nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "symbol_t.h"
  36 #include "token_t.h"
  37 #include "type_t.h"
  38 #include "ast_t.h"
  39 #include "entity_t.h"
  40 #include "parser.h"
  41 #include "diagnostic.h"
  42 #include "lang_features.h"
  43 #include "types.h"
  44 #include "type_hash.h"
  45 #include "mangle.h"
  46 #include "walk_statements.h"
  47 #include "warning.h"
  48 #include "entitymap_t.h"
  49 #include "driver/firm_opt.h"
  50 #include "driver/firm_cmdline.h"
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  56
  57 static int        next_value_number_function;
  58 static ir_node   *continue_label;
  59 static ir_node   *break_label;
  60 static ir_node   *current_switch_cond;
  61 static bool       saw_default_label;
  62 static label_t  **all_labels;
  63 static entity_t **inner_functions;
  64 static ir_node   *ijmp_list;
  65 static bool       constant_folding;
  66
  67 extern bool       have_const_functions;
  68
  69 static const entity_t     *current_function_entity;
  70 static ir_node            *current_function_name;
  71 static ir_node            *current_funcsig;
  72 static switch_statement_t *current_switch;
  73 static ir_graph           *current_function;
  74 static translation_unit_t *current_translation_unit;
  75
  76 static entitymap_t  entitymap;
  77
  78 static struct obstack asm_obst;
  79
  80 typedef enum declaration_kind_t {
  81         DECLARATION_KIND_UNKNOWN,
  82         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  83         DECLARATION_KIND_GLOBAL_VARIABLE,
  84         DECLARATION_KIND_LOCAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  86         DECLARATION_KIND_PARAMETER,
  87         DECLARATION_KIND_PARAMETER_ENTITY,
  88         DECLARATION_KIND_FUNCTION,
  89         DECLARATION_KIND_COMPOUND_MEMBER,
  90         DECLARATION_KIND_INNER_FUNCTION
  91 } declaration_kind_t;
  92
  93 static ir_mode *get_ir_mode(type_t *type);
  94 static ir_type *get_ir_type_incomplete(type_t *type);
  95
  96 static void enqueue_inner_function(entity_t *entity)
  97 {
  98         ARR_APP1(entity_t*, inner_functions, entity);
  99 }
 100
 101 static entity_t *next_inner_function(void)
 102 {
 103         int len = ARR_LEN(inner_functions);
 104         if (len == 0)
 105                 return NULL;
 106
 107         entity_t *entity = inner_functions[len-1];
 108         ARR_SHRINKLEN(inner_functions, len-1);
 109
 110         return entity;
 111 }
 112
 113 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 114 {
 115         const entity_t *entity = get_irg_loc_description(irg, pos);
 116
 117         if (entity != NULL) {
 118                 warningf(&entity->base.source_position,
 119                          "%s '%#T' might be used uninitialized",
 120                          get_entity_kind_name(entity->kind),
 121                          entity->declaration.type, entity->base.symbol);
 122         }
 123         return new_r_Unknown(irg, mode);
 124 }
 125
 126 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 127 {
 128         const source_position_t *pos = (const source_position_t*) dbg;
 129         if (pos == NULL)
 130                 return 0;
 131         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 132                                    pos->linenr);
 133 }
 134
 135 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 136 {
 137         const source_position_t *pos = (const source_position_t*) dbg;
 138         if (pos == NULL)
 139                 return NULL;
 140         if (line != NULL)
 141                 *line = pos->linenr;
 142         return pos->input_name;
 143 }
 144
 145 static dbg_info *get_dbg_info(const source_position_t *pos)
 146 {
 147         return (dbg_info*) pos;
 148 }
 149
 150 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 151
 152 static ir_mode *mode_int, *mode_uint;
 153
 154 static ir_node *_expression_to_firm(const expression_t *expression);
 155 static ir_node *expression_to_firm(const expression_t *expression);
 156 static void create_local_declaration(entity_t *entity);
 157
 158 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 159 {
 160         unsigned flags = get_atomic_type_flags(kind);
 161         unsigned size  = get_atomic_type_size(kind);
 162         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 163                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 164                 char            name[64];
 165                 ir_mode_sort    sort;
 166                 unsigned        bit_size     = size * 8;
 167                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 168                 unsigned        modulo_shift;
 169                 ir_mode_arithmetic arithmetic;
 170
 171                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 172                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 173                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 174                                  bit_size);
 175                         sort         = irms_int_number;
 176                         arithmetic   = irma_twos_complement;
 177                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 178                 } else {
 179                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 180                         snprintf(name, sizeof(name), "F%u", bit_size);
 181                         sort         = irms_float_number;
 182                         arithmetic   = irma_ieee754;
 183                         modulo_shift = 0;
 184                 }
 185                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 186                                    modulo_shift);
 187         }
 188
 189         return NULL;
 190 }
 191
 192 /**
 193  * Initialises the atomic modes depending on the machine size.
 194  */
 195 static void init_atomic_modes(void)
 196 {
 197         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 198                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 199         }
 200         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 201         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 202
 203         /* there's no real void type in firm */
 204         atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 205
 206         /* initialize pointer modes */
 207         char            name[64];
 208         ir_mode_sort    sort         = irms_reference;
 209         unsigned        bit_size     = machine_size;
 210         bool            is_signed    = 0;
 211         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 212         unsigned        modulo_shift
 213                 = bit_size < machine_size ? machine_size : bit_size;
 214
 215         snprintf(name, sizeof(name), "p%u", machine_size);
 216         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 217                                         modulo_shift);
 218
 219         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 220         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 221
 222         /* Hmm, pointers should be machine size */
 223         set_modeP_data(ptr_mode);
 224         set_modeP_code(ptr_mode);
 225 }
 226
 227 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 228 {
 229         assert(kind <= ATOMIC_TYPE_LAST);
 230         return atomic_modes[kind];
 231 }
 232
 233 static unsigned get_compound_type_size(compound_type_t *type)
 234 {
 235         ir_type *irtype = get_ir_type((type_t*) type);
 236         return get_type_size_bytes(irtype);
 237 }
 238
 239 static unsigned get_array_type_size(array_type_t *type)
 240 {
 241         assert(!type->is_vla);
 242         ir_type *irtype = get_ir_type((type_t*) type);
 243         return get_type_size_bytes(irtype);
 244 }
 245
 246 static unsigned get_type_size_const(type_t *type)
 247 {
 248         switch(type->kind) {
 249         case TYPE_ERROR:
 250                 panic("error type occurred");
 251         case TYPE_ATOMIC:
 252                 return get_atomic_type_size(type->atomic.akind);
 253         case TYPE_COMPLEX:
 254                 return 2 * get_atomic_type_size(type->complex.akind);
 255         case TYPE_IMAGINARY:
 256                 return get_atomic_type_size(type->imaginary.akind);
 257         case TYPE_ENUM:
 258                 return get_mode_size_bytes(mode_int);
 259         case TYPE_COMPOUND_UNION:
 260         case TYPE_COMPOUND_STRUCT:
 261                 return get_compound_type_size(&type->compound);
 262         case TYPE_FUNCTION:
 263                 /* just a pointer to the function */
 264                 return get_mode_size_bytes(mode_P_code);
 265         case TYPE_POINTER:
 266         case TYPE_REFERENCE:
 267                 return get_mode_size_bytes(mode_P_data);
 268         case TYPE_ARRAY:
 269                 return get_array_type_size(&type->array);
 270         case TYPE_BUILTIN:
 271                 return get_type_size_const(type->builtin.real_type);
 272         case TYPE_BITFIELD:
 273                 panic("type size of bitfield request");
 274         case TYPE_TYPEDEF:
 275         case TYPE_TYPEOF:
 276         case TYPE_INVALID:
 277                 break;
 278         }
 279         panic("Trying to determine size of invalid type");
 280 }
 281
 282 static ir_node *get_type_size(type_t *type)
 283 {
 284         type = skip_typeref(type);
 285
 286         if (is_type_array(type) && type->array.is_vla) {
 287                 ir_node *size_node = type->array.size_node;
 288                 if (size_node == NULL) {
 289                         size_node = expression_to_firm(type->array.size_expression);
 290                         assert(!is_Const(size_node));
 291                         type->array.size_node = size_node;
 292                 }
 293
 294                 ir_node *elem_size = get_type_size(type->array.element_type);
 295                 ir_mode *mode      = get_irn_mode(size_node);
 296                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 297                 return real_size;
 298         }
 299
 300         ir_mode *mode = get_ir_mode(type_size_t);
 301         symconst_symbol sym;
 302         sym.type_p = get_ir_type(type);
 303         return new_SymConst(mode, sym, symconst_type_size);
 304 }
 305
 306 static unsigned count_parameters(const function_type_t *function_type)
 307 {
 308         unsigned count = 0;
 309
 310         function_parameter_t *parameter = function_type->parameters;
 311         for ( ; parameter != NULL; parameter = parameter->next) {
 312                 ++count;
 313         }
 314
 315         return count;
 316 }
 317
 318 /**
 319  * Creates a Firm type for an atomic type
 320  */
 321 static ir_type *create_atomic_type(const atomic_type_t *type)
 322 {
 323         atomic_type_kind_t  kind   = type->akind;
 324         ir_mode            *mode   = atomic_modes[kind];
 325         ident              *id     = get_mode_ident(mode);
 326         ir_type            *irtype = new_type_primitive(id, mode);
 327
 328         set_type_alignment_bytes(irtype, type->base.alignment);
 329
 330         return irtype;
 331 }
 332
 333 /**
 334  * Creates a Firm type for a complex type
 335  */
 336 static ir_type *create_complex_type(const complex_type_t *type)
 337 {
 338         atomic_type_kind_t  kind = type->akind;
 339         ir_mode            *mode = atomic_modes[kind];
 340         ident              *id   = get_mode_ident(mode);
 341
 342         (void) id;
 343
 344         /* FIXME: finish the array */
 345         return NULL;
 346 }
 347
 348 /**
 349  * Creates a Firm type for an imaginary type
 350  */
 351 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 352 {
 353         atomic_type_kind_t  kind      = type->akind;
 354         ir_mode            *mode      = atomic_modes[kind];
 355         ident              *id        = get_mode_ident(mode);
 356         ir_type            *irtype    = new_type_primitive(id, mode);
 357
 358         set_type_alignment_bytes(irtype, type->base.alignment);
 359
 360         return irtype;
 361 }
 362
 363 /**
 364  * return type of a parameter (and take transparent union gnu extension into
 365  * account)
 366  */
 367 static type_t *get_parameter_type(type_t *type)
 368 {
 369         type = skip_typeref(type);
 370         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 371                 compound_t *compound = type->compound.compound;
 372                 type                 = compound->members.entities->declaration.type;
 373         }
 374
 375         return type;
 376 }
 377
 378 static ir_type *create_method_type(const function_type_t *function_type)
 379 {
 380         type_t  *return_type  = skip_typeref(function_type->return_type);
 381
 382         ident   *id           = id_unique("functiontype.%u");
 383         int      n_parameters = count_parameters(function_type);
 384         int      n_results    = return_type == type_void ? 0 : 1;
 385         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 386
 387         if (return_type != type_void) {
 388                 ir_type *restype = get_ir_type(return_type);
 389                 set_method_res_type(irtype, 0, restype);
 390         }
 391
 392         function_parameter_t *parameter = function_type->parameters;
 393         int                   n         = 0;
 394         for ( ; parameter != NULL; parameter = parameter->next) {
 395                 type_t  *type     = get_parameter_type(parameter->type);
 396                 ir_type *p_irtype = get_ir_type(type);
 397                 set_method_param_type(irtype, n, p_irtype);
 398                 ++n;
 399         }
 400
 401         if (function_type->variadic || function_type->unspecified_parameters) {
 402                 set_method_variadicity(irtype, variadicity_variadic);
 403         }
 404
 405         unsigned cc = get_method_calling_convention(irtype);
 406         switch (function_type->calling_convention) {
 407         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 408         case CC_CDECL:
 409 is_cdecl:
 410                 set_method_calling_convention(irtype, SET_CDECL(cc));
 411                 break;
 412
 413         case CC_STDCALL:
 414                 if (function_type->variadic || function_type->unspecified_parameters)
 415                         goto is_cdecl;
 416
 417                 /* only non-variadic function can use stdcall, else use cdecl */
 418                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 419                 break;
 420
 421         case CC_FASTCALL:
 422                 if (function_type->variadic || function_type->unspecified_parameters)
 423                         goto is_cdecl;
 424                 /* only non-variadic function can use fastcall, else use cdecl */
 425                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 426                 break;
 427
 428         case CC_THISCALL:
 429                 /* Hmm, leave default, not accepted by the parser yet. */
 430                 break;
 431         }
 432
 433         return irtype;
 434 }
 435
 436 static ir_type *create_pointer_type(pointer_type_t *type)
 437 {
 438         type_t   *points_to    = type->points_to;
 439         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 440         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 441                                                   ir_points_to, mode_P_data);
 442
 443         return ir_type;
 444 }
 445
 446 static ir_type *create_reference_type(reference_type_t *type)
 447 {
 448         type_t  *refers_to    = type->refers_to;
 449         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 450         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 451                                                  ir_refers_to, mode_P_data);
 452
 453         return ir_type;
 454 }
 455
 456 static ir_type *create_array_type(array_type_t *type)
 457 {
 458         type_t  *element_type    = type->element_type;
 459         ir_type *ir_element_type = get_ir_type(element_type);
 460
 461         ident    *id      = id_unique("array.%u");
 462         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 463
 464         const int align = get_type_alignment_bytes(ir_element_type);
 465         set_type_alignment_bytes(ir_type, align);
 466
 467         if (type->size_constant) {
 468                 int n_elements = type->size;
 469
 470                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 471
 472                 size_t elemsize = get_type_size_bytes(ir_element_type);
 473                 if (elemsize % align > 0) {
 474                         elemsize += align - (elemsize % align);
 475                 }
 476                 set_type_size_bytes(ir_type, n_elements * elemsize);
 477         } else {
 478                 set_array_lower_bound_int(ir_type, 0, 0);
 479         }
 480         set_type_state(ir_type, layout_fixed);
 481
 482         return ir_type;
 483 }
 484
 485 /**
 486  * Return the signed integer type of size bits.
 487  *
 488  * @param size   the size
 489  */
 490 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 491                                                  unsigned size)
 492 {
 493         static ir_mode *s_modes[64 + 1] = {NULL, };
 494         ir_type *res;
 495         ir_mode *mode;
 496
 497         if (size <= 0 || size > 64)
 498                 return NULL;
 499
 500         mode = s_modes[size];
 501         if (mode == NULL) {
 502                 char name[32];
 503
 504                 snprintf(name, sizeof(name), "bf_I%u", size);
 505                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 506                                    size <= 32 ? 32 : size );
 507                 s_modes[size] = mode;
 508         }
 509
 510         char name[32];
 511         snprintf(name, sizeof(name), "I%u", size);
 512         ident *id = new_id_from_str(name);
 513         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 514         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 515         set_primitive_base_type(res, base_tp);
 516
 517         return res;
 518 }
 519
 520 /**
 521  * Return the unsigned integer type of size bits.
 522  *
 523  * @param size   the size
 524  */
 525 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 526                                                    unsigned size)
 527 {
 528         static ir_mode *u_modes[64 + 1] = {NULL, };
 529         ir_type *res;
 530         ir_mode *mode;
 531
 532         if (size <= 0 || size > 64)
 533                 return NULL;
 534
 535         mode = u_modes[size];
 536         if (mode == NULL) {
 537                 char name[32];
 538
 539                 snprintf(name, sizeof(name), "bf_U%u", size);
 540                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 541                                    size <= 32 ? 32 : size );
 542                 u_modes[size] = mode;
 543         }
 544
 545         char name[32];
 546
 547         snprintf(name, sizeof(name), "U%u", size);
 548         ident *id = new_id_from_str(name);
 549         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 550         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 551         set_primitive_base_type(res, base_tp);
 552
 553         return res;
 554 }
 555
 556 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 557 {
 558         type_t *base = skip_typeref(type->base_type);
 559         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 560         ir_type *irbase = get_ir_type(base);
 561
 562         unsigned size = type->bit_size;
 563
 564         assert(!is_type_float(base));
 565         if (is_type_signed(base)) {
 566                 return get_signed_int_type_for_bit_size(irbase, size);
 567         } else {
 568                 return get_unsigned_int_type_for_bit_size(irbase, size);
 569         }
 570 }
 571
 572 #define INVALID_TYPE ((ir_type_ptr)-1)
 573
 574 enum {
 575         COMPOUND_IS_STRUCT = false,
 576         COMPOUND_IS_UNION  = true
 577 };
 578
 579 /**
 580  * Construct firm type from ast struct type.
 581  *
 582  * As anonymous inner structs get flattened to a single firm type, we might get
 583  * irtype, outer_offset and out_align passed (they represent the position of
 584  * the anonymous inner struct inside the resulting firm struct)
 585  */
 586 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 587                                      size_t *outer_offset, size_t *outer_align,
 588                                      bool incomplete, bool is_union)
 589 {
 590         compound_t *compound = type->compound;
 591
 592         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 593                 return compound->irtype;
 594         }
 595
 596         size_t align_all  = 1;
 597         size_t offset     = 0;
 598         size_t bit_offset = 0;
 599         size_t size       = 0;
 600
 601         if (irtype == NULL) {
 602                 symbol_t *symbol = compound->base.symbol;
 603                 ident    *id;
 604                 if (symbol != NULL) {
 605                         id = new_id_from_str(symbol->string);
 606                 } else {
 607                         if (is_union) {
 608                                 id = id_unique("__anonymous_union.%u");
 609                         } else {
 610                                 id = id_unique("__anonymous_struct.%u");
 611                         }
 612                 }
 613                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 614
 615                 if (is_union) {
 616                         irtype = new_d_type_union(id, dbgi);
 617                 } else {
 618                         irtype = new_d_type_struct(id, dbgi);
 619                 }
 620
 621                 compound->irtype_complete = false;
 622                 compound->irtype          = irtype;
 623         } else {
 624                 offset    = *outer_offset;
 625                 align_all = *outer_align;
 626         }
 627
 628         if (incomplete)
 629                 return irtype;
 630
 631         compound->irtype_complete = true;
 632
 633         entity_t *entry = compound->members.entities;
 634         for ( ; entry != NULL; entry = entry->base.next) {
 635                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 636                         continue;
 637
 638                 size_t prev_offset = offset;
 639
 640                 symbol_t *symbol     = entry->base.symbol;
 641                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 642                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 643
 644                 ident    *ident;
 645                 if (symbol != NULL) {
 646                         ident = new_id_from_str(symbol->string);
 647                 } else {
 648                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 649                                 create_compound_type(&entry_type->compound, irtype, &offset,
 650                                                      &align_all, false, COMPOUND_IS_STRUCT);
 651                                 goto finished_member;
 652                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 653                                 create_compound_type(&entry_type->compound, irtype, &offset,
 654                                                      &align_all, false, COMPOUND_IS_UNION);
 655                                 goto finished_member;
 656                         } else {
 657                                 assert(entry_type->kind == TYPE_BITFIELD);
 658                         }
 659                         ident = id_unique("anon.%u");
 660                 }
 661
 662                 ir_type *base_irtype;
 663                 if (entry_type->kind == TYPE_BITFIELD) {
 664                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 665                 } else {
 666                         base_irtype = get_ir_type(entry_type);
 667                 }
 668
 669                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 670                 size_t misalign        = offset % entry_alignment;
 671
 672                 ir_type   *entry_irtype = get_ir_type(entry_type);
 673                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 674
 675                 size_t base;
 676                 size_t bits_remainder;
 677                 if (entry_type->kind == TYPE_BITFIELD) {
 678                         size_t size_bits      = entry_type->bitfield.bit_size;
 679                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 680
 681                         if (size_bits > rest_size_bits) {
 682                                 /* start a new bucket */
 683                                 offset     += entry_alignment - misalign;
 684                                 bit_offset  = 0;
 685
 686                                 base           = offset;
 687                                 bits_remainder = 0;
 688                         } else {
 689                                 /* put into current bucket */
 690                                 base           = offset - misalign;
 691                                 bits_remainder = misalign * 8 + bit_offset;
 692                         }
 693
 694                         offset     += size_bits / 8;
 695                         bit_offset  = bit_offset + (size_bits % 8);
 696                 } else {
 697                         size_t entry_size = get_type_size_bytes(base_irtype);
 698                         if (misalign > 0 || bit_offset > 0)
 699                                 offset += entry_alignment - misalign;
 700
 701                         base           = offset;
 702                         bits_remainder = 0;
 703                         offset        += entry_size;
 704                         bit_offset     = 0;
 705                 }
 706
 707                 if (entry_alignment > align_all) {
 708                         if (entry_alignment % align_all != 0) {
 709                                 panic("uneven alignments not supported yet");
 710                         }
 711                         align_all = entry_alignment;
 712                 }
 713
 714                 set_entity_offset(entity, base);
 715                 set_entity_offset_bits_remainder(entity,
 716                                                  (unsigned char) bits_remainder);
 717                 //add_struct_member(irtype, entity);
 718                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 719                 assert(entry->compound_member.entity == NULL);
 720                 entry->compound_member.entity = entity;
 721
 722 finished_member:
 723                 if (is_union) {
 724                         size_t entry_size = offset - prev_offset;
 725                         if (entry_size > size) {
 726                                 size = entry_size;
 727                         }
 728                         offset     = 0;
 729                         bit_offset = 0;
 730                 }
 731         }
 732
 733         if (!is_union) {
 734                 size = offset;
 735         }
 736
 737         size_t misalign = offset % align_all;
 738         if (misalign > 0 || bit_offset > 0) {
 739                 size += align_all - misalign;
 740         }
 741
 742         if (outer_offset != NULL) {
 743                 if (!is_union) {
 744                         *outer_offset = offset;
 745                 } else {
 746                         *outer_offset += size;
 747                 }
 748
 749                 if (align_all > *outer_align) {
 750                         if (align_all % *outer_align != 0) {
 751                                 panic("uneven alignments not supported yet");
 752                         }
 753                         *outer_align = align_all;
 754                 }
 755         } else {
 756                 set_type_alignment_bytes(irtype, align_all);
 757                 set_type_size_bytes(irtype, size);
 758                 set_type_state(irtype, layout_fixed);
 759         }
 760
 761         return irtype;
 762 }
 763
 764 static ir_type *create_enum_type(enum_type_t *const type)
 765 {
 766         type->base.firm_type = ir_type_int;
 767
 768         ir_mode *const mode    = mode_int;
 769         tarval  *const one     = get_mode_one(mode);
 770         tarval  *      tv_next = get_tarval_null(mode);
 771
 772         bool constant_folding_old = constant_folding;
 773         constant_folding = true;
 774
 775         enum_t   *enume = type->enume;
 776         entity_t *entry = enume->base.next;
 777         for (; entry != NULL; entry = entry->base.next) {
 778                 if (entry->kind != ENTITY_ENUM_VALUE)
 779                         break;
 780
 781                 expression_t *const init = entry->enum_value.value;
 782                 if (init != NULL) {
 783                         ir_node *const cnst = expression_to_firm(init);
 784                         if (!is_Const(cnst)) {
 785                                 panic("couldn't fold constant");
 786                         }
 787                         tv_next = get_Const_tarval(cnst);
 788                 }
 789                 entry->enum_value.tv = tv_next;
 790                 tv_next = tarval_add(tv_next, one);
 791         }
 792
 793         constant_folding = constant_folding_old;
 794
 795         return ir_type_int;
 796 }
 797
 798 static ir_type *get_ir_type_incomplete(type_t *type)
 799 {
 800         assert(type != NULL);
 801         type = skip_typeref(type);
 802
 803         if (type->base.firm_type != NULL) {
 804                 assert(type->base.firm_type != INVALID_TYPE);
 805                 return type->base.firm_type;
 806         }
 807
 808         switch (type->kind) {
 809         case TYPE_COMPOUND_STRUCT:
 810                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 811                                             true, COMPOUND_IS_STRUCT);
 812         case TYPE_COMPOUND_UNION:
 813                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 814                                             true, COMPOUND_IS_UNION);
 815         default:
 816                 return get_ir_type(type);
 817         }
 818 }
 819
 820 ir_type *get_ir_type(type_t *type)
 821 {
 822         assert(type != NULL);
 823
 824         type = skip_typeref(type);
 825
 826         if (type->base.firm_type != NULL) {
 827                 assert(type->base.firm_type != INVALID_TYPE);
 828                 return type->base.firm_type;
 829         }
 830
 831         ir_type *firm_type = NULL;
 832         switch (type->kind) {
 833         case TYPE_ERROR:
 834                 /* Happens while constant folding, when there was an error */
 835                 return create_atomic_type(&type_void->atomic);
 836
 837         case TYPE_ATOMIC:
 838                 firm_type = create_atomic_type(&type->atomic);
 839                 break;
 840         case TYPE_COMPLEX:
 841                 firm_type = create_complex_type(&type->complex);
 842                 break;
 843         case TYPE_IMAGINARY:
 844                 firm_type = create_imaginary_type(&type->imaginary);
 845                 break;
 846         case TYPE_FUNCTION:
 847                 firm_type = create_method_type(&type->function);
 848                 break;
 849         case TYPE_POINTER:
 850                 firm_type = create_pointer_type(&type->pointer);
 851                 break;
 852         case TYPE_REFERENCE:
 853                 firm_type = create_reference_type(&type->reference);
 854                 break;
 855         case TYPE_ARRAY:
 856                 firm_type = create_array_type(&type->array);
 857                 break;
 858         case TYPE_COMPOUND_STRUCT:
 859                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 860                                                  false, COMPOUND_IS_STRUCT);
 861                 break;
 862         case TYPE_COMPOUND_UNION:
 863                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 864                                                  false, COMPOUND_IS_UNION);
 865                 break;
 866         case TYPE_ENUM:
 867                 firm_type = create_enum_type(&type->enumt);
 868                 break;
 869         case TYPE_BUILTIN:
 870                 firm_type = get_ir_type(type->builtin.real_type);
 871                 break;
 872         case TYPE_BITFIELD:
 873                 firm_type = create_bitfield_type(&type->bitfield);
 874                 break;
 875
 876         case TYPE_TYPEOF:
 877         case TYPE_TYPEDEF:
 878         case TYPE_INVALID:
 879                 break;
 880         }
 881         if (firm_type == NULL)
 882                 panic("unknown type found");
 883
 884         type->base.firm_type = firm_type;
 885         return firm_type;
 886 }
 887
 888 ir_mode *get_ir_mode(type_t *type)
 889 {
 890         ir_type *irtype = get_ir_type(type);
 891
 892         /* firm doesn't report a mode for arrays somehow... */
 893         if (is_Array_type(irtype)) {
 894                 return mode_P_data;
 895         }
 896
 897         ir_mode *mode = get_type_mode(irtype);
 898         assert(mode != NULL);
 899         return mode;
 900 }
 901
 902 /** Names of the runtime functions. */
 903 static const struct {
 904         int        id;           /**< the rts id */
 905         int        n_res;        /**< number of return values */
 906         const char *name;        /**< the name of the rts function */
 907         int        n_params;     /**< number of parameters */
 908         unsigned   flags;        /**< language flags */
 909 } rts_data[] = {
 910         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 911         { rts_abort,      0, "abort",        0, _C89 },
 912         { rts_alloca,     1, "alloca",       1, _ALL },
 913         { rts_abs,        1, "abs",          1, _C89 },
 914         { rts_labs,       1, "labs",         1, _C89 },
 915         { rts_llabs,      1, "llabs",        1, _C99 },
 916         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 917
 918         { rts_fabs,       1, "fabs",         1, _C89 },
 919         { rts_sqrt,       1, "sqrt",         1, _C89 },
 920         { rts_cbrt,       1, "cbrt",         1, _C99 },
 921         { rts_exp,        1, "exp",          1, _C89 },
 922         { rts_exp2,       1, "exp2",         1, _C89 },
 923         { rts_exp10,      1, "exp10",        1, _GNUC },
 924         { rts_log,        1, "log",          1, _C89 },
 925         { rts_log2,       1, "log2",         1, _C89 },
 926         { rts_log10,      1, "log10",        1, _C89 },
 927         { rts_pow,        1, "pow",          2, _C89 },
 928         { rts_sin,        1, "sin",          1, _C89 },
 929         { rts_cos,        1, "cos",          1, _C89 },
 930         { rts_tan,        1, "tan",          1, _C89 },
 931         { rts_asin,       1, "asin",         1, _C89 },
 932         { rts_acos,       1, "acos",         1, _C89 },
 933         { rts_atan,       1, "atan",         1, _C89 },
 934         { rts_sinh,       1, "sinh",         1, _C89 },
 935         { rts_cosh,       1, "cosh",         1, _C89 },
 936         { rts_tanh,       1, "tanh",         1, _C89 },
 937
 938         { rts_fabsf,      1, "fabsf",        1, _C99 },
 939         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 940         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 941         { rts_expf,       1, "expf",         1, _C99 },
 942         { rts_exp2f,      1, "exp2f",        1, _C99 },
 943         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 944         { rts_logf,       1, "logf",         1, _C99 },
 945         { rts_log2f,      1, "log2f",        1, _C99 },
 946         { rts_log10f,     1, "log10f",       1, _C99 },
 947         { rts_powf,       1, "powf",         2, _C99 },
 948         { rts_sinf,       1, "sinf",         1, _C99 },
 949         { rts_cosf,       1, "cosf",         1, _C99 },
 950         { rts_tanf,       1, "tanf",         1, _C99 },
 951         { rts_asinf,      1, "asinf",        1, _C99 },
 952         { rts_acosf,      1, "acosf",        1, _C99 },
 953         { rts_atanf,      1, "atanf",        1, _C99 },
 954         { rts_sinhf,      1, "sinhf",        1, _C99 },
 955         { rts_coshf,      1, "coshf",        1, _C99 },
 956         { rts_tanhf,      1, "tanhf",        1, _C99 },
 957
 958         { rts_fabsl,      1, "fabsl",        1, _C99 },
 959         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 960         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 961         { rts_expl,       1, "expl",         1, _C99 },
 962         { rts_exp2l,      1, "exp2l",        1, _C99 },
 963         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 964         { rts_logl,       1, "logl",         1, _C99 },
 965         { rts_log2l,      1, "log2l",        1, _C99 },
 966         { rts_log10l,     1, "log10l",       1, _C99 },
 967         { rts_powl,       1, "powl",         2, _C99 },
 968         { rts_sinl,       1, "sinl",         1, _C99 },
 969         { rts_cosl,       1, "cosl",         1, _C99 },
 970         { rts_tanl,       1, "tanl",         1, _C99 },
 971         { rts_asinl,      1, "asinl",        1, _C99 },
 972         { rts_acosl,      1, "acosl",        1, _C99 },
 973         { rts_atanl,      1, "atanl",        1, _C99 },
 974         { rts_sinhl,      1, "sinhl",        1, _C99 },
 975         { rts_coshl,      1, "coshl",        1, _C99 },
 976         { rts_tanhl,      1, "tanhl",        1, _C99 },
 977
 978         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 979         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 980         { rts_strcmp,     1, "strcmp",       2, _C89 },
 981         { rts_strncmp,    1, "strncmp",      3, _C89 }
 982 };
 983
 984 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 985
 986 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 987
 988 /**
 989  * Handle GNU attributes for entities
 990  *
 991  * @param ent   the entity
 992  * @param decl  the routine declaration
 993  */
 994 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
 995 {
 996         assert(is_declaration(entity));
 997         decl_modifiers_t modifiers = entity->declaration.modifiers;
 998         if (modifiers & DM_PURE) {
 999                 /* TRUE if the declaration includes the GNU
1000                    __attribute__((pure)) specifier. */
1001                 set_entity_additional_property(irentity, mtp_property_pure);
1002         }
1003         if (modifiers & DM_CONST) {
1004                 set_entity_additional_property(irentity, mtp_property_const);
1005                 have_const_functions = true;
1006         }
1007         if (modifiers & DM_USED) {
1008                 /* TRUE if the declaration includes the GNU
1009                    __attribute__((used)) specifier. */
1010                 set_entity_stickyness(irentity, stickyness_sticky);
1011         }
1012 }
1013
1014 static bool is_main(entity_t *entity)
1015 {
1016         static symbol_t *sym_main = NULL;
1017         if (sym_main == NULL) {
1018                 sym_main = symbol_table_insert("main");
1019         }
1020
1021         if (entity->base.symbol != sym_main)
1022                 return false;
1023         /* must be in outermost scope */
1024         if (entity->base.parent_scope != &current_translation_unit->scope)
1025                 return false;
1026
1027         return true;
1028 }
1029
1030 /**
1031  * Creates an entity representing a function.
1032  *
1033  * @param declaration  the function declaration
1034  */
1035 static ir_entity *get_function_entity(entity_t *entity)
1036 {
1037         assert(entity->kind == ENTITY_FUNCTION);
1038         if (entity->function.entity != NULL) {
1039                 return entity->function.entity;
1040         }
1041
1042         if (is_main(entity)) {
1043                 /* force main to C linkage */
1044                 type_t *type = entity->declaration.type;
1045                 assert(is_type_function(type));
1046                 if (type->function.linkage != LINKAGE_C) {
1047                         type_t *new_type           = duplicate_type(type);
1048                         new_type->function.linkage = LINKAGE_C;
1049
1050                         type = typehash_insert(new_type);
1051                         if (type != new_type) {
1052                                 obstack_free(type_obst, new_type);
1053                         }
1054                         entity->declaration.type = type;
1055                 }
1056         }
1057
1058         symbol_t *symbol = entity->base.symbol;
1059         ident    *id     = new_id_from_str(symbol->string);
1060
1061         ir_type   *global_type    = get_glob_type();
1062         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1063         bool const has_body       = entity->function.statement != NULL;
1064
1065         /* already an entity defined? */
1066         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1067         if (irentity != NULL) {
1068                 if (get_entity_visibility(irentity) == visibility_external_allocated
1069                                 && has_body) {
1070                         set_entity_visibility(irentity, visibility_external_visible);
1071                 }
1072                 goto entity_created;
1073         }
1074
1075         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1076         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1077         set_entity_ld_ident(irentity, create_ld_ident(entity));
1078
1079         handle_gnu_attributes_ent(irentity, entity);
1080
1081         /* static inline             => local
1082          * extern inline             => local
1083          * inline without definition => local
1084          * inline with definition    => external_visible */
1085         storage_class_tag_t const storage_class
1086                 = (storage_class_tag_t) entity->declaration.storage_class;
1087         bool                const is_inline     = entity->function.is_inline;
1088         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1089                 set_entity_visibility(irentity, visibility_external_visible);
1090         } else if (storage_class == STORAGE_CLASS_STATIC ||
1091                    (is_inline && has_body)) {
1092                 if (!has_body) {
1093                         /* this entity was declared, but is defined nowhere */
1094                         set_entity_peculiarity(irentity, peculiarity_description);
1095                 }
1096                 set_entity_visibility(irentity, visibility_local);
1097         } else if (has_body) {
1098                 set_entity_visibility(irentity, visibility_external_visible);
1099         } else {
1100                 set_entity_visibility(irentity, visibility_external_allocated);
1101         }
1102         set_entity_allocation(irentity, allocation_static);
1103
1104         /* We should check for file scope here, but as long as we compile C only
1105            this is not needed. */
1106         if (! firm_opt.freestanding) {
1107                 /* check for a known runtime function */
1108                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1109                         if (id != rts_idents[i])
1110                                 continue;
1111
1112                         /* ignore those rts functions not necessary needed for current mode */
1113                         if ((c_mode & rts_data[i].flags) == 0)
1114                                 continue;
1115                         assert(rts_entities[rts_data[i].id] == NULL);
1116                         rts_entities[rts_data[i].id] = irentity;
1117                 }
1118         }
1119
1120         entitymap_insert(&entitymap, symbol, irentity);
1121
1122 entity_created:
1123         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1124         entity->function.entity  = irentity;
1125
1126         return irentity;
1127 }
1128
1129 /**
1130  * Creates a Const node representing a constant.
1131  */
1132 static ir_node *const_to_firm(const const_expression_t *cnst)
1133 {
1134         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1135         ir_mode  *mode = get_ir_mode(cnst->base.type);
1136
1137         char    buf[128];
1138         tarval *tv;
1139         size_t  len;
1140         if (mode_is_float(mode)) {
1141                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1142         } else {
1143                 if (mode_is_signed(mode)) {
1144                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1145                 } else {
1146                         len = snprintf(buf, sizeof(buf), "%llu",
1147                                        (unsigned long long) cnst->v.int_value);
1148                 }
1149                 tv = new_tarval_from_str(buf, len, mode);
1150         }
1151
1152         return new_d_Const(dbgi, tv);
1153 }
1154
1155 /**
1156  * Creates a Const node representing a character constant.
1157  */
1158 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1159 {
1160         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1161         ir_mode  *mode = get_ir_mode(cnst->base.type);
1162
1163         long long int v = 0;
1164         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1165                 if (char_is_signed) {
1166                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1167                 } else {
1168                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1169                 }
1170         }
1171         char    buf[128];
1172         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1173         tarval *tv = new_tarval_from_str(buf, len, mode);
1174
1175         return new_d_Const(dbgi, tv);
1176 }
1177
1178 /**
1179  * Creates a Const node representing a wide character constant.
1180  */
1181 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1182 {
1183         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1184         ir_mode  *mode = get_ir_mode(cnst->base.type);
1185
1186         long long int v = cnst->v.wide_character.begin[0];
1187
1188         char    buf[128];
1189         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1190         tarval *tv = new_tarval_from_str(buf, len, mode);
1191
1192         return new_d_Const(dbgi, tv);
1193 }
1194
1195 /**
1196  * Creates a SymConst for a given entity.
1197  *
1198  * @param dbgi    debug info
1199  * @param mode    the (reference) mode for the SymConst
1200  * @param entity  the entity
1201  */
1202 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1203                               ir_entity *entity)
1204 {
1205         assert(entity != NULL);
1206         union symconst_symbol sym;
1207         sym.entity_p = entity;
1208         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1209 }
1210
1211 /**
1212  * Creates a SymConst node representing a string constant.
1213  *
1214  * @param src_pos    the source position of the string constant
1215  * @param id_prefix  a prefix for the name of the generated string constant
1216  * @param value      the value of the string constant
1217  */
1218 static ir_node *string_to_firm(const source_position_t *const src_pos,
1219                                const char *const id_prefix,
1220                                const string_t *const value)
1221 {
1222         ir_type  *const global_type = get_glob_type();
1223         dbg_info *const dbgi        = get_dbg_info(src_pos);
1224         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1225                                                        ir_type_const_char, dbgi);
1226
1227         ident     *const id     = id_unique(id_prefix);
1228         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1229         set_entity_ld_ident(entity, id);
1230         set_entity_variability(entity, variability_constant);
1231         set_entity_allocation(entity, allocation_static);
1232
1233         ir_type *const elem_type = ir_type_const_char;
1234         ir_mode *const mode      = get_type_mode(elem_type);
1235
1236         const char* const string = value->begin;
1237         const size_t      slen   = value->size;
1238
1239         set_array_lower_bound_int(type, 0, 0);
1240         set_array_upper_bound_int(type, 0, slen);
1241         set_type_size_bytes(type, slen);
1242         set_type_state(type, layout_fixed);
1243
1244         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1245         for (size_t i = 0; i < slen; ++i) {
1246                 tvs[i] = new_tarval_from_long(string[i], mode);
1247         }
1248
1249         set_array_entity_values(entity, tvs, slen);
1250         free(tvs);
1251
1252         return create_symconst(dbgi, mode_P_data, entity);
1253 }
1254
1255 /**
1256  * Creates a SymConst node representing a string literal.
1257  *
1258  * @param literal   the string literal
1259  */
1260 static ir_node *string_literal_to_firm(
1261                 const string_literal_expression_t* literal)
1262 {
1263         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1264                               &literal->value);
1265 }
1266
1267 /**
1268  * Creates a SymConst node representing a wide string literal.
1269  *
1270  * @param literal   the wide string literal
1271  */
1272 static ir_node *wide_string_literal_to_firm(
1273         const wide_string_literal_expression_t* const literal)
1274 {
1275         ir_type *const global_type = get_glob_type();
1276         ir_type *const elem_type   = ir_type_wchar_t;
1277         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1278         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1279                                                     elem_type, dbgi);
1280
1281         ident     *const id     = id_unique("Lstr.%u");
1282         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1283         set_entity_ld_ident(entity, id);
1284         set_entity_variability(entity, variability_constant);
1285         set_entity_allocation(entity, allocation_static);
1286
1287         ir_mode *const mode      = get_type_mode(elem_type);
1288
1289         const wchar_rep_t *const string = literal->value.begin;
1290         const size_t             slen   = literal->value.size;
1291
1292         set_array_lower_bound_int(type, 0, 0);
1293         set_array_upper_bound_int(type, 0, slen);
1294         set_type_size_bytes(type, slen);
1295         set_type_state(type, layout_fixed);
1296
1297         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1298         for (size_t i = 0; i < slen; ++i) {
1299                 tvs[i] = new_tarval_from_long(string[i], mode);
1300         }
1301
1302         set_array_entity_values(entity, tvs, slen);
1303         free(tvs);
1304
1305         return create_symconst(dbgi, mode_P_data, entity);
1306 }
1307
1308 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1309                                       ir_node *const addr)
1310 {
1311         ir_type *irtype = get_ir_type(type);
1312         if (is_compound_type(irtype)
1313                         || is_Method_type(irtype)
1314                         || is_Array_type(irtype)) {
1315                 return addr;
1316         }
1317
1318         ir_mode *const mode     = get_type_mode(irtype);
1319         ir_node *const memory   = get_store();
1320         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1321         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1322         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1323
1324         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1325                 set_Load_volatility(load, volatility_is_volatile);
1326         }
1327
1328         set_store(load_mem);
1329         return load_res;
1330 }
1331
1332 /**
1333  * Creates a strict Conv if neccessary.
1334  */
1335 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1336 {
1337         ir_mode *mode = get_irn_mode(node);
1338
1339         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1340                 return node;
1341         if (!mode_is_float(mode))
1342                 return node;
1343
1344         /* check if there is already a Conv */
1345         if (is_Conv(node)) {
1346                 /* convert it into a strict Conv */
1347                 set_Conv_strict(node, 1);
1348                 return node;
1349         }
1350
1351         /* otherwise create a new one */
1352         return new_d_strictConv(dbgi, node, mode);
1353 }
1354
1355 static ir_node *get_global_var_address(dbg_info *const dbgi,
1356                                        const entity_t *const entity)
1357 {
1358         assert(entity->kind == ENTITY_VARIABLE);
1359         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1360
1361         ir_entity *const irentity = entity->variable.v.entity;
1362         if (entity->variable.thread_local) {
1363                 ir_node *const no_mem = new_NoMem();
1364                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1365                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1366         } else {
1367                 return create_symconst(dbgi, mode_P_data, irentity);
1368         }
1369 }
1370
1371 /**
1372  * Returns the correct base address depending on whether it is a parameter or a
1373  * normal local variable.
1374  */
1375 static ir_node *get_local_frame(ir_entity *const ent)
1376 {
1377         ir_graph      *const irg   = current_ir_graph;
1378         const ir_type *const owner = get_entity_owner(ent);
1379         if (owner == get_irg_frame_type(irg)) {
1380                 return get_irg_frame(irg);
1381         } else {
1382                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1383                 return get_irg_value_param_base(irg);
1384         }
1385 }
1386
1387 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1388 {
1389         ir_mode *value_mode = get_irn_mode(value);
1390
1391         if (value_mode == dest_mode || is_Bad(value))
1392                 return value;
1393
1394         if (dest_mode == mode_b) {
1395                 ir_node *zero = new_Const(get_mode_null(value_mode));
1396                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1397                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1398                 return proj;
1399         }
1400
1401         return new_d_Conv(dbgi, value, dest_mode);
1402 }
1403
1404 /**
1405  * Keep all memory edges of the given block.
1406  */
1407 static void keep_all_memory(ir_node *block) {
1408         ir_node *old = get_cur_block();
1409
1410         set_cur_block(block);
1411         keep_alive(get_store());
1412         /* TODO: keep all memory edges from restricted pointers */
1413         set_cur_block(old);
1414 }
1415
1416 static ir_node *reference_expression_enum_value_to_firm(
1417                 const reference_expression_t *ref)
1418 {
1419         entity_t *entity = ref->entity;
1420         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1421         /* make sure the type is constructed */
1422         (void) get_ir_type(type);
1423
1424         return new_Const(entity->enum_value.tv);
1425 }
1426
1427 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1428 {
1429         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1430         entity_t *entity = ref->entity;
1431         assert(is_declaration(entity));
1432         type_t   *type   = skip_typeref(entity->declaration.type);
1433
1434         /* make sure the type is constructed */
1435         (void) get_ir_type(type);
1436
1437         switch ((declaration_kind_t) entity->declaration.kind) {
1438         case DECLARATION_KIND_UNKNOWN:
1439                 break;
1440
1441         case DECLARATION_KIND_LOCAL_VARIABLE: {
1442                 ir_mode *const mode = get_ir_mode(type);
1443                 return get_value(entity->variable.v.value_number, mode);
1444         }
1445         case DECLARATION_KIND_PARAMETER: {
1446                 ir_mode *const mode = get_ir_mode(type);
1447                 return get_value(entity->parameter.v.value_number, mode);
1448         }
1449         case DECLARATION_KIND_FUNCTION: {
1450                 ir_mode *const mode = get_ir_mode(type);
1451                 return create_symconst(dbgi, mode, entity->function.entity);
1452         }
1453         case DECLARATION_KIND_INNER_FUNCTION: {
1454                 ir_mode *const mode = get_ir_mode(type);
1455                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1456                         /* inner function not using the closure */
1457                         return create_symconst(dbgi, mode, entity->function.entity);
1458                 } else {
1459                         /* TODO: need trampoline here */
1460                         panic("Trampoline code not implemented");
1461                         return create_symconst(dbgi, mode, entity->function.entity);
1462                 }
1463         }
1464         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1465                 ir_node *const addr = get_global_var_address(dbgi, entity);
1466                 return deref_address(dbgi, entity->declaration.type, addr);
1467         }
1468
1469         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1470                 ir_entity *irentity = entity->variable.v.entity;
1471                 ir_node   *frame    = get_local_frame(irentity);
1472                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1473                 return deref_address(dbgi, entity->declaration.type, sel);
1474         }
1475         case DECLARATION_KIND_PARAMETER_ENTITY: {
1476                 ir_entity *irentity = entity->parameter.v.entity;
1477                 ir_node   *frame    = get_local_frame(irentity);
1478                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1479                 return deref_address(dbgi, entity->declaration.type, sel);
1480         }
1481
1482         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1483                 return entity->variable.v.vla_base;
1484
1485         case DECLARATION_KIND_COMPOUND_MEMBER:
1486                 panic("not implemented reference type");
1487         }
1488
1489         panic("reference to declaration with unknown type found");
1490 }
1491
1492 static ir_node *reference_addr(const reference_expression_t *ref)
1493 {
1494         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1495         entity_t *entity = ref->entity;
1496         assert(is_declaration(entity));
1497
1498         switch((declaration_kind_t) entity->declaration.kind) {
1499         case DECLARATION_KIND_UNKNOWN:
1500                 break;
1501         case DECLARATION_KIND_PARAMETER:
1502         case DECLARATION_KIND_LOCAL_VARIABLE:
1503                 /* you can store to a local variable (so we don't panic but return NULL
1504                  * as an indicator for no real address) */
1505                 return NULL;
1506         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1507                 ir_node *const addr = get_global_var_address(dbgi, entity);
1508                 return addr;
1509         }
1510         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1511                 ir_entity *irentity = entity->variable.v.entity;
1512                 ir_node   *frame    = get_local_frame(irentity);
1513                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1514
1515                 return sel;
1516         }
1517         case DECLARATION_KIND_PARAMETER_ENTITY: {
1518                 ir_entity *irentity = entity->parameter.v.entity;
1519                 ir_node   *frame    = get_local_frame(irentity);
1520                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1521
1522                 return sel;
1523         }
1524
1525         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1526                 return entity->variable.v.vla_base;
1527
1528         case DECLARATION_KIND_FUNCTION: {
1529                 type_t  *const type = skip_typeref(entity->declaration.type);
1530                 ir_mode *const mode = get_ir_mode(type);
1531                 return create_symconst(dbgi, mode, entity->function.entity);
1532         }
1533
1534         case DECLARATION_KIND_INNER_FUNCTION:
1535         case DECLARATION_KIND_COMPOUND_MEMBER:
1536                 panic("not implemented reference type");
1537         }
1538
1539         panic("reference to declaration with unknown type found");
1540 }
1541
1542 /**
1543  * Transform calls to builtin functions.
1544  */
1545 static ir_node *process_builtin_call(const call_expression_t *call)
1546 {
1547         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1548
1549         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1550         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1551
1552         type_t *type = skip_typeref(builtin->base.type);
1553         assert(is_type_pointer(type));
1554
1555         type_t   *function_type = skip_typeref(type->pointer.points_to);
1556         symbol_t *symbol        = builtin->symbol;
1557
1558         switch(symbol->ID) {
1559         case T___builtin_alloca: {
1560                 if (call->arguments == NULL || call->arguments->next != NULL) {
1561                         panic("invalid number of parameters on __builtin_alloca");
1562                 }
1563                 expression_t *argument = call->arguments->expression;
1564                 ir_node      *size     = expression_to_firm(argument);
1565
1566                 ir_node *store  = get_store();
1567                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1568                                               stack_alloc);
1569                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1570                 set_store(proj_m);
1571                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1572
1573                 return res;
1574         }
1575
1576         case T___builtin_huge_val:
1577         case T___builtin_inf:
1578         case T___builtin_inff:
1579         case T___builtin_infl: {
1580                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1581                 tarval  *tv   = get_mode_infinite(mode);
1582                 ir_node *res  = new_d_Const(dbgi, tv);
1583                 return   res;
1584         }
1585         case T___builtin_nan:
1586         case T___builtin_nanf:
1587         case T___builtin_nanl: {
1588                 /* Ignore string for now... */
1589                 assert(is_type_function(function_type));
1590                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1591                 tarval  *tv   = get_mode_NAN(mode);
1592                 ir_node *res  = new_d_Const(dbgi, tv);
1593                 return res;
1594         }
1595         case T___builtin_expect: {
1596                 expression_t *argument = call->arguments->expression;
1597                 return _expression_to_firm(argument);
1598         }
1599         case T___builtin_va_end:
1600                 return NULL;
1601         default:
1602                 panic("Unsupported builtin found\n");
1603         }
1604 }
1605
1606 /**
1607  * Transform a call expression.
1608  * Handles some special cases, like alloca() calls, which must be resolved
1609  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1610  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1611  * handled right...
1612  */
1613 static ir_node *call_expression_to_firm(const call_expression_t *call)
1614 {
1615         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1616         assert(get_cur_block() != NULL);
1617
1618         expression_t *function = call->function;
1619         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1620                 return process_builtin_call(call);
1621         }
1622         if (function->kind == EXPR_REFERENCE) {
1623                 const reference_expression_t *ref    = &function->reference;
1624                 entity_t                     *entity = ref->entity;
1625
1626                 if (entity->kind == ENTITY_FUNCTION
1627                                 && entity->function.entity == rts_entities[rts_alloca]) {
1628                         /* handle alloca() call */
1629                         expression_t *argument = call->arguments->expression;
1630                         ir_node      *size     = expression_to_firm(argument);
1631
1632                         size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1633
1634                         ir_node  *store  = get_store();
1635                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1636                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1637                                                        stack_alloc);
1638                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1639                         set_store(proj_m);
1640                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1641
1642                         return res;
1643                 }
1644         }
1645         ir_node *callee = expression_to_firm(function);
1646
1647         type_t *type = skip_typeref(function->base.type);
1648         assert(is_type_pointer(type));
1649         pointer_type_t *pointer_type = &type->pointer;
1650         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1651         assert(is_type_function(points_to));
1652         function_type_t *function_type = &points_to->function;
1653
1654         int      n_parameters = 0;
1655         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1656         ir_type *new_method_type = NULL;
1657         if (function_type->variadic || function_type->unspecified_parameters) {
1658                 const call_argument_t *argument = call->arguments;
1659                 for ( ; argument != NULL; argument = argument->next) {
1660                         ++n_parameters;
1661                 }
1662
1663                 /* we need to construct a new method type matching the call
1664                  * arguments... */
1665                 int n_res       = get_method_n_ress(ir_method_type);
1666                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1667                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1668                                                     n_parameters, n_res, dbgi);
1669                 set_method_calling_convention(new_method_type,
1670                                get_method_calling_convention(ir_method_type));
1671                 set_method_additional_properties(new_method_type,
1672                                get_method_additional_properties(ir_method_type));
1673                 set_method_variadicity(new_method_type,
1674                                        get_method_variadicity(ir_method_type));
1675
1676                 for (int i = 0; i < n_res; ++i) {
1677                         set_method_res_type(new_method_type, i,
1678                                             get_method_res_type(ir_method_type, i));
1679                 }
1680                 argument = call->arguments;
1681                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1682                         expression_t *expression = argument->expression;
1683                         ir_type      *irtype     = get_ir_type(expression->base.type);
1684                         set_method_param_type(new_method_type, i, irtype);
1685                 }
1686                 ir_method_type = new_method_type;
1687         } else {
1688                 n_parameters = get_method_n_params(ir_method_type);
1689         }
1690
1691         ir_node *in[n_parameters];
1692
1693         const call_argument_t *argument = call->arguments;
1694         for (int n = 0; n < n_parameters; ++n) {
1695                 expression_t *expression = argument->expression;
1696                 ir_node      *arg_node   = expression_to_firm(expression);
1697
1698                 arg_node = do_strict_conv(dbgi, arg_node);
1699
1700                 in[n] = arg_node;
1701
1702                 argument = argument->next;
1703         }
1704
1705         ir_node  *store = get_store();
1706         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1707                                      ir_method_type);
1708         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1709         set_store(mem);
1710
1711         type_t  *return_type = skip_typeref(function_type->return_type);
1712         ir_node *result      = NULL;
1713
1714         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1715                 ir_mode *mode;
1716                 if (is_type_scalar(return_type)) {
1717                         mode = get_ir_mode(return_type);
1718                 } else {
1719                         mode = mode_P_data;
1720                 }
1721                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1722                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1723         }
1724
1725         if (function->kind == EXPR_REFERENCE &&
1726             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1727                 /* A dead end:  Keep the Call and the Block.  Also place all further
1728                  * nodes into a new and unreachable block. */
1729                 keep_alive(node);
1730                 keep_alive(get_cur_block());
1731                 new_Block(0, NULL);
1732         }
1733
1734         return result;
1735 }
1736
1737 static void statement_to_firm(statement_t *statement);
1738 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1739
1740 static ir_node *expression_to_addr(const expression_t *expression);
1741 static ir_node *create_condition_evaluation(const expression_t *expression,
1742                                             ir_node *true_block,
1743                                             ir_node *false_block);
1744
1745 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1746                          ir_node *value)
1747 {
1748         value = do_strict_conv(dbgi, value);
1749
1750         ir_node *memory = get_store();
1751
1752         if (is_type_scalar(type)) {
1753                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1754                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1755                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1756                         set_Store_volatility(store, volatility_is_volatile);
1757                 set_store(store_mem);
1758         } else {
1759                 ir_type *irtype    = get_ir_type(type);
1760                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1761                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1762                 set_store(copyb_mem);
1763         }
1764 }
1765
1766 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1767 {
1768         tarval *all_one   = get_mode_all_one(mode);
1769         int     mode_size = get_mode_size_bits(mode);
1770
1771         assert(offset >= 0);
1772         assert(size   >= 0);
1773         assert(offset + size <= mode_size);
1774         if (size == mode_size) {
1775                 return all_one;
1776         }
1777
1778         long    shiftr    = get_mode_size_bits(mode) - size;
1779         long    shiftl    = offset;
1780         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1781         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1782         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1783         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1784
1785         return mask1;
1786 }
1787
1788 static void bitfield_store_to_firm(dbg_info *dbgi,
1789                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1790 {
1791         ir_type *entity_type = get_entity_type(entity);
1792         ir_type *base_type   = get_primitive_base_type(entity_type);
1793         assert(base_type != NULL);
1794         ir_mode *mode        = get_type_mode(base_type);
1795
1796         value = create_conv(dbgi, value, mode);
1797
1798         /* kill upper bits of value and shift to right position */
1799         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1800         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1801
1802         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1803         ir_node *mask_node       = new_d_Const(dbgi, mask);
1804         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1805         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1806         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
1807         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1808
1809         /* load current value */
1810         ir_node  *mem             = get_store();
1811         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1812         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1813         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1814         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1815         tarval   *inv_mask        = tarval_not(shift_mask);
1816         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1817         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1818
1819         /* construct new value and store */
1820         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1821         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1822         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1823         set_store(store_mem);
1824
1825         if (set_volatile) {
1826                 set_Load_volatility(load, volatility_is_volatile);
1827                 set_Store_volatility(store, volatility_is_volatile);
1828         }
1829 }
1830
1831 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1832                 ir_node *addr)
1833 {
1834         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1835         type_t   *type     = expression->base.type;
1836         ir_mode  *mode     = get_ir_mode(type);
1837         ir_node  *mem      = get_store();
1838         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1839         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1840         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1841
1842         load_res           = create_conv(dbgi, load_res, mode_int);
1843
1844         set_store(load_mem);
1845
1846         /* kill upper bits */
1847         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1848         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1849         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1850         ir_type   *entity_type  = get_entity_type(entity);
1851         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1852         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1853         assert(shift_bitsl >= 0);
1854         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1855         ir_node   *countl       = new_d_Const(dbgi, tvl);
1856         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1857
1858         long       shift_bitsr  = bitoffset + shift_bitsl;
1859         assert(shift_bitsr <= (long) machine_size);
1860         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1861         ir_node   *countr       = new_d_Const(dbgi, tvr);
1862         ir_node   *shiftr;
1863         if (mode_is_signed(mode)) {
1864                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1865         } else {
1866                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1867         }
1868
1869         return create_conv(dbgi, shiftr, mode);
1870 }
1871
1872 /* make sure the selected compound type is constructed */
1873 static void construct_select_compound(const select_expression_t *expression)
1874 {
1875         type_t *type = skip_typeref(expression->compound->base.type);
1876         if (is_type_pointer(type)) {
1877                 type = type->pointer.points_to;
1878         }
1879         (void) get_ir_type(type);
1880 }
1881
1882 static void set_value_for_expression_addr(const expression_t *expression,
1883                                           ir_node *value, ir_node *addr)
1884 {
1885         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1886         value          = do_strict_conv(dbgi, value);
1887
1888         if (expression->kind == EXPR_REFERENCE) {
1889                 const reference_expression_t *ref = &expression->reference;
1890
1891                 entity_t *entity = ref->entity;
1892                 assert(is_declaration(entity));
1893                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1894                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1895                         set_value(entity->variable.v.value_number, value);
1896                         return;
1897                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1898                         set_value(entity->parameter.v.value_number, value);
1899                         return;
1900                 }
1901         }
1902
1903         if (addr == NULL)
1904                 addr = expression_to_addr(expression);
1905         assert(addr != NULL);
1906
1907         type_t *type = skip_typeref(expression->base.type);
1908
1909         if (expression->kind == EXPR_SELECT) {
1910                 const select_expression_t *select = &expression->select;
1911
1912                 construct_select_compound(select);
1913
1914                 entity_t *entity = select->compound_entry;
1915                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1916                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1917                         ir_entity *irentity = entity->compound_member.entity;
1918                         bool       set_volatile
1919                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1920                         bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1921                         return;
1922                 }
1923         }
1924
1925         assign_value(dbgi, addr, type, value);
1926 }
1927
1928 static void set_value_for_expression(const expression_t *expression,
1929                                      ir_node *value)
1930 {
1931         set_value_for_expression_addr(expression, value, NULL);
1932 }
1933
1934 static ir_node *get_value_from_lvalue(const expression_t *expression,
1935                                       ir_node *addr)
1936 {
1937         if (expression->kind == EXPR_REFERENCE) {
1938                 const reference_expression_t *ref = &expression->reference;
1939
1940                 entity_t *entity = ref->entity;
1941                 assert(entity->kind == ENTITY_VARIABLE
1942                                 || entity->kind == ENTITY_PARAMETER);
1943                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1944                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1945                         assert(addr == NULL);
1946                         ir_mode *mode = get_ir_mode(expression->base.type);
1947                         return get_value(entity->variable.v.value_number, mode);
1948                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1949                         assert(addr == NULL);
1950                         ir_mode *mode = get_ir_mode(expression->base.type);
1951                         return get_value(entity->parameter.v.value_number, mode);
1952                 }
1953         }
1954
1955         assert(addr != NULL);
1956         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1957
1958         ir_node *value;
1959         if (expression->kind == EXPR_SELECT &&
1960             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1961             construct_select_compound(&expression->select);
1962                 value = bitfield_extract_to_firm(&expression->select, addr);
1963         } else {
1964                 value = deref_address(dbgi, expression->base.type, addr);
1965         }
1966
1967         return value;
1968 }
1969
1970
1971 static ir_node *create_incdec(const unary_expression_t *expression)
1972 {
1973         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1974         const expression_t *value_expr = expression->value;
1975         ir_node            *addr       = expression_to_addr(value_expr);
1976         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1977
1978         type_t  *type = skip_typeref(expression->base.type);
1979         ir_mode *mode = get_ir_mode(expression->base.type);
1980
1981         ir_node *offset;
1982         if (is_type_pointer(type)) {
1983                 pointer_type_t *pointer_type = &type->pointer;
1984                 offset                       = get_type_size(pointer_type->points_to);
1985         } else {
1986                 assert(is_type_arithmetic(type));
1987                 offset = new_Const(get_mode_one(mode));
1988         }
1989
1990         ir_node *result;
1991         ir_node *store_value;
1992         switch(expression->base.kind) {
1993         case EXPR_UNARY_POSTFIX_INCREMENT:
1994                 result      = value;
1995                 store_value = new_d_Add(dbgi, value, offset, mode);
1996                 break;
1997         case EXPR_UNARY_POSTFIX_DECREMENT:
1998                 result      = value;
1999                 store_value = new_d_Sub(dbgi, value, offset, mode);
2000                 break;
2001         case EXPR_UNARY_PREFIX_INCREMENT:
2002                 result      = new_d_Add(dbgi, value, offset, mode);
2003                 store_value = result;
2004                 break;
2005         case EXPR_UNARY_PREFIX_DECREMENT:
2006                 result      = new_d_Sub(dbgi, value, offset, mode);
2007                 store_value = result;
2008                 break;
2009         default:
2010                 panic("no incdec expr in create_incdec");
2011         }
2012
2013         set_value_for_expression_addr(value_expr, store_value, addr);
2014
2015         return result;
2016 }
2017
2018 static bool is_local_variable(expression_t *expression)
2019 {
2020         if (expression->kind != EXPR_REFERENCE)
2021                 return false;
2022         reference_expression_t *ref_expr = &expression->reference;
2023         entity_t               *entity   = ref_expr->entity;
2024         if (entity->kind != ENTITY_VARIABLE)
2025                 return false;
2026         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2027         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2028 }
2029
2030 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2031 {
2032         switch(kind) {
2033         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2034         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2035         case EXPR_BINARY_NOTEQUAL:
2036                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2037         case EXPR_BINARY_ISLESS:
2038         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2039         case EXPR_BINARY_ISLESSEQUAL:
2040         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2041         case EXPR_BINARY_ISGREATER:
2042         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2043         case EXPR_BINARY_ISGREATEREQUAL:
2044         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2045         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2046
2047         default:
2048                 break;
2049         }
2050         panic("trying to get pn_Cmp from non-comparison binexpr type");
2051 }
2052
2053 /**
2054  * Handle the assume optimizer hint: check if a Confirm
2055  * node can be created.
2056  *
2057  * @param dbi    debug info
2058  * @param expr   the IL assume expression
2059  *
2060  * we support here only some simple cases:
2061  *  - var rel const
2062  *  - const rel val
2063  *  - var rel var
2064  */
2065 static ir_node *handle_assume_compare(dbg_info *dbi,
2066                                       const binary_expression_t *expression)
2067 {
2068         expression_t *op1 = expression->left;
2069         expression_t *op2 = expression->right;
2070         entity_t     *var2, *var = NULL;
2071         ir_node      *res = NULL;
2072         pn_Cmp        cmp_val;
2073
2074         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2075
2076         if (is_local_variable(op1) && is_local_variable(op2)) {
2077         var  = op1->reference.entity;
2078             var2 = op2->reference.entity;
2079
2080                 type_t  *const type = skip_typeref(var->declaration.type);
2081                 ir_mode *const mode = get_ir_mode(type);
2082
2083                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2084                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2085
2086                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2087                 set_value(var2->variable.v.value_number, res);
2088
2089                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2090                 set_value(var->variable.v.value_number, res);
2091
2092                 return res;
2093         }
2094
2095         expression_t *con;
2096         if (is_local_variable(op1) && is_constant_expression(op2)) {
2097                 var = op1->reference.entity;
2098                 con = op2;
2099         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2100                 cmp_val = get_inversed_pnc(cmp_val);
2101                 var = op2->reference.entity;
2102                 con = op1;
2103         }
2104
2105         if (var != NULL) {
2106                 type_t  *const type = skip_typeref(var->declaration.type);
2107                 ir_mode *const mode = get_ir_mode(type);
2108
2109                 res = get_value(var->variable.v.value_number, mode);
2110                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2111                 set_value(var->variable.v.value_number, res);
2112         }
2113         return res;
2114 }
2115
2116 /**
2117  * Handle the assume optimizer hint.
2118  *
2119  * @param dbi    debug info
2120  * @param expr   the IL assume expression
2121  */
2122 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2123         switch(expression->kind) {
2124         case EXPR_BINARY_EQUAL:
2125         case EXPR_BINARY_NOTEQUAL:
2126         case EXPR_BINARY_LESS:
2127         case EXPR_BINARY_LESSEQUAL:
2128         case EXPR_BINARY_GREATER:
2129         case EXPR_BINARY_GREATEREQUAL:
2130                 return handle_assume_compare(dbi, &expression->binary);
2131         default:
2132                 return NULL;
2133         }
2134 }
2135
2136 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2137 {
2138         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2139         type_t   *type = skip_typeref(expression->base.type);
2140
2141         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2142                 return expression_to_addr(expression->value);
2143
2144         const expression_t *value = expression->value;
2145
2146         switch(expression->base.kind) {
2147         case EXPR_UNARY_NEGATE: {
2148                 ir_node *value_node = expression_to_firm(value);
2149                 ir_mode *mode = get_ir_mode(type);
2150                 return new_d_Minus(dbgi, value_node, mode);
2151         }
2152         case EXPR_UNARY_PLUS:
2153                 return expression_to_firm(value);
2154         case EXPR_UNARY_BITWISE_NEGATE: {
2155                 ir_node *value_node = expression_to_firm(value);
2156                 ir_mode *mode = get_ir_mode(type);
2157                 return new_d_Not(dbgi, value_node, mode);
2158         }
2159         case EXPR_UNARY_NOT: {
2160                 ir_node *value_node = _expression_to_firm(value);
2161                 value_node          = create_conv(dbgi, value_node, mode_b);
2162                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2163                 return res;
2164         }
2165         case EXPR_UNARY_DEREFERENCE: {
2166                 ir_node *value_node = expression_to_firm(value);
2167                 type_t  *value_type = skip_typeref(value->base.type);
2168                 assert(is_type_pointer(value_type));
2169                 type_t  *points_to  = value_type->pointer.points_to;
2170                 return deref_address(dbgi, points_to, value_node);
2171         }
2172         case EXPR_UNARY_POSTFIX_INCREMENT:
2173         case EXPR_UNARY_POSTFIX_DECREMENT:
2174         case EXPR_UNARY_PREFIX_INCREMENT:
2175         case EXPR_UNARY_PREFIX_DECREMENT:
2176                 return create_incdec(expression);
2177         case EXPR_UNARY_CAST: {
2178                 ir_node *value_node = expression_to_firm(value);
2179                 if (is_type_scalar(type)) {
2180                         ir_mode *mode = get_ir_mode(type);
2181                         ir_node *node = create_conv(dbgi, value_node, mode);
2182                         node = do_strict_conv(dbgi, node);
2183                         return node;
2184                 } else {
2185                         /* make sure firm type is constructed */
2186                         (void) get_ir_type(type);
2187                         return value_node;
2188                 }
2189         }
2190         case EXPR_UNARY_CAST_IMPLICIT: {
2191                 ir_node *value_node = expression_to_firm(value);
2192                 if (is_type_scalar(type)) {
2193                         ir_mode *mode = get_ir_mode(type);
2194                         return create_conv(dbgi, value_node, mode);
2195                 } else {
2196                         return value_node;
2197                 }
2198         }
2199         case EXPR_UNARY_ASSUME:
2200                 if (firm_opt.confirm)
2201                         return handle_assume(dbgi, value);
2202                 else
2203                         return NULL;
2204
2205         default:
2206                 break;
2207         }
2208         panic("invalid UNEXPR type found");
2209 }
2210
2211 /**
2212  * produces a 0/1 depending of the value of a mode_b node
2213  */
2214 static ir_node *produce_condition_result(const expression_t *expression,
2215                                          dbg_info *dbgi)
2216 {
2217         ir_mode *mode      = get_ir_mode(expression->base.type);
2218         ir_node *cur_block = get_cur_block();
2219
2220         ir_node *one_block = new_immBlock();
2221         ir_node *one       = new_Const(get_mode_one(mode));
2222         ir_node *jmp_one   = new_d_Jmp(dbgi);
2223
2224         ir_node *zero_block = new_immBlock();
2225         ir_node *zero       = new_Const(get_mode_null(mode));
2226         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2227
2228         set_cur_block(cur_block);
2229         create_condition_evaluation(expression, one_block, zero_block);
2230         mature_immBlock(one_block);
2231         mature_immBlock(zero_block);
2232
2233         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2234         new_Block(2, in_cf);
2235
2236         ir_node *in[2] = { one, zero };
2237         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2238
2239         return val;
2240 }
2241
2242 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2243                 ir_node *value, type_t *type)
2244 {
2245         pointer_type_t *const pointer_type = &type->pointer;
2246         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2247         unsigned              elem_size    = get_type_size_const(points_to);
2248
2249         /* gcc extension: allow arithmetic with void * and function * */
2250         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2251             is_type_function(points_to))  {
2252                 elem_size = 1;
2253         }
2254
2255         assert(elem_size >= 1);
2256         if (elem_size == 1)
2257                 return value;
2258
2259         value = create_conv(dbgi, value, mode_int);
2260         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2261         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2262         return mul;
2263 }
2264
2265 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2266                           ir_node *left, ir_node *right)
2267 {
2268         ir_mode  *mode;
2269         type_t   *type_left  = skip_typeref(expression->left->base.type);
2270         type_t   *type_right = skip_typeref(expression->right->base.type);
2271
2272         expression_kind_t kind = expression->base.kind;
2273
2274         switch (kind) {
2275         case EXPR_BINARY_SHIFTLEFT:
2276         case EXPR_BINARY_SHIFTRIGHT:
2277         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2278         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2279                 mode  = get_irn_mode(left);
2280                 right = create_conv(dbgi, right, mode_uint);
2281                 break;
2282
2283         case EXPR_BINARY_SUB:
2284                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2285                         const pointer_type_t *const ptr_type = &type_left->pointer;
2286
2287                         mode = get_ir_mode(expression->base.type);
2288                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2289                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2290                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2291                         ir_node *const no_mem    = new_NoMem();
2292                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2293                                                                                                    mode, op_pin_state_floats);
2294                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2295                 }
2296                 /* fallthrough */
2297         case EXPR_BINARY_SUB_ASSIGN:
2298                 if (is_type_pointer(type_left)) {
2299                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2300                         mode  = get_ir_mode(type_left);
2301                         break;
2302                 }
2303                 goto normal_node;
2304
2305         case EXPR_BINARY_ADD:
2306         case EXPR_BINARY_ADD_ASSIGN:
2307                 if (is_type_pointer(type_left)) {
2308                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2309                         mode  = get_ir_mode(type_left);
2310                         break;
2311                 } else if (is_type_pointer(type_right)) {
2312                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2313                         mode  = get_ir_mode(type_right);
2314                         break;
2315                 }
2316                 goto normal_node;
2317
2318         default:
2319 normal_node:
2320                 mode = get_irn_mode(right);
2321                 left = create_conv(dbgi, left, mode);
2322                 break;
2323         }
2324
2325         switch (kind) {
2326         case EXPR_BINARY_ADD_ASSIGN:
2327         case EXPR_BINARY_ADD:
2328                 return new_d_Add(dbgi, left, right, mode);
2329         case EXPR_BINARY_SUB_ASSIGN:
2330         case EXPR_BINARY_SUB:
2331                 return new_d_Sub(dbgi, left, right, mode);
2332         case EXPR_BINARY_MUL_ASSIGN:
2333         case EXPR_BINARY_MUL:
2334                 return new_d_Mul(dbgi, left, right, mode);
2335         case EXPR_BINARY_BITWISE_AND:
2336         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2337                 return new_d_And(dbgi, left, right, mode);
2338         case EXPR_BINARY_BITWISE_OR:
2339         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2340                 return new_d_Or(dbgi, left, right, mode);
2341         case EXPR_BINARY_BITWISE_XOR:
2342         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2343                 return new_d_Eor(dbgi, left, right, mode);
2344         case EXPR_BINARY_SHIFTLEFT:
2345         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2346                 return new_d_Shl(dbgi, left, right, mode);
2347         case EXPR_BINARY_SHIFTRIGHT:
2348         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2349                 if (mode_is_signed(mode)) {
2350                         return new_d_Shrs(dbgi, left, right, mode);
2351                 } else {
2352                         return new_d_Shr(dbgi, left, right, mode);
2353                 }
2354         case EXPR_BINARY_DIV:
2355         case EXPR_BINARY_DIV_ASSIGN: {
2356                 ir_node *pin = new_Pin(new_NoMem());
2357                 ir_node *op;
2358                 ir_node *res;
2359                 if (mode_is_float(mode)) {
2360                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2361                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2362                 } else {
2363                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2364                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2365                 }
2366                 return res;
2367         }
2368         case EXPR_BINARY_MOD:
2369         case EXPR_BINARY_MOD_ASSIGN: {
2370                 ir_node *pin = new_Pin(new_NoMem());
2371                 assert(!mode_is_float(mode));
2372                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2373                                          op_pin_state_floats);
2374                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2375                 return res;
2376         }
2377         default:
2378                 panic("unexpected expression kind");
2379         }
2380 }
2381
2382 static ir_node *create_lazy_op(const binary_expression_t *expression)
2383 {
2384         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2385         type_t   *type = expression->base.type;
2386         ir_mode  *mode = get_ir_mode(type);
2387
2388         if (is_constant_expression(expression->left)) {
2389                 long val = fold_constant(expression->left);
2390                 expression_kind_t ekind = expression->base.kind;
2391                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2392                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2393                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2394                         return expression_to_firm(expression->right);
2395                 } else {
2396                         return new_Const(get_mode_one(mode));
2397                 }
2398         }
2399
2400         return produce_condition_result((const expression_t*) expression, dbgi);
2401 }
2402
2403 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2404                                             ir_node *right, ir_mode *mode);
2405
2406 static ir_node *create_assign_binop(const binary_expression_t *expression)
2407 {
2408         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2409         const expression_t *left_expr = expression->left;
2410         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2411         ir_node            *right     = expression_to_firm(expression->right);
2412         ir_node            *left_addr = expression_to_addr(left_expr);
2413         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2414         ir_node            *result    = create_op(dbgi, expression, left, right);
2415
2416         result = create_conv(dbgi, result, left_mode);
2417         result = do_strict_conv(dbgi, result);
2418
2419         set_value_for_expression_addr(left_expr, result, left_addr);
2420
2421         return result;
2422 }
2423
2424 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2425 {
2426         expression_kind_t kind = expression->base.kind;
2427
2428         switch(kind) {
2429         case EXPR_BINARY_EQUAL:
2430         case EXPR_BINARY_NOTEQUAL:
2431         case EXPR_BINARY_LESS:
2432         case EXPR_BINARY_LESSEQUAL:
2433         case EXPR_BINARY_GREATER:
2434         case EXPR_BINARY_GREATEREQUAL:
2435         case EXPR_BINARY_ISGREATER:
2436         case EXPR_BINARY_ISGREATEREQUAL:
2437         case EXPR_BINARY_ISLESS:
2438         case EXPR_BINARY_ISLESSEQUAL:
2439         case EXPR_BINARY_ISLESSGREATER:
2440         case EXPR_BINARY_ISUNORDERED: {
2441                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2442                 ir_node *left  = expression_to_firm(expression->left);
2443                 ir_node *right = expression_to_firm(expression->right);
2444                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2445                 long     pnc   = get_pnc(kind, expression->left->base.type);
2446                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2447                 return proj;
2448         }
2449         case EXPR_BINARY_ASSIGN: {
2450                 ir_node *addr  = expression_to_addr(expression->left);
2451                 ir_node *right = expression_to_firm(expression->right);
2452                 set_value_for_expression_addr(expression->left, right, addr);
2453
2454                 return right;
2455         }
2456         case EXPR_BINARY_ADD:
2457         case EXPR_BINARY_SUB:
2458         case EXPR_BINARY_MUL:
2459         case EXPR_BINARY_DIV:
2460         case EXPR_BINARY_MOD:
2461         case EXPR_BINARY_BITWISE_AND:
2462         case EXPR_BINARY_BITWISE_OR:
2463         case EXPR_BINARY_BITWISE_XOR:
2464         case EXPR_BINARY_SHIFTLEFT:
2465         case EXPR_BINARY_SHIFTRIGHT:
2466         {
2467                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2468                 ir_node  *left  = expression_to_firm(expression->left);
2469                 ir_node  *right = expression_to_firm(expression->right);
2470                 return create_op(dbgi, expression, left, right);
2471         }
2472         case EXPR_BINARY_LOGICAL_AND:
2473         case EXPR_BINARY_LOGICAL_OR:
2474                 return create_lazy_op(expression);
2475         case EXPR_BINARY_COMMA:
2476                 /* create side effects of left side */
2477                 (void) expression_to_firm(expression->left);
2478                 return _expression_to_firm(expression->right);
2479
2480         case EXPR_BINARY_ADD_ASSIGN:
2481         case EXPR_BINARY_SUB_ASSIGN:
2482         case EXPR_BINARY_MUL_ASSIGN:
2483         case EXPR_BINARY_MOD_ASSIGN:
2484         case EXPR_BINARY_DIV_ASSIGN:
2485         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2486         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2487         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2488         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2489         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2490                 return create_assign_binop(expression);
2491         default:
2492                 panic("TODO binexpr type");
2493         }
2494 }
2495
2496 static ir_node *array_access_addr(const array_access_expression_t *expression)
2497 {
2498         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2499         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2500         ir_node  *offset    = expression_to_firm(expression->index);
2501
2502         type_t  *offset_type = skip_typeref(expression->index->base.type);
2503         ir_mode *mode;
2504         if (is_type_signed(offset_type)) {
2505                 mode = get_ir_mode(type_ssize_t);
2506         } else {
2507                 mode = get_ir_mode(type_size_t);
2508         }
2509         offset = create_conv(dbgi, offset, mode);
2510
2511         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2512         assert(is_type_pointer(ref_type));
2513         pointer_type_t *pointer_type = &ref_type->pointer;
2514
2515         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2516         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2517         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2518                                              mode);
2519         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2520
2521         return result;
2522 }
2523
2524 static ir_node *array_access_to_firm(
2525                 const array_access_expression_t *expression)
2526 {
2527         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2528         ir_node  *addr   = array_access_addr(expression);
2529         type_t   *type   = revert_automatic_type_conversion(
2530                         (const expression_t*) expression);
2531         type             = skip_typeref(type);
2532
2533         return deref_address(dbgi, type, addr);
2534 }
2535
2536 static long get_offsetof_offset(const offsetof_expression_t *expression)
2537 {
2538         type_t *orig_type = expression->type;
2539         long    offset    = 0;
2540
2541         designator_t *designator = expression->designator;
2542         for ( ; designator != NULL; designator = designator->next) {
2543                 type_t *type = skip_typeref(orig_type);
2544                 /* be sure the type is constructed */
2545                 (void) get_ir_type(type);
2546
2547                 if (designator->symbol != NULL) {
2548                         assert(is_type_compound(type));
2549                         symbol_t *symbol = designator->symbol;
2550
2551                         compound_t *compound = type->compound.compound;
2552                         entity_t   *iter     = compound->members.entities;
2553                         for ( ; iter != NULL; iter = iter->base.next) {
2554                                 if (iter->base.symbol == symbol) {
2555                                         break;
2556                                 }
2557                         }
2558                         assert(iter != NULL);
2559
2560                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2561                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2562                         offset += get_entity_offset(iter->compound_member.entity);
2563
2564                         orig_type = iter->declaration.type;
2565                 } else {
2566                         expression_t *array_index = designator->array_index;
2567                         assert(designator->array_index != NULL);
2568                         assert(is_type_array(type));
2569
2570                         long index         = fold_constant(array_index);
2571                         ir_type *arr_type  = get_ir_type(type);
2572                         ir_type *elem_type = get_array_element_type(arr_type);
2573                         long     elem_size = get_type_size_bytes(elem_type);
2574
2575                         offset += index * elem_size;
2576
2577                         orig_type = type->array.element_type;
2578                 }
2579         }
2580
2581         return offset;
2582 }
2583
2584 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2585 {
2586         ir_mode  *mode   = get_ir_mode(expression->base.type);
2587         long      offset = get_offsetof_offset(expression);
2588         tarval   *tv     = new_tarval_from_long(offset, mode);
2589         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2590
2591         return new_d_Const(dbgi, tv);
2592 }
2593
2594 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2595                                      ir_entity *entity, type_t *type);
2596
2597 static ir_node *compound_literal_to_firm(
2598                 const compound_literal_expression_t *expression)
2599 {
2600         type_t *type = expression->type;
2601
2602         /* create an entity on the stack */
2603         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2604
2605         ident     *const id     = id_unique("CompLit.%u");
2606         ir_type   *const irtype = get_ir_type(type);
2607         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2608         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2609         set_entity_ld_ident(entity, id);
2610
2611         set_entity_variability(entity, variability_uninitialized);
2612
2613         /* create initialisation code */
2614         initializer_t *initializer = expression->initializer;
2615         create_local_initializer(initializer, dbgi, entity, type);
2616
2617         /* create a sel for the compound literal address */
2618         ir_node *frame = get_local_frame(entity);
2619         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2620         return sel;
2621 }
2622
2623 /**
2624  * Transform a sizeof expression into Firm code.
2625  */
2626 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2627 {
2628         type_t *type = expression->type;
2629         if (type == NULL) {
2630                 type = expression->tp_expression->base.type;
2631                 assert(type != NULL);
2632         }
2633
2634         type = skip_typeref(type);
2635         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2636         if (is_type_array(type) && type->array.is_vla
2637                         && expression->tp_expression != NULL) {
2638                 expression_to_firm(expression->tp_expression);
2639         }
2640
2641         return get_type_size(type);
2642 }
2643
2644 /**
2645  * Transform an alignof expression into Firm code.
2646  */
2647 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2648 {
2649         type_t *type = expression->type;
2650         if (type == NULL) {
2651                 /* beware: if expression is a variable reference, return the
2652                    alignment of the variable. */
2653                 const expression_t *tp_expression = expression->tp_expression;
2654                 const entity_t     *entity        = expression_is_variable(tp_expression);
2655                 if (entity != NULL) {
2656                         /* TODO: get the alignment of this variable. */
2657                         (void) entity;
2658                 }
2659                 type = tp_expression->base.type;
2660                 assert(type != NULL);
2661         }
2662
2663         ir_mode *const mode = get_ir_mode(expression->base.type);
2664         symconst_symbol sym;
2665         sym.type_p = get_ir_type(type);
2666         return new_SymConst(mode, sym, symconst_type_align);
2667 }
2668
2669 static void init_ir_types(void);
2670
2671 long fold_constant(const expression_t *expression)
2672 {
2673         assert(is_type_valid(skip_typeref(expression->base.type)));
2674
2675         bool constant_folding_old = constant_folding;
2676         constant_folding = true;
2677
2678         init_ir_types();
2679
2680         assert(is_constant_expression(expression));
2681
2682         ir_graph *old_current_ir_graph = current_ir_graph;
2683         if (current_ir_graph == NULL) {
2684                 current_ir_graph = get_const_code_irg();
2685         }
2686
2687         ir_node *cnst = expression_to_firm(expression);
2688         current_ir_graph = old_current_ir_graph;
2689
2690         if (!is_Const(cnst)) {
2691                 panic("couldn't fold constant\n");
2692         }
2693
2694         tarval *tv = get_Const_tarval(cnst);
2695         if (!tarval_is_long(tv)) {
2696                 panic("result of constant folding is not integer\n");
2697         }
2698
2699         constant_folding = constant_folding_old;
2700
2701         return get_tarval_long(tv);
2702 }
2703
2704 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2705 {
2706         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2707
2708         /* first try to fold a constant condition */
2709         if (is_constant_expression(expression->condition)) {
2710                 long val = fold_constant(expression->condition);
2711                 if (val) {
2712                         expression_t *true_expression = expression->true_expression;
2713                         if (true_expression == NULL)
2714                                 true_expression = expression->condition;
2715                         return expression_to_firm(true_expression);
2716                 } else {
2717                         return expression_to_firm(expression->false_expression);
2718                 }
2719         }
2720
2721         ir_node *cur_block   = get_cur_block();
2722
2723         /* create the true block */
2724         ir_node *true_block  = new_immBlock();
2725
2726         ir_node *true_val = expression->true_expression != NULL ?
2727                 expression_to_firm(expression->true_expression) : NULL;
2728         ir_node *true_jmp = new_Jmp();
2729
2730         /* create the false block */
2731         ir_node *false_block = new_immBlock();
2732
2733         ir_node *false_val = expression_to_firm(expression->false_expression);
2734         ir_node *false_jmp = new_Jmp();
2735
2736         /* create the condition evaluation */
2737         set_cur_block(cur_block);
2738         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2739         if (expression->true_expression == NULL) {
2740                 if (cond_expr != NULL) {
2741                         true_val = cond_expr;
2742                 } else {
2743                         /* Condition ended with a short circuit (&&, ||, !) operation.
2744                          * Generate a "1" as value for the true branch. */
2745                         true_val = new_Const(get_mode_one(mode_Is));
2746                 }
2747         }
2748         mature_immBlock(true_block);
2749         mature_immBlock(false_block);
2750
2751         /* create the common block */
2752         ir_node *in_cf[2] = { true_jmp, false_jmp };
2753         new_Block(2, in_cf);
2754
2755         /* TODO improve static semantics, so either both or no values are NULL */
2756         if (true_val == NULL || false_val == NULL)
2757                 return NULL;
2758
2759         ir_node *in[2] = { true_val, false_val };
2760         ir_mode *mode  = get_irn_mode(true_val);
2761         assert(get_irn_mode(false_val) == mode);
2762         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2763
2764         return val;
2765 }
2766
2767 /**
2768  * Returns an IR-node representing the address of a field.
2769  */
2770 static ir_node *select_addr(const select_expression_t *expression)
2771 {
2772         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2773
2774         construct_select_compound(expression);
2775
2776         ir_node *compound_addr = expression_to_firm(expression->compound);
2777
2778         entity_t *entry = expression->compound_entry;
2779         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2780         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2781         ir_entity *irentity = entry->compound_member.entity;
2782
2783         assert(irentity != NULL);
2784
2785         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2786
2787         return sel;
2788 }
2789
2790 static ir_node *select_to_firm(const select_expression_t *expression)
2791 {
2792         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2793         ir_node  *addr = select_addr(expression);
2794         type_t   *type = revert_automatic_type_conversion(
2795                         (const expression_t*) expression);
2796         type           = skip_typeref(type);
2797
2798         entity_t *entry      = expression->compound_entry;
2799         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2800         type_t   *entry_type = skip_typeref(entry->declaration.type);
2801
2802         if (entry_type->kind == TYPE_BITFIELD) {
2803                 return bitfield_extract_to_firm(expression, addr);
2804         }
2805
2806         return deref_address(dbgi, type, addr);
2807 }
2808
2809 /* Values returned by __builtin_classify_type. */
2810 typedef enum gcc_type_class
2811 {
2812         no_type_class = -1,
2813         void_type_class,
2814         integer_type_class,
2815         char_type_class,
2816         enumeral_type_class,
2817         boolean_type_class,
2818         pointer_type_class,
2819         reference_type_class,
2820         offset_type_class,
2821         real_type_class,
2822         complex_type_class,
2823         function_type_class,
2824         method_type_class,
2825         record_type_class,
2826         union_type_class,
2827         array_type_class,
2828         string_type_class,
2829         set_type_class,
2830         file_type_class,
2831         lang_type_class
2832 } gcc_type_class;
2833
2834 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2835 {
2836         type_t *type = expr->type_expression->base.type;
2837
2838         /* FIXME gcc returns different values depending on whether compiling C or C++
2839          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2840         gcc_type_class tc;
2841         for (;;) {
2842                 type = skip_typeref(type);
2843                 switch (type->kind) {
2844                         case TYPE_ATOMIC: {
2845                                 const atomic_type_t *const atomic_type = &type->atomic;
2846                                 switch (atomic_type->akind) {
2847                                         /* should not be reached */
2848                                         case ATOMIC_TYPE_INVALID:
2849                                                 tc = no_type_class;
2850                                                 goto make_const;
2851
2852                                         /* gcc cannot do that */
2853                                         case ATOMIC_TYPE_VOID:
2854                                                 tc = void_type_class;
2855                                                 goto make_const;
2856
2857                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2858                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2859                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2860                                         case ATOMIC_TYPE_SHORT:
2861                                         case ATOMIC_TYPE_USHORT:
2862                                         case ATOMIC_TYPE_INT:
2863                                         case ATOMIC_TYPE_UINT:
2864                                         case ATOMIC_TYPE_LONG:
2865                                         case ATOMIC_TYPE_ULONG:
2866                                         case ATOMIC_TYPE_LONGLONG:
2867                                         case ATOMIC_TYPE_ULONGLONG:
2868                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2869                                                 tc = integer_type_class;
2870                                                 goto make_const;
2871
2872                                         case ATOMIC_TYPE_FLOAT:
2873                                         case ATOMIC_TYPE_DOUBLE:
2874                                         case ATOMIC_TYPE_LONG_DOUBLE:
2875                                                 tc = real_type_class;
2876                                                 goto make_const;
2877                                 }
2878                                 panic("Unexpected atomic type in classify_type_to_firm().");
2879                         }
2880
2881                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2882                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2883                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2884                         case TYPE_ARRAY:           /* gcc handles this as pointer */
2885                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
2886                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2887                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2888                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2889
2890                         /* gcc handles this as integer */
2891                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2892
2893                         /* gcc classifies the referenced type */
2894                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2895
2896                         case TYPE_BUILTIN:
2897                         /* typedef/typeof should be skipped already */
2898                         case TYPE_TYPEDEF:
2899                         case TYPE_TYPEOF:
2900                         case TYPE_INVALID:
2901                         case TYPE_ERROR:
2902                                 break;
2903                 }
2904                 panic("unexpected TYPE classify_type_to_firm().");
2905         }
2906
2907 make_const:;
2908         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2909         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
2910         return new_d_Const(dbgi, tv);
2911 }
2912
2913 static ir_node *function_name_to_firm(
2914                 const funcname_expression_t *const expr)
2915 {
2916         switch(expr->kind) {
2917         case FUNCNAME_FUNCTION:
2918         case FUNCNAME_PRETTY_FUNCTION:
2919         case FUNCNAME_FUNCDNAME:
2920                 if (current_function_name == NULL) {
2921                         const source_position_t *const src_pos = &expr->base.source_position;
2922                         const char    *name  = current_function_entity->base.symbol->string;
2923                         const string_t string = { name, strlen(name) + 1 };
2924                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2925                 }
2926                 return current_function_name;
2927         case FUNCNAME_FUNCSIG:
2928                 if (current_funcsig == NULL) {
2929                         const source_position_t *const src_pos = &expr->base.source_position;
2930                         ir_entity *ent = get_irg_entity(current_ir_graph);
2931                         const char *const name = get_entity_ld_name(ent);
2932                         const string_t string = { name, strlen(name) + 1 };
2933                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2934                 }
2935                 return current_funcsig;
2936         }
2937         panic("Unsupported function name");
2938 }
2939
2940 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2941 {
2942         statement_t *statement = expr->statement;
2943
2944         assert(statement->kind == STATEMENT_COMPOUND);
2945         return compound_statement_to_firm(&statement->compound);
2946 }
2947
2948 static ir_node *va_start_expression_to_firm(
2949         const va_start_expression_t *const expr)
2950 {
2951         type_t    *const type        = current_function_entity->declaration.type;
2952         ir_type   *const method_type = get_ir_type(type);
2953         int        const n           = get_method_n_params(method_type) - 1;
2954         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2955         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2956         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2957         ir_node   *const no_mem      = new_NoMem();
2958         ir_node   *const arg_sel     =
2959                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2960
2961         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
2962         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2963         set_value_for_expression(expr->ap, add);
2964
2965         return NULL;
2966 }
2967
2968 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2969 {
2970         type_t       *const type    = expr->base.type;
2971         expression_t *const ap_expr = expr->ap;
2972         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2973         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2974         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2975         ir_node      *const res     = deref_address(dbgi, type, ap);
2976
2977         ir_node      *const cnst    = get_type_size(expr->base.type);
2978         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2979
2980         set_value_for_expression_addr(ap_expr, add, ap_addr);
2981
2982         return res;
2983 }
2984
2985 static ir_node *dereference_addr(const unary_expression_t *const expression)
2986 {
2987         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2988         return expression_to_firm(expression->value);
2989 }
2990
2991 /**
2992  * Returns a IR-node representing an lvalue of the given expression.
2993  */
2994 static ir_node *expression_to_addr(const expression_t *expression)
2995 {
2996         switch(expression->kind) {
2997         case EXPR_REFERENCE:
2998                 return reference_addr(&expression->reference);
2999         case EXPR_ARRAY_ACCESS:
3000                 return array_access_addr(&expression->array_access);
3001         case EXPR_SELECT:
3002                 return select_addr(&expression->select);
3003         case EXPR_CALL:
3004                 return call_expression_to_firm(&expression->call);
3005         case EXPR_UNARY_DEREFERENCE: {
3006                 return dereference_addr(&expression->unary);
3007         }
3008         default:
3009                 break;
3010         }
3011         panic("trying to get address of non-lvalue");
3012 }
3013
3014 static ir_node *builtin_constant_to_firm(
3015                 const builtin_constant_expression_t *expression)
3016 {
3017         ir_mode *mode = get_ir_mode(expression->base.type);
3018         long     v;
3019
3020         if (is_constant_expression(expression->value)) {
3021                 v = 1;
3022         } else {
3023                 v = 0;
3024         }
3025         return new_Const_long(mode, v);
3026 }
3027
3028 static ir_node *builtin_prefetch_to_firm(
3029                 const builtin_prefetch_expression_t *expression)
3030 {
3031         ir_node *adr = expression_to_firm(expression->adr);
3032         /* no Firm support for prefetch yet */
3033         (void) adr;
3034         return NULL;
3035 }
3036
3037 static ir_node *get_label_block(label_t *label)
3038 {
3039         if (label->block != NULL)
3040                 return label->block;
3041
3042         /* beware: might be called from create initializer with current_ir_graph
3043          * set to const_code_irg. */
3044         ir_graph *rem    = current_ir_graph;
3045         current_ir_graph = current_function;
3046
3047         ir_node *old_cur_block = get_cur_block();
3048         ir_node *block         = new_immBlock();
3049         set_cur_block(old_cur_block);
3050
3051         label->block = block;
3052
3053         ARR_APP1(label_t *, all_labels, label);
3054
3055         current_ir_graph = rem;
3056         return block;
3057 }
3058
3059 /**
3060  * Pointer to a label.  This is used for the
3061  * GNU address-of-label extension.
3062  */
3063 static ir_node *label_address_to_firm(
3064                 const label_address_expression_t *label)
3065 {
3066         ir_node    *block = get_label_block(label->label);
3067         ir_label_t  nr    = get_Block_label(block);
3068
3069         if (nr == 0) {
3070                 nr = get_irp_next_label_nr();
3071                 set_Block_label(block, nr);
3072         }
3073         symconst_symbol value;
3074         value.label = nr;
3075         return new_SymConst(mode_P_code, value, symconst_label);
3076 }
3077
3078 static ir_node *builtin_symbol_to_firm(
3079                 const builtin_symbol_expression_t *expression)
3080 {
3081         /* for gcc compatibility we have to produce (dummy) addresses for some
3082          * builtins */
3083         if (warning.other) {
3084                 warningf(&expression->base.source_position,
3085                                  "taking address of builtin '%Y'", expression->symbol);
3086         }
3087
3088         /* simply create a NULL pointer */
3089         ir_mode  *mode = get_ir_mode(type_void_ptr);
3090         ir_node  *res  = new_Const_long(mode, 0);
3091
3092         return res;
3093 }
3094
3095 /**
3096  * creates firm nodes for an expression. The difference between this function
3097  * and expression_to_firm is, that this version might produce mode_b nodes
3098  * instead of mode_Is.
3099  */
3100 static ir_node *_expression_to_firm(const expression_t *expression)
3101 {
3102 #ifndef NDEBUG
3103         if (!constant_folding) {
3104                 assert(!expression->base.transformed);
3105                 ((expression_t*) expression)->base.transformed = true;
3106         }
3107 #endif
3108
3109         switch (expression->kind) {
3110         case EXPR_CHARACTER_CONSTANT:
3111                 return character_constant_to_firm(&expression->conste);
3112         case EXPR_WIDE_CHARACTER_CONSTANT:
3113                 return wide_character_constant_to_firm(&expression->conste);
3114         case EXPR_CONST:
3115                 return const_to_firm(&expression->conste);
3116         case EXPR_STRING_LITERAL:
3117                 return string_literal_to_firm(&expression->string);
3118         case EXPR_WIDE_STRING_LITERAL:
3119                 return wide_string_literal_to_firm(&expression->wide_string);
3120         case EXPR_REFERENCE:
3121                 return reference_expression_to_firm(&expression->reference);
3122         case EXPR_REFERENCE_ENUM_VALUE:
3123                 return reference_expression_enum_value_to_firm(&expression->reference);
3124         case EXPR_CALL:
3125                 return call_expression_to_firm(&expression->call);
3126         EXPR_UNARY_CASES
3127                 return unary_expression_to_firm(&expression->unary);
3128         EXPR_BINARY_CASES
3129                 return binary_expression_to_firm(&expression->binary);
3130         case EXPR_ARRAY_ACCESS:
3131                 return array_access_to_firm(&expression->array_access);
3132         case EXPR_SIZEOF:
3133                 return sizeof_to_firm(&expression->typeprop);
3134         case EXPR_ALIGNOF:
3135                 return alignof_to_firm(&expression->typeprop);
3136         case EXPR_CONDITIONAL:
3137                 return conditional_to_firm(&expression->conditional);
3138         case EXPR_SELECT:
3139                 return select_to_firm(&expression->select);
3140         case EXPR_CLASSIFY_TYPE:
3141                 return classify_type_to_firm(&expression->classify_type);
3142         case EXPR_FUNCNAME:
3143                 return function_name_to_firm(&expression->funcname);
3144         case EXPR_STATEMENT:
3145                 return statement_expression_to_firm(&expression->statement);
3146         case EXPR_VA_START:
3147                 return va_start_expression_to_firm(&expression->va_starte);
3148         case EXPR_VA_ARG:
3149                 return va_arg_expression_to_firm(&expression->va_arge);
3150         case EXPR_BUILTIN_SYMBOL:
3151                 return builtin_symbol_to_firm(&expression->builtin_symbol);
3152         case EXPR_BUILTIN_CONSTANT_P:
3153                 return builtin_constant_to_firm(&expression->builtin_constant);
3154         case EXPR_BUILTIN_PREFETCH:
3155                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3156         case EXPR_OFFSETOF:
3157                 return offsetof_to_firm(&expression->offsetofe);
3158         case EXPR_COMPOUND_LITERAL:
3159                 return compound_literal_to_firm(&expression->compound_literal);
3160         case EXPR_LABEL_ADDRESS:
3161                 return label_address_to_firm(&expression->label_address);
3162
3163         case EXPR_UNKNOWN:
3164         case EXPR_INVALID:
3165                 break;
3166         }
3167         panic("invalid expression found");
3168 }
3169
3170 static bool is_builtin_expect(const expression_t *expression)
3171 {
3172         if (expression->kind != EXPR_CALL)
3173                 return false;
3174
3175         expression_t *function = expression->call.function;
3176         if (function->kind != EXPR_BUILTIN_SYMBOL)
3177                 return false;
3178         if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3179                 return false;
3180
3181         return true;
3182 }
3183
3184 static bool produces_mode_b(const expression_t *expression)
3185 {
3186         switch (expression->kind) {
3187         case EXPR_BINARY_EQUAL:
3188         case EXPR_BINARY_NOTEQUAL:
3189         case EXPR_BINARY_LESS:
3190         case EXPR_BINARY_LESSEQUAL:
3191         case EXPR_BINARY_GREATER:
3192         case EXPR_BINARY_GREATEREQUAL:
3193         case EXPR_BINARY_ISGREATER:
3194         case EXPR_BINARY_ISGREATEREQUAL:
3195         case EXPR_BINARY_ISLESS:
3196         case EXPR_BINARY_ISLESSEQUAL:
3197         case EXPR_BINARY_ISLESSGREATER:
3198         case EXPR_BINARY_ISUNORDERED:
3199         case EXPR_UNARY_NOT:
3200                 return true;
3201
3202         case EXPR_CALL:
3203                 if (is_builtin_expect(expression)) {
3204                         expression_t *argument = expression->call.arguments->expression;
3205                         return produces_mode_b(argument);
3206                 }
3207                 return false;
3208         case EXPR_BINARY_COMMA:
3209                 return produces_mode_b(expression->binary.right);
3210
3211         default:
3212                 return false;
3213         }
3214 }
3215
3216 static ir_node *expression_to_firm(const expression_t *expression)
3217 {
3218         if (!produces_mode_b(expression)) {
3219                 ir_node *res = _expression_to_firm(expression);
3220                 assert(res == NULL || get_irn_mode(res) != mode_b);
3221                 return res;
3222         }
3223
3224         if (is_constant_expression(expression)) {
3225                 ir_node *res  = _expression_to_firm(expression);
3226                 ir_mode *mode = get_ir_mode(expression->base.type);
3227                 assert(is_Const(res));
3228                 if (is_Const_null(res)) {
3229                         return new_Const_long(mode, 0);
3230                 } else {
3231                         return new_Const_long(mode, 1);
3232                 }
3233         }
3234
3235         /* we have to produce a 0/1 from the mode_b expression */
3236         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3237         return produce_condition_result(expression, dbgi);
3238 }
3239
3240 /**
3241  * create a short-circuit expression evaluation that tries to construct
3242  * efficient control flow structures for &&, || and ! expressions
3243  */
3244 static ir_node *create_condition_evaluation(const expression_t *expression,
3245                                             ir_node *true_block,
3246                                             ir_node *false_block)
3247 {
3248         switch(expression->kind) {
3249         case EXPR_UNARY_NOT: {
3250                 const unary_expression_t *unary_expression = &expression->unary;
3251                 create_condition_evaluation(unary_expression->value, false_block,
3252                                             true_block);
3253                 return NULL;
3254         }
3255         case EXPR_BINARY_LOGICAL_AND: {
3256                 const binary_expression_t *binary_expression = &expression->binary;
3257
3258                 ir_node *cur_block   = get_cur_block();
3259                 ir_node *extra_block = new_immBlock();
3260                 set_cur_block(cur_block);
3261                 create_condition_evaluation(binary_expression->left, extra_block,
3262                                             false_block);
3263                 mature_immBlock(extra_block);
3264                 set_cur_block(extra_block);
3265                 create_condition_evaluation(binary_expression->right, true_block,
3266                                             false_block);
3267                 return NULL;
3268         }
3269         case EXPR_BINARY_LOGICAL_OR: {
3270                 const binary_expression_t *binary_expression = &expression->binary;
3271
3272                 ir_node *cur_block   = get_cur_block();
3273                 ir_node *extra_block = new_immBlock();
3274                 set_cur_block(cur_block);
3275                 create_condition_evaluation(binary_expression->left, true_block,
3276                                             extra_block);
3277                 mature_immBlock(extra_block);
3278                 set_cur_block(extra_block);
3279                 create_condition_evaluation(binary_expression->right, true_block,
3280                                             false_block);
3281                 return NULL;
3282         }
3283         default:
3284                 break;
3285         }
3286
3287         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3288         ir_node  *cond_expr  = _expression_to_firm(expression);
3289         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3290         ir_node  *cond       = new_d_Cond(dbgi, condition);
3291         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3292         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3293
3294         /* set branch prediction info based on __builtin_expect */
3295         if (is_builtin_expect(expression)) {
3296                 call_argument_t *argument = expression->call.arguments->next;
3297                 if (is_constant_expression(argument->expression)) {
3298                         long               cnst = fold_constant(argument->expression);
3299                         cond_jmp_predicate pred;
3300
3301                         if (cnst == 0) {
3302                                 pred = COND_JMP_PRED_FALSE;
3303                         } else {
3304                                 pred = COND_JMP_PRED_TRUE;
3305                         }
3306                         set_Cond_jmp_pred(cond, pred);
3307                 }
3308         }
3309
3310         add_immBlock_pred(true_block, true_proj);
3311         if (false_block != NULL) {
3312                 add_immBlock_pred(false_block, false_proj);
3313         }
3314
3315         set_cur_block(NULL);
3316         return cond_expr;
3317 }
3318
3319
3320 static void create_variable_entity(entity_t *variable,
3321                                    declaration_kind_t declaration_kind,
3322                                    ir_type *parent_type)
3323 {
3324         assert(variable->kind == ENTITY_VARIABLE);
3325         type_t    *const type     = skip_typeref(variable->declaration.type);
3326         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3327         ir_type   *const irtype   = get_ir_type(type);
3328         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3329         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3330
3331         handle_gnu_attributes_ent(irentity, variable);
3332
3333         variable->declaration.kind  = (unsigned char) declaration_kind;
3334         variable->variable.v.entity = irentity;
3335         set_entity_variability(irentity, variability_uninitialized);
3336         set_entity_ld_ident(irentity, create_ld_ident(variable));
3337         if (parent_type == get_tls_type())
3338                 set_entity_allocation(irentity, allocation_automatic);
3339         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3340                 set_entity_allocation(irentity, allocation_static);
3341
3342         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3343                 set_entity_volatility(irentity, volatility_is_volatile);
3344         }
3345 }
3346
3347
3348 typedef struct type_path_entry_t type_path_entry_t;
3349 struct type_path_entry_t {
3350         type_t           *type;
3351         ir_initializer_t *initializer;
3352         size_t            index;
3353         entity_t         *compound_entry;
3354 };
3355
3356 typedef struct type_path_t type_path_t;
3357 struct type_path_t {
3358         type_path_entry_t *path;
3359         type_t            *top_type;
3360         bool               invalid;
3361 };
3362
3363 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3364 {
3365         size_t len = ARR_LEN(path->path);
3366
3367         for (size_t i = 0; i < len; ++i) {
3368                 const type_path_entry_t *entry = & path->path[i];
3369
3370                 type_t *type = skip_typeref(entry->type);
3371                 if (is_type_compound(type)) {
3372                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3373                 } else if (is_type_array(type)) {
3374                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3375                 } else {
3376                         fprintf(stderr, "-INVALID-");
3377                 }
3378         }
3379         fprintf(stderr, "  (");
3380         print_type(path->top_type);
3381         fprintf(stderr, ")");
3382 }
3383
3384 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3385 {
3386         size_t len = ARR_LEN(path->path);
3387         assert(len > 0);
3388         return & path->path[len-1];
3389 }
3390
3391 static type_path_entry_t *append_to_type_path(type_path_t *path)
3392 {
3393         size_t len = ARR_LEN(path->path);
3394         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3395
3396         type_path_entry_t *result = & path->path[len];
3397         memset(result, 0, sizeof(result[0]));
3398         return result;
3399 }
3400
3401 static size_t get_compound_member_count(const compound_type_t *type)
3402 {
3403         compound_t *compound  = type->compound;
3404         size_t      n_members = 0;
3405         entity_t   *member    = compound->members.entities;
3406         for ( ; member != NULL; member = member->base.next) {
3407                 ++n_members;
3408         }
3409
3410         return n_members;
3411 }
3412
3413 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3414 {
3415         type_t *orig_top_type = path->top_type;
3416         type_t *top_type      = skip_typeref(orig_top_type);
3417
3418         assert(is_type_compound(top_type) || is_type_array(top_type));
3419
3420         if (ARR_LEN(path->path) == 0) {
3421                 return NULL;
3422         } else {
3423                 type_path_entry_t *top         = get_type_path_top(path);
3424                 ir_initializer_t  *initializer = top->initializer;
3425                 return get_initializer_compound_value(initializer, top->index);
3426         }
3427 }
3428
3429 static void descend_into_subtype(type_path_t *path)
3430 {
3431         type_t *orig_top_type = path->top_type;
3432         type_t *top_type      = skip_typeref(orig_top_type);
3433
3434         assert(is_type_compound(top_type) || is_type_array(top_type));
3435
3436         ir_initializer_t *initializer = get_initializer_entry(path);
3437
3438         type_path_entry_t *top = append_to_type_path(path);
3439         top->type              = top_type;
3440
3441         size_t len;
3442
3443         if (is_type_compound(top_type)) {
3444                 compound_t *compound = top_type->compound.compound;
3445                 entity_t   *entry    = compound->members.entities;
3446
3447                 top->compound_entry = entry;
3448                 top->index          = 0;
3449                 len                 = get_compound_member_count(&top_type->compound);
3450                 if (entry != NULL) {
3451                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3452                         path->top_type = entry->declaration.type;
3453                 }
3454         } else {
3455                 assert(is_type_array(top_type));
3456                 assert(top_type->array.size > 0);
3457
3458                 top->index     = 0;
3459                 path->top_type = top_type->array.element_type;
3460                 len            = top_type->array.size;
3461         }
3462         if (initializer == NULL
3463                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3464                 initializer = create_initializer_compound(len);
3465                 /* we have to set the entry at the 2nd latest path entry... */
3466                 size_t path_len = ARR_LEN(path->path);
3467                 assert(path_len >= 1);
3468                 if (path_len > 1) {
3469                         type_path_entry_t *entry        = & path->path[path_len-2];
3470                         ir_initializer_t  *tinitializer = entry->initializer;
3471                         set_initializer_compound_value(tinitializer, entry->index,
3472                                                        initializer);
3473                 }
3474         }
3475         top->initializer = initializer;
3476 }
3477
3478 static void ascend_from_subtype(type_path_t *path)
3479 {
3480         type_path_entry_t *top = get_type_path_top(path);
3481
3482         path->top_type = top->type;
3483
3484         size_t len = ARR_LEN(path->path);
3485         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3486 }
3487
3488 static void walk_designator(type_path_t *path, const designator_t *designator)
3489 {
3490         /* designators start at current object type */
3491         ARR_RESIZE(type_path_entry_t, path->path, 1);
3492
3493         for ( ; designator != NULL; designator = designator->next) {
3494                 type_path_entry_t *top         = get_type_path_top(path);
3495                 type_t            *orig_type   = top->type;
3496                 type_t            *type        = skip_typeref(orig_type);
3497
3498                 if (designator->symbol != NULL) {
3499                         assert(is_type_compound(type));
3500                         size_t    index  = 0;
3501                         symbol_t *symbol = designator->symbol;
3502
3503                         compound_t *compound = type->compound.compound;
3504                         entity_t   *iter     = compound->members.entities;
3505                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3506                                 if (iter->base.symbol == symbol) {
3507                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3508                                         break;
3509                                 }
3510                         }
3511                         assert(iter != NULL);
3512
3513                         top->type           = orig_type;
3514                         top->compound_entry = iter;
3515                         top->index          = index;
3516                         orig_type           = iter->declaration.type;
3517                 } else {
3518                         expression_t *array_index = designator->array_index;
3519                         assert(designator->array_index != NULL);
3520                         assert(is_type_array(type));
3521
3522                         long index = fold_constant(array_index);
3523                         assert(index >= 0);
3524 #ifndef NDEBUG
3525                         if (type->array.size_constant) {
3526                                 long array_size = type->array.size;
3527                                 assert(index < array_size);
3528                         }
3529 #endif
3530
3531                         top->type  = orig_type;
3532                         top->index = (size_t) index;
3533                         orig_type  = type->array.element_type;
3534                 }
3535                 path->top_type = orig_type;
3536
3537                 if (designator->next != NULL) {
3538                         descend_into_subtype(path);
3539                 }
3540         }
3541
3542         path->invalid  = false;
3543 }
3544
3545 static void advance_current_object(type_path_t *path)
3546 {
3547         if (path->invalid) {
3548                 /* TODO: handle this... */
3549                 panic("invalid initializer in ast2firm (excessive elements)");
3550         }
3551
3552         type_path_entry_t *top = get_type_path_top(path);
3553
3554         type_t *type = skip_typeref(top->type);
3555         if (is_type_union(type)) {
3556                 top->compound_entry = NULL;
3557         } else if (is_type_struct(type)) {
3558                 entity_t *entry = top->compound_entry;
3559
3560                 top->index++;
3561                 entry               = entry->base.next;
3562                 top->compound_entry = entry;
3563                 if (entry != NULL) {
3564                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3565                         path->top_type = entry->declaration.type;
3566                         return;
3567                 }
3568         } else {
3569                 assert(is_type_array(type));
3570
3571                 top->index++;
3572                 if (!type->array.size_constant || top->index < type->array.size) {
3573                         return;
3574                 }
3575         }
3576
3577         /* we're past the last member of the current sub-aggregate, try if we
3578          * can ascend in the type hierarchy and continue with another subobject */
3579         size_t len = ARR_LEN(path->path);
3580
3581         if (len > 1) {
3582                 ascend_from_subtype(path);
3583                 advance_current_object(path);
3584         } else {
3585                 path->invalid = true;
3586         }
3587 }
3588
3589
3590 static ir_initializer_t *create_ir_initializer(
3591                 const initializer_t *initializer, type_t *type);
3592
3593 static ir_initializer_t *create_ir_initializer_value(
3594                 const initializer_value_t *initializer)
3595 {
3596         if (is_type_compound(initializer->value->base.type)) {
3597                 panic("initializer creation for compounds not implemented yet");
3598         }
3599         ir_node *value = expression_to_firm(initializer->value);
3600         return create_initializer_const(value);
3601 }
3602
3603 /** test wether type can be initialized by a string constant */
3604 static bool is_string_type(type_t *type)
3605 {
3606         type_t *inner;
3607         if (is_type_pointer(type)) {
3608                 inner = skip_typeref(type->pointer.points_to);
3609         } else if(is_type_array(type)) {
3610                 inner = skip_typeref(type->array.element_type);
3611         } else {
3612                 return false;
3613         }
3614
3615         return is_type_integer(inner);
3616 }
3617
3618 static ir_initializer_t *create_ir_initializer_list(
3619                 const initializer_list_t *initializer, type_t *type)
3620 {
3621         type_path_t path;
3622         memset(&path, 0, sizeof(path));
3623         path.top_type = type;
3624         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3625
3626         descend_into_subtype(&path);
3627
3628         for (size_t i = 0; i < initializer->len; ++i) {
3629                 const initializer_t *sub_initializer = initializer->initializers[i];
3630
3631                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3632                         walk_designator(&path, sub_initializer->designator.designator);
3633                         continue;
3634                 }
3635
3636                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3637                         /* we might have to descend into types until we're at a scalar
3638                          * type */
3639                         while(true) {
3640                                 type_t *orig_top_type = path.top_type;
3641                                 type_t *top_type      = skip_typeref(orig_top_type);
3642
3643                                 if (is_type_scalar(top_type))
3644                                         break;
3645                                 descend_into_subtype(&path);
3646                         }
3647                 } else if (sub_initializer->kind == INITIALIZER_STRING
3648                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3649                         /* we might have to descend into types until we're at a scalar
3650                          * type */
3651                         while (true) {
3652                                 type_t *orig_top_type = path.top_type;
3653                                 type_t *top_type      = skip_typeref(orig_top_type);
3654
3655                                 if (is_string_type(top_type))
3656                                         break;
3657                                 descend_into_subtype(&path);
3658                         }
3659                 }
3660
3661                 ir_initializer_t *sub_irinitializer
3662                         = create_ir_initializer(sub_initializer, path.top_type);
3663
3664                 size_t path_len = ARR_LEN(path.path);
3665                 assert(path_len >= 1);
3666                 type_path_entry_t *entry        = & path.path[path_len-1];
3667                 ir_initializer_t  *tinitializer = entry->initializer;
3668                 set_initializer_compound_value(tinitializer, entry->index,
3669                                                sub_irinitializer);
3670
3671                 advance_current_object(&path);
3672         }
3673
3674         assert(ARR_LEN(path.path) >= 1);
3675         ir_initializer_t *result = path.path[0].initializer;
3676         DEL_ARR_F(path.path);
3677
3678         return result;
3679 }
3680
3681 static ir_initializer_t *create_ir_initializer_string(
3682                 const initializer_string_t *initializer, type_t *type)
3683 {
3684         type = skip_typeref(type);
3685
3686         size_t            string_len    = initializer->string.size;
3687         assert(type->kind == TYPE_ARRAY);
3688         assert(type->array.size_constant);
3689         size_t            len           = type->array.size;
3690         ir_initializer_t *irinitializer = create_initializer_compound(len);
3691
3692         const char *string = initializer->string.begin;
3693         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3694
3695         for (size_t i = 0; i < len; ++i) {
3696                 char c = 0;
3697                 if (i < string_len)
3698                         c = string[i];
3699
3700                 tarval           *tv = new_tarval_from_long(c, mode);
3701                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3702
3703                 set_initializer_compound_value(irinitializer, i, char_initializer);
3704         }
3705
3706         return irinitializer;
3707 }
3708
3709 static ir_initializer_t *create_ir_initializer_wide_string(
3710                 const initializer_wide_string_t *initializer, type_t *type)
3711 {
3712         size_t            string_len    = initializer->string.size;
3713         assert(type->kind == TYPE_ARRAY);
3714         assert(type->array.size_constant);
3715         size_t            len           = type->array.size;
3716         ir_initializer_t *irinitializer = create_initializer_compound(len);
3717
3718         const wchar_rep_t *string = initializer->string.begin;
3719         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3720
3721         for (size_t i = 0; i < len; ++i) {
3722                 wchar_rep_t c = 0;
3723                 if (i < string_len) {
3724                         c = string[i];
3725                 }
3726                 tarval *tv = new_tarval_from_long(c, mode);
3727                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3728
3729                 set_initializer_compound_value(irinitializer, i, char_initializer);
3730         }
3731
3732         return irinitializer;
3733 }
3734
3735 static ir_initializer_t *create_ir_initializer(
3736                 const initializer_t *initializer, type_t *type)
3737 {
3738         switch(initializer->kind) {
3739                 case INITIALIZER_STRING:
3740                         return create_ir_initializer_string(&initializer->string, type);
3741
3742                 case INITIALIZER_WIDE_STRING:
3743                         return create_ir_initializer_wide_string(&initializer->wide_string,
3744                                                                  type);
3745
3746                 case INITIALIZER_LIST:
3747                         return create_ir_initializer_list(&initializer->list, type);
3748
3749                 case INITIALIZER_VALUE:
3750                         return create_ir_initializer_value(&initializer->value);
3751
3752                 case INITIALIZER_DESIGNATOR:
3753                         panic("unexpected designator initializer found");
3754         }
3755         panic("unknown initializer");
3756 }
3757
3758 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3759                 ir_node *base_addr)
3760 {
3761         if (is_atomic_type(type)) {
3762                 ir_mode *mode = get_type_mode(type);
3763                 tarval  *zero = get_mode_null(mode);
3764                 ir_node *cnst = new_d_Const(dbgi, zero);
3765
3766                 /* TODO: bitfields */
3767                 ir_node *mem    = get_store();
3768                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3769                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3770                 set_store(proj_m);
3771         } else {
3772                 assert(is_compound_type(type));
3773
3774                 int n_members;
3775                 if (is_Array_type(type)) {
3776                         assert(has_array_upper_bound(type, 0));
3777                         n_members = get_array_upper_bound_int(type, 0);
3778                 } else {
3779                         n_members = get_compound_n_members(type);
3780                 }
3781
3782                 for (int i = 0; i < n_members; ++i) {
3783                         ir_node *addr;
3784                         ir_type *irtype;
3785                         if (is_Array_type(type)) {
3786                                 ir_entity *entity   = get_array_element_entity(type);
3787                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3788                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3789                                 ir_node   *in[1]    = { cnst };
3790                                 irtype = get_array_element_type(type);
3791                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3792                         } else {
3793                                 ir_entity *member = get_compound_member(type, i);
3794
3795                                 irtype = get_entity_type(member);
3796                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3797                         }
3798
3799                         create_dynamic_null_initializer(irtype, dbgi, addr);
3800                 }
3801         }
3802 }
3803
3804 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3805                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3806 {
3807         switch(get_initializer_kind(initializer)) {
3808         case IR_INITIALIZER_NULL: {
3809                 create_dynamic_null_initializer(type, dbgi, base_addr);
3810                 return;
3811         }
3812         case IR_INITIALIZER_CONST: {
3813                 ir_node *node     = get_initializer_const_value(initializer);
3814                 ir_mode *mode     = get_irn_mode(node);
3815                 ir_type *ent_type = get_entity_type(entity);
3816
3817                 /* is it a bitfield type? */
3818                 if (is_Primitive_type(ent_type) &&
3819                                 get_primitive_base_type(ent_type) != NULL) {
3820                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3821                         return;
3822                 }
3823
3824                 assert(get_type_mode(type) == mode);
3825                 ir_node *mem    = get_store();
3826                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3827                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3828                 set_store(proj_m);
3829                 return;
3830         }
3831         case IR_INITIALIZER_TARVAL: {
3832                 tarval  *tv       = get_initializer_tarval_value(initializer);
3833                 ir_mode *mode     = get_tarval_mode(tv);
3834                 ir_node *cnst     = new_d_Const(dbgi, tv);
3835                 ir_type *ent_type = get_entity_type(entity);
3836
3837                 /* is it a bitfield type? */
3838                 if (is_Primitive_type(ent_type) &&
3839                                 get_primitive_base_type(ent_type) != NULL) {
3840                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3841                         return;
3842                 }
3843
3844                 assert(get_type_mode(type) == mode);
3845                 ir_node *mem    = get_store();
3846                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3847                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3848                 set_store(proj_m);
3849                 return;
3850         }
3851         case IR_INITIALIZER_COMPOUND: {
3852                 assert(is_compound_type(type));
3853                 int n_members;
3854                 if (is_Array_type(type)) {
3855                         assert(has_array_upper_bound(type, 0));
3856                         n_members = get_array_upper_bound_int(type, 0);
3857                 } else {
3858                         n_members = get_compound_n_members(type);
3859                 }
3860
3861                 if (get_initializer_compound_n_entries(initializer)
3862                                 != (unsigned) n_members)
3863                         panic("initializer doesn't match compound type");
3864
3865                 for (int i = 0; i < n_members; ++i) {
3866                         ir_node   *addr;
3867                         ir_type   *irtype;
3868                         ir_entity *sub_entity;
3869                         if (is_Array_type(type)) {
3870                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3871                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3872                                 ir_node   *in[1]    = { cnst };
3873                                 irtype     = get_array_element_type(type);
3874                                 sub_entity = get_array_element_entity(type);
3875                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3876                                                        sub_entity);
3877                         } else {
3878                                 sub_entity = get_compound_member(type, i);
3879                                 irtype     = get_entity_type(sub_entity);
3880                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3881                                                              sub_entity);
3882                         }
3883
3884                         ir_initializer_t *sub_init
3885                                 = get_initializer_compound_value(initializer, i);
3886
3887                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3888                                                        addr);
3889                 }
3890                 return;
3891         }
3892         }
3893
3894         panic("invalid IR_INITIALIZER found");
3895 }
3896
3897 static void create_dynamic_initializer(ir_initializer_t *initializer,
3898                 dbg_info *dbgi, ir_entity *entity)
3899 {
3900         ir_node *frame     = get_local_frame(entity);
3901         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3902         ir_type *type      = get_entity_type(entity);
3903
3904         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3905 }
3906
3907 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3908                                      ir_entity *entity, type_t *type)
3909 {
3910         ir_node *memory = get_store();
3911         ir_node *nomem  = new_NoMem();
3912         ir_node *frame  = get_irg_frame(current_ir_graph);
3913         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3914
3915         if (initializer->kind == INITIALIZER_VALUE) {
3916                 initializer_value_t *initializer_value = &initializer->value;
3917
3918                 ir_node *value = expression_to_firm(initializer_value->value);
3919                 type = skip_typeref(type);
3920                 assign_value(dbgi, addr, type, value);
3921                 return;
3922         }
3923
3924         if (!is_constant_initializer(initializer)) {
3925                 ir_initializer_t *irinitializer
3926                         = create_ir_initializer(initializer, type);
3927
3928                 create_dynamic_initializer(irinitializer, dbgi, entity);
3929                 return;
3930         }
3931
3932         /* create the ir_initializer */
3933         ir_graph *const old_current_ir_graph = current_ir_graph;
3934         current_ir_graph = get_const_code_irg();
3935
3936         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3937
3938         assert(current_ir_graph == get_const_code_irg());
3939         current_ir_graph = old_current_ir_graph;
3940
3941         /* create a "template" entity which is copied to the entity on the stack */
3942         ident     *const id          = id_unique("initializer.%u");
3943         ir_type   *const irtype      = get_ir_type(type);
3944         ir_type   *const global_type = get_glob_type();
3945         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3946         set_entity_ld_ident(init_entity, id);
3947
3948         set_entity_variability(init_entity, variability_initialized);
3949         set_entity_visibility(init_entity, visibility_local);
3950         set_entity_allocation(init_entity, allocation_static);
3951
3952         set_entity_initializer(init_entity, irinitializer);
3953
3954         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3955         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3956
3957         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3958         set_store(copyb_mem);
3959 }
3960
3961 static void create_initializer_local_variable_entity(entity_t *entity)
3962 {
3963         assert(entity->kind == ENTITY_VARIABLE);
3964         initializer_t *initializer = entity->variable.initializer;
3965         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
3966         ir_entity     *irentity    = entity->variable.v.entity;
3967         type_t        *type        = entity->declaration.type;
3968         create_local_initializer(initializer, dbgi, irentity, type);
3969 }
3970
3971 static void create_variable_initializer(entity_t *entity)
3972 {
3973         assert(entity->kind == ENTITY_VARIABLE);
3974         initializer_t *initializer = entity->variable.initializer;
3975         if (initializer == NULL)
3976                 return;
3977
3978         declaration_kind_t declaration_kind
3979                 = (declaration_kind_t) entity->declaration.kind;
3980         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3981                 create_initializer_local_variable_entity(entity);
3982                 return;
3983         }
3984
3985         type_t            *type = entity->declaration.type;
3986         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3987
3988         if (initializer->kind == INITIALIZER_VALUE) {
3989                 initializer_value_t *initializer_value = &initializer->value;
3990                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
3991
3992                 ir_node *value = expression_to_firm(initializer_value->value);
3993                 value = do_strict_conv(dbgi, value);
3994
3995                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3996                         set_value(entity->variable.v.value_number, value);
3997                 } else {
3998                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3999
4000                         ir_entity *irentity = entity->variable.v.entity;
4001
4002                         if (tq & TYPE_QUALIFIER_CONST) {
4003                                 set_entity_variability(irentity, variability_constant);
4004                         } else {
4005                                 set_entity_variability(irentity, variability_initialized);
4006                         }
4007                         set_atomic_ent_value(irentity, value);
4008                 }
4009         } else {
4010                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4011                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4012
4013                 ir_entity        *irentity        = entity->variable.v.entity;
4014                 ir_initializer_t *irinitializer
4015                         = create_ir_initializer(initializer, type);
4016
4017                 if (tq & TYPE_QUALIFIER_CONST) {
4018                         set_entity_variability(irentity, variability_constant);
4019                 } else {
4020                         set_entity_variability(irentity, variability_initialized);
4021                 }
4022                 set_entity_initializer(irentity, irinitializer);
4023         }
4024 }
4025
4026 static void create_variable_length_array(entity_t *entity)
4027 {
4028         assert(entity->kind == ENTITY_VARIABLE);
4029         assert(entity->variable.initializer == NULL);
4030
4031         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4032         entity->variable.v.vla_base = NULL;
4033
4034         /* TODO: record VLA somewhere so we create the free node when we leave
4035          * it's scope */
4036 }
4037
4038 static void allocate_variable_length_array(entity_t *entity)
4039 {
4040         assert(entity->kind == ENTITY_VARIABLE);
4041         assert(entity->variable.initializer == NULL);
4042         assert(get_cur_block() != NULL);
4043
4044         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4045         type_t   *type      = entity->declaration.type;
4046         ir_type  *el_type   = get_ir_type(type->array.element_type);
4047
4048         /* make sure size_node is calculated */
4049         get_type_size(type);
4050         ir_node  *elems = type->array.size_node;
4051         ir_node  *mem   = get_store();
4052         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4053
4054         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4055         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4056         set_store(proj_m);
4057
4058         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4059         entity->variable.v.vla_base = addr;
4060 }
4061
4062 /**
4063  * Creates a Firm local variable from a declaration.
4064  */
4065 static void create_local_variable(entity_t *entity)
4066 {
4067         assert(entity->kind == ENTITY_VARIABLE);
4068         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4069
4070         bool needs_entity = entity->variable.address_taken;
4071         type_t *type = skip_typeref(entity->declaration.type);
4072
4073         /* is it a variable length array? */
4074         if (is_type_array(type) && !type->array.size_constant) {
4075                 create_variable_length_array(entity);
4076                 return;
4077         } else if (is_type_array(type) || is_type_compound(type)) {
4078                 needs_entity = true;
4079         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4080                 needs_entity = true;
4081         }
4082
4083         if (needs_entity) {
4084                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4085                 create_variable_entity(entity,
4086                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4087                                        frame_type);
4088         } else {
4089                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4090                 entity->variable.v.value_number = next_value_number_function;
4091                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4092                                         entity);
4093                 ++next_value_number_function;
4094         }
4095 }
4096
4097 static void create_local_static_variable(entity_t *entity)
4098 {
4099         assert(entity->kind == ENTITY_VARIABLE);
4100         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4101
4102         type_t    *const type     = skip_typeref(entity->declaration.type);
4103         ir_type   *const var_type = entity->variable.thread_local ?
4104                 get_tls_type() : get_glob_type();
4105         ir_type   *const irtype   = get_ir_type(type);
4106         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4107
4108         size_t l = strlen(entity->base.symbol->string);
4109         char   buf[l + sizeof(".%u")];
4110         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4111         ident     *const id = id_unique(buf);
4112
4113         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4114
4115         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4116                 set_entity_volatility(irentity, volatility_is_volatile);
4117         }
4118
4119         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4120         entity->variable.v.entity = irentity;
4121         set_entity_ld_ident(irentity, id);
4122         set_entity_variability(irentity, variability_uninitialized);
4123         set_entity_visibility(irentity, visibility_local);
4124         set_entity_allocation(irentity, entity->variable.thread_local ?
4125                 allocation_automatic : allocation_static);
4126
4127         ir_graph *const old_current_ir_graph = current_ir_graph;
4128         current_ir_graph = get_const_code_irg();
4129
4130         create_variable_initializer(entity);
4131
4132         assert(current_ir_graph == get_const_code_irg());
4133         current_ir_graph = old_current_ir_graph;
4134 }
4135
4136
4137
4138 static void return_statement_to_firm(return_statement_t *statement)
4139 {
4140         if (get_cur_block() == NULL)
4141                 return;
4142
4143         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4144         type_t   *type        = current_function_entity->declaration.type;
4145         ir_type  *func_irtype = get_ir_type(type);
4146
4147
4148         ir_node *in[1];
4149         int      in_len;
4150         if (get_method_n_ress(func_irtype) > 0) {
4151                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4152
4153                 if (statement->value != NULL) {
4154                         ir_node *node = expression_to_firm(statement->value);
4155                         node  = do_strict_conv(dbgi, node);
4156                         in[0] = node;
4157                 } else {
4158                         ir_mode *mode;
4159                         if (is_compound_type(res_type)) {
4160                                 mode = mode_P_data;
4161                         } else {
4162                                 mode = get_type_mode(res_type);
4163                         }
4164                         in[0] = new_Unknown(mode);
4165                 }
4166                 in_len = 1;
4167         } else {
4168                 /* build return_value for its side effects */
4169                 if (statement->value != NULL) {
4170                         expression_to_firm(statement->value);
4171                 }
4172                 in_len = 0;
4173         }
4174
4175         ir_node  *store = get_store();
4176         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4177
4178         ir_node *end_block = get_irg_end_block(current_ir_graph);
4179         add_immBlock_pred(end_block, ret);
4180
4181         set_cur_block(NULL);
4182 }
4183
4184 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4185 {
4186         if (get_cur_block() == NULL)
4187                 return NULL;
4188
4189         return expression_to_firm(statement->expression);
4190 }
4191
4192 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4193 {
4194         entity_t *entity = compound->scope.entities;
4195         for ( ; entity != NULL; entity = entity->base.next) {
4196                 if (!is_declaration(entity))
4197                         continue;
4198
4199                 create_local_declaration(entity);
4200         }
4201
4202         ir_node     *result    = NULL;
4203         statement_t *statement = compound->statements;
4204         for ( ; statement != NULL; statement = statement->base.next) {
4205                 if (statement->base.next == NULL
4206                                 && statement->kind == STATEMENT_EXPRESSION) {
4207                         result = expression_statement_to_firm(
4208                                         &statement->expression);
4209                         break;
4210                 }
4211                 statement_to_firm(statement);
4212         }
4213
4214         return result;
4215 }
4216
4217 static void create_global_variable(entity_t *entity)
4218 {
4219         assert(entity->kind == ENTITY_VARIABLE);
4220
4221         ir_visibility vis;
4222         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4223                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4224                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4225                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4226
4227                 default: panic("Invalid storage class for global variable");
4228         }
4229
4230         ir_type *var_type = entity->variable.thread_local ?
4231                 get_tls_type() : get_glob_type();
4232         create_variable_entity(entity,
4233                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4234         set_entity_visibility(entity->variable.v.entity, vis);
4235 }
4236
4237 static void create_local_declaration(entity_t *entity)
4238 {
4239         assert(is_declaration(entity));
4240
4241         /* construct type */
4242         (void) get_ir_type(entity->declaration.type);
4243         if (entity->base.symbol == NULL) {
4244                 return;
4245         }
4246
4247         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4248         case STORAGE_CLASS_STATIC:
4249                 create_local_static_variable(entity);
4250                 return;
4251         case STORAGE_CLASS_EXTERN:
4252                 if (entity->kind == ENTITY_FUNCTION) {
4253                         assert(entity->function.statement == NULL);
4254                         get_function_entity(entity);
4255                 } else {
4256                         create_global_variable(entity);
4257                         create_variable_initializer(entity);
4258                 }
4259                 return;
4260         case STORAGE_CLASS_NONE:
4261         case STORAGE_CLASS_AUTO:
4262         case STORAGE_CLASS_REGISTER:
4263                 if (entity->kind == ENTITY_FUNCTION) {
4264                         if (entity->function.statement != NULL) {
4265                                 get_function_entity(entity);
4266                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4267                                 enqueue_inner_function(entity);
4268                         } else {
4269                                 get_function_entity(entity);
4270                         }
4271                 } else {
4272                         create_local_variable(entity);
4273                 }
4274                 return;
4275         case STORAGE_CLASS_TYPEDEF:
4276                 break;
4277         }
4278         panic("invalid storage class found");
4279 }
4280
4281 static void initialize_local_declaration(entity_t *entity)
4282 {
4283         if (entity->base.symbol == NULL)
4284                 return;
4285
4286         switch ((declaration_kind_t) entity->declaration.kind) {
4287         case DECLARATION_KIND_LOCAL_VARIABLE:
4288         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4289                 create_variable_initializer(entity);
4290                 return;
4291
4292         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4293                 allocate_variable_length_array(entity);
4294                 return;
4295
4296         case DECLARATION_KIND_COMPOUND_MEMBER:
4297         case DECLARATION_KIND_GLOBAL_VARIABLE:
4298         case DECLARATION_KIND_FUNCTION:
4299         case DECLARATION_KIND_INNER_FUNCTION:
4300                 return;
4301
4302         case DECLARATION_KIND_PARAMETER:
4303         case DECLARATION_KIND_PARAMETER_ENTITY:
4304                 panic("can't initialize parameters");
4305
4306         case DECLARATION_KIND_UNKNOWN:
4307                 panic("can't initialize unknown declaration");
4308         }
4309         panic("invalid declaration kind");
4310 }
4311
4312 static void declaration_statement_to_firm(declaration_statement_t *statement)
4313 {
4314         entity_t *entity = statement->declarations_begin;
4315         entity_t *end    = statement->declarations_end->base.next;
4316         for ( ; entity != end; entity = entity->base.next) {
4317                 if (!is_declaration(entity))
4318                         continue;
4319                 initialize_local_declaration(entity);
4320         }
4321 }
4322
4323 static void if_statement_to_firm(if_statement_t *statement)
4324 {
4325         ir_node *cur_block = get_cur_block();
4326
4327         ir_node *fallthrough_block = NULL;
4328
4329         /* the true (blocks) */
4330         ir_node *true_block = NULL;
4331         if (statement->true_statement != NULL) {
4332                 true_block = new_immBlock();
4333                 statement_to_firm(statement->true_statement);
4334                 if (get_cur_block() != NULL) {
4335                         ir_node *jmp = new_Jmp();
4336                         if (fallthrough_block == NULL)
4337                                 fallthrough_block = new_immBlock();
4338                         add_immBlock_pred(fallthrough_block, jmp);
4339                 }
4340         }
4341
4342         /* the false (blocks) */
4343         ir_node *false_block = NULL;
4344         if (statement->false_statement != NULL) {
4345                 false_block = new_immBlock();
4346
4347                 statement_to_firm(statement->false_statement);
4348                 if (get_cur_block() != NULL) {
4349                         ir_node *jmp = new_Jmp();
4350                         if (fallthrough_block == NULL)
4351                                 fallthrough_block = new_immBlock();
4352                         add_immBlock_pred(fallthrough_block, jmp);
4353                 }
4354         }
4355
4356         /* create the condition */
4357         if (cur_block != NULL) {
4358                 if (true_block == NULL || false_block == NULL) {
4359                         if (fallthrough_block == NULL)
4360                                 fallthrough_block = new_immBlock();
4361                         if (true_block == NULL)
4362                                 true_block = fallthrough_block;
4363                         if (false_block == NULL)
4364                                 false_block = fallthrough_block;
4365                 }
4366
4367                 set_cur_block(cur_block);
4368                 create_condition_evaluation(statement->condition, true_block,
4369                                             false_block);
4370         }
4371
4372         mature_immBlock(true_block);
4373         if (false_block != fallthrough_block && false_block != NULL) {
4374                 mature_immBlock(false_block);
4375         }
4376         if (fallthrough_block != NULL) {
4377                 mature_immBlock(fallthrough_block);
4378         }
4379
4380         set_cur_block(fallthrough_block);
4381 }
4382
4383 static void while_statement_to_firm(while_statement_t *statement)
4384 {
4385         ir_node *jmp = NULL;
4386         if (get_cur_block() != NULL) {
4387                 jmp = new_Jmp();
4388         }
4389
4390         /* create the header block */
4391         ir_node *header_block = new_immBlock();
4392         if (jmp != NULL) {
4393                 add_immBlock_pred(header_block, jmp);
4394         }
4395
4396         /* the loop body */
4397         ir_node *old_continue_label = continue_label;
4398         ir_node *old_break_label    = break_label;
4399         continue_label              = header_block;
4400         break_label                 = NULL;
4401
4402         ir_node *body_block = new_immBlock();
4403         statement_to_firm(statement->body);
4404         ir_node *false_block = break_label;
4405
4406         assert(continue_label == header_block);
4407         continue_label = old_continue_label;
4408         break_label    = old_break_label;
4409
4410         if (get_cur_block() != NULL) {
4411                 jmp = new_Jmp();
4412                 add_immBlock_pred(header_block, jmp);
4413         }
4414
4415         /* shortcut for while(true) */
4416         if (is_constant_expression(statement->condition)
4417                         && fold_constant(statement->condition) != 0) {
4418                 set_cur_block(header_block);
4419                 ir_node *header_jmp = new_Jmp();
4420                 add_immBlock_pred(body_block, header_jmp);
4421
4422                 keep_alive(body_block);
4423                 keep_all_memory(body_block);
4424                 set_cur_block(body_block);
4425         } else {
4426                 if (false_block == NULL) {
4427                         false_block = new_immBlock();
4428                 }
4429
4430                 /* create the condition */
4431                 set_cur_block(header_block);
4432
4433                 create_condition_evaluation(statement->condition, body_block,
4434                                             false_block);
4435         }
4436
4437         mature_immBlock(body_block);
4438         mature_immBlock(header_block);
4439         if (false_block != NULL) {
4440                 mature_immBlock(false_block);
4441         }
4442
4443         set_cur_block(false_block);
4444 }
4445
4446 static void do_while_statement_to_firm(do_while_statement_t *statement)
4447 {
4448         ir_node *jmp = NULL;
4449         if (get_cur_block() != NULL) {
4450                 jmp = new_Jmp();
4451         }
4452
4453         /* create the header block */
4454         ir_node *header_block = new_immBlock();
4455
4456         /* the loop body */
4457         ir_node *body_block = new_immBlock();
4458         if (jmp != NULL) {
4459                 add_immBlock_pred(body_block, jmp);
4460         }
4461
4462         ir_node *old_continue_label = continue_label;
4463         ir_node *old_break_label    = break_label;
4464         continue_label              = header_block;
4465         break_label                 = NULL;
4466
4467         statement_to_firm(statement->body);
4468         ir_node *false_block = break_label;
4469
4470         assert(continue_label == header_block);
4471         continue_label = old_continue_label;
4472         break_label    = old_break_label;
4473
4474         if (get_cur_block() != NULL) {
4475                 ir_node *body_jmp = new_Jmp();
4476                 add_immBlock_pred(header_block, body_jmp);
4477                 mature_immBlock(header_block);
4478         }
4479
4480         if (false_block == NULL) {
4481                 false_block = new_immBlock();
4482         }
4483
4484         /* create the condition */
4485         set_cur_block(header_block);
4486
4487         create_condition_evaluation(statement->condition, body_block, false_block);
4488         mature_immBlock(body_block);
4489         mature_immBlock(header_block);
4490         if (false_block != NULL) {
4491                 mature_immBlock(false_block);
4492         }
4493
4494         set_cur_block(false_block);
4495 }
4496
4497 static void for_statement_to_firm(for_statement_t *statement)
4498 {
4499         ir_node *jmp = NULL;
4500
4501         /* create declarations */
4502         entity_t *entity = statement->scope.entities;
4503         for ( ; entity != NULL; entity = entity->base.next) {
4504                 if (!is_declaration(entity))
4505                         continue;
4506
4507                 create_local_declaration(entity);
4508         }
4509
4510         if (get_cur_block() != NULL) {
4511                 entity = statement->scope.entities;
4512                 for ( ; entity != NULL; entity = entity->base.next) {
4513                         if (!is_declaration(entity))
4514                                 continue;
4515
4516                         initialize_local_declaration(entity);
4517                 }
4518
4519                 if (statement->initialisation != NULL) {
4520                         expression_to_firm(statement->initialisation);
4521                 }
4522
4523                 jmp = new_Jmp();
4524         }
4525
4526
4527         /* create the step block */
4528         ir_node *const step_block = new_immBlock();
4529         if (statement->step != NULL) {
4530                 expression_to_firm(statement->step);
4531         }
4532         ir_node *const step_jmp = new_Jmp();
4533
4534         /* create the header block */
4535         ir_node *const header_block = new_immBlock();
4536         if (jmp != NULL) {
4537                 add_immBlock_pred(header_block, jmp);
4538         }
4539         add_immBlock_pred(header_block, step_jmp);
4540
4541         /* the false block */
4542         ir_node *const false_block = new_immBlock();
4543
4544         /* the loop body */
4545         ir_node * body_block;
4546         if (statement->body != NULL) {
4547                 ir_node *const old_continue_label = continue_label;
4548                 ir_node *const old_break_label    = break_label;
4549                 continue_label = step_block;
4550                 break_label    = false_block;
4551
4552                 body_block = new_immBlock();
4553                 statement_to_firm(statement->body);
4554
4555                 assert(continue_label == step_block);
4556                 assert(break_label    == false_block);
4557                 continue_label = old_continue_label;
4558                 break_label    = old_break_label;
4559
4560                 if (get_cur_block() != NULL) {
4561                         jmp = new_Jmp();
4562                         add_immBlock_pred(step_block, jmp);
4563                 }
4564         } else {
4565                 body_block = step_block;
4566         }
4567
4568         /* create the condition */
4569         set_cur_block(header_block);
4570         if (statement->condition != NULL) {
4571                 create_condition_evaluation(statement->condition, body_block,
4572                                             false_block);
4573         } else {
4574                 keep_alive(header_block);
4575                 keep_all_memory(header_block);
4576                 jmp = new_Jmp();
4577                 add_immBlock_pred(body_block, jmp);
4578         }
4579
4580         mature_immBlock(body_block);
4581         mature_immBlock(false_block);
4582         mature_immBlock(step_block);
4583         mature_immBlock(header_block);
4584         mature_immBlock(false_block);
4585
4586         set_cur_block(false_block);
4587 }
4588
4589 static void create_jump_statement(const statement_t *statement,
4590                                   ir_node *target_block)
4591 {
4592         if (get_cur_block() == NULL)
4593                 return;
4594
4595         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4596         ir_node  *jump = new_d_Jmp(dbgi);
4597         add_immBlock_pred(target_block, jump);
4598
4599         set_cur_block(NULL);
4600 }
4601
4602 static ir_node *get_break_label(void)
4603 {
4604         if (break_label == NULL) {
4605                 ir_node *cur_block = get_cur_block();
4606                 break_label = new_immBlock();
4607                 set_cur_block(cur_block);
4608         }
4609         return break_label;
4610 }
4611
4612 static void switch_statement_to_firm(switch_statement_t *statement)
4613 {
4614         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4615
4616         ir_node *expression  = expression_to_firm(statement->expression);
4617         ir_node *cond        = new_d_Cond(dbgi, expression);
4618
4619         set_cur_block(NULL);
4620
4621         ir_node *const old_switch_cond       = current_switch_cond;
4622         ir_node *const old_break_label       = break_label;
4623         const bool     old_saw_default_label = saw_default_label;
4624         saw_default_label                    = false;
4625         current_switch_cond                  = cond;
4626         break_label                          = NULL;
4627         switch_statement_t *const old_switch = current_switch;
4628         current_switch                       = statement;
4629
4630         /* determine a free number for the default label */
4631         unsigned long num_cases = 0;
4632         long def_nr = 0;
4633         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4634                 if (l->expression == NULL) {
4635                         /* default case */
4636                         continue;
4637                 }
4638                 if (l->last_case >= l->first_case)
4639                         num_cases += l->last_case - l->first_case + 1;
4640                 if (l->last_case > def_nr)
4641                         def_nr = l->last_case;
4642         }
4643
4644         if (def_nr == INT_MAX) {
4645                 /* Bad: an overflow will occurr, we cannot be sure that the
4646                  * maximum + 1 is a free number. Scan the values a second
4647                  * time to find a free number.
4648                  */
4649                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4650
4651                 memset(bits, 0, (num_cases + 7) >> 3);
4652                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4653                         if (l->expression == NULL) {
4654                                 /* default case */
4655                                 continue;
4656                         }
4657                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4658                         if (start < num_cases && l->last_case >= 0) {
4659                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4660                                         (unsigned long)l->last_case : num_cases - 1;
4661                                 for (unsigned long cns = start; cns <= end; ++cns) {
4662                                         bits[cns >> 3] |= (1 << (cns & 7));
4663                                 }
4664                         }
4665                 }
4666                 /* We look at the first num_cases constants:
4667                  * Either they are densed, so we took the last (num_cases)
4668                  * one, or they are non densed, so we will find one free
4669                  * there...
4670                  */
4671                 unsigned long i;
4672                 for (i = 0; i < num_cases; ++i)
4673                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4674                                 break;
4675
4676                 free(bits);
4677                 def_nr = i;
4678         } else {
4679                 ++def_nr;
4680         }
4681         statement->default_proj_nr = def_nr;
4682
4683         if (statement->body != NULL) {
4684                 statement_to_firm(statement->body);
4685         }
4686
4687         if (get_cur_block() != NULL) {
4688                 ir_node *jmp = new_Jmp();
4689                 add_immBlock_pred(get_break_label(), jmp);
4690         }
4691
4692         if (!saw_default_label) {
4693                 set_cur_block(get_nodes_block(cond));
4694                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4695                                                         statement->default_proj_nr);
4696                 add_immBlock_pred(get_break_label(), proj);
4697         }
4698
4699         if (break_label != NULL) {
4700                 mature_immBlock(break_label);
4701         }
4702         set_cur_block(break_label);
4703
4704         assert(current_switch_cond == cond);
4705         current_switch      = old_switch;
4706         current_switch_cond = old_switch_cond;
4707         break_label         = old_break_label;
4708         saw_default_label   = old_saw_default_label;
4709 }
4710
4711 static void case_label_to_firm(const case_label_statement_t *statement)
4712 {
4713         if (statement->is_empty_range)
4714                 return;
4715
4716         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4717
4718         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4719
4720         ir_node *proj;
4721         ir_node *old_block = get_nodes_block(current_switch_cond);
4722         ir_node *block     = new_immBlock();
4723
4724         set_cur_block(old_block);
4725         if (statement->expression != NULL) {
4726                 long pn     = statement->first_case;
4727                 long end_pn = statement->last_case;
4728                 assert(pn <= end_pn);
4729                 /* create jumps for all cases in the given range */
4730                 do {
4731                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4732                         add_immBlock_pred(block, proj);
4733                 } while(pn++ < end_pn);
4734         } else {
4735                 saw_default_label = true;
4736                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4737                                          current_switch->default_proj_nr);
4738
4739                 add_immBlock_pred(block, proj);
4740         }
4741
4742         if (fallthrough != NULL) {
4743                 add_immBlock_pred(block, fallthrough);
4744         }
4745         mature_immBlock(block);
4746         set_cur_block(block);
4747
4748         if (statement->statement != NULL) {
4749                 statement_to_firm(statement->statement);
4750         }
4751 }
4752
4753 static void label_to_firm(const label_statement_t *statement)
4754 {
4755         ir_node *block = get_label_block(statement->label);
4756
4757         if (get_cur_block() != NULL) {
4758                 ir_node *jmp = new_Jmp();
4759                 add_immBlock_pred(block, jmp);
4760         }
4761
4762         set_cur_block(block);
4763         keep_alive(block);
4764         keep_all_memory(block);
4765
4766         if (statement->statement != NULL) {
4767                 statement_to_firm(statement->statement);
4768         }
4769 }
4770
4771 static void goto_to_firm(const goto_statement_t *statement)
4772 {
4773         if (get_cur_block() == NULL)
4774                 return;
4775
4776         if (statement->expression) {
4777                 ir_node  *irn  = expression_to_firm(statement->expression);
4778                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4779                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4780
4781                 set_irn_link(ijmp, ijmp_list);
4782                 ijmp_list = ijmp;
4783         } else {
4784                 ir_node *block = get_label_block(statement->label);
4785                 ir_node *jmp   = new_Jmp();
4786                 add_immBlock_pred(block, jmp);
4787         }
4788         set_cur_block(NULL);
4789 }
4790
4791 static void asm_statement_to_firm(const asm_statement_t *statement)
4792 {
4793         bool needs_memory = false;
4794
4795         if (statement->is_volatile) {
4796                 needs_memory = true;
4797         }
4798
4799         size_t         n_clobbers = 0;
4800         asm_clobber_t *clobber    = statement->clobbers;
4801         for ( ; clobber != NULL; clobber = clobber->next) {
4802                 const char *clobber_str = clobber->clobber.begin;
4803
4804                 if (!be_is_valid_clobber(clobber_str)) {
4805                         errorf(&statement->base.source_position,
4806                                    "invalid clobber '%s' specified", clobber->clobber);
4807                         continue;
4808                 }
4809
4810                 if (strcmp(clobber_str, "memory") == 0) {
4811                         needs_memory = true;
4812                         continue;
4813                 }
4814
4815                 ident *id = new_id_from_str(clobber_str);
4816                 obstack_ptr_grow(&asm_obst, id);
4817                 ++n_clobbers;
4818         }
4819         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4820         ident **clobbers = NULL;
4821         if (n_clobbers > 0) {
4822                 clobbers = obstack_finish(&asm_obst);
4823         }
4824
4825         size_t n_inputs  = 0;
4826         asm_argument_t *argument = statement->inputs;
4827         for ( ; argument != NULL; argument = argument->next)
4828                 n_inputs++;
4829         size_t n_outputs = 0;
4830         argument = statement->outputs;
4831         for ( ; argument != NULL; argument = argument->next)
4832                 n_outputs++;
4833
4834         unsigned next_pos = 0;
4835
4836         ir_node *ins[n_inputs + n_outputs + 1];
4837         size_t   in_size = 0;
4838
4839         ir_asm_constraint tmp_in_constraints[n_outputs];
4840
4841         const expression_t *out_exprs[n_outputs];
4842         ir_node            *out_addrs[n_outputs];
4843         size_t              out_size = 0;
4844
4845         argument = statement->outputs;
4846         for ( ; argument != NULL; argument = argument->next) {
4847                 const char *constraints = argument->constraints.begin;
4848                 asm_constraint_flags_t asm_flags
4849                         = be_parse_asm_constraints(constraints);
4850
4851                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4852                         warningf(&statement->base.source_position,
4853                                "some constraints in '%s' are not supported", constraints);
4854                 }
4855                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4856                         errorf(&statement->base.source_position,
4857                                "some constraints in '%s' are invalid", constraints);
4858                         continue;
4859                 }
4860                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4861                         errorf(&statement->base.source_position,
4862                                "no write flag specified for output constraints '%s'",
4863                                constraints);
4864                         continue;
4865                 }
4866
4867                 unsigned pos = next_pos++;
4868                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4869                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4870                         expression_t *expr = argument->expression;
4871                         ir_node      *addr = expression_to_addr(expr);
4872                         /* in+output, construct an artifical same_as constraint on the
4873                          * input */
4874                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4875                                 char     buf[64];
4876                                 ir_node *value = get_value_from_lvalue(expr, addr);
4877
4878                                 snprintf(buf, sizeof(buf), "%u", pos);
4879
4880                                 ir_asm_constraint constraint;
4881                                 constraint.pos              = pos;
4882                                 constraint.constraint       = new_id_from_str(buf);
4883                                 constraint.mode             = get_ir_mode(expr->base.type);
4884                                 tmp_in_constraints[in_size] = constraint;
4885                                 ins[in_size] = value;
4886
4887                                 ++in_size;
4888                         }
4889
4890                         out_exprs[out_size] = expr;
4891                         out_addrs[out_size] = addr;
4892                         ++out_size;
4893                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4894                         /* pure memory ops need no input (but we have to make sure we
4895                          * attach to the memory) */
4896                         assert(! (asm_flags &
4897                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4898                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4899                         needs_memory = true;
4900
4901                         /* we need to attach the address to the inputs */
4902                         expression_t *expr = argument->expression;
4903
4904                         ir_asm_constraint constraint;
4905                         constraint.pos              = pos;
4906                         constraint.constraint       = new_id_from_str(constraints);
4907                         constraint.mode             = NULL;
4908                         tmp_in_constraints[in_size] = constraint;
4909
4910                         ins[in_size]          = expression_to_addr(expr);
4911                         ++in_size;
4912                         continue;
4913                 } else {
4914                         errorf(&statement->base.source_position,
4915                                "only modifiers but no place set in constraints '%s'",
4916                                constraints);
4917                         continue;
4918                 }
4919
4920                 ir_asm_constraint constraint;
4921                 constraint.pos        = pos;
4922                 constraint.constraint = new_id_from_str(constraints);
4923                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4924
4925                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4926         }
4927         assert(obstack_object_size(&asm_obst)
4928                         == out_size * sizeof(ir_asm_constraint));
4929         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4930
4931
4932         obstack_grow(&asm_obst, tmp_in_constraints,
4933                      in_size * sizeof(tmp_in_constraints[0]));
4934         /* find and count input and output arguments */
4935         argument = statement->inputs;
4936         for ( ; argument != NULL; argument = argument->next) {
4937                 const char *constraints = argument->constraints.begin;
4938                 asm_constraint_flags_t asm_flags
4939                         = be_parse_asm_constraints(constraints);
4940
4941                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4942                         errorf(&statement->base.source_position,
4943                                "some constraints in '%s' are not supported", constraints);
4944                         continue;
4945                 }
4946                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4947                         errorf(&statement->base.source_position,
4948                                "some constraints in '%s' are invalid", constraints);
4949                         continue;
4950                 }
4951                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4952                         errorf(&statement->base.source_position,
4953                                "write flag specified for input constraints '%s'",
4954                                constraints);
4955                         continue;
4956                 }
4957
4958                 ir_node *input;
4959                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4960                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4961                         /* we can treat this as "normal" input */
4962                         input = expression_to_firm(argument->expression);
4963                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4964                         /* pure memory ops need no input (but we have to make sure we
4965                          * attach to the memory) */
4966                         assert(! (asm_flags &
4967                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4968                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4969                         needs_memory = true;
4970                         input = expression_to_addr(argument->expression);
4971                 } else {
4972                         errorf(&statement->base.source_position,
4973                                "only modifiers but no place set in constraints '%s'",
4974                                constraints);
4975                         continue;
4976                 }
4977
4978                 ir_asm_constraint constraint;
4979                 constraint.pos        = next_pos++;
4980                 constraint.constraint = new_id_from_str(constraints);
4981                 constraint.mode       = get_irn_mode(input);
4982
4983                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4984                 ins[in_size++] = input;
4985         }
4986
4987         if (needs_memory) {
4988                 ir_asm_constraint constraint;
4989                 constraint.pos        = next_pos++;
4990                 constraint.constraint = new_id_from_str("");
4991                 constraint.mode       = mode_M;
4992
4993                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4994                 ins[in_size++] = get_store();
4995         }
4996
4997         assert(obstack_object_size(&asm_obst)
4998                         == in_size * sizeof(ir_asm_constraint));
4999         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5000
5001         /* create asm node */
5002         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5003
5004         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5005
5006         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5007                                   out_size, output_constraints,
5008                                   n_clobbers, clobbers, asm_text);
5009
5010         if (statement->is_volatile) {
5011                 set_irn_pinned(node, op_pin_state_pinned);
5012         } else {
5013                 set_irn_pinned(node, op_pin_state_floats);
5014         }
5015
5016         /* create output projs & connect them */
5017         if (needs_memory) {
5018                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5019                 set_store(projm);
5020         }
5021
5022         size_t i;
5023         for (i = 0; i < out_size; ++i) {
5024                 const expression_t *out_expr = out_exprs[i];
5025                 long                pn       = i;
5026                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
5027                 ir_node            *proj     = new_Proj(node, mode, pn);
5028                 ir_node            *addr     = out_addrs[i];
5029
5030                 set_value_for_expression_addr(out_expr, proj, addr);
5031         }
5032 }
5033
5034 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
5035         statement_to_firm(statement->try_statement);
5036         warningf(&statement->base.source_position, "structured exception handling ignored");
5037 }
5038
5039 static void     leave_statement_to_firm(leave_statement_t *statement) {
5040         errorf(&statement->base.source_position, "__leave not supported yet");
5041 }
5042
5043 /**
5044  * Transform a statement.
5045  */
5046 static void statement_to_firm(statement_t *statement)
5047 {
5048 #ifndef NDEBUG
5049         assert(!statement->base.transformed);
5050         statement->base.transformed = true;
5051 #endif
5052
5053         switch (statement->kind) {
5054         case STATEMENT_INVALID:
5055                 panic("invalid statement found");
5056         case STATEMENT_EMPTY:
5057                 /* nothing */
5058                 return;
5059         case STATEMENT_COMPOUND:
5060                 compound_statement_to_firm(&statement->compound);
5061                 return;
5062         case STATEMENT_RETURN:
5063                 return_statement_to_firm(&statement->returns);
5064                 return;
5065         case STATEMENT_EXPRESSION:
5066                 expression_statement_to_firm(&statement->expression);
5067                 return;
5068         case STATEMENT_IF:
5069                 if_statement_to_firm(&statement->ifs);
5070                 return;
5071         case STATEMENT_WHILE:
5072                 while_statement_to_firm(&statement->whiles);
5073                 return;
5074         case STATEMENT_DO_WHILE:
5075                 do_while_statement_to_firm(&statement->do_while);
5076                 return;
5077         case STATEMENT_DECLARATION:
5078                 declaration_statement_to_firm(&statement->declaration);
5079                 return;
5080         case STATEMENT_BREAK:
5081                 create_jump_statement(statement, get_break_label());
5082                 return;
5083         case STATEMENT_CONTINUE:
5084                 create_jump_statement(statement, continue_label);
5085                 return;
5086         case STATEMENT_SWITCH:
5087                 switch_statement_to_firm(&statement->switchs);
5088                 return;
5089         case STATEMENT_CASE_LABEL:
5090                 case_label_to_firm(&statement->case_label);
5091                 return;
5092         case STATEMENT_FOR:
5093                 for_statement_to_firm(&statement->fors);
5094                 return;
5095         case STATEMENT_LABEL:
5096                 label_to_firm(&statement->label);
5097                 return;
5098         case STATEMENT_LOCAL_LABEL:
5099                 /* local labels transform the semantics of labels while parsing
5100                  * they don't need any special treatment here */
5101                 return;
5102         case STATEMENT_GOTO:
5103                 goto_to_firm(&statement->gotos);
5104                 return;
5105         case STATEMENT_ASM:
5106                 asm_statement_to_firm(&statement->asms);
5107                 return;
5108         case STATEMENT_MS_TRY:
5109                 ms_try_statement_to_firm(&statement->ms_try);
5110                 return;
5111         case STATEMENT_LEAVE:
5112                 leave_statement_to_firm(&statement->leave);
5113                 return;
5114         }
5115         panic("Statement not implemented\n");
5116 }
5117
5118 static int count_local_variables(const entity_t *entity,
5119                                  const entity_t *const end)
5120 {
5121         int count = 0;
5122         for (; entity != end; entity = entity->base.next) {
5123                 type_t *type;
5124                 bool    address_taken;
5125
5126                 if (entity->kind == ENTITY_VARIABLE) {
5127                         type          = skip_typeref(entity->declaration.type);
5128                         address_taken = entity->variable.address_taken;
5129                 } else if (entity->kind == ENTITY_PARAMETER) {
5130                         type          = skip_typeref(entity->declaration.type);
5131                         address_taken = entity->parameter.address_taken;
5132                 } else {
5133                         continue;
5134                 }
5135
5136                 if (!address_taken && is_type_scalar(type))
5137                         ++count;
5138         }
5139         return count;
5140 }
5141
5142 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5143 {
5144         int *const count = env;
5145
5146         switch (stmt->kind) {
5147         case STATEMENT_DECLARATION: {
5148                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5149                 *count += count_local_variables(decl_stmt->declarations_begin,
5150                                                                                 decl_stmt->declarations_end->base.next);
5151                 break;
5152         }
5153
5154         case STATEMENT_FOR:
5155                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5156                 break;
5157
5158         default:
5159                 break;
5160         }
5161 }
5162
5163 static int get_function_n_local_vars(entity_t *entity)
5164 {
5165         int count = 0;
5166
5167         /* count parameters */
5168         count += count_local_variables(entity->function.parameters.entities, NULL);
5169
5170         /* count local variables declared in body */
5171         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5172                         &count);
5173         return count;
5174 }
5175
5176 static void initialize_function_parameters(entity_t *entity)
5177 {
5178         assert(entity->kind == ENTITY_FUNCTION);
5179         ir_graph *irg             = current_ir_graph;
5180         ir_node  *args            = get_irg_args(irg);
5181         ir_node  *start_block     = get_irg_start_block(irg);
5182         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5183
5184         int       n         = 0;
5185         entity_t *parameter = entity->function.parameters.entities;
5186         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5187                 assert(parameter->kind == ENTITY_PARAMETER);
5188                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5189                 type_t *type = skip_typeref(parameter->declaration.type);
5190
5191                 bool needs_entity = parameter->parameter.address_taken;
5192                 assert(!is_type_array(type));
5193                 if (is_type_compound(type)) {
5194                         needs_entity = true;
5195                 }
5196
5197                 if (needs_entity) {
5198                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5199                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5200                         set_entity_ident(entity, id);
5201
5202                         parameter->declaration.kind
5203                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5204                         parameter->parameter.v.entity = entity;
5205                         continue;
5206                 }
5207
5208                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5209                 ir_mode *param_mode   = get_type_mode(param_irtype);
5210
5211                 long     pn    = n;
5212                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5213
5214                 ir_mode *mode = get_ir_mode(type);
5215                 value = create_conv(NULL, value, mode);
5216                 value = do_strict_conv(NULL, value);
5217
5218                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5219                 parameter->parameter.v.value_number = next_value_number_function;
5220                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5221                                         parameter);
5222                 ++next_value_number_function;
5223
5224                 set_value(parameter->parameter.v.value_number, value);
5225         }
5226 }
5227
5228 /**
5229  * Handle additional decl modifiers for IR-graphs
5230  *
5231  * @param irg            the IR-graph
5232  * @param dec_modifiers  additional modifiers
5233  */
5234 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5235 {
5236         if (decl_modifiers & DM_NORETURN) {
5237                 /* TRUE if the declaration includes the Microsoft
5238                    __declspec(noreturn) specifier. */
5239                 set_irg_additional_property(irg, mtp_property_noreturn);
5240         }
5241         if (decl_modifiers & DM_NOTHROW) {
5242                 /* TRUE if the declaration includes the Microsoft
5243                    __declspec(nothrow) specifier. */
5244                 set_irg_additional_property(irg, mtp_property_nothrow);
5245         }
5246         if (decl_modifiers & DM_NAKED) {
5247                 /* TRUE if the declaration includes the Microsoft
5248                    __declspec(naked) specifier. */
5249                 set_irg_additional_property(irg, mtp_property_naked);
5250         }
5251         if (decl_modifiers & DM_FORCEINLINE) {
5252                 /* TRUE if the declaration includes the
5253                    Microsoft __forceinline specifier. */
5254                 set_irg_inline_property(irg, irg_inline_forced);
5255         }
5256         if (decl_modifiers & DM_NOINLINE) {
5257                 /* TRUE if the declaration includes the Microsoft
5258                    __declspec(noinline) specifier. */
5259                 set_irg_inline_property(irg, irg_inline_forbidden);
5260         }
5261 }
5262
5263 static void add_function_pointer(ir_type *segment, ir_entity *method,
5264                                  const char *unique_template)
5265 {
5266         ir_type   *method_type  = get_entity_type(method);
5267         ident     *id           = id_unique(unique_template);
5268         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5269
5270         ident     *ide          = id_unique(unique_template);
5271         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5272         ir_graph  *irg          = get_const_code_irg();
5273         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5274                                                            method, NULL);
5275
5276         set_entity_compiler_generated(ptr, 1);
5277         set_entity_variability(ptr, variability_constant);
5278         set_atomic_ent_value(ptr, val);
5279 }
5280
5281 /**
5282  * Generate possible IJmp branches to a given label block.
5283  */
5284 static void gen_ijmp_branches(ir_node *block) {
5285         ir_node *ijmp;
5286         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5287                 add_immBlock_pred(block, ijmp);
5288         }
5289 }
5290
5291 /**
5292  * Create code for a function.
5293  */
5294 static void create_function(entity_t *entity)
5295 {
5296         assert(entity->kind == ENTITY_FUNCTION);
5297         ir_entity *function_entity = get_function_entity(entity);
5298
5299         if (entity->function.statement == NULL)
5300                 return;
5301
5302         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5303                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5304                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5305         }
5306         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5307                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5308                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5309         }
5310
5311         current_function_entity = entity;
5312         current_function_name   = NULL;
5313         current_funcsig         = NULL;
5314
5315         assert(all_labels == NULL);
5316         all_labels = NEW_ARR_F(label_t *, 0);
5317         ijmp_list  = NULL;
5318
5319         int       n_local_vars = get_function_n_local_vars(entity);
5320         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5321
5322         ir_graph *old_current_function = current_function;
5323         current_function = irg;
5324
5325         set_irg_fp_model(irg, firm_opt.fp_model);
5326         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5327         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5328
5329         ir_node *first_block = get_cur_block();
5330
5331         /* set inline flags */
5332         if (entity->function.is_inline)
5333                 set_irg_inline_property(irg, irg_inline_recomended);
5334         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5335
5336         next_value_number_function = 0;
5337         initialize_function_parameters(entity);
5338
5339         statement_to_firm(entity->function.statement);
5340
5341         ir_node *end_block = get_irg_end_block(irg);
5342
5343         /* do we have a return statement yet? */
5344         if (get_cur_block() != NULL) {
5345                 type_t *type = skip_typeref(entity->declaration.type);
5346                 assert(is_type_function(type));
5347                 const function_type_t *func_type   = &type->function;
5348                 const type_t          *return_type
5349                         = skip_typeref(func_type->return_type);
5350
5351                 ir_node *ret;
5352                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5353                         ret = new_Return(get_store(), 0, NULL);
5354                 } else {
5355                         ir_mode *mode;
5356                         if (is_type_scalar(return_type)) {
5357                                 mode = get_ir_mode(func_type->return_type);
5358                         } else {
5359                                 mode = mode_P_data;
5360                         }
5361
5362                         ir_node *in[1];
5363                         /* §5.1.2.2.3 main implicitly returns 0 */
5364                         if (is_main(entity)) {
5365                                 in[0] = new_Const(get_mode_null(mode));
5366                         } else {
5367                                 in[0] = new_Unknown(mode);
5368                         }
5369                         ret = new_Return(get_store(), 1, in);
5370                 }
5371                 add_immBlock_pred(end_block, ret);
5372         }
5373
5374         bool has_computed_gotos = false;
5375         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5376                 label_t *label = all_labels[i];
5377                 if (label->address_taken) {
5378                         gen_ijmp_branches(label->block);
5379                         has_computed_gotos = true;
5380                 }
5381                 mature_immBlock(label->block);
5382         }
5383         if (has_computed_gotos) {
5384                 /* if we have computed goto's in the function, we cannot inline it */
5385                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5386                         warningf(&entity->base.source_position,
5387                                  "function '%Y' can never be inlined because it contains a computed goto",
5388                                  entity->base.symbol);
5389                 }
5390                 set_irg_inline_property(irg, irg_inline_forbidden);
5391         }
5392
5393         DEL_ARR_F(all_labels);
5394         all_labels = NULL;
5395
5396         mature_immBlock(first_block);
5397         mature_immBlock(end_block);
5398
5399         irg_finalize_cons(irg);
5400
5401         /* finalize the frame type */
5402         ir_type *frame_type = get_irg_frame_type(irg);
5403         int      n          = get_compound_n_members(frame_type);
5404         int      align_all  = 4;
5405         int      offset     = 0;
5406         for (int i = 0; i < n; ++i) {
5407                 ir_entity *entity      = get_compound_member(frame_type, i);
5408                 ir_type   *entity_type = get_entity_type(entity);
5409
5410                 int align = get_type_alignment_bytes(entity_type);
5411                 if (align > align_all)
5412                         align_all = align;
5413                 int misalign = 0;
5414                 if (align > 0) {
5415                         misalign  = offset % align;
5416                         if (misalign > 0) {
5417                                 offset += align - misalign;
5418                         }
5419                 }
5420
5421                 set_entity_offset(entity, offset);
5422                 offset += get_type_size_bytes(entity_type);
5423         }
5424         set_type_size_bytes(frame_type, offset);
5425         set_type_alignment_bytes(frame_type, align_all);
5426
5427         irg_vrfy(irg);
5428         current_function = old_current_function;
5429
5430         /* create inner functions */
5431         entity_t *inner;
5432         for (inner = next_inner_function(); inner != NULL;
5433              inner = next_inner_function()) {
5434                 create_function(inner);
5435         }
5436 }
5437
5438 static void scope_to_firm(scope_t *scope)
5439 {
5440         /* first pass: create declarations */
5441         entity_t *entity = scope->entities;
5442         for ( ; entity != NULL; entity = entity->base.next) {
5443                 if (entity->base.symbol == NULL)
5444                         continue;
5445
5446                 if (entity->kind == ENTITY_FUNCTION) {
5447                         get_function_entity(entity);
5448                 } else if (entity->kind == ENTITY_VARIABLE) {
5449                         create_global_variable(entity);
5450                 }
5451         }
5452
5453         /* second pass: create code/initializers */
5454         entity = scope->entities;
5455         for ( ; entity != NULL; entity = entity->base.next) {
5456                 if (entity->base.symbol == NULL)
5457                         continue;
5458
5459                 if (entity->kind == ENTITY_FUNCTION) {
5460                         create_function(entity);
5461                 } else if (entity->kind == ENTITY_VARIABLE) {
5462                         assert(entity->declaration.kind
5463                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5464                         current_ir_graph = get_const_code_irg();
5465                         create_variable_initializer(entity);
5466                 }
5467         }
5468 }
5469
5470 void init_ast2firm(void)
5471 {
5472         obstack_init(&asm_obst);
5473         init_atomic_modes();
5474
5475         /* OS option must be set to the backend */
5476         switch (firm_opt.os_support) {
5477         case OS_SUPPORT_MINGW:
5478                 create_ld_ident = create_name_win32;
5479                 break;
5480         case OS_SUPPORT_LINUX:
5481                 create_ld_ident = create_name_linux_elf;
5482                 break;
5483         case OS_SUPPORT_MACHO:
5484                 create_ld_ident = create_name_macho;
5485                 break;
5486         default:
5487                 panic("unexpected OS support mode");
5488         }
5489
5490         /* create idents for all known runtime functions */
5491         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5492                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5493         }
5494
5495         entitymap_init(&entitymap);
5496 }
5497
5498 static void init_ir_types(void)
5499 {
5500         static int ir_types_initialized = 0;
5501         if (ir_types_initialized)
5502                 return;
5503         ir_types_initialized = 1;
5504
5505         ir_type_int        = get_ir_type(type_int);
5506         ir_type_const_char = get_ir_type(type_const_char);
5507         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5508         ir_type_void       = get_ir_type(type_void);
5509 }
5510
5511 void exit_ast2firm(void)
5512 {
5513         entitymap_destroy(&entitymap);
5514         obstack_free(&asm_obst, NULL);
5515 }
5516
5517 static void global_asm_to_firm(statement_t *s)
5518 {
5519         for (; s != NULL; s = s->base.next) {
5520                 assert(s->kind == STATEMENT_ASM);
5521
5522                 char const *const text = s->asms.asm_text.begin;
5523                 size_t            size = s->asms.asm_text.size;
5524
5525                 /* skip the last \0 */
5526                 if (text[size - 1] == '\0')
5527                         --size;
5528
5529                 ident *const id = new_id_from_chars(text, size);
5530                 add_irp_asm(id);
5531         }
5532 }
5533
5534 void translation_unit_to_firm(translation_unit_t *unit)
5535 {
5536         /* just to be sure */
5537         continue_label           = NULL;
5538         break_label              = NULL;
5539         current_switch_cond      = NULL;
5540         current_translation_unit = unit;
5541
5542         init_ir_types();
5543         inner_functions = NEW_ARR_F(entity_t *, 0);
5544
5545         scope_to_firm(&unit->scope);
5546         global_asm_to_firm(unit->global_asm);
5547
5548         DEL_ARR_F(inner_functions);
5549         inner_functions  = NULL;
5550
5551         current_ir_graph         = NULL;
5552         current_translation_unit = NULL;
5553 }