_size ? machine_size : bit_size;
 188
 189         snprintf(name, sizeof(name), "p%d", machine_size);
 190         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 191                                         modulo_shift);
 192
 193         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 194         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 195
 196         /* Hmm, pointers should be machine size */
 197         set_modeP_data(ptr_mode);
 198         set_modeP_code(ptr_mode);
 199 }
 200
 201 static unsigned get_compound_type_size(compound_type_t *type)
 202 {
 203         ir_type *irtype = get_ir_type((type_t*) type);
 204         return get_type_size_bytes(irtype);
 205 }
 206
 207 static unsigned get_array_type_size(array_type_t *type)
 208 {
 209         assert(!type->is_vla);
 210         ir_type *irtype = get_ir_type((type_t*) type);
 211         return get_type_size_bytes(irtype);
 212 }
 213
 214
 215 static unsigned get_type_size_const(type_t *type)
 216 {
 217         type = skip_typeref(type);
 218
 219         switch(type->kind) {
 220         case TYPE_ERROR:
 221                 panic("error type occurred");
 222         case TYPE_ATOMIC:
 223                 return get_atomic_type_size(type->atomic.akind);
 224         case TYPE_COMPLEX:
 225                 return 2 * get_atomic_type_size(type->complex.akind);
 226         case TYPE_IMAGINARY:
 227                 return get_atomic_type_size(type->imaginary.akind);
 228         case TYPE_ENUM:
 229                 return get_mode_size_bytes(mode_int);
 230         case TYPE_COMPOUND_UNION:
 231         case TYPE_COMPOUND_STRUCT:
 232                 return get_compound_type_size(&type->compound);
 233         case TYPE_FUNCTION:
 234                 /* just a pointer to the function */
 235                 return get_mode_size_bytes(mode_P_code);
 236         case TYPE_POINTER:
 237                 return get_mode_size_bytes(mode_P_data);
 238         case TYPE_ARRAY:
 239                 return get_array_type_size(&type->array);
 240         case TYPE_BUILTIN:
 241                 return get_type_size_const(type->builtin.real_type);
 242         case TYPE_BITFIELD:
 243                 panic("type size of bitfield request");
 244         case TYPE_TYPEDEF:
 245         case TYPE_TYPEOF:
 246         case TYPE_INVALID:
 247                 break;
 248         }
 249         panic("Trying to determine size of invalid type");
 250 }
 251
 252 static ir_node *get_type_size(type_t *type)
 253 {
 254         type = skip_typeref(type);
 255
 256         if(is_type_array(type) && type->array.is_vla) {
 257                 ir_node *size_node = type->array.size_node;
 258                 if(size_node == NULL) {
 259                         size_node = expression_to_firm(type->array.size_expression);
 260                         assert(!is_Const(size_node));
 261                         type->array.size_node = size_node;
 262                 }
 263
 264                 ir_node *elem_size = get_type_size(type->array.element_type);
 265                 ir_mode *mode      = get_irn_mode(size_node);
 266                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 267                 return real_size;
 268         }
 269
 270         ir_mode *mode = get_ir_mode(type_size_t);
 271         symconst_symbol sym;
 272         sym.type_p = get_ir_type(type);
 273         return new_SymConst(mode, sym, symconst_type_size);
 274 }
 275
 276 static unsigned count_parameters(const function_type_t *function_type)
 277 {
 278         unsigned count = 0;
 279
 280         function_parameter_t *parameter = function_type->parameters;
 281         for ( ; parameter != NULL; parameter = parameter->next) {
 282                 ++count;
 283         }
 284
 285         return count;
 286 }
 287
 288 /**
 289  * Creates a Firm type for an atomic type
 290  */
 291 static ir_type *create_atomic_type(const atomic_type_t *type)
 292 {
 293         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 294         atomic_type_kind_t  kind      = type->akind;
 295         ir_mode            *mode      = _atomic_modes[kind];
 296         ident              *id        = get_mode_ident(mode);
 297         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 298
 299         set_type_alignment_bytes(irtype, type->base.alignment);
 300
 301         return irtype;
 302 }
 303
 304 /**
 305  * Creates a Firm type for a complex type
 306  */
 307 static ir_type *create_complex_type(const complex_type_t *type)
 308 {
 309         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 310         atomic_type_kind_t  kind      = type->akind;
 311         ir_mode            *mode      = _atomic_modes[kind];
 312         ident              *id        = get_mode_ident(mode);
 313
 314         (void) id;
 315         (void) dbgi;
 316
 317         /* FIXME: finish the array */
 318         return NULL;
 319 }
 320
 321 /**
 322  * Creates a Firm type for an imaginary type
 323  */
 324 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 325 {
 326         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 327         atomic_type_kind_t  kind      = type->akind;
 328         ir_mode            *mode      = _atomic_modes[kind];
 329         ident              *id        = get_mode_ident(mode);
 330         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 331
 332         set_type_alignment_bytes(irtype, type->base.alignment);
 333
 334         return irtype;
 335 }
 336
 337 static ir_type *create_method_type(const function_type_t *function_type)
 338 {
 339         type_t  *return_type  = function_type->return_type;
 340
 341         ident   *id           = id_unique("functiontype.%u");
 342         int      n_parameters = count_parameters(function_type);
 343         int      n_results    = return_type == type_void ? 0 : 1;
 344         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 345         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 346
 347         if(return_type != type_void) {
 348                 ir_type *restype = get_ir_type(return_type);
 349                 set_method_res_type(irtype, 0, restype);
 350         }
 351
 352         function_parameter_t *parameter = function_type->parameters;
 353         int                   n         = 0;
 354         for( ; parameter != NULL; parameter = parameter->next) {
 355                 ir_type *p_irtype = get_ir_type(parameter->type);
 356                 set_method_param_type(irtype, n, p_irtype);
 357                 ++n;
 358         }
 359
 360         if(function_type->variadic || function_type->unspecified_parameters) {
 361                 set_method_variadicity(irtype, variadicity_variadic);
 362         }
 363
 364         return irtype;
 365 }
 366
 367 static ir_type *create_pointer_type(pointer_type_t *type)
 368 {
 369         type_t   *points_to    = type->points_to;
 370         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 371         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 372         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 373                                                     ir_points_to, mode_P_data, dbgi);
 374
 375         return ir_type;
 376 }
 377
 378 static ir_type *create_array_type(array_type_t *type)
 379 {
 380         type_t  *element_type    = type->element_type;
 381         ir_type *ir_element_type = get_ir_type(element_type);
 382
 383         ident    *id      = id_unique("array.%u");
 384         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 385         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 386
 387         const int align = get_type_alignment_bytes(ir_element_type);
 388         set_type_alignment_bytes(ir_type, align);
 389
 390         if(type->size_constant) {
 391                 int n_elements = type->size;
 392
 393                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 394
 395                 size_t elemsize = get_type_size_bytes(ir_element_type);
 396                 if(elemsize % align > 0) {
 397                         elemsize += align - (elemsize % align);
 398                 }
 399                 set_type_size_bytes(ir_type, n_elements * elemsize);
 400         } else {
 401                 set_array_lower_bound_int(ir_type, 0, 0);
 402         }
 403         set_type_state(ir_type, layout_fixed);
 404
 405         return ir_type;
 406 }
 407
 408 /**
 409  * Return the signed integer type of size bits.
 410  *
 411  * @param size   the size
 412  */
 413 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 414                                                  unsigned size)
 415 {
 416         static ir_mode *s_modes[64 + 1] = {NULL, };
 417         ir_type *res;
 418         ir_mode *mode;
 419
 420         if (size <= 0 || size > 64)
 421                 return NULL;
 422
 423         mode = s_modes[size];
 424         if (mode == NULL) {
 425                 char name[32];
 426
 427                 snprintf(name, sizeof(name), "bf_I%u", size);
 428                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 429                                    size <= 32 ? 32 : size );
 430                 s_modes[size] = mode;
 431         }
 432
 433         char name[32];
 434         snprintf(name, sizeof(name), "I%u", size);
 435         ident *id = new_id_from_str(name);
 436         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 437         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 438         set_primitive_base_type(res, base_tp);
 439
 440         return res;
 441 }
 442
 443 /**
 444  * Return the unsigned integer type of size bits.
 445  *
 446  * @param size   the size
 447  */
 448 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 449                                                    unsigned size)
 450 {
 451         static ir_mode *u_modes[64 + 1] = {NULL, };
 452         ir_type *res;
 453         ir_mode *mode;
 454
 455         if (size <= 0 || size > 64)
 456                 return NULL;
 457
 458         mode = u_modes[size];
 459         if (mode == NULL) {
 460                 char name[32];
 461
 462                 snprintf(name, sizeof(name), "bf_U%u", size);
 463                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 464                                    size <= 32 ? 32 : size );
 465                 u_modes[size] = mode;
 466         }
 467
 468         char name[32];
 469
 470         snprintf(name, sizeof(name), "U%u", size);
 471         ident *id = new_id_from_str(name);
 472         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 473         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 474         set_primitive_base_type(res, base_tp);
 475
 476         return res;
 477 }
 478
 479 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 480 {
 481         type_t *base = skip_typeref(type->base_type);
 482         assert(base->kind == TYPE_ATOMIC);
 483         ir_type *irbase = get_ir_type(base);
 484
 485         unsigned size = fold_constant(type->size);
 486
 487         assert(!is_type_float(base));
 488         if(is_type_signed(base)) {
 489                 return get_signed_int_type_for_bit_size(irbase, size);
 490         } else {
 491                 return get_unsigned_int_type_for_bit_size(irbase, size);
 492         }
 493 }
 494
 495 #define INVALID_TYPE ((ir_type_ptr)-1)
 496
 497 enum {
 498         COMPOUND_IS_STRUCT = false,
 499         COMPOUND_IS_UNION  = true
 500 };
 501
 502 /**
 503  * Construct firm type from ast struct type.
 504  *
 505  * As anonymous inner structs get flattened to a single firm type, we might get
 506  * irtype, outer_offset and out_align passed (they represent the position of
 507  * the anonymous inner struct inside the resulting firm struct)
 508  */
 509 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 510                                      size_t *outer_offset, size_t *outer_align,
 511                                      bool incomplete, bool is_union)
 512 {
 513         declaration_t      *declaration = type->declaration;
 514         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 515
 516         if(kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 517                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 518                                 && incomplete))
 519                 return declaration->v.irtype;
 520
 521         size_t align_all  = 1;
 522         size_t offset     = 0;
 523         size_t bit_offset = 0;
 524         size_t size       = 0;
 525
 526         if(irtype == NULL) {
 527                 symbol_t *symbol = declaration->symbol;
 528                 ident    *id;
 529                 if(symbol != NULL) {
 530                         id = new_id_from_str(symbol->string);
 531                 } else {
 532                         if (is_union) {
 533                                 id = id_unique("__anonymous_union.%u");
 534                         } else {
 535                                 id = id_unique("__anonymous_struct.%u");
 536                         }
 537                 }
 538                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 539
 540                 if (is_union) {
 541                         irtype = new_d_type_union(id, dbgi);
 542                 } else {
 543                         irtype = new_d_type_struct(id, dbgi);
 544                 }
 545
 546                 declaration->declaration_kind
 547                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 548                 declaration->v.irtype         = irtype;
 549                 //type->base.firm_type          = irtype;
 550         } else {
 551                 offset    = *outer_offset;
 552                 align_all = *outer_align;
 553         }
 554
 555         if(incomplete)
 556                 return irtype;
 557
 558         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 559
 560         declaration_t *entry = declaration->scope.declarations;
 561         for( ; entry != NULL; entry = entry->next) {
 562                 if(entry->namespc != NAMESPACE_NORMAL)
 563                         continue;
 564
 565                 size_t prev_offset = offset;
 566
 567                 symbol_t *symbol     = entry->symbol;
 568                 type_t   *entry_type = skip_typeref(entry->type);
 569                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 570
 571                 ident    *ident;
 572                 if(symbol != NULL) {
 573                         ident = new_id_from_str(symbol->string);
 574                 } else {
 575                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 576                                 create_compound_type(&entry_type->compound, irtype, &offset,
 577                                                      &align_all, false, COMPOUND_IS_STRUCT);
 578                                 goto finished_member;
 579                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 580                                 create_compound_type(&entry_type->compound, irtype, &offset,
 581                                                      &align_all, false, COMPOUND_IS_UNION);
 582                                 goto finished_member;
 583                         } else {
 584                                 assert(entry_type->kind == TYPE_BITFIELD);
 585                         }
 586                         ident = id_unique("anon.%u");
 587                 }
 588
 589                 ir_type *base_irtype;
 590                 if(entry_type->kind == TYPE_BITFIELD) {
 591                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 592                 } else {
 593                         base_irtype = get_ir_type(entry_type);
 594                 }
 595
 596                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 597                 size_t misalign        = offset % entry_alignment;
 598
 599                 ir_type   *entry_irtype = get_ir_type(entry_type);
 600                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 601
 602                 size_t base;
 603                 size_t bits_remainder;
 604                 if(entry_type->kind == TYPE_BITFIELD) {
 605                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 606                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 607
 608                         if(size_bits > rest_size_bits) {
 609                                 /* start a new bucket */
 610                                 offset     += entry_alignment - misalign;
 611                                 bit_offset  = 0;
 612
 613                                 base           = offset;
 614                                 bits_remainder = 0;
 615                         } else {
 616                                 /* put into current bucket */
 617                                 base           = offset - misalign;
 618                                 bits_remainder = misalign * 8 + bit_offset;
 619                         }
 620
 621                         offset     += size_bits / 8;
 622                         bit_offset  = bit_offset + (size_bits % 8);
 623                 } else {
 624                         size_t entry_size = get_type_size_bytes(base_irtype);
 625                         if(misalign > 0 || bit_offset > 0)
 626                                 offset += entry_alignment - misalign;
 627
 628                         base           = offset;
 629                         bits_remainder = 0;
 630                         offset        += entry_size;
 631                         bit_offset     = 0;
 632                 }
 633
 634                 if(entry_alignment > align_all) {
 635                         if(entry_alignment % align_all != 0) {
 636                                 panic("uneven alignments not supported yet");
 637                         }
 638                         align_all = entry_alignment;
 639                 }
 640
 641                 set_entity_offset(entity, base);
 642                 set_entity_offset_bits_remainder(entity,
 643                                                  (unsigned char) bits_remainder);
 644                 //add_struct_member(irtype, entity);
 645                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 646                 assert(entry->v.entity == NULL);
 647                 entry->v.entity         = entity;
 648
 649 finished_member:
 650                 if (is_union) {
 651                         size_t entry_size = offset - prev_offset;
 652                         if (entry_size > size) {
 653                                 size = entry_size;
 654                         }
 655                         offset     = 0;
 656                         bit_offset = 0;
 657                 }
 658         }
 659
 660         if (!is_union) {
 661                 size = offset;
 662         }
 663
 664         size_t misalign = offset % align_all;
 665         if(misalign > 0 || bit_offset > 0) {
 666                 size += align_all - misalign;
 667         }
 668
 669         if(outer_offset != NULL) {
 670                 if (!is_union) {
 671                         *outer_offset = offset;
 672                 } else {
 673                         *outer_offset += size;
 674                 }
 675
 676                 if (align_all > *outer_align) {
 677                         if(align_all % *outer_align != 0) {
 678                                 panic("uneven alignments not supported yet");
 679                         }
 680                         *outer_align = align_all;
 681                 }
 682         } else {
 683                 set_type_alignment_bytes(irtype, align_all);
 684                 set_type_size_bytes(irtype, size);
 685                 set_type_state(irtype, layout_fixed);
 686         }
 687
 688         return irtype;
 689 }
 690
 691 static ir_type *create_enum_type(enum_type_t *const type)
 692 {
 693         type->base.firm_type = ir_type_int;
 694
 695         ir_mode *const mode    = mode_int;
 696         tarval  *const one     = get_mode_one(mode);
 697         tarval  *      tv_next = get_tarval_null(mode);
 698
 699         declaration_t *declaration = type->declaration->next;
 700         for (; declaration != NULL; declaration = declaration->next) {
 701                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 702                         break;
 703
 704                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 705
 706                 expression_t *const init = declaration->init.enum_value;
 707                 if (init != NULL) {
 708                         ir_node *const cnst = expression_to_firm(init);
 709                         if (!is_Const(cnst)) {
 710                                 panic("couldn't fold constant");
 711                         }
 712                         tv_next = get_Const_tarval(cnst);
 713                 }
 714                 declaration->v.enum_val = tv_next;
 715                 tv_next = tarval_add(tv_next, one);
 716         }
 717
 718         return ir_type_int;
 719 }
 720
 721 static ir_type *get_ir_type_incomplete(type_t *type)
 722 {
 723         assert(type != NULL);
 724         type = skip_typeref(type);
 725
 726         if (type->base.firm_type != NULL) {
 727                 assert(type->base.firm_type != INVALID_TYPE);
 728                 return type->base.firm_type;
 729         }
 730
 731         switch (type->kind) {
 732         case TYPE_COMPOUND_STRUCT:
 733                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 734                                             true, COMPOUND_IS_STRUCT);
 735                 break;
 736         case TYPE_COMPOUND_UNION:
 737                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 738                                             true, COMPOUND_IS_UNION);
 739         default:
 740                 return get_ir_type(type);
 741         }
 742 }
 743
 744 static ir_type *get_ir_type(type_t *type)
 745 {
 746         assert(type != NULL);
 747
 748         type = skip_typeref(type);
 749
 750         if (type->base.firm_type != NULL) {
 751                 assert(type->base.firm_type != INVALID_TYPE);
 752                 return type->base.firm_type;
 753         }
 754
 755         ir_type *firm_type = NULL;
 756         switch (type->kind) {
 757         case TYPE_ERROR:
 758                 panic("error type occurred");
 759         case TYPE_ATOMIC:
 760                 firm_type = create_atomic_type(&type->atomic);
 761                 break;
 762         case TYPE_COMPLEX:
 763                 firm_type = create_complex_type(&type->complex);
 764                 break;
 765         case TYPE_IMAGINARY:
 766                 firm_type = create_imaginary_type(&type->imaginary);
 767                 break;
 768         case TYPE_FUNCTION:
 769                 firm_type = create_method_type(&type->function);
 770                 break;
 771         case TYPE_POINTER:
 772                 firm_type = create_pointer_type(&type->pointer);
 773                 break;
 774         case TYPE_ARRAY:
 775                 firm_type = create_array_type(&type->array);
 776                 break;
 777         case TYPE_COMPOUND_STRUCT:
 778                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 779                                                  false, COMPOUND_IS_STRUCT);
 780                 break;
 781         case TYPE_COMPOUND_UNION:
 782                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 783                                                  false, COMPOUND_IS_UNION);
 784                 break;
 785         case TYPE_ENUM:
 786                 firm_type = create_enum_type(&type->enumt);
 787                 break;
 788         case TYPE_BUILTIN:
 789                 firm_type = get_ir_type(type->builtin.real_type);
 790                 break;
 791         case TYPE_BITFIELD:
 792                 firm_type = create_bitfield_type(&type->bitfield);
 793                 break;
 794
 795         case TYPE_TYPEOF:
 796         case TYPE_TYPEDEF:
 797         case TYPE_INVALID:
 798                 break;
 799         }
 800         if(firm_type == NULL)
 801                 panic("unknown type found");
 802
 803         type->base.firm_type = firm_type;
 804         return firm_type;
 805 }
 806
 807 static inline ir_mode *get_ir_mode(type_t *type)
 808 {
 809         ir_type *irtype = get_ir_type(type);
 810
 811         /* firm doesn't report a mode for arrays somehow... */
 812         if(is_Array_type(irtype)) {
 813                 return mode_P_data;
 814         }
 815
 816         ir_mode *mode = get_type_mode(irtype);
 817         assert(mode != NULL);
 818         return mode;
 819 }
 820
 821 /** Names of the runtime functions. */
 822 static const struct {
 823         int        id;           /**< the rts id */
 824         int        n_res;        /**< number of return values */
 825         const char *name;        /**< the name of the rts function */
 826         int        n_params;     /**< number of parameters */
 827         unsigned   flags;        /**< language flags */
 828 } rts_data[] = {
 829         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 830         { rts_abort,      0, "abort",        0, _C89 },
 831         { rts_alloca,     1, "alloca",       1, _ALL },
 832         { rts_abs,        1, "abs",          1, _C89 },
 833         { rts_labs,       1, "labs",         1, _C89 },
 834         { rts_llabs,      1, "llabs",        1, _C99 },
 835         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 836
 837         { rts_fabs,       1, "fabs",         1, _C89 },
 838         { rts_sqrt,       1, "sqrt",         1, _C89 },
 839         { rts_cbrt,       1, "cbrt",         1, _C99 },
 840         { rts_exp,        1, "exp",          1, _C89 },
 841         { rts_exp2,       1, "exp2",         1, _C89 },
 842         { rts_exp10,      1, "exp10",        1, _GNUC },
 843         { rts_log,        1, "log",          1, _C89 },
 844         { rts_log2,       1, "log2",         1, _C89 },
 845         { rts_log10,      1, "log10",        1, _C89 },
 846         { rts_pow,        1, "pow",          2, _C89 },
 847         { rts_sin,        1, "sin",          1, _C89 },
 848         { rts_cos,        1, "cos",          1, _C89 },
 849         { rts_tan,        1, "tan",          1, _C89 },
 850         { rts_asin,       1, "asin",         1, _C89 },
 851         { rts_acos,       1, "acos",         1, _C89 },
 852         { rts_atan,       1, "atan",         1, _C89 },
 853         { rts_sinh,       1, "sinh",         1, _C89 },
 854         { rts_cosh,       1, "cosh",         1, _C89 },
 855         { rts_tanh,       1, "tanh",         1, _C89 },
 856
 857         { rts_fabsf,      1, "fabsf",        1, _C99 },
 858         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 859         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 860         { rts_expf,       1, "expf",         1, _C99 },
 861         { rts_exp2f,      1, "exp2f",        1, _C99 },
 862         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 863         { rts_logf,       1, "logf",         1, _C99 },
 864         { rts_log2f,      1, "log2f",        1, _C99 },
 865         { rts_log10f,     1, "log10f",       1, _C99 },
 866         { rts_powf,       1, "powf",         2, _C99 },
 867         { rts_sinf,       1, "sinf",         1, _C99 },
 868         { rts_cosf,       1, "cosf",         1, _C99 },
 869         { rts_tanf,       1, "tanf",         1, _C99 },
 870         { rts_asinf,      1, "asinf",        1, _C99 },
 871         { rts_acosf,      1, "acosf",        1, _C99 },
 872         { rts_atanf,      1, "atanf",        1, _C99 },
 873         { rts_sinhf,      1, "sinhf",        1, _C99 },
 874         { rts_coshf,      1, "coshf",        1, _C99 },
 875         { rts_tanhf,      1, "tanhf",        1, _C99 },
 876
 877         { rts_fabsl,      1, "fabsl",        1, _C99 },
 878         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 879         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 880         { rts_expl,       1, "expl",         1, _C99 },
 881         { rts_exp2l,      1, "exp2l",        1, _C99 },
 882         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 883         { rts_logl,       1, "logl",         1, _C99 },
 884         { rts_log2l,      1, "log2l",        1, _C99 },
 885         { rts_log10l,     1, "log10l",       1, _C99 },
 886         { rts_powl,       1, "powl",         2, _C99 },
 887         { rts_sinl,       1, "sinl",         1, _C99 },
 888         { rts_cosl,       1, "cosl",         1, _C99 },
 889         { rts_tanl,       1, "tanl",         1, _C99 },
 890         { rts_asinl,      1, "asinl",        1, _C99 },
 891         { rts_acosl,      1, "acosl",        1, _C99 },
 892         { rts_atanl,      1, "atanl",        1, _C99 },
 893         { rts_sinhl,      1, "sinhl",        1, _C99 },
 894         { rts_coshl,      1, "coshl",        1, _C99 },
 895         { rts_tanhl,      1, "tanhl",        1, _C99 },
 896
 897         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 898         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 899         { rts_strcmp,     1, "strcmp",       2, _C89 },
 900         { rts_strncmp,    1, "strncmp",      3, _C89 }
 901 };
 902
 903 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 904
 905 /**
 906  * Mangles an entity linker (ld) name for win32 usage.
 907  *
 908  * @param ent          the entity to be mangled
 909  * @param declaration  the declaration
 910  */
 911 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 912 {
 913         ident *id;
 914
 915         if (is_Method_type(get_entity_type(ent)))
 916                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 917         else {
 918                 /* always add an underscore in win32 */
 919                 id = mangle(id_underscore, get_entity_ident(ent));
 920         }
 921
 922         decl_modifiers_t decl_modifiers = declaration->decl_modifiers;
 923         if (decl_modifiers & DM_DLLIMPORT) {
 924                 /* add prefix for imported symbols */
 925                 id = mangle(id_imp, id);
 926         }
 927         return id;
 928 }
 929
 930 /**
 931  * Mangles an entity linker (ld) name for Linux ELF usage.
 932  *
 933  * @param ent          the entity to be mangled
 934  * @param declaration  the declaration
 935  */
 936 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 937                                         declaration_t *declaration)
 938 {
 939         (void) declaration;
 940         return get_entity_ident(entity);
 941 }
 942
 943 /**
 944  * Mangles an entity linker (ld) name for Mach-O usage.
 945  *
 946  * @param ent          the entity to be mangled
 947  * @param declaration  the declaration
 948  */
 949 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
 950 {
 951         (void) declaration;
 952         ident *id = mangle(id_underscore, get_entity_ident(ent));
 953         return id;
 954 }
 955
 956 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
 957                                        declaration_t *declaration);
 958 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
 959
 960 /**
 961  * Creates an entity representing a function.
 962  *
 963  * @param declaration  the function declaration
 964  */
 965 static ir_entity *get_function_entity(declaration_t *declaration)
 966 {
 967         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 968                 return declaration->v.entity;
 969         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 970
 971         symbol_t *symbol = declaration->symbol;
 972         ident    *id     = new_id_from_str(symbol->string);
 973
 974         ir_type  *global_type    = get_glob_type();
 975         ir_type  *ir_type_method = get_ir_type(declaration->type);
 976         assert(is_Method_type(ir_type_method));
 977
 978         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 979         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 980         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
 981         if(declaration->storage_class == STORAGE_CLASS_STATIC &&
 982                 declaration->init.statement == NULL) {
 983                 /* this entity was declared, but never defined */
 984                 set_entity_peculiarity(entity, peculiarity_description);
 985         }
 986         if(declaration->storage_class == STORAGE_CLASS_STATIC
 987                         || declaration->is_inline) {
 988                 set_entity_visibility(entity, visibility_local);
 989         } else if(declaration->init.statement != NULL) {
 990                 set_entity_visibility(entity, visibility_external_visible);
 991         } else {
 992                 set_entity_visibility(entity, visibility_external_allocated);
 993         }
 994         set_entity_allocation(entity, allocation_static);
 995
 996         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
 997         declaration->v.entity         = entity;
 998
 999         /* We should check for file scope here, but as long as we compile C only
1000            this is not needed. */
1001         if (! firm_opt.freestanding) {
1002                 /* check for a known runtime function */
1003                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1004                         if (id != rts_idents[i])
1005                                 continue;
1006
1007                         /* ignore those rts functions not necessary needed for current mode */
1008                         if ((c_mode & rts_data[i].flags) == 0)
1009                                 continue;
1010                         assert(rts_entities[rts_data[i].id] == NULL);
1011                         rts_entities[rts_data[i].id] = entity;
1012                 }
1013         }
1014
1015         return entity;
1016 }
1017
1018 /**
1019  * Creates a Const node representing a constant.
1020  */
1021 static ir_node *const_to_firm(const const_expression_t *cnst)
1022 {
1023         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1024         ir_mode  *mode = get_ir_mode(cnst->base.type);
1025
1026         char    buf[128];
1027         tarval *tv;
1028         size_t  len;
1029         if(mode_is_float(mode)) {
1030                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1031         } else {
1032                 if(mode_is_signed(mode)) {
1033                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1034                 } else {
1035                         len = snprintf(buf, sizeof(buf), "%llu",
1036                                        (unsigned long long) cnst->v.int_value);
1037                 }
1038                 tv = new_tarval_from_str(buf, len, mode);
1039         }
1040
1041         return new_d_Const(dbgi, mode, tv);
1042 }
1043
1044 /**
1045  * Creates a Const node representing a character constant.
1046  */
1047 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1048 {
1049         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1050         ir_mode  *mode = get_ir_mode(cnst->base.type);
1051
1052         long long int v = 0;
1053         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1054                 if (char_is_signed) {
1055                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1056                 } else {
1057                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1058                 }
1059         }
1060         char    buf[128];
1061         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1062         tarval *tv = new_tarval_from_str(buf, len, mode);
1063
1064         return new_d_Const(dbgi, mode, tv);
1065 }
1066
1067 /**
1068  * Creates a Const node representing a wide character constant.
1069  */
1070 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1071 {
1072         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1073         ir_mode  *mode = get_ir_mode(cnst->base.type);
1074
1075         long long int v = cnst->v.wide_character.begin[0];
1076
1077         char    buf[128];
1078         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1079         tarval *tv = new_tarval_from_str(buf, len, mode);
1080
1081         return new_d_Const(dbgi, mode, tv);
1082 }
1083
1084 /**
1085  * Creates a SymConst for a given entity.
1086  *
1087  * @param dbgi    debug info
1088  * @param mode    the (reference) mode for the SymConst
1089  * @param entity  the entity
1090  */
1091 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1092                               ir_entity *entity)
1093 {
1094         assert(entity != NULL);
1095         union symconst_symbol sym;
1096         sym.entity_p = entity;
1097         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1098 }
1099
1100 /**
1101  * Creates a SymConst node representing a string constant.
1102  *
1103  * @param src_pos    the source position of the string constant
1104  * @param id_prefix  a prefix for the name of the generated string constant
1105  * @param value      the value of the string constant
1106  */
1107 static ir_node *string_to_firm(const source_position_t *const src_pos,
1108                                const char *const id_prefix,
1109                                const string_t *const value)
1110 {
1111         ir_type  *const global_type = get_glob_type();
1112         dbg_info *const dbgi        = get_dbg_info(src_pos);
1113         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1114                                                        ir_type_const_char, dbgi);
1115
1116         ident     *const id     = id_unique(id_prefix);
1117         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1118         set_entity_ld_ident(entity, id);
1119         set_entity_variability(entity, variability_constant);
1120         set_entity_allocation(entity, allocation_static);
1121
1122         ir_type *const elem_type = ir_type_const_char;
1123         ir_mode *const mode      = get_type_mode(elem_type);
1124
1125         const char* const string = value->begin;
1126         const size_t      slen   = value->size;
1127
1128         set_array_lower_bound_int(type, 0, 0);
1129         set_array_upper_bound_int(type, 0, slen);
1130         set_type_size_bytes(type, slen);
1131         set_type_state(type, layout_fixed);
1132
1133         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1134         for(size_t i = 0; i < slen; ++i) {
1135                 tvs[i] = new_tarval_from_long(string[i], mode);
1136         }
1137
1138         set_array_entity_values(entity, tvs, slen);
1139         free(tvs);
1140
1141         return create_symconst(dbgi, mode_P_data, entity);
1142 }
1143
1144 /**
1145  * Creates a SymConst node representing a string literal.
1146  *
1147  * @param literal   the string literal
1148  */
1149 static ir_node *string_literal_to_firm(
1150                 const string_literal_expression_t* literal)
1151 {
1152         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1153                               &literal->value);
1154 }
1155
1156 /**
1157  * Creates a SymConst node representing a wide string literal.
1158  *
1159  * @param literal   the wide string literal
1160  */
1161 static ir_node *wide_string_literal_to_firm(
1162         const wide_string_literal_expression_t* const literal)
1163 {
1164         ir_type *const global_type = get_glob_type();
1165         ir_type *const elem_type   = ir_type_wchar_t;
1166         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1167         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1168                                                     elem_type, dbgi);
1169
1170         ident     *const id     = id_unique("Lstr.%u");
1171         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1172         set_entity_ld_ident(entity, id);
1173         set_entity_variability(entity, variability_constant);
1174         set_entity_allocation(entity, allocation_static);
1175
1176         ir_mode *const mode      = get_type_mode(elem_type);
1177
1178         const wchar_rep_t *const string = literal->value.begin;
1179         const size_t             slen   = literal->value.size;
1180
1181         set_array_lower_bound_int(type, 0, 0);
1182         set_array_upper_bound_int(type, 0, slen);
1183         set_type_size_bytes(type, slen);
1184         set_type_state(type, layout_fixed);
1185
1186         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1187         for(size_t i = 0; i < slen; ++i) {
1188                 tvs[i] = new_tarval_from_long(string[i], mode);
1189         }
1190
1191         set_array_entity_values(entity, tvs, slen);
1192         free(tvs);
1193
1194         return create_symconst(dbgi, mode_P_data, entity);
1195 }
1196
1197 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1198                                       ir_node *const addr)
1199 {
1200         ir_type *irtype = get_ir_type(type);
1201         if (is_compound_type(irtype)
1202                         || is_Method_type(irtype)
1203                         || is_Array_type(irtype)) {
1204                 return addr;
1205         }
1206
1207         ir_mode *const mode     = get_type_mode(irtype);
1208         ir_node *const memory   = get_store();
1209         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1210         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1211         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1212
1213         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1214                 set_Load_volatility(load, volatility_is_volatile);
1215         }
1216
1217         set_store(load_mem);
1218         return load_res;
1219 }
1220
1221 /**
1222  * Creates a strict Conv if neccessary.
1223  */
1224 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1225 {
1226         ir_mode *mode = get_irn_mode(node);
1227
1228         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1229                 return node;
1230         if (!mode_is_float(mode))
1231                 return node;
1232
1233         /* check if there is already a Conv */
1234         if (is_Conv(node)) {
1235                 /* convert it into a strict Conv */
1236                 set_Conv_strict(node, 1);
1237                 return node;
1238         }
1239
1240         /* otherwise create a new one */
1241         return new_d_strictConv(dbgi, node, mode);
1242 }
1243
1244 static ir_node *get_global_var_address(dbg_info *const dbgi,
1245                                        const declaration_t *const decl)
1246 {
1247         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1248
1249         ir_entity *const entity = decl->v.entity;
1250         switch ((storage_class_tag_t)decl->storage_class) {
1251                 case STORAGE_CLASS_THREAD:
1252                 case STORAGE_CLASS_THREAD_EXTERN:
1253                 case STORAGE_CLASS_THREAD_STATIC: {
1254                         ir_node *const no_mem = new_NoMem();
1255                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1256                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1257                 }
1258
1259                 default:
1260                         return create_symconst(dbgi, mode_P_data, entity);
1261         }
1262 }
1263
1264 /**
1265  * Returns the correct base address depending on whether it is a parameter or a
1266  * normal local variable.
1267  */
1268 static ir_node *get_local_frame(ir_entity *const ent)
1269 {
1270         ir_graph      *const irg   = current_ir_graph;
1271         const ir_type *const owner = get_entity_owner(ent);
1272         if (owner == get_irg_frame_type(irg)) {
1273                 return get_irg_frame(irg);
1274         } else {
1275                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1276                 return get_irg_value_param_base(irg);
1277         }
1278 }
1279
1280 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1281 {
1282         ir_mode *value_mode = get_irn_mode(value);
1283
1284         if (value_mode == dest_mode || is_Bad(value))
1285                 return value;
1286
1287         if(dest_mode == mode_b) {
1288                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1289                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1290                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1291                 return proj;
1292         }
1293
1294         return new_d_Conv(dbgi, value, dest_mode);
1295 }
1296
1297 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1298 {
1299         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1300         declaration_t *declaration = ref->declaration;
1301         type_t        *type        = skip_typeref(declaration->type);
1302
1303         /* make sure the type is constructed */
1304         (void) get_ir_type(type);
1305
1306         switch((declaration_kind_t) declaration->declaration_kind) {
1307         case DECLARATION_KIND_TYPE:
1308         case DECLARATION_KIND_UNKNOWN:
1309                 break;
1310
1311         case DECLARATION_KIND_ENUM_ENTRY: {
1312                 ir_mode *const mode = get_ir_mode(type);
1313                 return new_Const(mode, declaration->v.enum_val);
1314         }
1315
1316         case DECLARATION_KIND_LOCAL_VARIABLE: {
1317                 ir_mode *const mode = get_ir_mode(type);
1318                 return get_value(declaration->v.value_number, mode);
1319         }
1320         case DECLARATION_KIND_FUNCTION: {
1321                 ir_mode *const mode = get_ir_mode(type);
1322                 return create_symconst(dbgi, mode, declaration->v.entity);
1323         }
1324         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1325                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1326                 return deref_address(dbgi, declaration->type, addr);
1327         }
1328
1329         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1330                 ir_entity *entity = declaration->v.entity;
1331                 ir_node   *frame  = get_local_frame(entity);
1332                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1333                 return deref_address(dbgi, declaration->type, sel);
1334         }
1335
1336         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1337                 return declaration->v.vla_base;
1338
1339         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1340         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1341         case DECLARATION_KIND_COMPOUND_MEMBER:
1342         case DECLARATION_KIND_LABEL_BLOCK:
1343                 panic("not implemented reference type");
1344         }
1345
1346         panic("reference to declaration with unknown type found");
1347 }
1348
1349 static ir_node *reference_addr(const reference_expression_t *ref)
1350 {
1351         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1352         declaration_t *declaration = ref->declaration;
1353
1354         switch((declaration_kind_t) declaration->declaration_kind) {
1355         case DECLARATION_KIND_TYPE:
1356         case DECLARATION_KIND_UNKNOWN:
1357                 break;
1358         case DECLARATION_KIND_LOCAL_VARIABLE:
1359                 panic("local variable without entity has no address");
1360         case DECLARATION_KIND_FUNCTION: {
1361                 type_t *const  type = skip_typeref(ref->base.type);
1362                 ir_mode *const mode = get_ir_mode(type);
1363                 return create_symconst(dbgi, mode, declaration->v.entity);
1364         }
1365         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1366                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1367                 return addr;
1368         }
1369         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1370                 ir_entity *entity = declaration->v.entity;
1371                 ir_node   *frame  = get_local_frame(entity);
1372                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1373
1374                 return sel;
1375         }
1376
1377         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1378                 return declaration->v.vla_base;
1379
1380         case DECLARATION_KIND_ENUM_ENTRY:
1381                 panic("trying to reference enum entry");
1382
1383         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1384         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1385         case DECLARATION_KIND_COMPOUND_MEMBER:
1386         case DECLARATION_KIND_LABEL_BLOCK:
1387                 panic("not implemented reference type");
1388         }
1389
1390         panic("reference to declaration with unknown type found");
1391 }
1392
1393 /**
1394  * Transform calls to builtin functions.
1395  */
1396 static ir_node *process_builtin_call(const call_expression_t *call)
1397 {
1398         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1399
1400         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1401         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1402
1403         type_t *type = skip_typeref(builtin->base.type);
1404         assert(is_type_pointer(type));
1405
1406         type_t   *function_type = skip_typeref(type->pointer.points_to);
1407         symbol_t *symbol        = builtin->symbol;
1408
1409         switch(symbol->ID) {
1410         case T___builtin_alloca: {
1411                 if(call->arguments == NULL || call->arguments->next != NULL) {
1412                         panic("invalid number of parameters on __builtin_alloca");
1413                 }
1414                 expression_t *argument = call->arguments->expression;
1415                 ir_node      *size     = expression_to_firm(argument);
1416
1417                 ir_node *store  = get_store();
1418                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1419                                               stack_alloc);
1420                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1421                 set_store(proj_m);
1422                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1423
1424                 return res;
1425         }
1426         case T___builtin_huge_val: {
1427                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1428                 tarval  *tv   = get_mode_infinite(mode);
1429                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1430                 return   res;
1431         }
1432         case T___builtin_nan:
1433         case T___builtin_nanf:
1434         case T___builtin_nand: {
1435                 /* Ignore string for now... */
1436                 assert(is_type_function(function_type));
1437                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1438                 tarval  *tv   = get_mode_NAN(mode);
1439                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1440                 return res;
1441         }
1442         case T___builtin_va_end:
1443                 return NULL;
1444         default:
1445                 panic("Unsupported builtin found\n");
1446         }
1447 }
1448
1449 /**
1450  * Transform a call expression.
1451  * Handles some special cases, like alloca() calls, which must be resolved BEFORE the inlines runs.
1452  * Inlining routines calling alloca() is dangerous, 176.gcc for instance might allocate 2GB instead of
1453  * 256 MB if alloca is not handled right...
1454  */
1455 static ir_node *call_expression_to_firm(const call_expression_t *call)
1456 {
1457         assert(get_cur_block() != NULL);
1458
1459         expression_t *function = call->function;
1460         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1461                 return process_builtin_call(call);
1462         }
1463         if(function->kind == EXPR_REFERENCE) {
1464                 const reference_expression_t *ref = &function->reference;
1465                 declaration_t *declaration = ref->declaration;
1466
1467                 if((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1468                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1469                                 /* handle alloca() call */
1470                                 expression_t *argument = call->arguments->expression;
1471                                 ir_node      *size     = expression_to_firm(argument);
1472
1473                                 ir_node *store  = get_store();
1474                                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1475                                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1476                                               stack_alloc);
1477                                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1478                                 set_store(proj_m);
1479                                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1480
1481                                 return res;
1482                         }
1483                 }
1484         }
1485         ir_node *callee = expression_to_firm(function);
1486
1487         type_t *type = skip_typeref(function->base.type);
1488         assert(is_type_pointer(type));
1489         pointer_type_t *pointer_type = &type->pointer;
1490         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1491         assert(is_type_function(points_to));
1492         function_type_t *function_type = &points_to->function;
1493
1494         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1495
1496         int      n_parameters = 0;
1497         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1498         ir_type *new_method_type = NULL;
1499         if(function_type->variadic || function_type->unspecified_parameters) {
1500                 const call_argument_t *argument = call->arguments;
1501                 for( ; argument != NULL; argument = argument->next) {
1502                         ++n_parameters;
1503                 }
1504
1505                 /* we need to construct a new method type matching the call
1506                  * arguments... */
1507                 int n_res       = get_method_n_ress(ir_method_type);
1508                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1509                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1510                                                     n_parameters, n_res, dbgi);
1511                 set_method_calling_convention(new_method_type,
1512                                get_method_calling_convention(ir_method_type));
1513                 set_method_additional_properties(new_method_type,
1514                                get_method_additional_properties(ir_method_type));
1515                 set_method_variadicity(new_method_type,
1516                                        get_method_variadicity(ir_method_type));
1517
1518                 for(int i = 0; i < n_res; ++i) {
1519                         set_method_res_type(new_method_type, i,
1520                                             get_method_res_type(ir_method_type, i));
1521                 }
1522                 argument = call->arguments;
1523                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1524                         expression_t *expression = argument->expression;
1525                         ir_type      *irtype     = get_ir_type(expression->base.type);
1526                         set_method_param_type(new_method_type, i, irtype);
1527                 }
1528                 ir_method_type = new_method_type;
1529         } else {
1530                 n_parameters = get_method_n_params(ir_method_type);
1531         }
1532
1533         ir_node *in[n_parameters];
1534
1535         const call_argument_t *argument = call->arguments;
1536         for(int n = 0; n < n_parameters; ++n) {
1537                 expression_t *expression = argument->expression;
1538                 ir_node      *arg_node   = expression_to_firm(expression);
1539
1540                 arg_node = do_strict_conv(dbgi, arg_node);
1541
1542                 in[n] = arg_node;
1543
1544                 argument = argument->next;
1545         }
1546
1547         ir_node  *store = get_store();
1548         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1549                                      ir_method_type);
1550         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1551         set_store(mem);
1552
1553         type_t  *return_type = skip_typeref(function_type->return_type);
1554         ir_node *result      = NULL;
1555
1556         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1557                 ir_mode *mode;
1558                 if(is_type_scalar(return_type)) {
1559                         mode = get_ir_mode(return_type);
1560                 } else {
1561                         mode = mode_P_data;
1562                 }
1563                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1564                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1565         }
1566
1567         return result;
1568 }
1569
1570 static void statement_to_firm(statement_t *statement);
1571 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1572
1573 static ir_node *expression_to_addr(const expression_t *expression);
1574 static void create_condition_evaluation(const expression_t *expression,
1575                                         ir_node *true_block,
1576                                         ir_node *false_block);
1577
1578 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1579                          ir_node *value)
1580 {
1581         value = do_strict_conv(dbgi, value);
1582
1583         ir_node *memory = get_store();
1584
1585         if(is_type_scalar(type)) {
1586                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1587                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1588                 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1589                         set_Store_volatility(store, volatility_is_volatile);
1590                 set_store(store_mem);
1591         } else {
1592                 ir_type *irtype    = get_ir_type(type);
1593                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1594                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1595                 set_store(copyb_mem);
1596         }
1597 }
1598
1599 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1600 {
1601         tarval *all_one   = get_mode_all_one(mode);
1602         int     mode_size = get_mode_size_bits(mode);
1603
1604         assert(offset >= 0 && size >= 0);
1605         assert(offset + size <= mode_size);
1606         if(size == mode_size) {
1607                 return all_one;
1608         }
1609
1610         long    shiftr    = get_mode_size_bits(mode) - size;
1611         long    shiftl    = offset;
1612         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1613         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1614         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1615         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1616
1617         return mask1;
1618 }
1619
1620 static void bitfield_store_to_firm(const select_expression_t *expression,
1621                                    ir_node *addr, ir_node *value)
1622 {
1623         type_t       *type   = expression->base.type;
1624         ir_mode      *mode   = get_ir_mode(type);
1625
1626         assert(get_irn_mode(value) == mode || is_Bad(value));
1627
1628         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1629
1630         /* kill upper bits of value and shift to right position */
1631         ir_entity *entity       = expression->compound_entry->v.entity;
1632         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1633         ir_type   *entity_type  = get_entity_type(entity);
1634         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1635
1636         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1637         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1638         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1639         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1640         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1641         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1642
1643         /* load current value */
1644         ir_node  *mem             = get_store();
1645         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1646         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1647         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1648         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1649         tarval   *inv_mask        = tarval_not(shift_mask);
1650         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1651         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1652
1653         /* construct new value and store */
1654         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1655         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1656         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1657         set_store(store_mem);
1658
1659         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1660                 set_Load_volatility(load, volatility_is_volatile);
1661                 set_Store_volatility(store, volatility_is_volatile);
1662         }
1663 }
1664
1665 static void set_value_for_expression(const expression_t *expression,
1666                                      ir_node *value)
1667 {
1668         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1669         value          = do_strict_conv(dbgi, value);
1670
1671         if (expression->kind == EXPR_REFERENCE) {
1672                 const reference_expression_t *ref = &expression->reference;
1673
1674                 declaration_t *declaration = ref->declaration;
1675                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1676                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1677                         set_value(declaration->v.value_number, value);
1678                         return;
1679                 }
1680         }
1681
1682         ir_node *addr = expression_to_addr(expression);
1683         type_t  *type = skip_typeref(expression->base.type);
1684
1685         if (expression->kind == EXPR_SELECT) {
1686                 const select_expression_t *select = &expression->select;
1687
1688                 declaration_t *declaration = select->compound_entry;
1689                 if (declaration->type->kind == TYPE_BITFIELD) {
1690                         bitfield_store_to_firm(select, addr, value);
1691                         return;
1692                 }
1693         }
1694
1695         assign_value(dbgi, addr, type, value);
1696 }
1697
1698 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1699                 ir_node *addr)
1700 {
1701         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1702         type_t   *type     = expression->base.type;
1703         ir_mode  *mode     = get_ir_mode(type);
1704         ir_node  *mem      = get_store();
1705         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1706         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1707         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1708
1709         load_res           = create_conv(dbgi, load_res, mode_int);
1710
1711         set_store(load_mem);
1712
1713         /* kill upper bits */
1714         ir_entity *entity       = expression->compound_entry->v.entity;
1715         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1716         ir_type   *entity_type  = get_entity_type(entity);
1717         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1718         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1719         assert(shift_bitsl >= 0);
1720         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1721         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1722         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1723
1724         long       shift_bitsr  = bitoffset + shift_bitsl;
1725         assert(shift_bitsr <= (long) machine_size);
1726         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1727         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1728         ir_node   *shiftr;
1729         if(mode_is_signed(mode)) {
1730                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1731         } else {
1732                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1733         }
1734
1735         return create_conv(dbgi, shiftr, mode);
1736 }
1737
1738
1739
1740 static ir_node *create_incdec(const unary_expression_t *expression)
1741 {
1742         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1743         const expression_t *value_expr  = expression->value;
1744         type_t             *value_type  = skip_typeref(value_expr->base.type);
1745         ir_mode            *value_mode  = get_ir_mode(value_type);
1746         ir_node            *value_addr;
1747         ir_node            *value;
1748         int                 value_number;
1749
1750         if (value_expr->kind == EXPR_REFERENCE) {
1751                 const reference_expression_t *ref = &value_expr->reference;
1752
1753                 declaration_t *declaration = ref->declaration;
1754                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1755                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1756                         value_number = declaration->v.value_number;
1757                         value        = get_value(value_number, value_mode);
1758                         value_addr   = NULL;
1759                 } else {
1760                         goto need_addr;
1761                 }
1762         } else {
1763 need_addr:
1764                 value_addr = expression_to_addr(value_expr);
1765                 if (value_expr->kind == EXPR_SELECT &&
1766                                 value_expr->select.compound_entry->type->kind == TYPE_BITFIELD){
1767                         value = bitfield_extract_to_firm(&value_expr->select, value_addr);
1768                 } else {
1769                         value = deref_address(dbgi, value_type, value_addr);
1770                 }
1771         }
1772
1773         type_t  *type = skip_typeref(expression->base.type);
1774         ir_mode *mode = get_ir_mode(expression->base.type);
1775
1776         ir_node *offset;
1777         if(is_type_pointer(type)) {
1778                 pointer_type_t *pointer_type = &type->pointer;
1779                 offset                       = get_type_size(pointer_type->points_to);
1780         } else {
1781                 assert(is_type_arithmetic(type));
1782                 offset = new_Const(mode, get_mode_one(mode));
1783         }
1784
1785         ir_node *result;
1786         ir_node *store_value;
1787         switch(expression->base.kind) {
1788         case EXPR_UNARY_POSTFIX_INCREMENT:
1789                 result      = value;
1790                 store_value = new_d_Add(dbgi, value, offset, mode);
1791                 break;
1792         case EXPR_UNARY_POSTFIX_DECREMENT:
1793                 result      = value;
1794                 store_value = new_d_Sub(dbgi, value, offset, mode);
1795                 break;
1796         case EXPR_UNARY_PREFIX_INCREMENT:
1797                 result      = new_d_Add(dbgi, value, offset, mode);
1798                 store_value = result;
1799                 break;
1800         case EXPR_UNARY_PREFIX_DECREMENT:
1801                 result      = new_d_Sub(dbgi, value, offset, mode);
1802                 store_value = result;
1803                 break;
1804         default:
1805                 panic("no incdec expr in create_incdec");
1806         }
1807
1808         if (value_addr == NULL) {
1809                 set_value(value_number, store_value);
1810         } else {
1811                 if (value_expr->kind == EXPR_SELECT &&
1812                                 value_expr->select.compound_entry->type->kind == TYPE_BITFIELD){
1813                         bitfield_store_to_firm(&value_expr->select, value_addr, store_value);
1814                 } else {
1815                         assign_value(dbgi, value_addr, value_type, store_value);
1816                 }
1817         }
1818
1819         return result;
1820 }
1821
1822 static bool is_local_variable(expression_t *expression)
1823 {
1824         if (expression->kind != EXPR_REFERENCE)
1825                 return false;
1826         reference_expression_t *ref_expr    = &expression->reference;
1827         declaration_t          *declaration = ref_expr->declaration;
1828         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1829 }
1830
1831 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1832 {
1833         switch(kind) {
1834         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1835         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1836         case EXPR_BINARY_NOTEQUAL:
1837                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1838         case EXPR_BINARY_ISLESS:
1839         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1840         case EXPR_BINARY_ISLESSEQUAL:
1841         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1842         case EXPR_BINARY_ISGREATER:
1843         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1844         case EXPR_BINARY_ISGREATEREQUAL:
1845         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1846         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1847
1848         default:
1849                 break;
1850         }
1851         panic("trying to get pn_Cmp from non-comparison binexpr type");
1852 }
1853
1854 /**
1855  * Handle the assume optimizer hint: check if a Confirm
1856  * node can be created.
1857  *
1858  * @param dbi    debug info
1859  * @param expr   the IL assume expression
1860  *
1861  * we support here only some simple cases:
1862  *  - var rel const
1863  *  - const rel val
1864  *  - var rel var
1865  */
1866 static ir_node *handle_assume_compare(dbg_info *dbi,
1867                                       const binary_expression_t *expression)
1868 {
1869         expression_t  *op1 = expression->left;
1870         expression_t  *op2 = expression->right;
1871         declaration_t *var2, *var = NULL;
1872         ir_node       *res = NULL;
1873         pn_Cmp         cmp_val;
1874
1875         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1876
1877         if (is_local_variable(op1) && is_local_variable(op2)) {
1878         var  = op1->reference.declaration;
1879             var2 = op2->reference.declaration;
1880
1881                 type_t  *const type = skip_typeref(var->type);
1882                 ir_mode *const mode = get_ir_mode(type);
1883
1884                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1885                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1886
1887                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1888                 set_value(var2->v.value_number, res);
1889
1890                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1891                 set_value(var->v.value_number, res);
1892
1893                 return res;
1894         }
1895
1896         expression_t *con;
1897         if (is_local_variable(op1) && is_constant_expression(op2)) {
1898                 var = op1->reference.declaration;
1899                 con = op2;
1900         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1901                 cmp_val = get_inversed_pnc(cmp_val);
1902                 var = op2->reference.declaration;
1903                 con = op1;
1904         }
1905
1906         if (var != NULL) {
1907                 type_t  *const type = skip_typeref(var->type);
1908                 ir_mode *const mode = get_ir_mode(type);
1909
1910                 res = get_value(var->v.value_number, mode);
1911                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1912                 set_value(var->v.value_number, res);
1913         }
1914         return res;
1915 }
1916
1917 /**
1918  * Handle the assume optimizer hint.
1919  *
1920  * @param dbi    debug info
1921  * @param expr   the IL assume expression
1922  */
1923 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1924         switch(expression->kind) {
1925         case EXPR_BINARY_EQUAL:
1926         case EXPR_BINARY_NOTEQUAL:
1927         case EXPR_BINARY_LESS:
1928         case EXPR_BINARY_LESSEQUAL:
1929         case EXPR_BINARY_GREATER:
1930         case EXPR_BINARY_GREATEREQUAL:
1931                 return handle_assume_compare(dbi, &expression->binary);
1932         default:
1933                 return NULL;
1934         }
1935 }
1936
1937 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1938 {
1939         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1940         type_t   *type = skip_typeref(expression->base.type);
1941
1942         if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1943                 return expression_to_addr(expression->value);
1944
1945         const expression_t *value = expression->value;
1946
1947         switch(expression->base.kind) {
1948         case EXPR_UNARY_NEGATE: {
1949                 ir_node *value_node = expression_to_firm(value);
1950                 ir_mode *mode = get_ir_mode(type);
1951                 return new_d_Minus(dbgi, value_node, mode);
1952         }
1953         case EXPR_UNARY_PLUS:
1954                 return expression_to_firm(value);
1955         case EXPR_UNARY_BITWISE_NEGATE: {
1956                 ir_node *value_node = expression_to_firm(value);
1957                 ir_mode *mode = get_ir_mode(type);
1958                 return new_d_Not(dbgi, value_node, mode);
1959         }
1960         case EXPR_UNARY_NOT: {
1961                 ir_node *value_node = _expression_to_firm(value);
1962                 value_node          = create_conv(dbgi, value_node, mode_b);
1963                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
1964                 return res;
1965         }
1966         case EXPR_UNARY_DEREFERENCE: {
1967                 ir_node *value_node = expression_to_firm(value);
1968                 type_t  *value_type = skip_typeref(value->base.type);
1969                 assert(is_type_pointer(value_type));
1970                 type_t  *points_to  = value_type->pointer.points_to;
1971                 return deref_address(dbgi, points_to, value_node);
1972         }
1973         case EXPR_UNARY_POSTFIX_INCREMENT:
1974         case EXPR_UNARY_POSTFIX_DECREMENT:
1975         case EXPR_UNARY_PREFIX_INCREMENT:
1976         case EXPR_UNARY_PREFIX_DECREMENT:
1977                 return create_incdec(expression);
1978         case EXPR_UNARY_CAST: {
1979                 ir_node *value_node = expression_to_firm(value);
1980                 if(is_type_scalar(type)) {
1981                         ir_mode *mode = get_ir_mode(type);
1982                         ir_node *node = create_conv(dbgi, value_node, mode);
1983                         node = do_strict_conv(dbgi, node);
1984                         return node;
1985                 } else {
1986                         /* make sure firm type is constructed */
1987                         (void) get_ir_type(type);
1988                         return value_node;
1989                 }
1990         }
1991         case EXPR_UNARY_CAST_IMPLICIT: {
1992                 ir_node *value_node = expression_to_firm(value);
1993                 if(is_type_scalar(type)) {
1994                         ir_mode *mode = get_ir_mode(type);
1995                         return create_conv(dbgi, value_node, mode);
1996                 } else {
1997                         return value_node;
1998                 }
1999         }
2000         case EXPR_UNARY_ASSUME:
2001                 if(firm_opt.confirm)
2002                         return handle_assume(dbgi, value);
2003                 else
2004                         return NULL;
2005
2006         default:
2007                 break;
2008         }
2009         panic("invalid UNEXPR type found");
2010 }
2011
2012 /**
2013  * produces a 0/1 depending of the value of a mode_b node
2014  */
2015 static ir_node *produce_condition_result(const expression_t *expression,
2016                                          dbg_info *dbgi)
2017 {
2018         ir_mode *mode      = get_ir_mode(expression->base.type);
2019         ir_node *cur_block = get_cur_block();
2020
2021         ir_node *one_block = new_immBlock();
2022         ir_node *one       = new_Const(mode, get_mode_one(mode));
2023         ir_node *jmp_one   = new_d_Jmp(dbgi);
2024
2025         ir_node *zero_block = new_immBlock();
2026         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2027         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2028
2029         set_cur_block(cur_block);
2030         create_condition_evaluation(expression, one_block, zero_block);
2031         mature_immBlock(one_block);
2032         mature_immBlock(zero_block);
2033
2034         ir_node *common_block = new_immBlock();
2035         add_immBlock_pred(common_block, jmp_one);
2036         add_immBlock_pred(common_block, jmp_zero);
2037         mature_immBlock(common_block);
2038
2039         ir_node *in[2] = { one, zero };
2040         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2041
2042         return val;
2043 }
2044
2045 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2046                 ir_node *value, type_t *type)
2047 {
2048         pointer_type_t *const pointer_type = &type->pointer;
2049         type_t         *const points_to    = pointer_type->points_to;
2050         const unsigned        elem_size    = get_type_size_const(points_to);
2051
2052         assert(elem_size >= 1);
2053         if (elem_size == 1)
2054                 return value;
2055
2056         value = create_conv(dbgi, value, mode_int);
2057         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2058         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2059         return mul;
2060 }
2061
2062 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2063                           ir_node *left, ir_node *right)
2064 {
2065         ir_mode  *mode;
2066         type_t   *type_left  = skip_typeref(expression->left->base.type);
2067         type_t   *type_right = skip_typeref(expression->right->base.type);
2068
2069         expression_kind_t kind = expression->base.kind;
2070
2071         switch (kind) {
2072         case EXPR_BINARY_SHIFTLEFT:
2073         case EXPR_BINARY_SHIFTRIGHT:
2074         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2075         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2076                 mode  = get_irn_mode(left);
2077                 right = create_conv(dbgi, right, mode_uint);
2078                 break;
2079
2080         case EXPR_BINARY_SUB:
2081                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2082                         const pointer_type_t *const ptr_type = &type_left->pointer;
2083
2084                         mode = get_ir_mode(expression->base.type);
2085                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2086                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2087                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2088                         ir_node *const no_mem    = new_NoMem();
2089                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2090                                                                                                    mode, op_pin_state_floats);
2091                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2092                 }
2093                 /* fallthrough */
2094         case EXPR_BINARY_SUB_ASSIGN:
2095                 if (is_type_pointer(type_left)) {
2096                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2097                         mode  = get_ir_mode(type_left);
2098                         break;
2099                 }
2100                 goto normal_node;
2101
2102         case EXPR_BINARY_ADD:
2103         case EXPR_BINARY_ADD_ASSIGN:
2104                 if (is_type_pointer(type_left)) {
2105                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2106                         mode  = get_ir_mode(type_left);
2107                         break;
2108                 } else if (is_type_pointer(type_right)) {
2109                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2110                         mode  = get_ir_mode(type_right);
2111                         break;
2112                 }
2113                 goto normal_node;
2114
2115         default:
2116 normal_node:
2117                 mode = get_irn_mode(right);
2118                 left = create_conv(dbgi, left, mode);
2119                 break;
2120         }
2121
2122         switch (kind) {
2123         case EXPR_BINARY_ADD_ASSIGN:
2124         case EXPR_BINARY_ADD:
2125                 return new_d_Add(dbgi, left, right, mode);
2126         case EXPR_BINARY_SUB_ASSIGN:
2127         case EXPR_BINARY_SUB:
2128                 return new_d_Sub(dbgi, left, right, mode);
2129         case EXPR_BINARY_MUL_ASSIGN:
2130         case EXPR_BINARY_MUL:
2131                 return new_d_Mul(dbgi, left, right, mode);
2132         case EXPR_BINARY_BITWISE_AND:
2133         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2134                 return new_d_And(dbgi, left, right, mode);
2135         case EXPR_BINARY_BITWISE_OR:
2136         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2137                 return new_d_Or(dbgi, left, right, mode);
2138         case EXPR_BINARY_BITWISE_XOR:
2139         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2140                 return new_d_Eor(dbgi, left, right, mode);
2141         case EXPR_BINARY_SHIFTLEFT:
2142         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2143                 return new_d_Shl(dbgi, left, right, mode);
2144         case EXPR_BINARY_SHIFTRIGHT:
2145         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2146                 if (mode_is_signed(mode)) {
2147                         return new_d_Shrs(dbgi, left, right, mode);
2148                 } else {
2149                         return new_d_Shr(dbgi, left, right, mode);
2150                 }
2151         case EXPR_BINARY_DIV:
2152         case EXPR_BINARY_DIV_ASSIGN: {
2153                 ir_node *pin = new_Pin(new_NoMem());
2154                 ir_node *op;
2155                 ir_node *res;
2156                 if(mode_is_float(mode)) {
2157                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2158                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2159                 } else {
2160                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2161                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2162                 }
2163                 return res;
2164         }
2165         case EXPR_BINARY_MOD:
2166         case EXPR_BINARY_MOD_ASSIGN: {
2167                 ir_node *pin = new_Pin(new_NoMem());
2168                 assert(!mode_is_float(mode));
2169                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2170                                          op_pin_state_floats);
2171                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2172                 return res;
2173         }
2174         default:
2175                 panic("unexpected expression kind");
2176         }
2177 }
2178
2179 static ir_node *create_lazy_op(const binary_expression_t *expression)
2180 {
2181         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2182         type_t   *type = expression->base.type;
2183         ir_mode  *mode = get_ir_mode(type);
2184
2185         if(is_constant_expression(expression->left)) {
2186                 long val = fold_constant(expression->left);
2187                 expression_kind_t ekind = expression->base.kind;
2188                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
2189                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2190                         return expression_to_firm(expression->right);
2191                 } else {
2192                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
2193                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
2194                         return new_Const(mode, get_mode_one(mode));
2195                 }
2196         }
2197
2198         return produce_condition_result((const expression_t*) expression, dbgi);
2199 }
2200
2201 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2202                                             ir_node *right, ir_mode *mode);
2203
2204 static ir_node *create_assign_binop(const binary_expression_t *expression)
2205 {
2206         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2207         const expression_t *left_expr  = expression->left;
2208         ir_mode            *left_mode  = get_ir_mode(left_expr->base.type);
2209         type_t             *left_type  = skip_typeref(left_expr->base.type);
2210         ir_node            *left_addr;
2211         int                 value_number;
2212         ir_node            *left;
2213
2214         if (left_expr->kind == EXPR_REFERENCE) {
2215                 const reference_expression_t *ref = &left_expr->reference;
2216
2217                 declaration_t *declaration = ref->declaration;
2218                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
2219                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2220                         value_number       = declaration->v.value_number;
2221                         left               = get_value(value_number, left_mode);
2222                         left_addr          = NULL;
2223                 } else {
2224                         goto need_addr;
2225                 }
2226         } else {
2227 need_addr:
2228                 left_addr = expression_to_addr(left_expr);
2229                 if (left_expr->kind == EXPR_SELECT &&
2230                                 left_expr->select.compound_entry->type->kind == TYPE_BITFIELD) {
2231                         left = bitfield_extract_to_firm(&left_expr->select, left_addr);
2232                 } else {
2233                         left = deref_address(dbgi, left_type, left_addr);
2234                 }
2235         }
2236
2237         ir_node *right = expression_to_firm(expression->right);
2238
2239         ir_node *result = create_op(dbgi, expression, left, right);
2240
2241         result = create_conv(dbgi, result, left_mode);
2242         if (left_addr == NULL) {
2243                 set_value(value_number, result);
2244         } else {
2245                 if (left_expr->kind == EXPR_SELECT &&
2246                                 left_expr->select.compound_entry->type->kind == TYPE_BITFIELD) {
2247                         bitfield_store_to_firm(&left_expr->select, left_addr, result);
2248                 } else {
2249                         assign_value(dbgi, left_addr, left_type, result);
2250                 }
2251         }
2252
2253         return result;
2254 }
2255
2256 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2257 {
2258         expression_kind_t kind = expression->base.kind;
2259
2260         switch(kind) {
2261         case EXPR_BINARY_EQUAL:
2262         case EXPR_BINARY_NOTEQUAL:
2263         case EXPR_BINARY_LESS:
2264         case EXPR_BINARY_LESSEQUAL:
2265         case EXPR_BINARY_GREATER:
2266         case EXPR_BINARY_GREATEREQUAL:
2267         case EXPR_BINARY_ISGREATER:
2268         case EXPR_BINARY_ISGREATEREQUAL:
2269         case EXPR_BINARY_ISLESS:
2270         case EXPR_BINARY_ISLESSEQUAL:
2271         case EXPR_BINARY_ISLESSGREATER:
2272         case EXPR_BINARY_ISUNORDERED: {
2273                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2274                 ir_node *left  = expression_to_firm(expression->left);
2275                 ir_node *right = expression_to_firm(expression->right);
2276                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2277                 long     pnc   = get_pnc(kind, expression->left->base.type);
2278                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2279                 return proj;
2280         }
2281         case EXPR_BINARY_ASSIGN: {
2282                 ir_node *right = expression_to_firm(expression->right);
2283                 set_value_for_expression(expression->left, right);
2284
2285                 return right;
2286         }
2287         case EXPR_BINARY_ADD:
2288         case EXPR_BINARY_SUB:
2289         case EXPR_BINARY_MUL:
2290         case EXPR_BINARY_DIV:
2291         case EXPR_BINARY_MOD:
2292         case EXPR_BINARY_BITWISE_AND:
2293         case EXPR_BINARY_BITWISE_OR:
2294         case EXPR_BINARY_BITWISE_XOR:
2295         case EXPR_BINARY_SHIFTLEFT:
2296         case EXPR_BINARY_SHIFTRIGHT:
2297         {
2298                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2299                 ir_node  *left  = expression_to_firm(expression->left);
2300                 ir_node  *right = expression_to_firm(expression->right);
2301                 return create_op(dbgi, expression, left, right);
2302         }
2303         case EXPR_BINARY_LOGICAL_AND:
2304         case EXPR_BINARY_LOGICAL_OR:
2305                 return create_lazy_op(expression);
2306         case EXPR_BINARY_COMMA:
2307                 /* create side effects of left side */
2308                 (void) expression_to_firm(expression->left);
2309                 return _expression_to_firm(expression->right);
2310
2311         case EXPR_BINARY_ADD_ASSIGN:
2312         case EXPR_BINARY_SUB_ASSIGN:
2313         case EXPR_BINARY_MUL_ASSIGN:
2314         case EXPR_BINARY_MOD_ASSIGN:
2315         case EXPR_BINARY_DIV_ASSIGN:
2316         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2317         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2318         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2319         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2320         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2321                 return create_assign_binop(expression);
2322         case EXPR_BINARY_BUILTIN_EXPECT:
2323                 return _expression_to_firm(expression->left);
2324         default:
2325                 panic("TODO binexpr type");
2326         }
2327 }
2328
2329 static ir_node *array_access_addr(const array_access_expression_t *expression)
2330 {
2331         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2332         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2333         ir_node  *offset    = expression_to_firm(expression->index);
2334
2335         /* Matze: it would be better to force mode to mode_uint as this creates more
2336          * opportunities for CSE. Unforunately we still have some optimisations that
2337          * are too conservative in the presence of convs. So we better go with the
2338          * mode of offset and avoid the conv */
2339         ir_mode  *mode = get_irn_mode(offset);
2340         offset         = create_conv(dbgi, offset, mode);
2341
2342         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2343         assert(is_type_pointer(ref_type));
2344         pointer_type_t *pointer_type = &ref_type->pointer;
2345
2346         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2347         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2348         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2349                                              mode);
2350         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2351
2352         return result;
2353 }
2354
2355 static ir_node *array_access_to_firm(
2356                 const array_access_expression_t *expression)
2357 {
2358         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2359         ir_node  *addr   = array_access_addr(expression);
2360         type_t   *type   = revert_automatic_type_conversion(
2361                         (const expression_t*) expression);
2362         type             = skip_typeref(type);
2363
2364         return deref_address(dbgi, type, addr);
2365 }
2366
2367 static long get_offsetof_offset(const offsetof_expression_t *expression)
2368 {
2369         type_t *orig_type = expression->type;
2370         long    offset    = 0;
2371
2372         designator_t *designator = expression->designator;
2373         for( ; designator != NULL; designator = designator->next) {
2374                 type_t *type = skip_typeref(orig_type);
2375                 /* be sure the type is constructed */
2376                 (void) get_ir_type(type);
2377
2378                 if(designator->symbol != NULL) {
2379                         assert(is_type_compound(type));
2380                         symbol_t *symbol = designator->symbol;
2381
2382                         declaration_t *declaration = type->compound.declaration;
2383                         declaration_t *iter        = declaration->scope.declarations;
2384                         for( ; iter != NULL; iter = iter->next) {
2385                                 if(iter->symbol == symbol) {
2386                                         break;
2387                                 }
2388                         }
2389                         assert(iter != NULL);
2390
2391                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2392                         offset += get_entity_offset(iter->v.entity);
2393
2394                         orig_type = iter->type;
2395                 } else {
2396                         expression_t *array_index = designator->array_index;
2397                         assert(designator->array_index != NULL);
2398                         assert(is_type_array(type));
2399                         assert(is_type_valid(array_index->base.type));
2400
2401                         long index         = fold_constant(array_index);
2402                         ir_type *arr_type  = get_ir_type(type);
2403                         ir_type *elem_type = get_array_element_type(arr_type);
2404                         long     elem_size = get_type_size_bytes(elem_type);
2405
2406                         offset += index * elem_size;
2407
2408                         orig_type = type->array.element_type;
2409                 }
2410         }
2411
2412         return offset;
2413 }
2414
2415 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2416 {
2417         ir_mode  *mode   = get_ir_mode(expression->base.type);
2418         long      offset = get_offsetof_offset(expression);
2419         tarval   *tv     = new_tarval_from_long(offset, mode);
2420         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2421
2422         return new_d_Const(dbgi, mode, tv);
2423 }
2424
2425 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2426                                      ir_entity *entity, type_t *type);
2427
2428 static ir_node *compound_literal_to_firm(
2429                 const compound_literal_expression_t *expression)
2430 {
2431         type_t *type = expression->type;
2432
2433         /* create an entity on the stack */
2434         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2435
2436         ident     *const id     = id_unique("CompLit.%u");
2437         ir_type   *const irtype = get_ir_type(type);
2438         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2439         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2440         set_entity_ld_ident(entity, id);
2441
2442         set_entity_variability(entity, variability_uninitialized);
2443
2444         /* create initialisation code */
2445         initializer_t *initializer = expression->initializer;
2446         create_local_initializer(initializer, dbgi, entity, type);
2447
2448         /* create a sel for the compound literal address */
2449         ir_node *frame = get_local_frame(entity);
2450         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2451         return sel;
2452 }
2453
2454 /**
2455  * Transform a sizeof expression into Firm code.
2456  */
2457 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2458 {
2459         type_t *type = expression->type;
2460         if(type == NULL) {
2461                 type = expression->tp_expression->base.type;
2462                 assert(type != NULL);
2463         }
2464
2465         type = skip_typeref(type);
2466         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2467         if(is_type_array(type) && type->array.is_vla
2468                         && expression->tp_expression != NULL) {
2469                 expression_to_firm(expression->tp_expression);
2470         }
2471
2472         return get_type_size(type);
2473 }
2474
2475 /**
2476  * Transform an alignof expression into Firm code.
2477  */
2478 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2479 {
2480         type_t *type = expression->type;
2481         if(type == NULL) {
2482                 /* beware: if expression is a variable reference, return the
2483                    alignment of the variable. */
2484                 const expression_t *tp_expression = expression->tp_expression;
2485                 const declaration_t *declaration = expr_is_variable(tp_expression);
2486                 if (declaration != NULL) {
2487                         /* TODO: get the alignment of this variable. */
2488                 }
2489                 type = tp_expression->base.type;
2490                 assert(type != NULL);
2491         }
2492
2493         ir_mode *const mode = get_ir_mode(expression->base.type);
2494         symconst_symbol sym;
2495         sym.type_p = get_ir_type(type);
2496         return new_SymConst(mode, sym, symconst_type_align);
2497 }
2498
2499 static bool constant_folding;
2500
2501 static void init_ir_types(void);
2502 long fold_constant(const expression_t *expression)
2503 {
2504         bool constant_folding_old = constant_folding;
2505         constant_folding = true;
2506
2507         init_ir_types();
2508
2509         assert(is_constant_expression(expression));
2510
2511         ir_graph *old_current_ir_graph = current_ir_graph;
2512         if(current_ir_graph == NULL) {
2513                 current_ir_graph = get_const_code_irg();
2514         }
2515
2516         ir_node *cnst = expression_to_firm(expression);
2517         current_ir_graph = old_current_ir_graph;
2518
2519         if(!is_Const(cnst)) {
2520                 panic("couldn't fold constant\n");
2521         }
2522
2523         tarval *tv = get_Const_tarval(cnst);
2524         if(!tarval_is_long(tv)) {
2525                 panic("result of constant folding is not integer\n");
2526         }
2527
2528         constant_folding = constant_folding_old;
2529
2530         return get_tarval_long(tv);
2531 }
2532
2533 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2534 {
2535         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2536
2537         /* first try to fold a constant condition */
2538         if(is_constant_expression(expression->condition)) {
2539                 long val = fold_constant(expression->condition);
2540                 if(val) {
2541                         return expression_to_firm(expression->true_expression);
2542                 } else {
2543                         return expression_to_firm(expression->false_expression);
2544                 }
2545         }
2546
2547         ir_node *cur_block   = get_cur_block();
2548
2549         /* create the true block */
2550         ir_node *true_block  = new_immBlock();
2551
2552         ir_node *true_val = expression_to_firm(expression->true_expression);
2553         ir_node *true_jmp = new_Jmp();
2554
2555         /* create the false block */
2556         ir_node *false_block = new_immBlock();
2557
2558         ir_node *false_val = expression_to_firm(expression->false_expression);
2559         ir_node *false_jmp = new_Jmp();
2560
2561         /* create the condition evaluation */
2562         set_cur_block(cur_block);
2563         create_condition_evaluation(expression->condition, true_block, false_block);
2564         mature_immBlock(true_block);
2565         mature_immBlock(false_block);
2566
2567         /* create the common block */
2568         ir_node *common_block = new_immBlock();
2569         add_immBlock_pred(common_block, true_jmp);
2570         add_immBlock_pred(common_block, false_jmp);
2571         mature_immBlock(common_block);
2572
2573         /* TODO improve static semantics, so either both or no values are NULL */
2574         if (true_val == NULL || false_val == NULL)
2575                 return NULL;
2576
2577         ir_node *in[2] = { true_val, false_val };
2578         ir_mode *mode  = get_irn_mode(true_val);
2579         assert(get_irn_mode(false_val) == mode);
2580         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2581
2582         return val;
2583 }
2584
2585 /**
2586  * Returns an IR-node representing the address of a field.
2587  */
2588 static ir_node *select_addr(const select_expression_t *expression)
2589 {
2590         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2591
2592         ir_node *compound_addr = expression_to_firm(expression->compound);
2593
2594         /* make sure the type is constructed */
2595         type_t *type = skip_typeref(expression->compound->base.type);
2596         if (is_type_pointer(type)) {
2597                 type = type->pointer.points_to;
2598         }
2599         (void) get_ir_type(type);
2600
2601         declaration_t *entry = expression->compound_entry;
2602         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2603         ir_entity     *entity = entry->v.entity;
2604
2605         assert(entity != NULL);
2606
2607         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2608
2609         return sel;
2610 }
2611
2612 static ir_node *select_to_firm(const select_expression_t *expression)
2613 {
2614         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2615         ir_node  *addr = select_addr(expression);
2616         type_t   *type = revert_automatic_type_conversion(
2617                         (const expression_t*) expression);
2618         type           = skip_typeref(type);
2619
2620         declaration_t *entry      = expression->compound_entry;
2621         type_t        *entry_type = skip_typeref(entry->type);
2622
2623         if (entry_type->kind == TYPE_BITFIELD) {
2624                 return bitfield_extract_to_firm(expression, addr);
2625         }
2626
2627         return deref_address(dbgi, type, addr);
2628 }
2629
2630 /* Values returned by __builtin_classify_type. */
2631 typedef enum gcc_type_class
2632 {
2633         no_type_class = -1,
2634         void_type_class,
2635         integer_type_class,
2636         char_type_class,
2637         enumeral_type_class,
2638         boolean_type_class,
2639         pointer_type_class,
2640         reference_type_class,
2641         offset_type_class,
2642         real_type_class,
2643         complex_type_class,
2644         function_type_class,
2645         method_type_class,
2646         record_type_class,
2647         union_type_class,
2648         array_type_class,
2649         string_type_class,
2650         set_type_class,
2651         file_type_class,
2652         lang_type_class
2653 } gcc_type_class;
2654
2655 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2656 {
2657         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2658
2659         gcc_type_class tc;
2660         switch (type->kind)
2661         {
2662                 case TYPE_ATOMIC: {
2663                         const atomic_type_t *const atomic_type = &type->atomic;
2664                         switch (atomic_type->akind) {
2665                                 /* should not be reached */
2666                                 case ATOMIC_TYPE_INVALID:
2667                                         tc = no_type_class;
2668                                         goto make_const;
2669
2670                                 /* gcc cannot do that */
2671                                 case ATOMIC_TYPE_VOID:
2672                                         tc = void_type_class;
2673                                         goto make_const;
2674
2675                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2676                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2677                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2678                                 case ATOMIC_TYPE_SHORT:
2679                                 case ATOMIC_TYPE_USHORT:
2680                                 case ATOMIC_TYPE_INT:
2681                                 case ATOMIC_TYPE_UINT:
2682                                 case ATOMIC_TYPE_LONG:
2683                                 case ATOMIC_TYPE_ULONG:
2684                                 case ATOMIC_TYPE_LONGLONG:
2685                                 case ATOMIC_TYPE_ULONGLONG:
2686                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2687                                         tc = integer_type_class;
2688                                         goto make_const;
2689
2690                                 case ATOMIC_TYPE_FLOAT:
2691                                 case ATOMIC_TYPE_DOUBLE:
2692                                 case ATOMIC_TYPE_LONG_DOUBLE:
2693                                         tc = real_type_class;
2694                                         goto make_const;
2695                         }
2696                         panic("Unexpected atomic type in classify_type_to_firm().");
2697                 }
2698
2699                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2700                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2701                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2702                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2703                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2704                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2705                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2706                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2707
2708                 /* gcc handles this as integer */
2709                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2710
2711                 case TYPE_BUILTIN:
2712                 /* typedef/typeof should be skipped already */
2713                 case TYPE_TYPEDEF:
2714                 case TYPE_TYPEOF:
2715                 case TYPE_INVALID:
2716                 case TYPE_ERROR:
2717                         break;
2718         }
2719         panic("unexpected TYPE classify_type_to_firm().");
2720
2721 make_const: ;
2722         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2723         ir_mode  *const mode = mode_int;
2724         tarval   *const tv   = new_tarval_from_long(tc, mode);
2725         return new_d_Const(dbgi, mode, tv);
2726 }
2727
2728 static ir_node *function_name_to_firm(
2729                 const funcname_expression_t *const expr)
2730 {
2731         switch(expr->kind) {
2732         case FUNCNAME_FUNCTION:
2733         case FUNCNAME_PRETTY_FUNCTION:
2734         case FUNCNAME_FUNCDNAME:
2735                 if (current_function_name == NULL) {
2736                         const source_position_t *const src_pos = &expr->base.source_position;
2737                         const char *const name = current_function_decl->symbol->string;
2738                         const string_t string = { name, strlen(name) + 1 };
2739                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2740                 }
2741                 return current_function_name;
2742         case FUNCNAME_FUNCSIG:
2743                 if (current_funcsig == NULL) {
2744                         const source_position_t *const src_pos = &expr->base.source_position;
2745                         ir_entity *ent = get_irg_entity(current_ir_graph);
2746                         const char *const name = get_entity_ld_name(ent);
2747                         const string_t string = { name, strlen(name) + 1 };
2748                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2749                 }
2750                 return current_funcsig;
2751         }
2752         panic("Unsupported function name");
2753 }
2754
2755 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2756 {
2757         statement_t *statement = expr->statement;
2758
2759         assert(statement->kind == STATEMENT_COMPOUND);
2760         return compound_statement_to_firm(&statement->compound);
2761 }
2762
2763 static ir_node *va_start_expression_to_firm(
2764         const va_start_expression_t *const expr)
2765 {
2766         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2767         int        const n           = get_method_n_params(method_type) - 1;
2768         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2769         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2770         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2771         ir_node   *const no_mem      = new_NoMem();
2772         ir_node   *const arg_sel     =
2773                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2774
2775         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2776         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2777         set_value_for_expression(expr->ap, add);
2778
2779         return NULL;
2780 }
2781
2782 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2783 {
2784         type_t   *const type = expr->base.type;
2785         ir_node  *const ap   = expression_to_firm(expr->ap);
2786         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2787         ir_node  *const res  = deref_address(dbgi, type, ap);
2788
2789         ir_node  *const cnst = get_type_size(expr->base.type);
2790         ir_node  *const add  = new_d_Add(dbgi, ap, cnst, mode_P_data);
2791         set_value_for_expression(expr->ap, add);
2792
2793         return res;
2794 }
2795
2796 static ir_node *dereference_addr(const unary_expression_t *const expression)
2797 {
2798         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2799         return expression_to_firm(expression->value);
2800 }
2801
2802 /**
2803  * Returns a IR-node representing an lvalue of the given expression.
2804  */
2805 static ir_node *expression_to_addr(const expression_t *expression)
2806 {
2807         switch(expression->kind) {
2808         case EXPR_REFERENCE:
2809                 return reference_addr(&expression->reference);
2810         case EXPR_ARRAY_ACCESS:
2811                 return array_access_addr(&expression->array_access);
2812         case EXPR_SELECT:
2813                 return select_addr(&expression->select);
2814         case EXPR_CALL:
2815                 return call_expression_to_firm(&expression->call);
2816         case EXPR_UNARY_DEREFERENCE: {
2817                 return dereference_addr(&expression->unary);
2818         }
2819         default:
2820                 break;
2821         }
2822         panic("trying to get address of non-lvalue");
2823 }
2824
2825 static ir_node *builtin_constant_to_firm(
2826                 const builtin_constant_expression_t *expression)
2827 {
2828         ir_mode *mode = get_ir_mode(expression->base.type);
2829         long     v;
2830
2831         if (is_constant_expression(expression->value)) {
2832                 v = 1;
2833         } else {
2834                 v = 0;
2835         }
2836         return new_Const_long(mode, v);
2837 }
2838
2839 static ir_node *builtin_prefetch_to_firm(
2840                 const builtin_prefetch_expression_t *expression)
2841 {
2842         ir_node *adr = expression_to_firm(expression->adr);
2843         /* no Firm support for prefetch yet */
2844         (void) adr;
2845         return NULL;
2846 }
2847
2848 /**
2849  * creates firm nodes for an expression. The difference between this function
2850  * and expression_to_firm is, that this version might produce mode_b nodes
2851  * instead of mode_Is.
2852  */
2853 static ir_node *_expression_to_firm(const expression_t *expression)
2854 {
2855 #ifndef NDEBUG
2856         if (!constant_folding) {
2857                 assert(!expression->base.transformed);
2858                 ((expression_t*) expression)->base.transformed = true;
2859         }
2860 #endif
2861
2862         switch(expression->kind) {
2863         case EXPR_CHARACTER_CONSTANT:
2864                 return character_constant_to_firm(&expression->conste);
2865         case EXPR_WIDE_CHARACTER_CONSTANT:
2866                 return wide_character_constant_to_firm(&expression->conste);
2867         case EXPR_CONST:
2868                 return const_to_firm(&expression->conste);
2869         case EXPR_STRING_LITERAL:
2870                 return string_literal_to_firm(&expression->string);
2871         case EXPR_WIDE_STRING_LITERAL:
2872                 return wide_string_literal_to_firm(&expression->wide_string);
2873         case EXPR_REFERENCE:
2874                 return reference_expression_to_firm(&expression->reference);
2875         case EXPR_CALL:
2876                 return call_expression_to_firm(&expression->call);
2877         EXPR_UNARY_CASES
2878                 return unary_expression_to_firm(&expression->unary);
2879         EXPR_BINARY_CASES
2880                 return binary_expression_to_firm(&expression->binary);
2881         case EXPR_ARRAY_ACCESS:
2882                 return array_access_to_firm(&expression->array_access);
2883         case EXPR_SIZEOF:
2884                 return sizeof_to_firm(&expression->typeprop);
2885         case EXPR_ALIGNOF:
2886                 return alignof_to_firm(&expression->typeprop);
2887         case EXPR_CONDITIONAL:
2888                 return conditional_to_firm(&expression->conditional);
2889         case EXPR_SELECT:
2890                 return select_to_firm(&expression->select);
2891         case EXPR_CLASSIFY_TYPE:
2892                 return classify_type_to_firm(&expression->classify_type);
2893         case EXPR_FUNCNAME:
2894                 return function_name_to_firm(&expression->funcname);
2895         case EXPR_STATEMENT:
2896                 return statement_expression_to_firm(&expression->statement);
2897         case EXPR_VA_START:
2898                 return va_start_expression_to_firm(&expression->va_starte);
2899         case EXPR_VA_ARG:
2900                 return va_arg_expression_to_firm(&expression->va_arge);
2901         case EXPR_BUILTIN_SYMBOL:
2902                 panic("unimplemented expression found");
2903         case EXPR_BUILTIN_CONSTANT_P:
2904                 return builtin_constant_to_firm(&expression->builtin_constant);
2905         case EXPR_BUILTIN_PREFETCH:
2906                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2907         case EXPR_OFFSETOF:
2908                 return offsetof_to_firm(&expression->offsetofe);
2909         case EXPR_COMPOUND_LITERAL:
2910                 return compound_literal_to_firm(&expression->compound_literal);
2911
2912         case EXPR_UNKNOWN:
2913         case EXPR_INVALID:
2914                 break;
2915         }
2916         panic("invalid expression found");
2917 }
2918
2919 static bool produces_mode_b(const expression_t *expression)
2920 {
2921         switch (expression->kind) {
2922         case EXPR_BINARY_EQUAL:
2923         case EXPR_BINARY_NOTEQUAL:
2924         case EXPR_BINARY_LESS:
2925         case EXPR_BINARY_LESSEQUAL:
2926         case EXPR_BINARY_GREATER:
2927         case EXPR_BINARY_GREATEREQUAL:
2928         case EXPR_BINARY_ISGREATER:
2929         case EXPR_BINARY_ISGREATEREQUAL:
2930         case EXPR_BINARY_ISLESS:
2931         case EXPR_BINARY_ISLESSEQUAL:
2932         case EXPR_BINARY_ISLESSGREATER:
2933         case EXPR_BINARY_ISUNORDERED:
2934         case EXPR_UNARY_NOT:
2935                 return true;
2936
2937         case EXPR_BINARY_BUILTIN_EXPECT:
2938                 return produces_mode_b(expression->binary.left);
2939
2940         default:
2941                 return false;
2942         }
2943 }
2944
2945 static ir_node *expression_to_firm(const expression_t *expression)
2946 {
2947         if (!produces_mode_b(expression)) {
2948                 ir_node *res = _expression_to_firm(expression);
2949                 assert(res == NULL || get_irn_mode(res) != mode_b);
2950                 return res;
2951         }
2952
2953         if (is_constant_expression(expression)) {
2954                 ir_node *res  = _expression_to_firm(expression);
2955                 ir_mode *mode = get_ir_mode(expression->base.type);
2956                 assert(is_Const(res));
2957                 if (is_Const_null(res)) {
2958                         return new_Const_long(mode, 0);
2959                 } else {
2960                         return new_Const_long(mode, 1);
2961                 }
2962         }
2963
2964         /* we have to produce a 0/1 from the mode_b expression */
2965         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2966         return produce_condition_result(expression, dbgi);
2967 }
2968
2969 static ir_node *expression_to_modeb(const expression_t *expression)
2970 {
2971         ir_node *res = _expression_to_firm(expression);
2972         res          = create_conv(NULL, res, mode_b);
2973
2974         return res;
2975 }
2976
2977 /**
2978  * create a short-circuit expression evaluation that tries to construct
2979  * efficient control flow structures for &&, || and ! expressions
2980  */
2981 static void create_condition_evaluation(const expression_t *expression,
2982                                         ir_node *true_block,
2983                                         ir_node *false_block)
2984 {
2985         switch(expression->kind) {
2986         case EXPR_UNARY_NOT: {
2987                 const unary_expression_t *unary_expression = &expression->unary;
2988                 create_condition_evaluation(unary_expression->value, false_block,
2989                                             true_block);
2990                 return;
2991         }
2992         case EXPR_BINARY_LOGICAL_AND: {
2993                 const binary_expression_t *binary_expression = &expression->binary;
2994
2995                 ir_node *cur_block   = get_cur_block();
2996                 ir_node *extra_block = new_immBlock();
2997                 set_cur_block(cur_block);
2998                 create_condition_evaluation(binary_expression->left, extra_block,
2999                                             false_block);
3000                 mature_immBlock(extra_block);
3001                 set_cur_block(extra_block);
3002                 create_condition_evaluation(binary_expression->right, true_block,
3003                                             false_block);
3004                 return;
3005         }
3006         case EXPR_BINARY_LOGICAL_OR: {
3007                 const binary_expression_t *binary_expression = &expression->binary;
3008
3009                 ir_node *cur_block   = get_cur_block();
3010                 ir_node *extra_block = new_immBlock();
3011                 set_cur_block(cur_block);
3012                 create_condition_evaluation(binary_expression->left, true_block,
3013                                             extra_block);
3014                 mature_immBlock(extra_block);
3015                 set_cur_block(extra_block);
3016                 create_condition_evaluation(binary_expression->right, true_block,
3017                                             false_block);
3018                 return;
3019         }
3020         default:
3021                 break;
3022         }
3023
3024         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3025         ir_node  *condition  = expression_to_modeb(expression);
3026         ir_node  *cond       = new_d_Cond(dbgi, condition);
3027         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3028         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3029
3030         /* set branch prediction info based on __builtin_expect */
3031         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3032                 long               cnst = fold_constant(expression->binary.right);
3033                 cond_jmp_predicate pred;
3034
3035                 if(cnst == 0) {
3036                         pred = COND_JMP_PRED_FALSE;
3037                 } else {
3038                         pred = COND_JMP_PRED_TRUE;
3039                 }
3040                 set_Cond_jmp_pred(cond, pred);
3041         }
3042
3043         add_immBlock_pred(true_block, true_proj);
3044         add_immBlock_pred(false_block, false_proj);
3045
3046         set_cur_block(NULL);
3047 }
3048
3049
3050
3051 static void create_declaration_entity(declaration_t *declaration,
3052                                       declaration_kind_t declaration_kind,
3053                                       ir_type *parent_type)
3054 {
3055         ident     *const id     = new_id_from_str(declaration->symbol->string);
3056         type_t    *const type   = skip_typeref(declaration->type);
3057         ir_type   *const irtype = get_ir_type(type);
3058         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3059         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3060
3061         declaration->declaration_kind = (unsigned char) declaration_kind;
3062         declaration->v.entity         = entity;
3063         set_entity_variability(entity, variability_uninitialized);
3064         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3065         if(parent_type == get_tls_type())
3066                 set_entity_allocation(entity, allocation_automatic);
3067         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3068                 set_entity_allocation(entity, allocation_static);
3069
3070         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3071                 set_entity_volatility(entity, volatility_is_volatile);
3072         }
3073 }
3074
3075
3076 typedef struct type_path_entry_t type_path_entry_t;
3077 struct type_path_entry_t {
3078         type_t           *type;
3079         ir_initializer_t *initializer;
3080         size_t            index;
3081         declaration_t    *compound_entry;
3082 };
3083
3084 typedef struct type_path_t type_path_t;
3085 struct type_path_t {
3086         type_path_entry_t *path;
3087         type_t            *top_type;
3088         bool               invalid;
3089 };
3090
3091 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3092 {
3093         size_t len = ARR_LEN(path->path);
3094
3095         for(size_t i = 0; i < len; ++i) {
3096                 const type_path_entry_t *entry = & path->path[i];
3097
3098                 type_t *type = skip_typeref(entry->type);
3099                 if(is_type_compound(type)) {
3100                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3101                 } else if(is_type_array(type)) {
3102                         fprintf(stderr, "[%zd]", entry->index);
3103                 } else {
3104                         fprintf(stderr, "-INVALID-");
3105                 }
3106         }
3107         fprintf(stderr, "  (");
3108         print_type(path->top_type);
3109         fprintf(stderr, ")");
3110 }
3111
3112 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3113 {
3114         size_t len = ARR_LEN(path->path);
3115         assert(len > 0);
3116         return & path->path[len-1];
3117 }
3118
3119 static type_path_entry_t *append_to_type_path(type_path_t *path)
3120 {
3121         size_t len = ARR_LEN(path->path);
3122         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3123
3124         type_path_entry_t *result = & path->path[len];
3125         memset(result, 0, sizeof(result[0]));
3126         return result;
3127 }
3128
3129 static size_t get_compound_size(const compound_type_t *type)
3130 {
3131         declaration_t *declaration = type->declaration;
3132         declaration_t *member      = declaration->scope.declarations;
3133         size_t         size        = 0;
3134         for( ; member != NULL; member = member->next) {
3135                 ++size;
3136         }
3137         /* TODO: cache results? */
3138
3139         return size;
3140 }
3141
3142 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3143 {
3144         type_t *orig_top_type = path->top_type;
3145         type_t *top_type      = skip_typeref(orig_top_type);
3146
3147         assert(is_type_compound(top_type) || is_type_array(top_type));
3148
3149         if(ARR_LEN(path->path) == 0) {
3150                 return NULL;
3151         } else {
3152                 type_path_entry_t *top         = get_type_path_top(path);
3153                 ir_initializer_t  *initializer = top->initializer;
3154                 return get_initializer_compound_value(initializer, top->index);
3155         }
3156 }
3157
3158 static void descend_into_subtype(type_path_t *path)
3159 {
3160         type_t *orig_top_type = path->top_type;
3161         type_t *top_type      = skip_typeref(orig_top_type);
3162
3163         assert(is_type_compound(top_type) || is_type_array(top_type));
3164
3165         ir_initializer_t *initializer = get_initializer_entry(path);
3166
3167         type_path_entry_t *top = append_to_type_path(path);
3168         top->type              = top_type;
3169
3170         size_t len;
3171
3172         if(is_type_compound(top_type)) {
3173                 declaration_t *declaration = top_type->compound.declaration;
3174                 declaration_t *entry       = declaration->scope.declarations;
3175
3176                 top->compound_entry = entry;
3177                 top->index          = 0;
3178                 len                 = get_compound_size(&top_type->compound);
3179                 if(entry != NULL)
3180                         path->top_type = entry->type;
3181         } else {
3182                 assert(is_type_array(top_type));
3183                 assert(top_type->array.size > 0);
3184
3185                 top->index     = 0;
3186                 path->top_type = top_type->array.element_type;
3187                 len            = top_type->array.size;
3188         }
3189         if(initializer == NULL
3190                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3191                 initializer = create_initializer_compound(len);
3192                 /* we have to set the entry at the 2nd latest path entry... */
3193                 size_t path_len = ARR_LEN(path->path);
3194                 assert(path_len >= 1);
3195                 if(path_len > 1) {
3196                         type_path_entry_t *entry        = & path->path[path_len-2];
3197                         ir_initializer_t  *tinitializer = entry->initializer;
3198                         set_initializer_compound_value(tinitializer, entry->index,
3199                                                        initializer);
3200                 }
3201         }
3202         top->initializer = initializer;
3203 }
3204
3205 static void ascend_from_subtype(type_path_t *path)
3206 {
3207         type_path_entry_t *top = get_type_path_top(path);
3208
3209         path->top_type = top->type;
3210
3211         size_t len = ARR_LEN(path->path);
3212         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3213 }
3214
3215 static void walk_designator(type_path_t *path, const designator_t *designator)
3216 {
3217         /* designators start at current object type */
3218         ARR_RESIZE(type_path_entry_t, path->path, 1);
3219
3220         for( ; designator != NULL; designator = designator->next) {
3221                 type_path_entry_t *top         = get_type_path_top(path);
3222                 type_t            *orig_type   = top->type;
3223                 type_t            *type        = skip_typeref(orig_type);
3224
3225                 if(designator->symbol != NULL) {
3226                         assert(is_type_compound(type));
3227                         size_t    index  = 0;
3228                         symbol_t *symbol = designator->symbol;
3229
3230                         declaration_t *declaration = type->compound.declaration;
3231                         declaration_t *iter        = declaration->scope.declarations;
3232                         for( ; iter != NULL; iter = iter->next, ++index) {
3233                                 if(iter->symbol == symbol) {
3234                                         break;
3235                                 }
3236                         }
3237                         assert(iter != NULL);
3238
3239                         top->type           = orig_type;
3240                         top->compound_entry = iter;
3241                         top->index          = index;
3242                         orig_type           = iter->type;
3243                 } else {
3244                         expression_t *array_index = designator->array_index;
3245                         assert(designator->array_index != NULL);
3246                         assert(is_type_array(type));
3247                         assert(is_type_valid(array_index->base.type));
3248
3249                         long index = fold_constant(array_index);
3250                         assert(index >= 0);
3251 #ifndef NDEBUG
3252                         if(type->array.size_constant == 1) {
3253                                 long array_size = type->array.size;
3254                                 assert(index < array_size);
3255                         }
3256 #endif
3257
3258                         top->type  = orig_type;
3259                         top->index = (size_t) index;
3260                         orig_type  = type->array.element_type;
3261                 }
3262                 path->top_type = orig_type;
3263
3264                 if(designator->next != NULL) {
3265                         descend_into_subtype(path);
3266                 }
3267         }
3268
3269         path->invalid  = false;
3270 }
3271
3272 static void advance_current_object(type_path_t *path)
3273 {
3274         if(path->invalid) {
3275                 /* TODO: handle this... */
3276                 panic("invalid initializer in ast2firm (excessive elements)");
3277                 return;
3278         }
3279
3280         type_path_entry_t *top = get_type_path_top(path);
3281
3282         type_t *type = skip_typeref(top->type);
3283         if(is_type_union(type)) {
3284                 top->compound_entry = NULL;
3285         } else if(is_type_struct(type)) {
3286                 declaration_t *entry = top->compound_entry;
3287
3288                 top->index++;
3289                 entry               = entry->next;
3290                 top->compound_entry = entry;
3291                 if(entry != NULL) {
3292                         path->top_type = entry->type;
3293                         return;
3294                 }
3295         } else {
3296                 assert(is_type_array(type));
3297
3298                 top->index++;
3299                 if(!type->array.size_constant || top->index < type->array.size) {
3300                         return;
3301                 }
3302         }
3303
3304         /* we're past the last member of the current sub-aggregate, try if we
3305          * can ascend in the type hierarchy and continue with another subobject */
3306         size_t len = ARR_LEN(path->path);
3307
3308         if(len > 1) {
3309                 ascend_from_subtype(path);
3310                 advance_current_object(path);
3311         } else {
3312                 path->invalid = true;
3313         }
3314 }
3315
3316
3317 static ir_initializer_t *create_ir_initializer(
3318                 const initializer_t *initializer, type_t *type);
3319
3320 static ir_initializer_t *create_ir_initializer_value(
3321                 const initializer_value_t *initializer)
3322 {
3323         if (is_type_compound(initializer->value->base.type)) {
3324                 panic("initializer creation for compounds not implemented yet");
3325         }
3326         ir_node *value = expression_to_firm(initializer->value);
3327         return create_initializer_const(value);
3328 }
3329
3330 static ir_initializer_t *create_ir_initializer_list(
3331                 const initializer_list_t *initializer, type_t *type)
3332 {
3333         type_path_t path;
3334         memset(&path, 0, sizeof(path));
3335         path.top_type = type;
3336         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3337
3338         descend_into_subtype(&path);
3339
3340         for(size_t i = 0; i < initializer->len; ++i) {
3341                 const initializer_t *sub_initializer = initializer->initializers[i];
3342
3343                 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3344                         walk_designator(&path, sub_initializer->designator.designator);
3345                         continue;
3346                 }
3347
3348                 if(sub_initializer->kind == INITIALIZER_VALUE) {
3349                         /* we might have to descend into types until we're at a scalar
3350                          * type */
3351                         while(true) {
3352                                 type_t *orig_top_type = path.top_type;
3353                                 type_t *top_type      = skip_typeref(orig_top_type);
3354
3355                                 if(is_type_scalar(top_type))
3356                                         break;
3357                                 descend_into_subtype(&path);
3358                         }
3359                 }
3360
3361                 ir_initializer_t *sub_irinitializer
3362                         = create_ir_initializer(sub_initializer, path.top_type);
3363
3364                 size_t path_len = ARR_LEN(path.path);
3365                 assert(path_len >= 1);
3366                 type_path_entry_t *entry        = & path.path[path_len-1];
3367                 ir_initializer_t  *tinitializer = entry->initializer;
3368                 set_initializer_compound_value(tinitializer, entry->index,
3369                                                sub_irinitializer);
3370
3371                 advance_current_object(&path);
3372         }
3373
3374         assert(ARR_LEN(path.path) >= 1);
3375         ir_initializer_t *result = path.path[0].initializer;
3376         DEL_ARR_F(path.path);
3377
3378         return result;
3379 }
3380
3381 static ir_initializer_t *create_ir_initializer_string(
3382                 const initializer_string_t *initializer, type_t *type)
3383 {
3384         type = skip_typeref(type);
3385
3386         size_t            string_len    = initializer->string.size;
3387         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3388         size_t            len           = type->array.size;
3389         ir_initializer_t *irinitializer = create_initializer_compound(len);
3390
3391         const char *string = initializer->string.begin;
3392         ir_mode    *mode   = get_type_mode(ir_type_const_char);
3393
3394         for(size_t i = 0; i < len; ++i) {
3395                 char c = 0;
3396                 if(i < string_len)
3397                         c = string[i];
3398
3399                 tarval           *tv = new_tarval_from_long(c, mode);
3400                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3401
3402                 set_initializer_compound_value(irinitializer, i, char_initializer);
3403         }
3404
3405         return irinitializer;
3406 }
3407
3408 static ir_initializer_t *create_ir_initializer_wide_string(
3409                 const initializer_wide_string_t *initializer, type_t *type)
3410 {
3411         size_t            string_len    = initializer->string.size;
3412         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3413         size_t            len           = type->array.size;
3414         ir_initializer_t *irinitializer = create_initializer_compound(len);
3415
3416         const wchar_rep_t *string = initializer->string.begin;
3417         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3418
3419         for(size_t i = 0; i < len; ++i) {
3420                 wchar_rep_t c = 0;
3421                 if(i < string_len) {
3422                         c = string[i];
3423                 }
3424                 tarval *tv = new_tarval_from_long(c, mode);
3425                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3426
3427                 set_initializer_compound_value(irinitializer, i, char_initializer);
3428         }
3429
3430         return irinitializer;
3431 }
3432
3433 static ir_initializer_t *create_ir_initializer(
3434                 const initializer_t *initializer, type_t *type)
3435 {
3436         switch(initializer->kind) {
3437                 case INITIALIZER_STRING:
3438                         return create_ir_initializer_string(&initializer->string, type);
3439
3440                 case INITIALIZER_WIDE_STRING:
3441                         return create_ir_initializer_wide_string(&initializer->wide_string,
3442                                                                  type);
3443
3444                 case INITIALIZER_LIST:
3445                         return create_ir_initializer_list(&initializer->list, type);
3446
3447                 case INITIALIZER_VALUE:
3448                         return create_ir_initializer_value(&initializer->value);
3449
3450                 case INITIALIZER_DESIGNATOR:
3451                         panic("unexpected designator initializer found");
3452         }
3453         panic("unknown initializer");
3454 }
3455
3456 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3457                 ir_node *base_addr)
3458 {
3459         if (is_atomic_type(type)) {
3460                 ir_mode *mode = get_type_mode(type);
3461                 tarval  *zero = get_mode_null(mode);
3462                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3463
3464                 /* TODO: bitfields */
3465                 ir_node *mem    = get_store();
3466                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3467                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3468                 set_store(proj_m);
3469         } else {
3470                 assert(is_compound_type(type));
3471
3472                 int n_members;
3473                 if(is_Array_type(type)) {
3474                         assert(has_array_upper_bound(type, 0));
3475                         n_members = get_array_upper_bound_int(type, 0);
3476                 } else {
3477                         n_members = get_compound_n_members(type);
3478                 }
3479
3480                 for(int i = 0; i < n_members; ++i) {
3481                         ir_node *addr;
3482                         ir_type *irtype;
3483                         if(is_Array_type(type)) {
3484                                 ir_entity *entity   = get_array_element_entity(type);
3485                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3486                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3487                                 ir_node   *in[1]    = { cnst };
3488                                 irtype = get_array_element_type(type);
3489                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3490                         } else {
3491                                 ir_entity *member = get_compound_member(type, i);
3492
3493                                 irtype = get_entity_type(member);
3494                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3495                         }
3496
3497                         create_dynamic_null_initializer(irtype, dbgi, addr);
3498                 }
3499         }
3500 }
3501
3502 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3503                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3504 {
3505         switch(get_initializer_kind(initializer)) {
3506         case IR_INITIALIZER_NULL: {
3507                 create_dynamic_null_initializer(type, dbgi, base_addr);
3508                 return;
3509         }
3510         case IR_INITIALIZER_CONST: {
3511                 ir_node *node = get_initializer_const_value(initializer);
3512                 ir_mode *mode = get_irn_mode(node);
3513                 assert(get_type_mode(type) == mode);
3514
3515                 /* TODO: bitfields... */
3516                 ir_node *mem    = get_store();
3517                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3518                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3519                 set_store(proj_m);
3520                 return;
3521         }
3522         case IR_INITIALIZER_TARVAL: {
3523                 tarval  *tv   = get_initializer_tarval_value(initializer);
3524                 ir_mode *mode = get_tarval_mode(tv);
3525                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3526                 assert(get_type_mode(type) == mode);
3527
3528                 /* TODO: bitfields... */
3529                 ir_node *mem    = get_store();
3530                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3531                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3532                 set_store(proj_m);
3533                 return;
3534         }
3535         case IR_INITIALIZER_COMPOUND: {
3536                 assert(is_compound_type(type));
3537                 int n_members;
3538                 if(is_Array_type(type)) {
3539                         assert(has_array_upper_bound(type, 0));
3540                         n_members = get_array_upper_bound_int(type, 0);
3541                 } else {
3542                         n_members = get_compound_n_members(type);
3543                 }
3544
3545                 if(get_initializer_compound_n_entries(initializer)
3546                                 != (unsigned) n_members)
3547                         panic("initializer doesn't match compound type");
3548
3549                 for(int i = 0; i < n_members; ++i) {
3550                         ir_node *addr;
3551                         ir_type *irtype;
3552                         if(is_Array_type(type)) {
3553                                 ir_entity *entity   = get_array_element_entity(type);
3554                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3555                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3556                                 ir_node   *in[1]    = { cnst };
3557                                 irtype = get_array_element_type(type);
3558                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3559                         } else {
3560                                 ir_entity *member = get_compound_member(type, i);
3561
3562                                 irtype = get_entity_type(member);
3563                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3564                         }
3565
3566                         ir_initializer_t *sub_init
3567                                 = get_initializer_compound_value(initializer, i);
3568
3569                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3570                 }
3571                 return;
3572         }
3573         }
3574
3575         panic("invalid IR_INITIALIZER found");
3576 }
3577
3578 static void create_dynamic_initializer(ir_initializer_t *initializer,
3579                 dbg_info *dbgi, ir_entity *entity)
3580 {
3581         ir_node *frame     = get_local_frame(entity);
3582         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3583         ir_type *type      = get_entity_type(entity);
3584
3585         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3586 }
3587
3588 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3589                                      ir_entity *entity, type_t *type)
3590 {
3591         ir_node *memory = get_store();
3592         ir_node *nomem  = new_NoMem();
3593         ir_node *frame  = get_irg_frame(current_ir_graph);
3594         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3595
3596         if(initializer->kind == INITIALIZER_VALUE) {
3597                 initializer_value_t *initializer_value = &initializer->value;
3598
3599                 ir_node *value = expression_to_firm(initializer_value->value);
3600                 type = skip_typeref(type);
3601                 assign_value(dbgi, addr, type, value);
3602                 return;
3603         }
3604
3605         if(!is_constant_initializer(initializer)) {
3606                 ir_initializer_t *irinitializer
3607                         = create_ir_initializer(initializer, type);
3608
3609                 create_dynamic_initializer(irinitializer, dbgi, entity);
3610                 return;
3611         }
3612
3613         /* create the ir_initializer */
3614         ir_graph *const old_current_ir_graph = current_ir_graph;
3615         current_ir_graph = get_const_code_irg();
3616
3617         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3618
3619         assert(current_ir_graph == get_const_code_irg());
3620         current_ir_graph = old_current_ir_graph;
3621
3622         /* create a "template" entity which is copied to the entity on the stack */
3623         ident     *const id          = id_unique("initializer.%u");
3624         ir_type   *const irtype      = get_ir_type(type);
3625         ir_type   *const global_type = get_glob_type();
3626         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3627         set_entity_ld_ident(init_entity, id);
3628
3629         set_entity_variability(init_entity, variability_initialized);
3630         set_entity_visibility(init_entity, visibility_local);
3631         set_entity_allocation(init_entity, allocation_static);
3632
3633         set_entity_initializer(init_entity, irinitializer);
3634
3635         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3636         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3637
3638         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3639         set_store(copyb_mem);
3640 }
3641
3642 static void create_initializer_local_variable_entity(declaration_t *declaration)
3643 {
3644         initializer_t *initializer = declaration->init.initializer;
3645         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3646         ir_entity     *entity      = declaration->v.entity;
3647         type_t        *type        = declaration->type;
3648         create_local_initializer(initializer, dbgi, entity, type);
3649 }
3650
3651 static void create_declaration_initializer(declaration_t *declaration)
3652 {
3653         initializer_t *initializer = declaration->init.initializer;
3654         if(initializer == NULL)
3655                 return;
3656
3657         declaration_kind_t declaration_kind
3658                 = (declaration_kind_t) declaration->declaration_kind;
3659         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3660                 create_initializer_local_variable_entity(declaration);
3661                 return;
3662         }
3663
3664         if(initializer->kind == INITIALIZER_VALUE) {
3665                 initializer_value_t *initializer_value = &initializer->value;
3666                 dbg_info            *dbgi
3667                         = get_dbg_info(&declaration->source_position);
3668
3669                 ir_node *value = expression_to_firm(initializer_value->value);
3670                 value = do_strict_conv(dbgi, value);
3671
3672                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3673                         set_value(declaration->v.value_number, value);
3674                 } else {
3675                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3676
3677                         ir_entity *entity = declaration->v.entity;
3678
3679                         set_entity_variability(entity, variability_initialized);
3680                         set_atomic_ent_value(entity, value);
3681                 }
3682         } else {
3683                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3684                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3685
3686                 ir_entity        *entity        = declaration->v.entity;
3687                 ir_initializer_t *irinitializer
3688                         = create_ir_initializer(initializer, declaration->type);
3689
3690                 set_entity_variability(entity, variability_initialized);
3691                 set_entity_initializer(entity, irinitializer);
3692         }
3693 }
3694
3695 static void create_variable_length_array(declaration_t *declaration)
3696 {
3697         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3698         type_t   *type      = declaration->type;
3699         ir_node  *mem       = get_store();
3700         ir_type  *el_type   = get_ir_type(type->array.element_type);
3701
3702         /* make sure size_node is calculated */
3703         get_type_size(type);
3704         ir_node  *elems = type->array.size_node;
3705         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3706
3707         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3708         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3709         set_store(proj_m);
3710
3711         /* initializers are not allowed for VLAs */
3712         assert(declaration->init.initializer == NULL);
3713
3714         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3715         declaration->v.vla_base       = addr;
3716
3717         /* TODO: record VLA somewhere so we create the free node when we leave
3718          * it's scope */
3719 }
3720
3721 /**
3722  * Creates a Firm local variable from a declaration.
3723  */
3724 static void create_local_variable(declaration_t *declaration)
3725 {
3726         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3727
3728         bool needs_entity = declaration->address_taken;
3729         type_t *type = skip_typeref(declaration->type);
3730
3731         /* is it a variable length array? */
3732         if(is_type_array(type) && !type->array.size_constant) {
3733                 create_variable_length_array(declaration);
3734                 return;
3735         } else if(is_type_array(type) || is_type_compound(type)) {
3736                 needs_entity = true;
3737         } else if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3738                 needs_entity = true;
3739         }
3740
3741         if(needs_entity) {
3742                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3743                 create_declaration_entity(declaration,
3744                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3745                                           frame_type);
3746         } else {
3747                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3748                 declaration->v.value_number   = next_value_number_function;
3749                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3750                 ++next_value_number_function;
3751         }
3752 }
3753
3754 static void create_local_static_variable(declaration_t *declaration)
3755 {
3756         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3757
3758         type_t    *const type        = skip_typeref(declaration->type);
3759         ir_type   *const global_type = get_glob_type();
3760         ir_type   *const irtype      = get_ir_type(type);
3761         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3762
3763         size_t l = strlen(declaration->symbol->string);
3764         char   buf[l + sizeof(".%u")];
3765         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3766         ident     *const id = id_unique(buf);
3767
3768         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3769
3770         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3771                 set_entity_volatility(entity, volatility_is_volatile);
3772         }
3773
3774         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3775         declaration->v.entity         = entity;
3776         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3777         set_entity_variability(entity, variability_uninitialized);
3778         set_entity_visibility(entity, visibility_local);
3779         set_entity_allocation(entity, allocation_static);
3780
3781         ir_graph *const old_current_ir_graph = current_ir_graph;
3782         current_ir_graph = get_const_code_irg();
3783
3784         create_declaration_initializer(declaration);
3785
3786         assert(current_ir_graph == get_const_code_irg());
3787         current_ir_graph = old_current_ir_graph;
3788 }
3789
3790
3791
3792 static void return_statement_to_firm(return_statement_t *statement)
3793 {
3794         if(get_cur_block() == NULL)
3795                 return;
3796
3797         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3798         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3799
3800
3801         ir_node *in[1];
3802         int      in_len;
3803         if(get_method_n_ress(func_irtype) > 0) {
3804                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3805
3806                 if(statement->value != NULL) {
3807                         ir_node *node = expression_to_firm(statement->value);
3808                         node  = do_strict_conv(dbgi, node);
3809                         in[0] = node;
3810                 } else {
3811                         ir_mode *mode;
3812                         if(is_compound_type(res_type)) {
3813                                 mode = mode_P_data;
3814                         } else {
3815                                 mode = get_type_mode(res_type);
3816                         }
3817                         in[0] = new_Unknown(mode);
3818                 }
3819                 in_len = 1;
3820         } else {
3821                 /* build return_value for its side effects */
3822                 if(statement->value != NULL) {
3823                         expression_to_firm(statement->value);
3824                 }
3825                 in_len = 0;
3826         }
3827
3828         ir_node  *store = get_store();
3829         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3830
3831         ir_node *end_block = get_irg_end_block(current_ir_graph);
3832         add_immBlock_pred(end_block, ret);
3833
3834         set_cur_block(NULL);
3835 }
3836
3837 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3838 {
3839         if(get_cur_block() == NULL)
3840                 return NULL;
3841
3842         return expression_to_firm(statement->expression);
3843 }
3844
3845 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3846 {
3847         declaration_t *declaration = compound->scope.declarations;
3848         for( ; declaration != NULL; declaration = declaration->next) {
3849                 create_local_declaration(declaration);
3850         }
3851
3852         ir_node     *result    = NULL;
3853         statement_t *statement = compound->statements;
3854         for( ; statement != NULL; statement = statement->base.next) {
3855                 if(statement->base.next == NULL
3856                                 && statement->kind == STATEMENT_EXPRESSION) {
3857                         result = expression_statement_to_firm(
3858                                         &statement->expression);
3859                         break;
3860                 }
3861                 statement_to_firm(statement);
3862         }
3863
3864         return result;
3865 }
3866
3867 static void create_global_variable(declaration_t *declaration)
3868 {
3869         ir_visibility  vis;
3870         ir_type       *var_type;
3871         switch ((storage_class_tag_t)declaration->storage_class) {
3872                 case STORAGE_CLASS_STATIC:
3873                         vis = visibility_local;
3874                         goto global_var;
3875
3876                 case STORAGE_CLASS_EXTERN:
3877                         vis = visibility_external_allocated;
3878                         goto global_var;
3879
3880                 case STORAGE_CLASS_NONE:
3881                         vis = visibility_external_visible;
3882                         goto global_var;
3883
3884                 case STORAGE_CLASS_THREAD:
3885                         vis = visibility_external_visible;
3886                         goto tls_var;
3887
3888                 case STORAGE_CLASS_THREAD_EXTERN:
3889                         vis = visibility_external_allocated;
3890                         goto tls_var;
3891
3892                 case STORAGE_CLASS_THREAD_STATIC:
3893                         vis = visibility_local;
3894                         goto tls_var;
3895
3896 tls_var:
3897                         var_type = get_tls_type();
3898                         goto create_var;
3899
3900 global_var:
3901                         var_type = get_glob_type();
3902                         goto create_var;
3903
3904 create_var:
3905                         create_declaration_entity(declaration,
3906                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3907                                                   var_type);
3908                         set_entity_visibility(declaration->v.entity, vis);
3909
3910                         return;
3911
3912                 case STORAGE_CLASS_TYPEDEF:
3913                 case STORAGE_CLASS_AUTO:
3914                 case STORAGE_CLASS_REGISTER:
3915                 case STORAGE_CLASS_ENUM_ENTRY:
3916                         break;
3917         }
3918         panic("Invalid storage class for global variable");
3919 }
3920
3921 static void create_local_declaration(declaration_t *declaration)
3922 {
3923         if (declaration->namespc != NAMESPACE_NORMAL)
3924                 return;
3925         /* construct type */
3926         (void) get_ir_type(declaration->type);
3927         if (declaration->symbol == NULL) {
3928                 return;
3929         }
3930
3931         type_t *type = skip_typeref(declaration->type);
3932
3933         switch ((storage_class_tag_t) declaration->storage_class) {
3934         case STORAGE_CLASS_STATIC:
3935                 create_local_static_variable(declaration);
3936                 return;
3937         case STORAGE_CLASS_EXTERN:
3938                 create_global_variable(declaration);
3939                 create_declaration_initializer(declaration);
3940                 return;
3941         case STORAGE_CLASS_NONE:
3942         case STORAGE_CLASS_AUTO:
3943         case STORAGE_CLASS_REGISTER:
3944                 if(is_type_function(type)) {
3945                         if(declaration->init.statement != NULL) {
3946                                 panic("nested functions not supported yet");
3947                         } else {
3948                                 get_function_entity(declaration);
3949                         }
3950                 } else {
3951                         create_local_variable(declaration);
3952                 }
3953                 return;
3954         case STORAGE_CLASS_ENUM_ENTRY:
3955                 /* should already be handled */
3956                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
3957                 return;
3958         case STORAGE_CLASS_TYPEDEF:
3959                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
3960                 return;
3961         case STORAGE_CLASS_THREAD:
3962         case STORAGE_CLASS_THREAD_EXTERN:
3963         case STORAGE_CLASS_THREAD_STATIC:
3964                 break;
3965         }
3966         panic("invalid storage class found");
3967 }
3968
3969 static void initialize_local_declaration(declaration_t *declaration)
3970 {
3971         if(declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
3972                 return;
3973
3974         switch ((declaration_kind_t) declaration->declaration_kind) {
3975         case DECLARATION_KIND_LOCAL_VARIABLE:
3976         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
3977                 create_declaration_initializer(declaration);
3978                 return;
3979
3980         case DECLARATION_KIND_LABEL_BLOCK:
3981         case DECLARATION_KIND_COMPOUND_MEMBER:
3982         case DECLARATION_KIND_GLOBAL_VARIABLE:
3983         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
3984         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
3985         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
3986         case DECLARATION_KIND_FUNCTION:
3987         case DECLARATION_KIND_TYPE:
3988         case DECLARATION_KIND_ENUM_ENTRY:
3989                 return;
3990
3991         case DECLARATION_KIND_UNKNOWN:
3992                 panic("can't initialize unknwon declaration");
3993         }
3994         panic("invalid declaration kind");
3995 }
3996
3997 static void declaration_statement_to_firm(declaration_statement_t *statement)
3998 {
3999         declaration_t *declaration = statement->declarations_begin;
4000         declaration_t *end         = statement->declarations_end->next;
4001         for( ; declaration != end; declaration = declaration->next) {
4002                 if(declaration->namespc != NAMESPACE_NORMAL)
4003                         continue;
4004                 initialize_local_declaration(declaration);
4005         }
4006 }
4007
4008 static void if_statement_to_firm(if_statement_t *statement)
4009 {
4010         ir_node *cur_block = get_cur_block();
4011
4012         ir_node *fallthrough_block = NULL;
4013
4014         /* the true (blocks) */
4015         ir_node *true_block = NULL;
4016         if (statement->true_statement != NULL) {
4017                 true_block = new_immBlock();
4018                 statement_to_firm(statement->true_statement);
4019                 if (get_cur_block() != NULL) {
4020                         ir_node *jmp = new_Jmp();
4021                         if (fallthrough_block == NULL)
4022                                 fallthrough_block = new_immBlock();
4023                         add_immBlock_pred(fallthrough_block, jmp);
4024                 }
4025         }
4026
4027         /* the false (blocks) */
4028         ir_node *false_block = NULL;
4029         if (statement->false_statement != NULL) {
4030                 false_block = new_immBlock();
4031
4032                 statement_to_firm(statement->false_statement);
4033                 if (get_cur_block() != NULL) {
4034                         ir_node *jmp = new_Jmp();
4035                         if (fallthrough_block == NULL)
4036                                 fallthrough_block = new_immBlock();
4037                         add_immBlock_pred(fallthrough_block, jmp);
4038                 }
4039         }
4040
4041         /* create the condition */
4042         if (cur_block != NULL) {
4043                 if (true_block == NULL || false_block == NULL) {
4044                         if (fallthrough_block == NULL)
4045                                 fallthrough_block = new_immBlock();
4046                         if (true_block == NULL)
4047                                 true_block = fallthrough_block;
4048                         if (false_block == NULL)
4049                                 false_block = fallthrough_block;
4050                 }
4051
4052                 set_cur_block(cur_block);
4053                 create_condition_evaluation(statement->condition, true_block,
4054                                             false_block);
4055         }
4056
4057         mature_immBlock(true_block);
4058         if (false_block != fallthrough_block) {
4059                 mature_immBlock(false_block);
4060         }
4061         if (fallthrough_block != NULL) {
4062                 mature_immBlock(fallthrough_block);
4063         }
4064
4065         set_cur_block(fallthrough_block);
4066 }
4067
4068 static void while_statement_to_firm(while_statement_t *statement)
4069 {
4070         ir_node *jmp = NULL;
4071         if(get_cur_block() != NULL) {
4072                 jmp = new_Jmp();
4073         }
4074
4075         /* create the header block */
4076         ir_node *header_block = new_immBlock();
4077         if(jmp != NULL) {
4078                 add_immBlock_pred(header_block, jmp);
4079         }
4080
4081         /* the false block */
4082         ir_node *false_block = new_immBlock();
4083
4084         /* the loop body */
4085         ir_node *body_block;
4086         if (statement->body != NULL) {
4087                 ir_node *old_continue_label = continue_label;
4088                 ir_node *old_break_label    = break_label;
4089                 continue_label              = header_block;
4090                 break_label                 = false_block;
4091
4092                 body_block = new_immBlock();
4093                 statement_to_firm(statement->body);
4094
4095                 assert(continue_label == header_block);
4096                 assert(break_label    == false_block);
4097                 continue_label = old_continue_label;
4098                 break_label    = old_break_label;
4099
4100                 if(get_cur_block() != NULL) {
4101                         jmp = new_Jmp();
4102                         add_immBlock_pred(header_block, jmp);
4103                 }
4104         } else {
4105                 body_block = header_block;
4106         }
4107
4108         /* create the condition */
4109         set_cur_block(header_block);
4110
4111         create_condition_evaluation(statement->condition, body_block, false_block);
4112         mature_immBlock(body_block);
4113         mature_immBlock(false_block);
4114         mature_immBlock(header_block);
4115
4116         set_cur_block(false_block);
4117 }
4118
4119 static void do_while_statement_to_firm(do_while_statement_t *statement)
4120 {
4121         ir_node *jmp = NULL;
4122         if(get_cur_block() != NULL) {
4123                 jmp = new_Jmp();
4124         }
4125
4126         /* create the header block */
4127         ir_node *header_block = new_immBlock();
4128
4129         /* the false block */
4130         ir_node *false_block = new_immBlock();
4131
4132         /* the loop body */
4133         ir_node *body_block = new_immBlock();
4134         if(jmp != NULL) {
4135                 add_immBlock_pred(body_block, jmp);
4136         }
4137
4138         if (statement->body != NULL) {
4139                 ir_node *old_continue_label = continue_label;
4140                 ir_node *old_break_label    = break_label;
4141                 continue_label              = header_block;
4142                 break_label                 = false_block;
4143
4144                 statement_to_firm(statement->body);
4145
4146                 assert(continue_label == header_block);
4147                 assert(break_label    == false_block);
4148                 continue_label = old_continue_label;
4149                 break_label    = old_break_label;
4150
4151                 if (get_cur_block() == NULL) {
4152                         mature_immBlock(header_block);
4153                         mature_immBlock(body_block);
4154                         mature_immBlock(false_block);
4155                         return;
4156                 }
4157         }
4158
4159         ir_node *body_jmp = new_Jmp();
4160         add_immBlock_pred(header_block, body_jmp);
4161         mature_immBlock(header_block);
4162
4163         /* create the condition */
4164         set_cur_block(header_block);
4165
4166         create_condition_evaluation(statement->condition, body_block, false_block);
4167         mature_immBlock(body_block);
4168         mature_immBlock(false_block);
4169         mature_immBlock(header_block);
4170
4171         set_cur_block(false_block);
4172 }
4173
4174 static void for_statement_to_firm(for_statement_t *statement)
4175 {
4176         ir_node *jmp = NULL;
4177
4178         /* create declarations */
4179         declaration_t *declaration = statement->scope.declarations;
4180         for( ; declaration != NULL; declaration = declaration->next) {
4181                 create_local_declaration(declaration);
4182         }
4183         declaration = statement->scope.declarations;
4184         for( ; declaration != NULL; declaration = declaration->next) {
4185                 initialize_local_declaration(declaration);
4186         }
4187
4188         if (get_cur_block() != NULL) {
4189                 if(statement->initialisation != NULL) {
4190                         expression_to_firm(statement->initialisation);
4191                 }
4192
4193                 jmp = new_Jmp();
4194         }
4195
4196
4197         /* create the step block */
4198         ir_node *const step_block = new_immBlock();
4199         if (statement->step != NULL) {
4200                 expression_to_firm(statement->step);
4201         }
4202         ir_node *const step_jmp = new_Jmp();
4203
4204         /* create the header block */
4205         ir_node *const header_block = new_immBlock();
4206         if (jmp != NULL) {
4207                 add_immBlock_pred(header_block, jmp);
4208         }
4209         add_immBlock_pred(header_block, step_jmp);
4210
4211         /* the false block */
4212         ir_node *const false_block = new_immBlock();
4213
4214         /* the loop body */
4215         ir_node * body_block;
4216         if (statement->body != NULL) {
4217                 ir_node *const old_continue_label = continue_label;
4218                 ir_node *const old_break_label    = break_label;
4219                 continue_label = step_block;
4220                 break_label    = false_block;
4221
4222                 body_block = new_immBlock();
4223                 statement_to_firm(statement->body);
4224
4225                 assert(continue_label == step_block);
4226                 assert(break_label    == false_block);
4227                 continue_label = old_continue_label;
4228                 break_label    = old_break_label;
4229
4230                 if (get_cur_block() != NULL) {
4231                         jmp = new_Jmp();
4232                         add_immBlock_pred(step_block, jmp);
4233                 }
4234         } else {
4235                 body_block = step_block;
4236         }
4237
4238         /* create the condition */
4239         set_cur_block(header_block);
4240         if (statement->condition != NULL) {
4241                 create_condition_evaluation(statement->condition, body_block,
4242                                             false_block);
4243         } else {
4244                 keep_alive(header_block);
4245                 jmp = new_Jmp();
4246                 add_immBlock_pred(body_block, jmp);
4247         }
4248
4249         mature_immBlock(body_block);
4250         mature_immBlock(false_block);
4251         mature_immBlock(step_block);
4252         mature_immBlock(header_block);
4253         mature_immBlock(false_block);
4254
4255         set_cur_block(false_block);
4256 }
4257
4258 static void create_jump_statement(const statement_t *statement,
4259                                   ir_node *target_block)
4260 {
4261         if(get_cur_block() == NULL)
4262                 return;
4263
4264         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4265         ir_node  *jump = new_d_Jmp(dbgi);
4266         add_immBlock_pred(target_block, jump);
4267
4268         set_cur_block(NULL);
4269 }
4270
4271 static ir_node *get_break_label(void)
4272 {
4273         if (break_label == NULL) {
4274                 ir_node *cur_block = get_cur_block();
4275                 break_label = new_immBlock();
4276                 set_cur_block(cur_block);
4277         }
4278         return break_label;
4279 }
4280
4281 static void switch_statement_to_firm(const switch_statement_t *statement)
4282 {
4283         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4284
4285         ir_node *expression  = expression_to_firm(statement->expression);
4286         ir_node *cond        = new_d_Cond(dbgi, expression);
4287
4288         set_cur_block(NULL);
4289
4290         ir_node *const old_switch_cond       = current_switch_cond;
4291         ir_node *const old_break_label       = break_label;
4292         const bool     old_saw_default_label = saw_default_label;
4293         saw_default_label                    = false;
4294         current_switch_cond                  = cond;
4295         break_label                          = NULL;
4296
4297         if (statement->body != NULL) {
4298                 statement_to_firm(statement->body);
4299         }
4300
4301         if (get_cur_block() != NULL) {
4302                 ir_node *jmp = new_Jmp();
4303                 add_immBlock_pred(get_break_label(), jmp);
4304         }
4305
4306         if (!saw_default_label) {
4307                 set_cur_block(get_nodes_block(cond));
4308                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4309                                                         MAGIC_DEFAULT_PN_NUMBER);
4310                 add_immBlock_pred(get_break_label(), proj);
4311         }
4312
4313         if (break_label != NULL) {
4314                 mature_immBlock(break_label);
4315         }
4316         set_cur_block(break_label);
4317
4318         assert(current_switch_cond == cond);
4319         current_switch_cond = old_switch_cond;
4320         break_label         = old_break_label;
4321         saw_default_label   = old_saw_default_label;
4322 }
4323
4324 static void case_label_to_firm(const case_label_statement_t *statement)
4325 {
4326         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4327
4328         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4329
4330         /* let's create a node and hope firm constant folding creates a Const
4331          * node... */
4332         ir_node *proj;
4333         ir_node *old_block = get_nodes_block(current_switch_cond);
4334         ir_node *block     = new_immBlock();
4335
4336         set_cur_block(old_block);
4337         if(statement->expression != NULL) {
4338                 long start_pn = fold_constant(statement->expression);
4339                 long end_pn = start_pn;
4340                 if (statement->end_range != NULL) {
4341                         end_pn = fold_constant(statement->end_range);
4342                 }
4343                 assert(start_pn <= end_pn);
4344                 /* create jumps for all cases in the given range */
4345                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4346                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
4347                                 /* oops someone detected our cheating... */
4348                                 panic("magic default pn used");
4349                         }
4350                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4351                         add_immBlock_pred(block, proj);
4352                 }
4353         } else {
4354                 saw_default_label = true;
4355                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4356                                          MAGIC_DEFAULT_PN_NUMBER);
4357
4358                 add_immBlock_pred(block, proj);
4359         }
4360
4361         if (fallthrough != NULL) {
4362                 add_immBlock_pred(block, fallthrough);
4363         }
4364         mature_immBlock(block);
4365         set_cur_block(block);
4366
4367         if(statement->statement != NULL) {
4368                 statement_to_firm(statement->statement);
4369         }
4370 }
4371
4372 static ir_node *get_label_block(declaration_t *label)
4373 {
4374         assert(label->namespc == NAMESPACE_LABEL);
4375
4376         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4377                 return label->v.block;
4378         }
4379         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4380
4381         ir_node *old_cur_block = get_cur_block();
4382         ir_node *block         = new_immBlock();
4383         set_cur_block(old_cur_block);
4384
4385         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4386         label->v.block          = block;
4387
4388         ARR_APP1(ir_node *, imature_blocks, block);
4389
4390         return block;
4391 }
4392
4393 static void label_to_firm(const label_statement_t *statement)
4394 {
4395         ir_node *block = get_label_block(statement->label);
4396
4397         if(get_cur_block() != NULL) {
4398                 ir_node *jmp = new_Jmp();
4399                 add_immBlock_pred(block, jmp);
4400         }
4401
4402         set_cur_block(block);
4403         keep_alive(block);
4404
4405         if(statement->statement != NULL) {
4406                 statement_to_firm(statement->statement);
4407         }
4408 }
4409
4410 static void goto_to_firm(const goto_statement_t *statement)
4411 {
4412         if(get_cur_block() == NULL)
4413                 return;
4414
4415         ir_node *block = get_label_block(statement->label);
4416         ir_node *jmp   = new_Jmp();
4417         add_immBlock_pred(block, jmp);
4418
4419         set_cur_block(NULL);
4420 }
4421
4422 typedef enum modifier_t {
4423         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
4424         ASM_MODIFIER_READ_WRITE   = 1 << 1,
4425         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
4426         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
4427 } modifier_t;
4428
4429 static void asm_statement_to_firm(const asm_statement_t *statement)
4430 {
4431         (void) statement;
4432         fprintf(stderr, "WARNING asm not implemented yet!\n");
4433 #if 0
4434         bool needs_memory = false;
4435
4436         size_t         n_clobbers = 0;
4437         asm_clobber_t *clobber    = statement->clobbers;
4438         for( ; clobber != NULL; clobber = clobber->next) {
4439                 if(strcmp(clobber->clobber, "memory") == 0) {
4440                         needs_memory = true;
4441                         continue;
4442                 }
4443
4444                 ident *id = new_id_from_str(clobber->clobber);
4445                 obstack_ptr_grow(&asm_obst, id);
4446                 ++n_clobbers;
4447         }
4448         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4449         ident **clobbers = NULL;
4450         if(n_clobbers > 0) {
4451                 clobbers = obstack_finish(&asm_obst);
4452         }
4453
4454         /* find and count input and output constraints */
4455         asm_constraint_t *constraint = statement->inputs;
4456         for( ; constraint != NULL; constraint = constraint->next) {
4457                 int  modifiers      = 0;
4458                 bool supports_memop = false;
4459                 for(const char *c = constraint->constraints; *c != 0; ++c) {
4460                         /* TODO: improve error messages */
4461                         switch(*c) {
4462                         case '?':
4463                         case '!':
4464                                 panic("multiple alternative assembler constraints not "
4465                                       "supported");
4466                         case 'm':
4467                         case 'o':
4468                         case 'V':
4469                         case '<':
4470                         case '>':
4471                         case 'X':
4472                                 supports_memop = true;
4473                                 obstack_1grow(&asm_obst, *c);
4474                                 break;
4475                         case '=':
4476                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
4477                                         panic("inconsistent register constraints");
4478                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4479                                 break;
4480                         case '+':
4481                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4482                                         panic("inconsistent register constraints");
4483                                 modifiers |= ASM_MODIFIER_READ_WRITE;
4484                                 break;
4485                         case '&':
4486                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4487                                 panic("early clobber assembler constraint not supported yet");
4488                                 break;
4489                         case '%':
4490                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4491                                 panic("commutative assembler constraint not supported yet");
4492                                 break;
4493                         case '#':
4494                                 /* skip register preferences stuff... */
4495                                 while(*c != 0 && *c != ',')
4496                                         ++c;
4497                                 break;
4498                         case '*':
4499                                 /* skip register preferences stuff... */
4500                                 ++c;
4501                                 break;
4502                         default:
4503                                 obstack_1grow(&asm_obst, *c);
4504                                 break;
4505                         }
4506                 }
4507                 obstack_1grow(&asm_obst, '\0');
4508                 const char *constraint_string = obstack_finish(&asm_obst);
4509
4510                 needs_memory |= supports_memop;
4511                 if(supports_memop) {
4512
4513                 }
4514         }
4515 #endif
4516 }
4517
4518 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4519         statement_to_firm(statement->try_statement);
4520         warningf(&statement->base.source_position, "structured exception handling ignored");
4521 }
4522
4523 static void     leave_statement_to_firm(leave_statement_t *statement) {
4524         errorf(&statement->base.source_position, "__leave not supported yet");
4525 }
4526
4527 /**
4528  * Transform a statement.
4529  */
4530 static void statement_to_firm(statement_t *statement)
4531 {
4532 #ifndef NDEBUG
4533         assert(!statement->base.transformed);
4534         statement->base.transformed = true;
4535 #endif
4536
4537         switch(statement->kind) {
4538         case STATEMENT_INVALID:
4539                 panic("invalid statement found");
4540                 return;
4541         case STATEMENT_EMPTY:
4542                 /* nothing */
4543                 return;
4544         case STATEMENT_COMPOUND:
4545                 compound_statement_to_firm(&statement->compound);
4546                 return;
4547         case STATEMENT_RETURN:
4548                 return_statement_to_firm(&statement->returns);
4549                 return;
4550         case STATEMENT_EXPRESSION:
4551                 expression_statement_to_firm(&statement->expression);
4552                 return;
4553         case STATEMENT_IF:
4554                 if_statement_to_firm(&statement->ifs);
4555                 return;
4556         case STATEMENT_WHILE:
4557                 while_statement_to_firm(&statement->whiles);
4558                 return;
4559         case STATEMENT_DO_WHILE:
4560                 do_while_statement_to_firm(&statement->do_while);
4561                 return;
4562         case STATEMENT_DECLARATION:
4563                 declaration_statement_to_firm(&statement->declaration);
4564                 return;
4565         case STATEMENT_BREAK:
4566                 create_jump_statement(statement, get_break_label());
4567                 return;
4568         case STATEMENT_CONTINUE:
4569                 create_jump_statement(statement, continue_label);
4570                 return;
4571         case STATEMENT_SWITCH:
4572                 switch_statement_to_firm(&statement->switchs);
4573                 return;
4574         case STATEMENT_CASE_LABEL:
4575                 case_label_to_firm(&statement->case_label);
4576                 return;
4577         case STATEMENT_FOR:
4578                 for_statement_to_firm(&statement->fors);
4579                 return;
4580         case STATEMENT_LABEL:
4581                 label_to_firm(&statement->label);
4582                 return;
4583         case STATEMENT_GOTO:
4584                 goto_to_firm(&statement->gotos);
4585                 return;
4586         case STATEMENT_ASM:
4587                 asm_statement_to_firm(&statement->asms);
4588                 return;
4589         case STATEMENT_MS_TRY:
4590                 ms_try_statement_to_firm(&statement->ms_try);
4591                 return;
4592         case STATEMENT_LEAVE:
4593                 leave_statement_to_firm(&statement->leave);
4594                 return;
4595         }
4596         panic("Statement not implemented\n");
4597 }
4598
4599 static int count_decls_in_expression(const expression_t *expression);
4600
4601 static int count_local_declarations(const declaration_t *      decl,
4602                                     const declaration_t *const end)
4603 {
4604         int count = 0;
4605         for (; decl != end; decl = decl->next) {
4606                 if(decl->namespc != NAMESPACE_NORMAL)
4607                         continue;
4608                 const type_t *type = skip_typeref(decl->type);
4609                 if (!decl->address_taken && is_type_scalar(type))
4610                         ++count;
4611                 const initializer_t *initializer = decl->init.initializer;
4612                 /* FIXME: should walk initializer hierarchies... */
4613                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4614                         count += count_decls_in_expression(initializer->value.value);
4615                 }
4616         }
4617         return count;
4618 }
4619
4620 static int count_decls_in_expression(const expression_t *expression) {
4621         int count = 0;
4622
4623         if(expression == NULL)
4624                 return 0;
4625
4626         switch((expression_kind_t) expression->base.kind) {
4627         case EXPR_STATEMENT:
4628                 return count_decls_in_stmts(expression->statement.statement);
4629         EXPR_BINARY_CASES {
4630                 int count_left  = count_decls_in_expression(expression->binary.left);
4631                 int count_right = count_decls_in_expression(expression->binary.right);
4632                 return count_left + count_right;
4633         }
4634         EXPR_UNARY_CASES
4635                 return count_decls_in_expression(expression->unary.value);
4636         case EXPR_CALL: {
4637                 call_argument_t *argument = expression->call.arguments;
4638                 for( ; argument != NULL; argument = argument->next) {
4639                         count += count_decls_in_expression(argument->expression);
4640                 }
4641                 return count;
4642         }
4643
4644         case EXPR_UNKNOWN:
4645         case EXPR_INVALID:
4646                 panic("unexpected expression kind");
4647
4648         case EXPR_COMPOUND_LITERAL:
4649                 /* TODO... */
4650                 break;
4651
4652         case EXPR_CONDITIONAL:
4653                 count += count_decls_in_expression(expression->conditional.condition);
4654                 count += count_decls_in_expression(expression->conditional.true_expression);
4655                 count += count_decls_in_expression(expression->conditional.false_expression);
4656                 return count;
4657
4658         case EXPR_BUILTIN_PREFETCH:
4659                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4660                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4661                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4662                 return count;
4663
4664         case EXPR_BUILTIN_CONSTANT_P:
4665                 count += count_decls_in_expression(expression->builtin_constant.value);
4666                 return count;
4667
4668         case EXPR_SELECT:
4669                 count += count_decls_in_expression(expression->select.compound);
4670                 return count;
4671
4672         case EXPR_ARRAY_ACCESS:
4673                 count += count_decls_in_expression(expression->array_access.array_ref);
4674                 count += count_decls_in_expression(expression->array_access.index);
4675                 return count;
4676
4677         case EXPR_CLASSIFY_TYPE:
4678                 count += count_decls_in_expression(expression->classify_type.type_expression);
4679                 return count;
4680
4681         case EXPR_SIZEOF:
4682         case EXPR_ALIGNOF: {
4683                 expression_t *tp_expression = expression->typeprop.tp_expression;
4684                 if (tp_expression != NULL) {
4685                         count += count_decls_in_expression(tp_expression);
4686                 }
4687                 return count;
4688         }
4689
4690         case EXPR_OFFSETOF:
4691         case EXPR_REFERENCE:
4692         case EXPR_CONST:
4693         case EXPR_CHARACTER_CONSTANT:
4694         case EXPR_WIDE_CHARACTER_CONSTANT:
4695         case EXPR_STRING_LITERAL:
4696         case EXPR_WIDE_STRING_LITERAL:
4697         case EXPR_FUNCNAME:
4698         case EXPR_BUILTIN_SYMBOL:
4699         case EXPR_VA_START:
4700         case EXPR_VA_ARG:
4701                 break;
4702         }
4703
4704         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4705          * (or implement all the missing expressions here/implement a walker)
4706          */
4707
4708         return 0;
4709 }
4710
4711 static int count_decls_in_stmts(const statement_t *stmt)
4712 {
4713         int count = 0;
4714         for (; stmt != NULL; stmt = stmt->base.next) {
4715                 switch (stmt->kind) {
4716                         case STATEMENT_EMPTY:
4717                                 break;
4718
4719                         case STATEMENT_DECLARATION: {
4720                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4721                                 count += count_local_declarations(decl_stmt->declarations_begin,
4722                                                                   decl_stmt->declarations_end->next);
4723                                 break;
4724                         }
4725
4726                         case STATEMENT_COMPOUND: {
4727                                 const compound_statement_t *const comp =
4728                                         &stmt->compound;
4729                                 count += count_decls_in_stmts(comp->statements);
4730                                 break;
4731                         }
4732
4733                         case STATEMENT_IF: {
4734                                 const if_statement_t *const if_stmt = &stmt->ifs;
4735                                 count += count_decls_in_expression(if_stmt->condition);
4736                                 count += count_decls_in_stmts(if_stmt->true_statement);
4737                                 count += count_decls_in_stmts(if_stmt->false_statement);
4738                                 break;
4739                         }
4740
4741                         case STATEMENT_SWITCH: {
4742                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4743                                 count += count_decls_in_expression(switch_stmt->expression);
4744                                 count += count_decls_in_stmts(switch_stmt->body);
4745                                 break;
4746                         }
4747
4748                         case STATEMENT_LABEL: {
4749                                 const label_statement_t *const label_stmt = &stmt->label;
4750                                 if(label_stmt->statement != NULL) {
4751                                         count += count_decls_in_stmts(label_stmt->statement);
4752                                 }
4753                                 break;
4754                         }
4755
4756                         case STATEMENT_WHILE: {
4757                                 const while_statement_t *const while_stmt = &stmt->whiles;
4758                                 count += count_decls_in_expression(while_stmt->condition);
4759                                 count += count_decls_in_stmts(while_stmt->body);
4760                                 break;
4761                         }
4762
4763                         case STATEMENT_DO_WHILE: {
4764                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4765                                 count += count_decls_in_expression(do_while_stmt->condition);
4766                                 count += count_decls_in_stmts(do_while_stmt->body);
4767                                 break;
4768                         }
4769
4770                         case STATEMENT_FOR: {
4771                                 const for_statement_t *const for_stmt = &stmt->fors;
4772                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4773                                 count += count_decls_in_expression(for_stmt->initialisation);
4774                                 count += count_decls_in_expression(for_stmt->condition);
4775                                 count += count_decls_in_expression(for_stmt->step);
4776                                 count += count_decls_in_stmts(for_stmt->body);
4777                                 break;
4778                         }
4779
4780                         case STATEMENT_CASE_LABEL: {
4781                                 const case_label_statement_t *label = &stmt->case_label;
4782                                 count += count_decls_in_expression(label->expression);
4783                                 if(label->statement != NULL) {
4784                                         count += count_decls_in_stmts(label->statement);
4785                                 }
4786                                 break;
4787                         }
4788
4789                         case STATEMENT_ASM:
4790                         case STATEMENT_BREAK:
4791                         case STATEMENT_CONTINUE:
4792                                 break;
4793
4794                         case STATEMENT_EXPRESSION: {
4795                                 const expression_statement_t *expr_stmt = &stmt->expression;
4796                                 count += count_decls_in_expression(expr_stmt->expression);
4797                                 break;
4798                         }
4799
4800                         case STATEMENT_GOTO:
4801                         case STATEMENT_LEAVE:
4802                         case STATEMENT_INVALID:
4803                                 break;
4804
4805                         case STATEMENT_RETURN: {
4806                                 const return_statement_t *ret_stmt = &stmt->returns;
4807                                 count += count_decls_in_expression(ret_stmt->value);
4808                                 break;
4809                         }
4810
4811                         case STATEMENT_MS_TRY: {
4812                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
4813                                 count += count_decls_in_stmts(try_stmt->try_statement);
4814                                 if(try_stmt->except_expression != NULL)
4815                                         count += count_decls_in_expression(try_stmt->except_expression);
4816                                 count += count_decls_in_stmts(try_stmt->final_statement);
4817                                 break;
4818                         }
4819                 }
4820         }
4821         return count;
4822 }
4823
4824 static int get_function_n_local_vars(declaration_t *declaration)
4825 {
4826         int count = 0;
4827
4828         /* count parameters */
4829         count += count_local_declarations(declaration->scope.declarations, NULL);
4830
4831         /* count local variables declared in body */
4832         count += count_decls_in_stmts(declaration->init.statement);
4833
4834         return count;
4835 }
4836
4837 static void initialize_function_parameters(declaration_t *declaration)
4838 {
4839         ir_graph        *irg             = current_ir_graph;
4840         ir_node         *args            = get_irg_args(irg);
4841         ir_node         *start_block     = get_irg_start_block(irg);
4842         ir_type         *function_irtype = get_ir_type(declaration->type);
4843
4844         int            n         = 0;
4845         declaration_t *parameter = declaration->scope.declarations;
4846         for( ; parameter != NULL; parameter = parameter->next, ++n) {
4847                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4848                 type_t *type = skip_typeref(parameter->type);
4849
4850                 bool needs_entity = parameter->address_taken;
4851                 assert(!is_type_array(type));
4852                 if(is_type_compound(type)) {
4853                         needs_entity = true;
4854                 }
4855
4856                 if(needs_entity) {
4857                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4858                         ident     *id     = new_id_from_str(parameter->symbol->string);
4859                         set_entity_ident(entity, id);
4860
4861                         parameter->declaration_kind
4862                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4863                         parameter->v.entity = entity;
4864                         continue;
4865                 }
4866
4867                 ir_mode *mode = get_ir_mode(parameter->type);
4868                 long     pn   = n;
4869                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4870
4871                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4872                 parameter->v.value_number   = next_value_number_function;
4873                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4874                 ++next_value_number_function;
4875
4876                 set_value(parameter->v.value_number, proj);
4877         }
4878 }
4879
4880 /**
4881  * Handle additional decl modifiers for IR-graphs
4882  *
4883  * @param irg            the IR-graph
4884  * @param dec_modifiers  additional modifiers
4885  */
4886 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4887 {
4888         if (decl_modifiers & DM_NORETURN) {
4889                 /* TRUE if the declaration includes the Microsoft
4890                    __declspec(noreturn) specifier. */
4891                 set_irg_additional_property(irg, mtp_property_noreturn);
4892         }
4893         if (decl_modifiers & DM_NOTHROW) {
4894                 /* TRUE if the declaration includes the Microsoft
4895                    __declspec(nothrow) specifier. */
4896                 set_irg_additional_property(irg, mtp_property_nothrow);
4897         }
4898         if (decl_modifiers & DM_NAKED) {
4899                 /* TRUE if the declaration includes the Microsoft
4900                    __declspec(naked) specifier. */
4901                 set_irg_additional_property(irg, mtp_property_naked);
4902         }
4903         if (decl_modifiers & DM_FORCEINLINE) {
4904                 /* TRUE if the declaration includes the
4905                    Microsoft __forceinline specifier. */
4906                 set_irg_inline_property(irg, irg_inline_forced);
4907         }
4908         if (decl_modifiers & DM_NOINLINE) {
4909                 /* TRUE if the declaration includes the Microsoft
4910                    __declspec(noinline) specifier. */
4911                 set_irg_inline_property(irg, irg_inline_forbidden);
4912         }
4913 }
4914
4915 /**
4916  * Create code for a function.
4917  */
4918 static void create_function(declaration_t *declaration)
4919 {
4920         ir_entity *function_entity = get_function_entity(declaration);
4921
4922         if(declaration->init.statement == NULL)
4923                 return;
4924
4925         current_function_decl = declaration;
4926         current_function_name = NULL;
4927         current_funcsig       = NULL;
4928
4929         assert(imature_blocks == NULL);
4930         imature_blocks = NEW_ARR_F(ir_node*, 0);
4931
4932         int       n_local_vars = get_function_n_local_vars(declaration);
4933         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4934
4935         set_irg_fp_model(irg, firm_opt.fp_model);
4936         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
4937         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
4938
4939         ir_node *first_block = get_cur_block();
4940
4941         /* set inline flags */
4942         if (declaration->is_inline)
4943                 set_irg_inline_property(irg, irg_inline_recomended);
4944         handle_decl_modifier_irg(irg, declaration->decl_modifiers);
4945
4946         next_value_number_function = 0;
4947         initialize_function_parameters(declaration);
4948
4949         statement_to_firm(declaration->init.statement);
4950
4951         ir_node *end_block = get_irg_end_block(irg);
4952
4953         /* do we have a return statement yet? */
4954         if(get_cur_block() != NULL) {
4955                 type_t *type = skip_typeref(declaration->type);
4956                 assert(is_type_function(type));
4957                 const function_type_t *func_type   = &type->function;
4958                 const type_t          *return_type
4959                         = skip_typeref(func_type->return_type);
4960
4961                 ir_node *ret;
4962                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4963                         ret = new_Return(get_store(), 0, NULL);
4964                 } else {
4965                         ir_mode *mode;
4966                         if(is_type_scalar(return_type)) {
4967                                 mode = get_ir_mode(func_type->return_type);
4968                         } else {
4969                                 mode = mode_P_data;
4970                         }
4971
4972                         ir_node *in[1];
4973                         /* §5.1.2.2.3 main implicitly returns 0 */
4974                         if (strcmp(declaration->symbol->string, "main") == 0) {
4975                                 in[0] = new_Const(mode, get_mode_null(mode));
4976                         } else {
4977                                 in[0] = new_Unknown(mode);
4978                                 if(warning.return_type) {
4979                                         warningf(&declaration->source_position,
4980                                                 "missing return statement at end of non-void function '%Y'",
4981                                                 declaration->symbol);
4982                                 }
4983                         }
4984                         ret = new_Return(get_store(), 1, in);
4985                 }
4986                 add_immBlock_pred(end_block, ret);
4987         }
4988
4989         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4990                 mature_immBlock(imature_blocks[i]);
4991         }
4992         DEL_ARR_F(imature_blocks);
4993         imature_blocks = NULL;
4994
4995         mature_immBlock(first_block);
4996         mature_immBlock(end_block);
4997
4998         irg_finalize_cons(irg);
4999
5000         /* finalize the frame type */
5001         ir_type *frame_type = get_irg_frame_type(irg);
5002         int      n          = get_compound_n_members(frame_type);
5003         int      align_all  = 4;
5004         int      offset     = 0;
5005         for(int i = 0; i < n; ++i) {
5006                 ir_entity *entity      = get_compound_member(frame_type, i);
5007                 ir_type   *entity_type = get_entity_type(entity);
5008
5009                 int align = get_type_alignment_bytes(entity_type);
5010                 if(align > align_all)
5011                         align_all = align;
5012                 int misalign = 0;
5013                 if(align > 0) {
5014                         misalign  = offset % align;
5015                         if(misalign > 0) {
5016                                 offset += align - misalign;
5017                         }
5018                 }
5019
5020                 set_entity_offset(entity, offset);
5021                 offset += get_type_size_bytes(entity_type);
5022         }
5023         set_type_size_bytes(frame_type, offset);
5024         set_type_alignment_bytes(frame_type, align_all);
5025
5026         irg_vrfy(irg);
5027 }
5028
5029 static void scope_to_firm(scope_t *scope)
5030 {
5031         /* first pass: create declarations */
5032         declaration_t *declaration = scope->declarations;
5033         for( ; declaration != NULL; declaration = declaration->next) {
5034                 if(declaration->namespc != NAMESPACE_NORMAL)
5035                         continue;
5036                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5037                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5038                         continue;
5039                 if(declaration->symbol == NULL)
5040                         continue;
5041
5042                 type_t *type = skip_typeref(declaration->type);
5043                 if(is_type_function(type)) {
5044                         get_function_entity(declaration);
5045                 } else {
5046                         create_global_variable(declaration);
5047                 }
5048         }
5049
5050         /* second pass: create code/initializers */
5051         declaration = scope->declarations;
5052         for( ; declaration != NULL; declaration = declaration->next) {
5053                 if(declaration->namespc != NAMESPACE_NORMAL)
5054                         continue;
5055                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5056                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5057                         continue;
5058                 if(declaration->symbol == NULL)
5059                         continue;
5060
5061                 type_t *type = declaration->type;
5062                 if(type->kind == TYPE_FUNCTION) {
5063                         create_function(declaration);
5064                 } else {
5065                         assert(declaration->declaration_kind
5066                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5067                         current_ir_graph = get_const_code_irg();
5068                         create_declaration_initializer(declaration);
5069                 }
5070         }
5071 }
5072
5073 void init_ast2firm(void)
5074 {
5075         obstack_init(&asm_obst);
5076         init_atomic_modes();
5077
5078         id_underscore = new_id_from_chars("_", 1);
5079         id_imp        = new_id_from_chars("__imp_", 6);
5080
5081         /* OS option must be set to the backend */
5082         const char *s = "ia32-gasmode=linux";
5083         switch (firm_opt.os_support) {
5084         case OS_SUPPORT_MINGW:
5085                 create_ld_ident = create_ld_ident_win32;
5086                 s = "ia32-gasmode=mingw";
5087                 break;
5088         case OS_SUPPORT_LINUX:
5089                 create_ld_ident = create_ld_ident_linux_elf;
5090                 s = "ia32-gasmode=linux"; break;
5091                 break;
5092         case OS_SUPPORT_MACHO:
5093                 create_ld_ident = create_ld_ident_macho;
5094                 s = "ia32-gasmode=macho"; break;
5095                 break;
5096         }
5097         firm_be_option(s);
5098
5099         /* create idents for all known runtime functions */
5100         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5101                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5102         }
5103 }
5104
5105 static void init_ir_types(void)
5106 {
5107         static int ir_types_initialized = 0;
5108         if(ir_types_initialized)
5109                 return;
5110         ir_types_initialized = 1;
5111
5112         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
5113         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
5114         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
5115
5116         ir_type_int        = get_ir_type(type_int);
5117         ir_type_const_char = get_ir_type(type_const_char);
5118         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5119         ir_type_void       = get_ir_type(type_void);
5120 }
5121
5122 void exit_ast2firm(void)
5123 {
5124         obstack_free(&asm_obst, NULL);
5125 }
5126
5127 void translation_unit_to_firm(translation_unit_t *unit)
5128 {
5129         /* just to be sure */
5130         continue_label      = NULL;
5131         break_label         = NULL;
5132         current_switch_cond = NULL;
5133
5134         init_ir_types();
5135
5136         scope_to_firm(&unit->scope);
5137 }