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