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 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "adt/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "entitymap_t.h"
  50 #include "driver/firm_opt.h"
  51 #include "driver/firm_cmdline.h"
  52
  53 static ir_type *ir_type_const_char;
  54 static ir_type *ir_type_wchar_t;
  55 static ir_type *ir_type_void;
  56 static ir_type *ir_type_int;
  57
  58 /* architecture specific floating point arithmetic mode (if any) */
  59 static ir_mode *mode_float_arithmetic;
  60
  61 static int        next_value_number_function;
  62 static ir_node   *continue_label;
  63 static ir_node   *break_label;
  64 static ir_node   *current_switch_cond;
  65 static bool       saw_default_label;
  66 static label_t  **all_labels;
  67 static entity_t **inner_functions;
  68 static ir_node   *ijmp_list;
  69 static bool       constant_folding;
  70
  71 extern bool       have_const_functions;
  72
  73 static const entity_t     *current_function_entity;
  74 static ir_node            *current_function_name;
  75 static ir_node            *current_funcsig;
  76 static switch_statement_t *current_switch;
  77 static ir_graph           *current_function;
  78 static translation_unit_t *current_translation_unit;
  79
  80 static entitymap_t  entitymap;
  81
  82 static struct obstack asm_obst;
  83
  84 typedef enum declaration_kind_t {
  85         DECLARATION_KIND_UNKNOWN,
  86         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  87         DECLARATION_KIND_GLOBAL_VARIABLE,
  88         DECLARATION_KIND_LOCAL_VARIABLE,
  89         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  90         DECLARATION_KIND_PARAMETER,
  91         DECLARATION_KIND_PARAMETER_ENTITY,
  92         DECLARATION_KIND_FUNCTION,
  93         DECLARATION_KIND_COMPOUND_MEMBER,
  94         DECLARATION_KIND_INNER_FUNCTION
  95 } declaration_kind_t;
  96
  97 static ir_mode *get_ir_mode_storage(type_t *type);
  98 /*
  99  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 100  * int that it returns bigger modes for floating point on some platforms
 101  * (x87 internally does arithemtic with 80bits)
 102  */
 103 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 104
 105 static ir_type *get_ir_type_incomplete(type_t *type);
 106
 107 static void enqueue_inner_function(entity_t *entity)
 108 {
 109         ARR_APP1(entity_t*, inner_functions, entity);
 110 }
 111
 112 static entity_t *next_inner_function(void)
 113 {
 114         int len = ARR_LEN(inner_functions);
 115         if (len == 0)
 116                 return NULL;
 117
 118         entity_t *entity = inner_functions[len-1];
 119         ARR_SHRINKLEN(inner_functions, len-1);
 120
 121         return entity;
 122 }
 123
 124 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 125 {
 126         const entity_t *entity = get_irg_loc_description(irg, pos);
 127
 128         if (entity != NULL) {
 129                 warningf(&entity->base.source_position,
 130                          "%s '%#T' might be used uninitialized",
 131                          get_entity_kind_name(entity->kind),
 132                          entity->declaration.type, entity->base.symbol);
 133         }
 134         return new_r_Unknown(irg, mode);
 135 }
 136
 137 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 138 {
 139         const source_position_t *pos = (const source_position_t*) dbg;
 140         if (pos == NULL)
 141                 return 0;
 142         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 143                                    pos->linenr);
 144 }
 145
 146 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 147 {
 148         const source_position_t *pos = (const source_position_t*) dbg;
 149         if (pos == NULL)
 150                 return NULL;
 151         if (line != NULL)
 152                 *line = pos->linenr;
 153         return pos->input_name;
 154 }
 155
 156 static dbg_info *get_dbg_info(const source_position_t *pos)
 157 {
 158         return (dbg_info*) pos;
 159 }
 160
 161 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 162
 163 static ir_mode *mode_int, *mode_uint;
 164
 165 static ir_node *_expression_to_firm(const expression_t *expression);
 166 static ir_node *expression_to_firm(const expression_t *expression);
 167 static void create_local_declaration(entity_t *entity);
 168
 169 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 170 {
 171         unsigned flags = get_atomic_type_flags(kind);
 172         unsigned size  = get_atomic_type_size(kind);
 173         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 174                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 175                 char            name[64];
 176                 ir_mode_sort    sort;
 177                 unsigned        bit_size     = size * 8;
 178                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 179                 unsigned        modulo_shift;
 180                 ir_mode_arithmetic arithmetic;
 181
 182                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 183                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 184                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 185                                  bit_size);
 186                         sort         = irms_int_number;
 187                         arithmetic   = irma_twos_complement;
 188                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 189                 } else {
 190                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 191                         snprintf(name, sizeof(name), "F%u", bit_size);
 192                         sort         = irms_float_number;
 193                         arithmetic   = irma_ieee754;
 194                         modulo_shift = 0;
 195                 }
 196                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 197                                    modulo_shift);
 198         }
 199
 200         return NULL;
 201 }
 202
 203 /**
 204  * Initialises the atomic modes depending on the machine size.
 205  */
 206 static void init_atomic_modes(void)
 207 {
 208         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 209                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 210         }
 211         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 212         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 213
 214         /* there's no real void type in firm */
 215         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 216
 217         /* initialize pointer modes */
 218         char            name[64];
 219         ir_mode_sort    sort         = irms_reference;
 220         unsigned        bit_size     = machine_size;
 221         bool            is_signed    = 0;
 222         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 223         unsigned        modulo_shift
 224                 = bit_size < machine_size ? machine_size : bit_size;
 225
 226         snprintf(name, sizeof(name), "p%u", machine_size);
 227         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 228                                         modulo_shift);
 229
 230         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 231         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 232
 233         /* Hmm, pointers should be machine size */
 234         set_modeP_data(ptr_mode);
 235         set_modeP_code(ptr_mode);
 236 }
 237
 238 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 239 {
 240         assert(kind <= ATOMIC_TYPE_LAST);
 241         return atomic_modes[kind];
 242 }
 243
 244 static unsigned get_compound_type_size(compound_type_t *type)
 245 {
 246         ir_type *irtype = get_ir_type((type_t*) type);
 247         return get_type_size_bytes(irtype);
 248 }
 249
 250 static unsigned get_array_type_size(array_type_t *type)
 251 {
 252         assert(!type->is_vla);
 253         ir_type *irtype = get_ir_type((type_t*) type);
 254         return get_type_size_bytes(irtype);
 255 }
 256
 257 static unsigned get_type_size_const(type_t *type)
 258 {
 259         switch(type->kind) {
 260         case TYPE_ERROR:
 261                 panic("error type occurred");
 262         case TYPE_ATOMIC:
 263                 return get_atomic_type_size(type->atomic.akind);
 264         case TYPE_COMPLEX:
 265                 return 2 * get_atomic_type_size(type->complex.akind);
 266         case TYPE_IMAGINARY:
 267                 return get_atomic_type_size(type->imaginary.akind);
 268         case TYPE_ENUM:
 269                 return get_atomic_type_size(type->enumt.akind);
 270         case TYPE_COMPOUND_UNION:
 271         case TYPE_COMPOUND_STRUCT:
 272                 return get_compound_type_size(&type->compound);
 273         case TYPE_FUNCTION:
 274                 /* just a pointer to the function */
 275                 return get_mode_size_bytes(mode_P_code);
 276         case TYPE_POINTER:
 277         case TYPE_REFERENCE:
 278                 return get_mode_size_bytes(mode_P_data);
 279         case TYPE_ARRAY:
 280                 return get_array_type_size(&type->array);
 281         case TYPE_BUILTIN:
 282                 return get_type_size_const(type->builtin.real_type);
 283         case TYPE_BITFIELD:
 284                 panic("type size of bitfield request");
 285         case TYPE_TYPEDEF:
 286         case TYPE_TYPEOF:
 287         case TYPE_INVALID:
 288                 break;
 289         }
 290         panic("Trying to determine size of invalid type");
 291 }
 292
 293 static ir_node *get_vla_size(array_type_t *const type)
 294 {
 295         ir_node *size_node = type->size_node;
 296         if (size_node == NULL) {
 297                 size_node = expression_to_firm(type->size_expression);
 298                 type->size_node = size_node;
 299         }
 300         return size_node;
 301 }
 302
 303 static ir_node *get_type_size(type_t *type)
 304 {
 305         type = skip_typeref(type);
 306
 307         if (is_type_array(type) && type->array.is_vla) {
 308                 ir_node *size_node = get_vla_size(&type->array);
 309                 ir_node *elem_size = get_type_size(type->array.element_type);
 310                 ir_mode *mode      = get_irn_mode(size_node);
 311                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 312                 return real_size;
 313         }
 314
 315         ir_mode *mode = get_ir_mode_storage(type_size_t);
 316         symconst_symbol sym;
 317         sym.type_p = get_ir_type(type);
 318         return new_SymConst(mode, sym, symconst_type_size);
 319 }
 320
 321 static unsigned count_parameters(const function_type_t *function_type)
 322 {
 323         unsigned count = 0;
 324
 325         function_parameter_t *parameter = function_type->parameters;
 326         for ( ; parameter != NULL; parameter = parameter->next) {
 327                 ++count;
 328         }
 329
 330         return count;
 331 }
 332
 333 static type_t *get_aligned_type(type_t *type, int alignment)
 334 {
 335         if (alignment == 0)
 336                 return type;
 337
 338         type = skip_typeref(type);
 339         if (alignment > type->base.alignment) {
 340                 type_t *copy         = duplicate_type(type);
 341                 copy->base.alignment = alignment;
 342                 type                 = identify_new_type(copy);
 343         }
 344         return type;
 345 }
 346
 347 /**
 348  * Creates a Firm type for an atomic type
 349  */
 350 static ir_type *create_atomic_type(atomic_type_kind_t akind, int alignment)
 351 {
 352         ir_mode            *mode   = atomic_modes[akind];
 353         ident              *id     = get_mode_ident(mode);
 354         ir_type            *irtype = new_type_primitive(id, mode);
 355
 356         set_type_alignment_bytes(irtype, alignment);
 357
 358         return irtype;
 359 }
 360
 361 /**
 362  * Creates a Firm type for a complex type
 363  */
 364 static ir_type *create_complex_type(const complex_type_t *type)
 365 {
 366         atomic_type_kind_t  kind = type->akind;
 367         ir_mode            *mode = atomic_modes[kind];
 368         ident              *id   = get_mode_ident(mode);
 369
 370         (void) id;
 371
 372         /* FIXME: finish the array */
 373         return NULL;
 374 }
 375
 376 /**
 377  * Creates a Firm type for an imaginary type
 378  */
 379 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 380 {
 381         atomic_type_kind_t  kind      = type->akind;
 382         ir_mode            *mode      = atomic_modes[kind];
 383         ident              *id        = get_mode_ident(mode);
 384         ir_type            *irtype    = new_type_primitive(id, mode);
 385
 386         set_type_alignment_bytes(irtype, type->base.alignment);
 387
 388         return irtype;
 389 }
 390
 391 /**
 392  * return type of a parameter (and take transparent union gnu extension into
 393  * account)
 394  */
 395 static type_t *get_parameter_type(type_t *type)
 396 {
 397         type = skip_typeref(type);
 398         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 399                 compound_t *compound = type->compound.compound;
 400                 type                 = compound->members.entities->declaration.type;
 401         }
 402
 403         return type;
 404 }
 405
 406 static ir_type *create_method_type(const function_type_t *function_type)
 407 {
 408         type_t  *return_type  = skip_typeref(function_type->return_type);
 409
 410         ident   *id           = id_unique("functiontype.%u");
 411         int      n_parameters = count_parameters(function_type);
 412         int      n_results    = return_type == type_void ? 0 : 1;
 413         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 414
 415         if (return_type != type_void) {
 416                 ir_type *restype = get_ir_type(return_type);
 417                 set_method_res_type(irtype, 0, restype);
 418         }
 419
 420         function_parameter_t *parameter = function_type->parameters;
 421         int                   n         = 0;
 422         for ( ; parameter != NULL; parameter = parameter->next) {
 423                 type_t  *type     = get_parameter_type(parameter->type);
 424                 ir_type *p_irtype = get_ir_type(type);
 425                 set_method_param_type(irtype, n, p_irtype);
 426                 ++n;
 427         }
 428
 429         if (function_type->variadic || function_type->unspecified_parameters) {
 430                 set_method_variadicity(irtype, variadicity_variadic);
 431         }
 432
 433         unsigned cc = get_method_calling_convention(irtype);
 434         switch (function_type->calling_convention) {
 435         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 436         case CC_CDECL:
 437 is_cdecl:
 438                 set_method_calling_convention(irtype, SET_CDECL(cc));
 439                 break;
 440
 441         case CC_STDCALL:
 442                 if (function_type->variadic || function_type->unspecified_parameters)
 443                         goto is_cdecl;
 444
 445                 /* only non-variadic function can use stdcall, else use cdecl */
 446                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 447                 break;
 448
 449         case CC_FASTCALL:
 450                 if (function_type->variadic || function_type->unspecified_parameters)
 451                         goto is_cdecl;
 452                 /* only non-variadic function can use fastcall, else use cdecl */
 453                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 454                 break;
 455
 456         case CC_THISCALL:
 457                 /* Hmm, leave default, not accepted by the parser yet. */
 458                 break;
 459         }
 460
 461         return irtype;
 462 }
 463
 464 static ir_type *create_pointer_type(pointer_type_t *type)
 465 {
 466         type_t   *points_to    = type->points_to;
 467         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 468         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 469                                                   ir_points_to, mode_P_data);
 470
 471         return ir_type;
 472 }
 473
 474 static ir_type *create_reference_type(reference_type_t *type)
 475 {
 476         type_t  *refers_to    = type->refers_to;
 477         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 478         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 479                                                  ir_refers_to, mode_P_data);
 480
 481         return ir_type;
 482 }
 483
 484 static ir_type *create_array_type(array_type_t *type)
 485 {
 486         type_t  *element_type    = type->element_type;
 487         ir_type *ir_element_type = get_ir_type(element_type);
 488
 489         ident    *id      = id_unique("array.%u");
 490         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 491
 492         const int align = get_type_alignment_bytes(ir_element_type);
 493         set_type_alignment_bytes(ir_type, align);
 494
 495         if (type->size_constant) {
 496                 int n_elements = type->size;
 497
 498                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 499
 500                 size_t elemsize = get_type_size_bytes(ir_element_type);
 501                 if (elemsize % align > 0) {
 502                         elemsize += align - (elemsize % align);
 503                 }
 504                 set_type_size_bytes(ir_type, n_elements * elemsize);
 505         } else {
 506                 set_array_lower_bound_int(ir_type, 0, 0);
 507         }
 508         set_type_state(ir_type, layout_fixed);
 509
 510         return ir_type;
 511 }
 512
 513 /**
 514  * Return the signed integer type of size bits.
 515  *
 516  * @param size   the size
 517  */
 518 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 519                                                  unsigned size)
 520 {
 521         static ir_mode *s_modes[64 + 1] = {NULL, };
 522         ir_type *res;
 523         ir_mode *mode;
 524
 525         if (size <= 0 || size > 64)
 526                 return NULL;
 527
 528         mode = s_modes[size];
 529         if (mode == NULL) {
 530                 char name[32];
 531
 532                 snprintf(name, sizeof(name), "bf_I%u", size);
 533                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 534                                    size <= 32 ? 32 : size );
 535                 s_modes[size] = mode;
 536         }
 537
 538         char name[32];
 539         snprintf(name, sizeof(name), "I%u", size);
 540         ident *id = new_id_from_str(name);
 541         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 542         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 543         set_primitive_base_type(res, base_tp);
 544
 545         return res;
 546 }
 547
 548 /**
 549  * Return the unsigned integer type of size bits.
 550  *
 551  * @param size   the size
 552  */
 553 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 554                                                    unsigned size)
 555 {
 556         static ir_mode *u_modes[64 + 1] = {NULL, };
 557         ir_type *res;
 558         ir_mode *mode;
 559
 560         if (size <= 0 || size > 64)
 561                 return NULL;
 562
 563         mode = u_modes[size];
 564         if (mode == NULL) {
 565                 char name[32];
 566
 567                 snprintf(name, sizeof(name), "bf_U%u", size);
 568                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 569                                    size <= 32 ? 32 : size );
 570                 u_modes[size] = mode;
 571         }
 572
 573         char name[32];
 574
 575         snprintf(name, sizeof(name), "U%u", size);
 576         ident *id = new_id_from_str(name);
 577         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 578         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 579         set_primitive_base_type(res, base_tp);
 580
 581         return res;
 582 }
 583
 584 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 585 {
 586         type_t *base = skip_typeref(type->base_type);
 587         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 588         ir_type *irbase = get_ir_type(base);
 589
 590         unsigned size = type->bit_size;
 591
 592         assert(!is_type_float(base));
 593         if (is_type_signed(base)) {
 594                 return get_signed_int_type_for_bit_size(irbase, size);
 595         } else {
 596                 return get_unsigned_int_type_for_bit_size(irbase, size);
 597         }
 598 }
 599
 600 #define INVALID_TYPE ((ir_type_ptr)-1)
 601
 602 enum {
 603         COMPOUND_IS_STRUCT = false,
 604         COMPOUND_IS_UNION  = true
 605 };
 606
 607 /**
 608  * Construct firm type from ast struct type.
 609  *
 610  * As anonymous inner structs get flattened to a single firm type, we might get
 611  * irtype, outer_offset and out_align passed (they represent the position of
 612  * the anonymous inner struct inside the resulting firm struct)
 613  */
 614 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 615                                      size_t *outer_offset, size_t *outer_align,
 616                                      bool incomplete, bool is_union)
 617 {
 618         compound_t *compound = type->compound;
 619
 620         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 621                 return compound->irtype;
 622         }
 623
 624         size_t align_all  = 1;
 625         size_t offset     = 0;
 626         size_t bit_offset = 0;
 627         size_t size       = 0;
 628
 629         if (irtype == NULL) {
 630                 symbol_t *symbol = compound->base.symbol;
 631                 ident    *id;
 632                 if (symbol != NULL) {
 633                         id = new_id_from_str(symbol->string);
 634                 } else {
 635                         if (is_union) {
 636                                 id = id_unique("__anonymous_union.%u");
 637                         } else {
 638                                 id = id_unique("__anonymous_struct.%u");
 639                         }
 640                 }
 641                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 642
 643                 if (is_union) {
 644                         irtype = new_d_type_union(id, dbgi);
 645                 } else {
 646                         irtype = new_d_type_struct(id, dbgi);
 647                 }
 648
 649                 compound->irtype_complete = false;
 650                 compound->irtype          = irtype;
 651         } else {
 652                 offset    = *outer_offset;
 653                 align_all = *outer_align;
 654         }
 655
 656         if (incomplete)
 657                 return irtype;
 658
 659         compound->irtype_complete = true;
 660
 661         entity_t *entry = compound->members.entities;
 662         for ( ; entry != NULL; entry = entry->base.next) {
 663                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 664                         continue;
 665
 666                 size_t prev_offset = offset;
 667
 668                 symbol_t *symbol     = entry->base.symbol;
 669                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 670                 entry_type
 671                         = get_aligned_type(entry_type, entry->compound_member.alignment);
 672                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 673
 674                 ident    *ident;
 675                 if (symbol != NULL) {
 676                         ident = new_id_from_str(symbol->string);
 677                 } else {
 678                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 679                                 create_compound_type(&entry_type->compound, irtype, &offset,
 680                                                      &align_all, false, COMPOUND_IS_STRUCT);
 681                                 goto finished_member;
 682                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 683                                 create_compound_type(&entry_type->compound, irtype, &offset,
 684                                                      &align_all, false, COMPOUND_IS_UNION);
 685                                 goto finished_member;
 686                         } else {
 687                                 assert(entry_type->kind == TYPE_BITFIELD);
 688                         }
 689                         ident = id_unique("anon.%u");
 690                 }
 691
 692                 ir_type *base_irtype;
 693                 if (entry_type->kind == TYPE_BITFIELD) {
 694                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 695                 } else {
 696                         base_irtype = get_ir_type(entry_type);
 697                 }
 698
 699                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 700                 size_t misalign        = offset % entry_alignment;
 701
 702                 ir_type   *entry_irtype = get_ir_type(entry_type);
 703                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 704
 705                 size_t base;
 706                 size_t bits_remainder;
 707                 if (entry_type->kind == TYPE_BITFIELD) {
 708                         size_t size_bits      = entry_type->bitfield.bit_size;
 709                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 710
 711                         if (size_bits > rest_size_bits) {
 712                                 /* start a new bucket */
 713                                 offset     += entry_alignment - misalign;
 714                                 bit_offset  = 0;
 715
 716                                 base           = offset;
 717                                 bits_remainder = 0;
 718                         } else {
 719                                 /* put into current bucket */
 720                                 base           = offset - misalign;
 721                                 bits_remainder = misalign * 8 + bit_offset;
 722                         }
 723
 724                         offset     += size_bits / 8;
 725                         bit_offset  = bit_offset + (size_bits % 8);
 726                 } else {
 727                         size_t entry_size = get_type_size_bytes(base_irtype);
 728                         if (misalign > 0 || bit_offset > 0)
 729                                 offset += entry_alignment - misalign;
 730
 731                         base           = offset;
 732                         bits_remainder = 0;
 733                         offset        += entry_size;
 734                         bit_offset     = 0;
 735                 }
 736
 737                 if (entry_alignment > align_all) {
 738                         if (entry_alignment % align_all != 0) {
 739                                 panic("uneven alignments not supported yet");
 740                         }
 741                         align_all = entry_alignment;
 742                 }
 743
 744                 set_entity_offset(entity, base);
 745                 set_entity_offset_bits_remainder(entity,
 746                                                  (unsigned char) bits_remainder);
 747                 //add_struct_member(irtype, entity);
 748                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 749                 assert(entry->compound_member.entity == NULL);
 750                 entry->compound_member.entity = entity;
 751
 752 finished_member:
 753                 if (is_union) {
 754                         size_t entry_size = offset - prev_offset;
 755                         if (entry_size > size) {
 756                                 size = entry_size;
 757                         }
 758                         offset     = 0;
 759                         bit_offset = 0;
 760                 }
 761         }
 762
 763         if (!is_union) {
 764                 size = offset;
 765         }
 766
 767         size_t misalign = offset % align_all;
 768         if (misalign > 0 || bit_offset > 0) {
 769                 size += align_all - misalign;
 770         }
 771
 772         if (outer_offset != NULL) {
 773                 if (!is_union) {
 774                         *outer_offset = offset;
 775                 } else {
 776                         *outer_offset += size;
 777                 }
 778
 779                 if (align_all > *outer_align) {
 780                         if (align_all % *outer_align != 0) {
 781                                 panic("uneven alignments not supported yet");
 782                         }
 783                         *outer_align = align_all;
 784                 }
 785         } else {
 786                 set_type_alignment_bytes(irtype, align_all);
 787                 set_type_size_bytes(irtype, size);
 788                 set_type_state(irtype, layout_fixed);
 789         }
 790
 791         return irtype;
 792 }
 793
 794 static ir_type *create_enum_type(enum_type_t *const type)
 795 {
 796         type->base.firm_type = ir_type_int;
 797
 798         ir_mode *const mode    = mode_int;
 799         tarval  *const one     = get_mode_one(mode);
 800         tarval  *      tv_next = get_tarval_null(mode);
 801
 802         bool constant_folding_old = constant_folding;
 803         constant_folding = true;
 804
 805         enum_t   *enume = type->enume;
 806         entity_t *entry = enume->base.next;
 807         for (; entry != NULL; entry = entry->base.next) {
 808                 if (entry->kind != ENTITY_ENUM_VALUE)
 809                         break;
 810
 811                 expression_t *const init = entry->enum_value.value;
 812                 if (init != NULL) {
 813                         ir_node *const cnst = expression_to_firm(init);
 814                         if (!is_Const(cnst)) {
 815                                 panic("couldn't fold constant");
 816                         }
 817                         tv_next = get_Const_tarval(cnst);
 818                 }
 819                 entry->enum_value.tv = tv_next;
 820                 tv_next = tarval_add(tv_next, one);
 821         }
 822
 823         constant_folding = constant_folding_old;
 824
 825         return create_atomic_type(type->akind, type->base.alignment);
 826 }
 827
 828 static ir_type *get_ir_type_incomplete(type_t *type)
 829 {
 830         assert(type != NULL);
 831         type = skip_typeref(type);
 832
 833         if (type->base.firm_type != NULL) {
 834                 assert(type->base.firm_type != INVALID_TYPE);
 835                 return type->base.firm_type;
 836         }
 837
 838         switch (type->kind) {
 839         case TYPE_COMPOUND_STRUCT:
 840                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 841                                             true, COMPOUND_IS_STRUCT);
 842         case TYPE_COMPOUND_UNION:
 843                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 844                                             true, COMPOUND_IS_UNION);
 845         default:
 846                 return get_ir_type(type);
 847         }
 848 }
 849
 850 ir_type *get_ir_type(type_t *type)
 851 {
 852         assert(type != NULL);
 853
 854         type = skip_typeref(type);
 855
 856         if (type->base.firm_type != NULL) {
 857                 assert(type->base.firm_type != INVALID_TYPE);
 858                 return type->base.firm_type;
 859         }
 860
 861         ir_type *firm_type = NULL;
 862         switch (type->kind) {
 863         case TYPE_ERROR:
 864                 /* Happens while constant folding, when there was an error */
 865                 return create_atomic_type(ATOMIC_TYPE_VOID, 0);
 866
 867         case TYPE_ATOMIC:
 868                 firm_type = create_atomic_type(type->atomic.akind,
 869                                                type->base.alignment);
 870                 break;
 871         case TYPE_COMPLEX:
 872                 firm_type = create_complex_type(&type->complex);
 873                 break;
 874         case TYPE_IMAGINARY:
 875                 firm_type = create_imaginary_type(&type->imaginary);
 876                 break;
 877         case TYPE_FUNCTION:
 878                 firm_type = create_method_type(&type->function);
 879                 break;
 880         case TYPE_POINTER:
 881                 firm_type = create_pointer_type(&type->pointer);
 882                 break;
 883         case TYPE_REFERENCE:
 884                 firm_type = create_reference_type(&type->reference);
 885                 break;
 886         case TYPE_ARRAY:
 887                 firm_type = create_array_type(&type->array);
 888                 break;
 889         case TYPE_COMPOUND_STRUCT:
 890                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 891                                                  false, COMPOUND_IS_STRUCT);
 892                 break;
 893         case TYPE_COMPOUND_UNION:
 894                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 895                                                  false, COMPOUND_IS_UNION);
 896                 break;
 897         case TYPE_ENUM:
 898                 firm_type = create_enum_type(&type->enumt);
 899                 break;
 900         case TYPE_BUILTIN:
 901                 firm_type = get_ir_type(type->builtin.real_type);
 902                 break;
 903         case TYPE_BITFIELD:
 904                 firm_type = create_bitfield_type(&type->bitfield);
 905                 break;
 906
 907         case TYPE_TYPEOF:
 908         case TYPE_TYPEDEF:
 909         case TYPE_INVALID:
 910                 break;
 911         }
 912         if (firm_type == NULL)
 913                 panic("unknown type found");
 914
 915         type->base.firm_type = firm_type;
 916         return firm_type;
 917 }
 918
 919 static ir_mode *get_ir_mode_storage(type_t *type)
 920 {
 921         ir_type *irtype = get_ir_type(type);
 922
 923         /* firm doesn't report a mode for arrays somehow... */
 924         if (is_Array_type(irtype)) {
 925                 return mode_P_data;
 926         }
 927
 928         ir_mode *mode = get_type_mode(irtype);
 929         assert(mode != NULL);
 930         return mode;
 931 }
 932
 933 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 934 {
 935         ir_mode *mode = get_ir_mode_storage(type);
 936         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 937                 return mode_float_arithmetic;
 938         }
 939
 940         return mode;
 941 }
 942
 943 /** Names of the runtime functions. */
 944 static const struct {
 945         int        id;           /**< the rts id */
 946         int        n_res;        /**< number of return values */
 947         const char *name;        /**< the name of the rts function */
 948         int        n_params;     /**< number of parameters */
 949         unsigned   flags;        /**< language flags */
 950 } rts_data[] = {
 951         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 952         { rts_abort,      0, "abort",        0, _C89 },
 953         { rts_alloca,     1, "alloca",       1, _ALL },
 954         { rts_abs,        1, "abs",          1, _C89 },
 955         { rts_labs,       1, "labs",         1, _C89 },
 956         { rts_llabs,      1, "llabs",        1, _C99 },
 957         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 958
 959         { rts_fabs,       1, "fabs",         1, _C89 },
 960         { rts_sqrt,       1, "sqrt",         1, _C89 },
 961         { rts_cbrt,       1, "cbrt",         1, _C99 },
 962         { rts_exp,        1, "exp",          1, _C89 },
 963         { rts_exp2,       1, "exp2",         1, _C89 },
 964         { rts_exp10,      1, "exp10",        1, _GNUC },
 965         { rts_log,        1, "log",          1, _C89 },
 966         { rts_log2,       1, "log2",         1, _C89 },
 967         { rts_log10,      1, "log10",        1, _C89 },
 968         { rts_pow,        1, "pow",          2, _C89 },
 969         { rts_sin,        1, "sin",          1, _C89 },
 970         { rts_cos,        1, "cos",          1, _C89 },
 971         { rts_tan,        1, "tan",          1, _C89 },
 972         { rts_asin,       1, "asin",         1, _C89 },
 973         { rts_acos,       1, "acos",         1, _C89 },
 974         { rts_atan,       1, "atan",         1, _C89 },
 975         { rts_sinh,       1, "sinh",         1, _C89 },
 976         { rts_cosh,       1, "cosh",         1, _C89 },
 977         { rts_tanh,       1, "tanh",         1, _C89 },
 978
 979         { rts_fabsf,      1, "fabsf",        1, _C99 },
 980         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 981         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 982         { rts_expf,       1, "expf",         1, _C99 },
 983         { rts_exp2f,      1, "exp2f",        1, _C99 },
 984         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 985         { rts_logf,       1, "logf",         1, _C99 },
 986         { rts_log2f,      1, "log2f",        1, _C99 },
 987         { rts_log10f,     1, "log10f",       1, _C99 },
 988         { rts_powf,       1, "powf",         2, _C99 },
 989         { rts_sinf,       1, "sinf",         1, _C99 },
 990         { rts_cosf,       1, "cosf",         1, _C99 },
 991         { rts_tanf,       1, "tanf",         1, _C99 },
 992         { rts_asinf,      1, "asinf",        1, _C99 },
 993         { rts_acosf,      1, "acosf",        1, _C99 },
 994         { rts_atanf,      1, "atanf",        1, _C99 },
 995         { rts_sinhf,      1, "sinhf",        1, _C99 },
 996         { rts_coshf,      1, "coshf",        1, _C99 },
 997         { rts_tanhf,      1, "tanhf",        1, _C99 },
 998
 999         { rts_fabsl,      1, "fabsl",        1, _C99 },
1000         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
1001         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
1002         { rts_expl,       1, "expl",         1, _C99 },
1003         { rts_exp2l,      1, "exp2l",        1, _C99 },
1004         { rts_exp10l,     1, "exp10l",       1, _GNUC },
1005         { rts_logl,       1, "logl",         1, _C99 },
1006         { rts_log2l,      1, "log2l",        1, _C99 },
1007         { rts_log10l,     1, "log10l",       1, _C99 },
1008         { rts_powl,       1, "powl",         2, _C99 },
1009         { rts_sinl,       1, "sinl",         1, _C99 },
1010         { rts_cosl,       1, "cosl",         1, _C99 },
1011         { rts_tanl,       1, "tanl",         1, _C99 },
1012         { rts_asinl,      1, "asinl",        1, _C99 },
1013         { rts_acosl,      1, "acosl",        1, _C99 },
1014         { rts_atanl,      1, "atanl",        1, _C99 },
1015         { rts_sinhl,      1, "sinhl",        1, _C99 },
1016         { rts_coshl,      1, "coshl",        1, _C99 },
1017         { rts_tanhl,      1, "tanhl",        1, _C99 },
1018
1019         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
1020         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
1021         { rts_strcmp,     1, "strcmp",       2, _C89 },
1022         { rts_strncmp,    1, "strncmp",      3, _C89 }
1023 };
1024
1025 static ident *rts_idents[lengthof(rts_data)];
1026
1027 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
1028
1029 /**
1030  * Handle GNU attributes for entities
1031  *
1032  * @param ent   the entity
1033  * @param decl  the routine declaration
1034  */
1035 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1036 {
1037         assert(is_declaration(entity));
1038         decl_modifiers_t modifiers = entity->declaration.modifiers;
1039         if (modifiers & DM_PURE) {
1040                 /* TRUE if the declaration includes the GNU
1041                    __attribute__((pure)) specifier. */
1042                 set_entity_additional_property(irentity, mtp_property_pure);
1043         }
1044         if (modifiers & DM_CONST) {
1045                 set_entity_additional_property(irentity, mtp_property_const);
1046                 have_const_functions = true;
1047         }
1048         if (modifiers & DM_USED) {
1049                 /* TRUE if the declaration includes the GNU
1050                    __attribute__((used)) specifier. */
1051                 set_entity_stickyness(irentity, stickyness_sticky);
1052         }
1053 }
1054
1055 static bool is_main(entity_t *entity)
1056 {
1057         static symbol_t *sym_main = NULL;
1058         if (sym_main == NULL) {
1059                 sym_main = symbol_table_insert("main");
1060         }
1061
1062         if (entity->base.symbol != sym_main)
1063                 return false;
1064         /* must be in outermost scope */
1065         if (entity->base.parent_scope != &current_translation_unit->scope)
1066                 return false;
1067
1068         return true;
1069 }
1070
1071 /**
1072  * Creates an entity representing a function.
1073  *
1074  * @param declaration  the function declaration
1075  */
1076 static ir_entity *get_function_entity(entity_t *entity)
1077 {
1078         assert(entity->kind == ENTITY_FUNCTION);
1079         if (entity->function.entity != NULL) {
1080                 return entity->function.entity;
1081         }
1082
1083         if (is_main(entity)) {
1084                 /* force main to C linkage */
1085                 type_t *type = entity->declaration.type;
1086                 assert(is_type_function(type));
1087                 if (type->function.linkage != LINKAGE_C) {
1088                         type_t *new_type           = duplicate_type(type);
1089                         new_type->function.linkage = LINKAGE_C;
1090                         type                       = identify_new_type(new_type);
1091                         entity->declaration.type   = type;
1092                 }
1093         }
1094
1095         symbol_t *symbol = entity->base.symbol;
1096         ident    *id     = new_id_from_str(symbol->string);
1097
1098         ir_type   *global_type    = get_glob_type();
1099         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1100         bool const has_body       = entity->function.statement != NULL;
1101
1102         /* already an entity defined? */
1103         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1104         if (irentity != NULL) {
1105                 if (get_entity_visibility(irentity) == visibility_external_allocated
1106                                 && has_body) {
1107                         set_entity_visibility(irentity, visibility_external_visible);
1108                 }
1109                 goto entity_created;
1110         }
1111
1112         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1113         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1114         set_entity_ld_ident(irentity, create_ld_ident(entity));
1115
1116         handle_gnu_attributes_ent(irentity, entity);
1117
1118         /* static inline             => local
1119          * extern inline             => local
1120          * inline without definition => local
1121          * inline with definition    => external_visible */
1122         storage_class_tag_t const storage_class
1123                 = (storage_class_tag_t) entity->declaration.storage_class;
1124         bool                const is_inline     = entity->function.is_inline;
1125         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1126                 set_entity_visibility(irentity, visibility_external_visible);
1127         } else if (storage_class == STORAGE_CLASS_STATIC ||
1128                    (is_inline && has_body)) {
1129                 if (!has_body) {
1130                         /* this entity was declared, but is defined nowhere */
1131                         set_entity_peculiarity(irentity, peculiarity_description);
1132                 }
1133                 set_entity_visibility(irentity, visibility_local);
1134         } else if (has_body) {
1135                 set_entity_visibility(irentity, visibility_external_visible);
1136         } else {
1137                 set_entity_visibility(irentity, visibility_external_allocated);
1138         }
1139         set_entity_allocation(irentity, allocation_static);
1140
1141         /* We should check for file scope here, but as long as we compile C only
1142            this is not needed. */
1143         if (! firm_opt.freestanding) {
1144                 /* check for a known runtime function */
1145                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1146                         if (id != rts_idents[i])
1147                                 continue;
1148
1149                         /* ignore those rts functions not necessary needed for current mode */
1150                         if ((c_mode & rts_data[i].flags) == 0)
1151                                 continue;
1152                         assert(rts_entities[rts_data[i].id] == NULL);
1153                         rts_entities[rts_data[i].id] = irentity;
1154                 }
1155         }
1156
1157         entitymap_insert(&entitymap, symbol, irentity);
1158
1159 entity_created:
1160         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1161         entity->function.entity  = irentity;
1162
1163         return irentity;
1164 }
1165
1166 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1167 {
1168         ir_mode *value_mode = get_irn_mode(value);
1169
1170         if (value_mode == dest_mode || is_Bad(value))
1171                 return value;
1172
1173         if (dest_mode == mode_b) {
1174                 ir_node *zero = new_Const(get_mode_null(value_mode));
1175                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1176                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1177                 return proj;
1178         }
1179
1180         return new_d_Conv(dbgi, value, dest_mode);
1181 }
1182
1183 /**
1184  * Creates a Const node representing a constant.
1185  */
1186 static ir_node *const_to_firm(const const_expression_t *cnst)
1187 {
1188         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1189         type_t   *type = skip_typeref(cnst->base.type);
1190         ir_mode  *mode = get_ir_mode_storage(type);
1191
1192         char    buf[128];
1193         tarval *tv;
1194         size_t  len;
1195         if (mode_is_float(mode)) {
1196                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1197         } else {
1198                 if (mode_is_signed(mode)) {
1199                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1200                 } else {
1201                         len = snprintf(buf, sizeof(buf), "%llu",
1202                                        (unsigned long long) cnst->v.int_value);
1203                 }
1204                 tv = new_tarval_from_str(buf, len, mode);
1205         }
1206
1207         ir_node *res        = new_d_Const(dbgi, tv);
1208         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1209         return create_conv(dbgi, res, mode_arith);
1210 }
1211
1212 /**
1213  * Creates a Const node representing a character constant.
1214  */
1215 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1216 {
1217         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1218         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1219
1220         long long int v;
1221         size_t const  size = cnst->v.character.size;
1222         if (size == 1 && char_is_signed) {
1223                 v = (signed char)cnst->v.character.begin[0];
1224         } else {
1225                 v = 0;
1226                 for (size_t i = 0; i < size; ++i) {
1227                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1228                 }
1229         }
1230         char    buf[128];
1231         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1232         tarval *tv = new_tarval_from_str(buf, len, mode);
1233
1234         return new_d_Const(dbgi, tv);
1235 }
1236
1237 /**
1238  * Creates a Const node representing a wide character constant.
1239  */
1240 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1241 {
1242         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1243         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1244
1245         long long int v = cnst->v.wide_character.begin[0];
1246
1247         char    buf[128];
1248         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1249         tarval *tv = new_tarval_from_str(buf, len, mode);
1250
1251         return new_d_Const(dbgi, tv);
1252 }
1253
1254 /**
1255  * Creates a SymConst for a given entity.
1256  *
1257  * @param dbgi    debug info
1258  * @param mode    the (reference) mode for the SymConst
1259  * @param entity  the entity
1260  */
1261 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1262                               ir_entity *entity)
1263 {
1264         assert(entity != NULL);
1265         union symconst_symbol sym;
1266         sym.entity_p = entity;
1267         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1268 }
1269
1270 /**
1271  * Creates a SymConst node representing a string constant.
1272  *
1273  * @param src_pos    the source position of the string constant
1274  * @param id_prefix  a prefix for the name of the generated string constant
1275  * @param value      the value of the string constant
1276  */
1277 static ir_node *string_to_firm(const source_position_t *const src_pos,
1278                                const char *const id_prefix,
1279                                const string_t *const value)
1280 {
1281         ir_type  *const global_type = get_glob_type();
1282         dbg_info *const dbgi        = get_dbg_info(src_pos);
1283         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1284                                                        ir_type_const_char, dbgi);
1285
1286         ident     *const id     = id_unique(id_prefix);
1287         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1288         set_entity_ld_ident(entity, id);
1289         set_entity_variability(entity, variability_constant);
1290         set_entity_allocation(entity, allocation_static);
1291
1292         ir_type *const elem_type = ir_type_const_char;
1293         ir_mode *const mode      = get_type_mode(elem_type);
1294
1295         const char* const string = value->begin;
1296         const size_t      slen   = value->size;
1297
1298         set_array_lower_bound_int(type, 0, 0);
1299         set_array_upper_bound_int(type, 0, slen);
1300         set_type_size_bytes(type, slen);
1301         set_type_state(type, layout_fixed);
1302
1303         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1304         for (size_t i = 0; i < slen; ++i) {
1305                 tvs[i] = new_tarval_from_long(string[i], mode);
1306         }
1307
1308         set_array_entity_values(entity, tvs, slen);
1309         free(tvs);
1310
1311         return create_symconst(dbgi, mode_P_data, entity);
1312 }
1313
1314 /**
1315  * Creates a SymConst node representing a string literal.
1316  *
1317  * @param literal   the string literal
1318  */
1319 static ir_node *string_literal_to_firm(
1320                 const string_literal_expression_t* literal)
1321 {
1322         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1323                               &literal->value);
1324 }
1325
1326 /**
1327  * Creates a SymConst node representing a wide string literal.
1328  *
1329  * @param literal   the wide string literal
1330  */
1331 static ir_node *wide_string_literal_to_firm(
1332         const wide_string_literal_expression_t* const literal)
1333 {
1334         ir_type *const global_type = get_glob_type();
1335         ir_type *const elem_type   = ir_type_wchar_t;
1336         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1337         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1338                                                     elem_type, dbgi);
1339
1340         ident     *const id     = id_unique("Lstr.%u");
1341         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1342         set_entity_ld_ident(entity, id);
1343         set_entity_variability(entity, variability_constant);
1344         set_entity_allocation(entity, allocation_static);
1345
1346         ir_mode *const mode      = get_type_mode(elem_type);
1347
1348         const wchar_rep_t *const string = literal->value.begin;
1349         const size_t             slen   = literal->value.size;
1350
1351         set_array_lower_bound_int(type, 0, 0);
1352         set_array_upper_bound_int(type, 0, slen);
1353         set_type_size_bytes(type, slen);
1354         set_type_state(type, layout_fixed);
1355
1356         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1357         for (size_t i = 0; i < slen; ++i) {
1358                 tvs[i] = new_tarval_from_long(string[i], mode);
1359         }
1360
1361         set_array_entity_values(entity, tvs, slen);
1362         free(tvs);
1363
1364         return create_symconst(dbgi, mode_P_data, entity);
1365 }
1366
1367 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1368                                       ir_node *const addr)
1369 {
1370         ir_type *irtype = get_ir_type(type);
1371         if (is_compound_type(irtype)
1372                         || is_Method_type(irtype)
1373                         || is_Array_type(irtype)) {
1374                 return addr;
1375         }
1376
1377         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1378                                   ? cons_volatile : cons_none;
1379         ir_mode *const mode     = get_type_mode(irtype);
1380         ir_node *const memory   = get_store();
1381         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1382         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1383         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1384
1385         set_store(load_mem);
1386
1387         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1388         return create_conv(dbgi, load_res, mode_arithmetic);
1389 }
1390
1391 /**
1392  * Creates a strict Conv if necessary.
1393  */
1394 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1395 {
1396         ir_mode *mode = get_irn_mode(node);
1397
1398         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1399                 return node;
1400         if (!mode_is_float(mode))
1401                 return node;
1402
1403         /* check if there is already a Conv */
1404         if (is_Conv(node)) {
1405                 /* convert it into a strict Conv */
1406                 set_Conv_strict(node, 1);
1407                 return node;
1408         }
1409
1410         /* otherwise create a new one */
1411         return new_d_strictConv(dbgi, node, mode);
1412 }
1413
1414 static ir_node *get_global_var_address(dbg_info *const dbgi,
1415                                        const entity_t *const entity)
1416 {
1417         assert(entity->kind == ENTITY_VARIABLE);
1418         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1419
1420         ir_entity *const irentity = entity->variable.v.entity;
1421         if (entity->variable.thread_local) {
1422                 ir_node *const no_mem = new_NoMem();
1423                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1424                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1425         } else {
1426                 return create_symconst(dbgi, mode_P_data, irentity);
1427         }
1428 }
1429
1430 /**
1431  * Returns the correct base address depending on whether it is a parameter or a
1432  * normal local variable.
1433  */
1434 static ir_node *get_local_frame(ir_entity *const ent)
1435 {
1436         ir_graph      *const irg   = current_ir_graph;
1437         const ir_type *const owner = get_entity_owner(ent);
1438         if (owner == get_irg_frame_type(irg)) {
1439                 return get_irg_frame(irg);
1440         } else {
1441                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1442                 return get_irg_value_param_base(irg);
1443         }
1444 }
1445
1446 /**
1447  * Keep all memory edges of the given block.
1448  */
1449 static void keep_all_memory(ir_node *block)
1450 {
1451         ir_node *old = get_cur_block();
1452
1453         set_cur_block(block);
1454         keep_alive(get_store());
1455         /* TODO: keep all memory edges from restricted pointers */
1456         set_cur_block(old);
1457 }
1458
1459 static ir_node *reference_expression_enum_value_to_firm(
1460                 const reference_expression_t *ref)
1461 {
1462         entity_t *entity = ref->entity;
1463         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1464         /* make sure the type is constructed */
1465         (void) get_ir_type(type);
1466
1467         return new_Const(entity->enum_value.tv);
1468 }
1469
1470 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1471 {
1472         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1473         entity_t *entity = ref->entity;
1474         assert(is_declaration(entity));
1475         type_t   *type   = skip_typeref(entity->declaration.type);
1476
1477         /* make sure the type is constructed */
1478         (void) get_ir_type(type);
1479
1480         switch ((declaration_kind_t) entity->declaration.kind) {
1481         case DECLARATION_KIND_UNKNOWN:
1482                 break;
1483
1484         case DECLARATION_KIND_LOCAL_VARIABLE: {
1485                 ir_mode *const mode  = get_ir_mode_storage(type);
1486                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1487                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1488         }
1489         case DECLARATION_KIND_PARAMETER: {
1490                 ir_mode *const mode  = get_ir_mode_storage(type);
1491                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1492                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1493         }
1494         case DECLARATION_KIND_FUNCTION: {
1495                 ir_mode *const mode = get_ir_mode_storage(type);
1496                 return create_symconst(dbgi, mode, entity->function.entity);
1497         }
1498         case DECLARATION_KIND_INNER_FUNCTION: {
1499                 ir_mode *const mode = get_ir_mode_storage(type);
1500                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1501                         /* inner function not using the closure */
1502                         return create_symconst(dbgi, mode, entity->function.entity);
1503                 } else {
1504                         /* TODO: need trampoline here */
1505                         panic("Trampoline code not implemented");
1506                         return create_symconst(dbgi, mode, entity->function.entity);
1507                 }
1508         }
1509         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1510                 ir_node *const addr = get_global_var_address(dbgi, entity);
1511                 return deref_address(dbgi, entity->declaration.type, addr);
1512         }
1513
1514         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1515                 ir_entity *irentity = entity->variable.v.entity;
1516                 ir_node   *frame    = get_local_frame(irentity);
1517                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1518                 return deref_address(dbgi, entity->declaration.type, sel);
1519         }
1520         case DECLARATION_KIND_PARAMETER_ENTITY: {
1521                 ir_entity *irentity = entity->parameter.v.entity;
1522                 ir_node   *frame    = get_local_frame(irentity);
1523                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1524                 return deref_address(dbgi, entity->declaration.type, sel);
1525         }
1526
1527         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1528                 return entity->variable.v.vla_base;
1529
1530         case DECLARATION_KIND_COMPOUND_MEMBER:
1531                 panic("not implemented reference type");
1532         }
1533
1534         panic("reference to declaration with unknown type found");
1535 }
1536
1537 static ir_node *reference_addr(const reference_expression_t *ref)
1538 {
1539         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1540         entity_t *entity = ref->entity;
1541         assert(is_declaration(entity));
1542
1543         switch((declaration_kind_t) entity->declaration.kind) {
1544         case DECLARATION_KIND_UNKNOWN:
1545                 break;
1546         case DECLARATION_KIND_PARAMETER:
1547         case DECLARATION_KIND_LOCAL_VARIABLE:
1548                 /* you can store to a local variable (so we don't panic but return NULL
1549                  * as an indicator for no real address) */
1550                 return NULL;
1551         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1552                 ir_node *const addr = get_global_var_address(dbgi, entity);
1553                 return addr;
1554         }
1555         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1556                 ir_entity *irentity = entity->variable.v.entity;
1557                 ir_node   *frame    = get_local_frame(irentity);
1558                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1559
1560                 return sel;
1561         }
1562         case DECLARATION_KIND_PARAMETER_ENTITY: {
1563                 ir_entity *irentity = entity->parameter.v.entity;
1564                 ir_node   *frame    = get_local_frame(irentity);
1565                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1566
1567                 return sel;
1568         }
1569
1570         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1571                 return entity->variable.v.vla_base;
1572
1573         case DECLARATION_KIND_FUNCTION: {
1574                 type_t  *const type = skip_typeref(entity->declaration.type);
1575                 ir_mode *const mode = get_ir_mode_storage(type);
1576                 return create_symconst(dbgi, mode, entity->function.entity);
1577         }
1578
1579         case DECLARATION_KIND_INNER_FUNCTION:
1580         case DECLARATION_KIND_COMPOUND_MEMBER:
1581                 panic("not implemented reference type");
1582         }
1583
1584         panic("reference to declaration with unknown type found");
1585 }
1586
1587 /**
1588  * Transform calls to builtin functions.
1589  */
1590 static ir_node *process_builtin_call(const call_expression_t *call)
1591 {
1592         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1593
1594         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1595         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1596
1597         type_t *type = skip_typeref(builtin->base.type);
1598         assert(is_type_pointer(type));
1599
1600         type_t   *function_type = skip_typeref(type->pointer.points_to);
1601         symbol_t *symbol        = builtin->symbol;
1602
1603         switch(symbol->ID) {
1604         case T___builtin_alloca: {
1605                 if (call->arguments == NULL || call->arguments->next != NULL) {
1606                         panic("invalid number of parameters on __builtin_alloca");
1607                 }
1608                 expression_t *argument = call->arguments->expression;
1609                 ir_node      *size     = expression_to_firm(argument);
1610
1611                 ir_node *store  = get_store();
1612                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1613                                               stack_alloc);
1614                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1615                 set_store(proj_m);
1616                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1617
1618                 return res;
1619         }
1620
1621         case T___builtin_huge_val:
1622         case T___builtin_inf:
1623         case T___builtin_inff:
1624         case T___builtin_infl: {
1625                 type_t  *type = function_type->function.return_type;
1626                 ir_mode *mode = get_ir_mode_arithmetic(type);
1627                 tarval  *tv   = get_mode_infinite(mode);
1628                 ir_node *res  = new_d_Const(dbgi, tv);
1629                 return   res;
1630         }
1631         case T___builtin_nan:
1632         case T___builtin_nanf:
1633         case T___builtin_nanl: {
1634                 /* Ignore string for now... */
1635                 assert(is_type_function(function_type));
1636                 type_t  *type = function_type->function.return_type;
1637                 ir_mode *mode = get_ir_mode_arithmetic(type);
1638                 tarval  *tv   = get_mode_NAN(mode);
1639                 ir_node *res  = new_d_Const(dbgi, tv);
1640                 return res;
1641         }
1642         case T___builtin_expect: {
1643                 expression_t *argument = call->arguments->expression;
1644                 return _expression_to_firm(argument);
1645         }
1646         case T___builtin_va_end:
1647                 /* evaluate the argument of va_end for its side effects */
1648                 _expression_to_firm(call->arguments->expression);
1649                 return NULL;
1650         case T___builtin_frame_address: {
1651                 expression_t *const expression = call->arguments->expression;
1652                 long val = fold_constant(expression);
1653                 if (val == 0) {
1654                         /* the nice case */
1655                         return get_irg_frame(current_ir_graph);
1656                 } else {
1657                         /* get the argument */
1658                         ir_node *in[2];
1659
1660                         in[0] = _expression_to_firm(expression);
1661                         in[1] = get_irg_frame(current_ir_graph);
1662                         ir_type *tp  = get_ir_type((type_t*) function_type);
1663                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_frame_addess, 2, in, tp);
1664                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1665                 }
1666         }
1667         case T___builtin_return_address: {
1668                 expression_t *const expression = call->arguments->expression;
1669                 ir_node *in[2];
1670
1671                 in[0] = _expression_to_firm(expression);
1672                 in[1] = get_irg_frame(current_ir_graph);
1673                 ir_type *tp  = get_ir_type((type_t*) function_type);
1674                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_return_address, 2, in, tp);
1675                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1676         }
1677
1678         default:
1679                 panic("unsupported builtin found");
1680         }
1681 }
1682
1683 /**
1684  * Transform a call expression.
1685  * Handles some special cases, like alloca() calls, which must be resolved
1686  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1687  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1688  * handled right...
1689  */
1690 static ir_node *call_expression_to_firm(const call_expression_t *call)
1691 {
1692         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1693         assert(get_cur_block() != NULL);
1694
1695         expression_t *function = call->function;
1696         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1697                 return process_builtin_call(call);
1698         }
1699         if (function->kind == EXPR_REFERENCE) {
1700                 const reference_expression_t *ref    = &function->reference;
1701                 entity_t                     *entity = ref->entity;
1702
1703                 if (entity->kind == ENTITY_FUNCTION
1704                                 && entity->function.entity == rts_entities[rts_alloca]) {
1705                         /* handle alloca() call */
1706                         expression_t *argument = call->arguments->expression;
1707                         ir_node      *size     = expression_to_firm(argument);
1708                         ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1709
1710                         size = create_conv(dbgi, size, mode);
1711
1712                         ir_node  *store  = get_store();
1713                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1714                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1715                                                        stack_alloc);
1716                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1717                         set_store(proj_m);
1718                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1719
1720                         return res;
1721                 }
1722         }
1723         ir_node *callee = expression_to_firm(function);
1724
1725         type_t *type = skip_typeref(function->base.type);
1726         assert(is_type_pointer(type));
1727         pointer_type_t *pointer_type = &type->pointer;
1728         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1729         assert(is_type_function(points_to));
1730         function_type_t *function_type = &points_to->function;
1731
1732         int      n_parameters = 0;
1733         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1734         ir_type *new_method_type = NULL;
1735         if (function_type->variadic || function_type->unspecified_parameters) {
1736                 const call_argument_t *argument = call->arguments;
1737                 for ( ; argument != NULL; argument = argument->next) {
1738                         ++n_parameters;
1739                 }
1740
1741                 /* we need to construct a new method type matching the call
1742                  * arguments... */
1743                 int n_res       = get_method_n_ress(ir_method_type);
1744                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1745                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1746                                                     n_parameters, n_res, dbgi);
1747                 set_method_calling_convention(new_method_type,
1748                                get_method_calling_convention(ir_method_type));
1749                 set_method_additional_properties(new_method_type,
1750                                get_method_additional_properties(ir_method_type));
1751                 set_method_variadicity(new_method_type,
1752                                        get_method_variadicity(ir_method_type));
1753
1754                 for (int i = 0; i < n_res; ++i) {
1755                         set_method_res_type(new_method_type, i,
1756                                             get_method_res_type(ir_method_type, i));
1757                 }
1758                 argument = call->arguments;
1759                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1760                         expression_t *expression = argument->expression;
1761                         ir_type      *irtype     = get_ir_type(expression->base.type);
1762                         set_method_param_type(new_method_type, i, irtype);
1763                 }
1764                 ir_method_type = new_method_type;
1765         } else {
1766                 n_parameters = get_method_n_params(ir_method_type);
1767         }
1768
1769         ir_node *in[n_parameters];
1770
1771         const call_argument_t *argument = call->arguments;
1772         for (int n = 0; n < n_parameters; ++n) {
1773                 expression_t *expression = argument->expression;
1774                 ir_node      *arg_node   = expression_to_firm(expression);
1775
1776                 type_t  *type = skip_typeref(expression->base.type);
1777                 if (!is_type_compound(type)) {
1778                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1779                         arg_node      = create_conv(dbgi, arg_node, mode);
1780                         arg_node      = do_strict_conv(dbgi, arg_node);
1781                 }
1782
1783                 in[n] = arg_node;
1784
1785                 argument = argument->next;
1786         }
1787
1788         ir_node  *store = get_store();
1789         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1790                                      ir_method_type);
1791         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1792         set_store(mem);
1793
1794         type_t  *return_type = skip_typeref(function_type->return_type);
1795         ir_node *result      = NULL;
1796
1797         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1798                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1799
1800                 if (is_type_scalar(return_type)) {
1801                         ir_mode *mode       = get_ir_mode_storage(return_type);
1802                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1803                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1804                         result              = create_conv(NULL, result, mode_arith);
1805                 } else {
1806                         ir_mode *mode = mode_P_data;
1807                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1808                 }
1809         }
1810
1811         if (function->kind == EXPR_REFERENCE &&
1812             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1813                 /* A dead end:  Keep the Call and the Block.  Also place all further
1814                  * nodes into a new and unreachable block. */
1815                 keep_alive(node);
1816                 keep_alive(get_cur_block());
1817                 new_Block(0, NULL);
1818         }
1819
1820         return result;
1821 }
1822
1823 static void statement_to_firm(statement_t *statement);
1824 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1825
1826 static ir_node *expression_to_addr(const expression_t *expression);
1827 static ir_node *create_condition_evaluation(const expression_t *expression,
1828                                             ir_node *true_block,
1829                                             ir_node *false_block);
1830
1831 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1832                          ir_node *value)
1833 {
1834         if (!is_type_compound(type)) {
1835                 ir_mode *mode = get_ir_mode_storage(type);
1836                 value         = create_conv(dbgi, value, mode);
1837                 value         = do_strict_conv(dbgi, value);
1838         }
1839
1840         ir_node *memory = get_store();
1841
1842         if (is_type_scalar(type)) {
1843                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1844                                       ? cons_volatile : cons_none;
1845                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1846                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1847                 set_store(store_mem);
1848         } else {
1849                 ir_type *irtype    = get_ir_type(type);
1850                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1851                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1852                 set_store(copyb_mem);
1853         }
1854 }
1855
1856 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1857 {
1858         tarval *all_one   = get_mode_all_one(mode);
1859         int     mode_size = get_mode_size_bits(mode);
1860
1861         assert(offset >= 0);
1862         assert(size   >= 0);
1863         assert(offset + size <= mode_size);
1864         if (size == mode_size) {
1865                 return all_one;
1866         }
1867
1868         long    shiftr    = get_mode_size_bits(mode) - size;
1869         long    shiftl    = offset;
1870         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1871         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1872         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1873         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1874
1875         return mask1;
1876 }
1877
1878 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1879                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1880 {
1881         ir_type *entity_type = get_entity_type(entity);
1882         ir_type *base_type   = get_primitive_base_type(entity_type);
1883         assert(base_type != NULL);
1884         ir_mode *mode        = get_type_mode(base_type);
1885
1886         value = create_conv(dbgi, value, mode);
1887
1888         /* kill upper bits of value and shift to right position */
1889         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1890         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1891
1892         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1893         ir_node *mask_node       = new_d_Const(dbgi, mask);
1894         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1895         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1896         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
1897         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1898
1899         /* load current value */
1900         ir_node  *mem             = get_store();
1901         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
1902                                         set_volatile ? cons_volatile : cons_none);
1903         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1904         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1905         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1906         tarval   *inv_mask        = tarval_not(shift_mask);
1907         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1908         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1909
1910         /* construct new value and store */
1911         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1912         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1913                                          set_volatile ? cons_volatile : cons_none);
1914         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1915         set_store(store_mem);
1916
1917         return value_masked;
1918 }
1919
1920 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1921                 ir_node *addr)
1922 {
1923         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1924         type_t   *type     = expression->base.type;
1925         ir_mode  *mode     = get_ir_mode_storage(type);
1926         ir_node  *mem      = get_store();
1927         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
1928         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1929         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1930
1931         load_res           = create_conv(dbgi, load_res, mode_int);
1932
1933         set_store(load_mem);
1934
1935         /* kill upper bits */
1936         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1937         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1938         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1939         ir_type   *entity_type  = get_entity_type(entity);
1940         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1941         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1942         assert(shift_bitsl >= 0);
1943         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1944         ir_node   *countl       = new_d_Const(dbgi, tvl);
1945         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1946
1947         long       shift_bitsr  = bitoffset + shift_bitsl;
1948         assert(shift_bitsr <= (long) machine_size);
1949         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1950         ir_node   *countr       = new_d_Const(dbgi, tvr);
1951         ir_node   *shiftr;
1952         if (mode_is_signed(mode)) {
1953                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1954         } else {
1955                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1956         }
1957
1958         return create_conv(dbgi, shiftr, mode);
1959 }
1960
1961 /* make sure the selected compound type is constructed */
1962 static void construct_select_compound(const select_expression_t *expression)
1963 {
1964         type_t *type = skip_typeref(expression->compound->base.type);
1965         if (is_type_pointer(type)) {
1966                 type = type->pointer.points_to;
1967         }
1968         (void) get_ir_type(type);
1969 }
1970
1971 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1972                                               ir_node *value, ir_node *addr)
1973 {
1974         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1975         type_t   *type = skip_typeref(expression->base.type);
1976
1977         if (!is_type_compound(type)) {
1978                 ir_mode  *mode = get_ir_mode_storage(type);
1979                 value          = create_conv(dbgi, value, mode);
1980                 value          = do_strict_conv(dbgi, value);
1981         }
1982
1983         if (expression->kind == EXPR_REFERENCE) {
1984                 const reference_expression_t *ref = &expression->reference;
1985
1986                 entity_t *entity = ref->entity;
1987                 assert(is_declaration(entity));
1988                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1989                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1990                         set_value(entity->variable.v.value_number, value);
1991                         return value;
1992                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1993                         set_value(entity->parameter.v.value_number, value);
1994                         return value;
1995                 }
1996         }
1997
1998         if (addr == NULL)
1999                 addr = expression_to_addr(expression);
2000         assert(addr != NULL);
2001
2002         if (expression->kind == EXPR_SELECT) {
2003                 const select_expression_t *select = &expression->select;
2004
2005                 construct_select_compound(select);
2006
2007                 entity_t *entity = select->compound_entry;
2008                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2009                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2010                         ir_entity *irentity = entity->compound_member.entity;
2011                         bool       set_volatile
2012                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2013                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2014                                                        set_volatile);
2015                         return value;
2016                 }
2017         }
2018
2019         assign_value(dbgi, addr, type, value);
2020         return value;
2021 }
2022
2023 static void set_value_for_expression(const expression_t *expression,
2024                                      ir_node *value)
2025 {
2026         set_value_for_expression_addr(expression, value, NULL);
2027 }
2028
2029 static ir_node *get_value_from_lvalue(const expression_t *expression,
2030                                       ir_node *addr)
2031 {
2032         if (expression->kind == EXPR_REFERENCE) {
2033                 const reference_expression_t *ref = &expression->reference;
2034
2035                 entity_t *entity = ref->entity;
2036                 assert(entity->kind == ENTITY_VARIABLE
2037                                 || entity->kind == ENTITY_PARAMETER);
2038                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2039                 int value_number;
2040                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2041                         value_number = entity->variable.v.value_number;
2042                         assert(addr == NULL);
2043                         type_t  *type = skip_typeref(expression->base.type);
2044                         ir_mode *mode = get_ir_mode_storage(type);
2045                         ir_node *res  = get_value(value_number, mode);
2046                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2047                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2048                         value_number = entity->parameter.v.value_number;
2049                         assert(addr == NULL);
2050                         type_t  *type = skip_typeref(expression->base.type);
2051                         ir_mode *mode = get_ir_mode_storage(type);
2052                         ir_node *res  = get_value(value_number, mode);
2053                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2054                 }
2055         }
2056
2057         assert(addr != NULL);
2058         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2059
2060         ir_node *value;
2061         if (expression->kind == EXPR_SELECT &&
2062             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2063             construct_select_compound(&expression->select);
2064                 value = bitfield_extract_to_firm(&expression->select, addr);
2065         } else {
2066                 value = deref_address(dbgi, expression->base.type, addr);
2067         }
2068
2069         return value;
2070 }
2071
2072
2073 static ir_node *create_incdec(const unary_expression_t *expression)
2074 {
2075         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2076         const expression_t *value_expr = expression->value;
2077         ir_node            *addr       = expression_to_addr(value_expr);
2078         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2079
2080         type_t  *type = skip_typeref(expression->base.type);
2081         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2082
2083         ir_node *offset;
2084         if (is_type_pointer(type)) {
2085                 pointer_type_t *pointer_type = &type->pointer;
2086                 offset                       = get_type_size(pointer_type->points_to);
2087         } else {
2088                 assert(is_type_arithmetic(type));
2089                 offset = new_Const(get_mode_one(mode));
2090         }
2091
2092         ir_node *result;
2093         ir_node *store_value;
2094         switch(expression->base.kind) {
2095         case EXPR_UNARY_POSTFIX_INCREMENT:
2096                 result      = value;
2097                 store_value = new_d_Add(dbgi, value, offset, mode);
2098                 break;
2099         case EXPR_UNARY_POSTFIX_DECREMENT:
2100                 result      = value;
2101                 store_value = new_d_Sub(dbgi, value, offset, mode);
2102                 break;
2103         case EXPR_UNARY_PREFIX_INCREMENT:
2104                 result      = new_d_Add(dbgi, value, offset, mode);
2105                 store_value = result;
2106                 break;
2107         case EXPR_UNARY_PREFIX_DECREMENT:
2108                 result      = new_d_Sub(dbgi, value, offset, mode);
2109                 store_value = result;
2110                 break;
2111         default:
2112                 panic("no incdec expr in create_incdec");
2113         }
2114
2115         set_value_for_expression_addr(value_expr, store_value, addr);
2116
2117         return result;
2118 }
2119
2120 static bool is_local_variable(expression_t *expression)
2121 {
2122         if (expression->kind != EXPR_REFERENCE)
2123                 return false;
2124         reference_expression_t *ref_expr = &expression->reference;
2125         entity_t               *entity   = ref_expr->entity;
2126         if (entity->kind != ENTITY_VARIABLE)
2127                 return false;
2128         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2129         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2130 }
2131
2132 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2133 {
2134         switch(kind) {
2135         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2136         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2137         case EXPR_BINARY_NOTEQUAL:
2138                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2139         case EXPR_BINARY_ISLESS:
2140         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2141         case EXPR_BINARY_ISLESSEQUAL:
2142         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2143         case EXPR_BINARY_ISGREATER:
2144         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2145         case EXPR_BINARY_ISGREATEREQUAL:
2146         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2147         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2148
2149         default:
2150                 break;
2151         }
2152         panic("trying to get pn_Cmp from non-comparison binexpr type");
2153 }
2154
2155 /**
2156  * Handle the assume optimizer hint: check if a Confirm
2157  * node can be created.
2158  *
2159  * @param dbi    debug info
2160  * @param expr   the IL assume expression
2161  *
2162  * we support here only some simple cases:
2163  *  - var rel const
2164  *  - const rel val
2165  *  - var rel var
2166  */
2167 static ir_node *handle_assume_compare(dbg_info *dbi,
2168                                       const binary_expression_t *expression)
2169 {
2170         expression_t *op1 = expression->left;
2171         expression_t *op2 = expression->right;
2172         entity_t     *var2, *var = NULL;
2173         ir_node      *res = NULL;
2174         pn_Cmp        cmp_val;
2175
2176         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2177
2178         if (is_local_variable(op1) && is_local_variable(op2)) {
2179         var  = op1->reference.entity;
2180             var2 = op2->reference.entity;
2181
2182                 type_t  *const type = skip_typeref(var->declaration.type);
2183                 ir_mode *const mode = get_ir_mode_storage(type);
2184
2185                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2186                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2187
2188                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2189                 set_value(var2->variable.v.value_number, res);
2190
2191                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2192                 set_value(var->variable.v.value_number, res);
2193
2194                 return res;
2195         }
2196
2197         expression_t *con;
2198         if (is_local_variable(op1) && is_constant_expression(op2)) {
2199                 var = op1->reference.entity;
2200                 con = op2;
2201         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2202                 cmp_val = get_inversed_pnc(cmp_val);
2203                 var = op2->reference.entity;
2204                 con = op1;
2205         }
2206
2207         if (var != NULL) {
2208                 type_t  *const type = skip_typeref(var->declaration.type);
2209                 ir_mode *const mode = get_ir_mode_storage(type);
2210
2211                 res = get_value(var->variable.v.value_number, mode);
2212                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2213                 set_value(var->variable.v.value_number, res);
2214         }
2215         return res;
2216 }
2217
2218 /**
2219  * Handle the assume optimizer hint.
2220  *
2221  * @param dbi    debug info
2222  * @param expr   the IL assume expression
2223  */
2224 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2225 {
2226         switch(expression->kind) {
2227         case EXPR_BINARY_EQUAL:
2228         case EXPR_BINARY_NOTEQUAL:
2229         case EXPR_BINARY_LESS:
2230         case EXPR_BINARY_LESSEQUAL:
2231         case EXPR_BINARY_GREATER:
2232         case EXPR_BINARY_GREATEREQUAL:
2233                 return handle_assume_compare(dbi, &expression->binary);
2234         default:
2235                 return NULL;
2236         }
2237 }
2238
2239 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2240 {
2241         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2242         type_t   *type = skip_typeref(expression->base.type);
2243
2244         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2245                 return expression_to_addr(expression->value);
2246
2247         const expression_t *value = expression->value;
2248
2249         switch(expression->base.kind) {
2250         case EXPR_UNARY_NEGATE: {
2251                 ir_node *value_node = expression_to_firm(value);
2252                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2253                 return new_d_Minus(dbgi, value_node, mode);
2254         }
2255         case EXPR_UNARY_PLUS:
2256                 return expression_to_firm(value);
2257         case EXPR_UNARY_BITWISE_NEGATE: {
2258                 ir_node *value_node = expression_to_firm(value);
2259                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2260                 return new_d_Not(dbgi, value_node, mode);
2261         }
2262         case EXPR_UNARY_NOT: {
2263                 ir_node *value_node = _expression_to_firm(value);
2264                 value_node          = create_conv(dbgi, value_node, mode_b);
2265                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2266                 return res;
2267         }
2268         case EXPR_UNARY_DEREFERENCE: {
2269                 ir_node *value_node = expression_to_firm(value);
2270                 type_t  *value_type = skip_typeref(value->base.type);
2271                 assert(is_type_pointer(value_type));
2272                 type_t  *points_to  = value_type->pointer.points_to;
2273                 return deref_address(dbgi, points_to, value_node);
2274         }
2275         case EXPR_UNARY_POSTFIX_INCREMENT:
2276         case EXPR_UNARY_POSTFIX_DECREMENT:
2277         case EXPR_UNARY_PREFIX_INCREMENT:
2278         case EXPR_UNARY_PREFIX_DECREMENT:
2279                 return create_incdec(expression);
2280         case EXPR_UNARY_CAST: {
2281                 ir_node *value_node = expression_to_firm(value);
2282                 if (is_type_scalar(type)) {
2283                         ir_mode *mode       = get_ir_mode_storage(type);
2284                         ir_node *node       = create_conv(dbgi, value_node, mode);
2285                         node                = do_strict_conv(dbgi, node);
2286                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2287                         node                = create_conv(dbgi, node, mode_arith);
2288                         return node;
2289                 } else {
2290                         /* make sure firm type is constructed */
2291                         (void) get_ir_type(type);
2292                         return value_node;
2293                 }
2294         }
2295         case EXPR_UNARY_CAST_IMPLICIT: {
2296                 ir_node *value_node = expression_to_firm(value);
2297                 if (is_type_scalar(type)) {
2298                         ir_mode *mode       = get_ir_mode_storage(type);
2299                         ir_node *res        = create_conv(dbgi, value_node, mode);
2300                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2301                         res                 = create_conv(dbgi, res, mode_arith);
2302                         return res;
2303                 } else {
2304                         return value_node;
2305                 }
2306         }
2307         case EXPR_UNARY_ASSUME:
2308                 if (firm_opt.confirm)
2309                         return handle_assume(dbgi, value);
2310                 else
2311                         return NULL;
2312
2313         default:
2314                 break;
2315         }
2316         panic("invalid UNEXPR type found");
2317 }
2318
2319 /**
2320  * produces a 0/1 depending of the value of a mode_b node
2321  */
2322 static ir_node *produce_condition_result(const expression_t *expression,
2323                                          ir_mode *mode, dbg_info *dbgi)
2324 {
2325         ir_node *cur_block = get_cur_block();
2326
2327         ir_node *one_block = new_immBlock();
2328         set_cur_block(one_block);
2329         ir_node *one       = new_Const(get_mode_one(mode));
2330         ir_node *jmp_one   = new_d_Jmp(dbgi);
2331
2332         ir_node *zero_block = new_immBlock();
2333         set_cur_block(zero_block);
2334         ir_node *zero       = new_Const(get_mode_null(mode));
2335         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2336
2337         set_cur_block(cur_block);
2338         create_condition_evaluation(expression, one_block, zero_block);
2339         mature_immBlock(one_block);
2340         mature_immBlock(zero_block);
2341
2342         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2343         new_Block(2, in_cf);
2344
2345         ir_node *in[2] = { one, zero };
2346         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2347
2348         return val;
2349 }
2350
2351 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2352                 ir_node *value, type_t *type)
2353 {
2354         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2355         assert(is_type_pointer(type));
2356         pointer_type_t *const pointer_type = &type->pointer;
2357         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2358         unsigned              elem_size    = get_type_size_const(points_to);
2359
2360         value = create_conv(dbgi, value, mode);
2361
2362         /* gcc extension: allow arithmetic with void * and function * */
2363         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2364             is_type_function(points_to))  {
2365                 elem_size = 1;
2366         }
2367
2368         assert(elem_size >= 1);
2369         if (elem_size == 1)
2370                 return value;
2371
2372         ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2373         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode);
2374         return mul;
2375 }
2376
2377 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2378                           ir_node *left, ir_node *right)
2379 {
2380         ir_mode  *mode;
2381         type_t   *type_left  = skip_typeref(expression->left->base.type);
2382         type_t   *type_right = skip_typeref(expression->right->base.type);
2383
2384         expression_kind_t kind = expression->base.kind;
2385
2386         switch (kind) {
2387         case EXPR_BINARY_SHIFTLEFT:
2388         case EXPR_BINARY_SHIFTRIGHT:
2389         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2390         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2391                 mode  = get_irn_mode(left);
2392                 right = create_conv(dbgi, right, mode_uint);
2393                 break;
2394
2395         case EXPR_BINARY_SUB:
2396                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2397                         const pointer_type_t *const ptr_type = &type_left->pointer;
2398
2399                         mode = get_ir_mode_arithmetic(expression->base.type);
2400                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2401                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2402                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2403                         ir_node *const no_mem    = new_NoMem();
2404                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2405                                                                                                    mode, op_pin_state_floats);
2406                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2407                 }
2408                 /* fallthrough */
2409         case EXPR_BINARY_SUB_ASSIGN:
2410                 if (is_type_pointer(type_left)) {
2411                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2412                         mode  = get_ir_mode_arithmetic(type_left);
2413                         break;
2414                 }
2415                 goto normal_node;
2416
2417         case EXPR_BINARY_ADD:
2418         case EXPR_BINARY_ADD_ASSIGN:
2419                 if (is_type_pointer(type_left)) {
2420                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2421                         mode  = get_ir_mode_arithmetic(type_left);
2422                         break;
2423                 } else if (is_type_pointer(type_right)) {
2424                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2425                         mode  = get_ir_mode_arithmetic(type_right);
2426                         break;
2427                 }
2428                 goto normal_node;
2429
2430         default:
2431 normal_node:
2432                 mode = get_ir_mode_arithmetic(type_right);
2433                 left = create_conv(dbgi, left, mode);
2434                 break;
2435         }
2436
2437         switch (kind) {
2438         case EXPR_BINARY_ADD_ASSIGN:
2439         case EXPR_BINARY_ADD:
2440                 return new_d_Add(dbgi, left, right, mode);
2441         case EXPR_BINARY_SUB_ASSIGN:
2442         case EXPR_BINARY_SUB:
2443                 return new_d_Sub(dbgi, left, right, mode);
2444         case EXPR_BINARY_MUL_ASSIGN:
2445         case EXPR_BINARY_MUL:
2446                 return new_d_Mul(dbgi, left, right, mode);
2447         case EXPR_BINARY_BITWISE_AND:
2448         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2449                 return new_d_And(dbgi, left, right, mode);
2450         case EXPR_BINARY_BITWISE_OR:
2451         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2452                 return new_d_Or(dbgi, left, right, mode);
2453         case EXPR_BINARY_BITWISE_XOR:
2454         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2455                 return new_d_Eor(dbgi, left, right, mode);
2456         case EXPR_BINARY_SHIFTLEFT:
2457         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2458                 return new_d_Shl(dbgi, left, right, mode);
2459         case EXPR_BINARY_SHIFTRIGHT:
2460         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2461                 if (mode_is_signed(mode)) {
2462                         return new_d_Shrs(dbgi, left, right, mode);
2463                 } else {
2464                         return new_d_Shr(dbgi, left, right, mode);
2465                 }
2466         case EXPR_BINARY_DIV:
2467         case EXPR_BINARY_DIV_ASSIGN: {
2468                 ir_node *pin = new_Pin(new_NoMem());
2469                 ir_node *op;
2470                 ir_node *res;
2471                 if (mode_is_float(mode)) {
2472                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2473                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2474                 } else {
2475                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2476                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2477                 }
2478                 return res;
2479         }
2480         case EXPR_BINARY_MOD:
2481         case EXPR_BINARY_MOD_ASSIGN: {
2482                 ir_node *pin = new_Pin(new_NoMem());
2483                 assert(!mode_is_float(mode));
2484                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2485                                          op_pin_state_floats);
2486                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2487                 return res;
2488         }
2489         default:
2490                 panic("unexpected expression kind");
2491         }
2492 }
2493
2494 static ir_node *create_lazy_op(const binary_expression_t *expression)
2495 {
2496         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2497         type_t   *type = skip_typeref(expression->base.type);
2498         ir_mode  *mode = get_ir_mode_arithmetic(type);
2499
2500         if (is_constant_expression(expression->left)) {
2501                 long val = fold_constant(expression->left);
2502                 expression_kind_t ekind = expression->base.kind;
2503                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2504                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2505                         if (val == 0) {
2506                                 return new_Const(get_mode_null(mode));
2507                         }
2508                 } else {
2509                         if (val != 0) {
2510                                 return new_Const(get_mode_one(mode));
2511                         }
2512                 }
2513
2514                 if (is_constant_expression(expression->right)) {
2515                         long const valr = fold_constant(expression->right);
2516                         return valr != 0 ?
2517                                 new_Const(get_mode_one(mode)) :
2518                                 new_Const(get_mode_null(mode));
2519                 }
2520
2521                 return produce_condition_result(expression->right, mode, dbgi);
2522         }
2523
2524         return produce_condition_result((const expression_t*) expression, mode,
2525                                         dbgi);
2526 }
2527
2528 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2529                                             ir_node *right, ir_mode *mode);
2530
2531 static ir_node *create_assign_binop(const binary_expression_t *expression)
2532 {
2533         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2534         const expression_t *left_expr = expression->left;
2535         type_t             *type      = skip_typeref(left_expr->base.type);
2536         ir_mode            *left_mode = get_ir_mode_storage(type);
2537         ir_node            *right     = expression_to_firm(expression->right);
2538         ir_node            *left_addr = expression_to_addr(left_expr);
2539         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2540         ir_node            *result    = create_op(dbgi, expression, left, right);
2541
2542         result = create_conv(dbgi, result, left_mode);
2543         result = do_strict_conv(dbgi, result);
2544
2545         result = set_value_for_expression_addr(left_expr, result, left_addr);
2546
2547         if (!is_type_compound(type)) {
2548                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2549                 result = create_conv(dbgi, result, mode_arithmetic);
2550         }
2551         return result;
2552 }
2553
2554 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2555 {
2556         expression_kind_t kind = expression->base.kind;
2557
2558         switch(kind) {
2559         case EXPR_BINARY_EQUAL:
2560         case EXPR_BINARY_NOTEQUAL:
2561         case EXPR_BINARY_LESS:
2562         case EXPR_BINARY_LESSEQUAL:
2563         case EXPR_BINARY_GREATER:
2564         case EXPR_BINARY_GREATEREQUAL:
2565         case EXPR_BINARY_ISGREATER:
2566         case EXPR_BINARY_ISGREATEREQUAL:
2567         case EXPR_BINARY_ISLESS:
2568         case EXPR_BINARY_ISLESSEQUAL:
2569         case EXPR_BINARY_ISLESSGREATER:
2570         case EXPR_BINARY_ISUNORDERED: {
2571                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2572                 ir_node *left  = expression_to_firm(expression->left);
2573                 ir_node *right = expression_to_firm(expression->right);
2574                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2575                 long     pnc   = get_pnc(kind, expression->left->base.type);
2576                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2577                 return proj;
2578         }
2579         case EXPR_BINARY_ASSIGN: {
2580                 ir_node *addr  = expression_to_addr(expression->left);
2581                 ir_node *right = expression_to_firm(expression->right);
2582                 ir_node *res
2583                         = set_value_for_expression_addr(expression->left, right, addr);
2584
2585                 type_t  *type            = skip_typeref(expression->base.type);
2586                 if (!is_type_compound(type)) {
2587                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2588                         res                      = create_conv(NULL, res, mode_arithmetic);
2589                 }
2590                 return res;
2591         }
2592         case EXPR_BINARY_ADD:
2593         case EXPR_BINARY_SUB:
2594         case EXPR_BINARY_MUL:
2595         case EXPR_BINARY_DIV:
2596         case EXPR_BINARY_MOD:
2597         case EXPR_BINARY_BITWISE_AND:
2598         case EXPR_BINARY_BITWISE_OR:
2599         case EXPR_BINARY_BITWISE_XOR:
2600         case EXPR_BINARY_SHIFTLEFT:
2601         case EXPR_BINARY_SHIFTRIGHT:
2602         {
2603                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2604                 ir_node  *left  = expression_to_firm(expression->left);
2605                 ir_node  *right = expression_to_firm(expression->right);
2606                 return create_op(dbgi, expression, left, right);
2607         }
2608         case EXPR_BINARY_LOGICAL_AND:
2609         case EXPR_BINARY_LOGICAL_OR:
2610                 return create_lazy_op(expression);
2611         case EXPR_BINARY_COMMA:
2612                 /* create side effects of left side */
2613                 (void) expression_to_firm(expression->left);
2614                 return _expression_to_firm(expression->right);
2615
2616         case EXPR_BINARY_ADD_ASSIGN:
2617         case EXPR_BINARY_SUB_ASSIGN:
2618         case EXPR_BINARY_MUL_ASSIGN:
2619         case EXPR_BINARY_MOD_ASSIGN:
2620         case EXPR_BINARY_DIV_ASSIGN:
2621         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2622         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2623         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2624         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2625         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2626                 return create_assign_binop(expression);
2627         default:
2628                 panic("TODO binexpr type");
2629         }
2630 }
2631
2632 static ir_node *array_access_addr(const array_access_expression_t *expression)
2633 {
2634         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2635         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2636         ir_node  *offset      = expression_to_firm(expression->index);
2637         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2638         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2639         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2640
2641         return result;
2642 }
2643
2644 static ir_node *array_access_to_firm(
2645                 const array_access_expression_t *expression)
2646 {
2647         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2648         ir_node  *addr   = array_access_addr(expression);
2649         type_t   *type   = revert_automatic_type_conversion(
2650                         (const expression_t*) expression);
2651         type             = skip_typeref(type);
2652
2653         return deref_address(dbgi, type, addr);
2654 }
2655
2656 static long get_offsetof_offset(const offsetof_expression_t *expression)
2657 {
2658         type_t *orig_type = expression->type;
2659         long    offset    = 0;
2660
2661         designator_t *designator = expression->designator;
2662         for ( ; designator != NULL; designator = designator->next) {
2663                 type_t *type = skip_typeref(orig_type);
2664                 /* be sure the type is constructed */
2665                 (void) get_ir_type(type);
2666
2667                 if (designator->symbol != NULL) {
2668                         assert(is_type_compound(type));
2669                         symbol_t *symbol = designator->symbol;
2670
2671                         compound_t *compound = type->compound.compound;
2672                         entity_t   *iter     = compound->members.entities;
2673                         for ( ; iter != NULL; iter = iter->base.next) {
2674                                 if (iter->base.symbol == symbol) {
2675                                         break;
2676                                 }
2677                         }
2678                         assert(iter != NULL);
2679
2680                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2681                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2682                         offset += get_entity_offset(iter->compound_member.entity);
2683
2684                         orig_type = iter->declaration.type;
2685                 } else {
2686                         expression_t *array_index = designator->array_index;
2687                         assert(designator->array_index != NULL);
2688                         assert(is_type_array(type));
2689
2690                         long index         = fold_constant(array_index);
2691                         ir_type *arr_type  = get_ir_type(type);
2692                         ir_type *elem_type = get_array_element_type(arr_type);
2693                         long     elem_size = get_type_size_bytes(elem_type);
2694
2695                         offset += index * elem_size;
2696
2697                         orig_type = type->array.element_type;
2698                 }
2699         }
2700
2701         return offset;
2702 }
2703
2704 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2705 {
2706         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2707         long      offset = get_offsetof_offset(expression);
2708         tarval   *tv     = new_tarval_from_long(offset, mode);
2709         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2710
2711         return new_d_Const(dbgi, tv);
2712 }
2713
2714 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2715                                      ir_entity *entity, type_t *type);
2716
2717 static ir_node *compound_literal_to_firm(
2718                 const compound_literal_expression_t *expression)
2719 {
2720         type_t *type = expression->type;
2721
2722         /* create an entity on the stack */
2723         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2724
2725         ident     *const id     = id_unique("CompLit.%u");
2726         ir_type   *const irtype = get_ir_type(type);
2727         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2728         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2729         set_entity_ld_ident(entity, id);
2730
2731         set_entity_variability(entity, variability_uninitialized);
2732
2733         /* create initialisation code */
2734         initializer_t *initializer = expression->initializer;
2735         create_local_initializer(initializer, dbgi, entity, type);
2736
2737         /* create a sel for the compound literal address */
2738         ir_node *frame = get_local_frame(entity);
2739         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2740         return sel;
2741 }
2742
2743 /**
2744  * Transform a sizeof expression into Firm code.
2745  */
2746 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2747 {
2748         type_t *type = expression->type;
2749         if (type == NULL) {
2750                 type = expression->tp_expression->base.type;
2751                 assert(type != NULL);
2752         }
2753
2754         type = skip_typeref(type);
2755         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2756         if (is_type_array(type) && type->array.is_vla
2757                         && expression->tp_expression != NULL) {
2758                 expression_to_firm(expression->tp_expression);
2759         }
2760
2761         return get_type_size(type);
2762 }
2763
2764 static entity_t *get_expression_entity(const expression_t *expression)
2765 {
2766         if (expression->kind != EXPR_REFERENCE)
2767                 return NULL;
2768
2769         return expression->reference.entity;
2770 }
2771
2772 /**
2773  * Transform an alignof expression into Firm code.
2774  */
2775 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2776 {
2777         ir_entity *irentity = NULL;
2778
2779         const expression_t *tp_expression = expression->tp_expression;
2780         if (tp_expression != NULL) {
2781                 entity_t *entity = get_expression_entity(tp_expression);
2782                 if (entity != NULL && is_declaration(entity)) {
2783                         switch (entity->declaration.kind) {
2784                         case DECLARATION_KIND_UNKNOWN:
2785                                 panic("unknown entity reference found");
2786                         case DECLARATION_KIND_COMPOUND_MEMBER:
2787                                 irentity = entity->compound_member.entity;
2788                                 break;
2789                         case DECLARATION_KIND_GLOBAL_VARIABLE:
2790                         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2791                                 irentity = entity->variable.v.entity;
2792                                 break;
2793                         case DECLARATION_KIND_PARAMETER_ENTITY:
2794                                 irentity = entity->parameter.v.entity;
2795                                 break;
2796                         case DECLARATION_KIND_FUNCTION:
2797                         case DECLARATION_KIND_INNER_FUNCTION:
2798                                 irentity = entity->function.entity;
2799                                 break;
2800                         case DECLARATION_KIND_PARAMETER:
2801                         case DECLARATION_KIND_LOCAL_VARIABLE:
2802                         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2803                                 break;
2804                         }
2805                 }
2806         }
2807
2808         ir_type *irtype;
2809         if (irentity != NULL) {
2810                 irtype = get_entity_type(irentity);
2811         } else {
2812                 type_t *type = expression->type;
2813                 irtype = get_ir_type(type);
2814         }
2815
2816         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2817         symconst_symbol sym;
2818         sym.type_p = irtype;
2819         return new_SymConst(mode, sym, symconst_type_align);
2820 }
2821
2822 static void init_ir_types(void);
2823
2824 long fold_constant(const expression_t *expression)
2825 {
2826         assert(is_type_valid(skip_typeref(expression->base.type)));
2827
2828         bool constant_folding_old = constant_folding;
2829         constant_folding = true;
2830
2831         init_ir_types();
2832
2833         assert(is_constant_expression(expression));
2834
2835         ir_graph *old_current_ir_graph = current_ir_graph;
2836         current_ir_graph = get_const_code_irg();
2837
2838         ir_node *cnst = expression_to_firm(expression);
2839         current_ir_graph = old_current_ir_graph;
2840
2841         if (!is_Const(cnst)) {
2842                 panic("couldn't fold constant");
2843         }
2844
2845         tarval *tv = get_Const_tarval(cnst);
2846         if (!tarval_is_long(tv)) {
2847                 panic("result of constant folding is not integer");
2848         }
2849
2850         constant_folding = constant_folding_old;
2851
2852         return get_tarval_long(tv);
2853 }
2854
2855 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2856 {
2857         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2858
2859         /* first try to fold a constant condition */
2860         if (is_constant_expression(expression->condition)) {
2861                 long val = fold_constant(expression->condition);
2862                 if (val) {
2863                         expression_t *true_expression = expression->true_expression;
2864                         if (true_expression == NULL)
2865                                 true_expression = expression->condition;
2866                         return expression_to_firm(true_expression);
2867                 } else {
2868                         return expression_to_firm(expression->false_expression);
2869                 }
2870         }
2871
2872         ir_node *cur_block   = get_cur_block();
2873
2874         /* create the true block */
2875         ir_node *true_block  = new_immBlock();
2876         set_cur_block(true_block);
2877
2878         ir_node *true_val = expression->true_expression != NULL ?
2879                 expression_to_firm(expression->true_expression) : NULL;
2880         ir_node *true_jmp = new_Jmp();
2881
2882         /* create the false block */
2883         ir_node *false_block = new_immBlock();
2884         set_cur_block(false_block);
2885
2886         ir_node *false_val = expression_to_firm(expression->false_expression);
2887         ir_node *false_jmp = new_Jmp();
2888
2889         /* create the condition evaluation */
2890         set_cur_block(cur_block);
2891         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2892         if (expression->true_expression == NULL) {
2893                 if (cond_expr != NULL) {
2894                         true_val = cond_expr;
2895                 } else {
2896                         /* Condition ended with a short circuit (&&, ||, !) operation.
2897                          * Generate a "1" as value for the true branch. */
2898                         true_val = new_Const(get_mode_one(mode_Is));
2899                 }
2900         }
2901         mature_immBlock(true_block);
2902         mature_immBlock(false_block);
2903
2904         /* create the common block */
2905         ir_node *in_cf[2] = { true_jmp, false_jmp };
2906         new_Block(2, in_cf);
2907
2908         /* TODO improve static semantics, so either both or no values are NULL */
2909         if (true_val == NULL || false_val == NULL)
2910                 return NULL;
2911
2912         ir_node *in[2] = { true_val, false_val };
2913         ir_mode *mode  = get_irn_mode(true_val);
2914         assert(get_irn_mode(false_val) == mode);
2915         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2916
2917         return val;
2918 }
2919
2920 /**
2921  * Returns an IR-node representing the address of a field.
2922  */
2923 static ir_node *select_addr(const select_expression_t *expression)
2924 {
2925         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2926
2927         construct_select_compound(expression);
2928
2929         ir_node *compound_addr = expression_to_firm(expression->compound);
2930
2931         entity_t *entry = expression->compound_entry;
2932         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2933         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2934
2935         if (constant_folding) {
2936                 ir_mode *mode = get_irn_mode(compound_addr);
2937                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2938                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
2939                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2940         } else {
2941                 ir_entity *irentity = entry->compound_member.entity;
2942                 assert(irentity != NULL);
2943                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2944         }
2945 }
2946
2947 static ir_node *select_to_firm(const select_expression_t *expression)
2948 {
2949         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2950         ir_node  *addr = select_addr(expression);
2951         type_t   *type = revert_automatic_type_conversion(
2952                         (const expression_t*) expression);
2953         type           = skip_typeref(type);
2954
2955         entity_t *entry      = expression->compound_entry;
2956         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2957         type_t   *entry_type = skip_typeref(entry->declaration.type);
2958
2959         if (entry_type->kind == TYPE_BITFIELD) {
2960                 return bitfield_extract_to_firm(expression, addr);
2961         }
2962
2963         return deref_address(dbgi, type, addr);
2964 }
2965
2966 /* Values returned by __builtin_classify_type. */
2967 typedef enum gcc_type_class
2968 {
2969         no_type_class = -1,
2970         void_type_class,
2971         integer_type_class,
2972         char_type_class,
2973         enumeral_type_class,
2974         boolean_type_class,
2975         pointer_type_class,
2976         reference_type_class,
2977         offset_type_class,
2978         real_type_class,
2979         complex_type_class,
2980         function_type_class,
2981         method_type_class,
2982         record_type_class,
2983         union_type_class,
2984         array_type_class,
2985         string_type_class,
2986         set_type_class,
2987         file_type_class,
2988         lang_type_class
2989 } gcc_type_class;
2990
2991 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2992 {
2993         type_t *type = expr->type_expression->base.type;
2994
2995         /* FIXME gcc returns different values depending on whether compiling C or C++
2996          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2997         gcc_type_class tc;
2998         for (;;) {
2999                 type = skip_typeref(type);
3000                 switch (type->kind) {
3001                         case TYPE_ATOMIC: {
3002                                 const atomic_type_t *const atomic_type = &type->atomic;
3003                                 switch (atomic_type->akind) {
3004                                         /* should not be reached */
3005                                         case ATOMIC_TYPE_INVALID:
3006                                                 tc = no_type_class;
3007                                                 goto make_const;
3008
3009                                         /* gcc cannot do that */
3010                                         case ATOMIC_TYPE_VOID:
3011                                                 tc = void_type_class;
3012                                                 goto make_const;
3013
3014                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3015                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3016                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3017                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3018                                         case ATOMIC_TYPE_SHORT:
3019                                         case ATOMIC_TYPE_USHORT:
3020                                         case ATOMIC_TYPE_INT:
3021                                         case ATOMIC_TYPE_UINT:
3022                                         case ATOMIC_TYPE_LONG:
3023                                         case ATOMIC_TYPE_ULONG:
3024                                         case ATOMIC_TYPE_LONGLONG:
3025                                         case ATOMIC_TYPE_ULONGLONG:
3026                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3027                                                 tc = integer_type_class;
3028                                                 goto make_const;
3029
3030                                         case ATOMIC_TYPE_FLOAT:
3031                                         case ATOMIC_TYPE_DOUBLE:
3032                                         case ATOMIC_TYPE_LONG_DOUBLE:
3033                                                 tc = real_type_class;
3034                                                 goto make_const;
3035                                 }
3036                                 panic("Unexpected atomic type in classify_type_to_firm().");
3037                         }
3038
3039                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3040                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3041                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3042                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3043                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3044                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3045                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3046                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3047
3048                         /* gcc handles this as integer */
3049                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3050
3051                         /* gcc classifies the referenced type */
3052                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3053
3054                         case TYPE_BUILTIN:
3055                         /* typedef/typeof should be skipped already */
3056                         case TYPE_TYPEDEF:
3057                         case TYPE_TYPEOF:
3058                         case TYPE_INVALID:
3059                         case TYPE_ERROR:
3060                                 break;
3061                 }
3062                 panic("unexpected TYPE classify_type_to_firm().");
3063         }
3064
3065 make_const:;
3066         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3067         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3068         return new_d_Const(dbgi, tv);
3069 }
3070
3071 static ir_node *function_name_to_firm(
3072                 const funcname_expression_t *const expr)
3073 {
3074         switch(expr->kind) {
3075         case FUNCNAME_FUNCTION:
3076         case FUNCNAME_PRETTY_FUNCTION:
3077         case FUNCNAME_FUNCDNAME:
3078                 if (current_function_name == NULL) {
3079                         const source_position_t *const src_pos = &expr->base.source_position;
3080                         const char    *name  = current_function_entity->base.symbol->string;
3081                         const string_t string = { name, strlen(name) + 1 };
3082                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3083                 }
3084                 return current_function_name;
3085         case FUNCNAME_FUNCSIG:
3086                 if (current_funcsig == NULL) {
3087                         const source_position_t *const src_pos = &expr->base.source_position;
3088                         ir_entity *ent = get_irg_entity(current_ir_graph);
3089                         const char *const name = get_entity_ld_name(ent);
3090                         const string_t string = { name, strlen(name) + 1 };
3091                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3092                 }
3093                 return current_funcsig;
3094         }
3095         panic("Unsupported function name");
3096 }
3097
3098 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3099 {
3100         statement_t *statement = expr->statement;
3101
3102         assert(statement->kind == STATEMENT_COMPOUND);
3103         return compound_statement_to_firm(&statement->compound);
3104 }
3105
3106 static ir_node *va_start_expression_to_firm(
3107         const va_start_expression_t *const expr)
3108 {
3109         type_t    *const type        = current_function_entity->declaration.type;
3110         ir_type   *const method_type = get_ir_type(type);
3111         int        const n           = get_method_n_params(method_type) - 1;
3112         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3113         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
3114         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3115         ir_node   *const no_mem      = new_NoMem();
3116         ir_node   *const arg_sel     =
3117                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3118
3119         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
3120         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3121         set_value_for_expression(expr->ap, add);
3122
3123         return NULL;
3124 }
3125
3126 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3127 {
3128         type_t       *const type    = expr->base.type;
3129         expression_t *const ap_expr = expr->ap;
3130         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3131         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3132         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3133         ir_node      *const res     = deref_address(dbgi, type, ap);
3134
3135         ir_node      *const cnst    = get_type_size(expr->base.type);
3136         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
3137
3138         set_value_for_expression_addr(ap_expr, add, ap_addr);
3139
3140         return res;
3141 }
3142
3143 static ir_node *dereference_addr(const unary_expression_t *const expression)
3144 {
3145         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3146         return expression_to_firm(expression->value);
3147 }
3148
3149 /**
3150  * Returns a IR-node representing an lvalue of the given expression.
3151  */
3152 static ir_node *expression_to_addr(const expression_t *expression)
3153 {
3154         switch(expression->kind) {
3155         case EXPR_ARRAY_ACCESS:
3156                 return array_access_addr(&expression->array_access);
3157         case EXPR_CALL:
3158                 return call_expression_to_firm(&expression->call);
3159         case EXPR_COMPOUND_LITERAL:
3160                 return compound_literal_to_firm(&expression->compound_literal);
3161         case EXPR_REFERENCE:
3162                 return reference_addr(&expression->reference);
3163         case EXPR_SELECT:
3164                 return select_addr(&expression->select);
3165         case EXPR_UNARY_DEREFERENCE:
3166                 return dereference_addr(&expression->unary);
3167         default:
3168                 break;
3169         }
3170         panic("trying to get address of non-lvalue");
3171 }
3172
3173 static ir_node *builtin_constant_to_firm(
3174                 const builtin_constant_expression_t *expression)
3175 {
3176         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3177         long     v;
3178
3179         if (is_constant_expression(expression->value)) {
3180                 v = 1;
3181         } else {
3182                 v = 0;
3183         }
3184         return new_Const_long(mode, v);
3185 }
3186
3187 static ir_node *builtin_types_compatible_to_firm(
3188                 const builtin_types_compatible_expression_t *expression)
3189 {
3190         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3191         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3192         long     const value = types_compatible(left, right) ? 1 : 0;
3193         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3194         return new_Const_long(mode, value);
3195 }
3196
3197 static ir_node *builtin_prefetch_to_firm(
3198                 const builtin_prefetch_expression_t *expression)
3199 {
3200         ir_node *adr = expression_to_firm(expression->adr);
3201         /* no Firm support for prefetch yet */
3202         (void) adr;
3203         return NULL;
3204 }
3205
3206 static ir_node *get_label_block(label_t *label)
3207 {
3208         if (label->block != NULL)
3209                 return label->block;
3210
3211         /* beware: might be called from create initializer with current_ir_graph
3212          * set to const_code_irg. */
3213         ir_graph *rem    = current_ir_graph;
3214         current_ir_graph = current_function;
3215
3216         ir_node *block = new_immBlock();
3217
3218         label->block = block;
3219
3220         ARR_APP1(label_t *, all_labels, label);
3221
3222         current_ir_graph = rem;
3223         return block;
3224 }
3225
3226 /**
3227  * Pointer to a label.  This is used for the
3228  * GNU address-of-label extension.
3229  */
3230 static ir_node *label_address_to_firm(
3231                 const label_address_expression_t *label)
3232 {
3233         ir_node    *block = get_label_block(label->label);
3234         ir_label_t  nr    = get_Block_label(block);
3235
3236         if (nr == 0) {
3237                 nr = get_irp_next_label_nr();
3238                 set_Block_label(block, nr);
3239         }
3240         symconst_symbol value;
3241         value.label = nr;
3242         return new_SymConst(mode_P_code, value, symconst_label);
3243 }
3244
3245 static ir_node *builtin_symbol_to_firm(
3246                 const builtin_symbol_expression_t *expression)
3247 {
3248         /* for gcc compatibility we have to produce (dummy) addresses for some
3249          * builtins */
3250         if (warning.other) {
3251                 warningf(&expression->base.source_position,
3252                                  "taking address of builtin '%Y'", expression->symbol);
3253         }
3254
3255         /* simply create a NULL pointer */
3256         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
3257         ir_node  *res  = new_Const_long(mode, 0);
3258
3259         return res;
3260 }
3261
3262 /**
3263  * creates firm nodes for an expression. The difference between this function
3264  * and expression_to_firm is, that this version might produce mode_b nodes
3265  * instead of mode_Is.
3266  */
3267 static ir_node *_expression_to_firm(const expression_t *expression)
3268 {
3269 #ifndef NDEBUG
3270         if (!constant_folding) {
3271                 assert(!expression->base.transformed);
3272                 ((expression_t*) expression)->base.transformed = true;
3273         }
3274 #endif
3275
3276         switch (expression->kind) {
3277         case EXPR_CHARACTER_CONSTANT:
3278                 return character_constant_to_firm(&expression->conste);
3279         case EXPR_WIDE_CHARACTER_CONSTANT:
3280                 return wide_character_constant_to_firm(&expression->conste);
3281         case EXPR_CONST:
3282                 return const_to_firm(&expression->conste);
3283         case EXPR_STRING_LITERAL:
3284                 return string_literal_to_firm(&expression->string);
3285         case EXPR_WIDE_STRING_LITERAL:
3286                 return wide_string_literal_to_firm(&expression->wide_string);
3287         case EXPR_REFERENCE:
3288                 return reference_expression_to_firm(&expression->reference);
3289         case EXPR_REFERENCE_ENUM_VALUE:
3290                 return reference_expression_enum_value_to_firm(&expression->reference);
3291         case EXPR_CALL:
3292                 return call_expression_to_firm(&expression->call);
3293         EXPR_UNARY_CASES
3294                 return unary_expression_to_firm(&expression->unary);
3295         EXPR_BINARY_CASES
3296                 return binary_expression_to_firm(&expression->binary);
3297         case EXPR_ARRAY_ACCESS:
3298                 return array_access_to_firm(&expression->array_access);
3299         case EXPR_SIZEOF:
3300                 return sizeof_to_firm(&expression->typeprop);
3301         case EXPR_ALIGNOF:
3302                 return alignof_to_firm(&expression->typeprop);
3303         case EXPR_CONDITIONAL:
3304                 return conditional_to_firm(&expression->conditional);
3305         case EXPR_SELECT:
3306                 return select_to_firm(&expression->select);
3307         case EXPR_CLASSIFY_TYPE:
3308                 return classify_type_to_firm(&expression->classify_type);
3309         case EXPR_FUNCNAME:
3310                 return function_name_to_firm(&expression->funcname);
3311         case EXPR_STATEMENT:
3312                 return statement_expression_to_firm(&expression->statement);
3313         case EXPR_VA_START:
3314                 return va_start_expression_to_firm(&expression->va_starte);
3315         case EXPR_VA_ARG:
3316                 return va_arg_expression_to_firm(&expression->va_arge);
3317         case EXPR_BUILTIN_SYMBOL:
3318                 return builtin_symbol_to_firm(&expression->builtin_symbol);
3319         case EXPR_BUILTIN_CONSTANT_P:
3320                 return builtin_constant_to_firm(&expression->builtin_constant);
3321         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3322                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3323         case EXPR_BUILTIN_PREFETCH:
3324                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3325         case EXPR_OFFSETOF:
3326                 return offsetof_to_firm(&expression->offsetofe);
3327         case EXPR_COMPOUND_LITERAL:
3328                 return compound_literal_to_firm(&expression->compound_literal);
3329         case EXPR_LABEL_ADDRESS:
3330                 return label_address_to_firm(&expression->label_address);
3331
3332         case EXPR_UNKNOWN:
3333         case EXPR_INVALID:
3334                 break;
3335         }
3336         panic("invalid expression found");
3337 }
3338
3339 static bool is_builtin_expect(const expression_t *expression)
3340 {
3341         if (expression->kind != EXPR_CALL)
3342                 return false;
3343
3344         expression_t *function = expression->call.function;
3345         if (function->kind != EXPR_BUILTIN_SYMBOL)
3346                 return false;
3347         if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3348                 return false;
3349
3350         return true;
3351 }
3352
3353 static bool produces_mode_b(const expression_t *expression)
3354 {
3355         switch (expression->kind) {
3356         case EXPR_BINARY_EQUAL:
3357         case EXPR_BINARY_NOTEQUAL:
3358         case EXPR_BINARY_LESS:
3359         case EXPR_BINARY_LESSEQUAL:
3360         case EXPR_BINARY_GREATER:
3361         case EXPR_BINARY_GREATEREQUAL:
3362         case EXPR_BINARY_ISGREATER:
3363         case EXPR_BINARY_ISGREATEREQUAL:
3364         case EXPR_BINARY_ISLESS:
3365         case EXPR_BINARY_ISLESSEQUAL:
3366         case EXPR_BINARY_ISLESSGREATER:
3367         case EXPR_BINARY_ISUNORDERED:
3368         case EXPR_UNARY_NOT:
3369                 return true;
3370
3371         case EXPR_CALL:
3372                 if (is_builtin_expect(expression)) {
3373                         expression_t *argument = expression->call.arguments->expression;
3374                         return produces_mode_b(argument);
3375                 }
3376                 return false;
3377         case EXPR_BINARY_COMMA:
3378                 return produces_mode_b(expression->binary.right);
3379
3380         default:
3381                 return false;
3382         }
3383 }
3384
3385 static ir_node *expression_to_firm(const expression_t *expression)
3386 {
3387         if (!produces_mode_b(expression)) {
3388                 ir_node *res = _expression_to_firm(expression);
3389                 assert(res == NULL || get_irn_mode(res) != mode_b);
3390                 return res;
3391         }
3392
3393         if (is_constant_expression(expression)) {
3394                 ir_node *res  = _expression_to_firm(expression);
3395                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3396                 assert(is_Const(res));
3397                 if (is_Const_null(res)) {
3398                         return new_Const_long(mode, 0);
3399                 } else {
3400                         return new_Const_long(mode, 1);
3401                 }
3402         }
3403
3404         /* we have to produce a 0/1 from the mode_b expression */
3405         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3406         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3407         return produce_condition_result(expression, mode, dbgi);
3408 }
3409
3410 /**
3411  * create a short-circuit expression evaluation that tries to construct
3412  * efficient control flow structures for &&, || and ! expressions
3413  */
3414 static ir_node *create_condition_evaluation(const expression_t *expression,
3415                                             ir_node *true_block,
3416                                             ir_node *false_block)
3417 {
3418         switch(expression->kind) {
3419         case EXPR_UNARY_NOT: {
3420                 const unary_expression_t *unary_expression = &expression->unary;
3421                 create_condition_evaluation(unary_expression->value, false_block,
3422                                             true_block);
3423                 return NULL;
3424         }
3425         case EXPR_BINARY_LOGICAL_AND: {
3426                 const binary_expression_t *binary_expression = &expression->binary;
3427
3428                 ir_node *extra_block = new_immBlock();
3429                 create_condition_evaluation(binary_expression->left, extra_block,
3430                                             false_block);
3431                 mature_immBlock(extra_block);
3432                 set_cur_block(extra_block);
3433                 create_condition_evaluation(binary_expression->right, true_block,
3434                                             false_block);
3435                 return NULL;
3436         }
3437         case EXPR_BINARY_LOGICAL_OR: {
3438                 const binary_expression_t *binary_expression = &expression->binary;
3439
3440                 ir_node *extra_block = new_immBlock();
3441                 create_condition_evaluation(binary_expression->left, true_block,
3442                                             extra_block);
3443                 mature_immBlock(extra_block);
3444                 set_cur_block(extra_block);
3445                 create_condition_evaluation(binary_expression->right, true_block,
3446                                             false_block);
3447                 return NULL;
3448         }
3449         default:
3450                 break;
3451         }
3452
3453         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3454         ir_node  *cond_expr  = _expression_to_firm(expression);
3455         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3456         ir_node  *cond       = new_d_Cond(dbgi, condition);
3457         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3458         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3459
3460         /* set branch prediction info based on __builtin_expect */
3461         if (is_builtin_expect(expression) && is_Cond(cond)) {
3462                 call_argument_t *argument = expression->call.arguments->next;
3463                 if (is_constant_expression(argument->expression)) {
3464                         long               cnst = fold_constant(argument->expression);
3465                         cond_jmp_predicate pred;
3466
3467                         if (cnst == 0) {
3468                                 pred = COND_JMP_PRED_FALSE;
3469                         } else {
3470                                 pred = COND_JMP_PRED_TRUE;
3471                         }
3472                         set_Cond_jmp_pred(cond, pred);
3473                 }
3474         }
3475
3476         add_immBlock_pred(true_block, true_proj);
3477         add_immBlock_pred(false_block, false_proj);
3478
3479         set_cur_block(NULL);
3480         return cond_expr;
3481 }
3482
3483
3484 static void create_variable_entity(entity_t *variable,
3485                                    declaration_kind_t declaration_kind,
3486                                    ir_type *parent_type)
3487 {
3488         assert(variable->kind == ENTITY_VARIABLE);
3489         type_t    *type = skip_typeref(variable->declaration.type);
3490         type            = get_aligned_type(type, variable->variable.alignment);
3491
3492         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3493         ir_type   *const irtype   = get_ir_type(type);
3494         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3495
3496         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3497
3498         handle_gnu_attributes_ent(irentity, variable);
3499
3500         variable->declaration.kind  = (unsigned char) declaration_kind;
3501         variable->variable.v.entity = irentity;
3502         set_entity_variability(irentity, variability_uninitialized);
3503         set_entity_ld_ident(irentity, create_ld_ident(variable));
3504
3505         if (parent_type == get_tls_type())
3506                 set_entity_allocation(irentity, allocation_automatic);
3507         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3508                 set_entity_allocation(irentity, allocation_static);
3509
3510         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3511                 set_entity_volatility(irentity, volatility_is_volatile);
3512         }
3513 }
3514
3515
3516 typedef struct type_path_entry_t type_path_entry_t;
3517 struct type_path_entry_t {
3518         type_t           *type;
3519         ir_initializer_t *initializer;
3520         size_t            index;
3521         entity_t         *compound_entry;
3522 };
3523
3524 typedef struct type_path_t type_path_t;
3525 struct type_path_t {
3526         type_path_entry_t *path;
3527         type_t            *top_type;
3528         bool               invalid;
3529 };
3530
3531 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3532 {
3533         size_t len = ARR_LEN(path->path);
3534
3535         for (size_t i = 0; i < len; ++i) {
3536                 const type_path_entry_t *entry = & path->path[i];
3537
3538                 type_t *type = skip_typeref(entry->type);
3539                 if (is_type_compound(type)) {
3540                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3541                 } else if (is_type_array(type)) {
3542                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3543                 } else {
3544                         fprintf(stderr, "-INVALID-");
3545                 }
3546         }
3547         fprintf(stderr, "  (");
3548         print_type(path->top_type);
3549         fprintf(stderr, ")");
3550 }
3551
3552 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3553 {
3554         size_t len = ARR_LEN(path->path);
3555         assert(len > 0);
3556         return & path->path[len-1];
3557 }
3558
3559 static type_path_entry_t *append_to_type_path(type_path_t *path)
3560 {
3561         size_t len = ARR_LEN(path->path);
3562         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3563
3564         type_path_entry_t *result = & path->path[len];
3565         memset(result, 0, sizeof(result[0]));
3566         return result;
3567 }
3568
3569 static size_t get_compound_member_count(const compound_type_t *type)
3570 {
3571         compound_t *compound  = type->compound;
3572         size_t      n_members = 0;
3573         entity_t   *member    = compound->members.entities;
3574         for ( ; member != NULL; member = member->base.next) {
3575                 ++n_members;
3576         }
3577
3578         return n_members;
3579 }
3580
3581 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3582 {
3583         type_t *orig_top_type = path->top_type;
3584         type_t *top_type      = skip_typeref(orig_top_type);
3585
3586         assert(is_type_compound(top_type) || is_type_array(top_type));
3587
3588         if (ARR_LEN(path->path) == 0) {
3589                 return NULL;
3590         } else {
3591                 type_path_entry_t *top         = get_type_path_top(path);
3592                 ir_initializer_t  *initializer = top->initializer;
3593                 return get_initializer_compound_value(initializer, top->index);
3594         }
3595 }
3596
3597 static void descend_into_subtype(type_path_t *path)
3598 {
3599         type_t *orig_top_type = path->top_type;
3600         type_t *top_type      = skip_typeref(orig_top_type);
3601
3602         assert(is_type_compound(top_type) || is_type_array(top_type));
3603
3604         ir_initializer_t *initializer = get_initializer_entry(path);
3605
3606         type_path_entry_t *top = append_to_type_path(path);
3607         top->type              = top_type;
3608
3609         size_t len;
3610
3611         if (is_type_compound(top_type)) {
3612                 compound_t *compound = top_type->compound.compound;
3613                 entity_t   *entry    = compound->members.entities;
3614
3615                 top->compound_entry = entry;
3616                 top->index          = 0;
3617                 len                 = get_compound_member_count(&top_type->compound);
3618                 if (entry != NULL) {
3619                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3620                         path->top_type = entry->declaration.type;
3621                 }
3622         } else {
3623                 assert(is_type_array(top_type));
3624                 assert(top_type->array.size > 0);
3625
3626                 top->index     = 0;
3627                 path->top_type = top_type->array.element_type;
3628                 len            = top_type->array.size;
3629         }
3630         if (initializer == NULL
3631                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3632                 initializer = create_initializer_compound(len);
3633                 /* we have to set the entry at the 2nd latest path entry... */
3634                 size_t path_len = ARR_LEN(path->path);
3635                 assert(path_len >= 1);
3636                 if (path_len > 1) {
3637                         type_path_entry_t *entry        = & path->path[path_len-2];
3638                         ir_initializer_t  *tinitializer = entry->initializer;
3639                         set_initializer_compound_value(tinitializer, entry->index,
3640                                                        initializer);
3641                 }
3642         }
3643         top->initializer = initializer;
3644 }
3645
3646 static void ascend_from_subtype(type_path_t *path)
3647 {
3648         type_path_entry_t *top = get_type_path_top(path);
3649
3650         path->top_type = top->type;
3651
3652         size_t len = ARR_LEN(path->path);
3653         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3654 }
3655
3656 static void walk_designator(type_path_t *path, const designator_t *designator)
3657 {
3658         /* designators start at current object type */
3659         ARR_RESIZE(type_path_entry_t, path->path, 1);
3660
3661         for ( ; designator != NULL; designator = designator->next) {
3662                 type_path_entry_t *top         = get_type_path_top(path);
3663                 type_t            *orig_type   = top->type;
3664                 type_t            *type        = skip_typeref(orig_type);
3665
3666                 if (designator->symbol != NULL) {
3667                         assert(is_type_compound(type));
3668                         size_t    index  = 0;
3669                         symbol_t *symbol = designator->symbol;
3670
3671                         compound_t *compound = type->compound.compound;
3672                         entity_t   *iter     = compound->members.entities;
3673                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3674                                 if (iter->base.symbol == symbol) {
3675                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3676                                         break;
3677                                 }
3678                         }
3679                         assert(iter != NULL);
3680
3681                         top->type           = orig_type;
3682                         top->compound_entry = iter;
3683                         top->index          = index;
3684                         orig_type           = iter->declaration.type;
3685                 } else {
3686                         expression_t *array_index = designator->array_index;
3687                         assert(designator->array_index != NULL);
3688                         assert(is_type_array(type));
3689
3690                         long index = fold_constant(array_index);
3691                         assert(index >= 0);
3692 #ifndef NDEBUG
3693                         if (type->array.size_constant) {
3694                                 long array_size = type->array.size;
3695                                 assert(index < array_size);
3696                         }
3697 #endif
3698
3699                         top->type  = orig_type;
3700                         top->index = (size_t) index;
3701                         orig_type  = type->array.element_type;
3702                 }
3703                 path->top_type = orig_type;
3704
3705                 if (designator->next != NULL) {
3706                         descend_into_subtype(path);
3707                 }
3708         }
3709
3710         path->invalid  = false;
3711 }
3712
3713 static void advance_current_object(type_path_t *path)
3714 {
3715         if (path->invalid) {
3716                 /* TODO: handle this... */
3717                 panic("invalid initializer in ast2firm (excessive elements)");
3718         }
3719
3720         type_path_entry_t *top = get_type_path_top(path);
3721
3722         type_t *type = skip_typeref(top->type);
3723         if (is_type_union(type)) {
3724                 top->compound_entry = NULL;
3725         } else if (is_type_struct(type)) {
3726                 entity_t *entry = top->compound_entry;
3727
3728                 top->index++;
3729                 entry               = entry->base.next;
3730                 top->compound_entry = entry;
3731                 if (entry != NULL) {
3732                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3733                         path->top_type = entry->declaration.type;
3734                         return;
3735                 }
3736         } else {
3737                 assert(is_type_array(type));
3738
3739                 top->index++;
3740                 if (!type->array.size_constant || top->index < type->array.size) {
3741                         return;
3742                 }
3743         }
3744
3745         /* we're past the last member of the current sub-aggregate, try if we
3746          * can ascend in the type hierarchy and continue with another subobject */
3747         size_t len = ARR_LEN(path->path);
3748
3749         if (len > 1) {
3750                 ascend_from_subtype(path);
3751                 advance_current_object(path);
3752         } else {
3753                 path->invalid = true;
3754         }
3755 }
3756
3757
3758 static ir_initializer_t *create_ir_initializer(
3759                 const initializer_t *initializer, type_t *type);
3760
3761 static ir_initializer_t *create_ir_initializer_value(
3762                 const initializer_value_t *initializer)
3763 {
3764         if (is_type_compound(initializer->value->base.type)) {
3765                 panic("initializer creation for compounds not implemented yet");
3766         }
3767         ir_node *value = expression_to_firm(initializer->value);
3768         type_t  *type  = initializer->value->base.type;
3769         ir_mode *mode  = get_ir_mode_storage(type);
3770         value          = create_conv(NULL, value, mode);
3771         return create_initializer_const(value);
3772 }
3773
3774 /** test wether type can be initialized by a string constant */
3775 static bool is_string_type(type_t *type)
3776 {
3777         type_t *inner;
3778         if (is_type_pointer(type)) {
3779                 inner = skip_typeref(type->pointer.points_to);
3780         } else if(is_type_array(type)) {
3781                 inner = skip_typeref(type->array.element_type);
3782         } else {
3783                 return false;
3784         }
3785
3786         return is_type_integer(inner);
3787 }
3788
3789 static ir_initializer_t *create_ir_initializer_list(
3790                 const initializer_list_t *initializer, type_t *type)
3791 {
3792         type_path_t path;
3793         memset(&path, 0, sizeof(path));
3794         path.top_type = type;
3795         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3796
3797         descend_into_subtype(&path);
3798
3799         for (size_t i = 0; i < initializer->len; ++i) {
3800                 const initializer_t *sub_initializer = initializer->initializers[i];
3801
3802                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3803                         walk_designator(&path, sub_initializer->designator.designator);
3804                         continue;
3805                 }
3806
3807                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3808                         /* we might have to descend into types until we're at a scalar
3809                          * type */
3810                         while(true) {
3811                                 type_t *orig_top_type = path.top_type;
3812                                 type_t *top_type      = skip_typeref(orig_top_type);
3813
3814                                 if (is_type_scalar(top_type))
3815                                         break;
3816                                 descend_into_subtype(&path);
3817                         }
3818                 } else if (sub_initializer->kind == INITIALIZER_STRING
3819                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3820                         /* we might have to descend into types until we're at a scalar
3821                          * type */
3822                         while (true) {
3823                                 type_t *orig_top_type = path.top_type;
3824                                 type_t *top_type      = skip_typeref(orig_top_type);
3825
3826                                 if (is_string_type(top_type))
3827                                         break;
3828                                 descend_into_subtype(&path);
3829                         }
3830                 }
3831
3832                 ir_initializer_t *sub_irinitializer
3833                         = create_ir_initializer(sub_initializer, path.top_type);
3834
3835                 size_t path_len = ARR_LEN(path.path);
3836                 assert(path_len >= 1);
3837                 type_path_entry_t *entry        = & path.path[path_len-1];
3838                 ir_initializer_t  *tinitializer = entry->initializer;
3839                 set_initializer_compound_value(tinitializer, entry->index,
3840                                                sub_irinitializer);
3841
3842                 advance_current_object(&path);
3843         }
3844
3845         assert(ARR_LEN(path.path) >= 1);
3846         ir_initializer_t *result = path.path[0].initializer;
3847         DEL_ARR_F(path.path);
3848
3849         return result;
3850 }
3851
3852 static ir_initializer_t *create_ir_initializer_string(
3853                 const initializer_string_t *initializer, type_t *type)
3854 {
3855         type = skip_typeref(type);
3856
3857         size_t            string_len    = initializer->string.size;
3858         assert(type->kind == TYPE_ARRAY);
3859         assert(type->array.size_constant);
3860         size_t            len           = type->array.size;
3861         ir_initializer_t *irinitializer = create_initializer_compound(len);
3862
3863         const char *string = initializer->string.begin;
3864         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3865
3866         for (size_t i = 0; i < len; ++i) {
3867                 char c = 0;
3868                 if (i < string_len)
3869                         c = string[i];
3870
3871                 tarval           *tv = new_tarval_from_long(c, mode);
3872                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3873
3874                 set_initializer_compound_value(irinitializer, i, char_initializer);
3875         }
3876
3877         return irinitializer;
3878 }
3879
3880 static ir_initializer_t *create_ir_initializer_wide_string(
3881                 const initializer_wide_string_t *initializer, type_t *type)
3882 {
3883         size_t            string_len    = initializer->string.size;
3884         assert(type->kind == TYPE_ARRAY);
3885         assert(type->array.size_constant);
3886         size_t            len           = type->array.size;
3887         ir_initializer_t *irinitializer = create_initializer_compound(len);
3888
3889         const wchar_rep_t *string = initializer->string.begin;
3890         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3891
3892         for (size_t i = 0; i < len; ++i) {
3893                 wchar_rep_t c = 0;
3894                 if (i < string_len) {
3895                         c = string[i];
3896                 }
3897                 tarval *tv = new_tarval_from_long(c, mode);
3898                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3899
3900                 set_initializer_compound_value(irinitializer, i, char_initializer);
3901         }
3902
3903         return irinitializer;
3904 }
3905
3906 static ir_initializer_t *create_ir_initializer(
3907                 const initializer_t *initializer, type_t *type)
3908 {
3909         switch(initializer->kind) {
3910                 case INITIALIZER_STRING:
3911                         return create_ir_initializer_string(&initializer->string, type);
3912
3913                 case INITIALIZER_WIDE_STRING:
3914                         return create_ir_initializer_wide_string(&initializer->wide_string,
3915                                                                  type);
3916
3917                 case INITIALIZER_LIST:
3918                         return create_ir_initializer_list(&initializer->list, type);
3919
3920                 case INITIALIZER_VALUE:
3921                         return create_ir_initializer_value(&initializer->value);
3922
3923                 case INITIALIZER_DESIGNATOR:
3924                         panic("unexpected designator initializer found");
3925         }
3926         panic("unknown initializer");
3927 }
3928
3929 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3930                 ir_node *base_addr)
3931 {
3932         if (is_atomic_type(type)) {
3933                 ir_mode *mode = get_type_mode(type);
3934                 tarval  *zero = get_mode_null(mode);
3935                 ir_node *cnst = new_d_Const(dbgi, zero);
3936
3937                 /* TODO: bitfields */
3938                 ir_node *mem    = get_store();
3939                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3940                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3941                 set_store(proj_m);
3942         } else {
3943                 assert(is_compound_type(type));
3944
3945                 int n_members;
3946                 if (is_Array_type(type)) {
3947                         assert(has_array_upper_bound(type, 0));
3948                         n_members = get_array_upper_bound_int(type, 0);
3949                 } else {
3950                         n_members = get_compound_n_members(type);
3951                 }
3952
3953                 for (int i = 0; i < n_members; ++i) {
3954                         ir_node *addr;
3955                         ir_type *irtype;
3956                         if (is_Array_type(type)) {
3957                                 ir_entity *entity   = get_array_element_entity(type);
3958                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3959                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3960                                 ir_node   *in[1]    = { cnst };
3961                                 irtype = get_array_element_type(type);
3962                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3963                         } else {
3964                                 ir_entity *member = get_compound_member(type, i);
3965
3966                                 irtype = get_entity_type(member);
3967                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3968                         }
3969
3970                         create_dynamic_null_initializer(irtype, dbgi, addr);
3971                 }
3972         }
3973 }
3974
3975 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3976                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3977 {
3978         switch(get_initializer_kind(initializer)) {
3979         case IR_INITIALIZER_NULL: {
3980                 create_dynamic_null_initializer(type, dbgi, base_addr);
3981                 return;
3982         }
3983         case IR_INITIALIZER_CONST: {
3984                 ir_node *node     = get_initializer_const_value(initializer);
3985                 ir_mode *mode     = get_irn_mode(node);
3986                 ir_type *ent_type = get_entity_type(entity);
3987
3988                 /* is it a bitfield type? */
3989                 if (is_Primitive_type(ent_type) &&
3990                                 get_primitive_base_type(ent_type) != NULL) {
3991                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3992                         return;
3993                 }
3994
3995                 assert(get_type_mode(type) == mode);
3996                 ir_node *mem    = get_store();
3997                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3998                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3999                 set_store(proj_m);
4000                 return;
4001         }
4002         case IR_INITIALIZER_TARVAL: {
4003                 tarval  *tv       = get_initializer_tarval_value(initializer);
4004                 ir_mode *mode     = get_tarval_mode(tv);
4005                 ir_node *cnst     = new_d_Const(dbgi, tv);
4006                 ir_type *ent_type = get_entity_type(entity);
4007
4008                 /* is it a bitfield type? */
4009                 if (is_Primitive_type(ent_type) &&
4010                                 get_primitive_base_type(ent_type) != NULL) {
4011                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4012                         return;
4013                 }
4014
4015                 assert(get_type_mode(type) == mode);
4016                 ir_node *mem    = get_store();
4017                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4018                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4019                 set_store(proj_m);
4020                 return;
4021         }
4022         case IR_INITIALIZER_COMPOUND: {
4023                 assert(is_compound_type(type));
4024                 int n_members;
4025                 if (is_Array_type(type)) {
4026                         assert(has_array_upper_bound(type, 0));
4027                         n_members = get_array_upper_bound_int(type, 0);
4028                 } else {
4029                         n_members = get_compound_n_members(type);
4030                 }
4031
4032                 if (get_initializer_compound_n_entries(initializer)
4033                                 != (unsigned) n_members)
4034                         panic("initializer doesn't match compound type");
4035
4036                 for (int i = 0; i < n_members; ++i) {
4037                         ir_node   *addr;
4038                         ir_type   *irtype;
4039                         ir_entity *sub_entity;
4040                         if (is_Array_type(type)) {
4041                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4042                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4043                                 ir_node   *in[1]    = { cnst };
4044                                 irtype     = get_array_element_type(type);
4045                                 sub_entity = get_array_element_entity(type);
4046                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4047                                                        sub_entity);
4048                         } else {
4049                                 sub_entity = get_compound_member(type, i);
4050                                 irtype     = get_entity_type(sub_entity);
4051                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4052                                                              sub_entity);
4053                         }
4054
4055                         ir_initializer_t *sub_init
4056                                 = get_initializer_compound_value(initializer, i);
4057
4058                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4059                                                        addr);
4060                 }
4061                 return;
4062         }
4063         }
4064
4065         panic("invalid IR_INITIALIZER found");
4066 }
4067
4068 static void create_dynamic_initializer(ir_initializer_t *initializer,
4069                 dbg_info *dbgi, ir_entity *entity)
4070 {
4071         ir_node *frame     = get_local_frame(entity);
4072         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4073         ir_type *type      = get_entity_type(entity);
4074
4075         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4076 }
4077
4078 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4079                                      ir_entity *entity, type_t *type)
4080 {
4081         ir_node *memory = get_store();
4082         ir_node *nomem  = new_NoMem();
4083         ir_node *frame  = get_irg_frame(current_ir_graph);
4084         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4085
4086         if (initializer->kind == INITIALIZER_VALUE) {
4087                 initializer_value_t *initializer_value = &initializer->value;
4088
4089                 ir_node *value = expression_to_firm(initializer_value->value);
4090                 type = skip_typeref(type);
4091                 assign_value(dbgi, addr, type, value);
4092                 return;
4093         }
4094
4095         if (!is_constant_initializer(initializer)) {
4096                 ir_initializer_t *irinitializer
4097                         = create_ir_initializer(initializer, type);
4098
4099                 create_dynamic_initializer(irinitializer, dbgi, entity);
4100                 return;
4101         }
4102
4103         /* create the ir_initializer */
4104         ir_graph *const old_current_ir_graph = current_ir_graph;
4105         current_ir_graph = get_const_code_irg();
4106
4107         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4108
4109         assert(current_ir_graph == get_const_code_irg());
4110         current_ir_graph = old_current_ir_graph;
4111
4112         /* create a "template" entity which is copied to the entity on the stack */
4113         ident     *const id          = id_unique("initializer.%u");
4114         ir_type   *const irtype      = get_ir_type(type);
4115         ir_type   *const global_type = get_glob_type();
4116         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4117         set_entity_ld_ident(init_entity, id);
4118
4119         set_entity_variability(init_entity, variability_initialized);
4120         set_entity_visibility(init_entity, visibility_local);
4121         set_entity_allocation(init_entity, allocation_static);
4122
4123         set_entity_initializer(init_entity, irinitializer);
4124
4125         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4126         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4127
4128         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4129         set_store(copyb_mem);
4130 }
4131
4132 static void create_initializer_local_variable_entity(entity_t *entity)
4133 {
4134         assert(entity->kind == ENTITY_VARIABLE);
4135         initializer_t *initializer = entity->variable.initializer;
4136         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4137         ir_entity     *irentity    = entity->variable.v.entity;
4138         type_t        *type        = entity->declaration.type;
4139
4140         type = get_aligned_type(type, entity->variable.alignment);
4141         create_local_initializer(initializer, dbgi, irentity, type);
4142 }
4143
4144 static void create_variable_initializer(entity_t *entity)
4145 {
4146         assert(entity->kind == ENTITY_VARIABLE);
4147         initializer_t *initializer = entity->variable.initializer;
4148         if (initializer == NULL)
4149                 return;
4150
4151         declaration_kind_t declaration_kind
4152                 = (declaration_kind_t) entity->declaration.kind;
4153         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4154                 create_initializer_local_variable_entity(entity);
4155                 return;
4156         }
4157
4158         type_t            *type = entity->declaration.type;
4159         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4160
4161         if (initializer->kind == INITIALIZER_VALUE) {
4162                 initializer_value_t *initializer_value = &initializer->value;
4163                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4164
4165                 ir_node *value = expression_to_firm(initializer_value->value);
4166
4167                 type_t  *type = initializer_value->value->base.type;
4168                 ir_mode *mode = get_ir_mode_storage(type);
4169                 value = create_conv(dbgi, value, mode);
4170                 value = do_strict_conv(dbgi, value);
4171
4172                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4173                         set_value(entity->variable.v.value_number, value);
4174                 } else {
4175                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4176
4177                         ir_entity *irentity = entity->variable.v.entity;
4178
4179                         if (tq & TYPE_QUALIFIER_CONST) {
4180                                 set_entity_variability(irentity, variability_constant);
4181                         } else {
4182                                 set_entity_variability(irentity, variability_initialized);
4183                         }
4184                         set_atomic_ent_value(irentity, value);
4185                 }
4186         } else {
4187                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4188                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4189
4190                 ir_entity        *irentity        = entity->variable.v.entity;
4191                 ir_initializer_t *irinitializer
4192                         = create_ir_initializer(initializer, type);
4193
4194                 if (tq & TYPE_QUALIFIER_CONST) {
4195                         set_entity_variability(irentity, variability_constant);
4196                 } else {
4197                         set_entity_variability(irentity, variability_initialized);
4198                 }
4199                 set_entity_initializer(irentity, irinitializer);
4200         }
4201 }
4202
4203 static void create_variable_length_array(entity_t *entity)
4204 {
4205         assert(entity->kind == ENTITY_VARIABLE);
4206         assert(entity->variable.initializer == NULL);
4207
4208         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4209         entity->variable.v.vla_base = NULL;
4210
4211         /* TODO: record VLA somewhere so we create the free node when we leave
4212          * it's scope */
4213 }
4214
4215 static void allocate_variable_length_array(entity_t *entity)
4216 {
4217         assert(entity->kind == ENTITY_VARIABLE);
4218         assert(entity->variable.initializer == NULL);
4219         assert(get_cur_block() != NULL);
4220
4221         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4222         type_t   *type      = entity->declaration.type;
4223         ir_type  *el_type   = get_ir_type(type->array.element_type);
4224
4225         /* make sure size_node is calculated */
4226         get_type_size(type);
4227         ir_node  *elems = type->array.size_node;
4228         ir_node  *mem   = get_store();
4229         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4230
4231         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4232         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4233         set_store(proj_m);
4234
4235         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4236         entity->variable.v.vla_base = addr;
4237 }
4238
4239 /**
4240  * Creates a Firm local variable from a declaration.
4241  */
4242 static void create_local_variable(entity_t *entity)
4243 {
4244         assert(entity->kind == ENTITY_VARIABLE);
4245         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4246
4247         bool needs_entity = entity->variable.address_taken;
4248         type_t *type = skip_typeref(entity->declaration.type);
4249
4250         /* is it a variable length array? */
4251         if (is_type_array(type) && !type->array.size_constant) {
4252                 create_variable_length_array(entity);
4253                 return;
4254         } else if (is_type_array(type) || is_type_compound(type)) {
4255                 needs_entity = true;
4256         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4257                 needs_entity = true;
4258         }
4259
4260         if (needs_entity) {
4261                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4262                 create_variable_entity(entity,
4263                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4264                                        frame_type);
4265         } else {
4266                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4267                 entity->variable.v.value_number = next_value_number_function;
4268                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4269                                         entity);
4270                 ++next_value_number_function;
4271         }
4272 }
4273
4274 static void create_local_static_variable(entity_t *entity)
4275 {
4276         assert(entity->kind == ENTITY_VARIABLE);
4277         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4278
4279         type_t    *type = skip_typeref(entity->declaration.type);
4280         type            = get_aligned_type(type, entity->variable.alignment);
4281
4282         ir_type   *const var_type = entity->variable.thread_local ?
4283                 get_tls_type() : get_glob_type();
4284         ir_type   *const irtype   = get_ir_type(type);
4285         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4286
4287         size_t l = strlen(entity->base.symbol->string);
4288         char   buf[l + sizeof(".%u")];
4289         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4290         ident     *const id = id_unique(buf);
4291
4292         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4293
4294         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4295                 set_entity_volatility(irentity, volatility_is_volatile);
4296         }
4297
4298         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4299         entity->variable.v.entity = irentity;
4300
4301         set_entity_ld_ident(irentity, id);
4302         set_entity_variability(irentity, variability_uninitialized);
4303         set_entity_visibility(irentity, visibility_local);
4304         set_entity_allocation(irentity, entity->variable.thread_local ?
4305                 allocation_automatic : allocation_static);
4306
4307         ir_graph *const old_current_ir_graph = current_ir_graph;
4308         current_ir_graph = get_const_code_irg();
4309
4310         create_variable_initializer(entity);
4311
4312         assert(current_ir_graph == get_const_code_irg());
4313         current_ir_graph = old_current_ir_graph;
4314 }
4315
4316
4317
4318 static void return_statement_to_firm(return_statement_t *statement)
4319 {
4320         if (get_cur_block() == NULL)
4321                 return;
4322
4323         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4324         type_t   *type        = current_function_entity->declaration.type;
4325         ir_type  *func_irtype = get_ir_type(type);
4326
4327
4328         ir_node *in[1];
4329         int      in_len;
4330         if (get_method_n_ress(func_irtype) > 0) {
4331                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4332
4333                 if (statement->value != NULL) {
4334                         ir_node *node = expression_to_firm(statement->value);
4335                         if (!is_compound_type(res_type)) {
4336                                 type_t  *type = statement->value->base.type;
4337                                 ir_mode *mode = get_ir_mode_storage(type);
4338                                 node          = create_conv(dbgi, node, mode);
4339                                 node          = do_strict_conv(dbgi, node);
4340                         }
4341                         in[0] = node;
4342                 } else {
4343                         ir_mode *mode;
4344                         if (is_compound_type(res_type)) {
4345                                 mode = mode_P_data;
4346                         } else {
4347                                 mode = get_type_mode(res_type);
4348                         }
4349                         in[0] = new_Unknown(mode);
4350                 }
4351                 in_len = 1;
4352         } else {
4353                 /* build return_value for its side effects */
4354                 if (statement->value != NULL) {
4355                         expression_to_firm(statement->value);
4356                 }
4357                 in_len = 0;
4358         }
4359
4360         ir_node  *store = get_store();
4361         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4362
4363         ir_node *end_block = get_irg_end_block(current_ir_graph);
4364         add_immBlock_pred(end_block, ret);
4365
4366         set_cur_block(NULL);
4367 }
4368
4369 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4370 {
4371         if (get_cur_block() == NULL)
4372                 return NULL;
4373
4374         return expression_to_firm(statement->expression);
4375 }
4376
4377 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4378 {
4379         entity_t *entity = compound->scope.entities;
4380         for ( ; entity != NULL; entity = entity->base.next) {
4381                 if (!is_declaration(entity))
4382                         continue;
4383
4384                 create_local_declaration(entity);
4385         }
4386
4387         ir_node     *result    = NULL;
4388         statement_t *statement = compound->statements;
4389         for ( ; statement != NULL; statement = statement->base.next) {
4390                 if (statement->base.next == NULL
4391                                 && statement->kind == STATEMENT_EXPRESSION) {
4392                         result = expression_statement_to_firm(
4393                                         &statement->expression);
4394                         break;
4395                 }
4396                 statement_to_firm(statement);
4397         }
4398
4399         return result;
4400 }
4401
4402 static void create_global_variable(entity_t *entity)
4403 {
4404         assert(entity->kind == ENTITY_VARIABLE);
4405
4406         ir_visibility vis;
4407         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4408                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4409                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4410                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4411
4412                 default: panic("Invalid storage class for global variable");
4413         }
4414
4415         ir_type *var_type = entity->variable.thread_local ?
4416                 get_tls_type() : get_glob_type();
4417         create_variable_entity(entity,
4418                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4419         set_entity_visibility(entity->variable.v.entity, vis);
4420 }
4421
4422 static void create_local_declaration(entity_t *entity)
4423 {
4424         assert(is_declaration(entity));
4425
4426         /* construct type */
4427         (void) get_ir_type(entity->declaration.type);
4428         if (entity->base.symbol == NULL) {
4429                 return;
4430         }
4431
4432         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4433         case STORAGE_CLASS_STATIC:
4434                 create_local_static_variable(entity);
4435                 return;
4436         case STORAGE_CLASS_EXTERN:
4437                 if (entity->kind == ENTITY_FUNCTION) {
4438                         assert(entity->function.statement == NULL);
4439                         get_function_entity(entity);
4440                 } else {
4441                         create_global_variable(entity);
4442                         create_variable_initializer(entity);
4443                 }
4444                 return;
4445         case STORAGE_CLASS_NONE:
4446         case STORAGE_CLASS_AUTO:
4447         case STORAGE_CLASS_REGISTER:
4448                 if (entity->kind == ENTITY_FUNCTION) {
4449                         if (entity->function.statement != NULL) {
4450                                 get_function_entity(entity);
4451                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4452                                 enqueue_inner_function(entity);
4453                         } else {
4454                                 get_function_entity(entity);
4455                         }
4456                 } else {
4457                         create_local_variable(entity);
4458                 }
4459                 return;
4460         case STORAGE_CLASS_TYPEDEF:
4461                 break;
4462         }
4463         panic("invalid storage class found");
4464 }
4465
4466 static void initialize_local_declaration(entity_t *entity)
4467 {
4468         if (entity->base.symbol == NULL)
4469                 return;
4470
4471         switch ((declaration_kind_t) entity->declaration.kind) {
4472         case DECLARATION_KIND_LOCAL_VARIABLE:
4473         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4474                 create_variable_initializer(entity);
4475                 return;
4476
4477         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4478                 allocate_variable_length_array(entity);
4479                 return;
4480
4481         case DECLARATION_KIND_COMPOUND_MEMBER:
4482         case DECLARATION_KIND_GLOBAL_VARIABLE:
4483         case DECLARATION_KIND_FUNCTION:
4484         case DECLARATION_KIND_INNER_FUNCTION:
4485                 return;
4486
4487         case DECLARATION_KIND_PARAMETER:
4488         case DECLARATION_KIND_PARAMETER_ENTITY:
4489                 panic("can't initialize parameters");
4490
4491         case DECLARATION_KIND_UNKNOWN:
4492                 panic("can't initialize unknown declaration");
4493         }
4494         panic("invalid declaration kind");
4495 }
4496
4497 static void declaration_statement_to_firm(declaration_statement_t *statement)
4498 {
4499         entity_t *entity = statement->declarations_begin;
4500         if (entity == NULL)
4501                 return;
4502
4503         entity_t *const last = statement->declarations_end;
4504         for ( ;; entity = entity->base.next) {
4505                 if (is_declaration(entity)) {
4506                         initialize_local_declaration(entity);
4507                 } else if (entity->kind == ENTITY_TYPEDEF) {
4508                         type_t *const type = skip_typeref(entity->typedefe.type);
4509                         if (is_type_array(type) && type->array.is_vla)
4510                                 get_vla_size(&type->array);
4511                 }
4512                 if (entity == last)
4513                         break;
4514         }
4515 }
4516
4517 static void if_statement_to_firm(if_statement_t *statement)
4518 {
4519         ir_node *cur_block = get_cur_block();
4520
4521         ir_node *fallthrough_block = NULL;
4522
4523         /* the true (blocks) */
4524         ir_node *true_block = NULL;
4525         if (statement->true_statement != NULL) {
4526                 true_block = new_immBlock();
4527                 set_cur_block(true_block);
4528                 statement_to_firm(statement->true_statement);
4529                 if (get_cur_block() != NULL) {
4530                         ir_node *jmp = new_Jmp();
4531                         if (fallthrough_block == NULL)
4532                                 fallthrough_block = new_immBlock();
4533                         add_immBlock_pred(fallthrough_block, jmp);
4534                 }
4535         }
4536
4537         /* the false (blocks) */
4538         ir_node *false_block = NULL;
4539         if (statement->false_statement != NULL) {
4540                 false_block = new_immBlock();
4541                 set_cur_block(false_block);
4542
4543                 statement_to_firm(statement->false_statement);
4544                 if (get_cur_block() != NULL) {
4545                         ir_node *jmp = new_Jmp();
4546                         if (fallthrough_block == NULL)
4547                                 fallthrough_block = new_immBlock();
4548                         add_immBlock_pred(fallthrough_block, jmp);
4549                 }
4550         }
4551
4552         /* create the condition */
4553         if (cur_block != NULL) {
4554                 if (true_block == NULL || false_block == NULL) {
4555                         if (fallthrough_block == NULL)
4556                                 fallthrough_block = new_immBlock();
4557                         if (true_block == NULL)
4558                                 true_block = fallthrough_block;
4559                         if (false_block == NULL)
4560                                 false_block = fallthrough_block;
4561                 }
4562
4563                 set_cur_block(cur_block);
4564                 create_condition_evaluation(statement->condition, true_block,
4565                                             false_block);
4566         }
4567
4568         mature_immBlock(true_block);
4569         if (false_block != fallthrough_block && false_block != NULL) {
4570                 mature_immBlock(false_block);
4571         }
4572         if (fallthrough_block != NULL) {
4573                 mature_immBlock(fallthrough_block);
4574         }
4575
4576         set_cur_block(fallthrough_block);
4577 }
4578
4579 static void while_statement_to_firm(while_statement_t *statement)
4580 {
4581         ir_node *jmp = NULL;
4582         if (get_cur_block() != NULL) {
4583                 jmp = new_Jmp();
4584         }
4585
4586         /* create the header block */
4587         ir_node *header_block = new_immBlock();
4588         if (jmp != NULL) {
4589                 add_immBlock_pred(header_block, jmp);
4590         }
4591
4592         /* the loop body */
4593         ir_node *old_continue_label = continue_label;
4594         ir_node *old_break_label    = break_label;
4595         continue_label              = header_block;
4596         break_label                 = NULL;
4597
4598         ir_node *body_block = new_immBlock();
4599         set_cur_block(body_block);
4600         statement_to_firm(statement->body);
4601         ir_node *false_block = break_label;
4602
4603         assert(continue_label == header_block);
4604         continue_label = old_continue_label;
4605         break_label    = old_break_label;
4606
4607         if (get_cur_block() != NULL) {
4608                 jmp = new_Jmp();
4609                 add_immBlock_pred(header_block, jmp);
4610         }
4611
4612         /* shortcut for while(true) */
4613         if (is_constant_expression(statement->condition)
4614                         && fold_constant(statement->condition) != 0) {
4615                 set_cur_block(header_block);
4616                 ir_node *header_jmp = new_Jmp();
4617                 add_immBlock_pred(body_block, header_jmp);
4618
4619                 keep_alive(body_block);
4620                 keep_all_memory(body_block);
4621                 set_cur_block(body_block);
4622         } else {
4623                 if (false_block == NULL) {
4624                         false_block = new_immBlock();
4625                 }
4626
4627                 /* create the condition */
4628                 set_cur_block(header_block);
4629
4630                 create_condition_evaluation(statement->condition, body_block,
4631                                             false_block);
4632         }
4633
4634         mature_immBlock(body_block);
4635         mature_immBlock(header_block);
4636         if (false_block != NULL) {
4637                 mature_immBlock(false_block);
4638         }
4639
4640         set_cur_block(false_block);
4641 }
4642
4643 static void do_while_statement_to_firm(do_while_statement_t *statement)
4644 {
4645         ir_node *jmp = NULL;
4646         if (get_cur_block() != NULL) {
4647                 jmp = new_Jmp();
4648         }
4649
4650         /* create the header block */
4651         ir_node *header_block = new_immBlock();
4652
4653         /* the loop body */
4654         ir_node *body_block = new_immBlock();
4655         if (jmp != NULL) {
4656                 add_immBlock_pred(body_block, jmp);
4657         }
4658
4659         ir_node *old_continue_label = continue_label;
4660         ir_node *old_break_label    = break_label;
4661         continue_label              = header_block;
4662         break_label                 = NULL;
4663
4664         set_cur_block(body_block);
4665         statement_to_firm(statement->body);
4666         ir_node *false_block = break_label;
4667
4668         assert(continue_label == header_block);
4669         continue_label = old_continue_label;
4670         break_label    = old_break_label;
4671
4672         if (get_cur_block() != NULL) {
4673                 ir_node *body_jmp = new_Jmp();
4674                 add_immBlock_pred(header_block, body_jmp);
4675                 mature_immBlock(header_block);
4676         }
4677
4678         if (false_block == NULL) {
4679                 false_block = new_immBlock();
4680         }
4681
4682         /* create the condition */
4683         set_cur_block(header_block);
4684
4685         create_condition_evaluation(statement->condition, body_block, false_block);
4686         mature_immBlock(body_block);
4687         mature_immBlock(header_block);
4688         mature_immBlock(false_block);
4689
4690         set_cur_block(false_block);
4691 }
4692
4693 static void for_statement_to_firm(for_statement_t *statement)
4694 {
4695         ir_node *jmp = NULL;
4696
4697         /* create declarations */
4698         entity_t *entity = statement->scope.entities;
4699         for ( ; entity != NULL; entity = entity->base.next) {
4700                 if (!is_declaration(entity))
4701                         continue;
4702
4703                 create_local_declaration(entity);
4704         }
4705
4706         if (get_cur_block() != NULL) {
4707                 entity = statement->scope.entities;
4708                 for ( ; entity != NULL; entity = entity->base.next) {
4709                         if (!is_declaration(entity))
4710                                 continue;
4711
4712                         initialize_local_declaration(entity);
4713                 }
4714
4715                 if (statement->initialisation != NULL) {
4716                         expression_to_firm(statement->initialisation);
4717                 }
4718
4719                 jmp = new_Jmp();
4720         }
4721
4722
4723         /* create the step block */
4724         ir_node *const step_block = new_immBlock();
4725         set_cur_block(step_block);
4726         if (statement->step != NULL) {
4727                 expression_to_firm(statement->step);
4728         }
4729         ir_node *const step_jmp = new_Jmp();
4730
4731         /* create the header block */
4732         ir_node *const header_block = new_immBlock();
4733         set_cur_block(header_block);
4734         if (jmp != NULL) {
4735                 add_immBlock_pred(header_block, jmp);
4736         }
4737         add_immBlock_pred(header_block, step_jmp);
4738
4739         /* the false block */
4740         ir_node *const false_block = new_immBlock();
4741
4742         /* the loop body */
4743         ir_node *body_block;
4744         if (statement->body != NULL) {
4745                 ir_node *const old_continue_label = continue_label;
4746                 ir_node *const old_break_label    = break_label;
4747                 continue_label = step_block;
4748                 break_label    = false_block;
4749
4750                 body_block = new_immBlock();
4751                 set_cur_block(body_block);
4752                 statement_to_firm(statement->body);
4753
4754                 assert(continue_label == step_block);
4755                 assert(break_label    == false_block);
4756                 continue_label = old_continue_label;
4757                 break_label    = old_break_label;
4758
4759                 if (get_cur_block() != NULL) {
4760                         jmp = new_Jmp();
4761                         add_immBlock_pred(step_block, jmp);
4762                 }
4763         } else {
4764                 body_block = step_block;
4765         }
4766
4767         /* create the condition */
4768         set_cur_block(header_block);
4769         if (statement->condition != NULL) {
4770                 create_condition_evaluation(statement->condition, body_block,
4771                                             false_block);
4772         } else {
4773                 keep_alive(header_block);
4774                 keep_all_memory(header_block);
4775                 jmp = new_Jmp();
4776                 add_immBlock_pred(body_block, jmp);
4777         }
4778
4779         mature_immBlock(body_block);
4780         mature_immBlock(false_block);
4781         mature_immBlock(step_block);
4782         mature_immBlock(header_block);
4783         mature_immBlock(false_block);
4784
4785         set_cur_block(false_block);
4786 }
4787
4788 static void create_jump_statement(const statement_t *statement,
4789                                   ir_node *target_block)
4790 {
4791         if (get_cur_block() == NULL)
4792                 return;
4793
4794         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4795         ir_node  *jump = new_d_Jmp(dbgi);
4796         add_immBlock_pred(target_block, jump);
4797
4798         set_cur_block(NULL);
4799 }
4800
4801 static ir_node *get_break_label(void)
4802 {
4803         if (break_label == NULL) {
4804                 break_label = new_immBlock();
4805         }
4806         return break_label;
4807 }
4808
4809 static void switch_statement_to_firm(switch_statement_t *statement)
4810 {
4811         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4812
4813         ir_node *expression  = expression_to_firm(statement->expression);
4814         ir_node *cond        = new_d_Cond(dbgi, expression);
4815
4816         set_cur_block(NULL);
4817
4818         ir_node *const old_switch_cond       = current_switch_cond;
4819         ir_node *const old_break_label       = break_label;
4820         const bool     old_saw_default_label = saw_default_label;
4821         saw_default_label                    = false;
4822         current_switch_cond                  = cond;
4823         break_label                          = NULL;
4824         switch_statement_t *const old_switch = current_switch;
4825         current_switch                       = statement;
4826
4827         /* determine a free number for the default label */
4828         unsigned long num_cases = 0;
4829         long def_nr = 0;
4830         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4831                 if (l->expression == NULL) {
4832                         /* default case */
4833                         continue;
4834                 }
4835                 if (l->last_case >= l->first_case)
4836                         num_cases += l->last_case - l->first_case + 1;
4837                 if (l->last_case > def_nr)
4838                         def_nr = l->last_case;
4839         }
4840
4841         if (def_nr == INT_MAX) {
4842                 /* Bad: an overflow will occurr, we cannot be sure that the
4843                  * maximum + 1 is a free number. Scan the values a second
4844                  * time to find a free number.
4845                  */
4846                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4847
4848                 memset(bits, 0, (num_cases + 7) >> 3);
4849                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4850                         if (l->expression == NULL) {
4851                                 /* default case */
4852                                 continue;
4853                         }
4854                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4855                         if (start < num_cases && l->last_case >= 0) {
4856                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4857                                         (unsigned long)l->last_case : num_cases - 1;
4858                                 for (unsigned long cns = start; cns <= end; ++cns) {
4859                                         bits[cns >> 3] |= (1 << (cns & 7));
4860                                 }
4861                         }
4862                 }
4863                 /* We look at the first num_cases constants:
4864                  * Either they are densed, so we took the last (num_cases)
4865                  * one, or they are non densed, so we will find one free
4866                  * there...
4867                  */
4868                 unsigned long i;
4869                 for (i = 0; i < num_cases; ++i)
4870                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4871                                 break;
4872
4873                 free(bits);
4874                 def_nr = i;
4875         } else {
4876                 ++def_nr;
4877         }
4878         statement->default_proj_nr = def_nr;
4879
4880         if (statement->body != NULL) {
4881                 statement_to_firm(statement->body);
4882         }
4883
4884         if (get_cur_block() != NULL) {
4885                 ir_node *jmp = new_Jmp();
4886                 add_immBlock_pred(get_break_label(), jmp);
4887         }
4888
4889         if (!saw_default_label) {
4890                 set_cur_block(get_nodes_block(cond));
4891                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4892                                                         statement->default_proj_nr);
4893                 add_immBlock_pred(get_break_label(), proj);
4894         }
4895
4896         if (break_label != NULL) {
4897                 mature_immBlock(break_label);
4898         }
4899         set_cur_block(break_label);
4900
4901         assert(current_switch_cond == cond);
4902         current_switch      = old_switch;
4903         current_switch_cond = old_switch_cond;
4904         break_label         = old_break_label;
4905         saw_default_label   = old_saw_default_label;
4906 }
4907
4908 static void case_label_to_firm(const case_label_statement_t *statement)
4909 {
4910         if (statement->is_empty_range)
4911                 return;
4912
4913         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4914
4915         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4916
4917         ir_node *proj;
4918         ir_node *block     = new_immBlock();
4919
4920         set_cur_block(get_nodes_block(current_switch_cond));
4921         if (statement->expression != NULL) {
4922                 long pn     = statement->first_case;
4923                 long end_pn = statement->last_case;
4924                 assert(pn <= end_pn);
4925                 /* create jumps for all cases in the given range */
4926                 do {
4927                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4928                         add_immBlock_pred(block, proj);
4929                 } while(pn++ < end_pn);
4930         } else {
4931                 saw_default_label = true;
4932                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4933                                          current_switch->default_proj_nr);
4934
4935                 add_immBlock_pred(block, proj);
4936         }
4937
4938         if (fallthrough != NULL) {
4939                 add_immBlock_pred(block, fallthrough);
4940         }
4941         mature_immBlock(block);
4942         set_cur_block(block);
4943
4944         if (statement->statement != NULL) {
4945                 statement_to_firm(statement->statement);
4946         }
4947 }
4948
4949 static void label_to_firm(const label_statement_t *statement)
4950 {
4951         ir_node *block = get_label_block(statement->label);
4952
4953         if (get_cur_block() != NULL) {
4954                 ir_node *jmp = new_Jmp();
4955                 add_immBlock_pred(block, jmp);
4956         }
4957
4958         set_cur_block(block);
4959         keep_alive(block);
4960         keep_all_memory(block);
4961
4962         if (statement->statement != NULL) {
4963                 statement_to_firm(statement->statement);
4964         }
4965 }
4966
4967 static void goto_to_firm(const goto_statement_t *statement)
4968 {
4969         if (get_cur_block() == NULL)
4970                 return;
4971
4972         if (statement->expression) {
4973                 ir_node  *irn  = expression_to_firm(statement->expression);
4974                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4975                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4976
4977                 set_irn_link(ijmp, ijmp_list);
4978                 ijmp_list = ijmp;
4979         } else {
4980                 ir_node *block = get_label_block(statement->label);
4981                 ir_node *jmp   = new_Jmp();
4982                 add_immBlock_pred(block, jmp);
4983         }
4984         set_cur_block(NULL);
4985 }
4986
4987 static void asm_statement_to_firm(const asm_statement_t *statement)
4988 {
4989         bool needs_memory = false;
4990
4991         if (statement->is_volatile) {
4992                 needs_memory = true;
4993         }
4994
4995         size_t         n_clobbers = 0;
4996         asm_clobber_t *clobber    = statement->clobbers;
4997         for ( ; clobber != NULL; clobber = clobber->next) {
4998                 const char *clobber_str = clobber->clobber.begin;
4999
5000                 if (!be_is_valid_clobber(clobber_str)) {
5001                         errorf(&statement->base.source_position,
5002                                    "invalid clobber '%s' specified", clobber->clobber);
5003                         continue;
5004                 }
5005
5006                 if (strcmp(clobber_str, "memory") == 0) {
5007                         needs_memory = true;
5008                         continue;
5009                 }
5010
5011                 ident *id = new_id_from_str(clobber_str);
5012                 obstack_ptr_grow(&asm_obst, id);
5013                 ++n_clobbers;
5014         }
5015         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5016         ident **clobbers = NULL;
5017         if (n_clobbers > 0) {
5018                 clobbers = obstack_finish(&asm_obst);
5019         }
5020
5021         size_t n_inputs  = 0;
5022         asm_argument_t *argument = statement->inputs;
5023         for ( ; argument != NULL; argument = argument->next)
5024                 n_inputs++;
5025         size_t n_outputs = 0;
5026         argument = statement->outputs;
5027         for ( ; argument != NULL; argument = argument->next)
5028                 n_outputs++;
5029
5030         unsigned next_pos = 0;
5031
5032         ir_node *ins[n_inputs + n_outputs + 1];
5033         size_t   in_size = 0;
5034
5035         ir_asm_constraint tmp_in_constraints[n_outputs];
5036
5037         const expression_t *out_exprs[n_outputs];
5038         ir_node            *out_addrs[n_outputs];
5039         size_t              out_size = 0;
5040
5041         argument = statement->outputs;
5042         for ( ; argument != NULL; argument = argument->next) {
5043                 const char *constraints = argument->constraints.begin;
5044                 asm_constraint_flags_t asm_flags
5045                         = be_parse_asm_constraints(constraints);
5046
5047                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5048                         warningf(&statement->base.source_position,
5049                                "some constraints in '%s' are not supported", constraints);
5050                 }
5051                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5052                         errorf(&statement->base.source_position,
5053                                "some constraints in '%s' are invalid", constraints);
5054                         continue;
5055                 }
5056                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5057                         errorf(&statement->base.source_position,
5058                                "no write flag specified for output constraints '%s'",
5059                                constraints);
5060                         continue;
5061                 }
5062
5063                 unsigned pos = next_pos++;
5064                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5065                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5066                         expression_t *expr = argument->expression;
5067                         ir_node      *addr = expression_to_addr(expr);
5068                         /* in+output, construct an artifical same_as constraint on the
5069                          * input */
5070                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5071                                 char     buf[64];
5072                                 ir_node *value = get_value_from_lvalue(expr, addr);
5073
5074                                 snprintf(buf, sizeof(buf), "%u", pos);
5075
5076                                 ir_asm_constraint constraint;
5077                                 constraint.pos              = pos;
5078                                 constraint.constraint       = new_id_from_str(buf);
5079                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5080                                 tmp_in_constraints[in_size] = constraint;
5081                                 ins[in_size] = value;
5082
5083                                 ++in_size;
5084                         }
5085
5086                         out_exprs[out_size] = expr;
5087                         out_addrs[out_size] = addr;
5088                         ++out_size;
5089                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5090                         /* pure memory ops need no input (but we have to make sure we
5091                          * attach to the memory) */
5092                         assert(! (asm_flags &
5093                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5094                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5095                         needs_memory = true;
5096
5097                         /* we need to attach the address to the inputs */
5098                         expression_t *expr = argument->expression;
5099
5100                         ir_asm_constraint constraint;
5101                         constraint.pos              = pos;
5102                         constraint.constraint       = new_id_from_str(constraints);
5103                         constraint.mode             = NULL;
5104                         tmp_in_constraints[in_size] = constraint;
5105
5106                         ins[in_size]          = expression_to_addr(expr);
5107                         ++in_size;
5108                         continue;
5109                 } else {
5110                         errorf(&statement->base.source_position,
5111                                "only modifiers but no place set in constraints '%s'",
5112                                constraints);
5113                         continue;
5114                 }
5115
5116                 ir_asm_constraint constraint;
5117                 constraint.pos        = pos;
5118                 constraint.constraint = new_id_from_str(constraints);
5119                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5120
5121                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5122         }
5123         assert(obstack_object_size(&asm_obst)
5124                         == out_size * sizeof(ir_asm_constraint));
5125         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5126
5127
5128         obstack_grow(&asm_obst, tmp_in_constraints,
5129                      in_size * sizeof(tmp_in_constraints[0]));
5130         /* find and count input and output arguments */
5131         argument = statement->inputs;
5132         for ( ; argument != NULL; argument = argument->next) {
5133                 const char *constraints = argument->constraints.begin;
5134                 asm_constraint_flags_t asm_flags
5135                         = be_parse_asm_constraints(constraints);
5136
5137                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5138                         errorf(&statement->base.source_position,
5139                                "some constraints in '%s' are not supported", constraints);
5140                         continue;
5141                 }
5142                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5143                         errorf(&statement->base.source_position,
5144                                "some constraints in '%s' are invalid", constraints);
5145                         continue;
5146                 }
5147                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5148                         errorf(&statement->base.source_position,
5149                                "write flag specified for input constraints '%s'",
5150                                constraints);
5151                         continue;
5152                 }
5153
5154                 ir_node *input;
5155                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5156                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5157                         /* we can treat this as "normal" input */
5158                         input = expression_to_firm(argument->expression);
5159                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5160                         /* pure memory ops need no input (but we have to make sure we
5161                          * attach to the memory) */
5162                         assert(! (asm_flags &
5163                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5164                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5165                         needs_memory = true;
5166                         input = expression_to_addr(argument->expression);
5167                 } else {
5168                         errorf(&statement->base.source_position,
5169                                "only modifiers but no place set in constraints '%s'",
5170                                constraints);
5171                         continue;
5172                 }
5173
5174                 ir_asm_constraint constraint;
5175                 constraint.pos        = next_pos++;
5176                 constraint.constraint = new_id_from_str(constraints);
5177                 constraint.mode       = get_irn_mode(input);
5178
5179                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5180                 ins[in_size++] = input;
5181         }
5182
5183         if (needs_memory) {
5184                 ir_asm_constraint constraint;
5185                 constraint.pos        = next_pos++;
5186                 constraint.constraint = new_id_from_str("");
5187                 constraint.mode       = mode_M;
5188
5189                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5190                 ins[in_size++] = get_store();
5191         }
5192
5193         assert(obstack_object_size(&asm_obst)
5194                         == in_size * sizeof(ir_asm_constraint));
5195         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5196
5197         /* create asm node */
5198         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5199
5200         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5201
5202         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5203                                   out_size, output_constraints,
5204                                   n_clobbers, clobbers, asm_text);
5205
5206         if (statement->is_volatile) {
5207                 set_irn_pinned(node, op_pin_state_pinned);
5208         } else {
5209                 set_irn_pinned(node, op_pin_state_floats);
5210         }
5211
5212         /* create output projs & connect them */
5213         if (needs_memory) {
5214                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5215                 set_store(projm);
5216         }
5217
5218         size_t i;
5219         for (i = 0; i < out_size; ++i) {
5220                 const expression_t *out_expr = out_exprs[i];
5221                 long                pn       = i;
5222                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5223                 ir_node            *proj     = new_Proj(node, mode, pn);
5224                 ir_node            *addr     = out_addrs[i];
5225
5226                 set_value_for_expression_addr(out_expr, proj, addr);
5227         }
5228 }
5229
5230 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5231 {
5232         statement_to_firm(statement->try_statement);
5233         warningf(&statement->base.source_position, "structured exception handling ignored");
5234 }
5235
5236 static void     leave_statement_to_firm(leave_statement_t *statement)
5237 {
5238         errorf(&statement->base.source_position, "__leave not supported yet");
5239 }
5240
5241 /**
5242  * Transform a statement.
5243  */
5244 static void statement_to_firm(statement_t *statement)
5245 {
5246 #ifndef NDEBUG
5247         assert(!statement->base.transformed);
5248         statement->base.transformed = true;
5249 #endif
5250
5251         switch (statement->kind) {
5252         case STATEMENT_INVALID:
5253                 panic("invalid statement found");
5254         case STATEMENT_EMPTY:
5255                 /* nothing */
5256                 return;
5257         case STATEMENT_COMPOUND:
5258                 compound_statement_to_firm(&statement->compound);
5259                 return;
5260         case STATEMENT_RETURN:
5261                 return_statement_to_firm(&statement->returns);
5262                 return;
5263         case STATEMENT_EXPRESSION:
5264                 expression_statement_to_firm(&statement->expression);
5265                 return;
5266         case STATEMENT_IF:
5267                 if_statement_to_firm(&statement->ifs);
5268                 return;
5269         case STATEMENT_WHILE:
5270                 while_statement_to_firm(&statement->whiles);
5271                 return;
5272         case STATEMENT_DO_WHILE:
5273                 do_while_statement_to_firm(&statement->do_while);
5274                 return;
5275         case STATEMENT_DECLARATION:
5276                 declaration_statement_to_firm(&statement->declaration);
5277                 return;
5278         case STATEMENT_BREAK:
5279                 create_jump_statement(statement, get_break_label());
5280                 return;
5281         case STATEMENT_CONTINUE:
5282                 create_jump_statement(statement, continue_label);
5283                 return;
5284         case STATEMENT_SWITCH:
5285                 switch_statement_to_firm(&statement->switchs);
5286                 return;
5287         case STATEMENT_CASE_LABEL:
5288                 case_label_to_firm(&statement->case_label);
5289                 return;
5290         case STATEMENT_FOR:
5291                 for_statement_to_firm(&statement->fors);
5292                 return;
5293         case STATEMENT_LABEL:
5294                 label_to_firm(&statement->label);
5295                 return;
5296         case STATEMENT_GOTO:
5297                 goto_to_firm(&statement->gotos);
5298                 return;
5299         case STATEMENT_ASM:
5300                 asm_statement_to_firm(&statement->asms);
5301                 return;
5302         case STATEMENT_MS_TRY:
5303                 ms_try_statement_to_firm(&statement->ms_try);
5304                 return;
5305         case STATEMENT_LEAVE:
5306                 leave_statement_to_firm(&statement->leave);
5307                 return;
5308         }
5309         panic("statement not implemented");
5310 }
5311
5312 static int count_local_variables(const entity_t *entity,
5313                                  const entity_t *const last)
5314 {
5315         int count = 0;
5316         entity_t const *const end = last != NULL ? last->base.next : NULL;
5317         for (; entity != end; entity = entity->base.next) {
5318                 type_t *type;
5319                 bool    address_taken;
5320
5321                 if (entity->kind == ENTITY_VARIABLE) {
5322                         type          = skip_typeref(entity->declaration.type);
5323                         address_taken = entity->variable.address_taken;
5324                 } else if (entity->kind == ENTITY_PARAMETER) {
5325                         type          = skip_typeref(entity->declaration.type);
5326                         address_taken = entity->parameter.address_taken;
5327                 } else {
5328                         continue;
5329                 }
5330
5331                 if (!address_taken && is_type_scalar(type))
5332                         ++count;
5333         }
5334         return count;
5335 }
5336
5337 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5338 {
5339         int *const count = env;
5340
5341         switch (stmt->kind) {
5342         case STATEMENT_DECLARATION: {
5343                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5344                 *count += count_local_variables(decl_stmt->declarations_begin,
5345                                 decl_stmt->declarations_end);
5346                 break;
5347         }
5348
5349         case STATEMENT_FOR:
5350                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5351                 break;
5352
5353         default:
5354                 break;
5355         }
5356 }
5357
5358 static int get_function_n_local_vars(entity_t *entity)
5359 {
5360         int count = 0;
5361
5362         /* count parameters */
5363         count += count_local_variables(entity->function.parameters.entities, NULL);
5364
5365         /* count local variables declared in body */
5366         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5367                         &count);
5368         return count;
5369 }
5370
5371 static void initialize_function_parameters(entity_t *entity)
5372 {
5373         assert(entity->kind == ENTITY_FUNCTION);
5374         ir_graph *irg             = current_ir_graph;
5375         ir_node  *args            = get_irg_args(irg);
5376         ir_node  *start_block     = get_irg_start_block(irg);
5377         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5378
5379         int       n         = 0;
5380         entity_t *parameter = entity->function.parameters.entities;
5381         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5382                 if (parameter->kind != ENTITY_PARAMETER)
5383                         continue;
5384
5385                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5386                 type_t *type = skip_typeref(parameter->declaration.type);
5387
5388                 bool needs_entity = parameter->parameter.address_taken;
5389                 assert(!is_type_array(type));
5390                 if (is_type_compound(type)) {
5391                         needs_entity = true;
5392                 }
5393
5394                 if (needs_entity) {
5395                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5396                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5397                         set_entity_ident(entity, id);
5398
5399                         parameter->declaration.kind
5400                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5401                         parameter->parameter.v.entity = entity;
5402                         continue;
5403                 }
5404
5405                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5406                 ir_mode *param_mode   = get_type_mode(param_irtype);
5407
5408                 long     pn    = n;
5409                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5410
5411                 ir_mode *mode = get_ir_mode_storage(type);
5412                 value = create_conv(NULL, value, mode);
5413                 value = do_strict_conv(NULL, value);
5414
5415                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5416                 parameter->parameter.v.value_number = next_value_number_function;
5417                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5418                                         parameter);
5419                 ++next_value_number_function;
5420
5421                 set_value(parameter->parameter.v.value_number, value);
5422         }
5423 }
5424
5425 /**
5426  * Handle additional decl modifiers for IR-graphs
5427  *
5428  * @param irg            the IR-graph
5429  * @param dec_modifiers  additional modifiers
5430  */
5431 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5432 {
5433         if (decl_modifiers & DM_RETURNS_TWICE) {
5434                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5435                 set_irg_additional_property(irg, mtp_property_returns_twice);
5436         }
5437         if (decl_modifiers & DM_NORETURN) {
5438                 /* TRUE if the declaration includes the Microsoft
5439                    __declspec(noreturn) specifier. */
5440                 set_irg_additional_property(irg, mtp_property_noreturn);
5441         }
5442         if (decl_modifiers & DM_NOTHROW) {
5443                 /* TRUE if the declaration includes the Microsoft
5444                    __declspec(nothrow) specifier. */
5445                 set_irg_additional_property(irg, mtp_property_nothrow);
5446         }
5447         if (decl_modifiers & DM_NAKED) {
5448                 /* TRUE if the declaration includes the Microsoft
5449                    __declspec(naked) specifier. */
5450                 set_irg_additional_property(irg, mtp_property_naked);
5451         }
5452         if (decl_modifiers & DM_FORCEINLINE) {
5453                 /* TRUE if the declaration includes the
5454                    Microsoft __forceinline specifier. */
5455                 set_irg_inline_property(irg, irg_inline_forced);
5456         }
5457         if (decl_modifiers & DM_NOINLINE) {
5458                 /* TRUE if the declaration includes the Microsoft
5459                    __declspec(noinline) specifier. */
5460                 set_irg_inline_property(irg, irg_inline_forbidden);
5461         }
5462 }
5463
5464 static void add_function_pointer(ir_type *segment, ir_entity *method,
5465                                  const char *unique_template)
5466 {
5467         ir_type   *method_type  = get_entity_type(method);
5468         ident     *id           = id_unique(unique_template);
5469         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5470
5471         ident     *ide          = id_unique(unique_template);
5472         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5473         ir_graph  *irg          = get_const_code_irg();
5474         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5475                                                            method, NULL);
5476
5477         set_entity_compiler_generated(ptr, 1);
5478         set_entity_variability(ptr, variability_constant);
5479         set_atomic_ent_value(ptr, val);
5480 }
5481
5482 /**
5483  * Generate possible IJmp branches to a given label block.
5484  */
5485 static void gen_ijmp_branches(ir_node *block)
5486 {
5487         ir_node *ijmp;
5488         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5489                 add_immBlock_pred(block, ijmp);
5490         }
5491 }
5492
5493 /**
5494  * Create code for a function.
5495  */
5496 static void create_function(entity_t *entity)
5497 {
5498         assert(entity->kind == ENTITY_FUNCTION);
5499         ir_entity *function_entity = get_function_entity(entity);
5500
5501         if (entity->function.statement == NULL)
5502                 return;
5503
5504         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5505                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5506                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5507         }
5508         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5509                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5510                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5511         }
5512
5513         current_function_entity = entity;
5514         current_function_name   = NULL;
5515         current_funcsig         = NULL;
5516
5517         assert(all_labels == NULL);
5518         all_labels = NEW_ARR_F(label_t *, 0);
5519         ijmp_list  = NULL;
5520
5521         int       n_local_vars = get_function_n_local_vars(entity);
5522         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5523
5524         ir_graph *old_current_function = current_function;
5525         current_function = irg;
5526
5527         set_irg_fp_model(irg, firm_opt.fp_model);
5528         tarval_enable_fp_ops(1);
5529         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5530
5531         ir_node *first_block = get_cur_block();
5532
5533         /* set inline flags */
5534         if (entity->function.is_inline)
5535                 set_irg_inline_property(irg, irg_inline_recomended);
5536         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5537
5538         next_value_number_function = 0;
5539         initialize_function_parameters(entity);
5540
5541         statement_to_firm(entity->function.statement);
5542
5543         ir_node *end_block = get_irg_end_block(irg);
5544
5545         /* do we have a return statement yet? */
5546         if (get_cur_block() != NULL) {
5547                 type_t *type = skip_typeref(entity->declaration.type);
5548                 assert(is_type_function(type));
5549                 const function_type_t *func_type   = &type->function;
5550                 const type_t          *return_type
5551                         = skip_typeref(func_type->return_type);
5552
5553                 ir_node *ret;
5554                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5555                         ret = new_Return(get_store(), 0, NULL);
5556                 } else {
5557                         ir_mode *mode;
5558                         if (is_type_scalar(return_type)) {
5559                                 mode = get_ir_mode_storage(func_type->return_type);
5560                         } else {
5561                                 mode = mode_P_data;
5562                         }
5563
5564                         ir_node *in[1];
5565                         /* §5.1.2.2.3 main implicitly returns 0 */
5566                         if (is_main(entity)) {
5567                                 in[0] = new_Const(get_mode_null(mode));
5568                         } else {
5569                                 in[0] = new_Unknown(mode);
5570                         }
5571                         ret = new_Return(get_store(), 1, in);
5572                 }
5573                 add_immBlock_pred(end_block, ret);
5574         }
5575
5576         bool has_computed_gotos = false;
5577         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5578                 label_t *label = all_labels[i];
5579                 if (label->address_taken) {
5580                         gen_ijmp_branches(label->block);
5581                         has_computed_gotos = true;
5582                 }
5583                 mature_immBlock(label->block);
5584         }
5585         if (has_computed_gotos) {
5586                 /* if we have computed goto's in the function, we cannot inline it */
5587                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5588                         warningf(&entity->base.source_position,
5589                                  "function '%Y' can never be inlined because it contains a computed goto",
5590                                  entity->base.symbol);
5591                 }
5592                 set_irg_inline_property(irg, irg_inline_forbidden);
5593         }
5594
5595         DEL_ARR_F(all_labels);
5596         all_labels = NULL;
5597
5598         mature_immBlock(first_block);
5599         mature_immBlock(end_block);
5600
5601         irg_finalize_cons(irg);
5602
5603         /* finalize the frame type */
5604         ir_type *frame_type = get_irg_frame_type(irg);
5605         int      n          = get_compound_n_members(frame_type);
5606         int      align_all  = 4;
5607         int      offset     = 0;
5608         for (int i = 0; i < n; ++i) {
5609                 ir_entity *entity      = get_compound_member(frame_type, i);
5610                 ir_type   *entity_type = get_entity_type(entity);
5611
5612                 int align = get_type_alignment_bytes(entity_type);
5613                 if (align > align_all)
5614                         align_all = align;
5615                 int misalign = 0;
5616                 if (align > 0) {
5617                         misalign  = offset % align;
5618                         if (misalign > 0) {
5619                                 offset += align - misalign;
5620                         }
5621                 }
5622
5623                 set_entity_offset(entity, offset);
5624                 offset += get_type_size_bytes(entity_type);
5625         }
5626         set_type_size_bytes(frame_type, offset);
5627         set_type_alignment_bytes(frame_type, align_all);
5628
5629         irg_vrfy(irg);
5630         current_function = old_current_function;
5631
5632         /* create inner functions */
5633         entity_t *inner;
5634         for (inner = next_inner_function(); inner != NULL;
5635              inner = next_inner_function()) {
5636                 create_function(inner);
5637         }
5638 }
5639
5640 static void scope_to_firm(scope_t *scope)
5641 {
5642         /* first pass: create declarations */
5643         entity_t *entity = scope->entities;
5644         for ( ; entity != NULL; entity = entity->base.next) {
5645                 if (entity->base.symbol == NULL)
5646                         continue;
5647
5648                 if (entity->kind == ENTITY_FUNCTION) {
5649                         get_function_entity(entity);
5650                 } else if (entity->kind == ENTITY_VARIABLE) {
5651                         create_global_variable(entity);
5652                 }
5653         }
5654
5655         /* second pass: create code/initializers */
5656         entity = scope->entities;
5657         for ( ; entity != NULL; entity = entity->base.next) {
5658                 if (entity->base.symbol == NULL)
5659                         continue;
5660
5661                 if (entity->kind == ENTITY_FUNCTION) {
5662                         create_function(entity);
5663                 } else if (entity->kind == ENTITY_VARIABLE) {
5664                         assert(entity->declaration.kind
5665                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5666                         current_ir_graph = get_const_code_irg();
5667                         create_variable_initializer(entity);
5668                 }
5669         }
5670 }
5671
5672 void init_ast2firm(void)
5673 {
5674         obstack_init(&asm_obst);
5675         init_atomic_modes();
5676
5677         /* OS option must be set to the backend */
5678         switch (firm_opt.os_support) {
5679         case OS_SUPPORT_MINGW:
5680                 create_ld_ident = create_name_win32;
5681                 break;
5682         case OS_SUPPORT_LINUX:
5683                 create_ld_ident = create_name_linux_elf;
5684                 break;
5685         case OS_SUPPORT_MACHO:
5686                 create_ld_ident = create_name_macho;
5687                 break;
5688         default:
5689                 panic("unexpected OS support mode");
5690         }
5691
5692         /* create idents for all known runtime functions */
5693         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5694                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5695         }
5696
5697         entitymap_init(&entitymap);
5698 }
5699
5700 static void init_ir_types(void)
5701 {
5702         static int ir_types_initialized = 0;
5703         if (ir_types_initialized)
5704                 return;
5705         ir_types_initialized = 1;
5706
5707         ir_type_int        = get_ir_type(type_int);
5708         ir_type_const_char = get_ir_type(type_const_char);
5709         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5710         ir_type_void       = get_ir_type(type_void);
5711
5712         const backend_params *be_params = be_get_backend_param();
5713         mode_float_arithmetic = be_params->mode_float_arithmetic;
5714 }
5715
5716 void exit_ast2firm(void)
5717 {
5718         entitymap_destroy(&entitymap);
5719         obstack_free(&asm_obst, NULL);
5720 }
5721
5722 static void global_asm_to_firm(statement_t *s)
5723 {
5724         for (; s != NULL; s = s->base.next) {
5725                 assert(s->kind == STATEMENT_ASM);
5726
5727                 char const *const text = s->asms.asm_text.begin;
5728                 size_t            size = s->asms.asm_text.size;
5729
5730                 /* skip the last \0 */
5731                 if (text[size - 1] == '\0')
5732                         --size;
5733
5734                 ident *const id = new_id_from_chars(text, size);
5735                 add_irp_asm(id);
5736         }
5737 }
5738
5739 void translation_unit_to_firm(translation_unit_t *unit)
5740 {
5741         /* just to be sure */
5742         continue_label           = NULL;
5743         break_label              = NULL;
5744         current_switch_cond      = NULL;
5745         current_translation_unit = unit;
5746
5747         init_ir_types();
5748         inner_functions = NEW_ARR_F(entity_t *, 0);
5749
5750         scope_to_firm(&unit->scope);
5751         global_asm_to_firm(unit->global_asm);
5752
5753         DEL_ARR_F(inner_functions);
5754         inner_functions  = NULL;
5755
5756         current_ir_graph         = NULL;
5757         current_translation_unit = NULL;
5758 }