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