nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "symbol_t.h"
  36 #include "token_t.h"
  37 #include "type_t.h"
  38 #include "ast_t.h"
  39 #include "entity_t.h"
  40 #include "parser.h"
  41 #include "diagnostic.h"
  42 #include "lang_features.h"
  43 #include "types.h"
  44 #include "type_hash.h"
  45 #include "mangle.h"
  46 #include "walk_statements.h"
  47 #include "warning.h"
  48 #include "entitymap_t.h"
  49 #include "driver/firm_opt.h"
  50 #include "driver/firm_cmdline.h"
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  56
  57 static int        next_value_number_function;
  58 static ir_node   *continue_label;
  59 static ir_node   *break_label;
  60 static ir_node   *current_switch_cond;
  61 static bool       saw_default_label;
  62 static label_t  **all_labels;
  63 static entity_t **inner_functions;
  64 static ir_node   *ijmp_list;
  65 static bool       constant_folding;
  66
  67 extern bool       have_const_functions;
  68
  69 static const entity_t     *current_function_entity;
  70 static ir_node            *current_function_name;
  71 static ir_node            *current_funcsig;
  72 static switch_statement_t *current_switch;
  73 static ir_graph           *current_function;
  74 static translation_unit_t *current_translation_unit;
  75
  76 static entitymap_t  entitymap;
  77
  78 static struct obstack asm_obst;
  79
  80 typedef enum declaration_kind_t {
  81         DECLARATION_KIND_UNKNOWN,
  82         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  83         DECLARATION_KIND_GLOBAL_VARIABLE,
  84         DECLARATION_KIND_LOCAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  86         DECLARATION_KIND_FUNCTION,
  87         DECLARATION_KIND_COMPOUND_MEMBER,
  88         DECLARATION_KIND_INNER_FUNCTION
  89 } declaration_kind_t;
  90
  91 static ir_mode *get_ir_mode(type_t *type);
  92 static ir_type *get_ir_type_incomplete(type_t *type);
  93
  94 static void enqueue_inner_function(entity_t *entity)
  95 {
  96         ARR_APP1(entity_t*, inner_functions, entity);
  97 }
  98
  99 static entity_t *next_inner_function(void)
 100 {
 101         int len = ARR_LEN(inner_functions);
 102         if (len == 0)
 103                 return NULL;
 104
 105         entity_t *entity = inner_functions[len-1];
 106         ARR_SHRINKLEN(inner_functions, len-1);
 107
 108         return entity;
 109 }
 110
 111 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 112 {
 113         const variable_t *variable = get_irg_loc_description(irg, pos);
 114
 115         if (variable != NULL) {
 116                 warningf(&variable->base.base.source_position,
 117                          "variable '%#T' might be used uninitialized",
 118                          variable->base.type, variable->base.base.symbol);
 119         }
 120         return new_r_Unknown(irg, mode);
 121 }
 122
 123 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 124 {
 125         const source_position_t *pos = (const source_position_t*) dbg;
 126         if (pos == NULL)
 127                 return 0;
 128         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 129                                    pos->linenr);
 130 }
 131
 132 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 133 {
 134         const source_position_t *pos = (const source_position_t*) dbg;
 135         if (pos == NULL)
 136                 return NULL;
 137         if (line != NULL)
 138                 *line = pos->linenr;
 139         return pos->input_name;
 140 }
 141
 142 static dbg_info *get_dbg_info(const source_position_t *pos)
 143 {
 144         return (dbg_info*) pos;
 145 }
 146
 147 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 148
 149 static ir_mode *mode_int, *mode_uint;
 150
 151 static ir_node *_expression_to_firm(const expression_t *expression);
 152 static ir_node *expression_to_firm(const expression_t *expression);
 153 static void create_local_declaration(entity_t *entity);
 154
 155 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 156 {
 157         unsigned flags = get_atomic_type_flags(kind);
 158         unsigned size  = get_atomic_type_size(kind);
 159         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 160                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 161                 char            name[64];
 162                 ir_mode_sort    sort;
 163                 unsigned        bit_size     = size * 8;
 164                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 165                 ir_mode_arithmetic arithmetic;
 166
 167                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 168                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 169                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 170                                  bit_size);
 171                         sort         = irms_int_number;
 172                         arithmetic   = irma_twos_complement;
 173                 } else {
 174                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 175                         snprintf(name, sizeof(name), "F%u", bit_size);
 176                         sort         = irms_float_number;
 177                         arithmetic   = irma_ieee754;
 178                 }
 179                 /* note: modulo_shift is 0, as in C it's undefined anyway to shift
 180                  * a too big amount */
 181                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 182                                    0);
 183         }
 184
 185         return NULL;
 186 }
 187
 188 /**
 189  * Initialises the atomic modes depending on the machine size.
 190  */
 191 static void init_atomic_modes(void)
 192 {
 193         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 194                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 195         }
 196         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 197         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 198
 199         /* there's no real void type in firm */
 200         atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 201
 202         /* initialize pointer modes */
 203         char            name[64];
 204         ir_mode_sort    sort         = irms_reference;
 205         unsigned        bit_size     = machine_size;
 206         bool            is_signed    = 0;
 207         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 208         unsigned        modulo_shift
 209                 = bit_size < machine_size ? machine_size : bit_size;
 210
 211         snprintf(name, sizeof(name), "p%u", machine_size);
 212         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 213                                         modulo_shift);
 214
 215         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 216         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 217
 218         /* Hmm, pointers should be machine size */
 219         set_modeP_data(ptr_mode);
 220         set_modeP_code(ptr_mode);
 221 }
 222
 223 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 224 {
 225         assert(kind <= ATOMIC_TYPE_LAST);
 226         return atomic_modes[kind];
 227 }
 228
 229 static unsigned get_compound_type_size(compound_type_t *type)
 230 {
 231         ir_type *irtype = get_ir_type((type_t*) type);
 232         return get_type_size_bytes(irtype);
 233 }
 234
 235 static unsigned get_array_type_size(array_type_t *type)
 236 {
 237         assert(!type->is_vla);
 238         ir_type *irtype = get_ir_type((type_t*) type);
 239         return get_type_size_bytes(irtype);
 240 }
 241
 242 static unsigned get_type_size_const(type_t *type)
 243 {
 244         switch(type->kind) {
 245         case TYPE_ERROR:
 246                 panic("error type occurred");
 247         case TYPE_ATOMIC:
 248                 return get_atomic_type_size(type->atomic.akind);
 249         case TYPE_COMPLEX:
 250                 return 2 * get_atomic_type_size(type->complex.akind);
 251         case TYPE_IMAGINARY:
 252                 return get_atomic_type_size(type->imaginary.akind);
 253         case TYPE_ENUM:
 254                 return get_mode_size_bytes(mode_int);
 255         case TYPE_COMPOUND_UNION:
 256         case TYPE_COMPOUND_STRUCT:
 257                 return get_compound_type_size(&type->compound);
 258         case TYPE_FUNCTION:
 259                 /* just a pointer to the function */
 260                 return get_mode_size_bytes(mode_P_code);
 261         case TYPE_POINTER:
 262         case TYPE_REFERENCE:
 263                 return get_mode_size_bytes(mode_P_data);
 264         case TYPE_ARRAY:
 265                 return get_array_type_size(&type->array);
 266         case TYPE_BUILTIN:
 267                 return get_type_size_const(type->builtin.real_type);
 268         case TYPE_BITFIELD:
 269                 panic("type size of bitfield request");
 270         case TYPE_TYPEDEF:
 271         case TYPE_TYPEOF:
 272         case TYPE_INVALID:
 273                 break;
 274         }
 275         panic("Trying to determine size of invalid type");
 276 }
 277
 278 static ir_node *get_type_size(type_t *type)
 279 {
 280         type = skip_typeref(type);
 281
 282         if (is_type_array(type) && type->array.is_vla) {
 283                 ir_node *size_node = type->array.size_node;
 284                 if (size_node == NULL) {
 285                         size_node = expression_to_firm(type->array.size_expression);
 286                         assert(!is_Const(size_node));
 287                         type->array.size_node = size_node;
 288                 }
 289
 290                 ir_node *elem_size = get_type_size(type->array.element_type);
 291                 ir_mode *mode      = get_irn_mode(size_node);
 292                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 293                 return real_size;
 294         }
 295
 296         ir_mode *mode = get_ir_mode(type_size_t);
 297         symconst_symbol sym;
 298         sym.type_p = get_ir_type(type);
 299         return new_SymConst(mode, sym, symconst_type_size);
 300 }
 301
 302 static unsigned count_parameters(const function_type_t *function_type)
 303 {
 304         unsigned count = 0;
 305
 306         function_parameter_t *parameter = function_type->parameters;
 307         for ( ; parameter != NULL; parameter = parameter->next) {
 308                 ++count;
 309         }
 310
 311         return count;
 312 }
 313
 314 /**
 315  * Creates a Firm type for an atomic type
 316  */
 317 static ir_type *create_atomic_type(const atomic_type_t *type)
 318 {
 319         atomic_type_kind_t  kind   = type->akind;
 320         ir_mode            *mode   = atomic_modes[kind];
 321         ident              *id     = get_mode_ident(mode);
 322         ir_type            *irtype = new_type_primitive(id, mode);
 323
 324         set_type_alignment_bytes(irtype, type->base.alignment);
 325
 326         return irtype;
 327 }
 328
 329 /**
 330  * Creates a Firm type for a complex type
 331  */
 332 static ir_type *create_complex_type(const complex_type_t *type)
 333 {
 334         atomic_type_kind_t  kind = type->akind;
 335         ir_mode            *mode = atomic_modes[kind];
 336         ident              *id   = get_mode_ident(mode);
 337
 338         (void) id;
 339
 340         /* FIXME: finish the array */
 341         return NULL;
 342 }
 343
 344 /**
 345  * Creates a Firm type for an imaginary type
 346  */
 347 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 348 {
 349         atomic_type_kind_t  kind      = type->akind;
 350         ir_mode            *mode      = atomic_modes[kind];
 351         ident              *id        = get_mode_ident(mode);
 352         ir_type            *irtype    = new_type_primitive(id, mode);
 353
 354         set_type_alignment_bytes(irtype, type->base.alignment);
 355
 356         return irtype;
 357 }
 358
 359 /**
 360  * return type of a parameter (and take transparent union gnu extension into
 361  * account)
 362  */
 363 static type_t *get_parameter_type(type_t *type)
 364 {
 365         type = skip_typeref(type);
 366         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 367                 compound_t *compound = type->compound.compound;
 368                 type                 = compound->members.entities->declaration.type;
 369         }
 370
 371         return type;
 372 }
 373
 374 static ir_type *create_method_type(const function_type_t *function_type)
 375 {
 376         type_t  *return_type  = skip_typeref(function_type->return_type);
 377
 378         ident   *id           = id_unique("functiontype.%u");
 379         int      n_parameters = count_parameters(function_type);
 380         int      n_results    = return_type == type_void ? 0 : 1;
 381         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 382
 383         if (return_type != type_void) {
 384                 ir_type *restype = get_ir_type(return_type);
 385                 set_method_res_type(irtype, 0, restype);
 386         }
 387
 388         function_parameter_t *parameter = function_type->parameters;
 389         int                   n         = 0;
 390         for ( ; parameter != NULL; parameter = parameter->next) {
 391                 type_t  *type     = get_parameter_type(parameter->type);
 392                 ir_type *p_irtype = get_ir_type(type);
 393                 set_method_param_type(irtype, n, p_irtype);
 394                 ++n;
 395         }
 396
 397         if (function_type->variadic || function_type->unspecified_parameters) {
 398                 set_method_variadicity(irtype, variadicity_variadic);
 399         }
 400
 401         unsigned cc = get_method_calling_convention(irtype);
 402         switch (function_type->calling_convention) {
 403         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 404         case CC_CDECL:
 405 is_cdecl:
 406                 set_method_calling_convention(irtype, SET_CDECL(cc));
 407                 break;
 408
 409         case CC_STDCALL:
 410                 if (function_type->variadic || function_type->unspecified_parameters)
 411                         goto is_cdecl;
 412
 413                 /* only non-variadic function can use stdcall, else use cdecl */
 414                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 415                 break;
 416
 417         case CC_FASTCALL:
 418                 if (function_type->variadic || function_type->unspecified_parameters)
 419                         goto is_cdecl;
 420                 /* only non-variadic function can use fastcall, else use cdecl */
 421                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 422                 break;
 423
 424         case CC_THISCALL:
 425                 /* Hmm, leave default, not accepted by the parser yet. */
 426                 break;
 427         }
 428
 429         return irtype;
 430 }
 431
 432 static ir_type *create_pointer_type(pointer_type_t *type)
 433 {
 434         type_t   *points_to    = type->points_to;
 435         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 436         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 437                                                   ir_points_to, mode_P_data);
 438
 439         return ir_type;
 440 }
 441
 442 static ir_type *create_reference_type(reference_type_t *type)
 443 {
 444         type_t  *refers_to    = type->refers_to;
 445         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 446         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 447                                                  ir_refers_to, mode_P_data);
 448
 449         return ir_type;
 450 }
 451
 452 static ir_type *create_array_type(array_type_t *type)
 453 {
 454         type_t  *element_type    = type->element_type;
 455         ir_type *ir_element_type = get_ir_type(element_type);
 456
 457         ident    *id      = id_unique("array.%u");
 458         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 459
 460         const int align = get_type_alignment_bytes(ir_element_type);
 461         set_type_alignment_bytes(ir_type, align);
 462
 463         if (type->size_constant) {
 464                 int n_elements = type->size;
 465
 466                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 467
 468                 size_t elemsize = get_type_size_bytes(ir_element_type);
 469                 if (elemsize % align > 0) {
 470                         elemsize += align - (elemsize % align);
 471                 }
 472                 set_type_size_bytes(ir_type, n_elements * elemsize);
 473         } else {
 474                 set_array_lower_bound_int(ir_type, 0, 0);
 475         }
 476         set_type_state(ir_type, layout_fixed);
 477
 478         return ir_type;
 479 }
 480
 481 /**
 482  * Return the signed integer type of size bits.
 483  *
 484  * @param size   the size
 485  */
 486 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 487                                                  unsigned size)
 488 {
 489         static ir_mode *s_modes[64 + 1] = {NULL, };
 490         ir_type *res;
 491         ir_mode *mode;
 492
 493         if (size <= 0 || size > 64)
 494                 return NULL;
 495
 496         mode = s_modes[size];
 497         if (mode == NULL) {
 498                 char name[32];
 499
 500                 snprintf(name, sizeof(name), "bf_I%u", size);
 501                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 502                                    size <= 32 ? 32 : size );
 503                 s_modes[size] = mode;
 504         }
 505
 506         char name[32];
 507         snprintf(name, sizeof(name), "I%u", size);
 508         ident *id = new_id_from_str(name);
 509         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 510         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 511         set_primitive_base_type(res, base_tp);
 512
 513         return res;
 514 }
 515
 516 /**
 517  * Return the unsigned integer type of size bits.
 518  *
 519  * @param size   the size
 520  */
 521 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 522                                                    unsigned size)
 523 {
 524         static ir_mode *u_modes[64 + 1] = {NULL, };
 525         ir_type *res;
 526         ir_mode *mode;
 527
 528         if (size <= 0 || size > 64)
 529                 return NULL;
 530
 531         mode = u_modes[size];
 532         if (mode == NULL) {
 533                 char name[32];
 534
 535                 snprintf(name, sizeof(name), "bf_U%u", size);
 536                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 537                                    size <= 32 ? 32 : size );
 538                 u_modes[size] = mode;
 539         }
 540
 541         char name[32];
 542
 543         snprintf(name, sizeof(name), "U%u", size);
 544         ident *id = new_id_from_str(name);
 545         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 546         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 547         set_primitive_base_type(res, base_tp);
 548
 549         return res;
 550 }
 551
 552 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 553 {
 554         type_t *base = skip_typeref(type->base_type);
 555         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 556         ir_type *irbase = get_ir_type(base);
 557
 558         unsigned size = type->bit_size;
 559
 560         assert(!is_type_float(base));
 561         if (is_type_signed(base)) {
 562                 return get_signed_int_type_for_bit_size(irbase, size);
 563         } else {
 564                 return get_unsigned_int_type_for_bit_size(irbase, size);
 565         }
 566 }
 567
 568 #define INVALID_TYPE ((ir_type_ptr)-1)
 569
 570 enum {
 571         COMPOUND_IS_STRUCT = false,
 572         COMPOUND_IS_UNION  = true
 573 };
 574
 575 /**
 576  * Construct firm type from ast struct type.
 577  *
 578  * As anonymous inner structs get flattened to a single firm type, we might get
 579  * irtype, outer_offset and out_align passed (they represent the position of
 580  * the anonymous inner struct inside the resulting firm struct)
 581  */
 582 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 583                                      size_t *outer_offset, size_t *outer_align,
 584                                      bool incomplete, bool is_union)
 585 {
 586         compound_t *compound = type->compound;
 587
 588         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 589                 return compound->irtype;
 590         }
 591
 592         size_t align_all  = 1;
 593         size_t offset     = 0;
 594         size_t bit_offset = 0;
 595         size_t size       = 0;
 596
 597         if (irtype == NULL) {
 598                 symbol_t *symbol = compound->base.symbol;
 599                 ident    *id;
 600                 if (symbol != NULL) {
 601                         id = new_id_from_str(symbol->string);
 602                 } else {
 603                         if (is_union) {
 604                                 id = id_unique("__anonymous_union.%u");
 605                         } else {
 606                                 id = id_unique("__anonymous_struct.%u");
 607                         }
 608                 }
 609                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 610
 611                 if (is_union) {
 612                         irtype = new_d_type_union(id, dbgi);
 613                 } else {
 614                         irtype = new_d_type_struct(id, dbgi);
 615                 }
 616
 617                 compound->irtype_complete = false;
 618                 compound->irtype          = irtype;
 619         } else {
 620                 offset    = *outer_offset;
 621                 align_all = *outer_align;
 622         }
 623
 624         if (incomplete)
 625                 return irtype;
 626
 627         compound->irtype_complete = true;
 628
 629         entity_t *entry = compound->members.entities;
 630         for ( ; entry != NULL; entry = entry->base.next) {
 631                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 632                         continue;
 633
 634                 size_t prev_offset = offset;
 635
 636                 symbol_t *symbol     = entry->base.symbol;
 637                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 638                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 639
 640                 ident    *ident;
 641                 if (symbol != NULL) {
 642                         ident = new_id_from_str(symbol->string);
 643                 } else {
 644                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 645                                 create_compound_type(&entry_type->compound, irtype, &offset,
 646                                                      &align_all, false, COMPOUND_IS_STRUCT);
 647                                 goto finished_member;
 648                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 649                                 create_compound_type(&entry_type->compound, irtype, &offset,
 650                                                      &align_all, false, COMPOUND_IS_UNION);
 651                                 goto finished_member;
 652                         } else {
 653                                 assert(entry_type->kind == TYPE_BITFIELD);
 654                         }
 655                         ident = id_unique("anon.%u");
 656                 }
 657
 658                 ir_type *base_irtype;
 659                 if (entry_type->kind == TYPE_BITFIELD) {
 660                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 661                 } else {
 662                         base_irtype = get_ir_type(entry_type);
 663                 }
 664
 665                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 666                 size_t misalign        = offset % entry_alignment;
 667
 668                 ir_type   *entry_irtype = get_ir_type(entry_type);
 669                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 670
 671                 size_t base;
 672                 size_t bits_remainder;
 673                 if (entry_type->kind == TYPE_BITFIELD) {
 674                         size_t size_bits      = entry_type->bitfield.bit_size;
 675                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 676
 677                         if (size_bits > rest_size_bits) {
 678                                 /* start a new bucket */
 679                                 offset     += entry_alignment - misalign;
 680                                 bit_offset  = 0;
 681
 682                                 base           = offset;
 683                                 bits_remainder = 0;
 684                         } else {
 685                                 /* put into current bucket */
 686                                 base           = offset - misalign;
 687                                 bits_remainder = misalign * 8 + bit_offset;
 688                         }
 689
 690                         offset     += size_bits / 8;
 691                         bit_offset  = bit_offset + (size_bits % 8);
 692                 } else {
 693                         size_t entry_size = get_type_size_bytes(base_irtype);
 694                         if (misalign > 0 || bit_offset > 0)
 695                                 offset += entry_alignment - misalign;
 696
 697                         base           = offset;
 698                         bits_remainder = 0;
 699                         offset        += entry_size;
 700                         bit_offset     = 0;
 701                 }
 702
 703                 if (entry_alignment > align_all) {
 704                         if (entry_alignment % align_all != 0) {
 705                                 panic("uneven alignments not supported yet");
 706                         }
 707                         align_all = entry_alignment;
 708                 }
 709
 710                 set_entity_offset(entity, base);
 711                 set_entity_offset_bits_remainder(entity,
 712                                                  (unsigned char) bits_remainder);
 713                 //add_struct_member(irtype, entity);
 714                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 715                 assert(entry->compound_member.entity == NULL);
 716                 entry->compound_member.entity = entity;
 717
 718 finished_member:
 719                 if (is_union) {
 720                         size_t entry_size = offset - prev_offset;
 721                         if (entry_size > size) {
 722                                 size = entry_size;
 723                         }
 724                         offset     = 0;
 725                         bit_offset = 0;
 726                 }
 727         }
 728
 729         if (!is_union) {
 730                 size = offset;
 731         }
 732
 733         size_t misalign = offset % align_all;
 734         if (misalign > 0 || bit_offset > 0) {
 735                 size += align_all - misalign;
 736         }
 737
 738         if (outer_offset != NULL) {
 739                 if (!is_union) {
 740                         *outer_offset = offset;
 741                 } else {
 742                         *outer_offset += size;
 743                 }
 744
 745                 if (align_all > *outer_align) {
 746                         if (align_all % *outer_align != 0) {
 747                                 panic("uneven alignments not supported yet");
 748                         }
 749                         *outer_align = align_all;
 750                 }
 751         } else {
 752                 set_type_alignment_bytes(irtype, align_all);
 753                 set_type_size_bytes(irtype, size);
 754                 set_type_state(irtype, layout_fixed);
 755         }
 756
 757         return irtype;
 758 }
 759
 760 static ir_type *create_enum_type(enum_type_t *const type)
 761 {
 762         type->base.firm_type = ir_type_int;
 763
 764         ir_mode *const mode    = mode_int;
 765         tarval  *const one     = get_mode_one(mode);
 766         tarval  *      tv_next = get_tarval_null(mode);
 767
 768         bool constant_folding_old = constant_folding;
 769         constant_folding = true;
 770
 771         enum_t   *enume = type->enume;
 772         entity_t *entry = enume->base.next;
 773         for (; entry != NULL; entry = entry->base.next) {
 774                 if (entry->kind != ENTITY_ENUM_VALUE)
 775                         break;
 776
 777                 expression_t *const init = entry->enum_value.value;
 778                 if (init != NULL) {
 779                         ir_node *const cnst = expression_to_firm(init);
 780                         if (!is_Const(cnst)) {
 781                                 panic("couldn't fold constant");
 782                         }
 783                         tv_next = get_Const_tarval(cnst);
 784                 }
 785                 entry->enum_value.tv = tv_next;
 786                 tv_next = tarval_add(tv_next, one);
 787         }
 788
 789         constant_folding = constant_folding_old;
 790
 791         return ir_type_int;
 792 }
 793
 794 static ir_type *get_ir_type_incomplete(type_t *type)
 795 {
 796         assert(type != NULL);
 797         type = skip_typeref(type);
 798
 799         if (type->base.firm_type != NULL) {
 800                 assert(type->base.firm_type != INVALID_TYPE);
 801                 return type->base.firm_type;
 802         }
 803
 804         switch (type->kind) {
 805         case TYPE_COMPOUND_STRUCT:
 806                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 807                                             true, COMPOUND_IS_STRUCT);
 808         case TYPE_COMPOUND_UNION:
 809                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 810                                             true, COMPOUND_IS_UNION);
 811         default:
 812                 return get_ir_type(type);
 813         }
 814 }
 815
 816 ir_type *get_ir_type(type_t *type)
 817 {
 818         assert(type != NULL);
 819
 820         type = skip_typeref(type);
 821
 822         if (type->base.firm_type != NULL) {
 823                 assert(type->base.firm_type != INVALID_TYPE);
 824                 return type->base.firm_type;
 825         }
 826
 827         ir_type *firm_type = NULL;
 828         switch (type->kind) {
 829         case TYPE_ERROR:
 830                 /* Happens while constant folding, when there was an error */
 831                 return create_atomic_type(&type_void->atomic);
 832
 833         case TYPE_ATOMIC:
 834                 firm_type = create_atomic_type(&type->atomic);
 835                 break;
 836         case TYPE_COMPLEX:
 837                 firm_type = create_complex_type(&type->complex);
 838                 break;
 839         case TYPE_IMAGINARY:
 840                 firm_type = create_imaginary_type(&type->imaginary);
 841                 break;
 842         case TYPE_FUNCTION:
 843                 firm_type = create_method_type(&type->function);
 844                 break;
 845         case TYPE_POINTER:
 846                 firm_type = create_pointer_type(&type->pointer);
 847                 break;
 848         case TYPE_REFERENCE:
 849                 firm_type = create_reference_type(&type->reference);
 850                 break;
 851         case TYPE_ARRAY:
 852                 firm_type = create_array_type(&type->array);
 853                 break;
 854         case TYPE_COMPOUND_STRUCT:
 855                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 856                                                  false, COMPOUND_IS_STRUCT);
 857                 break;
 858         case TYPE_COMPOUND_UNION:
 859                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 860                                                  false, COMPOUND_IS_UNION);
 861                 break;
 862         case TYPE_ENUM:
 863                 firm_type = create_enum_type(&type->enumt);
 864                 break;
 865         case TYPE_BUILTIN:
 866                 firm_type = get_ir_type(type->builtin.real_type);
 867                 break;
 868         case TYPE_BITFIELD:
 869                 firm_type = create_bitfield_type(&type->bitfield);
 870                 break;
 871
 872         case TYPE_TYPEOF:
 873         case TYPE_TYPEDEF:
 874         case TYPE_INVALID:
 875                 break;
 876         }
 877         if (firm_type == NULL)
 878                 panic("unknown type found");
 879
 880         type->base.firm_type = firm_type;
 881         return firm_type;
 882 }
 883
 884 ir_mode *get_ir_mode(type_t *type)
 885 {
 886         ir_type *irtype = get_ir_type(type);
 887
 888         /* firm doesn't report a mode for arrays somehow... */
 889         if (is_Array_type(irtype)) {
 890                 return mode_P_data;
 891         }
 892
 893         ir_mode *mode = get_type_mode(irtype);
 894         assert(mode != NULL);
 895         return mode;
 896 }
 897
 898 /** Names of the runtime functions. */
 899 static const struct {
 900         int        id;           /**< the rts id */
 901         int        n_res;        /**< number of return values */
 902         const char *name;        /**< the name of the rts function */
 903         int        n_params;     /**< number of parameters */
 904         unsigned   flags;        /**< language flags */
 905 } rts_data[] = {
 906         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 907         { rts_abort,      0, "abort",        0, _C89 },
 908         { rts_alloca,     1, "alloca",       1, _ALL },
 909         { rts_abs,        1, "abs",          1, _C89 },
 910         { rts_labs,       1, "labs",         1, _C89 },
 911         { rts_llabs,      1, "llabs",        1, _C99 },
 912         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 913
 914         { rts_fabs,       1, "fabs",         1, _C89 },
 915         { rts_sqrt,       1, "sqrt",         1, _C89 },
 916         { rts_cbrt,       1, "cbrt",         1, _C99 },
 917         { rts_exp,        1, "exp",          1, _C89 },
 918         { rts_exp2,       1, "exp2",         1, _C89 },
 919         { rts_exp10,      1, "exp10",        1, _GNUC },
 920         { rts_log,        1, "log",          1, _C89 },
 921         { rts_log2,       1, "log2",         1, _C89 },
 922         { rts_log10,      1, "log10",        1, _C89 },
 923         { rts_pow,        1, "pow",          2, _C89 },
 924         { rts_sin,        1, "sin",          1, _C89 },
 925         { rts_cos,        1, "cos",          1, _C89 },
 926         { rts_tan,        1, "tan",          1, _C89 },
 927         { rts_asin,       1, "asin",         1, _C89 },
 928         { rts_acos,       1, "acos",         1, _C89 },
 929         { rts_atan,       1, "atan",         1, _C89 },
 930         { rts_sinh,       1, "sinh",         1, _C89 },
 931         { rts_cosh,       1, "cosh",         1, _C89 },
 932         { rts_tanh,       1, "tanh",         1, _C89 },
 933
 934         { rts_fabsf,      1, "fabsf",        1, _C99 },
 935         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 936         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 937         { rts_expf,       1, "expf",         1, _C99 },
 938         { rts_exp2f,      1, "exp2f",        1, _C99 },
 939         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 940         { rts_logf,       1, "logf",         1, _C99 },
 941         { rts_log2f,      1, "log2f",        1, _C99 },
 942         { rts_log10f,     1, "log10f",       1, _C99 },
 943         { rts_powf,       1, "powf",         2, _C99 },
 944         { rts_sinf,       1, "sinf",         1, _C99 },
 945         { rts_cosf,       1, "cosf",         1, _C99 },
 946         { rts_tanf,       1, "tanf",         1, _C99 },
 947         { rts_asinf,      1, "asinf",        1, _C99 },
 948         { rts_acosf,      1, "acosf",        1, _C99 },
 949         { rts_atanf,      1, "atanf",        1, _C99 },
 950         { rts_sinhf,      1, "sinhf",        1, _C99 },
 951         { rts_coshf,      1, "coshf",        1, _C99 },
 952         { rts_tanhf,      1, "tanhf",        1, _C99 },
 953
 954         { rts_fabsl,      1, "fabsl",        1, _C99 },
 955         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 956         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 957         { rts_expl,       1, "expl",         1, _C99 },
 958         { rts_exp2l,      1, "exp2l",        1, _C99 },
 959         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 960         { rts_logl,       1, "logl",         1, _C99 },
 961         { rts_log2l,      1, "log2l",        1, _C99 },
 962         { rts_log10l,     1, "log10l",       1, _C99 },
 963         { rts_powl,       1, "powl",         2, _C99 },
 964         { rts_sinl,       1, "sinl",         1, _C99 },
 965         { rts_cosl,       1, "cosl",         1, _C99 },
 966         { rts_tanl,       1, "tanl",         1, _C99 },
 967         { rts_asinl,      1, "asinl",        1, _C99 },
 968         { rts_acosl,      1, "acosl",        1, _C99 },
 969         { rts_atanl,      1, "atanl",        1, _C99 },
 970         { rts_sinhl,      1, "sinhl",        1, _C99 },
 971         { rts_coshl,      1, "coshl",        1, _C99 },
 972         { rts_tanhl,      1, "tanhl",        1, _C99 },
 973
 974         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 975         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 976         { rts_strcmp,     1, "strcmp",       2, _C89 },
 977         { rts_strncmp,    1, "strncmp",      3, _C89 }
 978 };
 979
 980 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 981
 982 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 983
 984 /**
 985  * Handle GNU attributes for entities
 986  *
 987  * @param ent   the entity
 988  * @param decl  the routine declaration
 989  */
 990 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
 991 {
 992         assert(is_declaration(entity));
 993         decl_modifiers_t modifiers = entity->declaration.modifiers;
 994         if (modifiers & DM_PURE) {
 995                 /* TRUE if the declaration includes the GNU
 996                    __attribute__((pure)) specifier. */
 997                 set_entity_additional_property(irentity, mtp_property_pure);
 998         }
 999         if (modifiers & DM_CONST) {
1000                 set_entity_additional_property(irentity, mtp_property_const);
1001                 have_const_functions = true;
1002         }
1003         if (modifiers & DM_USED) {
1004                 /* TRUE if the declaration includes the GNU
1005                    __attribute__((used)) specifier. */
1006                 set_entity_stickyness(irentity, stickyness_sticky);
1007         }
1008 }
1009
1010 static bool is_main(entity_t *entity)
1011 {
1012         static symbol_t *sym_main = NULL;
1013         if (sym_main == NULL) {
1014                 sym_main = symbol_table_insert("main");
1015         }
1016
1017         if (entity->base.symbol != sym_main)
1018                 return false;
1019         /* must be in outermost scope */
1020         if (entity->base.parent_scope != &current_translation_unit->scope)
1021                 return false;
1022
1023         return true;
1024 }
1025
1026 /**
1027  * Creates an entity representing a function.
1028  *
1029  * @param declaration  the function declaration
1030  */
1031 static ir_entity *get_function_entity(entity_t *entity)
1032 {
1033         assert(entity->kind == ENTITY_FUNCTION);
1034         if (entity->function.entity != NULL) {
1035                 return entity->function.entity;
1036         }
1037
1038         if (is_main(entity)) {
1039                 /* force main to C linkage */
1040                 type_t *type = entity->declaration.type;
1041                 assert(is_type_function(type));
1042                 if (type->function.linkage != LINKAGE_C) {
1043                         type_t *new_type           = duplicate_type(type);
1044                         new_type->function.linkage = LINKAGE_C;
1045
1046                         type = typehash_insert(new_type);
1047                         if (type != new_type) {
1048                                 obstack_free(type_obst, new_type);
1049                         }
1050                         entity->declaration.type = type;
1051                 }
1052         }
1053
1054         symbol_t *symbol = entity->base.symbol;
1055         ident    *id     = new_id_from_str(symbol->string);
1056
1057         ir_type   *global_type    = get_glob_type();
1058         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1059         bool const has_body       = entity->function.statement != NULL;
1060
1061         /* already an entity defined? */
1062         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1063         if (irentity != NULL) {
1064                 if (get_entity_visibility(irentity) == visibility_external_allocated
1065                                 && has_body) {
1066                         set_entity_visibility(irentity, visibility_external_visible);
1067                 }
1068                 goto entity_created;
1069         }
1070
1071         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1072         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1073         set_entity_ld_ident(irentity, create_ld_ident(entity));
1074
1075         handle_gnu_attributes_ent(irentity, entity);
1076
1077         /* static inline             => local
1078          * extern inline             => local
1079          * inline without definition => local
1080          * inline with definition    => external_visible */
1081         storage_class_tag_t const storage_class
1082                 = (storage_class_tag_t) entity->declaration.storage_class;
1083         bool                const is_inline     = entity->function.is_inline;
1084         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1085                 set_entity_visibility(irentity, visibility_external_visible);
1086         } else if (storage_class == STORAGE_CLASS_STATIC ||
1087                    (is_inline && has_body)) {
1088                 if (!has_body) {
1089                         /* this entity was declared, but is defined nowhere */
1090                         set_entity_peculiarity(irentity, peculiarity_description);
1091                 }
1092                 set_entity_visibility(irentity, visibility_local);
1093         } else if (has_body) {
1094                 set_entity_visibility(irentity, visibility_external_visible);
1095         } else {
1096                 set_entity_visibility(irentity, visibility_external_allocated);
1097         }
1098         set_entity_allocation(irentity, allocation_static);
1099
1100         /* We should check for file scope here, but as long as we compile C only
1101            this is not needed. */
1102         if (! firm_opt.freestanding) {
1103                 /* check for a known runtime function */
1104                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1105                         if (id != rts_idents[i])
1106                                 continue;
1107
1108                         /* ignore those rts functions not necessary needed for current mode */
1109                         if ((c_mode & rts_data[i].flags) == 0)
1110                                 continue;
1111                         assert(rts_entities[rts_data[i].id] == NULL);
1112                         rts_entities[rts_data[i].id] = irentity;
1113                 }
1114         }
1115
1116         entitymap_insert(&entitymap, symbol, irentity);
1117
1118 entity_created:
1119         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1120         entity->function.entity  = irentity;
1121
1122         return irentity;
1123 }
1124
1125 /**
1126  * Creates a Const node representing a constant.
1127  */
1128 static ir_node *const_to_firm(const const_expression_t *cnst)
1129 {
1130         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1131         ir_mode  *mode = get_ir_mode(cnst->base.type);
1132
1133         char    buf[128];
1134         tarval *tv;
1135         size_t  len;
1136         if (mode_is_float(mode)) {
1137                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1138         } else {
1139                 if (mode_is_signed(mode)) {
1140                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1141                 } else {
1142                         len = snprintf(buf, sizeof(buf), "%llu",
1143                                        (unsigned long long) cnst->v.int_value);
1144                 }
1145                 tv = new_tarval_from_str(buf, len, mode);
1146         }
1147
1148         return new_d_Const(dbgi, mode, tv);
1149 }
1150
1151 /**
1152  * Creates a Const node representing a character constant.
1153  */
1154 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1155 {
1156         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1157         ir_mode  *mode = get_ir_mode(cnst->base.type);
1158
1159         long long int v = 0;
1160         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1161                 if (char_is_signed) {
1162                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1163                 } else {
1164                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1165                 }
1166         }
1167         char    buf[128];
1168         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1169         tarval *tv = new_tarval_from_str(buf, len, mode);
1170
1171         return new_d_Const(dbgi, mode, tv);
1172 }
1173
1174 /**
1175  * Creates a Const node representing a wide character constant.
1176  */
1177 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1178 {
1179         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1180         ir_mode  *mode = get_ir_mode(cnst->base.type);
1181
1182         long long int v = cnst->v.wide_character.begin[0];
1183
1184         char    buf[128];
1185         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1186         tarval *tv = new_tarval_from_str(buf, len, mode);
1187
1188         return new_d_Const(dbgi, mode, tv);
1189 }
1190
1191 /**
1192  * Creates a SymConst for a given entity.
1193  *
1194  * @param dbgi    debug info
1195  * @param mode    the (reference) mode for the SymConst
1196  * @param entity  the entity
1197  */
1198 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1199                               ir_entity *entity)
1200 {
1201         assert(entity != NULL);
1202         union symconst_symbol sym;
1203         sym.entity_p = entity;
1204         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1205 }
1206
1207 /**
1208  * Creates a SymConst node representing a string constant.
1209  *
1210  * @param src_pos    the source position of the string constant
1211  * @param id_prefix  a prefix for the name of the generated string constant
1212  * @param value      the value of the string constant
1213  */
1214 static ir_node *string_to_firm(const source_position_t *const src_pos,
1215                                const char *const id_prefix,
1216                                const string_t *const value)
1217 {
1218         ir_type  *const global_type = get_glob_type();
1219         dbg_info *const dbgi        = get_dbg_info(src_pos);
1220         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1221                                                        ir_type_const_char, dbgi);
1222
1223         ident     *const id     = id_unique(id_prefix);
1224         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1225         set_entity_ld_ident(entity, id);
1226         set_entity_variability(entity, variability_constant);
1227         set_entity_allocation(entity, allocation_static);
1228
1229         ir_type *const elem_type = ir_type_const_char;
1230         ir_mode *const mode      = get_type_mode(elem_type);
1231
1232         const char* const string = value->begin;
1233         const size_t      slen   = value->size;
1234
1235         set_array_lower_bound_int(type, 0, 0);
1236         set_array_upper_bound_int(type, 0, slen);
1237         set_type_size_bytes(type, slen);
1238         set_type_state(type, layout_fixed);
1239
1240         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1241         for (size_t i = 0; i < slen; ++i) {
1242                 tvs[i] = new_tarval_from_long(string[i], mode);
1243         }
1244
1245         set_array_entity_values(entity, tvs, slen);
1246         free(tvs);
1247
1248         return create_symconst(dbgi, mode_P_data, entity);
1249 }
1250
1251 /**
1252  * Creates a SymConst node representing a string literal.
1253  *
1254  * @param literal   the string literal
1255  */
1256 static ir_node *string_literal_to_firm(
1257                 const string_literal_expression_t* literal)
1258 {
1259         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1260                               &literal->value);
1261 }
1262
1263 /**
1264  * Creates a SymConst node representing a wide string literal.
1265  *
1266  * @param literal   the wide string literal
1267  */
1268 static ir_node *wide_string_literal_to_firm(
1269         const wide_string_literal_expression_t* const literal)
1270 {
1271         ir_type *const global_type = get_glob_type();
1272         ir_type *const elem_type   = ir_type_wchar_t;
1273         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1274         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1275                                                     elem_type, dbgi);
1276
1277         ident     *const id     = id_unique("Lstr.%u");
1278         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1279         set_entity_ld_ident(entity, id);
1280         set_entity_variability(entity, variability_constant);
1281         set_entity_allocation(entity, allocation_static);
1282
1283         ir_mode *const mode      = get_type_mode(elem_type);
1284
1285         const wchar_rep_t *const string = literal->value.begin;
1286         const size_t             slen   = literal->value.size;
1287
1288         set_array_lower_bound_int(type, 0, 0);
1289         set_array_upper_bound_int(type, 0, slen);
1290         set_type_size_bytes(type, slen);
1291         set_type_state(type, layout_fixed);
1292
1293         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1294         for (size_t i = 0; i < slen; ++i) {
1295                 tvs[i] = new_tarval_from_long(string[i], mode);
1296         }
1297
1298         set_array_entity_values(entity, tvs, slen);
1299         free(tvs);
1300
1301         return create_symconst(dbgi, mode_P_data, entity);
1302 }
1303
1304 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1305                                       ir_node *const addr)
1306 {
1307         ir_type *irtype = get_ir_type(type);
1308         if (is_compound_type(irtype)
1309                         || is_Method_type(irtype)
1310                         || is_Array_type(irtype)) {
1311                 return addr;
1312         }
1313
1314         ir_mode *const mode     = get_type_mode(irtype);
1315         ir_node *const memory   = get_store();
1316         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1317         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1318         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1319
1320         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1321                 set_Load_volatility(load, volatility_is_volatile);
1322         }
1323
1324         set_store(load_mem);
1325         return load_res;
1326 }
1327
1328 /**
1329  * Creates a strict Conv if neccessary.
1330  */
1331 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1332 {
1333         ir_mode *mode = get_irn_mode(node);
1334
1335         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1336                 return node;
1337         if (!mode_is_float(mode))
1338                 return node;
1339
1340         /* check if there is already a Conv */
1341         if (is_Conv(node)) {
1342                 /* convert it into a strict Conv */
1343                 set_Conv_strict(node, 1);
1344                 return node;
1345         }
1346
1347         /* otherwise create a new one */
1348         return new_d_strictConv(dbgi, node, mode);
1349 }
1350
1351 static ir_node *get_global_var_address(dbg_info *const dbgi,
1352                                        const entity_t *const entity)
1353 {
1354         assert(entity->kind == ENTITY_VARIABLE);
1355         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1356
1357         ir_entity *const irentity = entity->variable.v.entity;
1358         if (entity->variable.thread_local) {
1359                 ir_node *const no_mem = new_NoMem();
1360                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1361                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1362         } else {
1363                 return create_symconst(dbgi, mode_P_data, irentity);
1364         }
1365 }
1366
1367 /**
1368  * Returns the correct base address depending on whether it is a parameter or a
1369  * normal local variable.
1370  */
1371 static ir_node *get_local_frame(ir_entity *const ent)
1372 {
1373         ir_graph      *const irg   = current_ir_graph;
1374         const ir_type *const owner = get_entity_owner(ent);
1375         if (owner == get_irg_frame_type(irg)) {
1376                 return get_irg_frame(irg);
1377         } else {
1378                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1379                 return get_irg_value_param_base(irg);
1380         }
1381 }
1382
1383 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1384 {
1385         ir_mode *value_mode = get_irn_mode(value);
1386
1387         if (value_mode == dest_mode || is_Bad(value))
1388                 return value;
1389
1390         if (dest_mode == mode_b) {
1391                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1392                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1393                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1394                 return proj;
1395         }
1396
1397         return new_d_Conv(dbgi, value, dest_mode);
1398 }
1399
1400 /**
1401  * Keep all memory edges of the given block.
1402  */
1403 static void keep_all_memory(ir_node *block) {
1404         ir_node *old = get_cur_block();
1405
1406         set_cur_block(block);
1407         keep_alive(get_store());
1408         /* TODO: keep all memory edges from restricted pointers */
1409         set_cur_block(old);
1410 }
1411
1412 static ir_node *reference_expression_enum_value_to_firm(
1413                 const reference_expression_t *ref)
1414 {
1415         entity_t *entity = ref->entity;
1416         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1417         /* make sure the type is constructed */
1418         (void) get_ir_type(type);
1419
1420         ir_mode *const mode = get_ir_mode(type);
1421         return new_Const(mode, entity->enum_value.tv);
1422 }
1423
1424 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1425 {
1426         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1427         entity_t *entity = ref->entity;
1428         assert(is_declaration(entity));
1429         type_t   *type   = skip_typeref(entity->declaration.type);
1430
1431         /* make sure the type is constructed */
1432         (void) get_ir_type(type);
1433
1434         switch ((declaration_kind_t) entity->declaration.kind) {
1435         case DECLARATION_KIND_UNKNOWN:
1436                 break;
1437
1438         case DECLARATION_KIND_LOCAL_VARIABLE: {
1439                 ir_mode *const mode = get_ir_mode(type);
1440                 return get_value(entity->variable.v.value_number, mode);
1441         }
1442         case DECLARATION_KIND_FUNCTION: {
1443                 ir_mode *const mode = get_ir_mode(type);
1444                 return create_symconst(dbgi, mode, entity->function.entity);
1445         }
1446         case DECLARATION_KIND_INNER_FUNCTION: {
1447                 ir_mode *const mode = get_ir_mode(type);
1448                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1449                         /* inner function not using the closure */
1450                         return create_symconst(dbgi, mode, entity->function.entity);
1451                 } else {
1452                         /* TODO: need trampoline here */
1453                         panic("Trampoline code not implemented");
1454                         return create_symconst(dbgi, mode, entity->function.entity);
1455                 }
1456         }
1457         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1458                 ir_node *const addr = get_global_var_address(dbgi, entity);
1459                 return deref_address(dbgi, entity->declaration.type, addr);
1460         }
1461
1462         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1463                 ir_entity *irentity = entity->variable.v.entity;
1464                 ir_node   *frame    = get_local_frame(irentity);
1465                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1466                 return deref_address(dbgi, entity->declaration.type, sel);
1467         }
1468
1469         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1470                 return entity->variable.v.vla_base;
1471
1472         case DECLARATION_KIND_COMPOUND_MEMBER:
1473                 panic("not implemented reference type");
1474         }
1475
1476         panic("reference to declaration with unknown type found");
1477 }
1478
1479 static ir_node *reference_addr(const reference_expression_t *ref)
1480 {
1481         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1482         entity_t *entity = ref->entity;
1483         assert(is_declaration(entity));
1484
1485         switch((declaration_kind_t) entity->declaration.kind) {
1486         case DECLARATION_KIND_UNKNOWN:
1487                 break;
1488         case DECLARATION_KIND_LOCAL_VARIABLE:
1489                 /* you can store to a local variable (so we don't panic but return NULL
1490                  * as an indicator for no real address) */
1491                 return NULL;
1492         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1493                 ir_node *const addr = get_global_var_address(dbgi, entity);
1494                 return addr;
1495         }
1496         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1497                 ir_entity *irentity = entity->variable.v.entity;
1498                 ir_node   *frame    = get_local_frame(irentity);
1499                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1500
1501                 return sel;
1502         }
1503
1504         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1505                 return entity->variable.v.vla_base;
1506
1507         case DECLARATION_KIND_FUNCTION: {
1508                 type_t  *const type = skip_typeref(entity->declaration.type);
1509                 ir_mode *const mode = get_ir_mode(type);
1510                 return create_symconst(dbgi, mode, entity->function.entity);
1511         }
1512
1513         case DECLARATION_KIND_INNER_FUNCTION:
1514         case DECLARATION_KIND_COMPOUND_MEMBER:
1515                 panic("not implemented reference type");
1516         }
1517
1518         panic("reference to declaration with unknown type found");
1519 }
1520
1521 /**
1522  * Transform calls to builtin functions.
1523  */
1524 static ir_node *process_builtin_call(const call_expression_t *call)
1525 {
1526         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1527
1528         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1529         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1530
1531         type_t *type = skip_typeref(builtin->base.type);
1532         assert(is_type_pointer(type));
1533
1534         type_t   *function_type = skip_typeref(type->pointer.points_to);
1535         symbol_t *symbol        = builtin->symbol;
1536
1537         switch(symbol->ID) {
1538         case T___builtin_alloca: {
1539                 if (call->arguments == NULL || call->arguments->next != NULL) {
1540                         panic("invalid number of parameters on __builtin_alloca");
1541                 }
1542                 expression_t *argument = call->arguments->expression;
1543                 ir_node      *size     = expression_to_firm(argument);
1544
1545                 ir_node *store  = get_store();
1546                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1547                                               stack_alloc);
1548                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1549                 set_store(proj_m);
1550                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1551
1552                 return res;
1553         }
1554
1555         case T___builtin_huge_val:
1556         case T___builtin_inf:
1557         case T___builtin_inff:
1558         case T___builtin_infl: {
1559                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1560                 tarval  *tv   = get_mode_infinite(mode);
1561                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1562                 return   res;
1563         }
1564         case T___builtin_nan:
1565         case T___builtin_nanf:
1566         case T___builtin_nanl: {
1567                 /* Ignore string for now... */
1568                 assert(is_type_function(function_type));
1569                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1570                 tarval  *tv   = get_mode_NAN(mode);
1571                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1572                 return res;
1573         }
1574         case T___builtin_va_end:
1575                 return NULL;
1576         default:
1577                 panic("Unsupported builtin found\n");
1578         }
1579 }
1580
1581 /**
1582  * Transform a call expression.
1583  * Handles some special cases, like alloca() calls, which must be resolved
1584  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1585  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1586  * handled right...
1587  */
1588 static ir_node *call_expression_to_firm(const call_expression_t *call)
1589 {
1590         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1591         assert(get_cur_block() != NULL);
1592
1593         expression_t *function = call->function;
1594         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1595                 return process_builtin_call(call);
1596         }
1597         if (function->kind == EXPR_REFERENCE) {
1598                 const reference_expression_t *ref    = &function->reference;
1599                 entity_t                     *entity = ref->entity;
1600
1601                 if (entity->kind == ENTITY_FUNCTION
1602                                 && entity->function.entity == rts_entities[rts_alloca]) {
1603                         /* handle alloca() call */
1604                         expression_t *argument = call->arguments->expression;
1605                         ir_node      *size     = expression_to_firm(argument);
1606
1607                         size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1608
1609                         ir_node  *store  = get_store();
1610                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1611                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1612                                                        stack_alloc);
1613                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1614                         set_store(proj_m);
1615                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1616
1617                         return res;
1618                 }
1619         }
1620         ir_node *callee = expression_to_firm(function);
1621
1622         type_t *type = skip_typeref(function->base.type);
1623         assert(is_type_pointer(type));
1624         pointer_type_t *pointer_type = &type->pointer;
1625         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1626         assert(is_type_function(points_to));
1627         function_type_t *function_type = &points_to->function;
1628
1629         int      n_parameters = 0;
1630         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1631         ir_type *new_method_type = NULL;
1632         if (function_type->variadic || function_type->unspecified_parameters) {
1633                 const call_argument_t *argument = call->arguments;
1634                 for ( ; argument != NULL; argument = argument->next) {
1635                         ++n_parameters;
1636                 }
1637
1638                 /* we need to construct a new method type matching the call
1639                  * arguments... */
1640                 int n_res       = get_method_n_ress(ir_method_type);
1641                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1642                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1643                                                     n_parameters, n_res, dbgi);
1644                 set_method_calling_convention(new_method_type,
1645                                get_method_calling_convention(ir_method_type));
1646                 set_method_additional_properties(new_method_type,
1647                                get_method_additional_properties(ir_method_type));
1648                 set_method_variadicity(new_method_type,
1649                                        get_method_variadicity(ir_method_type));
1650
1651                 for (int i = 0; i < n_res; ++i) {
1652                         set_method_res_type(new_method_type, i,
1653                                             get_method_res_type(ir_method_type, i));
1654                 }
1655                 argument = call->arguments;
1656                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1657                         expression_t *expression = argument->expression;
1658                         ir_type      *irtype     = get_ir_type(expression->base.type);
1659                         set_method_param_type(new_method_type, i, irtype);
1660                 }
1661                 ir_method_type = new_method_type;
1662         } else {
1663                 n_parameters = get_method_n_params(ir_method_type);
1664         }
1665
1666         ir_node *in[n_parameters];
1667
1668         const call_argument_t *argument = call->arguments;
1669         for (int n = 0; n < n_parameters; ++n) {
1670                 expression_t *expression = argument->expression;
1671                 ir_node      *arg_node   = expression_to_firm(expression);
1672
1673                 arg_node = do_strict_conv(dbgi, arg_node);
1674
1675                 in[n] = arg_node;
1676
1677                 argument = argument->next;
1678         }
1679
1680         ir_node  *store = get_store();
1681         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1682                                      ir_method_type);
1683         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1684         set_store(mem);
1685
1686         type_t  *return_type = skip_typeref(function_type->return_type);
1687         ir_node *result      = NULL;
1688
1689         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1690                 ir_mode *mode;
1691                 if (is_type_scalar(return_type)) {
1692                         mode = get_ir_mode(return_type);
1693                 } else {
1694                         mode = mode_P_data;
1695                 }
1696                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1697                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1698         }
1699
1700         if (function->kind == EXPR_REFERENCE &&
1701             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1702                 /* A dead end:  Keep the Call and the Block.  Also place all further
1703                  * nodes into a new and unreachable block. */
1704                 keep_alive(node);
1705                 keep_alive(get_cur_block());
1706                 new_Block(0, NULL);
1707         }
1708
1709         return result;
1710 }
1711
1712 static void statement_to_firm(statement_t *statement);
1713 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1714
1715 static ir_node *expression_to_addr(const expression_t *expression);
1716 static ir_node *create_condition_evaluation(const expression_t *expression,
1717                                             ir_node *true_block,
1718                                             ir_node *false_block);
1719
1720 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1721                          ir_node *value)
1722 {
1723         value = do_strict_conv(dbgi, value);
1724
1725         ir_node *memory = get_store();
1726
1727         if (is_type_scalar(type)) {
1728                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1729                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1730                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1731                         set_Store_volatility(store, volatility_is_volatile);
1732                 set_store(store_mem);
1733         } else {
1734                 ir_type *irtype    = get_ir_type(type);
1735                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1736                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1737                 set_store(copyb_mem);
1738         }
1739 }
1740
1741 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1742 {
1743         tarval *all_one   = get_mode_all_one(mode);
1744         int     mode_size = get_mode_size_bits(mode);
1745
1746         assert(offset >= 0);
1747         assert(size   >= 0);
1748         assert(offset + size <= mode_size);
1749         if (size == mode_size) {
1750                 return all_one;
1751         }
1752
1753         long    shiftr    = get_mode_size_bits(mode) - size;
1754         long    shiftl    = offset;
1755         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1756         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1757         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1758         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1759
1760         return mask1;
1761 }
1762
1763 static void bitfield_store_to_firm(dbg_info *dbgi,
1764                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1765 {
1766         ir_type *entity_type = get_entity_type(entity);
1767         ir_type *base_type   = get_primitive_base_type(entity_type);
1768         assert(base_type != NULL);
1769         ir_mode *mode        = get_type_mode(base_type);
1770
1771         value = create_conv(dbgi, value, mode);
1772
1773         /* kill upper bits of value and shift to right position */
1774         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1775         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1776
1777         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1778         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1779         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1780         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1781         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1782         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1783
1784         /* load current value */
1785         ir_node  *mem             = get_store();
1786         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1787         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1788         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1789         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1790         tarval   *inv_mask        = tarval_not(shift_mask);
1791         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1792         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1793
1794         /* construct new value and store */
1795         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1796         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1797         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1798         set_store(store_mem);
1799
1800         if (set_volatile) {
1801                 set_Load_volatility(load, volatility_is_volatile);
1802                 set_Store_volatility(store, volatility_is_volatile);
1803         }
1804 }
1805
1806 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1807                 ir_node *addr)
1808 {
1809         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1810         type_t   *type     = expression->base.type;
1811         ir_mode  *mode     = get_ir_mode(type);
1812         ir_node  *mem      = get_store();
1813         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1814         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1815         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1816
1817         load_res           = create_conv(dbgi, load_res, mode_int);
1818
1819         set_store(load_mem);
1820
1821         /* kill upper bits */
1822         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1823         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1824         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1825         ir_type   *entity_type  = get_entity_type(entity);
1826         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1827         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1828         assert(shift_bitsl >= 0);
1829         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1830         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1831         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1832
1833         long       shift_bitsr  = bitoffset + shift_bitsl;
1834         assert(shift_bitsr <= (long) machine_size);
1835         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1836         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1837         ir_node   *shiftr;
1838         if (mode_is_signed(mode)) {
1839                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1840         } else {
1841                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1842         }
1843
1844         return create_conv(dbgi, shiftr, mode);
1845 }
1846
1847 /* make sure the selected compound type is constructed */
1848 static void construct_select_compound(const select_expression_t *expression)
1849 {
1850         type_t *type = skip_typeref(expression->compound->base.type);
1851         if (is_type_pointer(type)) {
1852                 type = type->pointer.points_to;
1853         }
1854         (void) get_ir_type(type);
1855 }
1856
1857 static void set_value_for_expression_addr(const expression_t *expression,
1858                                           ir_node *value, ir_node *addr)
1859 {
1860         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1861         value          = do_strict_conv(dbgi, value);
1862
1863         if (expression->kind == EXPR_REFERENCE) {
1864                 const reference_expression_t *ref = &expression->reference;
1865
1866                 entity_t *entity = ref->entity;
1867                 assert(is_declaration(entity));
1868                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1869                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1870                         set_value(entity->variable.v.value_number, value);
1871                         return;
1872                 }
1873         }
1874
1875         if (addr == NULL)
1876                 addr = expression_to_addr(expression);
1877
1878         type_t *type = skip_typeref(expression->base.type);
1879
1880         if (expression->kind == EXPR_SELECT) {
1881                 const select_expression_t *select = &expression->select;
1882
1883                 construct_select_compound(select);
1884
1885                 entity_t *entity = select->compound_entry;
1886                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1887                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1888                         ir_entity *irentity = entity->compound_member.entity;
1889                         bool       set_volatile
1890                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1891                         bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1892                         return;
1893                 }
1894         }
1895
1896         assign_value(dbgi, addr, type, value);
1897 }
1898
1899 static void set_value_for_expression(const expression_t *expression,
1900                                      ir_node *value)
1901 {
1902         set_value_for_expression_addr(expression, value, NULL);
1903 }
1904
1905 static ir_node *get_value_from_lvalue(const expression_t *expression,
1906                                       ir_node *addr)
1907 {
1908         if (expression->kind == EXPR_REFERENCE) {
1909                 const reference_expression_t *ref = &expression->reference;
1910
1911                 entity_t *entity = ref->entity;
1912                 assert(entity->kind == ENTITY_VARIABLE);
1913                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1914                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1915                         assert(addr == NULL);
1916                         ir_mode *mode = get_ir_mode(expression->base.type);
1917                         return get_value(entity->variable.v.value_number, mode);
1918                 }
1919         }
1920
1921         assert(addr != NULL);
1922         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1923
1924         ir_node *value;
1925         if (expression->kind == EXPR_SELECT &&
1926             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1927             construct_select_compound(&expression->select);
1928                 value = bitfield_extract_to_firm(&expression->select, addr);
1929         } else {
1930                 value = deref_address(dbgi, expression->base.type, addr);
1931         }
1932
1933         return value;
1934 }
1935
1936
1937 static ir_node *create_incdec(const unary_expression_t *expression)
1938 {
1939         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1940         const expression_t *value_expr = expression->value;
1941         ir_node            *addr       = expression_to_addr(value_expr);
1942         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1943
1944         type_t  *type = skip_typeref(expression->base.type);
1945         ir_mode *mode = get_ir_mode(expression->base.type);
1946
1947         ir_node *offset;
1948         if (is_type_pointer(type)) {
1949                 pointer_type_t *pointer_type = &type->pointer;
1950                 offset                       = get_type_size(pointer_type->points_to);
1951         } else {
1952                 assert(is_type_arithmetic(type));
1953                 offset = new_Const(mode, get_mode_one(mode));
1954         }
1955
1956         ir_node *result;
1957         ir_node *store_value;
1958         switch(expression->base.kind) {
1959         case EXPR_UNARY_POSTFIX_INCREMENT:
1960                 result      = value;
1961                 store_value = new_d_Add(dbgi, value, offset, mode);
1962                 break;
1963         case EXPR_UNARY_POSTFIX_DECREMENT:
1964                 result      = value;
1965                 store_value = new_d_Sub(dbgi, value, offset, mode);
1966                 break;
1967         case EXPR_UNARY_PREFIX_INCREMENT:
1968                 result      = new_d_Add(dbgi, value, offset, mode);
1969                 store_value = result;
1970                 break;
1971         case EXPR_UNARY_PREFIX_DECREMENT:
1972                 result      = new_d_Sub(dbgi, value, offset, mode);
1973                 store_value = result;
1974                 break;
1975         default:
1976                 panic("no incdec expr in create_incdec");
1977         }
1978
1979         set_value_for_expression_addr(value_expr, store_value, addr);
1980
1981         return result;
1982 }
1983
1984 static bool is_local_variable(expression_t *expression)
1985 {
1986         if (expression->kind != EXPR_REFERENCE)
1987                 return false;
1988         reference_expression_t *ref_expr = &expression->reference;
1989         entity_t               *entity   = ref_expr->entity;
1990         if (entity->kind != ENTITY_VARIABLE)
1991                 return false;
1992         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1993         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
1994 }
1995
1996 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1997 {
1998         switch(kind) {
1999         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2000         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2001         case EXPR_BINARY_NOTEQUAL:
2002                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2003         case EXPR_BINARY_ISLESS:
2004         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2005         case EXPR_BINARY_ISLESSEQUAL:
2006         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2007         case EXPR_BINARY_ISGREATER:
2008         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2009         case EXPR_BINARY_ISGREATEREQUAL:
2010         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2011         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2012
2013         default:
2014                 break;
2015         }
2016         panic("trying to get pn_Cmp from non-comparison binexpr type");
2017 }
2018
2019 /**
2020  * Handle the assume optimizer hint: check if a Confirm
2021  * node can be created.
2022  *
2023  * @param dbi    debug info
2024  * @param expr   the IL assume expression
2025  *
2026  * we support here only some simple cases:
2027  *  - var rel const
2028  *  - const rel val
2029  *  - var rel var
2030  */
2031 static ir_node *handle_assume_compare(dbg_info *dbi,
2032                                       const binary_expression_t *expression)
2033 {
2034         expression_t *op1 = expression->left;
2035         expression_t *op2 = expression->right;
2036         entity_t     *var2, *var = NULL;
2037         ir_node      *res = NULL;
2038         pn_Cmp        cmp_val;
2039
2040         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2041
2042         if (is_local_variable(op1) && is_local_variable(op2)) {
2043         var  = op1->reference.entity;
2044             var2 = op2->reference.entity;
2045
2046                 type_t  *const type = skip_typeref(var->declaration.type);
2047                 ir_mode *const mode = get_ir_mode(type);
2048
2049                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2050                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2051
2052                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2053                 set_value(var2->variable.v.value_number, res);
2054
2055                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2056                 set_value(var->variable.v.value_number, res);
2057
2058                 return res;
2059         }
2060
2061         expression_t *con;
2062         if (is_local_variable(op1) && is_constant_expression(op2)) {
2063                 var = op1->reference.entity;
2064                 con = op2;
2065         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2066                 cmp_val = get_inversed_pnc(cmp_val);
2067                 var = op2->reference.entity;
2068                 con = op1;
2069         }
2070
2071         if (var != NULL) {
2072                 type_t  *const type = skip_typeref(var->declaration.type);
2073                 ir_mode *const mode = get_ir_mode(type);
2074
2075                 res = get_value(var->variable.v.value_number, mode);
2076                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2077                 set_value(var->variable.v.value_number, res);
2078         }
2079         return res;
2080 }
2081
2082 /**
2083  * Handle the assume optimizer hint.
2084  *
2085  * @param dbi    debug info
2086  * @param expr   the IL assume expression
2087  */
2088 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2089         switch(expression->kind) {
2090         case EXPR_BINARY_EQUAL:
2091         case EXPR_BINARY_NOTEQUAL:
2092         case EXPR_BINARY_LESS:
2093         case EXPR_BINARY_LESSEQUAL:
2094         case EXPR_BINARY_GREATER:
2095         case EXPR_BINARY_GREATEREQUAL:
2096                 return handle_assume_compare(dbi, &expression->binary);
2097         default:
2098                 return NULL;
2099         }
2100 }
2101
2102 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2103 {
2104         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2105         type_t   *type = skip_typeref(expression->base.type);
2106
2107         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2108                 return expression_to_addr(expression->value);
2109
2110         const expression_t *value = expression->value;
2111
2112         switch(expression->base.kind) {
2113         case EXPR_UNARY_NEGATE: {
2114                 ir_node *value_node = expression_to_firm(value);
2115                 ir_mode *mode = get_ir_mode(type);
2116                 return new_d_Minus(dbgi, value_node, mode);
2117         }
2118         case EXPR_UNARY_PLUS:
2119                 return expression_to_firm(value);
2120         case EXPR_UNARY_BITWISE_NEGATE: {
2121                 ir_node *value_node = expression_to_firm(value);
2122                 ir_mode *mode = get_ir_mode(type);
2123                 return new_d_Not(dbgi, value_node, mode);
2124         }
2125         case EXPR_UNARY_NOT: {
2126                 ir_node *value_node = _expression_to_firm(value);
2127                 value_node          = create_conv(dbgi, value_node, mode_b);
2128                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2129                 return res;
2130         }
2131         case EXPR_UNARY_DEREFERENCE: {
2132                 ir_node *value_node = expression_to_firm(value);
2133                 type_t  *value_type = skip_typeref(value->base.type);
2134                 assert(is_type_pointer(value_type));
2135                 type_t  *points_to  = value_type->pointer.points_to;
2136                 return deref_address(dbgi, points_to, value_node);
2137         }
2138         case EXPR_UNARY_POSTFIX_INCREMENT:
2139         case EXPR_UNARY_POSTFIX_DECREMENT:
2140         case EXPR_UNARY_PREFIX_INCREMENT:
2141         case EXPR_UNARY_PREFIX_DECREMENT:
2142                 return create_incdec(expression);
2143         case EXPR_UNARY_CAST: {
2144                 ir_node *value_node = expression_to_firm(value);
2145                 if (is_type_scalar(type)) {
2146                         ir_mode *mode = get_ir_mode(type);
2147                         ir_node *node = create_conv(dbgi, value_node, mode);
2148                         node = do_strict_conv(dbgi, node);
2149                         return node;
2150                 } else {
2151                         /* make sure firm type is constructed */
2152                         (void) get_ir_type(type);
2153                         return value_node;
2154                 }
2155         }
2156         case EXPR_UNARY_CAST_IMPLICIT: {
2157                 ir_node *value_node = expression_to_firm(value);
2158                 if (is_type_scalar(type)) {
2159                         ir_mode *mode = get_ir_mode(type);
2160                         return create_conv(dbgi, value_node, mode);
2161                 } else {
2162                         return value_node;
2163                 }
2164         }
2165         case EXPR_UNARY_ASSUME:
2166                 if (firm_opt.confirm)
2167                         return handle_assume(dbgi, value);
2168                 else
2169                         return NULL;
2170
2171         default:
2172                 break;
2173         }
2174         panic("invalid UNEXPR type found");
2175 }
2176
2177 /**
2178  * produces a 0/1 depending of the value of a mode_b node
2179  */
2180 static ir_node *produce_condition_result(const expression_t *expression,
2181                                          dbg_info *dbgi)
2182 {
2183         ir_mode *mode      = get_ir_mode(expression->base.type);
2184         ir_node *cur_block = get_cur_block();
2185
2186         ir_node *one_block = new_immBlock();
2187         ir_node *one       = new_Const(mode, get_mode_one(mode));
2188         ir_node *jmp_one   = new_d_Jmp(dbgi);
2189
2190         ir_node *zero_block = new_immBlock();
2191         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2192         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2193
2194         set_cur_block(cur_block);
2195         create_condition_evaluation(expression, one_block, zero_block);
2196         mature_immBlock(one_block);
2197         mature_immBlock(zero_block);
2198
2199         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2200         new_Block(2, in_cf);
2201
2202         ir_node *in[2] = { one, zero };
2203         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2204
2205         return val;
2206 }
2207
2208 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2209                 ir_node *value, type_t *type)
2210 {
2211         pointer_type_t *const pointer_type = &type->pointer;
2212         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2213         unsigned              elem_size    = get_type_size_const(points_to);
2214
2215         /* gcc extension: allow arithmetic with void * and function * */
2216         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2217             is_type_function(points_to))  {
2218                 elem_size = 1;
2219         }
2220
2221         assert(elem_size >= 1);
2222         if (elem_size == 1)
2223                 return value;
2224
2225         value = create_conv(dbgi, value, mode_int);
2226         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2227         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2228         return mul;
2229 }
2230
2231 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2232                           ir_node *left, ir_node *right)
2233 {
2234         ir_mode  *mode;
2235         type_t   *type_left  = skip_typeref(expression->left->base.type);
2236         type_t   *type_right = skip_typeref(expression->right->base.type);
2237
2238         expression_kind_t kind = expression->base.kind;
2239
2240         switch (kind) {
2241         case EXPR_BINARY_SHIFTLEFT:
2242         case EXPR_BINARY_SHIFTRIGHT:
2243         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2244         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2245                 mode  = get_irn_mode(left);
2246                 right = create_conv(dbgi, right, mode_uint);
2247                 break;
2248
2249         case EXPR_BINARY_SUB:
2250                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2251                         const pointer_type_t *const ptr_type = &type_left->pointer;
2252
2253                         mode = get_ir_mode(expression->base.type);
2254                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2255                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2256                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2257                         ir_node *const no_mem    = new_NoMem();
2258                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2259                                                                                                    mode, op_pin_state_floats);
2260                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2261                 }
2262                 /* fallthrough */
2263         case EXPR_BINARY_SUB_ASSIGN:
2264                 if (is_type_pointer(type_left)) {
2265                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2266                         mode  = get_ir_mode(type_left);
2267                         break;
2268                 }
2269                 goto normal_node;
2270
2271         case EXPR_BINARY_ADD:
2272         case EXPR_BINARY_ADD_ASSIGN:
2273                 if (is_type_pointer(type_left)) {
2274                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2275                         mode  = get_ir_mode(type_left);
2276                         break;
2277                 } else if (is_type_pointer(type_right)) {
2278                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2279                         mode  = get_ir_mode(type_right);
2280                         break;
2281                 }
2282                 goto normal_node;
2283
2284         default:
2285 normal_node:
2286                 mode = get_irn_mode(right);
2287                 left = create_conv(dbgi, left, mode);
2288                 break;
2289         }
2290
2291         switch (kind) {
2292         case EXPR_BINARY_ADD_ASSIGN:
2293         case EXPR_BINARY_ADD:
2294                 return new_d_Add(dbgi, left, right, mode);
2295         case EXPR_BINARY_SUB_ASSIGN:
2296         case EXPR_BINARY_SUB:
2297                 return new_d_Sub(dbgi, left, right, mode);
2298         case EXPR_BINARY_MUL_ASSIGN:
2299         case EXPR_BINARY_MUL:
2300                 return new_d_Mul(dbgi, left, right, mode);
2301         case EXPR_BINARY_BITWISE_AND:
2302         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2303                 return new_d_And(dbgi, left, right, mode);
2304         case EXPR_BINARY_BITWISE_OR:
2305         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2306                 return new_d_Or(dbgi, left, right, mode);
2307         case EXPR_BINARY_BITWISE_XOR:
2308         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2309                 return new_d_Eor(dbgi, left, right, mode);
2310         case EXPR_BINARY_SHIFTLEFT:
2311         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2312                 return new_d_Shl(dbgi, left, right, mode);
2313         case EXPR_BINARY_SHIFTRIGHT:
2314         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2315                 if (mode_is_signed(mode)) {
2316                         return new_d_Shrs(dbgi, left, right, mode);
2317                 } else {
2318                         return new_d_Shr(dbgi, left, right, mode);
2319                 }
2320         case EXPR_BINARY_DIV:
2321         case EXPR_BINARY_DIV_ASSIGN: {
2322                 ir_node *pin = new_Pin(new_NoMem());
2323                 ir_node *op;
2324                 ir_node *res;
2325                 if (mode_is_float(mode)) {
2326                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2327                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2328                 } else {
2329                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2330                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2331                 }
2332                 return res;
2333         }
2334         case EXPR_BINARY_MOD:
2335         case EXPR_BINARY_MOD_ASSIGN: {
2336                 ir_node *pin = new_Pin(new_NoMem());
2337                 assert(!mode_is_float(mode));
2338                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2339                                          op_pin_state_floats);
2340                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2341                 return res;
2342         }
2343         default:
2344                 panic("unexpected expression kind");
2345         }
2346 }
2347
2348 static ir_node *create_lazy_op(const binary_expression_t *expression)
2349 {
2350         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2351         type_t   *type = expression->base.type;
2352         ir_mode  *mode = get_ir_mode(type);
2353
2354         if (is_constant_expression(expression->left)) {
2355                 long val = fold_constant(expression->left);
2356                 expression_kind_t ekind = expression->base.kind;
2357                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2358                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2359                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2360                         return expression_to_firm(expression->right);
2361                 } else {
2362                         return new_Const(mode, get_mode_one(mode));
2363                 }
2364         }
2365
2366         return produce_condition_result((const expression_t*) expression, dbgi);
2367 }
2368
2369 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2370                                             ir_node *right, ir_mode *mode);
2371
2372 static ir_node *create_assign_binop(const binary_expression_t *expression)
2373 {
2374         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2375         const expression_t *left_expr = expression->left;
2376         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2377         ir_node            *right     = expression_to_firm(expression->right);
2378         ir_node            *left_addr = expression_to_addr(left_expr);
2379         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2380         ir_node            *result    = create_op(dbgi, expression, left, right);
2381
2382         result = create_conv(dbgi, result, left_mode);
2383         result = do_strict_conv(dbgi, result);
2384
2385         set_value_for_expression_addr(left_expr, result, left_addr);
2386
2387         return result;
2388 }
2389
2390 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2391 {
2392         expression_kind_t kind = expression->base.kind;
2393
2394         switch(kind) {
2395         case EXPR_BINARY_EQUAL:
2396         case EXPR_BINARY_NOTEQUAL:
2397         case EXPR_BINARY_LESS:
2398         case EXPR_BINARY_LESSEQUAL:
2399         case EXPR_BINARY_GREATER:
2400         case EXPR_BINARY_GREATEREQUAL:
2401         case EXPR_BINARY_ISGREATER:
2402         case EXPR_BINARY_ISGREATEREQUAL:
2403         case EXPR_BINARY_ISLESS:
2404         case EXPR_BINARY_ISLESSEQUAL:
2405         case EXPR_BINARY_ISLESSGREATER:
2406         case EXPR_BINARY_ISUNORDERED: {
2407                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2408                 ir_node *left  = expression_to_firm(expression->left);
2409                 ir_node *right = expression_to_firm(expression->right);
2410                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2411                 long     pnc   = get_pnc(kind, expression->left->base.type);
2412                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2413                 return proj;
2414         }
2415         case EXPR_BINARY_ASSIGN: {
2416                 ir_node *addr  = expression_to_addr(expression->left);
2417                 ir_node *right = expression_to_firm(expression->right);
2418                 set_value_for_expression_addr(expression->left, right, addr);
2419
2420                 return right;
2421         }
2422         case EXPR_BINARY_ADD:
2423         case EXPR_BINARY_SUB:
2424         case EXPR_BINARY_MUL:
2425         case EXPR_BINARY_DIV:
2426         case EXPR_BINARY_MOD:
2427         case EXPR_BINARY_BITWISE_AND:
2428         case EXPR_BINARY_BITWISE_OR:
2429         case EXPR_BINARY_BITWISE_XOR:
2430         case EXPR_BINARY_SHIFTLEFT:
2431         case EXPR_BINARY_SHIFTRIGHT:
2432         {
2433                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2434                 ir_node  *left  = expression_to_firm(expression->left);
2435                 ir_node  *right = expression_to_firm(expression->right);
2436                 return create_op(dbgi, expression, left, right);
2437         }
2438         case EXPR_BINARY_LOGICAL_AND:
2439         case EXPR_BINARY_LOGICAL_OR:
2440                 return create_lazy_op(expression);
2441         case EXPR_BINARY_COMMA:
2442                 /* create side effects of left side */
2443                 (void) expression_to_firm(expression->left);
2444                 return _expression_to_firm(expression->right);
2445
2446         case EXPR_BINARY_ADD_ASSIGN:
2447         case EXPR_BINARY_SUB_ASSIGN:
2448         case EXPR_BINARY_MUL_ASSIGN:
2449         case EXPR_BINARY_MOD_ASSIGN:
2450         case EXPR_BINARY_DIV_ASSIGN:
2451         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2452         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2453         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2454         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2455         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2456                 return create_assign_binop(expression);
2457         case EXPR_BINARY_BUILTIN_EXPECT:
2458                 return _expression_to_firm(expression->left);
2459         default:
2460                 panic("TODO binexpr type");
2461         }
2462 }
2463
2464 static ir_node *array_access_addr(const array_access_expression_t *expression)
2465 {
2466         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2467         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2468         ir_node  *offset    = expression_to_firm(expression->index);
2469
2470         type_t  *offset_type = skip_typeref(expression->index->base.type);
2471         ir_mode *mode;
2472         if (is_type_signed(offset_type)) {
2473                 mode = get_ir_mode(type_ssize_t);
2474         } else {
2475                 mode = get_ir_mode(type_size_t);
2476         }
2477         offset = create_conv(dbgi, offset, mode);
2478
2479         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2480         assert(is_type_pointer(ref_type));
2481         pointer_type_t *pointer_type = &ref_type->pointer;
2482
2483         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2484         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2485         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2486                                              mode);
2487         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2488
2489         return result;
2490 }
2491
2492 static ir_node *array_access_to_firm(
2493                 const array_access_expression_t *expression)
2494 {
2495         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2496         ir_node  *addr   = array_access_addr(expression);
2497         type_t   *type   = revert_automatic_type_conversion(
2498                         (const expression_t*) expression);
2499         type             = skip_typeref(type);
2500
2501         return deref_address(dbgi, type, addr);
2502 }
2503
2504 static long get_offsetof_offset(const offsetof_expression_t *expression)
2505 {
2506         type_t *orig_type = expression->type;
2507         long    offset    = 0;
2508
2509         designator_t *designator = expression->designator;
2510         for ( ; designator != NULL; designator = designator->next) {
2511                 type_t *type = skip_typeref(orig_type);
2512                 /* be sure the type is constructed */
2513                 (void) get_ir_type(type);
2514
2515                 if (designator->symbol != NULL) {
2516                         assert(is_type_compound(type));
2517                         symbol_t *symbol = designator->symbol;
2518
2519                         compound_t *compound = type->compound.compound;
2520                         entity_t   *iter     = compound->members.entities;
2521                         for ( ; iter != NULL; iter = iter->base.next) {
2522                                 if (iter->base.symbol == symbol) {
2523                                         break;
2524                                 }
2525                         }
2526                         assert(iter != NULL);
2527
2528                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2529                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2530                         offset += get_entity_offset(iter->compound_member.entity);
2531
2532                         orig_type = iter->declaration.type;
2533                 } else {
2534                         expression_t *array_index = designator->array_index;
2535                         assert(designator->array_index != NULL);
2536                         assert(is_type_array(type));
2537
2538                         long index         = fold_constant(array_index);
2539                         ir_type *arr_type  = get_ir_type(type);
2540                         ir_type *elem_type = get_array_element_type(arr_type);
2541                         long     elem_size = get_type_size_bytes(elem_type);
2542
2543                         offset += index * elem_size;
2544
2545                         orig_type = type->array.element_type;
2546                 }
2547         }
2548
2549         return offset;
2550 }
2551
2552 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2553 {
2554         ir_mode  *mode   = get_ir_mode(expression->base.type);
2555         long      offset = get_offsetof_offset(expression);
2556         tarval   *tv     = new_tarval_from_long(offset, mode);
2557         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2558
2559         return new_d_Const(dbgi, mode, tv);
2560 }
2561
2562 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2563                                      ir_entity *entity, type_t *type);
2564
2565 static ir_node *compound_literal_to_firm(
2566                 const compound_literal_expression_t *expression)
2567 {
2568         type_t *type = expression->type;
2569
2570         /* create an entity on the stack */
2571         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2572
2573         ident     *const id     = id_unique("CompLit.%u");
2574         ir_type   *const irtype = get_ir_type(type);
2575         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2576         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2577         set_entity_ld_ident(entity, id);
2578
2579         set_entity_variability(entity, variability_uninitialized);
2580
2581         /* create initialisation code */
2582         initializer_t *initializer = expression->initializer;
2583         create_local_initializer(initializer, dbgi, entity, type);
2584
2585         /* create a sel for the compound literal address */
2586         ir_node *frame = get_local_frame(entity);
2587         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2588         return sel;
2589 }
2590
2591 /**
2592  * Transform a sizeof expression into Firm code.
2593  */
2594 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2595 {
2596         type_t *type = expression->type;
2597         if (type == NULL) {
2598                 type = expression->tp_expression->base.type;
2599                 assert(type != NULL);
2600         }
2601
2602         type = skip_typeref(type);
2603         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2604         if (is_type_array(type) && type->array.is_vla
2605                         && expression->tp_expression != NULL) {
2606                 expression_to_firm(expression->tp_expression);
2607         }
2608
2609         return get_type_size(type);
2610 }
2611
2612 /**
2613  * Transform an alignof expression into Firm code.
2614  */
2615 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2616 {
2617         type_t *type = expression->type;
2618         if (type == NULL) {
2619                 /* beware: if expression is a variable reference, return the
2620                    alignment of the variable. */
2621                 const expression_t *tp_expression = expression->tp_expression;
2622                 const entity_t     *entity        = expression_is_variable(tp_expression);
2623                 if (entity != NULL) {
2624                         /* TODO: get the alignment of this variable. */
2625                         (void) entity;
2626                 }
2627                 type = tp_expression->base.type;
2628                 assert(type != NULL);
2629         }
2630
2631         ir_mode *const mode = get_ir_mode(expression->base.type);
2632         symconst_symbol sym;
2633         sym.type_p = get_ir_type(type);
2634         return new_SymConst(mode, sym, symconst_type_align);
2635 }
2636
2637 static void init_ir_types(void);
2638
2639 long fold_constant(const expression_t *expression)
2640 {
2641         assert(is_type_valid(skip_typeref(expression->base.type)));
2642
2643         bool constant_folding_old = constant_folding;
2644         constant_folding = true;
2645
2646         init_ir_types();
2647
2648         assert(is_constant_expression(expression));
2649
2650         ir_graph *old_current_ir_graph = current_ir_graph;
2651         if (current_ir_graph == NULL) {
2652                 current_ir_graph = get_const_code_irg();
2653         }
2654
2655         ir_node *cnst = expression_to_firm(expression);
2656         current_ir_graph = old_current_ir_graph;
2657
2658         if (!is_Const(cnst)) {
2659                 panic("couldn't fold constant\n");
2660         }
2661
2662         tarval *tv = get_Const_tarval(cnst);
2663         if (!tarval_is_long(tv)) {
2664                 panic("result of constant folding is not integer\n");
2665         }
2666
2667         constant_folding = constant_folding_old;
2668
2669         return get_tarval_long(tv);
2670 }
2671
2672 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2673 {
2674         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2675
2676         /* first try to fold a constant condition */
2677         if (is_constant_expression(expression->condition)) {
2678                 long val = fold_constant(expression->condition);
2679                 if (val) {
2680                         expression_t *true_expression = expression->true_expression;
2681                         if (true_expression == NULL)
2682                                 true_expression = expression->condition;
2683                         return expression_to_firm(true_expression);
2684                 } else {
2685                         return expression_to_firm(expression->false_expression);
2686                 }
2687         }
2688
2689         ir_node *cur_block   = get_cur_block();
2690
2691         /* create the true block */
2692         ir_node *true_block  = new_immBlock();
2693
2694         ir_node *true_val = expression->true_expression != NULL ?
2695                 expression_to_firm(expression->true_expression) : NULL;
2696         ir_node *true_jmp = new_Jmp();
2697
2698         /* create the false block */
2699         ir_node *false_block = new_immBlock();
2700
2701         ir_node *false_val = expression_to_firm(expression->false_expression);
2702         ir_node *false_jmp = new_Jmp();
2703
2704         /* create the condition evaluation */
2705         set_cur_block(cur_block);
2706         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2707         if (expression->true_expression == NULL) {
2708                 if (cond_expr != NULL) {
2709                         true_val = cond_expr;
2710                 } else {
2711                         /* Condition ended with a short circuit (&&, ||, !) operation.
2712                          * Generate a "1" as value for the true branch. */
2713                         ir_mode *const mode = mode_Is;
2714                         true_val = new_Const(mode, get_mode_one(mode));
2715                 }
2716         }
2717         mature_immBlock(true_block);
2718         mature_immBlock(false_block);
2719
2720         /* create the common block */
2721         ir_node *in_cf[2] = { true_jmp, false_jmp };
2722         new_Block(2, in_cf);
2723
2724         /* TODO improve static semantics, so either both or no values are NULL */
2725         if (true_val == NULL || false_val == NULL)
2726                 return NULL;
2727
2728         ir_node *in[2] = { true_val, false_val };
2729         ir_mode *mode  = get_irn_mode(true_val);
2730         assert(get_irn_mode(false_val) == mode);
2731         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2732
2733         return val;
2734 }
2735
2736 /**
2737  * Returns an IR-node representing the address of a field.
2738  */
2739 static ir_node *select_addr(const select_expression_t *expression)
2740 {
2741         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2742
2743         construct_select_compound(expression);
2744
2745         ir_node *compound_addr = expression_to_firm(expression->compound);
2746
2747         entity_t *entry = expression->compound_entry;
2748         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2749         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2750         ir_entity *irentity = entry->compound_member.entity;
2751
2752         assert(irentity != NULL);
2753
2754         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2755
2756         return sel;
2757 }
2758
2759 static ir_node *select_to_firm(const select_expression_t *expression)
2760 {
2761         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2762         ir_node  *addr = select_addr(expression);
2763         type_t   *type = revert_automatic_type_conversion(
2764                         (const expression_t*) expression);
2765         type           = skip_typeref(type);
2766
2767         entity_t *entry      = expression->compound_entry;
2768         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2769         type_t   *entry_type = skip_typeref(entry->declaration.type);
2770
2771         if (entry_type->kind == TYPE_BITFIELD) {
2772                 return bitfield_extract_to_firm(expression, addr);
2773         }
2774
2775         return deref_address(dbgi, type, addr);
2776 }
2777
2778 /* Values returned by __builtin_classify_type. */
2779 typedef enum gcc_type_class
2780 {
2781         no_type_class = -1,
2782         void_type_class,
2783         integer_type_class,
2784         char_type_class,
2785         enumeral_type_class,
2786         boolean_type_class,
2787         pointer_type_class,
2788         reference_type_class,
2789         offset_type_class,
2790         real_type_class,
2791         complex_type_class,
2792         function_type_class,
2793         method_type_class,
2794         record_type_class,
2795         union_type_class,
2796         array_type_class,
2797         string_type_class,
2798         set_type_class,
2799         file_type_class,
2800         lang_type_class
2801 } gcc_type_class;
2802
2803 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2804 {
2805         type_t *type = expr->type_expression->base.type;
2806
2807         /* FIXME gcc returns different values depending on whether compiling C or C++
2808          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2809         gcc_type_class tc;
2810         for (;;) {
2811                 type = skip_typeref(type);
2812                 switch (type->kind) {
2813                         case TYPE_ATOMIC: {
2814                                 const atomic_type_t *const atomic_type = &type->atomic;
2815                                 switch (atomic_type->akind) {
2816                                         /* should not be reached */
2817                                         case ATOMIC_TYPE_INVALID:
2818                                                 tc = no_type_class;
2819                                                 goto make_const;
2820
2821                                         /* gcc cannot do that */
2822                                         case ATOMIC_TYPE_VOID:
2823                                                 tc = void_type_class;
2824                                                 goto make_const;
2825
2826                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2827                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2828                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2829                                         case ATOMIC_TYPE_SHORT:
2830                                         case ATOMIC_TYPE_USHORT:
2831                                         case ATOMIC_TYPE_INT:
2832                                         case ATOMIC_TYPE_UINT:
2833                                         case ATOMIC_TYPE_LONG:
2834                                         case ATOMIC_TYPE_ULONG:
2835                                         case ATOMIC_TYPE_LONGLONG:
2836                                         case ATOMIC_TYPE_ULONGLONG:
2837                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2838                                                 tc = integer_type_class;
2839                                                 goto make_const;
2840
2841                                         case ATOMIC_TYPE_FLOAT:
2842                                         case ATOMIC_TYPE_DOUBLE:
2843                                         case ATOMIC_TYPE_LONG_DOUBLE:
2844                                                 tc = real_type_class;
2845                                                 goto make_const;
2846                                 }
2847                                 panic("Unexpected atomic type in classify_type_to_firm().");
2848                         }
2849
2850                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2851                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2852                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2853                         case TYPE_ARRAY:           /* gcc handles this as pointer */
2854                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
2855                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2856                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2857                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2858
2859                         /* gcc handles this as integer */
2860                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2861
2862                         /* gcc classifies the referenced type */
2863                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2864
2865                         case TYPE_BUILTIN:
2866                         /* typedef/typeof should be skipped already */
2867                         case TYPE_TYPEDEF:
2868                         case TYPE_TYPEOF:
2869                         case TYPE_INVALID:
2870                         case TYPE_ERROR:
2871                                 break;
2872                 }
2873                 panic("unexpected TYPE classify_type_to_firm().");
2874         }
2875
2876 make_const:;
2877         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2878         ir_mode  *const mode = mode_int;
2879         tarval   *const tv   = new_tarval_from_long(tc, mode);
2880         return new_d_Const(dbgi, mode, tv);
2881 }
2882
2883 static ir_node *function_name_to_firm(
2884                 const funcname_expression_t *const expr)
2885 {
2886         switch(expr->kind) {
2887         case FUNCNAME_FUNCTION:
2888         case FUNCNAME_PRETTY_FUNCTION:
2889         case FUNCNAME_FUNCDNAME:
2890                 if (current_function_name == NULL) {
2891                         const source_position_t *const src_pos = &expr->base.source_position;
2892                         const char    *name  = current_function_entity->base.symbol->string;
2893                         const string_t string = { name, strlen(name) + 1 };
2894                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2895                 }
2896                 return current_function_name;
2897         case FUNCNAME_FUNCSIG:
2898                 if (current_funcsig == NULL) {
2899                         const source_position_t *const src_pos = &expr->base.source_position;
2900                         ir_entity *ent = get_irg_entity(current_ir_graph);
2901                         const char *const name = get_entity_ld_name(ent);
2902                         const string_t string = { name, strlen(name) + 1 };
2903                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2904                 }
2905                 return current_funcsig;
2906         }
2907         panic("Unsupported function name");
2908 }
2909
2910 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2911 {
2912         statement_t *statement = expr->statement;
2913
2914         assert(statement->kind == STATEMENT_COMPOUND);
2915         return compound_statement_to_firm(&statement->compound);
2916 }
2917
2918 static ir_node *va_start_expression_to_firm(
2919         const va_start_expression_t *const expr)
2920 {
2921         type_t    *const type        = current_function_entity->declaration.type;
2922         ir_type   *const method_type = get_ir_type(type);
2923         int        const n           = get_method_n_params(method_type) - 1;
2924         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2925         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2926         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2927         ir_node   *const no_mem      = new_NoMem();
2928         ir_node   *const arg_sel     =
2929                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2930
2931         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
2932         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2933         set_value_for_expression(expr->ap, add);
2934
2935         return NULL;
2936 }
2937
2938 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2939 {
2940         type_t       *const type    = expr->base.type;
2941         expression_t *const ap_expr = expr->ap;
2942         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2943         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2944         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2945         ir_node      *const res     = deref_address(dbgi, type, ap);
2946
2947         ir_node      *const cnst    = get_type_size(expr->base.type);
2948         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2949
2950         set_value_for_expression_addr(ap_expr, add, ap_addr);
2951
2952         return res;
2953 }
2954
2955 static ir_node *dereference_addr(const unary_expression_t *const expression)
2956 {
2957         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2958         return expression_to_firm(expression->value);
2959 }
2960
2961 /**
2962  * Returns a IR-node representing an lvalue of the given expression.
2963  */
2964 static ir_node *expression_to_addr(const expression_t *expression)
2965 {
2966         switch(expression->kind) {
2967         case EXPR_REFERENCE:
2968                 return reference_addr(&expression->reference);
2969         case EXPR_ARRAY_ACCESS:
2970                 return array_access_addr(&expression->array_access);
2971         case EXPR_SELECT:
2972                 return select_addr(&expression->select);
2973         case EXPR_CALL:
2974                 return call_expression_to_firm(&expression->call);
2975         case EXPR_UNARY_DEREFERENCE: {
2976                 return dereference_addr(&expression->unary);
2977         }
2978         default:
2979                 break;
2980         }
2981         panic("trying to get address of non-lvalue");
2982 }
2983
2984 static ir_node *builtin_constant_to_firm(
2985                 const builtin_constant_expression_t *expression)
2986 {
2987         ir_mode *mode = get_ir_mode(expression->base.type);
2988         long     v;
2989
2990         if (is_constant_expression(expression->value)) {
2991                 v = 1;
2992         } else {
2993                 v = 0;
2994         }
2995         return new_Const_long(mode, v);
2996 }
2997
2998 static ir_node *builtin_prefetch_to_firm(
2999                 const builtin_prefetch_expression_t *expression)
3000 {
3001         ir_node *adr = expression_to_firm(expression->adr);
3002         /* no Firm support for prefetch yet */
3003         (void) adr;
3004         return NULL;
3005 }
3006
3007 static ir_node *get_label_block(label_t *label)
3008 {
3009         if (label->block != NULL)
3010                 return label->block;
3011
3012         /* beware: might be called from create initializer with current_ir_graph
3013          * set to const_code_irg. */
3014         ir_graph *rem    = current_ir_graph;
3015         current_ir_graph = current_function;
3016
3017         ir_node *old_cur_block = get_cur_block();
3018         ir_node *block         = new_immBlock();
3019         set_cur_block(old_cur_block);
3020
3021         label->block = block;
3022
3023         ARR_APP1(label_t *, all_labels, label);
3024
3025         current_ir_graph = rem;
3026         return block;
3027 }
3028
3029 /**
3030  * Pointer to a label.  This is used for the
3031  * GNU address-of-label extension.
3032  */
3033 static ir_node *label_address_to_firm(
3034                 const label_address_expression_t *label)
3035 {
3036         ir_node    *block = get_label_block(label->label);
3037         ir_label_t  nr    = get_Block_label(block);
3038
3039         if (nr == 0) {
3040                 nr = get_irp_next_label_nr();
3041                 set_Block_label(block, nr);
3042         }
3043         symconst_symbol value;
3044         value.label = nr;
3045         return new_SymConst(mode_P_code, value, symconst_label);
3046 }
3047
3048 /**
3049  * creates firm nodes for an expression. The difference between this function
3050  * and expression_to_firm is, that this version might produce mode_b nodes
3051  * instead of mode_Is.
3052  */
3053 static ir_node *_expression_to_firm(const expression_t *expression)
3054 {
3055 #ifndef NDEBUG
3056         if (!constant_folding) {
3057                 assert(!expression->base.transformed);
3058                 ((expression_t*) expression)->base.transformed = true;
3059         }
3060 #endif
3061
3062         switch (expression->kind) {
3063         case EXPR_CHARACTER_CONSTANT:
3064                 return character_constant_to_firm(&expression->conste);
3065         case EXPR_WIDE_CHARACTER_CONSTANT:
3066                 return wide_character_constant_to_firm(&expression->conste);
3067         case EXPR_CONST:
3068                 return const_to_firm(&expression->conste);
3069         case EXPR_STRING_LITERAL:
3070                 return string_literal_to_firm(&expression->string);
3071         case EXPR_WIDE_STRING_LITERAL:
3072                 return wide_string_literal_to_firm(&expression->wide_string);
3073         case EXPR_REFERENCE:
3074                 return reference_expression_to_firm(&expression->reference);
3075         case EXPR_REFERENCE_ENUM_VALUE:
3076                 return reference_expression_enum_value_to_firm(&expression->reference);
3077         case EXPR_CALL:
3078                 return call_expression_to_firm(&expression->call);
3079         EXPR_UNARY_CASES
3080                 return unary_expression_to_firm(&expression->unary);
3081         EXPR_BINARY_CASES
3082                 return binary_expression_to_firm(&expression->binary);
3083         case EXPR_ARRAY_ACCESS:
3084                 return array_access_to_firm(&expression->array_access);
3085         case EXPR_SIZEOF:
3086                 return sizeof_to_firm(&expression->typeprop);
3087         case EXPR_ALIGNOF:
3088                 return alignof_to_firm(&expression->typeprop);
3089         case EXPR_CONDITIONAL:
3090                 return conditional_to_firm(&expression->conditional);
3091         case EXPR_SELECT:
3092                 return select_to_firm(&expression->select);
3093         case EXPR_CLASSIFY_TYPE:
3094                 return classify_type_to_firm(&expression->classify_type);
3095         case EXPR_FUNCNAME:
3096                 return function_name_to_firm(&expression->funcname);
3097         case EXPR_STATEMENT:
3098                 return statement_expression_to_firm(&expression->statement);
3099         case EXPR_VA_START:
3100                 return va_start_expression_to_firm(&expression->va_starte);
3101         case EXPR_VA_ARG:
3102                 return va_arg_expression_to_firm(&expression->va_arge);
3103         case EXPR_BUILTIN_SYMBOL:
3104                 panic("unimplemented expression found");
3105         case EXPR_BUILTIN_CONSTANT_P:
3106                 return builtin_constant_to_firm(&expression->builtin_constant);
3107         case EXPR_BUILTIN_PREFETCH:
3108                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3109         case EXPR_OFFSETOF:
3110                 return offsetof_to_firm(&expression->offsetofe);
3111         case EXPR_COMPOUND_LITERAL:
3112                 return compound_literal_to_firm(&expression->compound_literal);
3113         case EXPR_LABEL_ADDRESS:
3114                 return label_address_to_firm(&expression->label_address);
3115
3116         case EXPR_UNKNOWN:
3117         case EXPR_INVALID:
3118                 break;
3119         }
3120         panic("invalid expression found");
3121 }
3122
3123 static bool produces_mode_b(const expression_t *expression)
3124 {
3125         switch (expression->kind) {
3126         case EXPR_BINARY_EQUAL:
3127         case EXPR_BINARY_NOTEQUAL:
3128         case EXPR_BINARY_LESS:
3129         case EXPR_BINARY_LESSEQUAL:
3130         case EXPR_BINARY_GREATER:
3131         case EXPR_BINARY_GREATEREQUAL:
3132         case EXPR_BINARY_ISGREATER:
3133         case EXPR_BINARY_ISGREATEREQUAL:
3134         case EXPR_BINARY_ISLESS:
3135         case EXPR_BINARY_ISLESSEQUAL:
3136         case EXPR_BINARY_ISLESSGREATER:
3137         case EXPR_BINARY_ISUNORDERED:
3138         case EXPR_UNARY_NOT:
3139                 return true;
3140
3141         case EXPR_BINARY_BUILTIN_EXPECT:
3142                 return produces_mode_b(expression->binary.left);
3143         case EXPR_BINARY_COMMA:
3144                 return produces_mode_b(expression->binary.right);
3145
3146         default:
3147                 return false;
3148         }
3149 }
3150
3151 static ir_node *expression_to_firm(const expression_t *expression)
3152 {
3153         if (!produces_mode_b(expression)) {
3154                 ir_node *res = _expression_to_firm(expression);
3155                 assert(res == NULL || get_irn_mode(res) != mode_b);
3156                 return res;
3157         }
3158
3159         if (is_constant_expression(expression)) {
3160                 ir_node *res  = _expression_to_firm(expression);
3161                 ir_mode *mode = get_ir_mode(expression->base.type);
3162                 assert(is_Const(res));
3163                 if (is_Const_null(res)) {
3164                         return new_Const_long(mode, 0);
3165                 } else {
3166                         return new_Const_long(mode, 1);
3167                 }
3168         }
3169
3170         /* we have to produce a 0/1 from the mode_b expression */
3171         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3172         return produce_condition_result(expression, dbgi);
3173 }
3174
3175 /**
3176  * create a short-circuit expression evaluation that tries to construct
3177  * efficient control flow structures for &&, || and ! expressions
3178  */
3179 static ir_node *create_condition_evaluation(const expression_t *expression,
3180                                             ir_node *true_block,
3181                                             ir_node *false_block)
3182 {
3183         switch(expression->kind) {
3184         case EXPR_UNARY_NOT: {
3185                 const unary_expression_t *unary_expression = &expression->unary;
3186                 create_condition_evaluation(unary_expression->value, false_block,
3187                                             true_block);
3188                 return NULL;
3189         }
3190         case EXPR_BINARY_LOGICAL_AND: {
3191                 const binary_expression_t *binary_expression = &expression->binary;
3192
3193                 ir_node *cur_block   = get_cur_block();
3194                 ir_node *extra_block = new_immBlock();
3195                 set_cur_block(cur_block);
3196                 create_condition_evaluation(binary_expression->left, extra_block,
3197                                             false_block);
3198                 mature_immBlock(extra_block);
3199                 set_cur_block(extra_block);
3200                 create_condition_evaluation(binary_expression->right, true_block,
3201                                             false_block);
3202                 return NULL;
3203         }
3204         case EXPR_BINARY_LOGICAL_OR: {
3205                 const binary_expression_t *binary_expression = &expression->binary;
3206
3207                 ir_node *cur_block   = get_cur_block();
3208                 ir_node *extra_block = new_immBlock();
3209                 set_cur_block(cur_block);
3210                 create_condition_evaluation(binary_expression->left, true_block,
3211                                             extra_block);
3212                 mature_immBlock(extra_block);
3213                 set_cur_block(extra_block);
3214                 create_condition_evaluation(binary_expression->right, true_block,
3215                                             false_block);
3216                 return NULL;
3217         }
3218         default:
3219                 break;
3220         }
3221
3222         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3223         ir_node  *cond_expr  = _expression_to_firm(expression);
3224         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3225         ir_node  *cond       = new_d_Cond(dbgi, condition);
3226         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3227         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3228
3229         /* set branch prediction info based on __builtin_expect */
3230         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3231                 long               cnst = fold_constant(expression->binary.right);
3232                 cond_jmp_predicate pred;
3233
3234                 if (cnst == 0) {
3235                         pred = COND_JMP_PRED_FALSE;
3236                 } else {
3237                         pred = COND_JMP_PRED_TRUE;
3238                 }
3239                 set_Cond_jmp_pred(cond, pred);
3240         }
3241
3242         add_immBlock_pred(true_block, true_proj);
3243         if (false_block != NULL) {
3244                 add_immBlock_pred(false_block, false_proj);
3245         }
3246
3247         set_cur_block(NULL);
3248         return cond_expr;
3249 }
3250
3251
3252 static void create_variable_entity(entity_t *variable,
3253                                    declaration_kind_t declaration_kind,
3254                                    ir_type *parent_type)
3255 {
3256         assert(variable->kind == ENTITY_VARIABLE);
3257         type_t    *const type     = skip_typeref(variable->declaration.type);
3258         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3259         ir_type   *const irtype   = get_ir_type(type);
3260         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3261         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3262
3263         handle_gnu_attributes_ent(irentity, variable);
3264
3265         variable->declaration.kind  = (unsigned char) declaration_kind;
3266         variable->variable.v.entity = irentity;
3267         set_entity_variability(irentity, variability_uninitialized);
3268         set_entity_ld_ident(irentity, create_ld_ident(variable));
3269         if (parent_type == get_tls_type())
3270                 set_entity_allocation(irentity, allocation_automatic);
3271         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3272                 set_entity_allocation(irentity, allocation_static);
3273
3274         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3275                 set_entity_volatility(irentity, volatility_is_volatile);
3276         }
3277 }
3278
3279
3280 typedef struct type_path_entry_t type_path_entry_t;
3281 struct type_path_entry_t {
3282         type_t           *type;
3283         ir_initializer_t *initializer;
3284         size_t            index;
3285         entity_t         *compound_entry;
3286 };
3287
3288 typedef struct type_path_t type_path_t;
3289 struct type_path_t {
3290         type_path_entry_t *path;
3291         type_t            *top_type;
3292         bool               invalid;
3293 };
3294
3295 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3296 {
3297         size_t len = ARR_LEN(path->path);
3298
3299         for (size_t i = 0; i < len; ++i) {
3300                 const type_path_entry_t *entry = & path->path[i];
3301
3302                 type_t *type = skip_typeref(entry->type);
3303                 if (is_type_compound(type)) {
3304                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3305                 } else if (is_type_array(type)) {
3306                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3307                 } else {
3308                         fprintf(stderr, "-INVALID-");
3309                 }
3310         }
3311         fprintf(stderr, "  (");
3312         print_type(path->top_type);
3313         fprintf(stderr, ")");
3314 }
3315
3316 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3317 {
3318         size_t len = ARR_LEN(path->path);
3319         assert(len > 0);
3320         return & path->path[len-1];
3321 }
3322
3323 static type_path_entry_t *append_to_type_path(type_path_t *path)
3324 {
3325         size_t len = ARR_LEN(path->path);
3326         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3327
3328         type_path_entry_t *result = & path->path[len];
3329         memset(result, 0, sizeof(result[0]));
3330         return result;
3331 }
3332
3333 static size_t get_compound_member_count(const compound_type_t *type)
3334 {
3335         compound_t *compound  = type->compound;
3336         size_t      n_members = 0;
3337         entity_t   *member    = compound->members.entities;
3338         for ( ; member != NULL; member = member->base.next) {
3339                 ++n_members;
3340         }
3341
3342         return n_members;
3343 }
3344
3345 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3346 {
3347         type_t *orig_top_type = path->top_type;
3348         type_t *top_type      = skip_typeref(orig_top_type);
3349
3350         assert(is_type_compound(top_type) || is_type_array(top_type));
3351
3352         if (ARR_LEN(path->path) == 0) {
3353                 return NULL;
3354         } else {
3355                 type_path_entry_t *top         = get_type_path_top(path);
3356                 ir_initializer_t  *initializer = top->initializer;
3357                 return get_initializer_compound_value(initializer, top->index);
3358         }
3359 }
3360
3361 static void descend_into_subtype(type_path_t *path)
3362 {
3363         type_t *orig_top_type = path->top_type;
3364         type_t *top_type      = skip_typeref(orig_top_type);
3365
3366         assert(is_type_compound(top_type) || is_type_array(top_type));
3367
3368         ir_initializer_t *initializer = get_initializer_entry(path);
3369
3370         type_path_entry_t *top = append_to_type_path(path);
3371         top->type              = top_type;
3372
3373         size_t len;
3374
3375         if (is_type_compound(top_type)) {
3376                 compound_t *compound = top_type->compound.compound;
3377                 entity_t   *entry    = compound->members.entities;
3378
3379                 top->compound_entry = entry;
3380                 top->index          = 0;
3381                 len                 = get_compound_member_count(&top_type->compound);
3382                 if (entry != NULL) {
3383                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3384                         path->top_type = entry->declaration.type;
3385                 }
3386         } else {
3387                 assert(is_type_array(top_type));
3388                 assert(top_type->array.size > 0);
3389
3390                 top->index     = 0;
3391                 path->top_type = top_type->array.element_type;
3392                 len            = top_type->array.size;
3393         }
3394         if (initializer == NULL
3395                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3396                 initializer = create_initializer_compound(len);
3397                 /* we have to set the entry at the 2nd latest path entry... */
3398                 size_t path_len = ARR_LEN(path->path);
3399                 assert(path_len >= 1);
3400                 if (path_len > 1) {
3401                         type_path_entry_t *entry        = & path->path[path_len-2];
3402                         ir_initializer_t  *tinitializer = entry->initializer;
3403                         set_initializer_compound_value(tinitializer, entry->index,
3404                                                        initializer);
3405                 }
3406         }
3407         top->initializer = initializer;
3408 }
3409
3410 static void ascend_from_subtype(type_path_t *path)
3411 {
3412         type_path_entry_t *top = get_type_path_top(path);
3413
3414         path->top_type = top->type;
3415
3416         size_t len = ARR_LEN(path->path);
3417         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3418 }
3419
3420 static void walk_designator(type_path_t *path, const designator_t *designator)
3421 {
3422         /* designators start at current object type */
3423         ARR_RESIZE(type_path_entry_t, path->path, 1);
3424
3425         for ( ; designator != NULL; designator = designator->next) {
3426                 type_path_entry_t *top         = get_type_path_top(path);
3427                 type_t            *orig_type   = top->type;
3428                 type_t            *type        = skip_typeref(orig_type);
3429
3430                 if (designator->symbol != NULL) {
3431                         assert(is_type_compound(type));
3432                         size_t    index  = 0;
3433                         symbol_t *symbol = designator->symbol;
3434
3435                         compound_t *compound = type->compound.compound;
3436                         entity_t   *iter     = compound->members.entities;
3437                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3438                                 if (iter->base.symbol == symbol) {
3439                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3440                                         break;
3441                                 }
3442                         }
3443                         assert(iter != NULL);
3444
3445                         top->type           = orig_type;
3446                         top->compound_entry = iter;
3447                         top->index          = index;
3448                         orig_type           = iter->declaration.type;
3449                 } else {
3450                         expression_t *array_index = designator->array_index;
3451                         assert(designator->array_index != NULL);
3452                         assert(is_type_array(type));
3453
3454                         long index = fold_constant(array_index);
3455                         assert(index >= 0);
3456 #ifndef NDEBUG
3457                         if (type->array.size_constant) {
3458                                 long array_size = type->array.size;
3459                                 assert(index < array_size);
3460                         }
3461 #endif
3462
3463                         top->type  = orig_type;
3464                         top->index = (size_t) index;
3465                         orig_type  = type->array.element_type;
3466                 }
3467                 path->top_type = orig_type;
3468
3469                 if (designator->next != NULL) {
3470                         descend_into_subtype(path);
3471                 }
3472         }
3473
3474         path->invalid  = false;
3475 }
3476
3477 static void advance_current_object(type_path_t *path)
3478 {
3479         if (path->invalid) {
3480                 /* TODO: handle this... */
3481                 panic("invalid initializer in ast2firm (excessive elements)");
3482                 return;
3483         }
3484
3485         type_path_entry_t *top = get_type_path_top(path);
3486
3487         type_t *type = skip_typeref(top->type);
3488         if (is_type_union(type)) {
3489                 top->compound_entry = NULL;
3490         } else if (is_type_struct(type)) {
3491                 entity_t *entry = top->compound_entry;
3492
3493                 top->index++;
3494                 entry               = entry->base.next;
3495                 top->compound_entry = entry;
3496                 if (entry != NULL) {
3497                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3498                         path->top_type = entry->declaration.type;
3499                         return;
3500                 }
3501         } else {
3502                 assert(is_type_array(type));
3503
3504                 top->index++;
3505                 if (!type->array.size_constant || top->index < type->array.size) {
3506                         return;
3507                 }
3508         }
3509
3510         /* we're past the last member of the current sub-aggregate, try if we
3511          * can ascend in the type hierarchy and continue with another subobject */
3512         size_t len = ARR_LEN(path->path);
3513
3514         if (len > 1) {
3515                 ascend_from_subtype(path);
3516                 advance_current_object(path);
3517         } else {
3518                 path->invalid = true;
3519         }
3520 }
3521
3522
3523 static ir_initializer_t *create_ir_initializer(
3524                 const initializer_t *initializer, type_t *type);
3525
3526 static ir_initializer_t *create_ir_initializer_value(
3527                 const initializer_value_t *initializer)
3528 {
3529         if (is_type_compound(initializer->value->base.type)) {
3530                 panic("initializer creation for compounds not implemented yet");
3531         }
3532         ir_node *value = expression_to_firm(initializer->value);
3533         return create_initializer_const(value);
3534 }
3535
3536 /** test wether type can be initialized by a string constant */
3537 static bool is_string_type(type_t *type)
3538 {
3539         type_t *inner;
3540         if (is_type_pointer(type)) {
3541                 inner = skip_typeref(type->pointer.points_to);
3542         } else if(is_type_array(type)) {
3543                 inner = skip_typeref(type->array.element_type);
3544         } else {
3545                 return false;
3546         }
3547
3548         return is_type_integer(inner);
3549 }
3550
3551 static ir_initializer_t *create_ir_initializer_list(
3552                 const initializer_list_t *initializer, type_t *type)
3553 {
3554         type_path_t path;
3555         memset(&path, 0, sizeof(path));
3556         path.top_type = type;
3557         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3558
3559         descend_into_subtype(&path);
3560
3561         for (size_t i = 0; i < initializer->len; ++i) {
3562                 const initializer_t *sub_initializer = initializer->initializers[i];
3563
3564                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3565                         walk_designator(&path, sub_initializer->designator.designator);
3566                         continue;
3567                 }
3568
3569                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3570                         /* we might have to descend into types until we're at a scalar
3571                          * type */
3572                         while(true) {
3573                                 type_t *orig_top_type = path.top_type;
3574                                 type_t *top_type      = skip_typeref(orig_top_type);
3575
3576                                 if (is_type_scalar(top_type))
3577                                         break;
3578                                 descend_into_subtype(&path);
3579                         }
3580                 } else if (sub_initializer->kind == INITIALIZER_STRING
3581                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3582                         /* we might have to descend into types until we're at a scalar
3583                          * type */
3584                         while (true) {
3585                                 type_t *orig_top_type = path.top_type;
3586                                 type_t *top_type      = skip_typeref(orig_top_type);
3587
3588                                 if (is_string_type(top_type))
3589                                         break;
3590                                 descend_into_subtype(&path);
3591                         }
3592                 }
3593
3594                 ir_initializer_t *sub_irinitializer
3595                         = create_ir_initializer(sub_initializer, path.top_type);
3596
3597                 size_t path_len = ARR_LEN(path.path);
3598                 assert(path_len >= 1);
3599                 type_path_entry_t *entry        = & path.path[path_len-1];
3600                 ir_initializer_t  *tinitializer = entry->initializer;
3601                 set_initializer_compound_value(tinitializer, entry->index,
3602                                                sub_irinitializer);
3603
3604                 advance_current_object(&path);
3605         }
3606
3607         assert(ARR_LEN(path.path) >= 1);
3608         ir_initializer_t *result = path.path[0].initializer;
3609         DEL_ARR_F(path.path);
3610
3611         return result;
3612 }
3613
3614 static ir_initializer_t *create_ir_initializer_string(
3615                 const initializer_string_t *initializer, type_t *type)
3616 {
3617         type = skip_typeref(type);
3618
3619         size_t            string_len    = initializer->string.size;
3620         assert(type->kind == TYPE_ARRAY);
3621         assert(type->array.size_constant);
3622         size_t            len           = type->array.size;
3623         ir_initializer_t *irinitializer = create_initializer_compound(len);
3624
3625         const char *string = initializer->string.begin;
3626         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3627
3628         for (size_t i = 0; i < len; ++i) {
3629                 char c = 0;
3630                 if (i < string_len)
3631                         c = string[i];
3632
3633                 tarval           *tv = new_tarval_from_long(c, mode);
3634                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3635
3636                 set_initializer_compound_value(irinitializer, i, char_initializer);
3637         }
3638
3639         return irinitializer;
3640 }
3641
3642 static ir_initializer_t *create_ir_initializer_wide_string(
3643                 const initializer_wide_string_t *initializer, type_t *type)
3644 {
3645         size_t            string_len    = initializer->string.size;
3646         assert(type->kind == TYPE_ARRAY);
3647         assert(type->array.size_constant);
3648         size_t            len           = type->array.size;
3649         ir_initializer_t *irinitializer = create_initializer_compound(len);
3650
3651         const wchar_rep_t *string = initializer->string.begin;
3652         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3653
3654         for (size_t i = 0; i < len; ++i) {
3655                 wchar_rep_t c = 0;
3656                 if (i < string_len) {
3657                         c = string[i];
3658                 }
3659                 tarval *tv = new_tarval_from_long(c, mode);
3660                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3661
3662                 set_initializer_compound_value(irinitializer, i, char_initializer);
3663         }
3664
3665         return irinitializer;
3666 }
3667
3668 static ir_initializer_t *create_ir_initializer(
3669                 const initializer_t *initializer, type_t *type)
3670 {
3671         switch(initializer->kind) {
3672                 case INITIALIZER_STRING:
3673                         return create_ir_initializer_string(&initializer->string, type);
3674
3675                 case INITIALIZER_WIDE_STRING:
3676                         return create_ir_initializer_wide_string(&initializer->wide_string,
3677                                                                  type);
3678
3679                 case INITIALIZER_LIST:
3680                         return create_ir_initializer_list(&initializer->list, type);
3681
3682                 case INITIALIZER_VALUE:
3683                         return create_ir_initializer_value(&initializer->value);
3684
3685                 case INITIALIZER_DESIGNATOR:
3686                         panic("unexpected designator initializer found");
3687         }
3688         panic("unknown initializer");
3689 }
3690
3691 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3692                 ir_node *base_addr)
3693 {
3694         if (is_atomic_type(type)) {
3695                 ir_mode *mode = get_type_mode(type);
3696                 tarval  *zero = get_mode_null(mode);
3697                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3698
3699                 /* TODO: bitfields */
3700                 ir_node *mem    = get_store();
3701                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3702                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3703                 set_store(proj_m);
3704         } else {
3705                 assert(is_compound_type(type));
3706
3707                 int n_members;
3708                 if (is_Array_type(type)) {
3709                         assert(has_array_upper_bound(type, 0));
3710                         n_members = get_array_upper_bound_int(type, 0);
3711                 } else {
3712                         n_members = get_compound_n_members(type);
3713                 }
3714
3715                 for (int i = 0; i < n_members; ++i) {
3716                         ir_node *addr;
3717                         ir_type *irtype;
3718                         if (is_Array_type(type)) {
3719                                 ir_entity *entity   = get_array_element_entity(type);
3720                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3721                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3722                                 ir_node   *in[1]    = { cnst };
3723                                 irtype = get_array_element_type(type);
3724                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3725                         } else {
3726                                 ir_entity *member = get_compound_member(type, i);
3727
3728                                 irtype = get_entity_type(member);
3729                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3730                         }
3731
3732                         create_dynamic_null_initializer(irtype, dbgi, addr);
3733                 }
3734         }
3735 }
3736
3737 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3738                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3739 {
3740         switch(get_initializer_kind(initializer)) {
3741         case IR_INITIALIZER_NULL: {
3742                 create_dynamic_null_initializer(type, dbgi, base_addr);
3743                 return;
3744         }
3745         case IR_INITIALIZER_CONST: {
3746                 ir_node *node     = get_initializer_const_value(initializer);
3747                 ir_mode *mode     = get_irn_mode(node);
3748                 ir_type *ent_type = get_entity_type(entity);
3749
3750                 /* is it a bitfield type? */
3751                 if (is_Primitive_type(ent_type) &&
3752                                 get_primitive_base_type(ent_type) != NULL) {
3753                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3754                         return;
3755                 }
3756
3757                 assert(get_type_mode(type) == mode);
3758                 ir_node *mem    = get_store();
3759                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3760                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3761                 set_store(proj_m);
3762                 return;
3763         }
3764         case IR_INITIALIZER_TARVAL: {
3765                 tarval  *tv       = get_initializer_tarval_value(initializer);
3766                 ir_mode *mode     = get_tarval_mode(tv);
3767                 ir_node *cnst     = new_d_Const(dbgi, mode, tv);
3768                 ir_type *ent_type = get_entity_type(entity);
3769
3770                 /* is it a bitfield type? */
3771                 if (is_Primitive_type(ent_type) &&
3772                                 get_primitive_base_type(ent_type) != NULL) {
3773                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3774                         return;
3775                 }
3776
3777                 assert(get_type_mode(type) == mode);
3778                 ir_node *mem    = get_store();
3779                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3780                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3781                 set_store(proj_m);
3782                 return;
3783         }
3784         case IR_INITIALIZER_COMPOUND: {
3785                 assert(is_compound_type(type));
3786                 int n_members;
3787                 if (is_Array_type(type)) {
3788                         assert(has_array_upper_bound(type, 0));
3789                         n_members = get_array_upper_bound_int(type, 0);
3790                 } else {
3791                         n_members = get_compound_n_members(type);
3792                 }
3793
3794                 if (get_initializer_compound_n_entries(initializer)
3795                                 != (unsigned) n_members)
3796                         panic("initializer doesn't match compound type");
3797
3798                 for (int i = 0; i < n_members; ++i) {
3799                         ir_node   *addr;
3800                         ir_type   *irtype;
3801                         ir_entity *sub_entity;
3802                         if (is_Array_type(type)) {
3803                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3804                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3805                                 ir_node   *in[1]    = { cnst };
3806                                 irtype     = get_array_element_type(type);
3807                                 sub_entity = get_array_element_entity(type);
3808                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3809                                                        sub_entity);
3810                         } else {
3811                                 sub_entity = get_compound_member(type, i);
3812                                 irtype     = get_entity_type(sub_entity);
3813                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3814                                                              sub_entity);
3815                         }
3816
3817                         ir_initializer_t *sub_init
3818                                 = get_initializer_compound_value(initializer, i);
3819
3820                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3821                                                        addr);
3822                 }
3823                 return;
3824         }
3825         }
3826
3827         panic("invalid IR_INITIALIZER found");
3828 }
3829
3830 static void create_dynamic_initializer(ir_initializer_t *initializer,
3831                 dbg_info *dbgi, ir_entity *entity)
3832 {
3833         ir_node *frame     = get_local_frame(entity);
3834         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3835         ir_type *type      = get_entity_type(entity);
3836
3837         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3838 }
3839
3840 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3841                                      ir_entity *entity, type_t *type)
3842 {
3843         ir_node *memory = get_store();
3844         ir_node *nomem  = new_NoMem();
3845         ir_node *frame  = get_irg_frame(current_ir_graph);
3846         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3847
3848         if (initializer->kind == INITIALIZER_VALUE) {
3849                 initializer_value_t *initializer_value = &initializer->value;
3850
3851                 ir_node *value = expression_to_firm(initializer_value->value);
3852                 type = skip_typeref(type);
3853                 assign_value(dbgi, addr, type, value);
3854                 return;
3855         }
3856
3857         if (!is_constant_initializer(initializer)) {
3858                 ir_initializer_t *irinitializer
3859                         = create_ir_initializer(initializer, type);
3860
3861                 create_dynamic_initializer(irinitializer, dbgi, entity);
3862                 return;
3863         }
3864
3865         /* create the ir_initializer */
3866         ir_graph *const old_current_ir_graph = current_ir_graph;
3867         current_ir_graph = get_const_code_irg();
3868
3869         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3870
3871         assert(current_ir_graph == get_const_code_irg());
3872         current_ir_graph = old_current_ir_graph;
3873
3874         /* create a "template" entity which is copied to the entity on the stack */
3875         ident     *const id          = id_unique("initializer.%u");
3876         ir_type   *const irtype      = get_ir_type(type);
3877         ir_type   *const global_type = get_glob_type();
3878         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3879         set_entity_ld_ident(init_entity, id);
3880
3881         set_entity_variability(init_entity, variability_initialized);
3882         set_entity_visibility(init_entity, visibility_local);
3883         set_entity_allocation(init_entity, allocation_static);
3884
3885         set_entity_initializer(init_entity, irinitializer);
3886
3887         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3888         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3889
3890         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3891         set_store(copyb_mem);
3892 }
3893
3894 static void create_initializer_local_variable_entity(entity_t *entity)
3895 {
3896         assert(entity->kind == ENTITY_VARIABLE);
3897         initializer_t *initializer = entity->variable.initializer;
3898         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
3899         ir_entity     *irentity    = entity->variable.v.entity;
3900         type_t        *type        = entity->declaration.type;
3901         create_local_initializer(initializer, dbgi, irentity, type);
3902 }
3903
3904 static void create_variable_initializer(entity_t *entity)
3905 {
3906         assert(entity->kind == ENTITY_VARIABLE);
3907         initializer_t *initializer = entity->variable.initializer;
3908         if (initializer == NULL)
3909                 return;
3910
3911         declaration_kind_t declaration_kind
3912                 = (declaration_kind_t) entity->declaration.kind;
3913         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3914                 create_initializer_local_variable_entity(entity);
3915                 return;
3916         }
3917
3918         type_t            *type = entity->declaration.type;
3919         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3920
3921         if (initializer->kind == INITIALIZER_VALUE) {
3922                 initializer_value_t *initializer_value = &initializer->value;
3923                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
3924
3925                 ir_node *value = expression_to_firm(initializer_value->value);
3926                 value = do_strict_conv(dbgi, value);
3927
3928                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3929                         set_value(entity->variable.v.value_number, value);
3930                 } else {
3931                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3932
3933                         ir_entity *irentity = entity->variable.v.entity;
3934
3935                         if (tq & TYPE_QUALIFIER_CONST) {
3936                                 set_entity_variability(irentity, variability_constant);
3937                         } else {
3938                                 set_entity_variability(irentity, variability_initialized);
3939                         }
3940                         set_atomic_ent_value(irentity, value);
3941                 }
3942         } else {
3943                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3944                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3945
3946                 ir_entity        *irentity        = entity->variable.v.entity;
3947                 ir_initializer_t *irinitializer
3948                         = create_ir_initializer(initializer, type);
3949
3950                 if (tq & TYPE_QUALIFIER_CONST) {
3951                         set_entity_variability(irentity, variability_constant);
3952                 } else {
3953                         set_entity_variability(irentity, variability_initialized);
3954                 }
3955                 set_entity_initializer(irentity, irinitializer);
3956         }
3957 }
3958
3959 static void create_variable_length_array(entity_t *entity)
3960 {
3961         assert(entity->kind == ENTITY_VARIABLE);
3962         assert(entity->variable.initializer == NULL);
3963
3964         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3965         entity->variable.v.vla_base = NULL;
3966
3967         /* TODO: record VLA somewhere so we create the free node when we leave
3968          * it's scope */
3969 }
3970
3971 static void allocate_variable_length_array(entity_t *entity)
3972 {
3973         assert(entity->kind == ENTITY_VARIABLE);
3974         assert(entity->variable.initializer == NULL);
3975         assert(get_cur_block() != NULL);
3976
3977         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
3978         type_t   *type      = entity->declaration.type;
3979         ir_type  *el_type   = get_ir_type(type->array.element_type);
3980
3981         /* make sure size_node is calculated */
3982         get_type_size(type);
3983         ir_node  *elems = type->array.size_node;
3984         ir_node  *mem   = get_store();
3985         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3986
3987         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3988         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3989         set_store(proj_m);
3990
3991         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3992         entity->variable.v.vla_base = addr;
3993 }
3994
3995 /**
3996  * Creates a Firm local variable from a declaration.
3997  */
3998 static void create_local_variable(entity_t *entity)
3999 {
4000         assert(entity->kind == ENTITY_VARIABLE);
4001         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4002
4003         bool needs_entity = entity->variable.address_taken;
4004         type_t *type = skip_typeref(entity->declaration.type);
4005
4006         /* is it a variable length array? */
4007         if (is_type_array(type) && !type->array.size_constant) {
4008                 create_variable_length_array(entity);
4009                 return;
4010         } else if (is_type_array(type) || is_type_compound(type)) {
4011                 needs_entity = true;
4012         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4013                 needs_entity = true;
4014         }
4015
4016         if (needs_entity) {
4017                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4018                 create_variable_entity(entity,
4019                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4020                                        frame_type);
4021         } else {
4022                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4023                 entity->variable.v.value_number = next_value_number_function;
4024                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4025                                         (variable_t*) &entity->variable);
4026                 ++next_value_number_function;
4027         }
4028 }
4029
4030 static void create_local_static_variable(entity_t *entity)
4031 {
4032         assert(entity->kind == ENTITY_VARIABLE);
4033         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4034
4035         type_t    *const type     = skip_typeref(entity->declaration.type);
4036         ir_type   *const var_type = entity->variable.thread_local ?
4037                 get_tls_type() : get_glob_type();
4038         ir_type   *const irtype   = get_ir_type(type);
4039         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4040
4041         size_t l = strlen(entity->base.symbol->string);
4042         char   buf[l + sizeof(".%u")];
4043         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4044         ident     *const id = id_unique(buf);
4045
4046         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4047
4048         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4049                 set_entity_volatility(irentity, volatility_is_volatile);
4050         }
4051
4052         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4053         entity->variable.v.entity = irentity;
4054         set_entity_ld_ident(irentity, id);
4055         set_entity_variability(irentity, variability_uninitialized);
4056         set_entity_visibility(irentity, visibility_local);
4057         set_entity_allocation(irentity, entity->variable.thread_local ?
4058                 allocation_automatic : allocation_static);
4059
4060         ir_graph *const old_current_ir_graph = current_ir_graph;
4061         current_ir_graph = get_const_code_irg();
4062
4063         create_variable_initializer(entity);
4064
4065         assert(current_ir_graph == get_const_code_irg());
4066         current_ir_graph = old_current_ir_graph;
4067 }
4068
4069
4070
4071 static void return_statement_to_firm(return_statement_t *statement)
4072 {
4073         if (get_cur_block() == NULL)
4074                 return;
4075
4076         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4077         type_t   *type        = current_function_entity->declaration.type;
4078         ir_type  *func_irtype = get_ir_type(type);
4079
4080
4081         ir_node *in[1];
4082         int      in_len;
4083         if (get_method_n_ress(func_irtype) > 0) {
4084                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4085
4086                 if (statement->value != NULL) {
4087                         ir_node *node = expression_to_firm(statement->value);
4088                         node  = do_strict_conv(dbgi, node);
4089                         in[0] = node;
4090                 } else {
4091                         ir_mode *mode;
4092                         if (is_compound_type(res_type)) {
4093                                 mode = mode_P_data;
4094                         } else {
4095                                 mode = get_type_mode(res_type);
4096                         }
4097                         in[0] = new_Unknown(mode);
4098                 }
4099                 in_len = 1;
4100         } else {
4101                 /* build return_value for its side effects */
4102                 if (statement->value != NULL) {
4103                         expression_to_firm(statement->value);
4104                 }
4105                 in_len = 0;
4106         }
4107
4108         ir_node  *store = get_store();
4109         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4110
4111         ir_node *end_block = get_irg_end_block(current_ir_graph);
4112         add_immBlock_pred(end_block, ret);
4113
4114         set_cur_block(NULL);
4115 }
4116
4117 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4118 {
4119         if (get_cur_block() == NULL)
4120                 return NULL;
4121
4122         return expression_to_firm(statement->expression);
4123 }
4124
4125 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4126 {
4127         entity_t *entity = compound->scope.entities;
4128         for ( ; entity != NULL; entity = entity->base.next) {
4129                 if (!is_declaration(entity))
4130                         continue;
4131
4132                 create_local_declaration(entity);
4133         }
4134
4135         ir_node     *result    = NULL;
4136         statement_t *statement = compound->statements;
4137         for ( ; statement != NULL; statement = statement->base.next) {
4138                 if (statement->base.next == NULL
4139                                 && statement->kind == STATEMENT_EXPRESSION) {
4140                         result = expression_statement_to_firm(
4141                                         &statement->expression);
4142                         break;
4143                 }
4144                 statement_to_firm(statement);
4145         }
4146
4147         return result;
4148 }
4149
4150 static void create_global_variable(entity_t *entity)
4151 {
4152         assert(entity->kind == ENTITY_VARIABLE);
4153
4154         ir_visibility vis;
4155         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4156                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4157                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4158                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4159
4160                 default: panic("Invalid storage class for global variable");
4161         }
4162
4163         ir_type *var_type = entity->variable.thread_local ?
4164                 get_tls_type() : get_glob_type();
4165         create_variable_entity(entity,
4166                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4167         set_entity_visibility(entity->variable.v.entity, vis);
4168 }
4169
4170 static void create_local_declaration(entity_t *entity)
4171 {
4172         assert(is_declaration(entity));
4173
4174         /* construct type */
4175         (void) get_ir_type(entity->declaration.type);
4176         if (entity->base.symbol == NULL) {
4177                 return;
4178         }
4179
4180         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4181         case STORAGE_CLASS_STATIC:
4182                 create_local_static_variable(entity);
4183                 return;
4184         case STORAGE_CLASS_EXTERN:
4185                 if (entity->kind == ENTITY_FUNCTION) {
4186                         assert(entity->function.statement == NULL);
4187                         get_function_entity(entity);
4188                 } else {
4189                         create_global_variable(entity);
4190                         create_variable_initializer(entity);
4191                 }
4192                 return;
4193         case STORAGE_CLASS_NONE:
4194         case STORAGE_CLASS_AUTO:
4195         case STORAGE_CLASS_REGISTER:
4196                 if (entity->kind == ENTITY_FUNCTION) {
4197                         if (entity->function.statement != NULL) {
4198                                 get_function_entity(entity);
4199                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4200                                 enqueue_inner_function(entity);
4201                         } else {
4202                                 get_function_entity(entity);
4203                         }
4204                 } else {
4205                         create_local_variable(entity);
4206                 }
4207                 return;
4208         case STORAGE_CLASS_TYPEDEF:
4209                 break;
4210         }
4211         panic("invalid storage class found");
4212 }
4213
4214 static void initialize_local_declaration(entity_t *entity)
4215 {
4216         if (entity->base.symbol == NULL)
4217                 return;
4218
4219         switch ((declaration_kind_t) entity->declaration.kind) {
4220         case DECLARATION_KIND_LOCAL_VARIABLE:
4221         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4222                 create_variable_initializer(entity);
4223                 return;
4224
4225         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4226                 allocate_variable_length_array(entity);
4227                 return;
4228
4229         case DECLARATION_KIND_COMPOUND_MEMBER:
4230         case DECLARATION_KIND_GLOBAL_VARIABLE:
4231         case DECLARATION_KIND_FUNCTION:
4232         case DECLARATION_KIND_INNER_FUNCTION:
4233                 return;
4234
4235         case DECLARATION_KIND_UNKNOWN:
4236                 panic("can't initialize unknown declaration");
4237         }
4238         panic("invalid declaration kind");
4239 }
4240
4241 static void declaration_statement_to_firm(declaration_statement_t *statement)
4242 {
4243         entity_t *entity = statement->declarations_begin;
4244         entity_t *end    = statement->declarations_end->base.next;
4245         for ( ; entity != end; entity = entity->base.next) {
4246                 if (!is_declaration(entity))
4247                         continue;
4248                 initialize_local_declaration(entity);
4249         }
4250 }
4251
4252 static void if_statement_to_firm(if_statement_t *statement)
4253 {
4254         ir_node *cur_block = get_cur_block();
4255
4256         ir_node *fallthrough_block = NULL;
4257
4258         /* the true (blocks) */
4259         ir_node *true_block = NULL;
4260         if (statement->true_statement != NULL) {
4261                 true_block = new_immBlock();
4262                 statement_to_firm(statement->true_statement);
4263                 if (get_cur_block() != NULL) {
4264                         ir_node *jmp = new_Jmp();
4265                         if (fallthrough_block == NULL)
4266                                 fallthrough_block = new_immBlock();
4267                         add_immBlock_pred(fallthrough_block, jmp);
4268                 }
4269         }
4270
4271         /* the false (blocks) */
4272         ir_node *false_block = NULL;
4273         if (statement->false_statement != NULL) {
4274                 false_block = new_immBlock();
4275
4276                 statement_to_firm(statement->false_statement);
4277                 if (get_cur_block() != NULL) {
4278                         ir_node *jmp = new_Jmp();
4279                         if (fallthrough_block == NULL)
4280                                 fallthrough_block = new_immBlock();
4281                         add_immBlock_pred(fallthrough_block, jmp);
4282                 }
4283         }
4284
4285         /* create the condition */
4286         if (cur_block != NULL) {
4287                 if (true_block == NULL || false_block == NULL) {
4288                         if (fallthrough_block == NULL)
4289                                 fallthrough_block = new_immBlock();
4290                         if (true_block == NULL)
4291                                 true_block = fallthrough_block;
4292                         if (false_block == NULL)
4293                                 false_block = fallthrough_block;
4294                 }
4295
4296                 set_cur_block(cur_block);
4297                 create_condition_evaluation(statement->condition, true_block,
4298                                             false_block);
4299         }
4300
4301         mature_immBlock(true_block);
4302         if (false_block != fallthrough_block && false_block != NULL) {
4303                 mature_immBlock(false_block);
4304         }
4305         if (fallthrough_block != NULL) {
4306                 mature_immBlock(fallthrough_block);
4307         }
4308
4309         set_cur_block(fallthrough_block);
4310 }
4311
4312 static void while_statement_to_firm(while_statement_t *statement)
4313 {
4314         ir_node *jmp = NULL;
4315         if (get_cur_block() != NULL) {
4316                 jmp = new_Jmp();
4317         }
4318
4319         /* create the header block */
4320         ir_node *header_block = new_immBlock();
4321         if (jmp != NULL) {
4322                 add_immBlock_pred(header_block, jmp);
4323         }
4324
4325         /* the loop body */
4326         ir_node *old_continue_label = continue_label;
4327         ir_node *old_break_label    = break_label;
4328         continue_label              = header_block;
4329         break_label                 = NULL;
4330
4331         ir_node *body_block = new_immBlock();
4332         statement_to_firm(statement->body);
4333         ir_node *false_block = break_label;
4334
4335         assert(continue_label == header_block);
4336         continue_label = old_continue_label;
4337         break_label    = old_break_label;
4338
4339         if (get_cur_block() != NULL) {
4340                 jmp = new_Jmp();
4341                 add_immBlock_pred(header_block, jmp);
4342         }
4343
4344         /* shortcut for while(true) */
4345         if (is_constant_expression(statement->condition)
4346                         && fold_constant(statement->condition) != 0) {
4347                 set_cur_block(header_block);
4348                 ir_node *header_jmp = new_Jmp();
4349                 add_immBlock_pred(body_block, header_jmp);
4350
4351                 keep_alive(body_block);
4352                 keep_all_memory(body_block);
4353                 set_cur_block(body_block);
4354         } else {
4355                 if (false_block == NULL) {
4356                         false_block = new_immBlock();
4357                 }
4358
4359                 /* create the condition */
4360                 set_cur_block(header_block);
4361
4362                 create_condition_evaluation(statement->condition, body_block,
4363                                             false_block);
4364         }
4365
4366         mature_immBlock(body_block);
4367         mature_immBlock(header_block);
4368         if (false_block != NULL) {
4369                 mature_immBlock(false_block);
4370         }
4371
4372         set_cur_block(false_block);
4373 }
4374
4375 static void do_while_statement_to_firm(do_while_statement_t *statement)
4376 {
4377         ir_node *jmp = NULL;
4378         if (get_cur_block() != NULL) {
4379                 jmp = new_Jmp();
4380         }
4381
4382         /* create the header block */
4383         ir_node *header_block = new_immBlock();
4384
4385         /* the loop body */
4386         ir_node *body_block = new_immBlock();
4387         if (jmp != NULL) {
4388                 add_immBlock_pred(body_block, jmp);
4389         }
4390
4391         ir_node *old_continue_label = continue_label;
4392         ir_node *old_break_label    = break_label;
4393         continue_label              = header_block;
4394         break_label                 = NULL;
4395
4396         statement_to_firm(statement->body);
4397         ir_node *false_block = break_label;
4398
4399         assert(continue_label == header_block);
4400         continue_label = old_continue_label;
4401         break_label    = old_break_label;
4402
4403         if (get_cur_block() != NULL) {
4404                 ir_node *body_jmp = new_Jmp();
4405                 add_immBlock_pred(header_block, body_jmp);
4406                 mature_immBlock(header_block);
4407         }
4408
4409         if (false_block == NULL) {
4410                 false_block = new_immBlock();
4411         }
4412
4413         /* create the condition */
4414         set_cur_block(header_block);
4415
4416         create_condition_evaluation(statement->condition, body_block, false_block);
4417         mature_immBlock(body_block);
4418         mature_immBlock(header_block);
4419         if (false_block != NULL) {
4420                 mature_immBlock(false_block);
4421         }
4422
4423         set_cur_block(false_block);
4424 }
4425
4426 static void for_statement_to_firm(for_statement_t *statement)
4427 {
4428         ir_node *jmp = NULL;
4429
4430         /* create declarations */
4431         entity_t *entity = statement->scope.entities;
4432         for ( ; entity != NULL; entity = entity->base.next) {
4433                 if (!is_declaration(entity))
4434                         continue;
4435
4436                 create_local_declaration(entity);
4437         }
4438
4439         if (get_cur_block() != NULL) {
4440                 entity = statement->scope.entities;
4441                 for ( ; entity != NULL; entity = entity->base.next) {
4442                         if (!is_declaration(entity))
4443                                 continue;
4444
4445                         initialize_local_declaration(entity);
4446                 }
4447
4448                 if (statement->initialisation != NULL) {
4449                         expression_to_firm(statement->initialisation);
4450                 }
4451
4452                 jmp = new_Jmp();
4453         }
4454
4455
4456         /* create the step block */
4457         ir_node *const step_block = new_immBlock();
4458         if (statement->step != NULL) {
4459                 expression_to_firm(statement->step);
4460         }
4461         ir_node *const step_jmp = new_Jmp();
4462
4463         /* create the header block */
4464         ir_node *const header_block = new_immBlock();
4465         if (jmp != NULL) {
4466                 add_immBlock_pred(header_block, jmp);
4467         }
4468         add_immBlock_pred(header_block, step_jmp);
4469
4470         /* the false block */
4471         ir_node *const false_block = new_immBlock();
4472
4473         /* the loop body */
4474         ir_node * body_block;
4475         if (statement->body != NULL) {
4476                 ir_node *const old_continue_label = continue_label;
4477                 ir_node *const old_break_label    = break_label;
4478                 continue_label = step_block;
4479                 break_label    = false_block;
4480
4481                 body_block = new_immBlock();
4482                 statement_to_firm(statement->body);
4483
4484                 assert(continue_label == step_block);
4485                 assert(break_label    == false_block);
4486                 continue_label = old_continue_label;
4487                 break_label    = old_break_label;
4488
4489                 if (get_cur_block() != NULL) {
4490                         jmp = new_Jmp();
4491                         add_immBlock_pred(step_block, jmp);
4492                 }
4493         } else {
4494                 body_block = step_block;
4495         }
4496
4497         /* create the condition */
4498         set_cur_block(header_block);
4499         if (statement->condition != NULL) {
4500                 create_condition_evaluation(statement->condition, body_block,
4501                                             false_block);
4502         } else {
4503                 keep_alive(header_block);
4504                 keep_all_memory(header_block);
4505                 jmp = new_Jmp();
4506                 add_immBlock_pred(body_block, jmp);
4507         }
4508
4509         mature_immBlock(body_block);
4510         mature_immBlock(false_block);
4511         mature_immBlock(step_block);
4512         mature_immBlock(header_block);
4513         mature_immBlock(false_block);
4514
4515         set_cur_block(false_block);
4516 }
4517
4518 static void create_jump_statement(const statement_t *statement,
4519                                   ir_node *target_block)
4520 {
4521         if (get_cur_block() == NULL)
4522                 return;
4523
4524         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4525         ir_node  *jump = new_d_Jmp(dbgi);
4526         add_immBlock_pred(target_block, jump);
4527
4528         set_cur_block(NULL);
4529 }
4530
4531 static ir_node *get_break_label(void)
4532 {
4533         if (break_label == NULL) {
4534                 ir_node *cur_block = get_cur_block();
4535                 break_label = new_immBlock();
4536                 set_cur_block(cur_block);
4537         }
4538         return break_label;
4539 }
4540
4541 static void switch_statement_to_firm(switch_statement_t *statement)
4542 {
4543         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4544
4545         ir_node *expression  = expression_to_firm(statement->expression);
4546         ir_node *cond        = new_d_Cond(dbgi, expression);
4547
4548         set_cur_block(NULL);
4549
4550         ir_node *const old_switch_cond       = current_switch_cond;
4551         ir_node *const old_break_label       = break_label;
4552         const bool     old_saw_default_label = saw_default_label;
4553         saw_default_label                    = false;
4554         current_switch_cond                  = cond;
4555         break_label                          = NULL;
4556         switch_statement_t *const old_switch = current_switch;
4557         current_switch                       = statement;
4558
4559         /* determine a free number for the default label */
4560         unsigned long num_cases = 0;
4561         long def_nr = 0;
4562         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4563                 if (l->expression == NULL) {
4564                         /* default case */
4565                         continue;
4566                 }
4567                 if (l->last_case >= l->first_case)
4568                         num_cases += l->last_case - l->first_case + 1;
4569                 if (l->last_case > def_nr)
4570                         def_nr = l->last_case;
4571         }
4572
4573         if (def_nr == INT_MAX) {
4574                 /* Bad: an overflow will occurr, we cannot be sure that the
4575                  * maximum + 1 is a free number. Scan the values a second
4576                  * time to find a free number.
4577                  */
4578                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4579
4580                 memset(bits, 0, (num_cases + 7) >> 3);
4581                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4582                         if (l->expression == NULL) {
4583                                 /* default case */
4584                                 continue;
4585                         }
4586                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4587                         if (start < num_cases && l->last_case >= 0) {
4588                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4589                                         (unsigned long)l->last_case : num_cases - 1;
4590                                 for (unsigned long cns = start; cns <= end; ++cns) {
4591                                         bits[cns >> 3] |= (1 << (cns & 7));
4592                                 }
4593                         }
4594                 }
4595                 /* We look at the first num_cases constants:
4596                  * Either they are densed, so we took the last (num_cases)
4597                  * one, or they are non densed, so we will find one free
4598                  * there...
4599                  */
4600                 unsigned long i;
4601                 for (i = 0; i < num_cases; ++i)
4602                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4603                                 break;
4604
4605                 free(bits);
4606                 def_nr = i;
4607         } else {
4608                 ++def_nr;
4609         }
4610         statement->default_proj_nr = def_nr;
4611
4612         if (statement->body != NULL) {
4613                 statement_to_firm(statement->body);
4614         }
4615
4616         if (get_cur_block() != NULL) {
4617                 ir_node *jmp = new_Jmp();
4618                 add_immBlock_pred(get_break_label(), jmp);
4619         }
4620
4621         if (!saw_default_label) {
4622                 set_cur_block(get_nodes_block(cond));
4623                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4624                                                         statement->default_proj_nr);
4625                 add_immBlock_pred(get_break_label(), proj);
4626         }
4627
4628         if (break_label != NULL) {
4629                 mature_immBlock(break_label);
4630         }
4631         set_cur_block(break_label);
4632
4633         assert(current_switch_cond == cond);
4634         current_switch      = old_switch;
4635         current_switch_cond = old_switch_cond;
4636         break_label         = old_break_label;
4637         saw_default_label   = old_saw_default_label;
4638 }
4639
4640 static void case_label_to_firm(const case_label_statement_t *statement)
4641 {
4642         if (statement->is_empty_range)
4643                 return;
4644
4645         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4646
4647         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4648
4649         ir_node *proj;
4650         ir_node *old_block = get_nodes_block(current_switch_cond);
4651         ir_node *block     = new_immBlock();
4652
4653         set_cur_block(old_block);
4654         if (statement->expression != NULL) {
4655                 long pn     = statement->first_case;
4656                 long end_pn = statement->last_case;
4657                 assert(pn <= end_pn);
4658                 /* create jumps for all cases in the given range */
4659                 do {
4660                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4661                         add_immBlock_pred(block, proj);
4662                 } while(pn++ < end_pn);
4663         } else {
4664                 saw_default_label = true;
4665                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4666                                          current_switch->default_proj_nr);
4667
4668                 add_immBlock_pred(block, proj);
4669         }
4670
4671         if (fallthrough != NULL) {
4672                 add_immBlock_pred(block, fallthrough);
4673         }
4674         mature_immBlock(block);
4675         set_cur_block(block);
4676
4677         if (statement->statement != NULL) {
4678                 statement_to_firm(statement->statement);
4679         }
4680 }
4681
4682 static void label_to_firm(const label_statement_t *statement)
4683 {
4684         ir_node *block = get_label_block(statement->label);
4685
4686         if (get_cur_block() != NULL) {
4687                 ir_node *jmp = new_Jmp();
4688                 add_immBlock_pred(block, jmp);
4689         }
4690
4691         set_cur_block(block);
4692         keep_alive(block);
4693         keep_all_memory(block);
4694
4695         if (statement->statement != NULL) {
4696                 statement_to_firm(statement->statement);
4697         }
4698 }
4699
4700 static void goto_to_firm(const goto_statement_t *statement)
4701 {
4702         if (get_cur_block() == NULL)
4703                 return;
4704
4705         if (statement->expression) {
4706                 ir_node  *irn  = expression_to_firm(statement->expression);
4707                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4708                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4709
4710                 set_irn_link(ijmp, ijmp_list);
4711                 ijmp_list = ijmp;
4712         } else {
4713                 ir_node *block = get_label_block(statement->label);
4714                 ir_node *jmp   = new_Jmp();
4715                 add_immBlock_pred(block, jmp);
4716         }
4717         set_cur_block(NULL);
4718 }
4719
4720 static void asm_statement_to_firm(const asm_statement_t *statement)
4721 {
4722         bool needs_memory = false;
4723
4724         if (statement->is_volatile) {
4725                 needs_memory = true;
4726         }
4727
4728         size_t         n_clobbers = 0;
4729         asm_clobber_t *clobber    = statement->clobbers;
4730         for ( ; clobber != NULL; clobber = clobber->next) {
4731                 const char *clobber_str = clobber->clobber.begin;
4732
4733                 if (!be_is_valid_clobber(clobber_str)) {
4734                         errorf(&statement->base.source_position,
4735                                    "invalid clobber '%s' specified", clobber->clobber);
4736                         continue;
4737                 }
4738
4739                 if (strcmp(clobber_str, "memory") == 0) {
4740                         needs_memory = true;
4741                         continue;
4742                 }
4743
4744                 ident *id = new_id_from_str(clobber_str);
4745                 obstack_ptr_grow(&asm_obst, id);
4746                 ++n_clobbers;
4747         }
4748         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4749         ident **clobbers = NULL;
4750         if (n_clobbers > 0) {
4751                 clobbers = obstack_finish(&asm_obst);
4752         }
4753
4754         size_t n_inputs  = 0;
4755         asm_argument_t *argument = statement->inputs;
4756         for ( ; argument != NULL; argument = argument->next)
4757                 n_inputs++;
4758         size_t n_outputs = 0;
4759         argument = statement->outputs;
4760         for ( ; argument != NULL; argument = argument->next)
4761                 n_outputs++;
4762
4763         unsigned next_pos = 0;
4764
4765         ir_node *ins[n_inputs + n_outputs + 1];
4766         size_t   in_size = 0;
4767
4768         ir_asm_constraint tmp_in_constraints[n_outputs];
4769
4770         const expression_t *out_exprs[n_outputs];
4771         ir_node            *out_addrs[n_outputs];
4772         size_t              out_size = 0;
4773
4774         argument = statement->outputs;
4775         for ( ; argument != NULL; argument = argument->next) {
4776                 const char *constraints = argument->constraints.begin;
4777                 asm_constraint_flags_t asm_flags
4778                         = be_parse_asm_constraints(constraints);
4779
4780                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4781                         errorf(&statement->base.source_position,
4782                                "some constraints in '%s' are not supported", constraints);
4783                         continue;
4784                 }
4785                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4786                         errorf(&statement->base.source_position,
4787                                "some constraints in '%s' are invalid", constraints);
4788                         continue;
4789                 }
4790                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4791                         errorf(&statement->base.source_position,
4792                                "no write flag specified for output constraints '%s'",
4793                                constraints);
4794                         continue;
4795                 }
4796
4797                 unsigned pos = next_pos++;
4798                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4799                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4800                         expression_t *expr = argument->expression;
4801                         ir_node      *addr = expression_to_addr(expr);
4802                         /* in+output, construct an artifical same_as constraint on the
4803                          * input */
4804                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4805                                 char     buf[64];
4806                                 ir_node *value = get_value_from_lvalue(expr, addr);
4807
4808                                 snprintf(buf, sizeof(buf), "%u", pos);
4809
4810                                 ir_asm_constraint constraint;
4811                                 constraint.pos              = pos;
4812                                 constraint.constraint       = new_id_from_str(buf);
4813                                 constraint.mode             = get_ir_mode(expr->base.type);
4814                                 tmp_in_constraints[in_size] = constraint;
4815                                 ins[in_size] = value;
4816
4817                                 ++in_size;
4818                         }
4819
4820                         out_exprs[out_size] = expr;
4821                         out_addrs[out_size] = addr;
4822                         ++out_size;
4823                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4824                         /* pure memory ops need no input (but we have to make sure we
4825                          * attach to the memory) */
4826                         assert(! (asm_flags &
4827                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4828                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4829                         needs_memory = true;
4830
4831                         /* we need to attach the address to the inputs */
4832                         expression_t *expr = argument->expression;
4833
4834                         ir_asm_constraint constraint;
4835                         constraint.pos              = pos;
4836                         constraint.constraint       = new_id_from_str(constraints);
4837                         constraint.mode             = NULL;
4838                         tmp_in_constraints[in_size] = constraint;
4839
4840                         ins[in_size]          = expression_to_addr(expr);
4841                         ++in_size;
4842                         continue;
4843                 } else {
4844                         errorf(&statement->base.source_position,
4845                                "only modifiers but no place set in constraints '%s'",
4846                                constraints);
4847                         continue;
4848                 }
4849
4850                 ir_asm_constraint constraint;
4851                 constraint.pos        = pos;
4852                 constraint.constraint = new_id_from_str(constraints);
4853                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4854
4855                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4856         }
4857         assert(obstack_object_size(&asm_obst)
4858                         == out_size * sizeof(ir_asm_constraint));
4859         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4860
4861
4862         obstack_grow(&asm_obst, tmp_in_constraints,
4863                      in_size * sizeof(tmp_in_constraints[0]));
4864         /* find and count input and output arguments */
4865         argument = statement->inputs;
4866         for ( ; argument != NULL; argument = argument->next) {
4867                 const char *constraints = argument->constraints.begin;
4868                 asm_constraint_flags_t asm_flags
4869                         = be_parse_asm_constraints(constraints);
4870
4871                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4872                         errorf(&statement->base.source_position,
4873                                "some constraints in '%s' are not supported", constraints);
4874                         continue;
4875                 }
4876                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4877                         errorf(&statement->base.source_position,
4878                                "some constraints in '%s' are invalid", constraints);
4879                         continue;
4880                 }
4881                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4882                         errorf(&statement->base.source_position,
4883                                "write flag specified for input constraints '%s'",
4884                                constraints);
4885                         continue;
4886                 }
4887
4888                 ir_node *input;
4889                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4890                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4891                         /* we can treat this as "normal" input */
4892                         input = expression_to_firm(argument->expression);
4893                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4894                         /* pure memory ops need no input (but we have to make sure we
4895                          * attach to the memory) */
4896                         assert(! (asm_flags &
4897                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4898                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4899                         needs_memory = true;
4900                         input = expression_to_addr(argument->expression);
4901                 } else {
4902                         errorf(&statement->base.source_position,
4903                                "only modifiers but no place set in constraints '%s'",
4904                                constraints);
4905                         continue;
4906                 }
4907
4908                 ir_asm_constraint constraint;
4909                 constraint.pos        = next_pos++;
4910                 constraint.constraint = new_id_from_str(constraints);
4911                 constraint.mode       = get_irn_mode(input);
4912
4913                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4914                 ins[in_size++] = input;
4915         }
4916
4917         if (needs_memory) {
4918                 ir_asm_constraint constraint;
4919                 constraint.pos        = next_pos++;
4920                 constraint.constraint = new_id_from_str("");
4921                 constraint.mode       = mode_M;
4922
4923                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4924                 ins[in_size++] = get_store();
4925         }
4926
4927         assert(obstack_object_size(&asm_obst)
4928                         == in_size * sizeof(ir_asm_constraint));
4929         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4930
4931         /* create asm node */
4932         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4933
4934         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4935
4936         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4937                                   out_size, output_constraints,
4938                                   n_clobbers, clobbers, asm_text);
4939
4940         if (statement->is_volatile) {
4941                 set_irn_pinned(node, op_pin_state_pinned);
4942         } else {
4943                 set_irn_pinned(node, op_pin_state_floats);
4944         }
4945
4946         /* create output projs & connect them */
4947         if (needs_memory) {
4948                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4949                 set_store(projm);
4950         }
4951
4952         size_t i;
4953         for (i = 0; i < out_size; ++i) {
4954                 const expression_t *out_expr = out_exprs[i];
4955                 long                pn       = i;
4956                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4957                 ir_node            *proj     = new_Proj(node, mode, pn);
4958                 ir_node            *addr     = out_addrs[i];
4959
4960                 set_value_for_expression_addr(out_expr, proj, addr);
4961         }
4962 }
4963
4964 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4965         statement_to_firm(statement->try_statement);
4966         warningf(&statement->base.source_position, "structured exception handling ignored");
4967 }
4968
4969 static void     leave_statement_to_firm(leave_statement_t *statement) {
4970         errorf(&statement->base.source_position, "__leave not supported yet");
4971 }
4972
4973 /**
4974  * Transform a statement.
4975  */
4976 static void statement_to_firm(statement_t *statement)
4977 {
4978 #ifndef NDEBUG
4979         assert(!statement->base.transformed);
4980         statement->base.transformed = true;
4981 #endif
4982
4983         switch (statement->kind) {
4984         case STATEMENT_INVALID:
4985                 panic("invalid statement found");
4986                 return;
4987         case STATEMENT_EMPTY:
4988                 /* nothing */
4989                 return;
4990         case STATEMENT_COMPOUND:
4991                 compound_statement_to_firm(&statement->compound);
4992                 return;
4993         case STATEMENT_RETURN:
4994                 return_statement_to_firm(&statement->returns);
4995                 return;
4996         case STATEMENT_EXPRESSION:
4997                 expression_statement_to_firm(&statement->expression);
4998                 return;
4999         case STATEMENT_IF:
5000                 if_statement_to_firm(&statement->ifs);
5001                 return;
5002         case STATEMENT_WHILE:
5003                 while_statement_to_firm(&statement->whiles);
5004                 return;
5005         case STATEMENT_DO_WHILE:
5006                 do_while_statement_to_firm(&statement->do_while);
5007                 return;
5008         case STATEMENT_DECLARATION:
5009                 declaration_statement_to_firm(&statement->declaration);
5010                 return;
5011         case STATEMENT_BREAK:
5012                 create_jump_statement(statement, get_break_label());
5013                 return;
5014         case STATEMENT_CONTINUE:
5015                 create_jump_statement(statement, continue_label);
5016                 return;
5017         case STATEMENT_SWITCH:
5018                 switch_statement_to_firm(&statement->switchs);
5019                 return;
5020         case STATEMENT_CASE_LABEL:
5021                 case_label_to_firm(&statement->case_label);
5022                 return;
5023         case STATEMENT_FOR:
5024                 for_statement_to_firm(&statement->fors);
5025                 return;
5026         case STATEMENT_LABEL:
5027                 label_to_firm(&statement->label);
5028                 return;
5029         case STATEMENT_LOCAL_LABEL:
5030                 /* local labels transform the semantics of labels while parsing
5031                  * they don't need any special treatment here */
5032                 return;
5033         case STATEMENT_GOTO:
5034                 goto_to_firm(&statement->gotos);
5035                 return;
5036         case STATEMENT_ASM:
5037                 asm_statement_to_firm(&statement->asms);
5038                 return;
5039         case STATEMENT_MS_TRY:
5040                 ms_try_statement_to_firm(&statement->ms_try);
5041                 return;
5042         case STATEMENT_LEAVE:
5043                 leave_statement_to_firm(&statement->leave);
5044                 return;
5045         }
5046         panic("Statement not implemented\n");
5047 }
5048
5049 static int count_local_variables(const entity_t *entity,
5050                                  const entity_t *const end)
5051 {
5052         int count = 0;
5053         for (; entity != end; entity = entity->base.next) {
5054                 if (entity->kind != ENTITY_VARIABLE)
5055                         continue;
5056                 type_t *type = skip_typeref(entity->declaration.type);
5057
5058                 if (!entity->variable.address_taken && is_type_scalar(type))
5059                         ++count;
5060         }
5061         return count;
5062 }
5063
5064 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5065 {
5066         int *const count = env;
5067
5068         switch (stmt->kind) {
5069         case STATEMENT_DECLARATION: {
5070                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5071                 *count += count_local_variables(decl_stmt->declarations_begin,
5072                                                                                 decl_stmt->declarations_end->base.next);
5073                 break;
5074         }
5075
5076         case STATEMENT_FOR:
5077                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5078                 break;
5079
5080         default:
5081                 break;
5082         }
5083 }
5084
5085 static int get_function_n_local_vars(entity_t *entity)
5086 {
5087         int count = 0;
5088
5089         /* count parameters */
5090         count += count_local_variables(entity->function.parameters.entities, NULL);
5091
5092         /* count local variables declared in body */
5093         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5094                         &count);
5095         return count;
5096 }
5097
5098 static void initialize_function_parameters(entity_t *entity)
5099 {
5100         assert(entity->kind == ENTITY_FUNCTION);
5101         ir_graph *irg             = current_ir_graph;
5102         ir_node  *args            = get_irg_args(irg);
5103         ir_node  *start_block     = get_irg_start_block(irg);
5104         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5105
5106         int       n         = 0;
5107         entity_t *parameter = entity->function.parameters.entities;
5108         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5109                 assert(parameter->kind == ENTITY_VARIABLE);
5110                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5111                 type_t *type = skip_typeref(parameter->declaration.type);
5112
5113                 bool needs_entity = parameter->variable.address_taken;
5114                 assert(!is_type_array(type));
5115                 if (is_type_compound(type)) {
5116                         needs_entity = true;
5117                 }
5118
5119                 if (needs_entity) {
5120                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5121                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5122                         set_entity_ident(entity, id);
5123
5124                         parameter->declaration.kind
5125                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5126                         parameter->variable.v.entity = entity;
5127                         continue;
5128                 }
5129
5130                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5131                 ir_mode *param_mode   = get_type_mode(param_irtype);
5132
5133                 long     pn    = n;
5134                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5135
5136                 ir_mode *mode = get_ir_mode(type);
5137                 value = create_conv(NULL, value, mode);
5138                 value = do_strict_conv(NULL, value);
5139
5140                 parameter->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
5141                 parameter->variable.v.value_number = next_value_number_function;
5142                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5143                                         (variable_t*) &parameter->variable);
5144                 ++next_value_number_function;
5145
5146                 set_value(parameter->variable.v.value_number, value);
5147         }
5148 }
5149
5150 /**
5151  * Handle additional decl modifiers for IR-graphs
5152  *
5153  * @param irg            the IR-graph
5154  * @param dec_modifiers  additional modifiers
5155  */
5156 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5157 {
5158         if (decl_modifiers & DM_NORETURN) {
5159                 /* TRUE if the declaration includes the Microsoft
5160                    __declspec(noreturn) specifier. */
5161                 set_irg_additional_property(irg, mtp_property_noreturn);
5162         }
5163         if (decl_modifiers & DM_NOTHROW) {
5164                 /* TRUE if the declaration includes the Microsoft
5165                    __declspec(nothrow) specifier. */
5166                 set_irg_additional_property(irg, mtp_property_nothrow);
5167         }
5168         if (decl_modifiers & DM_NAKED) {
5169                 /* TRUE if the declaration includes the Microsoft
5170                    __declspec(naked) specifier. */
5171                 set_irg_additional_property(irg, mtp_property_naked);
5172         }
5173         if (decl_modifiers & DM_FORCEINLINE) {
5174                 /* TRUE if the declaration includes the
5175                    Microsoft __forceinline specifier. */
5176                 set_irg_inline_property(irg, irg_inline_forced);
5177         }
5178         if (decl_modifiers & DM_NOINLINE) {
5179                 /* TRUE if the declaration includes the Microsoft
5180                    __declspec(noinline) specifier. */
5181                 set_irg_inline_property(irg, irg_inline_forbidden);
5182         }
5183 }
5184
5185 static void add_function_pointer(ir_type *segment, ir_entity *method,
5186                                  const char *unique_template)
5187 {
5188         ir_type   *method_type  = get_entity_type(method);
5189         ident     *id           = id_unique(unique_template);
5190         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5191
5192         ident     *ide          = id_unique(unique_template);
5193         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5194         ir_graph  *irg          = get_const_code_irg();
5195         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5196                                                            method, NULL);
5197
5198         set_entity_compiler_generated(ptr, 1);
5199         set_entity_variability(ptr, variability_constant);
5200         set_atomic_ent_value(ptr, val);
5201 }
5202
5203 /**
5204  * Generate possible IJmp branches to a given label block.
5205  */
5206 static void gen_ijmp_branches(ir_node *block) {
5207         ir_node *ijmp;
5208         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5209                 add_immBlock_pred(block, ijmp);
5210         }
5211 }
5212
5213 /**
5214  * Create code for a function.
5215  */
5216 static void create_function(entity_t *entity)
5217 {
5218         assert(entity->kind == ENTITY_FUNCTION);
5219         ir_entity *function_entity = get_function_entity(entity);
5220
5221         if (entity->function.statement == NULL)
5222                 return;
5223
5224         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5225                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5226                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5227         }
5228         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5229                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5230                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5231         }
5232
5233         current_function_entity = entity;
5234         current_function_name   = NULL;
5235         current_funcsig         = NULL;
5236
5237         assert(all_labels == NULL);
5238         all_labels = NEW_ARR_F(label_t *, 0);
5239         ijmp_list  = NULL;
5240
5241         int       n_local_vars = get_function_n_local_vars(entity);
5242         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5243
5244         ir_graph *old_current_function = current_function;
5245         current_function = irg;
5246
5247         set_irg_fp_model(irg, firm_opt.fp_model);
5248         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5249         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5250
5251         ir_node *first_block = get_cur_block();
5252
5253         /* set inline flags */
5254         if (entity->function.is_inline)
5255                 set_irg_inline_property(irg, irg_inline_recomended);
5256         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5257
5258         next_value_number_function = 0;
5259         initialize_function_parameters(entity);
5260
5261         statement_to_firm(entity->function.statement);
5262
5263         ir_node *end_block = get_irg_end_block(irg);
5264
5265         /* do we have a return statement yet? */
5266         if (get_cur_block() != NULL) {
5267                 type_t *type = skip_typeref(entity->declaration.type);
5268                 assert(is_type_function(type));
5269                 const function_type_t *func_type   = &type->function;
5270                 const type_t          *return_type
5271                         = skip_typeref(func_type->return_type);
5272
5273                 ir_node *ret;
5274                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5275                         ret = new_Return(get_store(), 0, NULL);
5276                 } else {
5277                         ir_mode *mode;
5278                         if (is_type_scalar(return_type)) {
5279                                 mode = get_ir_mode(func_type->return_type);
5280                         } else {
5281                                 mode = mode_P_data;
5282                         }
5283
5284                         ir_node *in[1];
5285                         /* §5.1.2.2.3 main implicitly returns 0 */
5286                         if (is_main(entity)) {
5287                                 in[0] = new_Const(mode, get_mode_null(mode));
5288                         } else {
5289                                 in[0] = new_Unknown(mode);
5290                         }
5291                         ret = new_Return(get_store(), 1, in);
5292                 }
5293                 add_immBlock_pred(end_block, ret);
5294         }
5295
5296         bool has_computed_gotos = false;
5297         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5298                 label_t *label = all_labels[i];
5299                 if (label->address_taken) {
5300                         gen_ijmp_branches(label->block);
5301                         has_computed_gotos = true;
5302                 }
5303                 mature_immBlock(label->block);
5304         }
5305         if (has_computed_gotos) {
5306                 /* if we have computed goto's in the function, we cannot inline it */
5307                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5308                         warningf(&entity->base.source_position,
5309                                  "function '%Y' can never be inlined because it contains a computed goto",
5310                                  entity->base.symbol);
5311                 }
5312                 set_irg_inline_property(irg, irg_inline_forbidden);
5313         }
5314
5315         DEL_ARR_F(all_labels);
5316         all_labels = NULL;
5317
5318         mature_immBlock(first_block);
5319         mature_immBlock(end_block);
5320
5321         irg_finalize_cons(irg);
5322
5323         /* finalize the frame type */
5324         ir_type *frame_type = get_irg_frame_type(irg);
5325         int      n          = get_compound_n_members(frame_type);
5326         int      align_all  = 4;
5327         int      offset     = 0;
5328         for (int i = 0; i < n; ++i) {
5329                 ir_entity *entity      = get_compound_member(frame_type, i);
5330                 ir_type   *entity_type = get_entity_type(entity);
5331
5332                 int align = get_type_alignment_bytes(entity_type);
5333                 if (align > align_all)
5334                         align_all = align;
5335                 int misalign = 0;
5336                 if (align > 0) {
5337                         misalign  = offset % align;
5338                         if (misalign > 0) {
5339                                 offset += align - misalign;
5340                         }
5341                 }
5342
5343                 set_entity_offset(entity, offset);
5344                 offset += get_type_size_bytes(entity_type);
5345         }
5346         set_type_size_bytes(frame_type, offset);
5347         set_type_alignment_bytes(frame_type, align_all);
5348
5349         irg_vrfy(irg);
5350         current_function = old_current_function;
5351
5352         /* create inner functions */
5353         entity_t *inner;
5354         for (inner = next_inner_function(); inner != NULL;
5355              inner = next_inner_function()) {
5356                 create_function(inner);
5357         }
5358 }
5359
5360 static void scope_to_firm(scope_t *scope)
5361 {
5362         /* first pass: create declarations */
5363         entity_t *entity = scope->entities;
5364         for ( ; entity != NULL; entity = entity->base.next) {
5365                 if (entity->base.symbol == NULL)
5366                         continue;
5367
5368                 if (entity->kind == ENTITY_FUNCTION) {
5369                         get_function_entity(entity);
5370                 } else if (entity->kind == ENTITY_VARIABLE) {
5371                         create_global_variable(entity);
5372                 }
5373         }
5374
5375         /* second pass: create code/initializers */
5376         entity = scope->entities;
5377         for ( ; entity != NULL; entity = entity->base.next) {
5378                 if (entity->base.symbol == NULL)
5379                         continue;
5380
5381                 if (entity->kind == ENTITY_FUNCTION) {
5382                         create_function(entity);
5383                 } else if (entity->kind == ENTITY_VARIABLE) {
5384                         assert(entity->declaration.kind
5385                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5386                         current_ir_graph = get_const_code_irg();
5387                         create_variable_initializer(entity);
5388                 }
5389         }
5390 }
5391
5392 void init_ast2firm(void)
5393 {
5394         obstack_init(&asm_obst);
5395         init_atomic_modes();
5396
5397         /* OS option must be set to the backend */
5398         switch (firm_opt.os_support) {
5399         case OS_SUPPORT_MINGW:
5400                 create_ld_ident = create_name_win32;
5401                 break;
5402         case OS_SUPPORT_LINUX:
5403                 create_ld_ident = create_name_linux_elf;
5404                 break;
5405         case OS_SUPPORT_MACHO:
5406                 create_ld_ident = create_name_macho;
5407                 break;
5408         default:
5409                 panic("unexpected OS support mode");
5410         }
5411
5412         /* create idents for all known runtime functions */
5413         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5414                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5415         }
5416
5417         entitymap_init(&entitymap);
5418 }
5419
5420 static void init_ir_types(void)
5421 {
5422         static int ir_types_initialized = 0;
5423         if (ir_types_initialized)
5424                 return;
5425         ir_types_initialized = 1;
5426
5427         ir_type_int        = get_ir_type(type_int);
5428         ir_type_const_char = get_ir_type(type_const_char);
5429         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5430         ir_type_void       = get_ir_type(type_void);
5431 }
5432
5433 void exit_ast2firm(void)
5434 {
5435         entitymap_destroy(&entitymap);
5436         obstack_free(&asm_obst, NULL);
5437 }
5438
5439 static void global_asm_to_firm(statement_t *s)
5440 {
5441         for (; s != NULL; s = s->base.next) {
5442                 assert(s->kind == STATEMENT_ASM);
5443
5444                 char const *const text = s->asms.asm_text.begin;
5445                 size_t            size = s->asms.asm_text.size;
5446
5447                 /* skip the last \0 */
5448                 if (text[size - 1] == '\0')
5449                         --size;
5450
5451                 ident *const id = new_id_from_chars(text, size);
5452                 add_irp_asm(id);
5453         }
5454 }
5455
5456 void translation_unit_to_firm(translation_unit_t *unit)
5457 {
5458         /* just to be sure */
5459         continue_label           = NULL;
5460         break_label              = NULL;
5461         current_switch_cond      = NULL;
5462         current_translation_unit = unit;
5463
5464         init_ir_types();
5465         inner_functions = NEW_ARR_F(entity_t *, 0);
5466
5467         scope_to_firm(&unit->scope);
5468         global_asm_to_firm(unit->global_asm);
5469
5470         DEL_ARR_F(inner_functions);
5471         inner_functions  = NULL;
5472
5473         current_ir_graph         = NULL;
5474         current_translation_unit = NULL;
5475 }