nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "adt/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "entitymap_t.h"
  50 #include "driver/firm_opt.h"
  51 #include "driver/firm_cmdline.h"
  52
  53 static ir_type *ir_type_const_char;
  54 static ir_type *ir_type_wchar_t;
  55 static ir_type *ir_type_void;
  56 static ir_type *ir_type_int;
  57
  58 /* architecture specific floating point arithmetic mode (if any) */
  59 static ir_mode *mode_float_arithmetic;
  60
  61 static int        next_value_number_function;
  62 static ir_node   *continue_label;
  63 static ir_node   *break_label;
  64 static ir_node   *current_switch_cond;
  65 static bool       saw_default_label;
  66 static label_t  **all_labels;
  67 static entity_t **inner_functions;
  68 static ir_node   *ijmp_list;
  69 static bool       constant_folding;
  70
  71 extern bool       have_const_functions;
  72
  73 static const entity_t     *current_function_entity;
  74 static ir_node            *current_function_name;
  75 static ir_node            *current_funcsig;
  76 static switch_statement_t *current_switch;
  77 static ir_graph           *current_function;
  78 static translation_unit_t *current_translation_unit;
  79
  80 static entitymap_t  entitymap;
  81
  82 static struct obstack asm_obst;
  83
  84 typedef enum declaration_kind_t {
  85         DECLARATION_KIND_UNKNOWN,
  86         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  87         DECLARATION_KIND_GLOBAL_VARIABLE,
  88         DECLARATION_KIND_LOCAL_VARIABLE,
  89         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  90         DECLARATION_KIND_PARAMETER,
  91         DECLARATION_KIND_PARAMETER_ENTITY,
  92         DECLARATION_KIND_FUNCTION,
  93         DECLARATION_KIND_COMPOUND_MEMBER,
  94         DECLARATION_KIND_INNER_FUNCTION
  95 } declaration_kind_t;
  96
  97 static ir_mode *get_ir_mode_storage(type_t *type);
  98 /*
  99  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 100  * int that it returns bigger modes for floating point on some platforms
 101  * (x87 internally does arithemtic with 80bits)
 102  */
 103 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 104
 105 static ir_type *get_ir_type_incomplete(type_t *type);
 106
 107 static void enqueue_inner_function(entity_t *entity)
 108 {
 109         ARR_APP1(entity_t*, inner_functions, entity);
 110 }
 111
 112 static entity_t *next_inner_function(void)
 113 {
 114         int len = ARR_LEN(inner_functions);
 115         if (len == 0)
 116                 return NULL;
 117
 118         entity_t *entity = inner_functions[len-1];
 119         ARR_SHRINKLEN(inner_functions, len-1);
 120
 121         return entity;
 122 }
 123
 124 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 125 {
 126         const entity_t *entity = get_irg_loc_description(irg, pos);
 127
 128         if (entity != NULL) {
 129                 warningf(&entity->base.source_position,
 130                          "%s '%#T' might be used uninitialized",
 131                          get_entity_kind_name(entity->kind),
 132                          entity->declaration.type, entity->base.symbol);
 133         }
 134         return new_r_Unknown(irg, mode);
 135 }
 136
 137 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 138 {
 139         const source_position_t *pos = (const source_position_t*) dbg;
 140         if (pos == NULL)
 141                 return 0;
 142         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 143                                    pos->linenr);
 144 }
 145
 146 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 147 {
 148         const source_position_t *pos = (const source_position_t*) dbg;
 149         if (pos == NULL)
 150                 return NULL;
 151         if (line != NULL)
 152                 *line = pos->linenr;
 153         return pos->input_name;
 154 }
 155
 156 static dbg_info *get_dbg_info(const source_position_t *pos)
 157 {
 158         return (dbg_info*) pos;
 159 }
 160
 161 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 162
 163 static ir_mode *mode_int, *mode_uint;
 164
 165 static ir_node *_expression_to_firm(const expression_t *expression);
 166 static ir_node *expression_to_firm(const expression_t *expression);
 167 static void create_local_declaration(entity_t *entity);
 168
 169 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 170 {
 171         unsigned flags = get_atomic_type_flags(kind);
 172         unsigned size  = get_atomic_type_size(kind);
 173         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 174                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 175                 char            name[64];
 176                 ir_mode_sort    sort;
 177                 unsigned        bit_size     = size * 8;
 178                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 179                 unsigned        modulo_shift;
 180                 ir_mode_arithmetic arithmetic;
 181
 182                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 183                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 184                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 185                                  bit_size);
 186                         sort         = irms_int_number;
 187                         arithmetic   = irma_twos_complement;
 188                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 189                 } else {
 190                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 191                         snprintf(name, sizeof(name), "F%u", bit_size);
 192                         sort         = irms_float_number;
 193                         arithmetic   = irma_ieee754;
 194                         modulo_shift = 0;
 195                 }
 196                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 197                                    modulo_shift);
 198         }
 199
 200         return NULL;
 201 }
 202
 203 /**
 204  * Initialises the atomic modes depending on the machine size.
 205  */
 206 static void init_atomic_modes(void)
 207 {
 208         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 209                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 210         }
 211         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 212         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 213
 214         /* there's no real void type in firm */
 215         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 216
 217         /* initialize pointer modes */
 218         char            name[64];
 219         ir_mode_sort    sort         = irms_reference;
 220         unsigned        bit_size     = machine_size;
 221         bool            is_signed    = 0;
 222         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 223         unsigned        modulo_shift
 224                 = bit_size < machine_size ? machine_size : bit_size;
 225
 226         snprintf(name, sizeof(name), "p%u", machine_size);
 227         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 228                                         modulo_shift);
 229
 230         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 231         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 232
 233         /* Hmm, pointers should be machine size */
 234         set_modeP_data(ptr_mode);
 235         set_modeP_code(ptr_mode);
 236 }
 237
 238 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 239 {
 240         assert(kind <= ATOMIC_TYPE_LAST);
 241         return atomic_modes[kind];
 242 }
 243
 244 static ir_node *get_vla_size(array_type_t *const type)
 245 {
 246         ir_node *size_node = type->size_node;
 247         if (size_node == NULL) {
 248                 size_node = expression_to_firm(type->size_expression);
 249                 type->size_node = size_node;
 250         }
 251         return size_node;
 252 }
 253
 254 static ir_node *get_type_size(type_t *type)
 255 {
 256         type = skip_typeref(type);
 257
 258         if (is_type_array(type) && type->array.is_vla) {
 259                 ir_node *size_node = get_vla_size(&type->array);
 260                 ir_node *elem_size = get_type_size(type->array.element_type);
 261                 ir_mode *mode      = get_irn_mode(size_node);
 262                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 263                 return real_size;
 264         }
 265
 266         ir_mode *mode = get_ir_mode_storage(type_size_t);
 267         symconst_symbol sym;
 268         sym.type_p = get_ir_type(type);
 269         return new_SymConst(mode, sym, symconst_type_size);
 270 }
 271
 272 static unsigned count_parameters(const function_type_t *function_type)
 273 {
 274         unsigned count = 0;
 275
 276         function_parameter_t *parameter = function_type->parameters;
 277         for ( ; parameter != NULL; parameter = parameter->next) {
 278                 ++count;
 279         }
 280
 281         return count;
 282 }
 283
 284 static type_t *get_aligned_type(type_t *type, int alignment)
 285 {
 286         if (alignment == 0)
 287                 return type;
 288
 289         type = skip_typeref(type);
 290         if (alignment > type->base.alignment) {
 291                 type_t *copy         = duplicate_type(type);
 292                 copy->base.alignment = alignment;
 293                 type                 = identify_new_type(copy);
 294         }
 295         return type;
 296 }
 297
 298 /**
 299  * Creates a Firm type for an atomic type
 300  */
 301 static ir_type *create_atomic_type(atomic_type_kind_t akind, int alignment)
 302 {
 303         ir_mode            *mode   = atomic_modes[akind];
 304         ident              *id     = get_mode_ident(mode);
 305         ir_type            *irtype = new_type_primitive(id, mode);
 306
 307         set_type_alignment_bytes(irtype, alignment);
 308
 309         return irtype;
 310 }
 311
 312 /**
 313  * Creates a Firm type for a complex type
 314  */
 315 static ir_type *create_complex_type(const complex_type_t *type)
 316 {
 317         atomic_type_kind_t  kind = type->akind;
 318         ir_mode            *mode = atomic_modes[kind];
 319         ident              *id   = get_mode_ident(mode);
 320
 321         (void) id;
 322
 323         /* FIXME: finish the array */
 324         return NULL;
 325 }
 326
 327 /**
 328  * Creates a Firm type for an imaginary type
 329  */
 330 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 331 {
 332         atomic_type_kind_t  kind      = type->akind;
 333         ir_mode            *mode      = atomic_modes[kind];
 334         ident              *id        = get_mode_ident(mode);
 335         ir_type            *irtype    = new_type_primitive(id, mode);
 336
 337         set_type_alignment_bytes(irtype, type->base.alignment);
 338
 339         return irtype;
 340 }
 341
 342 /**
 343  * return type of a parameter (and take transparent union gnu extension into
 344  * account)
 345  */
 346 static type_t *get_parameter_type(type_t *type)
 347 {
 348         type = skip_typeref(type);
 349         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 350                 compound_t *compound = type->compound.compound;
 351                 type                 = compound->members.entities->declaration.type;
 352         }
 353
 354         return type;
 355 }
 356
 357 static ir_type *create_method_type(const function_type_t *function_type)
 358 {
 359         type_t  *return_type  = skip_typeref(function_type->return_type);
 360
 361         ident   *id           = id_unique("functiontype.%u");
 362         int      n_parameters = count_parameters(function_type);
 363         int      n_results    = return_type == type_void ? 0 : 1;
 364         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 365
 366         if (return_type != type_void) {
 367                 ir_type *restype = get_ir_type(return_type);
 368                 set_method_res_type(irtype, 0, restype);
 369         }
 370
 371         function_parameter_t *parameter = function_type->parameters;
 372         int                   n         = 0;
 373         for ( ; parameter != NULL; parameter = parameter->next) {
 374                 type_t  *type     = get_parameter_type(parameter->type);
 375                 ir_type *p_irtype = get_ir_type(type);
 376                 set_method_param_type(irtype, n, p_irtype);
 377                 ++n;
 378         }
 379
 380         if (function_type->variadic || function_type->unspecified_parameters) {
 381                 set_method_variadicity(irtype, variadicity_variadic);
 382         }
 383
 384         unsigned cc = get_method_calling_convention(irtype);
 385         switch (function_type->calling_convention) {
 386         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 387         case CC_CDECL:
 388 is_cdecl:
 389                 set_method_calling_convention(irtype, SET_CDECL(cc));
 390                 break;
 391
 392         case CC_STDCALL:
 393                 if (function_type->variadic || function_type->unspecified_parameters)
 394                         goto is_cdecl;
 395
 396                 /* only non-variadic function can use stdcall, else use cdecl */
 397                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 398                 break;
 399
 400         case CC_FASTCALL:
 401                 if (function_type->variadic || function_type->unspecified_parameters)
 402                         goto is_cdecl;
 403                 /* only non-variadic function can use fastcall, else use cdecl */
 404                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 405                 break;
 406
 407         case CC_THISCALL:
 408                 /* Hmm, leave default, not accepted by the parser yet. */
 409                 break;
 410         }
 411
 412         return irtype;
 413 }
 414
 415 static ir_type *create_pointer_type(pointer_type_t *type)
 416 {
 417         type_t   *points_to    = type->points_to;
 418         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 419         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 420                                                   ir_points_to, mode_P_data);
 421
 422         return ir_type;
 423 }
 424
 425 static ir_type *create_reference_type(reference_type_t *type)
 426 {
 427         type_t  *refers_to    = type->refers_to;
 428         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 429         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 430                                                  ir_refers_to, mode_P_data);
 431
 432         return ir_type;
 433 }
 434
 435 static ir_type *create_array_type(array_type_t *type)
 436 {
 437         type_t  *element_type    = type->element_type;
 438         ir_type *ir_element_type = get_ir_type(element_type);
 439
 440         ident    *id      = id_unique("array.%u");
 441         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 442
 443         const int align = get_type_alignment_bytes(ir_element_type);
 444         set_type_alignment_bytes(ir_type, align);
 445
 446         if (type->size_constant) {
 447                 int n_elements = type->size;
 448
 449                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 450
 451                 size_t elemsize = get_type_size_bytes(ir_element_type);
 452                 if (elemsize % align > 0) {
 453                         elemsize += align - (elemsize % align);
 454                 }
 455                 set_type_size_bytes(ir_type, n_elements * elemsize);
 456         } else {
 457                 set_array_lower_bound_int(ir_type, 0, 0);
 458         }
 459         set_type_state(ir_type, layout_fixed);
 460
 461         return ir_type;
 462 }
 463
 464 /**
 465  * Return the signed integer type of size bits.
 466  *
 467  * @param size   the size
 468  */
 469 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 470                                                  unsigned size)
 471 {
 472         static ir_mode *s_modes[64 + 1] = {NULL, };
 473         ir_type *res;
 474         ir_mode *mode;
 475
 476         if (size <= 0 || size > 64)
 477                 return NULL;
 478
 479         mode = s_modes[size];
 480         if (mode == NULL) {
 481                 char name[32];
 482
 483                 snprintf(name, sizeof(name), "bf_I%u", size);
 484                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 485                                    size <= 32 ? 32 : size );
 486                 s_modes[size] = mode;
 487         }
 488
 489         char name[32];
 490         snprintf(name, sizeof(name), "I%u", size);
 491         ident *id = new_id_from_str(name);
 492         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 493         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 494         set_primitive_base_type(res, base_tp);
 495
 496         return res;
 497 }
 498
 499 /**
 500  * Return the unsigned integer type of size bits.
 501  *
 502  * @param size   the size
 503  */
 504 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 505                                                    unsigned size)
 506 {
 507         static ir_mode *u_modes[64 + 1] = {NULL, };
 508         ir_type *res;
 509         ir_mode *mode;
 510
 511         if (size <= 0 || size > 64)
 512                 return NULL;
 513
 514         mode = u_modes[size];
 515         if (mode == NULL) {
 516                 char name[32];
 517
 518                 snprintf(name, sizeof(name), "bf_U%u", size);
 519                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 520                                    size <= 32 ? 32 : size );
 521                 u_modes[size] = mode;
 522         }
 523
 524         char name[32];
 525
 526         snprintf(name, sizeof(name), "U%u", size);
 527         ident *id = new_id_from_str(name);
 528         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 529         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 530         set_primitive_base_type(res, base_tp);
 531
 532         return res;
 533 }
 534
 535 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 536 {
 537         type_t *base = skip_typeref(type->base_type);
 538         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 539         ir_type *irbase = get_ir_type(base);
 540
 541         unsigned size = type->bit_size;
 542
 543         assert(!is_type_float(base));
 544         if (is_type_signed(base)) {
 545                 return get_signed_int_type_for_bit_size(irbase, size);
 546         } else {
 547                 return get_unsigned_int_type_for_bit_size(irbase, size);
 548         }
 549 }
 550
 551 #define INVALID_TYPE ((ir_type_ptr)-1)
 552
 553 enum {
 554         COMPOUND_IS_STRUCT = false,
 555         COMPOUND_IS_UNION  = true
 556 };
 557
 558 /**
 559  * Construct firm type from ast struct type.
 560  *
 561  * As anonymous inner structs get flattened to a single firm type, we might get
 562  * irtype, outer_offset and out_align passed (they represent the position of
 563  * the anonymous inner struct inside the resulting firm struct)
 564  */
 565 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 566                                      size_t *outer_offset, size_t *outer_align,
 567                                      bool incomplete, bool is_union)
 568 {
 569         compound_t *compound = type->compound;
 570
 571         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 572                 return compound->irtype;
 573         }
 574
 575         size_t align_all  = 1;
 576         size_t offset     = 0;
 577         size_t bit_offset = 0;
 578         size_t size       = 0;
 579
 580         if (irtype == NULL) {
 581                 symbol_t *symbol = compound->base.symbol;
 582                 ident    *id;
 583                 if (symbol != NULL) {
 584                         id = new_id_from_str(symbol->string);
 585                 } else {
 586                         if (is_union) {
 587                                 id = id_unique("__anonymous_union.%u");
 588                         } else {
 589                                 id = id_unique("__anonymous_struct.%u");
 590                         }
 591                 }
 592                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 593
 594                 if (is_union) {
 595                         irtype = new_d_type_union(id, dbgi);
 596                 } else {
 597                         irtype = new_d_type_struct(id, dbgi);
 598                 }
 599
 600                 compound->irtype_complete = false;
 601                 compound->irtype          = irtype;
 602         } else {
 603                 offset    = *outer_offset;
 604                 align_all = *outer_align;
 605         }
 606
 607         if (incomplete)
 608                 return irtype;
 609
 610         compound->irtype_complete = true;
 611
 612         entity_t *entry = compound->members.entities;
 613         for ( ; entry != NULL; entry = entry->base.next) {
 614                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 615                         continue;
 616
 617                 size_t prev_offset = offset;
 618
 619                 symbol_t *symbol     = entry->base.symbol;
 620                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 621                 entry_type
 622                         = get_aligned_type(entry_type, entry->compound_member.alignment);
 623                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 624
 625                 ident    *ident;
 626                 if (symbol != NULL) {
 627                         ident = new_id_from_str(symbol->string);
 628                 } else {
 629                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 630                                 create_compound_type(&entry_type->compound, irtype, &offset,
 631                                                      &align_all, false, COMPOUND_IS_STRUCT);
 632                                 goto finished_member;
 633                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 634                                 create_compound_type(&entry_type->compound, irtype, &offset,
 635                                                      &align_all, false, COMPOUND_IS_UNION);
 636                                 goto finished_member;
 637                         } else {
 638                                 assert(entry_type->kind == TYPE_BITFIELD);
 639                         }
 640                         ident = id_unique("anon.%u");
 641                 }
 642
 643                 ir_type *base_irtype;
 644                 if (entry_type->kind == TYPE_BITFIELD) {
 645                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 646                 } else {
 647                         base_irtype = get_ir_type(entry_type);
 648                 }
 649
 650                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 651                 size_t misalign        = offset % entry_alignment;
 652
 653                 ir_type   *entry_irtype = get_ir_type(entry_type);
 654                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 655
 656                 size_t base;
 657                 size_t bits_remainder;
 658                 if (entry_type->kind == TYPE_BITFIELD) {
 659                         size_t size_bits      = entry_type->bitfield.bit_size;
 660                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 661
 662                         if (size_bits > rest_size_bits) {
 663                                 /* start a new bucket */
 664                                 offset     += entry_alignment - misalign;
 665                                 bit_offset  = 0;
 666
 667                                 base           = offset;
 668                                 bits_remainder = 0;
 669                         } else {
 670                                 /* put into current bucket */
 671                                 base           = offset - misalign;
 672                                 bits_remainder = misalign * 8 + bit_offset;
 673                         }
 674
 675                         offset     += size_bits / 8;
 676                         bit_offset  = bit_offset + (size_bits % 8);
 677                 } else {
 678                         size_t entry_size = get_type_size_bytes(base_irtype);
 679                         if (misalign > 0 || bit_offset > 0)
 680                                 offset += entry_alignment - misalign;
 681
 682                         base           = offset;
 683                         bits_remainder = 0;
 684                         offset        += entry_size;
 685                         bit_offset     = 0;
 686                 }
 687
 688                 if (entry_alignment > align_all) {
 689                         if (entry_alignment % align_all != 0) {
 690                                 panic("uneven alignments not supported yet");
 691                         }
 692                         align_all = entry_alignment;
 693                 }
 694
 695                 set_entity_offset(entity, base);
 696                 set_entity_offset_bits_remainder(entity,
 697                                                  (unsigned char) bits_remainder);
 698                 //add_struct_member(irtype, entity);
 699                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 700                 assert(entry->compound_member.entity == NULL);
 701                 entry->compound_member.entity = entity;
 702
 703 finished_member:
 704                 if (is_union) {
 705                         size_t entry_size = offset - prev_offset;
 706                         if (entry_size > size) {
 707                                 size = entry_size;
 708                         }
 709                         offset     = 0;
 710                         bit_offset = 0;
 711                 }
 712         }
 713
 714         if (!is_union) {
 715                 size = offset;
 716         }
 717
 718         size_t misalign = offset % align_all;
 719         if (misalign > 0 || bit_offset > 0) {
 720                 size += align_all - misalign;
 721         }
 722
 723         if (outer_offset != NULL) {
 724                 if (!is_union) {
 725                         *outer_offset = offset;
 726                 } else {
 727                         *outer_offset += size;
 728                 }
 729
 730                 if (align_all > *outer_align) {
 731                         if (align_all % *outer_align != 0) {
 732                                 panic("uneven alignments not supported yet");
 733                         }
 734                         *outer_align = align_all;
 735                 }
 736         } else {
 737                 set_type_alignment_bytes(irtype, align_all);
 738                 set_type_size_bytes(irtype, size);
 739                 set_type_state(irtype, layout_fixed);
 740         }
 741
 742         return irtype;
 743 }
 744
 745 static ir_type *create_enum_type(enum_type_t *const type)
 746 {
 747         type->base.firm_type = ir_type_int;
 748
 749         ir_mode *const mode    = mode_int;
 750         tarval  *const one     = get_mode_one(mode);
 751         tarval  *      tv_next = get_tarval_null(mode);
 752
 753         bool constant_folding_old = constant_folding;
 754         constant_folding = true;
 755
 756         enum_t   *enume = type->enume;
 757         entity_t *entry = enume->base.next;
 758         for (; entry != NULL; entry = entry->base.next) {
 759                 if (entry->kind != ENTITY_ENUM_VALUE)
 760                         break;
 761
 762                 expression_t *const init = entry->enum_value.value;
 763                 if (init != NULL) {
 764                         ir_node *const cnst = expression_to_firm(init);
 765                         if (!is_Const(cnst)) {
 766                                 panic("couldn't fold constant");
 767                         }
 768                         tv_next = get_Const_tarval(cnst);
 769                 }
 770                 entry->enum_value.tv = tv_next;
 771                 tv_next = tarval_add(tv_next, one);
 772         }
 773
 774         constant_folding = constant_folding_old;
 775
 776         return create_atomic_type(type->akind, type->base.alignment);
 777 }
 778
 779 static ir_type *get_ir_type_incomplete(type_t *type)
 780 {
 781         assert(type != NULL);
 782         type = skip_typeref(type);
 783
 784         if (type->base.firm_type != NULL) {
 785                 assert(type->base.firm_type != INVALID_TYPE);
 786                 return type->base.firm_type;
 787         }
 788
 789         switch (type->kind) {
 790         case TYPE_COMPOUND_STRUCT:
 791                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 792                                             true, COMPOUND_IS_STRUCT);
 793         case TYPE_COMPOUND_UNION:
 794                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 795                                             true, COMPOUND_IS_UNION);
 796         default:
 797                 return get_ir_type(type);
 798         }
 799 }
 800
 801 ir_type *get_ir_type(type_t *type)
 802 {
 803         assert(type != NULL);
 804
 805         type = skip_typeref(type);
 806
 807         if (type->base.firm_type != NULL) {
 808                 assert(type->base.firm_type != INVALID_TYPE);
 809                 return type->base.firm_type;
 810         }
 811
 812         ir_type *firm_type = NULL;
 813         switch (type->kind) {
 814         case TYPE_ERROR:
 815                 /* Happens while constant folding, when there was an error */
 816                 return create_atomic_type(ATOMIC_TYPE_VOID, 0);
 817
 818         case TYPE_ATOMIC:
 819                 firm_type = create_atomic_type(type->atomic.akind,
 820                                                type->base.alignment);
 821                 break;
 822         case TYPE_COMPLEX:
 823                 firm_type = create_complex_type(&type->complex);
 824                 break;
 825         case TYPE_IMAGINARY:
 826                 firm_type = create_imaginary_type(&type->imaginary);
 827                 break;
 828         case TYPE_FUNCTION:
 829                 firm_type = create_method_type(&type->function);
 830                 break;
 831         case TYPE_POINTER:
 832                 firm_type = create_pointer_type(&type->pointer);
 833                 break;
 834         case TYPE_REFERENCE:
 835                 firm_type = create_reference_type(&type->reference);
 836                 break;
 837         case TYPE_ARRAY:
 838                 firm_type = create_array_type(&type->array);
 839                 break;
 840         case TYPE_COMPOUND_STRUCT:
 841                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 842                                                  false, COMPOUND_IS_STRUCT);
 843                 break;
 844         case TYPE_COMPOUND_UNION:
 845                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 846                                                  false, COMPOUND_IS_UNION);
 847                 break;
 848         case TYPE_ENUM:
 849                 firm_type = create_enum_type(&type->enumt);
 850                 break;
 851         case TYPE_BUILTIN:
 852                 firm_type = get_ir_type(type->builtin.real_type);
 853                 break;
 854         case TYPE_BITFIELD:
 855                 firm_type = create_bitfield_type(&type->bitfield);
 856                 break;
 857
 858         case TYPE_TYPEOF:
 859         case TYPE_TYPEDEF:
 860         case TYPE_INVALID:
 861                 break;
 862         }
 863         if (firm_type == NULL)
 864                 panic("unknown type found");
 865
 866         type->base.firm_type = firm_type;
 867         return firm_type;
 868 }
 869
 870 static ir_mode *get_ir_mode_storage(type_t *type)
 871 {
 872         ir_type *irtype = get_ir_type(type);
 873
 874         /* firm doesn't report a mode for arrays somehow... */
 875         if (is_Array_type(irtype)) {
 876                 return mode_P_data;
 877         }
 878
 879         ir_mode *mode = get_type_mode(irtype);
 880         assert(mode != NULL);
 881         return mode;
 882 }
 883
 884 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 885 {
 886         ir_mode *mode = get_ir_mode_storage(type);
 887         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 888                 return mode_float_arithmetic;
 889         }
 890
 891         return mode;
 892 }
 893
 894 /** Names of the runtime functions. */
 895 static const struct {
 896         int        id;           /**< the rts id */
 897         int        n_res;        /**< number of return values */
 898         const char *name;        /**< the name of the rts function */
 899         int        n_params;     /**< number of parameters */
 900         unsigned   flags;        /**< language flags */
 901 } rts_data[] = {
 902         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 903         { rts_abort,      0, "abort",        0, _C89 },
 904         { rts_alloca,     1, "alloca",       1, _ALL },
 905         { rts_abs,        1, "abs",          1, _C89 },
 906         { rts_labs,       1, "labs",         1, _C89 },
 907         { rts_llabs,      1, "llabs",        1, _C99 },
 908         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 909
 910         { rts_fabs,       1, "fabs",         1, _C89 },
 911         { rts_sqrt,       1, "sqrt",         1, _C89 },
 912         { rts_cbrt,       1, "cbrt",         1, _C99 },
 913         { rts_exp,        1, "exp",          1, _C89 },
 914         { rts_exp2,       1, "exp2",         1, _C89 },
 915         { rts_exp10,      1, "exp10",        1, _GNUC },
 916         { rts_log,        1, "log",          1, _C89 },
 917         { rts_log2,       1, "log2",         1, _C89 },
 918         { rts_log10,      1, "log10",        1, _C89 },
 919         { rts_pow,        1, "pow",          2, _C89 },
 920         { rts_sin,        1, "sin",          1, _C89 },
 921         { rts_cos,        1, "cos",          1, _C89 },
 922         { rts_tan,        1, "tan",          1, _C89 },
 923         { rts_asin,       1, "asin",         1, _C89 },
 924         { rts_acos,       1, "acos",         1, _C89 },
 925         { rts_atan,       1, "atan",         1, _C89 },
 926         { rts_sinh,       1, "sinh",         1, _C89 },
 927         { rts_cosh,       1, "cosh",         1, _C89 },
 928         { rts_tanh,       1, "tanh",         1, _C89 },
 929
 930         { rts_fabsf,      1, "fabsf",        1, _C99 },
 931         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 932         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 933         { rts_expf,       1, "expf",         1, _C99 },
 934         { rts_exp2f,      1, "exp2f",        1, _C99 },
 935         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 936         { rts_logf,       1, "logf",         1, _C99 },
 937         { rts_log2f,      1, "log2f",        1, _C99 },
 938         { rts_log10f,     1, "log10f",       1, _C99 },
 939         { rts_powf,       1, "powf",         2, _C99 },
 940         { rts_sinf,       1, "sinf",         1, _C99 },
 941         { rts_cosf,       1, "cosf",         1, _C99 },
 942         { rts_tanf,       1, "tanf",         1, _C99 },
 943         { rts_asinf,      1, "asinf",        1, _C99 },
 944         { rts_acosf,      1, "acosf",        1, _C99 },
 945         { rts_atanf,      1, "atanf",        1, _C99 },
 946         { rts_sinhf,      1, "sinhf",        1, _C99 },
 947         { rts_coshf,      1, "coshf",        1, _C99 },
 948         { rts_tanhf,      1, "tanhf",        1, _C99 },
 949
 950         { rts_fabsl,      1, "fabsl",        1, _C99 },
 951         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 952         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 953         { rts_expl,       1, "expl",         1, _C99 },
 954         { rts_exp2l,      1, "exp2l",        1, _C99 },
 955         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 956         { rts_logl,       1, "logl",         1, _C99 },
 957         { rts_log2l,      1, "log2l",        1, _C99 },
 958         { rts_log10l,     1, "log10l",       1, _C99 },
 959         { rts_powl,       1, "powl",         2, _C99 },
 960         { rts_sinl,       1, "sinl",         1, _C99 },
 961         { rts_cosl,       1, "cosl",         1, _C99 },
 962         { rts_tanl,       1, "tanl",         1, _C99 },
 963         { rts_asinl,      1, "asinl",        1, _C99 },
 964         { rts_acosl,      1, "acosl",        1, _C99 },
 965         { rts_atanl,      1, "atanl",        1, _C99 },
 966         { rts_sinhl,      1, "sinhl",        1, _C99 },
 967         { rts_coshl,      1, "coshl",        1, _C99 },
 968         { rts_tanhl,      1, "tanhl",        1, _C99 },
 969
 970         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 971         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 972         { rts_strcmp,     1, "strcmp",       2, _C89 },
 973         { rts_strncmp,    1, "strncmp",      3, _C89 }
 974 };
 975
 976 static ident *rts_idents[lengthof(rts_data)];
 977
 978 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 979
 980 /**
 981  * Handle GNU attributes for entities
 982  *
 983  * @param ent   the entity
 984  * @param decl  the routine declaration
 985  */
 986 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
 987 {
 988         assert(is_declaration(entity));
 989         decl_modifiers_t modifiers = entity->declaration.modifiers;
 990         if (modifiers & DM_PURE) {
 991                 /* TRUE if the declaration includes the GNU
 992                    __attribute__((pure)) specifier. */
 993                 set_entity_additional_property(irentity, mtp_property_pure);
 994         }
 995         if (modifiers & DM_CONST) {
 996                 set_entity_additional_property(irentity, mtp_property_const);
 997                 have_const_functions = true;
 998         }
 999         if (modifiers & DM_USED) {
1000                 /* TRUE if the declaration includes the GNU
1001                    __attribute__((used)) specifier. */
1002                 set_entity_stickyness(irentity, stickyness_sticky);
1003         }
1004 }
1005
1006 static bool is_main(entity_t *entity)
1007 {
1008         static symbol_t *sym_main = NULL;
1009         if (sym_main == NULL) {
1010                 sym_main = symbol_table_insert("main");
1011         }
1012
1013         if (entity->base.symbol != sym_main)
1014                 return false;
1015         /* must be in outermost scope */
1016         if (entity->base.parent_scope != &current_translation_unit->scope)
1017                 return false;
1018
1019         return true;
1020 }
1021
1022 /**
1023  * Creates an entity representing a function.
1024  *
1025  * @param declaration  the function declaration
1026  */
1027 static ir_entity *get_function_entity(entity_t *entity)
1028 {
1029         assert(entity->kind == ENTITY_FUNCTION);
1030         if (entity->function.entity != NULL) {
1031                 return entity->function.entity;
1032         }
1033
1034         if (is_main(entity)) {
1035                 /* force main to C linkage */
1036                 type_t *type = entity->declaration.type;
1037                 assert(is_type_function(type));
1038                 if (type->function.linkage != LINKAGE_C) {
1039                         type_t *new_type           = duplicate_type(type);
1040                         new_type->function.linkage = LINKAGE_C;
1041                         type                       = identify_new_type(new_type);
1042                         entity->declaration.type   = type;
1043                 }
1044         }
1045
1046         symbol_t *symbol = entity->base.symbol;
1047         ident    *id     = new_id_from_str(symbol->string);
1048
1049         ir_type   *global_type    = get_glob_type();
1050         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1051         bool const has_body       = entity->function.statement != NULL;
1052
1053         /* already an entity defined? */
1054         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1055         if (irentity != NULL) {
1056                 if (get_entity_visibility(irentity) == visibility_external_allocated
1057                                 && has_body) {
1058                         set_entity_visibility(irentity, visibility_external_visible);
1059                 }
1060                 goto entity_created;
1061         }
1062
1063         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1064         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1065         set_entity_ld_ident(irentity, create_ld_ident(entity));
1066
1067         handle_gnu_attributes_ent(irentity, entity);
1068
1069         /* static inline             => local
1070          * extern inline             => local
1071          * inline without definition => local
1072          * inline with definition    => external_visible */
1073         storage_class_tag_t const storage_class
1074                 = (storage_class_tag_t) entity->declaration.storage_class;
1075         bool                const is_inline     = entity->function.is_inline;
1076         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1077                 set_entity_visibility(irentity, visibility_external_visible);
1078         } else if (storage_class == STORAGE_CLASS_STATIC ||
1079                    (is_inline && has_body)) {
1080                 if (!has_body) {
1081                         /* this entity was declared, but is defined nowhere */
1082                         set_entity_peculiarity(irentity, peculiarity_description);
1083                 }
1084                 set_entity_visibility(irentity, visibility_local);
1085         } else if (has_body) {
1086                 set_entity_visibility(irentity, visibility_external_visible);
1087         } else {
1088                 set_entity_visibility(irentity, visibility_external_allocated);
1089         }
1090         set_entity_allocation(irentity, allocation_static);
1091
1092         /* We should check for file scope here, but as long as we compile C only
1093            this is not needed. */
1094         if (! firm_opt.freestanding) {
1095                 /* check for a known runtime function */
1096                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1097                         if (id != rts_idents[i])
1098                                 continue;
1099
1100                         /* ignore those rts functions not necessary needed for current mode */
1101                         if ((c_mode & rts_data[i].flags) == 0)
1102                                 continue;
1103                         assert(rts_entities[rts_data[i].id] == NULL);
1104                         rts_entities[rts_data[i].id] = irentity;
1105                 }
1106         }
1107
1108         entitymap_insert(&entitymap, symbol, irentity);
1109
1110 entity_created:
1111         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1112         entity->function.entity  = irentity;
1113
1114         return irentity;
1115 }
1116
1117 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1118 {
1119         ir_mode *value_mode = get_irn_mode(value);
1120
1121         if (value_mode == dest_mode || is_Bad(value))
1122                 return value;
1123
1124         if (dest_mode == mode_b) {
1125                 ir_node *zero = new_Const(get_mode_null(value_mode));
1126                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1127                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1128                 return proj;
1129         }
1130
1131         return new_d_Conv(dbgi, value, dest_mode);
1132 }
1133
1134 /**
1135  * Creates a Const node representing a constant.
1136  */
1137 static ir_node *const_to_firm(const const_expression_t *cnst)
1138 {
1139         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1140         type_t   *type = skip_typeref(cnst->base.type);
1141         ir_mode  *mode = get_ir_mode_storage(type);
1142
1143         char    buf[128];
1144         tarval *tv;
1145         size_t  len;
1146         if (mode_is_float(mode)) {
1147                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1148         } else {
1149                 if (mode_is_signed(mode)) {
1150                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1151                 } else {
1152                         len = snprintf(buf, sizeof(buf), "%llu",
1153                                        (unsigned long long) cnst->v.int_value);
1154                 }
1155                 tv = new_tarval_from_str(buf, len, mode);
1156         }
1157
1158         ir_node *res        = new_d_Const(dbgi, tv);
1159         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1160         return create_conv(dbgi, res, mode_arith);
1161 }
1162
1163 /**
1164  * Creates a Const node representing a character constant.
1165  */
1166 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1167 {
1168         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1169         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1170
1171         long long int v;
1172         size_t const  size = cnst->v.character.size;
1173         if (size == 1 && char_is_signed) {
1174                 v = (signed char)cnst->v.character.begin[0];
1175         } else {
1176                 v = 0;
1177                 for (size_t i = 0; i < size; ++i) {
1178                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1179                 }
1180         }
1181         char    buf[128];
1182         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1183         tarval *tv = new_tarval_from_str(buf, len, mode);
1184
1185         return new_d_Const(dbgi, tv);
1186 }
1187
1188 /**
1189  * Creates a Const node representing a wide character constant.
1190  */
1191 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1192 {
1193         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1194         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1195
1196         long long int v = cnst->v.wide_character.begin[0];
1197
1198         char    buf[128];
1199         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1200         tarval *tv = new_tarval_from_str(buf, len, mode);
1201
1202         return new_d_Const(dbgi, tv);
1203 }
1204
1205 /**
1206  * Creates a SymConst for a given entity.
1207  *
1208  * @param dbgi    debug info
1209  * @param mode    the (reference) mode for the SymConst
1210  * @param entity  the entity
1211  */
1212 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1213                               ir_entity *entity)
1214 {
1215         assert(entity != NULL);
1216         union symconst_symbol sym;
1217         sym.entity_p = entity;
1218         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1219 }
1220
1221 /**
1222  * Creates a SymConst node representing a string constant.
1223  *
1224  * @param src_pos    the source position of the string constant
1225  * @param id_prefix  a prefix for the name of the generated string constant
1226  * @param value      the value of the string constant
1227  */
1228 static ir_node *string_to_firm(const source_position_t *const src_pos,
1229                                const char *const id_prefix,
1230                                const string_t *const value)
1231 {
1232         ir_type  *const global_type = get_glob_type();
1233         dbg_info *const dbgi        = get_dbg_info(src_pos);
1234         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1235                                                        ir_type_const_char, dbgi);
1236
1237         ident     *const id     = id_unique(id_prefix);
1238         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1239         set_entity_ld_ident(entity, id);
1240         set_entity_variability(entity, variability_constant);
1241         set_entity_allocation(entity, allocation_static);
1242
1243         ir_type *const elem_type = ir_type_const_char;
1244         ir_mode *const mode      = get_type_mode(elem_type);
1245
1246         const char* const string = value->begin;
1247         const size_t      slen   = value->size;
1248
1249         set_array_lower_bound_int(type, 0, 0);
1250         set_array_upper_bound_int(type, 0, slen);
1251         set_type_size_bytes(type, slen);
1252         set_type_state(type, layout_fixed);
1253
1254         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1255         for (size_t i = 0; i < slen; ++i) {
1256                 tvs[i] = new_tarval_from_long(string[i], mode);
1257         }
1258
1259         set_array_entity_values(entity, tvs, slen);
1260         free(tvs);
1261
1262         return create_symconst(dbgi, mode_P_data, entity);
1263 }
1264
1265 /**
1266  * Creates a SymConst node representing a string literal.
1267  *
1268  * @param literal   the string literal
1269  */
1270 static ir_node *string_literal_to_firm(
1271                 const string_literal_expression_t* literal)
1272 {
1273         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1274                               &literal->value);
1275 }
1276
1277 /**
1278  * Creates a SymConst node representing a wide string literal.
1279  *
1280  * @param literal   the wide string literal
1281  */
1282 static ir_node *wide_string_literal_to_firm(
1283         const wide_string_literal_expression_t* const literal)
1284 {
1285         ir_type *const global_type = get_glob_type();
1286         ir_type *const elem_type   = ir_type_wchar_t;
1287         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1288         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1289                                                     elem_type, dbgi);
1290
1291         ident     *const id     = id_unique("Lstr.%u");
1292         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1293         set_entity_ld_ident(entity, id);
1294         set_entity_variability(entity, variability_constant);
1295         set_entity_allocation(entity, allocation_static);
1296
1297         ir_mode *const mode      = get_type_mode(elem_type);
1298
1299         const wchar_rep_t *const string = literal->value.begin;
1300         const size_t             slen   = literal->value.size;
1301
1302         set_array_lower_bound_int(type, 0, 0);
1303         set_array_upper_bound_int(type, 0, slen);
1304         set_type_size_bytes(type, slen);
1305         set_type_state(type, layout_fixed);
1306
1307         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1308         for (size_t i = 0; i < slen; ++i) {
1309                 tvs[i] = new_tarval_from_long(string[i], mode);
1310         }
1311
1312         set_array_entity_values(entity, tvs, slen);
1313         free(tvs);
1314
1315         return create_symconst(dbgi, mode_P_data, entity);
1316 }
1317
1318 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1319                                       ir_node *const addr)
1320 {
1321         ir_type *irtype = get_ir_type(type);
1322         if (is_compound_type(irtype)
1323                         || is_Method_type(irtype)
1324                         || is_Array_type(irtype)) {
1325                 return addr;
1326         }
1327
1328         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1329                                   ? cons_volatile : cons_none;
1330         ir_mode *const mode     = get_type_mode(irtype);
1331         ir_node *const memory   = get_store();
1332         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1333         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1334         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1335
1336         set_store(load_mem);
1337
1338         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1339         return create_conv(dbgi, load_res, mode_arithmetic);
1340 }
1341
1342 /**
1343  * Creates a strict Conv if necessary.
1344  */
1345 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1346 {
1347         ir_mode *mode = get_irn_mode(node);
1348
1349         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1350                 return node;
1351         if (!mode_is_float(mode))
1352                 return node;
1353
1354         /* check if there is already a Conv */
1355         if (is_Conv(node)) {
1356                 /* convert it into a strict Conv */
1357                 set_Conv_strict(node, 1);
1358                 return node;
1359         }
1360
1361         /* otherwise create a new one */
1362         return new_d_strictConv(dbgi, node, mode);
1363 }
1364
1365 static ir_node *get_global_var_address(dbg_info *const dbgi,
1366                                        const entity_t *const entity)
1367 {
1368         assert(entity->kind == ENTITY_VARIABLE);
1369         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1370
1371         ir_entity *const irentity = entity->variable.v.entity;
1372         if (entity->variable.thread_local) {
1373                 ir_node *const no_mem = new_NoMem();
1374                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1375                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1376         } else {
1377                 return create_symconst(dbgi, mode_P_data, irentity);
1378         }
1379 }
1380
1381 /**
1382  * Returns the correct base address depending on whether it is a parameter or a
1383  * normal local variable.
1384  */
1385 static ir_node *get_local_frame(ir_entity *const ent)
1386 {
1387         ir_graph      *const irg   = current_ir_graph;
1388         const ir_type *const owner = get_entity_owner(ent);
1389         if (owner == get_irg_frame_type(irg)) {
1390                 return get_irg_frame(irg);
1391         } else {
1392                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1393                 return get_irg_value_param_base(irg);
1394         }
1395 }
1396
1397 /**
1398  * Keep all memory edges of the given block.
1399  */
1400 static void keep_all_memory(ir_node *block)
1401 {
1402         ir_node *old = get_cur_block();
1403
1404         set_cur_block(block);
1405         keep_alive(get_store());
1406         /* TODO: keep all memory edges from restricted pointers */
1407         set_cur_block(old);
1408 }
1409
1410 static ir_node *reference_expression_enum_value_to_firm(
1411                 const reference_expression_t *ref)
1412 {
1413         entity_t *entity = ref->entity;
1414         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1415         /* make sure the type is constructed */
1416         (void) get_ir_type(type);
1417
1418         return new_Const(entity->enum_value.tv);
1419 }
1420
1421 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1422 {
1423         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1424         entity_t *entity = ref->entity;
1425         assert(is_declaration(entity));
1426         type_t   *type   = skip_typeref(entity->declaration.type);
1427
1428         /* make sure the type is constructed */
1429         (void) get_ir_type(type);
1430
1431         switch ((declaration_kind_t) entity->declaration.kind) {
1432         case DECLARATION_KIND_UNKNOWN:
1433                 break;
1434
1435         case DECLARATION_KIND_LOCAL_VARIABLE: {
1436                 ir_mode *const mode  = get_ir_mode_storage(type);
1437                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1438                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1439         }
1440         case DECLARATION_KIND_PARAMETER: {
1441                 ir_mode *const mode  = get_ir_mode_storage(type);
1442                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1443                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1444         }
1445         case DECLARATION_KIND_FUNCTION: {
1446                 ir_mode *const mode = get_ir_mode_storage(type);
1447
1448                 if (entity->function.btk != bk_none) {
1449                         /* for gcc compatibility we have to produce (dummy) addresses for some
1450                          * builtins */
1451                         if (warning.other) {
1452                                 warningf(&ref->base.source_position,
1453                                         "taking address of builtin '%Y'", ref->entity->base.symbol);
1454                         }
1455
1456                         /* simply create a NULL pointer */
1457                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1458                         ir_node  *res  = new_Const_long(mode, 0);
1459
1460                         return res;
1461                 }
1462                 return create_symconst(dbgi, mode, entity->function.entity);
1463         }
1464         case DECLARATION_KIND_INNER_FUNCTION: {
1465                 ir_mode *const mode = get_ir_mode_storage(type);
1466                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1467                         /* inner function not using the closure */
1468                         return create_symconst(dbgi, mode, entity->function.entity);
1469                 } else {
1470                         /* TODO: need trampoline here */
1471                         panic("Trampoline code not implemented");
1472                         return create_symconst(dbgi, mode, entity->function.entity);
1473                 }
1474         }
1475         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1476                 ir_node *const addr = get_global_var_address(dbgi, entity);
1477                 return deref_address(dbgi, entity->declaration.type, addr);
1478         }
1479
1480         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1481                 ir_entity *irentity = entity->variable.v.entity;
1482                 ir_node   *frame    = get_local_frame(irentity);
1483                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1484                 return deref_address(dbgi, entity->declaration.type, sel);
1485         }
1486         case DECLARATION_KIND_PARAMETER_ENTITY: {
1487                 ir_entity *irentity = entity->parameter.v.entity;
1488                 ir_node   *frame    = get_local_frame(irentity);
1489                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1490                 return deref_address(dbgi, entity->declaration.type, sel);
1491         }
1492
1493         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1494                 return entity->variable.v.vla_base;
1495
1496         case DECLARATION_KIND_COMPOUND_MEMBER:
1497                 panic("not implemented reference type");
1498         }
1499
1500         panic("reference to declaration with unknown type found");
1501 }
1502
1503 static ir_node *reference_addr(const reference_expression_t *ref)
1504 {
1505         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1506         entity_t *entity = ref->entity;
1507         assert(is_declaration(entity));
1508
1509         switch((declaration_kind_t) entity->declaration.kind) {
1510         case DECLARATION_KIND_UNKNOWN:
1511                 break;
1512         case DECLARATION_KIND_PARAMETER:
1513         case DECLARATION_KIND_LOCAL_VARIABLE:
1514                 /* you can store to a local variable (so we don't panic but return NULL
1515                  * as an indicator for no real address) */
1516                 return NULL;
1517         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1518                 ir_node *const addr = get_global_var_address(dbgi, entity);
1519                 return addr;
1520         }
1521         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1522                 ir_entity *irentity = entity->variable.v.entity;
1523                 ir_node   *frame    = get_local_frame(irentity);
1524                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1525
1526                 return sel;
1527         }
1528         case DECLARATION_KIND_PARAMETER_ENTITY: {
1529                 ir_entity *irentity = entity->parameter.v.entity;
1530                 ir_node   *frame    = get_local_frame(irentity);
1531                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1532
1533                 return sel;
1534         }
1535
1536         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1537                 return entity->variable.v.vla_base;
1538
1539         case DECLARATION_KIND_FUNCTION: {
1540                 type_t  *const type = skip_typeref(entity->declaration.type);
1541                 ir_mode *const mode = get_ir_mode_storage(type);
1542                 return create_symconst(dbgi, mode, entity->function.entity);
1543         }
1544
1545         case DECLARATION_KIND_INNER_FUNCTION:
1546         case DECLARATION_KIND_COMPOUND_MEMBER:
1547                 panic("not implemented reference type");
1548         }
1549
1550         panic("reference to declaration with unknown type found");
1551 }
1552
1553 /**
1554  * Generate an unary builtin.
1555  *
1556  * @param kind           the builtin kind to generate
1557  * @param op             the operand
1558  * @param function_type  the function type for the GNU builtin routine
1559  * @param db             debug info
1560  */
1561 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1562 {
1563         ir_node *in[1];
1564         in[0] = expression_to_firm(op);
1565
1566         ir_type *tp  = get_ir_type(function_type);
1567         ir_type *res = get_method_res_type(tp, 0);
1568         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), kind, 1, in, tp);
1569         set_irn_pinned(irn, op_pin_state_floats);
1570         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1571 }
1572
1573 /**
1574  * Transform calls to builtin functions.
1575  */
1576 static ir_node *process_builtin_call(const call_expression_t *call)
1577 {
1578         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1579
1580         assert(call->function->kind == EXPR_REFERENCE);
1581         reference_expression_t *builtin = &call->function->reference;
1582
1583         type_t *type = skip_typeref(builtin->base.type);
1584         assert(is_type_pointer(type));
1585
1586         type_t   *function_type = skip_typeref(type->pointer.points_to);
1587
1588         switch (builtin->entity->function.btk) {
1589         case bk_gnu_builtin_alloca: {
1590                 if (call->arguments == NULL || call->arguments->next != NULL) {
1591                         panic("invalid number of parameters on __builtin_alloca");
1592                 }
1593                 expression_t *argument = call->arguments->expression;
1594                 ir_node      *size     = expression_to_firm(argument);
1595
1596                 ir_node *store  = get_store();
1597                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1598                                               stack_alloc);
1599                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1600                 set_store(proj_m);
1601                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1602
1603                 return res;
1604         }
1605
1606         case bk_gnu_builtin_huge_val:
1607         case bk_gnu_builtin_inf:
1608         case bk_gnu_builtin_inff:
1609         case bk_gnu_builtin_infl: {
1610                 type_t  *type = function_type->function.return_type;
1611                 ir_mode *mode = get_ir_mode_arithmetic(type);
1612                 tarval  *tv   = get_mode_infinite(mode);
1613                 ir_node *res  = new_d_Const(dbgi, tv);
1614                 return   res;
1615         }
1616         case bk_gnu_builtin_nan:
1617         case bk_gnu_builtin_nanf:
1618         case bk_gnu_builtin_nanl: {
1619                 /* Ignore string for now... */
1620                 assert(is_type_function(function_type));
1621                 type_t  *type = function_type->function.return_type;
1622                 ir_mode *mode = get_ir_mode_arithmetic(type);
1623                 tarval  *tv   = get_mode_NAN(mode);
1624                 ir_node *res  = new_d_Const(dbgi, tv);
1625                 return res;
1626         }
1627         case bk_gnu_builtin_expect: {
1628                 expression_t *argument = call->arguments->expression;
1629                 return _expression_to_firm(argument);
1630         }
1631         case bk_gnu_builtin_va_end:
1632                 /* evaluate the argument of va_end for its side effects */
1633                 _expression_to_firm(call->arguments->expression);
1634                 return NULL;
1635         case bk_gnu_builtin_frame_address: {
1636                 expression_t *const expression = call->arguments->expression;
1637                 long val = fold_constant(expression);
1638                 if (val == 0) {
1639                         /* the nice case */
1640                         return get_irg_frame(current_ir_graph);
1641                 } else {
1642                         /* get the argument */
1643                         ir_node *in[2];
1644
1645                         in[0] = expression_to_firm(expression);
1646                         in[1] = get_irg_frame(current_ir_graph);
1647                         ir_type *tp  = get_ir_type(function_type);
1648                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_frame_addess, 2, in, tp);
1649                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1650                 }
1651         }
1652         case bk_gnu_builtin_return_address: {
1653                 expression_t *const expression = call->arguments->expression;
1654                 ir_node *in[2];
1655
1656                 in[0] = expression_to_firm(expression);
1657                 in[1] = get_irg_frame(current_ir_graph);
1658                 ir_type *tp  = get_ir_type(function_type);
1659                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_return_address, 2, in, tp);
1660                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1661         }
1662         case bk_gnu_builtin_ffs:
1663                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1664         case bk_gnu_builtin_clz:
1665                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1666         case bk_gnu_builtin_ctz:
1667                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1668         case bk_gnu_builtin_popcount:
1669         case bk_ms__popcount:
1670                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1671         case bk_gnu_builtin_parity:
1672                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1673         case bk_gnu_builtin_prefetch: {
1674                 call_argument_t *const args = call->arguments;
1675                 expression_t *const addr    = args->expression;
1676                 ir_node *in[3];
1677
1678                 in[0] = _expression_to_firm(addr);
1679                 if (args->next != NULL) {
1680                         expression_t *const rw = args->next->expression;
1681
1682                         in[1] = _expression_to_firm(rw);
1683
1684                         if (args->next->next != NULL) {
1685                                 expression_t *const locality = args->next->next->expression;
1686
1687                                 in[2] = expression_to_firm(locality);
1688                         } else {
1689                                 in[2] = new_Const_long(mode_int, 3);
1690                         }
1691                 } else {
1692                         in[1] = new_Const_long(mode_int, 0);
1693                         in[2] = new_Const_long(mode_int, 3);
1694                 }
1695                 ir_type *tp  = get_ir_type(function_type);
1696                 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_prefetch, 3, in, tp);
1697                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1698                 return NULL;
1699         }
1700         case bk_gnu_builtin_trap:
1701         case bk_ms__ud2:
1702         {
1703                 ir_type *tp  = get_ir_type(function_type);
1704                 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_trap, 0, NULL, tp);
1705                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1706                 return NULL;
1707         }
1708         case bk_ms__debugbreak: {
1709                 ir_type *tp  = get_ir_type(function_type);
1710                 ir_node *irn = new_d_Builtin(dbgi, get_store(), ir_bk_debugbreak, 0, NULL, tp);
1711                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1712                 return NULL;
1713         }
1714         case bk_ms_ReturnAddress: {
1715                 expression_t *const expression = call->arguments->expression;
1716                 ir_node *in[2];
1717
1718                 in[0] = new_Const_long(mode_int, 0);
1719                 in[1] = get_irg_frame(current_ir_graph);
1720                 ir_type *tp  = get_ir_type(function_type);
1721                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), ir_bk_return_address, 2, in, tp);
1722                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1723         }
1724         default:
1725                 panic("unsupported builtin found");
1726         }
1727 }
1728
1729 /**
1730  * Transform a call expression.
1731  * Handles some special cases, like alloca() calls, which must be resolved
1732  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1733  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1734  * handled right...
1735  */
1736 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1737 {
1738         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1739         assert(get_cur_block() != NULL);
1740
1741         expression_t *function = call->function;
1742         if (function->kind == EXPR_REFERENCE) {
1743                 const reference_expression_t *ref    = &function->reference;
1744                 entity_t                     *entity = ref->entity;
1745
1746                 if (ref->entity->kind == ENTITY_FUNCTION &&
1747                     ref->entity->function.btk != bk_none) {
1748                         return process_builtin_call(call);
1749                 }
1750
1751                 if (entity->kind == ENTITY_FUNCTION
1752                                 && entity->function.entity == rts_entities[rts_alloca]) {
1753                         /* handle alloca() call */
1754                         expression_t *argument = call->arguments->expression;
1755                         ir_node      *size     = expression_to_firm(argument);
1756                         ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1757
1758                         size = create_conv(dbgi, size, mode);
1759
1760                         ir_node  *store  = get_store();
1761                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1762                                                        stack_alloc);
1763                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1764                         set_store(proj_m);
1765                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1766
1767                         return res;
1768                 }
1769         }
1770         ir_node *callee = expression_to_firm(function);
1771
1772         type_t *type = skip_typeref(function->base.type);
1773         assert(is_type_pointer(type));
1774         pointer_type_t *pointer_type = &type->pointer;
1775         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1776         assert(is_type_function(points_to));
1777         function_type_t *function_type = &points_to->function;
1778
1779         int      n_parameters = 0;
1780         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1781         ir_type *new_method_type = NULL;
1782         if (function_type->variadic || function_type->unspecified_parameters) {
1783                 const call_argument_t *argument = call->arguments;
1784                 for ( ; argument != NULL; argument = argument->next) {
1785                         ++n_parameters;
1786                 }
1787
1788                 /* we need to construct a new method type matching the call
1789                  * arguments... */
1790                 int n_res       = get_method_n_ress(ir_method_type);
1791                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1792                                                     n_parameters, n_res, dbgi);
1793                 set_method_calling_convention(new_method_type,
1794                                get_method_calling_convention(ir_method_type));
1795                 set_method_additional_properties(new_method_type,
1796                                get_method_additional_properties(ir_method_type));
1797                 set_method_variadicity(new_method_type,
1798                                        get_method_variadicity(ir_method_type));
1799
1800                 for (int i = 0; i < n_res; ++i) {
1801                         set_method_res_type(new_method_type, i,
1802                                             get_method_res_type(ir_method_type, i));
1803                 }
1804                 argument = call->arguments;
1805                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1806                         expression_t *expression = argument->expression;
1807                         ir_type      *irtype     = get_ir_type(expression->base.type);
1808                         set_method_param_type(new_method_type, i, irtype);
1809                 }
1810                 ir_method_type = new_method_type;
1811         } else {
1812                 n_parameters = get_method_n_params(ir_method_type);
1813         }
1814
1815         ir_node *in[n_parameters];
1816
1817         const call_argument_t *argument = call->arguments;
1818         for (int n = 0; n < n_parameters; ++n) {
1819                 expression_t *expression = argument->expression;
1820                 ir_node      *arg_node   = expression_to_firm(expression);
1821
1822                 type_t  *type = skip_typeref(expression->base.type);
1823                 if (!is_type_compound(type)) {
1824                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1825                         arg_node      = create_conv(dbgi, arg_node, mode);
1826                         arg_node      = do_strict_conv(dbgi, arg_node);
1827                 }
1828
1829                 in[n] = arg_node;
1830
1831                 argument = argument->next;
1832         }
1833
1834         ir_node  *store = get_store();
1835         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1836                                      ir_method_type);
1837         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1838         set_store(mem);
1839
1840         type_t  *return_type = skip_typeref(function_type->return_type);
1841         ir_node *result      = NULL;
1842
1843         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1844                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1845
1846                 if (is_type_scalar(return_type)) {
1847                         ir_mode *mode       = get_ir_mode_storage(return_type);
1848                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1849                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1850                         result              = create_conv(NULL, result, mode_arith);
1851                 } else {
1852                         ir_mode *mode = mode_P_data;
1853                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1854                 }
1855         }
1856
1857         if (function->kind == EXPR_REFERENCE &&
1858             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1859                 /* A dead end:  Keep the Call and the Block.  Also place all further
1860                  * nodes into a new and unreachable block. */
1861                 keep_alive(node);
1862                 keep_alive(get_cur_block());
1863                 new_Block(0, NULL);
1864         }
1865
1866         return result;
1867 }
1868
1869 static void statement_to_firm(statement_t *statement);
1870 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1871
1872 static ir_node *expression_to_addr(const expression_t *expression);
1873 static ir_node *create_condition_evaluation(const expression_t *expression,
1874                                             ir_node *true_block,
1875                                             ir_node *false_block);
1876
1877 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1878                          ir_node *value)
1879 {
1880         if (!is_type_compound(type)) {
1881                 ir_mode *mode = get_ir_mode_storage(type);
1882                 value         = create_conv(dbgi, value, mode);
1883                 value         = do_strict_conv(dbgi, value);
1884         }
1885
1886         ir_node *memory = get_store();
1887
1888         if (is_type_scalar(type)) {
1889                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1890                                       ? cons_volatile : cons_none;
1891                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1892                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1893                 set_store(store_mem);
1894         } else {
1895                 ir_type *irtype    = get_ir_type(type);
1896                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1897                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1898                 set_store(copyb_mem);
1899         }
1900 }
1901
1902 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1903 {
1904         tarval *all_one   = get_mode_all_one(mode);
1905         int     mode_size = get_mode_size_bits(mode);
1906
1907         assert(offset >= 0);
1908         assert(size   >= 0);
1909         assert(offset + size <= mode_size);
1910         if (size == mode_size) {
1911                 return all_one;
1912         }
1913
1914         long    shiftr    = get_mode_size_bits(mode) - size;
1915         long    shiftl    = offset;
1916         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1917         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1918         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1919         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1920
1921         return mask1;
1922 }
1923
1924 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1925                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1926 {
1927         ir_type *entity_type = get_entity_type(entity);
1928         ir_type *base_type   = get_primitive_base_type(entity_type);
1929         assert(base_type != NULL);
1930         ir_mode *mode        = get_type_mode(base_type);
1931
1932         value = create_conv(dbgi, value, mode);
1933
1934         /* kill upper bits of value and shift to right position */
1935         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1936         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1937
1938         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1939         ir_node *mask_node       = new_d_Const(dbgi, mask);
1940         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1941         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1942         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
1943         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1944
1945         /* load current value */
1946         ir_node  *mem             = get_store();
1947         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
1948                                         set_volatile ? cons_volatile : cons_none);
1949         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1950         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1951         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1952         tarval   *inv_mask        = tarval_not(shift_mask);
1953         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1954         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1955
1956         /* construct new value and store */
1957         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1958         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1959                                          set_volatile ? cons_volatile : cons_none);
1960         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1961         set_store(store_mem);
1962
1963         return value_masked;
1964 }
1965
1966 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1967                 ir_node *addr)
1968 {
1969         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1970         type_t   *type     = expression->base.type;
1971         ir_mode  *mode     = get_ir_mode_storage(type);
1972         ir_node  *mem      = get_store();
1973         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
1974         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1975         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1976
1977         load_res           = create_conv(dbgi, load_res, mode_int);
1978
1979         set_store(load_mem);
1980
1981         /* kill upper bits */
1982         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1983         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1984         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1985         ir_type   *entity_type  = get_entity_type(entity);
1986         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1987         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1988         assert(shift_bitsl >= 0);
1989         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1990         ir_node   *countl       = new_d_Const(dbgi, tvl);
1991         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1992
1993         long       shift_bitsr  = bitoffset + shift_bitsl;
1994         assert(shift_bitsr <= (long) machine_size);
1995         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1996         ir_node   *countr       = new_d_Const(dbgi, tvr);
1997         ir_node   *shiftr;
1998         if (mode_is_signed(mode)) {
1999                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2000         } else {
2001                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2002         }
2003
2004         return create_conv(dbgi, shiftr, mode);
2005 }
2006
2007 /* make sure the selected compound type is constructed */
2008 static void construct_select_compound(const select_expression_t *expression)
2009 {
2010         type_t *type = skip_typeref(expression->compound->base.type);
2011         if (is_type_pointer(type)) {
2012                 type = type->pointer.points_to;
2013         }
2014         (void) get_ir_type(type);
2015 }
2016
2017 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2018                                               ir_node *value, ir_node *addr)
2019 {
2020         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2021         type_t   *type = skip_typeref(expression->base.type);
2022
2023         if (!is_type_compound(type)) {
2024                 ir_mode  *mode = get_ir_mode_storage(type);
2025                 value          = create_conv(dbgi, value, mode);
2026                 value          = do_strict_conv(dbgi, value);
2027         }
2028
2029         if (expression->kind == EXPR_REFERENCE) {
2030                 const reference_expression_t *ref = &expression->reference;
2031
2032                 entity_t *entity = ref->entity;
2033                 assert(is_declaration(entity));
2034                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2035                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2036                         set_value(entity->variable.v.value_number, value);
2037                         return value;
2038                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2039                         set_value(entity->parameter.v.value_number, value);
2040                         return value;
2041                 }
2042         }
2043
2044         if (addr == NULL)
2045                 addr = expression_to_addr(expression);
2046         assert(addr != NULL);
2047
2048         if (expression->kind == EXPR_SELECT) {
2049                 const select_expression_t *select = &expression->select;
2050
2051                 construct_select_compound(select);
2052
2053                 entity_t *entity = select->compound_entry;
2054                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2055                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2056                         ir_entity *irentity = entity->compound_member.entity;
2057                         bool       set_volatile
2058                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2059                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2060                                                        set_volatile);
2061                         return value;
2062                 }
2063         }
2064
2065         assign_value(dbgi, addr, type, value);
2066         return value;
2067 }
2068
2069 static void set_value_for_expression(const expression_t *expression,
2070                                      ir_node *value)
2071 {
2072         set_value_for_expression_addr(expression, value, NULL);
2073 }
2074
2075 static ir_node *get_value_from_lvalue(const expression_t *expression,
2076                                       ir_node *addr)
2077 {
2078         if (expression->kind == EXPR_REFERENCE) {
2079                 const reference_expression_t *ref = &expression->reference;
2080
2081                 entity_t *entity = ref->entity;
2082                 assert(entity->kind == ENTITY_VARIABLE
2083                                 || entity->kind == ENTITY_PARAMETER);
2084                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2085                 int value_number;
2086                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2087                         value_number = entity->variable.v.value_number;
2088                         assert(addr == NULL);
2089                         type_t  *type = skip_typeref(expression->base.type);
2090                         ir_mode *mode = get_ir_mode_storage(type);
2091                         ir_node *res  = get_value(value_number, mode);
2092                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2093                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2094                         value_number = entity->parameter.v.value_number;
2095                         assert(addr == NULL);
2096                         type_t  *type = skip_typeref(expression->base.type);
2097                         ir_mode *mode = get_ir_mode_storage(type);
2098                         ir_node *res  = get_value(value_number, mode);
2099                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2100                 }
2101         }
2102
2103         assert(addr != NULL);
2104         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2105
2106         ir_node *value;
2107         if (expression->kind == EXPR_SELECT &&
2108             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2109             construct_select_compound(&expression->select);
2110                 value = bitfield_extract_to_firm(&expression->select, addr);
2111         } else {
2112                 value = deref_address(dbgi, expression->base.type, addr);
2113         }
2114
2115         return value;
2116 }
2117
2118
2119 static ir_node *create_incdec(const unary_expression_t *expression)
2120 {
2121         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2122         const expression_t *value_expr = expression->value;
2123         ir_node            *addr       = expression_to_addr(value_expr);
2124         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2125
2126         type_t  *type = skip_typeref(expression->base.type);
2127         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2128
2129         ir_node *offset;
2130         if (is_type_pointer(type)) {
2131                 pointer_type_t *pointer_type = &type->pointer;
2132                 offset                       = get_type_size(pointer_type->points_to);
2133         } else {
2134                 assert(is_type_arithmetic(type));
2135                 offset = new_Const(get_mode_one(mode));
2136         }
2137
2138         ir_node *result;
2139         ir_node *store_value;
2140         switch(expression->base.kind) {
2141         case EXPR_UNARY_POSTFIX_INCREMENT:
2142                 result      = value;
2143                 store_value = new_d_Add(dbgi, value, offset, mode);
2144                 break;
2145         case EXPR_UNARY_POSTFIX_DECREMENT:
2146                 result      = value;
2147                 store_value = new_d_Sub(dbgi, value, offset, mode);
2148                 break;
2149         case EXPR_UNARY_PREFIX_INCREMENT:
2150                 result      = new_d_Add(dbgi, value, offset, mode);
2151                 store_value = result;
2152                 break;
2153         case EXPR_UNARY_PREFIX_DECREMENT:
2154                 result      = new_d_Sub(dbgi, value, offset, mode);
2155                 store_value = result;
2156                 break;
2157         default:
2158                 panic("no incdec expr in create_incdec");
2159         }
2160
2161         set_value_for_expression_addr(value_expr, store_value, addr);
2162
2163         return result;
2164 }
2165
2166 static bool is_local_variable(expression_t *expression)
2167 {
2168         if (expression->kind != EXPR_REFERENCE)
2169                 return false;
2170         reference_expression_t *ref_expr = &expression->reference;
2171         entity_t               *entity   = ref_expr->entity;
2172         if (entity->kind != ENTITY_VARIABLE)
2173                 return false;
2174         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2175         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2176 }
2177
2178 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2179 {
2180         switch(kind) {
2181         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2182         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2183         case EXPR_BINARY_NOTEQUAL:
2184                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2185         case EXPR_BINARY_ISLESS:
2186         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2187         case EXPR_BINARY_ISLESSEQUAL:
2188         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2189         case EXPR_BINARY_ISGREATER:
2190         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2191         case EXPR_BINARY_ISGREATEREQUAL:
2192         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2193         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2194
2195         default:
2196                 break;
2197         }
2198         panic("trying to get pn_Cmp from non-comparison binexpr type");
2199 }
2200
2201 /**
2202  * Handle the assume optimizer hint: check if a Confirm
2203  * node can be created.
2204  *
2205  * @param dbi    debug info
2206  * @param expr   the IL assume expression
2207  *
2208  * we support here only some simple cases:
2209  *  - var rel const
2210  *  - const rel val
2211  *  - var rel var
2212  */
2213 static ir_node *handle_assume_compare(dbg_info *dbi,
2214                                       const binary_expression_t *expression)
2215 {
2216         expression_t *op1 = expression->left;
2217         expression_t *op2 = expression->right;
2218         entity_t     *var2, *var = NULL;
2219         ir_node      *res = NULL;
2220         pn_Cmp        cmp_val;
2221
2222         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2223
2224         if (is_local_variable(op1) && is_local_variable(op2)) {
2225         var  = op1->reference.entity;
2226             var2 = op2->reference.entity;
2227
2228                 type_t  *const type = skip_typeref(var->declaration.type);
2229                 ir_mode *const mode = get_ir_mode_storage(type);
2230
2231                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2232                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2233
2234                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2235                 set_value(var2->variable.v.value_number, res);
2236
2237                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2238                 set_value(var->variable.v.value_number, res);
2239
2240                 return res;
2241         }
2242
2243         expression_t *con;
2244         if (is_local_variable(op1) && is_constant_expression(op2)) {
2245                 var = op1->reference.entity;
2246                 con = op2;
2247         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2248                 cmp_val = get_inversed_pnc(cmp_val);
2249                 var = op2->reference.entity;
2250                 con = op1;
2251         }
2252
2253         if (var != NULL) {
2254                 type_t  *const type = skip_typeref(var->declaration.type);
2255                 ir_mode *const mode = get_ir_mode_storage(type);
2256
2257                 res = get_value(var->variable.v.value_number, mode);
2258                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2259                 set_value(var->variable.v.value_number, res);
2260         }
2261         return res;
2262 }
2263
2264 /**
2265  * Handle the assume optimizer hint.
2266  *
2267  * @param dbi    debug info
2268  * @param expr   the IL assume expression
2269  */
2270 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2271 {
2272         switch(expression->kind) {
2273         case EXPR_BINARY_EQUAL:
2274         case EXPR_BINARY_NOTEQUAL:
2275         case EXPR_BINARY_LESS:
2276         case EXPR_BINARY_LESSEQUAL:
2277         case EXPR_BINARY_GREATER:
2278         case EXPR_BINARY_GREATEREQUAL:
2279                 return handle_assume_compare(dbi, &expression->binary);
2280         default:
2281                 return NULL;
2282         }
2283 }
2284
2285 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2286 {
2287         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2288         type_t   *type = skip_typeref(expression->base.type);
2289
2290         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2291                 return expression_to_addr(expression->value);
2292
2293         const expression_t *value = expression->value;
2294
2295         switch(expression->base.kind) {
2296         case EXPR_UNARY_NEGATE: {
2297                 ir_node *value_node = expression_to_firm(value);
2298                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2299                 return new_d_Minus(dbgi, value_node, mode);
2300         }
2301         case EXPR_UNARY_PLUS:
2302                 return expression_to_firm(value);
2303         case EXPR_UNARY_BITWISE_NEGATE: {
2304                 ir_node *value_node = expression_to_firm(value);
2305                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2306                 return new_d_Not(dbgi, value_node, mode);
2307         }
2308         case EXPR_UNARY_NOT: {
2309                 ir_node *value_node = _expression_to_firm(value);
2310                 value_node          = create_conv(dbgi, value_node, mode_b);
2311                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2312                 return res;
2313         }
2314         case EXPR_UNARY_DEREFERENCE: {
2315                 ir_node *value_node = expression_to_firm(value);
2316                 type_t  *value_type = skip_typeref(value->base.type);
2317                 assert(is_type_pointer(value_type));
2318                 type_t  *points_to  = value_type->pointer.points_to;
2319                 return deref_address(dbgi, points_to, value_node);
2320         }
2321         case EXPR_UNARY_POSTFIX_INCREMENT:
2322         case EXPR_UNARY_POSTFIX_DECREMENT:
2323         case EXPR_UNARY_PREFIX_INCREMENT:
2324         case EXPR_UNARY_PREFIX_DECREMENT:
2325                 return create_incdec(expression);
2326         case EXPR_UNARY_CAST: {
2327                 ir_node *value_node = expression_to_firm(value);
2328                 if (is_type_scalar(type)) {
2329                         ir_mode *mode       = get_ir_mode_storage(type);
2330                         ir_node *node       = create_conv(dbgi, value_node, mode);
2331                         node                = do_strict_conv(dbgi, node);
2332                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2333                         node                = create_conv(dbgi, node, mode_arith);
2334                         return node;
2335                 } else {
2336                         /* make sure firm type is constructed */
2337                         (void) get_ir_type(type);
2338                         return value_node;
2339                 }
2340         }
2341         case EXPR_UNARY_CAST_IMPLICIT: {
2342                 ir_node *value_node = expression_to_firm(value);
2343                 if (is_type_scalar(type)) {
2344                         ir_mode *mode       = get_ir_mode_storage(type);
2345                         ir_node *res        = create_conv(dbgi, value_node, mode);
2346                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2347                         res                 = create_conv(dbgi, res, mode_arith);
2348                         return res;
2349                 } else {
2350                         return value_node;
2351                 }
2352         }
2353         case EXPR_UNARY_ASSUME:
2354                 if (firm_opt.confirm)
2355                         return handle_assume(dbgi, value);
2356                 else
2357                         return NULL;
2358
2359         default:
2360                 break;
2361         }
2362         panic("invalid UNEXPR type found");
2363 }
2364
2365 /**
2366  * produces a 0/1 depending of the value of a mode_b node
2367  */
2368 static ir_node *produce_condition_result(const expression_t *expression,
2369                                          ir_mode *mode, dbg_info *dbgi)
2370 {
2371         ir_node *cur_block = get_cur_block();
2372
2373         ir_node *one_block = new_immBlock();
2374         set_cur_block(one_block);
2375         ir_node *one       = new_Const(get_mode_one(mode));
2376         ir_node *jmp_one   = new_d_Jmp(dbgi);
2377
2378         ir_node *zero_block = new_immBlock();
2379         set_cur_block(zero_block);
2380         ir_node *zero       = new_Const(get_mode_null(mode));
2381         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2382
2383         set_cur_block(cur_block);
2384         create_condition_evaluation(expression, one_block, zero_block);
2385         mature_immBlock(one_block);
2386         mature_immBlock(zero_block);
2387
2388         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2389         new_Block(2, in_cf);
2390
2391         ir_node *in[2] = { one, zero };
2392         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2393
2394         return val;
2395 }
2396
2397 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2398                 ir_node *value, type_t *type)
2399 {
2400         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2401         assert(is_type_pointer(type));
2402         pointer_type_t *const pointer_type = &type->pointer;
2403         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2404         ir_node        *      elem_size    = get_type_size(points_to);
2405         elem_size                          = create_conv(dbgi, elem_size, mode);
2406         value                              = create_conv(dbgi, value,     mode);
2407         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2408         return mul;
2409 }
2410
2411 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2412                           ir_node *left, ir_node *right)
2413 {
2414         ir_mode  *mode;
2415         type_t   *type_left  = skip_typeref(expression->left->base.type);
2416         type_t   *type_right = skip_typeref(expression->right->base.type);
2417
2418         expression_kind_t kind = expression->base.kind;
2419
2420         switch (kind) {
2421         case EXPR_BINARY_SHIFTLEFT:
2422         case EXPR_BINARY_SHIFTRIGHT:
2423         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2424         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2425                 mode  = get_irn_mode(left);
2426                 right = create_conv(dbgi, right, mode_uint);
2427                 break;
2428
2429         case EXPR_BINARY_SUB:
2430                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2431                         const pointer_type_t *const ptr_type = &type_left->pointer;
2432
2433                         mode = get_ir_mode_arithmetic(expression->base.type);
2434                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2435                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2436                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2437                         ir_node *const no_mem    = new_NoMem();
2438                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2439                                                                                                    mode, op_pin_state_floats);
2440                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2441                 }
2442                 /* fallthrough */
2443         case EXPR_BINARY_SUB_ASSIGN:
2444                 if (is_type_pointer(type_left)) {
2445                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2446                         mode  = get_ir_mode_arithmetic(type_left);
2447                         break;
2448                 }
2449                 goto normal_node;
2450
2451         case EXPR_BINARY_ADD:
2452         case EXPR_BINARY_ADD_ASSIGN:
2453                 if (is_type_pointer(type_left)) {
2454                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2455                         mode  = get_ir_mode_arithmetic(type_left);
2456                         break;
2457                 } else if (is_type_pointer(type_right)) {
2458                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2459                         mode  = get_ir_mode_arithmetic(type_right);
2460                         break;
2461                 }
2462                 goto normal_node;
2463
2464         default:
2465 normal_node:
2466                 mode = get_ir_mode_arithmetic(type_right);
2467                 left = create_conv(dbgi, left, mode);
2468                 break;
2469         }
2470
2471         switch (kind) {
2472         case EXPR_BINARY_ADD_ASSIGN:
2473         case EXPR_BINARY_ADD:
2474                 return new_d_Add(dbgi, left, right, mode);
2475         case EXPR_BINARY_SUB_ASSIGN:
2476         case EXPR_BINARY_SUB:
2477                 return new_d_Sub(dbgi, left, right, mode);
2478         case EXPR_BINARY_MUL_ASSIGN:
2479         case EXPR_BINARY_MUL:
2480                 return new_d_Mul(dbgi, left, right, mode);
2481         case EXPR_BINARY_BITWISE_AND:
2482         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2483                 return new_d_And(dbgi, left, right, mode);
2484         case EXPR_BINARY_BITWISE_OR:
2485         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2486                 return new_d_Or(dbgi, left, right, mode);
2487         case EXPR_BINARY_BITWISE_XOR:
2488         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2489                 return new_d_Eor(dbgi, left, right, mode);
2490         case EXPR_BINARY_SHIFTLEFT:
2491         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2492                 return new_d_Shl(dbgi, left, right, mode);
2493         case EXPR_BINARY_SHIFTRIGHT:
2494         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2495                 if (mode_is_signed(mode)) {
2496                         return new_d_Shrs(dbgi, left, right, mode);
2497                 } else {
2498                         return new_d_Shr(dbgi, left, right, mode);
2499                 }
2500         case EXPR_BINARY_DIV:
2501         case EXPR_BINARY_DIV_ASSIGN: {
2502                 ir_node *pin = new_Pin(new_NoMem());
2503                 ir_node *op;
2504                 ir_node *res;
2505                 if (mode_is_float(mode)) {
2506                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2507                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2508                 } else {
2509                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2510                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2511                 }
2512                 return res;
2513         }
2514         case EXPR_BINARY_MOD:
2515         case EXPR_BINARY_MOD_ASSIGN: {
2516                 ir_node *pin = new_Pin(new_NoMem());
2517                 assert(!mode_is_float(mode));
2518                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2519                                          op_pin_state_floats);
2520                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2521                 return res;
2522         }
2523         default:
2524                 panic("unexpected expression kind");
2525         }
2526 }
2527
2528 static ir_node *create_lazy_op(const binary_expression_t *expression)
2529 {
2530         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2531         type_t   *type = skip_typeref(expression->base.type);
2532         ir_mode  *mode = get_ir_mode_arithmetic(type);
2533
2534         if (is_constant_expression(expression->left)) {
2535                 long val = fold_constant(expression->left);
2536                 expression_kind_t ekind = expression->base.kind;
2537                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2538                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2539                         if (val == 0) {
2540                                 return new_Const(get_mode_null(mode));
2541                         }
2542                 } else {
2543                         if (val != 0) {
2544                                 return new_Const(get_mode_one(mode));
2545                         }
2546                 }
2547
2548                 if (is_constant_expression(expression->right)) {
2549                         long const valr = fold_constant(expression->right);
2550                         return valr != 0 ?
2551                                 new_Const(get_mode_one(mode)) :
2552                                 new_Const(get_mode_null(mode));
2553                 }
2554
2555                 return produce_condition_result(expression->right, mode, dbgi);
2556         }
2557
2558         return produce_condition_result((const expression_t*) expression, mode,
2559                                         dbgi);
2560 }
2561
2562 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2563                                             ir_node *right, ir_mode *mode);
2564
2565 static ir_node *create_assign_binop(const binary_expression_t *expression)
2566 {
2567         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2568         const expression_t *left_expr = expression->left;
2569         type_t             *type      = skip_typeref(left_expr->base.type);
2570         ir_mode            *left_mode = get_ir_mode_storage(type);
2571         ir_node            *right     = expression_to_firm(expression->right);
2572         ir_node            *left_addr = expression_to_addr(left_expr);
2573         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2574         ir_node            *result    = create_op(dbgi, expression, left, right);
2575
2576         result = create_conv(dbgi, result, left_mode);
2577         result = do_strict_conv(dbgi, result);
2578
2579         result = set_value_for_expression_addr(left_expr, result, left_addr);
2580
2581         if (!is_type_compound(type)) {
2582                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2583                 result = create_conv(dbgi, result, mode_arithmetic);
2584         }
2585         return result;
2586 }
2587
2588 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2589 {
2590         expression_kind_t kind = expression->base.kind;
2591
2592         switch(kind) {
2593         case EXPR_BINARY_EQUAL:
2594         case EXPR_BINARY_NOTEQUAL:
2595         case EXPR_BINARY_LESS:
2596         case EXPR_BINARY_LESSEQUAL:
2597         case EXPR_BINARY_GREATER:
2598         case EXPR_BINARY_GREATEREQUAL:
2599         case EXPR_BINARY_ISGREATER:
2600         case EXPR_BINARY_ISGREATEREQUAL:
2601         case EXPR_BINARY_ISLESS:
2602         case EXPR_BINARY_ISLESSEQUAL:
2603         case EXPR_BINARY_ISLESSGREATER:
2604         case EXPR_BINARY_ISUNORDERED: {
2605                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2606                 ir_node *left  = expression_to_firm(expression->left);
2607                 ir_node *right = expression_to_firm(expression->right);
2608                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2609                 long     pnc   = get_pnc(kind, expression->left->base.type);
2610                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2611                 return proj;
2612         }
2613         case EXPR_BINARY_ASSIGN: {
2614                 ir_node *addr  = expression_to_addr(expression->left);
2615                 ir_node *right = expression_to_firm(expression->right);
2616                 ir_node *res
2617                         = set_value_for_expression_addr(expression->left, right, addr);
2618
2619                 type_t  *type            = skip_typeref(expression->base.type);
2620                 if (!is_type_compound(type)) {
2621                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2622                         res                      = create_conv(NULL, res, mode_arithmetic);
2623                 }
2624                 return res;
2625         }
2626         case EXPR_BINARY_ADD:
2627         case EXPR_BINARY_SUB:
2628         case EXPR_BINARY_MUL:
2629         case EXPR_BINARY_DIV:
2630         case EXPR_BINARY_MOD:
2631         case EXPR_BINARY_BITWISE_AND:
2632         case EXPR_BINARY_BITWISE_OR:
2633         case EXPR_BINARY_BITWISE_XOR:
2634         case EXPR_BINARY_SHIFTLEFT:
2635         case EXPR_BINARY_SHIFTRIGHT:
2636         {
2637                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2638                 ir_node  *left  = expression_to_firm(expression->left);
2639                 ir_node  *right = expression_to_firm(expression->right);
2640                 return create_op(dbgi, expression, left, right);
2641         }
2642         case EXPR_BINARY_LOGICAL_AND:
2643         case EXPR_BINARY_LOGICAL_OR:
2644                 return create_lazy_op(expression);
2645         case EXPR_BINARY_COMMA:
2646                 /* create side effects of left side */
2647                 (void) expression_to_firm(expression->left);
2648                 return _expression_to_firm(expression->right);
2649
2650         case EXPR_BINARY_ADD_ASSIGN:
2651         case EXPR_BINARY_SUB_ASSIGN:
2652         case EXPR_BINARY_MUL_ASSIGN:
2653         case EXPR_BINARY_MOD_ASSIGN:
2654         case EXPR_BINARY_DIV_ASSIGN:
2655         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2656         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2657         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2658         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2659         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2660                 return create_assign_binop(expression);
2661         default:
2662                 panic("TODO binexpr type");
2663         }
2664 }
2665
2666 static ir_node *array_access_addr(const array_access_expression_t *expression)
2667 {
2668         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2669         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2670         ir_node  *offset      = expression_to_firm(expression->index);
2671         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2672         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2673         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2674
2675         return result;
2676 }
2677
2678 static ir_node *array_access_to_firm(
2679                 const array_access_expression_t *expression)
2680 {
2681         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2682         ir_node  *addr   = array_access_addr(expression);
2683         type_t   *type   = revert_automatic_type_conversion(
2684                         (const expression_t*) expression);
2685         type             = skip_typeref(type);
2686
2687         return deref_address(dbgi, type, addr);
2688 }
2689
2690 static long get_offsetof_offset(const offsetof_expression_t *expression)
2691 {
2692         type_t *orig_type = expression->type;
2693         long    offset    = 0;
2694
2695         designator_t *designator = expression->designator;
2696         for ( ; designator != NULL; designator = designator->next) {
2697                 type_t *type = skip_typeref(orig_type);
2698                 /* be sure the type is constructed */
2699                 (void) get_ir_type(type);
2700
2701                 if (designator->symbol != NULL) {
2702                         assert(is_type_compound(type));
2703                         symbol_t *symbol = designator->symbol;
2704
2705                         compound_t *compound = type->compound.compound;
2706                         entity_t   *iter     = compound->members.entities;
2707                         for ( ; iter != NULL; iter = iter->base.next) {
2708                                 if (iter->base.symbol == symbol) {
2709                                         break;
2710                                 }
2711                         }
2712                         assert(iter != NULL);
2713
2714                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2715                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2716                         offset += get_entity_offset(iter->compound_member.entity);
2717
2718                         orig_type = iter->declaration.type;
2719                 } else {
2720                         expression_t *array_index = designator->array_index;
2721                         assert(designator->array_index != NULL);
2722                         assert(is_type_array(type));
2723
2724                         long index         = fold_constant(array_index);
2725                         ir_type *arr_type  = get_ir_type(type);
2726                         ir_type *elem_type = get_array_element_type(arr_type);
2727                         long     elem_size = get_type_size_bytes(elem_type);
2728
2729                         offset += index * elem_size;
2730
2731                         orig_type = type->array.element_type;
2732                 }
2733         }
2734
2735         return offset;
2736 }
2737
2738 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2739 {
2740         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2741         long      offset = get_offsetof_offset(expression);
2742         tarval   *tv     = new_tarval_from_long(offset, mode);
2743         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2744
2745         return new_d_Const(dbgi, tv);
2746 }
2747
2748 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2749                                      ir_entity *entity, type_t *type);
2750
2751 static ir_node *compound_literal_to_firm(
2752                 const compound_literal_expression_t *expression)
2753 {
2754         type_t *type = expression->type;
2755
2756         /* create an entity on the stack */
2757         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2758
2759         ident     *const id     = id_unique("CompLit.%u");
2760         ir_type   *const irtype = get_ir_type(type);
2761         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2762         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2763         set_entity_ld_ident(entity, id);
2764
2765         set_entity_variability(entity, variability_uninitialized);
2766
2767         /* create initialisation code */
2768         initializer_t *initializer = expression->initializer;
2769         create_local_initializer(initializer, dbgi, entity, type);
2770
2771         /* create a sel for the compound literal address */
2772         ir_node *frame = get_local_frame(entity);
2773         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2774         return sel;
2775 }
2776
2777 /**
2778  * Transform a sizeof expression into Firm code.
2779  */
2780 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2781 {
2782         type_t *type = expression->type;
2783         if (type == NULL) {
2784                 type = expression->tp_expression->base.type;
2785                 assert(type != NULL);
2786         }
2787
2788         type = skip_typeref(type);
2789         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
2790         if (is_type_array(type) && type->array.is_vla
2791                         && expression->tp_expression != NULL) {
2792                 expression_to_firm(expression->tp_expression);
2793         }
2794
2795         return get_type_size(type);
2796 }
2797
2798 static entity_t *get_expression_entity(const expression_t *expression)
2799 {
2800         if (expression->kind != EXPR_REFERENCE)
2801                 return NULL;
2802
2803         return expression->reference.entity;
2804 }
2805
2806 /**
2807  * Transform an alignof expression into Firm code.
2808  */
2809 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2810 {
2811         ir_entity *irentity = NULL;
2812
2813         const expression_t *tp_expression = expression->tp_expression;
2814         if (tp_expression != NULL) {
2815                 entity_t *entity = get_expression_entity(tp_expression);
2816                 if (entity != NULL && is_declaration(entity)) {
2817                         switch (entity->declaration.kind) {
2818                         case DECLARATION_KIND_UNKNOWN:
2819                                 panic("unknown entity reference found");
2820                         case DECLARATION_KIND_COMPOUND_MEMBER:
2821                                 irentity = entity->compound_member.entity;
2822                                 break;
2823                         case DECLARATION_KIND_GLOBAL_VARIABLE:
2824                         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2825                                 irentity = entity->variable.v.entity;
2826                                 break;
2827                         case DECLARATION_KIND_PARAMETER_ENTITY:
2828                                 irentity = entity->parameter.v.entity;
2829                                 break;
2830                         case DECLARATION_KIND_FUNCTION:
2831                         case DECLARATION_KIND_INNER_FUNCTION:
2832                                 irentity = entity->function.entity;
2833                                 break;
2834                         case DECLARATION_KIND_PARAMETER:
2835                         case DECLARATION_KIND_LOCAL_VARIABLE:
2836                         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2837                                 break;
2838                         }
2839                 }
2840         }
2841
2842         ir_type *irtype;
2843         if (irentity != NULL) {
2844                 irtype = get_entity_type(irentity);
2845         } else {
2846                 type_t *type = expression->type;
2847                 irtype = get_ir_type(type);
2848         }
2849
2850         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2851         symconst_symbol sym;
2852         sym.type_p = irtype;
2853         return new_SymConst(mode, sym, symconst_type_align);
2854 }
2855
2856 static void init_ir_types(void);
2857
2858 long fold_constant(const expression_t *expression)
2859 {
2860         assert(is_type_valid(skip_typeref(expression->base.type)));
2861
2862         bool constant_folding_old = constant_folding;
2863         constant_folding = true;
2864
2865         init_ir_types();
2866
2867         assert(is_constant_expression(expression));
2868
2869         ir_graph *old_current_ir_graph = current_ir_graph;
2870         current_ir_graph = get_const_code_irg();
2871
2872         ir_node *cnst = expression_to_firm(expression);
2873         current_ir_graph = old_current_ir_graph;
2874
2875         if (!is_Const(cnst)) {
2876                 panic("couldn't fold constant");
2877         }
2878
2879         tarval *tv = get_Const_tarval(cnst);
2880         if (!tarval_is_long(tv)) {
2881                 panic("result of constant folding is not integer");
2882         }
2883
2884         constant_folding = constant_folding_old;
2885
2886         return get_tarval_long(tv);
2887 }
2888
2889 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2890 {
2891         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2892
2893         /* first try to fold a constant condition */
2894         if (is_constant_expression(expression->condition)) {
2895                 long val = fold_constant(expression->condition);
2896                 if (val) {
2897                         expression_t *true_expression = expression->true_expression;
2898                         if (true_expression == NULL)
2899                                 true_expression = expression->condition;
2900                         return expression_to_firm(true_expression);
2901                 } else {
2902                         return expression_to_firm(expression->false_expression);
2903                 }
2904         }
2905
2906         ir_node *cur_block   = get_cur_block();
2907
2908         /* create the true block */
2909         ir_node *true_block  = new_immBlock();
2910         set_cur_block(true_block);
2911
2912         ir_node *true_val = expression->true_expression != NULL ?
2913                 expression_to_firm(expression->true_expression) : NULL;
2914         ir_node *true_jmp = new_Jmp();
2915
2916         /* create the false block */
2917         ir_node *false_block = new_immBlock();
2918         set_cur_block(false_block);
2919
2920         ir_node *false_val = expression_to_firm(expression->false_expression);
2921         ir_node *false_jmp = new_Jmp();
2922
2923         /* create the condition evaluation */
2924         set_cur_block(cur_block);
2925         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2926         if (expression->true_expression == NULL) {
2927                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
2928                         true_val = cond_expr;
2929                 } else {
2930                         /* Condition ended with a short circuit (&&, ||, !) operation or a
2931                          * comparison.  Generate a "1" as value for the true branch. */
2932                         true_val = new_Const(get_mode_one(mode_Is));
2933                 }
2934         }
2935         mature_immBlock(true_block);
2936         mature_immBlock(false_block);
2937
2938         /* create the common block */
2939         ir_node *in_cf[2] = { true_jmp, false_jmp };
2940         new_Block(2, in_cf);
2941
2942         /* TODO improve static semantics, so either both or no values are NULL */
2943         if (true_val == NULL || false_val == NULL)
2944                 return NULL;
2945
2946         ir_node *in[2] = { true_val, false_val };
2947         ir_mode *mode  = get_irn_mode(true_val);
2948         assert(get_irn_mode(false_val) == mode);
2949         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2950
2951         return val;
2952 }
2953
2954 /**
2955  * Returns an IR-node representing the address of a field.
2956  */
2957 static ir_node *select_addr(const select_expression_t *expression)
2958 {
2959         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2960
2961         construct_select_compound(expression);
2962
2963         ir_node *compound_addr = expression_to_firm(expression->compound);
2964
2965         entity_t *entry = expression->compound_entry;
2966         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2967         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2968
2969         if (constant_folding) {
2970                 ir_mode *mode = get_irn_mode(compound_addr);
2971                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2972                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
2973                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2974         } else {
2975                 ir_entity *irentity = entry->compound_member.entity;
2976                 assert(irentity != NULL);
2977                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2978         }
2979 }
2980
2981 static ir_node *select_to_firm(const select_expression_t *expression)
2982 {
2983         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2984         ir_node  *addr = select_addr(expression);
2985         type_t   *type = revert_automatic_type_conversion(
2986                         (const expression_t*) expression);
2987         type           = skip_typeref(type);
2988
2989         entity_t *entry      = expression->compound_entry;
2990         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2991         type_t   *entry_type = skip_typeref(entry->declaration.type);
2992
2993         if (entry_type->kind == TYPE_BITFIELD) {
2994                 return bitfield_extract_to_firm(expression, addr);
2995         }
2996
2997         return deref_address(dbgi, type, addr);
2998 }
2999
3000 /* Values returned by __builtin_classify_type. */
3001 typedef enum gcc_type_class
3002 {
3003         no_type_class = -1,
3004         void_type_class,
3005         integer_type_class,
3006         char_type_class,
3007         enumeral_type_class,
3008         boolean_type_class,
3009         pointer_type_class,
3010         reference_type_class,
3011         offset_type_class,
3012         real_type_class,
3013         complex_type_class,
3014         function_type_class,
3015         method_type_class,
3016         record_type_class,
3017         union_type_class,
3018         array_type_class,
3019         string_type_class,
3020         set_type_class,
3021         file_type_class,
3022         lang_type_class
3023 } gcc_type_class;
3024
3025 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3026 {
3027         type_t *type = expr->type_expression->base.type;
3028
3029         /* FIXME gcc returns different values depending on whether compiling C or C++
3030          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3031         gcc_type_class tc;
3032         for (;;) {
3033                 type = skip_typeref(type);
3034                 switch (type->kind) {
3035                         case TYPE_ATOMIC: {
3036                                 const atomic_type_t *const atomic_type = &type->atomic;
3037                                 switch (atomic_type->akind) {
3038                                         /* should not be reached */
3039                                         case ATOMIC_TYPE_INVALID:
3040                                                 tc = no_type_class;
3041                                                 goto make_const;
3042
3043                                         /* gcc cannot do that */
3044                                         case ATOMIC_TYPE_VOID:
3045                                                 tc = void_type_class;
3046                                                 goto make_const;
3047
3048                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3049                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3050                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3051                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3052                                         case ATOMIC_TYPE_SHORT:
3053                                         case ATOMIC_TYPE_USHORT:
3054                                         case ATOMIC_TYPE_INT:
3055                                         case ATOMIC_TYPE_UINT:
3056                                         case ATOMIC_TYPE_LONG:
3057                                         case ATOMIC_TYPE_ULONG:
3058                                         case ATOMIC_TYPE_LONGLONG:
3059                                         case ATOMIC_TYPE_ULONGLONG:
3060                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3061                                                 tc = integer_type_class;
3062                                                 goto make_const;
3063
3064                                         case ATOMIC_TYPE_FLOAT:
3065                                         case ATOMIC_TYPE_DOUBLE:
3066                                         case ATOMIC_TYPE_LONG_DOUBLE:
3067                                                 tc = real_type_class;
3068                                                 goto make_const;
3069                                 }
3070                                 panic("Unexpected atomic type in classify_type_to_firm().");
3071                         }
3072
3073                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3074                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3075                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3076                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3077                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3078                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3079                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3080                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3081
3082                         /* gcc handles this as integer */
3083                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3084
3085                         /* gcc classifies the referenced type */
3086                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3087
3088                         case TYPE_BUILTIN:
3089                         /* typedef/typeof should be skipped already */
3090                         case TYPE_TYPEDEF:
3091                         case TYPE_TYPEOF:
3092                         case TYPE_INVALID:
3093                         case TYPE_ERROR:
3094                                 break;
3095                 }
3096                 panic("unexpected TYPE classify_type_to_firm().");
3097         }
3098
3099 make_const:;
3100         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3101         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3102         return new_d_Const(dbgi, tv);
3103 }
3104
3105 static ir_node *function_name_to_firm(
3106                 const funcname_expression_t *const expr)
3107 {
3108         switch(expr->kind) {
3109         case FUNCNAME_FUNCTION:
3110         case FUNCNAME_PRETTY_FUNCTION:
3111         case FUNCNAME_FUNCDNAME:
3112                 if (current_function_name == NULL) {
3113                         const source_position_t *const src_pos = &expr->base.source_position;
3114                         const char    *name  = current_function_entity->base.symbol->string;
3115                         const string_t string = { name, strlen(name) + 1 };
3116                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3117                 }
3118                 return current_function_name;
3119         case FUNCNAME_FUNCSIG:
3120                 if (current_funcsig == NULL) {
3121                         const source_position_t *const src_pos = &expr->base.source_position;
3122                         ir_entity *ent = get_irg_entity(current_ir_graph);
3123                         const char *const name = get_entity_ld_name(ent);
3124                         const string_t string = { name, strlen(name) + 1 };
3125                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3126                 }
3127                 return current_funcsig;
3128         }
3129         panic("Unsupported function name");
3130 }
3131
3132 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3133 {
3134         statement_t *statement = expr->statement;
3135
3136         assert(statement->kind == STATEMENT_COMPOUND);
3137         return compound_statement_to_firm(&statement->compound);
3138 }
3139
3140 static ir_node *va_start_expression_to_firm(
3141         const va_start_expression_t *const expr)
3142 {
3143         type_t    *const type        = current_function_entity->declaration.type;
3144         ir_type   *const method_type = get_ir_type(type);
3145         int        const n           = get_method_n_params(method_type) - 1;
3146         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3147         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
3148         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3149         ir_node   *const no_mem      = new_NoMem();
3150         ir_node   *const arg_sel     =
3151                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3152
3153         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
3154         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3155         set_value_for_expression(expr->ap, add);
3156
3157         return NULL;
3158 }
3159
3160 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3161 {
3162         type_t       *const type    = expr->base.type;
3163         expression_t *const ap_expr = expr->ap;
3164         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3165         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3166         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3167         ir_node      *const res     = deref_address(dbgi, type, ap);
3168
3169         ir_node      *const cnst    = get_type_size(expr->base.type);
3170         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
3171
3172         set_value_for_expression_addr(ap_expr, add, ap_addr);
3173
3174         return res;
3175 }
3176
3177 static ir_node *dereference_addr(const unary_expression_t *const expression)
3178 {
3179         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3180         return expression_to_firm(expression->value);
3181 }
3182
3183 /**
3184  * Returns a IR-node representing an lvalue of the given expression.
3185  */
3186 static ir_node *expression_to_addr(const expression_t *expression)
3187 {
3188         switch(expression->kind) {
3189         case EXPR_ARRAY_ACCESS:
3190                 return array_access_addr(&expression->array_access);
3191         case EXPR_CALL:
3192                 return call_expression_to_firm(&expression->call);
3193         case EXPR_COMPOUND_LITERAL:
3194                 return compound_literal_to_firm(&expression->compound_literal);
3195         case EXPR_REFERENCE:
3196                 return reference_addr(&expression->reference);
3197         case EXPR_SELECT:
3198                 return select_addr(&expression->select);
3199         case EXPR_UNARY_DEREFERENCE:
3200                 return dereference_addr(&expression->unary);
3201         default:
3202                 break;
3203         }
3204         panic("trying to get address of non-lvalue");
3205 }
3206
3207 static ir_node *builtin_constant_to_firm(
3208                 const builtin_constant_expression_t *expression)
3209 {
3210         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3211         long     v;
3212
3213         if (is_constant_expression(expression->value)) {
3214                 v = 1;
3215         } else {
3216                 v = 0;
3217         }
3218         return new_Const_long(mode, v);
3219 }
3220
3221 static ir_node *builtin_types_compatible_to_firm(
3222                 const builtin_types_compatible_expression_t *expression)
3223 {
3224         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3225         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3226         long     const value = types_compatible(left, right) ? 1 : 0;
3227         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3228         return new_Const_long(mode, value);
3229 }
3230
3231 static ir_node *get_label_block(label_t *label)
3232 {
3233         if (label->block != NULL)
3234                 return label->block;
3235
3236         /* beware: might be called from create initializer with current_ir_graph
3237          * set to const_code_irg. */
3238         ir_graph *rem    = current_ir_graph;
3239         current_ir_graph = current_function;
3240
3241         ir_node *block = new_immBlock();
3242
3243         label->block = block;
3244
3245         ARR_APP1(label_t *, all_labels, label);
3246
3247         current_ir_graph = rem;
3248         return block;
3249 }
3250
3251 /**
3252  * Pointer to a label.  This is used for the
3253  * GNU address-of-label extension.
3254  */
3255 static ir_node *label_address_to_firm(
3256                 const label_address_expression_t *label)
3257 {
3258         ir_node    *block = get_label_block(label->label);
3259         ir_label_t  nr    = get_Block_label(block);
3260
3261         if (nr == 0) {
3262                 nr = get_irp_next_label_nr();
3263                 set_Block_label(block, nr);
3264         }
3265         symconst_symbol value;
3266         value.label = nr;
3267         return new_SymConst(mode_P_code, value, symconst_label);
3268 }
3269
3270 /**
3271  * creates firm nodes for an expression. The difference between this function
3272  * and expression_to_firm is, that this version might produce mode_b nodes
3273  * instead of mode_Is.
3274  */
3275 static ir_node *_expression_to_firm(const expression_t *expression)
3276 {
3277 #ifndef NDEBUG
3278         if (!constant_folding) {
3279                 assert(!expression->base.transformed);
3280                 ((expression_t*) expression)->base.transformed = true;
3281         }
3282 #endif
3283
3284         switch (expression->kind) {
3285         case EXPR_CHARACTER_CONSTANT:
3286                 return character_constant_to_firm(&expression->conste);
3287         case EXPR_WIDE_CHARACTER_CONSTANT:
3288                 return wide_character_constant_to_firm(&expression->conste);
3289         case EXPR_CONST:
3290                 return const_to_firm(&expression->conste);
3291         case EXPR_STRING_LITERAL:
3292                 return string_literal_to_firm(&expression->string);
3293         case EXPR_WIDE_STRING_LITERAL:
3294                 return wide_string_literal_to_firm(&expression->wide_string);
3295         case EXPR_REFERENCE:
3296                 return reference_expression_to_firm(&expression->reference);
3297         case EXPR_REFERENCE_ENUM_VALUE:
3298                 return reference_expression_enum_value_to_firm(&expression->reference);
3299         case EXPR_CALL:
3300                 return call_expression_to_firm(&expression->call);
3301         EXPR_UNARY_CASES
3302                 return unary_expression_to_firm(&expression->unary);
3303         EXPR_BINARY_CASES
3304                 return binary_expression_to_firm(&expression->binary);
3305         case EXPR_ARRAY_ACCESS:
3306                 return array_access_to_firm(&expression->array_access);
3307         case EXPR_SIZEOF:
3308                 return sizeof_to_firm(&expression->typeprop);
3309         case EXPR_ALIGNOF:
3310                 return alignof_to_firm(&expression->typeprop);
3311         case EXPR_CONDITIONAL:
3312                 return conditional_to_firm(&expression->conditional);
3313         case EXPR_SELECT:
3314                 return select_to_firm(&expression->select);
3315         case EXPR_CLASSIFY_TYPE:
3316                 return classify_type_to_firm(&expression->classify_type);
3317         case EXPR_FUNCNAME:
3318                 return function_name_to_firm(&expression->funcname);
3319         case EXPR_STATEMENT:
3320                 return statement_expression_to_firm(&expression->statement);
3321         case EXPR_VA_START:
3322                 return va_start_expression_to_firm(&expression->va_starte);
3323         case EXPR_VA_ARG:
3324                 return va_arg_expression_to_firm(&expression->va_arge);
3325         case EXPR_BUILTIN_CONSTANT_P:
3326                 return builtin_constant_to_firm(&expression->builtin_constant);
3327         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3328                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3329         case EXPR_OFFSETOF:
3330                 return offsetof_to_firm(&expression->offsetofe);
3331         case EXPR_COMPOUND_LITERAL:
3332                 return compound_literal_to_firm(&expression->compound_literal);
3333         case EXPR_LABEL_ADDRESS:
3334                 return label_address_to_firm(&expression->label_address);
3335
3336         case EXPR_UNKNOWN:
3337         case EXPR_INVALID:
3338                 break;
3339         }
3340         panic("invalid expression found");
3341 }
3342
3343 /**
3344  * Check if a given expression is a GNU __builtin_expect() call.
3345  */
3346 static bool is_builtin_expect(const expression_t *expression)
3347 {
3348         if (expression->kind != EXPR_CALL)
3349                 return false;
3350
3351         expression_t *function = expression->call.function;
3352         if (function->kind != EXPR_REFERENCE)
3353                 return false;
3354         reference_expression_t *ref = &function->reference;
3355         if (ref->entity->kind == ENTITY_FUNCTION &&
3356             ref->entity->function.btk != bk_gnu_builtin_expect)
3357                 return false;
3358
3359         return true;
3360 }
3361
3362 static bool produces_mode_b(const expression_t *expression)
3363 {
3364         switch (expression->kind) {
3365         case EXPR_BINARY_EQUAL:
3366         case EXPR_BINARY_NOTEQUAL:
3367         case EXPR_BINARY_LESS:
3368         case EXPR_BINARY_LESSEQUAL:
3369         case EXPR_BINARY_GREATER:
3370         case EXPR_BINARY_GREATEREQUAL:
3371         case EXPR_BINARY_ISGREATER:
3372         case EXPR_BINARY_ISGREATEREQUAL:
3373         case EXPR_BINARY_ISLESS:
3374         case EXPR_BINARY_ISLESSEQUAL:
3375         case EXPR_BINARY_ISLESSGREATER:
3376         case EXPR_BINARY_ISUNORDERED:
3377         case EXPR_UNARY_NOT:
3378                 return true;
3379
3380         case EXPR_CALL:
3381                 if (is_builtin_expect(expression)) {
3382                         expression_t *argument = expression->call.arguments->expression;
3383                         return produces_mode_b(argument);
3384                 }
3385                 return false;
3386         case EXPR_BINARY_COMMA:
3387                 return produces_mode_b(expression->binary.right);
3388
3389         default:
3390                 return false;
3391         }
3392 }
3393
3394 static ir_node *expression_to_firm(const expression_t *expression)
3395 {
3396         if (!produces_mode_b(expression)) {
3397                 ir_node *res = _expression_to_firm(expression);
3398                 assert(res == NULL || get_irn_mode(res) != mode_b);
3399                 return res;
3400         }
3401
3402         if (is_constant_expression(expression)) {
3403                 ir_node *res  = _expression_to_firm(expression);
3404                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3405                 assert(is_Const(res));
3406                 if (is_Const_null(res)) {
3407                         return new_Const_long(mode, 0);
3408                 } else {
3409                         return new_Const_long(mode, 1);
3410                 }
3411         }
3412
3413         /* we have to produce a 0/1 from the mode_b expression */
3414         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3415         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3416         return produce_condition_result(expression, mode, dbgi);
3417 }
3418
3419 /**
3420  * create a short-circuit expression evaluation that tries to construct
3421  * efficient control flow structures for &&, || and ! expressions
3422  */
3423 static ir_node *create_condition_evaluation(const expression_t *expression,
3424                                             ir_node *true_block,
3425                                             ir_node *false_block)
3426 {
3427         switch(expression->kind) {
3428         case EXPR_UNARY_NOT: {
3429                 const unary_expression_t *unary_expression = &expression->unary;
3430                 create_condition_evaluation(unary_expression->value, false_block,
3431                                             true_block);
3432                 return NULL;
3433         }
3434         case EXPR_BINARY_LOGICAL_AND: {
3435                 const binary_expression_t *binary_expression = &expression->binary;
3436
3437                 ir_node *extra_block = new_immBlock();
3438                 create_condition_evaluation(binary_expression->left, extra_block,
3439                                             false_block);
3440                 mature_immBlock(extra_block);
3441                 set_cur_block(extra_block);
3442                 create_condition_evaluation(binary_expression->right, true_block,
3443                                             false_block);
3444                 return NULL;
3445         }
3446         case EXPR_BINARY_LOGICAL_OR: {
3447                 const binary_expression_t *binary_expression = &expression->binary;
3448
3449                 ir_node *extra_block = new_immBlock();
3450                 create_condition_evaluation(binary_expression->left, true_block,
3451                                             extra_block);
3452                 mature_immBlock(extra_block);
3453                 set_cur_block(extra_block);
3454                 create_condition_evaluation(binary_expression->right, true_block,
3455                                             false_block);
3456                 return NULL;
3457         }
3458         default:
3459                 break;
3460         }
3461
3462         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3463         ir_node  *cond_expr  = _expression_to_firm(expression);
3464         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3465         ir_node  *cond       = new_d_Cond(dbgi, condition);
3466         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3467         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3468
3469         /* set branch prediction info based on __builtin_expect */
3470         if (is_builtin_expect(expression) && is_Cond(cond)) {
3471                 call_argument_t *argument = expression->call.arguments->next;
3472                 if (is_constant_expression(argument->expression)) {
3473                         long               cnst = fold_constant(argument->expression);
3474                         cond_jmp_predicate pred;
3475
3476                         if (cnst == 0) {
3477                                 pred = COND_JMP_PRED_FALSE;
3478                         } else {
3479                                 pred = COND_JMP_PRED_TRUE;
3480                         }
3481                         set_Cond_jmp_pred(cond, pred);
3482                 }
3483         }
3484
3485         add_immBlock_pred(true_block, true_proj);
3486         add_immBlock_pred(false_block, false_proj);
3487
3488         set_cur_block(NULL);
3489         return cond_expr;
3490 }
3491
3492
3493 static void create_variable_entity(entity_t *variable,
3494                                    declaration_kind_t declaration_kind,
3495                                    ir_type *parent_type)
3496 {
3497         assert(variable->kind == ENTITY_VARIABLE);
3498         type_t    *type = skip_typeref(variable->declaration.type);
3499         type            = get_aligned_type(type, variable->variable.alignment);
3500
3501         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3502         ir_type   *const irtype   = get_ir_type(type);
3503         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3504
3505         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3506
3507         handle_gnu_attributes_ent(irentity, variable);
3508
3509         variable->declaration.kind  = (unsigned char) declaration_kind;
3510         variable->variable.v.entity = irentity;
3511         set_entity_variability(irentity, variability_uninitialized);
3512         set_entity_ld_ident(irentity, create_ld_ident(variable));
3513
3514         if (parent_type == get_tls_type())
3515                 set_entity_allocation(irentity, allocation_automatic);
3516         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3517                 set_entity_allocation(irentity, allocation_static);
3518
3519         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3520                 set_entity_volatility(irentity, volatility_is_volatile);
3521         }
3522 }
3523
3524
3525 typedef struct type_path_entry_t type_path_entry_t;
3526 struct type_path_entry_t {
3527         type_t           *type;
3528         ir_initializer_t *initializer;
3529         size_t            index;
3530         entity_t         *compound_entry;
3531 };
3532
3533 typedef struct type_path_t type_path_t;
3534 struct type_path_t {
3535         type_path_entry_t *path;
3536         type_t            *top_type;
3537         bool               invalid;
3538 };
3539
3540 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3541 {
3542         size_t len = ARR_LEN(path->path);
3543
3544         for (size_t i = 0; i < len; ++i) {
3545                 const type_path_entry_t *entry = & path->path[i];
3546
3547                 type_t *type = skip_typeref(entry->type);
3548                 if (is_type_compound(type)) {
3549                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3550                 } else if (is_type_array(type)) {
3551                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3552                 } else {
3553                         fprintf(stderr, "-INVALID-");
3554                 }
3555         }
3556         fprintf(stderr, "  (");
3557         print_type(path->top_type);
3558         fprintf(stderr, ")");
3559 }
3560
3561 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3562 {
3563         size_t len = ARR_LEN(path->path);
3564         assert(len > 0);
3565         return & path->path[len-1];
3566 }
3567
3568 static type_path_entry_t *append_to_type_path(type_path_t *path)
3569 {
3570         size_t len = ARR_LEN(path->path);
3571         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3572
3573         type_path_entry_t *result = & path->path[len];
3574         memset(result, 0, sizeof(result[0]));
3575         return result;
3576 }
3577
3578 static size_t get_compound_member_count(const compound_type_t *type)
3579 {
3580         compound_t *compound  = type->compound;
3581         size_t      n_members = 0;
3582         entity_t   *member    = compound->members.entities;
3583         for ( ; member != NULL; member = member->base.next) {
3584                 ++n_members;
3585         }
3586
3587         return n_members;
3588 }
3589
3590 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3591 {
3592         type_t *orig_top_type = path->top_type;
3593         type_t *top_type      = skip_typeref(orig_top_type);
3594
3595         assert(is_type_compound(top_type) || is_type_array(top_type));
3596
3597         if (ARR_LEN(path->path) == 0) {
3598                 return NULL;
3599         } else {
3600                 type_path_entry_t *top         = get_type_path_top(path);
3601                 ir_initializer_t  *initializer = top->initializer;
3602                 return get_initializer_compound_value(initializer, top->index);
3603         }
3604 }
3605
3606 static void descend_into_subtype(type_path_t *path)
3607 {
3608         type_t *orig_top_type = path->top_type;
3609         type_t *top_type      = skip_typeref(orig_top_type);
3610
3611         assert(is_type_compound(top_type) || is_type_array(top_type));
3612
3613         ir_initializer_t *initializer = get_initializer_entry(path);
3614
3615         type_path_entry_t *top = append_to_type_path(path);
3616         top->type              = top_type;
3617
3618         size_t len;
3619
3620         if (is_type_compound(top_type)) {
3621                 compound_t *compound = top_type->compound.compound;
3622                 entity_t   *entry    = compound->members.entities;
3623
3624                 top->compound_entry = entry;
3625                 top->index          = 0;
3626                 len                 = get_compound_member_count(&top_type->compound);
3627                 if (entry != NULL) {
3628                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3629                         path->top_type = entry->declaration.type;
3630                 }
3631         } else {
3632                 assert(is_type_array(top_type));
3633                 assert(top_type->array.size > 0);
3634
3635                 top->index     = 0;
3636                 path->top_type = top_type->array.element_type;
3637                 len            = top_type->array.size;
3638         }
3639         if (initializer == NULL
3640                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3641                 initializer = create_initializer_compound(len);
3642                 /* we have to set the entry at the 2nd latest path entry... */
3643                 size_t path_len = ARR_LEN(path->path);
3644                 assert(path_len >= 1);
3645                 if (path_len > 1) {
3646                         type_path_entry_t *entry        = & path->path[path_len-2];
3647                         ir_initializer_t  *tinitializer = entry->initializer;
3648                         set_initializer_compound_value(tinitializer, entry->index,
3649                                                        initializer);
3650                 }
3651         }
3652         top->initializer = initializer;
3653 }
3654
3655 static void ascend_from_subtype(type_path_t *path)
3656 {
3657         type_path_entry_t *top = get_type_path_top(path);
3658
3659         path->top_type = top->type;
3660
3661         size_t len = ARR_LEN(path->path);
3662         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3663 }
3664
3665 static void walk_designator(type_path_t *path, const designator_t *designator)
3666 {
3667         /* designators start at current object type */
3668         ARR_RESIZE(type_path_entry_t, path->path, 1);
3669
3670         for ( ; designator != NULL; designator = designator->next) {
3671                 type_path_entry_t *top         = get_type_path_top(path);
3672                 type_t            *orig_type   = top->type;
3673                 type_t            *type        = skip_typeref(orig_type);
3674
3675                 if (designator->symbol != NULL) {
3676                         assert(is_type_compound(type));
3677                         size_t    index  = 0;
3678                         symbol_t *symbol = designator->symbol;
3679
3680                         compound_t *compound = type->compound.compound;
3681                         entity_t   *iter     = compound->members.entities;
3682                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3683                                 if (iter->base.symbol == symbol) {
3684                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3685                                         break;
3686                                 }
3687                         }
3688                         assert(iter != NULL);
3689
3690                         top->type           = orig_type;
3691                         top->compound_entry = iter;
3692                         top->index          = index;
3693                         orig_type           = iter->declaration.type;
3694                 } else {
3695                         expression_t *array_index = designator->array_index;
3696                         assert(designator->array_index != NULL);
3697                         assert(is_type_array(type));
3698
3699                         long index = fold_constant(array_index);
3700                         assert(index >= 0);
3701 #ifndef NDEBUG
3702                         if (type->array.size_constant) {
3703                                 long array_size = type->array.size;
3704                                 assert(index < array_size);
3705                         }
3706 #endif
3707
3708                         top->type  = orig_type;
3709                         top->index = (size_t) index;
3710                         orig_type  = type->array.element_type;
3711                 }
3712                 path->top_type = orig_type;
3713
3714                 if (designator->next != NULL) {
3715                         descend_into_subtype(path);
3716                 }
3717         }
3718
3719         path->invalid  = false;
3720 }
3721
3722 static void advance_current_object(type_path_t *path)
3723 {
3724         if (path->invalid) {
3725                 /* TODO: handle this... */
3726                 panic("invalid initializer in ast2firm (excessive elements)");
3727         }
3728
3729         type_path_entry_t *top = get_type_path_top(path);
3730
3731         type_t *type = skip_typeref(top->type);
3732         if (is_type_union(type)) {
3733                 top->compound_entry = NULL;
3734         } else if (is_type_struct(type)) {
3735                 entity_t *entry = top->compound_entry;
3736
3737                 top->index++;
3738                 entry               = entry->base.next;
3739                 top->compound_entry = entry;
3740                 if (entry != NULL) {
3741                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3742                         path->top_type = entry->declaration.type;
3743                         return;
3744                 }
3745         } else {
3746                 assert(is_type_array(type));
3747
3748                 top->index++;
3749                 if (!type->array.size_constant || top->index < type->array.size) {
3750                         return;
3751                 }
3752         }
3753
3754         /* we're past the last member of the current sub-aggregate, try if we
3755          * can ascend in the type hierarchy and continue with another subobject */
3756         size_t len = ARR_LEN(path->path);
3757
3758         if (len > 1) {
3759                 ascend_from_subtype(path);
3760                 advance_current_object(path);
3761         } else {
3762                 path->invalid = true;
3763         }
3764 }
3765
3766
3767 static ir_initializer_t *create_ir_initializer(
3768                 const initializer_t *initializer, type_t *type);
3769
3770 static ir_initializer_t *create_ir_initializer_value(
3771                 const initializer_value_t *initializer)
3772 {
3773         if (is_type_compound(initializer->value->base.type)) {
3774                 panic("initializer creation for compounds not implemented yet");
3775         }
3776         ir_node *value = expression_to_firm(initializer->value);
3777         type_t  *type  = initializer->value->base.type;
3778         ir_mode *mode  = get_ir_mode_storage(type);
3779         value          = create_conv(NULL, value, mode);
3780         return create_initializer_const(value);
3781 }
3782
3783 /** test wether type can be initialized by a string constant */
3784 static bool is_string_type(type_t *type)
3785 {
3786         type_t *inner;
3787         if (is_type_pointer(type)) {
3788                 inner = skip_typeref(type->pointer.points_to);
3789         } else if(is_type_array(type)) {
3790                 inner = skip_typeref(type->array.element_type);
3791         } else {
3792                 return false;
3793         }
3794
3795         return is_type_integer(inner);
3796 }
3797
3798 static ir_initializer_t *create_ir_initializer_list(
3799                 const initializer_list_t *initializer, type_t *type)
3800 {
3801         type_path_t path;
3802         memset(&path, 0, sizeof(path));
3803         path.top_type = type;
3804         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3805
3806         descend_into_subtype(&path);
3807
3808         for (size_t i = 0; i < initializer->len; ++i) {
3809                 const initializer_t *sub_initializer = initializer->initializers[i];
3810
3811                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3812                         walk_designator(&path, sub_initializer->designator.designator);
3813                         continue;
3814                 }
3815
3816                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3817                         /* we might have to descend into types until we're at a scalar
3818                          * type */
3819                         while(true) {
3820                                 type_t *orig_top_type = path.top_type;
3821                                 type_t *top_type      = skip_typeref(orig_top_type);
3822
3823                                 if (is_type_scalar(top_type))
3824                                         break;
3825                                 descend_into_subtype(&path);
3826                         }
3827                 } else if (sub_initializer->kind == INITIALIZER_STRING
3828                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3829                         /* we might have to descend into types until we're at a scalar
3830                          * type */
3831                         while (true) {
3832                                 type_t *orig_top_type = path.top_type;
3833                                 type_t *top_type      = skip_typeref(orig_top_type);
3834
3835                                 if (is_string_type(top_type))
3836                                         break;
3837                                 descend_into_subtype(&path);
3838                         }
3839                 }
3840
3841                 ir_initializer_t *sub_irinitializer
3842                         = create_ir_initializer(sub_initializer, path.top_type);
3843
3844                 size_t path_len = ARR_LEN(path.path);
3845                 assert(path_len >= 1);
3846                 type_path_entry_t *entry        = & path.path[path_len-1];
3847                 ir_initializer_t  *tinitializer = entry->initializer;
3848                 set_initializer_compound_value(tinitializer, entry->index,
3849                                                sub_irinitializer);
3850
3851                 advance_current_object(&path);
3852         }
3853
3854         assert(ARR_LEN(path.path) >= 1);
3855         ir_initializer_t *result = path.path[0].initializer;
3856         DEL_ARR_F(path.path);
3857
3858         return result;
3859 }
3860
3861 static ir_initializer_t *create_ir_initializer_string(
3862                 const initializer_string_t *initializer, type_t *type)
3863 {
3864         type = skip_typeref(type);
3865
3866         size_t            string_len    = initializer->string.size;
3867         assert(type->kind == TYPE_ARRAY);
3868         assert(type->array.size_constant);
3869         size_t            len           = type->array.size;
3870         ir_initializer_t *irinitializer = create_initializer_compound(len);
3871
3872         const char *string = initializer->string.begin;
3873         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3874
3875         for (size_t i = 0; i < len; ++i) {
3876                 char c = 0;
3877                 if (i < string_len)
3878                         c = string[i];
3879
3880                 tarval           *tv = new_tarval_from_long(c, mode);
3881                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3882
3883                 set_initializer_compound_value(irinitializer, i, char_initializer);
3884         }
3885
3886         return irinitializer;
3887 }
3888
3889 static ir_initializer_t *create_ir_initializer_wide_string(
3890                 const initializer_wide_string_t *initializer, type_t *type)
3891 {
3892         size_t            string_len    = initializer->string.size;
3893         assert(type->kind == TYPE_ARRAY);
3894         assert(type->array.size_constant);
3895         size_t            len           = type->array.size;
3896         ir_initializer_t *irinitializer = create_initializer_compound(len);
3897
3898         const wchar_rep_t *string = initializer->string.begin;
3899         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3900
3901         for (size_t i = 0; i < len; ++i) {
3902                 wchar_rep_t c = 0;
3903                 if (i < string_len) {
3904                         c = string[i];
3905                 }
3906                 tarval *tv = new_tarval_from_long(c, mode);
3907                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3908
3909                 set_initializer_compound_value(irinitializer, i, char_initializer);
3910         }
3911
3912         return irinitializer;
3913 }
3914
3915 static ir_initializer_t *create_ir_initializer(
3916                 const initializer_t *initializer, type_t *type)
3917 {
3918         switch(initializer->kind) {
3919                 case INITIALIZER_STRING:
3920                         return create_ir_initializer_string(&initializer->string, type);
3921
3922                 case INITIALIZER_WIDE_STRING:
3923                         return create_ir_initializer_wide_string(&initializer->wide_string,
3924                                                                  type);
3925
3926                 case INITIALIZER_LIST:
3927                         return create_ir_initializer_list(&initializer->list, type);
3928
3929                 case INITIALIZER_VALUE:
3930                         return create_ir_initializer_value(&initializer->value);
3931
3932                 case INITIALIZER_DESIGNATOR:
3933                         panic("unexpected designator initializer found");
3934         }
3935         panic("unknown initializer");
3936 }
3937
3938 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3939                 ir_node *base_addr)
3940 {
3941         if (is_atomic_type(type)) {
3942                 ir_mode *mode = get_type_mode(type);
3943                 tarval  *zero = get_mode_null(mode);
3944                 ir_node *cnst = new_d_Const(dbgi, zero);
3945
3946                 /* TODO: bitfields */
3947                 ir_node *mem    = get_store();
3948                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3949                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3950                 set_store(proj_m);
3951         } else {
3952                 assert(is_compound_type(type));
3953
3954                 int n_members;
3955                 if (is_Array_type(type)) {
3956                         assert(has_array_upper_bound(type, 0));
3957                         n_members = get_array_upper_bound_int(type, 0);
3958                 } else {
3959                         n_members = get_compound_n_members(type);
3960                 }
3961
3962                 for (int i = 0; i < n_members; ++i) {
3963                         ir_node *addr;
3964                         ir_type *irtype;
3965                         if (is_Array_type(type)) {
3966                                 ir_entity *entity   = get_array_element_entity(type);
3967                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3968                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3969                                 ir_node   *in[1]    = { cnst };
3970                                 irtype = get_array_element_type(type);
3971                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3972                         } else {
3973                                 ir_entity *member = get_compound_member(type, i);
3974
3975                                 irtype = get_entity_type(member);
3976                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3977                         }
3978
3979                         create_dynamic_null_initializer(irtype, dbgi, addr);
3980                 }
3981         }
3982 }
3983
3984 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3985                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3986 {
3987         switch(get_initializer_kind(initializer)) {
3988         case IR_INITIALIZER_NULL: {
3989                 create_dynamic_null_initializer(type, dbgi, base_addr);
3990                 return;
3991         }
3992         case IR_INITIALIZER_CONST: {
3993                 ir_node *node     = get_initializer_const_value(initializer);
3994                 ir_mode *mode     = get_irn_mode(node);
3995                 ir_type *ent_type = get_entity_type(entity);
3996
3997                 /* is it a bitfield type? */
3998                 if (is_Primitive_type(ent_type) &&
3999                                 get_primitive_base_type(ent_type) != NULL) {
4000                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4001                         return;
4002                 }
4003
4004                 assert(get_type_mode(type) == mode);
4005                 ir_node *mem    = get_store();
4006                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4007                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4008                 set_store(proj_m);
4009                 return;
4010         }
4011         case IR_INITIALIZER_TARVAL: {
4012                 tarval  *tv       = get_initializer_tarval_value(initializer);
4013                 ir_mode *mode     = get_tarval_mode(tv);
4014                 ir_node *cnst     = new_d_Const(dbgi, tv);
4015                 ir_type *ent_type = get_entity_type(entity);
4016
4017                 /* is it a bitfield type? */
4018                 if (is_Primitive_type(ent_type) &&
4019                                 get_primitive_base_type(ent_type) != NULL) {
4020                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4021                         return;
4022                 }
4023
4024                 assert(get_type_mode(type) == mode);
4025                 ir_node *mem    = get_store();
4026                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4027                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4028                 set_store(proj_m);
4029                 return;
4030         }
4031         case IR_INITIALIZER_COMPOUND: {
4032                 assert(is_compound_type(type));
4033                 int n_members;
4034                 if (is_Array_type(type)) {
4035                         assert(has_array_upper_bound(type, 0));
4036                         n_members = get_array_upper_bound_int(type, 0);
4037                 } else {
4038                         n_members = get_compound_n_members(type);
4039                 }
4040
4041                 if (get_initializer_compound_n_entries(initializer)
4042                                 != (unsigned) n_members)
4043                         panic("initializer doesn't match compound type");
4044
4045                 for (int i = 0; i < n_members; ++i) {
4046                         ir_node   *addr;
4047                         ir_type   *irtype;
4048                         ir_entity *sub_entity;
4049                         if (is_Array_type(type)) {
4050                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4051                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4052                                 ir_node   *in[1]    = { cnst };
4053                                 irtype     = get_array_element_type(type);
4054                                 sub_entity = get_array_element_entity(type);
4055                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4056                                                        sub_entity);
4057                         } else {
4058                                 sub_entity = get_compound_member(type, i);
4059                                 irtype     = get_entity_type(sub_entity);
4060                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4061                                                              sub_entity);
4062                         }
4063
4064                         ir_initializer_t *sub_init
4065                                 = get_initializer_compound_value(initializer, i);
4066
4067                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4068                                                        addr);
4069                 }
4070                 return;
4071         }
4072         }
4073
4074         panic("invalid IR_INITIALIZER found");
4075 }
4076
4077 static void create_dynamic_initializer(ir_initializer_t *initializer,
4078                 dbg_info *dbgi, ir_entity *entity)
4079 {
4080         ir_node *frame     = get_local_frame(entity);
4081         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4082         ir_type *type      = get_entity_type(entity);
4083
4084         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4085 }
4086
4087 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4088                                      ir_entity *entity, type_t *type)
4089 {
4090         ir_node *memory = get_store();
4091         ir_node *nomem  = new_NoMem();
4092         ir_node *frame  = get_irg_frame(current_ir_graph);
4093         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4094
4095         if (initializer->kind == INITIALIZER_VALUE) {
4096                 initializer_value_t *initializer_value = &initializer->value;
4097
4098                 ir_node *value = expression_to_firm(initializer_value->value);
4099                 type = skip_typeref(type);
4100                 assign_value(dbgi, addr, type, value);
4101                 return;
4102         }
4103
4104         if (!is_constant_initializer(initializer)) {
4105                 ir_initializer_t *irinitializer
4106                         = create_ir_initializer(initializer, type);
4107
4108                 create_dynamic_initializer(irinitializer, dbgi, entity);
4109                 return;
4110         }
4111
4112         /* create the ir_initializer */
4113         ir_graph *const old_current_ir_graph = current_ir_graph;
4114         current_ir_graph = get_const_code_irg();
4115
4116         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4117
4118         assert(current_ir_graph == get_const_code_irg());
4119         current_ir_graph = old_current_ir_graph;
4120
4121         /* create a "template" entity which is copied to the entity on the stack */
4122         ident     *const id          = id_unique("initializer.%u");
4123         ir_type   *const irtype      = get_ir_type(type);
4124         ir_type   *const global_type = get_glob_type();
4125         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4126         set_entity_ld_ident(init_entity, id);
4127
4128         set_entity_variability(init_entity, variability_initialized);
4129         set_entity_visibility(init_entity, visibility_local);
4130         set_entity_allocation(init_entity, allocation_static);
4131
4132         set_entity_initializer(init_entity, irinitializer);
4133
4134         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4135         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4136
4137         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4138         set_store(copyb_mem);
4139 }
4140
4141 static void create_initializer_local_variable_entity(entity_t *entity)
4142 {
4143         assert(entity->kind == ENTITY_VARIABLE);
4144         initializer_t *initializer = entity->variable.initializer;
4145         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4146         ir_entity     *irentity    = entity->variable.v.entity;
4147         type_t        *type        = entity->declaration.type;
4148
4149         type = get_aligned_type(type, entity->variable.alignment);
4150         create_local_initializer(initializer, dbgi, irentity, type);
4151 }
4152
4153 static void create_variable_initializer(entity_t *entity)
4154 {
4155         assert(entity->kind == ENTITY_VARIABLE);
4156         initializer_t *initializer = entity->variable.initializer;
4157         if (initializer == NULL)
4158                 return;
4159
4160         declaration_kind_t declaration_kind
4161                 = (declaration_kind_t) entity->declaration.kind;
4162         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4163                 create_initializer_local_variable_entity(entity);
4164                 return;
4165         }
4166
4167         type_t            *type = entity->declaration.type;
4168         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4169
4170         if (initializer->kind == INITIALIZER_VALUE) {
4171                 initializer_value_t *initializer_value = &initializer->value;
4172                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4173
4174                 ir_node *value = expression_to_firm(initializer_value->value);
4175
4176                 type_t  *type = initializer_value->value->base.type;
4177                 ir_mode *mode = get_ir_mode_storage(type);
4178                 value = create_conv(dbgi, value, mode);
4179                 value = do_strict_conv(dbgi, value);
4180
4181                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4182                         set_value(entity->variable.v.value_number, value);
4183                 } else {
4184                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4185
4186                         ir_entity *irentity = entity->variable.v.entity;
4187
4188                         if (tq & TYPE_QUALIFIER_CONST) {
4189                                 set_entity_variability(irentity, variability_constant);
4190                         } else {
4191                                 set_entity_variability(irentity, variability_initialized);
4192                         }
4193                         set_atomic_ent_value(irentity, value);
4194                 }
4195         } else {
4196                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4197                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4198
4199                 ir_entity        *irentity        = entity->variable.v.entity;
4200                 ir_initializer_t *irinitializer
4201                         = create_ir_initializer(initializer, type);
4202
4203                 if (tq & TYPE_QUALIFIER_CONST) {
4204                         set_entity_variability(irentity, variability_constant);
4205                 } else {
4206                         set_entity_variability(irentity, variability_initialized);
4207                 }
4208                 set_entity_initializer(irentity, irinitializer);
4209         }
4210 }
4211
4212 static void create_variable_length_array(entity_t *entity)
4213 {
4214         assert(entity->kind == ENTITY_VARIABLE);
4215         assert(entity->variable.initializer == NULL);
4216
4217         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4218         entity->variable.v.vla_base = NULL;
4219
4220         /* TODO: record VLA somewhere so we create the free node when we leave
4221          * it's scope */
4222 }
4223
4224 static void allocate_variable_length_array(entity_t *entity)
4225 {
4226         assert(entity->kind == ENTITY_VARIABLE);
4227         assert(entity->variable.initializer == NULL);
4228         assert(get_cur_block() != NULL);
4229
4230         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4231         type_t   *type      = entity->declaration.type;
4232         ir_type  *el_type   = get_ir_type(type->array.element_type);
4233
4234         /* make sure size_node is calculated */
4235         get_type_size(type);
4236         ir_node  *elems = type->array.size_node;
4237         ir_node  *mem   = get_store();
4238         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4239
4240         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4241         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4242         set_store(proj_m);
4243
4244         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4245         entity->variable.v.vla_base = addr;
4246 }
4247
4248 /**
4249  * Creates a Firm local variable from a declaration.
4250  */
4251 static void create_local_variable(entity_t *entity)
4252 {
4253         assert(entity->kind == ENTITY_VARIABLE);
4254         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4255
4256         bool needs_entity = entity->variable.address_taken;
4257         type_t *type = skip_typeref(entity->declaration.type);
4258
4259         /* is it a variable length array? */
4260         if (is_type_array(type) && !type->array.size_constant) {
4261                 create_variable_length_array(entity);
4262                 return;
4263         } else if (is_type_array(type) || is_type_compound(type)) {
4264                 needs_entity = true;
4265         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4266                 needs_entity = true;
4267         }
4268
4269         if (needs_entity) {
4270                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4271                 create_variable_entity(entity,
4272                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4273                                        frame_type);
4274         } else {
4275                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4276                 entity->variable.v.value_number = next_value_number_function;
4277                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4278                                         entity);
4279                 ++next_value_number_function;
4280         }
4281 }
4282
4283 static void create_local_static_variable(entity_t *entity)
4284 {
4285         assert(entity->kind == ENTITY_VARIABLE);
4286         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4287
4288         type_t    *type = skip_typeref(entity->declaration.type);
4289         type            = get_aligned_type(type, entity->variable.alignment);
4290
4291         ir_type   *const var_type = entity->variable.thread_local ?
4292                 get_tls_type() : get_glob_type();
4293         ir_type   *const irtype   = get_ir_type(type);
4294         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4295
4296         size_t l = strlen(entity->base.symbol->string);
4297         char   buf[l + sizeof(".%u")];
4298         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4299         ident     *const id = id_unique(buf);
4300
4301         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4302
4303         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4304                 set_entity_volatility(irentity, volatility_is_volatile);
4305         }
4306
4307         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4308         entity->variable.v.entity = irentity;
4309
4310         set_entity_ld_ident(irentity, id);
4311         set_entity_variability(irentity, variability_uninitialized);
4312         set_entity_visibility(irentity, visibility_local);
4313         set_entity_allocation(irentity, entity->variable.thread_local ?
4314                 allocation_automatic : allocation_static);
4315
4316         ir_graph *const old_current_ir_graph = current_ir_graph;
4317         current_ir_graph = get_const_code_irg();
4318
4319         create_variable_initializer(entity);
4320
4321         assert(current_ir_graph == get_const_code_irg());
4322         current_ir_graph = old_current_ir_graph;
4323 }
4324
4325
4326
4327 static void return_statement_to_firm(return_statement_t *statement)
4328 {
4329         if (get_cur_block() == NULL)
4330                 return;
4331
4332         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4333         type_t   *type        = current_function_entity->declaration.type;
4334         ir_type  *func_irtype = get_ir_type(type);
4335
4336
4337         ir_node *in[1];
4338         int      in_len;
4339         if (get_method_n_ress(func_irtype) > 0) {
4340                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4341
4342                 if (statement->value != NULL) {
4343                         ir_node *node = expression_to_firm(statement->value);
4344                         if (!is_compound_type(res_type)) {
4345                                 type_t  *type = statement->value->base.type;
4346                                 ir_mode *mode = get_ir_mode_storage(type);
4347                                 node          = create_conv(dbgi, node, mode);
4348                                 node          = do_strict_conv(dbgi, node);
4349                         }
4350                         in[0] = node;
4351                 } else {
4352                         ir_mode *mode;
4353                         if (is_compound_type(res_type)) {
4354                                 mode = mode_P_data;
4355                         } else {
4356                                 mode = get_type_mode(res_type);
4357                         }
4358                         in[0] = new_Unknown(mode);
4359                 }
4360                 in_len = 1;
4361         } else {
4362                 /* build return_value for its side effects */
4363                 if (statement->value != NULL) {
4364                         expression_to_firm(statement->value);
4365                 }
4366                 in_len = 0;
4367         }
4368
4369         ir_node  *store = get_store();
4370         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4371
4372         ir_node *end_block = get_irg_end_block(current_ir_graph);
4373         add_immBlock_pred(end_block, ret);
4374
4375         set_cur_block(NULL);
4376 }
4377
4378 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4379 {
4380         if (get_cur_block() == NULL)
4381                 return NULL;
4382
4383         return expression_to_firm(statement->expression);
4384 }
4385
4386 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4387 {
4388         entity_t *entity = compound->scope.entities;
4389         for ( ; entity != NULL; entity = entity->base.next) {
4390                 if (!is_declaration(entity))
4391                         continue;
4392
4393                 create_local_declaration(entity);
4394         }
4395
4396         ir_node     *result    = NULL;
4397         statement_t *statement = compound->statements;
4398         for ( ; statement != NULL; statement = statement->base.next) {
4399                 if (statement->base.next == NULL
4400                                 && statement->kind == STATEMENT_EXPRESSION) {
4401                         result = expression_statement_to_firm(
4402                                         &statement->expression);
4403                         break;
4404                 }
4405                 statement_to_firm(statement);
4406         }
4407
4408         return result;
4409 }
4410
4411 static void create_global_variable(entity_t *entity)
4412 {
4413         assert(entity->kind == ENTITY_VARIABLE);
4414
4415         ir_visibility vis;
4416         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4417                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4418                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4419                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4420
4421                 default: panic("Invalid storage class for global variable");
4422         }
4423
4424         ir_type *var_type = entity->variable.thread_local ?
4425                 get_tls_type() : get_glob_type();
4426         create_variable_entity(entity,
4427                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4428         set_entity_visibility(entity->variable.v.entity, vis);
4429 }
4430
4431 static void create_local_declaration(entity_t *entity)
4432 {
4433         assert(is_declaration(entity));
4434
4435         /* construct type */
4436         (void) get_ir_type(entity->declaration.type);
4437         if (entity->base.symbol == NULL) {
4438                 return;
4439         }
4440
4441         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4442         case STORAGE_CLASS_STATIC:
4443                 create_local_static_variable(entity);
4444                 return;
4445         case STORAGE_CLASS_EXTERN:
4446                 if (entity->kind == ENTITY_FUNCTION) {
4447                         assert(entity->function.statement == NULL);
4448                         get_function_entity(entity);
4449                 } else {
4450                         create_global_variable(entity);
4451                         create_variable_initializer(entity);
4452                 }
4453                 return;
4454         case STORAGE_CLASS_NONE:
4455         case STORAGE_CLASS_AUTO:
4456         case STORAGE_CLASS_REGISTER:
4457                 if (entity->kind == ENTITY_FUNCTION) {
4458                         if (entity->function.statement != NULL) {
4459                                 get_function_entity(entity);
4460                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4461                                 enqueue_inner_function(entity);
4462                         } else {
4463                                 get_function_entity(entity);
4464                         }
4465                 } else {
4466                         create_local_variable(entity);
4467                 }
4468                 return;
4469         case STORAGE_CLASS_TYPEDEF:
4470                 break;
4471         }
4472         panic("invalid storage class found");
4473 }
4474
4475 static void initialize_local_declaration(entity_t *entity)
4476 {
4477         if (entity->base.symbol == NULL)
4478                 return;
4479
4480         switch ((declaration_kind_t) entity->declaration.kind) {
4481         case DECLARATION_KIND_LOCAL_VARIABLE:
4482         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4483                 create_variable_initializer(entity);
4484                 return;
4485
4486         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4487                 allocate_variable_length_array(entity);
4488                 return;
4489
4490         case DECLARATION_KIND_COMPOUND_MEMBER:
4491         case DECLARATION_KIND_GLOBAL_VARIABLE:
4492         case DECLARATION_KIND_FUNCTION:
4493         case DECLARATION_KIND_INNER_FUNCTION:
4494                 return;
4495
4496         case DECLARATION_KIND_PARAMETER:
4497         case DECLARATION_KIND_PARAMETER_ENTITY:
4498                 panic("can't initialize parameters");
4499
4500         case DECLARATION_KIND_UNKNOWN:
4501                 panic("can't initialize unknown declaration");
4502         }
4503         panic("invalid declaration kind");
4504 }
4505
4506 static void declaration_statement_to_firm(declaration_statement_t *statement)
4507 {
4508         entity_t *entity = statement->declarations_begin;
4509         if (entity == NULL)
4510                 return;
4511
4512         entity_t *const last = statement->declarations_end;
4513         for ( ;; entity = entity->base.next) {
4514                 if (is_declaration(entity)) {
4515                         initialize_local_declaration(entity);
4516                 } else if (entity->kind == ENTITY_TYPEDEF) {
4517                         type_t *const type = skip_typeref(entity->typedefe.type);
4518                         if (is_type_array(type) && type->array.is_vla)
4519                                 get_vla_size(&type->array);
4520                 }
4521                 if (entity == last)
4522                         break;
4523         }
4524 }
4525
4526 static void if_statement_to_firm(if_statement_t *statement)
4527 {
4528         ir_node *cur_block = get_cur_block();
4529
4530         ir_node *fallthrough_block = NULL;
4531
4532         /* the true (blocks) */
4533         ir_node *true_block = NULL;
4534         if (statement->true_statement != NULL) {
4535                 true_block = new_immBlock();
4536                 set_cur_block(true_block);
4537                 statement_to_firm(statement->true_statement);
4538                 if (get_cur_block() != NULL) {
4539                         ir_node *jmp = new_Jmp();
4540                         if (fallthrough_block == NULL)
4541                                 fallthrough_block = new_immBlock();
4542                         add_immBlock_pred(fallthrough_block, jmp);
4543                 }
4544         }
4545
4546         /* the false (blocks) */
4547         ir_node *false_block = NULL;
4548         if (statement->false_statement != NULL) {
4549                 false_block = new_immBlock();
4550                 set_cur_block(false_block);
4551
4552                 statement_to_firm(statement->false_statement);
4553                 if (get_cur_block() != NULL) {
4554                         ir_node *jmp = new_Jmp();
4555                         if (fallthrough_block == NULL)
4556                                 fallthrough_block = new_immBlock();
4557                         add_immBlock_pred(fallthrough_block, jmp);
4558                 }
4559         }
4560
4561         /* create the condition */
4562         if (cur_block != NULL) {
4563                 if (true_block == NULL || false_block == NULL) {
4564                         if (fallthrough_block == NULL)
4565                                 fallthrough_block = new_immBlock();
4566                         if (true_block == NULL)
4567                                 true_block = fallthrough_block;
4568                         if (false_block == NULL)
4569                                 false_block = fallthrough_block;
4570                 }
4571
4572                 set_cur_block(cur_block);
4573                 create_condition_evaluation(statement->condition, true_block,
4574                                             false_block);
4575         }
4576
4577         mature_immBlock(true_block);
4578         if (false_block != fallthrough_block && false_block != NULL) {
4579                 mature_immBlock(false_block);
4580         }
4581         if (fallthrough_block != NULL) {
4582                 mature_immBlock(fallthrough_block);
4583         }
4584
4585         set_cur_block(fallthrough_block);
4586 }
4587
4588 static void while_statement_to_firm(while_statement_t *statement)
4589 {
4590         ir_node *jmp = NULL;
4591         if (get_cur_block() != NULL) {
4592                 jmp = new_Jmp();
4593         }
4594
4595         /* create the header block */
4596         ir_node *header_block = new_immBlock();
4597         if (jmp != NULL) {
4598                 add_immBlock_pred(header_block, jmp);
4599         }
4600
4601         /* the loop body */
4602         ir_node *old_continue_label = continue_label;
4603         ir_node *old_break_label    = break_label;
4604         continue_label              = header_block;
4605         break_label                 = NULL;
4606
4607         ir_node *body_block = new_immBlock();
4608         set_cur_block(body_block);
4609         statement_to_firm(statement->body);
4610         ir_node *false_block = break_label;
4611
4612         assert(continue_label == header_block);
4613         continue_label = old_continue_label;
4614         break_label    = old_break_label;
4615
4616         if (get_cur_block() != NULL) {
4617                 jmp = new_Jmp();
4618                 add_immBlock_pred(header_block, jmp);
4619         }
4620
4621         /* shortcut for while(true) */
4622         if (is_constant_expression(statement->condition)
4623                         && fold_constant(statement->condition) != 0) {
4624                 set_cur_block(header_block);
4625                 ir_node *header_jmp = new_Jmp();
4626                 add_immBlock_pred(body_block, header_jmp);
4627
4628                 keep_alive(body_block);
4629                 keep_all_memory(body_block);
4630                 set_cur_block(body_block);
4631         } else {
4632                 if (false_block == NULL) {
4633                         false_block = new_immBlock();
4634                 }
4635
4636                 /* create the condition */
4637                 set_cur_block(header_block);
4638
4639                 create_condition_evaluation(statement->condition, body_block,
4640                                             false_block);
4641         }
4642
4643         mature_immBlock(body_block);
4644         mature_immBlock(header_block);
4645         if (false_block != NULL) {
4646                 mature_immBlock(false_block);
4647         }
4648
4649         set_cur_block(false_block);
4650 }
4651
4652 static void do_while_statement_to_firm(do_while_statement_t *statement)
4653 {
4654         ir_node *jmp = NULL;
4655         if (get_cur_block() != NULL) {
4656                 jmp = new_Jmp();
4657         }
4658
4659         /* create the header block */
4660         ir_node *header_block = new_immBlock();
4661
4662         /* the loop body */
4663         ir_node *body_block = new_immBlock();
4664         if (jmp != NULL) {
4665                 add_immBlock_pred(body_block, jmp);
4666         }
4667
4668         ir_node *old_continue_label = continue_label;
4669         ir_node *old_break_label    = break_label;
4670         continue_label              = header_block;
4671         break_label                 = NULL;
4672
4673         set_cur_block(body_block);
4674         statement_to_firm(statement->body);
4675         ir_node *false_block = break_label;
4676
4677         assert(continue_label == header_block);
4678         continue_label = old_continue_label;
4679         break_label    = old_break_label;
4680
4681         if (get_cur_block() != NULL) {
4682                 ir_node *body_jmp = new_Jmp();
4683                 add_immBlock_pred(header_block, body_jmp);
4684                 mature_immBlock(header_block);
4685         }
4686
4687         if (false_block == NULL) {
4688                 false_block = new_immBlock();
4689         }
4690
4691         /* create the condition */
4692         set_cur_block(header_block);
4693
4694         create_condition_evaluation(statement->condition, body_block, false_block);
4695         mature_immBlock(body_block);
4696         mature_immBlock(header_block);
4697         mature_immBlock(false_block);
4698
4699         set_cur_block(false_block);
4700 }
4701
4702 static void for_statement_to_firm(for_statement_t *statement)
4703 {
4704         ir_node *jmp = NULL;
4705
4706         /* create declarations */
4707         entity_t *entity = statement->scope.entities;
4708         for ( ; entity != NULL; entity = entity->base.next) {
4709                 if (!is_declaration(entity))
4710                         continue;
4711
4712                 create_local_declaration(entity);
4713         }
4714
4715         if (get_cur_block() != NULL) {
4716                 entity = statement->scope.entities;
4717                 for ( ; entity != NULL; entity = entity->base.next) {
4718                         if (!is_declaration(entity))
4719                                 continue;
4720
4721                         initialize_local_declaration(entity);
4722                 }
4723
4724                 if (statement->initialisation != NULL) {
4725                         expression_to_firm(statement->initialisation);
4726                 }
4727
4728                 jmp = new_Jmp();
4729         }
4730
4731
4732         /* create the step block */
4733         ir_node *const step_block = new_immBlock();
4734         set_cur_block(step_block);
4735         if (statement->step != NULL) {
4736                 expression_to_firm(statement->step);
4737         }
4738         ir_node *const step_jmp = new_Jmp();
4739
4740         /* create the header block */
4741         ir_node *const header_block = new_immBlock();
4742         set_cur_block(header_block);
4743         if (jmp != NULL) {
4744                 add_immBlock_pred(header_block, jmp);
4745         }
4746         add_immBlock_pred(header_block, step_jmp);
4747
4748         /* the false block */
4749         ir_node *const false_block = new_immBlock();
4750
4751         /* the loop body */
4752         ir_node *body_block;
4753         if (statement->body != NULL) {
4754                 ir_node *const old_continue_label = continue_label;
4755                 ir_node *const old_break_label    = break_label;
4756                 continue_label = step_block;
4757                 break_label    = false_block;
4758
4759                 body_block = new_immBlock();
4760                 set_cur_block(body_block);
4761                 statement_to_firm(statement->body);
4762
4763                 assert(continue_label == step_block);
4764                 assert(break_label    == false_block);
4765                 continue_label = old_continue_label;
4766                 break_label    = old_break_label;
4767
4768                 if (get_cur_block() != NULL) {
4769                         jmp = new_Jmp();
4770                         add_immBlock_pred(step_block, jmp);
4771                 }
4772         } else {
4773                 body_block = step_block;
4774         }
4775
4776         /* create the condition */
4777         set_cur_block(header_block);
4778         if (statement->condition != NULL) {
4779                 create_condition_evaluation(statement->condition, body_block,
4780                                             false_block);
4781         } else {
4782                 keep_alive(header_block);
4783                 keep_all_memory(header_block);
4784                 jmp = new_Jmp();
4785                 add_immBlock_pred(body_block, jmp);
4786         }
4787
4788         mature_immBlock(body_block);
4789         mature_immBlock(false_block);
4790         mature_immBlock(step_block);
4791         mature_immBlock(header_block);
4792         mature_immBlock(false_block);
4793
4794         set_cur_block(false_block);
4795 }
4796
4797 static void create_jump_statement(const statement_t *statement,
4798                                   ir_node *target_block)
4799 {
4800         if (get_cur_block() == NULL)
4801                 return;
4802
4803         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4804         ir_node  *jump = new_d_Jmp(dbgi);
4805         add_immBlock_pred(target_block, jump);
4806
4807         set_cur_block(NULL);
4808 }
4809
4810 static ir_node *get_break_label(void)
4811 {
4812         if (break_label == NULL) {
4813                 break_label = new_immBlock();
4814         }
4815         return break_label;
4816 }
4817
4818 static void switch_statement_to_firm(switch_statement_t *statement)
4819 {
4820         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4821
4822         ir_node *expression  = expression_to_firm(statement->expression);
4823         ir_node *cond        = new_d_Cond(dbgi, expression);
4824
4825         set_cur_block(NULL);
4826
4827         ir_node *const old_switch_cond       = current_switch_cond;
4828         ir_node *const old_break_label       = break_label;
4829         const bool     old_saw_default_label = saw_default_label;
4830         saw_default_label                    = false;
4831         current_switch_cond                  = cond;
4832         break_label                          = NULL;
4833         switch_statement_t *const old_switch = current_switch;
4834         current_switch                       = statement;
4835
4836         /* determine a free number for the default label */
4837         unsigned long num_cases = 0;
4838         long def_nr = 0;
4839         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4840                 if (l->expression == NULL) {
4841                         /* default case */
4842                         continue;
4843                 }
4844                 if (l->last_case >= l->first_case)
4845                         num_cases += l->last_case - l->first_case + 1;
4846                 if (l->last_case > def_nr)
4847                         def_nr = l->last_case;
4848         }
4849
4850         if (def_nr == INT_MAX) {
4851                 /* Bad: an overflow will occurr, we cannot be sure that the
4852                  * maximum + 1 is a free number. Scan the values a second
4853                  * time to find a free number.
4854                  */
4855                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4856
4857                 memset(bits, 0, (num_cases + 7) >> 3);
4858                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4859                         if (l->expression == NULL) {
4860                                 /* default case */
4861                                 continue;
4862                         }
4863                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4864                         if (start < num_cases && l->last_case >= 0) {
4865                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4866                                         (unsigned long)l->last_case : num_cases - 1;
4867                                 for (unsigned long cns = start; cns <= end; ++cns) {
4868                                         bits[cns >> 3] |= (1 << (cns & 7));
4869                                 }
4870                         }
4871                 }
4872                 /* We look at the first num_cases constants:
4873                  * Either they are densed, so we took the last (num_cases)
4874                  * one, or they are non densed, so we will find one free
4875                  * there...
4876                  */
4877                 unsigned long i;
4878                 for (i = 0; i < num_cases; ++i)
4879                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4880                                 break;
4881
4882                 free(bits);
4883                 def_nr = i;
4884         } else {
4885                 ++def_nr;
4886         }
4887         statement->default_proj_nr = def_nr;
4888
4889         if (statement->body != NULL) {
4890                 statement_to_firm(statement->body);
4891         }
4892
4893         if (get_cur_block() != NULL) {
4894                 ir_node *jmp = new_Jmp();
4895                 add_immBlock_pred(get_break_label(), jmp);
4896         }
4897
4898         if (!saw_default_label) {
4899                 set_cur_block(get_nodes_block(cond));
4900                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4901                                                         statement->default_proj_nr);
4902                 add_immBlock_pred(get_break_label(), proj);
4903         }
4904
4905         if (break_label != NULL) {
4906                 mature_immBlock(break_label);
4907         }
4908         set_cur_block(break_label);
4909
4910         assert(current_switch_cond == cond);
4911         current_switch      = old_switch;
4912         current_switch_cond = old_switch_cond;
4913         break_label         = old_break_label;
4914         saw_default_label   = old_saw_default_label;
4915 }
4916
4917 static void case_label_to_firm(const case_label_statement_t *statement)
4918 {
4919         if (statement->is_empty_range)
4920                 return;
4921
4922         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4923
4924         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4925
4926         ir_node *proj;
4927         ir_node *block     = new_immBlock();
4928
4929         set_cur_block(get_nodes_block(current_switch_cond));
4930         if (statement->expression != NULL) {
4931                 long pn     = statement->first_case;
4932                 long end_pn = statement->last_case;
4933                 assert(pn <= end_pn);
4934                 /* create jumps for all cases in the given range */
4935                 do {
4936                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4937                         add_immBlock_pred(block, proj);
4938                 } while(pn++ < end_pn);
4939         } else {
4940                 saw_default_label = true;
4941                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4942                                          current_switch->default_proj_nr);
4943
4944                 add_immBlock_pred(block, proj);
4945         }
4946
4947         if (fallthrough != NULL) {
4948                 add_immBlock_pred(block, fallthrough);
4949         }
4950         mature_immBlock(block);
4951         set_cur_block(block);
4952
4953         if (statement->statement != NULL) {
4954                 statement_to_firm(statement->statement);
4955         }
4956 }
4957
4958 static void label_to_firm(const label_statement_t *statement)
4959 {
4960         ir_node *block = get_label_block(statement->label);
4961
4962         if (get_cur_block() != NULL) {
4963                 ir_node *jmp = new_Jmp();
4964                 add_immBlock_pred(block, jmp);
4965         }
4966
4967         set_cur_block(block);
4968         keep_alive(block);
4969         keep_all_memory(block);
4970
4971         if (statement->statement != NULL) {
4972                 statement_to_firm(statement->statement);
4973         }
4974 }
4975
4976 static void goto_to_firm(const goto_statement_t *statement)
4977 {
4978         if (get_cur_block() == NULL)
4979                 return;
4980
4981         if (statement->expression) {
4982                 ir_node  *irn  = expression_to_firm(statement->expression);
4983                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4984                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4985
4986                 set_irn_link(ijmp, ijmp_list);
4987                 ijmp_list = ijmp;
4988         } else {
4989                 ir_node *block = get_label_block(statement->label);
4990                 ir_node *jmp   = new_Jmp();
4991                 add_immBlock_pred(block, jmp);
4992         }
4993         set_cur_block(NULL);
4994 }
4995
4996 static void asm_statement_to_firm(const asm_statement_t *statement)
4997 {
4998         bool needs_memory = false;
4999
5000         if (statement->is_volatile) {
5001                 needs_memory = true;
5002         }
5003
5004         size_t         n_clobbers = 0;
5005         asm_clobber_t *clobber    = statement->clobbers;
5006         for ( ; clobber != NULL; clobber = clobber->next) {
5007                 const char *clobber_str = clobber->clobber.begin;
5008
5009                 if (!be_is_valid_clobber(clobber_str)) {
5010                         errorf(&statement->base.source_position,
5011                                    "invalid clobber '%s' specified", clobber->clobber);
5012                         continue;
5013                 }
5014
5015                 if (strcmp(clobber_str, "memory") == 0) {
5016                         needs_memory = true;
5017                         continue;
5018                 }
5019
5020                 ident *id = new_id_from_str(clobber_str);
5021                 obstack_ptr_grow(&asm_obst, id);
5022                 ++n_clobbers;
5023         }
5024         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5025         ident **clobbers = NULL;
5026         if (n_clobbers > 0) {
5027                 clobbers = obstack_finish(&asm_obst);
5028         }
5029
5030         size_t n_inputs  = 0;
5031         asm_argument_t *argument = statement->inputs;
5032         for ( ; argument != NULL; argument = argument->next)
5033                 n_inputs++;
5034         size_t n_outputs = 0;
5035         argument = statement->outputs;
5036         for ( ; argument != NULL; argument = argument->next)
5037                 n_outputs++;
5038
5039         unsigned next_pos = 0;
5040
5041         ir_node *ins[n_inputs + n_outputs + 1];
5042         size_t   in_size = 0;
5043
5044         ir_asm_constraint tmp_in_constraints[n_outputs];
5045
5046         const expression_t *out_exprs[n_outputs];
5047         ir_node            *out_addrs[n_outputs];
5048         size_t              out_size = 0;
5049
5050         argument = statement->outputs;
5051         for ( ; argument != NULL; argument = argument->next) {
5052                 const char *constraints = argument->constraints.begin;
5053                 asm_constraint_flags_t asm_flags
5054                         = be_parse_asm_constraints(constraints);
5055
5056                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5057                         warningf(&statement->base.source_position,
5058                                "some constraints in '%s' are not supported", constraints);
5059                 }
5060                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5061                         errorf(&statement->base.source_position,
5062                                "some constraints in '%s' are invalid", constraints);
5063                         continue;
5064                 }
5065                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5066                         errorf(&statement->base.source_position,
5067                                "no write flag specified for output constraints '%s'",
5068                                constraints);
5069                         continue;
5070                 }
5071
5072                 unsigned pos = next_pos++;
5073                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5074                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5075                         expression_t *expr = argument->expression;
5076                         ir_node      *addr = expression_to_addr(expr);
5077                         /* in+output, construct an artifical same_as constraint on the
5078                          * input */
5079                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5080                                 char     buf[64];
5081                                 ir_node *value = get_value_from_lvalue(expr, addr);
5082
5083                                 snprintf(buf, sizeof(buf), "%u", pos);
5084
5085                                 ir_asm_constraint constraint;
5086                                 constraint.pos              = pos;
5087                                 constraint.constraint       = new_id_from_str(buf);
5088                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5089                                 tmp_in_constraints[in_size] = constraint;
5090                                 ins[in_size] = value;
5091
5092                                 ++in_size;
5093                         }
5094
5095                         out_exprs[out_size] = expr;
5096                         out_addrs[out_size] = addr;
5097                         ++out_size;
5098                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5099                         /* pure memory ops need no input (but we have to make sure we
5100                          * attach to the memory) */
5101                         assert(! (asm_flags &
5102                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5103                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5104                         needs_memory = true;
5105
5106                         /* we need to attach the address to the inputs */
5107                         expression_t *expr = argument->expression;
5108
5109                         ir_asm_constraint constraint;
5110                         constraint.pos              = pos;
5111                         constraint.constraint       = new_id_from_str(constraints);
5112                         constraint.mode             = NULL;
5113                         tmp_in_constraints[in_size] = constraint;
5114
5115                         ins[in_size]          = expression_to_addr(expr);
5116                         ++in_size;
5117                         continue;
5118                 } else {
5119                         errorf(&statement->base.source_position,
5120                                "only modifiers but no place set in constraints '%s'",
5121                                constraints);
5122                         continue;
5123                 }
5124
5125                 ir_asm_constraint constraint;
5126                 constraint.pos        = pos;
5127                 constraint.constraint = new_id_from_str(constraints);
5128                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5129
5130                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5131         }
5132         assert(obstack_object_size(&asm_obst)
5133                         == out_size * sizeof(ir_asm_constraint));
5134         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5135
5136
5137         obstack_grow(&asm_obst, tmp_in_constraints,
5138                      in_size * sizeof(tmp_in_constraints[0]));
5139         /* find and count input and output arguments */
5140         argument = statement->inputs;
5141         for ( ; argument != NULL; argument = argument->next) {
5142                 const char *constraints = argument->constraints.begin;
5143                 asm_constraint_flags_t asm_flags
5144                         = be_parse_asm_constraints(constraints);
5145
5146                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5147                         errorf(&statement->base.source_position,
5148                                "some constraints in '%s' are not supported", constraints);
5149                         continue;
5150                 }
5151                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5152                         errorf(&statement->base.source_position,
5153                                "some constraints in '%s' are invalid", constraints);
5154                         continue;
5155                 }
5156                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5157                         errorf(&statement->base.source_position,
5158                                "write flag specified for input constraints '%s'",
5159                                constraints);
5160                         continue;
5161                 }
5162
5163                 ir_node *input;
5164                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5165                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5166                         /* we can treat this as "normal" input */
5167                         input = expression_to_firm(argument->expression);
5168                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5169                         /* pure memory ops need no input (but we have to make sure we
5170                          * attach to the memory) */
5171                         assert(! (asm_flags &
5172                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5173                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5174                         needs_memory = true;
5175                         input = expression_to_addr(argument->expression);
5176                 } else {
5177                         errorf(&statement->base.source_position,
5178                                "only modifiers but no place set in constraints '%s'",
5179                                constraints);
5180                         continue;
5181                 }
5182
5183                 ir_asm_constraint constraint;
5184                 constraint.pos        = next_pos++;
5185                 constraint.constraint = new_id_from_str(constraints);
5186                 constraint.mode       = get_irn_mode(input);
5187
5188                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5189                 ins[in_size++] = input;
5190         }
5191
5192         if (needs_memory) {
5193                 ir_asm_constraint constraint;
5194                 constraint.pos        = next_pos++;
5195                 constraint.constraint = new_id_from_str("");
5196                 constraint.mode       = mode_M;
5197
5198                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5199                 ins[in_size++] = get_store();
5200         }
5201
5202         assert(obstack_object_size(&asm_obst)
5203                         == in_size * sizeof(ir_asm_constraint));
5204         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5205
5206         /* create asm node */
5207         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5208
5209         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5210
5211         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5212                                   out_size, output_constraints,
5213                                   n_clobbers, clobbers, asm_text);
5214
5215         if (statement->is_volatile) {
5216                 set_irn_pinned(node, op_pin_state_pinned);
5217         } else {
5218                 set_irn_pinned(node, op_pin_state_floats);
5219         }
5220
5221         /* create output projs & connect them */
5222         if (needs_memory) {
5223                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5224                 set_store(projm);
5225         }
5226
5227         size_t i;
5228         for (i = 0; i < out_size; ++i) {
5229                 const expression_t *out_expr = out_exprs[i];
5230                 long                pn       = i;
5231                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5232                 ir_node            *proj     = new_Proj(node, mode, pn);
5233                 ir_node            *addr     = out_addrs[i];
5234
5235                 set_value_for_expression_addr(out_expr, proj, addr);
5236         }
5237 }
5238
5239 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5240 {
5241         statement_to_firm(statement->try_statement);
5242         warningf(&statement->base.source_position, "structured exception handling ignored");
5243 }
5244
5245 static void     leave_statement_to_firm(leave_statement_t *statement)
5246 {
5247         errorf(&statement->base.source_position, "__leave not supported yet");
5248 }
5249
5250 /**
5251  * Transform a statement.
5252  */
5253 static void statement_to_firm(statement_t *statement)
5254 {
5255 #ifndef NDEBUG
5256         assert(!statement->base.transformed);
5257         statement->base.transformed = true;
5258 #endif
5259
5260         switch (statement->kind) {
5261         case STATEMENT_INVALID:
5262                 panic("invalid statement found");
5263         case STATEMENT_EMPTY:
5264                 /* nothing */
5265                 return;
5266         case STATEMENT_COMPOUND:
5267                 compound_statement_to_firm(&statement->compound);
5268                 return;
5269         case STATEMENT_RETURN:
5270                 return_statement_to_firm(&statement->returns);
5271                 return;
5272         case STATEMENT_EXPRESSION:
5273                 expression_statement_to_firm(&statement->expression);
5274                 return;
5275         case STATEMENT_IF:
5276                 if_statement_to_firm(&statement->ifs);
5277                 return;
5278         case STATEMENT_WHILE:
5279                 while_statement_to_firm(&statement->whiles);
5280                 return;
5281         case STATEMENT_DO_WHILE:
5282                 do_while_statement_to_firm(&statement->do_while);
5283                 return;
5284         case STATEMENT_DECLARATION:
5285                 declaration_statement_to_firm(&statement->declaration);
5286                 return;
5287         case STATEMENT_BREAK:
5288                 create_jump_statement(statement, get_break_label());
5289                 return;
5290         case STATEMENT_CONTINUE:
5291                 create_jump_statement(statement, continue_label);
5292                 return;
5293         case STATEMENT_SWITCH:
5294                 switch_statement_to_firm(&statement->switchs);
5295                 return;
5296         case STATEMENT_CASE_LABEL:
5297                 case_label_to_firm(&statement->case_label);
5298                 return;
5299         case STATEMENT_FOR:
5300                 for_statement_to_firm(&statement->fors);
5301                 return;
5302         case STATEMENT_LABEL:
5303                 label_to_firm(&statement->label);
5304                 return;
5305         case STATEMENT_GOTO:
5306                 goto_to_firm(&statement->gotos);
5307                 return;
5308         case STATEMENT_ASM:
5309                 asm_statement_to_firm(&statement->asms);
5310                 return;
5311         case STATEMENT_MS_TRY:
5312                 ms_try_statement_to_firm(&statement->ms_try);
5313                 return;
5314         case STATEMENT_LEAVE:
5315                 leave_statement_to_firm(&statement->leave);
5316                 return;
5317         }
5318         panic("statement not implemented");
5319 }
5320
5321 static int count_local_variables(const entity_t *entity,
5322                                  const entity_t *const last)
5323 {
5324         int count = 0;
5325         entity_t const *const end = last != NULL ? last->base.next : NULL;
5326         for (; entity != end; entity = entity->base.next) {
5327                 type_t *type;
5328                 bool    address_taken;
5329
5330                 if (entity->kind == ENTITY_VARIABLE) {
5331                         type          = skip_typeref(entity->declaration.type);
5332                         address_taken = entity->variable.address_taken;
5333                 } else if (entity->kind == ENTITY_PARAMETER) {
5334                         type          = skip_typeref(entity->declaration.type);
5335                         address_taken = entity->parameter.address_taken;
5336                 } else {
5337                         continue;
5338                 }
5339
5340                 if (!address_taken && is_type_scalar(type))
5341                         ++count;
5342         }
5343         return count;
5344 }
5345
5346 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5347 {
5348         int *const count = env;
5349
5350         switch (stmt->kind) {
5351         case STATEMENT_DECLARATION: {
5352                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5353                 *count += count_local_variables(decl_stmt->declarations_begin,
5354                                 decl_stmt->declarations_end);
5355                 break;
5356         }
5357
5358         case STATEMENT_FOR:
5359                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5360                 break;
5361
5362         default:
5363                 break;
5364         }
5365 }
5366
5367 static int get_function_n_local_vars(entity_t *entity)
5368 {
5369         int count = 0;
5370
5371         /* count parameters */
5372         count += count_local_variables(entity->function.parameters.entities, NULL);
5373
5374         /* count local variables declared in body */
5375         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5376                         &count);
5377         return count;
5378 }
5379
5380 static void initialize_function_parameters(entity_t *entity)
5381 {
5382         assert(entity->kind == ENTITY_FUNCTION);
5383         ir_graph *irg             = current_ir_graph;
5384         ir_node  *args            = get_irg_args(irg);
5385         ir_node  *start_block     = get_irg_start_block(irg);
5386         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5387
5388         int       n         = 0;
5389         entity_t *parameter = entity->function.parameters.entities;
5390         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5391                 if (parameter->kind != ENTITY_PARAMETER)
5392                         continue;
5393
5394                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5395                 type_t *type = skip_typeref(parameter->declaration.type);
5396
5397                 bool needs_entity = parameter->parameter.address_taken;
5398                 assert(!is_type_array(type));
5399                 if (is_type_compound(type)) {
5400                         needs_entity = true;
5401                 }
5402
5403                 if (needs_entity) {
5404                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5405                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5406                         set_entity_ident(entity, id);
5407
5408                         parameter->declaration.kind
5409                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5410                         parameter->parameter.v.entity = entity;
5411                         continue;
5412                 }
5413
5414                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5415                 ir_mode *param_mode   = get_type_mode(param_irtype);
5416
5417                 long     pn    = n;
5418                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5419
5420                 ir_mode *mode = get_ir_mode_storage(type);
5421                 value = create_conv(NULL, value, mode);
5422                 value = do_strict_conv(NULL, value);
5423
5424                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5425                 parameter->parameter.v.value_number = next_value_number_function;
5426                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5427                                         parameter);
5428                 ++next_value_number_function;
5429
5430                 set_value(parameter->parameter.v.value_number, value);
5431         }
5432 }
5433
5434 /**
5435  * Handle additional decl modifiers for IR-graphs
5436  *
5437  * @param irg            the IR-graph
5438  * @param dec_modifiers  additional modifiers
5439  */
5440 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5441 {
5442         if (decl_modifiers & DM_RETURNS_TWICE) {
5443                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5444                 set_irg_additional_property(irg, mtp_property_returns_twice);
5445         }
5446         if (decl_modifiers & DM_NORETURN) {
5447                 /* TRUE if the declaration includes the Microsoft
5448                    __declspec(noreturn) specifier. */
5449                 set_irg_additional_property(irg, mtp_property_noreturn);
5450         }
5451         if (decl_modifiers & DM_NOTHROW) {
5452                 /* TRUE if the declaration includes the Microsoft
5453                    __declspec(nothrow) specifier. */
5454                 set_irg_additional_property(irg, mtp_property_nothrow);
5455         }
5456         if (decl_modifiers & DM_NAKED) {
5457                 /* TRUE if the declaration includes the Microsoft
5458                    __declspec(naked) specifier. */
5459                 set_irg_additional_property(irg, mtp_property_naked);
5460         }
5461         if (decl_modifiers & DM_FORCEINLINE) {
5462                 /* TRUE if the declaration includes the
5463                    Microsoft __forceinline specifier. */
5464                 set_irg_inline_property(irg, irg_inline_forced);
5465         }
5466         if (decl_modifiers & DM_NOINLINE) {
5467                 /* TRUE if the declaration includes the Microsoft
5468                    __declspec(noinline) specifier. */
5469                 set_irg_inline_property(irg, irg_inline_forbidden);
5470         }
5471 }
5472
5473 static void add_function_pointer(ir_type *segment, ir_entity *method,
5474                                  const char *unique_template)
5475 {
5476         ir_type   *method_type  = get_entity_type(method);
5477         ident     *id           = id_unique(unique_template);
5478         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5479
5480         ident     *ide          = id_unique(unique_template);
5481         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5482         ir_graph  *irg          = get_const_code_irg();
5483         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5484                                                            method, NULL);
5485
5486         set_entity_compiler_generated(ptr, 1);
5487         set_entity_variability(ptr, variability_constant);
5488         set_atomic_ent_value(ptr, val);
5489 }
5490
5491 /**
5492  * Generate possible IJmp branches to a given label block.
5493  */
5494 static void gen_ijmp_branches(ir_node *block)
5495 {
5496         ir_node *ijmp;
5497         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5498                 add_immBlock_pred(block, ijmp);
5499         }
5500 }
5501
5502 /**
5503  * Create code for a function.
5504  */
5505 static void create_function(entity_t *entity)
5506 {
5507         assert(entity->kind == ENTITY_FUNCTION);
5508         ir_entity *function_entity = get_function_entity(entity);
5509
5510         if (entity->function.statement == NULL)
5511                 return;
5512
5513         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5514                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5515                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5516         }
5517         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5518                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5519                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5520         }
5521
5522         current_function_entity = entity;
5523         current_function_name   = NULL;
5524         current_funcsig         = NULL;
5525
5526         assert(all_labels == NULL);
5527         all_labels = NEW_ARR_F(label_t *, 0);
5528         ijmp_list  = NULL;
5529
5530         int       n_local_vars = get_function_n_local_vars(entity);
5531         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5532
5533         ir_graph *old_current_function = current_function;
5534         current_function = irg;
5535
5536         set_irg_fp_model(irg, firm_opt.fp_model);
5537         tarval_enable_fp_ops(1);
5538         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5539
5540         ir_node *first_block = get_cur_block();
5541
5542         /* set inline flags */
5543         if (entity->function.is_inline)
5544                 set_irg_inline_property(irg, irg_inline_recomended);
5545         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5546
5547         next_value_number_function = 0;
5548         initialize_function_parameters(entity);
5549
5550         statement_to_firm(entity->function.statement);
5551
5552         ir_node *end_block = get_irg_end_block(irg);
5553
5554         /* do we have a return statement yet? */
5555         if (get_cur_block() != NULL) {
5556                 type_t *type = skip_typeref(entity->declaration.type);
5557                 assert(is_type_function(type));
5558                 const function_type_t *func_type   = &type->function;
5559                 const type_t          *return_type
5560                         = skip_typeref(func_type->return_type);
5561
5562                 ir_node *ret;
5563                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5564                         ret = new_Return(get_store(), 0, NULL);
5565                 } else {
5566                         ir_mode *mode;
5567                         if (is_type_scalar(return_type)) {
5568                                 mode = get_ir_mode_storage(func_type->return_type);
5569                         } else {
5570                                 mode = mode_P_data;
5571                         }
5572
5573                         ir_node *in[1];
5574                         /* §5.1.2.2.3 main implicitly returns 0 */
5575                         if (is_main(entity)) {
5576                                 in[0] = new_Const(get_mode_null(mode));
5577                         } else {
5578                                 in[0] = new_Unknown(mode);
5579                         }
5580                         ret = new_Return(get_store(), 1, in);
5581                 }
5582                 add_immBlock_pred(end_block, ret);
5583         }
5584
5585         bool has_computed_gotos = false;
5586         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5587                 label_t *label = all_labels[i];
5588                 if (label->address_taken) {
5589                         gen_ijmp_branches(label->block);
5590                         has_computed_gotos = true;
5591                 }
5592                 mature_immBlock(label->block);
5593         }
5594         if (has_computed_gotos) {
5595                 /* if we have computed goto's in the function, we cannot inline it */
5596                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5597                         warningf(&entity->base.source_position,
5598                                  "function '%Y' can never be inlined because it contains a computed goto",
5599                                  entity->base.symbol);
5600                 }
5601                 set_irg_inline_property(irg, irg_inline_forbidden);
5602         }
5603
5604         DEL_ARR_F(all_labels);
5605         all_labels = NULL;
5606
5607         mature_immBlock(first_block);
5608         mature_immBlock(end_block);
5609
5610         irg_finalize_cons(irg);
5611
5612         /* finalize the frame type */
5613         ir_type *frame_type = get_irg_frame_type(irg);
5614         int      n          = get_compound_n_members(frame_type);
5615         int      align_all  = 4;
5616         int      offset     = 0;
5617         for (int i = 0; i < n; ++i) {
5618                 ir_entity *entity      = get_compound_member(frame_type, i);
5619                 ir_type   *entity_type = get_entity_type(entity);
5620
5621                 int align = get_type_alignment_bytes(entity_type);
5622                 if (align > align_all)
5623                         align_all = align;
5624                 int misalign = 0;
5625                 if (align > 0) {
5626                         misalign  = offset % align;
5627                         if (misalign > 0) {
5628                                 offset += align - misalign;
5629                         }
5630                 }
5631
5632                 set_entity_offset(entity, offset);
5633                 offset += get_type_size_bytes(entity_type);
5634         }
5635         set_type_size_bytes(frame_type, offset);
5636         set_type_alignment_bytes(frame_type, align_all);
5637
5638         irg_vrfy(irg);
5639         current_function = old_current_function;
5640
5641         /* create inner functions */
5642         entity_t *inner;
5643         for (inner = next_inner_function(); inner != NULL;
5644              inner = next_inner_function()) {
5645                 create_function(inner);
5646         }
5647 }
5648
5649 static void scope_to_firm(scope_t *scope)
5650 {
5651         /* first pass: create declarations */
5652         entity_t *entity = scope->entities;
5653         for ( ; entity != NULL; entity = entity->base.next) {
5654                 if (entity->base.symbol == NULL)
5655                         continue;
5656
5657                 if (entity->kind == ENTITY_FUNCTION) {
5658                         if (entity->function.btk != bk_none) {
5659                                 /* builtins have no representation */
5660                                 continue;
5661                         }
5662                         get_function_entity(entity);
5663                 } else if (entity->kind == ENTITY_VARIABLE) {
5664                         create_global_variable(entity);
5665                 }
5666         }
5667
5668         /* second pass: create code/initializers */
5669         entity = scope->entities;
5670         for ( ; entity != NULL; entity = entity->base.next) {
5671                 if (entity->base.symbol == NULL)
5672                         continue;
5673
5674                 if (entity->kind == ENTITY_FUNCTION) {
5675                         if (entity->function.btk != bk_none) {
5676                                 /* builtins have no representation */
5677                                 continue;
5678                         }
5679                         create_function(entity);
5680                 } else if (entity->kind == ENTITY_VARIABLE) {
5681                         assert(entity->declaration.kind
5682                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5683                         current_ir_graph = get_const_code_irg();
5684                         create_variable_initializer(entity);
5685                 }
5686         }
5687 }
5688
5689 void init_ast2firm(void)
5690 {
5691         obstack_init(&asm_obst);
5692         init_atomic_modes();
5693
5694         /* OS option must be set to the backend */
5695         switch (firm_opt.os_support) {
5696         case OS_SUPPORT_MINGW:
5697                 create_ld_ident = create_name_win32;
5698                 break;
5699         case OS_SUPPORT_LINUX:
5700                 create_ld_ident = create_name_linux_elf;
5701                 break;
5702         case OS_SUPPORT_MACHO:
5703                 create_ld_ident = create_name_macho;
5704                 break;
5705         default:
5706                 panic("unexpected OS support mode");
5707         }
5708
5709         /* create idents for all known runtime functions */
5710         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5711                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5712         }
5713
5714         entitymap_init(&entitymap);
5715 }
5716
5717 static void init_ir_types(void)
5718 {
5719         static int ir_types_initialized = 0;
5720         if (ir_types_initialized)
5721                 return;
5722         ir_types_initialized = 1;
5723
5724         ir_type_int        = get_ir_type(type_int);
5725         ir_type_const_char = get_ir_type(type_const_char);
5726         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5727         ir_type_void       = get_ir_type(type_void);
5728
5729         const backend_params *be_params = be_get_backend_param();
5730         mode_float_arithmetic = be_params->mode_float_arithmetic;
5731 }
5732
5733 void exit_ast2firm(void)
5734 {
5735         entitymap_destroy(&entitymap);
5736         obstack_free(&asm_obst, NULL);
5737 }
5738
5739 static void global_asm_to_firm(statement_t *s)
5740 {
5741         for (; s != NULL; s = s->base.next) {
5742                 assert(s->kind == STATEMENT_ASM);
5743
5744                 char const *const text = s->asms.asm_text.begin;
5745                 size_t            size = s->asms.asm_text.size;
5746
5747                 /* skip the last \0 */
5748                 if (text[size - 1] == '\0')
5749                         --size;
5750
5751                 ident *const id = new_id_from_chars(text, size);
5752                 add_irp_asm(id);
5753         }
5754 }
5755
5756 void translation_unit_to_firm(translation_unit_t *unit)
5757 {
5758         /* just to be sure */
5759         continue_label           = NULL;
5760         break_label              = NULL;
5761         current_switch_cond      = NULL;
5762         current_translation_unit = unit;
5763
5764         init_ir_types();
5765         inner_functions = NEW_ARR_F(entity_t *, 0);
5766
5767         scope_to_firm(&unit->scope);
5768         global_asm_to_firm(unit->global_asm);
5769
5770         DEL_ARR_F(inner_functions);
5771         inner_functions  = NULL;
5772
5773         current_ir_graph         = NULL;
5774         current_translation_unit = NULL;
5775 }