nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25
  26 #include <libfirm/firm.h>
  27 #include <libfirm/adt/obst.h>
  28 #include <libfirm/be.h>
  29
  30 #include "ast2firm.h"
  31
  32 #include "adt/error.h"
  33 #include "adt/array.h"
  34 #include "symbol_t.h"
  35 #include "token_t.h"
  36 #include "type_t.h"
  37 #include "ast_t.h"
  38 #include "parser.h"
  39 #include "diagnostic.h"
  40 #include "lang_features.h"
  41 #include "types.h"
  42 #include "warning.h"
  43 #include "entitymap_t.h"
  44 #include "driver/firm_opt.h"
  45 #include "driver/firm_cmdline.h"
  46
  47 /* some idents needed for name mangling */
  48 static ident *id_underscore;
  49 static ident *id_imp;
  50
  51 static ir_type *ir_type_const_char;
  52 static ir_type *ir_type_wchar_t;
  53 static ir_type *ir_type_void;
  54 static ir_type *ir_type_int;
  55
  56 static int             next_value_number_function;
  57 static ir_node        *continue_label;
  58 static ir_node        *break_label;
  59 static ir_node        *current_switch_cond;
  60 static bool            saw_default_label;
  61 static declaration_t **all_labels;
  62 static ir_node        *ijmp_list;
  63 static bool            constant_folding;
  64
  65 static const declaration_t *current_function_decl;
  66 static ir_node             *current_function_name;
  67 static ir_node             *current_funcsig;
  68 static switch_statement_t  *current_switch;
  69 static ir_graph            *current_function;
  70
  71 static entitymap_t  entitymap;
  72
  73 static struct obstack asm_obst;
  74
  75 typedef enum declaration_kind_t {
  76         DECLARATION_KIND_UNKNOWN,
  77         DECLARATION_KIND_FUNCTION,
  78         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  79         DECLARATION_KIND_GLOBAL_VARIABLE,
  80         DECLARATION_KIND_LOCAL_VARIABLE,
  81         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  82         DECLARATION_KIND_COMPOUND_MEMBER,
  83         DECLARATION_KIND_LABEL_BLOCK,
  84         DECLARATION_KIND_ENUM_ENTRY,
  85         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  86         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  87         DECLARATION_KIND_TYPE
  88 } declaration_kind_t;
  89
  90 static ir_type *get_ir_type(type_t *type);
  91 static ir_type *get_ir_type_incomplete(type_t *type);
  92 static int count_decls_in_stmts(const statement_t *stmt);
  93
  94 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  95 {
  96         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  97
  98         if (declaration != NULL) {
  99                 warningf(&declaration->source_position,
 100                          "variable '%#T' might be used uninitialized",
 101                          declaration->type, declaration->symbol);
 102         }
 103         return new_r_Unknown(irg, mode);
 104 }
 105
 106 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 107 {
 108         const source_position_t *pos = (const source_position_t*) dbg;
 109         if (pos == NULL)
 110                 return 0;
 111         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 112                                    pos->linenr);
 113 }
 114
 115 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 116 {
 117         const source_position_t *pos = (const source_position_t*) dbg;
 118         if (pos == NULL)
 119                 return NULL;
 120         if (line != NULL)
 121                 *line = pos->linenr;
 122         return pos->input_name;
 123 }
 124
 125 static dbg_info *get_dbg_info(const source_position_t *pos)
 126 {
 127         return (dbg_info*) pos;
 128 }
 129
 130 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 131
 132 static ir_mode *mode_int, *mode_uint;
 133
 134 static ir_node *_expression_to_firm(const expression_t *expression);
 135 static ir_node *expression_to_firm(const expression_t *expression);
 136 static inline ir_mode *get_ir_mode(type_t *type);
 137 static void create_local_declaration(declaration_t *declaration);
 138
 139 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 140 {
 141         unsigned flags = get_atomic_type_flags(kind);
 142         unsigned size  = get_atomic_type_size(kind);
 143         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 144                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 145                 char            name[64];
 146                 ir_mode_sort    sort;
 147                 unsigned        bit_size     = size * 8;
 148                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 149                 ir_mode_arithmetic arithmetic;
 150                 unsigned        modulo_shift;
 151
 152                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 153                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 154                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 155                         sort         = irms_int_number;
 156                         arithmetic   = irma_twos_complement;
 157                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 158                 } else {
 159                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 160                         snprintf(name, sizeof(name), "f%d", bit_size);
 161                         sort         = irms_float_number;
 162                         arithmetic   = irma_ieee754;
 163                         modulo_shift = 0;
 164                 }
 165                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 166                                    modulo_shift);
 167         }
 168
 169         return NULL;
 170 }
 171
 172 /**
 173  * Initialises the atomic modes depending on the machine size.
 174  */
 175 static void init_atomic_modes(void)
 176 {
 177         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 178                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 179         }
 180         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 181         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 182
 183         /* there's no real void type in firm */
 184         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 185
 186         /* initialize pointer modes */
 187         char            name[64];
 188         ir_mode_sort    sort         = irms_reference;
 189         unsigned        bit_size     = machine_size;
 190         bool            is_signed    = 0;
 191         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 192         unsigned        modulo_shift
 193                 = bit_size < machine_size ? machine_size : bit_size;
 194
 195         snprintf(name, sizeof(name), "p%d", machine_size);
 196         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 197                                         modulo_shift);
 198
 199         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 200         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 201
 202         /* Hmm, pointers should be machine size */
 203         set_modeP_data(ptr_mode);
 204         set_modeP_code(ptr_mode);
 205 }
 206
 207 static unsigned get_compound_type_size(compound_type_t *type)
 208 {
 209         ir_type *irtype = get_ir_type((type_t*) type);
 210         return get_type_size_bytes(irtype);
 211 }
 212
 213 static unsigned get_array_type_size(array_type_t *type)
 214 {
 215         assert(!type->is_vla);
 216         ir_type *irtype = get_ir_type((type_t*) type);
 217         return get_type_size_bytes(irtype);
 218 }
 219
 220
 221 static unsigned get_type_size_const(type_t *type)
 222 {
 223         switch(type->kind) {
 224         case TYPE_ERROR:
 225                 panic("error type occurred");
 226         case TYPE_ATOMIC:
 227                 return get_atomic_type_size(type->atomic.akind);
 228         case TYPE_COMPLEX:
 229                 return 2 * get_atomic_type_size(type->complex.akind);
 230         case TYPE_IMAGINARY:
 231                 return get_atomic_type_size(type->imaginary.akind);
 232         case TYPE_ENUM:
 233                 return get_mode_size_bytes(mode_int);
 234         case TYPE_COMPOUND_UNION:
 235         case TYPE_COMPOUND_STRUCT:
 236                 return get_compound_type_size(&type->compound);
 237         case TYPE_FUNCTION:
 238                 /* just a pointer to the function */
 239                 return get_mode_size_bytes(mode_P_code);
 240         case TYPE_POINTER:
 241                 return get_mode_size_bytes(mode_P_data);
 242         case TYPE_ARRAY:
 243                 return get_array_type_size(&type->array);
 244         case TYPE_BUILTIN:
 245                 return get_type_size_const(type->builtin.real_type);
 246         case TYPE_BITFIELD:
 247                 panic("type size of bitfield request");
 248         case TYPE_TYPEDEF:
 249         case TYPE_TYPEOF:
 250         case TYPE_INVALID:
 251                 break;
 252         }
 253         panic("Trying to determine size of invalid type");
 254 }
 255
 256 static ir_node *get_type_size(type_t *type)
 257 {
 258         type = skip_typeref(type);
 259
 260         if (is_type_array(type) && type->array.is_vla) {
 261                 ir_node *size_node = type->array.size_node;
 262                 if (size_node == NULL) {
 263                         size_node = expression_to_firm(type->array.size_expression);
 264                         assert(!is_Const(size_node));
 265                         type->array.size_node = size_node;
 266                 }
 267
 268                 ir_node *elem_size = get_type_size(type->array.element_type);
 269                 ir_mode *mode      = get_irn_mode(size_node);
 270                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 271                 return real_size;
 272         }
 273
 274         ir_mode *mode = get_ir_mode(type_size_t);
 275         symconst_symbol sym;
 276         sym.type_p = get_ir_type(type);
 277         return new_SymConst(mode, sym, symconst_type_size);
 278 }
 279
 280 static unsigned count_parameters(const function_type_t *function_type)
 281 {
 282         unsigned count = 0;
 283
 284         function_parameter_t *parameter = function_type->parameters;
 285         for ( ; parameter != NULL; parameter = parameter->next) {
 286                 ++count;
 287         }
 288
 289         return count;
 290 }
 291
 292 /**
 293  * Creates a Firm type for an atomic type
 294  */
 295 static ir_type *create_atomic_type(const atomic_type_t *type)
 296 {
 297         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 298         atomic_type_kind_t  kind      = type->akind;
 299         ir_mode            *mode      = _atomic_modes[kind];
 300         ident              *id        = get_mode_ident(mode);
 301         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 302
 303         set_type_alignment_bytes(irtype, type->base.alignment);
 304
 305         return irtype;
 306 }
 307
 308 /**
 309  * Creates a Firm type for a complex type
 310  */
 311 static ir_type *create_complex_type(const complex_type_t *type)
 312 {
 313         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 314         atomic_type_kind_t  kind      = type->akind;
 315         ir_mode            *mode      = _atomic_modes[kind];
 316         ident              *id        = get_mode_ident(mode);
 317
 318         (void) id;
 319         (void) dbgi;
 320
 321         /* FIXME: finish the array */
 322         return NULL;
 323 }
 324
 325 /**
 326  * Creates a Firm type for an imaginary type
 327  */
 328 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 329 {
 330         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 331         atomic_type_kind_t  kind      = type->akind;
 332         ir_mode            *mode      = _atomic_modes[kind];
 333         ident              *id        = get_mode_ident(mode);
 334         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 335
 336         set_type_alignment_bytes(irtype, type->base.alignment);
 337
 338         return irtype;
 339 }
 340
 341 /**
 342  * return type of a parameter (and take transparent union gnu extension into
 343  * account)
 344  */
 345 static type_t *get_parameter_type(type_t *type)
 346 {
 347         type = skip_typeref(type);
 348         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 349                 declaration_t *decl = type->compound.declaration;
 350                 type                = decl->scope.declarations->type;
 351         }
 352
 353         return type;
 354 }
 355
 356 static ir_type *create_method_type(const function_type_t *function_type)
 357 {
 358         type_t  *return_type  = function_type->return_type;
 359
 360         ident   *id           = id_unique("functiontype.%u");
 361         int      n_parameters = count_parameters(function_type);
 362         int      n_results    = return_type == type_void ? 0 : 1;
 363         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 364         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 365
 366         if (return_type != type_void) {
 367                 ir_type *restype = get_ir_type(return_type);
 368                 set_method_res_type(irtype, 0, restype);
 369         }
 370
 371         function_parameter_t *parameter = function_type->parameters;
 372         int                   n         = 0;
 373         for ( ; parameter != NULL; parameter = parameter->next) {
 374                 type_t  *type     = get_parameter_type(parameter->type);
 375                 ir_type *p_irtype = get_ir_type(type);
 376                 set_method_param_type(irtype, n, p_irtype);
 377                 ++n;
 378         }
 379
 380         if (function_type->variadic || function_type->unspecified_parameters) {
 381                 set_method_variadicity(irtype, variadicity_variadic);
 382         }
 383
 384         unsigned cc = get_method_calling_convention(irtype);
 385         switch (function_type->calling_convention) {
 386         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 387         case CC_CDECL:
 388 is_cdecl:
 389                 set_method_calling_convention(irtype, SET_CDECL(cc));
 390                 break;
 391
 392         case CC_STDCALL:
 393                 if (function_type->variadic || function_type->unspecified_parameters)
 394                         goto is_cdecl;
 395
 396                 /* only non-variadic function can use stdcall, else use cdecl */
 397                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 398                 break;
 399
 400         case CC_FASTCALL:
 401                 if (function_type->variadic || function_type->unspecified_parameters)
 402                         goto is_cdecl;
 403                 /* only non-variadic function can use fastcall, else use cdecl */
 404                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 405                 break;
 406
 407         case CC_THISCALL:
 408                 /* Hmm, leave default, not accepted by the parser yet. */
 409                 warningf(&function_type->base.source_position, "THISCALL calling convention not supported yet");
 410                 break;
 411         }
 412         return irtype;
 413 }
 414
 415 static ir_type *create_pointer_type(pointer_type_t *type)
 416 {
 417         type_t   *points_to    = type->points_to;
 418         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 419         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 420         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 421                                                     ir_points_to, mode_P_data, dbgi);
 422
 423         return ir_type;
 424 }
 425
 426 static ir_type *create_array_type(array_type_t *type)
 427 {
 428         type_t  *element_type    = type->element_type;
 429         ir_type *ir_element_type = get_ir_type(element_type);
 430
 431         ident    *id      = id_unique("array.%u");
 432         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 433         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 434
 435         const int align = get_type_alignment_bytes(ir_element_type);
 436         set_type_alignment_bytes(ir_type, align);
 437
 438         if (type->size_constant) {
 439                 int n_elements = type->size;
 440
 441                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 442
 443                 size_t elemsize = get_type_size_bytes(ir_element_type);
 444                 if (elemsize % align > 0) {
 445                         elemsize += align - (elemsize % align);
 446                 }
 447                 set_type_size_bytes(ir_type, n_elements * elemsize);
 448         } else {
 449                 set_array_lower_bound_int(ir_type, 0, 0);
 450         }
 451         set_type_state(ir_type, layout_fixed);
 452
 453         return ir_type;
 454 }
 455
 456 /**
 457  * Return the signed integer type of size bits.
 458  *
 459  * @param size   the size
 460  */
 461 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 462                                                  unsigned size)
 463 {
 464         static ir_mode *s_modes[64 + 1] = {NULL, };
 465         ir_type *res;
 466         ir_mode *mode;
 467
 468         if (size <= 0 || size > 64)
 469                 return NULL;
 470
 471         mode = s_modes[size];
 472         if (mode == NULL) {
 473                 char name[32];
 474
 475                 snprintf(name, sizeof(name), "bf_I%u", size);
 476                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 477                                    size <= 32 ? 32 : size );
 478                 s_modes[size] = mode;
 479         }
 480
 481         char name[32];
 482         snprintf(name, sizeof(name), "I%u", size);
 483         ident *id = new_id_from_str(name);
 484         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 485         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 486         set_primitive_base_type(res, base_tp);
 487
 488         return res;
 489 }
 490
 491 /**
 492  * Return the unsigned integer type of size bits.
 493  *
 494  * @param size   the size
 495  */
 496 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 497                                                    unsigned size)
 498 {
 499         static ir_mode *u_modes[64 + 1] = {NULL, };
 500         ir_type *res;
 501         ir_mode *mode;
 502
 503         if (size <= 0 || size > 64)
 504                 return NULL;
 505
 506         mode = u_modes[size];
 507         if (mode == NULL) {
 508                 char name[32];
 509
 510                 snprintf(name, sizeof(name), "bf_U%u", size);
 511                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 512                                    size <= 32 ? 32 : size );
 513                 u_modes[size] = mode;
 514         }
 515
 516         char name[32];
 517
 518         snprintf(name, sizeof(name), "U%u", size);
 519         ident *id = new_id_from_str(name);
 520         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 521         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 522         set_primitive_base_type(res, base_tp);
 523
 524         return res;
 525 }
 526
 527 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 528 {
 529         type_t *base = skip_typeref(type->base_type);
 530         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 531         ir_type *irbase = get_ir_type(base);
 532
 533         unsigned size = fold_constant(type->size);
 534
 535         assert(!is_type_float(base));
 536         if (is_type_signed(base)) {
 537                 return get_signed_int_type_for_bit_size(irbase, size);
 538         } else {
 539                 return get_unsigned_int_type_for_bit_size(irbase, size);
 540         }
 541 }
 542
 543 #define INVALID_TYPE ((ir_type_ptr)-1)
 544
 545 enum {
 546         COMPOUND_IS_STRUCT = false,
 547         COMPOUND_IS_UNION  = true
 548 };
 549
 550 /**
 551  * Construct firm type from ast struct type.
 552  *
 553  * As anonymous inner structs get flattened to a single firm type, we might get
 554  * irtype, outer_offset and out_align passed (they represent the position of
 555  * the anonymous inner struct inside the resulting firm struct)
 556  */
 557 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 558                                      size_t *outer_offset, size_t *outer_align,
 559                                      bool incomplete, bool is_union)
 560 {
 561         declaration_t      *declaration = type->declaration;
 562         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 563
 564         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 565                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 566                                 && incomplete))
 567                 return declaration->v.irtype;
 568
 569         size_t align_all  = 1;
 570         size_t offset     = 0;
 571         size_t bit_offset = 0;
 572         size_t size       = 0;
 573
 574         if (irtype == NULL) {
 575                 symbol_t *symbol = declaration->symbol;
 576                 ident    *id;
 577                 if (symbol != NULL) {
 578                         id = new_id_from_str(symbol->string);
 579                 } else {
 580                         if (is_union) {
 581                                 id = id_unique("__anonymous_union.%u");
 582                         } else {
 583                                 id = id_unique("__anonymous_struct.%u");
 584                         }
 585                 }
 586                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 587
 588                 if (is_union) {
 589                         irtype = new_d_type_union(id, dbgi);
 590                 } else {
 591                         irtype = new_d_type_struct(id, dbgi);
 592                 }
 593
 594                 declaration->declaration_kind
 595                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 596                 declaration->v.irtype         = irtype;
 597                 //type->base.firm_type          = irtype;
 598         } else {
 599                 offset    = *outer_offset;
 600                 align_all = *outer_align;
 601         }
 602
 603         if (incomplete)
 604                 return irtype;
 605
 606         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 607
 608         declaration_t *entry = declaration->scope.declarations;
 609         for( ; entry != NULL; entry = entry->next) {
 610                 if (entry->namespc != NAMESPACE_NORMAL)
 611                         continue;
 612
 613                 size_t prev_offset = offset;
 614
 615                 symbol_t *symbol     = entry->symbol;
 616                 type_t   *entry_type = skip_typeref(entry->type);
 617                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 618
 619                 ident    *ident;
 620                 if (symbol != NULL) {
 621                         ident = new_id_from_str(symbol->string);
 622                 } else {
 623                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 624                                 create_compound_type(&entry_type->compound, irtype, &offset,
 625                                                      &align_all, false, COMPOUND_IS_STRUCT);
 626                                 goto finished_member;
 627                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 628                                 create_compound_type(&entry_type->compound, irtype, &offset,
 629                                                      &align_all, false, COMPOUND_IS_UNION);
 630                                 goto finished_member;
 631                         } else {
 632                                 assert(entry_type->kind == TYPE_BITFIELD);
 633                         }
 634                         ident = id_unique("anon.%u");
 635                 }
 636
 637                 ir_type *base_irtype;
 638                 if (entry_type->kind == TYPE_BITFIELD) {
 639                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 640                 } else {
 641                         base_irtype = get_ir_type(entry_type);
 642                 }
 643
 644                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 645                 size_t misalign        = offset % entry_alignment;
 646
 647                 ir_type   *entry_irtype = get_ir_type(entry_type);
 648                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 649
 650                 size_t base;
 651                 size_t bits_remainder;
 652                 if (entry_type->kind == TYPE_BITFIELD) {
 653                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 654                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 655
 656                         if (size_bits > rest_size_bits) {
 657                                 /* start a new bucket */
 658                                 offset     += entry_alignment - misalign;
 659                                 bit_offset  = 0;
 660
 661                                 base           = offset;
 662                                 bits_remainder = 0;
 663                         } else {
 664                                 /* put into current bucket */
 665                                 base           = offset - misalign;
 666                                 bits_remainder = misalign * 8 + bit_offset;
 667                         }
 668
 669                         offset     += size_bits / 8;
 670                         bit_offset  = bit_offset + (size_bits % 8);
 671                 } else {
 672                         size_t entry_size = get_type_size_bytes(base_irtype);
 673                         if (misalign > 0 || bit_offset > 0)
 674                                 offset += entry_alignment - misalign;
 675
 676                         base           = offset;
 677                         bits_remainder = 0;
 678                         offset        += entry_size;
 679                         bit_offset     = 0;
 680                 }
 681
 682                 if (entry_alignment > align_all) {
 683                         if (entry_alignment % align_all != 0) {
 684                                 panic("uneven alignments not supported yet");
 685                         }
 686                         align_all = entry_alignment;
 687                 }
 688
 689                 set_entity_offset(entity, base);
 690                 set_entity_offset_bits_remainder(entity,
 691                                                  (unsigned char) bits_remainder);
 692                 //add_struct_member(irtype, entity);
 693                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 694                 assert(entry->v.entity == NULL);
 695                 entry->v.entity         = entity;
 696
 697 finished_member:
 698                 if (is_union) {
 699                         size_t entry_size = offset - prev_offset;
 700                         if (entry_size > size) {
 701                                 size = entry_size;
 702                         }
 703                         offset     = 0;
 704                         bit_offset = 0;
 705                 }
 706         }
 707
 708         if (!is_union) {
 709                 size = offset;
 710         }
 711
 712         size_t misalign = offset % align_all;
 713         if (misalign > 0 || bit_offset > 0) {
 714                 size += align_all - misalign;
 715         }
 716
 717         if (outer_offset != NULL) {
 718                 if (!is_union) {
 719                         *outer_offset = offset;
 720                 } else {
 721                         *outer_offset += size;
 722                 }
 723
 724                 if (align_all > *outer_align) {
 725                         if (align_all % *outer_align != 0) {
 726                                 panic("uneven alignments not supported yet");
 727                         }
 728                         *outer_align = align_all;
 729                 }
 730         } else {
 731                 set_type_alignment_bytes(irtype, align_all);
 732                 set_type_size_bytes(irtype, size);
 733                 set_type_state(irtype, layout_fixed);
 734         }
 735
 736         return irtype;
 737 }
 738
 739 static ir_type *create_enum_type(enum_type_t *const type)
 740 {
 741         type->base.firm_type = ir_type_int;
 742
 743         ir_mode *const mode    = mode_int;
 744         tarval  *const one     = get_mode_one(mode);
 745         tarval  *      tv_next = get_tarval_null(mode);
 746
 747         bool constant_folding_old = constant_folding;
 748         constant_folding = true;
 749
 750         declaration_t *declaration = type->declaration->next;
 751         for (; declaration != NULL; declaration = declaration->next) {
 752                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 753                         break;
 754
 755                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 756
 757                 expression_t *const init = declaration->init.enum_value;
 758                 if (init != NULL) {
 759                         ir_node *const cnst = expression_to_firm(init);
 760                         if (!is_Const(cnst)) {
 761                                 panic("couldn't fold constant");
 762                         }
 763                         tv_next = get_Const_tarval(cnst);
 764                 }
 765                 declaration->v.enum_val = tv_next;
 766                 tv_next = tarval_add(tv_next, one);
 767         }
 768
 769         constant_folding = constant_folding_old;
 770
 771         return ir_type_int;
 772 }
 773
 774 static ir_type *get_ir_type_incomplete(type_t *type)
 775 {
 776         assert(type != NULL);
 777         type = skip_typeref(type);
 778
 779         if (type->base.firm_type != NULL) {
 780                 assert(type->base.firm_type != INVALID_TYPE);
 781                 return type->base.firm_type;
 782         }
 783
 784         switch (type->kind) {
 785         case TYPE_COMPOUND_STRUCT:
 786                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 787                                             true, COMPOUND_IS_STRUCT);
 788         case TYPE_COMPOUND_UNION:
 789                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 790                                             true, COMPOUND_IS_UNION);
 791         default:
 792                 return get_ir_type(type);
 793         }
 794 }
 795
 796 static ir_type *get_ir_type(type_t *type)
 797 {
 798         assert(type != NULL);
 799
 800         type = skip_typeref(type);
 801
 802         if (type->base.firm_type != NULL) {
 803                 assert(type->base.firm_type != INVALID_TYPE);
 804                 return type->base.firm_type;
 805         }
 806
 807         ir_type *firm_type = NULL;
 808         switch (type->kind) {
 809         case TYPE_ERROR:
 810                 panic("error type occurred");
 811         case TYPE_ATOMIC:
 812                 firm_type = create_atomic_type(&type->atomic);
 813                 break;
 814         case TYPE_COMPLEX:
 815                 firm_type = create_complex_type(&type->complex);
 816                 break;
 817         case TYPE_IMAGINARY:
 818                 firm_type = create_imaginary_type(&type->imaginary);
 819                 break;
 820         case TYPE_FUNCTION:
 821                 firm_type = create_method_type(&type->function);
 822                 break;
 823         case TYPE_POINTER:
 824                 firm_type = create_pointer_type(&type->pointer);
 825                 break;
 826         case TYPE_ARRAY:
 827                 firm_type = create_array_type(&type->array);
 828                 break;
 829         case TYPE_COMPOUND_STRUCT:
 830                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 831                                                  false, COMPOUND_IS_STRUCT);
 832                 break;
 833         case TYPE_COMPOUND_UNION:
 834                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 835                                                  false, COMPOUND_IS_UNION);
 836                 break;
 837         case TYPE_ENUM:
 838                 firm_type = create_enum_type(&type->enumt);
 839                 break;
 840         case TYPE_BUILTIN:
 841                 firm_type = get_ir_type(type->builtin.real_type);
 842                 break;
 843         case TYPE_BITFIELD:
 844                 firm_type = create_bitfield_type(&type->bitfield);
 845                 break;
 846
 847         case TYPE_TYPEOF:
 848         case TYPE_TYPEDEF:
 849         case TYPE_INVALID:
 850                 break;
 851         }
 852         if (firm_type == NULL)
 853                 panic("unknown type found");
 854
 855         type->base.firm_type = firm_type;
 856         return firm_type;
 857 }
 858
 859 static inline ir_mode *get_ir_mode(type_t *type)
 860 {
 861         ir_type *irtype = get_ir_type(type);
 862
 863         /* firm doesn't report a mode for arrays somehow... */
 864         if (is_Array_type(irtype)) {
 865                 return mode_P_data;
 866         }
 867
 868         ir_mode *mode = get_type_mode(irtype);
 869         assert(mode != NULL);
 870         return mode;
 871 }
 872
 873 /** Names of the runtime functions. */
 874 static const struct {
 875         int        id;           /**< the rts id */
 876         int        n_res;        /**< number of return values */
 877         const char *name;        /**< the name of the rts function */
 878         int        n_params;     /**< number of parameters */
 879         unsigned   flags;        /**< language flags */
 880 } rts_data[] = {
 881         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 882         { rts_abort,      0, "abort",        0, _C89 },
 883         { rts_alloca,     1, "alloca",       1, _ALL },
 884         { rts_abs,        1, "abs",          1, _C89 },
 885         { rts_labs,       1, "labs",         1, _C89 },
 886         { rts_llabs,      1, "llabs",        1, _C99 },
 887         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 888
 889         { rts_fabs,       1, "fabs",         1, _C89 },
 890         { rts_sqrt,       1, "sqrt",         1, _C89 },
 891         { rts_cbrt,       1, "cbrt",         1, _C99 },
 892         { rts_exp,        1, "exp",          1, _C89 },
 893         { rts_exp2,       1, "exp2",         1, _C89 },
 894         { rts_exp10,      1, "exp10",        1, _GNUC },
 895         { rts_log,        1, "log",          1, _C89 },
 896         { rts_log2,       1, "log2",         1, _C89 },
 897         { rts_log10,      1, "log10",        1, _C89 },
 898         { rts_pow,        1, "pow",          2, _C89 },
 899         { rts_sin,        1, "sin",          1, _C89 },
 900         { rts_cos,        1, "cos",          1, _C89 },
 901         { rts_tan,        1, "tan",          1, _C89 },
 902         { rts_asin,       1, "asin",         1, _C89 },
 903         { rts_acos,       1, "acos",         1, _C89 },
 904         { rts_atan,       1, "atan",         1, _C89 },
 905         { rts_sinh,       1, "sinh",         1, _C89 },
 906         { rts_cosh,       1, "cosh",         1, _C89 },
 907         { rts_tanh,       1, "tanh",         1, _C89 },
 908
 909         { rts_fabsf,      1, "fabsf",        1, _C99 },
 910         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 911         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 912         { rts_expf,       1, "expf",         1, _C99 },
 913         { rts_exp2f,      1, "exp2f",        1, _C99 },
 914         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 915         { rts_logf,       1, "logf",         1, _C99 },
 916         { rts_log2f,      1, "log2f",        1, _C99 },
 917         { rts_log10f,     1, "log10f",       1, _C99 },
 918         { rts_powf,       1, "powf",         2, _C99 },
 919         { rts_sinf,       1, "sinf",         1, _C99 },
 920         { rts_cosf,       1, "cosf",         1, _C99 },
 921         { rts_tanf,       1, "tanf",         1, _C99 },
 922         { rts_asinf,      1, "asinf",        1, _C99 },
 923         { rts_acosf,      1, "acosf",        1, _C99 },
 924         { rts_atanf,      1, "atanf",        1, _C99 },
 925         { rts_sinhf,      1, "sinhf",        1, _C99 },
 926         { rts_coshf,      1, "coshf",        1, _C99 },
 927         { rts_tanhf,      1, "tanhf",        1, _C99 },
 928
 929         { rts_fabsl,      1, "fabsl",        1, _C99 },
 930         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 931         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 932         { rts_expl,       1, "expl",         1, _C99 },
 933         { rts_exp2l,      1, "exp2l",        1, _C99 },
 934         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 935         { rts_logl,       1, "logl",         1, _C99 },
 936         { rts_log2l,      1, "log2l",        1, _C99 },
 937         { rts_log10l,     1, "log10l",       1, _C99 },
 938         { rts_powl,       1, "powl",         2, _C99 },
 939         { rts_sinl,       1, "sinl",         1, _C99 },
 940         { rts_cosl,       1, "cosl",         1, _C99 },
 941         { rts_tanl,       1, "tanl",         1, _C99 },
 942         { rts_asinl,      1, "asinl",        1, _C99 },
 943         { rts_acosl,      1, "acosl",        1, _C99 },
 944         { rts_atanl,      1, "atanl",        1, _C99 },
 945         { rts_sinhl,      1, "sinhl",        1, _C99 },
 946         { rts_coshl,      1, "coshl",        1, _C99 },
 947         { rts_tanhl,      1, "tanhl",        1, _C99 },
 948
 949         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 950         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 951         { rts_strcmp,     1, "strcmp",       2, _C89 },
 952         { rts_strncmp,    1, "strncmp",      3, _C89 }
 953 };
 954
 955 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 956
 957 /**
 958  * Mangles an entity linker (ld) name for win32 usage.
 959  *
 960  * @param ent          the entity to be mangled
 961  * @param declaration  the declaration
 962  */
 963 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 964 {
 965         ident *id;
 966
 967         if (is_Method_type(get_entity_type(ent)))
 968                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 969         else {
 970                 /* always add an underscore in win32 */
 971                 id = mangle(id_underscore, get_entity_ident(ent));
 972         }
 973
 974         decl_modifiers_t decl_modifiers = declaration->modifiers;
 975         if (decl_modifiers & DM_DLLIMPORT) {
 976                 /* add prefix for imported symbols */
 977                 id = mangle(id_imp, id);
 978         }
 979         return id;
 980 }
 981
 982 /**
 983  * Mangles an entity linker (ld) name for Linux ELF usage.
 984  *
 985  * @param ent          the entity to be mangled
 986  * @param declaration  the declaration
 987  */
 988 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 989                                         declaration_t *declaration)
 990 {
 991         (void) declaration;
 992         return get_entity_ident(entity);
 993 }
 994
 995 /**
 996  * Mangles an entity linker (ld) name for Mach-O usage.
 997  *
 998  * @param ent          the entity to be mangled
 999  * @param declaration  the declaration
1000  */
1001 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
1002 {
1003         (void) declaration;
1004         ident *id = mangle(id_underscore, get_entity_ident(ent));
1005         return id;
1006 }
1007
1008 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
1009                                        declaration_t *declaration);
1010 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
1011
1012 /**
1013  * Handle GNU attributes for entities
1014  *
1015  * @param ent   the entity
1016  * @param decl  the routine declaration
1017  */
1018 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
1019 {
1020         if (decl->modifiers & DM_PURE) {
1021                 /* TRUE if the declaration includes the GNU
1022                    __attribute__((pure)) specifier. */
1023                 set_entity_additional_property(ent, mtp_property_pure);
1024         }
1025         if (decl->modifiers & DM_USED) {
1026                 /* TRUE if the declaration includes the GNU
1027                    __attribute__((used)) specifier. */
1028                 set_entity_stickyness(ent, stickyness_sticky);
1029         }
1030 }
1031
1032 /**
1033  * Creates an entity representing a function.
1034  *
1035  * @param declaration  the function declaration
1036  */
1037 static ir_entity *get_function_entity(declaration_t *declaration)
1038 {
1039         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
1040                 return declaration->v.entity;
1041         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1042
1043         symbol_t *symbol = declaration->symbol;
1044         ident    *id     = new_id_from_str(symbol->string);
1045
1046         ir_type  *global_type    = get_glob_type();
1047         ir_type  *ir_type_method = get_ir_type(declaration->type);
1048         assert(is_Method_type(ir_type_method));
1049
1050         /* already an entity defined? */
1051         ir_entity *entity = entitymap_get(&entitymap, symbol);
1052         if (entity != NULL) {
1053                 if (get_entity_visibility(entity) == visibility_external_allocated
1054                                 && declaration->init.statement != NULL) {
1055                         set_entity_visibility(entity, visibility_external_visible);
1056                 }
1057                 goto entity_created;
1058         }
1059
1060         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1061         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1062         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1063
1064         handle_gnu_attributes_ent(entity, declaration);
1065
1066         /* static inline             => local
1067          * extern inline             => local
1068          * inline without definition => local
1069          * inline with definition    => external_visible */
1070         storage_class_tag_t const storage_class = (storage_class_tag_t)declaration->storage_class;
1071         bool                const is_inline     = declaration->is_inline;
1072         bool                const has_body      = declaration->init.statement != NULL;
1073         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1074                 set_entity_visibility(entity, visibility_external_visible);
1075         } else if (storage_class == STORAGE_CLASS_STATIC ||
1076                    (is_inline && has_body)) {
1077                 if (!has_body) {
1078                         /* this entity was declared, but is defined nowhere */
1079                         set_entity_peculiarity(entity, peculiarity_description);
1080                 }
1081                 set_entity_visibility(entity, visibility_local);
1082         } else if (has_body) {
1083                 set_entity_visibility(entity, visibility_external_visible);
1084         } else {
1085                 set_entity_visibility(entity, visibility_external_allocated);
1086         }
1087         set_entity_allocation(entity, allocation_static);
1088
1089         /* We should check for file scope here, but as long as we compile C only
1090            this is not needed. */
1091         if (! firm_opt.freestanding) {
1092                 /* check for a known runtime function */
1093                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1094                         if (id != rts_idents[i])
1095                                 continue;
1096
1097                         /* ignore those rts functions not necessary needed for current mode */
1098                         if ((c_mode & rts_data[i].flags) == 0)
1099                                 continue;
1100                         assert(rts_entities[rts_data[i].id] == NULL);
1101                         rts_entities[rts_data[i].id] = entity;
1102                 }
1103         }
1104
1105         entitymap_insert(&entitymap, symbol, entity);
1106
1107 entity_created:
1108         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1109         declaration->v.entity         = entity;
1110
1111         return entity;
1112 }
1113
1114 /**
1115  * Creates a Const node representing a constant.
1116  */
1117 static ir_node *const_to_firm(const const_expression_t *cnst)
1118 {
1119         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1120         ir_mode  *mode = get_ir_mode(cnst->base.type);
1121
1122         char    buf[128];
1123         tarval *tv;
1124         size_t  len;
1125         if (mode_is_float(mode)) {
1126                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1127         } else {
1128                 if (mode_is_signed(mode)) {
1129                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1130                 } else {
1131                         len = snprintf(buf, sizeof(buf), "%llu",
1132                                        (unsigned long long) cnst->v.int_value);
1133                 }
1134                 tv = new_tarval_from_str(buf, len, mode);
1135         }
1136
1137         return new_d_Const(dbgi, mode, tv);
1138 }
1139
1140 /**
1141  * Creates a Const node representing a character constant.
1142  */
1143 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1144 {
1145         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1146         ir_mode  *mode = get_ir_mode(cnst->base.type);
1147
1148         long long int v = 0;
1149         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1150                 if (char_is_signed) {
1151                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1152                 } else {
1153                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1154                 }
1155         }
1156         char    buf[128];
1157         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1158         tarval *tv = new_tarval_from_str(buf, len, mode);
1159
1160         return new_d_Const(dbgi, mode, tv);
1161 }
1162
1163 /**
1164  * Creates a Const node representing a wide character constant.
1165  */
1166 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1167 {
1168         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1169         ir_mode  *mode = get_ir_mode(cnst->base.type);
1170
1171         long long int v = cnst->v.wide_character.begin[0];
1172
1173         char    buf[128];
1174         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1175         tarval *tv = new_tarval_from_str(buf, len, mode);
1176
1177         return new_d_Const(dbgi, mode, tv);
1178 }
1179
1180 /**
1181  * Creates a SymConst for a given entity.
1182  *
1183  * @param dbgi    debug info
1184  * @param mode    the (reference) mode for the SymConst
1185  * @param entity  the entity
1186  */
1187 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1188                               ir_entity *entity)
1189 {
1190         assert(entity != NULL);
1191         union symconst_symbol sym;
1192         sym.entity_p = entity;
1193         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1194 }
1195
1196 /**
1197  * Creates a SymConst node representing a string constant.
1198  *
1199  * @param src_pos    the source position of the string constant
1200  * @param id_prefix  a prefix for the name of the generated string constant
1201  * @param value      the value of the string constant
1202  */
1203 static ir_node *string_to_firm(const source_position_t *const src_pos,
1204                                const char *const id_prefix,
1205                                const string_t *const value)
1206 {
1207         ir_type  *const global_type = get_glob_type();
1208         dbg_info *const dbgi        = get_dbg_info(src_pos);
1209         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1210                                                        ir_type_const_char, dbgi);
1211
1212         ident     *const id     = id_unique(id_prefix);
1213         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1214         set_entity_ld_ident(entity, id);
1215         set_entity_variability(entity, variability_constant);
1216         set_entity_allocation(entity, allocation_static);
1217
1218         ir_type *const elem_type = ir_type_const_char;
1219         ir_mode *const mode      = get_type_mode(elem_type);
1220
1221         const char* const string = value->begin;
1222         const size_t      slen   = value->size;
1223
1224         set_array_lower_bound_int(type, 0, 0);
1225         set_array_upper_bound_int(type, 0, slen);
1226         set_type_size_bytes(type, slen);
1227         set_type_state(type, layout_fixed);
1228
1229         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1230         for(size_t i = 0; i < slen; ++i) {
1231                 tvs[i] = new_tarval_from_long(string[i], mode);
1232         }
1233
1234         set_array_entity_values(entity, tvs, slen);
1235         free(tvs);
1236
1237         return create_symconst(dbgi, mode_P_data, entity);
1238 }
1239
1240 /**
1241  * Creates a SymConst node representing a string literal.
1242  *
1243  * @param literal   the string literal
1244  */
1245 static ir_node *string_literal_to_firm(
1246                 const string_literal_expression_t* literal)
1247 {
1248         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1249                               &literal->value);
1250 }
1251
1252 /**
1253  * Creates a SymConst node representing a wide string literal.
1254  *
1255  * @param literal   the wide string literal
1256  */
1257 static ir_node *wide_string_literal_to_firm(
1258         const wide_string_literal_expression_t* const literal)
1259 {
1260         ir_type *const global_type = get_glob_type();
1261         ir_type *const elem_type   = ir_type_wchar_t;
1262         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1263         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1264                                                     elem_type, dbgi);
1265
1266         ident     *const id     = id_unique("Lstr.%u");
1267         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1268         set_entity_ld_ident(entity, id);
1269         set_entity_variability(entity, variability_constant);
1270         set_entity_allocation(entity, allocation_static);
1271
1272         ir_mode *const mode      = get_type_mode(elem_type);
1273
1274         const wchar_rep_t *const string = literal->value.begin;
1275         const size_t             slen   = literal->value.size;
1276
1277         set_array_lower_bound_int(type, 0, 0);
1278         set_array_upper_bound_int(type, 0, slen);
1279         set_type_size_bytes(type, slen);
1280         set_type_state(type, layout_fixed);
1281
1282         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1283         for(size_t i = 0; i < slen; ++i) {
1284                 tvs[i] = new_tarval_from_long(string[i], mode);
1285         }
1286
1287         set_array_entity_values(entity, tvs, slen);
1288         free(tvs);
1289
1290         return create_symconst(dbgi, mode_P_data, entity);
1291 }
1292
1293 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1294                                       ir_node *const addr)
1295 {
1296         ir_type *irtype = get_ir_type(type);
1297         if (is_compound_type(irtype)
1298                         || is_Method_type(irtype)
1299                         || is_Array_type(irtype)) {
1300                 return addr;
1301         }
1302
1303         ir_mode *const mode     = get_type_mode(irtype);
1304         ir_node *const memory   = get_store();
1305         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1306         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1307         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1308
1309         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1310                 set_Load_volatility(load, volatility_is_volatile);
1311         }
1312
1313         set_store(load_mem);
1314         return load_res;
1315 }
1316
1317 /**
1318  * Creates a strict Conv if neccessary.
1319  */
1320 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1321 {
1322         ir_mode *mode = get_irn_mode(node);
1323
1324         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1325                 return node;
1326         if (!mode_is_float(mode))
1327                 return node;
1328
1329         /* check if there is already a Conv */
1330         if (is_Conv(node)) {
1331                 /* convert it into a strict Conv */
1332                 set_Conv_strict(node, 1);
1333                 return node;
1334         }
1335
1336         /* otherwise create a new one */
1337         return new_d_strictConv(dbgi, node, mode);
1338 }
1339
1340 static ir_node *get_global_var_address(dbg_info *const dbgi,
1341                                        const declaration_t *const decl)
1342 {
1343         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1344
1345         ir_entity *const entity = decl->v.entity;
1346         switch ((storage_class_tag_t)decl->storage_class) {
1347                 case STORAGE_CLASS_THREAD:
1348                 case STORAGE_CLASS_THREAD_EXTERN:
1349                 case STORAGE_CLASS_THREAD_STATIC: {
1350                         ir_node *const no_mem = new_NoMem();
1351                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1352                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1353                 }
1354
1355                 default:
1356                         return create_symconst(dbgi, mode_P_data, entity);
1357         }
1358 }
1359
1360 /**
1361  * Returns the correct base address depending on whether it is a parameter or a
1362  * normal local variable.
1363  */
1364 static ir_node *get_local_frame(ir_entity *const ent)
1365 {
1366         ir_graph      *const irg   = current_ir_graph;
1367         const ir_type *const owner = get_entity_owner(ent);
1368         if (owner == get_irg_frame_type(irg)) {
1369                 return get_irg_frame(irg);
1370         } else {
1371                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1372                 return get_irg_value_param_base(irg);
1373         }
1374 }
1375
1376 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1377 {
1378         ir_mode *value_mode = get_irn_mode(value);
1379
1380         if (value_mode == dest_mode || is_Bad(value))
1381                 return value;
1382
1383         if (dest_mode == mode_b) {
1384                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1385                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1386                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1387                 return proj;
1388         }
1389
1390         return new_d_Conv(dbgi, value, dest_mode);
1391 }
1392
1393 /**
1394  * Keep all memory edges of the given block.
1395  */
1396 static void keep_all_memory(ir_node *block) {
1397         ir_node *old = get_cur_block();
1398
1399         set_cur_block(block);
1400         keep_alive(get_store());
1401         /* TODO: keep all memory edges from restricted pointers */
1402         set_cur_block(old);
1403 }
1404
1405 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1406 {
1407         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1408         declaration_t *declaration = ref->declaration;
1409         type_t        *type        = skip_typeref(declaration->type);
1410
1411         /* make sure the type is constructed */
1412         (void) get_ir_type(type);
1413
1414         switch ((declaration_kind_t)declaration->declaration_kind) {
1415         case DECLARATION_KIND_TYPE:
1416         case DECLARATION_KIND_UNKNOWN:
1417                 break;
1418
1419         case DECLARATION_KIND_ENUM_ENTRY: {
1420                 ir_mode *const mode = get_ir_mode(type);
1421                 return new_Const(mode, declaration->v.enum_val);
1422         }
1423
1424         case DECLARATION_KIND_LOCAL_VARIABLE: {
1425                 ir_mode *const mode = get_ir_mode(type);
1426                 return get_value(declaration->v.value_number, mode);
1427         }
1428         case DECLARATION_KIND_FUNCTION: {
1429                 ir_mode *const mode = get_ir_mode(type);
1430                 return create_symconst(dbgi, mode, declaration->v.entity);
1431         }
1432         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1433                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1434                 return deref_address(dbgi, declaration->type, addr);
1435         }
1436
1437         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1438                 ir_entity *entity = declaration->v.entity;
1439                 ir_node   *frame  = get_local_frame(entity);
1440                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1441                 return deref_address(dbgi, declaration->type, sel);
1442         }
1443
1444         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1445                 return declaration->v.vla_base;
1446
1447         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1448         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1449         case DECLARATION_KIND_COMPOUND_MEMBER:
1450         case DECLARATION_KIND_LABEL_BLOCK:
1451                 panic("not implemented reference type");
1452         }
1453
1454         panic("reference to declaration with unknown type found");
1455 }
1456
1457 static ir_node *reference_addr(const reference_expression_t *ref)
1458 {
1459         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1460         declaration_t *declaration = ref->declaration;
1461
1462         switch((declaration_kind_t) declaration->declaration_kind) {
1463         case DECLARATION_KIND_TYPE:
1464         case DECLARATION_KIND_UNKNOWN:
1465                 break;
1466         case DECLARATION_KIND_LOCAL_VARIABLE:
1467                 /* you can store to a local variable (so we don't panic but return NULL
1468                  * as an indicator for no real address) */
1469                 return NULL;
1470         case DECLARATION_KIND_FUNCTION: {
1471                 type_t *const  type = skip_typeref(ref->base.type);
1472                 ir_mode *const mode = get_ir_mode(type);
1473                 return create_symconst(dbgi, mode, declaration->v.entity);
1474         }
1475         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1476                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1477                 return addr;
1478         }
1479         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1480                 ir_entity *entity = declaration->v.entity;
1481                 ir_node   *frame  = get_local_frame(entity);
1482                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1483
1484                 return sel;
1485         }
1486
1487         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1488                 return declaration->v.vla_base;
1489
1490         case DECLARATION_KIND_ENUM_ENTRY:
1491                 panic("trying to reference enum entry");
1492
1493         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1494         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1495         case DECLARATION_KIND_COMPOUND_MEMBER:
1496         case DECLARATION_KIND_LABEL_BLOCK:
1497                 panic("not implemented reference type");
1498         }
1499
1500         panic("reference to declaration with unknown type found");
1501 }
1502
1503 /**
1504  * Transform calls to builtin functions.
1505  */
1506 static ir_node *process_builtin_call(const call_expression_t *call)
1507 {
1508         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1509
1510         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1511         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1512
1513         type_t *type = skip_typeref(builtin->base.type);
1514         assert(is_type_pointer(type));
1515
1516         type_t   *function_type = skip_typeref(type->pointer.points_to);
1517         symbol_t *symbol        = builtin->symbol;
1518
1519         switch(symbol->ID) {
1520         case T___builtin_alloca: {
1521                 if (call->arguments == NULL || call->arguments->next != NULL) {
1522                         panic("invalid number of parameters on __builtin_alloca");
1523                 }
1524                 expression_t *argument = call->arguments->expression;
1525                 ir_node      *size     = expression_to_firm(argument);
1526
1527                 ir_node *store  = get_store();
1528                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1529                                               stack_alloc);
1530                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1531                 set_store(proj_m);
1532                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1533
1534                 return res;
1535         }
1536         case T___builtin_huge_val: {
1537                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1538                 tarval  *tv   = get_mode_infinite(mode);
1539                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1540                 return   res;
1541         }
1542         case T___builtin_nan:
1543         case T___builtin_nanf:
1544         case T___builtin_nand: {
1545                 /* Ignore string for now... */
1546                 assert(is_type_function(function_type));
1547                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1548                 tarval  *tv   = get_mode_NAN(mode);
1549                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1550                 return res;
1551         }
1552         case T___builtin_va_end:
1553                 return NULL;
1554         default:
1555                 panic("Unsupported builtin found\n");
1556         }
1557 }
1558
1559 /**
1560  * Transform a call expression.
1561  * Handles some special cases, like alloca() calls, which must be resolved
1562  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1563  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1564  * handled right...
1565  */
1566 static ir_node *call_expression_to_firm(const call_expression_t *call)
1567 {
1568         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1569         assert(get_cur_block() != NULL);
1570
1571         expression_t *function = call->function;
1572         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1573                 return process_builtin_call(call);
1574         }
1575         if (function->kind == EXPR_REFERENCE) {
1576                 const reference_expression_t *ref = &function->reference;
1577                 declaration_t *declaration = ref->declaration;
1578
1579                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1580                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1581                                 /* handle alloca() call */
1582                                 expression_t *argument = call->arguments->expression;
1583                                 ir_node      *size     = expression_to_firm(argument);
1584
1585                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1586
1587                                 ir_node  *store  = get_store();
1588                                 dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1589                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1590                                                                stack_alloc);
1591                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1592                                 set_store(proj_m);
1593                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1594
1595                                 return res;
1596                         }
1597                 }
1598         }
1599         ir_node *callee = expression_to_firm(function);
1600
1601         type_t *type = skip_typeref(function->base.type);
1602         assert(is_type_pointer(type));
1603         pointer_type_t *pointer_type = &type->pointer;
1604         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1605         assert(is_type_function(points_to));
1606         function_type_t *function_type = &points_to->function;
1607
1608         int      n_parameters = 0;
1609         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1610         ir_type *new_method_type = NULL;
1611         if (function_type->variadic || function_type->unspecified_parameters) {
1612                 const call_argument_t *argument = call->arguments;
1613                 for( ; argument != NULL; argument = argument->next) {
1614                         ++n_parameters;
1615                 }
1616
1617                 /* we need to construct a new method type matching the call
1618                  * arguments... */
1619                 int n_res       = get_method_n_ress(ir_method_type);
1620                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1621                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1622                                                     n_parameters, n_res, dbgi);
1623                 set_method_calling_convention(new_method_type,
1624                                get_method_calling_convention(ir_method_type));
1625                 set_method_additional_properties(new_method_type,
1626                                get_method_additional_properties(ir_method_type));
1627                 set_method_variadicity(new_method_type,
1628                                        get_method_variadicity(ir_method_type));
1629
1630                 for(int i = 0; i < n_res; ++i) {
1631                         set_method_res_type(new_method_type, i,
1632                                             get_method_res_type(ir_method_type, i));
1633                 }
1634                 argument = call->arguments;
1635                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1636                         expression_t *expression = argument->expression;
1637                         ir_type      *irtype     = get_ir_type(expression->base.type);
1638                         set_method_param_type(new_method_type, i, irtype);
1639                 }
1640                 ir_method_type = new_method_type;
1641         } else {
1642                 n_parameters = get_method_n_params(ir_method_type);
1643         }
1644
1645         ir_node *in[n_parameters];
1646
1647         const call_argument_t *argument = call->arguments;
1648         for(int n = 0; n < n_parameters; ++n) {
1649                 expression_t *expression = argument->expression;
1650                 ir_node      *arg_node   = expression_to_firm(expression);
1651
1652                 arg_node = do_strict_conv(dbgi, arg_node);
1653
1654                 in[n] = arg_node;
1655
1656                 argument = argument->next;
1657         }
1658
1659         ir_node  *store = get_store();
1660         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1661                                      ir_method_type);
1662         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1663         set_store(mem);
1664
1665         type_t  *return_type = skip_typeref(function_type->return_type);
1666         ir_node *result      = NULL;
1667
1668         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1669                 ir_mode *mode;
1670                 if (is_type_scalar(return_type)) {
1671                         mode = get_ir_mode(return_type);
1672                 } else {
1673                         mode = mode_P_data;
1674                 }
1675                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1676                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1677         }
1678
1679         if (function->kind == EXPR_REFERENCE &&
1680             function->reference.declaration->modifiers & DM_NORETURN) {
1681                 /* A dead end:  Keep the Call and the Block.  Also place all further
1682                  * nodes into a new and unreachable block. */
1683                 keep_alive(node);
1684                 keep_alive(get_cur_block());
1685                 new_Block(0, NULL);
1686         }
1687
1688         return result;
1689 }
1690
1691 static void statement_to_firm(statement_t *statement);
1692 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1693
1694 static ir_node *expression_to_addr(const expression_t *expression);
1695 static ir_node *create_condition_evaluation(const expression_t *expression,
1696                                             ir_node *true_block,
1697                                             ir_node *false_block);
1698
1699 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1700                          ir_node *value)
1701 {
1702         value = do_strict_conv(dbgi, value);
1703
1704         ir_node *memory = get_store();
1705
1706         if (is_type_scalar(type)) {
1707                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1708                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1709                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1710                         set_Store_volatility(store, volatility_is_volatile);
1711                 set_store(store_mem);
1712         } else {
1713                 ir_type *irtype    = get_ir_type(type);
1714                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1715                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1716                 set_store(copyb_mem);
1717         }
1718 }
1719
1720 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1721 {
1722         tarval *all_one   = get_mode_all_one(mode);
1723         int     mode_size = get_mode_size_bits(mode);
1724
1725         assert(offset >= 0);
1726         assert(size   >= 0);
1727         assert(offset + size <= mode_size);
1728         if (size == mode_size) {
1729                 return all_one;
1730         }
1731
1732         long    shiftr    = get_mode_size_bits(mode) - size;
1733         long    shiftl    = offset;
1734         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1735         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1736         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1737         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1738
1739         return mask1;
1740 }
1741
1742 static void bitfield_store_to_firm(const select_expression_t *expression,
1743                                    ir_node *addr, ir_node *value)
1744 {
1745         type_t       *type   = expression->base.type;
1746         ir_mode      *mode   = get_ir_mode(type);
1747
1748         assert(get_irn_mode(value) == mode || is_Bad(value));
1749
1750         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1751
1752         /* kill upper bits of value and shift to right position */
1753         ir_entity *entity       = expression->compound_entry->v.entity;
1754         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1755         ir_type   *entity_type  = get_entity_type(entity);
1756         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1757
1758         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1759         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1760         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1761         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1762         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1763         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1764
1765         /* load current value */
1766         ir_node  *mem             = get_store();
1767         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1768         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1769         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1770         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1771         tarval   *inv_mask        = tarval_not(shift_mask);
1772         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1773         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1774
1775         /* construct new value and store */
1776         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1777         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1778         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1779         set_store(store_mem);
1780
1781         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1782                 set_Load_volatility(load, volatility_is_volatile);
1783                 set_Store_volatility(store, volatility_is_volatile);
1784         }
1785 }
1786
1787 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1788                 ir_node *addr)
1789 {
1790         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1791         type_t   *type     = expression->base.type;
1792         ir_mode  *mode     = get_ir_mode(type);
1793         ir_node  *mem      = get_store();
1794         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1795         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1796         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1797
1798         load_res           = create_conv(dbgi, load_res, mode_int);
1799
1800         set_store(load_mem);
1801
1802         /* kill upper bits */
1803         ir_entity *entity       = expression->compound_entry->v.entity;
1804         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1805         ir_type   *entity_type  = get_entity_type(entity);
1806         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1807         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1808         assert(shift_bitsl >= 0);
1809         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1810         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1811         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1812
1813         long       shift_bitsr  = bitoffset + shift_bitsl;
1814         assert(shift_bitsr <= (long) machine_size);
1815         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1816         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1817         ir_node   *shiftr;
1818         if (mode_is_signed(mode)) {
1819                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1820         } else {
1821                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1822         }
1823
1824         return create_conv(dbgi, shiftr, mode);
1825 }
1826
1827 static void set_value_for_expression_addr(const expression_t *expression,
1828                                           ir_node *value, ir_node *addr)
1829 {
1830         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1831         value          = do_strict_conv(dbgi, value);
1832
1833         if (expression->kind == EXPR_REFERENCE) {
1834                 const reference_expression_t *ref = &expression->reference;
1835
1836                 declaration_t *declaration = ref->declaration;
1837                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1838                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1839                         set_value(declaration->v.value_number, value);
1840                         return;
1841                 }
1842         }
1843
1844         if (addr == NULL)
1845                 addr = expression_to_addr(expression);
1846
1847         type_t *type = skip_typeref(expression->base.type);
1848
1849         if (expression->kind == EXPR_SELECT) {
1850                 const select_expression_t *select = &expression->select;
1851
1852                 declaration_t *declaration = select->compound_entry;
1853                 if (declaration->type->kind == TYPE_BITFIELD) {
1854                         bitfield_store_to_firm(select, addr, value);
1855                         return;
1856                 }
1857         }
1858
1859         assign_value(dbgi, addr, type, value);
1860 }
1861
1862 static void set_value_for_expression(const expression_t *expression,
1863                                      ir_node *value)
1864 {
1865         set_value_for_expression_addr(expression, value, NULL);
1866 }
1867
1868 static ir_node *get_value_from_lvalue(const expression_t *expression,
1869                                       ir_node *addr)
1870 {
1871         if (expression->kind == EXPR_REFERENCE) {
1872                 const reference_expression_t *ref = &expression->reference;
1873
1874                 declaration_t *declaration = ref->declaration;
1875                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1876                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1877                         assert(addr == NULL);
1878                         ir_mode *mode = get_ir_mode(expression->base.type);
1879                         return get_value(declaration->v.value_number, mode);
1880                 }
1881         }
1882
1883         assert(addr != NULL);
1884         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1885
1886         ir_node *value;
1887         if (expression->kind == EXPR_SELECT &&
1888             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1889                 value = bitfield_extract_to_firm(&expression->select, addr);
1890         } else {
1891                 value = deref_address(dbgi, expression->base.type, addr);
1892         }
1893
1894         return value;
1895 }
1896
1897
1898 static ir_node *create_incdec(const unary_expression_t *expression)
1899 {
1900         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1901         const expression_t *value_expr = expression->value;
1902         ir_node            *addr       = expression_to_addr(value_expr);
1903         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1904
1905         type_t  *type = skip_typeref(expression->base.type);
1906         ir_mode *mode = get_ir_mode(expression->base.type);
1907
1908         ir_node *offset;
1909         if (is_type_pointer(type)) {
1910                 pointer_type_t *pointer_type = &type->pointer;
1911                 offset                       = get_type_size(pointer_type->points_to);
1912         } else {
1913                 assert(is_type_arithmetic(type));
1914                 offset = new_Const(mode, get_mode_one(mode));
1915         }
1916
1917         ir_node *result;
1918         ir_node *store_value;
1919         switch(expression->base.kind) {
1920         case EXPR_UNARY_POSTFIX_INCREMENT:
1921                 result      = value;
1922                 store_value = new_d_Add(dbgi, value, offset, mode);
1923                 break;
1924         case EXPR_UNARY_POSTFIX_DECREMENT:
1925                 result      = value;
1926                 store_value = new_d_Sub(dbgi, value, offset, mode);
1927                 break;
1928         case EXPR_UNARY_PREFIX_INCREMENT:
1929                 result      = new_d_Add(dbgi, value, offset, mode);
1930                 store_value = result;
1931                 break;
1932         case EXPR_UNARY_PREFIX_DECREMENT:
1933                 result      = new_d_Sub(dbgi, value, offset, mode);
1934                 store_value = result;
1935                 break;
1936         default:
1937                 panic("no incdec expr in create_incdec");
1938         }
1939
1940         set_value_for_expression_addr(value_expr, store_value, addr);
1941
1942         return result;
1943 }
1944
1945 static bool is_local_variable(expression_t *expression)
1946 {
1947         if (expression->kind != EXPR_REFERENCE)
1948                 return false;
1949         reference_expression_t *ref_expr    = &expression->reference;
1950         declaration_t          *declaration = ref_expr->declaration;
1951         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1952 }
1953
1954 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1955 {
1956         switch(kind) {
1957         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1958         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1959         case EXPR_BINARY_NOTEQUAL:
1960                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1961         case EXPR_BINARY_ISLESS:
1962         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1963         case EXPR_BINARY_ISLESSEQUAL:
1964         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1965         case EXPR_BINARY_ISGREATER:
1966         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1967         case EXPR_BINARY_ISGREATEREQUAL:
1968         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1969         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1970
1971         default:
1972                 break;
1973         }
1974         panic("trying to get pn_Cmp from non-comparison binexpr type");
1975 }
1976
1977 /**
1978  * Handle the assume optimizer hint: check if a Confirm
1979  * node can be created.
1980  *
1981  * @param dbi    debug info
1982  * @param expr   the IL assume expression
1983  *
1984  * we support here only some simple cases:
1985  *  - var rel const
1986  *  - const rel val
1987  *  - var rel var
1988  */
1989 static ir_node *handle_assume_compare(dbg_info *dbi,
1990                                       const binary_expression_t *expression)
1991 {
1992         expression_t  *op1 = expression->left;
1993         expression_t  *op2 = expression->right;
1994         declaration_t *var2, *var = NULL;
1995         ir_node       *res = NULL;
1996         pn_Cmp         cmp_val;
1997
1998         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1999
2000         if (is_local_variable(op1) && is_local_variable(op2)) {
2001         var  = op1->reference.declaration;
2002             var2 = op2->reference.declaration;
2003
2004                 type_t  *const type = skip_typeref(var->type);
2005                 ir_mode *const mode = get_ir_mode(type);
2006
2007                 ir_node *const irn1 = get_value(var->v.value_number, mode);
2008                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
2009
2010                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2011                 set_value(var2->v.value_number, res);
2012
2013                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2014                 set_value(var->v.value_number, res);
2015
2016                 return res;
2017         }
2018
2019         expression_t *con;
2020         if (is_local_variable(op1) && is_constant_expression(op2)) {
2021                 var = op1->reference.declaration;
2022                 con = op2;
2023         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2024                 cmp_val = get_inversed_pnc(cmp_val);
2025                 var = op2->reference.declaration;
2026                 con = op1;
2027         }
2028
2029         if (var != NULL) {
2030                 type_t  *const type = skip_typeref(var->type);
2031                 ir_mode *const mode = get_ir_mode(type);
2032
2033                 res = get_value(var->v.value_number, mode);
2034                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2035                 set_value(var->v.value_number, res);
2036         }
2037         return res;
2038 }
2039
2040 /**
2041  * Handle the assume optimizer hint.
2042  *
2043  * @param dbi    debug info
2044  * @param expr   the IL assume expression
2045  */
2046 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2047         switch(expression->kind) {
2048         case EXPR_BINARY_EQUAL:
2049         case EXPR_BINARY_NOTEQUAL:
2050         case EXPR_BINARY_LESS:
2051         case EXPR_BINARY_LESSEQUAL:
2052         case EXPR_BINARY_GREATER:
2053         case EXPR_BINARY_GREATEREQUAL:
2054                 return handle_assume_compare(dbi, &expression->binary);
2055         default:
2056                 return NULL;
2057         }
2058 }
2059
2060 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2061 {
2062         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2063         type_t   *type = skip_typeref(expression->base.type);
2064
2065         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2066                 return expression_to_addr(expression->value);
2067
2068         const expression_t *value = expression->value;
2069
2070         switch(expression->base.kind) {
2071         case EXPR_UNARY_NEGATE: {
2072                 ir_node *value_node = expression_to_firm(value);
2073                 ir_mode *mode = get_ir_mode(type);
2074                 return new_d_Minus(dbgi, value_node, mode);
2075         }
2076         case EXPR_UNARY_PLUS:
2077                 return expression_to_firm(value);
2078         case EXPR_UNARY_BITWISE_NEGATE: {
2079                 ir_node *value_node = expression_to_firm(value);
2080                 ir_mode *mode = get_ir_mode(type);
2081                 return new_d_Not(dbgi, value_node, mode);
2082         }
2083         case EXPR_UNARY_NOT: {
2084                 ir_node *value_node = _expression_to_firm(value);
2085                 value_node          = create_conv(dbgi, value_node, mode_b);
2086                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2087                 return res;
2088         }
2089         case EXPR_UNARY_DEREFERENCE: {
2090                 ir_node *value_node = expression_to_firm(value);
2091                 type_t  *value_type = skip_typeref(value->base.type);
2092                 assert(is_type_pointer(value_type));
2093                 type_t  *points_to  = value_type->pointer.points_to;
2094                 return deref_address(dbgi, points_to, value_node);
2095         }
2096         case EXPR_UNARY_POSTFIX_INCREMENT:
2097         case EXPR_UNARY_POSTFIX_DECREMENT:
2098         case EXPR_UNARY_PREFIX_INCREMENT:
2099         case EXPR_UNARY_PREFIX_DECREMENT:
2100                 return create_incdec(expression);
2101         case EXPR_UNARY_CAST: {
2102                 ir_node *value_node = expression_to_firm(value);
2103                 if (is_type_scalar(type)) {
2104                         ir_mode *mode = get_ir_mode(type);
2105                         ir_node *node = create_conv(dbgi, value_node, mode);
2106                         node = do_strict_conv(dbgi, node);
2107                         return node;
2108                 } else {
2109                         /* make sure firm type is constructed */
2110                         (void) get_ir_type(type);
2111                         return value_node;
2112                 }
2113         }
2114         case EXPR_UNARY_CAST_IMPLICIT: {
2115                 ir_node *value_node = expression_to_firm(value);
2116                 if (is_type_scalar(type)) {
2117                         ir_mode *mode = get_ir_mode(type);
2118                         return create_conv(dbgi, value_node, mode);
2119                 } else {
2120                         return value_node;
2121                 }
2122         }
2123         case EXPR_UNARY_ASSUME:
2124                 if (firm_opt.confirm)
2125                         return handle_assume(dbgi, value);
2126                 else
2127                         return NULL;
2128
2129         default:
2130                 break;
2131         }
2132         panic("invalid UNEXPR type found");
2133 }
2134
2135 /**
2136  * produces a 0/1 depending of the value of a mode_b node
2137  */
2138 static ir_node *produce_condition_result(const expression_t *expression,
2139                                          dbg_info *dbgi)
2140 {
2141         ir_mode *mode      = get_ir_mode(expression->base.type);
2142         ir_node *cur_block = get_cur_block();
2143
2144         ir_node *one_block = new_immBlock();
2145         ir_node *one       = new_Const(mode, get_mode_one(mode));
2146         ir_node *jmp_one   = new_d_Jmp(dbgi);
2147
2148         ir_node *zero_block = new_immBlock();
2149         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2150         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2151
2152         set_cur_block(cur_block);
2153         create_condition_evaluation(expression, one_block, zero_block);
2154         mature_immBlock(one_block);
2155         mature_immBlock(zero_block);
2156
2157         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2158         new_Block(2, in_cf);
2159
2160         ir_node *in[2] = { one, zero };
2161         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2162
2163         return val;
2164 }
2165
2166 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2167                 ir_node *value, type_t *type)
2168 {
2169         pointer_type_t *const pointer_type = &type->pointer;
2170         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2171         unsigned              elem_size    = get_type_size_const(points_to);
2172
2173         /* gcc extension: allow arithmetic with void * and function * */
2174         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2175             is_type_function(points_to))  {
2176                 elem_size = 1;
2177         }
2178
2179         assert(elem_size >= 1);
2180         if (elem_size == 1)
2181                 return value;
2182
2183         value = create_conv(dbgi, value, mode_int);
2184         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2185         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2186         return mul;
2187 }
2188
2189 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2190                           ir_node *left, ir_node *right)
2191 {
2192         ir_mode  *mode;
2193         type_t   *type_left  = skip_typeref(expression->left->base.type);
2194         type_t   *type_right = skip_typeref(expression->right->base.type);
2195
2196         expression_kind_t kind = expression->base.kind;
2197
2198         switch (kind) {
2199         case EXPR_BINARY_SHIFTLEFT:
2200         case EXPR_BINARY_SHIFTRIGHT:
2201         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2202         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2203                 mode  = get_irn_mode(left);
2204                 right = create_conv(dbgi, right, mode_uint);
2205                 break;
2206
2207         case EXPR_BINARY_SUB:
2208                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2209                         const pointer_type_t *const ptr_type = &type_left->pointer;
2210
2211                         mode = get_ir_mode(expression->base.type);
2212                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2213                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2214                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2215                         ir_node *const no_mem    = new_NoMem();
2216                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2217                                                                                                    mode, op_pin_state_floats);
2218                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2219                 }
2220                 /* fallthrough */
2221         case EXPR_BINARY_SUB_ASSIGN:
2222                 if (is_type_pointer(type_left)) {
2223                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2224                         mode  = get_ir_mode(type_left);
2225                         break;
2226                 }
2227                 goto normal_node;
2228
2229         case EXPR_BINARY_ADD:
2230         case EXPR_BINARY_ADD_ASSIGN:
2231                 if (is_type_pointer(type_left)) {
2232                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2233                         mode  = get_ir_mode(type_left);
2234                         break;
2235                 } else if (is_type_pointer(type_right)) {
2236                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2237                         mode  = get_ir_mode(type_right);
2238                         break;
2239                 }
2240                 goto normal_node;
2241
2242         default:
2243 normal_node:
2244                 mode = get_irn_mode(right);
2245                 left = create_conv(dbgi, left, mode);
2246                 break;
2247         }
2248
2249         switch (kind) {
2250         case EXPR_BINARY_ADD_ASSIGN:
2251         case EXPR_BINARY_ADD:
2252                 return new_d_Add(dbgi, left, right, mode);
2253         case EXPR_BINARY_SUB_ASSIGN:
2254         case EXPR_BINARY_SUB:
2255                 return new_d_Sub(dbgi, left, right, mode);
2256         case EXPR_BINARY_MUL_ASSIGN:
2257         case EXPR_BINARY_MUL:
2258                 return new_d_Mul(dbgi, left, right, mode);
2259         case EXPR_BINARY_BITWISE_AND:
2260         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2261                 return new_d_And(dbgi, left, right, mode);
2262         case EXPR_BINARY_BITWISE_OR:
2263         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2264                 return new_d_Or(dbgi, left, right, mode);
2265         case EXPR_BINARY_BITWISE_XOR:
2266         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2267                 return new_d_Eor(dbgi, left, right, mode);
2268         case EXPR_BINARY_SHIFTLEFT:
2269         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2270                 return new_d_Shl(dbgi, left, right, mode);
2271         case EXPR_BINARY_SHIFTRIGHT:
2272         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2273                 if (mode_is_signed(mode)) {
2274                         return new_d_Shrs(dbgi, left, right, mode);
2275                 } else {
2276                         return new_d_Shr(dbgi, left, right, mode);
2277                 }
2278         case EXPR_BINARY_DIV:
2279         case EXPR_BINARY_DIV_ASSIGN: {
2280                 ir_node *pin = new_Pin(new_NoMem());
2281                 ir_node *op;
2282                 ir_node *res;
2283                 if (mode_is_float(mode)) {
2284                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2285                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2286                 } else {
2287                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2288                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2289                 }
2290                 return res;
2291         }
2292         case EXPR_BINARY_MOD:
2293         case EXPR_BINARY_MOD_ASSIGN: {
2294                 ir_node *pin = new_Pin(new_NoMem());
2295                 assert(!mode_is_float(mode));
2296                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2297                                          op_pin_state_floats);
2298                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2299                 return res;
2300         }
2301         default:
2302                 panic("unexpected expression kind");
2303         }
2304 }
2305
2306 static ir_node *create_lazy_op(const binary_expression_t *expression)
2307 {
2308         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2309         type_t   *type = expression->base.type;
2310         ir_mode  *mode = get_ir_mode(type);
2311
2312         if (is_constant_expression(expression->left)) {
2313                 long val = fold_constant(expression->left);
2314                 expression_kind_t ekind = expression->base.kind;
2315                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2316                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2317                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2318                         return expression_to_firm(expression->right);
2319                 } else {
2320                         return new_Const(mode, get_mode_one(mode));
2321                 }
2322         }
2323
2324         return produce_condition_result((const expression_t*) expression, dbgi);
2325 }
2326
2327 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2328                                             ir_node *right, ir_mode *mode);
2329
2330 static ir_node *create_assign_binop(const binary_expression_t *expression)
2331 {
2332         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2333         const expression_t *left_expr = expression->left;
2334         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2335         ir_node            *right     = expression_to_firm(expression->right);
2336         ir_node            *left_addr = expression_to_addr(left_expr);
2337         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2338         ir_node            *result    = create_op(dbgi, expression, left, right);
2339
2340         result = create_conv(dbgi, result, left_mode);
2341         result = do_strict_conv(dbgi, result);
2342
2343         set_value_for_expression_addr(left_expr, result, left_addr);
2344
2345         return result;
2346 }
2347
2348 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2349 {
2350         expression_kind_t kind = expression->base.kind;
2351
2352         switch(kind) {
2353         case EXPR_BINARY_EQUAL:
2354         case EXPR_BINARY_NOTEQUAL:
2355         case EXPR_BINARY_LESS:
2356         case EXPR_BINARY_LESSEQUAL:
2357         case EXPR_BINARY_GREATER:
2358         case EXPR_BINARY_GREATEREQUAL:
2359         case EXPR_BINARY_ISGREATER:
2360         case EXPR_BINARY_ISGREATEREQUAL:
2361         case EXPR_BINARY_ISLESS:
2362         case EXPR_BINARY_ISLESSEQUAL:
2363         case EXPR_BINARY_ISLESSGREATER:
2364         case EXPR_BINARY_ISUNORDERED: {
2365                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2366                 ir_node *left  = expression_to_firm(expression->left);
2367                 ir_node *right = expression_to_firm(expression->right);
2368                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2369                 long     pnc   = get_pnc(kind, expression->left->base.type);
2370                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2371                 return proj;
2372         }
2373         case EXPR_BINARY_ASSIGN: {
2374                 ir_node *addr  = expression_to_addr(expression->left);
2375                 ir_node *right = expression_to_firm(expression->right);
2376                 set_value_for_expression_addr(expression->left, right, addr);
2377
2378                 return right;
2379         }
2380         case EXPR_BINARY_ADD:
2381         case EXPR_BINARY_SUB:
2382         case EXPR_BINARY_MUL:
2383         case EXPR_BINARY_DIV:
2384         case EXPR_BINARY_MOD:
2385         case EXPR_BINARY_BITWISE_AND:
2386         case EXPR_BINARY_BITWISE_OR:
2387         case EXPR_BINARY_BITWISE_XOR:
2388         case EXPR_BINARY_SHIFTLEFT:
2389         case EXPR_BINARY_SHIFTRIGHT:
2390         {
2391                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2392                 ir_node  *left  = expression_to_firm(expression->left);
2393                 ir_node  *right = expression_to_firm(expression->right);
2394                 return create_op(dbgi, expression, left, right);
2395         }
2396         case EXPR_BINARY_LOGICAL_AND:
2397         case EXPR_BINARY_LOGICAL_OR:
2398                 return create_lazy_op(expression);
2399         case EXPR_BINARY_COMMA:
2400                 /* create side effects of left side */
2401                 (void) expression_to_firm(expression->left);
2402                 return _expression_to_firm(expression->right);
2403
2404         case EXPR_BINARY_ADD_ASSIGN:
2405         case EXPR_BINARY_SUB_ASSIGN:
2406         case EXPR_BINARY_MUL_ASSIGN:
2407         case EXPR_BINARY_MOD_ASSIGN:
2408         case EXPR_BINARY_DIV_ASSIGN:
2409         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2410         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2411         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2412         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2413         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2414                 return create_assign_binop(expression);
2415         case EXPR_BINARY_BUILTIN_EXPECT:
2416                 return _expression_to_firm(expression->left);
2417         default:
2418                 panic("TODO binexpr type");
2419         }
2420 }
2421
2422 static ir_node *array_access_addr(const array_access_expression_t *expression)
2423 {
2424         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2425         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2426         ir_node  *offset    = expression_to_firm(expression->index);
2427
2428         type_t  *offset_type = skip_typeref(expression->index->base.type);
2429         ir_mode *mode;
2430         if (is_type_signed(offset_type)) {
2431                 mode = get_ir_mode(type_ssize_t);
2432         } else {
2433                 mode = get_ir_mode(type_size_t);
2434         }
2435         offset = create_conv(dbgi, offset, mode);
2436
2437         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2438         assert(is_type_pointer(ref_type));
2439         pointer_type_t *pointer_type = &ref_type->pointer;
2440
2441         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2442         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2443         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2444                                              mode);
2445         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2446
2447         return result;
2448 }
2449
2450 static ir_node *array_access_to_firm(
2451                 const array_access_expression_t *expression)
2452 {
2453         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2454         ir_node  *addr   = array_access_addr(expression);
2455         type_t   *type   = revert_automatic_type_conversion(
2456                         (const expression_t*) expression);
2457         type             = skip_typeref(type);
2458
2459         return deref_address(dbgi, type, addr);
2460 }
2461
2462 static long get_offsetof_offset(const offsetof_expression_t *expression)
2463 {
2464         type_t *orig_type = expression->type;
2465         long    offset    = 0;
2466
2467         designator_t *designator = expression->designator;
2468         for( ; designator != NULL; designator = designator->next) {
2469                 type_t *type = skip_typeref(orig_type);
2470                 /* be sure the type is constructed */
2471                 (void) get_ir_type(type);
2472
2473                 if (designator->symbol != NULL) {
2474                         assert(is_type_compound(type));
2475                         symbol_t *symbol = designator->symbol;
2476
2477                         declaration_t *declaration = type->compound.declaration;
2478                         declaration_t *iter        = declaration->scope.declarations;
2479                         for( ; iter != NULL; iter = iter->next) {
2480                                 if (iter->symbol == symbol) {
2481                                         break;
2482                                 }
2483                         }
2484                         assert(iter != NULL);
2485
2486                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2487                         offset += get_entity_offset(iter->v.entity);
2488
2489                         orig_type = iter->type;
2490                 } else {
2491                         expression_t *array_index = designator->array_index;
2492                         assert(designator->array_index != NULL);
2493                         assert(is_type_array(type));
2494                         assert(is_type_valid(array_index->base.type));
2495
2496                         long index         = fold_constant(array_index);
2497                         ir_type *arr_type  = get_ir_type(type);
2498                         ir_type *elem_type = get_array_element_type(arr_type);
2499                         long     elem_size = get_type_size_bytes(elem_type);
2500
2501                         offset += index * elem_size;
2502
2503                         orig_type = type->array.element_type;
2504                 }
2505         }
2506
2507         return offset;
2508 }
2509
2510 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2511 {
2512         ir_mode  *mode   = get_ir_mode(expression->base.type);
2513         long      offset = get_offsetof_offset(expression);
2514         tarval   *tv     = new_tarval_from_long(offset, mode);
2515         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2516
2517         return new_d_Const(dbgi, mode, tv);
2518 }
2519
2520 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2521                                      ir_entity *entity, type_t *type);
2522
2523 static ir_node *compound_literal_to_firm(
2524                 const compound_literal_expression_t *expression)
2525 {
2526         type_t *type = expression->type;
2527
2528         /* create an entity on the stack */
2529         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2530
2531         ident     *const id     = id_unique("CompLit.%u");
2532         ir_type   *const irtype = get_ir_type(type);
2533         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2534         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2535         set_entity_ld_ident(entity, id);
2536
2537         set_entity_variability(entity, variability_uninitialized);
2538
2539         /* create initialisation code */
2540         initializer_t *initializer = expression->initializer;
2541         create_local_initializer(initializer, dbgi, entity, type);
2542
2543         /* create a sel for the compound literal address */
2544         ir_node *frame = get_local_frame(entity);
2545         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2546         return sel;
2547 }
2548
2549 /**
2550  * Transform a sizeof expression into Firm code.
2551  */
2552 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2553 {
2554         type_t *type = expression->type;
2555         if (type == NULL) {
2556                 type = expression->tp_expression->base.type;
2557                 assert(type != NULL);
2558         }
2559
2560         type = skip_typeref(type);
2561         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2562         if (is_type_array(type) && type->array.is_vla
2563                         && expression->tp_expression != NULL) {
2564                 expression_to_firm(expression->tp_expression);
2565         }
2566
2567         return get_type_size(type);
2568 }
2569
2570 /**
2571  * Transform an alignof expression into Firm code.
2572  */
2573 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2574 {
2575         type_t *type = expression->type;
2576         if (type == NULL) {
2577                 /* beware: if expression is a variable reference, return the
2578                    alignment of the variable. */
2579                 const expression_t *tp_expression = expression->tp_expression;
2580                 const declaration_t *declaration = expr_is_variable(tp_expression);
2581                 if (declaration != NULL) {
2582                         /* TODO: get the alignment of this variable. */
2583                 }
2584                 type = tp_expression->base.type;
2585                 assert(type != NULL);
2586         }
2587
2588         ir_mode *const mode = get_ir_mode(expression->base.type);
2589         symconst_symbol sym;
2590         sym.type_p = get_ir_type(type);
2591         return new_SymConst(mode, sym, symconst_type_align);
2592 }
2593
2594 static void init_ir_types(void);
2595
2596 long fold_constant(const expression_t *expression)
2597 {
2598         bool constant_folding_old = constant_folding;
2599         constant_folding = true;
2600
2601         init_ir_types();
2602
2603         assert(is_constant_expression(expression));
2604
2605         ir_graph *old_current_ir_graph = current_ir_graph;
2606         if (current_ir_graph == NULL) {
2607                 current_ir_graph = get_const_code_irg();
2608         }
2609
2610         ir_node *cnst = expression_to_firm(expression);
2611         current_ir_graph = old_current_ir_graph;
2612
2613         if (!is_Const(cnst)) {
2614                 panic("couldn't fold constant\n");
2615         }
2616
2617         tarval *tv = get_Const_tarval(cnst);
2618         if (!tarval_is_long(tv)) {
2619                 panic("result of constant folding is not integer\n");
2620         }
2621
2622         constant_folding = constant_folding_old;
2623
2624         return get_tarval_long(tv);
2625 }
2626
2627 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2628 {
2629         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2630
2631         /* first try to fold a constant condition */
2632         if (is_constant_expression(expression->condition)) {
2633                 long val = fold_constant(expression->condition);
2634                 if (val) {
2635                         expression_t *true_expression = expression->true_expression;
2636                         if (true_expression == NULL)
2637                                 true_expression = expression->condition;
2638                         return expression_to_firm(true_expression);
2639                 } else {
2640                         return expression_to_firm(expression->false_expression);
2641                 }
2642         }
2643
2644         ir_node *cur_block   = get_cur_block();
2645
2646         /* create the true block */
2647         ir_node *true_block  = new_immBlock();
2648
2649         ir_node *true_val = expression->true_expression != NULL ?
2650                 expression_to_firm(expression->true_expression) : NULL;
2651         ir_node *true_jmp = new_Jmp();
2652
2653         /* create the false block */
2654         ir_node *false_block = new_immBlock();
2655
2656         ir_node *false_val = expression_to_firm(expression->false_expression);
2657         ir_node *false_jmp = new_Jmp();
2658
2659         /* create the condition evaluation */
2660         set_cur_block(cur_block);
2661         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2662         if (expression->true_expression == NULL) {
2663                 if (cond_expr != NULL) {
2664                         true_val = cond_expr;
2665                 } else {
2666                         /* Condition ended with a short circuit (&&, ||, !) operation.
2667                          * Generate a "1" as value for the true branch. */
2668                         ir_mode *const mode = mode_Is;
2669                         true_val = new_Const(mode, get_mode_one(mode));
2670                 }
2671         }
2672         mature_immBlock(true_block);
2673         mature_immBlock(false_block);
2674
2675         /* create the common block */
2676         ir_node *in_cf[2] = { true_jmp, false_jmp };
2677         new_Block(2, in_cf);
2678
2679         /* TODO improve static semantics, so either both or no values are NULL */
2680         if (true_val == NULL || false_val == NULL)
2681                 return NULL;
2682
2683         ir_node *in[2] = { true_val, false_val };
2684         ir_mode *mode  = get_irn_mode(true_val);
2685         assert(get_irn_mode(false_val) == mode);
2686         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2687
2688         return val;
2689 }
2690
2691 /**
2692  * Returns an IR-node representing the address of a field.
2693  */
2694 static ir_node *select_addr(const select_expression_t *expression)
2695 {
2696         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2697
2698         ir_node *compound_addr = expression_to_firm(expression->compound);
2699
2700         /* make sure the type is constructed */
2701         type_t *type = skip_typeref(expression->compound->base.type);
2702         if (is_type_pointer(type)) {
2703                 type = type->pointer.points_to;
2704         }
2705         (void) get_ir_type(type);
2706
2707         declaration_t *entry = expression->compound_entry;
2708         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2709         ir_entity     *entity = entry->v.entity;
2710
2711         assert(entity != NULL);
2712
2713         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2714
2715         return sel;
2716 }
2717
2718 static ir_node *select_to_firm(const select_expression_t *expression)
2719 {
2720         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2721         ir_node  *addr = select_addr(expression);
2722         type_t   *type = revert_automatic_type_conversion(
2723                         (const expression_t*) expression);
2724         type           = skip_typeref(type);
2725
2726         declaration_t *entry      = expression->compound_entry;
2727         type_t        *entry_type = skip_typeref(entry->type);
2728
2729         if (entry_type->kind == TYPE_BITFIELD) {
2730                 return bitfield_extract_to_firm(expression, addr);
2731         }
2732
2733         return deref_address(dbgi, type, addr);
2734 }
2735
2736 /* Values returned by __builtin_classify_type. */
2737 typedef enum gcc_type_class
2738 {
2739         no_type_class = -1,
2740         void_type_class,
2741         integer_type_class,
2742         char_type_class,
2743         enumeral_type_class,
2744         boolean_type_class,
2745         pointer_type_class,
2746         reference_type_class,
2747         offset_type_class,
2748         real_type_class,
2749         complex_type_class,
2750         function_type_class,
2751         method_type_class,
2752         record_type_class,
2753         union_type_class,
2754         array_type_class,
2755         string_type_class,
2756         set_type_class,
2757         file_type_class,
2758         lang_type_class
2759 } gcc_type_class;
2760
2761 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2762 {
2763         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2764
2765         gcc_type_class tc;
2766         switch (type->kind)
2767         {
2768                 case TYPE_ATOMIC: {
2769                         const atomic_type_t *const atomic_type = &type->atomic;
2770                         switch (atomic_type->akind) {
2771                                 /* should not be reached */
2772                                 case ATOMIC_TYPE_INVALID:
2773                                         tc = no_type_class;
2774                                         goto make_const;
2775
2776                                 /* gcc cannot do that */
2777                                 case ATOMIC_TYPE_VOID:
2778                                         tc = void_type_class;
2779                                         goto make_const;
2780
2781                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2782                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2783                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2784                                 case ATOMIC_TYPE_SHORT:
2785                                 case ATOMIC_TYPE_USHORT:
2786                                 case ATOMIC_TYPE_INT:
2787                                 case ATOMIC_TYPE_UINT:
2788                                 case ATOMIC_TYPE_LONG:
2789                                 case ATOMIC_TYPE_ULONG:
2790                                 case ATOMIC_TYPE_LONGLONG:
2791                                 case ATOMIC_TYPE_ULONGLONG:
2792                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2793                                         tc = integer_type_class;
2794                                         goto make_const;
2795
2796                                 case ATOMIC_TYPE_FLOAT:
2797                                 case ATOMIC_TYPE_DOUBLE:
2798                                 case ATOMIC_TYPE_LONG_DOUBLE:
2799                                         tc = real_type_class;
2800                                         goto make_const;
2801                         }
2802                         panic("Unexpected atomic type in classify_type_to_firm().");
2803                 }
2804
2805                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2806                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2807                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2808                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2809                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2810                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2811                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2812                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2813
2814                 /* gcc handles this as integer */
2815                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2816
2817                 case TYPE_BUILTIN:
2818                 /* typedef/typeof should be skipped already */
2819                 case TYPE_TYPEDEF:
2820                 case TYPE_TYPEOF:
2821                 case TYPE_INVALID:
2822                 case TYPE_ERROR:
2823                         break;
2824         }
2825         panic("unexpected TYPE classify_type_to_firm().");
2826
2827 make_const: ;
2828         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2829         ir_mode  *const mode = mode_int;
2830         tarval   *const tv   = new_tarval_from_long(tc, mode);
2831         return new_d_Const(dbgi, mode, tv);
2832 }
2833
2834 static ir_node *function_name_to_firm(
2835                 const funcname_expression_t *const expr)
2836 {
2837         switch(expr->kind) {
2838         case FUNCNAME_FUNCTION:
2839         case FUNCNAME_PRETTY_FUNCTION:
2840         case FUNCNAME_FUNCDNAME:
2841                 if (current_function_name == NULL) {
2842                         const source_position_t *const src_pos = &expr->base.source_position;
2843                         const char *const name = current_function_decl->symbol->string;
2844                         const string_t string = { name, strlen(name) + 1 };
2845                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2846                 }
2847                 return current_function_name;
2848         case FUNCNAME_FUNCSIG:
2849                 if (current_funcsig == NULL) {
2850                         const source_position_t *const src_pos = &expr->base.source_position;
2851                         ir_entity *ent = get_irg_entity(current_ir_graph);
2852                         const char *const name = get_entity_ld_name(ent);
2853                         const string_t string = { name, strlen(name) + 1 };
2854                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2855                 }
2856                 return current_funcsig;
2857         }
2858         panic("Unsupported function name");
2859 }
2860
2861 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2862 {
2863         statement_t *statement = expr->statement;
2864
2865         assert(statement->kind == STATEMENT_COMPOUND);
2866         return compound_statement_to_firm(&statement->compound);
2867 }
2868
2869 static ir_node *va_start_expression_to_firm(
2870         const va_start_expression_t *const expr)
2871 {
2872         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2873         int        const n           = get_method_n_params(method_type) - 1;
2874         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2875         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2876         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2877         ir_node   *const no_mem      = new_NoMem();
2878         ir_node   *const arg_sel     =
2879                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2880
2881         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2882         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2883         set_value_for_expression(expr->ap, add);
2884
2885         return NULL;
2886 }
2887
2888 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2889 {
2890         type_t       *const type    = expr->base.type;
2891         expression_t *const ap_expr = expr->ap;
2892         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2893         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2894         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2895         ir_node      *const res     = deref_address(dbgi, type, ap);
2896
2897         ir_node      *const cnst    = get_type_size(expr->base.type);
2898         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2899
2900         set_value_for_expression_addr(ap_expr, add, ap_addr);
2901
2902         return res;
2903 }
2904
2905 static ir_node *dereference_addr(const unary_expression_t *const expression)
2906 {
2907         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2908         return expression_to_firm(expression->value);
2909 }
2910
2911 /**
2912  * Returns a IR-node representing an lvalue of the given expression.
2913  */
2914 static ir_node *expression_to_addr(const expression_t *expression)
2915 {
2916         switch(expression->kind) {
2917         case EXPR_REFERENCE:
2918                 return reference_addr(&expression->reference);
2919         case EXPR_ARRAY_ACCESS:
2920                 return array_access_addr(&expression->array_access);
2921         case EXPR_SELECT:
2922                 return select_addr(&expression->select);
2923         case EXPR_CALL:
2924                 return call_expression_to_firm(&expression->call);
2925         case EXPR_UNARY_DEREFERENCE: {
2926                 return dereference_addr(&expression->unary);
2927         }
2928         default:
2929                 break;
2930         }
2931         panic("trying to get address of non-lvalue");
2932 }
2933
2934 static ir_node *builtin_constant_to_firm(
2935                 const builtin_constant_expression_t *expression)
2936 {
2937         ir_mode *mode = get_ir_mode(expression->base.type);
2938         long     v;
2939
2940         if (is_constant_expression(expression->value)) {
2941                 v = 1;
2942         } else {
2943                 v = 0;
2944         }
2945         return new_Const_long(mode, v);
2946 }
2947
2948 static ir_node *builtin_prefetch_to_firm(
2949                 const builtin_prefetch_expression_t *expression)
2950 {
2951         ir_node *adr = expression_to_firm(expression->adr);
2952         /* no Firm support for prefetch yet */
2953         (void) adr;
2954         return NULL;
2955 }
2956
2957 static ir_node *get_label_block(declaration_t *label)
2958 {
2959         assert(label->namespc == NAMESPACE_LABEL || label->namespc == NAMESPACE_LOCAL_LABEL);
2960
2961         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
2962                 return label->v.block;
2963         }
2964         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
2965
2966         /* beware: might be called from create initializer with current_ir_graph
2967          * set to const_code_irg. */
2968         ir_graph *rem    = current_ir_graph;
2969         current_ir_graph = current_function;
2970
2971         ir_node *old_cur_block = get_cur_block();
2972         ir_node *block         = new_immBlock();
2973         set_cur_block(old_cur_block);
2974
2975         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
2976         label->v.block          = block;
2977
2978         ARR_APP1(declaration_t *, all_labels, label);
2979
2980         current_ir_graph = rem;
2981         return block;
2982 }
2983
2984 /**
2985  * Pointer to a label.  This is used for the
2986  * GNU address-of-label extension.
2987  */
2988 static ir_node *label_address_to_firm(
2989                 const label_address_expression_t *label)
2990 {
2991         ir_node    *block = get_label_block(label->declaration);
2992         ir_label_t  nr    = get_Block_label(block);
2993
2994         if (nr == 0) {
2995                 nr = get_irp_next_label_nr();
2996                 set_Block_label(block, nr);
2997         }
2998         symconst_symbol value;
2999         value.label = nr;
3000         return new_SymConst(mode_P_code, value, symconst_label);
3001 }
3002
3003 /**
3004  * creates firm nodes for an expression. The difference between this function
3005  * and expression_to_firm is, that this version might produce mode_b nodes
3006  * instead of mode_Is.
3007  */
3008 static ir_node *_expression_to_firm(const expression_t *expression)
3009 {
3010 #ifndef NDEBUG
3011         if (!constant_folding) {
3012                 assert(!expression->base.transformed);
3013                 ((expression_t*) expression)->base.transformed = true;
3014         }
3015 #endif
3016
3017         switch (expression->kind) {
3018         case EXPR_CHARACTER_CONSTANT:
3019                 return character_constant_to_firm(&expression->conste);
3020         case EXPR_WIDE_CHARACTER_CONSTANT:
3021                 return wide_character_constant_to_firm(&expression->conste);
3022         case EXPR_CONST:
3023                 return const_to_firm(&expression->conste);
3024         case EXPR_STRING_LITERAL:
3025                 return string_literal_to_firm(&expression->string);
3026         case EXPR_WIDE_STRING_LITERAL:
3027                 return wide_string_literal_to_firm(&expression->wide_string);
3028         case EXPR_REFERENCE:
3029                 return reference_expression_to_firm(&expression->reference);
3030         case EXPR_CALL:
3031                 return call_expression_to_firm(&expression->call);
3032         EXPR_UNARY_CASES
3033                 return unary_expression_to_firm(&expression->unary);
3034         EXPR_BINARY_CASES
3035                 return binary_expression_to_firm(&expression->binary);
3036         case EXPR_ARRAY_ACCESS:
3037                 return array_access_to_firm(&expression->array_access);
3038         case EXPR_SIZEOF:
3039                 return sizeof_to_firm(&expression->typeprop);
3040         case EXPR_ALIGNOF:
3041                 return alignof_to_firm(&expression->typeprop);
3042         case EXPR_CONDITIONAL:
3043                 return conditional_to_firm(&expression->conditional);
3044         case EXPR_SELECT:
3045                 return select_to_firm(&expression->select);
3046         case EXPR_CLASSIFY_TYPE:
3047                 return classify_type_to_firm(&expression->classify_type);
3048         case EXPR_FUNCNAME:
3049                 return function_name_to_firm(&expression->funcname);
3050         case EXPR_STATEMENT:
3051                 return statement_expression_to_firm(&expression->statement);
3052         case EXPR_VA_START:
3053                 return va_start_expression_to_firm(&expression->va_starte);
3054         case EXPR_VA_ARG:
3055                 return va_arg_expression_to_firm(&expression->va_arge);
3056         case EXPR_BUILTIN_SYMBOL:
3057                 panic("unimplemented expression found");
3058         case EXPR_BUILTIN_CONSTANT_P:
3059                 return builtin_constant_to_firm(&expression->builtin_constant);
3060         case EXPR_BUILTIN_PREFETCH:
3061                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3062         case EXPR_OFFSETOF:
3063                 return offsetof_to_firm(&expression->offsetofe);
3064         case EXPR_COMPOUND_LITERAL:
3065                 return compound_literal_to_firm(&expression->compound_literal);
3066         case EXPR_LABEL_ADDRESS:
3067                 return label_address_to_firm(&expression->label_address);
3068
3069         case EXPR_UNKNOWN:
3070         case EXPR_INVALID:
3071                 break;
3072         }
3073         panic("invalid expression found");
3074 }
3075
3076 static bool produces_mode_b(const expression_t *expression)
3077 {
3078         switch (expression->kind) {
3079         case EXPR_BINARY_EQUAL:
3080         case EXPR_BINARY_NOTEQUAL:
3081         case EXPR_BINARY_LESS:
3082         case EXPR_BINARY_LESSEQUAL:
3083         case EXPR_BINARY_GREATER:
3084         case EXPR_BINARY_GREATEREQUAL:
3085         case EXPR_BINARY_ISGREATER:
3086         case EXPR_BINARY_ISGREATEREQUAL:
3087         case EXPR_BINARY_ISLESS:
3088         case EXPR_BINARY_ISLESSEQUAL:
3089         case EXPR_BINARY_ISLESSGREATER:
3090         case EXPR_BINARY_ISUNORDERED:
3091         case EXPR_UNARY_NOT:
3092                 return true;
3093
3094         case EXPR_BINARY_BUILTIN_EXPECT:
3095                 return produces_mode_b(expression->binary.left);
3096         case EXPR_BINARY_COMMA:
3097                 return produces_mode_b(expression->binary.right);
3098
3099         default:
3100                 return false;
3101         }
3102 }
3103
3104 static ir_node *expression_to_firm(const expression_t *expression)
3105 {
3106         if (!produces_mode_b(expression)) {
3107                 ir_node *res = _expression_to_firm(expression);
3108                 assert(res == NULL || get_irn_mode(res) != mode_b);
3109                 return res;
3110         }
3111
3112         if (is_constant_expression(expression)) {
3113                 ir_node *res  = _expression_to_firm(expression);
3114                 ir_mode *mode = get_ir_mode(expression->base.type);
3115                 assert(is_Const(res));
3116                 if (is_Const_null(res)) {
3117                         return new_Const_long(mode, 0);
3118                 } else {
3119                         return new_Const_long(mode, 1);
3120                 }
3121         }
3122
3123         /* we have to produce a 0/1 from the mode_b expression */
3124         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3125         return produce_condition_result(expression, dbgi);
3126 }
3127
3128 /**
3129  * create a short-circuit expression evaluation that tries to construct
3130  * efficient control flow structures for &&, || and ! expressions
3131  */
3132 static ir_node *create_condition_evaluation(const expression_t *expression,
3133                                             ir_node *true_block,
3134                                             ir_node *false_block)
3135 {
3136         switch(expression->kind) {
3137         case EXPR_UNARY_NOT: {
3138                 const unary_expression_t *unary_expression = &expression->unary;
3139                 create_condition_evaluation(unary_expression->value, false_block,
3140                                             true_block);
3141                 return NULL;
3142         }
3143         case EXPR_BINARY_LOGICAL_AND: {
3144                 const binary_expression_t *binary_expression = &expression->binary;
3145
3146                 ir_node *cur_block   = get_cur_block();
3147                 ir_node *extra_block = new_immBlock();
3148                 set_cur_block(cur_block);
3149                 create_condition_evaluation(binary_expression->left, extra_block,
3150                                             false_block);
3151                 mature_immBlock(extra_block);
3152                 set_cur_block(extra_block);
3153                 create_condition_evaluation(binary_expression->right, true_block,
3154                                             false_block);
3155                 return NULL;
3156         }
3157         case EXPR_BINARY_LOGICAL_OR: {
3158                 const binary_expression_t *binary_expression = &expression->binary;
3159
3160                 ir_node *cur_block   = get_cur_block();
3161                 ir_node *extra_block = new_immBlock();
3162                 set_cur_block(cur_block);
3163                 create_condition_evaluation(binary_expression->left, true_block,
3164                                             extra_block);
3165                 mature_immBlock(extra_block);
3166                 set_cur_block(extra_block);
3167                 create_condition_evaluation(binary_expression->right, true_block,
3168                                             false_block);
3169                 return NULL;
3170         }
3171         default:
3172                 break;
3173         }
3174
3175         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3176         ir_node  *cond_expr  = _expression_to_firm(expression);
3177         ir_node  *condition  = create_conv(NULL, cond_expr, mode_b);
3178         ir_node  *cond       = new_d_Cond(dbgi, condition);
3179         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3180         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3181
3182         /* set branch prediction info based on __builtin_expect */
3183         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3184                 long               cnst = fold_constant(expression->binary.right);
3185                 cond_jmp_predicate pred;
3186
3187                 if (cnst == 0) {
3188                         pred = COND_JMP_PRED_FALSE;
3189                 } else {
3190                         pred = COND_JMP_PRED_TRUE;
3191                 }
3192                 set_Cond_jmp_pred(cond, pred);
3193         }
3194
3195         add_immBlock_pred(true_block, true_proj);
3196         if (false_block != NULL) {
3197                 add_immBlock_pred(false_block, false_proj);
3198         }
3199
3200         set_cur_block(NULL);
3201         return cond_expr;
3202 }
3203
3204
3205
3206 static void create_declaration_entity(declaration_t *declaration,
3207                                       declaration_kind_t declaration_kind,
3208                                       ir_type *parent_type)
3209 {
3210         type_t    *const type   = skip_typeref(declaration->type);
3211         if (is_type_function(type)) {
3212                 (void) get_function_entity(declaration);
3213                 return;
3214         }
3215
3216         ident     *const id     = new_id_from_str(declaration->symbol->string);
3217         ir_type   *const irtype = get_ir_type(type);
3218         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3219         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3220
3221         declaration->declaration_kind = (unsigned char) declaration_kind;
3222         declaration->v.entity         = entity;
3223         set_entity_variability(entity, variability_uninitialized);
3224         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3225         if (parent_type == get_tls_type())
3226                 set_entity_allocation(entity, allocation_automatic);
3227         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3228                 set_entity_allocation(entity, allocation_static);
3229
3230         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3231                 set_entity_volatility(entity, volatility_is_volatile);
3232         }
3233 }
3234
3235
3236 typedef struct type_path_entry_t type_path_entry_t;
3237 struct type_path_entry_t {
3238         type_t           *type;
3239         ir_initializer_t *initializer;
3240         size_t            index;
3241         declaration_t    *compound_entry;
3242 };
3243
3244 typedef struct type_path_t type_path_t;
3245 struct type_path_t {
3246         type_path_entry_t *path;
3247         type_t            *top_type;
3248         bool               invalid;
3249 };
3250
3251 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3252 {
3253         size_t len = ARR_LEN(path->path);
3254
3255         for(size_t i = 0; i < len; ++i) {
3256                 const type_path_entry_t *entry = & path->path[i];
3257
3258                 type_t *type = skip_typeref(entry->type);
3259                 if (is_type_compound(type)) {
3260                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3261                 } else if (is_type_array(type)) {
3262                         fprintf(stderr, "[%zd]", entry->index);
3263                 } else {
3264                         fprintf(stderr, "-INVALID-");
3265                 }
3266         }
3267         fprintf(stderr, "  (");
3268         print_type(path->top_type);
3269         fprintf(stderr, ")");
3270 }
3271
3272 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3273 {
3274         size_t len = ARR_LEN(path->path);
3275         assert(len > 0);
3276         return & path->path[len-1];
3277 }
3278
3279 static type_path_entry_t *append_to_type_path(type_path_t *path)
3280 {
3281         size_t len = ARR_LEN(path->path);
3282         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3283
3284         type_path_entry_t *result = & path->path[len];
3285         memset(result, 0, sizeof(result[0]));
3286         return result;
3287 }
3288
3289 static size_t get_compound_size(const compound_type_t *type)
3290 {
3291         declaration_t *declaration = type->declaration;
3292         declaration_t *member      = declaration->scope.declarations;
3293         size_t         size        = 0;
3294         for( ; member != NULL; member = member->next) {
3295                 ++size;
3296         }
3297         /* TODO: cache results? */
3298
3299         return size;
3300 }
3301
3302 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3303 {
3304         type_t *orig_top_type = path->top_type;
3305         type_t *top_type      = skip_typeref(orig_top_type);
3306
3307         assert(is_type_compound(top_type) || is_type_array(top_type));
3308
3309         if (ARR_LEN(path->path) == 0) {
3310                 return NULL;
3311         } else {
3312                 type_path_entry_t *top         = get_type_path_top(path);
3313                 ir_initializer_t  *initializer = top->initializer;
3314                 return get_initializer_compound_value(initializer, top->index);
3315         }
3316 }
3317
3318 static void descend_into_subtype(type_path_t *path)
3319 {
3320         type_t *orig_top_type = path->top_type;
3321         type_t *top_type      = skip_typeref(orig_top_type);
3322
3323         assert(is_type_compound(top_type) || is_type_array(top_type));
3324
3325         ir_initializer_t *initializer = get_initializer_entry(path);
3326
3327         type_path_entry_t *top = append_to_type_path(path);
3328         top->type              = top_type;
3329
3330         size_t len;
3331
3332         if (is_type_compound(top_type)) {
3333                 declaration_t *declaration = top_type->compound.declaration;
3334                 declaration_t *entry       = declaration->scope.declarations;
3335
3336                 top->compound_entry = entry;
3337                 top->index          = 0;
3338                 len                 = get_compound_size(&top_type->compound);
3339                 if (entry != NULL)
3340                         path->top_type = entry->type;
3341         } else {
3342                 assert(is_type_array(top_type));
3343                 assert(top_type->array.size > 0);
3344
3345                 top->index     = 0;
3346                 path->top_type = top_type->array.element_type;
3347                 len            = top_type->array.size;
3348         }
3349         if (initializer == NULL
3350                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3351                 initializer = create_initializer_compound(len);
3352                 /* we have to set the entry at the 2nd latest path entry... */
3353                 size_t path_len = ARR_LEN(path->path);
3354                 assert(path_len >= 1);
3355                 if (path_len > 1) {
3356                         type_path_entry_t *entry        = & path->path[path_len-2];
3357                         ir_initializer_t  *tinitializer = entry->initializer;
3358                         set_initializer_compound_value(tinitializer, entry->index,
3359                                                        initializer);
3360                 }
3361         }
3362         top->initializer = initializer;
3363 }
3364
3365 static void ascend_from_subtype(type_path_t *path)
3366 {
3367         type_path_entry_t *top = get_type_path_top(path);
3368
3369         path->top_type = top->type;
3370
3371         size_t len = ARR_LEN(path->path);
3372         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3373 }
3374
3375 static void walk_designator(type_path_t *path, const designator_t *designator)
3376 {
3377         /* designators start at current object type */
3378         ARR_RESIZE(type_path_entry_t, path->path, 1);
3379
3380         for( ; designator != NULL; designator = designator->next) {
3381                 type_path_entry_t *top         = get_type_path_top(path);
3382                 type_t            *orig_type   = top->type;
3383                 type_t            *type        = skip_typeref(orig_type);
3384
3385                 if (designator->symbol != NULL) {
3386                         assert(is_type_compound(type));
3387                         size_t    index  = 0;
3388                         symbol_t *symbol = designator->symbol;
3389
3390                         declaration_t *declaration = type->compound.declaration;
3391                         declaration_t *iter        = declaration->scope.declarations;
3392                         for( ; iter != NULL; iter = iter->next, ++index) {
3393                                 if (iter->symbol == symbol) {
3394                                         break;
3395                                 }
3396                         }
3397                         assert(iter != NULL);
3398
3399                         top->type           = orig_type;
3400                         top->compound_entry = iter;
3401                         top->index          = index;
3402                         orig_type           = iter->type;
3403                 } else {
3404                         expression_t *array_index = designator->array_index;
3405                         assert(designator->array_index != NULL);
3406                         assert(is_type_array(type));
3407                         assert(is_type_valid(array_index->base.type));
3408
3409                         long index = fold_constant(array_index);
3410                         assert(index >= 0);
3411 #ifndef NDEBUG
3412                         if (type->array.size_constant == 1) {
3413                                 long array_size = type->array.size;
3414                                 assert(index < array_size);
3415                         }
3416 #endif
3417
3418                         top->type  = orig_type;
3419                         top->index = (size_t) index;
3420                         orig_type  = type->array.element_type;
3421                 }
3422                 path->top_type = orig_type;
3423
3424                 if (designator->next != NULL) {
3425                         descend_into_subtype(path);
3426                 }
3427         }
3428
3429         path->invalid  = false;
3430 }
3431
3432 static void advance_current_object(type_path_t *path)
3433 {
3434         if (path->invalid) {
3435                 /* TODO: handle this... */
3436                 panic("invalid initializer in ast2firm (excessive elements)");
3437                 return;
3438         }
3439
3440         type_path_entry_t *top = get_type_path_top(path);
3441
3442         type_t *type = skip_typeref(top->type);
3443         if (is_type_union(type)) {
3444                 top->compound_entry = NULL;
3445         } else if (is_type_struct(type)) {
3446                 declaration_t *entry = top->compound_entry;
3447
3448                 top->index++;
3449                 entry               = entry->next;
3450                 top->compound_entry = entry;
3451                 if (entry != NULL) {
3452                         path->top_type = entry->type;
3453                         return;
3454                 }
3455         } else {
3456                 assert(is_type_array(type));
3457
3458                 top->index++;
3459                 if (!type->array.size_constant || top->index < type->array.size) {
3460                         return;
3461                 }
3462         }
3463
3464         /* we're past the last member of the current sub-aggregate, try if we
3465          * can ascend in the type hierarchy and continue with another subobject */
3466         size_t len = ARR_LEN(path->path);
3467
3468         if (len > 1) {
3469                 ascend_from_subtype(path);
3470                 advance_current_object(path);
3471         } else {
3472                 path->invalid = true;
3473         }
3474 }
3475
3476
3477 static ir_initializer_t *create_ir_initializer(
3478                 const initializer_t *initializer, type_t *type);
3479
3480 static ir_initializer_t *create_ir_initializer_value(
3481                 const initializer_value_t *initializer)
3482 {
3483         if (is_type_compound(initializer->value->base.type)) {
3484                 panic("initializer creation for compounds not implemented yet");
3485         }
3486         ir_node *value = expression_to_firm(initializer->value);
3487         return create_initializer_const(value);
3488 }
3489
3490 static ir_initializer_t *create_ir_initializer_list(
3491                 const initializer_list_t *initializer, type_t *type)
3492 {
3493         type_path_t path;
3494         memset(&path, 0, sizeof(path));
3495         path.top_type = type;
3496         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3497
3498         descend_into_subtype(&path);
3499
3500         for(size_t i = 0; i < initializer->len; ++i) {
3501                 const initializer_t *sub_initializer = initializer->initializers[i];
3502
3503                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3504                         walk_designator(&path, sub_initializer->designator.designator);
3505                         continue;
3506                 }
3507
3508                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3509                         /* we might have to descend into types until we're at a scalar
3510                          * type */
3511                         while(true) {
3512                                 type_t *orig_top_type = path.top_type;
3513                                 type_t *top_type      = skip_typeref(orig_top_type);
3514
3515                                 if (is_type_scalar(top_type))
3516                                         break;
3517                                 descend_into_subtype(&path);
3518                         }
3519                 }
3520
3521                 ir_initializer_t *sub_irinitializer
3522                         = create_ir_initializer(sub_initializer, path.top_type);
3523
3524                 size_t path_len = ARR_LEN(path.path);
3525                 assert(path_len >= 1);
3526                 type_path_entry_t *entry        = & path.path[path_len-1];
3527                 ir_initializer_t  *tinitializer = entry->initializer;
3528                 set_initializer_compound_value(tinitializer, entry->index,
3529                                                sub_irinitializer);
3530
3531                 advance_current_object(&path);
3532         }
3533
3534         assert(ARR_LEN(path.path) >= 1);
3535         ir_initializer_t *result = path.path[0].initializer;
3536         DEL_ARR_F(path.path);
3537
3538         return result;
3539 }
3540
3541 static ir_initializer_t *create_ir_initializer_string(
3542                 const initializer_string_t *initializer, type_t *type)
3543 {
3544         type = skip_typeref(type);
3545
3546         size_t            string_len    = initializer->string.size;
3547         assert(type->kind == TYPE_ARRAY);
3548         assert(type->array.size_constant);
3549         size_t            len           = type->array.size;
3550         ir_initializer_t *irinitializer = create_initializer_compound(len);
3551
3552         const char *string = initializer->string.begin;
3553         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3554
3555         for(size_t i = 0; i < len; ++i) {
3556                 char c = 0;
3557                 if (i < string_len)
3558                         c = string[i];
3559
3560                 tarval           *tv = new_tarval_from_long(c, mode);
3561                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3562
3563                 set_initializer_compound_value(irinitializer, i, char_initializer);
3564         }
3565
3566         return irinitializer;
3567 }
3568
3569 static ir_initializer_t *create_ir_initializer_wide_string(
3570                 const initializer_wide_string_t *initializer, type_t *type)
3571 {
3572         size_t            string_len    = initializer->string.size;
3573         assert(type->kind == TYPE_ARRAY);
3574         assert(type->array.size_constant);
3575         size_t            len           = type->array.size;
3576         ir_initializer_t *irinitializer = create_initializer_compound(len);
3577
3578         const wchar_rep_t *string = initializer->string.begin;
3579         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3580
3581         for(size_t i = 0; i < len; ++i) {
3582                 wchar_rep_t c = 0;
3583                 if (i < string_len) {
3584                         c = string[i];
3585                 }
3586                 tarval *tv = new_tarval_from_long(c, mode);
3587                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3588
3589                 set_initializer_compound_value(irinitializer, i, char_initializer);
3590         }
3591
3592         return irinitializer;
3593 }
3594
3595 static ir_initializer_t *create_ir_initializer(
3596                 const initializer_t *initializer, type_t *type)
3597 {
3598         switch(initializer->kind) {
3599                 case INITIALIZER_STRING:
3600                         return create_ir_initializer_string(&initializer->string, type);
3601
3602                 case INITIALIZER_WIDE_STRING:
3603                         return create_ir_initializer_wide_string(&initializer->wide_string,
3604                                                                  type);
3605
3606                 case INITIALIZER_LIST:
3607                         return create_ir_initializer_list(&initializer->list, type);
3608
3609                 case INITIALIZER_VALUE:
3610                         return create_ir_initializer_value(&initializer->value);
3611
3612                 case INITIALIZER_DESIGNATOR:
3613                         panic("unexpected designator initializer found");
3614         }
3615         panic("unknown initializer");
3616 }
3617
3618 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3619                 ir_node *base_addr)
3620 {
3621         if (is_atomic_type(type)) {
3622                 ir_mode *mode = get_type_mode(type);
3623                 tarval  *zero = get_mode_null(mode);
3624                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3625
3626                 /* TODO: bitfields */
3627                 ir_node *mem    = get_store();
3628                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3629                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3630                 set_store(proj_m);
3631         } else {
3632                 assert(is_compound_type(type));
3633
3634                 int n_members;
3635                 if (is_Array_type(type)) {
3636                         assert(has_array_upper_bound(type, 0));
3637                         n_members = get_array_upper_bound_int(type, 0);
3638                 } else {
3639                         n_members = get_compound_n_members(type);
3640                 }
3641
3642                 for(int i = 0; i < n_members; ++i) {
3643                         ir_node *addr;
3644                         ir_type *irtype;
3645                         if (is_Array_type(type)) {
3646                                 ir_entity *entity   = get_array_element_entity(type);
3647                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3648                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3649                                 ir_node   *in[1]    = { cnst };
3650                                 irtype = get_array_element_type(type);
3651                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3652                         } else {
3653                                 ir_entity *member = get_compound_member(type, i);
3654
3655                                 irtype = get_entity_type(member);
3656                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3657                         }
3658
3659                         create_dynamic_null_initializer(irtype, dbgi, addr);
3660                 }
3661         }
3662 }
3663
3664 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3665                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3666 {
3667         switch(get_initializer_kind(initializer)) {
3668         case IR_INITIALIZER_NULL: {
3669                 create_dynamic_null_initializer(type, dbgi, base_addr);
3670                 return;
3671         }
3672         case IR_INITIALIZER_CONST: {
3673                 ir_node *node = get_initializer_const_value(initializer);
3674                 ir_mode *mode = get_irn_mode(node);
3675                 assert(get_type_mode(type) == mode);
3676
3677                 /* TODO: bitfields... */
3678                 ir_node *mem    = get_store();
3679                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3680                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3681                 set_store(proj_m);
3682                 return;
3683         }
3684         case IR_INITIALIZER_TARVAL: {
3685                 tarval  *tv   = get_initializer_tarval_value(initializer);
3686                 ir_mode *mode = get_tarval_mode(tv);
3687                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3688                 assert(get_type_mode(type) == mode);
3689
3690                 /* TODO: bitfields... */
3691                 ir_node *mem    = get_store();
3692                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3693                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3694                 set_store(proj_m);
3695                 return;
3696         }
3697         case IR_INITIALIZER_COMPOUND: {
3698                 assert(is_compound_type(type));
3699                 int n_members;
3700                 if (is_Array_type(type)) {
3701                         assert(has_array_upper_bound(type, 0));
3702                         n_members = get_array_upper_bound_int(type, 0);
3703                 } else {
3704                         n_members = get_compound_n_members(type);
3705                 }
3706
3707                 if (get_initializer_compound_n_entries(initializer)
3708                                 != (unsigned) n_members)
3709                         panic("initializer doesn't match compound type");
3710
3711                 for(int i = 0; i < n_members; ++i) {
3712                         ir_node *addr;
3713                         ir_type *irtype;
3714                         if (is_Array_type(type)) {
3715                                 ir_entity *entity   = get_array_element_entity(type);
3716                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3717                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3718                                 ir_node   *in[1]    = { cnst };
3719                                 irtype = get_array_element_type(type);
3720                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3721                         } else {
3722                                 ir_entity *member = get_compound_member(type, i);
3723
3724                                 irtype = get_entity_type(member);
3725                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3726                         }
3727
3728                         ir_initializer_t *sub_init
3729                                 = get_initializer_compound_value(initializer, i);
3730
3731                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3732                 }
3733                 return;
3734         }
3735         }
3736
3737         panic("invalid IR_INITIALIZER found");
3738 }
3739
3740 static void create_dynamic_initializer(ir_initializer_t *initializer,
3741                 dbg_info *dbgi, ir_entity *entity)
3742 {
3743         ir_node *frame     = get_local_frame(entity);
3744         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3745         ir_type *type      = get_entity_type(entity);
3746
3747         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3748 }
3749
3750 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3751                                      ir_entity *entity, type_t *type)
3752 {
3753         ir_node *memory = get_store();
3754         ir_node *nomem  = new_NoMem();
3755         ir_node *frame  = get_irg_frame(current_ir_graph);
3756         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3757
3758         if (initializer->kind == INITIALIZER_VALUE) {
3759                 initializer_value_t *initializer_value = &initializer->value;
3760
3761                 ir_node *value = expression_to_firm(initializer_value->value);
3762                 type = skip_typeref(type);
3763                 assign_value(dbgi, addr, type, value);
3764                 return;
3765         }
3766
3767         if (!is_constant_initializer(initializer)) {
3768                 ir_initializer_t *irinitializer
3769                         = create_ir_initializer(initializer, type);
3770
3771                 create_dynamic_initializer(irinitializer, dbgi, entity);
3772                 return;
3773         }
3774
3775         /* create the ir_initializer */
3776         ir_graph *const old_current_ir_graph = current_ir_graph;
3777         current_ir_graph = get_const_code_irg();
3778
3779         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3780
3781         assert(current_ir_graph == get_const_code_irg());
3782         current_ir_graph = old_current_ir_graph;
3783
3784         /* create a "template" entity which is copied to the entity on the stack */
3785         ident     *const id          = id_unique("initializer.%u");
3786         ir_type   *const irtype      = get_ir_type(type);
3787         ir_type   *const global_type = get_glob_type();
3788         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3789         set_entity_ld_ident(init_entity, id);
3790
3791         set_entity_variability(init_entity, variability_initialized);
3792         set_entity_visibility(init_entity, visibility_local);
3793         set_entity_allocation(init_entity, allocation_static);
3794
3795         set_entity_initializer(init_entity, irinitializer);
3796
3797         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3798         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3799
3800         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3801         set_store(copyb_mem);
3802 }
3803
3804 static void create_initializer_local_variable_entity(declaration_t *declaration)
3805 {
3806         initializer_t *initializer = declaration->init.initializer;
3807         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3808         ir_entity     *entity      = declaration->v.entity;
3809         type_t        *type        = declaration->type;
3810         create_local_initializer(initializer, dbgi, entity, type);
3811 }
3812
3813 static void create_declaration_initializer(declaration_t *declaration)
3814 {
3815         initializer_t *initializer = declaration->init.initializer;
3816         if (initializer == NULL)
3817                 return;
3818
3819         declaration_kind_t declaration_kind
3820                 = (declaration_kind_t) declaration->declaration_kind;
3821         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3822                 create_initializer_local_variable_entity(declaration);
3823                 return;
3824         }
3825
3826         type_t *type = skip_typeref(declaration->type);
3827
3828         if (initializer->kind == INITIALIZER_VALUE) {
3829                 initializer_value_t *initializer_value = &initializer->value;
3830                 dbg_info            *dbgi
3831                         = get_dbg_info(&declaration->source_position);
3832
3833                 ir_node *value = expression_to_firm(initializer_value->value);
3834                 value = do_strict_conv(dbgi, value);
3835
3836                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3837                         set_value(declaration->v.value_number, value);
3838                 } else {
3839                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3840
3841                         ir_entity *entity = declaration->v.entity;
3842
3843                         if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3844                                 set_entity_variability(entity, variability_constant);
3845                         } else {
3846                                 set_entity_variability(entity, variability_initialized);
3847                         }
3848                         set_atomic_ent_value(entity, value);
3849                 }
3850         } else {
3851                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3852                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3853
3854                 ir_entity        *entity        = declaration->v.entity;
3855                 ir_initializer_t *irinitializer
3856                         = create_ir_initializer(initializer, type);
3857
3858                 if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3859                         set_entity_variability(entity, variability_constant);
3860                 } else {
3861                         set_entity_variability(entity, variability_initialized);
3862                 }
3863                 set_entity_initializer(entity, irinitializer);
3864         }
3865 }
3866
3867 static void create_variable_length_array(declaration_t *declaration)
3868 {
3869         /* initializers are not allowed for VLAs */
3870         assert(declaration->init.initializer == NULL);
3871
3872         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3873         declaration->v.vla_base       = NULL;
3874
3875         /* TODO: record VLA somewhere so we create the free node when we leave
3876          * it's scope */
3877 }
3878
3879 static void allocate_variable_length_array(declaration_t *declaration)
3880 {
3881         /* initializers are not allowed for VLAs */
3882         assert(declaration->init.initializer == NULL);
3883         assert(get_cur_block() != NULL);
3884
3885         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3886         type_t   *type      = declaration->type;
3887         ir_type  *el_type   = get_ir_type(type->array.element_type);
3888
3889         /* make sure size_node is calculated */
3890         get_type_size(type);
3891         ir_node  *elems = type->array.size_node;
3892         ir_node  *mem   = get_store();
3893         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3894
3895         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3896         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3897         set_store(proj_m);
3898
3899         assert(declaration->declaration_kind
3900                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3901         declaration->v.vla_base       = addr;
3902 }
3903
3904 /**
3905  * Creates a Firm local variable from a declaration.
3906  */
3907 static void create_local_variable(declaration_t *declaration)
3908 {
3909         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3910
3911         bool needs_entity = declaration->address_taken;
3912         type_t *type = skip_typeref(declaration->type);
3913
3914         /* is it a variable length array? */
3915         if (is_type_array(type) && !type->array.size_constant) {
3916                 create_variable_length_array(declaration);
3917                 return;
3918         } else if (is_type_array(type) || is_type_compound(type)) {
3919                 needs_entity = true;
3920         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3921                 needs_entity = true;
3922         }
3923
3924         if (needs_entity) {
3925                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3926                 create_declaration_entity(declaration,
3927                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3928                                           frame_type);
3929         } else {
3930                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3931                 declaration->v.value_number   = next_value_number_function;
3932                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3933                 ++next_value_number_function;
3934         }
3935 }
3936
3937 static void create_local_static_variable(declaration_t *declaration)
3938 {
3939         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3940
3941         type_t    *const type        = skip_typeref(declaration->type);
3942         ir_type   *const global_type = get_glob_type();
3943         ir_type   *const irtype      = get_ir_type(type);
3944         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3945
3946         size_t l = strlen(declaration->symbol->string);
3947         char   buf[l + sizeof(".%u")];
3948         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3949         ident     *const id = id_unique(buf);
3950
3951         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3952
3953         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3954                 set_entity_volatility(entity, volatility_is_volatile);
3955         }
3956
3957         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3958         declaration->v.entity         = entity;
3959         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3960         set_entity_variability(entity, variability_uninitialized);
3961         set_entity_visibility(entity, visibility_local);
3962         set_entity_allocation(entity, allocation_static);
3963
3964         ir_graph *const old_current_ir_graph = current_ir_graph;
3965         current_ir_graph = get_const_code_irg();
3966
3967         create_declaration_initializer(declaration);
3968
3969         assert(current_ir_graph == get_const_code_irg());
3970         current_ir_graph = old_current_ir_graph;
3971 }
3972
3973
3974
3975 static void return_statement_to_firm(return_statement_t *statement)
3976 {
3977         if (get_cur_block() == NULL)
3978                 return;
3979
3980         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3981         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3982
3983
3984         ir_node *in[1];
3985         int      in_len;
3986         if (get_method_n_ress(func_irtype) > 0) {
3987                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3988
3989                 if (statement->value != NULL) {
3990                         ir_node *node = expression_to_firm(statement->value);
3991                         node  = do_strict_conv(dbgi, node);
3992                         in[0] = node;
3993                 } else {
3994                         ir_mode *mode;
3995                         if (is_compound_type(res_type)) {
3996                                 mode = mode_P_data;
3997                         } else {
3998                                 mode = get_type_mode(res_type);
3999                         }
4000                         in[0] = new_Unknown(mode);
4001                 }
4002                 in_len = 1;
4003         } else {
4004                 /* build return_value for its side effects */
4005                 if (statement->value != NULL) {
4006                         expression_to_firm(statement->value);
4007                 }
4008                 in_len = 0;
4009         }
4010
4011         ir_node  *store = get_store();
4012         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4013
4014         ir_node *end_block = get_irg_end_block(current_ir_graph);
4015         add_immBlock_pred(end_block, ret);
4016
4017         set_cur_block(NULL);
4018 }
4019
4020 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4021 {
4022         if (get_cur_block() == NULL)
4023                 return NULL;
4024
4025         return expression_to_firm(statement->expression);
4026 }
4027
4028 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4029 {
4030         declaration_t *declaration = compound->scope.declarations;
4031         for( ; declaration != NULL; declaration = declaration->next) {
4032                 create_local_declaration(declaration);
4033         }
4034
4035         ir_node     *result    = NULL;
4036         statement_t *statement = compound->statements;
4037         for( ; statement != NULL; statement = statement->base.next) {
4038                 if (statement->base.next == NULL
4039                                 && statement->kind == STATEMENT_EXPRESSION) {
4040                         result = expression_statement_to_firm(
4041                                         &statement->expression);
4042                         break;
4043                 }
4044                 statement_to_firm(statement);
4045         }
4046
4047         return result;
4048 }
4049
4050 static void create_global_variable(declaration_t *declaration)
4051 {
4052         ir_visibility  vis;
4053         ir_type       *var_type;
4054         switch ((storage_class_tag_t)declaration->storage_class) {
4055                 case STORAGE_CLASS_STATIC:
4056                         vis = visibility_local;
4057                         goto global_var;
4058
4059                 case STORAGE_CLASS_EXTERN:
4060                         vis = visibility_external_allocated;
4061                         goto global_var;
4062
4063                 case STORAGE_CLASS_NONE:
4064                         vis = visibility_external_visible;
4065                         goto global_var;
4066
4067                 case STORAGE_CLASS_THREAD:
4068                         vis = visibility_external_visible;
4069                         goto tls_var;
4070
4071                 case STORAGE_CLASS_THREAD_EXTERN:
4072                         vis = visibility_external_allocated;
4073                         goto tls_var;
4074
4075                 case STORAGE_CLASS_THREAD_STATIC:
4076                         vis = visibility_local;
4077                         goto tls_var;
4078
4079 tls_var:
4080                         var_type = get_tls_type();
4081                         goto create_var;
4082
4083 global_var:
4084                         var_type = get_glob_type();
4085                         goto create_var;
4086
4087 create_var:
4088                         create_declaration_entity(declaration,
4089                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
4090                                                   var_type);
4091                         if (!is_type_function(skip_typeref(declaration->type))) {
4092                                 set_entity_visibility(declaration->v.entity, vis);
4093                         }
4094
4095                         return;
4096
4097                 case STORAGE_CLASS_TYPEDEF:
4098                 case STORAGE_CLASS_AUTO:
4099                 case STORAGE_CLASS_REGISTER:
4100                 case STORAGE_CLASS_ENUM_ENTRY:
4101                         break;
4102         }
4103         panic("Invalid storage class for global variable");
4104 }
4105
4106 static void create_local_declaration(declaration_t *declaration)
4107 {
4108         if (declaration->namespc != NAMESPACE_NORMAL)
4109                 return;
4110         /* construct type */
4111         (void) get_ir_type(declaration->type);
4112         if (declaration->symbol == NULL) {
4113                 return;
4114         }
4115
4116         type_t *type = skip_typeref(declaration->type);
4117
4118         switch ((storage_class_tag_t) declaration->storage_class) {
4119         case STORAGE_CLASS_STATIC:
4120                 create_local_static_variable(declaration);
4121                 return;
4122         case STORAGE_CLASS_EXTERN:
4123                 create_global_variable(declaration);
4124                 create_declaration_initializer(declaration);
4125                 return;
4126         case STORAGE_CLASS_NONE:
4127         case STORAGE_CLASS_AUTO:
4128         case STORAGE_CLASS_REGISTER:
4129                 if (is_type_function(type)) {
4130                         if (declaration->init.statement != NULL) {
4131                                 panic("nested functions not supported yet");
4132                         } else {
4133                                 get_function_entity(declaration);
4134                         }
4135                 } else {
4136                         create_local_variable(declaration);
4137                 }
4138                 return;
4139         case STORAGE_CLASS_ENUM_ENTRY:
4140                 /* should already be handled */
4141                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4142                 return;
4143         case STORAGE_CLASS_TYPEDEF:
4144                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4145                 return;
4146         case STORAGE_CLASS_THREAD:
4147         case STORAGE_CLASS_THREAD_EXTERN:
4148         case STORAGE_CLASS_THREAD_STATIC:
4149                 break;
4150         }
4151         panic("invalid storage class found");
4152 }
4153
4154 static void initialize_local_declaration(declaration_t *declaration)
4155 {
4156         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4157                 return;
4158
4159         switch ((declaration_kind_t) declaration->declaration_kind) {
4160         case DECLARATION_KIND_LOCAL_VARIABLE:
4161         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4162                 create_declaration_initializer(declaration);
4163                 return;
4164
4165         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4166                 allocate_variable_length_array(declaration);
4167                 return;
4168
4169         case DECLARATION_KIND_LABEL_BLOCK:
4170         case DECLARATION_KIND_COMPOUND_MEMBER:
4171         case DECLARATION_KIND_GLOBAL_VARIABLE:
4172         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4173         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4174         case DECLARATION_KIND_FUNCTION:
4175         case DECLARATION_KIND_TYPE:
4176         case DECLARATION_KIND_ENUM_ENTRY:
4177                 return;
4178
4179         case DECLARATION_KIND_UNKNOWN:
4180                 panic("can't initialize unknwon declaration");
4181         }
4182         panic("invalid declaration kind");
4183 }
4184
4185 static void declaration_statement_to_firm(declaration_statement_t *statement)
4186 {
4187         declaration_t *declaration = statement->declarations_begin;
4188         declaration_t *end         = statement->declarations_end->next;
4189         for( ; declaration != end; declaration = declaration->next) {
4190                 if (declaration->namespc != NAMESPACE_NORMAL)
4191                         continue;
4192                 initialize_local_declaration(declaration);
4193         }
4194 }
4195
4196 static void if_statement_to_firm(if_statement_t *statement)
4197 {
4198         ir_node *cur_block = get_cur_block();
4199
4200         ir_node *fallthrough_block = NULL;
4201
4202         /* the true (blocks) */
4203         ir_node *true_block = NULL;
4204         if (statement->true_statement != NULL) {
4205                 true_block = new_immBlock();
4206                 statement_to_firm(statement->true_statement);
4207                 if (get_cur_block() != NULL) {
4208                         ir_node *jmp = new_Jmp();
4209                         if (fallthrough_block == NULL)
4210                                 fallthrough_block = new_immBlock();
4211                         add_immBlock_pred(fallthrough_block, jmp);
4212                 }
4213         }
4214
4215         /* the false (blocks) */
4216         ir_node *false_block = NULL;
4217         if (statement->false_statement != NULL) {
4218                 false_block = new_immBlock();
4219
4220                 statement_to_firm(statement->false_statement);
4221                 if (get_cur_block() != NULL) {
4222                         ir_node *jmp = new_Jmp();
4223                         if (fallthrough_block == NULL)
4224                                 fallthrough_block = new_immBlock();
4225                         add_immBlock_pred(fallthrough_block, jmp);
4226                 }
4227         }
4228
4229         /* create the condition */
4230         if (cur_block != NULL) {
4231                 if (true_block == NULL || false_block == NULL) {
4232                         if (fallthrough_block == NULL)
4233                                 fallthrough_block = new_immBlock();
4234                         if (true_block == NULL)
4235                                 true_block = fallthrough_block;
4236                         if (false_block == NULL)
4237                                 false_block = fallthrough_block;
4238                 }
4239
4240                 set_cur_block(cur_block);
4241                 create_condition_evaluation(statement->condition, true_block,
4242                                             false_block);
4243         }
4244
4245         mature_immBlock(true_block);
4246         if (false_block != fallthrough_block && false_block != NULL) {
4247                 mature_immBlock(false_block);
4248         }
4249         if (fallthrough_block != NULL) {
4250                 mature_immBlock(fallthrough_block);
4251         }
4252
4253         set_cur_block(fallthrough_block);
4254 }
4255
4256 static void while_statement_to_firm(while_statement_t *statement)
4257 {
4258         ir_node *jmp = NULL;
4259         if (get_cur_block() != NULL) {
4260                 jmp = new_Jmp();
4261         }
4262
4263         /* create the header block */
4264         ir_node *header_block = new_immBlock();
4265         if (jmp != NULL) {
4266                 add_immBlock_pred(header_block, jmp);
4267         }
4268
4269         /* the loop body */
4270         ir_node *old_continue_label = continue_label;
4271         ir_node *old_break_label    = break_label;
4272         continue_label              = header_block;
4273         break_label                 = NULL;
4274
4275         ir_node *body_block = new_immBlock();
4276         statement_to_firm(statement->body);
4277         ir_node *false_block = break_label;
4278
4279         assert(continue_label == header_block);
4280         continue_label = old_continue_label;
4281         break_label    = old_break_label;
4282
4283         if (get_cur_block() != NULL) {
4284                 jmp = new_Jmp();
4285                 add_immBlock_pred(header_block, jmp);
4286         }
4287
4288         /* shortcut for while(true) */
4289         if (is_constant_expression(statement->condition)
4290                         && fold_constant(statement->condition) != 0) {
4291                 set_cur_block(header_block);
4292                 ir_node *header_jmp = new_Jmp();
4293                 add_immBlock_pred(body_block, header_jmp);
4294
4295                 keep_alive(body_block);
4296                 keep_all_memory(body_block);
4297                 set_cur_block(body_block);
4298         } else {
4299                 if (false_block == NULL) {
4300                         false_block = new_immBlock();
4301                 }
4302
4303                 /* create the condition */
4304                 set_cur_block(header_block);
4305
4306                 create_condition_evaluation(statement->condition, body_block,
4307                                             false_block);
4308         }
4309
4310         mature_immBlock(body_block);
4311         mature_immBlock(header_block);
4312         if (false_block != NULL) {
4313                 mature_immBlock(false_block);
4314         }
4315
4316         set_cur_block(false_block);
4317 }
4318
4319 static void do_while_statement_to_firm(do_while_statement_t *statement)
4320 {
4321         ir_node *jmp = NULL;
4322         if (get_cur_block() != NULL) {
4323                 jmp = new_Jmp();
4324         }
4325
4326         /* create the header block */
4327         ir_node *header_block = new_immBlock();
4328
4329         /* the loop body */
4330         ir_node *body_block = new_immBlock();
4331         if (jmp != NULL) {
4332                 add_immBlock_pred(body_block, jmp);
4333         }
4334
4335         ir_node *old_continue_label = continue_label;
4336         ir_node *old_break_label    = break_label;
4337         continue_label              = header_block;
4338         break_label                 = NULL;
4339
4340         statement_to_firm(statement->body);
4341         ir_node *false_block = break_label;
4342
4343         assert(continue_label == header_block);
4344         continue_label = old_continue_label;
4345         break_label    = old_break_label;
4346
4347         if (get_cur_block() != NULL) {
4348                 ir_node *body_jmp = new_Jmp();
4349                 add_immBlock_pred(header_block, body_jmp);
4350                 mature_immBlock(header_block);
4351         }
4352
4353         if (false_block == NULL) {
4354                 false_block = new_immBlock();
4355         }
4356
4357         /* create the condition */
4358         set_cur_block(header_block);
4359
4360         create_condition_evaluation(statement->condition, body_block, false_block);
4361         mature_immBlock(body_block);
4362         mature_immBlock(header_block);
4363         if (false_block != NULL) {
4364                 mature_immBlock(false_block);
4365         }
4366
4367         set_cur_block(false_block);
4368 }
4369
4370 static void for_statement_to_firm(for_statement_t *statement)
4371 {
4372         ir_node *jmp = NULL;
4373
4374         /* create declarations */
4375         declaration_t *declaration = statement->scope.declarations;
4376         for( ; declaration != NULL; declaration = declaration->next) {
4377                 create_local_declaration(declaration);
4378         }
4379         declaration = statement->scope.declarations;
4380         for( ; declaration != NULL; declaration = declaration->next) {
4381                 initialize_local_declaration(declaration);
4382         }
4383
4384         if (get_cur_block() != NULL) {
4385                 if (statement->initialisation != NULL) {
4386                         expression_to_firm(statement->initialisation);
4387                 }
4388
4389                 jmp = new_Jmp();
4390         }
4391
4392
4393         /* create the step block */
4394         ir_node *const step_block = new_immBlock();
4395         if (statement->step != NULL) {
4396                 expression_to_firm(statement->step);
4397         }
4398         ir_node *const step_jmp = new_Jmp();
4399
4400         /* create the header block */
4401         ir_node *const header_block = new_immBlock();
4402         if (jmp != NULL) {
4403                 add_immBlock_pred(header_block, jmp);
4404         }
4405         add_immBlock_pred(header_block, step_jmp);
4406
4407         /* the false block */
4408         ir_node *const false_block = new_immBlock();
4409
4410         /* the loop body */
4411         ir_node * body_block;
4412         if (statement->body != NULL) {
4413                 ir_node *const old_continue_label = continue_label;
4414                 ir_node *const old_break_label    = break_label;
4415                 continue_label = step_block;
4416                 break_label    = false_block;
4417
4418                 body_block = new_immBlock();
4419                 statement_to_firm(statement->body);
4420
4421                 assert(continue_label == step_block);
4422                 assert(break_label    == false_block);
4423                 continue_label = old_continue_label;
4424                 break_label    = old_break_label;
4425
4426                 if (get_cur_block() != NULL) {
4427                         jmp = new_Jmp();
4428                         add_immBlock_pred(step_block, jmp);
4429                 }
4430         } else {
4431                 body_block = step_block;
4432         }
4433
4434         /* create the condition */
4435         set_cur_block(header_block);
4436         if (statement->condition != NULL) {
4437                 create_condition_evaluation(statement->condition, body_block,
4438                                             false_block);
4439         } else {
4440                 keep_alive(header_block);
4441                 keep_all_memory(header_block);
4442                 jmp = new_Jmp();
4443                 add_immBlock_pred(body_block, jmp);
4444         }
4445
4446         mature_immBlock(body_block);
4447         mature_immBlock(false_block);
4448         mature_immBlock(step_block);
4449         mature_immBlock(header_block);
4450         mature_immBlock(false_block);
4451
4452         set_cur_block(false_block);
4453 }
4454
4455 static void create_jump_statement(const statement_t *statement,
4456                                   ir_node *target_block)
4457 {
4458         if (get_cur_block() == NULL)
4459                 return;
4460
4461         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4462         ir_node  *jump = new_d_Jmp(dbgi);
4463         add_immBlock_pred(target_block, jump);
4464
4465         set_cur_block(NULL);
4466 }
4467
4468 static ir_node *get_break_label(void)
4469 {
4470         if (break_label == NULL) {
4471                 ir_node *cur_block = get_cur_block();
4472                 break_label = new_immBlock();
4473                 set_cur_block(cur_block);
4474         }
4475         return break_label;
4476 }
4477
4478 static void switch_statement_to_firm(switch_statement_t *statement)
4479 {
4480         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4481
4482         ir_node *expression  = expression_to_firm(statement->expression);
4483         ir_node *cond        = new_d_Cond(dbgi, expression);
4484
4485         set_cur_block(NULL);
4486
4487         ir_node *const old_switch_cond       = current_switch_cond;
4488         ir_node *const old_break_label       = break_label;
4489         const bool     old_saw_default_label = saw_default_label;
4490         saw_default_label                    = false;
4491         current_switch_cond                  = cond;
4492         break_label                          = NULL;
4493         switch_statement_t *const old_switch = current_switch;
4494         current_switch                       = statement;
4495
4496         /* determine a free number for the default label */
4497         unsigned long num_cases = 0;
4498         long def_nr = 0;
4499         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4500                 if (l->expression == NULL) {
4501                         /* default case */
4502                         continue;
4503                 }
4504                 if (l->last_case >= l->first_case)
4505                         num_cases += l->last_case - l->first_case;
4506                 if (l->last_case > def_nr)
4507                         def_nr = l->last_case;
4508         }
4509
4510         if (def_nr + 1 < 0) {
4511                 /* Bad: an overflow occurred, we cannot be sure that the
4512          * maximum + 1 is a free number. Scan the values a second
4513          * time to find a free number.
4514          */
4515                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4516                 unsigned long i;
4517
4518                 memset(bits, 0, (num_cases + 7) >> 3);
4519                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4520                         if (l->expression == NULL) {
4521                                 /* default case */
4522                                 continue;
4523                         }
4524                         for (long cns = l->first_case; cns <= l->last_case; ++cns) {
4525                                 if (cns >= 0 && (unsigned long)cns < num_cases)
4526                                         bits[cns >> 3] |= (1 << (cns & 7));
4527                         }
4528                 }
4529                 /* We look at the first num_cases constants:
4530                  * Either they are densed, so we took the last (num_cases)
4531                  * one, or they are non densed, so we will find one free
4532                  * there...
4533                  */
4534                 for (i = 0; i < num_cases; ++i)
4535                         if ((bits[i >> 3] & (i & 7)) == 0)
4536                                 break;
4537
4538                 free(bits);
4539                 def_nr = i;
4540         } else {
4541                 ++def_nr;
4542         }
4543         statement->default_proj_nr = def_nr;
4544
4545         if (statement->body != NULL) {
4546                 statement_to_firm(statement->body);
4547         }
4548
4549         if (get_cur_block() != NULL) {
4550                 ir_node *jmp = new_Jmp();
4551                 add_immBlock_pred(get_break_label(), jmp);
4552         }
4553
4554         if (!saw_default_label) {
4555                 set_cur_block(get_nodes_block(cond));
4556                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4557                                                         statement->default_proj_nr);
4558                 add_immBlock_pred(get_break_label(), proj);
4559         }
4560
4561         if (break_label != NULL) {
4562                 mature_immBlock(break_label);
4563         }
4564         set_cur_block(break_label);
4565
4566         assert(current_switch_cond == cond);
4567         current_switch      = old_switch;
4568         current_switch_cond = old_switch_cond;
4569         break_label         = old_break_label;
4570         saw_default_label   = old_saw_default_label;
4571 }
4572
4573 static void case_label_to_firm(const case_label_statement_t *statement)
4574 {
4575         if (statement->is_empty)
4576                 return;
4577
4578         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4579
4580         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4581
4582         ir_node *proj;
4583         ir_node *old_block = get_nodes_block(current_switch_cond);
4584         ir_node *block     = new_immBlock();
4585
4586         set_cur_block(old_block);
4587         if (statement->expression != NULL) {
4588                 long pn     = statement->first_case;
4589                 long end_pn = statement->last_case;
4590                 assert(pn <= end_pn);
4591                 /* create jumps for all cases in the given range */
4592                 do {
4593                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4594                         add_immBlock_pred(block, proj);
4595                 } while(pn++ < end_pn);
4596         } else {
4597                 saw_default_label = true;
4598                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4599                                          current_switch->default_proj_nr);
4600
4601                 add_immBlock_pred(block, proj);
4602         }
4603
4604         if (fallthrough != NULL) {
4605                 add_immBlock_pred(block, fallthrough);
4606         }
4607         mature_immBlock(block);
4608         set_cur_block(block);
4609
4610         if (statement->statement != NULL) {
4611                 statement_to_firm(statement->statement);
4612         }
4613 }
4614
4615 static void label_to_firm(const label_statement_t *statement)
4616 {
4617         ir_node *block = get_label_block(statement->label);
4618
4619         if (get_cur_block() != NULL) {
4620                 ir_node *jmp = new_Jmp();
4621                 add_immBlock_pred(block, jmp);
4622         }
4623
4624         set_cur_block(block);
4625         keep_alive(block);
4626         keep_all_memory(block);
4627
4628         if (statement->statement != NULL) {
4629                 statement_to_firm(statement->statement);
4630         }
4631 }
4632
4633 static void goto_to_firm(const goto_statement_t *statement)
4634 {
4635         if (get_cur_block() == NULL)
4636                 return;
4637
4638         if (statement->expression) {
4639                 ir_node  *irn  = expression_to_firm(statement->expression);
4640                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4641                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4642
4643                 set_irn_link(ijmp, ijmp_list);
4644                 ijmp_list = ijmp;
4645         } else {
4646                 ir_node *block = get_label_block(statement->label);
4647                 ir_node *jmp   = new_Jmp();
4648                 add_immBlock_pred(block, jmp);
4649         }
4650         set_cur_block(NULL);
4651 }
4652
4653 static void asm_statement_to_firm(const asm_statement_t *statement)
4654 {
4655         bool needs_memory = false;
4656
4657         if (statement->is_volatile) {
4658                 needs_memory = true;
4659         }
4660
4661         size_t         n_clobbers = 0;
4662         asm_clobber_t *clobber    = statement->clobbers;
4663         for( ; clobber != NULL; clobber = clobber->next) {
4664                 const char *clobber_str = clobber->clobber.begin;
4665
4666                 if (!be_is_valid_clobber(clobber_str)) {
4667                         errorf(&statement->base.source_position,
4668                                    "invalid clobber '%s' specified", clobber->clobber);
4669                         continue;
4670                 }
4671
4672                 if (strcmp(clobber_str, "memory") == 0) {
4673                         needs_memory = true;
4674                         continue;
4675                 }
4676
4677                 ident *id = new_id_from_str(clobber_str);
4678                 obstack_ptr_grow(&asm_obst, id);
4679                 ++n_clobbers;
4680         }
4681         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4682         ident **clobbers = NULL;
4683         if (n_clobbers > 0) {
4684                 clobbers = obstack_finish(&asm_obst);
4685         }
4686
4687         size_t n_inputs  = 0;
4688         asm_argument_t *argument = statement->inputs;
4689         for ( ; argument != NULL; argument = argument->next)
4690                 n_inputs++;
4691         size_t n_outputs = 0;
4692         argument = statement->outputs;
4693         for ( ; argument != NULL; argument = argument->next)
4694                 n_outputs++;
4695
4696         unsigned next_pos = 0;
4697
4698         ir_node *ins[n_inputs + n_outputs + 1];
4699         size_t   in_size = 0;
4700
4701         ir_asm_constraint tmp_in_constraints[n_outputs];
4702
4703         const expression_t *out_exprs[n_outputs];
4704         ir_node            *out_addrs[n_outputs];
4705         size_t              out_size = 0;
4706
4707         argument = statement->outputs;
4708         for ( ; argument != NULL; argument = argument->next) {
4709                 const char *constraints = argument->constraints.begin;
4710                 asm_constraint_flags_t asm_flags
4711                         = be_parse_asm_constraints(constraints);
4712
4713                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4714                         errorf(&statement->base.source_position,
4715                                "some constraints in '%s' are not supported", constraints);
4716                         continue;
4717                 }
4718                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4719                         errorf(&statement->base.source_position,
4720                                "some constraints in '%s' are invalid", constraints);
4721                         continue;
4722                 }
4723                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4724                         errorf(&statement->base.source_position,
4725                                "no write flag specified for output constraints '%s'",
4726                                constraints);
4727                         continue;
4728                 }
4729
4730                 unsigned pos = next_pos++;
4731                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4732                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4733                         expression_t *expr = argument->expression;
4734                         ir_node      *addr = expression_to_addr(expr);
4735                         /* in+output, construct an artifical same_as constraint on the
4736                          * input */
4737                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4738                                 char     buf[64];
4739                                 ir_node *value = get_value_from_lvalue(expr, addr);
4740
4741                                 snprintf(buf, sizeof(buf), "%d", pos);
4742
4743                                 ir_asm_constraint constraint;
4744                                 constraint.pos              = pos;
4745                                 constraint.constraint       = new_id_from_str(buf);
4746                                 constraint.mode             = get_ir_mode(expr->base.type);
4747                                 tmp_in_constraints[in_size] = constraint;
4748                                 ins[in_size] = value;
4749
4750                                 ++in_size;
4751                         }
4752
4753                         out_exprs[out_size] = expr;
4754                         out_addrs[out_size] = addr;
4755                         ++out_size;
4756                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4757                         /* pure memory ops need no input (but we have to make sure we
4758                          * attach to the memory) */
4759                         assert(! (asm_flags &
4760                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4761                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4762                         needs_memory = true;
4763
4764                         /* we need to attach the address to the inputs */
4765                         expression_t *expr = argument->expression;
4766
4767                         ir_asm_constraint constraint;
4768                         constraint.pos              = pos;
4769                         constraint.constraint       = new_id_from_str(constraints);
4770                         constraint.mode             = NULL;
4771                         tmp_in_constraints[in_size] = constraint;
4772
4773                         ins[in_size]          = expression_to_addr(expr);
4774                         ++in_size;
4775                         continue;
4776                 } else {
4777                         errorf(&statement->base.source_position,
4778                                "only modifiers but no place set in constraints '%s'",
4779                                constraints);
4780                         continue;
4781                 }
4782
4783                 ir_asm_constraint constraint;
4784                 constraint.pos        = pos;
4785                 constraint.constraint = new_id_from_str(constraints);
4786                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4787
4788                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4789         }
4790         assert(obstack_object_size(&asm_obst)
4791                         == out_size * sizeof(ir_asm_constraint));
4792         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4793
4794
4795         obstack_grow(&asm_obst, tmp_in_constraints,
4796                      in_size * sizeof(tmp_in_constraints[0]));
4797         /* find and count input and output arguments */
4798         argument = statement->inputs;
4799         for( ; argument != NULL; argument = argument->next) {
4800                 const char *constraints = argument->constraints.begin;
4801                 asm_constraint_flags_t asm_flags
4802                         = be_parse_asm_constraints(constraints);
4803
4804                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4805                         errorf(&statement->base.source_position,
4806                                "some constraints in '%s' are not supported", constraints);
4807                         continue;
4808                 }
4809                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4810                         errorf(&statement->base.source_position,
4811                                "some constraints in '%s' are invalid", constraints);
4812                         continue;
4813                 }
4814                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4815                         errorf(&statement->base.source_position,
4816                                "write flag specified for input constraints '%s'",
4817                                constraints);
4818                         continue;
4819                 }
4820
4821                 ir_node *input;
4822                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4823                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4824                         /* we can treat this as "normal" input */
4825                         input = expression_to_firm(argument->expression);
4826                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4827                         /* pure memory ops need no input (but we have to make sure we
4828                          * attach to the memory) */
4829                         assert(! (asm_flags &
4830                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4831                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4832                         needs_memory = true;
4833                         input = expression_to_addr(argument->expression);
4834                 } else {
4835                         errorf(&statement->base.source_position,
4836                                "only modifiers but no place set in constraints '%s'",
4837                                constraints);
4838                         continue;
4839                 }
4840
4841                 ir_asm_constraint constraint;
4842                 constraint.pos        = next_pos++;
4843                 constraint.constraint = new_id_from_str(constraints);
4844                 constraint.mode       = get_irn_mode(input);
4845
4846                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4847                 ins[in_size++] = input;
4848         }
4849
4850         if (needs_memory) {
4851                 ir_asm_constraint constraint;
4852                 constraint.pos        = next_pos++;
4853                 constraint.constraint = new_id_from_str("");
4854                 constraint.mode       = mode_M;
4855
4856                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4857                 ins[in_size++] = get_store();
4858         }
4859
4860         assert(obstack_object_size(&asm_obst)
4861                         == in_size * sizeof(ir_asm_constraint));
4862         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4863
4864         /* create asm node */
4865         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4866
4867         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4868
4869         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4870                                   out_size, output_constraints,
4871                                   n_clobbers, clobbers, asm_text);
4872
4873         if (statement->is_volatile) {
4874                 set_irn_pinned(node, op_pin_state_pinned);
4875         } else {
4876                 set_irn_pinned(node, op_pin_state_floats);
4877         }
4878
4879         /* create output projs & connect them */
4880         if (needs_memory) {
4881                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4882                 set_store(projm);
4883         }
4884
4885         size_t i;
4886         for (i = 0; i < out_size; ++i) {
4887                 const expression_t *out_expr = out_exprs[i];
4888                 long                pn       = i;
4889                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4890                 ir_node            *proj     = new_Proj(node, mode, pn);
4891                 ir_node            *addr     = out_addrs[i];
4892
4893                 set_value_for_expression_addr(out_expr, proj, addr);
4894         }
4895 }
4896
4897 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4898         statement_to_firm(statement->try_statement);
4899         warningf(&statement->base.source_position, "structured exception handling ignored");
4900 }
4901
4902 static void     leave_statement_to_firm(leave_statement_t *statement) {
4903         errorf(&statement->base.source_position, "__leave not supported yet");
4904 }
4905
4906 /**
4907  * Transform a statement.
4908  */
4909 static void statement_to_firm(statement_t *statement)
4910 {
4911 #ifndef NDEBUG
4912         assert(!statement->base.transformed);
4913         statement->base.transformed = true;
4914 #endif
4915
4916         switch(statement->kind) {
4917         case STATEMENT_INVALID:
4918                 panic("invalid statement found");
4919                 return;
4920         case STATEMENT_EMPTY:
4921                 /* nothing */
4922                 return;
4923         case STATEMENT_COMPOUND:
4924                 compound_statement_to_firm(&statement->compound);
4925                 return;
4926         case STATEMENT_RETURN:
4927                 return_statement_to_firm(&statement->returns);
4928                 return;
4929         case STATEMENT_EXPRESSION:
4930                 expression_statement_to_firm(&statement->expression);
4931                 return;
4932         case STATEMENT_IF:
4933                 if_statement_to_firm(&statement->ifs);
4934                 return;
4935         case STATEMENT_WHILE:
4936                 while_statement_to_firm(&statement->whiles);
4937                 return;
4938         case STATEMENT_DO_WHILE:
4939                 do_while_statement_to_firm(&statement->do_while);
4940                 return;
4941         case STATEMENT_DECLARATION:
4942                 declaration_statement_to_firm(&statement->declaration);
4943                 return;
4944         case STATEMENT_BREAK:
4945                 create_jump_statement(statement, get_break_label());
4946                 return;
4947         case STATEMENT_CONTINUE:
4948                 create_jump_statement(statement, continue_label);
4949                 return;
4950         case STATEMENT_SWITCH:
4951                 switch_statement_to_firm(&statement->switchs);
4952                 return;
4953         case STATEMENT_CASE_LABEL:
4954                 case_label_to_firm(&statement->case_label);
4955                 return;
4956         case STATEMENT_FOR:
4957                 for_statement_to_firm(&statement->fors);
4958                 return;
4959         case STATEMENT_LABEL:
4960                 label_to_firm(&statement->label);
4961                 return;
4962         case STATEMENT_GOTO:
4963                 goto_to_firm(&statement->gotos);
4964                 return;
4965         case STATEMENT_ASM:
4966                 asm_statement_to_firm(&statement->asms);
4967                 return;
4968         case STATEMENT_MS_TRY:
4969                 ms_try_statement_to_firm(&statement->ms_try);
4970                 return;
4971         case STATEMENT_LEAVE:
4972                 leave_statement_to_firm(&statement->leave);
4973                 return;
4974         }
4975         panic("Statement not implemented\n");
4976 }
4977
4978 static int count_decls_in_expression(const expression_t *expression);
4979
4980 static int count_local_declarations(const declaration_t *      decl,
4981                                     const declaration_t *const end)
4982 {
4983         int count = 0;
4984         for (; decl != end; decl = decl->next) {
4985                 if (decl->namespc != NAMESPACE_NORMAL)
4986                         continue;
4987                 type_t *type = skip_typeref(decl->type);
4988
4989                 if (!decl->address_taken && is_type_scalar(type))
4990                         ++count;
4991                 const initializer_t *initializer = decl->init.initializer;
4992                 /* FIXME: should walk initializer hierarchies... */
4993                 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4994                         count += count_decls_in_expression(initializer->value.value);
4995                 }
4996         }
4997         return count;
4998 }
4999
5000 static int count_decls_in_expression(const expression_t *expression) {
5001         int count = 0;
5002
5003         if (expression == NULL)
5004                 return 0;
5005
5006         switch((expression_kind_t) expression->base.kind) {
5007         case EXPR_STATEMENT:
5008                 return count_decls_in_stmts(expression->statement.statement);
5009         EXPR_BINARY_CASES {
5010                 int count_left  = count_decls_in_expression(expression->binary.left);
5011                 int count_right = count_decls_in_expression(expression->binary.right);
5012                 return count_left + count_right;
5013         }
5014         EXPR_UNARY_CASES
5015                 return count_decls_in_expression(expression->unary.value);
5016         case EXPR_CALL: {
5017                 call_argument_t *argument = expression->call.arguments;
5018                 for( ; argument != NULL; argument = argument->next) {
5019                         count += count_decls_in_expression(argument->expression);
5020                 }
5021                 return count;
5022         }
5023
5024         case EXPR_UNKNOWN:
5025         case EXPR_INVALID:
5026                 panic("unexpected expression kind");
5027
5028         case EXPR_COMPOUND_LITERAL:
5029                 /* TODO... */
5030                 break;
5031
5032         case EXPR_CONDITIONAL:
5033                 count += count_decls_in_expression(expression->conditional.condition);
5034                 count += count_decls_in_expression(expression->conditional.true_expression);
5035                 count += count_decls_in_expression(expression->conditional.false_expression);
5036                 return count;
5037
5038         case EXPR_BUILTIN_PREFETCH:
5039                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
5040                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
5041                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
5042                 return count;
5043
5044         case EXPR_BUILTIN_CONSTANT_P:
5045                 count += count_decls_in_expression(expression->builtin_constant.value);
5046                 return count;
5047
5048         case EXPR_SELECT:
5049                 count += count_decls_in_expression(expression->select.compound);
5050                 return count;
5051
5052         case EXPR_ARRAY_ACCESS:
5053                 count += count_decls_in_expression(expression->array_access.array_ref);
5054                 count += count_decls_in_expression(expression->array_access.index);
5055                 return count;
5056
5057         case EXPR_CLASSIFY_TYPE:
5058                 count += count_decls_in_expression(expression->classify_type.type_expression);
5059                 return count;
5060
5061         case EXPR_SIZEOF:
5062         case EXPR_ALIGNOF: {
5063                 expression_t *tp_expression = expression->typeprop.tp_expression;
5064                 if (tp_expression != NULL) {
5065                         count += count_decls_in_expression(tp_expression);
5066                 }
5067                 return count;
5068         }
5069
5070         case EXPR_OFFSETOF:
5071         case EXPR_REFERENCE:
5072         case EXPR_CONST:
5073         case EXPR_CHARACTER_CONSTANT:
5074         case EXPR_WIDE_CHARACTER_CONSTANT:
5075         case EXPR_STRING_LITERAL:
5076         case EXPR_WIDE_STRING_LITERAL:
5077         case EXPR_FUNCNAME:
5078         case EXPR_BUILTIN_SYMBOL:
5079         case EXPR_VA_START:
5080         case EXPR_VA_ARG:
5081         case EXPR_LABEL_ADDRESS:
5082                 break;
5083         }
5084
5085         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
5086          * (or implement all the missing expressions here/implement a walker)
5087          */
5088
5089         return 0;
5090 }
5091
5092 static int count_decls_in_stmts(const statement_t *stmt)
5093 {
5094         int count = 0;
5095         for (; stmt != NULL; stmt = stmt->base.next) {
5096                 switch (stmt->kind) {
5097                         case STATEMENT_EMPTY:
5098                                 break;
5099
5100                         case STATEMENT_DECLARATION: {
5101                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5102                                 count += count_local_declarations(decl_stmt->declarations_begin,
5103                                                                   decl_stmt->declarations_end->next);
5104                                 break;
5105                         }
5106
5107                         case STATEMENT_COMPOUND: {
5108                                 const compound_statement_t *const comp =
5109                                         &stmt->compound;
5110                                 count += count_decls_in_stmts(comp->statements);
5111                                 break;
5112                         }
5113
5114                         case STATEMENT_IF: {
5115                                 const if_statement_t *const if_stmt = &stmt->ifs;
5116                                 count += count_decls_in_expression(if_stmt->condition);
5117                                 count += count_decls_in_stmts(if_stmt->true_statement);
5118                                 count += count_decls_in_stmts(if_stmt->false_statement);
5119                                 break;
5120                         }
5121
5122                         case STATEMENT_SWITCH: {
5123                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
5124                                 count += count_decls_in_expression(switch_stmt->expression);
5125                                 count += count_decls_in_stmts(switch_stmt->body);
5126                                 break;
5127                         }
5128
5129                         case STATEMENT_LABEL: {
5130                                 const label_statement_t *const label_stmt = &stmt->label;
5131                                 if (label_stmt->statement != NULL) {
5132                                         count += count_decls_in_stmts(label_stmt->statement);
5133                                 }
5134                                 break;
5135                         }
5136
5137                         case STATEMENT_WHILE: {
5138                                 const while_statement_t *const while_stmt = &stmt->whiles;
5139                                 count += count_decls_in_expression(while_stmt->condition);
5140                                 count += count_decls_in_stmts(while_stmt->body);
5141                                 break;
5142                         }
5143
5144                         case STATEMENT_DO_WHILE: {
5145                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5146                                 count += count_decls_in_expression(do_while_stmt->condition);
5147                                 count += count_decls_in_stmts(do_while_stmt->body);
5148                                 break;
5149                         }
5150
5151                         case STATEMENT_FOR: {
5152                                 const for_statement_t *const for_stmt = &stmt->fors;
5153                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5154                                 count += count_decls_in_expression(for_stmt->initialisation);
5155                                 count += count_decls_in_expression(for_stmt->condition);
5156                                 count += count_decls_in_expression(for_stmt->step);
5157                                 count += count_decls_in_stmts(for_stmt->body);
5158                                 break;
5159                         }
5160
5161                         case STATEMENT_CASE_LABEL: {
5162                                 const case_label_statement_t *label = &stmt->case_label;
5163                                 count += count_decls_in_expression(label->expression);
5164                                 if (label->statement != NULL) {
5165                                         count += count_decls_in_stmts(label->statement);
5166                                 }
5167                                 break;
5168                         }
5169
5170                         case STATEMENT_ASM:
5171                         case STATEMENT_BREAK:
5172                         case STATEMENT_CONTINUE:
5173                                 break;
5174
5175                         case STATEMENT_EXPRESSION: {
5176                                 const expression_statement_t *expr_stmt = &stmt->expression;
5177                                 count += count_decls_in_expression(expr_stmt->expression);
5178                                 break;
5179                         }
5180
5181                         case STATEMENT_GOTO:
5182                         case STATEMENT_LEAVE:
5183                         case STATEMENT_INVALID:
5184                                 break;
5185
5186                         case STATEMENT_RETURN: {
5187                                 const return_statement_t *ret_stmt = &stmt->returns;
5188                                 count += count_decls_in_expression(ret_stmt->value);
5189                                 break;
5190                         }
5191
5192                         case STATEMENT_MS_TRY: {
5193                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5194                                 count += count_decls_in_stmts(try_stmt->try_statement);
5195                                 if (try_stmt->except_expression != NULL)
5196                                         count += count_decls_in_expression(try_stmt->except_expression);
5197                                 count += count_decls_in_stmts(try_stmt->final_statement);
5198                                 break;
5199                         }
5200                 }
5201         }
5202         return count;
5203 }
5204
5205 static int get_function_n_local_vars(declaration_t *declaration)
5206 {
5207         int count = 0;
5208
5209         /* count parameters */
5210         count += count_local_declarations(declaration->scope.declarations, NULL);
5211
5212         /* count local variables declared in body */
5213         count += count_decls_in_stmts(declaration->init.statement);
5214
5215         return count;
5216 }
5217
5218 static void initialize_function_parameters(declaration_t *declaration)
5219 {
5220         ir_graph        *irg             = current_ir_graph;
5221         ir_node         *args            = get_irg_args(irg);
5222         ir_node         *start_block     = get_irg_start_block(irg);
5223         ir_type         *function_irtype = get_ir_type(declaration->type);
5224
5225         int            n         = 0;
5226         declaration_t *parameter = declaration->scope.declarations;
5227         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5228                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5229                 type_t *type = skip_typeref(parameter->type);
5230
5231                 bool needs_entity = parameter->address_taken;
5232                 assert(!is_type_array(type));
5233                 if (is_type_compound(type)) {
5234                         needs_entity = true;
5235                 }
5236
5237                 if (needs_entity) {
5238                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5239                         ident     *id     = new_id_from_str(parameter->symbol->string);
5240                         set_entity_ident(entity, id);
5241
5242                         parameter->declaration_kind
5243                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5244                         parameter->v.entity = entity;
5245                         continue;
5246                 }
5247
5248                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5249                 ir_mode *param_mode   = get_type_mode(param_irtype);
5250
5251                 long     pn    = n;
5252                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5253
5254                 ir_mode *mode = get_ir_mode(type);
5255                 value = create_conv(NULL, value, mode);
5256                 value = do_strict_conv(NULL, value);
5257
5258                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5259                 parameter->v.value_number   = next_value_number_function;
5260                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5261                 ++next_value_number_function;
5262
5263                 set_value(parameter->v.value_number, value);
5264         }
5265 }
5266
5267 /**
5268  * Handle additional decl modifiers for IR-graphs
5269  *
5270  * @param irg            the IR-graph
5271  * @param dec_modifiers  additional modifiers
5272  */
5273 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5274 {
5275         if (decl_modifiers & DM_NORETURN) {
5276                 /* TRUE if the declaration includes the Microsoft
5277                    __declspec(noreturn) specifier. */
5278                 set_irg_additional_property(irg, mtp_property_noreturn);
5279         }
5280         if (decl_modifiers & DM_NOTHROW) {
5281                 /* TRUE if the declaration includes the Microsoft
5282                    __declspec(nothrow) specifier. */
5283                 set_irg_additional_property(irg, mtp_property_nothrow);
5284         }
5285         if (decl_modifiers & DM_NAKED) {
5286                 /* TRUE if the declaration includes the Microsoft
5287                    __declspec(naked) specifier. */
5288                 set_irg_additional_property(irg, mtp_property_naked);
5289         }
5290         if (decl_modifiers & DM_FORCEINLINE) {
5291                 /* TRUE if the declaration includes the
5292                    Microsoft __forceinline specifier. */
5293                 set_irg_inline_property(irg, irg_inline_forced);
5294         }
5295         if (decl_modifiers & DM_NOINLINE) {
5296                 /* TRUE if the declaration includes the Microsoft
5297                    __declspec(noinline) specifier. */
5298                 set_irg_inline_property(irg, irg_inline_forbidden);
5299         }
5300 }
5301
5302 static void add_function_pointer(ir_type *segment, ir_entity *method,
5303                                  const char *unique_template)
5304 {
5305         ir_type   *method_type  = get_entity_type(method);
5306         ident     *id           = id_unique(unique_template);
5307         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5308
5309         ident     *ide          = id_unique(unique_template);
5310         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5311         ir_graph  *irg          = get_const_code_irg();
5312         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5313                                                            method, NULL);
5314
5315         set_entity_compiler_generated(ptr, 1);
5316         set_entity_variability(ptr, variability_constant);
5317         set_atomic_ent_value(ptr, val);
5318 }
5319
5320 /**
5321  * Generate possible IJmp branches to a given label block.
5322  */
5323 static void gen_ijmp_branches(ir_node *block) {
5324         ir_node *ijmp;
5325         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5326                 add_immBlock_pred(block, ijmp);
5327         }
5328 }
5329
5330 /**
5331  * Create code for a function.
5332  */
5333 static void create_function(declaration_t *declaration)
5334 {
5335         ir_entity *function_entity = get_function_entity(declaration);
5336
5337         if (declaration->init.statement == NULL)
5338                 return;
5339
5340         if (declaration->modifiers & DM_CONSTRUCTOR) {
5341                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5342                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5343         }
5344         if (declaration->modifiers & DM_DESTRUCTOR) {
5345                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5346                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5347         }
5348
5349         current_function_decl = declaration;
5350         current_function_name = NULL;
5351         current_funcsig       = NULL;
5352
5353         assert(all_labels == NULL);
5354         all_labels = NEW_ARR_F(declaration_t *, 0);
5355         ijmp_list  = NULL;
5356
5357         int       n_local_vars = get_function_n_local_vars(declaration);
5358         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5359
5360         ir_graph *old_current_function = current_function;
5361         current_function = irg;
5362
5363         set_irg_fp_model(irg, firm_opt.fp_model);
5364         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5365         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5366
5367         ir_node *first_block = get_cur_block();
5368
5369         /* set inline flags */
5370         if (declaration->is_inline)
5371                 set_irg_inline_property(irg, irg_inline_recomended);
5372         handle_decl_modifier_irg(irg, declaration->modifiers);
5373
5374         next_value_number_function = 0;
5375         initialize_function_parameters(declaration);
5376
5377         statement_to_firm(declaration->init.statement);
5378
5379         ir_node *end_block = get_irg_end_block(irg);
5380
5381         /* do we have a return statement yet? */
5382         if (get_cur_block() != NULL) {
5383                 type_t *type = skip_typeref(declaration->type);
5384                 assert(is_type_function(type));
5385                 const function_type_t *func_type   = &type->function;
5386                 const type_t          *return_type
5387                         = skip_typeref(func_type->return_type);
5388
5389                 ir_node *ret;
5390                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5391                         ret = new_Return(get_store(), 0, NULL);
5392                 } else {
5393                         ir_mode *mode;
5394                         if (is_type_scalar(return_type)) {
5395                                 mode = get_ir_mode(func_type->return_type);
5396                         } else {
5397                                 mode = mode_P_data;
5398                         }
5399
5400                         ir_node *in[1];
5401                         /* §5.1.2.2.3 main implicitly returns 0 */
5402                         if (strcmp(declaration->symbol->string, "main") == 0) {
5403                                 in[0] = new_Const(mode, get_mode_null(mode));
5404                         } else {
5405                                 in[0] = new_Unknown(mode);
5406                         }
5407                         ret = new_Return(get_store(), 1, in);
5408                 }
5409                 add_immBlock_pred(end_block, ret);
5410         }
5411
5412         bool has_computed_gotos = false;
5413         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5414                 declaration_t *label = all_labels[i];
5415                 if (label->address_taken) {
5416                         gen_ijmp_branches(label->v.block);
5417                         has_computed_gotos = true;
5418                 }
5419                 mature_immBlock(label->v.block);
5420         }
5421         if (has_computed_gotos) {
5422                 /* if we have computed goto's in the function, we cannot inline it */
5423                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5424                         warningf(&declaration->source_position,
5425                                 "function '%Y' can never be inlined because it contains a computed goto",
5426                                 declaration->symbol);
5427                 }
5428                 set_irg_inline_property(irg, irg_inline_forbidden);
5429         }
5430
5431         DEL_ARR_F(all_labels);
5432         all_labels = NULL;
5433
5434         mature_immBlock(first_block);
5435         mature_immBlock(end_block);
5436
5437         irg_finalize_cons(irg);
5438
5439         /* finalize the frame type */
5440         ir_type *frame_type = get_irg_frame_type(irg);
5441         int      n          = get_compound_n_members(frame_type);
5442         int      align_all  = 4;
5443         int      offset     = 0;
5444         for(int i = 0; i < n; ++i) {
5445                 ir_entity *entity      = get_compound_member(frame_type, i);
5446                 ir_type   *entity_type = get_entity_type(entity);
5447
5448                 int align = get_type_alignment_bytes(entity_type);
5449                 if (align > align_all)
5450                         align_all = align;
5451                 int misalign = 0;
5452                 if (align > 0) {
5453                         misalign  = offset % align;
5454                         if (misalign > 0) {
5455                                 offset += align - misalign;
5456                         }
5457                 }
5458
5459                 set_entity_offset(entity, offset);
5460                 offset += get_type_size_bytes(entity_type);
5461         }
5462         set_type_size_bytes(frame_type, offset);
5463         set_type_alignment_bytes(frame_type, align_all);
5464
5465         irg_vrfy(irg);
5466         current_function = old_current_function;
5467 }
5468
5469 static void scope_to_firm(scope_t *scope)
5470 {
5471         /* first pass: create declarations */
5472         declaration_t *declaration = scope->declarations;
5473         for( ; declaration != NULL; declaration = declaration->next) {
5474                 if (declaration->namespc != NAMESPACE_NORMAL)
5475                         continue;
5476                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5477                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5478                         continue;
5479                 if (declaration->symbol == NULL)
5480                         continue;
5481
5482                 type_t *type = skip_typeref(declaration->type);
5483                 if (is_type_function(type)) {
5484                         get_function_entity(declaration);
5485                 } else {
5486                         create_global_variable(declaration);
5487                 }
5488         }
5489
5490         /* second pass: create code/initializers */
5491         declaration = scope->declarations;
5492         for( ; declaration != NULL; declaration = declaration->next) {
5493                 if (declaration->namespc != NAMESPACE_NORMAL)
5494                         continue;
5495                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5496                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5497                         continue;
5498                 if (declaration->symbol == NULL)
5499                         continue;
5500
5501                 type_t *type = declaration->type;
5502                 if (type->kind == TYPE_FUNCTION) {
5503                         create_function(declaration);
5504                 } else {
5505                         assert(declaration->declaration_kind
5506                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5507                         current_ir_graph = get_const_code_irg();
5508                         create_declaration_initializer(declaration);
5509                 }
5510         }
5511 }
5512
5513 static void set_be_option(const char *option)
5514 {
5515         int res = firm_be_option(option);
5516         assert(res);
5517 }
5518
5519 void init_ast2firm(void)
5520 {
5521         obstack_init(&asm_obst);
5522         init_atomic_modes();
5523
5524         id_underscore = new_id_from_chars("_", 1);
5525         id_imp        = new_id_from_chars("__imp_", 6);
5526
5527         /* OS option must be set to the backend */
5528         switch (firm_opt.os_support) {
5529         case OS_SUPPORT_MINGW:
5530                 create_ld_ident = create_ld_ident_win32;
5531                 set_be_option("ia32-gasmode=mingw");
5532                 break;
5533         case OS_SUPPORT_LINUX:
5534                 create_ld_ident = create_ld_ident_linux_elf;
5535                 set_be_option("ia32-gasmode=elf");
5536                 break;
5537         case OS_SUPPORT_MACHO:
5538                 create_ld_ident = create_ld_ident_macho;
5539                 set_be_option("ia32-gasmode=macho");
5540                 set_be_option("ia32-stackalign=4");
5541                 set_be_option("pic");
5542                 break;
5543         }
5544
5545         /* create idents for all known runtime functions */
5546         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5547                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5548         }
5549
5550         entitymap_init(&entitymap);
5551 }
5552
5553 static void init_ir_types(void)
5554 {
5555         static int ir_types_initialized = 0;
5556         if (ir_types_initialized)
5557                 return;
5558         ir_types_initialized = 1;
5559
5560         ir_type_int        = get_ir_type(type_int);
5561         ir_type_const_char = get_ir_type(type_const_char);
5562         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5563         ir_type_void       = get_ir_type(type_void);
5564 }
5565
5566 void exit_ast2firm(void)
5567 {
5568         entitymap_destroy(&entitymap);
5569         obstack_free(&asm_obst, NULL);
5570 }
5571
5572 static void global_asm_to_firm(statement_t *s)
5573 {
5574         for (; s != NULL; s = s->base.next) {
5575                 assert(s->kind == STATEMENT_ASM);
5576
5577                 char const *const text = s->asms.asm_text.begin;
5578                 size_t            size = s->asms.asm_text.size;
5579
5580                 /* skip the last \0 */
5581                 if (text[size - 1] == '\0')
5582                         --size;
5583
5584                 ident *const id = new_id_from_chars(text, size);
5585                 add_irp_asm(id);
5586         }
5587 }
5588
5589 void translation_unit_to_firm(translation_unit_t *unit)
5590 {
5591         /* just to be sure */
5592         continue_label      = NULL;
5593         break_label         = NULL;
5594         current_switch_cond = NULL;
5595
5596         init_ir_types();
5597
5598         scope_to_firm(&unit->scope);
5599         global_asm_to_firm(unit->global_asm);
5600
5601         current_ir_graph = NULL;
5602 }